JP5211673B2 - AC / DC conversion circuit of heating device for heating element storage box cooling device - Google Patents

Description

  The present invention is a box structure that is installed outdoors, has a heating element inside, has a large amount of heat generation, has cooling even in winter, and has a precision that greatly affects performance and life due to temperature. In particular, the present invention relates to an AC / DC conversion circuit for a heating device for a heating device housing cooling device.

  Conventionally, as a circuit used for the AC / DC conversion circuit of the heating device for this type of heating element storage case cooling device, the same system as the external DC power source which is the main power supplied from the heating element storage case cooling device (for example, DC24V or DC48V). ) Using a commercial power transformer designed in advance so as to be (see Non-Patent Document 1, for example).

  Hereinafter, the AC / DC conversion circuit of the heating device for the heating element housing case cooling device based on the circuit proposal will be described with reference to FIGS. 18, 19 and 20. FIG.

  As shown in the figure, the cooling device 102 that cools the heating element storage box 101 includes heat of the air inside the heating element storage box 101 (hereinafter referred to as inside air) and air outside the heating element storage box 101 (hereinafter referred to as outside air). The heat exchanger 103 as a heat exchanging means for exchanging heat with the heat of the heat generator 103 and the inside air of the heating element storage box 101 are taken in and exchanged with the outside air by the heat exchanger 103 and blown into the heating element storage box 101. An inside air circulation air passage 104 and an inside air fan motor 105 as inside air circulation air blowing means for blowing inside air are provided, the outside air in the heating element storage box 101 is taken in, and the heat exchanger 103 exchanges heat with the inside air, thereby generating the heating element. An outside air circulation air passage for blowing air outside the storage box 101, an outside air fan motor 106 as outside air circulation air blowing means for circulating outside air, the inside air fan motor 105 and the outside air fan motor. And an external DC power source 108 as a main power source of the cooling device 102 is supplied from the heating element housing box 101, and the power of the inside air fan motor 105 and the outside air fan motor 106 is supplied. Are connected to the inside air fan motor 105 and the outside air fan motor 106 via the first backflow prevention element 109.

  The heating device 110 for the heating element storage case cooling apparatus includes an electric heater 111 that warms the inside air of the heating element storage case 101 in the inside air circulation air passage 104, and an external AC power source supplied from the heating element storage case 101. 112 is connected to an electric heater 111 via a contact of a relay 113 driven by the control device 107, and the external AC power source 112 is input to a commercial power transformer 114 as an AC / DC converter, and the output of the commercial power transformer 114 is supplied. The rectified and smoothed DC voltage V2 is connected to the smoothing capacitor 116 via the diode bridge 115, and is connected to the inside air fan motor 105 and the outside air fan motor 106 via the second backflow prevention element 117. .

  Here, the output voltage of the commercial power transformer 114 is set such that the DC voltage V2 is the same as the power system voltage (for example, DC 24V or DC 48V) of the input DC voltage V1 of the external DC power supply 108. ing.

  With the above configuration, when it is necessary to warm the inside of the heating element storage box 101 in order to stably operate a device (not shown) mounted in the heating element storage box 101, the contact of the relay 113 is closed. Then, the voltage of the external AC power source 112 is applied to the electric heater 111 to cause the electric heater 111 to generate heat and drive the internal air fan motor 105, so that the heating element storage box 101 flowing in the internal air circulation air passage 104 is heated. The inside air is blown into the heating element storage box 101 to warm the heating element storage box 101. At this time, the outside air fan motor 106 is stopped so that the inside air of the heating element storage box 101 does not uselessly exchange heat with the outside air of the heating element storage box 101 via the heat exchange element 103.

  Further, even when the external DC power supply 108 that is the main power supply is not supplied, the internal air fan motor 105 can be driven by using the DC power supply V2 as power to warm the heating element storage case 101.

  In this way, when the heating element storage box 101 is warmed, the commercial power transformer 114 set in advance so as to have the same power system voltage as that of the external DC power supply 108 even if the external DC power supply 108 is not supplied. Since the same DC voltage as that of the external DC power supply 108 is applied to the indoor air fan motor 105, the internal air fan motor 105 operates at the same rotational speed as the external DC power supply 108 is applied. doing.

Published by Toro Jiro, "Transistor Technology March 1987 Issue: Special Issue: Power Supply Circuit Practical Design Manual", CQ Publisher, published March 1, 1987

  In such a conventional AC / DC conversion circuit for a heating device for a cooling device for a heating element housing, a plurality of power system voltages (for example, DC 24 V, DC 48 V) exist in the external DC power supply supplied from the heating element housing case. Therefore, it is necessary to prepare a heating device for a heating element housing case cooling device for each power supply system voltage, and there is a problem of taking up space for storage in consideration of service maintenance.

  In addition, it is necessary to install a heating device for the heating element storage box cooling device that matches the power supply system voltage of the external DC power supply supplied from the heating element storage box during installation or service maintenance. There was a problem such as equipment failure.

  Furthermore, in order to avoid the above-mentioned problems, workers at the time of installation and service maintenance also have a work man-hour such as confirming the power system voltage, and improvement of work efficiency has also been a problem.

  In addition, there is a problem that an operator at the time of installation or service maintenance wants to easily check the normal operation after the heating device for the heating element storage case cooling device, and the external AC power source is transformed, rectified and smoothed by AC / DC means. There is a need to provide a heating device for a heating element housing case cooling device that automatically switches a DC voltage according to a power system voltage of an external DC power supply.

  In addition, there is a problem of abnormal voltage that the voltage of the external DC power supply after installation deviates from the assumed power supply system voltage, or the ground phase of the external DC power supply floats from the ground potential due to a connection failure, etc. It is required to detect an abnormality promptly at the time of an abnormal voltage, disconnect the DC power source from the power, and operate the circulating air blowing means with a DC voltage obtained by transforming and smoothing the external AC power source supplied from the heating element storage case.

  In addition, there is a problem that normal operation after the heating device for the heating element storage case cooling device cannot be understood in a remote place such as an operation center of a mobile phone base station, and it is required that normal operation can be confirmed in a remote place. ing.

  The present invention solves such a conventional problem, and this power system voltage can be automatically determined to cope with each of a plurality of power system voltages of the external DC power source. It is not necessary to prepare a heating device for the cooling device for the heating element storage box, there is no need to check the power system voltage before installation without any mistakes in installation, and normal operation can be recognized. It is an object of the present invention to provide an AC / DC conversion circuit for a heating device for a heating element storage case cooling device that can confirm normal operation.

In order to achieve the above object, the heating element storage case cooling device of the present invention is a heat exchange means for exchanging heat of the inside air in the heating element storage case with the heat of the outside air outside the heating element storage case, and the heating element. An internal air circulation air passage that takes in the inside air in the storage box and exchanges heat with the heat exchange means and circulates and blows the air inside the heating element storage box, an internal air circulation blower that circulates the inside air, and the outside of the heating element storage box An outside air circulation air passage that takes in outside air and exchanges heat with the heat of the inside air in the heating element storage box by the heat exchange means, and circulates and blows air outside the heating element storage box, and an outside air circulation blowing means that circulates the outside air. And an electric heater for warming the heating element housing box in preparation for the inside air circulation air passage, and a control device for operating the inside air circulation blowing means and the outside air circulation blowing means, and the inside air circulation blowing means and the outside air circulation blowing means. External DC power And an external AC power source the a electric heater power and source, the external AC is power connections and the commercial power transformer that having a plurality of taps, the DC voltage output obtained from said commercial power transformer of the external DC power supply in AC-DC converter circuit of the origination heat medium storage box making the cooling apparatus for a heating device and a tap switching unit for switching a plurality of taps so as to match the power supply system voltage, the external DC power source, earth ground is positive-side potential A high-voltage power system voltage as a ground phase connected to the ground and a low-voltage power system voltage as a ground phase to which the negative side potential is connected to the earth ground. by detecting the positive-side potential or the negative electrode side potential and determines the power system voltage of the external DC power supply, is characterized in that to operate the tap changing means

By this means, the control device automatically switches the tap of the commercial power transformer with a tap by determining the power system voltage of the input voltage of the external DC power source, and when the heating element housing box is warmed, the external DC power is Even if not supplied, a DC voltage in the same voltage range as the power supply system voltage of the external DC power supply is applied to the inside air circulation blowing means, and the inside air circulation blowing means can ensure the operation when the external DC power supply is applied. An AC / DC conversion circuit of the heating device for the heating element housing case cooling device is obtained.

  The other means is characterized by operating a plurality of switch elements of the tap switching means connected to the tap provided in the primary winding of the commercial power transformer.

  By using this means, a commercial power transformer with a tap provided with a tap in the primary winding is used, so tap switching can be performed automatically using tap switching means with a small current capacity. Even if the external DC power is not supplied, a DC voltage in the same voltage range as the power supply system voltage of the external DC power supply is applied to the internal air circulating air blowing means, and the internal air circulating air blowing means operates when an external DC power supply is applied. Thus, an AC / DC conversion circuit for a heating device for a heating element storage case cooling device can be obtained.

  The other means is characterized by operating a plurality of switch elements of the tap switching means connected to the tap provided in the secondary winding of the commercial power transformer.

  By using this means, a tapped commercial power transformer with a tap on the secondary winding is used, so tap switching can be performed automatically using tap switching means with a low withstand voltage, so when heating the heating element storage case Even if the external DC power is not supplied, a DC voltage in the same voltage range as the power supply system voltage of the external DC power supply is applied to the internal air circulating air blowing means, and the internal air circulating air blowing means operates when an external DC power supply is applied. Thus, an AC / DC conversion circuit for a heating device for a heating element storage case cooling device can be obtained.

  The other means is provided with a rotation speed detection means for detecting the rotation speed of the fan motor, which is the inside air circulation blower means, when there is no external DC power supply and the power of the inside air circulation blower means is supplied by the external AC power supply. In addition, the tap switching means is set so that the output of the tapped commercial power transformer is on the low pressure side, and the rotational speed detected by the rotational speed detecting means of the inside-air circulating blower means does not reach the desired rotational speed. In this case, the power supply system voltage of the external DC power supply is determined to be on the high voltage side, and the tap switching means is switched so that the output of the tapped commercial power supply transformer is on the high voltage side.

  By this means, tap rotation of the commercial power transformer with tap is performed by comparing the rotation speed of the inside-air circulating air blowing means detected by the rotation speed detection means with a predetermined rotation speed and judging the power system voltage of the external DC power supply. Therefore, when the heating element storage case is warmed, a DC voltage in the same voltage range as the power system voltage of the external DC power supply is applied to the internal air circulation blowing means even if the external DC power is not supplied. The circulating air blowing means can provide an AC / DC conversion circuit for a heating device for a heating element housing cooling device that can be operated at the same rotational speed as when an external DC power supply is applied.

  In addition, the other means includes a current detection means connected in series to the input portion of the inside air circulation blowing means, there is no supply of an external DC power supply, and when the power of the inside air circulation blowing means is supplied by an external AC power supply, When the tap switching means is set so that the output of the tapped commercial power transformer is on the low voltage side, and the current value detected by the current detection means does not reach a desired value, the power supply system of the external DC power supply It is determined that the voltage is on the high voltage side, and the tap switching means is switched so that the output of the tapped commercial power transformer is on the high voltage side.

  By this means, the tap value of the commercial power transformer with tap is automatically switched by comparing the value of the current flowing through the inside air circulating air blowing means detected by the current detecting means and a preset desired value to determine the power system voltage of the external DC power supply. Therefore, when the heating element storage case is warmed, even if the external DC power is not supplied, a DC voltage in the same voltage range as the power supply system voltage of the external DC power supply is applied to the internal air circulation blowing means, and the internal air circulation The blower means can obtain an AC / DC conversion circuit of a heating device for a heating element storage case cooling device capable of ensuring an operation when an external DC power supply is applied.

  In addition, the other means includes a temperature detecting means for detecting the temperature of the inside air circulated in the inside air circulation air passage, and there is no supply of an external DC power supply, and the external AC power supply is supplied to an electric heater that warms the heating element storage case. When energized and the power of the inside-air circulating air blowing means is supplied by an external AC power source, the tap switching means is set so that the output of the tapped commercial power transformer is on the low pressure side, and is detected by the temperature detecting means. When the temperature falls below a desired temperature, the power supply system voltage of the external DC power supply is determined to be on the high voltage side, and the tap switching means is switched so that the output of the tapped commercial power transformer is on the high voltage side. It is characterized by this.

  By this means, when heating the heating element storage case, the tap of the external DC power supply is determined by comparing the temperature of the inside air flowing through the inside air circulation air passage detected by the temperature detecting means with a preset temperature. Since the tap switching of the commercial power transformer is automatically performed, even when the external DC power is not supplied, a DC voltage in the same voltage range as the power supply system voltage of the external DC power supply is applied to the internal air circulation blower, and the internal air circulation blower is applied. As a means, an AC / DC conversion circuit of a heating device for a heating element housing cooling device capable of ensuring operation when an external DC power supply is applied can be obtained.

  The other means is provided with a power on / off means for applying an external DC power source to the inside air circulating air blowing means and the outside air circulation air blowing means, and the external DC power is detected by the input voltage detecting means for detecting the input voltage of the external DC power source. After determining the power supply system voltage of the power supply, when the input voltage of the external DC power supply does not match the preset power supply system voltage of the external DC power supply, the power on / off means is opened and the inside air circulation is The power to the blowing means and the outside air circulation blowing means is supplied by an external AC power source.

  By this means, when the input voltage detection means determines that the input voltage of the external DC power supply is an abnormal voltage, the power supply ON / OFF means is opened to cut off the application of the external DC voltage to the inside air circulation air blowing means and the outside air circulation air blowing means. Since the tap switching of the tapped commercial power transformer is automatically performed so as to match the power system voltage once determined from the input voltage of the external DC power source detected by the input voltage detecting means, the external DC power A DC voltage in the same voltage range as the power supply system voltage of the power source is applied to the inside air circulation air blowing means and the outside air circulation air blowing means, and the inside air circulation air blowing means and the outside air circulation air blowing means are applied when the external DC power source is applied. An AC / DC conversion circuit of a heating device for a heating element housing case cooling device capable of ensuring operation can be obtained.

  In addition, another means is provided with a power on / off means for applying an external DC power source to the inside air circulating air blowing means and the outside air circulation air blowing means, and detects the potential difference between the positive electrode side potential of the external DC power source and the ground. A voltage system between the negative DC side of the external DC power supply and a ground voltage detection means for detecting a potential difference between the ground and the negative DC side of the external DC power supply; When the voltage no longer matches the preset power supply system voltage of the external DC power supply, the power on / off means is opened, and the power to the inside air circulating air blowing means and the outside air circulating air blowing means is supplied to the commercial power transformer with tap. The tap switching means is switched so that the output becomes the power supply system voltage of the external DC power supply once determined and supplied by the external AC power supply.

  By this means, when the input voltage of the external DC power source is determined to be an abnormal voltage by the positive side ground voltage detecting unit and the negative side ground voltage detecting unit, the power on / off unit is opened and the inside air circulation blowing unit and the outside air circulation blowing are opened. The application of the external DC voltage to the device is cut off, and the potential difference between the positive electrode side potential of the external DC power source and the ground detected by the positive electrode side ground voltage detection unit and the negative electrode side ground voltage detection unit, and the external DC By automatically switching the tap of the commercial power transformer with tap so as to match the power supply system voltage of the external DC voltage once determined between the negative potential of the power supply and the ground, the power supply of the external DC power supply A DC voltage in the same voltage range as the system voltage is applied to the inside air circulating air blowing means and the outside air circulating air blowing means, Air circulating blower means, AC-DC converter circuit of the heating element storing box making the cooling apparatus for a heating device capable of ensuring the operation when the external DC power supply is applied is obtained.

  In addition, the other means is characterized by comprising a light emitting display means or a sound generating means for notifying the result of determining the power supply system voltage of the external power supply voltage.

  By this means, the result of determining the power supply system voltage of the external power supply voltage or the abnormal voltage of this external power supply voltage can be notified by the light emitting display means or the sound generation means, so that the installer or serviceman can set the external power supply voltage. By recognizing that this is an abnormal voltage of the power supply system voltage or this external power supply voltage, even if the external DC power is not supplied due to repair work by an installer or service person, the power supply system of the external DC power supply is supplied to the inside air circulation blower means A DC voltage in the same voltage range as the voltage is applied, and the internal air circulation blower means can obtain an AC / DC conversion circuit of a heating device for a heating element storage case cooling device that can ensure operation when an external DC power supply is applied. It is done.

  In addition, the other means is characterized by comprising a communication means for notifying an operation center that remotely monitors the result of determining the power supply system voltage of the external power supply voltage.

  By this means, the result of determining the power supply system voltage of the external power supply voltage or information that the external power supply voltage is an abnormal voltage can be included in the communication, so that the external power supply can be remotely located outside the heating element storage box. By recognizing that the voltage is a power supply system voltage or an abnormal voltage of this external power supply voltage, even if the external DC power is not supplied due to repair work by an installer or service person, external DC power is supplied to the internal air circulation blower means. A direct current voltage in the same voltage range as the power supply system voltage of the power supply is applied, and the internal air circulation blower means can ensure operation when an external direct current power supply is applied. A conversion circuit is obtained.

  The present invention solves such a conventional problem, and this power system voltage can be automatically determined to cope with each of a plurality of power system voltages of the external DC power source. It is not necessary to prepare a heating device for the heating element housing box cooling device, there is no need to check the power system voltage before installation work without any mistakes in installation, and the internal air circulation blower means at the time of abnormal voltage of the external DC power supply In addition, the external AC power supply can be used as the power of the internal air circulation air supply means and the external air circulation air supply means while cutting off the application of the external DC power supply to the external air circulation air supply means, and normal operation can be recognized. An object of the present invention is to provide an AC / DC conversion circuit for a heating device for a heating element storage case cooling device that can confirm normal operation on the ground.

  According to the present invention, since the power supply system voltage can be automatically determined in order to cope with each of the plurality of power supply system voltages of the external DC power supply, a heating device for the heating element storage case cooling device is prepared for each power supply system voltage. It is unnecessary to check the power supply system voltage before the installation work without any mistakes in installation, and the external DC power supply to the internal air circulation blower means and the external air circulation blower means at the time of abnormal voltage of the external DC power supply Heating element housing that can be used as the power of the inside air circulating air blowing means and the outside air circulating air blowing means with an external AC power supply while cutting off the application, can recognize normal operation, and can confirm normal operation at a remote place An AC / DC conversion circuit of a heating device for a box cooling device can be provided.

The block diagram of the electric circuit of the heat generating body storage case cooling device of the example 1 of the present invention The circuit diagram which shows the structure of the input voltage detection means of the example 1 of a premise of this invention The block diagram of the electric circuit of the heat generating body storage case cooling device of Embodiment 1 of this invention Connection diagram showing connection of ground phase of external DC power supply The circuit diagram which shows the structure of the positive electrode side ground voltage detection means of Embodiment 1 of this invention The block diagram of the electric circuit of the heat generating body storage case cooling device of Embodiment 2 of this invention The circuit diagram which shows the structure of the negative electrode side ground voltage detection means of Embodiment 2 of this invention The block diagram of the electric circuit of the heat generating body storage case cooling device of Embodiment 3 of this invention The block diagram of the electric circuit of the heat generating body storage case cooling device of Embodiment 4 of this invention The block diagram of the electric circuit of the heat generating body storage case cooling device of Embodiment 5 of this invention Structural drawing showing the configuration of the heating element storage case cooling apparatus of Embodiment 5 of the present invention The circuit diagram which shows the structure of the temperature detection means of Embodiment 5 of this invention The block diagram of the electric circuit of the heat generating body storage case cooling device of Embodiment 6 of this invention The block diagram of the electric circuit of the heat generating body storage case cooling device of Embodiment 7 of this invention The circuit diagram which shows the structure of the negative electrode side ground voltage detection means of Embodiment 7 of this invention. The block diagram of the electric circuit of the heat generating body storage case cooling device of Embodiment 8 of this invention The block diagram of the electric circuit of the heat generating body storage case cooling device of Embodiment 9 of this invention Configuration diagram of conventional heating element storage box cooling device Structure diagram showing the configuration of a conventional heating element storage box cooling device The block diagram which shows the electric circuit of the conventional heating element storage box cooling device

According to the first aspect of the present invention, the heat exchange means for exchanging heat of the inside air in the heating element storage box with the heat of the outside air outside the heating element storage box, and taking in the inside air in the heating element storage box, An internal air circulation air passage that circulates and blows heat into the heating element storage box after heat exchange by the heat exchange means, an internal air circulation blowing means that circulates and blows the inside air, and takes in outside air outside the heating element storage box and the heat exchange means The outside air circulation air path that circulates and blows air outside the heating element storage box by exchanging heat with the heat of the inside air in the heating element storage box, and the outside air circulation blowing means that circulates and blows the outside air, and the inside air circulation air path. an electric heater for warming the heating element accommodating box making comprising, a control device for operating the external air circulating blower means and said inside air circulation blower unit, and an external DC power source to power the inside air circulating blower means and the outside air circulating blower means Power source for the electric heater And some external AC power source, said a commercial power transformer that is connected to an external AC power source having a plurality of taps, the DC voltage output obtained from said commercial power source transformer so as to conform to the power supply system voltage of the external DC power supply in AC-DC converter circuit of the origination heat medium storage box making the cooling apparatus for a heating device and a tap switching unit for switching a plurality of taps, the external DC power supply is a ground phase positive-side potential is connected to earth ground The control device is provided with one of a high-voltage power system voltage and a low-voltage power system voltage serving as a ground phase connected to the earth ground, and the control device includes the earth ground and the positive-side potential or the negative-side potential. by detecting the determined power supply system voltage of the external DC power supply, which is characterized by operating the tap switching unit, control unit, the external DC power supply When the power supply transformer with taps is automatically switched by judging the source system voltage and the heating element storage box is warmed, the external DC power supply is supplied to the internal air circulation blower means even when the external DC power is not supplied. A direct-current voltage in the same voltage range as the system voltage is applied, and the inside-air circulating air blowing means has an effect of ensuring the operation when an external direct-current power supply is applied.

The invention according to claim 2 of the present invention is characterized by operating a plurality of switch elements of tap switching means connected to a tap provided in a primary winding of a commercial power transformer. Since a tap-mounted commercial power transformer with a tap is used, tap switching can be performed automatically using tap switching means with a small current capacity, so that the external DC power is not supplied when the heating element storage box is warmed. However, a DC voltage in the same voltage range as the power supply system voltage of the external DC power supply is applied to the inside air circulation blowing means, and the inside air circulation blowing means can ensure the operation when the external DC power supply is applied. Have

The invention according to claim 3 of the present invention is characterized by operating a plurality of switch elements of tap switching means connected to a tap provided in a secondary winding of a commercial power transformer. Since a tap-mounted commercial power transformer with a tap is used, tap switching can be performed automatically using tap switching means with a low withstand voltage, so that the external DC power is not supplied when the heating element storage box is warmed. However, a DC voltage in the same voltage range as the power supply system voltage of the external DC power supply is applied to the inside air circulation blowing means, and the inside air circulation blowing means can ensure the operation when the external DC power supply is applied. Have

According to a fourth aspect of the present invention, there is provided a rotational speed detecting means for detecting the rotational speed of a fan motor which is an internal air circulating air blowing means, no external DC power supply is supplied, and the internal air circulating air blowing means is powered by an external AC power supply. Is set so that the output of the tapped commercial power transformer is on the low pressure side, and the rotation speed detected by the rotation speed detection means of the inside air circulation blower means is the desired rotation. When the number does not reach the number, the power supply system voltage of the external DC power supply is determined to be on the high voltage side, and the tap switching means is switched so that the output of the tapped commercial power transformer is on the high voltage side. Compare the rotation speed of the internal air circulating air blowing means detected by the rotation speed detection means with a predetermined rotation speed and judge the power supply system voltage of the external DC power supply. Since the tap switching of the commercial power transformer is automatically performed, even if the external DC power is not supplied when the heating element storage case is warmed, the internal air circulation blower has the same voltage range as the power system voltage of the external DC power supply. A direct current voltage is applied, and the inside air circulating air blowing means can be operated at a rotational speed similar to the rotational speed when an external direct current power source is applied.

The invention according to claim 5 of the present invention includes current detection means connected in series to the input portion of the inside air circulating air blowing means, and there is no supply of external DC power, and the power of the inside air circulating air blowing means is supplied by the external AC power source. The tap switching means is set so that the output of the tapped commercial power transformer is on the low voltage side, and if the current value detected by the current detection means does not reach a desired value, the external DC The power supply system voltage of the power source is determined to be on the high voltage side, and the tap switching unit is switched so that the output of the tapped commercial power transformer is on the high voltage side, which is detected by the current detection unit By comparing the value of the current flowing through the inside air circulation blower with the desired value set in advance and judging the power system voltage of the external DC power supply, the tap switching of the commercial power transformer with tap is automatically performed. Therefore, when the heating element storage case is warmed, even if the external DC power is not supplied, a DC voltage in the same voltage range as the power supply system voltage of the external DC power supply is applied to the internal air circulation blowing means, and the internal air circulation The air blowing means has an effect of ensuring the operation when the external DC power supply is applied.

According to a sixth aspect of the present invention, there is provided an electric heater provided with a temperature detecting means for detecting the temperature of the inside air circulated in the inside air circulation air passage, without being supplied with an external DC power supply, and for heating the heating element storage case. When the external AC power supply is energized and the power of the internal air circulation blower means is supplied by the external AC power supply, the tap switching means is set so that the output of the commercial power transformer with tap is on the low pressure side, and the temperature detection means When the temperature detected by the above becomes a desired temperature or less, it is determined that the power supply system voltage of the external DC power supply is on the high voltage side, and the tap switching means is connected to the high voltage side output of the commercial power transformer with tap. When the heating element storage box is warmed, the temperature of the inside air flowing in the inside air circulation air passage detected by the temperature detecting means is compared with a preset temperature. Since the tap switching of the commercial power transformer with tap is automatically performed by judging the power supply system voltage of the external DC power supply, even when the external DC power is not supplied, the internal air circulation blowing means is the same as the power supply system voltage of the external DC power supply. A direct current voltage in a voltage range is applied, and the inside air circulating air blowing means has an operation capable of ensuring the operation when an external direct current power source is applied.

According to a seventh aspect of the present invention, there is provided an on / off means for applying an external DC power source to the inside air circulating air blowing means and the outside air circulating air blowing means, and an input voltage detecting means for detecting an input voltage of the external DC power source. After the power supply system voltage of the external DC power supply is once determined by the above, when the input voltage of the external DC power supply does not match the preset power supply system voltage of the external DC power supply, the power on / off means is opened. The power to the inside air circulating air blowing means and the outside air circulating air blowing means is supplied by an external AC power source, and the input voltage of the external DC power source is determined as an abnormal voltage by the input voltage detecting means. In this case, the power on / off means is opened to block the application of the external DC voltage to the inside air circulating air blowing means and the outside air circulating air blowing means, and the input voltage detecting means detects it. In addition, since the tap switching of the commercial power transformer with tap was automatically performed so as to match the power supply system voltage once determined from the input voltage of the external DC power supply, the same voltage range as the power supply system voltage of the external DC power supply was obtained. A direct current voltage is applied to the inside air circulating air blowing means and the outside air circulating air blowing means, and the inside air circulating air blowing means and the outside air circulating air blowing means have an action capable of ensuring an operation when an external direct current power source is applied.

The invention according to claim 8 of the present invention is provided with power on / off means for applying an external DC power source to the inside air circulating air blowing means and the outside air circulation air blowing means, and detects a potential difference between the positive side potential of the external DC power source and the ground. The power supply system voltage of the external DC power supply is temporarily determined by the positive electrode-to-ground voltage detection means, and the negative electrode-to-ground voltage detection means for detecting the potential difference between the negative electrode side potential of the external DC power supply and the ground, and the external When the input voltage of the DC power supply does not match the preset power supply system voltage of the external DC power supply, the power on / off means is opened, and the power to the inside air circulation blowing means and the outside air circulation blowing means is tapped. The tap switching means is switched so that the output of the attached commercial power transformer becomes the power system voltage of the external DC power supply once determined, and the power is supplied from the external AC power supply. If the input voltage of the external DC power supply is determined as an abnormal voltage by the positive side ground voltage detection means and the negative side ground voltage detection means, the power on / off means is opened to open the internal air circulation blower and the external air circulation blower The application of the external DC voltage to the device is cut off, and the potential difference between the positive electrode side potential of the external DC power source and the ground detected by the positive electrode side ground voltage detection unit and the negative electrode side ground voltage detection unit, and the external DC By automatically switching the tap of the commercial power transformer with tap so as to match the power supply system voltage of the external DC voltage once determined between the negative potential of the power supply and the ground, the power supply of the external DC power supply A DC voltage in the same voltage range as the system voltage is applied to the inside air circulating air blowing means and the outside air circulating air blowing means, and the inside air circulating air blowing means and the outside air Circulating blower means has the effect that it is possible to ensure an operation when the external DC power supply is applied.

The invention according to claim 9 of the present invention is characterized by comprising light emitting display means or sound generating means for notifying the result of judging the power supply system voltage of the external power supply voltage. As a result of determining the power supply system voltage or the abnormal voltage of the external power supply voltage can be notified by the light emitting display means or the sound generation means, the installer or serviceman can supply the power supply system voltage of the external power supply voltage or the external power supply. By recognizing that the voltage is an abnormal voltage, even if the external DC power is not supplied due to repair work by an installer or service person, the direct current in the same voltage range as the power system voltage of the external DC power supply is supplied to the internal air circulation blower means. A voltage is applied, and the inside air circulating air blowing means has an operation capable of ensuring the operation when an external DC power supply is applied.

The invention according to claim 10 of the present invention is characterized by comprising a communication means for notifying an operation center for remotely monitoring a result of judging a power system voltage of the external power supply voltage. As a result of determining the power supply system voltage or information that the external power supply voltage is an abnormal voltage can be included in the communication, the power supply system voltage of the external power supply voltage or the external By recognizing that it is an abnormal voltage of the power supply voltage, even if the external DC power is not supplied due to repair work by an installer or service person, the same voltage as the power system voltage of the external DC power supply is supplied to the internal air circulation blower means A DC voltage in a range is applied, and the inside air circulation blower means has an action that can ensure operation when an external DC power supply is applied. That.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

( Assumption example 1)
The same parts as those in the conventional example are designated by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 1 and FIG. 2, the cooling device 102 that cools the heating element storage box 101 exchanges heat between the internal air in the heating element storage box 101 and the outside air outside the heating element storage box 101. An internal air circulation air passage 104 that takes in the internal air of the heat exchanger 103 as the heat exchange means and the heating element storage box 101 and exchanges heat with the outside air by the heat exchanger 103 and blows the air into the heating element storage box 101, and blows the internal air An outside air circulating motor that takes in outside air from the heating element storage box 101 and exchanges heat with the inside air by the heat exchanger 103 and blows it outside the heating element storage box 101. An outside air fan motor 106 serving as an outside air circulating air blowing means for circulating and blowing outside air, and a non-volatile operating the inside air fan motor 105 and the outside air fan motor 106 A control device 107 equipped with a microcomputer 2 having a built-in memory 1 is provided. An external DC power supply 108, which is a main power source of the cooling device 102, is supplied from the heating element storage case 101, and the inside air fan motor 105 and the outside air The power of the fan motor 106 is connected to the inside air fan motor 105 and the outside air fan motor 106 via the first backflow prevention element 109.

  Further, the heating device 110 for the heating element storage case cooling device that warms the inside air of the heating element storage case 101 includes an electric heater 111 in the inside air circulation air passage 104, and supplies the electric power to the electric heater 111. The electric heater 111 is connected to an external AC power source 112 supplied from the box 101 via a contact of a relay 113 as voltage applying means driven by the control device 107. One phase of the supplied external AC power source 112 is a 1C contact type tap switching relay 4 as a switch element as a tap switching means for automatically switching a plurality of taps provided in the primary winding of the tapped commercial power transformer 3. The normally open terminal of the tap switching relay 4 is connected to an intermediate tap b provided in the primary winding of the tapped commercial power transformer 3, and the normally closed terminal of the tap switching relay 4 is The other phase of the external AC power source 112 is connected to the common terminal c of the primary winding of the tapped commercial power transformer 3. A diode bridge 115 for full-wave rectification of the output voltage is connected to the secondary winding of the tapped power transformer 3, and the DC voltage V2 smoothed by the smoothing capacitor 116 is obtained. The inside air fan motor 105 and the control device 107 To the second backflow prevention element 117. The control device 107 includes a first resistor 5, a second resistor 6, and the microcomputer 2 as input voltage detection means of the external DC power supply 108, and a tap switching relay 4 according to a command from the microcomputer 2. Is connected to a relay drive circuit 7 for driving the.

  Here, when the external AC power supply 112 is input between the terminal tap a and the common terminal c of the commercial power transformer 3 with tap, the DC voltage V2 is the power system voltage of the input DC voltage V1 of the external DC power supply 108. The external AC power source 112 is connected between the intermediate tap b and the common terminal c of the tapped commercial power transformer 3 so as to be in the same voltage range (for example, DC 20 V to DC 29 V) as the low voltage (for example, DC 24 V). When input, the DC voltage V2 is in the same voltage range (for example, DC 38.9V to DC 57.6V) as the high voltage (for example, DC 48V) of the power supply system voltage of the input DC voltage V1 of the external DC power source 108. Thus, the turns ratio of the primary winding and the secondary winding of the commercial power transformer 3 with a tap is adjusted.

  In the above configuration, when the external DC power supply 108 is turned on, the input DC voltage V1 of the external DC power supply 108 is divided by the first resistor 5 and the second resistor 6, and the analog input terminal AIN of the microcomputer 2 is obtained. In this microcomputer 2, a timer is run, and after a few seconds (for example, 3 seconds), the external DC power supply 108 supplied from the heating element storage box 101 is stabilized and the input DC voltage V1 is determined to be stable. If the voltage exceeds the first threshold (for example, the input DC voltage V1 is equivalent to DC29V), the power supply system voltage of the external DC power supply 108 is determined to be on the high voltage side (for example, DC48V), and the tap switching relay 4 is immediately turned on. The relay drive circuit 7 is instructed to switch the contact of the tap switching relay 4 to the normally open side, and the tapped commercial power transformer 3 The circuit is switched to the intermediate tap b of the winding, and the output voltage on the secondary side of the tapped commercial power transformer 3 is increased by the turn ratio of the primary winding to the secondary winding, and the DC voltage V2 is the power supply of the external DC power supply 108. The voltage range (for example, DC 38.9V to DC 57.6V) is the same as the high voltage side (for example, DC 48V) of the system voltage. The determination information that the power supply system voltage of the external DC power supply 108 is on the high voltage side is stored in the nonvolatile memory 1 provided in the microcomputer 2, and the external DC power supply 108 is again connected when the external DC power supply 108 is turned on again. The power supply system voltage is determined. That is, when the external DC power supply 108 and the external AC power supply 112 are not supplied and only the external AC power supply 112 is turned on again, the power supply system of the external DC power supply 108 stored in the nonvolatile memory 1 is used. Based on the determination information that the voltage is on the high voltage side, the relay drive circuit 7 is instructed to immediately turn on the tap switching relay 4, and the contact of the tap switching relay 4 is switched to the normally open side. The circuit is switched to the intermediate tap b of the primary winding of the primary winding, and the output voltage on the secondary side of the tapped commercial power transformer 3 is increased by the turn ratio of the primary winding to the secondary winding, and the DC voltage V2 is an external DC power supply. The voltage range (for example, DC 38.9V to DC 57.6V) is the same as the high voltage side (for example, DC 48V) of the power supply system voltage 108. The microcomputer 2 monitors the divided voltage of the input DC voltage V1 and confirms the content of driving the tap switching relay 4 to be turned on and the information in the built-in nonvolatile memory 1 when the first threshold value is exceeded. Or programmed to rewrite information.

  Accordingly, the DC voltage V2 generated by the external AC power supply 112 is automatically the same as the high voltage side of the power supply system voltage of the external DC power supply 108 (for example, DC48V), so that the supply is performed even when the external DC power supply 108 is not supplied. The inside air fan motor 105 can operate at the same rotational speed as that when the external DC power supply 108 is supplied.

  In this way, since the tap switching of the commercial power transformer 3 with a tap provided with a tap is automatically performed on the winding of the commercial power transformer, the turn ratio of the primary winding to the secondary winding of the commercial power transformer 3 with a tap is set. Accordingly, since the output voltage of the commercial power transformer 3 with a tap can be transformed, the DC voltage V2 can be the same as the power system voltage of the external DC power supply 108, so when heating the heating element storage case 101, Even if the external DC power 108 is not supplied, the same DC voltage as that of the external DC power supply 108 is applied to the indoor air fan motor 105. Therefore, the internal air fan motor 105 rotates when the external DC power supply 108 is applied. It can be operated at the same number of rotations as the number, and the performance as the circulating air blowing means can be ensured.

In the present assumption example for convenience of explanation, has been described tap tapped commercial power transformer 3 as two, may be three or more it is of course. Although the description has been given assuming that the tap is provided in the primary winding of the commercial power transformer with a tap, there is no difference in effect even if the tap is provided in the secondary winding. The description is common to all the following embodiments. Further, although the microcomputer 2 has been described as a type in which the nonvolatile memory 1 is built, even if the nonvolatile memory 1 is provided outside the microcomputer 2, there is no difference in operational effects.

(Embodiment 1 )
The same parts as those in the conventional example and the precondition example 1 are denoted by the same reference numerals and detailed description thereof is omitted.

  As shown in FIGS. 3, 4, and 5, the cooling device 102 that cools the heating element storage box 101 divides the heat of the inside air in the heating element storage box 101 and the heat of the outside air outside the heating element storage box 101. A heat exchanger 103 as heat exchange means for heat exchange and an internal air circulation air passage 104 that takes in the internal air of the heating element storage box 101 and exchanges heat with the outside air in the heat exchanger 103 and blows air into the heating element storage box 101; An inside air fan motor 105 is provided as an inside air circulation blowing means for blowing inside air, takes in outside air from the heating element storage box 101, exchanges heat with the inside air by the heat exchanger 103, and blows it outside the heating element storage box 101. An outside air circulation air passage, an outside air fan motor 106 serving as an outside air circulation blowing means for circulating outside air, and the inside air fan motor 105 and the outside air fan motor 106 are operated. A control device 107 equipped with a microcomputer 2 having a built-in volatile memory 1 is provided, and an external DC power supply 108 as a main power source of the cooling device 102 is supplied from the heating element storage box 101, and the inside air fan motor 105 and the The outside air fan motor 106 is connected to the inside air fan motor 105 and the outside air fan motor 106 via the first backflow prevention element 109 as power of the outside air fan motor 106, and the cooling device 102 is provided with a grounding provided as a protective ground. Terminal 8 is connected to earth ground 9. Further, as shown in FIG. 4A, the external DC power supply 108 has a high-voltage (for example, DC48V) power supply system voltage and a negative-side potential that are connected to the earth ground 9. There is a low-voltage (for example, DC 24V) power supply system voltage that is connected to the ground phase.

  Further, the heating device 110 for the heating element storage case cooling device that warms the inside air of the heating element storage case 101 includes an electric heater 111 in the inside air circulation air passage 104, and supplies the electric power to the electric heater 111. The electric heater 111 is connected to an external AC power source 112 supplied from the box 101 via a contact of a relay 113 as voltage applying means driven by the control device 107. One phase of the supplied external AC power source 112 is a 1C contact type tap switching relay 4 as a switch element as a tap switching means for automatically switching a plurality of taps provided in the primary winding of the tapped commercial power transformer 3. The normally open terminal of the tap switching relay 4 is connected to an intermediate tap b provided in the primary winding of the tapped commercial power transformer 3, and the normally closed terminal of the tap switching relay 4 is The other phase of the external AC power source 112 is connected to the common terminal c of the primary winding of the tapped commercial power transformer 3. A diode bridge 115 for full-wave rectification of the output voltage is connected to the secondary winding of the tapped power transformer 3, and the DC voltage V2 smoothed by the smoothing capacitor 116 is obtained. The inside air fan motor 105 and the control device 107 To the second backflow prevention element 117. The control device 107 includes a third resistor 11 serving as a positive-side ground-to-ground voltage detecting means for detecting a positive-side ground-to-ground voltage V3 as a potential difference between the positive-side potential terminal 10a of the external DC power supply 108 and the ground terminal 8. And a fourth resistor 12 and the microcomputer 2 are connected to a relay drive circuit 7 that drives the tap switching relay 4 according to a command from the microcomputer 2.

  In the above configuration, when the external DC power supply 108 is turned on, the positive-side ground voltage V3 between the positive-side potential terminal 10a and the ground terminal 8 of the external DC power supply 108 is changed between the third resistor 11 and the fourth resistor. A voltage is divided by the resistor 12 and applied to the analog input terminal AIN of the microcomputer 2. In the microcomputer 2, an external DC power supply 108 is supplied from the heating element storage box 101 a few seconds (for example, 3 seconds) after running a timer. In order to determine the positive-side voltage V3 as being stable, the external DC power supply 108 is positive if the AIN voltage is below a second threshold value (for example, the positive-side voltage V3 is equivalent to 1.0 V DC). The side potential is determined to be the high-voltage side (for example, DC 48V) which is the ground phase, and the relay circuit 7 is instructed to immediately turn on the tap switching relay 4, and the tap switching relay 4 is switched to the normally open side, and the circuit is switched to the intermediate tap b of the primary winding of the commercial power transformer 3 with the tap so that the secondary output voltage of the commercial power transformer 3 with the tap is the primary winding-2. The DC voltage V2 becomes a voltage range (for example, DC 38.9V to DC 57.6V) that is the same as the high voltage side (for example, DC 48V) of the power supply system voltage of the external DC power supply 108 due to the turn ratio of the next winding. The determination information that the power supply system voltage of the external DC power supply 108 is on the high voltage side is stored in the nonvolatile memory 1 provided in the microcomputer 2, and the external DC power supply 108 is again connected when the external DC power supply 108 is turned on again. The power supply system voltage is determined. That is, when the external DC power supply 108 and the external AC power supply 112 are not supplied and only the external AC power supply 112 is turned on again, the power supply system of the external DC power supply 108 stored in the nonvolatile memory 1 is used. Based on the determination information that the voltage is on the high voltage side, the relay drive circuit 7 is instructed to immediately turn on the tap switching relay 4, and the contact of the tap switching relay 4 is switched to the normally open side. The circuit is switched to the intermediate tap b of the primary winding of the primary winding, and the output voltage on the secondary side of the tapped commercial power transformer 3 is increased by the turn ratio of the primary winding to the secondary winding, and the DC voltage V2 is external DC The voltage range (for example, DC 38.9V to DC 57.6V) is the same as the high voltage side (for example, DC 48V) of the power system voltage of the power source 108. The microcomputer 2 monitors the divided voltage of the ground-to-ground potential V3, and confirms the content of driving the tap switching relay 4 to be turned on and the information in the built-in nonvolatile memory 1 when the voltage falls below the second threshold value. Or programmed to rewrite information.

  Accordingly, the DC voltage V2 generated by the external AC power supply 112 is automatically the same as the high voltage side of the power supply system voltage of the external DC power supply 108 (for example, DC48V), so that the supply is performed even when the external DC power supply 108 is not supplied. The inside air fan motor 105 can operate at the same rotational speed as that when the external DC power supply 108 is supplied.

  In this way, since the tap switching of the commercial power transformer 3 with a tap provided with a tap is automatically performed on the winding of the commercial power transformer, the turn ratio of the primary winding to the secondary winding of the commercial power transformer 3 with a tap is set. Accordingly, since the output voltage of the commercial power transformer 3 with a tap can be transformed, the DC voltage V2 can be the same as the power system voltage of the external DC power supply 108, so when heating the heating element storage case 101, Even if the external DC power 108 is not supplied, the same DC voltage as that of the external DC power supply 108 is applied to the indoor air fan motor 105. Therefore, the internal air fan motor 105 rotates when the external DC power supply 108 is applied. It can be operated at the same number of rotations as the number, and the performance as the circulating air blowing means can be ensured.

  Although the microcomputer 2 has been described as a type in which the nonvolatile memory 1 is built, even if the nonvolatile memory 1 is provided outside the microcomputer 2, there is no difference in operational effects.

(Embodiment 2 )
Conventional omitted subjected detailed description of the same numbers are attached to form 1, the same parts of the premises Example 1 and.

  As shown in FIGS. 6 and 7, the cooling device 102 that cools the heating element storage box 101 exchanges heat between the heat of the inside air inside the heating element storage box 101 and the heat of the outside air outside the heating element storage box 101. An internal air circulation air passage 104 that takes in the internal air of the heat exchanger 103 as the heat exchange means and the heating element storage box 101 and exchanges heat with the outside air by the heat exchanger 103 and blows the air into the heating element storage box 101, and blows the internal air An outside air circulating motor that takes in outside air from the heating element storage box 101 and exchanges heat with the inside air by the heat exchanger 103 and blows it outside the heating element storage box 101. An outside air fan motor 106 serving as an outside air circulating air blowing means for circulating and blowing outside air, and a non-volatile operating the inside air fan motor 105 and the outside air fan motor 106 A control device 107 equipped with a microcomputer 2 having a built-in memory 1 is provided. An external DC power supply 108, which is a main power source of the cooling device 102, is supplied from the heating element storage case 101, and the inside air fan motor 105 and the outside air The power of the fan motor 106 is connected to the inside air fan motor 105 and the outside air fan motor 106 via the first backflow prevention element 109, and the cooling device 102 is provided with a ground terminal 8 provided as a protective ground. Is connected to the earth ground 9. The external DC power supply 108 has a high-voltage (for example, DC48V) power supply system voltage whose positive side potential is the ground phase and a low-voltage (for example, DC24V) power system voltage whose negative side potential is the ground phase.

  Further, the heating device 110 for the heating element storage case cooling device that warms the inside air of the heating element storage case 101 includes an electric heater 111 in the inside air circulation air passage 104, and supplies the electric power to the electric heater 111. The electric heater 111 is connected to an external AC power source 112 supplied from the box 101 via a contact of a relay 113 as voltage applying means driven by the control device 107. One phase of the supplied external AC power source 112 is a 1C contact type tap switching relay 4 as a switch element as a tap switching means for automatically switching a plurality of taps provided in the primary winding of the tapped commercial power transformer 3. The normally open terminal of the tap switching relay 4 is connected to an intermediate tap b provided in the primary winding of the tapped commercial power transformer 3, and the normally closed terminal of the tap switching relay 4 is The other phase of the external AC power source 112 is connected to the common terminal c of the primary winding of the tapped commercial power transformer 3. A diode bridge 115 for full-wave rectification of the output voltage is connected to the secondary winding of the tapped power transformer 3, and the DC voltage V2 smoothed by the smoothing capacitor 116 is obtained. The inside air fan motor 105 and the control device 107 To the second backflow prevention element 117. The control device 107 includes a fifth resistor 13 as a negative electrode-to-ground voltage detecting means for detecting a negative electrode-to-ground voltage V4 as a potential difference between the negative electrode-side potential terminal 10b of the external DC power supply 108 and the ground terminal 8. And a sixth resistor 14 and the microcomputer 2 are connected to a relay drive circuit 7 that drives the tap switching relay 4 according to a command from the microcomputer 2.

  In the above configuration, when the external DC power supply 108 is turned on, the negative-side ground voltage V4 between the negative-side potential terminal 10b and the ground terminal 8 of the external DC power supply 108 is changed to the fifth resistor 13 and the sixth resistor. A voltage is divided by the resistor 14 and applied to the analog input terminal AIN of the microcomputer 2. In the microcomputer 2, an external DC power supply 108 is supplied from the heating element storage box 101 a few seconds (for example, 3 seconds) after running a timer. In order to determine the negative-side voltage V4 as stable, the external DC power supply 108 is positive if the AIN voltage exceeds a third threshold value (for example, the negative-side voltage V4 corresponds to DC 1.0 V). It is determined that the side potential is the high voltage side (for example, DC 48 V) that is the active phase, and the relay switching circuit 4 is instructed to immediately turn on the tap switching relay 4, and the tap switching relay 4 is switched to the normally open side, and the circuit is switched to the intermediate tap b of the primary winding of the commercial power transformer 3 with the tap so that the secondary output voltage of the commercial power transformer 3 with the tap is the primary winding-2. The DC voltage V2 becomes a voltage range (for example, DC 38.9V to DC 57.6V) that is the same as the high voltage side (for example, DC 48V) of the power supply system voltage of the external DC power supply 108 due to the turn ratio of the next winding. The determination information that the power supply system voltage of the external DC power supply 108 is on the high voltage side is stored in the nonvolatile memory 1 provided in the microcomputer 2, and the external DC power supply 108 is again connected when the external DC power supply 108 is turned on again. The power supply system voltage is determined. That is, when the external DC power supply 108 and the external AC power supply 112 are not supplied and only the external AC power supply 112 is turned on again, the power supply system of the external DC power supply 108 stored in the nonvolatile memory 1 is used. Based on the determination information that the voltage is on the high voltage side, the relay drive circuit 7 is instructed to immediately turn on the tap switching relay 4, and the contact of the tap switching relay 4 is switched to the normally open side. The circuit is switched to the intermediate tap b of the primary winding of the primary winding, and the output voltage on the secondary side of the tapped commercial power transformer 3 is increased by the turn ratio of the primary winding to the secondary winding, and the DC voltage V2 is external DC The voltage range (for example, DC 38.9V to DC 57.6V) is the same as the high voltage side (for example, DC 48V) of the power system voltage of the power source 108. The microcomputer 2 monitors the divided voltage of the ground-to-ground potential V4, and confirms the content of driving the tap switching relay 4 to be turned on and the information in the built-in nonvolatile memory 1 when the voltage falls below the third threshold value. Or programmed to rewrite information.

  Accordingly, the DC voltage V2 generated by the external AC power supply 112 is automatically the same as the high voltage side of the power supply system voltage of the external DC power supply 108 (for example, DC48V), so that the supply is performed even when the external DC power supply 108 is not supplied. The inside air fan motor 105 can operate at the same rotational speed as that when the external DC power supply 108 is supplied.

  In this way, since the tap switching of the commercial power transformer 3 with a tap provided with a tap is automatically performed on the winding of the commercial power transformer, the turn ratio of the primary winding to the secondary winding of the commercial power transformer 3 with a tap is set. Accordingly, since the output voltage of the commercial power transformer 3 with a tap can be transformed, the DC voltage V2 can be the same as the power system voltage of the external DC power supply 108, so when heating the heating element storage case 101, Even if the external DC power 108 is not supplied, the same DC voltage as that of the external DC power supply 108 is applied to the indoor air fan motor 105. Therefore, the internal air fan motor 105 rotates when the external DC power supply 108 is applied. It can be operated at the same number of rotations as the number, and the performance as the circulating air blowing means can be ensured.

  Although the microcomputer 2 has been described as a type in which the nonvolatile memory 1 is built, even if the nonvolatile memory 1 is provided outside the microcomputer 2, there is no difference in operational effects.

(Embodiment 3 )
The same parts as those in the conventional example, the premise example 1, the first embodiment, and the second embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 8, the cooling device 102 for cooling the heating element storage case 101 is a heat exchange means for exchanging heat between the internal air in the heating element storage case 101 and the heat of the outside air outside the heating element storage case 101. The heat exchanger 103 and the heating element storage box 101 are taken in, and the heat exchanger 103 exchanges heat with the outside air to blow the air into the heating element storage box 101, and the inside air circulation for blowing the inside air An outside air circulation air passage that includes an inside air fan motor 105 as a blowing means, takes outside air of the heating element storage box 101 and exchanges heat with the inside air by the heat exchanger 103, and blows the air outside the heating element storage box 101; Equipped with an outside air fan motor 106 as outside air circulating air blowing means for circulating outside air, and a microcomputer 2 that operates the inside air fan motor 105 and the outside air fan motor 106 A control device 107, and an external DC power source 108, which is a main power source of the cooling device 102, is supplied from the heating element housing box 101, and the first air motor 105 and the outside air fan motor 106 are powered by the first power source. Are connected to the inside air fan motor 105 and the outside air fan motor 106 via the backflow prevention element 109. The control device 107 includes a rotation speed detection circuit 15 as rotation speed detection means for detecting the rotation speed of the inside air fan motor 105.

  Further, the heating device 110 for the heating element storage case cooling device that warms the inside air of the heating element storage case 101 includes an electric heater 111 in the inside air circulation air passage 104, and supplies the electric power to the electric heater 111. The electric heater 111 is connected to an external AC power source 112 supplied from the box 101 via a contact of a relay 113 as voltage applying means driven by the control device 107. One phase of the supplied external AC power source 112 is a 1C contact type tap switching relay 4 as a switch element as a tap switching means for automatically switching a plurality of taps provided in the primary winding of the tapped commercial power transformer 3. The normally open terminal of the tap switching relay 4 is connected to an intermediate tap b provided in the primary winding of the tapped commercial power transformer 3, and the normally closed terminal of the tap switching relay 4 is The other phase of the external AC power source 112 is connected to the common terminal c of the primary winding of the tapped commercial power transformer 3. A diode bridge 115 for full-wave rectification of the output voltage is connected to the secondary winding of the tapped power transformer 3, and the DC voltage V2 smoothed by the smoothing capacitor 116 is obtained. The inside air fan motor 105 and the control device 107 To the second backflow prevention element 117.

  In the above configuration, when the external DC power supply 108 is not supplied and only the external AC power supply 112 is supplied, the contact of the tap switching relay 4 is normally closed and the primary side of the tapped commercial power transformer 3 is connected. Since the external AC power supply 112 is supplied to the external DC power supply 112, the DC voltage V2 has a voltage range (for example, DC20V to DC29V) in which the power supply system voltage of the external DC power supply 108 is the same as a low voltage (for example, DC24V). Then, the inside air fan motor 105 is driven. When the rotational speed detection circuit 15 detects the rotational speed N1 of the internal air fan motor 105 and the rotational speed N1 is lower than the predetermined rotational speed NS, the internal air fan motor 105 can be sufficiently rotated. The relay drive circuit 7 determines that the tap switching relay 4 is immediately turned on, assuming that the power supply system voltage of the external DC power supply 108 is high (for example, DC 48V). , The contact of the tap switching relay 4 is switched to the normally open side, the circuit is switched to the intermediate tap b of the primary winding of the tapped commercial power transformer 3, and the output on the secondary side of the tapped commercial power transformer 3 The voltage increases due to the turn ratio of the primary winding to the secondary winding, and the DC voltage V2 is a high voltage (for example, DC) of the power supply system voltage of the external DC power supply 108. 8V) the same as the voltage range (e.g., DC38.9V~DC57.6V) become. The microcomputer 2 compares the rotational speed N1 obtained by the rotational speed detection circuit 15 with a preset rotational speed NS. When the rotational speed N1 falls below the set rotational speed NS, the microcomputer 2 It is programmed to be driven to turn on.

  Therefore, since the DC voltage V2 generated by the external AC power supply 112 is automatically the same as the high voltage (eg, DC 48V) of the power supply system voltage of the external DC power supply 108, the supply is performed even when the external DC power supply 108 is not supplied. The inside air fan motor 105 can operate at the same rotational speed as when the external DC power supply 108 is supplied.

  In this way, since the tap switching of the commercial power transformer 3 with a tap provided with a tap is automatically performed on the winding of the commercial power transformer, the turn ratio of the primary winding to the secondary winding of the commercial power transformer 3 with a tap is set. Accordingly, since the output voltage of the commercial power transformer 3 with a tap can be transformed, the DC voltage V2 can be the same as the power system voltage of the external DC power supply 108, so when heating the heating element storage case 101, Even if the external DC power 108 is not supplied, the same DC voltage as that of the external DC power supply 108 is applied to the indoor air fan motor 105. Therefore, the internal air fan motor 105 rotates when the external DC power supply 108 is applied. It can be operated at the same number of rotations as the number, and the performance as the circulating air blowing means can be ensured.

(Embodiment 4 )
The same parts as those in the conventional example, the premise example 1, and the first to third embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 9, the cooling device 102 for cooling the heating element storage case 101 is a heat exchange means for exchanging heat between the internal air in the heating element storage case 101 and the heat of the outside air outside the heating element storage case 101. The heat exchanger 103 and the heating element storage box 101 are taken in, and the heat exchanger 103 exchanges heat with the outside air to blow the air into the heating element storage box 101, and the inside air circulation for blowing the inside air An outside air circulation air passage that includes an inside air fan motor 105 as a blowing means, takes outside air of the heating element storage box 101 and exchanges heat with the inside air by the heat exchanger 103, and blows the air outside the heating element storage box 101; Equipped with an outside air fan motor 106 as outside air circulating air blowing means for circulating outside air, and a microcomputer 2 that operates the inside air fan motor 105 and the outside air fan motor 106 A control device 107, and an external DC power source 108, which is a main power source of the cooling device 102, is supplied from the heating element housing box 101, and the first air motor 105 and the outside air fan motor 106 are powered by the first power source. Are connected to the outside air fan motor 106 via the backflow prevention element 109 and to the inside air fan motor 105 via the shunt resistor 16 as current detecting means. The control device 107 includes a current output circuit 17 as current detection means for detecting a current value flowing through the inside air fan motor 105.

  Further, the heating device 110 for the heating element storage case cooling device that warms the inside air of the heating element storage case 101 includes an electric heater 111 in the inside air circulation air passage 104, and supplies the electric power to the electric heater 111. The electric heater 111 is connected to an external AC power source 112 supplied from the box 101 via a contact of a relay 113 as voltage applying means driven by the control device 107. One phase of the supplied external AC power source 112 is a 1C contact type tap switching relay 4 as a switch element as a tap switching means for automatically switching a plurality of taps provided in the primary winding of the tapped commercial power transformer 3. The normally open terminal of the tap switching relay 4 is connected to an intermediate tap b provided in the primary winding of the tapped commercial power transformer 3, and the normally closed terminal of the tap switching relay 4 is The other phase of the external AC power source 112 is connected to the common terminal c of the primary winding of the tapped commercial power transformer 3. A diode bridge 115 for full-wave rectification of the output voltage is connected to the secondary winding of the tapped power transformer 3, and the DC voltage V2 smoothed by the smoothing capacitor 116 is obtained. It is connected to the control device 107 and is connected to the inside air fan motor 105 via the shunt resistor 16.

  In the above configuration, when the external DC power supply 108 is not supplied and only the external AC power supply 112 is supplied, the contact of the tap switching relay 4 is normally closed and the primary side of the tapped commercial power transformer 3 is connected. Since the external AC power supply 112 is supplied to the external DC power supply 112, the DC voltage V2 is in a voltage range (for example, DC20V to DC29V) in which the power supply system voltage of the external DC power supply 108 is the same as the low voltage side (for example, DC24V). Then, the inside air fan motor 105 is driven. When the current detection circuit 17 detects the current I1 flowing through the indoor air fan motor 105 through the shunt resistor 16, and the rotational speed I1 is lower than the preset current value IS, the internal air fan motor 105 is It is determined that the internal air fan motor 105 is not fully rotated, and the power for operating the internal air fan motor 105 is determined to immediately turn on the tap switching relay 4 assuming that the power supply system voltage of the external DC power supply 108 is high (for example, DC 48V). The relay drive circuit 7 is commanded, the contact of the tap switching relay 4 is switched to the normally open side, the circuit is switched to the intermediate tap b of the primary winding of the tapped commercial power transformer 3, and 2 of the tapped commercial power transformer 3 The output voltage on the secondary side increases due to the turn ratio of the primary winding to the secondary winding, and the DC voltage V2 is the power supply of the external DC power supply 108. The high pressure side of the integrated voltage (e.g., DC48V) becomes equal to the voltage range (e.g., DC38.9V~DC57.6V) become. The microcomputer 2 compares the current I1 obtained by the rotation speed detection circuit 15 with a preset current value IS, and turns on the tap switching relay 4 when the current I1 falls below the set current value IS. Are programmed to be driven as follows.

  Therefore, since the DC voltage V2 generated by the external AC power supply 112 is automatically the same as the high voltage (eg, DC 48V) of the power supply system voltage of the external DC power supply 108, the supply is performed even when the external DC power supply 108 is not supplied. The inside air fan motor 105 can operate at the same rotational speed as when the external DC power supply 108 is supplied.

  In this way, since the tap switching of the commercial power transformer 3 with a tap provided with a tap is automatically performed on the winding of the commercial power transformer, the turn ratio of the primary winding to the secondary winding of the commercial power transformer 3 with a tap is set. Accordingly, since the output voltage of the commercial power transformer 3 with a tap can be transformed, the DC voltage V2 can be the same as the power system voltage of the external DC power supply 108, so when heating the heating element storage case 101, Even if the external DC power 108 is not supplied, the same DC voltage as that of the external DC power supply 108 is applied to the indoor air fan motor 105. Therefore, the internal air fan motor 105 rotates when the external DC power supply 108 is applied. It can be operated at the same number of rotations as the number, and the performance as the circulating air blowing means can be ensured.

(Embodiment 5 )
The same parts as those in the conventional example, the premise example 1, and the first to fourth embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

As shown in FIGS. 10, 11 and 12, as a temperature detecting means for detecting the temperature T _IN of the inside air of the heating element storage box 101 circulated in the inside air circulation air passage 104, as compared with the configuration of FIG. The thermistor 18 is connected, one of the thermistors 18 is connected to the voltage dividing resistor 19 of the control device 107 and the other is connected to the circuit ground of the control device 107, and the thermistor 18 and the voltage dividing resistor 19 are used. The divided voltage V5 is input to the microcomputer 2, and the temperature T _IN of the inside air of the heating element storage box 101 is recognized by voltage-temperature conversion data (not shown) set in advance. The microcomputer 2 has a predetermined temperature T _S (for example, the heating element housing box) that is an expected temperature in the inside air circulation air passage 104 that will be lowered due to insufficient heating due to insufficient operation of the inside air fan motor 105. As a condition for warming 101, when the temperature of the inside air of the heating element storage box 101 becomes 10 ° C. or lower, 5 ° C. is input in advance.

  Further, the heating device 110 for the heating element storage case cooling device that warms the inside air of the heating element storage case 101 includes an electric heater 111 in the inside air circulation air passage 104, and supplies the electric power to the electric heater 111. The electric heater 111 is connected to an external AC power source 112 supplied from the box 101 via a contact of a relay 113 as voltage applying means driven by the control device 107. One phase of the supplied external AC power source 112 is a 1C contact type tap switching relay 4 as a switch element as a tap switching means for automatically switching a plurality of taps provided in the primary winding of the tapped commercial power transformer 3. The normally open terminal of the tap switching relay 4 is connected to an intermediate tap b provided in the primary winding of the tapped commercial power transformer 3, and the normally closed terminal of the tap switching relay 4 is The other phase of the external AC power source 112 is connected to the common terminal c of the primary winding of the tapped commercial power transformer 3. A diode bridge 115 for full-wave rectification of the output voltage is connected to the secondary winding of the tapped power transformer 3, and the DC voltage V2 smoothed by the smoothing capacitor 116 is obtained. The inside air fan motor 105 and the control device 107 To the second backflow prevention element 117.

In the above configuration, when the external DC power supply 108 is not supplied and only the external AC power supply 112 is supplied, a device (not shown) mounted in the heating element storage box 101 is stably operated. When it is necessary to warm the inside of the heating element storage box 101, the contact of the relay 113 is closed and the voltage of the external AC power source 112 is applied to the electric heater 111 to cause the electric heater 111 to generate heat. The inside air fan motor 105 is driven to blow the heated inside air of the heating element storage box 101 flowing through the inside air circulation air passage 104 into the heating element storage box 101 to warm the heating element storage box 101. In the inside air fan motor 105, the external AC power source 112 is supplied to the primary side of the tapped commercial power transformer 3 when the contact of the tap switching relay 4 is normally closed, and the DC voltage V2 is the external DC power source. The power supply system voltage 108 is driven in a voltage range (for example, DC 20 V to DC 29 V) that is the same as a low voltage (for example, DC 24 V). When the inside air fan motor 105 is not fully rotated, the temperature T _IN of the inside air in the heating element housing box 101 detected by the thermistor 18 is the expected temperature in the inside air circulation air passage 104. The temperature falls below a predetermined temperature T _S (for example, when the temperature of the inside air of the heating element storage box 101 becomes 10 ° C. or less as a condition for heating the heating element storage box 101, the temperature is 5 ° C.). Assuming that the power for operating the internal air fan motor 105 is that the power supply system voltage of the external DC power supply 108 is high (for example, DC 48V), the relay drive circuit 7 is instructed to immediately turn on the tap switching relay 4, and the tap The contact of the switching relay 4 is switched to the normally open side, the circuit is switched to the intermediate tap b of the primary winding of the commercial power transformer 3 with tap, and the tapping is performed. The output voltage on the secondary side of the attached commercial power transformer 3 increases due to the turn ratio of the primary winding to the secondary winding, and the DC voltage V2 is the same as the high voltage side (for example, DC48V) of the power system voltage of the external DC power supply 108. Voltage range (for example, DC 38.9V to DC 57.6V). The microcomputer 2 compares the temperature T _IN of the inside air of the heating element storage box 101 with a predetermined temperature T _S that is an expected temperature in the inside air circulation air passage 104, and the temperature T _IN is lower than the predetermined temperature T _S. In this case, the tap switching relay 4 is programmed to be driven to turn on.

  Accordingly, the DC voltage V2 generated by the external AC power supply 112 is automatically the same as the high voltage side of the power supply system voltage of the external DC power supply 108 (for example, DC48V), so that the supply is performed even when the external DC power supply 108 is not supplied. The inside air fan motor 105 can operate at the same rotational speed as that when the external DC power supply 108 is supplied.

  In this way, since the tap switching of the commercial power transformer 3 with a tap provided with a tap is automatically performed on the winding of the commercial power transformer, the turn ratio of the primary winding to the secondary winding of the commercial power transformer 3 with a tap is set. Accordingly, since the output voltage of the commercial power transformer 3 with a tap can be transformed, the DC voltage V2 can be the same as the power system voltage of the external DC power supply 108, so when heating the heating element storage case 101, Even if the external DC power 108 is not supplied, the same DC voltage as that of the external DC power supply 108 is applied to the indoor air fan motor 105. Therefore, the internal air fan motor 105 rotates when the external DC power supply 108 is applied. It can be operated at the same number of rotations as the number, and the performance as the circulating air blowing means can be ensured.

(Embodiment 6 )
The same parts as those in the conventional example, the premise example 1, and the first to fifth embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIGS. 2 and 13, in addition to the configuration of FIG. 1, between the positive potential terminal 10a of the external DC power supply 108 and the first backflow prevention element and the negative potential terminal 10b of the external DC power supply 108, A power on / off relay 20, which is a B contact type relay as a power on / off means, is inserted between the inside air fan motor 105, the outside air fan motor 106 and the control device. Be operated.

  In the above configuration, the external DC power supply 108 is turned on, and the input DC voltage V1 of the external DC power supply 108 is divided by the first resistor 5 and the second resistor 6 and applied to the analog input terminal AIN of the microcomputer 2. In this microcomputer 2, the voltage of AIN is determined in order to determine the input DC voltage V1 on the assumption that the external DC power supply 108 supplied from the heating element storage box 101 is stable several seconds (for example, 3 seconds) after running the timer. If the first threshold voltage (for example, the input DC voltage V1 exceeds DC29V) is determined, the power supply system voltage of the external DC power supply 108 is determined to be on the high voltage side (for example, DC48V), and the tap switching relay 4 is immediately turned on. The relay drive circuit 7 is instructed to switch the contact of the tap switching relay 4 to the normally open side and the primary winding of the tapped commercial power transformer 3 The circuit is switched to the intermediate tap b, and the output voltage on the secondary side of the tapped commercial power transformer 3 is increased by the turn ratio of the primary winding to the secondary winding, and the DC voltage V2 is the power system voltage of the external DC power supply 108. In a state where the voltage range (for example, DC 38.9V to DC 57.6V) is the same as that on the high voltage side (for example, DC48V), the input DC voltage V1 is started after this stable state has been for a while (for example, after 1 second). If the AIN voltage of the microcomputer 2 exceeds a fourth threshold value (for example, the input DC voltage V1 corresponds to DC 57.6V) or exceeds the first threshold value, the fifth threshold value is reached. When the input DC voltage V1 is lower than (for example, equivalent to DC 38.9V), it is determined that the external DC power supply 108 is in an abnormal voltage state, and the relay drive circuit 7 Then, the power on / off relay 20 is turned on to open the contact of the power on / off relay 20 so that the external DC power supply 108 is not applied to the inside air fan motor 105, the outside air fan motor 106, and the control device 107. At the same time, based on the power system voltage information of the external DC power supply 108 stored in the non-volatile memory 1, the tap switching relay 4 is turned off when the voltage is low and turned on when the voltage is high. The inside air fan motor 105 and the outside air fan motor 106 can operate at the same rotational speed as when the external DC power supply 108 is normally supplied.

  In this way, since the tap switching of the commercial power transformer 3 with a tap provided with a tap is automatically performed on the winding of the commercial power transformer, the turn ratio of the primary winding to the secondary winding of the commercial power transformer 3 with a tap is set. Accordingly, since the output voltage of the tapped commercial power transformer 3 can be transformed, the DC voltage V2 can be the same as the power system voltage of the external DC power supply 108, so that the power system voltage of the external DC power supply 108 is correctly set. After the determination, the external DC power supply 108 is in an abnormal voltage state, and the internal air fan motor 105 and the outside air fan motor can be applied without applying the external DC power 108 to the inside air fan motor 105 and the outside air fan motor 106. 106, the same DC voltage as that of the external DC power supply 108 is applied to the inside air fan motor 105 and Air fan motor 106 can be operated in the same speed and rotational speed when the external DC power source 108 is applied, it can be secured performance as a circulating blower means.

  Although the microcomputer 2 has been described as a type in which the nonvolatile memory 1 is built, even if the nonvolatile memory 1 is provided outside the microcomputer 2, there is no difference in operational effects.

(Embodiment 7 )
The same parts as those in the conventional example, the premise example 1, and the first to sixth embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIGS. 14, 15, and 16, in addition to the configurations of FIGS. 3, 5, 6, and 7, and between the positive potential terminal 10 a of the external DC power supply 108 and the first backflow prevention element A power on / off relay 20, which is a B contact type relay as a power on / off means, is inserted between the negative potential terminal 10b of the external DC power source 108 and the inside air fan motor 105, the outside air fan motor 106 and the control device, The power on / off relay 20 is operated by the relay drive circuit 7.

  In the above configuration, the external DC power supply 108 is turned on, and the positive-to-ground voltage V3 of the external DC power supply 108 is divided by the third resistor 11 and the fourth resistor 12, and the analog input terminal AIN1 of the microcomputer 2 is divided. At the same time, the negative-to-ground voltage V4 of the external DC power supply 108 is divided by the fifth resistor 13 and the sixth resistor 14 and applied to the analog input terminal AIN2 of the microcomputer 2. In the microcomputer 2, a few seconds (for example, 3 seconds) after running the timer, the external DC power supply 108 supplied from the heating element storage box 101 is regarded as stable, and the voltage of AIN1 is determined to determine the positive-to-ground voltage V3. The voltage of AIN2 is less than a second threshold value (for example, the positive side ground voltage V3 is equivalent to DC 1.0 V) and the negative side ground voltage V4 is determined to be a third voltage. If the value (for example, the negative electrode-to-ground voltage V4 exceeds DC1.0V), the external DC power supply 108 determines that the positive electrode potential is a high voltage (for example, DC48V) with an active phase, and immediately tap switching relay 4 The relay drive circuit 7 is commanded to turn on, the contact of the tap switching relay 4 is switched to the normally open side, and the circuit is switched to the intermediate tap b of the primary winding of the commercial power transformer 3 with the tap so that the commercial power source with the tap is switched. The output voltage on the secondary side of the transformer 3 increases due to the turn ratio of the primary winding to the secondary winding, and the DC voltage V2 is the same voltage as the high voltage side (for example, DC48V) of the power supply system voltage of the external DC power supply 108. In a state where the range (for example, DC 38.9V to DC 57.6V) is reached, the positive-side pair is started after this stable state has passed for a while (for example, after 1 second). The voltage V3 and the negative-to-ground voltage V4 are monitored, and the voltage of the AIN1 of the microcomputer 2 exceeds a second threshold (for example, the positive-side to ground voltage V3 corresponds to DC 1.0 V), and When the voltage of AIN2 of the microcomputer 2 exceeds a third threshold (for example, the negative-to-ground voltage V4 is equivalent to 1.0 V DC), or when the voltage of AIN1 of the microcomputer 2 is the second threshold (for example, When the positive side ground voltage V3 is lower than DC 1.0V) and the voltage of AIN2 of the microcomputer 2 is lower than a third threshold (for example, the negative side ground voltage V4 is equivalent to DC 1.0V). Determines that the external DC power supply 108 is in an abnormal voltage state, and turns on the power on / off relay 20 by the relay drive circuit 7 to open the contact of the power on / off relay 20, so that the internal air fan The external DC power supply 108 is prevented from being applied to the motor 105, the outside air fan motor 106 and the control device 107, and based on the power system voltage information of the external DC power supply 108 stored in the nonvolatile memory 1, that is, the low voltage The internal air fan motor 105 and the external air fan motor 106 operate normally so that the external DC power supply 108 is normal. It is possible to operate at the same rotation speed as that at the time of supply.

  In this way, since the tap switching of the commercial power transformer 3 with a tap provided with a tap is automatically performed on the winding of the commercial power transformer, the turn ratio of the primary winding to the secondary winding of the commercial power transformer 3 with a tap is set. Accordingly, since the output voltage of the tapped commercial power transformer 3 can be transformed, the DC voltage V2 can be the same as the power system voltage of the external DC power supply 108, so that the power system voltage of the external DC power supply 108 is correctly set. After the determination, the external DC power supply 108 is in an abnormal voltage state, and the internal air fan motor 105 and the outside air fan motor can be applied without applying the external DC power 108 to the inside air fan motor 105 and the outside air fan motor 106. 106, the same DC voltage as that of the external DC power supply 108 is applied to the inside air fan motor 105 and Air fan motor 106 can be operated in the same speed and rotational speed when the external DC power source 108 is applied, it can be secured performance as a circulating blower means.

  Although the microcomputer 2 has been described as a type in which the nonvolatile memory 1 is built, even if the nonvolatile memory 1 is provided outside the microcomputer 2, there is no difference in operational effects.

(Embodiment 8 )
The same parts as those of the conventional example, the premise example 1, and the first to seventh embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 12, in addition to the configuration of FIG. 1, the control device 107 includes an LED 21 as a light emitting display means.

  In the above configuration, when the tap switching relay 4 is operated and the power supply system voltage of the external DC power supply 108 is determined to be on the high voltage side (for example, DC 48 V), the LED 21 is turned on.

  In this way, it is possible to recognize whether the power supply system voltage of the external DC power supply 108 is on the high voltage side (for example, DC48V) or the low voltage side (for example, DC24V).

  Although the LED is used as the light emitting display means, a 7-segment LED or a liquid crystal display device may be used, and there is no difference in operational effects. Further, although the light emitting display means is used as the recognition means, there is no difference in operation and effect even if sound generation means such as a buzzer or a speaker is used.

(Embodiment 9 )
The same parts as those in the conventional example, the premise example 1, and the first to eighth embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 13, in addition to the configuration of FIG. 12, a communication circuit 22 is provided in the control device 107 to include a communication line 23 that communicates with the heating element storage box 101.

  With the above configuration, when the tap switching relay 4 is operated and the power supply system voltage of the external DC power supply 108 is determined to be on the high voltage side (for example, DC 48V), the communication circuit 22 synchronizes with the bit information of serial communication. For example, if the power supply system voltage of the external DC power supply 108 is on the high voltage side (for example, DC48V), it is “00”, and if the power supply system voltage of the external DC power supply 108 is on the low voltage side (for example, DC24V), “01”. The data is transmitted to the heating element storage box 101 via the communication line 23.

  Thus, since the communication circuit 22 is provided and the communication line 23 for communicating with the heating element storage box 101 is provided, whether the power supply system voltage of the external DC power supply 108 is on the high voltage side (for example, DC48V) is low. The remote location can be informed whether it is the side (for example, DC 24V).

  Here, although the two-wire system is used as the serial signal, there is no difference in operation and effect even in the parallel communication according to the information bit amount by the parallel communication method, the communication using the optical fiber, or the wireless method using radio.

  In industries such as industrial equipment and air conditioners where DC power supplies exist in multiple power system voltages, AC power is supplied as auxiliary power to equipment that uses DC power as the main power source for equipment operation. It can be applied to equipment that operates only with an AC power supply.

DESCRIPTION OF SYMBOLS 1 Nonvolatile memory 2 Microcomputer 3 Commercial power transformer with a tap 4 Tap switching relay 5 1st resistor 6 2nd resistor 7 Relay drive circuit 8 Ground terminal 9 Earth ground 10a Positive side potential terminal 11b Negative side potential terminal 11 1st 3 resistor 12 4th resistor 13 5th resistor 14 6th resistor 15 speed detection circuit 16 shunt resistor 17 current detection circuit 18 thermistor 19 voltage dividing resistor 20 power on / off relay 21 LED
DESCRIPTION OF SYMBOLS 22 Communication circuit 23 Communication line 101 Heating body storage box 102 Cooling device 103 Heat exchanger 104 Inside air circulation air path 105 Inside air fan motor 106 Outside air fan motor 107 Control device 108 External DC power supply 109 First backflow prevention element 110 Heating body Heating device for storage case cooling device 111 Electric heater 112 External AC power supply 113 Relay 114 Commercial power supply transformer 115 Diode bridge 116 Smoothing capacitor 117 Second backflow prevention element

Claims (10)

Heat exchanging means for exchanging heat of the inside air in the heating element storage box with heat of outside air outside the heating element box; and taking the inside air in the heating element box and exchanging heat by the heat exchanging means An internal air circulation air passage that circulates and blows air into the storage box, an internal air circulation blower that circulates the internal air, and heat of the internal air inside the heating element storage box by the heat exchange means that takes in outside air outside the heating element storage box electric heaters to warm the outside air circulating air duct for circulating blowing out the heating element accommodating box making by heat exchange, and the outside air circulating blower means for circulating blowing the outside air, the heat generating member housing a box provided in the inside air circulation air duct When, a control device for operating the external air circulating blower means and said inside air circulation blower unit, an external AC power source and a power source of the external DC power source and the electric heater to the power of the inside air circulating blower means and the outside air circulating blower means , the external And the commercial power transformer that having a plurality of taps are connected to a flow source, tap changer for switching said plurality of taps so as to match the DC voltage output obtained from the commercial power transformer in the power supply system voltage of the external DC power supply in AC-DC converter circuit of the origination heat medium storage box making the cooling apparatus for heating and means, the external DC power supply, high-voltage power supply system voltage and the negative the positive electrode side potential becomes the ground phase that is connected to earth ground The control device includes one of a low-voltage power system voltage serving as a ground phase connected to a ground, and the control device detects the ground by detecting the ground and the positive side potential or the negative side potential. An AC / DC conversion circuit for a heating device for a heating element storage case cooling device, wherein a power supply system voltage of a DC power supply is judged and a tap switching means is operated. AC-DC converter of claim 1 Symbol placement of the heating element storing box making the cooling apparatus for a heating device, characterized in that to operate the plurality of switching elements of the tap switching unit connected to a tap provided to the primary winding of the commercial power transformer circuit. AC-DC converter of claim 1 Symbol placement of the heating element storing box making the cooling apparatus for a heating device, characterized in that to operate the plurality of switching elements of the tap switching unit connected to a tap provided on the secondary winding of the commercial power transformer circuit. It is equipped with a rotation speed detection means that detects the rotation speed of the fan motor, which is an internal air circulation blower means. When there is no external DC power supply, the tap switching means is tapped when the power of the internal air circulation blower means is supplied by the external AC power supply. If the rotational speed detected by the rotational speed detection means of the internal air circulation blower means does not reach a desired rotational speed, the external direct current power supply is set. power supply system voltage is determined to be the high pressure side of any one of claims 1 to 3 output the tap switching unit of the tapped commercial power transformer and switches so that the high-pressure side An AC / DC conversion circuit of the heating device for the heating element storage case cooling device described in the above. Provided with current detection means connected in series to the input part of the inside air circulation blower means, there is no supply of external DC power, and when the power of the inside air circulation blower means is supplied by the external AC power supply, the tap switching means is a commercial with tapping If the output of the power transformer is set to the low voltage side, and the current value detected by the current detection means does not reach a desired value, the power system voltage of the external DC power supply is on the high voltage side The heating for the heating element storage case cooling device according to any one of claims 1 to 3 , wherein the tap switching means is switched so that the output of the tapped commercial power transformer is on the high voltage side. AC / DC conversion circuit of the device. A temperature detecting means for detecting the temperature of the inside air circulated in the inside air circulation air passage is provided, the outside AC power supply is energized to the electric heater that heats the heating element storage box without supplying an external DC power supply, and the inside air circulation blowing means When the motive power is supplied by an external AC power source, the tap switching means is set so that the output of the tapped commercial power transformer is on the low-pressure side, and the temperature detected by the temperature detecting means is equal to or lower than the desired temperature. When it becomes, the power supply system voltage of the external DC power supply is determined to be on the high voltage side, and the tap switching means is switched so that the output of the tapped commercial power transformer is on the high voltage side. The AC-DC conversion circuit of the heating device for a heating element housing case cooling device according to any one of 1 to 3 . A power on / off means for applying an external DC power supply to the inside air circulation air blowing means and the outside air circulation air blowing means is provided, and the power supply system voltage of the external DC power supply is temporarily detected by the input voltage detection means for detecting the input voltage of the external DC power supply. After the determination, when the input voltage of the external DC power supply does not match the preset power supply system voltage of the external DC power supply, the power on / off means is opened, and the inside air circulation blowing means and the outside air circulation ventilation are opened. AC-DC converter of the power heating element accommodating box making the cooling apparatus for a heating device according to any one of claims 1 or 2 to 6, characterized in that so as to supply an external AC power source to the unit. Power supply on / off means for applying an external DC power supply to the internal air circulation air supply means and the external air circulation air supply means, positive electrode side ground voltage detection means for detecting the potential difference between the positive electrode side potential of the external DC power supply and the ground, and The negative side voltage detection means for detecting the potential difference between the negative side potential of the external DC power source and the ground is used to temporarily determine the power system voltage of the external DC power source, and the input voltage of the external DC power source is set to the preset external DC When the power supply system voltage of the power supply no longer matches, the power on / off means is opened, and the power to the inside air circulation air blowing means and the outside air circulation air blowing means is once determined by the output of the tapped commercial power transformer. by switching the tap switching unit so that the power supply system voltage of the external DC power supply, heating element housing according to claim 7, characterized in that so as to supply an external AC power source Hakohiya AC DC converter circuit of the apparatus for the heating device. The heating element housing case cooling according to any one of claims 1 to 8, further comprising light emitting display means or sound generation means for notifying a result of determining a power system voltage of the external power supply voltage. AC / DC conversion circuit for heating device. The heating element storage case cooling apparatus according to any one of claims 1 to 9 , further comprising communication means for notifying an operation center that remotely monitors a result of determining a power system voltage of the external power supply voltage. AC / DC conversion circuit for heating equipment.

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