JP4899358B2 - Power supply stabilization circuit 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 a power supply stabilization circuit for a cooling device for a heating element storage case.

  2. Description of the Related Art Conventionally, a power source stabilization circuit for this type of heating element housing case cooling device is known that uses a switching power source by high-frequency switching (see, for example, Non-Patent Document 1).

  Hereinafter, the power supply stabilization circuit of the heating element storage case cooling apparatus will be described with reference to FIGS. 13, 14, and 15. FIG.

  As shown in the figure, the cooling device 102 for cooling the heating element storage box 101 is controlled by an electronic control device 104 equipped with a heat exchanger 103 as a heat exchanging means for waste heat of the inside air temperature to the outside air and a microcomputer as a control means. The DC fan motor 105 to be driven is connected.

  A DC power source 106 as a main power source supplied from the heating element storage box 101 is supplied to the cooling device 102, connected to the electronic control device 104, and connected to the DC fan motor 105. Further, a commercial AC power source 107 as an auxiliary power source supplied from the heating element storage box 101 is also supplied to the cooling device 102 and connected to a switching power source 109 by high frequency switching that converts an AC voltage into a DC voltage after passing through a noise filter 108. Then, it is converted into a DC voltage V1 which is a desired output voltage and connected to the DC fan motor 105.

  With the above configuration, the DC power supply 106 as the main power supply that is normally supplied can be commercialized even when the DC power supply 106 is not supplied due to the operation of a DC power supply breaker (not shown) of the heating element storage case 101, for example. Since the AC power supply 107 is supplied, the DC fan motor 105 is driven based on the command of the electronic control device 104 by the desired DC voltage V1 converted by the switching power supply 109 to circulate the outside air and the inside air, thereby reducing the inside air temperature. The heating element storage box 101 is cooled by waste heat to the outside air.

  In addition, the power supply stabilization circuit for this type of heating element storage case cooling device has a selector switch and a commercial power transformer on the primary side so that it can handle a wide range of 200V commercial power sources worldwide with nominal voltages ranging from 200V to 250V. Some have multiple taps.

  Hereinafter, the power supply stabilization circuit of the heating element housing case cooling apparatus will be described with reference to FIG.

  As shown in the figure, a selector switch 110 that switches a commercial AC power source 107 as an auxiliary power source supplied to the cooling device 102 from the heating element storage box 101 to each nominal voltage (generally 200V, 208V, 220V, 230V, 240V, 250V). Are connected to a plurality of (generally six) taps (generally six) for each nominal voltage provided on the primary side of the commercial power transformer 111, and the secondary output of the commercial power transformer 111 is A DC voltage V 1 rectified and smoothed by one diode bridge 112 and the first capacitor 113 is connected to the DC fan motor 105.

With the above configuration, when the selector switch 103 is turned to adjust the nominal voltage of the commercial AC power source 107 during construction of the cooling device 102, the contact of the select switch 103 is manually set to the rated voltage of the commercial AC power source 107 of the commercial power transformer 111. The desired DC voltage V1 is generated by connecting to a tap suitable for the DC power supply 106, and the DC power supply 106 as a main power supply that is normally supplied is operated by, for example, a breaker (not shown) of the heating element storage box. Since the commercial AC power supply 107 is supplied even when the supply is stopped, the DC fan motor 105 is driven based on the command of the electronic control unit 104 by the desired DC voltage V1 to circulate the outside air and the inside air, and the inside temperature is changed to the outside air. The heating element storage box 101 is cooled by waste heat.
"Switching power supply handbook" supervised by Kosuke Harada, Nikkan Kogyo Shimbun, November 30, 1993

  The power source stabilization circuit of the conventional heating element housing cooling device using a switching power source by such high frequency switching has a problem of continuous high frequency noise radio wave radiation by high frequency switching. Reduce the continuous high frequency noise radio waves radiated to a level that does not affect communication. For example, in the 800 MHz band of the mobile phone communication frequency, according to the disturbance wave limit value of CISPR22 information technology equipment, 37 dBμV / m is obtained by the 10 m method. If exceeded, there is a risk of injury to the equipment, and at least significantly below this level is required.

  In addition, there is a problem that the input voltage range of the switching power supply is generally 90V to 264V even in the type that is compatible with the multi-power supply, and the voltage fluctuation of a wide range of 200V commercial power supply worldwide with a nominal voltage ranging from 200V to 250V ± 10% Is required to be able to cover 180V to 275V.

  Moreover, in the power source stabilization circuit of the conventional heating element storage case cooling device using a select switch for switching a plurality of taps on the primary side of the commercial power transformer, the nominal voltage of the commercial AC power source supplied by the installer during construction It is necessary to operate the select switch in accordance with this, and there is a problem of increasing the work man-hour at the time of construction, and it is required to reduce the work man-hour at the time of construction.

  In addition, there is a problem that the setting of the select switch operated by the installer during construction is wrong, and it is required that no human error be involved.

  Further, when commercial AC power is supplied out of the nominal voltage ± 10% due to troubles such as power transmission / distribution facilities, the output DC voltage V1 deviates from a desired value in the fixed tap connection by the select switch. There is a problem, and even if the commercial AC power supply deviates from the nominal voltage ± 10% due to troubles such as power transmission and distribution facilities, it is required not to deviate from the desired DC voltage.

  The present invention solves such a conventional problem, can eliminate the continuous emission of high-frequency noise radio waves, can reduce the work man-hours during construction and prevent setting errors, An object of the present invention is to provide a power source stabilization circuit for a heating element housing cooling device that can cope with a wide range of nominal voltages around the world and can automatically adjust an output voltage even when the power source fluctuates.

Power supply stabilizing circuit of the heating element storing box making the cooling apparatus of the present invention, in order to achieve the above object, a cooling device for cooling the heat generating member housing a box, provided in the cooling device, the outside air of the heating element accommodating box making in the heat generating element storing box making the cooling apparatus provided with an electronic control device as a DC motor and the cooling device controlling means as waste heat circulating blower means inside air temperature of the outside air by circulating inside air, the cooling device is a DC power supply A main power supply device and an auxiliary power supply device that transforms and smoothes the supplied commercial power supply into a direct current, and the auxiliary power supply device converts the AC voltage supplied from the heating element storage box to a desired voltage. A commercial power transformer is provided as a transforming means for transforming into a range, and the commercial DC transformer is used as a means for keeping the smoothed DC voltage after the full-wave rectifier circuit connected to the secondary winding side of the commercial power transformer within a desired output voltage range. A tap switching means for automatically switching a plurality of taps provided in the winding of the source transformer, and a voltage for assisting the main power supply device from the commercial power supply transformer when the main power supply device is shut off. It supplies to the said electronic control apparatus, It is characterized by the above-mentioned.

The auxiliary power unit This unit is intended to supply a voltage to assist the main power supply from the commercial power transformer when the main power supply is cut off to the DC motor and the electronic control unit, a main power supply Switching between a plurality of taps using a commercial power transformer that transforms at a commercial power frequency by supplying a voltage assisting the main power supply from the commercial power transformer to the DC motor and the electronic control device when cut off no continuous high frequency noise waves radiated by adjusting automatically performs voltage, to reduce the construction stage during working steps, eliminating even wrong operation during construction, the desired output corresponding to a commercial AC power source that varies A power stabilization circuit for the heating element housing cooling device that can automatically adjust to the voltage is obtained.

  Another means is provided with an output voltage detecting means for detecting an output voltage of the commercial power transformer in a tap switching means for automatically switching a plurality of taps provided in the winding of the commercial power transformer.

  By using a commercial power transformer that transforms at the commercial power frequency by this means, there is no continuous emission of high frequency noise radio waves, and multiple taps provided on the power transformer are automatically switched, and the work man-hours during construction Thus, a power supply stabilization circuit for a heating element housing cooling device that can automatically adjust to a desired output voltage corresponding to a changing commercial AC power supply can be obtained.

  The other means operates the plurality of switch elements of the tap switching means connected to the plurality of taps provided in the primary side winding of the commercial power transformer by the output voltage detection means.

  By using a commercial power transformer that transforms at the commercial power frequency by this means, there is no continuous emission of high frequency noise radio waves, and multiple taps provided on the power transformer are automatically switched, and the work man-hours during construction Thus, a power supply stabilization circuit for a heating element housing cooling device that can automatically adjust to a desired output voltage corresponding to a changing commercial AC power supply can be obtained.

  The other means operates the switch element of the tap switching means connected to the plurality of taps provided in the secondary winding of the commercial power transformer by the output voltage detection means.

  By using a commercial power transformer that transforms at the commercial power frequency by this means, there is no continuous emission of high frequency noise radio waves, and multiple taps provided on the power transformer are automatically switched, and the work man-hours during construction Thus, a power supply stabilization circuit for a heating element housing cooling device that can automatically adjust to a desired output voltage corresponding to a changing commercial AC power supply can be obtained.

  The other means operates the switch element of the tap switching means connected to a plurality of taps provided on the primary side winding and the secondary side winding of the commercial power transformer by the output voltage detection means.

  By using a commercial power transformer that transforms at the commercial power frequency by this means, there is no continuous emission of high frequency noise radio waves, and multiple taps provided on the power transformer are automatically switched, and the work man-hours during construction Thus, a power supply stabilization circuit for a heating element housing cooling device that can automatically adjust to a desired output voltage corresponding to a changing commercial AC power supply can be obtained.

  Another means is that a wide range of commercial AC voltages from 200 V to 250 V is supplied to the tap switching means for automatically switching a plurality of taps provided in the winding of the commercial power transformer from the heating element storage box. Input AC voltage detection means for detecting a value is provided.

  By using a commercial power transformer that transforms at the commercial power frequency by this means, there is no continuous emission of high frequency noise radio waves, and multiple taps provided on the power transformer are automatically switched, and the work man-hours during construction Thus, a power supply stabilization circuit for a heating element housing cooling device that can automatically adjust to a desired output voltage corresponding to a changing commercial AC power supply can be obtained.

  Another means is to operate the plurality of switch elements of the tap switching means connected to the plurality of taps provided in the primary side winding of the commercial power transformer by the input AC voltage detection means.

  By using a commercial power transformer that transforms at the commercial power frequency by this means, there is no continuous emission of high frequency noise radio waves, and multiple taps provided on the power transformer are automatically switched, and the work man-hours during construction Thus, a power supply stabilization circuit for a heating element housing cooling device that can automatically adjust to a desired output voltage corresponding to a changing commercial AC power supply can be obtained.

  The other means operates the switch element of the tap switching means connected to the plurality of taps provided in the secondary winding of the commercial power transformer by the input AC voltage detecting means.

  By using a commercial power transformer that transforms at the commercial power frequency by this means, there is no continuous emission of high frequency noise radio waves, and multiple taps provided on the power transformer are automatically switched, and the work man-hours during construction Thus, a power supply stabilization circuit for a heating element housing cooling device that can automatically adjust to a desired output voltage corresponding to a changing commercial AC power supply can be obtained.

  The other means operates the switching element of the tap switching means connected to the plurality of taps provided on the primary side winding and the secondary side winding of the commercial power transformer by the input AC voltage detection means. .

  By using a commercial power transformer that transforms at the commercial power frequency by this means, there is no continuous emission of high frequency noise radio waves, and multiple taps provided on the power transformer are automatically switched, and the work man-hours during construction Thus, a power supply stabilization circuit for a heating element housing cooling device that can automatically adjust to a desired output voltage corresponding to a changing commercial AC power supply can be obtained.

  Another means is that a wide range of commercial AC voltages from 200 V to 250 V is supplied to the tap switching means for automatically switching a plurality of taps provided in the winding of the commercial power transformer from the heating element storage box. Input AC voltage detection means for detecting the value and output voltage detection means for detecting the output voltage of the commercial power transformer.

  By using a commercial power transformer that transforms at the commercial power frequency by this means, there is no continuous emission of high frequency noise radio waves, and multiple taps provided on the power transformer are automatically switched, and the work man-hours during construction Thus, a power supply stabilization circuit for a heating element housing cooling device that can automatically adjust to a desired output voltage corresponding to a changing commercial AC power supply can be obtained.

  The other means operates a plurality of switch elements of the tap switching means connected to the plurality of taps provided on the primary side winding of the commercial power transformer by the input AC voltage detecting means and the output voltage detecting means. is there.

  By using a commercial power transformer that transforms at the commercial power frequency by this means, there is no continuous emission of high frequency noise radio waves, and multiple taps provided on the power transformer are automatically switched, and the work man-hours during construction Thus, a power supply stabilization circuit for a heating element housing cooling device that can automatically adjust to a desired output voltage corresponding to a changing commercial AC power supply can be obtained.

  The other means operates a plurality of switch elements of the tap switching means connected to the plurality of taps provided on the secondary winding of the commercial power transformer by the input AC voltage detection means and the output voltage detection means. is there.

  By using a commercial power transformer that transforms at the commercial power frequency by this means, there is no continuous emission of high frequency noise radio waves, and multiple taps provided on the power transformer are automatically switched, and the work man-hours during construction Thus, a power supply stabilization circuit for a heating element housing cooling device that can automatically adjust to a desired output voltage corresponding to a changing commercial AC power supply can be obtained.

  Further, the other means includes a switch element of a tap switching means connected to a plurality of taps provided on the primary side winding and the secondary side winding of the commercial power transformer by the input AC voltage detection means and the output voltage detection means. It is what makes it work.

  By using a commercial power transformer that transforms at the commercial power frequency by this means, there is no continuous emission of high frequency noise radio waves, and multiple taps provided on the power transformer are automatically switched, and the work man-hours during construction Thus, a power supply stabilization circuit for a heating element housing cooling device that can automatically adjust to a desired output voltage corresponding to a changing commercial AC power supply can be obtained.

  According to the present invention, there is no need for continuous high-frequency noise radio wave radiation, a small number of work steps at the time of construction, no operation mistakes, and a heating element housing box cooling device that can automatically adjust to a desired output voltage corresponding to a changing commercial AC power supply. A power supply stabilization circuit can be provided.

The invention of claim 1, wherein the present invention, a cooling device for cooling the heat generating member housing a box, provided in the cooling device, the waste heat of the inside air temperature of the outside air by circulating inside air and outside air of the heating element accommodating box making In the heating element housing case cooling device provided with a direct current motor as a circulating air blowing means and an electronic control device as a cooling device control means, the cooling device transforms a main power supply device which is a direct current power source and a commercial power supply to be supplied. And an auxiliary power supply device that rectifies and smoothes the direct current, and the auxiliary power supply device is provided with a commercial power transformer as a transforming means for transforming the AC voltage supplied from the heating element storage box to a desired voltage range, A plurality of taps provided in the commercial power transformer winding are automatically used as means for keeping the smoothed DC voltage after the full-wave rectifier circuit connected to the secondary winding side of the commercial power transformer in a desired output voltage range. With a tap switching unit for switching on, the From commercial power transformer, wherein the benzalkonium to supply voltage to assist the main power supply to the electronic control unit and the DC motor when the main power supply is cut off When the main power supply is cut off, the auxiliary power supply device transforms at a commercial power supply frequency by supplying a voltage assisting the main power supply device from the commercial power transformer to the DC motor and the electronic control device. Automatic switching of multiple taps using a commercial power transformer eliminates continuous high-frequency noise emission, reduces work man-hours during construction, eliminates mistakes in construction, and fluctuates commercial AC It has the effect that it can be automatically adjusted to a desired output voltage corresponding to the power source.

  According to a second aspect of the present invention, the tap switching means for automatically switching a plurality of taps provided in the winding of the commercial power transformer includes an output voltage detection means for detecting the output voltage of the commercial power transformer. By using a commercial power transformer that transforms at the commercial power frequency, there is no continuous high frequency noise radio wave radiation, and multiple taps provided on the power transformer are automatically switched to work man-hours during construction. It is possible to eliminate the mistake in operation at the time of construction, and to automatically adjust to a desired output voltage corresponding to the changing commercial AC power supply.

  The invention according to claim 3 of the present invention is to operate the plurality of switch elements of the tap switching means connected to the plurality of taps provided in the primary side winding of the commercial power transformer by the output voltage detection means, By using a commercial power transformer that transforms at the commercial power frequency, there is no continuous high-frequency noise emission, and multiple taps provided on the power transformer are automatically switched to reduce the number of work steps during construction. In addition, there is an effect that an operation mistake at the time of construction is eliminated, and a desired output voltage corresponding to the changing commercial AC power supply can be automatically adjusted.

  According to a fourth aspect of the present invention, the switch element of the tap switching means connected to the plurality of taps provided on the secondary side winding of the commercial power transformer is operated by the output voltage detecting means. By using a commercial power transformer that transforms at a frequency, there is no continuous emission of high-frequency noise radio waves, and by automatically switching multiple taps provided on the power transformer, the number of work steps during construction is reduced, and construction is performed. There is an effect that it is possible to automatically adjust the output voltage to a desired value corresponding to the changing commercial AC power supply by eliminating the operation mistake at the time.

  According to the fifth aspect of the present invention, the switch element of the tap switching means connected to the plurality of taps provided on the primary side winding and the secondary side winding of the commercial power transformer is operated by the output voltage detection means. By using a commercial power transformer that transforms at the commercial power frequency, there is no continuous high-frequency noise emission, and multiple taps provided on the power transformer are automatically switched during construction. There is an effect that man-hours are reduced, operation mistakes during construction are eliminated, and the output voltage can be automatically adjusted to a desired output voltage corresponding to the changing commercial AC power supply.

  According to the sixth aspect of the present invention, the nominal voltage supplied from the heating element storage box to the tap switching means for automatically switching a plurality of taps provided in the winding of the commercial power transformer is wide ranging from 200V to 250V. It is characterized by having input AC voltage detection means for detecting the value of commercial AC voltage, and there is no continuous high frequency noise radio wave emission by using a commercial power transformer that transforms at the commercial power frequency. In addition, by automatically switching a plurality of taps provided on the power transformer, the number of work steps during construction can be reduced, operation mistakes during construction can be eliminated, and a desired output voltage corresponding to a changing commercial AC power supply can be automatically adjusted. It has the action.

  According to the seventh aspect of the present invention, the plurality of switch elements of the tap switching means connected to the plurality of taps provided in the primary side winding of the commercial power transformer are operated by the input AC voltage detection means. By using a commercial power transformer that transforms at the commercial power frequency, there is no continuous emission of high-frequency noise radio waves, and multiple taps provided on the power transformer are automatically switched to reduce the work man-hours during construction. In addition, there is an effect that an operation mistake at the time of construction is eliminated, and a desired output voltage corresponding to a changing commercial AC power supply can be automatically adjusted.

  In the invention according to claim 8 of the present invention, the switching element of the tap switching means connected to the plurality of taps provided in the secondary winding of the commercial power transformer is operated by the input AC voltage detecting means. By using a commercial power transformer that transforms at the power frequency, there is no continuous emission of high frequency noise radio waves, and by automatically switching multiple taps provided on the power transformer, the number of work steps during construction is reduced, There is an effect that it is possible to automatically adjust the output voltage to a desired value corresponding to the changing commercial AC power supply by eliminating a mistake in operation during construction.

  According to the ninth aspect of the present invention, the switching element of the tap switching means connected to the plurality of taps provided on the primary side winding and the secondary side winding of the commercial power transformer is operated by the input AC voltage detecting means. By using a commercial power transformer that transforms at the commercial power frequency, there is no continuous high-frequency noise emission, and multiple taps provided on the power transformer are automatically switched during installation. It has the effect of reducing the number of work steps, eliminating the mistake in operation during construction, and automatically adjusting to a desired output voltage corresponding to the changing commercial AC power supply.

  According to the tenth aspect of the present invention, the nominal voltage supplied from the heating element storage box to the tap switching means for automatically switching a plurality of taps provided in the winding of the commercial power transformer is wide ranging from 200V to 250V. It is characterized by comprising an input AC voltage detecting means for detecting the value of the commercial AC voltage and an output voltage detecting means for detecting the output voltage of the commercial power transformer. By using it, there is no continuous high frequency noise radio wave emission, and by automatically switching the multiple taps provided on the power transformer, the work man-hours at the time of construction are reduced, and there are no mistakes in the operation at the time of construction. It has the effect that it can be automatically adjusted to a desired output voltage corresponding to the commercial AC power supply.

  According to the eleventh aspect of the present invention, the plurality of switch elements of the tap switching means connected to the plurality of taps provided in the primary side winding of the commercial power transformer by the input AC voltage detection means and the output voltage detection means. Uses a commercial power transformer that transforms at the commercial power frequency so that there is no continuous high-frequency noise emission, and multiple taps provided on the power transformer are automatically switched. It has the effect of reducing the time work man-hours, eliminating the mistake in operation during construction, and automatically adjusting to a desired output voltage corresponding to the changing commercial AC power supply.

  According to a twelfth aspect of the present invention, the plurality of switch elements of the tap switching means connected to the plurality of taps provided on the secondary side winding of the commercial power transformer by the input AC voltage detecting means and the output voltage detecting means. Uses a commercial power transformer that transforms at the commercial power frequency so that there is no continuous high-frequency noise emission, and multiple taps provided on the power transformer are automatically switched. It has the effect of reducing the time work man-hours, eliminating the mistake in operation during construction, and automatically adjusting to a desired output voltage corresponding to the changing commercial AC power supply.

  According to a thirteenth aspect of the present invention, tap switching means connected to a plurality of taps provided on the primary side winding and the secondary side winding of the commercial power transformer by the input AC voltage detection means and the output voltage detection means. By using a commercial power transformer that transforms at a commercial power frequency, there is no continuous high-frequency noise emission, and multiple taps provided on the power transformer are automatically switched. By doing so, there is an effect that the number of work man-hours at the time of construction is reduced, an operation error at the time of construction is eliminated, and a desired output voltage corresponding to a changing commercial AC power supply can be automatically adjusted.

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

(Embodiment 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, a DC power source 106 as a main power source and a commercial AC power source 107 as an auxiliary power source are supplied to a cooling device 102 that cools the heating element storage case 101. The supplied direct current power source 106 is connected to an electronic control device 104 equipped with a direct current fan motor 105 as a circulating air blowing means provided in the cooling device 102 and a microcomputer 1 as a cooling device control means. One phase of the supplied commercial AC power supply 107 is a 1C contact type as a switch element as a tap switching means for automatically switching a plurality of taps provided in the primary side winding of the commercial power transformer 111. Connected to the common terminal of the relay 2a, the normally closed terminal of the first relay 2a is connected to one of a plurality of taps provided on the primary side winding of the commercial power transformer 111, and the first relay 2a The normally open terminal is connected to the common terminal of the second relay 2b which is a 1C contact type as a switching element as a tap switching means, and the normally closed terminal of the second relay 2b is the primary side of the commercial power transformer 111. Connected to one of a plurality of other taps provided on the winding, the normally open terminal of the second relay 2b is connected to a plurality of pins provided on the primary side winding of the commercial power transformer 111. Is connected to the remaining one of the flops, other phases of the commercial AC power source 107 is connected to the common terminal of the primary winding of the commercial power transformer 111. The secondary winding of the commercial power transformer 111 is connected to the first diode bridge 112 for full-wave rectification of the output voltage and becomes a DC voltage V1 smoothed by the first capacitor 113, and the DC fan motor 105 and Connected to the electronic control unit 104. The electronic control device 104 includes a first resistor 3, a second resistor 4, and the microcomputer 1 as means for detecting an output voltage of the commercial power transformer 111.

  In the above configuration, the DC voltage V1 is generated by the AC voltage applied to the commercial power transformer 111 by the commercial AC power source 107, and is divided by the first resistor 3 and the second resistor 4 to be analog input of the microcomputer 1. The relay drive circuit 5 is instructed to turn on the first relay 2a immediately after the voltage applied to the terminal AIN and the voltage of AIN exceeds a first threshold value (e.g., 29V corresponding to the voltage of V1) The contact of the relay 2a is switched to the normally open side, the circuit is switched to a tap where the number of turns of the primary side winding of the commercial power transformer 111 is increased, and the output of the secondary side voltage of the commercial power transformer 111 is lowered due to the turn ratio. Thereafter, when the DC voltage V1 changes due to a change in the voltage value of the commercial AC power supply 107 and the voltage of AIN exceeds the first threshold value, the relay drive circuit 5 is instructed to immediately turn on the second relay 2b. The contact of the second relay 2b is switched to the normally open side, the circuit is switched to a tap that further increases the number of turns of the primary side winding of the commercial power transformer 111, and the voltage on the secondary side of the commercial power transformer 111 is output according to the turns ratio. Go down. After that, if the DC voltage V1 changes due to a change in the voltage value of the commercial AC power supply 107 and the voltage of AIN falls below a second threshold (for example, V1 corresponds to 20V), the second relay 2b is immediately turned off. The relay drive circuit 5 is commanded to switch the contact of the second relay 2b to the normally closed side, and the circuit is switched to a tap where the number of turns of the primary side winding of the commercial power transformer 111 is reduced. The output of the secondary voltage increases depending on the turns ratio. The microcomputer 1 monitors the divided voltage of the DC voltage V1, and drives the first relay 2a and the second relay 2b to be sequentially turned on until the first threshold is exceeded when the first threshold is exceeded. If the value falls below the second threshold value, the contents for driving the second relay 2b and the first relay to be sequentially turned off until the second threshold value is exceeded are programmed.

  By using the commercial power transformer 111 that transforms at the commercial power frequency in this way, there is no continuous emission of high-frequency noise radio waves, and the DC voltage V1 changes according to the change in the input voltage value of the commercial AC power supply 107. However, since the first relay and the second relay are operated in accordance with the value of the DC voltage V1, a plurality of taps provided in the commercial power transformer 111 are automatically switched, and thus a desired output determined. The DC voltage V1, which is a voltage, can be within a predetermined range (here, 20 to 29V).

  In this embodiment, for convenience of explanation, the number of taps of the commercial power transformer 111 is three, but it goes without saying that the number of taps may be three or more. Further, the description is common to all the following embodiments.

(Embodiment 2)
The same parts as those in the conventional example and the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 3, the supplied DC power source 106 is connected to a cooling device electronic control device 104 equipped with a DC fan motor 105 as a circulating air blowing means provided in the cooling device 102 and a microcomputer 1 as a cooling device control means. The supplied commercial AC power source 107 is connected between the primary windings of the commercial power transformer 111 and serves as tap switching means for automatically switching a plurality of taps provided on the secondary winding of the commercial power transformer 111. One of the taps is connected to a normally closed terminal of a 1C contact type first relay 2a as a switching element of the first relay 2a, and a normally open terminal of the first relay 2a is provided on the secondary side winding of the commercial power transformer 111. The second relay 2b is connected to a common terminal of a second relay 2b of a 1C contact type as means for switching a plurality of taps. The normally closed terminal is connected to one of a plurality of other taps provided on the secondary winding of the commercial power transformer 111, and the normally open terminal of the second relay 2b is connected to the secondary winding of the commercial power transformer 111. Connected to the remaining one of the taps provided on the line. The common terminal of the first relay 2a and the common terminal of the secondary winding of the commercial power transformer 111 are connected to the first diode bridge 112 to be a full-wave rectified DC voltage V1 smoothed by the first capacitor 113, The DC fan motor 105 and the cooling device electronic control device 104 are connected.

  In the above configuration, the DC voltage V1 is generated by the AC voltage applied to the commercial power transformer 111 by the commercial AC power source 107, and the DC voltage V1 is divided by the first resistor 3 and the second resistor 4 to be a microcomputer. 1 is applied to the analog input terminal AIN, and the relay drive circuit 5 is instructed to turn on the first relay 2a as soon as the voltage of AIN exceeds a first threshold (for example, V1 corresponds to 29V). Then, the contact of the first relay 2a is switched to the normally open side, the circuit is switched to a tap that increases the number of turns of the primary side winding of the commercial power transformer 111, and the secondary side voltage of the commercial power transformer 111 is output according to the turns ratio. Go down. Thereafter, when the DC voltage V1 changes due to a change in the voltage value of the commercial AC power supply 107 and the voltage of AIN exceeds the first threshold value, the relay drive circuit 5 is instructed to immediately turn on the second relay 2b. The contact of the second relay 2b is switched to the normally open side, the circuit is switched to a tap that further increases the number of turns of the primary side winding of the commercial power transformer 111, and the voltage on the secondary side of the commercial power transformer 111 is output according to the turns ratio. Go down. After that, if the DC voltage V1 changes due to a change in the voltage value of the commercial AC power supply 107 and the voltage of AIN falls below a second threshold (for example, V1 corresponds to 20V), the second relay 2b is immediately turned off. The relay drive circuit 5 is commanded to switch the contact of the second relay 2b to the normally closed side, and the circuit is switched to a tap where the number of turns of the primary side winding of the commercial power transformer 111 is reduced. The output of the secondary voltage increases depending on the turns ratio.

  By using the commercial power transformer 111 that transforms at the commercial power frequency in this way, there is no continuous emission of high-frequency noise radio waves, and the DC voltage V1 changes according to the change in the input voltage value of the commercial AC power supply 107. However, since the first relay and the second relay are operated in accordance with the value of the DC voltage V1, a plurality of taps provided in the commercial power transformer 111 are automatically switched, and thus a desired output determined. The DC voltage V1, which is a voltage, can be within a predetermined range (here, 20 to 29V).

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

  As shown in FIG. 4, one phase of the supplied commercial AC power supply 107 is a 1C contact type as a switch element as a tap switching means for automatically switching a plurality of taps provided in the primary side winding of the commercial power transformer 111. Is connected to the common terminal of the first relay 2a, and the normally closed terminal of the first relay 2a is connected to one of a plurality of taps provided on the primary side winding of the commercial power transformer 111, The normally open terminal of the first relay 2 a is connected to the remaining one of a plurality of taps provided on the primary side winding of the commercial power transformer 111, and the other phase of the commercial AC power source 107 is the primary of the commercial power transformer 111. Connected to the common terminal of the winding. One of the taps is connected to the normally closed terminal of the second relay 2b of the 1C contact type as a switch element as a tap switching means for automatically switching a plurality of taps provided in the secondary winding of the commercial power transformer 111. The normally open terminal of the second relay 2b is connected to the remaining one of the plurality of taps provided on the secondary winding of the commercial power transformer 111. The common terminal of the second relay 2b and the common terminal of the secondary winding of the commercial power transformer 111 are connected to the first diode bridge 112 to be a full-wave rectified DC voltage V1 smoothed by the first capacitor 113, The DC fan motor 105 and the electronic control unit 104 are connected.

  In the above configuration, the DC voltage V1 is generated by the AC voltage applied to the commercial power transformer 111 by the commercial AC power source 107, and the DC voltage V1 is divided by the first resistor 3 and the second resistor 4 to be a microcomputer. 1 is applied to the analog input terminal AIN, and the relay drive circuit 5 is instructed to turn on the first relay 2a as soon as the voltage of AIN exceeds a first threshold (for example, V1 corresponds to 29V). Then, the contact of the first relay 2a is switched to the normally open side, the circuit is switched to a tap that increases the number of turns of the primary side winding of the commercial power transformer 111, and the secondary side voltage of the commercial power transformer 111 is output according to the turns ratio. Go down. Thereafter, when the DC voltage V1 changes due to a change in the voltage value of the commercial AC power supply 107 and the voltage of AIN exceeds the first threshold value, the relay drive circuit 5 is instructed to immediately turn on the second relay 2b. The contact of the second relay 2b is switched to the normally open side, the circuit is switched to a tap that increases the number of turns of the secondary winding of the commercial power transformer 111, and the voltage on the secondary side of the commercial power transformer 111 is output according to the turns ratio. Go down. After that, if the DC voltage V1 changes due to a change in the voltage value of the commercial AC power supply 107 and the voltage of AIN falls below a second threshold (for example, V1 corresponds to 20V), the second relay 2b is immediately turned off. The relay drive circuit 5 is commanded to switch the contact of the second relay 2b to the normally closed side, and the circuit is switched to a tap where the number of turns of the primary side winding of the commercial power transformer 111 is reduced. The output of the secondary voltage increases depending on the turns ratio.

  By using the commercial power transformer 111 that transforms at the commercial power frequency in this way, there is no continuous emission of high-frequency noise radio waves, and the DC voltage V1 changes according to the change in the input voltage value of the commercial AC power supply 107. However, since the first relay and the second relay are operated in accordance with the value of the DC voltage V1, a plurality of taps provided in the commercial power transformer 111 are automatically switched, and thus a desired output determined. The DC voltage V1, which is a voltage, can be within a predetermined range (here, 20 to 29V).

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

  As shown in FIGS. 5 and 6, one phase of the supplied commercial AC power supply 107 is used as a switch element as a tap switching means for automatically switching a plurality of taps provided on the primary side winding of the commercial power transformer 111. Connected to the common terminal of the first relay 2a which is a 1C contact type, and the normally closed terminal of the first relay 2a is connected to one of a plurality of taps provided on the primary side winding of the commercial power transformer 111. The normally open terminal of the first relay 2a is connected to the common terminal of the second relay 2b of the 1C contact type as means for switching a plurality of taps provided on the primary side winding of the commercial power transformer 111. The normally closed terminal of the second relay 2b is connected to one of a plurality of other taps provided on the primary side winding of the commercial power transformer 111, and the normal of the second relay 2b The open terminal is connected to the remaining one of the plurality of taps provided on the primary side winding of the commercial power transformer 111, and the other phase of the commercial AC power source 107 is connected to the common terminal of the primary winding of the commercial power transformer 111. Is done. The secondary winding of the commercial power transformer 111 is connected to the first diode bridge 112 and is full-wave rectified to be a DC voltage V1 smoothed by the first capacitor 113. The DC fan motor 105 and the electronic control device 104 Connected to. In addition, a voltage transformer 7 is connected to a commercial AC power source 107 in the input voltage detection device 6 as input AC voltage detection means for detecting a wide range of values of commercial AC voltage from 200 V to 250 V, and the voltage transformer 7 Is smoothed by the second diode bridge 8 and the second capacitor 9. The smoothed DC voltage V2 is applied to the analog input terminal AIN of the microcomputer 1 provided in the electronic control unit 104.

  In the above configuration, the relay driving circuit is configured to turn on the first relay 2a as soon as the AIN voltage of the microcomputer 1 exceeds a first threshold value (for example, the input voltage value of the commercial AC power supply 107 corresponds to 220V). 5, the contact of the first relay 2 a is switched to the normally open side, the circuit is switched to a tap that increases the number of turns of the primary side winding of the commercial power transformer 111, and the voltage on the secondary side of the commercial power transformer 111 is turned The output decreases with the ratio. Thereafter, when the DC voltage V1 changes due to a change in the voltage value of the commercial AC power supply 107 and the voltage of AIN exceeds the first threshold value, the relay drive circuit 5 is instructed to immediately turn on the second relay 2b. The contact of the second relay 2b is switched to the normally open side, the circuit is switched to a tap that further increases the number of turns of the primary side winding of the commercial power transformer 111, and the voltage on the secondary side of the commercial power transformer 111 is output according to the turns ratio. Go down. Thereafter, when the DC voltage V2 changes due to a change in the voltage value of the commercial AC power supply 107 and the voltage of AIN falls below a second threshold (for example, the input voltage value of the commercial AC power supply 107 corresponds to AC240V), the second voltage is immediately applied. The relay drive circuit 5 is commanded to turn off the relay 2b, the contact of the second relay 2b is switched to the normally closed side, and the circuit is switched to a tap that reduces the number of turns of the primary winding of the commercial power transformer 111. The output of the secondary side voltage of the power transformer 111 increases depending on the turn ratio.

  By using the commercial power transformer 111 that transforms at the commercial power frequency in this way, there is no continuous emission of high-frequency noise radio waves, and the DC voltage V1 changes according to the change in the input voltage value of the commercial AC power supply 107. However, the first relay 2a and the second relay 2b are set to the value of the DC voltage V2 by setting the turn ratio of the primary winding and the secondary winding of the commercial power transformer 111 to a desired output voltage. Since the plurality of taps provided in the commercial power transformer 111 are automatically switched by being operated accordingly, the DC voltage V1, which is a predetermined desired output voltage, is within a predetermined range (here, 20 to 29V). Can fit.

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

  As shown in FIG. 7, the supplied DC power source 106 is connected to a cooling device electronic control device 104 equipped with a DC fan motor 105 as a circulating air blowing means provided in the cooling device 102 and a microcomputer 1 as a cooling device control means. The supplied commercial AC power source 107 is connected between the primary windings of the commercial power transformer 111 and serves as tap switching means for automatically switching a plurality of taps provided on the secondary winding of the commercial power transformer 111. One of the taps is connected to a normally closed terminal of a 1C contact type first relay 2a as a switching element of the first relay 2a, and a normally open terminal of the first relay 2a is provided on the secondary side winding of the commercial power transformer 111. The second relay 2b is connected to a common terminal of a second relay 2b of a 1C contact type as means for switching a plurality of taps. The normally closed terminal is connected to one of a plurality of other taps provided on the secondary winding of the commercial power transformer 111, and the normally open terminal of the second relay 2b is connected to the secondary winding of the commercial power transformer 111. Connected to the remaining one of the taps provided on the line. The common terminal of the first relay 2a and the common terminal of the secondary winding of the commercial power transformer 111 are connected to the first diode bridge 112 to be a full-wave rectified DC voltage V1 smoothed by the first capacitor 113, The DC fan motor 105 and the cooling device electronic control device 104 are connected. In addition, a voltage transformer 7 is connected to a commercial AC power source 107 in the input voltage detection device 6 as input AC voltage detection means for detecting a wide range of commercial AC voltage values ranging from 200V to 250V. The secondary output voltage is smoothed by the second diode bridge 8 and the second capacitor 9. The smoothed DC voltage V2 is applied to the analog input terminal AIN of the microcomputer 1 provided in the electronic control unit 104.

  In the above configuration, the relay driving circuit is configured to turn on the first relay 2a as soon as the AIN voltage of the microcomputer 1 exceeds a first threshold value (for example, the input voltage value of the commercial AC power supply 107 corresponds to 220V). 5, the contact of the first relay 2 a is switched to the normally open side, the circuit is switched to a tap that increases the number of turns of the primary side winding of the commercial power transformer 111, and the voltage on the secondary side of the commercial power transformer 111 is turned The output decreases with the ratio. Thereafter, when the DC voltage V1 changes due to a change in the voltage value of the commercial AC power supply 107 and the voltage of AIN exceeds the first threshold value, the relay drive circuit 5 is instructed to immediately turn on the second relay 2b. The contact of the second relay 2b is switched to the normally open side, the circuit is switched to a tap that further increases the number of turns of the primary side winding of the commercial power transformer 111, and the voltage on the secondary side of the commercial power transformer 111 is output according to the turns ratio. Go down. Thereafter, when the DC voltage V2 changes due to a change in the voltage value of the commercial AC power supply 107 and the voltage of AIN falls below a second threshold (for example, the input voltage value of the commercial AC power supply 107 corresponds to AC240V), the second voltage is immediately applied. The relay drive circuit 5 is commanded to turn off the relay 2b, the contact of the second relay 2b is switched to the normally closed side, and the circuit is switched to a tap that reduces the number of turns of the primary winding of the commercial power transformer 111. The output of the secondary side voltage of the power transformer 111 increases depending on the turn ratio.

  By using the commercial power transformer 111 that transforms at the commercial power frequency in this way, there is no continuous emission of high-frequency noise radio waves, and the DC voltage V1 changes according to the change in the input voltage value of the commercial AC power supply 107. However, the first relay 2a and the second relay 2b are set to the value of the DC voltage V2 by setting the turn ratio of the primary winding and the secondary winding of the commercial power transformer 111 to a desired output voltage. Since the plurality of taps provided in the commercial power transformer 111 are automatically switched by being operated accordingly, the DC voltage V1, which is a predetermined desired output voltage, is within a predetermined range (here, 20 to 29V). Can fit.

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

  As shown in FIG. 8, one phase of the supplied commercial AC power supply 107 is a 1C contact type as a switch element as a tap switching means for automatically switching a plurality of taps provided on the primary side winding of the commercial power transformer 111. Is connected to the common terminal of the first relay 2a, and the normally closed terminal of the first relay 2a is connected to one of a plurality of taps provided on the primary side winding of the commercial power transformer 111, The normally open terminal of the first relay 2 a is connected to the remaining one of a plurality of taps provided on the primary side winding of the commercial power transformer 111, and the other phase of the commercial AC power source 107 is the primary of the commercial power transformer 111. Connected to the common terminal of the winding. One of the taps is connected to the normally closed terminal of the second relay 2b of the 1C contact type as a switch element as a tap switching means for automatically switching a plurality of taps provided in the secondary winding of the commercial power transformer 111. The normally open terminal of the second relay 2b is connected to the remaining one of the plurality of taps provided on the secondary winding of the commercial power transformer 111. The common terminal of the second relay 2b and the common terminal of the secondary winding of the commercial power transformer 111 are connected to the first diode bridge 112 to be a full-wave rectified DC voltage V1 smoothed by the first capacitor 113, The DC fan motor 105 and the electronic control unit 104 are connected. In addition, a voltage transformer 7 is connected to a commercial AC power source 107 in the input voltage detection device 6 as input AC voltage detection means for detecting a wide range of commercial AC voltage values ranging from 200V to 250V. The secondary output voltage is smoothed by the second diode bridge 8 and the second capacitor 9. The smoothed DC voltage V2 is applied to the analog input terminal AIN of the microcomputer 1 provided in the electronic control unit 104.

  In the above configuration, the relay driving circuit is configured to turn on the first relay 2a as soon as the AIN voltage of the microcomputer 1 exceeds a first threshold value (for example, the input voltage value of the commercial AC power supply 107 corresponds to 220V). 5, the contact of the first relay 2 a is switched to the normally open side, the circuit is switched to a tap that increases the number of turns of the primary side winding of the commercial power transformer 111, and the voltage on the secondary side of the commercial power transformer 111 is turned The output decreases with the ratio. Thereafter, when the DC voltage V1 changes due to a change in the voltage value of the commercial AC power supply 107 and the voltage of AIN exceeds the first threshold value, the relay drive circuit 5 is instructed to immediately turn on the second relay 2b. The contact of the second relay 2b is switched to the normally open side, the circuit is switched to a tap that further increases the number of turns of the primary side winding of the commercial power transformer 111, and the voltage on the secondary side of the commercial power transformer 111 is output according to the turns ratio. Go down. Thereafter, when the DC voltage V2 changes due to a change in the voltage value of the commercial AC power supply 107 and the voltage of AIN falls below a second threshold (for example, the input voltage value of the commercial AC power supply 107 corresponds to AC240V), the second voltage is immediately applied. The relay drive circuit 5 is commanded to turn off the relay 2b, the contact of the second relay 2b is switched to the normally closed side, and the circuit is switched to a tap that reduces the number of turns of the primary winding of the commercial power transformer 111. The output of the secondary side voltage of the power transformer 111 increases depending on the turn ratio.

  By using the commercial power transformer 111 that transforms at the commercial power frequency in this way, there is no continuous emission of high-frequency noise radio waves, and the DC voltage V1 changes according to the change in the input voltage value of the commercial AC power supply 107. However, the first relay 2a and the second relay 2b are set to the value of the DC voltage V2 by setting the turn ratio of the primary winding and the secondary winding of the commercial power transformer 111 to a desired output voltage. Since the plurality of taps provided in the commercial power transformer 111 are automatically switched by being operated accordingly, the DC voltage V1, which is a predetermined desired output voltage, is within a predetermined range (here, 20 to 29V). Can fit.

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

  As shown in FIGS. 9 and 10, the cooling device 102 that cools the heating element storage box 101 is supplied with a DC power source 106 that is a main power source and a commercial AC power source 107 that is an auxiliary power source. The supplied direct current power source 106 is connected to an electronic control device 104 equipped with a direct current fan motor 105 as a circulating air blowing means provided in the cooling device 102 and a microcomputer 1 as a cooling device control means. One phase of the supplied commercial AC power supply 107 is a 1C contact type as a switch element as a tap switching means for automatically switching a plurality of taps provided in the primary side winding of the commercial power transformer 111. Connected to the common terminal of the relay 2a, the normally closed terminal of the first relay 2a is connected to one of a plurality of taps provided on the primary side winding of the commercial power transformer 111, and the first relay 2a The normally open terminal is connected to the common terminal of the second relay 2b which is a 1C contact type as a switching element as a tap switching means, and the normally closed terminal of the second relay 2b is the primary side of the commercial power transformer 111. Connected to one of a plurality of other taps provided on the winding, the normally open terminal of the second relay 2b is connected to a plurality of pins provided on the primary side winding of the commercial power transformer 111. Is connected to the remaining one of the flops, other phases of the commercial AC power source 107 is connected to the common terminal of the primary winding of the commercial power transformer 111. The secondary winding of the commercial power transformer 111 is connected to the first diode bridge 112 for full-wave rectification of the output voltage and becomes a DC voltage V1 smoothed by the first capacitor 113, and the DC fan motor 105 and Connected to the electronic control unit 104. The electronic control device 104 includes a first resistor 3, a second resistor 4, and the microcomputer 1 as means for detecting an output voltage of the commercial power transformer 111. In addition, a voltage transformer 7 is connected to a commercial AC power source 107 in the input voltage detection device 6 as input AC voltage detection means for detecting a wide range of commercial AC voltage values ranging from 200V to 250V. The secondary output voltage is smoothed by the second diode bridge 8 and the second capacitor 9. The smoothed DC voltage V2 is applied to the analog input terminal AIN2 of the microcomputer 1 provided in the electronic control unit 104.

  In the above configuration, the divided voltage of the DC voltage V1 and the DC voltage V2 are applied to AIN1 and AIN2 of the microcomputer 1. First, when the voltage of AIN2 of the microcomputer 1 exceeds a first threshold value (for example, the input voltage value of the commercial AC power supply 107 is a value corresponding to 220V), the relay drive circuit 5 is turned on so that the first relay 2a is turned on immediately. Command, switch the contact of the first relay 2a to the normally open side, the circuit switches to a tap that increases the number of turns of the primary side winding of the commercial power transformer 111, and the voltage on the secondary side of the commercial power transformer 111 depends on the turns ratio Output decreases. Thereafter, when the DC voltage V2 changes due to a change in the voltage value of the commercial AC power supply 107 and the voltage of AIN2 exceeds the first threshold value, the relay drive circuit 5 is instructed to immediately turn on the second relay 2b. The contact of the second relay 2b is switched to the normally open side, the circuit is switched to a tap that further increases the number of turns of the primary side winding of the commercial power transformer 111, and the voltage on the secondary side of the commercial power transformer 111 is output according to the turns ratio. Go down. After that, when the DC voltage V2 changes due to a change in the voltage value of the commercial AC power supply 107 and the voltage of AIN2 falls below a second threshold (for example, the input voltage value of the commercial AC power supply 107 is equivalent to AC240V), the second voltage immediately follows. The relay drive circuit 5 is commanded to turn off the relay 2b, the contact of the second relay 2b is switched to the normally closed side, and the circuit is switched to a tap that reduces the number of turns of the primary winding of the commercial power transformer 111. The output of the secondary side voltage of the power transformer 111 increases depending on the turn ratio. Next, in this state, when the DC voltage V1 changes and the voltage of AIN1 exceeds a third threshold value (for example, corresponding to 29V for the voltage of V1), the relay drive circuit 5 is turned on immediately to turn on the second relay 2b. To switch the contact of the second relay 2b to the normally open side, the circuit is switched to a tap where the number of turns of the secondary winding of the commercial power transformer 111 is increased, and the voltage on the secondary side of the commercial power transformer 111 is the turns ratio. Decreases the output. After that, when the DC voltage V1 changes due to a change in the voltage value of the commercial AC power supply 107 and the voltage of AIN1 falls below a fourth threshold value (for example, the voltage of V1 corresponds to 20V), the second relay 2b is immediately turned off. The relay drive circuit 5 is commanded to switch the contact of the second relay 2b to the normally closed side, and the circuit is switched to a tap where the number of turns of the primary side winding of the commercial power transformer 111 is reduced. The output of the secondary voltage increases depending on the turns ratio.

  Thus, by using the commercial power transformer 111 that transforms at the commercial power frequency, there is no continuous high-frequency noise radio wave radiation, and the first relay 2a and the second relay 2a according to the change in the input voltage value of the commercial AC power source 107. The relay 2b of the commercial power supply transformer 111 is automatically operated by operating the first relay 2a and the second relay 2b in response to changes in the DC voltage V1. Therefore, the DC voltage V1, which is the determined desired output voltage, can fall within the determined range (20 to 29V in this case).

(Embodiment 8)
The same parts as those in the conventional example and the first and fourth embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 11, the supplied commercial AC power source 107 is connected between the primary windings of the commercial power transformer 111, and automatically switches a plurality of taps provided on the secondary winding of the commercial power transformer 111. One of the taps is connected to a normally closed terminal of a first relay 2a that is a 1C contact type as a switch element as a tap switching means, and the normally open terminal of the first relay 2a is connected to the secondary side of the commercial power transformer 111. Connected to the common terminal of the second relay 2b which is a 1C contact type as means for switching a plurality of taps provided in the winding, and the normally closed terminal of the second relay 2b is connected to the secondary side of the commercial power transformer 111 Connected to one of a plurality of other taps provided on the winding, the normally open terminal of the second relay 2b is connected to a plurality of secondary windings of the commercial power transformer 111. Tsu is connected to the remaining one of the flops. The common terminal of the first relay 2a and the common terminal of the secondary winding of the commercial power transformer 111 are connected to the first diode bridge 112 to be a full-wave rectified DC voltage V1 smoothed by the first capacitor 113, The DC fan motor 105 and the cooling device electronic control device 104 are connected. In addition, a voltage transformer 7 is connected to a commercial AC power source 107 in the input voltage detection device 6 as input AC voltage detection means for detecting a wide range of commercial AC voltage values ranging from 200V to 250V. The secondary output voltage is smoothed by the second diode bridge 8 and the second capacitor 9. The smoothed DC voltage V2 is applied to the analog input terminal AIN2 of the microcomputer 1 provided in the electronic control unit 104.

  In the above configuration, the divided voltage of the DC voltage V1 and the DC voltage V2 are applied to AIN1 and AIN2 of the microcomputer 1. First, when the voltage of AIN2 of the microcomputer 1 exceeds a first threshold value (for example, the input voltage value of the commercial AC power supply 107 is a value corresponding to 220V), the relay drive circuit 5 is turned on so that the first relay 2a is turned on immediately. Command, switch the contact of the first relay 2a to the normally open side, the circuit switches to a tap that increases the number of turns of the primary side winding of the commercial power transformer 111, and the voltage on the secondary side of the commercial power transformer 111 depends on the turns ratio Output decreases. Thereafter, if the DC voltage V1 changes due to a change in the voltage value of the commercial AC power source 107 and the voltage of AIN2 exceeds the first threshold value, the relay drive circuit 5 is instructed to immediately turn on the second relay 2b. The contact of the second relay 2b is switched to the normally open side, the circuit is switched to a tap that further increases the number of turns of the primary side winding of the commercial power transformer 111, and the voltage on the secondary side of the commercial power transformer 111 is output according to the turns ratio. Go down. After that, when the DC voltage V2 changes due to a change in the voltage value of the commercial AC power supply 107 and the voltage of AIN2 falls below a second threshold (for example, the input voltage value of the commercial AC power supply 107 is equivalent to AC240V), the second voltage immediately follows. The relay drive circuit 5 is commanded to turn off the relay 2b, the contact of the second relay 2b is switched to the normally closed side, and the circuit is switched to a tap that reduces the number of turns of the primary winding of the commercial power transformer 111. The output of the secondary side voltage of the power transformer 111 increases depending on the turn ratio. Next, in this state, when the DC voltage V1 changes and the voltage of AIN1 exceeds a third threshold value (for example, corresponding to 29V for the voltage of V1), the relay drive circuit 5 is turned on immediately to turn on the second relay 2b. To switch the contact of the second relay 2b to the normally open side, the circuit is switched to a tap where the number of turns of the secondary winding of the commercial power transformer 111 is increased, and the voltage on the secondary side of the commercial power transformer 111 is the turns ratio. Decreases the output. After that, when the DC voltage V1 changes due to a change in the voltage value of the commercial AC power supply 107 and the voltage of AIN1 falls below a fourth threshold value (for example, the voltage of V1 corresponds to 20V), the second relay 2b is immediately turned off. The relay drive circuit 5 is commanded to switch the contact of the second relay 2b to the normally closed side, and the circuit is switched to a tap where the number of turns of the primary side winding of the commercial power transformer 111 is reduced. The output of the secondary voltage increases depending on the turns ratio.

  Thus, by using the commercial power transformer 111 that transforms at the commercial power frequency, there is no continuous high-frequency noise radio wave radiation, and the first relay 2a and the second relay 2a according to the change in the input voltage value of the commercial AC power source 107. The relay 2b of the commercial power supply transformer 111 is automatically operated by operating the first relay 2a and the second relay 2b in response to changes in the DC voltage V1. Therefore, the DC voltage V1, which is the determined desired output voltage, can fall within the determined range (20 to 29V in this case).

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

  As shown in FIG. 12, one phase of the supplied commercial AC power supply 107 is a 1C contact type as a switch element as a tap switching means for automatically switching a plurality of taps provided on the primary side winding of the commercial power transformer 111. Is connected to the common terminal of the first relay 2a, and the normally closed terminal of the first relay 2a is connected to one of a plurality of taps provided on the primary side winding of the commercial power transformer 111, The normally open terminal of the first relay 2 a is connected to the remaining one of a plurality of taps provided on the primary side winding of the commercial power transformer 111, and the other phase of the commercial AC power source 107 is the primary of the commercial power transformer 111. Connected to the common terminal of the winding. One of the taps is connected to the normally closed terminal of the second relay 2b of the 1C contact type as a switch element as a tap switching means for automatically switching a plurality of taps provided in the secondary winding of the commercial power transformer 111. The normally open terminal of the second relay 2b is connected to the remaining one of the plurality of taps provided on the secondary winding of the commercial power transformer 111. The common terminal of the second relay 2b and the common terminal of the secondary winding of the commercial power transformer 111 are connected to the first diode bridge 112 to be a full-wave rectified DC voltage V1 smoothed by the first capacitor 113, The DC fan motor 105 and the electronic control unit 104 are connected. In addition, a voltage transformer 7 is connected to a commercial AC power source 107 in the input voltage detection device 6 as input AC voltage detection means for detecting a wide range of commercial AC voltage values ranging from 200V to 250V. The secondary output voltage is smoothed by the second diode bridge 8 and the second capacitor 9. The smoothed DC voltage V2 is applied to the analog input terminal AIN2 of the microcomputer 1 provided in the electronic control unit 104.

  In the above configuration, the divided voltage of the DC voltage V1 and the DC voltage V2 are applied to AIN1 and AIN2 of the microcomputer 1. First, when the voltage of AIN2 of the microcomputer 1 exceeds a first threshold value (for example, the input voltage value of the commercial AC power supply 107 is a value corresponding to 220V), the relay drive circuit 5 is turned on so that the first relay 2a is turned on immediately. Command, switch the contact of the first relay 2a to the normally open side, the circuit switches to a tap that increases the number of turns of the primary side winding of the commercial power transformer 111, and the voltage on the secondary side of the commercial power transformer 111 depends on the turns ratio When the output decreases, the DC voltage V1 changes and the voltage of AIN1 falls below a second threshold (for example, V1 corresponds to 20V), the relay drive circuit 5 is instructed to immediately turn on the second relay 2b. Then, the contact of the second relay 2b is switched to the normally open side, and the circuit is switched to a tap in which the number of turns of the secondary winding of the commercial power transformer 111 is increased. Output increases by the voltage of the secondary side turns ratio 11. Thereafter, when the DC voltage V2 changes due to a change in the voltage value of the commercial AC power supply 107 and the voltage of AIN falls below a second threshold (for example, the input voltage value of the commercial AC power supply 107 is equivalent to AC240V), the first voltage is immediately applied. The relay drive circuit 5 is commanded to turn off the relay 2a, the contact of the first relay 2a is switched to the normally closed side, and the circuit is switched to a tap that reduces the number of turns of the primary side winding of the commercial power transformer 111. The output of the secondary side voltage of the power transformer 111 increases depending on the turn ratio. In this state, if the DC voltage V1 changes and the voltage of AIN1 exceeds a fourth threshold value (for example, 29V for the voltage of V1), the relay drive circuit 5 is instructed to immediately turn off the second relay 2b. Then, the contact of the second relay 2b is switched to the normally closed side, the circuit is switched to a tap that reduces the number of turns of the secondary winding of the commercial power transformer 111, and the voltage on the secondary side of the commercial power transformer 111 is output according to the turns ratio. Go down.

  Thus, by using the commercial power transformer 111 that transforms at the commercial power frequency, there is no continuous high-frequency noise radio wave radiation, and the first relay 2a and the second relay 2a according to the change in the input voltage value of the commercial AC power source 107. The relay 2b of the commercial power supply transformer 111 is automatically operated by operating the first relay 2a and the second relay 2b in response to changes in the DC voltage V1. Therefore, the DC voltage V1, which is the determined desired output voltage, can fall within the determined range (20 to 29V in this case).

  Wiring and space saving can be easily realized by using a signal carrier that carries signals for power line carrier communication to the power supply line attached to the cooling device main body and controller, and air tightness such as airtight rooms and cargo containers of aircraft is realized. It can also be applied to air conditioning equipment such as storage boxes.

The block diagram which shows the structure of the power source stabilization circuit of the heat generating body storage case cooling device of Embodiment 1 of this invention. The circuit diagram which shows the structure of the output voltage detection means of Embodiment 1 of this invention. The block diagram which shows the structure of the power source stabilization circuit of the heat generating body storage case cooling device of Embodiment 2 of this invention. The block diagram which shows the structure of the power source stabilization circuit of the heat generating body storage case cooling device of Embodiment 3 of this invention. The block diagram which shows the structure of the power source stabilization circuit of the heat generating body storage case cooling device of Embodiment 4 of this invention. The circuit diagram which shows the structure of the input voltage detection means of Embodiment 4 of this invention The block diagram which shows the structure of the power source stabilization circuit of the heat generating body storage case cooling device of Embodiment 5 of this invention. The block diagram which shows the structure of the power source stabilization circuit of the heat generating body storage case cooling device of Embodiment 6 of this invention. The block diagram which shows the structure of the power source stabilization 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 input voltage detection means of Embodiment 7 of this invention, and an output voltage detection means The block diagram which shows the structure of the power source stabilization circuit of the heat generating body storage case cooling device of Embodiment 8 of this invention. The block diagram which shows the structure of the power source stabilization 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 Configuration diagram showing the configuration of a conventional heating element storage case cooling device Block diagram showing the configuration of the power stabilization circuit of the conventional heating element storage case cooling device Block diagram showing the configuration of the power stabilization circuit of the conventional heating element storage case cooling device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Microcomputer 2a 1st relay 2b 2nd relay 3 1st resistor 4 2nd resistor 5 Relay drive circuit 6 Input voltage detection apparatus 7 Voltage transformer 8 2nd diode bridge 9 2nd capacitor | condenser 101 Heating body Storage box 102 Cooling device 104 Electronic control unit 105 DC fan motor 106 DC power source 107 Commercial AC power source 111 Commercial power source transformer 112 First diode bridge 113 First capacitor

Claims (13)

A cooling device for cooling a heating element accommodating box making, the provided cooling apparatus, a DC motor and a cooling device control as waste heat circulating blower means outside air inside air temperature by circulating inside air and outside air of the heating element accommodating box making In the heating element storage case cooling device provided with the electronic control device as the means, the cooling device includes a main power supply device which is a DC power supply, and an auxiliary power supply which transforms and smoothes the supplied commercial power supply to rectify and smooth the DC power The auxiliary power supply device is provided with a commercial power transformer as a transforming means for transforming the AC voltage supplied from the heating element storage box into a desired voltage range, and a secondary winding side of the commercial power transformer A tap switching means for automatically switching a plurality of taps provided in the winding of the commercial power transformer is provided as a means for keeping the smoothed DC voltage after the full-wave rectifier circuit connected to a desired output voltage range. , Stabilization of the heat generating member accommodating box making cooling device and supplying the voltage to assist the main power supply from the commercial power transformer when the main power supply is cut off to the electronic control unit and the DC motor Power supply circuit . 2. The heating element storage case cooling apparatus according to claim 1, wherein the tap switching means for automatically switching a plurality of taps provided in the winding of the commercial power transformer includes output voltage detection means for detecting the output voltage of the commercial power transformer. Stabilized power supply circuit. The stability of the heating element housing case cooling apparatus according to claim 1 or 2, wherein the output voltage detecting means operates a plurality of switch elements of the tap switching means connected to the plurality of taps provided on the primary side winding of the commercial power transformer. Power circuit. 3. The stabilized power supply for the heating element housing cooling device according to claim 1, wherein the switch element of the tap switching means connected to the plurality of taps provided on the secondary winding of the commercial power transformer is operated by the output voltage detecting means. circuit. 3. A heating element housing box according to claim 1, wherein the switch element of the tap switching means connected to the plurality of taps provided on the primary side winding and the secondary side winding of the commercial power transformer is operated by the output voltage detecting means. Stabilized power supply circuit for cooling device. Input AC voltage for detecting a wide range of commercial AC voltage values ranging from 200V to 250V in the nominal voltage supplied from the heating element housing to the tap switching means for automatically switching a plurality of taps provided on the winding of the commercial power transformer. The stabilized power circuit of the heating element storage case cooling apparatus according to claim 1, further comprising a detection unit. The heating element housing case cooling apparatus according to claim 1 or 6, wherein a plurality of switch elements of the tap switching means connected to the plurality of taps provided on the primary side winding of the commercial power transformer are operated by the input AC voltage detection means. Stabilized power circuit. The heating element housing case cooling device according to claim 1 or 6, wherein the switching element of the tap switching means connected to the plurality of taps provided in the secondary winding of the commercial power transformer is operated by the input AC voltage detection means. Power supply circuit. The heating element storage according to claim 1 or 6, wherein the switch element of the tap switching means connected to the plurality of taps provided on the primary side winding and the secondary side winding of the commercial power transformer is operated by the input AC voltage detection means. Stabilized power supply circuit for box cooling system. Input AC voltage for detecting a wide range of commercial AC voltage values ranging from 200V to 250V in the nominal voltage supplied from the heating element housing to the tap switching means for automatically switching a plurality of taps provided on the winding of the commercial power transformer. The stabilized power circuit of the heating element housing case cooling apparatus according to claim 1, further comprising: an output voltage detecting means for detecting an output voltage of the commercial power transformer and a detecting means. The heating element according to claim 1 or 10, wherein the plurality of switch elements of the tap switching means connected to the plurality of taps provided in the primary winding of the commercial power transformer are operated by the input AC voltage detection means and the output voltage detection means. Stabilized power circuit for storage box cooling system. The heating element according to claim 1 or 10, wherein the plurality of switch elements of the tap switching means connected to the plurality of taps provided in the secondary winding of the commercial power transformer are operated by the input AC voltage detection means and the output voltage detection means. Stabilized power circuit for storage box cooling system. 11. The switch element of the tap switching means connected to a plurality of taps provided on the primary side winding and the secondary side winding of the commercial power transformer is operated by the input AC voltage detection means and the output voltage detection means. The stabilized power supply circuit of the heating element storage box cooling device described.

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