JPH0745949B2 - Centralized control device for air conditioner and centralized control method thereof - Google Patents

Description

TECHNICAL FIELD The present invention relates to a centralized control device for a plurality of air conditioners and a centralized control method thereof.

2. Description of the Related Art In recent years, with the increase in the number of devices that control using a microcomputer, there is a growing tendency that the coming of the new media era in which one centralized control device controls a plurality of controlled devices is about to come. Then, the wave is getting worse in the home, and the situation of using the centralized control device in the air conditioner is increasing. On the other hand, on the power supply side in the home, it is necessary to strengthen the supply equipment to cope with the load peaks associated with the addition of air conditioners and loads other than air conditioners. Due to the difference in usage characteristics, there are situations in which the benefits of consumers are hindered, such as the operation of overcurrent protection devices.

Problems to be Solved by the Invention When electric appliances for equipment other than the air conditioner main body are fully used in a general household or under air-conditioning conditions under severe load,
When the compressor is started, when the air conditioner equipped with a frequency converter is started, or when the compressor is operated near the set maximum frequency, the current value flowing in the overcurrent protection device exceeds the allowable amount. , OFF operation, the feeling when using the air conditioner was deteriorated, and electrical appliances other than the air conditioner stopped, causing inconvenience in use.

The present invention is to solve the above-mentioned conventional problems, regardless of the magnitude of the current value other than the air conditioner, at the start of operation of the air conditioner, and the overcurrent protection device by charging an electric appliance other than the air conditioner. The purpose is to eliminate the OFF operation.

Means for Solving the Problems In order to achieve the above object, the present invention sets a current detection unit that detects a total value of a load current flowing in wiring of a house and a current value that lowers an operating frequency of an air conditioner. No. 1 suppression current setting means, second suppression current setting means for setting a current value for stopping the compressor, and third suppression current setting means for setting a current value for stopping operation of the air conditioner,
A fourth suppression current setting means for setting a current value for stopping the operation of a plurality of air conditioners, and a third current value for setting a current value for restarting the operation of the air conditioner suppressed by the suppression current setting means. A return current setting means, a second return current setting means for setting a current value for returning the operation of the air conditioner from the compressor stopped state, and a current value for returning from the operation with the lowered operating frequency to the normal operation frequency. First reset current value setting means for setting, wiring system setting means for setting which power line each air conditioner is connected to, and connection to the same power supply line determined by the wiring system setting means The operation priority setting means for setting the operation priority between the plurality of air conditioners, and the voltage division setting means for setting the type of the voltage of the commercial power supply to the air conditioner for each air conditioner. Output and the first of said current detecting means
And a second comparing means for comparing the output of the current detecting means and the output of the second suppressing current setting means, and an output of the current detecting means. Third comparing means for comparing the outputs of the third suppressing current setting means, output of the current detecting means and the fourth
Of the suppression current setting means, fifth comparison means for comparing the output of the current detection means with the output of the first return current setting means, and the output of the current detection means And a sixth comparing means for comparing the output of the second return current setting means with each other, and a seventh comparing means for comparing the output of the current detecting means with the output of the third return current setting means. A centralized control device for controlling a plurality of air conditioners according to the operation priority set by the operation priority setting means based on the output of the comparison means. The present invention also supplies power to at least one air conditioner and other devices via an overcurrent protection device that stops energization when an overcurrent flows, and when operating the air conditioner,
When the current of the power supply line to which the air conditioner and other devices are connected is measured and it is detected that this current value exceeds the first suppression current set value, the operation priority order between the air conditioners is determined. When it is detected that the operating frequency of the air conditioner is decreased in order from the lowest and the current value exceeds the second suppression current setting value, at least the compression of the air conditioner is performed in order from the lowest operation priority. When the operation of the machine is stopped and it is detected that the current value exceeds the third suppression current setting value,
At least 1 in order from the one with the lowest operation priority
When the operation of one of the air conditioners is stopped and it is detected that the current value exceeds the fourth suppression current value, all of the plurality of air conditioners connected via the overcurrent protection device are stopped. , When it is detected that the current value is lower than the first reset current setting value, the operation frequency is reduced in order from the one with the highest operation priority among the air conditioners, and the normal value is restored. When it detects that the current value falls below the second set value for the return current, the operation of the air conditioner in which at least the compressor is stopped is returned to the normal operation in order from the one having the highest operation priority, and the current value is the third. When it is detected that the return current value has fallen below, the operation of the air conditioner whose operation has been stopped is returned to the normal operation in order from the one having the highest operation priority. Further, the present invention supplies power to at least one air conditioner and other devices via an overcurrent protection device that stops energization when an overcurrent flows, and when operating the air conditioner, the air conditioner is operated. When the current value of the power supply line to which the and other devices are connected is measured and it is detected that this current value exceeds the first suppression current setting value, the operation priority order of the air conditioners is low. When it is detected that the current value exceeds the second suppression current setting value, the compressors are stopped in order, and the operation of at least the compressor of the air conditioner is stopped in order from the one with the lowest operation priority, and the current is stopped. When it is detected that the value exceeds the third suppression current value, all the plurality of air conditioners connected through the overcurrent protection device are stopped, and the current value becomes the first return current setting value. When it is detected that there is less than When it is detected that the current value is lower than the second reset current setting value, the compressors that have been stopped in order from the highest operation priority order are operated, and at least the compressors are stopped in order from the highest operation priority order. The operation of the air conditioner is restored to normal operation, and the current value is the third
When it is detected that the return current value has fallen below, the operation of the air conditioner whose operation has been stopped is returned to the normal operation in order from the one having the highest operation priority. Furthermore, in addition to the above means, the present invention measures the current of the power supply line to which the air conditioner and other devices are connected for each system of the power supply, and compares each current value with each set current value, For each system, each air conditioner is controlled according to the operation priority order of the air conditioners in the system.

Action The present invention monitors the use state of electric power by issuing the load control command to the air conditioner regardless of the magnitude of the current value of the air conditioner and the electric appliances other than the air conditioner by the above means, and uses the electric power. Control the air conditioner according to the super degree,
It is possible to eliminate the OFF operation of the overcurrent protection device.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block connection diagram of a centralized control device according to an embodiment of the present invention.

In the figure, 16 is an air conditioner operating terminal device, 19 is a centralized control device body for controlling a plurality of air conditioner operating terminal devices 16, and 17 is an air conditioner. 1 is a central processing unit (hereinafter CP
Reference numeral 2 denotes a signal transmitting / receiving unit for connecting a plurality of air conditioner operating terminals 16 and a central control device body 19. 3,
Reference numeral 4 is a transmission line that connects a plurality of air conditioner terminals to the central control device main body 19. Reference numeral 5 denotes a memory unit including a program memory and a data memory.

Reference numerals 8, 8 ′ and 8 ″ represent commercial power supplies to be supplied to the air conditioner, and represent single-phase three-wire main lines.
Connected between 8'and 8'-8 "respectively. 11 indicates a CT circuit for detecting the total value of the load current of the equipment connected to each house, and CT transformers 11-1 and 11-2 of the current detection section. ,
The rectifiers 11-3 and 11-4 for rectifying the outputs of the CT transformers 11-1 and 11-2, and 11-7 and 11-8 are the rectifiers 11
-3, 11-4 smoothing condenser 11-7,
Reference numeral 11-8 is composed of the smoothing capacitor, discharge resistors 11-5 and 11-6. Reference numeral 12 is a wiring system setting means for selecting whether the air conditioner connected to the commercial power supply is connected to the commercial power supply 8-8 'or 8'-8 ", and at least the connection system setting means is provided. In the present embodiment, the CT transformer 11-1 is for detecting the current of the load connected between the commercial power sources 8-8 '. , Also CT
The transformer 11-2 is for detecting the current of the load connected between the commercial power supplies 8'-8 ", and the setting by the wiring system setting means 12 is for the system between the commercial power supplies 8-8 'and 8'-8". This is performed when the air conditioner is connected, and the state of the switch, for example, by the wiring system setting means 12 is read via the CPU 1. Reference numeral 6 is a suppression current setting means for controlling the current flowing through the wiring of the house, and 20 is a return current setting means for returning the air conditioner in the suppression operation state to the original operation state.

The suppression current value and the return current value are set by, for example, dividing the DC voltage by resistors 6-1 to 6-5 and 20-1 to 20-4 to generate a voltage equal to the suppression and return current value.

In the embodiment, the voltage that determines the first suppression current value is the voltage that determines the second suppression current value, and the voltage that determines the second suppression current value is the resistances 6-4 and 6-3. The voltage that determines the third suppression current value is obtained from the intersection point of the resistor 6-3, and the voltage that determines the fourth suppression current value is obtained from the intersection point of the resistor 6-3 and 6-2.
Each is taken out from the intersection of 2 and 6-1. On the other hand, the voltage for determining the first return current value is set to the resistance 20-3, the voltage for determining the second return current value is set at the intersection of the resistors 20-4 and 20-3.
From the intersection of 20-2, the voltage that determines the third return current value is extracted from the intersection of the resistors 20-2 and 20-1.

The voltage at each level that determines the suppression current value and return current value described above is a comparator for each level provided for each system L ₁ and L ₂ .
It is connected to ten, for example, − side input terminals. Further, the output of each system of the current detecting means 11 is connected to the + side input terminal of the comparator.

Reference numeral 21 denotes an operation mode display section for displaying each suppression operation state of the air conditioner such as stopping each air conditioner or at least stopping the compressor or decelerating the operation frequency by each output of the comparison means 10 described above. Shown, for example, when decelerating the operating frequency and at least stopping the compressor, blinking the display unit corresponding to the air conditioner, turning on the display unit during normal operation, and displaying the display when the air conditioner is stopped. Turn off the part.

13 indicates a voltage division setting means depending on the input voltage difference of the air conditioner, which is provided corresponding to each air conditioner,
For example, set 100V / 200V. For example, a 200V input air conditioner is connected between power supply lines 8-8 ″ as shown in 17 ′ of FIG. ₁ , and the current consumed by the air conditioner is both L ₁ and L ₂ . Therefore, a wiring system setting means for setting which of the power supply lines L ₁ and L ₂ is connected is not particularly required like an air conditioner of 100 V input.
In the 200V-input air conditioner, the suppression operation described below is performed from the outputs of both CT transformers 11-1 and 11-2 that detect the currents flowing in the power supply lines L ₁ and L ₂ .

Reference numeral 22 is a room temperature setting means for setting the operating room temperature of the air conditioner, and a plurality of key switches (not shown) corresponding to the air conditioner 17 are arranged.

Reference numeral 15 is an operation priority setting unit that sets the operation priority between the air conditioners connected to the same wiring system, which is set by the wiring system setting unit 12.

In the figure, the setting switches A, B, C and D of the operation priority setting means 15 are provided corresponding to the air conditioners. For example, each of the A, B, C, and D switches is, for example, a code switch of several bits, and the priority of the air conditioner is determined by this setting switch.

Further, when each output of the comparator 10 is read via the CPU 1 and the value of the current flowing through the wiring of the house detected by the CT circuit is larger than the output of the fourth suppression current setting means, For each system in which a plurality of air conditioners are connected to the wiring of the house, a signal for simultaneous stop is sent to the signal transmitting / receiving unit 2
Is transmitted to each air conditioner operation terminal device 6 through the, and the current value flowing in the wiring of the house detected by the CT circuit is
When it is smaller than the output of the third reset current setting means, the air conditioner that has output the simultaneous stop signal is sent to each air conditioner operating terminal device 16 via the signal transmitting / receiving unit 2 to the original operating state. The signals to be restored are output in order from the air conditioner with the highest operation priority. The signal transmitting / receiving unit 2 is connected to the air conditioner operating terminal device 16 via transmission lines 3 and 4, and is connected between the signal transmitting / receiving unit 2 on the central control device side and the air conditioner operating terminal device 16. The exchange of signals is performed. Less than,
The same operation is performed for the first to third suppression currents and the first to second return current setting means, which will be described in detail below.

Further, when the value of the current flowing through the house wiring detected by the CT circuit is larger than the output of the third suppression current setting means, the air conditioner having a lower operation priority among the plurality of air conditioners. The air conditioner is stopped until the current value detected by the CT circuit becomes less than or equal to the third suppression current value for each power line system in order from the machine.

Further, when the value of the current flowing through the wiring of the house detected by the CT circuit is larger than the output of the second suppression current setting means, an air conditioner having a lower operation priority among the plurality of air conditioners. In order from the machine, for each system of each power line,
At least the compressor of the air conditioner is stopped until the current value detected by the CT circuit becomes equal to or less than the second suppression current value.

Further, when the value of the current flowing through the wiring of the house detected by the CT circuit is larger than the output of the first suppression current setting means, an air conditioner having a low operation priority among the plurality of air conditioners. In order from the above, the CT for each system of each power line
Until the current value detected by the circuit becomes less than or equal to the first suppression current value, the operating frequency is reduced for the air conditioner equipped with the frequency conversion device, and at least the compressor is used for the general-purpose air conditioner. Stop.

Further, when the value of the current flowing through the wiring of the house detected by the CT circuit is smaller than the output of the second return current setting means, the air conditioner having a higher operation priority among the air conditioners of the above number Sequentially, for each power line system, the operation of the compressor, which has once been stopped, is restarted until the current value detected by the CT circuit becomes a value substantially equal to the second reset current setting value.

Further, when the value of the current flowing through the wiring of the house detected by the CT circuit is smaller than the output of the first return current setting means, the air conditioners having higher operation priority among the plurality of air conditioners are sequentially ordered. For each power line system, until the current value detected by the CT circuit becomes approximately equal to the first reset current setting value, the operating frequency of To the normal operating frequency of, and for a general-purpose air conditioner, restart the operation of the compressor.

Next, the suppression of 200V input air conditioner and the return operation will be described.

The air conditioner of 200 V input does not need to be set by the wiring system setting means 12 as described above. Therefore, the air conditioner is detected by the CT circuit 11, and further, each of the comparing means 10 described above. Based on the output, the above-described suppression and restoration operation is performed in accordance with the operation priority order determined by the operation priority setting means 15 set between the air conditioners. Operation priority setting means, as above described, since the respectively provided L _1, the system of L _2, but the actuating priority two systems of L _1, L ₂ is to be set, L ₁ And L ₂ will follow the set value of the system. Reference numeral 144 is a model classification setting means for classifying an air conditioner equipped with an operating frequency converter and an air conditioner not equipped with the operating frequency converter.

The suppression operation and the return operation of the air conditioner are controlled as described above.

23 shows each operating state of each air conditioner that is suppressed and operated by the value of the current flowing through the house wiring described above, and a display unit that displays the operating devices for each air conditioner, for example, decelerating the operating frequency and At least when the compressor is stopped, the display corresponding to the air conditioner blinks, during normal operation, the display unit is turned on, and when the air conditioner is stopped, the display unit is turned off.

Reference numeral 24 is a means for setting the rated current or the allowable current of the overcurrent protection device as described above.
When (A) is set, the value set by the first to fourth suppression current value means sets the ratio of X (A) described above.

EFFECTS OF THE INVENTION The centralized control method for an air conditioner according to the present invention is such that, when a plurality of air conditioners and electric appliances other than the air conditioner are used, the current value flowing through the overcurrent protection device is its allowable amount. It is the one that solves the inconvenience of use, such as the operation exceeding the above, turning off, making the air conditioner feel uncomfortable, and stopping electric appliances other than the air conditioner. The effects are described below. To do.

1) When an overcurrent flows through the overcurrent protection device, the overcurrent protection device is not turned off, so that the suppression operation is performed according to the level of the overcurrent instead of simply stopping the air conditioner. The number of unnecessary stop operations of the air conditioner can be reduced, and the feeling of the air conditioner can be prevented from deteriorating.

2) When an overcurrent flows through the overcurrent protection device, the air conditioner is restrained to prevent the electric appliances other than the air conditioner from being unnecessarily stopped.

3) By setting the model classification whether the operating frequency converter is installed or not, when overcurrent flows through the overcurrent protection device, it is possible to easily perform suppression operation between air conditioners of different models. is there.

[Brief description of drawings]

FIG. 1 shows a block connection diagram of the present invention. 1 ... CPU, 2 ... Signal transmission / reception section, 3-4 ... Transmission path, 5 ... Memory section, 6 ... Suppression current setting means, 7 ...
Overcurrent protection device, 8, 8 ', 8 "... Commercial power line, 9 ...
… Commercial power input terminal, 10 …… Comparison means, 11 …… CT circuit,
11-1, 11-2 ... CT transformer, 11-3, 11-4 ... Rectifier, 11-5, 11-6 ... Discharge resistor, 11-7, 11-8
...... Smoothing capacitors, 12 ・ ・ ・ Wiring system setting means, 13 ・ ・ ・
… Voltage classification setting means, 14 …… Model classification setting means, 15 ……
Operation priority setting means, 16 ... Air conditioner operation terminal,
17 …… Air conditioner, 18 …… Air conditioner operation remote controller,
19 ... Centralized control device, 20 ... Return current setting means, 21 ...
Operation mode display, 22 ... Room temperature setting means, 23 ... Air conditioner operation terminal display.

Claims (7)

[Claims] 1. A current detecting means for detecting a total value of a load current flowing through a wiring of a house, a first suppressing current setting means for setting a current value for lowering an operating frequency of an air conditioner, and a compressor. Second suppression current setting means for setting a current value, third suppression current setting means for setting a current value for stopping the operation of the air conditioner, and current values for stopping the operation of a plurality of air conditioners are set. A fourth suppression current setting means, a third return current setting means for setting a current value for restarting the operation of the air conditioner that has been suppressed and operated by the suppression current setting means, and an air conditioner from the compressor stopped state. Second return warm flow setting means for setting a current value for returning the operation of No. 1, first return current value setting means for setting a current value for returning to the normal operation frequency from the operation in which the operation frequency is lowered, and each air Which harmony machine Wiring system setting means for setting whether to connect to the power supply line, and operation priority setting for setting operation priority between a plurality of air conditioners connected to the same power supply line determined by the wiring system setting means Means, a voltage division setting means for setting the type of the voltage of the commercial power source supplied to the air conditioner for each air conditioner, and the output of the current detection means and the output of the first suppression current setting means. The second comparing means for comparing the output of the current detecting means with the output of the second suppressing current setting means, and the output of the current detecting means with the third suppressing current setting means. Third comparing means for comparing outputs, fourth comparing means for comparing the output of the current detecting means and output of the fourth suppressing current setting means, output of the current detecting means and the first return Output of current setting means The first to compare the 5
And a sixth comparing means for comparing the output of the current detecting means and the output of the second return current setting means, and the output of the current detecting means and the output of the third return current setting means. An air conditioner provided with a seventh comparing means for comparing and a centralized control device for controlling a plurality of air conditioners according to the operation priority set by the operation priority setting means based on the outputs of these comparing means. Centralized control device. 2. The centralized control device for an air conditioner according to claim 1, further comprising voltage division setting means for setting a difference in input voltage of each air conditioner. 3. The centralized control device for an air conditioner according to claim 1, wherein the operating state of each air conditioner is displayed. 4. The centralized control device for an air conditioner according to claim 1, further comprising means for setting a rated current or an allowable current of the overcurrent protection device connected to the house wiring. 5. When operating an air conditioner by supplying power to at least one air conditioner and other devices through an overcurrent protection device that stops energization when an overcurrent flows,
When the current of the power supply line to which the air conditioner and other devices are connected is measured and it is detected that this current value exceeds the first suppression current set value, the operation priority order between the air conditioners is determined. When it is detected that the operating frequency of the air conditioner is decreased in order from the lowest and the current value exceeds the second suppression current setting value, at least the compression of the air conditioner is performed in order from the lowest operation priority. When the operation of the machine is stopped and it is detected that the current value exceeds the third suppression current setting value,
At least 1 in order from the one with the lowest operation priority
When the operation of one of the air conditioners is stopped and it is detected that the current value exceeds the fourth suppression current value, all of the plurality of air conditioners connected via the overcurrent protection device are stopped. , When it is detected that the current value is lower than the first reset current setting value, the operation frequency is lowered in order from the one having the highest operation priority among the air conditioners, and the operation is returned to the normal operation, When it is detected that the current value is lower than the second reset current setting value, the operation of the air conditioner in which at least the compressor is stopped is returned to the normal operation in order from the one having the highest operation priority, and the current value is changed. A centralized control method for an air conditioner, wherein when it is detected that the current value is lower than a third return current value, the operations of the air conditioners that have been stopped in order from the one with the highest operation priority are returned to the normal operation. 6. When operating an air conditioner by supplying power to at least one air conditioner and other devices via an overcurrent protection device that stops energization when an overcurrent flows,
When the current of the power supply line to which the air conditioner and other devices are connected is measured and it is detected that this current value exceeds the first suppression current set value, the operation priority order between the air conditioners is determined. The compressor is stopped in order from the lowest one, and the current value becomes the second
When it is detected that the suppression current set value is exceeded, the operation of at least the compressor of the air conditioner is stopped in order from the one with the lowest operation priority, and the current value exceeds the third suppression current value. When it is detected that all of the plurality of air conditioners connected via the overcurrent protection device are stopped and it is detected that the current value is below the first reset current setting value, the air conditioner mutual The compressors that have been stopped in descending order of operation priority are operated, and when it is detected that the current value has dropped below the second reset current setting value, at least the compressors in order of descending operation priority are operated. When the operation of the stopped air conditioner is returned to the normal operation, and when it is detected that the current value is lower than the third return current value, the operation of the air conditioner that has been stopped in order from the one having the higher operation priority order. Return to normal operation, empty Centralized control method of conditioner. 7. The current of the power supply line to which the air conditioner and other devices are connected is measured for each system of the power supply, and each current value is compared with each set current value, and the current is measured for each system. 7. The centralized control method for an air conditioner according to claim 5, wherein each air conditioner is controlled in accordance with the operation priority order of the air conditioners in the system.