JP2697238B2 - Central control device for air conditioner - Google Patents

Description

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 control using a microcomputer, the trend of a new media era, in which one centralized control device controls a plurality of controlled devices, is coming soon. And the waves are breaking in homes, and the situation of using the central control device in air conditioners is increasing. On the other hand, on the power supply side in the home, it is necessary to increase the supply facilities in order to cope with the load peak due to the increase in loads other than air conditioners and air conditioners. Due to the difference in usage characteristics, there are situations in which the benefits of consumers are obstructed, such as the operation of an overcurrent protection device.

Problems to be Solved by the Invention When household appliances are fully used for appliances other than the air conditioner body, or under severe air conditions under heavy load,
When the compressor is started or when the air conditioner equipped with the frequency converter starts operating, the current flowing through the overcurrent protection device exceeds its allowable amount, it turns off, and the feeling when using the air conditioner is reduced. It caused inconvenience in use, such as exacerbation and shutdown of appliances other than air conditioners.

The present invention solves the above-mentioned conventional problems, regardless of the magnitude of the current value other than the air conditioner, at the start of the operation of the air conditioner, and the overcurrent protection device by turning on the electric appliances other than the air conditioner. The purpose is to eliminate off operation. Further, it is possible to cope with a difference in a power supply method peculiar to a power company that supplies electricity, for example, a storage area where a current limiter is used in addition to a general overcurrent protection device for a trunk line. Regarding the difference between the protection operation of a general overcurrent protection device and the protection operation of a current limiter, for example, in the operation of a general overcurrent protection device in a single-phase three-wire system, current detection is performed independently for each line, and When the current value specified by the overcurrent protection device is exceeded, an overcurrent protection operation is performed.

On the other hand, the operation of the current limiter performs an overcurrent protection operation when the current value of the vector composition of the two line currents exceeds the current value specified by the current limiter.

Means for Solving the Problems In order to achieve the above object, the present invention provides at least two systems of current detecting means for detecting the total value of load current flowing in a house wiring, and reducing the operating current of an air conditioner. First suppression current setting means for setting a current value for lowering the operating frequency (the air conditioner equipped with a frequency conversion device) to be operated, and second suppression current setting means for setting at least a current value for stopping the compressor; Third suppression current setting means for setting a current value for stopping the operation of the air conditioner, fourth suppression current setting means for setting a current value for stopping the operation of the plurality of air conditioners, and the suppression operation setting First return current setting means for setting a current value for restarting the operation of the air conditioner suppressed by the means, and monitoring the operation of the air conditioner restarted by the first return current setting means for a certain period of time. And
A second return for setting a current value for restarting the operation of the corresponding air conditioner that is performing the suppression operation when the current value set by any of the suppression current setting means 1 to 4 is exceeded again within a certain period. And a current setting unit. Regarding the return current setting, as a second solution, the operation of the air conditioner restarted by the first return current setting means is monitored for a certain period of time, and any of the suppression current setting means 1 to 4 is again performed within a certain period of time. Each time the current value exceeds the current value determined by the first return current setting means.
A plurality of return current setting means, furthermore, a current detection means for detecting a load current flowing through at least a branch overcurrent protection device to which the air conditioner is connected, and a current value for lowering the operating frequency of the air conditioner. 1b suppression current setting means for setting, 2b suppression current setting means for setting at least a current value for stopping the compressor, and 3b suppression current setting for setting a current value for stopping operation of the air conditioner Means, 1b return current setting means for setting a current value for restarting the operation of the air conditioner suppressed by the suppression current setting means, and air conditioner restarted by the 1b return current setting means. When the current value exceeds the current value determined by any of the suppression current setting means 1b to 3b again within a predetermined period, and the current value for restarting the operation of the corresponding air conditioner is Return current setting And a setting means.

Regarding the return current setting, as a second solution, the operation of the air conditioner restarted by the 1b return current setting means is monitored for a certain period of time, and any one of the return current setting means 1b to 3b is again performed within a certain period of time. Each time the current value determined by the above is exceeded, a plurality of return current setting means of 1bb to nbb sequentially increased from the current value determined by the return current setting means of the 1b is further provided. For example, when the power line is pulled into the house, when the operation is performed in a single-phase three-wire system, one of the three wires
Although will be in a line neutral line in the other two-wire two systems of power supply lines (tentatively referred to as L ₁ system and L ₂ based) is constructed,
Wiring system setting means for setting which of the power supply lines each air conditioner is connected to, and mutual operation of a plurality of air conditioners connected to the same power line determined by the wiring setting means Operating priority setting means for setting a priority order, voltage division setting means for setting a voltage division of commercial power supplied to the air conditioner for each air conditioner, an output of the current detection means, First comparing means for comparing the output of the suppressing current setting means, 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 A third comparing means for comparing the output of the third suppressing current setting means with the output of the fourth suppressing current setting means, and a fourth comparing means for comparing an output of the current detecting means with an output of the fourth suppressing current setting means. Output of detection means Fifth comparing means for comparing the output of the first return current setting means, and an output of the current detection means and a current value determined by the second return current setting means or the first return current setting means. Sixth comparison means for comparing the output of the first return current setting means for setting the increased value, and nth comparison means for comparing the output of the current detection means with the output of the return current setting means of na And, further, a first current comparing means for comparing the output of the current detecting means for branching and the output of the first current suppressing means, an output of the current detecting means for branching, and a second current suppressing means for setting the second current. 2b comparing means for comparing outputs, 3b comparing the output of the branching current detecting means and the output of the 3b suppressing current setting means.
Comparing means, further comparing the output of the branching current detecting means with the output of the first return current setting means, 4b comparing means, the output of the branching current detecting means, the return current of the 2b Setting means, or 5b comparing means for comparing the output of the 1bb return current setting means for setting a value higher than the current value determined by the 1b return current setting means, and the branching current detecting means. It is provided with 6b comparison means for comparing the output and the output of the nbb return current setting means, the rated current of the overcurrent protection device of the trunk line connected to the house wiring, or
Means for setting an allowable current, and allowable current correction means for varying the allowable current value with reference to the set allowable current value of the overcurrent protection device of the main line, wherein the output of the first to n-th comparing means is provided. And a centralized control device that controls a plurality of air conditioners in accordance with the operation priority set by the operation priority setting means based on the above.

Further, in addition to the above means, the present invention further comprises means for displaying an allowable current set value of the overcurrent protection device.

The present invention further comprises means for displaying a correction value corrected by allowable current correction means for varying the allowable current value based on the allowable current value of the overcurrent protection device.

Further, the present invention is provided with a means for displaying the current flowing through the house wiring for each wiring system or a means for displaying an average value or an added value of at least two wiring systems.

Also, the present invention provides a method of calculating a ratio of a current flowing through a house wiring to an allowable current set value of an overcurrent protection device for each wiring system, or an average value or an added value of at least two wiring system currents. Means for displaying the ratio of the current to the allowable current set value.

The present invention also provides a ratio of the current flowing through the house wiring to a value obtained by further correcting the allowable current for the allowable current setting value of the overcurrent protection device for each wiring system, or an average value of the wiring system current composed of at least two systems, Means are provided for displaying a ratio of the allowable current set value of the overcurrent protection device to a value obtained by further correcting the allowable current. The above-mentioned current display contents are switched by the display switching means and displayed on the current use rate display section. Further, according to the present invention, according to the current capacity of the air conditioner connected to the house wiring, the current capacity of home electric appliances other than the air conditioner, and the use state of each of the devices, the return operation for restarting the operation of the suppressed air conditioner is performed. Means are provided for changing the current value setting.

Further, in the present invention, a current limiter may be installed in addition to the overcurrent protection device for the main line depending on a difference in power supply method of a power company that supplies electricity. Means are provided for classifying the type of overcurrent protection device to be installed (overcurrent protection device or current limiter). In addition, there is provided connection switching means for changing the connection of the current detection means in conjunction with the means for classifying the type of the overcurrent protection device.

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

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

In the figure, reference numeral 22 denotes an air conditioner operating terminal, 27 denotes a central control unit for controlling a plurality of air conditioner operating terminals 22, and 24 denotes an air conditioner.

Reference numeral 1 denotes a central processing unit (hereinafter referred to as cpu ₁ ), and reference numeral 2 denotes a signal transmission / reception unit that couples a plurality of air conditioner operation terminals 22 and a central control unit main body 27. Reference numerals 3 and 4 denote transmission lines for connecting a plurality of air conditioner terminals and the central control device body b. Reference numeral 5 denotes a memory unit including a program memory and a data memory.

8 ^a , 8 ^b , 8 ^c indicate commercial power supplied to the air conditioner,
Each single-phase three-wire trunk is shown. The air conditioner is connected between 8 ^a -8 ^b and between 8 ^b -8 ^c. Reference numeral 12 denotes a CT circuit for detecting the total value of the load current of the equipment connected to each house.Current transformers 12a and 12b of the current detection unit, and a rectifier for rectifying the outputs of the current transformers 12a and 12b.
12c, 12d, 12g, 12h are smoothing capacitors connected to the rectifiers 12c, 12d, 12g, 12h are smoothing capacitors, and 12e, 12f are discharge resistors. 37,3
8, 39, 40 are connection switching means for switching the connection of the current transformer of the current detection means.When a general overcurrent protection device is installed for the main line, the switching means 37, 38, 39 are all provided.
Set to NC side. The switching unit 40 is set in an open state.

When the current limiter is set for the main line, the switching units 37, 38, and 39 are controlled to be set to the NO side and the switching unit 40 is set to the ON state. 13, 8 ^a -8 ^b and between 8 ^b of the air conditioner is connected to a commercial power source described above is the commercial power source
-8 ^c between a wiring system setting means for selecting whether it is connected to one of the system shall be the same number of switches and the number of air conditioners to be at least connected is arranged.

In this embodiment, the current transformer 12a, the load current for current detection of a load connected between the commercial power source 8 ^b -8 ^c, also the current transformer 12b is connected between the commercial power source 8 ^a -8 ^b set by the wiring system setting unit 12 becomes a detection is performed when the commercial power source 8 ^a -8 ^b and between 8 ^b -8 air conditioner to the system between ^c are connected, the wiring system setting unit 12
For example, the state of the switch is read via cpu ₁ . Reference numeral 6 denotes a suppression current setting means for restricting a current flowing through the wiring of the house, and reference numeral 16 denotes a return current setting means for returning the air conditioner in the suppression operation state to the original operation state.

Setting suppression current value and the return current is a DC voltage for example, by the resistance division of resistors 6a~6h and 16a~16c and VR ₁ to VR _3, it produces a voltage equal to the control and the return current.

In this embodiment, the voltage for determining the first suppression current value is changed from the intersection of the resistors 6a and 6b to the voltage for determining the second suppression current value and the intersection between the resistors 6c and 6d is changed to the third suppression current. The voltage for determining the current value is extracted from the intersection of the resistors 6e and 6f, and the voltage for determining the fourth suppression current value is extracted from the intersection of the resistors 6g and 6h. On the other hand, the voltage for determining the first return current value is
16a, the intersection of VR _1, the second return current value or, the first return current value than the first 1a of the return current voltage resistor 16b determining the was increased sequentially from the intersection of the VR _2, further Nath
Taking out a voltage that determines the return current resistor 16c, respectively from the intersection of the VR _3.

The voltage of each level for determining the control current value and the return current value described above is provided for each of the systems L ₁ and L ₂ . Each level is connected to, for example, a negative input terminal of the comparators 10 and 11. The outputs of the respective systems of the current detection means 12 are connected to the + input terminal of the comparator. 19, each air conditioner is stopped by each output of the above-described comparison means 10, or at least the compressor is stopped, or the operating frequency is reduced,
Shows an operation mode display unit for displaying each suppressed operation state of the air conditioner, for example, deceleration of the operation frequency, at least when the compressor is stopped, the display unit corresponding to the air conditioner blinks, during normal operation Turns on the display unit, and turns off the display unit when the air conditioner is stopped. 34 is
Fig. 3 shows a CT circuit for detecting a load current of at least one air conditioner, and includes a current transformer 34a of a current detection unit, a rectifier 34b for rectifying the output of the current transformer, a smoothing capacitor 34d, and a discharging resistor 34c. 33 is a return current setting means for returning the air conditioner in the suppressed operation state to the original operation state.

Setting suppression current value and the return current is a DC voltage for example, by the resistance division of resistors 32a~32f and 33a~33c and VR ₄ to VR _6, produces a voltage equal to the control and the return current.
In this embodiment, the voltage for determining the first suppression current value, the voltage for determining the second suppression current value from the intersection of the resistors 32a and 32b, the intersection of the resistors 32c and 32d, the 3b suppression current. The voltage for determining the current value is extracted from the intersection of the resistors 32e and 32f.

On the other hand, the voltage for determining the return current value in FIG.
From the intersection of VR ₄ , the return current value of 2b
Retrieve the return current from the voltage resistance 33b that determines the return flow value of the 2bb was increased sequentially from the intersection of VR _5, a voltage for determining a demodulation current value of the nbb resistor 33a, respectively from the intersection of the VR ₆ . The voltage at each level that determines the above-described suppression current value and return current value is connected to, for example, the negative input terminal of the comparators 35 and 36 for each level. The outputs of the respective systems of the current detecting means 34 are connected to the + input terminal of the comparator. Numeral 30 indicates voltage division setting means depending on the input voltage difference of the air conditioner, which is provided corresponding to the air conditioner, and sets, for example, 100 V / 200 V.

For example, an air conditioner with a 200 V input is connected between power supply lines 8 ^{b and} 8 _c as shown at 24 in FIG. 1, and the power consumed by the air conditioner is both L ₁ and L ₂ . It flows into the system.

Therefore, like a 100V input air conditioner, the power line
Wiring system setting means for setting either connected to one of L ₁ and L ₂ are not particularly necessary. The 200 V input air conditioner
CT transformer for detecting a current flowing through the power supply line L ₁ and L ₂
The suppression operation described later is performed from both outputs of 12a and 12b.

Reference numeral 20 denotes 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 24 on a one-to-one basis are arranged.

Reference numeral 15 denotes an operation priority setting means for setting an operation priority between the air conditioners connected to the same wiring system, which is set by the wiring system setting means 13 described above.

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

Each output of the comparators 10 and 11 is read via cpu ₁ and the value of the current flowing through the house wiring detected by the CT circuit is larger than the output of the fourth suppression current setting means. For each system in which the plurality of air conditioners are connected to the wiring of the several homes, a simultaneous stop signal is transmitted to each air conditioner operation terminal 22 via the signal transmitting and receiving unit 2, and 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 conditioner that has output the simultaneous stop signal is transmitted via the signal transmission / reception unit 2 to the air conditioner. Then, a signal for returning to the original operation state to each of the air conditioner operation terminals 22 is output in order from the air conditioner having the highest operation priority.

The signal transmitting / receiving unit 2 and the air conditioner operation terminal 22
Are connected via transmission lines 3 and 4 to exchange signals between the signal transmitting / receiving unit 2 on the centralized control device side and the air conditioner operation terminal 22. Hereinafter, the same operation is performed for the first to third suppression currents and the second return current setting means, which will be described in detail below.

Further, when the value of the current flowing through the wiring of the house detected by the CT circuit 12 is larger than the output of the third suppression current setting means, the air having the lower operation priority among the plurality of air conditioners. The current value detected by the CT circuit for each power line system in a fixed cycle order from the
The air conditioner is stopped until the current becomes equal to or less than the 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, the air conditioner having a lower operation priority among the plurality of air conditioners. The operating frequency of the air conditioner equipped with the frequency converter is changed until the current value detected by the CT circuit becomes equal to or less than the first suppression current value for each system of each power supply line in a fixed cycle order from the air conditioner. For deceleration and general-purpose air conditioners, at least stop the compressor.

The above-described return control after the suppression operation is performed by setting a current value detected by the CT circuit for each system of each power supply line to be a first return current that sets a current value for restarting the operation of the air conditioner that has performed the suppression operation. When the output of the setting means is smaller, the current value detected by the CT circuit for each power supply line system in the order of a certain cycle from the air conditioner having a higher operation priority among the plurality of air conditioners is The operation of the air conditioner is restarted by the number of vehicles falling within the current value determined by the first suppression current setting means, but the operation of the air conditioner restarted by the first return current setting means is kept constant. The period is monitored, and only when the current value specified by any of the suppression current setting means 1 to 4 is exceeded again within a certain period, the suppression operation is immediately performed again in a low-priority order in the air conditioner in a certain cycle. Applicable air conditioner The return current value for restarting operation
The value is switched to a value larger than the first return current value and determined by the second return current setting means.

Also, as a second return control method, the operation of the air conditioner restarted by the return current setting means is monitored for a certain period of time, and the current value set by any of the suppression current setting means 1 to 4 is exceeded again within a certain period of time. Each time the switching is performed, the current is switched to a return current value determined by the first to nath plurality of return current setting means sequentially increased from the current value determined by the first return current setting means.

Each output of the comparators 35 and 36 is read via cpu ₁ , and the current value flowing through the house wiring detected by the CT circuit 34 is larger than the output of the 3b suppression current setting means. A signal for stopping the air conditioner is transmitted to each air conditioner operation terminal 22 via the signal transmitting and receiving unit 2, and the current value flowing through the wiring of the house detected by the CT circuit is When the output is smaller than the output of the return current setting means of the 1b, the air conditioner that has output the simultaneous stop signal is returned to the original operation state to each air conditioner operation terminal 22 via the signal transmission / reception unit 2. The signal to be output is output.

The signal transmitting / receiving unit 2 and the air conditioner operation terminal 22
Is transmitted and received between the signal transmission / reception unit 2 on the centralized control device side and the air conditioner operation terminal 22 via the transmission lines 3 and 4. Hereinafter, the same operation is performed for the first and second suppression currents and the second return current setting means, which will be described in detail below.

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 current suppressing means, at least the compressor of the air conditioner is stopped.

Further, when the value of the current flowing through the house wiring detected by the CT circuit is larger than the output of the 1b suppression current setting unit, the operating frequency of the frequency converter-equipped air conditioner is reduced, and For the conditioner, at least stop the compressor.

In the return control after the suppression operation, the current value detected by the CT circuit for each power supply line system sets a current value for restarting the operation of the air conditioner that has performed the suppression operation.
When the output of the return current setting means of 1b is smaller, the operation of the air conditioner is restarted.However, the operation of the air conditioner restarted by the return current setting means of the 1b is monitored for a certain period, and within a certain period. Only when the current value specified by any of the suppression current setting means 1b to 3b again is exceeded, the return current value for immediately performing the suppression operation again and restarting the operation of the corresponding air conditioner is the first current value. Is switched to a value larger than the return current value set by the second return current setting means.

In addition, as a second return control method, the operation of the air conditioner restarted by the return current setting means is monitored for a certain period of time, and the current value determined by any of the suppression current setting means 1b to 3b is again exceeded within a certain time period. Each time, the current is switched to a return current value determined by a plurality of first to n-th return current setting means sequentially increased from a current value determined by the first return current setting means.

13 is a wiring system setting means for setting a connection state to a power supply line for each of a plurality of air conditioners. For example, a single-phase three-wire system is used. Then, the other two power supply lines constitute two power supply lines, and it is set to which of the power supply lines (L ₁ / l ₂ ) each air conditioner is connected.

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

The 200 V input air conditioner does not need to be set by the wiring system setting means 13 as described above. Therefore, the air conditioner is detected by the CT circuit 12, and furthermore, the operation priority determined by the operation priority setting means 15 set between the air conditioners based on each output of the comparing means 10 described above. According to the order, the above-described suppression and return operations are performed. Operation priority setting means, as above described, since L _1, L ₂ of the respective systems are respectively provided, but the operation priority two systems of L _1, L ₂ is to be set, L It will follow the set value of any of the strains of ₁ and L _2.

Numeral 14 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 control of the suppression operation and the return operation of the air conditioner is performed as described above.

19, the operating state of each air conditioner that is suppressed operation by the current value flowing through the house wiring, shows a display unit that displays on each of the air conditioner operation terminal, for example, and deceleration of the operating frequency, The display unit corresponding to the air conditioner blinks at least when the compressor is stopped, the display unit is turned on during normal operation, or the display unit is turned off when the air conditioner is stopped.

Reference numeral 17 denotes a means for setting the rated current or the allowable current of the overcurrent protection device as described above. For example, when the value is X (A), the first to fourth suppression current setting means are used. The value to be set sets the ratio of X (A) described above.

21 is a correction voltage generator for correcting the permissible current based on the permissible current value set by the permissible current setting means of the overcurrent protection device. Applied to the means.

Reference numeral 26 denotes an allowable current setting value display means, for example, 0 based on the value set by the allowable current setting means 17 of the overcurrent protection device.
Display means for displaying a range of 100% or an average value of at least two wiring systems flowing through the house wiring,
This is a means for displaying a ratio of the allowable current set value of the overcurrent protection device to a value obtained by further correcting the allowable current.

Numeral 28 denotes means for displaying currents (L ₁ and L ₂ ) flowing through the house wiring for each wiring system, and at least a measured current for each wiring system or an average value of the wiring system current composed of the at least two systems. Means for displaying the value, or means for displaying the current flowing in the house wiring as a ratio (usage rate) to the allowable current setting value of the overcurrent protection device for each wiring system, or the average value of the current consisting of at least two systems described above. Or means for displaying the added value as a ratio [usage rate] with respect to the allowable current of the overcurrent protection device, or the current flowing through the house wiring is further subjected to the allowable current correction to the allowable current set value of the overcurrent protection device. Means for displaying as a ratio [use rate] to the value is shown. Reference numeral 41 denotes a current display content switching unit. The above-described display content is switched by the display switching unit 41 and displayed on the current usage rate display unit.

Advantageous Effects of the Invention The centralized control method of the air conditioner of the present invention is a method for controlling the current value flowing through the overcurrent protection device and the current limiter when a plurality of air conditioners and appliances other than the air conditioner are used. It exceeded the allowable value, it turned off, worsened the feeling when using the air conditioner, and also stopped inconvenience in use such as stopping electric appliances other than the air conditioner. Describe the effect.

1) When an overcurrent flows through the overcurrent protection device, the overcurrent protection device and the current limiter are not turned off, so that the air conditioner is not simply stopped but suppressed operation according to the level of the overcurrent. Therefore, the number of unnecessary stop operations of the air conditioner is reduced, and the feeling of the air conditioner can be prevented from lowering.

2) When an overcurrent flows through the overcurrent protection device and the current limiter, the unnecessary operation of appliances other than the air conditioner can be prevented by performing the suppression operation of the air conditioner.

3) By setting the model classification of whether or not the operation frequency converter is installed, when overcurrent flows in the overcurrent protection grassland, there is an effect that the air conditioner of a different model can be easily suppressed and operated. .

4) Since the return current value can be set according to the current capacity of the air conditioner used in the home and the capacity of equipment other than the air conditioner, for example, the return operation current value of the air conditioner that has been once suppressed and operated is at home. Can be set freely according to circumstances.

5) The suppression current value can be freely varied within the allowable current range of the overcurrent protection device, and the current usage rate and the allowable current value can be displayed. Therefore, the effect is large especially when energy saving operation is performed.

6) In addition to the general overcurrent protection device, the same control can be performed at the place where the current limiter is installed, and the same effect as above can be obtained.

[Brief description of the drawings]

The drawing is a block diagram in one embodiment of the present invention. 1 ... cpu, 2 ... signal transmission / reception unit, 3-4 ... transmission line, 5 ... memory unit, 6 ... suppression current setting means, 7 ...
Overcurrent protection device, 8 ^a , 8 ^b , 8 ^c … commercial power line, 9… commercial power input terminal, 10… suppression current comparison circuit, 11… return current comparison circuit, 12… CT circuit, 13 ... Wiring system setting means,
14 …… Model classification setting means, 15 …… Operation priority setting means,
16: return current setting means, 17: allowable current setting means of the overcurrent protection device, 18: allowable current correction means, 19: operation mode display section, 20: room temperature setting means, 21: correction voltage generation Unit, 22: Terminal device for air conditioner operation, 23: Terminal display unit for air conditioner operation, 24: Air conditioner, 25: Remote controller for air conditioner operation, 26: Allowable current setting value Display means,
27 Central control unit, 28 Current usage display, 29
Individual ON / OFF SW, 30: Voltage division setting means, 31: Overcurrent protection device for branching, 37 to 40: Connection switching unit, 41: Display switching means, 41: Connection switching unit drive unit.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Morihiro Nakayama 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-2-89962 (JP, A)

Claims (12)

(57) [Claims] 1. A first suppression current setting means having at least one system of current detection means for detecting a total value of a load current flowing in a house wiring, and setting a current value for lowering an operation frequency of an air conditioner. A second suppression current setting means for setting at least a current value for stopping the compressor, a third suppression current setting means for setting a current value for stopping operation of the air conditioner, and a plurality of air conditioners. Fourth suppression current setting means for setting a current value for stopping the operation and first return current setting means for setting a current value for restarting the operation of the air conditioner suppressed by the first suppression current setting means. The operation of the air conditioner restarted by the first return current setting means is monitored for a certain period of time, and the current value set by one of the first to fourth suppression current setting means is again exceeded within a certain time period. And driving Second return current setting means for setting a current value for restarting operation of the corresponding air conditioner, wiring system setting means for setting which power line each air conditioner is connected to, and wiring system setting Operation priority order setting means for setting an operation priority order among a plurality of air conditioners connected to the same system power line set by the means,
The voltage class setting means for setting the voltage type of the commercial power supply to the air conditioner for each air conditioner, at least the output of the current detection means, and the first to fourth suppression current setting means are individually compared. First to fourth comparing means, and at least outputs of the current detecting means and fifth and sixth comparing means for individually comparing the first and second return current setting means for each power supply line of the same system. Means for setting the rated current or the permissible current of the overcurrent protection device connected to the house wiring; and permissible current correction means for varying the permissible current value based on the set permissible current of the overcurrent protection device. A centralized control device that controls a plurality of air conditioners in accordance with the operation priority set by the operation priority setting means based on the outputs of the first to n-th comparison means. Centralized system Apparatus. 2. A current detecting means for detecting a load current flowing through at least a branch overcurrent protection device to which an air conditioner is connected, and a fifth control for setting a current value for lowering an operation frequency of the air conditioner. A current setting means, a sixth control current setting means for setting at least a current value for stopping the compressor, a seventh control current setting means for setting a current value for stopping the operation of the air conditioner, Third return current setting means for setting a current value for restarting the operation of the air conditioner suppressed by the seventh to seventh suppression current setting means;
The operation of the air conditioner restarted by the return current setting means is monitored for a certain period of time, and the current exceeds the current value determined by any of the fifth to seventh suppression current setting means within the certain period of time. The centralized control device for an air conditioner according to claim 1, further comprising a fourth return current setting means for setting a current value for restarting the operation of the air conditioner. 3. The operation of the air conditioner restarted by the first return current setting means is monitored for a certain period of time, and the first return current is set again within a certain period of time.
Each time the current value determined by any of the first to fourth suppression current setting means is exceeded, the current value is sequentially increased from the current value determined by the first return current setting means, that is, from the rated current value of the overcurrent protection device to the minus side. The centralized control device for an air conditioner according to claim 1, further comprising a plurality of return current setting means. 4. The operation of the air conditioner restarted by the first return current setting means is monitored for a certain period of time, and the first return current setting means restarts the operation of the first air conditioner within a certain period of time.
Every time the current value exceeds the current value determined by any one of the fourth suppression current setting means, the current value is sequentially increased from the current value determined by the first return current setting means, that is, from the rated current value of the overcurrent protection device to the minus side. The centralized control device for an air conditioner according to claim 2, wherein a plurality of return current setting means are provided. 5. The operation of the air conditioner restarted by the third return current setting means is monitored for a certain period of time, and the operation of the fifth air conditioner is resumed within a certain period of time.
Every time the current value exceeds the current value determined by any one of the seventh to seventh suppression current setting means, the current value is increased to the minus side from the current value determined by the third return current setting means, that is, from the rated current value of the overcurrent protection device. The centralized control device for an air conditioner according to claim 2, wherein a plurality of return current setting means are provided. 6. The operation of the air conditioner restarted by the third return current setting means is monitored for a certain period of time, and within a certain period of time, the operation of the fifth air conditioner is resumed.
Every time the current value determined by any one of the first to seventh suppression current setting means is exceeded, the current value is sequentially increased from the current value determined by the third return current setting means, that is, from the rated current value of the overcurrent protection device to the minus side. The centralized control means for an air conditioner according to claim 4, further comprising a plurality of return current setting means. 7. The centralized control device for an air conditioner according to claim 1, further comprising means for displaying at least two currents flowing through the house wiring as a vector-combined value. 8. The centralized control of an air conditioner according to claim 1, further comprising means for displaying a current flowing through the house wiring for each wiring system or means for displaying an average value of at least two wiring systems. apparatus. 9. A method according to claim 1, wherein a current flowing through the house wiring is defined as a ratio to an allowable current (or rated current) set value of the overcurrent protection device for each wiring system, or an average value of at least two wiring system currents is determined. The centralized control device for an air conditioner according to claim 1, further comprising means for displaying the ratio as a ratio to a set value of an allowable current (or a rated current value) of the protection device. 10. A ratio of a current flowing through a house wiring to a value obtained by further correcting an allowable current (or rated current) set value of an overcurrent protection device for each wiring system by an allowable current.
Or means for displaying an average value of a current of at least two wiring systems as a ratio to a value obtained by further correcting an allowable current (or a rated current) of the overcurrent protection device with an allowable current. (1) A centralized control device for an air conditioner according to (1). 11. The current capacity of an air conditioner connected to a house wiring, the current capacity of a household electrical appliance other than an air conditioner, and
The centralized control of an air conditioner according to claim 1, further comprising means for varying a return current value setting for restarting the operation of the suppressed air conditioner according to a use state of each of the devices (including the air conditioner). apparatus. 12. According to the current capacity of the air conditioner connected to the house wiring, the current capacity of home electric appliances other than the air conditioner, and the use state of each of the devices (including the air conditioner),
The centralized control device for an air conditioner according to claim 2, further comprising means for changing a setting of a return current value for restarting the operation of the air conditioner in the suppressed operation.