JPH0794907B2 - Air conditioner control device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a control device for a plurality of air conditioners and a 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 new media era of controlling a plurality of controlled devices with a single centralized control device is approaching. Then, the waves are rushing into the home, and the situation where the centralized control device is used also in the air conditioner is increasing.

In addition, it is necessary to strengthen the power supply equipment to cope with the peak load of the air conditioner and the load other than the air conditioner, which increases with the load in each home. Especially in summer, the amount of power used increases and regional blackouts may occur.

Problems to be Solved by the Invention When electric appliances of equipment other than the air conditioner main body are fully used in each home, when the compressor is started under air-conditioning conditions with severe load, and capacity conversion device When operating an air conditioner equipped with a power supply with maximum capacity, there was a concern that a large current would flow and exceed the capacity of the power supply facility, resulting in a power outage accident.

The present invention is to solve the above-mentioned conventional problems, and prevents excessive current due to the operation of the air conditioner and the operation of electrical appliances other than the air conditioner, regardless of the magnitude of the current value of the devices other than the air conditioner. It is intended for the purpose.

Means for Solving the Problem In order to achieve this object, the present invention provides a means for generating a current regulating signal that regulates a total current value flowing through a wiring of a house, a receiving means for receiving the current regulating signal, and A means for receiving a current regulation signal, a current detecting means for at least one system for detecting a total load current value flowing in wiring of a house, and a current value for starting an operation for narrowing the capacity of an air conditioner Current setting means, second current setting means for setting a current value that is slightly larger than the current value set by the first current setting means, and that stops the operation of some of the air conditioners, and the second current setting means. Third current setting means for setting a current value that is slightly larger than the current value set by the current setting means for stopping the operation of all air conditioners, and the current value set by the first current setting means. Than A slightly smaller fourth current setting means for setting the current value of the air conditioner for each system to return from the restrained operation or the stopped state to the original operating state, and the first to fourth current setting by the signal of the receiving means. A first control device that determines a current setting value of the means, a wiring system setting means that sets which wiring system the air conditioner is connected to, and an operation priority of a plurality of air conditioners. Priority setting means, first comparing means for comparing the output of the current setting means with the output of the first current setting means, and comparison of the output of the current setting means with the output of the second current setting means. Second comparing means, third comparing means for comparing the output of the current setting means with the output of the third current setting means, output of the current verifying means and output of the fourth current setting means. Fourth to compare
Comparing means, a second control device for centrally controlling a plurality of air conditioners, and a transmission line connecting the air conditioner operating terminal and the second control device. The capacity of the air conditioner is suppressed, the operation is stopped, and the operation is restored based on the setting of the means.

Effect The present invention, by this configuration, regardless of the magnitude of the current value of the air conditioner and electrical appliances other than the air conditioner, always monitors the use state of power, issues a load control command to the air conditioner, and uses The air conditioner can be controlled according to the power excess prediction degree, and power can be supplied to each home within the range of power facility capacity.

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 control method for an air conditioner according to an embodiment of the present invention.

In the figure, 1a, 1b, 1c, 1d are air conditioner operating terminals, 2 is a second control device for controlling a plurality of air conditioner operating terminals 1a-1d, 3a, 3b, 3c 3d indicates an air conditioner.
Reference numeral 4 is a central processing unit (hereinafter referred to as CPU). Reference numeral 5 is a transmission line that connects the plurality of air conditioner terminals 1a to 1d and the second control device 2. Reference numeral 21 is an overcurrent protection device, and 6a, 6b, 6c are main lines of single-phase three-wire type that represent commercial power supplies supplied to the air conditioners 3a to 3d. The air conditioners 3a to 3d are connected between the trunk lines 6a and 6b and between the trunk lines 6b and 6c, respectively. 7a and 7b are CT circuits that detect the total value of the load current of equipment connected to each house,
8a and 8b are rectification circuits for rectifying the outputs of the CT circuits 7a and 7b, 9
Reference numerals a and 9b are smoothing capacitors connected to the rectifier circuits 8a and 8b.

Reference numeral 10 denotes a wiring system selection switch section for selecting which system the air conditioner connected to the commercial power source is connected to, the trunk lines 6a, 6b of the commercial power source or the trunk lines 6b, 6c.

In the case of the present embodiment, the CT circuit 7a is the main line 6a, 6 of the commercial power source.
For the current detection of the load connected between b, and the CT circuit 7b is for the current detection of the load connected between the commercial power supplies 6b and 6c.
The setting of the selection switch 10 is performed when the air conditioners 3a to 3d are connected to the system between the main lines 6a, 6b of the commercial power source or the main lines 6b, 6c, and the state of the selection switch is via the CPU 4. Read. Reference numeral 19 is a current regulation value generation unit that generates a signal that regulates the total current value flowing in the trunk lines 6a, 6b, 6c, 20 is a signal reception unit of the current regulation value generation unit 19, and 21 is based on the signal of the reception unit 20. , First to fourth current value setting means described later
It is a first control device for controlling the current setting values of 11, 12, 13, and 14. Reference numeral 11 denotes a first current setting means for setting a current value for starting an operation of reducing the capacity of the air conditioners 3a to 3d in order to suppress the current flowing through the wiring of the house. 12 is a part of the air conditioner to suppress the current flowing through the wiring of the house.
It is the 2nd electric current setting means which sets the electric current value which stops operation | movement of 3a-3d. 13 is a third current setting means for setting a current value for stopping the operation of all the air conditioners 3a to 3d in order to suppress the current flowing through the wiring of the house. Reference numeral 14 denotes a fourth current setting means for setting a current value for returning the air conditioners 3a to 3d to the original operating state from the suppression operation or stop state for each system. Reference numerals 15a, 15b, 15c, and 15d are comparators, and the current value flowing through the main line 6a of the commercial power source and the first current setting means 11, the second current setting means 12, and the third current setting means 1
The current values set by the third and fourth current setting means 14 are compared and input to the CPU 4. Similarly, 16a, 16b, 16c and 16d are comparators, which are first current setting means 11, second current setting means 12, third current setting means 13 and third The current values set by the current setting means 14 of No. 4 are compared and input to the CPU 4. 17 is the wiring system selection switch 10
The operation priority setting unit that determines the operation priority among the air conditioners connected to the same wiring system set in 1. is composed of, for example, a 4-bit code switch. 18
a, 18b, 18c, 18d are general electric appliances other than the air conditioner.

Next, the detailed control contents will be explained using Fig. 2. The CT circuits 7a and 7b constantly monitor the current flowing through the commercial power supply line, and the air conditioners 3a to 3d and general electric appliances 18a to 18d.
The following controls are performed according to the operating conditions.

When the current value flowing through the commercial power supply line is less than the current value (100%) determined by the first current setting circuit constant circuit 11 (A
In each zone, each air conditioner can be operated freely.

The value of the current flowing through the commercial power supply line is the first current setting circuit.
Current value (100%) determined by 11 and the second current setting circuit 1
When the current value is between the current value (100%) determined by 2 (B zone), the capacity is sequentially reduced compared to the air conditioner with lower priority, and the current increase is suppressed. Current flowing through the commercial power line If the current value is between the current value (110%) determined by the second current setting circuit 12 and the current value (150%) determined by the third current determination circuit 13 (C zone), priority is given. The air conditioner is set to a lower value, and the air conditioners are sequentially stopped to suppress the increase in current.

The value of the current flowing through the commercial power line is the third current setting circuit.
When the current value (150%) determined by 13 is exceeded (D zone), all air conditioners are stopped and the overcurrent protection device is activated.
Prevents 20 from turning off. When the current value flowing through the commercial power supply line in the B, C, and D zones becomes less than the current value (80%) determined by the fourth current setting circuit 14 (E zone), the priority order is set. The air conditioner set to a higher value is returned to normal operation in sequence. The set values of the first to fourth current setting circuits 11 to 14 are determined by the specified current value generator 19 in consideration of the power supply facility capacity.

EFFECTS OF THE INVENTION As is apparent from the above-described embodiment, the present invention provides the current setting values at four levels, and based on the setting of the priority setting means for setting the operation priority, the air conditioner capacity suppression, operation stop, and operation return. As a result, the customer can arbitrarily set the priority order of the air conditioners to be controlled according to each life scene. As a first step, the power can be suppressed by individual capacity control, and if necessary, an individual can be set as a second step. Power is suppressed by stopping the operation, and if necessary, all air conditioners are stopped as the third step. Therefore, it is possible to operate within the breaker capacity without impairing comfort, and the total current decreases. As a result, the priority can be maintained even when the system is stopped or restored from the capacity-restricted state, so comfort can be ensured, and there is an increase in current due to the operation of the air conditioner or general electric appliances. However, since the total current flowing through each home can be controlled to a certain value or less, it has the effect of preventing accidents such as regional power outages.

[Brief description of drawings]

FIG. 1 is a block connection diagram according to an embodiment of the present invention, and FIG.
FIGS. 9A and 9B are a time-current characteristic diagram and an operation explanatory diagram, respectively, for explaining the control contents according to the embodiment. 1a, 1b, 1c, 1d …… Air conditioner operation terminal, 2 …… Second
Control device, 3a, 3b, 3c, 3d ... Air conditioner, 5 ... Transmission line, 7a, 7b ... CT circuit, 10 ... Wiring system selection switch, 11 ... First current setting circuit, 12 ...... Second current setting circuit, 13 ...... Third current setting circuit, 14 ...... Fourth current setting circuit, 15a, 15b, 15c, 15d, 16a, 16b, 16c, 16d …… Comparator, 17 ...... Activity priority setting section, 19 ...... Current regulation value generation section, 20 ...... Reception section, 21 ...... First control section.

Claims (1)

[Claims] 1. A means for generating a current regulation signal for regulating a total current value flowing through a wiring of a house, a receiving means for receiving the current regulation signal, and a total load current value flowing through a wiring of the house. A current detecting means, a first current setting means for setting a current value for starting an operation for narrowing the capacity of the air conditioner, and a part of the air which is slightly larger than the current value set by the first current setting means. Second current setting means for setting a current value for stopping the operation of the air conditioner, and a current value slightly larger than the current value set by the second current setting means for stopping the operation of all the air conditioners. A third current setting means to be set, and a current value which is slightly smaller than the current value set by the first current setting means and which causes the air conditioner to return from the control operation or stop state to the original operation state for each system. Configuration A fourth current setting means, a first control device that determines a current setting value of the first to fourth current setting means based on a signal of the receiving means, and wiring in which the air conditioner is connected, Wiring system setting means for setting which wiring system is connected, priority setting means for setting operation priority of a plurality of air conditioners, output of the current detecting means and the first current setting means. First comparing means for comparing the outputs of the current detecting means, second comparing means for comparing the output of the current detecting means and the output of the second current establishing means, the output of the current detecting means and the third current A third comparing means for comparing the outputs of the setting means, a fourth comparing means for comparing the output of the current detecting means and the output of the fourth current setting means, and a plurality of air conditioners are collectively controlled. Second control device, and the air conditioner operating terminal And the second comprising a transmission line connecting the control device, the priority setting setting-capacity of the air conditioner based on the unit, shut down,
An air conditioner control device configured to restore operation.