JPH0754194B2 - 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 control systems using microcomputers, the trend toward the new media era of controlling one centralized control device and a plurality of controlled devices is increasing. Then, this tendency has appeared in the home, and the motivation to use the centralized control device has increased in the field of air conditioners.

On the other hand, on the power supply side in the home, it is necessary to increase the supply equipment to cope with the load peak due to the increase in the load on the air conditioner and other than the air conditioner. Due to the difference in load use characteristics, there are situations in which the benefit of the Confederates is hindered, such as the operation of an overcurrent protection device.

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, when the compressor is started under air-conditioning under a severe load, or when a capacity conversion device is used. When the air conditioner equipped with is operated at maximum capacity, the current value flowing through the overcurrent protection device exceeds its allowable value, and it turns off, making the air conditioner uncomfortable and inconvenient to use. Was waking up.

The present invention is to solve the above conventional problems, regardless of the magnitude of the current value of equipment other than the air conditioner, the operation of the air conditioner and the turning off of the current protection device by the operation of electrical appliances other than the air conditioner. The purpose is to eliminate the operation, at the same time, the total load current flowing in the wiring of the house,
By displaying the ratio with the set current set for controlling the operation of the air conditioner in order to suppress the current, the total load current value during arbitrary operation can be easily confirmed.

Means for Solving the Problem In order to achieve this object, the present invention regulates at least one system of current detection means for detecting a total load current value flowing in wiring of a house, and current flowing through the wiring of the house. First current setting means for setting a current value that is a rated current of the overcurrent protection device and that starts an operation of reducing the capacity of the air conditioner to suppress the current flowing through the wiring of the house, and the first current setting means. Second setting a current value that is slightly larger than the current value set by the current setting means and that stops the operation of some air conditioners in order to suppress the current flowing through the wiring of the house
And a current value that is a little larger than the current value set by the second current setting means and that stops the operation of all air conditioners in order to control the current flowing in the wiring of the house. 3 which is slightly smaller than the current value set by the current setting means and the first current setting means,
Fourth current setting means for setting a current value for returning the air conditioner for each system from a suppressed operation state or a stopped state to an original operating state, and a priority setting means for setting operation priorities of a plurality of air conditioners. The output of the current detection means and the first
The first comparing means for comparing the outputs of the current setting means, the second comparing means for comparing the output of the current detecting means with the output of the second current setting means, and the output of the current detecting means for Third comparing means for comparing the outputs of the third current setting means, fourth comparing means for comparing the output of the current detecting means and the output of the fourth current setting means, and wiring of the house during arbitrary operation As one means for confirming the total load current value flowing in the, the current display means for displaying the ratio of the output of the current detection means and the output of the first current setting means, and a plurality of air conditioners are concentrated. The central control device for controlling the air conditioner, the terminal for operating the air conditioner, and the transmission line connected to the central control device.

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 suppressed according to the power excess prediction degree, and the OFF operation of the overcurrent protection device can be eliminated.

At the same time, the ratio of the total load current flowing in the wiring of the house and the set current set to control the operation of the air conditioner to suppress the current is displayed in a ratio to facilitate the total load current value during arbitrary operation. It is something that can be confirmed.

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 and 1d are air conditioner operating terminals, 2 is a centralized control device for controlling a plurality of air conditioner operating terminals 1a to 1d, 3a, 3b, 3c and 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 centralized control device 2. Reference numerals 6a, 6b, and 6c denote commercial power supplies supplied to the air conditioners 3a to 3d, and each of the single-phase three-wire main lines. The air conditioners 3a to 3d are connected between 6a and 6b and between 6b and 6c, respectively. 7a and 7b are CT circuits that detect the total value of the load current of the equipment connected to each house, 8a and 8b are the CT circuits 7a,
Rectifier circuit for rectifying the output of 7b, 9a, 9b are the rectifier circuit 8
A smoothing capacitor connected to a and 8b. 10 is an air conditioner connected to the above commercial power source of the commercial power source.
It is a wiring system selection switch section for selecting which system is connected between 6a and 6b or between 6b and 6c.

In the case of this embodiment, the CT circuit 7a is for detecting the current of a load connected between the commercial power supplies 6a and 6b, and the CT circuit 7b is a commercial power supply.
It is for detecting the current of the load connected between 6b and 6c, and the setting of the selection switch 10 is between the commercial power sources 6a and 6b or 6b and 6c.
This is performed when the air conditioner is connected to the system between them, and the state of the selection switch is read via the CPU 4. 11 is the rated current of the overcurrent protection device 20 that regulates the current flowing through the wiring of the house, and sets the current value that starts the operation of narrowing the capacity of the air conditioner to suppress the current flowing through the wiring of the house. 1 is a current setting means. 12 is a second current setting means for setting a current value for stopping the operation of some of the air conditioners in order to suppress the current flowing through the wiring of the house. Reference numeral 13 is a third current setting means for setting a current value for stopping the operation of all the air conditioners in order to suppress the current flowing through the wiring of the house. Reference numeral 14 is a fourth current setting means for setting a current value for returning the air conditioner for each system from a suppressed operation state or a stopped state to the original operating state. 15a, 1
Reference numerals 5b, 15c and 15d are comparators, and the current value flowing through the commercial power supply line 6a, the first current setting means 11 and the second current setting means
12, the current values set by the third current setting means 13 and the fourth current setting means 14 are compared and input to the CPU 4. As well as 16
Reference numerals a, 16b, 16c and 16d are current values flowing through the commercial power supply line 6c and the first current setting means 11, the second current setting means 12, the third current setting means 13 and the fourth current. Setting means 14
Compare the current value set in and input to CPU4. 17 is
An operation priority setting unit that determines the operation priority between the air conditioners connected to the same wiring system set by the wiring system selection switch 10 is composed of, for example, a 4-bit code switch. . 18a, 18b, 18c, 18d are general electric appliances other than the air conditioner. Reference numerals 21a and 21b denote the ratio of the output of the current detecting means and the output of the first current setting means 11 of the current flowing through the commercial power supply lines 6a and 6b to the first current setting means.
Arithmetic circuit that calculates based on 11; 22a and 22b are arithmetic circuits
21a and 21b are A / D converters that convert the output analog signals into digital signals, and 23a and 23b are A / D converters 22a and 22b.
Reference numeral 24 is a display panel having display portions 23a and 23b in which a light emitting diode which operates according to the signal converted by is incorporated.

Next, the details of the control will be described with reference to FIG. 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 18
The following controls are performed according to the operating conditions of a to 18d.

When the current value flowing through the commercial power supply line is equal to or lower than the current value (100%) determined by the first current setting circuit (A zone), each air conditioner is freely operated. If the current value flowing through the commercial power supply line is between the current value (100%) determined by the first current setting circuit and the current value (110%) determined by the second current setting circuit (B zone), The capacity is sequentially reduced from the air conditioner set to have a low priority, and the increase in current is suppressed. The current value flowing through the commercial power supply line is the current value (110%) determined by the second current setting circuit and the third value.
If the current value is within the current value (150%) determined by the current setting circuit (C zone), the air conditioners with lower priority are sequentially stopped to suppress the current increase.

When the current value flowing through the commercial power line exceeds the current value (150%) determined by the third current setting circuit (D zone)
Then, shut down all air conditioners and set the overcurrent protection device 20 to OF
Prevent F. When the current value flowing through the commercial power supply line becomes less than the current value (80%) determined by the fourth current setting circuit by the above control in the B, C, and D zones (E
Zones) are returned to normal operation one by one from the air conditioners with higher priority. The current value determined by the first to fourth current setting circuits is determined in consideration of the operating characteristics of the overcurrent protection device 20, the air conditioners 3a to 3d, and the current capacities of the general electric appliances 18a to 18d.

Next, another embodiment will be described with reference to FIG. FIG. 3 is the same as that of FIG.
The functions of a and 21b are different, and the other configurations are the same. The arithmetic circuits 21a and 21b input the current value flowing through the commercial power supply line and the current value determined by the first current setting circuit, calculate the ratio of these two current values according to the selection of the changeover switch 25, and output the calculated value. It outputs a current value determined by the first current setting circuit.

EFFECTS OF THE INVENTION As is clear from the above embodiments, the present invention controls the current of the air conditioner according to the state while detecting the load current flowing in the house. Even if there is an increase in current due to operation, it has the effect of preventing OFF of the overcurrent protection device and operating within the range of the capacity determined by the overcurrent protection device without hindering the benefit of the beneficiary. It is possible to easily confirm the status of the load current and the set current during arbitrary operation by displaying the ratio of the load current value flowing in the house and the set current value for controlling the air conditioner or the display of the set current value.

[Brief description of drawings]

FIG. 1 is a block connection diagram of the present invention, FIG. 2 is a control content explanatory view of the present invention, and FIG. 3 is a block connection diagram of another embodiment of the present invention. 1a, 1b, 1c, 1d …… Air conditioner operating terminal, 2 …… Centralized control device, 3a, 3b, 3c, 3d …… Air conditioner, 5 …… Transmission line, 7a, 7b …… CT circuit , 10 …… Wiring system selection switch, 1
1 ... 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, 1
7 …… Activity priority setting section, 20 …… Overcurrent protection device, 21a, 2
1b, ... Arithmetic circuit, 22a, 22b ... A / D converter, 23a, 23b ...
Display, 24 ... Display panel.

Front page continuation (72) Inventor Isamu Okuda 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP 61-211657 (JP, A) JP 59-201393 (JP, A) JP-A-58-18046 (JP, A)

Claims (2)

[Claims] 1. A current detection means for at least one system for detecting a total load current value flowing through wiring of a house, and a rated current of an overcurrent protection device for controlling a current flowing through the wiring of the house, and the house. First current setting means for setting a current value for starting an operation of narrowing the capacity of the air conditioner in order to suppress the current flowing in the wiring, and a little 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 a part of the air conditioners in order to suppress the current flowing through the wiring of the house, and a value less than the current value set by the second current setting means Third, a large current value is set to stop the operation of all air conditioners in order to suppress the current flowing through the wiring of the house.
And a current value which is a little smaller than the current value set by the first current setting means and which causes the air conditioner to return to the original operating state from the suppression operation or stop state for each system. Current setting means, priority setting means for setting the operation priority of a plurality of air conditioners, first comparing means for comparing the output of the current detecting means and the output of the first current setting means, Second comparing means for comparing the output of the current detecting means with the output of the second current setting means, and third comparing means for comparing the output of the current detecting means with the output of the third current setting means. And a fourth comparing means for comparing the output of the current detecting means and the output of the fourth current setting means, and a ratio of the output of the current detecting means and the output of the first current setting means. Current display means and multiple air conditioning The centrally controlled centralized control device and a control device for an air conditioner having a transmission line connecting the operation terminal unit of the air conditioner and the centralized control unit. 2. At least one system of current detection means for detecting a total load current value flowing in the wiring of the house, and a rated current of an overcurrent protection device for regulating the current flowing in the wiring of the house, and the house First current setting means for setting a current value for starting an operation of narrowing the capacity of the air conditioner in order to suppress the current flowing in the wiring, and a little 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 a part of the air conditioners in order to suppress the current flowing through the wiring of the house, and a value less than the current value set by the second current setting means Third, a large current value is set to stop the operation of all air conditioners in order to suppress the current flowing through the wiring of the house.
And a current value which is a little smaller than the current value set by the first current setting means and which causes the air conditioner to return to the original operating state from the suppression operation or stop state for each system. Current setting means, priority setting means for setting the operation priority of a plurality of air conditioners, first comparing means for comparing the output of the current detecting means and the output of the first current setting means, Second comparing means for comparing the output of the current detecting means with the output of the second current setting means, and third comparing means for comparing the output of the current detecting means with the output of the third current setting means. Inputting the output of the current detecting means and the output of the fourth current setting means, and the output of the current detecting means and the output of the first current setting means, Ratio of two outputs or said first A current display means for displaying either one of the outputs of the flow setting means is selected by the changeover switch,
A central control device for centrally controlling a plurality of air conditioners,
An air conditioner control device comprising a transmission line connecting an operation terminal of the air conditioner and the centralized control device.