JP2682538B2 - Control device for air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner control device, and more particularly to control of an outdoor blower of a separation type air conditioner.

[0002]

2. Description of the Related Art In a separation type air conditioner, one outdoor unit and one indoor unit (hereinafter referred to as a single type configuration),
One outdoor unit has a plurality of indoor unit configurations (hereinafter referred to as a multi-type configuration), and one of the configurations is adopted according to the purpose. In the case of the multi-type configuration, the outdoor units are provided with compressors corresponding to the number of indoor units, and a refrigerant circuit is formed by one compressor for each indoor unit. As shown in FIG. 3, the outdoor blower control circuit is shown. In addition, one outdoor blower is commonly used, and it is necessary to control the operation of the outdoor blower from each indoor unit, and the drive circuit of the outdoor blower forms an OR circuit with each indoor unit. Indoor units often have the same function and structure in both single-type and multi-type configurations. However, as the control method of the outdoor blower is different (especially during defrosting), it should be a common model. I couldn't. In the case of the single type configuration, it is connected integrally with the outdoor unit, so the outdoor blower is stopped during defrosting, and at the same time, the indoor pipe temperature is detected to stop the operation of the indoor blower and control it to maintain the indoor temperature. However, in the case of a multi-type configuration, when one indoor unit enters defrost, the information is transmitted to the other indoor unit, and other indoor units continue to operate the outdoor blower and It is necessary to ensure the operation, and for this reason, in addition to the power supply line for driving the outdoor unit from each indoor unit, it is necessary to add a dedicated signal line for transmitting information to other indoor units.
For this reason, as the number of indoor units increases, the number of power supply wires and signal wires increases, and it is often difficult and difficult to route the wires, which is an obstacle to the installation work. In addition, even though the indoor unit of multi-type configuration has exactly the same function and structure,
The control method software and the added signal line will be managed as a separate model, which complicates inventory management.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art, and in a multi-type air conditioner, a power supply line is used instead of a dedicated signal line for controlling the outdoor blower during defrosting. It is an object of the present invention to provide an air conditioner control device capable of controlling the operation of an outdoor blower only by itself.

[0004]

In order to achieve the above object, an outdoor unit discrimination circuit is provided in an indoor unit, and the outdoor unit discrimination circuit is connected to an outdoor blower control circuit of the outdoor unit by a power supply connection line to provide the outdoor unit. The output voltage of the machine discrimination circuit determines whether the outdoor unit is a single type configuration or a multi-type configuration.When the outdoor unit has a multi-type configuration, even if one of the indoor units is defrosting, the outdoor blower It was controlled to continue the operation.

[0005]

According to the above construction, when the outdoor blower control circuit provided in the outdoor unit and the outdoor unit discrimination circuit of the indoor unit are connected by the power line and the indoor unit is connected to the power source, the outdoor unit is controlled through the outdoor blower control circuit. The voltage generated at the output terminal of the determination circuit determines the state of the outdoor unit, and when one indoor unit starts defrosting, the other indoor unit keeps the outdoor blower operating normally and the other indoor unit operates normally. To ensure.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 and 2 are main-part block wiring diagrams showing one embodiment of the present invention. FIG. 1 shows a single-type configuration, and FIG. 2 shows a multi-type configuration. An indoor unit 1 shown in FIG. 1 is provided with an outdoor unit discriminating circuit 2 of the present invention in parallel with a relay switch 6 for driving an outdoor blower 5, and the outdoor unit discriminating circuit 2 includes a current limiting resistor R1, a photocoupler PH1,
It is composed of a half-wave blocking diode D1 and the output of the photocoupler PH1 is sent to the control unit 7 of the indoor unit 1. In the figure, R2 is a load resistance and C1 is a rectifying capacitor. The outdoor unit 3 is provided with a compressor, an outdoor heat exchanger, and an outdoor blower 5, and the outdoor blower 5 is configured to be driven by drawing in power wiring connected to a relay switch 6 that drives the outdoor blower 5. There is. In addition to the power supply wiring connected to the outdoor blower 5, the power supply wiring connected from the indoor unit 1 to the outdoor unit 3 includes power supply wiring for controlling the compressor, but it is omitted because it is unnecessary for the description. On the other hand, in the case of the multi-type configuration shown in FIG. 2, the outdoor blower control including the indoor unit 1 having the outdoor unit discrimination circuit 2 shown in FIG. The circuit 4 is formed, the drive relay RYA of the outdoor blower 5 is connected to the output side of the photocoupler PH2, and the photocoupler P2 is connected.
The operation of the outdoor blower 5 is controlled by the output of H2.

When the outdoor unit 3 has a single type construction as shown in FIG. 1, when the outdoor unit 3 is connected to the indoor unit 1 and the power source 8 is connected to the indoor unit 1, the current limiting resistance R
1, a weak current I flows through the photocoupler PH1 and the half-wave blocking diode D1, the photocoupler PH1 is turned on, and a voltage is generated at the output terminal connected to the control unit 7.

When the outdoor unit 3 has a multi-type construction,
As shown in FIG. 2, the outdoor unit discrimination circuit 2 of the indoor unit 1 and the outdoor blower control circuit 4 are connected, and the half-wave blocking diode D1 of the outdoor unit discrimination circuit 2 and the half-wave blocking diode D2 of the outdoor blower control circuit 4 are connected. Are connected in the reverse direction, and when the power supply 8 is connected to the indoor unit 1 in this state as in the case of the single type configuration, the weak current I does not flow because the half-wave blocking diodes D1 and D2 are in the reverse direction, and the photocoupler Since PH1 does not operate, no voltage is generated at the output terminal. In this way, the output terminal voltage of the photocoupler PH1 is taken into the control unit 7, and it is discriminated whether it is a single type configuration or a multi type configuration. In the case of the multi type configuration, when one indoor unit 1 enters defrosting, an outdoor blower. It is possible to form an OR logic circuit by prohibiting the signal for stopping 5 and continue the normal operation of the other indoor unit 1. The outdoor unit discrimination circuit 2 is short-circuited at the same time when the relay switch 6 operates, and becomes irrelevant during normal operation of the air conditioner.

[0009]

As described above, in the present invention, the outdoor unit and the indoor unit are connected by the power supply wiring, and the outdoor unit determination circuit provided in the indoor unit determines whether the outdoor unit has the multi-type configuration or the single-type configuration. In the multi-type configuration, when one of the indoor units enters defrost, by forming an OR logic circuit that prohibits the signal that stops the outdoor blower, the normal operation of the other indoor unit is achieved. The operation can be continued safely, the dedicated signal line in the conventional example is not required, and the connection wiring can be laid out, the installation work can be simplified, and the indoor unit can be shared.

[Brief description of the drawings]

FIG. 1 is a principal block wiring diagram showing an example of a single type configuration of the present invention.

FIG. 2 is a main-portion block wiring diagram showing an example of a multi-type configuration of the present invention.

FIG. 3 is a main-portion block wiring diagram showing an example of a conventional multi-type configuration.

[Explanation of symbols] 1 indoor unit 2 outdoor unit discrimination circuit 3 outdoor unit 4 outdoor blower control circuit 5 outdoor blower 6 relay switch 7 control unit 8 power supply

Claims (1)

(57) [Claims] 1. A plurality of indoor units are connected to one outdoor unit,
In an air conditioner control device that controls the operation of an outdoor unit from each indoor unit, an outdoor unit discrimination circuit is provided in the indoor unit, and the outdoor unit discrimination circuit is an outdoor blower control circuit for the outdoor unit by a power supply connection line. And whether the outdoor unit has a single-type configuration or a multi-type configuration based on the output voltage of the outdoor unit determination circuit, and when the outdoor unit has a multi-type configuration, one of the indoor units is being defrosted. A control device for an air conditioner, which controls to continue operating the outdoor blower even if there is.