JPS621638Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the improvement of a control circuit for an air conditioner that is equipped with a microcomputer and controls the operation of various devices via relays, etc. It also prevents wasteful power consumption as much as possible, which in turn extends the lifespan of parts.
The purpose is to increase reliability.

Conventionally, this type of control circuit is configured as shown in Fig. 4, and when the operating mode sent from the indoor side via transmission lines a and b is stopped, and when the compressor is OFF, the indoor inverters c, d, and e are turned off. Everything is turned off. At this time, the output is "L" for the operational amplifier f and below, and OFF for the compressor electromagnetic switch g and below.
However, the outdoor blower thermostat circuit, which consists of an outdoor temperature detection thermistor h, arithmetic amplifier i, and a blower electromagnetic switch j, and which changes the blower according to the outside temperature, is in a transmission mode sent from the indoor side. It works regardless.

Therefore, there was a situation in which the electromagnetic switch j for the blower was energized even though it was stopped or the compressor was stopped depending on the outside temperature. This wasteful power consumption goes against energy conservation and was supposed to stop the deterioration of the electromagnetic switch.

The present invention eliminates the drawbacks found in the above-mentioned conventional control circuits.

Hereinafter, the present invention will be explained with reference to FIGS. 1 and 2 of the accompanying drawings showing one embodiment thereof.

In the figure, 1 is the main operation switch, 2 is the indoor electronic control device, 3 is the outdoor electronic control device, 4 is the electromagnetic switch for the compressor, 5 and 6 are the electromagnetic switches for the blower, and 7 is the compressor. , indoor unit A and outdoor unit B are connected by transmission lines 8, 9, 10, and 11.

Next, referring to FIG. 2, the outdoor electronic control device will be explained in particular. Here, the same numbers as in FIG. 1 are given to the same parts. 12,13,1
4 is an inverter on the indoor side, 15 is a computational amplifier for compression control, 16 is a computational amplifier for blower control, 17 is a thermistor for detecting outdoor temperature, and 18 is an inverter.

In the above configuration, transmission lines 9 and 10 are connected from the indoor side.
When the operating mode sent by is stopped or the compressor is turned off, the indoor inverter 12,
3 and 14 are all turned off. At this time, the output of the operational amplifier 15 and below becomes "L" and the compressor electromagnetic switch 4 and below becomes OFF, but the thermistor 17 for outdoor temperature detection, the operational amplifier 16,
The outdoor blower thermostat circuit, which is composed of the blower electromagnetic switch 5 and changes the speed of the blower depending on the outside temperature, tends to operate regardless of the transmission mode sent from the indoor side.

However, since the input current of the inverter 18 is very small, when the compressor electromagnetic switch 4 is OFF, the blower electromagnetic switch 5 is forcibly turned OFF by the inverter 20.

Therefore, by adding one inverter 8 to the conventional circuit, wasteful power consumption can be prevented and the life of the electromagnetic switch 5 can be extended. Furthermore, since the temperature rise of the control circuit itself using the electromagnetic switch 5 is reduced, the overall lifespan and reliability can be increased.

Note that the inverter 18 may be located at the location shown in FIG. 3, and in short, it may be any location that interrupts the current to the electromagnetic switch 5.

As described above, the air conditioner control circuit according to the present invention can eliminate unnecessary power consumption.

[Brief explanation of drawings]

Fig. 1 is an electrical system diagram of an air conditioner equipped with a control circuit according to an embodiment of the present invention, Fig. 2 is a circuit diagram of the main part of the control circuit, and Fig. 3 is another implementation equivalent to Fig. 2. FIG. 4 is a circuit diagram of a main part showing an example. FIG. 4 is a circuit diagram of a main part showing a conventional example. 1... Main operation switch, 4... Electromagnetic switch for compressor, 5... Electromagnetic switch for blower, 7... Compressor.

Claims (1)

[Scope of utility model registration request] A compressor control circuit and a blower control circuit are provided independently in the outdoor unit of a separate type conditioner equipped with a main operation switch, and the compressor stop output of the compressor control circuit is used to control the A control circuit for an air conditioner including means for stopping energization of an electromagnetic switch for a blower having a voltage excitation coil.