JPS59153076A - Controller for operation of air conditioner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an operation control device for an air conditioner equipped with a refrigerant heater.

Conventional configuration and its problems In air conditioners equipped with a refrigerant heater, if the amount of refrigerant circulation is too large, a bypass circuit is installed that connects the suction side and the discharge side of the compressor to reduce the amount of refrigerant circulation. : In addition to this, we aim to reduce the input to the compressor.

Conventionally, in such air conditioners, in order to improve heating start-up performance, control has been taken to close a two-way valve provided in the middle of the bypass circuit when a certain set pressure is reached.

1~ However, with this kind of control, if the indoor temperature controller stops the heating operation before the set pressure is reached, the bypass two-way valve will close even though there is no need to start up quickly. until the set pressure is reached.
This method has the disadvantage that unnecessary input must be continued.

OBJECTS OF THE INVENTION The present invention eliminates the above-mentioned conventional drawbacks, and aims to reduce unnecessary consumption of electrical input at the start of heating operation.

Structure of the Invention In order to achieve this object, the present invention provides a bypass circuit having a two-way valve between the suction side and the discharge side of the compressor, and uses this two-way valve to control the operation and stop of the compressor. It is designed to open when the room temperature controller is stopped, and to open continuously after three pages.

This configuration reduces the restart load on the compressor and reduces power consumption.

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

In FIG. 1, 1 is a compressor, 2 is an indoor heat exchanger, and 3 is a refrigerant heater. These are connected in a ring shape by a refrigerant pipe to form a heating circuit.

A three-way valve 4 is provided in the middle of a bypass circuit connecting the suction side and the discharge side of the compressor 1, and opens when energized. Figure 2 is an operation control circuit diagram, 1 is a compressor,
3 is a refrigerant heater, 4 is a two-way valve, 6 is a pressure switch, 6 is a power switch, 7 is a thermometer for adjusting the indoor temperature, and a thermometer (Tanoto 7 has two switching contacts, and controls the indoor temperature. When the temperature is below the set temperature, the contact piece 7a is in contact with the A side, and when it is above the set temperature, the contact piece 7a is in contact with the P side. 8 is a coil, and when it is energized, the contact 9 is closed.

In the above configuration, when the power switch 6 is closed and the indoor temperature is below the set temperature, the contact piece 7a of the thermostat 7 is in contact with the A side, the compressor 1 and the refrigerant heater 3 are operated, and the compressor 1 The refrigerant discharged from the indoor heat exchanger 2. as shown by the arrow. The refrigerant flows to the refrigerant heater 3 and returns to the compressor 1, where heating is performed.

When the pressure reaches the set pressure, the contacts of the pressure cassette are closed and the three-way valve 4 is energized, and at the same time the coil 8 is also energized and the contacts 9 are closed. Once the pressure switch 5 operates, the two-way valve 4 will continue to be energized through the contact 9 even if the contact of the pressure switch is subsequently opened.

Therefore, when the three-way valve 4 is energized and opened, a part of the refrigerant sucked into the compressor 1 passes through the bypass circuit and flows to the discharge side of the compressor 1, reducing the amount of refrigerant circulation and reducing the input to the compressor 1. be done.

Here, even if the indoor temperature exceeds the set value without reaching the pressure at which the pressure switch 5 operates, the contact piece 7a of the thermostat 7 enters the P side, and similarly the three-way valve 4
opens. Normally, the two-way valve 4 is closed to increase the amount of refrigerant circulation until the pressure rises to a certain extent in order to improve the baler rising.
If the indoor temperature has reached a temperature at which the operation of the compressor 1 and refrigerant heater 3 is interrupted by the thermostat 7,
There is no need to improve the start-up during subsequent restarts, and therefore the restart consumption input of the compressor 1 due to the blockage of the three-way valve 4 can be reduced.

In this embodiment, the compressor and the indoor heat exchanger are used.

Although the heating circuit has been constructed using only the refrigerant heater, the same effect can be obtained by using a heating circuit in which a pressure reducing device is provided between the indoor heat exchanger and the refrigerant heater. A similar effect can be expected from an air conditioner that is also equipped with an outdoor heat exchanger and a pressure reducing device for cooling, and is used for both heating and cooling purposes.

Effects of the Invention As is clear from the above explanation, the air conditioner operation control device of the present invention uses an indoor temperature controller to continuously open the two-way valve of the bypass circuit when the compressor operation is once stopped. This has the effect of reducing the electrical input required when restarting the compressor.

[Brief explanation of the drawing]

FIG. 1 is a refrigerant circuit of an air conditioner having an operation control device according to an embodiment of the present invention, and FIG. 2 is an electric circuit diagram of the operation control device of the air conditioner. 1...Compressor, 2...Indoor heat exchanger, 3.
... Refrigerant heater, 4 ... Two-way valve, 6 ...
...Pressure casu note, 7...Thermostat for indoor temperature control (indoor temperature controller), 9...Contact (self-holding circuit).

Claims (1)

[Claims] A compressor, an indoor heat exchanger, and a refrigerant heater are connected in a ring through a refrigerant pipe to form a heating circuit, and the heating circuit is connected to the suction side of the compressor via a two-way valve that opens when a set pressure is reached. A bypass circuit connecting the discharge side is provided, an indoor temperature regulator is provided to open the two-way valve when the compressor stops operating, and a self-holding circuit is provided to keep the two-way valve open continuously. Air conditioner operation control device.