JPS5956052A - Controller for flow of refrigerant of refrigerator - 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 the Invention The present invention relates to a refrigerant flow control device for a refrigerator.

Conventional structure and its problems Conventionally, in refrigerators equipped with a compressor, etc., heat loss caused by high-temperature, high-pressure liquid refrigerant flowing from the condenser into the low-pressure evaporator when the compressor is turned off is prevented. In addition, in order to prevent liquid refrigerant that has accumulated in the evaporator from being sucked into the compressor during restart, the first
As shown in the figure, valves were provided in both the conduit between the condenser 2 (and the evaporator) and the conduit on the suction side of the compressor to close the circuit when the compressor was turned off.

However, in the case described in -, the valve shuts off the pipeline when the compressor is turned off, which prevents high-temperature, high-pressure refrigerant from flowing into the evaporator, but prevents refrigerant from flowing from the condenser into the compressor. In terms of behavior it is not possible. Unfortunately, this has the disadvantage that it causes a pressure drop in the condenser and takes time to start up when the compressor is restarted.

Purpose of the Invention The present invention has been made in view of the above-mentioned drawbacks of the prior art, and its purpose is to transfer refrigerant from the condenser to the evaporator when the compressor is turned off. and condensation: ): ÷ L) The objective is to prevent refrigerant movement through the compressor and to speed up the rise time when the compressor is restarted.

Structure of the Invention The present invention provides a refrigeration cycle in which a pressure compressor, a condenser, a pressure reducer, and an evaporator are connected in a ring. The pipe and the pipe on the suction side of the compressor are each provided with a valve 1 that opens the pipe when the compressor is on, and closes the pipe when the compressor is off.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2 and 3 of the drawings.

1 is a compressor, 2 is a condenser, 3 is a condenser fan, 4 is a pressure reducer, 6 is an evaporator, 6 is an evaporator fan, 7 is an ackee
Numerators 9, 10, and 11 are electromagnetic valves, which are connected to form a refrigeration cycle. 8 is a thermistor that detects the indoor air temperature; 12 is a power source; 13 is an operation switch; 14 is a relay that controls energization of the motor of the compressor 1;
16 is a relay that controls the energization of the motor of the condenser fan 3; 16 is a relay that controls the energization of the motor of the evaporator fan 6; 17 is a relay that controls the activation of each relay 14, 16, and 16 according to the temperature detected by the thermistor 8; and at the same time control the solenoid valve 9. io, 11 (not shown).

1... is in the above j.1 formation, and its operation will be explained next.

When trying to cool an air-conditioned room, first turn on operation switch 1.
3, the indoor air temperature detected by the thermistor is higher than the set temperature, so the control device 14 closes each relay 14, 16.16, and connects the compressor 1, condenser fan 3, and evaporator fan 6. At the time of starting, the solenoid valve 9°10.110 coil (not shown) is energized to open the pipe. .

As a result, the gas refrigerant compressed to high temperature and high pressure in the compressor 1 is condensed in the condenser 2 to become a high temperature and high pressure liquid refrigerant, and the pressure is reduced to 8.
The refrigerant is reduced in pressure by ÷4 and becomes a low-temperature, low-pressure refrigerant, flows into the evaporator 6, evaporates, passes through the achievator 7, and returns to the compressor 1. At this time, heat exchange is carried out with the surrounding indoor air in the evaporator 5, and the cool air is blown out by the evaporator fan 6. As time passes, the indoor air temperature gradually decreases, and when it reaches the stop temperature of the compressor 1, the thermistor 8 detects this and the relay = 14° 16.
16 is opened and the compressor 1, condenser fan 3, and evaporator fan 6 are stopped, and at the same time, the solenoid valves 9, 10, and 11 are opened.
energization to the coil is also stopped to close the pipeline.

Thereafter, the above state is maintained until the temperature detected by the thermistor 8 reaches the operating start temperature of the compressor 1. When the operating start temperature is reached, the control device 17 closes each relay 14, 15, 16 to restart the compressor 1, etc., and at the same time, the coils of the solenoid valves 9, 10, 11 are energized to close the pipes. is an open circuit.

Hereinafter, similar operations will be repeated.

In this way, when the compressor 1 is off, the solenoid valve 9°10.11
Since the pipe is closed, the high-temperature, high-pressure liquid refrigerant condensed in the condenser 2 does not flow through the pressure reducer 4 to the low-pressure evaporator 5, and the high-temperature, high-pressure liquid refrigerant and the evaporator 5
By mixing with the low-temperature, low-pressure refrigerant present in the evaporator 5, the temperature and pressure of the evaporator 5 will not increase. And 1jiF
: Since the refrigerant moving from the compression mold 2 to the compressor 1 has a specific gravity, the pressure drop in the condenser 2 can be suppressed. As mentioned above, by closing the solenoid valves 9.1Q and 11 when the compressor 1 is off, the pressure inside the evaporator 2 becomes low and the pressure inside the condenser 5 becomes low.
Since the internal pressure is maintained at high pressure, when the compressor 1 is restarted, the time required for the high pressure on the discharge side and the low pressure on the suction side to reach a certain steady value is shortened, and the start-up becomes faster.

Furthermore, as another embodiment, the same effect can be expected even if the solenoid valve 10 is provided between the evaporator 2 and the pressure reducer 4, and the solenoid valve 11 is provided between the achievable mulrator 7 and the compressor 10.

In this embodiment, a solenoid valve is used as the well that opens and closes the pipe line of the refrigeration cycle, but if the function and effects of the present invention are to be brought out, the solenoid valve 10 may be replaced by a solenoid valve that senses pressure, temperature, etc. Solenoid valves 9 and 11 can be any two-way valve that operates.
A check valve may be used instead.

Effects of the Invention According to the present invention, the movement of refrigerant from the condenser to the evaporator when the compressor is turned off and the movement of refrigerant from the condenser through the inside of the compressor are prevented, and when the compressor is turned off, the refrigerant inside the evaporator is prevented from moving. Also, by maintaining a high pressure inside the condenser, the compressor can be turned back down to -1 ni faster by LL, and as a result, the operating ratio of the compressor decreases and the consumption is reduced over a period of time. This has excellent effects such as reducing power consumption and improving energy efficiency.

[Brief explanation of the drawing]

Fig. 1 is a refrigeration cycle diagram of an air conditioner according to the conventional example, Fig. 2 is a refrigeration cycle diagram of an air conditioner equipped with a refrigerant flow control device according to an embodiment of the present invention, and Fig. 3 is the same. A schematic electrical circuit diagram of an air conditioner is shown. 1... Compressor, 2... Condenser, 4...
...pressure reducer, 6...evaporation'&y, 9,10,1
T... Solenoid valve (ben.

Claims (1)

[Claims] In a refrigeration cycle in which a compressor, a condenser, a pressure reducer, and an evaporator are connected in a ring, a pipe line between the condenser and the evaporator that includes the pressure reducer, a pipe line on the compressor discharge side, and a pipe line on the compressor suction side. A refrigerant flow control device for a refrigerator, in which a valve is provided in each of the pipes to open the pipe when the compressor is on and close the pipe when the compressor is off.