JPS5926201Y2 - air conditioner - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an air conditioner with an improved refrigerant circulation structure.

For example, heat pump type air conditioners can perform cooling and heating operations by switching the four-way switching valve, but even if the amount of refrigerant circulated during cooling is less than the amount of refrigerant circulated during heating, it is still necessary. It is now possible to obtain a large amount of cooling capacity.

However, in conventional systems, the amount of refrigerant circulated during cooling and the amount of refrigerant circulated during heating are the same due to the configuration of the refrigeration cycle, and more refrigerant is circulated than necessary during cooling operation.

This has resulted in the disadvantage that the input to the compressor is increased, making it uneconomical.

The present invention was developed with attention to the above circumstances, and its purpose is to reduce the amount of refrigerant circulated during cooling operation compared to the amount of refrigerant circulated during heating operation, so that cooling operation can be performed with an appropriate amount of refrigerant. The present invention aims to provide an air conditioner that does the following.

An embodiment of the present invention will be described below with reference to FIG.

1 in the figure is a compressor, and this compressor 1 has two four-way switching valves in sequence.
, an outdoor heat exchanger 3, a cooling capillary tube 4, a check valve 5, and an indoor heat exchanger 6 are connected to form a heat pump type refrigeration cycle.

Further, the outflow side of the outdoor heat exchanger 3 during cooling operation and the inflow side of the indoor heat exchanger 6 are communicated via a bypass pipe 7 consisting of tube bodies 7a and 7b.
A heating primary capillary tube 8, a gas-liquid separator 9, and a heating secondary capillary tube 10 are disposed in the middle of the tube.

Further, the gas-liquid separator 9 and the compression chamber of the compressor 1 are communicated through an injection pipe 11, and a two-way valve 12 is installed in the middle of the injection pipe 11.

Further, the outflow side of the two-way valve 12 and the suction side of the compressor 1 are communicated via a release pipe 13.
A check valve 14 is provided in the middle of the valve.

Therefore, when the compressor 1 is operated in the above-described configuration, during cooling operation, the discharged refrigerant gas flows through the four-way switching valve 2 to the outdoor heat exchanger 3, where it is heat-radiated and condensed, as shown by the solid arrow. Later, it will be leaked.

A part of the liquid refrigerant that has flowed out is passed through the heating secondary capillary tube 10 of the bypass pipe 7 to the gas-liquid separator 9, and the other liquefied refrigerant is passed through the cooling capillary tube 4 and the check valve 5. The air is passed through the indoor heat exchanger 6, where it is evaporated and vaporized, and then sucked into the compressor 1.

Also, a part of the refrigerant gas during the compression process in the compressor 1 is released from the compression chamber to the release pipe and released to the suction side of the compressor 1, resulting in a low capacity operation.

Thereafter, the refrigerant is similarly circulated to continue the cooling operation.

In this way, during cooling operation, a part of the liquefied refrigerant flowing out from the outdoor heat exchanger 3 flows through the bypass pipe 7 to the gas-liquid separator 9 and collects it, so the refrigerant circulation is reduced accordingly. be done.

Therefore, cooling operation can be performed using an appropriate amount of refrigerant.

Note that if too much liquefied refrigerant accumulates in the gas-liquid separator 9, it will be flowed to the inflow side of the outdoor heat exchanger 6 via the pipe body 7b, so there is no need to worry about reducing the amount of refrigerant circulation too much. .

On the other hand, during heating operation, due to the switching operation of the four-way switching valve 2,
The discharged refrigerant gas is transferred to the indoor heat exchanger 6 as shown by the chain arrow.
After the heat dissipates and condenses, it flows through the heating primary capillary tube 8 of the bypass pipe 7 to the gas-liquid separator 9.

The liquefied refrigerant separated by the gas-liquid separator 9 is passed through the heating secondary capillary tube 10 of the bypass pipe 7 to the outdoor heat exchanger 3, where it is evaporated and vaporized, and then sucked into the compressor 1. Furthermore, the gas refrigerant in the gas-liquid separator 9 is sucked into the compression chamber of the compressor 1 via the injection 11.

Thereafter, the refrigerant is similarly circulated and the heating operation continues.

In this way, during heating operation, the liquefied refrigerant in the gas-liquid separator 9 flows through the bypass pipe 7 to the outdoor heat exchanger 3 and is circulated, so the refrigerant circulation is greater than during cooling operation, and sufficient heating capacity is achieved. It becomes possible to obtain.

As explained above, the present invention connects the outflow side of the outdoor heat exchanger and the inflow side of the indoor heat exchanger during cooling operation through a bypass pipe having a pressure reducer and a gas-liquid separator in the middle. During cooling operation, a part of the liquefied refrigerant flowing out from the outdoor heat exchanger flows through the bypass pipe to the gas-liquid separator and collects it, and during heating operation, the liquid collected in the gas-liquid separator Since the refrigerant is made to flow through the bypass pipe to the outdoor heat exchanger, the amount of refrigerant circulated during cooling operation is smaller than that during heating operation, and an appropriate amount of refrigerant is circulated during cooling operation. .

Therefore, it is possible to prevent an increase in input to the compressor during cooling operation, resulting in an extremely economical effect.

[Brief explanation of the drawing]

The drawing is a schematic diagram of a refrigeration cycle showing an embodiment of the present invention. 1... Compressor, 2... Four-way switching valve, 3
...Outdoor heat exchanger, 4...Reducer,
6... Indoor heat exchanger, 7... Bypass pipe, 8... Pressure reducer, 9... Gas-liquid separator.

Claims (1)

[Scope of utility model registration request] A four-way switching valve, an outdoor heat exchanger, a pressure reducer, and an indoor heat exchanger are sequentially connected to the compressor to configure a heat pump type refrigeration cycle, and the outflow side of the outdoor heat exchanger during cooling operation is configured. and the inflow side of the indoor heat exchanger through a bypass pipe that has a pressure reducer and a gas-liquid separator in the middle, and during cooling operation, a portion of the liquid refrigerant flowing out from the outdoor heat exchanger is transferred to the above pipe. Air that collects in a gas-liquid separator via a bypass pipe, and during heating operation, the liquid refrigerant collected in the gas-liquid separator flows through the bypass pipe to an outdoor heat exchanger. harmonizer.