Refrigerant circulating system

Abstract

The invention discloses a refrigerant circulating system. The refrigerant circulating system comprises a compressor (9), a condenser, an evaporator, a throttling device (15) and a four-way reversing valve; a pilot valve of the four-way reversing valve comprises a high-pressure pipeline A, a low pressure pipeline C, a first switching pipeline B and a second switching pipeline D; on the first station, the high pressure pipeline A is communicated with the second switching pipeline D, and the low pressure pipeline C is communicated with the first switching pipeline B; on the second station, the high pressure pipeline A is communicated with the first switching pipeline B, and the low pressure pipeline C is communicated with the second switching pipeline D; and a third station is further included, and at the third station, the high-pressure pipeline A is communicated with the first switching pipeline B and the low pressure pipeline C. By means of the system, the pressure of the high pressure side and the pressure of the low pressure side of the system can be fast balanced, the system is in a pressure equalization state, and therefore the purpose that high temperature refrigerants can be utilized to perform defrosting without switching the work states is achieved, the heating efficiency of the system is improved, and more comfortable living environment and office environment can be provided.

Description

technical field [0001] The invention relates to the technical field of refrigeration or heating by using a refrigerant, in particular to refrigerant circulation systems such as air conditioners, compressors, refrigerators, and water heaters. Background technique [0002] At present, refrigerant circulation systems such as heat pump air conditioners and water heaters mainly rely on four-way reversing valves to switch the refrigerant flow channels in the system, thereby realizing the cooling, heating, defrosting and other functions of the entire system. [0003] The pilot valve part is one of the important components of the four-way reversing valve. It is used for the reversing of the main valve body and builds the necessary foundation for the normal work of other parts to realize the basic functions of the four-way reversing valve. [0004] like figure 1 As shown, when the coil of the pilot valve of the four-way reversing valve is not energized, its core iron is disengaged f...

AI Technical Summary

Problems solved by technology

[0007] When the surface of the heat exchanger of the outdoor unit needs to defrost, the system needs to switch from the heating state to the cooling state. During this period of frost, the indoor unit of the air conditioner does not blow out hot air, which means that the temperature of the room or office will continue to drop, which affects people's comfort to a certain extent.

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