Four-way reversing valve and pilot valve body thereof

Abstract

The invention discloses a four-way reversing valve and a pilot valve body thereof. The four-way reversing valve comprises a high-pressure pipeline A, a low-pressure pipeline C, a first switchover pipeline B and a second switchover pipeline D, wherein at a first working station, the high-pressure pipeline A communicates with the second switchover pipeline D and the low-pressure pipeline C communicates with the first switchover pipeline B; and at a second working station, the high-pressure pipeline A communicates with the first switchover pipeline B and the low-pressure pipeline C communicates with the second switchover pipeline D. The four-way reversing valve is characterized by further comprising a third working station, and the high-pressure pipeline A communicates with the low-pressure pipeline C at the third working station. By adoption of the four-way reversing valve and the pilot valve body thereof, the pressure on the high-pressure and low-pressure sides of a system can be quickly balanced, thereby enabling the system to enter the equal-pressure state; and accordingly, the purpose of defrosting by utilizing a high-temperature refrigerant can be fulfilled without switching the working states.

Description

technical field [0001] The invention relates to the technical field of refrigeration or heating by means of refrigerants, in particular to a four-way reversing valve and a pilot valve used in systems such as air conditioners, compressors, refrigerators, and water heaters. Background technique [0002] The four-way reversing valve is mainly used in heat pump air conditioners, water heaters and other systems to realize the switching of refrigerant flow channels in the system, and then realize the functions of cooling, heating and defrosting of the whole 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 dise...

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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