Air source heat exchanger system

Abstract

The invention relates to the technical field of heat exchangers, in particular to an air source heat exchanger system. The system includes a coolant distributer, a heat exchanger body and a defrostingbypass tool. A cold liquid pipe group is arranged on the heat exchanger body and connected to the coolant distributer through a liquid distribution pipe, the defrosting bypass tool includes a check valve and a connecting pipe, one end of a liquid outlet of the check valve is connected to a liquid inlet of the coolant distributer, and one end of the check valve is connected to the cold liquid pipegroup through the connecting pipe. The system is simple in structure, and during heat generation, due to the effect of the check valve, the connecting pipe is not communicated with the coolant distributer. Therefore, the heat generation performance of the system is not influenced; during defrosting, since the cold liquid pipe group is connected with the connecting pipe and meanwhile connected tothe coolant distributer through the liquid distribution pipe, coolants in the cold liquid pipe group can flow at the same time through the liquid distribution pipe and the connecting pipe, the flow ofthe coolants within unit time is increased, the flowing resistance of the coolants is reduced, and therefore the fast defrosting effect of the cold liquid pipe group is achieved.

Description

technical field [0001] The invention relates to the technical field of heat exchangers, in particular to an air source heat exchanger system. Background technique [0002] Traditional air source heat pump finned heat exchangers mostly use a brass distributor with a single liquid pipe splitting design. Low air volume and small air volume, heating or hot water in a low temperature environment cannot avoid serious frosting on the cold liquid pipe of the finned heat exchanger far away from the air inlet. Even when the unit enters the defrosting state, due to the The cold liquid pipe in the lower part of the heat exchanger is filled with liquid refrigerant, and the resistance of the refrigerant is much larger than that in the upper part of the finned heat exchanger. The defrosting effect is very poor, which greatly increases the energy consumption of the unit. [0003] Analysis from the principle: When the air source heat pump unit operates in the heating mode in a low temperatu...

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Problems solved by technology

[0004] At the same time, since the copper tube at the lower part of the fin heat exchanger is filled with liquid refrigerant, the resistance of the refrigerant will be much greater than that at the upper part of the fin heat exchanger, and the unit enters the defrosting state, and a large amount of high-temperature gaseous refrigerant will preferentially pass through the fins with lower resistance. The upper part of the fin heat exchanger, so the upper part of the finned heat exchanger defrosts quickly and the defrosting effect is good, while the lower part of the finned heat exchanger defrosts slowly and the defrosting effect is poor

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