Outdoor heat exchanger and heat pump air conditioning system

Abstract

The invention relates to the technical field of heat pump air conditioning, in particular to an outdoor heat exchanger and a heat pump air conditioning system. The outdoor heat exchanger comprises a first collecting pipe, an inlet pressing plate and a drainage pipe. A refrigerant inlet, a drainage port and a refrigerant outlet are sequentially formed in the side wall of the first collecting pipe,a first partition plate and a second partition plate are arranged at the positions, in the axial direction of the first collecting pipe, of the two sides of the drainage port and located in the firstcollecting pipe, and multiple heat exchange pipes are arranged on the side, opposite to the refrigerant inlet, of the first collecting pipe. The inlet pressing plate communicates with the first collecting pipe and is connected with a pipeline for conveying refrigerant. One end of the drainage pipe communicates with the inlet pressing plate, and the other end of the drainage pipe is connected withthe drainage port. According to the outdoor heat exchanger, the distribution uniformity of the refrigerant is guaranteed, the heat exchange areas of the heat exchange pipes on the upper portion are fully utilized, thus, the frosting risk is reduced, and then the heating performance of the outdoor heat exchanger and the whole heat pump air conditioning system is improved.

Description

technical field [0001] The invention relates to the technical field of heat pump air conditioners, in particular to an outdoor heat exchanger and a heat pump air conditioner system. Background technique [0002] The heat pump air-conditioning system is energy-saving and efficient, and integrates heating and cooling, which can well meet the requirements of various users for comfort and low energy consumption. As an important part of the heat pump air conditioning system, the outdoor heat exchanger affects the efficient operation of the entire heat pump air conditioning system. [0003] In the outdoor heat exchangers in the prior art, a partition plate is basically arranged in the middle of the header where the refrigerant enters, so as to divide the header into two parts. When the system is heating, the outdoor heat exchanger is used as an evaporator, and the refrigerant entering the outdoor heat exchanger is usually in a gas-liquid two-phase mixed state. After the refrigera...

AI Technical Summary

Problems solved by technology

When the system is heating, the outdoor heat exchanger is used as an evaporator, and the refrigerant entering the outdoor heat exchanger is usually in a gas-liquid two-phase mixed state. After the refrigerant flows into the upper part of the header, due to the effect of gravity, The liquid refrigerant is very easy to concentrate in the area close to the partition plate, that is, it is concentrated below the upper part of the header, so that the liquid refrigerant flowing in the upper area is less, and the liquid refrigerant flowing in the lower area is more, resulting in the failure of the outdoor heat exchanger. The upper heat exchange area is not fully utilized, and the surface is prone to frost during heating, which in turn affects the heating performance of the entire heat pump air conditioning system

[0004] Therefore, it is necessary to propose an outdoor heat exchanger that can solve the problem in the prior art that due to the uneven distribution of refrigerant, the surface of the outdoor heat exchanger is prone to frost during heating, thereby weakening the heating performance of the entire heat pump air conditioning system.

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