Air conditioner and heat exchanger thereof

Abstract

The invention provides an air conditioner and a heat exchanger of the air conditioner. The heat exchanger comprises a shell and heat exchanging tubes arranged on the shell. The heat exchanging tubes form multiple flow distributing branch paths which are sequentially distributed in the height direction of the shell. The bottom flow distributing branch path located at the bottom end of the shell comprises a first branch path section, a second branch path section and a third branch path section in a sequential communication mode. A refrigerant inlet of the bottom flow distributing branch path is formed in the first branch path section, and a refrigerant outlet of the bottom flow distributing branch path is formed in the third branch path section. In the height direction of the shell, the first branch path section is located at the bottom end of the second branch path section, and the second branch path section is located at the bottom end of the third branch path section. At the end of the bottom flow distributing branch path, the flowing path of the first branch path section is in a U type, the flowing path of the second branch path section is in a snakelike line type, and the flowing path of the third branch path section is in an inverted-U type. According to the heat exchanger, cold air at the bottom of the shell is heated better, and the air outlet temperature of the bottom of the air conditioner is raised, so that the air outlet temperature difference of air outlets is reduced, and the heating performance of the air conditioner is improved.

Description

technical field [0001] The present invention relates to the technical field of air conditioning, and more specifically, relates to an air conditioner and a heat exchanger thereof. Background technique [0002] In the air conditioner, the indoor unit of the vertical cross-flow fan air conditioner usually has multiple air outlets. During the heating process, the cold air passes through the indoor heat exchanger and is directly discharged from the air outlets. At present, the refrigerant flow path in the indoor heat exchanger is in an inverted U shape, such as figure 1 As shown, the heat exchanger includes a plurality of branch branches 11, which are distributed from the top to the bottom in turn. The branch branches 11 located at the bottom of the heat exchanger, the high-temperature gaseous refrigerant flows in an inverted U-shaped flow path, specifically, the high-temperature gaseous The refrigerant flows in from the refrigerant inlet 111 , first flows upwards along the inv...

AI Technical Summary

Problems solved by technology

[0003] Since the temperature of the refrigerant gradually decreases during the flow of the refrigerant, for the bottom branch, when the refrigerant flows to the rear section of the bottom branch, the temperature of the refrigerant is low, resulting in the cold air not being heated effectively, making the exit If the wind temperature is low, the temperature difference between the highest position and the lowest position of the air outlet is large, and the maximum temperature difference can reach 16°C, resulting in low heating performance of the air conditioner

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