Heat exchanger assembly and indoor unit of air conditioner

Abstract

The invention discloses a heat exchanger assembly and an indoor unit of an air conditioner, wherein the heat exchanger assembly is used for the indoor unit of the air conditioner. The heat exchanger assembly is characterized by comprising a main heat exchanger, wherein the main heat exchanger comprises a front heat exchanger, a middle heat exchanger and a rear heat exchanger, wherein the front heat exchanger, the middle heat exchanger and the rear heat exchanger are both provided with at least two rows of heat exchange tubes and the number of the heat exchange tubes of the middle heat exchanger is more than that of the front heat exchanger and the rear heat exchanger, and a back pipe heat exchanger. The heat exchange flow path of the heat exchanger assembly is divided into a first branch,a second branch and a third branch after passing through the back pipe heat exchanger, and the first branch, the second branch and the third branch all flow from the heat exchange tube on the windwardside of the main heat exchanger to the heat exchange tube on the leeward side. The first branch flows through the heat exchange tubes of the front heat exchanger, the second branch flows through theheat exchange tubes of the middle heat exchanger, the third branch flows through the heat exchange tubes of the rear heat exchanger, and at least one of the first branch and the third branch is arranged across the heat exchange tubes of the middle heat exchanger. According to the technical scheme, the heat exchanger assembly can improve the energy efficiency of the heat exchanger.

Description

technical field [0001] The invention relates to the technical field of air-conditioning products, in particular to a heat exchanger assembly and an air-conditioning indoor unit. Background technique [0002] With the continuous improvement of energy efficiency standards for air conditioners at home and abroad, how to improve the heat exchange efficiency of the heat exchanger of the air conditioner has become an urgent problem to be solved. Among the many solutions, heat exchangers with high heat exchange efficiency are used in newly designed air conditioners or heat exchangers with high heat exchange efficiency are used to replace heat exchangers with low heat exchange performance of mass-produced air conditioners. Replacement is a more effective way. [0003] Existing air conditioner heat exchangers with better heat exchange performance generally include a front heat exchanger, a middle heat exchanger, and a rear heat exchanger. The three are semi-enclosed. The three-way ...

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Problems solved by technology

[0003] Existing air conditioner heat exchangers with better heat exchange performance generally include a front heat exchanger, a middle heat exchanger, and a rear heat exchanger. The three are semi-enclosed. The three-way pipe is divided into three ways, which respectively enter the front heat exchanger, middle heat exchanger and rear heat exchanger for heat exchange. However, due to the limitations of the front heat exchanger, middle heat exchanger and rear heat exchanger The rectangular space in the shell, therefore, their respective sizes are also different, so that the number of heat exchange tubes that can be installed in each heat exchanger also has a certain difference. Often the size of the middle heat exchanger is the front heat exchanger or the rear heat exchanger. The heat exchanger is 2 times or even more. Correspondingly, the number of heat exchange tubes set in the middle heat exchanger is far more than that of the front heat exchanger or the rear heat exchanger. In this way, the refrigerant enters the front heat exchanger or From the rear heat exchanger to the air conditioner heat exchanger, the number of heat exchange tubes passed by the refrigerant will be much smaller than the number of heat exchange tubes that the refrigerant passes through into the middle heat exchanger. When the heat is exchanged in the heat exchanger, it is likely to be discharged from the indoor heat exchanger without sufficient heat exchange, and when the heat is exchanged in the middle heat exchanger, it may occur that the heat has already been fully exchanged but still continues to flow through the heat exchange tube. Generally speaking, this kind of flow path design makes the heat transfer of the air conditioner heat exchanger unbalanced and reduces the energy efficiency of the air conditioner heat exchanger

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