Heat exchanger for air conditioning and air conditioner

Abstract

The invention provides a heat exchanger for air conditioning. The heat exchanger is characterized in that at least two rows of heat exchanger units are provided, wherein the heat exchanger units are formed by a plurality of U-shaped tubes which penetrate fins; the windward sides of the heat exchanger units are used as an outer row, and the leeward sides of the heat exchanger units are used as an inner outer row. The heat exchanger further comprises an inlet tube assembly and an outlet tube assembly; the diameter of the U-shaped tubes of the heat exchanger units gradually increases from the outer row to the inner row, and the space between the fins gradually decreases from the outer row to the inner row. The invention further provides an air conditioner employing the aforementioned heat exchanger. According to the heat exchanger for air conditioning and the air conditioner, a structure space of a box body of an outdoor unit is fully utilized; the diameter of the U-shaped tubes is reasonably selected according to the refrigerant flowing direction and the state variation of refrigerants in the flowing process, and meanwhile, the space between the fins in different rows is adjusted; the variation of the refrigerant flowing state can be effectively utilized to improve the heat exchange efficiency, so that the refrigerant resistance loss can be decreased, the heat exchange efficiency of the whole heat exchanger can be effectively improved, and meanwhile, the cost of the heat exchanger can be decreased; the problem that the heat exchange effect is poor when the box body is determined can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of air-conditioning and refrigeration engineering, and in particular relates to an air-conditioning heat exchanger and an air conditioner. Background technique [0002] At present, the heat exchangers commonly used in the outdoor units of air conditioners are two rows with the same U-shaped tube diameter and the same fin spacing, but the heat exchange efficiency of the refrigerant cannot be fully utilized. Due to user requirements and installation conditions, the current box body tends to be Miniaturized design. When the space of the box is constant, the heat exchange capacity of the two rows of heat exchangers is insufficient. In order to improve the heat exchange capacity, it is necessary to add half a row of heat exchangers. Therefore, it is necessary to re-open the large box, resulting in an increase in cost. At the same time, using its own characteristics, in the cooling mode, with the flow of the refr...

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Problems solved by technology

[0002] At present, the heat exchangers commonly used in the outdoor units of air conditioners are two rows with the same U-shaped tube diameter and the same fin spacing, but the heat exchange efficiency of the refrigerant cannot be fully utilized. Due to user requirements and installation conditions, the current box body tends

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