Heat exchanger and air conditioner with multiple refrigeration systems provided with heat exchanger

Abstract

The invention discloses a heat exchanger. The heat exchanger comprises first and second groups of refrigerant chambers, heat exchange tubes and fins, wherein the first and second groups of refrigerant chambers respectively extend along the horizontal direction, and refrigerant chambers in the first group correspond to the refrigerant chambers in the second group in a one-to-one manner to form N pairs of refrigerant chambers; the heat exchange tubes extend along the longitudinal direction, and are divided into N groups, wherein the ith group of heat exchange tubes comprise multiple ith heat exchange tubes, the first end of each ith heat exchange tube is communicated with one refrigerant chamber in the ith pair of refrigerant chambers, the second end of each ith heat exchange tube is communicated with the other refrigerant chamber in the ith pair of refrigerant chambers, the heat exchange tubes in any group and the heat exchange tube in the rest groups are alternately arranged, N is a positive integer greater than or equal to 2, and i is a positive integer less than or equal to N; the fins are arranged between the adjacent heat exchange tubes. The heat exchanger disclosed by the invention can be used for an air conditioner, and has the advantages of uniform outlet air temperature, high heat exchange efficiency, compact structure and the like.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to a heat exchanger and a multi-refrigeration system air conditioner with the heat exchanger. Background technique [0002] Multiple refrigeration system air conditioners usually have multiple refrigeration systems, that is, multiple refrigerant circuit systems. Taking the dual refrigeration system air conditioner as an example, it includes two independent refrigeration systems consisting of two compressors, two evaporators, two condensers and two expansion valves. [0003] The two evaporators of the traditional dual refrigeration system air conditioner are usually installed in the same air duct. The two evaporators can be configured as two independent evaporators arranged side by side, or as a single evaporator separated by a partition. two parts. [0004] For the case of two evaporators arranged side by side, when the two evaporators operate at the same time, the inlet air...

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Problems solved by technology

[0004] For the case of two evaporators arranged side by side, when the two evaporators operate at the same time, the inlet air temperature of the second evaporator on the windward side is lower, the heat exchange effect is poor, and a larger area is required to conduct Compensation reduces the economy and heat exchange efficiency, and it is difficult to balance the efficiency of full-load operation and part-load operation of the air conditioner, and the space required for the two evaporators is large

[0005] For the case where a single evaporator is divided into two parts by a partition, when a refrigeration system is closed, only a part of the evaporator participates in heat exchange, so that the temperature of the air passing through the evaporator is uneven, resulting in local condensation on the fan

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