Evaporator

Abstract

The invention discloses an evaporator. The evaporator comprises a first core body, a second core body and a connecting pipe, wherein the first core body comprises a first flow collecting pipe, a second flow collecting pipe and a plurality of first heat exchange pipes communicating with the first flow collecting pipe and the second flow collecting pipe, the first flow collecting pipe communicates with a refrigerant inlet, the second core body comprises a third flow collecting pipe, a fourth flow collecting pipe and a plurality of second heat exchange pipes communicating with the third flow collecting pipe and the fourth flow collecting pipe, the fourth flow collecting pipe communicates with a refrigerant outlet, the connecting pipe is connected with the second flow collecting pipe and the third flow collecting pipe, so that the first core body is communicated with the second core body, the first core body comprises a first inner volume used for circulating a refrigerant, the second core body comprises a second inner volume used for circulating the refrigerant, and the second inner volume is larger than the first inner volume. Through the arrangement, the heat exchange performance of the evaporator is improved.

Description

technical field [0001] The invention relates to an evaporator and belongs to the technical field of refrigeration system components. Background technique [0002] Existing evaporators are usually designed with multiple layers, ie, two or more layers, in order to improve the heat exchange capacity. This multi-layer evaporator usually includes a first header at one end, a second header at the other end, and several heat exchange tubes communicating with the first header and the second header. , and several fins fixed to the heat exchange tubes. The heat exchange tubes are bent to form multiple layers. [0003] The advantage of the evaporator with this structure is that only two headers are needed, one of which communicates with the refrigerant inlet, and the other communicates with the refrigerant outlet, thereby saving the number of parts. [0004] However, the disadvantages of this design are: the heat exchange tube is easily damaged when the heat exchange tube is bent, t...

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Problems solved by technology

[0004] However, the disadvantages of this design are: the heat exchange tube is easily damaged when the heat exchange tube is bent, thereby reducing the durability of the product; fins cannot be installed at the bend of the heat exchange tube, resulting in air leakage at the top of the evaporator, Affect the heat transfer performance; the structure of each layer of the multi-layer evaporator is the same, and the heat transfer capacity of each layer cannot be adjusted, which leads to a huge heat transfer of the layer connected to the refrigerant inlet, resulting in a large amount of condensed water on this side Aggregation affects the electrical equipment; in addition, the flow direction of the refrigerant in at least one layer of this evaporator has a downward component (whether it is vertically downward or obliquely downward). When the refrigerant is a gas-liquid two-phase, due to the gaseous refrigerant The volume is small, and it tends to flow upward, but this design has to force the refrigerant to flow downward, which leads to greater flow resistance of the refrigerant and affects the performance of the evaporator

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