Heat exchanger

Abstract

The invention discloses a heat exchanger. The heat exchanger comprises a housing and a heat exchange core body, wherein the heat exchange core body comprises a flat tube with a refrigerant runner therein; the flat tube is provided with a plurality of flat parts which are parallel to each other and bending parts for connecting adjacent two flat parts in a transitional mode; at least one part of each flat tube is positioned inside the housing; a cooling liquid runner is formed inside the housing; the part of the cooling liquid runner of the housing is divided into at least two cooling liquid flow paths which are arranged side by side in a direction parallel to the flat parts of the flat tube, and flow directions of the adjacent two cooling liquid flow paths are reverse; the portion, at a turning position of the adjacent two cooling liquid flow paths, of the housing is provided with a hollow bulged part, and the bulged part is positioned above or below the turning position of the flat tube; and an inner cavity of the bulged part communicates with the adjacent two cooling liquid flow paths with reverse two directions. The heat exchanger disclosed by the invention can prolong the cooling liquid flow paths, improves heat exchange efficiency, and is relatively high in pressure bearing capacity.

Description

technical field [0001] The invention relates to the technical field of heat exchange devices, in particular to a CO 2 Refrigerant heat exchanger. Background technique [0002] CO 2 It is a new type of environmentally friendly refrigerant, which can reduce the global greenhouse effect and solve the problem of environmental pollution caused by compounds. It has good economy and practicability. [0003] with CO 2 The compression refrigeration cycle system as the working medium can be used in most refrigeration and heating fields. However, the working pressure of this type of air-conditioning system is very high. When designing the CO2 heat exchange device, this feature of this type of system needs to be fully considered. Due to the immature design of its components, this type of system has not been widely used. [0004] Generally speaking, CO 2 Heat exchangers mainly include tube-fin type, micro-channel, plate type, casing type and shell-and-tube type. Traditional CO2 micr...

AI Technical Summary

Problems solved by technology

However, the working pressure of this type of air conditioning system is very high. When designing the CO2 heat exchange device, this feature of this type of system needs to be fully considered. Due to the immature design of its components, this type of system has not been widely used

[0004]Generally speaking, CO2 heat exchangers mainly include tube-fin type, micro-channel type, plate type, casing type and shell-and-tube type. Traditional CO2 microchannel heat exchangers use refrigerant and air forced convection to exchange heat, and the heat exchange efficiency is low. At the same time, in order to meet the working pressure requirements, the wall thickness of the parts is set thicker, and the shell and joint processing are more complicated.

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