a heat exchanger

Abstract

The invention discloses a plate heat exchanger. The plate heat exchanger comprises a plurality of first circulating boards and a plurality of second circulating boards which are arranged in a spaced and overlapped mode; first circulating channels and second circulating channels which are arranged in a spaced mode are formed among the first circulating boards and the second circulating boards. The heat exchanger further comprises a first externally connected pipe, a second externally connected pipe, a third externally connected pipe and a fourth externally connected pipe. At least one damp structure is formed in the heat exchanger. At least one of the first externally connected pipe, the second externally connected pipe, the third externally connected pipe and the fourth externally connected pipe is communicated with the first circulating channels or the second circulating channels through the damp structures. The flow passage area of the damp structures is smaller than the flow passage area of the main body parts, communicated with the damp structures, of the externally connected pipes. The heat exchanger can restrain the phenomenon of refrigerant gas and liquid layering caused by the long inlet pipe section of fluid and improve the distribution uniformity of fluid in each refrigerant channel inside a core body of the plate heat exchanger, thereby improving the heat exchange performance.

Description

technical field [0001] The invention relates to the technical field of heat exchange, in particular to a heat exchanger. Background technique [0002] A plate heat exchanger is defined as a heat exchanger in which the heat transfer element is composed of circulation plates. The circulation plate is its core component. The common fin types are: herringbone corrugation, horizontal straight corrugation, spherical corrugation, oblique corrugation and vertical corrugation etc. In order to enhance the heat exchange effect of the plate heat exchanger, people have continuously developed and improved its circulation plate structure. [0003] Compared with the traditional heat exchanger, the structure of the plate heat exchanger is very compact; it is mostly made of aluminum alloy, which is very light; at the same time, due to the high thermal conductivity of the circulating plates, the plate heat exchanger has a high efficiency. Therefore, the plate heat exchanger has strong adapta...

AI Technical Summary

Problems solved by technology

In the distribution flow channel, the gas-liquid stratification phenomenon of the fluid is intensified, so that some fluids entering the flow channel between the plates have more gas and some liquid, which further reduces their distribution uniformity in each flow channel, making the plate type The heat transfer performance of the heat exchanger is reduced

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