Heat exchange assembly capable of achieving switching of working conditions and heat exchanger

Abstract

The invention provides a heat exchange assembly capable of achieving switching of working conditions and a heat exchanger, and relates to the field of capillary tube heat exchange. The heat exchange assembly capable of achieving switching of the working conditions comprises main line pipes and a capillary tube group; a reversing valve is connected in, the pair of main line pipes are communicated through the capillary tube group, and the reversing valve is used for switching the flow direction of media in the capillary tube group; and the capillary tube group comprises a first heat exchange branch tube and a second heat exchange branch tube which are arranged in parallel, wherein the first heat exchange branch tube is a two-way conduction capillary tube, and the second heat exchange branch tube is a one-way conduction capillary tube connected with a Tesla valve in series. The two-way circulation capillary tube and the one-way circulation capillary tube are adopted, through the difference between the working states of the capillary tubes during forward flow and reverse flow, the flow directions in the capillary tubes are switched through the reversing valve, and rapid switching of the working conditions can be achieved without adjusting the opening degree of the valve.

Description

technical field [0001] The disclosure relates to the field of capillary heat exchange, in particular to a heat exchange assembly and a heat exchanger with switchable working conditions. Background technique [0002] As a kind of heat exchanger, capillary heat exchanger has high heat exchange efficiency and its application field is gradually expanding. However, due to the small diameter of the tube, the flow rate of the medium in the tube is relatively slow, and the medium in the tube can fully exchange heat with the environment outside the tube, which improves its heat exchange efficiency. [0003] The inventors found that the pressure drop of the fluid in the capillary is linear, and as the number of capillary arranged in parallel in the heat exchanger increases, some capillary will be cut off or backflow due to the pressure drop, which will affect the overall heat exchange efficiency of the heat exchanger. At present, for the adjustment of the heat exchange efficiency of ...

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Problems solved by technology

[0003] The inventors found that the pressure drop of the fluid in the capillary is linear, and as the number of capillary arranged in parallel in the heat exchanger increases, some capillary will be cut off or backflow due to the pressure drop, which will affect the overall heat transfer efficiency of the heat exchanger

At present, for the adjustment of the heat exchange efficiency of the heat exchanger, the flow of the main pipe is mostly adjusted through the opening of the valve, and as the opening of the valve decreases, the flow inside the capillary network will also change, resulting in inaccurate adjustment of the heat exchange efficiency. Controlled, the adjustment opening cannot correspond to the actual heat exchange efficiency, especially for the proportional adjustment of heat exchange efficiency, it is difficult to meet the needs of the heat exchanger for rapid switching of working conditions; in addition, for the heat exchange requirements of various working conditions that vary greatly Scenarios, especially for the capillary heat exchange system buried in the lining of the subway tunnel, although the change of the working condition can be realized by adjusting the opening of the valve, the precise adjustment after changing the working condition is still not possible, and the adjustment process can only rely on the dry water supply. The valve adjustment on the road is difficult to meet the adjustment requirements of heat exchange efficiency in multiple working conditions

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