Heat exchanger with defrosting device

Abstract

The invention provides a heat exchanger with a defrosting device. A plurality of dense tube bundle heat-exchange parts of the heat exchanger are connected in series and penetrate through the defrosting device longitudinally, a formaldehyde injection device of the defrosting device is in an annular cylinder shape and is fixedly connected with a bottom plate, a methanol absorption device is locatedinside of the formaldehyde injection device, first through holes are evenly distributed in the part, between the formaldehyde injection device and the methanol absorption device, of the bottom plate,and the dense tube bundle heat-exchange parts are longitudinally mounted between the annular formaldehyde injection device and the methanol absorption device and penetrate out of the circular throughholes of the bottom plate. The problem that a heat exchanger in the prior art is not provided with a matched defrosting device is solved, the heat exchanger with the defrosting device is provided, thedefrosting device is additionally arranged in the microchannel heat exchanger, and the temperature and the partial pressure of water vapor in air inside the heat exchanger are decreased through the volatility and mutual solubility of methanol liquid, so that the air passes through the heat exchanger quickly without frosting, and the risk that the loss of the heat-exchange efficiency is generateddue to frosting of the microchannel heat exchanger is reduced accordingly.

Description

technical field [0001] The invention relates to a heat exchanger with a defrosting device, belonging to the technical field of heat exchange equipment. Background technique [0002] Since the heat exchanger uses cryogenic liquid helium as a coolant, water vapor in the air freezes within seconds as it passes through the heat exchanger. A large amount of liquid phase water is precipitated during cooling, and this water must be discharged from the heat exchanger before being frozen. With the sudden contact between the main body of the heat exchanger and the air, it is necessary to find a way to prevent the water vapor from forming frost. [0003] Due to its advantages of small size and light weight, the dense tube heat exchanger has become an important new direction of heat exchanger research and development. However, due to the complex and fine structure of the dense tube heat exchanger, while meeting the heat exchange efficiency , the problem of defrosting the heat exchanger...

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the problem that the heat exchanger in the prior art does not have a matching defrosting device, and provides a heat exchanger with a defrosting device. The frost device uses the volatility and miscibility of methanol liquid to reduce the temperature and partial pressure of water vapor in the air inside the heat exchanger, so that the air passes through the heat exchanger quickly without frosting, thereby reducing the microchannel heat exchanger due to condensation. Risk of loss of heat exchange efficiency due to frost

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