A defrosting device for dense heat exchanger

Abstract

The present invention proposes a defrosting device for a dense heat exchanger. The bottom plate of the device is a circular plate provided with a circular through hole 1, and the outer ring support plate is located on the opposite side of the bottom plate, and has a ring shape, and its diameter is the same as The base plates are the same, several methanol injection tubes are fixed circularly between the base plate and the outer ring support plate at equal intervals, the inner ring support plate is located inside the outer ring support plate, several methanol absorption tubes are fixed between the base plate and the inner ring support plate, and the base plate is located The part between the outer ring support plate and the inner ring support plate is provided with evenly distributed through holes one. It solves the problem that there is no defrosting device matching the dense heat exchanger in the prior art, and provides a defrosting device for the dense heat exchanger, which utilizes the volatility and miscibility of methanol liquid to reduce the heat loss of the heat exchanger. The temperature and partial pressure of water vapor in the internal air allow the air to pass through the heat exchanger quickly without frosting, thereby reducing the risk of loss of heat exchange efficiency of the microchannel heat exchanger due to frosting.

Description

technical field [0001] The invention relates to a defrosting device for a dense heat exchanger, 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 exch...

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Problems solved by technology

[0004] The present invention solves the problem that there is no defrosting device matching the dense heat exchanger in the prior art, and provides a defrosting device for the dense heat exchanger. A set of defrosting devices is added to the microchannel heat exchanger The heat exchanger defrosting 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 exchange rate. Risk of loss of heat exchange efficiency due to frosting of the heater

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