Defrosting device for dense heat exchanger

Abstract

The invention provides a defrosting device for a dense heat exchanger. A bottom plate of the defrosting device is a circular plate provided with a circular through hole; an outer ring support plate islocated on the opposite side of the bottom plate, is in a ring shape, and has the same diameter as the bottom plate; a plurality of methanol injection pipes are fixed between the bottom plate and theouter ring support plates at equal intervals; an inner ring support plate is located inside the outer ring support plate, and a plurality of methanol absorption pipes are fixed between the bottom plate and the inner ring support plate; and first through holes which are evenly distributed are formed in the part, located between the outer ring support plate and the inner ring support plate, on thebottom plate. The defrosting device solves the problem that a defrosting device matched with the dense heat exchanger does not exist in the prior art, the defrosting device for the dense heat exchanger is provided, the volatility and mutual solubility of the methanol liquid are used for reducing the temperature and partial pressure of the water vapor in the air in the heat exchanger to enable theair to quickly pass through the heat exchanger without generating frost, and the risk of loss of heat exchange efficiency of a micro-channel heat exchanger due to frost formation is reduced.

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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