A defrosting method based on a heat exchanger defrosting device

Abstract

The present invention proposes a defrosting method based on a heat exchanger defrosting device. In this method, the hot air first passes through the methanol injection device, then the methanol injection pump is turned on, and the pumped methanol enters the heat exchange part of the dense tube bundle through the side micropores; Methanol and hot air flow into the heat exchange part of the dense tube bundle, and the volatility and miscibility of the methanol liquid are used to reduce the temperature and partial pressure of the cooled hot air between the heat exchange parts of the dense tube bundle; then the unvolatile methanol flows into the inner methanol absorption tube , turn on the connected vacuum pump to absorb the methanol solution in the methanol absorption tube. The problem in the prior art that there is no defrosting method for the heat exchanger is solved. The invention is based on the heat exchanger defrosting device added in the microchannel heat exchanger, and utilizes 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 can pass through the heat exchange quickly. The microchannel heat exchanger does not generate frost, thereby reducing the risk of loss of heat exchange efficiency due to frost formation in the microchannel heat exchanger.

Description

technical field [0001] The invention relates to a defrosting method based on a heat exchanger defrosting device, and belongs to the technical field of defrosting methods. 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...

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the problem in the prior art that there is no defrosting method for the heat exchanger, and provides a defrosting method based on the heat exchanger defrosting device, mainly based on the heat exchanger added in the microchannel heat exchanger The 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 heat exchanger due to Risk of loss of heat exchange efficiency due to frost formation

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