A heat exchanger with a defrosting device

Abstract

The present invention proposes a heat exchanger with a defrosting device. The heat exchange parts of multiple dense tube bundles of the device are connected in parallel and run through the defrosting device longitudinally. The formaldehyde injection device of the defrosting device is fixedly connected to the bottom plate in a ring shape. The methanol absorption device is located inside the formaldehyde injection device, and the part of the bottom plate between the formaldehyde injection device and the methanol absorption device is evenly distributed with through holes 1, and the heat exchange part of the dense tube bundle is installed longitudinally between the annular formaldehyde injection device and the methanol absorption device. And pass through the circular through hole of the bottom plate. It 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. A defrosting device is added to the microchannel heat exchanger to utilize the volatilization of methanol liquid compatibility and miscibility, 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 loss of heat exchange efficiency of the microchannel heat exchanger due to frosting risk.

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 greatly 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 heat transfer of microchannels. risk of loss of heat exchange efficiency due to frosting

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