Condenser pipe for refrigeration device in vending machine

Abstract

The invention provides a condenser pipe for a refrigeration device in a vending machine. The two ends of the condenser pipe are equal-diameter straight pipes, the middle portion of the condenser pipe is a corrugated pipe, an external thread is evenly arranged on the outer surface of the condenser pipe, and a baffle plate is arranged inside the condenser pipe. The condenser pipe for the refrigeration device in the vending machine has the beneficial effects that the inner side of the condenser pipe is in a sine wave shape, cooling water flows inside the condenser pipe to reach a turbulence state, the pipe wall of the condenser pipe is scoured, the chance of medium precipitating is small, scaling is difficult, and the problem of condenser pipe scaling is solved; the fluid is under the turbulence state, and the heat transfer coefficient of the condenser pipe is improved; during heat exchange, the curvature change of the inner surface of the condenser pipe, the axial expansion amount change due to expansion caused by heat and contraction caused by cold, and the linear expansion coefficient difference between the pipe wall and limescale are large, so that the limescale falls off; the sine wave is of an elastic structure, working stress is reduced, and the problem of stress corrosion is solved; the condenser pipe is externally provided with the external thread to puncture a refrigerant liquid film, small drops are quickly formed, and the heat exchanging efficiency of the condenser pipe is greatly improved; and the condenser pipe is externally provided with a notch to provide a flowing passage for dripping of drops formed through refrigerant condensation.

Description

technical field [0001] The invention relates to the field of condensers, and more specifically relates to a condenser tube used in a refrigeration device in an automatic vending machine. Background technique [0002] The condensing tube in the condenser is absorbed by cooling water for heat exchange. When working, the temperature of the inner and outer walls of the tube is different. Because the cooling water in the equal-diameter light tube is in a laminar flow state when flowing, it is easy to scale; and the hot gaseous refrigerant will form a layer of liquid film when it meets the condenser tube. The outer surface of the tube; both impede the conduction of heat. In order to improve the heat exchange efficiency, people do everything possible to increase the heat transfer area. [0003] The heat exchange tubes in the prior art mostly use ordinary smooth inner wall tubes. Therefore, the effective heat exchange area of ​​this type of heat exchanger is small, and the fluid i...

AI Technical Summary

Problems solved by technology

But it has the same defects as the existing equal-diameter light copper tubes: first, it is easy to scale, and because of its small-diameter internal thread and thin and high teeth, it is more prone to scaling and difficult to remove, and the condensation effect is reduced after scaling ; Second, because of the small-diameter, thin and high-tooth internal thread, the wall thickness of the copper pipe is increased, which increases the production cost

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