Heat exchanger and its refrigeration system

Abstract

The invention discloses a heat exchanger and a refrigeration system thereof. The heat exchanger has a medium inlet and a medium outlet. The heat exchanger includes: a heat exchanger body, and the heat exchanger body includes a plurality of heat exchange tubes arranged at intervals Drainage pipe, the upper part of the drainpipe is provided with a vent valve and the lower part is provided with a drain outlet, the outlet is provided with a switch to open or close the drainpipe, and the side wall of the drainpipe is provided with multiple Connecting pipes, multiple connecting pipes are arranged in parallel, each connecting pipe is a straight pipe, multiple connecting pipes are connected to multiple heat exchange tubes one by one, and the horizontal height of the end of each connecting pipe connected to the heat exchange tube is different The level below the end of the connecting pipe connected to the drainpipe. According to the heat exchanger of the present invention, when the cooling working medium needs to be discharged, the cooling working medium in the heat exchange tube of the heat exchanger can be completely emptied, thereby preventing the heat exchange tube from freezing.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to a heat exchanger and a refrigeration system having the same. Background technique [0002] The operating conditions of the natural cooling air-cooled chiller are wide. When the ambient temperature is extremely low, or when the natural cooling air-cooled chiller needs to be overhauled, it is necessary to drain the cooling medium in the natural cooling condenser to avoid natural cooling. The heat exchange tubes in the cooling condenser freeze. [0003] In the prior art, the heat exchange tube of the natural cooling condenser is connected to the drain pipe through a connecting pipe, and the cooling working fluid is discharged through the bottom of the drain pipe under the action of gravity, but especially when the natural cooling condenser is installed obliquely, due to The connecting pipe is an L-shaped pipe, and the cooling medium in the connecting pipe is guided into the h...

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Problems solved by technology

[0003] In the prior art, the heat exchange tube of the natural cooling condenser is connected to the drain pipe through a connecting pipe, and the cooling medium is discharged through the bottom of the drain pipe under the action of gravity. However, especially when the natural cooling condenser is installed obliquely, due to The connecting pipe is an L-shaped pipe, and the cooling medium in the connecting pipe is guided into the heat exchange tube, so that the cooling medium in the heat exchange pipe of some natural cooling condensers cannot flow into the drain pipe through the connecting pipe, so that the working fluid in the environment temperature is particularly low Under normal circumstances, the heat exchange tube of the natural cooling condenser is very easy to freeze, thus affecting the re-use of the natural cooling condenser

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