Water chilling unit

Abstract

The invention belongs to the technical field of water chilling units, and aims to solve the problem that a falling film evaporator adopted by an existing water chilling unit cannot remarkably reduce the refrigerant filling amount. For this aim, the provided water chilling unit comprises an evaporator, a condenser, a compressor, a subcooler and a superheater, and the condenser, the subcooler, the evaporator, the superheater and the compressor form a closed refrigerant circulation loop, the water chilling unit further comprises a first cooling water inlet pipe, a second cooling water inlet pipe, a first cooling water connecting pipe and a second cooling water connecting pipe, the first cooling water inlet pipe is connected with the condenser and the subcooler, the first cooling water connecting pipe is connected between the subcooler and the condenser, the second cooling water inlet pipe is connected with the evaporator and the superheater, and the second cooling water connecting pipe is connected between the superheater and the evaporator. According to the water chilling unit, the refrigerant filling amount of the water chilling unit can be greatly reduced, and greenhouse gas emission is remarkably reduced.

Description

technical field [0001] The invention belongs to the technical field of chillers, and specifically provides a chiller. Background technique [0002] Chillers include air-cooled chillers and water-cooled chillers. In water-cooled chillers, refrigerants such as R134a (a gas with a high greenhouse effect) are widely used. Whether it is a water-cooled screw unit or a water-cooled maglev unit, it needs A large amount of refrigerant charge can ensure the normal operation of the system. Usually, the charge amount of refrigerant is 200kg to 1000kg. In the water-cooled screw unit and water-cooled maglev unit, about 90% of the refrigerant is distributed in the evaporator and condenser. By reducing the refrigerant charge in the system, greenhouse gas emissions can be significantly reduced. [0003] In the prior art, the way to reduce the refrigerant charge is to convert the traditional flooded evaporator into a falling film evaporator. This method can reduce the refrigerant charge of t...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned problems in the prior art, that is, in order to solve the problem that the existing chiller adopts the falling film evaporator and cannot significantly reduce the refrigerant charge, the present invention provides a chiller, which includes an evaporator, a condensing The condenser, compressor, subcooler and superheater, the condenser, subcooler, evaporator, superheater and compressor form a closed-loop refrigerant circulation circuit, and the chiller also includes the first cooling water inlet pipe and the second cooling water inlet pipe. water pipe, the first cooling water connecting pipe and the second cooling water connecting pipe, the first cooling water inlet pipe is respectively connected to the condenser and the subcooler, the first cooling water connecting pipe is connected between the subcooler and the condenser, and the second The second cooling water inlet pipe is connected to the evaporator and the superheater respectively, and the second cooling water connection pipe is connected between the superheater and the evaporator

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