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Flooded evaporator oil return system and water-cooled air conditioning unit adopting flooded evaporator oil return system

A flooded evaporator and oil return system technology, which is applied to evaporators/condensers, refrigerators, refrigeration components, etc., can solve the problems of compressor work impact and low oil return efficiency, increase device costs, improve The effect of efficiency and simple structure

Pending Publication Date: 2017-02-22
GREE ELECTRIC APPLIANCES INC
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to propose an oil return system for a flooded evaporator, which can solve the problems of low oil return efficiency and possible influence on the operation of the compressor in the existing oil return method

Method used

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  • Flooded evaporator oil return system and water-cooled air conditioning unit adopting flooded evaporator oil return system
  • Flooded evaporator oil return system and water-cooled air conditioning unit adopting flooded evaporator oil return system

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Embodiment Construction

[0030] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0031] Such as figure 2 As shown, this embodiment provides a flooded evaporator oil return system, which includes oil and refrigerant mixture recovery pipeline 1, separated oil recovery pipeline 2 and oil and refrigerant separator 3, wherein the oil and refrigerant mixture The inlet end of the recovery pipeline 1 communicates with the oil return port 41 of the flooded evaporator 4 , and its outlet end communicates with the oil and refrigerant separator 3 for draining the oil and refrigerant mixture in the flooded evaporator 4 to the oil and refrigerant separator 3. The oil-refrigerant separator 3 is arranged in the flooded evaporator 4, and uses the heat of the chilled water to separate the oil and the refrigerant. The separated oil recovery pipeline 2 communicates with the bottom of the oil-refr...

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Abstract

The invention relates to the technical field of air conditioning equipment, in particular to a flooded evaporator oil return system and a water-cooled air conditioning unit adopting the flooded evaporator oil return system. The flooded evaporator oil return system comprises an oil and refrigerant mixed liquid recovery pipeline, a separated oil recovery pipeline and an oil and refrigerant separator; an inlet end of the oil and refrigerant mixed liquid recovery pipeline communicates with an oil return port of a flooded evaporator, an outlet end of the oil and refrigerant mixed liquid recovery pipeline communicates with the oil and refrigerant separator, and oil and refrigerant mixed liquid in the flooded evaporator is drained to the oil and refrigerant separator; the oil and refrigerant separator is arranged in the flooded evaporator and carries out separation of oil and a refrigerant by employing heat of chilled water; and the separated oil recovery pipeline communicates with the bottom of the oil and refrigerant separator, and drains separated oil to an oil tank or an air inlet of a compressor. With the adoption of the oil return mode, the oil return efficiency of the flooded evaporator is improved, a utilization ratio of the liquid-state refrigerant of the flooded evaporator is increased, and long-time oil return can be realized due to the fact that the oil and refrigerant mixed liquid dose not enter the compressor or the oil tank.

Description

technical field [0001] The invention relates to the technical field of air-conditioning equipment, in particular to an oil return system for a flooded evaporator and a water-cooled air-conditioning unit using the same. Background technique [0002] Due to the leakage of bearing lubricating oil in large-scale chillers, the refrigerant is impure and the oil in the fuel tank is insufficient. At present, the common oil return methods of flooded evaporators are as follows: figure 1 As shown, it includes an injection pump 11', the input end of the injection pump 11' communicates with the oil return port 41', the output end communicates with the oil tank or the suction port of the compressor, and the power end communicates with the high-pressure gas or liquid refrigerant output end. communicated, and a solenoid valve 12' is set on the connecting pipeline with the power end. Its working principle is: because the density of the oil is lower than that of the liquid refrigerant, in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B39/02F25B31/00F25B43/02
CPCF25B31/004F25B39/02F25B43/02F25B2339/02F25B2400/23
Inventor 尹威华周堂张治平李宏波周宇刘魏张永斌
Owner GREE ELECTRIC APPLIANCES INC
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