Liquid impact preventing system and method

A technology of liquid hammer and suction superheat, applied in refrigeration and liquefaction, lighting and heating equipment, compressors, etc., can solve problems such as reducing the utilization efficiency of lubricating oil, reduce the filling amount, improve the utilization efficiency, and ensure normal operation. Oil return effect

Active Publication Date: 2019-02-22
GREE ELECTRIC APPLIANCES INC
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  • Claims
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Problems solved by technology

[0004] In order to solve the problem of reducing the utilization efficiency of lubricating oil when the gas-liquid separator is used to avoid the phenomenon of liquid shock in the related art, the embodiment of the present invention provides a system and method for preventing liquid shock

Method used

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  • Liquid impact preventing system and method

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Embodiment Construction

[0038] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention.

[0039] In the following description, use of suffixes such as 'module', 'part' or 'unit' for denoting elements is only for facilitating description of the present invention, and has no specific meaning by itself. Therefore, 'module', 'part' or 'unit' may be used in combination.

[0040] In order to solve the problem that the utilization efficiency of lubricating oil will be reduced when the gas-liquid separator is used to avoid the liquid hammer phenomenon in the related art, figure 1 , image 3 Both show a structural block diagram of a system for preventing liquid hammer according to an embodiment of the present invention.

[0041] like figure 1 As shown, the syste...

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Abstract

The invention discloses a liquid impact preventing system and method. The liquid impact preventing system comprises a bypass pipeline, an adjustable switch and an electronic expansion valve, wherein the bypass pipeline is connected with an exhaust gas pipeline and a suction gas pipeline of a compressor and is provided with the adjustable switch and the electronic expansion valve; the bypass pipeline is used for extracting exhaust gas of the compressor so that the exhaust gas can sequentially pass through the adjustable switch and the electronic expansion valve to be mixed with suction gas of the compressor, the superheat degree of the suction gas is controlled to meet a preset condition, and liquid impact is prevented; the adjustable switch is used for adjusting the suction volume of the exhaust gas in the bypass pipeline; and the electronic expansion valve is used for carrying out cooling and pressure reducing treatment on the exhaust gas. In this way, the situation that the suction gas of the compressor contains liquid can be avoided, it does not need to arrange a gas-liquid separator, return oil can directly flow into the compressor, and therefore the normal oil returning of thesystem is guaranteed while the liquid impact phenomenon is avoided. The utilization efficiency of lubricating oil is improved, the charge volume of lubricating oil is reduced, and energy sources aresaved.

Description

technical field [0001] The invention relates to the field of units, in particular to a system and method for preventing liquid hammer. Background technique [0002] At present, in water chillers, in order to prevent the compressor from absorbing liquid, a gas-liquid separator is installed in front of the suction port of the compressor to separate the gas-liquid two-phase refrigerant, so that the refrigerant entering the compressor contains only a small amount. Liquid refrigerant and a small amount of lubricating oil to avoid liquid hammer in the compressor. In addition, an oil return hole is provided at the bottom of the suction pipe of the gas-liquid separator to realize that the lubricating oil enters the compressor along with the refrigerant. But even if there is an oil return hole, a part of lubricating oil will still be stored at the bottom of the gas-liquid separator, which will increase the filling amount of lubricating oil in the refrigeration system, resulting in e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B31/00F25B41/06F25B41/20
CPCF25B31/004F25B2400/0401F25B41/31Y02B30/70
Inventor 王传华贺秋温祖恒魏峰
Owner GREE ELECTRIC APPLIANCES INC
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