Method for cooperatively cooling high-pressure ratio refrigeration compressor by diverted gas and liquid jointly entering gas supplementing port

A technology of refrigeration compressors and air supply ports, which is applied in the directions of refrigerators, compressors, refrigeration and liquefaction, etc., can solve the problem of not being able to reduce the exhaust temperature of the compressor to the allowable value, and achieve the effect of improving intelligent operation.

Inactive Publication Date: 2020-04-17
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that when the pressure ratio is too high, the discharge temperature of the compressor cannot be lowered to the allowable value only by supplementing air

Method used

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  • Method for cooperatively cooling high-pressure ratio refrigeration compressor by diverted gas and liquid jointly entering gas supplementing port
  • Method for cooperatively cooling high-pressure ratio refrigeration compressor by diverted gas and liquid jointly entering gas supplementing port

Examples

Experimental program
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Effect test

Embodiment 1

[0014] For the improvement of the throttling system before the flasher, a temperature sensor (2) is provided at the discharge port of the compressor (1), and the discharge port of the compressor (1) is then connected to the condenser (3), and the condenser (3) passes through The primary throttling element (5) is connected to the flasher (6), the gas from the flasher (6) is directly connected to the gas supply port of the compressor (1), and the liquid from the flasher (6) passes through the secondary The throttling element (7) and the evaporator (8) are connected to the air inlet of the compressor (1); at the same time, there is a drainage channel behind the condenser (3) and the flow of liquid refrigerant is controlled by the flow regulating valve (4) It is directly mixed with the gas coming out of the flasher (6) and then together with the gas supply port of the compressor (1).

[0015] When the heat pump / refrigeration cycle system is working at a high pressure ratio, the te...

Embodiment 2

[0018] For the improvement of the subcooler system, a temperature sensor (2) is provided at the discharge port of the compressor (1), and the discharge port of the compressor (1) is then connected to the condenser (3). One inlet of the cooler (9) is connected, and the other branch after the condenser (3) is connected to the other inlet of the subcooler (9) through a primary throttling element (5), and the gas from the subcooler (9) is directly connected to the The air supply port of the compressor (1) is connected, and the liquid from the subcooler (9) is connected to the air inlet of the compressor (1) through the secondary throttling element (7) and the evaporator (8); at the same time, the subcooler The liquid coming out of (9) also has another branch flow, which is drained by the drainage channel and controlled by the flow regulating valve (4). The flow of the refrigerant liquid is directly mixed with the gas coming out of the subcooler (9), and then enters the compressor (...

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Abstract

The invention discloses a method for cooperatively cooling a high-pressure ratio refrigeration compressor by diverted gas and liquid jointly entering a gas supplementing port, and belongs to the fieldof refrigeration and low-temperature engineering. The method is characterized in that an original economizer system is improved, which means a temperature sensor, a flow regulating valve and a drainage pipeline are additionally arranged, wherein the temperature sensor detects the discharge temperature of the compressor in real time, the injected amount of refrigerant liquid is controlled by adjusting the opening degree of the flow regulating valve, and the injected refrigerant liquid enters the compressor through the gas supplementing port after being mixed with gas in a gas supplementing pipeline, so that the the compressor is prevented form being additionally provided with a liquid supplementing port; and the compressor is supplemented with the gas and the liquid, so that the dischargetemperature can be effectively reduced, and in the case of high pressure ratio, a heat pump/ a refrigeration circulation system can still achieve stable and efficient operation. According to the method, the problem that in the case of high pressure ratio, the discharge temperature of the compressor is too high can be solved.

Description

technical field [0001] The invention relates to a high-pressure-ratio refrigeration compressor splitting gas-liquid co-feeding and supplementing gas ports for coordinated cooling, which belongs to the field of refrigeration and low-temperature engineering. Background technique [0002] When the heat pump / refrigeration cycle system works in a low temperature environment, it will cause the problems of COP attenuation and excessive exhaust temperature. Excessive discharge temperature will reduce the volumetric efficiency of the compressor and increase power consumption, and will also lead to failure of lubricating oil, affecting the service life of the compressor. In order to solve the problem of COP attenuation, an economizer system is often used, that is, during the compression process of the compressor, air is supplemented through the second suction port to reduce the discharge temperature and improve the cycle performance. There are two main types of economizer systems: th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B1/00F25B40/02F25B41/04F25B49/02F25B41/20
CPCF25B1/00F25B40/02F25B49/02F25B41/40F25B41/20
Inventor 雷标余海彬温强宇吴玉庭智瑞平马重芳
Owner BEIJING UNIV OF TECH
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