Capacity adjustable vortex compressor refrigeration system with main return loop installed with ejector

A technology for scroll compressors and refrigeration systems, which is applied in the direction of irreversible cycle compressors, compressors, refrigerators, etc., and can solve the problems of high refrigerant pressure and temperature, limited refrigerant leakage, and large resistance coefficient of the discharge outlet, etc. problem, to achieve the effect of simplifying design and control, improving adaptability and reducing irreversible loss

Inactive Publication Date: 2009-07-01
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the actual system, the size of the refrigerant discharge port is limited by the wall thickness of the scroll body (too large discharge port will cause refrigerant leakage between different compression chambers, reducing the efficiency of the compressor), and the discharge port has a large drag coefficient
Therefore, the refrigerant leakage of the passive refrigerant leakage system that relies on the pressure difference between the compression chamber and the low-pressure side to achieve refrigerant leakage is very limited, and the pressure and temperature of the refrigerant that is finally unloaded are relatively high

Method used

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  • Capacity adjustable vortex compressor refrigeration system with main return loop installed with ejector
  • Capacity adjustable vortex compressor refrigeration system with main return loop installed with ejector
  • Capacity adjustable vortex compressor refrigeration system with main return loop installed with ejector

Examples

Experimental program
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Effect test

Embodiment 1

[0028] figure 1 Schematic diagram of the structure of a scroll compressor refrigeration system using an ejector to enhance the refrigerant release function. The system includes a refrigerant primary circuit 100 and a refrigerant escape system. The main refrigerant circuit 100 is formed by sequentially connecting a scroll compressor 101 with a refrigerant injection hole 105 , a condenser 102 and an evaporator 104 . The refrigerant leakage system includes an ejector 312 and a refrigerant leakage circuit 300, wherein the ejector 312 is arranged on the pipeline between the condenser 102 and the evaporator 104 on the main refrigerant circuit 100 of the system, and the refrigerant leakage circuit 300 One end is connected to the refrigerant injection hole 105 of the scroll compressor 101 , and the other end is connected to the injection port of the injector 312 through the discharge one-way valve 301 and the discharge regulating valve 302 in sequence. The discharge one-way valve 30...

Embodiment 2

[0032] figure 2 Another structural schematic diagram of a scroll compressor refrigeration system using an ejector to enhance the refrigerant leakage function. Compared figure 1 It can be found that the system only adds a system expansion device 103 on the pipeline between the condenser 102 and the ejector 312 in the system main circuit 100, thereby increasing the adjustability of the system. In actual operation, the expansion device 103 of the system is only used to control the superheat degree at the outlet of the evaporator 104, and the ejector 312 is only used to adjust the amount of refrigerant leakage, so that the adjustment effect of the system is guaranteed. In addition, when the injector 312 is a non-adjustable structure, the setting of the system expansion device 103 can also ensure the normal operation of the system. A system expansion device (103) is arranged on the pipeline of the inlet of the ejector (312) on the main refrigerant circuit (100) of the system.

Embodiment 3

[0034] image 3 A structural schematic diagram of a scroll compressor refrigeration system using ejectors and intermediate heat exchangers for refrigerant discharge and injection. The system includes three parts: a refrigerant main circuit 100, a refrigerant injection system and a refrigerant discharge system. The main refrigerant circuit 100 of the system is composed of a scroll compressor 101 with a refrigerant injection hole 105 , a condenser 102 and an evaporator 104 connected in sequence. The refrigerant leakage system includes an ejector 312 and a refrigerant leakage circuit 300, wherein the ejector 312 is arranged on the pipeline between the condenser 102 and the evaporator 104 on the main refrigerant circuit 100 of the system, and the refrigerant leakage circuit 300 One end is connected to the refrigerant injection hole 105 of the scroll compressor 101, and the other end is connected to the injection port of the ejector 312 through the injection / discharge switching de...

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Abstract

The utility model relates to a capacity-adjustable scroll compressor refrigeration system provided with an ejector on a main circuit, belonging to the field of refrigeration and air conditioning. In this technology, an ejector is installed between the condenser and the evaporator in the system circuit, and the high and low pressure difference of the system is used to strengthen the refrigerant leakage function of the scroll compressor refrigeration system from the middle stage of compression to the low pressure side, and improve the unloading of the scroll compressor ability. At the same time, the combination of enhanced refrigerant leakage technology and refrigerant injection technology greatly improves the variable capacity of the scroll compressor refrigeration system in both directions. This technology can be used in refrigeration / heat pump systems with scroll compressors in the field of air conditioning and refrigeration. It can effectively change the efficiency, system capacity and performance of the compressors, so that the system can work efficiently in a wide range of working conditions, thereby improving the system capacity. Applicability under varying operating conditions.

Description

technical field [0001] The invention relates to a refrigeration system with a scroll compressor, which belongs to the field of refrigeration and air conditioning. More specifically, it relates to a system form and control method for changing the capacity and performance of a refrigeration system containing a scroll compressor through refrigerant leakage or / and injection. Background technique [0002] A scroll compressor is a type of compressor used in refrigeration and air conditioning. Due to the advantages of high efficiency and low noise, scroll compressors are widely used in small and medium capacity refrigeration and air conditioning systems. The scroll compressor has a pair of symmetrically arranged scroll disks (stationary disk and moving disk), the static disk is fixed on the body of the compressor, and the moving disk performs circular translation around the static disk within a certain range. At the initial stage of compression, the low-pressure refrigerant gas i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B1/04F25B9/08F25B41/00
CPCF25B1/04F25B2341/0011
Inventor 王宝龙石文星李先庭韩林俊
Owner TSINGHUA UNIV
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