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Improved two-stage ejection type refrigerating system

A refrigeration system, two-stage injection technology, applied in the direction of refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of limited improvement of ejector operating conditions, complex systems, etc., to achieve saving of working gas volume, compact space layout, Effect of improving system reliability

Active Publication Date: 2015-03-11
SHANDONG UNIV
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Problems solved by technology

But the use of economizer or subcooler still complicates the system
And its two-stage injectors are all gas injectors, which have little influence on the injection ratio and have limited improvement on the operating conditions of the injectors

Method used

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  • Improved two-stage ejection type refrigerating system

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Embodiment Construction

[0017] The present invention is described in detail below in conjunction with accompanying drawing:

[0018] Such as figure 1 As shown, the present invention aims to solve the problems of low injection ratio, low energy efficiency, and high temperature of the secondary flow inlet in the middle of the ejector existing in the existing two-stage ejector refrigeration system, so as to improve the injection ratio and system energy efficiency.

[0019] An improved two-stage jet refrigeration system, including a condenser 4, the output end of the condenser 4 is divided into three circuits, one path is connected with the throttle valve 6, the other path is connected with the pump 9, and the third path is connected with the throttle valve 8, The evaporator 7 is connected to the injector 2, and the output of the generator 1 is divided into two paths, one path is connected to the injector 2, and the other path is connected to the injector 3, and the injector 2 and the throttle valve 6 ar...

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Abstract

The invention discloses an improved two-stage ejection type refrigerating system. The system comprises a condenser, wherein an output end of the condenser is divided into three ways, one way is connected with a first throttling valve, another way is connected with a pump, and the third way is sequentially connected with a second throttling valve, an evaporator and a first ejector; the output of a generator is divided into two ways, one way is connected with the first ejector, the other way is connected with a second ejector, and both the first ejector and the first throttling valve are connected with the second ejector. The system has the energy-saving effect, the required working gas volume from the generator is effectively decreased, the ejection rate is increased, the energy efficiency can be increased by about 10%, and the system is simple in structure, low in manufacturing cost and compact in structure.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to an improved two-stage jet refrigeration system. Background technique [0002] Ejection refrigeration is a refrigeration technology driven by thermal energy, which can make full use of industrial waste heat, solar heat and other low-grade heat sources. It consumes little mechanical energy, has simple equipment, reliable operation and low cost. Its working medium can be carbon dioxide, water, hydrocarbons and other green and environment-friendly natural substances. [0003] However, its disadvantages are that the ejector has a small compression ratio and high cooling temperature; and its operation is affected by back pressure, the injection ratio is small, and the system energy efficiency is not high. [0004] Patent Application No. 201210116545.X proposes "a self-cascading ejector refrigerator", which uses a mixed working fluid and two ejectors to achieve a larger pressure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B19/04F25B49/00
CPCF25B9/08F25B49/02
Inventor 赵红霞王雷韩吉田
Owner SHANDONG UNIV
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