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Refrigeration system using pressurized tank with constant pressure of liquid refrigerant before thermal expansion valve

A technology of thermal expansion valve and liquid refrigerant, which is applied in the direction of machines that use waste heat, refrigerators, refrigeration components, etc. It can solve the problems of raising the condensation temperature and the refrigeration device cannot fully utilize the ambient temperature efficiency, so as to eliminate pressure loss, Improve cooling efficiency and reduce power consumption

Active Publication Date: 2018-06-22
TIANJIN UNIV OF COMMERCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method raises the condensation temperature mostly around 20°C, resulting in the refrigeration device not being able to take full advantage of the lower ambient temperature to improve efficiency

Method used

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  • Refrigeration system using pressurized tank with constant pressure of liquid refrigerant before thermal expansion valve

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with the accompanying drawings.

[0012] A refrigeration system using a pressurized tank to keep the pressure of the liquid refrigerant before the thermal expansion valve, when the ambient temperature is lower than 25°C, the shut-off valve 6 is closed, and a pressurized tank is used to increase the pressure of the refrigerant in front of the thermal expansion valve; when the ambient temperature rises When the temperature reaches 25°C, the shut-off valve (6) is opened, and the refrigeration system operates normally.

[0013] The refrigeration system using a pressurized tank to keep the pressure of the liquid refrigerant in front of the thermal expansion valve, in order to ensure the continuous liquid supply of the refrigeration system, two pressurized tanks are used: pressurized tank A and pressurized tank B, the working status of the two is different, one to The evaporator feeds the liquid, and the oth...

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PUM

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Abstract

The invention discloses a refrigerating system using a pressurized tank to keep the pressure of the liquid refrigerant before the thermal expansion valve constant. The refrigeration system installs a pressurized tank before the expansion valve. The high-temperature and high-pressure gas discharged from the compressor enters the pressurized tank coil to exchange heat with the low-temperature and low-pressure liquid in the pressurized tank. The temperature of the low-temperature and low-pressure liquid absorbs heat, and part of the liquid absorbs heat Thermal gasification, the pressure in the pressurized tank increases, and the liquid in the pressurized tank is supplied to the evaporator under the pressure of high-pressure gas. The present invention will produce very good energy-saving effects for areas with large changes in ambient temperature in four seasons, day and night, or low ambient temperature throughout the year.

Description

technical field [0001] The invention relates to a refrigeration system with constant pressure of liquid refrigerant in front of a thermal expansion valve, in particular to a refrigeration system using a pressurized tank to constant pressure of liquid refrigerant in front of a thermal expansion valve. Background technique [0002] In the traditional direct expansion refrigeration system, it is necessary to set the minimum condensing temperature (or pressure) to ensure that there is a sufficient pressure difference before and after the expansion valve, so as to ensure a stable and sufficient liquid supply from the expansion valve to the evaporator. When the ambient temperature decreases, the condensing temperature decreases. When it is lower than the allowable minimum condensing temperature, the pressure difference before and after the expansion valve is not enough to overcome the pressure drop of the expansion valve, resulting in insufficient liquid supply to the evaporator, o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B41/04F25B41/06F25B49/02F25B27/02F25B41/20F25B41/31
CPCF25B27/02F25B49/02F25B41/31F25B41/20Y02A30/274
Inventor 臧润清张秋玉孙志利
Owner TIANJIN UNIV OF COMMERCE
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