Refrigerating system adopting pressurizing tank to keep pressure of liquid refrigerant in front of thermostatic expansion valve constant

Abstract

The invention discloses a refrigerating system adopting a pressurizing tank to keep pressure of a liquid refrigerant in front of a thermostatic expansion valve constant. According to the refrigerating system, the pressurizing tank is arranged in front of the expansion valve, high-temperature and high-pressure gas exhausted by a compressor enters a coiler of the pressurizing tank to exchange heat with low-temperature and low-pressure liquid in the pressurizing tank, the low-temperature and low-pressure liquid absorbs heat so that the temperature of the low-temperature and low-pressure liquid can be increased, part of the liquid absorbs heat and is gasified, the pressure in the pressurizing tank is increased, and the liquid in the pressurizing tank is supplied to an evaporator under pushing of the high-pressure gas. The refrigerating system can generate a very good energy saving effect for areas with the large environment temperature change in four seasons and at day and night or the areas with the low environment temperature all year round.

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...

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

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