A transcritical carbon dioxide heat pump refrigeration system

Abstract

The invention discloses a transcritical carbon dioxide heat pump refrigeration system. The exhaust ports of the first and second compressors are both connected to the first opening of the first electric tee, and the second opening of the first electric tee is exchanged by refrigerant-water. The heater is connected to the one-way valve combination; the third opening of the first electric tee is connected to the first opening of the refrigerant-air heat exchanger; the suction port of the second compressor is connected to the gas-phase refrigerant outlet of the flash tank; the first The suction port of the compressor is connected to the gas outlet of the gas-liquid separator; the inlet of the gas-liquid separator is connected to the first opening of the second electric tee, and the second opening of the second electric tee is connected to the refrigerant-air heat exchanger The first opening and the third opening of the second electric tee are connected to the refrigerant-water heat exchanger; the two-phase refrigerant inlet of the flash tank and the liquid-phase refrigerant outlet of the flash tank are both connected to the one-way valve combination. After a set of this equipment is attached to the building, the triple energy-saving system of cooling in summer, heating in winter, and domestic hot water throughout the year can be realized.

Description

technical field [0001] The invention belongs to the technical field of heating, ventilation, refrigeration and heat pump, and relates to a transcritical CO 2 Cooling System. Background technique [0002] In recent years, as people pay more and more attention to environmental issues, the use of environmentally friendly refrigerants has increasingly become the focus of the government and various research institutions. Among them, the use of natural working fluids as refrigerants is the most important part. CO 2 It has good environmental protection performance and will not cause any adverse effects on the environment as a refrigerant. CO 2 It is an inert gas, non-toxic and non-irritating; it has good safety and chemical stability, is safe, non-toxic, non-flammable, and does not decompose to produce harmful gases even at high temperatures; its global warming potential index GWP is 1, CO 2 It does not require industrial synthesis, it only needs to be extracted in the atmosphe...

AI Technical Summary

Problems solved by technology

The reason why transcritical CO has not yet been seen 2 The heat pump and refrigeration dual-system switching system is entirely due to CO 2 The normal operating pressure of the working fluid is too high, and there is no four-way reversing valve on the market that can be manufactured for such an ultra-high pressure.

Images