Enthalpy increasing cold and hot full energy efficiency recovery heat pump

Abstract

The invention relates to the technical field of heat pumps, in particular to an enthalpy increasing cold and hot full energy efficiency recovery heat pump which comprises a compressor, an outdoor heatexchanger, a heat recovery exchanger, an economizer, a first expansion valve and a second expansion valve, wherein the outdoor heat exchanger is arranged outdoors and communicates with an exhaust port of the compressor; the heat recovery exchanger communicates with the exhaust port of the compressor; the economizer communicates with the heat recovery exchanger o the outdoor heat exchanger; the first expansion valve and the second expansion valve separately communicate with a main path of the economizer; the second expansion valve communicates with an auxiliary path of the economizer in the reverse direction; and the auxiliary path of the economizer communicates with an air supply port of the compressor to perform air supply for enthalpy increasing on the compressor. The cold and hot fullenergy efficiency recovery heat pump can meet refrigeration requirements on refrigeration devices, can also meet the heating requirements on heating devices under the condition of not being influencedby seasons, and can effectively improve the refrigeration and heating full energy efficiency of the device by adopting a way of supply air for increasing enthalpy..

Description

technical field [0001] The invention relates to the technical field of heat pumps, in particular to an enthalpy-increasing cold-heat full energy-efficiency recovery heat pump. Background technique [0002] In recent years, some air source heat pumps have appeared on the market, which mainly use the finned radiators from the outside to make the refrigerant exchange heat with the outdoor air and evaporate, and then be sucked into the compressor through the four-way reversing valve. After compression, the high-temperature, high-pressure The gaseous refrigerant enters the indoor water source heat recovery heat exchanger (that is, the refrigerant heat exchanger) through the four-way reversing valve. The refrigerant gas releases heat in the water source heat recovery heat exchanger and condenses into a high-pressure liquid refrigerant, while the liquid refrigerant gas The refrigerant goes through the throttling mechanism of the indoor unit to reduce pressure and throttling, enter ...

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Problems solved by technology

[0003] However, the existing air source heat pumps usually have the following defects: 1. It is greatly affected by the season, and the equipment cannot recover cooling capacity in winter. In the environment below minus 10 degrees, the energy efficiency ratio of the equipment is low, and when the outdoor ambient temperature is lower, Insufficient air return from the compressor causes the equipment to be paralyzed and unable to operate; 2. After the temperature at the heat recovery end reaches above 50 degrees, the refrigerant gas cannot be completely condensed into a liquid state in the water source heat recovery heat exchanger, resulting in poor cooling capacity of the equipment, resulting in High operating pressure, prone to failure; 3. Low degree of automation, because during the operation of the system, the two recycling ends of the cold and hot are often out of balance, so special personnel are required to operate; There are many installation accessories, high requirements for heat exchangers, large volume, unreasonable design, and generally large volume; 5. The scope of use is small, and the cold recovery end can only produce chilled water at about 7 degrees for air conditioning, and cannot produce Lower temperatures are used to freeze seafood, meat and other products

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