Dual-source integrated air source heat pump unit with full heat recovery

Abstract

The invention relates to the technical field of heat pump machinery, in particular to a dual-source integrated air source heat pump unit with full heat recovery. The high-pressure outlet of the compressor of the heat pump unit is connected to the port d of the four-way reversing valve, the port c is connected to the composite water-cooled condenser, the port e is connected to the fin heat exchanger, and the port s is connected to the inlet of the gas-liquid separator. The outlet of the compound water-cooled condenser is connected to the shell-and-tube heat exchanger and the liquid-side port of the fin-type heat exchanger through pipelines and valves, and the gas-side port of the shell-and-tube heat exchanger is connected to the valve and compressor inlet through pipelines; The outlet of the gas-liquid separator is connected to the suction port of the compressor through a pipeline. The invention can realize free switching of operation modes such as cooling, heating, cooling plus full heat recovery, and hot water, and solve the year-round demand for cooling, heating, and hot water in building construction or industrial projects, thereby realizing multiple functions of one machine, Effective cost savings.

Description

technical field [0001] The invention relates to the technical field of heat pump machinery, in particular to a dual-source integrated air source heat pump unit with full heat recovery. Background technique [0002] Conventional central air-conditioning host generally adopts the following two methods: [0003] 1) Water-cooled chiller [0004] When cooling, the water-cooled chiller unit provides 7°C chilled water to the air-conditioning terminal such as the fan coil to cool the air in the room. The water-cooled condenser transfers the condensation heat of the high-temperature and high-pressure refrigerant to the cooling water, and the cooling water is sent to Cooling towers reject heat to the outside atmosphere. Usually, the water-cooled chiller is placed indoors, and the cooling tower is placed outdoors. There is a long cooling water circulation pipeline between the two, which requires a high-power and high-lift cooling water pump to drive the cooling water circulation; and...

AI Technical Summary

Problems solved by technology

[0010] In order to overcome the fact that the existing heat pump air conditioners cannot have the functions of cooling in summer, heating in winter, and process / sanitary hot water preparation, the dual-source integrated air source heat pump unit with full heat recovery of the present invention optimizes the circulation process of the refrigeration system, Refrigeration adopts water cooling, the condensing temperature can be reduced by about 14°C compared with the air-cooled heat pump, which can significantly improve the cooling capacity and cooling energy efficiency of the unit, and the low-pressure gas from the shell-and-tube heat exchanger (4) directly enters the suction port of the compressor, It can effectively overcome the need for conventional air-cooled heat pump units to flow through the four-way valve, the gas-liquid separator, and then enter the suction port of the compressor, causing excessive pressure drop of low-pressure suction side components and pipelines, resulting in attenuation of cooling capacity and cooling energy efficiency of the unit The air source heat pump is used for heating in winter, and it has the function of heat recovery to provide process or sanitary hot water throughout the year

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