Domestic air source heat pump heating system

Abstract

The invention discloses a household air source heat pump heating system in cold area, and relates to a heat pump system which uses the air source for running steadily under the low-temperature environment and supplying the interior with the needed heat and healthy hot water. The system comprises parts such as a low pressure frequency compressor, a high pressure compressor, an outdoor heat exchanger, a flash evaporator, a reservoir, a defrosting coil, a flash gas overheating coil, a compressor heat radiating recovery coil, a low pressure air supply pressurization line, a sub-thermal converter, a multi-head efficient spiral heat exchanger, a thermal expansion valve, and the like, which are connected by a pipeline. The invention is characterized in that the system comprises a flash evaporator component, a flash gas overheating coil, a compressor heat radiating recovery coil, and a low pressure air supply pressurization line. When in heat operation under low-temperature working condition, based on the two-stage compression cycle which is incompletely cooled between two stages of throttles, the invention uses the flash gas overheating coil, the compressor heat radiating recovery coil, and the low pressure air supply pressurization line for recovering the heat radiating capacity of a compressor, realizes the overheating of the flash gaseous working substance, enhances the gas transmission capacity of the compressor, and further improves the heat and the energy efficiency ratio of a heat pump system. Meanwhile, the defrosting coil is added to the bottom part of the heat exchanger device, so the frosting problem of the outdoor heat exchanger of the heat pump is solved. The invention can realize the mutual switch among a single heating operating mode in winter, a heating and healthy hot water united operating mode in winter, and a healthy hot water single operating mode during a non-heating period.

Description

technical field [0001] The invention discloses a household air source heat pump heating system in a cold area, and relates to a heat pump system which utilizes an air source to operate stably in a low temperature environment and provides required heat and sanitary hot water to a room. Background technique [0002] At present, the heating form of urban residents in my country is mainly urban central heating, and there are also local heating in urban communities and individuals using small coal, oil, and gas boilers for winter heating. The heat source for heating is mainly provided by boilers burning fossil fuels. Because the thermal efficiency of the boiler is not high, the high-level heat energy is directly used for heating, which wastes a lot of energy and causes environmental pollution. At the same time, the traditional heating system requires household billing and household renovation, which involves a large amount of engineering and high cost, and there are still phenom...

AI Technical Summary

Problems solved by technology

Use the flash gas superheating coil to superheat the gaseous working medium in the flash evaporator, and solve the problem that the overheating of the thermal expansion valve affects the flow rate of the working medium

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