A direct heating type multi-phase transition point compound heat storage heat pump water heater system

Abstract

The invention discloses a direct heat type multi-phase transformation point composite heat storage heat-pump water heater system which comprises a multi-phase transformation point heat storage heat exchanger, an expansion valve, an evaporator and a compressor. The multi-phase transformation point heat storage heat exchanger comprises a cold water circulation heat exchange pipeline and a refrigerant circulation heat exchange pipe, wherein the cold water circulation heat exchange pipeline and the refrigerant circulation heat exchange pipe are coated with phase change heat storage materials; the cold water circulation heat exchange pipeline comprises a cold water inlet and a cold water outlet; the refrigerant circulation heat exchange pipe comprises a refrigerant outlet and a refrigerant inlet; the refrigerant outlet is sequentially connected with the expansion valve, the evaporator, the compressor and the refrigerant inlet through a pipeline. The heat storage materials with different phase transformation points, the cold water circulation heat exchange pipeline and the refrigerant (freezing medium) circulation heat exchange pipe are innovatively adopted for the system to form the multi-phase transformation point composite heat storage heat exchanger to replace a water storage tank or a direct heat type double-pipe heat interchanger or a plate heat exchanger or other heat exchangers adopted in the prior art.

Description

technical field [0001] The invention relates to a heat supply system, in particular to a direct heating type multi-phase transition point compound heat storage heat pump water heater system. Background technique [0002] The air source heat pump water heater is a device that converts low-grade heat in the air into a high-temperature heat source to heat hot water by consuming a small amount of high-grade electric energy. Air source heat pump water heaters are getting more and more attention due to environmental protection, energy saving and safety. [0003] Air source direct heat pump water heaters without water storage tanks often use plate heat exchangers or casing heat exchangers. When the user needs to use hot water, the compressor of the heat pump system starts, and the high-temperature and high-pressure refrigerant flows through the condenser and heats the cold water flowing through the condenser at the same time. Since the evaporation temperature of the air source he...

AI Technical Summary

Problems solved by technology

When the family uses hot water frequently in a short period of time in daily life in winter, the high-power heat pump compressor starts and stops frequently, which has a great impact on the power grid and affects the life of the compressor.

However, the direct heat pump water heater with a water storage tank has higher requirements for installation location and space due to the larger volume of the water storage tank.

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