Solar and air source double-source heat pump unit and work method thereof

Abstract

The invention relates to a solar and air source double-source heat pump unit and a work method thereof. The solar and air source double-source heat pump unit comprises a compressor, an expansion valve, a double-source finned evaporator, a condenser, an axial flow fan, a four-way valve, a gas-liquid separator, a liquid storage device, a one-way valve set, a refrigerant distributor and a heat pipe type solar heat collector. The compressor is connected with an inlet of the four-way valve through a corresponding exhaust pipeline, and an outlet of the four-way valve is connected with the condenserthrough an exhaust pipeline. The condenser is connected with the liquid storage device and the expansion valve through a refrigerant liquid outlet pipe via the one-way valve set, and the one-way valveset is connected with the double-source finned evaporator through the refrigerant distributor. An air outlet pipe of the double-source finned evaporator is connected with the other inlet of the four-way valve. A middle outlet of the four-way valve is connected with the compressor through a refrigerant air return pipe via the gas-liquid separator, and accordingly a refrigerant cycle is formed. Thedouble-source finned evaporator is connected with the heat pipe type solar heat collector through a heat pipe pipeline, and a heat pipe cycle is formed.

Description

technical field [0001] The invention relates to the technical field of heat pump hot water, in particular to a solar air source dual-source heat pump unit. Background technique [0002] Heat pump technology is a new energy technology that has attracted much attention in the world in recent years. It refers to a device that can obtain low-level heat energy from air, water or soil in nature, and provide high-level heat energy that can be used by people through compressors. . Air source heat pump is one of the most researched heat pump technologies at present, especially in the process of vigorously promoting coal to clean energy in the north recently, ultra-low temperature air source heat pumps have been widely used. [0003] The ultra-low temperature air source heat pumps currently used generally have a sharp drop in operating efficiency when the ambient temperature is low, and there are also problems such as difficulty in defrosting, which restricts the use of ultra-low tem...

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Problems solved by technology

[0003] The ultra-low temperature air source heat pumps currently used generally have a sharp drop in operating efficiency when the ambient temperature is low, and there are also problems such as difficulty in defrosting, which restricts the use of ultra-low temperature air source heat pumps. Often, in order to ensure the use effect in winter, the investment in equipment is increased. , resulting in high initial investment and relatively high operating costs for heating projects

[0004] Most of the northwestern regions of China are areas rich in solar energy resources. At present, there are no mature solar heat pump products on the market. The beneficial combination of air source heat pumps and solar energy cannot realize the complementary advantages of the two, so it cannot fully meet the needs of use.

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