Multifunctional frost-free solar-assisted heat pump system

Abstract

The invention discloses a multifunctional frost-free solar-assisted heat pump system which comprises a refrigerant loop, a first secondary refrigerant loop, a second secondary refrigerant loop and a domestic hot-water bypass. The refrigerant circulating system of the invention comprises a compressor, a refrigerant stop valve, a four-way valve, a first one-way stop valve, a second one-way stop valve, a first throttling element, a second throttling element, a high-pressure liquid storage tank and a gas-liquid separator which are connected in sequence; the first secondary refrigerant loop comprises a first secondary refrigerant tank, a first secondary refrigerant pump and an indoor heat exchanger which are connected in sequence; the second secondary refrigerant loop comprises a second secondary refrigerant tank, a second secondary refrigerant pump, a cooling tower, a solar heat collector, a first secondary refrigerant stop valve, a second secondary refrigerant stop valve, a third secondary refrigerant stop valve and a fourth secondary refrigerant stop valve. The invention thoroughly solves the problems that the conventional cold / hot water heat pump and air-cooled heat pump can be frosted in winter, therefore, the invention is particularly suitable for places which are rich in solar-energy resources and in need of numerous cooling / heating air-conditioners and hot-water supply at the same time.

Description

technical field [0001] The invention belongs to the fields of heat pump air conditioners, heat pump water heaters and solar energy utilization, and in particular relates to a frost-free multifunctional solar auxiliary heat pump system. Background technique [0002] At present, fossil fuels account for a huge proportion of the energy used by human beings. As a non-renewable energy source, fossil fuels are facing the plight of depletion, and the environmental problems caused by burning fossil energy have seriously threatened the environment on which human beings live. As a renewable clean energy, solar energy is considered to be the energy source with the most development potential in the 21st century, but its low energy density and instability are the biggest problems when using solar energy at present. Solar-assisted heat pump is a good solar energy utilization technology . With the improvement of people's living standards, indoor heating, indoor cooling and hot water heati...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing multifunctional solar-assisted heat pumps are of the indirect expansion type (referred to as the inter-expansion type). Whether it is a small air-cooled system or a medium-to-large water-cooled system, there is a problem of frost in winter, which affects the performance of the system.

Especially for medium and large systems, the structure is usually more complex

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