Low-environmental-temperature air source heat pump refrigerating system with heat pipe loop

Abstract

The invention relates to a low-environmental-temperature air source heat pump refrigerating system with a heat pipe loop. The low-environmental-temperature air source heat pump refrigerating system comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger and a liquid storage device. The compressor is connected with a four-way reversing valve, the four-way reversing valve is respectively connected with the indoor heat exchanger and the outdoor heat exchanger, the indoor heat exchanger is connected with the liquid storage device, and the outdoor heat exchanger is connected with a heating power expansion valve. The low-environmental-temperature air source heat pump refrigerating system is characterized in that an air supply loop and the heat pipe loop are arranged between the indoor heat exchanger and the outdoor heat exchanger, an economizer and an electronic expansion valve are arranged on the air supply loop, a first inlet of the economizer is connected with the liquid storage device, a first outlet of the economizer is respectively connected with the electronic expansion valve and the heat pipe loop, the heat pipe loop comprises a first pipe and a second pipe, the first pipe is connected with the economizer and the bottom of the outdoor heat exchanger, and the second pipe is connected with the bottom of the outdoor heat exchanger and the heating power expansion valve. According to the low-environmental-temperature air source heat pump refrigerating system, the heating capacity attenuation rate in a low-temperature environment can be restrained, and the phenomenon that the outdoor heat exchanger is frozen in the low-temperature and high-humidity environment is avoided.

Description

technical field [0001] The invention relates to an air source heat pump refrigeration system, in particular to a low ambient temperature air source heat pump refrigeration system with a heat pipe circuit. Background technique [0002] With the acceleration of urbanization and the continuous improvement of residents' demand for economy and environmental protection, it is imperative to promote clean energy heating methods. In cities and suburban counties that do not have the conditions for central heating in cities, traditional heating methods of distributed biomass, coal and gas are generally used. This method has low thermal efficiency, high energy consumption, and has also caused serious damage to the environment. pollute. Heat pump heating technology is a new type of energy-saving and environmentally friendly air-conditioning and heating technology supported by national policies. However, when air source heat pumps are extended to cold areas such as the Yellow River Basi...

AI Technical Summary

Problems solved by technology

When the outdoor heat exchanger 6a is turned into an evaporator, the temperature at the bottom drops rapidly below zero degrees Celsius, causing the water that has not flowed away in time to freeze

If the defrosting time is extended, although it can ensure that the defrosting water can flow away in time, it will cause the outdoor heat exchanger 6a to rise too high and cause a high-pressure alarm; in addition, artificially prolonging the defrosting time will also lead to poor heating effect; another On the one hand, when the ambient temperature is lower than -10°C, the compressor 1a cannot be effectively cooled due to the decrease in the mass flow rate of the refrigeration system, and the discharge temperature of the compressor 1a will exceed the design upper limit, resulting in serious attenuation of the heating capacity, and the system cannot be maintained for a long time. time running

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