Ultralow-temperature overlapped triple generation heat pump unit

Abstract

The invention provides an ultralow-temperature overlapped triple generation heat pump unit.The ultralow-temperature overlapped triple generation heat pump unit is characterized in that a low-temperature heat pump system, a high-temperature heat pump system, a hot water producing device and a control center are included; the hot water producing device comprises a hot water producing heat exchanger, a circulating water pump is arranged at the cold water inlet end of the hot water heat exchanger, and an evaporation condenser is connected with a high-temperature throttling device through a high-temperature heat exchanger switching solenoid valve; the output end of a high-temperature part compressor is connected with the heat medium input end of the hot water producing heat exchanger, the heat medium output end of the hot water producing heat exchanger is connected with a high-temperature part four-way valve, and the high-temperature part four-way valve is controlled to control the output end of the high-temperature part compressor to be selectively communicated with a high-temperature part air cooling heat exchanger or a high-temperature part water side heat exchanger.The needs for air conditioner refrigeration and heating and domestic hot water can be met at the same time, an overlapped system is not started during refrigeration, single-stage compression is adopted for refrigeration, the system is simpler and better in energy saving effect, the overlapped system is adopted in the low-temperature heating process, and the heating energy efficiency is higher.

Description

technical field [0001] The invention relates to the field of cooling and heating equipment, in particular to an ultra-low temperature cascade triple heat pump unit. Background technique [0002] At present, my country's ordinary air source heat pump cold and hot water air conditioning units and air source heat pump water heater units are basically two independent devices, which are composed of compressors, heat exchangers, throttles, heat absorbers, compressors A circulatory system composed of other devices. The refrigerant circulates in the system under the action of the compressor. It completes the process of boosting the pressure and temperature of the gaseous state in the compressor, and the temperature is as high as 100°C. After entering the heat exchanger, it exchanges heat with the wind, is cooled and converted into a liquid state, and when it runs to the heat absorber, the liquid state quickly absorbs The thermal evaporation is converted into a gaseous state again, ...

AI Technical Summary

Problems solved by technology

[0003] Generally, the traditional air source heat pump cold and hot water air conditioner unit and the air source heat pump water heater unit are two independent devices with single function, low equipment utilization rate and low energy utilization rate

Moreover, in the actual application process, due to the nature of the refrigerant and the limitations of the refrigeration system, when the ambient temperature is low, the heating capacity and efficiency of the air source heat pump cold and hot water air conditioning unit and the air source heat pump water heater unit are low.

At the same time, the heating operation condition of the unit at low temperature is harsh, the system compression ratio is too high, the exhaust temperature is high, and the viscosity of the lubricating oil is low, resulting in a short operating life of the entire system

[0004] At the same time, there is also a demand for hot water supply in the actual user needs. At present, there are few solutions on the market that comprehensively consider user needs and provide a complete system to meet customer needs for hot water, cooling and heating.

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