Central heating-heat pump coupled water heater system

Abstract

The invention relates to a central heating-heat pump coupled water heater system. The system consists of a heat pump system and a water loop, wherein the heat pump system comprises a compressor, a condenser, a reservoir, a throttle valve, a first refrigerant side valve, a second refrigerant side valve, an outdoor evaporator and an indoor evaporator; the water loop comprises a first heat exchanger, a second heat exchanger, a first water side valve, a second water side valve, a third water side valve, a fourth water side valve, a water storage barrel and a three-way valve; the water loop can consist of three parts: a heat exchange water loop, a central heating loop and a hot water loop. The water heater can realize whole-year operation. In heating seasons, on one hand, heating can be directly carried out through central heating water supply to obtain hot water, and on the other hand, the central heating heat is absorbed by the evaporators of the heat pump, is compressed by the compressor and then undergoes heat release in the condenser to obtain hot water; in non-heating seasons, the outdoor air heat is absorbed through the evaporators of the heat pump, is compressed through the compressor and undergoes heat release in the condenser to obtain hot water.

Description

technical field [0001] The invention relates to a heating air-heat pump coupled water heater system, which belongs to the technical field of heat pump utilization. Background technique [0002] With the improvement of people's living standards, water heaters have become an inevitable choice for most families. At present, due to the reverse Carnot cycle, the heat pump water heater can recover the heat in the atmosphere, and has the effect of high efficiency and energy saving, and has been applied in many families. However, when the heat pump water heater is running in winter, due to the low outdoor ambient temperature, its operating evaporation temperature is low, the heat transfer surface is easy to frost, and the overall efficiency drops sharply. protected and unable to operate. [0003] Considering that central heating is generally available in northern regions, most urban residents are equipped with radiators to heat the rooms, coupled with the continuous improvement of...

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Problems solved by technology

However, when the heat pump water heater is running in winter, due to the low outdoor ambient temperature, its operating evaporation temperature is low, the heat transfer surface is easy to frost, and the overall efficiency drops sharply. protected and unable to run

[0003] Considering that central heating is generally available in northern regions, most urban residents are equipped with radiators to heat the rooms, coupled with the continuous improvement of the heat exchange efficiency of radiators in recent years and the application of new heating methods such as floor heating, the comfort of residents' homes has been greatly improved. Increase, and even some families need to open windows to dissipate heat due to high indoor temperature, and there is residual heating heat

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