Heat pump heat supply system for preparing constant-temperature hot water

Abstract

The invention discloses a heat pump heat supply system for preparing constant-temperature hot water, and belongs to the technical field of energy application. The heat pump heat supply system is technically characterized in that a raw water tank is connected with a water mixer through a water supply pipeline, a pressure-fixed tank a is arranged on the water supply pipeline, the two sides of the pressure-fixed tank are provided with a temperature sensor a and an electric adjusting valve a respectively, the water mixer is connected with a water inlet end of a condenser of a heat pump system through a water inlet pipe, a water outlet end of the condenser is connected with a water outlet pipe and a water mixing pipe, the water outlet pipe is connected with a hot water tank, and the water mixing pipe is connected with the water mixer. The heat pump heat supply system has the advantages that constant-temperature water supply is realized with only one hot water storage tank, the power consumption of a heat pump unit can be reduced by about 7% under the same hot water supply temperature, the flow adjustment and control in the system are realized through a water supply pump, the pressure-fixed tank and the electric adjusting valve, the flow adjustment accuracy is ensured, and the water pump energy consumption in the flow adjustment process is greatly reduced.

Description

technical field [0001] The invention relates to a hot spring constant temperature heating system, which belongs to the technical field of energy application. Background technique [0002] Domestic hot water supply systems based on bathing needs are widely found in hotels, hospitals, schools and public baths. Hot water heating methods usually include coal, gas, oil, electric boilers, electric heat pumps, etc. Due to the obvious advantages of energy saving and environmental protection of the heat pump system, it is more and more widely used in this type of system. The heat pump heating system mainly has the following characteristics: (1) The raw water temperature varies greatly with the seasons, and the temperature of the raw water varies by more than 15°C between the four seasons; (2) The hot water load changes greatly, and the hot water consumption is random; (3) When the heat pump unit starts to operate, because the temperature of the raw water is lower than the ambient l...

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Problems solved by technology

[0005] In order to solve the defects existing in the prior art, the object of the present invention is to provide a heat pump heating system for preparing constant temperature hot water. This system solves the problem of switching between the heating water tank and the hot water supply tank, and can automatically adjust the temperature of the water entering the heat pump unit according to the temperature of the raw water. The inlet water temperature of the condenser overcomes the problem that the heat pump unit cannot start normally due to the fact that the pressure of the refrigerant side in the condenser is lower than the pressure of the refrigerant on the side of the evaporator during the start-up process of the heat pump unit due to the low temperature of the raw water

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