Solar assisted heat pump heater and control method
A technology of solar heat pump and control method, which is applied to the control of the above-mentioned water heater, solar heat pump water heater, heat pump water heater field, can solve the problems of high production cost of heat pump system, unfavorable mass production, etc., and achieve suitable promotion and use, and sufficient heat exchange efficiency Play and improve the effect of system efficiency
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Embodiment 1
[0052] In this embodiment, the solar heat pump water heater further includes an electric heating module for heating the water in the water tank. The electric heating module can be composed of electric heating tubes, electric heating wires and other components arranged in the water tank and / or on the outer wall of the water tank to achieve direct or indirect contact with the water in the water tank to complete the purpose of preparing high-temperature water. (not indicated in the attached picture)
[0053] When the heat pump system prepares high-temperature water, there are disadvantages such as slow water temperature rise rate and high energy consumption in the heating process; therefore, when the water temperature in the water tank is higher than the set value T2, the heat pump system stops working, and the electric heating module is used to control the water temperature in the water tank. By heating the water, the purpose of rapid and low-energy preparation of high-temperatu...
Embodiment 2
[0063] In this embodiment, the heat pump water heater can adjust the opening of the electronic expansion valve of the heat pump system correspondingly according to the difference between day and night, and according to the presence or absence of solar radiation heat, so as to provide the best heating mode for the system. Therefore, the heat pump water heater can be adjusted according to the water temperature of the water tank, according to different heating methods and temperature parameters, so as to be suitable for complex external environment changes.
[0064] In this embodiment, when the working time of the water heater is in the daytime mode, the corresponding variable P1 is obtained according to the detected temperature of the evaporator environment; and the corresponding electronic expansion valve is obtained according to the detected value of the compressor suction end temperature or the discharge end temperature Opening degree P0; thus, the final electronic expansion v...
Embodiment 3
[0080] Such as figure 1 As shown, in this embodiment, the evaporator 100 is provided with an evaporator temperature sensor 4 for detecting the temperature of the evaporator 100 itself, and an ambient temperature sensor 5 for detecting the ambient temperature of the evaporator 100 . The evaporator temperature sensor 4 is arranged on the back of the evaporator 100; the ambient temperature sensor 5 is arranged on the side of the evaporator 100 to improve measurement accuracy.
[0081] Through the above settings, the opening of the electronic expansion valve can be adjusted correspondingly according to the temperature of the evaporator itself and the ambient temperature, so as to optimize the power of the heat pump system.
[0082] In the process of steps 1) to 5) of the first embodiment above, the evaporator temperature change rate is obtained according to the evaporator temperature detection value; when the evaporator temperature change rate is larger, the opening of the electro...
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