Control system and operation method of a solar water heater combined with heat pump and heat pipe
A technology of solar water heater and control system, which is applied to solar collector controllers, solar heating systems, solar collectors in specific environments, etc., to achieve the effects of simple and reliable connection and transformation, saving operating energy consumption, and high power generation efficiency
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Embodiment 1
[0047] Embodiment 1: as figure 1 As shown, the system of the present invention includes a photovoltaic solar heat pump cycle, a photovoltaic solar heat pipe cycle and a sensor networking control system. In the photovoltaic solar heat pump cycle, the outlet of the photovoltaic heat collecting evaporation plate 1 is connected to the compressor branch cut-off valve 11, the frequency conversion compressor 12, the heat preservation condensate water tank 7, the liquid storage tank 15, the expansion valve branch cut-off valve 14, and the expansion valve 13 in sequence , and finally return to the entrance of the photovoltaic heat-collecting evaporation plate 1 to form a loop. Copper pipes are used to connect the components, and the circulating medium is refrigerant. There are pipes for the refrigerant to absorb heat from the photovoltaic cells.
[0048] Photovoltaic solar heat pipe cycle and photovoltaic solar heat pump cycle share photovoltaic heat collecting evaporation plate 1 and...
Embodiment 2
[0050] Embodiment 2: as figure 1 and 2 As shown, the system can realize two operation modes under the control of the networked controller:
[0051] 1) In the heat pipe operation mode, open the compressor bypass cut-off valve 9, the expansion valve bypass cut-off valve 16 and the working medium pump 10 through the networked controller 4, close the compressor branch cut-off valve 11, the expansion valve branch cut-off valve 14, and refrigerate The agent absorbs heat in the photovoltaic heat-collecting evaporation plate 1, and is transported to the thermal insulation condensate tank 7 by the working fluid pump 10 to release heat and returns to the photovoltaic heat-collecting evaporation plate 1 to continue absorbing heat to form a cycle.
[0052] 2) In the heat pump operation mode, open the compressor branch cut-off valve 9, the expansion valve branch cut-off valve 14, the frequency conversion compressor 12 and the expansion valve 13 through the network controller 4, and close ...
Embodiment 3
[0053] Embodiment 3: as figure 1 As shown, the networked controller 4 is the core component of the system, and the networked controller can be a PLC, a single-chip microcomputer, a computer or other integrated control elements with networking, storage, acquisition and output functions. The ambient temperature sensor 2 and the water tank water temperature sensor 6 can be temperature sensors such as thermocouples and thermal resistors, and the solar radiation sensor 3 can be elements such as a pyranometer and the like that can quantify the radiation intensity. The networked controller 4 can collect the signals of the ambient temperature sensor 2, the solar radiation sensor 3 and the water tank water temperature sensor 6 in real time, and the networked controller 4 can control the compressor bypass, the compressor bypass shut-off valve 9, and the compressor branch through the output signal Stop valve 11, expansion valve branch, expansion valve branch stop valve 14, expansion valv...
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