Air type photovoltaic photo-thermal water heating system

Abstract

The air type photovoltaic photo-thermal water heating system comprises a heat collection bin, the heat collection bin is a sealed bin body and comprises a bottom face, a sunward inclined face, a sunward vertical face and two side vertical faces, the sunward inclined face comprises an inclined face support, a photovoltaic assembly is laid on the inclined face support, and an air source heat pump is arranged in the heat collection bin; the power output end of the photovoltaic assembly is connected with the power input end of the air source heat pump through a first inverter, the air source heat pump communicates with the heat storage water tank through a heat pump water inlet pipe and a heat pump water outlet pipe, the heat pump water inlet pipe is connected with a heating circulating pump, a first temperature sensor is arranged in the heat collection bin, and a second temperature sensor is arranged outside the heat collection bin. The heat collecting bin is further provided with an air inlet fan and an air outlet fan, and the air inlet fan, the air outlet fan, the air source heat pump, the first temperature sensor and the second temperature sensor are connected with the first controller. By using the system, the temperature in the heat collection bin can be adjusted according to needs, and the heating efficiency of the system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of building energy conservation, and in particular to an air-type photovoltaic thermal water heating system. Background Art

[0002] At present, the existing photovoltaic solar thermal water heating system usually installs a solar thermal panel on the back of each photovoltaic panel. The solar thermal panel is bonded to the back of the photovoltaic panel by thermal conductive glue. The solar thermal panel contains a circulation channel. The photovoltaic panel generates electricity and generates a large amount of heat under the sun. The heat is transferred to the solar thermal panel through the thermal conductive glue. The heat medium in the flow channel of the solar thermal panel circulates the heat to the insulation water tank. In order to prevent insufficient solar heat, the system needs to add auxiliary heating equipment, usually using air source heat pump. The evaporator of the air source heat pump absorbs heat from the ambient air and assists in heating the water temperature through the compressor. The normal ambient operating temperature of the air source heat pump is between -20°-40°, and the efficiency is highest when the ambient air temperature is 20°-40°. However, in winter, due to the low ambient temperature and less heat in the air, the heating efficiency of the air source heat pump is very low. At the same time, in a low-temperature environment, since the air in the environment contains moisture, the evaporator of the air source heat pump is prone to frost and cannot absorb heat from the hot air. When the amount of frost is serious, it may even fail to start. The air source heat pump needs to be defrosted continuously during operation, resulting in energy waste. The thermal efficiency of the air source heat pump is even lower. In a low-temperature environment, the system has low heating efficiency and greatly increases the failure rate.

[0003] The photovoltaic thermal panels, the main components of the system, have a complex structure and high cost, and the circulation system requires secondary heat exchange, making the system difficult to promote and apply.

[0004] Therefore, it is necessary to provide an air-type photovoltaic thermal water heating system to solve the above technical problems. Summary of the invention

[0005] The purpose of the present invention is to address the deficiencies in the prior art and provide an air-type photovoltaic thermal water heating system that can utilize the hot air in the heat collection bin to heat the water temperature through the operation of an air source heat pump, thereby improving the heating efficiency of the air source heat pump and avoiding malfunctions of the air source heat pump due to frosting during use.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] An air-type photovoltaic thermal water heating system comprises a heat collecting bin, which is a sealed bin body, comprising a bottom, a sun-facing slope, a shade-facing facade and two side facades, the sun-facing slope comprising a slope bracket, on which a photovoltaic module is laid, an air source heat pump is arranged in the heat collecting bin, the power output end of the photovoltaic module is connected to the power input end of the air source heat pump through a first inverter, the air source heat pump is connected to a hot water storage tank through a heat pump water inlet pipe and a heat pump water outlet pipe, the heat pump water inlet pipe is connected to a heating circulation pump, a first temperature sensor is arranged in the heat collecting bin, a second temperature sensor is arranged outside the heat collecting bin, and an air inlet fan and an air outlet fan are also arranged in the heat collecting bin, and the air inlet fan, the air outlet fan, the air source heat pump, the first temperature sensor and the second temperature sensor are respectively connected to a first controller.

[0008] Preferably, the photovoltaic assembly includes a plurality of photovoltaic panels distributed in an array, adjacent photovoltaic panels are sealed by sealing strips, and the back panels of the photovoltaic panels are used to heat the air in the heat collection chamber.

[0009] Preferably, a heating water supply pipe and a heating water return pipe are respectively provided on one side of the hot water storage tank, and a heating circulation pump is connected to the heating water supply pipe.

[0010] Preferably, the shade-facing facade and the two side facades are both thermal insulation walls.

[0011] Preferably, the air inlet fan and the air outlet fan are arranged on the sun-facing slope, the shade-facing facade or the two side facades, and the installation positions of the air inlet fan and the air outlet fan are arranged diagonally.

[0012] Preferably, the hot water storage tank is arranged inside or outside the heat collecting bin.

[0013] Preferably, the photovoltaic assembly is connected to an MPPT controller, a grid-connected inverter and a grid-connected cabinet in sequence, and the grid-connected cabinet is connected to the national grid.

[0014] Preferably, the photovoltaic assembly includes photovoltaic panels and solar panels, and the photovoltaic panels and solar panels are arranged in an array combination.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. The solar collector is set as a sealed chamber, and the air in the solar collector is heated by the solar thermal panel to increase the ambient temperature in the solar collector, thereby improving the heating efficiency of the air source heat pump.

[0017] 2. When there is insufficient sunlight in winter, the continuous operation of the air source heat pump will absorb the heat in the solar collector and lower the temperature of the air in the solar collector. The first temperature sensor and the second temperature sensor will monitor the temperature inside and outside the solar collector in real time. When the temperature inside the solar collector is lower than the temperature outside the solar collector, the first controller starts the air inlet fan to transport the air outside the solar collector into the solar collector, so that the temperature inside the solar collector increases to meet the normal operation of the air source heat pump.

[0018] 3. The air source heat pump is installed in a sealed heat collection chamber. Since the amount of air in the heat collection chamber is fixed, the fixed volume of air has less water vapor, making it difficult for the evaporator of the air source heat pump to frost, thus ensuring the normal operation of the air source heat pump.

[0019] 4. In the summer when there is sufficient sunshine, the first temperature sensor and the second temperature sensor are used to monitor the temperature inside and outside the solar collector in real time. When the temperature inside the solar collector is higher than the temperature outside the solar collector, the first controller starts the air outlet fan to transport the air inside the solar collector to the outside of the solar collector, thereby lowering the ambient temperature inside the solar collector and allowing the photovoltaic panels to operate at room temperature. At the same time, it also meets the requirements for the normal operation of the air source heat pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure inside the solar collector;

[0022] Figure 3 It is a top view of the photovoltaic module;

[0023] Among them, 1-shady facade, 2-side facade, 3-inclined bracket, 4-photovoltaic panel, 5-sealing strip, 6-hot water storage tank, 7-air source heat pump, 8-heating circulation pump, 9-heating circulation pump, 10-first temperature sensor, 11-second temperature sensor, 12-inlet fan, 13-outlet fan, 14-first controller DETAILED DESCRIPTION

[0024] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0025] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixed connection" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0026] In the present invention, the directions or positional relationships indicated by terms such as "upper", "lower", "bottom", "top", etc. are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention. They do not specifically refer to any part or element in the present invention and cannot be understood as limitations on the present invention.

[0027] like Figures 1 to 3 As shown, an air-type photovoltaic thermal water heating system includes a heat collecting bin, which is a sealed bin body, including a bottom, a sun-facing slope, a shaded facade 1 and two side facades 2, the shaded facade and the two side facades are both insulation walls, the sun-facing slope includes a slope bracket 3, on which a photovoltaic module is laid, and the photovoltaic module includes two forms, the first includes a plurality of photovoltaic panels 4 distributed in an array, and adjacent photovoltaic panels are sealed by a sealing strip 5, and the second is a combination of photovoltaic panels and solar panels. The first form is used in the drawings in the specification of this embodiment, and the back plate of the photovoltaic panel is used to heat the air in the heat collecting bin. A hot water storage tank 6 and an air source heat pump 7 are installed in the heat collecting bin. The fan of the air source heat pump can accelerate the flow of air in the heat collecting bin, and the power output end of the photovoltaic module is connected to the air through a first inverter. A heat pump water inlet pipe and a heat pump water outlet pipe are arranged between the air source heat pump and the water storage tank, the heat pump water inlet pipe is connected to a heating circulation pump 8, a heating water supply pipe and a heating return pipe are respectively arranged on one side of the water storage tank, the heating water supply pipe is connected to a heating circulation pump 9, a first temperature sensor 10 is installed in the thermal collecting bin to check the temperature inside the thermal collecting bin in real time, a second temperature sensor 11 is installed outside the thermal collecting bin to monitor the temperature outside the thermal collecting bin in real time, and an air inlet fan 12 and an air outlet fan 13 are respectively installed on the two side facades of the thermal collecting bin, the air inlet fan, the air outlet fan, the air source heat pump, the first temperature sensor and the second temperature sensor are respectively connected to the first controller 14, the photovoltaic components are connected to the MPPT controller, the grid-connected inverter and the grid-connected cabinet in sequence, and the grid-connected cabinet is connected to the national power grid.

[0028] Principle and use of an air-type photovoltaic thermal water heating system:

[0029] When used in winter, photovoltaic modules are used to absorb solar energy. Part of the absorbed solar energy is converted into electrical energy, which is used to supply power to the air source heat pump through the first inverter. The other part of the solar energy is converted into thermal energy, which is used to heat the air in the thermal collection chamber through the heat dissipation of the back panel of the photovoltaic panel. The sealed thermal collection chamber can effectively prevent heat loss. After the air source heat pump absorbs the heat in the air, it transfers the heat to the water, and gradually heats the low-temperature water in the water storage tank to a high temperature through a heating circulation pump, and uses a heating water supply pipe to achieve indoor heating.

[0030] The first temperature sensor and the second temperature sensor are used to monitor the internal temperature and the external temperature of the thermal collecting bin in real time respectively. When the temperature inside the thermal collecting bin decreases due to the continuous heat absorption of the air source heat pump until the temperature inside the thermal collecting bin is lower than the temperature outside the thermal collecting bin, the first controller starts the air inlet fan to draw the air outside the thermal collecting bin into the thermal collecting bin, thereby increasing the temperature inside the thermal collecting bin and ensuring the normal operation of the air source heat pump.

[0031] When there is sufficient sunshine in the summer, the first temperature sensor and the second temperature sensor are used to monitor the temperature inside and outside the solar collector in real time. At this time, the controller settings are changed. When the temperature inside the solar collector is higher than the temperature outside the solar collector, the first controller starts the air outlet fan to transport the air inside the solar collector to the outside of the solar collector, thereby lowering the ambient temperature inside the solar collector and allowing the photovoltaic panels to operate at room temperature. At the same time, it also meets the requirements for the normal operation of the air source heat pump.

[0032] The above description shows and describes the preferred embodiments of the present invention. As mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. An air-type photovoltaic thermal water heating system, characterized in that: The invention comprises a heat collection bin, which is a sealed bin body, comprising a bottom surface, a sun-facing inclined surface, a shade-facing vertical surface (1) and two side vertical surfaces (2). The sun-facing inclined surface comprises an inclined surface bracket (3), on which a photovoltaic module is laid. An air source heat pump (7) is arranged in the heat collection bin, and the power output end of the photovoltaic module is connected to the power input end of the air source heat pump through a first inverter. The air source heat pump is connected to a hot water storage tank (6) through a heat pump water inlet pipe and a heat pump water outlet pipe. The heat pump water inlet pipe is connected to a heating circulation pump (8). A first temperature sensor (10) is arranged in the heat collection bin, and a second temperature sensor (11) is arranged outside the heat collection bin. The heat collection bin is also provided with an air inlet fan (12) and an air outlet fan (13). The air inlet fan, the air outlet fan, the air source heat pump, the first temperature sensor and the second temperature sensor are respectively connected to a first controller (14).

2. The air-type photovoltaic thermal water heating system according to claim 1, characterized in that: The photovoltaic assembly comprises a plurality of photovoltaic panels (4) distributed in an array, adjacent photovoltaic panels are sealed by sealing strips (5), and the back panels of the photovoltaic panels are used to heat the air in the heat collection chamber.

3. The air-type photovoltaic thermal water heating system according to claim 1, characterized in that: A heating water supply pipe and a heating water return pipe are respectively provided on one side of the hot water storage tank, and a heating circulation pump (9) is connected to the heating water supply pipe.

4. The air-type photovoltaic thermal water heating system according to claim 1, characterized in that: The shaded facade and the two side facades are both thermal insulation walls.

5. The air-type photovoltaic thermal water heating system according to claim 1, characterized in that: The air inlet fan and the air outlet fan are arranged on the sun-facing slope, the shade-facing facade or the two side facades, and the installation positions of the air inlet fan and the air outlet fan are arranged diagonally.

6. The air-type photovoltaic thermal water heating system according to claim 1, characterized in that: The hot water storage tank is arranged inside or outside the heat collecting bin.

7. The air-type photovoltaic thermal water heating system according to claim 1, characterized in that: The photovoltaic modules are connected to the MPPT controller, the grid-connected inverter and the grid-connected cabinet in sequence, and the grid-connected cabinet is connected to the national grid.

8. The air-type photovoltaic thermal water heating system according to claim 1, characterized in that: The photovoltaic components include photovoltaic panels and solar panels, which are arranged in an array combination.

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