Thermal insulation system based on photovoltaic power generation

Abstract

The utility model discloses a thermal insulation system based on photovoltaic power generation, and relates to the technical field of thermal insulation houses. The utility model provides a thermal insulation system based on photovoltaic power generation, and the system comprises a housing which is provided with a thermal insulation cavity, and the interior of the thermal insulation cavity is provided with a heat storage or heating device and an energy storage device; the outer wall of the shell is provided with at least one group of photovoltaic modules; and the photovoltaic module is configured to selectively supply power to the heat storage or heating equipment and / or the energy storage equipment.

Description

Technical Field

[0001] This application relates to the technical field of insulation houses, and particularly to a thermal insulation system based on photovoltaic power generation. Background Art

[0002] In alpine and high-altitude pastoral and farming areas, the population is sparse. Usually, the drinking water of pastoral and farming families generally comes from well groundwater. In winter in plateau areas, the outdoor temperature can reach minus twenty or thirty degrees. Therefore, various water supply pipes, faucets, water tanks and other equipment connected to well pumping are extremely easy to freeze and even be damaged, resulting in the inability of farmers and herdsmen to draw water normally and the lack of shower conditions outdoors. Moreover, the power grid in alpine and high-altitude pastoral and farming areas may have unstable power supply, and it is not convenient to pull wires outdoors, while the photovoltaic resources are abundant. Utility Model Content

[0003] The main purpose of this application is to provide a thermal insulation system based on photovoltaic power generation, aiming to solve the technical problems in the prior art that the outdoor environmental temperature is low in alpine and high-altitude areas, the water intake equipment is easy to freeze, and there is no shower condition outdoors.

[0004] To achieve the above object, this application provides a thermal insulation system based on photovoltaic power generation, including:

[0005] A housing having a thermal insulation cavity, in which a heat storage or heating device and an energy storage device are arranged;

[0006] At least one group of photovoltaic modules is arranged on the outer wall of the housing;

[0007] The photovoltaic module is configured to be able to selectively supply power to the heat storage or heating device and / or the energy storage device.

[0008] Optionally, at least two groups of photovoltaic modules are arranged on the outer wall of the housing, at least one group of photovoltaic modules is configured to supply power to the energy storage device, and other groups of photovoltaic modules are configured to be able to selectively supply power to the heat storage or heating device and / or the energy storage device.

[0009] Optionally, a step-down protection device is arranged on the line between the photovoltaic module and the heat storage or heating device.

[0010] Optionally, a charge controller is arranged on the line between the photovoltaic module and the energy storage device.

[0011] Optionally, the heat storage or heating device includes a heat storage tank, a heat conduction medium is arranged in the heat storage tank, and a heating element for heating the heat conduction medium is arranged in the heat storage tank.

[0012] Optionally, the heat storage tank includes a heating element that can be selectively electrically connected to the photovoltaic module and / or the energy storage device.

[0013] Optionally, the heat storage box includes a heating element electrically connected to the photovoltaic module or the energy storage device.

[0014] Optionally, the shell has a first side wall, a second side wall, a third side wall and a top wall, the first side wall is provided with a first photovoltaic component, the second side wall and / or the third side wall is provided with a second photovoltaic component, and the top wall is provided with a third photovoltaic component.

[0015] Optionally, the first side wall is arranged to face south, the second side wall is arranged to face west, the third side wall is arranged to face east, and the north side of the top wall is higher than the south side.

[0016] Optionally, three groups of heating elements are arranged in the heat storage box, the second photovoltaic component is electrically connected to one group of heating elements, the first photovoltaic component can be selectively electrically connected to one group of heating elements or energy storage devices, and the third photovoltaic component can be selectively electrically connected to the remaining heating elements or energy storage devices.

[0017] Optionally, the energy storage device is a battery.

[0018] Beneficial effects that this application can achieve:

[0019] The embodiment of the present application proposes a thermal insulation system based on photovoltaic power generation. By setting a heat storage or heating device and an energy storage device in the thermal insulation cavity of the shell, the air in the thermal insulation cavity can be heated by the heat storage or heating device to maintain the temperature in the thermal insulation cavity within a certain range. A photovoltaic module is set on the outer wall of the shell, and an energy storage device is also set in the thermal insulation cavity. The photovoltaic module can supply the generated electric energy to the energy storage device according to the actual use situation, or transmit the generated electric energy to the energy storage device to charge the energy storage device. The energy storage device can supply power to the heat storage or heating device or other equipment in the thermal insulation cavity. The electric energy generated by the photovoltaic module can be reasonably utilized to maintain the temperature in the thermal insulation cavity of the shell within a certain range. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a heat preservation system according to an embodiment of the present application;

[0021] Figure 2 This is a schematic diagram of a water treatment system when the housing of an embodiment of the present application is a small housing;

[0022] Figure 3 This is a schematic diagram of a case where the housing of an embodiment of the present application is a small housing;

[0023] Figure 4 It is a schematic top view of the interior when the shell is a small shell.

[0024] Numbers in the figure:

[0025] 10 - housing, 11 - first side wall, 111 - first photovoltaic module, 12 - second side wall, 121 - second photovoltaic module, 13 - third side wall, 14 - top wall, 141 - third photovoltaic module, 20 - heat storage or heating device, 21 - heating element, 30 - energy storage device, 40 - charge controller, 50 - contactor, 60 - temperature controller, 70 - step - down protector.

[0026] The realization of the purpose, functional features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0028] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0029] In the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0030] In addition, if the embodiments of the present utility model involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0031] Embodiment 1

[0032] Referring to Figures 1-3 , Figure 2 the left side in [reference] is the placement area of the water treatment system, and the right side is used to place the heat storage or heating equipment. Figure 3 It is a schematic diagram when the housing is of a small structure. Figure 4 It is an internal top view schematic diagram when the housing is a small housing. The water treatment system and the heat storage or heating equipment are arranged on one side, the water intake area is arranged on the other side, and the power distribution equipment is arranged above the water intake area to separate the water treatment system from the power distribution facilities and the water intake area.

[0033] The first embodiment of the present application provides a heat preservation system based on photovoltaic power generation, including: a housing 10 having a heat preservation cavity, in which a heat storage or heating device 20 and an energy storage device 30 are arranged; at least one group of photovoltaic modules is arranged on the outer wall of the housing 10; the photovoltaic modules are configured to be able to selectively supply power to the heat storage or heating device 20 and / or the energy storage device 30.

[0034] In this embodiment, a water treatment system, lighting equipment, shower equipment, etc. can be arranged in the heat preservation cavity. The water treatment system is used to purify source water such as groundwater or tap water. The water treatment system is provided with a purified water storage tank, and farmers and herdsmen can obtain purified water from the purified water storage tank. By arranging the water treatment system in the heat preservation cavity, the temperature in the heat preservation cavity is maintained within a certain range, so that pipeline box structures, etc. will not be frozen, ensuring smooth water intake. The water treatment system can be equipment for treating water or only play the role of pumping water. A shower area can also be arranged in the heat preservation cavity, and the shower equipment is arranged in the shower area to provide shower conditions for farmers and herdsmen. It should be noted that the water treatment system and the shower equipment can be arranged in the heat preservation cavity at the same time, or only the water treatment system or only the shower equipment can be arranged. When the shower equipment is arranged, the shower area is separated to reduce the impact of shower water during showering on the normal operation of other equipment. The electric energy generated by the photovoltaic module is preferentially supplied to the heat storage or heating device 20 to make the heat storage or heating device 20 work, maintaining the temperature in the heat preservation cavity within the first range. When the electric energy generated by the photovoltaic module meets the power consumption requirements of the heat storage or heating device 20, the photovoltaic module supplies the surplus electric energy to the energy storage device 30 for storage. The heat storage or heating device 20 can also directly heat the air in the heat preservation cavity.

[0035] The working principle of the photovoltaic module is based on the photovoltaic effect of semiconductor materials. When sunlight shines on the surface of the photovoltaic module, photons are absorbed by the semiconductor material and excite electrons to transition to a higher energy level, forming free electrons and holes. The free electrons and holes move and separate in the semiconductor to form an electric current. In the structure of the photovoltaic module, a P-type semiconductor and an N-type semiconductor form a PN junction. When electrons and holes move to this interface, charge separation will occur and a voltage will be generated. When an external circuit is connected to the photovoltaic module, electrons will flow through the circuit to form an output current.

[0036] Embodiment 2

[0037] As an alternative implementation, referring to Figure 1 , this embodiment provides a specific structure when two groups of photovoltaic modules are provided, including: at least two groups of photovoltaic modules are arranged on the outer wall of the housing 10, and at least one group of photovoltaic modules is configured to supply power to the energy storage device 30, and other groups of photovoltaic modules are configured to selectively supply power to the heat storage or heating device 20 and / or the energy storage device 30.

[0038] Optionally, a step-down protection device is arranged on the line between the photovoltaic module and the heat storage or heating device 20.

[0039] Optionally, a charge controller 40 is arranged on the line between the photovoltaic module and the energy storage device 30.

[0040] In this embodiment, two sets of photovoltaic modules are provided on the outer wall of the housing 10. One set of photovoltaic modules is fixedly used to supply power to the heat storage or heating device 20, so that the heat storage or heating device 20 operates to maintain the temperature in the heat preservation cavity within a certain range. When one set of photovoltaic modules can meet the power consumption requirements of the heat storage or heating device 20, the other set of photovoltaic modules supplies power to the energy storage device 30; when one set of photovoltaic modules cannot meet the power consumption requirements of the heat storage or heating device 20, the other set of photovoltaic modules preferentially supplies power to the heat storage or heating device 20, and if there is surplus electric energy in the other set of photovoltaic modules, the surplus electric energy is then transmitted to the energy storage device 30. The heat storage or heating device 20 can also be a device such as an electric heater.

[0041] Due to the influence of factors such as light intensity and the incident angle of sunlight at different time periods, the power generation efficiency of the photovoltaic modules is different. When the power generation efficiency of the photovoltaic modules is insufficient, it is usually necessary to increase the number of photovoltaic modules supplying power to the heat storage or heating device 20. When the power generation efficiency of the above-mentioned photovoltaic modules is sufficient, if the above-mentioned number of photovoltaic modules still supplies power to the heat storage or heating device 20, it may lead to waste of electricity, or the heat storage or heating device 20 continuously heats up, causing the temperature range in the heat preservation cavity to exceed the preset temperature range, resulting in adverse effects such as overheating in the heat preservation cavity. Therefore, in the case of surplus power generation, the surplus electric energy is transported to the energy storage device 30 for storage. Therefore, it is necessary to switch the destination of the electric energy generated by the photovoltaic modules according to the power generation efficiency of the photovoltaic modules. When at least one set of photovoltaic modules supplies power to the heat storage or heating device 20, if the above-mentioned photovoltaic modules meet the power consumption requirements of the heat storage or heating device 20, the other sets of photovoltaic modules supply power to the energy storage device 30. When the power generation efficiency of the above-mentioned photovoltaic modules decreases and the above-mentioned photovoltaic modules can no longer meet the power consumption requirements of the heat storage or heating device 20, at this time, the other sets of photovoltaic modules switch the direction of electric energy output, switching from the energy storage device 30 to the heat storage or heating device 20 to preferentially meet the power supply requirements for the heat storage or heating device 20. It should be noted that the heat storage or heating device 30 can be equipped with a temperature control system inside, or a temperature control device can be additionally installed on the pipeline of the heat storage or heating device 30 to perform the switching of the contactor.

[0042] The photovoltaic modules fixedly used to supply power to the heat storage or heating device 20 are directly connected to the heat storage or heating device 20. The other set of photovoltaic modules is connected with a contactor 50. The contactor 50 is respectively connected to the heat storage or heating device 20 through a first cable and connected to the energy storage device 30 through a second cable. A step-down protector 70 is provided on the line of the first cable, and a charging controller 40 is provided on the line of the second cable. The connection between the contactor 50 and the heat storage or heating device 20 or the energy storage device 30 is controlled through the line. The step-down protector 70 is a common DC-DC converter, which works by reducing the input voltage to the required output voltage, such as the human body safety voltage.

[0043] Example 3

[0044] As an alternative implementation, referring to Figure 1 , this embodiment provides a specific structure of a heat storage or heating device 20, including: The heat storage or heating device 20 includes a heat storage tank, a heat conduction medium is arranged in the heat storage tank, and a heating element 21 for heating the heat conduction medium is arranged in the heat storage tank. As another heating method, the heat storage or heating device 20 can also control the temperature in the heat preservation cavity by means of electric heating supplemented by temperature control.

[0045] Optionally, the heating element 21 that can be selectively electrically connected to the photovoltaic module and / or the energy storage device 30 is included in the heat storage tank.

[0046] Specifically, the heating element 21 is connected to the photovoltaic module and the energy storage device 30 through cables at the same time, and it can be switched through a switch or the like to achieve: the heating element 21 is in a connected state with the photovoltaic module, and the heating element 21 is in an open state with the energy storage device 30; the heating element 21 is in an open state with the photovoltaic module, and the heating element 21 is in a connected state with the energy storage device 30; the heating element 21 is in a connected state with the photovoltaic module, and the heating element 21 is in a connected state with the energy storage device 30. In order to be able to switch between the above states according to the power generation efficiency of the photovoltaic module and the power consumption demand of the heat storage or heating device 20. To achieve that the photovoltaic module supplies power to the heating element 21 alone, or the energy storage device 30 supplies power to the heating element 21 alone, or the photovoltaic module and the energy storage device 30 supply power to the heating element 21 at the same time.

[0047] Optionally, the heating element 21 that is electrically connected to the photovoltaic module or the energy storage device 30 is included in the heat storage tank.

[0048] Specifically, the heating element 21 is electrically connected to the photovoltaic module, or the heating element 21 is electrically connected to the energy storage device 30, so as to achieve power supply to the heating element 21 by the photovoltaic module, or power supply to the heating element 21 by the energy storage device 30.

[0049] In this embodiment, one of the structures of the heat storage or heating device 20 includes a heat storage tank. A heating element 21 is arranged in the heat storage tank. The heating element 21 can be an electric heating wire. A heat conduction medium is arranged in the heat storage tank. The heat conduction medium can be heat conduction oil or heat conduction water, and the heat conduction medium can also be a solid heat storage brick. The heat storage tank is made of a heat conduction medium, such as iron. When the heating element 21 works, the temperature in the heat preservation cavity is increased through the heating element 21, the heat conduction medium and the heat storage tank. By continuously heating the heating element 21, the temperature in the heat preservation cavity can be maintained within a certain temperature range. When two groups of photovoltaic modules are arranged on the outer wall of the housing 10, one group of photovoltaic modules is fixed to supply power to a part of the heating element 21. When the above-mentioned heating element 21 can meet the heating requirements, the remaining heating elements 21 are in an unoperated state. When the above-mentioned photovoltaic modules cannot meet the power consumption requirements of the heat storage or heating device 20, the other group of photovoltaic modules supplies power to the remaining unoperated heating elements 21 to increase the number of heating elements 21 in the heat storage or heating device 20.

[0050] Embodiment 4

[0051] As an optional implementation manner, referring to Figure 1 , this embodiment provides a specific structure in which three groups of photovoltaic modules are arranged on the outer wall of the housing 10, including: the housing 10 has a first side wall 11, a second side wall 12, a third side wall 13 and a top wall 14. A first photovoltaic module 111 is arranged on the first side wall 11, a second photovoltaic module 121 is arranged on the second side wall 12 and / or the third side wall 13, and a third photovoltaic module 141 is arranged on the top wall 14.

[0052] Optionally, the first side wall 11 faces south, the second side wall 12 faces west, the third side wall 13 faces east, and the north side of the top wall 14 is higher than the south side.

[0053] Optionally, three groups of heating elements 21 are arranged in the heat storage tank. The second photovoltaic module 121 is electrically connected to one group of heating elements 21. The first photovoltaic module 111 can be selectively electrically connected to one group of heating elements 21 or the energy storage device 30. The third photovoltaic module 141 can be selectively electrically connected to the remaining heating elements 21 or the energy storage device 30.

[0054] Optionally, the energy storage device 30 is a storage battery.

[0055] In this embodiment, when the thermal insulation system of this embodiment is installed at the target position, it is installed facing south. It should be noted that facing south does not mean only due south, and it can be west of south or east of south, etc. The first photovoltaic module 111 faces south, and the second photovoltaic module 121 can be installed on the west or east side wall of the housing 10 at the same time, or the second photovoltaic module 121 can be installed on one of the west or east side walls of the housing 10. When the second photovoltaic modules 121 are installed on both the west and east side walls of the housing 10 at the same time, the housing 10 is further provided with a maintenance door on the north side wall, and the equipment in the thermal insulation cavity can be maintained through the maintenance door. Theoretically speaking, for the power generation efficiency of the photovoltaic panels, the third photovoltaic module 141 is greater than the first photovoltaic module 111, and the first photovoltaic module 111 is greater than the second photovoltaic module 121. The second photovoltaic module 121 is connected to one of the heating elements 21, and the first photovoltaic module 111 supplies power to one of the heating elements 21. Through the second photovoltaic module 121, the power supply of the first photovoltaic module 111 and the third photovoltaic module 141 to the heat storage or heating device 20 can be reduced, so as to supply power to the energy storage device 30 as much as possible.

[0056] During the use process, the second photovoltaic module 121 only supplies power to the heat storage or heating device 20. When the second photovoltaic module 121 meets the power consumption requirements of the heat storage or heating device 20 to maintain the temperature in the thermal insulation cavity within the preset range, the electric energy generated by the first photovoltaic module 111 and the third photovoltaic module 141 is transmitted to the energy storage device 30. When the second photovoltaic module 121 does not meet the power consumption requirements of the heat storage or heating device 20 to maintain the temperature in the thermal insulation cavity within the preset range, at this time, the first photovoltaic module 111 supplies power to the heat storage or heating device 20. If the electric energy generated by the first photovoltaic module 111 can meet the power consumption requirements of the heat storage or heating device 20 to maintain the temperature in the thermal insulation cavity within the preset range, the electric energy generated by the third photovoltaic module 141 is transmitted to the energy storage device 30. If there is surplus electric energy in the first photovoltaic module 111, the surplus electric energy of the first photovoltaic module 111 is also transmitted to the energy storage device 30. When the electric energy generated by the first photovoltaic module 111 and the second photovoltaic module 121 cannot meet the power consumption requirements of the heat storage or heating device 20 to maintain the temperature in the thermal insulation cavity within the preset range, the third photovoltaic module 141 supplies the generated electric energy to the heat storage or heating device 20, and only when the third photovoltaic module 141 has surplus electric energy will the electric energy be transmitted to the energy storage device 30.

[0057] It should be noted that the connection principles of the first photovoltaic module 111 and the third photovoltaic module 141 to the heating element 21 are the same. Now, taking the first photovoltaic module 111 as an example, the first photovoltaic module 111 is connected in parallel with the energy storage device 30 and the heating element 21. The first photovoltaic module 111 is connected with a contactor 50. The contactor 50 is respectively connected to the heating element 21 through a first cable and connected to the energy storage device 30 through a second cable. A step-down protector 70 is provided on the line of the first cable, and a charge controller 40 is provided on the route of the second cable. The connection or disconnection between the heating element 21 and the energy storage device 30 is controlled by the contactor 50. The step-down protector 70 is a common DC-DC converter, which works by reducing the input voltage to the required output voltage, such as the human safety voltage. The contactor 50 connected to the first photovoltaic module 111 and the contactor 50 connected to the second photovoltaic module 121 are both connected to a digital temperature controller 60. The energy storage device 30 is connected with an inverter.

[0058] For easy understanding, now taking the example of setting the third photovoltaic module 141 on the outer top wall 14 of the housing 10 and setting the first photovoltaic module 111 on the outer wall of the housing 10 facing south, a quantitative example is given. Suppose it is necessary to maintain the temperature in the heat preservation cavity at 5 °C. At this time, it is required that the outer wall temperature of the heat storage or heating device 2030 is 10 °C. A group of heating elements 21 can make the outer wall temperature of the heat storage or heating device 20 reach 10 °C. The electric energy required for the heating element 21 to heat the heat conducting medium in the heat storage or heating device 20 and make the outer wall of the heat storage or heating device 20 reach 10 °C is 10 units. If the power generation of the first photovoltaic module 111 is 10 units, then all the electric energy generated by the first photovoltaic module 111 is supplied to the heating element 21. At this time, all the electric energy generated by the third photovoltaic module 141 is supplied to the energy storage device 30; if the power generation of the first photovoltaic module 111 is 15 units, then 10 units of the electric energy generated by the first photovoltaic module 111 is supplied to the heating element 21, and the remaining 5 units of electric energy is supplied to the energy storage device 30. At this time, all the electric energy generated by the third photovoltaic module 141 is supplied to the energy storage device 30; if the power generation of the first photovoltaic module 111 is 5 units, then all the electric energy generated by the first photovoltaic module 111 is supplied to the heating element 21, and the third photovoltaic module 141 supplies 5 units of electric energy to the heating element 21. It should be noted that the above values are only for intuitive representation and are not actual usage limitations.

[0059] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present application.

Claims

1. A heat preservation system based on photovoltaic power generation, characterized in that, Comprising: A housing having a heat insulation cavity, in which a heat storage or heating device and an energy storage device are provided; At least one set of photovoltaic modules is provided on the outer wall of the housing; The photovoltaic modules are configured to be selectively powered to the heat storage or heating device and / or the energy storage device.

2. The heat preservation system based on photovoltaic power generation according to claim 1, wherein, At least two sets of photovoltaic modules are provided on the outer wall of the housing, wherein at least one set of photovoltaic modules is configured to power the energy storage device, and the other photovoltaic modules are configured to be selectively powered to the heat storage or heating device and / or the energy storage device.

3. The insulation system based on photovoltaic power generation according to claim 1, characterized in that, A step-down protection device is provided on the line between the photovoltaic module and the heat storage or heating device.

4. The heat preservation system based on photovoltaic power generation according to claim 1, wherein A charge controller is provided on the line between the photovoltaic module and the energy storage device.

5. The heat preservation system based on photovoltaic power generation according to claim 1, characterized in that, The heat storage or heating device includes a heat storage tank, in which a heat conducting medium is provided, and a heating element for heating the heat conducting medium is provided in the heat storage tank.

6. The thermal insulation system based on photovoltaic power generation according to claim 5, wherein, The heat storage tank includes a heating element that can be selectively electrically connected to the photovoltaic module and / or the energy storage device.

7. The heat preservation system based on photovoltaic power generation according to claim 5, characterized in that The heat storage tank includes a heating element that is electrically connected to the photovoltaic module or the energy storage device.

8. The heat preservation system based on photovoltaic power generation according to claim 5, characterized in that, The housing has a first side wall, a second side wall, a third side wall and a top wall. The first side wall is provided with a first photovoltaic module, the second side wall and / or the third side wall are provided with a second photovoltaic module, and the top wall is provided with a third photovoltaic module.

9. The heat preservation system based on photovoltaic power generation according to claim 8, characterized in that, The first side wall faces south, the second side wall faces west, the third side wall faces east, and the north side of the top wall is higher than the south side.

10. The heat preservation system based on photovoltaic power generation according to claim 8, wherein, Three sets of heating elements are provided in the heat storage tank. The second photovoltaic module is electrically connected to one set of heating elements. The first photovoltaic module can be selectively electrically connected to one set of heating elements or the energy storage device. The third photovoltaic module can be selectively electrically connected to the remaining heating elements or the energy storage device.

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