Solar heat collection and supply system and method

Abstract

The invention discloses a solar heat collection and supply system and method, the solar heat collection and supply system comprises a heat collection unit, a heat supply unit and a heat storage water tank, the heat collection unit and the heat supply unit are both connected with the heat storage water tank, the heat storage water tank comprises a tank body, a first plate and a second plate, and the tank body is provided with an inner cavity; the first plate and the second plate are arranged in the inner cavity to divide the inner cavity into a first chamber and a second chamber, the space size of the first chamber and the space size of the second chamber are adjustable, at least one of the first plate and the second plate is provided with a first hole and a first valve, the first hole is used for communicating the first chamber with the second chamber, and the first valve is used for controlling opening and closing of the first hole. The box body is further provided with a first inlet, a first outlet, a second inlet and a second outlet which are communicated with the first chamber, the first inlet and the first outlet are connected with the heat collection unit, and the second inlet and the second outlet are connected with the heat supply unit. The method has the advantages that the heat energy storage effect is improved, and the solar heat supply time is prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of solar thermal collection and heating, and in particular relates to a solar thermal collection and heating system and method. Background Art

[0002] The population density in remote and high-altitude areas is low, and the distribution of personnel activity areas such as residential houses and military barracks is relatively scattered. It is inconvenient to use electric heating, and it is difficult for the power grid and heat network to effectively cover the corresponding areas, which has a great impact on life and work.

[0003] The related technology uses solar thermal collection to ensure heating for daily life. However, due to the limitation of sunlight exposure time, there is insufficient light or insufficient heating at night, and the heating time is short, which makes it difficult to meet the heating demand. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] The inventors realized that barracks arranged in remote areas have difficulty in transporting coal resources, the power grid is difficult to reach the corresponding area, or after a power grid failure, heating is more dependent on solar energy collection and heating. If energy storage and heat accumulation cannot be carried out during periods of sufficient sunlight, it will be difficult to meet the heating needs.

[0006] The inventors also realized that the light intensity varies during the effective light hours throughout the day, and the solar heat collection and heating startup phases run slowly, affecting the demand for heating.

[0007] To this end, an embodiment of the present invention proposes a solar thermal collection and heating system that can improve the thermal energy storage effect and the solar thermal heating duration.

[0008] The embodiment of the present invention further provides a solar thermal collection and heating method.

[0009] The solar thermal collection and heating system of the embodiment of the present invention comprises a heat collection unit, a heat supply unit and a hot water storage tank, wherein the heat collection unit and the heat supply unit are both connected to the hot water storage tank, the heat collection unit is used to collect the heat energy of sunlight and store the heat energy in the hot water storage tank, and the heat supply unit is used to transport the heat energy in the hot water storage tank to the thermal load equipment;

[0010] The hot water storage tank comprises:

[0011] A box body, wherein the box body has an inner cavity;

[0012] a first plate and a second plate, the first plate and the second plate being arranged in the inner cavity to separate the inner cavity into a first chamber and a second chamber, one of the first plate and the second plate being movable relative to the other to adjust the size of the first chamber and the second chamber, at least one of the first plate and the second plate being provided with a first hole and a first valve, the first hole being used to connect the first chamber and the second chamber, and the first valve being used to control the opening and closing of the first hole;

[0013] A first inlet, a first outlet, a second inlet and a second outlet are arranged on the box body and communicated with the first chamber, the first inlet and the first outlet are connected to the heat collecting unit, and the second inlet and the second outlet are connected to the heat supply unit.

[0014] The solar thermal collection and heating system of the embodiment of the present invention utilizes a thermal collection unit to store the heat energy of sunlight in a hot water storage tank, and can change the volume of the working fluid in the first chamber by changing the size of the space of the first chamber, change the amount of heat storage, and ensure the heating time of the heating unit. In the initial stage of solar thermal collection and heating startup, the embodiment of the present invention can reduce the volume of the working fluid in the first chamber to speed up the startup of solar thermal collection and heating. When the light intensity is sufficient, it can increase the volume of the working fluid in the first chamber to achieve energy storage and heat storage, and store more heat, which can extend the heating time when the light intensity is insufficient or at night.

[0015] In some embodiments, the heat collection unit includes a heat collector, a first heat exchanger, a first pump, and a second pump that are interconnected. The heat collector, the first heat exchanger, and the first pump are connected through a first pipeline so that a first working medium circulates between the heat collector and a hot side of the first heat exchanger. The first heat exchanger, the hot water storage tank, and the second pump are connected through a second pipeline so that a second working medium circulates between the hot water storage tank and a cold side of the first heat exchanger. The first working medium and the second working medium perform heat exchange in the first heat exchanger.

[0016] The heating unit includes a third pipeline and a third pump. The hot water storage tank, the third pump and the thermal load device are connected through the third pipeline so that the second working medium circulates between the hot water storage tank and the thermal load device.

[0017] In some embodiments, the solar thermal collection heating system further comprises a heat meter, and the first pipeline, the second pipeline and the third pipeline are all provided with the heat meter;

[0018] And / or, the solar thermal collection and heating system further comprises an expansion tank and a liquid replenishing component, wherein the expansion tank is connected to the first pipeline, and the liquid replenishing component is connected to the first pipeline to replenish the first working fluid into the thermal collection unit;

[0019] And / or, the solar thermal collection heating system also includes a fourth pipeline, and the water outlet end of the cold side of the first heat exchanger and the water inlet end of the thermal load, and the water inlet end of the cold side of the first heat exchanger and the water outlet end of the thermal load are connected by the fourth pipeline.

[0020] In some embodiments, the solar thermal heating system also includes a hot water unit, which includes a heat exchange coil, a fifth pipeline and a sixth pipeline. The heat exchange coil is located in the first room, and the water inlet of the heat exchange coil and the water source, and the water outlet of the heat exchange coil and the domestic water equipment are connected through the fifth pipeline. The sixth pipeline is connected between the fifth pipeline at the inlet end of the heat exchange coil and the fifth pipeline at the outlet end of the heat exchange coil, and a fourth pump is provided on the sixth pipeline.

[0021] In some embodiments, the box body has a first insulation layer, the first insulation layer is formed by polyurethane foam, the thickness of the first insulation layer is 15mm to 45mm, and the density of the first insulation layer is 41kg / m 3 Up to 45kg / m 3 , the closed porosity of the first thermal insulation layer is not less than 96%;

[0022] And / or, the inner cavity of the box body is a cylindrical cavity, the lengths of the first plate and the second plate both extend along the axial direction of the inner cavity and abut against the axial end faces of the inner cavity, the first plate is fixedly connected to the box body, and the second plate is rotatably connected to the box body; one end of the first plate in the width direction and one end of the second plate in the width direction are close to the middle of the inner cavity and abut against each other, the other end of the first plate in the width direction and the other end of the second plate in the width direction abut against the radial side wall of the inner cavity, and the cross-sections of the first chamber and the second chamber are both fan-shaped.

[0023] In some embodiments, the solar thermal collection heating system further comprises a first driving unit, the first driving unit is connected to the second plate and is used to drive the second plate to rotate relative to the box body, and the first driving unit is linked to the first valve;

[0024] And / or, the first hole is provided at a lower portion of the first plate and / or the second plate, and the number of the first holes is plural;

[0025] And / or, the first plate and the second plate both include a shell and a second thermal insulation layer, and the second thermal insulation layer is filled in the shell;

[0026] And / or, the volume of the first chamber is greater than the volume of the second chamber.

[0027] In some embodiments, the hot water storage tank further includes a first heat storage component, the first heat storage component having an outer shell and a phase change medium filled in the outer shell, the first heat storage component is arranged in the first chamber, the outer shell has a first surface close to the second chamber and a second surface away from the second chamber, a first area is formed between the first surface and the first plate and the second plate, and a second area is formed between the second surface and the wall of the inner cavity.

[0028] In some embodiments, the thermal conductivity of the first surface is greater than the thermal conductivity of the second surface;

[0029] And / or, the first heat storage assembly is located at the upper part of the first chamber, and the distance between the lower end of the first heat storage assembly and the bottom surface of the first chamber is 400 mm to 1200 mm;

[0030] And / or, the first heat storage component is arranged obliquely relative to the axial direction of the inner cavity, and the distance between the lower end of the first heat storage component and the second chamber is smaller than the distance between the upper end of the first heat storage component and the second chamber;

[0031] And / or, the first inlet and the second outlet are arranged in communication with the first region, the first outlet is arranged in communication with the second region, and the second inlet is arranged in communication with the lower part of the first chamber;

[0032] And / or, the first surface is an inner concave arc surface, and the second surface is an outer convex arc surface.

[0033] In some embodiments, the solar thermal collection heating system further comprises a seventh pipeline, one end of which is connected to a water source and the other end of which is connected to the second chamber, and the seventh pipeline is used to replenish water into the inner cavity;

[0034] And / or, the solar thermal collection and heating system further comprises an electric heating component, wherein the electric heating component is arranged at the lower part of the inner cavity, and the number of the electric heating components is plural.

[0035] The solar thermal collection and heating method of the embodiment of the present invention utilizes the above-mentioned solar thermal collection and heating system to collect heat and provide heat, and specifically includes the following steps:

[0036] Acquiring the temperatures of a plurality of temperature measuring points in the solar thermal collection heating system;

[0037] Determine whether the temperature of the working medium in the heat collector of the heat collection unit is greater than a first threshold, and whether the difference between the temperature of the working medium in the heat collector of the heat collection unit and the temperature of the working medium in the first chamber of the hot water storage tank is greater than a second threshold;

[0038] If yes, start the heat collection unit;

[0039] Determining whether the temperature of the working medium in the first chamber of the hot water storage tank is greater than a third threshold and the temperature in the chamber is less than a fourth threshold;

[0040] If yes, start the heating unit;

[0041] Determine whether the temperature of the working medium in the heat collector of the heat collection unit and the temperature of the working medium in the first chamber of the hot water storage tank are both greater than a fifth threshold, and the fifth threshold is greater than the third threshold;

[0042] If yes, adjusting the relative movement of the first plate and the second plate to increase the volume of the first chamber;

[0043] Determine whether the difference between the temperature of the working medium in the heat collector of the heat collection unit and the temperature of the working medium in the first chamber of the hot water storage tank is less than a second threshold, and whether the temperature of the working medium in the first chamber of the hot water storage tank is less than a sixth threshold, and the sixth threshold is less than or equal to the third threshold;

[0044] If so, the first plate and the second plate are adjusted to move relative to each other to reduce the volume of the first chamber, and the electric heating component is started. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 Schematic diagram of a solar thermal heating system according to an embodiment of the present invention.

[0046] Figure 2 It is a schematic structural diagram of a hot water storage tank according to an embodiment of the present invention.

[0047] Figure 3 It is a schematic diagram of the arrangement of the first heat storage assembly and the hot water storage tank in the axial direction of an embodiment of the present invention.

[0048] Figure 4 It is a schematic diagram of the unfolded structure of the tank body of the hot water storage tank according to an embodiment of the present invention.

[0049] Figure 5 It is a schematic diagram of a solar thermal heating system according to another embodiment of the present invention.

[0050] Reference numerals:

[0051] 100, heat collection unit; 101, heat collector; 102, first heat exchanger; 103, first pump; 104, second pump; 105, first pipeline; 106, second pipeline; 107, expansion tank; 108, liquid replenishing component;

[0052] 200, heating unit; 201, third pump; 202, third pipeline; 203, fourth pipeline; 204, thermal load equipment;

[0053] 300. Hot water storage tank;

[0054] 401, heat exchange coil; 402, fifth pipeline; 403, sixth pipeline; 404, water inlet; 405, water outlet; 406, fourth pump;

[0055] 1. Box body; 11. Inner cavity; 12. First insulation layer; 13. First chamber; 131. First area; 132. Second area; 14. Second chamber;

[0056] 21. first plate; 211. shell; 212. second heat-insulating layer; 22. second plate; 23. first driving part; 24. first hole;

[0057] 3. first heat storage component; 31. housing; 311. first surface; 312. second surface; 32. phase change medium;

[0058] 41, first inlet; 42, first outlet; 43, second inlet; 44, second outlet; 45, third inlet; 46, seventh pipeline;

[0059] 5. Electric heating components. DETAILED DESCRIPTION

[0060] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0061] The following combination Figure 1-Figure 5 The embodiments of the present invention are described in detail.

[0062] like Figure 1-Figure 4 As shown, the solar thermal collection and heating system of an embodiment of the present invention includes a heat collection unit 100, a heating unit 200 and a hot water storage tank 300. The heat collection unit 100 and the heating unit 200 are both connected to the hot water storage tank 300. The heat collection unit 100 is used to collect the thermal energy of sunlight and store the thermal energy in the hot water storage tank 300. The heating unit 200 is used to transport the thermal energy in the hot water storage tank 300 to the thermal load equipment 204.

[0063] The hot water storage tank 300 includes a tank body 1, a first plate 21 and a second plate 22. The tank body 1 has an inner cavity 11. The first plate 21 and the second plate 22 are arranged in the inner cavity 11 to separate the inner cavity 11 into a first chamber 13 and a second chamber 14. One of the first plate 21 and the second plate 22 is movable relative to the other to adjust the size of the first chamber 13 and the second chamber 14. At least one of the first plate 21 and the second plate 22 is provided with a first hole 24 and a first valve. The first hole 24 is used to connect the first chamber 13 and the second chamber 14. The first valve is used to control the opening and closing of the first hole 24.

[0064] The box body 1 is also provided with a first inlet 41, a first outlet 42, a second inlet 43 and a second outlet 44 which are connected to the first chamber 13. The first inlet 41 and the first outlet 42 are connected to the heat collecting unit 100, and the second inlet 43 and the second outlet 44 are connected to the heating unit 200. For the heating unit 100, the working fluid in the first chamber 13 flows out through the first outlet 42 and then flows to the heat collecting unit 100 to absorb heat and increase temperature, and then flows back into the first chamber 13 through the first inlet 41. For the heating unit 200, the working fluid in the first chamber 13 flows out through the first outlet 42 and then flows to the heating unit 200 to release heat and decrease temperature, and then flows back into the first chamber 13 through the first inlet 41. Figure 4 A schematic diagram of the structure of the box body unfolded from A and B is shown in FIG. 1 , showing the positions of different inlets and outlets on the box body.

[0065] The heat storage tank 300 realizes the functions of energy storage and buffering, ensures the continuous and stable operation of the system, and can effectively extend the heating time.

[0066] The first plate 21 and the second plate 22 in the embodiment of the present invention are in the inner cavity 11, dividing the inner cavity 11 into a first chamber 13 and a second chamber 14 of variable volume. When the volume of the first chamber 13 increases, the volume of the corresponding second chamber 14 decreases. When the volume of the second chamber 14 increases, the volume of the first chamber 13 decreases accordingly. The embodiment of the present invention can change the volume of the working fluid in the first chamber 13 by changing the space size of the first chamber 13. In the initial stage of solar thermal collection and heating, the volume of the working fluid in the first chamber 13 can be reduced to increase the temperature of the working fluid in the first chamber 13 more quickly, thereby accelerating the start-up speed of solar thermal collection and heating. When the light intensity is sufficient, the volume of the working fluid in the first chamber 13 can be increased to achieve energy storage and heat storage, thereby increasing the heating time.

[0067] Specifically, in the embodiment of the present invention, during the startup stage of solar thermal collection and heating, such as the stage when the sun has just risen, the volume of the first chamber 13 is reduced, and the volume of the working fluid in the first chamber 13 is reduced, so that relatively less working fluid participates in the heat collection cycle, so that the temperature of the working fluid in the first chamber 13 is increased to a temperature suitable for heating as soon as possible, such as 40 degrees Celsius, and the heating is started.

[0068] When there is sufficient sunlight, for example, after the sun rises and for several hours around 14:20 local true solar time, the temperature of the working fluid in the first chamber 13 is relatively high. At this time, the volume of the first chamber 13 can be increased to increase the volume of the working fluid in the first chamber 13, so as to store more heat for use when there is insufficient sunlight or no sunlight, thereby extending the heating time.

[0069] The first hole 24 is used to allow the working fluid to flow between the first chamber 13 and the second chamber 14. When it is necessary to increase the volume of the first chamber 13 and reduce the volume of the second chamber 14, the working fluid in the second chamber 14 will flow into the first chamber 13 through the first hole 24. When the adjustment is completed, the first valve is closed. At this time, the first chamber 13 and the second chamber 14 are relatively independent, and the working fluids in the first chamber 13 and the second chamber 14 are basically isolated, and no convective heat exchange is performed.

[0070] The solar thermal collection and heating system of the embodiment of the present invention utilizes the thermal collection unit 100 to store the thermal energy of sunlight in the hot water storage tank 300, and can change the volume of the working fluid in the first chamber 13 by changing the space size of the first chamber 13, change the heat storage amount, and ensure the heating time of the heating unit 200. In the initial stage of solar thermal collection and heating startup, the embodiment of the present invention can reduce the volume of the working fluid in the first chamber 13 to speed up the startup of solar thermal collection and heating. When the light intensity is sufficient, the volume of the working fluid in the first chamber 13 can be increased to achieve energy storage and heat storage, and more heat can be stored, so that the heating time can be extended when the light intensity is insufficient or at night.

[0071] like Figure 5 As shown, in some embodiments, the heat collection unit 100 includes a connected collector 101, a first heat exchanger 102, a first pump 103 and a second pump 104. The collector 101, the first heat exchanger 102 and the first pump 103 are connected by a first pipeline 105 so that the first working fluid circulates between the heat collector 101 and the hot side of the first heat exchanger 102. The first heat exchanger 102, the hot water storage tank 300 and the second pump 104 are connected by a second pipeline 106 so that the second working fluid circulates between the hot water storage tank 300 and the cold side of the first heat exchanger 102. The first working fluid and the second working fluid perform heat exchange in the first heat exchanger 102.

[0072] The collector 101 can be a flat plate collector 101, the first heat exchanger 102 can be a plate heat exchanger, the first working medium can be an antifreeze, and the second working medium can be water. The antifreeze can effectively adapt to the ambient temperature in the high-cold area, prevent the pipes arranged outdoors from freezing, and play an antifreeze effect. The box 1 stores energy through water.

[0073] During the heat collection process, the antifreeze liquid circulates on the hot side of the collector 101 and the first heat exchanger 102. The antifreeze liquid absorbs the heat energy of sunlight to increase its temperature when passing through the collector 101. The antifreeze liquid releases heat to cool down when passing through the first heat exchanger 102, and heats the water on the cold side of the first heat exchanger 102. The water circulates between the hot water storage tank 300 and the cold side of the first heat exchanger 102, and the first working fluid and the second working fluid in the first heat exchanger 102 continuously exchange heat, so that the water in the first chamber 13 can gradually increase in temperature to achieve energy storage and heat storage.

[0074] The heating unit 200 includes a third pipeline 202 and a third pump 201 . The hot water storage tank 300 , the third pump 201 and the thermal load device 204 are connected through the third pipeline 202 , so that the second working medium circulates between the hot water storage tank 300 and the thermal load device 204 .

[0075] The third pump 201 extracts hot water from the first chamber 13 and delivers it to the thermal load equipment 204, such as floor heating, radiators, fan coil units and other thermal load equipment 204. The hot water releases heat, cools down, and flows back to the first chamber 13 to achieve heating.

[0076] Furthermore, the solar thermal collection heating system also includes a heat meter, and the first pipeline 105, the second pipeline 106 and the third pipeline 202 are all provided with a heat meter.

[0077] The heat energy meter includes a thermometer, a pressure gauge, a flow meter, etc., which are used to detect the heat absorption of the heat collection unit 100 and the heat release of the heat supply unit 200, improve the detection effect of the system, facilitate the adjustment of different heating modes, help optimize the heat collection and heating process, and improve the utilization rate of heat.

[0078] For example, by detecting the amount of heat absorbed by the heat collection unit 100 and the amount of heat released by the heat supply unit 200, the size of the first chamber 13 can be adjusted more reasonably to facilitate energy storage.

[0079] Furthermore, the solar thermal heating system further includes an expansion tank 107 and a liquid replenishing component 108 . The expansion tank 107 is connected to the first pipeline 105 . The liquid replenishing component 108 is in communication with the first pipeline 105 to replenish the first working fluid into the thermal collection unit 100 .

[0080] The expansion tank 107 can be used to compensate for the thermal expansion of the working fluid due to the temperature rise, and can also remove the gas in the working fluid to ensure the stability of the fluid in the system and the heat exchange efficiency. The liquid replenishing component 108 can replenish the heat collecting unit 100 in time when the first working mass is insufficient, so as to avoid poor heat exchange effect of the working fluid due to the reduction of the working mass.

[0081] In some embodiments, the solar thermal heating system also includes a fourth pipeline 203, and the water outlet end of the cold side of the first heat exchanger 102 and the water inlet end of the thermal load, and the water inlet end of the cold side of the first heat exchanger 102 and the water outlet end of the thermal load are connected by the fourth pipeline 203.

[0082] That is, a circulation loop can be directly formed between the cold side of the first heat exchanger 102 and the thermal load device 204, so that the second working medium flows in the circulation loop, and under some working conditions, it does not need to pass through the hot water storage tank 300.

[0083] For example, at the initial start-up of the heat collection unit 100 and the heating unit 200, when the heat absorbed by the heat collector 101 is not enough to quickly heat the second working medium in the first chamber 13 to a preset temperature, the circulation loop between the cold side of the first heat exchanger 102 and the thermal load device 204 can be directly connected to increase the start-up speed of the heating unit 200. After the heat absorbed by the heat collection unit 100 increases, the flow between the cold side of the first heat exchanger 102 and the hot water storage tank 300 is adjusted, and part of the heat is used to heat the second working medium in the hot water storage tank 300.

[0084] For another example, after the temperature of the second working fluid in the hot water storage tank 300 reaches a preset temperature, the heat storage capacity tends to be saturated, and the circulation loop between the cold side of the first heat exchanger 102 and the thermal load device 204 can be directly connected, so that sufficient high-quality thermal energy is stored in the hot water storage tank 300.

[0085] For another example, since the temperature of the second working fluid returned by the thermal load device 204 is relatively low, the second working fluid returned by the thermal load device 204 can flow directly to the cold side of the first heat exchanger 102 without first flowing to the hot water storage tank 300, thereby increasing the temperature difference between the cold side and the hot side of the first heat exchanger 102, improving the heat exchange rate, and ensuring high-quality thermal energy in the hot water storage tank 300.

[0086] In some embodiments, the solar thermal heating system also includes a hot water unit, which includes a heat exchange coil 401, a fifth pipeline 402 and a sixth pipeline 403. The heat exchange coil 401 is located in the first chamber 13. The water inlet 404 of the heat exchange coil 401 and the water source, and the water outlet 405 of the heat exchange coil 401 and the domestic water equipment are connected through the fifth pipeline 402. The sixth pipeline 403 is connected between the fifth pipeline 402 at the inlet end of the heat exchange coil 401 and the fifth pipeline 402 at the outlet end of the heat exchange coil 401. A fourth pump 406 is provided on the sixth pipeline 403.

[0087] The heat exchange coil 401 is arranged in the first chamber 13, which can separate the water in the hot water unit from the second working medium in the first chamber 13 to ensure the water quality of each. Domestic water equipment includes equipment for domestic hot water such as washing clothes, washing face, and washing hands.

[0088] The water from the water source flows into the heat exchange coil 401 through the fifth pipe 402 . After the water in the heat exchange coil 401 absorbs heat and rises in temperature, it flows to the faucet through the fifth pipe 402 at the outlet end of the heat exchange coil 401 .

[0089] The embodiment of the present invention is provided with a sixth pipeline 403, and the sixth pipeline 403, a partial section of the fifth pipeline 402 at the inlet end of the heat exchange coil 401, a partial section of the fifth pipeline 402 at the outlet end of the heat exchange coil 401, and the heat exchange coil 401 form a circulation loop. The fourth pump 406 can drive the water in the circulation loop to circulate, thereby ensuring the temperature of the water in the circulation loop. When the faucet is turned on to use water, the output of cold water is reduced, water is saved, and comfort is improved.

[0090] In some embodiments, the box body has a first insulation layer, the first insulation layer is formed by polyurethane foam, the thickness of the first insulation layer is 15mm to 45mm, and the density of the first insulation layer is 41kg / m 3 Up to 45kg / m 3 , the closed porosity of the first thermal insulation layer is not less than 96%.

[0091] Specifically, the thickness of the first thermal insulation layer can be 15 mm, 18 mm, 20 mm, 23.5 mm, 28 mm, 30 mm or 45 mm. When the thickness of the first thermal insulation layer is too thin, less than 15 mm, it cannot meet the thermal insulation performance requirements, resulting in excessive heat loss. When the thickness of the first thermal insulation layer is too thick, greater than 45 mm, the thermal insulation layer is too thick, which increases the cost and the volume of the box, and also affects the stability of the entire structure.

[0092] The density of the first insulation layer can be 41kg / m 3 , 42kg / m 3 , 43.6kg / m 3 or 45kg / m 3 By designing the thickness, density and closed-pore ratio of the first insulation layer, the insulation layer can be prevented from shrinking and deforming at minus 45 degrees Celsius, thereby adapting to the environmental requirements of high-cold areas, ensuring the structural stability of the box, and extending the overall service life.

[0093] In some embodiments, the inner cavity 11 of the box body 1 is a cylindrical cavity, the lengths of the first plate 21 and the second plate 22 extend along the axial direction of the inner cavity 11 and abut against the axial end faces of the inner cavity 11, the first plate 21 is fixedly connected to the box body 1, and the second plate 22 is rotatably connected to the box body 1; one end of the first plate 21 in the width direction and one end of the second plate 22 in the width direction are close to the middle of the inner cavity 11 and abut against each other, the other end of the first plate 21 in the width direction and the other end of the second plate 22 in the width direction abut against the radial side wall of the inner cavity 11, and the cross-sections of the first chamber 13 and the second chamber 14 are both fan-shaped.

[0094] Specifically, both ends of the first plate 21 and the second plate 22 in the length direction are abutted against the axial end surface of the inner cavity 11, one end of the first plate 21 and one end of the second plate 22 in the width direction are abutted against the radial side wall in the circumferential direction of the inner cavity 11, and the other end of the first plate 21 and the other end of the second plate 22 in the width direction are close to the middle of the inner cavity 11 and abutted against each other.

[0095] It should be understood that three of the four side edges of the first plate 21 are respectively abutted and fixedly sealed against the top, bottom and side wall surfaces of the box body 1, and the fourth side edge of the first plate 21 is located in the middle of the inner cavity 11; three of the four side edges of the second plate 22 are respectively abutted and sealed against the top, bottom and side wall surfaces of the box body 1, and the fourth side edge of the second plate 22 is located in the middle of the inner cavity 11, and the top and bottom of the fourth side edge of the second plate 22 are rotatably connected to the box body 1, so that the second plate 22 is rotatable relative to the box body 1 and the first plate 21.

[0096] When the second plate 22 rotates clockwise or counterclockwise, the volume of the first chamber 13 may be increased or decreased.

[0097] In some embodiments, the solar thermal collection and heating system further includes a first driving unit 23, which is connected to the second plate 22 and is used to drive the second plate 22 to rotate relative to the box body 1, and the first driving unit 23 is linked to the first valve.

[0098] The first driving part 23 includes a driving motor and a reducer, the output end of the driving motor is connected to the reducer, and the output end of the reducer is connected to the rotating shaft between the second plate 22 and the box 1. When the driving motor rotates, it can drive the second plate 22 to rotate. When the first driving part 23 is in motion, the first valve is opened synchronously, and when the first driving part 23 stops, the first valve is stopped synchronously.

[0099] The driving motor is a servo motor.

[0100] Further, the first holes 24 are provided at the lower part of the first plate 21 and / or the second plate 22 , and there are a plurality of first holes 24 .

[0101] The provision of multiple first holes 24 can reduce the resistance when the second plate 22 rotates, and ensure that the fluid between the first chamber 13 and the second chamber 14 can flow relatively evenly when the second plate 22 rotates. The number of first holes 24 can be 2, 4, 5 or 7.

[0102] In some embodiments, the first plate 21 and the second plate 22 both include a shell 211 and a second thermal insulation layer 212 , and the second thermal insulation layer 212 is filled in the shell 211 .

[0103] In the embodiment of the present invention, by providing the second insulation layer 212 in the first plate 21 and the second plate 22 , the working fluids in the first chamber 13 and the second chamber 14 can be relatively independent, thereby reducing the heat exchange between the working fluids.

[0104] The second thermal insulation layer 212 can be made of the same material and have the same properties as the first thermal insulation layer 12 .

[0105] Furthermore, the volume of the first chamber 13 is greater than the volume of the second chamber 14. The working medium in the first chamber 13 is used as a circulating fluid for heat collection and heat supply, so at least half of the space in the box body 1 needs to be used as the first chamber 13, that is, within the movement range of the second plate 22, the minimum volume of the first chamber 13 needs to be greater than the maximum volume of the second chamber 14.

[0106] In some embodiments, the hot water storage tank 300 further includes a first heat storage component 3, the first heat storage component 3 having an outer shell 31 and a phase change medium 32 filled in the outer shell 31, the first heat storage component 3 is arranged in the first chamber 13, the outer shell 31 has a first surface 311 close to the second chamber 14 and a second surface 312 away from the second chamber 14, a first area 131 is formed between the first surface 311 and the first plate 21 and the second plate 22, and a second area 132 is formed between the second surface 312 and the wall surface of the inner cavity 11.

[0107] The first heat storage component 3 is used to absorb heat and store energy when the working medium temperature in the first chamber 13 is high, and release heat when the working medium temperature in the first chamber 13 is low. Therefore, the first heat storage component 3 can absorb more heat for energy storage by using the phase change medium 32 when there is sufficient light, and can extend the heating time by releasing heat when there is insufficient light.

[0108] The embodiment of the present invention further divides the space in the first chamber 13 through the shell 31 of the first heat storage assembly 3, which can more reasonably plan the positions of different fluids entering and exiting the first chamber 13, more efficiently realize energy utilization, and improve heat utilization rate.

[0109] In some embodiments, the thermal conductivity of the first surface 311 is greater than the thermal conductivity of the second surface 312 .

[0110] The embodiment of the present invention designs the thermal conductivity of the first surface 311 and the second surface 312 of the shell 31 so that the thermal conductivity of the first surface 311 is larger, which enables more effective heat exchange between the phase-changing medium and the working medium in the first area 131 and improves the utilization rate of heat.

[0111] In some embodiments, the first heat storage component 3 is located at the upper part of the first chamber 13, and the distance between the lower end of the first heat storage component 3 and the bottom surface of the first chamber 13 is 400 mm to 1200 mm, which can avoid the unreasonable problem of energy storage and energy release of the first heat storage component 3 due to temperature stratification in the first chamber 13. When releasing energy, the working fluid in the first area 131 can be better heated, thereby improving the utilization rate of heat.

[0112] The spacing distance between the lower end of the first heat storage component 3 and the bottom surface of the first chamber 13 can be 400mm, 550mm, 670mm, 1000mm or 1200mm. When the spacing distance is too small and less than 400mm, the first heat storage component 3 has a greater contact with the low-temperature working medium at the bottom of the first chamber 13. When the spacing distance is too large and greater than 1200mm, the volume and heat storage capacity of the first heat storage component 3 are affected.

[0113] In some embodiments, the first inlet 41 and the second outlet 44 are arranged in communication with the first region 131 , the first outlet 42 is arranged in communication with the second region 132 , and the second inlet 43 is arranged in communication with the lower portion of the first chamber 13 .

[0114] The heat collecting unit 100 is used to heat the working fluid in the first chamber 13, and the thermal load device 204 takes heat from the working fluid in the first chamber 13. Therefore, by setting the positions of different inlets and outlets, the fluid in the first chamber 13 presents stratified and directional flow, which can more efficiently utilize the internal heat.

[0115] Due to the different temperatures, the density of the working fluid will also change, resulting in the colder working fluid having a higher density and sinking to the bottom of the box 1, while the hotter working fluid having a lower density and floating on the top of the box 1, thereby forming a temperature stratification. Therefore, in the embodiment of the present invention, the second inlet 43 is arranged at the lower part of the first chamber 13, and the first inlet 41, the first outlet 42 and the second outlet 44 are arranged at the upper part of the first chamber 13 to achieve temperature stratification. Furthermore, in the embodiment of the present invention, the first inlet 41 and the second outlet 44 are arranged at the first area 131, and the first outlet 42 is arranged at the second area 132, which can promote the directional flow of the fluid in the upper part of the first chamber 13, and improve the utilization rate of high-quality heat and the heat collection efficiency.

[0116] In some embodiments, the first surface 311 is an inwardly concave arc surface, and the second surface 312 is an outwardly convex arc surface. In the embodiment of the present invention, by designing the first surface 311 and the second surface 312 as arc surfaces, the first surface 311 is an inwardly concave arc surface, and the second surface 312 is an outwardly convex arc surface, the internal space of the second chamber 14 can be more effectively utilized, and the volumes of the first area 131 and the second area 132 can be reasonably planned, and at the same time, it can play a guiding role, so that the working medium in the first chamber 13 flows more smoothly.

[0117] In some embodiments, the first heat storage assembly 3 is arranged obliquely relative to the axial direction of the inner cavity 11 , and the distance between the lower end of the first heat storage assembly 3 and the second chamber 14 is smaller than the distance between the upper end of the first heat storage assembly 3 and the second chamber 14 .

[0118] That is to say, Figure 3 The angle X between the extension direction of the first heat storage component 3 and the axial direction of the inner cavity 11 is shown in the figure. After the first heat storage component 3 is tilted, the spatial volume of the first area 131 can be gradually increased from the bottom to the top. The smaller bottom space can prevent the lower temperature fluid at the bottom from flowing to the first area 131. Correspondingly, the spatial volume of the second area 132 gradually decreases from the bottom to the top. The larger bottom space can prevent the lower temperature fluid from flowing to the second area 132, and also facilitate the fluid in the second area 132 to flow to the collector 101 to collect heat. The embodiment of the present invention realizes the three-dimensional flow of fluid and improves the utilization rate of heat.

[0119] In some embodiments, the solar thermal heating system further includes a seventh pipeline 46 , one end of which is connected to a water source and the other end of which is connected to the second chamber 14 . The seventh pipeline 46 is used to replenish water into the inner cavity 11 .

[0120] The seventh pipeline 46 is used to add water to the inner cavity 11. When the working fluid in the inner cavity 11 is insufficient, water can be added to the inner cavity 11 through the seventh pipeline 46, and water can be added to the second chamber 14, thereby reducing the temperature impact on the working fluid in the first chamber 13. At this time, the first valve can be opened, and the principle of the communicating vessel can be used to make the working fluid levels in the first chamber 13 and the second chamber 14 rise at the same time.

[0121] A third inlet 45 is disposed at the top of the second chamber 14 , and a seventh pipeline 46 is connected to the third inlet 45 . The cold water replenished into the inner cavity 11 is located at the top of the second chamber 14 .

[0122] In some embodiments, the solar thermal collection and heating system further includes an electric heating component 5 , which is disposed at the lower portion of the inner cavity 11 , and there are multiple electric heating components 5 .

[0123] In the embodiment of the present invention, an electric heating component 5 is arranged in the inner cavity 11, so that the internal working fluid can be heated by the electric heating component 5. On the one hand, the startup speed is improved during the startup phase of heat collection and heat supply. On the other hand, electric heating can be used to provide heating when solar energy is insufficient, thereby improving practicality.

[0124] The electric heating component 5 may be an electric heating tube arranged in the inner cavity 11 , and the number of the electric heating components 5 may be 2, 3, 5 or 6.

[0125] The solar energy heat collection and heating method of the embodiment of the present invention utilizes the solar energy heat collection and heating system of the above embodiment to collect heat and provide heat, and specifically comprises the following steps:

[0126] S101, obtaining the temperatures of multiple temperature measurement points in the solar thermal heating system. Specifically, the temperature measurement points include the working fluid temperature at the collector outlet, the working fluid temperature at multiple locations in the first room, the indoor temperature, and may also include the working fluid temperature at the collector inlet, the working fluid temperature transported to the thermal load device, the working fluid temperature returned from the thermal load device to the first room, etc.

[0127] By measuring different temperature points, we can better understand the situation of the solar thermal heating system, so as to cope with the adjustment of different working conditions and operating modes.

[0128] S102, determining whether the temperature of the working medium in the heat collector of the heat collection unit is greater than a first threshold, and whether the difference between the temperature of the working medium in the heat collector of the heat collection unit and the temperature of the working medium in the first chamber of the hot water storage tank is greater than a second threshold.

[0129] The working fluid temperature in the collector can be understood as the working fluid temperature at the collector outlet. When the collector can absorb the heat in the sunlight and heat the working fluid to the first threshold, it meets the conditions for heat collection.

[0130] Since the first heat exchanger requires a certain temperature difference, the working fluid temperature in the first chamber and the working fluid temperature in the collector need to have a certain difference, so that effective heat exchange can be carried out and the heat collection unit can be started.

[0131] Optionally, the first threshold is not less than 40 degrees Celsius, and the second threshold is not less than 2 degrees Celsius.

[0132] S103: If yes, start the heat collection unit. When the temperature of the working medium in the heat collector of the heat collection unit is greater than the first threshold, and the difference between the temperature of the working medium in the heat collector of the heat collection unit and the temperature of the working medium in the first chamber of the hot water storage tank is greater than the second threshold, the heat collection unit is started.

[0133] S104, determining whether the temperature of the working medium in the first chamber of the hot water storage tank is greater than a third threshold and the indoor temperature is less than a fourth threshold.

[0134] In order to ensure effective heating, it is necessary that the working medium temperature in the first chamber of the hot water storage tank reaches a third threshold and the indoor temperature is less than a fourth threshold.

[0135] The third threshold is not less than 40 degrees Celsius, and the fourth threshold is not greater than 20 degrees Celsius.

[0136] For example, when the working medium temperature in the first chamber of the hot water storage tank is greater than 40 degrees Celsius and the indoor temperature is less than 20 degrees Celsius, heating can be provided.

[0137] For another example, when the working medium temperature in the first chamber of the hot water storage tank is 35 degrees Celsius and the indoor temperature is 18 degrees Celsius, the heating is not started, and the heating is started after the working medium temperature in the first chamber reaches 40 degrees Celsius.

[0138] S105: If yes, start the heating unit. After the condition of S104 is met, start the heating unit to supply heat.

[0139] S106: Determine whether the temperature of the working medium in the heat collector of the heat collection unit and the temperature of the working medium in the first chamber of the hot water storage tank are both greater than a fifth threshold, and the fifth threshold is greater than the third threshold.

[0140] After the collector absorbs the heat from the solar tube and the working fluid temperature in the collector reaches the fifth threshold, and the working fluid temperature in the existing first chamber reaches the fifth threshold, the heat storage capacity of the hot water tank is increased by increasing the space size and working fluid volume of the first chamber to increase the heat storage amount.

[0141] Optionally, the fifth threshold is not less than 50 degrees Celsius.

[0142] S107: If yes, adjust the relative movement of the first plate and the second plate to increase the volume of the first chamber.

[0143] When the condition of S106 is met, the second plate is driven to move by the first driving unit to adjust the space of the first chamber, and the volume of the working fluid in the first chamber is increased, thereby absorbing and storing more heat.

[0144] S108. Determine whether the difference between the temperature of the working fluid in the collector of the heat collection unit and the temperature of the working fluid in the first chamber of the hot water storage tank is less than a second threshold, and whether the temperature of the working fluid in the first chamber of the hot water storage tank is less than a sixth threshold, and the sixth threshold is less than or equal to the third threshold.

[0145] When the difference between the temperature of the working fluid in the collector of the thermal collection unit and the temperature of the working fluid in the first chamber of the hot water storage tank is less than the second threshold, the thermal collection unit cannot work. When the temperature of the working fluid in the first chamber of the hot water storage tank is less than the sixth threshold, the heating unit cannot achieve effective heating. At this time, it is necessary to adjust the volume of the working fluid in the first chamber and start electric heating to assist heating.

[0146] Optionally, the sixth threshold is 35 degrees Celsius to 40 degrees Celsius.

[0147] S109, if yes, adjust the relative movement of the first plate and the second plate to reduce the volume of the first chamber, and start the electric heating component.

[0148] When the conditions of S108 are met, the space size of the first chamber is reduced, the volume of the working fluid in the first chamber is reduced, and then the electric heating component is started to heat the working fluid in the first chamber. When the working fluid in the first chamber reaches the third threshold, electric heating can be used to assist in heating to ensure continuous heating.

[0149] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0150] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0151] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0152] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0153] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0154] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A solar thermal heating system, characterized in that: It includes a heat collection unit, a heat supply unit and a hot water storage tank, wherein the heat collection unit and the heat supply unit are both connected to the hot water storage tank, the heat collection unit is used to collect the heat energy of sunlight and store the heat energy in the hot water storage tank, and the heat supply unit is used to transport the heat energy in the hot water storage tank to the thermal load equipment; The hot water storage tank comprises: A box body, wherein the box body has an inner cavity; a first plate and a second plate, the first plate and the second plate being arranged in the inner cavity to separate the inner cavity into a first chamber and a second chamber, one of the first plate and the second plate being movable relative to the other to adjust the size of the first chamber and the second chamber, at least one of the first plate and the second plate being provided with a first hole and a first valve, the first hole being used to connect the first chamber and the second chamber, and the first valve being used to control the opening and closing of the first hole; A first inlet, a first outlet, a second inlet and a second outlet are arranged on the box body and communicated with the first chamber, the first inlet and the first outlet are connected to the heat collecting unit, and the second inlet and the second outlet are connected to the heat supply unit.

2. The solar thermal heating system according to claim 1, characterized in that: The heat collection unit comprises a heat collector, a first heat exchanger, a first pump and a second pump which are connected to each other. The heat collector, the first heat exchanger and the first pump are connected through a first pipeline so that a first working medium circulates between the heat collector and a hot side of the first heat exchanger. The first heat exchanger, the hot water storage tank and the second pump are connected through a second pipeline so that a second working medium circulates between the hot water storage tank and a cold side of the first heat exchanger. The first working medium and the second working medium perform heat exchange in the first heat exchanger. The heating unit includes a third pipeline and a third pump. The hot water storage tank, the third pump and the thermal load device are connected through the third pipeline so that the second working medium circulates between the hot water storage tank and the thermal load device.

3. The solar thermal heating system according to claim 2, characterized in that: It also includes a heat energy meter, and the first pipeline, the second pipeline and the third pipeline are all provided with the heat energy meter; And / or, further comprising an expansion tank and a liquid replenishing component, wherein the expansion tank is connected to the first pipeline, and the liquid replenishing component is communicated with the first pipeline to replenish the first working medium into the heat collecting unit; And / or, it also includes a fourth pipeline, and the water outlet end of the cold side of the first heat exchanger and the water inlet end of the thermal load, and the water inlet end of the cold side of the first heat exchanger and the water outlet end of the thermal load are connected by the fourth pipeline.

4. The solar thermal heating system according to claim 1, characterized in that: It also includes a hot water unit, which includes a heat exchange coil, a fifth pipeline and a sixth pipeline. The heat exchange coil is located in the first room. The water inlet of the heat exchange coil and the water source, and the water outlet of the heat exchange coil and the domestic water equipment are connected through the fifth pipeline. The sixth pipeline is connected between the fifth pipeline at the inlet end of the heat exchange coil and the fifth pipeline at the outlet end of the heat exchange coil. A fourth pump is provided on the sixth pipeline.

5. The solar thermal heating system according to claim 1, characterized in that: The box body has a first insulation layer, which is formed by polyurethane foaming, and the thickness of the first insulation layer is 15 mm to 45 mm, and the density of the first insulation layer is 41 kg / m 3 Up to 45kg / m 3 , the closed porosity of the first thermal insulation layer is not less than 96%; And / or, the inner cavity of the box body is a cylindrical cavity, the lengths of the first plate and the second plate both extend along the axial direction of the inner cavity and abut against the axial end faces of the inner cavity, the first plate is fixedly connected to the box body, and the second plate is rotatably connected to the box body; one end of the first plate in the width direction and one end of the second plate in the width direction are close to the middle of the inner cavity and abut against each other, the other end of the first plate in the width direction and the other end of the second plate in the width direction abut against the radial side wall of the inner cavity, and the cross-sections of the first chamber and the second chamber are both fan-shaped.

6. The solar thermal heating system according to claim 5, characterized in that: It also includes a first driving part, the first driving part is connected to the second plate and is used to drive the second plate to rotate relative to the box body, and the first driving part is linked to the first valve; And / or, the first hole is provided at a lower portion of the first plate and / or the second plate, and the number of the first holes is plural; And / or, the first plate and the second plate both include a shell and a second thermal insulation layer, and the second thermal insulation layer is filled in the shell; And / or, the volume of the first chamber is greater than the volume of the second chamber.

7. The solar thermal heating system according to claim 1, characterized in that: The hot water storage tank further includes a first heat storage component, the first heat storage component having an outer shell and a phase change medium filled in the outer shell, the first heat storage component is arranged in the first chamber, the outer shell has a first surface close to the second chamber and a second surface away from the second chamber, a first area is formed between the first surface and the first plate and the second plate, and a second area is formed between the second surface and the wall surface of the inner cavity.

8. The solar thermal heating system according to claim 7, characterized in that: The thermal conductivity of the first surface is greater than the thermal conductivity of the second surface; And / or, the first heat storage assembly is located at the upper part of the first chamber, and the distance between the lower end of the first heat storage assembly and the bottom surface of the first chamber is 400 mm to 1200 mm; And / or, the first heat storage component is arranged obliquely relative to the axial direction of the inner cavity, and the distance between the lower end of the first heat storage component and the second chamber is smaller than the distance between the upper end of the first heat storage component and the second chamber; And / or, the first inlet and the second outlet are arranged in communication with the first region, the first outlet is arranged in communication with the second region, and the second inlet is arranged in communication with the lower part of the first chamber; And / or, the first surface is an inner concave arc surface, and the second surface is an outer convex arc surface.

9. The solar thermal heating system according to claim 1, characterized in that: It also includes a seventh pipeline, one end of which is connected to the water source and the other end of which is connected to the second chamber, and the seventh pipeline is used to replenish water into the inner cavity; And / or, it also includes an electric heating component, which is arranged at the lower part of the inner cavity, and the number of the electric heating components is multiple.

10. A solar heat collection and heating method, characterized in that: The solar thermal collection and heating system according to any one of claims 1 to 9 is used to collect heat and provide heat, specifically comprising the following steps: Acquiring the temperatures of a plurality of temperature measuring points in the solar thermal collection heating system; Determine whether the temperature of the working medium in the heat collector of the heat collection unit is greater than a first threshold, and whether the difference between the temperature of the working medium in the heat collector of the heat collection unit and the temperature of the working medium in the first chamber of the hot water storage tank is greater than a second threshold; If yes, start the heat collection unit; Determining whether the temperature of the working medium in the first chamber of the hot water storage tank is greater than a third threshold and the temperature in the chamber is less than a fourth threshold; If yes, start the heating unit; Determine whether the temperature of the working medium in the heat collector of the heat collection unit and the temperature of the working medium in the first chamber of the hot water storage tank are both greater than a fifth threshold, and the fifth threshold is greater than the third threshold; If yes, adjusting the relative movement of the first plate and the second plate to increase the volume of the first chamber; Determine whether the difference between the temperature of the working medium in the heat collector of the heat collection unit and the temperature of the working medium in the first chamber of the hot water storage tank is less than a second threshold, and whether the temperature of the working medium in the first chamber of the hot water storage tank is less than a sixth threshold, and the sixth threshold is less than or equal to the third threshold; If so, the first plate and the second plate are adjusted to move relative to each other to reduce the volume of the first chamber, and the electric heating component is started.

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