A highly efficient heat exchange phase change energy storage device based on solar energy

Abstract

The present invention discloses a highly efficient heat exchange phase change energy storage device based on solar energy, and relates to the technical field of phase change energy storage devices. A solar collector, a water tank and a phase change heat storage device are arranged on a base, and the solar collector, the water tank and the phase change heat storage device are connected by a water pipeline, a circulating pump is connected to the water pipeline, a rotating module is fixed on the base, a bracket is connected to the rotating module, an elastic frame is fixed on the bracket, a bending control module is connected to the bottom of the elastic frame, more than two support rods are evenly arranged on the elastic frame, each support rod is provided with more than two reflective plates along the length direction, and more than two reflective plates can form a reflective surface in combination, and a PLC controller is also arranged on the base. The highly efficient heat exchange phase change energy storage device based on solar energy proposed by the present invention can improve the utilization rate of light energy and the heating efficiency, and can also have a good heating effect when the light is weak.

Description

Technical Field

[0001] The present invention relates to the technical field of phase change energy storage devices, and more specifically, to a high-efficiency heat exchange phase change energy storage device based on solar energy. Background Art

[0002] With the continuous progress of industrialization and modernization, energy consumption is increasing, and energy problems are becoming more and more prominent. Energy conservation and emission reduction is a major measure in my country's development. Phase change energy storage devices can store and release thermal energy, effectively improve the utilization efficiency of thermal energy, and alleviate the pressure of peak electricity consumption.

[0003] In the prior art, for example, a Chinese utility model patent with a publication number of CN218821842U discloses a high-efficiency phase-change energy storage device for heating, comprising a solar collector panel and an energy storage box, wherein the solar collector panel is connected in series with a first heat exchange coil disposed in the energy storage box through two heat transfer oil pipes to form a loop for heat transfer oil circulation; a first coil and a second coil are coaxially disposed in sequence from outside to inside inside the first heat exchange coil, and the number of coil turns of the first coil is greater than the number of coil turns of the second coil; the bottom ends of the first coil and the second coil both penetrate the bottom wall of the energy storage box and are commonly connected to the air inlet pipe outside the energy storage box; the tops of the first coil and the second coil both penetrate the top of the energy storage box and extend to the outside of the energy storage box; a water inlet pipe and a water outlet pipe are disposed on the side wall of the energy storage box, and an interlayer is disposed on the side wall and the top wall of the energy storage box, and a phase change layer is disposed in the interlayer; the utility model can heat both water and air, thereby realizing the versatility and high efficiency of the device.

[0004] However, the above technical solution still has the following defects: since usually only the sunny side of the solar collector can receive the thermal radiation of sunlight, the utilization rate of light energy is low, and when the light is weak, the heating effect of the solar collector is also relatively poor. Summary of the invention

[0005] In order to overcome the defects of the prior art, the present invention proposes a high-efficiency heat exchange phase change energy storage device based on solar energy, which can improve the utilization rate of light energy and the heating efficiency, and can also have a good heating effect when the light is weak.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] The invention provides a high-efficiency heat exchange phase-change energy storage device based on solar energy, comprising a base, a solar collector, a water tank, a phase-change heat accumulator, a water pipeline, a circulation pump and an auxiliary heat collection mechanism. The base is provided with the solar collector, the water tank and the phase-change heat accumulator, and the solar collector, the water tank and the phase-change heat accumulator are connected by a water pipeline, the water pipeline is connected with a circulation pump, an auxiliary heat collection mechanism is arranged below the solar collector, the auxiliary heat collection mechanism comprises a rotating module, a bracket, an elastic frame, a bending control module, a support rod, a reflective plate and a PLC controller, the rotating module is fixedly arranged on the base, the rotating module is connected with a bracket, the support is fixedly provided with an elastic frame, the bottom of the elastic frame is connected with a bending control module, more than two support rods are evenly arranged on the elastic frame, each support rod is provided with more than two reflective plates along the length direction, and the combination of more than two reflective plates can form a reflective surface, the base is also provided with a PLC controller, and the circulation pump, the rotating module and the bending control module are all electrically connected to the PLC controller.

[0008] In a preferred technical solution of the present invention, the rotating module includes a shell, a circular tube, a convex lens, a heat-bending sheet, a first contact, a second contact and a driving unit. The shell is fixedly arranged on one side of the bracket, a circular tube is vertically arranged on the top of the shell, a convex lens is arranged in the circular tube, two heat-bending sheets are symmetrically arranged with the central axis of the convex lens as the center in the shell, and there is a certain gap between the two heat-bending sheets, the ends of the two heat-bending sheets away from each other are connected to the first contact, a second contact matching the first contact is arranged on the inner wall of the shell, the driving unit is arranged on the base, and the first contact, the second contact, the driving unit and the PLC controller are electrically connected.

[0009] In a preferred technical solution of the present invention, the driving part includes a first motor, a first screw rod, a first slider, a sliding frame, an arc guide rail, a second slider and a sliding rod. The first motor is fixed on the base, the output end of the first motor is connected to the first screw rod, the first slider is threadedly connected to the first screw rod, a sliding frame is fixed on the top of the first slider, the arc guide rail is fixed on the base, the second slider is slidably connected to the arc guide rail, the second slider is fixed with a sliding rod, and the sliding frame is slidably connected to the sliding rod, and one end of the bracket is connected to the second slider.

[0010] In a preferred technical solution of the present invention, a dust cover is hingedly connected to the top end of the circular tube.

[0011] In a preferred technical solution of the present invention, the bending control module includes a second motor, a second screw rod, a sliding seat, a transmission rod and a control component. The second motor is fixed on the bracket, and the output end of the second motor is connected to the second screw rod. The second screw rod is threadedly connected to two sliding seats and can drive the two sliding seats to move closer to or away from each other. A transmission rod is hinged on each sliding seat, and the free end of the transmission rod on each sliding seat is hinged to one end of the elastic frame respectively. The control component is arranged on the bracket for controlling the operation of the second motor.

[0012] In a preferred technical solution of the present invention, the control component includes a heat conductive sheet, a thermal expansion airbag, a support plate and a pressure sensor. The heat conductive sheet is fixed on the bracket, the bottom end of the heat conductive sheet is connected to the thermal expansion airbag, a support plate is provided at the bottom of the thermal expansion airbag, a pressure sensor is provided on the support plate, and the pressure sensor is electrically connected to the PLC controller.

[0013] In a preferred technical solution of the present invention, a return spring is also connected to the top of the support plate, and the free end of the return spring is connected to the bracket.

[0014] In a preferred technical solution of the present invention, an exhaust valve is also provided on the solar thermal collector.

[0015] The beneficial effects of the present invention are:

[0016] The present invention proposes a high-efficiency heat exchange phase change energy storage device based on solar energy. Through the auxiliary heat collection mechanism, it can reflect excess light to the shady side of the solar collector when the light is strong, so as to improve the utilization rate of light energy. The shady and yang sides heat the water in the solar collector at the same time, which helps to improve the heating efficiency. When the light is weak, the reflective surface can be controlled to bend into an arc shape, so as to focus the light on the solar collector and form a long rectangular light spot, so as to increase the local light intensity on the shady side and ensure the heating effect. The rotating module can automatically adjust the inclination angle of the bracket, so that the reflective surface has the function of chasing the sun, so as to ensure the reflective effect. The exhaust valve can exhaust air and heat to prevent the solar collector from overheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a high-efficiency heat exchange phase change energy storage device based on solar energy provided by a specific embodiment of the present invention;

[0018] Figure 2 yes Figure 1 Left view of

[0019] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0020] Figure 4 yes Figure 2 Cross-sectional view in the BB direction;

[0021] Figure 5 yes Figure 1 Schematic diagram of the structure of the middle reflective surface;

[0022] Figure 6 yes Figure 2 The local schematic diagram of the C in the middle;

[0023] Figure 7 yes Figure 6 Half-section view.

[0024] In the figure:

[0025] 1. Base; 2. Solar collector; 21. Exhaust valve; 3. Water tank; 4. Phase change heat storage device; 5. Water pipeline; 6. Circulation pump; 7. Auxiliary heat collection mechanism; 71. Rotation module; 711. Shell; 712. Circular tube; 713. Convex lens; 714. Thermal bending sheet; 715. First contact; 716. Second contact; 717. Driving unit; 7171. First motor; 7172. First screw rod; 7173. First slider; 7174. Sliding frame; 7175. Arc guide Rail; 7176, second slider; 7177, slide bar; 718, dust cover; 72, bracket; 73, elastic frame; 74, bending control module; 741, second motor; 742, second screw rod; 743, sliding seat; 744, transmission rod; 745, control member; 7451, heat conductive sheet; 7452, thermal expansion airbag; 7453, support plate; 7454, pressure sensor; 7455, reset spring; 75, support rod; 76, reflector; 77, PLC controller. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0027] like Figure 1-7As shown, an embodiment provides a high-efficiency heat exchange phase change energy storage device based on solar energy, including a base 1, a solar collector 2, a water tank 3, a phase change heat accumulator 4, a water pipeline 5, a circulation pump 6 and an auxiliary heat collection mechanism 7. The base 1 is provided with the solar collector 2, the water tank 3 and the phase change heat accumulator 4, and the solar collector 2, the water tank 3 and the phase change heat accumulator 4 are connected by the water pipeline 5, and the water pipeline 5 is connected with the circulation pump 6. The auxiliary heat collection mechanism 7 is arranged below the solar collector 2, and the auxiliary heat collection mechanism 7 includes a rotating module 71, a bracket 72, an elastic frame 73, a bending control module 74, a support Rod 75, reflector 76 and PLC controller 77, the rotation module 71 is fixed on the base 1, the rotation module 71 is connected to the bracket 72, the bracket 72 is fixed with an elastic frame 73, the bottom of the elastic frame 73 is connected to a bending control module 74, the elastic frame 73 is evenly provided with more than two support rods 75, each support rod 75 is provided with more than two reflectors 76 along the length direction, and the combination of more than two reflectors 76 can form a reflecting surface, the base 1 is also provided with a PLC controller 77, and the circulating pump 6, the rotation module 71 and the bending control module 74 are all electrically connected to the PLC controller 77. In this embodiment, the base 1 is fixedly installed on the ground by fastening bolts, and the solar collector 2, the water tank 3 and the phase change heat storage device 4 are arranged on the base 1 from left to right. The solar collector 2 is capable of absorbing solar radiation and heating the cold water inside to obtain hot water. The water tank 3 is filled with water to be heated, and the water can circulate between the solar collector 2, the water tank 3 and the phase change heat storage device 4 under the action of the circulation pump 6 and the water pipe 5 to achieve heat exchange. Since the solar collector 2 usually only has the sunny side that can receive sunlight, the heating efficiency is low, and the auxiliary heat collection mechanism 7 provided in the present device can reflect sunlight to the shady side of the solar collector 2, thereby achieving simultaneous heating of water on both the shady and sunny sides, thereby improving the efficiency of heat exchange. Among them, the bracket 72 is arranged between the base 1 and the solar collector 2, and the rotating module 71 is arranged to drive the bracket 72 to rotate, thereby driving the reflective surface formed by a plurality of reflective plates 76 to rotate synchronously, and making it always face the direction of the sun to ensure the reflection effect; the elastic frame 73 is a rectangular frame, and the bending control module 74 is arranged to bend the elastic frame 73 into an arc shape, thereby changing the reflective surface from a straight surface to an arc surface, and making the central axis of the arc surface located on the solar collector 2. Since the arc surface can play a role in gathering light, the light intensity at the focus can be significantly increased to ensure the heating effect, so as to avoid the situation where the heating effect of the solar collector 2 becomes worse due to the low light intensity of the sun; the support rod 75 is located at the top of the elastic frame 73, and more than two support rods 75 are arranged horizontally, and can produce adaptive deformation with the bending of the elastic frame 73; the PLC controller 77 is arranged to control the circulation pump 6, the rotating module 71 and the bending control module 74 to work together.In addition, the components selected in this embodiment, such as the PLC controller 77, the solar thermal collector 2, the phase change heat storage device 4 and the circulation pump 6, are all parts that can be purchased on the market.

[0028] Specifically, the rotating module 71 includes a shell 711, a circular tube 712, a convex lens 713, a heat-bending sheet 714, a first contact 715, a second contact 716 and a driving unit 717. The shell 711 is fixed to one side of the bracket 72. A circular tube 712 is vertically arranged on the top of the shell 711, and a convex lens 713 is arranged in the circular tube 712. Two heat-bending sheets 714 are symmetrically arranged in the shell 711 with the central axis of the convex lens 713 as the center, and there is a certain gap between the two heat-bending sheets 714. The ends of the two heat-bending sheets 714 away from each other are connected to the first contact 715. A second contact 716 matching the first contact 715 is arranged on the inner wall of the shell 711. The driving unit 717 is arranged on the base 1, and the first contact 715, the second contact 716, the driving unit 717 and the PLC controller 77 are electrically connected. In this embodiment, the shell 711 is a rectangular shell, the circular tube 712 is vertically fixed at the top center of the shell 711 , and the bottom end of the circular tube 712 is communicated with the inner chamber of the shell 711 . The convex lens 713 is configured to focus light. When sunlight is irradiated vertically to the convex lens 713, the focus is located in the gap between the two thermal bending plates 714. At this time, the thermal bending plates 714 will not be heated, so that the first contact 715 and the second contact 716 are in a non-contact state. When sunlight is irradiated to the convex lens 713 along an inclined direction, the focus will be located on one of the thermal bending plates 714. At this time, the light heats the thermal bending plate 714 to cause it to bend, thereby causing the first contact 715 and the second contact 716 to contact, so as to control the operation of the driving unit 717. The output end of the driving unit 717 is connected to the bracket 72, and can drive the bracket 72 to move and tilt at a certain angle, thereby causing the reflective surface to tilt synchronously to ensure that the sunlight is always perpendicular to the reflective surface, thereby achieving the operation of controlling the reflective surface to chase the sun, and ensuring that the reflected light can always irradiate the shady side of the solar collector 2. In addition, the first contact 715 and the second contact 716 located at the two ends of the inner side of the shell 711 are respectively used to control the driving part 717 to rotate forward or reverse, so as to achieve the purpose of reciprocatingly adjusting the position of the bracket 72.

[0029] Specifically, the driving unit 717 includes a first motor 7171, a first screw rod 7172, a first slider 7173, a sliding frame 7174, an arc guide rail 7175, a second slider 7176 and a sliding rod 7177. The first motor 7171 is fixed on the base 1, the output end of the first motor 7171 is connected to the first screw rod 7172, the first slider 7173 is threadedly connected to the first screw rod 7172, the top of the first slider 7173 is fixed with a sliding frame 7174, the arc guide rail 7175 is fixed on the base 1, the arc guide rail 7175 is slidably connected to the second slider 7176, the second slider 7176 is fixed with a sliding rod 7177, the sliding frame 7174 is slidably connected to the sliding rod 7177, and one end of the bracket 72 is connected to the second slider 7176. In this embodiment, the first screw rod 7172 is horizontally arranged above the base 1, and the first motor 7171 is arranged to drive the first screw rod 7172 to rotate, thereby driving the first slider 7173 to slide left and right on the base 1. The sliding frame 7174 is vertically arranged above the first slider 7173, and the bottom end of the sliding frame 7174 is fixedly connected to the top of the first slider 7173. The sliding rod 7177 can slide up and down along the sliding frame 7174, so that the first slider 7173 can drive the second slider 7176 to slide on the arc guide rail 7175 during the movement, and the arc guide rail 7175 is an arc-shaped structure. Since the bracket 72 is fixedly mounted on the second slider 7176, and the inclination angle of the second slider 7176 changes when sliding on the arc guide rail 7175, the sliding of the second slider 7176 can drive the bracket 72 to move synchronously to adjust the direction of the reflective surface.

[0030] Specifically, a dust cover 718 is hinged at the top of the circular tube 712. In this embodiment, the dust cover 718 is used to block dust in the air to prevent dust from gathering on the convex lens 713 and affecting the light focusing effect. The dust cover 718 is made of transparent material to allow light to pass through normally. In addition, the dust cover 718 is easier to clean than the convex lens 713 and is easy to operate.

[0031] Specifically, the bending control module 74 includes a second motor 741, a second screw rod 742, a sliding seat 743, a transmission rod 744 and a control member 745. The second motor 741 is fixed on the bracket 72. The output end of the second motor 741 is connected to the second screw rod 742. The second screw rod 742 is threadedly connected to two sliding seats 743 and can drive the two sliding seats 743 to move closer to or farther from each other. Each sliding seat 743 is hinged with a transmission rod 744, and the free end of the transmission rod 744 on each sliding seat 743 is respectively hinged to one end of the elastic frame 73. The control member 745 is arranged on the bracket 72 and is used to control the operation of the second motor 741. In this embodiment, the second screw rod 742 is provided with two sections of threads with opposite spiral directions, and the two sliding seats 743 are respectively threadedly connected to one section of the threads, so that when the second motor 741 drives the second screw rod 742 to rotate, the two sliding seats 743 can be controlled to move closer to or farther from each other. When the sliding seat 743 slides, a pushing force or a pulling force can be applied to both ends of the elastic frame 73 through the transmission rod 744 at the same time, thereby controlling the elastic frame 73 to bend or flatten.

[0032] Specifically, the control member 745 includes a heat conductive sheet 7451, a heat expansion airbag 7452, a support plate 7453 and a pressure sensor 7454. The heat conductive sheet 7451 is fixed on the bracket 72. The bottom end of the heat conductive sheet 7451 is connected to the heat expansion airbag 7452. The bottom of the heat expansion airbag 7452 is provided with a support plate 7453. The support plate 7453 is provided with a pressure sensor 7454. The pressure sensor 7454 is electrically connected to the PLC controller 77. In this embodiment, the heat conductive sheet 7451 is fixed on the sunny side of the bracket 72 and can be directly exposed to the sun. When directly exposed to the sun, the heat conductive sheet 7451 can conduct heat to the heat expansion airbag 7452. The heat expansion airbag 7452 contains an expandable gas, which will expand when heated, thereby driving the heat expansion airbag 7452 to expand in large volume. The support plate 7453 is arranged on the side of the thermal expansion airbag 7452 away from the bracket 72, and the pressure sensor 7454 is located on the side of the support plate 7453 close to the bracket 72. When the light intensity is high, the thermal expansion airbag 7452 expands. At this time, the thermal expansion airbag 7452 will drive the support plate 7453 to move to the side away from the bracket 72 so that the pressure sensor 7454 is not subjected to force. At this time, the second motor 741 will drive the two sliding seats 743 to approach each other so that the elastic frame 73 is straightened and flattened to form a plane.

[0033] Specifically, a return spring 7455 is further connected to the top of the support plate 7453, and the free end of the return spring 7455 is connected to the bracket 72. In this embodiment, the return spring 7455 can pull the support plate 7453 to move toward the side close to the bracket 72 when the thermal expansion airbag 7452 is not expanded, so that the support plate 7453 will squeeze the pressure sensor 7454. When the pressure sensor 7454 is squeezed, it will transmit the pressure information to the PLC controller 77, and then the PLC controller 77 will control the second motor 741 to reverse, and at this time the second motor 741 will drive the two sliding seats 743 to move away from each other so that the elastic frame 73 bends to form an arc surface.

[0034] Specifically, the solar thermal collector 2 is further provided with an exhaust valve 21. In this embodiment, the exhaust valve 21 is used to discharge air and heat to prevent the solar thermal collector 2 from overheating.

[0035] Working principle: When the weather is clear, solar energy is collected by the solar collector 2 to heat the heat-conducting medium in the solar collector 2, and the circulating pump 6 is controlled to start. The circulating pump 6 controls the water in the water tank 3 to circulate between the solar collector 2, the water tank 3 and the phase change heat accumulator 4, so that heat exchange occurs to heat the water. At the same time, the hot water will also heat the phase change material in the phase change heat accumulator 4, thereby realizing the storage of the solar energy collected by the solar collector 2 in the phase change heat accumulator 4. When the light intensity is high, the heat of the heat conductive sheet 7451 will cause the heat expansion airbag 7452 to expand, thereby driving the support plate 7453 away from the bracket 72. At this time, the pressure sensor 7454 is not subjected to pressure, and the second motor 741 will drive the elastic frame 73 to straighten so that the reflective surface is a straight surface, thereby being able to reflect light to the back of the solar collector 2, and heating the water through both the yin and yang sides at the same time, greatly improving the heating efficiency. When the light intensity decreases, the heat collection effect of the solar collector 2 will deteriorate, and the temperature on the heat conductive sheet 7451 will drop synchronously. At this time, the return spring 7455 pushes the support plate 7453 close to the bracket 72, thereby squeezing the pressure sensor 7454. At this time, the second motor 741 reverses, and the second motor 741 drives the second screw rod 742 to rotate. The second screw rod 742 drives the two sliding seats 743 to move away from each other, and then drives the elastic frame 73 to bend through the transmission rod 744, so that the reflective surface becomes an arc surface, thereby focusing the light to the dark side of the solar collector 2 and forming a long rectangular light spot. Since the temperature at the light spot is relatively high, the heating effect can be guaranteed. At the same time, during the working process, when the light irradiation path is deflected due to the movement of the sun, the focus will be irradiated onto the heat bending sheet 714 under the action of the convex lens 713, thereby causing the heat bending sheet 714 to bend, so that the first contact 715 and the second contact 716 are in contact. At this time, the PLC controller 77 controls the first motor 7171 to work, the first motor 7171 drives the first screw rod 7172 to rotate, and the first screw rod 7172 drives the first slider 7173 to move on the base 1. The first slider 7173 is driven by the first motor 7171 to rotate. The second slider 7176 is driven by the sliding frame 7174 and the sliding rod 7177 to slide on the arc guide rail 7175, thereby adjusting the position of the bracket 72 so that the light can be perpendicular to the reflective surface again. At this time, the focus of the convex lens 713 is exactly located at the gap between the two heat-bending plates 714. The heat-bending plates 714 will automatically reset after being not heated, so that the first contact 715 and the second contact 716 are out of contact, and then the first motor 7171 stops working, so as to achieve the purpose of automatically controlling the reflective surface to chase the sun.

[0036] The present invention is described by preferred embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. The present invention is not limited to the specific embodiments disclosed herein, and other embodiments falling within the claims of this application are within the scope of protection of the present invention.

Claims

1. A highly efficient heat exchange phase change energy storage device based on solar energy, characterized in that: The invention comprises a base (1), a solar heat collector (2), a water tank (3), a phase change heat accumulator (4), a water pipeline (5), a circulation pump (6) and an auxiliary heat collection mechanism (7); the base (1) is provided with the solar heat collector (2), the water tank (3) and the phase change heat accumulator (4); the solar heat collector (2), the water tank (3) and the phase change heat accumulator (4) are connected via the water pipeline (5); the water pipeline (5) is connected with the circulation pump (6); an auxiliary heat collection mechanism (7) is provided below the solar heat collector (2); the auxiliary heat collection mechanism (7) comprises a rotating module (71), a bracket (72), an elastic frame (73), a bending control module (74), a support rod (75) and a reflective plate (76) and a PLC controller (77), the rotating module (71) is fixedly arranged on the base (1), the rotating module (71) is connected to a bracket (72), the bracket (72) is fixedly arranged with an elastic frame (73), the bottom of the elastic frame (73) is connected to a bending control module (74), more than two support rods (75) are evenly arranged on the elastic frame (73), each support rod (75) is provided with more than two reflective plates (76) along the length direction, and the combination of the more than two reflective plates (76) can form a reflective surface, the base (1) is also provided with a PLC controller (77), and the circulating pump (6), the rotating module (71) and the bending control module (74) are all electrically connected to the PLC controller (77); The bending control module (74) comprises a second motor (741), a second screw rod (742), a sliding seat (743), a transmission rod (744) and a control member (745); the second motor (741) is fixedly mounted on the bracket (72); the output end of the second motor (741) is connected to the second screw rod (742); two sliding seats (743) are threadedly connected to the second screw rod (742) and can drive the two sliding seats (743) to move closer to or farther from each other; each sliding seat (743) is hingedly mounted with a transmission rod (744); and the free end of the transmission rod (744) on each sliding seat (743) is hingedly mounted to one end of the elastic frame (73); the control member (745) is arranged on the bracket (72) and is used to control the operation of the second motor (741); The control component (745) comprises a heat conducting sheet (7451), a heat expansion airbag (7452), a support plate (7453) and a pressure sensor (7454); the heat conducting sheet (7451) is fixed on the bracket (72); the bottom end of the heat conducting sheet (7451) is connected to the heat expansion airbag (7452); the bottom of the heat expansion airbag (7452) is provided with a support plate (7453); the support plate (7453) is provided with a pressure sensor (7454); and the pressure sensor (7454) is electrically connected to the PLC controller (77); A return spring (7455) is also connected to the top of the support plate (7453), and a free end of the return spring (7455) is connected to the bracket (72).

2. According to claim 1, a high-efficiency heat exchange phase change energy storage device based on solar energy is characterized in that: The rotating module (71) comprises a shell (711), a circular tube (712), a convex lens (713), a thermal bending sheet (714), a first contact (715), a second contact (716) and a driving unit (717); the shell (711) is fixedly arranged on one side of the bracket (72); a circular tube (712) is vertically arranged on the top of the shell (711); a convex lens (713) is arranged in the circular tube (712); and a plurality of convex lenses (713) are arranged in the shell (711) symmetrically around the central axis of the convex lens (713). There are two heat bending plates (714), and there is a certain gap between the two heat bending plates (714); the ends of the two heat bending plates (714) that are away from each other are connected to a first contact (715); a second contact (716) that matches the first contact (715) is arranged on the inner wall of the shell (711); a driving part (717) is arranged on the base (1); and the first contact (715), the second contact (716), the driving part (717) and the PLC controller (77) are electrically connected.

3. According to claim 2, a high-efficiency heat exchange phase change energy storage device based on solar energy is characterized in that: The driving part (717) comprises a first motor (7171), a first screw rod (7172), a first slider (7173), a sliding frame (7174), an arc guide rail (7175), a second slider (7176) and a sliding rod (7177); the first motor (7171) is fixed on the base (1); the output end of the first motor (7171) is connected to the first screw rod (7172); the first slider is threadedly connected to the first screw rod (7172); (7173), a sliding frame (7174) is fixedly provided on the top of the first sliding block (7173), an arc guide rail (7175) is fixedly provided on the base (1), a second sliding block (7176) is slidably connected to the arc guide rail (7175), a sliding rod (7177) is fixedly provided on the second sliding block (7176), and the sliding frame (7174) is slidably connected to the sliding rod (7177), and one end of the bracket (72) is connected to the second sliding block (7176).

4. According to claim 2, a high-efficiency heat exchange phase change energy storage device based on solar energy is characterized in that: The top end of the circular tube (712) is also hinged with a dust cover (718).

5. The high-efficiency heat exchange phase change energy storage device based on solar energy according to claim 1, characterized in that: The solar thermal collector (2) is also provided with an exhaust valve (21).

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