Solar heat collection-radiation refrigeration self-switching composite device

Abstract

The invention provides a solar heat collection-radiation refrigeration self-switching composite device, belongs to the technical field of energy utilization, and aims to solve the problem that an existing solar heat collection-radiation refrigeration device is low in energy utilization rate. The device comprises a support and a frame, one end of the frame is hinged to the support, a heat exchanger is arranged on one side of the frame, a mounting frame is rotationally connected in the frame, and a heat collecting device and a refrigerating device are arranged in the mounting frame; the heat collecting device comprises a heat collecting heat pipe, one end of the heat collecting heat pipe is located in the mounting frame, and the other end is located in the heat exchanger. The refrigerating device comprises a refrigerating heat pipe, one end of the refrigerating heat pipe is located in the mounting frame, the other end of the refrigerating heat pipe is located in the heat exchanger, and a first driving device and a second driving device are further arranged on the support. According to the invention, the inclination state of the frame is changed through the first driving device, and the orientations of the refrigerating device and the heat collecting device are changed through the second driving device, so that switching between the refrigerating device and the heat collecting device is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of energy utilization, and in particular relates to a solar heat collection-radiation refrigeration self-switching composite device. Background Art

[0002] Cold energy and heat energy are one of the terminals of various energy conversions at present. The global energy consumption for building cooling and heating supply is more than 50% each year. Solar thermal collection technology absorbs 0.2~3μm solar radiation to produce a large amount of heat in a short time; radiation cooling technology relies on infrared rays in the "atmospheric window" (8~13μm) band to radiate heat with the outer space with a temperature of 3K to produce cold energy, realizing the clean production of cold energy.

[0003] In view of the high similarity between solar thermal collection technology and radiation cooling technology in principle and device structure, many scholars have tried to combine the two in recent years and designed a series of devices that can achieve solar thermal collection during the day and radiation cooling at night. However, such devices do not fully utilize the cooling capacity generated by radiation cooling technology during the day, and the heat generated during the day cannot be consumed in time, so most of the devices are idle and their energy utilization rate is not high.

[0004] The solar heat collection-radiation cooling self-switching composite device designed in this invention relies on a second driving device to flip the upper and lower surfaces of the heat collection-cooling device to achieve the switching of heat collection and cooling modes, achieving the effect of both heat collection and cooling. Summary of the invention

[0005] In view of this, the present invention provides a solar thermal collection-radiation refrigeration self-switching composite device to solve the problem that the existing solar thermal collection-radiation refrigeration device does not fully utilize the cooling capacity produced by the radiation refrigeration technology during the day, and the heat produced during the day cannot be consumed in time, so the device is mostly idle and its energy utilization rate is not high.

[0006] The technical solution adopted by the present invention is as follows: A solar heat collection-radiation cooling self-switching composite device comprises a bracket and a frame, one end of the frame is hinged to the bracket, a heat exchanger is provided on one side of the frame, a mounting frame is rotatably connected inside the frame, a heat collection device and a cooling device are provided inside the mounting frame; the heat collection device comprises a heat collecting heat pipe, one end of the heat collecting heat pipe is located inside the mounting frame, and the other end is located inside the heat exchanger; the cooling device comprises a cooling heat pipe, one end of the cooling heat pipe is located inside the mounting frame, and the other end is located inside the heat exchanger, and the cooling heat pipe and the heat collecting heat pipe are spaced apart in the height direction of the mounting frame; the bracket is also provided with a first driving device and a second driving device for respectively driving the frame and the mounting frame to rotate.

[0007] In this technical solution, it should be noted that both the heat collecting heat pipe and the cooling heat pipe are gravity heat pipes, which are filled with different working fluids; the evaporation section of the heat collecting heat pipe is located in the installation frame, and the condensation section is located in the heat exchanger; the condensation section of the cooling heat pipe is located in the installation frame, and the evaporation section is located in the heat exchanger. In this solution, in the heat collecting mode, the frame is tilted upward (toward the sun) (such as Figure 2 ), a higher heat collection efficiency can be obtained. At this time, the working fluid in the cooling heat pipe is all in a gaseous state, and the evaporation section of the heat collecting heat pipe is located in the installation frame, and the condensation section is located in the heat exchanger. After the working fluid in the condensation section is condensed, it flows back to the evaporation section by gravity and then absorbs heat and evaporates. In this cycle, the heat generated by the installation frame is transferred to the heat exchanger; in the cooling mode, the frame is tilted downward (toward the shade) (such as Figure 3 ), so as to minimize the negative impact of solar radiation on the efficiency of radiation cooling, and the second driving device drives the installation frame to rotate 180°, so that the refrigeration device faces upward and the heat collecting device faces downward. At this time, the working fluid in the heat collecting heat pipe is all in liquid state, and the condensing section of the refrigeration heat pipe is located in the installation frame, and the evaporating section is located in the heat exchanger. After condensing in the condensing section, the working fluid in the evaporating section relies on gravity to return to the evaporating section to absorb heat and evaporate. In this way, the cold amount produced by the installation frame is transported to the heat exchanger in a cycle; compared with the traditional device that uses water in the copper tube to transport cold and heat, the heat pipe has a higher heat exchange efficiency and does not require power equipment; that is, in the present invention, the tilt state of the frame can be changed by the first driving device during the day, and the direction of the heat collecting device and the refrigeration device can be changed by the second driving device to realize the switching of the refrigeration device and the heat collecting device, that is, the device can collect heat or cool separately during the day, and when cooling is needed at night, the refrigeration device can also be rotated to an upward position by the second driving device to efficiently absorb night radiation for cooling.

[0008] Preferably, the heat collecting device further comprises a heat collecting cover plate and a heat collecting plate core located in the installation frame, the heat collecting plate core wraps the heat collecting heat pipe, and the heat collecting cover plate is located outside the heat collecting plate core. The refrigeration device further comprises a refrigeration plate core and a refrigeration cover plate located in the installation frame, the refrigeration plate core wraps the refrigeration heat pipe, and the refrigeration cover plate is located outside the refrigeration plate core.

[0009] In this technical solution, it should be noted that the upper and lower surfaces of the mounting frame can respectively realize solar heat collection and radiation cooling; the heat collection cover plate is made of glass, the refrigeration cover plate is made of fully transparent material, the heat collection plate core is made of solar heat collection material, and the refrigeration plate core is made of material that can realize daytime radiation cooling.

[0010] Preferably, there are a plurality of the installation frames, and the plurality of the installation frames are arranged at intervals along the width direction of the frame.

[0011] In this technical solution, it should be noted that a heat collecting device and a refrigeration device are provided in each installation frame, and the setting of multiple frames can increase the energy collection efficiency.

[0012] Preferably, one side of the frame is provided with a movable plate corresponding to the number of the installation frames, the movable plate can slide along the length direction of the frame, a rotation guide groove is penetrated through the movable plate, a rotating rod is fixedly provided at one end of the installation frame, and one end of the rotating rod is slidably embedded in the rotating guide groove; The installation frame is rotatably connected to the frame via a rotating shaft, the rotating shaft is arranged parallel to the rotating rod, and the second driving device can drive each movable plate to move along the length direction of the frame; The second driving device includes a first electric push rod and a transmission rod, one end of the first electric push rod is connected to the frame, the output end of the first electric push rod is connected to one of the moving plates, and two adjacent moving plates are connected by the transmission rod.

[0013] In this technical solution, it should be noted that a slide groove is provided on the frame, and one end of the movable plate is slidably embedded in the slide groove. Secondly, a rotating frame is also provided on the frame, and the rotating shaft is rotatably connected to the rotating frame. The number of mounting frames is specifically 3, and the 3 mounting frames are equidistantly arranged along the width direction of the frame. The first electric push rod is arranged parallel to the frame, and the transmission rod and the first electric push rod are on the same straight line. In this solution, when collecting heat during the day, the heat collecting device is above the frame and the refrigeration device is below. When cooling during the day or cooling at night, the first electric push rod is started, and the output end of the first electric push rod is extended, and then each movable plate is driven to move through the transmission rod. During the movement of the movable plate, the rotating rod moves in the slide groove, thereby driving the rotating shaft to rotate, so that the mounting frame rotates 180 degrees, that is, the purpose of rotating the refrigeration device to the upper part of the mounting frame is achieved, and flexible switching between refrigeration and heat collection is achieved.

[0014] Preferably, both ends of the rotating guide groove are provided with arc-shaped slopes adapted to the rotating rod.

[0015] In this technical solution, it should be noted that the design of the arc slope ensures that the rotating shaft can obtain the rotational torque at the initial moment, the rotational motion can be started, and the occurrence of dead points is avoided.

[0016] Preferably, the first driving device comprises a second electric push rod, one end of the second electric push rod is hinged to the bracket, and the other end of the second electric push rod is hinged to the frame.

[0017] In this technical solution, it should be noted that the tilting state of the frame is changed by providing a second electric push rod.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In the present invention, the first driving device can be used to change the tilt state of the frame during the day, and the second driving device can be used to change the orientation of the refrigeration device and the heat collection device to achieve the switching of the refrigeration device and the heat collection device, that is, the device can collect heat or cool separately during the day, achieving the effect of both collecting heat and cooling; and when cooling is needed at night, the second driving device can also be used to rotate the refrigeration device to an upward position to absorb nighttime radiation with high efficiency for cooling; 2. In the present invention, when collecting heat during the day, the heat collecting device is above the frame and the refrigeration device is below. When cooling is needed during the day or at night, the first electric push rod is started, the output end of the first electric push rod is extended, and then each movable plate is driven to move through the transmission rod. During the movement of the movable plate, the rotating rod moves in the slide groove, and then drives the rotating shaft to rotate, so that the installation frame rotates 180 degrees, that is, the purpose of rotating the refrigeration device to the upper part of the installation frame is achieved, and flexible switching between cooling and heat collection is achieved; 3. In the present invention, the design of the arc slope ensures that the rotating shaft can obtain the rotation torque at the initial moment, the rotation motion can be started, and the occurrence of dead points is avoided; 4. In the present invention, the upper and lower surfaces of the mounting frame can realize solar energy heat collection and radiation cooling respectively; the heat collection cover plate is made of glass, the refrigeration cover plate is made of fully transparent material, the heat collection plate core is made of solar energy heat collection material, and the refrigeration plate core is made of material that can realize daytime radiation cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will now be described by way of example with reference to the accompanying drawings, in which: Figure 1 It is a structural schematic diagram of the device of the present invention; Figure 2 This is a schematic diagram of the operation of the device of the present invention in the heat collection mode; Figure 3 This is a schematic diagram of the operation of the device of the present invention in the refrigeration mode; Figure 4 is a schematic diagram of the flipping mechanism in the device of the present invention; Figure 5 It is a schematic diagram of the force on the bottom slope of the rotating guide groove and the initial state of the rotating rod; Among them: 1-installation frame; 11-heat collecting cover plate; 12-heat collecting plate core; 13-heat collecting heat pipe; 14-refrigeration heat pipe; 15-refrigeration plate core; 16-refrigeration cover plate; 2-frame; 211-first electric push rod; 212-rotation axis; 213-rotation rod; 214-rotation frame; 215-rotation guide groove; 2151-arc slope; 216-transmission rod; 217-slide groove; 3-bracket; 31-second electric push rod; 4-heat exchanger. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0026] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0027] Example 1

[0028] like Figure 1-Figure 5 As shown, an embodiment of the present invention discloses a solar heat collection-radiation cooling self-switching composite device, including a bracket 3 and a frame 2, one end of the frame 2 is hinged to the bracket 3, a heat exchanger 4 is provided on one side of the frame 2, a mounting frame 1 is rotatably connected inside the frame 2, and a heat collection device and a refrigeration device are provided inside the mounting frame 1; the heat collection device includes a heat collection heat pipe 13, one end of the heat collection heat pipe 13 is located in the mounting frame 1, and the other end is located in the heat exchanger 4; the refrigeration device includes a refrigeration heat pipe 14, one end of the refrigeration heat pipe 14 is located in the mounting frame 1, and the other end is located in the heat exchanger 4, and the refrigeration heat pipe 14 and the heat collection heat pipe 13 are spaced apart in the height direction of the mounting frame 1; the bracket 3 is also provided with a first driving device and a second driving device for driving the frame 2 and the mounting frame 1 to rotate respectively. It should be noted that both the heat collecting heat pipe 13 and the cooling heat pipe 14 are gravity heat pipes, which are filled with different working fluids; the evaporation section of the heat collecting heat pipe 13 is located in the installation frame 1, and the condensation section is located in the heat exchanger 4; the condensation section of the cooling heat pipe 14 is located in the installation frame 1, and the evaporation section is located in the heat exchanger 4. In this solution, in the heat collecting mode, the frame 2 is tilted upward (toward the sun) (such as Figure 2 ), a higher heat collection efficiency can be obtained. At this time, the working fluid in the cooling heat pipe 14 is all in a gaseous state, and the evaporation section of the heat collecting heat pipe 13 is located in the installation frame 1, and the condensation section is located in the heat exchanger 4. After the working fluid in the condensation section is condensed, it flows back to the evaporation section by gravity and then absorbs heat and evaporates. In this way, the heat generated by the installation frame 1 is transferred to the heat exchanger 4 in a cycle; in the cooling mode, the frame 2 is tilted downward (shaded) (such as Figure 3 ), so as to minimize the negative impact of solar radiation on the efficiency of radiation cooling, and the second driving device drives the installation frame 1 to rotate 180°, so that the refrigeration device faces upward and the heat collection device faces downward. At this time, the working fluid in the heat collection heat pipe 13 is all in liquid state, and the condensation section of the refrigeration heat pipe 14 is located in the installation frame 1, and the evaporation section is located in the heat exchanger 4. After the working fluid in the condensation section is condensed, it flows back to the evaporation section by gravity to absorb heat and evaporate. In this way, the cold amount produced by the installation frame 1 is transported to the heat exchanger 4 in a cycle; compared with the traditional device that uses water in a copper tube to transport cold and heat, the heat pipe has a higher heat exchange efficiency and does not require power equipment; that is, in the present invention, the tilt state of the frame 2 can be changed by the first driving device during the day, and the orientation of the heat collection device and the refrigeration device can be changed by the second driving device to realize the switching of the refrigeration device and the heat collection device, that is, the device can collect heat or cool separately during the day, and when cooling is needed at night, the refrigeration device can also be rotated to an upward position by the second driving device to efficiently absorb night radiation for cooling.

[0029] like Figure 1As shown, in this embodiment, the heat collecting device also includes a heat collecting cover plate 11 and a heat collecting plate core 12 located in the installation frame 1, the heat collecting plate core 12 wraps the heat collecting heat pipe 13, and the heat collecting cover plate 11 is located on the outside of the heat collecting plate core 12. The refrigeration device also includes a refrigeration plate core 15 and a refrigeration cover plate 16 located in the installation frame 1, the refrigeration plate core 15 wraps the refrigeration heat pipe 14, and the refrigeration cover plate 16 is located on the outside of the refrigeration plate core 15. It should be noted that the upper and lower surfaces of the installation frame 1 can respectively realize solar energy heat collection and radiation refrigeration; the heat collecting cover plate 11 is made of glass, the refrigeration cover plate 16 is made of fully transparent material, the heat collecting plate core 12 is made of solar energy heat collecting material, and the refrigeration plate core 15 is made of material that can realize daytime radiation refrigeration.

[0030] like Figure 2 As shown, in this embodiment, there are multiple installation frames 1, and the multiple installation frames 1 are arranged at intervals along the width direction of the frame 2. It should be noted that each installation frame 1 is provided with a heat collection device and a refrigeration device, and the arrangement of multiple frames 2 can increase energy collection efficiency.

[0031] Example 2

[0032] like Figure 4As shown, this embodiment is substantially the same as the above-mentioned embodiment, except that one side of the frame 2 is provided with movable plates corresponding to the number of the mounting frames 1, and the movable plates can slide along the length direction of the frame 2, and a rotating guide groove 215 is penetrated through the movable plate, and a rotating rod 213 is fixedly provided at one end of the mounting frame 1, and one end of the rotating rod 213 is slidably embedded in the rotating guide groove 215; the mounting frame 1 is rotatably connected to the frame 2 through a rotating shaft 212, and the rotating shaft 212 is arranged parallel to the rotating rod 213, and the second driving device can drive each movable plate to move along the length direction of the frame 2; the second driving device includes a first electric push rod 211 and a transmission rod 216, one end of the first electric push rod 211 is connected to the frame 2, and the output end of the first electric push rod 211 is connected to one of the movable plates, and two adjacent movable plates are connected by a transmission rod 216. It should be noted that a slide groove 217 is provided on the frame 2, and one end of the movable plate is slidably embedded in the slide groove 217. Secondly, a rotating frame 214 is also provided on the frame 2, and the rotating shaft 212 is rotatably connected to the rotating frame 214. The number of mounting frames 1 is specifically 3, and the 3 mounting frames 1 are equidistantly arranged along the width direction of the frame 2. The first electric push rod 211 is arranged parallel to the frame 2, and the transmission rod 216 and the first electric push rod 211 are on the same straight line. In this scheme, when collecting heat during the day, the heat collecting device is above the frame 2 and the refrigeration device is below. When cooling during the day or cooling at night, the first electric push rod 211 is started, and the output end of the first electric push rod 211 is extended, and then each movable plate is driven to move through the transmission rod 216. During the movement of the movable plate, the rotating rod 213 moves in the slide groove 217, thereby driving the rotating shaft 212 to rotate, so that the mounting frame 1 rotates 180 degrees, that is, the purpose of rotating the refrigeration device to the upper part of the mounting frame 1 is achieved, and flexible switching between refrigeration and heat collection is achieved.

[0033] like Figure 5 As shown, in this embodiment, both ends of the rotating guide groove 215 are provided with arc slopes 2151 adapted to the rotating rod 213. It should be noted that the design of the arc slope 2151 ensures that the rotating shaft 212 can obtain the rotating torque at the initial moment, the rotating motion can be started, and the occurrence of dead points is avoided.

[0034] like Figure 2 As shown, in this embodiment, the first driving device includes a second electric push rod 31, one end of the second electric push rod 31 is hinged to the bracket 3, and the other end is hinged to the frame 2. It should be noted that the tilt state of the frame 2 is changed by the second electric push rod 31.

[0035] The working principle of the present invention is: During the day, in the solar collector mode, frame 2 tilts upward (toward the sun) (e.g. Figure 2), a higher heat collection efficiency can be obtained. At this time, the working fluid in the cooling heat pipe 14 is all in a gaseous state, and the evaporation section of the heat collecting heat pipe 13 is located in the installation frame 1, and the condensation section is located in the heat exchanger 4. After the working fluid in the condensation section is condensed, it flows back to the evaporation section by gravity and then absorbs heat and evaporates. In this way, the heat generated by the installation frame 1 is transferred to the heat exchanger 4 in a cycle; during the day, in the cooling mode, the frame 2 is driven by the second electric push rod 31 to tilt downward (toward the shade) (such as Figure 3 ), in order to minimize the negative impact of solar radiation on the efficiency of radiation cooling, the second driving device drives the installation frame to rotate 180°, so that the refrigeration device faces upward and the heat collection device faces downward. At this time, the working fluid in the heat collection heat pipe 13 is all in liquid state, and the condensation section of the refrigeration heat pipe 14 is located in the installation frame 1, and the evaporation section is located in the heat exchanger 4. After the working fluid in the condensation section is condensed, it flows back to the evaporation section by gravity to absorb heat and evaporate. In this way, the cold energy produced by the installation frame 1 is transported to the heat exchanger 4 in a cycle; When cooling is needed at night, the first electric push rod 211 is started, the output end of the first electric push rod 211 is extended, and then each movable plate is driven to move through the transmission rod 216. During the movement of the movable plate, the rotating rod 213 moves in the slide groove 217, and then drives the rotating shaft 212 to rotate, so that the installation frame 1 rotates 180 degrees, that is, the purpose of rotating the refrigeration device to the upper part of the installation frame 1 is achieved, and flexible switching between cooling and heat collection is realized.

[0036] The circuits, electronic components and modules involved are all prior art and can be fully implemented by those skilled in the art. Needless to say, the content protected by the present invention does not involve improvements to software and methods.

[0037] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0038] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A solar heat collection-radiation cooling self-switching composite device, characterized in that: It comprises a bracket (3) and a frame (2), one end of the frame (2) is hinged to the bracket (3), a heat exchanger (4) is provided on one side of the frame (2), a mounting frame (1) is rotatably connected inside the frame (2), and a heat collecting device and a refrigeration device are provided inside the mounting frame (1); The heat collection device comprises a heat collection heat pipe (13), one end of the heat collection heat pipe (13) being located in the installation frame (1) and the other end of the heat collection heat pipe (13) being located in the heat exchanger (4); The refrigeration device comprises a refrigeration heat pipe (14), one end of the refrigeration heat pipe (14) is located in the installation frame (1), and the other end is located in the heat exchanger (4), and the refrigeration heat pipe (14) and the heat collecting heat pipe (13) are arranged at intervals along the height direction of the installation frame (1); The bracket (3) is also provided with a first driving device and a second driving device for respectively driving the frame (2) and the mounting frame (1) to rotate.

2. A solar heat collection-radiation cooling self-switching composite device according to claim 1, characterized in that: The heat collection device further comprises a heat collection cover plate (11) and a heat collection plate core (12) located in the installation frame (1); the heat collection plate core (12) wraps the heat collection heat pipe (13); and the heat collection cover plate (11) is located outside the heat collection plate core (12).

3. A solar heat collection-radiation cooling self-switching composite device according to claim 1, characterized in that: The refrigeration device further comprises a refrigeration plate core (15) and a refrigeration cover plate (16) located in the installation frame (1); the refrigeration plate core (15) wraps the refrigeration heat pipe (14); and the refrigeration cover plate (16) is located outside the refrigeration plate core (15).

4. A solar heat collection-radiation cooling self-switching composite device according to claim 1, characterized in that: There are a plurality of the installation frames (1), and the plurality of the installation frames (1) are arranged at intervals along the width direction of the frame (2).

5. A solar heat collection-radiation cooling self-switching composite device according to claim 4, characterized in that: One side of the frame (2) is provided with a movable plate corresponding to the number of the mounting frames (1); the movable plate can slide along the length direction of the frame (2); a rotation guide groove (215) is provided through the movable plate; a rotation rod (213) is fixedly provided at one end of the mounting frame (1); one end of the rotation rod (213) is slidably embedded in the rotation guide groove (215); The installation frame (1) is rotatably connected to the frame (2) via a rotating shaft (212); the rotating shaft (212) and the rotating rod (213) are arranged in parallel; and the second driving device can drive each movable plate to move along the length direction of the frame (2).

6. A solar heat collection-radiation cooling self-switching composite device according to claim 5, characterized in that: The second driving device comprises a first electric push rod (211) and a transmission rod (216); one end of the first electric push rod (211) is connected to the frame (2); an output end of the first electric push rod (211) is connected to one of the movable plates; and two adjacent movable plates are connected via the transmission rod (216).

7. A solar heat collection-radiation cooling self-switching composite device according to claim 5, characterized in that: Both ends of the rotating guide groove (215) are provided with arc-shaped slopes (2151) adapted to the rotating rod (213).

8. The solar heat collection-radiation cooling self-switching composite device according to claim 1, characterized in that: The first driving device comprises a second electric push rod (31), one end of the second electric push rod (31) being hinged to the bracket (3) and the other end of the second electric push rod (31) being hinged to the frame (2).

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