A solar thermal collector

Abstract

The invention discloses a solar thermal collector, which relates to the technical field of converting solar energy into thermal energy. The solar thermal collector is composed of a bracket, a V-shaped corrugated reflector, a solar vacuum heat collecting tube, a heating core, a central connecting box and the solar vacuum heat collecting tube. The solar vacuum heat collecting tube is a double-layer heterogeneous vacuum tubular component, which is composed of an outer glass tube, an inner oxygen-free copper tube, a selective heat-absorbing material layer attached to the outer wall of the inner oxygen-free copper tube, a vacuum sealing device, a desiccant, a moisture-absorbing film and a positioning sheet; the heating core is a U-shaped hollow copper tube with a ring-shaped cross section, which is composed of a water inlet pipe, a heating core body, a water outlet pipe and an expansion spring; the central connecting box is a rectangular box body which is buckled by an upper and lower box bodies. The product has the advantages of reasonable structure, rapid heating in a short time, high light-heat conversion efficiency and the like.

Description

Technical Field

[0001] The invention relates to the technical field of solar energy, and in particular to a solar thermal collector. Background Art

[0002] At present, with the continuous progress of science and technology, new materials and new technologies are changing with each passing day. It has fostered and spawned a batch of new equipment, and also provided solid technical support for the application of this technology. The world is in motion and development, and any new thing has a process of growth and progress. The same is true for existing solar thermal collection technology. With the continuous deepening of promotion and application, some deep-seated problems have gradually surfaced, such as the problem of large heat dissipation loss of flat solar collectors, low light-to-heat conversion efficiency and large lighting area of ​​U-shaped solar collectors. For example, glass-metal solar collectors, due to the immature sealing technology of different materials and the limited reliable use temperature of the product, the existence of these problems has restricted the forward development of solar thermal collection technology to varying degrees. Summary of the invention

[0003] In view of the above problems, the present invention provides a solar collector, which is composed of a bracket, a V-shaped corrugated reflector, a solar vacuum heat collection tube, a heating core, a central connection box and a solar vacuum heat collection tube fixing seat. The V-shaped corrugated reflector is composed of a frame and a V-shaped corrugated thin plate, which is installed on the bracket. The solar vacuum heat collection tube is a double-layer heterogeneous vacuum tubular component. The solar vacuum heat collection tube is a sandwich vacuum structure composed of an outer glass tube and an inner oxygen-free copper tube. The solar vacuum heat collection tube is sleeved on the heating core and inserted into the installation hole on the central connection box. The other sealed end of the vacuum heat collecting tube is inserted into a rectangular porous fixing seat fixed on the V-shaped corrugated reflective plate. The heat receiving core is a U-shaped hollow copper tube with a ring-shaped cross section. The heat receiving core includes a water inlet pipe, a main body, a water outlet pipe, and an expansion spring. The water inlet pipe and the water outlet pipe are respectively welded at both ends of the main body. The expansion spring is located on the main body. The water inlet pipe and the water outlet pipe are respectively connected to the central connection box. The central connection box is a rectangular box body composed of upper and lower box bodies buckled together. The solar vacuum heat collecting tube fixing seat is a porous rectangular box body installed on the V-shaped corrugated reflective plate.

[0004] Furthermore, the bracket is a triangular stainless steel component.

[0005] Furthermore, the fan-shaped outer diameter of the heating core is consistent with the inner diameter of the inner oxygen-free copper tube, and the heating core is installed in the inner cavity of the inner oxygen-free copper tube. Under the action of the expansion spring, the outer wall of the heating core fits tightly with the inner wall of the inner oxygen-free copper tube.

[0006] Furthermore, the solar vacuum collector tube also includes a selective heat-absorbing material, a vacuum sealing device, a desiccant, a heat-absorbing film, and a positioning piece attached to the outer wall of the inner oxygen-free copper tube. The outer glass tube is a hollow glass tube body with one end closed and the other end open, and its open neck is provided with a ring-shaped platform and an end face sealing groove for strengthening and sealing. The inner oxygen-free copper tube is closed at one end and the other end is open to provide a hollow thin-walled oxygen-free copper tube, and a heat-absorbing material layer is attached to its surface, and the open end is welded to the vacuum sealing device as a whole. The heat-absorbing film is arranged near the closed end of the outer glass tube, the positioning piece is arranged near the inner oxygen-free copper tube and is connected to the closed end of the outer glass tube, and the desiccant is arranged on the inner wall of the positioning piece near one side of the inner oxygen-free copper tube.

[0007] Furthermore, the vacuum sealing device includes a vacuum device body, a vacuum device spiral ring, a sealing cavity, an inflatable copper tube gasket groove with an elliptical cross-section, a connecting thread, an inflatable copper tube gasket with an elliptical cross-section at the end face of the opening end of the outer glass tube, a circular silicone gasket, and a corrugated sleeve. The vacuum sealing device body is provided with a sealing cavity with the inflatable copper tube gasket groove, the inflatable copper tube gasket with an elliptical cross-section is placed in the inflatable copper tube gasket groove, the vacuum device spiral ring, the corrugated sleeve, and the circular silicone gasket are sleeved on the outer glass tube and inserted into the sealing cavity of the sealing device body. The outer glass tube and the inner copper tube are connected into a vacuum whole through the interaction of the annular platform on the outer glass tube, the inflatable copper tube gasket with an elliptical cross-section at the opening end of the outer glass tube, the vacuum device spiral ring, the outer glass tube, the circular silicone sealing ring, and the inflatable copper tube gasket groove with an elliptical cross-section on the vacuum device body and its connecting thread.

[0008] Furthermore, the central connection box is composed of a lower box body, a lower splint, an upper box body, an upper splint, a box body sealing gasket, a solar vacuum collector tube sealing ring, an H-shaped working fluid pipe, an inlet working fluid pipe, and an outlet working fluid pipe. The inlet working fluid pipe and the outlet working fluid pipe are respectively provided with a semicircular card slot for the inlet working fluid pipe and a semicircular card slot for the outlet working fluid pipe. The lower box body and the upper box body are respectively composed of a lower box body shell, an upper box body shell, a lower box body insulation layer, an upper box body insulation layer, a lower box body, and an upper box body; a plurality of semicircular card slots for solar vacuum tubes are respectively provided on both sides of the lower box body and the upper box body; a plurality of semicircular card slots for H-shaped working fluid pipes are respectively provided on the lower splint and the upper splint; the semicircular card slots for the inlet working fluid pipe and the semicircular card slots for the outlet working fluid pipe, the upper box body insulation layer and the lower box insulation layer, which are respectively installed between the lower box shell, the upper box shell and the lower box body and the upper box body; the lower box is installed on the V-shaped corrugated reflector, and the lower clamping plate is fixed to the middle of the lower box, and the inlet pipe, the outlet pipe and the H-shaped working medium pipe are respectively installed in the semicircular grooves of the H-shaped working medium pipe provided on the lower clamping plate and the upper clamping plate, and the water inlet pipe and the water outlet pipe are respectively connected with the corresponding inlet pipe and outlet pipe on the central connecting box, and the lower clamping plate and the upper clamping plate are fixed, and the inlet pipe, the outlet pipe and the H-shaped working medium pipe are fastened in the lower clamping plate and the upper clamping plate, and the lower box, the sealing gasket and the upper box are fastened as a whole by bolts, and a number of solar vacuum tube installation holes are formed on both sides of the central connecting box, and solar vacuum collector tube sealing gaskets are installed in the holes.

[0009] Furthermore, the inlet working fluid pipe on the central connecting box is connected to the external inlet working fluid system, and the outlet working fluid pipe is connected to the external outlet working fluid system.

[0010] Advantages of the invention: The invention forms a high-efficiency photothermal conversion space by changing the material of the heat-absorbing material attachment and constructing a vacuum space setting compatible with the special-shaped material. First, it overcomes the problems of low specific heat capacity, small thermal conductivity and weak photothermal conversion efficiency of the heat-absorbing material attachment. Second, it expands the measures for constructing a vacuum environment with different materials for solar vacuum collector tubes, overcomes the limitations of the materials used for solar vacuum collector tubes, and opens up a new path for the rapid development of glass metal solar vacuum collector tube technology. The setting of the annular cross-section structure of the heated core fan has the following advantages: First, the working fluid entering therein is heated in the form of an annular thin layer of working fluid column, which reduces the heating depth of the heating layer, improves the heating convection capacity of the working fluid, and facilitates rapid heating in a short time. Second, it changes the material of the heated core and enhances the heat conduction capacity. Third, it increases the contact area between the heating layer and the heated core, and improves the heat exchange efficiency. Fourth, it overcomes the defects of large heat loss in technologies such as hot air heating, fin heating, and medium phase-changing heating.

[0011] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0013] Figure 1 It is a schematic diagram of the structure of the present invention;

[0014] Figure 2 This is a schematic diagram of the structure of the solar vacuum heat collection outer glass tube of the present invention;

[0015] Figure 3 It is a schematic diagram of the structure of the inner copper tube of the present invention;

[0016] Figure 4 It is a schematic diagram of the heating core structure of the present invention;

[0017] Figure 5 yes Figure 4 Schematic diagram of the structure of AA;

[0018] Figure 6 It is a schematic diagram of the vacuum space structure of the novel solar collector of the present invention;

[0019] Figure 7 The solar vacuum heat collecting tube of the present invention;

[0020] Figure 8 It is a schematic diagram of the structure of the V-shaped corrugated sheet of the present invention;

[0021] Fig. 9 yes Figure 8 Schematic diagram of the structure of BB;

[0022] Fig.10 It is a schematic structural diagram of a V-shaped reflector of the present invention;

[0023] Fig.11 is a top view of the bracket of the present invention;

[0024] Fig.12 is a front view of the bracket of the present invention;

[0025] Fig.13 It is a structural schematic diagram of the central connection box of the present invention;

[0026] Fig.14 It is a schematic diagram of the structure of the inlet and outlet working medium pipes of the present invention;

[0027] Fig.15It is a structural schematic diagram of the lower box body of the present invention;

[0028] Reference numerals:

[0029] 1 is a bracket, 2 is a V-shaped corrugated reflector, 2a is a frame, 2b is a V-shaped corrugated sheet, 3 is a solar vacuum collector tube, 3a is an outer glass tube, 3a1 is a ring platform, 3a2 is a sealing groove, 3b is an inner oxygen-free copper tube, 3c is a selective heat-absorbing material, 3d is a vacuum sealing device, 3e is a desiccant, 3f is a moisture-absorbing film, 3g is a positioning sheet, 3d1 is a vacuum device body, 3d11 is a sealing slot, 3d1a is a sealing cavity, 3d1b is an inflatable copper tube gasket groove, 3d1c is a connecting thread, 3d2 is a vacuum device screw ring, 3d3 is an inflatable sealing copper tube gasket, 3d4 is a sealing ring, 3d5 is a corrugated sleeve, 4 is a heating core, and 4a is a water inlet Tube, 4b is the outlet pipe, 4c is the expansion spring, 4d is the main body, 5 is the central connection box, 5a is the lower box body, 5b is the lower clamping plate, 5c is the upper box body, 5d is the upper clamping plate, 5e is the sealing gasket, 5f is the sealing ring of the solar vacuum collector tube, 5g is the H-type working fluid pipe, 5h is the inlet working fluid pipe, 5m is the outlet working fluid pipe, 5a1 is the lower box body shell, 5a2 is the lower box body insulation layer, 5a3 is the lower box body, 5b1 is the H-type working fluid pipe semicircular groove, 5b2 is the outlet working fluid pipe semicircular groove, 5c1 is the upper box body shell, 5c2 is the upper box body insulation layer, 5c3 is the upper box body, 5d2 is the outlet working fluid pipe semicircular groove, and 6 is the solar vacuum collector tube fixing seat. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] refer to Figures 1 to 15 ,like Figures 1 to 15As shown, a solar collector is composed of a bracket 1, a V-shaped corrugated reflector 2, a solar vacuum heat collecting tube 3, a heating core 4, a central connection box 5 and a solar vacuum heat collecting tube fixing seat 6. The bracket 1 is a triangular stainless steel component. The V-shaped corrugated reflector 2 is composed of a frame 2a and a V-shaped corrugated sheet 2b, which is installed on the bracket 1. The solar vacuum heat collecting tube 3 is a double-layer heterogeneous vacuum tubular component. The solar vacuum heat collecting tube 3 is a sandwich vacuum structure composed of an outer glass tube 3a and an inner oxygen-free copper tube 3b. The solar vacuum heat collecting tube 3 also includes a selective heat absorbing material 3c attached to the outer wall of the inner oxygen-free copper tube 3b, a vacuum sealing device 3d, a desiccant 3e, a heat absorbing film 3f, and a positioning sheet 3g. The outer glass tube 3a is closed at one end and open at the other end. The hollow glass tube body has an opening neck provided with an annular platform 3a1 for strengthening and sealing and an end face sealing groove 3a2, an inner oxygen-free copper tube 3b is closed at one end, and an opening at the other end is provided with a hollow thin-walled oxygen-free copper tube, and a heat-absorbing material layer 3c is attached to its surface, and the open end is welded to a vacuum sealing device 3d as a whole, a heat-absorbing film 3f is arranged near the closed end of the outer glass tube 3a, a positioning piece 3g is arranged near the inner oxygen-free copper tube 3b and is connected to the closed end of the outer glass tube 3a, a desiccant 3e is arranged on the inner wall of the positioning piece 3g near one side of the inner oxygen-free copper tube 3b, and the vacuum sealing device 3d includes a vacuum device body 3d1, a vacuum device screw ring 3d2, a sealing cavity 3d1a, an elliptical cross-section inflatable copper tube gasket groove 3d1b, and a connecting thread 3d 1c, the end face of the opening end of the outer glass tube is an inflatable sealing copper tube gasket 3d3 with an elliptical cross-section, a circular silicone gasket 3d4, and a corrugated sleeve 3d5, a vacuum sealing device body 3d1 is provided with a sealing cavity 3d1a with an inflatable copper tube gasket groove 3d1b, the inflatable sealing copper tube gasket 3d3 with an elliptical cross-section is placed in the inflatable copper tube gasket groove 3d1b, the vacuum device spiral ring 3d2, the corrugated sleeve 3d5, and the circular silicone gasket 3d4 are sleeved on the outer glass tube 3a and inserted into the sealing cavity 3d1a of the sealing device body 3d1, through the annular platform 3a1 on the outer glass tube 3a, the inflatable sealing copper tube gasket 3d3 with an elliptical cross-section at the opening end of the outer glass tube 3a, the vacuum device spiral ring 3d2, the outer glass tube 3a, the circular silicone seal The ring 3d4, the oval-section inflatable copper tube gasket groove 3d1b on the vacuum device body 3d1 and its connecting thread 3d1c work together to connect the outer glass tube 3a and the inner copper tube 3d into a vacuum whole to form a sealed space, and the air in the interlayer between the outer glass tube 3a and the inner copper tube 3b is extracted to achieve vacuumization of the interlayer space. The main function of the bellows 3d5 is to reduce pressure when thermally expanded to avoid damage to the outer glass tube 3a. The bellows 3d5 does not have a sealing effect. Its sealing parts: the oval-section inflatable copper tube gasket groove 3d1b on the end face of the outer glass tube 3a, the oval-section inflatable copper tube gasket 3d3 and the oval-section inflatable copper tube gasket groove 3d1b on the sealing device body cooperate to play a sealing role.Changing from glass material (specific heat capacity of about 900 J / mgk, thermal conductivity of about 1.2w / mk) to oxygen-free copper material (specific heat capacity of 398 J / kgk, thermal conductivity of 377w / mk), under the same conditions, the specific heat capacity is increased by 2 times, and the thermal conductivity is increased by 331 times, which greatly enhances the light-heat conversion capacity and makes solar energy collection with low energy density more effective. The setting of the vacuum sealing device scientifically establishes a vacuum space compatible with special-shaped materials, overcomes the technical bottlenecks of limited use of high-quality materials with high specific heat capacity and high thermal conductivity, and the difficulty of melting and sealing materials with different thermal expansion rates, and increases the reliable use temperature of the glass-metal solar vacuum collector tube from the current 300°C to 500°C. , laying a solid foundation for the high-temperature application of solar energy technology, and opening up a new path for the development and application of glass-metal solar vacuum collector tubes. The other sealed end of the solar vacuum collector tube 3 is inserted into a rectangular porous fixing seat fixed on the V-shaped corrugated reflector 2. The heating core 4 is a U-shaped hollow copper tube with a ring-shaped cross section. The fan-shaped outer diameter of the heating core 4 is consistent with the inner diameter of the inner oxygen-free copper tube 3b. The heating core 4 is installed in the inner cavity of the inner oxygen-free copper tube 3b. Under the action of the expansion spring 4c, the outer wall of the heating core 4 is tightly fitted with the inner wall of the inner oxygen-free copper tube 3b. The heating core 4 of the present invention adopts a ring-shaped cross-section structure. The reasons are: first, the outer layer of the heating core 4 is tightly attached to the inner wall heating layer of the inner copper tube 3b. , increasing the heating area and improving the heat conduction between the heating body and the heated body. Second, the working fluid entering therein is heated by a thin layer of annular cross-section column instead of cylindrical radial heating, which reduces the heating depth of the heating layer and improves the heat convection capacity of the working fluid, facilitating rapid heating in a short time. Third, the heating core is made of copper material, which improves the heat capacity ratio and thermal conductivity of the heating core, so that the heat of the heating layer is quickly transferred to the heating core 4 to heat the working fluid, thereby improving the heat exchange efficiency. Fourth, it effectively overcomes the defects of large heat loss in existing hot air heating, fin heating, and medium phase-changing heating technologies. The heating core 4 includes an inlet pipe 4a, a body 4d, an outlet pipe 4b, and an expansion spring 4c. The inlet pipe 4 a, the outlet pipe 4b are welded at both ends of the body 4 respectively, the expansion spring 4c is located on the body 4, the water inlet pipe 4a, the outlet pipe 4b are connected to the central connection box 5 respectively, the central connection box 5 is a rectangular box body with upper and lower boxes buckled together, the central connection box 5 is composed of a lower box body 5a, a lower clamping plate 5b, an upper box body 5c, an upper clamping plate 5d, a box body sealing gasket 5e, a solar vacuum collector tube sealing ring 5f, an H-shaped working fluid pipe 5g, an inlet working fluid pipe 5h, and an outlet working fluid pipe 5m. The inlet working fluid pipe 5h and the outlet working fluid pipe 5m are respectively provided with a semicircular slot 5b2 for the inlet working fluid pipe and a semicircular slot 5d2 for the outlet working fluid pipe. The lower box body 5a and the upper box body 5c are respectively composed of a lower box body shell 5a1 and an upper box body shell 5c1.The lower box insulation layer 5a2, the upper box insulation layer 5c2, the lower box body 5a3, and the upper box body 5c3 are respectively composed; the lower box body 5a3 and the upper box body 5c3 are respectively provided with a plurality of semicircular slots 5a31 for solar vacuum tubes; the lower clamping plate 5b and the upper clamping plate 5d are respectively provided with a plurality of H-shaped semicircular slots 5b1 for guiding working medium pipes; the semicircular slots 5b2 for the inlet working medium pipe and the semicircular slots 5d2 for the outlet working medium pipe, the upper box insulation layer 5a2 and the lower box insulation layer 5c2, respectively installed between the lower box shell 5a1, the upper box shell 5c1 and the lower box body 5a3, the upper box body 5c3; the lower box 5a is installed on the V-shaped corrugated reflector 2, the lower clamping plate 5b is fixed to the middle of the lower box 5a, the inlet pipe 5h, the outlet pipe 5m, and the H-type guiding pipe 5g are respectively installed in the H-type guiding pipe semicircular groove 5b1 provided on the lower clamping plate 5b and the upper clamping plate 5d, and the water inlet pipe 4a and the water outlet pipe 4b are respectively connected to the middle The corresponding inlet working pipe 5h and outlet working pipe 5m on the central connection box 5 are connected, the lower clamping plate 5b and the upper clamping plate 5d are fixed, the inlet working pipe 5h, the outlet working pipe 5m, and the H-shaped working pipe 5g are fastened in the lower clamping plate 5b and the upper clamping plate 5d, the lower box body 5a, the sealing gasket 5e and the upper box body 5c are fastened as a whole by bolts, and a number of solar vacuum tube installation holes are formed on both sides of the central connection box 5. The solar vacuum collector tube sealing gasket 5f is installed in the hole. The inlet working medium pipe 5h is connected to the external inlet working medium system, and the outlet working medium pipe 5m is connected to the external outlet working medium system, thereby forming a complete circulating working medium channel. The purpose of such arrangement is, firstly, to connect all the working medium pipes as a whole, which is convenient for installation and maintenance, and secondly, to make all the connecting sections of the working medium pipes and the inlet and outlet working medium pipes of the heated core 4 all contained in the central connection box 5, so as to reduce heat dissipation loss. The solar vacuum heat collecting tube fixing seat 6 is a porous rectangular box, which is installed on the V-shaped corrugated reflector 2, wherein, Fig.14 It can be the inlet working fluid pipe 5h or the outlet working fluid pipe 5m, and the structures between the two are the same, so they are not marked with reference numerals.

[0032] The present invention forms a high-efficiency photothermal conversion space by changing the material of the heat-absorbing material attachment and constructing a vacuum space setting that is compatible with the special-shaped material, thereby overcoming the problems of low specific heat capacity, small thermal conductivity and weak photothermal conversion efficiency of the heat-absorbing material attachment; expanding the measures for constructing a vacuum environment with different materials for solar vacuum collector tubes, overcoming the limitation of the materials used for solar vacuum collector tubes, and opening up a new path for the rapid development of glass metal solar vacuum collector tube technology. The setting of the annular cross-section structure of the heated core fan has the following advantages: the working fluid entering therein is heated in the form of an annular thin layer of working fluid column, which reduces the heating depth of the heating layer, improves the heating convection capacity of the working fluid, and facilitates rapid heating in a short time; changes the material of the heated core and enhances the heat conduction capacity; increases the contact area between the heating layer and the heated core, and improves the heat exchange efficiency; overcomes the defects of large heat loss in technologies such as hot air heating, fin heating, and medium phase-changing heating.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A solar thermal collector, characterized in that: The invention comprises a support (1), a V-shaped corrugated reflector (2), a solar vacuum heat collecting tube (3), a heat receiving core (4), a central connection box (5) and a solar vacuum heat collecting tube fixing seat (6); the V-shaped corrugated reflector (2) comprises a frame (2a) and a V-shaped corrugated sheet (2b) and is installed on the support (1); the solar vacuum heat collecting tube (3) is a double-layer heterogeneous vacuum tubular component; the solar vacuum heat collecting tube (3) comprises a sandwich vacuum structure consisting of an outer glass tube (3a) and an inner oxygen-free copper tube (3b); the solar vacuum heat collecting tube (3) is sleeved on the heat receiving core (4) and inserted into the installation hole on the central connection box (5); the other sealed end of the solar vacuum heat collecting tube (3) is inserted into the installation hole on the central connection box (5); The solar energy vacuum heat collecting tube fixing seat (6) is a rectangular multi-hole fixing seat fixed on the V-shaped corrugated reflector (2); the heating core (4) is a U-shaped hollow copper tube with a circular cross section; the heating core (4) comprises a water inlet pipe (4a), a body (4d), a water outlet pipe (4b), and an expansion spring (4c); the water inlet pipe (4a) and the water outlet pipe (4b) are respectively welded to two ends of the body (4d); the expansion spring (4c) is located on the body (4d); the water inlet pipe (4a) and the water outlet pipe (4b) are respectively connected to the central connection box (5); the central connection box (5) is a rectangular box body composed of an upper box body and a lower box body; the solar energy vacuum heat collecting tube fixing seat (6) is a multi-hole rectangular box body, which is installed on the V-shaped corrugated reflector (2); The central connection box (5) is composed of a lower box body (5a), a lower clamping plate (5b), an upper box body (5c), an upper clamping plate (5d), a box body sealing gasket (5e), ​​a solar vacuum heat collecting tube sealing ring (5f), an H-shaped working fluid guide pipe (5g), an inlet working fluid pipe (5h), and an outlet working fluid pipe (5m); the inlet working fluid pipe (5h) and the outlet working fluid pipe (5m) are respectively provided with an inlet working fluid pipe semicircular clamping groove (5b2) and an outlet working fluid pipe semicircular clamping groove (5d2); the lower box body (5a) and the upper box body (5c) are respectively composed of a lower box body shell (5a1) and an upper box body shell (5c1). The invention is characterized in that the invention comprises a lower box body insulation layer (5a2), an upper box body insulation layer (5c2), a lower box body (5a3), and an upper box body (5c3); a plurality of solar vacuum tube semicircular card slots (5a31) are respectively arranged on both sides of the lower box body (5a3) and the upper box body (5c3); a plurality of H-shaped working fluid pipe semicircular card slots (5b1) are respectively arranged on the lower clamping plate (5b) and the upper clamping plate (5d); the inlet working fluid pipe semicircular card slot (5b2) and the outlet working fluid pipe semicircular card slot (5d2), the upper box body insulation layer (5c2), and the lower box body insulation layer (5c3); The lower box (5a) is mounted on the V-shaped corrugated reflective plate (2); the lower clamping plate (5b) is fixed to the middle of the lower box (5a); the inlet pipe (5h), outlet pipe (5m) and H-shaped working fluid pipe are respectively installed in the H-shaped working fluid pipe semicircular groove (5b1) provided on the lower clamping plate (5b) and the upper clamping plate (5d); the water inlet pipe (4a) and the water outlet pipe (4b) are respectively connected to the central connection box ( 5) and the corresponding inlet working fluid pipe (5h) and outlet working fluid pipe (5m) are connected, the lower clamping plate (5b) and the upper clamping plate (5d) are fixed, the inlet working fluid pipe (5h), the outlet working fluid pipe (5m) and the H-shaped working fluid pipe (5g) are fastened in the lower clamping plate (5b) and the upper clamping plate (5d), the lower box body (5a), the sealing gasket (5e) and the upper box body (5c) are fastened together as a whole by bolts, and a plurality of solar vacuum tube installation holes are formed on both sides of the central connection box (5), and the solar vacuum heat collection tube sealing rings (5f) are installed in the holes; the bracket (1) is a triangular stainless steel component.

2. The solar thermal collector according to claim 1, characterized in that: The fan-shaped outer diameter of the heating core (4) is consistent with the inner diameter of the inner oxygen-free copper tube (3b), and the heating core (4) is installed in the inner cavity of the inner oxygen-free copper tube (3b). Under the action of the expansion spring (4c), the outer wall of the heating core (4) and the inner wall of the inner oxygen-free copper tube (3b) are tightly fitted.

3. The solar thermal collector according to claim 1, characterized in that: The solar vacuum heat collecting tube (3) further comprises a selective heat absorbing material (3c) attached to the outer wall of the inner oxygen-free copper tube (3b), a vacuum sealing device (3d), a desiccant (3e), a heat absorbing film (3f), and a positioning sheet (3g). The outer glass tube (3a) is a hollow glass tube body with one end closed and the other end open, and the neck of the opening is provided with a ring-shaped platform (3a1) and an end face sealing groove (3a2) for strengthening and sealing. The inner oxygen-free copper tube (3b) is a One end is closed, and the other end is open and provided with a hollow thin-walled oxygen-free copper tube, and a heat-absorbing material layer is attached to the surface of the tube. The open end is welded to a vacuum sealing device (3d) as a whole. The heat-absorbing film (3f) is arranged near the closed end of the outer glass tube (3a). The positioning piece (3g) is arranged near the inner oxygen-free copper tube (3b) and connected to the closed end of the outer glass tube (3a). The desiccant (3e) is arranged on the inner wall of the positioning piece (3g) near one side of the inner oxygen-free copper tube (3b).

4. The solar thermal collector according to claim 3, characterized in that: The vacuum sealing device (3d) comprises a vacuum device body (3d1), a vacuum device spiral ring (3d2), a sealing cavity (3d1a), an inflatable copper tube gasket groove (3d1b) with an elliptical cross-section, a connecting thread (3d1c), an inflatable copper tube gasket (3d3) with an elliptical cross-section at the end face of the opening of the outer glass tube, a round silicone gasket (3d4), and a corrugated sleeve (3d5). The vacuum device body (3d1) is provided with a sealing cavity (3d1a) with the inflatable copper tube gasket groove (3d1b), the inflatable copper tube gasket (3d3) with an elliptical cross-section is placed in the inflatable copper tube gasket groove (3d1b), and the vacuum device spiral ring (3d2) and the corrugated sleeve The tube (3d5) and the circular silicone gasket (3d4) are sleeved on the outer glass tube (3a) and inserted into the sealed cavity (3d1a) of the vacuum device body (3d1). The outer glass tube (3a) and the inner oxygen-free copper tube (3b) are connected into a vacuum whole through the interaction of the annular platform (3a1) on the outer glass tube (3a), the gas-filled sealing copper tube gasket (3d3) with an elliptical cross-section at the open end of the outer glass tube (3a), the vacuum device spiral ring (3d2), the outer glass tube (3a), the circular silicone gasket (3d4), and the gas-filled copper tube gasket groove (3d1b) with an elliptical cross-section on the vacuum device body (3d1) and its connecting thread (3d1c).

5. The solar thermal collector according to claim 1, characterized in that: The inlet working fluid pipe (5h) on the central connection box (5) is connected to an external inlet working fluid system, and the outlet working fluid pipe (5m) is connected to an external outlet working fluid system.

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