A passive building roof structure

Abstract

The present application relates to a passive building roof structure, and relates to the field of passive buildings, including a solar air collector installed on the roof, and also including a cleaning mechanism and two mounting plates, wherein the cleaning mechanism includes a lead screw threadedly connected between the two mounting plates and a guide rod fixed between the two mounting plates, a brush assembly that contacts the upper surface of the solar air collector is threadedly connected to the lead screw, a driving motor that drives the lead screw to rotate is connected to the lead screw, the brush assembly is slidably connected to the guide rod, a drainage groove is provided on the upper surface of the solar air collector, and the two mounting plates are vertically telescopic to drive the brush assembly to disengage from or enter the drainage groove. The present application has the effect of saving manpower to clean impurities on the upper surface of the solar air collector.

Description

Technical Field

[0001] The present application relates to the field of passive buildings, and in particular to a passive building roof structure. Background Art

[0002] Passive buildings are buildings that rely on their own structural design to use renewable energy to achieve a comfortable indoor temperature and meet the requirements of "warm in winter and cool in summer". They do not need to install separate heating or cooling facilities. Their purpose is energy conservation and environmental protection. Solar air collectors have unique advantages such as fast start-up, no antifreeze problems, simple structure, and low cost, and can be widely used in building heating.

[0003] The roof of an existing passive building is usually equipped with a solar air collector. In windy and rainy weather, some impurities are easily blown onto the upper surface of the solar air collector.

[0004] In order to facilitate the cleaning of impurities on the solar air collector and improve the working efficiency of the solar air collector, people are often required to climb onto the roof and clean the impurities on the upper surface of the solar air collector, which is a waste of manpower. Summary of the invention

[0005] In order to save manpower in cleaning impurities on the upper surface of a solar air collector, the present application provides a passive building roof structure.

[0006] The passive building roof structure provided in this application adopts the following technical solution:

[0007] A passive building roof structure includes a solar air collector installed on the roof, and also includes a cleaning mechanism and two mounting plates. The cleaning mechanism includes a screw threadedly connected between the two mounting plates and a guide rod fixed between the two mounting plates. A brush assembly that abuts against the upper surface of the solar air collector is threadedly connected to the screw. A driving motor that drives the screw to rotate is connected to the screw. The brush assembly is slidably connected to the guide rod. A drainage groove is provided on the upper surface of the solar air collector. The two mounting plates are vertically extended and retracted to drive the brush assembly to detach from or enter the drainage groove.

[0008] By adopting the above technical solution, the drive motor is started, and the output shaft of the drive motor drives the lead screw to rotate, and the rotation of the lead screw drives the brush assembly to move along the length direction of the guide rod, and the brush assembly cleans the upper surface of the solar air collector. When the cleaning is completed, the brush assembly is controlled to move to the top of the drain groove, and then the two mounting plates are adjusted to retract vertically. At this time, the two mounting plates drive the brush assembly to gradually enter the drain groove through the lead screw and the guide rod, reducing the occurrence of the brush assembly blocking the sunlight shining on the solar air collector. And when it is necessary to clean the upper surface of the solar air collector, it is only necessary to adjust the two mounting plates to drive the brush assembly out of the drain groove, and start the drive motor to drive the brush assembly to move along the solar air collector.

[0009] Preferably, the brush assembly includes a support shell, a support plate is slidably connected inside the support shell, a plurality of brushes are fixedly connected to the bottom surface of the support plate, the lower ends of the plurality of brushes pass through the bottom wall of the support shell and contact the upper surface of the solar air collector, and an adjusting part is connected to the support plate to drive the support plate to move in a direction close to the solar air collector.

[0010] By adopting the above technical solution, the brush cleans the upper surface of the solar air collector. When the brush is worn and thus difficult to contact the upper surface of the solar air collector, the support plate is driven by the adjusting member to move toward the solar air collector until the brush is pressed against the upper surface of the solar air collector. The setting of the adjusting member facilitates the adjustment of the brush to always be pressed against the upper surface of the solar air collector.

[0011] Preferably, the adjusting member includes a threaded rod that passes through the upper surface of the supporting shell and is threadedly connected to the supporting shell, the threaded rod includes a threaded main rod at one end rotatably connected to the supporting plate, and also includes at least one threaded single rod, a surface of the threaded main rod away from the supporting plate and a surface of each of the threaded single rods are provided with threaded holes, a surface of each of the threaded single rods away from the threaded hole is fixedly connected to a connecting rod, and each connecting rod is threadedly connected to the threaded hole on the adjacent threaded single rod.

[0012] By adopting the above technical solution, the threaded rod is rotated, and the rotation of the threaded rod can drive the support plate and the brush to move in the direction close to the solar air collector, so that the distance between the brush and the solar air collector can be adjusted. When the support plate needs to move a long distance in the direction close to the solar air collector, the number of threaded single rods superimposed on the threaded main rod is increased, so that the length of the threaded rod can be adjusted, thereby facilitating the support plate to move a long distance in the direction close to the solar air collector.

[0013] Preferably, the support shell includes an upper support shell and a lower support shell, the upper support shell is sleeved on the outer side of the lower support shell and the upper support shell is slidably connected to the lower support shell, a connecting spring is fixedly connected between the upper support shell and the lower support shell, the lower ends of several of the brushes pass through the lower surface wall of the lower support shell, and a transmission component is connected to the support shell to drive the lower support shell to move toward or away from the upper support shell.

[0014] By adopting the above technical solution, when the brush assembly finishes cleaning the solar air collector, the transmission assembly drives the lower support shell to move away from the upper support shell. At this time, the lower support shell moves relative to the brush to push larger impurities adhered to the brush away from the brush, making it easier to clean the larger impurities adhered to the brush.

[0015] Preferably, two sliding grooves are provided on an inner side wall of the upper support shell, and the transmission assembly includes a sliding block slidably connected to each sliding groove, each sliding block is fixedly connected to an inner wall of the corresponding sliding groove with a spring, an upper connecting rod and a lower connecting rod are hinged on one side of each sliding block, the two upper connecting rods are gradually tilted upward in a direction of approaching each other and are hinged to each other, the two lower connecting rods are gradually tilted downward in a direction of approaching each other and are hinged to each other, the hinge of the lower connecting rod abuts against the lower inner wall of the lower support shell, the lower inner wall of the lower support shell is provided with a through hole, and the bottom wall of the drainage groove is fixedly connected with an adjusting rod; when the brush assembly gradually enters the drainage groove, one end of the adjusting rod passes through the through hole and pushes the hinge of the two upper connecting rods upward.

[0016] By adopting the above technical solution, when the brush assembly gradually enters the drain groove, one end of the adjustment rod passes through the through hole and pushes the hinge of the two upper connecting rods upward, and the two upper connecting rods move in a direction close to each other. The movement of the two upper connecting rods drives the two sliding blocks to move in a direction close to each other, and the movement of the two sliding blocks drives the two lower connecting rods to move in a direction close to each other. At this time, the hinge of the two lower connecting rods pushes the lower support shell downward, and the lower support shell moves downward relative to the upper support shell and scrapes off the larger impurities on the brush. The impurities separated from the brush fall into the drain groove for collection, and the operation is simple and convenient.

[0017] Preferably, both ends of the drainage groove pass through the solar air collector, the upper surface of the solar air collector gradually inclines toward the drainage groove, and the bottom surface of the drainage groove is an inclined surface.

[0018] By adopting the above technical solution, the drainage trough is convenient for collecting rainwater falling on the solar air collector, and the rainwater entering the drainage trough slides down along the bottom surface of the drainage trough and leaves the drainage trough, which is convenient for the centralized discharge of rainwater.

[0019] Preferably, the mounting plate comprises an upper mounting plate and a lower mounting plate, the lower surface of the upper mounting plate is provided with an upper mounting opening, the upper surface of the lower mounting plate is provided with a lower mounting opening, the lower mounting plate is inserted into the upper mounting opening, the bottom surface of the lower mounting opening is fixedly connected with a driving cylinder, and the piston rod of the driving cylinder is fixedly connected to the bottom wall of the upper mounting opening.

[0020] By adopting the above technical solution, the brush assembly can be easily controlled to rise and fall by starting the driving cylinder. The driving cylinder is located inside the mounting plate, and the mounting plate has a certain protective effect on the driving cylinder.

[0021] Preferably, a sleeve is fixedly connected to the bottom wall of the lower mounting opening, a sleeve rod is fixedly connected to the bottom wall of the lower mounting opening, and the sleeve rod is slidably connected to the sleeve.

[0022] By adopting the above technical solution, when the upper mounting plate moves relative to the lower mounting plate, the sleeve rod and the sleeve tube move relative to each other, and the sleeve rod and the sleeve tube provide guidance for the movement of the upper mounting plate and the brush assembly.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The brush assembly can be used to clean the upper surface of the solar air collector. After cleaning, the brush assembly can be moved into the drainage trough to reduce the occurrence of the brush assembly blocking sunlight;

[0025] 2. The setting of the adjustment piece facilitates the adjustment of the brush to always be in good contact with the upper surface of the solar air collector;

[0026] 3. The lower support shell moves relative to the brush to clean the larger impurities adhering to the brush. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the roof structure according to an embodiment of the present application.

[0028] Figure 2 It is a schematic diagram of the structure of the installation plate according to an embodiment of the present application.

[0029] Figure 3 It is a schematic diagram of the structure of a brush assembly according to an embodiment of the present application.

[0030] Figure 4 It is a schematic diagram of the structure of the embodiment of the present application showing the connection between the brush assembly and the drain groove.

[0031] Figure 5 It is a manifestation Figure 4 Enlarged view of point A in the middle.

[0032] Description of reference numerals: 1, solar air collector; 11, drainage groove; 2, cleaning mechanism; 21, guide rod; 22, lead screw; 23, drive motor; 24, brush assembly; 241, support shell; 2411, upper support shell; 24111, shell groove; 24112, sliding groove; 2412, lower support shell; 24121, shell plate; 24122, connecting plate; 24123, through hole; 242, support plate; 243, screw Threaded rod; 2431, threaded rod; 2432, threaded single rod; 24321, threaded hole; 24322, connecting rod; 3, mounting plate; 31, upper mounting plate; 311, upper mounting port; 32, lower mounting plate; 321, lower mounting port; 33, driving cylinder; 34, sleeve; 35, sleeve rod; 4, transmission assembly; 41, sliding block; 42, spring; 43, upper connecting rod; 44, lower connecting rod; 5, connecting spring; 6, adjusting rod. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-Figure 5 This application is described in further detail.

[0034] The present application embodiment discloses a passive building roof structure. Figure 1 The passive building roof structure includes a solar air collector 1 fixedly connected to the roof, and the solar air collector 1 is arranged in a horizontal direction. A cleaning mechanism 2 for cleaning the upper surface of the solar air collector 1 is installed on the roof.

[0035] Two mounting plates 3 are installed on the upper surface of the roof, and the solar air collector 1 is located between the two mounting plates 3. The cleaning mechanism 2 includes a guide rod 21 fixedly connected between the two mounting plates 3, and also includes a lead screw 22 arranged between the two mounting plates 3, and each end of the lead screw 22 is threadedly connected to a corresponding mounting plate 3. A drive motor 23 is fixedly connected to a side of one of the mounting plates 3 away from the solar air collector 1, and the output shaft of the drive motor 23 passes through the mounting plate 3 and is threadedly connected to the lead screw 22.

[0036] A brush assembly 24 is provided above the solar air collector 1, one end of the brush assembly 24 is penetrated by the lead screw 22 and is threadedly connected to the lead screw 22, and the other end is penetrated by the guide rod 21 and is slidably connected to the guide rod 21. Both the lead screw 22 and the guide rod 21 are arranged along the length direction of the solar air collector 1.

[0037] The drive motor 23 is started, and the output shaft of the drive motor 23 rotates to drive the lead screw 22 to rotate, and the lead screw 22 rotates to drive the brush assembly 24 to move along the length direction of the solar air collector 1, so that the brush assembly 24 cleans the upper surface of the solar air collector 1. The guide rod 21 provides a guide for the movement of the brush assembly 24.

[0038] Two drainage grooves 11 are provided on the upper surface of the solar air collector 1, and the two drainage grooves 11 are located at both ends of the length direction of the solar air collector 1. Both ends of the length direction of each drainage groove 11 penetrate the solar air collector 1, and the upper surface of the solar air collector 1 gradually slopes downward from the middle toward the drainage grooves 11 at both ends. When encountering rainy weather, rainwater can be discharged along the two drainage grooves 11 in a relatively concentrated manner.

[0039] The bottom wall of each drainage groove 11 gradually slopes downward in the same direction, so that water and other impurities in the drainage groove 11 can slide down smoothly.

[0040] Reference Figure 1 and Figure 2 In order to reduce the situation where the mounting plate 3 and the cleaning mechanism 2 block the sunlight irradiating on the solar air collector 1, the mounting plate 3 can be vertically retracted.

[0041] The mounting plate 3 includes an upper mounting plate 31 and a lower mounting plate 32. The lower surface of the upper mounting plate 31 is provided with an upper mounting opening 311, and the lower surface of the lower mounting plate 32 is provided with a lower mounting opening 321. The outer bottom surface of the lower mounting plate 32 is fixedly connected to the roof, and the upper end of the lower mounting plate 32 extends into the upper mounting opening 311 and is plugged into the upper mounting plate 31. A driving member for pushing the upper mounting plate 31 to move up and down is installed in the lower mounting opening 321. The driving member is a driving cylinder 33, which is fixed to the bottom wall of the lower mounting opening 321. The piston rod of the driving cylinder 33 is vertically upward and fixedly connected to the bottom wall of the upper mounting opening 311. Both the lead screw 22 and the guide rod 21 are connected to the upper mounting plate 31 in each mounting plate 3.

[0042] The solar air collector 1 is located between the lead screw 22 and the guide rod 21. When the brush assembly 24 moves to the top of one of the drainage grooves 11, the driving cylinder 33 is started, and the piston rod of the driving cylinder 33 is retracted to drive the upper mounting plate 31 to descend. The descent of the upper mounting plate 31 can drive the lead screw, the guide rod 21 and the brush assembly 24 to descend, so that the brush assembly 24 gradually descends and enters one of the drainage grooves 11, reducing the occurrence of the brush assembly 24 and the upper mounting plate 31 blocking the sunlight irradiating on the solar air collector 1.

[0043] The bottom wall of each lower mounting opening 321 is fixedly connected to two sleeves 34, and the bottom wall of each upper mounting opening 311 is fixedly connected to two sleeve rods 35. One sleeve 34 corresponds to one sleeve rod 35, and the lower end of each sleeve rod 35 is inserted into the corresponding sleeve 34 and slidably connected with the sleeve 34.

[0044] When the upper mounting plate 31 moves vertically relative to the lower mounting plate 32 , each sleeve rod 35 slides along the corresponding sleeve 34 , and the sleeve rod 35 and the sleeve 34 provide a guide for the movement of the upper mounting plate 31 .

[0045] Reference Figure 1 and Figure 3 The brush assembly 24 includes a support shell 241 of a hollow structure, a support plate 242 is vertically slidably connected inside the support shell 241, a plurality of brushes are fixedly connected to the lower surface of the support plate 242, and the lower ends of the plurality of brushes all penetrate the bottom wall of the support shell 241 and extend out of the support shell 241. An adjusting member is connected to the support plate 242 to drive the support plate 242 to move toward the direction of the solar air collector 1.

[0046] The adjusting member includes two threaded rods 243, each threaded rod 243 penetrates the upper surface of the support shell 241 and is threadedly connected to the support shell 241, and the lower end of each threaded rod 243 extends into the support shell 241 and is rotatably connected to the support plate 242. By rotating the threaded rod 243, the threaded rod 243 can drive the support plate 242 and the brush to move in a direction close to the solar air collector 1 and press against the upper surface of the solar air collector 1. When the lower end of the brush is worn and thus difficult to press against the solar air collector 1, the lower end of the brush can be adjusted to press against the solar air collector 1 by rotating the two threaded rods 243 at the same time.

[0047] The threaded rod 243 includes a threaded main rod 2431 at the bottom and a threaded single rod 2432 located above the threaded main rod 2431. The upper surfaces of the threaded main rod 2431 and the upper surfaces of the threaded single rod 2432 are both provided with threaded holes 24321. The lower surface of the threaded single rod 2432 is fixedly connected with a connecting rod 24322 for threaded connection with the threaded hole 24321. When the support plate 242 needs to move a large distance in the direction close to the solar air collector 1, the length of the threaded rod 243 can be adjusted by adjusting the number of the threaded single rods 2432 installed on the threaded main rod 2431, thereby adjusting the distance that the threaded rod 243 pushes the support plate 242 to move.

[0048] In order to facilitate the cleaning of larger impurities adhered to the brush, the support shell 241 includes an upper support shell 2411 and a lower support shell 2412. Both the lead screw 22 and the guide rod 21 are connected to the upper support shell 2411. The lower support shell 2412 is connected to a transmission component 4 that drives the lower support shell 2412 to move toward or away from the upper support shell 2411.

[0049] When the transmission component 4 drives the lower support shell 2412 to move in a direction away from the upper support shell 2411, the lower support shell 2412 combs the part of the brush placed on the outside of the support shell 241, so that larger impurities adhering to the lower end of the brush can be separated from the brush. When the lower support shell 2412 moves to the farthest distance from the upper support shell 2411, the lower end of the brush still has a part of the outer side of the support shell 241, which reduces the situation that the lower end of the brush is difficult to re-extend into the outer side of the support shell 241 after the lower support shell 2412 is reset in a direction close to the upper support shell 2411.

[0050] The lower surface of the upper support shell 2411 is provided with a shell groove 24111, and the lower support shell 2412 includes a shell plate 24121 plugged into the opening of the shell groove 24111. Both ends of the shell plate 24121 are fixedly connected with connecting plates 24122, and each connecting plate 24122 is arranged perpendicular to the shell plate 24121. Each connecting plate 24122 is inserted into the shell groove 24111 and is slidably connected to the shell groove 24111. A connecting spring 5 is connected between each connecting plate 24122 and the upper support shell 2411, and one end of each connecting spring 5 is fixedly connected to the connecting plate 24122, and the other end is fixedly connected to the bottom wall of the shell groove 24111.

[0051] Reference Figure 3 , Figure 4 and Figure 5 , one side wall of the housing groove 24111 is provided with two horizontally arranged sliding grooves 24112, the transmission assembly 4 comprises a sliding block 41 slidably connected to each sliding groove 24112, each sliding groove 24112 is provided with a spring 42, one end of the spring 42 is fixedly connected to one side wall of the sliding groove 24112, and the other end is fixedly connected to the sliding block 41. An upper connecting rod 43 is hingedly connected to one side wall of each sliding block 41, the two upper connecting rods 43 gradually tilt upwards in a direction of approaching each other, and the ends of the two upper connecting rods 43 approaching each other are hinged to each other. A lower connecting rod 44 is also hingedly connected to one side wall of each sliding block 41, the two lower connecting rods 44 gradually tilt downwards in a direction of approaching each other, the ends of the two lower connecting rods 44 approaching each other are hinged to each other, and the hinges of the two lower connecting rods 44 abut against the upper surface of the housing plate 24121, at which time each spring 42 is in a normal state.

[0052] The upper surface of the shell plate 24121 is provided with a through hole 24123 that penetrates the shell plate 24121, and the bottom surface of each drain groove 11 is fixedly connected with an adjustment rod 6. When the brush assembly 24 gradually moves into one of the drain grooves 11, the upper end of the adjustment rod 6 penetrates through the through hole 24123 and hits the hinge of the two upper connecting rods 43. When the brush assembly 24 continues to move toward the bottom wall of the drain groove 11, the upper end of the adjustment rod 6 pushes the hinge of the two upper connecting rods 43 upward, and at this time, the two upper connecting rods 43 gradually rotate in a direction approaching each other, and the movement of the upper connecting rod 43 drives the two sliding blocks 41 to move in a direction approaching each other, and the movement of the sliding block 41 drives the two lower connecting rods 44 to move in a direction approaching each other. In this way, the hinge of the two lower connecting rods 44 pushes the shell plate 24121 downward, and the shell plate 24121 moves downward relative to the upper support shell 2411.

[0053] When the shell plate 24121 moves downward relative to the upper support shell 2411, the impurities on the brush pushed off by the shell plate 24121 fall into the drainage groove 11, and the connecting spring 5 and the spring 42 are both in a stretched state.

[0054] The implementation principle of a passive building roof structure in the embodiment of the present application is as follows: when the upper surface of the solar air collector 1 needs to be cleaned, the two driving cylinders 33 are started at the same time, and the piston rods of the two driving cylinders 33 extend upward to push the upper mounting plate 31 upward. The upper mounting plate 31 moves upward, thereby driving the lead screw 22, the guide rod 21 and the brush assembly 24 to gradually move upward.

[0055] When the brush assembly 24 moves upward and gradually separates from the drain trough 11, the adjustment rod 6 gradually separates from the hinge of the two upper connecting rods 43. At this time, the two sliding blocks 41 gradually move away from each other under the influence of the elastic force of the spring 42, and the hinge of the two lower connecting rods 44 gradually moves upward. The lower support shell 2412 gradually moves upward and resets under the action of the connecting spring 5.

[0056] Restart the drive motor 23, the output shaft of the drive motor 23 drives the screw 22 to rotate, the rotation of the screw 22 drives the brush assembly 24 to gradually move along the length direction of the solar air collector 1, and the brush assembly 24 cleans the impurities on the upper surface of the solar air collector 1 into the drainage grooves 11 at both ends of the solar air collector 1.

[0057] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A passive building roof structure, comprising a solar air collector (1) installed on the roof, characterized in that: The invention also comprises a cleaning mechanism (2) and two mounting plates (3), wherein the cleaning mechanism (2) comprises a lead screw (22) threadedly connected between the two mounting plates (3) and a guide rod (21) fixed between the two mounting plates (3), a brush assembly (24) threadedly connected to the lead screw (22) and abutting against the upper surface of the solar air collector (1), a driving motor (23) for driving the lead screw (22) to rotate is connected to the lead screw (22), the brush assembly (24) is slidably connected to the guide rod (21), a drainage groove (11) is provided on the upper surface of the solar air collector (1), and the two mounting plates (3) are vertically extended and retracted to drive the brush assembly (24) to leave or enter the drainage groove (11).

2. A passive building roof structure according to claim 1, characterized in that: The brush assembly (24) comprises a support shell (241), a support plate (242) being slidably connected inside the support shell (241), a plurality of brushes being fixedly connected to the bottom surface of the support plate (242), the lower ends of the plurality of brushes passing through the bottom wall of the support shell (241) and contacting the upper surface of the solar air collector (1), and an adjusting member for driving the support plate (242) to move in a direction close to the solar air collector (1) being connected to the support plate (242).

3. A passive building roof structure according to claim 2, characterized in that: The adjusting member comprises a threaded rod (243) penetrating the upper surface of the supporting shell (241) and threadedly connected to the supporting shell (241), the threaded rod (243) comprising a threaded main rod (2431) having one end rotatably connected to the supporting plate (242), and at least one threaded single rod (2432), the upper surface of the threaded main rod (2431) and the upper surface of each of the threaded single rods (2432) being provided with a threaded hole (24321), a surface of each of the threaded single rods (2432) being away from the threaded hole (24321) being fixedly connected to a connecting rod (24322), and each connecting rod (24322) being threadedly connected to a threaded hole (24321) on an adjacent threaded single rod (2432).

4. A passive building roof structure according to claim 2, characterized in that: The support shell (241) comprises an upper support shell (2411) and a lower support shell (2412); the upper support shell (2411) is sleeved on the outer side of the lower support shell (2412) and the upper support shell (2411) and the lower support shell (2412) are slidably connected; a connecting spring (5) is fixedly connected between the upper support shell (2411) and the lower support shell (2412); the lower ends of a plurality of the brushes pass through the bottom wall of the lower support shell (2412); and a transmission component (4) is connected to the support shell (241) for driving the lower support shell (2412) to move in a direction close to or away from the upper support shell (2411).

5. A passive building roof structure according to claim 4, characterized in that: An inner side wall of the upper support shell (2411) is provided with two sliding grooves (24112), the transmission assembly (4) comprises a sliding block (41) slidably connected to each sliding groove (24112), each sliding block (41) is fixedly connected to an inner wall of the corresponding sliding groove (24112) with a spring (42), one side of each sliding block (41) is hinged with an upper connecting rod (43) and a lower connecting rod (44), the two upper connecting rods (43) are gradually inclined upward in a direction of approaching each other and are hinged to each other, and the two The lower connecting rods (44) are gradually inclined downward in a direction approaching each other and are hinged to each other, the hinge of the lower connecting rod (44) abuts against the lower inner wall of the lower support shell (2412), the lower inner wall of the lower support shell (2412) is provided with a through hole (24123), and the bottom wall of the drainage groove (11) is fixedly connected with an adjustment rod (6); when the brush assembly (24) gradually enters the drainage groove (11), one end of the adjustment rod (6) passes through the through hole (24123) and pushes the hinge of the two upper connecting rods (43) upward.

6. A passive building roof structure according to any one of claims 1 to 5, characterized in that: Both ends of the drainage groove (11) penetrate the solar air thermal collector (1), the upper surface of the solar air thermal collector (1) gradually inclines towards the drainage groove (11), and the bottom surface of the drainage groove (11) is an inclined surface.

7. A passive building roof structure according to claim 1, characterized in that: The mounting plate (3) comprises an upper mounting plate (31) and a lower mounting plate (32); an upper mounting opening (311) is provided on the lower surface of the upper mounting plate (31); a lower mounting opening (321) is provided on the upper surface of the lower mounting plate (32); the lower mounting plate (32) is inserted into the upper mounting opening (311); a driving cylinder (33) is fixedly connected to the bottom surface of the lower mounting opening (321); and a piston rod of the driving cylinder (33) is fixedly connected to the bottom wall of the upper mounting opening (311).

8. A passive building roof structure according to claim 7, characterized in that: The bottom wall of the lower mounting opening (321) is fixedly connected to a sleeve (34), the bottom wall of the lower mounting opening (321) is fixedly connected to a sleeve rod (35), and the sleeve rod (35) is slidably connected to the sleeve (34).

Images