A building roof thermal insulation integrated structure

Abstract

The present invention discloses an integrated thermal insulation structure for building roofs, specifically relating to the field of building roofs, including a roof surface mechanism, a top cover mechanism is provided on the top of the roof surface mechanism, a support mechanism connected to the roof surface mechanism is fixedly installed on the bottom of the top cover mechanism, the roof surface mechanism includes a wall base, a reinforced baffle is fixedly installed on the top of the wall base, a hollow bottom plate is fixedly installed on the inner wall of the reinforced baffle, a reinforced support plate is fixedly installed on the inner wall of the reinforced baffle, and the top cover mechanism includes an insulation board arranged on the top of the reinforced support plate, two cavities are provided inside the insulation board, and an insulation cushion material is filled inside one of the cavities. The present invention increases the thickness between the roof surface and the wall surface by lifting the insulation board and the supporting rain shelter upward, thereby slowing down the speed of temperature conduction of the top surface of the insulation board exposed to sunlight, thereby greatly reducing the temperature entering the room, thereby playing a role of heat insulation.

Description

Technical Field

[0001] The present invention relates to the technical field of building roofs, and more specifically, to an integrated thermal insulation structure of a building roof. Background Art

[0002] Roof refers to the surface of the roof of a building, and also refers to the part between the ridge and the eaves. This part occupies a large area of ​​the roof, or the roof is the larger part of the roof. It generally includes cast-in-place concrete floor, cement mortar leveling layer, thermal insulation layer, waterproof layer, cement mortar protective layer, drainage system, parapet and lightning protection measures, etc. In special projects, there is also tile construction.

[0003] The roof of an ordinary house is generally cast in concrete as the base, and insulation boards and heat preservation boards are laid on the base to achieve the corresponding functions. However, in practice, the height of the base will not change, and under continuous sunlight, the room will still be baked by high temperature, which will lead to the indoor temperature rising and stuffy conditions. Therefore, the present invention proposes an integrated thermal insulation structure for building roofs to solve the above problems. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides an integrated thermal insulation structure for a building roof, which increases the thickness between the roof surface and the wall surface by lifting the insulation board and the supporting rain shield upward, thereby slowing down the speed of temperature conduction of the top surface of the insulation board under sunlight, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: an integrated thermal insulation structure for a building roof, comprising a roof surface mechanism, a top cover mechanism is provided on the top of the roof surface mechanism, and a support mechanism connected to the roof surface mechanism is fixedly installed on the bottom of the top cover mechanism;

[0006] The roof surface mechanism comprises a wall base, a reinforced baffle is fixedly mounted on the top of the wall base, a hollow bottom plate is fixedly mounted on the inner wall of the reinforced baffle, a reinforced support plate is fixedly mounted on the inner wall of the reinforced baffle, and the top cover mechanism comprises an insulation plate arranged on the top of the reinforced support plate;

[0007] The insulation board has two cavities inside, one of which is filled with insulation padding, and the other is fixed with a sound insulation board.

[0008] The supporting mechanism includes a supporting slide fixedly mounted on the top of the hollow bottom plate, a supporting slide is inserted into the inner cavity of the supporting slide, and the supporting slide is fixedly mounted on the bottom of the insulation board. One side of the supporting mechanism is fixedly connected with a regulating mechanism for driving the supporting mechanism to rise and fall.

[0009] By adopting the above technical solution, when the supporting slide rod extends out of the top of the supporting slide frame, the insulation board can be lifted as a whole, thereby increasing the overall height of the insulation board and the supporting rain shield, which is more suitable for raising the height between the top cover mechanism and the wall in hot summer weather, extending the height of the roof surface exposed to direct sunlight, thereby reducing the indoor temperature and isolating the direct sunlight temperature on the top of the building.

[0010] In a preferred embodiment, the regulating mechanism comprises a mounting cover fixedly mounted on the top of the hollow bottom plate, two rotating shafts are rotatably mounted inside the mounting cover, the two rotating shafts penetrate the outer wall of the mounting cover, and both ends of the two rotating shafts are fixedly connected with a connecting plate, and a U-shaped bracket is fixedly mounted on one side of the connecting plate;

[0011] The inner cavity of the supporting slide is slidably mounted with a connecting slider, which is arranged at the bottom of the supporting slide bar and is slidably mounted inside a U-shaped bracket, which is inserted into the inner cavity of the supporting slide.

[0012] By adopting the above technical solution, the supporting slide bar can be more stable during the lifting process and more convenient for practical use.

[0013] In a preferred embodiment, gear plates are fixedly mounted on the outer walls of the two rotating shafts, a turbine rod is provided between the two gear plates, the turbine rod and the two gear plates are arranged in a mutually meshing state, a stepper motor is fixedly connected to the top of the turbine rod, and the stepper motor is fixedly mounted on the top of the mounting cover.

[0014] By adopting the above technical solution, when in use, by starting the stepper motor to rotate the turbine rod, the two gear plates meshing with it can be driven to rotate synchronously, thereby causing the two rotating shafts to rotate synchronously in opposite directions, and then causing the connecting plate to deflect synchronously in the opposite direction to drive the supporting slide rod to perform lifting and lowering operations.

[0015] In a preferred embodiment, a supporting rain shelter is fixedly mounted on the top of the thermal insulation board, and a buffer cavity is provided between the thermal insulation board and the supporting rain shelter.

[0016] By adopting the above technical scheme, the supporting awning is provided to provide sunshade and rain protection on the top of the insulation board. At the same time, the combination of the supporting awning and the buffer cavity is used to raise the height between the roof surface and the wall surface and increase the thickness of the roof surface, thereby greatly reducing the temperature entering the room, thereby playing the role of heat insulation again.

[0017] In a preferred embodiment, the vertical cross-section of the support type rain shelter is triangular, a plurality of guide grooves are linearly and equidistantly provided on the top of the support type rain shelter, and sloped drainage grooves are provided on both sides of the reinforced baffle, and the sloped drainage grooves are opposite to the bottom of the guide grooves.

[0018] By adopting the above technical solution, by making the vertical cross-section of the supporting rain shield into a triangle, it is possible to prevent the raised insulation board and the supporting rain shield from infiltrating rainwater into the room on rainy days, and at the same time accelerate the discharge of rainwater through the guide groove.

[0019] In a preferred embodiment, a sealing gasket is fixedly installed on one side of the reinforced supporting plate, and the sealing gasket is provided in a sheet-like shape, and water retaining plates are fixedly installed on both sides of the supporting rain shelter.

[0020] By adopting the above technical solution, water seepage at the connection between the insulation board and the reinforced supporting board can be avoided, and at the same time, water seepage at the gap between the supporting rain shelter and the reinforced baffle can be avoided.

[0021] In a preferred embodiment, a plurality of sound absorbing boxes are fixedly mounted on the bottom of the insulation board, wherein every two of the sound absorbing boxes are symmetrically arranged about the center line of the insulation board;

[0022] The interior of the multiple sound-absorbing boxes is filled with multiple sound-absorbing panels, and the multiple sound-absorbing panels are linearly and equidistantly arranged in the inner cavity of the sound-absorbing box, and there is a gap between every two sound-absorbing panels.

[0023] By adopting the above technical solution, it is possible to avoid the situation where the roof is too high, resulting in an empty room and causing an echo when speaking indoors. At the same time, when the supporting awning is hit by raindrops, the sound of the external rain will be weakened layer by layer through the buffer cavity, the sound insulation board and then the sound absorbing box, thereby playing a sound insulation role.

[0024] Technical effects and advantages of the present invention:

[0025] 1. The present invention provides a lifting support mechanism so that the insulation board and the supporting rain shelter can be lifted when the temperature is high, thereby increasing the thickness between the roof surface and the wall surface, thereby slowing down the speed of temperature conduction of the top surface of the insulation board under sunlight, thereby greatly reducing the temperature entering the room, thus playing a role of heat insulation. Conversely, when the insulation board and the supporting rain shelter are retracted, the internal thickness of the reinforced baffle can be increased, thereby slowing down the loss of temperature, thus playing a role of heat insulation.

[0026] 2. The present invention gradually moves the insulation board away from the reinforced baffle to expose a gap when the insulation board and the supporting rain shelter are lifted, thereby allowing the air at a high place to flow into the room, thereby accelerating the indoor air circulation and avoiding stuffiness;

[0027] 3. The present invention shrinks the insulation board into the inner cavity of the reinforced baffle, places the insulation board on the reinforced supporting board, and fills the gap between the hollow bottom plate and the insulation board with a sound-absorbing box to reduce the generation of indoor echo. At the same time, when the supporting awning is hit by raindrops, the sound of external rain hitting the awning will be weakened layer by layer through the buffer cavity, the sound insulation board and then the sound-absorbing box, thereby achieving a sound insulation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of the roof surface mechanism and the top cover mechanism of the present invention.

[0029] Figure 2 It is a side sectional view of the present invention.

[0030] Figure 3 For the present invention Figure 2 A-section structure enlarged view.

[0031] Figure 4 It is a front cross-sectional view of the present invention.

[0032] Figure 5 For the present invention Figure 4 Enlarged view of the structure of part B.

[0033] Figure 6 For the present invention Figure 4 Enlarged view of the C structure.

[0034] Figure 7 It is a schematic diagram of the bottom structure of the present invention.

[0035] The accompanying drawings are marked as follows: 1. Roof surface mechanism; 101. Wall base; 102. Reinforced baffle plate; 103. Hollow bottom plate; 104. Sloped drain trough; 105. Reinforced support plate; 106. Sealing pad; 2. Top cover mechanism; 21. Insulation board; 22. Support type rain shelter; 23. Water baffle plate; 24. Guide groove; 25. Buffer cavity; 26. Insulation cushion material; 27. Sound insulation board; 28. Sound absorbing box; 3. Support mechanism; 31. Support type slide; 32. Support type slide rod; 33. Connecting slide block; 4. Control mechanism; 41. Mounting cover; 42. Rotating shaft; 43. Connecting plate; 44. U-shaped bracket; 45. Gear plate; 46. Turbine rod; 47. Stepper motor. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0037] Refer to the instruction manual Figure 1-7 , an integrated thermal insulation structure of a building roof according to an embodiment of the present invention, referring to Figure 2 As shown, it includes a roof surface mechanism 1, and a top cover mechanism 2 is provided on the top of the roof surface mechanism 1. The top cover mechanism 2 plays the role of shading and rainproofing the roof surface of the building, thereby achieving the effect of rainproofing in rainy season and shading and ventilation in summer. Among them, a supporting mechanism 3 connected to the roof surface mechanism 1 is fixedly installed at the bottom of the top cover mechanism 2. The setting of the supporting mechanism 3 is used to support the top cover mechanism 2 to lift and lower, thereby improving the stability of the top cover mechanism 2 when in use;

[0038] The roof surface mechanism 1 includes a wall base 101, the wall base 101 is used to connect with the building wall, and a reinforced baffle 102 is fixedly installed on the top of the wall base 101. The wall base 101 and the reinforced baffle 102 are both formed by pouring concrete. Figure 3 As shown, a hollow bottom plate 103 is fixedly installed on the inner wall of the reinforced baffle 102. The reinforced baffle 102 is set to raise the height of the building roof surface to avoid the direct connection between the traditional roof surface and the building wall surface, which causes the indoor temperature to be extremely high when exposed to sunlight for a long time. A reinforced supporting plate 105 is fixedly installed on the inner wall of the reinforced baffle 102. The top cover mechanism 2 includes an insulation plate 21 arranged on the top of the reinforced supporting plate 105. The reinforced supporting plate 105 is set to support the insulation plate 21 so that the insulation plate 21 is covered on the top of the wall base 101 as a whole.

[0039] In order to enhance the overall heat insulation effect of the device, two cavities are provided inside the heat insulation board 21, one of the cavities is filled with a heat insulation pad 26, which plays a certain role in heat insulation, and the other cavity is fixed with a sound insulation board 27, which plays a certain role in sound insulation;

[0040] The supporting mechanism 3 includes a supporting slide 31 fixedly mounted on the top of the hollow bottom plate 103, and a supporting slide rod 32 is inserted into the inner cavity of the supporting slide 31, and the supporting slide rod 32 is fixedly mounted on the bottom of the insulation board 21, wherein the top plane of the supporting slide 31 is flush with the top plane of the reinforced supporting plate 105, and then when the supporting slide rod 32 is completely retracted into the inner cavity of the supporting slide 31, the insulation board 21 is synchronously supported by the reinforced supporting plate 105 and the supporting slide 31. When the slide rod 32 extends out of the top of the supporting slide frame 31, the insulation board 21 can be lifted as a whole, thereby increasing the overall height of the insulation board 21 and the supporting rain shield 22, which is more suitable for raising the height between the top cover mechanism 2 and the wall in hot summer weather, extending the height of the roof surface exposed to direct sunlight, thereby lowering the indoor temperature, and thus playing a role in isolating the direct sunlight temperature on the top of the building, and one side of the support mechanism 3 is fixedly connected to a regulating mechanism 4 for driving the support mechanism 3 to rise and fall.

[0041] Combination Figure 3 As shown, the regulating mechanism 4 includes a mounting cover 41 fixedly mounted on the top of the hollow bottom plate 103, two rotating shafts 42 are rotatably mounted inside the mounting cover 41, the two rotating shafts 42 penetrate the outer wall of the mounting cover 41, and both ends of the two rotating shafts 42 are fixedly connected with a connecting plate 43, and a U-shaped bracket 44 is fixedly mounted on one side of the connecting plate 43;

[0042] The inner cavity of the supporting slide 31 is slidably installed with a connecting slider 33, which is arranged at the bottom of the supporting slide bar 32, and the connecting slider 33 is slidably installed inside the U-shaped bracket 44, and the U-shaped bracket 44 is inserted into the inner cavity of the supporting slide 31, and then when the rotating shaft 42 rotates, it will synchronously drive the connecting plate 43 and the U-shaped bracket 44 to deflect, and then when the U-shaped bracket 44 deflects upward, it will push the connecting slider 33 to drive the supporting slide bar 32 to lift up as a whole. Conversely, when the connecting plate 43 drives the U-shaped bracket 44 to deflect downward as a whole, it will push the connecting slider 33 to drive the supporting slide bar 32 to move downward as a whole in the inner cavity of the supporting slide 31.

[0043] Combination Figure 6 As shown, gear plates 45 are fixedly mounted on the outer walls of the two rotating shafts 42, and a turbine rod 46 is provided between the two gear plates 45. The turbine rod 46 and the two gear plates 45 are arranged in a mutually meshing state. A stepper motor 47 is fixedly connected to the top of the turbine rod 46. The stepper motor 47 is fixedly mounted on the top of the mounting cover 41. When in use, by starting the stepper motor 47 to rotate the turbine rod 46, the two gear plates 45 meshing therewith can be driven to rotate synchronously, thereby causing the two rotating shafts 42 to rotate synchronously in the opposite direction, thereby causing the connecting plate 43 to deflect synchronously in the opposite direction to drive the supporting slide bar 32 to perform lifting and lowering operations.

[0044] Further, see Figure 3 and Figure 5 As shown, a supporting rain shield 22 is fixedly installed on the top of the insulation board 21. The supporting rain shield 22 is used to provide sunshade and rain protection on the top of the insulation board 21. At the same time, a buffer cavity 25 is provided between the insulation board 21 and the supporting rain shield 22. The combination of the supporting rain shield 22 and the buffer cavity 25 is used to raise the height between the roof surface and the wall surface, increase the thickness of the roof surface, and slow down the speed of temperature conduction of the top surface of the supporting rain shield 22 under sunlight, thereby greatly reducing the temperature entering the room, and then playing the role of heat insulation again.

[0045] In specific implementation, in clear weather, by starting the stepper motor 47, the turbine rod 46 rotates forward, so that the two gear plates 45 drive the rotating shaft 42 to deflect synchronously, thereby making the connecting plate 43 and the U-shaped bracket 44 push the supporting slide bar 32 to extend upward from the top of the supporting slide frame 31, thereby lifting the insulation board 21 as a whole, so that the insulation board 21 extends out of the inner cavity of the reinforced baffle 102, on the one hand, the overall height of the top cover mechanism 2 is lifted, so that the thickness between the roof surface and the wall surface is increased, thereby slowing down the speed of temperature conduction of the top surface of the insulation board 21 exposed to sunlight, thereby greatly reducing the temperature entering the room, playing a role in heat insulation, on the other hand, a gap is created between the insulation board 21 and the reinforced baffle 102, thereby allowing air from a high place to circulate into the room, thereby accelerating the indoor air circulation and avoiding stuffiness. Conversely, when the stepper motor 47 is controlled to rotate in the opposite direction, the connecting plate 43 and the U-shaped bracket 44 can be driven to deflect in the opposite direction to drive the supporting slide bar 32 to return to its original position.

[0046] At the same time, in order to prevent the raised insulation board 21 and the supporting rain shelter 22 from infiltrating rainwater into the room on rainy days, Figure 2 As shown, the vertical cross-section of the supporting rain shelter 22 is triangular, which is used to guide rainwater to flow out to both sides. At the same time, a plurality of guide grooves 24 are linearly and equidistantly opened on the top of the supporting rain shelter 22 to accelerate the discharge of rainwater. Figure 5 As shown, both sides of the reinforced baffle 102 are provided with a sloped drainage groove 104, and the sloped drainage groove 104 is directly opposite to the bottom of the guide groove 24. Then, on rainy days, by retracting the supporting slide bar 32 into the inner cavity of the supporting slide frame 31, when the insulation board 21 is placed on the reinforced supporting board 105, the bottom of the guide groove 24 will be flush with the opening of the sloped drainage groove 104 on the inner wall of the reinforced baffle 102, so that the rainwater on the supporting rain shelter 22 will flow to the outside of the building through the sloped drainage groove 104. At the same time, in order to avoid water seepage at the connection between the insulation board 21 and the reinforced supporting board 105, refer to Figure 5As shown, a sealing gasket 106 is fixedly installed on one side of the reinforced support plate 105. The sealing gasket 106 is arranged in a sheet shape, so that it can fit tightly on one side of the reinforced support plate 105, thereby filling the connection between the reinforced support plate 105 and the insulation plate 21. At the same time, in order to avoid water seepage in the gap between the supporting awning 22 and the reinforced baffle 102, water retaining plates 23 are fixedly installed on both sides of the supporting awning 22 to cover the reinforced baffle 102 and both sides of the supporting awning 22.

[0047] Reference Figure 3-5 As shown, in order to avoid the situation where the roof surface is too high and the room is empty, so that echoes are generated when people speak indoors, a plurality of sound-absorbing boxes 28 are fixedly installed at the bottom of the insulation board 21, wherein every two sound-absorbing boxes 28 are symmetrically arranged about the center line of the insulation board 21, and the arrangement of the plurality of sound-absorbing boxes 28 is used to fill the empty area between the insulation board 21 and the hollow bottom plate 103, thereby reducing the generation of indoor echoes. At the same time, the interiors of the plurality of sound-absorbing boxes 28 are filled with a plurality of sound-absorbing panels, and the plurality of sound-absorbing panels are linearly arranged in the inner cavity of the sound-absorbing box 28 in an equidistant state, and there is a gap between every two sound-absorbing panels. When the supporting rain shelter 22 is hit by raindrops, the sound of the external rain will be weakened layer by layer through the buffer cavity 25, the sound insulation board 27 and then the sound-absorbing box 28, thereby avoiding the situation where the rain hits the roof surface and the sound is too loud on rainy days.

[0048] During specific implementation, on rainy days, the stepper motor 47 is controlled to drive the turbine rod 46 to reverse, so that the supporting slide rod 32 is retracted into the inner cavity of the supporting slide 31, and then the insulation board 21 is placed on the top of the reinforced supporting plate 105, so that the insulation board 21 as a whole is retracted into the inner cavity of the reinforced baffle 102, and the supporting awning 22 covers the top of the wall base 101 to guide rainwater to flow to both sides, which is beneficial to waterproofing and also avoids rainwater accumulation on the supporting awning 22.

[0049] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0050] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0051] Finally: 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 principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A building roof thermal insulation integrated structure, comprising a roof surface mechanism (1), a top cover mechanism (2) being provided on the top of the roof surface mechanism (1), and a support mechanism (3) connected to the roof surface mechanism (1) being fixedly mounted on the bottom of the top cover mechanism (2); Features: The roof surface mechanism (1) comprises a wall base (101), a reinforced baffle (102) is fixedly mounted on the top of the wall base (101), a hollow bottom plate (103) is fixedly mounted on the inner wall of the reinforced baffle (102), a reinforced support plate (105) is fixedly mounted on the inner wall of the reinforced baffle (102), and the top cover mechanism (2) comprises a heat preservation plate (21) arranged on the top of the reinforced support plate (105); The insulation board (21) has two cavities formed inside, one of the cavities is filled with an insulation pad (26), and the other of the cavities has a sound insulation board (27) fixedly installed inside. The support mechanism (3) comprises a supporting slide (31) fixedly mounted on the top of the hollow bottom plate (103); a supporting slide rod (32) is inserted into the inner cavity of the supporting slide (31); the supporting slide rod (32) is fixedly mounted on the bottom of the insulation plate (21); and a regulating mechanism (4) is fixedly connected to one side of the support mechanism (3); The regulating mechanism (4) comprises a mounting cover (41) fixedly mounted on the top of the hollow bottom plate (103), two rotating shafts (42) being rotatably mounted inside the mounting cover (41), the two rotating shafts (42) penetrating through the outer wall of the mounting cover (41), and both ends of the two rotating shafts (42) being fixedly connected to a connecting plate (43), and a U-shaped bracket (44) being fixedly mounted on one side of the connecting plate (43); A connecting slider (33) is slidably mounted in the inner cavity of the supporting slide (31); the connecting slider (33) is arranged at the bottom of the supporting slide rod (32); and the connecting slider (33) is slidably mounted inside a U-shaped bracket (44); and the U-shaped bracket (44) is plugged into the inner cavity of the supporting slide (31).

2. The thermal insulation integrated structure of a building roof according to claim 1, characterized in that: Gear plates (45) are fixedly mounted on the outer walls of the two rotating shafts (42); a turbine rod (46) is provided between the two gear plates (45); the turbine rod (46) and the two gear plates (45) are arranged in a mutually meshing state; a stepper motor (47) is fixedly connected to the top of the turbine rod (46); and the stepper motor (47) is fixedly mounted on the top of the mounting cover (41).

3. The thermal insulation integrated structure of a building roof according to claim 1, characterized in that: A supporting rain shelter (22) is fixedly mounted on the top of the thermal insulation board (21), and a buffer cavity (25) is provided between the thermal insulation board (21) and the supporting rain shelter (22).

4. The thermal insulation integrated structure of a building roof according to claim 3, characterized in that: The vertical cross-section of the support-type rain shelter (22) is triangular, a plurality of guide grooves (24) are linearly and equidistantly provided on the top of the support-type rain shelter (22), and sloped drainage grooves (104) are provided on both sides of the reinforced baffle (102), the sloped drainage grooves (104) being directly opposite to the bottom of the guide grooves (24).

5. The thermal insulation integrated structure of a building roof according to claim 4, characterized in that: A sealing pad (106) is fixedly mounted on one side of the reinforced support plate (105), and the sealing pad (106) is arranged in the shape of a sheet. Water retaining plates (23) are fixedly mounted on both sides of the supporting rain shelter (22).

6. The building roof thermal insulation integrated structure according to claim 5, characterized in that: A plurality of sound absorbing boxes (28) are fixedly mounted on the bottom of the heat insulation board (21), wherein every two of the sound absorbing boxes (28) are symmetrically arranged about the center line of the heat insulation board (21); The interior of the plurality of sound absorbing boxes (28) is filled with a plurality of sound absorbing panels, and the plurality of sound absorbing panels are linearly arranged in sequence and equidistantly in the inner cavity of the sound absorbing box (28), and there is a gap between every two of the sound absorbing panels.

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