Energy-saving exhaust device for roof ventilation, heat insulation and freeze-thaw resistance

Abstract

The application discloses a roof ventilation heat insulation anti-freeze energy-saving exhaust device, and relates to the technical field of building exhaust devices. The roof ventilation heat insulation anti-freeze energy-saving exhaust device comprises a base, a main pipe fixedly installed on the base, a sealing plate fixedly installed at the bottom of the main pipe, a plurality of exhaust holes formed in the sealing plate, a rotating shaft one rotatably installed in each exhaust hole, a main opening and closing plate fixedly installed on each rotating shaft one, an inner pipe fixedly installed on the sealing plate and coaxial with the sealing plate, a rotating shaft two rotatably installed in the inner pipe, and a micro-motion opening and closing plate fixedly installed on the rotating shaft two. The roof ventilation heat insulation anti-freeze energy-saving exhaust device can automatically adjust the exhaust opening degree according to the exhaust pressure difference and the condensate accumulation state, timely scrape, collect and discharge the condensate, and simultaneously realize the functions of ventilation, heat preservation and water accumulation prevention, so that the energy-saving property and low-temperature operation reliability of the roof exhaust device are improved.

Description

Technical Field

[0001] This invention relates to the field of building exhaust systems, and more particularly to a roof ventilation, heat insulation, freeze-thaw resistant, and energy-saving exhaust system. Background Technology

[0002] Roof exhaust systems are ventilation facilities installed on the roof of a building and connected to the indoor exhaust channels. They are used to exhaust stale and humid air from the indoor space, roof mezzanine, or equipment space to the outside. Such devices need to provide sufficient ventilation area when the exhaust demand is high, and reduce the backflow of outdoor air and the loss of indoor heat when the exhaust demand is low.

[0003] Existing roof exhaust systems typically use a single exhaust channel and a fixed opening and closing structure, making it difficult to adjust the ventilation area in stages according to the pressure difference inside and outside the exhaust channel. When the ventilation area is too large, it is easy to cause heat loss, and when the ventilation area is too small, it is difficult to meet the exhaust demand under high humidity conditions.

[0004] Furthermore, the condensate generated by existing devices is generally discharged through simple drain holes or drain pipes. When the rate of condensate generation exceeds the rate of drainage, water tends to accumulate inside the pipes, which can easily lead to water droplet residue and the risk of freezing.

[0005] Therefore, it is necessary to design a roof ventilation, heat insulation, freeze-thaw resistant, energy-saving exhaust device. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a roof ventilation, heat insulation, freeze-thaw resistant, energy-saving exhaust device, which solves the problems mentioned in the background section.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A roof ventilation, heat insulation, freeze-thaw resistant, energy-saving exhaust device includes a base, a main pipe fixedly installed on the base, a sealing plate fixedly installed at the bottom of the main pipe, and multiple exhaust holes opened on the sealing plate. A rotating shaft is rotatably installed in each exhaust hole, and a main opening and closing plate is fixedly installed on each rotating shaft. An inner tube is fixedly installed on the sealing plate, and the inner tube is coaxial with the sealing plate. A rotating shaft is rotatably installed in the inner tube, and a micro-movement opening and closing plate is fixedly installed on the rotating shaft.

[0009] Multiple water collecting rings are fixedly installed on the inner wall of the main pipe from top to bottom. The main pipe is provided with a water storage tank and multiple annular water collecting tanks. Each annular water collecting tank corresponds to the position of the corresponding water collecting ring. Multiple sets of through holes are provided on the inner wall of the main pipe. Each through hole communicates with the corresponding annular water collecting tank. A connection hole is provided between the water storage tank and the multiple annular water collecting tanks.

[0010] The main pipe is equipped with an opening adjustment component that cooperates with multiple rotating shafts, and the opening adjustment component gradually releases the restriction on the opening of the vent hole according to the rise of the water level in the water tank.

[0011] Furthermore, a discharge pipe is fixedly installed at the top of the main pipe, and a filter screen is fixedly installed at the end of the discharge pipe away from the main pipe. An elbow is fixedly installed at the top of the inner pipe, and the elbow is located inside the discharge pipe.

[0012] Furthermore, the opening adjustment assembly consists of a floating mechanism, multiple turntables, multiple protrusions, multiple arc grooves, and multiple stops. The multiple turntables are respectively fixedly installed on one end of the corresponding rotating shaft located inside the main pipe. The multiple protrusions are respectively fixedly installed on the side wall of the corresponding turntable. The multiple arc grooves are all opened inside the main pipe, and each arc groove cooperates with the corresponding protrusion. The multiple stops are all installed inside the main pipe through the floating mechanism, and each stop cooperates with the corresponding protrusion.

[0013] Furthermore, the central angle of the arc groove is 90°, the end of the stop block near the protrusion is provided with a guide slope, and the angle between the guide slope and the movement direction of the protrusion in the arc groove is 45°, and the angle between the micro-motion opening and closing plate and the main opening and closing plate and the sealing plate at the initial limit position is 10°.

[0014] Furthermore, the floating mechanism consists of a floating plate, a moving ring, and multiple tie rods. The floating plate is slidably installed in the water storage tank. An annular lifting groove is provided in the main pipe. The moving ring is slidably installed in the annular lifting groove, and the bottom of the moving ring is fixedly connected to multiple stops. Multiple tie rods are fixedly installed between the moving ring and the floating plate, and multiple round holes are provided between the water storage tank and the annular lifting groove to be slidably and sealingly connected to the corresponding tie rods.

[0015] Furthermore, a rotating ring is rotatably mounted on the side wall of the inner tube, and a support rod is fixedly mounted on the rotating ring. Multiple fixed rings are fixedly mounted on the support rod, and each fixed ring corresponds to the position of a corresponding water collection ring. A water removal mechanism is fixedly mounted on the side wall of each fixed ring.

[0016] Furthermore, the water removal mechanism consists of an inner scraper, a water guide strip, and an outer scraper. The inner scraper is fixedly installed on the side wall of the fixing ring and is in contact with the side wall of the inner pipe. The water guide strip is fixedly installed at the bottom of the inner scraper. The outer scraper is fixedly installed at the end of the water guide strip away from the inner scraper and is in contact with the inner wall of the main pipe. The water guide strip is inclined downward from the end closer to the inner scraper to the end closer to the outer scraper.

[0017] Furthermore, a motor is fixedly installed on the sealing plate, and a drive gear is fixedly connected to the output end of the motor. An internal gear ring is fixedly installed on the inner wall of the rotating ring, and the internal gear ring meshes with the drive gear. A touch switch is fixedly installed on the side wall of one of the arc-shaped grooves away from the protrusion, and the touch switch is electrically connected to the motor.

[0018] Furthermore, a drain outlet is provided at the bottom of the water storage tank, and a one-way drain valve is installed in the drain outlet. The inlet side of the one-way drain valve is connected to the water storage tank, and the outlet side of the one-way drain valve is connected to the outside of the main pipe. The effective flow area of ​​the drain outlet is less than the total flow area of ​​the multiple connection holes 15.

[0019] Compared with existing technologies, the advantages of this invention are:

[0020] 1. Through the cooperation of the inner tube, micro-motion opening and closing plate, multiple exhaust holes and main opening and closing plate, the micro-motion opening and closing plate and the main opening and closing plate have different opening pressure differences. When the pressure difference is small, the micro-motion opening and closing plate opens and forms a small flow of exhaust. After the pressure difference decreases, it returns to its original position by its own gravity to reduce the continuous loss of indoor heat. When the pressure difference increases, multiple main opening and closing plates open and form a large flow of exhaust, so that the exhaust capacity is adapted to the actual ventilation needs.

[0021] 2: Through the cooperation of the floating plate, pull rod, moving ring, stop block, turntable and protrusion, the water level change caused by the accumulation of condensate is converted into the opening adjustment action of the main opening and closing plate. When the amount of condensate is small, the stop block restricts the main opening and closing plate to the first opening position. When the condensate accumulates rapidly, the floating plate rises with the water level and drives the stop block to release the restriction, so that the main opening and closing plate can rotate further to the second opening position, thereby increasing the speed of exhaust of hot and humid air.

[0022] 3: Through the coordination of touch switch, motor, rotating ring, inner scraper, water guide strip and outer scraper, the water removal mechanism is automatically activated after the main opening and closing plate reaches the second opening position. The inner scraper and outer scraper scrape off the condensate on the outer wall of the inner pipe and the inner wall of the main pipe respectively, and guide the condensate to the water collection ring, thereby reducing the risk of condensate dripping and water freezing and thawing.

[0023] In summary, this invention can open the micro-motion control plate and the main control plate according to the pressure difference inside and outside the exhaust channel, realizing limited exhaust under small pressure difference and enhanced exhaust under large pressure difference. It also automatically releases the opening limit of the main control plate by utilizing the water level change formed by the accumulation of condensate. At the same time, when the main control plate reaches the maximum opening, it triggers the water removal mechanism to realize the scraping, collection and discharge of condensate, effectively reducing indoor heat loss and water accumulation inside the pipes, and greatly improving the adaptability of roof exhaust, condensate treatment efficiency and low-temperature operation reliability. Attached Figure Description

[0024] Figure 1This is a schematic diagram of the structure of a roof ventilation, heat insulation, freeze-thaw resistant, energy-saving exhaust device proposed in this invention;

[0025] Figure 2 for Figure 1 A bottom view;

[0026] Figure 3 for Figure 2 Schematic diagram of the structure of surface AA;

[0027] Figure 4 for Figure 3 Enlarged structural diagram of part a;

[0028] Figure 5 for Figure 1 A schematic diagram of the structure after removing the base and main pipe;

[0029] Figure 6 for Figure 5 A structural diagram from another perspective;

[0030] Figure 7 for Figure 6 Enlarged structural diagram of part b in the middle;

[0031] Figure 8 for Figure 5 Enlarged schematic diagram of the structure at the scraper joint between the Chinese and foreign sides;

[0032] Figure 9 for Figure 8 A structural diagram from another perspective;

[0033] Figure 10 for Figure 9 A magnified schematic diagram of the structure of part c.

[0034] In the diagram: 1. Base, 2. Main pipe, 3. Drain pipe, 4. Filter screen, 5. Sealing plate, 6. Vent hole, 7. Inner pipe, 8. Elbow, 9. Micro-motion opening and closing plate, 10. Main opening and closing plate, 11. Water collection ring, 12. Annular water collection trough, 13. Through hole, 14. Water storage tank, 15. Connection hole, 16. Turntable, 17. Protrusion, 18. Floating plate, 19. Pull rod, 20. Moving ring, 21. Stop block, 22. Rotating ring, 23. Support rod, 24. Fixed ring, 25. Inner scraper, 26. Water guide strip, 27. Outer scraper, 28. Motor, 29. Drive gear, 30. Inner gear ring, 31. Touch switch. Detailed Implementation

[0035] Reference Figures 1-3The present invention provides a roof ventilation, heat insulation, freeze-thaw resistance and energy-saving exhaust device, including a base 1, which is used to fix the exhaust port reserved on the roof of the building. A waterproof sealing layer is provided between the base 1 and the roof. A main pipe 2 is fixedly installed on the base 1. The main pipe 2 is arranged in a vertical direction and communicates with the indoor exhaust channel below the roof, so that the turbid air and humid air generated indoors can enter the main pipe 2.

[0036] A discharge pipe 3 is fixedly installed at the top of the main pipe 2. The discharge pipe 3 is curved so that the outlet of the discharge pipe 3 faces to the side, thereby reducing the direct entry of rainwater, snow and debris into the main pipe 2. A filter screen 4 is fixedly installed at the end of the discharge pipe 3 away from the main pipe 2. The filter screen 4 is used to block fallen leaves, insects and other debris from entering the discharge pipe 3, while allowing the gas in the main pipe 2 to be discharged to the outside.

[0037] A sealing plate 5 is fixedly installed at the bottom of the main pipe 2. The sealing plate 5 is used to divide the main exhaust channel at the bottom of the main pipe 2 into multiple exhaust channels that can be opened and closed independently. Multiple exhaust holes 6 are provided on the sealing plate 5 at intervals along the circumference. A rotating shaft is rotatably installed in each exhaust hole 6. A main opening and closing plate 10 is fixedly installed on each rotating shaft. The main opening and closing plate 10 can rotate relative to the exhaust hole 6 around the corresponding rotating shaft.

[0038] The vent 6 has an inclined limiting surface at its edge that matches the initial angle of the main opening and closing plate 10. The outer circumferential dimension of the main opening and closing plate 10 is larger than the effective ventilation dimension of the vent 6. When the main opening and closing plate 10 is in the initial limiting position, it abuts against the corresponding inclined limiting surface and forms a 10° angle with the sealing plate 5, so that the main opening and closing plate 10 can cover and close the corresponding vent 6. The main opening and closing plate 10 is set with an initial inclination angle of 10°, which allows the main opening and closing plate 10 to avoid the rotation dead point parallel to the sealing plate 5. When the gas pressure below the sealing plate 5 increases, the airflow can form an opening torque on the main opening and closing plate 10 that rotates in the direction of exhaust. At the same time, the inclined limiting surface can restrict the main opening and closing plate 10 from rotating in the opposite direction to the indoor direction, thereby determining the opening direction of the main opening and closing plate 10.

[0039] An inner pipe 7 is fixedly installed on the sealing plate 5. The central axis of the inner pipe 7 coincides with the central axis of the main pipe 2. The lower end of the inner pipe 7 is connected to the indoor exhaust channel below the sealing plate 5. An elbow 8 is fixedly installed on the top of the inner pipe 7. The outlet end of the elbow 8 extends into the exhaust pipe 3, so that the gas discharged through the inner pipe 7 can enter the exhaust pipe 3 and be discharged to the outside through the filter screen 4.

[0040] A rotating shaft 2 is rotatably installed inside the inner tube 7, and a micro-motion opening and closing plate 9 is fixedly installed on the rotating shaft 2. An inclined limiting surface matching the initial angle of the micro-motion opening and closing plate 9 is formed on the inner wall of the inner tube 7. The outer circumferential dimensions of the micro-motion opening and closing plate 9 match the internal channel of the inner tube 7. When the micro-motion opening and closing plate 9 is in the initial limiting position, it abuts against the inclined limiting surface inside the inner tube 7 and forms a 10° angle with the sealing plate 5, thereby sealing the internal channel of the inner tube 7.

[0041] The micro-motion opening and closing plate 9 is set with an initial tilt angle of 10°, which enables the airflow pressure to form an opening torque with a definite direction on the micro-motion opening and closing plate 9, avoiding the micro-motion opening and closing plate 9 from swinging in an uncertain direction under the action of pressure difference, and reducing the resistance that the micro-motion opening and closing plate 9 needs to overcome in the initial opening stage.

[0042] The rotating shafts 1 and 2 are respectively offset from the center of gravity of the corresponding opening and closing plates, so that the micro-movement opening and closing plate 9 and the main opening and closing plate 10 can return to the initial limit position by their own gravity when there is no airflow pressure difference. The center of gravity of the two types of opening and closing plates is located on the side that can generate the reset torque within the allowable rotation range, preventing the opening and closing plates from exceeding the gravity reset dead point after reaching the maximum opening.

[0043] The mass, effective pressure-bearing area, eccentric position of the second rotating shaft, and center of gravity of the micro-motion opening and closing plate 9 are set to give the micro-motion opening and closing plate 9 a first opening pressure difference. The mass, effective pressure-bearing area, eccentric position of the first rotating shaft, and center of gravity of the main opening and closing plate 10 are set to give the main opening and closing plate 10 a second opening pressure difference. The first opening pressure difference is less than the second opening pressure difference, thereby causing the micro-motion opening and closing plate 9 to open before the main opening and closing plate 10 under a smaller pressure difference.

[0044] When the gas pressure below the sealing plate 5 reaches only the first opening pressure difference, the airflow acts on the initially tilted micro-motion opening and closing plate 9 and generates an opening torque in the exhaust direction. When the opening torque is greater than the closing torque formed by the weight of the micro-motion opening and closing plate 9 and the friction of the rotating shaft, the micro-motion opening and closing plate 9 leaves the tilted limiting surface in the inner tube 7 and rotates in the exhaust direction.

[0045] After the micro-motion opening and closing plate 9 is opened, the indoor turbid air passes through the inner pipe 7, the elbow 8 and the exhaust pipe 3 in sequence and is discharged to the outside. Since the airflow pressure difference at this time is lower than the second opening pressure difference, the multiple main opening and closing plates 10 still abut against the inclined limiting surface of the corresponding exhaust port 6, so that the large flow exhaust channel of the main pipe 2 remains closed.

[0046] When some of the turbid gas is discharged and the pressure difference between the inside and outside of the exhaust channel is reduced, the opening torque acting on the micro-motion opening and closing plate 9 decreases. Under its own gravity, the micro-motion opening and closing plate 9 returns to the initial limit position and abuts against the inclined limit surface inside the inner tube 7, so that the inner tube 7 returns to the closed state, thereby reducing the continuous loss of indoor heat after a small amount of air exchange is completed.

[0047] When the positive pressure inside the room increases or the demand for exhaust increases, causing the gas pressure below the sealing plate 5 to reach the second opening pressure difference, the airflow opening torque acting on the main opening and closing plate 10 is greater than the closing torque formed by the weight of the main opening and closing plate 10 itself and the friction of the rotating shaft. Multiple main opening and closing plates 10 leave their corresponding inclined limiting surfaces and rotate in the exhaust direction.

[0048] After the multiple main opening and closing plates 10 are opened, the multiple exhaust holes 6 on the sealing plate 5 form an exhaust area larger than the internal channel of the inner pipe 7, allowing indoor gas to enter the main pipe 2 through the multiple exhaust holes 6 and flow upward along the annular space between the main pipe 2 and the inner pipe 7, then enter the discharge pipe 3 and be discharged through the filter screen 4, thereby improving the exhaust capacity of the device.

[0049] Reference Figure 3 and Figure 4 Multiple water collecting rings 11 are fixedly installed on the inner wall of the main pipe 2 from top to bottom. Each water collecting ring 11 is arranged around the inner pipe 7. The inner periphery of the water collecting ring 11 is higher than the outer periphery, so that the water collecting ring 11 forms a water guiding surface that slopes downward from the inside to the outside. The condensate falling on the water collecting ring 11 can flow towards the inner wall of the main pipe 2 under the action of gravity.

[0050] Multiple annular water collection tanks 12 are provided inside the main pipe 2. Each annular water collection tank 12 corresponds to the position of the corresponding water collection ring 11. Multiple sets of through holes 13 are provided on the inner wall of the main pipe 2. Each set of through holes 13 connects the inside of the main pipe 2 and the corresponding annular water collection tank 12, so that the condensate guided by the water collection ring 11 to the inner wall of the main pipe 2 can enter the corresponding annular water collection tank 12 through the through holes 13.

[0051] The main pipe 2 is also equipped with a water storage tank 14, which is located below multiple annular water collection tanks 12. The multiple annular water collection tanks 12 and the water storage tank 14 are connected by connecting holes 15, so that the condensate entering the annular water collection tank 12 can flow into the water storage tank 14 through the connecting holes 15 under the action of gravity.

[0052] The bottom of the water storage tank 14 is provided with a drain outlet, and a one-way drain valve is installed in the drain outlet. The water inlet side of the one-way drain valve is connected to the water storage tank 14, and the water outlet side of the one-way drain valve is connected to the outside of the main pipe 2, so that the condensate in the water storage tank 14 can be discharged to the drainage area of ​​the building roof, while preventing outdoor air, rainwater and debris from entering the water storage tank 14 through the drain outlet.

[0053] The effective flow area of ​​the drain outlet is smaller than the total flow area of ​​the multiple connection holes 15. When the amount of condensate generated in the device is small, the condensate can be discharged in time through the one-way drain valve after entering the water storage tank 14, so that the water level in the water storage tank 14 is kept at a low position.

[0054] When the humidity of the discharged gas increases and the rate at which condensate enters the water storage tank 14 exceeds the drainage rate of the one-way drain valve, the condensate in the water storage tank 14 gradually accumulates and the water level rises.

[0055] Reference Figures 5-7 The main pipe 2 is equipped with an opening adjustment assembly that cooperates with multiple rotating shafts. The opening adjustment assembly includes a floating mechanism, multiple turntables 16, multiple protrusions 17, multiple arc grooves and multiple stops 21. The multiple turntables 16 are respectively fixedly installed on one end of the corresponding rotating shaft located inside the main pipe 2, so that each turntable 16 can rotate synchronously with the corresponding main opening and closing plate 10.

[0056] Multiple protrusions 17 are fixedly installed on the side wall of the corresponding turntable 16. Multiple arc-shaped grooves are opened in the main tube 2. Each arc-shaped groove cooperates with the corresponding protrusion 17. The arc-shaped groove extends with the corresponding rotating shaft as the center. The central angle of the arc-shaped groove is 90°, so that the protrusion 17 can move in an arc with the turntable 16 in the arc-shaped groove.

[0057] The floating mechanism includes a floating plate 18, multiple tie rods 19 and a moving ring 20. The floating plate 18 is slidably installed in the water storage tank 14. The average density of the floating plate 18 is less than that of water, so that the floating plate 18 can move up and down with the change of water level in the water storage tank 14.

[0058] The main pipe 2 has an annular lifting groove, the moving ring 20 is slidably installed in the annular lifting groove, multiple stops 21 are fixedly installed at the bottom of the moving ring 20 and extend into the movement path of the corresponding protrusion 17, and multiple pull rods 19 are fixedly installed between the floating plate 18 and the moving ring 20.

[0059] Multiple circular holes are provided between the water storage tank 14 and the annular lifting groove. Each tie rod 19 is slidably connected to the corresponding circular hole, so that the floating plate 18, multiple tie rods 19, moving ring 20 and multiple stop blocks 21 can move up and down synchronously, while reducing the amount of condensate in the water storage tank 14 entering the annular lifting groove through the circular holes.

[0060] When the water level in the water storage tank 14 is low, the floating plate 18 is located at the lower part of the water storage tank 14, and the moving ring 20 and multiple baffles 21 are at the first height position. When the main opening and closing plate 10 is opened under the action of pressure difference, the main opening and closing plate 10 drives the turntable 16 and the protrusion 17 to rotate through the rotating shaft, and the protrusion 17 moves along the corresponding arc groove.

[0061] When the main opening and closing plate 10 reaches the first opening position, the protrusion 17 abuts against the corresponding stop 21, and the stop 21 restricts the protrusion 17 from continuing to move, so that the main opening and closing plate 10 is kept in the first opening position, and the multiple exhaust holes 6 form the first opening degree, thereby meeting the exhaust demand under normal exhaust conditions.

[0062] When the humidity of the exhaust gas continues to increase, the amount of condensate generated on the inner wall of the main pipe 2, the outer wall of the inner pipe 7, the inner wall of the discharge pipe 3, and the surface of the water collection ring 11 increases. The condensate flows along the inner wall of the main pipe 2 and the water collection ring 11, and enters the water storage tank 14 in sequence through the through hole 13, the annular water collection tank 12, and the connecting hole 15.

[0063] When the speed at which condensate enters the water storage tank 14 is greater than the speed at which the one-way drain valve drains, the water level in the water storage tank 14 rises and pushes the floating plate 18 to move upward. The floating plate 18 drives the moving ring 20 to move upward through multiple pull rods 19, and the moving ring 20 drives multiple stops 21 to move upward synchronously.

[0064] After the baffle 21 moves upward, it gradually leaves the movement path of the corresponding protrusion 17 and releases the rotation restriction on the protrusion 17. Under the action of airflow pressure difference, the multiple main opening and closing plates 10 continue to rotate from the first opening position to the exhaust direction to the second opening position, so that the exhaust port 6 increases from the first opening degree to the second opening degree, thereby increasing the exhaust speed of hot and humid air.

[0065] The end of the stop block 21 near the protrusion 17 is provided with a guide slope. The angle between the guide slope and the movement direction of the protrusion 17 in the arc groove is 45°. When the condensate in the water storage tank 14 is gradually discharged and the floating plate 18, the moving ring 20 and the stop block 21 are lowered, the guide slope can slide to contact the protrusion 17, preventing the stop block 21 from directly jamming the protrusion 17 and hindering the main opening and closing plate 10 from resetting.

[0066] One of the arc-shaped grooves is fixedly installed with a touch switch 31 at the end away from the initial position of the protrusion 17. When the corresponding main opening and closing plate 10 continues to rotate from the first opening position to the second opening position, the main opening and closing plate 10 drives the turntable 16 and the protrusion 17 to continue to rotate through the rotating shaft. After the protrusion 17 moves to the end of the arc-shaped groove, it presses the touch switch 31.

[0067] Reference Figures 8-10 A rotating ring 22 is rotatably installed on the outer wall of the inner tube 7. The rotating ring 22 is coaxially arranged with the inner tube 7. A support rod 23 extending axially along the inner tube 7 is fixedly installed on the rotating ring 22. Multiple fixing rings 24 are fixedly installed on the support rod 23. Each fixing ring 24 corresponds to the position of the corresponding water collection ring 11.

[0068] A water removal mechanism is fixedly installed on the side wall of each fixed ring 24. The water removal mechanism includes an inner scraper 25, a water guide strip 26, and an outer scraper 27. The inner scraper 25 is fixedly installed on the side wall of the fixed ring 24 and fits against the outer side wall of the inner pipe 7. The water guide strip 26 is fixedly installed at the bottom of the inner scraper 25. The outer scraper 27 is fixedly installed at the end of the water guide strip 26 away from the inner scraper 25 and fits against the inner wall of the main pipe 2.

[0069] The water guide strip 26 is inclined downward from the end near the inner scraper strip 25 to the end near the outer scraper strip 27, so that the condensate scraped off by the inner scraper strip 25 from the outer wall of the inner pipe 7 can flow outward along the water guide strip 26 and fall into the corresponding water collection ring 11, and the condensate scraped off by the outer scraper strip 27 from the inner wall of the main pipe 2 can enter the corresponding water collection ring 11 along the inner wall of the main pipe 2 or the lower end of the outer scraper strip 27.

[0070] A motor 28 is fixedly installed on the sealing plate 5. The motor 28 is provided with a waterproof protective shell. A drive gear 29 is fixedly connected to the output end of the motor 28. An internal gear ring 30 is fixedly installed on the inner wall of the rotating ring 22. The drive gear 29 meshes with the internal gear ring 30. The touch switch 31 is a normally open touch switch and is electrically connected to the motor 28.

[0071] When the protrusion 17 moves to the end of the arc groove and presses the touch switch 31, the touch switch 31 connects the power supply circuit of the motor 28, the motor 28 starts and drives the drive gear 29 to rotate, and the drive gear 29 drives the rotating ring 22 to rotate through the internal gear ring 30.

[0072] The rotating ring 22 drives multiple fixed rings 24 to rotate synchronously around the inner tube 7 via the support rod 23, causing multiple inner scraper strips 25 to scrape circumferentially along the outer wall of the inner tube 7, and at the same time causing multiple outer scraper strips 27 to scrape circumferentially along the inner wall of the main pipe 2, thereby scraping off the condensate adhering to the outer wall of the inner tube 7 and the inner wall of the main pipe 2, and guiding the scraped condensate to the annular water collection tank 12 through the water guide strip 26 and the water collection ring 11.

[0073] When the main opening and closing plate 10 is in the second open position, the protrusion 17 continuously presses the touch switch 31, and the motor 28 drives the dewatering mechanism to run continuously. When the exhaust pressure difference decreases and the main opening and closing plate 10 rotates to the initial limit position, the protrusion 17 leaves the touch switch 31, the touch switch 31 is disconnected, and the motor 28 stops running, so as to avoid the dewatering mechanism from working continuously when there is no need for high humidity exhaust.

[0074] When the pressure difference between the inside and outside of the exhaust passage decreases, the opening torque acting on the micro-motion opening and closing plate 9 and the main opening and closing plate 10 decreases. Under its own gravity, the micro-motion opening and closing plate 9 rotates towards the inclined limiting surface inside the inner tube 7, and the main opening and closing plate 10 rotates towards the inclined limiting surface at the edge of the exhaust port 6 under its own gravity.

[0075] During the reset process of the main opening and closing plate 10, the rotating shaft drives the turntable 16 and the protrusion 17 to rotate to the initial position. After passing the guide slope of the stop block 21, the protrusion 17 returns to the initial end of the arc groove. When the water level in the water storage tank 14 drops, the floating plate 18, multiple pull rods 19, moving ring 20 and multiple stop blocks 21 descend and reset under the action of gravity, so that the stop block 21 re-enters the movement path of the protrusion 17.

[0076] The micro-motion opening and closing plate 9 and the main opening and closing plate 10 eventually abut against their respective inclined limiting surfaces and return to their initial limiting state with a 10° angle to the sealing plate 5. The inclined limiting surfaces restrict the two types of opening and closing plates from continuing to rotate in opposite directions, while simultaneously causing the inner tube 7 and multiple exhaust holes 6 to close again.

[0077] In this embodiment, the micro-motion opening and closing plate 9, the main opening and closing plate 10 and the water collecting ring 11 can be made of aluminum alloy or corrosion-resistant lightweight engineering plastic, and the inner scraper 25 and the outer scraper 27 can be made of silicone rubber or EPDM rubber that maintains flexibility under low temperature conditions.

[0078] The one-way drain valve adopts a duckbill type one-way valve or a gravity plate type one-way valve with a low opening head and automatic closing after draining. The motor 28 and the touch switch 31 can be existing products, and their specific structure and working principle will not be further explained here.

[0079] When the device is under a small pressure difference, the micro-motion opening and closing plate 9 opens and discharges a small amount of turbid gas through the inner pipe 7, while the main opening and closing plate 10 remains in the initial limit position, thereby reducing the heat loss through the main pipe 2 while meeting the basic ventilation requirements.

[0080] When the device is under a large pressure differential, multiple main opening and closing plates 10 open to the first open position, forming a high-flow exhaust channel in the main pipe 2. When the humidity of the discharged gas increases and condensate rapidly accumulates in the water storage tank 14, the floating plate 18 drives the stop block 21 to move upward through the pull rod 19 and the moving ring 20, releasing the first opening limit on the main opening and closing plates 10, allowing the main opening and closing plates 10 to continue rotating to the second open position.

[0081] After the main opening and closing plate 10 reaches the second open position, the protrusion 17 triggers the touch switch 31 and starts the motor 28, causing the inner scraper 25 and the outer scraper 27 to scrape water off the outer wall of the inner pipe 7 and the inner wall of the main pipe 2, respectively. The scraped-off condensate enters the water storage tank 14 through the water collection ring 11, the through hole 13, the annular water collection trough 12 and the connecting hole 15, and is discharged to the outside of the device through the one-way drain valve.

[0082] The above structure enables continuous linkage between the pressure difference inside and outside the exhaust channel, the humidity of the exhaust gas, the condensate accumulation status, the opening range of the main opening and closing plate 10, and the working status of the dehumidification mechanism. While improving the exhaust capacity under high humidity conditions, it also reduces condensate dripping into the room and its long-term retention inside the device, thereby lowering the risk of water accumulation and freeze-thaw cycles in low-temperature environments.

[0083] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A roof ventilation, heat insulation, freeze-thaw resistant, energy-saving exhaust device, comprising a base (1), characterized in that, A main pipe (2) is fixedly installed on the base (1). A sealing plate (5) is fixedly installed at the bottom of the main pipe (2). Multiple exhaust holes (6) are opened on the sealing plate (5). A rotating shaft is rotatably installed in each exhaust hole (6). A main opening and closing plate (10) is fixedly installed on each rotating shaft. An inner tube (7) is fixedly installed on the sealing plate (5). The inner tube (7) is coaxial with the sealing plate (5). A rotating shaft (2) is rotatably installed in the inner tube (7). A micro-movement opening and closing plate (9) is fixedly installed on the rotating shaft (2). Multiple water collecting rings (11) are fixedly installed on the inner wall of the main pipe (2) from top to bottom. A water storage tank (14) and multiple annular water collecting tanks (12) are provided inside the main pipe (2). Each annular water collecting tank (12) is respectively positioned opposite to the corresponding water collecting ring (11). Multiple sets of through holes (13) are provided on the inner wall of the main pipe (2). Each through hole (13) is interconnected with the corresponding annular water collecting tank (12). A connecting hole (15) is provided between the water storage tank (14) and the multiple annular water collecting tanks (12). The main pipe (2) is equipped with an opening adjustment component that cooperates with multiple rotating shafts, and the opening adjustment component gradually releases the opening restriction on the vent (6) according to the rise of the water level in the water tank (14).

2. The roof ventilation, heat insulation, freeze-thaw resistant, energy-saving exhaust device according to claim 1, characterized in that, The main pipe (2) is fixedly installed with a discharge pipe (3) at the top, and a filter screen (4) is fixedly installed at the end of the discharge pipe (3) away from the main pipe (2). The inner pipe (7) is fixedly installed with an elbow (8) at the top, and the elbow (8) is located inside the discharge pipe (3).

3. The roof ventilation, heat insulation, freeze-thaw resistant, energy-saving exhaust device according to claim 1, characterized in that, The opening adjustment assembly consists of a floating mechanism, multiple turntables (16), multiple protrusions (17), multiple arc grooves, and multiple stops (21). The multiple turntables (16) are respectively fixedly installed on one end of the corresponding rotating shaft located inside the main pipe (2). The multiple protrusions (17) are respectively fixedly installed on the side wall of the corresponding turntable (16). The multiple arc grooves are all opened inside the main pipe (2), and each arc groove cooperates with the corresponding protrusion (17). The multiple stops (21) are all installed inside the main pipe (2) through the floating mechanism, and each stop (21) cooperates with the corresponding protrusion (17).

4. The roof ventilation, heat insulation, freeze-thaw resistant, energy-saving exhaust device according to claim 3, characterized in that, The central angle of the arc groove is 90°. The end of the stop block (21) near the protrusion (17) is provided with a guide slope, and the angle between the guide slope and the movement direction of the protrusion (17) in the arc groove is 45°. The angle between the micro-motion opening and closing plate (9) and the main opening and closing plate (10) and the sealing plate (5) at the initial limit position is 10°.

5. A roof ventilation, heat insulation, freeze-thaw resistant, energy-saving exhaust device according to claim 3, characterized in that, The floating mechanism consists of a floating plate (18), a moving ring (20), and multiple tie rods. The floating plate (18) is slidably installed in the water storage tank (14). The main pipe (2) has an annular lifting groove. The moving ring (20) is slidably installed in the annular lifting groove. The bottom of the moving ring (20) is fixedly connected to multiple stops (21). Multiple tie rods are fixedly installed between the moving ring (20) and the floating plate (18). Multiple round holes that are sealed and slidably connected to the corresponding tie rods are opened between the water storage tank (14) and the annular lifting groove.

6. A roof ventilation, heat insulation, freeze-thaw resistant, energy-saving exhaust device according to claim 1, characterized in that, A rotating ring (22) is rotatably installed on the side wall of the inner tube (7), and a support rod (23) is fixedly installed on the rotating ring (22). Multiple fixed rings (24) are fixedly installed on the support rod (23), and each fixed ring (24) corresponds to the position of the corresponding water collection ring (11). A water removal mechanism is fixedly installed on the side wall of each fixed ring (24).

7. A roof ventilation, heat insulation, freeze-thaw resistant, energy-saving exhaust device according to claim 6, characterized in that, The water removal mechanism consists of an inner scraper (25), a water guide strip (26), and an outer scraper (27). The inner scraper (25) is fixedly installed on the side wall of the fixing ring (24) and is attached to the side wall of the inner tube (7). The water guide strip (26) is fixedly installed at the bottom of the inner scraper (25). The outer scraper (27) is fixedly installed at the end of the water guide strip (26) away from the inner scraper (25) and is attached to the inner wall of the main tube (2). The water guide strip (26) is inclined downward from the end near the inner scraper (25) to the end near the outer scraper (27).

8. A roof ventilation, heat insulation, freeze-thaw resistant, energy-saving exhaust device according to claim 6, characterized in that, A motor (28) is fixedly installed on the sealing plate (5), and a drive gear (29) is fixedly connected to the output end of the motor (28). An internal gear ring (30) is fixedly installed on the inner wall of the rotating ring (22), and the internal gear ring (30) meshes with the drive gear (29). A touch switch (31) is fixedly installed on the side wall of one of the arc grooves away from the protrusion (17), and the touch switch (31) is electrically connected to the motor (28).

9. A roof ventilation, heat insulation, freeze-thaw resistant, energy-saving exhaust device according to claim 1, characterized in that, The bottom of the water storage tank (14) is provided with a drain outlet, and a one-way drain valve is installed in the drain outlet. The inlet side of the one-way drain valve is connected to the water storage tank (14), and the outlet side of the one-way drain valve is connected to the outside of the main pipe (2). The effective flow area of ​​the drain outlet is smaller than the total flow area of ​​the multiple connecting holes (15).

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