A building ventilation device

Abstract

The present invention discloses a building ventilation device, which includes a ventilation duct. A filter screen is installed at the opening of the ventilation duct, and a cleaning member is installed on the filter screen. A support rod is fixedly connected inside the ventilation duct, and a fan for ventilation and driving the cleaning member is fixedly connected to the support rod. During operation, the fan can drive the fan blades to rotate, forming an air flow inside the ventilation duct. At the same time, the fan can also drive the cleaning member to rotate on the filter screen. When the cleaning member rotates downward to the upper part of the dust collection box, the dust swept into the cleaning member will automatically fall into the dust collection box under the action of gravity for collection and storage, preventing the dust from being adsorbed onto the filter screen again due to the wind force generated by the fan, and greatly improving the treatment efficiency of building waste gas.

Description

Technical Field

[0001] This application relates to the technical field of waste gas treatment, and particularly to a building ventilation device. Background Art

[0002] Building ventilation devices use various technical means, such as cyclone separation, electrostatic precipitation, wet scrubbing, and activated carbon adsorption, to effectively remove harmful particulate matter and pollutants in the waste gas, ensure that the discharged gas meets environmental protection standards, reduce environmental pollution, and protect the health of workers. However, during the actual use of building ventilation devices, when cleaning the dust on the filter screen, it is impossible to collect the cleaned dust, resulting in the dust being re-accumulated on the filter screen under the adsorption of the wind force of the fan. Summary of the Invention

[0003] The technical solution for the present invention to solve the above technical problems is as follows: A building ventilation device includes a ventilation duct, a filter screen is installed at the opening of the ventilation duct, a cleaning member is installed on the filter screen, a support rod is fixedly connected inside the ventilation duct, and a fan for ventilation and driving the cleaning member is fixedly connected to the support rod;

[0004] The cleaning member includes an inner housing and an outer housing respectively installed on the inner and outer sides of the filter screen. The inner housing and the outer housing are fixedly connected and arranged in a corresponding state. Sweeping bars are fixedly installed inside both the inner housing and the outer housing. The sweeping bars are arranged along the radial direction of the filter screen in a fitting manner, and there are gaps between both the inner housing and the outer housing and the filter screen.

[0005] Preferably, a transmission rod is further installed on one side of the inner housing, a first gear is fixedly connected to one side of the fan, one end of the transmission rod penetrates the filter screen and is fixedly connected to the inner housing and the outer housing, the other end of the transmission rod is fixedly connected to an internal gear, a gear set is installed on one side of the internal gear, the internal teeth of the internal gear mesh with the protruding gear of the gear set, and the internal teeth of the gear set mesh with the first gear.

[0006] Preferably, an ash accumulation box is provided below the cleaning member. An inclined rack is fixedly connected to the lower end of the outer housing. The ash accumulation box is slidably connected below the ventilation duct. A second gear is rotatably installed on one side of the ash accumulation box. A sleeve rod is inserted in the middle of the second gear. The inclined rack is matched with the second gear. One end of the sleeve rod is fixedly connected to a reciprocating lead screw, and a push plate is sleeved on the reciprocating lead screw. Brief Description of the Drawings

[0007] In order to more clearly illustrate the embodiments of the present invention or the existing technical solutions, the following will briefly introduce the drawings required for use in the description of the embodiments or the existing technical solutions. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0008] Figure 1 is a schematic three - dimensional structure diagram of a building ventilation device provided by an embodiment of the present application;

[0009] Figure 2 is a sectional view of the ventilation duct structure of a building ventilation device provided by an embodiment of the present application;

[0010] Figure 3 is an enlarged view of the structure of part A of a building ventilation device provided by an embodiment of the present application;

[0011] Figure 4 is an enlarged view of the structure of part B of a building ventilation device provided by an embodiment of the present application;

[0012] Figure 5 is a schematic diagram of the structure of a cleaning part of a building ventilation device provided by an embodiment of the present application;

[0013] Figure 6 is a schematic diagram of the structure of a gear set of a building ventilation device provided by an embodiment of the present application.

[0014] In the figure: 1, ventilation duct; 2, support rod; 3, fan; 4, first gear; 5, gear set; 6, internal gear; 7, transmission rod; 8, cleaning part; 9, filter screen; 10, counterweight; 11, inclined rack; 12, second gear; 13, sleeve rod; 14, impact rod; 15, reciprocating lead screw; 16, push plate; 17, dust collection box; 18, rope; 19, baffle; 20, pressure spring; 21, airbag; 22, sliding plate; 23, bell part; 81, outer housing; 82, inner housing; 83, dust sweeping strip. Detailed implementation manners

[0015] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0016] Please refer to Figures 1-6 , as shown in the figure, a building ventilation device provided by this embodiment includes a ventilation duct 1 and a fan 3. The fan 3 is fixedly connected to the inside of the ventilation duct 1 through a support rod 2. A fan blade is fixedly connected to the output shaft of the fan 3. A filter screen 9 is provided at the opening of the ventilation duct 1. A cleaning part 8 driven by the fan 3 is provided on the filter screen 9. A dust collection box 17 is provided below the cleaning part 8. Preferably, when the cleaning part 8 rotates above the dust collection box 17, the dust in the cleaning part 8 can automatically fall into the dust collection box 17.

[0017] Specifically, a support rod 2 is fixedly connected inside the air exchange duct 1, a fan 3 is fixedly connected to the support rod 2, and a fan blade is fixedly connected to one end of the fan 3 close to the filter screen 9. During operation, the fan 3 can drive the fan blade to rotate, forming an air flow inside the air exchange duct 1. At the same time, the fan 3 can also drive the cleaning member 8 to rotate on the filter screen 9. When the cleaning member 8 rotates downward to above the dust collection box 17, the dust swept into the cleaning member 8 will automatically fall into the dust collection box 17 under the action of gravity for collection and storage, preventing the dust from being adsorbed onto the filter screen 9 again due to the wind force generated by the fan 3.

[0018] Further, the cleaning member 8 includes an outer housing 81 disposed outside the filter screen 9 and an inner housing 82 disposed inside the filter screen 9. The transmission rod 7 passes through the central position of the filter screen 9 and is fixedly connected to the outer housing 81 and the inner housing 82. Dust sweeping strips 83 are provided in both the outer housing 81 and the inner housing 82 along the radial direction of the filter screen 9, and the dust sweeping strips 83 are arranged in contact with the filter screen 9.

[0019] Specifically, the cleaning member 8 includes an outer housing 81, an inner housing 82, and dust sweeping strips 83. Both the outer housing 81 and the inner housing 82 are fixedly connected to the transmission rod 7. When the transmission rod 7 rotates, it can drive the outer housing 81 and the inner housing 82 to rotate synchronously; there are gaps between both the outer housing 81 and the inner housing 82 and the filter screen 9. Preferably, the dust sweeping strips 83 are trapezoidal.

[0020] It can be understood that during dust sweeping, the reserved gaps prevent the dust on the filter screen 9 from being scraped off prematurely by the outer housing 81 and the inner housing 82. When the dust enters the interiors of the outer housing 81 and the inner housing 82, the trapezoidal dust sweeping strips 83 will scrape off the dust on the filter screen 9. After that, the dust can be temporarily stored between the outer housing 81 and the inner housing 82. At the same time, the outer housing 81 and the inner housing 82 can also protect the dust from being affected by the wind force of the fan 3, preventing the wind generated by the fan 3 from driving the dust to accumulate on the filter screen 9 again, or passing through the filter screen 9 and adhering to the fan blade and the fan 3, affecting the working efficiency of the fan 3; when the cleaning member 8 rotates to above the dust collection box 17, the dust stored in the outer housing 81 and the inner housing 82 will slide downward into the dust collection box 17 under the action of gravity.

[0021] It should be noted that although the cleaning and collection of dust have been achieved in the above embodiments, and the dust is prevented from re-accumulating on the filter screen 9 under the adsorption of the wind force of the fan 3, however, when the cleaning member 8 is directly driven by the fan 3 to rotate, the rotation speed of the cleaning member 8 is too fast, which not only affects the ventilation efficiency and the service life of the components, but also causes some dust to be prematurely thrown out due to the centrifugal force generated by the rotation and cannot be effectively collected. Therefore, further design can be made for the cleaning member 8, as detailed below:

[0022] Please refer further to Figure 3, One end of the transmission rod 7 is in transmission connection with the fan 3, and a cleaning member 8 is provided at the other end of the transmission rod 7. The output end of the fan 3 is also in transmission connection with the transmission rod 7, and a cleaning member 8 is fixedly connected to the end of the transmission rod 7 away from the fan 3. A gear set 5 and an internal gear 6 are also provided in the ventilation duct 1. The central position of the internal gear 6 is fixedly connected to the transmission rod 7. The internal teeth of the internal gear 6 are meshed with the protruding gear at the central position of the gear set 5. The internal teeth of the gear set 5 are meshed with the first gear 4 installed on one side of the fan blade of the fan 3; when the fan 3 works, it drives the transmission rod 7 to rotate, and then drives the cleaning member 8 to rotate.

[0023] Specifically, the inner side of the gear set 5 is provided with internal teeth, and a protruding gear protruding outward is also provided at the middle position of the gear set 5. The inner side of the internal gear 6 is also provided with internal teeth. The middle position of the internal gear 6 is fixedly connected to the transmission rod 7. The internal gear 6 can drive the transmission rod 7 to rotate synchronously. In addition, the gear set 5 can be rotatably fixed in the ventilation duct 1 on one side of the internal gear 6 through a connecting rod; a first gear 4 is fixedly connected to the fan blade of the fan 3 on the side close to the filter screen 9. The outer wall of the first gear 4 is meshed with the internal teeth of the gear set 5. When the first gear 4 rotates, it can drive the gear set 5 to rotate; the protruding gear at the central position of the gear set 5 is also meshed with the internal teeth of the internal gear 6. When the gear set 5 rotates, it can drive the internal gear 6 to rotate, and then drive the transmission rod 7 to rotate; through the arrangement of the gear set 5 and the internal gear 6, the rotation speed of the cleaning member 8 is reduced, preventing the cleaning member 8 from rotating too fast, avoiding affecting the ventilation efficiency and service life, and also preventing some dust from being prematurely thrown out due to the centrifugal force generated by rotation.

[0024] Further, please refer further to Figure 4 , A dust collection box 17 is provided below the cleaning member 8. The dust collection box 17 is slidably connected to the lower part of the ventilation duct 1. A second gear 12 is rotatably provided on one side of the dust collection box 17. A sleeve rod 13 is inserted at the central position of the second gear 12. One end of the sleeve rod 13 is fixedly connected to a reciprocating lead screw 15. The reciprocating lead screw 15 is disposed through the upper part inside the dust collection box 17. A push plate 16 is also sleeved on the reciprocating lead screw 15. An inclined rack 11 is further provided at the lower end of the outer shell 81 of the cleaning member 8. The inclined rack 11 is matched with the second gear 12.

[0025] Specifically, the dust collection box 17 is located below the cleaning member 8. When the cleaning member 8 is in a vertically downward state, the opening at the lower end of the cleaning member 8 is located at the opening at the upper end of the dust collection box 17; the second gear 12 is rotatably connected inside the ventilation duct 1, on the side of the dust collection box 17 away from the fan 3. An inclined rack 11 is fixedly connected to the lower end position of the outer wall of the outer shell 81 of the cleaning member 8. The inclined rack 11 is matched with the second gear 12. During the rotation of the cleaning member 8, when the inclined rack 11 rotates to the position of the second gear 12, it can be meshed with the second gear 12, thereby driving the second gear 12 to rotate.

[0026] It can be understood that during operation, the fan 3 can be started, and the fan 3 drives the fan blades to rotate to extract gas for ventilation. During this process, the fan 3 also drives the first gear 4 on one side of the fan blades to rotate. The rotation of the first gear 4 drives the gear set 5 to rotate. The rotation of the gear set 5 drives the internal gear 6 to rotate. The rotation of the internal gear 6 drives the cleaning member 8 to rotate through the transmission rod 7. When the cleaning member 8 rotates, the dust sweeping bar 83 scrapes and collects the dust accumulated on the filter screen 9 between the inner housing 82 and the outer housing 81. When the cleaning member 8 rotates to the vertically downward state, the dust scraped and collected inside the cleaning member 8 will fall into the ash accumulation box 17 under the action of gravity, so as to protect the dust from being adsorbed by the wind force of the fan 3, prevent the dust from accumulating on the filter screen 9 or passing through the filter screen 9 and adsorbing on the fan 3, resulting in a reduction in the ventilation efficiency, and achieve the efficient removal and collection of the dust on the filter screen 9; at the same time, the rotation of the cleaning member 8 drives the second gear 12 to rotate through the inclined rack 11. The rotation of the second gear 12 drives the sleeve rod 13 to rotate. The rotation of the sleeve rod 13 drives the reciprocating lead screw 15 to rotate. The rotation of the reciprocating lead screw 15 drives the push plate 16 to move reciprocally along the inner wall of the ash accumulation box 17. After the dust inside the ash accumulation box 17 accumulates to a certain extent, the dust is leveled to prevent the dust from only accumulating in a specific area inside the ash accumulation box 17 to form a conical accumulation, resulting in inefficient utilization of the space inside the ash accumulation box 17.

[0027] Further, a counterweight 10 is fixedly connected to the lower end of the inner housing 82.

[0028] Specifically, a counterweight 10 is fixedly connected to the lower end position of the outer wall of the inner housing 82 of the cleaning member 8; after the fan 3 stops working, since the fan 3 and the fan blades are in a power-off state, the counterweight 10 can drive the cleaning member 8 to vertically downward under the action of gravity, so that the dust temporarily stored inside the cleaning member 8 can all fall into the ash accumulation box 17.

[0029] Further, it also includes a striking rod 14 and a bell member 23. The striking rod 14 is fixedly connected to the sleeve rod 13 located between the ash accumulation box 17 and the second gear 12. A baffle 19 is also provided inside the ash accumulation box 17. The baffle 19 is elastically connected to the bottom of the ash accumulation box 17 through a pressure spring 20. An airbag 21 is provided at the bottom of the baffle 19. The other end of the airbag 21 penetrates the side wall of the ash accumulation box 17 and extends below the striking rod 14. A sliding plate 22 is provided on the airbag 21, and a bell member 23 is provided on the sliding plate 22.

[0030] Specifically, a collision rod 14 is also fixedly connected to one side of the sleeve rod 13. The collision rod 14 is located between the second gear 12 and the dust collection box 17. A baffle 19 is elastically connected inside the dust collection box 17. A pressure spring 20 is fixedly connected to the bottom of the baffle 19, and the other end of the pressure spring 20 is fixedly connected to the inner bottom end of the dust collection box 17. A gasbag 21 is also fixedly connected to one side of the bottom of the baffle 19 close to the second gear 12. A slide plate 22 is fixedly connected to the side of the gasbag 21 outside the dust collection box 17. The slide plate 22 is slidably connected to the outer wall of the dust collection box 17. A bell member 23 is fixedly connected to the top of the slide plate 22. Through the arrangement that the bell member 23 is composed of a bell and a spring fixedly connected to the slide plate 22, after the collision rod 14 hits the bell member 23, the bell can emit a loud alarm sound, and the bell member 23 is located below the collision rod 14.

[0031] It can be understood that when the dust inside the dust collection box 17 accumulates to a certain extent, the dust will squeeze the baffle 19 and descend along the inner wall of the dust collection box 17, causing the baffle 19 to squeeze the pressure spring 20 and the gasbag 21 to start contracting. Then, the gasbag 21 pushes the slide plate 22 to rise. The rise of the slide plate 22 will drive the bell member 23 to rise, so that when the sleeve rod 13 drives the collision rod 14 to rotate, the collision rod 14 can hit the bell member 23, causing the bell member 23 to continuously make a sound to remind the user that the dust accumulated inside the dust collection box 17 needs to be cleaned.

[0032] Further, a sliding groove is opened below the ventilation duct 1, and the dust collection box 17 is slidably connected in the sliding groove. A pull rope fixedly connected to the dust collection box 17 is also provided in the sliding groove.

[0033] Specifically, a rope 18 is fixedly connected to the outer wall of the dust collection box 17. The rope 18 is arranged in the sliding groove inside the ventilation duct 1; pulling the rope 18 can drive the dust collection box 17 to move in the sliding groove, which is convenient for cleaning; when the dust inside the dust collection box 17 is cleaned, the dust collection box 17 can be reinserted into the sliding groove of the ventilation duct 1 and the dust collection box 17 can be driven to reset by pulling the rope 18. The reset of the dust collection box 17 will drive the sleeve rod 13 to reinsert into the inside of the second gear 12, so that the second gear 12 can drive the collision rod 14 and the reciprocating lead screw 15 to rotate again through the sleeve rod 13. At the same time, after the dust inside the dust collection box 17 is removed, the pressure spring 20 will drive the baffle 19 to rise and reset, and the rise of the baffle 19 will pull the gasbag 21 to reset, so that the gasbag 21 cannot continue to push the slide plate 22 to rise, and then the slide plate 22 drives the bell member 23 to reset, waiting for the next work.

[0034] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An architectural ventilation device, comprising a ventilation duct (1), characterized in that: A filter screen (9) is installed at the opening of the ventilation duct (1), a cleaning member (8) is installed on the filter screen (9), a support rod (2) is fixedly connected inside the ventilation duct (1), and a fan (3) for ventilation and driving the cleaning member (8) is fixedly connected to the support rod (2); The cleaning member (8) includes an inner housing (82) and an outer housing (81) respectively installed on the inner and outer sides of the filter screen (9). The inner housing (82) and the outer housing (81) are fixedly connected and arranged in a corresponding state. Dust-sweeping strips (83) are fixedly installed inside both the inner housing (82) and the outer housing (81). The dust-sweeping strips (83) are arranged along the radial direction of the filter screen (9) in a fitting manner, and gaps are left between both the inner housing (82) and the outer housing (81) and the filter screen (9); A transmission rod (7) is further installed on one side of the inner housing (82). A first gear (4) is fixedly connected to one side of the fan (3). One end of the transmission rod (7) penetrates through the filter screen (9) and is fixedly connected to the inner housing (82) and the outer housing (81). The other end of the transmission rod (7) is fixedly connected to an internal gear (6). A gear set (5) is installed on one side of the internal gear (6). The internal teeth of the internal gear (6) are meshed with the protruding gears of the gear set (5), and the internal teeth of the gear set (5) are meshed with the first gear (4); A dust accumulation box (17) is arranged below the cleaning member (8). An inclined rack (11) is fixedly connected to the lower end of the outer housing (81). The dust accumulation box (17) is slidably connected below the ventilation duct (1). A second gear (12) is rotatably arranged on one side of the dust accumulation box (17). A sleeve rod (13) is inserted in the middle of the second gear (12). The inclined rack (11) is matched with the second gear (12). One end of the sleeve rod (13) is fixedly connected to a reciprocating lead screw (15). A push plate (16) is sleeved on the reciprocating lead screw (15).

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