Elevator car air purification constant-pressure device

Abstract

The invention relates to the technical field of elevator cars, and provides an elevator car air purification constant pressure device which comprises an air pressure sensor and a controller in signal connection with the air pressure sensor and further comprises a shell, a first conical cover is fixed to one end of the shell, and a second conical cover is fixed to the other end of the shell. The first conical cover and the second conical cover are used for alternately filtering air entering the elevator car; cleaning mechanisms are arranged outside the first conical cover and the second conical cover; a supporting part is fixed in the shell; seamless connection of filtering and cleaning is achieved through the alternate working mode of the first conical cover and the second conical cover, when the air pressure of the conical cover on one side is reduced due to dust accumulation, the pneumatic component is automatically switched to the other side to continue to supply air, it is ensured that the air pressure in the elevator car is constant, and the safety is improved. And the problem of ventilation interruption caused by shutdown maintenance of traditional single-filter-element equipment is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator cars, and in particular to an elevator car air purification constant pressure device. Background Art

[0002] The air purification system of an elevator car generally consists of a fan and a filter device. The fan draws in the dirty air in the car, filters it through the filter device to achieve purification, and then sends it back into the car by the fan. For example, an elevator car roof with an air purification function disclosed in announcement number CN222006968U includes a car roof panel installed on the elevator car, a suspended ceiling installed on the car roof panel, a receiving cavity formed between the car roof panel and the suspended ceiling, a matching blower and air purifier are provided in the receiving cavity, an air supply port and a return air port connected to the interior space of the elevator are formed on the suspended ceiling, a pre-filter is provided between the return air port and the air purifier, and a mounting base is detachably connected to the suspended ceiling. By setting a pre-filter between the air purifier and the return air outlet, the dirty airflow can be preliminarily filtered before entering the air purifier, thereby extending the service life of the air purifier and reducing its maintenance frequency. Through the coordination of the quick-release plate and the card frame, the staff can remove the pre-filter. Compared with the air purifier, the pre-filter is easier to clean and disassemble.

[0003] However, existing elevator car air purification systems have the following problems: the air inlet of the filter device is easily clogged with dust over a long period of time, causing the intake air flow rate to be significantly smaller than the exhaust air flow rate, which in turn causes the air pressure inside the elevator car to decrease, affecting riding comfort. Most existing elevator car air purification systems use a single filter element, and the equipment needs to be shut down for maintenance, resulting in ventilation interruption. In addition, traditional filter screens accumulate dust and need to be manually disassembled and cleaned, resulting in low efficiency and affecting usage. Summary of the Invention

[0004] The present invention provides an elevator car air purification constant pressure device, which solves the problems in the prior art of air inlet being blocked by dust and traditional filter screens being dust-accumulated and requiring manual disassembly and cleaning.

[0005] The technical solution of the present invention is as follows: an elevator car air purification constant pressure device, comprising an air pressure sensor and a controller connected to the air pressure sensor signal, and also comprising a housing, a first conical cover fixed to one end of the housing, and a second conical cover fixed to the other end of the housing, the first conical cover and the second conical cover being used to alternately filter the air entering the elevator car; A cleaning mechanism is provided outside the first conical cover and the second conical cover; A supporting component is fixed in the housing; The support component is provided with a pneumatic component and a driving component which is controlled by a controller and can drive the pneumatic component to axially extend and slide. When the pneumatic component extends and contracts, the cleaning mechanisms at both ends can respectively scrape and blow the first conical cover or the second conical cover. An air duct leading to the elevator car is provided at the bottom of the pneumatic component, and an elastic flow guide is provided on the inner side of the top of the air duct. When the pneumatic component extends toward the first conical cover, the air duct communicates with the air path of the second conical cover through the elastic flow guide. When the pneumatic component extends toward the second conical cover, the air duct communicates with the air path of the first conical cover through the elastic flow guide.

[0006] Preferably, a clamping cavity is provided in each of the first conical cover and the second conical cover, and an air inlet communicating with the clamping cavity is provided on the outer surface of each of the first conical cover and the second conical cover.

[0007] Preferably, the cleaning mechanism includes a movable rod, which is rotatably connected to the first conical cover or the second conical cover, and a plurality of brush plates are fixed to the outside of one end of the movable rod, and a cleaning brush is fixed on the brush plate that fits the outer surface of the first conical cover or the second conical cover, and the outer surface of the movable rod is provided with a spiral blade.

[0008] Preferably, the movable rod is a hollow structure, an air guide hole communicating with the clamping cavity is provided on the movable rod, and a piston is fixed on the outer side of one end of the movable rod away from the brush plate.

[0009] Preferably, the supporting component includes two supporting plates, and the two supporting plates are respectively fixed to the two inner ends of the shell, and a guide tube is fixed through the two supporting plates.

[0010] Preferably, the pneumatic component includes a telescopic tube, the outer side surface of the telescopic tube is provided with a guide ridge slidably connected to the guide tube, the telescopic tube is provided with two air cavities for limiting the sliding of the piston, the movable rod is provided with two air guide holes communicating with the air cavity, pressure rods in contact with the spiral blades are symmetrically fixed to the outer ends of the two air cavities, a through hole is provided at the bottom of the inner ends of the two air cavities, and a rubber ring is fixed outside the through hole to close the through hole when the through hole is staggered with the air guide tube.

[0011] Preferably, the driving component includes an electric telescopic rod, which is fixed between two support plates. The output end of the electric telescopic rod passes through the support plates and is fixed with a push plate, which is fixed outside the telescopic tube.

[0012] Preferably, the air guide tube is fixed to the bottom of the guide tube, a lining is provided on the inner side of the upper end of the air guide tube, the air pressure sensor is installed on the lower end of the air guide tube, and an exhaust hole is provided on the outer side of the lower end of the air guide tube.

[0013] Preferably, the elastic flow guide comprises a sphere, which is elastically connected to the inner side of the top of the air guide tube via a spring, and a circular hole is provided on the sphere, and the diameter of the sphere is larger than the through hole and the inner diameter of the air guide tube.

[0014] Preferably, a rubber pad is fixed to the upper end of the liner to cushion the compression of the sphere.

[0015] The beneficial effects of the present invention are: The present invention achieves seamless filtration and cleaning through the alternating working modes of the first and second cone covers. When the air pressure drops on one cone cover due to dust accumulation, the pneumatic components automatically switch to the other side to continue supplying air, ensuring a constant air pressure in the elevator car and avoiding the ventilation interruption problem caused by the need to shut down for maintenance of traditional single-filter equipment. The telescopic movement of the pneumatic component in the present invention triggers a dual cleaning action synchronously through the pressure rod, thereby having a purge function, that is, the compressed air in the air cavity is blown back into the conical cover clamping cavity through the air guide hole, and the airflow is used to remove attached particles. It also has a brushing function, that is, the spiral blade is squeezed by the pressure rod to drive the movable rod to rotate, driving the cleaning brush to physically scrape the surface of the filter screen, solving the pain point of the traditional filter screen that needs manual disassembly and cleaning due to dust accumulation; The elastic flow guide of the present invention adopts a combined structure of a sphere and a rubber ring. When the telescopic tube is displaced, the air path is automatically switched. When the through hole and the air guide tube are aligned, a passage is formed. When they are misaligned, the rubber ring closes the original air path. The sphere is acted upon by the spring to seal the transition area, thus preventing airflow from diffusing. The closed-loop system, comprised of an air pressure sensor and controller, dynamically monitors the pressure differential between the inside and outside of the cabin. When the pressure differential exceeds a threshold, the controller immediately triggers a cleanup procedure, ensuring the air pressure remains within a set range and enhancing passenger comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] Figure 1 This is a structural schematic diagram of an elevator car air purification constant pressure device proposed by the present invention; Figure 2 This is a schematic cross-sectional view of an elevator car air purification constant pressure device proposed by the present invention; Figure 3 This is a schematic diagram of the half-section structure of the shell proposed by the present invention; Figure 4 This is a schematic diagram of the half-section structure of the pneumatic component proposed by the present invention; Figure 5 This is a schematic diagram of the cleaning mechanism structure proposed by the present invention; Figure 6 for Figure 2 A in the middle is an enlarged structural diagram; Figure 7 for Figure 2 The enlarged structural diagram at B in the middle; Figure 8 This is a schematic diagram of the half-section structure of the airway tube proposed in the present invention; Figure 9 This is a schematic diagram of the structure of the driving component and pneumatic component proposed in the present invention; In the figure: 1. shell; 2. first conical cover; 21. clamping cavity; 22. air inlet; 3. second conical cover; 4. cleaning mechanism; 41. movable rod; 42. brush plate; 43. cleaning brush; 44. piston; 45. spiral blade; 46. air guide hole 1; 47. air guide hole 2; 5. supporting component; 51. supporting plate; 52. guide tube; 6. pneumatic component; 61. telescopic tube; 62. guide rib; 63. air cavity; 64. through hole; 65. rubber ring; 66. pressure rod; 7. driving component; 71. electric telescopic rod; 72. push plate; 8. air guide tube; 81. lining platform; 82. rubber pad; 83. exhaust hole; 9. elastic flow guide; 91. sphere; 92. spring; 93. round hole; 10. air pressure sensor. DETAILED DESCRIPTION

[0018] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 making any creative efforts are within the scope of protection of the present invention.

[0019] See also Figure 1 and Figure 2 The present invention provides a technical solution: an elevator car air purification constant pressure device, including an air pressure sensor 10 and a controller connected to the air pressure sensor 10 signal, and also including a shell 1, one end of the shell 1 is fixed with a first conical cover 2, and the other end of the shell 1 is fixed with a second conical cover 3, the first conical cover 2 and the second conical cover 3 are used to alternately filter the air entering the elevator car, the closed-loop system composed of the air pressure sensor 10 and the controller can dynamically monitor the pressure difference between the inside and outside of the car. When the pressure difference exceeds the threshold, the controller immediately triggers the cleaning program to ensure that the air pressure is stable within the set range and improve riding comfort.

[0020] See also Figure 4A cleaning mechanism 4 is provided outside the first conical cover 2 and the second conical cover 3. The cleaning mechanism 4 includes a movable rod 41, which is rotatably connected to the first conical cover 2 or the second conical cover 3. A plurality of brush plates 42 are fixed to the outside of one end of the movable rod 41, and a cleaning brush 43 is fixed on the brush plate 42, which is in contact with the outer surface of the first conical cover 2 or the second conical cover 3. A spiral blade 45 is provided on the outer surface of the movable rod 41. The movable rod 41 is a hollow structure. An air guide hole 46 communicating with the clamping cavity 21 is opened on the movable rod 41, and a piston 44 is fixed to the outside of the end of the movable rod 41 away from the brush plate 42.

[0021] See also Figure 3 A supporting component 5 is fixed inside the shell 1, and the supporting component 5 includes two supporting plates 51. The two supporting plates 51 are respectively fixed at the two ends of the inner side of the shell 1. A guide tube 52 is fixed between the two supporting plates 51. The guide tube 52 integrates guidance and support. The double supporting plates 51 constrain the axial movement trajectory of the pneumatic component 6 through the guide tube 52, and at the same time provide a mounting base for the cleaning mechanism 4, making the spatial layout more compact.

[0022] See also Figure 4 and Figure 9 The support component 5 is provided with a pneumatic component 6 and a driving component 7 which can drive the pneumatic component 6 to axially extend and slide under the control of the controller. The driving component 7 includes an electric telescopic rod 71, which is fixed between the two support plates 51. The output end of the electric telescopic rod 71 passes through the support plate 51 and is fixed with a push plate 72. The push plate 72 is fixed to the outside of the telescopic tube 61. When the pneumatic component 6 moves in an extension and contraction manner, the cleaning mechanisms 4 at both ends can respectively scrape and blow the first conical cover 2 or the second conical cover 3.

[0023] See also Figure 7 and Figure 8The bottom of the pneumatic component 6 is provided with an air duct 8 leading to the elevator car. The air duct 8 is fixed to the bottom of the guide tube 52. A lining 81 is provided on the inner side of the upper end of the air duct 8. The air pressure sensor 10 is installed on the lower end of the air duct 8. An exhaust hole 83 is provided on the outer side of the lower end of the air duct 8. An elastic flow guide 9 is provided on the inner side of the top of the air duct 8. The elastic flow guide 9 includes a sphere 91. The sphere 91 is elastically connected to the inner side of the top of the air duct 8 by a spring 92. A circular hole 93 is provided on the sphere 91. The diameter of the sphere 91 is larger than the through hole 64. And the inner diameter of the air guide tube 8, the upper end of the lining 81 is fixed with a rubber pad 82 for buffering the compression of the ball 91. The elastic guide member 9 adopts a combined structure of the ball 91 and the rubber ring 65. When the telescopic tube 61 is displaced, the air path is automatically switched. When the through hole 64 is aligned with the air guide tube 8, a passage is formed. When it is misaligned, the rubber ring 65 closes the original air path. The ball is sealed in the transition area by the spring 92 to prevent airflow diffusion. The rubber pad 82 set at the end of the air guide tube 8 buffers the impact load of the ball 91, adapts to the high-frequency vibration environment during elevator operation, and ensures air tightness.

[0024] See also Figure 4 and Figure 6 When the pneumatic component 6 extends to one side of the first conical cover 2, the air guide pipe 8 communicates with the air path of the second conical cover 3 through the elastic guide piece 9. When the pneumatic component 6 extends to one side of the second conical cover 3, the air guide pipe 8 communicates with the air path of the first conical cover 2 through the elastic guide piece 9. Through the alternating working mode of the first conical cover 2 and the second conical cover 3, a seamless connection of filtering and cleaning is achieved. When the air pressure drops due to dust accumulation on one side of the conical cover, the pneumatic component 6 automatically switches to the other side to continue supplying air, ensuring that the air pressure in the elevator car is constant. The pneumatic component 6 includes a telescopic tube 61. The outer side of the telescopic tube 61 is provided with a guide ridge 62 that is slidably connected to the guide tube 52. The telescopic tube 61 is provided with two sections of air cavities 63 that limit the sliding of the piston 44. The movable rod 41 is provided with an air guide hole 47 that communicates with the air cavity 63. , a pressure rod 66 in contact with the spiral blade 45 is symmetrically fixed to the outer end of the two-section air cavity 63, and a through hole 64 is opened at the bottom of the inner end of the two-section air cavity 63, and a rubber ring 65 is fixed outside the through hole 64 to close the through hole 64 when the through hole 64 is staggered with the air guide tube 8. The telescopic movement of the pneumatic component 6 triggers a double cleaning action synchronously through the pressure rod 66, thereby having a purge function, that is, the compressed air in the air cavity 63 is blown back into the conical cover clamping cavity through the air guide hole 46, and the airflow is used to peel off the attached particles. It also has a brushing function, that is, the spiral blade 45 is squeezed by the pressure rod to drive the movable rod 41 to rotate, driving the cleaning brush 43 to physically scrape the surface of the filter screen. The integrated design of the brush plate 42 and the spiral blade 45 realizes self-cleaning through pneumatic kinetic energy, reduces the frequency of equipment shutdown maintenance, and reduces operation and maintenance costs.

[0025] See also Figure 2 and Figure 6A clamping cavity 21 is provided in the first conical cover 2 and the second conical cover 3, and an air inlet 22 communicating with the clamping cavity 21 is provided on the outer surface of the first conical cover 2 and the second conical cover 3. The conical cover structure expands the contact surface between the filter area and the air flow channel. The conical cover can adopt a HEPA filter to improve the air purification efficiency per unit time.

[0026] The working principle and use process of the present invention are as follows: In the initial state, Figure 2 As shown, the air guide pipe 8 is connected to the right through hole 64 through the sphere 91, so that the external air enters the elevator car after being filtered by the second conical cover 3. When there is a lot of dust on the surface of the second conical cover 3 and the air inlet 22 is blocked, resulting in a decrease in the air pressure inside the elevator car, the air pressure sensor 10 can automatically detect and feedback to the controller, so that the electric telescopic rod 71 starts to drive the telescopic tube 61 to slide to the right through the push plate 72 under the control of the controller. At this time, the right piston 44 starts to compress the air in the right air cavity 63 and blows it out from the air inlet 22 of the second conical cover 3, thereby blowing open the blockage of the air inlet 22 from the inside. At the same time, due to the pressure rod 66 on the inner side of the end of the telescopic tube 61 squeezing the spiral blade 45 outside the movable rod 41, the movable rod 41 is forced to drive the brush plate 42 to rotate outside the second conical cover 3, and then the cleaning brush 43 on the brush plate 42 cooperates with the blowing of the air flow to clean the outer surface of the second conical cover 3. When the telescopic tube 61 extends toward the second conical cover 3, the ball 91 is compressed by the telescopic tube 61 to compress the spring 92 and shrink into the air guide tube 8. As the telescopic tube 61 slides, the air guide tube 8 and the right through-hole 64 are staggered. The right through-hole 64 is sealed with the guide tube 52 through the external rubber ring 65 until the through-hole 64 on the left moves to the position of the air guide tube 8. At this time, the ball 91 automatically bounces up under the elastic force of the spring 92 and is embedded in the through-hole 64 on the left to achieve the positioning of the telescopic tube 61. At this time, the air guide tube 8 is connected to the air path of the first conical cover 2 on the left through the ball 91, thereby completely switching the air intake, so that the outside air enters the elevator car after being filtered through the first conical cover 2, and the air pressure in the elevator car returns to normal. Similarly, when there is a lot of dust on the surface of the first conical cover 2 and the air inlet 22 is blocked, causing the air pressure inside the elevator car to drop, the air pressure sensor 10 can automatically detect and feedback to the controller, so that the electric telescopic rod 71 starts to drive the telescopic tube 61 to slide to the left through the push plate 72 under the control of the controller until the air intake is completely switched, so that the external air enters the elevator car after being filtered through the second conical cover 3 again, so that the air pressure in the elevator car returns to normal. The above method realizes automatic cleaning of the air inlet of the elevator car, ensuring that the interior of the elevator car is in a constant pressure state.

[0027] This technology is particularly suitable for areas with densely populated high-rise buildings. It effectively addresses the issues of insufficient air quality and pressure in elevators caused by the high floors and long passenger cycles of high-rise buildings, while also reducing property management costs through automated maintenance. Its modular design also facilitates integration into existing elevator ventilation systems, promising broad commercial prospects.

[0028] The above are only 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 principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An elevator car air purification constant pressure device, comprising an air pressure sensor (10) and a controller connected to the air pressure sensor (10) signal, characterized in that: It also includes a shell (1), a first conical cover (2) is fixed to one end of the shell (1), and a second conical cover (3) is fixed to the other end of the shell (1), and the first conical cover (2) and the second conical cover (3) are used to alternately filter the air entering the elevator car; A cleaning mechanism (4) is provided outside the first conical cover (2) and the second conical cover (3); A supporting component (5) is fixed in the housing (1); The support component (5) is provided with a pneumatic component (6) and a driving component (7) which is controlled by a controller and can drive the pneumatic component (6) to axially extend and slide. When the pneumatic component (6) is in telescopic motion, the cleaning mechanisms (4) at both ends can respectively perform scraping and blowing cleaning on the first conical cover (2) or the second conical cover (3); An air duct (8) leading to the elevator car is provided at the bottom of the pneumatic component (6), and an elastic flow guide (9) is provided on the inner side of the top of the air duct (8). When the pneumatic component (6) extends toward the first conical cover (2), the air duct (8) communicates with the air path of the second conical cover (3) through the elastic flow guide (9). When the pneumatic component (6) extends toward the second conical cover (3), the air duct (8) communicates with the air path of the first conical cover (2) through the elastic flow guide (9).

2. An elevator car air purification constant pressure device according to claim 1, characterized in that: A clamping cavity (21) is provided in each of the first conical cover (2) and the second conical cover (3), and an air inlet (22) communicating with the clamping cavity (21) is provided on the outer surfaces of each of the first conical cover (2) and the second conical cover (3).

3. An elevator car air purification constant pressure device according to claim 2, characterized in that: The cleaning mechanism (4) includes a movable rod (41) which is rotatably connected to the first conical cover (2) or the second conical cover (3). A plurality of brush plates (42) are fixed to the outer side of one end of the movable rod (41), and a cleaning brush (43) is fixed on the brush plate (42) and is attached to the outer surface of the first conical cover (2) or the second conical cover (3). The outer surface of the movable rod (41) is provided with a spiral blade (45).

4. An elevator car air purification constant pressure device according to claim 3, characterized in that: The movable rod (41) is a hollow structure. An air guide hole (46) communicating with the clamping cavity (21) is provided on the movable rod (41). A piston (44) is fixed to the outer side of one end of the movable rod (41) away from the brush plate (42).

5. An elevator car air purification constant pressure device according to claim 4, characterized in that: The support component (5) comprises two support plates (51), the two support plates (51) being fixed to the inner ends of the shell (1) respectively, and a guide tube (52) passing through and fixed between the two support plates (51).

6. An elevator car air purification constant pressure device according to claim 5, characterized in that: The pneumatic component (6) includes a telescopic tube (61), the outer side surface of the telescopic tube (61) is provided with a guide ridge (62) slidably connected to the guide tube (52), the telescopic tube (61) is provided with two air cavities (63) for slidingly limiting the piston (44), the movable rod (41) is provided with two air guide holes (47) communicating with the air cavities (63), the outer ends of the two air cavities (63) are symmetrically fixed with pressure rods (66) in contact with the spiral blades (45), the inner ends of the two air cavities (63) are provided with through holes (64) at the bottom, and the through holes (64) are fixed with rubber rings (65) outside the through holes (64) for closing the through holes (64) when the through holes (64) and the air guide tube (8) are offset.

7. An elevator car air purification constant pressure device according to claim 6, characterized in that: The driving component (7) comprises an electric telescopic rod (71), the electric telescopic rod (71) being fixed between two support plates (51), the output end of the electric telescopic rod (71) passing through the support plates (51) and being fixed with a push plate (72), the push plate (72) being fixed outside the telescopic tube (61).

8. The elevator car air purification constant pressure device according to claim 6, characterized in that: The air guide tube (8) is fixed to the bottom of the guide tube (52), a lining (81) is provided on the inner side of the upper end of the air guide tube (8), the air pressure sensor (10) is installed on the lower end of the air guide tube (8), and an exhaust hole (83) is provided on the outer side of the lower end of the air guide tube (8).

9. An elevator car air purification constant pressure device according to claim 8, characterized in that: The elastic flow guide (9) comprises a sphere (91), the sphere (91) being elastically connected to the inner side of the top of the air guide tube (8) via a spring (92), a circular hole (93) being provided on the sphere (91), and a diameter of the sphere (91) being larger than the through hole (64) and the inner diameter of the air guide tube (8).

10. An elevator car air purification constant pressure device according to claim 9, characterized in that: A rubber pad (82) is fixed to the upper end of the lining (81) for buffering the sphere (91) when it is compressed.

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