Ventilation device for elevator car

Abstract

The invention discloses a ventilation device for an elevator car, and belongs to the technical field of car ventilation. The ventilation device mainly comprises a compartment body and a ventilation assembly, the ventilation assembly is installed on the compartment body and comprises a top plate, the top plate is installed on the top of the compartment body, two sets of fans and a reverse rotation unit are installed on the top plate, and the reverse rotation unit is arranged on the top plate and provided with a bearing and an outer gear ring installed on the top plate. Teeth are arranged on the inner side and the outer side of the outer gear ring, the first driven wheel is meshed with the inner ring of the outer gear ring, the second driven wheel is meshed with the outer ring of the outer gear ring, the dust filtering mechanism is arranged at the position, close to the fans, of the bottom of the top plate, and the dust filtering mechanism is provided with filter screens installed at the bottoms of the fans. The bottom frame is arranged on the outer ring of the filter screen, and a brush is mounted on the bottom frame in a sliding manner. According to the ventilation device for the elevator car, the effects that air in the car continuously circulates, and air flow is filtered are achieved.

Description

Technical Field

[0001] This application relates to the technical field of car ventilation, and specifically relates to a ventilation device for an elevator car. Background Art

[0002] The elevator car is a key component of the elevator system, used to carry passengers or goods. In order to ensure the comfort of the air inside the elevator and prevent the interior of the car from getting damp, a ventilation device is usually adopted to ventilate the interior of the car.

[0003] In existing elevator cars, a single set of fans is usually used to ventilate the interior of the car, and a filter is installed on the fan to filter dust and debris in the air flow.

[0004] However, when the fan ventilates the car, since there is only one set of fans, which is a single-fan ventilation system, the ventilation direction of the elevator control cabinet is single. And the single-fan ventilation system may have certain limitations in terms of ventilation effect. Because the single-direction ventilation requires the fan to switch back and forth between air supply and exhaust to achieve unobstructed air inside the car. However, this method is an intermittent switching type, making it relatively inconvenient to replace the air flow inside the car, and it cannot achieve continuous circulation of the air inside the car. Therefore, a ventilation device for an elevator car is needed to solve the above problems.

[0005] It should be noted that the above information disclosed in this background art section is only used to understand the background art of the concept of this application, and therefore, it may include information that does not constitute the prior art. Summary of the Invention

[0006] Based on the above problems existing in the prior art, the problem to be solved by this application is: to provide a ventilation device for an elevator car, achieving the effect of continuous circulation of the air inside the car and filtering the air flow.

[0007] To achieve the above object, the present application provides the following technical solution: A ventilation device for an elevator car, comprising a car body and a ventilation assembly. The ventilation assembly is installed on the car body. The ventilation assembly includes a top plate installed on the top of the car body. Two groups of fans are installed on the top plate, and a reverse unit is provided on the top plate. The reverse unit has an external gear ring with a bearing installed on the top plate, and a first driven wheel and a second driven wheel respectively arranged on the two groups of fans. Teeth are provided on both the inner and outer sides of the external gear ring. The first driven wheel meshes with the inner ring of the external gear ring, and the second driven wheel meshes with the outer ring of the external gear ring. A dust filtering mechanism is provided at the bottom of the top plate near the fans. The dust filtering mechanism has a filter screen installed at the bottom of the fan and a bottom frame arranged on the outer circle of the filter screen. A brush is slidably installed on the bottom frame. The two groups of fans are adapted to rotate relatively in opposite directions in cooperation with the external gear ring, the first driven wheel and the second driven wheel to form a circulating air flow.

[0008] Preferably, the reverse unit further includes a driving wheel disposed inside the external gear ring, and the driving wheel meshes with the inner ring of the external gear ring.

[0009] Preferably, the driving wheel and the first driven wheel are on the central cross-section line of the external gear ring.

[0010] Preferably, a top frame is provided on the top plate, and a first motor is fixed on the top frame. The output end of the first motor is connected to the driving wheel.

[0011] Preferably, dust collecting boxes for collecting dust debris are provided on both sides of the brush.

[0012] Preferably, a screw rod is installed on the bottom frame with a bearing, and the screw rod is threadedly connected to the brush.

[0013] Preferably, a driving part is provided on the side wall of the top of the car body. The driving part consists of a second motor installed on the side wall of the top of the car body and a transmission unit arranged between the second motor and the end of the screw rod. The transmission unit is a belt transmission structure.

[0014] Preferably, the transmission unit consists of two groups of belt pulleys and a transmission belt wrapped around the two groups of belt pulleys. The two groups of belt pulleys are respectively installed on the second motor and the end of the screw rod.

[0015] Preferably, the bottom frame extends out of both sides of the filter screen to form a pending area for storing the brush.

[0016] Preferably, guide rails are provided at the bottom of the car body, and two groups of car doors are slidably installed on the guide rails. The car doors are adapted to open and close the car body.

[0017] The beneficial effects of this application are as follows: A ventilation device for an elevator car provided by this application, through the cooperation of the external gear ring with the first driven wheel and the second driven wheel, enables the two groups of fans to rotate in opposite directions relative to each other, thereby achieving the purpose of forming a circulating air flow inside the car body. And under the action of the screw rod, it drives the brush to brush the filter screen, and in cooperation with the dust collection box, collects the dust and debris, thereby achieving the purpose of preventing the accumulation of dust and debris on the filter screen, and achieving the effect of continuous air circulation inside the car and filtering the air flow.

[0018] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. The following will refer to the drawings to further elaborate on this application in detail. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings forming a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application. In the drawings:

[0020] Figure 1 is the overall schematic diagram of a ventilation device for an elevator car in this application;

[0021] Figure 2 is Figure 1 the cross-sectional schematic diagram of the car in;

[0022] Figure 3 is Figure 2 the enlarged schematic diagram of part A in;

[0023] Figure 4 is Figure 3 the structural schematic diagram of the reverse unit in;

[0024] Figure 5 is Figure 4 the structural schematic diagram of the dust filtering mechanism in;

[0025] Among them, the reference numerals in the drawings are as follows:

[0026] 1, car body; 11, car door; 12, guide rail;

[0027] 2, ventilation assembly; 21, first motor; 211, top frame; 22, top plate; 23, fan; 24, reverse unit; 241, driving wheel; 242, external gear ring; 243, first driven wheel; 244, second driven wheel;

[0028] 3, dust filtering mechanism; 31, filter screen; 32, bottom frame; 33, brush; 331, dust collection box; 34, driving part; 341, second motor; 342, transmission unit; 35, screw rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following will describe the present application in detail with reference to the drawings and in combination with the embodiments.

[0030] In order to enable those skilled in the art to better understand the solution of the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present application.

[0031] As Figure 1 shown, the present application provides a ventilation device for an elevator car, including a car body 1 and guide rails 12 installed at the bottom of the car body 1. Two sets of car doors 11 are slidably installed on the guide rails 12, and the two sets of car doors 11 are adapted to approach or move away from each other under the action of an external driving force to realize the opening and closing of the car body 1;

[0032] In the present application, the above external driving force adopts a door machine system, which is a prior art. For details, please refer to the patent with the publication number CN105270971B, and no more details will be elaborated here;

[0033] As Figures 2 - 4 shown, a ventilation component 2 is installed on the top of the car body 1. The ventilation component 2 is used for ventilating the inside of the car body 1. The ventilation component 2 includes a top plate 22 fixed to the top of the car body 1 and fans 23 installed on the top plate 22 by bearings. Both sets of fans 23 are located above the inside of the car body 1. At the same time, a reverse rotation unit 24 is installed on the top plate 22. The reverse rotation unit 24 is used to rotate the two sets of fans 23 in opposite directions relative to each other;

[0034] The reverse rotation unit 24 includes an external gear ring 242 installed on the top plate 22 by bearings, and teeth are provided on both the inner and outer circles of the external gear ring 242. A driving gear 241 is engaged with the inner circle of the external gear ring 242. The driving gear 241 is adapted to rotate under external drive and drive the external gear ring 242 to rotate;

[0035] And a first driven gear 243 and a second driven gear 244 are respectively fixed to the ends of the two sets of fans 23 above the top plate 22. The first driven gear 243 is engaged with one side of the inner circle of the external gear ring 242 and is on the central cross-section of the external gear ring 242 with the driving gear 241. The second driven gear 244 is engaged with the outer circle of the external gear ring 242, and the second driven gear 244 is close to the driving gear 241;

[0036] Meanwhile, a top frame 211 is installed on the top plate 22, and a first motor 21 is fixed on the top frame 211. The output end of the first motor 21 is connected to the driving wheel 241, and the first motor 21 is adapted to drive the driving wheel 241 to rotate;

[0037] When the driving wheel 241 rotates, the driving wheel 241 drives the external gear ring 242 to rotate. Since the driving wheel 241 meshes with the inner ring of the external gear ring 242, the external gear ring 242 rotates in the same direction as the driving wheel 241. Under the rotation of the external gear ring 242, through the cooperation of the first driven wheel 243, the fan 23 under the first driven wheel 243 is driven to rotate. Since the first driven wheel 243 meshes with the inner ring of the external gear ring 242, the first driven wheel 243 rotates in the same direction as the external gear ring 242, so that the fan 23 on the right side of the top plate 22 rotates in the same direction as the driving wheel 241. At the same time, the second driven wheel 244 meshes with the outer ring of the external gear ring 242, so that the fan 23 on the left side of the top plate 22 rotates in the opposite direction to the driving wheel 241, so that the two groups of fans 23 rotate in opposite directions to each other;

[0038] For the convenience of description, it is hereby defined that the fan 23 on the left side of the top plate 22 inputs air, and the fan 23 on the right side of the top plate 22 discharges air. The air circulation direction generated by the two groups of fans 23 is as Figure 2 shown by the arrow direction in;

[0039] In summary, when ventilating the interior of the compartment 1, the first motor 21 operates, and under the action of the reversing unit 24, the two groups of fans 23 rotate in opposite directions to each other, so as to form a circulating air flow in the compartment 1;

[0040] Among them: the fan 23 on the left side of the top plate 22 inputs air into the compartment 1 and generates a downward air flow towards the bottom of the compartment 1. When the downward air flow reaches the bottom of the compartment 1, under the action of the bottom surface of the compartment 1, the air flow turns towards the right side of the compartment 1 and flows. At the same time, the fan 23 on the right side of the top plate 22 discharges air outwards, so as to form an upward air flow on the right side of the compartment 1. The upward air flow adsorbs the air flow at the bottom of the compartment 1 and discharges it towards the outside, so as to realize the full circulation of the air in all areas of the compartment 1;

[0041] As Figures 4 - 5 , a dust filtering mechanism 3 is installed at the bottom of the top plate 22 near the fan 23. The dust filtering mechanism 3 is used to filter the air flow output by the two groups of fans 23. The dust filtering mechanism 3 includes a filter screen 31 installed at the bottom of the fan 23, and a bottom frame 32 installed on the outer circle of the filter screen 31. A brush 33 is slidably installed on the bottom frame 32, and dust collecting boxes 331 are arranged on both sides of the brush 33. The dust collecting boxes 331 are used to collect dust debris. The brush 33 is adapted to slide along the bottom frame 32 under the action of an external force and brush the dust debris on the filter screen 31, and under the action of the dust collecting boxes 331 on both sides of the brush 33, the dust debris is collected;

[0042] And the bottom frame 32 extends out on both sides of the filter screen 31 to form a pending area for storing the brush 33.

[0043] At the same time, a screw rod 35 is installed on the bottom frame 32 by means of a bearing. The screw rod 35 penetrates through the brush 33 and is threadedly connected to the brush 33. Thus, when the screw rod 35 rotates, the brush 33 is adapted to move on the bottom frame 32. At the same time, a driving part 34 is arranged on the top side wall of the box body 1. The driving part 34 is used to drive the screw rod 35 to rotate. The driving part 34 is composed of a second motor 341 fixed on the top side wall of the box body 1 and a transmission unit 342 arranged between the output end of the second motor 341 and the end of the screw rod 35. The transmission unit 342 is a belt transmission structure in the prior art. The transmission unit 342 is composed of two sets of belt pulleys and a transmission belt wrapped around the two sets of belt pulleys. And the two sets of belt pulleys are respectively installed on the output end of the second motor 341 and the end of the screw rod 35.

[0044] When the box body 1 undergoes ventilation for a long time, due to the air circulation airflow formed in the box body 1 passing through the filter screen 31 repeatedly, when the airflow passes through the filter screen 31, the dust and debris in the airflow are left on it under the action of the filter screen 31. At this time, the dust and debris on the filter screen 31 are in a state of accumulation.

[0045] Then the second motor 341 rotates and drives the screw rod 35 to rotate with the cooperation of the transmission unit 342, so that the brush 33 moves on the bottom frame 32 and performs a brushing operation on the dust and debris on the filter screen 31, thereby achieving the purpose of preventing the dust and debris on the filter screen 31 from accumulating.

[0046] In summary, through the cooperation of the external tooth ring 242 with the first driven wheel 243 and the second driven wheel 244, the two sets of fans 23 rotate in opposite directions to each other, so as to form a circulating airflow in the box body 1. And under the action of the screw rod 35, the brush 33 is driven to perform a brushing operation on the filter screen 31, and the dust and debris are collected with the cooperation of the dust collecting box 331, thereby achieving the purpose of preventing the dust and debris on the filter screen 31 from accumulating, and achieving the effect of continuous air circulation inside the car and filtering the airflow.

[0047] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any several improvements and refinements within the spirit and principle of the present application and without departing from the principle of the present application should also be regarded as within the protection scope of the present application.

Claims

1. A ventilation device for an elevator car, Comprising: characterized in that: A box body (1); A ventilation component (2), which is installed on the box body (1), and the ventilation component (2) includes: A top plate (22), which is installed on the top of the box body (1), and two groups of fans (23) are installed on the top plate (22); A reverse unit (24), which is arranged on the top plate (22), and the reverse unit (24) has an outer gear ring (242) with a bearing installed on the top plate (22), and a first driven wheel (243) and a second driven wheel (244) respectively arranged on two groups of the fans (23). Both the inner and outer sides of the outer gear ring (242) are provided with teeth. The first driven wheel (243) meshes with the inner ring of the outer gear ring (242), and the second driven wheel (244) meshes with the outer ring of the outer gear ring (242); A dust filtering mechanism (3), which is arranged at the bottom of the top plate (22) near the fan (23). The dust filtering mechanism (3) has a filter screen (31) installed at the bottom of the fan (23), and a bottom frame (32) arranged on the outer circle of the filter screen (31). A brush (33) is slidably installed on the bottom frame (32); Wherein: the two groups of fans (23) are adapted to rotate relatively in opposite directions in cooperation with the outer gear ring (242), the first driven wheel (243) and the second driven wheel (244) to form a circulating air flow.

2. The ventilation device for an elevator car according to claim 1, characterized in that: The reverse unit (24) further includes a driving wheel (241) arranged inside the outer gear ring (242), and the driving wheel (241) meshes with the inner ring of the outer gear ring (242).

3. The ventilation device for an elevator car according to claim 2, characterized in that: The driving wheel (241) and the first driven wheel (243) are on the central cross-section of the outer gear ring (242).

4. The ventilation device for an elevator car according to claim 3, characterized in that: A top frame (211) is arranged on the top plate (22), and a first motor (21) is fixed on the top frame (211). The output end of the first motor (21) is connected to the driving wheel (241).

5. The ventilation device for an elevator car according to claim 4, characterized in that: Dust collecting boxes (331) for storing dust debris are arranged on both sides of the brush (33).

6. The ventilation device for an elevator car according to claim 5, characterized in that: A screw rod (35) is installed on the bottom frame (32) by a bearing, and the screw rod (35) is threadedly connected to the brush (33).

7. The ventilation device for an elevator car according to claim 6, characterized in that: A driving part (34) is arranged on the side wall of the top of the box body (1). The driving part (34) is composed of a second motor (341) installed on the side wall of the top of the box body (1), and a transmission unit (342) arranged between the second motor (341) and the end of the screw rod (35). The transmission unit (342) is a belt transmission structure.

8. The ventilation device for an elevator car according to claim 7, wherein: The transmission unit (342) is composed of two groups of belt pulleys and a transmission belt wrapped around the two groups of belt pulleys. The two groups of belt pulleys are respectively installed on the second motor (341) and the end of the screw rod (35).

9. The ventilation device for an elevator car according to claim 1, characterized in that: The bottom frame (32) extends out of both sides of the filter screen (31) to form a pending area for storing the brush (33).

10. The ventilation device for an elevator car according to claim 9, characterized in that: The bottom of the car body (1) is provided with guide rails (12), and two groups of car doors (11) are slidably installed on the guide rails (12). The car doors (11) are adapted to open and close the car body (1).

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