A device that uses the air pressure difference during elevator operation to exhaust and change air in the elevator car

Abstract

The present application relates to the technical field of ventilation equipment, and discloses a device for exhausting and exchanging air in an elevator car by utilizing the air pressure difference during elevator operation, so as to solve the problem that when the temperature is high, the amount of air discharged from the air outlet is fixed and it is difficult to automatically adjust the amount of air intake. By filling a liquid storage tank with expansion liquid, a slide cylinder and a connecting column are arranged at both ends of the liquid storage tank, a movable plate is fixedly connected to the top of the connecting column, an air inlet is formed between the liquid storage tank and the movable plate, and a filter device is fixedly installed on one side of the top of the liquid storage tank, and the filter device is connected to the air inlet; when the temperature is high, the temperature of the expansion liquid in the liquid storage tank rises, the expansion liquid expands, and pushes the connecting column and the movable plate upward, increasing the distance between the movable plate and the liquid storage tank, that is, increasing the size of the air inlet, thereby automatically adjusting the size of the air inlet, and under the same operating conditions, the amount of gas entering the elevator car through the air inlet increases, thereby adjusting the ventilation amount of the elevator car and ensuring the comfort inside the elevator car.

Description

Technical Field

[0001] The present application relates to the technical field of ventilation equipment, and in particular to a device for exhausting and exchanging air in an elevator car by utilizing the air pressure difference during elevator operation. Background Art

[0002] As a relatively closed space, the elevator car is prone to accumulate dirty air, odor and bacteria when there are many passengers and the car runs frequently, which has an adverse effect on the health of passengers and the riding experience. Therefore, exhaust and ventilation of the elevator car is an important part of ensuring the air quality in the car and improving the comfort of passengers.

[0003] Existing equipment utilizes the air pressure difference during elevator operation to exhaust and ventilate the elevator car. The air outlet of the exhaust and ventilating equipment is fixedly installed with the air inlet of the elevator car. When the elevator car is running, the higher air pressure outside the elevator car enters the elevator car through the air outlet of the exhaust and ventilating equipment. However, the air outlet of the exhaust and ventilating equipment is of fixed size. When the weather is hot, even if the temperature inside the car is high and a larger ventilation volume is required, the amount of gas entering from the air outlet of the exhaust and ventilating equipment is also fixed. It is difficult to automatically adjust the air intake according to the temperature inside the elevator car, and the adaptability is poor. Summary of the invention

[0004] The present application proposes a device for exhausting and exchanging air in an elevator car by utilizing the air pressure difference during elevator operation. The device has the advantage of automatically adjusting the size of the air outlet according to the temperature, and is used to solve the problem that when the temperature is high, the air intake volume of the air outlet is fixed and it is difficult to automatically adjust the air intake volume.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a device for exhausting and changing air in an elevator car by utilizing the air pressure difference of an elevator during operation, comprising a liquid storage tank and a filtering device, characterized in that: the liquid storage tank is filled with an expansion liquid, and the liquid storage tank is provided with: a slide tube, fixedly connected to both sides of the top of the liquid storage tank; a connecting column, a sliding seal is installed in the slide tube, and one end extends out of the slide tube; a limit ring, fixedly installed at the top of the inner wall of the slide tube; a support spring, movably sleeved on the outside of the connecting column, one end is fixedly connected to the limit ring, and the other end is fixedly connected to the connecting column; a movable plate, the two ends of the bottom are respectively fixedly connected to the tops of the two connecting columns; the gap between the liquid storage tank and the movable plate is the air outlet of the exhaust and air exchange device, a filtering device is fixedly installed at the top of one side of the liquid storage tank, the filtering device is connected to the air outlet of the air exchange device, a flexible sealing cloth is fixedly connected to the top of the movable plate, the upper end of the flexible sealing cloth is fixedly connected to the filtering device, and the two sides of the flexible sealing cloth are slidingly and sealingly connected to the filtering device; a redirecting device for changing the wind direction is connected to the slide tube.

[0006] Furthermore, the redirecting device includes: a rotating shaft, with both ends respectively inserted into slide cylinders and movably sealed with the slide cylinders; a redirecting plate, fixedly sleeved on the rotating shaft at a position between the two slide cylinders, one side of the redirecting plate being tightly attached to the end face of the liquid storage tank; two connecting springs, one end of which is fixedly connected to the end of the redirecting plate, and the other end of which is fixedly connected to the movable plate.

[0007] Furthermore, the filtering device includes: a shell, the bottom end of which is fixedly connected to the top of one side of the liquid storage tank; a baffle, which is fixedly connected to the two ends of the inner wall of the shell; a support bag, which is L-shaped and includes a horizontal bag and a vertical bag, the horizontal bag is fixedly installed on the baffle, and the vertical bag is installed on the two ends of the inner wall of the shell; a plurality of filter blocks, which are arranged side by side, and the two ends are fixedly installed on the horizontal bags of the support bags at both ends.

[0008] Furthermore, the filtering device is also provided with: a limiting arc groove, which is opened at the top of both ends of the shell; an elastic block, which is fixedly installed on the inner wall of the limiting arc groove away from the shell; a limiting rod, which is slidably installed in the limiting arc groove; an air inlet cylinder, the bottom end of which is slidably installed on the top of the inner wall of the shell, and the two sides are respectively fixedly connected to one end of the limiting rod close to the filter block.

[0009] Furthermore, the filtering device is also connected with: two connecting rods, one end of which is fixedly connected to the end of the air inlet cylinder and the other end is at the bottom end of the rotating shaft; a fixed block, which is fixedly installed on one side of the connecting rod at the bottom end of the rotating shaft; and insertion grooves arranged in a circular array are provided on the side walls at both ends of the rotating shaft, and the fixed block is used in conjunction with the insertion grooves.

[0010] Furthermore, a plurality of fixing grooves are equidistantly formed at both ends of the inner wall of the shell, and a clamping block is fixedly connected to the side wall of the connecting rod facing the fixing groove, and one end of the clamping block is clamped into the fixing groove.

[0011] Furthermore, dust shielding cloths are fixedly connected to both sides of the air inlet cylinder, and the other side of the dust shielding cloth is fixedly connected to the inner wall of the shell.

[0012] Furthermore, the axis center of the complete circular ring to which the limiting arc groove belongs is in the same straight line as the axis center of the rotating shaft; the fixing block is a wedge-shaped block, and the insertion groove is a wedge-shaped groove.

[0013] This application has the following beneficial effects:

[0014] 1. The present application provides a device for exhausting and exchanging air in an elevator car by utilizing the air pressure difference during elevator operation. When the temperature is high, the expansion liquid in the liquid storage tank absorbs heat and expands, pushing the connecting column and the movable plate upward, increasing the distance between the movable plate and the liquid storage tank, that is, increasing the size of the air inlet, thereby automatically adjusting the size of the air inlet. Under the same operating conditions, the amount of gas entering the elevator car through the air inlet increases, thereby adjusting the ventilation volume of the elevator car and ensuring the comfort inside the elevator car.

[0015] 2. The present application provides a device for exhausting and exchanging air in an elevator car by utilizing the air pressure difference during elevator operation. When the temperature is high, the movable plate drives the connecting spring and the redirecting plate to move, so that the redirecting plate is no longer close to the end face of the liquid storage tank. When the gas enters subsequently, the gas passing through the air inlet pushes the redirecting plate. Under the action of wind force and the elastic force of the connecting spring, the redirecting plate rotates back and forth around the rotating axis, changing the angle of the redirecting plate at the air inlet, thereby changing the angle at which the gas enters the elevator car, so that the gas inside the elevator car can flow in multiple directions, thereby increasing the fluidity of the gas inside the elevator car.

[0016] 3. The present application provides a device for exhausting and exchanging air in an elevator car by utilizing the air pressure difference during elevator operation. The gas enters the filter block for filtration through an air intake cylinder. When the filter block is blocked, the gas drives the redirecting plate and the rotating shaft to rotate, thereby causing the rotating shaft to drive the fixed block, the connecting rod and the air intake cylinder to move until the air intake cylinder moves to another filter block, thereby automatically completing the replacement of the filter block to prevent the filter block from being blocked and affecting the entry of external gas into the elevator car. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which constitute a part of the specification, illustrate the embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application.

[0018] The present application can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 2 A longitudinal cross-sectional view of the present invention from a middle position;

[0021] Figure 3 It is a partial structural schematic diagram of the present invention;

[0022] Figure 4 For the present invention Figure 3 A magnified view of the local structure at center A;

[0023] Figure 5 For the present invention Figure 3 Rear view of

[0024] Figure 6 It is a longitudinal sectional view of the present invention from the inside of one side of the air intake cylinder.

[0025] In the figure: 1, liquid storage tank; 101, slide cylinder; 102, connecting column; 2, moving plate; 3, flexible sealing cloth; 4, rotating shaft; 401, insertion slot; 5, redirecting plate; 6, connecting spring; 7, filtering device; 701, shell; 702, baffle; 703, filter block; 704, air intake cylinder; 705, supporting capsule; 706, fixing slot; 707, connecting rod; 708, fixing block; 709, limiting arc slot; 710, elastic block; 711, limiting rod; 712, clamping block. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. Example

[0027] See also Figure 1-Figure 4 , a device for exhausting and exchanging air in an elevator car by utilizing the air pressure difference during elevator operation, comprising a liquid storage tank 1 and a filtering device 7, see Figure 1 , Figure 3 and Figure 4 The top sides of the liquid storage tank 1 are fixedly connected with slide cylinders 101. The liquid storage tank 1 is filled with expansion liquid, which is a liquid with a large thermal expansion coefficient, such as Figure 4 In the embodiment, a connecting column 102 is installed with a sliding seal in the slide cylinder 101, and a limiting ring is fixedly installed on the top of the inner wall of the slide cylinder 101 to prevent the connecting column 102 from sliding out of the slide cylinder 101. A supporting spring is provided on the outer movable sleeve of the connecting column 102, one end of the supporting spring is fixedly connected to the limiting ring, and the other end of the supporting spring is fixedly connected to the connecting column 102. The top of the connecting column 102 extends out of the slide cylinder 101, and the tops of the two connecting columns 102 are fixedly connected with a movable plate 2, and the movable plate 2 is one, and the two ends of the bottom of the movable plate 2 are fixedly connected to the top of the connecting column 102. The gap between the liquid storage tank 1 and the movable plate 2 is the air outlet of the exhaust ventilation equipment, and the top of one side of the liquid storage tank 1 is fixedly installed with a filter device 7, and the filter device 7 is connected with the air outlet of the exhaust ventilation equipment. Please refer to Figure 3A flexible sealing cloth 3 is fixedly connected to the top of the movable plate 2, the upper end of the flexible sealing cloth 3 is fixedly connected to the filter device 7, and the two sides of the flexible sealing cloth 3 are slidingly and sealingly connected to the filter device 7, and the flexible sealing cloth 3 is used to close the gap between the filter device 7 and the movable plate 2 to prevent gas from being discharged from the gap between the filter device 7 and the movable plate 2; when the air temperature is higher than a certain temperature, the expansion liquid in the liquid storage tank 1 absorbs external heat to expand, and the expansion liquid enters the slide cylinder 101, pushing the sliding connection column 102 and the movable plate 2 to move, thereby increasing the distance between the liquid storage tank 1 and the movable plate 2, that is, increasing the size of the air outlet.

[0028] See also Figure 3 and Figure 4 The slide 101 is connected with a redirecting device for changing the wind direction, and the redirecting device includes a rotating shaft 4, a redirecting plate 5 and a connecting spring 6. The movable seals on the opposite side walls of the slide 101 are inserted into the rotating shaft 4, and the two ends of the rotating shaft 4 are respectively inserted into the slides 101 on both sides and penetrate the slide 101. The rotating shaft 4 is located on the outer wall between the two slides 101. A redirecting plate 5 is fixedly sleeved, and one side of the redirecting plate 5 is tightly attached to the end surface of the liquid storage tank 1. The two ends of the other side of the redirecting plate 5 are fixedly connected with the connecting spring 6, and the other end of the connecting spring 6 is fixedly connected to the moving plate 2. When the temperature is high, the movable plate 2 moves upward to increase the size of the air outlet, and the connecting spring 6 pulls the redirecting plate 5 and the rotating shaft 4 to rotate around the axis of the rotating shaft 4, so that the redirecting plate 5 is no longer close to the end face of the liquid storage tank 1. When the gas enters subsequently, the gas blows toward the redirecting plate 5 through the air outlet. Under the action of the pulling force of the connecting spring 6 and the thrust of the gas, the angle of the redirecting plate 5 toward the elevator car is cyclically changed, and the air entering the elevator car through the air outlet is passed into the elevator car from different directions, so that the gas inside the elevator car can flow in multiple directions.

[0029] See also Figure 5 and Figure 6The filter device 7 includes a shell 701, a baffle 702, a filter block 703, an air inlet cylinder 704 and a support capsule 705. The bottom end of the shell 701 is fixedly connected to the top of one side of the liquid storage tank 1. Two baffles 702 are fixedly connected to the inner wall of the shell 701, and the two baffles 702 are respectively located at the two ends of the shell 701. An L-shaped support capsule 705 is fixedly installed on the baffle 702. The support capsule 705 includes a horizontal capsule and a vertical capsule. The horizontal capsule is fixedly installed on the baffle 702, and the vertical capsule is installed on the inner wall of the shell 701. A plurality of filter blocks 703 arranged side by side are fixedly installed on the horizontal capsule. The tops of the two ends of the shell 701 are provided with limited arc grooves 709. , an elastic block 710 is fixedly installed on the inner side wall of the limiting arc groove 709 away from the shell 701, a limiting rod 711 is slidably installed in the limiting arc groove 709, and one end of the limiting rod 711 close to the filter block 703 is fixedly connected to the air inlet cylinder 704, and the bottom end of the air inlet cylinder 704 is slidably installed on the top of the inner wall of the shell 701. The air inlet cylinder 704 is made of a material with a lower density, such as foam, aerogel, etc., and the two ends of the air inlet cylinder 704 are fixedly connected with a connecting rod 707, and the connecting rod 707 is n-shaped, and one end of the connecting rod 707 is fixedly connected to the side wall of the air inlet cylinder 704, and the other end of the connecting rod 707 is at the bottom end of the rotating shaft 4, please refer to Figure 4 , a fixing block 708 is fixedly installed on the side wall of the rotating shaft 4 at the other end of the connecting rod 707, and insertion grooves 401 arranged in a ring array are opened on the side walls at both ends of the rotating shaft 4, and the fixing block 708 is used in conjunction with the insertion groove 401, and the fixing block 708 can be inserted into the insertion groove 401; when the filter block 703 at the lower end of the air intake cylinder 704 is blocked, the gas with higher air pressure above squeezes the filter block 703, so that the filter block 703 moves into the shell 701, at this time, the two ends of the filter block 703 squeeze the horizontal bag of the support bag 705, and the gas in the horizontal bag of the support bag 705 enters the vertical bag of the support bag 705, so that the vertical bag of the support bag 705 expands, and the expanded vertical bag of the support bag 705 pushes the air intake cylinder 704 at the upper end of the vertical bag to move upward, and at the same time The connecting rod 707 and the block 712 are driven to move upward, and the limit of the block 712 by the fixed groove 706 is released. The upward moving connecting rod 707 drives the fixed block 708 to move upward, and the upward moving fixed block 708 is stuck in the insertion groove 401 of the rotating shaft 4. After the air intake cylinder 704 moves upward, the gas entering from the air intake cylinder 704 can pass through other filter blocks 703 to enter the air inlet, and the gas entering through the air inlet pushes the redirecting plate 5 and the rotating shaft 4 to reciprocate. The rotation of the rotating shaft 4 drives the insertion groove 401 to drive the fixed block 708, the connecting rod 707 and the air intake cylinder 704 to rotate, thereby changing the position of the air intake cylinder 704, so that the air intake cylinder 704 is connected with another filter block 703, thereby automatically completing the replacement of the filter block 703.

[0030] See also Figure 5A plurality of fixing grooves 706 are equidistantly provided on both ends of the inner wall of the shell 701, and a clamping block 712 is fixedly connected to the side wall of the connecting rod 707 facing the fixing groove 706. One end of the clamping block 712 is inserted into the fixing groove 706. The clamping block 712 limits the air intake cylinder 704 to prevent the air intake cylinder 704 from sliding in the shell 701.

[0031] See also Figure 2 Dust shielding cloths are fixedly connected to both sides of the air inlet cylinder 704, and the other side of the dust shielding cloths are fixedly connected to the inner wall of the shell 701 to prevent dust and gas from entering the air outlet of the exhaust ventilation equipment through the filter blocks 703 on both sides of the air inlet cylinder 704.

[0032] The center of the complete circle to which the limiting arc groove 709 belongs is in the same straight line as the axis of the rotating shaft 4. When the insertion groove 401 of the rotating shaft 4 drives the fixing block 708, the connecting rod 707 and the air inlet cylinder 704 to rotate, it is ensured that the limiting rod 711 on the air inlet cylinder 704 can slide in the limiting arc groove 709, and the limiting arc groove 709 is prevented from hindering the limiting rod 711 and the air inlet cylinder 704 from moving.

[0033] The fixed block 708 is a wedge-shaped block, and the insertion groove 401 is a wedge-shaped groove. When the fixed block 708 is inserted into the insertion groove 401, when the redirecting plate 5 drives the rotating shaft 4 to rotate toward the moving plate 2, the insertion groove 401 of the rotating rotating shaft 4 can drive the fixed block 708, the connecting rod 707 and the air inlet cylinder 704 to rotate, thereby changing the position of the air inlet cylinder 704; when the redirecting plate 5 drives the rotating shaft 4 to rotate in a direction away from the moving plate 2, the inclined surface of the insertion groove 401 and the inclined surface of the fixed block 708 slide against each other, and the insertion groove 401 cannot drive the fixed block 708, the connecting rod 707 and the air inlet cylinder 704 to rotate.

[0034] The working principle of the present invention is as follows:

[0035] Before using the exhaust ventilation equipment, a set of mirror-image exhaust ventilation equipment needs to be fixedly installed on the elevator car, and the air outlet of the exhaust ventilation equipment is connected to the air inlet of the elevator car.

[0036] See also Figure 1-Figure 3When the air temperature is higher than a certain temperature, the expansion liquid in the liquid storage tank 1 absorbs external heat, and the temperature of the expansion liquid in the liquid storage tank 1 increases. Due to the thermal expansion of the expansion liquid, the volume of the expansion liquid in the liquid storage tank 1 increases, and the expansion liquid with an increased volume enters the slide 101, thereby pushing the connecting column 102 in the slide 101 to move toward the outside of the slide 101, and the moving connecting column 102 pushes the moving plate 2 to move in the same direction, thereby increasing the distance between the liquid storage tank 1 and the moving plate 2, that is, increasing the size of the air outlet. When the temperature is high, under the same operating environment, due to the increase in the size of the air outlet, the amount of gas in the hoistway entering the elevator car from the filter device 7 and the air outlet increases. When the temperature is high, the ventilation volume entering the elevator car is adjusted to ensure the comfort inside the elevator car.

[0037] See also Figure 1-Figure 6 When the temperature is high, the expansion fluid in the liquid storage tank 1 expands, pushing the connecting column 102 and the movable plate 2 to move to the side away from the liquid storage tank 1. In this process, the movable plate 2 drives one end of the connecting spring 6 to move, and the other end of the connecting spring 6 pulls the redirecting plate 5 and the rotating shaft 4 to rotate around the axis of the rotating shaft 4, so that the redirecting plate 5 is no longer close to the end surface of the liquid storage tank 1; when the elevator car drives the exhaust ventilation equipment upward, the elevator car squeezes the gas in the well above the elevator car, and the gas pressure above the elevator car is higher than the air pressure in the elevator car. At this time, the relatively high-pressure gas entering from the upper filter device 7 enters through the air outlet When the gas with relatively high pressure enters the elevator car, it blows toward the redirecting plate 5 through the air outlet. The force of the gas pushes the redirecting plate 5 and the rotating shaft 4 to rotate, so that the redirecting plate 5 stretches the connecting spring 6. Under the action of the tension of the connecting spring 6, the connecting spring 6 pulls the redirecting plate 5 to rotate in the opposite direction, so that the upper redirecting plate 5 rotates cyclically around the axis of the rotating shaft 4, changing the angle of the redirecting plate 5 toward the elevator car, and passing the air entering the elevator car through the air outlet into the elevator car through different directions, so that the gas inside the elevator car can flow in multiple directions, thereby further increasing the fluidity of the gas inside the elevator car.

[0038] See also Figure 1-Figure 6When the temperature is high, the expansion fluid in the liquid storage tank 1 expands, pushing the connecting column 102 and the moving plate 2 to move to the side away from the liquid storage tank 1, thereby increasing the size of the air outlet. In the same period of use, the amount of gas entering the air outlet from the air intake cylinder 704 and the filter block 703 increases, and it is difficult to determine the replacement time of the filter block; when the elevator car goes up, the filter block 703 at the lower end of the air intake cylinder 704 filters a large amount of air and causes blockage, and the gas with higher air pressure above wants to pass through the air intake cylinder 704 and filter block 703 enter the air outlet. Since filter block 703 is blocked, the force of air pressure acts on filter block 703, so that the higher air pressure squeezes filter block 703 and moves filter block 703 into housing 701. At this time, both ends of filter block 703 squeeze the horizontal bag of support bag 705, and the gas in the horizontal bag of support bag 705 enters the vertical bag of support bag 705, so that the vertical bag of support bag 705 expands. The expanded vertical bag of support bag 705 pushes the air inlet at the upper end of the vertical bag. The cylinder 704 moves upward, so that the air intake cylinder 704 drives the connecting rod 707 and the block 712 to move upward, and the limit of the block 712 on the fixed groove 706 is released. At the same time, the upward connecting rod 707 drives the fixed block 708 to move upward, and the upward fixed block 708 is stuck in the insertion groove 401 of the rotating shaft 4. After the air intake cylinder 704 moves upward, the gas entering from the air intake cylinder 704 can pass through other filter blocks 703 to enter the air inlet, so that the gas enters the car through the air inlet. At this time, the air inlet The incoming gas pushes the redirecting plate 5 and the rotating shaft 4 to rotate back and forth. During this process, when the redirecting plate 5 and the rotating shaft 4 rotate toward the moving plate 2, the insertion slot 401 of the rotating rotating shaft 4 can drive the fixed block 708, the connecting rod 707 and the air inlet cylinder 704 to rotate, thereby changing the position of the air inlet cylinder 704 and connecting the air inlet cylinder 704 with another filter block 703, thereby automatically completing the replacement of the filter block 703 and preventing the filter block 703 from being blocked and affecting the entry of external gas into the elevator car.

Claims

1. A device for exhausting and exchanging air in an elevator car by utilizing the air pressure difference during elevator operation, comprising a liquid storage tank (1) and a filtering device (7), characterized in that: The liquid storage tank (1) is filled with expansion liquid, and the liquid storage tank (1) is provided with: A slide cylinder (101) is fixedly connected to two sides of the top end of the liquid storage tank (1); A connecting column (102) is slidingly and sealably mounted in the slide cylinder (101), with one end extending out of the slide cylinder (101); A limiting ring, fixedly mounted on the top end of the inner wall of the slide cylinder (101); A support spring, movably sleeved on the outside of the connecting column (102), one end of which is fixedly connected to the limiting ring, and the other end of which is fixedly connected to the connecting column (102); The movable plate (2) has two ends of its bottom fixedly connected to the top ends of the two connecting pillars (102); The gap between the liquid storage tank (1) and the movable plate (2) is the air outlet of the exhaust ventilation device; a filter device (7) is fixedly mounted on the top of one side of the liquid storage tank (1); the filter device (7) is in communication with the air outlet of the ventilation device; a flexible sealing cloth (3) is fixedly connected to the top of the movable plate (2); the upper end of the flexible sealing cloth (3) is fixedly connected to the filter device (7); and both sides of the flexible sealing cloth (3) are slidably sealed and connected to the filter device (7); The slide cylinder (101) is connected with a redirecting device for changing the wind direction.

2. The device for exhausting and exchanging air in an elevator car by utilizing the air pressure difference during elevator operation according to claim 1, characterized in that: The redirecting device comprises: The rotating shaft (4) has two ends respectively inserted into the slide cylinder (101) and is movably sealed with the slide cylinder (101); A redirecting plate (5) is fixedly sleeved on the rotating shaft (4) at a position between the two slide cylinders (101), and one side of the redirecting plate (5) is in close contact with an end surface of the liquid storage tank (1); Two connecting springs (6) have one end fixedly connected to the end of the redirecting plate (5) and the other end fixedly connected to the moving plate (2).

3. The device for exhausting and exchanging air in an elevator car by utilizing the air pressure difference during elevator operation according to claim 2, characterized in that: The filtering device (7) comprises: A shell (701), the bottom end of which is fixedly connected to the top end of one side of the liquid storage tank (1); The baffle (702) is fixedly connected to two ends of the inner wall of the shell (701); The support bag (705) is L-shaped and comprises a horizontal bag and a vertical bag, wherein the horizontal bag is fixedly mounted on the baffle (702) and the vertical bag is mounted on both ends of the inner wall of the shell (701); A plurality of filter blocks (703) are arranged side by side, and both ends are fixedly mounted on the support bags (705) at both ends.

4. The device for exhausting and exchanging air in an elevator car by utilizing the air pressure difference during elevator operation according to claim 3, characterized in that: The filtering device (7) is also provided with: Limiting arc grooves (709) are formed at the tops of both ends of the housing (701); The elastic block (710) is fixedly mounted on the inner side wall of the limiting arc groove (709) away from the housing (701); A limiting rod (711) is slidably mounted in the limiting arc groove (709); The air inlet cylinder (704) has a bottom end slidably mounted on the top end of the inner wall of the housing (701), and two sides thereof are respectively fixedly connected to one end of the limiting rod (711) close to the filter block (703).

5. The device for exhausting and exchanging air in an elevator car by utilizing the air pressure difference during elevator operation according to claim 4, characterized in that: The filtering device (7) is also connected with: Two connecting rods (707), one end of which is fixedly connected to the end of the air inlet cylinder (704) and the other end of which is located at the bottom end of the rotating shaft (4); A fixed block (708) is fixedly mounted on one side of the connecting rod (707) at the bottom end of the rotating shaft (4); Insertion slots (401) arranged in a ring array are provided on the side walls at both ends of the rotating shaft (4), and the fixing blocks (708) are used in conjunction with the insertion slots (401).

6. The device for exhausting and exchanging air in an elevator car by utilizing the air pressure difference during elevator operation according to claim 5, characterized in that: A plurality of fixing grooves (706) are equidistantly provided at both ends of the inner wall of the housing (701); a clamping block (712) is fixedly connected to the side wall of the connecting rod (707) facing the fixing groove (706); one end of the clamping block (712) is clamped into the fixing groove (706).

7. The device for exhausting and exchanging air in an elevator car by utilizing the air pressure difference during elevator operation according to claim 5, characterized in that: Dust shielding cloths are fixedly connected to both sides of the air inlet cylinder (704), and the other side of the dust shielding cloth is fixedly connected to the inner wall of the shell (701).

8. The device for exhausting and exchanging air in an elevator car by utilizing the air pressure difference during elevator operation according to claim 5, characterized in that: The axis center of the complete circular ring to which the limiting arc groove (709) belongs is in the same straight line as the axis center of the rotating shaft (4); the fixing block (708) is a wedge-shaped block, and the insertion groove (401) is a wedge-shaped groove.

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