Ventilation fresh air device for elevator

Abstract

The ventilation fresh air device comprises a first shell arranged at the top of an inner car and second shells arranged at the lower ends of the left side face and the right side face of the inner car, a first shielding part is arranged in the first shell, and a second shielding part is arranged in the second shell. When the elevator ascends, air in the hoistway can enter the inner car through the ascending air inlet pipe under the action of the positive pressure at the top of the car and is exhausted through the ascending air outlet pipe, and when the elevator descends, the air in the hoistway can enter the top of the inner car through the descending air inlet pipe under the action of the positive pressure at the bottom of the car and is exhausted from the bottom of the inner car through the descending air outlet pipe. A good ventilation effect is achieved when the elevator car ascends or descends, and the ventilation and purification capacity in the elevator car is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ventilation equipment, and in particular to a ventilation and fresh air device for elevators. Background Art

[0002] In order to improve the comfort of riding in an elevator, the elevator car is generally equipped with air ventilation equipment; the air flow inside the elevator shaft is used to ventilate the interior of the elevator car. When an ultra-high-speed elevator moves upward in the shaft, the air at the top of the elevator car is sharply compressed to form a relative positive pressure at the top of the car, and at the same time, a relatively low pressure is formed at the bottom of the car; conversely, when the elevator moves downward in the shaft, the air at the bottom of the elevator car is sharply compressed to form a relative positive pressure at the bottom of the car, and at the same time, a relatively low pressure is formed at the top of the car. Because its principle is similar to the flow caused by the movement of the piston compressing the air in the cylinder, it is called the shaft piston effect.

[0003] In addition, elevators are closed, small, and crowded. The relatively closed space and poor ventilation result in a large amount of pollutants remaining in the elevator space. Once pathogenic droplet aerosol particles are present, the elevator will be a high-risk public place for virus infection. Experiments have shown that the optimal ventilation method is the ventilation method in which the two air supply vents are distributed along the three-dividing line of the car ceiling and the exhaust vents are respectively set in the middle of the bottom of the left and right walls. The air supply airflow is sent in from the middle of the top, and the downward airflow has a significant control effect on the movement of aerosol particles in the entire space. Most aerosol particles are transported to the exhaust vents for discharge. Compared with other ventilation methods, the risk of virus aerosol particle transmission and virus contact infection is lower than other ventilation methods, and the ventilation and purification capacity is ideal.

[0004] The existing elevator car air supply methods are mostly to set a fan at the air inlet position on the top of the car, or directly use the positive and negative pressure when the car is running to force the air in the shaft into the car through the air inlet. However, no matter which ventilation method is used, it only has a good air supply effect when the elevator car is ascending. When the elevator runs downward in the shaft, there is a certain negative pressure on the top of the car, and it is difficult for the shaft air to enter the car through the air inlet on the top of the car. At this time, the ventilation effect of fresh air is poor, which is not conducive to the discharge of dirty air in the car. Summary of the invention

[0005] In view of the above problems, the present invention provides a ventilation and fresh air device for an elevator, which achieves a good ventilation effect for the elevator car when going up or down, and improves the ventilation and purification capacity inside the car.

[0006] The specific technical solutions are as follows: A ventilation and fresh air device for an elevator, comprising: A first shell body is disposed on the top of the inner compartment and communicated with the inner compartment, wherein an upward air inlet pipe, a downward air inlet pipe, an upward positive pressure first cylinder body and a downward positive pressure first cylinder body are communicated with each other on the first shell body, wherein the other ends of the upward air inlet pipe and the upward positive pressure first cylinder body are vertically arranged upward, and the other end of the downward air inlet pipe is vertically arranged downward, and the other end of the downward positive pressure first cylinder body is communicated with the downward air inlet pipe; The first shielding component arranged inside the first shell includes a first left-right swinging assembly driving the first shield to move leftward or rightward, a first positive pressure pushing assembly arranged inside the first upward positive pressure cylinder and moving the first shield to shield the downward air inlet duct port when the elevator is moving upward, and a second positive pressure pushing assembly arranged inside the first downward positive pressure cylinder and moving the first shield to shield the upward air inlet duct port when the elevator is moving downward; A second shell body is provided at the lower ends of the left and right sides of the inner compartment and is connected to the inner compartment, wherein an upward air outlet pipe, a downward air outlet pipe, an upward positive pressure second cylinder body and a downward positive pressure second cylinder body are connected to the second shell body, the other ends of the upward air outlet pipe and the downward positive pressure second cylinder body are vertically downwardly arranged, the other end of the downward air outlet pipe is vertically upwardly arranged, and the other end of the upward positive pressure second cylinder body is connected to the downward air outlet pipe; The second shielding component arranged inside the second shell includes a second left-right swinging component that drives the second shield to move left or right, a third positive pressure pushing component that is arranged inside the second upward positive pressure cylinder and moves the second shield to shield the downward air outlet port when the elevator is ascending, and a fourth positive pressure pushing component that is arranged inside the second downward positive pressure cylinder and moves the second shield to shield the upward air outlet port when the elevator is descending.

[0007] Furthermore, a first filter screen is horizontally arranged inside the first shell.

[0008] Furthermore, a second filter is provided at a position where the second shell communicates with the inner compartment.

[0009] Furthermore, an outer compartment is provided outside the inner compartment, and a chamber is enclosed between the outer wall of the inner compartment and the inner wall of the outer compartment, and the upward air inlet duct, the downward air inlet duct, the upward positive-pressure first cylinder body, the downward positive-pressure first cylinder body and the upward air outlet duct, the downward air outlet duct, the upward positive-pressure second cylinder body, and the downward positive-pressure second cylinder body are all located inside the chamber, and one end of the upward air inlet duct and the upward positive-pressure first cylinder body away from the first shell body passes through the upper end surface of the outer compartment to extend to the outside, one end of the downward air inlet duct away from the first shell body passes through the lower end surface of the outer compartment to extend to the outside, one end of the upward air outlet duct and the downward positive-pressure second cylinder body away from the second shell body passes through the lower end surface of the outer compartment to extend to the outside, and one end of the downward air outlet duct away from the second shell body passes through the upper end surface of the outer compartment to extend to the outside.

[0010] Furthermore, the first left-right swing assembly includes a first swing block, the length direction of the first swing block is horizontally arranged in the left-right direction, a first hinge seat is symmetrically arranged in the middle of the front and rear side surfaces of the first swing block, the first hinge seat is adapted to have a first hinge head, the other end of the first hinge head is coaxially arranged with a first movable rod, the other end of the first movable rod is sleeved inside the first sleeve, the other end of the first sleeve is coaxially arranged with a second hinge head, the other end of the second hinge head is adapted to have a second hinge seat, the other end of the second hinge seat is connected to the front and rear inner walls of the first shell through a first support plate, a first return spring is also arranged between the first hinge head and the second hinge head, the length direction of the first baffle is arranged along the length direction of the first shell and the upper end surface of the first baffle is in contact with the upper end surface inside the first shell, and the middle part of the lower end of the first baffle is connected to the middle part of the upper end of the first swing block.

[0011] Furthermore, the upward positive-pressure first cylinder is L-shaped and is horizontally arranged at one end close to the first shell body, and the first positive-pressure pushing assembly includes a first piston block adapted to the horizontal section of the upward positive-pressure first cylinder body, and the first piston block is coaxially provided with a first pushing support rod on an end face close to the first shell body, and the other end of the first pushing support rod extends to the outside of the upward positive-pressure first cylinder body and is provided with a first pushing head for pushing one end portion of the first swinging block, and the part of the first pushing support rod located inside the upward positive-pressure first cylinder body is sleeved with a third return spring.

[0012] Furthermore, the axial direction of the downward positive-pressure first cylinder is horizontally arranged in the left-right direction, and the second positive-pressure pushing assembly includes a second piston block adapted to the downward positive-pressure first cylinder, and the second piston block is coaxially provided with a second pushing support rod close to an end face of the first shell, and the other end of the second pushing support rod extends to the outside of the downward positive-pressure first cylinder and is provided with a second pushing head for pushing the other end of the first swing block, and the part of the second pushing support rod located inside the downward positive-pressure first cylinder is sleeved with a fourth return spring.

[0013] Furthermore, the upward positive-pressure first cylinder and the downward positive-pressure first cylinder are respectively located on both sides of the first shell in the left-right direction.

[0014] Furthermore, the second left-right swing assembly includes a second swing block, the length direction of the second swing block is horizontally arranged in the left-right direction, a third hinge seat is symmetrically arranged in the middle of the front and rear side surfaces of the second swing block, a third hinge head is adapted on the third hinge seat, the other end of the third hinge head is coaxially arranged with a second movable rod, the other end of the second movable rod is sleeved inside the second sleeve, a fourth hinge head is coaxially arranged on the other end of the second sleeve, the other end of the fourth hinge head is adapted with a fourth hinge seat, the other end of the fourth hinge seat is connected to the front and rear inner walls of the second shell through a second support plate, a second return spring is also arranged between the third hinge head and the fourth hinge head, the length direction of the second baffle is arranged along the length direction of the second shell and the lower end surface of the second baffle is in contact with the lower end surface inside the second shell, and the middle part of the upper end of the second baffle is connected to the middle part of the lower end of the second swing block.

[0015] Furthermore, the axial direction of the upward positive-pressure second cylinder is horizontally arranged in the left-right direction, and the third positive-pressure pushing assembly includes a third piston block adapted to the upward positive-pressure second cylinder, and the third piston block is coaxially provided with a third pushing support rod close to an end face of the second shell, the other end of the third pushing support rod extends to the outside of the upward positive-pressure second cylinder and is provided with a third pushing head for pushing one end portion of the second swing block, and the part of the third pushing support rod located inside the upward positive-pressure second cylinder is sleeved with a fifth return spring.

[0016] Furthermore, the downward positive-pressure second cylinder is in an inverted L-shape and is horizontally arranged at one end close to the second shell body, and the fourth positive-pressure pushing assembly includes a fourth piston block adapted to the horizontal section of the downward positive-pressure second cylinder body, and a fourth pushing support rod is coaxially arranged on an end face of the fourth piston block close to the second shell body, and the other end of the fourth pushing support rod extends to the outside of the downward positive-pressure second cylinder body and is provided with a fourth pushing head for pushing the other end of the second swinging block, and the part of the fourth pushing support rod located inside the downward positive-pressure second cylinder body is sleeved with a sixth return spring.

[0017] Furthermore, the upward positive-pressure second cylinder body and the downward positive-pressure second cylinder body are respectively located on both sides of the second shell in the left-right direction.

[0018] Furthermore, the upward air inlet pipe, the downward air inlet pipe, the upward positive pressure first cylinder body, the downward positive pressure first cylinder body, the upward air outlet pipe, the downward air outlet pipe, the upward positive pressure second cylinder body, and the downward positive pressure second cylinder body are respectively provided with a plurality of the upward air inlet pipes, the downward air inlet pipes, the upward positive pressure first cylinder body, the downward positive pressure first cylinder body, the upward air outlet pipe, the downward air outlet pipe, the upward positive pressure second cylinder body, and the downward positive pressure second cylinder body are respectively arranged in sequence along the front-to-back direction, and the ends of the plurality of first push rods away from the first piston block are connected by the first push total rod The first push head is connected to the first pushing main rod, one end of several second pushing support rods away from the second piston block is connected through the second pushing main rod, the second push head is connected to the second pushing main rod, one end of several third pushing support rods away from the third piston block is connected through the third pushing main rod, the third push head is connected to the third pushing main rod, one end of several fourth pushing support rods away from the fourth piston block is connected through the fourth pushing main rod, and the fourth push head is connected to the fourth pushing main rod.

[0019] Furthermore, the length directions of the first shell and the second shell are both horizontally arranged along the front-to-back direction, and two of the first shell and the second shell are respectively provided. The two first shells are distributed along the left-right trisection line of the upper end surface of the inner compartment, and the two second shells are respectively arranged in the middle position of the bottom of the left and right side surfaces of the inner compartment.

[0020] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention provides a ventilation and fresh air device for an elevator. When the elevator is ascending, the air in the hoistway can enter the inner car through the upward air inlet duct and be discharged through the upward air outlet duct due to the positive pressure at the top of the car. When the elevator is descending, the air in the hoistway can enter the top of the inner car through the downward air inlet duct and be discharged from the bottom of the inner car through the downward air outlet duct due to the positive pressure at the bottom of the car. This ensures that the elevator car has a good ventilation effect when ascending or descending, thereby improving the ventilation and purification capacity of the interior of the car.

[0021] (2) The present invention provides a ventilation and fresh air device for an elevator, which generally adopts the optimal ventilation method, that is, two first shells are distributed along the left and right trisection lines of the upper end surface of the inner car, and two second shells are respectively arranged at the middle position of the bottom of the left and right side surfaces of the inner car, and no matter whether the elevator is going up or down, the air in the hoistway can enter the inner car through the first shell and be discharged from the second shell, so that the elevator car can maintain the optimal ventilation and purification capacity when going up or down.

[0022] (3) The present invention provides a ventilation device for an elevator, wherein the driving sources of the first shielding component and the second shielding component are all derived from the positive pressure generated when the elevator car goes up or down, thereby ensuring that the elevator car has a good ventilation effect when going up or down, and does not require additional external power supply and control components. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] Figure 2 It is a schematic diagram of the first shell structure of the present invention.

[0025] Figure 3 It is a schematic diagram of the second shell structure of the present invention.

[0026] Figure 4 The present invention Figure 3 Schematic diagram of the cross-sectional view at AA.

[0027] Figure 5 The present invention Figure 4 A partial enlarged schematic diagram of point B.

[0028] Figure 6 The present invention Figure 4 A partial enlarged schematic diagram of point C.

[0029] Figure 7 The present invention Figure 4 A partial enlarged schematic diagram of point D.

[0030] Figure 8 It is a schematic structural diagram of the first shielding component of the present invention.

[0031] Fig. 9 The present invention Figure 8 A partial enlarged schematic diagram of point E.

[0032] Fig.10 The present invention Figure 8 A partial enlarged schematic diagram of point F.

[0033] Fig.11 The present invention Figure 8 A local enlarged schematic diagram of point G.

[0034] Fig.12 It is a schematic diagram of the structure of the driving component of the present invention.

[0035] Fig.13 It is a schematic diagram of the cleaning component structure of the present invention.

[0036] Fig.14 The present invention Fig.12 A local enlarged schematic diagram of point H.

[0037] In the figure: 1, inner compartment; 2, outer compartment; 3, chamber; 6, first shell; 61, upward air inlet pipe; 62, downward air inlet pipe; 63, upward positive pressure first cylinder; 64, downward positive pressure first cylinder; 7, second shell; 71, upward air outlet pipe; 72, downward air outlet pipe; 73, upward positive pressure second cylinder; 74, downward positive pressure second cylinder; 81, first left and right swing assembly; 811, first swing block; 82, first baffle; 83, first positive pressure push assembly; 831, first piston block; 832, first push support rod; 833, first push main rod; 834, first push head; 835, third return spring; 84, second positive pressure push assembly; 841, second piston block; 842, second push support rod; 843, second push main rod; 845, fourth return spring; 851, third housing; 852, first screw rod; 853, first thread; 854, second thread; 855, first ball nut slider; 856, second ball nut slider; 857, first connecting rod; 858, first guide rod; 86, second stroke amplification assembly; 91, second left-right swing assembly; 911, second swing block ; 912, third hinge seat; 913, second movable rod; 914, second sleeve; 915, fourth hinge seat; 916, second return spring; 92, second baffle; 93, third positive pressure push assembly; 931, third piston block; 932, third push support rod; 933, third push total rod; 935, fifth return spring; 94, fourth positive pressure push assembly; 941, fourth piston block; 942, fourth push support rod; 943, fourth push total rod; 945, sixth return spring; 95, third stroke amplification assembly; 96, fourth stroke amplification Assembly; 10, first filter; 11, second filter; 12, cleaning assembly; 121, movable plate; 122, cleaning surface; 123, rectangular opening; 124, fifth connecting rod; 125, fifth screw rod; 126, ninth ball nut slider; 127, fifth guide rod; 128, gear; 131, drive seat; 132, fifth piston block; 133, first through hole; 134, intake pipe; 135, solenoid valve; 136, second through hole; 137, drive rod; 138, U-shaped through hole; 139, seventh return spring; 1310, rack. DETAILED DESCRIPTION

[0038] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0039] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] Embodiment 1: The present invention provides a ventilation and fresh air device for an elevator, referring to Figure 1 and Figure 2 , including a first shell 6 arranged at the top of the inner compartment 1 and connected to the inner compartment 1, the first shell 6 is connected with an upward air inlet duct 61, a downward air inlet duct 62, an upward positive-pressure first cylinder 63 and a downward positive-pressure first cylinder 64, the other ends of the upward air inlet duct 61 and the upward positive-pressure first cylinder 63 are vertically arranged upward, the other end of the downward air inlet duct 62 is vertically arranged downward, and the other end of the downward positive-pressure first cylinder 64 is connected to the downward air inlet duct 62; the upward positive-pressure first cylinder 63 and the downward positive-pressure first cylinder 64 are respectively located on both sides of the left and right directions of the first shell 6.

[0041] refer to Figure 1 and Figure 3 , and also includes a second shell 7 arranged at the lower ends of the left and right sides of the inner compartment 1 and connected to the inner compartment 1, the second shell 7 is connected with an upward air outlet duct 71, a downward air outlet duct 72, an upward positive-pressure second cylinder 73 and a downward positive-pressure second cylinder 74, the other ends of the upward air outlet duct 71 and the downward positive-pressure second cylinder 74 are vertically arranged downward, the other end of the downward air outlet duct 72 is vertically arranged upward, the other end of the upward positive-pressure second cylinder 73 is connected with the downward air outlet duct 72; the upward positive-pressure second cylinder 73 and the downward positive-pressure second cylinder 74 are respectively located on both sides of the left and right directions of the second shell 7. When the ultra-high-speed elevator moves upward in the hoistway, the air at the top of the elevator car encounters rapid compression to form a relative positive pressure at the top of the car, and at the same time, a relatively low pressure is formed at the bottom of the car; on the contrary, when the elevator moves downward in the hoistway, the air at the bottom of the elevator car encounters rapid compression to form a relative positive pressure at the bottom of the car, and at the same time, a relatively low pressure is formed at the top of the car. Therefore, when the elevator goes up, the air in the hoistway can enter the inner car through the upward air inlet duct 61 and be discharged through the upward air outlet duct 71 due to the positive pressure at the top of the car; when the elevator goes down, the air in the hoistway can enter the top of the inner car 1 through the downward air inlet duct 62 and be discharged from the bottom of the inner car 1 through the downward air outlet duct 72 due to the positive pressure at the bottom of the car, thereby achieving a good ventilation effect for the elevator car when going up or down, and improving the ventilation and purification capacity inside the car.

[0042] Further, as an implementation method, refer to Figure 3 and Figure 4, and also includes a second shielding component arranged inside the second shell 7, including a second left-right swinging component 91 that drives the second shielding plate 92 to move left or right, a third positive pressure pushing component 93 arranged inside the second upward positive pressure cylinder 73 and moving the second shielding plate 92 to shield the port of the downward air outlet duct 72 when the elevator is ascending, and a fourth positive pressure pushing component 94 arranged inside the second downward positive pressure cylinder 74 and moving the second shielding plate 92 to shield the port of the upward air outlet duct 71 when the elevator is descending.

[0043] Further, as a specific implementation method, refer to Figure 4 and Figure 5 The second left-right swing assembly 91 includes a second swing block 911, the length direction of the second swing block 911 is horizontally arranged in the left-right direction, and a third hinge seat 912 is symmetrically arranged in the middle of the front and rear side surfaces of the second swing block 911, and a third hinge head is adapted on the third hinge seat 912. A second movable rod 913 is coaxially arranged on the other end of the third hinge head, and the other end of the second movable rod 913 is sleeved inside the second sleeve 914. A fourth hinge head is coaxially arranged on the other end of the second sleeve 914, and a fourth hinge head is adapted on the other end of the fourth hinge head. A fourth hinge seat 915 is adapted on the other end of the fourth hinge head, and the other end of the fourth hinge seat 915 is connected to the front and rear inner walls of the second shell 7 through a second support plate. A second return spring 916 is also arranged between the third hinge head and the fourth hinge head. The length direction of the second baffle 92 is arranged along the length direction of the second shell 7, and the lower end surface of the second baffle 92 contacts the lower end surface inside the second shell 7. The middle part of the upper end of the second baffle 92 is connected to the middle part of the lower end of the second swing block 911. Figure 4 It is the state when the elevator is going down, that is, when the elevator car is going down, positive pressure is generated at the bottom of the car. At this time, the well air enters the interior of the downward positive pressure second cylinder 74 through the positive pressure, so that the fourth positive pressure pushing component 94 works to push the right end of the second swing block 911. When the second swing block 911 moves to the left, the second return spring 916 is compressed first, and the second movable rod 913 moves toward the inside of the second sleeve 914 first. When the middle part of the second swing block 911 crosses the straight line where the two fourth hinge seats 915 are located, the second return spring 916 begins to restore its original state, thereby causing the second movable rod 913 to move toward the outside of the second sleeve 914 until it moves to Figure 4state, at this time, the second baffle 92 just achieves the shielding of the upward air outlet 71, so that the air inside the inner compartment 1 can be discharged through the downward air outlet 72, and the upper end of the downward air outlet 72 is negative pressure, which is more conducive to the discharge of air in the inner compartment 1. Similarly, when the elevator car is ascending, the top of the car generates positive pressure. At this time, the hoistway air enters the interior of the upward positive pressure second cylinder 73 through the positive pressure, so that the third positive pressure pushing component 93 works to push the left end of the second swing block 911, so that the second baffle 92 shields the downward air outlet 72, so that the air inside the inner compartment 1 can be discharged through the upward air outlet 71.

[0044] Further, as a specific implementation method, refer to Figure 4 and Figure 6 , the axial direction of the upward positive pressure second cylinder 73 is horizontally arranged in the left-right direction, the third positive pressure pushing assembly 93 includes a third piston block 931 adapted to the upward positive pressure second cylinder 73, the third piston block 931 is coaxially provided with a third pushing support rod 932 near one end face of the second housing 7, the other end of the third pushing support rod 932 extends to the outside of the upward positive pressure second cylinder 73 and is provided with a third push head for pushing one end of the second swing block 911, and the part of the third pushing support rod 932 located inside the upward positive pressure second cylinder 73 is sleeved with a fifth return spring 935. When the elevator car goes down, the air inside the inner compartment 1 is discharged through the downward air outlet pipe 72, and the upper end of the downward air outlet pipe 72 is negative pressure. At this time, the air pressure entering the upward positive pressure second cylinder 73 is very small, and the third piston block 931 is in a non-moving state. However, when the elevator car goes upward, part of the positive-pressure air on the top of the car can reach the interior of the upward positive-pressure second cylinder 73 through the downward air outlet duct 72, so that the third piston block 931 moves toward the second shell 7, and then drives the third push head to move to push the second swing block 911 to achieve the second baffle 92 to block the port of the downward air outlet duct 72, so that the air in the inner compartment 1 is discharged through the upward air outlet duct 71 when going upward.

[0045] Further, as a specific implementation method, refer to Figure 4 and Figure 7The downward positive-pressure second cylinder 74 is in an inverted L-shape and is horizontally arranged at one end close to the second shell 7. The fourth positive-pressure pushing assembly 94 includes a fourth piston block 941 adapted to the horizontal section of the downward positive-pressure second cylinder 74. The fourth piston block 941 is coaxially provided with a fourth pushing support rod 942 at one end face close to the second shell 7. The other end of the fourth pushing support rod 942 extends to the outside of the downward positive-pressure second cylinder 74 and is provided with a fourth pushing head for pushing the other end of the second swing block 911. The part of the fourth pushing support rod 942 located inside the downward positive-pressure second cylinder 74 is sleeved with a sixth return spring 945. When the elevator car goes down, positive pressure is generated at the bottom of the car. At this time, the air in the hoistway enters the interior of the downward positive pressure second cylinder 74 through the positive pressure, so that the fourth piston block 941 moves toward the second shell 7, and then drives the fourth pusher to move to push the second swing block 911 to achieve the second baffle 92 to block the port of the upward air outlet 71, so that the air in the inner car 1 is discharged through the downward air outlet 72 when going down. At this time, the air in the hoistway can enter the interior of the first shell 6 through the downward air inlet 62 due to the positive pressure at the bottom of the car.

[0046] Further, as an implementation method, refer to Figure 2 and Figure 8 , and also includes a first shielding component arranged inside the first shell 6, including a first left-right swinging component 81 that drives the first shielding plate 82 to move left or right, a first positive pressure pushing component 83 arranged inside the upward positive pressure first cylinder 63 and causing the first shielding plate 82 to move to shield the port of the downward air inlet duct 62 when the elevator is ascending, and a second positive pressure pushing component 84 arranged inside the downward positive pressure first cylinder 64 and causing the first shielding plate 82 to move to shield the port of the upward air inlet duct 61 when the elevator is descending.

[0047] Further, as a specific implementation method, refer to Figure 8The first left-right swing component 81 includes a first swing block 811, the length direction of the first swing block 811 is horizontally arranged in the left-right direction, a first hinge seat is symmetrically arranged in the middle of the front and rear side surfaces of the first swing block 811, the first hinge seat is adapted with a first hinge head, the other end of the first hinge head is coaxially arranged with a first movable rod, the other end of the first movable rod is sleeved inside the first sleeve, the other end of the first sleeve is coaxially arranged with a second hinge head, the other end of the second hinge head is adapted with a second hinge seat, the other end of the second hinge seat is connected to the front and rear inner walls of the first shell 6 through a first support plate, a first return spring is also arranged between the first hinge head and the second hinge head, the length direction of the first baffle 82 is arranged along the length direction of the first shell 6 and the upper end surface of the first baffle 82 contacts the upper end surface inside the first shell 6, and the middle part of the lower end of the first baffle 82 is connected to the middle part of the upper end of the first swing block 811. Figure 8 This is the state when the elevator is going down, that is, when the elevator car is going down, positive pressure is generated at the bottom of the car. At this time, the air in the well enters the interior of the downward positive pressure first cylinder 64 through the positive pressure, so that the second positive pressure pushing component 84 works to push the left end of the first swing block 811. When the first swing block 811 moves to the right, the first return spring is compressed first, and the first movable rod moves toward the inside of the first sleeve first. When the middle part of the first swing block 811 crosses the straight line where the two second hinge seats are located, the first return spring begins to restore its original state, thereby causing the first movable rod to move toward the outside of the first sleeve until it moves to Figure 8 State, at this time, the first baffle 82 just achieves the shielding of the upward air inlet duct 61, so that the positive pressure air located below the inner compartment 1 can enter the first shell 6 and the inner compartment 1 through the downward air inlet duct 62, which is more conducive to the discharge of air in the inner compartment 1. Similarly, when the elevator car is ascending, positive pressure is generated on the top of the car. At this time, the hoistway air enters the upward positive pressure first cylinder 63 through positive pressure, so that the first positive pressure pushing component 83 works to push the right end of the first swing block 811, so that the first baffle 82 blocks the port of the downward air inlet duct 62, so that the air located above the inner compartment enters the first shell 6 and the inner compartment 1 through the upward air inlet duct 61.

[0048] Further, as a specific implementation method, refer to Figure 8 and Fig. 9The first upward positive pressure cylinder 63 is L-shaped and is horizontally arranged at one end close to the first housing 6. The first positive pressure pushing assembly 83 includes a first piston block 831 adapted to the horizontal section of the first upward positive pressure cylinder 63. The first piston block 831 is coaxially provided with a first pushing support rod 832 at one end face close to the first housing 6. The other end of the first pushing support rod 832 extends to the outside of the first upward positive pressure cylinder 63 and is provided with a first pushing head 834 for pushing one end of the first swing block 811. The part of the first pushing support rod 832 located inside the first upward positive pressure cylinder 63 is sleeved with a third return spring 835. When the elevator car goes up, part of the positive pressure air above the car enters the interior of the first upward positive pressure cylinder 63, thereby causing the first piston block 831 to move toward the direction close to the first housing 6, thereby causing the first pushing head 834 to push the first swing block 811, so that the first baffle 82 moves to achieve the shielding of the downward air inlet pipe 62.

[0049] Further, as a specific implementation method, refer to Figure 8 and Fig.10 , the axial direction of the first downward positive pressure cylinder 64 is horizontally arranged in the left-right direction, and the second positive pressure pushing assembly 84 includes a second piston block 841 adapted to the first downward positive pressure cylinder 64, and the second piston block 841 is coaxially provided with a second pushing support rod 842 on one end face close to the first housing 6, and the other end of the second pushing support rod 842 extends to the outside of the first downward positive pressure cylinder 64 and is provided with a second pushing head for pushing the other end of the first swing block 811, and the part of the second pushing support rod 842 located inside the first downward positive pressure cylinder 64 is sleeved with a fourth return spring 845. When the elevator car is descending, the positive pressure air below the car partially enters the interior of the first downward positive pressure cylinder 64, thereby causing the second piston block 841 to move in the direction close to the first housing 6, and then causing the second pushing head to push the first swing block 811, so that the first baffle 82 moves to achieve the shielding of the upward air inlet duct 61.

[0050] Further, the upward air inlet pipe 61, the downward air inlet pipe 62, the upward positive pressure first cylinder 63, the downward positive pressure first cylinder 64, the upward air outlet pipe 71, the downward air outlet pipe 72, the upward positive pressure second cylinder 73, and the downward positive pressure second cylinder 74 are respectively provided with a plurality of them, and the plurality of the upward air inlet pipes 61, the downward air inlet pipe 62, the upward positive pressure first cylinder 63, the downward positive pressure first cylinder 64, the upward air outlet pipe 71, the downward air outlet pipe 72, the upward positive pressure second cylinder 73, and the downward positive pressure second cylinder 74 are respectively arranged in sequence along the front-to-back direction, and the ends of the plurality of first push rods 832 away from the first piston block 831 are connected by the first push total rod 833. The first push head 834 is connected to the first pushing main rod 833, the ends of several second pushing support rods 842 away from the second piston block 841 are connected through the second pushing main rod 843, the second push head is connected to the second pushing main rod 843, the ends of several third pushing support rods 932 away from the third piston block 931 are connected through the third pushing main rod 933, the third push head is connected to the third pushing main rod 933, the ends of several fourth pushing support rods 942 away from the fourth piston block 941 are connected through the fourth pushing main rod 943, and the fourth push head is connected to the fourth pushing main rod 943.

[0051] Furthermore, the length directions of the first shell 6 and the second shell 7 are both arranged horizontally along the front-to-back direction, and two first shells 6 and two second shells 7 are respectively arranged, and the two first shells 6 are distributed along the left-right trisection line of the upper end surface of the inner compartment 1, and the two second shells 7 are respectively arranged at the middle position of the bottom of the left and right sides of the inner compartment 1. The optimal ventilation method will be adopted, that is, the two first shells are distributed along the left-right trisection line of the upper end surface of the inner compartment, and the two second shells are respectively arranged at the middle position of the bottom of the left and right sides of the inner compartment, and no matter whether the elevator is going up or down, the air in the hoistway can enter the inner compartment through the first shell and be discharged from the second shell, so as to achieve the best ventilation and purification capacity of the elevator car when going up or down.

[0052] Further, as an implementation method, refer to Figure 1, an outer compartment 2 is also provided outside the inner compartment 1, and a chamber 3 is enclosed between the outer wall of the inner compartment 1 and the inner wall of the outer compartment 2, the upward air inlet duct 61, the downward air inlet duct 62, the upward positive pressure first cylinder 63, the downward positive pressure first cylinder 64 and the upward air outlet duct 71, the downward air outlet duct 72, the upward positive pressure second cylinder 73, and the downward positive pressure second cylinder 74 are all located inside the chamber 3, and the upward air inlet duct 61 and the upward positive pressure first cylinder 63, one end away from the first shell 6, penetrate the upper end surface of the outer compartment 2 and extend to the outside, the downward air inlet duct 62, one end away from the first shell 6, penetrates the lower end surface of the outer compartment 2 and extends to the outside, the upward air outlet duct 71 and the downward positive pressure second cylinder 74, one end away from the second shell 7, penetrate the lower end surface of the outer compartment 2 and extend to the outside, and the downward air outlet duct 72, one end away from the second shell 7, penetrates the upper end surface of the outer compartment 2 and extends to the outside. The driving sources of the first shielding component and the second shielding component all come from the positive pressure generated when the car goes up and down, ensuring that the elevator car has a good ventilation effect when going up or down, and no additional external power supply and control components are required.

[0053] Furthermore, a first filter screen 10 is horizontally arranged inside the first shell 6 .

[0054] Furthermore, a second filter screen 11 is provided at a position where the second shell 7 communicates with the inner compartment 1 .

[0055] Embodiment 2: According to the working principles of the first shielding component and the second shielding component in the present application, when the elevator car goes up, the air above the car will enter the upward positive pressure first cylinder 63 and the upward positive pressure second cylinder 73, so that the first piston block 831 moves to push the first swing block 811, and the third piston block 931 moves to push the second swing block 911; when the elevator car goes down, the air below the car will enter the downward positive pressure first cylinder 64 and the downward positive pressure second cylinder 74, so that the second piston block 841 moves to push the first swing block 811, and the fourth piston block 941 moves to push the second swing block 911, but the displacements of the first piston block 831, the third piston block 931, the second piston block 841, and the fourth piston block 941 are affected by the external positive pressure air and their respective third return springs 835, Under the influence of the elastic force of the fifth return spring 935, the fourth return spring 845, and the sixth return spring 945, in order to ensure that the first piston block 831, the third piston block 931, the second piston block 841, and the fourth piston block 941 have a certain stable displacement when the external air pressure tends to a certain level, their respective displacement strokes are not easy to be too large. In order to better meet the larger displacement required by the first push head 834 and the second push head to push the first swing block 811 and the third push head and the fourth push head to push the second swing block 911, this embodiment adds a stroke amplification component on the basis of embodiment 1 to meet the first piston block 831, the third piston block 931, the second piston block 841, and the fourth piston block 941 When the stroke is small, the first push head 834, the second push head, the third push head, and the fourth push head have a larger displacement.

[0056] The present invention provides a ventilation and fresh air device for an elevator, referring to Figure 8 and Fig.11On the basis of Example 1, the first shielding component also includes a first stroke amplification component provided between the first pushing total rod 833 and the first pushing head 834 and a second stroke amplification component 86 provided between the second pushing total rod 843 and the second pushing head. The first stroke amplification component includes a third shell 851 provided on the side of the first shell 6 and connected thereto. A first screw rod 852 is horizontally provided inside the third shell 851 along the left and right directions. The left and right ends of the first screw rod 852 are respectively provided with a first thread 853 and a second thread 854. The first thread 853 and the second thread 854 have the same direction of rotation, the pitch of the first thread 853 is smaller than the pitch of the second thread 854, the first thread 853 is adapted with a first ball nut block 855, the second thread 854 is adapted with a second ball nut block 856, the first push total rod 833 is connected to the first ball nut block 855, the upper end surface of the second ball nut block 856 is horizontally provided with a first connecting rod 857 along the left-right direction, and the other end of the first connecting rod 857 is connected to the first push head 834. When the first piston block 831 moves toward the first housing 6, it can drive the first push total rod 833 to move toward the first housing 6, thereby causing the first ball nut block 855 to move toward the first housing 6, so that the first screw rod 852 rotates, thereby causing the second ball nut block 856 to move toward the first housing 6 with a displacement greater than that of the first ball nut block 855, thereby causing the first connecting rod 857 and the first push head 834 to have a larger displacement to push the first swing block 811.

[0057] A first guide rod 858 is also horizontally arranged inside the third shell 851 along the left-right direction, and a first guide hole matched with the first guide rod 858 is arranged on the first ball nut block 855 and the second ball nut block 856 .

[0058] refer to Figure 8 The structure of the second stroke amplifying assembly 86 is the same as that of the first stroke amplifying assembly, and the first stroke amplifying assembly and the second stroke amplifying assembly 86 are symmetrically arranged on the left and right sides of the first housing 6. The working principle of the second stroke amplifying assembly 86 is the same as that of the first stroke amplifying assembly.

[0059] Further, as an implementation method, refer to Figure 4 and Figure 8The second shielding component also includes a third stroke amplification component 95 disposed between the third push total rod 933 and the third push head, and a fourth stroke amplification component 96 disposed between the fourth push total rod 943 and the fourth push head. The structure and principle of the third stroke amplification component 95 and the fourth stroke amplification component 96 are the same as those of the first stroke amplification component and the second stroke amplification component 86, and the third stroke amplification component 95 and the fourth stroke amplification component 96 are symmetrically disposed on the left and right sides of the second housing 7.

[0060] Embodiment three: According to the working principles of the first shielding component and the second shielding component in the present application, no matter the elevator car goes up or down, the air inside the hoistway enters the inner compartment 1 through the first shell 6, and the air inside the hoistway is often accompanied by dust and other debris. In order to ensure the cleanliness of the air inside the inner compartment 1, it is necessary to set a first filter 10 inside the first shell 6 to filter the air entering the inner compartment 1. However, when a large amount of dust gathers on the upper end surface of the first filter 10, it will affect the amount of air entering the inner compartment 1 and reduce the circulation of the air inside the inner compartment 1. Therefore, it is necessary to clean the dust and debris on the upper end surface of the first filter 10 regularly.

[0061] The present invention provides a ventilation and fresh air device for an elevator, referring to Figure 2 , Fig.12 , Fig.13 and Fig.14 On the basis of Example 1, a cleaning component for cleaning dust on the upper end surface of the first filter 10 is further provided inside the first housing 6. The cleaning component includes a cleaning assembly 12 provided on the upper end surface of the first filter 10 and a driving assembly for moving the cleaning assembly 12 in the forward direction. The driving assembly works when the pressure difference generated on both sides of the first filter 10 reaches a preset value, so as to drive the cleaning assembly 12 to move in the forward direction to clean the upper end surface of the first filter 10.

[0062] The cleaning assembly 12 includes a movable plate 121, the length direction of the movable plate 121 is horizontally arranged along the left-right direction, the lower end surface of the movable plate 121 is provided with a cleaning surface 122 in contact with the upper end surface of the first filter 10 along its length direction, the first filter 10 is provided with a rectangular opening 123 penetrating the upper and lower end surfaces along its length direction, and the movable plate 121 is provided with a fifth connecting rod 124 extending vertically downward, and the other end of the fifth connecting rod 124 extends to the bottom of the first filter 10 through the rectangular opening 123. The cleaning surface 122 is a brush stroke distributed in a rectangular array.

[0063] Further, as a specific implementation method, refer to Fig.13The cleaning assembly 12 further includes a fifth screw rod 125, the axial direction of the fifth screw rod 125 is horizontally arranged in the front-to-back direction, the front and rear ends of the fifth screw rod 125 are connected to the front and rear inner walls of the first housing 6 through bearings, the fifth screw rod 125 is adapted with a fifth ball nut slider 126, the lower end of the fifth connecting rod 124 is connected to the upper end surface of the fifth ball nut slider 126, and one end of the fifth screw rod 125 is also provided with a gear 128. When the gear 128 rotates forward or reversely, it can drive the fifth screw rod 125 to rotate forward or reversely, and then drive the fifth ball nut slider 126 to move forward or backward, and then drive the fifth connecting rod 124 and the movable plate 121 to move forward or backward, so that the cleaning surface 122 moves forward and backward in front of the upper end surface of the first filter screen 10, and the upper end surface of the first filter screen 10 is cleaned.

[0064] A fifth guide rod 127 is horizontally arranged inside the first housing 6 along the front-to-rear direction thereof, and a fifth guide hole matched with the fifth guide rod 127 is arranged on the fifth ball nut slider 126 .

[0065] Further, as a specific implementation method, refer to Fig.12The driving assembly includes a driving seat 131, which is located on the side of the first shell 6. A piston cavity is horizontally arranged in the driving seat 131 along the left-right direction. A fifth piston block 132 is adapted inside the piston cavity. A first through hole 133 is arranged on an end face of the driving seat 131 away from the first shell 6. The first through hole 133 is connected with the upper end of the interior of the first shell 6 through an intake pipe 134. A solenoid valve 135 is arranged in the intake pipe 134. A first air pressure sensor is arranged on the upper end of the interior of the first shell 6, and a second air pressure sensor is arranged on the lower end of the interior of the first shell 6. Second through holes 136 are arranged on the left and right sides of the fifth piston block 132. A driving rod 137 is horizontally arranged on an end face of the fifth piston block 132 close to the first shell 6 along the left-right direction. The other end passes through the side of the first shell and extends to the interior, and the upper end surface of the driving rod 137 located inside the first shell 6 is provided with a rack 1310 meshing with the gear 128 along the left and right directions, and the lower side of the driving rod 137 is also provided with a U-shaped through hole 138, one end of the U-shaped through hole 138 is connected to the inside of the piston chamber, and the other end of the U-shaped through hole 138 is connected to the lower end of the interior of the first shell 6, and the fifth piston block 132 is also provided with a seventh return spring 139 on an end surface close to the first shell 6; a sealing guide cylinder adapted to the driving rod 137 is provided on the side of the first shell 6; the flow area of ​​the second through hole 136 is smaller than the flow area of ​​the first through hole 133, and the flow area of ​​the U-shaped through hole 138 is larger than the flow area of ​​the first through hole 133.The first air pressure sensor is used to detect the pressure at the upper end of the first filter 10, and the second air pressure sensor is used to detect the pressure at the lower end of the first filter 10. When the pressure difference between the upper and lower sides of the first filter 10 reaches a predetermined threshold, the solenoid valve 135 located at the air inlet pipe 134 opens, and part of the gas inside the first shell 6 enters the piston chamber through the air inlet pipe 134. At this time, the gas pressure value of the fifth piston block 132 on the side close to the first through hole 133 is greater than the gas pressure value on the other side, so that a pressure difference is generated on the left and right sides of the fifth piston block 132. Through the action of the pressure difference, the fifth piston block 132 is pushed to move toward the first shell 6, the seventh return spring 139 is squeezed, and the fifth piston block 132 drives the driving rod 137 to move toward the first shell 6. As the driving rod 137 moves, a port of the U-shaped through hole 138 away from the first shell 6 is blocked by a sealing guide cylinder arranged on the side of the first shell 6. At this time, the pressure difference on both sides of the fifth piston block 132 in the piston chamber is reduced, so The gas pressure on the fifth piston block 132 is gradually smaller than the elastic force of the seventh return compression spring 139. Under the elastic force of the seventh return compression spring 139, the fifth piston block 132 is pushed to move away from the first shell 6, driving the drive rod 137 to move, so that the U-shaped through hole 138 away from the end of the first shell 6 enters the piston cavity again, and the piston cavity and the first shell 6 are connected again, so that a pressure difference is generated on both sides of the fifth piston block 132, thereby achieving the purpose of reciprocating driving the fifth piston block 132. The fifth piston block 132 drives the drive rod 137 to reciprocate horizontally in the left and right directions, and then drives the rack 1310 to reciprocate horizontally in the left and right directions, thereby driving the gear 128 to rotate forward or reverse, and then driving the fifth screw rod 125 to rotate forward or reverse, thereby realizing the forward or backward movement of the fifth ball nut slider 126, and then driving the cleaning surface 122 to move forward or backward on the upper end surface of the first filter screen 10, thereby cleaning the upper end surface of the first filter screen 10.

[0066] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The above-mentioned embodiments only express the implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A ventilation and fresh air device for an elevator, characterized in that: include: A first shell (6) is arranged on the top of the inner compartment (1) and is in communication with the inner compartment (1); an upward air inlet pipe (61), a downward air inlet pipe (62), an upward positive-pressure first cylinder (63) and a downward positive-pressure first cylinder (64) are provided on the first shell (6); the other ends of the upward air inlet pipe (61) and the upward positive-pressure first cylinder (63) are arranged vertically upward, the other end of the downward air inlet pipe (62) is arranged vertically downward, and the other end of the downward positive-pressure first cylinder (64) is in communication with the downward air inlet pipe (62); A first shielding component disposed inside the first shell (6), comprising a first left-right swinging assembly (81) for driving the first shielding plate (82) to move leftward or rightward, a first positive pressure pushing assembly (83) disposed inside the first upward positive pressure cylinder (63) and causing the first shielding plate (82) to move to shield the port of the downward air inlet pipe (62) when the elevator is moving upward, and a second positive pressure pushing assembly (84) disposed inside the first downward positive pressure cylinder (64) and causing the first shielding plate (82) to move to shield the port of the upward air inlet pipe (61) when the elevator is moving downward; A second shell (7) is disposed at the lower ends of the left and right sides of the inner compartment (1) and is in communication with the inner compartment (1); an upward air outlet pipe (71), a downward air outlet pipe (72), an upward positive-pressure second cylinder (73) and a downward positive-pressure second cylinder (74) are provided on the second shell (7); the other ends of the upward air outlet pipe (71) and the downward positive-pressure second cylinder (74) are arranged vertically downward, the other end of the downward air outlet pipe (72) is arranged vertically upward, and the other end of the upward positive-pressure second cylinder (73) is in communication with the downward air outlet pipe (72); The second shielding component arranged inside the second shell (7) comprises a second left-right swinging assembly (91) for driving the second shielding plate (92) to move leftward or rightward, a third positive pressure pushing assembly (93) arranged inside the second upward positive pressure cylinder (73) and causing the second shielding plate (92) to move to shield the port of the downward air outlet pipe (72) when the elevator is moving upward, and a fourth positive pressure pushing assembly (94) arranged inside the second downward positive pressure cylinder (74) and causing the second shielding plate (92) to move to shield the port of the upward air outlet pipe (71) when the elevator is moving downward.

2. A ventilation and fresh air device for an elevator according to claim 1, characterized in that: An outer compartment (2) is also provided outside the inner compartment (1), and a chamber (3) is enclosed between the outer wall of the inner compartment (1) and the inner wall of the outer compartment (2). The upward air inlet pipe (61), the downward air inlet pipe (62), the upward positive pressure first cylinder body (63), the downward positive pressure first cylinder body (64), the upward air outlet pipe (71), the downward air outlet pipe (72), the upward positive pressure second cylinder body (73), and the downward positive pressure second cylinder body (74) are all located inside the chamber (3), and the upward air inlet pipe (61), the upward positive pressure first cylinder body (63), and the downward positive pressure second cylinder body (64) are all located inside the chamber (3). One end of the downward air inlet pipe (63) away from the first shell (6) passes through the upper end surface of the outer chamber (2) and extends to the outside; one end of the downward air inlet pipe (62) away from the first shell (6) passes through the lower end surface of the outer chamber (2) and extends to the outside; one end of the upward air outlet pipe (71) and the downward positive pressure second cylinder (74) away from the second shell (7) passes through the lower end surface of the outer chamber (2) and extends to the outside; one end of the downward air outlet pipe (72) away from the second shell (7) passes through the upper end surface of the outer chamber (2) and extends to the outside.

3. A ventilation and fresh air device for an elevator according to claim 1, characterized in that: The first left-right swing assembly (81) comprises a first swing block (811), the length direction of the first swing block (811) is arranged horizontally in the left-right direction, a first hinge seat is symmetrically arranged at the middle of the front and rear side surfaces of the first swing block (811), a first hinge head is adapted to the first hinge head, a first movable rod is coaxially arranged at the other end of the first hinge head, the other end of the first movable rod is sleeved inside the first sleeve, a second hinge head is coaxially arranged at the other end of the first sleeve, a second hinge seat is adapted to the other end of the second hinge head, the other end of the second hinge seat is connected to the front and rear inner walls of the first shell (6) through a first support plate, a first return spring is further arranged between the first hinge head and the second hinge head, the length direction of the first baffle (82) is arranged along the length direction of the first shell (6), the upper end surface of the first baffle (82) contacts the upper end surface of the first shell (6), and the middle part of the lower end of the first baffle (82) is connected to the middle part of the upper end of the first swing block (811).

4. A ventilation and fresh air device for an elevator according to claim 3, characterized in that: The first upward positive pressure cylinder (63) is L-shaped and is horizontally arranged at one end close to the first shell (6). The first positive pressure pushing assembly (83) includes a first piston block (831) adapted to the horizontal section of the first upward positive pressure cylinder (63). A first pushing support rod (832) is coaxially arranged at one end surface of the first piston block (831) close to the first shell (6). The other end of the first pushing support rod (832) extends to the outside of the first upward positive pressure cylinder (63) and is provided with a first pushing head (834) for pushing one end of the first swing block (811). The part of the first pushing support rod (832) located inside the first upward positive pressure cylinder (63) is sleeved with a third return spring (835).

5. A ventilation and fresh air device for an elevator according to claim 4, characterized in that: The axial direction of the first downward positive pressure cylinder (64) is horizontally arranged in the left-right direction, and the second positive pressure pushing assembly (84) includes a second piston block (841) adapted to the first downward positive pressure cylinder (64), and the second piston block (841) is coaxially provided with a second pushing support rod (842) on an end face close to the first shell (6), and the other end of the second pushing support rod (842) extends to the outside of the first downward positive pressure cylinder (64) and is provided with a second pushing head for pushing the other end of the first swing block (811), and the part of the second pushing support rod (842) located inside the first downward positive pressure cylinder (64) is sleeved with a fourth return spring (845).

6. A ventilation and fresh air device for an elevator according to claim 5, characterized in that: The second left-right swing assembly (91) comprises a second swing block (911), the length direction of the second swing block (911) being arranged horizontally in the left-right direction, a third hinge seat (912) being symmetrically arranged in the middle of the front and rear side surfaces of the second swing block (911), a third hinge head being adapted on the third hinge seat (912), a second movable rod (913) being coaxially arranged at the other end of the third hinge head, the other end of the second movable rod (913) being sleeved inside a second sleeve (914), and a fourth hinge head being coaxially arranged at the other end of the second sleeve (914). The other end of the fourth hinged joint is adapted to be equipped with a fourth hinged seat (915), and the other end of the fourth hinged seat (915) is connected to the front and rear inner walls of the second shell (7) through a second support plate. A second return spring (916) is also provided between the third hinged joint and the fourth hinged joint. The length direction of the second baffle (92) is provided along the length direction of the second shell (7) and the lower end surface of the second baffle (92) contacts the lower end surface of the second shell (7). The middle part of the upper end of the second baffle (92) is connected to the middle part of the lower end of the second swing block (911).

7. A ventilation and fresh air device for an elevator according to claim 6, characterized in that: The axial direction of the second upward positive pressure cylinder (73) is horizontally arranged in the left-right direction, and the third positive pressure pushing assembly (93) includes a third piston block (931) adapted to the second upward positive pressure cylinder (73), and the third piston block (931) is coaxially provided with a third pushing support rod (932) on one end face close to the second shell (7), and the other end of the third pushing support rod (932) extends to the outside of the second upward positive pressure cylinder (73) and is provided with a third pushing head for pushing one end of the second swing block (911), and the part of the third pushing support rod (932) located inside the second upward positive pressure cylinder (73) is sleeved with a fifth return spring (935).

8. A ventilation and fresh air device for an elevator according to claim 7, characterized in that: The downward positive pressure second cylinder (74) is in an inverted L-shape and is horizontally arranged at one end close to the second shell (7); the fourth positive pressure pushing assembly (94) includes a fourth piston block (941) adapted to the horizontal section of the downward positive pressure second cylinder (74); a fourth pushing support rod (942) is coaxially arranged on an end face of the fourth piston block (941) close to the second shell (7); the other end of the fourth pushing support rod (942) extends to the outside of the downward positive pressure second cylinder (74) and is provided with a fourth pushing head for pushing the other end of the second swing block (911); the portion of the fourth pushing support rod (942) located inside the downward positive pressure second cylinder (74) is sleeved with a sixth return spring (945).

9. A ventilation and fresh air device for an elevator according to claim 8, characterized in that: The upward air inlet pipe (61), the downward air inlet pipe (62), the upward positive pressure first cylinder (63), the downward positive pressure first cylinder (64), the upward air outlet pipe (71), the downward air outlet pipe (72), the upward positive pressure second cylinder (73), and the downward positive pressure second cylinder (74) are respectively provided in plurality, and the plurality of the upward air inlet pipes (61), the downward air inlet pipe (62), the upward positive pressure first cylinder (63), the downward positive pressure first cylinder (64), the upward air outlet pipe (71), the downward air outlet pipe (72), the upward positive pressure second cylinder (73), and the downward positive pressure second cylinder (74) are respectively arranged in sequence along the front-to-back direction, and the ends of the plurality of the first push rods (832) away from the first piston block (831) are connected through the first push total rod (83 3), the first push head (834) is connected to the first push main rod (833), one end of a plurality of the second push support rods (842) away from the second piston block (841) is connected via the second push main rod (843), the second push head is connected to the second push main rod (843), one end of a plurality of the third push support rods (932) away from the third piston block (931) is connected via the third push main rod (933), the third push head is connected to the third push main rod (933), one end of a plurality of the fourth push support rods (942) away from the fourth piston block (941) is connected via the fourth push main rod (943), and the fourth push head is connected to the fourth push main rod (943).

10. A ventilation and fresh air device for an elevator according to claim 9, characterized in that: The length directions of the first shell (6) and the second shell (7) are both arranged horizontally along the front-rear direction. Two first shells (6) and two second shells (7) are respectively arranged. The two first shells (6) are distributed along the left-right trisection line of the upper end surface of the inner compartment (1). The two second shells (7) are respectively arranged at the middle position of the bottom of the left and right side surfaces of the inner compartment (1).

Images