Molecular sieve waste gas treatment device with multi-stage filtering function

Abstract

The invention discloses a molecular sieve waste gas treatment device with a multi-stage filtering function, and relates to the technical field of filtering, the molecular sieve waste gas treatment device comprises a rack, the rack is fixedly connected with hot air drainage frames symmetrically distributed along the rack, air outlets of the hot air drainage frames are communicated with downstream equipment, and a filtering frame is slidably connected in the rack; the filter frame is provided with molecular sieves symmetrically distributed along the filter frame, the rack is rotationally connected with two first rotating rods, and the first rotating rods are fixedly connected with cooling fans. The molecular sieves of different channels are switched at regular time, so that the single-channel molecular sieve can be effectively prevented from being in a high-temperature state for a long time, the influence of thermal aging is reduced, the service life of the molecular sieve is prolonged, meanwhile, the lower working temperature is maintained through cold air, the pore structure and adsorption capacity of the molecular sieve are favorably maintained, and the service life is prolonged. The adsorption and filtration process of the waste gas is more efficient.

Description

Technical Field

[0001] The present invention relates to the technical field of filtration, and in particular to a molecular sieve waste gas treatment device with a multi-stage filtration function. Background Art

[0002] During the waste gas treatment process, the molecular sieve removes harmful components in the waste gas, such as acidic gases, ammonia, and other trace pollutants, through the adsorption process, thereby purifying the gas stream to meet the emission standards or preparing it for subsequent treatment steps.

[0003] The molecular sieve is a porous material with a specific crystal structure, and its adsorption performance depends on the integrity and stability of this structure. However, since the just-discharged waste gas has residual heat, some molecular sieves may undergo structural changes or damage at the high temperature of the residual heat in the waste gas, resulting in the deformation or collapse of its microporous structure, thereby reducing its adsorption capacity; the high temperature of the residual heat in the waste gas can also promote chemical reactions occurring inside and on the surface of the molecular sieve, and these reactions may lead to a reduction in the effective surface area of the molecular sieve and an increase in the pore diameter, thereby affecting its selectivity and adsorption capacity, and thus accelerating the aging process of the molecular sieve. Summary of the Invention

[0004] In order to overcome the shortcomings of the molecular sieve being affected by the high temperature of the waste gas residual heat, the present invention provides a molecular sieve waste gas treatment device with a multi-stage filtration function.

[0005] A molecular sieve waste gas treatment device with a multi-stage filtration function includes a frame. The upper and lower sides of the frame are respectively provided with a first channel and a second channel. The frame is fixedly connected with hot air diversion frames symmetrically distributed along the frame. The air outlet of the hot air diversion frame is communicated with downstream equipment. A filter frame is slidably connected inside the frame. The filter frame is provided with molecular sieves symmetrically distributed along the filter frame. A rotating plate is rotatably connected inside the frame. The rotating plate controls the opening and closing of the first channel and the second channel. Two first rotating rods are rotatably connected to the frame. The first rotating rods are fixedly connected with cooling fans. When the rotating plate blocks the second channel, the air outlet of the upper cooling fan faces outward, and the air outlet of the lower cooling fan faces inward. The frame is provided with a rotating assembly for driving the two first rotating rods to rotate, and the frame is provided with a lifting assembly for controlling the lifting of the filter frame to switch the molecular sieves.

[0006] Preferably, the rotating assembly includes a cylinder. The cylinder is rotatably connected to the frame. The telescopic rod of the cylinder is rotatably connected to the rotating plate. The frame is fixedly connected with two guide rails. A sliding frame is slidably connected between the two guide rails. The telescopic rod of the cylinder is movably connected to the sliding frame. A first connecting rod is rotatably connected between the sliding frame and the adjacent first rotating rod. A rotating shaft is rotatably connected to one side of the frame close to the first rotating rod. A bevel gear set is connected between the two first rotating rods and the rotating shaft.

[0007] Preferably, an air pump is further included. The air pump is fixedly connected to the frame. A fixing frame is fixedly connected to the frame. The air outlet of the air pump communicates with the fixing frame. The cooling fan communicates with the fixing frame. A first air guiding frame is rotatably connected to the fixing frame. Two air guiding cavities are formed in the first air guiding frame. Two through holes are formed in the fixing frame. When one side of the air guiding cavity is aligned with the through hole, the air guiding cavity on the other side is misaligned with the through hole.

[0008] Preferably, a second connecting rod is further included. The second connecting rod is rotatably connected to the sliding frame. A second rotating rod is rotatably connected to the second connecting rod. The first air guiding frame is rotatably connected to the second rotating rod.

[0009] Preferably, second air guiding frames symmetrically distributed along the filter frame are further included. The second air guiding frames are fixedly connected to the frame.

[0010] Preferably, a connecting shaft longitudinally distributed along the filter frame is further included. The connecting shaft is fixedly connected to the filter frame. A first isolation plate is rotatably connected to the connecting shaft. A second isolation plate is rotatably connected to the connecting shaft. The first isolation plate and the second isolation plate near the first channel and the second channel of the frame are used for laying and isolating hot waste gas and cold air. Torsion springs are fixedly connected between the first isolation plate and the second isolation plate and the adjacent connecting shafts.

[0011] Preferably, the up-and-down movement of the filter frame drives the first isolation plate and the second isolation plate to move up and down synchronously. When the first isolation plate and the second isolation plate on one side move between two adjacent second air guiding frames, the first isolation plate and the second isolation plate on that side swing towards each other under the extrusion of the second air guiding frame.

[0012] Preferably, the lifting assembly includes an electric slide rail. The electric slide rail is fixedly connected to the frame. A third isolation plate is fixedly connected to the slider of the electric slide rail. The third isolation plate is fixedly connected to the filter frame. A sliding groove for the up-and-down sliding of the filter frame is formed on one side of the frame close to the third isolation plate. The third isolation plate is used to block the sliding groove.

[0013] Preferably, the lifting assembly further includes an air flow sensor. The air flow sensor is fixedly connected to the frame. The air flow sensor is electrically connected to the electric slide rail through a control module.

[0014] Advantageous effects: By periodically switching the molecular sieves in different channels, the present invention can effectively prevent the molecular sieves in a single channel from being in a high-temperature state for a long time, reduce the influence of thermal aging, thereby extending their service life. At the same time, by maintaining a low working temperature with cold air, it helps to maintain the pore structure and adsorption capacity of the molecular sieves, making the adsorption and filtration process of waste gas more efficient.

[0015] The present invention drives the first air guiding frame to rotate through the switching system of the waste gas channel, so that the air pump can automatically switch the cold air flow channel without stopping the machine, and the operation is simple and convenient.

[0016] In the present invention, the first partition plate and the second partition plate close to the first channel and the second channel of the frame are arranged in a tiled manner to isolate the hot waste gas and the cold air, avoiding the up-and-down cross-flow of the hot waste gas and the cold air in different channels.

[0017] In the present invention, the second air guiding frame guides the hot air flow after passing through the molecular sieve to the air outlet for discharge. And when the first partition plate and the second partition plate on one side move between two adjacent second air guiding frames, the first partition plate and the second partition plate on that side swing towards each other under the extrusion of the second air guiding frame, so that the first partition plate and the second partition plate can be received between the two second air guiding frames, thus not affecting the lifting and switching of the filter frame. Description of the Drawings

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0019] Figure 2 It is a three-dimensional structural sectional view of the present invention.

[0020] Figure 3 It is a three-dimensional structural schematic diagram of components such as the filter frame, cylinder and rotating plate of the present invention.

[0021] Figure 4 It is a three-dimensional structural schematic diagram of components such as the rotating plate, guide rail and sliding frame of the present invention.

[0022] Figure 5 It is a three-dimensional structural schematic diagram of components such as the frame, hot air diversion frame and rotating plate of the present invention.

[0023] Figure 6 It is a three-dimensional structural schematic diagram of components such as the frame, air pump and fixing frame of the present invention.

[0024] Figure 7 It is a three-dimensional structural schematic diagram of components such as the fixing frame, second connecting rod and second rotating rod of the present invention.

[0025] Figure 8 It is a three-dimensional structural schematic diagram of components such as the second rotating rod and the first air guiding frame of the present invention.

[0026] Figure 9 It is a three-dimensional structural schematic diagram of the first air guiding frame and the fixing frame of the present invention.

[0027] Figure 10 It is a three-dimensional structural schematic diagram of components such as the hot air diversion frame, filter frame and second air guiding frame of the present invention.

[0028] Figure 11 It is a three-dimensional structural schematic diagram of the second air guiding frame of the present invention.

[0029] Figure 12This is a three-dimensional structural schematic diagram of components such as the first partition board, the second partition board, and the torsion spring of the present invention.

[0030] Figure 13 This is a three-dimensional structural schematic diagram of the electric slide rail, the third partition board, and the air flow sensor of the present invention.

[0031] Figure 14 This is a three-dimensional structural schematic diagram of the filter rack, the electric slide rail, and the third partition board of the present invention.

[0032] Markings in the attached drawings: 101 - frame, 102 - hot air diversion rack, 103 - air outlet, 104 - filter rack, 1041 - molecular sieve, 105 - cylinder, 106 - rotating plate, 107 - guide rail, 108 - sliding rack, 109 - first connecting rod, 110 - first rotating rod, 111 - cooling fan, 112 - bevel gear set, 113 - rotating shaft, 201 - air pump, 202 - fixing rack, 203 - second connecting rod, 204 - second rotating rod, 205 - first air guiding rack, 206 - air guiding cavity, 207 - through hole, 301 - second air guiding rack, 401 - connecting shaft, 402 - first partition board, 403 - second partition board, 404 - torsion spring, 501 - electric slide rail, 502 - third partition board, 503 - air flow sensor. Detailed implementation manners

[0033] The following is only a preferred embodiment of the present invention, and does not limit the protection scope of the present invention accordingly.

[0034] Embodiment 1: A molecular sieve waste gas treatment device with a multi-stage filtering function, as Figures 1 - 5As shown in the figure, it includes a machine frame 101. In the middle of the machine frame 101, there is a hot air diversion frame 102 symmetrically distributed up and down along the machine frame 101. The air inlet of the upper hot air diversion frame 102 is at the top, and the air inlet of the lower hot air diversion frame 102 is at the bottom. The air outlet 103 of the hot air diversion frame 102 is communicated with the downstream exhaust equipment of the device. In the middle of the machine frame 101, there is a filter frame 104 slidably connected in the vertical direction. The filter frame 104 is provided with four groups of molecular sieves 1041 symmetrically distributed left and right along the filter frame 104 from top to bottom. When the filter frame 104 is in the upper part of the machine frame 101, a hot air stream mixed with inert gas is introduced into the upper hot air diversion frame 102 to regenerate the upper two groups of molecular sieves 1041. When the filter frame 104 slides down to the lower part of the machine frame 101, a hot air stream mixed with inert gas is introduced into the lower hot air diversion frame 102 to regenerate the lower two groups of molecular sieves 1041. On the left front side of the machine frame 101, there is a rotatably connected cylinder 105. Inside the machine frame 101, on the left side, there is a rotatably connected rotating plate 106. The telescopic rod of the cylinder 105 is rotatably connected to the upper front part of the rotating plate 106. On the upper and lower sides of the left part of the machine frame 101, a first channel and a second channel are respectively opened. The rotating plate 106 controls the opening and closing of the first channel and the second channel. On the left front side of the machine frame 101, there are two fixedly connected guide rails 107. Between the two guide rails 107, there is a slidably connected sliding frame 108 in the left-right direction. An activity slot is opened in the upper part of the sliding frame 108. The telescopic rod of the cylinder 105 is movably connected to the activity slot of the sliding frame 108. On the front side of the machine frame 101, there are two rotatably connected upper and lower first rotating rods 110. Between the sliding frame 108 and the upper first rotating rod 110, there is a first connecting rod 109 rotatably connected. A cooling fan 111 is fixedly connected to the first rotating rod 110. When the rotating plate 106 blocks the second channel, the air outlet of the upper cooling fan 111 faces outward, and the air outlet of the lower cooling fan 111 faces inward. On one side of the machine frame 101 close to the first rotating rod 110, there is a rotatably connected rotating shaft 113. A bevel gear set 112 is connected between the two first rotating rods 110 and the rotating shaft 113.

[0035] Initially, the waste gas to be treated is introduced into the first channel of the machine frame 101 from above the rotating plate 106. The waste gas passes through the molecular sieve 1041 of the first channel to the right to realize waste gas treatment. Due to the blocking effect of the rotating plate 106 and the lower cooling fan 111, the second channel of the machine frame 101 is closed. By introducing air into the lower cooling fan 111, the air cools the molecular sieve 1041 of the second channel. After running for a period of time, the telescopic rod of the control cylinder 105 extends, driving the rotating plate 106 to swing upward. At the same time, the telescopic rod of the cylinder 105 pushes the sliding frame 108 to slide to the right. The sliding frame 108 drives the upper first rotating rod 110 to rotate through the first connecting rod 109, thereby driving the upper cooling fan 111 to rotate towards the inside of the frame 101. The first rotating rod 110 drives the lower first rotating rod 110 to rotate through the bevel gear set 112, thereby driving the lower cooling fan 111 to rotate towards the outside of the frame 101. In this way, the second channel of the frame 101 is opened, and the exhaust gas to be processed is introduced into the second channel of the frame 101 from above the rotating plate 106. The exhaust gas passes through the molecular sieve 1041 of the second channel to the right, realizing the treatment of the exhaust gas. And due to the blocking effect of the rotating plate 106 and the upper cooling fan 111, the first channel of the frame 101 is closed. By introducing air into the upper cooling fan 111, the air cools the molecular sieve 1041 of the first channel; After running for another period of time, the telescopic rod of the control cylinder 105 is shortened to restore the initial state. By repeating this process, the present invention can effectively avoid the molecular sieve 1041 in a single channel being in a high-temperature state for a long time by regularly switching the molecular sieves 1041 in different channels, reducing the influence of thermal aging, thereby extending its service life. At the same time, by maintaining a lower working temperature with cold air, it helps to maintain the pore structure and adsorption capacity of the molecular sieve 1041, making the adsorption and filtration process of the exhaust gas more efficient.

[0036] In addition, the present invention passes a hot air flow mixed with inert gas through the hot air diversion frame 102 to raise the temperature on one side of the frame 101, which can provide sufficient energy to break the interaction force between the adsorbent and the adsorbate of the molecular sieve 1041 on that side, so that the adsorbed substances are desorbed from the pores of the molecular sieve 1041 on that side. At the same time, the desorbed pollutants are carried away by the inert gas to prevent them from being re-adsorbed. In this way, it helps the molecular sieve 1041 on that side to complete the regeneration process in the non-working state, enabling it to be recycled and maintaining good adsorption performance.

[0037] As Figure 1 、 Figure 13 and Figure 14 shown, it further includes an electric slide rail 501. The electric slide rail 501 is fixedly connected to the front side of the frame 101. The slider of the electric slide rail 501 is fixedly connected to a third isolation plate 502. The third isolation plate 502 is fixedly connected to the filter rack 104. A chute for the up and down sliding of the filter rack 104 is opened on one side of the frame 101 close to the third isolation plate 502. The third isolation plate 502 is used to block the chute to prevent gas from escaping through the chute. The frame 101 is fixedly connected with an air flow sensor 503. The air flow sensor 503 is electrically connected to the electric slide rail 501 through a control module.

[0038] When the molecular sieve 1041 at the lower side is blocked, the air flow sensor 503 controls the electric slide rail 501 through the control module to drive the third isolation plate 502 to move downward, thereby driving the filter rack 104 to move downward, so that the molecular sieve 1041 with the upper side regeneration completed moves to the first channel and the second channel for waste gas treatment or cooling work. When the molecular sieve 1041 at the upper side is blocked, the air flow sensor 503 controls the electric slide rail 501 through the control module to drive the third isolation plate 502 to move upward, thereby driving the filter rack 104 to move upward, so that the molecular sieve 1041 with the lower side regeneration completed moves to the first channel and the second channel for waste gas treatment or cooling work.

[0039] Embodiment 2: On the basis of Embodiment 1, as Figures 6 - 9 shown, it further includes an air pump 201. The air pump 201 is fixedly connected to the frame 101. A fixing frame 202 is fixedly connected to the left part of the front side of the frame 101. The air outlet of the air pump 201 is communicated with the fixing frame 202. The cooling fan 111 is communicated with the fixing frame 202. The upper part of the sliding frame 108 is rotatably connected to a second connecting rod 203. The second connecting rod 203 is rotatably connected to a second rotating rod 204. A first air guiding frame 205 is rotatably connected inside the fixing frame 202. The upper part of the first air guiding frame 205 is rotatably connected to the second rotating rod 204. The first air guiding frame 205 is provided with two upper and lower air guiding cavities 206. The fixing frame 202 is provided with two through holes 207. When one side of the air guiding cavity 206 is aligned with the through hole 207, the air guiding cavity 206 on the other side is misaligned with the through hole 207.

[0040] During the waste gas treatment, the air pump 201 is started. The air pump 201 conveys cold air to the middle part inside the fixing frame 202. Initially, the through hole 207 on the upper side of the fixing frame 202 is misaligned with the upper air guiding cavity 206 of the first air guiding frame 205, and the through hole 207 on the lower side of the fixing frame 202 is communicated with the lower air guiding cavity 206 of the first air guiding frame 205. The gas inside the middle part of the fixing frame 202 enters the lower part of the fixing frame 202 and then enters the lower cooling fan 111.

[0041] When the sliding frame 108 slides to the right, the sliding frame 108 drives the second rotating rod 204 to rotate through the second connecting rod 203, thereby driving the first air guiding frame 205 to rotate, so that the through hole 207 on the lower side of the fixing frame 202 is misaligned with the lower air guiding cavity 206 of the first air guiding frame 205, and the through hole 207 on the upper side of the fixing frame 202 is communicated with the upper air guiding cavity 206 of the first air guiding frame 205. The gas inside the middle part of the fixing frame 202 enters the upper part of the fixing frame 202 and then enters the upper cooling fan 111.

[0042] In this way, the present invention drives the first air guiding frame 205 to rotate through the waste gas channel switching system, so that the air pump 201 can automatically switch the cold air flow channel without shutting down, and the operation is simple and convenient.

[0043] Example 3: On the basis of Example 2, as Figure 10 and Figure 11 shown, it further includes second air guiding frames 301 symmetrically distributed on the left and right along the filter rack 104. The second air guiding frames 301 are fixedly connected to the frame 101. After the hot air flow introduced by the hot air diversion rack 102 passes through the molecular sieve 1041, the second air guiding frames 301 guide the hot air flow to the air outlet 103 for discharge.

[0044] As Figure 10 and Figure 12 shown, it further includes four connecting shafts 401 longitudinally distributed along the filter rack 104. The connecting shafts 401 are fixedly connected to the filter rack 104. A first isolation plate 402 is rotatably connected to the connecting shaft 401, and a second isolation plate 403 is rotatably connected to the connecting shaft 401. The first isolation plate 402 and the second isolation plate 403 near the first channel and the second channel of the frame 101 isolate the hot waste gas and the cold air in a flat-laying manner, avoiding the vertical cross-flow of the hot waste gas and the cold air in different channels. The up and down movement of the filter rack 104 drives the first isolation plate 402 and the second isolation plate 403 to move up and down synchronously. When the first isolation plate 402 and the second isolation plate 403 on one side move between two adjacent second air guiding frames 301, the first isolation plate 402 and the second isolation plate 403 on that side swing towards each other under the extrusion of the second air guiding frames 301, so that the first isolation plate 402 and the second isolation plate 403 can be received between the two second air guiding frames 301, thus not affecting the lifting and switching of the filter rack 104. A torsion spring 404 is fixedly connected between the first isolation plate 402 and the second isolation plate 403 and the adjacent connecting shaft 401.

[0045] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form. Any technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A molecular sieve waste gas treatment device with multi-stage filtration function, characterized in that: The invention comprises a frame (101), wherein the frame (101) is provided with a first channel and a second channel on the upper and lower sides respectively, the frame (101) is fixedly connected with a hot air guide frame (102) symmetrically distributed along the frame (101), an air outlet (103) of the hot air guide frame (102) is connected with a downstream device, a filter frame (104) is slidably connected inside the frame (101), the filter frame (104) is provided with a molecular sieve (1041) symmetrically distributed along the filter frame (104), and a rotating plate (106) is rotatably connected inside the frame (101), the rotating plate (106) ) controls the opening and closing of the first channel and the second channel, the frame (101) is rotatably connected to the two first rotating rods (110), the first rotating rods (110) are fixedly connected to the cooling fan (111), when the rotating plate (106) blocks the second channel, the air outlet of the upper cooling fan (111) faces outward, and the air outlet of the lower cooling fan (111) faces inward, the frame (101) is provided with a rotating component for driving the two first rotating rods (110) to rotate, and the frame (101) is provided with a lifting component for controlling the lifting of the filter frame (104) to switch the molecular sieve (1041).

2. The molecular sieve waste gas treatment device with multi-stage filtration function according to claim 1 is characterized in that: The rotating assembly comprises a cylinder (105), the cylinder (105) is rotatably connected to a frame (101), a telescopic rod of the cylinder (105) is rotatably connected to a rotating plate (106), the frame (101) is fixedly connected to two guide rails (107), a sliding frame (108) is slidably connected between the two guide rails (107), the telescopic rod of the cylinder (105) is movably connected to the sliding frame (108), a first connecting rod (109) is rotatably connected between the sliding frame (108) and an adjacent first rotating rod (110), a rotating shaft (113) is rotatably connected to a side of the frame (101) close to the first rotating rod (110), and a bevel gear set (112) is connected between the two first rotating rods (110) and the rotating shaft (113).

3. The molecular sieve waste gas treatment device with multi-stage filtration function according to claim 2 is characterized in that: The invention also includes an air pump (201), the air pump (201) is fixedly connected to the frame (101), the frame (101) is fixedly connected to a fixing frame (202), an air outlet of the air pump (201) is connected to the fixing frame (202), a cooling fan (111) is connected to the fixing frame (202), the fixing frame (202) is rotatably connected to a first air guide frame (205), the first air guide frame (205) is provided with two air guide cavities (206), the fixing frame (202) is provided with two through holes (207), and when the air guide cavity (206) on one side is aligned with the through hole (207), the air guide cavity (206) on the other side is misaligned with the through hole (207).

4. The molecular sieve waste gas treatment device with multi-stage filtration function according to claim 3 is characterized in that: It also includes a second connecting rod (203), the second connecting rod (203) is rotatably connected to the sliding frame (108), the second connecting rod (203) is rotatably connected to the second rotating rod (204), and the first air guide frame (205) is rotatably connected to the second rotating rod (204).

5. The molecular sieve waste gas treatment device with multi-stage filtration function according to claim 4 is characterized in that: It also includes a second air guide frame (301) symmetrically distributed along the filter frame (104), and the second air guide frame (301) is fixedly connected to the frame (101).

6. The molecular sieve waste gas treatment device with multi-stage filtration function according to claim 5 is characterized in that: It also includes a connecting shaft (401) distributed longitudinally along the filter frame (104), the connecting shaft (401) being fixedly connected to the filter frame (104), the connecting shaft (401) being rotatably connected to a first isolation plate (402), the connecting shaft (401) being rotatably connected to a second isolation plate (403), the first isolation plate (402) and the second isolation plate (403) being close to the first channel and the second channel of the frame (101) being used for flattening and isolating hot exhaust gas and cold air, and a torsion spring (404) being fixedly connected between the first isolation plate (402) and the second isolation plate (403) and the adjacent connecting shaft (401).

7. The molecular sieve waste gas treatment device with multi-stage filtration function according to claim 6 is characterized in that: The filter frame (104) moves up and down, driving the first isolation plate (402) and the second isolation plate (403) to move up and down synchronously; when the first isolation plate (402) and the second isolation plate (403) on one side move between two adjacent second air guide frames (301), the first isolation plate (402) and the second isolation plate (403) on that side are squeezed by the second air guide frames (301) and swing in a direction toward each other.

8. The molecular sieve waste gas treatment device with multi-stage filtration function according to claim 7 is characterized in that: The lifting assembly comprises an electric slide rail (501), the electric slide rail (501) is fixedly connected to the frame (101), a slider of the electric slide rail (501) is fixedly connected to a third isolation plate (502), the third isolation plate (502) is fixedly connected to the filter frame (104), a slide groove for the filter frame (104) to slide up and down is provided on a side of the frame (101) close to the third isolation plate (502), and the third isolation plate (502) is used to block the slide groove.

9. The molecular sieve waste gas treatment device with multi-stage filtration function according to claim 8 is characterized in that: The lifting assembly also includes an airflow sensor (503), the airflow sensor (503) is fixedly connected to the frame (101), and the airflow sensor (503) is electrically connected to the electric slide rail (501) through the control module.

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