A carbon dioxide filter tank

Abstract

The present invention relates to the field of gas filtration technology, specifically to a carbon dioxide filter tank, comprising a filter tank body, wherein the left and right sides of the top of the filter tank body are equipped with an air inlet seat and an air outlet seat; the interior of the filter tank body is equipped with a mesh plate one, a mesh plate two and an air pressure plate in sequence from bottom to top, and the interior of the filter tank body is divided into corresponding air outlet areas, air inlet areas, filter areas and transition areas in sequence from top to bottom; the present invention arranges mesh plate one, mesh plate two and an air pressure plate, and when they are assembled, it is convenient to divide the interior of the filter tank body into areas such as air outlet areas, air inlet areas, filter areas and transition areas; by arranging a transmission shaft, in cooperation with a stirring rod and a pushing rod, it is convenient to stir the gas and filtered adsorption particles in the filter area; by arranging a transmission screw, under the synchronous driving of the transmission shaft, the transmission screw is driven to rotate, thereby driving the air pressure plate to rise and fall to assist in squeezing the gas, which is beneficial to the filtering and absorption of carbon dioxide.

Description

Technical Field

[0001] The invention relates to the technical field of gas filtration, in particular to a carbon dioxide filter tank. Background Art

[0002] Carbon dioxide filter tanks are widely used, such as those installed in respirator-related applications, to handle gas filtration in respirator circuits. They generally react with carbon dioxide adsorbent particles for adsorption filtration, such as alkaline lime particles, soda lime, barium lime and calcium lime, and are supplemented with indicators for observation. The indicator is a pH-sensitive dye. When the soda lime reacts with carbon dioxide and becomes ineffective, the soda lime will change color accordingly depending on the indicator;

[0003] In this regard, the carbon dioxide filtering absorption tank disclosed in the authorized Chinese invention patent with announcement number CN219167420U includes: a tank body, the tank body includes a first tank body and a second tank body, the first tank body is arranged at the top of the second tank body, the first tank body includes an air inlet and an air outlet, and the second tank body is provided with a loading area for containing a carbon dioxide absorbent; an absorption tank base, the absorption tank base is detachably arranged at the downward opening of the tank body, and is connected with the tank body to form a closed space;

[0004] Although the carbon dioxide filter tank in the prior art can meet the needs of use, it still has the following shortcomings when used: it is inconvenient to stir the gas and particles for full reaction during filtration, and it is inconvenient to assist in pushing the gas, which affects the filtration efficiency.

[0005] Therefore, in order to solve the above problems, a carbon dioxide filter tank is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a carbon dioxide filter tank to solve the problem that the existing carbon dioxide filter tank proposed in the above background technology is inconvenient to stir the gas and particles for full reaction during filtration and to assist in pushing the gas, thus affecting the filtration efficiency.

[0007] To achieve the above object, the present invention provides the following technical solution: a carbon dioxide filter tank, comprising a filter tank body, wherein the top left and right sides of the filter tank body are equipped with an air inlet seat and an air outlet seat;

[0008] The interior of the filter tank body is sequentially equipped with mesh plate 1, mesh plate 2 and an air pressure plate from bottom to top, and the interior of the filter tank body is sequentially divided into corresponding air outlet area, air inlet area, filtration area and transition area from top to bottom. A transmission shaft is inserted through the middle of mesh plate 2 and mesh plate 1, and the outer wall of the transmission shaft is equipped with a stirring rod and a pushing rod, and the stirring rod and the pushing rod are located inside the filtration area. A transmission screw is fixed to the top of the transmission shaft, and the transmission screw is inserted through the middle of the air pressure plate. The bottom end of the transmission shaft extends to below the bottom wall of the filter tank body, and the bottom end of the transmission shaft is connected to a servo motor through a coupling. The servo motor is assembled at the bottom of the filter tank body, and an assembly bin is provided on the outside of the servo motor. A control module electrically connected to the servo motor through wires is arranged inside the assembly bin.

[0009] Preferably, the bottom of the air pressure plate is equipped with air intake head one and air intake head two, and air intake head one and air intake head two are located inside the air intake area, the upper end of the air intake head one is connected to the air intake seat through the air intake pipe, and an upper expansion joint is integrally provided in the middle of the air intake pipe, and the upper end of the air intake head two is connected to the air intake pipe through the adapter tube.

[0010] Preferably, an upper air outlet cover is mounted on the top of the air compression plate, and the upper air outlet cover is located inside the air outlet area, and a lower air outlet cover is mounted on the bottom of the mesh plate, and the lower air outlet cover is located inside the transition area, the lower air outlet cover and the upper air outlet cover are connected through an air outlet pipe, and a lower expansion joint is integrally provided on the upper part of the air outlet pipe, the lower expansion joint is located inside the air inlet area, an air outlet head is connected to the bottom of the air outlet seat through a docking pipe, and the air outlet head is located above the top of the air outlet area.

[0011] Preferably, a driving nut is integrally provided in the middle of the air compression plate, the driving nut is threadedly sleeved on the outer wall of the transmission screw, and limit covers are fixed at the upper and lower ends of the transmission screw.

[0012] Preferably, a sealing edge gasket is filled between the side wall of the air compression plate and the inner wall of the filter tank, and the sealing edge gasket is fixed to the outer wall of the air compression plate.

[0013] Preferably, limiting sliding rods are inserted through both sides of the middle part of the air compression plate, and the limiting sliding rods are fixed to the top wall of the filter tank body. Sealing sleeves corresponding to the limiting sliding rods are opened inside both sides of the middle part of the air compression plate, and sealing cotton is fixed inside the sealing sleeves.

[0014] Preferably, the outer walls of the transmission shaft and the transmission screw are fixed with assembly clamps, and the outer sleeve of the assembly clamps is provided with an assembly sleeve. Three groups of the assembly sleeves are assembled on the top inner wall and bottom wall of the filter tank body and the center of mesh plate 2. The mesh plates 1 and 2 are respectively integrally assembled with lower mesh holes and upper mesh holes, and a convex cover is integrally arranged in the center of mesh plate 1.

[0015] Preferably, a stirring sleeve and a pushing sleeve are respectively integrally provided in the middle of the stirring rod and the pushing rod, and the stirring sleeve and the pushing sleeve are mounted on the outer wall of the transmission shaft. Stirring teeth are staggered and fixed on the outside of the stirring rod, bottom rubber teeth are fixed at the bottom of the pushing rod, and upper pushing teeth are fixed at the top of the pushing rod.

[0016] Preferably, the upper side of the assembly bin and the lower side wall of the filter tank body are sleeved and assembled, and are fixed by inserting assembly nails, and a gasket is filled between the upper side of the assembly bin and the lower side wall of the filter tank body.

[0017] Preferably, an operation window is provided on the side of the filter tank body, the operation window is located at the level of the filter area, the interior of the operation window is sealed by a closed door, and a transparent plate is installed in the middle of the closed door.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. By setting the mesh plate 1, mesh plate 2 and air pressure plate, it is convenient to divide the inside of the filter tank into the gas outlet area, gas inlet area, filter area and transition area, etc., which is convenient for guiding the gas into the filter and auxiliary discharge, making the operation of filtering more convenient and efficient, and is conducive to the filtering and absorption of carbon dioxide;

[0020] 2. By setting up the transmission shaft, with the cooperation of the stirring rod and the pushing rod, it is convenient to stir the gas and the filter adsorption particles inside the filter area, making the filtration adsorption more convenient and efficient, which is conducive to the filtration and absorption of carbon dioxide;

[0021] 3. By setting a transmission screw, the transmission screw is driven to rotate under the synchronous drive of the transmission shaft, thereby driving the air compressor plate to move up and down to assist in squeezing the gas, making it more convenient to guide the gas in and out, which is beneficial to the filtration and absorption of carbon dioxide;

[0022] 4. While designing the above structure, the control module is assembled to facilitate the control of the servo motor in subsequent use, so that it can drive the rotation of the transmission shaft and the transmission screw in forward and reverse rotation, which is beneficial to the filtration and absorption of carbon dioxide and the intake and exhaust of air. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic cross-sectional view of the structure of the present invention;

[0025] Figure 2 It is a schematic diagram of a top view of the structure of the present invention;

[0026] Figure 3 It is a top view cross-sectional schematic diagram of the local structure of the air compression plate of the present invention;

[0027] Figure 4 It is a schematic side view of the structure of the present invention;

[0028] Figure 5 For the present invention Figure 1 A schematic diagram of the structure enlargement in the middle;

[0029] Figure 6 For the present invention Figure 1 A magnified schematic diagram of the structure at B in the middle;

[0030] Figure 7 For the present invention Figure 1 A magnified schematic diagram of the structure at C in the middle;

[0031] Figure 8 For the present invention Figure 1 Enlarged schematic diagram of the structure at point D in the middle.

[0032] In the figure: 100, filter tank; 101, air inlet seat; 102, air outlet seat; 103, operating window; 104, closed door; 105, transparent plate; 110, air inlet area; 111, air inlet head 1; 112, air inlet pipe; 113, upper telescopic joint; 114, transfer pipe; 115, air inlet head 2; 120, filter area; 130, transition area; 131, air outlet lower cover; 132, air outlet upper cover; 133, air outlet pipe; 134, lower telescopic joint; 135, air outlet head; 136, butt pipe; 140, air outlet area; 200, mesh plate 1; 201, lower mesh hole; 202, convex cover; 210, mesh Plate 2; 211, upper mesh hole; 220, air pressure plate; 221, limit slide rod; 222, sealing sleeve gasket; 223, sealing edge gasket; 300, transmission shaft; 301, coupling; 302, servo motor; 303, assembly clamp ring; 304, assembly sleeve; 310, stirring rod; 311, stirring sleeve; 312, stirring teeth; 320, push rod; 321, push sleeve; 322, bottom rubber teeth; 323, upper push teeth; 400, transmission screw; 401, limit cover; 410, drive nut; 500, assembly bin; 501, assembly nail; 502, washer; 510, control module. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1-8 , an embodiment provided by the present invention: a carbon dioxide filter tank, comprising a filter tank body 100, wherein an air inlet seat 101 and an air outlet seat 102 are mounted on the left and right sides of the top of the filter tank body 100;

[0035] The filter tank body 100 is provided with a mesh plate 200, a mesh plate 210 and a pressure plate 220 from bottom to top, and the filter tank body 100 is divided into a corresponding air outlet area 140, an air inlet area 110, a filter area 120 and a transition area 130 from top to bottom. A transmission shaft 300 is inserted through the middle of the mesh plate 210 and the mesh plate 1 200, and a stirring rod 310 and a push rod 320 are provided on the outer wall of the transmission shaft 300. The stirring rod 310 and the push rod 320 are located inside the filter area 120. A transmission screw 400 is fixed to the top of the moving shaft 300, and the transmission screw 400 is inserted through the middle of the air pressure plate 220. The bottom end of the transmission shaft 300 extends to below the bottom wall of the filter tank body 100, and the bottom end of the transmission shaft 300 is connected to a servo motor 302 through a coupling 301. The servo motor 302 is assembled at the bottom of the filter tank body 100. An assembly chamber 500 is sleeved outside the servo motor 302, and a control module 510 electrically connected to the servo motor 302 through a wire is arranged inside the assembly chamber 500;

[0036] Furthermore, the bottom of the air compression plate 220 is equipped with an air inlet head 111 and an air inlet head 2 115, and the air inlet head 111 and the air inlet head 2 115 are located inside the air inlet area 110, the upper end of the air inlet head 111 is connected to the air inlet seat 101 through the air inlet pipe 112, and the middle of the air inlet pipe 112 is integrally provided with an upper telescopic joint 113, and the upper end of the air inlet head 2 115 is connected to the air inlet pipe 112 through the transfer pipe 114. Through this design, it is convenient to introduce gas without hindering the lifting and lowering of the air compression plate 220;

[0037] Further, an upper gas outlet cover 132 is mounted on the top of the air compression plate 220, and the upper gas outlet cover 132 is located inside the gas outlet area 140, and an lower gas outlet cover 131 is mounted on the bottom of the mesh plate 200, and the lower gas outlet cover 131 is located inside the transition area 130, and the lower gas outlet cover 131 and the upper gas outlet cover 132 are connected and connected through an air outlet pipe 133, and a lower telescopic joint 134 is integrally provided on the upper part of the air outlet pipe 133, and the lower telescopic joint 134 is located inside the air inlet area 110, and an air outlet head 135 is connected to the lower part of the air outlet seat 102 through a docking pipe 136, and the air outlet head 135 is located above the top of the air outlet area 140. This design facilitates the discharge of the filtered gas without hindering the lifting and lowering of the air compression plate 220.

[0038] Furthermore, a driving nut 410 is integrally provided in the middle of the air compression plate 220, and the driving nut 410 is threadedly sleeved on the outer wall of the transmission screw 400, and the upper and lower ends of the transmission screw 400 are fixed with limit covers 401. Through this design, it is convenient to drive the air compression plate 220 to rise and fall by rotating the transmission screw 400;

[0039] Furthermore, a sealing edge pad 223 is filled between the side wall of the air compression plate 220 and the inner wall of the filter tank body 100, and the sealing edge pad 223 is fixed to the outer wall of the air compression plate 220. Through this design, the side wall of the air compression plate 220 and the inner wall of the filter tank body 100 are relatively sealed, which is convenient for auxiliary sealing during lifting;

[0040] Furthermore, limiting slide bars 221 are inserted through both sides of the middle of the air compression plate 220, and the limiting slide bars 221 are fixed to the top wall of the filter tank body 100. Sealing sleeves 222 corresponding to the limiting slide bars 221 are provided inside the middle of the air compression plate 220, and sealing cotton is fixed inside the sealing sleeves 222. Through this design, it is convenient to assist in limiting the position of the air compression plate 220, so that the driving screw 400 will not drive the driving nut 410 and the air compression plate 220 to rotate when rotating, so as to facilitate its stable lifting;

[0041] Furthermore, the outer walls of the transmission shaft 300 and the transmission screw 400 are fixed with an assembly collar 303, and the outer sleeve of the assembly collar 303 is provided with an assembly collar 304. Three sets of assembly collars 304 are assembled on the top inner wall and the bottom wall of the filter tank body 100 and the center of the second mesh plate 210. The mesh plates 1 200 and 210 are respectively integrated with the lower mesh hole 201 and the upper mesh hole 211, and the mesh plate 1 200 is integrated with the center of the convex cover 202. Through this design, the transmission shaft 300 and the transmission screw 400 are easily assembled stably, which is convenient for subsequent driving and the filtration of gas.

[0042] Furthermore, a stirring sleeve 311 and a pushing sleeve 321 are respectively integrally provided at the middle of the stirring rod 310 and the pushing rod 320. The stirring sleeve 311 and the pushing sleeve 321 are sleeved and assembled on the outer wall of the transmission shaft 300. Stirring teeth 312 are staggeredly fixed on the outside of the stirring rod 310, bottom rubber teeth 322 are fixed at the bottom of the pushing rod 320, and upper pushing teeth 323 are fixed at the top of the pushing rod 320. Through this design, stirring inside the filtration area 120 and pushing the surface of the mesh plate 200 are facilitated, making the operation more convenient.

[0043] Furthermore, the upper side of the assembly bin 500 and the lower side wall of the filter tank body 100 are sleeved and assembled, and are fixed by inserting the assembly nails 501. A gasket 502 is filled between the upper side of the assembly bin 500 and the lower side wall of the filter tank body 100. Through this design, the assembly bin 500 and the filter tank body 100 are conveniently butt-jointed and relatively sealed, and are convenient for maintenance.

[0044] Furthermore, an operation window 103 is provided on the side of the filter tank body 100, and the operation window 103 is located at the level of the filter area 120. The interior of the operation window 103 is sealed by a closed door 104, and a transparent plate 105 is installed in the middle of the closed door 104. Through this design, it is convenient to observe and subsequently replace the adsorbed particles in the filter area 120.

[0045] Working principle: When in use, the carbon dioxide adsorption particles are placed inside the filter area 120, that is, placed on the surface of the mesh plate 200, and then connected to the inlet and outlet ends of the device with the cooperation of the inlet seat 101 and the outlet seat 102, and the control module 510 and the servo motor 302 are powered on. Then, when the gas enters through the inlet seat 101, it enters the inlet area 110 through the inlet pipe 112, and then passes through the filter area 120 in turn to contact and adsorb the adsorption particles, and then enters the transition area 130, and then enters the outlet area 140 through the outlet pipe 133, and enters the outlet seat 102 through the butt pipe 136;

[0046] During the process, the control module 510 drives the servo motor 302 to rotate forward and reverse at a fixed time, thereby driving the transmission shaft 300 to rotate, and the transmission shaft 300 drives the stirring rod 310 and the pushing rod 320 to rotate to stir the gas and the adsorbed particles, so as to facilitate the rapid filtration and adsorption of carbon dioxide in the gas. When the transmission shaft 300 rotates, it drives the transmission screw 400 to rotate, and drives the driving nut 410 to rise and fall through the threaded connection, so that the driving nut 410 drives the pressure plate 220 to rise and fall, so that the pressure plate 220 squeezes the gas entering the air inlet area 110, so as to facilitate the gas to be pressed into the filtering area 120 and the transition area 130. When the servo motor 302 rotates forward and reverse at a fixed time, it is convenient to drive the pressure plate 220 to rise and fall, so that the pressure plate 220 is convenient to reciprocate and compress the gas in the air inlet area 110 and the air outlet area 140, so that the gas in and out is more convenient;

[0047] During the process, when the air compression plate 220 is raised or lowered, the cooperation of the sealing edge pad 223 facilitates relative sealing. At the same time, with the cooperation of the limiting slide bar 221, the lifting and lowering of the air compression plate 220 can be limited, and the air compression plate 220 will not rotate with the transmission screw 400, making the operation more convenient and stable. When the pushing rod 320 is stirring, the bottom rubber teeth 322 facilitate the pushing of the surface of the lower mesh 201, which is not easy to be blocked and facilitates the entry of gas. With the cooperation of the transparent plate 105, it is easy to observe the adsorbed particles inside the filtration area 120, which is convenient for subsequent timely replacement.

[0048] It should be noted that, in the present application, the connection and specific connection structure of the servo motor 302 and the control module 510 and the control timing principle are all prior art, for example, the timing control can be realized by programming such as relays or PLCs, and the associated words such as assembly connection in the present application are common knowledge to those skilled in the art, and can be realized by a variety of implementation methods, and no other special requirements are made in the present application, as long as it can realize the functions in the present application, so no specific limitation is made here;

[0049] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A carbon dioxide filter tank, comprising a filter tank body (100), wherein the filter tank body (100) is equipped with an air inlet seat (101) and an air outlet seat (102) on the left and right sides of the top; Features: The interior of the filter tank body (100) is sequentially equipped with mesh plate 1 (200), mesh plate 2 (210) and air pressure plate (220) from bottom to top. The interior of the filter tank body (100) is sequentially divided into corresponding air outlet area (140), air inlet area (110), filtration area (120) and transition area (130) from top to bottom. A transmission shaft (300) is inserted through the middle of mesh plate 2 (210) and mesh plate 1 (200). The outer wall of the transmission shaft (300) is equipped with a stirring rod (310) and a pushing rod (320). The stirring rod (310) and the pushing rod (320) are located inside the filtration area (120). The top of the transmission shaft (300) is fixed with a transmission shaft (300). A driving screw (400) is inserted through the middle of the air pressure plate (220), the bottom end of the driving shaft (300) extends to below the bottom wall of the filter tank body (100), and the bottom end of the driving shaft (300) is connected to a servo motor (302) through a coupling (301), the servo motor (302) is assembled at the bottom of the filter tank body (100), an assembly bin (500) is sleeved on the outside of the servo motor (302), and a control module (510) is arranged inside the assembly bin (500) and is electrically connected to the servo motor (302) through a wire, and an air inlet head 1 (111) and an air inlet head 2 (115) are assembled at the bottom of the air pressure plate (220). , and the air inlet head 1 (111) and the air inlet head 2 (115) are located inside the air inlet area (110), the upper end of the air inlet head 1 (111) is connected to the air inlet seat (101) through the air inlet pipe (112), and the middle of the air inlet pipe (112) is integrally provided with an upper telescopic joint (113), the upper end of the air inlet head 2 (115) is connected to the air inlet pipe (112) through the transfer pipe (114), the top of the air pressure plate (220) is equipped with an air outlet upper cover (132), and the air outlet upper cover (132) is located inside the air outlet area (140), and the bottom of the mesh plate 1 (200) is equipped with an air outlet lower cover (131), and the air outlet lower cover (131) is located inside the transition area (130) The lower air outlet cover (131) and the upper air outlet cover (132) are connected and communicated with each other through an air outlet pipe (133), and a lower telescopic joint (134) is integrally provided on the upper part of the air outlet pipe (133), and the lower telescopic joint (134) is located inside the air inlet area (110). An air outlet head (135) is connected to the lower part of the air outlet seat (102) through a docking pipe (136), and the air outlet head (135) is located above the top of the air outlet area (140). A driving nut (410) is integrally provided in the middle part of the air compression plate (220), and the driving nut (410) is threadedly sleeved on the outer wall of the driving screw (400), and the upper and lower ends of the driving screw (400) are fixed with limit covers (401).

2. A carbon dioxide filter tank according to claim 1, characterized in that: A sealing edge gasket (223) is filled between the side wall of the air compression plate (220) and the inner wall of the filtering tank body (100), and the sealing edge gasket (223) is fixed to the outer wall of the air compression plate (220).

3. A carbon dioxide filter tank according to claim 1, characterized in that: Limiting slide bars (221) are inserted through both sides of the middle of the air compression plate (220), and the limiting slide bars (221) are fixed to the inner top wall of the filter tank body (100). Sealing sleeves (222) corresponding to the limiting slide bars (221) are opened inside both sides of the middle of the air compression plate (220), and sealing cotton is fixed inside the sealing sleeves (222).

4. A carbon dioxide filter tank according to claim 1, characterized in that: An assembly collar (303) is fixed to the outer wall of the transmission shaft (300) and the transmission screw (400), and an assembly collar (304) is sleeved on the outside of the assembly collar (303). Three groups of the assembly collars (304) are assembled on the top inner wall and the bottom wall of the filter tank body (100) and the center of the second mesh plate (210). The first mesh plate (200) and the second mesh plate (210) are respectively integrally assembled with a lower mesh hole (201) and an upper mesh hole (211), and a convex cover (202) is integrally arranged in the center of the first mesh plate (200).

5. A carbon dioxide filter tank according to claim 1, characterized in that: A stirring rotating sleeve (311) and a pushing rotating sleeve (321) are respectively integrally arranged in the middle of the stirring rod (310) and the pushing rod (320); the stirring rotating sleeve (311) and the pushing rotating sleeve (321) are sleeved and assembled on the outer wall of the transmission shaft (300); stirring teeth (312) are staggeredly fixed on the outside of the stirring rod (310); bottom rubber teeth (322) are fixed at the bottom of the pushing rod (320); and upper pushing teeth (323) are fixed at the top of the pushing rod (320).

6. A carbon dioxide filter tank according to claim 1, characterized in that: The upper side edge of the assembly bin (500) and the lower side wall of the filter tank body (100) are sleeved and assembled, and are inserted and fixed by assembly nails (501), and a gasket (502) is filled between the upper side edge of the assembly bin (500) and the lower side wall of the filter tank body (100).

7. A carbon dioxide filter tank according to claim 1, characterized in that: An operating window (103) is provided on the side of the filtering tank body (100), and the operating window (103) is located at the level of the filtering area (120). The interior of the operating window (103) is sealed by a closed door (104), and a transparent plate (105) is installed in the middle of the closed door (104).

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