Safety protection device for feed port of warehouse

Abstract

The invention relates to the technical field of warehouse feed inlet safety protection devices, and discloses a warehouse feed inlet safety protection device which comprises a stock bin, the stock bin comprises a feed inlet, a movable plate and a feed box, the feed inlet is formed in the feed box, and eight rotating grooves are evenly formed in the feed inlet; the inner side of the rotating groove is rotationally connected with the movable plate through a rotating shaft, and a discharging mechanism is installed on the stock bin. The discharging mechanism comprises a driving assembly, a synchronous ring, a connecting assembly, a limiting assembly and a linkage assembly, through the arrangement of the driving assembly, the connecting assembly, the limiting assembly and the linkage assembly, the two movable plates distributed in a cross shape and an X shape rotate in a staggered mode through the driving assembly, materials are continuously stirred, the materials are prevented from being stacked at a feeding port, and the discharging efficiency is improved. And a spring in the connecting assembly can provide buffering when the movable plate encounters material resistance, equipment damage caused by hard collision is prevented, and the dredging effect is enhanced.

Description

Technical Field

[0001] This invention relates to the technical field of safety protection devices for warehouse inlets, specifically a safety protection device for warehouse inlets. Background Technology

[0002] In the process of warehouse material storage and transportation, the feed inlet is a key channel for materials to enter the silo, and its safety protection and functional design are of paramount importance. Existing warehouse feed inlet protection devices typically have the following problems:

[0003] Low material feeding efficiency and risk of jamming: Traditional feed inlets often use a fixed structure, which makes it easy for materials to accumulate or get stuck at the feed inlet during conveying. This is especially true for materials with uneven particle size or high moisture content, where jamming occurs more frequently, leading to feeding interruptions and affecting production efficiency.

[0004] Severe dust pollution: A large amount of dust is easily generated during the material feeding process. Existing equipment lacks effective dust suppression measures. Dust diffusion not only pollutes the working environment, but may also threaten the health of operators and the safety of equipment operation (such as dust accumulation causing equipment failure).

[0005] To address the aforementioned issues, this application proposes a safety protection device for warehouse inlets. Summary of the Invention

[0006] The purpose of this invention is to provide a safety protection device for warehouse inlet, so as to solve the problems of low material feeding efficiency, risk of material jamming and serious dust pollution in the prior art mentioned in the background.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a warehouse inlet safety protection device, comprising a silo, the silo comprising an inlet, a movable plate and a hopper, the inlet being installed on the hopper, eight rotating grooves being evenly provided on the inlet, the movable plate being rotatably connected to the inner side of the rotating grooves via a rotating shaft, and a feeding mechanism being installed on the silo;

[0008] The feeding mechanism includes a drive component, a synchronization ring, a connecting component, a limiting component, and a linkage component. The drive component is installed on the material box, and the synchronization ring is installed on the drive component. Two sets of the connecting components are installed on the movable plate, one set of the connecting components is equipped with the limiting component, and the other set of the connecting components is equipped with the linkage component.

[0009] Further, the driving component includes a base, a motor, a reciprocating screw rod, a slider, a clamping block and a fixing block. The base is fixedly connected to the front end face of the material box. The motor is fixedly connected to the inner side of the front end face of the base. The reciprocating screw rod is fixedly connected to the inner side of the motor. The slider is slidably mounted on the outer side of the reciprocating screw rod. The clamping block is fixedly connected to the inner side of the slider. The outer side of the clamping block is slidably connected to the reciprocating screw rod. The fixing block is fixedly connected to the left end of the slider. The left end of the fixing block is fixedly connected to the synchronous ring.

[0010] Further, the connecting component includes a convex block, a thin rod, a sliding rod, spring A and a sliding sleeve. A chute is provided inside the movable plate. The cross-section of the chute is in a "convex" shape. The convex block is slidably connected to the inner side wall of the chute. The thin rod is fixedly connected to the right end of the convex block. The sliding rod is fixedly connected to the right end of the thin rod. The sliding sleeve is slidably connected to the outer side of the sliding rod. Spring A is fixedly connected between the sliding rod and the sliding sleeve.

[0011] Further, the number of each set of the connecting components is four. The included angle between the four connecting components in each set is 90°. The included angle between the two sets of connecting components is 45°.

[0012] Further, the limiting component includes a limiting rod A and a limiting block A. The other end of the sliding sleeve of one set of the connecting components is fixedly connected to the limiting block A. The limiting rod A is slidably connected to the inner side of the limiting block A. The rear end face of the limiting rod A is fixedly connected to the feeding port. The outer side of the limiting block A is fixedly connected to the synchronous ring.

[0013] Further, the linkage component includes a limiting rod B, a limiting block B, spring B, a connecting rope, a connecting rod and a limiting ring. The other end of the sliding sleeve of the other set of the connecting components is fixedly connected to the limiting block B. The limiting rod B is slidably connected to the inner side of the limiting block B. The spring B is fixedly connected to the front end face of the limiting block B. The limiting rod B is in a "T" shape. The spring B is fixedly connected to the front end face of the limiting rod B. The connecting rope is fixedly connected between the sliding sleeve on the limiting block A and the sliding sleeve on the limiting block B in its clockwise direction. Four connecting rods are provided on the outer side of the movable plate. The other end of the connecting rod is fixedly connected to the limiting ring. The connecting rope is slidably connected to the outer side of the limiting ring.

[0014] Furthermore, a dust suppression and protection mechanism is also installed on the hopper. The dust suppression and protection mechanism includes a fan assembly, an adjustment assembly, a dust suppression auxiliary assembly, and a dust sensor. Four sets of the fan assemblies are evenly installed on the feed inlet. The adjustment assembly is installed on the fan assembly. The dust suppression auxiliary assembly is installed on the rear side of the fan assembly. The dust sensor is fixedly connected to the front end of the feed inlet at the position corresponding to the fan assembly.

[0015] Furthermore, the blower assembly includes a mounting bracket, a connecting ring, a blower, and a torsion spring. The mounting bracket is fixedly connected to the outer side of the feed inlet, and the connecting ring is fixedly connected to the other end of the mounting bracket. The blower is rotatably connected to the inner side of the connecting ring via a rotating shaft, and the torsion spring is fixedly connected between the blower and the connecting ring at the position corresponding to the rotating shaft.

[0016] Furthermore, the adjustment assembly includes a push frame and an electric telescopic rod; the push frame is fixedly connected to the inner ring of the connecting ring, and the electric telescopic rod is fixedly connected to the inner side of the push frame.

[0017] Furthermore, the dust suppression auxiliary component includes a ring pipe A, a ring pipe B, an inlet pipe, an outlet pipe, and a water box. The water box is located directly behind the fan. The inlet pipe and the outlet pipe are fixedly connected to the outside of the water box. The other end of the inlet pipe is connected to the ring pipe A, and the other end of the outlet pipe is connected to the ring pipe B.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. This invention, through the setting of a drive component, a connecting component, a limiting component, and a linkage component, drives the connecting ring to reciprocate through the drive component (motor and reciprocating lead screw), thereby causing two sets of movable plates distributed in a cross and X shape to rotate alternately, continuously moving the material, avoiding material accumulation at the feed inlet, significantly improving the feeding efficiency and stability. The spring in the connecting component can provide buffer when the movable plate encounters material resistance, preventing equipment damage caused by hard collisions, while ensuring that the movable plate always fits against the inner wall of the feed inlet, enhancing the unblocking effect.

[0020] 2. This invention utilizes a fan assembly, an adjustment assembly, and a dust suppression auxiliary assembly. A dust sensor monitors dust concentration in real time. When the concentration exceeds the standard, the electric telescopic rod automatically adjusts the fan angle to precisely target the dust source. Combined with the fan and water box, the dust and water are mixed for dust suppression, preventing secondary pollution. The dust suppression auxiliary assembly (ring pipe, inlet pipe, and outlet pipe) can automatically complete water circulation and replacement without manual intervention, ensuring continuous and stable dust suppression performance and reducing maintenance costs. Attached Figure Description

[0021] Figure 1This is a schematic diagram of the overall structure of a warehouse inlet safety protection device according to the present invention;

[0022] Figure 2 This is a schematic diagram of the installation structure of the unloading mechanism of a warehouse inlet safety protection device according to the present invention;

[0023] Figure 3 This is a schematic diagram of the installation structure of the drive assembly of a warehouse inlet safety protection device according to the present invention;

[0024] Figure 4 This is a schematic diagram of the installation structure of the locking block of a warehouse inlet safety protection device according to the present invention;

[0025] Figure 5 This is a schematic diagram of the installation structure of the connecting component and the limiting component of a warehouse inlet safety protection device according to the present invention;

[0026] Figure 6 This is a schematic diagram of the installation structure of the linkage component of a warehouse inlet safety protection device according to the present invention;

[0027] Figure 7 This is a schematic diagram of the installation structure of the dust suppression protection mechanism of a warehouse inlet safety protection device according to the present invention;

[0028] Figure 8 This is a schematic diagram of the installation structure of the fan assembly of a warehouse inlet safety protection device according to the present invention;

[0029] Figure 9 This is a schematic diagram of the installation structure of the adjustment component of a warehouse inlet safety protection device according to the present invention;

[0030] Figure 10 This is a schematic diagram of the installation structure of a dust suppression auxiliary component of a warehouse inlet safety protection device according to the present invention;

[0031] Figure 11 This is a schematic diagram of the installation structure of the protrusion in a warehouse inlet safety protection device according to the present invention; in the figure:

[0032] 1. Hopper; 11. Feed inlet; 12. Movable plate; 13. Material box;

[0033] 2. Feeding mechanism; 21. Drive assembly; 211. Base; 212. Motor; 213. Reciprocating lead screw; 214. Slider; 215. Locking block; 216. Fixing block; 22. Synchronizing ring; 23. Connecting assembly; 231. Protrusion; 232. Thin rod; 233. Slide rod; 234. Spring A; 235. Sliding sleeve; 24. Limiting assembly; 241. Limiting rod A; 242. Limiting block A; 25. Linkage assembly; 251. Limiting rod B; 252. Limiting block B; 253. Spring B; 254. Connecting rope; 255. Connecting rod; 256. Limiting ring;

[0034] 3. Dust suppression and protection mechanism; 31. Fan assembly; 311. Mounting bracket; 312. Connecting ring; 313. Fan; 314. Torsion spring; 32. Adjustment assembly; 321. Push frame; 322. Electric telescopic rod; 33. Dust suppression auxiliary assembly; 331. Ring pipe A; 332. Ring pipe B; 333. Inlet pipe; 334. Outlet pipe; 335. Water box; 34. Dust sensor. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0036] Please see Figures 1-11 The present invention provides a technical solution: a safety protection device for a warehouse inlet, including a silo 1, the silo 1 including an inlet 11, a movable plate 12 and a material box 13, the material box 13 is equipped with an inlet 11, and eight rotating grooves are evenly opened on the inlet 11. The movable plate 12 is rotatably connected to the inner side of the rotating groove through a rotating shaft. The material box 1 is equipped with a feeding mechanism 2.

[0037] The feeding mechanism 2 includes a drive component 21, a synchronization ring 22, a connecting component 23, a limit component 24, and a linkage component 25. The drive component 21 is installed on the material box 13, and the synchronization ring 22 is installed on the drive component 21. Two sets of connecting components 23 are installed on the movable plate 12. One set of connecting components 23 is equipped with a limit component 24, and the other set of connecting components 23 is equipped with a linkage component 25.

[0038] The drive assembly 21 includes a base 211, a motor 212, a reciprocating lead screw 213, a slider 214, a locking block 215, and a fixing block 216. The base 211 is fixedly connected to the front end face of the material box 13. The motor 212 is fixedly connected to the inner side of the front end face of the base 211. The reciprocating lead screw 213 is fixedly connected to the inner side of the motor 212. The slider 214 is slidably mounted on the outer side of the reciprocating lead screw 213. The locking block 215 is fixedly connected to the inner side of the slider 214. The outer side of the locking block 215 is slidably connected to the reciprocating lead screw 213. The fixing block 216 is fixedly connected to the left end of the slider 214. The left end of the fixing block 216 is fixedly connected to the synchronous ring 22.

[0039] The connecting assembly 23 includes a protrusion 231, a thin rod 232, a slide rod 233, a spring A234, and a sliding sleeve 235. A sliding groove is provided on the inner side of the movable plate 12. The cross-section of the sliding groove is convex. The protrusion 231 is slidably connected to the inner wall of the sliding groove. The thin rod 232 is fixedly connected to the right end of the protrusion 231. The slide rod 233 is fixedly connected to the right end of the thin rod 232. The sliding sleeve 235 is slidably connected to the outer side of the slide rod 233. The spring A234 is fixedly connected between the slide rod 233 and the sliding sleeve 235.

[0040] The number of connecting components 23 in each group is four, the included angle between the four connecting components 23 in each group is 90°, and the included angle between two groups of connecting components 23 is 45°.

[0041] The limiting component 24 includes a limiting rod A241 and a limiting block A242. The other end of the sliding sleeve 235 of a set of connecting components 23 is fixedly connected to the limiting block A242. The limiting rod A241 is slidably connected to the inner side of the limiting block A242. The rear end face of the limiting rod A241 is fixedly connected to the feed port 11. The outer side of the limiting block A242 is fixedly connected to the synchronization ring 22.

[0042] The linkage component 25 includes a limiting rod B251, a limiting block B252, a spring B253, a connecting rope 254, a connecting rod 255, and a limiting ring 256. The other end of the sliding sleeve 235 of another set of connecting components 23 is fixedly connected to the limiting block B252. The limiting rod B251 is slidably connected to the inner side of the limiting block B252. The spring B253 is fixedly connected to the front end face of the limiting block B252. The limiting rod B251 is arranged in a "T" shape. The front end face of the spring B253 is fixedly connected to the limiting rod B251. The sliding sleeve 235 on the limiting block A242 is fixedly connected to the sliding sleeve 235 on the clockwise limiting block B252 with the connecting rope 254. Four connecting rods 255 are provided on the outer side of the movable plate 12. The other end of the connecting rod 255 is fixedly connected to the limiting ring 256. The outer side of the connecting rope 254 is slidably connected to the limiting ring 256.

[0043] The silo 1 is also equipped with a dust suppression and protection mechanism 3. The dust suppression and protection mechanism 3 includes a fan assembly 31, an adjustment assembly 32, a dust suppression auxiliary assembly 33, and a dust sensor 34. Four sets of fan assemblies 31 are evenly installed on the feed inlet 11. An adjustment assembly 32 is installed on the fan assembly 31. A dust suppression auxiliary assembly 33 is installed on the rear side of the fan assembly 31. A dust sensor 34 is fixedly connected to the front end of the feed inlet 11 at the position corresponding to the fan assembly 31.

[0044] The blower assembly 31 includes a mounting bracket 311, a connecting ring 312, a blower 313, and a torsion spring 314. The mounting bracket 311 is fixedly connected to the outside of the feed inlet 11, and the connecting ring 312 is fixedly connected to the other end of the mounting bracket 311. The blower 313 is rotatably connected to the inside of the connecting ring 312 via a rotating shaft. A torsion spring 314 is fixedly connected between the blower 313 and the connecting ring 312 at the position corresponding to the rotating shaft.

[0045] The adjustment assembly 32 includes a pusher 321 and an electric telescopic rod 322; the pusher 321 is fixedly connected to the inner ring of the connecting ring 312, and the electric telescopic rod 322 is fixedly connected to the inner side of the pusher 321.

[0046] The dust suppression auxiliary component 33 includes a ring pipe A331, a ring pipe B332, an inlet pipe 333, an outlet pipe 334, and a water box 335. The water box 335 is located directly behind the fan 313. The inlet pipe 333 and the outlet pipe 334 are fixedly connected to the outside of the water box 335. The other end of the inlet pipe 333 is connected to the ring pipe A331, and the other end of the outlet pipe 334 is connected to the ring pipe B332.

[0047] Working principle:

[0048] When in use, the device is powered by an external power source. When the conveying equipment is connected to the feed inlet 11 and feeds material into the hopper 13 through the feed inlet 11, the motor 212 on the base 211 drives the reciprocating screw 213 to rotate. The limiting block A242 slides on the limiting rod A241 to limit the synchronous ring 22, causing the locking block 215 to drive the slider 214 to slide back and forth on the motor 212. Then, the slider 214 drives the fixing block 216 to move, and the fixing block 216 drives the synchronous ring 22 to move back and forth. The reciprocating motion of the synchronous ring 22 drives the limiting block A242 to slide back and forth on the limiting rod A241. The reciprocating motion of the limiting block A242 drives the corresponding sliding sleeve 235 to move. A set of cross-shaped sliding sleeves 235 move backward. During movement, the sliding sleeve 235 drives the sliding rod 233 to move. The sliding rod 233 is connected to the protrusion 231 through the thin rod 232. The protrusion 231 slides in a set of cross-shaped movable plates 12. The elastic force of the spring A234 pushes the sliding rod 233, causing the thin rod 232 to push the protrusion 231. The protrusion 231 pushes the movable plate 12 to rotate and extend out at the rear of the feed inlet 11. When the cross-shaped protrusion 231 moves backward, it pulls the connecting rope 254. The limiting ring 256 limits the connecting rope 254, and the connecting rope 254 pulls the X-shaped protrusion 231 forward. The X-shaped protrusion 231 drives the corresponding movable plate 12 to rotate and extend out at the front of the feed inlet 11. The cross-shaped movable plate 12 and the X-shaped protrusion 231 move forward. The interlocking movable plates 12 rotate alternately, allowing them to repeatedly move the material to avoid jamming, improving the stability and efficiency of material feeding. They also unblock the interior of the movable plates 12. During feeding, a dust sensor 34 detects the dust concentration. When the dust concentration exceeds the standard, the dust sensor 34 monitors the dust concentration in real time, and then the blower 313 operates, drawing the dust emitted from the upper part of the feed inlet 11 and blowing it towards the back of the blower 313. Based on the concentration from the dust sensor 34, the electric telescopic rod 322 on the pusher 321 operates, pushing the blower 313 to rotate on the connecting ring 312, adjusting the blower 313 towards the feed inlet 11 to improve the efficiency and effect of dust collection. When the concentration decreases, the electric telescopic rod 322... The rod 322 retracts partially, and then the torsion spring 314 rotates to drive the fan 313 to rotate. The fan 313 rotates and presses against the electric telescopic rod 322, thus completing the angle reversal of the fan 313. The dust sucked up by the fan 313 is blown towards the water box 335 and mixed with the water in the water box 335 to complete the dust suppression and avoid secondary waste of dust. The inlet pipe 333 is connected to a tap water pipe, and the outlet pipe 334 is connected to a water pump. When the water in the water box 335 needs to be replaced, the water pump runs and drains the water in the water box 335 through the ring pipe B332 connected to the outlet pipe 334. Then, the tap water pipe is opened, and the water in the water box 335 is replenished through the ring pipe A331 connected to the inlet pipe 333 to maintain the effect of water binding dust. The operation is simple.

Claims

1. A safety protection device for a warehouse inlet, characterized in that: It includes a silo (1), and the silo (1) includes a feed inlet (11), a movable plate (12) and a bin (13). The feed inlet (11) is installed on the bin (13). Eight rotating grooves are evenly opened on the feed inlet (11), and the movable plate (12) is rotatably connected to the inner side of the rotating groove through a rotating shaft. A blanking mechanism (2) is installed on the silo (1). The blanking mechanism (2) includes a driving component (21), a synchronous ring (22), a connecting component (23), a limiting component (24) and a linkage component (25). The driving component (21) is installed on the bin (13), the synchronous ring (22) is installed on the driving component (21), two groups of the connecting components (23) are installed on the movable plate (12), the limiting component (24) is installed on one group of the connecting components (23), and the linkage component (25) is installed on the other group of the connecting components (23).

2. The warehouse inlet safety protection device according to claim 1, characterized in that: The driving component (21) includes a base (211), a motor (212), a reciprocating screw rod (213), a slider (214), a clamping block (215) and a fixing block (216). The base (211) is fixedly connected to the front end face of the bin (13), the motor (212) is fixedly connected to the inner side of the front end face of the base (211), the reciprocating screw rod (213) is fixedly connected to the inner side of the motor (212), the slider (214) is slidably installed on the outer side of the reciprocating screw rod (213), the clamping block (215) is fixedly connected to the inner side of the slider (214), the clamping block (215) is slidably connected to the reciprocating screw rod (213) on the outer side, the fixing block (216) is fixedly connected to the left end of the slider (214), and the left end of the fixing block (216) is fixedly connected to the synchronous ring (22).

3. A warehouse inlet safety protection device according to claim 2, characterized in that: The connecting component (23) includes a convex block (231), a thin rod (232), a sliding rod (233), a spring A (234) and a sliding sleeve (235). A chute is opened inside the movable plate (12), and the cross section of the chute is in a "convex" shape. The convex block (231) is slidably connected to the inner side wall of the chute. The thin rod (232) is fixedly connected to the right end of the convex block (231), the sliding rod (233) is fixedly connected to the right end of the thin rod (232), the sliding sleeve (235) is slidably connected to the outer side of the sliding rod (233), and the spring A (234) is fixedly connected between the sliding rod (233) and the sliding sleeve (235).

4. A warehouse inlet safety protection device according to claim 3, characterized in that: The number of each group of the connecting components (23) is four, the included angle between every four of each group of the connecting components (23) is 90°, and the included angle between the two groups of the connecting components (23) is 45°.

5. A warehouse inlet safety protection device according to claim 4, characterized in that: The limiting component (24) includes a limiting rod A (241) and a limiting block A (242). The other end of the sliding sleeve (235) of a set of connecting components (23) is fixedly connected to the limiting block A (242). The limiting rod A (241) is slidably connected to the inner side of the limiting block A (242). The rear end face of the limiting rod A (241) is fixedly connected to the feed port (11). The outer side of the limiting block A (242) is fixedly connected to the synchronization ring (22).

6. A warehouse inlet safety protection device according to claim 5, characterized in that: The linkage assembly (25) includes a limiting rod B (251), a limiting block B (252), a spring B (253), a connecting rope (254), a connecting rod (255), and a limiting ring (256). The other end of the sliding sleeve (235) of another set of the connecting assemblies (23) is fixedly connected to the limiting block B (252). The limiting rod B (251) is slidably connected to the inner side of the limiting block B (252). The spring B (253) is fixedly connected to the front end face of the limiting block B (252). The limiting rod B (251) is T-shaped. The front end face of the spring B (253) is fixedly connected to the limiting rod B (251). The sliding sleeve (235) on the limiting block A (242) is fixedly connected to the sliding sleeve (235) on the limiting block B (252) in the clockwise direction by the connecting rope (254). Four connecting rods (255) are provided on the outer side of the movable plate (12). The other end of the connecting rod (255) is fixedly connected to the limiting ring (256). The outer side of the connecting rope (254) is slidably connected to the limiting ring (256).

7. A warehouse inlet safety protection device according to claim 1, characterized in that: The silo (1) is also equipped with a dust suppression and protection mechanism (3). The dust suppression and protection mechanism (3) includes a fan assembly (31), an adjustment assembly (32), a dust suppression auxiliary assembly (33), and a dust sensor (34). Four sets of the fan assemblies (31) are evenly installed on the feed inlet (11). The adjustment assembly (32) is installed on the fan assembly (31). The dust suppression auxiliary assembly (33) is installed on the rear side of the fan assembly (31). The dust sensor (34) is fixedly connected to the front end of the feed inlet (11) at the position corresponding to the fan assembly (31).

8. A warehouse inlet safety protection device according to claim 7, characterized in that: The fan assembly (31) includes a mounting bracket (311), a connecting ring (312), a fan (313), and a torsion spring (314). The mounting bracket (311) is fixedly connected to the outside of the feed inlet (11), and the connecting ring (312) is fixedly connected to the other end of the mounting bracket (311). The fan (313) is rotatably connected to the inside of the connecting ring (312) via a rotating shaft. The torsion spring (314) is fixedly connected between the fan (313) and the connecting ring (312) at the position corresponding to the rotating shaft.

9. A warehouse inlet safety protection device according to claim 8, characterized in that: The adjustment assembly (32) includes a push frame (321) and an electric telescopic rod (322); the push frame (321) is fixedly connected to the inner ring of the connecting ring (312), and the electric telescopic rod (322) is fixedly connected to the inner side of the push frame (321).

10. A warehouse inlet safety protection device according to claim 9, characterized in that: The dust suppression auxiliary component (33) includes a ring pipe A (331), a ring pipe B (332), an inlet pipe (333), an outlet pipe (334), and a water box (335). The water box (335) is located directly behind the fan (313). The inlet pipe (333) and the outlet pipe (334) are fixedly connected to the outside of the water box (335). The other end of the inlet pipe (333) is connected to the ring pipe A (331), and the other end of the outlet pipe (334) is connected to the ring pipe B (332).

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