Range hood

Abstract

The utility model relates to a range hood with an automatic water taking structure, which comprises a machine body (A) and a water pump (1) arranged on the machine body (A), the water outlet end of the water pump (1) is connected with a cleaning mechanism of the range hood, and the water inlet end of the water pump (1) is connected with a water suction pipe (2) which can be drawn out from the machine body during use. The water suction machine is characterized in that a water pipe recovery mechanism (4) capable of automatically recovering and storing the water suction pipe is further arranged in the machine body. Compared with the prior art, the water suction pipe recovery device has the advantages that the water pipe recovery mechanism capable of automatically recovering and storing the water suction pipe is further arranged in the machine body, so that a user can conveniently take, place and recover the water suction pipe.

Description

Technical Field

[0001] This utility model relates to the field of kitchenware, specifically to a range hood. Background Technology

[0002] After a period of use, the impeller inside a range hood will accumulate a thick layer of grease. Manually cleaning the impeller is a chore, and disassembling, cleaning, and reinstalling it can easily deform the impeller, causing the entire machine to vibrate and affecting its performance. Range hoods with automatic cleaning functions can reduce this workload and are very convenient to use.

[0003] Most modern range hoods with cleaning functions typically incorporate a self-cleaning system within the unit to clean the impeller of the fan system. This system includes a water pump and a water intake pipe. The pump's outlet is connected to the cleaning mechanism, while the pump's inlet is connected to the water intake pipe. This pipe can either connect directly to a water cup inside the unit or be extended from the unit to draw water from an external cup. Regardless of the water intake method, over time, scale buildup can accumulate in the cleaning mechanism, significantly shortening the lifespan of the self-cleaning system. Furthermore, these types of range hoods all require automatic water cups, which can be either built-in or external. Built-in water cups take up internal space and increase the overall weight of the range hood. External water cups come in two forms: one where the cup is permanently connected to the range hood via a water pipe and placed externally. This type of external water pipe and cup are constantly exposed to the outside of the range hood, easily causing aging of the water cup and pipes, and allowing a large amount of particulate matter to enter the cleaning system, affecting the overall lifespan of the cleaning system; the other type where the cup is only filled with water during cleaning and installed in a designated location on the range hood, and is not connected when not in use. This external water cup method is inconvenient to use and the cup is easily lost. Moreover, regardless of the water dispensing method, the length of the water pipe is often quite long, which presents new problems for pipe storage. If users handle it carelessly, pipe stacking can occur, affecting the absorption effect. Therefore, the existing technology needs further improvement. Utility Model Content

[0004] The first technical problem to be solved by this utility model is to provide a range hood that can automatically retract the water suction pipe when it is not in use, in contrast to the above-mentioned prior art.

[0005] The second technical problem to be solved by this utility model is to provide a range hood that can automatically descale the clean water drawn in by the suction pipe and can also automatically retract the suction pipe, in contrast to the above-mentioned prior art.

[0006] The technical solution adopted by this utility model to solve the first technical problem mentioned above is as follows: a range hood, including a body, a water pump installed on the body, the water outlet of the water pump being connected to the cleaning mechanism of the range hood, and the water inlet of the water pump being connected to a suction pipe that can be pulled out from the body during use. The feature is that the body is also provided with a water pipe recycling mechanism that can automatically recycle and store the suction pipe.

[0007] As an improvement, the water pipe recycling mechanism includes:

[0008] A fixing plate, with wavy fixing teeth on one side;

[0009] A movable plate is arranged opposite to the fixed plate, and the side of the movable plate facing the fixed plate is also provided with wavy moving teeth; the middle part of the water suction pipe passes through the fixed plate and the movable plate;

[0010] The drive mechanism is connected to the moving plate drive and can drive the moving plate to move closer to or away from the fixed plate;

[0011] When the moving plate approaches the fixed plate under the action of the driving mechanism, the wave-shaped moving teeth on the moving plate can mesh with the wave-shaped gears on the fixed plate, so that the suction pipe is retracted between the wave-shaped moving teeth on the moving plate and the wave-shaped fixed teeth on the fixed plate in a wave-shaped bending and stacking manner; when the moving plate moves away from the fixed plate under the action of the driving mechanism, the wave-shaped moving teeth on the moving plate release the restraint on the suction pipe, and the suction pipe can be pulled out freely.

[0012] To facilitate the storage of the water pipe and prevent it from being squeezed when folded back, the outer surface of the wavy fixed tooth is provided with a water pipe groove that can accommodate the water pipe, or / and the outer surface of the wavy movable tooth is provided with a water pipe groove that can accommodate the water pipe.

[0013] The technical solution adopted by this utility model to solve the second technical problem mentioned above is as follows: the fixing plate and / or the fixing plate are provided with an electromagnetic descaling device. The electromagnetic descaling device can perform electromagnetic descaling on the cleaning water passing through the suction pipe, thereby improving the service life of the cleaning mechanism and making it less likely for scale to form inside the cleaning mechanism.

[0014] The amplitude and / or width of the wavy fixed teeth decrease sequentially from one side to the other, and correspondingly, the amplitude and / or width of the wavy movable teeth also decrease sequentially from one side to the other. This design is intended to first recycle the side with the larger amplitude and / or width between the wavy fixed teeth and the wavy movable teeth when retrieving the suction pipe, and then recycle them sequentially to avoid simultaneous tangling. In this embodiment, the side with the larger amplitude and / or width between the wavy fixed teeth and the wavy movable teeth is the side closer to the water pump. The water pipe between the water pump and the side entering this side is a fixed pipe. When retrieving the suction pipe, this part of the water pipe does not move. The remaining part between the fixed plate and the movable plate, as well as the remaining part of the water pipe that passes through the movable plate and the fixed plate, will be gradually folded and retracted under the action of the wavy movable teeth.

[0015] In a further improvement, the water pipe recycling mechanism also includes a frame, within which both the fixed plate and the movable plate are disposed.

[0016] Further improvements include a water inlet on one side of the frame that is offset from the position of the fixed plate, and a water outlet on the opposite side of the frame that is offset from the position of the fixed plate. The water inlet and outlet pass through the water inlet and the water outlet, with the middle part passing between the fixed plate and the moving plate. The water inlet located between the water pump and the water inlet on the frame is a fixed pipe.

[0017] Further improvements include the addition of a receiving plate to support the suction pipe, which extends outward from the side of the movable plate facing the fixed plate to prevent the suction pipe from falling out of the pipe groove due to gravity during retrieval. Correspondingly, the fixed plate has a receiving hole on the side facing the movable plate that allows the receiving plate to be inserted.

[0018] To further improve the ease of retracting the suction pipe, a metal spring is provided inside the suction pipe located between the fixed plate and the moving plate, and an electromagnetic coil is provided on the outer surface of the wavy fixed teeth. The metal spring can prevent the pipe from being excessively squeezed when retracting the suction pipe. On the other hand, it can also activate the electromagnetic coil when retracting to promote the return of the suction pipe to its original position.

[0019] Preferably, the drive mechanism is an electric push rod connected to the movable plate.

[0020] In a further improvement, the machine body is provided with a suction plate that communicates with the inlet of the suction pipe, and the outlet of the suction pipe is communicated with a water pump.

[0021] Further improvements include the addition of a distance sensor at the bottom of the water absorption tray.

[0022] Compared with the prior art, the advantages of this utility model are: by setting a water pipe recycling mechanism in the machine body that can automatically recycle and store the water pipe, it is convenient for users to pick up and put away the water pipe. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the range hood in this embodiment of the present invention (the water suction tray is fixed on the body and the water suction pipe is in a retracted state).

[0024] Figure 2 This is a three-dimensional structural diagram of another state of the range hood in this embodiment of the utility model (the state in which the water suction tray and part of the water suction pipe are removed from the machine body and suck water from the external water basin).

[0025] Figure 3 This is a schematic diagram showing the positions of the water pipe recycling mechanism and the automatic water dispensing mechanism within the machine body in this embodiment of the present invention.

[0026] Figure 4 This is a schematic diagram of the water pipe recycling mechanism in an embodiment of the present invention (with the water suction pipe in the unfolded state).

[0027] Figure 5 This is a schematic diagram of the water pipe recycling mechanism in an embodiment of the present invention (water pipe recycling state).

[0028] Figure 6 This is a schematic diagram of the structure of the fixing plate in an embodiment of this utility model.

[0029] Figure 7 This is a schematic diagram of the structure of the movable plate in an embodiment of this utility model.

[0030] Figure 8 This is a three-dimensional structural diagram of the automatic water-taking mechanism when the water-absorbing plate is in a clamped state in an embodiment of this utility model.

[0031] Figure 9 This is a three-dimensional structural diagram of the automatic water-collecting mechanism after the water-absorbing plate is released in an embodiment of this utility model.

[0032] Figure 10 This is an exploded perspective view of the automatic water-collecting mechanism in an embodiment of this utility model.

[0033] Figure 11 This is an internal structural diagram of the automatic water-taking mechanism when the water-absorbing plate is in a clamped state in an embodiment of this utility model.

[0034] Figure 12 This is an internal structural diagram of the automatic water intake mechanism after the water suction tray is released in an embodiment of this utility model.

[0035] Figure 13 This is a schematic diagram of the water absorption tray in an embodiment of the present invention. Detailed Implementation

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0037] like Figure 1 ,2 The range hood shown in Figure 3 includes a body A, which contains a fan system and a cleaning mechanism for cleaning the impeller of the fan system. The body also contains a water pump 1, the outlet of which is connected to the cleaning mechanism of the range hood. The inlet of the water pump 1 is connected to a suction pipe 2 that can be pulled out of the body during use. The body also contains a water pipe recycling mechanism 4 that can automatically retract and store the suction pipe 2. The side wall of the body A is also connected to an automatic water intake mechanism 3 that can be detachably connected to the body.

[0038] The water suction pipe inside the machine body is divided into two parts. One part is a water pipe connecting the water pump 1 and the water pipe recovery mechanism 4. This part of the water pipe is a fixed pipe and cannot be moved. The other part is a water suction pipe connecting the water pipe recovery mechanism 4 and the automatic water intake mechanism 3. This part of the water suction pipe can be moved. It can be pulled out of the machine body along with the water suction plate 31 in the automatic water intake mechanism 3, and it can also be recovered and gathered by the water pipe recovery mechanism 4.

[0039] In this embodiment, the water pipe recycling mechanism 4 is referred to Figures 4-7 As shown, it includes:

[0040] The fixing plate 41 has a wave-shaped fixing tooth 411 on one side;

[0041] The movable plate 42 is arranged opposite to the fixed plate 41, and the side of the movable plate 42 facing the fixed plate 41 is also provided with a wave-shaped moving tooth 421; the middle part of the water suction pipe 2 passes through the fixed plate 41 and the movable plate 42.

[0042] The drive mechanism 43 is connected to the moving plate drive 42 and can drive the moving plate 42 to move closer to or away from the fixed plate 41. In this embodiment, the drive mechanism 43 is an electric push rod connected to the moving plate.

[0043] The frame 45 is provided with the fixed plate 41 and the movable plate 42 both disposed within the frame 45; one side of the frame 45 is provided with a water inlet 451 offset from the fixed plate 41, and the other opposite side of the frame is provided with a water outlet 452 offset from the fixed plate; the water pipe 2 passes through the water inlet 451 and the water outlet 452, and its middle part passes between the fixed plate and the movable plate.

[0044] When the moving plate 42 approaches the fixed plate 41 under the action of the driving mechanism 43, the wave-shaped moving teeth 421 on the moving plate 42 can mesh with the wave-shaped gears 411 on the fixed plate 41, so that the suction pipe 2 is retracted between the wave-shaped moving teeth of the moving plate and the wave-shaped fixed teeth of the fixed plate in a wave-shaped bending and stacking manner; when the moving plate moves away from the fixed plate under the action of the driving mechanism, the wave-shaped moving teeth on the moving plate release the restraint on the suction pipe 2, and the suction pipe 2 can be pulled out freely.

[0045] In this embodiment, the outer surface of the wavy fixed tooth 411 is provided with a water pipe groove 44 that can accommodate the water suction pipe 2, and the outer surface of the wavy movable tooth 421 is provided with a water pipe groove 44 that can accommodate the water suction pipe 2. An electromagnetic descaling device 46 is provided inside the fixed plate 41. A metal spring is provided inside the water suction pipe 2 located between the fixed plate and the movable plate, and an electromagnetic coil 413 is provided on the outer surface of the wavy fixed tooth.

[0046] The movable plate 42 extends outward from the side facing the fixed plate to form a receiving plate 422 for supporting the water suction pipe. The receiving plate 422 has multiple pipes. Correspondingly, the fixed plate has receiving holes 412 on the side facing the movable plate to allow the receiving plates to be inserted. The receiving holes 412 have multiple corresponding holes.

[0047] In this embodiment, the amplitude of the wavy fixed teeth 411 gradually decreases from the water inlet 451 to the water outlet 452. Correspondingly, the amplitude of the wavy movable teeth 421 also gradually decreases from the water inlet 451 to the water outlet 452. The width of the wavy fixed teeth 411 and the width of the wavy movable teeth 421 can remain unchanged. In practice, the amplitude of the wavy fixed teeth 411 and the wavy movable teeth 421 can be kept the same, and only the width of the wavy movable teeth 421 and the wavy fixed teeth 411 can be changed to achieve the purpose of gradually retracting the folded water pipe. Of course, the amplitude and width of the wavy fixed teeth 411 and the wavy movable teeth 421 can also be changed to achieve the purpose of rapidly retracting the wavy fixed teeth 411 and the wavy movable teeth 421.

[0048] The automatic water dispensing mechanism 3 in this embodiment is shown below. Figures 8 to 13 As shown, it includes:

[0049] The suction plate 31 has a suction port 311 on its front side. The suction pipe 2, which comes out of the suction pipe outlet 452 in the water pipe recovery mechanism 4, is in liquid-sealed communication with the suction port 311 on the suction plate 31. The back of the suction plate is provided with a snap-fit ​​part 312. A water guide column 313, which communicates with the suction port 311, is formed on the back of the suction plate 31. The inlet of the suction pipe 2 is in sealed communication with the water guide column 313. The water outlet of the suction pipe 2 is connected to the water inlet of the water pump 1. A filter screen 315 is provided at the outlet of the water guide column 313. The snap-fit ​​part 312 includes a snap ball 3121 with a spherical end and a connecting column 3122 connecting the snap ball and the back of the suction plate 31.

[0050] The water suction tray recycling and placement mechanism is set on the machine body A and cooperates with the locking part 312 on the back of the water suction tray. It can lock the locking part 312 to fix the water suction tray 31 to the machine body, and can also release the locking part 312 under the action of external force to detach the water suction tray 31 from the machine body A.

[0051] In this embodiment, the water suction tray recycling and placement mechanism includes:

[0052] A mounting bracket 32 ​​is fixedly mounted on the machine body. The front side of the mounting bracket 32 ​​has an opening 321 that matches the shape of the water suction tray 31. The interior of the mounting bracket 32 ​​has a roughly box-shaped mounting box 323 that communicates with the front opening 321. A guide post 314 is also formed on the back of the water suction tray 31. The front side of the mounting bracket 32 ​​has a guide hole 322 that matches the guide post 314. There are three guide posts 314 that are spaced apart, and there are three corresponding guide holes 322.

[0053] The slider 33 is set inside the mounting box 323 inside the mounting frame 32. The outer side of the slider 33 is covered with a mounting cover 324 that is fixedly connected to the mounting box 323. The mounting box 323 is integrally formed on the mounting frame 32, and the mounting cover 324 is fixedly connected to the mounting box 323 by fasteners such as screws.

[0054] The first claw 34, the first end of the first claw 34 is rotatably connected to the slider 33 near the front opening of the mounting bracket;

[0055] The second claw 35 has its first end rotatably connected to the slider 33 near the front opening of the mounting bracket. The second claw is spaced apart from the first claw. The second ends of the first claw and the second claw are free ends and can freely enter and exit the front opening 321 of the mounting bracket 32 ​​during sliding movement. When the second ends of the first claw and the second claw approach each other, they can wrap around and clamp the locking part 312 on the water suction tray. When the second ends of the first claw and the second claw move away from each other, they can release the locking part 312 on the water suction tray.

[0056] The second end of the first claw and the second end of the second claw are both L-shaped, and their openings are arranged corresponding to each other. When the second ends of the first claw and the second ends of the second claw approach each other, a cavity is formed in the middle that can wrap around and clamp the clamping part 312 on the water absorption tray.

[0057] A first guide post 36 is provided on the outer side of the slider 33;

[0058] A second guide post 37 is provided on the other side of the slider 33;

[0059] As the slider 33 moves away from the front opening of the mounting bracket under external force, the second ends of the first claw 34 and the second claw 35 retract from the front opening of the mounting bracket into the mounting box 323 inside the mounting bracket. Under the action of the first guide post 36 and the second guide post 37 respectively, the second ends of the first claw 34 and the second claw 35 approach each other and form a cavity that can enclose and lock the locking part 312 on the suction tray. Under the action of the first guide post 36 and the second guide post 37, the second ends of the first claw 34 and the second claw 35 remain close to each other, thereby holding the suction tray 312 close to the front opening of the mounting bracket. 1. It is firmly locked onto the mounting bracket and thus fixed to the machine body; when the slider 33 moves towards the front opening of the mounting bracket under external force, the second end of the first claw 34 and the second end of the second claw 35 are respectively disengaged from the action of the first guide post 36 and the second guide post 37. At the same time, the second end of the first claw 34 and the second end of the second claw 35 extend out from the front opening of the mounting bracket, so that the second end of the first claw and the second end of the second claw can freely unfold and move away from each other, thereby releasing the locking part on the water suction plate, and then releasing the water suction plate, so that the water suction plate can be detached from the machine body and take water from the external water source.

[0060] In this embodiment, the first guide post 36 and the second guide post 37 can be replaced by two torsion springs. That is, two torsion springs, one acting on the first claw 34 and the other on the second claw 35, can be provided on the mounting frame 32. When the slider 33 moves away from the front opening of the mounting frame under the action of an external force, the second ends of the first claw 34 and the second ends of the second claw 35 retract from the front opening of the mounting frame into the mounting frame. The second ends of the first claw 34 and the second ends of the second claw 35 approach each other under the action of the edge of the front opening of the mounting frame and form a cavity that can wrap around and clamp the locking part 312 on the water absorption tray. At this time, the first torsion spring and the second torsion spring are compressed. When the slider 33 moves towards the front opening of the mounting frame under the action of an external force, the second ends of the first claw 34 and the second ends of the second claw 35 extend out from the front opening of the mounting frame. The second ends of the first claw 34 and the second ends of the second claw 35 expand away from each other under the action of the elastic restoring force of the first torsion spring and the second torsion spring, respectively.

[0061] In this embodiment, a positioning post 331 is formed on the rear side of the slider 33, and a return spring 332 is sleeved on the positioning post 331. The other side of the return spring 332 abuts against the mounting bracket 32. When the slider 33 is subjected to external force and moves away from the front opening of the mounting bracket, the return spring 332 is compressed. The return spring 332 is used to reset the slider 33, so that the slider 33 can move towards the front opening of the mounting bracket.

[0062] In addition, the above-mentioned suction tray recycling and placement mechanism also includes:

[0063] Positioning element 38, the first end of which is fixedly mounted on mounting bracket 32 ​​and fixedly connected to mounting cover 324;

[0064] A slide rail 333 is formed on the slider 33. The length direction of the slide rail 333 is set along the movement direction of the slider 33. A first concave positioning part 3331 is formed on the slide rail 333 near the front opening of the mounting bracket. A second concave positioning part 3332 is formed on the slide rail 333 away from the front opening of the mounting bracket. The second end of the positioning member 38 is positioned in the slide rail 333 and slides in cooperation with the slide rail 333. In this embodiment, the positioning member 38 is generally strip-shaped and made of steel wire. Its first end is L-shaped and fixed in the mounting cover 324. Its second end is L-shaped and slides in the slide rail 333. The first concave positioning part 3331 of the slide rail 333 is V-shaped, and the second concave positioning part 3332 is also V-shaped. The first concave positioning part 3331 and the second concave positioning part 3332 are connected by a straight slide rail groove.

[0065] When the suction tray 31 is not in operation, its back locking portion 312 is held in place by the two claws 34 and 35 of the suction tray retrieval and placement mechanism. The second end of the positioning member 38 is positioned within the first concave positioning portion 3331. When the suction tray 31 needs to be retrieved, it needs to be pressed inward. The suction tray 31 will then move the slider 33 inward. This will cause the second end of the positioning member 38 in the mounting bracket 32 ​​to disengage from the first concave positioning portion 3331 on the slider 33. Under the elastic action of the return spring 332, the slider 33 will push the suction tray out along with the slider and the two claws. After the two claws extend from the front opening of the mounting bracket, the second ends of the two claws can... The water suction tray can be freely unfolded and moved away from each other, allowing it to be removed and moved to a water source outside the machine to absorb water. At this time, the second end of the positioning member 38 is positioned in the second concave positioning part 3332. When installing the water suction tray, the clamping part of the water suction tray is placed in the two clamping claws, and under the guidance of the guide post 314 on the back of the water suction tray, the guide post 314 is engaged in the guide hole 322. As the water suction tray is pushed in, the second end of the positioning member 38 will move along the slide rail 333. When the water suction tray is pressed to the bottom, the second end of the positioning member 38 will be locked in the first concave positioning part 3331, thus locking the water suction tray 31. The water suction tray integrates a filter screen to filter impurities and particles.

[0066] The principle of the suction tube recycling mechanism is as follows: when the user needs to start the cleaning mechanism, the drive mechanism 43, which is an electric push rod, will drive the moving plate to move away from the fixed plate. The wave-shaped moving teeth on the moving plate will gradually release the restraint on the suction tube 2, and then release the bent and stacked water tube. Then, the user can take out the suction tray 31 with the suction tube 2 and put it in the vegetable washing tray or other container that can hold water. After cleaning, the drive mechanism 43, which acts as an electric push rod, moves the moving plate toward the fixed plate. Since the suction pipe before the suction pipe inlet in the water pipe recovery mechanism 4 is fixed, and the arrangement of the wavy fixed teeth and wavy moving teeth decreases from left to right, the suction pipe is recovered from the left side, gradually retracting all the drooping suction pipe. To prevent the suction pipe from falling out during recovery due to gravity, the receiving plate on the moving plate can support the suction pipe and promote its entry into the water pipe groove. Since a steel spring is placed inside the water pipe, it can prevent excessive squeezing of the water pipe during recovery and can also activate the electromagnetic coil during recovery to promote the return of the suction pipe to its original position. Then, the user pushes the suction plate 31 into the suction plate recovery and placement mechanism and fixes it, thus completing the cleaning process.

[0067] In addition, a distance sensor can be installed on the outer surface of the suction tray 31. When the suction tray 31 is removed, the distance sensor detects the distance between the suction tray and the water basin. Then, the suction pipe that can be released under different wave-shaped moving tooth gaps on the moving plate is calculated. The appropriate length of suction pipe is released by adjusting the electric push rod to avoid the water pipe being too long or the water pipe being stacked in the water pipe recycling structure.

Claims

1. A range hood with an automatic water intake structure, comprising a body (A), a water pump (1) mounted on the body (A), the outlet of the water pump (1) being connected to a cleaning mechanism of the range hood, and the inlet of the water pump (1) being connected to a suction pipe (2) that can be drawn out of the body during use, characterized in that: The machine body is also provided with a water pipe recycling mechanism (4) capable of automatically recycling and storing the water pipe.

2. The hood according to claim 1, characterized in that: The water pipe recycling mechanism (4) comprises: A fixed plate (41) provided with wave-shaped fixed teeth (411) on one side; A moving plate (42) provided opposite to the fixed plate, and also provided with wave-shaped moving teeth (421) on the side facing the fixed plate; the middle part of the water pipe (2) is arranged between the fixed plate (41) and the moving plate (42); A driving mechanism (43) drivingly connected with the moving plate (42) and capable of driving the moving plate (42) to move close to or away from the fixed plate (41); When the moving plate moves close to the fixed plate under the action of the driving mechanism, the wave-shaped moving teeth on the moving plate can engage with the wave-shaped fixed teeth on the fixed plate, so that the water pipe (2) is recycled in a wave-shaped curved and stacked manner between the wave-shaped moving teeth of the moving plate and the wave-shaped fixed teeth of the fixed plate; when the moving plate moves away from the fixed plate under the action of the driving mechanism, the wave-shaped moving teeth on the moving plate release the constraint on the water pipe (2), and the water pipe (2) can be freely pulled out.

3. The hood according to claim 2, characterized in that: The outer surface of the wave-shaped fixed teeth (411) is provided with a water pipe groove (44) capable of accommodating the water pipe (2), or / and the outer surface of the wave-shaped moving teeth (421) is provided with a water pipe groove capable of accommodating the water pipe (2).

4. The hood according to claim 2, characterized in that: The fixed plate (41) or / and the moving plate (42) is provided with an electromagnetic descaling device.

5. The hood according to claim 2, characterized in that: The amplitude or / and width of the wave-shaped fixed teeth (411) gradually decreases from one side to the other side, and correspondingly, the amplitude or / and width of the wave-shaped moving teeth (421) also gradually decreases from one side to the other side.

6. The hood according to claim 2, characterized in that: The water pipe recycling mechanism further comprises a frame (45), and the fixed plate (41) and the moving plate (42) are arranged in the frame (45).

7. The hood according to claim 6, characterized in that: One side of the frame (45) is provided with a water pipe inlet (451) staggered with the position of the fixed plate, and the other opposite side of the frame is provided with a water pipe outlet (452) staggered with the position of the fixed plate, and the water pipe (2) passes through the water pipe inlet and the water pipe outlet, and the middle part is arranged between the fixed plate and the moving plate.

8. The hood according to claim 2, characterized in that: The side of the moving plate (42) facing the fixed plate extends outwardly and has a supporting plate (422) for supporting the water pipe, and correspondingly, the fixed plate is provided with a supporting hole (412) allowing the supporting plate to be inserted on the side facing the moving plate.

9. The hood according to claim 2, characterized in that: The water pipe (2) is provided with a metal spring inside between the fixed plate and the moving plate, and the outer surface of the wave-shaped fixed teeth is provided with an electromagnetic coil (413).

10. The hood according to claim 2, characterized in that: The driving mechanism (43) is an electric push rod connected with the moving plate.

11. The hood according to claim 1, characterized in that: The machine body is provided with a water suction disc (31) communicating with the inlet of the water pipe (2), and the outlet of the water pipe (2) communicates with the water pump (1).

12. The hood according to claim 11, characterized in that: The outer surface of the water suction disc (31) is provided with a distance sensor.

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