CN220045625U

CN220045625U - Automatic liquid supply system of cooking utensil

Info

Publication number: CN220045625U
Application number: CN202320951081.8U
Authority: CN
Inventors: 曾力群
Original assignee: Dongguan Chanya Technology Co ltd
Current assignee: Dongguan Chanya Technology Co ltd
Priority date: 2023-04-25
Filing date: 2023-04-25
Publication date: 2023-11-21
Anticipated expiration: 2033-04-25

Abstract

The automatic liquid supply system of the cooking utensil comprises a cooker body and a cover body hinged on the cooker body, wherein a fixed plate for supporting a pot liner is fixedly arranged on the cooker body, a supporting seat and a storage bottle inserted on the supporting seat are fixedly arranged in the cooker body, and the storage bottle is in through connection with the supporting seat; the storage bottle is characterized in that a bottle cap is connected to the outlet of the storage bottle in a threaded mode, a closing component for preventing liquid from flowing out through the bottle cap is arranged in the bottle cap, an opening component for opening the closing component is arranged in the supporting seat, and liquid cannot flow out of the bottle cap when the storage bottle is inverted through the arrangement of the closing component in the bottle cap. When the storage bottle is reversely inserted into the supporting seat, the opening assembly in the supporting seat is abutted with the closing assembly, so that the closing assembly is opened, and water in the storage bottle is introduced into the supporting seat.

Description

Automatic liquid supply system of cooking utensil

Technical Field

The utility model relates to the field of cooking appliances, in particular to an automatic liquid supply system of a cooking appliance.

Background

The electric cooker is a modern cooker which can cook food, can automatically preserve heat, is clean and sanitary, and has no pollution, and the control mode of the electric cooker sold in the market at present mainly comprises; mechanical heat preservation electric cooker: the rice cooker has no automatic rice washing function, rice is washed manually before cooking, water is prepared, a rice cooking switch is pressed down to cook rice, and the rice is automatically kept in a heat preservation state after cooking; appointment starting heat preservation type electric rice cooker: the automatic rice washing function is not provided, the rice is washed manually before cooking, the water is prepared, the reserved cooking time is set, the rice is automatically put into a cooking state after the timing time is up, and the heat is automatically preserved after the rice is cooked; remote-control heat-preservation type automatic electric cooker: the electric rice cooker is controlled remotely by utilizing WI F I or mobile phone APP, the electric rice cooker is controlled by a microcomputer in a program, the working automation degree of the electric rice cooker is higher, but rice is still needed to be manually put into the cooker before cooking, and a cooking instruction is waited for. When the automatic water supply is carried out for the electric rice cooker in the prior art, an empty storage bottle is usually placed on the electric rice cooker, and then water is added from the storage bottle. When the electric cooker is used, the storage bottle can be detached from the electric cooker after the water in the storage bottle is completely used. Disassembly when there is water in the storage bottle can invert the water in the storage bottle to flow out from the bottom.

Disclosure of Invention

In order to solve the above problems, the present utility model provides an automatic liquid supply system for a cooking appliance in which a storage bottle is inverted to prevent liquid from flowing out of a bottle cap.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the automatic liquid supply system of the cooking utensil comprises a cooker body and a cover body hinged on the cooker body, wherein a fixed plate for supporting a pot liner is fixedly arranged on the cooker body, a supporting seat and a storage bottle inserted on the supporting seat are fixedly arranged in the cooker body, and the storage bottle is in through connection with the supporting seat; the storage bottle is characterized in that a bottle cap is connected to the outlet of the storage bottle in a threaded mode, a closing assembly for preventing liquid from flowing out through the bottle cap is arranged in the bottle cap, and an opening assembly for opening the closing assembly is arranged in the supporting seat.

As a preferable mode of the utility model, the closing component comprises a sliding hole arranged in the center of the bottle cap, a closing column is arranged in the sliding hole in a sliding way, one end of the closing column is positioned outside and inside the bottle cap, the other end of the closing column extends to the outer side of the bottle cap, one end of the closing column positioned inside the bottle cap is provided with a mounting groove, and an umbrella-shaped closing plate is arranged in the mounting groove; the one end that the closed post is located the bottle lid outside is gone up the cover and is equipped with the third spring, the one end of third spring with the bottom butt of closed post, the other end with the outside butt of bottle lid.

As preferable, a second sealing groove is arranged on the side wall of the mounting groove, and a second sealing ring is arranged in the second sealing groove; the bottle cap is provided with a liquid outlet pipe which is coaxial with the sliding hole and is integrally formed, a liquid outlet channel is arranged in the liquid outlet pipe, and the third spring is positioned in the liquid outlet channel.

As a preferred mode of the utility model, the opening assembly comprises a limit post arranged at the center of the support seat and an isolation tube coaxially arranged with the limit post, a temporary storage cavity is arranged between the isolation tube and the limit post, a liquid outlet joint which is in through connection with the temporary storage cavity is arranged at the bottom of the support seat, a hollow support ring is arranged in the temporary storage cavity in a sliding manner, and the support ring is elastically connected with the limit post; an opening rod coupled with the closing component is connected in a sliding manner in the supporting ring.

As the preferred utility model, the opening rod comprises a connecting section which is connected in a sliding way in the supporting ring, one end of the connecting section is integrally formed with a supporting rod, the other end of the connecting section is integrally formed with a top plate, the supporting rod is positioned in the supporting ring and is connected with the limiting column in a coupling way, and the top plate is positioned outside the supporting ring and is connected with the closing column of the closing assembly in a coupling way.

As preferable in the utility model, at least one guide groove is arranged on the side wall of the temporary storage cavity, and the guide groove is formed by two guide plates; the support ring is provided with a guide block matched with the guide groove.

As the preferable mode of the utility model, the top of the isolation tube is clamped with the sealing cover, the middle part of the sealing cover is provided with the through hole for the top plate to pass through, the outer circumference of the isolation tube is uniformly distributed with three clamping bosses, and the sealing cover is provided with clamping holes matched with the clamping bosses.

As the preferred one of the utility model, the bottle cap is internally provided with the air inlet component, the air inlet component comprises an air inlet seat integrally formed with the bottle cap, an air inlet cavity is arranged in the air inlet seat, two air inlet holes communicated with the air inlet cavity are arranged at the top of the air inlet seat, sealing rods are slidably connected in the air inlet holes, the other ends of the two sealing rods are fixedly connected through connecting plates, first springs are sleeved on the two sealing rods, one ends of the first springs are fixedly connected with the connecting plates, the other ends of the first springs are fixedly connected with the top wall of the air inlet cavity, the first springs and the connecting plates are both positioned in the air inlet cavity, the other ends of the first springs extend out of the air inlet seat and are provided with first sealing grooves, and first sealing rings are arranged in the first sealing grooves and are coupled with the top of the air inlet seat.

As preferable in the utility model, the bottle cap is integrally formed with a connecting pipe, and the connecting pipe and the liquid outlet pipe are coaxially arranged and form an air inlet channel.

As preferable, the support seat is also provided with a support tube coaxially arranged with the isolation tube, an air inlet chamber communicated with the air inlet channel is arranged between the support tube and the isolation tube, a cleaning cover is buckled on the support tube, the center of the cleaning cover is provided with a mounting hole for accommodating the sealing cover, and a gap for the connecting tube to pass through is arranged between the side wall of the mounting hole and the outer circumference of the sealing cover; the bottom of the supporting seat is provided with an air inlet joint communicated with the air inlet chamber.

The utility model has the beneficial effects that: by providing a closure assembly within the closure, liquid cannot flow out of the closure when the storage bottle is inverted. When the storage bottle is reversely inserted into the supporting seat, the opening assembly in the supporting seat is abutted with the closing assembly, so that the closing assembly is opened, and water in the storage bottle is introduced into the supporting seat.

Drawings

Fig. 1 is a cross-sectional view of the present utility model.

Fig. 2 is a schematic perspective view of the present utility model.

Figure 3 is a cross-sectional view of a closure assembly of the present utility model.

Fig. 4 is a cross-sectional view of an opening assembly of the present utility model.

Fig. 5 is a cross-sectional view of an air intake assembly of the present utility model.

Fig. 6 is a schematic perspective view of the electric cooker of the utility model.

Reference numerals illustrate: 1. a pot body; 2. a cover body; 3. the device comprises a controller, a fixing plate, a storage bottle, an air inlet assembly, a liquid outlet channel and a closing assembly. 11. The valve assembly includes a connecting tube, 12, an intake passage, 13, a drain pipe, 14, a purge cap, 15, a drain fitting, 16, an intake chamber, 17, an intake fitting, 18, a support tube, 19, a cap, 20, a first seal ring, 21, a first seal groove, 22, a seal rod, 23, a first spring, 24, an intake chamber, 25, a connecting plate, 26, an intake port, 27, an opening assembly, 28, a spacer tube, 29, a temporary storage chamber, 30, a snap-in boss, 31, a top plate, 32, a connecting section, 33, a support rod, 34, a sliding hole, 35, a support ring, 36, a second spring, 37, a retainer post, 38, a support seat, 39, a closure post, 40, a third spring, 41, a closure plate, 42, a second seal groove, 43, a mounting groove, 44, a guide block, 45, a guide plate, 46, a closure, 47, a snap-in hole, 48, and an intake seat.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

The utility model relates to an automatic liquid supply system of a cooking appliance, which can be an electric cooker, an electric pressure cooker, a cooking machine, a soymilk machine, an electric stewpot or other electric heating appliances. The liquid automatic supply system can automatically add food in other fluids such as water, scalding and the like into the cooking utensil. Meanwhile, the liquid automatic supply system can not only realize that liquid can not flow out when the automatic supply system is in an inverted state, but also keep the air pressure balance inside and outside the supply system and keep smooth supply when the automatic supply system works. The following description of the preferred embodiment will be made with reference to fig. 1 to 6, using the automatic feeding system in an electric rice cooker as an example.

The cooking utensil comprises a cooker body 1 and a cover body 2 hinged on the cooker body 1, wherein a cooker liner for cooking food is arranged in the cooker body 1, a fixed plate 4 for supporting the cooker liner and a heating device for heating the cooker liner are fixedly arranged on the cooker body 1, the heating device can be an electric heating plate or other prior art, and a controller 3 for controlling an automatic supply system to start and stop is arranged on the cover body 2.

Referring to fig. 1-2, the automatic liquid supply system includes a support base 38 fixedly installed in the pot body 1 and a storage bottle 7 inserted on the support base 38, wherein the storage bottle 7 is connected with the support base 38. The outlet of the storage bottle 7 is connected with a bottle cap 19 in a threaded manner, a closing component 10 for preventing liquid in the storage bottle 7 from overflowing to the outside of the storage bottle 7 through the bottle cap 19 in an inverted state is arranged in the bottle cap 19, and an opening component 27 for opening the closing component 10 is arranged in a supporting seat 38. During the insertion of the storage bottle 7 in the support seat 38, the storage bottle 7 needs to be inverted, so that the bottle cap 19 is positioned below the storage bottle 7, and therefore, the closure assembly 10 is arranged in the bottle cap 19, and the liquid cannot flow out of the bottle cap 19 when the storage bottle 7 is inverted. When the storage bottle 7 is reversely inserted into the supporting seat 38, the opening assembly 27 in the supporting seat 38 is abutted with the closing assembly 10, so that the closing assembly 10 is opened, and water in the storage bottle 7 is introduced into the supporting seat 38. The liquid in the supporting seat 38 is lifted into the pot liner by the water pump. Forming an automatic supply of liquid. The water pump is arranged in the pot body 1 and is positioned at one side of the storage bottle 7.

Referring to fig. 1-3, the closure assembly 10 includes a sliding hole 34 disposed in the center of the bottle cap 19, a closing post 39 is slidably disposed in the sliding hole 34, one end of the closing post 39 is located outside the bottle cap 19, the other end extends to the outside of the bottle cap 19, a mounting groove 43 is disposed at one end of the closing post 39 located inside the bottle cap 19, and an umbrella-shaped closing plate 41 is mounted in the mounting groove 43; a third spring 40 is sleeved on one end of the closing column 39, which is positioned on the outer side of the bottle cap 19, one end of the third spring 40 is abutted with the bottom of the closing column 39, and the other end is abutted with the outer side of the bottle cap 19. The third spring 40 is in an extended state in a normal state, and the closing plate 41 moves toward the bottom of the bottle cap 19 under the action of the third spring 40 and abuts against the bottom of the bottle cap 19 to completely close the sliding hole 34. The liquid cannot flow out of the slide hole 34 in the inverted state of the storage bottle 7.

In order to further improve the sealability between the sealing plate and the mounting groove 43, a second sealing groove 42 is provided on the side wall of the mounting groove 43, and a second sealing ring is provided in the second sealing groove 42, and one half of the second sealing ring is positioned in the second sealing groove 42 and the other half is abutted against the sealing plate 41. Thereby improving sealability between the sealing plate and the mounting groove 43.

The bottle cap 19 is provided with a liquid outlet pipe 13 which is coaxial with the sliding hole 34 and is integrally formed, a liquid outlet channel 9 is arranged in the liquid outlet pipe 13, and a third spring 40 is positioned in the liquid outlet pipe 13.

Referring to fig. 1-4, the opening assembly 27 includes a limiting post 37 disposed at a central position of a supporting seat 38, and an isolating tube 28 coaxially disposed with the limiting post 37, a temporary storage cavity 29 is disposed between the isolating tube 28 and the limiting post 37, a hollow supporting ring 35 is slidably disposed in the temporary storage cavity 29, and the supporting ring 35 is elastically connected with the limiting post 37 through a second spring 36. One end of the second spring 36 is fixedly connected with the ground of the support ring 35, the other end of the second spring is sleeved on the limit post 37, an opening rod is slidably connected in the support ring 35, the opening rod comprises a connecting section 32 slidably connected in the support ring 35, one end of the connecting section 32 is integrally formed with a support rod 33, the other end of the connecting section 32 is integrally formed with a top plate 31, the support rod 33 is positioned in the support ring 35 and is coupled with the limit post 37, and the top plate 31 is positioned outside the support ring 35 and is coupled with a closing post 39 of the closing assembly 10. In a normal state, the supporting ring 35 moves upwards under the action of the second spring 36, so that the top of the supporting ring 35 contacts with the bottom surface of the top cover, the top plate 31 is at the highest position, when the storage bottle 7 is inserted into the supporting seat 38, the liquid outlet pipe 13 is positioned in the temporary storage cavity 29, and the top plate 31 contacts with the bottom of the closing column 39 of the closing assembly 10. The top plate 31 and the support ring 35 are simultaneously moved downward by the water in the storage bottle 7. When the support rod 33 abuts against the limit post 37. The top plate 31 cannot move, and the storage bottle 7 continues to move downwards, at this time, the top plate 31 pushes the closing column 39 to move into the storage bottle 7, so that the closing plate 41 is separated from the ground of the bottle cap 19, and the liquid in the storage bottle 7 enters and exits into the liquid outlet pipe 13 from the sliding hole 34, and then enters into the temporary storage cavity 29. After the liquid outlet pipe 13 abuts against the supporting ring 35, the bottom of the supporting ring 35 abuts against the limiting post 37, and then the storage bottle 7 stops moving downwards, and at this time, the sliding holes 34 are all opened. The liquid outlet joint 15 communicated with the temporary storage cavity 29 chamber is arranged on one side of the supporting seat 38. And is connected between the water pump and the liquid outlet joint 15 through a pipeline. The liquid in the temporary storage chamber 29 is pumped away.

At least one guide groove is provided on the side wall of the temporary storage chamber 29, and the guide groove is formed by two inwardly extending guide plates 45. The support ring 35 is provided with guide blocks 44 which fit into the guide grooves. Three guide grooves are formed in the side wall of the temporary storage cavity 29 to improve the stability of the support ring 35 moving up and down in the isolation tube 28.

In order to prevent the supporting ring 35 from sliding out of the temporary storage cavity 29 under the action of the second spring 36, a sealing cover 46 is clamped at the top of the isolation tube 28, a through hole for the top plate 31 to pass through is formed in the middle of the sealing cover 46, three clamping bosses 30 are uniformly distributed on the outer circumference of the isolation tube 28, and clamping holes 47 matched with the clamping bosses 30 are formed in the sealing cover 46.

Referring to fig. 1-6, an air intake assembly 8 is disposed in a bottle cap 19, the air intake assembly 8 includes an air intake seat 48 integrally formed with the bottle cap 19, an air intake cavity 24 is disposed in the air intake seat 48, two air intake holes 26 penetrating through the air intake seat 24 are disposed at the top of the air intake seat 48, sealing rods 22 are slidably connected in the air intake holes 26, the other ends of the two sealing rods 22 are fixedly connected through a connecting plate 25, a first spring 23 is sleeved on the two sealing rods 22, one end of the first spring 23 is fixedly connected with the connecting plate 25, the other end of the first spring is fixedly connected with the top wall of the air intake cavity 24, the first spring 23 and the connecting plate 25 are both disposed in the air intake cavity 24, the other end extends out of the air intake seat 48 and is provided with a first sealing groove 21, a first sealing ring 20 is disposed in the first sealing groove 21, the first sealing ring 20 is coupled with the top of the air intake seat 48, when the connecting plate 25 is subjected to an upward external force, the sealing rods 22 move upward to release the sealing of the first sealing ring 20 on the air intake holes 26, and when the connecting plate 25 is not subjected to the action of the force, the sealing rods 22 move downward under the action of the first spring 23 to seal the air intake holes 20. While also avoiding the liquid from flowing out of the air inlet aperture 26 in the inverted state of the storage bottle 7. In order to ensure that the water pump is in operation, the air intake assembly 8 is in an open condition when the storage bottle 7 is inserted in the support seat 38. The isolation pipe 28 pushes the connecting plate 25 to move into the storage bottle 7, the first sealing ring 20 is separated from the air inlet hole 26, so that the air inlet hole 26 is opened, air can enter the storage bottle 7 through the air inlet hole 26 while water is discharged, and the air pressure balance inside and outside the storage bottle is ensured. The opening assembly 27 simultaneously opens simultaneously to the closing assembly 10 at the same time as the intake assembly 8 is opened.

In order to provide a separate air intake space for the air intake assembly 8, a connecting tube 11 is integrally formed on the bottle cap 19, and the connecting tube 11 is coaxially disposed with the liquid outlet tube 13 and forms an air intake passage 12.

The supporting seat 38 is also provided with a supporting tube 18 coaxially arranged with the isolating tube 28, an air inlet chamber 16 communicated with the air inlet channel 12 is arranged between the supporting tube 18 and the isolating tube 28, the supporting tube 18 is provided with a cleaning cover 14 in a buckling manner, the center of the cleaning cover 14 is provided with a mounting hole for accommodating the sealing cover 46, and a gap for the connecting tube 11 to pass through is arranged between the side wall of the mounting hole and the outer circumference of the sealing cover 46. The bottom of the supporting seat 38 is provided with an air inlet joint 17 communicated with the air inlet chamber 16; the air inlet joint 17 is connected with a one-way valve; in use, the connecting tube 11 is inserted into the intake chamber 16 through a slit to connect the intake chamber 16 and the intake passage 12. When the storage bottle is inserted, the air inlet channel and the water outlet channel are opened, and the water pump can generate negative pressure in the water bottle when pumping water, so that external air is led to enter through the air inlet connector 17, the air inlet connector 17 is connected with a one-way valve, and water cannot flow out of the air inlet connector.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "one side," "top," "inner," "front," "center," "both ends," etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.

The above embodiments are merely illustrative of the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications and improvements made by those skilled in the art to the technical solution of the present utility model should fall within the scope of protection defined by the claims of the present utility model without departing from the spirit of the design of the present utility model.

Claims

1. The automatic liquid supply system of the cooking utensil comprises a cooker body and a cover body hinged on the cooker body, wherein a fixed plate is fixedly arranged on the cooker body; the storage bottle is characterized in that a bottle cap is connected to the outlet of the storage bottle in a threaded mode, a closing assembly for preventing liquid from flowing out through the bottle cap is arranged in the bottle cap, and an opening assembly for opening the closing assembly is arranged in the supporting seat.

2. The automatic liquid supply system of a cooking appliance according to claim 1, wherein: the closing assembly comprises a sliding hole arranged in the center of the bottle cap, a closing column is arranged in the sliding hole in a sliding way, one end of the closing column is positioned outside and inside the bottle cap, the other end of the closing column extends to the outer side of the bottle cap, one end of the closing column positioned inside the bottle cap is provided with a mounting groove, and an umbrella-shaped closing plate is arranged in the mounting groove; the one end that the closed post is located the bottle lid outside is gone up the cover and is equipped with the third spring, the one end of third spring with the bottom butt of closed post, the other end with the outside butt of bottle lid.

3. The automatic liquid supply system of a cooking appliance according to claim 2, wherein: a second sealing groove is formed in the side wall of the mounting groove, and a second sealing ring is arranged in the second sealing groove; the bottle cap is provided with a liquid outlet pipe which is coaxial with the sliding hole and is integrally formed, and a liquid outlet channel is arranged in the liquid outlet pipe.

4. The automatic liquid supply system of a cooking appliance according to claim 1, wherein: the opening assembly comprises a limit column arranged at the center of the supporting seat and an isolation tube coaxially arranged with the limit column, a temporary storage cavity is arranged between the isolation tube and the limit column, a liquid outlet joint which is in through connection with the temporary storage cavity is arranged at the bottom of the supporting seat, a hollow supporting ring is arranged in the temporary storage cavity in a sliding manner, and the supporting ring is elastically connected with the limit column; an opening rod coupled with the closing component is connected in a sliding manner in the supporting ring.

5. The automatic liquid supply system of a cooking appliance according to claim 4, wherein: the opening rod comprises a connecting section which is slidably connected in the supporting ring, one end of the connecting section is integrally formed with a supporting rod, the other end of the connecting section is integrally formed with a top plate, the supporting rod is positioned in the supporting ring and is connected with the limiting column in a coupling way, and the top plate is positioned outside the supporting ring and is connected with the closing column of the closing assembly in a coupling way.

6. The automatic liquid supply system of a cooking appliance according to claim 5, wherein: the side wall of the temporary storage cavity is at least provided with a guide groove, and the guide groove is formed by two guide plates; the support ring is provided with a guide block matched with the guide groove.

7. The automatic liquid supply system of a cooking appliance according to claim 6, wherein: the top joint of isolation tube has the closing cap, the middle part of closing cap is equipped with the through-hole that supplies the roof to pass through, the equipartition has three joint boss on the outer circumference of isolation tube, is provided with the joint hole with joint boss adaptation on the closing cap.

8. The automatic liquid supply system of a cooking appliance according to claim 7, wherein: the bottle cap is internally provided with an air inlet assembly, the air inlet assembly comprises an air inlet seat integrally formed with the bottle cap, an air inlet cavity is formed in the air inlet seat, two air inlet holes communicated with the air inlet cavity are formed in the top of the air inlet seat, sealing rods are connected in the air inlet holes in a sliding mode, the other ends of the two sealing rods are fixedly connected through connecting plates, first springs are sleeved on the two sealing rods, one ends of the first springs are fixedly connected with the connecting plates, the other ends of the first springs are fixedly connected with the top wall of the air inlet cavity, the first springs and the connecting plates are located in the air inlet cavity, the other ends of the first springs extend out of the air inlet seat and are provided with first sealing grooves, and first sealing rings are arranged in the first sealing grooves and are connected with the top of the air inlet seat in a coupling mode.

9. The automatic liquid supply system of a cooking appliance according to claim 8, wherein: the bottle cap is integrally provided with a connecting pipe, and the connecting pipe and the liquid outlet pipe are coaxially arranged and form an air inlet channel.

10. The automatic liquid supply system of a cooking appliance according to claim 9, wherein: the support seat is also provided with a support tube coaxially arranged with the isolation tube, an air inlet chamber which is in through connection with the air inlet channel is arranged between the support tube and the isolation tube, a cleaning cover is buckled on the support tube, the center of the cleaning cover is provided with a mounting hole for accommodating the sealing cover, and a gap for the connecting tube to pass through is arranged between the side wall of the mounting hole and the outer circumference of the sealing cover; the bottom of the supporting seat is provided with an air inlet joint communicated with the air inlet chamber, and the air inlet joint is connected with a one-way valve.