WO2022100537A1

WO2022100537A1 - Clothes washing machine and control method thereof

Info

Publication number: WO2022100537A1
Application number: PCT/CN2021/129204
Authority: WO
Inventors: 刘庆; 杨乐; 吴建新; 邢福涛
Original assignee: 青岛海尔洗衣机有限公司; 海尔智家股份有限公司
Priority date: 2020-11-13
Filing date: 2021-11-08
Publication date: 2022-05-19
Also published as: CN114561780A

Abstract

Provided by the present invention are a clothes washing machine and control method thereof, the clothes washing machine comprising: an inner drum, a water drainage port being arranged at the bottom of the inner drum; an inner-drum sealing mechanism, mounted on the water drainage port so as to keep it in a normally closed state, such that the inner drum can hold washing water independently; and a seal drive mechanism, comprising a drive member and a transmission component, said transmission component converting the power output of the drive member into reciprocating motion in the direction of the center axis of the inner drum so as to drive the inner-drum sealing mechanism to open/close the water drainage port. The seal drive mechanism of the clothes washing machine of the present invention has stable transmission, the inner-drum sealing mechanism can be driven to open/close the water drainage port, and the drive process of the drive member of the seal drive mechanism is adjustable, thus it is possible to control the size of the opening of the inner-drum sealing mechanism according to the water drainage volume, achieving control of the water drainage process, increasing the efficiency of water drainage, and avoiding overflow.

Description

A washing machine and its control method

technical field

The present invention relates to the technical field of laundry equipment, in particular, to a washing machine and a control method thereof.

Background technique

As a household appliance, washing machine has gradually become an indispensable part of people's life, and as a main type of washing machine, fully automatic washing machine has an increasingly wide range of applications. The structure of the existing fully automatic washing machine includes two parts: an inner barrel and an outer barrel. The inner and outer barrels are connected. When the washing machine is working, the area between the inner and outer barrels is filled with water, and the inner and outer barrels are filled with water. Areas can become attached to dirt and lint from the water, which can develop bacteria and odors over time. Moreover, the water in the area between the inner and outer tubs is not used during the washing process, resulting in a waste of this part of the washing water.

In view of the above problems, the Chinese patent application with the application number CN201811359078.7 discloses a water sealing device for a washing machine and the washing machine. The washing machine includes an inner tub with a drainage hole at the bottom of the inner tub, and the water sealing device is arranged at the drainage hole. The drainage hole is blocked, and the water sealing device includes a support part fixedly connected with the inner tub and a water sealing cover that can slide relatively with the support part, an elastic part is arranged between the support part and the water sealing cover, and the elastic part is used for For the reset of the water sealing cover, the water sealing device further includes a water blocking structure, and the water blocking structure prevents the water in the inner tub from contacting the elastic member when the water sealing device is pushed open. The inner tub is used to hold water and can rotate during the washing process, which provides power for cleaning clothes and avoids bacterial contamination caused by residual sewage. Corrosion will affect the reset of the water sealing cover; by setting up pipelines around the ejector rod, the direct measurement of the water level in the inner barrel is realized, and the result is more accurate.

However, the above structure has the following problems: after the positioning device locks the inner barrel, the inertial inner barrel presses the locking rod of the positioning device, so that the ejector rod is easily deflected or stuck at the bottom of the inner barrel, resulting in abnormal drainage and alarming. In addition, if it is used in a structure without an outer tub, the edge of the water collecting device for collecting the washing water discharged from the inner tub is relatively low, the drainage is too fast, and the water level rises and overflows easily.

In view of this, the present invention is proposed.

SUMMARY OF THE INVENTION

The first purpose of the invention of the present invention provides a kind of washing machine that does not have the phenomenon of top bar top deviation or stuck inner barrel in the washing process, specifically, the following technical scheme has been adopted:

A washing machine comprising:

The inner barrel, the bottom of the inner barrel is provided with a drainage outlet;

The inner barrel sealing mechanism is installed on the drain port to keep it in a normally closed state, so that the inner barrel can independently hold washing water;

and a sealing driving mechanism, including a driving member and a transmission assembly, the transmission assembly converts the power output of the driving member into reciprocating motion along the central axis of the inner tub to drive the inner tub sealing mechanism to open/close the water outlet.

Further, the washing machine also includes a water collecting device, the water collecting device includes a water collecting bottom wall located below the bottom of the inner tub and a water collecting peripheral wall surrounding the water collecting bottom wall, and the water collecting bottom wall and the water collecting peripheral wall are jointly enclosed by the water collecting bottom wall. A water collecting chamber that discharges washing water from the drain port of the collecting inner tub;

The driving member is installed on the water collecting peripheral wall.

Further, the driving member has a rotary output shaft, and the transmission assembly includes a transmission gear mounted on the rotary output shaft, a transmission rack meshed with the transmission gear and a pull rod fixed with the transmission rack;

The rotary output of the rotary output shaft is converted into the reciprocating motion of the pull rod along the central axis direction of the inner tub through the transmission gear and the transmission rack to drive the inner tub sealing mechanism to open/close the water outlet.

Further, the inner barrel sealing mechanism includes a sealing component and an elastic component for keeping the sealing component to block the drain, and the pull rod acts on the sealing component to drive it to overcome the elastic force of the elastic component to open the drain.

Further, the sealing component includes a valve plug, a valve plug seat and a driving rod, the valve plug is installed on the valve plug seat, and the elastic component acts on the valve plug seat to keep the valve plug blocking the drain port, and the inner barrel is The bottom is provided with a bracket, the middle part of the driving rod is rotatably mounted on the bracket, one end of the driving rod is connected to the valve plug seat, and the other end is used for matching with the pulling rod.

Further, the pull rod includes a first pull rod arm extending along the direction of the central axis of the inner barrel and a second pull rod arm with one end connected to the first pull rod arm and the other end extending toward the drive rod, the second pull rod arm being located on the drive rod. Below, when the pull rod moves upward along the direction of the central axis of the inner tub, the second pull rod arm acts on the drive rod to drive the valve plug to overcome the downward movement of the elastic component to open the water outlet.

Further, the elastic component includes a support and a compression spring, the support is fixedly arranged outside the bottom of the inner tub, one end of the compression spring stops on the support, and the other end stops on the sealing assembly ;

Preferably, the barrel bottom of the inner barrel includes a barrel bottom body and a barrel bottom flange installed at the lower part of the barrel bottom body, the drain port is opened on the barrel bottom body, and the barrel bottom flange corresponds to the drain port. An installation opening for the sealing assembly is provided at the position, and the support is installed on the installation opening.

Further, a first water level detection device and a second water level detection device for detecting the water level in the water collecting chamber are arranged in the water collecting device, the first water level detecting device detects the upper limit water level in the water collecting device, and the first water level detecting device detects the upper limit water level in the water collecting device. The second water level detection device detects the lower limit water level in the water collecting device.

The second purpose of the present invention is to provide a control method for a washing machine, specifically, the following technical solutions are adopted:

A control method of a washing machine, the washing machine controls the operation of a driving member, and the transmission component converts the power output of the driving member into a reciprocating motion along the central axis direction of an inner tub to drive a sealing mechanism of the inner tub to open/close a water outlet;

Preferably, the washing machine further includes a positioning device, the washing machine controls the positioning device to lock the inner tub at a fixed position and then controls the driving member to operate, and the driving member drives the inner tub sealing mechanism to open the water outlet through the transmission assembly to perform the drainage process.

Further, the washing machine includes a water collecting device, the water collecting device has a water collecting chamber for collecting washing water discharged from the drain port of the inner tub, and a first water level for detecting the water level in the water collecting chamber is set in the water collecting device a detection device and a second water level detection device;

During the draining process of the washing machine, when the second water level detection device detects that the water level in the water collecting device is less than or equal to the lower limit water level, the driving part is controlled to operate, and the inner tub sealing mechanism is driven by the transmission component to increase the opening of the drain;

When the first water level detection device and the second water level detection device detect that the water level in the water collecting device is greater than the lower limit water level and less than the upper limit water level, the driving part is controlled to operate, and the inner barrel sealing mechanism is driven by the transmission assembly to reduce the opening of the drain;

When the first water level detection device detects that the water level in the water collecting device is greater than or equal to the upper limit water level, the driving element is controlled to operate, and the inner barrel sealing mechanism is driven by the transmission assembly to close the water outlet.

The inner tub of the washing machine of the present invention is sealed by the inner tub sealing mechanism. When the water is drained, the driving element drives the transmission assembly, and the transmission assembly converts the power output of the driving element into reciprocating motion along the central axis of the inner tub to drive the inner tub sealing mechanism to open/close. drain. The sealing driving mechanism of the invention has stable transmission, can drive the inner barrel sealing mechanism to open/close the water outlet, and the driving process of the sealing driving mechanism can be adjusted, so that the opening of the inner barrel sealing mechanism can be controlled according to the water displacement, and the drainage process can be controlled. , improve drainage efficiency and avoid overflow.

Description of drawings

1 is a schematic structural diagram of a washing machine according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a sealing drive mechanism according to an embodiment of the present invention.

Description of the symbols in the drawings: 1. inner barrel; 2. water collecting device; 3. barrel bottom body; 4. barrel bottom flange; 5. positioning device; 6. reducer; 7. water outlet; 8. valve plug; 9. Compression spring; 10. Valve plug seat; 11. Support; 12. Bracket; 13. Drive rod; 14. Second water level detection device; 15. First water level detection device; 16. Sealing drive mechanism; 17. Drive 18. Rotating output shaft; 19. Transmission gear; 20. Transmission rack; 21. Housing; 22. Pull rod; 23. Installation port;

Detailed ways

Below in conjunction with accompanying drawing, a kind of washing machine of the present invention and its control method are described in detail:

As shown in FIG. 1 and FIG. 2 , this embodiment provides a washing machine, including:

In the inner barrel 1, the bottom of the inner barrel 1 is provided with a drainage port 7;

The inner barrel sealing mechanism is installed on the drain port 7 to keep it in a normally closed state, so that the inner barrel 1 can independently hold washing water;

and a sealing driving mechanism 16, including a driving member 17 and a transmission assembly, the transmission assembly converts the power output of the driving member 17 into a reciprocating motion along the central axis of the inner tub 1 to drive the inner tub sealing mechanism to open/close the drain port 7 .

The inner tub 1 of the washing machine in this embodiment holds the washing water independently during washing. Compared with the traditional automatic washing machine, the washing water does not exist between the inner tub and the outer tub, which not only prevents the washing water from affecting the outer wall of the inner tub and the outer tub. The accumulation of dirt caused by the inner wall affects the washing effect, and can save washing water, energy saving and emission reduction. In order to realize that the inner tub 1 can independently hold washing water, the inner tub of this embodiment is a "non-porous inner tub", and the part of the inner tub 1 below the highest water level is closed. In this way, the inner tub 1 is in the washing process. It can be used to hold water; a dehydration hole is provided on the wall of the inner barrel 1 above the highest water level. During the dehydration process of the inner barrel 1, due to the centrifugal effect, the water that is dehydrated can be discharged from the dehydration hole.

In order to drain the water in the inner tub 1 completely, the washing machine of this embodiment is provided with a drain port 7 at the bottom of the inner tub 1. At the same time, in order to keep the interior of the inner tub 1 closed, the washing machine also includes an inner tub seal that can open and close the drain port 7. mechanism.

The inner tub seal of the washing machine in this embodiment is sealed by the inner tub sealing mechanism. When the water is drained, the driving member 17 drives the transmission assembly. The transmission assembly converts the power output of the driving member 17 into reciprocating motion along the central axis of the inner tub 1 to drive the inner tub seal. Mechanism opens/closes drain 7. The sealing drive mechanism 16 in this embodiment has stable transmission, can drive the inner barrel sealing mechanism to open/close the water outlet 7, and the driving process of the sealing driving mechanism 16 is adjustable, so that the opening degree of the inner barrel sealing mechanism can be controlled according to the water displacement, and the Control the drainage process to improve drainage efficiency and avoid overflow.

As an implementation of this embodiment, the washing machine of this embodiment further includes a water collecting device 2, and the water collecting device 2 includes a water collecting bottom wall located below the bottom of the inner tub 1 and a water collecting peripheral wall surrounding the water collecting bottom wall, The water collecting bottom wall and the water collecting peripheral wall together form a water collecting chamber for collecting the washing water discharged from the drain port of the inner tub; the driving member 17 is installed on the water collecting peripheral wall.

In this embodiment, the inner tub 1 of the washing machine is used as a water tub, and a water collecting device 2 is arranged outside the inner tub 1. The water collecting device 2 can be the outer tub of a traditional automatic washing machine, or no outer tub is provided. The water collecting device 2 has a water collecting cavity In order to realize the function of temporarily storing water, the height of the water collecting device 2 is less than the height of the inner tub 1, the water collecting device 2 is located below the inner tub 1 and is arranged coaxially with the inner tub 1, and the upper opening of the water collecting device 2 is lower than the inner tub 1. The dewatering hole is provided on the inner barrel 1, and a drainage channel extending from top to bottom in the water collecting tank of the water collecting device 2 is arranged on the cylinder wall of the inner barrel 1, and the drainage channel is communicated with the dewatering hole on the inner barrel 1.

Preferably, the driving member 17 in this embodiment can be selected from a stepping motor.

In order to control the opening/closing of the water outlet 7 by the inner tub sealing mechanism, the driving member 17 in this embodiment has a rotary output shaft 18 , and the transmission assembly includes a transmission gear 19 mounted on the rotary output shaft 18 , and a transmission gear 19 . The transmission rack 20 for meshing transmission and the pull rod 22 fixed with the transmission rack 20; the rotation output of the rotary output shaft 18 is converted into the reciprocation of the pull rod 22 along the central axis direction of the inner barrel 1 through the transmission gear 19 and the transmission rack 20. Movement to drive the inner barrel sealing mechanism to open/close the drain port 7 . The transmission assembly of this embodiment converts the rotational output of the driving member 17 into linear reciprocating motion along the central axis direction of the inner tub 1 by means of the transmission gear 19 meshing with the transmission rack 20, thereby opening/closing the water outlet 7, and the gear The transmission mode of the rack is not only simple in structure and stable in transmission process, but also by controlling the rotation angle of the driving element, the pull rod 22 is controlled to drive the inner barrel sealing mechanism to open the opening of the water outlet 7 .

As an implementation of this embodiment, the inner barrel sealing mechanism includes a sealing assembly and an elastic assembly for keeping the sealing assembly to block the drain 7, and the pull rod 22 acts on the sealing assembly to drive it to overcome the elastic force of the elastic assembly Open the drain.

Further, the sealing assembly includes a valve plug 8 , a valve plug seat 10 and a drive rod 13 , the valve plug 8 is installed on the valve plug seat 10 , and the elastic assembly acts on the valve plug seat 10 to keep the valve plug 8 blocked Drain port 7, the bottom of the inner tub 1 is provided with a bracket 12, the middle of the driving rod 13 is rotatably mounted on the bracket 12, one end of the driving rod 13 is connected to the valve plug seat 10, and the other end is used to connect with the pull rod 22 match. The driving rod 13 of this embodiment is rotatably mounted on the bracket 12 to form a lever mechanism.

Specifically, the pull rod 22 in this embodiment includes a first pull rod arm 24 extending along the direction of the central axis of the inner tub 1 and a second pull rod arm 25 having one end connected to the first pull rod arm 24 and the other end extending toward the drive rod 13 , The second pull rod arm 25 is located below the drive rod 13. When the pull rod 22 moves upward along the central axis of the inner tub, the second pull rod arm 25 acts on the drive rod 13 to drive the valve plug 8 to overcome the downward movement of the elastic component to open the valve. Describe the drain port 7.

The elastic assembly described in this embodiment includes a support 11 and a compression spring 9 , the support 11 is fixedly arranged outside the bottom of the inner tub 1 , one end of the compression spring 9 abuts on the support 11 , and the other end against the seal assembly.

Preferably, the barrel bottom of the inner barrel 1 includes a barrel bottom body 3 and a barrel bottom flange 4 installed at the lower part of the barrel bottom body, the water outlet 7 is opened on the barrel bottom body 3, and the barrel bottom flange A mounting port 23 for the sealing assembly is provided at a position corresponding to the drain port 7 on 4 , and the support 11 is mounted on the mounting port 23 .

Installation of the inner barrel sealing mechanism in this embodiment: the valve plug 8 is installed in the groove of the valve plug seat 10, and the fixing hole in the middle of the driving rod 13 is connected with the bracket 12 protruding from the barrel bottom flange 4 through a pin, which acts as a lever The function of the fulcrum, the bottom of the valve plug seat 10 is supported upward by the compression spring 9, the compression spring 9 is installed in the support 11 (the support is hollow type), the support 11 is fixed on the bottom flange 4 of the barrel by screws, and the compression spring The elastic force of 9 pushes the valve plug 8 against the drain port 7 of the inner barrel to play a sealing role.

As an implementation of this embodiment, the water collection device 2 is provided with a first water level detection device 15 and a second water level detection device 14 for detecting the water level in the water collection chamber. The first water level detection device 15 detects the upper limit water level in the water collection device, and the second water level detection device 14 detects the lower limit water level in the water collection device.

In the washing machine of this embodiment, the inner tub is sealed with a normally closed valve plug, and the valve plug is installed on the valve plug seat. When the water is drained, the driving member rotates to drive the pull rod to rise, and the pull rod passes through the hole at the power arm end of the drive rod to pull the drive rod upward , the resistance arm end of the drive rod connected to the valve seat will drive the seal to descend, thereby opening the drain port of the inner barrel. In the washing machine of this embodiment, there is no phenomenon of the top rod topping off or the bottom of the inner tub being stuck, and there is no such alarm phenomenon during the washing process, which improves the user's sense of experience when washing.

This embodiment also provides a method for controlling a washing machine. The washing machine controls the operation of a driving member, and the transmission assembly converts the power output of the driving member into a reciprocating motion along the central axis of the inner tub to drive the inner tub sealing mechanism to open/close the drainage. mouth.

Preferably, the washing machine further includes a positioning device 5. The washing machine controls the positioning device 5 to lock the inner tub at a fixed position and then controls the driving member to operate.

The drainage process of the washing machine in this embodiment:

When the washing machine needs to drain water after washing, first drive the motor to drive the reducer 6 to drive the inner tub 1 to rotate. During the slow rotation of the inner tub 1, the positioning lock rod of the positioning device 5 is raised until the positioning lock rod penetrates into the bottom flange of the tub 4, the inner barrel 1 stops rotating (the inner barrel brake hole and the drain hole 7 are located on both sides of the reducer 6).

When the inner tub 1 stops rotating, it means that the position is fixed. At this time, the driving member 17 receives the command and rotates according to the programmed angle to drive the pulling rod 22 to move upward. The hook of the pulling rod 22 passes through the hole on the driving rod 13 to connect The power arm end of the driving rod 13 is pulled up. When the pulling force is greater than the elastic force of the compression spring 9, the valve plug seat 10 moves downward, and the valve plug 8 leaves the inner tub drain port 7, thereby opening the inner tub bottom drain port 7 for drainage.

When the water in the inner tub 1 is quickly discharged to the outside, the water level in the water collecting device 2 will rise. If the water level reaches the set position, the first water level detection device 15 will detect it and send a feedback signal to the computer board. Send an instruction to the drive member 17, the drive member 17 works to drive the pull rod 22 to move downward, the power arm end of the drive rod 13 also moves downward, the compression spring 9 pushes up the valve plug seat 10, and the valve plug 8 and the inner barrel drain port 7 are connected. When the gap becomes smaller, the discharged water becomes less. When the water level of the water collecting device 2 drops to the second water level detection device 14, the driving member 17 works to drive the pull rod 22 to move upward, and the gap between the valve plug 8 and the inner barrel drain port 7 becomes larger until the water is drained. Finish.

The control method of the washing machine of this embodiment automatically controls the drainage process during the drainage process, detects the water level discharged into the water collecting device in real time, and adjusts the drainage speed according to the water level to prevent overflow caused by excessive drainage.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Within the scope of the technical solution of the present invention, personnel can make some changes or modifications to equivalent examples of equivalent changes by using the above-mentioned technical content, but any content that does not depart from the technical solution of the present invention is based on the technical solution of the present invention. Substantially any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the solutions of the present invention.

Claims

A washing machine, characterized in that, comprising:

The inner barrel, the bottom of the inner barrel is provided with a drainage outlet;

The inner barrel sealing mechanism is installed on the drain port to keep it in a normally closed state, so that the inner barrel can independently hold washing water;

and a sealing driving mechanism, including a driving member and a transmission assembly, the transmission assembly converts the power output of the driving member into reciprocating motion along the central axis of the inner tub to drive the inner tub sealing mechanism to open/close the water outlet.
The washing machine of claim 1, further comprising a water collecting device comprising a water collecting bottom wall located below the bottom of the inner tub and a water collecting peripheral wall surrounding the water collecting bottom wall, the water collecting bottom The wall and the water collecting peripheral wall together form a water collecting chamber for collecting the washing water from the drain outlet of the inner tub;

The driving member is installed on the water collecting peripheral wall.
The washing machine according to claim 1 or 2, wherein the driving member has a rotary output shaft, and the transmission assembly comprises a transmission gear mounted on the rotary output shaft, and a transmission rack meshed with the transmission gear. And the tie rod fixed with the drive rack;

The rotary output of the rotary output shaft is converted into the reciprocating motion of the pull rod along the central axis direction of the inner tub through the transmission gear and the transmission rack to drive the inner tub sealing mechanism to open/close the water outlet.
The washing machine according to claim 3, wherein the inner tub sealing mechanism comprises a sealing assembly and an elastic assembly for keeping the sealing assembly to block the drain, and the pull rod acts on the sealing assembly to drive it to overcome the elasticity of the elastic assembly Force open the drain.
The washing machine according to claim 4, wherein the sealing component comprises a valve plug, a valve plug seat and a driving rod, the valve plug is installed on the valve plug seat, and the elastic component acts on the valve plug seat to keep the valve The plug seals the drain, the bottom of the inner barrel is provided with a bracket, the middle part of the driving rod is rotatably mounted on the bracket, one end of the driving rod is connected to the valve plug seat, and the other end is used for matching with the pull rod.
The washing machine according to claim 5, wherein the pull rod comprises a first pull rod arm extending along the direction of the central axis of the inner tub and a second pull rod arm with one end connected to the first pull rod arm and the other end extending toward the drive rod The second pull rod arm is located below the drive rod. When the pull rod moves upwards along the central axis of the inner tub, the second pull rod arm acts on the drive rod to drive the valve plug to overcome the downward movement of the elastic component to open the water outlet.
The washing machine according to claim 4, wherein the elastic component comprises a support and a compression spring, the support is fixedly arranged outside the bottom of the inner tub, and one end of the compression spring stops against the support , and the other end stops on the sealing assembly;

Preferably, the barrel bottom of the inner barrel includes a barrel bottom body and a barrel bottom flange installed at the lower part of the barrel bottom body, the drain port is opened on the barrel bottom body, and the barrel bottom flange corresponds to the drain port. An installation opening for the sealing assembly is provided at the position, and the support is installed on the installation opening.
The washing machine according to claim 2, wherein a first water level detection device and a second water level detection device for detecting the water level in the water collection chamber are arranged in the water collection device, and the first water level detection device The upper limit water level in the water collection device is detected, and the second water level detection device detects the lower limit water level in the water collection device.
A method for controlling a washing machine according to any one of claims 1 to 9, wherein the washing machine controls the operation of a driving member, and the transmission assembly converts the power output of the driving member into a reciprocating motion along the central axis of the inner tub Movement to drive the inner barrel sealing mechanism to open/close the drain;

Preferably, the washing machine further includes a positioning device, the washing machine controls the positioning device to lock the inner tub at a fixed position and then controls the driving member to operate, and the driving member drives the inner tub sealing mechanism to open the water outlet through the transmission assembly to perform the drainage process.
The control method according to claim 9, wherein the washing machine includes a water collecting device, the water collecting device has a water collecting chamber for collecting the washing water discharged from the drain port of the inner tub, and the water collecting device is provided with a water collecting chamber for discharging the washing water. a first water level detection device and a second water level detection device for detecting the water level in the water collection chamber;

During the draining process of the washing machine, when the second water level detection device detects that the water level in the water collecting device is less than or equal to the lower limit water level, the driving part is controlled to operate, and the inner tub sealing mechanism is driven by the transmission component to increase the opening of the drain;

When the first water level detection device and the second water level detection device detect that the water level in the water collecting device is greater than the lower limit water level and less than the upper limit water level, the driving part is controlled to operate, and the inner barrel sealing mechanism is driven by the transmission assembly to reduce the opening of the drain;

When the first water level detection device detects that the water level in the water collecting device is greater than or equal to the upper limit water level, the driving element is controlled to operate, and the inner barrel sealing mechanism is driven by the transmission assembly to close the water outlet.