CN111850925B - Drum washing machine - Google Patents

Abstract

The invention provides a drum washing machine, comprising an inner drum; an inner cylinder door which can be opened/closed and is arranged on a cylinder opening of the inner cylinder; a sealing device is arranged between the opening of the inner cylinder and the inner cylinder door, the opening of the inner cylinder is kept to be sealed and closed through the sealing device when the inner cylinder door is closed, the inner cylinder and the inner cylinder door jointly form an independent washing chamber, and washing water is independently contained when clothes are washed. The drum washing machine disclosed by the invention has the advantages that the sealing device is used for keeping the opening of the inner drum closed when the door of the inner drum is closed, so that washing water is only in the inner drum during washing or rinsing, the influence of water leakage of the inner drum on the washing effect is avoided, and even the washing machine cannot work normally.

Description

A drum washing machine

technical field

The invention relates to the technical field of laundry equipment, in particular to a drum washing machine.

Background technique

As the most widely used household appliance in people's daily life, washing machine helps people to get rid of the troubles of laundry and brings great convenience to people. However, with the improvement of people's living standards, there are more and more washing requirements for washing machines. Specifically, because different types of clothes cannot be mixed in the same washing tub, or the clothes of various family members cannot be mixed in the same washing tub Internal washing has led to a need for separate washing in partitions.

In order to solve the purpose of independent washing in partitions, the existing application number is 201410806293.2, and the name is: a Chinese invention patent for a double-drum drum washing machine. This invention provides a double-drum drum washing machine, including a casing, a control panel, and a first container cavity, the second cavity, the first cavity and the second cavity are concentric and the radius of the second cavity is smaller than the radius of the first cavity, the control panel can control the first cavity and the second cavity to work simultaneously, It is also possible to control the first chamber and the second chamber to work independently. The beneficial effect of the invention is that the ingenious design of the structure not only simplifies the space occupied by the washing machine, but also realizes that underwear and outerwear, light-colored clothes and dark-colored clothes can be washed in one washing process, which saves energy consumption and satisfies different needs. Clothes washing requirements, to achieve a good washing effect.

Although the drum washing machine of the above-mentioned invention patent has a first chamber and a second chamber to meet the washing requirements of different clothes, in essence, when the first chamber and the second chamber work at the same time, the inner cylinder has a dehydration hole, resulting in The two cavities are connected, and the independent partition washing of the two cavities cannot be realized.

In addition, people have higher and higher requirements for the water-saving performance and self-cleaning performance of the washing machine.

In view of this, the present invention is proposed.

Contents of the invention

In order to solve the above problems, the object of the invention of the present invention is to provide a drum washing machine, specifically, the following technical solutions are adopted:

A drum washing machine, comprising:

Inner cylinder;

The inner cylinder door, which can be opened/closed is installed on the mouth of the inner cylinder;

A sealing device is provided between the mouth of the inner cylinder and the door of the inner cylinder. When the door of the inner cylinder is closed, the mouth of the inner cylinder is kept sealed by the sealing device. The inner cylinder and the door of the inner cylinder together form an independent washing chamber, which can be independently stored when washing clothes. Put the washing water.

Further, the sealing device includes an axial sealing device for sealing along the direction of the central axis of the inner cylinder, the axial sealing device includes an axial seal arranged on the door of the inner cylinder/on the edge of the mouth of the inner cylinder, and a corresponding The axial sealing fitting part is arranged on the edge of the barrel mouth of the inner barrel/on the inner barrel door, and the axial sealing member is in sealing contact with the axial sealing fitting part in the direction along the central axis of the inner barrel.

Further, the axial seal is installed on the inner cylinder door, including a curved part and a sealing part; the axial seal matching part is an annular sinker arranged on the edge of the inner cylinder mouth; the curved When the inner cylinder door is closed, the bending deformation exerts force on the sealing part, and the sealing part maintains sealing contact with the annular sinker for axial sealing.

Further, the axial seal also includes a base, one end of the curved part is connected to the base, and the other end is connected to the sealing part; an annular installation groove is provided on the inner cylinder door, and the base is installed in the ring mounting groove;

Preferably, the base portion, the bending portion and the sealing portion are integrally formed.

Further, the base part is an annular base block, the curved part has at least one bent arm along the central axis of the inner cylinder, and the sealing part includes a sealing part arranged parallel to the bottom wall of the annular sinker. Contact surfaces.

Further, the sealing device includes a radial sealing device that seals in the radial direction of the inner cylinder, and the radial sealing device includes a radial seal arranged on the inner cylinder door/on the edge of the inner cylinder mouth, and a corresponding setting The radial sealing fitting part on the edge of the barrel mouth of the inner cylinder/on the inner barrel door, the radial sealing member is in sealing contact with the radial sealing fitting part along the radial direction of the inner barrel.

Further, the radial seal is installed on the outer peripheral wall of the inner cylinder door, including a deformation part; the radial seal matching part is an annular groove provided on the inner wall of the inner cylinder mouth edge; the deformation When the inner cylinder door is closed, the deformation part bends into the annular groove, and the deformation part keeps sealing contact with the annular groove for radial sealing.

Further, the deformation part is a deformation fin made of elastic material, and the deformation fin is installed on the outer peripheral wall of the inner cylinder door, and the radial height of the annular fin is greater than that between the outer circumference of the inner cylinder door and the inner cylinder. The distance between the inner walls of the barrel mouth; the axial thickness of the deformed fins is smaller than the notch width of the annular groove.

Further, the axial seal and the radial seal are both ring structures, and the axial seal fitting part and the radial seal fitting part are arranged on the entire circumference of the inner cylinder door/the mouth edge of the inner cylinder, and the axial seal The sealing part keeps sealing contact with the axial sealing matching part to realize the axial sealing on the whole circumference, and the radial sealing part keeps sealing contact with the radial sealing matching part to realize the radial sealing on the whole circumference.

Further, the inner cylinder door includes an outer door cover that covers the mouth of the inner cylinder, and an inner door cover that extends inwardly of the inner cylinder along the axial direction of the inner cylinder;

The axial seal is arranged on the inner wall surface of the outer door cover near the mouth of the inner cylinder, and the annular sinking groove is formed by the outer wall of the edge of the mouth of the inner cylinder being recessed toward the inside of the inner cylinder;

The radial seal is arranged on the outer peripheral wall of the door inner cover, and the annular groove is arranged on the inner peripheral wall of the mouth edge of the inner cylinder.

The drum washing machine of the present invention installs the inner drum door on the drum opening of the inner drum, and adopts a non-porous drum design inside, and the two together form an independent washing chamber. Filling the washing/rinsing water between them greatly reduces the washing water consumption of the washing machine; avoids the possibility of dirt adhesion between the inner cylinder and the outer cylinder; greatly improves the user's health and user experience, and greatly saves water resource.

In the drum washing machine of the present invention, the sealing device realizes that when the inner cylinder door is closed, the opening of the inner cylinder is kept sealed and closed, so that the washing water is only in the inner cylinder during washing or rinsing, so as to avoid water leakage from the inner cylinder affecting the washing effect, and even causing the washing machine to fail to work normally .

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram (closed state of machine door) of the drum washing machine of embodiment one, two, three of the present invention;

Fig. 2 is a three-dimensional schematic diagram of the drum washing machine of Embodiments 1, 2, and 3 of the present invention (the machine door is opened);

Fig. 3 is the front view of the front-loading washing machine of Embodiments 1, 2 and 3 of the present invention (closed state of the machine door);

Fig. 4 is the front view of the front-loading washing machine of Embodiments 1, 2 and 3 of the present invention (the machine door is opened);

Fig. 5 is a cross-sectional view of the front-loading washing machine of Embodiments 1, 2 and 3 of the present invention along the plane A-A in Fig. 3;

Fig. 6 is a partially enlarged view of Fig. 5 of the drum washing machine according to Embodiment 2 of the present invention;

FIG. 7 is a partial enlarged view of FIG. 6 of the drum washing machine according to Embodiment 2 of the present invention;

Fig. 8 is a partially enlarged view 1 of Fig. 7 of the drum washing machine according to the second embodiment of the present invention;

Fig. 9 is a partial enlarged view 2 of Fig. 7 of the drum washing machine according to the second embodiment of the present invention;

Fig. 10 is a partially enlarged view of Fig. 5 of the drum washing machine according to Embodiment 3 of the present invention;

Fig. 11 is a partially enlarged view 1 of Fig. 10 of the drum washing machine according to Embodiment 3 of the present invention;

Fig. 12 is the partial enlarged view 2 of Fig. 10 of the drum washing machine according to the third embodiment of the present invention;

Fig. 13 is a schematic structural view of the inner drum door of the drum washing machine according to Embodiment 3 of the present invention;

Fig. 14 is a structural schematic diagram of the inner drum door rotating shaft of the drum washing machine according to Embodiment 3 of the present invention;

Fig. 15 is a partially enlarged view of the inner drum door of the drum washing machine according to Embodiment 3 of the present invention;

Fig. 16 is a schematic diagram of the principles of the fourth drum washing machine of Embodiment 4 of the present invention;

Fig. 17 is a schematic diagram of the principle of the drum washing machine according to Embodiment 5 of the present invention (implementation mode 1);

Fig. 18 is a schematic diagram of the principles of the drum washing machine in Example 5 of the present invention (implementation mode 2);

Fig. 19 is a schematic diagram of the principles of the drum washing machine in Example 5 of the present invention (implementation mode 3);

Fig. 20 is a schematic diagram of the principles of the six-drum washing machine of Embodiment 6 of the present invention;

Fig. 21 is a partially enlarged view in Fig. 5 of the six-drum washing machine of Embodiment 6 of the present invention (pressure relief state);

Fig. 22 is a partially enlarged view (pressurized state) of Fig. 5 of the six-drum washing machine according to the embodiment of the present invention;

Fig. 23 is a schematic diagram of the principle of the seven-drum washing machine of Embodiment 7 of the present invention;

Fig. 24 is a partially enlarged view in Fig. 23 of the drum washing machine of Embodiment 7 of the present invention (pressure relief state of Embodiment 1);

Fig. 25 is a partially enlarged view in Fig. 23 of the drum washing machine of Embodiment 7 of the present invention (pressurized state of Embodiment 1);

Fig. 26 is a partially enlarged view in Fig. 23 of the drum washing machine of Embodiment 7 of the present invention (the pressure relief state of Embodiment 2);

Fig. 27 is a partially enlarged view in Fig. 23 of the drum washing machine of Embodiment 7 of the present invention (pressurized state of Embodiment 2).

Detailed ways

A kind of drum washing machine of the present invention is described in detail below in conjunction with accompanying drawing:

As shown in Figures 1-27, this embodiment provides a front-loading drum washing machine with a non-porous inner cylinder, which has a simple structure and can greatly reduce the need for filling washing/rinsing water between the inner cylinder and the outer cylinder. The washing water consumption of the washing machine. The possibility of dirt adhesion between the inner cylinder and the outer cylinder is avoided. It greatly improves user health and user experience, and greatly saves water resources.

The drum washing machine of this embodiment has a casing 19, and the casing 19 includes: a top panel 2, a front panel, a back panel and a bottom panel. Footings 9 are installed and fixed on the bottom plate for supporting the whole washing machine. The casing 19 has an outer cylinder 18 inside, and an inner cylinder 17 is coaxially arranged inside the outer cylinder 18 . The main purpose of the outer cylinder 18 is to collect the drainage of the inner cylinder 17 and the drainage of the inner cylinder 17 for high-speed centrifugal dehydration. The inner tube 17 rotates, preferably a lifting rib 43 is provided to continuously lift, drop and beat the clothes, so that the clothes can be cleaned. The inner cylinder 17 is non-porous. The outer cylinder 18 has a center mounting hole, and the bearing 12 is installed and fixed. The inner cylinder shaft 13 fastened to the inner cylinder 17 passes through the shown bearing 12 and connects to the drive motor 16 . An openable/closable inner cylinder door 6 is installed on the mouth of the front part of the inner cylinder 17, so that the inner cylinder 17 is a sealed cabin structure.

The machine door 5 that can be opened/closed is installed on the casing 19 of the present embodiment.

Embodiment one

As shown in Figures 1-5, a drum washing machine in this embodiment includes:

Inner cylinder 17;

The inner cylinder door 6 is installed on the mouth of the inner cylinder 17 which can be opened/closed;

The inner cylinder 17 and the inner cylinder door 6 jointly form an independent washing chamber, which holds washing water independently when washing clothes.

The drum washing machine of this embodiment installs the inner cylinder door 6 on the mouth of the inner cylinder 17, and the inner cylinder 17 adopts a non-porous cylinder design, and the two together form an independent washing chamber. Filling the washing/rinsing water between the inner cylinder and the outer cylinder greatly reduces the washing water consumption of the washing machine; avoids the possibility of dirt adhesion between the inner cylinder and the outer cylinder; greatly improves user health and user experience, and greatly Greatly saves water resources.

The inner cylinder 17 described in this embodiment is a non-porous cylinder, and one side edge of the inner cylinder door 6 is rotatably installed on the mouth of the inner cylinder 17 through the inner cylinder door hinge, and the inner cylinder door 6 rotates to close the inner cylinder. The barrel mouth and the inner barrel jointly form an independent washing chamber.

Further, an inner cylinder door lock hole is provided on the side edge of the inner cylinder door 6/inner cylinder 17 opposite to the hinge, and an inner cylinder door lock tongue is correspondingly provided on the cylinder mouth/inner cylinder door of the inner cylinder 17 601, the inner cylinder door lock tongue 601 is locked and matched with the inner cylinder door lock hole.

Further, the drum washing machine also includes an inner drum door frame, which is installed on the mouth of the inner drum 17, and the inner drum door 6 is mounted on the inner drum door frame so that it can be opened/closed. In this way, the cylinder structure of the inner cylinder 17 can be simplified, and the installation of the inner cylinder door 6 can be realized, which is convenient for sealing assembly.

In order to form a closed washing chamber, the inner cylinder door 6 is provided with a sealing device for sealing the mouth of the inner cylinder 17 when the inner cylinder door 6 is closed.

Preferably, the sealing device includes a sealing ring matching the shape of the mouth of the inner cylinder 17 .

Further, the drum washing machine also includes a casing 19 and an outer cylinder 18 arranged coaxially with the inner cylinder 17 inside the casing 19, and an opening is provided on the casing 19 corresponding to the mouth of the outer cylinder, and the casing 19 Openable/closable machine door 5 is installed on the opening.

Specifically, one side edge of the door 5 is rotatably mounted on the opening of the casing 19 through the door hinge 33; A lock hole, the door 19 is provided with a door lock tongue 503 matching the door lock hole.

Further, the mouth of the outer cylinder 18 is provided with a sealing gasket 35 which is in sealing contact with the inner wall of the housing 19 to prevent water droplets from getting wet clothes or tiny water mist splashed by centrifugal drainage from entering the housing 19 .

In order to realize the drainage of the non-porous inner cylinder, a drain port is provided on the side wall of the inner cylinder 17, and a centrifugal valve for keeping the drain port normally closed is arranged on the described drain port. When the set value is exceeded, the drain port is opened for drainage.

Embodiment two

As shown in Figures 1-9, a drum washing machine in this embodiment includes:

Inner cylinder 17;

The inner cylinder door 6 is installed on the mouth of the inner cylinder 17 which can be opened/closed;

A sealing device is arranged between the cylinder mouth of the inner cylinder 17 and the inner cylinder door 6, and the cylinder mouth of the inner cylinder 17 is kept sealed and closed by the sealing device when the inner cylinder door 6 is closed, and the inner cylinder 17 and the inner cylinder door 6 jointly form an independent washing chamber , Independently hold the washing water when washing clothes.

The drum washing machine of this embodiment realizes that when the inner cylinder door 6 is closed, the cylinder mouth of the inner cylinder 17 is sealed and closed through the sealing device, so that the washing water is only in the inner cylinder during washing or rinsing, so as to avoid the water leakage of the inner cylinder from affecting the washing effect, and even causing the washing machine to be damaged. can not work normally.

In order to prevent water leakage between the mouth of the inner cylinder 17 and the inner cylinder door 6, the sealing device described in this embodiment includes an axial sealing device 37 that seals along the direction of the central axis of the inner cylinder. The axial sealing device 37 includes a set The axial seal on the inner cylinder door 6/on the edge of the inner cylinder 17, and the corresponding axial seal matching part arranged on the inner cylinder mouth edge/on the inner cylinder door, the axial seal is on In the direction of the central axis of the inner cylinder, it is in sealing contact with the axial sealing matching portion. In this embodiment, the axial sealing between the inner cylinder door 6 and the cylinder mouth of the inner cylinder 17 is realized by setting an axial sealing device 37 between the inner cylinder door and the cylinder mouth of the inner cylinder.

Specifically, the axial seal is installed on the inner cylinder door 6, including a bent portion 3702 and a sealing portion 3703; the axial seal matching portion is an annular sink groove 36 provided on the edge of the inner cylinder 17 The bending deformation of the bending part 3702 exerts force on the sealing part 3703 when the inner cylinder door 6 is closed, and the sealing part 3703 is kept in sealing contact with the annular sinker 36 for axial sealing.

Further, the axial seal 37 also includes a base portion 3701, one end of the curved portion 3702 is connected to the base portion 3701, and the other end is connected to the sealing portion 3703; the inner cylinder door 6 is provided with an annular installation groove , the base 3701 is installed in the annular installation groove.

Preferably, the base part 3707, the bent part 3702 and the sealing part 3703 are integrally formed.

The base part 3701 in this embodiment is an annular base block, the bent part 3702 has at least one bent arm along the central axis of the inner cylinder 17, and the sealing part 3703 includes the bottom of the annular sinker 36 Wall-parallel arrangement of the sealing contact surfaces.

At the same time, the sealing device described in this embodiment includes a radial sealing device 38 that seals along the radial direction of the inner cylinder 17, and the radial sealing device includes a radial seal arranged on the inner cylinder door/on the edge of the inner cylinder mouth , and correspondingly arranged on the edge of the mouth of the inner cylinder/on the inner cylinder door, the radial seal is in sealing contact with the radial seal along the radial direction of the inner cylinder.

Further, the radial seal is installed on the outer peripheral wall of the inner cylinder door, including a deformation part 38; the radial seal matching part is an annular groove 39 provided on the inner wall of the inner cylinder mouth edge; the The deformation part 38 of the inner cylinder door is bent into the annular groove 39 when the inner cylinder door is closed, and the deformation part 38 and the annular groove 39 are kept in sealing contact for radial sealing.

Specifically, the deformation part is a deformation fin made of elastic material, and the deformation fin is installed on the outer peripheral wall of the inner cylinder door, and the radial height of the annular fin is greater than that between the outer circumference of the inner cylinder door and the inner cylinder. The distance between the inner walls of the barrel mouth; the axial thickness of the deformed fins is smaller than the notch width of the annular groove. This ensures that the annular fins are in sealing contact with the bottom wall of the annular groove to achieve radial sealing.

In order to realize the sealing of the inner cylinder door 6 and the cylinder opening of the inner cylinder 17 on the entire circumference, the axial seal 37 and the radial seal are both ring structures, and the axial seal matching part and the radial seal matching part are arranged on On the entire circumference of the inner cylinder door/inner cylinder mouth edge, the axial seal is in sealing contact with the axial seal matching part to achieve axial sealing on the entire circumference, and the radial seal is in sealing contact with the radial seal matching part to achieve Radial sealing over the entire circumference.

Further, the inner cylinder door includes an outer door cover that covers the mouth of the inner cylinder, and an inner door cover that extends inwardly of the inner cylinder along the axial direction of the inner cylinder;

The axial seal is arranged on the inner wall surface of the outer door cover near the mouth of the inner cylinder, and the annular sinking groove is formed by the outer wall of the edge of the mouth of the inner cylinder being recessed toward the inside of the inner cylinder;

The radial seal is arranged on the outer peripheral wall of the door inner cover, and the annular groove is arranged on the inner peripheral wall of the mouth edge of the inner cylinder.

Embodiment three

As shown in Figures 1-5 and 10-15, a drum washing machine in this embodiment includes:

Inner cylinder 17;

The inner cylinder door 6 includes a fixedly connected door outer cover and a door inner cover 602;

The inner cylinder door 6 can be opened/closed and installed on the mouth of the inner cylinder 17. When closed, the inner cylinder 17 and the inner cylinder door 6 together form an independent washing chamber, and the washing water is independently held when washing clothes .

As shown in Figures 10 and 11, specifically, the door outer cover includes a base cover 603 and a decorative cover 604, the door inner cover 602 is installed on one side of the base cover 603, and the decorative cover 604 is installed on The other side of the base cover 603.

Preferably, the door inner cover 602 is fixedly connected to the base cover 603 through screws 42 .

The decorative cover 604 is clamped on the base cover 603. Specifically, as shown in FIG. Cooperate with the card slot 50 to realize card connection.

The drum washing machine in this embodiment also includes an inner drum door shaft 40, and the inner drum door 6 has a shaft groove 41 for installing the inner drum door shaft.

Preferably, the base cover is provided with a base cover groove, the door inner cover is provided with a door inner cover groove, and the opening of the base cover groove is arranged opposite to the opening of the door inner cover groove to form a shaft groove.

As shown in Figures 13 and 14, specifically, the inner cylinder door shaft 40 includes a first rotating shaft and a second rotating shaft, an elastic element 49 is arranged between the first rotating shaft and the second rotating shaft, and the two ends of the elastic element 49 Respectively stop against the first rotating shaft and the second rotating shaft, one end of the first rotating shaft and one end of the second rotating shaft protrude out of the shaft groove under the action of the elastic force of the elastic element for assembling with the rotating shaft hole.

The door inner cover 602 and/or the base cover 603 is provided with a chute 46 communicating with the shaft groove, the first rotating shaft and/or the second rotating shaft has a pusher 47, and the pusher 47 is arranged on the chute 46 Inside.

In this way, by pushing the pushing part 47 to slide along the chute 46, the protruding end of the inner cylinder door shaft 40 retracts into the shaft hole 48, so that the quick installation and quick disassembly of the inner cylinder door can be realized.

Further, a first chute and a second chute are provided on the outer cover of the door, the first rotating shaft has a first pushing part arranged in the first chute, and the second rotating shaft has a first pushing part arranged in the second chute. The second pushing part in the second chute, the first pushing part is the first protrusion protruding on the first rotating shaft, and the second pushing part is the second protrusion protruding on the second rotating shaft; The elastic member is a compression spring.

As shown in Figure 12, an inner cylinder door lock tongue 601 is provided on the edge of the inner cylinder door 6 opposite to the inner cylinder door shaft, and an inner cylinder door lock hole 43 is correspondingly provided on the mouth edge of the inner cylinder 17, so that The inner cylinder door dead bolt 601 described above locks and cooperates with the inner cylinder door lock hole 43.

Further, it also includes an inner cylinder door handle 45, said inner cylinder door handle 45 is rotatably installed on the outer door cover, and the inner cylinder door handle 45 has a pushing end for pushing the inner cylinder door lock bolt to retract and unlock.

Further, the inner cylinder door 6 has a bolt installation groove, and the inner cylinder door bolt 601 is telescopically arranged in the bolt installation groove, and the inner cylinder door bolt and the bolt installation groove A compression spring 44 is arranged between them, and the middle part of the inner cylinder door handle is rotatably installed on the inner cylinder door. One end of the inner cylinder door handle is the pushing end acting on the inner cylinder door bolt, and the other end is the handle end; It acts on the handle end to drive the inner cylinder door handle to rotate, and the pushing end pushes the inner cylinder door lock bolt to retract and unlock with the rotation of the inner cylinder door handle.

Further, the lock tongue of the inner cylinder door has a fitting groove 605 , and the pushing end extends into the fitting groove 605 .

Preferably, the pushing end has a circular arc matching surface, and the inner wall of one side of the matching groove in contact with the pushing end is inclined.

As an implementation of this embodiment, the inner cylinder door 6 is provided with a position detection device for detecting whether the inner cylinder door is closed properly.

Embodiment four

This embodiment mainly solves the problem of how to accurately determine the water intake of a non-porous inner drum washing machine. The specific solution is as follows:

A drum washing machine, comprising an inner cylinder 17 and a water inlet pipeline connected with the inner cylinder 17, the inner cylinder 17 is a non-porous inner cylinder, which holds washing water when washing clothes, and the water inlet pipeline is arranged for A flow sensor 1 that detects the flow of incoming water.

In this embodiment, a flow sensor 1 is installed on the water inlet pipeline to monitor the flow rate of water intake. When the set water intake volume is reached, the water intake valve 20 is closed to complete the water intake. In this embodiment, the flow sensor is used to solve the water inflow problem of the non-porous inner drum washing machine according to the set water level, ensuring the washing effect, simple structure and convenient operation.

Further, the drum washing machine of this embodiment includes a water inlet valve 20 and a detergent box 3, the water inlet pipeline includes a first water inlet pipe and a second water inlet pipe, and the outlet end of the water inlet valve 20 passes through the first water inlet pipe It communicates with the detergent box 3, the outlet end of the detergent box 3 communicates with the inner cylinder 17 through the second water inlet pipe, and the flow sensor 1 is arranged on the first water inlet pipe or the second water inlet pipe.

Preferably, the flow sensor 1 is arranged on the first water inlet pipe, so that the detergent in the detergent box can enter the flow sensor 1 .

The drum washing machine in this embodiment includes a main controller 4, and the flow sensor 1 is electrically connected to the main controller 4 through a line. The main controller 4 can collect the water intake of the inner cylinder 17 in real time, and close the water intake valve 20 when the set water intake is reached.

As an implementation of this embodiment, the flow sensor 1 is a rotor flow sensor, or a turbine flow sensor, or an ultrasonic flow sensor, or an electromagnetic flow sensor, or an orifice flow sensor.

The flow sensor 1 can be installed at any position on the water inlet pipeline described in this embodiment, preferably at the rear of the water inlet valve 20, to accurately measure the flow of water entering the sealed inner cylinder 17, and the flow sensor 1 is connected to the main controller 4 , the main controller 4 can collect the water intake of the inner cylinder 17 in real time, and close the water intake valve 20 when the set water intake is reached.

In order to realize water inflow into the non-porous inner cylinder of this embodiment, the drum washing machine of this embodiment includes a drive motor 16 and an inner cylinder shaft 13, and the drive motor 16 drives the inner cylinder through the transmission connection between the inner cylinder shaft 13 and the inner cylinder 17. Tube 17 rotates, and there is the hollow channel 14 that communicates with inner tube 17 inside in described inner tube shaft 13, and described water inlet pipeline is connected with the hollow channel of inner tube shaft 13.

Specifically, the inner cylinder shaft 13 is connected to the drive motor 16, and the drive motor 16 includes a stator and a rotor, and the rotor is fixedly connected to the inner cylinder shaft 13; a through hole is provided at the center of the rotor, and the water inlet pipeline passes through The through hole of the rotor communicates with the hollow passage 14 of the inner cylinder shaft 13 .

Further, a first dynamic sealing structure 15 is provided between the water inlet pipeline and the through hole of the rotor, and a second sealing structure is provided between the through hole of the rotor and the hollow channel 14 of the inner cylinder shaft 13 .

In order to realize the drainage of the non-porous inner cylinder, the drum washing machine of this embodiment includes an outer cylinder 18, an inner cylinder drainage hole is provided on the side wall of the inner cylinder 17, and a normally closed check valve plug 11 is installed on the inner cylinder drainage hole. The ejector mechanism 10 for pushing the one-way valve plug 11 back to discharge water is installed on the outer cylinder 18 .

As an implementation of this embodiment, the outer cylinder 18 is also provided with a locking mechanism for locking the rotation of the inner cylinder 17. After the locking mechanism locks the inner cylinder, the ejector rod mechanism 10 pushes the one-way valve plug 11 top open to drain water.

As another implementation of this embodiment, a plurality of dehydration holes are provided on the side wall of the inner cylinder 17 in this embodiment, and centrifugal valves are installed on the dehydration holes. By controlling the inner cylinder to reach a certain speed, the centrifugal The valve is opened under the action of dehydration centrifugal force to perform washing drainage or dehydration drainage.

This embodiment also provides a control method for the drum washing machine. The washing machine executes the washing/rinsing program. During the water intake process, the flow sensor detects the water intake flow value in real time, and the washing machine calculates the water intake volume according to the water intake flow value and the water intake time. , when the water intake reaches the set water intake of the washing machine, the water intake will stop.

The drum washing machine is provided with multiple water inlet flow values that can be selected by the user, and the washing machine enters water according to the water inlet flow value selected by the user.

The drum washing machine has a function of weighing clothes, which can determine the flow value of water inflow according to the weight of clothes for water inflow.

Embodiment five

As shown in Figures 17-19, a drum washing machine in this embodiment includes an inner cylinder 17 and a water inlet pipeline. A water measuring device for measuring the water intake, the water inlet pipeline communicates with the water measuring device, and the water measuring device communicates with the inner cylinder.

The drum washing machine of this embodiment is provided with a water measuring device, and before entering the water into the inner tube 1, it enters the water measuring device for quantitative measurement, and determines the number of times the water measuring device measures water according to the set water level, thereby solving the problem of The non-porous inner drum washing machine ensures the washing effect according to the water inflow problem of the set water level, and has a simple structure and is easy to operate.

Further, the water measuring device described in this embodiment includes a water measuring tank 21, the water measuring tank 21 has a water inlet and a water outlet, the water inlet is connected to the water inlet pipeline, and the water outlet is connected to the inner cylinder 17; The water outlet control device that controls the water outlet to open when the water quantity in the equivalent water tank 21 reaches the set value.

As an implementation of this embodiment, as shown in Figure 17, the water measuring tank 21 is arranged at the bottom of the inner tube 17, and the water measuring device includes a water level detection device 22 for detecting the water measuring tank 21, The water outlet control device is a water tank drain pump 23, and the water tank drain pump 23 starts the water tank drain pump 23 when the water level detection device 22 detects that the water level in the water measuring water tank 21 reaches a set value to drain the water in the water measuring tank 21. Water is pumped into the inner cylinder 17.

As an implementation of this embodiment, as shown in Figure 18, the water measuring tank 21 is arranged on the top of the inner cylinder 17, and the water measuring device includes a water level detection device 22 for detecting the water measuring tank, so The water outlet control device described above is a water tank drain valve 25, and the water tank drain valve 25 is opened when the water level detection device 22 detects that the water level in the water measuring water tank 21 reaches a set value to discharge the water in the water measuring water tank 21 into the inner cylinder .

The water level detecting device 22 described in this embodiment is a liquid level sensor, and the liquid level sensor includes an air chamber and a sensor unit, and the air chamber communicates with the water measuring tank. Alternatively, the water level detection device 22 includes a plurality of water level detection probes arranged in the water measuring tank along its depth direction.

As an implementation of this embodiment, the water measuring water tank 21 is arranged on the upper part of the inner cylinder 17, the water outlet is arranged on the bottom wall of the water measuring water tank 21, and the water outlet control device is to keep the water outlet normally closed. When the water volume in the water tank reaches a certain value, the one-way valve of the water tank is opened under the water pressure and gravity, and the water in the water tank 21 is discharged into the inner cylinder 17, and then the one-way valve of the water tank is reset to keep the water outlet closed .

The water measuring tank 21 described in this embodiment is provided with an overflow hole 24, and the overflow hole 24 is connected with an overflow pipeline for leading out overflowing water in the water measuring tank.

Preferably, the drum washing machine includes a drain pipeline 8 , and the overflow pipeline communicates with the drain pipeline 8 .

As an implementation of this embodiment, as shown in FIG. 19 , the water measuring device includes a heating device 26 disposed in the water measuring tank 21 and a water temperature detection device for detecting the water temperature in the water measuring tank.

This embodiment also provides a control method for the drum washing machine. The washing machine executes the washing/rinsing program, and the washing machine controls the washing water to enter the measuring water tank. All the water in the water tank is discharged into the inner cylinder, and the water intake is started again to enter the water measuring tank, and the cycle is repeated until the water level in the inner cylinder reaches the set value, and the water intake is terminated.

Further, the washing machine controls the washing water to enter into the water measuring tank. When the water volume in the measuring water tank reaches the set value, the water intake is stopped, and the heating device is controlled to operate to heat the washing water. When the water temperature detecting device detects that the water temperature in the measuring water tank reaches When setting the value, all the water in the water measuring tank is discharged into the inner cylinder.

Embodiment six

This embodiment mainly solves the problem of how to ensure the unbalanced air pressure in the airtight compartment of the non-porous inner drum washing machine. Specifically, the sudden water cut-off of the solenoid valve, especially the water cut-off of the tap water pipe network, forms a negative pressure and returns the washing water in the airtight cabin Wash to the pipe network; or there is gas inside and it is difficult to enter the water.

As shown in Figures 20-22, a drum washing machine in this embodiment includes an inner cylinder 17, which is a non-porous inner cylinder, which holds washing water when washing clothes, and also includes an inner cylinder 17 for connecting the inner cylinder 17 with the outside world. The environment is an air pressure balance mechanism to balance the air pressure inside the inner cylinder.

When water enters, the gas in the airtight compartment of the inner cylinder can overflow through the equalizing mechanism under pressure to ensure air pressure balance.

When the water is suddenly cut off, the external atmosphere can quickly enter the sealed compartment of the inner cylinder, and destroy the suction, ensure the air pressure balance, and prevent the washing water from being sucked into the tap water pipe network.

For other things such as dehydration, the air pressure balance mechanism can also ensure the air pressure balance of the inner cylinder.

As an implementation of this embodiment, the air pressure balance mechanism includes a pressure equalization hole 27 arranged on the inner cylinder 17, and one end of the pressure equalization hole 27 communicating with the inside of the inner cylinder 17 is arranged on the inner cylinder 17 close to the rotation Central axis position and always higher than the highest water level position in the inner cylinder 17.

The drum washing machine of this embodiment includes a drive motor 16 and an inner cylinder shaft 13, the drive motor 16 drives the inner cylinder 17 to rotate through the transmission connection between the inner cylinder shaft 13 and the inner cylinder 17, and the pressure equalizing channel 27 is opened in the inner cylinder The shaft 13 communicates with the inside of the inner cylinder 17 and the external environment, and the highest water level in the inner cylinder 17 is lower than the inner cylinder shaft 13 . This can prevent the water in the inner cylinder from flowing out from the pressure equalizing hole.

The drum washing machine of this embodiment includes an outer cylinder 18, the inner cylinder 17 is arranged inside the outer cylinder 18, the water discharged in the inner cylinder 17 is discharged through the outer cylinder 18, and the mouth of the inner cylinder 17 is installed to close the inner cylinder of the inner cylinder. Tube door 6, the tube opening of described urceolus 18 is open, and one end of described pressure-equalizing hole 27 communicates with inner tube 17 inside, and the other end is arranged on urceolus 18 inside and communicates with it. Like this, prevent extreme situation, this hole effluent also can be collected in the outer cylinder 18.

Further, the side wall of the inner cylinder 17 described in this embodiment is provided with an inner cylinder drain hole, and a normally closed check valve plug 11 is installed on the inner cylinder drain hole, and the outer cylinder 18 is installed on the outer cylinder 18 for turning the check valve Plug 11 pushes away the ejector rod mechanism 10 for draining.

Preferably, the outer cylinder 18 is further provided with a locking mechanism for locking the rotation of the inner cylinder. After the locking mechanism locks the inner cylinder, the ejector mechanism pushes the one-way valve plug to drain water.

Further, the drum washing machine of this embodiment includes a water inlet pipeline, the inner cylinder shaft 13 has a hollow passage 14 communicating with the inside of the inner cylinder 17, and the water inlet pipeline communicates with the hollow passage 14 of the inner cylinder shaft 13 ; The pressure equalizing hole 27 and the hollow channel 14 are respectively communicated with the interior of the inner cylinder 17 and are isolated from each other. Like this, can guarantee that the gas in the airtight chamber of inner cylinder can discharge smoothly and keep the air pressure balance inside inner cylinder, prevent water inflow from being discharged directly by pressure equalizing hole 27 simultaneously and leak.

Specifically, the hollow channel 27 extends from one end to the other end along the central axis of the inner cylinder shaft, and the pressure equalizing channel includes a first channel segment and a second channel segment, and the first channel segment is arranged parallel to the hollow channel , one end of which communicates with the interior of the inner cylinder, one end of the second channel section communicates with the first channel section, and the other end extends to the outer peripheral wall of the inner cylinder shaft to communicate with the interior of the outer cylinder.

Preferably, the second channel section is arranged perpendicularly to the first channel section to form an L-shaped pressure equalizing channel.

Further, the inner cylinder shaft 13 is connected to the drive motor 16, the drive motor 16 includes a stator and a rotor, and the rotor is fixedly connected to the inner cylinder shaft; a through hole is provided at the center of the rotor, and the water inlet pipeline passes through the rotor The through hole communicates with the hollow channel of the inner cylinder shaft.

Preferably, a first dynamic sealing structure is provided between the water inlet pipeline and the through hole of the rotor, and a second sealing structure is provided between the through hole of the rotor and the hollow channel of the inner cylinder shaft.

In the drum washing machine described in this embodiment, a plurality of dehydration holes are provided on the side wall of the inner cylinder 17, and centrifugal valves are installed on the dehydration holes, and the centrifugal valves are opened under the action of dehydration centrifugal force for dehydration and drainage.

Embodiment seven

This embodiment mainly solves the problem of how to ensure the unbalanced air pressure in the airtight compartment of the non-porous inner drum washing machine. Specifically, the sudden water cut-off of the solenoid valve, especially the water cut-off of the tap water pipe network, forms a negative pressure and returns the washing water in the airtight cabin Wash to the pipe network; or there is gas inside and it is difficult to enter the water.

As shown in Figures 23-27, a drum washing machine in this embodiment includes an inner cylinder 17, which is a non-porous inner cylinder for holding washing water when washing clothes, and also includes an inner cylinder for communicating with the external environment. A pressurization mechanism and/or a pressure relief mechanism to balance the air pressure inside the inner cylinder 17.

The pressurization mechanism described in this embodiment includes a pressurization channel 28 and a negative pressure safety valve 29. The negative pressure safety valve 29 is arranged on the pressurization channel 28, and is used for single-use when the internal pressure of the inner cylinder 17 is lower than the atmospheric pressure of the external environment. Guide the pressurized hole 28, and the external environment gas enters the inside of the inner cylinder 17 by the boosted hole 28 to be pressurized until the internal air pressure of the inner cylinder 17 is balanced with the external environment air pressure, and the negative pressure safety valve 29 is closed.

The pressure relief mechanism described in this embodiment includes a pressure relief hole 30 and a positive pressure safety valve 31. The pressure relief hole 30 is set on the inner cylinder 17 near the central axis of rotation and is always higher than the highest point in the inner cylinder 17. Water level position, the positive pressure safety valve 31 is arranged on the pressure relief hole 30, and is used for the one-way conduction pressure relief hole 30 to perform pressure relief when the internal pressure of the inner cylinder 17 is greater than the atmospheric pressure of the external environment, until the internal pressure of the inner cylinder 17 is in line with the external environment. The ambient air pressure is balanced, and the positive pressure safety valve 31 is closed.

As shown in Figure 24, when water enters, the gas in the airtight chamber of the inner cylinder 17 is under pressure, and once it is greater than the set value of the positive pressure safety valve, the positive pressure safety valve opens and can overflow through the pressure relief hole to ensure air pressure balance .

As shown in Figure 24, when the water is suddenly cut off, the gas in the airtight compartment of the inner cylinder 17 is under pressure, and once it is less than the set value of the positive pressure safety valve, the external atmosphere can quickly enter the airtight compartment and destroy the back suction to ensure air pressure balance. Avoid washing water being sucked into the water pipe network.

For other things such as dehydration, the air pressure balance mechanism can also ensure the air pressure balance of the inner cylinder.

The drum washing machine of this embodiment includes a drive motor 16 and an inner tube shaft 13. The drive motor 16 drives the inner tube 17 to rotate through the transmission connection between the inner tube shaft 13 and the inner tube 17. The pressure hole 30 is provided on the inner cylinder shaft 13 to connect the interior of the inner cylinder 17 with the external environment, and the highest water level in the inner cylinder 17 is lower than the inner cylinder shaft 13 .

The drum washing machine of this embodiment includes an outer cylinder 18, the inner cylinder 17 is arranged inside the outer cylinder 18, the water discharged in the inner cylinder 17 is discharged through the outer cylinder 18, and the mouth of the inner cylinder 17 is installed to close the inner cylinder of the inner cylinder Door 6, the cylinder mouth of described urceolus 18 is open, and one end of described pressurization channel 28 and/or pressure relief channel 30 communicates with inner cylinder 17 inside, and the other end is arranged on urceolus 18 interior and communicates with it.

The drum washing machine of this embodiment includes a water inlet pipeline, the inner cylinder shaft 13 has a hollow channel 14 communicating with the inside of the inner cylinder 17, and the water inlet pipeline communicates with the hollow channel 14 of the inner cylinder shaft 13; The above-mentioned pressure relief channel 30 and the hollow channel 14 communicate with the inside of the inner cylinder 17 respectively and are arranged in isolation from each other.

As shown in Figure 24 and Figure 25, the hollow channel 14 extends from one end to the other end along the central axis of the inner cylinder shaft 13, and the pressure relief channel 30 includes a first channel section and a second channel section, the first The tunnel section is arranged parallel to the hollow channel, one end of which communicates with the interior of the inner cylinder, one end of the second tunnel section communicates with the first tunnel section, and the other end extends to the outer peripheral wall of the inner cylinder shaft to communicate with the interior of the outer cylinder;

Preferably, the second tunnel section is arranged perpendicularly to the first tunnel section to form an L-shaped pressure relief tunnel.

The drum washing machine of this embodiment includes a water inlet pipeline, the inner cylinder shaft 13 has a hollow channel 14 communicating with the inside of the inner cylinder 17, and the water inlet pipeline communicates with the hollow channel 14 of the inner cylinder shaft 13; Said pressurization hole 28 communicates with hollow channel 14.

Further, the hollow passage 14 extends from one end to the other end along the central axis of the inner cylinder shaft 13 , one end of the pressurized hole 28 communicates with the hollow passage 14 , and the other end extends to the outer circumference of the inner cylinder shaft 13 The wall communicates with the inside of the outer cylinder 18 .

Preferably, the pressurization hole 28 and the hollow channel 14 are arranged perpendicular to each other.

The inner cylinder shaft described in this embodiment is connected to the driving motor, the driving motor includes a stator and a rotor, and the rotor is fixedly connected to the inner cylinder shaft; a through hole is set at the center of the rotor, and the water inlet pipeline passes through the through hole of the rotor It communicates with the hollow channel of the inner cylinder shaft.

Preferably, a first dynamic sealing structure is provided between the water inlet pipeline and the through hole of the rotor, and a second sealing structure is provided between the through hole of the rotor and the hollow channel of the inner cylinder shaft.

As shown in Figure 26 and Figure 27, the pressurization channel 28 and the pressure relief channel 30 are both arranged on the inner cylinder shaft 13, and the openings for communicating with the atmosphere are all inside the outer cylinder 18; The inner side of the water inlet channel 14 of the shaft 13.

It is conceivable that the preferred pressurization channels 28 and pressure relief channels 30 are all arranged on the inner cylinder shaft 13, and the openings communicating with the atmosphere are all inside the outer cylinder 18;

The above-mentioned embodiments can be implemented independently or in combination with each other.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with the technology of this patent Without departing from the scope of the technical solution of the present invention, personnel can use the technical content of the above prompts to make some changes or modify them into equivalent embodiments with equivalent changes. In essence, 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 (7)

1. A drum washing machine, comprising:

the inner cylinder is a nonporous inner cylinder;

an inner cylinder door which can be opened/closed and is arranged on a cylinder opening of the inner cylinder;

a sealing device is arranged between the opening of the inner cylinder and the inner cylinder door, the opening of the inner cylinder is kept sealed and closed by the sealing device when the inner cylinder door is closed, the inner cylinder and the inner cylinder door form an independent washing chamber together, and washing water is independently contained when washing clothes;

The sealing device comprises a radial sealing device for sealing along the radial direction of the inner cylinder, the radial sealing device comprises a radial sealing element, and the radial sealing element is arranged on the outer peripheral wall of the inner cylinder door and comprises a deformation part;

the radial sealing matching part is an annular groove arranged on the inner wall of the edge of the nozzle of the inner cylinder; the deformation part is bent to enter the annular groove when the inner barrel door is closed, and the deformation part is kept in sealing contact with the annular groove for radial sealing;

the deformation part is a deformation fin made of elastic materials, the deformation fin is arranged on the peripheral wall of the inner barrel door, the radial height of the annular fin is larger than the interval between the periphery of the inner barrel door and the inner wall of the barrel opening of the inner barrel, and the axial thickness of the deformation fin is smaller than the width of the notch of the annular groove;

the drum washing machine also comprises a water measuring device for measuring water inflow, the water inlet pipeline is communicated with the water measuring device, and the water measuring device is communicated with the inner barrel;

the sealing device comprises an axial sealing device for sealing along the central axis direction of the inner cylinder, the axial sealing device comprises an axial sealing element arranged on the inner cylinder door/on the edge of the cylinder opening of the inner cylinder and an axial sealing matching part correspondingly arranged on the edge of the cylinder opening of the inner cylinder/on the inner cylinder door, and the axial sealing element is kept in sealing contact with the axial sealing matching part along the central axis direction of the inner cylinder;

The axial sealing element comprises a bending part and a sealing part, wherein the axial sealing matching part is an annular sinking groove, the axial sealing element further comprises a base part, one end of the bending part is connected with the base part, the other end of the bending part is connected with the sealing part, the base part is an annular base block, the bending part is provided with at least one bending arm along the central axis direction of the inner cylinder, and the sealing part comprises a sealing contact surface which is parallel to the bottom wall of the annular sinking groove;

the water measuring device comprises a water measuring tank, the water measuring tank is provided with a water inlet and a water outlet, the water inlet is communicated with the water inlet pipeline, the water outlet is communicated with the inner barrel, and a water outlet control device for controlling the water outlet to be opened when the water quantity in the equivalent water measuring tank reaches a set value is arranged on the water outlet;

the water outlet is arranged on the bottom wall of the water tank, the water outlet control device is a water tank one-way valve which keeps the water outlet normally closed, when the water amount in the equivalent water tank reaches a certain value, the water tank one-way valve is opened under the gravity of water pressure, and the water tank one-way valve is reset to keep the water outlet closed after the water in the water tank is discharged into the inner cylinder;

the water measuring device comprises a heating device arranged in the water measuring water tank and a water temperature detecting device for detecting the water temperature in the water measuring water tank;

The overflow hole is arranged on the water tank and is connected with an overflow pipeline for guiding out the overflowed water in the water tank; the drum washing machine comprises a drainage pipeline, and the overflow pipeline is communicated with the drainage pipeline;

the drum washing machine comprises an outer drum, wherein an inner drum drain hole is formed in the side wall of the inner drum, a normally closed one-way valve plug is arranged on the inner drum drain hole, and a push rod mechanism for pushing the one-way valve plug open to drain is arranged on the outer drum; the outer cylinder is also provided with a locking mechanism for locking the rotation of the inner cylinder, and the locking mechanism pushes the one-way valve plug open by the ejector rod mechanism after the inner cylinder is locked by the locking mechanism to drain water; the side wall of the inner cylinder is provided with a plurality of dehydration holes, centrifugal valves are arranged on the dehydration holes, a certain rotating speed is achieved by controlling the inner cylinder, and the centrifugal valves are opened to wash or dehydrate under the action of dehydration centrifugal force.

2. The drum type washing machine as claimed in claim 1, wherein the axial sealing member is installed on the inner drum door, and includes a bent portion and a sealing portion; the axial sealing matching part is an annular sinking groove arranged on the edge of the cylinder opening of the inner cylinder; the bending part is bent and deformed to apply force on the sealing part when the inner barrel door is closed, and the sealing part is kept in sealing contact with the annular sinking groove to axially seal.

3. The drum type washing machine as claimed in claim 2, wherein the inner drum door is provided with an annular installation groove, and the base is installed in the annular installation groove.

4. A drum washing machine as claimed in claim 3, wherein the base, the bent portion and the sealing portion are integrally formed.

5. The drum washing machine as claimed in any one of claims 1 to 4, wherein the radial seal member is held in sealing contact with the radial seal engagement portion in a radial direction of the inner tub.

6. The drum type washing machine as claimed in claim 5, wherein the axial sealing member and the radial sealing member are both of an annular structure, the axial sealing engagement portion is disposed on the entire circumference of the rim of the nozzle of the inner drum, the radial sealing engagement portion is disposed on the entire circumference of the rim of the nozzle of the inner drum, the axial sealing member is in sealing contact with the axial sealing engagement portion to achieve axial sealing on the entire circumference, and the radial sealing member is in sealing contact with the radial sealing engagement portion to achieve radial sealing on the entire circumference.

7. The drum type washing machine as claimed in claim 5, wherein the inner drum door includes a door outer cover closing the drum opening of the inner drum and a door inner cover extending inward of the inner drum in an axial direction of the inner drum;

The axial sealing element is arranged on the inner wall surface of one side of the door outer cover, which is close to the cylinder opening of the inner cylinder, and the annular sinking groove is formed by sinking the outer wall of the edge of the cylinder opening of the inner cylinder towards the inner part of the inner cylinder; the radial sealing element is arranged on the outer peripheral wall of the door inner cover, and the annular groove is arranged on the inner peripheral wall of the edge of the nozzle of the inner cylinder.

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