WO2022222880A1

WO2022222880A1 - Front-loading washing machine

Info

Publication number: WO2022222880A1
Application number: PCT/CN2022/087347
Authority: WO
Inventors: 吕艳芬; 许升
Original assignee: 青岛海尔滚筒洗衣机有限公司; 海尔智家股份有限公司
Priority date: 2021-04-19
Filing date: 2022-04-18
Publication date: 2022-10-27
Also published as: CN115216933A

Abstract

Disclosed in the present invention is a front-loading washing machine, comprising an outer tub and an inner tub coaxially provided in the outer tub. A main drain port is formed on the inner tub; a drain valve is provided at the main drain port; a drain valve opening mechanism is further comprised; the outer tub is provided with a mounting structure for mounting the drain valve opening mechanism; and a water seal structure is provided between the mounting structure and the drain valve opening mechanism. By means of the provided water seal structure, the present invention can effectively prevent safety accidents caused by the overflow of water in the outer tub from a mounting gap between the mounting structure and the drain valve opening mechanism to an electric element inside the washing machine or to the ground, thereby improving the use safety and reliability of the washing machine.

Description

A drum washing machine

technical field

The invention belongs to the technical field of clothing treatment equipment, and in particular relates to a drum washing machine.

Background technique

In the prior art, a drum washing machine generally includes an inner tub and an outer tub that are fitted with each other, the outer tub is sealed for holding water, and the inner tub is used for storing clothes, and the inner tub is rotated to beat and wash the clothes. At the same time, the inner cylinder is provided with a main drain, and the main drain is provided with a drain that normally seals the main drain. The corresponding outer cylinder is provided with a drain valve opening mechanism for opening the drain valve. After the washing procedure is completed, the drain valve is opened by the outer barrel controlling the drain valve opening mechanism, so that the water in the inner cylinder flows out through the drain outlet to the outside. cartridge, and discharge.

The outer tub of the existing drum washing machine is provided with a mounting structure for installing the drain valve opening mechanism, however, there is no effective water sealing structure between the mounting structure and the drain valve opening mechanism, which causes the water in the outer tub to escape from the drain valve. The gap between the installation structure and the opening mechanism of the drain valve overflows to the electrical components inside the washing machine or to the ground, causing related safety accidents.

For example, the invention patent with the application number of 201910472264.X discloses a clothing treatment equipment, including an inner cylinder, a drainage assembly and a driving device; the inner cylinder can hold water, and a drainage hole is formed on the inner cylinder; the drainage assembly includes a sealing member, a rotating member and a torsion spring, the rotating member has a rotation center, and the rotating member can drive the sealing member to switch between a sealing position for sealing the drainage hole and an avoidance position for avoiding the drainage hole. By driving the rotating member to rotate around the rotation center by the driving device, the sealing member can be switched between the sealing position and the avoidance position, so as to realize the drainage of the inner cylinder.

The driving device in the above application includes a lever assembly mounted on the rear wall of the outer cylinder, and the lever assembly includes a lever and a power unit for driving the lever to move. Since there is no effective water sealing structure between the lever assembly and the outer cylinder, when the inner cylinder is draining water, the water entering the outer cylinder will overflow through the installation gap between the lever assembly and the outer cylinder, causing related safety accidents. There are high security risks.

In view of this, the present invention is proposed.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a drum washing machine, which can effectively avoid the water in the outer tub from the installation gap between the installation structure and the drain valve opening mechanism through the provided water sealing structure. It overflows to the electrical components inside the washing machine or on the ground, causing related safety accidents and improving the safety and reliability of the washing machine.

In order to solve the above-mentioned technical problems, the basic conception of the technical scheme adopted in the present invention is:

A drum washing machine comprises an outer cylinder and an inner cylinder coaxially arranged in the outer cylinder, the inner cylinder is provided with a main drain, and the main drain is provided with a drain valve;

It also includes a drain valve opening mechanism, the outer cylinder is provided with a mounting structure for installing the drain valve opening mechanism, and a water sealing structure is arranged between the mounting structure and the drain valve opening mechanism.

Further, the main water outlet is arranged on the rear wall of the inner cylinder, and the mounting structure includes a mounting flange correspondingly arranged on the rear wall of the outer cylinder;

The drain valve opening mechanism includes a drive mechanism and a push rod mechanism that retracts back and forth under the drive of the drive mechanism, and the water sealing structure is arranged between the mounting flange and the push rod mechanism.

Further, the mounting flange has a cylindrical flange body, and the ejector mechanism includes a guide bushing arranged in the flange body, and a top that can be retracted back and forth along the hollow passage inside the guide bushing. rod;

The flange body has a first end close to the rear wall of the inner cylinder and a second end away from the rear wall of the inner cylinder, and the water sealing structure includes a connection between the front end peripheral wall of the ejector rod and the first end of the flange body the first sealing sleeve;

Preferably, the water sealing structure further comprises a second sealing sleeve connected between the peripheral wall of the front end of the ejector rod and the second end of the flange body;

More preferably, the first sealing sleeve and the second sealing sleeve are integrally provided.

Further, the guide bushing comprises a hollow guide portion located in the mounting flange, and an annular fixing portion formed by extending outward from the edge of the end portion of the hollow guide portion away from the rear wall side of the inner cylinder;

The annular fixing portion is connected and fixed with the rear wall of the outer cylinder, and the annular fixing portion is limited and fixed between the second end of the flange body and the rear wall of the outer cylinder;

One end of the second sealing sleeve is connected to the peripheral wall of the front end of the ejector rod, and the other end is sealed and connected to the fitting gap between the second end of the flange body and the annular fixing portion.

Further, the rear wall of the outer cylinder is provided with a mounting port for installing the mounting flange, and the outer periphery of the mounting port is provided with an annular clamping table;

a flanging structure in which the outer periphery of the annular fixing portion of the guide bushing is bent in a direction close to the rear wall of the outer cylinder and then folded inward, and the flanging structure is clamped on the outer wall surface of the annular clamping table;

The mounting flange has a T-shaped clamping portion that is clamped on the annular clamping table, and the flange structure is clamped and limited between the T-shaped clamping portion, the annular clamping table, and the rear wall of the outer cylinder. within the interstitial space formed.

Further, a first limiting space is formed between the T-shaped clamping portion and the annular clamping table, and a sealing ring is arranged in the first limiting space;

A second limiting space is formed between the T-shaped clamping portion and the annular fixing portion, and one end of the second sealing sleeve is squeezed and limited in the second limiting space.

Further, an annular boss is fixed on the peripheral wall of the front end of the ejector rod, and the first end of the first sealing sleeve and the first end of the second sealing sleeve are respectively connected to the annular boss;

Preferably, the first end of the first sealing sleeve is integrally connected with the first end of the second sealing sleeve, and an annular joint portion that can abut on the annular boss is formed;

An elastic member is arranged outside the guide shaft sleeve, and the elastic member is compressed and abutted between the annular fixing portion and the annular joint portion, so that the first ends of the first sealing sleeve and the second sealing sleeve are in contact with each other. tightly abutting on the annular boss;

More preferably, the annular boss is an annular rubber ring that is fixed in position or tightly wrapped around the outer periphery of the ejector rod.

Further, the main water outlet is provided at a position close to the outer peripheral side on the rear wall of the inner cylinder;

The outer cylinder includes a peripheral side wall and a rear wall, and the rear wall of the outer cylinder has an installation area for installing the drain valve opening mechanism;

Taking the horizontal plane where the central axis of the outer cylinder is located as a dividing plane, the rear wall of the outer cylinder is divided into an upper area and a lower area, and the installation area of the drain valve opening mechanism is located in the lower area of the rear wall of the outer cylinder.

Further, a horizontal X-axis and a vertical Y-axis are established with the center of the rear wall of the outer cylinder as the center of the circle;

Set the angle formed by the drain valve opening mechanism and the negative Y axis clockwise or counterclockwise as β, where: β is between 0-80°.

Preferably, the β range is 0-10°;

More preferably, β=0°, and the drain valve opening mechanism is installed on the rear wall of the outer cylinder at a position corresponding to the bottom of the rear wall of the inner cylinder.

Further, the drive mechanism includes a rotary motor, the output shaft of the rotary motor is fixedly connected with an eccentric wheel and drives it to rotate, and the output end of the eccentric wheel is connected to the ejector mechanism and drives the front and rear extension and retraction thereof;

Preferably, the drum washing machine further comprises an inner tub locking and positioning mechanism for controlling the locking of the inner tub, and the inner tub locking and positioning mechanism is used to lock the inner tub at a set position when draining water, and then the drain valve is controlled to open. The mechanism opens the drain valve.

After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

1. The present invention can effectively prevent the water from overflowing from the gap between the mounting flange and the drain valve opening mechanism to the electrical components inside the washing machine or through the water sealing structure arranged between the mounting flange and the drain valve opening mechanism. On the ground, the sealing of the outer cylinder is ensured, and the safety and reliability of the washing machine are improved.

2. The present invention provides a drum washing machine, and the water sealing structure includes a first sealing sleeve connected between the first end of the flange body and the ejector rod and a second sealing sleeve connected between the second end of the flange body and the ejector rod, The gap between the mounting flange and the opening mechanism of the drain valve is sealed by double sealing, and the sealing effect is better, which can effectively block the water in the outer cylinder from the ejector rod and the mounting flange, or the ejector rod and the guide bushing The gap between them overflows, causing related safety accidents.

3. The present invention provides a drum washing machine. By arranging the drain valve opening mechanism in the lower area of the outer tub, the fluency and completeness of the main drainage are ensured, and the water in the inner tub can be completely discharged through the main drainage port in the main drainage stage, reducing the drain. There are problems such as large vibration caused by too much water in the load during discharge. At the same time, the drain valve opening mechanism is installed in the lower area of the rear wall of the outer cylinder, which is convenient for maintenance and installation by staff.

The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Description of drawings

The accompanying drawings, as a part of the present invention, are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings in the following description are only some embodiments, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort. In the attached image:

Fig. 1 is the front side view of the drum washing machine in the embodiment of the present invention;

Fig. 2 is A-A direction sectional view in Fig. 1;

3 is a partial view of the drum washing machine after removing the casing in the embodiment of the present invention;

Fig. 4 is an enlarged view at B in Fig. 3;

5 is a schematic diagram of the installation position of the drain valve opening mechanism in the embodiment of the present invention;

In the picture:

1. Inner cylinder; 101. Peripheral wall of inner cylinder; 102. Rear wall of inner cylinder; 11. Main drain outlet; 12. Drain valve; 13. Lifting ribs; 14. Centrifugal valve; 15. Inner cylinder door;

2. Outer cylinder; 201, Peripheral wall of outer cylinder; 202, Rear wall of outer cylinder; 2021, Mounting port; 2022, Ring-shaped clamping table; 21, Mounting flange; 22, T-shaped clamping part; 23, Sealing ring; 24, outer cylinder door;

3. Water sealing structure; 31, first sealing sleeve; 32, second sealing sleeve; 33, annular joint; 34, annular boss; 35, elastic part;

4. Drain valve opening mechanism;

41, drive mechanism; 411, rotary motor; 412, motor bracket; 413, eccentric;

42, ejector mechanism; 421, guide bushing; 4211, hollow guide part; 4221, annular fixed part; 42211, flanging structure; 422, ejector rod;

5. Delivery box; 6. Chassis; 61. Door; 7. Water inlet pipe; 8. Motor shaft; 9. Drainage device; 91. Drainage pipe; 10. Water inlet valve; 20. Drive motor; 30. Dynamic seal structure.

It should be noted that these drawings and written descriptions are not intended to limit the scope of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used to illustrate the present invention , but are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "inside", The orientation or positional relationship indicated by "outside" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, It is constructed and operated in a particular orientation and is therefore not to be construed as a limitation of the present invention.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection, Or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

The present invention will be further described in detail below in conjunction with the embodiments.

As shown in FIGS. 1 to 5 , this embodiment provides a drum washing machine, which includes an outer tub 2 and an inner tub 1 coaxially arranged in the outer tub 2 . The inner tub 1 adopts a non-porous inner tub 1 . There are no water-permeable holes on the drum 1, and the washing water is stored independently when washing clothes. There is no need to fill the washing/rinsing water between the inner drum 1 and the outer drum 2, which greatly reduces the washing water consumption of the washing machine and avoids the inner drum 1. The possibility of dirt adhesion with the outer cylinder 2 greatly improves the user's health and user experience, and greatly saves water resources.

The inner cylinder 1 is provided with a dehydration hole, and the dehydration hole is provided with a centrifugal valve 14 that seals the dehydration hole under normal conditions. During the dehydration process, the washing machine rotates at a high speed, and the centrifugal valve 14 is opened under the action of centrifugal force. The dehydration hole is subjected to centrifugal dehydration.

As shown in FIG. 1 and FIG. 2 , the front-loading washing machine of this embodiment has a casing 6, and the casing 6 includes: a top panel, a front panel, a back panel and a bottom plate, and feet are installed and fixed on the bottom plate to support the entire washing machine . The casing 6 has an outer cylinder 2 inside, and an inner cylinder 1 is coaxially arranged in the outer cylinder 2 . The inner cylinder 1 is provided with a main drain port 11 , and a drain valve 12 is provided at the main drain port 11 . The main purpose of the outer cylinder 2 is to collect the main drainage of the inner cylinder 1 and the drainage of the inner cylinder 1 high-speed centrifugal dehydration. The outer cylinder 2 is provided with a drainage device 9 for discharging the drain water collected in the outer cylinder 2 , and the drainage device 9 communicates with the floor drain and the like through a drainage pipe 91 .

During the washing process, the inner drum 1 rotates, and preferably, a lifting rib 13 is provided in the inner drum 1 to continuously lift and drop the clothes, so as to wash the clothes. The inner cylinder 1 has a non-porous structure. The outer tub 2 has a central mounting hole, and a bearing is installed and fixed. The motor shaft 8 fastened to the inner tub 1 passes through the bearing and is connected to a driving motor 20, which drives the inner tub 1 to rotate to wash clothes.

In this embodiment, the motor shaft 8 is a hollow shaft, and the water outlet end of the water inlet pipe 7 of the washing machine is rotatably and sealedly connected to the hollow shaft through the dynamic sealing structure 30 , and water is fed into the inner cylinder 1 through the motor shaft 8 . The inlet end of the water inlet pipe 7 is provided with a water inlet valve 10 for controlling the opening and closing of the water inlet. 5 is connected to inject additives into the washing machine.

In this embodiment, an openable/closable inner cylinder door 15 is installed on the cylinder opening at the front of the inner cylinder 1, thereby realizing that the inner cylinder 1 is a sealed cabin structure. An openable/closable outer cylinder door 24 is installed on the front cylinder opening of the outer cylinder 2 , and an openable/closable machine door 61 is installed on the casing 6 .

Further, the washing machine provided in this embodiment further includes a drain valve opening mechanism 4 , the outer tub 2 is provided with a mounting structure for installing the drain valve opening mechanism 4 , and the mounting structure is connected to the drain valve opening mechanism 4 . A water sealing structure 3 is arranged therebetween.

The water sealing structure provided in this embodiment can effectively prevent the water in the outer cylinder from overflowing from the installation gap between the installation structure and the drain valve opening mechanism to the electrical components inside the washing machine or on the ground, causing related safety accidents and improving the washing machine. Safe and reliable use.

Further, as shown in FIGS. 3 and 4 , the inner cylinder 1 includes an inner cylinder peripheral wall 101 and an inner cylinder rear wall 102 , the main drain 11 is arranged on the inner cylinder rear wall 102 , and the installation structure includes corresponding A mounting flange 21 is provided on the rear wall of the outer cylinder 2 . The drain valve opening mechanism 4 is correspondingly installed in the mounting flange 21 .

Specifically, the rear wall 202 of the outer cylinder is provided with a mounting port 2021 for mounting the mounting flange 21 at a position corresponding to the main drain port 11, and the mounting flange 21 is fixedly arranged on the mounting port 2021, Alternatively, the peripheral edge of the mounting opening 2021 extends toward the rear wall 102 of the inner cylinder to form the mounting flange 21 .

In this embodiment, the drain valve opening mechanism 4 includes a drive mechanism 41 and a push rod mechanism 42 that can be retracted back and forth under the drive of the drive mechanism 41. The water seal structure 3 is provided on the mounting flange 21 and the push rod. Between institutions 42. The ejector mechanism 42 can move back and forth along the inner space of the mounting flange 21 under the drive of the drive mechanism 41 , and the ejector mechanism 42 can push the drain valve 12 to open the main drain when it moves forward. The drain 11 is drained, and the inner cylinder 1 stops draining when the ejector mechanism 42 is retracted backwards.

Further, the mounting flange 21 has a cylindrical flange body, and the ejector mechanism 42 includes a guide bushing 421 disposed in the flange body and a hollow channel along the interior of the guide bushing 421 Front and rear retractable top rods 422, the top rods 422 have a certain axial extension length.

Further, as shown in FIG. 4 , the flange body has a first end that is close to the rear wall 102 of the inner cylinder and a second end that is far away from the rear wall 102 of the inner cylinder. The first sealing sleeve 31 between the peripheral wall of the front end and the first end of the flange body. The first sealing sleeve 31 is an elastic bellows with a certain shrinkage performance, so as to realize the connection between the moving ejector rod 422 and the stationary mounting flange 21 . The provided first sealing sleeve 31 can effectively prevent the drain water collected in the outer cylinder 2 from overflowing from the gap between the mounting flange 21 and the ejector rod 422 .

Preferably, in this embodiment, the water sealing structure 3 further includes a second sealing sleeve 32 connected between the peripheral wall of the front end of the top rod 422 and the second end of the flange body. The gap between the mounting flange 21 and the drain valve opening mechanism 4 is sealed by a double sealing method, and the sealing effect is better, which can effectively prevent the water in the outer cylinder 2 from being transmitted from the ejector rod 422 to the mounting flange 21 or the ejector. The gap between the rod 422 and the guide bushing 421 overflows, causing a related safety accident.

More preferably, the first sealing sleeve 31 and the second sealing sleeve 32 are integrally provided, specifically, the first sealing sleeve 31 and the second sealing sleeve 32 are connected with the end of the front end peripheral wall of the ejector rod 422. . The first sealing sleeve 31 and the second sealing sleeve 32 are integrally arranged, which simplifies the overall structure of the water sealing structure 3 .

In this embodiment, the water sealing structure 3 includes a first sealing sleeve 31 connected between the first end of the flange body and the top rod 422 and a second seal connected between the second end of the flange body and the top rod 422 The sleeve 32 adopts a double sealing method to seal the gap between the installation flange 21 and the drain valve opening mechanism 4, and the sealing effect is better, which can effectively prevent the water in the outer cylinder 2 from being separated from the ejector rod 422 and the installation flange 21. , or the gap between the ejector rod 422 and the guide bushing 421 overflows, causing a related safety accident.

Further, the guide bushing 421 includes a hollow guide portion 4211 located in the mounting flange 21, and an annular fixing portion 4221 formed by extending outward from the edge of the end portion of the hollow guide portion 4211 away from the rear wall 102 of the inner cylinder. . The hollow guide portion 4211 is in the shape of a sleeve, and has a hollow guide channel inside for the push rod 422 to move back and forth.

Further, as shown in FIG. 3 and FIG. 4 , the annular fixing portion 4221 is connected and fixed with the rear wall 202 of the outer cylinder, and the annular fixing portion 4221 is limited and fixed on the second end of the flange body and the rear of the outer cylinder. between the walls 202 .

One end of the second sealing sleeve 32 is connected to the peripheral wall of the front end of the ejector rod 422, and the other end is sealedly connected to the fitting gap between the second end of the flange body and the annular fixing portion 4221. A sealed space is formed between the second sealing sleeve 32 and the ejector rod 422 to prevent the washing water in the outer cylinder 2 from entering the second sealing sleeve 32 and overflowing from the gap between the guide shaft sleeve 421 and the ejector rod 422 .

Further, as shown in FIG. 4 , the rear wall 202 of the outer cylinder is provided with an installation opening 2021 for installing the installation flange 21 , and the outer peripheral edge of the installation opening 2021 close to the outer side of the rear wall 202 of the outer cylinder is provided with a protruding An annular clamping table 2022 on the outer wall surface of the rear wall 202 of the outer cylinder. The outer periphery of the annular fixing portion 4221 of the guide bushing 421 is bent in a direction close to the rear wall 202 of the outer cylinder and then folded inward to form a ring-shaped flanging structure 42211. The inner peripheral end wall of the flanging structure 42211 Connected to the outer wall surface of the annular clamping table 2022 .

Specifically, as shown in FIG. 4 , the annular fixing portion 4221 includes an annular supporting wall, and the outer peripheral edge of the annular supporting wall is bent in a direction close to the rear wall 202 of the outer cylinder to form a first folded wall. The end edge of the first folded wall is folded toward the inner center to form a second folded edge, and the inner peripheral edge of the second folded edge abuts on the outer peripheral wall surface of the annular clamping table 2022 .

Further, the mounting flange 21 has a T-shaped clamping portion 22 that is clamped on the annular clamping table 2022, and the T-shaped clamping portion 22 includes a peripheral edge formed by the second end of the flange body. An annular connecting wall formed by extending outward, and an annular clamping wall connected to the outer peripheral edge of the annular connecting wall. The annular clamping wall is parallel to the peripheral wall of the flange body, and the annular connecting wall is perpendicular to the peripheral wall of the flange body, so that the annular connecting wall and the annular clamping wall form a T-shaped cross-section. Snap portion 22 . The mounting flange 21 adopts the T-shaped clamping part 22 to realize the assembly connection with the guide shaft sleeve 421 and the outer cylinder 2 , the clamping is more stable, and the assembly efficiency is higher.

As shown in FIG. 4 , the end of the annular clamping wall of the T-shaped clamping portion 22 close to the rear wall 202 of the outer cylinder is clamped on the annular clamping table 2022 , and the other end is clamped on the annular fixing portion 4221, the flanging structure 42211 is clamped and limited in the clearance space formed between the T-shaped clamping portion 22, the annular clamping table 2022, and the rear wall 202 of the outer cylinder. Through the above-mentioned cooperation, a more stable and firm cooperation can be formed between the guide bushing 421 , the mounting flange 21 and the rear wall 202 of the outer cylinder.

Further, a first limiting space is formed between the T-shaped clamping portion 22 and the annular clamping table 2022 , and a sealing ring 23 is disposed in the first limiting space.

Specifically, the first limiting space is formed between a side wall surface of the T-shaped clamping portion 22 and the outer peripheral end wall of the annular clamping table 2022, and the sealing ring 23 is squeezed and arranged in the first limiting space Inside, the sealing ring 23 is provided to form a seal between the installation flange 21 and the installation port 2021 of the rear wall 202 of the outer cylinder, which can effectively prevent the water in the outer cylinder 2 from being passed between the installation flange 21 and the outer cylinder 2. Gap overflow.

Further, a second limiting space is formed between the other side wall surface of the T-shaped clamping portion 22 and the annular fixing portion 4221 , and one end of the second sealing sleeve 32 is squeezed and limited in the first position. In the two limited spaces, a seal is formed.

Specifically, the second limiting space is formed between the annular supporting wall of the annular fixing portion 4221 and the T-shaped clamping portion 22 , and one end of the second sealing sleeve 32 is connected to the peripheral wall of the front end of the ejector rod 422 The other end is squeezed and limited to form a seal in the second limited space.

Further, as shown in FIG. 4 , an annular boss 34 is fixed on the peripheral wall of the front end of the ejector rod 422 , and the first end of the first sealing sleeve 31 and the first end of the second sealing sleeve 32 are respectively connected to on the annular boss 34 .

Preferably, the first end of the first sealing sleeve 31 is integrally connected with the first end of the second sealing sleeve 32 , and an annular joint portion 33 that can abut on the annular boss 34 is formed.

An elastic member 35 is disposed outside the guide shaft sleeve 421, and the elastic member 35 is compressed and abutted between the annular fixing portion 4221 and the annular joint portion 33, so that the first sealing sleeve 31, the second sealing sleeve 31, the second The first end of the sealing sleeve 32 is tightly abutted on the annular boss 34 .

The elastic member 35 is a compression spring sleeved outside the guide shaft sleeve 421 , one end of the compression spring is compressed and abutted on the annular support wall of the annular fixing portion 4221 , and the other end is abutted on the water sealing structure 3 . on the ring joint part 33.

Preferably, the annular boss 34 is an annular rubber ring that is limitedly fixed or tightly wrapped around the outer circumference of the ejector rod 422 . By adopting the above solution, the annular boss 34 can also play a sealing role while playing a limiting role, which can further enhance the sealing effect between the top rod 422 and the mounting flange 21 .

More preferably, the annular boss 34 is integrally provided with the first sealing sleeve 31 and the second sealing sleeve 32 , the annular boss 34 has good elasticity, and is tightly wrapped or limited and fixed on the A seal is formed on the outer peripheral wall of the ejector rod 422 .

Of course, the annular boss 34 can also be a boss structure that is fixedly arranged on the outer periphery of the top rod 422 , and the first ends of the first sealing sleeve 31 and the second sealing sleeve 32 are tightly abutted under the action of the elastic member 35 . Connected and limited on the annular boss 34 .

Further, as shown in FIG. 3 and FIG. 5 , the main drainage port 11 is opened on the rear wall 102 of the inner cylinder at a position close to the outer peripheral side, so as to improve the thoroughness of drainage. The outer cylinder 2 includes an outer cylinder peripheral wall 201 and an outer cylinder rear wall 202 , and the rear wall of the outer cylinder 2 has an installation area for installing the drain valve opening mechanism 4 .

As shown in FIGS. 3 and 5 , taking the horizontal plane where the central axis of the outer cylinder 2 is located as the dividing plane, the rear wall 202 of the outer cylinder is divided into an upper area and a lower area, and the installation area of the drain valve opening mechanism 4 is located at in the lower region of the rear wall 202 of the outer cylinder.

Further, as shown in FIG. 5 , a horizontal X-axis and a vertical Y-axis are established with the center of the rear wall 202 of the outer cylinder as the center of the circle. The angle formed by the drain valve opening mechanism 4 and the negative Y axis clockwise or counterclockwise is set as β, where β is between 0-80°.

Preferably, the β range is 0-10°.

More preferably, β=0°, the drain valve opening mechanism 4 is installed on the rear wall 202 of the outer cylinder corresponding to the bottom position of the rear wall 102 of the inner cylinder.

Further, as shown in FIG. 3 to FIG. 5 , the drain valve 12 is a valve plug provided in the main drain port 11 with a one-way seal, and the valve plug is connected with the rear wall 102 of the inner cylinder through a tension spring , so as to seal the main drain 11 under normal conditions. The driving mechanism 41 includes a rotary motor 411 and a motor bracket 412 for fixing the rotary motor 411 , and the rotary motor 411 is fixed on the rear wall 202 of the outer cylinder through the motor bracket 412 .

An eccentric wheel 413 is fixedly coupled to the output shaft of the rotary motor 411 and drives it to rotate. The output end of the eccentric wheel 413 is connected to the ejector rod mechanism 42 and drives it to expand and contract back and forth. The rotating motor 411 drives the eccentric wheel 413 to move. When the eccentric wheel 413 is at the far right, the ejector rod 422 extends and inserts into the inner cylinder 1 to open the drain valve 12 to realize drainage. When the eccentric wheel 413 is at the far left, The ejector rod 422 is retracted to stop the drainage.

Preferably, the drum washing machine further includes an inner tub 1 locking and positioning mechanism for controlling the locking of the inner tub 1. When draining water, the inner tub 1 is locked at a set position through the inner tub 1 locking and positioning mechanism, and then controls the position of the inner tub 1. The drain valve opening mechanism 4 opens the drain valve 12 .

When draining water, control the locking and positioning mechanism of the inner cylinder 1 to lock the inner cylinder 1 at the set position, that is, the position corresponding to the drain valve 12 and the ejector rod mechanism 42, and then control the driving mechanism 41 to drive the ejector rod mechanism 42 extends forward and pushes open the drain valve 12 for drainage; after the drainage is completed, the ejector rod mechanism 42 is controlled to retract backward to stop the drainage.

This embodiment provides a drum washing machine. By arranging the drain valve opening mechanism in the lower area of the outer tub, the fluency and completeness of the main drainage are ensured, and the water in the inner tub can be completely drained through the main drainage port in the main drainage stage, which reduces the risk of draining. When the load is too much water, the vibration is large and other problems. At the same time, the drain valve opening mechanism is installed in the lower area of the rear wall of the outer cylinder, which is convenient for maintenance and installation by staff.

The above descriptions are only preferred embodiments of the present invention, and do not 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. Anyone familiar with the technology of this patent 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 drum washing machine, comprising an outer cylinder and an inner cylinder coaxially arranged in the outer cylinder, characterized in that: the inner cylinder is provided with a main drain port, and a drain valve is provided at the main drain port;

It also includes a drain valve opening mechanism, the outer cylinder is provided with a mounting structure for installing the drain valve opening mechanism, and a water sealing structure is arranged between the mounting structure and the drain valve opening mechanism.
The front-loading washing machine according to claim 1, wherein the main water outlet is arranged on the rear wall of the inner tub, and the mounting structure comprises a mounting flange correspondingly arranged on the rear wall of the outer tub;

The drain valve opening mechanism includes a drive mechanism and a push rod mechanism that retracts back and forth under the drive of the drive mechanism, and the water sealing structure is arranged between the mounting flange and the push rod mechanism.
The front-loading washing machine according to claim 2, characterized in that: the mounting flange has a cylindrical flange body, and the ejector mechanism comprises a guide bushing arranged in the flange body, The hollow channel inside the guide bush is a front and rear retractable ejector rod;

The flange body has a first end close to the rear wall of the inner cylinder and a second end far away from the rear wall of the inner cylinder, and the water sealing structure comprises a connection between the front end peripheral wall of the ejector rod and the first end of the flange body the first sealing sleeve;

Preferably, the water sealing structure further comprises a second sealing sleeve connected between the peripheral wall of the front end of the ejector rod and the second end of the flange body;

More preferably, the first sealing sleeve and the second sealing sleeve are integrally provided.
The front-loading washing machine according to claim 3, wherein the guide bushing comprises a hollow guide portion located in the mounting flange, and an edge of the end portion away from the rear wall side of the inner tub extends outward from the hollow guide portion. the formed annular fixing portion;

The annular fixing portion is connected and fixed with the rear wall of the outer cylinder, and the annular fixing portion is limited and fixed between the second end of the flange body and the rear wall of the outer cylinder;

One end of the second sealing sleeve is connected to the peripheral wall of the front end of the ejector rod, and the other end is sealed and connected to the fitting gap between the second end of the flange body and the annular fixing portion.
The front-loading washing machine according to claim 4, characterized in that: the rear wall of the outer cylinder is provided with an installation opening for installing the installation flange, and an annular clamping table is arranged on the outer periphery of the installation opening;

a flanging structure in which the outer periphery of the annular fixing portion of the guide bushing is bent in a direction close to the rear wall of the outer cylinder and then folded inward, and the flanging structure is clamped on the outer wall surface of the annular clamping table;

The mounting flange has a T-shaped clamping portion that is clamped on the annular clamping table, and the flange structure is clamped and limited between the T-shaped clamping portion, the annular clamping table, and the rear wall of the outer cylinder. within the interstitial space formed.
The front-loading washing machine according to claim 5, wherein a first limiting space is formed between the T-shaped clamping portion and the annular clamping table, and a sealing ring is arranged in the first limiting space;

A second limiting space is formed between the T-shaped clamping portion and the annular fixing portion, and one end of the second sealing sleeve is squeezed and limited in the second limiting space.
The drum washing machine according to any one of claims 3-6, wherein an annular boss is fixedly arranged on the peripheral wall of the front end of the ejector rod, the first end of the first sealing sleeve and the second sealing sleeve are The first ends are respectively connected to the annular bosses;

Preferably, the first end of the first sealing sleeve is integrally connected with the first end of the second sealing sleeve, and an annular joint portion that can abut on the annular boss is formed;

An elastic member is arranged outside the guide shaft sleeve, and the elastic member is compressed and abutted between the annular fixing portion and the annular joint portion, so that the first ends of the first sealing sleeve and the second sealing sleeve tightly abut against each other. connected to the annular boss;

More preferably, the annular boss is an annular rubber ring that is fixed in position or tightly wrapped around the outer periphery of the ejector rod.
The front-loading washing machine according to any one of claims 2-7, characterized in that: the main drainage port is opened at a position close to the outer peripheral side on the rear wall of the inner tub;

The outer cylinder includes a peripheral side wall and a rear wall, and the rear wall of the outer cylinder has an installation area for installing the drain valve opening mechanism;

Taking the horizontal plane where the central axis of the outer cylinder is located as a dividing plane, the rear wall of the outer cylinder is divided into an upper area and a lower area, and the installation area of the drain valve opening mechanism is located in the lower area of the rear wall of the outer cylinder.
The front-loading washing machine according to claim 8, wherein the horizontal X-axis and the vertical Y-axis are established with the center of the rear wall of the outer tub as the center of the circle;

Set the angle formed between the drain valve opening mechanism and the negative Y axis clockwise or counterclockwise as β, where: β is between 0-80°;

Preferably, the β range is 0-10°;

More preferably, β=0°, and the drain valve opening mechanism is installed on the rear wall of the outer cylinder at a position corresponding to the bottom of the rear wall of the inner cylinder.
The front-loading washing machine according to any one of claims 2-9, wherein the driving mechanism comprises a rotary motor, an eccentric wheel is fixedly connected to the output shaft of the rotary motor and drives it to rotate, and the output shaft of the eccentric wheel is driven to rotate. The end is connected to the ejector mechanism and drives it to expand and contract back and forth;

Preferably, the drum washing machine further includes an inner tub locking and positioning mechanism for controlling the locking of the inner tub, and the inner tub locking and positioning mechanism is used to lock the inner tub at a set position when draining water, and then the drain valve is controlled to open. The mechanism opens the drain valve.