Drainage device of household appliance and household appliance

Abstract

The invention belongs to the technical field of household appliances, and discloses a drainage device of a household appliance and the household appliance. The drainage device of the household appliance provided by the invention comprises a sleeve with a water inlet at one end and a water outlet at the other end; the pump pushing cylinder is coaxially arranged in the sleeve, and a spiral blade is arranged in the pump pushing cylinder; the sealing piece is arranged in the sleeve and used for closing the water outlet; the sealing piece is connected with the pump pushing cylinder, and the pump pushing cylinder rotates under driving force and drives the sealing piece to move away from the water outlet under the counter-acting force of water, so that the water outlet is opened. When the device is used for a household appliance draining water downwards, the sealing piece moves upwards to open the water outlet for draining water, and after draining is finished, the sealing piece closes the water outlet, and normal water inlet and water storage can be achieved without lifting a water pipe. When the drainage device is used in an upper drainage household appliance, the water outlet in the sleeve is connected with the communicating pipe, the communicating pipe is lifted, and the spiral blade in the drainage device rotates to drive water flow to be drained out of the sleeve and flow through the communicating pipe to be drained.

Description

Technical Field

[0001] The invention belongs to the field of household appliances, and in particular, relates to a drainage device for a household appliance and the household appliance. Background Art

[0002] There are two types of drainage methods for washing machines: upper drainage and lower drainage.

[0003] Upward drainage means lifting the drain pipe, and then using the drain pump to pump the water in the washing machine to a high place before draining it. This drainage method is applicable to a wide range of occasions, and can drain water both upward and downward, and the drainage speed is fast, but it cannot drain all the water, and there is always a certain amount of residue, which is easy to breed bacteria and mold in the drum, and the noise is also relatively loud. Downward drainage means that the drain pipe does not need to be lifted, and is directly inserted into the floor drain. The electromagnetic valve is used to open the water channel and drain the water by gravity. Although this drainage method does not retain water and the noise is also small, it can only drain water downward, and the drainage speed is slow.

[0004] When using a drainage pump to drain water downward, the drainage pump has no water cutoff function. In order to prevent the washing machine from taking in water and draining water at the same time, the drainage pipe must be raised a certain distance before being lowered. Therefore, there is an urgent need for a drainage device that can drain water upward and has a fast drainage speed and low noise when draining downward without raising the drainage pipe.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a household appliance drainage device and household appliance having both the function of a drainage pump and the function of waterway cutoff, so that the household appliance can not only drain water upward, but also drain water downward without raising the drainage pipe.

[0007] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: on the one hand, a drainage device for a household appliance is provided.

[0008] The drainage device comprises:

[0009] A sleeve having a water inlet at one end and a water outlet at the other end;

[0010] A pump push cylinder is coaxially arranged inside the sleeve, and the pump push cylinder has spiral blades inside;

[0011] The sealing member is arranged inside the sleeve to close the water outlet; the sealing member is connected to the pump push cylinder, and the pump push cylinder rotates under the driving force and drives the sealing member to move away from the water outlet under the reaction force of the water, thereby opening the water outlet.

[0012] Further, the pump push cylinder rotates under the action of the magnetic driving force of the stator on the outer peripheral wall of the sleeve through the rotor on its outer peripheral wall;

[0013] The rotor includes a plurality of permanent magnets, and the permanent magnets are evenly arranged along the outer periphery of the pump push cylinder;

[0014] The stator includes a plurality of iron cores wound with coils, and the iron cores are evenly arranged along the outer periphery of the sleeve.

[0015] Further, the sleeve has a reduced-diameter section, and the water outlet is arranged at the position with the smallest inner diameter of the reduced-diameter section;

[0016] The outer peripheral wall of the seal is in contact with the inner peripheral wall of the reduced-diameter section for sealing.

[0017] Further, the pump push cylinder is connected to the seal through a connecting piece;

[0018] The connecting piece has a certain length, one end is inserted into the axis of the spiral blade and fixedly connected to the pump push cylinder, and the other end is connected to the seal.

[0019] Further, a limiting portion is arranged at one end of the connecting piece connected to the seal;

[0020] The seal has a movement cavity and a blocking portion, and the connecting piece is blocked by the blocking portion in the movement cavity to be connected to the seal through the limiting portion.

[0021] Further, the seal has an extension groove opening towards the water inlet, and the inner diameter of the extension groove gradually increases in the direction away from the water inlet;

[0022] The limiting portion can be blocked by the minimum inner diameter section on the extension groove and move in the movement cavity formed by the extension groove.

[0023] Further, the limiting portion includes a conical cap and a spherical seat, and the extension groove is arranged on the conical cap;

[0024] The middle area of the spherical seat has a groove structure with an upward opening, and internal threads are arranged on the inner peripheral wall of the groove structure;

[0025] The middle area of the conical cap at the maximum inner diameter of the extension groove has an extension portion, and external threads matching the internal threads of the groove structure are arranged on the outer periphery of the extension portion.

[0026] Further, a through hole penetrates through the extension portion, and the through hole is communicated with the extension groove and has the same inner diameter as the maximum inner diameter of the extension groove.

[0027] Further, an opening is provided at the end of the sleeve, and the water inlet joint is inserted into the sleeve through the opening;

[0028] The water inlet joint is inserted into the pump push cylinder.

[0029] On the other hand, a household appliance is also provided, and the household appliance includes the drainage device of the above-mentioned household appliance.

[0030] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0031] 1. The drainage device of the household appliance provided by the present invention not only has the function of an ordinary drainage pump to enable the household appliance to perform upward drainage, but also has the function of blocking the water path so that the household appliance does not need to raise the drainage pipe when performing downward drainage.

[0032] 2. In the drainage device provided by the present invention, after water flow enters the drainage device, the pump push cylinder rotates to open the water outlet to allow the water flow to flow out. And the lint that enters the drainage device along with the water flow can be discharged from the drainage device along the spiral blades inside the drainage device, and will not wind around the spiral blades to affect drainage. This solution does not require a lint filter to be provided, nor does it require the user to manually clean the lint in the lint filter.

[0033] 3. In the drainage device provided by the present invention, since one end of the connecting piece is inserted into the axis of the spiral blade, the pump push cylinder will not be eccentric when rotating.

[0034] 4. In the drainage device provided by the present invention, since the water inlet joint is inserted into the pump push cylinder, the pump push cylinder can be restricted from tilting even when it is not moving.

[0035] 5. The drainage device provided by the present invention not only has the function of a drainage pump, but also has the function of a cut-off valve. When in use, the function of the drainage pump is started while the cut-off valve also works, with seamless linkage and a clever structure.

[0036] The following further describes in detail the specific embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings, as a part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention, but do not constitute an improper limitation to the present invention. Obviously, the accompanying drawings in the following description are only some embodiments, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts. In the drawings:

[0038] Figure 1 is a schematic diagram of the drainage device of the present invention when the water outlet is blocked in the initial state;

[0039] Figure 2 is a schematic diagram of the drainage device of the present invention driving the connecting piece to move upward;

[0040] Figure 3It is a schematic diagram of the drainage device of the present invention driving the seal to move upward to open the water outlet;

[0041] Figure 4 It is an enlarged schematic diagram of the seal of the present invention.

[0042] In the figure: 100, sleeve; 200, pump push cylinder; 300, seal;

[0043] 101, water inlet; 102, water inlet joint; 103, water outlet; 104, water outlet joint; 105, reduced diameter section; 106, sealing ring; 107, stator;

[0044] 1071, coil; 1072, iron core; 1073, magnetic isolation cover;

[0045] 201, spiral blade; 202, rotor;

[0046] 2021, permanent magnet; 2022, fixed groove;

[0047] 301, connecting piece; 302, limiting part; 303, spherical seat; 304, conical cap; 305, extension groove; 306, extension part; 307, groove structure; 308, through hole.

[0048] It should be noted that these drawings and text descriptions are not intended to limit the scope of the concept 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 Embodiments

[0049] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0050] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0051] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection 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 according to specific circumstances.

[0052] As Figures 1 to 4 shown, the present invention provides a drainage device for household appliances and a household appliance.

[0053] The drainage device of the household appliance includes:

[0054] A sleeve 100 having a water inlet 101 at one end and a water outlet 103 at the other end;

[0055] A pump push cylinder 200 coaxially arranged inside the sleeve 100, and the inside of the pump push cylinder 200 has a spiral blade 201;

[0056] A seal 300 arranged inside the sleeve 100 to close the water outlet 103; it is connected to the pump push cylinder 200, and the pump push cylinder 200 rotates under a driving force and drives the seal 300 to move away from the water outlet 103 under the reaction force of water to open the water outlet 103.

[0057] The drainage device of the household appliance provided by the present invention not only has the function of a common drainage pump to enable the household appliance to drain water upward, but also has the function of blocking the water path so that the household appliance does not need to raise the drain pipe when draining water downward.

[0058] On the other hand, a household appliance is also provided, and the household appliance includes the above-mentioned drainage device of the household appliance.

[0059] Embodiment 1

[0060] As Figure 1 shown, this embodiment provides a drainage device for a household appliance.

[0061] The drainage device of the household appliance includes:

[0062] A sleeve 100 having a water inlet 101 at one end and a water outlet 103 at the other end;

[0063] A pump push cylinder 200 coaxially arranged inside the sleeve 100, and the inside of the pump push cylinder 200 has a spiral blade 201;

[0064] The seal 300 is arranged inside the sleeve 100 to close the water outlet 103; it is connected to the pump push cylinder 200, and the pump push cylinder 200 rotates under the driving force and drives the seal 300 to move away from the water outlet 103 under the reaction force of water, thereby opening the water outlet 103.

[0065] The household appliance in this embodiment can be a clothing processing device such as a washing machine or a washer-dryer, or it can be a living device that requires drainage, such as a dishwasher, a water purifier, and a water softener.

[0066] Next, the installation of the drainage device on a washing machine is taken as an example for explanation.

[0067] The drainage pump in this embodiment includes a sleeve 100 , a pump push cylinder 200 , a sealing member 300 , and a driving device for driving the pump push cylinder 300 to rotate.

[0068] The sleeve 100 is a cylindrical cavity surrounded by the shell and has a certain length. One end of the sleeve 100 has a water inlet 101 connected to the drain pipe of the washing machine, and the other end has a drain port.

[0069] The pump push cylinder 200 is also a cylindrical structure with a certain length. The inner wall of the pump push cylinder 200 is provided with a spiral blade 201 for stirring the water flow. The spiral blade 201 is spirally arranged along the circumferential direction of the inner wall of the pump push cylinder 200. The pump push cylinder 200 is rotatably coaxially arranged inside the sleeve 100.

[0070] The sealing member 300 is also disposed in the sleeve 100 and connected to the pump push cylinder 200. When there is no water in the sleeve 100, the sealing member 300 is in an initial state to close the water outlet 103; when water flows into the sleeve 100 from the water inlet 101, the pump push cylinder 200 rotates under the driving force of the driving device and drives the sealing member 300 to move away from the water outlet 103 under the reaction force of the water, opening the water outlet 103, and the spiral blade 201 drives the water to be discharged from the water outlet 103.

[0071] In this solution, it not only has the function of a common drainage pump to enable the washing machine to drain upward, but also has the function of blocking the water channel so that the washing machine does not need to raise the drain pipe when draining downward. It can choose to drain upward or downward according to the needs of the user, and it can also take into account the drainage speed and noise, which improves the user experience.

[0072] The solution of this embodiment also includes: the pump push cylinder 200 is rotated by the rotor 202 on its outer peripheral wall under the action of the magnetic driving force of the stator 107 on the outer peripheral wall of the sleeve 100;

[0073] The rotor 202 includes a plurality of permanent magnets 2021, and the permanent magnets 2021 are evenly distributed along the outer circumference of the pump push cylinder 200;

[0074] The stator 107 includes a plurality of iron cores 1072 wound with coils 1071, and the iron cores 1072 are uniformly arranged along the outer circumference of the sleeve 100.

[0075] In the solution of this embodiment, there is a spacing between the outer circumference of the pump push cylinder 200 and the outer wall of the sleeve 100, and the two do not contact during operation. A rotor 202 is provided on the outer wall of the pump push cylinder 200, and a stator 107 is provided on the outer wall of the sleeve 100. After the stator 107 is energized, a magnetic driving force is generated to drive the rotor 202 to drive the pump push cylinder 200 to rotate.

[0076] Specifically, the rotor 202 includes a plurality of permanent magnets 2021, and the permanent magnets 2021 are uniformly arranged along the outer circumference of the pump push cylinder 200. The stator 107 includes a plurality of iron cores 1072 wound with coils 1071, and the iron cores 1072 are uniformly arranged along the outer circumference of the sleeve 100.

[0077] Among them, the numbers of the iron cores 1072 and the permanent magnets 2021 are different. The magnetic poles of the permanent magnets 2021 adjacent to each other in the circumferential direction of the pump push cylinder 200 are opposite. When energized, the iron cores 1072 adjacent to each other in the circumferential direction of the sleeve 100 generate magnetic fields with opposite magnetic poles. For example, during use, the magnetic field generated by the coil 1071 attracts the permanent magnet 2021 on the right side to approach and repels the permanent magnet 2021 on its left side to move away. Then, when the current direction is changed, the magnetic field generated by the coil 1071 still attracts the permanent magnet 2021 on the right side to approach and repels the permanent magnet 2021 on its left side to move away. Thus, the pump push cylinder is driven to rotate.

[0078] In order to provide a driving force for the pump push cylinder 200 to rotate, the drainage device further includes a power supply module and a driving module. The power supply module converts alternating current into direct current with the same voltage and different current directions in multiple paths. The driving module is responsible for supplying power to different coils 1071 at appropriate times with the above-mentioned direct current.

[0079] Furthermore, in order to determine the power supply timing, a plurality of Hall elements are also provided at positions on the outer wall of the sleeve 100 corresponding to the height range of the permanent magnets 2021, for determining the corresponding positions of the movement of the permanent magnets 2021.

[0080] In this solution, the iron core 1072 is formed by laminating multiple layers of silicon steel sheets. When the coil 1071 is energized, in order to prevent the generated magnetic field from leaking out, affecting the operation of other components and reducing the working efficiency of the drainage device, a magnetic isolation cover 1073 is provided outside the stator 107. Among them, the magnetic isolation cover 1073 is a circular ring-shaped shell and can be made of zinc alloy or plastic material containing zinc alloy powder.

[0081] In this solution, a fixing groove 2022 is provided on the outer peripheral wall of the pump pushing cylinder 200, and a plurality of permanent magnets 2021 are fixed to the pump pushing cylinder 200 by being installed in the fixing groove 2022. Among them, the fixing groove 2022 can be either a separate structure or an integral structure processed simultaneously with the pump pushing cylinder 200.

[0082] In addition, in order to prevent the hot water discharged during special programs of the washing machine, such as drum cleaning, disinfection, boiling washing, etc., from causing the permanent magnets 2021 to fail, a heat insulation layer is seamlessly wrapped around the outer periphery of each permanent magnet 2021.

[0083] It should be noted that the permanent magnets 2021 in the drawings are only schematic and do not represent the actual magnetic pole directions. Obviously, the magnetic pole directions of the permanent magnets 2021 and the magnetic pole directions of the stator 107 iron cores 1072 are in the same plane during normal operation.

[0084] When water needs to be drained when flowing into the drainage device, the stator 107 is energized, and the magnetic driving force generated by the stator 107 causes the rotor 202 to drive the pump pushing cylinder 200 to rotate. When the pump pushing cylinder 200 pushes water to flow downward, it is pushed upward by the reaction force of the water, and the seal 300 connected to it is lifted, opening the water outlet 103 and driving the water flow to drain out of the washing machine.

[0085] When drainage is not required, the stator 107 is powered off, and the pump pushing cylinder 200 and the rotor 202 are pressed downward under the transmission of the connecting member 301, transferring the pressure to the seal 300, so that the seal 300 has better sealing performance and ensures no water leakage.

[0086] The solution of this embodiment further includes: the sleeve 100 has a reduced-diameter section 105, and the water outlet 103 is arranged at the position with the smallest inner diameter of the reduced-diameter section 105;

[0087] The outer peripheral wall of the seal 300 abuts against the inner peripheral wall of the reduced-diameter section 105 for sealing.

[0088] The pump pushing cylinder 200 is connected to the seal 300 through a connecting member 301;

[0089] The connecting member 301 has a certain length, one end is inserted into the axis of the spiral blade 201 and fixedly connected to the pump pushing cylinder 200, and the other end is connected to the seal 300.

[0090] In this solution, the sleeve 100 has a reduced-diameter section 105, and the reduced-diameter section 105 is provided at one end opposite to the water inlet 101. The inner diameter of the reduced-diameter section 105 gradually decreases along the direction away from the water inlet 101, and the water outlet 103 is provided at the extended end of the reduced-diameter section 105. The pump push cylinder 200 is connected to the seal 300 through a connecting member 301. The connecting member 301 has a certain length, one end is inserted into the axis of the spiral blade 201 and fixedly connected to the pump push cylinder 200, and the other end is connected to the seal 300.

[0091] In this solution, when there is no water in the drainage device and the pump push cylinder 200 is in the initial stage, as Figure 1 shown, the outer peripheral wall of the seal 300 abuts against the inner peripheral wall of the reduced-diameter section 105 to keep the water outlet 103 in a closed state. And there is a certain distance between the uppermost end of the pump push cylinder 200 and the upper end of the sleeve 100, so that the pump push cylinder 200 can move upward to open the water outlet 103 after water enters the drainage device.

[0092] In the above solution, the spiral blade 201 is a shaftless and continuous spiral blade 201. That is to say, the spiral blade 201 in this embodiment is not the multiple blades used in traditional water pumps, but is formed by a single blade spirally extending along the inner side wall of the pump push cylinder 200. The spiral blade 201 has no central axis, and the spiral angle is at least more than 360°, that is, when viewed from one side, there are no gaps around, and only the small hole in the middle can be seen. Since one end of the connecting member 301 is arranged in the small hole in the middle of the spiral blade 201, the water flow here is the smallest and there is no eccentricity when rotating.

[0093] Of course, the connecting member 301 can either be separately manufactured and then fixed to the pump push cylinder 200, or be injection-molded or cast together with the entire pump push cylinder 200.

[0094] In addition, when there is no water in the drainage device and the pump push cylinder 200 is in the initial stage, the permanent magnet 2021 is not aligned with the iron core 1072.

[0095] In the preferred solution of this embodiment, the stator 107 is arranged close to the water inlet 101.

[0096] In this solution, the pump push cylinder 200 is a cylindrical structure surrounded by a housing, and the material of the housing is preferably a non-metallic material. On the one hand, it can reduce the weight of the pump push cylinder 200 and reduce the driving resistance. On the other hand, it can also prevent eddy currents from being generated in the pump push cylinder 200 when the magnetic field of the stator 107 changes, consuming the magnetic field strength used to drive the rotor 202.

[0097] In order to further reduce the overall weight of the pump push cylinder 200, the thicknesses of the spiral vanes 201 at different positions are set to be different. Since the spiral vane 201 bears the greatest force at the connection with the inner wall of the pump push cylinder 200, the thickness of the spiral vane 201 at this position is increased. While the center of the spiral vane 201 bears the least force, the thickness of the spiral vane 201 at this position becomes smaller.

[0098] During production, it is preferred that the pump push cylinder 200 and the spiral vane 201 are integrally injection-molded and demolded by spiral. In this way, compared with assembly molding, the production process can be reduced, the working hours can be reduced, the efficiency can be improved, the strength is also higher, and the noise and resistance can be reduced.

[0099] When the drainage device of this solution is in use, the water in the washing machine drain pipe enters the drainage device through the water inlet 101 in the sleeve 100. The pump push cylinder 200 rotates relative to the sleeve 100 to drive the water flow towards the water outlet 103. Since the blades on the inner peripheral wall of the pump push cylinder 200 are spiral vanes 201, foreign matters such as lint that enter the drainage pump along with the water flow can continue to be discharged from the drainage pump along with the water flow through the spiral vanes 201 and will not wind around the spiral vanes 201 to affect drainage. This solution does not require a lint filtering device, which not only saves costs but also avoids the user from regularly cleaning the lint filtering device.

[0100] The solution of this embodiment further includes: a limiting portion 302 is provided at one end of the connecting member 301 connected to the sealing member 300;

[0101] The sealing member 300 has a movement cavity and a blocking portion, and the connecting member 301 is blocked by the blocking portion in the movement cavity to be connected to the sealing member 300 through the limiting portion 302.

[0102] Specifically, the sealing member 300 has an extension groove 305 that opens towards the water inlet 101, and the inner diameter of the extension groove 305 gradually increases in the direction away from the water inlet 101;

[0103] The limiting portion 302 can be blocked by the minimum inner diameter section on the extension groove 305 to move in the movement cavity formed by the extension groove 305.

[0104] More specifically, the limiting portion 302 includes a conical cap 304 and a spherical seat 303, and the extension groove 305 is provided on the conical cap 304;

[0105] The middle area of the spherical seat 303 has a groove structure 307 with an upward opening, and an internal thread is provided on the inner peripheral wall of the groove structure 307;

[0106] The middle area of the conical cap 304 at the maximum inner diameter of the extension groove 305 has an extension portion 306, and an external thread that mates with the internal thread of the groove structure 307 is provided on the outer periphery of the extension portion 306.

[0107] Furthermore, there is a through hole 308 penetrating the extension part 306. The through hole 308 communicates with the extension groove 305 and has the same inner diameter as the maximum inner diameter of the extension groove 305.

[0108] In the solution provided in this embodiment, a limiting part 302 is provided at the end of the end of the connecting part 301 connected to the seal 300. The maximum diameter of the limiting part 302 is greater than the diameter of the connecting part 301.

[0109] The seal 300 has a movement cavity for accommodating the limiting part 302 and a blocking part for blocking the limiting part 302 from protruding out of the movement cavity. The connecting part 301 is blocked by the blocking part in the movement cavity to be connected to the seal 300.

[0110] In a further solution, the movement cavity has a certain extension length in the movement direction of the pump push cylinder 200 for the connecting part 301 to drive the limiting part 302 to move in the movement cavity along the movement direction of the pump push cylinder 200.

[0111] As Figure 4 shown, in a specific solution, the seal 300 has an extension groove 305 opening towards the water inlet 101. The inner diameter of the extension groove 305 gradually increases in the direction away from the water inlet 101. The diameter of the connecting part 301 is smaller than the minimum diameter of the extension groove 305, so that the connecting part 301 can be inserted into the extension groove 305 to drive the limiting part 302 to move.

[0112] The limiting part 302 is a spherical structure with a diameter greater than the minimum diameter of the extension groove 305 and smaller than the maximum diameter of the extension groove 305. Thus, the limiting part 302 can be blocked by the minimum inner diameter section on the extension groove 305 to move in the movement cavity formed by the extension groove 305.

[0113] When the connecting part 301 and the pump push cylinder 200 are of an integrally formed structure, the limiting ball and the connecting part 301 are not of an integrally formed structure, and they are detachably connected. When the connecting part 301 and the pump push cylinder 200 are not of an integrally formed structure, the limiting ball and the connecting part 301 can be of an integrally formed structure.

[0114] More specifically, the limiting part includes a conical cap 304 and a spherical seat 303, and the extension groove 305 is provided on the conical cap 304.

[0115] Wherein, the arc-shaped outer peripheral wall of the spherical seat 303 abuts against the inner peripheral wall of the variable diameter section 105 to close the water outlet 103. In order to further increase the sealing effect between the two, an annular sealing ring 106 is provided on the inner peripheral wall of the variable diameter section 105. Among them, the sealing ring 106 is made of elastic rubber or silica gel material.

[0116] In this solution, for the convenience of disassembly, assembly and fixation, the conical cap 304 and the spherical seat 303 are connected by threads. The middle area of the spherical seat 303 has a groove structure 307 with an upward opening. An internal thread is provided on the inner peripheral wall of the groove structure 307. In the middle area of the conical cap 304 at the maximum inner diameter of the extension groove 305, there is an extension 306, and an external thread matching the internal thread of the groove structure 307 is provided on the outer periphery of the extension 306. During installation, first place the limiting part 302 into the extension groove 305, and the other end of the connecting piece 301 extends out of the extension groove 305 and is connected to the limiting part 302. Then insert the extension 306 on the conical cap 304 into the groove structure 307 of the spherical seat 303, and then achieve fixation through thread matching.

[0117] In the above solution, the movement cavity refers to the extension groove 305, and the blocking part refers to the inner peripheral wall at a certain position on the extension groove 305 where the diameter is smaller than the diameter of the limiting part 302.

[0118] In a further solution of this embodiment, the extension 306 has a through hole 308, the inner diameter of each position of the through hole 308 is the same, and the upper end of the through hole 308 communicates with the extension groove 305. At the same time, the inner diameter of the through hole 308 is the same as the maximum inner diameter of the extension groove 305.

[0119] In the solution of this embodiment, since the seal 300 will come into contact with water, in order to prevent the seal 300 from rusting and affecting the sealing, the conical cap 304 and the spherical seat 303 of the seal 300 are preferably made of galvanized steel or stainless steel. Also, since the outer surface of the conical cap 304 of the seal 300 is conical, the water flow resistance can be reduced, and the downward water flow can be dispersed to the surrounding.

[0120] Of course, in other solutions of this embodiment, the limiting part 302 can also be of other shapes, as long as it can be limited to move up and down in the movement cavity.

[0121] In another specific solution of this embodiment, the limiting member includes a conical cap 304 and a spherical seat 303, and the extension groove 305 is provided on the conical cap 304. The inner diameter of each position inside the extension groove 305 is the same, and is larger than the diameter of the connecting piece 301 and smaller than the diameter of the sealing ball. A cavity communicating with it is opened below the extension groove 305, and this cavity is the movement cavity. During installation, the limiting part 302 is arranged in the movement cavity, and the connecting piece 301 passes through the extension groove 305 and is fixedly connected to the pump push cylinder 200. In this solution, the blocking part is the upper wall of the movement cavity.

[0122] The solution of this embodiment further includes: an opening is provided at the end of the sleeve 100, and the water inlet joint 102 is inserted into the sleeve 100 through the opening;

[0123] The water inlet joint 102 is inserted into the pump push cylinder 200.

[0124] In this solution, an opening is provided on the housing at the end of the sleeve 100 away from the reduced-diameter section 105. The water inlet joint 102 of the washing machine first passes through this opening and is inserted into the sleeve 100, and then inserted into the pump push cylinder 200. In this solution, since the water inlet joint 102 is inserted into the pump push cylinder 200, the pump push cylinder 200 can be restricted from tilting when it is not moving.

[0125] As Figure 1 shown, in the drainage device of this solution, when draining water, the power module energizes the stator 107, and the rotor 202 drives the pump push cylinder 200 and the connecting member 301 to rotate under the magnetic driving force generated by the stator 107. At first, since the permanent magnet 2021 is not aligned with the iron core 1072, the rotation speed is not high. At this time, the bottom of the limit ball is in point contact with the bottom wall of the groove structure 307 of the spherical seat 303, and the resistance is very small.

[0126] As Figure 2 shown, when the speed is gradually increased, under the reaction force of water, the rotor 202 drives the pump push cylinder 200 and the connecting member 301 to rise together. At this time, the limit ball on the connecting member moves upward along the extension groove 305. During this process, the seal remains stationary and is still in the state of closing the water outlet.

[0127] As Figure 3 shown, when rising to a certain height, the connecting member 301 is blocked by the blocking portion, and the pump push cylinder 200 also drives the seal 300 to rotate and move upward. Thereby, the seal 300 opens the water path, allowing water to flow out of the sleeve 100 through the water outlet 103.

[0128] When the drainage is completed, the power module is powered off, and the pump push cylinder 200, the connecting member 301, and the seal 300 descend under the action of gravity. The outer periphery of the seal 300 abuts against the inner peripheral wall of the reduced-diameter section 105 to close the water outlet 103.

[0129] In the solution of the embodiment, the drainage power can also be reasonably designed so that the upward reaction force generated by draining water at the rated drainage power is equal to the total gravity of the rotor 202, the pump push cylinder 200, the connecting member 301, and the seal 300. Thereby, the water path can be opened and the above-mentioned whole will not touch the upper end of the sleeve 100.

[0130] In addition, in this solution, when the drainage device is operating normally, the whole composed of the rotor 202, the pump push cylinder 200, the connecting member 301, and the seal 300 will be stably located at the center of the sleeve 100 and will not touch the inner peripheral wall of the sleeve 100. Here, bearings can also be saved, reducing the overall cost of household appliances.

[0131] When the above drainage device is used in a washing machine with bottom drainage, the water outlet 103 of the sleeve 100 is directly connected to the floor drain through a hose for drainage. When drainage is required, the seal 300 moves upward to open the water outlet 103 for drainage. After drainage is completed, the seal 300 closes the drain opening, and normal water inlet can be achieved without raising the water pipe. Compared with a washing machine using a solenoid valve, the drainage is faster.

[0132] When the above drainage device is used in a washing machine with top drainage, the water outlet 103 in the sleeve 100 is connected to the water outlet joint 104, and the communicating pipe connected to the water outlet joint 104 is lifted upward. The spiral blade 201 in the drainage device rotates to drive the water flow to discharge from the sleeve 100 and flow through the communicating pipe for drainage. Compared with a washing machine using an ordinary drainage pump, the noise is lower and there is no need to clean lint.

[0133] Therefore, the drainage device provided in this embodiment can be used in both top-drainage household appliances and bottom-drainage household appliances.

[0134] Embodiment 2

[0135] This embodiment provides a household appliance.

[0136] Since the household appliance in this embodiment uses the drainage device described in the above embodiment. On the one hand, it can be used in both top-drainage household appliances and bottom-drainage household appliances, thus improving the scope of use. On the other hand, foreign matters such as lint in the washing water can directly flow out through the drainage pump and will not be wound around the spiral blade 201 to affect drainage. This solution does not require a lint filtering device, which not only saves costs but also avoids the user from regularly cleaning the lint filtering device.

[0137] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, can make some changes or modifications to the above-mentioned technical content as equivalent embodiments with equivalent changes, but as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the present invention.

Claims

1. A drainage device for a household appliance, characterized in that, Comprising: A sleeve with a water inlet at one end and a water outlet at the other end; A pump push cylinder coaxially arranged inside the sleeve, and the inside of the pump push cylinder has a spiral blade; A seal arranged inside the sleeve to close the water outlet; it is connected to the pump push cylinder, and the pump push cylinder rotates under the driving force and drives the seal to move away from the water outlet direction under the reaction force of water to open the water outlet.

2. The drainage device of the household appliance according to claim 1, characterized in that, The pump push cylinder rotates under the action of the magnetic driving force of the stator on the outer peripheral wall of the sleeve on the outer peripheral wall of the pump push cylinder; The rotor includes a plurality of permanent magnets, and the permanent magnets are evenly arranged along the outer periphery of the pump push cylinder; The stator includes a plurality of iron cores wound with coils, and the iron cores are evenly arranged along the outer periphery of the sleeve.

3. The drainage device of the household appliance according to claim 1, characterized in that, The sleeve has a reduced diameter section, and the water outlet is arranged at the position with the smallest inner diameter of the reduced diameter section; The outer peripheral wall of the seal abuts against the inner peripheral wall of the reduced diameter section for sealing.

4. The drainage device of the household appliance according to any one of claims 1 or 2, characterized in that The pump push cylinder is connected to the seal through a connecting piece; The connecting piece has a certain length, one end is inserted into the axis of the spiral blade and fixedly connected to the pump push cylinder, and the other end is connected to the seal.

5. The drainage device of the household appliance according to claim 4, characterized in that, A limiting part is arranged at one end of the connecting piece connected to the seal; The seal has a movement cavity and a blocking part, and the connecting piece is blocked by the blocking part in the movement cavity to be connected to the seal.

6. The drainage device of the household appliance according to claim 5, characterized in that, The seal has an extension groove opening towards the water inlet direction, and the inner diameter of the extension groove gradually becomes larger in the direction away from the water inlet; The limiting part can be blocked by the smallest inner diameter section of the extension groove in the movement cavity formed by the extension groove to move.

7. The drainage device of the household appliance according to claim 6, characterized in that, The limiting part includes a conical cap and a spherical seat, and the extension groove is arranged on the conical cap; The middle area of the spherical seat has a groove structure with an opening upwards, and internal threads are arranged on the inner peripheral wall of the groove structure; The middle area of the conical cap at the maximum inner diameter of the extension groove has an extension part, and external threads matching the internal threads of the groove structure are arranged on the outer periphery of the extension part.

8. The drainage device of the household appliance according to claim 7, characterized in that, A through hole runs through the extension part, and the through hole communicates with the extension groove and has the same inner diameter as the maximum inner diameter of the extension groove.

9. The drainage device of the household appliance according to claim 2, characterized in that, An opening is provided at the end of the sleeve, and the water inlet joint is inserted into the sleeve through the opening; The water inlet joint is inserted into the pump push cylinder.

10. A household appliance, characterized in that, The household appliance includes the drainage device of the household appliance according to any one of claims 1-9 above.

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