WO2019007395A1

WO2019007395A1 - Draining pump and washing machine using same

Info

Publication number: WO2019007395A1
Application number: PCT/CN2018/094653
Authority: WO
Inventors: 赵志强; 吕佩师
Original assignee: 青岛海尔洗衣机有限公司
Priority date: 2017-07-07
Filing date: 2018-07-05
Publication date: 2019-01-10
Also published as: CN109208271A; CN109208271B

Abstract

Disclosed is a draining pump, comprising a water outlet. The water outlet is provided with a check valve; the check valve comprises a valve body; the valve body comprises a valve chamber and a sealing station provided at the upstream of the valve chamber; a movable valve plug is provided within the valve chamber; the valve plug is able to move under the action of drainage water pressure to open a draining passage of the sealing station. The draining pump can effectively prevent residual water in a draining pipeline from returning to the draining pump, or even to an outer washing drum to cause any pollution; odors and mould in a sewer are prevented from entering the washing machine; noises of the draining pump are effectively reduced; the user experience is improved and convenience is brought to users.

Description

Drainage pump and washing machine using same

Technical field

The invention relates to the field of washing machines, in particular to a drainage pump and a washing machine using the same.

Background technique

At present, foreign washing machines generally use the upper drainage method to discharge waste water. Most of the domestic washing machines also use the upper drainage method. The upper drainage is that the washing machine drains the wastewater and then discharges it through the drainage pump. However, the existing drainage pump of the above drainage has the following problems: (1) In the final stage of the existing drainage pump, once the drainage pump is stopped, the water in the drainage pipe will flow back into the drainage pump chamber, and even return to the washing outer cylinder. Residual water will cause mold to multiply and scale will be generated; (2) The existing washing machine drain pump connection drain hose is generally connected to the bathroom floor drain, and the odor in the sewer will enter the drain pump along the drain hose and enter the washing outer cylinder. The washing machine is opened to a bad smell; (3) In the final stage of the existing drainage pump, the drainage pump chamber is mixed with air, which will generate great noise and seriously affect the consumer experience.

Chinese Patent Application No. 201610307125.8 discloses a drain pump assembly and a washing machine therewith, the present invention discloses a drain pump assembly and a washing machine therewith, the drain pump assembly comprising: a drain pump, the drain pump being provided with a receiving chamber for accommodating the impeller The drain pump has a water inlet pipe and a water outlet pipe communicating with the accommodating cavity; the drain pipe, the drain pipe is connected with the water outlet pipe; the check valve piece, the check valve piece is movable between the first position and the second position It is disposed on one of the drain pipe and the water outlet pipe to open and close the water outlet pipe, and the check valve piece is formed as a one-way valve piece that is single-passed from the accommodating cavity to the water outlet pipe, and the check valve piece is located at the In one position, the outlet pipe is turned on, and when the check valve piece is in the second position, the outlet pipe is disconnected. According to the drain pump assembly of the embodiment of the present invention, although the noise of the drain pump assembly can be appropriately reduced, the check function of the check valve sheet is insensitive, and it is difficult to be located in the second position in time after the drain is completed, and at the same time, it is difficult to avoid the sewer in the sewer. The odor enters the drain pump along the drain hose. In addition, it is more difficult to place the check valve piece in the second position after stacking debris or batt so as not to break the water outlet pipe, causing the waste water to flow backward.

The present invention has been made in view of the above.

Summary of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and to provide a drain pump and a washing machine using the same, which prevent backflow of waste water and/or odor and reduce noise.

In order to solve the above technical problem, the basic idea of the technical solution of the present invention is: a drain pump including a water outlet, the water outlet is provided with a check valve, the check valve includes a valve body, and the valve body includes a a valve chamber and a sealing station disposed upstream of the valve chamber, wherein the valve chamber is movably provided with a valve plug, and the valve plug moves under the pressure of the drainage water to open the drainage passage of the sealing station.

Further, a valve cover is disposed downstream of the valve cavity, and the sealing table and the valve cover form a valve cavity together with the valve body, and the valve cover is provided with at least one valve cover drainage hole.

Further, a downstream end of the valve chamber is provided with a stop, the sealing table and the stop form a valve cavity together with the valve body, and the stop communicates with the drain line. Preferably, the stop is a retracted tube. road.

Further, the sealing table is provided with a drainage hole, and the valve plug moves away from or seals the drainage hole under the pressure of the two ends of the sealing table, and the one-way valve opens the drainage pump one-way drainage or the one-way valve closes the drainage pump Undrained.

Further, the valve plug is at least partially larger than a minimum size of the drain hole on the sealing table. Preferably, the size of the drain hole on the sealing table gradually increases toward the downstream of the valve cavity, and the valve plug corresponds to the drain hole. The size of the part also becomes larger accordingly.

Further, the bonnet/block is further provided with a limiting structure for preventing the valve plug from blocking the bonnet/block. Preferably, the limiting structure is a protrusion extending toward the sealing table.

Further, the valve plug is provided with a limiting structure for preventing the valve plug from blocking the bonnet/block. Preferably, the limiting structure is a protrusion extending toward the bonnet/block.

Further, the check valve further includes an elastic member that abuts between the valve plug/block and the valve cover, and the valve plug seals the drain hole on the sealing table under the elastic force of the elastic member The one-way valve is closed, preferably the spring element is a spring.

Further, the valve plug seals the drain hole on the sealing table under the action of its own gravity to close the one-way valve. Preferably, the valve plug is configured as a ball valve plug, and the limiting structure is disposed on the valve cover/block on.

The invention also provides a washing machine, which comprises the above-mentioned drain pump, the drain pump further comprises a motor-driven pump wheel, when the drain pump drains, the drain pump starts, and the pump wheel is under the action of the motor Starting to rotate, the valve plug overcomes the elastic force of the elastic element under the pressure of the drainage water and/or overcomes the gravity movement of the valve plug itself, leaving the drainage hole on the sealing table, the one-way valve is opened, the drainage pump drains; the drainage pump When the water is not drained, the pump wheel stops rotating, the drainage water pressure received by the valve plug disappears, and the return movement is performed under the action of the elastic force of the elastic member or the self-gravity, and the drainage hole on the sealing table is sealed, and the one-way valve is closed. The drain pump is not drained.

Further, the drainage pump has a drainage height of 10 cm or more.

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

1. Effectively avoid the residual water in the drain pipe from flowing back to the drain pump or even washing the outer cylinder to cause pollution.

2, effectively avoid the sewer odor mold into the washing machine.

3. Effectively reduce the noise of the drainage pump.

4. Improve user experience and provide convenience for users.

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

DRAWINGS

The drawings are intended to provide a further understanding of the invention, and are intended to be illustrative of the invention. It is apparent that the drawings in the following description are only some embodiments, and other drawings may be obtained from those skilled in the art without departing from the drawings. In the drawing:

Figure 1 is a cross-sectional view of a drain pump of the present invention;

Figure 2 is a schematic view showing the drainage stage of the drain pump of the present invention;

Figure 3 is a cross-sectional view showing the fourth embodiment of the drain pump of the present invention.

In the figure: 1, drain pump; 11, water outlet; 12, water inlet; 13, pump wheel; 14, motor; 2, check valve; 21, valve cover; 211, drain hole on the valve cover; Plug; 23, sealing table; 231, drainage hole on the sealing table; 24, limit structure; 25, elastic components.

It is to be understood that the drawings and the written description are not intended to limit the scope of the present invention in any way.

Detailed ways

The embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is not intended to limit the scope of the invention.

In the description of the present invention, it is to be noted that the orientation or positional relationship of the terms "upper", "lower", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, only for the purpose of The invention is not limited by the scope of the invention, and is not intended to be a limitation of the invention.

In the description of the present invention, it should be noted that the terms "mounting" and "connecting" are to be understood broadly, and may be, for example, a fixed connection, a detachable connection, or an integral, unless otherwise explicitly stated and defined. Ground connection; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood in a specific case by those skilled in the art.

The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings.

As shown in FIG. 1 to FIG. 3, a drain pump 11 includes a water outlet 11, and the water outlet 11 is provided with a check valve 2, the check valve 2 includes a valve body, and the valve body includes a valve chamber And a sealing table 23 disposed upstream of the valve chamber, wherein the valve chamber is movably provided with a valve plug 22, and the valve plug 22 moves under the pressure of the drainage water to open the drainage passage of the sealing table.

In the above solution, the drain pump 11 of the present invention is generally used for a washing machine using an upper drain type. In order to solve these problems, the present invention solves these problems by providing a drain pump 11 including a water outlet 11 which is included in the washing machine of the upper drain type. A check valve 2 is provided, the check valve 2 is detachably disposed at the water outlet 11, the check valve 2 is fixedly disposed at the water outlet 11, and the drain pipe is detachably connected to the water outlet At 11, the drain line communicates with the water outlet 11; the drain line is detachably connected to the check valve 2, and the drain line communicates with the water outlet 11. The drain pump 11 includes a water outlet 11 that communicates with the drain line and a water inlet 12 that connects the water inlet line, the drain line being connected to a sewer line, the water inlet line being connected to the washing outer tube of the washing machine. A check valve 2 is provided at the water outlet 11 of the drain pump 11, which prevents the water and/or odor of the drain line from being retrograde to the drain pump 11 or even retrograde to the wash outer cylinder. The check valve 2 includes a valve body including a valve chamber and a sealing table 23 disposed upstream of the valve chamber, wherein the valve chamber is movably provided with a valve plug 22, and the valve plug 22 is drained Move the drain passage of the sealing station under water pressure. The upstream of the valve chamber communicates with the water outlet 11 of the drain pump 11, and the water discharged by the drain pump 11 flows downstream from the valve chamber. Under the action of the check valve 2, water cannot flow from the downstream of the valve chamber to the upstream of the valve chamber. Backflow. The drain pump 11 further includes a pump wheel 13 driven by the motor 14. When the drain pump 11 is in operation, the motor 14 drives the pump wheel 13 to rotate, and the pump wheel 13 drives the water in the drain pump 11 to move upstream of the check valve 2 The sealing table 23 and the valve plug 22 generate pressure, the valve plug 22 moves under the pressure, and the check valve 2 is opened; when the drain pump 11 is not working, the pump wheel 13 does not rotate, and the seal upstream of the valve chamber and the valve plug 22 are not When the pressure is generated, the valve plug 22 is moved back to the original position, and the check valve 2 is closed.

Further, a valve cover 21 is disposed downstream of the valve chamber, and the sealing table 23 and the valve cover 21 together with the valve body form a valve cavity, and the valve cover 21 is provided with at least one valve cover 21 drainage hole.

In the above arrangement, the valve cover 21 and the sealing table 23 together with the valve body form a valve chamber, and the valve plug 22 is movably disposed in the valve chamber. The provision of the valve cover 21 downstream of the valve chamber illustrates that the valve cover 21 is disposed downstream of the sealing station 23 in the direction of water flow, the arrangement of the valve cover 21 defining the movable range of the valve plug 22 while The valve plug 22 is prevented from moving out of the valve chamber of the check valve 2, causing the check valve 2 to fail. The valve cover 21 is provided with at least one valve cover 21 drain hole, and the drain hole of the valve cover 21 communicates with the valve chamber and the drain line, so that when the check valve 2 is opened, the drain pump 11 drains through the check valve 2 Pipeline drainage. The drain hole of the valve cover 21 may be a drain hole corresponding to the position of the valve plug 22; or may be a plurality of drain holes 211 distributed on the valve cover; or may be a large drain hole and a number corresponding to the position of the valve plug 22 A small drainage hole distributed outside the large drainage hole, in a preferred embodiment, the small drainage hole is uniformly distributed circumferentially around the large drainage hole. In order to prevent the valve plug 22 from being accidentally inserted or caught in the drain hole 211 on the valve cover, or moving out of the valve cavity from the drain hole 211 on the valve cover under pressure, the size of the drain hole on the valve cover 21 is smaller than The size of the valve plug 22.

Further, a downstream end of the valve chamber is provided with a stop, the sealing table 23 and the stop form a valve cavity together with the valve body, and the stop communicates with the drain line. Preferably, the stop is a retracted section. Pipeline.

In the above solution, the stop is a length of pipe with a reduced diameter, the length of the pipe is smaller than the size of the valve plug 22; or the stop is other that can restrict the valve plug 22 from moving within the valve cavity. structure. The stop is provided with a pipe having a reduced diameter that communicates with the drain pipe or a drain hole that connects the check valve 2 and the drain pipe. In order to prevent the valve plug 22 from being accidentally inserted or caught in the drain hole/reduced pipe in the stop, or under pressure from the drain hole/reduced pipe on the stop, the valve cavity is removed. The size of the drain hole on the stop/the diameter of the reduced pipe is smaller than the size of the plug 22.

Further, the sealing table 23 is provided with a drainage hole, and the valve plug 22 moves away from or seals the drainage hole under the pressure of the two ends of the sealing table 23. The one-way valve 2 opens the drainage pump 11 for one-way drainage or single The drain pump 11 is closed to the valve 2 and is not drained.

In the above arrangement, the sealing table 23 is provided with a drain hole for discharging water, and the pressure at both ends of the sealing table 23 causes the valve plug 22 to move within the valve chamber. The drain pump 1 further includes a pump impeller 13 driven by the motor 14, and when the pressure generated by the pump impeller 13 at one end of the sealing table 23 is greater than the pressure of the other end of the sealing station 23, the valve plug 22 leaves the sealing table under pressure. The drain hole 231, the check valve 2 is opened, and when the pump wheel 13 at one end of the sealing table 23 stops rotating and no pressure is generated, the valve plug 22 reverts to re-seal the drain hole 231 on the sealing table, the single The valve 2 is closed, the drain pump 1 stops draining and residual water and/or odor in the drain line cannot enter the drain pump 1 and enter the wash outer cylinder.

Further, the valve plug 22 is at least partially larger than the minimum size of the drain hole 231 on the sealing table. Preferably, the size of the drain hole 231 on the sealing table gradually becomes larger toward the downstream of the valve chamber, and the valve plug 22 is The size of the corresponding portion of the drain hole also increases accordingly.

In the above solution, the valve plug 22 is at least partially larger than the minimum size of the drain hole 231 on the sealing table, in order to prevent the size of the valve plug 22 from being small enough to penetrate the drain hole 231 on the sealing table, or because the size of the valve plug 22 is small. It is not possible to cooperate with the drain hole 231 on the sealing table to open the drain line to close the check valve 2. The size of the drain hole 231 on the sealing table gradually becomes larger toward the downstream of the valve chamber, and the size of the corresponding portion of the valve plug 22 and the drain hole is correspondingly larger, so that the check valve 2 is closed for better cooperation. To prevent unnecessary misalignment from occurring, the check valve 2 cannot be closed or the closing is not accurate enough. The gradually changing size facilitates the insertion of the valve plug 22 and facilitates the automatic adjustment of the misalignment during insertion.

Further, the valve cover 21/block is further provided with a limiting structure 24 for preventing the valve plug 22 from blocking the valve cover 21/block. Preferably, the limiting structure 24 is a convex extending toward the sealing table 23. Start.

In the above solution, the check valve 2 further includes a limiting structure 24, which prevents the valve plug 22 from blocking the valve cover 21/block, so as to prevent the one-way valve 2 from being drained or not drained. . Preferably, the limiting structure 24 is a protrusion facing the sealing table 23, the limiting protrusion faces the valve plug 22 and blocks the valve plug 22 from approaching the valve cover 21/block. The limiting protrusion may be an annular convex tube or an axially distributed protruding column. The size of the limiting structure 24 is smaller than the size of the valve plug 22.

Further, the valve plug 22 is provided with a limiting structure 24 for preventing the valve plug 22 from blocking the valve cover 21/block. Preferably, the limiting structure 24 is a protrusion extending toward the valve cover 21/block. .

In the above solution, the check valve 2 of the drain pump 1 further includes a limiting structure 24 that prevents the valve plug 22 from blocking the bonnet 21/block to cause poor drainage or drainage. Preferably, the limiting structure 24 is a protrusion facing the valve cover 21/block, and the limiting protrusion faces the valve cover 21/block to prevent the valve plug 22 from approaching the valve cover 21/block. The limiting protrusion may be an annular convex tube or an axially distributed protruding column. The size of the limiting structure 24 is smaller than the size of the valve plug 22.

Further, the check valve 2 further includes an elastic member 25 that abuts between the valve plug 22 and the valve cover 21/block, and the valve plug 22 is sealed by the elastic force of the elastic member 25. The drain hole 231 on the sealing table closes the check valve 2, and preferably, the elastic member 25 is a spring.

In the above arrangement, the valve plug 22 of the check valve 2 is moved away from the drain hole 231 on the sealing table against the elastic force of the elastic member 25 under the pressure of the water discharged from the drain pump 1, and the check valve 2 is opened. When the drainage is stopped, the valve plug 22 seals the drain hole 231 on the sealing table under the elastic force of the elastic member 25, and the check valve 2 is closed. The spring is a relatively common and easy to use elastic member 25, so a spring is preferably used.

Further, the valve plug 22 closes the check valve 2 by sealing the drain hole 231 on the sealing table under the action of its own gravity. Preferably, the valve plug 22 is provided as a ball valve plug 22, and the limiting structure 24 is disposed. On the bonnet 21/stop.

In the above solution, the valve plug 22 of the check valve 2 is moved away from the drain hole 231 on the sealing table against the gravity of the drain valve 1 under the pressure of the water discharged by the drain pump 1, the check valve 2 is opened; the drainage is stopped. At this time, the valve plug 22 seals the drain hole 231 on the sealing table under the action of its own gravity, and the check valve 2 is closed. The valve plug 22 is preferably a ball valve plug 22 because the valve plug 22 is prone to flipping or deflecting or shifting when moving. Moreover, since the ball valve plug 22 is relatively free, the limit structure 24 is disposed on the valve cover 21 in order to prevent the limit from acting, and the limit structure 24 is not disposed on the ball valve plug 22.

The present invention also provides a washing machine comprising a drain pump 1 as described above, the drain pump 1 further comprising a pump wheel 13 driven by a motor 14, when the drain pump 1 is started, the drain pump 1 is activated, The pump impeller 13 begins to rotate under the action of the motor 14, and the valve plug 22 overcomes the elastic force of the elastic member 25 under the pressure of the drainage water and/or moves away from the gravity of the valve plug 22 itself, leaving the drain hole 231 on the sealing table. When the check valve 2 is opened, the drain pump 1 is drained; when the drain pump 1 is not drained, the pump wheel stops rotating, and the drain water pressure received by the valve plug 22 disappears, and is performed by the elastic force of the elastic member 25 or its own gravity. The movement is resumed, the drain hole 231 on the sealing table is sealed, the check valve 2 is closed, and the drain pump 1 is not drained.

Further, the washing machine drain pump 1 has a drain height of 10 cm or more.

In the above solution, when the drain pump 1 is activated, the motor 14 inside the drain pump 1 drives the pump wheel 13 to rotate, and the valve plug 22 leaves the drain hole against the elastic force and/or own gravity under the action of the drainage water pressure, the one-way Valve 2 is open. The drain water pressure received by the valve plug 22 is related to the drain height of the washing machine drain pump 1, and the higher the drain height, the greater the drain water pressure that the valve plug 22 receives. Under normal circumstances, when the drainage height is greater than or equal to 10 cm, the drainage water pressure received can leave the drainage hole against the elastic force and/or own gravity, and the check valve 2 is opened. In a preferred embodiment, the drainage pump 1 has a drainage height of about 25 cm, and such drainage height greatly reduces the drainage noise at the end of the drainage period, because at the end of the drainage period, the drainage pump 1 is internally mixed with a large amount of air, and the pump impeller 13 is at a high speed. Operation, stirring air and water, unable to form pressure, the valve plug 22 is inserted into the drainage hole under the action of elastic force and/or self-gravity, which greatly reduces the drainage noise. At the same time, after the drain pump 1 is powered off, the valve plug 22 is inserted into the drain hole, and the water in the drain line cannot be recirculated, so that there is little water remaining inside the washing machine. After the washing is completed, since the seal insertion of the valve plug 22 closes the check valve 2, the odorous mold of the sewer cannot enter the inside of the washing machine through the drain line.

Embodiment 1

As shown in FIG. 1-2, in the present embodiment, a drain pump 1 includes a water outlet 11, and the water outlet 11 is provided with a check valve 2, and the check valve 2 includes a valve body, and the valve body The utility model comprises a valve chamber and a sealing table 23 disposed upstream of the valve chamber. The valve chamber is movably provided with a valve plug 22, and the valve plug 22 moves under the pressure of the drainage water to open the drainage passage of the sealing station.

A valve cover 21 is disposed downstream of the valve chamber, and the sealing table 23 and the valve cover 21 together with the valve body form a valve chamber, and the valve cover 21 is provided with at least one valve cover 21 drainage hole.

The sealing table 23 is provided with a drainage hole, and the valve plug 22 moves away from or seals the drainage hole under the pressure of the two ends of the sealing table 23. The one-way valve 2 opens the drainage pump 1 for one-way drainage or the one-way valve 2 Close the drain pump 1 without draining.

The valve plug 22 is at least partially larger than a minimum size of the drain hole 231 on the sealing table, the size of the drain hole 231 on the sealing table gradually becomes larger toward the downstream of the valve chamber, and the corresponding portion of the valve plug 22 and the drain hole The size is also correspondingly larger.

The valve cover 21 is further provided with a limiting structure 24 for preventing the valve plug 22 from blocking the valve cover 21, and the limiting structure 24 is a protrusion extending toward the sealing table 23.

The check valve 2 further includes an elastic member 25 that abuts between the valve plug 22 and the valve cover 21/block, and the valve plug 22 seals the sealing table under the elastic force of the elastic member 25. The upper drain hole 231 closes the check valve 2, and the elastic member 25 is a spring.

The present embodiment also proposes a washing machine comprising the above-described drain pump 1, the drain pump 1 of the drain pump 1 further comprising a pump wheel 13 driven by a motor 14.

When draining, the drain pump 1 is started. As shown in FIG. 2, the pump wheel 13 starts to rotate under the action of the motor 14, and the valve plug 22 moves against the elastic force of the elastic member 25 under the action of the drainage water pressure, leaving the opening on the sealing table 23. The check valve 2 is opened, and the drain pump 1 is drained.

When the water is not drained, the drain pump 1 stops working. As shown in FIG. 1, the drain water pressure received by the valve plug 22 disappears, and the resilience movement is performed under the elastic force of the elastic member 25 to seal the drain hole 231 on the sealing table. The one-way valve 2 is closed and the drain pump 1 is not drained.

The washing machine drain pump 1 has a drain height of 10 cm or more.

Embodiment 2

In the present embodiment, a drain pump 1 includes a water outlet 11, and the water outlet 11 is provided with a check valve 2, the check valve 2 includes a valve body, the valve body includes a valve chamber and is disposed at the valve A sealing table 23 upstream of the cavity, in which a valve plug 22 is movably disposed, the valve plug 22 moves under the action of drainage water pressure to open the drainage passage of the sealing table.

Compared with the first embodiment, the difference is that the valve chamber is provided with a stop downstream, the sealing table 23 and the stop form a valve cavity together with the valve body, and the stop communicates with the drain line, and the stop is A retracted pipe.

The stop is also provided with a limiting structure 24 for preventing the valve plug 22 from blocking the stop. The limiting structure 24 is a protrusion extending toward the sealing table 23.

Embodiment 3

The difference from the first embodiment is that the valve plug 22 is provided with a limiting structure 24 for preventing the valve plug 22 from blocking the valve cover 21 / the stop. Preferably, the limiting structure 24 is facing the valve cover 21 . / The extension of the stop extends.

Embodiment 4

As shown in FIG. 3, in the present embodiment, a drain pump 1 includes a water outlet 11, and the water outlet 11 is provided with a check valve 2, the check valve 2 includes a valve body, and the valve body includes a The valve chamber and the sealing table 23 disposed upstream of the valve chamber are movably provided with a valve plug 22, and the valve plug 22 moves under the pressure of the drainage water to open the drainage passage of the sealing station.

Compared with the first embodiment, the difference is

The valve plug 22 is provided as a spherical valve plug 22, and the limiting structure 24 is disposed on the valve cover 21, and the valve plug 22 seals the drain hole 231 on the sealing table under its own gravity to close the check valve 2.

Embodiment 5

Compared with the first embodiment, the valve cover 21 is provided with at least one large drainage hole, and a plurality of small drainage holes are provided, and the small drainage holes are uniformly distributed circumferentially on the valve cover 21.

Embodiment 6

Compared with the first embodiment, the difference is that the drainage level of the washing machine drain pump 1 is about 25 cm in order to reduce the noise at the end of the drainage of the washing machine drain pump 1.

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention, and any technology that is familiar with the present patent. Those skilled in the art can make some modifications or modifications to equivalent embodiments by using the technical content of the above-mentioned hints without departing from the technical scope of the present invention, but the technology according to the present invention does not deviate from the technical solution of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments are still within the scope of the present invention.

Claims

A drain pump includes a water outlet, a check valve is disposed at the water outlet, the check valve includes a valve body, and the valve body includes a valve chamber and a sealing platform disposed upstream of the valve chamber. A valve plug is disposed in the valve chamber, and the valve plug moves under the pressure of the drainage water to open the drainage passage of the sealing platform.
A drain pump according to claim 1, wherein a valve cover is disposed downstream of the valve chamber, and the seal table and the valve cover form a valve chamber together with the valve body, and the valve cover is provided with at least one Bonnet drain hole.
A drain pump according to claim 1, wherein a stop is disposed downstream of the valve chamber, and the seal table and the stop form a valve chamber together with the valve body, and the stop communicates with the drain line. Preferably, the stop is a retracted pipe.
A drain pump according to any one of claims 1 to 2, wherein the sealing table is provided with a drain hole, and the valve plug moves away from or seals the drain under the pressure of the two ends of the sealing table. Hole, check valve open drain pump one-way drain or check valve closed drain pump undrained.
A drain pump according to claim 4, wherein said valve plug is at least partially larger than a minimum size of a drain hole on the sealing table, and preferably, the size of the drain hole on said sealing table is downstream of the valve chamber Gradually, the size of the corresponding portion of the valve plug and the drain hole is correspondingly increased.
A drain pump according to claim 2 or 3, characterized in that the bonnet/block is further provided with a limiting structure for preventing the valve plug from blocking the bonnet/block. Preferably, the limit is The bit structure is a protrusion that extends toward the sealing station.
A drain pump according to any one of claims 1 to 3, characterized in that the valve plug is provided with a limiting structure for preventing the valve plug from blocking the bonnet/block. Preferably, the limit is The structure is a projection that extends toward the bonnet/block.
A drain pump according to any one of claims 1 to 7, wherein the one-way valve further comprises an elastic member that abuts between the valve plug and the valve cover/block. The valve plug seals the drain hole on the sealing table under the elastic force of the elastic member to close the one-way valve. Preferably, the elastic member is a spring.
A drain pump according to any one of claims 1 to 7, wherein the valve plug seals the drain hole on the sealing table by its own gravity to close the check valve. Preferably, the valve plug It is set as a ball valve plug, and the limit structure is arranged on the valve cover/stop.
A washing machine characterized by comprising a drain pump according to any one of claims 1-9.