CN107904870B

CN107904870B - Drain pump and washing machine with same

Info

Publication number: CN107904870B
Application number: CN201710993745.6A
Authority: CN
Inventors: 谈路福; 余鑫; 刘志刚; 赵长兴
Original assignee: Wuxi Little Swan Co Ltd
Current assignee: Wuxi Little Swan Electric Co Ltd
Priority date: 2017-10-23
Filing date: 2017-10-23
Publication date: 2020-02-18
Anticipated expiration: 2037-10-23
Also published as: CN107904870A

Abstract

The invention discloses a draining pump and a washing machine with the same, wherein the draining pump comprises: the pump comprises a pump shell, a water inlet and a water outlet, wherein a water drainage cavity is arranged in the pump shell, and the pump shell is provided with the water inlet and the water outlet which are communicated with the water drainage cavity; the piston assembly is movably arranged on the pump shell and defines an air storage cavity which is communicated with the water drainage cavity and has variable volume on the pump shell; the impeller is rotatably arranged in the drainage cavity; and the driving device is arranged on the pump shell and is in transmission connection with the impeller. According to the drainage pump provided by the embodiment of the invention, the piston assembly is arranged, and the air storage cavity with the variable volume is limited by the piston assembly and the pump shell, so that the piston assembly can move according to the working condition of the drainage pump, the volume of the air storage cavity is increased or reduced, the water flow can be ensured to be normally sucked and discharged, the air trapping problem is effectively solved, and the working efficiency of the drainage pump is further improved.

Description

Drain pump and washing machine with same

Technical Field

The invention relates to the technical field of washing machines, in particular to a draining pump and a washing machine with the same.

Background

Washing machines in the related art adopt the upward-type drainage pump to drain water, the drainage pump often has the phenomenon of air trapping, namely a certain amount of air exists in the impeller cavity, and the impeller cannot discharge the water in the cavity out of the cavity due to rotation, so that the drainage pump cannot drain the water normally. Accordingly, there is a need for improvement.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the drainage pump, and the drainage pump does not have the air trapping phenomenon during working.

The invention also provides a washing machine with the drainage pump.

According to an embodiment of the first aspect of the invention, the drain pump comprises: the pump comprises a pump shell, a water inlet and a water outlet, wherein a water drainage cavity is arranged in the pump shell, and the pump shell is provided with the water inlet and the water outlet which are communicated with the water drainage cavity; the piston assembly is movably arranged on the pump shell and defines an air storage cavity which is communicated with the water drainage cavity and has variable volume on the pump shell; the impeller is rotatably arranged in the drainage cavity; and the driving device is arranged on the pump shell and is in transmission connection with the impeller.

According to the drainage pump provided by the embodiment of the invention, the piston assembly is arranged, and the air storage cavity with the variable volume is limited by the piston assembly and the pump shell, so that the piston assembly can move according to the working condition of the drainage pump, the volume of the air storage cavity is increased or reduced, the water flow can be ensured to be normally sucked and discharged, the air trapping problem is effectively solved, and the working efficiency of the drainage pump is further improved.

According to one embodiment of the invention, the piston assembly comprises: a piston movably disposed in the pump housing and defining the air reservoir on the pump housing; and an elastic member respectively connected to the pump housing and the piston and providing an elastic force pushing the piston toward the drain chamber.

According to a further embodiment of the present invention, the pump housing has a piston mounting cylinder, the piston mounting cylinder has an end wall, the end wall is provided with a mounting opening, the piston is assembled in the mounting cylinder and extends out of the mounting opening, and the elastic member is arranged in the mounting cylinder and is respectively connected with the piston and the mounting cylinder.

According to a further embodiment of the invention, the piston comprises: the rod part penetrates through the mounting opening; the head is arranged at one end of the rod part and is positioned outside the mounting cylinder; the sealing part is arranged at the other end of the rod part and is positioned in the mounting cylinder, and the sealing part and the mounting cylinder define the air storage cavity.

Optionally, the head portion has a cross-sectional area greater than a cross-sectional area of the mounting opening.

Alternatively, an outer peripheral edge of the seal portion is in sealing contact with an inner peripheral wall surface of the mounting tube.

Optionally, the elastic element is a spring sleeved on the rod portion, one end of the spring abuts against the end wall, and the other end of the spring abuts against the sealing portion.

Optionally, the sealing portion is a first sealing ring sleeved on the rod portion.

The drain pump according to an embodiment of the present invention further includes: the filter, the drainage chamber includes filter chamber and the impeller cavity that communicates each other, the filter is located in the filter chamber and the impeller is rotatably located the impeller cavity, the water inlet with the gas storage chamber respectively with filter chamber intercommunication just the delivery port with the impeller cavity intercommunication.

According to a further embodiment of the invention, the pump housing comprises: the filter cavity and the impeller cavity are formed in the shell main body, the piston assembly and the shell main body define the air storage cavity, the water inlet and the water outlet are formed in the shell main body, and the driving device is installed on the shell main body; an end cap removably mounted to the shell body and capping the drain cavity.

Furthermore, a second sealing ring for sealing a gap between the filter and the shell main body is arranged on the filter.

The washing machine according to the second aspect embodiment of the present invention includes the drain pump according to the above embodiment.

According to the washing machine provided by the embodiment of the invention, the drainage pump is adopted, so that the normal drainage of the washing machine can be ensured, and the normal work of the washing machine is ensured.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is an exploded view of a drain pump according to an embodiment of the present invention;

FIG. 2 is an assembly view of a pump housing and a piston of a drain pump according to an embodiment of the present invention;

FIG. 3 is an assembled view of a pump housing and piston assembly of a sump pump according to an embodiment of the present invention, wherein the piston assembly is in a retracted state;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a front view of the structure shown in FIG. 3;

FIG. 6 is an assembled view of a pump housing and piston assembly of a sump pump according to an embodiment of the present invention, wherein the piston assembly is in an extended state;

FIG. 7 is a front view of the structure shown in FIG. 6;

FIG. 8 is a top view of the structure shown in FIG. 6;

FIG. 9 is a cross-sectional view taken along line B-B of FIG. 8;

fig. 10 is a sectional view taken along line C-C in fig. 8.

Reference numerals:

a drain pump (100) for draining the water,

a pump shell 10, a drainage cavity 101, a filter cavity 1011, an impeller cavity 1012, a water inlet 102, a water outlet 103, a piston mounting cylinder 11, an end wall 111, a mounting opening 112, a shell main body 12, an end cover 13,

the piston assembly 20, the air storage chamber 201, the piston 21, the rod portion 211, the head portion 212, the seal portion (first seal ring) 213, the elastic member 22,

impeller 30, drive unit 40, filter 50, second sealing washer 51.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A drain pump 100 according to an embodiment of the present invention will be described with reference to fig. 1 to 10.

As shown in fig. 1 to 10, a drain pump 100 according to an embodiment of the present invention includes: a pump housing 10, a piston assembly 20, an impeller 30, and a driving device 40.

A water drainage cavity 101 is formed in the pump shell 10, a water inlet 102 and a water outlet 103 are formed in the pump shell 10, and the water inlet 102 and the water outlet 103 are respectively communicated with the water drainage cavity 101. The piston assembly 20 is movably disposed at the pump housing 10, the piston assembly 20 is disposed at the pump housing 10 to define an air storage chamber 201 with the pump housing 10 for storing air in the air storage chamber 201, the air storage chamber 201 is communicated with the water discharge chamber 101, and the volume of the air storage chamber 201 can be changed with the movement of the piston assembly 20. The impeller 30 is rotatably provided in the drain chamber 101. The driving device 40 is mounted to the pump housing 10 and is drivingly connected to the impeller 30, thereby driving the impeller 30 to rotate.

When the water-saving drainage device works, the driving device 40 drives the impeller 30 to rotate in a certain direction, when the impeller 30 rotates rapidly, the impeller 30 drives water flow to rotate, water driven to rotate by the impeller 30 is thrown out under the action of centrifugal force, so that a negative pressure area is formed at the rotation center of the impeller 30, water in the water inlet 102 is sucked into the drainage cavity 101 and then is discharged from the water outlet 103, and the operation is repeated.

In this process, when rivers were full of whole drainage chamber 101, piston assembly 20 removed under hydraulic effect to increase the volume of gas storage chamber 201, thereby shift the air that traps in drainage chamber 101 to the gas storage chamber 201 in, guarantee that rivers can fill whole drainage chamber 101, can form sufficient pressure differential when drive arrangement 40 drive impeller 30 is rotatory like this, and then discharge rivers from delivery port 103, guarantee that drain pump 100 can normally drain.

According to the drainage pump 100 of the embodiment of the invention, the piston assembly 20 is arranged, and the air storage cavity 201 with the variable volume is defined by the piston assembly 20 and the pump shell 10, so that the piston assembly 20 can move according to the working condition of the drainage pump 100, the volume of the air storage cavity 201 is increased or reduced, the water flow can be ensured to be normally sucked and discharged, the air trapping problem is effectively solved, and the working efficiency of the drainage pump 100 is further improved.

As shown in fig. 3-5, according to one embodiment of the present invention, the piston assembly 20 includes: a piston 21 and a resilient member 22. The piston 21 is movably provided to the pump housing 10, and the piston 21 defines an air storage chamber 201 on the pump housing 10. The elastic member 22 is connected to the pump housing 10 and the piston 21, respectively, and provides an elastic force for pushing the piston 21 toward the drain chamber 101.

Specifically, when water flow enters the drainage cavity 101 from the water inlet 102, the piston 21 moves in a direction away from the drainage cavity 101 under the action of water pressure, and the volume of the air storage cavity 201 is gradually increased, so that air trapped in the drainage cavity 101 is exhausted to the air storage cavity 201, and the whole drainage cavity 101 can be filled with water flow; after the water in the drainage cavity 101 is drained, the elastic member 22 pushes the piston 21 to move towards the drainage cavity 101, so that the piston 21 is reset to the initial position, and the reciprocating operation is performed, thereby effectively solving the problem of air trapping and ensuring the normal drainage of the drainage pump 100.

In some examples, the pump housing 10 has a piston mounting cylinder 11, the piston mounting cylinder 11 has an end wall 111, and the end wall 111 is provided with a mounting opening 112, that is, one end of the piston mounting cylinder 11 is connected to the pump housing 10, and the other end forms a free end, the piston mounting opening 112 is formed at the free end of the mounting cylinder 11, the piston 21 is assembled in the mounting cylinder 11 and extends out of the mounting opening 112, and the elastic member 22 is arranged in the mounting cylinder 11 and is respectively connected with the piston 21 and the mounting cylinder 11, so that the installation is convenient.

In some examples, the piston 21 includes: a stem portion 211, a head portion 212, and a sealing portion 213. The rod portion 211 forms a rod member extending in a vertical direction, and one end of the rod portion 211 passes through the mounting opening 112. The head 212 is disposed at one end of the rod 211 and is located outside the mounting tube 11. The sealing part 213 is arranged at the other end of the rod part 211 and is positioned in the mounting cylinder 11, and the sealing part 213 and the mounting cylinder 11 define the air storage cavity 201, so that the air storage cavity 201 is isolated from the outside, and the relative tightness of the air storage cavity 201 is ensured.

In some specific examples, the cross-sectional area of the head 212 is larger than that of the mounting opening 112, that is, the head 212 can achieve a limiting effect during the movement of the piston 21, ensure that one end of the piston 21 is always located outside the mounting cylinder 11, and facilitate the connection between the piston 21 and other components.

In some specific examples, the outer peripheral edge of the sealing portion 213 is in sealing contact with the inner peripheral wall surface of the mounting cylinder. For example, the cross-sectional area of the sealing portion 213 is larger than that of the rod portion 211, and the outer peripheral wall of the sealing portion 213 is always in close contact with the inner peripheral wall of the mounting tube 11, so that the sealing performance of the gas storage chamber 201 is ensured, and gas and liquid are prevented from leaking between the outer peripheral wall of the sealing portion 213 and the inner peripheral wall of the mounting tube 11.

In some embodiments, the elastic member 22 is a spring sleeved on the rod portion 211, and one end of the spring abuts against the end wall 111 and the other end abuts against the sealing portion 213. When water flow enters the drainage cavity 101 from the water inlet 102, the piston 21 moves in a direction far away from the drainage cavity 101 under the action of water pressure, the spring is gradually compressed, and the volume of the air storage cavity 201 is gradually increased, so that air trapped in the drainage cavity 101 is discharged to the air storage cavity 201, and the whole drainage cavity 101 can be filled with water flow; when the water in the drain chamber 101 is drained, the spring pushes the piston 21 to move toward the drain chamber 101 to return the piston 21 to the initial position.

Optionally, the sealing portion 213 is a first sealing ring sleeved on the rod portion 211, and has a simple structure and is convenient to install.

As shown in fig. 1 and fig. 8 to 10, the drain pump 100 according to the further embodiment of the present invention further includes: the filter 50 and the drain cavity 101 comprise a filter cavity 1011 and an impeller cavity 1012 which are communicated with each other, the water inlet 102 and the air storage cavity 201 are respectively communicated with the filter cavity 1011, the water outlet 103 is communicated with the impeller cavity 1012, the filter 50 is arranged in the filter cavity 1011, and the impeller 30 is rotatably arranged in the impeller cavity 1012. By arranging the filter 50 in the filter chamber 1011, foreign matters such as swarf in the water entering from the water inlet 102 can be filtered, and the foreign matters are prevented from entering the impeller chamber 1012 to affect the normal operation of the impeller 30 and the driving device 40.

As shown in fig. 1 and 10, in some examples, the pump casing 10 includes: a housing body 12 and an end cap 13. The housing main body 12 defines a filter chamber 1011 and an impeller chamber 1012 therein, the piston assembly 20 is provided to the housing main body 12 and the piston assembly 20 and the housing main body 12 define the air storage chamber 201, the water inlet 102 and the water outlet 103 are formed in the housing main body 12, and the driving device 40 and the filter 50 are mounted to the housing main body 12. The end cap 13 is detachably mounted to the housing body 12 and covers the drain chamber 101, so that the filter 50 can be fastened, and the pump housing 10 is simple and compact in structure, easy to process and manufacture, and convenient to mount.

In some alternative examples, the filter 50 is provided with a second sealing ring 51 for sealing a gap between the filter 50 and the case main body 12. Thereby ensuring sealability between the filter 50 and the case main body 12 and preventing water in the pump drain chamber 101 from leaking between the filter 50 and the case main body 12.

A drain pump 100 according to an embodiment of the invention is described below with reference to fig. 1-10.

As shown in fig. 1 to 10, the drain pump 100 includes a piston mounting cylinder 11, a casing main body 12, an end cover 13, a piston assembly 20, an impeller 30, a driving device 40, and a filter 50. Wherein the driving device 40 is a motor.

The piston mounting cylinder 11 is attached to the housing main body 12 and the housing main body 12 has a water inlet 102 and a water outlet 103, and the end cap 13 is mounted to the housing main body 12. A drain chamber 101 is defined in the housing main body 12, the drain chamber 101 includes a filter chamber 1011 and an impeller chamber 1012 which communicate with each other, the filter 50 is installed in the filter chamber 1011, and the impeller 30 is installed in the impeller chamber 1012 and is driven to rotate by the driving means 40.

The piston assembly 20 includes a piston 21 and a spring, one end of a rod portion 211 of the piston 21 is connected with a sealing portion 213, the other end of the rod portion 211 is connected with a head portion 212, one end of the rod portion 211 extends into the piston mounting cylinder 11, the sealing portion 213 and the piston mounting cylinder 11 define an air storage chamber 201, the head portion 212 on the rod portion 211 is exposed outside the piston mounting cylinder 11, and the spring is sleeved on the rod portion 211 and is stopped between the piston mounting cylinder 11 and the sealing portion 213.

When the motor is powered on, the motor drives the impeller 30 to rotate in a certain direction, when the impeller 30 rotates rapidly, the impeller 30 drives the water flow to rotate, the water driven to rotate by the impeller 30 is thrown out under the action of centrifugal force, a negative pressure area is formed at the rotating center of the impeller 30, so that the water in the water inlet 102 is sucked into the impeller cavity 1012 and then is discharged from the water outlet 103, and the operation is continuous.

Meanwhile, when water flow enters from the water inlet 102 and fills the whole drainage cavity 101, under the action of water pressure, the piston 21 moves upwards, air trapped in the drainage cavity 101 enters the air storage cavity 201, the air storage cavity 201 and the impeller cavity 1012 are separated spaces, so that the whole drainage cavity 101 (the filter cavity 1011 and the impeller cavity 1012) can be filled with the water flow, when the motor drives the impeller 30 to rotate, enough pressure difference can be formed, finally, the water flow is discharged from the water outlet 103, and after the water flow is emptied, the piston 21 is reset to the initial position under the action of the force of the spring. Therefore, the air trapping device is continuous and can repeatedly act, and the air trapping problem is effectively solved.

A washing machine (not shown) according to a second aspect embodiment of the present invention includes the drain pump 100 according to the above-described embodiment. Since the drainage pump 100 according to the embodiment of the present invention has the above technical effects, the washing machine according to the embodiment of the present invention also has the above technical effects, that is, the washing machine has a simple structure, and does not have a trapping phenomenon during drainage, thereby ensuring that the washing machine can drain water normally and improving drainage efficiency.

Other configurations and operations of the washing machine according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A drain pump (100), comprising:

the water pump comprises a pump shell (10), wherein a drainage cavity (101) is arranged in the pump shell (10), and a water inlet (102) and a water outlet (103) which are communicated with the drainage cavity (101) are formed in the pump shell (10);

a piston assembly (20), the piston assembly (20) being movably arranged on the pump shell (10) and defining an air storage cavity (201) which is communicated with the water drainage cavity (101) and has variable volume on the pump shell (10);

the impeller (30), the said impeller (30) is set up in the said drainage cavity (101) rotatably;

a drive device (40), wherein the drive device (40) is arranged on the pump shell (10) and is in transmission connection with the impeller (30),

wherein the piston assembly (20) comprises:

a piston (21), the piston (21) being movably provided to the pump housing (10) and defining the air reservoir chamber (201) on the pump housing (10);

an elastic member (22), the elastic member (22) being connected to the pump housing (10) and the piston (21), respectively, and providing an elastic force that pushes the piston (21) toward the drain chamber (101).

2. A drain pump (100) according to claim 1, characterized in that the pump casing (10) has a piston mounting cylinder (11), the piston mounting cylinder (11) has an end wall (111) and the end wall (111) is provided with a mounting opening (112), the piston (21) is fitted in the mounting cylinder (11) and protrudes from the mounting opening (112), and the elastic member (22) is provided in the mounting cylinder (11) and is connected to the piston (21) and the mounting cylinder (11), respectively.

3. A drain pump (100) according to claim 2, characterized in that the piston (21) comprises:

a stem (211), the stem (211) passing through the mounting opening (112);

the head (212) is arranged at one end of the rod part (211) and is positioned outside the mounting cylinder (11);

the sealing part (213), sealing part (213) are located the other end of pole portion (211) just is located installation section of thick bamboo (11) are interior, sealing part (213) with installation section of thick bamboo (11) are injectd gas storage chamber (201).

4. A drain pump (100) according to claim 3, characterized in that the cross-sectional area of the head (212) is larger than the cross-sectional area of the mounting opening (112).

5. A drain pump (100) according to claim 3, characterized in that the outer peripheral edge of the sealing portion (213) is in sealing contact with the inner peripheral wall surface of the mounting cylinder (11).

6. A drain pump (100) according to claim 3, characterized in that the elastic element (22) is a spring fitted on the stem (211), one end of the spring bearing against the end wall (111) and the other end bearing against the seal (213).

7. A drain pump (100) according to claim 3, characterized in that the sealing portion (213) is a first sealing ring sleeved on the rod portion (211).

8. A drain pump (100) according to any of claims 1-7, further comprising:

the filter (50), the drainage chamber (101) includes filter chamber (1011) and impeller chamber (1012) that communicate each other, filter (50) are located in filter chamber (1011) and impeller (30) are rotatably located impeller chamber (1012), water inlet (102) and gas storage chamber (201) respectively with filter chamber (1011) intercommunication and delivery port (103) with impeller chamber (1012) intercommunication.

9. A drain pump (100) according to claim 8, characterized in that the pump casing (10) comprises:

a housing main body (12), the filter cavity (1011) and the impeller cavity (1012) being formed in the housing main body (12) and the piston assembly (20) and the housing main body (12) defining the gas storage cavity (201), the water inlet (102) and the water outlet (103) being formed in the housing main body (12), the driving device (40) being mounted to the housing main body (12);

an end cap (13), the end cap (13) being detachably mounted to the case main body (12) and covering the drain chamber (101).

10. A drain pump (100) according to claim 9, characterized in that the filter (50) is provided with a second sealing ring (51) for sealing the gap between the filter (50) and the housing body (12).

11. A washing machine, characterized in that it comprises a drain pump (100) according to any one of claims 1-10.