CN111329427B

CN111329427B - Dish washer pump structure and dish washer

Info

Publication number: CN111329427B
Application number: CN202010279930.0A
Authority: CN
Inventors: 赵志纯
Original assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Current assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2021-05-07
Anticipated expiration: 2040-04-10
Also published as: CN111329427A

Abstract

The application provides a dishwasher pump structure and a dishwasher, wherein the dishwasher pump structure comprises a pump body, a first driving assembly and a second driving assembly; the pump body comprises a main body, a water inlet pipe and a water outlet pipe, wherein the water inlet pipe and the water outlet pipe are arranged on the main body and are respectively communicated with an inner cavity of the main body; the first driving assembly is connected with the water inlet pipe and comprises a first driver and a first push rod connected with the first driver, and the first push rod is driven by the first driver to movably enter and exit the water inlet pipe; the second driving component is connected with the water outlet pipe and comprises a second driver and a second push rod connected with the second driver, and the second push rod is driven by the second driver to movably enter and exit the water outlet pipe. The application provides a dishwasher pump structure can combine the function of washing pump and drainage pump together to reach effective reduce cost and reduce the purpose that the space occupy.

Description

Dish washer pump structure and dish washer

Technical Field

The application belongs to the technical field of household appliances, and more particularly relates to a dishwasher pump structure and a dishwasher.

Background

Today, as the standard of living increases, more and more consumers choose to use dishwashers instead of the cumbersome manual dishwashing activities. In the conventional dishwasher, in order to perform normal washing and draining functions, it is common to include a cup communicating with an external water source, a washing system for spraying washing water to wash dishes, a drain pipe, a washing pump, and a drain pump. One end of the washing pump is connected with the water cup, and the other end of the washing pump is connected with relevant parts in the washing system, such as a spray arm and the like, so that water in the water cup is conveyed to the spray arm, and then high-pressure jet flow is generated to clean tableware; and the drainage pump is communicated with the drainage pipe and used for conveying water to the drainage pipe for drainage. Although this design can perform the washing and draining functions properly, the provision of both a washing pump and a draining pump in the dishwasher makes the dishwasher expensive and space consuming.

Disclosure of Invention

An object of the embodiment of this application is to provide a dishwasher pump structure to solve the high-cost and big technical problem that the space occupies that exists among the prior art because of dishwasher sets up washing pump and drain pump respectively.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: there is provided a dishwasher pump structure comprising:

the pump body comprises a main body, a water inlet pipe and a water outlet pipe, wherein the water inlet pipe and the water outlet pipe are arranged on the main body and are respectively communicated with an inner cavity of the main body;

the first driving assembly is connected with the water inlet pipe and comprises a first driver and a first push rod connected with the first driver, and the first push rod is driven by the first driver to movably enter and exit the water inlet pipe; and the number of the first and second groups,

the second driving component is connected with the water outlet pipe and comprises a second driver and a second push rod connected with the second driver, and the second push rod is driven by the second driver to movably enter and exit the water outlet pipe.

Optionally, the pump structure of the dishwasher further includes a first connecting pipe and a second connecting pipe, one end of the first connecting pipe is communicated with the water inlet pipe, the other end of the first connecting pipe is connected with the first driver, and the first push rod is sleeved in a pipe cavity of the first connecting pipe; one end of the second connecting pipe is communicated with the water outlet pipe, the other end of the second connecting pipe is connected with the second driver, and the second push rod is sleeved in a pipe cavity of the second connecting pipe.

Optionally, the first driving assembly further includes a first fixing seat, one end of the first connecting pipe, which is away from the water inlet pipe, is provided with a first fixing joint, and the first driver is connected with the first fixing seat and detachably connected with the water inlet pipe through connection between the first fixing seat and the first fixing joint;

the second drive assembly further comprises a second fixing seat, a second fixing joint is arranged at one end of the water outlet pipe, which is far away from the second connecting pipe, the second driver is connected with the second fixing seat, and the detachable connection of the water inlet pipe is realized through the connection of the second fixing seat and the second fixing joint.

Optionally, the first driving assembly further comprises a first sealing sleeve sleeved on the first push rod, and the outer peripheral surface of the first sealing sleeve is attached to the inner wall of the first connecting pipe;

the second driving assembly further comprises a second sealing sleeve sleeved on the second push rod, and the outer peripheral surface of the second sealing sleeve is attached to the inner wall of the second connecting pipe.

Optionally, the first sealing sleeve includes a first sleeve and a first sleeve head that are connected to each other, the first sleeve is configured to accommodate the first push rod, the first sleeve head is disposed at an end of the first sleeve facing the first actuator and designed to face the opening of the first fixing base, an opening edge of the first sleeve head extends radially outward to form a first sealing skirt, the first sealing skirt is clamped between the first fixing base and the first fixing connector, and an arc-shaped sealing surface that is adapted to a shape of an inner wall of the water inlet pipe is disposed at a lower end of the first sleeve that is far away from the first actuator.

Optionally, a plurality of annular grooves are formed in the outer peripheral surface of the first push rod and/or the outer peripheral surface of the second push rod, and the plurality of annular grooves are axially arranged at intervals.

Optionally, the main part is the tube-shape, the inlet tube with the outlet pipe is all located on the outer peripheral face of main part, just the axis of inlet tube with the axis mutually perpendicular of outlet pipe, the axis of first connecting pipe with the axis of outlet pipe is parallel but with the axis of inlet tube is perpendicular, the axis of second connecting pipe with the axis of inlet tube is parallel but with the axis of outlet pipe is perpendicular.

Optionally, the dishwasher pump structure further comprises a brushless dc motor assembly mounted on the body of the pump body.

Optionally, the brushless dc motor assembly includes a brushless dc motor and a sealing connection plate connected to the brushless dc motor, the sealing connection plate is provided with a rotating wheel connected to a rotating shaft of the brushless dc motor, the sealing connection plate is connected to the main body in a sealing manner, and the rotating wheel is disposed in the inner cavity of the main body.

The application also provides a dishwasher, which comprises a washing system, a drain pipe and the dishwasher pump structure, wherein the inlet pipe is communicated with the washing system, and the outlet pipe is communicated with the drain pipe.

The application provides a dishwasher pump structure's beneficial effect lies in: compared with the prior art, this application dishwasher pump structure can promote the push rod action and plug up the pipeline that corresponds through driver during operation, and when the driver was out of work, the push rod did not act, then the design that the pipeline that corresponds was opened for the dishwasher pump structure of this application has into water washing state, drainage state and quiescent condition: in the water inlet washing state, the first driver does not work, the first push rod is in the state of withdrawing from the water inlet pipe and not working, the water inlet pipe is opened at the moment, water can be conveyed to a washing system through the water inlet pipe, and the second driver works to drive the second push rod to enter the water outlet pipe, so that the water outlet pipe is blocked and cannot discharge water; in a drainage state, the first driver works, the first push rod is driven to enter the water inlet pipe to block the passage of the water inlet pipe, so that sewage cannot enter the washing system, the second driver does not work, the second push rod is in an inactive state of exiting the water outlet pipe, and at the moment, the water outlet pipe is opened, so that the sewage can be smoothly discharged out of the dish washing machine; when the dishwasher is in a static state, the first driver and the second driver do not work, and the channels of the water inlet pipe and the water outlet pipe are both opened. Known by above use, in the technical scheme of this application, through two reliable and stable drivers of integrated installation on a pump body, and through the control of first driver and second driver to inlet tube and outlet pipe respectively, just can realize combining the function of washing pump and drainage pump together, can use a pump structure to replace washing pump and drain pump in the current dish washer, the connecting tube between original washing pump and the drain pump has also been saved simultaneously, so, not only can reduce spare part, also reduced the emergence probability of bad problem, thereby can effectively reduce cost and reduce the occupation in space.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1 is a schematic structural diagram of a pump structure of a dishwasher according to an embodiment of the present disclosure;

FIG. 2 is an exploded view of a dishwasher pump configuration provided in accordance with an embodiment of the present application;

FIG. 3 is a schematic cross-sectional view of a pump structure of a dishwasher according to an exemplary embodiment of the present disclosure in a water-in washing state;

FIG. 4 is a schematic cross-sectional view of a dishwasher pump according to an exemplary embodiment of the present disclosure in a draining state;

fig. 5 is a schematic cross-sectional view of a pump structure of a dishwasher according to an embodiment of the present application in a resting state.

The reference numbers illustrate:

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It should be noted that the terms of orientation such as left, right, up and down in the embodiments of the present application are only relative to each other or are referred to the normal use state of the product, and should not be considered as limiting.

Reference will now be made in detail to embodiments of the present application, 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 drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The embodiment of the application provides a dishwasher pump structure and a dishwasher comprising the same.

Referring to fig. 1 and 2, in one embodiment, the pump structure of the dishwasher includes a pump body 100, a first driving assembly 200, and a second driving assembly 300. The pump body 100 comprises a main body 110, a water inlet pipe 120 and a water outlet pipe 130, wherein the water inlet pipe 120 and the water outlet pipe 130 are both arranged on the main body 110 and are respectively communicated with an inner cavity 111 of the main body 110; the first driving assembly 200 is connected with the water inlet pipe 120, the first driving assembly 200 comprises a first driver 210 and a first push rod 220 connected with the first driver 210, and the first push rod 220 is driven by the first driver 210 to move in and out of the water inlet pipe 120; the second driving assembly 300 is connected to the water outlet pipe 130, the second driving assembly 300 includes a second driver 310 and a second push rod 320 connected to the second driver 310, and the second push rod 320 is driven by the second driver 310 to move in and out of the water outlet pipe 130.

It should be noted that the pump structure of the dishwasher is mainly applied to the dishwasher, but other appliances which need to solve the same problem and have suitable structures can also be applied to the technical solution of the present application. Here, in order to perform normal washing and draining functions, a dishwasher generally further includes a cup communicating with an external water source, a washing system for spraying washing water to wash dishes, and a drain pipe for draining dirty water after washing. In the present application, one end of the main body 110 of the pump body 100 is connected to a cup of a dishwasher, and particularly, can be connected to the cup through a clip 140, and the water inlet pipe 120 is communicated with a washing system (not shown), so that water can enter the inner cavity 111 of the pump body 100 from the cup, and then can be conveyed to the washing system through the water inlet pipe 120, and then be sprayed out through a spray arm and other components in the washing system, and meanwhile, the water outlet pipe 130 is communicated with a water outlet pipe (not shown) to facilitate the discharge of water. In this embodiment, the first and second drivers are each embodied as a wax motor, which typically includes a Positive Temperature Coefficient thermistor (PTC) mounted on a sealed container filled with solid wax; when the solid wax is heated to a controllable temperature by the energized thermistor, the solid wax melts and expands into liquid wax, driving a spring-loaded piston outward, which may pull or push the load inward; when the PTC thermistor is de-energized, the liquid wax cooling volume shrinks and the spring returns the piston to its initial position. Therefore, the wax motor is suitable for the scenes needing silent, smooth and efficient driving, the consumption of the wax motor is lower than 1W, and 1foot-pound (about 13.7kg) of power can be generated, so that the driving device has the advantages of superior performance, higher reliability, more cost saving and the like compared with a solenoid and other motor drivers.

Based on this structural design, as shown in fig. 3 to 5, in the in-service use process, can promote the push rod action and plug up the pipeline that corresponds through the driver during operation, and when the driver was out of work, the push rod did not act, then the design that the pipeline that corresponds was opened for the dishwasher pump structure of this application has into water washing state, drainage state and quiescent condition: in the water inlet washing state, the first driver 210 does not work, the first push rod 220 is in the state of exiting the water inlet pipe 120 and not working, at this time, the water inlet pipe 120 is opened, water can be conveyed to the washing system through the water inlet pipe 120, and the second driver 310 works to drive the second push rod 320 to enter the water outlet pipe 130, so that the water outlet pipe 130 is blocked and cannot be drained; in the drainage state, the first driver 210 works, the first push rod 220 is driven to enter the water inlet pipe 120 to block the passage of the water inlet pipe 120, so that sewage cannot enter the washing system, the second driver 310 does not work, the second push rod 320 is in the inactive state of exiting the water outlet pipe 130, at the moment, the water outlet pipe 130 is opened, and the sewage can be smoothly discharged out of the dishwasher; when the dishwasher is in a static state, the first driver 210 and the second driver 310 are not operated, and the channels of the water inlet pipe 120 and the water outlet pipe 130 are opened. It can be known from the above using process that, in the technical scheme of the present application, two drivers which work reliably and stably are installed on one pump body 100 in an integrated manner, and the water inlet pipe 120 and the water outlet pipe 130 are controlled by the first driver 210 and the second driver 310 respectively, so that the functions of the washing pump and the drainage pump can be combined together, that is, the washing pump and the drainage pump in the existing dishwasher can be replaced by using one pump structure, and meanwhile, the connecting pipeline between the original washing pump and the drainage pump is also omitted, so that not only can the parts be reduced, but also the occurrence probability of adverse problems is reduced, and thus, the cost can be effectively reduced and the occupation of space can be reduced.

Accordingly, in order to precisely control the switching between the above three states, the pump structure of the dishwasher should further include a corresponding control unit (not shown) electrically connected to the first driver 210 and the second driver 310, respectively, and the control unit can issue related commands to control the opening and closing of the first driver 210 and the second driver 310, so as to switch the pump structure of the dishwasher between an intake washing state in which the first driver 210 is not moved and the second driver 310 is moved, a drainage state in which the first driver 210 is moved and the second driver 310 is not moved, and a static state in which the first driver 210 and the second driver 310 are not moved. Here, the control part may be a separate control device installed inside the dishwasher, or may be a certain control function module integrally installed on a main control panel of the dishwasher.

Referring to fig. 1 and 2, in the embodiment, the pump structure of the dishwasher further includes a first connection pipe 410 and a second connection pipe 420, one end of the first connection pipe 410 is communicated with the water inlet pipe 120, the other end is connected with the first driver 210, and the first push rod 220 is sleeved in the lumen of the first connection pipe 410; one end of the second connection pipe 420 is communicated with the water outlet pipe 130, the other end is connected with the second driver 310, and the second push rod 320 is sleeved in the lumen of the second connection pipe 420. It can be understood that the first connection pipe 410 and the second connection pipe 420 are disposed to facilitate the connection between the water inlet pipe 120 and the first driver 210 and the connection between the water outlet pipe 130 and the second driver 310, and also provide a limited movement space for the first push rod 220 and the second push rod 320, thereby ensuring the smooth pushing and retracting of the two push rods.

Further, for facilitating connection, as shown in fig. 2, in this embodiment, the first driving assembly 200 further includes a first fixing seat 230, one end of the first connecting pipe 410, which is far away from the water inlet pipe 120, is provided with a first fixing joint 411, and the first driver 210 is connected to the first fixing seat 230 and is detachably connected to the water inlet pipe 120 through connection between the first fixing seat 230 and the first fixing joint 411. Similarly, the second driving assembly 300 further includes a second fixing seat 330, one end of the second connecting pipe 420, which is away from the water outlet pipe 130, is provided with a second fixing joint 421, and the second driver 310 is connected to the second fixing seat 330 and is detachably connected to the water inlet pipe 120 through the connection between the second fixing seat 330 and the second fixing joint 421. Of course, in other embodiments, other connection methods, such as but not limited to, threaded connection, snap connection, welding, etc., may be used between first connection tube 410 and first driver 210 assembly, and between second connection tube 420 and second driver 310 assembly. However, in this embodiment, the driver can be conveniently and firmly fixed on the corresponding connecting pipe by the switching action of the fixing base. Taking the first fixing base 230 as an example, the first fixing base 230 is a ring with a through hole, one end of the first push rod 220 is connected with the piston of the first driver 210, and the other end of the first push rod extends into the first connecting pipe 410 after passing through the first fixing base 230, corresponding connecting lugs are arranged on the first fixing base 230, the first fixing joint 411 and the first driver 210, then the first driver 210 is fixed on the first fixing base 230 by penetrating the connecting lugs through screws, and the first fixing base 230 is also detachably connected with the first fixing joint 411 by penetrating the two connecting lugs through screws. In addition, in the present embodiment, the water inlet pipe 120, the first connecting pipe 410 and the first fixing joint 411 are preferably integrally formed, and the water outlet pipe 130, the second connecting pipe 420 and the second fixing joint 421 are preferably integrally formed, so as to reduce the manufacturing and assembling cost and improve the connection strength between the three parts.

Further, referring to fig. 2 to 5, in the present embodiment, the first driving assembly 200 further includes a first sealing sleeve 240 disposed on the first push rod 220, and an outer circumferential surface of the first sealing sleeve 240 is attached to an inner wall of the first connecting pipe 410; the second driving assembly 300 further includes a second sealing sleeve 340 sleeved on the second push rod 320, and an outer circumferential surface of the second sealing sleeve 340 is attached to an inner wall of the second connecting pipe 420. Both sealing sleeves are preferably made of silica gel with high temperature resistance and good corrosion resistance, and of course, other elastic materials can also be adopted. The two sealing sleeves mainly play a role in sealing a gap between the push rod and the inner tube arm of the connecting tube, and in addition, have a function of protecting the push rod. In other words, when the push rod moves, the corresponding sealing sleeve also moves, but the outer peripheral surface of the sealing sleeve rubs against the inner wall of the pipe of the connecting pipe, so that water can be effectively prevented from flowing into the corresponding driver from the pipe wall gap.

Further, in this embodiment, the first sealing sleeve 240 includes a first sleeve 241 and a first sleeve head 242 that are connected to each other, the first sleeve 241 is configured to receive the first push rod 220, the first sleeve head 242 is disposed at an end of the first sleeve 241 facing the first actuator 210 and is designed to be open towards the first fixing base 230, an open edge of the first sleeve 242 radially extends outward to form a first sealing skirt 243, the first sealing skirt 243 is clamped between the first fixing base 230 and the first fixing connector, a lower end of the first sleeve 241, which is away from the first actuator 210, is provided with an arc-shaped sealing surface 244 that is adapted to a shape of an inner wall of the water inlet pipe 120, and the second sealing sleeve 340 is structurally identical to the first sealing sleeve 240.

Further, as shown in fig. 2, in the present embodiment, a plurality of annular grooves 221 are provided on the outer circumferential surface of the first push rod 220 and/or the outer circumferential surface of the second push rod 320, and the plurality of annular grooves 221 are arranged at intervals along the axial direction. It can be understood that in the actual production process, can pour silica gel into the mould that has placed the push rod when moulding plastics, the shaping back, through the block effect of a plurality of annular groove 221 departments, and just can be connected more firmly and be difficult for droing between seal cover and the push rod.

Referring to fig. 1, in the present embodiment, the main body 110 is cylindrical, the water inlet pipe 120 and the water outlet pipe 130 are both disposed on the outer circumferential surface of the main body 110, the axis of the water inlet pipe 120 is perpendicular to the axis of the water outlet pipe 130, the axis of the first connection pipe 410 is parallel to the axis of the water outlet pipe 130 but perpendicular to the axis of the water inlet pipe 120, and the axis of the second connection pipe 420 is parallel to the axis of the water inlet pipe 120 but perpendicular to the axis of the water outlet pipe 130. However, the design is not limited thereto, and in other embodiments, the water inlet pipe 120, the water outlet pipe 130, the first connecting pipe 410 and the second connecting pipe 420 may be arranged at other positions, but in this embodiment, the arrangement of the positions is not only beneficial to the convenience of installation with other parts of the dishwasher, but also has a more compact structure, thereby achieving the purpose of reducing the volume and saving the space.

Referring to fig. 1 and 2, in the present embodiment, the pump structure of the dishwasher further includes a brushless dc motor assembly 500, and the brushless dc motor assembly 500 is mounted on the main body 110 of the pump body 100. Specifically, the brushless dc motor assembly 500 includes a brushless dc motor 510 and a sealing connection plate 520 connected to the brushless dc motor 510, a rotating wheel 530 connected to a rotating shaft of the brushless dc motor 510 is disposed on the sealing connection plate 520, the sealing connection plate 520 is hermetically connected to the main body 110, and the rotating wheel 530 is disposed in the inner cavity 111 of the main body 110. In practical use, the brushless dc motor 510 drives the rotating wheel 530 to rotate, so as to pump the water in the inner cavity 111 of the main body 110 into the water inlet pipe 120 or the water outlet pipe 130. Of course, in other embodiments, other types of motors may be used, but in this embodiment, the brushless dc motor 510 is preferred because of its advantages of high efficiency, good controllability, durability, and low electrical noise. The performances of the brushless direct current motor assembly 500 such as rotating speed, torque and the like are positively correlated with the water inflow, the water inflow can be determined according to the requirements of the capacity, noise and the like of a dishwasher carrier, and for a small dishwasher, because the requirement on the water injection quantity is not high, the torque of the motor can be reduced, so that the working noise is reduced; on the contrary, for a large-scale dishwasher, the torque of the motor can be properly increased, so that higher water injection quantity is obtained, and a good cleaning effect is ensured.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A dishwasher pump structure, comprising:

the second driving assembly is connected with the water outlet pipe and comprises a second driver and a second push rod connected with the second driver, and the second push rod is driven by the second driver to movably enter and exit the water outlet pipe;

the dishwasher pump structure has a water inlet washing state and a water discharge state; in the water inlet washing state, the first push rod exits from the water inlet pipe, the water inlet pipe is opened, and the second push rod enters the water outlet pipe and blocks the channel of the water outlet pipe; in the drainage state, the first push rod enters the water inlet pipe and blocks the channel of the water inlet pipe, the second push rod exits the water outlet pipe, and the water outlet pipe is opened.

2. The pump structure of a dishwasher of claim 1 further comprising a first connecting tube and a second connecting tube, wherein one end of the first connecting tube is communicated with the water inlet tube, the other end is connected with the first driver, and the first push rod is sleeved in a tube cavity of the first connecting tube; one end of the second connecting pipe is communicated with the water outlet pipe, the other end of the second connecting pipe is connected with the second driver, and the second push rod is sleeved in a pipe cavity of the second connecting pipe.

3. The pump structure of a dishwasher according to claim 2, wherein the first driving assembly further comprises a first fixed seat, one end of the first connecting pipe, which is away from the water inlet pipe, is provided with a first fixed joint, and the first driver is connected with the first fixed seat and is detachably connected with the water inlet pipe through the connection of the first fixed seat and the first fixed joint;

4. The pump structure of a dishwasher of claim 3 wherein the first drive assembly further comprises a first gland fitted over the first push rod, and wherein the outer circumferential surface of the first gland is fitted to the inner wall of the first connecting pipe;

5. The pump structure of a dishwasher according to claim 4, wherein the first seal sleeve comprises a first sleeve and a first sleeve head connected to each other, the first sleeve is used for accommodating the first push rod, the first sleeve head is arranged at one end of the first sleeve facing the first driver and is designed to face the opening of the first fixing seat, the opening edge of the first sleeve head extends radially outwards to form a first seal skirt, the first seal skirt is clamped between the first fixing seat and the first fixed connector, and an arc-shaped seal surface adapted to the shape of the inner wall of the water inlet pipe is arranged at the lower end of the first sleeve pipe away from the first driver.

6. The pump structure of a dishwasher of claim 4 wherein a plurality of annular grooves are provided on the outer circumferential surface of the first pushrod and/or the outer circumferential surface of the second pushrod, and the plurality of annular grooves are arranged at intervals in the axial direction.

7. The pump structure of a dishwasher according to claim 2, wherein the main body is cylindrical, the water inlet pipe and the water outlet pipe are both disposed on the outer circumferential surface of the main body, and the axis of the water inlet pipe is perpendicular to the axis of the water outlet pipe, the axis of the first connecting pipe is parallel to the axis of the water outlet pipe but perpendicular to the axis of the water inlet pipe, and the axis of the second connecting pipe is parallel to the axis of the water inlet pipe but perpendicular to the axis of the water outlet pipe.

8. A dishwasher pump structure according to any one of claims 1 to 7, further comprising a brushless DC motor assembly mounted on the body of the pump body.

9. The pump structure of a dishwasher of claim 8 wherein the brushless dc motor assembly comprises a brushless dc motor and a sealing web connected to the brushless dc motor, the sealing web having a rotor connected to a shaft of the brushless dc motor, the sealing web being sealingly connected to the body, the rotor being disposed within the interior of the body.

10. A dishwasher comprising a washing system, a drain and a dishwasher pump structure as claimed in any one of claims 1 to 9, the inlet pipe of the dishwasher pump structure being in communication with the washing system and the outlet pipe being in communication with the drain.