A washing drain pump body structure and cleaning device

Abstract

This utility model relates to a water pump structure, specifically a washing and drainage pump body structure and cleaning device, including a pump body and a water pump motor. The pump body has a pump casing cavity, with a third cavity opening for washing and wastewater discharge. A shut-off valve structure for water flow control is provided between the pump casing cavity and the third cavity opening. The shut-off valve structure has a normally closed state and an open state. In the normally closed state, the shut-off valve structure blocks water flow; in the open state, it restores water flow. This utility model integrates washing and drainage functions within the same pump body structure. Washing water inlet, washing water outlet, and washing wastewater discharge are all concentrated within the pump casing cavity. Compared to existing integrated water pump structures, this utility model adds a shut-off valve structure to control the wastewater discharge path, achieving backflow prevention without the need for external components. This solves the problems of internal water overflow waste and dilution, improving the efficiency of the cleaning device.

Description

Technical Field

[0001] This utility model relates to a water pump structure, specifically a washing and drainage pump body structure and a cleaning device. Background Technology

[0002] There are many types of cleaning devices on the market, which can clean items such as dishes, cups and spoons, utensils, and baby products. These cleaning devices all require a washing water pump to provide washing water and a corresponding drainage structure. Traditional cleaning devices mostly use separate washing water pumps and corresponding drainage structures. However, with the development of technology, in order to further integrate functions and reduce the size of the device, a water pump structure that integrates washing and drainage has gradually emerged. The prior art CN219432060U discloses a washing pump, specifically a water pump structure that integrates washing and drainage functions into one unit. However, in actual use, in order to prevent backflow of sewage water, a one-way valve or a breather valve needs to be installed at the sewage outlet to prevent backflow of sewage water from affecting the normal washing effect. However, the breather valve is too large and has a high configuration cost, while the one-way valve can only prevent external backflow but cannot prevent internal overflow, resulting in waste and dilution of internal washing water, which is not conducive to the efficiency of use. Utility Model Content

[0003] To address the aforementioned problems of existing water pump structures, such as the need for external components leading to large size and high cost, the inability to prevent internal overflow while only preventing external backflow, and the waste and dilution of internal water, the technical solution adopted by this utility model is as follows: A washing drainage pump body structure includes a pump body and a water pump motor. The pump body has a pump casing cavity. A first cavity of the pump casing cavity is used to install the water pump motor. The water pump motor's water delivery impeller extends through the first cavity into the pump casing cavity. A functional cavity of the pump casing cavity is used for washing water outlet or washing return. A third cavity of the pump casing cavity is used for washing sewage discharge. A shut-off valve structure for water circuit switching is provided between the pump casing cavity and the third cavity. The shut-off valve structure has a normally closed state and an open state. In the normally closed state, the on / off valve structure does not connect the water passage between the pump casing cavity and the third cavity port; When the on / off valve is in the open state, it connects the water passage between the pump casing cavity and the third cavity.

[0004] As described above, a washing drain pump body structure includes a valve control channel for installing the on / off valve structure between the pump casing inner cavity and the third cavity. The first channel port of the valve control channel connects the water passage between the pump casing inner cavity and the third cavity when the on / off valve structure is open.

[0005] As described above, the washing drain pump body structure includes a telescopic rod for implementing water circuit opening and closing and an intermittent motion mechanism, wherein the intermittent motion mechanism can drive the telescopic rod to perform intermittent reciprocating telescopic movement along the valve control channel; In the normally closed state, the extended end of the telescopic rod abuts against the first channel opening to block the water passage between the pump casing cavity and the third cavity opening. When the on / off valve structure is in the open state, the extended end of the telescopic rod leaves the first channel opening to connect the water passage between the pump casing cavity and the third cavity opening.

[0006] As described above, in a washing drain pump body structure, the telescopic rod is installed at the second channel port of the valve control channel, the third channel port of the valve control channel is connected to the third cavity port, the protruding end is located at the end of the telescopic rod near the inner cavity of the pump casing, and the protruding end has a water passage plug; The water passage plug elastically abuts against the inner surface of the valve control channel to form a waterproof seal. When the telescopic rod moves, it drives the water passage plug to move along the inner surface of the valve control channel.

[0007] As described above, in a washing drain pump body structure, the intermittent motion mechanism includes a drive gear for driving the telescopic rod, a valve body motor for driving the drive gear, and a circuit board electrically connected to the valve body motor. The drive gear has a single-segment gear tooth structure arranged circumferentially along the outer periphery, and the driven end of the telescopic rod has a driven tooth structure for engaging the single-segment gear tooth. A reset elastic element is provided between the waterway plug and the second channel opening.

[0008] In the washing drain pump body structure described above, the water passage plug blocks the water passage between the valve control channel and the third cavity port in the normally closed state of the on / off valve structure, and the travel of the telescopic rod is greater than the distance between the first channel port and the third channel port.

[0009] As described above, in a washing drain pump body structure, the functional ports include a fourth port for washing water outlet and a fifth port for washing water inlet return, wherein the fifth port is connected to the first channel port via the inner cavity of the pump casing.

[0010] As described above, in a washing drain pump body structure, a return channel is provided between the fifth cavity and the inner cavity of the pump casing. The valve control channel extends into a pipe wall structure in a second direction b toward the inner cavity of the pump body. The fourth cavity extends into a pipe wall structure in a third direction c toward the inner cavity of the pump body. The return channel extends into a pipe wall structure in a fourth direction d toward the inner cavity of the pump body.

[0011] As described above, in a washing drain pump body structure, the pipe wall structure adopts a rectangular or circular cross section, the first direction a is opposite to the second direction b, the third direction c is perpendicular to the first direction a, the fourth direction d is perpendicular to the first direction a, the second direction b, or the third direction c, and the opening of the fifth cavity is located on the side of the return channel facing the third direction c.

[0012] A cleaning device includes the aforementioned washing drain pump body structure.

[0013] The beneficial effects of this utility model are as follows: This invention integrates washing and drainage functions within the same pump body structure. Washing water inlet, washing water outlet, and washing wastewater discharge are all concentrated within the pump casing cavity. Compared to existing integrated water pump structures, this invention also adds an on / off valve structure to control the flow of wastewater. During washing, the on / off valve structure is normally closed, allowing for normal use of washing water and secondary backflow spraying, preventing overflow or dilution from the wastewater discharge path. During wastewater discharge, the on / off valve structure is open, connecting the pump casing cavity to the wastewater discharge path at the third chamber opening, allowing wastewater to be discharged from the third chamber opening. After discharge, the on / off valve structure returns to its normally closed state, preventing backflow of wastewater. This achieves the effect of preventing backflow without the need for external components, solving the problems of internal water overflow waste and dilution, and improving the efficiency of the cleaning device. Attached Figure Description

[0014] Figure 1 This is a perspective view of a washing and drainage pump body structure and a cleaning device according to the present invention.

[0015] Figure 2 This is a three-dimensional enlarged view of the structure of a washing and drain pump body according to the present invention.

[0016] Figure 3 This is a three-dimensional sectional view along direction b of the structure of a washing and drainage pump body according to this utility model.

[0017] Figure 4 This is a three-dimensional sectional view along the d direction of a washing and drainage pump body structure according to the present invention.

[0018] Figure 5 This is an internal sectional view of the structure of a washing and drain pump body according to the present invention.

[0019] Figure 6 This is a perspective view of a cleaning device according to the present invention. Detailed Implementation

[0020] The embodiments of the technical solution of this application will be described in detail below with reference to the accompanying drawings. The described embodiments are only some embodiments of the technical solution of this application, and not all embodiments. Based on the embodiments of the technical solution of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the technical solution of this application.

[0021] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the technical solution of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0022] Furthermore, the descriptions involving "first," "second," etc., in the technical solutions of this application are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0023] Example 1 Figures 1 to 5This embodiment provides a washing drainage pump structure, including a pump body 1 and a water pump motor 2. The pump body 1 has a pump housing cavity 10. A first cavity 11 of the pump housing cavity 10 is used to install the water pump motor 2. The water delivery impeller 21 of the water pump motor 2 extends into the pump housing cavity 10 through the first cavity 11. A fifth cavity 15 of the pump housing cavity 10 is used for washing water inlet. Functional cavities of the pump housing cavity 10 are used for washing water outlet or washing return. A third cavity 13 of the pump housing cavity 10 is used for washing wastewater discharge. A shut-off valve structure 3 for water circuit switching is provided between the pump housing cavity 10 and the third cavity 13. The washing drainage pump structure can be installed inside a cleaning device and connected to an inlet pipe and a drain pipe. The spray nozzle 41 for washing and / or the wastewater outlet 42 for drainage of the cleaning device 4 are respectively set at the positions of the corresponding functional cavities. The pump body 1 is the pump housing component of the washing drainage pump structure. 0 is a hollow structure with several cavities connecting to the outside. The first cavity 11 has an assembly structure adapted to the water pump motor 2 for installing the water pump motor 2. The assembly structure can be selected by sealing thread connection or bolt locking seal ring, etc. The water delivery impeller 21 passes through the first cavity 11 and extends into the inner cavity 10 of the pump casing for guiding the internal water flow. The water delivery impeller 21 is limited and installed at the output end of the water pump motor 2 to rotate synchronously. The functional cavities can adopt a single-port inlet and outlet or a double-port inlet and outlet method to implement washing water output or washing return. In this embodiment, the functional cavities adopt a single-port structure to take into account both water inlet and outlet. The third cavity 13 serves as the sewage outlet of the inner cavity 10 of the pump casing for washing sewage discharge. The on-off valve structure 3 is located between the inner cavity 10 of the pump casing and the third cavity 13 and plays the role of water circuit on-off control. The on-off valve structure 3 has a normally closed state and an open state. By switching different states, the water circuit blocking and water circuit connection effects can be achieved.

[0024] In use, the water inlet pipe of the cleaning device 4 is connected to the washing water supply from the cleaning chamber 44 of the cleaning device 4. The water flows into the pump casing cavity 10 through the fifth cavity port 15. At this time, the on-off valve structure 3 is in the normally closed state, which blocks the water passage between the pump casing cavity 10 and the third cavity port 13. The washing water accumulates in the pump casing cavity 10 and gradually rises in water level until the water volume is full. The water pump motor 2 rotates the water delivery impeller 21 to pressurize the washing water and output it towards the functional cavity port to the spray nozzle 41 of the cleaning device 4 to perform washing water spraying. After the items on the cleaning device 4 are rinsed, wastewater is formed to be discharged. This wastewater is discharged through the wastewater outlet 42 of the cleaning device 4. The wastewater flows back to the functional cavity and into the pump housing cavity 10. At this time, water flows into the inlet pipe of the fifth cavity 15 or the water supply stops, preventing the wastewater from being discharged from the fifth cavity 15. The on-off valve structure 3 is switched to the open state, so that the water path between the pump housing cavity 10 and the third cavity 13 is connected. The wastewater is discharged through the third cavity 13 to the drain pipe of the cleaning device 4 and then discharged to the outside. Then the on-off valve structure 3 returns to the normally closed state to block the wastewater backflow. Alternatively, the inlet pipe of the cleaning device 4 continues to supply water to clean the remaining wastewater in the pump housing cavity 10. After that, the on-off valve structure 3 returns to the normally closed state to block the wastewater backflow, completing the washing and sewage discharge process.

[0025] This embodiment integrates washing and drainage functions within the same pump body structure. Washing water inlet, washing water outlet, and washing wastewater discharge are all concentrated in the pump casing cavity 10 of the pump body 1. Compared with the existing integrated water pump structure, this utility model also adds an on / off valve structure 3 to realize the opening and closing of the wastewater discharge path. During washing, the on / off valve structure 3 is in a normally closed state, allowing the washing water to be used normally and for secondary backflow spraying, without overflowing or diluting from the wastewater discharge path. During wastewater discharge, the on / off valve structure is in an open state, connecting the wastewater discharge path of the pump casing cavity 10 and the third cavity port 13, allowing wastewater to be discharged from the third cavity port 13. After discharge, the on / off valve structure 3 returns to a normally closed state to prevent wastewater backflow. The effect of preventing backflow can be achieved without the need for external components, solving the problem of internal water overflow waste and dilution, and improving the efficiency of the cleaning device product.

[0026] Furthermore, in some embodiments, a valve control channel 16 for installing the on / off valve structure 3 is included between the pump housing cavity 10 and the third cavity 13. The valve control channel 16 serves as a channel structure for accommodating and installing the on / off valve structure 3 in the pump housing cavity 10 and connects between the pump housing cavity 10 and the third cavity 13. The first channel port 161 of the valve control channel 16 connects the water passage between the pump housing cavity 10 and the third cavity 13 when the on / off valve structure 3 is open. Installing the on / off valve structure 3 into the valve control channel 16 can further improve the water leakage sealing during the on / off process.

[0027] Furthermore, in some embodiments, the on / off valve structure 3 includes a telescopic rod 31 for implementing water flow switching and an intermittent motion mechanism 32. The intermittent motion mechanism 32 can drive the telescopic rod 31 to move intermittently and reciprocally along the valve control channel 16. In the normally closed state, the extended end of the telescopic rod 31 abuts against the first channel opening 161 to block the water flow between the pump housing cavity 10 and the third cavity opening 13, thereby preventing the loss of internal washing water and the backflow of external sewage. When the on / off valve structure 3 is in the open state, the extended end of the telescopic rod 31 leaves the first channel port 161 to connect the water passage between the pump housing cavity 10 and the third cavity port 13. The sewage formed after internal washing can be discharged from the third cavity port 13. The intermittent motion mechanism 32 can drive the telescopic rod 31 to extend and retract through intermittent motion. When the water level in the pump housing cavity 10 drops to a low level, the extended end of the telescopic rod 31 abuts against the first channel port 161 to block the sewage backflow. When the water level in the pump housing cavity 10 rises to a high level, the extended end of the telescopic rod 31 leaves the first channel port 161 to allow the internal sewage to be discharged naturally and to use the high internal water level to push against the low external water level to prevent sewage backflow.

[0028] Furthermore, in some embodiments, the telescopic rod 31 is installed at the second channel port 162 of the valve control channel 16, and the third channel port 163 of the valve control channel 16 is connected to the third cavity port 13. The protruding end is located at the end of the telescopic rod 31 near the inner cavity 10 of the pump housing. The protruding end has a water passage plug 33. The water passage plug 33 serves as a component for blocking the water passage connection of the telescopic rod 31. The water passage plug 33 is installed on the telescopic rod 31 and elastically abuts against the inner surface of the valve control channel 16 to form a sealing effect that prevents water leakage or water backflow. When the telescopic rod 31 moves, it drives the water passage plug 33 to move along the inner surface of the valve control channel 16.

[0029] Further, in some embodiments, the intermittent motion mechanism 32 includes a drive gear 321 for driving the telescopic rod 31, a valve body motor for driving the drive gear 321, and a circuit board 322 electrically connected to the valve body motor. The drive gear 321 has single-segment teeth 3211 arranged circumferentially along its outer periphery. The driven end of the telescopic rod 31 has a driven tooth structure 311 for engaging the single-segment teeth 3211. A reset elastic element 34 is provided between the water passage plug 33 and the second channel opening 162. The single-segment teeth 3211 are arranged only in an arc-shaped manner at a position less than half the circumferential arc length on the outer periphery of the drive gear 321, forming a blank segment and a toothed segment. When the drive gear 321 rotates, the toothed single-segment teeth 3211 mesh with the driven tooth structure 311 of the telescopic rod 31, causing the extended end of the telescopic rod 31 to move away from the first channel opening 161 to conduct the water passage between the pump housing cavity 10 and the third cavity opening 13. The movement of the telescopic rod 31 causes the water passage plug 33 to move and presses the reset elastic element 34. The drive gear 321 continues to rotate. When the toothed section disengages from the driven tooth structure 311, the blank section does not contact the driven tooth structure 311. This allows the reset elastic element 34 to use the elastic reset force after being pressed to push the water passage plug 33 toward the first channel opening 161 and block it, thereby blocking the water passage between the pump housing cavity 10 and the third cavity opening 13. The circuit board 322 adjusts the speed of the drive gear 321 through the valve body motor to form the blank section and the toothed section rotating alternately to achieve intermittent motion. When the water level in the pump housing cavity 10 drops to a low level, the extended end of the telescopic rod 31 abuts against the first channel opening 161 to block the sewage backflow. When the water level in the pump housing cavity 10 rises to a high level, the extended end of the telescopic rod 31 leaves the first channel opening 161, allowing the internal sewage to drain naturally and using the internal high water level to push against the external low water level to prevent sewage backflow.

[0030] Furthermore, in some embodiments, the water block 33 blocks the water passage between the valve control channel 16 and the third cavity 13 in the normally closed state of the on / off valve structure 3, and the travel of the telescopic rod 31 is greater than the distance between the first channel 161 and the third channel 163.

[0031] Example 2 Figures 1 to 6This embodiment provides a cleaning device with a washing and drain pump body structure. The washing device 4 has a spray nozzle 41 for washing and / or a drain outlet 42 for draining water, which are respectively located at the corresponding functional chamber positions. The functional chambers include a fourth chamber 14 for washing water outlet and a fifth chamber 15 for washing water inlet return. In this embodiment, the functional chambers adopt a dual-port structure to implement water inlet and outlet respectively. The fourth chamber 14 is connected to a second chamber 12 for auxiliary washing water inlet through the pump housing cavity 10, and the fifth chamber 15 is connected to a first channel port 161 through the pump housing cavity 10. The dual-port structure facilitates the washing and draining of the cleaning device to form a water circulation effect. In this embodiment, the washing and drain pump body structure can change the water inlet position from the fifth chamber 15 to the second chamber 12 to optimize the water circuit structure.

[0032] Furthermore, in some embodiments, a return channel 17 is provided between the fifth cavity 15 and the inner cavity 10 of the pump housing. The second cavity 12 extends a pipe wall structure in a first direction a toward the inner cavity of the pump body 1. The valve control channel 16 extends a pipe wall structure in a second direction b toward the inner cavity of the pump body 1. The fourth cavity 14 extends a pipe wall structure in a third direction c toward the inner cavity of the pump body 1. The return channel 17 extends a pipe wall structure in a fourth direction d toward the inner cavity of the pump body 1. The pipe wall structure facilitates the installation and connection of the cleaning device. The cavity structure extends in different directions to adapt to the internal installation requirements of the cleaning device. The return channel 17 facilitates the cleaning device to implement washing and draining diversion to form a water circulation effect.

[0033] Furthermore, in some embodiments, the pipe wall structure adopts a rectangular or circular cross-section, which can be selected according to actual assembly requirements. The first direction a is opposite to the second direction b, such that the water inlet direction of the second cavity 12 faces the drainage direction of the third cavity 13 (see...). Figure 4 The third direction c is perpendicular to the first direction a, so that the water inlet direction of the second chamber 12 is perpendicular to the water outlet direction of the fourth chamber 14. After the water is filled, the water delivery impeller 21 rotates in the direction of the water inlet of the second chamber 12 to improve the water outlet efficiency. The fourth direction d is perpendicular to the first direction a, the second direction b, or the third direction c respectively. The opening of the fifth chamber 15 is located on the side of the return channel 17 facing the third direction c, so that the sewage returning from the fifth chamber 15 enters the pump casing cavity 10 from the side to facilitate sewage return.

[0034] Furthermore, in some embodiments, the second chamber 12 used for auxiliary washing water inlet can be removed from the pump body 1 when auxiliary washing is not required, and the fifth chamber 15 serves as the water inlet position on the pump body 1.

[0035] Example 3 Figures 1 to 6This embodiment provides a cleaning device 4 employing a washing drain pump structure. The cleaning device includes a water tank 43 for storing and supplying water and a cleaning chamber 44 for accommodating items to be cleaned. The washing drain pump structure is located below the cleaning chamber 44 and connects to the cleaning chamber 44 via a fourth port 14 and a fifth port 15. The fourth port 14 is at a higher horizontal position than the fifth port 15. The outer periphery of the cleaning chamber 44 has an inlet port 441 for connecting to the water tank 43, and the water tank 43 has an outlet port 431 for discharging water. Before washing, the washing drain pump body structure of the embodiment connects the water outlet port 431 of the water tank 43 to the water inlet port 441 of the washing chamber 44 and injects water into the washing chamber 44 from the water inlet port 441. The washing water flows into the washing drain pump body structure from the fifth chamber port 15 through the washing chamber 44, and then the water pump motor 2 pressurizes and sprays the washing water out from the fourth chamber port 14. Compared with the previous embodiment, the water inlet position is changed from the second chamber port 12 to the water inlet port 441, which flows into the pump housing cavity 10 through the fifth chamber port 15, reducing the water flow diversion in the pump housing cavity 10 and optimizing the water connection structure.

[0036] The above examples are merely illustrative of the technical content of this utility model to facilitate reader understanding, but do not imply that the implementation of this utility model is limited to these embodiments. Any technical extensions or re-creations made based on this utility model are protected by this utility model. The scope of protection of this utility model is defined by the claims.

Claims

1. A washing drainage pump body structure, comprising a pump body (1) and a water pump motor (2), wherein the pump body (1) has a pump housing cavity (10), a first cavity (11) of the pump housing cavity (10) is used to install the water pump motor (2), the water pump motor (2)'s water delivery impeller (21) extends through the first cavity (11) into the pump housing cavity (10), the functional cavities of the pump housing cavity (10) are used for washing water outlet or washing return, and the third cavity (13) of the pump housing cavity (10) is used for washing sewage discharge, characterized in that: A shut-off valve structure (3) for water circuit switching is provided between the inner cavity (10) of the pump casing and the third cavity (13). The shut-off valve structure (3) has a normally closed state and an open state. In the normally closed state, the water passage between the pump casing cavity (10) and the third cavity (13) is not connected; When the on / off valve structure (3) is in the open state, it connects the water passage between the pump casing inner cavity (10) and the third cavity (13).

2. A washing drain pump body structure as claimed in claim 1, characterized in that: The pump housing cavity (10) and the third cavity (13) include a valve control channel (16) for installing the on / off valve structure (3). The first channel port (161) of the valve control channel (16) connects the water passage between the pump housing cavity (10) and the third cavity (13) when the on / off valve structure (3) is open.

3. The structure of a washing drain pump body as described in claim 2, characterized in that: The on / off valve structure (3) includes a telescopic rod (31) for implementing water circuit opening and closing and an intermittent motion mechanism (32). The intermittent motion mechanism (32) can drive the telescopic rod (31) to intermittently reciprocate and extend along the valve control channel (16). In the normally closed state, the extended end of the telescopic rod (31) of the on / off valve structure (3) abuts against the first channel opening (161) to block the water passage between the pump casing cavity (10) and the third cavity opening (13); When the on / off valve structure (3) is in the open state, the extended end of the telescopic rod (31) leaves the first channel port (161) to connect the water passage between the pump casing cavity (10) and the third cavity port (13).

4. The structure of a washing drain pump body as described in claim 3, characterized in that: The telescopic rod (31) is installed at the second channel port (162) of the valve control channel (16), the third channel port (163) of the valve control channel (16) is connected to the third cavity port (13), the extended end is located at the end of the telescopic rod (31) near the inner cavity (10) of the pump casing, and the extended end has a water passage plug (33). The water block (33) elastically abuts against the inner surface of the valve control channel (16) to form a waterproof seal. When the telescopic rod (31) moves, it drives the water block (33) to move along the inner surface of the valve control channel (16).

5. The structure of a washing drain pump body as described in claim 4, characterized in that: The intermittent motion mechanism (32) includes a drive gear (321) for driving the telescopic rod (31), a valve body motor for driving the drive gear (321), and a circuit board (322) electrically connected to the valve body motor. The drive gear (321) has a single-segment tooth (3211) arranged circumferentially along the outer periphery. The driven end of the telescopic rod (31) has a driven tooth structure (311) for cooperating with the single-segment tooth (3211). A reset elastic element (34) is provided between the waterway plug (33) and the second channel opening (162).

6. The washing drain pump body structure as described in claim 4, characterized in that: The water block (33) blocks the water passage between the valve control channel (16) and the third cavity (13) when the on / off valve structure (3) is normally closed. The travel of the telescopic rod (31) is greater than the distance between the first channel (161) and the third channel (163).

7. A washing drain pump body structure as described in any one of claims 2-6, characterized in that: The functional ports include a fourth port (14) for washing water outlet and a fifth port (15) for washing water inlet return. The fifth port (15) is connected to the first channel port (161) via the pump housing cavity (10).

8. The structure of a washing drain pump body as described in claim 7, characterized in that: The fifth cavity (15) has a return channel (17) between it and the inner cavity of the pump casing (10). The valve control channel (16) extends into a pipe wall structure in the second direction b toward the inner cavity of the pump body (1). The fourth cavity (14) extends into a pipe wall structure in the third direction c toward the inner cavity of the pump body (1). The return channel (17) extends into a pipe wall structure in the fourth direction d toward the inner cavity of the pump body (1).

9. The structure of a washing drain pump body as described in claim 8, characterized in that: The pipe wall structure adopts a rectangular or circular cross section. The first direction a is opposite to the second direction b. The third direction c is perpendicular to the first direction a. The fourth direction d is perpendicular to the first direction a, the second direction b, or the third direction c. The opening of the fifth cavity (15) is located on the side of the return channel (17) facing the third direction c.

10. A cleaning device, characterized in that: Includes the washing drain pump body structure as described in any one of claims 1-9.

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