Piston pump and laundry treatment apparatus

Abstract

The invention discloses a piston pump and a clothes processing device, the piston pump comprises a pump body, a piston and a driving assembly, the pump body is of an integrated structure, and the pump body is provided with a piston cavity; the piston is arranged in the piston cavity in a reciprocating sliding mode in the axial direction of the piston cavity. The driving assembly is connected to the pump body, and part of the driving assembly extends into the piston cavity so as to drive the piston to slide in a reciprocating mode. The pump head is connected to the pump body and provided with a liquid outlet and a liquid inlet which are both communicated with the piston cavity. The pump body is of the integrated structure and is provided with the piston cavity, connecting points can be reduced, and therefore possible leakage points and fault points are reduced, the pump body can bear longer-time use, and the stability and reliability of the whole structure of the piston pump are improved. And one part of the pump body is used as a mounting part of the driving assembly, so that the number of parts of the piston pump is reduced, and the assembly process is simplified.

Description

Technical Field

[0001] This application relates to the field of washing machine technology, and more particularly to a piston pump and a clothes handling device. Background Technology

[0002] With the development of technology and the improvement of people's living standards, smart washing machines have gradually become an essential appliance in modern homes. Smart washing machines typically have an automatic detergent dispensing function. This function uses multi-dimensional sensors to determine the accurate weight of the clothes and the amount of water needed, and then precisely controls the automatic dispensing of detergent through a piston pump.

[0003] Piston pumps are mainly used for pumping and discharging liquids. However, in related technologies, piston pumps have a large number of parts, which increases manufacturing costs. Summary of the Invention

[0004] This application provides a piston pump and a clothing processing device, which aims to improve the problem of the large number of parts in the piston pump.

[0005] In a first aspect, embodiments of this application provide a piston pump, including a pump body, a piston, and a drive assembly. The pump body is an integral structure and has a piston cavity. The piston is slidably disposed in the piston cavity along the axial direction of the piston cavity. The drive assembly is connected to the pump body, and a portion of the drive assembly extends into the piston cavity to drive the piston to slide reciprocally. The pump head is connected to the pump body and has an outlet and an inlet, both of which communicate with the piston cavity.

[0006] In some of these embodiments, along the sliding direction of the piston, the pump body has a first end near the pump head and a second end away from the pump head;

[0007] The piston chamber has a communication port that passes through the first end of the pump body. The piston is assembled in the piston chamber through the communication port. The liquid outlet and the liquid inlet are connected to the piston chamber through the communication port. The drive assembly is located closer to the second end than the first end.

[0008] In some embodiments, the second end is provided with a leakage hole, which communicates with the piston chamber.

[0009] In some embodiments, the drive assembly includes a motor housing and a motor, the motor housing having a motor cavity; the motor is mounted in the motor cavity, and a portion of the motor extends into the piston cavity to drive the piston to reciprocate.

[0010] The inner wall of the motor housing and the outer wall of the motor are fitted with a latch, which engages with the other of the inner wall of the motor housing and the outer wall of the motor, so that the motor is confined within the motor cavity.

[0011] In some embodiments, multiple buckles are provided, and the multiple buckles are arranged circumferentially along the inner wall surface of the motor housing.

[0012] In some embodiments, the inner wall surface of the motor housing has the buckle, the buckle having a first guide surface that slides with the motor, the first guide surface gradually tilting toward the central axis of the motor along the direction in which the motor is inserted into the motor cavity.

[0013] In some embodiments, the latch further has a second guide surface that slides with the motor, the second guide surface gradually tilting toward the central axis of the motor along the direction in which the motor moves out of the motor cavity.

[0014] In some embodiments, the motor housing is provided with a wire-passing hole that connects to the motor cavity and is used to lead out the power cable of the motor from the motor cavity.

[0015] In some embodiments, the pump body includes a pump column housing and a motor base, the pump column housing having the piston chamber; the motor base is connected to the pump column housing, the motor base having a mounting cavity, the bottom wall of the mounting cavity having a through hole communicating with the piston chamber;

[0016] The drive assembly is partially inserted through the mounting cavity and the through hole to connect with the piston.

[0017] In some embodiments, the motor base includes a base body and a mounting plate, the base body being connected to the pump housing; the mounting plate is connected to the base body, has a first fixing hole, and forms the mounting cavity with the base body; wherein, the motor housing has a second fixing hole, and the piston pump further includes a fixing member, the fixing member passing through the first fixing hole and the second fixing hole.

[0018] In some embodiments, the outer wall of the motor housing is provided with a clearance groove, which extends along the axial direction of the motor. The second fixing hole is located on the extension path of the clearance groove, and the clearance groove is used to avoid the fixing member inserted into the second fixing hole.

[0019] In some embodiments, one of the mounting plate and the motor is provided with a limiting protrusion, and the other of the mounting plate and the motor is provided with a limiting hole, and the limiting protrusion is inserted into the limiting hole.

[0020] In some embodiments, the motor housing further has a groove disposed on the cavity wall of the motor cavity and communicating with the motor cavity; the motor is provided with a connecting lug, which is engaged in the groove;

[0021] The connecting ear has the limiting hole, and the mounting plate is provided with the limiting protrusion.

[0022] In some embodiments, at least a portion of the limiting protrusion has a gap with the wall of the limiting hole.

[0023] In some embodiments, the motor housing is provided with a support lug, which is disposed opposite to the connecting lug. The support lug has a second fixing hole, and the connecting lug has a third fixing hole. The third fixing hole and the limiting hole are arranged at intervals. The fixing member is sequentially inserted through the second fixing hole, the third fixing hole, and the first fixing hole.

[0024] In some embodiments, the inner peripheral wall of the motor cavity has a foolproof groove; the mounting plate is provided with a foolproof part adapted to the foolproof groove, the foolproof part being embedded in the foolproof groove.

[0025] In some embodiments, the pump body further includes a support rib connected to the outer peripheral wall of the base body and the outer surface of the mounting plate opposite to the motor.

[0026] In some embodiments, the drive assembly further includes a bushing sleeve fitted onto the motor shaft of the motor and rotatably disposed within the mounting cavity. A drive portion is eccentrically disposed on the side of the bushing opposite to the motor, and the drive portion passes through the through hole and is connected to the piston.

[0027] The bushing has a convex ring on its outer peripheral wall, the diameter of which is larger than the diameter of the through hole, so that the convex ring abuts against the bottom wall of the mounting cavity.

[0028] In some embodiments, the pump head is provided with a first foolproof notch, and the pump body is provided with a second foolproof notch, the first foolproof notch corresponding to the second foolproof notch.

[0029] In some embodiments, the pump head includes a pump cover and a valve plate. The pump cover has an inlet channel communicating with the inlet and an outlet channel communicating with the outlet. The valve plate is located between the pump cover and the pump body and has the inlet and the outlet.

[0030] The valve plate is provided with a first anti-fool notch that penetrates the valve plate along its thickness direction, and the pump cover is provided with a third anti-fool notch that penetrates the pump cover along its thickness direction and corresponds to the first anti-fool notch.

[0031] In some embodiments, the valve plate is a rectangular plate, and the first anti-fooling notch is disposed at one corner of the valve plate.

[0032] In some embodiments, the pump body includes a pump column housing and a motor mount, the pump column housing having the piston chamber and the second foolproof notch; the motor mount is connected to the pump column housing, the motor mount having a mounting cavity, the bottom wall of the mounting cavity having a through hole communicating with the piston chamber; wherein a portion of the drive assembly passes through the mounting cavity and the through hole to connect with the piston.

[0033] In some embodiments, the pump housing includes a housing body, a connecting plate, and a plurality of spaced-apart first connecting portions. The housing body has the piston chamber. The connecting plate is connected to a first end of the housing body and has a second anti-fooling notch. The plurality of spaced-apart first connecting portions are connected to the outer edge of the connecting plate, and the connecting portions have first connecting holes.

[0034] The pump cover is provided with a second connecting part, which is disposed opposite to the first connecting part. The second connecting part has a second connecting hole. The piston pump also includes a connector, which is inserted into the first connecting hole and the second connecting hole to fix the pump cover to the connecting plate.

[0035] In some embodiments, the pump cover has a plurality of connecting grooves, each of which corresponds to a plurality of second connecting portions. The first connecting portion passes through the connecting groove so that the end face of the first connecting portion fits against the end face of the second connecting portion.

[0036] In some embodiments, the outer edge of the valve plate has multiple limiting notches, which are matched with a portion of the outer peripheral wall of the first connecting portion.

[0037] In some embodiments, the pump cover has a receiving groove on the side facing the connecting plate, and the valve plate is at least partially located within the receiving groove;

[0038] One of the pump cover and the connecting plate is provided with a fastening part, and the other of the pump cover and the connecting plate is provided with a fastening hole, and a portion of the fastening part is fastened into the fastening hole.

[0039] In some embodiments, the connecting plate is provided with the fastening portion, the fastening portion having a first guide slope;

[0040] The pump cover is provided with the fastening hole, which has a second guide slope. During the process of the fastening part being fastened into the fastening hole, the fastening part slides and abuts against the second guide slope through the first guide slope.

[0041] In some embodiments, the connecting plate has a first sealing groove and a communication port, the communication port communicating with the piston chamber, and the first sealing groove being arranged around the periphery of the communication port; wherein, the piston pump further includes a first sealing element embedded in the first sealing groove, the first sealing element being used to seal the connection between the connecting plate and the valve plate.

[0042] In some embodiments, the valve plate has an annular first sealing portion on the side facing the connecting plate, and the first sealing portion presses the first sealing member toward the first sealing groove to press the first sealing member against the bottom wall of the first sealing groove.

[0043] In some embodiments, the connecting plate is provided with a plurality of weight-reducing grooves, which are arranged at intervals along the outer periphery of the first sealing groove.

[0044] In some embodiments, the pump head includes a pump cover and a valve plate, the pump cover being connected to the pump body; the valve plate is located between the pump cover and the pump body, and has an outlet and an inlet both communicating with the piston chamber;

[0045] Wherein, at least one of the valve plate and the pump cover is provided with a foolproof hole, and at least the other of the valve plate and the pump cover is provided with a foolproof protrusion, the foolproof protrusion being engaged with the foolproof hole.

[0046] In some embodiments, the pump cover is provided with a snap-fit ​​hole, and the valve plate includes a plate body and a cantilever hook. The plate body has the liquid inlet and the liquid outlet arranged at intervals. One end of the cantilever hook is connected to the plate body at an angle, and the other end is fastened to the snap-fit ​​hole.

[0047] In some embodiments, the cantilever hook includes a plug-in portion and a hook-holding portion. One end of the plug-in portion is connected to the plate body and extends toward the pump cover, passing through the plug-in hole. The hook-holding portion is connected to the other end of the plug-in portion and hooks with the outer wall surface of the pump cover.

[0048] In some embodiments, two cantilever hooks are provided, and the two cantilever hooks are arranged diagonally.

[0049] Two anti-mistake protrusions are provided, and the two anti-mistake protrusions are arranged diagonally.

[0050] The two cantilever hooks and the two anti-fouling protrusions are located at the four corners of the plate body, respectively.

[0051] In some embodiments, the pump cover is provided with an inlet channel communicating with the inlet port and an outlet channel communicating with the outlet port; the pump cover includes:

[0052] The cover body has an interconnected receiving groove and a second sealing groove. The receiving groove contains the plate body. The outlet of the liquid inlet channel is located on the bottom wall of the receiving groove and communicates with the liquid inlet. The inlet of the liquid outlet channel is located on the bottom wall of the receiving groove and communicates with the liquid outlet. The second sealing groove is arranged around the outlet of the liquid inlet channel and the inlet of the liquid outlet channel.

[0053] The piston pump further includes a second seal, which is embedded in the second sealing groove. The second seal is used to seal the connection between the cover body and the plate body, thereby sealing the connection between the outlet of the liquid inlet channel and the liquid inlet, and sealing the connection between the inlet of the liquid outlet channel and the liquid outlet.

[0054] In some embodiments, the valve plate further includes a second sealing portion connected to the side of the plate body facing the second sealing groove. The second sealing portion presses the second sealing member toward the second sealing groove to press the second sealing member against the bottom wall of the second sealing groove.

[0055] In some embodiments, the second seal includes a first sealing portion and a second sealing portion interconnected as one unit, the first sealing portion being annularly disposed at the inlet of the liquid outlet channel and the second sealing portion being annularly disposed at the outlet of the liquid inlet channel.

[0056] In some embodiments, the piston pump further includes an inlet check valve and an outlet check valve, the inlet check valve being connected to the plate body and used to open and close the inlet; the outlet check valve being connected to the side of the plate body opposite to the inlet check valve and used to open and close the outlet.

[0057] In some embodiments, the valve plate further includes a first stop portion and a second stop portion. The first stop portion is connected to one side of the plate body and is disposed adjacent to the liquid inlet. The second stop portion is connected to the other side of the plate body, is disposed opposite to the first stop portion, and is disposed adjacent to the liquid outlet.

[0058] The first stop is located within the projection of the inlet check valve on the plate body, and the second stop is located within the projection of the outlet check valve on the plate body.

[0059] In some embodiments, the pump head has a first mounting hole, and the pump body has two second mounting holes. Both the first and second mounting holes are used for assembly with a laundry detergent box. The projection of the first mounting hole along the axial direction of the piston cavity falls between the two second mounting holes, and the line connecting the two second mounting holes is set at an angle to the axial direction of the piston cavity.

[0060] In some of these embodiments, the piston chamber passes axially through the first mounting hole.

[0061] In some embodiments, the two second mounting holes are arranged symmetrically along the vertical plane containing the axial direction of the piston cavity.

[0062] In some embodiments, the pump body includes a pump column housing, a motor base, and two mounting seats. The pump column housing has the piston chamber. The motor base is connected to the pump column housing and has a mounting cavity. The bottom wall of the mounting cavity has a through hole communicating with the piston chamber. A portion of the drive assembly passes through the mounting cavity and the through hole to connect with the piston. The two mounting seats are respectively connected to both sides of the pump column housing, located along the axial direction of the piston chamber between the pump head and the motor base. Each mounting seat has at least one second mounting hole.

[0063] In some embodiments, the mounting base further has positioning holes spaced apart from the second mounting holes, the positioning holes being used for pre-positioning with the garment treatment agent box.

[0064] In some embodiments, the pump head includes a pump cover and a valve plate. The pump cover has an inlet channel communicating with the inlet and an outlet channel communicating with the outlet. The valve plate is located between the pump cover and the pump body and has the inlet and the outlet.

[0065] The first assembly hole is provided in the pump cover and is located between the liquid inlet channel and the liquid outlet channel.

[0066] In some embodiments, the pump cover includes a cover body, an inlet pump nozzle and an outlet pump nozzle, and a connecting plate. The cover body has a receiving groove for accommodating the valve plate. The inlet pump nozzle and the outlet pump nozzle are both connected to the side of the cover body opposite to the receiving groove. The inlet pump nozzle has the inlet channel, and the outlet pump nozzle has the outlet channel. A bridging plate is connected to the inlet pump nozzle and the outlet pump nozzle and is located between the inlet pump nozzle and the outlet pump nozzle. The bridging plate has the first mounting hole.

[0067] In some embodiments, the bridging plate includes a first plate and a second plate, the first plate being connected to the cover body and extending in a direction away from the receiving groove; the second plate is stacked on top of the first plate.

[0068] The first assembly hole penetrates through the first plate and the second plate.

[0069] In some embodiments, the cover body, the inlet pump nozzle and the outlet pump nozzle, and the bridging plate are integrally formed.

[0070] In some embodiments, the piston chamber has a communication port extending through one end of the pump body, and the piston has an assembly part on the side facing the communication port. The assembly part is used to cooperate with an external assembly tool so that the piston is installed in the piston chamber.

[0071] In some embodiments, the assembly is one of an internal hexagonal slot, a slotted slot, or a Phillips head slot.

[0072] In some embodiments, the piston includes a guide body, a plug body, and a reinforcing rib. The guide body slides in conjunction with the inner wall of the piston cavity. The plug body is connected to the end of the guide body, has the mounting portion, and the cross-sectional area of ​​the plug body is larger than the cross-sectional area of ​​the guide body. The reinforcing rib is connected to the guide body and the plug body.

[0073] In some embodiments, the outer peripheral wall of the plug body is provided with a third sealing groove, and the piston pump further includes a third sealing element embedded in the third sealing groove, the third sealing element being used to seal the inner wall of the plug body and the piston chamber.

[0074] In some embodiments, the guide body is provided with a first guide portion, and the inner wall of the piston cavity is provided with an axially extending first guide rail, the first guide portion being slidably disposed in the first guide rail.

[0075] In some embodiments, the assembly part is a slot, the length direction of the slot is perpendicular to the extension direction of the first guide part, and the central axis of the first guide part is located in the vertical plane containing the axial direction of the piston cavity.

[0076] In some embodiments, the inner wall of the piston chamber is further provided with a second guide rail and a third guide rail arranged opposite to each other, and the second guide rail and the third guide rail are both extended along the axial direction of the piston chamber;

[0077] The guide body is further provided with a second guide portion and a third guide portion, which are located on both sides of the guide body, and are slidably connected to the second guide rail and the third guide rail, respectively.

[0078] In some embodiments, the guide body is provided with two oil storage grooves. Along the axial direction of the piston cavity, the two oil storage grooves are respectively arranged adjacent to the second guide portion and the third guide portion, and the oil storage grooves are used to collect the lubricating medium in the piston cavity.

[0079] Secondly, embodiments of this application provide a clothing treatment device, including a main body, a clothing treatment agent box, and a piston pump as described above. The main body includes a housing and a cylinder assembly disposed within the housing. The clothing treatment agent box has a liquid storage chamber disposed on the housing. The piston pump is connected to the clothing treatment agent box, the liquid inlet is connected to the liquid storage chamber, and the liquid outlet is connected to the cylinder assembly.

[0080] In known related technologies, in order to install the piston into the piston chamber, the pump body is generally set up in a split manner, with an additional cover to form the piston chamber together with other parts. In addition, related technologies also include an end cover for assembling the drive assembly so that the drive assembly can be connected to a preset position.

[0081] The pump body in this embodiment is an integral structure with a piston chamber, which reduces connection points, thereby reducing possible leakage points and failure points, enabling it to withstand longer use and improving the overall stability and reliability of the piston pump.

[0082] The drive assembly is connected to the pump body, and a portion of the drive assembly extends into the piston chamber to drive the piston to reciprocate, ensuring smooth reciprocating motion. By using a portion of the pump body as the mounting component for the drive assembly, the number of parts in the piston pump is reduced, simplifying the assembly process. This reduction in parts also lowers manufacturing costs, including not only material costs but also reduced processing and assembly costs. Attached Figure Description

[0083] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0084] Figure 1 This is a schematic diagram of the structure of a piston pump provided in one embodiment of this application;

[0085] Figure 2 for Figure 1 A partially exploded structural diagram of a piston pump;

[0086] Figure 3 for Figure 1 A schematic diagram of the exploded structure of a piston pump;

[0087] Figure 4 An exploded view of a piston pump provided in an embodiment of this application (pump head omitted);

[0088] Figure 5 An exploded view of a piston pump provided for another embodiment of this application (pump head omitted);

[0089] Figure 6 This is a schematic diagram of the structure of a motor housing provided in one embodiment of this application;

[0090] Figure 7 This is a schematic diagram of the pump body provided in one embodiment of this application;

[0091] Figure 8 This is a schematic diagram of the pump body from another angle according to an embodiment of this application;

[0092] Figure 9 An exploded view of a piston pump provided in an embodiment of this application (driving components omitted);

[0093] Figure 10 An exploded view of a piston pump provided in an embodiment of this application (pump body omitted);

[0094] Figure 11 This is a schematic diagram of the valve plate provided in one embodiment of this application;

[0095] Figure 12 This is a schematic diagram of the structure of a pump cover provided in one embodiment of this application;

[0096] Figure 13 This is a schematic diagram of the pump cover from another angle according to an embodiment of this application;

[0097] Figure 14 This is an exploded view of the piston and pump body provided in one embodiment of this application;

[0098] Figure 15 This is an exploded structural diagram of the piston and third seal provided in one embodiment of this application.

[0099] Explanation of reference numerals in the attached figures:

[0100] 100. Piston pump; 10. Pump body; 10a. Piston chamber; 10b. Leakage hole; 10c. Second anti-foolproof notch; 11. Pump column housing; 111. Housing body; 1111. First guide rail; 1112. Second guide rail; 1113. Third guide rail; 112. Connecting plate; 112a. Communicating port; 112b. First sealing groove; 112c. Weight reduction groove; 1121. Fastening part; 1121a. First guide slope; 113. First connecting part; 113a. First connecting hole; 12. Motor base; 12a. Mounting cavity; 12b. Through hole; 121. Base body; 122. Mounting plate; 122a. First fixing hole; 1221. Limiting protrusion 1222, Anti-foolproof part; 20, Piston; 20a, Drive groove; 21, Guide body; 21a, Oil reservoir; 211, First guide part; 212, Second guide part; 213, Third guide part; 22, Plug body; 22a, Third sealing groove; 221, Assembly part; 23, Reinforcing rib; 13, Support rib; 14, Assembly base; 14a, Second assembly hole; 14b, Positioning hole; 30, Drive assembly; 31, Motor housing; 31a, Motor cavity; 31b, Wiring hole; 31c, Clearance groove; 31d, Groove; 31e, Anti-foolproof groove; 311, Support ear; 311a, Second fixing hole; 32, Motor; 321, Connecting ear; 32 1a. Limiting hole; 321b. Third fixing hole; 33. Snap fastener; 331. First guide surface; 332. Second guide surface; 34. Bushing; 341. Drive unit; 342. Protruding ring; 40. Pump head; 41. Pump cover; 41a. Liquid inlet channel; 41b. Liquid outlet channel; 41c. Third anti-foolproof notch; 41d. Connecting groove; 41e. Receiving groove; 41f. Anti-foolproof hole; 41g. Snap-fit ​​hole; 41h. Snap-fit ​​hole; 41h1. Second guide slope; 411. Cover body; 411a. Second sealing groove; 412. Second connecting part; 412a. Second connecting hole; 413. Liquid inlet pump nozzle; 414. Liquid outlet pump nozzle; 415. Bridging plate ; 415a, First assembly hole; 416, Reinforcing seat; 42, Valve plate; 42a, Liquid inlet; 42b, Liquid outlet; 42c, First anti-foolproof notch; 42d, Limiting notch; 421, Plate body; 422, First sealing part; 423, Anti-foolproof protrusion; 424, Cantilever hook; 4241, Insertion part; 4242, Hook part; 425, Second sealing part; 426, First stop part; 427, Second stop part; 50, Fixing member; 60, Connecting member; 70, First sealing member; 80, Second sealing member; 81, First sealing part; 82, Second sealing part; 90, Third sealing member; 91, Liquid inlet check valve; 92, Liquid outlet check valve. Detailed Implementation

[0101] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0102] This application relates to a clothing processing device. Currently, there are many types of clothing processing devices. Functionally, clothing processing devices typically include washing machines, dryers, spin dryers, etc. Among them, washing machines are used for automatically washing clothes. Washing machines are generally divided into drum washing machines and top-loading washing machines. Drum washing machines and fully automatic top-loading washing machines are usually equipped with an automatic detergent dispensing system for adding detergent into the drum assembly, so that various detergents such as externally added laundry detergent and fabric softener are flushed into the drum assembly through the inlet water to achieve cleaning and washing of clothes.

[0103] The following description uses a washing machine as an example to illustrate this embodiment; other clothing processing devices can be considered similarly.

[0104] Please see Figure 1 , Figure 2 and Figure 3 The garment processing device includes a main body, a garment processing agent cartridge, and a piston pump 100. The main body includes a housing and a drum assembly housed within the housing. The housing is the external structure of the garment processing device, protecting the internal structure from external environmental influences. The drum assembly provides a space where the user can place garments for washing, where the garments are washed and rinsed by rotation and water flow. The garment processing agent cartridge is located on the housing and has a liquid storage chamber for storing garment processing agents, such as detergent, fabric softener, and bleach. The liquid storage chamber can be divided into multiple compartments, each for storing a different garment processing agent. The piston pump 100 is a component used to precisely control the dispensing of laundry detergent, reducing waste and inaccuracies when manually dispensing. The piston pump 100 is connected to the laundry detergent dispenser and has an inlet 42a and an outlet 42b. The inlet 42a is unidirectionally connected to the storage chamber, and the outlet 42b is unidirectionally connected to the drum assembly. The piston pump 100 can draw laundry detergent from the storage chamber and deliver it to the drum assembly, ensuring that the laundry detergent can only flow in one direction and not in the opposite direction, thus preventing the laundry detergent from flowing back into the storage chamber during the washing machine's operation and affecting the washing effect.

[0105] Users need to add laundry detergent to the detergent dispenser, and the piston pump 100 can automatically complete the dispensing process, eliminating the need for manual addition every time, thus improving convenience. Furthermore, through the precise control of the piston pump 100, the laundry detergent can be released into the drum assembly at the appropriate time during the washing process, improving washing performance.

[0106] Please continue reading. Figure 2 and Figure 3 This application provides a piston pump 100 for use in a garment processing device. The piston pump 100 includes a pump body 10, a piston 20, a drive assembly 30, and a pump head 40. The pump body 10 is the outer shell of the piston chamber 10a and has the piston 20 disposed within the piston chamber 10a. That is, the pump body 10 provides space for the movement of the piston 20. The pump body 10 can be a stainless steel pump body, a cast iron pump body, or an alloy steel pump body, which has certain corrosion resistance and is suitable for carrying garment processing agents, thereby improving the durability of the pump body 10.

[0107] The piston 20 is slidably disposed in the piston chamber 10a along the axial direction of the piston chamber 10a. Understandably, a pump chamber is formed between the end of the piston 20 and the pump head 40. The piston 20 can change the volume of the pump chamber during reciprocating sliding to achieve the intake or discharge of the clothing treatment agent.

[0108] The pump head 40 is connected to the pump body 10, and the pump head 40 has an outlet 42b and an inlet 42a that are both connected to the piston chamber 10a. Specifically, when the piston 20 moves away from the pump head 40, the pump chamber generates a negative pressure, which draws the laundry detergent from the laundry detergent box into the pump chamber through the inlet 42a. When the piston 20 moves closer to the pump head 40, the pressure in the pump chamber increases, which pushes the laundry detergent out from the outlet 42b and delivers it to the cylinder assembly through the pump head 40, thereby realizing the automatic dispensing of the laundry detergent.

[0109] In the known related technologies, in order to install the piston 20 into the piston chamber 10a, the pump body 10 is generally set in a split manner. For example, an additional cover is set to form the piston chamber 10a together with other parts. In the related technologies, an end cover for assembling the drive assembly 30 is also provided so that the drive assembly 30 is connected to a preset position.

[0110] In this embodiment, the pump body 10 is a one-piece structure, directly forming the piston chamber 10a. This reduces the number of connection points between different components, thereby reducing potential leakage and failure points, allowing it to withstand longer use, and improving the overall stability and reliability of the piston pump 100. The drive assembly 30 is connected to the pump body 10, and a portion of the drive assembly 30 extends into the piston chamber 10a to drive the piston 20 to reciprocate, ensuring smooth reciprocating motion of the piston 20. By using a portion of the pump body 10 as a mounting component for the drive assembly 30, the number of parts in the piston pump 100 is reduced, simplifying the assembly process. Due to the reduction in the number of parts, manufacturing costs are also reduced, including not only material costs but also reduced processing and assembly costs.

[0111] Please continue reading. Figure 2 and Figure 3Understandably, along the sliding direction of the piston 20, the pump body 10 has a first end close to the pump head 40 and a second end away from the pump head 40. It should be noted that in actual use, the piston pump 100 is installed vertically, with the first end located above the second end, that is, the pump head 40 is located above. The piston chamber 10a has a connecting port 112a that passes through the first end of the pump body 10. During installation, the piston 20 can be installed in the piston chamber 10a through the connecting port 112a. The aforementioned liquid inlet 42a and liquid inlet 42a are both connected to the piston chamber 10a through the connecting port 112a. The drive assembly 30 is located closer to the second end than the first end. That is, the drive assembly 30 and the pump head 40 are located near the top and bottom of the piston pump 100, respectively, which can effectively utilize space and reduce the space occupied by the piston pump 100.

[0112] The piston pump 100 also includes an inlet check valve 91 and an outlet check valve 92. The inlet check valve 91 is connected to the valve plate 42 and is used to open and close the inlet port 42a. The inlet check valve 91 allows the laundry detergent to flow from the laundry treatment chamber into the piston chamber 10a through the inlet port 42a, while preventing the liquid from flowing back into the laundry treatment chamber. The outlet check valve 92 is connected to the side of the valve plate 42 opposite to the inlet check valve 91 and is used to open and close the outlet port 42b. The outlet check valve 92 allows the laundry detergent to flow from the piston chamber 10a into the cylinder assembly through the outlet port 42b, while preventing the liquid from flowing back into the piston chamber 10a. The inlet check valve 91 and the outlet check valve 92 ensure that the flow of the laundry detergent in the piston chamber 10a is unidirectional, reducing backflow when the piston pump 100 stops working.

[0113] Please continue reading. Figure 2 and Figure 3 In some embodiments, the pump body 10 includes a pump column housing 11 and a motor base 12. The pump column housing 11 has a piston chamber 10a, which accommodates the movement of the piston 20 and can temporarily store the laundry detergent. The pump column housing 11 may be designed as a cylindrical shell, which helps to evenly distribute the pressure inside the pump column housing 11 and reduce local stress concentration. Understandably, the pump column housing 11 and the motor base 12 are integrally formed, which reduces the risk of leakage of the laundry detergent in the piston chamber 10a and improves the reliability of the piston pump 100; it also improves the overall strength and stability of the pump body 10, enabling it to withstand greater pressure and impact.

[0114] The motor mount 12 provides installation space for the drive assembly 30 and protects it from displacement caused by external impacts. The motor mount 12 is connected to the pump column housing 11, specifically to the outer peripheral wall of the pump column housing 11, so that the drive assembly 30 and the pump body 10 form a stable connection. The motor mount 12 has a mounting cavity 12a, in which part of the drive assembly 30 can be installed. The bottom wall of the mounting cavity 12a has a through hole 12b communicating with the piston cavity 10a. Part of the drive assembly 30 passes through the mounting cavity 12a and the through hole 12b and extends into the piston cavity 10a to connect with the piston 20, ensuring that the piston 20 can reciprocate smoothly.

[0115] Please see Figure 4 and Figure 5 In some embodiments, the motor mount 12 includes a mount body 121 and a mounting plate 122. The mount body 121 is connected to the pump column housing 11 and extends radially away from the pump column housing 11. The mounting plate 122 is connected to the side of the mount body 121 away from the pump column housing 11. The mount body 121 and the mounting plate 122 together form a mounting cavity 12a, providing a stable mounting space for the drive assembly 30.

[0116] The motor mount 12 also includes a support rib 13, which is connected to the outer peripheral wall of the mount body 121 and the outer surface of the mounting plate 122 facing away from the drive assembly 30. The support rib 13 can increase the contact area between the mounting plate 122 and the mount body 121, provide additional support points, enhance the connection strength between the mount body 121 and the mounting plate 122, effectively improve the overall rigidity of the motor mount 12, enhance the stability of the motor mount 12, and reduce the deformation that may occur in the motor mount 12 during the operation of the piston pump 100, thereby improving the durability and reliability of the motor mount 12.

[0117] Understandably, multiple support ribs 13 are provided, and the multiple support ribs 13 are respectively connected to both sides of the base body 121 and the mounting plate 122, which improves the load capacity of the motor base 12 and makes the installation of the drive assembly 30 more stable.

[0118] Please continue reading. Figure 4 and Figure 5 In some embodiments, the drive assembly 30 includes a motor housing 31 and a motor 32. The motor housing 31 has a motor cavity 31a, and the motor 32 is mounted in the motor cavity 31a. The motor 32 is used to drive the piston 20 to perform reciprocating motion. The motor housing 31 provides a safety barrier for the internal motor 32. Understandably, the motor housing 31 may be made of a high-strength plastic shell, which has sufficient strength and durability to protect the internal motor 32, and is relatively lightweight and has good insulation.

[0119] The motor housing 31 also has a wire passage hole 31b, which is located on the peripheral side wall of the motor housing 31 and communicates with the motor cavity 31a. The wire passage hole 31b is used to lead out the power cable of the motor 32 from the motor cavity 31a, making the lead-out and layout of the power cable of the motor 32 more orderly, reducing the tangling between cables, and improving the neatness and aesthetics of the piston pump 100.

[0120] Please continue reading. Figure 4 and Figure 5 To ensure that the motor 32 is contained within the motor housing 31 during assembly, a latch 33 is provided on one of the inner wall surface of the motor housing 31 and the outer wall surface of the motor 32. The latch 33 engages with the other of these surfaces, thus confining the motor 32 within the motor cavity 31a. The latch 33 design simplifies and speeds up the assembly process of the motor 32 and the motor housing 31, preventing the motor 32 from detaching from the motor housing 31 and improving the safety of motor operation. Furthermore, the disassembly process using the latch 33 is equally convenient, allowing the motor 32 to be quickly removed from the motor housing 31 when maintenance or replacement is required, thus improving maintenance efficiency.

[0121] In one configuration, when the outer wall of the motor 32 is configured to have a latch 33, the inner wall of the motor housing 31 is provided with a slot that can be engaged by the latch 33. During assembly, the motor 32 is pushed against the inner wall of the motor housing 31 by an appropriate force, so that the latch 33 is tightly engaged with the slot.

[0122] In another configuration, when the inner wall of the motor housing 31 is configured with latches 33, the latches 33 can tightly engage with the bottom of the motor 32 after the motor 32 is pushed into the motor cavity 31a. Understandably, multiple latches 33 can be provided, arranged circumferentially along the inner wall of the motor housing 31. This confines the main body of the motor 32 within the motor cavity 31a, allows multiple latches 33 to evenly bear the load, reduces stress concentration associated with a single latch 33, and increases the number of contact points, improving the connection reliability between the motor 32 and the motor housing 31. Two, three, or four latches 33 can be provided; this application does not limit this.

[0123] like Figure 5 and Figure 6As shown, specifically, the buckle 33 has a first guide surface 331 that slides with the motor 32. The first guide surface 331 gradually tilts towards the central axis of the motor 32 in the direction of insertion of the motor 32 into the motor cavity 31a. The first guide surface 331 makes it easier and smoother for the motor 32 to be inserted into the motor cavity 31a, reducing friction and resistance during the assembly process, simplifying the assembly process, and making the assembly of the motor 32 simpler.

[0124] Furthermore, the latch 33 also has a second guide surface 332 that slides with the motor 32. The second guide surface 332 gradually tilts toward the central axis of the motor 32 in the direction of the motor 32 moving out of the motor cavity 31a. The first guide surface 331 is set closer to the mounting plate 122 than the second guide surface 332. The second guide surface 332 is used to guide the motor 32 out of the motor cavity 31a, reducing friction and resistance during the disassembly of the motor 32, reducing damage caused during disassembly, and thus extending the service life of the motor 32.

[0125] like Figure 5 , Figure 6 and Figure 7 As shown, in order to securely connect the motor housing 31 to the pump body 10, it is specifically connected to the mounting plate 122. The mounting plate 122 is provided with a first fixing member 50, and the motor housing 31 has a second fixing hole 311a. The piston pump 100 also includes a fixing member 50, which passes through the first fixing hole 122a and the second fixing hole 311a to lock the motor housing 31 and the pump body 10, forming a secure connection and reducing the possibility of the drive assembly 30 becoming loose due to vibration or impact during the operation of the washing machine.

[0126] Understandably, the first fixing hole 122a and the second fixing hole 311a can be threaded holes, and the fastener 50 can be a bolt. This allows for quick assembly, facilitates the installation and disassembly of the drive assembly 30 and the pump body 10, and reduces the difficulty of subsequent maintenance.

[0127] It should be noted that the end face of the mounting plate 122 facing the motor housing 31 is flat, which can support the end faces of the bottom of the motor housing 31 and the motor 32. The flat surface provides a flat and stable contact surface, which can provide solid support, facilitate quick alignment during assembly, help reduce errors in the installation process, and make installation more convenient. It also helps to reduce the noise and vibration generated by the drive assembly 30 during operation.

[0128] Furthermore, to further improve the accuracy and convenience of assembly, one of the mounting plate 122 and the motor 32 is provided with a limiting protrusion 1221, and the other of the mounting plate 122 and the motor 32 is provided with a limiting hole 321a. The limiting protrusion 1221 is inserted into the limiting hole 321a. The matching design of the limiting protrusion 1221 and the limiting hole 321a allows the mounting plate 122 and the motor 32 to achieve precise pre-positioning during the assembly process, reducing assembly errors. This allows the motor 32 to be in the correct pre-installation position before it is fully fixed, thereby simplifying the assembly steps. During the insertion and locking of the fastener 50, due to the accuracy of the pre-positioning, no additional assistance is required, and a single person can complete the entire assembly work.

[0129] Furthermore, the cooperation between the limiting protrusion 1221 and the limiting hole 321a increases the stability between the mounting plate 122 and the motor 32, reduces the relative movement between the two during the operation of the piston pump 100, and extends the service life of the piston pump 100.

[0130] like Figure 5 , Figure 6 and Figure 7 As shown, in some embodiments, the inner peripheral wall of the motor cavity 31a has a foolproof groove 31e; the mounting plate 122 is provided with a foolproof part 1222 adapted to the foolproof groove 31e. The foolproof part 1222 is embedded in the foolproof groove 31e. Through the cooperation of the foolproof groove 31e and the foolproof part 1222, it can be ensured that the motor 32 is correctly positioned during the assembly process, which can reduce the uncertainty and operation difficulty for users when assembling the motor 32. In practical applications, the foolproof groove 31e can be an arc-shaped groove provided on the inner wall of the motor cavity 31a, and the foolproof part 1222 is an arc-shaped plate adapted to the arc-shaped groove. The arc-shaped plate can be embedded in the arc-shaped groove. Since the arc-shaped plate protrudes from the mounting plate 122, if the user does not align the installation in the circumferential direction, the arc-shaped plate will abut against the bottom wall of the motor housing 31, providing a physical barrier. The user can quickly identify assembly problems and improve the user's assembly efficiency.

[0131] To achieve circumferential positioning between the motor 32 and the motor housing 31, the motor housing 31 also has a groove 31d. The groove 31d is located on the cavity wall of the motor cavity 31a, on the side close to the mounting plate 122. The groove 31d communicates with the motor cavity 31a. The motor 32 is provided with a connecting ear 321, which is located on the outer periphery of the motor 32 and close to the mounting plate 122. The connecting ear 321 can be engaged in the groove 31d to ensure the correct positioning of the motor 32 in the motor housing 31, thereby improving the assembly accuracy and consistency and reducing the risk of displacement of the piston pump 100 due to vibration or impact during operation.

[0132] The motor housing 31 is provided with a support lug 311, which is arranged opposite to the connecting lug 321. The support lug 311 has the second fixing hole 311a, and the connecting lug 321 has a third fixing hole 321b. The third fixing hole 321b is arranged at intervals with the limiting block. The fixing member 50 is sequentially inserted through the second fixing hole 311a, the third fixing hole 321b and the first fixing hole 122a to form a solid connection structure, which effectively fixes both the motor housing 31 and the motor 32 on the mounting plate 122, enhancing the connection stability between the drive assembly 30 and the pump body 10.

[0133] Understandably, to increase the stability of the connection between the motor housing 31, the motor 32, and the mounting plate 122, two connecting ears 321 and two supporting ears 311 are provided. The two connecting ears 321 are symmetrically arranged on both radial sides of the motor 32, and the two supporting ears 311 are symmetrically arranged on both radial sides of the motor housing 31. The mounting plate 122 includes a main plate and two side plates. The main plate can be semi-circular. The side plates are respectively connected to both sides of the main plate and are arranged opposite to the connecting ears 321. This increases the number of connection points, improves the reliability of the connection between the drive assembly 30 and the mounting plate 122, and helps to balance the load of the motor 32 during operation, reducing wear caused by uneven load.

[0134] For example, the connecting ear 321 is provided with a limiting hole 321a, and the mounting plate 122 is provided with a limiting protrusion 1221. The limiting protrusion 1221 protrudes from the side of the mounting plate 122 facing the connecting ear 321. It should be noted that at least a portion of the limiting protrusion 1221 has a gap with the hole wall of the limiting hole 321a, which provides a certain vibration space for the vibration generated during the operation of the motor 32, so that the limiting protrusion 1221 does not completely restrict the slight movement of the motor 32. The existence of the gap reduces the rigid contact between the motor 32 and the mounting plate 122, so that the motor 32 can run more smoothly and also reduces the wear caused by vibration of the motor 32 during long-term operation.

[0135] In one configuration, the limiting protrusion 1221 is a half-cylindrical protrusion (e.g., Figure 7 The limiting protrusion 1221 is a semi-cylinder, which makes it easier to align and insert into the limiting hole 321a during assembly, reducing assembly time. On the other hand, there is a gap between the semi-cylinder and the limiting hole 321a, which allows the motor 32 to have a certain vibration space during operation, reducing structural damage caused by vibration.

[0136] Furthermore, in order to avoid the assembly of the fastener 50 and prevent the fastener 50 from interfering with the outer wall surface of the motor housing 31, the outer wall surface of the motor housing 31 is provided with a clearance groove 31c. The clearance groove 31c extends along the axial direction of the motor 32. The second fixing hole 311a is located on the extension path of the clearance groove 31c. The clearance groove 31c is used to avoid the fastener 50 inserted into the second fixing hole 311a, so that the fastener 50 can pass smoothly through the second fixing hole 311a without conflicting with the outer wall surface of the motor housing 31.

[0137] The clearance groove 31c provides a clear assembly path, allowing the fastener 50 to be inserted into the second fixing hole 311a along the preset assembly path, reducing assembly difficulty. Furthermore, by providing the clearance groove 31c, the extension length of the support lug 311 and connecting lug 321 is not excessively long. In other words, if the second fixing hole 311a is set too far from the main body of the motor housing 31, it will reduce structural strength and affect assembly stability. The clearance groove 31c improves the compactness of the piston pump 100.

[0138] Please continue reading. Figure 5 , Figure 6 and Figure 7 In some embodiments, the base body 121 has the aforementioned through hole 12b, and the drive assembly 30 further includes a bushing 34, which is sleeved on the motor shaft of the motor 32. Since the direct connection between the bushing 34 and the motor shaft can reduce energy loss and improve transmission efficiency. Driven by the shaft of motor 32, bushing 34 is rotatably disposed in mounting cavity 12a. A drive part 341 is eccentrically disposed on the side of bushing 34 away from motor 32. The drive part 341 passes through through hole 12b and is connected to piston 20. Specifically, piston 20 may be provided with drive groove 20a. Drive groove 20a is disposed perpendicular to the axial direction of piston cavity 10a and extends laterally along the width direction of piston 20. Part of drive part 341 can be inserted into drive groove 20a. When the shaft of motor 32 rotates, drive part 341 will move along a circular path. The radius of this circular path is the distance from the center of drive part 341 to the center of motor 32 shaft. Since drive part 341 is connected to drive groove 20a, piston 20 will be pushed and move linearly along piston cavity 10a.

[0139] The bushing 34 has a convex ring 342 on its outer peripheral wall. The diameter of the convex ring 342 is larger than the diameter of the through hole 12b, so that the lower end face of the convex ring 342 abuts against the bottom wall of the mounting cavity 12a. The convex ring 342 provides an additional support point, which enhances the connection strength between the bushing 34 and the seat body 121. It can limit the bushing 34 and prevent the bushing 34 from falling completely into the piston cavity 10a, so that the bushing 34 is correctly positioned on the seat body 121, and the drive unit 341 can be correctly connected to the piston 20 and perform its function.

[0140] In practical use, the inlet 42a needs to be connected to the liquid storage chamber of the laundry detergent dispenser, while the outlet 42b needs to be connected to the cartridge assembly. If the pump head 40 is incorrectly assembled with the pump body 10, the following consequences may occur: the inlet 42a will be connected to the cartridge assembly, while the outlet 42b will be connected to the liquid storage chamber. This will cause the piston pump 100 to lose its automatic dispensing function for the laundry detergent. Therefore, if... Figure 8 and Figure 9 As shown, the pump head 40 is provided with a first anti-misfit notch 42c, and the pump body 10 is provided with a second anti-misfit notch 10c. The first anti-misfit notch 42c and the second anti-misfit notch 10c correspond to each other. The setting of the first anti-misfit notch 42c and the second anti-misfit notch 10c effectively prevents the pump head 40 and the pump body 10 from being incorrectly assembled, improves the accuracy and efficiency of assembly, and avoids the failure or safety accident of the piston pump 100 that may be caused by improper assembly.

[0141] like Figure 8 , Figure 9 and Figure 10 As shown, in some embodiments, the pump head 40 includes a pump cover 41 and a valve plate 42. The pump cover 41 has a receiving groove 41e on the side facing the connecting plate 112. The receiving groove 41e communicates with both the inlet channel 41a and the outlet channel 41b. At least a portion of the valve plate 42 is housed within the receiving groove 41e and is located between the pump cover 41 and the connecting plate 112. The pump cover 41 protects the internal valve plate 42 and prevents external impurities from entering the piston chamber 10a. The pump cover 41 can limit the valve plate 42 through the receiving groove 41e, so that the valve plate 42 is maintained in the correct position within the pump head 40 and provides necessary support for the valve plate 42. The valve plate 42 has the aforementioned inlet 42a and outlet 42b. The pump cover 41 is also provided with an inlet channel 41a communicating with the inlet 42a and an outlet channel 41b communicating with the outlet 42b. Understandably, the inlet channel 41a is connected to the storage chamber of the laundry detergent box, while the outlet channel 41b is connected to the cylinder assembly, forming a complete path for the laundry detergent to enter and exit the piston chamber 10a.

[0142] The valve plate 42 is provided with the first anti-fool notch 42c, which penetrates the valve plate 42 along its thickness direction. The pump cover 41 is provided with a third anti-fool notch 41c, which penetrates the pump cover 41 along its thickness direction. That is, the shape of the receiving groove 41e is also consistent with the shape of the valve plate 42. Since the valve plate 42 is provided with an inlet 42a and an outlet 42b, and the pump cover 41 is provided with an inlet channel 41a and an outlet channel 41b, during assembly, the inlet 42a needs to be aligned with the inlet channel 41a, and the outlet channel 41b needs to be aligned with the outlet 42b. The third anti-fool notch 41c enables the valve plate 42 and the pump cover 41 to be correctly aligned during assembly, reducing assembly time and improving assembly accuracy.

[0143] The design of the first foolproof notch 42c and the third foolproof notch 41c makes the assembly process more intuitive and simple. Operators can quickly identify the correct assembly direction and position, reducing assembly time and the risk of component damage caused by forced or incorrect assembly. Furthermore, in automated assembly lines, the design of the first foolproof notch 42c, the second foolproof notch 10c, and the third foolproof notch 41c helps machines identify and position components, facilitating the automated assembly of the piston pump 100.

[0144] For example, when the valve plate 42 is a rectangular plate, the first anti-fooling notch 42c is a corner notch of the rectangular plate. Assembly can only be completed when the valve plate 42, pump body 10 and pump cover 41 are aligned in the correct way, thereby ensuring the accuracy of assembly. The notch provides the operator with a clear visual prompt, making the assembly direction and position clear at a glance, and simplifying the assembly process.

[0145] Please continue reading. Figure 8 , Figure 9 and Figure 10 For the pump body 10, it is understood that the second anti-fool notch 10c is provided on the pump column housing 11 and is located on the side near the pump head 40. The pump column housing 11 includes a housing body 111, a connecting plate 112 and a plurality of spaced first connecting portions 113. The housing body 111 has the aforementioned piston chamber 10a. The connecting plate 112 is connected to the first end of the housing body 111, that is, the side near the pump head 40. The connecting plate 112 has the aforementioned second anti-fool notch 10c, and the plurality of spaced first connecting portions 113 are connected to the outer edge of the connecting plate 112. The first connecting portion 113 has a first connecting hole 113a. The pump cover 41 is provided with a second connecting portion 412. The second connecting portion 412 is disposed opposite to the first connecting portion 113, which helps to improve the assembly accuracy between the pump cover 41 and the connecting plate 112. The second connecting part 412 has a second connecting hole 412a. The piston pump 100 also includes a connector 60, which is inserted into the first connecting hole 113a and the second connecting hole 412a to fix the pump cover 41 to the connecting plate 112, thereby improving the connection stability of the pump column housing 11 and the pump cover 41.

[0146] Multiple first connecting parts 113 are arranged at intervals on the outer edge of the connecting plate 112, which can realize the circumferential connection stability between the pump column housing 11 and the pump head 40, increase the connection points between the pump column housing 11 and the pump cover 41, thereby improving the connection strength and reducing the displacement of the pump head 40 during the operation of the piston pump 100.

[0147] Understandably, four first connecting parts 113 may be provided, and the connecting plate 112 is a rectangular plate. The four first connecting parts 113 are located at the middle of each side of the rectangular plate, which makes the connection between the pump cover 41 and the connecting plate 112 more balanced and can more effectively resist deformation or damage caused by uneven force; and the connection load is evenly distributed, reducing local stress concentration and extending the service life of the connecting parts 60.

[0148] Furthermore, the first connecting hole 113a and the second connecting hole 412a can be threaded holes, and the connecting piece 60 is a bolt. The bolt is inserted into the two threaded holes in sequence. The threaded connection facilitates installation and adjustment, and also allows the pump head 40 to be quickly disassembled when needed, which is convenient for maintenance and repair.

[0149] To ensure a tighter connection between the second connecting portion 412 and the second connecting portion 412, the pump cover 41 includes a cover body 411. The cover body 411 has the aforementioned receiving groove 41e. Multiple second connecting portions 412 are connected to the outer edge of the cover body 411. The pump cover 41 also has multiple connecting grooves 41d, which are disposed on the peripheral wall of the receiving groove 41e. The connecting grooves 41d are arranged closer to the connecting plate 112 than the second connecting portions 412. Each connecting groove 41d corresponds to one of the multiple second connecting portions 412. The first connecting portion 113 passes through the connecting plate 112. Within the groove 41d, the connecting groove 41d can position the first connecting part 113. The first connecting part 113 can be inserted along the depth direction of the connecting groove 41d as a preset insertion path, making it easier to align the first connecting part 113 and the second connecting part 412. This allows the end face of the first connecting part 113 to fit with the end face of the second connecting part 412, improving the tightness of the connection between the connecting member 60 and the pump cover 41 and the connecting plate 112. The tight fit of the end faces also helps to prevent leakage of the clothing treatment agent, ensuring the sealing between the pump cover 41 and the connecting plate 112.

[0150] like Figure 8 As shown, it should be noted that the end face of the first connecting part 113 near the first end is higher than the end face of the connecting plate 112 near the first end, and the valve plate 42 has a limiting notch 42d. The limiting notch 42d can be matched with a portion of the outer peripheral wall of the first connecting part 113 for limiting cooperation. That is, multiple first connecting parts 113 can abut against the valve plate 42 in the circumferential direction, so that the valve plate 42 can be accurately positioned during installation and reduce assembly errors.

[0151] Please continue reading. Figure 9In some embodiments, one of the pump cover 41 and the connecting plate 112 is provided with a fastening part 1121, and the other of the pump cover 41 and the connecting plate 112 is provided with a fastening hole 41h. A portion of the fastening part 1121 is fastened into the fastening hole 41h. During assembly, by fastening the fastening part 1121 into the fastening hole 41h, the pump cover 41 and the connecting plate 112 are pre-connected, which prepares for the subsequent insertion of the connector 60 to lock the pump cover 41 and the connecting plate 112. After the pre-connection of the pump cover 41 and the connecting plate 112 is achieved, the assembler can independently complete the locking work of the connector 60 without assistance, reducing the difficulty of assembling the pump cover 41 and the connecting plate 112.

[0152] like Figure 9 and Figure 10 As shown, in one configuration, a fastening part 1121 and a fastening hole 41h form a group. In this embodiment, multiple groups of fastening parts 1121 and fastening holes 41h can be provided. For example, two groups can be provided, with the two groups of fastening parts 1121 and fastening holes 41h arranged diagonally. Four groups can also be provided, with the four groups of fastening parts 1121 and fastening holes 41h respectively located at the four corners. This application does not limit this.

[0153] Specifically, the connecting plate 112 is provided with a fastening part 1121, which is located on the outer edge of the connecting plate 112 and extends from the inside to the outside. The fastening part 1121 has a first guide slope 1121a, and the pump cover 41 is provided with a fastening hole 41h, which has a second guide slope 41h1. The second guide slope 41h1 is disposed on the side wall of the receiving groove 41e, and the fastening hole 41h penetrates the side wall of the receiving groove 41e. When the connecting plate 112 and the pump cover 41 are fastened together, the fastening part 1121 slides and abuts against the second guide slope 41h1 through the first guide slope 1121a, so that the fastening part 1121 slides into the fastening hole 41h. The first guide slope 1121a and the second guide slope 41h1 can guide the movement path of the fastening part 1121, simplifying the assembly process.

[0154] To further enhance the sealing between the connecting plate 112 and the valve plate 42, the connecting plate 112 also has a first sealing groove 112b and the aforementioned connecting port 112a. The connecting port 112a communicates with the piston chamber 10a. The first sealing groove 112b is arranged around the periphery of the connecting port 112a. The piston pump 100 also includes a first sealing element 70, which is embedded in the first sealing groove 112b. Understandably, the first sealing element 70 is an annular sealing element. The first sealing element 70 is used to seal the connecting plate 112 and the valve plate 42. The first sealing element 70 can effectively prevent the clothing treatment agent from leaking from the connecting port 112a and also prevent external impurities from entering the connecting port 112a, so as to achieve a good seal between the connecting plate 112 and the valve plate 42.

[0155] Please continue reading. Figure 9 and Figure 10 Next, the valve plate 42 is provided with an annular first sealing part 422 on the side facing the connecting plate 112. The first sealing part 422 presses the first sealing member 70 in the direction of the first sealing groove 112b to press the first sealing member 70 against the bottom wall of the first sealing groove 112b. This helps to maintain the accuracy of the sealing position of the first sealing member 70 during the use of the piston pump 100, and prevents the first sealing member 70 from falling out of the first sealing groove 112b due to external vibration, thus preventing sealing failure. Moreover, after being uniformly compressed, the first sealing member 70 can fill the gap between the valve plate 42 and the connecting plate 112, improving the sealing effect of the first sealing member 70.

[0156] Understandably, the shape and size of the first sealing part 422 are adapted to the shape and size of the first sealing member 70, that is, the first sealing part 422 is an annular sealing part, so that the first sealing member 70 is effectively compressed.

[0157] In some embodiments, the connecting plate 112 is provided with a plurality of weight-reduction grooves 112c (e.g. Figure 7 Multiple weight-reducing grooves 112c are arranged at intervals along the outer periphery of the first sealing groove 112b. On the one hand, setting the weight-reducing grooves 112c can appropriately reduce the weight of the connecting plate 112, reduce the use of materials, and achieve the lightweighting of the piston pump 100. On the other hand, setting the weight-reducing grooves 112c helps to reduce the internal stress of the material during the injection molding process, thereby reducing the cracks caused by stress concentration when the connecting plate 112 is demolded.

[0158] In some embodiments, a leakage hole 10b is provided at the second end of the pump body 10 (e.g., Figure 8 Specifically, the drain hole 10b is located at the second end of the shell body 111 and is connected to the piston chamber 10a. Since the piston pump 100 is installed vertically and the drain hole 10b is located at the bottom end of the shell body 111, when the piston 20 ages or is damaged and can no longer seal the laundry detergent in the pump chamber, the laundry detergent will accumulate at the bottom end of the shell body 111 due to gravity. At this time, since the bottom end is provided with a drain hole 10b connected to the piston chamber 10a, the laundry detergent will flow out from the drain hole 10b, which can be intuitively discovered by the user so as to deal with the leakage problem in time and reduce the time and difficulty of fault diagnosis.

[0159] like Figure 10As shown, in order to achieve a double anti-mistake effect for the installation of valve plate 42 and pump cover 41, at least one of valve plate 42 and pump cover 41 is provided with anti-mistake hole 41f, and at least the other of valve plate 42 and pump cover 41 is provided with anti-mistake protrusion 423. The anti-mistake protrusion 423 is inserted into the anti-mistake hole 41f to ensure correct alignment and assembly between valve plate 42 and pump cover 41, reducing assembly difficulty and error rate, and can cooperate with the first anti-mistake notch 42c and the third anti-mistake notch 41c to form a double anti-mistake effect.

[0160] Understandably, in the actual assembly process, the inlet check valve 91 and the outlet check valve 92 are first installed on the valve plate 42, and then the valve plate 42 is assembled with the pump cover 41. If the anti-foolproof hole 41f and the anti-foolproof protrusion 423 are not provided, the inlet 42a of the valve plate 42 and the outlet channel 41b of the pump cover 41 will be opposite to each other and connected. This incorrect assembly will directly affect the normal operation of the piston pump 100. The anti-foolproof protrusion 423 and the anti-foolproof hole 41f can effectively prevent the above-mentioned assembly error from occurring.

[0161] Specifically, the pump cover 41 is provided with a foolproof hole 41f, which can be provided in the bottom wall of the accommodating cavity and penetrate through the bottom wall of the accommodating cavity. The valve plate 42 is provided with a foolproof protrusion 423. The valve plate 42 includes a plate body 421 and a foolproof protrusion 423. The foolproof protrusion 423 is provided on the side of the plate body 421 facing the pump cover 41 and is inserted into the foolproof hole 41f.

[0162] Two anti-mistake protrusions 423 can be provided, and the two anti-mistake protrusions 423 are arranged diagonally. The diagonal layout helps the anti-mistake protrusions 423 to distribute the force evenly during the assembly process, reducing the damage to the anti-mistake protrusions 423 caused by excessive force on a single point. In addition, the diagonally arranged anti-mistake protrusions 423 can prevent the valve plate 42 from rotating during the assembly process, thus playing a positioning role.

[0163] like Figure 10 and Figure 11 As shown, in some embodiments, the pump cover 41 is provided with a snap-fit ​​hole 41g, and the valve plate 42 also includes a cantilever hook 424. One end of the cantilever hook 424 is connected to the plate body 421 at an angle, and the other end is fastened to the snap-fit ​​hole 41g, so that the pump cover 41 and the valve plate 42 form a firm connection and prevent the connection from loosening due to vibration or pressure changes. The cantilever hook 424 and the snap-fit ​​hole 41g enable the pump cover 41 and the valve plate 42 to be quickly assembled and disassembled.

[0164] like Figure 11As shown, specifically, the cantilever hook 424 includes a plug-in portion 4241 and a hook portion 4242. One end of the plug-in portion 4241 is connected to the plate body 421, forming a 90° angle with the plate body 421, and extends toward the pump cover 41, passing through the hook-in hole 41g. This helps to improve the connection stability between the valve plate 42 and the pump cover 41 and reduce relative movement. The hook portion 4242 is connected to the other end of the plug-in portion 4241 and hooks with the outer wall surface of the pump cover 41, which can improve the connection strength between the pump cover 41 and the valve plate 42.

[0165] The cantilever hook 424 also includes a reinforcing part, which is connected to the insertion part 4241 and the plate body 421. The reinforcing part helps to improve the stability of the cantilever hook 424 during use, reduce the breakage of the insertion part 4241 due to external force, and improve the durability of the cantilever hook 424.

[0166] Two cantilever hooks 424 can be provided, and the two cantilever hooks 424 are arranged diagonally to increase the stability between the valve plate 42 and the pump cover 41, reduce the deformation or damage caused by excessive force on a single cantilever hook 424 as a connection point, and the diagonally arranged cantilever hooks 424 help prevent the pump cover 41 from tilting when subjected to uneven force, and maintain the flatness of the pump cover 41.

[0167] For example, the plate body 421 can be a rectangular plate, then the two cantilever hooks 424 and the two anti-fooling protrusions 423 are located at the four corners of the plate body 421, which can position the four corners of the valve plate 42 and better fix the valve plate 42, preventing it from shifting or rotating during assembly or use, thus improving the stability of the assembly.

[0168] like Figure 10 , Figure 12 and Figure 13 As shown, in some embodiments, the pump cover 41 includes a cover body 411, which has a receiving groove 41e and a second sealing groove 411a communicating with each other. A plate body 421 is housed in the receiving groove 41e. The outlet of the inlet channel 41a is located on the bottom wall of the receiving groove 41e and communicates with the inlet port 42a. The inlet of the outlet channel 41b is located on the bottom wall of the receiving groove 41e and communicates with the outlet port 42b. The second sealing groove 411a is annularly disposed around the outlet of the inlet channel 41a and the outlet channel 41b. The piston pump 100 also includes a second seal 80, which is embedded in the second sealing groove 411a. The second seal 80 is used to seal the connection between the cover body 411 and the plate body 421. The second seal 80 can effectively seal the connection between the outlet of the liquid inlet channel 41a and the liquid inlet 42a, as well as the connection between the liquid outlet channel 41b and the liquid outlet 42b, to prevent the clothing treatment agent from leaking at the connection between the cover body 411 and the plate body 421, and to ensure the normal operation of the piston pump 100.

[0169] like Figure 10 and Figure 11 As shown, the valve plate 42 further includes a second sealing part 425. The second sealing part 425 is connected to the side of the plate body 421 facing the receiving groove 41e. The second sealing part 425 is used to squeeze the second sealing member 80 in the direction of the receiving groove 41e, so as to evenly and tightly press the second sealing member 80 against the bottom wall of the second sealing groove 411a, so that the second sealing member 80 is firmly limited between the valve plate 42 and the pump cover 41, and fills the gap between the valve plate 42 and the pump cover 41, thereby improving the sealing effect of the second sealing member 80.

[0170] like Figure 10 As shown, specifically, the second sealing element 80 includes a first sealing part 81 and a second sealing part 82 that are interconnected in sequence. The first sealing part 81 is arranged around the inlet of the liquid outlet channel 41b, and the second sealing part 82 is arranged around the outlet of the liquid inlet channel 41a. That is, the first sealing element 70 is an “8” shaped sealing element. The shapes of the second sealing groove 411a and the second sealing part 425 are consistent with the shape of the first sealing element 70. It should be noted that the first sealing part 81 and the second sealing part 82 are integrally formed, which improves the strength and durability of the second sealing element 80.

[0171] like Figure 12 and Figure 13 As shown, because the second sealing groove 411a is set on the bottom wall of the receiving groove 41e, the part of the cover body 411 with the second sealing groove 411a is relatively thin. In order to maintain the structural strength of the cover body 411, a reinforcing seat 416 can be protruded on the side of the cover body 411 away from the second sealing groove 411a. The reinforcing seat 416 can compensate for the structural weak points of the cover body 411 and improve the overall strength of the cover body 411. During the operation of the piston pump 100, the cover body 411 will be affected by internal pressure. The reinforcing seat 416 helps to prevent the cover body 411 from deforming under pressure and improves the durability of the cover body 411.

[0172] like Figure 10 and Figure 11As shown, in some embodiments, the valve plate 42 further includes a first stop portion 426 and a second stop portion 427. The plate body 421 has the aforementioned spaced-apart inlet 42a and outlet 42b. The first stop portion 426 is connected to one side of the plate body 421, adjacent to the inlet 42a, and forms a back-to-back arrangement with the inlet check valve 91. The second stop portion 427 is connected to the other side of the plate body 421, adjacent to the outlet 42b, and forms a back-to-back arrangement with the first stop portion 426 and the outlet check valve 92. The valves are arranged in opposite directions, with the first stop 426 located within the projection of the inlet check valve 91 onto the plate body 421, and the second stop 427 located within the projection of the outlet check valve 92 onto the plate body 421. The purpose of setting the first stop 426 and the second stop 427 is to prevent the misinstallation of the inlet check valve 91 and the outlet check valve 92. By setting the first stop 426 and the second stop 427 as physical barriers, the inlet check valve 91 and the outlet check valve 92 can be installed in the correct position.

[0173] like Figure 7 , Figure 8 and Figure 12 As shown, in some embodiments, the pump head 40 has a first mounting hole 415a, and the pump body 10 has two second mounting holes 14a. Both the first mounting hole 415a and the second mounting hole 14a are used for assembly with the laundry detergent cartridge. The projection of the first mounting hole 415a along the axial direction of the piston cavity 10a falls between the two second mounting holes 14a, and the line connecting the two second mounting holes 14a is set at an angle to the axial direction of the piston cavity 10a. The piston pump 100 is provided with multiple connection points for the laundry detergent cartridge, which helps to distribute the force and reduce local stress concentration. The arrangement of the first mounting hole 415a and the two second mounting holes 14a restricts the movement of the piston pump 100 in the lateral and longitudinal directions, thereby improving the stability and reliability of the piston pump 100.

[0174] Specifically, since the piston pump 100 is installed vertically, the two second mounting holes 14a can limit the lateral swaying of the piston pump 100, while the first mounting hole 415a, located between the two second mounting holes 14a, can limit the vertical swaying of the piston pump 100. The cooperation between the first mounting hole 415a and the two second mounting holes 14a forms a stable triangular connection, which helps to provide additional support during vertical installation, reduces the swaying of the piston pump 100, and improves the stability of the connection between the piston pump 100 and the laundry detergent dispenser.

[0175] Furthermore, the axial direction of the piston chamber 10a passes through the center of the first mounting hole 415a, which ensures the symmetry and balance of the position of the first mounting hole 415a and improves the stability of the piston pump 100.

[0176] The two second mounting holes 14a are symmetrically arranged along the vertical plane containing the axial direction of the piston cavity 10a, meaning the line connecting the two second mounting holes 14a is perpendicular to the axial direction of the piston cavity 10a. This perpendicular assembly makes the connection between the laundry detergent box and the pump cover 41 more stable, reducing structural weaknesses caused by improper assembly. The combination of the vertical limiting effect of the first mounting hole 415a and the horizontal limiting effect of the second mounting hole 14a achieves multi-dimensional fixation of the piston pump 100, further improving the stability of the piston pump 100 connection.

[0177] It should be noted that the first mounting hole 415a and the second mounting hole 14a are parallel in axis and perpendicular to the axis of the piston chamber 10a, which helps to ensure the coaxiality between the pump head 40 and the pump body 10, thereby improving the stability of the piston pump 100 connection.

[0178] Please continue reading. Figure 7 , Figure 8 and Figure 12 In some embodiments, the pump body 10 further includes two mounting seats 14, which are respectively connected to both sides of the pump column housing 11. Specifically, they can be symmetrically arranged along the vertical plane where the piston chamber 10a is located. The symmetrically arranged mounting seats 14 can ensure that the piston pump 100 is subjected to more uniform force when assembled with the laundry detergent box, reducing deformation or damage caused by unilateral force. In addition, the two second mounting holes 14a limit the piston pump 100 in the lateral direction to prevent the piston pump 100 from rotating after assembly and keep it connected in the correct position.

[0179] Along the axial direction of the piston chamber 10a, the mounting base 14 is located between the pump head 40 and the motor base 12. Each mounting base 14 has at least one of the aforementioned second mounting holes 14a. Understandably, the second mounting holes 14a are located closer to the motor 32 than the first mounting holes 415a. The motor 32 will vibrate during operation. By providing the second mounting holes 14a near the motor 32, the vibration generated by the motor 32 during operation can be better absorbed and dispersed, resisting the stress caused by the vibration, and reducing the detachment of the piston pump 100 from the laundry detergent box due to vibration.

[0180] For example, the first mounting hole 415a and the second mounting hole 14a can both be threaded holes, and the laundry detergent box is provided with corresponding threaded holes at opposite positions. That is, the piston pump 100 is threadedly connected to the laundry detergent box, which provides a reliable fixing method to ensure a firm connection between the laundry detergent box and the pump cover 41 or the mounting base 14, and to prevent it from loosening.

[0181] Furthermore, to reduce the assembly difficulty of the assembly base 14 and the garment treatment agent box, the assembly base 14 also has positioning holes 14b arranged at intervals with the second assembly hole 14a. The positioning holes 14b are used to achieve pre-positioning with the garment treatment agent box. Understandably, the garment treatment agent box is provided with a positioning part that is adapted to the positioning hole 14b. The positioning part can be inserted into the positioning hole 14b so that the piston pump 100 and the garment treatment agent box can achieve pre-positioning. The assembly personnel then lock the garment treatment agent box through the second assembly hole 14a.

[0182] In some embodiments, the first mounting hole 415a is provided on the pump cover 41 and located between the inlet channel 41a and the outlet channel 41b, which helps to match the symmetry of the pump cover 41, reduces the possibility of eccentricity or misalignment caused by the provision of the first mounting hole 415a, and thus enhances the structural stability of the pump cover 41.

[0183] Please see Figure 12 and Figure 13 In some embodiments, the pump cover 41 further includes an inlet pump nozzle 413 and an outlet pump nozzle 414, as well as a bridging plate 415. The inlet pump nozzle 413 and the outlet pump nozzle 414 are both connected to the side of the cover body 411 or the reinforcing seat 416 away from the receiving groove 41e. The inlet pump nozzle 413 has the aforementioned inlet channel 41a, and the outlet pump nozzle 414 has the aforementioned outlet channel 41b. The two ends of the bridging plate 415 are connected to the inlet pump nozzle 413 and the outlet pump nozzle 414, and are located between the inlet pump nozzle 413 and the outlet pump nozzle 414. The bridging plate 415 helps to disperse the force on the pump cover 41, reduce local stress concentration, and reduce the impact of vibration on the inlet pump nozzle 413 and the outlet pump nozzle 414, thereby enhancing the structural stability and strength of the pump cover 41.

[0184] The bridging plate 415 is also connected to the side of the cover body 411 or the reinforcing seat 416 away from the receiving groove 41e and extends towards the side away from the receiving groove 41e. The bridging plate 415 has the aforementioned first mounting hole 415a, which optimizes the structural layout of the pump cover 41, making the layout of the liquid inlet channel 41a, the liquid outlet channel 41b and the first mounting hole 415a more compact and reasonable, and improving design efficiency.

[0185] Specifically, the bridging plate 415 includes a first plate and a second plate. The first plate is connected to the cover body 411 and extends in a direction away from the receiving groove 41e. The second plate is stacked on the first plate and located on the side close to the cover body 411. The first mounting hole 415a penetrates the first plate and the second plate. The first mounting hole 415a is thickened to compensate for the structural strength reduction that may be caused by the first mounting hole 415a, thereby enhancing the stability and durability of the bridging plate 415.

[0186] The aforementioned cover body 411, inlet pump nozzle 413, outlet pump nozzle 414, and bridging plate 415 are integrally formed, which improves the structural strength and stability of the pump cover 41 and reduces the time and maintenance cost of assembling the pump cover 41.

[0187] like Figure 14 and Figure 15 As shown, in some embodiments, the piston chamber 10a has a connecting port 112a that passes through one end of the pump body 10. The piston 20 is provided with an assembly part 221 on the side facing the connecting port 112a. The assembly part 221 is used to cooperate with external assembly tools to install the piston 20 in the piston chamber 10a. The design of the assembly part 221 makes the installation of the piston 20 easier. By cooperating with external assembly tools, the piston 20 can be installed quickly and accurately, improving assembly efficiency. Moreover, the design of the assembly part 221 can adapt to the needs of automated assembly lines, so that the installation of the piston 20 can be automated, improving production efficiency and consistency.

[0188] In one configuration, the assembly part 221 is an assembly protrusion. This protrusion facilitates gripping and positioning by automated assembly machinery, making it suitable for automated and semi-automated assembly lines and improving production efficiency. The assembly protrusion can be integrally formed with the plug body 22, reducing weak points in the material and increasing the overall structural strength of the plug body 22.

[0189] In another configuration, the assembly part 221 is an assembly slot, specifically one of a hexagonal socket, slotted head, or Phillips head slot. Hexagonal sockets, slotted heads, and Phillips head slots are all common screw head slot types, each suitable for different assembly tools and environments, providing diverse options to adapt to different assembly needs. Understandably, in practical use, the assembly part 221 is a slotted head. The slotted head design provides clear directional guidance, which is crucial for the installation of the piston 20 within the piston cavity 10a, ensuring the correct orientation of the piston 20 during installation.

[0190] Please continue reading. Figure 14 and Figure 15 In some embodiments, the piston 20 includes a guide body 21, a plug body 22, and a reinforcing rib 23. The guide body 21 is slidably fitted with the inner wall of the piston cavity 10a. The plug body 22 is connected to the end of the guide body 21, specifically the end of the guide body 21 facing the pump head 40. The guide body 21 can guide and support the plug body 22 at the end, and the cross-sectional area of ​​the plug body 22 is larger than the cross-sectional area of ​​the guide body 21, so that a pump cavity is formed between the plug body 22 and the pump head 40, reducing the flow of the clothing treatment agent into the part of the piston cavity 10a where the guide body 21 is located, and reducing the risk of leakage.

[0191] The reinforcing rib 23 is connected to the guide body 21 and the plug body 22, which can enhance the structural strength of the piston 20, prevent the piston 20 from deforming under frequent movement, improve the durability of the piston 20, and extend the service life of the piston 20.

[0192] To reduce the risk of clothing treatment agent leakage, the outer peripheral wall of the plug body 22 is provided with a third sealing groove 22a. The piston pump 100 also includes a third seal 90, which is embedded in the third sealing groove 22a. The third seal 90 is used to seal the inner wall of the plug body 22 and the piston chamber 10a. The third seal 90 can provide a more reliable sealing effect and reduce the leakage of clothing treatment agent into the part of the piston chamber 10a where the guide body 21 is located.

[0193] Multiple third sealing grooves 22a can be provided, and these grooves are arranged at intervals along the axial direction of the piston cavity 10a. Multiple third sealing elements 90 are embedded in these grooves, forming a multi-layered sealing barrier. This design significantly enhances the sealing effect, effectively preventing the laundry detergent from leaking to the second end of the pump body 10 under high pressure or during long-term use. The multiple third sealing elements 90 also provide a more reliable sealing effect.

[0194] Please continue reading. Figure 14 and Figure 15 In some embodiments, the guide body 21 is provided with a first guide portion 211, which is located on the central axis of the guide body 21. The inner wall of the piston cavity 10a is provided with an axially extending first guide rail 1111. The axially extending first guide rail 1111 provides stable guidance and enhances the reliability of the piston 20 sliding. The first guide portion 211 slides in the first guide rail 1111, ensuring that the piston 20 moves linearly along the axial direction in the piston cavity 10a, thereby improving the accuracy and stability of the movement.

[0195] Understandably, the first guide rail 1111 includes a first guide rail portion and a second guide rail portion, which are arranged in parallel. The first guide portion 211 slides between the first guide rail and the second guide rail, and the first guide rail portion and the second guide rail portion provide a stable sliding path.

[0196] When the assembly part 221 is configured as a slotted section, the slotted section design allows assembly tools (such as screwdrivers) to easily engage with the assembly part 221, enabling rapid assembly of the piston 20. The length direction of the slotted section is perpendicular to the extension direction of the first guide part 211, and the central axis of the first guide rail is located in the vertical plane containing the axial direction of the piston cavity 10a. This perpendicular relationship helps ensure that when assembling the slotted section, the first guide part 211 can also be smoothly aligned and assembled with the first guide rail 1111, thereby improving assembly efficiency and accuracy.

[0197] Furthermore, the inner wall of the piston cavity 10a is also provided with a second guide rail 1112 and a third guide rail 1113 arranged opposite to each other. The second guide rail 1112 and the third guide rail 1113 both extend along the axial direction of the piston cavity 10a. The guide body 21 is also provided with a second guide portion 212 and a third guide portion 213. The second guide portion 212 and the third guide portion 213 are respectively located on both sides in the width direction of the guide body 21. The second guide portion 212 and the third guide portion 213 are slidably connected in the second guide rail 1112 and the third guide rail 1113, which can ensure that the linear movement of the piston 20 along the axial direction in the piston cavity 10a is more accurate and stable. Moreover, the second guide portion 212 and the third guide portion 213 can limit the circumferential deflection of the piston 20 in the piston cavity 10a, enhance the piston 20's ability to resist lateral forces, and maintain the linearity and stability of the movement.

[0198] To facilitate smoother sliding of the piston 20 within the piston cavity 10a, a lubricating medium can be applied to the inner wall of the piston cavity 10a to reduce direct contact and decrease wear on the piston 20. The guide body 21 is also equipped with two oil reservoirs 21a, located adjacent to the second guide section 212 and the third guide section 213 along the axial direction of the piston cavity 10a. The oil reservoirs 21a collect the lubricating medium within the piston cavity 10a. Excessive lubricating medium in the piston cavity 10a can lead to blockage; therefore, it is necessary to reduce the resistance caused by lubricating medium accumulation. The oil reservoirs 21a effectively collect excess lubricating medium as the second guide section 212 and the third guide section 213 move, and when overflowing, are effectively redistributed with the movement of the piston 20.

[0199] In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0200] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting 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 this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0201] In the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0202] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0203] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A piston pump, characterized in that, include: The pump body is a one-piece structure with a piston chamber; A piston is disposed in the piston cavity in a manner that allows it to reciprocate slidably along the axial direction of the piston cavity; A drive assembly is connected to the pump body, and a portion of the drive assembly extends into the piston chamber to drive the piston to reciprocate. as well as The pump head, connected to the pump body, has an outlet and an inlet, both of which are connected to the piston chamber.

2. The piston pump according to claim 1, characterized in that, Along the sliding direction of the piston, the pump body has a first end near the pump head and a second end away from the pump head; The piston chamber has a communication port that passes through the first end of the pump body. The piston is assembled in the piston chamber through the communication port. The liquid outlet and the liquid inlet are also connected to the piston chamber through the communication port. The drive assembly is located closer to the second end than the first end.

3. The piston pump according to claim 2, characterized in that, The second end is provided with a leakage hole, which is connected to the piston cavity.

4. The piston pump according to claim 1, characterized in that, The driving component includes: Motor housing, having a motor cavity; and An electric motor is assembled in the motor cavity, and the motor is used to drive the piston to reciprocate. The inner wall of the motor housing and the outer wall of the motor are fitted with a latch, which engages with the other of the inner wall of the motor housing and the outer wall of the motor, so that the motor is confined within the motor cavity.

5. The piston pump according to claim 4, characterized in that, Multiple buckles are provided, and the multiple buckles are arranged at intervals along the inner wall surface of the motor housing.

6. The piston pump according to claim 4, characterized in that, The inner wall of the motor housing has the buckle, and the buckle has a first guide surface that slides with the motor. The first guide surface gradually tilts towards the central axis of the motor along the direction in which the motor is inserted into the motor cavity.

7. The piston pump according to claim 4, characterized in that, The buckle also has a second guide surface that slides with the motor, and the second guide surface gradually tilts toward the central axis of the motor along the direction in which the motor moves out of the motor cavity.

8. The piston pump according to claim 4, characterized in that, The motor housing is provided with a wire hole, which connects to the motor cavity and is used to lead out the power cable of the motor from the motor cavity.

9. The piston pump according to claim 4, characterized in that, The pump body includes: Pump housing, having the piston chamber; and A motor mount is connected to the pump column housing. The motor mount has a mounting cavity, and the bottom wall of the mounting cavity has a through hole communicating with the piston cavity. The drive assembly is partially inserted through the mounting cavity and the through hole to connect with the piston.

10. The piston pump according to claim 9, characterized in that, The motor mount includes: The base body is connected to the pump column housing; and The mounting plate is connected to the base body, has a first fixing hole, and forms the mounting cavity with the base body; The motor housing has a second fixing hole, and the piston pump also includes a fixing member that passes through the first fixing hole and the second fixing hole.

11. The piston pump according to claim 10, characterized in that, The outer wall of the motor housing is provided with a clearance groove, which extends along the axial direction of the motor. The second fixing hole is located on the extension path of the clearance groove, and the clearance groove is used to avoid the fixing member inserted into the second fixing hole.

12. The piston pump according to claim 10, characterized in that, One of the mounting plate and the motor is provided with a limiting protrusion, and the other of the mounting plate and the motor is provided with a limiting hole, and the limiting protrusion is inserted into the limiting hole.

13. The piston pump according to claim 12, characterized in that, The motor housing also has a groove, which is disposed on the cavity wall of the motor cavity and communicates with the motor cavity; The motor is provided with a connecting lug, which is engaged in the groove; The connecting ear has the limiting hole, and the mounting plate is provided with the limiting protrusion.

14. The piston pump according to claim 13, characterized in that, At least a portion of the limiting protrusion has a gap with the wall of the limiting hole.

15. The piston pump according to claim 13, characterized in that, The motor housing is provided with a support lug, which is disposed opposite to the connecting lug. The support lug has a second fixing hole, and the connecting lug has a third fixing hole. The third fixing hole and the limiting hole are arranged at intervals. The fixing member is sequentially inserted through the second fixing hole, the third fixing hole, and the first fixing hole.

16. The piston pump according to claim 10, characterized in that, The inner peripheral wall of the motor cavity has a foolproof groove; the mounting plate is provided with a foolproof part adapted to the foolproof groove, and the foolproof part is embedded in the foolproof groove.

17. The piston pump according to claim 10, characterized in that, The pump body also includes: Support ribs are connected to the outer peripheral wall of the base body and the outer surface of the mounting plate opposite to the motor.

18. The piston pump according to claim 10, characterized in that, The driving component also includes: A bushing is fitted onto the motor shaft of the motor and is rotatably disposed within the mounting cavity. A drive part is eccentrically disposed on the side of the bushing away from the motor. The drive part passes through the through hole and is connected to the piston. The bushing has a convex ring on its outer peripheral wall, the diameter of which is larger than the diameter of the through hole, so that the convex ring abuts against the bottom wall of the mounting cavity.

19. The piston pump according to claim 1, characterized in that, The pump head is provided with a first anti-fool notch, and the pump body is provided with a second anti-fool notch, with the first anti-fool notch corresponding to the second anti-fool notch.

20. The piston pump according to claim 19, characterized in that, The pump head includes: The pump cover is provided with an inlet channel communicating with the inlet port and an outlet channel communicating with the outlet port; and A valve plate, located between the pump cover and the pump body, has the liquid inlet and the liquid outlet; The valve plate is provided with a first anti-fool notch that penetrates the valve plate along its thickness direction, and the pump cover is provided with a third anti-fool notch that penetrates the pump cover along its thickness direction and corresponds to the first anti-fool notch.

21. The piston pump according to claim 20, characterized in that, The valve plate is a rectangular plate, and the first anti-fooling notch is located at one corner of the valve plate.

22. The piston pump according to claim 20, characterized in that, The pump body includes: Pump column housing, having the piston chamber and the second foolproof notch; and A motor mount is connected to the pump column housing. The motor mount has a mounting cavity, and the bottom wall of the mounting cavity has a through hole communicating with the piston cavity. The drive assembly is partially inserted through the mounting cavity and the through hole to connect with the piston.

23. The piston pump according to claim 22, characterized in that, The pump column housing includes: The shell body has the piston cavity; A connecting plate, connected to the first end of the shell body, has the second foolproof notch; and Multiple spaced-apart first connecting portions are connected to the outer edge of the connecting plate, and each connecting portion has a first connecting hole; The pump cover is provided with a second connecting part, which is disposed opposite to the first connecting part. The second connecting part has a second connecting hole. The piston pump also includes a connector, which is inserted into the first connecting hole and the second connecting hole to fix the pump cover to the connecting plate.

24. The piston pump according to claim 23, characterized in that, The pump cover has multiple connecting grooves, and each of the multiple connecting grooves corresponds to a multiple of the second connecting parts. The first connecting part passes through the connecting groove so that the end face of the first connecting part fits with the end face of the second connecting part.

25. The piston pump according to claim 23, characterized in that, The outer edge of the valve plate has multiple limiting notches, which are matched with a portion of the outer peripheral wall of the first connecting part.

26. The piston pump according to claim 23, characterized in that, The pump cover has a receiving groove on the side facing the connecting plate, and the valve plate is at least partially located in the receiving groove; One of the pump cover and the connecting plate is provided with a fastening part, and the other of the pump cover and the connecting plate is provided with a fastening hole, and a portion of the fastening part is fastened into the fastening hole.

27. The piston pump according to claim 26, characterized in that, The connecting plate is provided with the fastening part, and the fastening part has a first guide slope; The pump cover is provided with the fastening hole, which has a second guide slope. During the process of the fastening part being fastened into the fastening hole, the fastening part slides and abuts against the second guide slope through the first guide slope.

28. The piston pump according to claim 23, characterized in that, The connecting plate has a first sealing groove and a connecting port, the connecting port communicating with the piston chamber, and the first sealing groove is arranged around the periphery of the connecting port; wherein, the piston pump further includes: The first sealing element is embedded in the first sealing groove, and the first sealing element is used to seal the connection between the connecting plate and the valve plate.

29. The piston pump according to claim 28, characterized in that, The valve plate has an annular first sealing part on the side facing the connecting plate. The first sealing part presses the first sealing member in the direction of the first sealing groove to press the first sealing member against the bottom wall of the first sealing groove.

30. The piston pump according to claim 28, characterized in that, The connecting plate is provided with multiple weight-reducing grooves, which are arranged at intervals along the outer periphery of the first sealing groove.

31. The piston pump according to claim 1, characterized in that, The pump head includes: Pump cover, connected to the pump body; and A valve plate is located between the pump cover and the pump body, and has a liquid outlet and a liquid inlet that are both connected to the piston chamber; Wherein, at least one of the valve plate and the pump cover is provided with a foolproof hole, and at least the other of the valve plate and the pump cover is provided with a foolproof protrusion, the foolproof protrusion being inserted into the foolproof hole.

32. The piston pump according to claim 31, characterized in that, The pump cover is provided with a snap-fit ​​hole, and the valve plate includes: The plate body has the liquid inlet and the liquid outlet arranged at intervals; and The cantilever hook has one end connected at an angle to the plate body and the other end fastened to the snap-fit ​​hole.

33. The piston pump according to claim 32, characterized in that, The cantilever hook includes: A connector, one end of which is connected to the plate body and extends toward the pump cover, passes through the snap-fit ​​hole; and The hooking part is connected to the other end of the plug-in part and hooks with the outer wall surface of the pump cover.

34. The piston pump according to claim 32, characterized in that, Two cantilever hooks are provided, and the two cantilever hooks are arranged diagonally. Two anti-mistake protrusions are provided, and the two anti-mistake protrusions are arranged diagonally. The two cantilever hooks and the two anti-fouling protrusions are located at the four corners of the plate body, respectively.

35. The piston pump according to claim 32, characterized in that, The pump cover is provided with an inlet channel communicating with the inlet port and an outlet channel communicating with the outlet port; the pump cover includes: The cover body has an interconnected receiving groove and a second sealing groove. The receiving groove contains the plate body. The outlet of the liquid inlet channel is located on the bottom wall of the receiving groove and communicates with the liquid inlet. The inlet of the liquid outlet channel is located on the bottom wall of the receiving groove and communicates with the liquid outlet. The second sealing groove is arranged around the outlet of the liquid inlet channel and the inlet of the liquid outlet channel. The piston pump also includes: The second sealing element is embedded in the second sealing groove. The second sealing element is used to seal the connection between the cover body and the plate body, so as to seal the connection between the outlet of the liquid inlet channel and the liquid inlet, and to seal the connection between the inlet of the liquid outlet channel and the liquid outlet.

36. The piston pump according to claim 35, characterized in that, The valve plate also includes: The second sealing part is connected to the side of the plate body facing the second sealing groove. The second sealing part presses the second sealing member in the direction of the second sealing groove to press the second sealing member against the bottom wall of the second sealing groove.

37. The piston pump according to claim 35, characterized in that, The second seal includes a first sealing portion and a second sealing portion that are interconnected as one unit. The first sealing portion is arranged around the inlet of the liquid outlet channel, and the second sealing portion is arranged around the outlet of the liquid inlet channel.

38. The piston pump according to claim 32, characterized in that, The piston pump also includes: A liquid inlet check valve, connected to the plate body and used to open and close the liquid inlet; and An outlet check valve is connected to the side of the plate body opposite to the inlet check valve and is used to open and close the outlet.

39. The piston pump according to claim 38, characterized in that, The valve plate also includes: A first stop is connected to one side of the plate body and is disposed adjacent to the liquid inlet; and The second stop is connected to the other side of the plate body, is disposed opposite to the first stop, and is disposed adjacent to the liquid outlet; The first stop portion is located within the projection of the inlet check valve on the plate body, and the second stop portion is located within the projection of the outlet check valve on the plate body.

40. The piston pump according to claim 1, characterized in that, The pump head has a first mounting hole, and the pump body has two second mounting holes. Both the first and second mounting holes are used for assembly with the laundry detergent box. The projection of the first mounting hole along the axial direction of the piston cavity falls between the two second mounting holes, and the line connecting the two second mounting holes is set at an angle to the axial direction of the piston cavity.

41. The piston pump according to claim 40, characterized in that, The piston chamber passes through the center of the first mounting hole in the axial direction.

42. The piston pump according to claim 40, characterized in that, The two second mounting holes are arranged symmetrically along the vertical plane containing the axial direction of the piston cavity.

43. The piston pump according to claim 40, characterized in that, The pump body includes: Pump housing having the piston chamber; A motor mount, connected to the pump column housing, the motor mount having a mounting cavity, the bottom wall of the mounting cavity having a through hole communicating with the piston cavity, a portion of the drive assembly passing through the mounting cavity and the through hole to connect with the piston; and Two mounting bases are respectively connected to both sides of the pump column housing, located between the pump head and the motor base along the axial direction of the piston chamber, and each mounting base has at least one second mounting hole.

44. The piston pump according to claim 43, characterized in that, The mounting base also has positioning holes, which are arranged at intervals with the second mounting hole, and the positioning holes are used to achieve pre-positioning with the clothing treatment agent box.

45. The piston pump according to claim 40, characterized in that, The pump head includes: The pump cover is provided with an inlet channel communicating with the inlet port and an outlet channel communicating with the outlet port; and A valve plate, located between the pump cover and the pump body, has the liquid inlet and the liquid outlet; The first assembly hole is provided in the pump cover and is located between the liquid inlet channel and the liquid outlet channel.

46. ​​The piston pump according to claim 45, characterized in that, The pump cover includes: The cover body has a receiving groove for accommodating the valve plate; Both the inlet pump nozzle and the outlet pump nozzle are connected to the side of the cover body opposite to the receiving groove. The inlet pump nozzle has the inlet channel, and the outlet pump nozzle has the outlet channel; and A bridging plate is connected to the inlet pump nozzle and the outlet pump nozzle, and is located between the inlet pump nozzle and the outlet pump nozzle. The bridging plate has the first mounting hole.

47. The piston pump according to claim 46, characterized in that, The bridging plate includes: A first plate, connected to the cover body, extends in a direction away from the receiving groove; and The second plate is stacked on top of the first plate; The first assembly hole penetrates through the first plate and the second plate.

48. The piston pump according to claim 46, characterized in that, The cover body, the inlet pump nozzle, the outlet pump nozzle, and the bridging plate are integrally formed.

49. The piston pump according to claim 1, characterized in that, The piston chamber has a communication port that extends through one end of the pump body. The piston has an assembly part on the side facing the communication port. The assembly part is used to cooperate with an external assembly tool so that the piston is installed in the piston chamber.

50. The piston pump according to claim 49, characterized in that, The assembly part is one of an internal hexagonal groove, a slotted groove, or a cross groove.

51. The piston pump according to claim 49, characterized in that, The piston includes: The guide body slides in contact with the inner wall of the piston cavity; A plug body, connected to the end of the guide body, having the mounting portion, and the cross-sectional area of ​​the plug body being larger than the cross-sectional area of ​​the guide body; and A reinforcing rib is connected to the guide body and the plug body.

52. The piston pump according to claim 51, characterized in that, The outer peripheral wall of the plug body is provided with a third sealing groove, and the piston pump further includes: The third sealing element is embedded in the third sealing groove, and the third sealing element is used to seal the inner wall of the plug body and the piston cavity.

53. The piston pump according to claim 51, characterized in that, The guide body is provided with a first guide portion, and the inner wall of the piston cavity is provided with an axially extending first guide rail, and the first guide portion is slidably disposed in the first guide rail.

54. The piston pump according to claim 53, characterized in that, The assembly part is a slotted groove, the length direction of which is perpendicular to the extension direction of the first guide part, and the central axis of the first guide part is located in the vertical plane containing the axial direction of the piston cavity.

55. The piston pump according to claim 51, characterized in that, The inner wall of the piston chamber is also provided with a second guide rail and a third guide rail arranged opposite to each other, and the second guide rail and the third guide rail are both extended along the axial direction of the piston chamber. The guide body is further provided with a second guide portion and a third guide portion, which are located on both sides of the guide body, and are slidably connected to the second guide rail and the third guide rail, respectively.

56. The piston pump according to claim 55, characterized in that, The guide body is provided with two oil storage tanks. Along the axial direction of the piston cavity, the two oil storage tanks are respectively arranged adjacent to the second guide part and the third guide part. The oil storage tanks are used to collect the lubricating medium in the piston cavity.

57. A garment processing device, characterized in that, include: The main body includes a housing and a cylindrical assembly disposed within the housing; A laundry detergent dispenser, having a liquid storage chamber, is disposed on the housing; as well as The piston pump according to any one of claims 1-56, wherein the piston pump is connected to the laundry detergent box, the inlet is connected to the storage chamber, and the outlet is connected to the cylinder assembly.

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