A dispensing pump, a water path switching device for a washing apparatus, and a washing apparatus

Abstract

This invention relates to the field of washing equipment technology, specifically providing a dispensing pump, a water circuit switching device, and a washing device for washing equipment. The aim is to solve the problem of leakage from the dispensing pump to the outside due to poor piston sealing during the pumping process of existing dispensing pumps. To this end, the dispensing pump of this invention includes an inlet and an outlet. The inlet is connected to the front water circuit of the washing equipment, and the outlet is connected to the rear water circuit. The dispensing pump also includes a return hole and a return pipe, one end of which is connected to the return hole, and the other end is connected to either the front or rear water circuit of the washing equipment. By providing a return hole and a return pipe on the dispensing pump, when leakage occurs due to poor piston sealing, the leaked liquid will flow back from the return hole along the return pipe to the front or rear water circuit of the washing equipment, preventing leakage from the dispensing pump to the outside.

Description

Technical Field

[0001] This invention relates to the field of washing equipment technology, and specifically provides a dispensing pump, a water circuit switching device, and washing equipment for use in washing equipment. Background Technology

[0002] In daily life, people have many refined and differentiated needs when washing various types of clothing. Therefore, existing washing machines often contain multiple water circuits, each designed to meet different water supply requirements. Water is pumped from different circuits using a pump. To enable switching between water circuits, existing washing machines are often equipped with a water circuit switching valve. This valve is connected to the motor, which controls the opening and closing of the valve.

[0003] However, existing feed pumps frequently experience leakage due to poor piston sealing during the pumping process. The leaked liquid remains outside the washing machine's water circuit and thus does not enter the washing drum, but instead flows onto nearby components, such as the motor. This can potentially cause short circuits or corrosion of the motor's electrical components. Therefore, preventing leakage from the feed pump is a pressing technical problem that needs to be solved in this field.

[0004] In view of this, there is a need in the art for a new dosing pump, water circuit switching device and washing equipment for washing equipment to solve the existing problems. Summary of the Invention

[0005] The present invention aims to solve the above-mentioned technical problem, namely, to solve the problem that existing pumps often leak water to the outside due to poor piston sealing during the pumping process.

[0006] In a first aspect, the present invention provides a dispensing pump for a washing device, the dispensing pump including an inlet and an outlet, the inlet being connected to the front water passage of the washing device, the outlet being connected to the rear water passage of the washing device, the dispensing pump also being provided with a return hole, the dispensing pump further including a return pipe, one end of the return pipe being connected to the return hole, and the other end being connected to the front or rear water passage of the washing device.

[0007] In the specific embodiment of the dispensing pump for washing equipment described above, the dispensing pump includes a pump housing and an end cap. The end cap is provided with a second buckle, and the pump housing is provided with a second snap-fit ​​protrusion. The second buckle and the second snap-fit ​​protrusion cooperate to realize the detachable connection between the end cap and the pump housing.

[0008] In the specific embodiment of the above-mentioned dispensing pump for washing equipment, the return hole is provided on the end cover, one end of the return pipeline is connected to the end cover, and the other end is connected to the front water circuit or the rear water circuit of the washing equipment, and an end cover sealing ring is provided between the end cover and the pump housing.

[0009] In the specific embodiment of the dispensing pump for the washing equipment described above, a piston is provided inside the pump casing of the dispensing pump. The piston includes a connecting part, and the connecting part is provided with a sliding groove for connecting to a driving device. Alternatively, a sliding protrusion is provided on the connecting part, and a slide is provided on the pump casing. The sliding protrusion cooperates with the slide to make the piston slide along the slide.

[0010] In the specific embodiment of the dispensing pump for the washing equipment described above, a piston is provided inside the pump casing of the dispensing pump. The piston also includes a water pumping part, which includes water pumping vanes arranged at intervals. A piston sealing ring is provided in the gap between the water pumping vanes, and at least one end of the piston sealing ring is configured as a bifurcated shape.

[0011] In a second aspect, the present invention also provides a water circuit switching device for a washing device, the water circuit switching device including a dispensing pump for a washing device as described in any of the above embodiments, the water circuit switching device further including: a switcher, the switcher being connected to the water circuit of the washing device and used for switching the water circuit; a drive assembly, the drive assembly being drivenly connected to the switcher and the dispensing pump respectively, and the drive assembly being configured to drive the switcher to switch the water circuit in a first state, and drive the dispensing pump to pump liquid in the water circuit in a second state.

[0012] In the specific embodiment of the water circuit switching device for the washing equipment described above, the driving component is a driving motor, a first paddle is fixedly mounted on the output shaft of the driving motor, and a first gear that can rotate relative to the output shaft is sleeved on the output shaft of the driving motor. The first gear is provided with a first slot. The switcher includes a second gear, and the first gear and the second gear are meshed and connected. When the driving motor rotates forward, the first paddle abuts against the first slot and drives the first gear and the second gear to rotate. When the driving motor rotates in reverse, the first paddle does not abut against the first slot.

[0013] In the specific embodiment of the water circuit switching device for the washing equipment described above, a second paddle is fixedly installed on the output shaft of the drive motor, and a transmission rod that can rotate relative to the output shaft is sleeved on the output shaft of the drive motor. The transmission rod is driven and connected to the dispensing pump. A second slot is provided on the transmission rod. When the drive motor reverses, the second paddle abuts against the second slot and drives the transmission rod to rotate. When the drive motor rotates forward, the second paddle does not abut against the second slot.

[0014] In a specific embodiment of the water circuit switching device for the washing equipment described above, the dispensing pump includes a pump housing and a piston disposed inside the pump housing. A cam is provided at the end of the transmission rod, a lever is provided on the cam, and a groove is provided on the piston. The lever and the groove cooperate to make the piston reciprocate within the pump housing, and / or, a cam sealing ring is provided between the cam and the dispensing pump, and at least one end of the cam sealing ring is configured as a bifurcated form.

[0015] In the specific embodiment of the water circuit switching device for the washing equipment described above, the dispensing pump includes a pump housing and a mounting plate connected to the pump housing, the drive motor includes a motor housing, the mounting plate is provided with a mounting protrusion, a torsion spring is sleeved on the mounting protrusion, the transmission rod is provided with a limiting protrusion, when the drive motor rotates forward, the torsion spring abuts against the limiting protrusion, and / or, the mounting plate is provided with a first buckle, the motor housing is provided with a first engaging protrusion, the first buckle and the first engaging protrusion cooperate to realize the detachable connection between the mounting plate and the motor housing, and / or, the mounting plate is provided with a first mounting hole, the motor housing is provided with a second mounting hole, the second mounting hole is provided with a thread, the mounting plate and the motor housing are installed and fixed through the first mounting hole and the second mounting hole.

[0016] In a third aspect, the present invention also provides a washing device, characterized in that the washing device includes a water path switching device for washing devices as described in any of the above embodiments.

[0017] The technical effect of this invention is as follows: During the operation of the dispensing pump for washing equipment, since a return hole and a return pipe connected to the return hole are provided on the dispensing pump, when leakage occurs inside the dispensing pump due to poor sealing of the piston, the leakage will flow back from the return hole along the return pipe to the front or rear water circuit of the washing equipment, thereby preventing leakage from seeping out of the dispensing pump. This solves the problem that existing dispensing pumps often leak to the outside due to poor sealing of the piston inside the pump during the process of pumping water into the water circuit.

[0018] Solution 1: A dispensing pump for a washing device, the dispensing pump including an inlet and an outlet, the inlet being connected to the front water passage of the washing device, and the outlet being connected to the rear water passage of the washing device, characterized in that the dispensing pump is further provided with a return hole, the dispensing pump further including a return pipe, one end of the return pipe being connected to the return hole, and the other end being connected to the front or rear water passage of the washing device.

[0019] Option 2, the dispensing pump for washing equipment according to claim 1, characterized in that the dispensing pump includes a pump housing and an end cover, the end cover is provided with a second buckle, the pump housing is provided with a second snap-fit ​​protrusion, and the second buckle and the second snap-fit ​​protrusion cooperate to realize the detachable connection between the end cover and the pump housing.

[0020] Option 3, the dispensing pump for washing equipment according to claim 2, characterized in that the return hole is provided on the end cover, one end of the return pipeline is connected to the end cover, the other end is connected to the front water circuit or the rear water circuit of the washing equipment, and an end cover sealing ring is provided between the end cover and the pump housing.

[0021] Option 4: The dispensing pump for washing equipment according to claim 2, characterized in that a piston is provided inside the pump casing of the dispensing pump, the piston includes a connecting part, the connecting part is provided with a sliding groove connected to the driving device, and / or, a sliding protrusion is provided on the connecting part, a sliding track is provided on the pump casing, the sliding protrusion cooperates with the sliding track to make the piston slide along the sliding track.

[0022] Option 5: The dispensing pump for washing equipment according to claim 2, characterized in that a piston is provided inside the pump casing of the dispensing pump, the piston further includes a water pumping part, the water pumping part includes water pumping vanes arranged at intervals, a piston sealing ring is provided in the gap between the water pumping vanes, and at least one end of the piston sealing ring is configured as a bifurcated form.

[0023] Solution 6: A water circuit switching device for a washing machine, characterized in that the water circuit switching device includes a dispensing pump for a washing machine as described in any one of claims 1-5, and the water circuit switching device further includes: a switcher, the switcher being connected to the water circuit of the washing machine and used for switching the water circuit; a drive assembly, the drive assembly being drivenly connected to the switcher and the dispensing pump respectively, and the drive assembly being configured to drive the switcher to switch the water circuit in a first state, and drive the dispensing pump to pump liquid in the water circuit in a second state.

[0024] Solution 7: The water circuit switching device for washing equipment according to claim 6, characterized in that the driving component is a driving motor, a first paddle is fixedly provided on the output shaft of the driving motor, and a first gear rotatable relative to the output shaft is sleeved on the output shaft of the driving motor, the first gear is provided with a first slot, the switcher includes a second gear, the first gear and the second gear are meshed and connected, when the driving motor rotates forward, the first paddle abuts against the first slot and drives the first gear and the second gear to rotate, when the driving motor rotates in reverse, the first paddle does not abut against the first slot.

[0025] Option 8, the water circuit switching device for washing equipment according to claim 7, characterized in that a second paddle is fixedly provided on the output shaft of the drive motor, a transmission rod that can rotate relative to the output shaft is sleeved on the output shaft of the drive motor, the transmission rod is drivenly connected to the dispensing pump, and a second slot is provided on the transmission rod. When the drive motor reverses, the second paddle abuts against the second slot and drives the transmission rod to rotate. When the drive motor rotates forward, the second paddle does not abut against the second slot.

[0026] Option 9, the water circuit switching device for washing equipment according to claim 8, characterized in that the dispensing pump includes a pump housing and a piston disposed inside the pump housing, a cam is disposed at the end of the transmission rod, a lever is disposed on the cam, a sliding groove is disposed on the piston, the lever and the sliding groove cooperate to cause the piston to reciprocate within the pump housing, and / or, a cam sealing ring is disposed between the cam and the dispensing pump, at least one end of the cam sealing ring is configured as a bifurcated form.

[0027] Option 10: The water circuit switching device for washing equipment according to claim 8, characterized in that the dispensing pump includes a pump housing and a mounting plate connected to the pump housing, the drive motor includes a motor housing, the mounting plate is provided with a mounting protrusion, a torsion spring is sleeved on the mounting protrusion, the transmission rod is provided with a limiting protrusion, when the drive motor rotates forward, the torsion spring abuts against the limiting protrusion, and / or, the mounting plate is provided with a first buckle, the motor housing is provided with a first engaging protrusion, the first buckle and the first engaging protrusion cooperate to realize the detachable connection between the mounting plate and the motor housing, and / or, the mounting plate is provided with a first mounting hole, the motor housing is provided with a second mounting hole, the second mounting hole is provided with a thread, the mounting plate and the motor housing are installed and fixed through the first mounting hole and the second mounting hole.

[0028] Solution 11: A washing device, characterized in that the washing device includes a water path switching device for the washing device as described in any one of claims 6-10. Attached Figure Description

[0029] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0030] Figure 1 This is a front view of the waterway switching device of the present invention;

[0031] Figure 2 This is a schematic diagram of the pump casing and mounting plate;

[0032] Figure 3 This is a schematic diagram of a piston;

[0033] Figure 4 This is a left view of the waterway switching device;

[0034] Figure 5 This is a schematic diagram showing the mounting plate with protrusions and torsion springs installed. Figure 5 yes Figure 4 Point A in the middle;

[0035] Figure 6 This is a schematic diagram of the end cap;

[0036] Figure 7 This is a schematic diagram of the motor housing;

[0037] Figure 8 This is a schematic diagram of the water circuit switching device after removing the pump casing and motor casing;

[0038] Figure 9 This is a connection diagram showing the relationship between the drive motor, the dispensing pump, and the switch. Figure 9 yes Figure 8 Point B in the middle;

[0039] Figure 10 This is a diagram of the first and second paddles;

[0040] Figure 11 This is a schematic diagram of the first card slot;

[0041] Figure 12 This is a diagram of the second card slot.

[0042] Figure 13 This is a top view of the waterway switching device;

[0043] Figure 14 This is a cross-sectional view of the waterway switching device, in which Figure 14 yes Figure 13 CC in the middle;

[0044] Figure 15This is a magnified view of a portion of the piston seal, end cap seal, and cam seal. Figure 15 yes Figure 14 Point D in the diagram.

[0045] List of reference numerals in the attached diagram:

[0046] 1. Water circuit switching device; 11. Switcher; 12. Dispensing pump; 121. Pump housing; 1211. Second snap-fit ​​protrusion; 1212. Slide rail; 122. Piston; 1221. Sliding protrusion; 1222. Pumping section; 1223. Pumping vane; 1224. Piston sealing ring; 1225. Connecting part; 123. Slide groove; 124. Mounting plate; 1241. Mounting protrusion; 1242. Torsion spring; 1243. First snap-fit; 1244. First mounting hole; 125. End cap; 1251. Second snap-fit; 1252. Return fluid hole; 1253. Return fluid pipeline; 126. End cap sealing ring; 13. Drive motor; 131. Motor housing; 1311. First snap-fit ​​protrusion; 1312. Second mounting hole; 14. First paddle; 15. First gear; 16. First slot; 17. Second gear; 18. Second paddle; 19. Transmission rod; 191. Cam; 192. Paddle lever; 193. Limiting protrusion; 194. Cam sealing ring; 20. Second slot; 21. Third gear; 22. Fourth gear; 23. Crankshaft. Detailed Implementation

[0047] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the invention and are not intended to limit the scope of protection of the invention. Those skilled in the art can make adjustments as needed to adapt to specific applications.

[0048] It should be noted that in the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] like Figures 1-15 As shown, to address the problem of leakage from the existing dispensing pump 12 to the outside due to poor sealing of the piston 122 during the pumping process, the dispensing pump 12 for washing equipment of the present invention includes an inlet and an outlet (not shown in the figure). The inlet is connected to the front water circuit of the washing equipment, and the outlet is connected to the rear water circuit of the washing equipment. The dispensing pump 12 includes a pump housing 121 and an end cap 125. The end cap 125 is provided with a return hole 1252. The dispensing pump 12 also includes a return pipe 1253. One end of the return pipe 1253 is connected to the return hole 1252 on the end cap 125, and the other end is connected to the front or rear water circuit of the washing equipment. A second latch 1251 is provided on the end cap 125, and a second engaging protrusion 1211 is provided on the pump housing 121. The second latch 1251 and the second engaging protrusion 1211 cooperate to achieve a detachable connection between the end cap 125 and the pump housing 121, and an end cap sealing ring 126 is provided between the end cap 125 and the pump housing 121. A piston 122 is provided inside the pump housing 121 of the dispensing pump 12. The piston 122 includes a connecting part 1225, and the connecting part 1225 is provided with a sliding groove 123 for connecting to the driving device. A sliding protrusion 1221 is provided on the connecting part 1225, and a slide 1212 is provided on the pump housing 121. The sliding protrusion 1221 cooperates with the slide 1212 to allow the piston 122 to slide along the slide 1212. The piston 122 also includes a water pumping section 1222, which includes water pumping vanes 1223 spaced apart. A piston sealing ring 1224 is provided in the gap between the water pumping vanes 1223, and at least one end of the piston sealing ring 1224 is configured as a bifurcated shape.

[0051] The present invention also provides a water circuit switching device 1 for a washing machine, the water circuit switching device 1 for the washing machine comprising:

[0052] The drive assembly is a drive motor 13. A first paddle 14 and a second paddle 18 are fixedly mounted on the output shaft of the drive motor 13. The first paddle 14 is positioned between the main body of the drive motor 13 and the second paddle 18. The first paddle 14 and the second paddle 18 are elastic structures, and abutment surfaces are provided at their ends. A first gear 15 and a transmission rod 19 are also sleeved on the output shaft of the drive motor 13. The first gear 15 is positioned between the main body of the drive motor 13 and the transmission rod 19. A bearing is provided between the first gear 15 and the output shaft to allow the first gear 15 to rotate relative to the output shaft. A first slot 16 is provided on the first gear 15, corresponding to the first paddle 14. The first slot 16 has circumferentially arranged wavy protrusions. A cam 191 is provided at the end of the transmission rod 19, and a lever 192 is provided on the cam 191. The lever 192 can slide within the groove 123 of the piston 122 connecting part 1225. A cam seal ring 194 is provided between the cam 191 and the dispensing pump 12. At least one end of the cam seal ring 194 is bifurcated. A second slot 20 is provided on the transmission rod 19, which corresponds to the second lever 18. The second slot 20 has circumferentially arranged wavy protrusions. When the drive motor 13 rotates forward, the first lever 14 abuts against the protrusions in the first slot 16 and drives the first gear 15 to rotate. The second lever 18 does not abut against the second slot 20, and thus the dispensing pump 12 does not pump water. When the drive motor 13 reverses, the first paddle 14 does not abut against the small protrusion in the first slot 16, and the second paddle 18 abuts against the second slot 20 and drives the transmission rod 19 and the cam 191 set at the end of the transmission rod 19 to rotate. The lever 192 on the cam 191 rotates in the vertical plane and drives the piston 122 to move up and down in the vertical direction through the slide groove 123 to pump the liquid in the water channel.

[0053] A switcher 11 is connected to the water circuit of the washing machine and is used to switch the water circuit. The switcher 11 includes a second gear 17, which meshes with a first gear 15. The switcher 11 also includes a third gear 21 and a fourth gear 22, which mesh with the second gear 17 respectively. The third gear 21 and the fourth gear 22 are also connected to the crankshaft 23 of the switcher 11, which is connected to a piston 122 to control the flow of water. When the drive motor 13 rotates forward, the first paddle 14 abuts against the first slot 16 and drives the first gear 15 and the second gear 17 to rotate. The second gear 17 drives the third gear 21 and the fourth gear 22 to rotate, thereby moving the crankshaft 23 and the piston 122 to control the flow of water. When the drive motor 13 rotates in reverse, the first paddle 14 does not abut against the first slot 16, thus not driving the piston 122 to move, and therefore not affecting the flow of water.

[0054] The advantages of the above-described embodiments are as follows: During the operation of the dispensing pump 12 for the washing equipment of the present invention, since a return hole 1252 and a return pipe 1253 connected to the return hole 1252 are provided on the dispensing pump 12, when leakage occurs inside the dispensing pump 12 due to poor sealing of the piston 122, the leakage will flow back from the return hole 1252 along the return pipe 1253 to the front or rear water circuit of the washing equipment, thereby preventing leakage from seeping out of the dispensing pump 12. This solves the problem that the existing dispensing pump 12 often leaks to the outside due to poor sealing of the piston 122 inside the pump during the process of pumping water into the water circuit. Furthermore, by providing an end cap sealing ring 126 between the end cap 125 and the pump housing 121, a piston sealing ring 1224 within the gap of the pump deflector 1223, and a cam sealing ring 194 between the cam 191 and the dispensing pump 12, along with the return hole 1252 and the return pipe 1253, a sealed chamber with only one opening is formed inside the dispensing pump 12. This ensures that leakage from the dispensing pump 12 can only flow out through the return hole 1252 and the return pipe 1253 on the end cap 125, further preventing leakage from the dispensing pump 12 from seeping outwards. It is worth mentioning that, compared to a stationary component like the end cap 125, sealing moving components like the piston 122 and the cam 191 is more difficult. To address this, the present invention sets at least one end of the piston sealing ring 1224 and the cam sealing ring 194 in a bifurcated form, forming a buffer groove at the bifurcated end of the sealing ring. When the piston 122 or the cam 191 shakes during movement, the buffer groove can provide a certain buffer space, thereby avoiding the situation where the sealing ring shakes and comes into contact with surrounding components, generating greater resistance, while also providing sufficient sealing.

[0055] Furthermore, the water circuit switching device 1 for a washing machine of the present invention, by configuring the drive component to be connected to the switcher 11 and the dispensing pump 12 respectively, allows the switcher 11 to switch water circuits when water circuit switching is required by controlling the drive component to rotate forward. After the water circuit switching is completed, the dispensing pump 12 is driven to deliver the washing dispensing pump 12 from the water circuit into the washing machine to wash the clothes inside. Compared with the prior art where the circuits of the motor and the dispensing pump 12 are set up separately, the present invention integrates the electrical control circuit of the dispensing pump 12 with the drive component. It is only necessary to lead the electrical control circuit of the washing machine to the drive component, and then realize the two functions of water circuit switching and water pumping by controlling the forward and reverse rotation of the drive component. This simplifies the structure of the electrical control circuit. At the same time, the forward and reverse rotation of the drive component also makes the software control logic simpler, solving the problem of complex water circuit switching structure and control logic in existing washing machines.

[0056] Furthermore, regarding the connection method between the first paddle 14 and the first slot 16, and between the second paddle 18 and the second slot 20 mentioned above, in this embodiment, the first paddle 14 and the second paddle 18 are configured as elastic structures. In this way, when the first paddle 14 and the second paddle 18 are not required to abut against the first slot 16 and the second slot 20, since the first paddle 14 and the second paddle 18 are elastic structures, although the small protrusions in the first slot 16 and the second slot 20 will still contact the first paddle 14 and the second paddle 18, the contact will only cause slight elastic deformation of the first paddle 14 and the second paddle 18. This slight elastic deformation will not cause structural damage to the first paddle 14 and the second paddle 18, nor will it generate a large frictional force that would cause a large resistance to the drive of the drive motor 13, thus achieving an ideal transmission effect. Meanwhile, by providing abutment surfaces at the ends of the first paddle 14 and the second paddle 18, the shapes of these abutment surfaces are complementary to the abutment grooves formed by the small protrusions and the first and second slots 16 and 20. Therefore, when the first paddle 14 or the second paddle 18 abuts against the small protrusions within the first and second slots 16 and 20, the abutment surfaces on the first paddle 14 or the second paddle 18 can be embedded into the abutment grooves, thereby making the connection between the first paddle 14 or the second paddle 18 and the first and second slots 16 and 20 more stable. Furthermore, regarding the shapes of the first paddle 14, the second paddle 18, and the small protrusions within the first and second slots 16 and 20, those skilled in the art can set them to other common shapes, as long as they conform to the aforementioned technical principles. These modifications are all within the scope of protection of this invention.

[0057] Furthermore, the dispensing pump 12 includes a pump housing 121 and a mounting plate 124 connected to the pump housing 121. The drive motor 13 includes a motor housing 131. The mounting plate 124 is provided with a mounting protrusion 1241, and a torsion spring 1242 is sleeved on the mounting protrusion 1241. The transmission rod 19 is provided with a limiting protrusion 193. When the drive motor 13 rotates forward, the torsion spring 1242 abuts against the limiting protrusion 193. The mounting plate 124 is provided with a first buckle 1243. The motor housing 131... The mounting plate 124 is provided with a first snap-fit ​​protrusion 1311. The first buckle 1243 cooperates with the first snap-fit ​​protrusion 1311 to realize the detachable connection between the mounting plate 124 and the motor housing 131. The mounting plate 124 is provided with a first mounting hole 1244, and the motor housing 131 is provided with a second mounting hole 1312. The second mounting hole 1312 is provided with a thread. The mounting plate 124 and the motor housing 131 are installed and fixed through the first mounting hole 1244 and the second mounting hole 1312.

[0058] In the above-described embodiment, the first snap-fit ​​1243 on the mounting plate 124 is first snapped onto the first snap-fit ​​protrusion 1311 on the motor housing 131, thus achieving the snap-fit ​​installation of the mounting plate 124 and the motor housing 131. Then, the mounting plate 124 and the motor housing 131 are fixed by fastening bolts through the first mounting hole 1244 and the second mounting hole 1312. Finally, the motor housing 131 is installed onto the main body of the drive motor 13 to complete the installation of the dispensing pump 12 and the drive motor 13. The installation using both snap-fit ​​and fastening bolts improves the connection stability between the dispensing pump 12 and the drive motor 13. Furthermore, although it was mentioned earlier that the second paddle 18 is designed as an elastic structure and will not generate significant friction with the second slot 20, the drive shaft may still rotate slowly under the action of friction, potentially causing the dispensing pump 12 to pump water prematurely. Therefore, in this embodiment, a torsion spring 1242 is also provided on the mounting plate 124. When the drive motor 13 rotates forward, the torsion spring 1242 can abut against the limiting protrusion 193 of the transmission rod 19, thereby limiting the transmission rod 19 and preventing the transmission rod 19 from rotating slowly when the drive motor 13 rotates forward. Furthermore, since the torsion spring 1242 itself has elasticity and the limiting protrusion 193 has a one-way limiting structure, when the drive motor 13 rotates in reverse, the transmission rod 19 rotates under the drive of the second paddle 18, and at this time the torsion spring 1242 will not limit the rotation of the transmission rod 19.

[0059] Furthermore, the dispensing pump 12 includes a pump housing 121 and an end cap 125. The end cap 125 is provided with a second latch 1251, and the pump housing 121 is provided with a second engaging protrusion 1211. The second latch 1251 and the second engaging protrusion 1211 cooperate to achieve a detachable connection between the end cap 125 and the pump housing 121. The end cap 125 is provided with a return fluid hole 1252, which is connected to a return fluid pipe 1253, and the return fluid pipe 1253 is connected to the water circuit of the washing machine.

[0060] The advantages of the above-described embodiment are as follows: By providing a return hole 1252 and a return pipe 1253 connected thereto on the end cover 125, when the dispensing pump 12 leaks, the leaked water can be discharged from the return hole 1252 and the return pipe 1253 and re-enter the washing machine's water circuit. This avoids the problem of leaked water seeping from inside the dispensing pump 12 to the outside, posing a potential safety hazard to the washing machine's electrical circuit. Furthermore, by providing a second snap-fit ​​protrusion 1211 and a second latch 1251 on the pump housing 121 and the end cover 125 respectively, a detachable connection between the pump housing 121 and the end cover 125 is achieved, and it also facilitates easier inspection of the inside of the dispensing pump 12.

[0061] In addition, the present invention also provides a washing device, including the water path switching device 1 for washing devices as described in any of the above embodiments.

[0062] It should be noted that the above embodiments are merely used to illustrate the principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art can adjust the above structure without departing from the principles of the present invention so that the present invention can be applied to more specific application scenarios. Furthermore, although the above description uses a washing machine as an example, those skilled in the art can obviously apply the above solution to other washing equipment, such as washer-dryer combos, all of which are within the scope of protection of the present invention.

[0063] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A dispensing pump (12) for a washing device, the dispensing pump (12) comprising an inlet and an outlet, the inlet being connected to the front water path of the washing device, and the outlet being connected to the rear water path of the washing device, characterized in that, The dispensing pump (12) is also provided with a return hole (1252). The dispensing pump (12) also includes a return pipe (1253). One end of the return pipe (1253) is connected to the return hole (1252), and the other end is connected to the front or rear water circuit of the washing equipment.

2. The dispensing pump (12) for washing equipment according to claim 1, characterized in that, The dispensing pump (12) includes a pump housing (121) and an end cap (125). The end cap (125) is provided with a second buckle (1251), and the pump housing (121) is provided with a second snap-fit ​​protrusion (1211). The second buckle (1251) and the second snap-fit ​​protrusion (1211) cooperate to realize the detachable connection between the end cap (125) and the pump housing (121).

3. The dispensing pump (12) for washing equipment according to claim 2, characterized in that, The return hole (1252) is provided on the end cap (125), one end of the return pipe (1253) is connected to the end cap (125), and the other end is connected to the front water circuit or the rear water circuit of the washing equipment. An end cap sealing ring (126) is provided between the end cap (125) and the pump housing (121).

4. The dispensing pump (12) for washing equipment according to claim 2, characterized in that, The dispensing pump (12) has a piston (122) inside its pump housing (121). The piston (122) includes a connecting part (1225), which has a sliding groove (123) for connecting to a drive device. Alternatively, the connecting part (1225) has a sliding protrusion (1221), and the pump housing (121) has a slide rail (1212). The sliding protrusion (1221) cooperates with the slide rail (1212) to make the piston (122) slide along the slide rail (1212).

5. The dispensing pump (12) for washing equipment according to claim 2, characterized in that, The pump casing (121) of the dispensing pump (12) is provided with a piston (122), and the piston (122) also includes a water pumping part (1222). The water pumping part (1222) includes water pumping vanes (1223) arranged at intervals. A piston sealing ring (1224) is provided in the gap of the water pumping vanes (1223). At least one end of the piston sealing ring (1224) is configured as a bifurcated form.

6. A water circuit switching device (1) for washing equipment, characterized in that, The water circuit switching device (1) includes a dispensing pump (12) for washing equipment as described in any one of claims 1-5, and the water circuit switching device (1) further includes: A switch (11) is connected to the water circuit of the washing equipment and is used to switch the water circuit; The driving component is connected to the switch (11) and the dispensing pump (12) respectively, and the driving component is configured to drive the switch (11) to switch the water path in a first state and drive the dispensing pump (12) to pump the liquid in the water path in a second state.

7. The water circuit switching device (1) for washing equipment according to claim 6, characterized in that, The driving component is a drive motor (13). A first paddle (14) is fixedly mounted on the output shaft of the drive motor (13), and a first gear (15) that can rotate relative to the output shaft is sleeved on the output shaft of the drive motor (13). A first slot (16) is provided on the first gear (15). The switch (11) includes a second gear (17). The first gear (15) and the second gear (17) are meshed and connected. When the drive motor (13) rotates forward, the first paddle (14) abuts against the first slot (16) and drives the first gear (15) and the second gear (17) to rotate. When the drive motor (13) rotates in reverse, the first paddle (14) does not abut against the first slot (16).

8. The water circuit switching device (1) for washing equipment according to claim 7, characterized in that, A second paddle (18) is fixedly mounted on the output shaft of the drive motor (13). A transmission rod (19) that can rotate relative to the output shaft is sleeved on the output shaft of the drive motor (13). The transmission rod (19) is driven and connected to the dispensing pump (12). A second slot (20) is provided on the transmission rod (19). When the drive motor (13) reverses, the second paddle (18) abuts against the second slot (20) and drives the transmission rod (19) to rotate. When the drive motor (13) rotates forward, the second paddle (18) does not abut against the second slot (20).

9. The water circuit switching device (1) for washing equipment according to claim 8, characterized in that, The dispensing pump (12) includes a pump housing (121) and a piston (122) disposed inside the pump housing (121). The end of the transmission rod (19) is provided with a cam (191). A lever (192) is provided on the cam (191). A groove (123) is provided on the piston (122). The lever (192) and the groove (123) cooperate to make the piston (122) reciprocate within the pump housing (121). And / or, a cam seal ring (194) is provided between the cam (191) and the dispensing pump (12). At least one end of the cam seal ring (194) is configured as a bifurcated form.

10. The water circuit switching device (1) for washing equipment according to claim 8, characterized in that, The dispensing pump (12) includes a pump housing (121) and a mounting plate (124) connected to the pump housing (121), and the drive motor (13) includes a motor housing (131). The mounting plate (124) is provided with a mounting protrusion (1241), and a torsion spring (1242) is sleeved on the mounting protrusion (1241). The transmission rod (19) is provided with a limiting protrusion (193). When the drive motor (13) rotates forward, the torsion spring (1242) abuts against the limiting protrusion (193), and / or, The mounting plate (124) is provided with a first buckle (1243), and the motor housing (131) is provided with a first engaging protrusion (1311). The first buckle (1243) and the first engaging protrusion (1311) cooperate to realize the detachable connection between the mounting plate (124) and the motor housing (131), and / or, The mounting plate (124) is provided with a first mounting hole (1244), and the motor housing (131) is provided with a second mounting hole (1312). The second mounting hole (1312) is provided with a thread. The mounting plate (124) and the motor housing (131) are installed and fixed through the first mounting hole (1244) and the second mounting hole (1312).

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