Automatic liquid feeding switching device for intelligent washing machine

Abstract

The application discloses a liquid automatic switching device of an intelligent washing machine, which comprises a base, a cover plate assembly and a driving assembly. The top surface of the base is provided with an inlet liquid switching cavity, an inlet water switching cavity, a first camshaft and a second camshaft. The first and second camshafts are provided with a plurality of recesses which are arranged in a staggered manner. The cover plate assembly is provided with a plurality of inlet liquid nozzles, a plurality of outlet water nozzles and a main inlet water nozzle. The cover plate assembly is internally provided with a liquid collecting channel, a main inlet water cavity and a plurality of outlet water channels. An outlet liquid valve and an outlet water valve are arranged on the first and second camshafts respectively and rotate with the first and second camshafts. The outlet liquid valve and the outlet water valve respectively block or dredge the inlet liquid nozzles and the outlet water channels. The outlet end and the inlet end of a liquid pump are communicated with the liquid collecting channel and the outlet water channel respectively. The driving assembly is used for driving the first and second camshafts to rotate. The application has the advantages of simple structure, small occupied space, low production cost and convenient maintenance and is widely applicable to different models of intelligent washing machines.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent washing machines, and in particular to an automatic liquid dosing switching device for an intelligent washing machine. Background Art

[0002] With the development of technology, smart washing machines can replace manual operation and achieve automatic water filling and detergent dispensing. However, as people's living standards improve, the need to use multiple detergents during the washing process requires the installation of multiple dispensing pumps, resulting in complex washing machine structures and high production and maintenance costs.

[0003] To this end, Chinese utility model patent CN214613149U provides a switcher, including a camshaft, a valve core and a switching valve body, wherein the switching valve body is provided with a plurality of inlets and outlets, wherein a plurality of inlets and outlets are equipped with valve cores, a camshaft is provided in the switching valve body, and a plurality of protrusions corresponding to the inlets and outlets are provided in sequence on the camshaft along its axial direction, and the two adjacent protrusions are staggered at a certain angle. When any protrusion abuts against the corresponding valve core, the control core moves to disengage the blockage of the corresponding inlet or outlet, thereby realizing multi-way switching control of the washing machine.

[0004] However, in the above solution, the inlet and outlet are arranged side by side, the water channel of the washing machine is arranged on both sides of the inlet and outlet, and the design of the water channel connecting the inlet and outlet on the washing machine is complicated, which increases the production cost and maintenance cost of the washing machine.

[0005] In view of this, there is an urgent need to improve the structure of the liquid injection switching device of the washing machine in the prior art to simplify the complexity of the water path of the liquid injection switching device and reduce its production and maintenance costs. Summary of the Invention

[0006] The technical problem to be solved by the present invention is that the existing liquid feeding switching device of a washing machine has a complex structure and high production and maintenance costs.

[0007] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows:

[0008] A liquid dispensing automatic switching device for an intelligent washing machine, comprising:

[0009] The base has a top surface provided with a liquid inlet switching chamber and a water inlet switching chamber separated by a partition, wherein a first camshaft and a second camshaft are respectively provided in the liquid inlet switching chamber and the water inlet switching chamber for rotation, and a plurality of grooves are provided on the outer circumferences of the first camshaft and the second camshaft, and the grooves are staggered;

[0010] a cover plate assembly, disposed on the top surface of the base, the cover plate assembly being provided with a plurality of liquid inlet nozzles, a plurality of water outlet nozzles and a main water inlet nozzle; a liquid collecting channel, a main water inlet cavity and a plurality of water outlet channels being provided in the cover plate assembly; the liquid collecting channel being in communication with the liquid inlet nozzle and the liquid inlet switching cavity; the main water inlet cavity being in communication with the main water inlet nozzle; and the water outlet channel being used to connect the main water inlet cavity and the water outlet nozzle; the liquid collecting channel being in communication with at least one of the water outlet channels;

[0011] a liquid outlet valve and a water outlet valve, respectively provided on the first camshaft and the second camshaft, and as the first camshaft and the second camshaft rotate, the liquid outlet valve and the water outlet valve respectively block or dredge the liquid inlet nozzle and the water outlet channel;

[0012] a liquid pump, the outlet end and the inlet end of which are respectively connected to the liquid collecting channel and the water outlet channel;

[0013] The driving assembly is connected to the first camshaft and the second camshaft through the transmission assembly, and is used to drive the first camshaft and the second camshaft to rotate.

[0014] In the above solution, preferably, the cover plate assembly includes:

[0015] A cover plate is provided with a water inlet partition plate on its top surface, which is used to enclose the liquid outlet channel and the main water inlet chamber; a first pressure relief hole is provided in the main water inlet chamber, and a second pressure relief hole is provided in the water outlet channel, and the water outlet valve connects the main water inlet chamber and the water outlet channel through the first pressure relief hole and the second pressure relief hole;

[0016] A panel is arranged on the top surface of the cover plate; the liquid inlet nozzle, the water outlet nozzle and the water inlet nozzle are arranged on the panel.

[0017] In the above solution, preferably, the liquid outlet valve includes:

[0018] An upper valve seat is arranged in the liquid inlet nozzle, and its outer diameter is adapted to the inner diameter of the liquid inlet nozzle; the upper valve seat is cylindrical, and a liquid inlet hole is provided on its top surface, and an upper liquid leakage hole is provided on its side surface, and the liquid inlet hole and the upper liquid leakage hole are connected to the inner cavity of the upper valve seat;

[0019] The lower valve seat is arranged at the lower end of the upper valve seat, and a lower leakage hole is provided at the center of the bottom surface thereof. A piston bracket is provided in the lower leakage hole, and a piston handle hole is provided at the center of the piston bracket;

[0020] The piston includes a piston head and a piston handle arranged on the bottom surface of the piston head; the piston head is provided with a sealing surface adapted to the liquid inlet hole; the piston handle is arranged in the piston handle hole, and its lower end abuts against the first camshaft; the piston handle is provided with a first return spring.

[0021] In the above scheme, preferably, the lower end of the liquid inlet nozzle is provided with an expanded diameter portion, the upper valve seat is arranged in the expanded diameter portion, a sealing ring is provided on the outer surface of the upper valve seat, and the upper valve seat is provided in sealing contact with the expanded diameter portion through the sealing ring.

[0022] In the above solution, preferably, the water outlet valve includes:

[0023] A diaphragm, a valve core support plate is provided in the water inlet switching chamber, and the diaphragm is arranged on the top surface of the valve core support plate; a valve core groove is provided on the top surface of the diaphragm, a sealing convex shaft is provided in the valve core groove, and the sealing convex shaft and the side wall of the valve core groove form a pressure relief channel; the side surfaces of two adjacent diaphragms are integrally connected;

[0024] a valve core disposed on the top surface of the partition plate, the valve core being provided with a first pressure relief nozzle and a second pressure relief nozzle, the upper ends of the first pressure relief nozzle and the second pressure relief nozzle being respectively disposed in the first pressure relief hole and the second pressure relief hole, and the lower ends thereof being respectively disposed above the pressure relief channel and the sealing convex shaft; a pressure relief cavity being provided on the bottom surface of the valve core, the first pressure relief nozzle and the second pressure relief nozzle being disposed in the pressure relief cavity;

[0025] The bracket includes a support frame and a lifting shaft arranged at the center of the top surface of the support frame, the support frame is sleeved on the second camshaft, and a limit pin is provided on the upper inner part of the support frame, and the limit pin abuts against the second camshaft; the lifting shaft is connected to the sealing cam shaft, and as the second camshaft rotates, the sealing cam shaft is pushed to seal or clear the second pressure relief nozzle; a second return spring is sleeved on the lifting shaft.

[0026] In the above solution, preferably, a sealing gasket is provided between the valve core and the cover plate, and the sealing gasket includes:

[0027] a gasket body, arranged on the top surface of the valve core, and provided with a limiting through hole adapted to the first pressure relief nozzle and the second pressure relief nozzle;

[0028] The support ring is arranged on the outer circumferential surface of the gasket body. The support ring and the gasket body are connected by a connecting ring. The cross section of the connecting ring is U-shaped.

[0029] In the above solution, preferably, a connecting convex ring is provided in the valve core groove, and the inner and outer sides of the connecting convex ring are respectively connected to the side surfaces of the sealing convex shaft and the pressure relief channel.

[0030] In the above solution, preferably, a guide groove is provided on the outer side surface of the support frame, and a guide protrusion adapted to the guide groove is provided in the water inlet switching cavity.

[0031] In the above solution, preferably, the driving assembly includes a driving motor and a driving gear sleeved on a motor shaft of the driving motor;

[0032] The transmission component is a transmission gear or a transmission gear set.

[0033] In the above solution, preferably, a switching state indicating mechanism is further included, including:

[0034] A switching wheel is provided on the driving gear and is coaxial with the driving gear; a plurality of pole claws are provided on the outer circumference of the switching wheel, wherein the pole claws include an initial pole claw, and the width of the initial pole claw is greater than that of the other pole claws;

[0035] A micro switch is arranged on one side of the switching wheel. A rotatable shifting rod is provided on the micro switch, and the shifting rod abuts against the pole claw.

[0036] Compared with the prior art, the automatic liquid dosing switching device for an intelligent washing machine provided by the present invention realizes the integration of the water inlet and detergent inlet channels by means of a liquid inlet switching chamber and a water inlet switching chamber provided in the base, a water inlet valve core for connecting the water inlet nozzle and the liquid inlet nozzle, and a detergent valve core for connecting the liquid inlet nozzle and the liquid inlet switching chamber. This greatly reduces the complexity of the passage of the liquid dosing device of the intelligent washing machine, reduces the volume occupied by the liquid dosing device of the washing machine, makes it adaptable to washing machines of different models, expands the scope of application of the automatic liquid dosing switching device of the washing machine, and reduces the production cost and maintenance difficulty of the automatic liquid dosing switching device of the washing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A perspective view of the automatic liquid dosing switching device of the intelligent washing machine of the present invention;

[0038] Figure 2 This is a schematic diagram of the structure of the automatic liquid feeding switching device of the smart washing machine of the present invention;

[0039] Figure 3 Schematic diagram of the structure of the base in the present invention;

[0040] Figure 4 Schematic diagram of the structure of the cover plate in the present invention;

[0041] Figure 5 Schematic diagram of the structure of the panel in the present invention;

[0042] Figure 6 It is a structural schematic diagram of the liquid outlet valve and the first camshaft in the present invention.

[0043] Figure 7 Schematic diagram of the structure of the liquid outlet valve in the present invention;

[0044] Figure 8 Schematic diagram of the structure of the water outlet valve and the second camshaft in the present invention;

[0045] Figure 9 Schematic diagram of the structure of the water outlet valve in the present invention;

[0046] Figure 10 Schematic diagram of the structure of the transmission assembly and the switching locking mechanism in the present invention;

[0047] Figure 11 A top view of the automatic liquid dosing switching device of the smart washing machine of the present invention;

[0048] Figure 12 for Figure 11 Schematic diagram of the cross section at AA in the middle;

[0049] Figure 13 for Figure 12 Enlarged schematic diagram of point B in the middle.

[0050] in, Figures 1 to 13 The corresponding relationship between the names of the components and the reference numerals is as follows:

[0051] Base 1, cover 2, panel 3, liquid outlet valve 4, water outlet valve 5, liquid pump 6, drive assembly 7, transmission assembly 8, switching state indication mechanism 9,

[0052] Partition 11, liquid inlet switching chamber 12, water inlet switching chamber 13, first camshaft 14, second camshaft 15, groove 16,

[0053] Valve core support plate 131,

[0054] Liquid inlet nozzle 21, liquid collecting channel 22, liquid collecting channel 23, liquid separation partition 24, main water inlet cavity 25, water outlet channel 26,

[0055] The expanded diameter portion 210, the liquid collecting hole 221, the first pressure relief hole 251, the second pressure relief hole 261,

[0056] Main water inlet 31, water outlet 32,

[0057] Upper valve seat 41, lower valve seat 42, piston 43,

[0058] Sealing ring 411, liquid inlet hole 412, upper leakage hole 413, buckle groove 414,

[0059] Lower leakage hole 421, piston bracket 422, piston handle hole 423, buckle position 424,

[0060] Piston head 431, piston handle 432,

[0061] Valve core 51, diaphragm 52, valve core bracket 53, sealing gasket 54,

[0062] The first pressure relief nozzle 511, the second pressure relief nozzle 512, the pressure relief cavity 513,

[0063] Valve core groove 521, sealing convex shaft 522, pressure relief channel 523, connecting convex ring 524,

[0064] Support frame 531, lifting shaft 532, limiting pin 533, guide groove 534,

[0065] Gasket body 541, support ring 542, limiting through hole 543, connecting ring 544,

[0066] Drive motor 71, drive gear 72,

[0067] Switching wheel 91 , micro switch 92 , pole claw 93 , shift lever 94 , initial pole claw 931 . DETAILED DESCRIPTION

[0068] The present invention provides an automatic liquid dosing switching device for an intelligent washing machine. The device has a simple structure, occupies a small space, is widely applicable to various models of intelligent washing machines, and has the advantages of low production cost and easy maintenance. The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0069] like Figure 1 、 Figure 2 As shown, the liquid dosing automatic switching device of the intelligent washing machine provided by the present invention includes a base 1, a cover plate 2, a panel 3, a liquid outlet valve 4, a water outlet valve 5, a liquid pump 6 and a driving component.

[0070] like Figure 3 As shown, the top surface of the base 1 is provided with a liquid inlet switching chamber 12 and a water inlet switching chamber 13, separated by a partition 11. A first camshaft 14 and a second camshaft 15 are rotatably mounted within each of the liquid inlet switching chamber 12 and the water inlet switching chamber 13, respectively. The outer circumferences of the first and second camshafts 14, 15 are provided with a plurality of grooves 16 distributed along their lengths, with the grooves 16 being staggered on the camshafts. The upper end of the liquid inlet switching chamber 12 is open, while the lower end of the water inlet switching chamber 13 is open. A valve core support plate 131 is provided within the water inlet switching chamber 13, along with several sets of guide ribs disposed below the valve core support plate 131 and distributed along the length of the second camshaft 15.

[0071] like Figure 4As shown, the cover plate 2 is disposed on the top surface of the base 1. The cover plate 2 is provided with a plurality of independently arranged liquid inlet nozzles 21 and a liquid collecting channel 22. The liquid inlet nozzles 21 are disposed above the water inlet switching chamber 13. The liquid collecting channel 22 is provided with a liquid collecting hole 221, which is in communication with the liquid inlet switching chamber 12. The cover plate 2 is also provided with a liquid outlet collecting channel 23 that is relatively independent of the liquid collecting channel 22. The liquid collecting channel 22 and the liquid outlet collecting channel 23 are respectively in communication with the inlet and outlet ends of the liquid pump 6. The liquid pump 6 pumps detergent from the liquid collecting channel 22 into the liquid outlet collecting channel 23.

[0072] The cover plate 2 is provided with a main water inlet chamber 25 and a plurality of water outlet channels 26. The main water inlet chamber 25 and the plurality of water outlet channels 26 are separated by a liquid separator 24. The main water inlet chamber 25 and the water outlet channels 26 are respectively provided with a first pressure relief hole 251 and a second pressure relief hole 261. At least one water outlet channel 26 is connected to the liquid outlet collection channel 23.

[0073] like Figure 5 As shown, the panel 3 is arranged on the top surface of the cover plate 2. The panel 3 is provided with a main water inlet nozzle 31 and a plurality of water outlet nozzles 32. The main water inlet nozzle 31 is connected to the water inlet cavity 25. The water outlet nozzles 32 correspond to the water outlet channels 26 one by one and are connected to the water outlet channels 26. The liquid pump 6 is installed on the panel 3.

[0074] like Figure 6 、 Figure 7 、 Figure 11 、 Figure 12 and Figure 13 As shown, the liquid outlet valve 4 is disposed in the liquid inlet switching chamber 12 , and the liquid outlet valve 4 corresponds one-to-one with the liquid inlet nozzle 21 . The liquid outlet valve 4 includes an upper valve seat 41 , a lower valve seat 42 and a piston 43 .

[0075] The lower end of the liquid inlet nozzle 21 is provided with an expanded portion 210, the width of which is greater than that of the liquid inlet nozzle 21. The upper valve seat 41 is disposed within the expanded portion 210, and the outer diameter of the upper valve seat 41 matches the inner diameter of the expanded portion 210. A sealing ring 411 is provided on the outer circumference of the upper valve seat 41, and the upper valve seat 41 is in contact and sealed with the expanded portion 210 via the sealing ring 411. The upper valve seat 41 is cylindrical in shape, with a liquid inlet hole 412 provided at the center of its top surface. An upper liquid leakage hole 413 is provided on the side of the upper valve seat 41. The liquid inlet hole 412 and the upper liquid leakage hole 413 are connected to the inner cavity of the upper valve seat 41. A snap-fit ​​groove 414 is provided at the lower end of the upper valve seat 41.

[0076] The lower valve seat 42 is positioned at the lower end of the upper valve seat 41. A lower leakage hole 421 is defined in the center of the bottom surface of the lower valve seat 42. A piston bracket 422 is positioned within the lower leakage hole 421. A piston handle hole 423 is defined in the center of the piston bracket 422. A snap-fitting portion 424 is provided on the side of the lower valve seat 42, which mates with the snap-fitting groove 414. The snap-fitting portion 424 mates with the snap-fitting groove 414, thereby securely connecting the upper and lower valve seats 41 and 42.

[0077] The piston 43 is disposed within the inner cavity of the upper valve seat 41 and includes a piston head 431 and a piston stem 432. The piston stem 432 is disposed on the bottom surface of the piston head 431. The piston head 431 is provided with a sealing surface that mates with the liquid inlet 412. The piston stem 432 is disposed within the piston stem hole 423 and abuts the first camshaft 14. A first return spring (not shown) is sleeved around the piston stem 432, with its ends abutting against the piston head 431 and the piston support 422, respectively.

[0078] like Figure 8 and Figure 9 As shown, the outlet valve 5 is disposed within the water inlet switching chamber 13 and comprises a valve core 51, a diaphragm 52, and a valve core support 53. The diaphragm 52 is disposed on the top surface of the valve core support plate 131. A valve core groove 521 is defined on the top surface of the diaphragm 52. A sealing protrusion 522 is disposed within the valve core groove 521. The sealing protrusion 522 and the valve core groove 521 form a pressure relief passage 523. A connecting protrusion 524 is disposed within the valve core groove 21. The inner and outer sides of the connecting protrusion 524 are connected to the side surfaces of the sealing protrusion 522 and the pressure relief passage 523, respectively. As the sealing protrusion 522 moves up and down, the connecting protrusion 524 elastically deforms.

[0079] The valve core 51 is mounted on the top surface of the diaphragm 52 and is provided with a first pressure relief nozzle 511 and a second pressure relief nozzle 512. The upper and lower ends of the first pressure relief nozzle 511 are respectively positioned above the first pressure relief hole 251 and the pressure relief channel 523. The upper and lower ends of the second pressure relief nozzle 512 are respectively positioned above the second pressure relief hole 261 and the sealing protrusion 522. A pressure relief cavity 513 is provided on the bottom surface of the valve core 51. The bottom surfaces of the first and second pressure relief nozzles 511, 512 are positioned within the pressure relief cavity 513. The side surfaces of two adjacent diaphragms 52 are integrally connected to prevent displacement or deformation of the diaphragms 52, which could affect the sealing of the water inlet switching chamber 13.

[0080] The valve core bracket 53 is arranged below the valve core support plate 131. The valve core bracket 53 includes a support frame 531 and a lifting shaft 532 arranged at the center of the top surface of the support frame 531. The lifting shaft 532 is connected to the sealing cam 522 and is used to drive the sealing cam 522 to move up and down to block or clear the second pressure relief nozzle 512. A limit pin 533 is provided on the inner top of the support frame 531. The limit pin 533 is arranged below the lifting shaft 532 and is adapted to the groove 16 on the second camshaft 15. Guide grooves 534 are provided on the side surfaces of both sides of the bracket frame 531. The guide grooves 534 are adapted to the guide ridges provided in the water inlet switching chamber 13. A second return spring (not shown) is sleeved on the lifting shaft 532.

[0081] A sealing gasket 54 is installed between the valve core 51 and the cover plate 2. The sealing gasket 54 comprises a gasket body 541 and a support ring 542 disposed on the outer circumference of the gasket body 541. The gasket body 542 is positioned on the top surface of the valve core 51 and is provided with a stopper hole 543 that mates with the first and second pressure relief nozzles 511 and 512. The gasket body 541 is sleeved onto the valve core 51 through the stopper hole 543 to enhance the sealing performance of the valve core support plate 131. The support ring 542 and gasket body 541 are connected by a connecting ring 544. The connecting ring 544 has a U-shaped cross-section, facilitating elastic deformation under water pressure to prevent leakage.

[0082] The driving assembly 7 is used to drive the first camshaft 14 and the second camshaft 15 to rotate. The driving assembly 7 includes a driving motor 71 and a driving gear 72 sleeved on the motor shaft of the driving motor 71.

[0083] The transmission assembly 8 can be a single transmission gear or a transmission gear set composed of multiple transmission gears, which is engaged with the driving gear 72 to transmit the rotation of the driving gear 72 to the first camshaft 14 and the second camshaft 154.

[0084] like Figure 10 As shown, the automatic liquid dispensing switching device also includes a switching state indicator mechanism 9, comprising a switching wheel 91 and a microswitch 92. The switching wheel 91 is mounted coaxially with the drive gear 72. The switching wheel 91 is provided with a plurality of claws 93, which protrude outward from the outer surface of the drive wheel 81. These claws 93 include an initial claw 931, which is wider than the other claws 93. The microswitch 92 is mounted on one side of the switching wheel 91. As the switching wheel 91 rotates, the claw 93 activates the microswitch 92. The microswitch 92 is electrically connected to the control circuit of the drive motor 71. The microswitch 92 is provided with a lever 94, which is rotatably mounted on the microswitch 92. As the drive gear 72 rotates, the lever 94 abuts against the claw 93 or falls into the gap between the claws 93, switching the microswitch 92 on or off.

[0085] The working process of the present invention is as follows:

[0086] 1) Switching of detergent inlet liquid path

[0087] The detergent enters the liquid inlet switching chamber 12 on the base 1 through the connected liquid inlet nozzle 21. The liquid pump 6 works to extract the detergent from the liquid collecting hole 221 connected to the liquid inlet switching chamber 12, and passes through the liquid collecting channel 22 and the liquid pump 6 to the liquid outlet collection channel 23. After being mixed with the water in the liquid outlet collection channel 23, it can be discharged through the liquid outlet channel 23 and the water outlet nozzle 32.

[0088] When the type of detergent needs to be switched, the driving motor 71 drives the first camshaft 14 to rotate through the driving gear 72 and the transmission assembly 8. As the first camshaft 14 rotates, the first camshaft 14 pushes the piston handle 432 of the opened liquid outlet valve 4 to move upward, so that its piston head 431 blocks the liquid inlet nozzle 21; at the same time, the unopened piston handle 432 falls into its corresponding groove 16 under the action of the first return spring, and its corresponding liquid inlet nozzle 21 is connected, and the detergent can enter the liquid inlet switching chamber 12.

[0089] 2) Switching of water outlet path

[0090] The main water inlet pipe is connected with the main water inlet nozzle 31. After the water enters the main water inlet chamber 25 from the main water inlet nozzle 31, it enters the pressure relief chamber 513 in the water outlet valve 5 through the first pressure relief nozzle 511. The limit pin 533 on the valve core bracket 53 falls into the groove on the second camshaft 15 under the action of the second return spring. The sealing cam 522 on the diaphragm 52 does not abut against the second pressure relief nozzle 512 under the action of the water pressure in the pressure relief chamber 513. The main water inlet chamber 25 is connected with the water outlet channel 26 through the pressure relief chamber. The water passes through the first pressure relief nozzle 511, the pressure relief chamber 513, the second pressure relief nozzle 512, and the water outlet channel 26 and is discharged from the water outlet nozzle 32.

[0091] When it is necessary to switch the water outlet liquid path, the driving motor 71 drives the second camshaft 15 to rotate through the driving gear 72 and the transmission assembly 8. As the second camshaft 15 rotates, the second camshaft 15 pushes the limit pin 533 set in the groove 16 to move, driving the lifting shaft 532 of the valve core bracket 53 to move upward, so that the sealing cam 522 on the diaphragm 52 blocks the second pressure relief nozzle 512; at the same time, the valve core bracket 53 of the water outlet valve 5 in the other water outlet channel 26 moves downward, releasing the corresponding second pressure relief nozzle 512 to connect the water outlet channel 26 with the main water inlet chamber 25, thereby realizing the switching of the water outlet liquid path.

[0092] 3) Switching status indication process

[0093] During operation of the drive motor 71, the switching state indicator mechanism 9 is used to indicate the switching state of the automatic liquid dosing switching device, ensuring that the first camshaft 14 and the second camshaft 15 automatically rotate into position, achieving smooth switching between the detergent inlet and outlet paths. The micro switch 92 is connected to the switching state signal circuit.

[0094] When the drive motor 71 drives the first camshaft 14 and the second camshaft 15 to rotate through the drive gear 72 and the transmission assembly 8, the switching wheel 91 rotates a certain angle along with the drive gear 72, the pole claw 93 abuts against the shift rod 94, and the shift rod 94 triggers the micro switch 92 to the on state; when the drive gear 72 rotates until the shift rod 94 falls into the gap between two adjacent pole claws 93, the micro switch 92 is disconnected.

[0095] According to the connection and disconnection of the micro switch 92, the switching state signal circuit connected to the micro switch 92 outputs a pulse signal representing the switching state. The control device of the intelligent washing machine determines the blockage status of each liquid inlet nozzle 21 and water outlet nozzle 32 based on the pulse signal, and controls the operation of components such as the liquid pump 6 and the solenoid valves on the inlet and outlet pipes to realize automatic washing of the washing machine.

[0096] Compared with the prior art, the automatic liquid dosing switching device for an intelligent washing machine provided by the present invention realizes the integration of the water inlet and detergent inlet channels by means of a liquid inlet switching chamber and a water inlet switching chamber provided in the base, a water inlet valve core for connecting the water inlet nozzle and the liquid inlet nozzle, and a detergent valve core for connecting the liquid inlet nozzle and the liquid inlet switching chamber. This greatly reduces the complexity of the passage of the liquid dosing device of the intelligent washing machine, reduces the volume occupied by the liquid dosing device of the washing machine, makes it adaptable to washing machines of different models, expands the scope of application of the automatic liquid dosing switching device of the washing machine, and reduces the production cost and maintenance difficulty of the automatic liquid dosing switching device of the washing machine.

[0097] In the present invention, the cover plate assembly includes a cover plate and a panel. A main water inlet chamber and a plurality of water outlet channels are provided in the cavity surrounded by the cover plate and the panel. The main water inlet chamber and the water outlet channels are connected through a water outlet valve provided with a first pressure relief nozzle and a second pressure relief nozzle. The first pressure relief nozzle and the second pressure relief nozzle on the water outlet valve are connected through the pressure relief chamber surrounded by the bottom surface of the valve body and the diaphragm. The water outlet switching liquid path of the washing machine is composed of the main water inlet chamber, the water outlet channel and the water outlet valve. The structure is simple and the water outlet switching is convenient, which greatly reduces the space occupied by the water outlet switching liquid path of the washing machine and the production cost of the water outlet switching device.

[0098] The valve core in the prior art is installed on the inlet or outlet valve seat by a spring, and acts when the valve core is affected by the camshaft to separate the blocking of the inlet and outlet. The sealing reliability of this blocking mode is poor, and when the water inlet pressure of the water inlet end of the switch is large, the valve core is easily impacted to cause the leakage of the water outlet. Moreover, as the use time is prolonged, the detergent will corrode the sealing surface of the valve core, which easily leads to the failure of the sealing surface, thereby affecting the service life of the internal electronic components of the washing machine.

[0099] Unlike the prior art, in the present application, the piston of the liquid outlet valve is provided with a sealing surface, and a sealing ring is arranged between the upper valve seat and the liquid inlet nozzle. The double sealing structure is formed by the sealing surface and the sealing ring to improve the sealing property of the liquid outlet valve. The piston of the liquid outlet valve does not directly contact the liquid inlet nozzle, but blocks the liquid inlet nozzle by blocking the liquid inlet hole on the upper valve seat of the liquid outlet valve, thereby avoiding the problem that the sealing surface of the piston is corroded by the detergent as the use time is prolonged when the piston directly blocks the liquid inlet nozzle, and affecting the sealing property of the piston.

[0100] In the present application, the water outlet valve completely isolates the water between the panel and the valve core support plate of the base by arranging the diaphragm. The plurality of diaphragms are connected into a whole through the side surface to avoid the problem that the water outlet valve is affected by the water inlet pressure and the blocking is loose, thereby greatly improving the sealing reliability of the water outlet valve.

[0101] The present application is not limited to the above-mentioned best embodiment, and any person should know that the structural changes made under the inspiration of the present application fall within the protection scope of the present application.

Claims

1. An automatic liquid feeding switching device for an intelligent washing machine, characterized in that: include: The base has a top surface provided with a liquid inlet switching chamber and a water inlet switching chamber separated by a partition, wherein a first camshaft and a second camshaft are respectively provided in the liquid inlet switching chamber and the water inlet switching chamber for rotation, and wherein the outer circumferences of the first camshaft and the second camshaft are provided with a plurality of grooves distributed along the length direction thereof, and the grooves are staggered on the camshafts; a cover plate assembly, disposed on the top surface of the base, the cover plate assembly being provided with a plurality of liquid inlet nozzles, a plurality of water outlet nozzles and a main water inlet nozzle; a liquid collecting channel, a main water inlet cavity and a plurality of water outlet channels being provided in the cover plate assembly; the liquid collecting channel being in communication with the liquid inlet nozzle and the liquid inlet switching cavity; the main water inlet cavity being in communication with the main water inlet nozzle; and the water outlet channel being used to connect the main water inlet cavity and the water outlet nozzle; the liquid collecting channel being in communication with at least one of the water outlet channels; a liquid outlet valve and a water outlet valve, respectively provided on the first camshaft and the second camshaft, and as the first camshaft and the second camshaft rotate, the liquid outlet valve and the water outlet valve respectively block or dredge the liquid inlet nozzle and the water outlet channel; a liquid pump, the outlet end and the inlet end of which are respectively connected to the liquid collecting channel and the water outlet channel; a driving assembly connected to the first camshaft and the second camshaft via a transmission assembly, and configured to drive the first camshaft and the second camshaft to rotate; The cover plate assembly comprises: A cover plate is provided with a liquid separation partition on its top surface, which is used to enclose the water outlet channel and the main water inlet chamber; a first pressure relief hole is provided in the main water inlet chamber, and a second pressure relief hole is provided in the water outlet channel, and the water outlet valve connects the main water inlet chamber and the water outlet channel through the first pressure relief hole and the second pressure relief hole; A panel is provided on the top surface of the cover plate; the water outlet and the main water inlet are provided on the panel; The driving assembly includes a driving motor and a driving gear sleeved on the motor shaft of the driving motor; the transmission assembly is a transmission gear or a transmission gear set.

2. The liquid dosing automatic switching device for an intelligent washing machine according to claim 1, characterized in that: The liquid outlet valve comprises: An upper valve seat is arranged in the liquid inlet nozzle, and its outer diameter is adapted to the inner diameter of the liquid inlet nozzle; the upper valve seat is cylindrical, and a liquid inlet hole is provided on its top surface, and an upper liquid leakage hole is provided on its side surface, and the liquid inlet hole and the upper liquid leakage hole are connected to the inner cavity of the upper valve seat; The lower valve seat is arranged at the lower end of the upper valve seat, and a lower leakage hole is provided at the center of the bottom surface thereof. A piston bracket is provided in the lower leakage hole, and a piston handle hole is provided at the center of the piston bracket; The piston includes a piston head and a piston handle arranged on the bottom surface of the piston head; the piston head is provided with a sealing surface adapted to the liquid inlet hole; the piston handle is arranged in the piston handle hole, and its lower end abuts against the first camshaft; the piston handle is provided with a first return spring.

3. The liquid dosing automatic switching device of the intelligent washing machine according to claim 2, characterized in that: An expanded diameter portion is provided at the lower end of the liquid inlet nozzle, the upper valve seat is arranged in the expanded diameter portion, a sealing ring is provided on the outer surface of the upper valve seat, and the upper valve seat is arranged in sealing contact with the expanded diameter portion through the sealing ring.

4. The liquid dosing automatic switching device for an intelligent washing machine according to claim 1, characterized in that: The water outlet valve comprises: A diaphragm, a valve core support plate is provided in the water inlet switching chamber, and the diaphragm is arranged on the top surface of the valve core support plate; a valve core groove is provided on the top surface of the diaphragm, a sealing convex shaft is provided in the valve core groove, and the sealing convex shaft and the side wall of the valve core groove form a pressure relief channel; the side surfaces of two adjacent diaphragms are integrally connected; a valve core disposed on the top surface of the partition plate, the valve core being provided with a first pressure relief nozzle and a second pressure relief nozzle, the upper ends of the first pressure relief nozzle and the second pressure relief nozzle being respectively disposed in the first pressure relief hole and the second pressure relief hole, and the lower ends thereof being respectively disposed above the pressure relief channel and the sealing convex shaft; a pressure relief cavity being provided on the bottom surface of the valve core, the first pressure relief nozzle and the second pressure relief nozzle being disposed in the pressure relief cavity; The bracket includes a support frame and a lifting shaft arranged at the center of the top surface of the support frame, the support frame is sleeved on the second camshaft, and a limit pin is provided on the upper inner part of the support frame, and the limit pin abuts against the second camshaft; the lifting shaft is connected to the sealing cam shaft, and as the second camshaft rotates, the sealing cam shaft is pushed to seal or clear the second pressure relief nozzle; a second return spring is sleeved on the lifting shaft.

5. The liquid dosing automatic switching device for an intelligent washing machine according to claim 4, characterized in that: A sealing gasket is provided between the valve core and the cover plate, and the sealing gasket comprises: a gasket body, arranged on the top surface of the valve core, and provided with a limiting through hole adapted to the first pressure relief nozzle and the second pressure relief nozzle; The support ring is arranged on the outer circumferential surface of the gasket body. The support ring and the gasket body are connected by a connecting ring. The cross section of the connecting ring is U-shaped.

6. The liquid dosing automatic switching device for an intelligent washing machine according to claim 4, characterized in that: A connecting convex ring is provided in the valve core groove, and the inner and outer sides of the connecting convex ring are respectively connected to the side surfaces of the sealing convex shaft and the pressure relief channel.

7. The liquid dosing automatic switching device for an intelligent washing machine according to claim 4, characterized in that: A guide groove is provided on the outer side surface of the support frame, and a guide protrusion adapted to the guide groove is provided in the water inlet switching cavity.

8. The liquid dosing automatic switching device for an intelligent washing machine according to claim 1, characterized in that: Also included is a switching state indication mechanism, including: A switching wheel is provided on the driving gear and is coaxial with the driving gear; a plurality of pole claws are provided on the outer circumference of the switching wheel, wherein the pole claws include an initial pole claw, and the width of the initial pole claw is greater than that of the other pole claws; A micro switch is arranged on one side of the switching wheel. A rotatable shifting rod is provided on the micro switch, and the shifting rod abuts against the pole claw.

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