Multi-path piston pump automatic putting system

Abstract

The utility model discloses a multi-path piston pump automatic putting system which comprises a main valve body, a pump cover assembly is arranged on the main valve body, and a plurality of flow channels are arranged on the pump cover assembly. A piston driving assembly is arranged in the main valve body, an electromagnet control assembly and a bidirectional motor assembly are further arranged in the main valve body, and the electromagnet control assembly comprises a double-row switching gear set body; the piston driving assembly comprises a double-layer middle partition plate, and transmission gear assemblies are arranged on the two sides of the double-layer middle partition plate. Each transmission gear assembly comprises a driving gear, first vertical racks arranged in pairs are arranged on the double-row switching gear set body, and second vertical racks are arranged on the driving gears; the bidirectional motor assembly drives the double-row switching gear set body to rotate when working, and the electromagnet control assembly controls the double-row switching gear set body to move when working. According to the utility model, the piston driving assembly can be driven to work through a single motor, so that a function of putting multiple paths of wash supplies is realized; and the main valve body has a flushing function, so that each chamber is convenient to clean.

Description

Technical Field

[0001] This utility model belongs to the technical field of washing machine accessories, specifically relating to a multi-channel piston pump automatic dispensing system. Background Technology

[0002] Currently, most automatic dispensing systems in commercially available washing machines use piston pumps, peristaltic pumps, and other electrical components as the power source for dispensing. Piston pumps, driven by a motor, create a volume difference within the internal cavity using an internal piston rod with a sealing ring, and, in conjunction with a one-way mechanism, dispensing the liquid. Single-channel and dual-channel piston pumps are common in the market. However, with the continuous improvement of people's living standards, users have placed higher demands on the diversity of dispensing functions in washing machines, prompting continuous technological advancements in fully automatic washing machines. They are no longer satisfied with just automatic dual dispensing; for example, washing machines now include a small drum module for washing and caring for baby clothes, or require the addition of disinfectant dispensing to the detergent and fabric softener dispensing functions. Existing patent CN218711597U discloses a water-controlled reversing valve, a detergent dispensing device, and a washing machine. The detergent extraction in this existing patent uses the Venturi principle to create negative pressure for extraction, resulting in low dispensing accuracy. Furthermore, the outlet orientation of the existing valve body switching water channels is different, making it difficult to install on the washing machine module.

[0003] A dual-path plunger pump is disclosed in the existing patent document with publication number CN207813839U. This dual-path plunger pump includes a pump body with a cavity inside. The pump body also has a left pump chamber and a right pump chamber. A left driven gear is provided on the left side of the cavity, and the left driven gear is connected to a left piston rod. The left piston rod cooperates with the left pump chamber and can move in the left pump chamber. A right driven gear is provided on the right side of the cavity, and the right driven gear is connected to a right piston rod. The right piston rod cooperates with the right pump chamber and can move in the right pump chamber. A driving gear is provided in the middle of the cavity, and a transmission gear is provided in the cavity. When the driving gear rotates forward, the transmission gear is located on the left side and meshes with the left driven gear. When the driving gear rotates in reverse, the transmission gear is located on the right side and meshes with the right driven gear. A motor for driving the driving gear is provided on the outside of the housing. Therefore, existing plunger pumps can only achieve dual-channel detergent dispensing, have limited flow channels, and poor versatility. Furthermore, plunger pumps lack a flushing function, making them prone to crystallization and scaling inside. Therefore, a multi-channel piston pump automatic dispensing system is needed to overcome these difficulties. Summary of the Invention

[0004] This invention addresses the problems existing in the prior art by designing a multi-channel piston pump automatic dispensing system. This system uses a single motor to drive the piston drive assembly, thereby enabling the dispensing of multiple toiletries. Simultaneously, the main valve body has a rinsing function for easy cleaning of its various chambers.

[0005] The objective of this invention is achieved through the following technical solution: a multi-channel piston pump automatic dispensing system, comprising a main valve body, a pump cover assembly installed at the open end of the main valve body, the pump cover assembly having multiple flow channels connected to the main valve body; a piston drive assembly for controlling the opening or closing of the flow channels is provided inside the main valve body; an electromagnet control assembly and a bidirectional motor assembly are also provided inside the main valve body, the electromagnet control assembly including a double-row switching gear set body; the piston drive assembly including a double-layer intermediate partition, with paired transmission gear assemblies on both sides of the double-layer intermediate partition; each transmission gear assembly including a driving gear, a movable gear, and a paired cam gear; a paired first vertical rack is provided on the double-row switching gear set body, and a second vertical rack is provided on each driving gear; when the bidirectional motor assembly is working, it drives the double-row switching gear set body to rotate, and when the electromagnet control assembly is working, it controls the double-row switching gear set body to move relative to the driving gear.

[0006] Preferably, the upper and lower layers of the double-layer intermediate partition are respectively provided with transmission gear assemblies; the pump cover assembly is connected to the main valve body, and the pump cover assembly includes an upper pump cover and a lower pump cover, which are fixedly connected, and the lower pump cover is connected to the main valve body; the upper end face of the upper pump cover is provided with a flushing inlet, and the side of the upper pump cover is respectively provided with a third liquid inlet and a fourth liquid inlet arranged side by side; the side of the lower pump cover is provided with a first liquid inlet, a second liquid inlet, a first liquid outlet, and a second liquid outlet, and the first liquid inlet and the first liquid outlet are arranged adjacent to each other. The second liquid inlet and the second liquid outlet are arranged adjacent to each other; the third liquid inlet and the second liquid outlet are arranged adjacent to each other, and the fourth liquid inlet and the first liquid outlet are arranged adjacent to each other; the transmission gear assembly arranged on the upper layer is used to control the flow channel opening and closing corresponding to the third liquid inlet and the flow channel opening and closing corresponding to the fourth liquid inlet, and the transmission gear assembly arranged on the lower layer is used to control the flow channel opening and closing corresponding to the first liquid inlet and the flow channel opening and closing corresponding to the second liquid inlet; when the electromagnet control assembly is working, it controls the double row switching gear set body to mesh with the transmission gear assembly of one of the layers.

[0007] Preferably, the transmission gear assembly includes a drive gear, and the second vertical rack on the drive gear meshes with the first vertical rack on the double-row switching gear set body; the electromagnet control assembly also includes a rear cover body, a return spring, an iron core, and a coil assembly; the rear cover body is connected to the main valve body, the iron core is slidably installed in the main valve body, and the iron core is inserted into the double-layer intermediate partition; a return spring is provided between the iron core and the rear cover body, and a coil assembly is installed in the rear cover body; the double-row switching gear set body is fixedly installed on the iron core, and when the coil assembly is energized, the iron core drives the double-row switching gear set body to move closer to the transmission gear assembly set on the upper layer.

[0008] Preferably, the iron core has a motor socket at its end, the outline of which is adapted to the outline of the motor shaft of the bidirectional motor assembly; the iron core can slide relative to the motor shaft of the bidirectional motor assembly, and the bidirectional motor assembly drives the iron core to rotate when it is working; the outer layer of the bidirectional motor assembly is provided with a motor cover.

[0009] Preferably, each of the transmission gear assemblies further includes a pair of piston rods, each piston rod having a piston body at its end. A piston rod is located within the flow channels corresponding to the first and second liquid inlets, and also within the flow channels corresponding to the third and fourth liquid inlets. The transmission gear assembly includes a drive gear, a movable gear, and a pair of cam gears. Both the drive gear and the cam gear are rotatably connected to the double-layer intermediate partition. The movable gear is slidably connected to the double-layer intermediate partition, simultaneously meshing with the drive gear and any one of the cam gears. The cam gear is connected to the piston rod, and the piston rod is slidably connected to the flow channel within the main valve body.

[0010] Preferably, the cam gear has a first protrusion, and the piston rod has a first oblong hole; the first protrusion is slidably installed in the first oblong hole, and the outer contour of the first protrusion matches the outer contour of the first oblong hole; when the cam gear rotates, the piston rod moves up and down along the flow channel in the main valve body; the drive gear has a second vertical rack, which is annular, and the second vertical rack meshes with the first vertical rack; when the drive gear rotates forward, the movable gear meshes with one of the cam gears, and when the drive gear rotates in reverse, the movable gear deflects and meshes with the other cam gear.

[0011] Preferably, a limiting member is provided in the flow channel of the main valve body, and a second oblong hole for inserting the limiting member is provided on the piston rod; the outer contour of the second oblong hole is adapted to the outer contour of the limiting member.

[0012] Preferably, a first one-way valve assembly is provided in the flow channel corresponding to the first liquid inlet and the second liquid inlet, and a first one-way valve assembly is also provided in the flow channel corresponding to the third liquid inlet and the fourth liquid inlet.

[0013] Preferably, the flushing inlet is provided with a second one-way valve assembly at its open end, the flushing inlet is connected to the chamber where the third liquid inlet is located, and the flushing inlet is connected to the chamber where the fourth liquid inlet is located.

[0014] Compared with the prior art, the present invention has the following advantages: 1. The main valve body of the present invention is provided with a pair of transmission gear assemblies, each of which can control the opening and closing of two flow channels respectively, thus enabling the individual dispensing of four types of detergent products, and improving versatility; 2. A single bidirectional motor assembly can drive the double-row switching gear set body to rotate, and an electromagnet control assembly controls the movement of the double-row switching gear set body relative to the transmission gear assembly; thus, the double-row switching gear set body can drive each of the transmission gear assemblies to rotate, so a single bidirectional motor assembly can control the opening and closing of each flow channel, resulting in lower manufacturing costs; 3. A rinsing inlet is provided in the pump cover assembly, which can clean the chamber inside the pump cover assembly, thereby preventing detergent residue crystals from remaining in the flow channels. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present utility model;

[0016] Figure 2 This is the front view of the present invention;

[0017] Figure 3 This is an exploded view of the present invention;

[0018] Figure 4 This is a schematic diagram of the internal structure of the electromagnet control assembly.

[0019] Figure 5 This is a schematic diagram showing the meshing state between the body of the double-row switching gear set and the upper-level transmission gear assembly.

[0020] Figure 6 This is a schematic diagram showing the meshing state of the double-row switching gear set body and the lower transmission gear assembly.

[0021] Figure 7 This is a schematic diagram of the assembly of the double-row switching gear set body and the iron core.

[0022] Figure 8 This is a 3D view of the driving gear;

[0023] Figure 9 This is a schematic diagram of the internal structure of the piston drive assembly;

[0024] Markings in the diagram: 1. Main valve body; 2. Pump cover assembly; 21. Upper pump cover; 22. Lower pump cover; 3. Piston drive assembly; 31. Double-layer intermediate partition plate; 32. Transmission gear assembly; 321. Drive gear; 322. Movable gear; 323. Cam gear; 324. Second vertical rack; 325. Piston rod; 326. Piston body; 327. First protrusion; 328. First oblong hole; 329. Second oblong hole; 4. Electromagnetic control assembly; 41. Double-row switching gear. 42. Main body; 43. First vertical rack; 44. Rear cover body; 45. Return spring; 46. Iron core; 47. Coil assembly; 48. Motor socket; 59. Bidirectional motor assembly; 50. Motor cover; 60. Flushing inlet; 71. Third liquid inlet; 82. Fourth liquid inlet; 93. First liquid inlet; 10. Second liquid inlet; 11. First liquid outlet; 12. Second liquid outlet; 13. Limiting element; 14. First one-way valve assembly; 15. Second one-way valve assembly; 16. Third oblong hole. Detailed Implementation

[0025] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0026] like Figures 1 to 9 As shown, this embodiment discloses a multi-channel piston pump automatic dispensing system, including a main valve body 1. A pump cover assembly 2 is installed at the open end of the main valve body 1. The pump cover assembly 2 has multiple flow channels connected to the main valve body 1. The main valve body 1 is provided with a piston drive assembly 3 for controlling the opening or closing of the flow channels. The main valve body 1 is also provided with an electromagnet control assembly 4 and a bidirectional motor assembly 5. The electromagnet control assembly 4 includes a double-row switching gear body 41. The piston drive assembly 3 includes a double-layer intermediate partition 31. The plate 31 has a pair of transmission gear assemblies 32 on both sides; each transmission gear assembly 32 includes a drive gear 321, a movable gear 322 and a pair of cam gears 323; the double row switching gear body 41 has a pair of first vertical racks 42 and a second vertical rack 324 on each drive gear 321; when the bidirectional motor assembly 5 is working, it drives the double row switching gear body 41 to rotate, and when the electromagnet control assembly 4 is working, it controls the double row switching gear body 41 to move relative to the drive gear 321.

[0027] The upper and lower layers of the double-layer intermediate partition 31 are respectively provided with transmission gear assemblies 32; the pump cover assembly 2 is connected to the main valve body 1, and the pump cover assembly 2 includes an upper pump cover 21 and a lower pump cover 22, which are fixedly connected, and the lower pump cover 22 is connected to the main valve body 1; the upper end face of the upper pump cover 21 is provided with a flushing inlet 6, and the side of the upper pump cover 21 is provided with a third liquid inlet 7 and a fourth liquid inlet 8 arranged side by side; the side of the lower pump cover 22 is provided with a first liquid inlet 9, a second liquid inlet 10, a first liquid outlet 11 and a second liquid outlet 12, and the first liquid inlet 9 and the first liquid outlet 11 are provided with a first liquid inlet 9 and a second liquid outlet 10. The second liquid inlet 10 and the second liquid outlet 12 are arranged adjacent to each other; the third liquid inlet 7 and the second liquid outlet 12 are arranged adjacent to each other, and the fourth liquid inlet 8 and the first liquid outlet 11 are arranged adjacent to each other; the upper layer transmission gear assembly 32 is used to control the flow channel opening and closing corresponding to the third liquid inlet 7 and the flow channel opening and closing corresponding to the fourth liquid inlet 8, and the lower layer transmission gear assembly 32 is used to control the flow channel opening and closing corresponding to the first liquid inlet 9 and the flow channel opening and closing corresponding to the second liquid inlet 10; when the electromagnet control assembly 4 is working, it controls the double row switching gear set body 41 to mesh with the transmission gear assembly 32 of one layer. The transmission gear assembly 32 includes a drive gear 321, and the second vertical rack 324 on the drive gear 321 meshes with the first vertical rack 42 on the double-row switching gear body 41. The electromagnet control assembly 4 also includes a rear cover body 43, a return spring 44, an iron core 45, and a coil assembly 46. The rear cover body 43 is connected to the main valve body 1, and the iron core 45 is slidably installed in the main valve body 1 and is inserted into the double-layer intermediate partition 31. A return spring 44 is provided between the iron core 45 and the rear cover body 43, and the coil assembly 46 is installed in the rear cover body 43. The double-row switching gear body 41 is fixedly installed on the iron core 45. When the coil assembly 46 is energized, the iron core 45 drives the double-row switching gear body 41 to move closer to the transmission gear assembly 32 set on the upper layer. The end of the iron core 45 is provided with a motor socket 47, the outer contour of the motor socket 47 is adapted to the outer contour of the motor shaft of the bidirectional motor assembly 5; the iron core 45 can slide relative to the motor shaft of the bidirectional motor assembly 5, and the bidirectional motor assembly 5 drives the iron core 45 to rotate when it is working; the outer layer of the bidirectional motor assembly 5 is provided with a motor cover 51.

[0028] Each of the transmission gear assemblies 32 further includes a pair of piston rods 325, each piston rod having a piston body 326 at its end. Piston rods 325 are located within the flow channels corresponding to the first liquid inlet 9 and the second liquid inlet 10, and piston rods 325 are also located within the flow channels corresponding to the third liquid inlet 7 and the fourth liquid inlet 8. Each transmission gear assembly 32 includes a drive gear 321, a movable gear 322, and a pair of cam gears 323. Both the drive gear 321 and the cam gears 323 are rotatably connected to the double-layer intermediate partition 31. The movable gear 322 is slidably connected to the double-layer intermediate partition 31, and simultaneously meshes with the drive gear 321 and any one of the cam gears 323. A third oblong hole 16 is provided on the double-layer intermediate partition 31, and the movable gear 322 is slidably installed within the third oblong hole 16. The cam gear 323 connects to the piston rods 325, and the piston rods 325 are slidably connected to the flow channels within the main valve body 1. The cam gear 323 is provided with a first protrusion 327, and the piston rod 325 is provided with a first waist-shaped hole 328; the first protrusion 327 is slidably installed in the first waist-shaped hole 328, and the outer contour of the first protrusion 327 is adapted to the outer contour of the first waist-shaped hole 328; when the cam gear 323 rotates, the piston rod 325 moves up and down along the flow channel in the main valve body 1; the drive gear 321 is provided with a second vertical rack 324, the second vertical rack 324 is annular, and the second vertical rack 324 meshes with the first vertical rack 42; when the drive gear 321 rotates forward, the movable gear 322 meshes with one of the cam gears 323, and when the drive gear 321 rotates in reverse, the movable gear 322 deflects and meshes with the other cam gear 323. The main valve body 1 has a limiting member 13 in its flow channel, and the piston rod 325 has a second oblong hole 329 that passes through the limiting member 13; the outer contour of the second oblong hole 329 is adapted to the outer contour of the limiting member 13. A first one-way valve assembly 14 is provided in the flow channels corresponding to the first liquid inlet 9 and the second liquid inlet 10, and a first one-way valve assembly 14 is also provided in the flow channels corresponding to the third liquid inlet 7 and the fourth liquid inlet 8. A second one-way valve assembly 15 is provided at the opening end of the flushing inlet 6. The flushing inlet 6 communicates with the chamber where the third liquid inlet 7 is located, and the flushing inlet 6 communicates with the chamber where the fourth liquid inlet 8 is located.

[0029] The specific operation process of this embodiment is as follows: the first liquid inlet 9, the second liquid inlet 10, the third liquid inlet 7, and the fourth liquid inlet 8 are respectively connected to the ink cartridge containing detergent, and each liquid inlet corresponds to a flow channel; a piston rod 325 is installed in each flow channel, and a piston body 326 is installed at the end of the piston rod 325. The cam gear 323 is connected to the piston rod 325 through the first protrusion 327, which is eccentrically set relative to the cam gear 323; when the bidirectional motor assembly 5 drives the cam gear 323 to rotate, the piston rod 325 can reciprocate; then there will be a volume difference in each flow channel, and a first one-way valve assembly 14 is also provided in the flow channel, thereby realizing the liquid dispensing function.

[0030] By default, the coil assembly 46 within the electromagnet control component 4 is not energized, causing the iron core 45 to be positioned close to the lower transmission gear assembly 32. The spring force of the reset spring 44 is pre-set at the factory, ensuring that the double-row switching gear body 41 on the iron core 45 can mesh with the lower transmission gear assembly 32 when the coil assembly 46 is not energized. When the coil assembly 46 is energized, the iron core 45 moves closer to the position of the rear cover body 43, allowing the double-row switching gear body 41 to mesh with the upper transmission gear assembly 32. When the double-row switching gear body 41 meshes with the lower transmission gear assembly 32, the lower transmission gear assembly 32 is close to the first liquid inlet 9 and the second liquid inlet 10, allowing the two flow channels corresponding to the first liquid inlet 9 and the second liquid inlet 10 to draw and dispense detergent. When the double-row switching gear set body 41 meshes with the upper transmission gear assembly 32, the upper transmission gear assembly 32 is close to the third liquid inlet 7 and the fourth liquid inlet 8, so the two flow channels corresponding to the third liquid inlet 7 and the fourth liquid inlet 8 can draw and dispense detergent.

[0031] The drive gear 321 of the transmission gear assembly 32 is provided with a second vertical rack 324, and the double-row switching gear body 41 is provided with a first vertical rack 42. In this way, the position of the double-row switching gear body 41 is switched by the iron core 45, so that the double-row switching gear body 41 can drive the drive gears 321 on both sides of the double-layer middle partition 31 to rotate respectively. When the electromagnet control component 4 is not energized, detergent can be drawn through the first liquid inlet 9 and the second liquid inlet 10. The drive gear 321 is connected to the bidirectional motor component 5. When the bidirectional motor component 5 rotates forward, it causes the movable gear 322 to rotate near the cam gear 323 near the first liquid inlet 9. This causes the cam gear 323 near the first liquid inlet 9 to drive the piston rod 325 connected to it to extend and retract, and the detergent is discharged from the first liquid outlet 11. When the bidirectional motor component 5 rotates in reverse, it causes the movable gear 322 to rotate near the cam gear 323 near the second liquid inlet 10. This causes the cam gear 323 near the second liquid inlet 10 to drive the piston rod 325 connected to it to extend and retract, and the detergent is discharged from the second liquid outlet 12.

[0032] When the electromagnet control component 4 is energized, detergent can be drawn through the third liquid inlet 7 and the fourth liquid inlet 8. When the bidirectional motor component 5 rotates forward, the movable gear 322 rotates near the cam gear 323 near the third liquid inlet 7, which in turn drives the piston rod 325 connected to it to extend and retract. The third liquid inlet 7 is adjacent to the second liquid outlet 12, and the detergent is discharged from the second liquid outlet 12. When the bidirectional motor component 5 rotates in reverse, the movable gear 322 rotates near the cam gear 323 near the fourth liquid inlet 8, which in turn drives the piston rod 325 connected to it to extend and retract. The fourth liquid inlet 8 is adjacent to the first liquid outlet 11, and the detergent is discharged from the first liquid outlet 11.

[0033] When it is necessary to flush the chambers in the flow channel, water enters through the flushing inlet 6, thereby flushing the four chambers in the pump cover assembly 2. After cleaning, the piston rod 325 is extended and retracted through the upper and lower transmission gear assemblies 32, thereby opening the first outlet 11 and the second outlet 12; then the wastewater after cleaning is discharged from the first outlet 11 and the second outlet 12, and the cleaning process is completed.

[0034] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A multi-channel piston pump automatic dispensing system, comprising a main valve body (1), characterized in that, A pump cover assembly (2) is installed at the open end of the main valve body (1). The pump cover assembly (2) is provided with multiple flow channels connected to the main valve body (1). The main valve body (1) is provided with a piston drive assembly (3) for controlling the opening or closing of the flow channels. The main valve body (1) is also provided with an electromagnet control assembly (4) and a bidirectional motor assembly (5). The electromagnet control assembly (4) includes a double-row switching gear body (41). The piston drive assembly (3) includes a double-layer intermediate partition (31). The double-layer intermediate partition (31) has paired transmissions on both sides. Gear assembly (32); each of the transmission gear assemblies (32) includes a drive gear (321), a movable gear (322) and a pair of cam gears (323); the double row switching gear body (41) is provided with a pair of first vertical racks (42), and each of the drive gears (321) has a second vertical rack (324); when the bidirectional motor assembly (5) is working, it drives the double row switching gear body (41) to rotate, and when the electromagnet control assembly (4) is working, it controls the double row switching gear body (41) to move relative to the drive gear (321).

2. The multi-channel piston pump automatic dispensing system according to claim 1, characterized in that, The upper and lower layers of the double-layer intermediate partition (31) are respectively provided with transmission gear assemblies (32); the pump cover assembly (2) is connected to the main valve body (1), the pump cover assembly (2) includes an upper pump cover (21) and a lower pump cover (22), the upper pump cover (21) and the lower pump cover (22) are fixedly connected, and the lower pump cover (22) is connected to the main valve body (1); the upper end face of the upper pump cover (21) is provided with a flushing inlet (6), and the side of the upper pump cover (21) is respectively provided with a third liquid inlet (7) and a fourth liquid inlet (8) arranged side by side; the side of the lower pump cover (22) is provided with a first liquid inlet (9), a second liquid inlet (10), a first liquid outlet (11) and a second liquid outlet (12), the first liquid inlet (9) and the second liquid outlet (12) are respectively provided with a first liquid inlet (9) and a second liquid inlet (10), a first liquid outlet (11) and a second liquid outlet (12), the first liquid inlet (9) and the second liquid outlet (12) are respectively provided with a first liquid inlet (9) and a second liquid outlet (10) and a third liquid outlet (12) arranged side by side. One liquid outlet (11) is arranged adjacent to the other, and the second liquid inlet (10) and the second liquid outlet (12) are arranged adjacent to each other; the third liquid inlet (7) and the second liquid outlet (12) are arranged adjacent to each other, and the fourth liquid inlet (8) and the first liquid outlet (11) are arranged adjacent to each other; the transmission gear assembly (32) arranged on the upper layer is used to control the flow channel opening and closing corresponding to the third liquid inlet (7) and the flow channel opening and closing corresponding to the fourth liquid inlet (8); the transmission gear assembly (32) arranged on the lower layer is used to control the flow channel opening and closing corresponding to the first liquid inlet (9) and the flow channel opening and closing corresponding to the second liquid inlet (10); when the electromagnet control assembly (4) is working, it controls the double row switching gear body (41) to mesh with the transmission gear assembly (32) of one of the layers.

3. The multi-channel piston pump automatic dispensing system according to claim 2, characterized in that, The transmission gear assembly (32) includes a drive gear (321), and the second vertical rack (324) on the drive gear (321) meshes with the first vertical rack (42) on the double-row switching gear body (41); the electromagnet control assembly (4) also includes a rear cover body (43), a return spring (44), an iron core (45), and a coil assembly (46); the rear cover body (43) is connected to the main valve body (1), and the iron core (45) is slidably mounted on the main valve body (1). 1) Inside, the iron core (45) is inserted into the double-layer middle partition plate (31); a reset spring (44) is provided between the iron core (45) and the rear cover body (43), and a coil assembly (46) is installed inside the rear cover body (43); a double row switching gear group body (41) is fixedly installed on the iron core (45), and when the coil assembly (46) is energized, the iron core (45) drives the double row switching gear group body (41) to move closer to the transmission gear assembly (32) set on the upper layer.

4. The multi-channel piston pump automatic dispensing system according to claim 3, characterized in that, The end of the iron core (45) is provided with a motor socket (47), the outer contour of the motor socket (47) is adapted to the outer contour of the motor shaft of the bidirectional motor assembly (5); the iron core (45) can slide relative to the motor shaft of the bidirectional motor assembly (5), and the bidirectional motor assembly (5) drives the iron core (45) to rotate when it is working; the outer layer of the bidirectional motor assembly (5) is provided with a motor cover (51).

5. The multi-channel piston pump automatic dispensing system according to claim 2, characterized in that, Each of the transmission gear assemblies (32) further includes a pair of piston rods (325), and each piston rod has a piston body (326) at its end. The piston rods (325) are provided in the flow channels corresponding to the first liquid inlet (9) and the second liquid inlet (10), and the piston rods (325) are also provided in the flow channels corresponding to the third liquid inlet (7) and the fourth liquid inlet (8). The transmission gear assembly (32) includes a drive gear (321), a movable gear (322), and a pair of cam gears (323). The drive gear (321) and the cam gears (323) are rotatably connected to the double-layer intermediate partition plate (31). The movable gear (322) is slidably connected to the double-layer intermediate partition plate (31), and the movable gear (322) simultaneously meshes with the drive gear (321) and any one of the cam gears (323). The cam gears (323) are connected to the piston rods (325), and the piston rods (325) are slidably connected to the flow channels in the main valve body (1).

6. The multi-channel piston pump automatic dispensing system according to claim 5, characterized in that, The cam gear (323) is provided with a first protrusion (327), and the piston rod (325) is provided with a first waist-shaped hole (328); the first protrusion (327) is slidably installed in the first waist-shaped hole (328), and the outer contour of the first protrusion (327) is adapted to the outer contour of the first waist-shaped hole (328); when the cam gear (323) rotates, the piston rod (325) moves up and down along the flow channel in the main valve body (1); the drive gear (321) is provided with a second vertical rack (324), the second vertical rack (324) is in the shape of a ring, and the second vertical rack (324) meshes with the first vertical rack (42); when the drive gear (321) rotates forward, the movable gear (322) meshes with one of the cam gears (323), and when the drive gear (321) rotates in reverse, the movable gear (322) deflects and meshes with the other cam gear (323).

7. The multi-channel piston pump automatic dispensing system according to claim 5, characterized in that, The main valve body (1) has a limiting member (13) in its flow channel, and the piston rod (325) has a second waist-shaped hole (329) through which the limiting member (13) passes; the outer contour of the second waist-shaped hole (329) is adapted to the outer contour of the limiting member (13).

8. The multi-channel piston pump automatic dispensing system according to claim 5, characterized in that, The first liquid inlet (9) and the second liquid inlet (10) are provided with a first one-way valve assembly (14) in the flow channel corresponding to the third liquid inlet (7) and the fourth liquid inlet (8). The first one-way valve assembly (14) is also provided in the flow channel corresponding to the third liquid inlet (7) and the fourth liquid inlet (8).

9. The multi-channel piston pump automatic dispensing system according to claim 2, characterized in that, The flushing inlet (6) is provided with a second one-way valve assembly (15) at its open end. The flushing inlet (6) is connected to the chamber where the third liquid inlet (7) is located, and the flushing inlet (6) is connected to the chamber where the fourth liquid inlet (8) is located.

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