A switch and a delivery device

Abstract

The present application provides a kind of switcher, it includes: shell, hollowly constituted chamber in shell, be equipped with multiple openings with chamber being communicated on shell, rotatable shaft is installed in chamber, is equipped with multiple cam parts with different openings being oppositely opened on rotatable shaft, each cam part respectively drives one-to-one corresponding piston relative opening telescopic movement, for controlling the sealing structure on different piston is closed or opened corresponding opening.The present application controls the rotation angle of cam shaft structure arranged in the chamber of switcher, utilizes the cam on cam shaft to drive piston and generates relative displacement, to realize the controllable opening and closing operation of different openings on switcher, the combination switching effect of the communication form of each opening of switcher, to further reach the significant technical progress of improving the diversification of switcher working mode.The present application also provides a kind of installation above-mentioned switcher's delivery device, for controlling different additives to be selectively or combined to different waterways.

Description

Technical Field

[0001] This invention belongs to the technical field of clothing processing equipment, specifically relating to an additive dispensing device for a washing machine, and more particularly to a switcher applied to a washing machine and the dispensing device. Background Technology

[0002] As consumers increasingly prioritize quality of life, washing machines have become indispensable in people's daily lives. During washing machine use, depending on the program being executed, appropriate additives need to be selected and added to the machine via different water channels and dispensing devices. Therefore, the washing machine's additive dispensing device needs to have multiple switchable water channel combinations.

[0003] However, in traditional automatic dispensing devices, one pump is usually needed to dispense one type of additive, and the more types of detergents dispensed, the more pumps are needed. At the same time, in the dispensing devices of washing machines with transmission, one-to-one control valves are usually provided for different water supply lines to meet the needs of different washing functions.

[0004] In the above situation, in order to meet the full functional requirements of the washing machine's dispensing device, it is usually necessary to install multiple pumps and multiple inlet valves. Such a solution requires a large number of electrical components, is complex to control, is costly, and has a higher failure rate.

[0005] In view of this, this solution proposes a switcher that uses a motor to control the on / off state of each water path in the switcher, and randomly combines them to form different connection channels, thereby realizing the output of multiple water paths and greatly reducing the number of electrical components.

[0006] In view of this, the present invention is hereby proposed. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a switcher to achieve the purpose of diversified combination opening and closing control of different openings.

[0008] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0009] A switcher includes: a housing, the housing having a hollow interior forming a chamber, the housing having multiple openings communicating with the chamber, a rotating rod rotatable about an axis installed in the chamber, the rotating rod having multiple cam portions that are opposite to different openings, each cam portion driving a piston that is correspondingly positioned to extend and retract relative to the opening, for controlling the sealing structures on different pistons to close or open the corresponding openings.

[0010] Furthermore, the cam portions on the rotating rod are arranged in an alternating pattern along the axis of the rotating rod; preferably, the radial protrusion positions of different cam portions relative to the axis of the rotating rod are the same or different.

[0011] Furthermore, the housing has multiple openings on one side, which are spaced apart along a straight line. The axis of the rotating rod inside the cavity is parallel to the straight line. The rotating rod has cams that correspond one-to-one with some or all of the openings. The cams and the corresponding openings are in the same cross section.

[0012] Furthermore, pistons are provided at different openings, and each piston is provided with a sealing structure that seals the corresponding opening. Each piston is provided with a through hole, and a rotating rod passes through each through hole in sequence. The part of the rotating rod that passes through each through hole is provided with a cam part for driving the corresponding piston to move.

[0013] Furthermore, the piston has a protrusion on the inner wall of the through hole that protrudes toward the center of the through hole and abuts against the cam portion. The protrusion is located on the side of the inner wall of the through hole away from the opening. Preferably, a spring is provided between the piston and the inner wall of the housing. The spring applies a pushing force to the piston toward the opening to push the sealing ring on the piston to close the opening.

[0014] Furthermore, multiple openings are provided on different side walls of the shell, and each opening is located in a different cross section of the shell.

[0015] Furthermore, the cavity of the housing is provided with two or more rotating rods, and each rotating rod is provided with a cam part to control the relative extension and retraction movement of different or the same pistons.

[0016] Furthermore, the housing is provided with multiple chambers, each with a rotating rod and at least one opening. The rotating rods in the different chambers drive the corresponding pistons to extend and retract via the cam section, thereby controlling the opening and closing of the corresponding openings.

[0017] Furthermore, a drive motor is provided on the housing, and the output end of the drive motor is directly or via a transmission structure connected to the rotating rod to drive the rotating rod to rotate around the axis; preferably, the end of the rotating rod extends out of the housing, and the extending end is meshed with the output end of the drive motor via a reduction gear set.

[0018] Compared with the prior art, the present invention, by employing the above-described technical means, has the following significant technical advancements:

[0019] This invention controls the rotation angle of the camshaft structure in the switch chamber, and uses the cam on the camshaft to drive the piston to generate relative displacement, so as to realize the controllable opening and closing operation of different openings on the switch and the combination switching of the connection forms of the openings of the switch, thereby achieving a significant technological advancement in improving the diversity of the working modes of the switch.

[0020] The present invention also introduces a dispensing device, which is equipped with any of the switches described above. The different openings of the switch are respectively connected to different water channels of the dispensing device, for controlling the dispensing of different additives, one or in combination, into different water channels.

[0021] Meanwhile, the present invention has a simple structure and significant effects, and is intended for widespread use.

[0022] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0023] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0024] Figure 1 This is a schematic diagram of the switcher in an embodiment of the present invention;

[0025] Figure 2 This is a top view of the switcher in an embodiment of the present invention;

[0026] Figure 3 This is an embodiment of the present invention. Figure 2 A schematic diagram of the AA section;

[0027] Figure 4 This is an embodiment of the present invention. Figure 2 A schematic diagram of the BB section;

[0028] Figure 5 This is an embodiment of the present invention. Figure 3 A magnified structural diagram at point C;

[0029] Figures 6a to 6d This is an embodiment of the present invention. Figure 4 A magnified schematic diagram of the rotating rod at point D rotating to different orientations;

[0030] Figure 7 This is a schematic diagram of the switcher in the embodiment of the present invention with the cover plate removed.

[0031] Figure 8 This is a top view of the switcher in the embodiment of the present invention with the cover plate removed.

[0032] Figure 9 This is an embodiment of the present invention. Figure 8A schematic diagram of the EE section.

[0033] Description of main components in the diagram:

[0034] 100. Switcher; 101. Housing; 102. Opening; 103. Chamber; 104. Piston; 105. Elastic unit; 106. Sealing structure; 107. Guide part; 108. Rotating rod; 109. Cam part; 110. Motor; 111. High-pressure chamber; 112. Low-pressure chamber; 113. Inner sealing ring; 114. Outer sealing ring; 115. Pressure relief chamber; 116. Groove; 117. Pressure relief port; 118. Pressure relief channel; 119. Connecting port; 120. Mounting hole; 121. Reduction gear set; 122. Pressure relief valve; 123. Limiting post; 124. Mounting groove; 125. Sealing ring; 126. Piston head; 127. Protrusion.

[0035] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0037] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0038] In the description of this invention, it should be noted that, 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] This invention provides a switcher 100, which can be used to switch different flow channels, water paths, and air paths, thereby achieving the effect of changing and adjusting the flow direction of fluids. For example, the switcher 100 can be installed on the additive dispensing device of a washing machine to allow for the selective dispensing of different types of additives, either individually or in combination; and / or to dispense single or combined additives into the washing machine via different water paths and in different dispensing methods.

[0040] like Figures 1 to 9 As shown in the embodiment of the present invention, the switcher 100 has a housing 101, and the interior of the housing 101 is hollow to form a chamber 103. The housing 101 has a plurality of openings 102, each of which is connected to the chamber 103. A piston 104 is provided at each of some or all of the openings 102 to open and close the openings 102. Each piston 104 can be driven by a camshaft structure provided on the switcher 100 to generate relative displacement, thereby realizing the effect of controllable opening and closing of different openings 102 and combination switching of the connection forms of each opening 102 of the switcher 100.

[0041] In this embodiment of the invention, the camshaft structure is a rotating rod 108 that can rotate around an axis and is installed in the chamber 103 of the housing 101. The cam portion 109 provided on the rotating rod 108 drives the piston to move, thereby achieving the effect of opening and closing each opening.

[0042] In this invention, the opening and closing control of the opening 102 of the switch 100 is achieved by moving the piston 104. During the movement of the piston 104, the sealing structure 106 on the piston 104 (e.g., piston, sealing ring, etc.) will not come into contact with the inner wall of the housing 101 of the switch 100. This avoids the situation where the sealing structure 106, made of elastic materials such as rubber, is deformed and fails due to friction and compression with the inner wall of the housing 101 of the switch 100 during the opening and closing process.

[0043] Example 1

[0044] like Figures 1 to 5 , Figures 6a to 6d As shown in the figure, this embodiment introduces a control valve structure. The control valve structure can be a control device for controlling the opening and closing of any opening 102 on the switch 100; of course, it can also be used alone and applied to other devices.

[0045] In this embodiment, the control valve structure includes: a housing 101, a hollow chamber 103 formed inside the housing 101, an opening 102 communicating with the chamber 103 on the housing 101, and a piston 104 that can extend and retract relative to the opening installed in the chamber 103; a drive structure for driving the piston 104 to move is installed on the housing 101, which is used to control the sealing structure 106 on the piston 104 to close or open the opening 102 accordingly.

[0046] like Figures 1 to 5 , Figures 6a to 6d As shown, in this embodiment, the driving structure includes,

[0047] The rotating rod 108, driven by the power unit, is installed in the chamber 103 and can rotate around an axis;

[0048] The rotating rod 108 is provided with a radially protruding cam portion 109. The cam portion 109 and the piston 104 at least partially overlap in the axial direction of the rotating rod 108. The distance between the protruding end of the cam portion 109 and the axis of the rotating rod 108 is greater than half the distance between the piston 104 and the axis of the rotating rod 108, so that the piston 104 can be driven to extend and retract during the rotation of the rotating rod 108 by the cam portion 109.

[0049] like Figures 6a to 6d As shown, in this embodiment, the piston 104 is provided with a through hole for the rotating rod 108 to pass through, and the rotating rod 108 is provided with a radially protruding rib at the through hole. The rib forms a cam portion 109. The piston 104 and the rotating rod 108 together form a cam transmission structure. When the rotating rod 108 rotates to the point where the rib abuts against the inner wall of the through hole of the piston 104, it pushes the piston 104 to move and drives the sealing structure 106 to open the corresponding opening.

[0050] In this embodiment, the driving structure further includes an elastic unit 105, which is clamped between the piston 104 and the housing 101. This unit provides an elastic restoring force to the piston 104 to close the corresponding opening of the sealing structure 106. When the rotating rod 108 rotates until the rib separates from the inner wall of the through hole of the piston 104, the elastic unit 105 pushes the piston 104 to move, causing the sealing structure 106 to block the opening 102. In this embodiment, the elastic unit 105 can be a spring, a pneumatic cylinder, a hydraulic cylinder, etc., any existing device or combination that provides an elastic restoring force. Preferably, in this embodiment, the elastic unit 105 is a spring.

[0051] like Figures 1 to 5 , Figures 6a to 6dAs shown, in this embodiment, the piston 104 is a block structure extending axially along the opening 102. The piston 104 of the block structure has a through hole in the middle that passes through both sides. The axis of the rotating rod 108 is parallel to the axis of the through hole and passes through the through hole. The part of the rotating rod 108 that passes through the through hole has radially outward protruding ribs. The ribs constitute a cam part 109 that pushes the piston 104 to move telescopically.

[0052] In this embodiment, the axial direction of the through hole provided on the piston 104 is perpendicular to the axial direction of the opening 102, so that the driving force of the rotation direction of the rotating rod 108 is transmitted to the piston 104 through the cam structure, so that the piston 104 can generate a pushing displacement along the radial direction of the rotating rod 108, thereby realizing the effect of the piston 104 moving axially and extending along the opening 102, and using the sealing structure on the piston 104 to correspond to the opening and closing of the opening 102.

[0053] In this embodiment, the end of the piston 104 near the opening 102 is the sealing end, and the opposite end away from the opening 102 is the supporting end. The sealing end of the piston 104 is provided with a sealing structure 106. The sealing structure 106 is a sealing ring 125 made of elastic material such as rubber. The sealing ring 125 is coaxially arranged with the opening 102 and can make sealing contact with the inner wall of the chamber 103 on the outer periphery of the opening 102, thereby achieving the effect of sealing and closing the opening 102. In this embodiment, the sealing end of the piston 104 is provided with a columnar piston head protruding outward along the axis of the opening. The sealing ring 125 is sleeved on the outer periphery of the piston head 126 and is clamped and fixed on the piston head 126 by the action of a radially protruding ring of ribs on the piston head 126.

[0054] In this embodiment, the support end of the piston 104 is connected to a spring constituting the elastic unit 105. The spring extends along the axial direction of the opening 102, and the two ends of the spring are respectively connected to the support end of the piston 104 and the inner wall of the housing 101.

[0055] Preferably, in this embodiment, the sealing structure 106 and the elastic unit 105 are coaxially arranged with the piston 104 to ensure that the piston does not deviate during movement and to improve the sealing effect. More preferably, the sealing structure 106, the elastic unit 105, and the piston 104 are all coaxially arranged with the opening 102.

[0056] In this embodiment, the inner peripheral wall of the through hole in the middle of the piston 104 is provided with a protrusion 127 that protrudes radially toward the center of the through hole. The protrusion 127 is located on the side of the through hole near the support end. The protrusion 127 enables the cam portion 109 of the rotating rod 108 to effectively push the piston 104 to move and increase the extension and retraction distance of the piston 104, thereby effectively realizing the control of the sealing structure 106 on the piston 104 to effectively close and open the opening 102.

[0057] Preferred, such as Figures 6a to 6d As shown, in this embodiment, the protrusion 127 is a triangular protrusion that slopes from the left and right sides toward the center, so that the inclined surfaces on both sides can effectively guide the cam 109 and prevent imbalance during the piston 104's operation.

[0058] like Figures 6a to 6d As shown, in this embodiment, a limiting post 123 protruding axially along the opening 102 is provided on the side of the inner wall of the housing 101 facing the supporting end of the piston 104. One end of the spring clamped between the supporting end of the piston 104 and the inner wall of the housing 101 is connected to the limiting post 123. In this embodiment, the supporting end of the piston 104 is provided with a mounting groove 124 opening towards the limiting post 123. One end of the spring constituting the elastic unit 105 is inserted into the mounting groove 124, and the other end is fitted onto the outer peripheral wall of the limiting post 123.

[0059] like Figures 1 to 5 , Figures 6a to 6d As shown, in this embodiment, the chamber 103 is provided with a guide part 107 to guide the piston 104 to move telescopically along the axial direction of the opening 102, so as to ensure that the piston 104 will not tilt in other directions during the telescopic movement and can only move along the axial direction of the opening 102, thereby effectively avoiding the occurrence of piston 104 position deviation and inability to be driven and controlled by the rotating rod 108.

[0060] In this embodiment, the inner wall of the housing 101 is provided with a piston groove that extends along the axial direction of the opening 102 and forms a guide portion 107. The side wall of the piston 104 is inserted into the piston groove. The side wall of the piston 104 inserted into the piston groove is the other side of the non-piston sealing end and the support end. Preferably, the side wall of the piston 104 is the side that is parallel to the axial direction of the rotating rod 108.

[0061] In this embodiment, the left and right side walls of the piston 104 are respectively inserted into the piston grooves in the inner wall of the corresponding side housing 101. The piston grooves on both sides are arranged in parallel and extend in a direction parallel to the axis of the opening 102. Preferably, the piston grooves on both sides are in the same cross section as the axis of the opening 102, so as to ensure that the piston 104 is always in the axial cross section of the opening 102, thereby effectively avoiding the occurrence of piston 104 displacement.

[0062] Example 2

[0063] like Figures 1 to 9As shown, this embodiment introduces a switcher 100, which includes: a housing 101, the housing 101 being hollow to form a chamber 103, the housing 101 having multiple openings 102 communicating with the chamber 103, a rotating rod 108 rotatable about an axis installed in the chamber 103, the rotating rod 108 having multiple cam portions 109 opening opposite to different openings 102, each cam portion 109 driving a piston 104 corresponding to it to extend and retract relative to the opening 102, for controlling the sealing structure 106 on different pistons 104 to close or open the corresponding opening 102.

[0064] In this embodiment, the valve body structure provided at each opening 102 of the switch 100 to control the opening and closing of the opening 102 is the control valve structure described in the above embodiment, so as to achieve the effect of effectively controlling the opening and closing of multiple openings 102 by using a single rotating rod 108.

[0065] like Figures 1 to 3 As shown, in this embodiment, the cam portions 109 provided on the rotating rod 108 are arranged alternately along the axial direction of the rotating rod 108, and each cam portion 109 is located at the cross section of a different opening 102, so as to effectively control the opening and closing of the corresponding opening 102.

[0066] Preferably, in this embodiment, the radial protrusion positions of different cam portions 109 relative to the axis of the rotating rod 108 are the same or different, so that when the rotating rod 108 rotates around the axis to the corresponding position, the cam portions 109 drive the pistons 104 at different openings 102 to open and move separately or simultaneously.

[0067] In this embodiment, the housing 101 of the switcher 100 is provided with a plurality of openings 102 on one side, and each opening 102 is arranged at intervals along a straight line. The axis of the rotating rod 108 provided in the chamber 103 is parallel to the aforementioned straight line. The rotating rod 108 is provided with a cam portion 109 that corresponds one-to-one with some or all of the aforementioned openings 102. The cam portion 109 and the corresponding opening 102 are in the same cross section.

[0068] In this embodiment, pistons 104 are provided at different openings 102 of the housing 101 of the switcher 100. Each piston 104 is provided with a sealing structure 106 that blocks the corresponding opening 102. Each piston 104 is provided with a through hole. The rotating rod 108 passes through each through hole in sequence. The part of the rotating rod 108 that passes through each through hole is provided with a cam part 109 for driving the corresponding piston 104 to move.

[0069] In this embodiment, the inner wall of the through hole of the piston 104 is provided with a protrusion 127 that protrudes toward the center of the through hole and abuts against the cam portion 109. The protrusion 127 is located on the side of the inner wall of the through hole away from the opening 102. Preferably, in this embodiment, a spring unit 105 is provided between the piston 104 and the inner wall of the housing 101. The spring applies a pushing force to the piston 104 toward the opening 102, which is used to push the sealing structure 106, such as the sealing ring provided on the piston 104, to close the opening 102.

[0070] This embodiment can also be configured as follows: multiple openings 102 are provided on different side walls of the housing 101 of the switcher 100; when each opening 102 is located at a different cross section of the housing 101, the moving direction of the piston 104 of the openings 101 on different side walls needs to be differentiated, but it must be ensured that the axis of each opening 102 on each side wall of the housing 101 of the switcher 100 is perpendicular to the axis of the rotating rod 108; of course, to ensure the opening and closing effect, a perpendicular setting is preferred, but if only for opening and closing control, it is sufficient to set the axis of the opening 102 to intersect the axis of the rotating rod 108. With the above configuration, a single rotating rod 108 can be used to control the opening and closing of multiple openings 102 on different side walls, realizing the combined switching of the connection status of each opening 102 (not shown in the figures).

[0071] In this embodiment, the switcher can also be configured as follows: the chamber 103 of the housing 101 is provided with two or more rotating rods 108, and each rotating rod 108 is provided with a cam portion 109 for controlling the relative extension and retraction of different or the same pistons 104, so as to achieve the purpose that different rotating rods 108 can control the same opening 102, or different rotating rods 108 can control different openings 102 separately, thereby further increasing the number of opening and closing combinations of each opening 102 of the switcher 100 (not shown in the figures).

[0072] In this embodiment, the switcher can also be configured as follows: Figures 1 to 9 As shown, the housing 101 is provided with multiple chambers 103, and each chamber 103 is provided with at least one rotating rod 108. Each chamber 103 has at least one opening 102. The rotating rod 108 in each chamber 103 pushes the corresponding piston 104 to move and extend via the cam part 109, thereby controlling the opening and closing of each opening 102 in the chamber 103. This enables the switch 100 to control two or more sets of passages separately.

[0073] like Figures 1 to 9As shown, in this embodiment, a motor 110 is provided on the housing 101. The output end of the motor 110 is directly or via a transmission structure connected to the rotating rod 108 to drive the rotating rod 108 to rotate around the axis and control the rotation angle of the rotating rod 108, so as to achieve precise control of the rotation position of the rotating rod 108. Then, when the rotating rod 108 rotates to different rotation positions, the cam part 109 pushes different pistons 104 to move, thereby achieving the effect of controlling the opening and closing of different openings 102 on the switcher 100 respectively.

[0074] Preferably, in this embodiment, the end of the rotating rod 108 extends out of the housing 101, and the end extends out and is connected to the output end of the motor 110 installed on the outside of the housing via the reduction gear set 121, so as to achieve precise control of the rotation position of the rotating rod 108 and thus achieve a significant technical advancement in improving the control accuracy of the switch 100.

[0075] Example 3

[0076] like Figures 1 to 9 As shown, this embodiment introduces a switch 100, which includes a housing 101 with a hollow chamber 103 inside; the housing 101 has a mounting hole 120 for a rotating rod 108 to pass through, and the part of the rotating rod 108 passing through the mounting hole 120 is fitted with two sealing rings in sequence; there is a pressure relief chamber 115 between the outer wall of the rotating rod 108 and the inner wall of the mounting hole 120 between the two sealing rings, and the housing 101 has a pressure relief port 117 that connects the pressure relief chamber 115 to the outside of the chamber 103.

[0077] With the above settings, after the sealing ring of the switch 100 fails, the water leaking from the point where the rotating rod 108 protrudes can be diverted to other locations through the pressure relief chamber 115, effectively preventing water leakage directly from the point where the rotating rod 108 protrudes. At the same time, by connecting the pressure relief chamber to the outside of the chamber through the pressure relief port, the pressure in the chamber at the point where the rotating rod protrudes is significantly reduced, thereby effectively preventing water leakage from the point where the rotating rod protrudes.

[0078] like Figures 7 to 9 As shown, in this embodiment, the outer wall of the rotating rod 108 is provided with a groove 116, the groove 116 is open and faces the inner wall of the mounting hole 120, the groove 116 is located between two sealing rings, and the groove 116 and the inner wall of the mounting hole 120 form a pressure relief cavity 115; the groove 116 is arranged around the outer periphery of the rotating rod 108, and the groove 116 can be continuously or discontinuously extended for at least one turn.

[0079] In this embodiment, a groove 116 may be provided on the inner wall of the mounting hole 120. The opening of the groove 116 faces the outer wall of the rotating rod 108. The groove 116 is located between two sealing rings, and the groove 116 and the outer wall of the rotating rod 108 form a pressure relief cavity 115. The groove 116 is arranged around the inner circumference of the mounting hole 120, and the groove 116 may be continuously or discontinuously extended for at least one circle, which can also achieve the above-mentioned invention objective.

[0080] In this embodiment, a sealing ring is fitted around the outer periphery of each end of the portion of the rotating rod 108 that passes through the mounting hole 120. The inner and outer periphery of the sealing ring are respectively sealed and fitted to the outer wall of the rotating rod 108 and the inner wall of the mounting hole 120. The inner sealing ring 113 is provided at the end near the chamber 103, and the outer sealing ring 114 is provided at the end away from the chamber 103. The pressure relief chamber 115 is located between the inner and outer sealing rings 113 and 114, and is connected to the space between the inner and outer sealing rings 113 and 114.

[0081] In this embodiment, the inner wall of the mounting hole 120 is provided with a radially outwardly recessed notch. The notch is in the same cross section as the inner sealing ring 113 and is used to connect the two sides of the inner sealing ring 113. Preferably, multiple notches are arranged circumferentially on the inner wall of the mounting hole 120. By providing a notch on the inner circumferential side wall of the mounting hole 120 to connect the two sides of the inner sealing ring 113, some water in the chamber 103 can flow into the pressure relief chamber 115 through the notch, thereby reducing the water pressure near the point where the rotating rod 108 passes through the chamber and effectively reducing the occurrence of leakage faults in the switch 100.

[0082] like Figures 7 to 9 As shown, in this embodiment, the housing 101 of the switcher 100 is provided with an independent high-pressure chamber 111 and a low-pressure chamber 112. A rotating rod 108 is provided inside the high-pressure chamber 111. A pressure relief chamber 115 is provided at the portion of the rotating rod 108 that extends out of the high-pressure chamber 111. The pressure relief port 117 of the pressure relief chamber 115 is connected to the low-pressure chamber 112 via a pressure relief channel 118. Through this arrangement, all water flowing out of the pressure relief chamber 115 can flow into the low-pressure chamber 112, achieving effective collection of the pressure-relieved water. Simultaneously, it effectively reduces the water pressure at the point where the rotating rod 108 exits the high-pressure chamber 111, effectively preventing water leakage from the point where the rotating rod 108 exits.

[0083] In this embodiment, a second rotating rod is provided inside the low-pressure chamber 112, with the end of the second rotating rod extending out of the low-pressure chamber 112. A sealing ring is provided on the outer peripheral wall of the part of the second rotating rod 112 that extends out. The low-pressure chamber 112 is provided with a communication port 119 that communicates with the pressure relief channel 118. The communication port 119 is positioned close to the center of the low-pressure chamber 112 relative to the sealing ring, so that the liquid flowing out of the high-pressure chamber through the pressure relief channel can flow into the low-pressure chamber, thereby achieving the effect of effectively collecting the pressure relief water flow.

[0084] In this embodiment, the low-pressure chamber 112 is connected to the outside atmosphere through a pressure relief port equipped with a pressure relief valve 122, so as to reduce the air pressure in the low-pressure chamber as much as possible and make it consistent with the outside atmosphere; preferably, the pressure relief port is located close to the connection port 119.

[0085] In this embodiment, the switch 100 is the switch structure described in Embodiment 1 or 2 above, and has the technical features of the switch described in Embodiment 1 or 2 above.

[0086] Example 4

[0087] This embodiment introduces a dispensing device, which is equipped with the switcher described in any of the above embodiments. Different openings of the switcher are connected to different water channels of the dispensing device, and are used to control the dispensing of different additives, either individually or in combination, into different water channels, so as to improve the dispensing diversity of the dispensing device.

[0088] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. The implementation schemes in the above embodiments can be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A switch, comprising: The shell is hollow, forming a cavity, and has multiple openings on its surface that communicate with the cavity. Its features are: The switcher's housing contains independent high-pressure and low-pressure chambers. The high-pressure chamber contains a rotating rod that can rotate around an axis. The rotating rod has multiple cams that open opposite different openings. Each cam drives a corresponding piston to extend and retract relative to its opening, controlling the sealing structures on different pistons to close or open their respective openings. The portion of the rotating rod extending out of the high-pressure chamber has a pressure relief chamber. The pressure relief port of this chamber is connected to the low-pressure chamber via a pressure relief channel. The housing has a mounting hole through which the rotating rod passes. Two sealing rings are sequentially fitted onto the portion of the rotating rod passing through the mounting hole. A pressure relief chamber exists between the outer wall of the rotating rod and the inner wall of the mounting hole, and the housing has a pressure relief port connecting this chamber to the outside. A second rotating rod is provided in the low-pressure chamber, and the end of the second rotating rod extends out of the low-pressure chamber. A sealing ring is provided on the outer peripheral wall of the part of the second rotating rod that extends out. The low-pressure chamber is provided with a communication port that is connected to the pressure relief channel. The communication port is located near the center of the low-pressure chamber relative to the sealing ring. The low-pressure chamber is connected to the outside atmosphere via a pressure relief port equipped with a pressure relief valve.

2. The switch of claim 1, wherein The cam sections on the rotating rod are arranged in an alternating pattern along the axis of the rotating rod.

3. The switch of claim 2 wherein, The radial protrusion orientations of different cam sections relative to the axis of the rotating rod may be the same or different.

4. The switch of claim 2 wherein, The housing has multiple openings on one side, which are spaced apart along a straight line. The axis of the rotating rod inside the cavity is parallel to the straight line. The rotating rod has a cam part that corresponds to some or all of the openings. The cam part and the corresponding opening are in the same cross section.

5. The switch of claim 4 wherein, Pistons are provided at different openings, and each piston is provided with a sealing structure that seals the corresponding opening. Each piston is provided with a through hole, and a rotating rod passes through each through hole in sequence. The part of the rotating rod that passes through each through hole is provided with a cam part for driving the corresponding piston to move.

6. A switch as claimed in claim 5, wherein The piston has a protrusion on the inner wall of the through hole that protrudes toward the center of the through hole and abuts against the cam part. The protrusion is located on the side of the inner wall of the through hole away from the opening.

7. The switch of claim 6 wherein, A spring is provided between the piston and the inner wall of the housing. The spring applies a pushing force to the piston in the direction of the opening, which is used to push the sealing ring on the piston to close the opening.

8. The switch of claim 2 wherein, Multiple openings are provided on different side walls of the shell, and each opening is located in a different cross section of the shell.

9. A switch as claimed in any one of claims 1 to 8, wherein The housing contains two or more rotating rods, each with a cam portion that controls the relative extension and retraction of different or identical pistons.

10. A switch as claimed in any one of claims 1 to 8, wherein The housing has multiple chambers, each with a rotating rod and at least one opening. The rotating rods in each chamber push the corresponding pistons to extend and retract via a cam section, controlling the opening and closing of the corresponding openings.

11. A switch as claimed in any one of claims 1 to 8, wherein The housing is equipped with a drive motor, the output end of which is directly or via a transmission structure connected to the rotating rod to drive the rotating rod to rotate around the axis.

12. The switch of claim 11, wherein, The end of the rotating rod extends out of the housing, and the extended end is connected to the output end of the drive motor via a reduction gear set.

13. A delivery device characterized by: The switcher of any one of claims 1 to 12 is installed on the water supply device, and different openings of the switcher are respectively connected with different water paths of the water supply device, so as to control the selective or combined addition of different additives into different water paths.

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