A switch and a delivery device

Abstract

The application provides a switch, which comprises a shell with a hollow chamber inside; the shell is provided with a mounting hole through which a rotating rod passes, and the part of the rotating rod passing through the mounting hole is sequentially sleeved with two sealing rings; the outer wall of the rotating rod between the two sealing rings and the inner wall of the mounting hole have a pressure relief cavity, and the shell is provided with a pressure relief opening for connecting the pressure relief cavity with the outside. Through the above arrangement, the pressure at the position where the chamber is provided with the rotating rod is significantly reduced, thereby effectively preventing the occurrence of the leakage of the chamber from the position where the rotating rod passes out. The application also provides a delivery device provided with the switch, and different openings of the switch are connected with different water paths of the delivery device, so as to control the delivery of different additives to different water paths in a selective or combined manner.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of clothes processing equipment, and particularly relates to an additive feeding device for a washing machine. BACKGROUND

[0002] With the improvement of consumers' quality of life, washing machines have been inseparable from people's life. In the process of using the washing machine, different types of additives need to be selected according to different programs, and different water routes are used to feed the washing machine through the corresponding feeding device. In this process, the additive feeding device of the washing machine needs to have a plurality of switchable water route combination forms.

[0003] However, in the traditional automatic feeding device, the feeding of one type of additive usually requires one pump, and the more types of detergents need more pumps. At the same time, in the transmission of the washing machine feeding device, a corresponding control valve is usually provided for different water supply routes to meet the needs of different washing functions.

[0004] In the above case, in order to meet the complete functional requirements of the washing machine feeding device, a plurality of pumps and a plurality of water inlet valves are usually required. Such a scheme requires a large number of electrical components, complex control, high cost, and high failure rate.

[0005] Therefore, the applicant proposes a switcher. The switcher controls the on-off of the water route in the switcher through a motor, randomly combines different connection channels, and realizes the output of multiple water routes, thereby greatly reducing the number of electrical components.

[0006] However, in the process of using the above-mentioned switcher, the position where the rotating shaft penetrates out of the shell is prone to water leakage due to poor sealing, especially in high-pressure working conditions. The sealing ring is prone to wear and tear during use, which causes the problem of effectiveness.

[0007] Therefore, the present application is proposed. SUMMARY

[0008] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art and provide a switcher to prevent water leakage during operation.

[0009] To solve the above technical problems, the basic idea of the technical scheme of the present application is as follows:

[0010] The switch comprises a housing with a hollow chamber inside; the housing is provided with a mounting hole through which a rotating rod passes, and the part of the rotating rod passing through the mounting hole is sequentially sleeved with two sealing rings; the rotating rod outer wall between the two sealing rings and the mounting hole inner wall has a pressure relief cavity, and the housing is provided with a pressure relief opening for connecting the pressure relief cavity with the outside.

[0011] Further, the rotating rod outer wall is provided with a groove, the groove is open towards the mounting hole inner wall direction, the groove is between the two sealing rings, and the groove and the mounting hole inner wall form a pressure relief cavity; the groove is arranged around the outer periphery of the rotating rod, and the groove can be continuous or discontinuous for at least one turn.

[0012] Further, the mounting hole inner wall is provided with a groove, the groove is open towards the rotating rod outer wall direction, the groove is between the two sealing rings, and the groove and the rotating rod outer wall form a pressure relief cavity; the groove is arranged around the inner periphery of the mounting hole, and the groove can be continuous or discontinuous for at least one turn.

[0013] Further, the outer periphery of the part of the rotating rod passing through the mounting hole is sleeved with a sealing ring at both ends, and the inner and outer peripheries of the sealing ring are sealingly attached to the rotating rod outer wall and the mounting hole inner wall, respectively; the one closer to the chamber is an inner sealing ring, and the one farther away from the chamber is an outer sealing ring; the pressure relief cavity is between the inner and outer sealing rings and is connected with the space between the inner and outer sealing rings.

[0014] Further, the inner wall of the mounting hole is provided with a radial outwardly recessed notch, the notch and the inner sealing ring are in the same cross section, and the notch is used to connect the two sides of the inner sealing ring; preferably, the inner wall of the mounting hole is circumferentially spaced apart and provided with a plurality of notches.

[0015] Further, the housing of the switch is internally provided with a high-pressure chamber and a low-pressure chamber which are independent of each other, the high-pressure chamber is internally provided with a rotating rod, the part of the rotating rod passing out of the high-pressure chamber is provided with a pressure relief cavity, and the pressure relief opening of the pressure relief cavity is connected with the low-pressure chamber through a pressure relief channel.

[0016] Further, the low-pressure chamber is internally provided with a second rotating rod, the end of the second rotating rod passes out of the low-pressure chamber, and the outer periphery wall of the part of the second rotating rod passing out is provided with a sealing ring; the low-pressure chamber is provided with a communication opening connected with the pressure relief channel, and the communication opening is arranged close to the center of the low-pressure chamber relative to the sealing ring.

[0017] Further, the low-pressure chamber is connected with the outside atmosphere through the pressure relief opening provided with a pressure relief valve; preferably, the pressure relief opening is arranged close to the communication opening.

[0018] Further, the shell is hollow to form a chamber, the shell is provided with a plurality of openings in communication with the chamber, a rotating rod rotatable around an axis is installed in the chamber, a plurality of cam portions are provided on the rotating rod and correspond to the openings, each cam portion drives a corresponding piston to move in and out of the opening, and the sealing structure provided on the piston is used to close or open the corresponding opening.

[0019] Compared with the prior art, the present application has the following significant technical progress by adopting the above technical means:

[0020] Through the above arrangement, when the sealing ring of the switch fails, the water leaking from the rotating rod can be drained to other positions through the pressure relief chamber, effectively avoiding the direct leakage of water from the rotating rod; at the same time, by connecting the pressure relief chamber with the outside of the chamber through the pressure relief port, the pressure of the chamber at the position where the rotating rod passes out is significantly reduced, thereby effectively preventing the leakage of water from the chamber at the position where the rotating rod passes out.

[0021] The present application also provides a dispensing device, which is provided with the switch described above, and the different openings of the switch are connected with different water paths of the dispensing device, respectively, for controlling the dispensing of different additives to different water paths.

[0022] At the same time, the present application has the advantages of simple structure and significant effect, and is suitable for popularization and use.

[0023] The specific embodiments of the present application will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings are part of the present application and serve to provide a further understanding of the present application, the illustrative embodiments of the present application and their descriptions serve to explain the present application, but do not constitute an improper limitation on the present application. Obviously, the drawings described below are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor. In the drawings:

[0025] Figure 1 is a structural schematic view of the switch in the embodiment of the present application;

[0026] Figure 2 is a top view structural schematic view of the switch in the embodiment of the present application;

[0027] Figure 3 is a structural schematic view of the A-A section of Figure 2 in the embodiment of the present application;

[0028] Figure 4 is a structural schematic view of the B-B section of Figure 2 in the embodiment of the present application;

[0029] Figure 5 is a schematic view of the amplification structure at C in the embodiment of the present application Figure 3

[0030] Figures 6a to 6d is a schematic view of the rotating rod rotating to different azimuth states at D in the embodiment of the present application Figure 4

[0031] Figure 7 is a schematic view of the cover plate removed state of the pressure relief channel of the switch in the embodiment of the present application

[0032] Figure 8 is a schematic view of the cover plate removed state of the pressure relief channel of the switch in the embodiment of the present application

[0033] Figure 9 is a schematic view of the E-E cross section in the embodiment of the present application Figure 8

[0034] Explanation of main elements in the figure:

[0035] 100, switch; 101, housing; 102, opening; 103, chamber; 104, piston; 105, elastic unit; 106, sealing structure; 107, guide portion; 108, rotating rod; 109, cam portion; 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, communication port; 120, mounting hole; 121, speed reduction gear set; 122, pressure relief valve; 123, limiting column; 124, mounting groove; 125, sealing ring; 126, piston head; 127, protruding portion.

[0036] It should be noted that these drawings and written descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0038] ​​​In the description of the present application, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0039] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] The switching device 100 introduced in the embodiments of the present application can be applied to reversing switching of different flow channels, water channels and air channels, to realize the effect of reversing and adjusting the flow direction of fluid flow. For example, the switching device 100 is installed on the additive feeding device of a washing machine, to realize the effect of feeding different types of additives selectively or in combination; and / or, the single or combined additives are fed to the washing machine through different water channels in different feeding forms.

[0041] As shown in Figures 1 to 9 The switching device 100 has a housing 101, and the housing 101 is hollow inside to form a chamber 103. The housing 101 has a plurality of openings 102, each of which is in communication with the chamber 103. Some or all of the openings 102 are respectively and one-to-one provided with a piston 104 capable of opening and closing the opening 102. Each piston 104 can be driven by a camshaft structure provided on the switching device 100 to produce relative displacement, thereby realizing controllable opening and closing operation of different openings 102 and combination switching of the communication forms of the openings 102 of the switching device 100.

[0042] In the embodiments of the present application, the camshaft structure is a rotating rod 108 installed in the chamber 103 of the housing 101 and capable of rotating around the shaft. The cam portion 109 provided on the rotating rod 108 drives the piston to move, thereby realizing the effect of opening and closing operation of each opening.

[0043] In the present application, the opening and closing control of the opening 102 of the switcher 100 is realized by the movement of the piston 104. During the movement of the piston 104, the sealing structure 106 (for example, a piston, a sealing ring, etc.) on the piston 104 does not come into contact with the inner wall of the shell 101 of the switcher 100, thereby avoiding the deformation and failure of the sealing structure 106 made of rubber or other elastic materials due to the friction and extrusion of the inner wall of the shell 101 of the switcher 100 during the opening and closing process.

[0044] Embodiment one

[0045] As Figure 1 As shown in FIG. 6, the control valve structure in the present embodiment can be a control device for controlling the opening and closing of any opening 102 of the switcher 100. Of course, it can also be used alone and applied to other devices.

[0046] In the present embodiment, the control valve structure comprises a shell 101, the shell 101 is hollow to form a chamber 103, the shell 101 is provided with an opening 102 communicating with the chamber 103, and a piston 104 is installed in the chamber 103 and can move in and out relative to the opening 102; a driving structure is installed on the shell 101 to drive the piston 104 to move, and is used to control the sealing structure 106 provided on the piston 104 to close or open the opening 102.

[0047] As Figure 1 As shown in FIG. 6, the driving structure in the present embodiment comprises,

[0048] A rotating rod 108 is installed in the chamber 103 and can rotate around the shaft under the driving of the power unit;

[0049] The rotating rod 108 is provided with a cam portion 109 protruding radially, the cam portion 109 at least partially overlaps the piston 104 in the axial direction of the rotating rod 108, and 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 rotating rod 108 can drive the piston 104 to move in and out during rotation by using the cam portion 109.

[0050] As Figures 6a to 6d As shown in the present embodiment, the piston 104 is provided with a through hole through which the rotating rod 108 passes, the rotating rod 108 is provided with a radial protruding convex rib at the position passing through the through hole, and the convex rib constitutes the cam portion 109; the piston 104 and the rotating rod 108 jointly constitute a cam transmission structure, and when the convex rib abuts against the inner wall of the through hole of the piston 104 during the rotation of the rotating rod 108, the piston 104 is pushed to move and drives the sealing structure 106 to open the corresponding opening.

[0051] 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.

[0052] like Figure 1 As shown in Figure 6, 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] Preferably, in the 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. Further preferably, the sealing structure 106, the elastic unit 105, and the piston 104 are coaxially arranged with the opening 102.

[0057] In the embodiment, the inner circumferential wall of the through hole in the middle of the piston 104 is provided with a protruding portion 127 protruding radially towards the center of the through hole. The protruding portion 127 is arranged on the side of the through hole close to the support end. The cam portion 109 of the rotating rod 108 can 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.

[0058] Preferably, as shown in Figures 6a to 6d In the embodiment, the protruding portion 127 is a triangular protrusion inclined from the left and right sides to the center, so that the two inclined surfaces can effectively guide the cam portion 109 and avoid imbalance of the piston 104 during movement.

[0059] As shown in Figures 6a to 6d In the embodiment, the inner wall of the housing 101 on the side towards which the support end of the piston 104 faces is provided with a limiting column 123 protruding axially along the opening 102. One end of the spring clamped between the support end of the piston 104 and the inner wall of the housing 101 is connected to the limiting column 123. In the embodiment, the support end of the piston 104 is provided with a mounting groove 124 open towards the limiting column 123. One end of the spring constituting the elastic unit 105 is inserted into the mounting groove 124, and the other end is sleeved on the outer circumferential wall of the limiting column 123.

[0060] As shown in Figure 1 In the embodiment, the chamber 103 is provided with a guide portion 107 for guiding the piston 104 to move in extension and retraction along the axial direction of the opening 102, so that the piston 104 can only move axially along the opening 102 during extension and retraction, thereby effectively avoiding deviation of the piston 104 and inability to be driven and controlled by the rotating rod 108.

[0061] In the embodiment, the inner wall of the housing 101 is provided with a piston groove extending along the axial direction of the opening 102 and constituting the 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 other than the non-piston sealing end and the support end. Preferably, the side wall of the piston 104 is parallel to the axial direction of the rotating rod 108.

[0062] 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.

[0063] Example 2

[0064] like Figures 1 to 9 As 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] In the embodiment, the different openings 102 of the housing 101 of the switcher 100 are respectively provided with pistons 104, each of the pistons 104 is respectively provided with a sealing structure 106 corresponding to the sealing of the corresponding opening 102, each of the pistons 104 is respectively provided with a through hole, and the rotating rod 108 sequentially passes through each of the through holes, and the part of the rotating rod 108 passing through each of the through holes is respectively provided with a cam portion 109 for driving the corresponding piston 104 to move.

[0070] In the embodiment, the inner wall of the through hole of the piston 104 is provided with a protruding portion 127 protruding to the center of the through hole and corresponding to the abutment of the cam portion 109, and the protruding portion 127 is arranged on the side of the inner wall of the through hole away from the opening 102; preferably, in the embodiment, a spring force unit 105 composed of a spring is arranged between the piston 104 and the inner wall of the housing 101, and the spring applies a pushing force to the piston 104 in the direction close to the opening 102, for pushing the sealing structure 106 composed of the sealing ring arranged on the piston 104 to close the opening 102.

[0071] The embodiment can also be provided as follows: a plurality of openings 102 are respectively arranged on different side walls of the housing 101 of the switcher 100; when each of the openings 102 is respectively arranged on different cross sections of the housing 101, the moving directions of the pistons 104 arranged on the openings 101 on different side walls need to be differentially arranged, but the axes of the openings 102 arranged on each side wall of the housing 101 of the switcher 100 are perpendicular to the axis of the rotating rod 108; of course, in order to ensure the opening and closing effect, the perpendicular arrangement is preferred, but if only the opening and closing control is needed, the axes of the openings 102 can be staggered with the axis of the rotating rod 108. After using the above arrangement, a single rotating rod 108 can be used to control the opening and closing of the plurality of openings 102 on different side walls, and the combination switching of the communication states of each of the openings 102 can be realized (not marked in the drawings).

[0072] In the embodiment, the switcher can also be provided as follows: two or more rotating rods 108 are arranged in the cavity 103 of the housing 101, and each of the rotating rods 108 is provided with a cam portion 109 for controlling the relative extension and contraction movement of different or same pistons 104, so as to realize the purpose that different rotating rods 108 can control the same opening 102 or different rotating rods 108 can control different openings 102, and further improve the number of opening and closing combinations of each of the openings 102 of the switcher 100 (not marked in the drawings).

[0073] In the embodiment, the switcher can also be provided as follows: Figures 1 to 9As shown, the housing 101 has multiple chambers 103, and each chamber 103 has 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 extend and retract 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.

[0074] like Figures 1 to 9 As 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.

[0075] 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 direction of the rotating rod 108 and thus achieve a significant technical advancement in improving the control accuracy of the switch 100.

[0076] Example 3

[0077] 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.

[0078] 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.

[0079] like Figures 7 to 9As 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] In the embodiment, the low-pressure chamber 112 is provided with a second rotating rod, the end of the second rotating rod is arranged to pass through the low-pressure chamber 112, and a sealing ring is arranged on the outer circumferential wall of the second rotating rod 112; the low-pressure chamber 112 is provided with a communication port 119 connected with the pressure relief channel 118, the communication port 119 is arranged close to the center of the low-pressure chamber 112 relative to the sealing ring, so that the liquid flowed out of the high-pressure chamber through the pressure relief channel can flow into the low-pressure chamber, and the effect of effectively collecting the pressure relief water flow is realized.

[0085] In the embodiment, the low-pressure chamber 112 is connected with the external atmosphere through the pressure relief port provided with the 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 external atmosphere; preferably, the pressure relief port is arranged close to the communication port 119.

[0086] In the embodiment, the switcher 100 is the switcher structure in the above-mentioned embodiment one or two, and has the technical features of the switcher in the above-mentioned embodiment one or two.

[0087] Embodiment four

[0088] In the embodiment, a delivery device is introduced, which is provided with the switcher in any of the above-mentioned embodiments, different openings of the switcher are connected with different water channels of the delivery device, and the switcher is used to control the delivery of different additives to different water channels in an alternative or combined manner, so as to improve the delivery diversity of the delivery device.

[0089] The above-mentioned is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with the preferred embodiment, it is not intended to limit the present application, and any person skilled in the art can make some changes or modifications to the above-mentioned technical content without departing from the technical solution of the present application, and the equivalent embodiments with equivalent changes are equivalent. The embodiments in the above-mentioned embodiments can be further combined or replaced, as long as they do not depart from the technical solution of the present application. Any simple modification, equivalent change and modification of the above-mentioned embodiments according to the technical essence of the present application are still within the scope of the present application.

Claims

1. A switcher comprising a housing with a hollow chamber inside; the housing is provided with a mounting hole for a rotating rod to pass through, and the part of the rotating rod passing through the mounting hole is sequentially sleeved with two sealing rings; characterized in that: The outer wall of the rotating rod between the two sealing rings and the inner wall of the mounting hole have a pressure relief cavity, and the shell is provided with a pressure relief opening for connecting the pressure relief cavity with the outside; The shell of the switch is internally provided with a high-pressure chamber and a low-pressure chamber which are independent of each other, the high-pressure chamber is internally provided with a rotating rod, the part of the rotating rod which penetrates out of the high-pressure chamber is provided with a pressure relief cavity, and the pressure relief opening of the pressure relief cavity is connected with the low-pressure chamber through a pressure relief channel; The low-pressure chamber is internally provided with a second rotating rod, the end of the second rotating rod penetrates out of the low-pressure chamber, and the outer circumferential wall of the part of the second rotating rod which penetrates out is provided with a sealing ring; the low-pressure chamber is provided with a communication opening which is connected with the pressure relief channel, and the communication opening is arranged close to the center of the low-pressure chamber relative to the sealing ring; The low-pressure chamber is connected with the outside atmosphere through a pressure relief opening in which a pressure relief valve is mounted, and the pressure relief opening of the low-pressure chamber is arranged close to the communication opening.

2. The switch of claim 1, wherein The outer wall of the rotating rod is provided with a groove, the opening of the groove faces the inner wall of the mounting hole, the groove is between the two sealing rings, and the groove and the inner wall of the mounting hole surround the pressure relief cavity; the groove is arranged around the outer periphery of the rotating rod, and the groove can be continuous or discontinuous and extend at least one circle.

3. The switch of claim 1 wherein, The inner wall of the mounting hole is provided with a groove, the opening of the groove faces the outer wall of the rotating rod, the groove is between the two sealing rings, and the groove and the outer wall of the rotating rod surround the pressure relief cavity; the groove is arranged around the inner periphery of the mounting hole, and the groove can be continuous or discontinuous and extend at least one circle.

4. A switch as claimed in any one of claims 1 to 3, wherein The outer periphery of the part of the rotating rod which penetrates through the mounting hole is respectively sleeved with a sealing ring, the inner and outer peripheries of the sealing ring are respectively sealed and fitted with the outer wall of the rotating rod and the inner wall of the mounting hole; the one which is close to one end of the chamber is an inner sealing ring, and the one which is away from one end of the chamber is an outer sealing ring; the pressure relief cavity is between the inner and outer sealing rings and is connected with the space between the inner and outer sealing rings.

5. The switch of claim 4 wherein, The inner wall of the mounting hole is provided with a radial outward recess, the recess and the inner sealing ring are in the same cross section, and the recess is used for connecting the two sides of the inner sealing ring.

6. The switch of claim 5 wherein, The inner wall of the mounting hole is circumferentially and interval arranged with a plurality of recesses.

7. A switch as claimed in any one of claims 1 to 3, wherein The shell is hollow to form a chamber, the shell is provided with a plurality of openings which are connected with the chamber, the chamber is internally mounted with a rotating rod which can rotate around an axis, the rotating rod is provided with a plurality of cam portions which are respectively and correspondingly arranged with respect to the different openings, each cam portion drives a corresponding piston to extend and retract with respect to the opening, and the different pistons are used for controlling the sealing structures arranged on the different pistons to close or open the corresponding openings.

8. A delivery device characterized by: The switch is mounted with the switch of any one of claims 1 to 7, and the different openings of the switch are respectively connected with different water paths of a feeding device, and are used for controlling the feeding of different additives to the different water paths in an alternative or combined manner.

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