CN115387089A - Switcher and putting device - Google Patents

Abstract

The present invention provides a switch, comprising: the casing, cavity constitution cavity in the casing, be equipped with a plurality of openings that are linked together with the cavity on the casing, but install pivoting's rotary rod in the cavity, be equipped with a plurality of cam portions of seting up with different openings relatively on the rotary rod, each cam portion drives the relative opening telescopic movement of piston that the one-to-one set up respectively for the seal structure who establishes on the control different pistons corresponds and seals or opens corresponding opening. The invention controls the rotation angle of the cam shaft structure arranged in the chamber of the switcher, and utilizes the cam on the cam shaft to drive the piston to generate relative displacement, thereby realizing the effects of controllable opening and closing operation of different openings on the switcher and combined switching of the communication form of each opening of the switcher, and further achieving the remarkable technical progress of improving the diversification of the working modes of the switcher. The invention also provides a feeding device provided with the switcher, which is used for controlling different additives to be fed to different water paths in a way of selecting or combining the different additives.

Description

Switcher and putting device

Technical Field

The invention belongs to the technical field of clothes treatment equipment, particularly relates to an additive feeding device for a washing machine, and particularly relates to a switcher applied to the washing machine and the feeding device.

Background

With the improvement of the quality of life of consumers, the washing machine has not left the lives of people. During the use of the washing machine, the corresponding types of additives are correspondingly selected according to different executed programs, and different water paths are used for feeding the additives into the washing machine through the corresponding feeding devices. In this process, the additive feeding device of the washing machine is required to have a plurality of switchable water path combination forms.

However, in the conventional automatic dispensing device, a pump is usually required for dispensing an additive, and the more pumps are required for dispensing detergent; meanwhile, in a driving washing machine putting device, control valves are usually provided for different water supply paths in a one-to-one correspondence manner, so as to meet the requirements of different washing functions.

Under the above circumstances, in order to meet the complete function requirement of the washing machine feeding device, a plurality of pumps and a plurality of water inlet valves are generally required to be installed, and the technical scheme has the advantages of large number of required electric devices, complex control, high cost and higher failure rate.

In view of this, this scheme especially provides a switch, and the switch passes through the break-make of an electric machine control individual water route in the switch, and the random combination forms different connecting channel to realize the output in multiple water route, greatly reduced the quantity of electrical part.

In view of the above, the present invention is particularly proposed.

Disclosure of Invention

The present invention is directed to overcome the shortcomings of the prior art, and provides a switch for performing various combined opening and closing control of different openings.

In order to solve the technical problems, the invention adopts the technical scheme that:

a switch, comprising: the device comprises a shell, wherein a cavity is formed in the shell, a plurality of openings communicated with the cavity are formed in the shell, a rotating rod capable of rotating around a shaft is installed in the cavity, a plurality of cam parts which are arranged opposite to different openings are arranged on the rotating rod, and the cam parts respectively drive pistons arranged in a one-to-one correspondence manner to stretch and move relative to the openings and are used for controlling sealing structures arranged on different pistons to correspondingly seal or open corresponding openings.

Furthermore, all cam parts arranged on the rotating rod are arranged in a staggered manner along the axial direction of the rotating rod; preferably, the radial projecting orientation of the different cam portions with respect to the axis of the rotary lever is the same, or differently arranged.

Furthermore, a plurality of openings are arranged on one side of the shell, the openings are arranged at intervals along a straight line, the axis of a rotating rod arranged in the cavity is parallel to the straight line, cam parts which are arranged corresponding to the partial or all openings one by one are arranged on the rotating rod, and the cam parts and the corresponding openings are positioned in the same cross section.

Furthermore, pistons are respectively arranged at different openings, sealing structures which correspondingly block the corresponding openings are respectively arranged on the pistons, through holes are respectively arranged on the pistons, the rotating rod sequentially penetrates through the through holes, and cam parts for driving the corresponding pistons to move are respectively arranged on the parts of the rotating rod penetrating through the through holes.

Furthermore, the inner wall of the through hole of the piston is provided with a convex part which is convex towards the center of the through hole and is correspondingly abutted against the cam part, and the convex part is arranged on one side of the inner wall of the through hole, which is far away from the opening; preferably, a spring is arranged between the piston and the inner wall of the shell, and applies a pushing elastic force to the piston in a direction close to the opening to push a sealing ring arranged on the piston to correspondingly seal the opening.

Furthermore, different side walls of the shell are respectively provided with a plurality of openings, and the openings are respectively positioned in different cross sections of the shell.

Furthermore, two or more rotating rods are arranged in the cavity of the shell, and each rotating rod is provided with a cam part for controlling different or same pistons to generate relative telescopic movement.

Furthermore, a plurality of cavities are arranged in the shell, rotary rods are arranged in different cavities respectively, at least one opening is formed in each different cavity, and the rotary rods in different cavities push corresponding pistons to stretch and move and control the opening and closing of the corresponding openings through the cam parts.

Further, a driving motor is arranged on the shell, and the output end of the driving motor is connected with the rotating rod directly or through a transmission structure and is used for driving the rotating rod to rotate around the shaft; preferably, the end of the rotating rod penetrates out of the shell, and the penetrating end is meshed and connected with the output end of the driving motor through the reduction gear set.

Compared with the prior art, the invention has the following remarkable technical progress after adopting the technical means:

the invention controls the rotation angle of the cam shaft structure arranged in the chamber of the switcher, and utilizes the cam on the cam shaft to drive the piston to generate relative displacement, thereby realizing the effects of controllable opening and closing operation of different openings on the switcher and combined switching of the communication form of each opening of the switcher, and further achieving the remarkable technical progress of improving the diversification of the working modes of the switcher.

The invention also discloses a dispensing device which is provided with any one of the switchers, wherein different openings of the switchers are respectively connected with different water paths of the dispensing device and are used for controlling different additives to be selected or combined to be dispensed to different water paths.

Meanwhile, the invention has simple structure and obvious effect and is suitable for popularization and application.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention to the proper form disclosed herein. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a schematic diagram of a switch according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a top view of a switch according to an embodiment of the present invention;

FIG. 3 isbase:Sub>A schematic structural view of section A-A of FIG. 2 in an embodiment of the present invention;

FIG. 4 is a schematic structural view of section B-B of FIG. 2 in an embodiment of the present invention;

FIG. 5 is an enlarged schematic view of FIG. 3 at C in an embodiment of the present invention;

fig. 6a to 6D are enlarged schematic structural diagrams illustrating the rotating rod in fig. 4 rotated to different orientations at D according to an embodiment of the present invention;

FIG. 7 is a schematic diagram illustrating a state of a switch with a cover removed from a pressure relief channel of the switch according to an embodiment of the present invention;

FIG. 8 is a schematic top view of a switch with a pressure relief channel cover removed;

fig. 9 is a schematic structural view of section E-E of fig. 8 in an embodiment of the present invention.

Description of the main elements in the figures:

100. a switch; 101. a housing; 102. an opening; 103. a chamber; 104. a piston; 105. an elastic unit; 106. a sealing structure; 107. a guide section; 108. rotating the rod; 109. a cam portion; 110. a motor; 111. a high pressure chamber; 112. a low pressure chamber; 113. an inner seal ring; 114. an outer sealing ring; 115. a pressure relief cavity; 116. a groove; 117. a pressure relief port; 118. a pressure relief channel; 119. a communication port; 120. mounting holes; 121. a reduction gear set; 122. a pressure relief valve; 123. a limiting post; 124. mounting grooves; 125. a seal ring; 126. a piston head; 127. a projection.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate it for those skilled in the art by reference to specific embodiments.

Detailed Description

In order to make the objects, 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 drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment of the invention discloses a switch 100, which can be applied to switching different flow channels, water channels and air paths, and achieves the effects of reversing and adjusting the flowing direction of fluid. For example: the switcher 100 is installed on an additive feeding device of a washing machine to realize the feeding of different types of additives by one or combination; and/or, the single or combined additive is added to the washing machine in different adding modes through different water paths.

As shown in fig. 1 to 9, in the embodiment of the present invention, the switch 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 opening 102 is communicated with the chamber 103, wherein a part or all of the openings 102 are respectively provided with a piston 104 capable of opening and closing the opening 102, each piston 104 can be driven by a camshaft structure arranged on the switch 100 to generate relative displacement, thereby realizing the effects of controllable opening and closing operations of different openings 102 and combined switching of the communication modes of the openings 102 of the switch 100.

In the embodiment of the present invention, the camshaft structure is a rotating rod 108 mounted in the chamber 103 of the housing 101 and capable of rotating around an axis, and the driving piston of a cam portion 109 provided on the rotating rod 108 moves, so as to achieve the effect of opening and closing each opening.

In the present invention, since the opening and closing of the opening 102 of the switch 100 is controlled by the movement of the piston 104, the sealing structure 106 (e.g., piston, gasket, etc.) on the piston 104 does not contact the inner wall of the housing 101 of the switch 100 during the movement of the piston 104, thereby preventing the sealing structure 106 made of elastic material such as rubber from deforming and failing due to friction and extrusion with the inner wall of the housing 101 of the switch 100 during the opening and closing.

Example one

As shown in fig. 1 to 6, the present embodiment describes a control valve structure, which may be a control device for controlling the opening and closing of any opening 102 of the switch 100; of course, the device can also be used independently and applied to other devices.

In this embodiment, the control valve structure includes: a housing 101, wherein the housing 101 is hollow to form a chamber 103, the housing 101 is provided with an opening 102 communicated with the chamber 103, and a piston 104 capable of performing telescopic movement relative to the opening is arranged in the chamber 103; the housing 101 is provided with a driving structure for driving the piston 104 to move, and is used for controlling the sealing structure 106 arranged on the piston 104 to correspondingly close or open the opening 102.

As shown in fig. 1 to 6, in the present embodiment, the driving structure includes,

a rotating rod 108 which is driven by the power unit and is arranged in the chamber 103 in a manner of rotating around a shaft;

the rotating rod 108 is provided with a cam part 109 protruding radially, the cam part 109 is at least partially overlapped with the piston 104 in the axial direction of the rotating rod 108, and the distance between the protruding end of the cam part 109 and the axis of the rotating rod 108 is greater than half of the distance between the piston 104 and the axis of the rotating rod 108, so that the cam part 109 can be used for driving the piston 104 to generate telescopic movement in the rotating process of the rotating rod 108.

As shown in fig. 6a to 6d, in the present 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 through the through hole, and the rib forms a cam portion 109; the piston 104 and the rotating rod 108 together form a cam transmission structure, and when the rotating rod 108 rotates until the convex rib abuts against the inner wall of the through hole of the piston 104, the piston 104 is pushed to move, and the sealing structure 106 is driven to open the corresponding opening.

In this embodiment, the driving structure further includes an elastic unit 105 clamped between the piston 104 and the housing 101, and providing an elastic restoring force for the piston 104 to seal the corresponding opening of the sealing structure 106, so that when the rotating rod 108 rotates to separate the rib from the inner wall of the through hole of the piston 104, the elastic unit 105 pushes the piston 104 to move, and the sealing structure 106 correspondingly seals the opening 102. In this embodiment, the elastic unit 105 may be a spring, a pneumatic cylinder, a hydraulic cylinder, or the like, and may provide any one or a combination of elastic restoring forces; preferably, the elastic unit 105 in this embodiment is a spring.

As shown in fig. 1 to fig. 6, in the present embodiment, the piston 104 is a block structure extending along the axial direction of the opening 102, a through hole is provided in the middle of the piston 104, the through hole penetrates through the piston, the axis of the rotating rod 108 is parallel to the axial direction of the through hole, and the through hole penetrates through the through hole, and a protruding rib protruding radially outwards is provided at the portion of the rotating rod 108 penetrating through the through hole, and the protruding rib forms a cam portion 109 for pushing the piston 104 to move telescopically.

In this embodiment, the axial direction of the through hole formed in the piston 104 is perpendicular to the axial direction of the opening 102, so that after the pushing force in the rotation direction of the rotating rod 108 is transmitted to the piston 104 through the cam structure, the piston 104 can generate pushing displacement along the radial direction of the rotating rod 108, and the effect that the piston 104 moves in an axial and telescopic manner along the opening 102 and corresponds to the opening 102 by using the sealing structure on the piston 104 is achieved.

In this embodiment, one end of the piston 104 close to the opening 102 is a sealing end, and the opposite end far from the opening 102 is a supporting end, and 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, and the sealing ring 125 is disposed coaxially with the opening 102 and can be in sealing contact with the inner wall of the cavity 103 at the 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 cylindrical piston head protruding outwards along the opening axis, and the sealing ring 125 is sleeved on the outer circumference of the piston head 126 and clamped and fixed on the piston head 126 by a ring of convex ribs protruding radially on the piston head 126.

In this embodiment, a spring constituting the elastic unit 105 is connected to the supporting end of the piston 104, the spring extending in the axial direction of the opening 102, and both ends of the spring are connected to the supporting end of the piston 104 and the inner wall of the housing 101, respectively.

Preferably, in this embodiment, the sealing structure 106 and the elastic unit 105 are coaxially disposed with the piston 104, so as to ensure that the piston does not deviate during the movement process and improve the sealing effect. Further preferably, the sealing structure 106, the elastic unit 105 and the piston 104 are coaxially disposed with the opening 102.

In this embodiment, the protrusion 127 protruding radially toward the center of the through hole is disposed on the inner peripheral wall of the through hole disposed in the middle of the piston 104, the protrusion 127 is disposed on one side of the through hole close to the support end, and the protrusion 127 enables the cam portion 109 of the rotating rod 108 to effectively push the piston 104 to move and lift the telescopic moving distance of the piston 104, thereby effectively realizing the effective closing and opening of the opening 102 by the sealing structure 106 on the piston 104.

Preferably, as shown in fig. 6a to 6d, in the present embodiment, the protrusion 127 is a triangular protrusion inclined from the left and right sides to the center, so that the inclined surfaces on the two sides can effectively guide the cam portion 109 and avoid unbalance during the operation of the piston 104.

As shown in fig. 6a to 6d, in the present embodiment, a limiting post 123 axially protruding along the opening 102 is disposed on a side of the inner wall of the casing 101, which is faced by the supporting end of the piston 104, and one end of the spring clamped between the supporting end of the piston 104 and the inner wall of the casing 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 opened toward the stopper 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 to the outer circumferential wall of the stopper post 123.

As shown in fig. 1 to 6, in the present embodiment, a guiding portion 107 is disposed in the chamber 103 for guiding the piston 104 to move telescopically along the axial direction of the opening 102, so as to ensure that the piston 104 does not incline in other directions during the telescopic movement process and can only move axially along the opening 102, thereby effectively avoiding the occurrence of situations such as the piston 104 being displaced and being unable to be driven and controlled by the rotating rod 108.

In this embodiment, the inner wall of the housing 101 is provided with a piston groove extending along the axial direction of the opening 102 and forming the guide portion 107, and the side wall of the piston 104 is correspondingly 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 supporting end, and preferably, the side wall of the piston 104 is the side parallel to the axial direction of the rotating rod 108.

In this embodiment, the opposite left and right side walls of the piston 104 are respectively inserted into the piston grooves of the inner wall of the corresponding side casing 101, and the piston grooves on both sides are arranged in parallel and extend along the parallel direction of the axis of the opening 102; preferably, the piston grooves on both sides are in the same cross section with 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, and further, the occurrence of the deflection of the piston 104 can be effectively avoided.

Example two

As shown in fig. 1 to 9, in the present embodiment, a switch 100 is disclosed, which includes: the hollow structure comprises a shell 101, a cavity 103 is formed in the shell 101, a plurality of openings 102 communicated with the cavity 103 are formed in the shell 101, a rotating rod 108 capable of rotating around an axis is installed in the cavity 103, a plurality of cam parts 109 which are arranged opposite to different openings 102 are formed in the rotating rod 108, and the cam parts 109 respectively drive pistons 104 which are correspondingly arranged one by one to move in a telescopic mode relative to the openings 102 and are used for controlling sealing structures 106 arranged on different pistons 104 to correspondingly seal or open the corresponding openings 102.

In this embodiment, the valve body structure provided at each opening 102 of the switch 100 and controlling 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 performing effective opening and closing control on the plurality of openings 102 by using the single rotating rod 108.

As shown in fig. 1 to 3, in the present embodiment, the cam portions 109 provided on the rotating rod 108 are arranged in a staggered manner along the axial direction of the rotating rod 108, and the cam portions 109 are respectively located at the cross sections of different openings 102 in a one-to-one correspondence manner, so as to perform effective opening and closing control on the corresponding openings 102.

Preferably, in this embodiment, the radial protruding orientations of the 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 to the corresponding orientations around the axis, the cam portions 109 are used to drive the pistons 104 at different openings 102 to perform the opening movement effect separately or simultaneously.

In this embodiment, a plurality of openings 102 are formed on one side of the housing 101 of the switch 100, the openings 102 are arranged at intervals along a straight line, an axis of a rotating rod 108 disposed in the chamber 103 is parallel to the straight line, cam portions 109 corresponding to some or all of the openings 102 are disposed on the rotating rod 108, and the cam portions 109 and the corresponding openings 102 are located in the same cross section.

In this embodiment, pistons 104 are respectively disposed at different openings 102 of a housing 101 of the switch 100, each piston 104 is provided with a sealing structure 106 correspondingly sealing the corresponding opening 102, each piston 104 is provided with a through hole, a rotating rod 108 sequentially passes through each through hole, and a portion of the rotating rod 108 passing through each through hole is provided with a cam portion 109 for driving the corresponding piston 104 to move.

In this embodiment, the inner wall of the through hole of the piston 104 is provided with a protrusion 127 protruding toward the center of the through hole and abutting against the cam portion 109, and the protrusion 127 is disposed on the side of the inner wall of the through hole away from the opening 102; preferably, in this embodiment, an elastic unit 105 formed by a spring is disposed between the piston 104 and the inner wall of the housing 101, the spring applies a pushing elastic force to the piston 104 in a direction close to the opening 102, and the spring is used for pushing a sealing structure 106 formed by a sealing ring or the like disposed on the piston 104 to correspondingly close the opening 102.

The present embodiment may further perform the following setting: a plurality of openings 102 are respectively formed on different side walls of the housing 101 of the switch 100; when the openings 102 are respectively positioned at different cross sections of the casing 101, the moving directions of the pistons 104 of the openings 101 arranged at different side walls need to be arranged differently, but it is ensured that the axes of the openings 102 arranged on the side walls of the casing 101 of the switcher 100 are all perpendicular to the axis of the rotating rod 108; of course, it is preferable to adopt a vertical arrangement for ensuring the opening and closing effect, but it is only necessary to arrange the axis of the opening 102 and the axis of the rotating lever 108 in a staggered arrangement for openable and closable control only. With 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, so as to realize the combined switching of the communication status of the openings 102 (not shown in the drawings).

In this embodiment, the switcher may be further configured as follows: two or more rotating rods 108 are disposed in the chamber 103 of the housing 101, and each rotating rod 108 is provided with a cam portion 109 for controlling different or the same piston 104 to move in a relative telescopic manner, 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, respectively, and further increase the number of opening and closing combinations of the openings 102 of the switch 100 (not shown in the drawings).

In this embodiment, the switcher may be further configured as follows: as shown in fig. 1 to 9, a plurality of chambers 103 are disposed in the housing 101, at least one rotating rod 108 is disposed in each of the chambers 103, at least one opening 102 is disposed in each of the chambers 103, and the rotating rods 108 in the different chambers 103 push the corresponding pistons 104 to move in an extending and contracting manner through the cam portions 109 to control opening and closing of the openings 102 in the chambers 103, so that the effect of the switch 100 in separately controlling two or more sets of passages can be achieved.

As shown in fig. 1 to 9, in the present embodiment, a motor 110 is disposed on the housing 101, an output end of the motor 110 is directly connected to the rotating rod 108 or connected to the rotating rod 108 through a transmission structure, and is used for driving the rotating rod 108 to rotate around an axis and controlling a rotation angle of the rotating rod 108, so as to achieve precise control of a rotation direction of the rotating rod 108, and further, when the rotating rod 108 rotates to different rotation directions, the cam portion 109 is used to push different pistons 104 to move, so as to achieve an effect of controlling opening and closing of different openings 102 on the switch 100 respectively.

Preferably, in this embodiment, an end of the rotating rod 108 penetrates through the housing 101, and the penetrating end is engaged with an output end of a motor 110 installed outside the housing through a reduction gear set 121, so as to achieve precise control of the rotating direction of the rotating rod 108, and further achieve significant technical improvement of the control precision of the lift switch 100.

EXAMPLE III

As shown in fig. 1 to 9, in the present embodiment, there is disclosed a switch 100, which includes a housing 101 having a hollow chamber 103 therein; a mounting hole 120 for the rotary rod 108 to pass through is formed in the shell 101, and two sealing rings are sequentially sleeved on the part of the rotary rod 108 passing through the mounting hole 120; a pressure relief cavity 115 is arranged between the outer wall of the rotating rod 108 between the two sealing rings and the inner wall of the mounting hole 120, and a pressure relief opening 117 for communicating the pressure relief cavity 115 with the outside of the cavity 103 is arranged on the shell 101.

Through the arrangement, after the sealing ring of the switcher 100 fails, water leaking from the penetrating part of the rotating rod 108 can be drained to other positions through the pressure relief cavity 115, so that the situations that water leaks from the penetrating part of the rotating rod 108 directly and the like are avoided effectively; simultaneously, through being linked together the pressure release chamber through pressure release mouth and cavity outside for the cavity supplies the pressure of rotary rod department of wearing to obtain showing and reduces, and then has effectively stopped the emergence of the chamber from the rotary rod department of wearing the condition of leaking.

As shown in fig. 7 to fig. 9, in the present embodiment, a groove 116 is formed on an outer wall of the rotating rod 108, an opening of the groove 116 faces a direction of an inner wall of the mounting hole 120, the groove 116 is located between two sealing rings, and a pressure relief cavity 115 is defined between the groove 116 and the inner wall of the mounting hole 120; the groove 116 is circumferentially disposed along the outer periphery of the rotary rod 108, and the groove 116 may extend at least one turn continuously or discontinuously.

In this embodiment, a groove 116 may be further disposed on an inner wall of the mounting hole 120, an opening of the groove 116 faces a direction of an outer side wall of the rotating rod 108, the groove 116 is located between two sealing rings, and a pressure relief cavity 115 is defined between the groove 116 and an outer wall of the rotating rod 108; the groove 116 is circumferentially disposed along the inner periphery of the mounting hole 120, and the groove 116 may extend at least one turn continuously or discontinuously, which also achieves the above-mentioned objects.

In this embodiment, the outer peripheries of both ends of the portion of the rotating rod 108 passing through the mounting hole 120 are respectively sleeved with a sealing ring, and the inner and outer peripheries of the sealing ring are respectively in sealing fit with the outer wall of the rotating rod 108 and the inner wall of the mounting hole 120; an inner sealing ring 113 is arranged at one end close to the cavity 103, and an outer sealing ring 114 is arranged at one end far away from the cavity 103; the pressure relief cavity 115 is located between the inner and outer sealing rings 113, 114 and communicates with the space between the inner and outer sealing rings 113, 114.

In this embodiment, the inner wall of the mounting hole 120 is provided with a notch which is recessed radially outward, and the notch and the inner seal ring 113 are located in the same cross section and are used for communicating two sides of the inner seal ring 113; preferably, a plurality of gaps are arranged on the inner wall of the mounting hole 120 at intervals along the circumferential direction. The openings for communicating the two sides of the inner sealing ring 113 are arranged on the inner peripheral side wall of the mounting hole 120, so that part of water in the chamber 103 can flow into the pressure relief cavity 115 through the openings, the water pressure in the chamber close to the penetrating position of the rotating rod 108 is reduced, and the leakage fault of the switcher 100 is effectively reduced.

As shown in fig. 7 to 9, in the present embodiment, a high pressure chamber 111 and a low pressure chamber 112 that are independent from each other are disposed inside a casing 101 of the switch 100, a rotating rod 108 is disposed inside the high pressure chamber 111, a pressure relief cavity 115 is disposed at a portion of the rotating rod 108 that penetrates through the high pressure chamber 111, and a pressure relief port 117 of the pressure relief cavity 115 is communicated with the low pressure chamber 112 through a pressure relief channel 118. Through the arrangement, the water flow flowing out of the pressure relief cavity 115 can completely flow into the low-pressure chamber 112, so that the effective collection of the pressure relief water flow is realized; simultaneously, still can effectively reduce the water pressure that the rotary rod 108 of high pressure chamber 111 wore out the department, effectively avoided rivers from the emergence of the circumstances such as rotary rod 108 department of wearing out leaks.

In this embodiment, a second rotating rod is arranged in the low-pressure chamber 112, an end of the second rotating rod penetrates through the low-pressure chamber 112, and a sealing ring is arranged on an outer peripheral wall of a penetrating part of the second rotating rod 112; the low-pressure chamber 112 is provided with a communication port 119 communicated 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 liquid flowing out from the high-pressure chamber through the pressure relief channel can flow into the low-pressure chamber, and the effect of effectively collecting pressure relief water flow is realized.

In this embodiment, the low-pressure chamber 112 is communicated with the external atmosphere through a pressure relief port provided with a pressure relief valve 122, so as to reduce the air pressure in the low-pressure chamber as much as possible and make the air pressure in the low-pressure chamber consistent with the external atmosphere; preferably, the relief port is located proximate to the communication port 119.

In this embodiment, the switch 100 is the switch structure of the first or second embodiment, and has the technical features of the switch of the first or second embodiment.

Example four

In this embodiment, a feeding device is provided with the switch in any of the above embodiments, and different openings of the switch are respectively connected to different water paths of the feeding device, so as to control the feeding of different additives to different water paths by selecting or combining the different additives, thereby improving the feeding diversity of the feeding device.

The above description is only for the preferred embodiment of the present invention, and not intended to limit the present invention in any way, and although the present invention has been disclosed by the preferred embodiment, it is not intended to limit the present invention, and those skilled in the art can make various changes and modifications to the equivalent embodiment without departing from the scope of the present invention.

Claims (10)

1. A switch, comprising: a shell, a cavity is formed in the shell, a plurality of openings communicated with the cavity are arranged on the shell,

the method is characterized in that:

the cavity is internally provided with a rotating rod which can rotate around a shaft, the rotating rod is provided with a plurality of cam parts which are arranged opposite to different openings, and each cam part respectively drives the pistons which are correspondingly arranged one by one to stretch and move relative to the openings and is used for controlling the sealing structures arranged on different pistons to correspondingly seal or open the corresponding openings.

2. The switcher of claim 1, wherein the cam portions provided on the rotating lever are arranged in a staggered arrangement along the axial direction of the rotating lever;

preferably, the radial projecting orientation of the different cam portions with respect to the axis of the rotary lever is the same, or differently arranged.

3. The switch of claim 2, wherein the housing has a plurality of openings spaced along a line, the axis of a rotating rod disposed in the chamber being parallel to the line, the rotating rod having cam portions disposed in one-to-one correspondence with some or all of the openings, the cam portions being disposed in the same cross-section as the corresponding openings.

4. The switching device as claimed in claim 3, wherein the different openings are respectively provided with a piston, each piston is respectively provided with a sealing structure for correspondingly sealing the corresponding opening, each piston is respectively provided with a through hole, the rotating rod sequentially passes through each through hole, and the portion of the rotating rod passing through each through hole is respectively provided with a cam portion for driving the corresponding piston to move.

5. The switch of claim 4 wherein the piston includes a protrusion projecting toward the center of the through-hole and abutting against the cam, the protrusion being located on a side of the through-hole wall remote from the opening;

preferably, a spring is arranged between the piston and the inner wall of the shell, and applies a pushing elastic force to the piston in a direction close to the opening to push a sealing ring arranged on the piston to correspondingly seal the opening.

6. A switch according to claim 2, wherein the housing is provided with a plurality of openings in different side walls, each opening being in a different cross-section of the housing.

7. The switch according to any one of claims 1 to 6, wherein two or more rotary rods are provided in the chamber of the housing, each rotary rod being provided with a cam portion for controlling the relative telescopic movement of different or the same pistons.

8. The switch according to any one of claims 1 to 7, wherein a plurality of chambers are provided in the housing, a rotating rod is provided in each of the chambers, at least one opening is provided in each of the chambers, and the rotating rod in each of the chambers pushes the corresponding piston to move in an extending manner through the cam portion to control the opening and closing of the corresponding opening.

9. The switcher of any one of claims 1 to 8, wherein the housing is provided with a driving motor, and an output end of the driving motor is connected with the rotating rod directly or through a transmission structure and is used for driving the rotating rod to rotate around the shaft;

preferably, the end of the rotating rod penetrates out of the shell, and the penetrating end is meshed and connected with the output end of the driving motor through a reduction gear set.

10. A throwing device is characterized in that: the switch of any one of claims 1 to 9 is installed, and different openings of the switch are respectively connected with different water paths of the dispensing device, so as to control the dispensing of different additives, alternatively or in combination, to different water paths.

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