CN114992360A

CN114992360A - Flow-adjustable water mixing valve core

Info

Publication number: CN114992360A
Application number: CN202110225373.9A
Authority: CN
Inventors: 马永华
Original assignee: Ningbo Wanhai Valve Technology Co ltd
Current assignee: Ningbo Wanhai Valve Technology Co ltd
Priority date: 2021-03-01
Filing date: 2021-03-01
Publication date: 2022-09-02
Anticipated expiration: 2041-03-01

Abstract

The invention relates to a flow-adjustable water mixing valve core, which comprises a valve shell and a valve plate assembly, wherein the valve shell is provided with a valve seat; the method is characterized in that: the valve plate assembly comprises a fixed valve plate, a movable valve plate and a piston, wherein the fixed valve plate is provided with a cold water through hole, a hot water through hole and a water outlet through hole; the movable valve plate is attached to the fixed valve plate and can rotate around the axis of the movable valve plate, the movable valve plate is provided with a water mixing concave cavity, the water mixing concave cavity is provided with a middle concave cavity and side concave cavities, the middle concave cavity is communicated with the side concave cavities through a valve port, the water outlet through hole is always communicated with the middle concave cavity, and the side concave cavities are communicated with the cold water through hole and/or the hot water through hole through the rotation of the movable valve plate; the movable valve plate is provided with a through hole, the piston penetrates through the through hole and can move up and down in the middle concave cavity, and the flow area of the valve port can be changed by the up-and-down movement of the piston, so that the flow rate can be adjusted. The water mixing valve core is a water mixing valve core with a brand new and more reasonable structure and adjustable flow, and the flow of the water mixing valve core can be adjusted through rotating or pressing.

Description

Flow-adjustable water mixing valve core

Technical Field

The invention relates to a water faucet valve core, in particular to a water faucet valve core with the functions of mixing water (controlling the opening and closing of a water inlet waterway and adjusting the water temperature) and adjusting the flow.

Background

The valve core of the water tap can be divided into two categories according to functions, one is a water mixing valve core and is used for controlling the opening and closing of a water inlet waterway of cold water and hot water and adjusting the water temperature, and the other water mixing valve cores can also adjust the water quantity. The other type is a water diversion valve core which can control the water flow direction and a water outlet channel for distributing the water flow, and the water diversion valve core is divided into two water ways (a shower head and a faucet) and three water ways (a shower head, a top shower and a faucet) due to different spraying systems.

The traditional valve core with flow regulation and water mixing functions realizes flow regulation in a swinging mode. This makes the faucet necessary to have a long and large handle for operation, which makes the faucet bulky and makes the valve plate structure and valve stem assembly complicated. For example, a valve core with flow regulation and water mixing functions is disclosed in the chinese utility model patent "a two-in two-out valve core" with patent number CN201921359678.3, which comprises a valve body, and a swing rod mechanism, a movable ceramic sheet and a fixed ceramic sheet sequentially arranged in the valve body from top to bottom; the swing rod mechanism is used for driving the movable ceramic chip to slide at the first position and the second position and driving the movable ceramic chip to rotate. The utility model discloses except can constitute the mixed water route of going out cold and hot water usually, still can constitute a single cold water route that only goes out cold water alone, configuration optimization reduces installation cost, and through the swing and the rotation of the pendulum rod of pendulum rod mechanism in addition, can realize the switching in single cold water route and mixed water route to and the play water temperature in the mixed water route of the play water flow in single cold water route of control and control.

Therefore, the existing valve core with the flow regulation and water mixing functions can be further improved.

Disclosure of Invention

The technical problem to be solved by the present invention is to provide a water mixing valve core with a novel and more reasonable structure and adjustable flow rate, and the flow rate of the water mixing valve core can be adjusted by rotating or pressing.

The technical scheme adopted by the invention for solving the technical problems is as follows: a flow-adjustable water mixing valve core comprises a valve shell and a valve plate component arranged in the valve shell; the method is characterized in that: the valve plate assembly comprises a fixed valve plate, a movable valve plate and a piston, and the fixed valve plate is provided with a cold water through hole, a hot water through hole and a water outlet through hole; the movable valve plate is attached to the fixed valve plate and can rotate around the axis of the movable valve plate, the movable valve plate is provided with a water mixing concave cavity, the water mixing concave cavity is provided with a middle concave cavity and side concave cavities, the middle concave cavity is communicated with the side concave cavities through a valve port, the water outlet through hole is always communicated with the middle concave cavity, and the side concave cavities are communicated with the cold water through hole and/or the hot water through hole through the rotation of the movable valve plate; the movable valve disc is provided with a through hole, the piston penetrates through the through hole and can move up and down in the middle cavity, and the flow area of the valve port can be changed by the up-and-down movement of the piston, so that the flow rate can be adjusted. The valve port is a through port at the intersection of the middle concave cavity and the side concave cavity and is used for communicating the middle concave cavity with the side concave cavity.

As one of the driving methods, the piston is preferably driven by a flow control valve rod rotatable about its axis so as to be movable up and down. This mode is through rotatory realization accent flow, compares in traditional swing mode realization flow control, and tap need not to set up longer handle that enlarges and operates, only need install additional the volume littleer knob can, can reduce tap volume, and enable tap appearance more succinct pleasing to the eye.

Preferably, the flow regulating valve rod is connected with the piston through a thread transmission structure, so that the rotary motion of the flow regulating valve rod is converted into the vertical motion of the piston; the thread transmission structure comprises an internal thread and an external thread, the internal thread is arranged on one of the flow regulating valve rod and the piston, and the external thread is arranged on the other of the flow regulating valve rod and the piston. This structure can convert the rotation of accent flow valve rod into the straight line up-and-down motion of piston according to the screw thread transmission principle, adopts the screw thread transmission structure can realize the infinitely variable control that the piston reciprocated moreover, and the flow control scope is more wide and accurate, and this structure need guarantee that the piston can not be rotatory to the valve casing relatively, can realize only changeing through muscle groove fit mode, perhaps realizes only changeing polygon cross-section and polygon hole complex mode.

The valve is further improved, the movable valve plate is driven by a temperature adjusting valve rod arranged on the valve casing in a penetrating mode and can rotate around the axis of the movable valve plate, the temperature adjusting valve rod is movably sleeved outside the flow adjusting valve rod, and the piston is located in an inner hole of the temperature adjusting valve rod. The temperature and the flow are adjusted by rotation, and the operation is convenient. The movable suit of temperature regulating valve rod is outside the flow regulating valve rod, and the flow operation is transferred to the inner circle knob promptly, and the operation of adjusting the temperature is carried out to the outer lane knob, and outer lane knob area is big, and the user contacts more easily, and it is big to be convenient for mix water operation and moment of torsion, operates more laborsavingly, avoids the maloperation, and is known well, and the frequency of adjusting the temperature is more big than adjusting the flow frequency, and laborsaving convenience of adjusting the temperature is more important for this reason, makes the operation more humanized for this design.

As another preferred driving method, the piston is driven by a flow adjustment button that is movable up and down along an axis. The flow is adjusted by pressing the key, so that the operation is easier and more convenient.

In order to realize that the downward movement of the flow regulating button can drive the piston to move downward and be positioned, the movable valve plate is driven by a temperature regulating valve rod arranged on the valve shell in a penetrating way and can rotate around the axis of the movable valve plate, the temperature regulating valve rod is movably sleeved outside the flow regulating button, the flow regulating button drives the piston to move up and down through a ball pen type spinning positioning structure, and the piston is supported by a spring to keep the upward movement trend. The ball pen type spinning positioning structure is a common mode capable of realizing downward moving and positioning.

The ball pen type spinning positioning structure comprises a rotary pressure head abutted against the top of a piston, wherein a flow regulating button is axially constrained in an inner hole of a temperature regulating valve rod and only can move up and down, the inner hole of the temperature regulating valve rod is provided with a plurality of deep groove parts and shallow groove parts which are circumferentially arranged at intervals and axially extend, the deep groove parts and the shallow groove parts are alternately arranged, the inner surface of the shallow groove part is also provided with a guide groove part which axially extends, the peripheral wall of the spinning head is provided with a plurality of radially outwards-protruding positioning blocks, the peripheral wall of the flow regulating button is provided with a plurality of radially outwards-protruding pushing blocks, the positioning blocks can move in the deep groove parts and the shallow groove parts, each deep groove part and each guide groove part are respectively internally provided with one pushing block, and the top surface of each positioning block and the bottom surface of each pushing block are in inclined plane fit; after the pushing block moves downwards to drive the positioning block to be separated from the deep groove part, the pushing block moves downwards continuously to drive the rotary pressure head to deflect and enable the positioning block to enter the shallow groove part; after the pushing block moves downwards to drive the positioning block to be separated from the shallow groove part, the rotating pressure head can be driven to deflect by the continuous downward movement of the pushing block, and the positioning block can enter the deep groove part.

In a further improvement, each group of the shallow groove parts is two stages, namely a first-stage shallow groove part and a second-stage shallow groove part, the bottom surface of the second-stage shallow groove part is lower than that of the first-stage shallow groove part, and the second-stage shallow groove part is positioned at the rear stage of the first-stage shallow groove part in the rotation direction of the rotary pressure head. The shallow groove part is divided into two stages to realize multi-stage water flow adjustment, namely when the positioning block is positioned in the deep groove part, the piston is positioned at the uppermost end, and the maximum water flow is realized; when the positioning block is positioned at the bottom surface of the first-stage shallow groove part, the piston is positioned at the middle position, and the middle water flow is formed; when the positioning block is positioned at the bottom surface of the second-stage shallow groove part, the piston is positioned at the lowest end position, and the water flow is small.

In order to make the rotary pressure head rotate more smoothly relative to the piston, the bottom surface of the rotary pressure head is provided with a containing groove, and a steel ball which is in rolling contact with the top surface of the piston is arranged in the containing groove. The friction force between the rotary pressure head and the piston is reduced by the arrangement of the steel balls.

Preferably, the middle part of the piston is positioned in the inner hole of the temperature regulating valve rod, the cross section of the middle part of the piston is polygonal, and the cross section of the inner hole of the temperature regulating valve rod is also polygonal. Of course, the limiting mode can also be realized through a rib groove limiting mode.

For the convenience of assembly, the valve shell comprises a valve seat and a shell fixed on the upper part of the valve seat, the fixed valve plate is fixed on the valve seat, and the valve seat is provided with a cold water inlet channel communicated with the cold water through hole, a hot water inlet channel communicated with the hot water through hole and a water outlet channel communicated with the water outlet through hole. Simultaneously, all the channels are arranged on the valve seat, so that the whole structure is more compact, and the water pipe is conveniently connected from the bottom.

Compared with the prior art, the invention has the advantages that: the water mixing valve core changes the flow area of a valve port through the up-and-down movement of the piston so as to adjust the flow, is completely different from the traditional method for adjusting the flow through the sliding and the swinging of a valve plate, is a brand new structure, is possible to adjust the flow through the rotating or pressing mode, and adjusts the flow through the rotating or pressing mode, and a knob or a key does not need to be made very sharp, so that the appearance and the volume of a water faucet using the valve core can be simplified; because the movable valve plate only needs to rotate in the circumferential direction, on the basis of the same area of the movable valve plate, the cold water through hole, the hot water through hole and the water outlet through hole can be relatively large, the maximum water yield of the faucet is increased, and the assembly structure between each valve rod and the valve plate is simpler.

Drawings

FIG. 1 is a first perspective view of a first embodiment of the present invention;

FIG. 2 is a schematic perspective view of a second embodiment of the present invention;

FIG. 3 is a cross-sectional view (initial position) of the first embodiment of the present invention;

FIG. 4 is a cross-sectional view of the first embodiment of the present invention (tempered to a fully chilled water position);

FIG. 5 is a cross-sectional view of a first embodiment of the invention (tempered to mixed water position);

FIG. 6 is a cross-sectional view of the first embodiment of the present invention (tempered to full hot water position);

FIG. 7 is a cross-sectional view of the first embodiment of the present invention (water flow reducing position);

FIG. 8 is an exploded perspective view of the first embodiment of the present invention;

FIG. 9 is a schematic perspective view of the movable valve plate according to the first embodiment of the present invention;

FIG. 10 is a schematic perspective view of a thermostatic valve stem according to a first embodiment of the present invention;

FIG. 11 is a schematic perspective view of a flow regulating valve stem according to a first embodiment of the present invention;

FIG. 12 is a first perspective view of a second embodiment of the present invention;

FIG. 13 is a second perspective view of a second embodiment of the present invention;

FIG. 14 is a cross-sectional view (initial position) of a second embodiment of the present invention;

FIG. 15 is a cross-sectional view of a second embodiment of the present invention (water flow turndown position);

FIG. 16 is an exploded perspective view of a second embodiment of the present invention;

FIG. 17 is a schematic perspective view of a thermostatic valve stem according to a second embodiment of the present invention;

fig. 18 is a schematic perspective view of a housing according to a second embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in FIGS. 1 to 11, a first preferred embodiment of the present invention is shown.

A flow-adjustable water mixing valve core comprises a valve shell 1 and a valve plate component arranged in the valve shell 1; the valve housing 1 includes a valve seat 11 and a housing 12 fixed to an upper portion of the valve seat 11.

The valve plate assembly comprises a fixed valve plate 2, a movable valve plate 3 and a piston 5, wherein the fixed valve plate 2 is provided with a cold water through hole 21, a hot water through hole 22 and a water outlet through hole 23; the fixed valve plate 2 is fixed on the valve seat 11, and the valve seat 11 is provided with a cold water inlet channel 4b communicated with the cold water through hole 21, a hot water inlet channel 4a communicated with the hot water through hole 22 and a water outlet channel 4c communicated with the water outlet through hole 23. The movable valve plate 3 is attached to the fixed valve plate 2 and can rotate around the axis of the movable valve plate, the movable valve plate 3 is driven by the temperature adjusting valve rod 7 penetrating through the valve casing 1 and can rotate around the axis of the movable valve plate, the temperature adjusting valve rod 7 is provided with a first protruding stop block 73, and the casing 12 is internally provided with a second stop block 121 which forms a stop matching with the first stop block 32.

The movable valve plate 3 has a water mixing cavity 31, the water mixing cavity 31 has a middle cavity 311 and side cavities 312, the middle cavity 311 is substantially circular, the side cavities 312 are substantially fan-shaped, the middle cavity 311 and the side cavities 312 are communicated through a valve port 313, and the valve port 313 refers to a through hole at the intersection of the middle cavity 311 and the side cavities 312 and is used for communicating the middle cavity 311 and the side cavities 312. The water outlet through hole 23 is always communicated with the middle concave cavity 311, and the rotation of the movable valve plate 3 can enable the side concave cavity 312 to be communicated with the cold water through hole 21 and/or the hot water through hole 22; the movable valve plate 3 is provided with a through hole 32, the lower part of the piston 5 penetrates through the through hole 32 of the movable valve plate 3 and can move up and down in the middle concave cavity 311, and the flow area of the valve port 313 can be changed by the up-and-down movement of the piston 5 so as to adjust the flow.

The lower portion of the piston 5 in this embodiment has a substantially cylindrical shape, but may have a rectangular parallelepiped shape or a sheet shape as long as the valve port 313 is partially blocked during the downward movement of the piston 5.

The piston 5 in this embodiment is driven by a flow regulating valve rod 6 rotatable about its axis to move up and down. The temperature regulating valve rod 7 is movably sleeved outside the flow regulating valve rod 6, namely, the flow regulating valve rod 6 is axially restricted in the temperature regulating valve rod 7, and the flow regulating valve rod 6 can only rotate but cannot axially move. The flow regulating valve rod 6 is connected with the piston 5 through a thread transmission structure, so that the rotary motion of the flow regulating valve rod 6 is converted into the up-and-down motion of the piston 5; the thread transmission structure comprises an internal thread 61 and an external thread 51, wherein the internal thread 61 is arranged on the flow regulating valve rod 6, namely, a threaded hole is formed in the lower part of the flow regulating valve rod 6, the external thread 51 is arranged on the upper part of the piston 5, namely, the upper part of the piston 5 forms an upward convex thread column, the middle part of the piston 5 is positioned in an inner hole of the temperature regulating valve rod 7, the cross section of the middle part of the piston 5 is polygonal or other non-circular shapes (including a trilateral shape, a quadrilateral shape and the like), and the cross section of the inner hole 74 of the temperature regulating valve rod 7 is also polygonal, so that the piston 3 can only move up and down relative to the temperature regulating valve rod 7 and cannot rotate, and the lower part of the piston is in a round tubular shape.

The working principle and the process of the water mixing and dividing integrated water faucet valve core are as follows:

before the operation, the movable valve plate 3 is located at the initial position, as shown in fig. 3, the movable valve plate 3 simultaneously shields the cold water through hole 21 and the hot water through hole 22, the hot water inlet channel 4a and the cold water inlet channel 4b are blocked and cannot enter the water mixing cavity 31, no water flows out of the water outlet channel 4c, the first stop 32 abuts against one side of the second stop 121, and it is ensured that the movable valve plate 3 can only rotate towards one direction.

Temperature adjustment process: the temperature adjusting valve rod 7 is rotated to drive the movable valve plate 3 to rotate, the side concave cavity 312 on the movable valve plate 3 is firstly communicated with the cold water through hole 21, and cold water flows out through the water outlet channel 4c after passing through the cold water through hole 21, the side concave cavity 312, the valve port 313, the middle concave cavity 311 and the water outlet through hole 23, as shown in fig. 4. The temperature adjusting valve rod 7 is continuously rotated to drive the movable valve plate 3 to continuously rotate, the side concave cavity 312 on the movable valve plate 3 is simultaneously communicated with the cold water through hole 21 and the hot water through hole 22, cold water enters the side concave cavity 312 through the cold water through hole 21, hot water enters the side concave cavity 312 through the hot water through hole 22, the cold water and the hot water are mixed in the side concave cavity 312, then flow out through the valve port 313, the middle concave cavity 311 and the water outlet through hole 23 and finally flow out through the water outlet channel 4c, and temperature adjustment is achieved according to different communication area ratios of the cold water through hole 21 and the hot water through hole 22 to the side concave cavity 312, as shown in fig. 5. The temperature adjusting valve rod 7 is further rotated to drive the movable valve plate 3 to continue to rotate, the side cavity 312 on the movable valve plate 3 is only communicated with the hot water through hole 22, and hot water flows out through the water outlet channel 4c after passing through the hot water through hole 22, the side cavity 312, the valve port 313, the middle cavity 311 and the water outlet through hole 23, and is the hottest water at this time, as shown in fig. 6. Meanwhile, the first stopper 32 abuts against the other side of the second stopper 121, so that the movable valve plate 3 can only rotate in the opposite direction.

And (3) flow rate adjusting process: as shown in fig. 7, when the flow regulating valve rod 6 is rotated, the internal thread 61 rotates relative to the external thread 51, but the piston 5 cannot rotate in the circumferential direction, and according to the principle of screw transmission, the piston 5 can only move downwards, the piston 5 gradually moves downwards, the larger the degree of shielding the valve port 313 is, the flow area of the valve port 313 is reduced, so that the water flow passing through the valve port 313 is reduced, and finally the water amount flowing out from the water outlet channel 4c is reduced. When the flow regulating valve rod 6 is rotated reversely, the internal thread 61 rotates reversely relative to the external thread 51, but the piston 5 cannot rotate circumferentially, according to the thread transmission principle, the piston 5 can only move upwards, the piston 5 gradually moves upwards, the smaller the degree of shielding the valve port 313, the larger the flow area of the valve port 313, the larger the water flow passing through the valve port 313, and finally the larger the water flow from the water outlet channel 4 c.

Fig. 12 to 18 show a second preferred embodiment of the present invention.

The present embodiment is different from the first embodiment in that: the piston 5 is driven by a flow adjusting button 8 which can move up and down along the axis. The movable valve plate 3 is driven by a temperature adjusting valve rod 7 arranged on the valve shell 1 in a penetrating mode and can rotate around the axis of the movable valve plate, the temperature adjusting valve rod 7 is movably sleeved outside the flow adjusting key 8, the flow adjusting key 8 drives the piston 5 to move up and down through the ball pen type spinning positioning structure, and the piston 5 is supported by the spring 52 to keep the upward moving trend.

The ball pen type spinning positioning structure in the embodiment comprises a rotary pressure head 9 abutting against the top of the piston 5, a containing groove 92 is formed in the bottom surface of the rotary pressure head 9, and a steel ball 10 in rolling contact with the top surface of the piston 5 is arranged in the containing groove 92. The flow regulating button 8 is axially constrained in an inner hole of the temperature regulating valve rod 7 and can only move up and down, the inner hole of the temperature regulating valve rod 7 is provided with a plurality of deep groove parts 71 and shallow groove parts 72 which are circumferentially arranged at intervals and axially extend, the number of the deep groove parts 71 is three in the embodiment, the number of the shallow groove parts 72 is three, the deep groove parts 71 and each group of the shallow groove parts 72 are alternately arranged, and the inner surface of each group of the shallow groove parts 72 is also provided with a guide groove part 73 axially extending.

The peripheral wall of the spinning head 9 is provided with three radially outward-protruding positioning blocks 91, in an initial state, the three positioning blocks 91 are all located in the deep groove part 71, the peripheral wall of the flow regulating button 8 is provided with nine radially outward-protruding pushing blocks 81, the positioning blocks 91 can move in the deep groove part 71 and the shallow groove part 72, each deep groove part 71 and each guiding groove part 73 are respectively provided with one pushing block 81, the top surfaces of the positioning blocks 91 and the bottom surfaces of the pushing blocks 81 are in inclined surface fit, and the inclined directions of the top surfaces of the positioning blocks 91 and the bottom surfaces of the pushing blocks 81 are consistent; after the pushing block 81 moves downwards to drive the positioning block 91 to be separated from the deep groove part 71, the rotating press head 9 can be deflected by the continuous downward movement of the pushing block 81, and the positioning block 91 enters the shallow groove part 72; after the pushing block 81 moves downward to separate the positioning block 91 from the shallow groove portion 72, the continued downward movement of the pushing block 81 causes the rotary ram 9 to deflect and the positioning block 91 to enter the deep groove portion 71.

Each set of the shallow groove portions 72 is divided into two stages, i.e., a first-stage shallow groove portion 721 and a second-stage shallow groove portion 722, the bottom surface of the second-stage shallow groove portion 722 is lower than the bottom surface of the first-stage shallow groove portion 721, and the second-stage shallow groove portion 722 is located at the subsequent stage of the first-stage shallow groove portion 721 in the rotation direction of the rotary ram 9.

The working principle and the process of the present embodiment are different from those of the first embodiment in that the flow rate adjusting process is different.

The flow rate adjusting process in this embodiment is as follows: the three positioning blocks 91 of the screw press head 9 at the initial position are simultaneously deep into the groove 71, the piston 5, the screw press head 9 and the flow adjusting button 8 are all at the upmost position under the action of the spring 52, the flow area of the valve port 313 is the largest, and finally the water quantity flowing out from the water outlet channel 4c is the largest.

When the flow adjusting button 8 is pressed for the first time, the pushing block 81 located in the deep groove portion 71 pushes the positioning block 91 to move downwards, and because the top surface of the positioning block 91 is in inclined surface fit with the bottom surface of the pushing block 81, after the pushing block 81 moves downwards to drive the positioning block 91 to be separated from the deep groove portion 71, the pushing block 81 continues to move downwards to drive the rotary pressure head 9 to deflect and enable the positioning block 91 to enter the first-stage shallow groove portion 721, at this time, the positioning block 91 abuts against the bottom surface of the first-stage shallow groove portion 721, the positioning block 9 drives the piston 5 to move downwards and position at the position, the piston 5 moves downwards to increase the shielding degree of the valve port 313, the flow area of the valve port 313 is reduced, so that the water flow passing through the valve port 313 is reduced for the first time, and finally the water flow from the water outlet channel 4c is reduced.

When the flow adjusting button 8 is pressed for the second time, the pushing block 81 located in the guiding groove 73 pushes the positioning block 91 to move downwards, because the top surface of the positioning block 91 is in inclined surface fit with the bottom surface of the pushing block 81, after the pushing block 81 moves downwards to drive the positioning block 91 to separate from the first-stage shallow groove portion 721, the pushing block 81 continues to move downwards to drive the rotary pressure head 9 to deflect and enable the positioning block 91 to enter the second-stage shallow groove portion 722, at this time, the positioning block 91 abuts against the bottom surface of the second-stage shallow groove portion 722, because the bottom surface of the second-stage shallow groove portion 722 is lower than the bottom surface of the first-stage shallow groove portion 721, the piston 5 is positioned at a position moving downwards, the degree of shielding the valve port 313 is further increased, the flow area of the valve port 313 is further reduced, the water flow passing through the valve port 313 is further reduced, and finally the water amount flowing out from the water outlet channel 4c is further reduced.

When the flow adjusting button 8 is pressed for the third time, the pushing block 81 located in the guiding groove 73 pushes the positioning block 91 to move downwards, and because the top surface of the positioning block 91 is in inclined surface fit with the bottom surface of the pushing block 81, after the pushing block 81 moves downwards to drive the positioning block 91 to separate from the second-stage shallow groove portion 722, the pushing block 81 continues to move downwards to drive the rotary pressure head 9 to deflect and enable the positioning block 91 to enter the deep groove portion 71, the flow area of the valve port 313 is the largest, and the water amount flowing out from the water outlet channel 4c becomes the largest again.

It should be noted that in the description of the present embodiment, the terms "front, back", "left, right", "upper, lower", "clockwise", "counterclockwise", etc. indicate the orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Claims

1. A flow-adjustable water mixing valve core comprises a valve shell (1) and a valve plate component arranged in the valve shell (1); the method is characterized in that: the valve plate assembly comprises a fixed valve plate (2), a movable valve plate (3) and a piston (5), wherein the fixed valve plate (2) is provided with a cold water through hole (21), a hot water through hole (22) and a water outlet through hole (23); the movable valve plate (3) is attached to the fixed valve plate (2) and can rotate around the axis of the movable valve plate, the movable valve plate (3) is provided with a water mixing concave cavity (31), the water mixing concave cavity (31) is provided with a middle concave cavity (311) and side concave cavities (312), the middle concave cavity (311) is communicated with the side concave cavities (312) through a valve port (313), the water outlet through hole (23) is always communicated with the middle concave cavity (311), and the rotation of the movable valve plate (3) enables the side concave cavities (312) to be communicated with the cold water through hole (21) and/or the hot water through hole (22); the movable valve plate (3) is provided with a through hole (32), the piston (5) penetrates through the through hole (32) and can move up and down in the middle cavity (311), and the flow area of the valve port (313) can be changed by the up-and-down movement of the piston (5) so as to adjust the flow.

2. The adjustable flow mixing valve cartridge of claim 1, wherein: the piston (5) is driven by a flow regulating valve rod (6) which can rotate around the axis of the piston and can move up and down.

3. The adjustable flow mixing valve cartridge of claim 2, wherein: the flow regulating valve rod (6) is connected with the piston (5) through a thread transmission structure, so that the rotary motion of the flow regulating valve rod (6) is converted into the up-and-down movement of the piston (5); the thread transmission structure comprises an internal thread (61) and an external thread (51), the internal thread (61) is arranged on one of the flow regulating valve rod (6) and the piston (5), and the external thread (51) is arranged on the other of the flow regulating valve rod (6) and the piston (5).

4. The adjustable flow mixing valve cartridge of claim 2, wherein: the movable valve plate (3) is driven by a temperature adjusting valve rod (7) arranged on the valve casing (1) in a penetrating mode and can rotate around the axis of the movable valve plate, and the temperature adjusting valve rod (7) is movably sleeved outside the flow adjusting valve rod (6).

5. The adjustable flow mixing valve cartridge according to claim 1, wherein: the piston (5) is driven by a flow adjusting key (8) which can move up and down along the axis and can move up and down.

6. The adjustable flow mixing valve cartridge of claim 5, wherein: the movable valve plate (51) is driven by a temperature adjusting valve rod (7) arranged on the valve casing (1) in a penetrating mode and can rotate around the axis of the movable valve plate, and the temperature adjusting valve rod (7) is movably sleeved outside the flow adjusting key (8).

7. The mixing valve element of claim 6, wherein: the flow regulating key (8) is driven by a ball pen type spinning positioning structure to move up and down the piston (5), the piston (5) is supported by a spring (52) to keep an upward movement trend the ball pen type spinning positioning structure comprises a rotary pressure head (9) which is abutted against the top of the piston (5), the flow regulating key (8) is axially constrained in an inner hole of a temperature regulating valve rod (7) and only can move up and down, the inner hole of the temperature regulating valve rod (7) is provided with a plurality of deep groove parts (71) and shallow groove parts (72) which are arranged at intervals along the circumference and axially extend, the deep groove parts (71) and the shallow groove parts (72) are alternately arranged, the inner surface of the shallow groove part (72) is also provided with a guide groove part (73) which axially extends, the peripheral wall of the spinning head (9) is provided with a plurality of radially outward-convex positioning blocks (91), the peripheral wall of the flow regulating key (8) is provided with a plurality of radially outward-convex pushing blocks (81), the positioning block (91) can move in the deep groove part (71) and the shallow groove part (72), each deep groove part (71) and each guide groove part (73) are respectively provided with one pushing block (81), and the top surface of the positioning block (91) is in inclined surface fit with the bottom surface of each pushing block (81); after the pushing block (81) moves downwards to drive the positioning block (91) to be separated from the deep groove part (71), the pushing block (81) continuously moves downwards to drive the rotary pressure head (9) to deflect and enable the positioning block (91) to enter the shallow groove part (72); after the pushing block (81) moves downwards to drive the positioning block (91) to be separated from the shallow groove part (72), the pushing block (81) continues to move downwards to drive the rotary pressure head (9) to deflect and enable the positioning block (91) to enter the deep groove part (71).

8. The adjustable flow mixing valve cartridge of claim 7, wherein: each group of the shallow groove parts (72) is divided into two stages, namely a first-stage shallow groove part (721) and a second-stage shallow groove part (722), the bottom surface of the second-stage shallow groove part (722) is lower than that of the first-stage shallow groove part (721), and the second-stage shallow groove part (722) is positioned at the rear stage of the first-stage shallow groove part (721) in the rotating direction of the rotary pressure head (9).

9. The adjustable flow mixing valve cartridge according to claim 7, wherein: the bottom surface of the rotary pressure head (9) is provided with a containing groove (92), and a steel ball (10) which is in rolling contact with the top surface of the piston (5) is arranged in the containing groove (92).

10. The adjustable flow mixing valve cartridge of claim 4, wherein: the middle part of the piston (5) is positioned in an inner hole (74) of the temperature adjusting valve rod (7), the cross section of the middle part of the piston (5) is polygonal, and the cross section of the inner hole (74) of the temperature adjusting valve rod (7) is also polygonal.