CN117450291A

CN117450291A - Fluid distribution valve and fluid supply system with same

Info

Publication number: CN117450291A
Application number: CN202210852091.6A
Authority: CN
Inventors: 张建明
Original assignee: Hanyu Group JSCL
Current assignee: Hanyu Group JSCL
Priority date: 2022-07-19
Filing date: 2022-07-19
Publication date: 2024-01-26

Abstract

The present invention provides a fluid dispensing valve comprising: the first opening and closing component is arranged in the fluid inlet cavity, and can be displaced along the axial direction to selectively open and close the communication between the inflow pipe and the fluid inlet cavity and close the communication between the fluid inlet cavity and the first fluid outlet cavity; the second opening and closing assembly is arranged in the second fluid outflow cavity, and can be displaced along the axial direction to selectively open and close the communication between the fluid inlet cavity and the second fluid outflow cavity. The present invention also provides a fluid supply system comprising: pump means for discharging said fluid; the above-mentioned fluid dispensing valve is connected to the pump means. The fluid distribution valve is not in mixed flow state of different outflow loops when in use, and is particularly suitable for application scenes requiring more than two distribution loops. The fluid supply system of the present invention realizes a control function of supplying fluid to a plurality of fluid distribution circuits by controlling the rotation speed of the motor of the pump device, and avoids electric drive control of the valve rod.

Description

Fluid distribution valve and fluid supply system with same

Technical Field

The present invention relates to a fluid distribution valve controlled by a fluid supply source pressure and a fluid supply system including the same, and IPC is classified as F16K 11/044.

Background

Typically, fluid delivery systems require that the fluid be dispensed as required for different application scenarios. As the washing machine requires a drain pipe to drain the washing water from the tub containing the water to the outside or circulates the washing water back to the tub through the circulation water pipe, in order to send the washing water drained from the tub to the drain pipe or the circulation water pipe, it is necessary to provide two pumps connected to the respective pipes, which results in costs corresponding to the two pumps. In addition, a single pump may be used to rotate in a clockwise direction or in an opposite direction so that the fluid is respectively communicated with the circulating water pipe and the drain pipe in both directions, in which case cost reduction is advantageous, but there is a problem in that backflow may occur due to malfunction of the pump motor.

Chinese patent CN110359240B discloses a washing machine which employs a valve assembly that can circulate the washing water discharged from the pump back into the tub or discharge the washing water to the outside of the machine by means of a difference in pressure of a fluid supply source. The circulation flow path of the scheme is in a normally open state, and a mixed flow state in which the discharge flow path and the circulation flow path are simultaneously conducted for a long time exists, so that bad use effects can be caused, and the scheme is particularly unsuitable for application scenes in which more than two fluid loops are needed.

For other terms and common knowledge, see "mechanical engineering handbook" and "motor engineering handbook" (written group, 1997 edition 2 of mechanical industry Press), national standard GB/T21465 "valve term".

Disclosure of Invention

In order to solve the problems described in the background art, the present invention provides a fluid distribution valve for selectively distributing a fluid supplied from a fluid supply source to a plurality of pipes, including a valve body having an inflow pipe and a first outflow pipe communicating with the fluid supply source, a valve seat dividing a space enclosed by the valve seat and the valve body into a fluid inlet chamber communicating with the inflow pipe, a first fluid outlet chamber communicating with the first outflow pipe, and a second fluid outlet chamber communicating with the second outflow pipe, wherein a third diversion hole is provided at a front end of the valve seat to communicate the fluid inlet chamber with the first fluid outlet chamber, and a fourth diversion hole is provided at a center of a rear end of the valve seat to communicate the fluid inlet chamber with the second fluid outlet chamber, further comprising:

the first opening and closing component is arranged in the fluid inlet cavity, the first elastic piece is arranged at the rear side of the first opening and closing component to apply an initial opening and closing force F1 to the first opening and closing component, so that the first opening and closing component closes the communication between the inflow pipe and the fluid inlet cavity in a reset state, and according to the fluid pressure supplied by the fluid supply source to the inflow pipe, the first opening and closing component can displace along the axial direction to open the communication between the inflow pipe and the fluid inlet cavity, or simultaneously closes the third diversion hole;

the second opening and closing assembly is arranged in the second fluid outflow cavity, the second opening and closing assembly is provided with a second elastic piece at the rear side to apply an initial opening and closing force F2 to the second opening and closing assembly, so that the second opening and closing assembly closes the fourth diversion hole in a reset state, and the second opening and closing assembly can displace along the axial direction to open the fourth diversion hole according to the fluid pressure supplied by the fluid supply source to the inflow pipe;

the first opening and closing component and the second opening and closing component are opened and closed along the same direction under the driving force provided by the same fluid supply source, and F2 is larger than F1.

When the fluid distribution valve is reset, the flow to the first outflow pipe and the second outflow pipe is closed, and the fluid distribution valve is in a first closed state; when the flow to the first outflow pipe is conducted, the flow to the second outflow pipe is closed, and the flow to the first outflow pipe is in a first flowing state of the fluid distribution valve; when the flow to the second outflow pipe is conducted, the flow to the first outflow pipe is closed, and the flow to the first outflow pipe is in a second flowing state of the fluid distribution valve; when the flow conduction to the first outflow pipe is switched to the flow conduction to the second outflow pipe, there is a process in which the flow to both the first outflow pipe and the second outflow pipe is closed, which is the second closed state of the fluid distribution valve. Because the first opening and closing component and the second opening and closing component are opened and closed along the same direction under the driving force provided by the same fluid supply source, and the initial opening and closing force F2 of the former is larger than the initial opening and closing force F1 of the latter, the fluid distribution valve presents the following process under the action of the same driving force:

when the valve is opened, the driving is applied, the opening and closing force of the first elastic piece is overcome firstly to enable the first opening and closing component to act, the fluid distribution valve is sequentially converted from a first closed state to a first flowing state and a second closed state, the opening and closing force of the second elastic piece is overcome secondly to enable the second opening and closing component to act, and the fluid distribution valve is converted to a second flowing state;

when the valve is closed, the driving is canceled, the opening and closing force of the second elastic piece is firstly recovered to enable the second opening and closing component to reset due to the fact that the opening and closing force of the second elastic piece is larger, the fluid distribution valve is sequentially converted into a second closing state and a first flowing state from the second flowing state, the opening and closing force of the first elastic piece is then recovered to enable the first opening and closing component to reset due to the fact that the opening and closing force of the first elastic piece is smaller, and the fluid distribution valve is converted into the first closing state.

It can be seen that the fluid distribution valve undergoes a second closed condition, i.e., a process in which flow to both the first and second outflow tubes is closed, regardless of whether it transitions from the first to the second or the first flow state. Therefore, the fluid distribution valve has no mixed flow phenomenon that different flow out pipes flow simultaneously when in use, and is convenient for controlling the opening and closing of each fluid distribution valve independently, thus being particularly suitable for application scenes in which more than two fluid distribution loops are needed.

Further, the second opening and closing assembly comprises a second valve membrane and a cylindrical valve rod fixedly connected with the second valve membrane and used for supporting, and the second elastic piece is a spring which is sleeved on the valve rod and pushes the second valve membrane to close the fourth diversion hole close to the rear end of the valve seat.

Further, the first opening and closing component comprises a first valve membrane and a valve plate fixedly connected with the first valve membrane for supporting; the valve plate is provided with a disc-shaped supporting part, and the supporting part is provided with a second diversion hole penetrating through the front end and the rear end of the supporting part; the first valve membrane comprises an annular peripheral part arranged at the outer edge of the rear side and a circular disc part arranged at the center of the front side; the support part is positioned between the peripheral part and the circular plate part, the circular plate part is used for opening and closing the conduction of the inflow pipe, and the peripheral part is used for opening and closing the conduction of the third diversion hole.

Further, the first valve film has a flexible thin-walled flexible portion connecting the outer peripheral portion and the disk portion, and the flexible portion is provided with a first deflector hole at a position corresponding to the second deflector hole.

Preferably, a guide rod is fixedly arranged in the center of the rear side of the valve plate, a blind hole is formed in the center of the valve rod, and the rear section of the guide rod is slidably sleeved in the blind hole. The design plays a guiding role on the axial movement of the first opening and closing component, and is beneficial to the stable and reliable movement of the first opening and closing component.

In addition, the present invention also provides a fluid supply system that selectively supplies fluid to a plurality of fluid supply paths, comprising: pump means for discharging said fluid; the fluid distribution valve connected with the pump device; and a control device for controlling the fluid discharge pressure of the pump device.

Preferably, the pump device has a single discharge port having a fluid discharge pressure different in magnitude according to a rotation speed of the impeller, and the discharge port communicates with the inflow pipe of the fluid distribution valve.

Preferably, the pump device has two discharge ports, i.e., a first discharge port and a second discharge port, the first discharge port being in communication with the inflow pipe of one fluid distribution valve, the second discharge port being in communication with the inflow pipe of the other fluid distribution valve, the two discharge ports discharging the fluid at respective discharge pressures, and the magnitude relation of the discharge pressures being different depending on the rotation direction and the rotation speed of the impeller. .

The fluid supply system of the present invention controls the motor rotation speed of the pump device by the control device, adjusts the fluid pressure of the inflow pipe led into the fluid distribution valve, realizes the control function of supplying fluid to a plurality of fluid supply paths, and avoids the electric driving control of the valve rod.

In addition, the invention also provides a washing device, which is provided with the fluid supply system.

In addition, the invention also provides an automobile provided with the fluid supply system.

Drawings

Fig. 1 is a schematic structural view of a fluid dispensing valve of embodiment 1 of the present invention.

Fig. 2 is a cross-sectional view of the fluid dispensing valve of embodiment 1 of the present invention in a first closed (reset) state.

Fig. 3 is a partial enlarged view I of fig. 2.

Fig. 4 is a schematic structural view of a valve cover of a fluid dispensing valve of embodiment 1 of the present invention.

Fig. 5 is a schematic structural view of a valve seat of a fluid dispensing valve of embodiment 1 of the present invention.

Fig. 6 is a schematic structural view of a valve body of a fluid dispensing valve of embodiment 1 of the present invention.

Fig. 7 is a schematic view showing the structure of a first valve membrane of the fluid dispensing valve of embodiment 1 of the present invention.

Fig. 8 is a sectional view of the fluid dispensing valve of embodiment 1 of the present invention in a first flow-through state.

Fig. 9 is a sectional view of the second closed state of the fluid dispensing valve of embodiment 1 of the present invention.

Fig. 10 is a sectional view of the second flow-through state of the fluid dispensing valve of embodiment 1 of the present invention.

Fig. 11 is a sectional view of a fluid supply system combining the fluid dispensing valve of embodiment 1 with a pump device.

Fig. 12 is a schematic diagram showing the correspondence between the flow rate and the rotational speed of the pump device in the fluid supply system of fig. 11.

Fig. 13 is a schematic view of a structure of the fluid supply system of fig. 11 applied to a washing machine scene.

Fig. 14 is an axial sectional view of the fluid dispensing valve of embodiment 2 of the present invention.

Fig. 15 is a cross-sectional view of a fluid supply system combining the fluid dispensing valve of example 2 with a dual outlet second pump device.

Reference numerals:

the fluid distribution valve 10, the valve cap 11, the valve cap main body portion 111, the second outflow pipe 112, the first ear portion 113, the second fluid outflow chamber 114, the annular bead 115, the valve seat 12, the valve seat main body portion 121, the valve seat first flange-like portion 122, the valve seat second flange-like portion 123, the third deflector hole 124, the fourth deflector hole 125, the valve body 13, the valve body main body portion 131, the step 132, the first outflow pipe 133, the inflow pipe 134, the second ear portion 135, the fluid inflow chamber 136, the first fluid outflow chamber 137, the first opening and closing member 14, the first valve membrane 141, the outer peripheral portion 141a, the circular plate portion 141b, the flexible portion 141c, the first deflector hole 141d, the valve plate 142, the support portion 1421, the first deflector hole 1422, the first elastic member 15, the second opening and closing member 16, the second valve membrane 161, the valve stem 162, the annular flange 1621, the fifth deflector hole 1622, the blind hole 1623, the second elastic member 17, the deflector 18; a pump device 20, a discharge port 201; a second pump device 20', a first discharge port 201', and a second discharge port 202'; a washing machine 30, a housing 31, an outer tub 32, an observation window 33, a circulation hose 34, and a drain hose 35; a fluid supply system 100, a clamp 101; a second fluid supply system 100'.

Detailed Description

As shown in the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. In describing the structure of the device and system of the present invention, the fluid is directed to the front or front side, and the fluid is discharged to the rear or rear side. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

As shown in fig. 1 to 3, the fluid distribution valve 10 of embodiment 1 of the present invention has a valve cover 11, a valve body 13 fixedly connected to one end (here, the front end) of the valve cover 11, and a valve seat 12 installed therebetween, the valve seat 12 dividing a space defined by the valve cover 11 and the valve body 13 into a fluid inlet chamber 136, a first fluid outlet chamber 137, and a second fluid outlet chamber 114.

As shown in fig. 4, the valve cover 11 has a cylindrical valve cover main body portion 111 having one end opened, and a second outflow pipe 112 extending axially outwardly from the center of the bottom end of the valve cover main body portion 111, an annular bead 115 (see fig. 2) extending axially inwardly from the bottom end of the valve cover main body portion 111, a plurality of first lugs 113 protruding radially outwardly from the front section of the valve cover main body portion 111, and a plurality of holes formed in the first lugs 113 for screw fixation.

As shown in fig. 5, the valve seat 12 has a cylindrical valve seat main body portion 121 with an opening at one end, a valve seat first flange portion 122 is formed by extending radially outwards from the rear end (bottom end) of the valve seat main body portion 121, the outer diameter of the first flange portion 122 of this embodiment is larger than that of the valve cover main body portion 111, a plurality of through holes are uniformly distributed in the circumferential direction of the outer diameter for screwing and fixing the valve cover 11 and the valve body 13, a fourth diversion hole 125 is arranged in the center of the rear end (bottom end) of the valve seat main body portion 121, and the fourth diversion hole 125 is used for communicating the fluid inlet cavity 136 with the second fluid outlet cavity 114; a second flange-like portion 123 of the valve seat is formed to extend radially outwardly from a front end (open end) of the valve seat body portion 121, the second flange-like portion 123 being provided with a plurality of third pilot holes 124, the third pilot holes 124 being for communicating the fluid inlet chamber 136 with the first fluid outlet chamber 137.

As shown in fig. 6, the valve body 13 has a tubular valve body portion 131 having one end open, the valve body portion 131 has a diameter-enlarged forming step 132 adjacent to the opening, a first outflow pipe 133 is formed by projecting radially outwardly from the outer periphery of the diameter-enlarged portion of the valve body portion, an inflow pipe 134 is formed by projecting radially outwardly from the center of the front end (bottom end) of the valve body portion 131, a plurality of second lugs 135 are formed uniformly on the outer periphery of the diameter-enlarged portion of the valve body portion 131, and the second lugs 135 are provided with holes for screw fixation.

Fig. 2 is a reset state diagram of the assembled fluid dispensing valve 10, fig. 3 is an enlarged view of the I-shaped part of fig. 2, and as shown in the drawing, the valve seat 12 is assembled coaxially with the valve body 13, wherein the second flange-shaped part 123 of the valve seat 12 is axially limited on the step 132, is radially limited on the inner wall peripheral surface of the enlarged diameter section of the valve body main body part 131, that is, is fitted or in small clearance fit with the inner wall of the enlarged diameter section of the valve body main body part 131, a rubber gasket watertight seal is arranged between the second flange-shaped part 123 and the step 132, the valve seat 12 is screwed and fixed with the second lug part 135 of the valve body through holes uniformly distributed along the circumferential direction of the outer periphery of the first flange-shaped part 122, and a rubber gasket watertight seal is also arranged between the first flange-shaped part 122 and the valve body 13. Thus, the valve body portion is formed adjacent to the inner periphery of the opening section (the enlarged diameter section), the front side of the first flange-like portion 122, the rear side of the second flange-like portion 123, and the outer periphery of the valve seat body portion 121 to form a first fluid outflow chamber 137; the valve body front section (diameter-invariant section) and the inner periphery of the valve seat body 121 cooperate to form a fluid inlet chamber 136. A first opening and closing assembly 14 is provided in the fluid inlet chamber 136, and the first opening and closing assembly 14 includes a first valve membrane 141 made of an elastic material similar to rubber, and a valve plate 142 fixedly connected to the first valve membrane 141 for supporting, wherein the valve plate 142 has a circular supporting portion 1421 provided with a plurality of second flow guiding holes 1422. As shown in fig. 7, the first valve film 141 includes an annular thick outer peripheral portion 141a provided on the rear outer edge, a thick circular disk portion 141b provided on the front center, and a flexible thin-walled flexible portion 141c connecting the outer peripheral portion 141a and the disk portion 141 b. The valve plate 142 is located between the outer peripheral portion 141 and the circular plate portion 141b, the outer periphery and a part of the front end surface of the valve plate 142 are wrapped by the flexible portion 141c, and the flexible portion 141c is provided with a plurality of first flow guiding holes 141d, and the first flow guiding holes 141d and the second flow guiding holes 1421 are aligned correspondingly so that fluid can be conducted. The back side of the first opening and closing assembly 14 is provided with a first elastic member 15, and the first elastic member 15 is preferably a spring, which applies an initial opening and closing force F1 to the first opening and closing assembly 14, so that the circular plate portion 141b of the first valve film 141 is attached to the water outlet end of the inflow tube 134 of the valve body 13, and closes the fluid conduction between the inflow tube 134 and the fluid inlet 136. Further, the valve cover 11 is coaxially assembled with the valve seat 12, the valve seat 12 is also fixedly connected with the first lug 113 of the valve cover in a screwed manner through holes uniformly distributed on the outer periphery of the first flange-shaped part 122, and a rubber gasket is arranged between the front end of the valve cover 11 and the first flange-shaped part 122 for watertight sealing. In this way, the inner periphery of the valve cover main body 111 and the rear side of the first flange 122 are combined to form the second fluid outflow chamber 114. The second opening and closing assembly 16 is disposed in the second fluid outflow chamber 114, the second opening and closing assembly 16 includes a second valve membrane 161 made of rubber-like elastic material, and a cylindrical valve rod 162 fixedly connected to the second valve membrane 161 for supporting purposes, the outer circumference of the cylindrical body of the cylindrical valve rod 162 extends radially outwards to form an annular flange 1621, and the annular flange 1621 is provided with a plurality of fifth diversion holes 1622 for fluid communication, although it is also possible to provide notches on the outer edge of the annular flange 1621 for fluid communication. The outer circumference of the annular flange 1621 is adapted to the inner wall of the annular rib 115 of the valve cover to limit and guide the axial displacement of the second opening and closing assembly 16, the rear side of the annular flange 1621 is provided with a second elastic member 17, and the second elastic member 17 applies an initial opening and closing force F2 to the second opening and closing assembly 16, so that the second valve film 161 is attached to the bottom end of the valve seat main body 121 to close the fourth diversion hole 125 in the center of the bottom end. The second elastic member 17 is preferably a spring. Wherein the elastic force F2 is larger than the elastic force F1. In the fluid distribution valve of this embodiment, when in the reset state, the flow to both the first outflow pipe and the second outflow pipe is closed, and the fluid distribution valve is in the first closed state.

In other embodiments, the first valve film 141 may not include the flexible portion 141c and the first guide hole 141d provided therein, and the same performance may be achieved by providing the disk portion 141b and the outer peripheral portion 141a at the front and rear ends of the support portion 1421. In addition, further, a guide rod 18 is fixedly arranged in the center of the rear side of the valve plate 142 of the first opening and closing assembly 14, a blind hole 1623 is arranged in the center of the valve rod 162 of the second opening and closing assembly 16, and the rear section of the guide rod 18 is slidably sleeved in the blind hole 1623. Meanwhile, in order to avoid that before the first opening and closing assembly 14 is displaced backward to close the third guide hole 124, the guide rod 18 pushes the second opening and closing assembly 16 first to open the fourth guide hole 125 by mistake, the sliding distance of the guide rod 18 in the blind hole 1623 is set to be L2, and the maximum distance of movement of the outer peripheral portion 141a when closing the third guide hole 124 is set to be L1, then L2 should be greater than L1.

Fig. 8 to 10 are views showing the operation states of the fluid distribution valve 10 according to the present embodiment under different fluid pressures from the same fluid supply source when the valve is opened. As shown in fig. 8, when the pressure F of the fluid flowing into the inflow tube 134 is greater than the initial opening and closing force F1 applied by the first elastic member 15 but less than the initial opening and closing force F2 applied by the second elastic member 17, the first opening and closing assembly 14 is displaced backward (generally upward in fig. 8) away from the water outlet end of the inflow tube 134, the fluid enters the fluid inlet chamber 136 and enters the first fluid outlet chamber 137 through the third diversion hole 124, and finally flows out of the outside of the distribution valve through the first outflow tube 133, and the fluid distribution valve 10 is in the first communicating state (the fluid flow path is shown by the arrow in the figure); as shown in fig. 9, when the pressure F of the fluid flowing from the inflow pipe 134 continues to increase to a certain set value, at this time, the first opening and closing assembly 14 continues to move backward until the peripheral portion 141a thereof contacts the front end face of the second flange-shaped portion 123 of the valve seat, so as to close the third diversion hole 124, at this time, the fluid cannot enter the first fluid outflow cavity 137 and flow out from the first outflow pipe 133, and the fluid enters the inner cavity of the valve seat main body 121 from the first diversion hole 141d and/or the second diversion hole 1422, but because the pressure F of the fluid is still smaller than the initial opening and closing force F2 applied by the second elastic member 17 to the second opening and closing assembly 16, the second opening and closing assembly 16 still closes the fourth diversion hole 125, at this time, neither the second outflow pipe 112 nor the first outflow pipe 133 can conduct the fluid, and the fluid distribution valve 10 is in the second closed state, so that the fluid cannot conduct the fluid (the fluid flow path is shown by the arrow in the figure); as shown in fig. 10, when the pressure F of the fluid flowing in from the inflow pipe 134 continues to increase to be greater than the initial opening and closing force F2 applied to the second opening and closing assembly 16 by the second elastic member 17, at this time, the second opening and closing assembly 16 is displaced rearward (generally upward in fig. 10), leaving the rear end of the valve seat main body portion 121, the fluid enters the second fluid outflow chamber 114 from the fourth pilot hole 125, and flows out of the outside of the distribution valve through the second outflow pipe 112, and the fluid distribution valve 10 is in the second communication state (the fluid flow path is shown by an arrow in the drawing).

When the fluid distribution valve 10 of the present embodiment is closed, the fluid supply source is removed, the opening and closing force F2 of the second elastic member is first recovered to reset the second opening and closing assembly 16, the fluid distribution valve is sequentially switched from the second circulation state to the second closed state and the first circulation state, and the opening and closing force F1 of the first elastic member is smaller and then recovered to reset the first opening and closing assembly, so that the fluid distribution valve is switched to the first closed state.

As shown in fig. 11, the inflow pipe 134 of the fluid distribution valve 10 is sleeved on the discharge pipe 201 of the pump device 20, and the connection manner may be a fixed connection manner such as interference fit, adhesion, ultrasonic welding, or a connection manner such as hose sleeving or adhesion, and in this embodiment, a fixed connection manner in which the connection is directly sleeved and then clamped by the clamp 101 is adopted. The rotation speed of the motor of the pump device 20 is controlled by a control device (not shown), and the rotation speed of the impeller is controlled, thereby forming a fluid supply system 100 capable of supplying fluid to two channels. For example, a circuit (not shown) including a microprocessor, a switching element, and the like is incorporated in the control device, and the motor rotation speed of the pump device 20 is controlled by a frequency conversion system or the like. With this control device, in the fluid supply system 100, the pressure of the fluid introduced into the inflow pipe 134 can be adjusted, and the function of supplying the fluid to the two channels can be realized, as follows: as shown in fig. 12, when the control device drives the impeller of the pump device 20 to rotate at a lower rotation speed, for example, less than the set value V1 in the drawing, the fluid pressure discharged from the discharge pipe 201 of the pump device 20 is small, the first opening/closing member 14 of the fluid distribution valve 10 cannot be opened, the fluid cannot be conducted through the fluid distribution valve 10, and the fluid distribution valve 10 is in the first closed state; when the rotation speed of the impeller of the pump device 20 is greater than the set value V1 and less than the set value V2, the fluid pressure discharged from the discharge pipe 201 of the pump device 20 is greater than the actuation force F1 of the first opening and closing assembly 14 but less than the actuation force F2 of the second opening and closing assembly 16, the first opening and closing assembly 14 is opened, the fluid is discharged to the outside of the valve through the first outflow pipe 133, and the fluid distribution valve 10 is in the first circulation state; when the impeller rotation speed of the pump device 20 continues to increase to be greater than the set value V2 but less than the set value V3, the fluid pressure discharged from the discharge pipe 201 of the pump device 20 continues to push the first opening and closing assembly 14 to displace until the passage of the fluid through the first outflow pipe 133 is closed, at this time, the fluid pressure is still less than the actuating force F2 of the second opening and closing assembly 16, the second opening and closing assembly 16 cannot be opened, the fluid cannot be conducted through any outflow pipe of the fluid distribution valve 10, and the fluid distribution valve 10 is in the second closed state; when the rotational speed of the impeller of the pump device 20 continues to increase to be greater than the set value V3, the pressure of the fluid discharged from the discharge pipe 201 of the pump device 20 is greater than the actuating force F2 of the second opening and closing assembly 16, and the first opening and closing assembly 14 still closes the passage of the fluid through the first outflow pipe 133, but can push the second opening and closing assembly 16 to displace, opening the passage of the fluid out of the valve through the second outflow pipe 122, and at this time, the fluid distribution valve 10 is in the second circulation state.

Fig. 13 is an embodiment of a fluid supply system 100 applied to a washing machine scene, wherein the fluid supply system 100 is connected with various pipelines, the drum washing machine 30 comprises a shell 31, an observation window 33 is arranged in front of the shell 31 and is used for observing the inner environment of an inner barrel, an annular cavity (not shown) is circumferentially arranged on the observation window 33, a plurality of circulating water nozzles are arranged on the inner circumference of the annular cavity, an outer barrel 32 is suspended and fixed in the shell 31, the inner barrel (not shown) is rotatably arranged in the outer barrel 32, the lower part of the outer barrel 32 is connected with the fluid supply system 100, a second outflow pipe 112 of the fluid supply system 100 is communicated with a washing machine drainage hose 35, washing wastewater is discharged out of the outer barrel 32 through the drainage hose 35, the drainage flow is high, the lift is high, and a control device (not shown) is required to control the impeller of a pump device to rotate at a high speed; the first outflow pipe 133 of the fluid supply system 100 is connected to the circulation hose 34 of the washing machine, and the circulation hose 34 is connected to the annular chamber, so that the circulation water supplied from the circulation hose 34 can be sprayed to the laundry in the inner tub through the circulation water nozzle of the annular chamber, the circulation water flow rate is small, the lift is also lower than the drain lift, and at this time, the control device (not shown) controls the impeller of the pump device to rotate at a lower rotation speed.

The fluid to be dispensed by the fluid dispensing valve 10 is not limited to a liquid, but may be a gas, and the fluid supply source is not limited to a pump device, and any other fluid supply mechanism having a selectable pressure may be used.

As shown in fig. 14, the fluid distribution valve of the present embodiment may have the following modified design on the basis of embodiment 1: the outer diameter of the first flange-like portion 122 of this embodiment is smaller than the outer diameter of the valve body main portion 131, a step is provided at the open end of the valve body main portion 131 for limiting the first flange-like portion 122, flanges or flanges for mutual fixation are respectively provided on the outer circumferences of the open ends of the valve cover main portion 111 and the valve body main portion 131 to extend radially outwards, and the first flange-like portion 122 of the valve seat is pressed at the same time when the valve cover 11 is screwed and fixed with the valve body 13. Other structures and operation processes are substantially the same as those of embodiment 1, and are not described in detail herein.

As shown in fig. 15, the inflow pipes of the two fluid distribution valves 10 are connected to the two discharge pipes of the second pump device 20 'having the double discharge ports, respectively, and the rotation direction and rotation speed of the impeller of the pump device are controlled by a control device (not shown), so that a second fluid supply system 100' capable of supplying fluid to four circuits is formed. The second pump device 20 'has a first discharge pipe 201' and a second discharge pipe 202', and the first discharge pipe 201' and the second discharge pipe 202 'are positioned on symmetrical sides of a pressure chamber of the second pump device 20', are tangential to the inner wall of the pressure chamber, and can discharge fluid at different discharge pressures according to the rotation direction and rotation speed of an impeller driven by a motor. Thus, the second fluid supply system 100 'of the present embodiment can selectively supply fluid to four flow direction supply paths by controlling the rotation direction of the impeller thereof and the rotation speeds of the impellers in different rotation directions using a simple structure of only one second pump device 20', specifically exemplified as follows:

the second fluid supply system 100' is applied to an automobile (not shown), and is capable of supplying a washing liquid (fluid) to four circuits corresponding to a front window, a rear window, a left headlight, and a right headlight, and the operation is described in detail as follows:

first, when the driver operates a switch for supplying the washing liquid, the control device determines which of the rear window, the front window, the left headlight, and the right headlight the execution command generated by the switch operation is with respect to. When the execution command is for the rear window, the control device drives the impeller of the second pump device 20 'to rotate forward at a low speed (in the direction of arrow a in the figure, V1< V2), at this time, the washing liquid entering the first discharge pipe 201' of the second pump device 20 'reaches a certain discharge pressure (for example, pressure 150 kpa), the first opening and closing means of the fluid distribution valve communicating with the first discharge pipe 201' is opened, the washing liquid is supplied to the rear window through the first discharge pipe of the fluid distribution valve, at this time, since the outflow direction of the second discharge pipe 202 'deviates from the flow direction of the fluid in the pressure chamber, the washing liquid pressure entering the second discharge pipe 202' is small, the first opening and closing means of the fluid distribution valve communicating with the second discharge pipe 202 'cannot be opened, and the fluid supply path at the end of the second discharge pipe 202' is not conducted; when an instruction is executed with respect to the front window, the control device drives the impeller of the second pump device 20' to rotate reversely at a low speed (in the direction of arrow B in the figure, V1< V2), at this time, the washing liquid entering the second discharge pipe 202' of the second pump device 20' reaches a certain discharge pressure (for example, pressure 150 kpa), the first opening and closing means of the fluid distribution valve communicating with the second discharge pipe 202' is opened, the washing liquid is supplied to the front window through the first discharge pipe of the fluid distribution valve, at the same time, the washing liquid pressure entering the first discharge pipe 201' is small, the first opening and closing means of the fluid distribution valve communicating with the first discharge pipe 201' cannot be opened, and the fluid supply path at the end of the first discharge pipe 201' is not conducted; when an instruction is executed with respect to the left headlight, the control device drives the impeller of the second pump device 20 'to rotate forward at a high speed (in the direction of arrow a in the figure, V > V3), at this time, the washing liquid entering the first discharge pipe 201' of the second pump device 20 'reaches a relatively high pressure (for example, a pressure of 300 kpa), the first opening/closing means 14 of the fluid distribution valve communicating with the first discharge pipe 201' is pushed to displace backward to close the flow path through which the washing liquid is conducted through the first discharge pipe 133, the second opening/closing means 16 of the fluid distribution valve is opened, the washing liquid is supplied to the left headlight through the second discharge pipe 112, and at this time, since the outflow direction of the second discharge pipe 202 'deviates from the flow direction of the fluid in the pressure chamber, the washing liquid entering the second discharge pipe 202' is small, the first opening/closing means of the fluid distribution valve communicating with the second discharge pipe 202 'cannot be opened, and the fluid supply path at the end of the second discharge pipe 202' is not conducted; when an instruction is executed with respect to the right headlight, the control device drives the impeller of the second pump device 20' to rotate at a high speed (in the direction of arrow B in the figure, V > V3), and at this time, the washing liquid entering the second discharge pipe 202' of the second pump device 20' reaches a relatively high pressure (for example, a pressure of 300 kpa), the first opening/closing means of the fluid distribution valve communicating with the second discharge pipe 202' is pushed to displace rearward to close the flow path through which the washing liquid is conducted through the first discharge pipe, the second opening/closing means of the fluid distribution valve is opened, the washing liquid is supplied to the right headlight through the second discharge pipe 112 of the fluid distribution valve, and similarly, at this time, the washing liquid entering the first discharge pipe 201' is relatively small in pressure due to the direction of the flow of the fluid in the pressure chamber, the first opening/closing means of the fluid distribution valve communicating with the first discharge pipe 201' cannot be opened, and the fluid supply path at the end of the first discharge pipe 201' is not conducted. The above operation clearly shows that the four fluid distribution circuits of the second fluid supply system 100' can supply fluid independently, and no mixed flow phenomenon of fluid flowing through different flow pipes simultaneously occurs.

The foregoing examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.

Claims

1. A fluid distribution valve for selectively distributing a fluid supplied from a fluid supply source to a plurality of outflow pipes, comprising a valve body (13) having an inflow pipe (134) and a first outflow pipe (133) which are communicated with the fluid supply source, a valve seat (12), and a valve cover (11) having a second outflow pipe (112), wherein the valve seat (12) divides a space where the valve cover (11) and the valve body (13) are fixedly enclosed into a fluid inlet chamber (136) communicated with the inflow pipe (134), a first fluid outlet chamber (137) communicated with the first outflow pipe (133), and a second fluid outlet chamber (114) communicated with the second outflow pipe (112), a third diversion hole (124) is provided at the front end of the valve seat (12) to communicate the fluid inlet chamber (136) with the first fluid outlet chamber (137), and a fourth diversion hole (125) is provided at the center of the rear end of the valve seat (12) to communicate the fluid inlet chamber (136) with the second fluid outlet chamber (114), characterized by further comprising:

-a first opening and closing assembly (14) disposed in the fluid inlet chamber (136), wherein a first elastic member (15) is disposed at the rear side of the first opening and closing assembly (14) to apply an initial opening and closing force F1 to the first opening and closing assembly (14), so that the first opening and closing assembly (14) closes the communication between the inflow tube (134) and the fluid inlet chamber (136) in a reset state, and the first opening and closing assembly (14) can displace along the axial direction to open the communication between the inflow tube (134) and the fluid inlet chamber (136) or simultaneously close the third deflector hole (124) according to the fluid pressure of the fluid supply source supplied to the inflow tube (134);

-a second opening and closing assembly (16) disposed in the second fluid outflow chamber (114), wherein a second elastic member (17) is disposed at the rear side of the second opening and closing assembly (16) to apply an initial opening and closing force F2 to the second opening and closing assembly (16), so that the second opening and closing assembly (16) closes the fourth guide hole (125) in a reset state, and the second opening and closing assembly (16) can displace along the axial direction to open the fourth guide hole (125) according to the fluid pressure of the fluid supply source supplied to the inflow tube (134);

-the first opening and closing assembly (14) and the second opening and closing assembly (16) are opened and closed in the same direction under the driving force provided by the same fluid supply source, and F2 is greater than F1.

2. The fluid dispensing valve in accordance with claim 1 in which said second opening and closing assembly (16) comprises a second valve membrane (161), a tubular valve stem (162) fixedly connected to said second valve membrane (161) and serving as a support, said second resilient member (17) being a spring which is disposed over said valve stem (162) and urges said second valve membrane (161) against said valve seat (12) back end to close said fourth orifice (125).

3. The fluid dispensing valve in accordance with claim 2 in which the first opening and closing assembly (14) includes a first valve membrane (141), a valve plate (142) fixedly connected to the first valve membrane (141) for supporting purposes; the valve plate (142) has a disk-shaped supporting portion (1421) provided with a second deflector hole (1422) penetrating the front and rear ends thereof; the first valve film (141) comprises an annular outer peripheral part (141 a) arranged at the rear outer edge and a circular disc part (141 b) arranged at the front center; the support part (1421) is located between the outer peripheral part (141 a) and the circular plate part (141 b), the circular plate part (141 b) is used for opening and closing the conduction of the inflow pipe (134), and the outer peripheral part (141 a) is used for opening and closing the conduction of the third diversion hole (124).

4. The fluid distribution valve according to claim 3, wherein the first valve film (141) has a flexible thin-walled flexible portion (141 c) connecting the outer peripheral portion (141 a) and the circular plate portion (141 b), and the flexible portion (141 c) is provided with the first deflector hole (141 d) at a position corresponding to the second deflector hole (1422).

5. The fluid dispensing valve as claimed in claim 3 or 4, wherein a guide rod (18) is fixedly arranged at the center of the rear side of the valve plate (142), a blind hole (1621) is arranged at the center of the valve rod (162), and the rear section of the guide rod (18) is slidably sleeved in the blind hole (1621).

6. A fluid supply system for selectively supplying fluid to a plurality of fluid supply paths, comprising: pump means (20, 20') for discharging said fluid; fluid dispensing valve (10) according to any one of claims 1-5 connected to said pump means (20, 20'); and a control device for controlling the fluid discharge pressure of the pump device (20, 20').

7. A fluid supply system according to claim 6, characterized in that the pump device (20) has a single discharge opening, the discharge opening (201) being in communication with the inflow tube (134) of the fluid distribution valve, the control device regulating the fluid discharge pressure level of the discharge opening (201) by controlling the rotational speed of the impeller of the pump device (20).

8. The fluid supply system according to claim 6, wherein the pump device (20 ') has two discharge ports, a first discharge port (201') and a second discharge port (202 '), the first discharge port (201') and the second discharge port (202 ') being respectively connected to inflow pipes of different fluid distribution valves, and the control device controls the discharge and pressure of the fluid at the two discharge ports by controlling the rotation direction and rotation speed of an impeller of the pump device (20').

9. A washing apparatus characterized in that it is provided with a fluid supply system as claimed in claim 6 or 7.

10. An automobile, characterized in that it is provided with a fluid supply system according to any one of claims 6-8.