A fluid dispensing valve and a fluid supply system having the same

Abstract

The present application provides a fluid distribution valve, comprising: a first opening and closing assembly arranged in a fluid inlet chamber, the first opening and closing assembly being displaceable along an axis to selectively open and close the communication between a flow inlet pipe and the fluid inlet chamber, and to close the communication between the fluid inlet chamber and a first fluid outlet chamber; and a second opening and closing assembly arranged in a second fluid outlet chamber, the second opening and closing assembly being displaceable along the axis to selectively open and close the communication between the fluid inlet chamber and the second fluid outlet chamber. The present application also provides a fluid supply system, comprising: a pump device for discharging the fluid; and the fluid distribution valve connected to the pump device. The fluid distribution valve does not have the problem of mixed flow in different outlet circuits during use, and is particularly suitable for application scenarios requiring more than two distribution circuits. The fluid supply system of the present application achieves the control function of supplying fluid to multiple fluid distribution circuits by controlling the motor speed of the pump device, thereby eliminating the need for electrically driven control of the valve stem.

Description

Technical Field

[0001] This invention relates to a fluid distribution valve controlled by a fluid supply source pressure and a fluid supply system having the valve, IPC classification F16K 11 / 044. Background Technology

[0002] Typically, fluid supply systems need to distribute fluid according to the requirements of different application scenarios. For example, a washing machine needs to discharge wash water from the washing tub to an external drain pipe or circulate the wash water back to the washing tub through a circulation pipe. To deliver the wash water discharged from the washing tub to the drain pipe or circulation pipe, two pumps connected to each pipe are required, resulting in the cost of two pumps. Alternatively, a single pump can be used to rotate clockwise or counterclockwise, allowing the fluid to flow through the circulation pipe and drain pipe in both directions. In this case, the cost is reduced, but there is a possibility of backflow due to pump motor failure.

[0003] Chinese patent CN110359240B discloses a washing machine that uses a valve assembly. This assembly, by utilizing the different pressures of the fluid supply source, can either circulate the washing water discharged from the pump back into the washing tub or discharge the washing water to the outside of the machine. The circulation path in this design is normally open, resulting in a prolonged mixed flow state where the discharge and circulation paths are simultaneously open. This can lead to poor performance, and is particularly unsuitable for applications requiring more than two fluid loops.

[0004] For other relevant terms and common knowledge, please refer to the "Mechanical Engineering Handbook" and "Electrical Engineering Handbook" (compiled by the Machinery Industry Press, 2nd edition, 1997), and the national standard GB / T 21465 "Valve Terminology". Summary of the Invention

[0005] To address the problems described in the background art, the present invention provides a fluid distribution valve that selectively distributes fluid supplied from a fluid supply source to multiple pipes. The valve includes a valve body having an inlet pipe communicating with the fluid supply source and a first outlet pipe, a valve seat, and a valve cover having a second outlet pipe. The valve seat divides the space enclosed by the valve cover and valve body after fixation into a fluid inlet chamber communicating with the inlet pipe, a first fluid outlet chamber communicating with the first outlet pipe, and a second fluid outlet chamber communicating with the second outlet pipe. A third guide hole is provided at the front end of the valve seat to connect the fluid inlet chamber and the first fluid outlet chamber, and a fourth guide hole is provided at the center of the rear end of the valve seat to connect the fluid inlet chamber and the second fluid outlet chamber. The valve also includes:

[0006] —A first opening and closing component is disposed in the fluid inlet chamber. A first elastic element is provided on 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 connection between the inlet pipe and the fluid inlet chamber in the reset state. According to the fluid pressure supplied to the inlet pipe by the fluid supply source, the first opening and closing component can be displaced along the axial direction to open the connection between the inlet pipe and the fluid inlet chamber, or simultaneously close the third guide hole.

[0007] —The second opening and closing assembly is located in the second fluid outflow chamber. A second elastic element is provided on the rear side of the second opening and closing assembly 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 guide hole in the reset state. According to the fluid pressure supplied by the fluid supply source into the inflow pipe, the second opening and closing assembly can be displaced along the axial direction to open the fourth guide hole.

[0008] —The first and second opening and closing components 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.

[0009] When the fluid distribution valve of the present invention is reset, the flow to both the first and second outlet pipes is closed; this is the first closed state of the fluid distribution valve. When the flow to the first outlet pipe is open, the flow to the second outlet pipe is closed; this is the first open state of the fluid distribution valve. When the flow to the second outlet pipe is open, the flow to the first outlet pipe is closed; this is the second open state of the fluid distribution valve. When switching from open flow to open flow to open flow to open flow to the second outlet pipe, there is a process where the flow to both the first and second outlet pipes is closed; this is the second closed state of the fluid distribution valve. Since the first and second opening / closing components open and close in the same direction under the driving force provided by the same fluid supply source, and the initial opening / closing force F2 of the former is greater than the initial opening / closing force F1 of the latter, the fluid distribution valve exhibits the following process under the action of the same driving force:

[0010] —When opened, a drive is applied. The opening and closing force of the first elastic element is relatively small and is first overcome, causing the first opening and closing assembly to operate. The fluid distribution valve sequentially changes from the first closed state to the first flow state and the second closed state. The opening and closing force of the second elastic element is relatively large and is then overcome, causing the second opening and closing assembly to operate. The fluid distribution valve then changes to the second flow state.

[0011] —When closed, the drive is disengaged. The opening and closing force of the second elastic element is relatively large, so the second opening and closing assembly is restored first, and the fluid distribution valve is sequentially changed from the second flow state to the second closed state and the first flow state. The opening and closing force of the first elastic element is relatively small, so the first opening and closing assembly is restored next, and the fluid distribution valve is changed to the first closed state.

[0012] As can be seen, the fluid distribution valve undergoes a second closed state—the flow to both the first and second outlet pipes is shut off—regardless of whether it transitions from the first flow state to the second flow state or vice versa. Therefore, this fluid distribution valve prevents the mixing of flows from different outlet pipes simultaneously, facilitating independent control of each fluid distribution valve's opening and closing. This makes it particularly suitable for applications requiring more than two fluid distribution loops.

[0013] Furthermore, the second opening and closing assembly includes a second valve diaphragm, a cylindrical valve stem fixedly connected to the second valve diaphragm and serving as a support, and the second elastic element is a spring, which is sleeved on the valve stem and pushes the second valve diaphragm to press against the rear end of the valve seat to close the fourth guide hole.

[0014] Furthermore, the first opening and closing assembly includes a first valve diaphragm and a valve plate fixedly connected to the first valve diaphragm for support purposes; the valve plate has a disc-shaped support portion, which is provided with a second guide hole penetrating its front and rear ends; the first valve diaphragm includes an annular outer peripheral portion provided on the rear outer edge and a circular plate portion provided on the front center; the support portion is located between the outer peripheral portion and the circular plate portion, the circular plate portion is used to open and close the flow pipe, and the outer peripheral portion is used to open and close the third guide hole.

[0015] Furthermore, the first valve diaphragm has a flexible, thin-walled portion that connects the outer periphery to the circular plate portion, and the flexible portion has a first guide hole at the position corresponding to the second guide hole.

[0016] Preferably, a guide rod is fixedly provided at the center of the rear side of the valve plate, and a blind hole is provided at the center of the valve stem. The rear section of the guide rod can be slidably sleeved in the blind hole. This design guides the axial movement of the first opening and closing assembly, which is beneficial to the smooth and reliable movement of the first opening and closing assembly.

[0017] In addition, the present invention also provides a fluid supply system that selectively supplies fluid to multiple fluid supply paths, comprising: a pump device for discharging the fluid; the fluid distribution valve connected to the pump device; and a control device for controlling the fluid discharge pressure of the pump device.

[0018] Preferably, the pump assembly has a single discharge port, the magnitude of which varies depending on the impeller's rotational speed, and the discharge port is connected to the inlet pipe of the fluid distribution valve.

[0019] Preferably, the pump device has two discharge ports, namely a first discharge port and a second discharge port. The first discharge port is connected to the inlet pipe of a fluid distribution valve, and the second discharge port is connected to the inlet pipe of another fluid distribution valve. The two discharge ports discharge fluid at their respective discharge pressures, the magnitude of which varies depending on the impeller's rotation direction and speed.

[0020] The fluid supply system of the present invention controls the motor speed of the pump device through a control device, and adjusts the fluid pressure in the inflow pipe leading to the fluid distribution valve, thereby realizing the control function of supplying fluid to multiple fluid supply paths and eliminating the need for electric drive control of the valve stem.

[0021] In addition, the present invention also provides a washing device equipped with the above-mentioned fluid supply system.

[0022] In addition, the present invention also provides an automobile equipped with the above-described fluid supply system. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the fluid distribution valve in Embodiment 1 of the present invention.

[0024] Figure 2 This is a cross-sectional view of the fluid distribution valve in the first closed (reset) state of Embodiment 1 of the present invention.

[0025] Figure 3 yes Figure 2 A magnified view of a portion of the image (I).

[0026] Figure 4 This is a schematic diagram of the valve cover of the fluid distribution valve in Embodiment 1 of the present invention.

[0027] Figure 5 This is a schematic diagram of the valve seat structure of the fluid distribution valve in Embodiment 1 of the present invention.

[0028] Figure 6 This is a schematic diagram of the valve body of the fluid distribution valve in Embodiment 1 of the present invention.

[0029] Figure 7 This is a schematic diagram of the structure of the first valve diaphragm of the fluid distribution valve in Embodiment 1 of the present invention.

[0030] Figure 8 This is a cross-sectional view of the fluid distribution valve in the first flow state according to Embodiment 1 of the present invention.

[0031] Figure 9 This is a cross-sectional view of the fluid distribution valve in the second closed state according to Embodiment 1 of the present invention.

[0032] Figure 10This is a cross-sectional view of the fluid distribution valve in the second flow state according to Embodiment 1 of the present invention.

[0033] Figure 11 This is a cross-sectional view of a fluid supply system that combines the fluid distribution valve and pump unit of Example 1.

[0034] Figure 12 yes Figure 11 A schematic diagram showing the relationship between the flow rate of the fluid supply system and the speed of the pump unit.

[0035] Figure 13 yes Figure 11 A schematic diagram of a fluid supply system applied to a washing machine.

[0036] Figure 14 This is an axial sectional view of the fluid distribution valve of Embodiment 2 of the present invention.

[0037] Figure 15 This is a cross-sectional view of a fluid supply system that combines the fluid distribution valve of Example 2 with a dual-outlet second pump device.

[0038] Figure label:

[0039] Fluid distribution valve 10, valve cover 11, valve cover body 111, second outlet pipe 112, first ear 113, second fluid outlet cavity 114, annular rib 115, valve seat 12, valve seat body 121, valve seat first flange 122, valve seat second flange 123, third guide hole 124, fourth guide hole 125, valve body 13, valve body body 131, step 132, first outlet pipe 133, inlet pipe 134, second ear 135, fluid inlet cavity 136, first fluid outlet cavity 137, first opening and closing assembly 14, first valve diaphragm 141, outer peripheral portion 141a, circular plate portion 141b, flexible portion 1 41c, first guide hole 141d, valve plate 142, support part 1421, first guide hole 1422, first elastic element 15, second opening and closing assembly 16, second valve diaphragm 161, valve stem 162, annular flange 1621, fifth guide hole 1622, blind hole 1623, second elastic element 17, guide rod 18; pump device 20, discharge port 201; second pump device 20', first discharge port 201', second discharge port 202'; washing machine 30, shell 31, outer drum 32, observation window 33, circulation hose 34, drain hose 35; fluid supply system 100, clamp 101; second fluid supply system 100'. Detailed Implementation

[0040] As shown in the accompanying 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 apparatus or system structure of the present invention, the direction in which the fluid flows is referred to as the front or front side, and the direction in which the fluid flows out is referred to as the rear or rear side. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0041] like Figures 1 to 3 As shown, 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 between them. The valve seat 12 divides the space enclosed 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.

[0042] like Figure 4 As shown, the valve cover 11 has a cylindrical valve cover body 111 with one end open, and a second outflow pipe 112 extending axially outward from the bottom center of the valve cover body 111, and an annular rib 115 extending axially inward from the bottom end of the valve cover body 111 (see...). Figure 2 The valve cover body 111 protrudes radially outward from the front section, forming several evenly distributed first ears 113 on its outer circumferential surface. The first ears 113 are provided with holes for screw fixing.

[0043] like Figure 5 As shown, the valve seat 12 has a cylindrical valve seat body 121 with one end open. A first flange-shaped portion 122 extends radially outward from the rear end (bottom end) of the valve seat body 121. In this embodiment, the outer diameter of the first flange-shaped portion 122 is larger than the outer diameter of the valve cover body 111. Several through holes are evenly distributed around its outer edge for screwing and fixing with the valve cover 11 and the valve body 13. A fourth guide hole 125 is provided in the center of the rear end (bottom end) of the valve seat body 121. The fourth guide hole 125 is used to connect the fluid inlet chamber 136 and the second fluid outlet chamber 114. A second flange-shaped portion 123 extends radially outward from the front end (open end) of the valve seat body 121. The second flange-shaped portion 123 is provided with several third guide holes 124. The third guide holes 124 are used to connect the fluid inlet chamber 136 and the first fluid outlet chamber 137.

[0044] like Figure 6As shown, the valve body 13 has a cylindrical valve body main body 131 with one end open. The valve body main body 131 has a step 132 where the diameter increases near the opening section. A first outlet pipe 133 extends radially outward from the outer periphery of the section where the diameter increases. An inlet pipe 134 extends axially outward from the center of the front end (bottom end) of the valve body main body 131. Several second ears 135 are evenly distributed on the outer periphery of the section where the diameter increases. The second ears 135 are provided with holes for screw fixing connection.

[0045] Figure 2 This is a diagram showing the reset state of the fluid distribution valve 10 after assembly. Figure 3 for Figure 2 As shown in the enlarged view of part I, the valve seat 12 and the valve body 13 are coaxially assembled. The second flange-shaped part 123 of the valve seat 12 is axially limited to the step 132 and radially limited to the inner circumferential surface of the diameter-increasing section of the valve body 131, that is, it fits or has a small gap with the inner wall of the diameter-increasing section of the valve body 131. A rubber gasket is provided between the second flange-shaped part 123 and the step 132 for watertight sealing. The valve seat 12 is screwed to the second ear part 135 of the valve body through the through holes evenly distributed around the outer edge of the first flange-shaped part 122. A rubber gasket is also provided between the first flange-shaped part 122 and the valve body 13 for watertight sealing. Thus, the inner circumference of the valve body main body adjacent to the opening section (diameter-increasing section), the front side of the first flange-shaped portion 122, the rear side of the second flange-shaped portion 123, and the outer circumference of the valve seat main body 121 together form a first fluid outflow cavity 137; the front section of the valve body main body (diameter-unchanged section) and the inner circumference of the valve seat main body 121 together form a fluid inflow cavity 136. A first opening and closing assembly 14 is provided in the fluid inflow cavity 136. The first opening and closing assembly 14 includes a first valve diaphragm 141 made of an elastic material similar to rubber, and a valve plate 142 fixedly connected to the first valve diaphragm 141 for support. The valve plate 142 has a circular support portion 1421, which has several second guide holes 1422. Figure 7As shown, the first valve diaphragm 141 includes an annular, thick-walled outer peripheral portion 141a with its rear outer edge, a thick-walled circular plate portion 141b with its front center, and a flexible, thin-walled, flexible portion 141c connecting the outer peripheral portion 141a and the circular plate portion 141b. A valve plate 142 is located between the outer peripheral portion 141a and the circular plate portion 141b. The outer periphery and part of the front end face of the valve plate 142 are wrapped by the flexible portion 141c. The flexible portion 141c has several first guide holes 141d, which are aligned with and corresponding to second guide holes 1421 to allow fluid to flow. A first elastic element 15, preferably a spring, is provided on the rear side of the first opening and closing assembly 14. This spring applies an initial opening and closing force F1 to the first opening and closing assembly 14, causing the circular plate portion 141b of the first valve diaphragm 141 to adhere to the outlet end of the inflow pipe 134 of the valve body 13, thus closing the fluid connection between the inflow pipe 134 and the fluid inlet chamber 136. Furthermore, the valve cover 11 and valve seat 12 are coaxially assembled. The valve seat 12 is also screwed to the first ear portion 113 of the valve cover through through holes evenly distributed circumferentially along the outer edge of the first flange portion 122. A rubber gasket is provided between the front end of the valve cover 11 and the first flange portion 122 for a watertight seal. Thus, the inner circumference of the valve cover body portion 111 and the rear side of the first flange portion 122 enclose a second fluid outlet chamber 114. A second opening and closing assembly 16 is provided in the second fluid outflow chamber 114. The second opening and closing assembly 16 includes a second valve diaphragm 161 made of an elastic material similar to rubber and a cylindrical valve stem 162 fixedly connected to the second valve diaphragm 161 for support. The outer periphery of the cylindrical valve stem 162 extends radially outward to form an annular flange 1621. The annular flange 1621 is provided with several fifth guide holes 1622 for fluid conduction. Of course, it is also feasible to provide a notch on the outer edge of the annular flange 1621 for fluid conduction. The outer periphery of the annular flange 1621 is adapted to the inner wall of the annular rib 115 of the valve cover, restricting and guiding the axial displacement of the second opening and closing assembly 16. A second elastic member 17 is provided on the rear side of the annular flange 1621. 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 diaphragm 161 fits against the bottom end of the valve seat body 121, closing the fourth guide hole 125 at the center of its bottom end. The second elastic element 17 is preferably a spring. The elastic force F2 is greater than the elastic force F1. In this embodiment, when the fluid distribution valve is in the reset state, the flow to both the first and second outlet pipes is closed, and the fluid distribution valve is in the first closed state.

[0046] In other embodiments, the first valve diaphragm 141 may not include the flexible portion 141c and the first guide hole 141d thereon. The same performance can be achieved simply by providing a circular plate portion 141b and an outer peripheral portion 141a at the front and rear ends of the support portion 1421. Furthermore, a guide rod 18 is fixedly provided at the center of the rear side of the valve plate 142 of the first opening / closing assembly 14, and a blind hole 1623 is provided at the center of the valve stem 162 of the second opening / closing assembly 16. The rear section of the guide rod 18 is slidably fitted into the blind hole 1623. Simultaneously, to prevent the guide rod 18 from accidentally opening the fourth guide hole 125 by pushing the second opening / closing assembly 16 before the first opening / closing assembly 14 moves backward to close the third guide hole 124, the sliding distance of the guide rod 18 in the blind hole 1623 is set to L2, and the maximum movement distance of the outer peripheral portion 141a when closing the third guide hole 124 is set to L1. Therefore, L2 should be greater than L1.

[0047] Figures 8 to 10 This diagram illustrates the operating states of the fluid distribution valve 10 in this embodiment under different fluid pressures from the same fluid supply source when the valve is open. Figure 8 As shown, when the pressure F of the fluid flowing into the inflow pipe 134 is greater than the initial opening and closing force F1 applied by the first elastic element 15, but less than the initial opening and closing force F2 applied by the second elastic element 17, the first opening and closing assembly 14 moves backward. Figure 8 The fluid (approximately upward) shifts away from the outlet end of the inlet pipe 134, enters the fluid inlet chamber 136, and then enters the first fluid outlet chamber 137 through the third guide hole 124. Finally, it flows out of the distribution valve through the first outlet pipe 133, and the fluid distribution valve 10 is in the first flow state (the fluid flow path is shown by the arrow in the figure); Figure 9 As shown, when the pressure F of the fluid flowing in from the inlet pipe 134 continues to increase to a certain set value, the first opening and closing assembly 14 continues to move backward until its outer peripheral portion 141a fits against the front end face of the second flange-shaped portion 123 of the valve seat, closing the third guide hole 124. At this time, the fluid cannot enter the first fluid outlet chamber 137 and flow out from the first outlet pipe 133. The fluid enters the inner cavity of the valve seat body portion 121 from the first guide hole 141d and / or the second guide hole 1422. However, since the fluid pressure F is still less than the initial opening and closing force F2 applied by the second elastic element 17 to the second opening and closing assembly 16, the second opening and closing assembly 16 still closes the fourth guide hole 125. Therefore, at this time, neither the second outlet pipe 112 nor the first outlet pipe 133 can conduct fluid, and the fluid distribution valve 10 is in the second closed state and cannot conduct fluid (the fluid flow path is shown by the arrow in the figure). Figure 10 As shown, when the pressure F of the fluid flowing in from the inlet pipe 134 continues to increase to a level greater than the initial opening and closing force F2 applied by the second elastic element 17 to the second opening and closing assembly 16, the second opening and closing assembly 16 moves backward ( Figure 10The fluid moves approximately upwards, leaving the rear end of the valve seat body 121. The fluid enters the second fluid outlet chamber 114 from the fourth guide hole 125 and flows out of the distribution valve through the second outlet pipe 112. The fluid distribution valve 10 is in the second flow state (the fluid flow path is shown by the arrow in the figure).

[0048] In this embodiment, when the fluid distribution valve 10 is closed, the fluid supply source is removed. The opening and closing force F2 of the second elastic element is relatively large and is restored first, causing the second opening and closing assembly 16 to reset. The fluid distribution valve sequentially changes from the second flow state to the second closed state and then to the first flow state. The opening and closing force F1 of the first elastic element is relatively small and is then restored, causing the first opening and closing assembly to reset. The fluid distribution valve then changes to the first closed state.

[0049] like Figure 11 As shown, the inlet pipe 134 of the fluid distribution valve 10 is sleeved onto the outlet pipe 201 of the pump device 20. The connection can be achieved through interference fit, bonding, ultrasonic welding, or other fixed connection methods. Alternatively, a flexible hose sleeve or bonding connection can be used. In this embodiment, a direct sleeve connection followed by clamping with clamp 101 is used for a fixed connection. The motor speed of the pump device 20 is controlled by a control device (not shown), thereby controlling the impeller's rotational speed and forming a fluid supply system 100 capable of supplying fluid to both channels. For example, the control device may have a built-in circuit (not shown) consisting of a microprocessor, switching elements, etc., which controls the motor speed of the pump device 20 through frequency conversion or other methods. Using this control device, the pressure of the fluid introduced into the inlet pipe 134 can be adjusted in the fluid supply system 100 to achieve the function of supplying fluid to both channels. Specific details are as follows: Figure 12As shown, when the control device drives the impeller of the pump device 20 to rotate at a low speed, for example, less than the set value V1 shown in the figure, the fluid pressure discharged from the discharge pipe 201 of the pump device 20 is small, and the first opening and closing component 14 of the fluid distribution valve 10 cannot be opened. Therefore, the fluid cannot flow through the fluid distribution valve 10, and the fluid distribution valve 10 is in the first closed state. When the impeller speed of the pump device 20 is greater than the set value V1 but less than the set value V2, the fluid pressure discharged from the discharge pipe 201 of the pump device 20 is greater than the starting force F1 of the first opening and closing component 14 but less than the starting force F2 of the second opening and closing component 16. The first opening and closing component 14 opens, and the fluid is discharged to the outside of the valve through the first outlet pipe 133. The fluid distribution valve 10 is in the first open state. When the impeller speed of the pump device 20 continues to increase to greater than the set value V2 but less than the set value V3, the fluid pressure discharged from the discharge pipe 201 is 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 component 14 to move until the passage of fluid through the first outlet pipe 133 is closed. At this time, the fluid pressure is still less than the starting force F2 of the second opening and closing component 16, so the second opening and closing component 16 cannot be opened. The fluid cannot be conducted through any outlet pipe of the fluid distribution valve 10, and the fluid distribution valve 10 is in the second closed state. When the impeller speed of the pump device 20 continues to increase to a value greater than the set value V3, the fluid pressure discharged from the discharge pipe 201 of the pump device 20 is greater than the starting force F2 of the second opening and closing component 16. The first opening and closing component 14 still closes the passage of fluid through the first outlet pipe 133, but can push the second opening and closing component 16 to move, opening the passage of fluid through the second outlet pipe 122 to flow out of the valve. At this time, the fluid distribution valve 10 is in the second open state.

[0050] Figure 13 This is an embodiment of the fluid supply system 100 applied to a washing machine, showing the connection of the fluid supply system 100 to various pipes. The drum washing machine 30 includes a housing 31, with an observation window 33 on the front for observing the internal environment of the inner drum. The observation window 33 has an annular cavity (not shown) circumferentially arranged, and several circulating water nozzles are arranged on the inner circumference of the annular cavity. The outer drum 32 is suspended and fixed inside the housing 31, and the inner drum (not shown) is rotatably disposed inside the outer drum 32. The lower part of the outer drum 32 is connected to the fluid supply system 100, and the second outflow pipe 11 of the fluid supply system 100 is shown. 2. The washing wastewater is discharged from the outer drum 32 through the drain hose 35 of the washing machine. The drainage flow rate is large and the head is high, so the control device (not shown) needs to control the impeller of the pump device to rotate at high speed. The first outlet pipe 133 of the fluid supply system 100 is connected to the washing machine circulation hose 34. The circulation hose 34 is connected to the annular cavity, so that the circulating water transported by the circulation hose 34 can be sprayed onto the clothes in the inner drum through the circulating water nozzle of the annular cavity. The circulation water flow rate is small and the head is lower than the drainage head. At this time, the control device (not shown) controls the impeller of the pump device to rotate at a lower speed.

[0051] Furthermore, the fluid distributed by the fluid distribution valve 10 is not limited to liquids, but can also be gas, and the fluid supply source is not limited to pump devices; other fluid supply mechanisms with selectable pressures can be used arbitrarily.

[0052] like Figure 14 As shown, the fluid distribution valve in this embodiment can be modified from Embodiment 1 as follows: the outer diameter of the first flange-shaped portion 122 is smaller than the outer diameter of the valve body main body portion 131. A step is provided at the opening end of the valve body main body portion 131 to limit the first flange-shaped portion 122. Flanges or flanges for mutual fixing are provided radially outward on the outer periphery of the opening ends of the valve cover main body portion 111 and the valve body main body portion 131, respectively. When the valve cover 11 and the valve body 13 are screwed together, the first flange-shaped portion 122 of the valve seat is pressed tightly. Other structures and working processes are basically the same as in Embodiment 1, and will not be described in detail here.

[0053] like Figure 15 As shown, the inflow pipes of the two fluid distribution valves 10 are respectively connected to the two discharge pipes of the second pump device 20' with dual discharge ports. The rotation direction and speed of the impeller of the pump device are controlled by a control device (not shown), forming a second fluid supply system 100' capable of supplying fluid to four circuits. The second pump device 20' has a first discharge pipe 201' and a second discharge pipe 202', which are located on symmetrical sides of the pressure chamber of the second pump device 20' and tangent to the inner wall of the pressure chamber. It can discharge fluid at different discharge pressures according to the rotation direction and speed of the impeller driven by the motor. Thus, the second fluid supply system 100' of this embodiment uses only the simple structure of a second pump device 20'. By controlling the rotation direction of its impeller and the impeller speed in different rotation directions, it can selectively supply fluid to four flow paths. Specific examples are illustrated below:

[0054] The second fluid supply system 100' is used in automobiles (not shown) and can supply washer fluid (fluid) to four circuits corresponding to the front windshield, rear windshield, left front headlight, and right front headlight. The working process is described in detail below:

[0055] First, when the driver operates the switch for supplying the washing liquid, the control device determines which of the rear window, front window, left front headlight, and right front headlight the execution instruction generated by the switch operation is for. When the execution instruction is for the rear window, the control device drives the impeller of the second pump device 20' to rotate forward at a low speed (rotate in the direction of arrow A in the figure, V1 < V < 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), and the first opening and closing component of the fluid distribution valve connected to the first discharge pipe 201' is opened. The washing liquid is supplied to the rear window through the first outflow pipe of the fluid distribution valve. At this time, since the outflow direction of the second discharge pipe 202' is opposite to the flow direction of the fluid in the pressure chamber, the pressure of the washing liquid entering the second discharge pipe 202' is small and cannot open the first opening and closing component of the fluid distribution valve connected to the second discharge pipe 202', and the fluid supply path at the end of the second discharge pipe 202' is not导通; When the execution instruction is for the front window, the control device drives the impeller of the second pump device 20' to rotate reversely at a low speed (rotate in the direction of arrow B in the figure, V1 < V < 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), and the first opening and closing component of the fluid distribution valve connected to the second discharge pipe 202' is opened. The washing liquid is supplied to the front window through the first outflow pipe of the fluid distribution valve. At the same time, at this time, the pressure of the washing liquid entering the first discharge pipe 201' is small and cannot open the first opening and closing component of the fluid distribution valve connected to the first discharge pipe 201', and the fluid supply path at the end of the first discharge pipe 201' is not导通; When the execution instruction is for the left front headlight, the control device drives the impeller of the second pump device 20' to rotate forward at a high speed (rotate 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, pressure 300 kPa), and the first opening and closing component 14 of the fluid distribution valve connected to the first discharge pipe 201' is pushed backward to close the flow path through which the washing liquid is导通 through the first outflow pipe 133, and the second opening and closing component 16 of the fluid distribution valve is opened. The washing liquid is supplied to the left front headlight through the second outflow pipe 112. Similarly, since the outflow direction of the second discharge pipe 202' is opposite to the flow direction of the fluid in the pressure chamber at this time, the pressure of the washing liquid entering the second discharge pipe 202' is small and cannot open the first opening and closing component of the fluid distribution valve connected to the second discharge pipe 202' to流通, and the fluid supply path at the end of the second discharge pipe 202' is not导通; It should be noted that there may be some inaccuracies in the original text, such as the unclear meaning of "导通" which is directly translated as "导通" in the English translation. It may need to be further adjusted according to the specific context and accurate technical terms.When executing a command relative to the right front light, the control device drives the impeller of the second pump device 20' to rotate in reverse at high speed (rotating in the direction of arrow B in the figure, V>V3). At this time, the washing liquid entering the second discharge pipe 202' of the second pump device 20' reaches a relatively high pressure (e.g., pressure 300 kPa), which pushes the first opening and closing component of the fluid distribution valve connected to the second discharge pipe 202' backward to close the flow path of the washing liquid through the first outlet pipe, and opens the second opening and closing component of the fluid distribution valve. The washing liquid is then supplied to the right front light through the second outlet pipe 112 of the fluid distribution valve. Similarly, the washing liquid entering the first discharge pipe 201' at this time has a lower pressure because it is opposite to the flow direction of the fluid in the pressure chamber, and cannot open the first opening and closing component of the fluid distribution valve connected to the first discharge pipe 201'. The fluid supply path at the end of the first discharge pipe 201' is not open. The above working process clearly demonstrates that the four fluid distribution loops of the second fluid supply system 100' can each supply fluid independently, without any mixing of fluids flowing simultaneously through different outlet pipes.

[0056] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A fluid distribution valve selectively distributes fluid supplied from a fluid supply source to multiple outflow pipes, comprising a valve body (13) having an inflow pipe (134) communicating with the fluid supply source and a first outflow pipe (133), a valve seat (12), and a valve cover (11) having a second outflow pipe (112), wherein the valve seat (12) divides the space fixedly enclosed by the valve cover (11) and the valve body (13) into a fluid inlet chamber (136) communicating with the inflow pipe (134), a first fluid outflow chamber (137) communicating with the first outflow pipe (133), and a second fluid outflow chamber (114) communicating with the second outflow pipe (112), wherein the front end of the valve seat (12) is provided with a third guide hole (124) communicating with the fluid inlet chamber (136) and the first fluid outflow chamber (137), and the rear end center of the valve seat (12) is provided with a fourth guide hole (125) communicating with the fluid inlet chamber (136) and the second fluid outflow chamber (114), characterized in that, Also includes: —The first opening and closing component (14) is provided in the fluid inlet chamber (136). The first opening and closing component (14) is provided with a first elastic element (15) on the rear side to apply an initial opening and closing force F1 to the first opening and closing component (14), so that the first opening and closing component (14) closes the connection between the inlet pipe (134) and the fluid inlet chamber (136) in the reset state. According to the fluid pressure supplied to the inlet pipe (134) by the fluid supply source, the first opening and closing component (14) can be displaced along the axial direction to open the connection between the inlet pipe (134) and the fluid inlet chamber (136), or at the same time close the third guide hole (124). —A second opening and closing assembly (16) is provided in the second fluid outflow chamber (114). A second elastic element (17) is provided on 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 the reset state. According to the fluid pressure supplied by the fluid supply source to the inflow pipe (134), the second opening and closing assembly (16) can be displaced along the axial direction to open the fourth guide hole (125). —The first opening and closing component (14) and the second opening and closing component (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 distribution valve according to claim 1, characterized in that, The second opening and closing assembly (16) includes a second valve diaphragm (161) and a cylindrical valve stem (162) fixedly connected to the second valve diaphragm (161) and serving as a support. The second elastic element (17) is a spring that is sleeved on the valve stem (162) and pushes the second valve diaphragm (161) to press against the rear end of the valve seat (12) to close the fourth guide hole (125).

3. The fluid distribution valve according to claim 2, characterized in that, The first opening and closing assembly (14) includes a first valve diaphragm (141) and a valve plate (142) fixedly connected to the first valve diaphragm (141) for support purposes; the valve plate (142) has a disc-shaped support portion (1421), which is provided with a second guide hole (1422) penetrating its front and rear ends; the first valve diaphragm (141) includes an annular outer peripheral portion (141a) provided on the rear outer edge and a circular plate portion (141b) provided on the front center; the support portion (1421) is located between the outer peripheral portion (141a) and the circular plate portion (141b), the circular plate portion (141b) is used to open and close the flow pipe (134), and the outer peripheral portion (141a) is used to open and close the third guide hole (124).

4. The fluid distribution valve according to claim 3, characterized in that, The first valve diaphragm (141) has a flexible, thin-walled flexible portion (141c) that connects the outer peripheral portion (141a) and the circular plate portion (141b), and the flexible portion (141c) has a first guide hole (141d) at a position corresponding to the second guide hole (1422).

5. The fluid distribution valve according to claim 3 or 4, characterized in that, A guide rod (18) is fixedly provided at the center of the rear side of the valve plate (142), and a blind hole (1621) is provided at the center of the valve stem (162). The rear section of the guide rod (18) can be slidably sleeved in the blind hole (1621).

6. A fluid supply system that selectively supplies fluid to multiple fluid supply paths, characterized in that, include: Pumping devices (20, 20') for discharging the fluid; A fluid distribution valve (10) according to any one of claims 1-5 connected to the pump assembly (20, 20'); and a control device for controlling the fluid discharge pressure of the pump assembly (20, 20').

7. The fluid supply system according to claim 6, characterized in that, The pump device (20) has a single discharge port, namely discharge port (201), which is connected to the inlet pipe (134) of the fluid distribution valve. The control device adjusts the fluid discharge pressure of the discharge port (201) by controlling the rotation speed of the impeller of the pump device (20).

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

9. A washing device, characterized in that, It is equipped with the fluid supply system as described in claim 6 or 7.

10. A car, characterized in that, It is equipped with the fluid supply system as described in any one of claims 6-8.

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