A water valve assembly of a washing apparatus, a washing apparatus, and a control method

Abstract

The application provides a water valve assembly of a washing device, a washing device and a control method. The water valve assembly of the washing device comprises a valve body and a valve core. The valve core is used for connecting / disconnecting a water inlet channel on the valve body. A filter screen is arranged in the valve core. A flushing channel is further arranged on the valve body. When the water inlet channel is disconnected, a filtering surface of the filter screen faces a downstream of the flushing channel. According to the application, the flushing channel corresponding to the filtering surface of the filter screen is arranged on the valve body. Therefore, the reverse flushing of the filter screen can be realized without disassembling the water inlet pipe or other components. The impurities attached to the filter screen can be effectively removed. The convenience of cleaning the filter screen is improved. The water inlet abnormality caused by the filter screen blockage is avoided.

Description

Technical Field

[0001] This invention belongs to the field of washing equipment technology, specifically relating to a water valve assembly, washing equipment, and control method for a washing device. Background Technology

[0002] Currently, with people's continuous pursuit of quality of life, the popularity of various washing equipment such as washing machines and shoe washing machines is increasing, and users are placing higher demands on the intelligence, convenience, and user experience of washing equipment. To ensure the operating efficiency of washing equipment and extend its service life, a filter screen is often installed at the water inlet channel to filter impurities during the water intake process. However, most of the existing water inlet filtration structures are relatively traditional, and the filter screen is prone to clogging due to the accumulation of scale and impurities, affecting the water intake efficiency and even damaging the equipment.

[0003] In actual use, users often need to manually disassemble the water inlet pipe or related components to clean and maintain the filter. This is not only cumbersome and inefficient, but also presents a certain level of difficulty and barrier to entry for non-professional users, which seriously affects the user experience.

[0004] Therefore, how to design a water valve assembly that can automatically clean the filter screen has become a technical problem that urgently needs to be solved by those skilled in the art.

[0005] In view of this, the present invention is proposed. Summary of the Invention

[0006] This invention provides a water valve assembly for a washing device, which aims to solve the problem that cleaning the filter screen at the water inlet of existing washing devices requires disassembly.

[0007] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0008] A water valve assembly for a washing device includes a valve body and a valve core. The valve core is used to connect / disconnect a water inlet channel on the valve body and is provided with a filter screen. The valve body is also provided with a flushing channel. When the water inlet channel is disconnected, the filter surface of the filter screen faces downstream of the flushing channel.

[0009] Furthermore, the flushing channel and the water inlet channel share the same main water inlet, or the water inlet of the flushing channel is set independently of the water inlet of the water inlet channel;

[0010] Preferably, the inlet of the flushing channel is connected to the inlet channel upstream of the valve core, and the inlet of the inlet channel is the main inlet.

[0011] Furthermore, the water inlet channel and the flushing channel are arranged in an intersecting manner, and the valve core can rotate and switch at the intersection of the water inlet channel and the flushing channel; or, the water inlet channel and the flushing channel are arranged in parallel, and the valve core can move and switch between the water inlet channel and the flushing channel.

[0012] Preferably, a spherical chamber is formed at the intersection of the water inlet channel and the flushing channel, and a spherical valve core is rotatably disposed in the spherical chamber.

[0013] Furthermore, the valve core is provided with a water passage; the water passage is straight, and the upstream section and the downstream section of the water inlet channel are coaxially arranged; or, the water passage is L-shaped, the axis of the upstream section of the water inlet channel is perpendicular to the axis of the downstream section of the water inlet channel, and the upstream section of the water inlet channel is equivalent to the upstream section of the flushing channel, and the axis of the downstream section of the flushing channel is perpendicular to the axis of the upstream section of the water inlet channel.

[0014] Furthermore, the inner diameter of the water passage is larger than the inner diameters of the water inlet passage and the flushing passage, respectively.

[0015] Furthermore, the inner diameter of the straight water passage first increases and then decreases along its axial direction, and its axial cross section forms an opposing arc-shaped recess, with the filter screen connected to the inner wall of the recess in the circumferential direction;

[0016] Preferably, the filter screen is located at the center of the axial direction of the recess.

[0017] Furthermore, pressure sensors for detecting water pressure are installed at both the inlet and outlet of the water inlet channel.

[0018] Another object of the present invention is to provide a washing device, wherein a water valve assembly of the washing device is installed;

[0019] Preferably, the valve body is installed on the water inlet pipe and / or drain pipe of the washing equipment.

[0020] Another objective of this invention is to provide a control method for a washing device. When water flows through the inlet channel, the pressure difference between the two sides of the filter screen is obtained, and it is determined whether the filter screen needs to be cleaned based on the pressure difference. When the pressure difference exceeds a set threshold, the control valve core is switched to the position of disconnecting the inlet channel, so that the filter surface of the filter screen faces the downstream of the rinsing channel, and the rinsing operation is performed.

[0021] Furthermore, after rinsing is completed, the pressure difference is re-acquired; if the pressure difference still exceeds the set threshold, the rinsing operation is repeated, with the number of repetitions not exceeding the preset number.

[0022] Preferably, if the pressure difference still exceeds the set threshold after a preset number of rinsing operations, the washing equipment is controlled to stop operating and an alarm signal is issued.

[0023] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0024] 1. This invention provides a flushing channel on the valve body. When the water inlet channel is disconnected, the filter surface of the filter screen faces downstream of the flushing channel. This allows the filter screen to be flushed in reverse through the flushing channel without disassembling the filter screen, effectively removing impurities intercepted by the filter surface of the filter screen, improving the convenience of cleaning the filter screen, and avoiding abnormal water intake caused by filter screen blockage.

[0025] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0026] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0027] Figure 1 This is a cross-sectional schematic diagram of the valve core when it is switched to the position connecting the water inlet channel in an embodiment of the present invention;

[0028] Figure 2 This is a cross-sectional schematic diagram of the valve core when it is switched to the position of disconnecting the water inlet channel in an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the connection structure between the valve core and the drive device in an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the working process of the water valve assembly in an embodiment of the present invention.

[0031] Description of main components in the diagram:

[0032] 1. Valve body; 10. Valve core; 100. Water passage; 101. Filter screen; 102. Recess; 104. Mounting part; 11. Water inlet passage; 110. Main water inlet; 111. Water inlet of water inlet passage; 112. Water outlet of water inlet passage; 1101. Upstream section of water inlet passage; 1102. Downstream section of water inlet passage; 12. Flushing passage; 121. Water inlet of flushing passage; 122. Sewage outlet; 1201. Upstream section of flushing passage; 1202. Downstream section of flushing passage; 13. Drive motor; 130. Drive shaft.

[0033] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0035] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0036] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] like Figures 1 to 4 As shown in this embodiment, a water valve assembly is installed on the water inlet pipe and / or water outlet pipe of the washing equipment. The washing equipment can be a washing machine, or a shoe washing machine, dishwasher, garment care machine, or other equipment with washing functions. For ease of understanding, the following detailed description will be based on the example of the water valve assembly being installed on the water inlet pipe of the washing equipment.

[0038] like Figures 1 to 4 As shown, in this embodiment, the water valve assembly of the washing equipment includes a valve body 1 and a valve core 10. The valve core 10 is disposed inside the valve body 1 and can rotate or translate relative to the valve body 1. The valve body 1 is provided with a water inlet channel 11, and the valve core 10 is used to connect or disconnect the water inlet channel 11 to achieve switching control of the water flow path. A filter screen 101 is provided inside the valve core 10. When the water inlet channel 11 is connected, that is, when the water inlet 111 and the water outlet 112 of the water inlet channel are connected to each other, the water flowing through the valve core 10 will first flow through the filter screen 101. The filter screen 101 intercepts impurities and dirt carried in the water flow, thereby effectively ensuring the cleanliness of the water source entering the washing equipment, which helps to improve the washing quality and extend the service life of the washing equipment.

[0039] like Figure 1 and Figure 2As shown, the valve body 1 is also provided with a flushing channel 12. When the valve core 10 rotates or moves to the point where the water inlet channel 11 is in the off state, the filter screen 101 inside the valve core 10 corresponds to the water flow direction of the flushing channel 12, that is, the filter surface of the filter screen 101 faces the downstream of the flushing channel 12, forming a flow path that can be used for backwashing of the filter screen 101. At this time, the water flow introduced through the flushing channel 12 can be flushed from the back of the filter screen 101 towards the filter surface, removing impurities attached to the filter surface, and discharged through the drain port 122 of the flushing channel 12, avoiding clogging of the filter screen 101 and affecting the smooth flow of water. The cleaning process can be completed automatically without disassembling water pipes or other manual operations, greatly improving cleaning efficiency and ease of use.

[0040] In this embodiment, the "filter surface" refers to the side of the filter screen 101 facing the water inlet 111 of the water inlet channel when the filter screen 101 is connected to the water inlet channel 11. That is, the water-facing side corresponding to the incoming water flow when water is introduced, which is the main surface where impurities are concentrated and attached. Therefore, when the valve core 10 is switched to the state of being connected to the flushing channel 12, the filter surface is turned towards the downstream direction of the flushing channel 12 to achieve effective rinsing and cleaning by reverse water flow.

[0041] In this embodiment, the rinsing channel 12 and the water inlet channel 11 share a common water inlet 110, which simplifies the water circuit connection structure and reduces manufacturing and assembly costs.

[0042] In another embodiment, the inlet of the rinsing channel 12 is set independently, that is, the rinsing channel 12 is not directly connected to the inlet of the water inlet channel 11. An independent water source can be configured for the rinsing channel 12 to enhance the control accuracy and pressure stability of the rinsing water flow and improve the rinsing effect.

[0043] Specifically, in this embodiment, the water inlet end of the rinsing channel 12 is structurally connected to the water inlet end of the water inlet channel 11.

[0044] In another specific embodiment, the water inlet of the flushing channel 12 and the water inlet of the water inlet channel 11 are the same water inlet.

[0045] In this embodiment, the water inlet channel 11 and the flushing channel 12 are arranged to cross each other, and the valve core 10 can rotate and switch at the intersection of the water inlet channel 11 and the flushing channel 12.

[0046] Specifically, in this embodiment, a spherical chamber is formed at the intersection of the water inlet channel 11 and the flushing channel 12. The valve core 10 is spherical and is rotatably installed in the spherical chamber. The size of the valve core 10 housing matches the spherical chamber, ensuring sealing while enabling smooth rotation and switching of the valve core 10, thus preventing water in the flushing channel 12 from entering the downstream section 1102 of the water inlet channel during the flushing state.

[0047] like Figures 1 to 2 As shown, in this embodiment, a main water inlet 110 is provided on the valve body 1, and the water inlet 121 of the flushing channel is connected to the water inlet channel 11 upstream of the valve core 10. The water inlet 111 of the water inlet channel is the main water inlet 110.

[0048] Preferably, in this embodiment, the inlet 121 of the rinsing channel is located on the upper side of the inlet channel 11, and the axis of the inlet 121 of the rinsing channel is perpendicular to the axis of the inlet 111 of the inlet channel.

[0049] In a further preferred embodiment, the flushing channel 12 extends vertically upward from the water inlet channel 11 for a certain distance, then bends downward at 90 degrees and extends horizontally. After extending horizontally, it bends again at 90 degrees and extends vertically downward until it intersects with the water inlet channel 11. After intersecting with the water inlet channel 11, it continues to extend vertically and bends downward at 90 degrees again to extend horizontally to the drain outlet 122, forming a flushing water path. Furthermore, the drain outlet 122 and the water inlet 111 of the water inlet channel are located on the same side of the valve body 1, facilitating unified connection and subsequent maintenance.

[0050] More specifically, in this embodiment, the water inlet channel 11 is arranged horizontally, and the upstream section 1101 and the downstream section 1102 of the water inlet channel located on both sides of the valve core 10 are arranged coaxially to achieve a smooth transition of water flow; at the same time, the upstream section of the flushing channel 12 located on both sides of the valve body 1 is arranged above the water inlet channel 11, and the downstream section 1202 of the flushing channel is arranged below the water inlet channel 11, so that the flushing water can directly flush the filter screen 101 under the action of gravity, which is beneficial to improve the impurity flushing effect and improve the cleaning efficiency.

[0051] Furthermore, the valve body 1 can be installed in different directions in actual use: when the water inlet channel 11 is set horizontally, it is equivalent to the valve body 1 being installed on the water inlet pipe in the first position; when the water inlet channel 11 is set vertically, the valve body 1 is installed on the water inlet pipe in the second position, preferably with the water inlet 111 of the water inlet channel facing upwards.

[0052] In another optional embodiment, the water inlet channel 11 and the flushing channel 12 are arranged side by side as two independent channels, parallel to each other and not intersecting. The valve core 10 can be translated and slide between the water inlet channel 11 and the flushing channel 12 to realize the diversion and control switching of the water path.

[0053] In this embodiment, the valve core 10 is provided with a water passage 100. The water passage 100 is used to connect or disconnect the water inlet 111 and the water outlet 112 of the water inlet channel when the valve core 10 switches to different positions, or to connect or disconnect the water inlet and the drain outlet 122 of the flushing channel 12, so as to complete the normal water supply or reverse flushing function.

[0054] Specifically, in this embodiment, when the upstream section 1101 and the downstream section 1102 of the water inlet channel are coaxially arranged on both sides of the valve core 10, the water passage 100 is set as a straight line.

[0055] More specifically, in this embodiment, the inner diameter of the straight water passage 100 is set to gradually increase and then gradually decrease along its axial direction. The axial cross section of the water passage 100 forms an arc-shaped recess 102 with opposite sides. The filter screen 101 is circumferentially connected to the inner wall of the recess 102, thereby reducing the impact force on the filter screen 101 mounting part 104 without affecting the smooth flow of water, and enhancing the stability and durability of the filter screen 101 installation.

[0056] Preferably, in this embodiment, the filter 101 is disposed at the middle position in the axial direction of the recess 102.

[0057] In another embodiment, the water passage 100 has an L-shaped structure, and the axis of the upstream section 1101 of the water inlet channel is perpendicular to the axis of the downstream section 1102 of the water inlet channel. In this scheme, the upstream section 1101 of the water inlet channel also serves as the upstream section 1201 of the flushing channel, which can reduce the number of components and simplify manufacturing and assembly.

[0058] In this embodiment, the inner diameter of the water passage 100 is larger than the inner diameter of the water inlet passage 11 and the flushing passage 12 to accommodate rotational errors that may occur during rotation or movement switching, prevent water flow from being obstructed, and thus ensure that the entire water system can maintain good flow performance under different working conditions.

[0059] like Figure 3 As shown, in this embodiment, a driving device is provided on the valve body 1. The driving device is used to drive the valve core 10 to switch between different positions to control the connection state between the water inlet channel 11 and the flushing channel 12, thereby realizing the automatic cleaning function of the filter screen 101.

[0060] Specifically, in this embodiment, the driving device includes a drive motor 13, which drives the valve core 10 in one direction, that is, the two surfaces on the filter screen 101 alternately serve as the filtering surface. When the water passage 100 of the valve core 10 is connected to the water inlet channel 11, the filtering surface of the filter screen 101 intercepts impurities. When the valve core 10 rotates and switches to the point where its water passage 100 is connected to the flushing channel 12, the filtering surface on the filter screen 101 carrying impurities always faces the downstream of the flushing channel 12. After water enters the flushing channel 12, water flows through the filter screen 101 to backwash the filter screen 101, washing away the impurities on the filter screen 101 and realizing automatic cleaning of the filter screen 101.

[0061] Specifically, in this embodiment, the driving device includes a drive motor 13, which drives the valve core 10 to rotate via a drive shaft 130. The drive motor 13 drives the valve core 10 to rotate in one direction, thereby achieving switching between different working positions.

[0062] When a blockage is detected in the filter screen 101, the drive motor 13 drives the valve core 10 to rotate to the flushing position, connecting the water passage 100 with the flushing passage 12, while simultaneously closing the water inlet passage 11. At this time, flushing water flows in through the flushing passage 12, passes through the filter surface of the filter screen 101, and exits from the drain port 122, completing the reverse flushing of the filter screen 101. Because the valve core 10 always rotates in a single direction, the two filter surfaces of the filter screen 101 are used sequentially as filter surfaces, improving the service life and cleaning efficiency of the filter screen 101.

[0063] Preferably, in this embodiment, the drive motor 13 is a stepper motor, which has the advantages of fast response, accurate positioning and flexible control, and can accurately control the rotation angle and switching time of the valve core 10.

[0064] Furthermore, in order to improve the impurity removal capacity and filtration area, the filter surface of the filter screen 101 is preferably concave on the side away from the water flow direction, with an arc-shaped structure. This not only increases the filtration area of ​​the filter screen 101 and reduces the cleaning frequency, but also expands the impurity holding space inside the valve body 1.

[0065] In another specific embodiment, the drive motor 13 drives the valve core 10 to reciprocate, meaning the filter surface of the filter screen 101 is always one side of the filter screen 101. When the valve core 10 rotates to the flushing state, the filter surface of the filter screen 101 rotates to face downstream of the flushing channel 12, and impurities are removed under the action of the flushing water. After flushing, the valve core 10 rotates in the opposite direction to reset to the water inlet state, and the filter surface of the filter screen 101 remains unchanged, which facilitates the judgment and management of the control system.

[0066] In another possible embodiment, the drive device adopts a manual structure, including a rotating shaft set on the valve core 10 and a handle connected to the outside of the rotating shaft. The valve core 10 is switched by manually rotating the handle, which is suitable for equipment with low automation requirements or strict cost control.

[0067] like Figure 3 As shown, in this embodiment, the valve core 10 housing is provided with an outwardly protruding mounting portion 104, which is used to mount the drive motor 13.

[0068] Specifically, in this embodiment, the mounting part 104 is a hollow columnar structure, and the drive shaft 130 is inserted into the mounting part 104 to switch the valve core 10 by rotating it.

[0069] More specifically, in this embodiment, a bushing is fitted on the drive shaft 130, and a limiting structure extending radially is provided between the inner wall of the bushing and the drive shaft 130. The limiting structure can be set on the inner circumference of the bushing or the outer circumference of the drive shaft 130, which can effectively prevent the drive shaft 130 from spinning or slipping during rotation, thereby improving the stability and reliability of the driving process.

[0070] Preferably, the inner peripheral wall of the mounting part 104 matches the outer shape of the bushing. The bushing may be gear-shaped or other non-circular structures, such as triangular, square, or prismatic, to further enhance the connection reliability between the drive shaft 130 and the valve core 10.

[0071] like Figure 4 As shown in this embodiment, when water flows through the water inlet channel 11, the pressure difference between the two sides of the filter screen 101 is obtained, and the filter screen 101 is cleaned based on the pressure difference.

[0072] Specifically, in this embodiment, the inlet 111 and outlet 112 of the water inlet channel are respectively equipped with pressure sensors for real-time water pressure detection. A first pressure sensor is set on one side of the inlet 111 of the water inlet channel, and a second pressure sensor is set on one side of the outlet 112 of the water inlet channel. These sensors are used to collect the water pressure values ​​of the water inlet channel 11 before water inlet and after water outlet, and transmit the corresponding signals to the control circuit board (PCB) in real time for logic processing. The control system calculates the pressure difference to obtain ΔP, which is used to determine the clogging status of the filter screen 101.

[0073] Specifically, in this embodiment, the system first obtains the pressure value P1 at the inlet 111 of the water inlet channel and the pressure value P2 at the outlet 112 of the water inlet channel, and calculates the pressure difference P1-P2=ΔP. Based on the pressure difference, it determines whether the filter 101 needs to be cleaned.

[0074] When ΔP is within the set threshold range, it indicates that the filter screen 101 is not significantly blocked, the water flows smoothly, the system maintains normal operation, and the valve core switches to normal water intake state (the water intake channel is connected, and the flushing channel is disconnected). When ΔP exceeds the set threshold, it indicates that there are many impurities deposited on the filter screen 101, which may affect the smooth flow of subsequent water. At this time, the control system controls the drive device to switch the valve core 10 to the position of disconnecting the water intake channel 11, and at the same time, the flushing channel 12 opens, and the filter surface of the filter screen 101 faces the downstream of the flushing channel 12 to perform the flushing operation.

[0075] After the flushing state is maintained for a set time (e.g., 10 seconds), the control system controls the valve core 10 to rotate back to the position communicating with the water inlet channel 11, allowing water to flow through the filter screen 101 again. At this time, the first pressure sensor and the second pressure sensor respectively obtain the water pressure values ​​at the water inlet 111 and the water outlet 112 of the water inlet channel, and the control circuit board calculates the updated pressure difference ΔP. If ΔP still exceeds the set threshold,

[0076] If ΔP still exceeds the set threshold, it indicates that the filter 101 is not effectively cleared of blockage, and the system will repeat the rinsing process. The system has an upper limit on the number of rinsing cycles allowed, preferably three times; if ΔP still does not return to the normal range after three consecutive rinsing cycles, the washing equipment will stop operating and an alarm signal will be issued to prompt the user to perform maintenance.

[0077] When the pressure difference ΔP recovers to below the set threshold after the rinsing operation, the control system automatically determines that the filter 101 has been cleaned. At this time, the control stepper motor drives the valve core 10 to rotate to the position where the water inlet channel 11 is connected, closes the rinsing channel 12, and opens the water inlet channel 11, so that the washing equipment resumes the normal water inlet process.

[0078] In another possible embodiment, a third pressure sensor is added at the downstream section 1202 of the flushing channel or at the drain outlet 122 to collect the discharge pressure signal of the flushing water flow during the flushing operation. The pressure value at the inlet 111 of the inlet channel is P1, and combined with the pressure value P3 detected by the third pressure sensor, the pressure difference ΔP′ between P1 and P3 can be obtained during the flushing process. The control system compares ΔP′ with another new set threshold to determine whether the filter screen has been effectively flushed clean.

[0079] When ΔP′ falls below the new set threshold, the control system determines that the rinsing effect is qualified, and then controls the stepper motor to drive the valve core to reset to the open state of the water inlet channel 11, and the washing equipment resumes normal water intake operation; if ΔP′ still exceeds the threshold, the rinsing operation is repeated until the set upper limit of the number of times is met or the filter screen 101 is judged to be severely blocked and an alarm is issued.

[0080] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. The implementation schemes in the above embodiments can be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A water valve assembly for a washing device, comprising a valve body (1) and a valve core (10), the valve core (10) being used to connect / disconnect a water inlet channel (11) on the valve body (1), and the valve core (10) being provided with a filter screen (101); characterized in that, The valve body (1) is also provided with a flushing channel (12). When the water inlet channel (11) is disconnected, the filter surface of the filter screen (101) faces the downstream of the flushing channel (12).

2. The water valve assembly of the washing equipment according to claim 1, characterized in that, The flushing channel (12) and the water inlet channel (11) share the same main water inlet (110), or the water inlet (121) of the flushing channel is set independently of the water inlet (111) of the water inlet channel; Preferably, the inlet (121) of the flushing channel is connected to the inlet channel (11) upstream of the valve core (10), and the inlet (111) of the inlet channel is the main inlet (110).

3. The water valve assembly of the washing equipment according to claim 2, characterized in that, The water inlet channel (11) and the flushing channel (12) are arranged to cross each other, and the valve core (10) can rotate and switch at the intersection of the water inlet channel (11) and the flushing channel (12); or, the water inlet channel (11) and the flushing channel (12) are arranged side by side, and the valve core (10) can move and switch between the water inlet channel (11) and the flushing channel (12). Preferably, a spherical chamber is formed at the intersection of the water inlet channel (11) and the flushing channel (12), and a spherical valve core (10) is rotatably disposed in the spherical chamber.

4. The water valve assembly of the washing equipment according to claim 3, characterized in that, The valve core (10) is provided with a water passage (100); the water passage (100) is straight, and the upstream section (1101) and the downstream section (1102) of the water inlet channel are coaxially arranged; Alternatively, the water passage (100) is L-shaped, with the axis of the upstream section (1101) of the water inlet passage perpendicular to the axis of the downstream section (1102) of the water inlet passage, and the upstream section (1101) of the water inlet passage is equivalent to the upstream section of the flushing passage (12), and the axis of the downstream section (1202) of the flushing passage is perpendicular to the axis of the upstream section (1101) of the water inlet passage.

5. The water valve assembly of the washing equipment according to claim 4, characterized in that, The inner diameter of the water passage (100) is larger than the inner diameter of the water inlet passage (11) and the flushing passage (12), respectively.

6. The water valve assembly of the washing equipment according to claim 5, characterized in that, The inner diameter of the straight water passage (100) first increases and then decreases along its axial direction, and its axial cross section forms an arc-shaped recess (102) with opposite sides. The filter screen (101) is connected to the inner wall of the recess (102) in the circumferential direction. Preferably, the filter (101) is located at the center of the recess (102) in the axial direction.

7. The water valve assembly of the washing equipment according to claim 6, characterized in that, Pressure sensors for detecting water pressure are respectively installed at the inlet (111) and outlet (112) of the water inlet channel.

8. A washing device, characterized in that, A water valve assembly is installed in the washing equipment according to any one of claims 1 to 7; Preferably, the valve body (1) is installed on the water inlet pipe and / or drain pipe of the washing equipment.

9. A control method for the washing equipment according to claim 8, characterized in that, When water flows through the inlet channel (11), the pressure difference between the two sides of the filter screen (101) is obtained, and the filter screen (101) is cleaned based on the pressure difference. When the pressure difference exceeds the set threshold, the control valve core (10) switches to the position of disconnecting the water inlet channel (11), so that the filter surface of the filter screen (101) faces the downstream of the flushing channel (12) and performs the flushing operation.

10. The control method for the washing equipment according to claim 9, characterized in that, After rinsing is completed, the pressure difference is re-acquired; if the pressure difference still exceeds the set threshold, the rinsing operation is repeated, and the number of repetitions does not exceed the preset number. Preferably, if the pressure difference still exceeds the set threshold after a preset number of rinsing operations, the washing equipment is controlled to stop operating and an alarm signal is issued.

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