A water dividing valve for a dishwasher

Abstract

The utility model discloses a kind of water distribution valves for dish washer, including base, rotating plugging member, adjusting assembly and correction device, rotating plugging member is movably installed on base, and is supported by base, so that it can rotate around its circumference, to realize the opening or closing of water inlet. Adjusting assembly includes rotary drive device and transmission reduction mechanism, both are installed and supported on base. Rotary drive device is connected with rotating plugging member by transmission reduction mechanism;Wherein, transmission reduction mechanism is equipped with last stage output gear, and the gear directly drives rotating plugging member to rotate with it. Correction device includes zero-point correction limiting portion and angle detection sensor: zero-point correction limiting portion is installed on last stage output gear, and rotates with it;Angle detection sensor is fixed to base, and its detection head is located on the rotary path of zero-point correction limiting portion. By the utility model, the impact force received by zero-point correction protrusion is reduced.

Description

Technical Field

[0001] This utility model relates to the field of dishwasher technology, and in particular to a water distribution valve for a dishwasher. Background Technology

[0002] As a core component for precise switching between multiple water channels, the dishwasher's water distribution valve's transmission and positioning accuracy directly determines the washing effect and operational reliability. Traditional gear transmissions, due to meshing clearances and wear, are prone to causing angular deviations in valve core rotation, leading to problems such as water flow misalignment.

[0003] To address this, existing technologies typically incorporate a correction device on the intermediate gear of the transmission chain, which engages with a zero-point correction protrusion on the gear to perform position correction. However, this design has significant limitations: firstly, the correction action occurs in the middle of the transmission chain, and the transmission error in the final stage leading to the valve core cannot be effectively eliminated, thus limiting the final correction accuracy; secondly, the intermediate gear operates at high speeds and is subjected to large forces, and frequent correction impacts can easily exacerbate its wear and generate operating noise.

[0004] Therefore, this utility model provides a water distribution valve for a dishwasher to reduce the impact force on the zero-point correction protrusion, thereby improving the correction accuracy and reducing the wear of the zero-point correction protrusion. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide a water distribution valve for a dishwasher, which can reduce the impact force on the zero-point correction protrusion, thereby improving the correction accuracy and reducing the wear of the zero-point correction protrusion.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A water distribution valve for a dishwasher includes:

[0008] Base;

[0009] A rotating sealing element is movably mounted on and supported by the base, so that the rotating sealing element can rotate about its own circumference relative to the base. The rotating sealing element is used to open or close the water inlet.

[0010] An adjustment assembly includes a rotary drive device and a transmission reduction mechanism. The rotary drive device is mounted on and supported by the base. The rotary drive device is connected to the rotating sealing member via the transmission reduction mechanism. The transmission reduction mechanism includes a final output gear, which is connected to the rotating sealing member and drives the rotating sealing member to rotate following the final output gear.

[0011] The calibration device includes a zero-point calibration limit part and an angle detection sensor. The zero-point calibration limit part is installed on the final stage output gear to rotate with the final stage output gear. The angle detection sensor is installed on the base, and the detection head of the angle detection sensor is installed on the rotation path of the zero-point calibration limit part.

[0012] Furthermore, the final stage output gear includes a socket extending along the axial direction of the final stage output gear. One end of the socket is movably mounted on and supported by the base. The final stage output gear and the socket are coaxially arranged. The final stage output gear is arranged around the outer periphery of the socket and supported by the socket, so that the socket can rotate with the final stage output gear relative to the base about the axis of the socket.

[0013] Furthermore, the zero-point correction limiting part is a zero-point correction protrusion.

[0014] Furthermore, the zero-point correction protrusion is mounted on the socket and extends radially from the inside to the outside along the socket.

[0015] Furthermore, the base is provided with a positioning support column, the socket is movably sleeved on the positioning support column, and the socket can rotate relative to the positioning support column about the axis of the positioning support column, and the socket is spaced apart from the base.

[0016] Furthermore, the transmission reduction mechanism also includes a power input gear, which is connected to the rotary drive device and meshes with the final stage output gear. The number of teeth on the power input gear is less than the number of teeth on the final stage output gear.

[0017] Furthermore, the base is provided with an annular clearance groove, the power input gear is provided with a central transmission tube, the central transmission tube extends along the axial direction of the power input gear, the central transmission tube is inserted into the annular clearance groove, the edge of the annular clearance groove is provided with annular protrusions, the power input gear is supported by the annular protrusions, and the power input gear is spaced apart from the base.

[0018] Furthermore, the rotary drive device includes a motor and a transmission rod, the motor being drivenly connected to the transmission rod, the transmission rod extending along the axial direction of the power input gear and being drivenly connected to the central transmission tube, so that the power input gear rotates following the transmission rod.

[0019] Furthermore, the base is a first protective shell, and the water distribution valve for a dishwasher also includes a second protective shell. The first protective shell and the second protective shell together form a protective cavity, and the power input gear and the final stage output gear are both located in the protective cavity. The second protective shell is provided with a clearance through hole, which communicates with the protective cavity. The clearance through hole and the central transmission tube are coaxially arranged, and the transmission rod passes through the clearance through hole.

[0020] Furthermore, the second protective shell is disposed at a distance from the final stage output gear.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] 1. Based on the rotating sealing component being movably installed on the base and supported by the base, the rotating sealing component can rotate around its own circumference relative to the base. In this embodiment, the rotating sealing component is supported by the base, which ensures that the rotating sealing component can maintain a stable axis of rotation when subjected to water pressure, avoiding uneven wear and sealing failure, thereby providing a fundamental guarantee for achieving accurate and reliable opening or closing of specific water inlets.

[0023] 2. The rotary drive device is mounted on and supported by the base. The rotary drive device is connected to the rotating sealing component through a transmission reduction mechanism. This design determines the power transmission path of this embodiment. The drive device and the transmission mechanism are both integrated into the base, forming a rigid power assembly. This reduces the positional changes caused by vibration, improves the overall stability of the system, and through the transmission reduction mechanism, the high speed and low torque output of the rotary drive device is converted into the low speed and high torque output required by the rotating sealing component, ensuring sufficient torque to reliably switch the water path.

[0024] 3. The transmission reduction mechanism includes a final-stage output gear, which is connected to the rotating sealing component and drives the rotating sealing component to rotate with the final-stage output gear. This structure establishes a reference point for position feedback. Because the final-stage output gear and the rotating sealing component are directly driven, their motion synchronization is the highest, with almost no backlash. The position information obtained here most accurately and directly reflects the absolute position of the valve core, providing a basic support structure for the installation of the calibration device.

[0025] 4. The zero-point correction limiting part is installed on the final stage output gear to rotate with it; the angle detection sensor is installed on the base, and the detection head of the angle detection sensor is installed on the rotation path of the zero-point correction limiting part. This design is the core of this utility model, directly setting the correction reference on the final stage output gear that drives the valve core (rotating sealing component), realizing end-to-end direct position calibration. This eliminates the cumulative errors caused by the meshing clearance, assembly errors, and wear of all gear pairs from the intermediate correction point to the valve core (rotating sealing component), improving the correction accuracy. More importantly, after passing through the reduction mechanism, the rotational speed of the final stage output gear is much lower than that of the intermediate gear. The linear velocity of the zero-point correction limiting part installed on it when passing through the angle detection sensor is greatly reduced, and the resulting mechanical impact force is significantly reduced. This reduces the wear of the zero-point correction limiting part and the angle detection sensor, extending the service life and reliability of the calibration device. The low-speed, low-impact calibration process naturally generates less mechanical collision noise, improving the user experience of the product. Moreover, the combination of high-precision positioning and long-life mechanical structure ensures that the water distribution valve can maintain its initial accuracy and stability even after long-term and frequent use, resulting in a significant improvement in overall operational reliability. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a water distribution valve for a dishwasher according to the present invention;

[0027] Figure 2 for Figure 1 The cross-sectional view shown;

[0028] Figure 3 for Figure 2 The enlarged view shown at point A in the middle;

[0029] Figure 4 This is a schematic diagram of the base structure of this utility model;

[0030] Figure 5 for Figure 1 Another structural diagram from which the base structure is omitted.

[0031] In the diagram: 1. Base; 11. Positioning support column; 12. Annular clearance groove; 13. Annular protrusion; 2. Rotary sealing component; 3. Adjustment assembly; 31. Rotary drive device; 311. Motor; 312. Transmission rod; 32. Transmission reduction mechanism; 321. Final stage output gear; 3211. Sleeve seat; 322. Power input gear; 3221. Central transmission tube; 4. Correction device; 41. Correction limit part; 42. Angle detection sensor; 5. Second protective shell; 51. Clearance through hole. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0033] It should be noted that when an element is described as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is described as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] See Figures 1-5 A preferred embodiment of the present invention provides a water distribution valve for a dishwasher, comprising a base 1, a rotating sealing element 2, an adjusting assembly 3, and a calibration device 4. The rotating sealing element 2 is movably mounted on and supported by the base 1, allowing it to rotate circumferentially relative to the base 1. The rotating sealing element 2 is used to open or close the water inlet. The adjusting assembly 3 includes a rotary drive device 31 and a transmission reduction mechanism 32. The rotary drive device 31 is mounted on and supported by the base 1. The rotary drive device 31 is connected to the rotating sealing element 4 via the transmission reduction mechanism 32. The plug 2 is connected to the transmission mechanism; the transmission reduction mechanism 32 includes a final output gear 321, which is connected to the rotating plug 2 and drives the rotating plug 2 to rotate with the final output gear 321; the calibration device 4 includes a zero-point calibration limit part 41 and an angle detection sensor 42. The zero-point calibration limit part 41 is installed on the final output gear 321 to rotate with the final output gear 321; the angle detection sensor 42 is installed on the base 1, and the detection head of the angle detection sensor 42 is installed on the rotation path of the zero-point calibration limit part 41.

[0036] The working principle of this utility model is as follows: The rotary drive device 31 transmits power to the final output gear 321 through the transmission reduction mechanism 32. The final output gear 321 drives the rotating sealing member 2 to rotate around its circumference, thereby achieving precise opening or blocking of each water inlet. During this process, the zero-point correction limit part 41, which is fixedly installed on the final output gear 321, rotates synchronously. When it passes the detection head of the angle detection sensor 42 set on the base 1, the sensor will detect its signal and feed back this position as the zero-point reference position to the control system. Since the zero-point correction link is set in the final transmission link that directly drives the rotating sealing member 2, the correction deviation caused by the error of the intermediate transmission chain in the traditional design is effectively avoided, thereby improving the angle control accuracy of the valve core. At the same time, the relatively low speed of the final gear also reduces the impact on the correction protrusion, reducing wear and operating noise.

[0037] Obviously, since the rotating sealing element 2 is movably installed on the base 1 and supported by the base 1, the rotating sealing element 2 can rotate around its own circumference relative to the base 1. In this embodiment, the rotating sealing element 2 is supported by the base 1, which ensures that the rotating sealing element 2 can maintain a stable axis of rotation when subjected to water pressure, avoiding uneven wear and sealing failure, thus providing a fundamental guarantee for achieving accurate and reliable opening or closing of specific water inlets.

[0038] The rotary drive device 31 is mounted on and supported by the base 1. The rotary drive device 31 is connected to the rotating sealing member 2 through the transmission reduction mechanism 32. This design determines the power transmission path of this embodiment. The drive device and the transmission mechanism are both integrated into the base 1, forming a rigid power assembly. This reduces the positional changes caused by vibration and improves the overall stability of the system. Furthermore, through the transmission reduction mechanism 32, the high speed and low torque output of the rotary drive device 31 is converted into the low speed and high torque output required by the rotating sealing member 2, ensuring that there is sufficient torque to reliably switch the water path.

[0039] The transmission reduction mechanism 32 includes a final-stage output gear 321, which is connected to the rotating sealing member 2 and drives the rotating sealing member 2 to rotate following the final-stage output gear 321. This structure establishes a reference point for position feedback. Since the final-stage output gear 321 and the rotating sealing member 2 are directly driven, their motion synchronization is the highest, with almost no backlash. The position information obtained here most accurately and directly reflects the absolute position of the valve core, providing a basic support structure for the installation of the calibration device 4.

[0040] The zero-point correction limiting part 41 is mounted on the final stage output gear 321 to rotate with it; the angle detection sensor 42 is mounted on the base 1, and its detection head is mounted on the rotation path of the zero-point correction limiting part 41. This design is the core of this utility model, directly setting the correction reference on the final stage output gear 321 that drives the valve core (rotating sealing member 2), realizing end-to-end direct position calibration. This eliminates the cumulative error caused by the meshing clearance, assembly error, and wear of all gear pairs from the intermediate correction point to the valve core (rotating sealing member 2), improving the correction accuracy. More importantly, after passing through the reduction mechanism, the rotational speed of the final stage output gear 321 is much lower than that of the intermediate gear. The linear velocity of the zero-point correction limiting part 41 mounted on it when passing through the angle detection sensor 42 is greatly reduced, and the resulting mechanical impact force is significantly reduced. This reduces the wear of the zero-point correction limiting part 41 and the angle detection sensor 42, extending the service life and reliability of the calibration device 4. The low-speed, low-impact calibration process naturally generates less mechanical collision noise, improving the user experience of the product. Moreover, the combination of high-precision positioning and long-life mechanical structure ensures that the water distribution valve can maintain its initial accuracy and stability even after long-term and frequent use, resulting in a significant improvement in overall operational reliability.

[0041] It is worth noting that the angle detection sensor 42 and the rotation drive device 31 mentioned in this embodiment should be specifically selected based on the actual application scenario and cost considerations to ensure the practicality and economy of the solution. The performance parameters of these key components directly determine the control accuracy and operational reliability of the water distribution valve.

[0042] Taking the angle detection sensor 42 as an example, in applications requiring high-precision positioning, photoelectric or Hall effect sensors can be selected. Specifically, a magnet can be installed at the shaft end of the final output gear 321 as a zero-point correction limit part 41, and a multi-pole magnetic ring Hall sensor can be fixed on the base 1 at the corresponding position. When the gear rotates, the Hall sensor can accurately calculate the angle and position rotated by detecting changes in the magnetic field; of course, the angle sensor can also use a micro switch, which has a simple structure, extremely low cost, reliable drive, and strong anti-electrical interference capability. For the rotary drive device 31, considering the small internal space and humid environment of the dishwasher, a structure of micro DC geared motor 311 combined with a planetary gearbox is preferred. This combination can provide sufficient output torque and effectively control noise, while the plastic gear also has the advantages of corrosion resistance and self-lubrication, making it suitable for long-term use in the high-temperature and high-humidity environment of the dishwasher.

[0043] More preferably, the final stage output gear 321 includes a socket 3211, which extends along the axial direction of the final stage output gear 321. One end of the socket 3211 is movably mounted on and supported by the base 1. The final stage output gear 321 and the socket 3211 are coaxially arranged. The final stage output gear 321 is arranged around the outer periphery of the socket 3211 and supported by the socket 3211, so that the socket 3211 can rotate with the final stage output gear 321 relative to the base 1 around the axis of the socket 3211. The socket 3211 serves as a precise axial positioning reference, effectively constraining the radial and axial runout of the final stage output gear 321. This ensures the motion accuracy and stability of the gear transmission, especially the rotating sealing element 2 it drives, directly improving the position control accuracy of the valve core (rotating sealing element 2) from a mechanical structure perspective. This support method evenly transmits the rotational load of the gear to the base 1 through the socket 3211, improving the force distribution, reducing local wear and operating noise, and enhancing the mechanical life and operational stability of the entire transmission assembly. Finally, this optimized support structure provides a detection platform with less vibration and a more stable reference for the zero-point correction limit part 41 installed on the final stage output gear 321, further consolidating and improving the overall correction accuracy and long-term reliability of the system.

[0044] More preferably, the zero-point correction limiting part 41 is a zero-point correction protrusion. Its prominent physical structure provides a clear mechanical trigger signal for the detection head of the angle detection sensor 42. When the zero-point correction protrusion rotates with the final stage output gear 321 and passes the detection head, it can generate a steep and clear electrical signal jump through direct contact or close-range obstruction / induction. Moreover, the protrusion structure is simple and easy to manufacture as a whole during gear injection molding, which not only reduces production costs and avoids assembly errors, but its robust mechanical properties are also superior to grooves that easily accumulate dirt or reflective surfaces that are easily contaminated. It can better adapt to the harsh environment of high temperature and high humidity inside the dishwasher, ensuring the long-term stability and durability of the zero-point correction function of the water valve during long-term use. In addition to providing a precise zero-point signal, the zero-point correction protrusion also functions as a mechanical limiter. When the final output gear 321 rotates abnormally beyond the preset range due to control abnormalities or drive failures in the water distribution valve, the protrusion will interfere with the angle detection sensor 42 fixed on the base 1 or its adjacent mechanical structure, preventing the gear from rotating further through mechanical collision. This effectively prevents the transmission chain from being damaged due to excessive torsion, and also avoids the rotating sealing component 2 from opening the wrong water path or even damaging the sealing interface due to uncontrolled angle. Thus, it provides a crucial last mechanical protection for the entire water distribution valve system, improving the reliability and safety of the product.

[0045] More preferably, the zero-point correction protrusion is mounted on the socket 3211 and extends radially from the inside to the outside along the socket 3211. This design allows the root of the zero-point correction protrusion to be directly supported by the socket 3211, thereby improving its structural strength and impact resistance. This layout allows the zero-point correction protrusion to have a greater linear velocity when rotating, providing a steeper and clearer trigger signal edge for the angle detection sensor 42, effectively improving the accuracy and reliability of position detection. At the same time, the zero-point correction protrusion is located near the rotation axis of the transmission system, and its circumferential radius of motion trajectory is small. This not only reduces the rotational inertia of the zero-point correction protrusion itself, making it more responsive during start-up, shutdown, and correction, but also effectively reduces potential vibrations caused by high-speed rotation, further laying the foundation for the stable operation and precise positioning of the entire water distribution valve.

[0046] More preferably, the base 1 is provided with a positioning support column 11, and the socket 3211 is movably sleeved on the positioning support column 11, allowing the socket 3211 to rotate relative to the positioning support column 11 around its axis. The socket 3211 is spaced apart from the base 1. This design, by setting the positioning support column 11, provides a high-precision rotation axis reference for the socket 3211, enabling the socket 3211 and its coaxial final-stage output gear 321 to rotate stably around a fixed axis, reducing radial runout and end-face oscillation. At the same time, the spaced arrangement of the socket 3211 and the base 1 forms a suspended support structure, which not only effectively avoids direct friction between the end face of the socket 3211 and the base 1, thus preventing wear and noise, but also provides tolerance for possible minor assembly errors, ensuring the coaxiality, stability, and reliability of the transmission components during long-term operation, thereby improving the angle control accuracy of the valve core and the service life of the entire water distribution valve.

[0047] More preferably, the transmission reduction mechanism 32 also includes a power input gear 322, which is connected to the rotary drive device 31 and meshes with the final stage output gear 321. The number of teeth of the power input gear 322 is less than the number of teeth of the final stage output gear 321. The meshing method of the power input gear 322 (small gear) driving the final output gear 321 (large gear) constitutes a single-stage reduction mechanism, which can effectively reduce the speed and amplify the output torque, ensuring that the rotating sealing component 2 obtains a sufficiently large torque to reliably open or close the water inlet. Secondly, the difference in the number of teeth directly determines the reduction ratio, which not only allows the system to use a standard micro motor 311 with a higher speed and lower cost, but also optimizes the overall power matching of the machine and improves energy efficiency through the reduction and torque amplification effect. This simple and efficient gear transmission layout, combined with the scheme of setting the correction device 4 on the low-speed heavy-load final output gear 321, together ensures sufficient output power while creating low-speed and stable detection conditions for high-precision position correction, thus optimizing the performance and cost of the water distribution valve as a whole.

[0048] More preferably, the base 1 is provided with an annular clearance groove 12, and the power input gear 322 is provided with a central transmission tube 3221. The central transmission tube 3221 extends along the axial direction of the power input gear 322 and is inserted into the annular clearance groove 12. The edge of the annular clearance groove 12 is provided with annular protrusions 13. The power input gear 322 is supported by the annular protrusions 13, and the power input gear 322 is spaced apart from the base 1. The annular protrusions 13 provide stable axial support for the power input gear 322, ensuring that it is spaced apart from the base 1, effectively avoiding direct friction between the gear end face and the base 1, thereby reducing wear and operating noise. The cooperation between the annular clearance groove 12 and the central transmission tube 3221 provides precise radial positioning for the rotation of the power input gear 322, constrains its running trajectory, and improves meshing stability.

[0049] More preferably, the rotary drive device 31 includes a motor 311 and a transmission rod 312. The motor 311 is connected to the transmission rod 312, which extends along the axis of the power input gear 322 and is connected to the central transmission tube 3221, so that the power input gear 322 rotates with the transmission rod 312. In this embodiment, the transmission rod 312 extends along the axis of the power input gear 322 and is directly connected to the central transmission tube 3221, realizing the unbiased transmission of the torque of the motor 311. This avoids efficiency loss and angular error caused by multi-stage transmission or misaligned connection, and ensures the synchronization of the speed of the power input gear 322 with the speed of the motor 311. This coaxial direct drive structure greatly optimizes the space utilization, making the entire drive assembly more compact. It is particularly suitable for installation in environments with limited internal space in dishwashers, which not only improves transmission efficiency and position control accuracy, but also enhances the adaptability of the water distribution valve to different installation environments.

[0050] More preferably, the base 1 is the first protective shell, and the water distribution valve for the dishwasher also includes a second protective shell 5. The first protective shell and the second protective shell 5 together enclose a protective cavity, and the power input gear 322 and the final stage output gear 321 are both located in the protective cavity. The second protective shell 5 is provided with a clearance through hole 51, which connects to the protective cavity. The clearance through hole 51 and the central transmission tube 3221 are coaxially arranged, and the transmission rod 312 passes through the clearance through hole 51. The protective cavity formed by the double protective shells completely encloses core transmission components such as the power input gear 322 and the final output gear 321. This effectively isolates contaminants such as moisture, detergent foam, and food residue inside the dishwasher, preventing gear corrosion, jamming, or lubrication failure caused by their intrusion. This further improves the long-term reliability and service life of the transmission system. At the same time, the coaxial clearance through hole 51 on the second protective shell 5 ensures that the transmission rod 312 can pass through smoothly to achieve power transmission. Its precise fit also limits the opening size to the maximum extent, forming an effective physical barrier that prevents contaminants from entering the protective cavity from the shaft hole gap. This ensures both protection and the efficiency and accuracy of power transmission.

[0051] More preferably, the second protective housing 5 is spaced apart from the final output gear 321. This gap avoids wear dust and operating noise caused by contact friction between the high-speed rotating gear teeth and the inner wall of the second protective housing 5, thus ensuring transmission efficiency.

[0052] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0054] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A water distribution valve for a dishwasher, characterized in that, include: Base (1); Rotary sealing member (2), the rotary sealing member (2) is movably installed on the base (1) and supported by the base (1) so that the rotary sealing member (2) can rotate around itself relative to the base (1) in a circumferential direction, the rotary sealing member (2) is used to open or close the water inlet; Adjustment component (3), the adjustment component (3) includes a rotary drive device (31) and a transmission reduction mechanism (32), the rotary drive device (31) is mounted on the base (1) and supported by the base (1); the rotary drive device (31) is connected to the rotating sealing member (2) through the transmission reduction mechanism (32); the transmission reduction mechanism (32) includes a final stage output gear (321), the final stage output gear (321) is connected to the rotating sealing member (2) and drives the rotating sealing member (2) to rotate with the final stage output gear (321); The calibration device (4) includes a zero-point calibration limit part (41) and an angle detection sensor (42). The zero-point calibration limit part (41) is installed on the final stage output gear (321) to rotate with the final stage output gear (321). The angle detection sensor (42) is installed on the base (1), and the detection head of the angle detection sensor (42) is installed on the rotation path of the zero-point calibration limit part (41).

2. A water distribution valve for a dishwasher according to claim 1, characterized in that, The final stage output gear (321) includes a socket (3211) which extends along the axial direction of the final stage output gear (321). One end of the socket (3211) is movably mounted on the base (1) and supported by the base (1). The final stage output gear (321) and the socket (3211) are coaxially arranged. The final stage output gear (321) is arranged around the outer periphery of the socket (3211) and supported by the socket (3211) so that the socket (3211) can follow the final stage output gear (321) and rotate relative to the base (1) around the axis of the socket (3211).

3. A water distribution valve for a dishwasher according to claim 2, characterized in that, The zero-point correction limiting part (41) is a zero-point correction protrusion.

4. A water distribution valve for a dishwasher according to claim 3, characterized in that, The zero-point correction protrusion is mounted on the socket (3211) and extends radially from the inside to the outside along the socket (3211).

5. A water distribution valve for a dishwasher according to claim 2, characterized in that, The base (1) is provided with a positioning support column (11), and the socket (3211) is movably sleeved on the positioning support column (11), so that the socket (3211) can rotate relative to the positioning support column (11) around the axis of the positioning support column (11). The socket (3211) and the base (1) are spaced apart.

6. A water distribution valve for a dishwasher according to claim 1, characterized in that, The transmission reduction mechanism (32) further includes a power input gear (322), which is connected to the rotary drive device (31) in a transmission manner. The power input gear (322) meshes with the final stage output gear (321), and the number of teeth of the power input gear (322) is less than the number of teeth of the final stage output gear (321).

7. A water distribution valve for a dishwasher according to claim 6, characterized in that, The base (1) is provided with an annular clearance groove (12), and the power input gear (322) is provided with a central transmission tube (3221). The central transmission tube (3221) extends along the axial direction of the power input gear (322) and is inserted into the annular clearance groove (12). The edge of the annular clearance groove (12) is provided with an annular protrusion (13). The power input gear (322) is supported by the annular protrusion (13) and the power input gear (322) is spaced apart from the base (1).

8. A water distribution valve for a dishwasher according to claim 7, characterized in that, The rotary drive device (31) includes a motor (311) and a transmission rod (312). The motor (311) is connected to the transmission rod (312). The transmission rod (312) extends along the axial direction of the power input gear (322) and is connected to the central transmission tube (3221) so that the power input gear (322) rotates with the transmission rod (312).

9. A water distribution valve for a dishwasher according to claim 8, characterized in that, The base (1) is a first protective shell. The water distribution valve for a dishwasher also includes a second protective shell (5). The first protective shell and the second protective shell (5) together form a protective cavity. The power input gear (322) and the final stage output gear (321) are both located in the protective cavity. The second protective shell (5) is provided with a clearance through hole (51). The clearance through hole (51) communicates with the protective cavity. The clearance through hole (51) and the central transmission tube (3221) are coaxially arranged, and the transmission rod (312) passes through the clearance through hole (51).

10. A water distribution valve for a dishwasher according to claim 9, characterized in that, The second protective shell (5) is disposed at an interval from the final stage output gear (321).

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