Regional washing and spraying arm control valve assembly and dish washing machine

Abstract

A regional washing spraying arm control valve assembly comprises a water supply pipe fitting, a main spraying arm, a control valve and an auxiliary spraying arm. The water supply pipe fitting is provided with a first water outlet pipe orifice and a second water outlet pipe orifice; the main spraying arm is provided with a main pipe connecting opening rotationally connected to the first water outlet pipe opening, and the auxiliary spraying arm is provided with an auxiliary pipe connecting opening connected to the second water outlet pipe opening; the control valve is arranged on the auxiliary pipe connecting opening and provided with a valve element and a valve rod, the valve element is located in the auxiliary pipe connecting opening, the control valve is provided with an assembly hole allowing the valve rod to be rotationally connected in an inserted mode, and the valve rod comprises a switching end connected to the valve element and an adjusting end penetrating through the assembly hole to the outer side of the control valve. The valve rod drives the valve element to rotate to achieve on-off control of the valve element on the auxiliary connecting pipe opening, so that the function of freely selecting whether the water supply pipe fitting supplies water to the auxiliary spraying arm or not is achieved, the actual washing requirement of a user is better met, and water source waste is reduced. A dishwasher is also provided.

Description

Technical Field

[0001] The invention relates to the technical field of dishwashers, and in particular to a zone wash spray arm control valve assembly and a dishwasher. Background Art

[0002] The main structure of a dishwasher includes a washing basket formed by a basket net and a spray arm arranged adjacent to the washing basket. The spray arm usually has multiple spray holes. The working principle is to spray a number of water jets through the rotating spray arm to flush the tableware in the washing basket, thereby achieving the normal cleaning function of the tableware.

[0003] Due to the uncertainty of the shape and degree of dirtiness of the utensils to be washed in actual use, the current solution is to add a regional strong washing spray arm in addition to the conventional spray arm, and use the nozzle of the regional strong washing spray arm to enhance the washing of some specific tableware, such as deep cups or some heavily dirty tableware.

[0004] However, the water supply pipes in the existing solutions generally supply water to the conventional spray arms and the regional strong washing spray arms at the same time. When enhanced washing is not required, the water flow sprayed by the nozzles of the regional strong washing spray arms will be wasted and affect the user's washing experience. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that in the prior art, water supply pipes generally supply water to conventional spray arms and regional strong washing spray arms at the same time. When only conventional cleaning is required and no enhanced washing is required, the water flow sprayed by the nozzle of the regional strong washing spray arm will be wasted, affecting the user's washing experience.

[0006] In order to solve the above problems, the present invention provides a regional washing spray arm control valve assembly, comprising a water supply pipe, a main spray arm, a control valve and an auxiliary spray arm; the water supply pipe is provided with a first water outlet and a second water outlet; the main spray arm is provided with a main pipe port rotatably connected to the first water outlet, and the auxiliary spray arm is provided with an auxiliary pipe port connected to the second water outlet; The control valve is arranged at the auxiliary pipe port, and is equipped with a valve core and a valve stem. The valve core is located in the auxiliary pipe port, and the control valve is provided with an assembly hole for the valve stem to be rotatably inserted. The valve stem includes a transfer end connected to the valve core and an adjustment end passing through the assembly hole to the outside of the control valve. The valve stem drives the valve core to rotate to realize the on-off control of the auxiliary pipe port by the valve core.

[0007] Compared with the prior art, the above scheme supplies water to the main spray arm and the auxiliary spray arm through the water supply pipe, and at the same time, a control valve is set at the auxiliary pipe port. The user can manually control the valve stem through the adjusting end of the valve stem to drive the valve core to rotate, and then realize the on-off control of the auxiliary pipe port through the rotation of the valve core, thereby realizing the free selection function of whether the water supply pipe supplies water to the auxiliary spray arm, thereby better adapting to the user's actual washing needs and reducing water waste.

[0008] In an improved solution, the axis of the valve stem is perpendicular to the axis of the auxiliary pipe port, and the valve stem has a first position and a second position when it rotates. When the valve stem rotates to the first position, the valve core controls the auxiliary pipe port to be in a conducting state, and when the valve stem rotates to the second position, the valve core controls the auxiliary pipe port to be in a blocked state, so by rotating the valve stem between the first position and the second position, the valve core can be adjusted to be in a conducting state or a blocked state with respect to the auxiliary pipe port.

[0009] In an improved solution, the rotation angle of the valve stem from the first position to the second position is 90 degrees.

[0010] In an improved solution, it also includes an end cover arranged on the outside of the control valve and opposite to the assembly hole, the end cover is provided with a avoidance hole for the adjusting end of the valve stem to pass through, and the rotational outer diameter of the valve stem in the avoidance hole is smaller than the aperture of the avoidance hole, thereby avoiding the problem of interference between the valve stem and the end cover when rotating.

[0011] In an improved solution, a raised limiting rib is provided on the side of the end cover facing the control valve, and the valve stem is provided with a first limiting portion corresponding to the limiting rib. When the valve stem rotates so that the first limiting portion abuts against one side of the limiting rib, the valve stem is in a first position; when the valve stem rotates so that the first limiting portion abuts against the other side of the limiting rib, the valve stem is in a second position, thereby achieving accurate positioning of the valve stem in the first position and the second position through the limiting action of the limiting rib on the first limiting portion.

[0012] In an improved solution, a conduction mark and a blockage mark are provided on the side of the end cover facing away from the limit valve. The position of the conduction mark corresponds to the position of the valve stem adjustment end when the valve stem is rotated to the first position, and the position of the blockage mark corresponds to the position of the valve stem adjustment end when the valve stem is rotated to the second position, thereby facilitating user identification.

[0013] In an improved solution, buckles are provided on both sides of the end cover, and protrusions are provided on both sides of the control valve. The two buckles are respectively connected to the two protrusions, so that when the end cover is damaged, it can be easily disassembled and replaced.

[0014] In an improved solution, the assembly hole is provided with a raised limiting boss, and the valve stem is provided with a second limiting portion corresponding to the limiting boss. When the valve stem is rotated so that the second limiting portion abuts against one side of the limiting boss, the valve stem is in the first position; when the valve stem is rotated so that the second limiting portion abuts against the other side of the limiting boss, the valve stem is in the second position. Therefore, even if the end cover is removed, the valve stem can still be accurately positioned in the first position and the second position by the limiting action of the limiting boss on the second limiting portion.

[0015] In an improved solution, a mounting portion is provided in the middle of the valve stem, and the mounting portion is provided with an annular groove along the circumferential direction. A sealing ring is installed in the annular groove. The mounting portion of the valve stem is rotatably inserted into the assembly hole, and the sealing ring is sealingly fitted between the mounting portion and the assembly hole, thereby achieving a better sealing effect between the valve stem and the assembly hole.

[0016] In an improved solution, a first channel is provided on the side of the auxiliary pipe port close to the second water outlet pipe port and a second channel is provided on the side close to the auxiliary spray arm, the first channel and the second channel are connected to each other, the first channel is sleeved to the second water outlet pipe port, the apertures of the second channel and the second water outlet pipe port are both smaller than the aperture of the first channel, the valve core is located in the first channel and is restricted between the second channel and the second water outlet pipe port, thereby realizing a stable connection between the auxiliary pipe port and the second water outlet pipe port.

[0017] In an improved solution, the valve core is spherical as a whole and its outer diameter is the same as the aperture of the first channel. The valve core is provided with a through hole and the axis of the through hole is perpendicular to the valve stem. Therefore, by rotating the valve core, the angle of the through hole relative to the first channel can be changed to control the conduction or blockage of the first channel.

[0018] In an improved solution, a mounting groove is provided on the side of the valve core facing the valve stem, and the adapter end of the valve stem is inserted into the mounting groove and circumferentially fixed, thereby achieving convenient assembly between the valve core and the valve stem.

[0019] In an improved solution, the cross-sectional shape of the mounting groove is polygonal, and the cross-sectional shape of the adapter end of the valve stem is the same as that of the mounting groove to achieve circumferential fixation; or the cross-sectional shape of the mounting groove is circular and the groove wall of the mounting groove is provided with a keyway, and the adapter end of the valve stem is provided with a shaft key that matches the keyway to achieve circumferential fixation.

[0020] In an improved solution, the shape and size of the through hole are consistent with the shape and size of the second hole channel, so that the water flow of the second water outlet can flow into the second hole channel through the through hole more stably.

[0021] The present invention also provides a dishwasher, comprising the zone wash spray arm control valve assembly as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is an overall schematic diagram of a zone wash spray arm control valve assembly, at which the valve stem is in a first position; Figure 2 is an overall schematic diagram of a zone wash spray arm control valve assembly, where the valve stem is in the second position; Figure 3 An exploded schematic diagram of a zone wash spray arm control valve assembly; Figure 4 It is a cross-sectional schematic diagram of a second water outlet and a secondary pipe port of a zone washing spray arm control valve assembly, when the valve stem is in a first position; Figure 5 It is a cross-sectional schematic diagram of a second water outlet and a secondary pipe port of a zone washing spray arm control valve assembly, when the valve stem is in a second position; Figure 6 A schematic diagram of a side of an end cover of a zone wash spray arm control valve assembly facing away from the control valve; Figure 7 A schematic diagram of an end cover of a zone wash spray arm control valve assembly facing the control valve side; Figure 8 A schematic diagram of an auxiliary spray arm of a zone wash spray arm control valve assembly; Fig. 9 A schematic diagram of an adjusting end of a valve stem of a zone wash spray arm control valve assembly; Fig.10 A schematic diagram of a transfer end of a valve stem of a zone wash spray arm control valve assembly; Fig.11 A schematic diagram of a valve core of a zone wash spray arm control valve assembly.

[0023] Description of reference numerals: 1. Water supply pipe fittings; 11. First water outlet; 12. Second water outlet; 2. Main spray arm; 21. Main pipe port; 3. Control valve; 30. Assembly hole; 301. Limiting boss; 31. Valve core; 311. Through hole; 312. Mounting groove; 32. Valve stem; 321. First limiting part; 322. Second limiting part; 323. Mounting part; 324. Annular groove; 33. Sealing ring; 34. Bump; 4. Auxiliary spray arm; 41. Auxiliary pipe port; 411. First channel; 412. Second channel; 5. End cover; 51. Avoidance hole; 52. Limiting rib; 53. Conductive mark; 54. Block mark; 55. Buckle. DETAILED DESCRIPTION

[0024] It should be understood by those skilled in the art that the following embodiments are only used to explain the technical principles of the embodiments of the present application and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art may adjust them as needed to adapt to specific application scenarios.

[0025] In the description of the following embodiments, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

[0026] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Example 1: Please refer to Figure 1-Figure 11 , a zone washing spray arm control valve assembly provided by embodiment 1 of the present invention comprises a water supply pipe 1, a main spray arm 2, a control valve 3 and an auxiliary spray arm 4; the water supply pipe 1 is provided with a first water outlet pipe port 11 and a second water outlet pipe port 12; the main spray arm 2 is provided with a main pipe port 21 rotatably connected to the first water outlet pipe port 11, and the auxiliary spray arm 4 is provided with an auxiliary pipe port 41 connected to the second water outlet pipe port 12; The control valve 3 is arranged at the auxiliary pipe port 41. The control valve 3 is equipped with a valve core 31 and a valve stem 32. The valve core 31 is located in the auxiliary pipe port 41. The control valve 3 is provided with an assembly hole 30 for the valve stem 32 to be rotatably plugged in. The valve stem 32 includes a transfer end connected to the valve core 31 and an adjustment end passing through the assembly hole 30 to the outside of the control valve 3. The valve stem 32 drives the valve core 31 to rotate to realize the on-off control of the auxiliary pipe port 41 by the valve core 31.

[0029] The above scheme supplies water to the main spray arm 2 and the auxiliary spray arm 4 through the water supply pipe 1, and at the same time, a control valve 3 is set at the auxiliary pipe port 41. The user can manually control the valve stem 32 through the adjustment end of the valve stem 32 to drive the valve core 31 to rotate, and then realize the on-off control of the auxiliary pipe port 41 through the rotation of the valve core 31, thereby realizing the free selection function of whether the water supply pipe 1 supplies water to the auxiliary spray arm 4, thereby better adapting to the user's actual washing needs and reducing water waste.

[0030] For better explanation, Figure 1 As a reference, the water supply pipe 1 is located at the front side, the auxiliary spray arm 4 is located at the rear side, the second water outlet pipe 12 is arranged backward, and the auxiliary pipe port 41 is connected forward with the second water outlet pipe 12. The control valve 3 is located between the water supply pipe 1 and the auxiliary spray arm 4, the valve stem 32 is vertical, the upper end of the valve stem 32 is the regulating end, and the lower end of the valve stem 32 is the transfer end.

[0031] Combination Figure 4 and Figure 5 As shown, in this embodiment, the axis of the valve stem 32 is perpendicular to the axis of the auxiliary pipe port 41, and the valve stem 32 has a first position and a second position when rotating. When the valve stem 32 rotates to the first position, the valve core 31 controls the auxiliary pipe port 41 to be in a conducting state, and when the valve stem 32 rotates to the second position, the valve core 31 controls the auxiliary pipe port 41 to be in a closed state, so that by rotating the valve stem 32 between the first position and the second position, the valve core 31 can be adjusted to be in a conducting state or a closed state with respect to the auxiliary pipe port 41. Preferably, the rotation angle of the valve stem 32 from the first position to the second position is 90 degrees.

[0032] Combination Figure 6 and Figure 7 As shown, as an improvement to the present embodiment, it further includes an end cover 5 arranged on the outside of the control valve 3 and opposite to the assembly hole 30, the end cover 5 is provided with a avoidance hole 51 for the regulating end of the valve stem 32 to pass through, and the rotational outer diameter of the portion of the valve stem 32 in the avoidance hole 51 is smaller than the aperture of the avoidance hole 51, thereby avoiding the problem of interference between the valve stem 32 and the end cover 5 when rotating.

[0033] Furthermore, a raised limiting rib 52 is provided on the side of the end cover 5 facing the control valve 3. In this embodiment, the limiting rib 52 is a fan-shaped structure with a central angle of 90 degrees. A raised first limiting portion 321 is provided at a position on the outside of the control valve 3 in the middle of the valve stem 32. The first limiting portion 321 is a fan-shaped structure with a central angle of 180 degrees. Of course, the limiting rib 52 and the middle of the first limiting portion 321 can be provided with a hollow area; the position of the first limiting portion 321 is opposite to the limiting rib 52. In other words, the limiting rib 52 is located within the rotation trajectory of the first limiting portion 321. When the valve stem 32 rotates so that the first limiting portion 321 abuts against one side of the limiting rib 52, the valve stem 32 is in the first position; when the valve stem 32 rotates so that the first limiting portion 321 abuts against the other side of the limiting rib 52, the valve stem 32 is in the second position, thereby achieving accurate positioning of the valve stem 32 at the first position and the second position through the limiting effect of the limiting rib 52 on the first limiting portion 321.

[0034] Preferably, a conduction mark 53 and a blockage mark 54 are provided on the side of the end cover 5 facing away from the limit valve. The position of the conduction mark 53 corresponds to the position of the adjustment end of the valve stem 32 when the valve stem 32 rotates to the first position, and the position of the blockage mark 54 corresponds to the position of the adjustment end of the valve stem 32 when the valve stem 32 rotates to the second position, thereby facilitating user identification.

[0035] In this embodiment, buckles 55 are provided on the left and right sides of the end cover 5, and protrusions 34 are provided on the left and right sides of the control valve 3. The two buckles 55 are respectively connected to the two protrusions 34, so that when the end cover 5 is damaged, it can be easily disassembled and replaced. Of course, in other embodiments, screw holes can also be provided on the outside of the auxiliary pipe port 41, and bolts can be provided on the end cover 5, and the end cover 5 can be installed relative to the auxiliary pipe port 41 by screwing the bolts and the screw holes.

[0036] like Figure 8As shown, in the present embodiment, the assembly hole 30 is provided with a raised limiting boss 301, and the middle part of the valve stem 32 is provided with a second limiting portion 322 corresponding to the limiting boss 301. In other words, the limiting boss 301 is located within the rotation trajectory of the second limiting portion 322. In the present embodiment, the limiting boss 301 and the second limiting portion 322 are both fan-shaped structures. When the valve stem 32 rotates so that the second limiting portion 322 abuts against one side of the limiting boss 301, the valve stem 32 is in the first position. When the valve stem 32 rotates so that the second limiting portion 322 abuts against the other side of the limiting boss 301, the valve stem 32 is in the second position. Therefore, even if the end cover 5 is removed, the valve stem 32 can still be accurately positioned in the first position and the second position by the limiting action of the limiting boss 301 on the second limiting portion 322. In addition, in the present embodiment, the limiting rib 52 and the assembly limiting boss 301 of the end cover 5 can be further optimized technically. Specifically, the spacing between the two sides of the limiting rib 52 is designed to be slightly larger than the spacing between the two sides of the limiting boss 301, so that when the valve stem 32 rotates to the first position, the first limiting portion 321 first contacts the limiting rib 52, and then the second limiting portion 322 contacts the limiting boss 301; similarly, when the valve stem 32 rotates to the second position, the first limiting portion 321 first contacts the limiting rib 52, and then the second limiting portion 322 contacts the limiting boss 301, so that the contact between the limiting rib 52 and the first limiting portion 321 is always prior to the contact between the limiting boss 301 and the second limiting portion 322, thereby reducing the wear of the limiting boss 301, and the limiting rib 52 can be replaced by the end cover 5 after it is worn.

[0037] like Fig.10 As shown, in this embodiment, a mounting portion 323 is provided in the middle of the valve stem 32, and the mounting portion 323 is provided with a circumferential annular groove 324, and a sealing ring 33 is installed in the annular groove 324. The mounting portion 323 of the valve stem 32 is rotatably inserted into the assembly hole 30, and the sealing ring 33 is sealingly fitted between the mounting portion 323 and the assembly hole 30, thereby achieving a better sealing effect between the valve stem 32 and the assembly hole 30.

[0038] like Figure 4 and Figure 5 As shown, in the present embodiment, a first hole 411 is provided on the side of the auxiliary pipe port 41 close to the second water outlet pipe port 12 and a second hole 412 is provided on the side close to the auxiliary spray arm 4, the first hole 411 and the second hole 412 are connected to each other, the first hole 411 is sleeved to the second water outlet pipe port 12, the apertures of the second hole 412 and the second water outlet pipe port 12 are both smaller than the aperture of the first hole 411, the valve core 31 is located in the first hole 411 and is restricted between the second hole 412 and the second water outlet pipe port 12, thereby realizing a stable connection between the auxiliary pipe port 41 and the second water outlet pipe port 12.

[0039] More specifically, the valve core 31 is spherical as a whole and has an outer diameter that is the same as the aperture of the first channel 411. The valve core 31 is provided with a through hole 311 and the axis of the through hole 311 is perpendicular to the valve stem 32. The valve core 31 is spherical as a whole and is located in the first channel 411. The outer diameter of the valve core 31 is the same as the aperture of the first channel 411. The valve core 31 is provided with a through hole 311 and the axis of the through hole 311 is perpendicular to the valve stem 32, so that by rotating the valve core 31, the angle of the through hole 311 relative to the first channel 411 can be changed. When the axis of the through hole 311 is parallel to the axis of the first channel 411, the first channel 411 is connected; when the axis of the through hole 311 is perpendicular to the axis of the first channel 411, the first channel 411 is blocked.

[0040] like Fig.11 As shown, more specifically, regarding the assembly of the adapter end of the valve core 31 and the valve stem 32, this embodiment provides a mounting groove 312 on the side of the valve core 31 facing the valve stem 32, and the adapter end of the valve stem 32 is inserted into the mounting groove 312 and circumferentially fixed, thereby realizing convenient assembly between the valve core 31 and the valve stem 32.

[0041] The cross-sectional shape of the mounting groove 312 is polygonal, such as a square, and the cross-sectional shape of the adapter end of the valve stem 32 is the same as the mounting groove 312 to achieve circumferential fixation; or the cross-sectional shape of the mounting groove 312 is circular and the groove wall of the mounting groove 312 is provided with a keyway, and the adapter end of the valve stem 32 is provided with a shaft key that matches the keyway to achieve circumferential fixation.

[0042] In a preferred solution of this embodiment, the shape and size of the through hole 311 are consistent with the shape and size of the second hole 412 , so that the water flow of the second water outlet 12 can flow into the second hole 412 through the through hole 311 more stably.

[0043] Embodiment 2: Embodiment 2 of the present invention further provides a dishwasher, comprising the zone wash spray arm control valve assembly as described in Embodiment 1.

[0044] It should be noted that, in the description of the present application, the terms "inside", "outside", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application; all directional indications (such as up, down, left, right, front, back, inside, and outside) are only used to explain the relative positional relationship, movement, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0045] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "in the present embodiment", "specific example", or "some examples" etc. means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0046] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A zone washing spray arm control valve assembly, characterized in that: The invention comprises a water supply pipe (1), a main spray arm (2), a control valve (3) and an auxiliary spray arm (4); the water supply pipe (1) is provided with a first water outlet pipe opening (11) and a second water outlet pipe opening (12); the main spray arm (2) is provided with a main pipe opening (21) rotatably connected to the first water outlet pipe opening (11), and the auxiliary spray arm (4) is provided with an auxiliary pipe opening (41) connected to the second water outlet pipe opening (12); The control valve (3) is arranged at the auxiliary pipe port (41), and is equipped with a valve core (31) and a valve stem (32). The valve core (31) is located in the auxiliary pipe port (41), and the control valve (3) is provided with an assembly hole (30) for the valve stem (32) to be rotatably plugged in. The valve stem (32) comprises a transfer end connected to the valve core (31) and an adjustment end passing through the assembly hole (30) to the outside of the control valve (3). The valve stem (32) drives the valve core (31) to rotate so as to realize the on-off control of the valve core (31) on the auxiliary pipe port (41).

2. The zone wash spray arm control valve assembly according to claim 1, characterized in that: The axis of the valve stem (32) is perpendicular to the axis of the auxiliary pipe port (41). The valve stem (32) has a first position and a second position when it rotates. When the valve stem (32) rotates to the first position, the valve core (31) controls the auxiliary pipe port (41) to be in a conducting state. When the valve stem (32) rotates to the second position, the valve core (31) controls the auxiliary pipe port (41) to be in a closed state.

3. The zone wash spray arm control valve assembly according to claim 2, characterized in that: The valve stem (32) has a rotation angle of 90 degrees from the first position to the second position.

4. The zone wash spray arm control valve assembly according to claim 3, characterized in that: It also includes an end cover (5) arranged on the outside of the control valve (3) and opposite to the assembly hole (30), the end cover (5) being provided with a bypass hole (51) for the regulating end of the valve stem (32) to pass through, and the rotational outer diameter of the portion of the valve stem (32) in the bypass hole (51) is smaller than the hole diameter of the bypass hole (51).

5. The zone wash spray arm control valve assembly according to claim 4, characterized in that: A protruding limiting rib (52) is provided on a side of the end cover (5) facing the control valve (3), and a first limiting portion (321) corresponding to the limiting rib (52) is provided on the valve stem (32). When the valve stem (32) rotates so that the first limiting portion (321) abuts against one side of the limiting rib (52), the valve stem (32) is in a first position; when the valve stem (32) rotates so that the first limiting portion (321) abuts against the other side of the limiting rib (52), the valve stem (32) is in a second position.

6. The zone wash spray arm control valve assembly according to claim 4, characterized in that: A conduction mark (53) and a blockage mark (54) are provided on a side of the end cover (5) facing away from the limit valve, wherein the position of the conduction mark (53) corresponds to the position of the regulating end of the valve stem (32) when the valve stem (32) rotates to the first position, and the position of the blockage mark (54) corresponds to the position of the regulating end of the valve stem (32) when the valve stem (32) rotates to the second position.

7. The zone wash spray arm control valve assembly according to claim 4, characterized in that: Buckles (55) are provided on both sides of the end cover (5), and bumps (34) are provided on both sides of the control valve (3), and the two buckles (55) are respectively snap-connected to the two bumps (34).

8. The zone washing spray arm control valve assembly according to claim 2, 3 or 5, characterized in that: The assembly hole (30) is provided with a raised limiting boss (301), and the valve stem (32) is provided with a second limiting portion (322) corresponding to the limiting boss (301); when the valve stem (32) rotates so that the second limiting portion (322) abuts against one side of the limiting boss (301), the valve stem (32) is in the first position; when the valve stem (32) rotates so that the second limiting portion (322) abuts against the other side of the limiting boss (301), the valve stem (32) is in the second position.

9. The zone wash spray arm control valve assembly according to claim 1, characterized in that: A mounting portion (323) is provided in the middle of the valve stem (32), the mounting portion (323) is provided with an annular groove (324) along the circumferential direction, a sealing ring (33) is installed in the annular groove (324), the mounting portion (323) of the valve stem (32) is rotatably inserted into the assembly hole (30), and the sealing ring (33) is sealingly fitted between the mounting portion (323) and the assembly hole (30).

10. The zone washing spray arm control valve assembly according to any one of claims 1 to 3, characterized in that: A first hole (411) is provided on the side of the auxiliary pipe port (41) close to the second water outlet pipe port (12), and a second hole (412) is provided on the side close to the auxiliary spray arm (4); the first hole (411) and the second hole (412) are connected to each other; the first hole (411) is sleeved to the second water outlet pipe port (12); the apertures of the second hole (412) and the second water outlet pipe port (12) are both smaller than the aperture of the first hole (411); the valve core (31) is located in the first hole (411) and is confined between the second hole (412) and the second water outlet pipe port (12).

11. The zone wash spray arm control valve assembly according to claim 10, characterized in that: The valve core (31) is spherical as a whole and has an outer diameter that is the same as the aperture of the first hole (411). The valve core (31) is provided with a through hole (311) and the axis of the through hole (311) is perpendicular to the valve stem (32).

12. The zone wash spray arm control valve assembly according to claim 11, characterized in that: A mounting groove (312) is provided on one side of the valve core (31) facing the valve stem (32), and the adapter end of the valve stem (32) is plugged into the mounting groove (312) and fixed in the circumferential direction.

13. The zone wash spray arm control valve assembly according to claim 12, characterized in that: The cross-sectional shape of the mounting groove (312) is polygonal, and the cross-sectional shape of the adapter end of the valve stem (32) is the same as that of the mounting groove (312) to achieve circumferential fixation; or the cross-sectional shape of the mounting groove (312) is circular and a groove wall of the mounting groove (312) is provided with a keyway, and the adapter end of the valve stem (32) is provided with a shaft key that fits into the keyway to achieve circumferential fixation.

14. The zone wash spray arm control valve assembly according to claim 11, characterized in that: The shape and size of the through hole (311) are consistent with the shape and size of the second hole (412).

15. A dishwasher, characterized in that: It comprises a zone wash spray arm control valve assembly as described in any one of claims 1-14.

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