Regional washing spraying arm assembly and dish washing machine

Abstract

The invention discloses a regional washing and spraying arm assembly and a dish washing machine. The regional washing and spraying arm assembly comprises a washing basket, a water supply pipe fitting, a main spraying arm, a control valve and an auxiliary spraying arm. The water supply pipe fitting is connected to the lower side of the washing basket and provided with a first water outlet pipe opening and a second water outlet pipe opening. The main spraying arm is transversely arranged and located below the washing basket. The main spraying arm is provided with a main pipe connecting opening and a plurality of upward main spraying openings. The auxiliary spraying arm is transversely connected to the lower side of the washing basket, the auxiliary spraying arm is provided with an auxiliary pipe connecting opening and a plurality of spraying head assemblies, the second water outlet pipe opening and the auxiliary pipe connecting opening are connected with each other and controlled by the control valve to be switched on and off, and the spraying head assemblies are rotatably connected to the upper side of the auxiliary spraying arm with the vertical direction as the axis and provided with upward spraying holes. And the spray hole is designed to enable the spray head assembly to rotate when the liquid is sprayed out from the auxiliary flow channel through the spray hole. According to the scheme, conventional cleaning is conducted through the main spraying arm, and reinforced cleaning is achieved through the spray head assembly, capable of rotating, of the auxiliary spraying arm. The dish washing machine comprises the regional washing and spraying arm assembly.

Description

Technical Field

[0001] The invention relates to the technical field of dishwashers, and in particular to a zone washing spray arm 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] However, 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 nozzles of the regional strong washing spray arm to enhance the washing of some specific tableware, such as deep cups or some heavily dirty tableware. However, this solution has a limited cleaning coverage area and a limited cleaning effect because the nozzles of the regional strong washing spray arm are fixed. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the regional strong washing nozzle in the prior art is fixedly arranged, the cleaning coverage area is limited, and the cleaning effect on some specific tableware, such as deep cups or some heavily dirty tableware, is limited.

[0005] To solve the above problems, the present invention provides a regional washing spray arm assembly, including a washing basket, a water supply pipe, a main spray arm, a control valve and an auxiliary spray arm; The upper side of the washing basket is open, the water supply pipe is connected to the lower side of the washing basket, and the water supply pipe is provided with a first water outlet and a second water outlet, and the first water outlet is arranged vertically; The main spray arm is arranged horizontally and located below the washing basket, and is provided with a main pipe connection port rotatably connected to the first water outlet pipe port with a vertical axis, and a plurality of main spray ports arranged upward, and a main flow channel connecting the main pipe connection port and the plurality of main spray ports is provided in the main spray arm; The auxiliary spray arm is laterally connected to the lower side of the washing basket and is staggered relative to the rotation trajectory of the main spray arm. The auxiliary spray arm is provided with an auxiliary pipe port and a plurality of nozzle assemblies. The second water outlet pipe port and the auxiliary pipe port are connected to each other and are controlled on and off by the control valve. The nozzle assembly is rotatably connected to the upper side of the auxiliary spray arm with the vertical axis as the axis. A secondary flow channel connecting the auxiliary pipe port and a plurality of nozzle assemblies is provided in the auxiliary spray arm. The nozzle assembly is provided with an upward spray hole, and the spray hole is designed so that when liquid is sprayed from the auxiliary flow channel through the spray hole, the nozzle assembly will rotate.

[0006] Compared with the prior art, the above scheme, on the one hand, enables the main spray arm to rotate under the wash basket through the rotatable connection between the main pipe port of the main spray arm and the first water outlet port, thereby realizing the cleaning function of the main nozzle of the main spray arm on conventional utensils in the wash basket; on the other hand, the above scheme adds a sub-spray arm with a spray head assembly, and the spray hole of the spray head assembly is designed so that when the liquid is sprayed from the sub-channel through the spray hole, the spray head assembly will rotate, thereby greatly increasing the coverage area that the spray head assembly can clean, thereby realizing enhanced washing of utensils such as deep-mouthed cups or heavily dirty tableware, and whether the sub-spray arm is enabled can be conveniently controlled by a control valve, which is convenient for users to choose freely, effectively improving the user experience.

[0007] In an improved solution, a plurality of auxiliary nozzles are spaced apart along the long side direction on the upper side of the auxiliary spray arm, the nozzle assembly is connected to the auxiliary nozzles one by one, and the auxiliary pipe port is connected to the plurality of auxiliary nozzles through a auxiliary flow channel, thereby achieving the purpose of the liquid in the auxiliary pipe port flowing into the spray hole of the nozzle assembly through the auxiliary flow channel and the auxiliary nozzle.

[0008] In an improved solution, the auxiliary pipe port is arranged in the middle of the long side direction of the auxiliary spray arm, and the flow area of ​​the auxiliary flow channel corresponding to each auxiliary nozzle gradually decreases in the direction away from the auxiliary pipe port. Since the water pressure of the auxiliary flow channel will drop when passing through the auxiliary nozzle, after adopting the above structure, the flow area of ​​the auxiliary flow channel corresponding to the auxiliary nozzle farther away from the auxiliary pipe port is smaller, thereby achieving compensation for the water pressure.

[0009] In an improved solution, the width H of the secondary flow channel corresponding to each of the secondary nozzles decreases step by step in the direction away from the secondary pipe port, and the reduction size at each level is not less than 2 mm. By controlling the reduction size of the secondary flow channel at each level to be not less than 2 mm, a better water pressure compensation effect can be ensured.

[0010] In an improved solution, a guide structure is provided on the side of the secondary flow channel opposite to the secondary pipe port. The guide structure is trumpet-shaped and the tip of the guide structure is arranged toward the secondary pipe port, so that the water flow flowing into the secondary flow channel from the secondary pipe port can be diverted through the guide structure and then flow to each secondary nozzle more stably.

[0011] In an improved solution, an anti-dropout boss is provided on the outer peripheral wall of the second water outlet pipe port, and a limiting rib is provided at the junction of the second water outlet pipe port and the water supply pipe fitting, an anti-dropout hole is provided on the inner peripheral wall of the auxiliary pipe port, and a limiting groove is provided on one end of the auxiliary pipe port facing the water supply pipe fitting, the auxiliary pipe port is sleeved onto the second water outlet pipe port, and the anti-dropout boss is inserted into the anti-dropout hole, and the limiting rib is inserted into the limiting groove, thereby achieving a stable connection between the second water outlet pipe port and the auxiliary pipe port.

[0012] In an improved solution, the auxiliary spray arm is provided with at least two hooks, at least one hook is arranged parallel to the long side direction of the auxiliary spray arm and at least one hook is arranged parallel to the short side direction of the auxiliary spray arm, and the hooks are all connected to the basket net of the wash basket to realize the connection of the auxiliary spray arm relative to the wash basket, thereby making the disassembly and assembly of the auxiliary spray arm relative to the wash basket simple and convenient.

[0013] In an improved solution, the control valve is manual.

[0014] In an improved solution, the control valve is controlled on and off by a handle, and the handle passes upward through the bottom side net of the washing basket, so that the user can adjust the handle during the washing process.

[0015] In an improved solution, the nozzle assembly includes a nozzle and a fixed shaft, the fixed shaft is arranged vertically and the lower end is connected to the corresponding auxiliary nozzle, the nozzle is rotatably sleeved on the upper end of the fixed shaft with the vertical axis as the axis, there are several spray holes and they are all opened in the nozzle, and the fixed shaft is provided with an internal flow channel connecting the auxiliary nozzle and the spray hole, so that the structure is compact.

[0016] In an improved scheme, the nozzle is a sleeve-shaped structure with a closed upper side, the lower end of the nozzle hole penetrates to the inner wall of the nozzle and the upper end penetrates to the upper wall or the outer wall of the nozzle, the angle α of the axis of the upper end of the nozzle relative to the axis of the nozzle is in the range of 0<α<90 degrees, and the angle β of the axis of the upper end of the nozzle relative to the tangent of the corresponding position of the nozzle is in the range of 0≤β<90 degrees, so that when the liquid flows through the nozzle hole, the nozzle will be impacted by the liquid in the nozzle hole and rotate.

[0017] In an improved solution, the inner flow channel of the fixed axis has an interconnected water inlet and a water outlet, the water inlet is connected to the auxiliary nozzle, and the water outlet is arranged toward the inner circumferential wall of the nozzle, and the flow areas of the water inlet and the water outlet are larger than the sum of the flow areas of all the nozzles, thereby ensuring that after the liquid in the inner flow channel rushes from the water outlet to the nozzle, there is a greater water pressure in the nozzle, which not only makes the liquid sprayed from the nozzle stronger and improves the cleaning effect, but also enables the nozzle to rotate better.

[0018] In an improved solution, a guide structure is provided on the fixed axis above the water outlet of the inner flow channel. The guide structure is in a cone shape with a larger upper portion and a smaller lower portion. The guide structure is used to guide the liquid flowing out of the water outlet of the inner flow channel toward the inner circumferential wall of the nozzle.

[0019] The present invention also provides a dishwasher, comprising the zone washing spray arm assembly as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an overall schematic diagram of a zone washing spray arm assembly; Figure 2 A schematic top view of a zone wash spray arm assembly; Figure 3 is a schematic side view of a zone wash spray arm assembly; Figure 4 An exploded schematic diagram of a zone wash spray arm assembly; Figure 5 A schematic diagram of a water supply pipe fitting for a zone washing spray arm assembly; Figure 6 A schematic diagram of a main spray arm of a zone wash spray arm assembly; Figure 7 A schematic diagram of an auxiliary spray arm of a zone washing spray arm assembly; Figure 8 is a schematic diagram of a transverse cross section of an auxiliary spray arm of a zone washing spray arm assembly; Fig. 9 A schematic diagram of a vertical cross section of an auxiliary spray arm of a zone washing spray arm assembly; Fig.10 A schematic diagram of a spray head assembly of a zone washing spray arm assembly; Fig.11 A schematic cross-sectional view of a spray head assembly of a zone washing spray arm assembly; Fig.12 The present invention is a top view schematic diagram of a nozzle assembly of a zone washing spray arm assembly.

[0021] Description of reference numerals: 1. Washing basket; 2. Water supply pipe; 21. First water outlet; 22. Second water outlet; 221. Anti-drop boss; 222. Limiting rib; 3. Main spray arm; 31. Main pipe port; 32. Main flow channel; 33. Main nozzle; 4. Control valve; 41. Handle; 5. Auxiliary spray arm; 51. Auxiliary pipe port; 511. Anti-drop hole; 512. Limiting groove; 52. Auxiliary flow channel; 521. Guide structure; 53. Auxiliary nozzle; 54. Hook; 6. Nozzle assembly; 61. Nozzle; 611. Spray hole; 62. Fixed shaft; 621. Inner flow channel; 622. Water inlet; 623. Water outlet; 624. Guide structure. DETAILED DESCRIPTION

[0022] 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.

[0023] 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.

[0024] 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.

[0025] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Example 1: Please refer to Figure 1-Figure 12 , Embodiment 1 of the present invention provides a zone washing spray arm assembly, comprising a washing basket 1, a water supply pipe 2, a main spray arm 3, a control valve 4 and an auxiliary spray arm 5; The upper side of the washing basket 1 is open, the water supply pipe 2 is connected to the lower side of the washing basket 1, and the water supply pipe 2 is provided with a first water outlet 21 and a second water outlet 22, and the first water outlet 21 is arranged vertically; The main spray arm 3 is arranged horizontally and is located below the washing basket 1. The main spray arm 3 is provided with a main pipe port 31 which is rotatably connected to the first water outlet pipe port 21 with a vertical axis, and a plurality of main nozzles 33 arranged upward. A main flow channel 32 which connects the main pipe port 31 and the plurality of main nozzles 33 is provided in the main spray arm 3. The auxiliary spray arm 5 is laterally connected to the lower side of the washing basket 1 and is staggered relative to the rotation trajectory of the main spray arm 3. The auxiliary spray arm 5 is provided with an auxiliary pipe port 51 and a plurality of nozzle assemblies 6. The second water outlet pipe port 22 and the auxiliary pipe port 51 are connected to each other and are controlled by the control valve 4. The nozzle assembly 6 is rotatably connected to the upper side of the auxiliary spray arm 5 with the vertical axis as the axis. A secondary flow channel 52 connecting the auxiliary pipe port 51 and the plurality of nozzle assemblies 6 is provided in the auxiliary spray arm 5. The nozzle assembly 6 is provided with an upward spray hole 611, and the spray hole 611 is designed so that when the liquid is sprayed from the auxiliary flow channel 52 through the spray hole 611, the nozzle assembly 6 will rotate.

[0027] When the above scheme is used, the water supply pipe 2 transports the liquid to the first water outlet pipe 21 and the second water outlet pipe 22, wherein the main pipe port 31 of the main spray arm 3 is rotatably connected to the first water outlet pipe 21, so the main spray arm 3 can rotate under the washing basket 1, and the liquid in the first water outlet pipe 21 flows into the main spray arm 3 and then rushes out from the main spray port 33 to achieve the cleaning function of the conventional utensils in the washing basket 1. The rotatable connection between the main pipe port 31 of the main spray arm 3 and the first water outlet pipe 21 is a prior art and will not be described in detail. When it is necessary to perform enhanced washing of utensils such as deep-mouthed cups or heavily soiled tableware, by opening the control valve 4, the liquid enters the auxiliary spray arm 5 through the second water outlet pipe 22. Since the spray hole 611 of the nozzle assembly 6 is designed so that when the liquid is sprayed out from the secondary flow channel 52 through the spray hole 611, the nozzle assembly 6 will rotate. Due to the self-rotation of the nozzle assembly 6, the cleaning coverage area of ​​the liquid flushed out from the spray hole 611 is greatly increased, thereby achieving enhanced washing of utensils such as deep-mouthed cups or heavily soiled tableware. Whether the auxiliary spray arm 5 is enabled can be conveniently controlled by the control valve 4, which is convenient for users to choose freely, effectively improving the user experience.

[0028] like Figure 6 and Figure 7 As shown, the main spray arm 3 and the auxiliary spray arm 5 are both in the shape of long strips. Figure 1 As a reference, the long sides of the main spray arm 3 and the auxiliary spray arm 5 are both in the left-right direction. In order to ensure the cleaning effect of the conventional utensils in the washing basket 1, the main spray arm 3 is located in the middle of the front-to-back direction of the washing basket 1, so as to better cover the washing basket 1; the auxiliary spray arm 5 is located behind the main spray arm 3, and the auxiliary spray arm 5 is higher than the main spray arm 3, so as to stagger the rotation trajectory relative to the main spray arm 3 to avoid interference.

[0029] Combination Figure 8 and Fig. 9 As shown, a plurality of auxiliary nozzles 53 are spaced apart along the long side direction on the upper side of the auxiliary spray arm 5. In the present embodiment, the number of the auxiliary nozzles 53 is six, and the number of the nozzle assembly 6 is the same as that of the auxiliary nozzles 53. The nozzle assembly 6 is connected to the auxiliary nozzles 53 one by one, and the auxiliary pipe port 51 is connected to the plurality of auxiliary nozzles 53 through the auxiliary flow channel 52, so that the liquid in the auxiliary pipe port 51 flows into the spray hole 611 of the nozzle assembly 6 through the auxiliary flow channel 52 and the auxiliary nozzles 53.

[0030] As an improvement to this embodiment, the auxiliary pipe opening 51 is arranged in the middle of the long side of the auxiliary spray arm 5, so that there is at least one auxiliary spray opening 53 on both sides of the auxiliary pipe opening 51; it should be understood that the middle of the long side of the auxiliary spray arm 5 refers to the approximate part, not the center. Figure 1As a reference, there are four auxiliary nozzles 53 located on the left side of the auxiliary pipe port 51, and two auxiliary nozzles 53 located on the right side of the auxiliary pipe port 51. The flow area of ​​the auxiliary flow channel 52 corresponding to each auxiliary nozzle 53 decreases step by step in the direction away from the auxiliary pipe port 51. Since the water pressure of the auxiliary flow channel 52 will decrease when passing through the auxiliary nozzle 53, after adopting the above structure, the flow area of ​​the auxiliary flow channel 52 corresponding to the auxiliary nozzle 53 farther from the auxiliary pipe port 51 is smaller, thereby achieving the compensation effect on the water pressure.

[0031] More specifically, in the present embodiment, the height of the secondary flow channel 52 remains constant, and the width H of the secondary flow channel 52 corresponding to each secondary nozzle 53 decreases step by step in the direction away from the secondary pipe port 51, and the reduction size at each stage is not less than 2 mm. By controlling the reduction size of the secondary flow channel 52 at each stage to be not less than 2 mm, a better water pressure compensation effect can be ensured.

[0032] It should be understood that in other embodiments, the auxiliary pipe port 51 may also be provided at one end of the auxiliary spray arm 5 in the long side direction, or at other positions of the auxiliary spray arm 5, and this design is not limited to this.

[0033] like Figure 8 As shown, as a further improvement to the present embodiment, a guide structure 521 is provided on the side of the secondary flow channel 52 opposite to the secondary pipe port 51. The guide structure 521 is trumpet-shaped and the tip of the guide structure 521 is arranged toward the secondary pipe port 51, so that the water flow flowing into the secondary flow channel 52 from the secondary pipe port 51 can be diverted through the guide structure 521 and then flow to each secondary nozzle 53 more stably.

[0034] by Figure 1 As a reference, the second water outlet pipe port 22 is arranged backward on the rear side of the water supply pipe fitting 2, and the auxiliary pipe port 51 is arranged forward on the front side of the auxiliary spray arm 5. The connection between the second water outlet pipe port 22 and the auxiliary pipe port 51 can be connected through a flange, or in the present embodiment, the outer peripheral wall of the second water outlet pipe port 22 is provided with an anti-dropping boss 221, and a limiting rib 222 is provided at the junction of the second water outlet pipe port 22 and the water supply pipe fitting 2, the inner peripheral wall of the auxiliary pipe port 51 is provided with an anti-dropping hole 511, and a limiting groove 512 is provided at one end of the auxiliary pipe port 51 facing the water supply pipe fitting 2, the auxiliary pipe port 51 is sleeved onto the second water outlet pipe port 22, and the anti-dropping boss 221 is inserted into the anti-dropping hole 511 to realize axial limitation, and the limiting rib 222 is inserted into the limiting groove 512 to realize circumferential limitation, thereby realizing a stable connection between the second water outlet pipe port 22 and the auxiliary pipe port 51. The control valve 4 can be arranged on the second water outlet pipe port 22 and the auxiliary pipe port 51 to control the on-off of the two, or the control valve 4 can also be arranged on either the second water outlet pipe port 22 or the auxiliary pipe port 51 to control the on-off.

[0035] like Figure 7As shown, in the present embodiment, the auxiliary spray arm 5 is arranged with a plurality of hooks 54 along the long side direction, the positions of the hooks 54 correspond to the basket net of the washing basket 1, at least one hook 54 is arranged parallel to the long side direction of the auxiliary spray arm 5 and at least one hook 54 is arranged parallel to the short side direction of the auxiliary spray arm 5. In the present embodiment, a hook 54 located at the leftmost end of the auxiliary spray arm is arranged parallel to the long side direction of the auxiliary spray arm 5, and the remaining hooks 54 are all arranged along the short side direction parallel to the auxiliary spray arm 5. The hooks 54 are all connected to the basket net of the washing basket 1 to realize the connection of the auxiliary spray arm 5 relative to the washing basket 1, thereby making it simple and convenient to disassemble and assemble the auxiliary spray arm 5 relative to the washing basket 1.

[0036] It should be understood that in this embodiment, the auxiliary spray arm 5 is connected to the washing basket 1 through the hook 54. In other embodiments, the auxiliary spray arm 5 can also be connected to the washing basket 1 through bolts or other prior art fasteners.

[0037] The control valve 4 is preferably a manual control valve 4 in the prior art, and the control valve 4 is controlled on and off by a handle 41. In a preferred embodiment, the handle 41 passes upward through the bottom side net of the washing basket 1, so that the user can adjust the handle 41 during the washing process.

[0038] like Fig.10 and Fig.11 As shown, in this embodiment, the nozzle assembly 6 includes a nozzle 61 and a fixed shaft 62. The fixed shaft 62 is arranged vertically. The lower end of the fixed shaft 62 is connected to the corresponding auxiliary nozzle 53 by screwing or interference fitting. The nozzle 61 is rotatably sleeved on the upper end of the fixed shaft 62 with the vertical axis as the axis. There are multiple spray holes 611 and they are all opened on the nozzle 61. The fixed shaft 62 is provided with an internal flow channel 621 connecting the auxiliary nozzle 53 and the spray hole 611, so that the structure is compact.

[0039] For more details, see Fig.11 and Fig.12 In this embodiment, the nozzle 61 is a sleeve-shaped structure with a closed upper side, and there are two spray holes 611 distributed circumferentially on the nozzle 61. The lower end of the spray hole 61 penetrates to the inner peripheral wall of the nozzle 61, and the upper end of the spray hole 61 penetrates to the upper wall, or the outer peripheral wall, or the junction between the upper wall and the outer peripheral wall of the nozzle 61. The value range of the angle α between the axis of the upper end of the spray hole 611 and the axis of the nozzle 61 is 0<α<90 degrees; the value range of the angle β between the axis of the upper end of the spray hole 611 and the tangent of the corresponding position of the nozzle 61, or more accurately, the parallel line of the tangent, is 0≤β<90 degrees, so that when the liquid flows through the spray hole 611, the nozzle 61 will be impacted by the liquid in the spray hole 611 and rotate. Preferably, α is 30 degrees and β is 45 degrees; α is 45 degrees and β is 60 degrees. The smaller the angle α is, the greater the upward force of the liquid. When the angle α is 90 degrees, the liquid will rush outward laterally and cannot rush upward. The smaller the angle β is, the greater the force of the liquid in the nozzle hole 611 on the rotation of the nozzle 61.

[0040] The inner flow channel 621 of the fixed shaft 62 has an inlet 622 and an outlet 623 that are interconnected. The inlet 622 is connected to the auxiliary nozzle 53, and the outlet 623 is arranged toward the inner circumferential wall of the nozzle 61. The flow areas of the inlet 622 and the outlet 623 are both larger than the sum of the flow areas of all the nozzle holes 611. For example, there are two nozzle holes 611 in this embodiment, and the flow areas of the inlet 622 and the outlet 623 are both larger than the sum of the flow areas of the two nozzle holes 611, thereby ensuring that after the liquid in the inner flow channel 621 rushes from the outlet 623 to the nozzle hole 611, there is a greater water pressure in the nozzle hole 611, which not only makes the liquid sprayed from the nozzle hole 611 more powerful and improves the cleaning effect, but also enables the nozzle 61 to rotate better.

[0041] As an improvement to the fixed shaft 62 , a guide structure 624 is provided on the fixed shaft 62 above the water outlet 623 of the inner flow channel 621 . The guide structure 624 is in a cone shape with a larger upper portion and a smaller lower portion. The guide structure 624 is used to guide the liquid flowing out of the water outlet 623 of the inner flow channel 621 toward the inner circumferential wall of the nozzle 61 .

[0042] Embodiment 2: Embodiment 2 of the present invention further provides a dishwasher, comprising the zone wash spray arm assembly as described in Embodiment 1.

[0043] 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.

[0044] 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.

[0045] 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 assembly, characterized in that: It comprises a washing basket (1), a water supply pipe (2), a main spray arm (3), a control valve (4) and an auxiliary spray arm (5); The upper side of the washing basket (1) is open, the water supply pipe (2) is connected to the lower side of the washing basket (1), and the water supply pipe (2) is provided with a first water outlet pipe opening (21) and a second water outlet pipe opening (22), and the first water outlet pipe opening (21) is arranged vertically; The main spray arm (3) is arranged horizontally and is located below the washing basket (1); the main spray arm (3) is provided with a main pipe connection (31) rotatably connected to the first water outlet pipe (21) with a vertical axis, and a plurality of main spray ports (33) arranged upward; a main flow channel (32) is provided in the main spray arm (3) and is connected to the main pipe connection (31) and the plurality of main spray ports (33); The auxiliary spray arm (5) is laterally connected to the lower side of the washing basket (1) and is arranged staggered relative to the rotation trajectory of the main spray arm (3). The auxiliary spray arm (5) is provided with an auxiliary pipe port (51) and a plurality of spray head assemblies (6). The second water outlet pipe port (22) and the auxiliary pipe port (51) are connected to each other and are controlled on and off by the control valve (4). The spray head assembly (6) is rotatably connected to the upper side of the auxiliary spray arm (5) with the vertical axis as the axis. The auxiliary spray arm (5) is provided with an auxiliary flow channel (52) connecting the auxiliary pipe port (51) and the plurality of spray head assemblies (6). The spray head assembly (6) is provided with an upward spray hole (611), and the spray hole (611) is designed so that when liquid is sprayed from the auxiliary flow channel (52) through the spray hole (611), the spray head assembly (6) will rotate.

2. The zone washing spray arm assembly according to claim 1, characterized in that: A plurality of auxiliary nozzles (53) are spaced apart on the upper side of the auxiliary nozzle arm (5) along the long side direction, the nozzle assembly (6) is connected to the auxiliary nozzles (53) one by one, and the auxiliary pipe port (51) is connected to the plurality of auxiliary nozzles (53) through the auxiliary flow channel (52).

3. The zone washing spray arm assembly according to claim 2, characterized in that: The auxiliary pipe port (51) is arranged in the middle of the long side direction of the auxiliary spray arm (5), and the flow area of ​​the auxiliary flow channel (52) corresponding to each auxiliary spray port (53) decreases step by step in a direction away from the auxiliary pipe port (51).

4. The zone washing spray arm assembly according to claim 3, characterized in that: The width H of the secondary flow channel (52) corresponding to each of the secondary nozzles (53) decreases step by step in a direction away from the secondary pipe port (51), and the reduction in each step is not less than 2 mm.

5. The zone washing spray arm assembly according to claim 3, characterized in that: A flow guide structure (521) is provided on a side of the secondary flow channel (52) facing the secondary pipe port (51); the flow guide structure (521) is trumpet-shaped and the tip of the flow guide structure (521) is arranged toward the secondary pipe port (51).

6. The zone wash spray arm assembly according to claim 1, characterized in that: The outer peripheral wall of the second water outlet pipe opening (22) is provided with an anti-dropout boss (221), and a limiting rib (222) is provided at the junction of the second water outlet pipe opening (22) and the water supply pipe fitting (2). The inner peripheral wall of the auxiliary pipe opening (51) is provided with an anti-dropout hole (511), and one end of the auxiliary pipe opening (51) facing the water supply pipe fitting (2) is provided with a limiting groove (512). The auxiliary pipe opening (51) is sleeved onto the second water outlet pipe opening (22), and the anti-dropout boss (221) is inserted into the anti-dropout hole (511), and the limiting rib (222) is inserted into the limiting groove (512).

7. The zone wash spray arm assembly according to claim 1, characterized in that: The auxiliary spray arm (5) is provided with at least two hooks (54), at least one hook (54) is arranged parallel to the long side direction of the auxiliary spray arm (5) and at least one hook (54) is arranged parallel to the short side direction of the auxiliary spray arm (5), and the hooks (54) are all connected to the basket net of the washing basket (1) to realize the connection of the auxiliary spray arm (5) relative to the washing basket (1).

8. The zone wash spray arm assembly according to claim 1, characterized in that: The control valve (4) is manual.

9. The zone wash spray arm assembly according to claim 8, characterized in that: The control valve (4) is controlled to be on or off by a handle (41), and the handle (41) passes upward through the bottom net of the washing basket (1).

10. The zone wash spray arm assembly according to claim 2, characterized in that: The nozzle assembly (6) comprises a nozzle (61) and a fixed shaft (62); the fixed shaft (62) is arranged in a vertical direction and the lower end of the fixed shaft (62) is connected to the corresponding auxiliary nozzle (53); the nozzle (61) is rotatably sleeved on the upper end of the fixed shaft (62) with the vertical direction as the axis; there are a plurality of spray holes (611) which are all opened in the nozzle (61); and the fixed shaft (62) is provided with an inner flow channel (621) which communicates with the auxiliary nozzle (53) and the spray hole (611).

11. The zone wash spray arm assembly according to claim 10, characterized in that: The nozzle (61) is a sleeve-shaped structure with a closed upper side; the lower end of the nozzle hole (611) penetrates the inner peripheral wall of the nozzle head (61) and the upper end penetrates the upper wall or the outer peripheral wall of the nozzle head (61); the value range of the angle α between the axis of the upper end of the nozzle hole (611) and the axis of the nozzle head (61) is 0<α<90 degrees; the value range of the angle β between the axis of the upper end of the nozzle hole (611) and the tangent of the corresponding position of the nozzle head (61) is 0≤β<90 degrees.

12. The zone wash spray arm assembly according to claim 11, characterized in that: The inner flow channel (621) of the fixed shaft (62) has a water inlet (622) and a water outlet (623) that are connected to each other, the water inlet (622) is connected to the auxiliary nozzle (53), the water outlet (623) is arranged toward the inner peripheral wall of the nozzle (61), and the flow areas of the water inlet (622) and the water outlet (623) are both greater than the sum of the flow areas of all the spray holes (611).

13. The zone wash spray arm assembly according to claim 12, characterized in that: The fixed shaft (62) is provided with a guide structure (624) at a position above the water outlet (623) of the inner flow channel (621); the guide structure (624) is in a cone shape with a larger top and a smaller bottom; the guide structure (624) is used to guide liquid flowing out of the water outlet (623) of the inner flow channel (621) toward the inner peripheral wall of the nozzle (61).

14. A dishwasher, characterized in that: It comprises a zone wash spray arm assembly as described in any one of claims 1-13.

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