Spray washing device of dish washing machine and dish washing machine

Abstract

The spray washing device of the dish washing machine comprises a water supply pipe, a spray arm assembly and a sealing piece, the water supply pipe is provided with a water supply port, the spray arm assembly is provided with a plurality of nozzles, the sealing piece is fixed to the spray arm assembly and provided with a sealing space, and the inner wall of the sealing piece is provided with a water storage cavity which is sunken downwards. The water storage cavity is communicated with the sealing space, the spray washing device has a first state and a second state, in the first state, the sealing piece is in contact with the water supply pipe, the sealing space is communicated with the water supply port, and in the second state, the sealing piece is separated from the water supply pipe. And when the placement frame is pushed and pulled, accumulated water cannot flow out from the butt joint position of the spraying arm assembly and the water supply pipe, and the use experience of a user is good.

Description

Technical Field

[0001] The utility model relates to the technical field of dishwashers, and in particular to a spray device and a dishwasher of a dishwasher. Background Art

[0002] Traditional dishwashers include an inner container defining a washing cavity, a water supply pipe for supplying water, a placement rack for placing tableware, and a spray arm for spraying water into the placement rack. The water supply pipe is provided in the inner container and at the rear side of the washing cavity. The placement rack is movably provided in the washing cavity defined by the inner container in the front-rear direction. The spray arm is provided on the placement rack and moves synchronously with the placement rack. During the washing process, the spray arm is cooperatively connected with the water supply pipe so that the water supply pipe can supply water to the spray arm. In the related art, the cooperation mode between the water supply pipe and the spray arm is a plug-in fit. The sealing performance of the plug-in fit part between the water supply pipe and the spray arm is poor. Moreover, after the dishwashing is completed, some water will accumulate in some structures of the spray arm and the water supply pipe. When the placement rack is pushed or pulled, the spray arm is disengaged from the water supply pipe, and the accumulated water will flow out from the docking position of the spray arm and the water supply pipe, resulting in the problem of water dripping when the placement rack is pushed or pulled, and there is room for improvement. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the above technical problems in the prior art to a certain extent. For this purpose, the utility model provides a spray device of a dishwasher, and the spray device of the dishwasher has good sealing performance at the cooperation part between the water supply pipe and the spray arm assembly, and when the placement rack is pushed or pulled, the accumulated water will not flow out from the docking position of the spray arm assembly and the water supply pipe, and the user experience is good.

[0004] The utility model also provides a dishwasher with the above spray device of the dishwasher.

[0005] According to an embodiment of the utility model, the spray device of the dishwasher includes: a water supply pipe provided with a water supply port;

[0006] a spray arm assembly provided with a plurality of spray nozzles;

[0007] a seal fixed to the spray arm assembly, the seal having a sealed space, the inner wall of the seal having a water storage cavity recessed downward, the water storage cavity communicating with the sealed space, the spray device having a first state and a second state, in the first state the seal is in contact with the water supply pipe and the sealed space communicates with the water supply port, and in the second state the seal is separated from the water supply pipe.

[0008] The spraying device of a dishwasher according to an embodiment of the present utility model has good sealing performance at the joint between the water supply pipe and the spray arm assembly, and when the placement rack is pushed or pulled, the accumulated water will not flow out from the docking position between the spray arm assembly and the water supply pipe, providing a good user experience.

[0009] In addition, the spraying device of a dishwasher according to an embodiment of the utility model may further have the following additional technical features:

[0010] According to some embodiments of the present utility model, the seal is provided with a plurality of the water storage cavities, and the water storage cavities are spaced apart in a direction away from the opening of the sealed space.

[0011] According to some embodiments of the present utility model, at least a part of the side wall of the longitudinal section of the seal is formed in a wavy shape, and the troughs of the wavy side wall of the seal define the water storage cavities.

[0012] According to some embodiments of the present utility model, the seal has a compressed state and a decompressed state. In the compressed state, the width of the water storage cavity of the seal becomes smaller; wherein, in the first state, the seal is in the compressed state, and in the second state, the seal is in the decompressed state.

[0013] According to some embodiments of the present utility model, the seal is provided with at least one partition rib, and both ends of the partition rib are respectively connected to the opposite side walls of the sealed space to divide the opening of the sealed space into a plurality of water diversion ports. In the first state, at least one of the water diversion ports is disposed opposite to the water supply port to be communicated.

[0014] According to some embodiments of the present utility model, the seal and the spray arm assembly are in plug-in fit.

[0015] According to some embodiments of the present utility model, the seal is provided with a plug-in protrusion, and the spray arm assembly is provided with an annular plug-in groove disposed around the sealed space, and the plug-in protrusion is inserted into the plug-in groove.

[0016] According to some embodiments of the present utility model, a positioning block is provided on the outer peripheral wall of the plug-in protrusion, and the spray arm assembly is provided with a positioning groove communicated with the plug-in groove, and the positioning block is located in the positioning groove.

[0017] According to some embodiments of the present utility model, the spray arm assembly includes: a spray arm, a connecting pipe and a adapter. The spray arm is provided with the spray orifice. One end of the connecting pipe is communicated with the spray arm, and the adapter is connected to the other end of the connecting pipe. The seal is fixed to the adapter and enables the sealed space to be communicated with the connecting pipe;

[0018] The water supply pipe includes an inner water pipe and a cover plate. The cover plate is provided on the inner water pipe. The water supply port is exposed outside the cover plate. The cover plate is provided with a first positioning member, and the spray arm assembly is provided with a second positioning member. In the second state, the first positioning member and the second positioning member cooperate to position the spray arm assembly.

[0019] According to some embodiments of the present invention, the first positioning member is formed as a positioning protrusion protruding from the cover plate;

[0020] The second positioning member is a fitting groove provided on the spray arm assembly, and the positioning protrusion is inserted into the fitting groove; in the height direction, there are a plurality of the fitting grooves, and the positioning protrusion can be selectively inserted and fitted with any one of the fitting grooves; in the height direction, a plurality of protruding portions are provided on the outer peripheral wall of the spray arm assembly at intervals, and the adjacent protruding portions define the fitting groove.

[0021] According to another aspect of the present invention, a dishwasher includes:

[0022] An inner container;

[0023] A placement rack for placing tableware, and the placement rack is movably provided in the inner container;

[0024] A spray washing device, which is the spray washing device of the above-mentioned dishwasher. The water supply pipe is provided in the inner container, and the spray arm assembly is provided on the placement rack. Description of the Drawings

[0025] Figure 1 is a schematic structural view of a spray washing device according to an embodiment of the present invention;

[0026] Figure 2 is a front view of a spray washing device according to an embodiment of the present invention;

[0027] Figure 3 is a sectional view of a spray washing device according to an embodiment of the present invention;

[0028] Figure 4 is a partial exploded view of a spray washing device according to an embodiment of the present invention;

[0029] Figure 5 is a partial exploded view of a spray washing device according to an embodiment of the present invention;

[0030] Figure 6 is a schematic structural view of a seal according to an embodiment of the present invention;

[0031] Figure 7 is a schematic structural view of a seal according to an embodiment of the present invention;

[0032] Figure 8It is a schematic structural diagram of an adapter according to an embodiment of the present invention;

[0033] Figure 9 It is a schematic structural diagram of an adapter according to an embodiment of the present invention;

[0034] Figure 10 It is a schematic structural diagram of an inner water pipe according to an embodiment of the present invention;

[0035] Figure 11 It is a schematic structural diagram of a cover plate according to an embodiment of the present invention.

[0036] Reference numerals:

[0037] Spraying device 100, water supply pipe 1, inner water pipe 11, water supply port 111, clamping protrusion 112, cover plate 12, first positioning member 121, clamping hole 122, through port 123,

[0038] Spraying arm assembly 2, spraying arm 21, spraying port 211, adapter 22, insertion slot 221, positioning slot 222, protruding portion 223, connecting pipe 23, sealing member 3, sealing space 31, opening of the sealing space 311, water diversion port 3111, water storage cavity 32, separating rib 33, insertion protrusion 34, positioning block 341. Detailed implementation manners

[0039] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0040] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "vertical", "width", "thickness", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0041] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0042] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection, an electrical connection or a connection that allows mutual communication; it may be a direct connection, or an indirect connection through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0043] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the horizontal height of the first feature is higher than that of the second feature.

[0044] A traditional dishwasher includes an inner container defining a washing cavity, a water supply pipe for supplying water, a placement rack for placing tableware, and a spray arm for spraying water into the placement rack. The water supply pipe is provided in the inner container and at the rear side of the washing cavity. The placement rack is movably provided in the washing cavity defined by the inner container in the front-rear direction. The spray arm is provided on the placement rack and moves synchronously with the placement rack. During the washing process, the spray arm is cooperatively connected with the water supply pipe so that the water supply pipe can supply water to the spray arm. In the related art, the cooperation mode between the water supply pipe and the spray arm is a plug-in fit. The sealing performance of the plug-in fit part between the water supply pipe and the spray arm is poor. Moreover, after the dishwashing is completed, part of the water will accumulate in the spray arm and part of the structure of the water supply pipe. When the placement rack is pushed or pulled, the spray arm is disengaged from the water supply pipe, and the accumulated water will flow out from the docking position between the spray arm and the water supply pipe, resulting in the problem of water dripping when the placement rack is pushed or pulled.

[0045] To this end, the present utility model designs a spray washing device 100 with a seal 3 provided at the connection between the spray arm assembly 2 and the water supply pipe 1, and the inner wall of the seal 3 is provided with a water storage cavity 32 recessed downward. Thus, the seal 3 can be used to improve the sealing performance at the cooperation between the water supply pipe 1 and the spray arm assembly 2, avoiding water leakage at the cooperation position. Moreover, the water storage cavity 32 is used to store part of the water remaining in the spray arm assembly 2, avoiding the accumulated water flowing out from the docking position between the spray arm and the water supply pipe 1 when the placement rack is pushed or pulled, that is, when the spray arm is disengaged from the water supply pipe 1, and improving the user experience.

[0046] The following refers to Figures 1 - 11 Describe the spray washing device 100 of the dishwasher according to an embodiment of the present utility model.

[0047] The spraying device 100 of a dishwasher according to an embodiment of the present utility model may include: a water supply pipe 1, a spray arm assembly 2, and a seal 3.

[0048] Among them, the water supply pipe 1 is connected to a water source and can direct the water at the water source to the spray arm assembly 2. The water supply pipe 1 is provided with a water supply port 111, and the water supply port 111 opened in the water supply pipe 1 is used to connect the water supply pipe 1 and the spray arm assembly 2, so that the water in the water supply pipe 1 can flow to the spray arm assembly 2.

[0049] The spray arm assembly 2 is provided with a plurality of spray nozzles 211, and the plurality of spray nozzles 211 can spray water outwards simultaneously to achieve the cleaning of the items in the dishwasher. A seal 3 is provided at the connection between the spray arm assembly 2 and the water supply pipe 1. The spraying device 100 has a first state and a second state. In the first state, the seal 3 contacts the water supply pipe 1 and the sealing space 31 communicates with the water supply port 111 to improve the sealing performance of the joint between the water supply pipe 1 and the spray arm assembly 2 by using the seal 3 and avoid water leakage at the joint position. Among them, the cross-sectional area of the seal 3 is larger than the cross-sectional area of the water supply port 111, so that the seal 3 can cover the water supply port 111 to ensure the sealing effect of the seal 3 on the water supply port 111. The seal 3 is fixed to the spray arm assembly 2. In the second state, the seal 3 is separated from the water supply pipe 1, that is, the seal 3 can move together with the movement of the spray arm assembly 2.

[0050] Among them, the seal 3 is provided with a sealing space 31, and the inner wall of the seal 3 is provided with a water storage cavity 32 that is recessed downward. In other words, the bottom of the inner wall of the seal 3 has a high surrounding structure and a low middle part structure, thereby defining a cavity that can store water, that is, a part of the structure of the water storage cavity 32. The water storage cavity 32 communicates with the sealing space 31 to store part of the water remaining in the spray arm assembly 2 by using the water storage cavity 32, and avoid the accumulated water from flowing out from the docking position between the spray arm assembly 2 and the water supply pipe 1 when pushing and pulling the spray arm assembly 2, that is, when the spraying device 100 is in the second state, and improve the user experience.

[0051] In some embodiments, the seal 3 has a shape change between the first state and the second state, and the water storage cavity 32 may only exist when the spraying device 100 is in the second state, that is, when the spray arm assembly 2 is disengaged from the water supply pipe 1, the accumulated water can be stored in the water storage cavity 32.

[0052] Alternatively, the water storage cavity 32 may also exist both when the spraying device 100 is in the first state and when the spraying device 100 is in the second state, and can also store part of the water remaining in the spray arm assembly 2 in the water storage cavity 32 to avoid the occurrence of water dripping during the process of pushing and pulling the spray arm assembly 2.

[0053] The water storage cavity 32 can be formed as a water storage space defined by the wave troughs at the bottom of the sealing space 31 in a wavy shape, or a water storage space with an upper opening formed by the downward depression of the bottom wall of the sealing space 31, etc.

[0054] The spray device 100 of the dishwasher according to the embodiment of the present utility model has good sealing performance at the joint of the water supply pipe 1 and the spray arm assembly 2, and when the placement rack is pushed or pulled, the accumulated water will not flow out from the docking position of the spray arm assembly 2 and the water supply pipe 1, providing a good user experience.

[0055] As Figure 3 shown, the seal 3 is provided with a plurality of water storage cavities 32 to jointly realize the water storage function by using the plurality of water storage cavities 32. When one of the water storage cavities 32 is full of water, the remaining water storage cavities 32 can still store the residual water, improving the effect of the seal 3 storing water to avoid dripping.

[0056] Among them, the water storage cavities 32 are spaced apart in the direction away from the opening 311 of the sealing space 31, so that the structure at the opening position of the water storage cavity 32 is flat, ensuring the sealing effect of the seal 3 and being more conducive to the shaping of the seal 3, reducing the production cost of the seal 3.

[0057] Specifically, referring to Figure 3 , at least a part of the side wall of the longitudinal section of the seal 3 is formed in a wavy shape. The wavy wall structure has wave crests and wave troughs. The accumulated water dripping at the wave crest position can be guided to the wave trough, and the water stored at the wave trough position will not flow out under the limitation of the wave crest. Thus, the wave troughs of the wavy side wall of the seal 3 define the water storage cavities 32.

[0058] Moreover, the part of the side wall of the longitudinal section of the seal 3 formed in a wavy shape is compressible. When this part of the structure is compressed, the pressure on the mating surface between the seal 3 and the water supply pipe 1 increases, which is beneficial to improving the sealing effect of the seal 3 at the docking position of the spray arm assembly 2 and the water supply pipe 1.

[0059] Among them, the seal 3 has a compressed state and a decompressed state. In the first state, the seal 3 is in the compressed state. In the compressed state, the width of the water storage cavity 32 of the seal 3 becomes smaller. When the seal 3 is compressed, it has an elastic force, and this elastic force can increase the pressure on the mating surface between the seal 3 and the water supply pipe 1, which is beneficial to improving the sealing effect of the seal 3 at the docking position of the spray arm assembly 2 and the water supply pipe 1.

[0060] In the second state, the seal 3 is in the decompressed state. The width of the water storage cavity 32 of the seal 3 is relatively larger than that in the compressed state. The water storage cavity 32 has enough space to accommodate the retained water. The water storage cavity 32 communicated with the inner cavity of the spray arm assembly 2 can store the accumulated water in the spray arm assembly 2, avoiding the accumulated water from flowing out from the docking position of the spray arm assembly 2 and the water supply pipe 1 when the spray arm assembly 2 is pushed or pulled, and improving the user experience.

[0061] Among them, in the first state, the seal 3 is in a compressed state. That is to say, when the seal 3 contacts the water supply pipe 1 and the sealing space 31 communicates with the water supply port 111, the seal 3 is in a compressed state. The side of the seal 3 close to the spray arm assembly 2 is fixed, so that the seal 3 has an elastic force toward the side close to the water supply pipe 1, and increases the pressure at the mating surface position between the seal 3 and the water supply pipe 1, thereby improving the sealing effect at this sealing surface.

[0062] Furthermore, as Figure 5 and Figure 7 shown, in order to shape the seal 3, the seal 3 is provided with at least one dividing rib 33. Both ends of the dividing rib 33 are respectively connected to the opposite side walls of the sealing space 31. Since the seal 3 is mostly made of rubber, and the seal 3 is soft and elastic in texture, the two side walls of the seal 3 tend to expand away from each other. Both ends of the dividing rib 33 are respectively connected to the opposite side walls of the sealing space 31, which can provide a pulling force for the opposite side walls of the sealing space 31 to approach each other, so as to keep the opening of the seal 3 in a certain shape.

[0063] Furthermore, the opening of the seal 3 has one or more water guiding parts, and the water supply port 111 can communicate with the water guiding parts correspondingly. When the opening of the seal 3 has multiple water guiding parts, the water supply port 111 can correspond to any one of the water guiding parts to achieve communication. The arrangement of the dividing rib 33 should avoid the corresponding position between the water guiding part and the water supply port 111. Therefore, the dividing rib 33 is arranged between two adjacent water guiding parts.

[0064] Specifically, the dividing rib 33 divides the opening 311 of the sealing space 31 into multiple water inlets 3111. In the first state, at least one water inlet 3111 is arranged opposite to the water supply port 111 to communicate.

[0065] Thus, the position of the seal 3 can be adjusted, and further the position of the spray arm assembly 2 and the placement rack connected to the spray arm assembly 2 can be adjusted. The water inlets 3111 corresponding to the water supply port 111 are different before and after adjusting the position.

[0066] Among them, as Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 7 shown, the part of the seal 3 connected to the dividing rib 33 bends inward. Since there is a pulling force toward the inside of the opening at the position where the side wall of the seal 3 is connected to the dividing rib 33, and the adjacent part is not affected by the pulling force and has an outward expanding elastic force, therefore, the edge of the opening of the seal 3 forms a shape that is concave at the connection of the dividing rib 33 and convex between the two connections of the dividing rib 33.

[0067] Furthermore, since the opening edge of the seal 3 forms a shape with the connection part of the partition ribs 33 being concave and the part between the connection parts of the two partition ribs 33 being convex, no matter from which direction, the shape of the seal 3 can be clearly seen, and then it can be judged which part of the seal 3 each water inlet 3111 is located in. During the installation process of the spray arm assembly 2, it is convenient and clear to identify which water inlet 3111 the opening of the seal 3 communicates with the water supply port 111 through, which is convenient for the user to adjust the position of the bowl rack.

[0068] The seal 3 is fixedly connected to the spray arm assembly 2. Specifically, referring to Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 9 , the connection between the seal 3 and the spray arm assembly 2 is mainly achieved through plug-in fit.

[0069] Specifically, the seal 3 is provided with a plug-in protrusion 34, and the spray arm assembly 2 is provided with an annular plug-in groove 221 arranged around the sealing space 31. The plug-in protrusion 34 is inserted into the plug-in groove 221. In some embodiments, an interference fit is adopted between the plug-in groove 221 and the plug-in protrusion 34 to improve the sealing performance at the mating position between the spray arm assembly 2 and the seal 3. Moreover, the connection stability between the seal 3 and the spray arm assembly 2 is improved.

[0070] Furthermore, in order to avoid assembly errors during the plug-in fit process between the seal 3 and the spray arm assembly 2 and prevent the spray arm assembly 2 from being installed in the reverse direction, the outer peripheral wall of the plug-in protrusion 34 is provided with a positioning block 341, and the positioning block 341 is asymmetrically arranged in the circumferential direction of the plug-in protrusion 34 to indicate the plug-in direction between the seal 3 and the spray arm assembly 2 before assembly.

[0071] The spray arm assembly 2 is provided with a positioning groove 222 communicating with the plug-in groove 221, and the positioning block 341 is located in the positioning groove 222. Thus, the position of the seal 3 can be adjusted through the opening position of the positioning groove 222 on the plug-in groove 221, so that each positioning block 341 on the seal 3 corresponds to the position of the plug-in groove 221.

[0072] The cooperation between the positioning block 341 and the positioning groove 222 can limit the seal 3 in the circumferential direction and further ensure the stability of the seal 3 installed on the spray arm assembly 2.

[0073] Referring to Figures 1 - 3 , the spray arm assembly 2 includes: a spray arm 21, a connecting pipe 23, and a connector 22.

[0074] Among them, the spray arm 21 is provided with spray nozzles 211. The space inside the spray arm 21 is communicated with the outside through the spray nozzles 211 to convey high-pressure water flow outward for cleaning tableware. One end of the connecting pipe 23 is communicated with the spray arm 21, and the other end is connected to the adapter 22 to communicate the inner cavity of the spray arm 21 with the water source. The seal 3 is fixed to the adapter 22 so that the sealed space 31 is communicated with the connecting pipe 23. The cross-sectional area of the water flow channel in the inner cavity of the spray arm assembly 2 gradually decreases from the sealed space 31 towards the direction of the spray nozzles 211 to increase the water pressure at the position of the spray nozzles 211 and improve the dishwashing effect.

[0075] Among them, since a plurality of water inlet openings 3111 are integrated at the opening of the sealed space 31 and the cross-sectional area at the opening of the sealed space 31 is the largest, the adapter 22 functions to contract the flow channel area in order to enable the water in the spray arm assembly 2 to flow more stably.

[0076] Further, referring to Figures 1 - 5 , the water supply pipe 1 includes an inner water pipe 11 and a cover plate 12. By dividing the water supply pipe 1 into two parts, the inner water pipe 11 mainly functions to convey water flow and has higher requirements for sealing performance. The cover plate 12 is provided with a complex structure to limit the spray arm assembly 2. The two are separately arranged, enabling the cover plate 12 and the inner water pipe 11 to be respectively formed and processed, which is beneficial to reducing the production difficulty of the water supply pipe 1 and the production cost of the dishwasher.

[0077] The cover plate 12 is arranged on the inner water pipe 11. In some embodiments, the inner water pipe 11 and the cover plate 12 are connected by snap connection so that the two can be assembled together, and the structure on the cover plate 12 is used to limit the spray arm assembly 2. Specifically, the inner water pipe 11 is provided with a snap projection 112, and the cover plate 12 is provided with a snap hole 122 to ensure the sealing performance of the inner water pipe 11 while realizing the connection between the two.

[0078] Further, the water supply port 111 is exposed outside the cover plate 12. Specifically, the water supply port 111 is opened on the inner water pipe 11 to communicate the inner cavity of the inner water pipe 11 with the outside through the water supply port 111. An access opening 123 is opened on the cover plate 12, and the opening of the access opening 123 enables the corresponding position of the cover plate 12 and the water supply port 111 to be avoided so that the water supply port 111 is exposed outside the cover plate 12.

[0079] Combined with Figure 1 、 Figure 2 、 Figure 5 、 Figure 8 、 Figure 9 and Figure 11In the illustrated embodiment, the cover plate 12 is provided with a first positioning member 121, and the spray arm assembly 2 is provided with a second positioning member. In the second state, the first positioning member 121 and the second positioning member cooperate to position the spray arm assembly 2. Since the spray arm assembly 2 is movable, the first positioning member 121 and the second positioning member can only cooperate in the second state to position the spray arm assembly 2. The user can judge whether the spray arm assembly 2 is stably connected to the water supply port 111 according to the positioning state of the first positioning member 121 and the second positioning member, so as to avoid water leakage or the water supply port 111 being unable to supply water to the spray arm assembly 2, which affects the dishwashing effect.

[0080] Specifically, the first positioning member 121 is formed as a positioning protrusion protruding from the cover plate 12, and the second positioning member is a mating groove provided on the spray arm assembly 2. The positioning protrusion is inserted into the mating groove. Thus, the cooperation between the positioning protrusion and the mating groove will not restrict the movement of the spray arm assembly 2, and can indicate the cooperation effect between the spray arm assembly 2 and the water supply port 111.

[0081] Refer to Figure 1 、 Figure 2 、 Figure 5 、 Figure 8 、 Figure 9 and Figure 11 , in the height direction, there are multiple mating grooves, and the positioning protrusion can selectively plug and cooperate with any one of the mating grooves. Thus, when the spray arm assembly 2 and the placement rack connected to the spray arm assembly 2 are adjusted in height, the positioning protrusion can selectively plug and cooperate with different mating grooves in the height direction to ensure that the height of the placement rack and the spray arm assembly 2 is adjustable.

[0082] Specifically, as shown in Figure 1 、 Figure 2 、 Figure 5 、 Figure 8 、 Figure 9 and Figure 11 , in the height direction, the outer peripheral wall of the spray arm assembly 2 is provided with a plurality of protruding portions 223 arranged at intervals, and the adjacent protruding portions 223 define the mating groove. Thus, the positioning protrusion is inserted between any two spaced-apart protruding portions 223, and can cooperate with the mating groove defined between the two protruding portions to realize the positioning of the spray arm assembly 2 by the positioning protrusion. By setting the protruding portions to define the mating groove, it is beneficial for the user to observe the cooperation situation between the spray arm assembly 2 and the positioning protrusion, so as to facilitate the user to confirm whether the spray arm assembly 2 is stably connected to the water supply port 111.

[0083] Furthermore, the positioning protrusion extends towards the spray arm assembly 2. When the positioning protrusion cooperates with the mating groove, it can also guide the spray arm assembly 2 during the process of the spray arm assembly 2 moving towards the water supply pipe 1, ensuring the stability of the movement process of the spray arm assembly 2.

[0084] A dishwasher according to another aspect of the present utility model includes: an inner container, a placement rack, and a spray washing device 100. The inner container defines a space for accommodating the placement rack, and the placement rack is for placing tableware. The placement rack is movably arranged in the space defined by the inner container. The spray washing device 100 is the spray washing device 100 of the dishwasher in the above embodiment. Wherein, the water supply pipe 1 is arranged in the space defined by the inner container and is located at the rear side. The space defined by the inner container has an opening at the front side. The placement rack is movably arranged in the space defined by the inner container in the front-rear direction. The spray arm assembly 2 is arranged on the placement rack and can move together with the placement rack.

[0085] A specific embodiment of the dishwasher of the present utility model will be described below with reference to the drawings.

[0086] The dishwasher includes: an inner container, a placement rack, and a spray washing device 100. The spray washing device 100 at least includes a water supply pipe 1 and a spray arm assembly 2.

[0087] The inner container defines a space for accommodating the placement rack, and the placement rack is for placing tableware. The placement rack is movably arranged in the space defined by the inner container. Wherein, the water supply pipe 1 is arranged in the space defined by the inner container and is located at the rear side. The space defined by the inner container has an opening at the front side. The placement rack is movably arranged in the space defined by the inner container in the front-rear direction. The spray arm assembly 2 is arranged in the middle part in the height direction of the space defined by the inner container, is arranged at the bottom of the placement rack, and can move together with the placement rack.

[0088] The water supply pipe 1 includes: an inner water pipe 11 and a cover plate 12. By dividing the water supply pipe 1 into two parts, the inner water pipe 11 mainly plays the role of conveying water flow, is connected to the water source, and can lead the water at the water source to the spray arm assembly 2, and has higher requirements for sealing. The cover plate 12 is provided with a complex structure to limit the spray arm assembly 2. The two are separately arranged, so that the cover plate 12 and the inner water pipe 11 can be respectively formed and processed, which is beneficial to reducing the production difficulty of the water supply pipe 1 and reducing the production cost of the dishwasher.

[0089] The inner water pipe 11 and the cover plate 12 are connected by snap connection so that the two can be assembled together, and the structure on the cover plate 12 is used to limit the spray arm assembly 2. Specifically, the inner water pipe 11 is provided with a snap protrusion 112, and the cover plate 12 is provided with a snap hole 122 to ensure the sealing of the inner water pipe 11 while realizing the connection between the two.

[0090] A water supply port 111 is opened on the inner water pipe 11 to communicate the inner cavity of the inner water pipe 11 with the outside through the water supply port 111. The water supply port 111 is used to connect the water supply pipe 1 and the spray arm assembly 2 so that the water in the water supply pipe 1 can flow to the spray arm assembly 2. An access port 123 is opened on the cover plate 12. The opening of the access port 123 enables the corresponding position of the cover plate 12 and the water supply port 111 to be avoided, so that the water supply port 111 is exposed outside the cover plate 12.

[0091] A seal 3 is provided at the connection between the spray arm assembly 2 and the water supply pipe 1. The washing device 100 has a first state and a second state. In the first state, the seal 3 is in contact with the water supply pipe 1 and the sealing space 31 is in communication with the water supply port 111, so as to use the seal 3 to improve the sealing performance at the mating position of the water supply pipe 1 and the spray arm assembly 2 and avoid water leakage at the mating position. The seal 3 is fixed to the spray arm assembly 2. In the second state, the seal 3 is separated from the water supply pipe 1, that is, the seal 3 can move together with the movement of the spray arm assembly 2.

[0092] Wherein, the seal 3 is provided with a sealing space 31. The inner wall of the seal 3 is provided with a plurality of water storage cavities 32 that are recessed downward. At least a part of the side wall of the longitudinal section of the seal 3 is formed into a wavy shape. The wavy wall structure has wave crests and wave troughs. The accumulated water dripping at the wave crest position can be guided to the wave trough. The water stored at the wave trough position will not flow out under the limitation of the wave crest. Thus, the wave troughs of the wavy side wall of the seal 3 define the water storage cavities 32.

[0093] The part of the side wall of the longitudinal section of the seal 3 that is formed into a wavy shape is compressible. When this part of the structure is compressed, the pressure on the mating surface of the seal 3 and the water supply pipe 1 increases, which is beneficial to improving the sealing effect of the seal 3 at the docking position of the spray arm assembly 2 and the water supply pipe 1. In the first state, the seal 3 is in a compressed state. That is to say, when the seal 3 is in contact with the water supply pipe 1 and the sealing space 31 is in communication with the water supply port 111, the seal 3 is in a compressed state. The side of the seal 3 close to the spray arm assembly 2 is fixed, so that the seal 3 has an elastic force towards the side close to the water supply pipe 1, and the pressure at the mating surface position of the seal 3 and the water supply pipe 1 increases, thereby improving the sealing effect at this sealing surface.

[0094] The plurality of water storage cavities 32 together realize the water storage function. When the water in one of the water storage cavities 32 overflows, the remaining water storage cavities 32 can still store the residual water, improving the effect of the seal 3 storing water to avoid dripping water.

[0095] The water storage cavities 32 are in communication with the sealing space 31 to use the water storage cavities 32 to store part of the water remaining in the spray arm assembly 2, so as to avoid the accumulated water flowing out from the docking position of the spray arm assembly 2 and the water supply pipe 1 when the spray arm assembly 2 is pushed and pulled, that is, when the washing device 100 is in the second state, improving the user experience.

[0096] In order to shape the seal 3, the seal 3 is provided with at least one partition rib 33. The two ends of the partition rib 33 are respectively connected to the opposite side walls of the sealing space 31. Since the seal 3 is mostly made of rubber, and the seal 3 is soft and elastic, the two side walls of the seal 3 tend to expand away from each other. The two ends of the partition rib 33 are respectively connected to the opposite side walls of the sealing space 31, which can provide a pulling force for the opposite side walls of the sealing space 31 to approach each other, so that the opening of the seal 3 can be maintained in a certain shape. The partition rib 33 divides the opening 311 of the sealing space 31 into a plurality of water inlets 3111. In the first state, at least one water inlet 3111 is arranged opposite to the water supply port 111 to be communicated.

[0097] Thus, the position of the seal 3 can be adjusted, and further the positions of the spray arm assembly 2 and the placement rack connected to the spray arm assembly 2 can be adjusted. The water inlets 3111 corresponding to the water supply port 111 are different before and after the position adjustment.

[0098] The part of the seal 3 connected to the partition rib 33 bends inward. Since there is a pulling force towards the inside of the opening at the position where the side wall of the seal 3 is connected to the partition rib 33, while the adjacent part is not affected by the pulling force and has an outward elastic force, therefore, the opening edge of the seal 3 forms a shape that is concave at the connection of the partition rib 33 and convex between the two connections of the partition rib 33.

[0099] Furthermore, since the opening edge of the seal 3 forms a shape that is concave at the connection of the partition rib 33 and convex between the two connections of the partition rib 33, no matter from which direction, the shape of the seal 3 can be clearly seen, and further the position of each water inlet 3111 of the seal 3 in the seal 3 can be judged. During the installation of the spray arm assembly 2, it can be conveniently and clearly recognized which water inlet 3111 at the opening of the seal 3 is communicated with the water supply port 111, which is convenient for the user to adjust the position of the bowl rack.

[0100] The spray arm assembly 2 includes: a spray arm 21, a connecting pipe 23 and a swivel joint 22.

[0101] Among them, the spray arm 21 is provided with a plurality of spray nozzles 211. The plurality of spray nozzles 211 can spray water outward simultaneously to convey high-pressure water flow outward to clean the items in the dishwasher. One end of the connecting pipe 23 is communicated with the spray arm 21, and the other end is connected to the swivel joint 22 to communicate the inner cavity of the spray arm 21 and the inner cavity of the swivel joint 22. The seal 3 is fixed to the swivel joint 22 and makes the sealing space 31 communicate with the inner cavity of the swivel joint 22, and further communicate with the connecting pipe 23. The cross-sectional area of the water flow channel in the inner cavity of the spray arm assembly 2 gradually decreases from the sealing space 31 towards the direction of the spray nozzles 211 to increase the water pressure at the position of the spray nozzles 211 and improve the dishwashing effect.

[0102] Among them, since a plurality of water inlets 3111 are integrally formed at the opening of the sealed space 31, and the cross-sectional area at the opening of the sealed space 31 is the largest. In order to enable the water in the spray arm assembly 2 to flow more stably, the adapter 22 functions to contract the flow channel area.

[0103] The seal 3 is fixedly connected to the adapter 22 of the spray arm assembly 2. Specifically, the connection between the seal 3 and the adapter 22 is mainly achieved through plug-in fit.

[0104] Specifically, the seal 3 is provided with an annular plug-in protrusion 34 arranged around the sealed space 31, and the adapter 22 is provided with a corresponding plug-in groove 221. The plug-in protrusion 34 is inserted into the plug-in groove 221, and an interference fit is adopted between the plug-in groove 221 and the plug-in protrusion 34 to improve the sealing performance at the mating position between the adapter 22 and the seal 3. Moreover, the connection stability between the seal 3 and the adapter 22 is improved.

[0105] Furthermore, in order to avoid assembly errors during the plug-in fit between the seal 3 and the adapter 22, such as reversing the up-down direction of the adapter 22, the outer peripheral wall of the plug-in protrusion 34 is provided with a positioning block 341, and the positioning block 341 is asymmetrically arranged in the circumferential direction of the plug-in protrusion 34 to indicate the plug-in direction between the seal 3 and the adapter 22 before assembly.

[0106] The adapter 22 is provided with a positioning groove 222 communicating with the plug-in groove 221 to prevent the positioning block 341 from interfering with the groove wall of the plug-in groove 221 during the insertion of the plug-in protrusion 34 into the plug-in groove 221. After assembly, the positioning block 341 is located in the positioning groove 222. Thus, the position of the seal 3 can be adjusted through the opening position of the positioning groove 222 on the plug-in groove 221, so that each positioning block 341 on the seal 3 corresponds to the position of the plug-in groove 221.

[0107] The cooperation between the positioning block 341 and the positioning groove 222 can limit the seal 3 in the circumferential direction, further ensuring the connection stability between the seal 3 and the adapter 22.

[0108] The cover plate 12 is provided with a first positioning member 121, and the adapter 22 is provided with a second positioning member. In the second state, the first positioning member 121 and the second positioning member cooperate to position the adapter 22, the spray arm 21 connected to the adapter 22, and the placement rack. Since the adapter 22 can move with the storage rack, the first positioning member 121 and the second positioning member can only cooperate in the second state, and the adapter 22 is positioned by the first positioning member 121. Users can judge whether the adapter 22 is stably connected to the water supply port 111 according to the positioning state of the first positioning member 121 and the second positioning member, so as to avoid water leakage or the water supply port 111 being unable to supply water to the adapter 22, which affects the dishwashing effect.

[0109] Specifically, the first positioning member 121 is formed as a positioning protrusion protruding from the cover plate 12, and the second positioning member is a fitting groove provided on the adapter 22. The positioning protrusion is inserted into the fitting groove. Thus, the cooperation between the positioning protrusion and the fitting groove will not restrict the movement of the adapter 22, and can indicate the fitting effect between the adapter 22 and the water supply port 111.

[0110] Refer to Figure 1 , Figure 2 , Figure 5 , Figure 8 , Figure 9 and Figure 11 , in the height direction, there are multiple fitting grooves, and the positioning protrusion can selectively plug and cooperate with any one of the fitting grooves. At this time, the water supply port 111 can also selectively cooperate with any one of the multiple water diversion ports 3111. The fitting grooves correspond to the positions of the water diversion ports 3111. Thus, when the adapter 22 and the placement rack connected to the adapter 22 are adjusted in height, the positioning protrusion can selectively plug and cooperate with different fitting grooves in the height direction, and the fitting grooves can selectively communicate with different water diversion ports 3111 in the height direction, ensuring that the placement rack and the spray arm assembly 2 are height adjustable.

[0111] Specifically, in the height direction, the outer peripheral wall of the adapter 22 is provided with multiple protruding portions 223 arranged at intervals. The adjacent protruding portions 223 define the fitting groove. Thus, the positioning protrusion is inserted between any two protruding portions 223 arranged at intervals, and can cooperate with the fitting groove defined between the two protruding portions, realizing the positioning of the adapter 22 by the positioning protrusion. By setting the protruding portions to define the fitting groove, it is beneficial for users to observe the cooperation situation between the adapter 22 and the positioning protrusion, so as to facilitate the user to confirm whether the adapter 22 is stably connected to the water supply port 111.

[0112] Furthermore, the positioning protrusion extends in the direction close to the adapter 22. When the positioning protrusion cooperates with the fitting groove, it can also guide the adapter 22 during the process of the adapter 22 moving towards the water supply pipe 1, ensuring the stability of the movement process of the adapter 22.

[0113] The spraying device 100 further includes an upper spraying arm and a lower spraying arm, and the upper spraying arm and the lower spraying arm are respectively arranged at the top and bottom of the space defined by the inner tank, and are simultaneously communicated with the water supply pipe 1.

[0114] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0115] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A spray device for a dishwasher, characterized in that: include: A water supply pipe, wherein the water supply pipe is provided with a water supply port; A spray arm assembly, wherein the spray arm assembly is provided with a plurality of spray ports; A seal, wherein the seal is fixed to the spray arm assembly, the seal is provided with a sealed space, the inner wall of the seal is provided with a downwardly recessed water storage chamber, the water storage chamber is communicated with the sealed space, the spray washing device has a first state and a second state, in the first state the seal is in contact with the water supply pipe and the sealed space is communicated with the water supply port, and in the second state the seal is separated from the water supply pipe.

2. The spraying device of the dishwasher according to claim 1, characterized in that: The sealing member is provided with a plurality of the water storage chambers, and the water storage chambers are arranged at intervals in a direction away from the opening of the sealing space.

3. The spraying device of the dishwasher according to claim 2, characterized in that: At least a portion of a side wall of a longitudinal section of the sealing member is formed in a wave shape, and a wave trough of the wave-shaped side wall of the sealing member defines the water storage chamber.

4. The spraying device of the dishwasher according to claim 3, characterized in that: The sealing member has a compressed state and a decompressed state, and in the compressed state, the width of the water storage cavity of the sealing member becomes smaller; Wherein, in the first state, the sealing element is in a compressed state, and in the second state, the sealing element is in a decompressed state.

5. The spraying device of the dishwasher according to claim 1, characterized in that: The sealing member is provided with at least one dividing rib, both ends of which are respectively connected to opposite side walls of the sealed space to divide the opening of the sealed space into a plurality of water inlets, and in the first state at least one of the water inlets is arranged opposite to the water supply port for communication.

6. The spraying device of the dishwasher according to claim 1, characterized in that: The sealing element and the spray arm assembly are plug-fitted.

7. The spraying device of the dishwasher according to claim 6, characterized in that: The sealing member is provided with an inserting protrusion, and the spray arm assembly is provided with an annular inserting groove arranged around the sealing space, and the inserting protrusion is inserted into the inserting groove.

8. The spraying device of the dishwasher according to claim 7, characterized in that: A positioning block is provided on the outer peripheral wall of the plug-in protrusion, and the spray arm assembly is provided with a positioning groove communicated with the plug-in groove, and the positioning block is located in the positioning groove.

9. The spraying device of the dishwasher according to claim 1, characterized in that: The spray arm assembly comprises a spray arm, a connecting pipe and an adapter, the spray arm is provided with the spray port, one end of the connecting pipe is communicated with the spray arm, the adapter is connected with the other end of the connecting pipe, the sealing member is fixed to the adapter and enables the sealed space to communicate with the connecting pipe; The water supply pipe includes: an inner water pipe and a cover plate, the cover plate is arranged on the inner water pipe, the water supply port is exposed on the cover plate, the cover plate is provided with a first positioning member, and the spray arm assembly is provided with a second positioning member. In the second state, the first positioning member and the second positioning member cooperate to position the spray arm assembly.

10. The spraying device of the dishwasher according to claim 9, characterized in that: The first positioning member is formed as a positioning protrusion protruding from the cover plate; The second positioning member is a matching groove provided on the spray arm assembly, and the positioning protrusion is inserted into the matching groove; In the height direction, there are multiple matching grooves, and the positioning protrusion can be selectively plugged into and matched with any of the matching grooves; In the height direction, the outer peripheral wall of the spray arm assembly is provided with a plurality of protrusions arranged at intervals, and adjacent protrusions define the matching groove.

11. A dishwasher, characterized in that: include: Liner; A placement rack for placing dishes and chopsticks, the placement rack being movably arranged on the inner pot; A spraying device, wherein the spraying device is the spraying device according to any one of claims 1 to 10, wherein the water supply pipe is arranged on the inner tank, and the spray arm assembly is arranged on the placement rack.

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