Spray arm mechanism and cleaning device

Abstract

A kind of spray arm mechanism, it includes liquid distribution assembly, third spray arm and rotary spray arm.The liquid distribution assembly includes shell and liquid inlet cavity in the shell.The third spray arm includes lower spray hole.The rotary spray arm is below the third spray arm, the rotary spray arm includes first spray hole and second spray hole, the first spray hole is communicated with the lower spray hole of the third spray arm.Compared with prior art, the spray arm mechanism of the application can realize multi-angle showering, improve cleaning efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of spray arm mechanism and cleaning equipment, belong to cleaning technical field. BACKGROUND

[0002] Common cleaning equipment, such as dishwasher, its spray arm mechanism is one of important components in dishwasher, liquid is sprayed to tableware by the liquid injection hole on spray arm mechanism, so as to realize the cleaning of tableware.The number, position, size etc.of liquid injection hole on spray arm mechanism can have great influence on the cleaning effect of tableware.

[0003] The spray arm mechanism commonly used in related art usually includes "one" shaped liquid outlet part, but this design can produce some dead angles difficult to clean due to the opening position of liquid injection hole;In order to solve the problem, the related art also uses "cross" or multi-wing liquid outlet part, but this design is easy to cause excessive water consumption. SUMMARY

[0004] The purpose of the present application is to provide a kind of spray arm mechanism with high cleaning efficiency.

[0005] To achieve the above purpose, the technical scheme is as follows:

[0006] A kind of spray arm mechanism, comprising:

[0007] Liquid distribution assembly, the liquid distribution assembly includes shell, liquid distribution part and liquid inlet cavity in the shell;

[0008] First spray arm, connected with the shell, including first liquid outlet part and first connecting channel connected with the first liquid outlet part, second liquid outlet part and second connecting channel communicated with the second liquid outlet part;

[0009] Second spray arm, connected with the shell, including third liquid outlet part and third connecting channel communicated with the third liquid outlet part, fourth liquid outlet part and first liquid distribution pipe communicated with the fourth liquid outlet part;

[0010] Third spray arm, connected with the shell, including fifth liquid outlet part and fifth connecting channel of the fifth liquid outlet part, first liquid distribution pipe and the fifth connecting channel are communicated;

[0011] Wherein, the liquid distribution assembly has the first state that first connecting channel, second connecting channel and fifth connecting channel are communicated with the liquid inlet cavity simultaneously, the second state that second connecting channel is communicated with the liquid inlet cavity, the third state that third connecting channel is communicated with the liquid inlet cavity, and the fourth state that first connecting channel, second connecting channel, third connecting channel and fifth connecting channel are communicated with the liquid inlet cavity simultaneously.

[0012] As a further improved technical solution of the present application,

[0013] The liquid distribution part comprises a liquid distribution valve and a driving element for driving the rotation of the liquid distribution valve, the liquid distribution valve is provided with a first opening and a third opening,

[0014] When the driving element drives the liquid distribution valve to rotate to the first opening and the first connecting channel and the second connecting channel are communicated, and the third opening and the fifth connecting channel are communicated, the liquid distribution assembly is in the first state; when the driving element drives the liquid distribution valve to rotate to the third opening and the third connecting channel are communicated, the liquid distribution assembly is in the third state.

[0015] As a further improved technical solution of the present application,

[0016] The liquid distribution valve is also provided with a second opening, and the size of the first opening is larger than that of the second opening;

[0017] When the driving element drives the liquid distribution valve to rotate to the second opening and the second connecting channel are communicated, the liquid distribution assembly is in the second state.

[0018] As a further improved technical solution of the present application, the liquid distribution valve is also provided with a fourth opening, and when the driving element drives the liquid distribution valve to rotate to the first opening and the first connecting channel and the second connecting channel are communicated, the third opening and the fifth connecting channel are communicated, and the fourth opening and the third connecting channel are communicated, the liquid distribution assembly is in the fourth state.

[0019] As a further improved technical solution of the present application, the fifth liquid outlet part comprises at least one fifth lower spray hole, and the fifth lower spray hole is communicated with the fifth connecting channel.

[0020] As a further improved technical solution of the present application, the third liquid outlet part comprises at least one third liquid outlet cavity and at least one third upper spray hole, the third upper spray hole is communicated with the third liquid outlet part, the third liquid outlet cavity is provided with a first perforation, and the third liquid outlet cavity and the first liquid preparation pipe are communicated through the first perforation;

[0021] The third liquid outlet part comprises at least one fourth liquid outlet cavity and at least one fourth lower spray hole, the fourth lower spray hole is communicated with the fourth liquid outlet cavity, the fourth liquid outlet cavity is provided with a second perforation, and the fourth liquid outlet cavity and the second liquid preparation pipe are communicated through the second perforation.

[0022] As a further improved technical solution of the present application, the first perforation is located inside the second perforation, the first perforation is arranged along a first diagonal line, and the second perforation is arranged along a second diagonal line intersecting the first diagonal line.

[0023] As a further improved technical solution of the present application, the spray arm mechanism comprises a liquid distribution pipe assembly connected to the first liquid distribution pipe and the second liquid distribution pipe, the liquid distribution pipe assembly comprises a first insertion hole in communication with the first liquid distribution pipe and a second insertion hole in communication with the second liquid distribution pipe; the spray arm mechanism further comprises a liquid distributor matched with the liquid distribution pipe assembly, the liquid distributor comprises a first plug-in head and a second plug-in head, wherein the first plug-in head is plugged into the first insertion hole, and the second plug-in head is plugged into the second insertion hole.

[0024] As a further improved technical solution of the present application,

[0025] The first liquid outlet part comprises a first liquid outlet cavity and at least one first spray hole, the first spray hole is in communication with the first liquid outlet cavity, and the first liquid outlet cavity is in communication with the first connecting channel;

[0026] The second liquid outlet part comprises a second liquid outlet cavity and at least one second spray hole, the second spray hole is in communication with the second liquid outlet cavity, and the second liquid outlet cavity is in communication with the second connecting channel.

[0027] As a further improved technical solution of the present application,

[0028] The first spray arm comprises a first sleeve connected to the first liquid outlet cavity, and the second connecting channel is arranged in the first sleeve;

[0029] The shell is provided with a first cylinder part comprising a first liquid inlet channel; the first sleeve is plugged into the first cylinder part, so that the first connecting channel is in communication with the first liquid inlet channel; when the driving element drives the distribution valve disc to rotate to the position where the second opening is in communication with the first liquid inlet channel, the distribution assembly is in the second state.

[0030] As a further improved technical solution of the present application, the shell comprises a cover plate and a second cylinder part extending upward from the cover plate, the first spray arm comprises a second sleeve connected to the second liquid outlet cavity, the second sleeve is at least partially inserted into the second cylinder part, the second sleeve is coaxial with the first sleeve, the pipe diameter of the first sleeve is smaller than that of the second sleeve, and the second connecting channel is in communication with the second liquid outlet cavity.

[0031] As a further improved technical solution of the present application,

[0032] The first cylinder part extends upward through the cover plate, the cover plate is provided with a slot communicating with the second connecting channel, and the liquid distribution assembly comprises a second liquid inlet channel communicating with the slot.

[0033] The driving element drives the liquid distribution valve to rotate to the first opening and the second liquid inlet channel to be aligned and communicated, and the liquid distribution assembly is in the first state.

[0034] As a further improved technical solution of the present application, the size of the first opening is slightly larger than the pipe diameter of the bottom of the second sleeve, and the size of the second opening is slightly smaller than the pipe diameter of the bottom of the first sleeve.

[0035] The present application also adopts the following technical solution: a cleaning device comprising the aforementioned spray arm mechanism.

[0036] Compared with the prior art, the cleaning device and the spray arm mechanism of the present application set the liquid distribution assembly, so that the spray arm mechanism can drive different spray arms to realize multi-angle spraying and meet different spraying requirements, thereby improving the cleaning efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 is a perspective view of the spray arm mechanism in one embodiment of the present application.

[0038] Figure 2 is Figure 1 a perspective view from another angle.

[0039] Figure 3 is Figure 1 a partial exploded view of

[0040] Figure 4 is Figure 1 a partial exploded view of the liquid distribution assembly in

[0041] Figure 5 is Figure 4 a top view of the housing in

[0042] Figure 6 is Figure 3 a top view of the liquid distribution assembly in the first position.

[0043] Figure 7 is a schematic view of the first opening of the liquid distribution assembly communicating with the first spray arm.

[0044] Figure 8 is a schematic view of the second opening of the liquid distribution assembly communicating with the first spray arm.

[0045] Figure 9 is a cross-sectional view of the spray arm mechanism of the present application.

[0046] Figure 10 is Figure 9 is a close-up view of the frame portion A, wherein the first opening of the dispensing assembly is in communication with the first spray arm.

[0047] Figure 11 is Figure 10 is a close-up view of another position, wherein the second opening of the dispensing assembly is in communication with the first spray arm.

[0048] Figure 12 is a cross-sectional view of the spray arm mechanism of the present application at another angle.

[0049] Figure 13 is Figure 12 is a close-up view of the frame portion B.

[0050] Figure 14 is a perspective view of the first spray arm.

[0051] Figure 15 is Figure 14 is a perspective exploded view of the first spray arm.

[0052] Figure 16 is a perspective view of the connecting joint, connecting pipe, second spray arm and third spray arm.

[0053] Figure 17 is Figure 12 is a close-up view of the frame portion C.

[0054] Figure 18 is a perspective view of the second spray arm, liquid dispensing pipe, liquid dispensing pipe assembly and liquid dispenser in another embodiment.

[0055] Figure 19 is a perspective view of the second spray arm when Figure 18 is rotated to a certain position and along Figure 18 is a cross-sectional view of D-D in

[0056] Figure 20 is a top view of the second spray arm.

[0057] Figure 21 is a perspective exploded view of the liquid dispensing pipe assembly and liquid dispenser.

[0058] Figure 22 is Figure 21 is a perspective view of the liquid dispenser in

[0059] Figure 23 is a perspective exploded view of the relative position of the liquid dispensing pipe assembly and liquid dispenser when the second spray arm is at a certain height.

[0060] Figure 24is a perspective view of the relative position of the liquid distribution pipe assembly and the liquid distributor when the second spray arm is at the other height. DETAILED DESCRIPTION

[0061] The exemplary embodiments of the present application will be described in detail below with reference to the attached drawings. If there are several embodiments, the features in the embodiments can be combined with each other when there is no conflict. When the description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The description of the exemplary embodiments described below does not represent all embodiments consistent with the present application; rather, they are merely examples of devices, products and / or methods consistent with some aspects of the present application as recited in the claims of the present application.

[0062] The terms used in the present application are merely for the purpose of describing the exemplary embodiments and are not intended to limit the scope of the protection of the present application. The singular form "a", "an" and "the" used in the specification and claims of the present application are also intended to include the plural form unless the context clearly indicates otherwise.

[0063] It should be understood that the use of terms such as "first", "second" and similar terms in the description of the present application and in the claims of the present application do not denote any order, number or importance, but are merely used to distinguish the features. Similarly, the use of "one" or "a" or similar terms also does not denote a numerical limitation, but means that at least one exists. Unless otherwise indicated, the terms "front", "back", "up", "down", and similar terms in the present application are used for the purpose of illustration only and are not limited to a particular position or spatial orientation. The terms "include" or "contain" or similar terms are open-ended terms, meaning that the elements appearing before the "include" or "contain" are encompassed, as well as equivalents thereof, and do not exclude the possibility that the elements appearing before the "include" or "contain" can also contain other elements. If "several" appears in the present application, it means two or more.

[0064] Please refer to Figures 1 to 16 The embodiment illustrated in the present application discloses a spray arm structure which can be used in a dishwasher to clean dishes by spraying water. The spray arm structure includes a liquid distribution assembly 1 at the bottom, a first spray arm 2, a second spray arm 3 and a third spray arm 4. The third spray arm 4 is provided with a plurality of fifth lower spray holes 41. In an embodiment of the present application, the first spray arm 2, the second spray arm 3 and the third spray arm 4 can all rotate under the drive of water, so as to easily realize multi-angle and dead-angle-free spraying.

[0065] Please refer toFigure 4 and Figure 10 As shown in the figure, the liquid distribution assembly 1 comprises a housing 11, a bottom cover 12 installed in the housing 11, a driving element 13 matched with the bottom cover 12, and a liquid distribution valve sheet 14 matched with the driving element 13.

[0066] In the illustrated embodiment of the present application, the housing 11 is of split structure, comprising a lower housing 111, an upper housing 112, and a sealing ring 113 sealed between the upper housing 112 and the lower housing 111.

[0067] The lower housing 111 is provided with a liquid inlet cavity 1110 and a liquid inlet port 1111 communicated with the liquid inlet cavity 1110. The bottom cover 12 is fixed at the bottom of the lower housing 111 and seals the liquid inlet cavity 1110 from the bottom. In the illustrated embodiment of the present application, the bottom cover 12 is provided with a top wall 121 located at the bottom of the liquid inlet cavity 1110. The top wall 121 is of non-horizontal structure, comprising a concave portion 122 concaved downward. One side of the concave portion 122 is higher than the other side of the concave portion 122, thereby facilitating the adjustment of water flow. The bottom cover 12 is further provided with an installation hole 123 penetrating upward and downward, which is used to match with the driving element 13.

[0068] In the illustrated embodiment of the present application, the driving element 13 is an electric machine 131 and a rotating shaft 132 matched with the electric machine 131. Specifically, the electric machine 131 is provided with a rotor 1311. The bottom of the rotating shaft 132 is provided with a clamping groove 1321 fixed with the rotor 1311. The rotating shaft 132 is installed in the installation hole 123 and comprises a top end portion 1322 penetrating out of the installation hole. The top end portion 1322 protrudes upwardly beyond the top wall 121 of the bottom cover 12, which is used to fix with the liquid distribution valve sheet 14.

[0069] Further, the lower housing 111 further comprises a first cylindrical portion 1112 extending upwardly, a first outer cylindrical portion 1113 surrounding the outer periphery of the first cylindrical portion 1112 and having a height lower than that of the first cylindrical portion 1112, and a plurality of apertures 1114 between the first cylindrical portion 1112 and the first outer cylindrical portion 1113. In an embodiment of the present application, the first cylindrical portion 1112 and the first outer cylindrical portion 1113 are both cylindrical and coaxially arranged. The first cylindrical portion 1112 has a first liquid inlet passage 1115 extending upwardly therethrough. The first liquid inlet passage 1115 selectively communicates with the liquid inlet cavity 1110, i.e. when the distribution valve piece 14 is at a certain position, the first liquid inlet passage 1115 communicates with the liquid inlet cavity 1110; when the distribution valve piece 14 is at another position, the first liquid inlet passage 1115 does not communicate with the liquid inlet cavity 1110. The lower housing 111 further comprises a first connecting boss 1116 and a second connecting boss 1117 located at the side of the first outer cylindrical portion 1113, and the first connecting boss 1116 and the second connecting boss 1117 both comprise passages 1118 extending upwardly and downwardly therethrough. Depending on the position of the distribution valve piece 14, the passages 1118 selectively communicate with the liquid inlet cavity 1110, i.e. when the distribution valve piece 14 is at a certain position, the passages 1118 of the first connecting boss 1116 and / or the passages 1118 of the second connecting boss 1117 can communicate with the liquid inlet cavity 1110 through corresponding apertures on the distribution valve piece 14, so that water can flow into the passages 1118 of the first connecting boss 1116 and / or the passages 1118 of the second connecting boss 1117; when the distribution valve piece 14 is at another position, the passages 1118 of the first connecting boss 1116 and / or the passages 1118 of the second connecting boss 1117 cannot communicate with the liquid inlet cavity 1110 because they are blocked by the solid portion of the distribution valve piece 14, so that water cannot flow into the passages 1118 of the first connecting boss 1116 and / or the passages 1118 of the second connecting boss 1117.

[0070] Please refer to Figure 4 and Figure 6 The distribution valve piece 14 is substantially circular. The distribution valve piece 14 comprises an extension 140 protruding downwardly at the center thereof. The extension 140 is provided with a fixing aperture 1401 for accommodating and fixing the top end portion 1322 of the rotating shaft 132. In this way, when the driving element 13 rotates, the rotating shaft 132 can be rotated by the rotor 1311, and the distribution valve piece 14 can be rotated by the rotating shaft 132.

[0071] Please refer to Figure 6As shown, the liquid distribution valve plate 14 further comprises a first opening 141, a second opening 142 and a third opening 143, wherein the first opening 141 has a larger size than the second opening 142. In the illustrated embodiment of the present application, the first opening 141, the second opening 142 and the third opening 143 are all circular holes. In other embodiments, the liquid distribution valve plate 14 can further comprise a fourth opening, a fifth opening, etc., which can be arranged according to specific requirements.

[0072] As shown in Figure 4 and Figure 10 As shown, the upper shell 112 comprises a cover plate 1121, a second cylindrical portion 1122 extending upwardly from the cover plate 1121, and a second outer cylindrical portion 1123 extending downwardly from the cover plate 1121. In an embodiment of the present application, the second cylindrical portion 1122 and the second outer cylindrical portion 1123 are both cylindrical and coaxially arranged. The first outer cylindrical portion 1113 is at least partially inserted into the second outer cylindrical portion 1123, and is sealed at the joint between the two portions to prevent liquid from flowing out of the gap between the two portions. The second cylindrical portion 1122 is provided with a lock protrusion 1128 protruding outwardly. In the illustrated embodiment of the present application, the lock protrusion 1128 is a complete protrusion.

[0073] The cover plate 1121 is provided with a circular hole 1124 through which the first cylindrical portion 1112 extends upwardly. The cover plate 1121 is provided with a slot 1125 outside the circular hole 1124, which connects the inner cavity of the second outer cylindrical portion 1123 with the inner cavity of the second cylindrical portion 1122 to form a second liquid inlet passage 1129. The second liquid inlet passage 1129 is in selective communication with the liquid inlet cavity 1110, i.e., when the liquid distribution valve plate 14 is in a certain position, the second liquid inlet passage 1129 is in communication with the liquid inlet cavity 1110; when the liquid distribution valve plate 14 is in another position, the second liquid inlet passage 1129 is not in communication with the liquid inlet cavity 1110. In addition, the cover plate 1121 is further provided with a first through hole 1126 cooperating with the first connecting protrusion 1116 and a second through hole 1127 cooperating with the second connecting protrusion 1117. The first connecting protrusion 1116 and the second connecting protrusion 1117 extend upwardly beyond the cover plate 1121.

[0074] As shown in Figure 14 and Figure 15As shown in the illustrated embodiment of the present application, the first spray arm 2 comprises a first liquid outlet 21, a first sleeve 22 connected to the first liquid outlet 21, a second liquid outlet 23, a second sleeve 24 connected to the second liquid outlet 23, and a rotating locking arm 25 connected to the second liquid outlet 23. In the present embodiment, the first liquid outlet 21 is the upper first spray arm, and the second liquid outlet 23 is the lower second spray arm. In the illustrated embodiment of the present application, the first sleeve 22 extends downward from the first liquid outlet 21, and the second sleeve 24 extends downward from the second liquid outlet 23. The rotating locking arm 25 is two and extends downward from the second liquid outlet 23. The first sleeve 22 is cylindrical, and the second sleeve 24 is conical.

[0075] The first liquid outlet 21 and the second liquid outlet 23 are fixedly connected and cross-shaped to expand the cleaning range. The first liquid outlet 21 and the second liquid outlet 23 can be fixedly connected by, for example, welding or other means. In the illustrated embodiment of the present application, the second liquid outlet 23 is below the first liquid outlet 21, i.e., the second liquid outlet 23 is at the bottom of the first liquid outlet 21 when installed. The first liquid outlet 21 is provided with a first spray hole 211, and the second liquid outlet 23 is provided with a second spray hole 231. The first liquid outlet 21 and the second liquid outlet 23 have independent water flow paths to facilitate independent control.

[0076] Specifically, referring to Figure 4 and Figure 10 As shown, the first sleeve 22 extends downward beyond the second sleeve 24, i.e., the first sleeve 22 extends downward beyond the second sleeve 24. The first sleeve 22 is provided with a first connecting channel 221 connected to the first spray hole 211. The first sleeve 22 is inserted into the first cylinder portion 1112, so that the first connecting channel 221 is in communication with the first liquid inlet channel 1115. In the illustrated embodiment of the present application, the first sleeve 22 is at least partially inserted into the first cylinder portion 1112. The connection between the first sleeve 22 and the first cylinder portion 1112 is sealed, for example, by a sealing ring, to prevent water leakage.

[0077] The second sleeve 24 is at least partially inserted into the second cylinder portion 1122. In the embodiment shown in the drawings, the second sleeve 24 is coaxial with the first sleeve 22, and the diameter of the first sleeve 22 is smaller than that of the second sleeve 24. The spray arm mechanism comprises a second connecting passage 241 between the second sleeve 24 and the first sleeve 22, the second connecting passage 241 being in communication with the second spray hole 231, and the second connecting passage 241 being in communication with the slotted portion 1125.

[0078] The rotating locking arm 25 is located outside the second sleeve 24 and is locked with the locking protrusion 1128 to prevent the rotating locking arm 25 from being separated upward from the second cylinder portion 1122. In the embodiment shown in the drawings, the locking protrusion 1128 is provided as a complete circle, which is beneficial to the smooth rotation of the rotating locking arm 25. Those skilled in the art can understand that the first liquid outlet portion 21 and the second liquid outlet portion 23 in the present application can be linked together under the driving of water, so that the first spray arm 2 is rotated, and multi-angle and dead-angle-free spraying is easily achieved. The first spray arm 2 can spray water upward through the first spray hole 211 and / or the second spray hole 231 while rotating, so as to clean the dishes.

[0079] In the embodiment shown in the drawings, the size of the first opening 141 of the distribution valve 14 is slightly larger than the diameter of the bottom of the second sleeve 24, so as to ensure the water passing area. When the distribution valve 14 is located at another position, the size of the second opening 142 is slightly smaller than the diameter of the bottom of the first sleeve 22, so as to prevent water from jumping.

[0080] The distribution valve 14 is rotated under the action of the driving element 13. Specifically, as shown in Figures 4 to 7 and Figure 10 When the first opening 141 of the distribution valve 14 is in communication with the first spray arm 2, i.e., the first opening 141 is rotated to be aligned with the second sleeve 24 upward and downward, the liquid inlet cavity 1110 is in communication with the first liquid inlet passage 1115 and the second liquid inlet passage 1129 through the first opening 141. At this time, the first sleeve 22 and the second sleeve 24 simultaneously spray water, so that the first liquid outlet portion 21 and the second liquid outlet portion 23 simultaneously spray water, which increases the water spraying efficiency and is beneficial to shorten the cleaning time.

[0081] Please refer to Figure 5 , Figure 6 , Figure 8 and Figure 11As shown, when the second opening 142 of the distribution valve 14 is in communication with the first spray arm 2, i.e. the second opening 142 is rotated to be aligned with the first sleeve 22 vertically, the liquid inlet cavity 1110 is in communication with the first liquid inlet passage 1115 through the second opening 142; the second liquid inlet passage 1129 is not in communication with the liquid inlet cavity 1110 under the shielding of the distribution valve 14. At this time, only the first sleeve 22 of the first sleeve 22 and the second sleeve 24 is water outlet, i.e. only the first liquid outlet 21 of the first liquid outlet 21 and the second liquid outlet 23 sprays water, which is conducive to water saving.

[0082] Please refer to Figure 1 , Figure 3 , Figure 4 , Figure 12 and Figure 13 , the spray arm mechanism further comprises a connecting joint 5 and a fifth connecting passage 61 and a third connecting passage 62 in communication with the connecting joint 5. The connecting joint 5 comprises a first connecting end 51 and a second connecting end 52 connected with the first connecting protrusion 1116 and the second connecting protrusion 1117 respectively. The fifth connecting passage 61 and the third connecting passage 62 are arranged side by side. In the embodiment of the present application, the flow cross section of the third connecting passage 62 is larger than that of the fifth connecting passage 61, so as to facilitate the distribution.

[0083] The second spray arm 3 comprises a third upper spray hole 31 and a fourth lower spray hole 32, which are respectively in communication with the respective flow channels. Specifically, the fifth connecting passage 61 is in communication with the fourth lower spray hole 32, one way of the third connecting passage 62 is in communication with the third upper spray hole 31, and the other way is in communication with the third spray arm 4. The fifth connecting passage 61 and / or the third connecting passage 62 is selectively communicated with the liquid inlet cavity 1110 through the distribution valve 14. Please refer to Figure 13As shown, in one embodiment of the present application, when the distribution valve piece 14 is rotated to the position shown in the figure, the third opening hole 143 is aligned with the passage 1118 of the second connecting protrusion 1117, at this time the liquid inlet cavity 1110 flows into the third connecting passage 62 through the third opening hole 143, enabling the third upper spray hole 31 of the second spray arm 3 to spray water, and the fifth lower spray hole 41 of the third spray arm 4 to spray water. Of course, in other embodiments, when the distribution valve piece 14 is rotated to a position such that the third opening hole 143 is aligned with the passage 1118 of the first connecting protrusion 1116, at this time the liquid inlet cavity 1110 flows into the fifth connecting passage 61 through the third opening hole 143, enabling the fourth lower spray hole 32 of the second spray arm 3 to spray water. When the distribution valve piece 14 is rotated to a position such that the third opening hole 143 is aligned with the passage 1118 of the first connecting protrusion 1116 and the passage 1118 of the second connecting protrusion 1117, the third upper spray hole 31 and the fourth lower spray hole 32 of the second spray arm 3 can spray water simultaneously, and the fifth lower spray hole 41 of the third spray arm 4 can also spray water.

[0084] Those skilled in the art can understand that the first liquid outlet part 21 of the first spray arm 2, the second liquid outlet part 23 of the first spray arm 2, the third upper spray hole 31 of the second spray arm 3, the fourth lower spray hole 32 of the second spray arm 3, and the fifth lower spray hole 41 of the third spray arm 4 in the present application can be freely combined to achieve selective spraying. The spray arm mechanism of the present application can effectively solve the problem of cleaning dead angles without increasing water consumption, and can also shorten the cleaning time of the entire machine and improve the cleaning efficiency of the dishwasher.

[0085] Please refer to Figure 17 As shown, in one embodiment of the present application, the spray arm mechanism further comprises a liquid distribution pipe 7 connected to the second spray arm 3. The liquid distribution pipe 7 comprises a first flow channel 711 connected to the fourth lower spray hole 32 and a second flow channel 712 connected to the third upper spray hole 31. In Figure 17In the shown embodiment, the liquid distribution pipe 7 is one pipe, and the first flow channel 711 and the second flow channel 712 are two independent internal flow channels of the liquid distribution pipe 7. The first flow channel 711 is in communication with the fifth connecting channel 61, and the second flow channel 712 is in communication with the third connecting channel 62. Specifically, in an embodiment of the present application, the spray arm mechanism further comprises a liquid distribution pipe assembly 8 connected to the liquid distribution pipe 7, the liquid distribution pipe assembly 8 comprising a first insertion hole 81 in communication with the first flow channel 711 and a second insertion hole 82 in communication with the second flow channel 712. The fifth connecting channel 61 is provided with a first joint 611 inserted into the first insertion hole 81, and the third connecting channel 62 is provided with a second joint 621 inserted into the second insertion hole 82.

[0086] Please refer to Figures 18 to 24 In another embodiment of the present application, as shown in the figure, the liquid distribution pipe 7 comprises a first liquid distribution pipe 71 and a second liquid distribution pipe 72 connected to the second spray arm 3. The first liquid distribution pipe 71 and the second liquid distribution pipe 72 are arranged side by side. The first liquid distribution pipe 71 comprises a first flow channel 711 in communication with the fourth lower spray hole 32, and the second liquid distribution pipe 72 comprises a second flow channel 712 in communication with the third upper spray hole 31. The first flow channel 711 and the second flow channel 712 are two relatively independent flow channels. The first flow channel 711 is in communication with the fifth connecting channel 61, and the second flow channel 712 is in communication with the third connecting channel 62. Please refer to Figure 19 As shown in the figure, the first liquid distribution pipe 71 and the second liquid distribution pipe 72 are arranged eccentrically. Please refer to Figure 20 As shown in the figure, the second spray arm 3 comprises a first perforation 33 in selective communication with the third upper spray hole 31 and a second perforation 34 in selective communication with the fourth lower spray hole 32. The first perforation 33 is located inside the second perforation 34. Specifically, the first perforation 33 is arranged along a first diagonal line D1, and the second perforation 34 is arranged along a second diagonal line D2 intersecting the first diagonal line D1, so as to avoid eccentricity when the second spray arm 3 rotates. The second flow channel 712 is in selective communication with the three upper spray holes 31 of the second spray arm 3 through the first perforation 33, and the first flow channel 711 is in selective communication with the fourth lower spray hole 32 of the second spray arm 3 through the second perforation 34.

[0087] Specifically, in one embodiment of the present application, the spray arm mechanism further comprises a liquid distribution pipe assembly 8 connected to the first liquid distribution pipe 71 and the second liquid distribution pipe 72. The spray arm mechanism further comprises a liquid distributor 9 connected to the fifth connecting channel 61 and the third connecting channel 62. The liquid distribution pipe assembly 8 comprises a plurality of first insertion holes 81 in communication with the first flow channel 711 and a plurality of second insertion holes 82 in communication with the second flow channel 712. In the illustrated embodiment of the present application, the plurality of first insertion holes 81 and the plurality of second insertion holes 82 are arranged in a matrix as a whole. Specifically, the plurality of first insertion holes 81 comprises a first upper insertion hole 811, a first middle insertion hole 812 and a first lower insertion hole 813; and the plurality of second insertion holes 82 comprises a second upper insertion hole 821, a second middle insertion hole 822 and a second lower insertion hole 823. The first insertion holes 81 and the second insertion holes 82 aligned in the left-right direction form a group, i.e. the first upper insertion hole 811 and the second upper insertion hole 821 form a group, the first middle insertion hole 812 and the second middle insertion hole 822 form a group, and the first lower insertion hole 813 and the second lower insertion hole 823 form a group.

[0088] The liquid distributor 9 comprises a first insertion head 91 inserted into the corresponding first insertion hole 81 and a second insertion head 92 inserted into the corresponding second insertion hole 82. In addition, the liquid distributor 9 further comprises a first upper plug 93 located above the first insertion head 91, a first lower plug 94 located below the first insertion head 91, a second upper plug 95 located above the second insertion head 92, and a second lower plug 96 located below the second insertion head 92. In the illustrated embodiment of the present application, the first upper plug 93 and the second upper plug 95 are aligned in the left-right direction and form a group; the first insertion head 91 and the second insertion head 92 are aligned in the left-right direction and form a group; and the first lower plug 94 and the second lower plug 96 are aligned in the left-right direction and form a group. The first upper plug 93, the second upper plug 95, the first insertion head 91, the second insertion head 92, the first lower plug 94 and the second lower plug 96 all protrude towards the liquid distribution pipe assembly 8 and are arranged in a matrix as a whole. The liquid distributor 9 is detachably connected to the liquid distribution pipe assembly 8. In the illustrated embodiment of the present application, a sealing ring is sleeved on each of the first insertion head 91 and the second insertion head 92 to improve the sealing performance after assembly and prevent water leakage.

[0089] In the illustrated embodiment of the present application, the position of the liquid distribution pipe assembly 8 can be adjusted up and down, thereby driving the bowl basket of the dishwasher to be adjusted up and down.

[0090] Please refer to Figure 23As shown, when the liquid preparation pipe assembly 8 is located at a certain height position (at this time, the basket is at a normal height position), the first plug-in head 91 and the second plug-in head 92 are respectively inserted into the first upper insertion hole 811 and the second upper insertion hole 821, the first lower plug 94 and the second lower plug 96 are respectively inserted into the first middle insertion hole 812 and the second middle insertion hole 822, and the first upper plug 93 and the second upper plug 95 are empty (that is, not inserted into the liquid preparation pipe assembly 8). At this time, the first upper insertion hole 811 and the second upper insertion hole 821 are conductive, the first middle insertion hole 812 and the second middle insertion hole 822 are not conductive, and the first lower insertion hole 813 and the second lower insertion hole 823 are not conductive. By inserting the first lower plug 94 and the second lower plug 96 into the first middle insertion hole 812 and the second middle insertion hole 822 respectively, the stability of the liquid preparation pipe assembly 8 and the liquid preparation pipe assembly 8 is improved, and a certain positioning effect is also achieved.

[0091] Please refer to Figure 24 As shown, when the liquid preparation pipe assembly 8 is located at a certain height position (at this time, the basket is at a normal height position), the first plug-in head 91 and the second plug-in head 92 are respectively inserted into the first upper insertion hole 811 and the second upper insertion hole 821, the first lower plug 94 and the second lower plug 96 are respectively inserted into the first middle insertion hole 812 and the second middle insertion hole 822, and the first upper plug 93 and the second upper plug 95 are empty (that is, not inserted into the liquid preparation pipe assembly 8). At this time, the first upper insertion hole 811 and the second upper insertion hole 821 are conductive, the first middle insertion hole 812 and the second middle insertion hole 822 are not conductive, and the first lower insertion hole 813 and the second lower insertion hole 823 are not conductive. By inserting the first lower plug 94 and the second lower plug 96 into the first middle insertion hole 812 and the second middle insertion hole 822 respectively, the stability of the liquid preparation pipe assembly 8 and the liquid preparation pipe assembly 8 is improved, and a certain positioning effect is also achieved.

[0092] In addition, in order to further improve the convenience of the connection between the liquid preparation device 9 and the liquid preparation pipe assembly 8, the liquid preparation device 9 and the liquid preparation pipe assembly 8 are further provided with a guide column 97 and a guide groove 83 which are matched with each other. In the embodiment shown in the drawings, the guide column 97 is arranged on the liquid preparation device 9, and the guide groove 83 is arranged on the liquid preparation pipe assembly 8. Of course, in other embodiments, the guide column 97 can be arranged on the liquid preparation pipe assembly 8, and the guide groove 83 can be arranged on the liquid preparation device 9, and the guiding effect can also be achieved when the two are matched. The design of the guide column 97 and the guide groove 83 can be flexibly adjusted according to actual needs, and the present application will not be described again.

[0093] In order to facilitate the understanding of the technical solutions of the present application, the first spray arm 2, the second spray arm 3 and the third spray arm 4 are also referred to as lower spray arm, middle spray arm, upper spray arm, spray arm or rotary spray arm.

[0094] The above embodiments are only used to illustrate the technical solutions described in the present application and not to limit the technical solutions described in the present application. The understanding of the present application should be based on the skilled person in the art. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the skilled person in the art can still modify or equivalently replace the present application, and all technical solutions and improvements which do not deviate from the spirit and scope of the present application should be covered in the scope of the claims of the present application.

Claims

1. A spray arm mechanism, characterized by, The utility model relates to a liquid distribution assembly, comprising: A liquid distribution assembly (1) comprising a housing (11), a liquid distribution part, and a liquid inlet cavity (1110) in the housing (11); a first spray arm (2) connected to the housing (11), comprising a first liquid outlet part (21), a first connecting channel (221) connected to the first liquid outlet part (21), a second liquid outlet part (23), and a second connecting channel (241) connected to the second liquid outlet part (23); a second spray arm (3) connected to the housing (11), comprising a third liquid outlet part, a third connecting channel (62) connected to the third liquid outlet part, a fourth liquid outlet part, and a first liquid mixing pipe (71) connected to the fourth liquid outlet part; a third spray arm (4) connected to the housing (11), comprising a fifth liquid outlet part, a fifth connecting channel (61) connected to the fifth liquid outlet part, and a first liquid mixing pipe (71) connected to the fifth connecting channel (61); wherein the liquid distribution assembly (1) has a first state in which the first connecting channel (221), the second connecting channel (241), and the fifth connecting channel (61) are all connected to the liquid inlet cavity (1110), a second state in which the second connecting channel (241) is connected to the liquid inlet cavity (1110), and a third state in which the third connecting channel (62) is connected to the liquid inlet cavity (1110).

2. The spray arm mechanism of claim 1, wherein: The liquid distribution part comprises a liquid distribution valve plate (14) and a driving element (13) for driving the liquid distribution valve plate (14) to rotate, the liquid distribution valve plate (14) is provided with a first opening (141) and a third opening (143), wherein when the driving element (13) drives the liquid distribution valve plate (14) to rotate to a state in which the first opening (141) is connected to the first connecting channel (221) and the second connecting channel (241), and the third opening (143) is connected to the fifth connecting channel (61), the liquid distribution assembly (1) is in the first state; when the driving element (13) drives the liquid distribution valve plate (14) to rotate to a state in which the third opening (143) is connected to the third connecting channel (62), the liquid distribution assembly (1) is in the third state.

3. The spray arm mechanism of claim 2, wherein: The liquid distribution valve plate (14) is further provided with a second opening (142), the size of the first opening (141) is larger than that of the second opening (142); wherein when the driving element (13) drives the liquid distribution valve plate (14) to rotate to a state in which the second opening (142) is connected to the second connecting channel (241), the liquid distribution assembly (1) is in the second state.

4. The spray arm mechanism of claim 3, wherein: The spray arm mechanism further has a fourth state in which a first connecting channel (221), a second connecting channel (241), a third connecting channel (62), and a fifth connecting channel (61) are in communication with the liquid inlet cavity (1110), and the distribution valve disc (14) is further provided with a fourth opening; the drive element (13) drives the distribution valve disc (14) to rotate to a state in which the first opening (141) is in communication with the first connecting channel (221) and the second connecting channel (241), the third opening (143) is in communication with the fifth connecting channel (61), and the fourth opening is in communication with the third connecting channel (62), and the distribution assembly (1) is in the fourth state.

5. A spray arm mechanism as claimed in any one of claims 1 to 4, wherein: The fifth liquid outlet portion includes at least one fifth lower spray hole (41) in communication with the fifth connecting channel (61).

6. A spray arm mechanism as claimed in any one of claims 1 to 4, wherein: The third liquid outlet portion includes at least one third liquid outlet cavity and at least one third upper spray hole (31) in communication with the third liquid outlet portion; the third liquid outlet cavity is provided with a first perforation (33), and the third liquid outlet cavity is in communication with the second liquid preparation pipe (72) through the first perforation (33). The third liquid outlet portion includes at least one fourth liquid outlet cavity and at least one fourth lower spray hole (32) in communication with the fourth liquid outlet cavity; the fourth liquid outlet cavity is provided with a second perforation (34), and the fourth liquid outlet cavity is in communication with the first liquid preparation pipe (71) through the second perforation (34).

7. The spray arm mechanism of claim 6, wherein: The first perforation (33) is located inside the second perforation (34), the first perforation (33) is arranged along a first diagonal line (D1), and the second perforation (34) is arranged along a second diagonal line (D2) intersecting the first diagonal line (D1).

8. The spray arm mechanism of claim 6, wherein: The spray arm mechanism includes a liquid preparation pipe assembly (8) connected to the first liquid preparation pipe (71) and the second liquid preparation pipe (72); the liquid preparation pipe assembly (8) includes a first insertion hole (81) in communication with the first liquid preparation pipe (71) and a second insertion hole (82) in communication with the second liquid preparation pipe (72); the spray arm mechanism further includes a liquid preparation device (9) matched with the liquid preparation pipe assembly (8); the liquid preparation device (9) includes a first plug (91) and a second plug (92), wherein the first plug (91) is plugged into the first insertion hole (81), and the second plug (92) is plugged into the second insertion hole (82).

9. A spray arm mechanism as claimed in any one of claims 2 to 4, wherein: The first liquid outlet portion (21) includes a first liquid outlet cavity and at least one first spray hole (211) in communication with the first liquid outlet cavity, and the first liquid outlet cavity is in communication with the first connecting channel (221); the second liquid outlet portion includes a second liquid outlet cavity and at least one second spray hole (231) in communication with the second liquid outlet cavity, and the second liquid outlet cavity is in communication with the second connecting channel (241).

10. The spray arm mechanism of claim 9, wherein: The first spray arm (2) comprises a first sleeve (22) connected with the first liquid outlet cavity, and the second connecting channel (241) is arranged in the first sleeve (22); the shell (11) is provided with a first cylinder portion (1112), and the first cylinder portion (1112) comprises a first liquid inlet channel (1115); the first sleeve (22) is inserted into the first cylinder portion (1112) to make the first connecting channel (221) communicate with the first liquid inlet channel (1115), wherein when the driving element (13) drives the distribution valve disc (14) to rotate to the second opening (142) to communicate with the first liquid inlet channel (1115), the distribution assembly (1) is in the second state.

11. The spray arm mechanism of claim 10, wherein: The shell (11) comprises a cover plate (1121) and a second cylinder portion (1122) extending upward from the cover plate (1121), the first spray arm (2) comprises a second sleeve (24) connected with the second liquid outlet cavity, the second sleeve (24) is at least partially inserted into the second cylinder portion (1122), the second sleeve (24) is coaxial with the first sleeve (22), the pipe diameter of the first sleeve (22) is smaller than the pipe diameter of the second sleeve (24), and the second connecting channel (241) communicates with the second liquid outlet cavity.

12. The spray arm mechanism of claim 11, wherein: The first cylinder portion (1112) extends upward through the cover plate (1121), the cover plate (1121) is provided with a slot (1125) communicating with the second connecting channel (241), and the distribution assembly (1) comprises a second liquid inlet channel (1129) communicating with the slot (1125); wherein when the driving element (13) drives the distribution valve disc (14) to rotate to the first opening (141) to align and communicate with the second liquid inlet channel (1129), the distribution assembly (1) is in the first state.

13. The spray arm mechanism of claim 12, wherein: The size of the first opening (141) is slightly larger than the pipe diameter of the bottom of the second sleeve (24), and the size of the second opening (142) is slightly smaller than the pipe diameter of the bottom of the first sleeve (22).

14. A cleaning apparatus, characterized by The spray arm mechanism comprises the distribution assembly as claimed in any one of claims 1 to 13.

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