A water-residue-free structure for spray arm of dishwasher

Abstract

The present invention relates to a spray arm water-residue-free structure for a dishwasher, comprising an inner water pipe and a spray arm assembly; the spray arm assembly comprises a middle spray arm and an extension pipe; the rear end of the extension pipe is detachably connected to the inner water pipe, and the front end is tilted downward along its water outlet direction and is detachably connected to the middle spray arm. The extension pipe of this structure is tilted downward along its water outlet direction, so that the washing water inside it can flow toward the lower front end by its own gravity, and finally flow out from the middle spray arm, so as to reduce the problem of washing water remaining inside the middle spray arm and the extension pipe, and further ensure that there is no residual water inside the middle spray arm and the extension pipe when the dishwasher stops working, so as to improve the washing performance and hygiene of the dishwasher, enhance the user experience, and have strong practicality.

Description

Technical Field

[0001] The invention relates to a dishwasher, in particular to a water-residue-free structure for a spray arm of the dishwasher. Background Art

[0002] The Chinese patent document number CN203597919U disclosed a dishwasher spray arm assembly and a dishwasher on May 21, 2014, wherein the spray arm body comprises a spray arm body and a water outlet pipe connected by a connecting structure, the spray arm body is provided with a spray chamber, a water inlet and a spray hole connected with the spray chamber, the spray arm connecting end of the connecting structure extends into the spray arm body and is rotatably connected with the spray arm body, the spray arm connecting end is provided with a positioning hole, and the spray arm body is provided with a positioning pin coaxial with the rotation center line of the spray arm body and matched with the positioning hole. The water outlet pipe of the above structure is arranged horizontally, and when the dishwasher stops working, the washing water inside the water outlet pipe cannot be completely sprayed out from the spray arm body, resulting in part of the washing water remaining inside the water outlet pipe, which not only affects the washing performance and hygiene of the dishwasher, but also when the user pulls out the middle basket of the dishwasher, the washing water remaining in the water outlet pipe will flow to the spray arm body due to external force and drip onto the tableware in the lower basket, causing pollution to the washed tableware and affecting the user's experience. Therefore, further improvement is necessary. Summary of the invention

[0003] The object of the present invention is to provide a spray arm water-residue-free structure for a dishwasher to overcome the deficiencies in the prior art.

[0004] A water-residue-free structure for the spray arm of a dishwasher designed for this purpose comprises an inner water pipe and a spray arm assembly, and is characterized in that the spray arm assembly comprises a middle spray arm and an extension pipe; the rear end of the extension pipe is detachably connected to the inner water pipe, and the front end of the extension pipe is inclined downward along the water outlet direction and is detachably connected to the middle spray arm.

[0005] An extension pipe water outlet is arranged downward at the front end of the extension pipe; a slope correction part is arranged at the extension pipe water outlet corresponding to the inclination angle of the extension pipe, and the slope correction part is detachably connected with the middle spray arm to realize horizontal rotation of the middle spray arm.

[0006] The bottom of the slope correction part is horizontally arranged, and has a threaded part extending longitudinally, and a threaded part is threadedly disassembled through the threaded part; the middle spray arm is threadedly disassembled and connected with the water outlet of the extension pipe through the threaded part.

[0007] A self-locking portion is provided between the slope correction portion and the threaded member, and the two are locked in an anti-dropping manner by the self-locking portion.

[0008] The self-locking portion comprises a locking protrusion and a locking matching position in a wave shape or a tooth shape.

[0009] The locking protrusion is arranged at the bottom of the slope correction part, and the locking matching position is arranged at the top of the threaded member, or the locking matching position is arranged at the bottom of the slope correction part, and the locking protrusion is arranged at the top of the threaded member.

[0010] The threaded member is locked on the slope correction portion in an anti-slip manner through the cooperation of the locking protrusion and the locking cooperation position.

[0011] The middle spray arm is also rotatably connected to an adapter; the adapter is threadedly detachably connected to the threaded member; the middle spray arm is threadedly detachably connected to the water outlet of the extension pipe through the cooperation of the adapter and the threaded member; a through hole is also provided at the bottom of the middle spray arm.

[0012] An extension pipe water collecting portion is arranged at the inner bottom of the extension pipe; the radial cross section of the extension pipe water collecting portion is V-shaped or U-shaped, and is arranged to be inclined downward along the water outlet direction of the extension pipe.

[0013] The inner water pipe is also provided with a water distribution seat with a detachable sealing card; a water distribution seat water outlet is provided at the bottom of the front end of the water distribution seat; a water distribution seat water collecting part is provided on the water distribution seat water outlet; the cross-sectional shape of the water distribution seat water collecting part is the same as the cross-sectional shape of the extension tube water collecting part; the extension tube detachable seal is provided on the water distribution seat water outlet, and is connected with the water distribution seat water collecting part through the extension tube water collecting part.

[0014] The water collecting portion of the water distribution seat is arranged to be tilted downward along the water outlet direction of the water distribution seat outlet, and is butted against the water collecting portion of the extension pipe in a planar manner.

[0015] A front boss is provided on the water outlet of the water distribution seat; a clamping portion is provided on the outer wall of the front boss, and a sealing member is connected to the positioning sleeve; a clamping fitting portion is provided at the rear end of the extension tube; the front boss is inserted into the rear end of the extension tube, and is clamped on the clamping fitting portion through the clamping portion, and seals on the inner wall of the rear end of the extension tube through the sealing member, so as to realize the sealed connection between the water outlet of the water distribution seat and the extension tube.

[0016] The present invention has the following advantages compared with the prior art through the improvement of the above structure:

[0017] 1. The extension pipe is tilted downward along its water outlet direction so that the washing water inside it can use its own gravity to flow toward the water outlet of the extension pipe at the lower front end, and finally flow out from the middle spray arm, so as to reduce the problem of residual washing water in the middle spray arm and the extension pipe, and further ensure that there is no residual water in the middle spray arm and the extension pipe when the dishwasher stops working, so as to improve the washing performance and hygiene of the dishwasher and enhance the user experience.

[0018] 2. The water outlet of the extension tube is corrected at an angle corresponding to the inclination angle of the extension tube, and the inclination correction part is provided to ensure that the water outlet direction of the water outlet of the extension tube can be perpendicular to the horizontal plane, thereby ensuring that the middle spray arm connected with the inclination correction part can realize horizontal rotation, effectively avoiding the middle spray arm from shaking and deviating during rotation due to inclination during assembly, and easily flying off from the extension tube, causing damage to the dishwasher or tableware, injury to users and a series of safety hazards, so as to ensure that the middle spray arm can be stably connected to the extension tube, thereby improving the safety of dishwasher use.

[0019] 3. The inclination correction part and the threaded member are locked together to prevent slipping through the self-locking part, thereby effectively ensuring that the middle spray arm will not be loosened from the extension tube due to the hot and cold changes in the washing water temperature during the rotation process, so as to further improve the safety of the dishwasher. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the decomposed structure of an embodiment of the present invention.

[0021] Figure 2 It is a schematic diagram of the assembly structure of an embodiment of the present invention.

[0022] Figure 3 It is a schematic diagram of the assembly cross-sectional structure of an embodiment of the present invention.

[0023] Figure 4 It is a schematic diagram of the assembly structure of the extension pipe and the water distribution seat according to one embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the exploded structure of the extension pipe and the water distribution seat according to an embodiment of the present invention.

[0025] Figure 6 , Figure 7 This is a schematic diagram of the assembly structure of a spray arm assembly according to an embodiment of the present invention.

[0026] Figure 8 for Figure 3 A in the figure is an enlarged structural diagram.

[0027] Fig. 9 , Fig.10 This is a schematic diagram of the exploded structure of a spray arm assembly according to an embodiment of the present invention (partially enlarged). DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0029] See also Figure 1-Figure 10The spray arm of the dishwasher has a water-free residual structure, comprising an inner water pipe 1 and a spray arm assembly; the spray arm assembly comprises a middle spray arm 2 and an extension pipe 3; the rear end of the extension pipe 3 is detachably connected to the inner water pipe 1, and the front end is tilted downward along the water outlet direction thereof, and is detachably connected to the middle spray arm 2.

[0030] An extension pipe water outlet 4 is provided downward at the front end of the extension pipe 3; the extension pipe water outlet 4 is provided with a slope correction part 5 corresponding to the inclination angle of the extension pipe 3, and is detachably connected with the middle spray arm 2 through the slope correction part 5 to realize the horizontal rotation of the middle spray arm 2.

[0031] Since the extension tube 3 is tilted downward along its water outlet direction, the washing water inside it can use its own gravity to flow toward the extension tube outlet 4 located at the low front end, and finally flow out from the middle spray arm 2, so as to reduce the problem of washing water remaining inside the middle spray arm 2 and the extension tube 3, thereby ensuring that there is no residual water inside the middle spray arm 2 and the extension tube 3 when the dishwasher stops working, so as to improve the washing performance and hygiene of the dishwasher and enhance the user experience.

[0032] Moreover, the extension tube water outlet 4 is corrected at an angle corresponding to the inclination angle of the extension tube 3, and the inclination correction part 5 is provided to ensure that the water outlet direction of the extension tube water outlet 4 can be perpendicular to the horizontal plane, thereby ensuring that the middle spray arm 3 connected with the inclination correction part 5 can achieve horizontal rotation, effectively avoiding the middle spray arm 2 from shaking and deviating during rotation due to the inclination during assembly, and easily flying off from the extension tube 3, causing damage to the dishwasher or tableware, injury to the user and a series of safety hazards, to ensure that the middle spray arm 2 can be stably connected to the extension tube 3, thereby improving the safety of the dishwasher.

[0033] Furthermore, the bottom of the slope correction part 5 is horizontally arranged and has a threaded part 6 extending longitudinally, and a threaded member 7 is threadedly disassembled through the threaded part 6; the middle spray arm 2 is threadedly disassembled and connected to the extension pipe water outlet 4 through the threaded member 7.

[0034] like Figure 5 As shown, in this embodiment, the outer end thickness of the top of the slope correction part 5 is smaller, and the rear end thickness is larger, so that the bottom of the slope correction part 5 is parallel to the horizontal plane, ensuring that the threaded member 7 can handle the horizontal state after threaded connection.

[0035] A self-locking portion is provided between the inclination correction portion 5 and the threaded member 7, and the two are locked together by the self-locking portion to prevent disengagement, thereby effectively ensuring that the middle spray arm 2 will not be loosened from the extension tube 3 due to the hot and cold changes in the washing water temperature during the rotation process, so as to further improve the safety of the dishwasher.

[0036] Furthermore, the self-locking portion includes a locking protrusion 8 and a locking matching position 9 in a wave shape or a tooth shape.

[0037] The locking protrusion 8 is arranged at the bottom of the slope correction part 5, and the locking matching position 9 is arranged at the top of the threaded member 7. In addition, the positions of the locking protrusion 8 and the locking matching position 9 can be interchanged, that is, the locking matching position 9 is arranged at the bottom of the slope correction part 5, and the locking protrusion 8 is arranged at the top of the threaded member 7.

[0038] The threaded member 7 is locked on the slope correction portion 5 in an anti-slip manner through the cooperation of the locking protrusion 8 and the locking cooperation position 9 .

[0039] The cooperation between the locking protrusion 8 and the locking matching position 9 not only ensures the assembly stability of the middle spray arm 2, but also the locking protrusion 8 and the locking matching position 9 can emit a prompt sound when they are matched, so that the user can perceive through the sound that the threaded part 7 has been assembled in place, thereby improving the user's experience.

[0040] The middle spray arm 2 is also rotatably connected with an adapter 10; the adapter 10 is threadedly detachably connected to the threaded member 7; the middle spray arm 2 is threadedly detachably connected to the extension pipe water outlet 4 through the cooperation of the adapter 10 and the threaded member 7.

[0041] The bottom of the middle spray arm 2 is also provided with a through hole 18, and the surface is also provided with a water spray hole 19; the water spray holes 19 are provided in a plurality and are evenly distributed on the surface of the middle spray arm 2, and the plurality of water spray holes 19 can spray washing water when the dishwasher is working, so as to spray and wash the dishes in the dishwasher. At least one through hole 18 is provided and is located outside the bottom of the middle spray arm 2; the through hole 18 can spray washing water when the dishwasher is working, so as to assist in washing dishes and improve the washing performance of the dishwasher; because the through hole 18 is located at the bottom of the middle spray arm 2, when the dishwasher stops working, the washing water in the middle spray arm 2 and the extension pipe 3 can flow downward from the through hole 18 to ensure that there is no washing water residue in the middle spray arm 2 and the extension pipe 3.

[0042] In order to further improve the water outlet effect, an extension tube water collecting portion 11 is provided at the inner bottom of the extension tube 3 ; the radial cross section of the extension tube water collecting portion 11 is V-shaped or U-shaped, and is tilted downward along the water outlet direction of the extension tube 3 .

[0043] The inner water pipe 1 is also provided with a water distribution seat 12 in a detachable sealing manner; a water distribution seat water outlet 13 is provided at the front end bottom of the water distribution seat 12; a water distribution seat water collecting part 14 is provided on the water distribution seat water outlet 13; the cross-sectional shape of the water distribution seat water collecting part 14 is the same as the cross-sectional shape of the extension tube water collecting part 11; the extension tube 3 is detachably sealed and arranged on the water distribution seat water outlet 13, and is connected to the water distribution seat water collecting part 14 through the extension tube water collecting part 11.

[0044] The cross-sectional shape of the extension pipe water collecting portion 11 and the water distribution seat water collecting portion 14 in this embodiment is the same V-shape, so that the water flowing from the inner water pipe 1 can be collected from the water distribution seat water collecting portion 14, and then flow to the extension pipe water collecting portion 11 for further collection, which not only speeds up the flow speed of the washing water, but also ensures that there will be no residual water inside the middle spray arm 2, the extension pipe 3, and the water distribution seat 12.

[0045] The water collecting portion 14 of the water distribution seat is arranged to be tilted downward along the water outlet direction of the water distribution seat water outlet 13 , and is butted against the water collecting portion 11 of the extension pipe in a planar manner.

[0046] The extension tube water collecting portion 11 and the water distribution seat water collecting portion 14, which are also arranged to be inclined downward, can avoid the problem of residual washing water. At the same time, the two are also connected in a surface shape, which can avoid the problem of accumulation of washing water between the extension tube water collecting portion 11 and the water distribution seat water collecting portion 14, further speed up the flow speed of washing water, and thus improve the washing performance of the dishwasher.

[0047] In order to achieve a stable sealed assembly between the extension tube 3 and the water distribution seat 12, a front boss 15 is provided on the water distribution seat outlet 13; the outer wall of the front boss 15 is provided with a clamping portion, and a sealing member 16 is positioned and sleeved; a clamping fitting portion 17 is provided at the rear end of the extension tube 3; the front boss 15 is inserted at the rear end of the extension tube 3, and is clamped on the clamping fitting portion 17 through the clamping portion, and seals on the inner wall of the rear end of the extension tube 3 through the sealing member 16, so as to achieve a sealed connection between the water distribution seat outlet 13 and the extension tube 3.

[0048] The above is a preferred embodiment of the present invention, which shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may have various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention to be protected, and the scope of the present invention to be protected is defined by the attached claims and their equivalents.

Claims

1. A spray arm water-residue-free structure for a dishwasher, comprising an inner water pipe (1) and a spray arm assembly, characterized in that: The spray arm assembly comprises a middle spray arm (2) and an extension pipe (3); the rear end of the extension pipe (3) is detachably connected to the inner water pipe (1), and the front end is arranged to be tilted downward along the water outlet direction and is detachably connected to the middle spray arm (2); The front end of the extension pipe (3) is provided with an extension pipe water outlet (4) pointing downward; the extension pipe water outlet (4) is provided with a slope correction part (5) corresponding to the inclination angle of the extension pipe (3), and is detachably connected to the middle spray arm (2) through the slope correction part (5) to achieve horizontal rotation of the middle spray arm (2); The bottom of the slope correction portion (5) is arranged horizontally and has a threaded portion (6) extending longitudinally, and a threaded component (7) is threadedly disassembled through the threaded portion (6); the middle spray arm (2) is threadedly disassembled and connected to the extension pipe water outlet (4) through the threaded component (7); A self-locking portion is provided between the slope correction portion (5) and the threaded member (7), and the two are locked in an anti-dropout manner by the self-locking portion; The self-locking portion comprises a locking protrusion (8) and a wavy or toothed locking matching position (9); the locking protrusion (8) is arranged at the bottom of the slope correction portion (5), The locking matching position (9) is arranged at the top of the threaded member (7), or the locking matching position (9) is arranged at the bottom of the slope correction portion (5), and the locking convex position (8) is arranged at the top of the threaded member (7); the threaded member (7) is locked on the slope correction portion (5) in an anti-dropping manner by the locking convex position (8) and the locking matching position (9); An extension pipe water collecting portion (11) is provided at the inner bottom of the extension pipe (3); the radial cross section of the extension pipe water collecting portion (11) is V-shaped or U-shaped, and is arranged to be inclined downward along the water outlet direction of the extension pipe (3); The inner water pipe (1) is also provided with a water distribution seat (12) in a detachable sealing manner; the front end bottom of the water distribution seat (12) is provided with a water distribution seat water outlet (13); the water distribution seat water collecting part (14) is provided on the water distribution seat water outlet (13); the cross-sectional shape of the water distribution seat water collecting part (14) is the same as the cross-sectional shape of the extension pipe water collecting part (11); the extension pipe (3) is detachably sealed and arranged on the water distribution seat water outlet (13), and is butt-jointed with the water distribution seat water collecting part (14) through the extension pipe water collecting part (11).

2. The spray arm water-free structure of the dishwasher according to claim 1, characterized in that: The middle spray arm (2) is also rotatably connected to an adapter (10); the adapter (10) is threadedly connected to the threaded member (7); the middle spray arm (2) is threadedly connected to the extension pipe water outlet (4) through the cooperation of the adapter (10) and the threaded member (7); and a through hole (18) is also provided at the bottom of the middle spray arm (2).

3. The spray arm water-free structure of the dishwasher according to claim 1, characterized in that: The water collecting portion (14) of the water distribution seat is arranged to be inclined downward along the water outlet direction of the water distribution seat water outlet (13), and is butted against the water collecting portion (11) of the extension pipe in a planar manner.

4. The spray arm water-free structure of the dishwasher according to claim 1, characterized in that: The water outlet (13) of the water distribution seat is provided with a front convex column (15); the outer wall of the front convex column (15) is provided with a clamping portion, and the positioning sleeve is provided with a sealing member (16); the rear end of the extension tube (3) is provided with a clamping fitting portion (17); the front convex column (15) is inserted into the rear end of the extension tube (3), and is clamped on the clamping fitting portion (17) through the clamping portion, and the sealing member (16) acts on the inner wall of the rear end of the extension tube (3) to achieve sealed communication between the water outlet (13) of the water distribution seat and the extension tube (3).

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