Spray arm assembly and dishwasher

Abstract

The utility model discloses a spray arm assembly, including a spray arm seat, a first spray arm and a second spray arm, wherein the first spray arm is rotatably mounted on the spray arm seat, the first spray arm includes a first spray arm body with a hollow inner cavity and a water retaining member, the first spray arm body is provided with a water inlet, a first spray hole and a second spray hole, the water retaining member is rotatably mounted on the first spray arm body and is located below the first spray hole, when the first spray hole sprays water, the water hits the water retaining member, causing the water retaining member to rotate; at least one second spray arm is rotatably arranged on the first spray arm body, and the second spray arm is provided with a third spray hole. The washing water sprayed from the first spray hole is reflected and dispersed by the water retaining member, the washing water is sprayed farther, the impact force is stronger, and the washing effect is better, the second spray arm can rotate relative to the first spray arm, the spraying areas of the first spray arm and the second spray arm are superimposed, the washing area is expanded, the cleaning dead angle is reduced, and the washing effect is improved as a whole.

Description

Technical Field

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

[0002] Dishwashers are automated devices that automatically clean tableware such as bowls, chopsticks, plates, and dishes. As people's living standards improve, dishwashers are also used by more and more families. They can reduce the labor intensity of users, improve work efficiency, enhance cleanliness and hygiene, and meet the user's comfortable life experience. For dishwashers, by installing the spray arm inside the inner tank, the spray arm is connected to the water path, and the spray holes on the spray arm spray washing water to wash the tableware. The washing area of ​​the spray arm directly affects the cleaning efficiency and cleaning effect of the water flow to wash the tableware.

[0003] Existing spray arms are usually designed in a "straight" shape, with the bottom clamped on the inner tank and rotatable. When working, the spray arm rotates in one direction, and the movement trajectory of the washing water sprayed from the spray hole is a concentric circle. For smaller dishwashers, due to the small space in the inner tank, the "straight" spray arm can cover the entire area when spraying, and can achieve the cleaning effect. However, for dishwashers with larger inner tank space, since the movement trajectory is fixed, the coverage of the spray is limited, it is easy to produce cleaning dead corners, which greatly reduces the washing effect. Utility Model Content

[0004] One of the purposes of the utility model is to provide a spray arm assembly and a dishwasher, so as to solve the technical problems of easy generation of cleaning dead angles and poor washing effect caused by the fixed movement trajectory of the existing spray arm.

[0005] The utility model can realize a spray arm assembly by the following technical scheme:

[0006] A spray arm assembly, comprising a spray arm seat, a first spray arm and a second spray arm, wherein the first spray arm is rotatably mounted on the spray arm seat, the first spray arm comprises a first spray arm body having a hollow inner cavity and a water stopper, the first spray arm body is provided with a water inlet, a first spray hole and a second spray hole, the water stopper is rotatably mounted on the first spray arm body and is located above the first spray hole, when the first spray hole sprays water, the water hits the water stopper, causing the water stopper to rotate;

[0007] At least one of the second spray arms is rotatably disposed on the first spray arm body, and the second spray arm is provided with a third spray hole.

[0008] In one embodiment, the second spray arm is provided with a plurality of spray arm branches interconnected with each other, the third spray hole is opened on the spray arm branch, the second spray arm is connected to the first spray arm body through a connecting shaft, the connecting shaft is provided with a water inlet and a water outlet, the water inlet is clamped on the first spray arm body, and the water outlet is connected with the second spray arm.

[0009] In one embodiment, the connecting shaft is a hollow cone, the second spray arm is sleeved on the connecting shaft, a buckle portion is provided at the lower part of the connecting shaft, a first slot is provided on the first spray arm body, and the buckle portion is clamped in the first slot; a second slot is provided at the top end of the connecting shaft, and a limit piece is buckled in the second slot to restrict the second spray arm to the first spray arm body.

[0010] In one embodiment, the limiting member is provided with a convex portion and a top cover, the top of the second spray arm is provided with a concave step surface, the convex portion is buckled in the second slot, and the edge of the top cover is placed on the step surface.

[0011] In one embodiment, the first spray arm body includes an upper cover and a lower cover, and the upper cover and the lower cover are buckled to form the hollow inner cavity. The edge of the first spray hole is provided with a first guide wall and a water baffle, the guide wall is perpendicular to the bottom of the upper cover, and the water baffle is located on the top of the upper cover.

[0012] In one embodiment, the second injection holes are opened on the side walls at both ends of the upper cover.

[0013] In one embodiment, the third spray hole is provided with a second guide wall, and the second guide wall is inclined with respect to the surface of the second spray arm.

[0014] In one embodiment, the water retaining member is provided with a plurality of blades, each blade having an inwardly concave arc segment, and the inwardly concave direction of the inwardly concave arc segment faces the water retaining plate.

[0015] In one embodiment, a support portion is provided on the first spray arm body, the water blocking member is sleeved on the support portion, and a fixing member is detachably mounted on the support portion.

[0016] The utility model also provides a dishwasher, comprising an inner container and the above-mentioned spray arm assembly, wherein the spray arm assembly is installed at the bottom of the inner container.

[0017] Compared with the prior art, the utility model has the following beneficial effects: by arranging the second spray arm and the water retaining member on the first spray arm, the washing water sprayed from the first spray hole is dispersed by the water retaining member, the washing water is sprayed farther, the impact force is stronger, and the washing effect is better. The second spray arm can rotate relative to the first spray arm, and the spraying areas of the first spray arm and the second spray arm are superimposed, which expands the washing area, reduces the cleaning dead angle, and thus improves the washing effect as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of a spray arm assembly of the utility model, excluding the spray arm seat;

[0020] Figure 2 It is a schematic diagram of the explosion structure of a spray arm assembly of the utility model;

[0021] Figure 3 yes Figure 1 An enlarged view of section A of the spray arm assembly shown in FIG.

[0022] Figure 4 yes Figure 1 One of the schematic diagrams of the upper cover structure of the spray arm assembly shown in;

[0023] Figure 5 yes Figure 1 The second schematic diagram of the upper cover structure of the spray arm assembly shown in FIG.

[0024] Figure 6 yes Figure 2 An enlarged view of part B of the exploded structural schematic diagram of the spray arm assembly shown in FIG.

[0025] Figure 7 yes Figure 5 The second schematic diagram of the upper cover structure of the spray arm assembly is an enlarged view of part C;

[0026] Figure 8 yes Figure 1 A schematic diagram of the water retaining member structure of the spray arm assembly shown in FIG.

[0027] Fig. 9 yes Figure 1 A schematic diagram of the connecting shaft structure of the spray arm assembly shown in FIG.

[0028] Fig.10 yes Figure 1A schematic structural diagram of a second spray arm of the spray arm assembly shown;

[0029] Fig.11 It is a schematic diagram of the installation structure of the spray arm assembly of the utility model.

[0030] Indications in the figure: 1. spray arm seat; 2. first spray arm; 21. first spray arm body; 211. water inlet; 212. first spray hole; 2121. first guide wall; 2122. water baffle; 213. second spray hole; 214. first slot; 215. upper cover; 216. lower cover; 217. support; 22. water baffle; 221. blade; 2211. concave arc segment; 2212. chamfer; 222. through hole; 23. fixing member; 3. second spray arm; 31. spray arm branch; 311. third spray hole; 3111. second guide wall; 32. step surface; 4. connecting shaft; 42. water outlet; 43. buckle; 44. second slot; 5. limit member; 51. convex portion; 52. top cover; 6. liner. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The components of the embodiment of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] If the terms "first" or "second" appear, they are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0034] On the one hand, the present application provides a spray arm assembly that can be used in household appliances that require a spray arm to spray washing water for cleaning, such as a dishwasher, a cleaning machine, etc.

[0035] like Figure 1 , Figure 2 , Figure 6 and Fig.11As shown, the spray arm assembly includes a spray arm seat 1, a first spray arm 2 and a second spray arm 3. The first spray arm 2 is rotatably mounted on the spray arm seat 1, that is, during the washing process, the first spray arm 2 rotates relative to the spray arm seat 1. The first spray arm 2 includes a first spray arm body 21 with a hollow inner cavity and a water stopper 22. The first spray arm body 21 is provided with a water inlet 211, a first spray hole 212 and a second spray hole 213. When the first spray arm 2 is mounted on the spray arm seat 1, the water inlet 211 is connected to the waterway, and the washing water flows into the hollow inner cavity from the water inlet 211, and then is sprayed out through the first spray hole 212 and the second spray hole 213. The water retaining member 22 is rotatably mounted on the first spray arm body 21 and is located above the first spray hole 212. When the first spray hole 212 sprays water, the water hits the water retaining member 22, causing the water retaining member 22 to rotate. The water retaining member 22 breaks up and reflects the water, so that the water is sprayed farther, with a stronger impact force, a larger spray range, and a better washing effect.

[0036] Among them, at least one of the second spray arms 3 is rotatably arranged on the first spray arm body 21, and the second spray arm 3 is provided with a third spray hole 311. In this embodiment, two of the second spray arms 3 are installed at both ends of the first spray arm body 21, and the second spray arm 3 also has a hollow cavity for washing water to flow, and the hollow cavity is connected with the hollow inner cavity of the first spray arm 21. The washing water enters the second spray arm 3 from the first spray arm 21, and is sprayed out through the third spray hole 311 and drives the second spray arm 3 to rotate relative to the first spray arm body 21.

[0037] In the spray arm assembly of the present application, during washing operation, the first spray arm 21 rotates, and the second spray arm 3 also rotates, and the spray areas of the first spray arm 2 and the second spray arm 3 overlap. At the same time, the washing water sprayed from the first spray hole 212 on the first spray arm 21 is dispersed by the water blocking member 22, thereby further expanding the spray range and providing a stronger impact force. The movement trajectory of the washing water sprayed from the entire spray arm assembly is not a fixed concentric circle. Compared with the "single-line" spray arm in the prior art, the spray arm assembly of the present application expands the washing area, can reduce cleaning dead corners, and the washing water is sprayed at a longer distance with a stronger impact force, thereby improving the washing effect as a whole.

[0038] Further, such as Figure 1 , Figure 2 and Fig.10As shown, the second spray arm 3 is provided with a plurality of spray arm branches 31 that are interconnected, the third spray hole 311 is opened on the spray arm branches 31, the second spray arm 3 is connected to the first spray arm body 21 through a connecting shaft 4, the connecting shaft 4 is provided with a water inlet and a water outlet 42, the water inlet is clamped on the first spray arm body 21, so that the connecting shaft 4 is fixed on the first spray arm body 21, and the water outlet 42 is connected to the second spray arm 3. Washing water enters the water inlet of the connecting shaft 4 from the hollow inner cavity of the first spray arm body 21, then enters the second spray arm 3 from the water outlet 42, and finally is sprayed out from the third spray hole 311 to wash the tableware. In this embodiment, the second spray arm 3 is "Y-shaped", which is provided with three spray arm branches 31, and each of the spray arm branches 31 is provided with the third spray hole 311. The second spray arm 3 can be connected to the connecting shaft 4 by means of a buckle or the like, that is, the second spray arm 3 can be rotatably connected to the connecting shaft 4, and the specific connection method is not limited. In the spray arm assembly of the present application, when the third spray hole 311 sprays washing water, it also provides a rotational power for the second spray arm 3, and the second spray arm 3 rotates around the connecting shaft 4.

[0039] Preferably, the connecting shaft 4 is a hollow cone, the upper part of which is smaller than the lower part, the second spray arm 3 is sleeved on the connecting shaft 4, the lower part of the connecting shaft 4 is provided with a buckle part 43, the first spray arm body 21 is provided with a first clamping groove 214, the buckle part 43 is clamped in the first clamping groove 214, so that the connecting shaft 4 is installed on the first spray arm body 21. The top of the connecting shaft 4 is provided with a second clamping groove 44, and the limiter 5 is buckled in the second clamping groove 44 to limit the second spray arm 3 on the first spray arm body 21. On the one hand, it can prevent the second spray arm 3 from being separated from the first spray arm body 21 when rotating; on the other hand, the second spray arm 3 is sleeved on the connecting shaft 4, and the overall weight of the second spray arm 3 is lighter when rotating, and the resistance encountered during the rotation process is reduced, and its rotation speed can be faster than that of a conventional spray arm, thereby reducing the washing time.

[0040] In this embodiment, a plurality of water outlet holes 42 are opened on the side wall of the upper part, and the connecting shaft 4 is located at the intersection of the three spray arm branches 31, so that at least one of the water outlet holes 42 is directly opposite to the spray arm branch 31, and the washing water enters the spray arm branch 31 more concentratedly, and the driving force of the water flow is greater, thereby making the impact force of the water flow ejected from the third spray hole 311 greater, further increasing the rotation speed of the second spray arm 3 and shortening the washing time.

[0041] Furthermore, the limiting member 5 is provided with a convex portion 51 and a top cover 52, and a concave step surface 32 is provided on the top of the second spray arm 3. When the second spray arm 3 is sleeved on the connecting shaft 4, the convex portion 51 of the limiting member 5 is snap-fitted into the second slot 44, and the edge of the top cover 52 is placed on the step surface 32, so that the top cover 52 does not protrude too high from the surface of the second spray arm 3, thereby preventing the top cover 52 from contacting the bottom of the bowl basket during washing.

[0042] Further, such as Figure 2 , Figure 4 , Figure 5 and Figure 7 As shown, the first spray arm body 21 includes an upper cover 215 and a lower cover 216, and the upper cover 215 and the lower cover 216 are buckled together to form the hollow inner cavity. The first spray hole 212 is opened in the upper cover 215, and the water inlet 211 is arranged at the bottom of the lower cover 216. The water inlet 211 is inserted on the spray arm seat 1. In this embodiment, a fastener is also provided at the bottom of the lower cover 215, which is located on both sides of the water inlet 211. When the first spray arm 2 is installed on the spray arm seat 1, the fastener abuts against the spray arm seat 1, playing a certain limiting role.

[0043] The edge of the first jet hole 212 is provided with a first guide wall 2121 and a water baffle 2122. The first guide wall 2121 is located at the bottom of the upper cover 215 and is perpendicular to the upper cover 215. The water baffle 2122 is located at the top of the upper cover 215. The first guide wall 2121 has a guiding effect on the water flow, which can make the water flow sprayed from the first jet hole 212 more stable. The water baffle 2122 is arranged on the top of the upper cover 215 so that the water flow is more concentrated when sprayed, and can more concentratedly impact the water baffle 22. In order to reduce the resistance of the water flow, the water inlet end of the first guide wall 2121 is provided with a circular chamfer transition.

[0044] Further, such as Figure 4 and Figure 6 As shown, the second spray hole 213 is opened on the side walls at both ends of the upper cover 215, which can better provide driving force for the rotation of the first spray arm 2. In this embodiment, the second spray hole 213 is rectangular, and the rectangular spray hole can make the sprayed water flow more dispersed. When the first spray arm 2 rotates, the spray range of the second spray hole 213 spraying water flow can be expanded, and the spray area of ​​the spray arm assembly of the present application is further increased. Preferably, a plurality of the second spray holes 213 are opened diagonally on the side walls of the upper cover 215, that is, the second spray holes 213 are set on the outer side wall of the left end and the inner side wall of the right end of the upper cover 215, so that the first spray arm 2 can rotate more smoothly.

[0045] Further, such as Figure 1 , Figure 2 and Fig.10 As shown, the third spray hole 311 on the second spray arm 3 is provided with a second guide wall 3111, and the second guide wall 311 is oblique and inclined with the surface of the second spray arm 3. The oblique direction of the second guide wall 311 is the same as the rotation direction of the second spray arm 3. The second guide wall 3111 can make the sprayed water flow columnar, so as to better provide driving force for the second spray arm 3.

[0046] Further, such as Figure 1 , Figure 3 , Figure 4 and Figure 8 As shown, the water retaining member 22 is provided with a plurality of blades 221, and the blades have a concave arc segment 2211, and the concave direction of the concave arc segment 2211 is toward the water retaining plate 2122, so that the water flow sprayed from the first injection hole 212 hits the concave arc segment 2211, which can better promote the rotation of the water retaining member 22.

[0047] like Figure 1 , Figure 2 , Figure 4 and Figure 8 As shown, in order to reduce the resistance to the rotation of the water retaining member 22, a support portion 217 is provided on the first spray arm body 21, a through hole 222 is provided in the middle of the water retaining member 22, a plurality of blades 221 are distributed around the circumference of the through hole 222, and a chamfer 2212 is provided at the connection between the blades 221 and the through hole 222, the water retaining member 22 is sleeved on the support portion 217 through the through hole 222, and a fixing member 23 is detachably installed on the support portion 217 to limit the water retaining member 22 on the support portion 217 to prevent the water retaining member 22 from detaching from the support portion 217 when rotating.

[0048] Preferably, in this embodiment, the support portion 217 is provided with an internal thread, and the fixing member 22 is provided with an external thread, and the internal thread and the external thread are connected to achieve that the fixing member 22 can be detachably mounted on the support portion 217 .

[0049] On the other hand, the present application also provides a dishwasher, such as Fig.11As shown, the dishwasher includes an inner tank 6 and the above-mentioned spray arm assembly, and the spray arm assembly is installed at the bottom of the inner tank 6. Specifically, the spray arm seat 2 is fixedly installed at the bottom of the inner tank 6, and the first spray arm 2 is rotatably inserted on the spray arm seat 2. When the dishwasher starts the washing program, the spray arm assembly starts to work, and the first spray arm 2 rotates relative to the spray arm seat 2. At the same time, the second spray arm 3 rotates relative to the first spray arm 2, and the water retaining member 3 also rotates to disperse the water flow sprayed from the first spray hole 212. Since the inner tank is generally square, the first spray arm 2 and the second spray arm 3 of the dishwasher of the present application both rotate, and the washing water sprayed by the first spray arm 2 is dispersed, with a long range and a large washing range, so that the entire spray arm washing area is expanded, thereby reducing the washing dead corners of the inner tank and improving the overall washing effect of the dishwasher.

[0050] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A spray arm assembly, characterized in that: include: A spray arm seat, a first spray arm and a second spray arm, wherein the first spray arm is rotatably mounted on the spray arm seat, the first spray arm comprises a first spray arm body having a hollow inner cavity and a water stopper, the first spray arm body is provided with a water inlet, a first spray hole and a second spray hole, the water stopper is rotatably mounted on the first spray arm body and is located above the first spray hole, when the first spray hole sprays water, the water hits the water stopper, causing the water stopper to rotate; At least one of the second spray arms is rotatably disposed on the first spray arm body, and the second spray arm is provided with a third spray hole.

2. The spray arm assembly according to claim 1, characterized in that: The second spray arm is provided with a plurality of spray arm branches interconnected with each other, the third spray hole is opened on the spray arm branch, the second spray arm is connected to the first spray arm body through a connecting shaft, the connecting shaft is provided with a water inlet and a water outlet, the water inlet is clamped on the first spray arm body, and the water outlet is connected with the second spray arm.

3. The spray arm assembly according to claim 2, characterized in that: The connecting shaft is a hollow cone, the second spray arm is sleeved on the connecting shaft, a buckle portion is provided at the lower part of the connecting shaft, a first slot is provided on the first spray arm body, and the buckle portion is clamped in the first slot; a second slot is provided at the top end of the connecting shaft, and a limiter is buckled in the second slot to restrict the second spray arm to the first spray arm body.

4. The spray arm assembly according to claim 3, characterized in that: The limiting member is provided with a convex portion and a top cover, the top of the second spray arm is provided with a concave step surface, the convex portion is buckled in the second slot, and the edge of the top cover is placed on the step surface.

5. The spray arm assembly according to claim 1, characterized in that: The first spray arm body includes an upper cover and a lower cover, and the upper cover and the lower cover are buckled to form the hollow inner cavity. The edge of the first spray hole is provided with a first guide wall and a water baffle plate, the first guide wall is perpendicular to the bottom of the upper cover, and the water baffle plate is located on the top of the upper cover.

6. The spray arm assembly according to claim 5, characterized in that: The second injection holes are formed on the side walls at both ends of the upper cover.

7. The spray arm assembly according to claim 1, characterized in that: The third spray hole is provided with a second guide wall, and the second guide wall is inclined with respect to the surface of the second spray arm.

8. The spray arm assembly according to claim 5, characterized in that: The water retaining member is provided with a plurality of blades, each of which has an inwardly concave arc section, and the inwardly concave direction of the inwardly concave arc section faces the water retaining plate.

9. The spray arm assembly according to claim 1, characterized in that: A supporting part is provided on the main body of the first spray arm, the water blocking member is sleeved on the supporting part, and a fixing member is detachably mounted on the supporting part.

10. A dishwasher, characterized in that: It comprises an inner container and a spray arm assembly according to any one of claims 1 to 9, wherein the spray arm assembly is installed at the bottom of the inner container.

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