Spray arm structure for a dishwasher and dishwasher

Abstract

The utility model relates to a kind of spray arm structure and dishwasher for dishwasher, including spray arm base and rotatably mounted on the spray arm base spray arm, the top wall of this spray arm is arranged with first spray hole, each the first spray hole respectively embeds the first spray head that can be with the center line of the first spray hole as center rotation, and the center line of the injection hole of each first spray head respectively with the center line of the first spray hole where it is located intersects, further include transmission mechanism, the state that the spray arm is relative to spray arm base rotation can be by each first spray head synchronous rotation with the transmission mechanism is driven. Compared with prior art, the utility model can change the injection direction of its injection hole when each first spray head rotates with spray arm, so as to expand the spray coverage of spray arm, reduce spray dead angle, improve washing effect.

Description

Technical Field

[0001] This utility model relates to the field of dishwashers, and more particularly to a spray arm structure for a dishwasher and a dishwasher. Background Technology

[0002] The dishwasher uses a washing pump to pump water into the spray arm, which sprays the water onto the dishes. The sprayed water then falls back to the water pump and flows back to the washing pump. Through repeated rinsing, the dirt on the dishes is washed off, thus cleaning them. For example, Chinese utility model patent with patent number ZL201921591409.X (authorization announcement number CN211270573U) discloses a spray system for a dishwasher, including: an inner tub, which is a cavity structure with an open top, and a water collection cup is provided at the bottom of the inner tub. The water collection cup has an open top structure and is connected to the inner tub, and a filter assembly is provided inside the water collection cup; a washing pump, which is located at the bottom of the inner tub, and has an inlet and an outlet. The inlet of the washing pump is connected to the water collection cup; a spray arm, which is rotatably disposed in the inner tub and located at the bottom of the inner tub, and is connected to the outlet of the washing pump. The top of the spray arm has multiple spray holes facing different directions; and a nozzle, which is disposed on the upper part of the outer wall of the inner tub and is connected to the inner tub, and is connected to the outlet of the washing pump.

[0003] However, since the head and flow rate of the washing pump are fixed, the size and number of spray holes on the spray arm are limited in order to ensure the spray pressure. The spray holes on the spray arm are distributed intermittently (generally between 20-70mm). This results in uneven coverage by the spray holes. Areas that the spray holes cannot reach can only be cleaned by water splashing (the scouring force of splashed water is reduced by an order of magnitude, and the cleaning ability will be greatly reduced), affecting the cleaning effect of the dishwasher. Summary of the Invention

[0004] The first technical problem to be solved by this utility model is to provide a spray arm structure for a dishwasher with good cleaning effect, which is in contrast to the prior art.

[0005] The second technical problem to be solved by this utility model is to provide a dishwasher with the above-mentioned spray arm structure, which is in contrast to the prior art.

[0006] The technical solution adopted to further solve the first technical problem mentioned above is: a spray arm structure for a dishwasher, including a spray arm base and a spray arm rotatably mounted on the spray arm base, wherein a first spray hole is arranged on the top wall of the spray arm, characterized in that,

[0007] Each of the first spray holes is fitted with a first spray head that can rotate about the center line of the first spray hole, and the center line of the spray hole of each first spray head intersects the center line of the first spray hole.

[0008] It also includes a transmission mechanism, which enables each first spray head to rotate synchronously when the spray arm is rotating relative to the spray arm base.

[0009] Furthermore, a water inlet is provided at the center of the bottom of the spray arm. The transmission mechanism includes a fixed shaft and a connecting rod. The fixed shaft extends along the centerline of the water inlet and its lower end is fixed to the spray arm seat, while its upper end extends into the spray arm and is fixed with a first rotating shaft that is offset from the centerline of the water inlet and parallel to the fixed shaft.

[0010] The lower ends of each of the first spray heads are located in the spray arm, and each is fixed with a second rotating shaft that is offset from the center line of the first spray hole and parallel to the center line. The connecting rod is housed in the spray arm along its length and has shaft holes that correspond one-to-one with each rotating shaft for connection. Thus, when the spray arm rotates relative to the spray arm seat, it drives the connecting rod to rotate relative to the first rotating shaft, and the connecting rod drives each of the second rotating shafts to rotate each pair of first spray heads, thereby changing the spray angle of each first spray head.

[0011] Furthermore, the fixed shaft extends vertically and also includes a horizontally extending connecting arm. One end of the connecting arm is fixed to the upper end of the fixed shaft, while the top of the other end is fixed to the vertically extending first rotating shaft. By setting the connecting arm at the upper end of the fixed shaft, the first rotating shaft is positioned at the upper end of the fixed shaft, ensuring that the extension direction of the first rotating shaft deviates from the centerline of the water inlet.

[0012] Furthermore, each of the first spray heads is a cylinder with a central opening forming a vertically penetrating spray channel. One end of this spray channel is a water inlet located in the spray arm, and the other end is the spray hole.

[0013] Furthermore, each first spray head includes a connecting portion extending vertically and embedded in the corresponding first spray hole, and a spray portion located above the connecting portion and bent to one side relative to the connecting portion. An upper limit ring and a lower limit ring are respectively circumferentially protruding from the upper and lower sides of the connecting portion on the outer circumferential surface of each first spray head. Each lower limit ring is circumferentially attached to the top surface of the top wall of the spray arm, and each lower limit ring is circumferentially attached to the bottom surface of the top wall of the spray arm. This design ensures that each first spray head is stably installed in the corresponding first spray hole and can rotate smoothly within the corresponding first spray hole. It also allows the spray direction of each first spray head's spray hole to deviate from the corresponding first spray hole.

[0014] Furthermore, the lower limiting rings of each of the first spray heads are horizontally extending disks, and a vertically extending second rotating shaft is eccentrically fixed on the lower surface of each lower limiting ring. This enables the second rotating shaft to be stably positioned on the corresponding first spray head, and ensures that the extension direction of each second rotating shaft deviates from the centerline direction of the corresponding first spray hole.

[0015] Furthermore, the inlet edge of the spray arm extends vertically downward in the circumferential direction to form a first connecting sleeve, while the spray arm base is provided with a vertically extending second connecting sleeve. The first connecting sleeve and the second connecting sleeve are fitted inside and outside each other.

[0016] Furthermore, the first connecting sleeve can rotate circumferentially along the inner or outer circumferential surface of the second connecting sleeve, while the lower end of the fixed shaft is located in the second connecting sleeve and is fixed to the cylinder wall of the second connecting sleeve by fixing strips that are spaced apart circumferentially and extend radially. This enables the spray arm to be rotated on the spray arm seat and allows the spray arm to rotate smoothly relative to the spray arm seat.

[0017] Furthermore, the first connecting sleeve is inserted into the second connecting sleeve, and guide slides are circumferentially protruding on the outer circumferential surface of the first connecting sleeve. Each guide slide extends along the circumference of the first connecting sleeve, and when the spray arm is rotating, each guide slide can slide along the inner circumferential surface of the second connecting sleeve. By setting each guide slide, the spray arm can rotate more smoothly relative to the spray arm seat.

[0018] Furthermore, the bottom of the spray arm is provided with vertically extending locking strips on both sides of the first connecting sleeve, and the lower end of each locking strip is a hook. A circumferential locking ring is provided on the outer circumferential surface of the second connecting sleeve, and the hooks of each locking strip engage with this locking ring. The cooperation of each locking strip and locking ring prevents the spray arm from detaching from the spray arm seat during rotation.

[0019] Furthermore, each of the first spray holes is respectively opened at one end of the spray arm, while a second spray hole is respectively opened at the other end of the spray arm, and a second spray head is respectively fixed on each of the second spray holes.

[0020] Furthermore, the spray directions of the spray holes of each of the first spray heads are different, while the spray directions of the spray holes of each of the second spray heads are the same. This serves two purposes: firstly, by making the spray directions of the first spray heads different, it helps to better expand the spray coverage of the spray arm; secondly, by making the spray directions of the spray holes of each of the second spray heads the same, it is easier to control the rotation of the spray arm by designing the water reaction force experienced by the spray arm under the water inlet state.

[0021] The technical solution adopted to further solve the second technical problem mentioned above is: a dishwasher, characterized in that it includes the spray arm structure for a dishwasher as described above.

[0022] Compared with the prior art, the advantages of this utility model are as follows: each first spray hole is respectively embedded with a first spray head. When the spray arm rotates relative to the spray arm seat, the spray arm can drive each first spray head to rotate synchronously through the transmission mechanism. Since the center line of the spray hole of each first spray head intersects with the center line of the first spray hole, when each first spray head rotates with the spray arm, it can change the spray direction of its spray hole, thereby expanding the spray coverage of the spray arm, reducing spray dead angles, and improving the cleaning effect. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the spray arm structure in an embodiment of the present invention;

[0024] Figure 2 for Figure 1 A structural diagram from another direction;

[0025] Figure 3 for Figure 2 A cross-sectional view along the AA direction;

[0026] Figure 4 This is an exploded view of the spray arm structure in an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the spray arm holder in an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the structure of the first spray head in an embodiment of this utility model. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0030] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this utility model can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0031] A dishwasher includes a spray arm structure, such as Figures 1-6 As shown, the spray arm structure includes a spray arm base 2 and a spray arm 1 rotatably mounted on the spray arm base 2. A first spray hole 11 is arranged on the top wall of the spray arm 1.

[0032] Furthermore, each of the aforementioned first spray holes 11 is fitted with a first spray head 3 that can rotate around the center line of the first spray hole 11, and the center line of the spray hole 301 of each first spray head 3 intersects with the center line of the first spray hole 11. Furthermore, a transmission mechanism is also included, which enables the first spray heads 3 to rotate synchronously when the spray arm 1 is rotating relative to the spray arm base 2.

[0033] As can be seen from the above, in this utility model, each of the first spray holes 11 is respectively equipped with a first spray head 3. When the spray arm 1 rotates relative to the spray arm base 2, the spray arm 1 can drive each of the first spray heads 3 to rotate synchronously through the transmission mechanism. Since the center line of the spray hole 301 of each of the first spray heads 3 intersects with the center line of the first spray hole 11, when each of the first spray heads 3 rotates with the spray arm 1, it can change the spray direction of its spray hole 301, thereby expanding the spray coverage of the spray arm 1, reducing spray dead angles, and improving the cleaning effect.

[0034] like Figure 3As shown, a water inlet 10 is provided at the center of the bottom of the spray arm 1. The transmission mechanism includes a fixed shaft 5 and a connecting rod 6. The fixed shaft 5 extends along the centerline of the water inlet 10 and its lower end is fixed to the spray arm seat 2. Its upper end extends into the spray arm 1 and is fixed with a first rotating shaft 52 that is offset from the centerline of the water inlet 10 and parallel to the fixed shaft 5. The lower ends of each of the first spray heads 3 are located in the spray arm 1 and are respectively fixed with a second rotating shaft 341 that is offset from the centerline of the first spray hole 11 and parallel to the centerline. The connecting rod 6 is housed in the spray arm 1 along its length and is provided with shaft holes 61 that correspond one-to-one with each rotating shaft and are used to connect to the corresponding rotating shaft. Thus, when the spray arm 1 rotates relative to the spray arm seat 2, it drives the connecting rod 6 to rotate relative to the first rotating shaft 52. The connecting rod 6 drives each second rotating shaft 341 to rotate each pair of first spray heads 3, thereby changing the spray angle of each first spray head 3. In this embodiment, specifically, the center line of the water inlet 10 and the center line of each first spray hole 11 extend vertically.

[0035] Furthermore, such as Figure 4 and Figure 5 As shown, the aforementioned fixed shaft 5 extends vertically and also includes a horizontally extending connecting arm 51. One end of the connecting arm 51 is fixed to the upper end of the fixed shaft 5, while the top of the other end is fixed to the vertically extending first rotating shaft 52. By setting the connecting arm 51 at the upper end of the fixed shaft 5, the first rotating shaft 52 is positioned at the upper end of the fixed shaft 5, and it can be ensured that the extension direction of the first rotating shaft 52 is deviated from the centerline of the inlet 10.

[0036] Specifically, such as Figure 3 and Figure 6As shown, each of the aforementioned first spray heads 3 is a cylinder with a central opening forming a vertically penetrating spray channel 30. One end of the spray channel 30 is a water inlet 302 located in the spray arm 1, and the other end is the aforementioned spray hole 301. Furthermore, each first spray head 3 includes a vertically extending connecting portion 31 embedded in the corresponding first spray hole 11 and a spray portion 32 located on the connecting portion 31 and bent to one side relative to the connecting portion 31. On the outer circumferential surface of each first spray head 3, an upper limit ring 33 and a lower limit ring 34 are respectively circumferentially protruding on the upper and lower sides of its connecting portion 31. Each lower limit ring 34 is circumferentially attached to the top surface of the top wall of the spray arm 1, and each lower limit ring 34 is circumferentially attached to the bottom surface of the top wall of the spray arm 1. On the one hand, it ensures that each first spray head 3 is stably mounted in its corresponding first spray hole 11 and can rotate smoothly within the corresponding first spray hole 11. On the other hand, it ensures that the spray direction of the spray holes 301 of each first spray head 3 deviates from the corresponding first spray hole 11. Preferably, the lower limiting rings 34 of each of the above-mentioned first spray heads 3 are horizontally extending disks, and the lower surface of each lower limiting ring 34 is eccentrically fixed with the above-mentioned vertically extending second rotating shafts 341. This ensures that each second rotating shaft 341 is stably mounted on its corresponding first spray head 3 and that the extension direction of each second rotating shaft 341 deviates from the centerline direction of its corresponding first spray hole 11.

[0037] Furthermore, such as Figure 3 and Figure 4 As shown, the inlet 10 of the spray arm 1 extends vertically downward in the circumferential direction to form a first connecting sleeve 13, while the spray arm seat 2 is provided with a vertically extending second connecting sleeve 21. The first connecting sleeve 13 and the second connecting sleeve 21 are fitted together internally and externally. Furthermore, the first connecting sleeve 13 can rotate circumferentially along the inner or outer circumferential surface of the second connecting sleeve 21, and the lower end of the fixed shaft 5 is located in the second connecting sleeve 21 and is fixed to the cylinder wall of the second connecting sleeve 21 by fixing strips 23 that are spaced apart circumferentially and extend radially. This allows the spray arm 1 to be rotated on the spray arm seat 2 and enables the spray arm 1 to rotate smoothly relative to the spray arm seat 2.

[0038] Preferably, the first connecting sleeve 13 is inserted into the second connecting sleeve 21, and guide slides 131 are circumferentially protruding on the outer circumferential surface of the first connecting sleeve 13. Each guide slide 131 extends circumferentially along the first connecting sleeve 13, and each guide slide 131 can slide along the inner circumferential surface of the second connecting sleeve 21 when the spray arm 1 is rotating. By setting each guide slide 131, the spray arm 1 can rotate more smoothly relative to the spray arm seat 2. More preferably, the bottom of the spray arm 1 is provided with vertically extending latching strips 14 on both sides of the first connecting sleeve 13, and the lower end of each latching strip 14 is a latch hook 141. A latching protrusion ring 22 is circumferentially protruding on the outer circumferential surface of the second connecting sleeve 21, and the latch hooks 141 of each latching strip 14 are respectively hooked onto the latching protrusion ring 22. The cooperation of each latching strip 14 and each latching protrusion ring 22 can prevent the spray arm 1 from falling off the spray arm seat 2 during rotation.

[0039] like Figure 3 and Figure 4 As shown, each of the aforementioned first spray holes 11 is respectively opened at one end of the spray arm 1, while a second spray hole 12 is respectively opened at the other end of the spray arm 1. A second spray head 4 is fixedly mounted on each of the second spray holes 12. Furthermore, the spray directions of the spray holes 301 of each of the aforementioned first spray heads 3 are different, while the spray directions of the spray holes 301 of each of the second spray heads 4 are all the same. In this way, on the one hand, making the spray directions of the spray holes 301 of the first spray heads 3 different helps to better expand the spray coverage area of ​​the spray arm 1; on the other hand, making the spray directions of the spray holes 301 of each of the second spray heads 4 the same facilitates the control of the rotation of the spray arm 1 by designing the water reaction force on the spray arm 1 under the water inlet state.

[0040] In another embodiment, the dishwasher of this invention can be controlled by a voice module, which is equipped with a controller, a voice receiving module, and a voice parsing module. The voice receiving module receives user commands, and the voice parsing module parses the commands. Based on the parsed commands, the controller controls the dishwasher to perform corresponding operations, thereby realizing intelligent control of the dishwasher and improving the user experience.

Claims

1. A spray arm structure for a dishwasher, comprising a spray arm base (2) and a spray arm (1) rotatably mounted on the spray arm base (2), wherein a first spray hole (11) is arranged on the top wall of the spray arm (1), characterized in that, Each of the first spray holes (11) is fitted with a first spray head (3) that can rotate around the center line of the first spray hole (11), and the center line of the spray hole (301) of each first spray head (3) intersects the center line of the first spray hole (11). It also includes a transmission mechanism, which enables each first spray head (3) to rotate synchronously when the spray arm (1) is rotating relative to the spray arm base (2).

2. The spray arm structure for a dishwasher as described in claim 1, characterized in that, A water inlet (10) is provided at the center of the bottom of the spray arm (1). The transmission mechanism includes a fixed shaft (5) and a connecting rod (6). The fixed shaft (5) extends along the centerline of the water inlet (10) and its lower end is fixed to the spray arm seat (2), while its upper end extends into the spray arm (1) and is fixed with a first rotating shaft (52) that is offset from the centerline of the water inlet (10) and parallel to the fixed shaft (5). The lower ends of each of the first spray heads (3) are located in the spray arm (1) and are respectively fixed with a second rotating shaft (341) that is offset from the center line of the first spray hole (11) and parallel to the center line. The connecting rod (6) is housed in the spray arm (1) along the length direction of the spray arm (1) and is respectively provided with shaft holes (61) that correspond one-to-one with each rotating shaft and are connected to the corresponding rotating shaft.

3. The spray arm structure for a dishwasher as described in claim 2, characterized in that, The fixed shaft (5) extends vertically and also includes a horizontally extending connecting arm (51). One end of the connecting arm (51) is fixed to the upper end of the fixed shaft (5), while the top of the other end is fixed to the vertically extending first rotating shaft (52).

4. The spray arm structure for a dishwasher as described in claim 2 or 3, characterized in that, Each of the first spray heads (3) is a cylinder with a central hole forming a vertically penetrating spray channel (30). One end of the spray channel (30) is a water inlet (302) located in the spray arm (1), and the other end is the spray hole (301). Furthermore, each first spray head (3) includes a connecting part (31) extending vertically and embedded in the corresponding first spray hole (11) and a spray part (32) located on the connecting part (31) and bent to one side relative to the connecting part (31). On the outer peripheral surface of each first spray head (3), an upper limit ring (33) and a lower limit ring (34) are respectively circumferentially protruding on the upper and lower sides of the connecting part (31). Each lower limit ring (34) is circumferentially attached to the top surface of the top wall of the spray arm (1) and circumferentially attached to the bottom surface of the top wall of the spray arm (1).

5. The spray arm structure for a dishwasher as described in claim 4, characterized in that, Each of the first spray heads (3) has a lower limiting ring (34) that extends horizontally as a disc, and a second rotating shaft (341) that extends vertically is fixed eccentrically on the lower surface of each lower limiting ring (34).

6. The spray arm structure for a dishwasher as described in claim 2 or 3, characterized in that, The inlet (10) of the spray arm (1) extends vertically downward in the circumferential direction to form a first connecting sleeve (13), while the spray arm seat (2) is provided with a vertically extending second connecting sleeve (21). The first connecting sleeve (13) and the second connecting sleeve (21) are fitted together inside and outside each other. Furthermore, the first connecting sleeve (13) can rotate circumferentially along the inner or outer circumferential surface of the second connecting sleeve (21), and the lower end of the fixed shaft (5) is located in the second connecting sleeve (21) and is fixed to the cylinder wall of the second connecting sleeve (21) by fixing strips (23) that are spaced apart circumferentially and extend radially respectively.

7. The spray arm structure for a dishwasher as described in claim 6, characterized in that, The first connecting sleeve (13) is inserted into the second connecting sleeve (21), and guide slides (131) are circumferentially protruded on the outer circumferential surface of the first connecting sleeve (13). Each guide slide (131) extends along the circumferential direction of the first connecting sleeve (13), and each guide slide (131) can slide along the inner circumferential surface of the second connecting sleeve (21) when the spray arm (1) is rotating.

8. The spray arm structure for a dishwasher as described in claim 6, characterized in that, The bottom of the spray arm (1) is provided with vertically extending buckle strips (14) on both sides of the first connecting sleeve (13), and the lower end of each buckle strip (14) is a hook (141). The outer circumferential surface of the second connecting sleeve (21) is provided with a buckle protrusion ring (22), and the hooks (141) of each buckle strip (14) are respectively hooked onto the buckle protrusion ring (22).

9. The spray arm structure for a dishwasher as described in any one of claims 1 to 3, characterized in that, Each of the first spray holes (11) is opened at one end of the spray arm (1), and a second spray hole (12) is opened at the other end of the spray arm (1). A second spray head (4) is fixedly installed on each of the second spray holes (12). Furthermore, the spray directions of the spray holes (301) of each of the first spray heads (3) are different, while the spray directions of the spray holes (301) of each of the second spray heads (4) are the same.

10. A dishwasher, characterized in that, Includes the spray arm structure for a dishwasher as described in any one of claims 1 to 9.

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