A spray head assembly and a spray arm for a dishwasher

Abstract

The application discloses a nozzle assembly and a spraying arm for a dishwasher. The nozzle assembly comprises a support seat with a through hole, a base which is at least partially installed in the lower end of the through hole, the base having a plurality of water inlet holes arranged at intervals in the circumferential direction, the water inlet holes being arranged spirally upward in a first direction, and an impeller which is rotatably arranged in the upper end of the through hole and rotationally connected to the base, the impeller having a plurality of water outlet holes arranged at intervals in the circumferential direction, the water outlet holes being arranged spirally upward in a second direction. The nozzle assembly of the application has a simple structure and can drive water to form a conical rotating water flow, thereby providing a wider scanning area and a higher frequency of pulse point scanning, so as to improve the washing rate and cleaning efficiency of the dishwasher.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dishwashers, and in particular to a nozzle assembly and a spray arm for a dishwasher. BACKGROUND

[0002] The washing rate is one of the important parameters of the performance of a dishwasher, and the washing capacity and washing effect are the key contents for distinguishing the advantages and disadvantages of a dishwasher. However, in addition to the types, forms and dry states of pollutants, the design of the spray arm and the performance of the shelf, pipeline and washing pump and other components can directly affect the washing effect, which is the main direction of research of various manufacturers, especially the research on the sprayer, and the differences among various manufacturers are obvious, and it is relatively easy to form a differentiated competitive advantage.

[0003] Some existing spray arms increase a secondary spray arm on the main spray arm, however, the spray pressure loss at the connection between the main spray arm and the secondary spray arm is very large, and under the same washing pump condition, the spray force of this kind of spray arm scheme will be greatly discounted, which affects the washing rate. At the same time, the two-layer main and secondary spray arms also cause the total height of the sprayer to be added to a very large value, which is not conducive to the overall space utilization rate of the dishwasher. SUMMARY

[0004] The present application aims to at least solve one of the problems existing in the prior art to some extent, and for this purpose, the present application provides a nozzle assembly which has a simple structure and can drive water to form a conical rotating water flow, provide a wider sweeping area and higher frequency pulse point scanning, thereby improving the washing rate and cleaning efficiency of the dishwasher. The present application also provides a spray arm for a dishwasher.

[0005] According to the above-mentioned nozzle assembly, the following technical solutions are implemented:

[0006] A nozzle assembly comprises a support seat having a through hole, a base at least partially installed in the lower end of the through hole, the base having a plurality of water inlet holes arranged at intervals in the circumferential direction, the water inlet holes being arranged spirally upward in a first direction, and an impeller rotatably arranged in the upper end of the through hole and rotationally connected to the base, the impeller having a plurality of water outlet holes arranged at intervals in the circumferential direction, the water outlet holes being arranged spirally upward in a second direction.

[0007] In some embodiments, the base comprises a fixed shaft installed in the lower end of the through hole and a plurality of vanes, the vanes being arranged at intervals in the circumferential direction between the fixed shaft and the hole wall of the through hole, each of the vanes being arranged spirally on the fixed shaft in the first direction, and the radially outer end of each of the vanes abutting or connecting the hole wall of the through hole, the water inlet holes being formed between adjacent vanes.

[0008] In some embodiments, the spiral angle of the vanes is 30-60°.

[0009] In some embodiments, the fixed shaft is provided with a mounting hole opening towards the impeller, and the impeller is provided with a positioning portion extending towards the fixed shaft, which is rotatably arranged in the mounting hole.

[0010] In some embodiments, the base further comprises a sleeve, which is sleeved on the periphery of all the vanes, and the radially outer end of each vane is abutted or connected with the hole wall of the through hole through the sleeve.

[0011] In some embodiments, the impeller comprises a rotating shaft rotatably arranged in the upper end of the through hole and rotationally connected with the base, and a plurality of blades are circumferentially arranged between the rotating shaft and the hole wall of the through hole, each blade is spirally arranged on the rotating shaft along a second direction, and the water outlet holes are formed between adjacent blades.

[0012] In some embodiments, the spiral angle of the blades is 30-60°.

[0013] In some embodiments, the hole wall of the through hole is fixedly provided with an annular limiting portion extending towards the inside thereof, the blade of the impeller is provided with a clamping portion matched with the annular limiting portion, and the annular limiting portion is clamped with the clamping portion.

[0014] In some embodiments, a sealing member is further included, and at least one annular mounting groove opening outwards is formed in the outer side wall of the support base, and the sealing member is sleeved in the annular mounting groove.

[0015] According to the above-mentioned spray arm for a dishwasher, the following technical solutions are adopted:

[0016] The spray arm for a dishwasher comprises a spray arm base having a water inlet, a main spray arm rotatably arranged on the spray arm base, the main spray arm having a water storage cavity and a plurality of water outlets communicating with the water storage cavity, and a rotational flow device provided at each water outlet, the rotational flow device having a rotational flow injection hole for driving water to form a conical rotational water flow, and the rotational flow injection hole being communicated with the water inlet through the water storage cavity.

[0017] In some embodiments, the rotational flow device comprises a spray head assembly as described above, the support base is mounted in the water outlet and sealingly connected with the spray arm base, each water outlet can be communicated with the water storage cavity through any water inlet, and all the water outlets and all the water inlets jointly constitute the rotational flow injection hole.

[0018] In some embodiments, the main spray arm further has a plurality of water spray holes, which are in communication with the water inlet through the water storage cavity.

[0019] Compared with the prior art, the present application has at least the following advantages:

[0020] 1. The spray head assembly of the present application, by installing an impeller and a base arranged in an upper and lower manner in a support seat, the water inlet hole on the base being opposite in spiral direction to the water inlet hole on the impeller, has a simple structure and can drive water to form a conical rotating water flow, providing a wider sweeping area and a higher frequency of pulse point scanning, thereby improving the washing rate and cleaning efficiency of the dishwasher and greatly reducing the dishwashing time of the dishwasher.

[0021] 2. The spray arm of the present application, by installing a rotational flow device having rotational flow spray holes at the water outlet of the main spray arm, does not cause a large degree of pressure loss, and the rotational flow spray holes have a capacity of 1.5 times that of the water spray holes in terms of pressure and flow, continuously and high-speed flushing the dishes with the rotation of the main spray arm, achieving rapid removal of dirt on the surface of the dishes.

[0022] 3. By detachably installing the rotational flow device at the water outlet of the main spray arm, after the rotational flow device is separately detached, it is not only convenient for cleaning and maintaining the rotational flow spray holes, but also convenient for further deep cleaning and maintaining the main spray arm of the dishwasher. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is an exploded view of the spray head assembly in Example 1 of the present application;

[0024] Figure 2 is a cross-sectional view of the spray head assembly in Example 1 of the present application after the sealing member is removed;

[0025] Figure 3 is a structural schematic view of the base in Example 1 of the present application;

[0026] Figure 4 is a structural schematic view of the impeller in Example 1 of the present application;

[0027] Figure 5 is the water outlet state of the spray head assembly in Example 1 of the present application under the condition that the impeller does not rotate;

[0028] Figure 6 is the water outlet state of the spray head assembly in Example 1 of the present application under the condition that the impeller rotates;

[0029] Figure 7 is a cross-sectional view of the spray arm in Example 2 of the present application;

[0030] Figure 8 is the water outlet state of the rotational flow spray hole of the main spray arm in Example 2 of the present application under the condition that the main spray arm rotates.

[0031] In the figure: 1-nozzle assembly, 11-support seat, 111-through hole, 112-annular limiting part, 113-annular mounting groove, 12-base, 120-water inlet hole, 121-fixing shaft, 1211-mounting hole, 122-vane, 123-sleeve, 13-impeller, 130-water outlet hole, 131-rotating shaft, 1311-limiting part, 132-blade, 1321-detent, 14-sealing element;

[0032] 2-spray arm seat, 21-water inlet; 3-main spray arm, 31-water storage cavity, 321-water outlet, 322-water spray hole; 4-rotary joint. DETAILED DESCRIPTION

[0033] The following examples are used to illustrate the present application, but the present application is not limited by these examples. Modifications to the specific embodiments of the present application or equivalent replacements to some technical features are made without departing from the spirit of the present application, which should be covered in the technical solution range claimed by the present application.

[0034] Example 1

[0035] Reference Figures 1-2 The present embodiment provides a nozzle assembly applied to a spray arm of a dishwasher, which comprises a support seat 11, a base 12 and an impeller 13. The support seat 11 has a through hole 111 penetrating through the top and bottom thereof. At least part of the base 12 is fixedly installed in the lower end of the through hole 111 from bottom to top, so that the base 12 cannot rotate relative to the support seat 11. The base 12 has a plurality of water inlet holes 120 arranged at intervals in the circumferential direction, and the water inlet holes 120 are arranged in a spiral upward in a first direction. The impeller 13 is rotatably arranged in the upper end of the through hole 111 and rotationally connected to the base 12. The impeller 13 has a plurality of water outlet holes 130 arranged at intervals in the circumferential direction, and the water outlet holes 130 are arranged in a spiral upward in a second direction.

[0036] In the present embodiment, the first direction and the second direction are exactly opposite, the first direction can be counterclockwise, and the second direction is clockwise. All the water outlet holes 130 and all the water inlet holes 120 together constitute a rotational flow jet hole, and a plurality of water columns can be formed when water flows through the rotational flow jet hole. Referring to Figure 5 .

[0037] When water flows through the base 12 with water inlet holes 120, it impacts and drives the impeller 13 with water outlet holes 130 to rotate counterclockwise. Referring to Figure 2When the impeller 13 rotates under the driving of the water flow, the rotational flow injection hole can drive the water to form a conical rotating water flow, so that the multiple water columns flowing out of the rotational flow injection hole rotate at high speed around the central axis of the rotational flow injection hole, like a high-speed self-rotating circular brush, quickly brushing off the dirt on the surface of the dishes. Referring to Figure 6 Compared with the original single water column flushing of the spray arm, the nozzle assembly provides a wider sweeping area and a higher frequency of pulse point scanning, thereby improving the washing rate and cleaning efficiency of the dishwasher, and greatly reducing the dishwashing time of the dishwasher.

[0038] Referring to Figures 1-2 The support seat 11 also has an annular limiting portion 112, and the annular limiting portion 112 is integrally formed on the hole wall of the through hole 111 and extends towards the inside thereof. The annular limiting portion 112 is used for upper limiting of the impeller 13 to prevent the impeller 13 from being pulled out upward from the support seat 11. The base 12 is used for lower limiting of the impeller 13 to prevent the impeller 13 from being pulled out downward. Thus, through the cooperation of the base 12 and the annular limiting portion 112 of the support seat 11, the impeller is reliably positioned in the through hole of the support seat 11.

[0039] The support seat 11 also has an annular mounting groove 113, and at least one annular mounting groove 113 is opened outward on the outer side wall of the support seat 11. The sealing element 14 is sleeved in the annular mounting groove 113, so that the support seat or the nozzle assembly is reliably sealed and connected to the water outlet of the spray arm through the sealing element mounted in the annular mounting groove.

[0040] Referring to Figures 1-3 The base 12 is tightly fitted with the hole wall of the through hole of the support seat 11 to encapsulate the impeller 13 in the through hole, so as to lower limit the impeller 13 and prevent the impeller 13 from falling off downward. In addition, the base 12 can provide the impeller 13 with an impact water flow at a certain angle, so that the impeller 13 can reliably rotate under the water flow washing force of the impact water flow.

[0041] The base 12 includes a fixed shaft 121 and a plurality of vanes 122. The fixed shaft 121 is installed in the lower end of the through hole 111, and the fixed shaft 121 is coaxially arranged with the through hole 111. In this embodiment, the number of vanes 122 is preferably 6, and all the vanes 122 are circumferentially spaced between the fixed shaft 121 and the hole wall of the through hole 111. Each vane 122 is spirally arranged on the fixed shaft 121 in the first direction, and the radially inner end thereof is integrally formed with the fixed shaft 121, and the radially outer end thereof tightly abuts or connects the hole wall of the through hole 111. The adjacent vanes 122 form a water inlet hole 120. Since each vane 122 is spirally arranged in the first direction, the water inlet hole 120 between the adjacent vanes 122 is spirally arranged in the first direction, which facilitates the upward flow of water to the impeller 13, thereby forming an impact water flow to drive the rotation of the impeller.

[0042] The lower end of the fixed shaft 121 is closed, and the upper end has a mounting hole 1211 that opens towards the impeller 13. This mounting hole 1211 is used to engage with the positioning part 1311 on the impeller 13, allowing the impeller 13 to reliably rotate and connect to the fixed shaft 121 on the base 12. The helical angle of the vortex vane 122 is 30-60°, preferably any one of 35°, 40°, 45°, 50°, or 55°. In this embodiment, the helical angle of the vortex vane 122 along the first direction is 45°, thus giving the base 12 a vortex vane with a reverse 45-degree angle. When water flows through the nozzle assembly 1, the water flows through the base with the reverse 45-degree vortex vane and impacts the impeller 13 at a certain angle. This water flow scouring force will drive it to rotate counterclockwise. (Refer to...) Figure 2 .

[0043] The base 12 also includes a sleeve 123, which is fitted around all the vortex blades 122 and tightly abuts against the wall of the through hole 111. The radial outer end of each vortex blade 122 is integrally formed with the sleeve 123, and the radial outer wall of the water inlet hole 120 is partially formed by the sleeve 123. This allows the radial outer end of each vortex blade 122 to be tightly fitted with the lower end of the through hole 111 through the sleeve 123, increasing the contact area between the base 12 and the through hole 111, and facilitating the reliable installation of the base 12 within the support 11.

[0044] refer to Figures 1-2 and Figure 4 The impeller 13 includes a rotating shaft 131 and multiple blades 132. The rotating shaft 131 is rotatably mounted in the upper end of the through hole 111 and rotatably connected to the fixed shaft 121 of the base 12. In this embodiment, the number of blades 132 is preferably three. All blades 132 are circumferentially spaced between the rotating shaft 131 and the hole wall of the through hole 111. Each blade 132 is spirally arranged on the rotating shaft 131 along a second direction, and its radial outer end is clearance-fitted with the hole wall of the through hole 111. Water outlet holes 130 are formed between adjacent blades 132. Since each blade 132 is spirally arranged along the second direction, the water outlet holes between adjacent blades 132 are spirally arranged along the second direction. When the impeller 13 is not rotating, the water flows out from the nozzle assembly 1 to form three water columns, as shown in the reference. Figure 5 When the impeller is driven to rotate by the water flow, the impeller 13, which has three water outlets 130, will drive the water column to form a conical rotating water flow, just like a high-speed rotating round brush, quickly removing dirt from the surface of dishes. (Reference) Figure 6 .

[0045] The end of the rotating shaft 131 close to the base 12 is fixed with a positioning part 1311 extending towards the fixed shaft 121, and the positioning part 1311 is rotatably arranged in the mounting hole 1211 of the fixed shaft 121. The helix angle of the blade 132 is 30-60°, preferably any one of 35°, 40°, 45°, 50° or 55°. The helix angle of the blade 132 along the second direction in this embodiment is 45°, so that the impeller is provided with forward 45° blades, and when the water flow passes through the base provided with reverse 45° blades, the water flow impacts the impeller 13 provided with forward 45° blades at 90°, and the water flow scouring force drives the impeller to rotate counterclockwise. Referring to Figure 2 .

[0046] To prevent the impeller 13 from being pulled out upward from the support base 11, each blade 132 is provided with a clamping part 1321 corresponding to the position of the annular limiting part 112, and the annular limiting part 112 is clamped with the clamping part 1321 to limit the upward movement of the impeller 13.

[0047] Embodiment 2

[0048] Referring to Figures 7-8 , the embodiment provides a spraying arm for a dishwasher, which comprises a spraying arm base 2, a main spraying arm 3 and a rotational flow device (not shown in the figure), wherein the spraying arm base 2 is provided with a water inlet 21 through which water flows and is vertically arranged. The main spraying arm 3 is rotatably arranged on the spraying arm base 2, and the main spraying arm 3 is provided with a water storage cavity 31 and a plurality of water outlets 321 communicating with the water storage cavity 31. The number of water outlets 321 in this embodiment is two, and the two water outlets 321 are respectively located on the opposite outer sides of the spraying arm base 2. A rotational flow device is detachably connected and fixed to each water outlet 321, and the rotational flow device is provided with rotational flow injection holes for driving water to form a conical rotational water flow. The rotational flow injection holes are in communication with the water inlet 21 through the water storage cavity 31.

[0049] It can be seen that by installing the rotational flow device with rotational flow injection holes at the water outlet 321 of the main spraying arm 3, the pressure loss is not large, and the rotational flow injection holes have a capacity of 1.5 times that of the water injection hole in terms of pressure and flow. The dishes are continuously and rapidly scoured by the high-speed water flow with the rotation of the main spraying arm, so that the dirt on the surface of the dishes is quickly brushed away, thereby improving the washing rate and cleaning efficiency of the dishwasher. Therefore, without changing the main water path and main washing pump of the dishwasher, two or more rotational flow devices with rotational flow injection holes can be arranged according to the rotation of the main spraying arm 3. Compared with a single rotational flow injection hole, the washing effect and cleaning efficiency of the dishwasher can be further improved. Since the rotational flow device is a separate component detachably connected to the main spraying arm 3, it is convenient to maintain, and after being detached, it is convenient to clean and maintain the rotational flow injection hole, and it is also convenient to further clean and maintain the main spraying arm 3 of the dishwasher.

[0050] In order to facilitate the rotation of the main spray arm 3 with the spray arm base 2, the spray arm further comprises a rotary joint 4, and the main spray arm 3 is rotatably connected with the spray arm base 2 through the rotary joint 4, so that when the main spray arm 3 rotates under the driving of the water flow, the main spray arm 3 can drive the rotary joint 4 to rotate relative to the spray arm base 2.

[0051] The rotational flow device comprises a spray head assembly as described in Embodiment 1, and the support base 11 is installed in the water outlet 321 and is sealingly connected with the spray arm base 2, the lower end of the support base 11 is threadedly connected with the lower end of the peripheral wall of the water outlet 321, and the upper end of the support base 11 is sealingly connected with the peripheral wall of the water outlet 321 through at least one sealing member 14, so that the spray head assembly is sealingly and detachably connected with the main spray arm 3, and the leakage phenomenon at the joint is prevented. Each water outlet hole 130 can be connected with the water storage cavity 31 through any water inlet hole 120, and all the water outlet holes 130 and all the water inlet holes 120 jointly constitute the rotational flow injection hole.

[0052] In order to enable the spray arm to form different water outlet states, i.e. to have multiple water outlet states, the main spray arm 3 further has multiple water injection holes 322, each of which is connected with the water inlet 21 through the water storage cavity 31, wherein part of the water injection holes 322 serve as driving holes, and the other part of the water injection holes 322 serve as ordinary injection holes. Under the driving of the water flow, the main spray arm 3 will rotate on the spray arm base 2 together with the rotary joint 4. The water flow sprayed from the water injection holes 322 constitutes a first water outlet state, and the conical rotational water flow sprayed from the rotational flow injection hole constitutes a second water outlet state.

[0053] The above only describes some embodiments of the present application. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are all within the protection scope of the present application.

Claims

1. A showerhead assembly, comprising: The utility model relates to a water pump, comprising: a support seat (11) having a through hole (111); a base (12) at least partially mounted in the lower end of the through hole (111), the base (12) having a plurality of water inlet holes (120) arranged at intervals in the circumferential direction, the water inlet holes (120) being arranged helically upward in a first direction; a impeller (13) rotatably arranged in the upper end of the through hole (111) and rotationally connected to the base (12), the impeller (13) having a plurality of water outlet holes (130) arranged at intervals in the circumferential direction, the water outlet holes (130) being arranged helically upward in a second direction, the first direction being opposite to the second direction; the base (12) comprising a fixed shaft (121) mounted in the lower end of the through hole (111) and a plurality of vanes (122) circumferentially arranged between the fixed shaft (121) and the hole wall of the through hole (111), each vane (122) being helically arranged on the fixed shaft (121) in the first direction and having a radially outer end abutting or connected to the hole wall of the through hole (111), the water inlet holes (120) being formed between adjacent vanes (122); the impeller (13) comprising a rotating shaft (131) rotatably mounted in the upper end of the through hole (111) and rotationally connected to the base (12), and a plurality of blades (132) circumferentially arranged between the rotating shaft (131) and the hole wall of the through hole (111), each blade (132) being helically arranged on the rotating shaft (131) in the second direction, the water outlet holes (130) being formed between adjacent blades (132).

2. A showerhead assembly as described in claim 1, wherein The helix angle of the vanes (122) is 30-60°.

3. The showerhead assembly of claim 1, wherein The fixed shaft (121) is provided with a mounting hole (1211) opening towards the impeller (13), the impeller (13) has a positioning portion (1311) extending towards the fixed shaft (121), the positioning portion (1311) being rotatably arranged in the mounting hole (1211).

4. The showerhead assembly of claim 1, wherein The base (12) further comprises a sleeve (123) sleeved around all the vanes (122), the radially outer end of each vane (122) abutting or connected to the hole wall of the through hole (111) through the sleeve (123).

5. The showerhead assembly of claim 1, wherein The helix angle of the blades (132) is 30-60°.

6. The showerhead assembly of claim 1, wherein The hole wall of the through hole (111) is fixedly provided with an annular limiting portion (112) extending towards the inside thereof, the blades (132) of the impeller (13) are provided with a clamping portion (1321) matched with the annular limiting portion (112), the annular limiting portion (112) and the clamping portion (1321) are clamped in cooperation.

7. A showerhead assembly as defined in any of claims 1-5, wherein Further comprising a sealing member (14), at least one annular mounting groove (113) is opened outwardly on the outer side wall of the support base (11), and the sealing member (14) is sleeved in the annular mounting groove (113).

8. Spray arm for a dishwasher, characterized in that The application relates to a rotating flow device and a shower head assembly. The shower head assembly comprises a rotating flow device and a shower head. The rotating flow device comprises a shower head assembly as claimed in any one of claims 1-7. The rotating flow device is provided with the rotating flow device at each of the water outlets (321), and the rotating flow device has a rotating flow injection hole for driving water to form a conical rotating water flow. 9.The spray arm for a dishwasher according to claim 8, characterized in that, The rotating flow injection hole is connected with the water inlet (21) through the water storage cavity (31).

10. The spray arm for a dishwasher according to claim 8 or 9, characterized in that The support base (11) is mounted in the water outlet (321) and is sealingly connected with the shower head (2), each of the water outlet holes (130) can be connected with the water storage cavity (31) through any one of the water inlet holes (120), and all the water outlet holes (130) and all the water inlet holes (120) jointly form the rotating flow injection hole. The main shower arm (3) further has a plurality of water injection holes (322), and the water injection holes (322) are connected with the water inlet (21) through the water storage cavity (31). The main shower arm (3) further has a plurality of water injection holes (322), and the water injection holes (322) are connected with the water inlet (21) through the water storage cavity (31).

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