Spraying arm of dish washing machine
By incorporating a buffer section and an arc-shaped protruding water spray channel design inside the dishwasher's spray arm, the problem of blind spots in the central area of the spray arm is solved, achieving a more comprehensive dishwashing effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2026-03-03
AI Technical Summary
The design of existing dishwasher spray arms creates a cleaning blind spot near the center of the spray arm, which cannot effectively clean small tableware and stubborn stains, affecting cleanliness and hygiene.
A cavity for holding washing water is set inside the spray arm, and nozzles are set in the buffer section near both sides of the channel. The buffer section is hemispherical and the protrusion is arc-shaped. The water spray channel is designed in multiple different directions to ensure that the water flow evenly covers the central area of the spray arm.
Through the combination of the buffer section and the protrusion, the sprayed water is evenly perpendicular to the spray arm, avoiding blind spots in cleaning, enhancing the cleaning effect on stubborn stains, and improving cleanliness and hygiene.
Smart Images
Figure CN223958797U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of dishwasher technology, and in particular to a dishwasher spray arm. Background Technology
[0002] As a highly efficient kitchen cleaning appliance, a dishwasher's cleaning principle primarily relies on the rotating water spray function of its spray arms. The spray arms, a key component, are connected to the water supply system and are driven by a motor to rotate. Their purpose is to evenly spray water (usually mixed with detergent) onto the dishes placed inside the dishwasher to remove various food residues and stains.
[0003] In the current design of dishwasher spray arms, the nozzles are usually all set on the protrusions on the outer surface of the spray arm. This design has a problem: the nozzles on the two protrusions on both sides of the center of the spray arm, no matter where the nozzles are located on the protrusions or what shape they are, will spray water jets that are deviated from the center of the spray arm and form an outward angle with the spray arm.
[0004] Because the water jets from the nozzles near the center of the spray arm are angled outwards relative to the spray arm, the area near the center of the spray arm never receives a direct water jet, creating a cleaning blind spot. In actual dishwasher use, this blind spot can cause numerous problems.
[0005] For example, when washing small tableware (such as small plates and bowls) or areas where the tableware is placed near the center of the spray arm's rotation, stains in these areas cannot be adequately rinsed away by the water flow. Especially for sticky food residue (such as rice, sauce, etc.) or dried stains, without sufficient water impact, they are difficult for detergent to effectively break down and remove. This not only reduces the cleanliness of the tableware but may also lead to stains remaining on the tableware, breeding bacteria, and affecting hygiene. Therefore, improvements are needed. Utility Model Content
[0006] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a dishwasher spray arm that aims to solve the technical problem that in the existing spray arms, since all the nozzles are set on the protrusions on the outer surface of the spray arm, the area near the center of the spray arm never receives a direct water jet, resulting in a cleaning blind spot.
[0007] The present invention provides a spray arm for a dishwasher. The interior of the spray arm forms a cavity for accommodating washing water. The spray arm includes a channel located in the middle of the spray arm and extending through the upper and lower surfaces of the spray arm. The spray arm is rotatably sleeved on a connecting shaft. A groove-shaped buffer part is provided on both sides of the upper surface of the spray arm near the channel. A nozzle is provided on the side wall away from the channel in each buffer part. Multiple protrusions are also provided on the upper surface from the buffer part to the end of the spray arm. Each protrusion is provided with at least one water spray channel.
[0008] Preferably, the longitudinal section of the buffer portion has an arc-shaped profile, and the longitudinal section of the protrusion has an arc-shaped profile.
[0009] Preferably, the buffer portion is hemispherical, and the protrusion is hemispherical.
[0010] Preferably, it includes a first half-spray arm and a second half-spray arm disposed on both sides of the channel.
[0011] Preferably, two of the multiple protrusions are a first protrusion and a second protrusion, respectively. The first protrusion and the second protrusion are respectively disposed on the first half-spray arm and the second half-spray arm. The first protrusion is disposed adjacent to a buffer part, and the second protrusion is disposed adjacent to another buffer part.
[0012] Preferably, the water spray channel includes a first water spray channel and a second water spray channel. The first water spray channel is located on the right side of the rear side of the first protrusion, and the rear end of the first water spray channel is away from the channel.
[0013] Preferably, the front end of the second water spray channel intersects the transverse center curve of the second protrusion, the second water spray channel is located on the left side of the rear side of the second protrusion, and the rear end of the second water spray channel is away from the channel.
[0014] The above technical solution has the following beneficial effects:
[0015] (1) The dishwasher spray arm provided by this utility model has a grooved buffer part on both sides of the spray arm near the channel, and a water spray channel is provided on the side wall of the buffer part away from the channel. By setting the grooved buffer part, the recessed buffer part plays a buffering and smoothing role on the vortex and miscellaneous flow. Thus, the water flow on the side away from the channel (i.e.: the center of the spray arm) is buffered and smoothed by the buffer part to form a stable water flow. The water flow sprayed from the water spray channel on the buffer part is evenly sprayed perpendicular to the spray arm, so that the area near the center of the spray arm has water spray, avoiding the formation of cleaning blind spots.
[0016] (2) The dishwasher spray arm provided by this utility model, through the mutual cooperation of the buffer part and the protrusion, allows the water flow sprayed from the nozzles on it to cooperate with each other, thereby covering a large area of the area to be cleaned. Attached Figure Description
[0017] The disclosure of this utility model will become more readily understood by referring to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings:
[0018] Figure 1 It is a 3D view of the spray arm;
[0019] Figure 2 This is a bottom view of the spray arm;
[0020] Figure 3 This is the front view of the spray arm.
[0021] Reference table for attached figures:
[0022] 1. Passage;
[0023] 2. Buffer section;
[0024] 30. Transverse center curve; 31. First protrusion; 311. Rear side of the first protrusion; 32. Second protrusion; 321. Rear side of the second protrusion; 322. Front side of the second protrusion; 33. Third protrusion; 331. Rear side of the third protrusion; 34. Fourth protrusion; 341. Rear side of the fourth protrusion; 35. Fifth protrusion; 351. Front side of the fifth protrusion; 36. Sixth protrusion; 361. Rear side of the sixth protrusion; 37. Seventh protrusion; 371. Front side of the seventh protrusion; 38. Eighth protrusion; 381. Rear side of the eighth protrusion;
[0025] 4. Nozzle;
[0026] 51. First water spray channel; 511. Rear end of the first water spray channel; 52. Second water spray channel; 521. Rear end of the second water spray channel; 522. Front end of the second water spray channel; 53. Third water spray channel; 54. Fourth water spray channel; 541. Rear end of the fourth water spray channel;
[0027] 6. First half of the spray arm;
[0028] 7. Second half of the spray arm. Detailed Implementation
[0029] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.
[0030] It is readily understood that, based on the technical solution of this utility model, various structural and implementation methods can be interchanged by those skilled in the art without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.
[0031] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the accompanying drawings. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meanings of the above-mentioned components within this utility model according to the specific circumstances.
[0033] refer to Figures 1-3 This embodiment provides a spray arm for a dishwasher. The interior of the spray arm has a cavity for receiving washing water. The spray arm includes a channel 1 located in the middle of the spray arm and extending through the upper and lower surfaces of the spray arm (for attachment). Figure 2 (For the perspective of the following viewpoints), the spray arm 1 is rotatably sleeved on the connecting shaft (not shown in the figure). A groove-shaped buffer part 2 is provided on both sides of the upper surface near the channel 1. A nozzle 4 is provided on the side wall away from the channel 1 in each buffer part 2. Multiple protrusions are also provided on the upper surface from the buffer part 2 to the end of the spray arm. Each protrusion is provided with at least one water spray channel.
[0034] The dishwasher spray arm provided in this embodiment has grooved buffer portions 2 on both sides of the upper surface of the spray arm near the channel 1, and nozzles are provided on the side wall of the buffer portion 2 away from the center of the spray arm. By setting the grooved buffer portion 2, the recessed buffer portion 2 plays a role in buffering and smoothing the swirling flow. As a result, the water flow on the side away from the center of the spray arm is buffered and smoothed by the buffer portion 2 to form a stable water flow. The water flow sprayed from the spray channel on the buffer portion 2 is evenly sprayed perpendicular to the spray arm, so that the area near the center of the spray arm can be sprayed with water flow, avoiding the formation of cleaning blind spots.
[0035] In addition, the interaction between the buffer section 2 and the protrusion allows the water sprayed from the nozzles and water spray channels on it to work together, thereby covering a wider area to be cleaned.
[0036] Specifically, the longitudinal section of the buffer part 2 has an arc-shaped profile, and the longitudinal section of the protrusion has an arc-shaped profile.
[0037] Specifically, in this embodiment, the buffer part 2 is hemispherical, and the protrusion is hemispherical.
[0038] In this embodiment, by setting the buffer part 2 to a hemispherical shape, it can better buffer and smooth out swirling stray water. By making the protrusion hemispherical, the water flow speed will increase when the water flows through the protruding nozzle, thereby increasing the water flow pressure. The greater water flow pressure can more effectively impact and remove stubborn stains on the tableware, such as dried food residue and grease, making the cleaning more thorough. In this embodiment, the cooperation between the buffer part 2 and the protrusion not only solves the problem of blind spots in cleaning, but also effectively impacts and removes stubborn stains on the tableware, allowing the dishwasher's spray arms to clean the tableware better.
[0039] Specifically, the spray arm includes a first half-spray arm 6 and a second half-spray arm 7 disposed on both sides of the channel 1. Among the multiple protrusions, two protrusions are a first protrusion 31 and a second protrusion 32. The first protrusion 31 and the second protrusion 32 are respectively disposed on the first half-spray arm 6 and the second half-spray arm 7. The first protrusion 31 is disposed adjacent to a buffer part 2, and the second protrusion 32 is disposed adjacent to another buffer part 2.
[0040] Specifically, based on the location and direction of the water spray channels, the multiple water spray channels are respectively the first water spray channel 51, the second water spray channel 52, the third water spray channel 53 and the fourth water spray channel 54. The first water spray channel 51 is located on the right side of the rear side 311 of the first protrusion 31 (the surface of the protrusion is divided into the front side and the rear side by the transverse center curve 30 of the spherical protrusion surface, the same below), and the rear end 511 of the first water spray channel 51 is far away from the channel 1.
[0041] Specifically, the front end 522 of the second water spray channel 52 intersects the transverse center curve 30 of the second protrusion 32, the second water spray channel 52 is located on the left side of the rear side 321 of the second protrusion 32, and the rear end 521 of the second water spray channel 52 is away from the channel 1.
[0042] In this embodiment, by setting the rear end 511 of the first water spray channel 51 away from the channel 1 and the rear end 521 of the second water spray channel 52 away from the channel 1, the water spraying directions of the first water spray channel 51 and the second water spray channel 52 are respectively tilted towards the rear of the first half-spray arm 6 and the second half-spray arm 7, and the water flow can be sprayed in a cross manner, thereby making up for the central area of the spray arm that cannot be covered by the two nozzles 4.
[0043] Specifically, the angles of the water jets from one nozzle 4 and the other nozzle 4 can be the same or different. In this embodiment, the angles of the water jets from the two nozzles 4 are different, so that when the user places the tableware in different ways, they can get water jets to meet the cleaning needs.
[0044] Specifically, the other protrusions among the multiple protrusions (besides the first and second protrusions) are the third protrusion 33, the fourth protrusion 34, the fifth protrusion 35, the sixth protrusion 36, the seventh protrusion 37, and the eighth protrusion 38. The third protrusion 33, the fourth protrusion 34, and the fifth protrusion 35 are disposed on the first half-spray arm 6, and the sixth protrusion 36, the seventh protrusion 37, and the eighth protrusion 38 are disposed on the second half-spray arm 7. The third protrusion 33, the fourth protrusion 34, the fifth protrusion 35, the sixth protrusion 36, and the seventh protrusion 37 are all provided with a third water spray channel 53 in the transverse direction, and the eighth protrusion 38 is provided with a fourth water spray channel 54.
[0045] Specifically, a third water spray channel 53 is provided on the rear side 331 of the third protrusion 33, the rear side 341 of the fourth protrusion 34, and the rear side 361 of the sixth protrusion 36, so that the water sprayed from the third water spray channel 53 can be directed toward the rear of the spray arm.
[0046] Specifically, a third water spray channel 53 is provided on the front side 322 of the second protrusion 32 and the front side 371 of the seventh protrusion 37. The water sprayed from the third water spray channel 53 can be directed toward the rear of the second half-spray arm 7.
[0047] Specifically, a third water spray channel 53 is disposed on the transverse center curve 30 of the fourth protrusion 34 and on the side of the fourth protrusion 34 away from the end of the first half-spray arm 6, so that the third water spray channel 53 can spray water perpendicular to the first half-spray arm 6.
[0048] Specifically, the fourth water spray channel 54 is located on the right side of the rear side 381 of the eighth protrusion 38, and the rear end 541 of the fourth water spray channel 54 is close to the end of the second half spray arm 7, so that the fourth water spray channel 54 can spray water at an angle toward the front of the second half spray arm 7.
[0049] The dishwasher spray arm provided in this embodiment, by setting a recessed buffer part 2, plays a role in buffering and smoothing the swirling and miscellaneous flow. As a result, the water flow on the side away from the center of the spray arm is buffered and smoothed by the buffer part 2, forming a stable water flow. The water flow sprayed from the spray channel on the buffer part 2 is uniformly sprayed perpendicularly to the spray arm, so that the area near the center of the spray arm can be sprayed with water flow, avoiding the formation of cleaning blind spots. By setting spray channels in different positions and directions, it is ensured that as much area as possible is covered during the rotation and spraying of water by the spray arm, so as to meet the cleaning needs.
[0050] The above are merely the principles and preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several other modifications can be made based on the principles of this utility model, and these modifications should also be considered within the scope of protection of this utility model.
Claims
1. A spray arm of a dishwasher, the interior of the spray arm forming a cavity for containing washing water, said spray arm comprising a channel (1) located in the middle and extending through the upper and lower surfaces of the spray arm, said spray arm being rotatably sleeved on a connecting shaft, characterized in that, A recessed buffer part (2) is arranged on each side of the upper surface near the channel (1), a nozzle (4) is arranged on the side wall away from the channel (1) in each buffer part (2), and a plurality of protrusions are arranged on the upper surface of the buffer part (2) to the end of the spray arm, and at least one water spraying channel is arranged on each protrusion.
2. The spray arm of the dishwasher according to claim 1, characterized in that, The longitudinal section profile of the buffer part (2) is arc-shaped, and the longitudinal section profile of the protrusion is arc-shaped.
3. The spray arm of the dishwasher according to claim 2, characterized in that, The buffer part (2) is hemispherical, and the protrusion is hemispherical. 4.The spray arm of the dish washer according to claim 3, characterized in that, The first half spray arm (6) and the second half spray arm (7) are arranged on both sides of the channel (1).
5. The spray arm of the dishwasher according to claim 4, characterized in that, Two protrusions in the plurality of protrusions are a first protrusion (31) and a second protrusion (32), respectively, and the first protrusion (31) and the second protrusion (32) are arranged on the first half spray arm (6) and the second half spray arm (7), respectively, the first protrusion (31) is arranged adjacent to one buffer part (2), and the second protrusion (32) is arranged adjacent to another buffer part (2). 6.The spray arm of the dish washer according to claim 5, characterized in that, Two water spraying channels in the plurality of water spraying channels are a first water spraying channel (51) and a second water spraying channel (52), the first water spraying channel (51) is arranged on the right area of the rear side of the first protrusion (31), and the rear end of the first water spraying channel (51) is away from the channel (1).
7. The spray arm of the dishwasher according to claim 6, characterized in that, The front end of the second water spraying channel (52) intersects with the transverse center curve (30) of the second protrusion (32), the second water spraying channel (52) is arranged on the left area of the rear side of the second protrusion (32), and the rear end (521) of the second water spraying channel (52) is away from the channel (1).