Spray arm of a cleaning machine

Abstract

The present invention relates to a spray arm of a cleaning machine, comprising a spray arm body, a water collecting chamber formed in the middle of the spray arm body, main channels extending along the length direction of the spray arm body are connected to the two sides of the water collecting chamber, a first spray hole connected to the main channel is formed on the side wall of the spray arm body, an auxiliary channel extending from the main channel to the top of the water collecting chamber is formed on the side wall of the spray arm body, and a second spray hole connected to the auxiliary channel is formed in the central part of the spray arm body. The present invention forms an auxiliary channel extending from the main channel to the top of the water collecting chamber on the side wall of the spray arm body, and a second spray hole connected to the auxiliary channel is formed in the central part of the spray arm body. In this way, under the premise that the rotating arms on both sides of the spray arm are covered with the first spray hole, the defect that the central area of ​​the spray arm cannot discharge water is compensated, so that the water discharge range of the spray arm can cover various areas above it, thereby improving the cleaning effect.

Description

Technical Field

[0001] The invention relates to a spray arm of a cleaning machine. Background Art

[0002] A dishwasher (washing machine) is a device that sprays cold or hot water onto dishes to remove dirt adhered to the dishes and clean the dishes. The dishes are placed in a dish rack in a dishwashing cabinet, and a general dishwasher includes a pump and a spray arm that sprays washing water.

[0003] The spray arm structure in the existing water tank cleaning machine is as follows Figure 1 As shown in the figure, there are spray holes on the rotating arm of the spray arm, but no spray head is set in the middle area of ​​the spray arm, which is mainly due to the pressure demand in the middle area of ​​the spray arm. However, such a structure leads to a certain "blind spot" in the middle area of ​​the washing machine during the cleaning process. Even if the spray holes on both sides of the spray arm have a cross-convergence effect above the spray arm, the water flow is diffused due to insufficient force, resulting in the problem of poor cleaning of the tableware above the middle area of ​​the spray arm.

[0004] Therefore, further improvements are needed for the current spray arm structure. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a spray arm of a cleaning machine with improved cleaning effect by adding spray holes in the middle area in view of the current status of the prior art.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a spray arm of a cleaning machine, comprising a spray arm body, a water collecting chamber is formed in the middle part of the spray arm body, and the two sides of the water collecting chamber are respectively connected to main channels extending along the length direction of the spray arm body, and the connection between the water collecting chamber and the main channel constitutes the throat part of the spray arm body, and a first spray hole connected to the main channel is formed on the side wall of the spray arm body. It is characterized in that: an auxiliary flow channel extending from the main flow channel to the top of the water collecting chamber is formed on the side wall of the spray arm body, and a second spray hole connected to the auxiliary flow channel is formed in the central part of the spray arm body.

[0007] In the above solution, the auxiliary flow channel is convexly arranged on the outer wall of the spray arm body, and the inner wall of the auxiliary flow channel corresponding to the main flow channel is kept smooth. The inner wall surface of the main flow channel maintains the original smooth structure to avoid affecting the water flow velocity of the main flow channel and ensure that the first spray hole has sufficient spraying force.

[0008] Preferably, according to the flow direction of the water flow, the liquid inlet of the auxiliary flow channel is located downstream of the corresponding throat portion and upstream of the corresponding first spray hole. When the water flow in the main channel is sprayed out from the first spray hole, the water flow pressure will decrease accordingly. The liquid inlet of the auxiliary flow channel is arranged downstream of the corresponding throat portion and upstream of the corresponding first spray hole. Under the premise of not affecting the water inlet pressure of the water collecting chamber, the auxiliary flow channel can be provided with the largest possible water pressure, thereby increasing the spray force of the water out of the second spray hole and thus improving the cleaning effect.

[0009] As an improvement, the auxiliary flow channel includes a straight segment and an arc segment connected in sequence along the direction of water flow, and the connection between the straight segment and the arc segment is tangentially connected, the arc segment is arranged near the central part of the top wall of the spray arm body, and the second spray hole is opened on the arc segment. The upstream of the auxiliary flow channel adopts a straight segment, which can deliver the water flow to the central part of the spray arm body under the premise of minimizing the loss of water pressure, and the downstream of the auxiliary flow channel is set as an arc segment, and the second spray hole is opened on the arc segment, so that the water flow can rush out of the second spray hole under the impact of the sudden interruption of the water flow, thereby improving the spray force of the water out of the second spray hole and further improving the cleaning effect.

[0010] Preferably, a concave area is formed in the central part of the top wall of the spray arm body, the end edge of the straight segment is arranged close to the outer edge of the concave area, and the arc segment is arranged around and close to the outer edge of the concave area. Such a structure is adopted to make the water flow cover a wider range.

[0011] It is further preferred that the second spray hole is opened at the end of the arc segment, and the end of the arc segment has a vertically arranged inner wall, and the axis of the second spray hole is inclined from the inner wall to the upstream of the auxiliary flow channel. The angle between the axis of the second spray hole and the inner wall is 10° to 40°. The above structure is conducive to the water flow rushing out of the second spray hole under the impact of the sudden interruption of the water flow, thereby improving the spray force of the water out of the second spray hole.

[0012] Preferably, there are two auxiliary flow channels, each of which is connected to a main flow channel, and the second spray holes at the end of each auxiliary flow channel are symmetrically arranged on both sides of the concave area and inclined in opposite directions. Such a structure is conducive to making the water flow cover a wider range.

[0013] In order to increase the impact force of water outlet, the inner diameter of the second spray hole gradually decreases along the water flow direction.

[0014] In the above schemes, a water inlet connected to the water collecting chamber is opened on the bottom wall of the spray arm body.

[0015] Compared with the prior art, the advantages of the present invention are: an auxiliary flow channel extending from the main flow channel to the top of the water collecting chamber is formed on the side wall of the spray arm body, and a second spray hole connected to the auxiliary flow channel is opened in the central part of the spray arm body. In this way, on the premise that the rotating arms on both sides of the spray arm are covered with the first spray holes, the defect that water cannot flow out from the central area of ​​the spray arm is compensated, so that the water output range of the spray arm can cover all areas above it, thereby improving the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the background technology of the present invention;

[0017] Figure 2 It is a structural schematic diagram of an embodiment of the present invention;

[0018] Figure 3 It is a partial structural schematic diagram of an embodiment of the present invention;

[0019] Figure 4 for Figure 2 A cross-sectional view of

[0020] Figure 5 Schematic diagram of the distribution structure of auxiliary flow channels in an embodiment of the present invention. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below with reference to the accompanying drawings.

[0022] like Figures 2 to 5 As shown, the spray arm of the cleaning machine of this embodiment includes a spray arm body 1, and the spray arm body 1 extends from the central part to both sides along the length direction to form two rotating arms 11 of the spray arm. The middle part of the spray arm body 1 is hollow inside to form a water collecting chamber 10, and a water inlet 101 connected to the water collecting chamber 10 is opened on the bottom wall of the spray arm body 1. The two sides of the water collecting chamber 10 are respectively connected to the main flow channel 12 extending along the length direction of the spray arm body 1 and formed on the rotating arm 11, and the connection between the water collecting chamber 10 and the main flow channel 12 constitutes the throat part 13 of the spray arm body 1, and a plurality of first spray holes 121 arranged at intervals are respectively opened on the top walls of the two rotating arms 11, and each first spray hole 121 is respectively connected to the corresponding main flow channel 12.

[0023] In this embodiment, an auxiliary flow channel 14 extending from the main flow channel 12 to the top of the water collecting chamber 10 is formed on the top wall of the spray arm body 1, and a second spray hole 141 connected to the auxiliary flow channel 14 is opened in the central part of the spray arm body 1. The auxiliary flow channel 14 is convexly arranged on the outer wall of the spray arm body 1, and the inner wall of the auxiliary flow channel 14 corresponding to the main flow channel 12 is kept smooth, so that the inner wall surface of the main flow channel 12 maintains the original smooth structure to avoid affecting the water flow velocity of the main flow channel 12 and ensure that the first spray hole 121 has sufficient spraying force. According to the flow direction of the water flow, the liquid inlet 142 of the auxiliary flow channel 14 is located downstream of the corresponding throat part 13 and upstream of the corresponding first spray hole 121. When the water flow in the main channel 12 is sprayed out from the first spray hole 121, the water flow pressure will decrease accordingly. The liquid inlet 142 of the auxiliary channel 14 is arranged downstream of the corresponding throat part 13 and upstream of the corresponding first spray hole 121. Under the premise of not affecting the water inlet pressure of the water collecting chamber 10, the auxiliary channel 14 can be provided with the greatest possible water pressure, thereby increasing the spray force of the water outflowing from the second spray hole 141 and thus improving the cleaning effect.

[0024] The auxiliary flow channel 14 of this embodiment includes a straight segment 143 and an arc segment 144 connected in sequence along the water flow direction, and the connection between the straight segment 143 and the arc segment 144 is tangentially connected. The arc segment 144 is arranged near the central part of the top wall of the spray arm body 1, and the second spray hole 141 is opened on the arc segment 144. Specifically, a concave area 100 is formed in the central part of the top wall of the spray arm body 1, the starting end of the straight segment 143 is located on the center line of the corresponding main flow channel 12, the terminal edge of the straight segment 143 is arranged near the outer edge of the concave area 100, and the arc segment 144 is arranged around and near the outer edge of the concave area 100. The second spray hole 141 is opened at the end of the arc segment 144, and the end of the arc segment 144 has a vertically arranged inner wall 1441, and the axis of the second spray hole 141 is inclined from the inner wall to the upstream of the auxiliary flow channel 14. The angle a between the axis of the second spray hole 141 and the inner wall 1441 is 10° to 40°. The upstream of the auxiliary flow channel 14 adopts a straight section 143, which can deliver the water flow to the central part of the spray arm body 1 under the premise of minimizing the loss of water pressure, and the downstream of the auxiliary flow channel 14 is set as an arc section 144, and the second spray hole 141 is opened at the end of the arc section 144, so that the water flow can rush out of the second spray hole 141 under the impact of the sudden interruption of the water flow, thereby improving the spray force of the water out of the second spray hole 141 and further improving the cleaning effect. In this embodiment, there are two auxiliary flow channels 14 respectively connected to a main channel 12, and the second spray holes 141 at the end of each auxiliary flow channel 14 are symmetrically arranged on both sides of the concave area 100 and inclined in opposite directions. Such a structure is conducive to making the water flow cover a wider range.

[0025] In this embodiment, an auxiliary flow channel 14 extending from the main flow channel 12 to the top of the water collecting chamber 10 is formed on the side wall of the spray arm body 1, and a second spray hole 141 connected to the auxiliary flow channel 14 is opened in the central part of the spray arm body 1. In this way, on the premise that the rotating arms 11 on both sides of the spray arm are covered with the first spray holes 121, the defect that the central area of ​​the spray arm cannot discharge water is compensated, so that the water outlet range of the spray arm can cover various areas above it, thereby improving the cleaning effect.

Claims

1. A spray arm of a cleaning machine, comprising a spray arm body (1), a water collecting chamber (10) formed in the middle of the spray arm body (1), both sides of the water collecting chamber (10) are respectively connected to main flow channels (12) extending along the length direction of the spray arm body (1), and a first spray hole (121) connected to the main flow channel (12) is opened on the side wall of the spray arm body (1), characterized in that: An auxiliary flow channel (14) extending from the main flow channel (12) to the top of the water collecting chamber (10) is formed on the side wall of the spray arm body (1), and a second spray hole (141) connected to the auxiliary flow channel (14) is opened in the central part of the spray arm body (1); The auxiliary flow channel (14) is protrudingly arranged on the outer side wall of the spray arm body (1), and the inner wall of the main flow channel (12) corresponding to the auxiliary flow channel (14) is kept smooth; The auxiliary flow channel (14) comprises a straight section (143) and an arc section (144) which are connected in sequence along the direction of water flow, and the connection between the straight section (143) and the arc section (144) is tangentially connected, the arc section (144) is arranged close to the central part of the top wall of the spray arm body (1), and the second spray hole (141) is opened on the arc section (144); a concave area (100) is formed in the central part of the top wall of the spray arm body (1), the end edge of the straight section (143) is arranged close to the outer edge of the concave area (100), and the arc section (144) is arranged around and close to the outer edge of the concave area (100).

2. The spray arm of the cleaning machine according to claim 1, characterized in that: The connection between the water collecting chamber (10) and the main flow channel (12) forms the throat portion (13) of the spray arm body (1). According to the flow direction of the water, the liquid inlet (142) of the auxiliary flow channel (14) is located downstream of the corresponding throat portion (13) and upstream of the corresponding first spray hole (121).

3. The spray arm of the cleaning machine according to claim 1, characterized in that: The second spray hole (141) is opened at the end of the arc segment (144), and the end of the arc segment (144) has a vertically arranged inner wall (1441), and the axis of the second spray hole (141) is inclined from the inner wall (1441) toward the upstream of the auxiliary flow channel (14).

4. The spray arm of the cleaning machine according to claim 3, characterized in that: The angle (a) between the axis of the second spray hole (141) and the inner wall (1441) is 10° to 40°.

5. The spray arm of the cleaning machine according to claim 1, characterized in that: There are two auxiliary flow channels (14) respectively connected to a main flow channel (12); the second spray holes (141) at the end of each auxiliary flow channel (14) are symmetrically arranged on both sides of the concave area (100) and have opposite inclination directions.

6. The spray arm of a cleaning machine according to any one of claims 1 to 5, characterized in that: The inner diameter of the second spray hole (141) gradually decreases along the water flow direction.

7. The spray arm of a cleaning machine according to any one of claims 1 to 5, characterized in that: A water inlet (101) connected to the water collecting chamber (10) is formed on the bottom wall of the spray arm body (1).

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