Spraying arm, dish washing machine and control method of dish washing machine

Abstract

The invention relates to the technical field of cleaning equipment, and discloses a spraying arm, a dish-washing machine and a control method of the dish-washing machine, the spraying arm comprises a spraying arm main body and a drainage structure, the top of the spraying arm is provided with a water inlet, and the spraying arm main body is internally provided with a water flow channel communicated with the water inlet; a lower spraying hole communicated with the water flow channel is formed in the bottom of the spraying arm main body; the bottom face of the water flow channel is provided with an annular protruding part surrounding the lower spraying hole by a circle. The drainage structure comprises a drainage opening and a blocking piece, the drainage opening is formed in the bottom face of the water flow channel, and the blocking piece is located at the drainage opening. The plugging piece is provided with a closing position and a drainage position, and the drainage opening is closed by the plugging piece at the closing position; and at the drainage position, the plugging piece does not close the drainage opening. According to the spraying arm, the annular protruding part is arranged on the periphery of the lower spraying hole, water can be prevented from flowing out of the lower spraying hole after spraying is finished, water drainage is achieved in cooperation with the water drainage opening, and water dripping of the spraying arm is avoided; meanwhile, the drain opening is sealed during spraying, and water pressure loss can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of cleaning equipment, and in particular to a spray arm, a dishwasher and a control method of the dishwasher. Background Art

[0002] As people's quality of life continues to improve, dishwashers have gradually become a common household appliance, mainly used to clean and dry dishes and other tableware. Dishwashers can achieve multi-directional cleaning through bottom spray, top spray, and middle spray.

[0003] At present, the spray holes of the top spray arm and the middle spray arm facing downward are groove structures, but the angle of the spray arm cannot be guaranteed. The small inclination angle leads to local water accumulation. When the user pulls out the middle rack after the washing program, the spray arm drips, causing secondary contamination of the tableware. Even if the inclination of the spray arm is changed, there will still be local water overflow, and increasing the inclination too much will reduce the effective space inside the dishwasher, limiting the internal capacity and tableware. Summary of the invention

[0004] Based on the technical problem of dripping from the spray arm in the prior art, the present invention provides a spray arm, a dishwasher and a control method for the dishwasher. An annular protrusion is arranged around the lower spray hole of the spray arm, which can prevent water from flowing out of the lower spray hole after spraying. At the same time, the drain port is cooperated to drain water to avoid dripping from the spray arm; at the same time, the drain port is sealed during spraying to reduce water pressure loss.

[0005] The present invention provides a spray arm, comprising: The spray arm body has a water inlet at the top, and a water flow channel connected to the water inlet is arranged inside the spray arm body; a lower spray hole connected to the water flow channel is arranged at the bottom of the spray arm body; and an annular protrusion arranged around the lower spray hole is arranged on the bottom surface of the water flow channel; The drainage structure includes a drainage port and a plugging member, wherein the drainage port is opened on the bottom surface of the water flow channel, and the plugging member is located at the drainage port; the plugging member has a closed position and a drainage position, when in the closed position, the plugging member closes the drainage port; when in the drainage position, the plugging member does not close the drainage port.

[0006] In some embodiments, the blocking member comprises: A blocking portion, arranged above the drain port; An elastic part, connecting the blocking part and the spray arm body; When water enters the spray arm, the water flow pressure causes the elastic part to deform, pressing the blocking part onto the drain port, so that the blocking part is located in the closed position to close the drain port; when the spray arm closes the water inlet, the elastic part resets the blocking part, so that the blocking part is located in the drain position to open the drain port.

[0007] In some embodiments, the elastic portion includes a plurality of elastic support arms, the plurality of elastic support arms are arranged around the blocking portion, and the bottom ends of the elastic support arms are fixed to the spray arm body.

[0008] In some embodiments, the upper end of the blocking portion is connected to the elastic support arm, and the lower end of the blocking portion has an insertion end that can be inserted into the drain port.

[0009] In some embodiments, the blocking member is a rubber member, which is connected to the spray arm body by two-color injection molding; or a mounting hole is provided on the spray arm body, and the elastic support arm is fixed in the mounting hole.

[0010] In some embodiments, the drain port is disposed close to the water inlet.

[0011] In some embodiments, The water inlet comprises an upper water inlet and a lower water inlet; The water flow channel includes an upper water flow channel and a lower water flow channel that are independent of each other; the lower water flow channel is connected to the lower water inlet and the lower spray hole, and the drainage structure is arranged in the lower water flow channel; the upper water flow channel is connected to the upper water inlet, and an upper spray hole connected to the upper water flow channel is opened on the top of the spray arm body.

[0012] In some embodiments, the bottom surface of the upper water flow channel is provided with the drainage structure.

[0013] The present invention also provides a dishwasher, comprising the above-mentioned spray arm.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are: The above-mentioned spray arm has an annular protrusion around the lower spray hole, which can prevent water from flowing out of the lower spray hole after spraying. At the same time, it cooperates with the drain port to drain water, which can avoid dripping from the spray arm and avoid secondary pollution. A sealing piece is provided at the drain port, which can block the drain port during spraying, reduce water pressure loss, and improve cleaning efficiency. The drain port is opened after spraying to drain water and avoid water accumulation inside the spray arm.

[0015] The present invention further provides a control method for a dishwasher, wherein the dishwasher comprises the above-mentioned spray arm, and the control method comprises: The spray arm is controlled to spray upward or downward or downward, and after spraying is completed, the spray arm is controlled to spray upward for a preset time.

[0016] The control method described above increases the upper spraying after the spraying is finished, so that the spray arm rotates and the water in the lower water flow channel is discharged by rotating and shaking, thereby achieving the purpose of reducing the water accumulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0018] Figure 1 is a stereoscopic diagram of the spray arm of the present invention; Figure 2 is a top view of the spray arm of the present invention; Figure 3 An exploded view of the spray arm of the present invention; Figure 4 It is a structural schematic diagram of the lower shell of the spray arm main body in the spray arm of the present invention; Figure 5 for Figure 4 A top view of the invention, in which arrows indicate the direction of water flow in the water flow channel; Figure 6 It is a schematic structural diagram of the lower spray hole and the annular protrusion in the spray arm of the present invention; Figure 7 It is a structural schematic diagram of the water discharge structure in the spray arm of the present invention; Description of reference numerals: Spray arm body 100; Upper shell 110; upper spray hole 111; Lower shell 120; lower spray hole 121; annular protrusion 122; Water inlet 130; upper water inlet 131; lower water inlet 132; Circular groove 140; Drainage structure 200; Drain 210; The blocking member 220 , the blocking portion 221 , the elastic portion 222 , the transverse connecting portion 2221 , and the column portion 2222 . DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it is necessary to understand that the terms "center", "up", "down", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0022] Reference Figure 1-Figure 7 , which is an embodiment of the spray arm of the present invention.

[0023] The spray arm includes a spray arm body 100 and a water discharge structure 200 disposed in the spray arm body 100 .

[0024] The top of the spray arm body 100 is provided with a water inlet 130, and the inside of the spray arm body 100 is provided with a water flow channel connected to the water inlet 130. The bottom of the spray arm body 100 is provided with a lower spray hole 121 connected to the water flow channel. Figure 4 and Figure 6 As shown, the bottom surface of the water flow channel is provided with an annular protrusion 122 arranged around the lower spray hole 121.

[0025] See also Figure 7 The drainage structure 200 includes a drainage port 210 and a plugging member 220. The drainage port 210 is provided on the bottom surface of the water flow channel, and the drainage port 210 is communicated with the water flow channel. The plugging member 220 is located at the drainage port 210. The plugging member 220 has a closed position and a drainage position. When in the closed position, the plugging member 220 closes the drainage port 210; when in the drainage position, the plugging member 220 does not close the drainage port 210, and the drainage port 210 is open.

[0026] When the spray arm is working, the blocking member 220 is located in the closed position, closing the drain port 210 to achieve a sealing effect and reduce water pressure loss.

[0027] When the spraying is finished, the blocking member 220 is located at the draining position, and the drain port 210 is opened. The annular protrusion 122 around the lower spray hole 121 can effectively block the water flow, preventing water from flowing out of the lower spray hole 121. The water flows out of the drain port 210 through the inclined design of the spray arm. Because the position of the annular protrusion 122 also plays a role in connecting to the atmospheric pressure, it can ensure that the drain port 210 can drain water smoothly to achieve the purpose of not retaining water.

[0028] In the above-mentioned spray arm, an annular protrusion 122 is provided around the lower spray hole 121, which can prevent water from flowing out of the lower spray hole 121 after spraying. At the same time, the drain port 210 is cooperated to achieve water drainage, which can avoid dripping from the spray arm and avoid secondary pollution; a sealing member 220 is provided at the drain port 210, which can block the drain port 210 during spraying, reduce water pressure loss, and improve cleaning efficiency. After spraying, the drain port 210 is opened to drain water and avoid water accumulation inside the spray arm.

[0029] See below for further reference Figure 1-7 , the spray arm of the present invention is described in detail.

[0030] The spray arm in this embodiment is a single self-rotating spray arm, and the specific spray arm is a middle spray structure, which can realize upward and downward spraying. It should be pointed out that the spray arm can also be a top spray structure to realize downward spraying.

[0031] In this embodiment, the spray arm includes a spray arm body 100 , a water inlet 130 is disposed on the top of the spray arm body 100 , and a water flow channel communicating with the water inlet 130 is disposed inside the spray arm body 100 .

[0032] The water inlet 130 includes an upper water inlet 131 and a lower water inlet 132, and the water flow channel includes an upper water flow channel A and a lower water flow channel B which are independent of each other. Figure 5 The upper water inlet 131 is connected to the upper water flow channel A, and the lower water inlet 132 is connected to the lower water flow channel B.

[0033] The spray arm body 100 is in a double-arm cross shape, and the upper water flow channel A and the lower water flow channel B are respectively arranged in one of the cross arms. The upper water inlet 131 and the lower water inlet 132 are arranged at the center of the spray arm. The spray arm body 100 is formed by buckling an upper shell 110 and a lower shell 120.

[0034] An upper spray hole 111 is provided at the top of the spray arm body 100 , and the upper spray hole 111 is communicated with the upper water flow channel A. A lower spray hole 121 is provided at the bottom of the spray arm body 100 , and the lower spray hole 121 is communicated with the lower water flow channel B.

[0035] The spray arm body 100 rotates under the action of the spraying water flow, and can realize independent upward spraying and downward spraying by setting two independent water flow channels.

[0036] In order to prevent the spray arm body 100 from dripping water after the spraying is finished, an annular protrusion 122 is arranged around the lower spray hole 121 and on the bottom surface of the lower water flow channel B. The annular protrusion 122 is consistent in shape with the lower spray hole 121 to minimize the risk of water accumulation; the top of the annular protrusion 122 is designed as an inclined surface to reduce the top area and reduce water accumulation. After the spray arm sprays and washes, the annular protrusion 122 can effectively block the water flow and prevent water from flowing out of the lower spray port.

[0037] In order to drain the residual water inside the spray arm, a water discharge structure 200 is provided in the lower water flow channel B.

[0038] Specifically, Figure 7 As shown, the drainage structure 200 includes a drainage port 210 opened on the bottom surface of the lower water flow channel B and a blocking member 220 arranged at the drainage port 210 .

[0039] The blocking member 220 includes a blocking portion 221 and an elastic portion 222. The blocking portion 221 is disposed above the drain port 210; the elastic portion 222 connects the blocking portion 221 and the spray arm body 100.

[0040] When water enters the spray arm, the water pressure deforms the elastic part 222, pressing the blocking part 221 onto the drain port 210, so that the blocking part 220 is located at the closed position to close the drain port 210 and reduce water pressure loss. When the spray arm is closed to water inlet, the elastic part 222 resets the blocking part 221, so that the blocking part 220 is located at the drain position to open the drain port 210 and discharge the residual water inside the spray arm.

[0041] In this embodiment, the elastic part 222 includes a plurality of elastic support arms, which are arranged around the blocking part 221, and the bottom ends of the elastic support arms are fixed to the spray arm body 100. The size of the blocking part 221 is larger than the size of the drain port 210, the upper end of the blocking part 221 is connected to the elastic support arm, and the lower end of the blocking part 221 has an insertion end that can be inserted into the drain port 210. In this embodiment, the drain port 210 is a circular hole, and the blocking part 221 matches the shape of the drain port. The bottom insertion end thereof is a hemispherical or conical structure, which can be inserted into the drain port 210 under the action of water pressure, and fits tightly around the drain port 210 to achieve sealing.

[0042] In this embodiment, the elastic support arm includes a transverse connecting portion 2221 and a column portion 2222. The column portion 2222 of the elastic support arm plays a supporting role, and the transverse connecting portion 2221 connects the column portion 2222 and the blocking portion 221 to provide elastic deformation.

[0043] The blocking member 220 is preferably a rubber integrated member, and the blocking member 220 and the spray arm body 100 can be fixedly connected by two-color injection molding. In another embodiment, the blocking member 220 can be a separate component, which is fixedly mounted on the spray arm body 100. For example, a mounting hole is provided on the spray arm body 100, and the elastic support arm is fixed in the mounting hole.

[0044] In other embodiments, the blocking member 220 may also be in a shape, such as the blocking portion 221 is tilted, one side is connected to the spray arm body 100, and the other side is supported by the elastic support arm. The blocking member 220 may also be in other structural forms, such as the elastic portion 222 adopts a spring or spring sheet structure, and the blocking portion 221 is a sheet structure, which is connected to the spray arm body 100 through a spring or spring sheet.

[0045] The water inlet 130 in this embodiment is arranged near the rotation center of the spray arm body 100, and the water drain 210 is arranged near the water inlet 130. The water flow and water pressure at the water inlet 130 are large, and the spray arm can easily press the blocking member 220 onto the lower spray hole to achieve sealing when working.

[0046] Furthermore, in order to facilitate the residual water to flow out from the drain port 210, the spray arm body 100 is provided with an inclined angle to deflect toward the drain port 210, so that the residual water can flow toward the drain port 210. The drain port 210 in this embodiment is arranged close to the rotation center of the spray arm body 100, so that the spray arm body 100 can be arranged downwardly from both ends to the center. In another embodiment, if the drain port 210 is vertically disposed at both ends of the spray arm body 100, the spray arm body 100 can be arranged downwardly from the center to both ends.

[0047] In this embodiment, the upper water inlet 131 is a circular water inlet 130, which is located at the center of the spray arm body 100. The water entering from the upper water inlet 131 flows to the two ends of a cross arm respectively, that is, the upper water flow channel A extends along the length direction of a cross arm of the spray arm body 100. There are two lower water inlets 132, which are respectively located on the outside of the upper water inlet 131. The lower water flow channel B in the other cross arm of the spray arm body 100 is divided into two sections by the upper water flow channel A. The lower water flow channels B at both ends are respectively connected to the lower water inlet 132 to achieve water intake. A downwardly concave circular groove 140 can be set at the center of the spray arm body 100 and at the intersection of the upper water flow channel A and the lower water flow channel B, as shown in FIG. Figure 4 and Figure 5The circular groove 140 can collect water, and the water discharge structure 200 is disposed in the circular groove 140 to facilitate water discharge.

[0048] See also Figure 4 A drainage structure 200 is also provided on the bottom surface of the upper water flow channel A, which can discharge the residual water in the upper water flow channel A.

[0049] It should be noted that the upper spray hole 111 and the lower spray hole 121 on the spray arm body 100 may include straight spray holes that spray water vertically up and down, and inclined spray holes that can spray water at an angle to provide a driving force for the spray arm to rotate.

[0050] The present invention also includes a dishwasher, which includes the above-mentioned spray arm. The spray arm is a middle spray structure, which can be arranged in the middle of the dishwasher to spray upward or downward or spray upward and downward at the same time. The spray arm can also be a top spray structure, with only the lower spray hole 121 arranged to spray downward.

[0051] The dishwasher of the present invention is provided with the spray arm. The spray arm is provided with an annular protrusion 122 around the lower spray hole 121. After spraying, water can be prevented from flowing out of the lower spray hole 121. At the same time, the drain port 210 is cooperated to achieve water drainage, which can prevent the spray arm from dripping after washing and avoid secondary contamination of tableware. The drain port 210 is provided with a blocking member 220, which can block the drain port 210 during spraying, reduce water pressure loss, and improve washing efficiency. After spraying, the drain port 210 is opened to drain water and avoid water accumulation in the spray arm.

[0052] The present invention also provides a control method for a dishwasher, wherein the dishwasher has the above-mentioned spray arm, wherein the spray arm has an upper spray mode for spraying water upward, a lower spray mode for spraying water downward, and a two-way spray mode for spraying water upward and downward (which can spray water in both directions at the same time or spray up and down at intervals).

[0053] The control method specifically includes: controlling the spray arm to spray upward and downward or downward, and after spraying, controlling the spray arm to spray upward for a preset time. That is, after spraying, by adding an upward spray, the spray arm rotates, and the water in the lower water flow channel is discharged by rotating and shaking, so as to achieve the purpose of reducing the water accumulation.

[0054] The washing process of the dishwasher of the present invention is specifically as follows: After the dishwasher starts washing, select the washing mode; When the lower spray mode or two-way spray mode is selected, the spray arm works. After washing, the program starts to run the upper spray mode for a certain period of time and then stops working, so that the spray arm can reduce water accumulation through rotation and shaking to avoid dripping from the lower spray hole; When the upper spray mode is selected, there is no water flow in the lower water flow channel, and there is no need to start the upper spray mode separately after the program ends.

[0055] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A spray arm, characterized in that: include: The spray arm body has a water inlet at the top, and a water flow channel communicating with the water inlet is arranged inside the spray arm body; A lower spray hole connected to the water flow channel is provided at the bottom of the spray arm body; an annular protrusion arranged around the lower spray hole is provided on the bottom surface of the water flow channel; The drainage structure includes a drainage port and a plugging member, wherein the drainage port is opened on the bottom surface of the water flow channel, and the plugging member is located at the drainage port; the plugging member has a closed position and a drainage position, when in the closed position, the plugging member closes the drainage port; when in the drainage position, the plugging member does not close the drainage port.

2. The spray arm according to claim 1, characterized in that: The blocking member comprises: A blocking portion, arranged above the drain port; An elastic part, connecting the blocking part and the spray arm body; When water enters the spray arm, the water flow pressure causes the elastic part to deform, pressing the blocking part onto the drain port, so that the blocking part is located in the closed position to close the drain port; when the spray arm closes the water inlet, the elastic part resets the blocking part, so that the blocking part is located in the drain position to open the drain port.

3. The spray arm according to claim 2, characterized in that: The elastic part comprises a plurality of elastic support arms, the plurality of elastic support arms are arranged around the blocking part, and the bottom ends of the elastic support arms are fixed on the spray arm body.

4. The spray arm according to claim 3, characterized in that: The upper end of the blocking portion is connected to the elastic support arm, and the lower end of the blocking portion has an insertion end that can be inserted into the drain port.

5. The spray arm according to claim 4, characterized in that: The blocking piece is a rubber piece, and is connected to the spray arm body by two-color injection molding; or a mounting hole is provided on the spray arm body, and the elastic support arm is fixed in the mounting hole.

6. The spray arm according to claim 1, characterized in that: The water drain port is arranged close to the water inlet.

7. The spray arm according to any one of claims 1 to 6, characterized in that: The water inlet comprises an upper water inlet and a lower water inlet; The water flow channel includes an upper water flow channel and a lower water flow channel that are independent of each other; the lower water flow channel is connected to the lower water inlet and the lower spray hole, and the drainage structure is arranged in the lower water flow channel; the upper water flow channel is connected to the upper water inlet, and an upper spray hole connected to the upper water flow channel is opened on the top of the spray arm body.

8. The spray arm according to claim 7, characterized in that: The bottom surface of the upper water flow channel is provided with the water discharge structure.

9. A dishwasher, characterized in that: Comprising a spray arm as described in any one of claims 1-8.

10. A method for controlling a dishwasher, characterized in that: The dishwasher comprises the spray arm according to claim 6, and the control method comprises: The spray arm is controlled to spray upward or downward or downward, and after spraying is completed, the spray arm is controlled to spray upward for a preset time.

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