Spraying arm device and dish washing machine

Abstract

The invention provides a gushing arm device and dishwasher wherein the gushing arm device comprises a gushing arm, an energy conversion assembly and an energy storage member, the gushing arm comprises a gushing arm shaft, the energy conversion assembly is used for converting kinetic energy of the gushing arm into electric energy when the dishwasher is in a washing stage, and the energy storage member is connected with the gushing arm shaft. The energy storage part is used for storing the electric energy generated by the energy conversion assembly. The dish-washing machine is used for solving the technical problems that energy is wasted and energy consumption is not favorably saved in the dish-washing machine.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliance technology, and more particularly to a spray arm device and a dishwasher. Background Technology

[0002] As an indispensable household appliance in modern families, dishwashers have greatly improved people's quality of life and convenience.

[0003] Current dishwashers generally use the reaction force of water flow to drive the spray arms to rotate and spray, thus completing the thorough spraying and cleaning of the dishes. During the drying stage, they usually rely on the operation of fans to dry the dishes. While this design is effective, it wastes energy and is not conducive to energy conservation.

[0004] Therefore, it is urgent to solve the technical problems of dishwashers, which waste energy and are not conducive to energy conservation. Summary of the Invention

[0005] This invention provides a spray arm device and a dishwasher to solve the technical problem that dishwashers waste energy and are not conducive to energy conservation.

[0006] To achieve the above objectives, the present invention provides a spray arm device, comprising:

[0007] Spray arm, the spray arm including a spray arm shaft;

[0008] An energy conversion component for converting the kinetic energy of the spray arm into electrical energy during the washing phase of the dishwasher;

[0009] An energy storage device for storing electrical energy generated by the energy conversion component.

[0010] The spray arm device provided in this application, by setting an energy conversion component and an energy storage component, enables the energy conversion component to convert the kinetic energy of the spray arm into electrical energy when the dishwasher is in the washing stage, which is beneficial to collect excess kinetic energy, reduce energy waste, and the collected energy can be used for other purposes, thereby saving energy consumption.

[0011] In one possible implementation, the spray arm device further includes a spray arm seat, wherein a mounting cavity is formed within the spray arm seat, and the spray arm shaft is rotatably disposed within the mounting cavity;

[0012] The energy conversion component includes:

[0013] The stator is disposed on the spray arm base and electrically connected to the energy storage component;

[0014] The rotor is disposed on the spray arm shaft and is positioned corresponding to the stator. As the spray arm shaft rotates, the rotor cuts the magnetic field lines generated by the stator to generate current, thereby charging the energy storage device.

[0015] In one possible implementation, when the dishwasher is in the drying phase, the energy storage component releases stored electrical energy, and the energy conversion assembly converts the electrical energy released by the energy storage component into kinetic energy to drive the spray arm to rotate.

[0016] In one possible implementation, the spray arm further includes a spray arm body, one end of which is connected to the spray arm shaft. The spray arm body is provided with a stirring structure, and the energy conversion component drives the spray arm to rotate. The stirring structure is used to accelerate the airflow when the spray arm rotates.

[0017] In one possible implementation, the agitation structure includes blades that protrude from the side of the spray arm body facing away from the spray arm seat and extend along the length of the spray arm body.

[0018] In one possible implementation, the blade has a root connected to the spray arm body and a free end relative to the root, the extension direction of the blade from the root to the free end being the tilt direction of the blade;

[0019] The spray arm body is also provided with spray holes, the orientation of which is the same as the tilt direction of the blades on the corresponding side of the spray arm body, so that when the spray holes spray water, the reaction force of the water flow on the spray arm body and the force of the water flow or air flow on the blades are coordinated, thereby reducing the wind resistance and water flow resistance of the spray arm rotation during washing.

[0020] In one possible implementation, the blade has a root connected to the spray arm body and a free end relative to the root, the extension direction of the blade from the root to the free end being the tilt direction of the blade;

[0021] The main body of the spray arm is also provided with spray holes, the orientation of which is opposite to the tilt direction of the blades on the corresponding sides of the main body of the spray arm, so that the resistance of the blades to the water flow is at least partially converted into the lift of the spray arm, thereby reducing the rotational frictional resistance of the spray arm.

[0022] In one possible implementation, the spray arm rotates in the same direction during the washing phase as it does during the drying phase.

[0023] This application also provides a dishwasher, including the above-described spray arm device.

[0024] In one possible implementation, the dishwasher further includes a current detection unit electrically connected to the energy conversion component of the spray arm assembly to detect the rotation state of the spray arm assembly based on the output current and / or input current of the energy conversion component.

[0025] This application provides a spray arm device and a dishwasher that utilizes electromagnetic principles to convert the kinetic energy of the spray arm during the washing stage into electrical energy and store it in an energy storage device. Then, during the drying stage, the electrical energy stored in the energy storage device is used to drive the spray arm to rotate for air drying, thereby realizing kinetic energy recovery and reuse and effectively reducing the energy consumption of the dishwasher.

[0026] The present application provides a spray arm device and a dishwasher. Since the spray arm is driven by electromagnetic means and not directly connected, it can achieve the effect of simultaneous operation of water drive and electric drive. The dual drive method can improve the reliability of the dishwasher. If one drive method fails, the other drive method can continue to work, ensuring that the basic functions of the dishwasher are not affected.

[0027] This application provides a spray arm device and a dishwasher. By incorporating an energy conversion component and an energy storage component, the energy conversion component converts the kinetic energy of the spray arm into electrical energy during the washing stage and stores it in the energy storage component. This helps to collect excess kinetic energy and reduce energy waste. Furthermore, the energy conversion component can convert the electrical energy back into kinetic energy to drive the spray arm's rotation during the drying stage. This allows the spray arm to rotate during the drying stage, effectively guiding and accelerating airflow within the cavity, achieving blow-drying, significantly shortening drying time, reducing energy consumption, improving the dishwasher's user experience, and aligning with modern energy-saving and environmental protection trends.

[0028] This application provides a spray arm device and a dishwasher, which can realize the spray arm's alternating forward and reverse rotation spray function. The alternating forward and reverse rotation of the spray arm can change the direction of the water flow, generate dynamic water flow, increase the disturbance and impact force of the water flow, thereby improving the efficiency of dirt removal, ensuring that the water flow can reach all corners inside the dishwasher's inner drum, expanding the spray coverage area, improving the uniformity of cleaning, and helping to remove stubborn stains and hard-to-reach areas.

[0029] This application provides a spray arm device and dishwasher, which allows the spray arm to stop at a specific position, facilitating concentrated cleaning of heavily contaminated areas, improving cleaning efficiency, eliminating the need for manual pretreatment or repeated cleaning, reducing water and electricity waste, and enhancing ease of use.

[0030] In addition to the technical problems solved by the embodiments of the present invention, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the spray arm device and dishwasher provided by the embodiments of the present invention, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific embodiments. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a partial three-dimensional structural diagram of a dishwasher provided in an embodiment of the present invention;

[0033] Figure 2 This is a partial three-dimensional structural diagram of the spray arm device provided in an embodiment of the present invention;

[0034] Figure 3 for Figure 2 Enlarged view of the structure at point A;

[0035] Figure 4 A three-dimensional structural diagram of the spray arm of the spray arm device provided in an embodiment of the present invention;

[0036] Figure 5 A partial three-dimensional structural diagram of the spray arm of the spray arm device provided in an embodiment of the present invention;

[0037] Figure 6 This is a control block diagram of a dishwasher provided in an embodiment of the present invention.

[0038] Explanation of reference numerals in the attached figures:

[0039] 10-Spray arm mount;

[0040] 11-Installation cavity;

[0041] 20-Spray arm;

[0042] 21-Spray arm shaft;

[0043] 211 - Sealed cavity;

[0044] 212 - Water supply chamber;

[0045] 22-Spray arm body;

[0046] 221-Spray nozzle;

[0047] 222-blade;

[0048] 2221 - Root;

[0049] 2222-Free End;

[0050] 30 - Energy Conversion Component;

[0051] 31-Stator;

[0052] 32-Rotor;

[0053] 40 - Energy storage components;

[0054] 50 - Current detection unit;

[0055] 60-Inner Liner;

[0056] 61-Receiving cavity;

[0057] 70 - Main control board;

[0058] 80-Alarm. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0060] During the washing cycle, the dishwasher uses spray arms to spray water containing detergent to remove stubborn stains and grease, ensuring the cleanliness and hygiene of the dishes.

[0061] Traditional spray arms rely on the reaction force of water flow to drive their rotation. Through the rotation of the spray arms, the sprayed water can cover most of the interior of the dishwasher. During the drying stage, the dishwasher uses a fan to dry the dishes, ensuring that the dishes are not only clean but also dry after washing, making them easy to use or store. However, this method consumes a significant amount of electricity.

[0062] In view of this, the spray arm device provided in this application embodiment, by setting an energy conversion component and an energy storage component, the energy conversion component can convert the kinetic energy of the spray arm into electrical energy during the washing stage and store it in the energy storage component, which is beneficial to collect excess kinetic energy, reduce energy waste, and the collected energy can be used for other purposes, thereby saving energy consumption.

[0063] Furthermore, traditional spray arms rely on the reaction force of water flow to drive rotation, and can only rotate in one direction, unable to perform targeted spraying or forward / reverse spraying, resulting in limited cleaning effectiveness. This application achieves simultaneous operation of water flow drive and power supply drive, enabling the spray arm to perform targeted spraying and forward / reverse spraying functions. Targeted spraying allows the spray arm to concentrate the water flow in a specific area, ensuring that stubborn stains are thoroughly cleaned, reducing water and electricity waste and improving resource utilization efficiency. Forward / reverse spraying breaks the fixed pattern of water flow, enhances the impact force of the water flow, and more effectively removes dirt, thus adapting to different cleaning needs, significantly improving the cleaning effect of the dishwasher, and providing a better user experience.

[0064] The spray arm device and dishwasher provided in the embodiments of the present invention are described below with reference to the accompanying drawings.

[0065] refer to Figure 1 , Figure 2 and Figure 3 As shown, this application embodiment provides a spray arm device, including: a spray arm 20, an energy conversion component 30, and an energy storage component 40. The spray arm 20 includes a spray arm shaft 21. The energy conversion component 30 is used to convert the kinetic energy of the spray arm 20 into electrical energy when the dishwasher is in the washing stage. The energy storage component 40 is used to store the electrical energy generated by the energy conversion component 30.

[0066] The spray arm device provided in this application embodiment, by setting an energy conversion component 30 and an energy storage component 40, the energy conversion component 30 can convert the kinetic energy of the spray arm 20 into electrical energy when the dishwasher is in the washing stage, which is beneficial to collect excess kinetic energy, reduce energy waste, and the collected energy can be used for other purposes, thereby saving energy consumption.

[0067] In one possible implementation, when the dishwasher is in the drying phase, the energy storage unit 40 releases the stored electrical energy, and the energy conversion component 30 converts the electrical energy released by the energy storage unit 40 into kinetic energy to drive the spray arm 20 to rotate.

[0068] In one possible implementation, the energy conversion component 30 is used to convert the kinetic energy of the spray arm 20 into electrical energy when the dishwasher is in the washing phase, and to convert the electrical energy into kinetic energy to drive the spray arm 20 to rotate when the dishwasher is in the drying phase; the energy storage component 40 is used to store and release the electrical energy generated by the energy conversion component 30.

[0069] This application provides a spray arm device that, by incorporating an energy conversion component 30 and an energy storage component 40, converts the kinetic energy of the spray arm 20 into electrical energy during the washing cycle and stores it in the energy storage component 40, thereby reducing dependence on external power and lowering energy consumption. The energy conversion component 30 can also convert electrical energy into kinetic energy to drive the spray arm 20 during the drying cycle, enabling the spray arm 20 to rotate during the drying cycle. This rotation effectively guides and accelerates airflow within the cavity, achieving air drying and solving the technical problem of high energy consumption during the drying cycle. It significantly shortens drying time, reduces energy consumption, improves the user experience of the dishwasher, and aligns with modern energy-saving and environmental protection trends.

[0070] The spray arm 20 is the main component responsible for spraying water to clean the dishes, and the spray arm shaft 21 is the rotation center of the spray arm 20. The rotational movement of the spray arm 20 allows it to cover multiple corners inside the dishwasher, ensuring thorough cleaning of the dishes.

[0071] This application provides a spray arm device, which also includes a spray arm seat 10. An installation cavity 11 is formed in the spray arm seat 10. The spray arm shaft 21 is rotatably disposed in the installation cavity 11. There is a gap between the spray arm shaft 21 and the inner wall of the installation cavity 11 to ensure that the spray arm 20 remains stable when rotating at high speed, reduce wear, and allow for quick disassembly and installation of the spray arm 20, making it convenient for users to clean and maintain.

[0072] In one possible implementation method, refer to Figure 2 and Figure 3 As shown, the energy conversion component 30 includes a stator 31 and a rotor 32. The stator 31 is disposed on the spray arm base 10 and is electrically connected to the energy storage component 40. The rotor 32 is disposed on the spray arm shaft 21. The rotor 32 is positioned corresponding to the stator 31. As the spray arm shaft 21 rotates, the rotor 32 cuts the magnetic field lines generated by the stator 31 to generate current, which charges the energy storage component 40.

[0073] In one possible implementation, the rotor 32, as the spray arm shaft 21 rotates, cuts the magnetic field lines generated by the stator 31 to generate current. The alternating current is converted into direct current by a rectifier circuit, and after being regulated, it is stored in the energy storage device 40 to charge the energy storage device 40.

[0074] In one possible implementation, the stator 31 includes a stator core and a coil winding wound on the stator core. The stator core may be made of laminated silicon steel sheets and has good magnetic permeability. The stator core has uniformly distributed slots for placing the coil winding. The coil winding may be made of insulated copper wire or aluminum wire.

[0075] In one possible implementation, rotor 32 includes a permanent magnet, or rotor 32 includes a permanent magnet and a closed induction winding, which helps to reduce losses in the process of converting electrical energy into mechanical energy.

[0076] The stator 31 is a fixed part, and the rotor 32 is a rotating part. The rotor 32 is located inside the stator 31. The main function of the stator 31 is to generate a rotating magnetic field. The rotor 32 induces a current under the action of the rotating magnetic field of the stator 31, generating electromagnetic torque, thereby driving the rotor 32 to rotate. The rotor 32 then drives the spray arm shaft 21 to rotate, realizing the rotation of the spray arm 20.

[0077] When the rotor 32 rotates, it cuts the alternating magnetic field lines generated by the stator 31. According to Faraday's law of electromagnetic induction, this will generate an induced electromotive force in the closed winding of the rotor 32. After being processed by the rectifier and voltage regulator circuit, the induced electromotive force can be used to charge the energy storage device 40.

[0078] The rotor 32 and the stator 31 are positioned in a corresponding manner, which means that the rotor 32 and the stator 31 are positioned in the axial direction of the spray arm shaft 21. This ensures that the rotor 32 can effectively cut the magnetic field lines generated by the stator 31, which is beneficial to improving the efficiency of energy conversion.

[0079] In one possible implementation, the energy storage element 40 can be a battery, capacitor, or other form of energy storage device capable of effectively recovering and utilizing energy. The stator 31 is electrically connected to the energy storage element 40 via a wire harness.

[0080] In one possible implementation, the stator 31 is disposed on the inner wall of the mounting cavity 11, the outer circumferential surface of the spray arm shaft 21 has a sealing cavity 211, and the rotor 32 is disposed within the sealing cavity 211. The main function of the sealing cavity 211 is to provide a waterproof environment for the rotor 32, preventing moisture and humidity from entering, which helps protect the rotor 32, prevents the rotor 32 from rusting and corroding due to contact with water, extends the service life of the rotor 32, reduces the frequency of maintenance and replacement, and does not affect the normal magnetic force.

[0081] In one possible implementation, the rotor 32 is formed with the spray arm shaft 21 by a secondary injection molding process, so that the rotor 32 is enclosed in the sealed cavity 211.

[0082] In one possible implementation, the sealing cavity 211 may be formed by a sealing sleeve disposed on the outer peripheral surface of the spray arm shaft 21, the sealing sleeve being made of a corrosion-resistant and waterproof material, such as a rubber sleeve.

[0083] In one possible implementation method, refer to Figure 4 and Figure 5As shown, the spray arm 20 also includes a spray arm body 22, one end of which is connected to the spray arm shaft 21. The spray arm body 22 is provided with a stirring structure. The energy conversion component 30 drives the spray arm 20 to rotate. The stirring structure is used to accelerate the airflow when the spray arm 20 rotates.

[0084] In one possible implementation method, refer to Figure 4 and Figure 5 As shown, the first end of the spray arm body 22 is connected to the spray arm shaft 21, and the second end of the spray arm body 22 extends in a direction away from the spray arm shaft 21. The surface of the spray arm body 22 is provided with spray holes 221, and the spray holes 221 and the agitation structure can be arranged at intervals along the length direction of the spray arm body 22.

[0085] refer to Figure 1 As shown, the dishwasher includes an inner tub 60, within which a receiving cavity 61 is formed. A shelf is provided within the receiving cavity 61, on which dishes are placed. A spray arm mount 10 is located at the bottom center of the inner tub 60, and the spray arm 20 rotates within a mounting cavity 11 formed within the spray arm mount 10. (Reference) Figure 1 and Figure 4 As shown, the spray arm shaft 21 is connected to a snap-fit ​​structure 23, which is used to assemble with the spray arm seat 10 to ensure that the spray arm will not loosen during operation, making the installation and disassembly of the spray arm simple and quick without the need for tools.

[0086] The main function of the agitation structure is to disturb and accelerate the airflow when the spray arm 20 rotates. This accelerates the air circulation inside the receiving cavity 61, and the rapidly flowing air helps with moisture evaporation, shortening the drying time and thus drying the dishes with a blowing airflow, improving drying efficiency. The agitation structure also helps to evenly distribute the airflow to all corners of the dishwasher, ensuring that all dishes dry quickly.

[0087] In one possible implementation method, refer to Figure 3 , Figure 4 and Figure 5 As shown, the spray arm 20 includes two or more spray arm bodies 22, which are arranged at intervals around the spray arm shaft 21.

[0088] A water supply chamber 212 is formed inside the spray arm shaft 21, and a cavity is formed inside the spray arm body 22. The cavity is connected to the water supply chamber 212, and a water supply pipe extends into the water supply chamber 212. The water supplied by the water supply pipe enters the cavity from the water supply chamber 212 and is sprayed out from the spray holes 221 opened on the surface of the spray arm body 22 to achieve a cleaning effect.

[0089] In one possible implementation, the number of spray holes 221 opened on the surface of each spray arm body 22 can be multiple, and the multiple spray holes 221 can be oriented in different directions. The spray holes 221 are used to spray washing water to ensure that the water can cover all corners inside the dishwasher's inner drum 60, achieving an all-round cleaning effect.

[0090] In one possible implementation, the pitch angle of some nozzles 221 can be 30° to 60°, expanding the spray coverage area. Each spray arm body 22 has no specific drive hole; instead, the individual angled nozzles 221 provide a reaction force to the water flow, enabling the water flow to drive the spray arm 20 to rotate.

[0091] In one possible implementation method, refer to Figure 4 and Figure 5 As shown, the agitation structure includes blades 222, which protrude from the side of the spray arm body 22 facing away from the spray arm seat 10 and extend along the length of the spray arm body 22. When the spray arm 20 rotates, the spray arm body 22 drives the blades 222 to rotate. The rotating blades 222 push the surrounding air, forming a low-pressure zone around the blades 222. The air naturally flows to the low-pressure zone, thereby accelerating the airflow, assisting the drying process, reducing drying time, and improving drying efficiency.

[0092] In one possible implementation, the blades 222 and the nozzles 221 are arranged at intervals along the length of the spray arm body 22. This arrangement ensures that the blades 222 and the nozzles 221 do not interfere with each other's functions.

[0093] refer to Figure 4 and Figure 5 As shown, the blade 222 has a root 2221 connected to the spray arm body 22 and a free end 2222 relative to the root 2221. The extension direction of the blade 222 from the root 2221 to the free end 2222 is the tilting direction of the blade 222.

[0094] In one possible implementation, the spray arm body 22 is also provided with a spray hole 221, the orientation of which is the same as the tilt direction of the blade 222 on the same side of the corresponding spray arm body 22, so that when the spray hole 221 sprays water, the reaction force of the water flow on the spray arm body 22 and the force of the water flow or air flow on the blade 222 are coordinated with each other, so as to reduce the wind resistance and water flow resistance of the spray arm 20 during washing.

[0095] The orientation of the nozzle 221 and the tilt direction of the blade 222 are both towards the same side of the corresponding spray arm body 22. This means that the water jet direction of the nozzle 221 and the tilt direction of the blade 222 are aligned with the tilt direction of the spray arm body 22. For example, if the blade 222 is tilted 30° clockwise, the water jet direction of the nozzle 221 will also be tilted 30° or 45° clockwise.

[0096] With this configuration, during the washing phase, the rotation direction of the spray arm 20 is opposite to the orientation of the spray nozzles 221. When the spray nozzles 221 spray washing water, the water flow generates a reaction force on the spray arm body 22. This reaction force drives the spray arm 20 to rotate, increasing its rotational speed and initial acceleration. This structure is designed to fully utilize the reaction force of the water flow on the spray arm body 22 when the spray nozzles 221 spray water, converting this reaction force into power to drive the spray arm 20 to rotate. The faster the water jet speed and the more spray nozzles 221 there are, the greater the driving torque and the faster the spray arm 20 rotates.

[0097] Furthermore, the orientation of the nozzle 221 and the tilt direction of the blade 222 are both directed toward the same side of the corresponding spray arm body 22. That is, the orientation of the nozzle 221 and the tilt direction of the blade 222 are matched in the same direction. When the spray arm 20 rotates, the tilt direction of the blade 222 is coordinated with the movement direction of the water flow and air flow. The upper surface of the blade 222 becomes the windward surface, avoiding the blade 222 from having a direct impact with the fluid. This significantly reduces the wind resistance and water flow resistance experienced by the blade 222, which not only improves the rotation efficiency of the spray arm 20, but also reduces energy loss and improves the rotational stability of the spray arm 20 and the water flow energy utilization rate.

[0098] In one possible implementation, the spray arm body 22 is also provided with spray holes 221, the orientation of which is the same as the tilt direction of the blades 222, and the rotation direction of the spray arm 20 during the washing stage is the same as the rotation direction during the drying stage.

[0099] During the washing stage, the rotation direction of the spray arm 20 is opposite to that of the spray hole 221. When the washing water flows out through the spray hole 221, it will form a reverse fluid force on the spray arm body 22. This reaction force can drive the spray arm 20 to rotate, and at the same time, it can significantly increase the initial acceleration of the spray arm 20 and increase the overall rotation speed of the spray arm 20.

[0100] During the drying stage, the rotation direction of the spray arm 20 is the same as that during the washing stage. This ensures that the tilt direction of the blades 222 and the movement trajectory of the airflow work in tandem during the drying stage. This avoids direct collision between the blades 222 and the airflow, significantly reducing the wind resistance experienced by the blades 222. This not only improves the rotational transmission efficiency of the spray arm 20 and reduces the ineffective loss of driving energy, but also enhances the stability of the spray arm's rotational speed.

[0101] In one possible implementation, the spray arm body 22 is further provided with a spray hole 221, the orientation of which is opposite to the tilt direction of the blade 222, so that the resistance of the blade 222 to water flow and air flow is at least partially converted into the lift of the spray arm 20, thereby reducing the rotational frictional resistance of the spray arm 20.

[0102] The spray arm body 22 is also provided with spray holes 221. The orientation of the spray holes 221 and the tilt direction of the blades 222 are respectively opposite to the corresponding sides of the spray arm body 22. That is, with the geometric center of the spray arm body 22 as a reference, a vertical plane extending in the vertical direction is drawn. This vertical plane can symmetrically divide the radial structure of the spray arm body 22 into two parts, and the orientation of the spray holes 221 and the tilt direction of the blades 222 are respectively opposite to the sides of this vertical plane. For example, the blades 222 are tilted at 45° relative to the horizontal plane of the spray arm body 22, and the water outlet direction of the spray holes 221 is tilted at an angle of 135° or 150° relative to the horizontal plane.

[0103] With this configuration, the orientation of the nozzle 221 and the tilt direction of the blade 222 are respectively oriented to the opposite side of the corresponding spray arm body 22. During the washing stage, when the nozzle 221 sprays water, the water or airflow acts on the lower surface of the blade 222, and the lower surface of the blade 222 becomes the windward surface. The impact resistance generated by the water or airflow on the blade 222 forms a lift component along the axial direction of the spray arm 20. This lift can effectively offset at least part of the weight of the spray arm 20, making the spray arm 20 close to or in a suspended state. This helps to reduce the contact friction area of ​​the spray arm 20, thereby significantly reducing the mechanical friction resistance during the rotation of the spray arm 20, and achieving smooth, low-energy rotation of the spray arm 20.

[0104] In this scheme, part of the resistance experienced by the blade 222 during the rotation of the spray arm 20 is converted into lift to assist the movement of the spray arm 20, so that the water flow can both meet the spray cleaning requirements and actively cancel the frictional resistance, thereby improving the overall energy utilization efficiency and avoiding resource waste.

[0105] In one possible implementation, the orientation of the nozzle 221 and the tilt direction of the blade 222 are respectively directed to the opposite side of the corresponding spray arm body 22, and the rotation direction of the spray arm 20 during the washing stage is opposite to the rotation direction during the drying stage.

[0106] During the washing stage, when the spray arm 20 rotates and the spray nozzles 221 spray water, the lower surface of the blades 222 becomes the windward surface. The impact resistance generated by the water flow on the blades 222 forms a lift component along the axial direction of the spray arm 20. This lift can effectively offset at least part of the weight of the spray arm 20, making the spray arm 20 close to or in a suspended state. This helps to reduce the contact friction area, thereby significantly reducing the mechanical friction resistance during the rotation of the spray arm 20 and ensuring that the spray arm 20 can achieve smooth and stable rotation with lower energy consumption.

[0107] During the drying stage, when the spray arm 20 rotates, the upper surface of the blades 222 becomes the windward surface. The upper surface of the blades 222 actively guides the surrounding air. Due to the upward tilt angle of the blades 222, the air below is quickly lifted and diffused in all directions, which accelerates the air circulation speed in the drying area and improves the drying effect.

[0108] In another possible implementation, not shown in the figure, the agitation structure includes a fan blade surface, which is the side of the spray arm body 22 facing away from the spray arm seat 10. The fan blade surface is inclined or twisted. Because the fan blade surface is inclined or twisted, when the spray arm 20 rotates, the fan blade surface pushes the surrounding air, causing the air to flow along the inclined or twisted direction of the fan blade surface, thereby guiding and accelerating the airflow, similar to the working principle of a fan blade.

[0109] In one possible implementation, from one end of the spray arm body 22 connected to the spray arm shaft 21 to the end of the spray arm body 22 away from the spray arm shaft 21, the side of the spray arm body 22 facing away from the spray arm seat 10 is gradually twisted, and the twisting direction is the same as or opposite to the rotation direction of the spray arm body 22.

[0110] In one possible implementation, the side of the spray arm body 22 facing away from the spray arm base 10 is tilted in the same or opposite direction as the rotation direction of the spray arm body 22.

[0111] In one possible implementation, the energy conversion component 30 has a first driving state in which the energy conversion component 30 drives the spray arm 20 to rotate in the opposite direction to the rotation direction of the water flow-driven spray arm 20, but at the same speed, so as to stop the spray arm 20 from rotating.

[0112] In existing dishwashers, the spray arm 20 is driven solely by water flow. However, the spray arm 20 cannot remain stationary at specific positions, making it difficult to effectively clean heavily soiled areas. This results in stubborn stains being difficult to remove, potentially requiring repeated cleaning and increasing water and electricity consumption. In this embodiment, the first driving state involves the energy conversion component 30 driving the spray arm 20 in the opposite direction to the water flow-driven rotation, while maintaining the same rotation speed. By allowing both methods to coexist, the spray arm 20 can be stopped, facilitating focused cleaning of heavily soiled areas, improving cleaning efficiency, eliminating the need for manual pre-treatment or repeated cleaning, reducing water and electricity waste, and enhancing ease of use.

[0113] In one possible implementation, the energy conversion component 30 has a second driving state in which the rotation direction of the spray arm 20 driven by the energy conversion component 30 is opposite to the rotation direction of the water flow-driven spray arm 20, and the rotation speed of the spray arm 20 driven by the energy conversion component 30 is greater than the rotation speed of the water flow-driven spray arm 20, so as to change the rotation direction of the spray arm 20.

[0114] In this embodiment, by adding a second driving state, the spray arm 20 can alternate between forward and reverse rotation. The alternation of forward and reverse rotation of the spray arm 20 can change the direction of the water flow, generate dynamic water flow, increase the disturbance and impact force of the water flow, thereby improving the efficiency of dirt removal, ensuring that the water flow can reach all corners inside the inner drum 60 of the dishwasher, expanding the spray coverage area, improving the uniformity of cleaning, and helping to remove stubborn stains and hard-to-reach areas.

[0115] This application also provides a dishwasher, including the spray arm device described above.

[0116] In one possible implementation method, refer to Figure 6 As shown, the dishwasher also includes a current detection unit 50, which is electrically connected to the energy conversion component 30 to detect the rotation state of the spray arm 20 of the spray arm device based on the output current and / or input current of the energy conversion component 30.

[0117] The dishwasher also includes a main control board 70 and an alarm 80. The current detection unit 50 is electrically connected to the main control board 70, and the alarm 80 is also electrically connected to the main control board 70. The main control board 70 adjusts the magnetic field strength and direction of the stator 31 to achieve different rotation states of the spray arm.

[0118] The current detection unit 50 is electrically connected to the rotor 32 of the energy conversion assembly 30. The rotor 32, mounted on the spray arm shaft 21, rotates with the spray arm shaft 21, cutting magnetic lines of force to generate current. The current detection unit 50 can monitor the rotation state of the spray arm 20 based on this current signal. Alternatively, the current detection unit 50 can also detect rectified and regulated DC current, resulting in a more stable current signal.

[0119] The spray arm 20 has two rotation states: normal rotation and jammed state. When the spray arm 20 is in the normal rotation state, the load on the energy conversion component 30 is stable, so the current consumption is relatively stable. When the spray arm 20 is in the jammed state, for example, when the spray arm 20 is blocked by a foreign object, the energy conversion component 30 needs to overcome additional resistance to try to continue rotating. This usually leads to an increase in the load on the energy conversion component 30, requiring more current to maintain its output torque. This will cause the current detection unit 50 to detect an abnormal increase in current.

[0120] When the energy conversion component 30 drives the spray arm 20 to rotate, the load change of the spray arm 20 directly causes regular fluctuations in the current. The magnitude of the additional current is proportional to the load torque of the spray arm 20. The greater the load on the spray arm 20, the greater the torque that the energy conversion component 30 needs to output. This requires a larger current in the stator 31 coil windings to generate a stronger electromagnetic force to balance the load resistance. Therefore, the rotational state of the spray arm 20 can be detected by detecting the input current of the energy conversion component 30. For example, the input current of the energy conversion component 30 can be detected using a current-sensing resistor sampling method.

[0121] The greater the load torque of the spray arm 20, the greater the electromagnetic torque required from the energy conversion component 30, and the rotor current will inevitably increase accordingly. Therefore, the rotation state of the spray arm 20 of the spray arm device can be detected by detecting the output current of the energy conversion component 30.

[0122] During the washing stage: When the current detection unit 50 detects a current significantly higher than the current during normal operation of the spray arm 20, it determines that the spray arm 20 is stuck. The current detection unit 50 transmits the current signal to the main control board 70, which then controls the alarm 80 to sound an alarm. No additional sensors are needed to detect the rotation status of the spray arm 20, resulting in lower costs. During the drying stage, the spray arm 20 typically does not experience a stuck state. Therefore, during the drying stage, the current detection unit 50 does not need to monitor the rotation status of the spray arm 20 based on the current signal.

[0123] In one possible implementation, the alarm 80 includes a warning light, a buzzer, a horn, etc., to promptly report the abnormality to the user when the spray arm 20 stalls.

[0124] In one possible implementation, the current detection unit 50 includes a current detection circuit. For example, the current is calculated by measuring the voltage drop across a small resistor with a known resistance connected in series in the circuit connecting the energy storage element 40 and the rotor 32.

[0125] The dishwasher provided in this application embodiment also includes a water pump and a drain assembly. The water pump is used to pump water into the water supply pipe, and the drain assembly is used to drain the water after washing.

[0126] When the dishwasher is in the washing phase, refer to Figure 2 , Figure 3 Figure 4 and Figure 6 As shown, water is sprayed out from the nozzle 221 of the spray arm 20. Due to the reaction of the water flow, the spray arm 20 rotates. At this time, the rotor 32 set on the spray arm shaft 21 rotates with the spray arm shaft 21. The rotor 32 cuts the magnetic field lines generated by the stator 31 to generate an induced current. After rectification and voltage regulation, the AC power is converted into DC power and stored in the energy storage device 40.

[0127] When the dishwasher is in the drying stage, the main control board 70 controls the energy storage component 40, which supplies power to the stator 31 and drives the stator 31 to generate a changing magnetic field. Under the action of the changing magnetic field, the rotor 32 drives the entire spray arm 20 to rotate. The stirring structure on the spray arm 20 generates wind to dry the tableware without the need for additional power supply.

[0128] Depending on the application scenario, the spray arm 20 can achieve different rotation states through different configurations of the control program. When targeted spraying is required in a localized area, the energy storage device 40 supplies power to the stator 31, driving the stator 31 to generate a changing magnetic field. Under the influence of this changing magnetic field, the rotor 32 drives the entire spray arm 20 to rotate. Since the direction of rotation of the entire spray arm 20 driven by the rotor 32 is opposite to the direction of rotation of the spray arm 20 under the action of water flow, and the magnitude of the rotational force remains the same, the spray arm 20 stops rotating, achieving targeted spraying in a specific area.

[0129] The main control board 70 controls the energy storage component 40 to adjust the output voltage, which can increase the magnetic force output by the stator 31, so that the magnetic force is greater than the driving force of the water flow. At this time, the spray arm 20 will rotate in the opposite direction to the rotation of the spray arm 20 driven by the water flow, thereby realizing the forward and reverse spraying of the spray arm and improving the cleaning effect of the tableware.

[0130] The spray arm device and dishwasher provided in this application embodiment can convert electrical energy into kinetic energy to drive the spray arm to rotate during the drying stage, realizing the recovery and reuse of the spray arm's kinetic energy. Driving the spray arm to rotate during the drying stage can effectively guide and accelerate the airflow movement in the cavity, significantly shorten the drying time, and reduce power consumption.

[0131] The present application provides a spray arm device and dishwasher that utilize electromagnetic principles to convert the kinetic energy of the spray arm 20 during the washing stage into electrical energy and store it in the energy storage device 40. Then, during the drying stage, the electrical energy stored in the energy storage device 40 is used to drive the spray arm 20 to rotate for air drying, thereby realizing kinetic energy recovery and reuse and effectively reducing the energy consumption of the dishwasher.

[0132] The present application provides a spray arm device and a dishwasher. Since the spray arm 20 is driven by electromagnetic force and not directly connected, it can achieve the effect of simultaneous operation of water drive and electric drive. The dual drive mode can improve the reliability of the dishwasher. If one drive mode fails, the other drive mode can continue to work, ensuring that the basic functions of the dishwasher are not affected.

[0133] In the description of this invention, it should be understood that the terms "center," "length," "width," "thickness," "top," "bottom," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," "outer," "axial," and "circumferential," etc., used to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the indicated position or component must have a specific orientation, or a specific structure and operation, and therefore should not be construed as a limitation of this invention.

[0134] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0135] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0136] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0137] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A spray arm device, characterized in that, The application relates to a dish washing machine, which comprises the following components: a spray arm (20) comprising a spray arm shaft (21); an energy conversion assembly (30) for converting kinetic energy of the spray arm (20) into electric energy when the dish washing machine is in a washing stage; an energy storage component (40) for storing the electric energy generated by the energy conversion assembly (30).

2. The spray arm device of claim 1, wherein The spray arm device further comprises a spray arm base (10) in which a mounting cavity (11) is formed, and the spray arm shaft (21) is rotatably arranged in the mounting cavity (11). The energy conversion assembly (30) comprises: a stator (31) arranged in the spray arm base (10) and electrically connected with the energy storage component (40); a rotor (32) arranged in the spray arm shaft (21), which corresponds to the position of the stator (31), and generates an electric current by cutting the magnetic induction lines generated by the stator (31) when the spray arm shaft (21) rotates, thereby charging the energy storage component (40).

3. The spray arm device of claim 2, wherein, When the dish washing machine is in a drying stage, the energy storage component (40) releases the stored electric energy, and the energy conversion assembly (30) converts the electric energy released by the energy storage component (40) into kinetic energy for driving the rotation of the spray arm (20).

4. The spray arm device of claim 3, wherein The spray arm (20) further comprises a spray arm body (22) connected to the spray arm shaft (21) at one end, and the spray arm body (22) is provided with an agitating structure, the energy conversion assembly (30) drives the rotation of the spray arm (20), and the agitating structure is used for accelerating airflow when the spray arm (20) rotates.

5. The spray arm device of claim 4, wherein The agitating structure comprises a blade (222) protruding from a side of the spray arm body (22) away from the spray arm base (10), and the blade (222) extends along the length direction of the spray arm body (22).

6. The spray arm device of claim 5, wherein The blade (222) has a root (2221) connected to the spray arm body (22) and a free end (2222) opposite to the root (2221), and the extension direction of the blade (222) from the root (2221) to the free end (2222) is the inclination direction of the blade (222). The spray arm body (22) is further provided with a spray hole (221), and the spray hole (221) is arranged on the same side of the spray arm body (22) as the inclination direction of the blade (222), so that when the spray hole (221) sprays water flow, the reaction force of the water flow on the spray arm body (22) is consistent with the direction of the force of the water flow or the airflow on the blade (222), thereby reducing the wind resistance and water flow resistance of the spray arm (20) during washing.

7. The spray arm device of claim 5, wherein The blade (222) has a root (2221) connected to the spray arm body (22), and a free end (2222) opposite to the root (2221), and the extending direction of the blade (222) from the root (2221) to the free end (2222) is the tilting direction of the blade (222); The spray arm body (22) is further provided with a spray hole (221), and the directions of the spray hole (221) and the tilting direction of the blade (222) are respectively towards the opposite sides of the corresponding spray arm body (22), so that the resistance of the water flow on the blade (222) is at least partially converted into the lifting force of the spray arm (20), thereby reducing the rotating frictional resistance of the spray arm (20).

8. The spray arm device of claim 6, wherein, The rotating direction of the spray arm (20) in the washing stage is the same as the rotating direction in the drying stage.

9. A dishwasher, characterized in that The spray arm device comprises the spray arm (20) and the energy conversion assembly (30). 10.The dish washer of claim 9, wherein The dishwasher further comprises a current detection unit (50) electrically connected to the energy conversion assembly (30) of the spray arm device, so as to detect the rotating state of the spray arm (20) of the spray arm device according to the output current of the energy conversion assembly (30) and / or the input current of the energy conversion assembly (30).

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