A noise reduction structure, kitchen appliance using the same and noise reduction control method

Abstract

The present invention discloses a noise reduction structure, a kitchen appliance using the same, and a noise reduction control method, wherein the noise reduction structure includes a sound chamber, a sound-permeable component, a rectifier component, and a magnetic noise reduction component; the sound-permeable component covers the surface of the sound chamber, and the two form a cavity, the rectifier component is arranged in the cavity for gathering and reflecting the sound entering through the sound-permeable component, the magnetic noise reduction component is arranged in the rectifier component, and there is a gap between the two, and the magnetic noise reduction component vibrates under the action of sound waves and electromagnetic forces to generate friction for noise reduction. When the present invention is implemented, the sound can enter the cavity from the sound-permeable component, the rectifier component gathers and reflects the sound, and when it reaches the inner wall of the sound chamber, it is emitted again into the rectifier component, and at the same time, the magnetic noise reduction component moves back and forth in the rectifier component under the action of the sound wave pressure and the electromagnetic force, generates friction, and performs noise reduction, thereby reducing the noise of the sound entering the cavity, and the noise reduction effect is good.

Description

Technical Field

[0001] The present invention belongs to the technical field of noise reduction devices, and in particular relates to a noise reduction structure, a kitchen appliance using the same, and a noise reduction control method. Background Art

[0002] Kitchen appliances are household appliances designed for use in the kitchen. They can be divided into five categories according to their uses: food preparation, preparation, cooking, storage and kitchen hygiene. For example, they include refrigerators, disinfection cabinets, range hoods, gas water heaters and other appliances. Among them, gas water heaters are highly recognized by consumers for their energy-saving and environmentally friendly advantages, but gas water heaters will emit at least 55 decibels of noise when working; and range hoods, with the current market prospects of large air volume and large suction, will generate more and more noise as the air volume gradually increases; when users use the above-mentioned kitchen appliances, they will be in a noisy environment for a long time, which will cause adverse reactions such as irritability, heartache, palpitations, and even have a serious impact on their physical and mental health.

[0003] Moreover, as people's quality of life improves, their requirements for the use of kitchen appliances are gradually increasing. When purchasing kitchen appliances, users are paying more and more attention to the size of noise parameters. Therefore, noise has become a technical problem that needs to be solved urgently in existing kitchen appliances. It is very necessary to design a noise reduction structure that is suitable for kitchen appliances and can effectively reduce the noise generated by the kitchen appliances when they are working. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a noise reduction structure, which realizes noise reduction through the cooperation of a sound chamber, a sound-transmitting component, a rectification component and a magnetic noise reduction component.

[0005] The invention also discloses a kitchen appliance.

[0006] The invention also discloses a noise reduction control method.

[0007] The technical solution adopted by the present invention is:

[0008] A noise reduction structure includes a sound chamber, a sound-transmitting component, a rectification component and a magnetic noise reduction component; the sound-transmitting component covers the surface of the sound chamber, and the two together constitute a cavity, the rectification component is arranged in the cavity to gather and reflect the sound entering through the sound-transmitting component, the magnetic noise reduction component is arranged in the rectification component with a gap therebetween, and the magnetic noise reduction component vibrates under the action of sound waves and electromagnetic force to generate friction for noise reduction.

[0009] Preferably, the noise reduction structure further comprises a viscous fluid, and the viscous fluid is filled in the cavity; when the magnetic noise reduction component vibrates, viscous friction is generated between the viscous fluid and the inner wall of the rectification component to reduce noise.

[0010] Preferably, the magnetic noise reduction component includes a hollow cylinder, a magnetic film and an electromagnetic induction coil, wherein the magnetic film covers the outer surface of the cylinder, and the electromagnetic induction coil is arranged on the inner surface of the sound chamber and acts with the magnetic film to drive the cylinder to vibrate.

[0011] Preferably, the outer surface of the cylinder is provided with a plurality of first protrusions for increasing viscous friction.

[0012] Preferably, the rectification component comprises a sound inlet, a sound channel and a sound outlet which are connected in sequence, the sound-transparent component is connected to the sound inlet, the sound inlet and the sound outlet are both trumpet-shaped structures, the sound channel is a tubular structure, and is respectively connected to the minimum diameters of the sound inlet and the sound outlet.

[0013] Preferably, the inner surface of the sound channel is provided with a plurality of second protrusions for increasing the viscous friction force.

[0014] Preferably, the first protrusion and the second protrusion are dots or spikes.

[0015] Preferably, it also includes a skeleton arranged in the sound chamber and connected to the sound-transmitting component, and the skeleton is used to evenly divide the sound chamber into a plurality of small chambers; the rectification component and the magnetic noise reduction component are both multiple and correspond one-to-one to the multiple small chambers.

[0016] Preferably, the viscous fluid is lubricating oil, engine oil or water with thickener added.

[0017] A kitchen appliance comprises the above-mentioned noise reduction structure, wherein the noise reduction structure is arranged in the kitchen appliance.

[0018] A noise reduction control method is used to reduce the noise of the above-mentioned kitchen appliance, and specifically comprises the following steps:

[0019] S1, obtain the working power of kitchen appliances;

[0020] S2, when the operating power is greater than or equal to the power threshold, the magnetic noise reduction component is turned on.

[0021] Preferably, the opening of the magnetic noise reduction component is specifically:

[0022] S21, determining the frequency range of the current noise according to the working power of the kitchen appliance; wherein the kitchen appliance is preset with a corresponding relationship between the working power and the frequency range;

[0023] S22, applying current to the electromagnetic induction coil (43) of the magnetic noise reduction component (4), so that it drives the magnetic film (42) of the magnetic noise reduction component (4) to vibrate, and making the frequency of the vibration of the magnetic film (42) within the frequency range of the current noise; wherein the kitchen appliance has a preset correspondence between the current value of the current and the frequency of the vibration of the magnetic film (42).

[0024] Compared with the prior art, the present invention forms a cavity structure through a sound chamber and a sound-transmitting component, and arranges a rectifier component and a magnetic noise reduction component in the cavity. Sound can enter the cavity from the sound-transmitting component, and the rectifier component gathers and reflects the sound, and emits it again into the rectifier component when it reaches the inner wall of the sound chamber. At the same time, the magnetic noise reduction component moves back and forth in the rectifier component under the action of sound wave pressure and electromagnetic force, generating friction to reduce noise, thereby reducing the noise of the sound entering the cavity, and the noise reduction effect is good; and the present invention can significantly reduce the noise generated by the operation of kitchen appliances such as dishwashers, gas water heaters, and range hoods by arranging the above-mentioned noise reduction structure on kitchen appliances such as dishwashers, gas water heaters, and range hoods, thereby effectively improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a structural schematic diagram of a noise reduction structure provided by Embodiment 1 of the present invention;

[0026] Figure 2 is a schematic diagram of the internal structure of a noise reduction structure provided by Embodiment 1 of the present invention;

[0027] Figure 3 A diagram showing the coordination of a rectifier component and a magnetic noise reduction component in a noise reduction structure provided by Embodiment 1 of the present invention;

[0028] Figure 4 is a schematic structural diagram of a magnetic noise reduction component in a noise reduction structure provided by Embodiment 1 of the present invention;

[0029] Figure 5 is a block diagram of a magnetic noise reduction component in a noise reduction structure provided by Embodiment 1 of the present invention;

[0030] Figure 6 is a schematic structural diagram of a rectifier component in a noise reduction component provided by Embodiment 1 of the present invention;

[0031] Figure 7 is a structural schematic diagram of a kitchen appliance provided by Embodiment 2 of the present invention;

[0032] Figure 8 This is a flowchart of a noise reduction control method provided in Example 3 of the present invention.

[0033] Among them, 1. sound chamber, 2. sound-transmitting component, 3. rectification component, 4. magnetic noise reduction component, 5. noise reduction structure, 11. frame, 31. sound inlet, 32. sound channel, 33. sound outlet, 34. second protrusion, 41. cylinder, 42. magnetic film, 43. electromagnetic induction coil, 44. first protrusion, 111. fixed bracket. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] In the description of the present invention, it should be clarified that terms such as "vertical", "lateral", "longitudinal", "front", "rear", "left", "right", "up", "down", and "horizontal" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are merely for the convenience of describing the present invention. They do not mean that the devices or elements referred to must have a specific direction or position, and therefore cannot be understood as limitations on the invention.

[0036] 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; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Example 1

[0038] Embodiment 1 of the present invention provides a noise reduction structure, such as Figure 1-3 As shown, it includes a sound chamber 1, a sound-transmitting component 2, a rectification component 3 and a magnetic noise reduction component 4; the sound-transmitting component 2 covers the surface of the sound chamber 1, and the two together form a cavity, the rectification component 3 is arranged in the cavity to gather and reflect the sound entering through the sound-transmitting component 2, the magnetic noise reduction component 4 is arranged in the rectification component 3 with a gap therebetween, and the magnetic noise reduction component 4 vibrates under the action of sound waves and electromagnetic force to generate friction for noise reduction;

[0039] Specifically, the sound chamber 1 is a cavity-type structure with one end open, and the sound-permeable component 2 covers the open end of the sound chamber 1. The sound chamber 1 and the sound-permeable component 2 are combined to form a cavity structure, so that sound can enter the sound chamber 1 from the sound-permeable component 2;

[0040] In this way, using the above structure, sound enters from the sound-permeable component 2, the rectifier component 3 gathers the sound, enhances the sound intensity, and reflects it, and then the sound reaches the inner wall of the sound chamber 1, and is reflected by the inner wall of the sound chamber 1 and reaches the rectifier component 3 again. In addition, during the sound transmission process, the magnetic noise reduction component 4 moves in the rectifier component 3 under the action of the sound wave pressure and its own magnetic force, and friction is generated between the rectifier component 3 and the inner wall of the rectifier component 3 during the movement, thereby reducing noise through the effect of friction.

[0041] In a specific implementation, the sound-permeable component 2 may be a sound-permeable film or a sound-permeable sheet, which is mainly used to allow sound to penetrate into the sound chamber 1 .

[0042] The noise reduction structure further includes a viscous fluid (not shown in the figure), which is filled in the cavity; when the magnetic noise reduction component 4 vibrates, viscous friction is generated between the viscous fluid and the inner wall of the rectifier component 3 to reduce noise;

[0043] Specifically, the viscous fluid is lubricating oil, engine oil or water with a thickener added; and, since there is a gap between the magnetic noise reduction component 4 and the rectifier component 3, the viscous fluid will fill the gap. In this way, when the magnetic noise reduction component 4 moves in the rectifier component 3 under the action of the sound wave pressure and its own magnetic force, the viscous fluid itself will also generate friction with the rectifier component 3 and the magnetic noise reduction component 4, further improving the noise reduction effect.

[0044] like Figure 4-5 As shown, the magnetic noise reduction component 4 includes a hollow cylinder 41, a magnetic film 42 and an electromagnetic induction coil 43. The magnetic film 42 covers the outer surface of the cylinder 41. The electromagnetic induction coil 43 is arranged on the inner surface of the sound chamber 1 and acts with the magnetic film 42 to drive the cylinder 41 to vibrate.

[0045] In this way, by applying current to the electromagnetic induction coil 43, it drives the magnetic film 42 to vibrate, and the magnetic film 42 drives the cylinder 41 to vibrate, further increasing the friction force and improving the noise reduction effect.

[0046] Specifically, the cylinder 41 is made of lightweight plastic, so that it can be pushed under the action of sound wave pressure and electromagnetic force due to its light weight. However, its material is not limited to lightweight plastic material, and other materials with low density suitable for the present invention can be used in this embodiment.

[0047] like Figure 6As shown, the rectifier component 3 includes a sound inlet 31, a sound channel 32 and a sound outlet 33 which are connected in sequence, the sound-permeable component 2 is connected to the sound inlet 31, the sound inlet 31 and the sound outlet 33 are both trumpet-shaped structures, and the sound channel 32 is a tubular structure and is connected to the minimum diameter of the sound inlet 31 and the sound outlet 33 respectively;

[0048] Specifically, the rectifier assembly 3 includes a sound inlet 31 and a sound outlet 33 of a trumpet-shaped structure, and a tubular structure arranged between the sound inlet 31 and the sound outlet 33, that is, a sound channel 32 of a cylindrical structure, that is, the trumpet-shaped closing part of the sound inlet 31 and the sound outlet 33 is connected to the sound channel 42;

[0049] In this way, the sound enters the cavity from the sound-permeable component 2, and then the sound inlet 31 gathers the sound, enhances the sound intensity, reflects, makes the sound enter the sound channel 32, and pushes the magnetic noise reduction component 4 to move, and then the sound propagates to the sound outlet 33, reaches the inner wall of the sound chamber 1, and is reflected back to the sound outlet 33, gathered, and then reflected into the sound channel 32, and pushes the magnetic noise reduction component 4 to move again. During the movement, the magnetic noise reduction component 4 generates viscous friction with the viscous fluid, thereby reducing noise.

[0050] In addition, the inner surface of the sound channel 32 is provided with a plurality of second protrusions 34 for increasing the viscous friction force; the surface of the cylinder 41 is provided with a plurality of first protrusions 44 for increasing the friction;

[0051] In a specific embodiment, the first protrusion 44 and the second protrusion 34 are dots or spikes, but may also be protrusions of other irregular shapes.

[0052] It also includes a frame 11 disposed in the sound chamber 1 and connected to the sound-permeable component 2, the frame 11 is used to evenly divide the sound chamber 1 into a plurality of small chambers; the rectifier component 3 and the magnetic noise reduction component 4 are both multiple, and correspond one to one with the multiple small chambers;

[0053] Specifically, the frame 11 is arranged in the sound chamber 1, and the sound chamber 1 is divided into a plurality of small chambers which are not connected to each other, each of which is filled with a viscous solution, and each of which is provided with a rectifying component 3 and a magnetic noise reduction component 4;

[0054] In this way, the sound chamber 1 is divided into a plurality of small sound chambers, and a rectifier component 3 and a magnetic noise reduction component 4 are correspondingly arranged in each small chamber, so that the sound can be diverted. By performing noise reduction processing on the sound through the plurality of rectifier components 3 and the magnetic noise reduction components 4, the generated noise can be significantly reduced, and the noise reduction effect can be improved;

[0055] Furthermore, in order to fix the rectifier assembly 3 in the small chamber, a fixing bracket 111 for fixing the rectifier assembly 3 is further provided on the frame 11 , and the fixing bracket 111 is connected to the sound channel 32 .

[0056] Working process: When the noise reduction structure of this embodiment is in use, the sound enters the sound chamber 1, that is, enters the cavity, from the sound-permeable component 2, and then the sound inlet 31 in the rectifier component 3 gathers and reflects the sound entering the cavity, and the sound enters the sound channel 32, and pushes the magnetic noise reduction component 4 to move. At the same time, by applying current to the electromagnetic induction coil 43, it drives the magnetic film 42 to vibrate, and the magnetic film 42 drives the cylinder 41 to vibrate; then the sound propagates to the sound outlet 33, reaches the inner wall of the sound chamber 1, and is reflected back to the sound outlet 33 again, and then reflected into the sound channel 32, and pushes the cylinder 41 in the magnetic noise reduction component 4 to move again, and the cylinder 41 generates viscous friction with the viscous fluid during the movement, thereby reducing noise.

[0057] In this embodiment, a cavity structure is formed by a sound chamber and a sound-transmitting component, and a viscous fluid is filled in the cavity. At the same time, a rectifier component and a magnetic noise reduction component are arranged in the cavity. Sound can enter the cavity from the sound-transmitting component, and the rectifier component gathers and reflects the sound, and emits it again into the rectifier component when it reaches the inner wall of the sound chamber. At the same time, the magnetic noise reduction component moves back and forth in the rectifier component under the action of the sound wave pressure and its own magnetic force, and rubs against the viscous fluid to reduce noise, thereby reducing the noise of the sound entering the cavity, and the noise reduction effect is good. At the same time, this embodiment divides the sound chamber into multiple small chambers through a skeleton and a fixed bracket, and a rectifier component and a noise reduction component are correspondingly arranged in each small chamber, which can divert the sound entering the sound chamber and enhance the noise reduction effect.

[0058] Example 2

[0059] Embodiment 2 of the present invention provides a kitchen appliance, which includes the noise reduction structure 5 described in Embodiment 1, and the noise reduction structure 5 is arranged in the kitchen appliance.

[0060] In this embodiment, the kitchen appliance may be a dishwasher, a range hood, a gas water heater, etc.

[0061] Specifically, five noise reduction structures 5 are provided, which are respectively located on the four side surfaces and the bottom surface of the kitchen appliance.

[0062] like Figure 7 As shown, the noise reduction structure in Example 1 is applied to a dishwasher, which can significantly reduce the noise generated when the dishwasher is working.

[0063] This embodiment can significantly reduce the noise generated by the kitchen appliances when they are working by applying a noise reduction structure in the kitchen appliances, thereby solving the problem of the kitchen appliances generating loud noise when they are working, and effectively improving the product competitiveness of kitchen appliances such as dishwashers, range hoods, and gas water heaters.

[0064] Example 3

[0065] Embodiment 3 of the present invention provides a noise reduction control method, which is used to reduce the noise of the kitchen appliance described in Embodiment 2, such as Figure 8 As shown, the specific steps include:

[0066] S1, obtain the working power of kitchen appliances;

[0067] Specifically, it is used to select the working gear of the kitchen appliance according to the needs;

[0068] For example, when the kitchen appliance is a dishwasher, when there are many dishes to be washed, a high level can be selected, which corresponds to a higher working power;

[0069] For another example, when the kitchen appliance is a range hood, if there is a lot of oil smoke in the kitchen or the cooking method used produces a lot of oil smoke, you can choose a high wind speed;

[0070] S2, when the working power is greater than or equal to the power threshold, the magnetic noise reduction component 4 is turned on;

[0071] Generally speaking, the working power corresponding to the low gear of kitchen appliances is less than 600w, and the working power corresponding to the medium and high gear is greater than 600w. Therefore, the power threshold is set to 600w.

[0072] In a specific embodiment, the magnetic noise reduction component 4 is turned on, specifically:

[0073] S21, according to the working power of the kitchen appliance, the frequency range of the current noise is obtained; the kitchen appliance is preset with a corresponding relationship between the working power and the frequency range; wherein the kitchen appliance is preset with a corresponding relationship between the working power and the frequency range;

[0074] S22, applying current to the electromagnetic induction coil 43 of the magnetic noise reduction component 4, so that it drives the magnetic film 42 of the magnetic noise reduction component 4 to vibrate, and makes the vibration frequency of the magnetic film 42 within the current frequency range; wherein, the kitchen appliance has a preset correspondence between the current value of the current and the vibration frequency of the magnetic film 42.

[0075] In this embodiment, when the working power is less than 600w, the electromagnetic induction coil 43 is not turned on.

[0076] In addition, regardless of the current working power of the kitchen appliance, the method further includes:

[0077] S3, as long as the kitchen appliance is working, the rectifier component 3 will reduce noise, specifically:

[0078] The sound enters the cavity from the sound-permeable component 2, and then the sound inlet 31 gathers the sound, enhances the sound intensity, reflects, and makes the sound enter the sound channel 32, and pushes the cylinder 41 to move. Then the sound propagates to the sound outlet 33, reaches the inner wall of the sound chamber 1, and is reflected back to the sound outlet 33 again, gathered, and then reflected into the sound channel 32, and pushes the cylinder 41 to move again. During the movement, the cylinder 41 generates viscous friction with the viscous fluid, thereby reducing noise.

[0079] S4, after the kitchen appliance finishes working, the electromagnetic induction coil is turned off and the current is stopped, and the noise reduction ends.

[0080] This embodiment achieves an effective noise reduction effect without wasting energy by matching the current working power of the kitchen appliance, the frequency range of the noise, and the current applied to the electromagnetic induction coil one by one and adjusting them in real time.

[0081] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A noise reduction structure, characterized in that: It comprises a sound chamber (1), a sound-transmitting component (2), a rectification component (3) and a magnetic noise reduction component (4); the sound-transmitting component (2) covers the surface of the sound chamber (1), and the two together form a cavity; the rectification component (3) is arranged in the cavity to collect and reflect the sound entering through the sound-transmitting component (2); the magnetic noise reduction component (4) is arranged in the rectification component (3) with a gap between the two; the magnetic noise reduction component (4) vibrates under the action of sound waves and electromagnetic force, thereby generating friction to reduce noise; The noise reduction structure further comprises a viscous fluid, which is filled in the cavity; when the magnetic noise reduction component (4) vibrates, viscous friction is generated between the viscous fluid and the inner wall of the rectifying component (3) to reduce noise; The magnetic noise reduction component (4) comprises a hollow cylinder (41), a magnetic film (42) and an electromagnetic induction coil (43); the magnetic film covers the outer surface of the cylinder (41); the electromagnetic induction coil (43) is arranged on the inner surface of the sound chamber (1) and acts with the magnetic film (42) to drive the cylinder (41) to vibrate; The rectifying component (3) comprises a sound inlet (31), a sound channel (32) and a sound outlet (33) which are connected in sequence, the sound-permeable component (2) is in communication with the sound inlet (31), the sound inlet (31) and the sound outlet (33) are both horn-shaped structures, and the sound channel (32) is a tubular structure and is respectively connected to the minimum diameter of the sound inlet (31) and the sound outlet (33); The electromagnetic induction coil (43) drives the magnetic film (42) of the magnetic noise reduction component (4) to vibrate after current is applied thereto, and the vibration frequency of the magnetic film (42) is within the frequency range of the current noise; The frequency range of the current noise corresponds to the working power of the kitchen appliance.

2. A noise reduction structure according to claim 1, characterized in that: The outer surface of the cylinder (41) is provided with a plurality of first protrusions (44) for increasing the viscous friction force.

3. A noise reduction structure according to claim 2, characterized in that: The inner surface of the sound channel (32) is provided with a plurality of second protrusions (34) for increasing viscous friction force.

4. A noise reduction structure according to claim 3, characterized in that: The first protrusion (44) and the second protrusion (34) are dots or spikes.

5. A noise reduction structure according to claim 1, characterized in that: It also includes a frame (11) disposed in the sound chamber (1) and connected to the sound-permeable component (2), wherein the frame (11) is used to evenly divide the sound chamber (1) into a plurality of small chambers; the rectifier component (3) and the magnetic noise reduction component (4) are both in plurality and correspond one-to-one to the plurality of small chambers.

6. A noise reduction structure according to claim 1, characterized in that: The viscous fluid is lubricating oil, engine oil or water with thickener added.

7. A kitchen appliance, characterized in that: It comprises the noise reduction structure (5) according to any one of claims 1 to 6, and the noise reduction structure (5) is arranged in a kitchen appliance.

8. A noise reduction control method, characterized in that: It is used to reduce the noise of the kitchen appliance described in claim 7, and specifically comprises the following steps: S1, obtain the working power of kitchen appliances; S2, when the operating power is greater than or equal to the power threshold, turning on the magnetic noise reduction component (4).

9. A noise reduction control method according to claim 8, characterized in that: The opening of the magnetic noise reduction component (4) is specifically: S21, determining the frequency range of the current noise according to the working power of the kitchen appliance; wherein the kitchen appliance is preset with a corresponding relationship between the working power and the frequency range; S22, applying current to the electromagnetic induction coil (43) of the magnetic noise reduction component (4), so that it drives the magnetic film (42) of the magnetic noise reduction component (4) to vibrate, and making the frequency of the vibration of the magnetic film (42) within the frequency range of the current noise; wherein the kitchen appliance has a preset correspondence between the current value of the current and the frequency of the vibration of the magnetic film (42).

Images