Sound insulation cover assembly, cover body assembly and food processor

Abstract

The invention relates to the technical field of household appliances, and discloses a sound insulation cover assembly which comprises a first sound insulation cover and a second sound insulation cover. The first sound insulation cover comprises a first sound insulation cavity, and a first flow guide structure and a second flow guide structure are arranged in the first sound insulation cavity; the first flow guide structure is arranged at one end of the first sound insulation cavity, a first through hole is formed in the first flow guide structure, and the first through hole communicates with the first sound insulation cavity and the cup body; the second flow guide structure is arranged at the other end of the first sound insulation cavity, and a second through hole is formed in the second flow guide structure and communicates with the first sound insulation cavity and the outside. By arranging the first flow guide structure and the second flow guide structure on the first sound insulation cover, noise can enter the first sound insulation cavity from the cup body through the first flow guide structure and is fully reflected in the first sound insulation cavity through the cavity wall surface and the outer surfaces of the first flow guide structure and the second flow guide structure; and after being weakened by reflection, the light enters the external environment through the second flow guide structure, so that the noise reduction effect is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a sound insulation cover assembly, a cover body assembly and a food processor. Background Art

[0002] A soundproof cover assembly needs to be provided on the cover assembly of household appliances such as food processors and rice cookers to reduce the noise generated when the household appliances are in use.

[0003] At present, food processors such as wall breakers, soymilk machines, and juicers are very popular among users. Food processors use blades to beat food to cook it, but the beating process of the blades will generate a lot of noise, and the motor that drives the blades to beat will also rotate at a speed of up to tens of thousands of revolutions during operation. The mechanical noise of the motor is another major noise source of the food processor. For high-speed motors, the effect of optimizing the motor itself to achieve noise reduction is limited, and the noise value of the whole machine cannot reach the acceptable limit. In addition, the motor dissipates more heat when running at high speed, and a high-speed fan is required to dissipate the heat from the motor. The rotation noise caused by the high-speed rotation of the fan is also another major noise source of the food processor.

[0004] The single cavity silencer structure uses the principle that sound waves are constantly reflected and collided in the cavity and finally converted into heat energy to dissipate to achieve noise reduction. When the noise frequency is consistent with the cavity's natural frequency, the noise reduction effect is optimal. There are many noise sources in a food processor. If only a single cavity silencer structure is used, the noise reduction effect is still poor. Summary of the invention

[0005] In view of this, the present invention provides a sound insulation cover assembly, a cover body assembly and a food processor to solve the problem that the food processor adopts a single cavity silencer structure and has a poor noise reduction effect.

[0006] In a first aspect, the present invention provides a sound insulation cover assembly, comprising:

[0007] A first soundproof cover, adapted to be connected to the cover of the household appliance;

[0008] The first sound insulation cover comprises a first sound insulation cavity, and at least one first flow guiding structure and at least one second flow guiding structure are arranged in the first sound insulation cavity;

[0009] The first flow guiding structure is arranged at one end of the first sound insulation cavity close to the cover of the household appliance, and a first through hole is arranged on the first flow guiding structure, one end of the first through hole is connected to the first sound insulation cavity, and the other end is connected to the cover of the household appliance;

[0010] The second flow guiding structure is arranged at one end of the first sound insulation cavity away from the cover of the household appliance, and the second flow guiding structure is provided with a second through hole, which is respectively connected with the first sound insulation cavity and the outside.

[0011] Beneficial effect: By setting a first sound insulation cavity on the first sound insulation cover, and setting a first guide structure with a first through hole and a second guide structure with a second through hole in the first sound insulation cavity, the noise during the operation of the household appliance can enter the first sound insulation cavity from the cover of the household appliance through the first through hole of the first guide structure, and be fully reflected by the cavity wall and the outer surface of the first guide structure and the outer surface of the second guide structure in the first sound insulation cavity, and then enter the external environment through the second through hole of the second guide structure after the reflection is weakened. By setting the first guide structure and the second guide structure in the first sound insulation cavity, the number of reflections of sound waves in the first sound insulation cavity can be increased, thereby enhancing the noise reduction effect.

[0012] In an optional embodiment, the first flow guiding structure and the second flow guiding structure are opposite to each other and are staggered.

[0013] Beneficial effect: Since the first flow guide structure and the second flow guide structure are staggered, the sound waves will not directly enter from the first through hole of the first flow guide structure and then flow out from the second through hole of the second flow guide structure, thereby ensuring the noise reduction effect of the sound waves. Since the first flow guide structure and the second flow guide structure are relatively arranged, the phase of the reflected noise wave can be controlled to offset each other, thereby enhancing the noise reduction effect of the first sound insulation chamber.

[0014] In an optional embodiment, the extension direction of the first sound insulation cavity from the side close to the cover body of the household appliance to the side away from the cover body of the household appliance is the height direction, and in the height direction, the average height of the first sound insulation cavity is L, then the height of the first flow guide structure is L / 2, and the height of the second flow guide structure is L / 4.

[0015] Beneficial effect: By setting the height of the first guide structure to half of the average height of the first sound insulation cavity and the height of the second guide structure to 1 / 4 of the average height of the first sound insulation cavity, the noise waves transmitted to the first sound insulation cavity can have a phase difference of 180°, the amplitudes of the noise waves are equal and the phases are opposite, and they can interfere with each other and cancel each other out, thereby achieving an ideal sound insulation effect.

[0016] In an optional embodiment, an end of the first flow guiding structure away from the cover of the household appliance is higher than an end of the second flow guiding structure close to the cover of the household appliance.

[0017] Beneficial effect: By setting the end of the first guide structure away from the cover of the household appliance higher than the end of the second guide structure close to the cover of the household appliance, the noise waves entering the first sound insulation cavity from the first guide structure can directly collide with the cavity of the first sound insulation cavity, and then be transmitted to the external environment through the second guide structure after being fully reflected by the inner wall of the cavity, thereby increasing the number of reflections of the noise waves and enhancing the noise reduction performance of the sound insulation cover assembly.

[0018] In an optional embodiment, the extension direction of the first sound insulation cavity from the side close to the cover body of the household appliance to the side away from the cover body of the household appliance is the height direction, and in the width direction perpendicular to the height direction, the width distance between the first guide structure and the second guide structure is A, the radial width of the first guide structure is R1, and the radial width of the second guide structure is R2, then A>(R1+R2) / 2.

[0019] Beneficial effect: By staggering the first guide structure and the second guide structure in the width direction, it is ensured that the noise wave can enter the cavity after entering the first sound insulation cavity, rather than being directly transmitted from the second guide structure, thereby enhancing the noise reduction performance.

[0020] In an optional embodiment, the cross-sectional area of ​​the first through hole and the second through hole is not less than 0.000019625 m 2 .

[0021] Beneficial effect: By setting the cross-sectional area of ​​the first through hole and the second through hole to be not less than 0.000019625m 2 , to prevent the first through hole and the second through hole from being set too small, making it inconvenient to guide air.

[0022] In an optional embodiment, the first sound insulation cavity has a conical design on one side close to the cover of the household appliance, and at least one water outlet is provided at the bottom of the first sound insulation cavity, and the water outlet is connected to the interior of the household appliance.

[0023] Beneficial effect: By setting a conical structure on one side of the first sound insulation cavity close to the cover of the household appliance and setting a water outlet at the bottom, water can be discharged in time after water enters the first sound insulation cavity, preventing water from accumulating in the first sound insulation cavity and affecting the noise reduction effect.

[0024] In an optional embodiment, the water outlet is provided in multiple numbers, including:

[0025] A first water outlet hole is located at the bottom of the first sound insulation cavity;

[0026] A plurality of second water outlet holes are arranged around the periphery of the first water outlet hole.

[0027] In an optional embodiment, the sound insulation cover assembly includes: a reflux structure, which is arranged at the first water outlet, suitable for preventing water inside the household appliance from entering the first sound insulation cavity and allowing water in the first sound insulation cavity to flow back to the interior of the household appliance.

[0028] In an optional embodiment, the reflux structure includes:

[0029] A first connecting portion is disposed in the first water outlet, and an extension height of the first connecting portion is slightly greater than an extension height of the water outlet;

[0030] a first convex portion, connected to an end of the first connecting portion away from the interior of the household appliance, disposed in the first sound insulation cavity, wherein a cross-sectional dimension of the first convex portion is slightly larger than the first water outlet;

[0031] The second convex portion is connected to the other end of the first connecting portion and is disposed outside the first sound insulation cavity. The cross-sectional size of the second convex portion is sufficient to cover all water outlet holes.

[0032] Beneficial effect: By setting the reflux structure to include a first convex part, a first connecting part, and a second convex part, the reflux structure has the function of a one-way valve. Due to the effect of gravity, the first convex part will be set up at the first water outlet. When water tends to flow upward from the cover of the household appliance into the first sound insulation cavity, the second convex part will be pressed upward. Since the cross-sectional size of the second convex part can cover all the water outlets, water cannot enter the first sound insulation cavity from the water outlets. When the impact of water in the household appliance is too large, the water level enters the first sound insulation cavity through the first guide structure, and the water in the first sound insulation cavity can push the second convex part of the reflux structure by its own gravity, and discharge the water from the second water outlet. Setting a reflux structure can realize the water blocking and drainage functions of the first sound insulation cavity, and the structure is relatively simple.

[0033] In an optional embodiment, the sound insulation cover assembly includes: at least one second sound insulation cover connected to the first sound insulation cover, the second sound insulation cover is provided with at least one second sound insulation cavity, and the second sound insulation cavity is respectively connected to the interior of the household appliance and the first sound insulation cavity.

[0034] Beneficial effect: By configuring the sound insulation cover assembly to include at least one second sound insulation cover, and the second sound insulation cover is provided with a second sound insulation cavity, it can be combined with the first sound insulation cover to form a multi-cavity structure. The multi-cavity structure increases the number of reflections of sound waves and improves the noise reduction effect.

[0035] In an optional embodiment, the second sound insulation cavity has a conical design on one side close to the cover of the household appliance, and at least one third water outlet is provided at the bottom of the second sound insulation cavity, and the third water outlet is connected to the interior of the household appliance.

[0036] Beneficial effect: By setting a conical structure on one side of the cover of the second sound insulation cavity close to the household appliance and setting a water outlet at the bottom, water can be discharged in time after water enters the second sound insulation cavity, preventing water from accumulating in the second sound insulation cavity and affecting the noise reduction effect.

[0037] In an optional embodiment, the third water outlet hole and the first flow guiding structure are arranged in a staggered manner.

[0038] Beneficial effect: When the household appliance is working, if the liquid in the household appliance surges upward from the cover of the household appliance, it will flow upward through the third water outlet. By staggering the third water outlet and the first guide structure, it can play a certain water blocking role, effectively preventing the whipped liquid in the household appliance from entering the first sound insulation cavity through the first through hole of the first guide structure, affecting the noise reduction performance.

[0039] In an optional embodiment, the first sound insulation cover is detachably connected to the second sound insulation cover.

[0040] Beneficial effect: Since the second sound insulation cover is connected to the cover body of the household appliance, the probability of liquid in the household appliance entering the second sound insulation cover is relatively high. By detachably connecting the first sound insulation cover with the second sound insulation cover, the second sound insulation cover can be easily disassembled and cleaned.

[0041] In an optional embodiment, the volumes of the first sound insulation cavity and the second sound insulation cavity are different.

[0042] Beneficial effect: By setting the volumes of the first sound insulation cavity and the second sound insulation cavity differently, their own natural frequencies are different, so their optimal noise reduction frequencies and noise reduction frequency bands are also different. Therefore, by jointly designing parameters such as the volume and size of the first sound insulation cavity and the second sound insulation cavity, they can respectively reduce noise in different noise source frequency bands, thereby enabling the overall structure of the sound insulation cover assembly to have a better noise reduction effect in a wider noise source frequency band. The noise reduction frequency band of the entire sound insulation cover assembly can be estimated as the union of the noise reduction frequency bands of the first sound insulation cavity and the second sound insulation cavity, with a wider noise reduction frequency band and a greater amount of attenuation.

[0043] In an optional embodiment, the volume of the first sound insulation cavity is greater than the volume of the second sound insulation cavity.

[0044] Beneficial effect: By setting the volume of the first sound insulation cavity to be larger than the volume of the second sound insulation cavity, guiding and positioning are facilitated, and assembly and installation are facilitated.

[0045] In an optional embodiment, a plurality of ribs are provided on the inner wall of the first sound insulation cavity and / or the second sound insulation cavity.

[0046] Beneficial effect: By arranging a plurality of ribs on the inner walls of the first sound insulation cavity and the second sound insulation cavity, the number of reflections of sound waves can be increased and the noise reduction effect can be improved.

[0047] In an optional embodiment, the ribs are of irregular shape.

[0048] Beneficial effect: By setting the ribs to an irregular shape, the noise waves can be reflected in all directions, increasing the number of reflections of the sound waves and achieving a better noise reduction effect.

[0049] In an optional embodiment, the household appliance is a food processor.

[0050] In a second aspect, the present invention further provides a cover assembly, comprising:

[0051] A cover body, wherein the cover body is provided with an opening;

[0052] The above-mentioned sound insulation cover assembly is arranged at the opening.

[0053] Beneficial effect: Because the cover body assembly includes the above-mentioned sound insulation cover assembly, it has the same technical effect as the sound insulation cover assembly, which will not be repeated here.

[0054] In an optional embodiment, the sound insulation cover assembly is connected to the opening by interference fit.

[0055] Beneficial effect: By connecting the sound insulation cover assembly with the opening on the cover body through interference fit, it is convenient for the user to remove the sound insulation cover assembly from the cover body. During the operation of the food processor, if the user forgets to add some ingredients, the sound insulation cover assembly can be easily taken out and the cup body can be temporarily added from the opening, which is convenient and quick.

[0056] In a third aspect, the present invention further provides a food processor, comprising: the above-mentioned cover assembly.

[0057] Beneficial effect: Because the food processor includes the above-mentioned cover assembly, it has the same technical effect as the cover assembly, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0059] Figure 1 An exploded view of a sound insulation cover assembly according to an embodiment of the present invention;

[0060] Figure 2 for Figure 1 a cross-sectional view of the soundproof cover assembly shown;

[0061] Figure 3 is a cross-sectional view of a first sound insulation cover of the sound insulation cover assembly;

[0062] Figure 4 is a cross-sectional view of a first sound insulation cover of the sound insulation cover assembly;

[0063] Figure 5 A top view of a first sound insulation cavity of a first sound insulation cover;

[0064] Figure 6 It is a structural schematic diagram of the reflux structure of the sound insulation cover assembly;

[0065] Figure 7 is a cross-sectional view of a second sound insulation cover of the sound insulation cover assembly;

[0066] Figure 8 It is the sound loss simulation curve of the sound insulation cover assembly;

[0067] Fig. 9 An exploded view of another cover assembly according to an embodiment of the present invention;

[0068] Fig.10 is a cross-sectional view of the cover assembly;

[0069] Fig.11 is a schematic structural diagram of a first sealing device of a cover assembly;

[0070] Fig.12 is a cross-sectional view of the cover assembly;

[0071] Fig.13 It is a partial cross-sectional view of the first sealing device.

[0072] Description of reference numerals:

[0073] 1-first soundproof cover; 101-first cover body; 1011-second flow guide structure; 10111-second through hole; 102-soundproof seat; 1021-first flow guide structure; 10211-first through hole; 1022-first water outlet hole; 1023-second water outlet hole; 1024-third connecting part; 103-first soundproof cavity; 104-backflow structure; 1041-first connecting part; 1042-first convex part; 1043-second convex part;

[0074] 2-second sound insulation cover; 201-second sound insulation cavity; 202-third water outlet; 203-sound insulation cover body; 2031-limiting boss; 2032-groove;

[0075] 3-first sealing device; 301-sealing body; 302-first sealing rib; 303-second connecting portion; 304-hook portion; 305-second sealing rib;

[0076] 4-cover; 401-opening; 402-second cover; 403-third cover;

[0077] 5- Second sealing device. DETAILED DESCRIPTION

[0078] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0079] If household appliances such as food processors, rice cookers, and electric pressure cookers make a lot of noise when in use, it will affect the user experience. The present invention provides a sound insulation cover assembly that can be used to reduce the noise of household appliances. The following is an example of the use of the sound insulation cover assembly in a food processor. Of course, the sound insulation cover assembly can also be used to reduce the noise of household appliances such as rice cookers and electric pressure cookers, or for any other equipment that requires noise reduction, and there are no excessive restrictions here.

[0080] Combine the following Figures 1 to 13 , describing an embodiment of the present invention.

[0081] According to an embodiment of the present invention, on the one hand, a sound insulation cover assembly is provided, the food processor includes a cup body and a cover body 4 arranged on the cup body, the sound insulation cover assembly includes: a first sound insulation cover 1, connected to the cover body 4; the first sound insulation cover 1 includes a first sound insulation cavity 103, and the first sound insulation cavity 103 is provided with at least one first flow guide structure 1021 and at least one second flow guide structure 1011; the first flow guide structure 1021 is arranged at one end of the first sound insulation cavity 103 close to the cup body, and the first flow guide structure 1021 is provided with a first through hole 10211, and the first through hole 10211 is respectively connected to the first sound insulation cavity 103 and the cup body; the second flow guide structure 1011 is arranged at one end of the first sound insulation cavity 103 away from the cup body, and the second flow guide structure 1011 is provided with a second through hole 10111, and the second through hole 10111 is respectively connected to the first sound insulation cavity 103 and the outside.

[0082] By setting the first soundproof cavity 103 on the first soundproof cover 1, and setting the first guide structure 1021 with the first through hole 10211 and the second guide structure 1011 with the second through hole 10111 in the first soundproof cavity 103, the noise of the food processor during operation can enter the first soundproof cavity 103 from the cup body through the first through hole 10211 of the first guide structure 1021, and be fully reflected by the cavity wall and the outer surface of the first guide structure and the outer surface of the second guide structure in the first soundproof cavity 103, and then enter the external environment through the second through hole 10111 of the second guide structure 1011 after the reflection is weakened. By setting the first guide structure 1021 and the second guide structure 1011 in the first soundproof cavity 103, the number of reflections of sound waves in the first soundproof cavity 103 can be increased, thereby enhancing the noise reduction effect.

[0083] In this embodiment, the first flow guiding structure 1021 and the second flow guiding structure 1011 are opposite to each other and staggered.

[0084] Since the first flow-guiding structure 1021 and the second flow-guiding structure 1011 are staggered, the sound waves will not directly enter from the first through hole 10211 of the first flow-guiding structure 1021 and then flow out from the second through hole 10111 of the second flow-guiding structure 1011, thereby ensuring the noise reduction effect on the sound waves. Since the first flow-guiding structure 1021 and the second flow-guiding structure 1011 are arranged relative to each other, the phase of the reflected noise wave can be controlled to offset each other and strengthen the noise reduction effect of the first soundproof cavity 103. At the same time, since the food processor is heating food, the first flow-guiding structure 1021 and the second flow-guiding structure 1011 can also achieve the function of guiding steam, quickly guiding air, and preventing the food processor from overflowing liquid due to excessive air pressure in the cup body. As a convertible embodiment, it can also be that the first flow-guiding structure 1021 and the second flow-guiding structure 1011 are arranged relative to each other, or the first flow-guiding structure 1021 and the second flow-guiding structure 1011 are staggered. When the noise sound waves in the cup body propagate from bottom to top, in order to prevent the noise sound waves from entering the first sound insulation cavity 103 from the first guide structure 1021 and then directly entering the second guide structure 1011, the first guide structure 1021 and the second guide structure 1011 are staggered in the height direction. The extension direction of the first sound insulation cavity 103 from the side close to the cup body to the side away from the cup body is the height direction, and the height direction is the height direction of the attached Figure 2 The up and down directions in .

[0085] Specifically, Figure 3As shown, the average height of the first soundproof cavity 103 is L, then the height of the first flow-guiding structure 1021 is L / 2, and the height of the second flow-guiding structure 1011 is L / 4. By setting the height of the first flow-guiding structure 1021 to half of the average height of the first soundproof cavity 103, and the height of the second flow-guiding structure 1011 to 1 / 4 of the average height of the first soundproof cavity 103, the noise waves transmitted to the first soundproof cavity 103 can differ in phase by 180°, and the amplitudes of the noise waves are equal and the phases are opposite, and they can interfere with each other and cancel each other, thereby achieving an ideal sound-absorbing effect. As a convertible embodiment, it is also possible that the heights of the first flow-guiding structure 1021 and the second flow-guiding structure 1011 are set to other specific sizes according to actual needs, and there are no excessive restrictions here.

[0086] As a convertible embodiment, the end of the first flow-guiding structure 1021 away from the cup body may be higher than the end of the second flow-guiding structure 1011 close to the cup body. That is, the top of the first flow-guiding structure 1021 is higher than the bottom of the second flow-guiding structure 1011. By setting the end of the first flow-guiding structure 1021 away from the cup body higher than the end of the second flow-guiding structure 1011 close to the cup body, the noise wave entering the first soundproof cavity 103 from the first flow-guiding structure 1021 can directly collide with the cavity of the first soundproof cavity 103, and then be fully reflected by the inner wall of the cavity and transmitted to the external environment through the second flow-guiding structure 1011, thereby increasing the number of reflections of the noise wave and enhancing the noise reduction performance of the soundproof cover assembly.

[0087] like Figure 2 As shown, the first sound insulation cavity 103 extends from the side close to the cup body to the side away from the cup body in the height direction, and in the width direction perpendicular to the height direction, i.e. Figure 2 In the left and right directions, the first guide structure 1021 and the second guide structure 1011 are staggered. By staggering the first guide structure 1021 and the second guide structure 1011 in the width direction, it is ensured that the noise wave can enter the first sound insulation cavity 103 and enter the cavity instead of being directly transmitted from the second guide structure 1011, thereby enhancing the noise reduction performance.

[0088] Specifically, Figure 4As shown, the width distance between the first flow-guiding structure 1021 and the second flow-guiding structure 1011 is A, the radial width of the first flow-guiding structure 1021 is R1, and the radial width of the second flow-guiding structure 1011 is R2, then A>(R1+R2) / 2. Wherein, the first flow-guiding structure 1021 and the second flow-guiding structure 1011 are flow-guiding columns, which are cylindrical in shape, and the width distance between the first flow-guiding structure 1021 and the second flow-guiding structure 1011 is greater than the width distance between the central axes of the two flow-guiding structures, and the radial width of the first flow-guiding structure 1021 and the second flow-guiding structure 1011 is the diameter of the circular cross-section. If the first flow guiding structure 1021 and the second flow guiding structure 1011 are non-cylindrical shapes, the width distance between the first flow guiding structure 1021 and the second flow guiding structure 1011 must be greater than half of the sum of the maximum width distances of the cross sections of the two flow guiding structures, and the radial width of the first flow guiding structure 1021 and the second flow guiding structure 1011 is the maximum width of their cross sections.

[0089] In order to facilitate air conduction, the cross-sectional area of ​​the first through hole 10211 and the second through hole 10111 is not less than 0.000019625m 2 That is, the first through hole 10211 and the second through hole 10111 are set as circular holes, and the diameter of the circular holes is not less than 5 mm.

[0090] When the food processor is working, the blades rotate and beat the liquid. The liquid in the cup will be thrown outward under the action of centrifugal force, forming a concave vortex in the center of the liquid surface. Therefore, the distance from the cover to the liquid surface can be increased as much as possible, and the entire cover can be designed into a conical structure. The closer to the liquid surface, the smaller the cross-sectional area of ​​the cover, so that it fits the vortex shape, thereby reducing the amount of liquid that may enter the sound insulation cover assembly.

[0091] Specific as Figure 2 As shown, the first soundproof cavity 103 has a conical design on one side close to the cup body, that is, a structure with high sides and low middle. At least one water outlet is provided at the bottom of the first soundproof cavity 103, and the water outlet is connected to the cup body. By providing a conical structure on the side close to the cup body of the first soundproof cavity 103 and providing a water outlet at the bottom, water can be discharged in time after water enters the first soundproof cavity 103, so as to prevent water from accumulating in the first soundproof cavity 103 and affecting the noise reduction effect.

[0092] like Figure 5 As shown, there are multiple water outlets, including: a first water outlet 1022, located at the bottom of the first sound insulation cavity 103; four second water outlets 1023, arranged around the periphery of the first water outlet 1022. As a convertible embodiment, it is also possible that only one water outlet is arranged at the lowest point of the first sound insulation cavity 103; or, one, two, three or more second water outlets 1023 are arranged.

[0093] In order to ensure that no water accumulates in the first soundproof cavity 103, the soundproof cover assembly includes: a reflux structure 104, which is arranged at the first water outlet 1022 and is suitable for preventing water in the cup body from entering the first soundproof cavity 103 and allowing water in the first soundproof cavity 103 to flow back to the cup body.

[0094] Specifically, Figure 6 As shown, the reflux structure 104 includes: a first connecting portion 1041, which is arranged in the first water outlet 1022, and the extension height of the first connecting portion 1041 is slightly larger than the extension height of the water outlet; a first convex portion 1042, which is connected to the end of the first connecting portion 1041 away from the cup body and is arranged in the first soundproof cavity 103, and the cross-sectional size of the first convex portion 1042 is slightly larger than the first water outlet 1022; a second convex portion 1043, which is connected to the other end of the first connecting portion 1041 and is arranged outside the first soundproof cavity 103, and the cross-sectional size of the second convex portion 1043 is sufficient to cover all water outlets.

[0095] By setting the reflux structure 104 to include a first convex portion 1042, a first connecting portion 1041 and a second convex portion 1043, the reflux structure 104 can move up and down and function as a one-way valve. Due to the action of gravity, the first convex portion 1042 will be set at the first water outlet 1022. When water tends to flow upward from the cup body into the first sound insulation cavity 103, the second convex portion 1043 will be pressed upward. Since the cross-sectional size of the second convex portion 1043 can cover all water outlets, water cannot enter the first sound insulation cavity 103 from the water outlets; when the impact of water in the cup body is too large, the water level enters the first sound insulation cavity 103 through the first flow guide structure 1021, and the water in the first sound insulation cavity 103 can push the second convex portion 1043 of the reflux structure 104 by its own gravity, and discharge the water outward from the second water outlet 1023. A reflux structure 104 can be provided to realize the water blocking and drainage functions of the first sound insulation cavity 103, and the structure is relatively simple.

[0096] As a convertible implementation, the reflux structure 104 may also be a one-way valve.

[0097] like Figure 2As shown, the soundproof cover assembly includes: a second soundproof cover 2, connected to the bottom of the first soundproof cover 1, located between the first soundproof cover 1 and the cover body 4, and a second soundproof cavity 201 is provided on the second soundproof cover 2, and the second soundproof cavity 201 is communicated with the cup body and the first soundproof cavity 103 respectively. By configuring the soundproof cover assembly to include the second soundproof cover 2, and the second soundproof cover 2 is provided with the second soundproof cavity 201, it can be combined with the first soundproof cover 1 into a multi-cavity structure, and the multi-cavity structure increases the number of reflections of sound waves and improves the noise reduction effect. As a convertible embodiment, it is also possible that the second soundproof cover 2 is provided in plurality, or that a plurality of second soundproof cavities 201 are provided on a second soundproof cover 2, and the plurality of second soundproof cavities 201 are communicated.

[0098] Similarly, the side of the second soundproofing cavity 201 close to the cup body is designed in a conical shape, that is, a structure with high sides and low middle. A third water outlet 202 is provided at the bottom of the second soundproofing cavity 201, and the third water outlet 202 is connected to the cup body. By providing a conical structure on the side of the second soundproofing cavity 201 close to the cup body and providing a water outlet at the bottom, water can be discharged in time after water enters the second soundproofing cavity 201, preventing water from accumulating in the second soundproofing cavity 201 and affecting the noise reduction effect. As a convertible embodiment, it is also possible that a plurality of third water outlets 202 are provided.

[0099] The third water outlet 202 and the first flow guiding structure 1021 are arranged in a staggered manner.

[0100] When the food processor is working, if the liquid in the cup body surges upward from the cup body, it will flow upward through the third water outlet 202. By staggering the third water outlet 202 and the first flow guide structure 1021, a certain water blocking effect can be achieved, which effectively prevents the whipped liquid in the cup body from entering the first sound insulation cavity 103 through the first through hole 10211 of the first flow guide structure 1021, thereby affecting the noise reduction performance.

[0101] For ease of assembly, the first soundproofing cover 1 and the second soundproofing cover 2 are detachably connected. Since the second soundproofing cover 2 is connected to the cover body 4, the probability of the liquid in the cup body entering the second soundproofing cover 2 is relatively high. By detachably connecting the first soundproofing cover 1 and the second soundproofing cover 2, it is convenient to disassemble and clean the second soundproofing cover 2. As a convertible embodiment, the first soundproofing cover 1 and the second soundproofing cover 2 can also be integrally formed.

[0102] Specifically, a third connection portion 1024 is provided at the bottom of the first soundproofing cover 1, a thread is provided on the outer side of the third connection portion 1024, a thread is provided on the inner side of the second soundproofing cover 2, and the first soundproofing cover 1 and the second soundproofing cover 2 are connected together by screwing.

[0103] In this embodiment, the volumes of the first soundproof cavity 103 and the second soundproof cavity 201 are different. By setting the volumes of the first soundproof cavity 103 and the second soundproof cavity 201 to be different, their own natural frequencies are different, and their optimal noise reduction frequencies and noise reduction frequency bands are also different. Therefore, the first soundproof cavity 103 and the second soundproof cavity 201 can be jointly designed with parameters such as the volume and size to respectively reduce noise in different noise source frequency bands, thereby enabling the overall structure of the soundproof cover assembly to have a better noise reduction effect in a wider noise source frequency band. The noise reduction frequency band of the entire soundproof cover assembly can be estimated as the union of the noise reduction frequency bands of the first soundproof cavity 103 and the second soundproof cavity 201, with a wider noise reduction frequency band and a greater amount of noise reduction. As a convertible embodiment, it can also be that the volumes of the first soundproof cavity 103 and the second soundproof cavity 201 are the same.

[0104] The upper and lower noise reduction frequencies f of a single soundproof cavity 上 and f 下 It can be estimated by the following formula:

[0105]

[0106]

[0107] Where: c-sound speed in air, m / s; D-average diameter of the soundproof cavity, m. When the soundproof cavity is a columnar structure, the average diameter is the average of all diameters. When the soundproof cavity is an irregular structure, the volume of the soundproof cavity is divided by the height to get the average cross-sectional area. The diameter of a circle with the same area as the average cross-sectional area is the average diameter; S-inlet and outlet cross-sectional areas of the soundproof cavity. Here, the inlet and outlet cross-sectional areas are equal and are both S, unit: m 2 For example, for the first sound insulation cavity 103, the inlet is the first through hole 10211 and the outlet is the second through hole 10111; for the second sound insulation cavity 201, the inlet is the third water outlet 202 and the outlet is the first through hole 10211; V-the volume of the sound insulation cavity, m 3 ; L-average depth or height of the soundproof cavity, m.

[0108] The simulated sound loss curve of the sound insulation cover assembly changes with the frequency of the noise source. Figure 8 As shown, the entire sound insulation cover assembly has a good noise reduction effect in the noise source frequency band of 0 to 8000 Hz, and the noise reduction effect is best in the 1500 Hz and 5000 Hz frequency bands.

[0109] The volume of the first soundproof cavity 103 is larger than the volume of the second soundproof cavity 201. By setting the volume of the first soundproof cavity 103 to be larger than the volume of the second soundproof cavity 201, it is convenient to guide and position, and to facilitate assembly and installation. As a convertible embodiment, the volume of the first soundproof cavity 103 may be smaller than the volume of the second soundproof cavity 201.

[0110] In one embodiment, a plurality of ribs are provided on the inner walls of the first soundproof cavity 103 and the second soundproof cavity 201. By providing a plurality of ribs on the inner walls of the first soundproof cavity 103 and the second soundproof cavity 201, the number of reflections of sound waves can be increased and the noise reduction effect can be improved. As a convertible embodiment, it is also possible that no ribs are provided on the inner walls of the first soundproof cavity 103 and the second soundproof cavity 201, or one rib is provided, and the rib is provided in a ring shape along the circumference of the cavity wall.

[0111] Specifically, the ribs are irregular in shape. The irregular shape here refers to a figure with a cross section other than a rectangle, square, trapezoid, parallelogram, rhombus, or circle, specifically a shape with many angles, which can make the sound waves reflect in all directions, increasing the number of reflections of the sound waves. By setting the ribs to irregular shapes, the noise waves can be reflected in all directions, increasing the number of reflections of the sound waves, and achieving a better noise reduction effect. As a convertible embodiment, the ribs can also be regular in shape.

[0112] like Figures 9 to 13 According to an embodiment of the present invention, on the other hand, a cover assembly is provided, including: a cover 4, on which an opening 401 is provided; and the above-mentioned soundproof cover assembly, which is arranged at the opening 401. For a food processor, the cover assembly is its cup cover assembly, and the cover 4 is its cup cover.

[0113] Specifically, the soundproof cover assembly is connected to the opening 401 by interference fit. By connecting the soundproof cover assembly to the opening 401 on the cover body 4 by interference fit, it is convenient for the user to remove the soundproof cover assembly from the cover body 4. During the operation of the food processor, if the user forgets to add a certain ingredient, the soundproof cover assembly can be easily taken out, and the cup body can be temporarily added from the opening 401, which is convenient and quick. As a convertible embodiment, the soundproof cover assembly can also be screwed and connected to the opening 401 of the cover body 4. As a convertible embodiment, the soundproof cover assembly can also be integrally formed on the cover body 4.

[0114] like Fig. 9 and Fig.10 As shown, the cover body 4 includes: a second cover body 402, a third cover body 403 and a second sealing device 5, the second cover body 402 is connected to the top of the third cover body 403, and the soundproof cover assembly is interference-fitted on the third cover body 403 through a first sealing cover device. The second cover body 402 and the third cover body 403 are assembled together by snaps to form a handle cover, and the handle cover is then interference-fitted with the cup body at the cup mouth through the second sealing device 5. Among them, the second sealing device 5 is a sealing rubber.

[0115] During the operation of the food processor, if it is found that the amount of ingredients is small or a certain ingredient is forgotten to be added, the entire sound insulation cover assembly can be taken out from the opening 401 of the cover body 4 for temporary addition of ingredients, which is convenient and quick.

[0116] The soundproof cover assembly in this embodiment includes: a first sealing device 3, connected between the second soundproof cover 2 and the cover body 4, and the first sealing device 3 is arranged at the opening 401. By arranging the first sealing device 3 between the second soundproof cover 2 and the cover body 4, the sealing effect between the second soundproof cover 2 and the cover body 4 can be achieved, preventing the liquid in the cup body from entering the first soundproof cavity 103 through the gap between the second soundproof cover 2 and the cover body 4.

[0117] The first sealing device 3 is made of elastic material, specifically food-grade silicone, and the thickness can be set to be above 0.2 mm, so that it can effectively absorb the steam and water droplets generated during the operation of the food processor without affecting the taste of the food. By setting the first sealing device 3 to be an elastic material, when the second soundproof cover 2 is installed on the cover body 4, the sealing of the two can be achieved by squeezing elastic deformation. As a convertible embodiment, the first sealing device 3 can also be a sealing rubber or other materials with the same sealing function.

[0118] like Fig.11 As shown, the first sealing device 3 includes: a sealing body 301, and two sealing ribs convexly arranged on the outside of the sealing body 301, and the sealing ribs are arranged between the second sound insulation cover 2 and the cover body 4. The sealing ribs are annular structures. By arranging the sealing ribs on the first sealing device 3, the sealing effect can be increased. As a convertible embodiment, it is also possible that the sealing ribs are arranged as one, or more.

[0119] The cover 4 of the food processor is provided with an opening 401, and a first sealing device 3 is provided at the opening 401. The sealing ribs include: a first sealing rib 302, which is annularly convexly arranged on the outer side of the sealing body 301, and the first sealing rib 302 is arranged on a side of the first sealing device 3 close to the opening 401, and Fig.12 As shown, the radial width D1 of the first sealing rib 302 is greater than the radial width D0 of the opening 401. The radial width here refers to the dimension along the width direction. When the cross-sectional areas of the opening 401 and the first sealing rib 302 are both circular, the radial width is the diameter thereof; when the cross-sectional areas of the opening 401 and the first sealing rib 302 are non-circular, the radial width is the maximum dimension thereof in the width direction.

[0120] By providing a first sealing rib 302 with an annular structure on one side of the opening 401 of the first sealing device 3 close to the cover body 4, and the radial width D1 of the first sealing rib 302 is greater than the radial width D0 of the opening 401, when the first sealing device 3 is assembled to the opening 401, the first sealing rib 302 can be squeezed into the opening 401 by extrusion. When the first sealing rib 302 extends from the opening 401, it represents that the first sealing device 3 is assembled in place. At this time, since the radial width of the first sealing rib 302 is greater than the radial width of the opening 401, the first sealing rib 302 can also play a role in blocking the opening 401, thereby preventing the sound insulation cover assembly from being lifted up and displaced, and preventing water vapor from splashing out and accidentally injuring the user during the displacement.

[0121] In order to enhance the sealing effect, the sealing rib further includes a second sealing rib 305 , which is annularly convexly arranged on the outer side of the sealing body 301 and is located between the first sealing rib 302 and the second sound insulation cover 2 in the height direction.

[0122] like Figure 7 As shown, an annular groove 2032 is provided on the outer side of the second soundproof cover 2, and the groove 2032 is provided corresponding to the second sealing rib 305. By providing an annular groove 2032 on the outer side of the second soundproof cover 2, and the groove 2032 is provided corresponding to the second sealing rib 305, the first sealing device 3 can be tightly attached to the second soundproof cover 2 by squeezing the second sealing rib 305 when the first sealing device 3 is assembled, ensuring that the first sealing device 3 will not fall off, the sealing is tighter, and the reliability of the sealing is greatly improved, thereby reducing the production and precision requirements between various components.

[0123] When the first soundproof cover 1 and the second soundproof cover 2 of the soundproof cover assembly are detachably connected, there will be a gap between the two, and there will be a problem of poor sealing. The first sealing device 3 in this embodiment also includes a barb structure, which includes: a second connecting portion 303, one end of which is connected to the end of the sealing body 301 away from the cup body, and in the height direction, the second connecting portion 303 is arranged between the second soundproof cover 2 and the cover body 4; a return hook portion 304, one end of which is connected to the other end of the second connecting portion 303, and the other end is bent between the second soundproof cover 2 and the first soundproof cover 1. Among them, the extension direction of the second connecting portion 303 is the same as the extension direction of the sealing rib, but the sealing rib is arranged between the second soundproof cover 2 and the cover body 4 in the height direction, and the second connecting portion 303 is arranged between the second soundproof cover 2 and the cover body 4 in the width direction.

[0124] By configuring the first sealing device 3 to include a barb structure, the hook portion 304 of the barb structure is disposed between the second soundproof cover 2 and the first soundproof cover 1. Thus, when the first soundproof cover 1 is assembled onto the second soundproof cover 2, the first sealing device 3 can be compressed to further seal the first soundproof cover 1 and the second soundproof cover 2 to prevent water from entering the first soundproof cavity 103 and the second soundproof cavity 201. Moreover, one sealing device can simultaneously seal the second soundproof cover 2 and the cover body 4, and the first soundproof cover 1 and the second soundproof cover 2, thereby simplifying the structural configuration and reducing costs.

[0125] like Fig.13 As shown, the width W1 of the hook portion 304 can be set to 3mm-8mm, the width W2 of the second sealing rib 305 can be set to 1.5mm-3mm, the width W3 of the first sealing rib 302 can be set to 2mm-3.5mm, and the width W3 of the first sealing rib 302 is greater than the width W2 of the second sealing rib 305.

[0126] Specific as Figure 7 As shown, the second sound insulation cover 2 includes a sound insulation cover body 203, and the sound insulation cover body 203 includes a side panel, a bottom plate connected to the bottom of the side panel and a top plate connected to the top of the side panel, the bottom plate extends to the inside of the side panel, and the top plate extends to the outside of the side panel, and the bottom plate and the side panel are arranged to form a second sound insulation cavity 201, the bottom plate is conical in design, and a third water outlet 202 is arranged in the middle of the bottom plate, a thread which is screwed with the first sound insulation cover 1 is arranged on the inside of the side panel, and a groove 2032 is arranged on the outside of the side panel.

[0127] A limiting boss 2031 is formed on the top plate of the second soundproof cover 2, and the hook-back portion 304 of the first sealing device 3 includes: a connecting end, one end of which is connected to the other end of the second connecting portion 303, and the extending direction of the connecting end is perpendicular to the extending direction of the second connecting portion 303; a hook-back end, which is connected to the other end of the connecting end, and the extending direction of the hook-back end is parallel to the extending direction of the second connecting portion 303, and the hook-back end is mounted on the limiting boss 2031. By providing the limiting boss 2031 on the second soundproof cover 2, it is convenient to assemble the hook-back portion 304 of the first sealing device 3, thereby achieving the sealing effect between the first soundproof cover 1 and the second soundproof cover 2. As a convertible embodiment, it is also possible that the limiting boss 2031 is not provided on the second soundproof cover 2, and the hook-back end is directly mounted on the top plate, and is located between the second soundproof cover 2 and the first soundproof cover 1 during assembly.

[0128] like Figure 1 and Figure 2As shown, the first soundproof cover 1 in this embodiment includes: a first cover body 101 and a soundproof seat 102, the first cover body 101 is connected to the top of the soundproof seat 102, the first cover body 101 and the soundproof seat 102 are arranged to form a first soundproof cavity 103, the first cover body 101 is provided with a second flow guide structure 1011, and the soundproof seat 102 is provided with a first flow guide structure 1021. A third connecting portion 1024 for screwing and connecting with the second soundproof cover 2 is provided below the soundproof seat 102.

[0129] The first sealing device 3 achieves a double sealing effect by setting sealing ribs and a barb structure, thereby ensuring the sealing between the cover body 4 and the sound insulation cover assembly and improving the sealing reliability; at the same time, the barb structure of the first sealing device 3 enables the first sealing device 3 to be tightly clamped and fixed between the first sound insulation cover 1 and the second sound insulation cover 2, thereby preventing the first sealing device 3 from falling off and avoiding the problem of overflow of liquid or steam and water backflowing into the cup body due to poor sealing.

[0130] The first cover 101 is detachably connected to the soundproof seat 102. Specifically, the inner side of the first cover 101 is provided with a thread, and the outer side of the soundproof seat 102 is provided with a thread, and the first cover 101 and the soundproof seat 102 are connected together by screwing. As a convertible embodiment, the first cover 101 and the soundproof seat 102 can also be integrally formed.

[0131] According to an embodiment of the present invention, on the other hand, a food processor is provided, including: the above-mentioned cover assembly.

[0132] A first sealing device 3 is provided in the food processor, and its function is to absorb steam and water droplets during the operation of the food processor. When the first sealing device 3 is installed at the corresponding position of the sound insulation cover assembly, the sound insulation cover assembly and the cover body 4 are installed in place, and the corresponding food ingredients are added into the food processor, the power plug can be plugged in to turn on the power, and the food processor can work normally; when the first sealing device 3 is not installed in place, the food processor cannot work normally, and air leakage and water droplets will occur.

[0133] The setting of the reflux structure 104 of the food processor can control the emission of steam. Under the premise of ensuring safety, it makes it difficult for heat to be lost in the enclosed space, the internal temperature rises quickly, and the stewing of ingredients is faster, saving electricity and time.

[0134] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A sound insulation cover assembly, characterized in that: include: A first sound insulation cover (1) suitable for being connected to a cover body of a household appliance; The first sound insulation cover (1) comprises a first sound insulation cavity (103), wherein at least one first flow guiding structure (1021) and at least one second flow guiding structure (1011) are arranged in the first sound insulation cavity (103); The first flow guiding structure (1021) is arranged at one end of the first sound insulation cavity (103) close to the cover of the household appliance, and the first flow guiding structure (1021) is provided with a first through hole (10211), one end of the first through hole (10211) is connected to the first sound insulation cavity (103), and the other end is connected to the noise source of the household appliance; The second flow guiding structure (1011) is arranged at one end of the first sound insulation cavity (103) away from the cover of the household appliance, and the second flow guiding structure (1011) is provided with a second through hole (10111), and the second through hole (10111) is respectively connected to the first sound insulation cavity (103) and the outside.

2. The sound insulation cover assembly according to claim 1, characterized in that: The first flow guiding structure (1021) and the second flow guiding structure (1011) are arranged opposite to each other and staggered.

3. The sound insulation cover assembly according to claim 2, characterized in that: The extension direction of the first sound insulation cavity (103) from the side close to the cover body of the household appliance to the side away from the cover body of the household appliance is the height direction. In the height direction, the average height of the first sound insulation cavity (103) is L, then the height of the first flow guide structure (1021) is L / 2, and the height of the second flow guide structure (1011) is L / 4.

4. The sound insulation cover assembly according to claim 2, characterized in that: The end of the first flow-guiding structure (1021) away from the cover of the household appliance is higher than the end of the second flow-guiding structure (1011) close to the cover of the household appliance.

5. The sound insulation cover assembly according to claim 2, characterized in that: The first sound insulation cavity (103) extends in a height direction from a side close to the cover of the household appliance to a side away from the cover of the household appliance. In a width direction perpendicular to the height direction, the first flow guide structure (1021) and the second flow guide structure (1011) are offset by a width distance A. The radial width of the first flow guide structure (1021) is R1, and the radial width of the second flow guide structure (1011) is R2. Then, A>(R1+R2) / 2.

6. The sound insulation cover assembly according to claim 1, characterized in that: The cross-sectional area of ​​the first through hole (10211) and the second through hole (10111) is not less than 0.000019625 m 2 .

7. The sound insulation cover assembly according to any one of claims 1 to 6, characterized in that: The first soundproofing cavity (103) has a conical design on one side close to the cover of the household appliance, and at least one water outlet is arranged at the bottom of the first soundproofing cavity (103), and the water outlet is connected to the interior of the household appliance.

8. The sound insulation cover assembly according to claim 7, characterized in that: The water outlet is provided with a plurality of holes, including: A first water outlet (1022) is located at the bottom of the first sound insulation cavity (103); A plurality of second water outlet holes (1023) are arranged around the periphery of the first water outlet hole (1022).

9. The sound insulation cover assembly according to claim 8, characterized in that: include: A reflux structure (104), wherein the reflux structure (104) is disposed at the first water outlet (1022), and is adapted to prevent water inside the household appliance from entering the first soundproof cavity (103), and to allow water in the first soundproof cavity (103) to flow back into the interior of the household appliance.

10. The sound insulation cover assembly according to claim 9, characterized in that: The reflux structure (104) comprises: A first connecting portion (1041) is disposed in the first water outlet hole (1022), and an extension height of the first connecting portion (1041) is slightly greater than an extension height of the water outlet hole; A first convex portion (1042), connected to an end of the first connecting portion (1041) away from the interior of the household appliance, and disposed in the first sound insulation cavity (103); the cross-sectional size of the first convex portion (1042) is slightly larger than the first water outlet hole (1022); The second convex portion (1043) is connected to the other end of the first connecting portion (1041) and is disposed outside the first sound insulation cavity (103). The cross-sectional dimensions of the second convex portion (1043) are sufficient to cover all water outlet holes.

11. The sound insulation cover assembly according to any one of claims 1 to 6, characterized in that: include: At least one second soundproof cover (2) is connected to the first soundproof cover (1), and the second soundproof cover (2) is provided with at least one second soundproof cavity (201), and the second soundproof cavity (201) is respectively connected to the interior of the household appliance and the first soundproof cavity (103).

12. The sound insulation cover assembly according to claim 11, characterized in that: The second soundproofing cavity (201) has a conical design on one side close to the cover of the household appliance, and at least one third water outlet (202) is provided at the bottom of the second soundproofing cavity (201), and the third water outlet (202) is connected to the interior of the household appliance.

13. The sound insulation cover assembly according to claim 12, characterized in that: The third water outlet hole (202) and the first flow guiding structure (1021) are arranged in a staggered manner.

14. The sound insulation cover assembly according to claim 11, characterized in that: The first sound insulation cover (1) and the second sound insulation cover (2) are detachably connected.

15. The sound insulation cover assembly according to claim 11, characterized in that: The volumes of the first sound insulation cavity (103) and the second sound insulation cavity (201) are different.

16. The sound insulation cover assembly according to claim 15, characterized in that: The volume of the first sound insulation cavity (103) is greater than the volume of the second sound insulation cavity (201).

17. The sound insulation cover assembly according to claim 11, characterized in that: The inner wall of the first sound insulation cavity (103) and / or the second sound insulation cavity (201) is provided with a plurality of ribs.

18. The sound insulation cover assembly according to claim 17, characterized in that: The ribs are of irregular shape.

19. The sound insulation cover assembly according to any one of claims 1 to 6, characterized in that: The household appliance is a food processor.

20. A cover assembly, characterized in that: include: A cover body (4), wherein the cover body (4) is provided with an opening (401); The sound insulation cover assembly according to any one of claims 1 to 19, wherein the sound insulation cover assembly is arranged at the opening (401).

21. The cover assembly according to claim 20, characterized in that: The sound insulation cover assembly is connected to the opening (401) by interference fit.

22. A food processor, characterized in that: include: A cover assembly as claimed in any one of claims 20 to 21.

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