Noise reduction base and food processor including the same

Abstract

The present invention discloses a noise reduction base and a food processor including the noise reduction base. The noise reduction base includes: a shell, provided with a mounting cavity for accommodating a motor assembly of the food processor; a first air cover, provided in the shell to separate the shell from top to bottom into a soundproof cavity and a first air cavity; the soundproof cavity is arranged around the mounting cavity; the first air cavity is provided with a first air inlet and a first air outlet connected to the outside; the mounting cavity is provided with a second air inlet and a second air outlet; the second air inlet is connected to the soundproof cavity, and the second air outlet is connected to the first air outlet; the first air cover is provided with ventilation holes, and the ventilation holes are connected to the first air inlet and the soundproof cavity, so that the first air inlet, ventilation holes, soundproof cavity, mounting cavity and first air outlet are connected in sequence to form a serpentine air duct. In this way, the noise transmitted to the soundproof cavity will be blocked by the first air cover and cannot be directly discharged from the first air inlet, and the noise needs to be reflected multiple times in the serpentine air duct and gradually attenuated before it can be discharged from the first air outlet.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a noise reduction base and a food processor comprising the noise reduction base. Background Art

[0002] During the use of food processors such as wall breakers, soy milk machines, food processors and grinders, the motor of the motor assembly rotates at high speed, the load is heavy, the vibration is large, resulting in high noise, which directly affects the user experience; on the other hand, as the food processor is used for a longer time, the motor assembly generates a lot of heat during high-load operation, and the electronic components are prone to failure, resulting in unstable product performance and a short product life. Therefore, the motor assembly needs to be cooled. Most existing food processors use airflow to take away the heat of the motor assembly. In this process, the noise can be directly discharged to the outside through the air inlet and outlet, resulting in a poor user experience. Summary of the Invention

[0003] In order to overcome at least one of the defects described in the above-mentioned prior art, the present invention provides a noise reduction base and a food processor including the noise reduction base, aiming to solve the problem in the prior art that the noise of the food processor that uses airflow to dissipate heat is directly discharged from the air inlet and outlet.

[0004] The technical solution adopted by the present invention to solve the problem is:

[0005] A noise reduction base comprises: a shell provided with an installation cavity, wherein the installation cavity is used to accommodate a motor assembly of a food processor; a first air hood provided in the shell to separate the interior of the shell from top to bottom into a soundproof cavity and a first air cavity; the soundproof cavity is surrounded by the installation cavity; the first air cavity is provided with a first air inlet and a first air outlet communicating with the outside; the installation cavity is provided with a second air inlet and a second air outlet; the second air inlet is connected to the soundproof cavity, and the second air outlet is connected to the first air outlet; the first air hood is provided with ventilation holes, and the ventilation holes are connected to the first air inlet and the soundproof cavity; the first air inlet, the ventilation holes, the soundproof cavity, the installation cavity and the first air outlet are connected in sequence to form a serpentine air duct.

[0006] The present invention provides a noise reduction base, on the one hand, the installation cavity, the sound insulation cavity and the first wind cavity can achieve multiple noise barriers, wherein the noise transmitted to the sound insulation cavity will be blocked by the first wind cover and cannot be directly discharged from the first air inlet of the first wind cavity, thereby greatly improving the noise reduction effect; on the other hand, the air flow passes through the serpentine air duct to take away the heat generated by the motor assembly. The serpentine air duct is arranged in a curved manner, so that the air flow path is extended, which can fully take away the heat generated by the operation of the motor assembly. Moreover, the noise generated by the motor assembly and the noise generated by the air flow are reflected multiple times in the serpentine air duct and gradually attenuated, that is, the noise can be discharged from the first air outlet of the first air cavity only after it is gradually attenuated. In this way, the noise is prevented from being discharged directly from the first air inlet and the first air outlet without being reduced, and at the same time, the heat dissipation effect and the noise reduction effect are improved.

[0007] According to some embodiments of the present invention, a first sound-absorbing member is provided in the sound-isolating cavity.

[0008] According to some embodiments of the present invention, the silencer is disposed around the outer peripheral wall of the installation cavity.

[0009] According to some embodiments of the present invention, the installation cavity and the first air cover are spaced apart in the upper and lower directions so that the first air cavity is located below the installation cavity.

[0010] According to some embodiments of the present invention, the serpentine air duct includes a first serpentine section, the installation cavity includes a bottom wall, the bottom wall and the ventilation hole are spaced apart up and down, the second air inlet is provided on the bottom wall, and the ventilation hole and the second air inlet are staggered, and the bottom wall is used to change the direction of the airflow so that the first air inlet, the ventilation hole, the sound insulation cavity and the second air inlet are connected in sequence to form the first serpentine section.

[0011] According to some embodiments of the present invention, a plurality of ventilation holes are provided, the second air inlet and the plurality of ventilation holes are spaced apart from each other in the upper and lower directions, and the plurality of ventilation holes are arranged around the second air inlet.

[0012] According to some embodiments of the present invention, an air outlet duct is further included. The air outlet duct is arranged between the second air outlet and the first air outlet to connect the second air outlet and the first air outlet, and the air outlet duct is in a volute shape.

[0013] According to some embodiments of the present invention, wind cutting ribs are provided in the air outlet duct.

[0014] According to some embodiments of the present invention, a fan is further included. The fan is arranged in the air outlet duct to send the air flow to the first air outlet. A second silencer is provided between the air outlet duct and the fan.

[0015] In addition, the present invention also provides a food processor, including the noise reduction base as described above, and also including a motor assembly, which is accommodated in the installation cavity; the motor assembly includes a second air hood and a motor, the second air hood is arranged in the installation cavity, the second air hood is provided with a rotating cavity, and the motor is arranged in the rotating cavity.

[0016] According to some embodiments of the present invention, the serpentine air duct includes a second serpentine section; a first air duct is formed between the second air cover and the installation cavity; the second air cover is provided with a second air duct, the air inlet of the second air duct is connected to the first air duct, and the air outlet of the second air duct is connected to the rotating cavity; the first air duct is connected to the second air inlet, and the rotating cavity is connected to the second air outlet; the second air inlet, the first air duct, the second air duct, the rotating cavity and the second air outlet are connected in sequence to form the second serpentine section.

[0017] According to some embodiments of the present invention, a spoiler for changing the direction of airflow is provided between the first air duct and the rotating chamber.

[0018] According to some embodiments of the present invention, a sound insulation shell is further included, which is arranged between the installation cavity and the second wind cover. The sound insulation shell is provided with a third air inlet and a third air outlet, the third air inlet is opposite to the second air inlet, and the third air outlet is opposite to the second air outlet.

[0019] According to some embodiments of the present invention, a cup holder is further included, a first connecting hole is formed inwardly on the outer periphery of the second air cover, and the cup holder is provided with a connecting column, which is inserted into the first connecting hole to fix the cup holder and the second air cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the three-dimensional structure of the noise reduction base according to an embodiment of the present invention;

[0021] Figure 2 Schematic diagram of the top view of the noise reduction base according to an embodiment of the present invention;

[0022] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure in the AA direction;

[0023] Figure 4 This is a structural schematic diagram of a noise reduction base (the first air cavity and the first air cover are not shown) according to an embodiment of the present invention;

[0024] Figure 5 Schematic diagram of the structure of a noise reduction base (the first air cavity is not shown) according to an embodiment of the present invention;

[0025] Figure 6This is a schematic structural diagram of a noise reduction base (the mounting cavity and the sound insulation cavity are not shown) according to an embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the explosion structure of the blending cup according to an embodiment of the present invention;

[0027] Figure 8 FIG. 4 is a schematic cross-sectional view of a food processor according to an embodiment of the present invention.

[0028] The meanings of the reference numerals are as follows:

[0029] 10-housing, 101-installation cavity, 1011-bottom wall, 1012-second air inlet, 1013-second air outlet, 102-soundproof cavity, 103-first air cavity, 1031-first air inlet, 1032-first air outlet, 11-first wind shield, 111-ventilation hole, 12-first silencer, 13-air outlet duct, 131-wind cutting rib, 132-second silencer, 14-motor assembly, 141-motor, 142-second wind shield, 1421-rotation cavity, 1422-second air duct, 1423-first connecting hole, 1424-upper wind cover, 1425-lower wind cover, 1426-first spoiler structure, 15-first air duct, 16-air inlet gap, 17-sound insulation shell, 171-third air inlet, 172-third air outlet, 173-second connecting hole, 18-cup holder, 181-connecting column, 182-second spoiler structure, 19-cup body, 20-knife assembly, 201-knife disc, 202-blade, 21-sealing ring, 22-fan. DETAILED DESCRIPTION

[0030] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0033] See also Figures 1 to 3The present invention discloses a noise reduction base, comprising: a housing 10, provided with a mounting cavity 101, the mounting cavity 101 being used to accommodate a motor assembly 14 of a food processor; a first air cover 11, provided in the housing 10 to separate the interior of the housing 10 from top to bottom into a soundproof cavity 102 and a first air cavity 103; the soundproof cavity 102 is arranged around the mounting cavity 101; the first air cavity 103 is provided with a first air inlet 1031 and a first air outlet 1032 communicating with the outside; the mounting cavity 101 is provided with a first air inlet 1031 and a first air outlet 1032 communicating with the outside; 01 is provided with a second air inlet 1012 and a second air outlet 1013; the second air inlet 1012 is connected to the sound insulation cavity 102, and the second air outlet 1013 is connected to the first air outlet 1032; the first air cover 11 is provided with a ventilation hole 111, and the ventilation hole 111 is connected to the first air inlet 1031 and the sound insulation cavity 102; the first air inlet 1031, the ventilation hole 111, the sound insulation cavity 102, the installation cavity 101 and the first air outlet 1032 are connected in sequence to form a serpentine air duct.

[0034] Specifically, the food processor can be, but is not limited to, a wall breaker, a soy milk maker, a food processor, a grinder, etc.; the first air inlet 1031 is used to absorb air from the external environment, and the first air outlet 1032 is used to discharge the internal airflow to the external environment.

[0035] By adopting the above scheme, on the one hand, the installation cavity 101, the sound insulation cavity 102 and the first air cavity 103 can achieve multiple barriers to noise, wherein the noise transmitted to the sound insulation cavity 102 will be blocked by the first air cover 11 and cannot be directly discharged from the first air inlet 1031 of the first air cavity 103, thereby greatly improving the noise reduction effect; on the other hand, the air flow passes through the serpentine air duct to take away the heat generated by the motor assembly 14. Because the serpentine air duct is arranged in a curved manner, the air flow path is extended, which can fully take away the heat generated by the operation of the motor assembly 14, and the noise generated by the motor assembly 14 and the noise generated by the air flow are reflected multiple times in the serpentine air duct and gradually attenuated, that is, the noise can only be discharged from the first air outlet 1032 of the first air cavity 103 after it is gradually attenuated. In this way, the noise is prevented from being discharged directly from the first air inlet 1031 and the first air outlet 1032 without being reduced, and at the same time the heat dissipation effect and the noise reduction effect are improved.

[0036] like Figure 3 and Figure 4 As shown, further, in this embodiment, a first silencer 12 is provided in the sound insulation cavity 102 to block and absorb the medium and high frequency noise penetrating from the motor assembly 14 .

[0037] Preferably, the first silencer 12 is disposed around the outer wall of the installation cavity 101. The first silencer 12 may be annular, or may be a long strip wound into a ring shape, or may comprise multiple first silencers 12 distributed in an annular shape. Preferably, in this embodiment, the first silencer 12 is completely wrapped around the outer wall of the installation cavity 101 to reduce noise transmission. Of course, in other embodiments, the first silencer 12 may be partially wrapped around the outer wall of the installation cavity 101. This can be selected based on actual production and usage requirements and is not limited here.

[0038] like Figure 3 As shown, further, in this embodiment, the installation cavity 101 and the first wind cover 11 are spaced apart in the upper and lower parts so that the first wind cavity 103 is located below the installation cavity 101. In this way, there is a gap between the installation cavity 101 and the first wind cavity 103, and the noise in the installation cavity 101 will be blocked and absorbed by the sound insulation cavity 102 and the first wind cover 11, and cannot be directly transmitted to the first wind cavity 103, and cannot be directly discharged from the first air inlet 1031 and the first air outlet 1032.

[0039] like Figure 3 、 Figure 5 and Figure 6 As shown, further, in this embodiment, the serpentine air duct includes a first serpentine section, the installation cavity 101 has a bottom wall 1011, the bottom wall 1011 and the ventilation hole 111 are spaced apart up and down, the second air inlet 1012 is provided on the bottom wall 1011, and the ventilation hole 111 and the second air inlet 1012 are staggered, and the bottom wall 1011 is used to change the direction of the airflow so that the first air inlet 1031, the ventilation hole 111, the sound insulation cavity 102 and the second air inlet 1012 are connected in sequence to form the first serpentine section. In this way, the airflow entering the sound insulation cavity 102 from the ventilation hole 111 is disturbed by the bottom wall 1011 and changes its flow direction before flowing into the second air inlet 1012, extending the airflow path. The noise will be reflected multiple times in the first serpentine section and gradually attenuated, thereby improving the noise reduction performance. In addition, the bottom wall 1011 of the installation cavity 101 is used to disturb the airflow to change the airflow direction. There is no need to set other spoilers on the bottom wall 1011, which reduces the number of parts, simplifies the structure, reduces the production cost, and avoids the safety hazards caused by the aging and falling off of the spoilers after long-term use.

[0040] Specifically, the second air outlet 1013 is also provided on the bottom wall 1011 , and the second air inlet 1012 surrounds the second air outlet 1013 .

[0041] Preferably, a plurality of ventilation holes 111 are provided, with the second air inlet 1012 and the plurality of ventilation holes 111 spaced apart vertically, and the plurality of ventilation holes 111 surrounding the second air inlet 1012. Airflow is disturbed by the bottom wall 1011 of the installation cavity 101 before flowing into the second air inlet 1012 of the installation cavity 101. This extends the airflow path between the ventilation holes 111 and the second air inlet 1012, improving noise reduction. Furthermore, the plurality of ventilation holes 111 may have a micro-perforation sound-absorbing effect to further reduce noise. Specifically, the ventilation holes 111 may be, but are not limited to, small round holes, small waist-shaped holes, or small oval holes.

[0042] See also Figure 3 、 Figure 5 and Figure 6 Furthermore, in this embodiment, it also includes an air outlet duct 13 and a fan 22. The air outlet duct 13 is arranged between the second air outlet 1013 and the first air outlet 1032 to connect the second air outlet 1013 and the first air outlet 1032. The fan 22 is arranged in the air outlet duct 13 to send the air flow to the first air outlet 1032. A second silencer 132 is provided between the air outlet duct 13 and the fan 22. The second silencer 132 can effectively absorb the noise transmitted to the air outlet duct 13 and the noise generated by the fan 22, thereby reducing the noise discharged to the outside through the second air outlet 1013.

[0043] Preferably, in this embodiment, the air outlet duct 13 is in the shape of a volute. The volute-shaped air outlet duct 13 can ensure the air outlet volume of the noise reduction base and meet the demand for its size reduction. More importantly, it can also reduce the noise generated by the rotation of the fan 22, the noise of the air flow, and the noise transmitted to the air outlet duct 13; and the volute-shaped air outlet duct 13 effectively extends the contact length with the second silencer 132, that is, a longer second silencer 132 can be used, thereby improving the effect of silencing and noise reduction.

[0044] Preferably, a wind cutting rib 131 is provided in the air outlet duct 13. A number of wind cutting ribs 131 can cut the airflow in the air outlet duct 13 to reduce the whistling sound generated by the friction of the airflow, further improving the noise reduction effect when the airflow is discharged.

[0045] Specifically, the air outlet duct 13 is connected to the first air cover 11 .

[0046] Specifically, the first sound-absorbing member 12 and the second sound-absorbing member 132 can be, but are not limited to, sound insulation films, sound insulation cotton, sound-absorbing panels, sound insulation felt, and the like.

[0047] It should be noted that, in some other embodiments, a silencer or a spoiler may also be provided in the serpentine air duct.

[0048] like Figure 3 、 Figure 7 and Figure 8 As shown, in addition, the present invention also provides a food processor, including the noise reduction base as described above, and also including a motor assembly 14, a knife assembly 20, a cup holder 18 and a cup body 19. The motor assembly 14 is accommodated in the installation cavity 101, and the cup holder 18 is embedded in the installation cavity 101 and is used to connect to the cup body 19, wherein the cup body 19 and the cup holder 18 are threadedly connected. One end of the knife assembly 20 is located in the cup body 19. Driven by the motor assembly 14, the knife assembly 20 cuts and stirs the food placed in the cup body 19; the food processor has excellent noise reduction performance and heat dissipation performance, which improves the user experience. Specifically, the motor assembly 14 includes a second air hood 142 and a motor 141. The second air hood 142 is arranged in the installation cavity 101. The second air hood 142 is provided with a rotating chamber 1421. The motor 141 is arranged in the rotating chamber 1421. The arrangement of the second air hood 142 and the rotating chamber 1421 facilitates the formation of a serpentine air duct.

[0049] Further, in this embodiment, the serpentine air duct includes a second serpentine section; a first air duct 15 is formed between the second air cover 142 and the installation cavity 101; the second air cover 142 is provided with a second air duct 1422, the air inlet of the second air duct 1422 is connected to the first air duct 15, and the air outlet of the second air duct 1422 is connected to the rotating cavity 1421; the first air duct 15 is connected to the second air inlet 1012, and the rotating cavity 1421 is connected to the second air outlet 1013; the second air inlet 1012, the first air duct 15, the second air duct 1422, the rotating cavity 1421 and the second air outlet 1013 are connected in sequence to form a second serpentine section. Similarly, the noise generated by the operation of the motor 141 and the noise generated by the airflow will be reflected multiple times in the second serpentine section and gradually attenuated, thereby improving the noise reduction performance. In addition, the second serpentine section is arranged in a bent shape, so that a streamlined airflow form can appear in the second serpentine section, and the flow is smoother, avoiding the situation where the airflow directly blows the motor 141 to produce wind whistling and cause high noise, thereby achieving noise reduction and sound reduction.

[0050] See also Figure 7 and Figure 8 Furthermore, in this embodiment, a sound insulation shell 17 is further included. The sound insulation shell 17 is arranged between the installation cavity 101 and the second wind cover 142. Specifically, the sound insulation shell 17 is embedded in the installation cavity 101, and the second wind cover 142 is arranged in the sound insulation shell 17. The sound insulation shell 17 is provided with a third air inlet 171 and a third air outlet 172. The third air inlet 171 and the second air inlet 1012 are opposite to and connected to each other, and the third air outlet 172 and the second air outlet 1013 are opposite to and connected to each other. In this way, the sound insulation shell 17 forms an enclosure for the installation cavity 101, and the sound insulation shell 17 is used to strengthen the barrier to noise transmitted from the installation cavity 101.

[0051] Furthermore, in this embodiment, a spoiler for changing the direction of the airflow is provided between the first air duct 15 and the rotating chamber 1421, so that the airflow path is more tortuous, the length of the airflow path is increased, and the noise reduction effect is higher.

[0052] like Figure 8 As shown, preferably, the spoiler includes a first spoiler structure 1426 and a second spoiler structure 182; the first spoiler structure 1426 is arranged on one side of the air inlet of the second air duct 1422 and is opposite to the third air inlet 171, and an air inlet gap 16 is formed between the second spoiler structure 182 and the air inlet of the second air duct 1422. The first spoiler structure 1426 disturbs the airflow flowing out of the third air inlet 171, so that the airflow is bent in turn and flows into the air inlet gap 16 and the air inlet of the second air duct 1422; the second spoiler structure 182 is arranged between the air outlet of the second air duct 1422 and the rotating chamber 1421, so that the airflow path between the air outlet of the second air duct 1422 and the rotating chamber 1421 is more tortuous.

[0053] like Figure 7 As shown, specifically, the second wind cover 142 includes an upper wind cover 1424 and a lower wind cover 1425 connected to the upper wind cover 1424. The upper wind cover 1424 and the lower wind cover 1425 can be connected by a snap-fit ​​structure or a threaded connection or integrally formed, etc., but are not limited to this.

[0054] See also Figure 7 and Figure 8 Specifically, the first spoiler structure 1426 is a conical surface structure arranged on the lower wind shield 1425, and the cross-sectional area of ​​the conical surface structure gradually decreases in the direction approaching the third air inlet 171. The airflow flows along the conical surface structure arranged in the above direction, so that the turning of the airflow is smooth and not rapid, the flow direction is more streamlined, and the wind noise is reduced.

[0055] See also Figure 7 and Figure 8 Specifically, the second spoiler structure 182 is an annular protrusion set on the upper wind cover 1424. When the air flow passes through the outlet of the second air duct 1422, it encounters the disturbance of the annular protrusion and changes the wind direction. The air flow is reflected to reduce the noise and then enters the rotating cavity 1421 to take away the heat generated by the motor 141.

[0056] Specifically, the annular protrusion is integrally formed with the cup holder 18 , and the cup holder 18 is embedded in the second air cover 142 through the annular protrusion, reducing the gap between the second air cover 142 and the cup holder 18 , thereby reducing noise leaking from the gap to the external environment.

[0057] It should be noted that the first spoiler structure 1426 and the second spoiler structure 182 may also be, but are not limited to, fin structures, inclined structures, or spoiler structures, etc., as long as they can change the direction of the airflow, and are not limited here.

[0058] It should be noted that, in some other embodiments, the sound insulation shell 17 may not be provided. In this case, the first spoiler structure 1426 is opposite to the second air inlet 1012 .

[0059] like Figure 7 As shown, further, in this embodiment, the cup holder 18 is provided with a connecting column 181, and the outer peripheral edge of the second air cover 142 is concave to form a first connecting hole 1423, and the connecting column 181 is inserted into the first connecting hole 1423 to fix the cup holder 18 and the second air cover 142. In this way, compared with setting the first connecting hole 1423 in the middle of the second air cover 142, the internal gap of the second air cover 142 is reduced, and similarly, the noise leaking from the gap to the external environment can be reduced.

[0060] More specifically, the sound insulation shell 17 is provided with a second connection hole 173 , and the connection column 181 is sequentially inserted into the first connection hole 1423 and the second connection hole 173 to fix the cup holder 18 , the second air cover 142 and the sound insulation shell 17 .

[0061] Specifically, in this embodiment, the knife assembly 20 includes a knife disc 201 and a blade 202. The knife disc 201 is covered at the opening of the installation cavity 101 to prevent noise from leaking from the opening of the installation cavity 101. The knife disc 201 is connected to the motor 141 for transmission. The knife disc 201 rotates under the drive of the motor 141. The blade 202 is connected to the knife disc 201 and rotates synchronously with the knife disc 201 to cut and stir the food in the cup body 19.

[0062] Preferably, a sealing ring 21 is provided at the connection between the cutter disc 201 and the motor 141 . Similarly, the sealing ring 21 can prevent noise from leaking from the connection gap between the cutter disc 201 and the motor 141 .

[0063] In this way, the sound insulation shell 17, the motor assembly 14, the cup holder 18, the cup body 19, and the blade assembly 20 are integrated into a blending cup, and surround the motor 141, reducing the gaps that can directly discharge noise, making it difficult for the noise generated by the motor 141 to spread.

[0064] In summary, the noise reduction base and the food processor including the noise reduction base disclosed in the present invention can at least bring the following beneficial technical effects:

[0065] 1) The mounting cavity 101, the soundproof cavity 102, and the first air cavity 103 can achieve multiple noise barriers. Noise transmitted to the soundproof cavity 102 is blocked by the first air hood 11 and cannot be directly discharged from the first air inlet 1031, thereby greatly improving the noise reduction effect.

[0066] 2) The noise generated by the motor assembly 14 and the noise generated by the air flow are reflected multiple times in the serpentine air duct and gradually attenuated. That is, the noise can only be discharged from the first air outlet 1032 after it is gradually attenuated;

[0067] 3) The first muffler 12 can block and absorb the mid- and high-frequency noise penetrating from the motor assembly 14;

[0068] 4) The bottom wall 1011 of the mounting cavity 101 is used to disturb the airflow to change the airflow direction, eliminating the need to install other spoilers on the bottom wall 1011. This reduces the number of components, simplifies the structure, reduces production costs, and avoids safety hazards caused by aging and falling off of spoilers after long-term use.

[0069] 5) The plurality of ventilation holes 111 may have a micro-perforation sound-absorbing effect to further reduce noise;

[0070] 6) The motor 141 is surrounded to reduce gaps through which noise can be directly discharged, making it difficult for the noise generated by the motor 141 to spread.

[0071] The technical means disclosed in the solutions of the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. Noise reduction base, characterized in that, include: The housing (10) is provided with a mounting cavity (101), wherein the mounting cavity (101) is used to accommodate a motor assembly (14) of the food processor; A first air cover (11) is provided in the housing (10) to separate the interior of the housing (10) from top to bottom into a soundproof chamber (102) and a first air chamber (103); the soundproof chamber (102) is arranged around the installation chamber (101); the first air chamber (103) is provided with a first air inlet (1031) and a first air outlet (1032) communicating with the outside; The installation cavity (101) is provided with a second air inlet (1012) and a second air outlet (1013); the second air inlet (1012) is connected to the sound insulation cavity (102), and the second air outlet (1013) is connected to the first air outlet (1032); The first air hood (11) is provided with a ventilation hole (111), and the ventilation hole (111) is connected to the first air inlet (1031) and the sound insulation cavity (102); the first air inlet (1031), the ventilation hole (111), the sound insulation cavity (102), the installation cavity (101) and the first air outlet (1032) are connected in sequence to form a serpentine air duct.

2. The noise reduction base according to claim 1, characterized in that: A first sound-absorbing component (12) is provided in the sound-isolating cavity (102).

3. The noise reduction base according to claim 2, characterized in that: The first silencer (12) is arranged around the outer peripheral wall of the installation cavity (101).

4. The noise reduction base according to claim 1, characterized in that: The installation cavity (101) and the first wind cover (11) are arranged with a vertical spacing, so that the first wind cavity (103) is located below the installation cavity (101).

5. The noise reduction base according to claim 4, characterized in that: The serpentine air duct comprises a first serpentine section, the installation cavity (101) comprises a bottom wall (1011), the bottom wall (1011) and the ventilation hole (111) are arranged at intervals up and down, and the second air inlet (1012) is arranged on the bottom wall (1011); the ventilation hole (111) and the second air inlet (1012) are staggered, and the bottom wall (1011) is used to change the direction of the airflow so that the first air inlet (1031), the ventilation hole (111), the sound insulation cavity (102) and the second air inlet (1012) are connected in sequence to form the first serpentine section.

6. The noise reduction base according to claim 5, characterized in that: There are a plurality of ventilation holes (111), the second air inlet (1012) and the plurality of ventilation holes (111) are arranged at intervals up and down, and the plurality of ventilation holes (111) are arranged around the second air inlet (1012).

7. The noise reduction base according to any one of claims 1 to 6, characterized in that: It also includes an air outlet duct (13), the air outlet duct (13) communicating with the second air outlet (1013) and the first air outlet (1032), and the air outlet duct (13) is in a volute shape.

8. The noise reduction base according to claim 7, characterized in that: Wind cutting ribs (131) are provided in the air outlet duct (13).

9. The noise reduction base according to claim 7, characterized in that: The invention also includes a fan (22), wherein the fan (22) is arranged in the air outlet duct (13) to send the air flow to the first air outlet (1032), and a second silencer (132) is provided between the air outlet duct (13) and the fan (22).

10. A food processor, characterized in that The noise reduction base comprises the noise reduction base according to any one of claims 1 to 9, and further comprises a motor assembly (14), wherein the motor assembly (14) is accommodated in the installation cavity (101); the motor assembly (14) comprises a second wind hood (142) and a motor (141), wherein the second wind hood (142) is arranged in the installation cavity (101), and the second wind hood (142) is provided with a rotating cavity (1421), and the motor (141) is arranged in the rotating cavity (1421).

11. The food processor according to claim 10, wherein: The serpentine air duct includes a second serpentine section; A first air duct (15) is formed between the second air cover (142) and the installation cavity (101); The second air hood (142) is provided with a second air duct (1422), the air inlet of the second air duct (1422) is communicated with the first air duct (15), and the air outlet of the second air duct (1422) is communicated with the rotating chamber (1421); The first air duct (15) is connected to the second air inlet (1012), and the rotating chamber (1421) is connected to the second air outlet (1013); The second air inlet (1012), the first air duct (15), the second air duct (1422), the rotating chamber (1421) and the second air outlet (1013) are connected in sequence to form the second serpentine section.

12. The food processor according to claim 11, wherein A flow spoiler for changing the direction of airflow is provided between the first air duct (15) and the rotating chamber (1421).

13. The food processor according to any one of claims 10 to 12, characterized in that: The invention also includes a sound insulation shell (17), wherein the sound insulation shell (17) is arranged between the installation cavity (101) and the second wind cover (142), and the sound insulation shell (17) is provided with a third air inlet (171) and a third air outlet (172), wherein the third air inlet (171) and the second air inlet (1012) are opposite to each other, and the third air outlet (172) and the second air outlet (1013) are opposite to each other.

14. The food processor according to any one of claims 10 to 12, characterized in that: The invention also includes a cup holder (18), wherein the outer periphery of the second air cover (142) is concavely formed with a first connecting hole (1423), and the cup holder (18) is provided with a connecting column (181), and the connecting column (181) is inserted into the first connecting hole (1423) to fix the cup holder (18) and the second air cover (142).

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