CN217696266U - Cooking machine and noise reduction air duct structure thereof - Google Patents

Abstract

The application provides cooking machine's wind channel structure and cooking machine of making an uproar falls. The noise reduction air duct structure comprises a base and an air baffle. The base comprises a base body part and a lower isolation part connected with the base body part, the base body part comprises a middle part and an edge part which are connected, the edge part is provided with an air inlet, the middle part is provided with a through hole which is communicated up and down, and the lower isolation part protrudes downwards from the middle part and surrounds the through hole. The deep bead include the base plate and connect in the extension board of base plate, the base plate with the isolation part encloses into the air duct jointly down, the edge part is equipped with the opening, down the isolation part be equipped with air duct intercommunication just corresponds the intercommunication mouth of opening, the extension board set up in opening department, include with the just right air exit of intercommunication mouth, the air exit passes through the air duct with the air intake intercommunication. When the air current gets into the exhaust airway, the air current flow in-process velocity of flow reduces, and kinetic energy is weakened, has reduced the air current noise.

Description

Cooking machine and noise reduction air duct structure thereof

Technical Field

The application relates to a small household appliance technical field, particularly, relates to an air duct structure and cooking machine of making an uproar falls of cooking machine.

Background

The high-speed rotation of motor in the cooking machine can produce a large amount of heats, consequently, the inside of cooking machine is equipped with the heat dissipation wind channel usually to realize the heat dissipation of motor. At present, a heat dissipation air duct utilizes heat dissipation fan blades on a motor to guide air, the heat dissipation fan blades rotate at a high speed along with the motor, the higher the rotating speed of the motor is, the larger the air volume is, the larger the noise is, and the larger the heat dissipation airflow noise causes poor user experience.

SUMMERY OF THE UTILITY MODEL

The application provides an air channel structure and cooking machine of making an uproar falls of cooking machine can realize the motor heat dissipation and reduce the air current noise.

The utility model provides a wind channel structure of making an uproar falls of cooking machine, includes:

the base comprises a base body part and a lower isolation part connected with the base body part, the base body part comprises a middle part and an edge part which are connected, the edge part is provided with an air inlet, the middle part is provided with a through hole which is communicated up and down, and the lower isolation part protrudes downwards from the middle part and is arranged around the through hole; and

the deep bead, assemble in the downside of middle part, including the base plate with connect in the extension board of base plate, the base plate with the isolation part encloses into the air duct jointly down, the edge part is equipped with the opening, down the isolation part be equipped with the air duct intercommunication just corresponds the intercommunication mouth of opening, the extension board set up in opening department, include with the just right air duct of intercommunication mouth, the air duct passes through the air duct with the air intake intercommunication. When the air current gets into the exhaust duct, under the water conservancy diversion effect of heat dissipation fan blade, the air current changes the direction, flows to air outlet department along the extending direction of lower isolation portion, and in this flow process, the flow velocity of air current reduces, and kinetic energy is weakened, has reduced the air current noise.

Optionally, the lower isolation portion includes a surrounding portion surrounding the periphery of the through hole, a first isolation section connected to one end of the surrounding portion and extending toward the edge portion, and a second isolation section connected to the other end of the surrounding portion and extending toward the edge portion, a gap is left between the first isolation section and the second isolation section, and the gap forms the communication port. So, the intercommunication mouth is through reserving the clearance formation between first isolation section and second isolation section for lower isolation portion forms open structure in intercommunication mouth department, has reduced the resistance of air current circulation intercommunication mouth.

Optionally, the size of the gap between the first and second isolated segments is greater closer to the gap. Therefore, the exhaust volume of the exhaust outlet can be ensured, and the high-temperature gas in the exhaust outlet can be rapidly exhausted.

Optionally, the maximum size of the gap between the first isolation section and the second isolation section is equal to the size of the air outlet in the direction. Therefore, on one hand, the air exhaust amount can be ensured, the high-temperature gas can be ensured to be smoothly exhausted, the motor is in a better working state, and on the other hand, the air exhaust outlet can be fully utilized to exhaust air with larger circulation.

Optionally, the maximum size of the gap ranges from 58mm to 65mm. The size range can reduce airflow resistance and ensure air exhaust amount.

Optionally, the range of the downward protruding dimension of the lower spacer from the middle portion is 18 to 21mm. The size range can ensure the air exhaust space of the heat dissipation fan blade, avoid the generation of vortex in the space and reduce the airflow noise.

Optionally, the noise reduction air duct structure further includes a water guide structure disposed in an interval between the first isolation section and the second isolation section, and the water guide structure communicates the inside and the outside of the noise reduction air duct structure to supply water for derivation. The water guide structure can prevent a motor or other electronic devices from wading, and short circuit is avoided.

Optionally, the water guide structure is disposed between the first isolation section and the second isolation section at an intermediate position of the interval, the water guide structure includes a wind guide surface facing the wind inlet side, and the wind guide surface extends toward the air outlet. When the air current flows to the air exit, the air current can be led into the air exit through the wind-guiding surface, ensures that the air current is discharged smoothly.

Optionally, the noise reduction air duct structure further comprises an upper isolation portion, the upper isolation portion protrudes upwards from the middle portion and surrounds the through hole, a space surrounded by the upper isolation portion is a motor accommodating space, and the motor accommodating space is communicated with the air inlet. The air current gets into the motor accommodation space, is favorable to realizing the abundant heat transfer of motor and low temperature gas.

Optionally, a gap is left between the edge portion and the lower isolation portion, the noise reduction duct structure further includes a connection structure disposed in the gap, and the substrate is connected to the connection structure. Connection structure sets up in the clearance, can make full use of space, improves the compactness of cooking machine structure.

The utility model provides a food processer, includes the host computer, the host computer include the motor, connect in the heat dissipation fan blade of the pivot of motor to and as above any one the wind channel structure of making an uproar falls, the heat dissipation fan blade assemble in the space that second isolation portion surrounded.

Optionally, the range of the minimum distance between the radially outermost end of the heat dissipation fan blade and the inner wall of the lower isolation part is 3-10 mm; and/or

The range value of the minimum distance between the bottommost end of the heat dissipation fan blade and the inner side bottom surface of the wind shield is 3-10 mm. In the range of the minimum distance A and the minimum distance B, the gap between the heat dissipation fan blade and the lower isolation part is not too small, and when the heat dissipation fan blade rotates, the air flow can be ensured not to generate vortex at the position, and the noise is reduced.

The technical scheme provided by the application can at least achieve the following beneficial effects:

the application provides an air duct structure and cooking machine of making an uproar falls of cooking machine, wherein, the base plate of deep bead encloses into the air duct with lower isolation portion, and the extension board of deep bead is equipped with the air exit, and lower isolation portion is equipped with the intercommunication mouth, and just right with the air exit. In the scheme, when the air flow enters the exhaust duct, the air flow changes direction under the flow guiding effect of the heat dissipation fan blades and flows to the exhaust outlet along the extending direction of the lower isolation part, in the flowing process, the flowing speed of the air flow is reduced, the kinetic energy is weakened, and the air flow noise is reduced.

Drawings

Fig. 1 is a schematic view of a food processor according to an exemplary embodiment of the present application;

fig. 2 is a cross-sectional view of a food processor shown in an exemplary embodiment of the present application;

fig. 3 is an exploded view of a food processor according to an exemplary embodiment of the present application;

FIG. 4 is a schematic view of the base shown in FIG. 3 inverted;

FIG. 5 is a schematic view of the windshield shown in FIG. 3 inverted;

FIG. 6 is a schematic view of the bottom of the base;

FIG. 7 is a cross-sectional view of the base and windshield in an assembled condition;

FIG. 8 is an enlarged view of a sectional view of a part of the structure of the food processor;

fig. 9 is still another cross-sectional view of the food processor shown in fig. 1.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with aspects of the present application.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. As used in this application, the terms "first," "second," and the like, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Similarly, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced item, and are instead denoted individually as if only one of the referenced item is referred to. "plurality" or "a number" means two or more. Unless otherwise specified, "front", "back", "lower" and/or "upper", "top", "bottom", and the like are for ease of description only and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic diagram of a food processor 100 according to an exemplary embodiment of the present application. Fig. 2 is a sectional view of the food processor 100 shown in fig. 1.

The food processor 100 provided by the embodiment of the present application includes a main unit 10 and a cup assembly 20 detachably assembled to the main unit 10. The main machine 10 comprises a motor 11, the cup assembly 20 comprises a stirring blade 21, the upper end of a rotating shaft 110 of the motor 11 is in transmission connection with the stirring blade 21, and the stirring blade 21 is driven to rotate so as to stir and crush food materials.

The host 10 further includes a heat dissipating fan 12 and a noise reduction duct structure 13, wherein the heat dissipating fan 12 is connected to a lower end of a rotating shaft 110 of the motor 11 and rotates together with the rotating shaft 110. The noise reduction air duct structure 13 includes a heat dissipation air duct 130, and the heat dissipation fan blade 12 is disposed in the heat dissipation air duct 130. In the process that the heat dissipation fan blade 12 rotates along with the rotating shaft 110, the external low-temperature airflow enters the heat dissipation air duct 130, flows along the predetermined direction, exchanges heat with the motor 11, and discharges the high-temperature airflow after heat exchange, thereby realizing heat dissipation of the motor 11. Also, the noise reduction duct structure 13 can reduce noise generated when the air flow passes through the heat dissipation duct 130, which will be described in detail below.

Referring to fig. 3 to 5, fig. 3 is an exploded view of the food processor 100 shown in fig. 1. Fig. 4 is a schematic view showing the base 131 shown in fig. 3 upside down. Fig. 5 shows the wind deflector 133 inverted.

The noise reduction duct structure 13 includes a base 131, a large body 132, and a wind shield 133. The base 131 includes a base portion 1310, and upper and lower partitions 1311 and 1312 connected to the base portion 1310. The base portion 1310 includes a middle portion 13100 and an edge portion 13101 connected to each other, the edge portion 13101 is provided with air inlets 13101a, and the number of the air inlets 13101a is not limited and may be one or more. In this embodiment, two air inlets 13101a are provided, and the two air inlets 13101a are disposed at an interval of 180 °. The specific structure of the air inlet 13101a is not limited, and may be a plurality of strip-shaped holes arranged in parallel.

The middle part 13100 is provided with a through hole 13100a penetrating up and down, the upper isolation part 1311 protrudes upwards from the middle part 13100 and is arranged around the periphery of the through hole 13100a, a space surrounded by the upper isolation part 1311 is a motor accommodating space 13110 (refer to fig. 2) for accommodating the motor 11, and the motor 11 is supported and assembled on the upper isolation part 1311. The lower isolation part 1312 protrudes downwards from the middle part 13100 and is arranged around the periphery of the through hole 13100a, and a space surrounded by the lower isolation part 1312 is used for accommodating the heat dissipation fan blade 12. That is, the lower end of the rotating shaft 110 of the motor 11 passes through the through hole 13100a and is connected to the heat dissipating fan 12.

The wind deflector 133 includes a base plate 1331 and an extension plate 1332 connected to the base plate 1331. In one embodiment, the extension plate 1332 extends upward from an edge of the base plate 1331. The substrate 1331 is assembled on the lower side of the middle portion 13100, and is joined to the bottom end of the lower isolation portion 1312 and the edge portion 13101, the substrate 1331 and the lower isolation portion 1312 enclose an exhaust duct 1301, and the heat dissipation fan blade 12 is located in the exhaust duct 1301. The edge part 13101 is further provided with a notch 13101b, the lower isolation part 1312 is provided with a communication port 13124 which is communicated with the exhaust duct 1301 and faces the notch 13101b, the extension plate 1332 is arranged at the notch 13101b and blocks the notch 13101b, the extension plate 1332 is provided with an exhaust port 1330 which faces the communication port 13124, and the exhaust port 1330 is communicated with the air inlet 13101a through the exhaust duct 1301.

The bodice 132 is assembled to the edge portion 13101, and covers the outer side of the upper partition 1311, and a gap is left between the bodice 132 and the upper partition 1311, and the gap forms an air inlet duct 1302 (refer to fig. 2), the air inlet 13101a is communicated with the air inlet duct 1302, and the air inlet duct 1302 is communicated with the exhaust duct 1301.

The heat dissipation air duct 130 includes an air inlet duct 1302, a motor accommodating space 13100, a through hole 13100a, and an air outlet duct 1301, which are sequentially connected, wherein the air inlet 13101a is formed as an inlet through which low-temperature air flows into the heat dissipation air duct 130, and the air outlet 1330 is formed as an outlet through which high-temperature air flows out of the heat dissipation air duct 130. When the heat dissipating fan 12 rotates, the external low-temperature air flow enters from the air inlet 13101a, flows through the heat dissipating air duct 130, and is discharged from the air outlet 1330, so that the circulating heat dissipation of the motor 11 is realized. Moreover, when the airflow enters the exhaust duct 1301, under the guiding action of the heat dissipation fan blade 12, the airflow changes its direction and flows to the exhaust opening 1330 along the extending direction of the lower isolation portion 1312. In the embodiment shown in fig. 5, the base plate 1331 is a flat plate, the extension plate 1332 is a strip-shaped arc plate extending along the outer edge of the base plate 1331, and the exhaust opening 1330 may include a plurality of strip-shaped holes uniformly arranged on the extension plate 1332. Of course, in other embodiments, the specific implementation of the exhaust 1330 may vary.

In one embodiment, the lower isolation portion 1312 includes a surrounding portion 13120 surrounding the periphery of the through hole 13100a, a first isolation section 13121 connected to one end of the surrounding portion 13120, and a second isolation section 13122 connected to the other end of the surrounding portion 13120, with a space 13123 left between the first isolation section 13121 and the second isolation section 13122, and the space 13123 forms the communication port 13124. In this embodiment, the communication port 13124 is formed by providing a gap between the first isolation section 13121 and the second isolation section 13122, so that the lower isolation portion 1312 forms an open structure at the communication port 13124, and the resistance to the flow of air through the communication port 13124 is reduced. The edge portion 13101 is circumferentially disposed around the lower spacer 1312 with a gap 13103 left between the lower spacer 1312. In one embodiment, the noise reduction duct structure 13 further includes a connecting structure 135 disposed in the gap 13103, and the base plate 1331 is connected to the connecting structure 135 to fix the wind deflector 133 to the base 131. The implementation of the connection structure 135 is not limited. In one embodiment, the connecting structure 135 includes a connecting post, and correspondingly, the base plate 1331 is provided with a connecting hole 13310, and the connecting hole 13310 is used for a screw to be screwed into and locked to the connecting post. The connection structure 135 and the connection hole 13310 may be respectively provided in plural numbers, and they are provided in one-to-one correspondence. Connection structure 135 sets up in clearance 13103, can make full use of space, improves the compactness of cooking machine structure.

Referring to fig. 6, fig. 6 is a schematic view of the bottom of the base 131.

In one embodiment, the spacing 13123 between the first and second separator segments 13121, 13122 is greater the closer the size is to the cutout 13101 b. So, can guarantee exhaust outlet 1330 air output, make inside high temperature gas can be discharged fast.

In one embodiment, the maximum dimension C of the space 13123 between the first isolation section 13121 and the second isolation section 13122 is equal to the dimension of the air outlet 1330 in the same direction, so that on one hand, a larger air outlet amount can be ensured, the high-temperature air can be smoothly discharged, and the motor 11 can be in a better working state, and on the other hand, the air outlet 1330 can be fully utilized, so that the air outlet 1330 can discharge air with a larger flow rate. It should be noted that, when the air outlet 1330 adopts a plurality of strip-shaped holes arranged in parallel, the size of the air outlet 1330 is equal to the distance between the strip-shaped holes at the two ends.

In one embodiment, the maximum dimension C of the spacing 13123 ranges in value from 58 to 65mm. The size range can reduce airflow resistance and ensure air exhaust amount. For example, the maximum dimension C may be, but is not limited to, 58mm, 60mm, 62mm, 65mm.

In one embodiment, the noise reduction air duct structure 13 further includes a water guide structure 134 disposed in the space 13123, and the water guide structure 134 connects the inside and the outside of the noise reduction air duct structure 13 for water to be guided out. The water guiding structure 134 may prevent the motor 11 or other electronic devices from being involved in water, and thus from short-circuiting. In one embodiment, the water guide structure 134 protrudes downward from the middle portion 13100 to have a hollow structure, and the hollow forms the water guide hole 1340. The base plate 1331 includes a through hole 1333 through which the water guide structure 134 passes, and the water guide structure 134 is inserted into the through hole 1333 such that the water guide hole 1340 communicates with the outside.

In the embodiment shown in fig. 6, the water guide structure 134 is located at the middle position of the space 13123, and the water guide structure 134 includes a wind guide surface 1342 facing the wind side, and the wind guide surface 1342 extends toward the air outlet 1330 (refer to fig. 4). The wind guide surface 1342 may be an arc convex surface or a plane extending obliquely toward the air outlet 1330. When the air flow flows to the air outlet 1330, the air flow can be guided into the air outlet 1330 through the air guiding surface 1342, ensuring smooth air flow discharge.

In one embodiment, the water guiding structure 134 has a rectangular end at one end and an arc end at the other end, the arc end protrudes toward the air outlet 1330, and the arc convex surface forms the wind guiding surface 1342. In addition, the water guide structure 134 is matched with the through hole 1333 on the substrate 1331, and the positioning of the base 131 and the wind shield 133 can be realized along the circumference of the through hole 13100a, so that the mounting position of the wind shield 133 is more accurate, and the alignment and mounting of the connecting hole 13310 on the substrate 1331 and the connecting structure 135 are facilitated.

Referring to fig. 7, fig. 7 is a sectional view of the wind guard 133 and the base 131 in an assembled state.

In one embodiment, the dimension D of the lower isolator 1312 that protrudes downward from the middle section 13100 ranges in value from 18 to 21mm. For example, the dimension D may be 18mm, 19mm, 20mm, 21mm. The size range can ensure the air exhaust space of the heat dissipation fan blade 12, avoid the generation of vortex in the space and reduce the airflow noise.

Referring to fig. 8, fig. 8 is an enlarged view of a cross-sectional view of a part of the structure of the food processor 100.

As is known in the art, the heat dissipation fan 12 is assembled in the space surrounded by the lower isolation portion 1312 and the substrate 1331, i.e., the exhaust duct 1301. In one embodiment, the minimum distance a between the radially outermost end of the heat dissipation fan blade 12 and the inner wall of the lower partition 1312 is in a range of 3-10 mm. In one embodiment, the minimum distance B between the bottom end of the heat dissipation fan blade 12 and the inner bottom surface of the wind shield 133 is 3-10 mm. In the range of the minimum distance a and the minimum distance B, the gap between the heat dissipation fan blade 12 and the lower isolation portion 1312 is not too small, and when the heat dissipation fan blade 12 rotates, the airflow is ensured not to generate a vortex at the position, so as to reduce noise.

Referring to fig. 2 and 9, fig. 9 is another cross-sectional view of the food processor 100 shown in fig. 1.

When the food processor 100 works, the motor 11 is started, the heat dissipation fan blades 12 rotate under the driving force of the motor 11, low-temperature gas enters the air inlet duct 1302 from the air inlet 13101a, enters the space where the motor accommodating space 13110 is located from the upper end of the upper partition 1311, and exchanges heat with the motor 11, at this time, the low-temperature gas absorbs heat to form high-temperature gas, and the high-temperature gas enters the exhaust duct 1301 through the through holes 13100a and is then exhausted through the exhaust outlet 1330. The arrows in the drawing indicate the flow direction of the air flow.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims (10)

1. The utility model provides a wind channel structure of making an uproar falls of cooking machine which characterized in that includes:

a base (131) including a base portion (1310) and a lower isolation portion (1312) connected to the base portion (1310), wherein the base portion (1310) includes a middle portion (13100) and an edge portion (13101) connected to each other, the edge portion (13101) is provided with an air inlet (13101 a), the middle portion (13100) is provided with a through hole (13100 a) penetrating up and down, and the lower isolation portion (1312) protrudes downward from the middle portion (13100) and is disposed around the through hole (13100 a); and

the wind shield (133) is assembled on the lower side of the middle portion (13100) and comprises a base plate (1331) and an extension plate (1332) connected to the base plate (1331), the base plate (1331) and the lower isolation portion (1312) jointly enclose an exhaust duct (1301), the edge portion (13101) is provided with a notch (13101 b), the lower isolation portion (1312) is provided with a communication port (13124) communicated with the exhaust duct (1301) and corresponding to the notch (13101 b), the extension plate (1332) is arranged at the notch (13101 b) and comprises an exhaust port (1330) opposite to the communication port, and the exhaust port (1330) is communicated with the air inlet (13101 a) through the exhaust duct (1301).

2. The noise reduction duct structure according to claim 1, wherein the lower partition (1312) includes a surrounding portion (13120) that surrounds a periphery of the through hole (13100 a), a first partition section (13121) that is connected to one end of the surrounding portion (13120) and extends toward the edge portion (13101), and a second partition section (13122) that is connected to the other end of the surrounding portion (13120) and extends toward the edge portion (13101), a space (13123) being left between the first partition section (13121) and the second partition section (13122), the space (13123) forming the communication port (13124).

3. A noise reducing wind tunnel structure according to claim 2, characterized in that the space (13123) between the first and second partition segments (13121, 13122) is dimensioned larger closer to the gap (13101 b).

4. A noise reducing wind tunnel structure according to claim 3, characterized in that the maximum size of the space (13123) between the first partition section (13121) and the second partition section (13122) is equal to the size of the wind discharge opening in this direction.

5. A noise-reducing air duct structure according to claim 4, characterized in that the maximum dimension of the space (13123) ranges from 58 to 65mm.

6. The noise reducing wind tunnel structure according to claim 2, characterized in that the noise reducing wind tunnel structure (13) further comprises a water guiding structure (134) disposed in the space (13123) between the first and second partition sections (13121, 13122), the water guiding structure (134) communicating the interior and exterior of the noise reducing wind tunnel structure (13) for water to be led out.

7. The noise reduction wind tunnel structure according to claim 6, characterized in that the water guide structure (134) is provided at an intermediate position of the interval (13123) between the first and second partition sections (13121, 13122), the water guide structure (134) comprising a wind guide surface (1342) facing a wind incoming side, the wind guide surface (1342) extending towards the air outlet (1330).

8. A noise-reducing air duct structure according to claim 1, wherein the noise-reducing air duct structure (13) further comprises an upper partition (1311), the upper partition (1311) protrudes upward from the middle portion (13100) and surrounds the through hole (13100 a), a space surrounded by the upper partition (1311) is a motor accommodating space (13110), and the motor accommodating space (13110) is communicated with the air inlet (13101 a); and/or

A gap (13103) is reserved between the edge part (13101) and the lower isolation part (1312), the noise reduction air duct structure (13) further comprises a connecting structure (135) arranged in the gap (13103), and the substrate (1331) is connected to the connecting structure (135); and/or

The lower partition (1312) has a size protruding downward from the intermediate portion (13100) in a range of 18 to 21mm.

9. A food processor, comprising a main machine (10), wherein the main machine (10) comprises a motor (11), a heat dissipating fan (12) connected to a rotating shaft (110) of the motor (11), and a noise reduction air duct structure (13) according to any one of claims 1 to 8, wherein the heat dissipating fan (12) is assembled in a space surrounded by the lower partition (1312).

10. The food processor of claim 9, wherein the minimum distance between the radial outermost end of the heat-dissipating fan blade (12) and the inner wall of the lower partition (1312) is 3-10 mm; and/or

The range value of the minimum distance between the bottommost end of the heat dissipation fan blade (12) and the inner side bottom surface of the wind shield (133) is 3-10 mm.

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