TWI702025B - Air extraction conditioning device - Google Patents

Abstract

An air extraction and conditioning device, comprising a body unit, a cup body arranged on the body unit, a cup lid that can be opened and covered on the cup body, an air extraction group connected to the body unit, and a body unit connected to the body unit. The air extraction group can be detachably arranged on the air extraction valve of the cup cover, and a check unit. The cup cover surrounds and defines a cup cover space, and a through hole group is formed. The air extraction group can extract air to the cup cover space through the air extraction valve. The air extraction valve can be configured to abut the lid and cooperate with the air extraction group to close the lid space of the lid, deform and transform to a lid that cooperates with the lid to define a communication between the lid space and the outside world The connected state of the gap. The non-return unit can supply gas to flow unidirectionally from the cup inner space to the cup cover space through the through hole group. The invention has the advantages of easy production and fewer parts.

Description

Air extraction conditioning device

The present invention relates to a household appliance for cooking food or ingredients, in particular to an air extraction conditioning device suitable for cooking vegetables or fruits.

Referring to Figures 1 and 2, CN105682517 Patent Case No. CN105682517 discloses an existing air extraction and conditioning device 1, which is suitable for shredding or stirring ingredients or food, and includes a body unit 11 and a body unit 11 arranged on the body unit 11. And defines a cup body 12 that defines a cup inner space 121, a cup cover 13 that is arranged on the cup body 12 and defines a cup cover space 131 spaced apart from the cup inner space 121, and a cup cover 13 assembled in the body unit 11 And the air extraction unit 14 is arranged on the lid 13 and a check unit 15 is inserted on the lid 13 and can supply gas unidirectionally from the inner space 121 to the lid space 131 .

The air extraction unit 14 includes an air extraction arm 141 capable of extracting air, an air extraction valve 142 assembled with the air extraction arm 141 and covered on the cup cover 13, and an air extraction valve 142 that penetrates and covers the air extraction arm 141. The pressure relief valve 143 on the arm 141.

The suction arm 141 defines a suction passage 143 that penetrates up and down and opens to the left of the figure. The pressure relief valve 143 is provided on the top of the suction channel 144 so that the top of the suction channel 144 can communicate with the outside.

The existing air extraction conditioning device 1 can penetrate the air extraction unit 14 through the air extraction channel 144-the cup cover space 131-the non-reversal unit 15 to extract the gas in the cup inner space 121 to avoid food or food In the conditioning process, it is oxidized by contact with oxygen. When the cup body 12 is to be removed after the conditioning is completed, the air is taken in by opening the pressure relief valve 143 at the top of the air extraction channel 143, so that the pressure in the air extraction channel 143 and the cup cover space 131 is equal to the outside Balance to facilitate the separation of the suction unit 14 and the cup cover 13.

Although this type of existing air extraction conditioning device has the effect of preventing the oxidation of food materials or food, and can also separate the air extraction unit 14 from the cup cover 13 after air extraction, it uses more valve bodies, except for production , In addition to more troublesome manufacturing, more parts are also accompanied by an increase in the failure rate and replacement cost of consumables, which needs to be further improved.

The purpose of the present invention is to provide a suction conditioning device that can overcome at least one of the disadvantages of the prior art.

The air extraction conditioning device includes a body unit, a cup group unit, an air extraction unit, and a non-reverse unit.

The cup group unit includes a cup body arranged on the body unit and defining an inner space of a cup, and a cup lid capable of being opened on the cup body and covering the inner space of the cup. The cup cover surrounds and defines a cup cover space spaced apart from the cup inner space, and a through hole group communicating between the cup inner space and the cup cover space and capable of supplying gas flow is formed. The air extraction unit includes an air extraction group connected to the body unit, and an air extraction valve inserted into the air extraction group and detachably covered on the cup lid. The air extraction group can extract air to the cup cover space through the air extraction valve. The air extraction valve can be configured to abut the lid and cooperate with the air extraction group to close the lid space of the lid, deform and transform to a lid that cooperates with the lid to define a communication between the lid space and the outside world The connected state of the gap. The non-return unit is assembled in the cup cover and shields the through hole group to block the communication between the space in the cup and the cover space, and can be in a shielding state that shields the through hole group when the air extraction unit is pumping air The deformation is converted to a deformed state for the through hole group to communicate the cup inner space and the cup cover space.

The effect of the air extraction conditioning device is: the design of the air extraction valve that can be deformed to generate the gap allows the cup cover space to directly communicate with the outside world without a special pressure relief valve, so the invention has easy manufacturing and failure rate And the advantages of low parts consumption rate.

Referring to Figures 3 to 6, an embodiment of the air extraction conditioning device of the present invention includes a body unit 2, a cup unit 3 arranged on the body unit 2, and a combination of the body unit 2 and the cup unit 3 The air extraction unit 4, and a non-return unit 5 and a protection unit 6 assembled on the cup unit 3.

The body unit 2 includes a casing 21 in the shape of a truncated cone, a grip 22 extending upward from the rear end of the casing 21, and a drive module 23 and a power module 24 arranged in the casing 21 . Since the design of the casing 21, the handle 22, the drive module 23, and the power module 24 are common knowledge and not the focus of this creation, no further description is given here.

The cup group unit 3 includes a cup body 31 arranged at the top of the casing 21 and surrounding and defining an inner space 311 of a cup, a cup cover 32 that can be opened and arranged on the cup body 31, and a cup body 31 sleeved on the cup cover 32 for the cup cover 32 to cover the cup body 31 with a gasket 33 airtightly, and a conditioning group 34 assembled in the cup body 31 and capable of being driven by the driving module 23.

The cup cover 32 is substantially circular, covers the top of the cup inner space 311, and includes an outer ring wall 321 that abuts against the top edge of the cup body 31, and an outer ring wall 321 extending downward from the inner edge of the outer ring wall 321 The inner ring wall 322, a cover wall 323 extending horizontally connected to the bottom edge of the inner ring wall 322, an inner surrounding wall 324 and a peripheral wall 325 extending downward from the cover wall 323 and spaced inside and outside, and a The outer ring wall 321 extends downward and is provided with a surrounding wall 326 for the gasket 33 to be sleeved.

The inner ring wall 322 cooperates with the cover wall 323 to define a cup cover space 35 with an opening facing upward and substantially in a block shape. The cup cover space 35 is separated from the cup inner space 311.

The cover wall 323 is substantially circular, and a through hole group 36 for gas flow is formed in the center. The through hole group 36 includes a first through hole 361 that is substantially circular and penetrates up and down, and a plurality of second through holes 362 that surround the first through hole 361 and that penetrate up and down. The aperture of each of the second through holes 362 is smaller than the aperture of the first through hole 361, and the second through holes 362 are spaced from the first through hole 361 and communicate with the cup through the protection unit 6内空间311. The actual communication manner between the second through holes 362 and the inner space 311 of the cup will be described later. In other embodiments of the present invention, the through hole group 36 can also include only one of the second through holes 362. This embodiment provides an embodiment with a larger ventilation volume.

The inner wall 324 has an annular cross section, surrounds the through hole group 36 and protrudes downward from the outer wall 325. The peripheral wall 325 surrounds the inner peripheral wall 324 at intervals, and the outer surface is formed with threads.

The conditioning group 34 is a cutting blade group in the first embodiment, but in other embodiments of the present invention, it can also be a grinding blade group or a stirring rod group and other conditioning tools.

The air extraction unit 4 can be detachably covered on the lid 32 to close the lid space 35, and can draw air to the lid space 35, and includes an air extraction group 41 pivotally connected to the body unit 2, and Plug the air extraction group 41 and detachably cover the cup cover 32 and cooperate with the air extraction group 41 to close the air extraction valve 42 of the cup cover space 35, a part of which is located in the air extraction group 41 and Partially protrude the pressing member 43 of the air extraction group 41, an air extraction module 44 provided in the casing 21, and an air extraction module 44 provided in the air extraction group 41 and in gas communication with the air extraction module 44 Trachea 45.

The air extraction group 41 extends back and forth, and the rear end is pivotally connected to the top end of the grip 22 of the body unit 2, and includes an upper arm body 411 and a lower arm body 412 that are substantially L-shaped in cooperation, and an upper arm body 412 that extends up and down. The air extraction column 413 of the lower arm body 412 and an air nozzle 414 extending backward from the air extraction column 413 protrude downward. The upper arm body 411 cooperates with the lower arm body 412 to define an arm inner space 415. The bottom end of the air extraction column 413 is inserted into the air extraction valve 42. The air nozzle 414 allows one end of the suction pipe 45 to be sheathed, and cooperates with the suction column 413 to define an L-shaped suction channel 416.

The air extraction valve 42 includes a valve wall 421 that is flexible and abuts the cup cover 32 and covers the cup cover space 35 and is annular, and a valve wall 421 that extends upward from the inner edge of the valve wall 421 and is in the shape of a hollow cylinder. The columnar wall 422, which can be inserted into the suction column 413, has an arc-shaped cross section and extends upward from one side of the valve wall 421 and protrudes into the extension wall 423 of the arm inner space 415 (see FIG. 6 ), and two cross sections that are arc-shaped and protrude upward from two radially opposite locations on the top of the columnar wall 422 and are clamped into the assembly wall 424 of the lower arm body 412.

The pressing member 43 includes a ring portion 431 located in the arm inner space 415 and looped around the extension wall 423 and capable of abutting the extension wall 423, and a ring portion 431 protruding outward from the ring portion 431 for the suction The protrusion 432 of the group 41. The ring portion 431 includes a fixed section 433 (see FIG. 4) inserted into the lower arm body 412, and a U-shaped section connected to the fixed section 433 with an opening facing the fixed section 433. 434. The protruding part 432 protrudes from the U-shaped section 434 opposite to the fixed section 433 and spaced apart from the fixed section 433 to extend out of the suction group 41.

The exhaust pipe 45 is in gas communication with the exhaust passage 416 at one end, and the other end is in gas communication with the exhaust module 44 (see FIG. 3 ), so that the exhaust module 44 can extract gas. Since the structure and installation technology of the air extraction module 44 and the air extraction pipe 45 are common knowledge and are not the focus of this creation, the description is omitted here.

The non-return unit 5 includes a non-return valve 51 inserted in the cup cover 32 and a dumbbell-shaped extractor 52 inserted in the non-return valve 51.

The check valve 51 includes a valve body 511 that is inserted into the first through hole 361 and has a lower width and an upper narrow outer shape, and a flexible body that extends outward from the top end of the valve body 511 and covers the Wait for the valve ring portion 512 above the second through hole 362. The thickness of the valve ring portion 512 gradually becomes thinner from the inside to the outside in the radial direction and covers the top of the second through holes 362 to block the cup cover space 35 from communicating with the cup inner space 311. The extracting member 52 is convenient for a user to take the anti-reverse unit 5.

The protection unit 6 includes an outer cylindrical wall 61 that is screwed to the peripheral wall 325 of the cup cover 32 and has a circular cross-section, and an inner peripheral wall 324 that is internally and externally spaced from the outer cylindrical wall 61 and surrounds the cup cover 32 The inner column wall 62, a circular connecting wall 63 connected between the inner column wall 62 and the central part of the outer column wall 61, and a circular connecting wall 62 connected to the bottom end of the inner column wall 62 and A protective wall 64 shielded under the through hole group 36 of the cup cover 32.

The inner column wall 62 cooperates with the protective wall 64 to form a protective space 65 for accommodating the inner wall 324. The connecting wall 63 is formed with a plurality of communication holes 631 penetrating up and down to connect the cup inner space 311 and the protection space 65. The communicating holes 631 are arranged at intervals along the arc, and the second through holes 362 of the through hole group 36 are connected to the cup inner space 311 through the protective space 65. The protective wall 64 can prevent the liquid in the cup inner space 311 from splashing the check valve 51.

4, 5, 7, the non-return unit 5 of the first embodiment can be shielded by the second through holes 362 of the through hole group 36 as shown in FIG. The deformation of the unit 4 is converted to a deformed state as shown in FIG. 7 which is spaced from the second through holes 362 so that the second through holes 362 communicate with the cup inner space 311 and the cup cover space 35.

When the first embodiment is not in operation, the valve ring portion 512 of the check valve 51 abuts on the cover wall 323 of the cup cover 32 as shown in FIG. 5, and shields the second through holes The top of 362. When the pumping unit 4 starts to pump the cup cover space 35, the pressure of the cup cover space 35 will be lower than the cup inner space 311 first, so the gas in the cup inner space 311 will follow the cup cover space 311. The sequence of the space 311-the communicating holes 631-the protective space 65 flows to the cup cover space 35 through the second through holes 362. When the gas attempts to flow into the cup cover space 35 through the second through holes 362, since the outer part of the valve ring portion 512 of the check valve 51 is relatively thin, the valve ring portion 512 can be as shown in FIG. 7 It is lifted and deformed by gas and is spaced apart from the second through holes 362 so that the second through holes 362 communicate with the cup cover space 35. In addition, due to the relatively thin outer periphery of the valve ring portion 512, when the pumping unit 4 stops pumping, the pressure in the cup inner space 311 is lower than the pressure in the cup cover space 35, which will also cause the valve The attraction of the ring portion 512 toward the second through holes 362 causes the valve ring portion 512 to return to the state shown in FIG. 5 to cover the second through holes 362, and to prevent gas from passing through the second through holes 362. The through hole 362 flows into the cup inner space 311 through the protective space 65 and the communication holes 631, so that the low pressure or vacuum state in the cup inner space 311 can be maintained.

Referring to Figures 4, 6, and 8, the air extraction valve 42 of the first embodiment can be transformed from a state of being covered on the lid 32 to close the lid space 35 as shown in FIG. A communication state as shown in FIG. 8 for the cup cover space 35 to communicate with the outside.

In the covered state, the valve wall 421 of the air extraction valve 42 abuts against the outer ring wall 321 of the cup cover 32 and cooperates with the air extraction column 413 of the air extraction unit 4 to close the cover space 35 . When the user presses the protruding part 432 of the pressing member 43, the U-shaped sections 434 of the ring part 431 will be driven and deformed in cooperation, thereby allowing the protruding part 432 to be moved into the arm inner space 415. Squeeze in and squeeze the extension wall 423 of the air extraction valve 42 through the ring part 431 as shown in FIG. 8, and drive the valve wall 421 to the communicating state. In the communicating state, the portion where the valve wall 421 connects to the extension wall 423 deforms, and is partially spaced from the outer ring wall 321 of the cup lid 32, and cooperates to form a space 35 communicating with the cup lid and located in the cup. The gap 7 between the cover 32 and the valve wall 421 allows gas to pass through the gap 7 into the cup cover space 35, so that the cup cover space 35 communicates with the outside world and balances with the outside pressure, which facilitates the separation of the air extraction valve 42 and the Cup lid 32.

Referring to Figures 3, 4, and 9, the air extraction group 41 of the first embodiment can extend laterally as shown in Figure 3 for the air extraction valve 42 to cover the cup cover 32 to close the cup cover space The horizontal position of 35 is pivoted relative to the handle 22 of the body unit 2 and transformed to a separated position where the air suction valve 42 is separated from the cup cover 32 as shown in FIG. 9.

Referring to Figures 3, 5, 7, and 8, when the first embodiment is used, the prepared food or food is first put into the cup inner space 311, the cup cover 32 is covered, and the exhaust group 41 is placed This yaw position is shown in FIG. 5. Then start the air extraction module 44, as shown in FIG. 7 to extract air from the cup lid space 35 and the cup inner space 311 until the pressure of the cup inner space 311 is low enough, close the air extraction module 44, and make In the first embodiment, due to the low pressure state of the space 311 in the cup, it returns from FIG. 7 to the state shown in FIG. 5 again. Then, the driving module 23 can be activated to drive the conditioning group 34 to prepare food or food.

Referring to Figures 3, 8, and 9, after the conditioning is completed, the user only needs to press the pressing member 43 of the air extraction unit 4 to deform the air extraction valve 42 as shown in Figure 8 to form the gap 7 after the pressure is released. The suction group 41 can be pivoted upward to bring the suction group 41 to the separated position as shown in FIG. 9, and the cup group unit 3 can be removed from the body unit 2. At this time, since the valve ring portion 512 of the check valve 51 covers the second through holes 362, external air will not enter the cup inner space 311 through the second through holes 362, so that While maintaining the cup inner space 311 in a low pressure state, the cup group unit 3 can be removed from the body unit 2.

In summary, the effect of the air extraction conditioning device of the present invention is that the air extraction valve 42 can be deformed to produce the design of the gap 7, allowing the cup cover space 35 to directly communicate with the outside world without special pressure relief valves. The invention has the advantages of easy production and manufacturing, low failure rate and parts consumption rate.

The above are only examples of the present invention, and cannot be used to limit the scope of patent application of the present invention, and equivalent changes made according to the scope of patent application of the present invention and the contents of the specification should also be the present invention. Covered by the scope of the patent application.

2: body unit 21: Chassis 22: Grip 23: drive module 24: Power module 3: Cup unit 31: Cup body 311: Space in the Cup 32: Cup lid 321: Outer Ring Wall 322: inner ring wall 323: Cover Wall 324: inner wall 325: Peripheral Wall 326: Around the Wall 33: Washer 34: conditioning group 35: Cup lid space 36: Through hole group 361: first through hole 362: second through hole 4: Air extraction unit 41: Exhaust group 411: upper arm body 412: lower arm body 413: Exhaust Column 414: Gas Mouth 415: arm space 416: Exhaust Channel 42: Exhaust valve 421: Valve Wall 422: columnar wall 423: Extension Wall 424: assembly wall 44: exhaust module 45: Exhaust pipe 43: pressing piece 431: Ring Parts 432: Projection 433: fixed segment 434: U-shaped segment 5: Non-reverse unit 51: check valve 511: Valve Body 512: Valve Ring 52: extract 6: Protection unit 61: Outer column wall 62: inner column wall 63: connecting wall 631: connecting hole 64: protective wall 65: Protected space 7: gap

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a perspective view illustrating an existing exhaust air conditioning device; Figure 2 is an incomplete cross-sectional view illustrating the existing air extraction conditioning device; Figure 3 is a perspective view illustrating an air extraction group of an embodiment of the air extraction conditioning device of the present invention in a horizontal position; Figure 4 is an incomplete three-dimensional exploded view illustrating this embodiment; Figure 5 is an incomplete cross-sectional view, cut along the front and back direction, illustrating that a non-return unit of this embodiment is in a shielded state, and an air extraction valve of this embodiment is in a covered state; Figure 6 is an incomplete cross-sectional view, cut along the left and right directions, to illustrate that the non-return unit is in the shielded state, and the exhaust valve is in the covered state; Figure 7 is an incomplete cross-sectional view, cut in the front-to-back direction and similar to Figure 5, illustrating that the check unit is in a deformed state and the air extraction valve is in the covered state; Figure 8 is an incomplete cross-sectional view, cut in the left-right direction and similar to Figure 6, illustrating that the check valve is in the shielded state and the air extraction valve is in a communicating state; and Fig. 9 is a perspective view illustrating that the suction group of this embodiment is in a separated position.

3: Cup unit

31: Cup body

311: Space in the Cup

32: Cup lid

321: Outer Ring Wall

322: inner ring wall

323: Cover Wall

324: inner wall

325: Peripheral Wall

326: Around the Wall

33: Washer

35: Cup lid space

36: Through hole group

361: first through hole

362: second through hole

4: Air extraction unit

41: Exhaust group

411: upper arm body

412: lower arm body

413: Exhaust Column

414: Gas Mouth

415: arm space

416: Exhaust Channel

42: Exhaust valve

421: Valve Wall

422: columnar wall

423: Extension Wall

424: assembly wall

43: pressing piece

431: Ring Parts

432: Projection

433: fixed segment

434: U-shaped segment

5: Non-reverse unit

51: check valve

511: Valve Body

512: Valve Ring

52: extract

6: Protection unit

61: Outer column wall

62: inner column wall

63: connecting wall

631: connecting hole

64: protective wall

65: Protected space

7: gap

Claims (9)

An air extraction conditioning device, comprising: a body unit; a cup group unit, including a cup body arranged on the body unit and defining an inner space of the cup, and an openable cover on the cup body and covering the cup body The cup cover of the cup inner space, the cup cover surrounds and defines a cup cover space spaced apart from the cup inner space, and is formed with a through space connected between the cup inner space and the cup cover space and capable of supplying gas flow Hole group; an air extraction unit, including an air extraction group connected to the body unit, and an air extraction valve plugged into the air extraction group and detachably covered on the lid, the air extraction group can penetrate the The air extraction valve sucks air into the cup cover space. The air extraction valve can abut against the cup cover and cooperate with the air extraction group to close the cover setting state of the cup cover space, deforming and transforming to a position corresponding to the cup cover Cooperating to define a communication state connecting the gap between the cup cover space and the outside; and a non-reverse unit assembled on the cup cover and shielding the through hole group to block the cup inner space from communicating with the cup cover space, and can When the air extraction unit is pumping air, it is transformed from a deformation state that shields the through hole group to a deformed state for the through hole group to communicate the cup inner space and the cup lid space; wherein, the air extraction valve includes a The valve wall that is flexible and abuts against the cup cover and an extension wall extending upward from the valve wall. The air extraction unit further includes a pressing member, and the pressing member includes a ring member looped around the extension wall Part, and a protruding part protruding outward from the ring part. The protruding part can be pressed by the user to drive the ring part to squeeze the extension wall, so as to drive the valve wall to deform through the extension wall to make the The valve wall cooperates with the cup cover to define the Gap and communicate with the outside world. The air extraction conditioning device according to claim 1, wherein the cup cover includes an outer ring wall abutting the top edge of the cup body, an inner ring wall extending downward from the inner edge of the outer ring wall, and a connection A cover wall extending laterally at the bottom edge of the inner ring wall, the inner ring wall cooperates with the cover wall to define the cup cover space with the opening facing upward, the cover wall is formed with the through hole group, and the through hole group includes A first through hole for inserting the check unit, and a second through hole spaced from the first through hole and penetrating up and down to connect the cup cover space and the cup inner space, the check unit can From the shielding state of shielding the second through hole, the deformation is converted to the deformed state of being spaced apart from the second through hole and allowing the second through hole to communicate with the cup inner space and the cup lid space. The air extraction conditioning device according to claim 2, wherein the check unit includes a check valve, the check valve includes a valve body inserted into the first through hole, and a flexible The valve body portion extends outward and covers the valve ring portion above the second through hole. The valve ring portion can be deformed when the gas is extracted from the lid space, and is spaced apart from the second through hole, and provides The second through hole communicates with the cup inner space and the cup cover space. The air extraction conditioning device according to claim 3, wherein the thickness of the valve ring portion becomes thinner from the inside to the outside in the radial direction. The air extraction conditioning device according to claim 1, wherein the air extraction group is pivotally connected to the body unit, and can extend in a lateral direction for the air extraction valve cover to be arranged in a lateral position of the cup cover, relative to the body The unit pivots to transform to a separation position extending up and down and separating the air suction valve from the cup lid. The air extraction conditioning device according to claim 1, wherein the air extraction group includes a An air extraction column in a columnar shape and inserted into the air extraction valve, and a gas nozzle extending laterally to connect the air extraction column for gas to be extracted, and the air extraction column and the air nozzle cooperate to define a top seal And the bottom end is connected with the cup cover space and is laterally opened to the suction channel. The air extraction conditioning device according to claim 6, wherein the air extraction group includes an upper arm body and a lower arm body that cooperate to define an arm inner space, and the air extraction column protrudes downward from the lower arm body and is inserted into the An air extraction valve, the air extraction valve includes a flexible and annular valve wall abutting the cup lid, a hollow cylindrical shape and extending upward from the valve wall and for the air extraction column to plug in to make the extraction The air passage communicates with the cylindrical wall of the cup cover space, and an extension wall extending upward from the valve wall and protruding into the inner space of the arm. The pumping unit further includes a pressing member, the pressing member including a The inner space of the arm is sleeved on the ring part outside the extension wall, and a projecting part protruding from the ring part to the suction unit, the projecting part can be pressed and driven by the user to drive the ring part The extension wall is squeezed to drive the deformation of the valve wall through the extension wall so that the valve wall and the cup cover cooperate to define the gap and communicate with the outside. The air extraction conditioning device according to claim 7, wherein the ring part includes a fixed section inserted in the air extraction group, and a substantially U-shaped section connected to the fixed section with an opening facing the fixed section U-shaped section, the protruding piece part protrudes from the U-shaped section opposite to the fixed section and spaced apart from the fixed section to extend out of the suction group. The air extraction conditioning device according to claim 2, wherein the cup cover further includes an inner wall extending downward from the cover wall and having a circular cross-section and surrounding the through hole group, and an inner wall formed by the cover wall Extend down and surround the inner circumference at intervals The peripheral wall of the wall, the air extraction conditioning device further includes a protection unit, the protection unit includes an outer column wall connected to the peripheral wall and having a circular cross section, an inner and outer spaced from the outer column wall and surrounding the inner surrounding wall The inner column wall, a ring-shaped connecting wall connected between the inner column wall and the outer column wall, and a protective wall connected to the bottom end of the inner column wall and shielded below the through hole group, the inner The column wall cooperates with the protective wall to form a protective space accommodating the inner wall, the connecting wall is formed with a plurality of communication holes that penetrate up and down to communicate the cup inner space and the protective space, and the second through hole penetrates the protective space The communicating holes communicate with the space in the cup.

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