CN213721810U

CN213721810U - Blast drying type water tank dish washer

Info

Publication number: CN213721810U
Application number: CN202022525943.XU
Authority: CN
Inventors: 张祥程; 于水; 邢双喜; 徐梁波
Original assignee: Bigdipper Smart Electric Appliance Co Ltd
Current assignee: Bigdipper Smart Electric Appliance Co Ltd
Priority date: 2020-11-04
Filing date: 2020-11-04
Publication date: 2021-07-20
Anticipated expiration: 2030-11-04

Abstract

The utility model provides a blast drying type water tank dish washing machine, which relates to the technical field of kitchen appliances, and comprises a water tank and a blast device arranged outside the water tank; the side wall of the water tank is provided with a first through hole, the water tank is provided with a table board, and the table board is provided with a second through hole communicated with the outside air; the air blowing device is provided with a breathing passage and an air blowing passage, a breathing inlet of the breathing passage is communicated with the inner cavity of the water tank through a first through hole, a breathing outlet of the breathing passage is communicated with the outside air, an air suction port of the air blowing passage is communicated with a second through hole, and an air outlet of the air blowing passage is communicated with the inner cavity of the water tank through the first through hole. The utility model provides a dry formula basin dish washer of blast air can directly extract gas and carry out the drying to the tableware in the basin from the outside air, has avoided the secondary pollution of tableware from the root, and can guarantee smooth intaking.

Description

Blast drying type water tank dish washer

Technical Field

The utility model belongs to the technical field of the kitchen appliance technique and specifically relates to a dry formula basin dish washer of blast air is related to.

Background

A tableware drying mode of the existing water tank dish washing machine is hot air drying, and the specific working principle is as follows: hot air is blown into the inner cavity of the dish washing machine through the fan, the hot air is used for airing tableware and then is discharged into the inner space of the cabinet through the respirator on the side wall of the inner cavity of the dish washing machine, although part of water can be condensed and discharged in the respirator, a large amount of water vapor still exists in the hot air discharged into the cabinet, the cabinet is easily damped and mildewed after the dish washing machine is used for a long time, the fan usually directly extracts air from the cabinet, the polluted air continuously flows between the dish washing machine and the cabinet, a polluted air circulation is formed, the secondary pollution of the tableware is caused, and the mildewing speed of the cabinet is accelerated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a blast air drying formula basin dish washer can avoid the secondary pollution of tableware from the root, can not lead to the cupboard to wet and go mouldy.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a blast drying type water tank dish washing machine, which comprises a water tank and a blast device arranged outside the water tank;

the side wall of the water tank is provided with a first through hole, the water tank is provided with a table board, and the table board is provided with a second through hole communicated with the outside air;

the air blowing device is provided with a breathing passage and an air blowing passage, the breathing inlet of the breathing passage is communicated with the inner cavity of the water tank through the first through hole, the breathing outlet of the breathing passage is communicated with the outside air, the air suction port of the air blowing passage is communicated with the second through hole, and the air outlet of the air blowing passage is communicated with the inner cavity of the water tank through the first through hole.

Further, the air blowing device comprises a shell and an air guide assembly arranged outside the shell;

the breathing passage is formed in the shell, the breathing inlet and the breathing outlet are both positioned on the shell, and the breathing inlet is arranged towards the water tank;

have on the shell with breathe the relative setting of entry and intercommunication the air exit, the inlet scoop is located the shell perhaps on the air guide component, so that the blast air passageway shaping in the inner chamber of shell with between the air guide component, or direct molding in the air guide component.

Furthermore, the air blowing channel comprises a front air channel and a rear air channel, the front air channel is formed in the shell, one end of the front air channel is the air suction opening, and the other end of the front air channel is a switching opening formed in the shell;

the rear air duct is formed in the air guide assembly, one end of the air guide assembly is communicated with the adapter, and the other end of the air guide assembly is communicated with the air outlet.

Furthermore, the air guide assembly comprises a fan and an air guide shell, an inlet of the fan is communicated with the adapter, one end of the air guide shell is communicated with an outlet of the fan, and the other end of the air guide shell is communicated with the air outlet.

Further, a heater is arranged in the air guide shell.

Further, still have inhalant canal and locate in the shell flowmeter in the inhalant canal, inhalant canal one end be used for with outside water source intercommunication, the other end with breathe the entry intercommunication.

Furthermore, a non-return component is arranged at the air outlet, so that the air flow in the air blowing channel flows into the water tank in a single direction.

Further, the breathing device also comprises a fastening piece positioned in the water tank, the fastening piece penetrates through the first through hole and is connected to the breathing inlet, and a plurality of air holes are formed in the fastening piece.

Further, the subassembly that induced drafts is installed to the air suction mouth department, the subassembly that induced drafts includes the induced draft board, the induced draft board has a plurality of induced drafts the hole.

Furthermore, the subassembly that induced drafts still includes the seat of induced drafting, the seat of induced drafting set up in mesa below, the board of induced drafting passes the second through-hole with the seat of induced drafting is connected, the seat cartridge of induced drafting is in induced drafting the mouth.

The utility model provides a dry formula basin dish washer of blast air can produce following beneficial effect:

when the blowing and drying type water tank dish washing machine is used, outside air enters the air suction opening of the blowing channel through the second through hole and enters the water tank through the air outlet of the blowing channel and the first through hole to dry tableware in the water tank. In the water inlet process before washing, gas in the water tank can enter the breathing inlet of the breathing channel through the first through hole and is discharged to the outside through the breathing outlet of the breathing channel, and the balance between the air pressure in the water tank and the external air pressure is ensured.

Compared with the prior art, the utility model provides a dry formula basin dish washer of blast air can directly extract gas from the ambient air and carry out the drying to the tableware in the basin, has avoided the secondary pollution of tableware from the root, and can guarantee the in-process of intaking, and smooth intaking is realized to the equilibrium of basin internal gas pressure and ambient gas pressure.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic three-dimensional structure diagram of a water tank provided in an embodiment of the present invention;

fig. 2 is a schematic three-dimensional structure diagram of a blast drying type sink dishwasher according to an embodiment of the present invention at a first viewing angle;

FIG. 3 is a partial cross-sectional view of a forced air drying sink dishwasher in accordance with an embodiment of the present invention;

fig. 4 is a schematic three-dimensional structure diagram of the blower device according to the embodiment of the present invention when being engaged with a fastener;

fig. 5 is an exploded view of a housing according to an embodiment of the present invention;

fig. 6 is a schematic three-dimensional structure diagram of a blower device according to an embodiment of the present invention;

fig. 7 is an exploded view of the blower device according to the embodiment of the present invention at a first viewing angle when the blower device is engaged with a fastener;

fig. 8 is an exploded view of the blower device provided by the embodiment of the present invention at a second viewing angle when engaged with a fastener;

fig. 9 is a schematic three-dimensional structure diagram of a blast drying type sink dishwasher at a second viewing angle according to an embodiment of the present invention.

Icon: 1-a water tank; 11-a first via; 12-a table top; 121-a second via; 13-a trough body; 14-a door cover; 15-door opening means; 2-a blower device; 21-respiratory pathway; 211-respiratory inlet; 212-a breathing outlet; 22-a blast channel; 221-an air suction opening; 222-an air outlet; 223-front air duct; 224-rear air duct; 23-a housing; 231-a front shell; 232-rear shell; 2321-an adapter; 24-a wind guide assembly; 241-a fan; 242-a wind-guiding shell; 243-a heater; 25-a water inlet channel; 26-a flow meter; 27-a backstop assembly; 28-a suction assembly; 281-a suction plate; 282-air suction seat; 283-a second sealing ring; 284-a filter element; 29-a drainage channel; 3-a fastener; 4-first sealing ring.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but 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, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

The present embodiment provides a forced air drying type sink dish washer, as shown in fig. 1 to 3, comprising a sink 1 and a blower device 2 installed outside the sink 1; the side wall of the water tank 1 is provided with a first through hole 11, the water tank 1 is provided with a table board 12, and the table board 12 is provided with a second through hole 121 communicated with the outside air; the air blowing device 2 is provided with a breathing passage 21 and an air blowing passage 22, a breathing inlet 211 of the breathing passage 21 is communicated with the inner cavity of the water tank 1 through the first through hole 11, a breathing outlet 212 of the breathing passage 21 is communicated with the outside air, an air suction port 221 of the air blowing passage 22 is communicated with the second through hole 121, and an air exhaust port 222 of the air blowing passage 22 is communicated with the inner cavity of the water tank 1 through the first through hole 11.

In the case of the above-described blow-drying type sink dish washer, as shown in fig. 1, 3 and 4, the external air enters the air suction opening 221 of the air blowing duct 22 through the second through hole 121, and enters the inside of the sink 1 through the air discharge opening 222 of the air blowing duct 22 and the first through hole 11, thereby drying the dishes in the sink 1. In the water inlet process before washing, the gas in the water tank 1 can enter the breathing inlet 211 of the breathing passage 21 through the first through hole 11 and is discharged to the outside through the breathing outlet 212 of the breathing passage 21, so that the balance between the air pressure in the water tank 1 and the external air pressure is ensured.

For prior art, the dry formula basin dish washer of blast air that this embodiment provided can directly extract gas from the outside air and carry out the drying to the tableware in the basin 1, has avoided the secondary pollution of tableware from the root, and can guarantee into water the in-process, and smooth intaking is realized to the equilibrium of basin 1 internal gas pressure and outside atmospheric pressure.

In the above embodiment, the breathing outlet 212 of the breathing passage 21 and the air outlet 222 of the blowing passage 22 are both communicated with the inner cavity of the water tank 1 through the first through hole 11, that is, one end of the breathing passage 21 is communicated with one end of the blowing passage 22. It should be noted that, except for the above-mentioned end portions of the two, the path passed by the breathing passage 21 does not intersect the path passed by the blowing passage 22, so as to ensure that the external air can be smoothly discharged into the water tank 1 through the blowing passage 22, and the air in the water tank 1 can be smoothly discharged to the outside through the breathing passage 21.

In some embodiments, as shown in fig. 5 and 6, the air blowing device 2 includes a casing 23 and an air guide assembly 24 mounted outside the casing 23; the breathing passage 21 is formed in the shell 23, the breathing inlet 211 and the breathing outlet 212 are both positioned on the shell 23, and the breathing inlet 211 is arranged towards the water tank 1; the casing 23 has an air outlet 222 opposite to and communicated with the breathing inlet 211, and the air inlet 221 is located on the casing 23 or the air guide assembly 24, so that the air blowing channel 22 is formed between the inner cavity of the casing 23 and the air guide assembly 24, or directly formed in the air guide assembly 24.

As shown in fig. 5 and 6, the air suction opening 221 may be located on the outer casing 23, the outer casing 23 includes a funnel-shaped air suction shell, the top end of the air suction shell is opened to form the air suction opening 221, and the air blowing channel 22 is formed between the inner cavity of the outer casing 23 and the air guiding assembly 24. In some other embodiments, the air inlet 221 may also be directly located on the air guiding assembly 24, in this case, the air guiding assembly 24 may include a funnel-shaped air suction shell installed on the outer shell 23, that is, the funnel-shaped air suction shell and the air guiding assembly 24 have an integrated structure, and the air blowing channel 22 is formed in the air guiding assembly 24.

Taking fig. 6 as an example for specific description, in use, the air above the table top 12 enters the air suction opening 221 on the housing 23 from the second through hole 121, passes through the inner cavity of the housing 23 and the air guiding assembly 24, reaches the air exhaust opening 222, enters the first through hole 11 of the water tank 1 from the breathing inlet 211 communicated with the air exhaust opening 222, and is discharged into the water tank 1. At the same time, the air in the water tank 1 can enter the housing 23 through the breathing inlet 211 and be discharged to the outside through the breathing outlet 212 on the housing 23.

The shell 23 may be directly provided with a breathing inlet 211 and a breathing outlet 212, and the shell 23 may also be fixed with two first connecting pieces, which are respectively formed with the breathing inlet 211 and the breathing outlet 212; similarly, the housing 23 may be directly provided with an air inlet 221 and an air outlet 222, and the housing 23 may also be fixed with two second adapters, where the two second adapters are respectively formed with the air inlet 221 and the air outlet 222.

In at least one embodiment, the housing 23 is directly provided with a breathing inlet 211, a breathing outlet 212, an air suction inlet 221 and an air exhaust outlet 222.

Specifically, as shown in fig. 5, the housing 23 includes a front shell 231 and a rear shell 232 that are fastened to each other, the breathing outlet 212 is located at an upper portion of the front shell 231, the breathing inlet 211 is located at the front shell 231 and is disposed opposite to the first through hole 11, and the exhaust outlet is located at the rear shell 232 and is opposite to the breathing inlet 211. Be equipped with many bent plates on the inner wall of shell 231 before back shell 232 orientation, after shell 231 and back shell 232 lock in the front, every bent plate deviates from the tip of back shell 232 and all offsets with preceding shell 231, forms breathing passageway 21 and other gas or water passageways.

In some embodiments, as shown in fig. 7 and 8, in order to stably guide the external air into the water tank 1, the air blowing passage 22 includes a front air duct 223 and a rear air duct 224, the front air duct 223 is formed in the casing 23, one end of the front air duct 223 is the air suction port 221, and the other end of the front air duct 223 is the adaptor port 2321 opened on the casing 23; the rear air duct 224 is formed in the air guide assembly 24, and one end of the air guide assembly 24 is communicated with the switching port 2321, and the other end is communicated with the air outlet 222.

Specifically, as shown in fig. 5, a funnel-shaped air duct is formed at the top of the rear shell 232, an air suction opening 221 is formed at the top opening of the funnel-shaped air duct, and the air suction area of the outer shell 23 can be increased by the funnel-shaped air duct.

As shown in fig. 8, the switching port 2321 is located on the rear shell 232, after the front shell 231 and the rear shell 232 are buckled, a communication cavity is formed between the bending plate on the upper portion of the rear shell 232 and the front shell 231, the funnel-shaped air duct and the switching port 2321 are both communicated with the communication cavity, and the funnel-shaped air duct and the communication cavity jointly form the front air duct 223.

In some embodiments, as shown in fig. 7 and 8, the air guiding assembly 24 includes a fan 241 and an air guiding shell 242, an inlet of the fan 241 is communicated with the adapting port 2321, air at the adapting port 2321 can directly enter the fan 241 under the action of suction force of the fan 241, one end of the air guiding shell 242 is communicated with an outlet of the fan 241, and the other end is communicated with the air outlet 222, so that air exhausted by the fan 241 enters the air outlet 222 through the air guiding shell 242.

The fan 241 and the air guide casing 242 form the rear air duct 224.

The connection modes of the fan 241 and the rear shell 232 and the air guide shell 242 and the rear shell 232 can be various, and specifically, the fan 241 and the air guide shell 242 can be glued, screwed and clamped on the rear shell 232.

In at least one embodiment, as shown in fig. 7, a heater 243 is provided in the air guide casing 242 in order to rapidly dry the dishes in the tub 1.

Among them, the heater 243 may be a PTC heating element.

In some embodiments, as shown in fig. 5, the housing 23 further has a water inlet channel 25 therein, and a flow meter 26 disposed in the water inlet channel 25, wherein one end of the water inlet channel 25 is used for communicating with an external water source, and the other end is communicated with the respiratory inlet 211. When the water inlet channel is used, water can be discharged into the water tank 1 through the breathing inlet 211 through the water inlet channel 25, the cleaning function is achieved, and the flow meter 26 detects the water flow in the water inlet channel 25 so as to better control the water inflow.

The three functions of drying, breathing and water inlet are integrated on the blowing device 2 by the arrangement, so that the assembly of the blowing drying type water tank dish washing machine is facilitated, and the occupied volume is reduced.

As shown in fig. 5, an inverted U-shaped drain channel 29 is further formed in the housing 23, and the drain channel 29 has a drain inlet communicating with the water tub 1 and a drain outlet for draining the water in the water tub 1.

Specifically, the height of the top of the drainage channel 29 is shorter than that of the breathing outlet 212, and the water level in the water tank 1 is higher than the top of the drainage channel 29 and can be drained through the drainage channel 29, so that the water level is prevented from reaching the breathing outlet 212, and the water can be poured back into the water inlet channel 25.

In some embodiments, as shown in fig. 3 and 8, a non-return assembly 27 is disposed at the air outlet 222 to make the air flow in the air blowing passage 22 flow into the water tank 1 in a single direction, so as to avoid the backflow phenomenon.

The backstop assembly 27 may include a rotating plate rotatably connected to the housing 23, the rotating plate being rotated relative to the housing 23 in a direction away from the air blowing passage 22 to open the air outlet 222 when the dishes in the tub 1 are to be dried; when the air backflow occurs, the rotating plate rotates in a direction approaching the blowing passage 22 with respect to the casing 23 under the push of the air flow to close the air discharge opening 222.

In some embodiments, as shown in fig. 9, the above-mentioned forced air drying type sink dish washer further comprises a fastening member 3 located in the sink 1, the fastening member 3 penetrates the first through hole 11 and is connected to the breathing inlet 211, and the fastening member 3 has a plurality of ventilation holes, which can intensively guide the air flow to the dishes, thereby improving the drying efficiency of the dishes.

Specifically, the fastening member 3 is screwed with the breathing inlet 211 after passing through the first through hole 11.

In at least one embodiment, a first sealing ring 4 is further interposed between the rear shell 232 and the water tank 1.

In some embodiments, as shown in fig. 8, the air suction assembly 28 is installed at the air suction opening 221, and the air suction assembly 28 includes an air suction plate 281, and the air suction plate 281 has a plurality of air suction holes, and external air can enter the air suction opening 221 through the plurality of air suction holes.

The shapes of the air holes and the air suction holes are not particularly limited, and the shapes such as round, long strip and the like are suitable.

On the basis of the above embodiment, as shown in fig. 8, in order to facilitate the installation of the air suction plate 281, the air suction assembly 28 further includes an air suction seat 282, the air suction seat 282 is disposed below the table top 12, the air suction plate 281 passes through the second through hole 121 to be connected to the air suction seat 282, and the air suction seat 282 is inserted into the air suction opening 221.

In order to ensure good sealing performance between the air suction seat 282 and the table top 12, a second sealing ring 283 may be further interposed between the air suction seat 282 and the table top 12, and a filtering member 284 may be further disposed in the air suction seat 282, wherein the filtering member 284 may filter dust and prevent impurities or insects from entering the water tank 1.

The filter 284 may be filter cotton, metal mesh, or porous ceramic.

In addition, as shown in fig. 9, the sink 1 may include a tank body 13, a door cover 14, and a door opening device 15; the tank body 13 is provided with an upward opening, the inner wall of the tank body 13 is provided with a first through hole 11, the air blowing device 2 is arranged outside the tank body 13, and the table board 12 is arranged at the top of the tank body 13; the door 14 is pivoted to the table top 12; a door opener 15 is installed outside the tank body 13, and the door opener 15 is used for driving the door cover 14 to rotate relative to the tank body 13 to close or open the opening.

Specifically, the door opener 15 is an electric push rod structure, and the electric push rod penetrates upwards from the lower part of the table top 12 and can move up and down relative to the table top 12 to push the door cover 14 to rotate up and down, and a ventilation gap is formed between the door cover 14 and the table top 12 to discharge air in the water tank 1 to the outside in the drying process.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A blast drying type sink dishwasher, characterized by comprising a sink (1) and a blast apparatus (2) mounted outside the sink (1);

a first through hole (11) is formed in the side wall of the water tank (1), the water tank (1) is provided with a table board (12), and a second through hole (121) communicated with the outside air is formed in the table board (12);

air-blast device (2) have breathing passageway (21) and blast air passageway (22), breathing entry (211) of breathing passageway (21) are passed through first through-hole (11) with the inner chamber intercommunication of basin (1), breathing exit (212) and the outside air intercommunication of breathing passageway (21), inlet scoop (221) of blast air passageway (22) with second through-hole (121) intercommunication, air exit (222) of blast air passageway (22) pass through first through-hole (11) with the inner chamber intercommunication of basin (1).

2. The forced air dry sink dishwasher of claim 1, characterized in that the blowing device (2) comprises an outer casing (23) and a wind guiding assembly (24) mounted outside the outer casing (23);

the breathing passage (21) is formed in the shell (23), the breathing inlet (211) and the breathing outlet (212) are both positioned on the shell (23), and the breathing inlet (211) is arranged towards the water tank (1);

have on shell (23) with breathe entry (211) relative setting and intercommunication exhaust outlet (222), inlet scoop (221) are located shell (23) or on air guide component (24), so that blast air passageway (22) shaping in the inner chamber of shell (23) with between air guide component (24), or direct shaping in air guide component (24).

3. The forced air drying sink dishwasher of claim 2, wherein the blast channel (22) comprises a front air duct (223) and a rear air duct (224), the front air duct (223) being formed in the housing (23), one end of the front air duct (223) being the air suction opening (221), the other end of the front air duct (223) being an adapter opening (2321) provided on the housing (23);

the rear air duct (224) is formed in the air guide assembly (24), one end of the air guide assembly (24) is communicated with the switching port (2321), and the other end of the air guide assembly is communicated with the air outlet (222).

4. The forced air drying sink dishwasher of claim 3, wherein the air guide assembly (24) comprises a fan (241) and an air guide shell (242), an inlet of the fan (241) is in communication with the adaptor port (2321), one end of the air guide shell (242) is in communication with an outlet of the fan (241), and the other end is in communication with the air outlet (222).

5. The forced air dry sink dishwasher of claim 4, wherein a heater (243) is provided within the air guide housing (242).

6. The forced air drying sink dishwasher of claim 2, characterized in that the housing (23) further has a water inlet channel (25) therein and a flow meter (26) disposed in the water inlet channel (25), the water inlet channel (25) having one end for communicating with an external water source and the other end communicating with the breath inlet (211).

7. A forced air drying sink dishwasher according to any one of claims 1-6, characterized in that a non-return assembly (27) is provided at the air outlet (222) to allow a unidirectional flow of air in the air blast channel (22) into the sink (1).

8. A forced air drying sink dishwasher according to any one of claims 1-6, further comprising a fastening member (3) located within the sink (1), the fastening member (3) extending through the first through hole (11) and being connected to the breath inlet (211), the fastening member (3) having a plurality of ventilation apertures.

9. The blow-dry sink dishwasher according to any one of claims 1 to 6, characterized in that an air suction assembly (28) is mounted at the air suction opening (221), the air suction assembly (28) comprising an air suction plate (281), the air suction plate (281) having a plurality of air suction holes.

10. The forced air drying sink dishwasher of claim 9, wherein the air suction assembly (28) further comprises an air suction seat (282), the air suction seat (282) being disposed below the top (12), the air suction plate (281) being connected to the air suction seat (282) through the second through hole (121), the air suction seat (282) being inserted into the air suction opening (221).