CN218606275U - Food processor capable of automatically feeding - Google Patents

Abstract

The utility model discloses a but food preparation machine of automatic feeding, relate to life electrical apparatus field, food preparation machine includes the organism, locate the organism and have the cup in crushing chamber and set up the motor in the cup bottom, the diapire that runs through the cup by motor drive's pivot stretches into in the cup, the pivot end is equipped with reducing mechanism, food preparation machine still includes automatic feeding device and locates the lower feed bin of cup top, lower feed bin has can with the unloading chamber of smashing the chamber intercommunication and with suction hole and the unloading hole of automatic feeding device intercommunication, be equipped with the retaining structure between suction hole and the unloading hole, in order to prevent that the material from getting into the suction hole, through being equipped with the retaining structure between suction hole and unloading hole, when making automatic feeding device breathe in, the material that inhales the unloading intracavity from the unloading hole can stop to the suction hole removal under the blocking of retaining structure, prevent that it from inhaling in the suction hole, thereby effectively avoided leading to the suction hole in the material suction hole breathe in not in the smooth even blockking up.

Description

Food processor capable of automatically feeding

Technical Field

The utility model relates to a life electrical apparatus technical field, concretely relates to but automatic feeding's food preparation machine.

Background

The existing food processor usually comprises a machine body, a cup body which is arranged on the machine body and is provided with a crushing cavity and a motor which is arranged at the bottom of the cup body, wherein a rotating shaft driven by the motor penetrates through the bottom wall of the cup body and extends into the cup body, the tail end of the rotating shaft is provided with a crushing device, a user puts materials into the crushing cavity firstly when using the food processor to process food materials, then the processing realized by means of the high-speed rotation of the crushing device is realized, but the food processor needs the user to manually and automatically add materials into the crushing cavity, and the operation is very inconvenient.

For the convenience of unloading, the current unloader who installs in cup top, store the box and set up the quantitative groove that the intercommunication was stored box and was smashed the chamber storing box below through the setting, and the effect of induced drafting at the fan will store the material in the box and inhale to the quantitative groove in and realize the unloading, but how much of the unable effective control unloading of this kind of unloading mode, the unable proportional relation who guarantees to get into each material in smashing the chamber, the taste greatly reduced that leads to the output thick liquid, and have partial material to inhale to fan or pipeline when the fan induced drafts, lead to the pipe blockage or fan stop work even, cause the complete machine to eat material processing interrupt, seriously influence consumer's use experience.

Disclosure of Invention

An object of the utility model is to provide a but automatic feeding's food preparation machine for material volume and the easy problem that inhales pipeline and fan of material when solving unable accurate unloading among the current food preparation machine.

In order to realize the above-mentioned purpose, the utility model provides a but food preparation machine of automatic feeding, which comprises a bod, locate the organism and have the cup in crushing chamber and set up the motor in the cup bottom, the diapire that runs through the cup by motor drive's pivot stretches into in the cup, the pivot end is equipped with reducing mechanism, food preparation machine still includes automatic feeding device and locates the lower feed bin of cup top, lower feed bin has can with the unloading chamber of crushing chamber intercommunication and with suction hole and the feed opening of automatic feeding device intercommunication, be equipped with the stock stop structure between suction hole and the feed opening, in order to prevent that the material from getting into the suction hole.

This application is through setting up automatic feeding device with food preparation machine and locating the lower feed bin of cup top, and lower feed bin has the unloading chamber that can communicate with crushing chamber and with the suction hole and the unloading hole of automatic feeding device intercommunication, make the user when using food preparation machine, breathe in through automatic feeding device so that the unloading intracavity forms the negative pressure, and the material among the automatic feeding device is inhaled the unloading intracavity under the suction effect, the back is accomplished in the feeding, automatic feeding device stops to breathe in and unloading chamber and crushing chamber intercommunication so that the material enters into crushing chamber, accomplish automatic feeding, user's both hands have been liberated, the user need not to be reinforced in the crushing chamber by oneself, food preparation machine's intellectuality and automation have been improved, joyful user experience. And through negative pressure material loading to unloading chamber volume is fixed, and then can realize the measurement of material, the accuracy nature of material volume when guaranteeing the unloading, thereby promote the proportion between each batching when eating material processing, improve the taste of output thick liquid.

Simultaneously be equipped with between suction hole and the unloading hole and keep off the material structure, when making automatic feeding device breathe in, the material that inhales the unloading intracavity from the unloading hole can stop to the suction hole removal under keeping off blocking of material structure, prevent that it from inhaling in the suction hole, thereby effectively avoided the material to inhale and lead to the suction hole to breathe in smoothly or even blockked up in the suction hole, cause the condition that the material can't inhale unloading chamber, and then cause the interruption of complete machine edible material processing, guarantee switching on of suction hole, improve the stability of complete machine operation.

In a preferred implementation manner of the food processor capable of automatically feeding, the blanking hole and the air suction hole are both arranged on the top wall of the blanking cavity, and the material blocking structure comprises a first baffle plate which extends upwards from the bottom wall of the blanking cavity to a position between the blanking hole and the air suction hole.

Through all locating the roof in unloading chamber with unloading hole and suction hole for when the material got into the unloading chamber through the unloading hole, the material can also directly fall into the unloading chamber with the help of the action of gravity, not only can avoid the material to stop in the unloading hole, can also improve the speed of unloading, and then shortens to eat the consuming time of material processing. And after the materials are sucked into the blanking cavity, the materials can be accumulated at the bottom of the blanking cavity and upwards stacked along with the increase of the materials, and the material blocking structure comprises a first baffle plate which upwards extends from the bottom wall of the blanking cavity to a position between the blanking hole and the air suction hole, so that the materials can directly collide with the first baffle plate in the process of moving to the air suction hole, the materials are effectively blocked, and the materials are prevented from entering the air suction hole.

In a preferred implementation manner of the food processor capable of automatically feeding, the material blocking structure further comprises a second baffle plate which extends downwards from the top wall of the discharging cavity and is staggered with the first baffle plate in the axial direction of the discharging cavity, and the second baffle plate is positioned between the air suction hole and the discharging hole.

Set up to still include the second baffle that extends downwards and misplace with first baffle in the axial of feed bin under from the roof in unloading chamber through keeping off the material structure, when making the material enter into the unloading chamber from the unloading hole, if lighter material is directly inhaled to the suction hole, the material can directly collide with the second baffle, realize effectively blockking to the material, further avoid the material to inhale to the suction hole in, the cooperation of first baffle and second baffle, realized stopping to the all-round of unloading material in the chamber, prevent that the material from inhaling to the suction hole in.

In a preferred embodiment of the automatically loadable food processor, the first apron partially coincides with the second apron in the radial direction of the lower magazine.

Through setting up first baffle and second baffle into the partial coincidence in the footpath of feed bin under for first baffle and second baffle cooperation form certain tortuous labyrinth route between suction hole and unloading hole, even the material can pass through first baffle, also can prevent it to enter into to the suction hole under the blockking of second baffle, further promoted the effect that blocks of keeping off the material structure.

In a preferred embodiment of the automatically loadable food processor, the first baffle is provided in a plurality and spaced apart in the circumferential direction of the blanking chamber, and/or,

the second baffle extends downwards along the circumferential direction of the blanking hole.

Through setting up first baffle into a plurality ofly and along the circumference interval setting in unloading chamber for first baffle realizes blockking the material in a plurality of positions, guarantees that each position department material homoenergetic effectively blocks and prevents to get into in the suction hole.

Through setting up the second baffle into the circumference downwardly extending along the unloading hole for the second baffle realizes the omnidirectional to blockking to the material of whereabouts in the unloading hole, further improves blockking effect of second baffle.

In a preferred implementation mode of the food processor capable of automatically feeding, the first baffle extends to abut against the top wall and the side wall of the blanking cavity to divide the blanking cavity into a storage cavity communicated with the blanking hole and an air suction cavity communicated with the air suction hole, and the first baffle is further provided with a first air hole communicating the storage cavity with the air suction cavity.

Through setting up first baffle to divide the unloading chamber for the storage chamber with unloading hole intercommunication and with the chamber of breathing in hole intercommunication, and first baffle still is equipped with the first bleeder vent with storage chamber and chamber intercommunication of breathing in for the unloading chamber realizes functional subregion, promptly: storage silo realizes storing up and the unloading of material, and the chamber of breathing in can only breathe in, and when the suction hole breathed in, the gas in the storage chamber breathes in to the suction hole through first bleeder vent, and the material stays in the storage chamber under the blockking of first baffle, realizes blockking in the storage chamber the all-round of material.

In a preferred implementation mode of the food processor capable of automatically feeding, the material blocking structure comprises a material blocking plate covering the air suction hole, and the material blocking plate is provided with a second air hole communicating the air suction hole with the blanking cavity.

Set up to close the striker plate on the suction hole including the lid through keeping off the material structure, and the striker plate is equipped with the second bleeder vent with suction hole and unloading chamber intercommunication, realizes the all-round isolation to suction hole and unloading hole, has effectively avoided the material to inhale to the suction hole in to do not occupy unloading chamber space, make the unloading chamber can save more materials, reduce the number of times of unloading chamber repetition.

In a preferred implementation of the food processor capable of automatically feeding, the striker plate is formed by cross-connecting a plurality of transverse ribs and longitudinal ribs, and the transverse ribs and the longitudinal ribs are enclosed to form second air holes.

Through setting up the striker plate into by many horizontal muscle with indulge muscle cross connection and form, horizontal muscle encloses with indulging the muscle and closes formation second bleeder vent for the quantity of second bleeder vent can increase, improves the efficiency of breathing in, guarantees that automatic unloader can provide higher negative pressure and then improve unloading efficiency.

In a preferred embodiment of the automatically loadable food processor, at least part of the transverse or longitudinal ribs extend towards the discharge chamber.

Through setting up at least part of horizontal muscle or indulge the muscle and extend for towards the unloading chamber for the material when removing to the suction hole, can directly bump with horizontal muscle or indulge the muscle, realize blockking to the material, avoid the material to get into and lead to its jam in the second bleeder vent.

In a preferred implementation manner of the food processor capable of automatically feeding, the automatic feeding device comprises a suction device and a material containing cavity for containing materials, the suction device is communicated with a suction hole through a suction pipe, and the material containing cavity is communicated with a discharging hole through a discharging pipe.

Through set up automatic feeding device at automatic feeding device and include getter device and be used for holding the flourishing material chamber of material, and getter device and suction hole pass through the breathing pipe intercommunication, and flourishing material chamber passes through unloading pipe intercommunication with the unloading hole for the suction hole is breathed in under getter device so that the unloading chamber forms the negative pressure, and the material in the flourishing material chamber enters into to the unloading chamber through unloading pipe under the suction effect simultaneously, accomplishes the transportation of material.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:

FIG. 1 is a schematic view of a food processor according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a food processor according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of the components of a blanking bin and the like in an embodiment of the present invention;

FIG. 4 is an exploded view of the components of a blanking bin and the like in accordance with one embodiment of the present invention;

fig. 5 is a cross sectional view of the top wall of the blanking cavity and the striker plate in an embodiment of the present invention;

fig. 6 is the utility model relates to an embodiment middle blanking cavity roof and striker plate's schematic structure diagram.

Description of reference numerals:

1-organism; 2-cup body, 21-crushing cavity; 3-blanking bin, 31-blanking cavity, 32-blanking hole, 33-air suction hole, 34-first baffle, 35-second baffle, 36-material baffle, 361-transverse rib, 362-longitudinal rib and 363-second air vent; 4-automatic feeding device; 5-a blanking pipe; 6-air suction pipe; 7-a motor; 8-a crushing device.

Detailed Description

In order to more clearly explain the overall concept of the present invention, the following detailed description is given by way of example in conjunction with the accompanying drawings.

It should be noted that in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.

As shown in fig. 1, fig. 2, fig. 3, the utility model provides a but automatic feeding's food preparation machine, which comprises a bod 1, locate organism 1 and have the cup 2 of smashing chamber 21 and set up the motor 7 in cup 2 bottom, the diapire that runs through cup 2 by motor 7 driven pivot stretches into in the cup 2, the pivot end is equipped with reducing mechanism 8, food preparation machine still includes automatic feeding device 4 and locates the feed bin 3 of cup 2 top, feed bin 3 has can with smash the unloading chamber 31 of chamber 21 intercommunication and with suction hole 33 and the unloading hole 32 of automatic feeding device 4 intercommunication down, be equipped with the structure of keeping off the material between suction hole 33 and the unloading hole 32, in order to prevent that the material from getting into suction hole 33.

This application is through setting up automatic feeding device 4 with food preparation machine and locating 2 tops down feed bin 3, and down feed bin 3 have can with smash the unloading chamber 31 of chamber 21 intercommunication and with suction hole 33 and the unloading hole 32 of automatic feeding device 4 intercommunication, make the user when using food preparation machine, breathe in through automatic feeding device 4 so that form the negative pressure in unloading chamber 31, and the material in automatic feeding device 4 is inhaled in unloading chamber 31 under the suction effect, after the feeding is accomplished, automatic feeding device 4 stops breathing in and unloading chamber 31 and smash chamber 21 intercommunication so that the material enters into and smashes the chamber 21, accomplish automatic feeding, user's both hands have been liberated, the user need not to be reinforced in smashing chamber 21 from the conduct, food preparation machine's intellectuality and automation have been improved, joyful user uses and has experienced. And through negative pressure material loading to unloading chamber 31 volume is fixed, and then can realize the measurement of material, the accuracy nature of material volume when guaranteeing the material loading, thereby promote the proportion between each batching when eating material processing, improve the taste of output thick liquid.

Simultaneously be equipped with between suction hole 33 and the feed opening 32 and keep off the material structure, when making automatic feeding device 4 breathe in, the material that inhales in the unloading chamber 31 from feed opening 32 can stop to the suction hole 33 under keeping off the blocking of material structure and remove, prevent that it from inhaling in the suction hole 33, thereby effectively avoided the material to inhale lead to the suction hole 33 to breathe in the suction hole 33 not smooth or even blockked up, cause the unable condition of inhaling unloading chamber 31 of material, and then cause the interruption of complete machine edible material processing, guarantee switching on of suction hole 33, improve the stability of complete machine operation.

It should be noted that, the material blocking structure is not specifically limited in the present application, and may be any one of the following embodiments:

example 1: in this embodiment, as shown in fig. 3, the blanking hole 32 and the suction hole 33 are both disposed on the top wall of the blanking chamber 31, and the baffle structure includes a first baffle 34 extending upward from the bottom wall of the blanking chamber 31 to a position between the blanking hole 32 and the suction hole 33.

Through all locating unloading hole 32 and suction hole 33 the roof of unloading chamber 31 for when the material got into unloading chamber 31 through unloading hole 32, the material can also directly fall into unloading chamber 31 with the help of the action of gravity, not only can avoid the material to stop in unloading hole 32, can also improve the speed of unloading, and then shortens to eat the consuming time of material processing. And after the material is sucked into the blanking cavity 31, the material can be accumulated at the bottom of the blanking cavity 31 and stacked upwards along with the increase of the material, and the material blocking structure comprises a first baffle 34 extending upwards from the bottom wall of the blanking cavity 31 to a position between the blanking hole 32 and the air suction hole 33, so that the material can directly collide with the first baffle 34 in the process of moving towards the air suction hole 33, the material can be effectively blocked, and the material is prevented from entering the air suction hole 33.

It should be further noted that, the present application does not specifically limit the structure of the first baffle 34 in this embodiment, and the structure may be any one of the following embodiments:

embodiment 1: as shown in fig. 3, in this embodiment, the material blocking structure further includes a second baffle 35 extending downward from the top wall of the blanking cavity 31 and being offset from the first baffle 34 in the axial direction of the blanking chamber 3, and the second baffle 35 is located between the suction hole 33 and the blanking hole 32.

Set up to still include the second baffle 35 from the axial direction of the roof downwardly extending of unloading chamber 31 and under feed bin 3 misplacing with first baffle 34 through keeping off the material structure, make the material enter into unloading chamber 31 from unloading hole 32 when, if lighter material is directly inhaled to suction hole 33, the material can be directly collided with second baffle 35, realize effectively blockking to the material, further avoid the material to inhale to suction hole 33 in, the cooperation of first baffle 34 and second baffle 35, realized stopping to the all-round of material in unloading chamber 31, prevent that the material from inhaling to suction hole 33.

It should be further noted that, the relative position relationship between the first baffle 34 and the second baffle 35 in this embodiment is not specifically limited in this application, and as a preference of this application, as shown in fig. 3, the first baffle 34 and the second baffle 35 partially overlap in the radial direction of the lower bin 3.

Through setting up first baffle 34 and second baffle 35 to be partial coincidence in the footpath of feed bin 3 down for first baffle 34 and the cooperation of second baffle 35 form certain tortuous labyrinth route between suction hole 33 and unloading hole 32, even the material can pass through first baffle 34, also can prevent it to enter into suction hole 33 under the blockking of second baffle 35, further promoted the effect that blocks of material structure.

Meanwhile, the application does not specifically limit the arrangement of the first baffle 34 and the second baffle 35 in the blanking cavity 31, and as a preference in this embodiment, as shown in fig. 3 and 4, the first baffle 34 is provided in plurality and arranged at intervals along the circumferential direction of the blanking cavity 31.

The first baffle plates 34 are arranged in a plurality of circumferential intervals along the blanking cavity 31, so that the first baffle plates 34 can block materials at a plurality of positions, and the materials at all positions can be effectively blocked to prevent the materials from entering the air suction holes 33.

The second baffle 35 extends downward in the circumferential direction of the blanking hole 32.

Through setting up second baffle 35 to the circumference downwardly extending along unloading hole 32 for second baffle 35 realizes the omnidirectional to blockking to the material of whereabouts in unloading hole 32, further improves the effect that blocks of second baffle 35.

Embodiment 2: in this embodiment, the first baffle 34 extends to abut against the top wall and the side wall of the discharging chamber 31 to divide the discharging chamber 31 into a material storage chamber communicating with the discharging hole 32 and a suction chamber communicating with the suction hole 33, and the first baffle 34 is further provided with a first air vent communicating the material storage chamber and the suction chamber.

Through setting up first baffle 34 to be separated for unloading chamber 31 for the storage chamber with unloading hole 32 intercommunication and with the chamber of breathing in of 33 intercommunication of breathing in, and first baffle 34 still is equipped with the first bleeder vent with storage chamber and the chamber intercommunication of breathing in for unloading chamber 31 realizes functional subregion, promptly: the storage silo realizes storage and unloading of material, and the chamber of breathing in can only breathe in, and when the suction hole 33 breathed in, gas in the storage cavity breathes in to suction hole 33 through first bleeder vent, and the material is stayed in the storage cavity under the blockking of first baffle 34, realizes blockking the all-round of material in the storage cavity.

Example 2: as shown in fig. 5 and 6, in this embodiment, the baffle structure includes a baffle plate 36 covering the air suction hole 33, and the baffle plate 36 is provided with a second air hole 363 for communicating the air suction hole 33 with the blanking cavity 31.

Set up to close striker plate 36 on suction hole 33 including the lid through keeping off the material structure, and striker plate 36 is equipped with the second bleeder vent 363 with suction hole 33 and unloading chamber 31 intercommunication, realize the all-round isolation to suction hole 33 and unloading hole 32, effectively avoided the material to inhale to suction hole 33 in, and do not occupy unloading chamber 31 space, make unloading chamber 31 can save more materials, reduce the number of times of unloading 31 repetition in unloading chamber.

It should be noted that, the formation of the material blocking plate 36 is not specifically limited in the present application, and may be a plate adapted to the air suction hole 33, and a second air vent 363 is formed on the plate, as shown in fig. 6, as a preferred embodiment of the present application, the material blocking plate 36 is formed by cross-connecting a plurality of transverse ribs 361 and longitudinal ribs 362, and the transverse ribs 361 and the longitudinal ribs 362 enclose to form the second air vent 363.

Through setting up striker plate 36 to form by many horizontal muscle 361 and indulge muscle 362 cross connection, horizontal muscle 361 encloses with indulging muscle 362 and closes formation second bleeder vent 363 for the quantity of second bleeder vent 363 can increase, improves the efficiency of breathing in, guarantees that automatic unloader can provide higher negative pressure and then improves unloading efficiency.

Further, as shown in fig. 5 and 6, at least a part of the transverse rib 361 or the longitudinal rib 362 extends toward the blanking chamber 31.

Through setting up at least part of horizontal muscle 361 or indulge muscle 362 and set up to extending towards unloading chamber 31 for the material when moving to suction opening 33, can directly collide with horizontal muscle 361 or indulge muscle 362, realizes blockking to the material, avoids the material to get into and leads to its jam in the second bleeder vent 363.

As a preferred embodiment of the present application, as shown in fig. 1, the automatic feeding device 4 includes a suction device and a material containing chamber for containing material, the suction device is communicated with the suction hole 33 through the suction pipe 6, and the material containing chamber is communicated with the discharging hole 32 through the discharging pipe 5.

Through set up automatic feeding device 4 at automatic feeding device 4 and include getter device and be used for holding the flourishing material chamber of material, and getter device and suction hole 33 pass through breathing pipe 6 intercommunication, and contain material chamber and blanking hole 32 and pass through unloading 5 intercommunication for suction hole 33 breathes in under getter device so that unloading chamber 31 forms the negative pressure, and the material in the flourishing material chamber enters into unloading chamber 31 through unloading 5 under the suction effect simultaneously, accomplishes the transportation of material.

The technical solution protected by the present invention is not limited to the above embodiments, and it should be noted that the technical solution of any one embodiment is combined with the technical solution of one or more other embodiments in the protection scope of the present invention. Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (10)

1. The utility model provides a but food preparation machine of automatic feeding, includes the organism, locates the organism just has the cup and the setting in crushing chamber and is in the motor of cup bottom, by motor drive's pivot runs through the diapire of cup stretches into in the cup, the pivot end is equipped with reducing mechanism, a serial communication port, food preparation machine still includes automatic feeding device and locates the feed bin of cup top, the feed bin down have can with smash the unloading chamber of chamber intercommunication and with suction hole and the feed opening of automatic feeding device intercommunication, the suction hole with be equipped with the dam structure between the feed opening down to prevent that the material from getting into the suction hole.

2. An automatic feeding food processor as claimed in claim 1, wherein the blanking hole and the suction hole are both formed in a top wall of the blanking chamber, and the blocking structure comprises a first blocking plate extending from a bottom wall of the blanking chamber to a position between the blanking hole and the suction hole.

3. An automatically loadable food processor according to claim 2, wherein said dam structure further comprises a second baffle plate extending downwardly from the top wall of said discharge chamber and axially displaced from said first baffle plate in said discharge bin, and said second baffle plate is located between said suction opening and said discharge opening.

4. An automatically loadable food processor according to claim 3, wherein said first baffle plate and said second baffle plate partially coincide in a radial direction of said lower bin.

5. An automatically loadable food processor according to claim 3, characterised in that said first baffle plate is provided in a plurality and spaced apart along the circumference of said discharge chamber and/or,

the second baffle extends downwards along the circumferential direction of the blanking hole.

6. The food processor capable of automatic feeding according to claim 2, wherein the first baffle plate extends to abut against the top wall and the side wall of the feeding cavity to divide the feeding cavity into a storage cavity communicated with the feeding hole and an air suction cavity communicated with the air suction hole, and the first baffle plate is further provided with a first air hole communicating the storage cavity with the air suction cavity.

7. The food processor capable of automatically feeding according to claim 1, wherein the material blocking structure comprises a material blocking plate covering the air suction hole, and the material blocking plate is provided with a second air hole for communicating the air suction hole with the feeding cavity.

8. The food processor capable of automatically feeding according to claim 7, wherein the striker plate is formed by cross-connecting a plurality of transverse ribs and longitudinal ribs, and the transverse ribs and the longitudinal ribs enclose to form the second air holes.

9. An automatically loadable food processor according to claim 8, wherein at least part of said transverse or longitudinal ribs extend towards said blanking cavity.

10. An automatically loadable food processor according to claim 1, wherein said automatic loading means comprises an air suction means and a holding chamber for holding the material, said air suction means being in communication with said air suction opening via an air suction duct and said holding chamber being in communication with said discharge opening via a discharge duct.

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