CN215157466U

CN215157466U - Vacuum fresh-keeping mechanism and material storage device

Info

Publication number: CN215157466U
Application number: CN202023083981.0U
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhongshan Ruimi Intelligent Technology Co ltd
Current assignee: Zhongshan Ruimi Intelligent Technology Co ltd
Priority date: 2020-12-20
Filing date: 2020-12-20
Publication date: 2021-12-14
Anticipated expiration: 2030-12-20

Abstract

The utility model belongs to the field of storage devices, and provides a vacuum fresh-keeping mechanism and a storage device, which comprises a storage bin, a material distribution structure, a discharge pipe, a vacuum pump and a sealing cover, wherein the material distribution structure is arranged at the bottom of the storage bin and is communicated with the bottom of the storage bin; because the air hole is formed in the side wall of the discharge pipe, the material distributing structure stops transferring materials before the sealed cavity is vacuumized, and then the sealing cover is blocked, so that no materials are retained in the discharge pipe, and the materials in the storage bin cannot enter a pipeline of the vacuum pump, and the vacuumizing of the materials in the sealed cavity cannot be influenced; moreover, the air holes are formed in the discharge pipe, so that the vacuum pump is convenient to wire and is compact and novel in internal structure.

Description

Vacuum fresh-keeping mechanism and material storage device

Technical Field

The utility model belongs to the technical field of storage device, especially, relate to a vacuum fresh-keeping mechanism and material storage device.

Background

In the process of storing some food materials or other special materials, various adverse factors (such as air, humidity and the like) in the environment often affect the food materials or other special materials, so that the oxidation and the deterioration are easily accelerated. In order to ensure the shelf life of food materials or special materials, the storage devices are generally sealed and evacuated.

In order to prevent that in the evacuation processing process edible material or material from getting into the vacuum pipeline, often need set up the extraction opening of air exhaust device at storage device's top, but this kind has the not good problem of accomodating of circuit and the air exhaust device itself of connecting air exhaust device again in the design, seriously influences the outward appearance of product moreover.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned prior art not enough, provide a vacuum fresh-keeping mechanism and use its device to it is unreasonable to solve evacuating device setting position among the prior art, and the circuit is not good to be accomodate the problem of overall arrangement.

The utility model is realized in such a way, the utility model provides a vacuum fresh-keeping mechanism, which comprises a storage bin for hermetically storing granular materials, and also comprises a material distribution structure, a discharge pipe, a vacuum pump and a sealing cover, wherein the material distribution structure is arranged at the bottom of the storage bin and is communicated with the bottom of the storage bin, and the material distribution structure allows air flow to circulate between the storage bin and the discharge pipe;

a sealed cavity is formed among the stock bin, the material distribution structure and the discharge pipe, the sealed cover is used for plugging the discharge pipe is far away from an opening at one end of the material distribution structure so as to seal the sealed cavity, and the discharge pipe is communicated with the vacuum pump.

Specifically, the side wall of the discharge pipe is provided with an air hole which is communicated with the inside and the outside, and the air hole is communicated with the vacuum pump; the air hole is arranged towards the opening inside the discharging pipe towards the horizontal direction or the inclined downward direction. Further, the air hole is communicated with a three-way pipe, and three ports of the three-way pipe are respectively communicated with the air hole, the vacuum pump and a pressure release valve; the air hole and the three-way pipe; or/and between the three-way pipe and the vacuum pump or/and; and a pressure sensor is arranged between the three-way pipe and the pressure release valve.

Further, the material distribution structure is a quantitative material distribution structure; the quantitative material distributing structure comprises:

the discharging pipe is arranged at the bottom of the shell and is communicated with the first containing cavity;

the material distributing part is movably arranged in the first containing cavity, and a second containing cavity which can be communicated with the material inlet or the material outlet pipe is formed in the material distributing part;

the driver is used for driving the material distributing part to move, is arranged on the shell and is connected with the material distributing part;

when the material distributing part moves to the second containing cavity and is communicated with the material inlet, the second containing cavity is separated from the material discharging pipe; when the material distributing part moves to the second containing cavity and is communicated with the material discharging pipe, the second containing cavity is separated from the material inlet.

Furthermore, the shell comprises a cylinder, a first end plate arranged at one end of the cylinder and a second end plate covered with the other end of the cylinder, the first end plate, the cylinder and the second end plate enclose a cylindrical first containing cavity, the first end plate is provided with the discharge pipe, and the second end plate is provided with the feeding port; in the axial direction of the cylinder: the projection of the feeding port and the projection of the discharging pipe are arranged in a staggered manner; two ends of the second cavity penetrate through the material distributing part.

Furthermore, the material distributing part is cylindrical, and the material distributing part is rotatably arranged in the cylindrical first containing cavity;

the driver is a rotating motor or a rotating cylinder, and a rotating shaft of the driver penetrates through the first end plate and extends into the first containing cavity to be connected with the material distributing component; and a sealing element is arranged between the rotating shaft of the driver and the first end plate.

Further, the bin comprises a bin body with a hollow interior, a bin cover is arranged on the upper end cover of the bin body, and the bin body is in sealing fit with the bin cover;

the lower end of the bin body is communicated with the first containing cavity, the lower end of the bin body is integrally formed or in sealing fit with the cylinder, the cylinder is integrally formed or in sealing fit with the first end plate, and the first end plate is integrally formed or in sealing fit with the discharge pipe;

the bin body is internally provided with a detector for detecting whether the materials are sufficient, and the detector is an infrared inductor.

Furthermore, the number of the second cavities is more than two, and the driver drives the material distributing part to move periodically so that the second cavities are communicated with the material inlet or the material outlet in a circulating manner; the second end plate can at least completely shield one side of any two adjacent second cavities facing the second end plate;

the size of the cross section of the second cavity is in uniform transition from one side of the second cavity to the other side of the second cavity, or in gradual transition, or in uniform transition and then in gradual transition.

Further, the second end plate is arranged in a gradient manner; and the height of one side, close to the feeding port, of the second end plate is lower than the height of one side, far away from the feeding port, of the second end plate.

The embodiment of the utility model provides a material storage device is still provided, it includes as before the fresh-keeping mechanism of vacuum.

In the embodiment of the utility model, the vacuum pump carries out evacuation to the sealed cavity through the gas pocket that communicates with it, because the gas pocket sets up on the lateral wall of discharging pipe, before carrying out evacuation to the sealed cavity, divide the material structure to stop shifting the material earlier, realize the air intercommunication through the clearance between the material and the clearance of dividing the material structure between feed bin, divide material structure and the discharging pipe, then the sealed lid blocks up again, there is not the material to be detained in the discharging pipe like this, the feed bin material can not get into the pipeline of vacuum pump like this, can not cause the influence to the material evacuation in the sealed cavity promptly; moreover, the vacuum component is integrally arranged at the bottom of the accommodating cavity, so that the wiring layout of the vacuum pump is facilitated, and the internal structure is compact and novel.

Drawings

Fig. 1 is a sectional view of a vacuum refreshing mechanism provided in an embodiment of the present invention;

fig. 2 is a perspective view of a vacuum fresh-keeping mechanism provided by the embodiment of the present invention;

fig. 3 is a cross-sectional view of a material distributing structure in the vacuum fresh-keeping mechanism provided by the embodiment of the present invention;

fig. 4 is an exploded view of a material distributing structure in the vacuum fresh-keeping mechanism provided by the embodiment of the present invention;

1-a vacuum fresh-keeping mechanism; 1 a-a material distributing structure; 1 b-a storage bin; 10-a housing; 11-a first cavity; 12-a feeding port; 13-a discharge pipe; 14-pores; 15-a three-way pipe; 16-a pressure relief valve; 17-a cabin body; 18-bin cover; 100-cylinder; 101-a first end plate; 102-a second end plate; 2-a material separating part; 21-a second cavity; 3-a driver; 31-a seal; 4-sealing cover; 5-vacuum pump.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in fig. 1 to 4, the vacuum refreshing mechanism 1 provided in the embodiment of the present invention includes a storage bin 1b for storing granular materials (hereinafter, briefly described as materials), and further includes a material distributing structure 1a, a discharging pipe 13, a vacuum pump 5 and a sealing cover 4, the material distributing structure 1a is disposed at the bottom of the storage bin 1b and is communicated with the bottom of the storage bin 1b, the discharging pipe 13 is communicated with the bottom of the material distributing structure 1a, and the material distributing structure 1a allows air flow to circulate between the storage bin 1b and the discharging pipe 13;

a sealed cavity is formed among the stock bin 1b, the material distributing structure 1a and the discharging pipe 13, the sealing cover 4 is used for blocking an opening of one end, far away from the material distributing structure 1a, of the discharging pipe 13 so as to seal the sealed cavity, and the discharging pipe 13 is communicated with the vacuum pump 5.

In this embodiment, the air flow mainly refers to air, and a gap allowing the air flow to circulate between the storage bin 1b and the discharge pipe 13 is arranged inside the material distribution structure 1a, and the gap is smaller than the size of material particles.

In this embodiment, the storage bin 1b is used for storing materials, the material distributing structure 1a is used for transferring the materials to the material discharging pipe 13, the material discharging pipe 13 is used for receiving and transferring the materials transported by the material distributing structure 1a, the material discharging pipe 13 can limit the falling position and direction of the materials, so that a special material box is arranged below the material discharging pipe 13 for receiving the materials, the sealing cover 4 is a cover body, a sealing cover or a sealing plug with sealing performance, the sealing cover 4 is used for blocking the material discharging pipe 13 after the material distributing structure 1a stops transferring the materials to the material discharging pipe 13, and meanwhile, a sealing cavity with internal communication is formed between the storage bin 1b, the material distributing structure 1a and the material discharging pipe 13, so that the vacuum pump 5 communicated with the air hole 14 on the side wall of the material discharging pipe 13 can be used for vacuumizing the sealing cavity, thereby ensuring that the sealing cavity is in a vacuum state and being beneficial to prolonging the storage time of the materials in the storage bin 1b, the effect of keeping the materials in the storage bin 1b fresh is achieved.

The air hole 14 is arranged on the side wall of the discharge pipe 13, the air hole 14 cannot be blocked in the falling process of the material, and when the vacuum pumping is performed, although the material distributing structure 1a stops transferring the material to the discharge pipe 13, because a sealed cavity with internal communication is formed among the bin 1b, the material distributing structure 1a and the discharge pipe 13, the material distributing structure 1a is only used for transferring the material to the discharge pipe 13 or stopping transferring the material, the material distributing structure 1a does not obstruct the communication between the bin 1b and the discharge pipe 13, and a gap allowing the communication between the bin 1b and the discharge pipe 13 is arranged in the material distributing structure 1a, so that the air can smoothly pass through the material distributing structure 1a, the gap is smaller than the size of material particles, the material can be prevented from being retained in the gap and cannot be discharged, the material in the bin 1b is the particle material, and the air can smoothly pass through the gap of the particle material under the action of pressure, therefore, the air in the sealing cavity is conveniently pumped by the vacuum pump 5, so as to meet the purpose of vacuum preservation; meanwhile, when the sealing cover 4 or a later-described relief valve 16 is opened, external air can enter the sealing cavity under the action of atmospheric pressure, so that the pressure relief function is smoothly realized.

In the embodiment of the utility model, vacuum pump 5 carries out evacuation to sealed chamber through the gas pocket 14 that communicates with it, because the gas pocket sets up on the lateral wall of discharging pipe, before carrying out evacuation to sealed chamber, divide material structure 1a to stop shifting the material earlier, feed bin 1b, divide between material structure 1a and the discharging pipe 13 to realize the air intercommunication through the clearance between the material and the clearance of dividing material structure 1a, then sealed lid 4 blocks up again, there is not the material to be detained in discharging pipe 13 like this, feed bin 1b material can not get into the pipeline of vacuum pump 5 like this, can not cause the influence to the material evacuation in the sealed chamber promptly; moreover, the vacuum components are integrally arranged at the bottom of the accommodating cavity, so that the wiring layout of the vacuum pump 5 is convenient, and the internal structure is compact and novel.

Further, offer inside and outside air vent 14 that link up on the lateral wall of discharging pipe 13, air vent 14 and vacuum pump 5 intercommunication, air vent 14 sets up towards the inside opening of discharging pipe 13 horizontal direction or the decurrent direction of slope, no matter how discharging pipe 13 sets up like this, the material can not the inlet port 14 that drops to avoid the material to block up air vent 14 or vacuum pump 5, thereby be favorable to guaranteeing that vacuum pump 5 normally works.

Further, the air hole 14 is communicated with a three-way pipe 15, and three ports of the three-way pipe 15 are respectively communicated with the air hole 14, the vacuum pump 5 and a pressure release valve 16; between the air hole 14 and the three-way pipe 15; or/and between the three-way pipe 15 and the vacuum pump 5; or/and, a pressure sensor is arranged between the three-way pipe 15 and the pressure release valve 16, the pressure release valve 16 can be used for opening the sealing cover 4 before the sealing cover is opened when the material is taken, so that the outside air is communicated with the inside of the sealing cavity, thereby facilitating the pressure release in the sealing cavity, reducing the negative pressure in the sealing cavity, facilitating the smooth opening of the sealing cover 4, and when the vacuum is pumped, the pressure release valve 16 and the sealing cover 4 are both closed, thereby separating the sealing cavity from the outside air, thereby facilitating the gas in the sealing cavity to be pumped by the vacuum pump 5, facilitating the vacuum state in the sealing cavity, thereby facilitating the storage of the material, the pressure release valve 16 can be driven by an electromagnet or other feasible modes, as long as the three-way pipe 15 and the interface communicated with the three-way pipe can be controlled to be opened or closed according to the requirements, and detailed description is not provided herein; the pressure sensor is used for detecting the gas pressure in the sealed cavity, so that the vacuum pump 5 can be controlled to work or stop according to the gas pressure state in the sealed cavity.

Further, the material distributing structure 1a is a quantitative material distributing structure 1 a; the quantitative material distributing structure 1a comprises:

the device comprises a shell 10, wherein a first containing cavity 11 is formed in the shell 10, a feeding hole 12 communicated with the first containing cavity 11 is formed in the top of the shell 10, a discharging pipe 13 is arranged at the bottom of the shell 10, and the discharging pipe 13 is communicated with the first containing cavity 11;

the material distributing part 2 is movably arranged in the first containing cavity 11, and a second containing cavity 21 which can be communicated with the material inlet 12 or the material outlet 13 is formed in the material distributing part 2;

the driver 3 is used for driving the material distributing part 2 to move, the driver 3 is arranged on the shell 10, and the driver 3 is connected with the material distributing part 2;

when the material distributing part 2 moves to the second containing cavity 21 to be communicated with the material inlet 12, the second containing cavity 21 is separated from the material outlet pipe 13; when the material distributing part 2 moves to the second containing cavity 21 to be communicated with the material outlet pipe 13, the second containing cavity 21 is separated from the material inlet 12; the partition is also in a non-communicating state between the second volume chamber 21 and the inlet 12 or the outlet 13, or the side of the second volume chamber 21 that is in communication with the inlet 12 or the side that is in communication with the outlet 13 is in a closed/closed state.

In this embodiment, when the second cavity 21 is communicated with the material inlet 12, the second cavity 21 is isolated from the material outlet pipe 13, when the second cavity 21 is communicated with the material outlet pipe 13, the second cavity 21 is isolated from the material inlet 12, that is, the second cavity 21 can only be communicated with the material inlet 12 or communicated with the material outlet pipe 13 alone during the movement of the second cavity 21 driven by the driver 3, so that when the second cavity 21 is communicated with the material inlet 12 to receive the material above the material inlet 12, the second cavity 21 is an open side for communicating with the material inlet 12 and a closed side for communicating with the material outlet pipe 13, the second cavity 21 can only receive the material with the corresponding weight of the volume from the material inlet 12, after the second cavity 21 is filled with the material, the second cavity 21 is moved to the position where the second cavity 21 is communicated with the material outlet pipe 13 under the driving of the driver 3, at this time, the second cavity 21 is used for being closed on one side of the material inlet 12 and open side for communicating with the material outlet pipe 13, the material in the second containing cavity 21 is discharged from the discharging pipe 13, because the second containing cavity 21 is used for sealing one side communicated with the feeding port 12, the material at the position of the feeding port 12 cannot enter the second containing cavity 21 communicated with the discharging pipe 13, so that the material component discharged from the discharging pipe 13 from the second containing cavity 21 at each time is equal to the material component received from one side of the feeding port 12 from the second containing cavity 21 at each time, namely equal to the volume of the second containing cavity 21, thereby realizing the functions of quantitative material taking and discharging, thus realizing quantitative material taking without the help of a weighing device, and having simple structure and convenient installation, and being applied to various devices or equipment, such as various material storing devices or food processing equipment.

Further, the housing 10 includes a cylinder 100, a first end plate 101 disposed at one end of the cylinder 100, and a second end plate 102 covering the other end of the cylinder 100, the first end plate 101, the cylinder 100, and the second end plate 102 enclose a cylindrical first cavity 11, a discharge pipe 13 is disposed on the first end plate 101, and a feeding port 12 is disposed on the second end plate 102; in the axial direction of the cylinder 100: the projection of the feeding port 12 and the projection of the discharging pipe 13 are arranged in a staggered manner; both ends of the second cavity 21 penetrate through the material-distributing part 2.

The first end plate 101, the cylinder 100 and the second end plate 102 limit the material distribution part 2 in the material distribution part, materials can only enter the material distribution part 2 from the material inlet 12, and the driver 3 drives the material distribution part 2 to transfer the materials to the second containing cavity 21 to be separated from the material inlet 12, and the second containing cavity 21 is communicated with the material outlet 13, so that quantitative filling and discharging are ensured, and a quantitative material taking function is realized.

Further, the bin 1b comprises a bin body 17 with a hollow inner part, a bin cover 18 is arranged on the upper end cover of the bin body 17, and the bin cover 18 and the bin cover 17 are in sealing fit, so that the bin cover 18 can be opened according to actual needs to be conveniently filled with materials, and meanwhile, the sealing performance of a sealing cavity can be ensured;

the lower end of the bin body 17 is communicated with the first containing cavity 11, the lower end of the bin body 17 is integrally formed or in sealing fit with the cylinder 100, the cylinder 100 is integrally formed or in sealing fit with the first end plate 101, and the first end plate 101 is integrally formed or in sealing fit with the discharge pipe 13, so that the sealing performance of the sealed cavity is guaranteed;

in this embodiment, the lower end of the bin 17 and the cylinder 100 are integrally formed, the cylinder 100 and the first end plate 101 are integrally formed, and the first end plate 101 and the discharge pipe 13 are integrally formed, so that the processing is convenient, and the sealing performance of the whole vacuum refreshing mechanism 1 is increased.

A detector for detecting whether the materials are sufficient is arranged in the bin body 17, and the detector is an infrared sensor; the detector is convenient for detect how much of material in feed bin 1b, is convenient for in time pack the material to feed bin 1b according to actual conditions.

Further, the material distributing part 2 is cylindrical, and the material distributing part 2 is rotatably arranged in the cylindrical first containing cavity 11;

the driver 3 is a rotating motor or a rotating cylinder, and a rotating shaft of the driver 3 penetrates through the first end plate 101 and extends into the first containing cavity 11 to be connected with the material distributing component 2; the sealing element 31 is arranged between the rotating shaft of the driver 3 and the first end plate 101, the cylindrical material distributing part 2 is high in material distributing efficiency and convenient to control in a rotating motion mode, and the sealing element 31 is favorable for guaranteeing the sealing performance of the sealing cavity.

Further, the number of the second cavities 21 is more than two, and the driver 3 drives the material distributing part 2 to move periodically so that the second cavities 21 are communicated with the material inlet 12 or the material outlet 13 in a circulating manner; the second end plate 102 can completely block at least one side of any two adjacent second cavities 21 facing the second end plate 102;

in this embodiment, the periodic movement mainly means that the second cavity 21 circumferentially moves along with the rotation of the material distribution part 2 by taking the rotating shaft of the driver 3 as a center, in other embodiments, the material distribution part 2 can also periodically move in a closed loop other than a circle under the driving of the driver 3, so that the second cavity 21 can also have the functions of circularly taking and discharging materials, and the description is omitted; second end plate 102 can shelter from any two adjacent second appearance chambeies 21 towards one side of second end plate 102 simultaneously completely at least, can guarantee like this that divide material part 2 along with driver 3 periodic movement in-process, second appearance chamber 21 with discharging pipe 13 gradually communicate with gradually the in-process of separating gradually, second end plate 102 shelters from second appearance chamber 21 all the time to avoid the in-process of unloading, pan feeding mouth 12 and the second appearance chamber 21 intercommunication of unloading, thereby can't realize the ration and get the material function.

Specifically, in this embodiment, the size of the cross section of the second cavity 21 is uniformly transitioned from one side of the second cavity 21 to the other side, and in other embodiments, the size of the cross section of the second cavity 21 may be gradually transitioned from one side of the second cavity 21 to the other side, or may be gradually transitioned after being uniform, or may be transitioned at irregular rate, as long as the filling and discharging of the second cavity 21 are not affected, and this is not particularly limited.

Specifically, the second end plate 102 is disposed at a slope; and the height that second end plate 102 is close to pan feeding mouth 12 one side is less than the height that second end plate 102 keeps away from pan feeding mouth 12 one side so be favorable to letting the material of pan feeding mouth 12 top all drop to pan feeding mouth 12 position smoothly, avoid a small amount of material to gather in the position that can't get into pan feeding mouth 12 on second end plate 102 for a long time, and exceed its effective shelf life, thereby influence the save of other materials above second end plate 102, especially be convenient for here to some and eat the save of material, if eat material class material and stagnate on second end plate 102 for a long time, probably go bad and corruption takes place, thereby influence the shelf life and the new freshness of other edible materials, just can solve this problem well after setting up through letting second end plate 102 be the slope.

The embodiment of the utility model provides a material storage device is still provided, it includes foretell vacuum fresh-keeping mechanism 1, therefore possesses all technological effects of above-mentioned vacuum fresh-keeping mechanism 1, and here is not enumerated one by one.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims

1. The vacuum fresh-keeping mechanism comprises a bin for hermetically storing granular materials, and is characterized by further comprising a material distribution structure, a material discharge pipe, a vacuum pump and a sealing cover, wherein the material distribution structure is arranged at the bottom of the bin and is communicated with the bottom of the bin;

2. The vacuum fresh-keeping mechanism according to claim 1, wherein the side wall of the discharging pipe is provided with an air hole which is communicated with the inside and the outside, and the air hole is communicated with the vacuum pump; the air hole is arranged towards the opening inside the discharging pipe towards the horizontal direction or the inclined downward direction.

3. The vacuum fresh-keeping mechanism according to claim 2, wherein the air hole is communicated with a three-way pipe, and three ports of the three-way pipe are respectively communicated with the air hole, the vacuum pump and a pressure relief valve; the air hole and the three-way pipe; or/and between the three-way pipe and the vacuum pump or/and; and a pressure sensor is arranged between the three-way pipe and the pressure release valve.

4. The vacuum refreshing mechanism according to claim 1, wherein the material distributing structure is a quantitative material distributing structure; the quantitative material distributing structure comprises:

5. The vacuum refreshing mechanism according to claim 4, wherein the housing comprises a cylinder, a first end plate arranged at one end of the cylinder, and a second end plate covering the other end of the cylinder, the first end plate, the cylinder and the second end plate enclose a cylindrical first cavity, the first end plate is provided with the discharging pipe, and the second end plate is provided with the feeding port; in the axial direction of the cylinder: the projection of the feeding port and the projection of the discharging pipe are arranged in a staggered manner; two ends of the second cavity penetrate through the material distributing part.

6. The vacuum refreshing mechanism according to claim 5, wherein the material distributing member is cylindrical, and the material distributing member is rotatably disposed in the cylindrical first cavity;

7. The vacuum fresh-keeping mechanism according to claim 5, wherein the bin comprises a bin body with a hollow interior, a bin cover is arranged on the upper end cover of the bin body, and the bin body and the bin cover are in sealing fit;

8. The vacuum refreshing mechanism according to claim 5, wherein the number of the second cavities is more than two, and the driver drives the material distributing part to move periodically to enable the second cavities to be communicated with the material inlet or the material outlet in a circulating manner; the second end plate can at least completely shield one side of any two adjacent second cavities facing the second end plate;

9. The vacuum refreshing mechanism according to any one of claims 5 to 8, wherein the second end plate is arranged in a slope; and the height of one side, close to the feeding port, of the second end plate is lower than the height of one side, far away from the feeding port, of the second end plate.

10. A material storage apparatus comprising a vacuum refreshing mechanism according to any one of claims 1 to 9.