CN211746884U - Tobacco flake modified atmosphere storage device convenient for later-period oxygen modification - Google Patents
Tobacco flake modified atmosphere storage device convenient for later-period oxygen modification Download PDFInfo
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- CN211746884U CN211746884U CN202020259171.7U CN202020259171U CN211746884U CN 211746884 U CN211746884 U CN 211746884U CN 202020259171 U CN202020259171 U CN 202020259171U CN 211746884 U CN211746884 U CN 211746884U
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Abstract
The utility model provides a piece cigarette gas is transferred storage device convenient to later stage accent oxygen relates to tobacco mellowing and stores technical field. The device provided by the utility model comprises a moisture-proof and breathable film for sealing six sides of the cigarette stack; when in use, the top surface and the periphery of the bottom of the cigarette stack are respectively provided with an atmosphere regulating agent; a tobacco stack frame supported at the periphery of the moisture-proof breathable film; the barrier film covers the outside of the cigarette stack frame and seals six sides of the cigarette stack, and the moisture-proof breathable film and the barrier film are provided with gas exchange interfaces; the multifunctional ventilation dehumidifier is connected with the gas exchange interface; and a liner for supporting the bottom surface of the barrier film. The utility model provides a device can effectively avoid the cigarette buttress to transfer extravagant atmosphere regulation and control agent resource when oxygen operation, produce the dewfall to and easily arouse outside worm source, mould and moisture to get into inside the cigarette buttress, transfer the oxygen operation and consume the manual work, inefficiency, a great deal of problem that the operation quality can't be ensured realizes that the cigarette buttress transfers oxygen operation link quick, safety, stability, high efficiency.
Description
Technical Field
The utility model relates to a tobacco alcoholization stores technical field, in particular to piece cigarette gas is transferred and is stored device convenient to later stage accent oxygen.
Background
Tobacco is one of the important economic crops in China, is an important processing raw material in the cigarette industry, and has great economic value. After the tobacco leaves are harvested and baked, the storage alcoholization time in a natural environment (under certain oxygen concentration and temperature and humidity conditions) needs to be about 2 years for removing green miscellaneous gases of the tobacco leaves, reducing the stimulation of smoking, improving the fragrance quality of smoking, and harmonizing the chemical components in the tobacco leaves. According to incomplete statistics, about 8000 thousands of (1 to 50kg) of baked tobacco leaves in China need to be stored every year.
However, since tobacco leaves are rich in nutrients such as proteins, lipids and saccharides, they are liable to cause vermin during storage. In addition, the humidity of the storage environment is variable, and particularly in southern areas of China, tobacco leaves are easy to mildew due to high temperature and high humidity. At present, each big tobacco plant mainly adopts the mode of aluminium phosphide fumigation in solving the problem of tobacco leaf pest growth, and aluminium phosphide kills insects by contact through decomposing out highly toxic gas phosphine. This approach has at least the following four drawbacks: firstly, the potential safety hazard is huge, aluminum phosphide can react violently when meeting bright water, the aluminum phosphide burns, and the serious aluminum phosphide causes explosion; secondly, the product belongs to a highly toxic substance, and is easy to cause the problems of personnel poisoning, environmental pollution and the like; thirdly, the corrosion of storage equipment and various probes is easily caused due to strong metal corrosivity; and fourthly, the drug resistance of pests is continuously enhanced for years, so that the pests are not completely killed, and the eggs of the pests are difficult to kill. On the aspect of solving the problem of tobacco leaf mildew, the tobacco factory mainly controls the mildew by installing temperature and humidity adjusting equipment to adjust the temperature and the humidity of a storehouse, and the mode has the disadvantages of huge installation equipment investment and very high operation and maintenance cost.
In recent years, the controlled atmosphere storage technology is gradually accepted in the tobacco field, and the controlled atmosphere storage technology achieves the purposes of controlling pests and mildew and maintaining the quality of stored goods by mainly adding an atmosphere control agent, reducing the oxygen concentration in a closed storage space by a chemical or physical method, increasing the carbon dioxide concentration and balancing the relative humidity, and changing the gas components in the storage environment. At present, the modified atmosphere storage mainly adopts a device for sealing a tobacco stack by adopting a single-layer sealing film cover, when the device is used, a gas regulator is intensively placed at the top of the tobacco stack, the oxygen concentration of a closed space is reduced to be below 2%, the insect condition of tobacco leaves is thoroughly prevented and controlled in about 2-3 months, and then the oxygen concentration of the closed space is increased back to a target range by adopting a mode of manually cutting a port or opening an oxygen regulating valve at the later stage of modified atmosphere storage of the tobacco sheets. During the practice of the modified atmosphere storage and maintenance of the tobacco flakes, the oxygen regulating mode at least has the following defects:
(1) because the atmosphere regulating agent is put at the top position, in order to reduce the oxygen concentration in the tobacco stack to be less than 2% within a specified time period (within 45d), the amount of the atmosphere regulating agent which is put in is about 2 times of the theoretical amount of the atmosphere regulating agent, namely 2kg of the atmosphere regulating agent needs to be put in each cubic space. When the external air is communicated to raise oxygen again in a mouth shearing mode or an oxygen regulating valve opening mode, the residual atmosphere regulating agent in the tobacco stack reacts with oxygen in the external air entering the tobacco stack again, so that on one hand, resource waste of the atmosphere regulating agent is caused, on the other hand, after the atmosphere regulating agent reacts with the oxygen to generate heat, extra water vapor is generated and is diffused into the tobacco stack, the relative humidity in the stack is increased, and the risk of moisture absorption and mildew of tobacco leaves is increased, on the other hand, the residual atmosphere regulating agent can continuously consume the oxygen in the air entering the tobacco stack, so that the oxygen concentration in the initial stage of oxygen raising fluctuates repeatedly, a large amount of labor is consumed, and the stability of the tobacco leaf quality is not facilitated;
(2) when oxygen is raised again in a cut mode or an oxygen regulating valve opening mode, external moisture, insect sources and mould outside the stack are particularly easy to bring into the tobacco stack, so that the deterioration risks of moisture absorption, insect generation and mould generation of tobacco leaves are caused; in addition, when the size of the cut or the caliber of the oxygen regulating valve is too small, the oxygen rising efficiency in the tobacco stack is difficult to meet the requirement due to slow air convection in the storehouse;
(3) in the tobacco mellowing process, oxygen is required to participate in the reaction, namely, the oxygen concentration of the tobacco stack is gradually reduced, when the oxygen concentration is reduced to a proper oxygen concentration range (generally 6-10%) which is separated from tobacco mellowing, the mouth is cut again or the oxygen regulating valve is opened to enable the oxygen concentration to be increased to a proper target range again, and the method that the mouth is cut or the oxygen regulating valve is manually opened and closed repeatedly in the tobacco mellowing process involves a large amount of manpower, increases the labor cost in the maintenance service process, and greatly reduces the efficiency and quality of oxygen regulating operation.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a tobacco flake modified atmosphere storage device convenient for later oxygen modification. The utility model provides a device extravagant atmosphere regulation and control agent resource when can effectively avoiding the oxygen operation of cigarette buttress transfer, produce the dewfall to and easily arouse external worm source, mould and moisture to get into the inside influence tobacco leaf quality of cigarette buttress, transfer the oxygen operation and consume the manual work, inefficiency, a great deal of problem that the operation quality can't be ensured realizes that the oxygen operation link is quick, safe, stable, high-efficient for the cigarette buttress.
In order to realize the purpose of the utility model, the utility model provides a following technical scheme:
the utility model provides a piece cigarette gas is transferred storage device convenient to later stage accent oxygen, include:
a moisture-proof and breathable film 3 for sealing six sides of the cigarette stack 1; the moisture-proof breathable film 3 is provided with a first gas exchange interface; when in use, the atmosphere regulating agents 2 are respectively arranged on the top surface and the periphery of the bottom of the cigarette stack 1;
a tobacco stack frame 4 supported at the periphery of the moisture-proof and breathable film 3;
the barrier film 5 is coated outside the cigarette stack frame 4 and seals six surfaces of the cigarette stack 1; a second gas exchange interface is arranged on the barrier film 5; the second gas exchange interface is communicated with the first gas exchange interface;
the multifunctional ventilation dehumidifier 6 is connected with the first gas exchange interface and the second gas exchange interface;
and a pad 7 for supporting the bottom surface of the barrier film 5.
Preferably, the moisture proof and breathable film 3 is a low density polyethylene film, a linear low density polyethylene film or an ethylene-vinyl acetate copolymer film.
Preferably, the thickness of the moisture-proof breathable film 3 is 3-8 threads.
Preferably, the material of the cigarette stack frame 4 is stainless steel.
Preferably, the length, width and height of the cigarette stack frame 4 are respectively 10cm larger than those of the cigarette stack 1.
Preferably, the barrier film 5 is a PE-PA composite film.
Preferably, the thickness of the barrier film 5 is 5-12 filaments.
Preferably, the diameters of the first gas exchange interface and the first gas exchange interface are 45-50 mm.
The utility model provides a tobacco lamina modified atmosphere storage device convenient for later-stage oxygen regulation, on one hand, the device provided by the utility model is a double-layer thin film sealing structure consisting of a moisture-proof breathable film and a barrier film, so that external moisture, insect sources and mould can be prevented from entering the interior of a tobacco stack through the inner-layer moisture-proof breathable film when tobacco leaves are alcoholized, and the deterioration risk of moisture absorption, insect growth and mould growth of tobacco lamina is avoided; secondly, with the help of the certain oxygen permeability of this dampproofing ventilated membrane and certain oxygen consumption rate when the inside tobacco leaf of tobacco pile alcoholizes, can form the inside and outside oxygen concentration dynamic balance of a tobacco pile, external air passes through this dampproofing ventilated membrane and constantly permeates the oxygen molecule promptly, increase the oxygen concentration in the tobacco pile, and simultaneously, the tobacco leaf self in the tobacco pile alcoholizes constantly and consumes the oxygen molecule, reduce the oxygen concentration in the tobacco pile, through the effect of above-mentioned oxygen concentration "rise one drop", the oxygen concentration in having realized the tobacco pile independently stabilizes at required target interval, effectively avoided carrying out the operation of artifical reoxygenation to the tobacco pile repeatedly, can save a large amount of manpowers, financial resources, and can improve oxygen regulation operating efficiency and quality by a wide margin.
On the other hand, the device provided by the utility model has placed atmosphere control agent with the top surface around the tobacco pile bottom when using, and atmosphere control agent so sets up the contact reaction efficiency that can show oxygen in the air in the increase tobacco pile and atmosphere control agent, promotes the speed of falling oxygen by a wide margin, can reduce about two fifths atmosphere control agent input volume (the proportion is put in to the air conditioner at general tobacco pile top is 2kg/m3) The use amount of the atmosphere control agent is reduced by two fifths, the atmosphere control agent basically completely reacts when the oxygen concentration in the cigarette stack is consumed, and the influence on the oxygen entering the cigarette stack in the oxygen regulation initial stage is small, so that the oxygen return operation frequency in the oxygen regulation initial stage is greatly reduced; the atmosphere regulating agent is placed above and below the tobacco stack, so that heat generated by reaction is timely dispersed nearby, the generation of a dew phenomenon is avoided, and the risk of mildew of tobacco leaves is reduced;
to sum up, the utility model provides a device can effectively avoid extravagant atmosphere regulation and control agent resource, production dewfall when the oxygen operation is transferred to the cigarette buttress to and easily arouse external worm source, mould and moisture to get into the inside influence tobacco leaf quality of cigarette buttress, transfer the oxygen operation and consume the manual work, inefficiency, a great deal of problem that the operation quality can't be ensured realizes that the cigarette buttress transfers oxygen operation link quick, safety, stability, high-efficient.
Drawings
FIG. 1 is a schematic view of the three-dimensional structure of the controlled atmosphere slice tobacco storage device for later oxygen regulation;
FIG. 2 is a schematic cross-sectional view of the controlled atmosphere slice tobacco storage device for later oxygen adjustment according to the present invention;
in the figures 1-2, 1-tobacco stack, 2-atmosphere regulator, 3-moisture-proof and breathable film, 4-tobacco stack frame, 5-barrier film, 6-multifunctional ventilation dehumidifier and 7-liner.
Detailed Description
The utility model provides a piece cigarette gas is transferred storage device convenient to later stage accent oxygen, include:
a moisture-proof and breathable film 3 for sealing six sides of the cigarette stack 1; the moisture-proof breathable film 3 is provided with a first gas exchange interface; when in use, the atmosphere regulating agents 2 are respectively arranged on the top surface and the periphery of the bottom of the cigarette stack 1;
a tobacco stack frame 4 supported at the periphery of the moisture-proof and breathable film 3;
the barrier film 5 is coated outside the cigarette stack frame 4 and seals six surfaces of the cigarette stack 1; a second gas exchange interface is arranged on the barrier film 5; the second gas exchange interface is communicated with the first gas exchange interface;
the multifunctional ventilation dehumidifier 6 is connected with the first gas exchange interface and the second gas exchange interface;
and a pad 7 for supporting the bottom surface of the barrier film 5.
The device provided by the utility model comprises a moisture-proof and breathable film 3 for sealing six surfaces of a cigarette stack 1; and a first gas exchange interface is arranged on the moisture-proof breathable film 3. The utility model has no special requirements for the size of the tobacco stack, and can be used for the tobacco stack of any size. In the utility model, the moisture-proof and breathable film 3 is a film with strong moisture barrier capability and weak oxygen barrier capability; the oxygen transmission rate of the moisture-proof and breathable film 3 is preferably 5000-10000 mL/24 h.m20.1 MPa; the thickness of the moisture-proof breathable film 3 is preferably 3-8 threads, and more preferably 5-6 threads. In the present invention, the moisture-proof and breathable film 3 is preferably a low-density polyethylene film, a linear low-density polyethylene film, or an ethylene-vinyl acetate copolymer film. The source of the moisture-proof and breathable film 3 of the present invention is not particularly limited, and commercially available products known to those skilled in the art may be used. The utility model discloses there is not special requirement to the size of dampproofing ventilated membrane 3, and its size can be realized 1 cigarette buttressSix surfaces are sealed. The utility model discloses in, first gas exchange interface is preferred to be set up in the region that dampproofing ventilated membrane 3 is located buttress position bottom, the diameter of first gas exchange interface is preferred 45 ~ 50 mm.
When in use, the atmosphere regulating agents 2 are respectively arranged on the top surface and the periphery of the bottom of the cigarette stack 1. The utility model has no special requirements for the specific type of the atmosphere regulating agent, and can adopt the atmosphere regulating agent well known by the technical personnel in the field, such as an iron-based deoxidant. In the utility model, the adding amount of the atmosphere control agent is 1.2-1.5 kg/m3The preferred ratio of the atmosphere control agent to the atmosphere control agent is 1: 2. The utility model discloses put in atmosphere control agent from top to bottom the cigarette buttress, atmosphere control agent so set up can show the contact reaction efficiency who increases oxygen in the buttress air and atmosphere control agent, promote the speed of falling oxygen by a wide margin, and the reducible atmosphere control agent of about two fifths is put in the volume, also can fall the oxygen concentration in the cigarette buttress to below 2% within the time (45d) of regulation.
The device provided by the utility model comprises a tobacco stack frame 4 which is supported on the periphery of the moisture-proof ventilated membrane 3. In the utility model, the material of the cigarette stack frame 4 is preferably stainless steel; the length, width and height of the cigarette stack frame 4 are preferably 10cm larger than those of the cigarette stack 1 respectively.
The device provided by the utility model comprises a barrier film 5 which is coated outside the cigarette stack frame 4 and seals six surfaces of the cigarette stack 1; and a second gas exchange interface is arranged on the barrier film 5 and communicated with the first gas exchange interface. In the present invention, the barrier film 5 is a thin film that blocks both oxygen and moisture; the thickness of the barrier film 5 is preferably 5-12 threads, and more preferably 7-10 threads. In the present invention, the barrier film 5 is preferably a PE-PA composite film. The utility model has no special requirement on the source of the barrier film 5, and can be made of commercial products known by the technical personnel in the field. The utility model discloses in, the second gas exchange interface is preferred to be set up in the region that barrier film 5 is located the buttress position bottom, the size of second gas exchange interface is preferred to be the same with the size of first gas exchange interface.
The device provided by the utility model include with the multi-functional ventilation dehumidifier 6 that first gas exchange interface and second gas exchange interface are connected. The utility model discloses it is right multi-functional ventilation dehumidifier does not have special requirement, adopt the corresponding equipment that technical personnel in the field are familiar with can.
The device provided by the utility model still includes the bearing the liner 7 of 5 bottom surfaces of barrier film. The present invention has no special requirement for the pad 7, and can adopt pads known to those skilled in the art, specifically pads made of materials such as carton, canvas, agricultural film, etc.
The method for performing later-stage oxygen regulation on the tobacco stack by utilizing the tobacco sheet controlled atmosphere storage device provided by the utility model is optimized as follows:
when the oxygen concentration of the cigarette stack 1 needs to be increased again, dry sterile air is filled into the cigarette stack 1 through the gas exchange interface by using the multifunctional ventilation dehumidifier 6; when the oxygen concentration in the stack 1 rises to the target range value, the inflation is stopped, and then the sealing state of the barrier film 5 is released.
In the utility model, the oxygen concentration (volume concentration) in the tobacco stack in the earlier stage of storage is reduced to below 2 percent, and after maintaining for 2-3 months, the oxygen concentration of the tobacco stack needs to be increased again. The utility model discloses it is right the target range value of oxygen concentration does not have special requirement, according to actual stack alcoholization to the requirement of oxygen concentration set up can, the oxygen concentration (volume concentration) target range value that is suitable for the tobacco alcoholization generally is 6 ~ 10%, consider the stack alcoholization to the consumption of oxygen concentration the utility model discloses in the embodiment, it is preferred regional at the upper limit of target range value with oxygen concentration control, 8 ~ 10% within range promptly.
When the oxygen concentration in the cigarette buttress rises to the target range value, the utility model discloses stop to aerify, then remove the encapsulated situation of outer barrier film, expose the dampproofing ventilated membrane that the inlayer is in encapsulated situation. Because the inner-layer moisture-proof breathable film is in a sealed state, external moisture, insect sources and mould cannot penetrate through the sealing film to enter the tobacco stack, so that the deterioration risks of moisture absorption, insect generation and mould generation of the tobacco flakes are avoided; secondly, with the help of certain oxygen transmission rate of this dampproofing ventilated membrane and certain oxygen consumption rate when tobacco leaf in the tobacco pile alcoholizes, can form a tobacco pile inside and outside oxygen concentration dynamic balance, and the oxygen concentration in the tobacco pile is constantly permeated through this dampproofing ventilated membrane to external air promptly on the one hand, increases the oxygen concentration in the tobacco pile, and on the other hand, constantly consumes the oxygen molecule through the effect of the tobacco leaf self alcoholization in the tobacco pile, reduces the oxygen concentration in the tobacco pile, through the effect of above-mentioned oxygen concentration "rise one fall", realized that the oxygen concentration in the tobacco pile is independently stabilized at required target interval.
The following describes the present invention in detail with reference to the following examples, but they should not be construed as limiting the scope of the present invention.
Example 1
A modified atmosphere storage device for tobacco flakes convenient for later-stage oxygen regulation comprises a tobacco stack, wherein atmosphere control agents are placed on the top surface and the periphery of the bottom of the tobacco stack, and the dosage of the atmosphere control agents is 1.2kg/m3；
A low-density polyethylene film (moisture-proof and breathable film) sealed on six sides of the cigarette stack with the atmosphere control agent, the thickness of the film is 5 filaments, and the oxygen transmission rate is 5000mL/24 h.m20.1MPa, available from Hangzhou star point packaging materials, Inc.;
the stainless steel cigarette stack frame is supported on the periphery of the low-density polyethylene film, and the length, width and height of the cigarette stack frame are respectively 10cm greater than those of the cigarette stack;
the PE-PA composite film (barrier film) is coated outside the cigarette stack frame and sealed on six sides of the cigarette stack, has the thickness of 8 threads and is purchased from Pacific new material company Limited in the tin-free market; the low-density polyethylene film and the PE-PA composite film are respectively provided with a gas exchange interface;
the multifunctional ventilation dehumidifier is connected with the gas exchange interface;
and a liner for supporting the bottom surface of the PE-PA composite film.
The oxygen concentration (volume concentration) of the tobacco stack closed space is reduced to 1.6% by using the air conditioning agent in the device of the embodiment at the early stage of the controlled atmosphere storage of the tobacco flakes for 42 days.
The method for performing the later-stage oxygen regulation on the tobacco stack by utilizing the device of the embodiment comprises the following steps:
(1) after the oxygen concentration in the sealed cigarette stack is maintained for 60 days, dry and sterile clean air is filled into the cigarette stack through a gas exchange interface arranged on a low-density polyethylene film and a PE-PA composite film by adopting a multifunctional ventilation dehumidifier, when the oxygen concentration in the cigarette stack rises to an upper limit area of a target range (6-10%), the air inflation is stopped, the sealing state of the outermost PE-PA composite film of the cigarette stack is released, the low-density polyethylene film with the inner layer in a sealing state is exposed, and the oxygen concentration value in the cigarette stack is 8.9%;
(2) regularly observing the change of the oxygen concentration inside the sealed tobacco stack, wherein the actual result is that the sealed tobacco stack is stored for 7 days, and the oxygen concentration inside the tobacco stack is 8.5 percent; the storage time is 15 days, the oxygen concentration in the tobacco stack is 8.0 percent, the storage time is 30 days, the oxygen concentration in the tobacco stack is 7.2 percent, the storage time is 60 days, and the oxygen concentration in the tobacco stack is 6.5 percent.
Through the inside oxygen concentration of sealed cigarette buttress that regularly observes, can see for the oxygen mode of conventional transfer approximately need open the oxygen valve again or cut the mouth mode and carry out the oxygen operation of rising again every 7d, adopt the utility model provides a device carries out once and transfers oxygen operation back, can keep the oxygen concentration in the sealed buttress at least 2 months in target range (6 ~ 10%). Moreover, during the storage period of the tobacco stack, no dewing phenomenon, no insect source and no mould are generated in the tobacco stack.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A modified atmosphere storage device for tobacco flakes for facilitating post-conditioning oxygen comprising:
a moisture-proof and breathable film (3) for sealing six sides of the cigarette stack (1); a first gas exchange interface is arranged on the moisture-proof breathable film (3); when in use, the atmosphere regulating agents (2) are respectively placed on the top surface and the periphery of the bottom of the cigarette stack (1);
a cigarette stack frame (4) supported at the periphery of the moisture-proof and breathable film (3);
a barrier film (5) which is coated outside the cigarette stack frame (4) and seals six sides of the cigarette stack (1); a second gas exchange interface is arranged on the barrier film (5); the second gas exchange interface is communicated with the first gas exchange interface;
the multifunctional ventilation dehumidifier (6) is connected with the first gas exchange interface and the second gas exchange interface;
and a pad (7) for supporting the bottom surface of the barrier film (5).
2. Modified atmosphere storage device according to claim 1, wherein the moisture-proof, gas-permeable membrane (3) is a low density polyethylene membrane, a linear low density polyethylene membrane or an ethylene vinyl acetate copolymer membrane.
3. A modified atmosphere chip storage device according to claim 1 or claim 2, wherein the moisture-proof gas-permeable membrane (3) has a thickness of 3 to 8 filaments.
4. Modified atmosphere storage device for tobacco flakes according to claim 1, characterised in that the material of the tobacco stack holder (4) is stainless steel.
5. Modified atmosphere storage device for tobacco flakes according to claim 1 or 4, characterised in that the length, width and height of the tobacco pile frame (4) are 10cm greater than the length, width and height of the tobacco pile (1), respectively.
6. Modified atmosphere storage device according to claim 1, characterised in that the barrier film (5) is a PE-PA composite film.
7. The modified atmosphere storage device of claim 1 or claim 6, wherein the barrier film (5) has a thickness of 5 to 12 filaments.
8. The modified atmosphere chip storage device of claim 1, wherein the first gas exchange port and the first gas exchange port have a diameter of 45 to 50 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020259171.7U CN211746884U (en) | 2020-03-05 | 2020-03-05 | Tobacco flake modified atmosphere storage device convenient for later-period oxygen modification |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020259171.7U CN211746884U (en) | 2020-03-05 | 2020-03-05 | Tobacco flake modified atmosphere storage device convenient for later-period oxygen modification |
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| CN211746884U true CN211746884U (en) | 2020-10-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114557473A (en) * | 2022-04-01 | 2022-05-31 | 湖北中烟工业有限责任公司 | Stacking double-layer closed maintenance system for accelerating tobacco mellowing and construction and use method thereof |
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2020
- 2020-03-05 CN CN202020259171.7U patent/CN211746884U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114557473A (en) * | 2022-04-01 | 2022-05-31 | 湖北中烟工业有限责任公司 | Stacking double-layer closed maintenance system for accelerating tobacco mellowing and construction and use method thereof |
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