CN111247973B - Grain storage storehouse temperature control system - Google Patents
Grain storage storehouse temperature control system Download PDFInfo
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- CN111247973B CN111247973B CN202010005278.3A CN202010005278A CN111247973B CN 111247973 B CN111247973 B CN 111247973B CN 202010005278 A CN202010005278 A CN 202010005278A CN 111247973 B CN111247973 B CN 111247973B
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
- A01F25/00—Storing agricultural or horticultural produce; Hanging-up harvested fruit
- A01F25/16—Arrangements in forage silos
- A01F25/22—Ventilating arrangements
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Abstract
The invention relates to a grain storage bin, in particular to a temperature control system of the grain storage bin. Grain storage storehouse temperature control system, including setting up the temperature control equipment in storage storehouse one side, temperature control equipment on be connected with out tuber pipe and back flow, go out tuber pipe and back flow and all transversely set up around the inner wall in storage storehouse, go out the interval on the tuber pipe and be provided with the branch play tuber pipe of a plurality of longitudinal extension, the interval is provided with the branch back flow of a plurality of longitudinal extension on the back flow, branch goes out tuber pipe and branch back flow interval distribution. The invention has the advantages of cooling the side close to the sunshine in high-temperature seasons, avoiding overlarge local temperature difference in the storage bin, preventing grains from deteriorating and the like.
Description
Technical Field
The invention relates to a grain storage bin, in particular to a temperature control system of the grain storage bin.
Background
The current grain storage bin is usually concentrated and set up, but interval arrangement each other, the length and width of storage bin leads to constant meter or even tens of meters, the grain height of stacking densely in the storage bin also has four to five meters, leave the headspace that is used for supplying personnel to walk between the topmost that stacks grain and the top in storage bin, lay the step mat at grain topmost, set up the access door on the upper portion in storage bin simultaneously, personnel can enter into this headspace of storage bin upper end through the access door, walk on the step mat and be convenient for maintain the internal plant. The temperature control device is usually an air conditioner which is arranged at the upper part of one side of the storage bin along the wall and realizes temperature control on a reserved space above grains so as to realize temperature control in the storage bin. However, in hot summer in the south, even the wall thickness of the existing storage bin is large and certain heat insulation and moisture prevention are performed, the storage bin is exposed to the sun for a long time towards the illuminated surface, and the outdoor temperature state is continuously kept.
Disclosure of Invention
The invention mainly aims at the problems and provides a temperature control system for a grain storage bin. The invention aims to create a low-temperature environment around and above a granary, so that the temperature of grains around and above the granary is prevented from rising due to the influence of external heat transfer in high-temperature seasons, the grains in the granary are kept at a lower temperature, and the quality preservation of the stored grains is better realized.
The purpose of the invention is mainly realized by the following scheme: the utility model provides a grain storage storehouse temperature control system, is including setting up the temperature control equipment in storage storehouse one side, the temperature control equipment on be connected with out tuber pipe and back flow, go out tuber pipe and back flow and all transversely set up around the inner wall in storage storehouse, go out the interval and be provided with the branch play tuber pipe of a plurality of longitudinal extension on the tuber pipe, the interval is provided with the branch back flow of a plurality of longitudinal extension on the back flow, branch play tuber pipe and branch back flow interval distribution. One side of the storage bin is provided with a temperature control device, the temperature control device can adopt an existing air conditioner or a temperature and humidity controller, the temperature control device is connected with an air outlet pipe and a return pipe, and the air outlet pipe and the return pipe transversely surround the inner wall of the storage bin. The air outlet pipes are provided with the plurality of branch air outlet pipes at intervals, namely, the temperature control equipment conveys cold air along the inner wall of the storage bin through the air outlet pipes and then discharges the cold air along the longitudinal intervals through the branch air outlet pipes, so that the part between every two adjacent branch air outlet pipes can be cooled. Set up a plurality of branch's back flow on the back flow at the interval, and branch back flow and branch play tuber pipe interval distribution, two adjacent branches play tuber pipe and all have a branch back flow promptly between the tuber pipe, branch play tuber pipe exhaust cold wind can be with grain cooling on every side, cold wind flows along the hole between the grain, brings the air that has the heat originally between the grain into the branch back flow, collects to the back flow by the branch back flow again, gets back to the temperature control equipment by the back flow again and discharges outdoor. Temperature control equipment among the whole device not only can be to the headspace cooling of grain top in the storage storehouse, and go out the tuber pipe through the branch of going out tuber pipe and longitudinal arrangement and carry cold wind to the wall body department that is close to storage storehouse inner wall, the grain cooling that is close to the wall in the grain that piles up in the storage storehouse, the air flow in the grain hole that has realized being close to the wall, bring the heat into to the back flow in by temperature control equipment discharges, even outdoor continuous high temperature, the storage storehouse outer wall lasts the sun, still can guarantee the cooling of storage storehouse inner wall department, reduce the difference in temperature of each position in the whole storage storehouse, and then avoid grain rotten.
Preferably, each of the branch air outlet pipe and the branch return pipe comprises an inner pipe and an outer pipe sleeved outside the inner pipe and attached to the outer surface of the inner pipe, through holes for air to flow are densely distributed in the inner pipe, air guide holes integrally connected with the outer pipe are densely distributed in the outer pipe, each air guide hole comprises a cone portion and a hole portion, the cone portion is of a conical surface structure protruding out of the surface of the outer pipe, two sides of the cone portion are integrally connected with the outer pipe, a gap between the edge of the free end of the cone portion and the outer pipe forms the hole portion, and the through holes in the inner. The branch air outlet pipe and the branch return pipe are both composed of an inner pipe and an outer pipe, through holes are densely distributed in the inner pipe, air flow is facilitated, air guide holes densely distributed in the outer pipe can correspond to the through holes, air passing in and out can be guided, and meanwhile, a certain shielding effect can be achieved on the through holes. Grain is densely stacked around the branch air outlet pipe and the branch return pipe, a pyramid part is convexly arranged on the outer pipe, two sides of the pyramid part are integrally connected with the outer pipe, a densely distributed punch head can be used for punching on the plate to form the pyramid part, the pyramid part protrudes out of the surface of the outer pipe, a gap punched between the free end edge of the pyramid part and the outer pipe is a hole part, the punched plate is surrounded into a tubular structure, and the joint is welded to form the branch air outlet pipe or the branch return pipe. The hole part can be convenient for the air business turn over, realizes the intercommunication of inner tube inside and outer tube outside through hole part, pyramis and through-hole. The plane that the pyramis can make the hole portion place presents the tilt state, can utilize the pyramis to lead to the grain with the pyramis contact simultaneously, even the pressure that grain was stacked is great, make partial grain by the hole portion reversal the pyramis of impressing, still can't reach the through-hole department of inner tube, the air guide hole not only can lead to the air of business turn over promptly, and can realize sheltering from the through-hole, avoid grain to stack during pressure is too big causes reverse flow to get into the inner tube, get into too much grain in the avoiding inner tube and can't clear up and lead to rotting.
Preferably, the middle position of the pyramid part is provided with an air guide groove along the generatrix direction of the pyramid part and concaved towards the inner pipe direction, the air guide groove is in a conical surface structure, and the free end edge of the pyramid part is in an M shape. The middle position of the pyramid part is extruded along the generatrix direction of the pyramid part to form an air guide groove, the air guide groove is in a conical surface, the edge of the free end of the pyramid part is in an M shape due to the forming of the air guide groove, the air guide groove can extrude the plate which is punched into the pyramid part by using a roller with a bulge, and the air guide groove is formed on the pyramid part by using the bulge on the roller. The space in the cone part is divided into a left part and a right part by the air guide groove, air entering and exiting through the cone part is divided into a left flow channel and a right flow channel by the air guide groove, the number of the air flow channels entering and exiting is increased, the contact area with surrounding grains is increased, the air flowing efficiency is improved, grains pressed into the cone part reversely are also divided into the left part and the right part by the air guide groove, the outside of the air guide groove is subjected to the pressure of the grains, the parts on the two sides of the air guide groove are also subjected to the pressure towards the direction of the inner pipe, the trend that the pressure is applied to the outside of the inner space of the cone part is further increased, the pressure generated when the grains are stacked is resisted by the pressure.
Preferably, the tapered portion has a pressure groove recessed along a bottom surface of the tapered portion in a direction toward the inner pipe, and the pressure groove intersects the air guide groove. After the air guide groove is formed, the plate passes through the roller with the transverse bulge, the transverse bulge on the roller is utilized to form a pressing groove extending along the bottom surface direction of the pyramid part on the pyramid part, the pressing groove is intersected with the air guide groove, and the cross-shaped division is formed inside the pyramid part, in the pressing groove forming process, the free end of the pyramid part is enabled to be tilted, namely the inclination angle of the plane where the hole part is located is larger, the ventilation is increased, and meanwhile, grains entering the pyramid part can be directly guided and blocked by the pressing groove. The indent outside receives the pressure of accumulational grain, and the cooperation wind-guiding groove can further increase the pressure of pyramis inner space, and further the pressure that the accumulational pressure of antagonism grain caused the grain of reverse entering pyramis can form the vortex of air current in the crossing position in wind-guiding groove and indent simultaneously, improves the area of contact and the efficiency of business turn over wind and grain, promotes cooling efficiency.
Preferably, the air outlet pipe is positioned at the middle upper part of the storage bin and is lower than the access door, and the return pipe is positioned at the bottom of the storage bin. The air outlet pipe is arranged at the upper position in the middle of the storage bin, so that cold air can enter from the upper part and is discharged downwards through the branch air outlet pipe, and the cooling efficiency is improved by utilizing the principle that the cold air flows downwards. And the air outlet pipe is lower than the access door, namely the air outlet pipe is buried in the fully piled grains, so that the temperature of the interior of the grains close to the wall of the storage bin is increased. The return pipe is positioned at the bottom of the storage bin to realize the maximum air flow.
Preferably, the return pipe is provided with return ports at intervals. Set up the backward flow mouth at the interval on the back flow, the backward flow mouth shape is fixed, can directly install the filter screen and carry out grain and shelter from, only can the air admission, and the steam of being convenient for gets into, promotes the air flow efficiency.
Preferably, the inner walls of the storage bins, which are separated from one outdoor wall, are provided with air outlet pipes and return pipes. When the four side surfaces of the storage bin are separated from one outdoor wall, the air outlet pipe, the return pipe, the branch air outlet pipe and the branch return pipe are uniformly arranged on the four side surfaces. When the storage bin is two spaces about, this one side that two spaces are adjacent can not receive the sunshine, and the temperature in two spaces can influence each other moreover, then only need in other three sides densely covered go out tuber pipe and back flow can, reduce the laying cost of pipeline.
Preferably, the air outlet pipe, the return pipe, the branch air outlet pipe and the branch return pipe are respectively provided with a fixing bracket at intervals, each fixing bracket comprises a hoop and a fixing plate used for being fixed on a wall, and the hoops are fixedly connected with the fixing plates. The air outlet pipe, the return pipe, the branch air outlet pipe and the branch return pipe are fixed with the wall of the inner wall of the storage bin through the fixing support, the hoop tightly holds the pipe body, and the hoop is fixed through the fixing plate, so that all pipelines are fixed.
Therefore, the temperature control system of the grain storage bin has the following advantages: temperature control equipment among the whole device not only can be to the headspace cooling of grain top in the storage storehouse, and go out the tuber pipe through the branch of going out tuber pipe and longitudinal arrangement and carry cold wind to the wall body department that is close to storage storehouse inner wall, the grain cooling that is close to the wall in the grain that piles up in the storage storehouse, the air flow in the grain hole that has realized being close to the wall, bring the heat into to the back flow in by temperature control equipment discharges, even outdoor continuous high temperature, the storage storehouse outer wall lasts the sun, still can guarantee the cooling of storage storehouse inner wall department, reduce the difference in temperature of each position in the whole storage storehouse, and then avoid grain rotten.
Drawings
FIG. 1 is a schematic structural view of the present invention in example 1;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a partially enlarged view of B in FIG. 2 in embodiment 2;
FIG. 4 is a cross-sectional view taken at C-C of FIG. 3;
FIG. 5 is a partially enlarged view of B in FIG. 2 in embodiment 3;
fig. 6 is a partially enlarged view of B in fig. 2 in embodiment 4.
Illustration of the drawings: 1-storage bin, 2-temperature control equipment, 3-air outlet pipe, 4-branch air outlet pipe, 5-return pipe, 6-branch return pipe, 7-return port, 8-cone part, 9-hole part, 10-inner pipe, 11-outer pipe, 12-through hole, 13-air guide groove and 14-pressure groove, wherein the arrow direction represents the air flowing direction.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example 1: as shown in fig. 1 and 2, a temperature control system for a grain storage bin comprises a temperature control device 2 arranged on one side of a storage bin 1 along a wall, wherein the temperature control device is connected with an air outlet pipe 4 and a return pipe 5, the air outlet pipe and the return pipe are transversely arranged around the inner wall of the storage bin, a plurality of longitudinally extending branch air outlet pipes 4 are arranged on the air outlet pipe at intervals, a plurality of longitudinally extending branch return pipes 6 are arranged on the return pipe at intervals, and the branch air outlet pipes and the branch return pipes are distributed at intervals. The air outlet pipe is positioned at the middle upper part of the storage bin and is lower than the access door, and the return pipe is positioned at the bottom of the storage bin. The return pipe is provided with return ports 7 at intervals. The inner walls of all the storage bins separated from one outdoor wall are provided with air outlet pipes and return pipes. The air outlet pipe, the return pipe, the branch air outlet pipe and the branch return pipe are respectively provided with a fixed support at intervals, each fixed support comprises an anchor ear and a fixed plate used for being fixed on a wall, and the anchor ears are fixedly connected with the fixed plates.
The existing air conditioner on one side of the storage bin close to the gable wall can be kept unchanged, meanwhile, a temperature control device is installed on one side of the storage bin, close to the base, along the wall, and can be an existing air conditioner or a temperature and humidity controller, an air outlet pipe and a return pipe are connected to the temperature control device, and the air outlet pipe and the return pipe transversely surround the inner wall of the storage bin. The air outlet pipes are provided with the plurality of branch air outlet pipes at intervals, namely, the temperature control equipment conveys cold air along the inner wall of the storage bin through the air outlet pipes and then discharges the cold air along the longitudinal intervals through the branch air outlet pipes, so that the part between every two adjacent branch air outlet pipes can be cooled. Set up a plurality of branch's back flow on the back flow at the interval, and branch back flow and branch play tuber pipe interval distribution, two adjacent branches play tuber pipe and all have a branch back flow promptly between the tuber pipe, branch play tuber pipe exhaust cold wind can be with grain cooling on every side, cold wind flows along the hole between the grain, brings the air that has the heat originally between the grain into the branch back flow, collects to the back flow by the branch back flow again, gets back to the temperature control equipment by the back flow again and discharges outdoor. Temperature control equipment among the whole device not only can be to the headspace cooling of grain top in the storage storehouse, and go out the tuber pipe through the branch of going out tuber pipe and longitudinal arrangement and carry cold wind to the wall body department that is close to storage storehouse inner wall, the grain cooling that is close to the wall in the grain that piles up in the storage storehouse, the air flow in the grain hole that has realized being close to the wall, bring the heat into to the back flow in by temperature control equipment discharges, even outdoor continuous high temperature, the storage storehouse outer wall lasts the sun, still can guarantee the cooling of storage storehouse inner wall department, reduce the difference in temperature of each position in the whole storage storehouse, and then avoid grain rotten. The air outlet pipe is arranged at the upper position in the middle of the storage bin, so that cold air can enter from the upper part and is discharged downwards through the branch air outlet pipe, and the cooling efficiency is improved by utilizing the principle that the cold air flows downwards. And the air outlet pipe is lower than the access door, namely the air outlet pipe is buried in the fully piled grains, so that the temperature of the interior of the grains close to the wall of the storage bin is increased. The return pipe is positioned at the bottom of the storage bin to realize the maximum air flow. Set up the backward flow mouth at the interval on the back flow, the backward flow mouth shape is fixed, can directly install the filter screen and carry out grain and shelter from, only can the air admission, and the steam of being convenient for gets into, promotes the air flow efficiency. When the storage bin is two spaces about, this one side that two spaces are adjacent can not receive the sunshine, and the temperature in two spaces can influence each other moreover, then only need in other three sides densely covered go out tuber pipe and back flow can, reduce the laying cost of pipeline. The air outlet pipe, the return pipe, the branch air outlet pipe and the branch return pipe are fixed with the wall of the inner wall of the storage bin through the fixing support, the hoop tightly holds the pipe body, and the hoop is fixed through the fixing plate, so that all pipelines are fixed.
Example 2: the present embodiment has substantially the same structure as embodiment 1, except that, as shown in fig. 3 and 4, each of the branch air outlet pipe and the branch return pipe includes an inner pipe 10 and an outer pipe 11 sleeved outside the inner pipe and attached to an outer surface of the inner pipe, through holes 12 for air to flow are densely distributed on the inner pipe, air guide holes integrally connected to the outer pipe are densely distributed on the outer pipe, each air guide hole includes a cone portion 8 and a hole portion 9, the cone portion is a cone structure protruding out of the outer pipe surface, both sides of the cone portion are integrally connected to the outer pipe, a gap between a free end edge of the cone portion and the outer pipe forms a hole portion, and the through holes on the.
The branch air outlet pipe and the branch return pipe are both composed of an inner pipe and an outer pipe, through holes are densely distributed in the inner pipe, air flow is facilitated, air guide holes densely distributed in the outer pipe can correspond to the through holes, air passing in and out can be guided, and meanwhile, a certain shielding effect can be achieved on the through holes. Grain is densely stacked around the branch air outlet pipe and the branch return pipe, a pyramid part is convexly arranged on the outer pipe, two sides of the pyramid part are integrally connected with the outer pipe, a densely distributed punch head can be used for punching on the plate to form the pyramid part, the pyramid part protrudes out of the surface of the outer pipe, a gap punched between the free end edge of the pyramid part and the outer pipe is a hole part, the punched plate is surrounded into a tubular structure, and the joint is welded to form the branch air outlet pipe or the branch return pipe. The hole part can be convenient for the air business turn over, realizes the intercommunication of inner tube inside and outer tube outside through hole part, pyramis and through-hole. The plane that the pyramis can make the hole portion place presents the tilt state, can utilize the pyramis to lead to the grain with the pyramis contact simultaneously, even the pressure that grain was stacked is great, make partial grain by the hole portion reversal the pyramis of impressing, still can't reach the through-hole department of inner tube, the air guide hole not only can lead to the air of business turn over promptly, and can realize sheltering from the through-hole, avoid grain to stack during pressure is too big causes reverse flow to get into the inner tube, get into too much grain in the avoiding inner tube and can't clear up and lead to rotting.
Example 3: the present embodiment is basically the same as embodiment 2, except that, as shown in fig. 5, a wind guide groove 13 is recessed in the middle of the tapered portion along the generatrix direction of the tapered portion and toward the inner tube, the wind guide groove has a tapered structure, and the free end edge of the tapered portion has an "M" shape. The middle position of the pyramid part is extruded along the generatrix direction of the pyramid part to form an air guide groove, the air guide groove is in a conical surface, the edge of the free end of the pyramid part is in an M shape due to the forming of the air guide groove, the air guide groove can extrude the plate which is punched into the pyramid part by using a roller with a bulge, and the air guide groove is formed on the pyramid part by using the bulge on the roller. The space in the cone part is divided into a left part and a right part by the air guide groove, air entering and exiting through the cone part is divided into a left flow channel and a right flow channel by the air guide groove, the number of the air flow channels entering and exiting is increased, the contact area with surrounding grains is increased, the air flowing efficiency is improved, grains pressed into the cone part reversely are also divided into the left part and the right part by the air guide groove, the outside of the air guide groove is subjected to the pressure of the grains, the parts on the two sides of the air guide groove are also subjected to the pressure towards the direction of the inner pipe, the trend that the pressure is applied to the outside of the inner space of the cone part is further increased, the pressure generated when the grains are stacked is resisted by the pressure.
Example 4: the present embodiment is basically the same as embodiment 3, except that, as shown in fig. 6, a pressure groove 14 is recessed in the tapered portion along the bottom surface of the tapered portion and in the direction toward the inner pipe, and the pressure groove intersects with the air guide groove. After the air guide groove is formed, the plate passes through the roller with the transverse bulge, the transverse bulge on the roller is utilized to form a pressing groove extending along the bottom surface direction of the pyramid part on the pyramid part, the pressing groove is intersected with the air guide groove, and the cross-shaped division is formed inside the pyramid part, in the pressing groove forming process, the free end of the pyramid part is enabled to be tilted, namely the inclination angle of the plane where the hole part is located is larger, the ventilation is increased, and meanwhile, grains entering the pyramid part can be directly guided and blocked by the pressing groove. The indent outside receives the pressure of accumulational grain, and the cooperation wind-guiding groove can further increase the pressure of pyramis inner space, and further the pressure that the accumulational pressure of antagonism grain caused the grain of reverse entering pyramis can form the vortex of air current in the crossing position in wind-guiding groove and indent simultaneously, improves the area of contact and the efficiency of business turn over wind and grain, promotes cooling efficiency.
It should be understood that this example is only for illustrating the present invention and is not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Claims (7)
1. A temperature control system of a grain storage bin comprises a temperature control device arranged on one side of the storage bin, and is characterized in that the temperature control device is connected with an air outlet pipe and a return pipe, the air outlet pipe and the return pipe are transversely arranged around the inner wall of the storage bin, a plurality of longitudinally extending branch air outlet pipes are arranged on the air outlet pipe at intervals, a plurality of longitudinally extending branch return pipes are arranged on the return pipe at intervals, the branch air outlet pipes and the branch return pipes are distributed at intervals, each branch air outlet pipe and each branch return pipe comprises an inner pipe and an outer pipe sleeved outside the inner pipe and attached to the outer surface of the inner pipe, through holes for air to flow are densely distributed on the inner pipe, air guide holes integrally connected with the outer pipe are densely distributed on the outer pipe, each air guide hole comprises a cone part and a hole part, the cone part is of a cone surface protruding out of the outer pipe, two sides of the cone part are integrally connected with the, the through hole on the inner tube corresponds to the cone.
2. The system of claim 1, wherein the middle of the pyramid is recessed with an air guiding groove along a generatrix direction of the pyramid and toward the inner tube, the air guiding groove is of a conical surface structure, and a free end edge of the pyramid is of an "M" shape.
3. The system of claim 2, wherein the tapered portion has a pressure groove recessed along a bottom surface of the tapered portion and toward the inner tube, and the pressure groove intersects the air guide groove.
4. The system as claimed in claim 1, 2 or 3, wherein the air outlet pipe is located at the middle upper part of the storage bin and lower than the access door, and the return pipe is located at the bottom of the storage bin.
5. The temperature control system of claim 1, 2 or 3, wherein the return pipe is provided with return ports at intervals.
6. The system as claimed in claim 1, 2 or 3, wherein the air outlet pipe and the return pipe are arranged on all inner walls of the storage bin which are separated from one wall outside the room.
7. The system of claim 1, 2 or 3, wherein the air outlet pipe, the return pipe, the branched air outlet pipes and the branched return pipes are provided with fixing brackets at intervals, each fixing bracket comprises an anchor ear and a fixing plate fixed on the wall, and the anchor ear is fixedly connected with the fixing plate.
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| CN112066640A (en) * | 2020-09-23 | 2020-12-11 | 彭红妹 | Cooling pipeline system of low-temperature granary |
| CN112189458A (en) * | 2020-09-23 | 2021-01-08 | 彭红妹 | Low temperature is vertical baffle detection mechanism that ventilates for granary |
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| KR200383444Y1 (en) * | 2005-01-31 | 2005-05-04 | 주식회사 명진 | A cooling device coercive cycle type a grain storage equipment |
| CN101919330B (en) * | 2009-06-10 | 2012-02-29 | 王允良 | Automatic control system of intelligent low-temperature grain storage and control method thereof |
| CN109121748A (en) * | 2017-06-16 | 2019-01-04 | 房县忠意设备有限公司 | A kind of ventilating stacks pipeline |
| CN208446111U (en) * | 2018-07-16 | 2019-02-01 | 南京丰源建筑设计有限公司 | The horizontal warehouse transversal ventilation paddy drying circulatory system |
| CN209643388U (en) * | 2019-01-18 | 2019-11-19 | 石家庄开发区中实检测设备有限公司 | Preservation of vegetables stores environmental monitoring and control device |
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