Temperature and humidity regulating device of low-temperature fresh-keeping metal granary

Abstract

The invention relates to the technical field of temperature and humidity regulation of vertical silos, in particular to a temperature and humidity regulation device of a low-temperature fresh-keeping metal granary, which comprises an exhaust pipe, a plurality of layers of arc-shaped grooves, a partition plate, heat dissipation strips and exhaust holes, the exhaust pipe is arranged in the center of the interior of the silo, cold air exhausted by the cooling machine enters the silo through the exhaust pipe, the multiple layers of arc-shaped grooves are formed in the exhaust pipe and distributed in the outer surface of the exhaust pipe in a circumferential array mode, the partition plate is arranged on the inner side wall of the silo, and the cooling machine is arranged in the partition plate. According to the invention, the partition plate is arranged between the silo wall and the granary, so that a space is generated between the granary wall and the granary, cold air released by a cooling machine is used for cooling grain piles and then filling the space, the cold air is mixed with the temperature on the silo wall, and the cooling effect is improved. Therefore, the temperature difference between the granary wall absorbing heat and the grains is reduced, and the grains are effectively prevented from dewing due to the temperature difference.

Description

Technical Field

[0001] The invention relates to the technical field of temperature and humidity regulation of vertical silos, and in particular to a temperature and humidity modulation device for a low-temperature fresh-keeping metal granary. Background Art

[0002] With the continuous increase in production, the role of grain storage silos is particularly important. At present, the types of grain storage silos are mostly flat silos, shallow round silos, and vertical silos. Compared with flat silos and shallow round silos, vertical silos have the advantages of large effective storage capacity, small footprint, and good ventilation management. Before the grain is stored in the warehouse, the moisture content of the grain pile is kept at 12% to 14%. After entering the warehouse, the grain is strictly monitored and reasonable ventilation is used to ensure the safe storage of grain.

[0003] Before entering the silo, the impurities in the grain will be screened or winnowed to ensure the purity of the grain. Then, for the over-humid grain, ventilation or drying will be used for dehumidification. After the impurities and dehumidification are completed, the grain will be transported to the entrance of the silo by bucket elevator and sent into the silo. Finally, the new grain entering the warehouse will be fumigated with low-dose phosphine circulation. In autumn and winter, mechanical ventilation will be carried out using natural low temperature to eliminate the risk of condensation. In spring, the temperature will be controlled by closed insulation. In summer, grain coolers will be used regularly to eliminate accumulated heat to achieve year-round low-temperature storage.

[0004] However, Taizhou belongs to the subtropical monsoon climate zone, which is controlled by the summer monsoon in summer, with high temperatures and heavy rainfall. This climate feature causes Taizhou to experience long periods of high temperatures and high humidity in summer. When the cooler cools the grain pile, the metal structure of the granary is easily affected by the high temperature in summer. Grain is a poor conductor of heat and heat transfer is slow. When the outside temperature is higher than the grain temperature, it will cause a "hot skin and cold core" situation. Therefore, the grain near the metal silo wall is easy to condense when it encounters a hot wall, and it is easy to cause condensation, heat, and mildew near the side wall of the granary, affecting the safety and nutritional value of the grain.

[0005] The existing ventilation method of grain silos is that air enters from the bottom air inlet, flows upward along the grain pile, and finally is discharged from the top. Due to the long path of air flow in the silo, the longitudinal ventilation efficiency is low, and the airflow moves nonlinearly in the grain pile, and the surrounding area has a longer ventilation path than other parts. This means that in the corners and edge areas of the grain pile, due to the nonlinear movement of the airflow and the large resistance, the ventilation effect is poor, which is easy to cause dead corners. In addition, in order to avoid the occurrence of "hot skin and cold heart", the existing technology will take insulation and cold preservation measures, such as closed air ducts, closed doors and windows, keeping "cold air" or ventilating through blowers to reduce the water vapor on the side walls. However, the existing ventilation methods lack in-depth and systematic research on the micro-airflow of grain piles, the transfer of moisture and heat in grain piles, and their influence on quality and control technology. This leads to limited control means for local grain changes in actual operation, and it is difficult to achieve accurate local ventilation. There are only single-tube ventilation or manual digging of trenches and ridges on the grain surface to dissipate moisture and heat. The operation is time-consuming and labor-intensive, and the efficiency is low. These traditional ventilation methods cannot meet the needs of large-scale and modern grain silo management.

[0006] Therefore, a temperature and humidity modulation device for a low-temperature fresh-keeping metal granary is proposed. Summary of the invention

[0007] The object of the present invention is to provide a temperature and humidity modulation device for a low-temperature fresh-keeping metal grain silo, wherein the cold air discharged from a cooler enters the annular groove and the silo respectively, and the cold air in the annular groove reduces the temperature difference between the silo wall and the grain after absorbing heat, thereby preventing condensation of the grain on the side wall due to the temperature difference. At the same time, the cold air in the silo forms a plurality of horizontally parallel flow layers due to the flow of negative pressure gas, thereby improving the cooling and humidity control efficiency and quickly taking the heat and water vapor on the side wall of the silo out of the silo.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A temperature and humidity modulation device for a low-temperature fresh-keeping metal granary, the granary comprising a conveying pipe, a silo arranged at the bottom of the conveying pipe, a cooling machine arranged at one side of the silo, and an air inlet pipe opened at the bottom of the silo, the cooling machine is connected to the air inlet pipe, and the temperature and humidity modulation device comprises an exhaust pipe, a multi-layer arc groove, a partition, a heat dissipation strip, an exhaust hole, an annular groove and a groove; the exhaust pipe is arranged at the central position inside the silo, the cold air discharged by the cooler enters the silo through the exhaust pipe, the multi-layer arc groove is arranged on the exhaust pipe, and the multi-layer arc groove is spirally arranged on the outer surface of the exhaust pipe, the partition is arranged on the inner side wall of the silo, an annular groove is opened between the partition and the silo, the annular groove is connected to the air inlet pipe through the groove, the cold air discharged by the cooler enters the annular groove and the arc groove respectively, the heat dissipation strip is arranged in multiple groups, the heat dissipation strip spiral array is on the side wall of the partition, and the heat dissipation strip corresponds to the multi-layer arc groove layer by layer, the exhaust hole is arranged in multiple groups, and is opened on the top of the silo.

[0010] It can be seen that metal-structured granaries are easily affected by high temperatures in summer, while grains are poor conductors of heat and transfer heat slowly. When the outside temperature is higher than the grain temperature, a "hot skin and cold core" situation will occur. Therefore, grains close to the metal silo wall are prone to condensation when encountering a hotter wall, and are prone to condensation, heating, and mildew of grains close to the side walls of the silo, affecting the safety and nutritional value of the grains. The present invention provides a partition between the silo wall and the silo to generate an annular groove between the silo wall and the silo, thereby reducing the temperature difference between the silo wall and the grain after absorbing heat, and can also cool the grains that are in contact with the side walls of the silo, effectively preventing condensation of grains due to temperature differences, and can also improve the efficiency of cooling and humidifying, remove water vapor on the silo wall, and make the airflow more evenly distributed in the silo, so that the same cooling effect is achieved in a shorter time and with higher efficiency.

[0011] In addition, compared with the existing longitudinal ventilation, the transverse ventilation path of the present invention is shorter, the unit ventilation resistance is smaller, and there are fewer ventilation dead corners. Therefore, after the ventilation is completed, the temperature uniformity of each part of the grain pile is significantly improved.

[0012] Preferably, the side wall of the partition is inclined, and the cross-section of the annular groove is narrow at the top and wide at the bottom. The bottom of the annular groove can gather more cold air for cooling compared to the top. In addition, when the grain is discharged, it can smoothly reach the bottom along the inclined surface of the partition, reducing the impact when the grain is discharged.

[0013] Preferably, the annular groove is spiral and evenly distributed along the vertical direction of the silo. The plurality of groups of heat dissipation strips are adapted to the number of spiral turns and spiral angle of the annular groove. The starting end of the annular groove is located at the bottom of the silo, and the end end is located above the silo. The inner wall of the silo can be fully cooled while taking away the water vapor thereon.

[0014] Preferably, the groove runs through the annular groove and the partition, and the exhaust hole is connected to the annular groove, so that the cold air enters the granary and also enters the annular groove.

[0015] Preferably, a protrusion is provided below the arc groove, and the protrusion forms a slope with the edge of the arc groove, and the inclination angle of the slope gradually increases from the edge of the arc groove to the protrusion. By installing an exhaust pipe at the bottom of the discharge port, the grain will first contact the exhaust pipe during the falling process, which can slow down the falling speed of the grain and reduce the direct impact with the bottom of the bin, thereby effectively reducing the possibility of grain breakage.

[0016] Preferably, a channel is also opened in the arc-shaped groove, and two groups of channels are provided. The two groups of channels are arranged on both sides of the arc-shaped groove and are symmetrically staggered with the arc-shaped groove. When the grain enters the silo, it will squeeze the original air in the silo to discharge the air, and the friction between the grain and the air during the falling process will also generate a certain amount of heat. Especially at a faster falling speed, the channel is set so that the air in the silo will be diverted when entering from the arc-shaped groove.

[0017] Preferably, the channel is bent and includes a straight groove and a curved groove, and the two groups of straight grooves expand outward and are inclined relative to the two sides of the arc groove. When the air flows out of the curved groove, it collides with the air entering the arc groove, thereby hindering the air in the silo from entering the exhaust pipe, and more air is discharged from the heat dissipation strip, maintaining the stability of the exhaust pipe, preventing the air from flowing back into the cooler, reducing the wear on the cooler, and the cold air can maintain its speed or even be accelerated when entering the silo through the channel.

[0018] Preferably, arc plates are provided in the two groups of channels, and the edges of the two groups of arc plates are in the arc grooves. When the air in the silo enters the arc grooves, it will be blocked by the arc plates, and most of the air will enter the curved grooves, thereby blocking the air in the silo from entering the exhaust pipe.

[0019] Preferably, a rounded corner is provided at the connection between the straight groove and the curved groove, so that the air moves more smoothly in the curved groove.

[0020] Preferably, the inner edge of the exhaust pipe is provided with multiple groups of inner rings, and the multiple groups of inner rings are arranged at the upper edge of the arc-shaped groove. When the cold air enters the exhaust pipe, the cold air will encounter obstruction at the bottom of the inner ring and enter the arc-shaped groove, so that the cold air flows evenly from the arc-shaped groove into the silo, and the shape of the inner ring can stabilize the flow of the cold air and prevent flow turbulence.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. In order to cope with the "hot skin and cold core" phenomenon that is easy to occur in metal structure granaries under high temperatures in summer, that is, the metal silo wall absorbs heat and forms a temperature difference with the low temperature in the silo, causing the grain near the silo wall to condense due to the temperature difference, the present invention arranges a partition between the silo wall and the grain pile, and opens an annular groove on the partition to form a spiral channel. This design allows the cold air released by the cooler to fill the annular groove after cooling the grain pile, reducing the temperature difference between the silo wall and the grain after absorbing heat, thereby preventing the problem of condensation of the grain on the side wall due to the temperature difference. In addition, the present invention optimizes the flow path of the cold air, improves the traditional longitudinal ventilation method to transverse ventilation, shortens the air flow path in the silo, and improves the cooling efficiency of the silo.

[0023] 2. When the grain cooler releases cold air, part of the cold air will be diverted into the annular groove. The cold air will enter the annular groove path, rotate and rise to the top of the silo and flow out from the exhaust hole. In this process, the air flow in the annular groove creates negative pressure in the silo, so that each group of cold air discharged from the arc groove passes horizontally through the silo to the heat dissipation strip, which can achieve precise local ventilation with fewer ventilation dead corners. Therefore, after the ventilation is completed, the temperature uniformity of various parts of the grain pile is significantly improved.

[0024] 3. The present invention effectively slows down the falling speed of grains by introducing an exhaust pipe in the grain falling path, reduces its impact on the bottom of the silo, and thus reduces the risk of grain breakage. At the same time, during the grain feeding process, the grains will be automatically graded, and the presence of the exhaust pipe helps to disrupt this natural falling pattern, so that the grains can be dispersed on the inclined side walls of the partition when falling, reducing the grading phenomenon caused by gravity and air resistance, and promoting a more uniform distribution of grains. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a temperature and humidity modulation device for a low-temperature fresh-keeping metal granary of the present invention;

[0026] Figure 2 It is a cross-sectional view of a temperature and humidity modulation device for a low-temperature fresh-keeping metal granary of the present invention;

[0027] Figure 3 For the present invention Figure 2 A schematic diagram of the structure from another angle;

[0028] Figure 4 It is a schematic diagram of the structure of the air intake pipe of the present invention;

[0029] Figure 5 For the present invention Figure 3 The enlarged view of point A and the schematic diagram of the path of air in the cylinder entering the exhaust pipe;

[0030] Figure 6It is a structural schematic diagram of the channel of the present invention;

[0031] Figure 7 A schematic diagram of metal granary ventilation according to the prior art of the present invention;

[0032] Figure 8 A schematic diagram of the path of air inlet and outlet of the cooling machine of the present invention;

[0033] In the figure: 1, conveying pipe; 2, silo; 3, cooler; 4, air inlet pipe; 5, exhaust pipe; 6, arc groove; 7, partition; 8, heat dissipation strip; 9, exhaust hole; 10, ring groove; 11, groove; 12, bump; 13, channel; 131, straight groove; 132, curved groove; 133, arc plate; 134, fillet; 14, inner circle. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1 , Figure 2 and Figure 8 A temperature and humidity modulation device for a low-temperature fresh-keeping metal granary, the granary comprises a conveying pipe 1, a silo 2 arranged at the bottom of the conveying pipe 1, a cooler 3 arranged on one side of the silo 2, and an air inlet pipe 4 opened at the bottom of the silo 2, the cooler 3 is connected to the air inlet pipe 4, the temperature and humidity modulation device comprises an exhaust pipe 5, a multi-layer arc groove 6, a partition 7, a heat dissipation strip 8, an exhaust hole 9, an annular groove 10 and a groove 11; the exhaust pipe 5 is arranged at the center of the silo 2, the cold air discharged by the cooler 3 enters the silo 2 through the exhaust pipe 5, and the multi-layer arc A shaped groove 6 is provided on the exhaust pipe 5, and multiple layers of arc grooves 6 are spirally provided on the outer surface of the exhaust pipe 5. A partition 7 is provided on the inner wall of the silo 2. An annular groove 10 is provided between the partition 7 and the silo 2. The annular groove 10 is connected with the air inlet pipe 4 through a groove 11. The cold air discharged by the cooler 3 enters the annular groove 10 and the arc groove 6 respectively. A plurality of heat dissipating strips 8 are arranged. The heat dissipating strips 8 are spirally arrayed on the side wall of the partition 7, and the heat dissipating strips 8 correspond to the multiple layers of arc grooves 6 layer by layer. A plurality of exhaust holes 9 are provided and are provided on the top of the silo 2.

[0036] It can be seen that the granary with metal structure is easily affected by the high temperature in summer, while grain is a poor conductor of heat and has a slow heat transfer. When the external temperature is higher than the grain temperature, it will cause a "hot skin and cold core" situation. Therefore, the grain near the wall of the metal silo is easy to condense when it encounters a hotter wall, and it is easy to cause condensation, heat and mildew on the grain near the side wall of the silo, affecting the safety and nutritional value of the grain. When this happens, it may cause condensation, heat and mildew on the side wall of the grain pile, affecting the safety and nutritional value of the grain. The present invention sets a partition 7 between the silo wall and the silo, and opens an annular groove 10 to make the silo wall A spiral channel 13 is generated between the cooler 3 and the partition 7, and the cold air released by the cooler 3 is used to fill the annular groove 10 after cooling the grain pile. The cold air is mixed with the temperature on the silo wall, which reduces the temperature difference between the silo wall and the grain after absorbing heat. At the same time, it can also cool the grain that is in contact with the side wall of the silo 2, effectively preventing the grain from condensing due to the temperature difference. When the cold air released by the cooler 3 cools the grain pile, the exhaust pipe 5 can also improve the efficiency of cooling and humidifying, remove the water vapor on the silo wall by changing the moving direction of the cold air, and the airflow is more evenly distributed in the silo, so that the same cooling effect is achieved in a shorter time and with higher efficiency.

[0037] In addition, due to the position of the arc groove 6, the cold air discharged from the exhaust pipe 5 moves horizontally to the partition 7. The horizontal ventilation path is shorter than the longitudinal one, the unit ventilation resistance is small, and there are fewer ventilation dead corners. Therefore, after the ventilation is completed, the temperature uniformity of various parts of the grain pile is significantly improved.

[0038] As an embodiment of the present invention, refer to Figure 2 The side wall of the partition 7 is inclined, and the cross-section of the annular groove 10 is narrow at the top and wide at the bottom. The heat absorbed by the ground will be transferred to the air in contact with the ground through heat conduction, so that the air temperature near the ground increases, so that the bottom of the annular groove 10 can gather more cold air for cooling compared to the top. In addition, when the grain is unloaded, it can smoothly reach the bottom along the inclined surface of the partition 7, reducing the impact of the grain when it is unloaded.

[0039] As an embodiment of the present invention, refer to Figure 2 and Figure 3 The annular groove 10 is spiral and evenly distributed along the vertical direction of the silo 2. The plurality of heat dissipation strips 8 are adapted to the number of spiral turns and spiral angle of the annular groove 10. The starting end of the annular groove 10 is located at the bottom of the silo 2, and the end end is located above the silo 2. When cold air penetrates the grain pile and enters the annular groove 10, the air will gather in the annular groove 10 and flow along the shape of the annular groove 10, fully fitting with the inner wall of the silo 2 to cool it down and take away the water vapor thereon.

[0040] As an embodiment of the present invention, refer to Figure 3 The groove 11 passes through the annular groove 10 and the partition plate 7 , and the exhaust hole 9 is connected to the annular groove 10 .

[0041] As an embodiment of the present invention, refer to Figure 4 and Figure 6 A protrusion 12 is provided below the arc groove 6, and the protrusion 12 forms an inclined surface with the edge of the arc groove 6, and the inclined surface gradually increases the inclination angle from the edge of the arc groove 6 to the protrusion 12. By installing the exhaust pipe 5 at the bottom of the discharge port, the grain will first contact the exhaust pipe 5 during the falling process, which can slow down the falling speed of the grain and reduce the direct impact with the bottom of the warehouse, thereby effectively reducing the possibility of grain breakage. In addition, during the discharge process of the grain, due to differences in particle size, fullness, water content, etc., automatic grading is likely to occur. The setting of the exhaust pipe 5 helps to disrupt the natural falling trajectory of the grain. When falling, the grain will be dispersed to the inclined side wall of the partition 7, reducing the grading caused by gravity and air resistance, making the grain distribution more uniform, and the inclined surface formed by the protrusion 12 and the edge of the arc groove 6 can prevent the grain from entering the arc groove 6.

[0042] As an embodiment of the present invention, refer to Figure 6 A channel 13 is also provided in the arc groove 6. There are two groups of channels 13. The two groups of channels 13 are provided on both sides of the arc groove 6 and are symmetrically staggered with the arc groove 6. When the grain enters the silo 2, it will squeeze the original air in the silo to discharge the air. In addition, the friction between the grain and the air during the falling process will also generate a certain amount of heat. Especially at a faster falling speed, the channel 13 is provided so that the air in the silo will be diverted when entering from the arc groove 6.

[0043] As an embodiment of the present invention, refer to Figure 5 , Figure 6 The channel 13 is bent and includes a straight groove 131 and a curved groove 132. The two groups of straight grooves 131 expand outward and are inclined relative to the two sides of the arc groove 6. The inclination angle of the straight groove 131 is the same as the direction in which the air in the silo 2 enters the arc groove 6. When the air in the granary enters from the straight groove 131, the air flowing in the curved groove 132 will collide with the air entering the arc groove 6 when it enters the arc groove 6 again, thereby hindering the air in the silo 2 from entering the exhaust pipe 5. More air is discharged from the heat dissipation strip 8 to maintain the stability of the exhaust pipe 5, prevent the air from flowing back into the cooler 3, and reduce the wear on the cooler 3. In addition, when the cold air is discharged from the arc groove 6 to the outside, the cold air flowing through the first curved groove 132 does not need to take a detour, but is a straight pipeline. The diverted cold air will continue to merge and almost form a straight line without any obstacles, and then move forward repeatedly. This design allows the cold air to maintain its speed when entering the silo 2, or even accelerate it.

[0044] As an embodiment of the present invention, refer to Figure 1Arc plates 133 are provided in the two groups of channels 13, and the edges of the two groups of arc plates 133 are both in the arc groove 6. When the air in the silo 2 enters the arc groove 6, it will be blocked by the arc plates 133, and most of the air will enter the curved groove 132, which will hinder the air in the silo 2 from entering the exhaust pipe 5.

[0045] As an embodiment of the present invention, refer to Figure 6 A rounded corner 134 is provided at the connection between the straight groove 131 and the curved groove 132 , so that the air moves more smoothly in the curved groove 132 .

[0046] As an embodiment of the present invention, refer to Figure 6 The inner edge of the exhaust pipe 5 is provided with multiple groups of inner rings 14, and the multiple groups of inner rings 14 are arranged at the upper edge of the arc groove 6. When the cold air enters the exhaust pipe 5, the cold air will encounter the obstruction at the bottom of the inner ring 14 and enter the arc groove 6, so that the cold air flows evenly from the arc groove 6 into the silo 2, and the shape of the inner ring 14 can stabilize the flow of the cold air and prevent flow turbulence.

[0047] Working principle: When the grain enters the silo 2 through the conveying pipe 1, the grain will first contact the exhaust pipe 5 during the falling process, which can slow down the falling speed of the grain and reduce the direct impact with the bottom of the silo, thereby effectively reducing the possibility of grain breakage. In addition, during the feeding process, the grain is prone to automatic grading due to differences in particle size, fullness, moisture content, etc. The setting of the exhaust pipe 5 helps to disrupt the natural falling trajectory of the grain. When falling, the grain will be dispersed to the inclined side wall of the partition 7, reducing the grading caused by gravity and air resistance, making the grain distribution more uniform; when the grain falls and fills the granary, the granary needs to be temperature-controlled, especially in summer when the outside temperature is higher than the grain temperature, the grain close to the metal silo wall is easy to condense when it encounters the hotter wall. When the outside temperature is higher than the grain temperature, it will cause a "hot skin and cold core" situation. Therefore, the grain near the metal silo wall is easy to condense when encountering a hotter wall, and it is easy to cause condensation, heat and mildew of the grain near the side wall of the silo, affecting the safety and nutritional value of the grain. The present invention sets a partition 7 between the silo wall and the silo, and opens an annular groove 10 between the two. By opening the annular groove 10, a spiral channel 13 is generated between the silo wall and the partition 7. The cold air released by the cooler 3 enters the annular groove 10 through the heat dissipation strip 8 after cooling the grain pile. At this time, the cold air is mixed with the temperature on the silo wall, which can reduce the temperature difference between the silo wall and the grain after absorbing heat, and can also cool the grain that is in contact with the side wall of the silo 2, effectively preventing the grain from condensing due to the temperature difference;

[0048] When the cold air enters the silo 2 through the exhaust pipe 5, the present invention improves the traditional longitudinal ventilation mode into transverse ventilation by optimizing the flow path of the cold air. Figure 7: Due to the position of the arc groove 6, the exhausted cold air moves horizontally to the partition 7. The horizontal ventilation path is shorter than the longitudinal one, the unit ventilation resistance is small, and there are fewer ventilation dead corners. Therefore, after the ventilation is completed, the temperature uniformity of the grain pile is significantly improved;

[0049] It should be noted that when the grain cooler 3 releases cold air, a portion of the cold air will be diverted into the annular groove 10. The cold air will enter the annular groove 10 and rotate and rise to the top of the silo 2 and flow out from the exhaust hole 9. In this process, the flow speed of the annular groove 10 will be greater than the speed of the cold air in the silo 2 due to the lack of grain obstruction, so that when the air in the annular groove 10 flows, a negative pressure is generated in the grain silo. The formed negative pressure generates suction for the cold air blown out of the arc groove 6, so that each lateral wind will pass through the heat dissipation strip 8, and the number of circles and intervals of the heat dissipation strip 8 and the annular groove 10 correspond to each other. In this way, after the cold air is discharged horizontally from the arc groove 6, it is accelerated by the negative pressure to pass through the heat dissipation strip 8 and flow into the annular groove 10. At this time, the cold air moving upward in the annular groove 10 can not only take away the high temperature of the silo wall, but also remove the water vapor on the silo wall and accelerate the cooling speed. In addition, since the lateral ventilation path is short, the unit ventilation resistance is small, and there are fewer ventilation dead corners, after the ventilation is completed, the temperature uniformity of various parts of the grain pile is significantly improved.

[0050] In addition, the friction between the grain and the air during the falling process will also generate a certain amount of heat, especially at a faster falling speed. The present invention is provided with a channel 13, and the channel 13 is provided so that when the air in the silo enters from the arc groove 6, it will be diverted due to the obstruction of the arc plate 133. After part of the air at the entrance of the arc groove 6 enters from the straight groove 131, the air flowing in the curved groove 132 enters the arc groove 6 again, and at this time it will collide with the air entering from the arc groove 6, thereby hindering the air in the silo 2 from entering the exhaust pipe 5, and the silo 2 will be blocked. The air inside can only slowly enter the arc groove 6, which prompts more air to be discharged from the heat dissipation strip 8 and the exhaust hole 9, reduces the air backflow from the exhaust pipe 5 into the cooler 3, and reduces the wear on the cooler 3. In addition, when the cold air is discharged from the arc groove 6 to the outside, it will not be resisted by the curved groove 132, so it will be discharged very smoothly. This design allows the cold air to maintain its speed when entering the silo 2, and even be accelerated, thereby achieving the advantage that the air in the silo is difficult to enter the exhaust pipe 5, but the cold air is easy to be discharged from the exhaust pipe 5.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A temperature and humidity modulation device for a low-temperature fresh-keeping metal granary, the granary comprising a conveying pipe (1), a silo (2) arranged at the bottom of the conveying pipe (1), a cooler (3) arranged at one side of the silo (2), and an air intake pipe (4) opened at the bottom of the silo (2), the cooler (3) being connected to the air intake pipe (4), characterized in that: The temperature and humidity modulation device comprises an exhaust pipe (5), a plurality of arc-shaped grooves (6), a partition (7), a heat dissipation strip (8), an exhaust hole (9), an annular groove (10) and a groove (11); the exhaust pipe (5) is arranged at the central position inside the silo (2); the cold air discharged from the cooling machine (3) enters the silo (2) through the exhaust pipe (5); the plurality of arc-shaped grooves (6) are arranged on the exhaust pipe (5), and the plurality of arc-shaped grooves (6) are arranged in a spiral shape on the outer surface of the exhaust pipe (5); the partition (7) is arranged on the inner side wall of the silo (2); the partition (9) is arranged on the inner side wall of the silo (2); An annular groove (10) is provided between the plate (7) and the silo (2); the groove (11) is provided above the air inlet pipe (4); the annular groove (10) is connected to the air inlet pipe (4) through the groove (11); cold air discharged from the cooler (3) enters the annular groove (10) and the arc groove (6) respectively; a plurality of heat dissipation strips (8) are arranged in a spiral array on the side wall of the partition plate (7); and the heat dissipation strips (8) correspond to the plurality of arc grooves (6) layer by layer; a plurality of exhaust holes (9) are provided and are provided on the top of the silo (2).

2. The temperature and humidity modulation device for a low-temperature fresh-keeping metal granary according to claim 1, characterized in that: The side wall of the partition (7) is in an inclined state, and the cross section of the annular groove (10) is narrow at the top and wide at the bottom.

3. The temperature and humidity modulation device for a low-temperature fresh-keeping metal granary according to claim 2 is characterized in that: The annular groove (10) is spiral-shaped and evenly distributed along the vertical direction of the silo (2). The plurality of groups of heat dissipation strips (8) are adapted to the spiral turns and spiral angle of the annular groove (10). The starting end of the annular groove (10) is located at the bottom of the silo (2), and the end end is located above the silo (2).

4. The temperature and humidity modulation device for a low-temperature fresh-keeping metal granary according to claim 3 is characterized in that: The groove (11) passes through the annular groove (10) and the partition plate (7), and the exhaust hole (9) is connected to the annular groove (10).

5. A temperature and humidity modulation device for a low-temperature fresh-keeping metal granary according to claim 3 or 4, characterized in that: A protrusion (12) is provided below the arc-shaped groove (6), and the protrusion (12) and the edge of the arc-shaped groove (6) form an inclined surface, and the inclined surface gradually increases in inclination angle from the edge of the arc-shaped groove (6) to the protrusion (12).

6. The temperature and humidity modulation device for a low-temperature fresh-keeping metal granary according to claim 5, characterized in that: A channel (13) is also provided in the arc-shaped groove (6). Two groups of the channels (13) are provided. The two groups of channels (13) are provided on both sides of the arc-shaped groove (6) and are symmetrically staggered with the arc-shaped groove (6).

7. The temperature and humidity modulation device for a low-temperature fresh-keeping metal granary according to claim 6, characterized in that: The channel (13) is bent, comprising a straight groove (131) and a curved groove (132), and the two groups of straight grooves (131) are expanded outwards and arranged obliquely relative to the two sides of the arc-shaped groove (6).

8. The temperature and humidity modulation device for a low-temperature fresh-keeping metal granary according to claim 7, characterized in that: Arc plates (133) are arranged in the two groups of channels (13), and the edges of the two groups of arc plates (133) are both located in the arc grooves (6).

9. The temperature and humidity modulation device for a low-temperature fresh-keeping metal granary according to claim 8, characterized in that: A rounded corner (134) is provided at the connection between the straight groove (131) and the curved groove (132).

10. The temperature and humidity modulation device for a low-temperature fresh-keeping metal granary according to claim 9, characterized in that: The inner edge of the exhaust pipe (5) is provided with a plurality of groups of inner rings (14), and the plurality of groups of inner rings (14) are arranged at the upper edge of the arc-shaped groove (6).

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