Overwintering storage method and storage device for peony seeds in alpine region

Abstract

The invention relates to the technical field of overwintering storage of peony seeds in alpine regions, and discloses an overwintering storage method and storage device for peony seeds in alpine regions, the storage device comprises a passive heating mechanism, and the passive heating mechanism is fixedly mounted in a supporting cylinder. The overwintering storage method for the peony seeds in the alpine region comprises the steps that firstly, sand is stirred, a sand layer is laid, and the peony seeds are placed; secondly, the storage barrels and the storage plates are placed in a combined mode; thirdly, passive geothermal heating is conducted on the heat preservation barrel; 4, oxygen is introduced into the heat preservation cylinder at regular time, humidity is automatically controlled, and temperature is monitored in real time; and step 5, determining the low-temperature sand storage time of the peony seeds. The method has the beneficial effects that a temperature guarantee is provided for low-temperature sand storage stratification treatment in the alpine regions of the peony seeds, and through automatic control over ventilation, oxygen supply and humidity of the storage device, the appropriate humidity of the sand layer is kept, and the problem that the peony seeds are mildewed due to oxygen deficit in the overwintering storage process is solved.

Description

Technical Field

[0001] This invention relates to the field of overwintering storage technology for peony seeds in high-altitude and cold regions, and particularly to a method and device for overwintering peony seeds in high-altitude and cold regions. Background Technology

[0002] Peonies have been cultivated in my country for over 1600 years, possessing high ornamental, medicinal, and oil-producing value. They are also a top candidate for China's national flower and are widely cultivated as a pillar industry in many parts of the country. Peonies are categorized into Central Plains, Southwest, Jiangnan, and Northwest varieties. With the development of the peony industry, a new "Northeast variety group" has gradually formed in high-altitude, cold-climate regions, primarily centered in the three northeastern provinces and Inner Mongolia, making the saying "peonies don't cross the Shanhaiguan Pass" a thing of the past. Due to the late start of peony cultivation in high-altitude, cold regions and the harsh environment, the number of plants is currently limited, making propagation difficult. Most are cold-resistant varieties selected from the Central Plains and Northwest regions and introduced to these areas for domestication and adaptation to the local climate. The sowing time for large-scale peony seedling cultivation is typically from mid-September to late October for Central Plains varieties, while for Jiangnan and Southwest varieties, it can be delayed until late November. However, in high-altitude and cold regions, sowing needs to be brought forward to mid-August. After soaking the peony seeds, they can be directly sown into the field, covered with a thick layer of soil (5-8 cm) and then covered with straw for warmth. The main purpose of sowing earlier in these regions is to allow the seeds to naturally complete the stratification process in the soil, completing the after-ripening of the peony seeds, and germinating the following spring, thus eliminating the need for artificial sand stratification to promote seed ripening and germination. In high-altitude and cold regions, winter temperatures drop to -30℃. If sowing and seedling cultivation are carried out in mid-August, even with the thick soil covering and straw insulation, some peony seed cells may freeze and die or lose vitality, leading to a reduced survival rate for peony seedlings.

[0003] For high-altitude and cold regions, the measure to improve the survival rate of peony seeds is to sow them in the field in March or April of the following year. However, this requires low-temperature overwintering storage of peony seeds to complete their after-ripening and germination, thereby ensuring the survival rate of peonies sown in the following spring. In existing technologies, low-temperature overwintering storage of peony seeds is achieved through sand stratification. For example, patent publication number 202110449665.0, entitled "A Sand Storage Tank for Peony Seeds," describes a tank body with a detachable end cap at the tank opening. The end cap is equipped with a temperature sensor, a humidity sensor, and a fan that extend into the tank body. An air valve is also located on the end cap. The tank body contains at least one storage area, within which a sand layer, a mixed layer, and another sand layer are arranged sequentially from top to bottom. The mixed layer is a mixture of seeds and sand. The main technical problem with the aforementioned patented solutions is the lack of a heating function, making them unsuitable for overwintering peony seeds in cold regions (-30℃). Extreme freezing inhibits enzyme activity and can even lead to physiological dysfunction, preventing the dormancy-breaking process. Free water within the embryo cells forms ice crystals at -30℃, piercing cell membranes and causing seed death or loss of viability. This results in the seeds failing to germinate the following spring, or exhibiting extremely low germination rates and deformed seedlings. Based on these technical deficiencies in the existing technology, the inventors have developed a method and device for overwintering peony seeds in cold regions, effectively solving the aforementioned technical problems. Summary of the Invention

[0004] To address the problems in the prior art, this invention provides a method and device for overwintering peony seeds in high-altitude and cold regions. This invention utilizes shallow geothermal energy (below 3 meters) in high-altitude and cold regions as a passive heating method to provide a relatively constant (4℃~5℃) heat energy to the peony seed overwintering storage device. This provides temperature assurance for the low-temperature sand stratification treatment of peony seeds. Furthermore, through automatic control of ventilation, oxygen supply, and humidity in the storage device, it not only maintains suitable humidity in the sand layer but also prevents mold growth caused by oxygen deficiency during the overwintering storage of peony seeds.

[0005] This invention provides a winter storage device for peony seeds in high-altitude and cold regions, comprising a sheet metal shell, a lid, and a handle. The sheet metal shell is a hollow cuboid, closed at the bottom and open at the top. The lid is installed on the upper part of the sheet metal shell, and the handle is fixedly located at the upper center of the lid. A support cylinder is vertically fixed at the four bottom corners of the sheet metal shell. A human-machine interface system is fixedly located at the middle right side of the sheet metal shell. The human-machine interface system is used for automatic control of the oxygen supply mechanism and the atomizing nozzle, and automatically detects the temperature and humidity inside the insulation cylinder. A passive heating mechanism is fixedly installed inside the support cylinder and extends into the insulation cylinder. The passive heating mechanism utilizes geothermal energy to provide the temperature required for low-temperature sand stratification treatment of peony seeds inside the insulation cylinder. The insulation cylinder is fixed inside the sheet metal shell and is used to hold the storage cylinder. The oxygen supply mechanism is fixedly located at the center of the sheet metal shell and the lid, and is used to supply oxygen to the inside of the insulation cylinder for the low-temperature sand stratification treatment of peony seeds. The storage cylinder is placed in the center of the insulation cylinder and is used to place storage trays in layers. The storage tray is placed inside the storage cylinder and is used to lay sand layers and place peony seeds. The atomizing nozzle is fixedly located on the upper left side of the oxygen supply mechanism on the lid, and extends to the bottom of the lid. The atomizing nozzle is used to spray water onto the storage trays. The temperature and humidity sensor is fixedly located on the upper right side of the oxygen supply mechanism on the lid and is used to detect the temperature and humidity inside the insulation cylinder.

[0006] The sheet metal housing has through holes at the four corners of its bottom, and the diameter of the through holes is equal to the inner diameter of the support cylinder.

[0007] The support cylinder includes a support cylinder body, which is a hollow cylindrical shape with a protruding edge at the bottom. The inner ring is fixedly installed inside the support cylinder body near the bottom, and fixing holes are evenly opened on the circumferential surface of the inner ring. The interior of the support cylinder body is in communication with the sheet metal shell.

[0008] The human-machine interaction system includes a fixed plate, which is fixedly installed at the middle right side of the sheet metal housing. A support rod is fixedly installed horizontally and vertically on the right side surface of the fixed plate. A control panel is fixedly installed on the right side of the support rod. A display screen is installed at the front of the control panel. A PLC control module is fixedly installed inside the rear of the control panel. The display screen and the PLC control module are fixedly connected by a signal line.

[0009] The passive heating mechanism includes a sealed tube, which is a seamless pressure-resistant tube, with a cap fixedly installed at the upper part of the sealed tube; a rotating handle fixedly installed in the cap, with a cone tip fixedly installed at the lower part of the sealed tube, the cone tip and the sealed tube being an integral structure; a spiral blade fixedly installed at the bottom of the sealed tube, with an insulation layer wrapped around the sealed tube above the spiral blade, the height of the insulation layer being greater than the height of the frozen soil layer; a fixed plate fixedly installed on the upper part of the insulation layer, the fixed plate being welded and fixed to the sealed tube, with connection holes evenly opened on the circumferential surface of the fixed plate; heat dissipation fins fixedly installed at the upper part of the sealed tube, the heat dissipation fins being spiral-shaped; and spiral grooves opened on the inner wall of the upper part of the sealed tube, extending from top to bottom to the upper part of the fixed plate.

[0010] The length of the spiral blade at the bottom of the sealed tube is 1.5 meters, and the distance from the insulation layer on the sealed tube to the cone tip is 3 meters; the length of the heat dissipation fins is less than the height of the heat dissipation cavity.

[0011] The heat insulation cylinder includes a heat insulation cylinder body, which is square in shape. The storage cavity is located at the center of the heat insulation cylinder body and is circular with a closed bottom and an open top. The heat dissipation cavity is cylindrical with an open bottom and a closed top. The heat dissipation cavity is vertically located at the four corners of the heat insulation cylinder body. Each heat dissipation cavity has vertically and evenly distributed heat dissipation holes facing the center of the storage cavity.

[0012] The oxygen supply mechanism includes a first check valve and a second check valve. The first check valve is fixedly located at the center of the upper part of the box cover, and the second check valve is fixedly located at the center of the bottom of the sheet metal box shell. The air hood is a hollow square shape with an open bottom and a closed top, and is fixedly located at the center of the upper part of the box cover. The fan is fixedly located in the square mounting hole at the top of the air hood, and the four sides of the fan are coated with sealant. The oxygen vent is located at the center of the bottom of the insulation cylinder body, and the oxygen vent is vertically aligned with the second check valve. The connecting plate is figure-eight shaped, with four connecting plates located at the four corners of the upper part of the fan. The outer end of the connecting plate contacts the upper part of the air hood, and the front and rear ends of the connecting plate have through holes. Screws are used to pass through the front and rear through holes of the connecting plate and fix it to the upper part of the fan body or the air hood. The fan motor is fixedly connected to the PLC control module via a signal line.

[0013] The storage cylinder includes a storage cylinder body, which is a hollow cylindrical shape. Heat exchange holes are evenly distributed from top to bottom around the outer wall of the storage cylinder body, and the heat exchange holes are strip-shaped. Support rings are evenly distributed from top to bottom on the inner wall of the storage cylinder body, and the outer wall of the support rings is fixedly connected to the inner wall of the storage cylinder body. A distance is reserved between the upper support ring and the top of the storage cylinder body, and a distance is reserved between the bottom support ring and the bottom of the storage cylinder body. Placement slots are symmetrically distributed at equal angles on the surface of the support rings, and the placement slots between the support rings are vertically corresponding. Lifting rods are symmetrically arranged on the upper surface of the top support ring inside the storage cylinder body, and the lifting rods are higher than the upper part of the storage cylinder body. The outer diameter of the storage cylinder body is smaller than the inner diameter of the storage cavity.

[0014] The storage tray includes a storage tray body, which is a hollow disc with an open top and a closed bottom. Ventilation holes are evenly distributed at the bottom of the storage tray body. Support blocks are symmetrically fixed on the outer circumferential wall of the storage tray body. The size of the support blocks is equal to the size of the placement groove. The diameter of the ventilation holes is smaller than the diameter of the sand.

[0015] A high-pressure water pipe is fixedly installed on the upper part of the atomizing nozzle. The other end of the high-pressure water pipe is fixedly connected to the solenoid valve on the water outlet of the water supply pump. The solenoid valve on the water outlet of the water supply pump is fixedly connected to the PLC control module through a signal line. The temperature and humidity sensor is fixedly connected to the PLC control module through a signal line.

[0016] This invention provides a method for overwintering peony seeds in high-altitude and cold regions:

[0017] Step 1: Sand mixing, sand layer laying, and peony seed placement: Mix the sand with water using a small mixer, controlling the sand moisture content to 60%~70%; First, lay a layer of sand with a moisture content of 60%~70% and a thickness of 2cm~3cm at the bottom of the storage tray; then, evenly scatter the selected, plump, and uniformly sized peony seeds from the current year on the sand at the bottom of the storage tray; finally, lay a layer of sand 1.2cm~2cm thick on top of the peony seeds.

[0018] Step 2: Combining and placing the storage cylinder and storage tray: Clamp the storage tray from Step 1 with a clamp and align it concentrically with the storage cylinder body. Simultaneously, align the support block on the outer wall of the storage tray with the placement groove of the support ring inside the storage cylinder body. Then, move the storage tray downwards along the center of the storage cylinder body to the top of the support ring at the bottom of the storage cylinder body. At this point, rotate the storage tray with the clamp, offsetting the support block from its corresponding position in the placement groove. Place the storage tray on the support ring at the bottom of the storage cylinder body and release the clamp. Then, follow the above steps to place one storage tray on each support ring inside the storage cylinder body. Finally, the operator lifts the lifting rod and places the storage cylinder and storage tray into the storage cavity of the insulation cylinder.

[0019] Step 3: Passive geothermal heating of the insulation cylinder: The liquid ammonia in the closed tube of the passive heating mechanism absorbs the temperature of the geothermal layer and vaporizes to produce ammonia vapor. When the ammonia vapor rises to the upper part of the closed tube, it condenses upon contact with the cold inner wall of the closed tube. At the same time, the ammonia vapor releases heat to heat the upper part of the closed tube. After condensation, the ammonia vapor flows back down along the spiral groove on the inner wall of the closed tube due to gravity until it reaches the bottom of the closed tube, thus forming a cycle of liquid ammonia absorption, vaporization, condensation, and return. The heat in the upper part of the closed tube is efficiently dissipated to the heat equalization chamber through the spiral heat dissipation fins, and further convected to the storage chamber through the heat dissipation holes. At this time, the geothermal heat is convected to the sand layer in the storage pan through the heat exchange holes on the storage cylinder body, providing a constant low temperature of 4℃~5℃ for the sand layer in the storage chamber of the insulation cylinder.

[0020] Step 4: Timed oxygenation, automatic humidity control, and real-time temperature monitoring in the insulation cylinder: When the humidity sensor detects that the humidity threshold of the sand layer (pre-set via touch keys on the human-machine interface display, with a range of 60%~70%) is less than 60%, the sensor sends the detected humidity value to the PLC control module. Upon receiving the humidity value, the PLC control module sends an opening control command to the solenoid valve at the water supply pump outlet. The water pump then delivers water through a high-pressure pipe to the atomizing nozzle, which atomizes the water and sprays it onto the sand layer in the storage tray, increasing its humidity. When the humidity sensor detects that the sand layer humidity is greater than 70%, the PLC control module sends a closing control command to the solenoid valve at the water supply pump outlet. The spray nozzles stop spraying water. After the oxygen supply mechanism reaches the delay control time, the PLC control module sends an on control command to the fan motor, and the fan starts to rotate. Under the action of the high-speed rotation of the fan, an upward suction force is formed in the air hood and the insulation cylinder body. The upward suction force formed by the air hood compresses the micro spring in one-way valve one. At this time, the valve core pressed by the micro spring opens. At the same time, the upward suction force formed by the air hood compresses the micro spring in one-way valve two, and the valve core opens. The outside air is delivered to the insulation cylinder body through one-way valve two. After the fan motor continues to rotate at high speed for 2 minutes, the PLC control module sends a stop control command to the fan motor, and the fan stops working. The entire oxygen supply action is completed. The temperature and humidity sensor simultaneously detects the temperature of the storage chamber of the insulation cylinder in real time and displays the temperature value on the display screen in real time.

[0021] Step 5: Low-temperature sand storage time for peony seeds: Under the conditions of passive geothermal heating in Step 3 and timed oxygenation, automatic control of sand layer humidity, and real-time temperature monitoring in Step 4, peony seeds will be stored in low-temperature sand until March or April of the following year.

[0022] In step one, the sand is mixed with water using a small mixer, and the moisture content of the sand is controlled at 60% to 70%. The main purpose of this is twofold: firstly, the moisture in the wet sand softens the seed coat of the peony seeds (which have thick seed coats), thereby increasing the germination rate of the peony seeds; secondly, the moisture in the sand promotes the hydrolysis of hydrolytic enzymes in the peony seeds, which in turn provides nutrients for the growth of the peony seed embryo.

[0023] In step one, an empirical method for judging the moisture content of sand is: hold the wet sand in your hand, and if it can be formed into a ball but crumbles easily when touched, the moisture content of the sand is 60% to 70%.

[0024] In step one, a layer of sand with a moisture content of 60%–70% and a thickness of 2–3 cm is laid at the bottom of the storage tray. Then, selected, plump, and uniformly sized peony seeds are evenly scattered on the sand at the bottom of the storage tray. Finally, a layer of sand with a thickness of 1.2–2 cm is laid on top of the peony seeds. The main purpose of this is to ensure that the peony seeds are completely encased in the sand layer, providing the necessary moisture for the low-temperature sand stratification of the peony seeds.

[0025] In step two, the combination of storage cylinders and storage trays serves two main purposes: firstly, it creates a multi-layered space for low-temperature sand storage of peony seeds; secondly, it creates a low-temperature sand storage structure with good oxygen and heat permeability, thereby increasing the storage capacity of peony seeds.

[0026] In step three, the passive geothermal heating of the insulation cylinder utilizes liquid ammonia in the closed tube of the passive heating mechanism to absorb the heat from the geothermal layer. At this time, the liquid ammonia is in a boiling state and vaporizes to produce ammonia vapor. Due to the low density of ammonia vapor, it rises along the closed tube. When the ammonia vapor rises to the upper part of the closed tube, it condenses upon contact with the cold inner wall of the closed tube. At the same time, the ammonia vapor releases heat to heat the upper part of the closed tube. Then, through the efficient heat dissipation effect of the heat dissipation fins, the relatively constant 4℃~5℃ heat in the geothermal layer below 3 meters is convected and conducted to the storage chamber of the insulation cylinder. On the one hand, it can provide the storage chamber with the relatively constant storage temperature of 4℃~5℃ required for the low-temperature sand storage of peony seeds. On the other hand, it saves the electricity consumed by active heating (electric heating or gas heating) and reduces the cost of overwintering storage of peonies in high-altitude and cold regions.

[0027] The beneficial effects of this invention are:

[0028] 1. By setting up a passive heating mechanism, the liquid ammonia in the closed tube of the passive heating mechanism absorbs the temperature heat of the geothermal layer. Through the boiling, vaporization and condensation cycle of the liquid ammonia, the geothermal heat is released, realizing passive heating of the storage chamber. This provides the storage chamber with a relatively constant storage temperature of 4℃~5℃ required for the low-temperature sand storage of peony seeds, saving the power consumption of active heating. At the same time, it can ensure that the peony seeds complete the after-ripening and germination of peony seeds in high-altitude and cold regions through low-temperature sand storage, breaking the dormancy period of peony seeds, thereby ensuring the survival rate of peonies sown in the following spring.

[0029] 2. The insulation cylinder, made of broken glass (foam glass) produced by high-temperature foaming, has good air permeability and does not absorb moisture at all. On the one hand, it prevents the insulation cylinder from losing its heat preservation performance due to moisture absorption in the high-humidity sand storage environment. On the other hand, it improves the air permeability of peony seeds during low-temperature sand storage, effectively preventing mold growth in peony seeds during sand storage.

[0030] 3. By coordinating multiple support rings, storage trays, and support blocks in the storage cylinder, a multi-layered space for low-temperature sand storage of peony seeds is formed on the one hand; on the other hand, a low-temperature sand storage structure with good oxygen permeability and heat permeability is formed, thereby increasing the storage capacity of peony seeds. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the present invention;

[0032] Figure 2 This is a partially enlarged view of the box lid of the present invention;

[0033] Figure 3 This is a cross-sectional view of the present invention;

[0034] Figure 4 This is a schematic diagram of the passive heating mechanism of the present invention;

[0035] Figure 5 This is a cross-sectional view of the passive heating mechanism of the present invention in use deep within the permafrost layer and geothermal layer;

[0036] Figure 6 This is a partial cross-sectional view of the heat insulation cylinder of the present invention;

[0037] Figure 7 This is a partial cross-sectional view of the assembly state of the support cylinder, passive heating mechanism and heat preservation cylinder of the present invention;

[0038] Figure 8 This is a schematic diagram of the structure of the storage cylinder of the present invention;

[0039] Figure 9 This is a schematic diagram of the structure of the storage tray of the present invention;

[0040] Markings in the diagram: 1. Sheet metal casing, 2. Cover, 3. Handle, 4. Support cylinder, 41. Support cylinder body, 42. Inner ring, 43. Fixing hole, 5. Human-machine interface system, 51. Fixing plate, 52. Support rod, 53. Control panel, 54. Display screen, 55. PLC control module, 6. Passive heating mechanism, 61. Sealed tube, 62. End cap, 63. Rotating handle, 64. Conical tip, 65. Spiral cutter, 66. Insulation layer, 67. Fixing plate, 68. Connecting hole, 69. Heat dissipation fins, 610. Spiral groove, 7. Insulation cylinder, 7 1. Insulation cylinder body; 72. Storage chamber; 73. Heat equalization chamber; 74. Heat dissipation hole; 8. Oxygen supply mechanism; 81. One-way valve one; 82. One-way valve two; 83. Gas hood; 84. Fan; 85. Oxygen vent; 86. Connecting plate; 9. Storage cylinder; 91. Storage cylinder body; 92. Heat exchange hole; 93. Support ring; 94. Placement slot; 95. Lifting rod; 10. Storage tray; 101. Storage tray body; 102. Ventilation hole; 103. Support block; 11. Atomizing nozzle; 12. Temperature and humidity sensor; 13. Frozen soil layer; 14. Geothermal layer. Detailed Implementation

[0041] The present invention will be further described below with reference to specific embodiments. These embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0042] This invention provides a method and device for overwintering peony seeds in high-altitude and cold regions:

[0043] like Figure 1 or Figure 3 As shown, the sheet metal box shell 1 is a hollow cuboid that is closed at the bottom and open at the top. The box cover 2 is installed on the upper part of the sheet metal box shell 1, and the handle 3 is fixedly set at the middle position of the upper part of the box cover 2. The bottom four corners of the sheet metal box shell 1 are provided with through holes, and the diameter of the through holes is equal to the inner diameter of the support cylinder 4.

[0044] The sheet metal shell 1 and the lid 2 form a sealed space to protect the insulation cylinder 7, which improves the insulation performance of the low-temperature sand stratification treatment of peony seeds and provides a relatively constant (4℃~5℃) low-temperature storage temperature for the low-temperature sand stratification treatment of peony seeds.

[0045] The above-mentioned through holes are provided at the four corners of the bottom of the sheet metal housing 1. When the support cylinder 4 is fixedly installed at the four corners of the bottom of the sheet metal housing 1, the center of the support cylinder body 41 corresponds vertically to the through hole at the bottom of the sheet metal housing 1, thereby forming a structure in which the support cylinder 4 and the heat-spreading cavity 73 of the heat-insulating cylinder 7 are connected vertically, which is used to fix and install the passive heating mechanism 6.

[0046] like Figure 7As shown, the support cylinder 4 is vertically fixed at the four corners of the bottom of the sheet metal housing 1; the support cylinder 4 includes a support cylinder body 41, which is a hollow cylinder with a raised edge at the bottom, and the inner ring 42 is fixedly installed inside the support cylinder body 41 near the bottom. The circumferential surface of the inner ring 42 is evenly provided with fixing holes 43; the interior of the support cylinder body 41 is in communication with the sheet metal housing 1.

[0047] The aforementioned support cylinder body 41, with its hollow internal structure, serves two purposes: firstly, it provides a fixed support for the sheet metal shell 1; secondly, it provides a space for the passive heating mechanism 6 to be fixedly installed.

[0048] like Figure 1 As shown, the human-machine interface system 5 is fixedly installed at the middle right side of the sheet metal shell 1. The human-machine interface system 5 is used for automatic control of the oxygen supply mechanism 8 and the atomizing nozzle 11, and automatically detects the temperature and humidity inside the insulation cylinder 7. The human-machine interface system 5 includes a fixing plate 51, which is fixedly installed at the middle right side of the sheet metal shell 1. A support rod 52 is fixedly installed horizontally and vertically on the right side surface of the fixing plate 51. The control panel 53 is fixedly installed on the right side of the support rod 52. The display screen 54 is installed at the front of the control panel 53. The PLC control module 55 is fixedly installed inside the rear of the control panel 53. The display screen 54 and the PLC control module 55 are fixedly connected by a signal line.

[0049] As set by the PLC control module 55, when the humidity threshold of the sand layer detected by the temperature and humidity sensor 12 (which is preset via the touch keys on the display screen 54 of the human-machine interface system, with a humidity threshold range of 60% to 70%) is less than 60%, the temperature and humidity sensor 12 sends the detected sand layer humidity to the PLC control module 55. After receiving the sand layer humidity value, the PLC control module 55 sends an opening control command to the solenoid valve at the outlet of the water supply pump. The water supply pump delivers water to the atomizing nozzle 11 through a high-pressure water pipe. After atomization by the atomizing nozzle 11, the water is sprayed onto the sand layer on the storage tray 10, thereby increasing the humidity of the sand layer. When the temperature and humidity sensor 12 detects that the sand layer humidity is greater than 70%, the PLC control module 55 sends a closing control command to the solenoid valve at the outlet of the water supply pump after receiving the sand layer humidity value, and the atomizing nozzle 11 stops spraying water.

[0050] The above-mentioned settings, through the PLC control module 55, allow for the pre-setting of the delay control time for the oxygen supply mechanism 8 fan 84 motor via the touch keys on the human-machine interface display screen 54 (the delay control threshold is set to 24 hours, and the oxygen supply time is set to 2 minutes). When the delay control time is reached, the PLC control module 55 sends an on-start control command to the fan 84 motor, and the fan 84 begins to rotate. Under the action of the high-speed rotation of the fan 84, an upward suction force is formed in the air hood 83 and the insulation cylinder body 71. The upward suction force formed by the air hood 83 compresses the micro-motion spring in the one-way valve 1 81. At this time, the valve core pressed by the micro-motion spring opens. Simultaneously, the upward suction force formed by the air hood 83 compresses the micro-motion spring in the one-way valve 2 82, and the valve core opens. In this way, the outside air delivers oxygen to the insulation cylinder body 71 through the one-way valve 2 82. After the fan 84 motor continues to rotate at high speed for 2 minutes, the PLC control module 55 sends a stop-rotation control command to the fan 84 motor, and the fan 84 stops working, completing the entire oxygen supply operation.

[0051] like Figure 1 , 3 As shown in Figures 4 and 5, the passive heating mechanism 6 is fixedly installed inside the support cylinder 4 and extends into the insulation cylinder 7. The passive heating mechanism 6 utilizes geothermal energy to provide the temperature required for the low-temperature sand stratification treatment of peony seeds to the interior of the insulation cylinder 7. The passive heating mechanism 6 includes a closed tube 61, which is a seamless pressure-resistant tube, and a cap 62 is fixedly installed on the upper part of the closed tube 61. A rotating handle 63 is fixedly installed in the cap 62, and a cone tip 64 is fixedly installed at the lower part of the closed tube 61. The cone tip 64 and the closed tube 61 are an integral structure. A spiral cutter 65 is fixedly installed in the closed tube 61. At the bottom of the closed tube 61, the insulation layer 66 wraps around the closed tube 61 above the spiral blade 65, and the height of the insulation layer 66 is greater than the height of the frozen soil layer 13; the fixing plate 67 is fixedly installed on the upper part of the insulation layer 66, and the fixing plate 67 is welded and fixed to the closed tube 61, and the circumferential surface of the fixing plate 67 is evenly provided with connection holes 68; the heat dissipation fins 69 are fixedly installed on the upper part of the closed tube 61, and the heat dissipation fins 69 are spiral-shaped; the spiral groove 610 is opened on the inner wall of the upper part of the closed tube 61, and the spiral groove 610 extends from top to bottom to the upper part of the fixing plate 67.

[0052] The passive heating mechanism 6 described above comprises a closed tube 61, an end cap 62, and a conical tip 64, wherein the closed tube 61 and the conical tip 64 are integrally seamless structures. Liquid ammonia working fluid is injected into the closed tube 61 under vacuum (the injected liquid ammonia working fluid can be used for a long time without replacement). Then, the end cap 62 is installed on the upper part of the closed tube 61 and seamlessly welded to the closed tube 61. The injected liquid ammonia volume is one-third of the length of the closed tube 61. Liquid ammonia has a boiling point of -33℃ and a freezing point of -77℃. Liquid ammonia has a high latent heat of vaporization and absorbs heat during vaporization. Seamlessly welding the closed tube 61 and the end cap 62 increases the pressure limit of the closed tube 61 and prevents leakage of the liquid ammonia working fluid, thus improving the explosion-proof performance of the closed tube 61.

[0053] The working principle of the passive heating mechanism 6 described above is as follows: When the liquid ammonia-filled portion of the closed tube 61 is inserted into the geothermal layer 14 at a depth of 3 meters or less, the temperature of the geothermal layer 14 remains relatively constant within the range of 4℃ to 5℃. At this time, the liquid ammonia absorbs heat from the geothermal layer 14 and is in a boiling state, vaporizing to produce ammonia vapor. Due to the low density of ammonia vapor, it rises upwards along the closed tube 61. When the ammonia vapor rises to the upper part of the closed tube 61, it condenses upon contact with the cold inner wall of the closed tube 61. Simultaneously, the ammonia vapor releases heat to heat the upper part of the closed tube 61. After condensation, its density is greater than that of ammonia vapor. After condensation, the ammonia vapor (liquid) flows back down along the spiral groove 610 on the inner wall of the closed tube 61 due to gravity until it reaches the bottom of the closed tube 61, thus forming a cycle of liquid ammonia from heat absorption, vaporization and condensation back. At this time, the upper outer wall of the closed tube 61 conducts heat to the spiral heat dissipation fins 69 through heat conduction. The spiral heat dissipation fins 69 evenly transport the heat to the heat equalization chamber 73 of the heat insulation cylinder 7, and then transport the heat to the storage chamber 72 through the heat dissipation holes 74, thus finally achieving the heating effect of the storage chamber 72.

[0054] The aforementioned arrangement of the rotating handle 63, cone tip 64, and spiral blade 65 allows the sealed tube 61 to be inserted into the geothermal layer 14 when necessary. By simultaneously rotating and pressing the handle 63, the spiral blade 65 and cone tip 64 guide the sealed tube 61 through the frozen soil layer 13 and into the geothermal layer 14. This allows for easy insertion of the sealed tube 61 of the passive heating mechanism 6 into the geothermal layer 14 without the aid of any tools. Furthermore, the spiral engagement between the spiral blade 65 and the frozen soil layer 13 enhances the stability of the sealed tube 61. When the sealed tube 61 needs to be inserted into the geothermal layer 14, in cold regions where frozen soil exists, a hot air blower can be used to actively thaw the frozen soil at the desired insertion point before inserting the sealed tube 61 into the geothermal layer 14.

[0055] By setting an insulation layer 66 at the contact point between the closed pipe 61 and the frozen soil layer 13, the boiling ammonia vapor can be prevented from absorbing heat from the frozen soil layer 13.

[0056] The aforementioned arrangement of heat dissipation fins 69 can improve the heat conduction and dissipation efficiency of the upper part of the sealed tube 61, thereby maintaining the storage cavity 72 in the insulation cylinder 7 at a temperature of 4℃~5℃.

[0057] The aforementioned fixing plate 67 can fix the closed tube 61 and the inner ring 42 inside the support cylinder 4 together, thus serving to fix the closed tube 61 and the support cylinder 4.

[0058] like Figure 1 As shown in Figure 3, the length of the spiral blade 65 at the bottom of the sealed tube 61 is 1.5 meters, and the distance from the insulation layer 66 on the sealed tube 61 to the cone tip 64 is 3 meters; the length of the heat dissipation fins 69 is less than the height of the heat dissipation chamber 73. When the part of the insulation layer 66 to the cone tip 64 on the sealed tube 61 is inserted into the frozen soil layer 13 and the geothermal layer 14, the bottom of the support cylinder body 41 contacts the ground, thus supporting the sheet metal shell 1 and the lid.

[0059] like Figure 6 and 7 As shown, the insulation cylinder 7 is fixed inside the sheet metal shell 1 and is used to hold the storage cylinder 9. The insulation cylinder 7 includes an insulation cylinder body 71, which is square in shape. The storage cavity 72 is opened at the center of the insulation cylinder body 71 and is circular with a closed bottom and an open top. The heat dissipation cavity 73 is cylindrical with an open bottom and a closed top. The heat dissipation cavity 73 is vertically opened at the four corners of the insulation cylinder body 71. Each heat dissipation cavity 73 has vertically and evenly opened heat dissipation holes 74 facing the storage cavity 72.

[0060] The aforementioned insulation cylinder body 71 is made by high-temperature foaming of broken glass (inorganic material) using a mold. It has good air permeability and does not absorb moisture at all. This avoids the insulation cylinder body 71 from losing its insulation performance due to absorbing moisture in the storage cylinder 9, which is in a high-humidity environment.

[0061] The aforementioned storage cavity 72 provides space for the placement of the storage cylinder 9, and on the other hand, utilizes the passive heating mechanism 6 to create a space for low-temperature stratification of sand storage using geothermal heat.

[0062] The aforementioned heat spreader 73 provides space for the fixed installation of the passive heating mechanism 6. Furthermore, the geothermal heat emitted from the heat dissipation fins 69 can accumulate and diffuse within the heat spreader, thus homogenizing the heating energy. The combination of the heat spreader 73 and the heat dissipation holes 74 allows the heat generated in the heat spreader 73 to diffuse directionally into the storage chamber 72 through the heat dissipation holes 74.

[0063] like Figure 1 , 2 As shown in Figure 3, the oxygen supply mechanism 8 is fixedly installed at the center of the sheet metal shell 1 and the cover 2. The oxygen supply mechanism 8 is used to supply oxygen required for the low-temperature sand stratification treatment of peony seeds into the interior of the insulation cylinder 7. The oxygen supply mechanism 8 includes a one-way valve 81 and a one-way valve 82. The one-way valve 81 is fixedly installed at the center of the upper part of the cover 2, and the one-way valve 82 is fixedly installed at the center of the bottom of the sheet metal shell 1. The air hood 83 is a hollow square shape with an open bottom and a closed top. The air hood 83 is fixedly installed at the center of the upper part of the cover 2. The fan 84 is fixedly installed in the square mounting hole at the top of the air hood 83. The fan 84 is coated with sealant on all four sides; the oxygen vent 85 is located at the bottom center of the insulation cylinder body 71, and the oxygen vent 85 is vertically aligned with the one-way valve 82; the connecting plate 86 is figure-eight shaped, and four connecting plates are respectively located at the four upper corners of the fan 84. The outer end of the connecting plate 86 contacts the upper part of the air cover 83. The front and rear ends of the connecting plate 86 have through holes, and screws are used to fix the connecting plate 86 to the upper part of the fan 84 body or the air cover 83 through the front and rear through holes; the motor of the fan 84 is fixedly connected to the PLC control module 55 through a signal line.

[0064] The aforementioned arrangement of one-way valve 81, one-way valve 82, air hood 83, fan 84, and oxygen vent 85 utilizes the high-speed rotation of fan 84 to create an upward suction force within air hood 83 and the insulation cylinder body 71. This upward suction force compresses the micro-spring in one-way valve 81, opening the valve core held in place by the micro-spring. Simultaneously, the upward suction force from air hood 83 compresses the micro-spring in one-way valve 82, opening the valve core. This allows outside air to supply oxygen to the insulation cylinder body 71 through one-way valve 82. This ensures a regular supply of oxygen to the peony seeds in the storage chamber 72 of the insulation cylinder 7 during sand storage, effectively preventing oxygen deficiency and mold growth in the peony seeds. On the other hand, by utilizing the one-way air passage characteristics of one-way valve 81 and one-way valve 82, cold air from the outside can be prevented from entering the storage chamber 72 of the insulation cylinder 7 when the fan 84 is not rotating at high speed, thereby avoiding a decrease in the temperature of the storage chamber 72.

[0065] like Figure 3 , 8As shown, the storage cylinder 9 is placed at the center of the insulation cylinder 7. The storage cylinder 9 is used to place the storage trays 10 in layers. The storage cylinder 9 includes a storage cylinder body 91, which is a hollow cylindrical shape. Heat exchange holes 92 are evenly opened from top to bottom around the outer wall of the storage cylinder body 91. Support rings 93 are evenly arranged from top to bottom on the inner wall of the storage cylinder body 91. The outer wall of the support rings 93 is fixedly connected to the inner wall of the storage cylinder body 91. The upper support rings 93 of the storage cylinder body 91 are spaced apart from the top of the storage cylinder body 91, and the bottom support rings 93 of the storage cylinder body 91 are spaced apart from the bottom of the storage cylinder body 91. Placement slots 94 are symmetrically opened at equal angles on the surface of the support rings 93. Lifting rods 95 are symmetrically arranged on the upper surface of the top support rings 93 inside the storage cylinder body 91. The lifting rods 95 are higher than the upper part of the storage cylinder body 91. The outer diameter of the storage cylinder body 91 is smaller than the inner diameter of the storage cavity 72.

[0066] The aforementioned arrangement of the storage cylinder body 91 and heat exchange holes 92 provides, on the one hand, a space for the storage tray 10 to be suspended and placed in multiple layers, and on the other hand, a uniform heat exchange space required for the low-temperature stratification treatment of the storage tray 10 and the peony seeds.

[0067] The aforementioned support ring 93 provides support for the placement of the storage tray 10. The aforementioned placement groove 94, and the corresponding upper and lower cooperation between the placement groove 94 and the support block 103 on the storage tray 10, allows the storage tray body 101 to be smoothly placed on the support ring 93 at the bottom of the storage cylinder body 91, thereby realizing multi-layer placement of the storage tray body 101.

[0068] The aforementioned lifting rod 95 facilitates the placement and retrieval of the storage cylinder body 91 within the storage cavity 72. The structural feature that the outer diameter of the storage cylinder body 91 is smaller than the inner diameter of the storage cavity 72 allows for the formation of a space between the storage cylinder body 91 and the storage cavity 72 for geothermal convection heat transfer. This serves two purposes: firstly, it facilitates convection heat transfer; secondly, it further homogenizes the heat flow.

[0069] The upper support ring 93 of the storage cylinder body 91 is spaced apart from the top of the storage cylinder body 91, and the lower support ring 93 of the storage cylinder body 91 is spaced apart from the bottom of the storage cylinder body 91. The main purpose of this arrangement is that when the storage tray 10 is placed on the support ring 93, the storage tray 10 at the top of the storage cylinder body 91 and the top of the storage cavity 72 form a heat exchange and ventilation cavity, and at the same time, the storage tray 10 at the bottom of the storage cylinder body 91 and the bottom of the storage cavity 72 form a heat exchange and ventilation cavity. On the one hand, when the oxygen supply mechanism 8 supplies oxygen to the storage cavity 72 at regular intervals, the oxygen passes through multiple storage trays 10 from bottom to top; on the other hand, it facilitates the convective heat exchange of geothermal heat with multiple storage trays 10.

[0070] like Figure 3 and 9 As shown, the storage tray 10 is placed inside the storage cylinder 9. The storage tray 10 is used to lay a sand layer and place peony seeds. The storage tray 10 includes a storage tray body 101, which is a hollow disc with an open top and a closed bottom. Ventilation holes 102 are evenly opened at the bottom of the storage tray body 101. Support blocks 103 are symmetrically fixed on the outer circumferential wall of the storage tray body 101. The size of the support block 103 is equal to the size of the placement groove 94.

[0071] With the storage tray body 101, ventilation hole 102 and support block 103 configured as described above, when the support block 103 is aligned vertically with the placement groove 94 on the support ring 93, the storage tray body 101 is moved downwards. When the storage tray body 101 moves to the upper position of the support ring 93 where it is to be placed, the storage tray body 101 is rotated to displace the support block 103 from the placement groove 94, and the storage tray body 101 is placed on the support ring 93 where it is to be placed.

[0072] The above-mentioned ventilation holes 102 are provided on the storage pan body 101. The diameter of the ventilation holes 102 is smaller than the diameter of the sand. The main purpose of this setting is: on the one hand, to prevent the sand layer laid on the storage pan body 101 from falling off; on the other hand, with the cooperation of the ventilation holes 102 and the gap between the sand layer, it can play the role of oxygen exchange and at the same time allow geothermal heat to pass through smoothly.

[0073] like Figure 1-9 As shown in Example 1, a method for overwintering peony seeds in high-altitude and cold regions:

[0074] Step 1: Sand mixing, sand layer laying, and peony seed placement: Mix the sand with water using a small mixer, controlling the sand moisture content to 60%; First, lay a 2cm thick layer of sand with 60% moisture content at the bottom of the storage tray body 101 of the storage tray 10; then, evenly scatter the selected, plump, and uniformly sized peony seeds from the current year onto the sand at the bottom of the storage tray body 101; finally, lay a 1.2cm thick layer of sand on top of the peony seeds.

[0075] Step 2: Combining and placing the storage cylinder and storage tray: Clamp the storage tray 10 from Step 1 with a clamp and align it concentrically with the storage cylinder body 91 of the storage cylinder 9. Simultaneously, align the support block 103 on the outer wall of the storage tray 10 with the placement groove 94 of the support ring 93 inside the storage cylinder body 91. Then, move the storage tray 10 downwards along the center of the storage cylinder body 91 to the top of the support ring 93 at the bottom of the storage cylinder body 91. At this point, rotate the storage tray 10 with the clamp, and offset the support block 103 from its corresponding position in the placement groove 94. Place the storage tray 10 on the support ring 93 at the bottom of the storage cylinder body 91 and release the clamp. Then, follow the above steps to place one storage tray 10 on each support ring 93 inside the storage cylinder body 91. Finally, the operator lifts the lifting rod 95 and places the storage cylinder 9 and storage tray 10 into the storage cavity 72 of the insulation cylinder 7.

[0076] Step 3: Passive geothermal heating of the insulation cylinder: Liquid ammonia in the closed tube 61 of the passive heating mechanism 6 absorbs the heat from the geothermal layer 14 and vaporizes to produce ammonia vapor. When the ammonia vapor rises to the upper part of the closed tube 61, it condenses upon contact with the cold inner wall of the closed tube 61. At the same time, the ammonia vapor releases heat to heat the upper part of the closed tube 61. After condensation, the ammonia vapor flows back down along the spiral groove 610 on the inner wall of the closed tube 61 due to gravity until it reaches the bottom of the closed tube 61, thus forming a cycle of liquid ammonia absorption, vaporization, condensation, and return. The heat in the upper part of the closed tube 61 is efficiently dissipated to the heat equalization chamber 73 through the spiral heat dissipation fins 69, and further convected to the storage chamber 72 through the heat dissipation holes 74. At this time, the geothermal heat is convected to the sand layer in the storage pan 10 through the heat exchange holes 92 on the storage cylinder body 91, providing a constant 4°C low temperature sand layer accumulation temperature in the storage chamber 72 of the insulation cylinder 7.

[0077] Step 4: Timed oxygen supply, automatic humidity control, and real-time temperature monitoring in the insulation cylinder: When the temperature and humidity sensor 12 detects that the humidity threshold of the sand layer is less than 60%, the sensor sends the detected sand layer humidity to the PLC control module 55. After receiving the sand layer humidity value, the PLC control module 55 sends an opening control command to the solenoid valve at the water supply pump outlet. The water supply pump delivers water to the atomizing nozzle 11 through a high-pressure water pipe. After atomization by the atomizing nozzle 11, the water is sprayed onto the sand layer on the storage tray 10, thereby increasing the humidity of the sand layer. When the temperature and humidity sensor 12 detects that the sand layer humidity is greater than 70%, the PLC control module 55 sends a closing control command to the solenoid valve at the water supply pump outlet, and the atomizing nozzle 11 stops spraying water. When the oxygen supply mechanism 8 reaches the delay control time, the PLC control module 55... A control command to start the fan 84 motor is sent, and the fan 84 begins to rotate. Under the action of the high-speed rotation of the fan 84, an upward suction force is formed in the air hood 83 and the insulation cylinder body 71. The upward suction force formed by the air hood 83 compresses the micro-motion spring in the one-way valve 1. At this time, the valve core pressed by the micro-motion spring opens. At the same time, the upward suction force formed by the air hood 83 compresses the micro-motion spring in the one-way valve 2 82, and the valve core opens. The outside air is delivered to the insulation cylinder body 71 through the one-way valve 2 82. After the fan 84 motor continues to rotate at high speed for 2 minutes, the PLC control module 55 sends a control command to stop the rotation of the fan 84 motor. The fan 84 stops working, and the entire oxygen supply operation is completed. The temperature and humidity sensor 12 simultaneously detects the temperature of the storage chamber 72 of the insulation cylinder 7 in real time and displays the temperature value on the display screen 54 in real time.

[0078] Step 5: Low-temperature sand storage time for peony seeds: Under the conditions of passive geothermal heating in Step 3 and timed oxygenation, automatic control of sand layer humidity, and real-time temperature monitoring in Step 4, peony seeds will be stored in low-temperature sand until March of the following spring.

[0079] like Figure 1-9 As shown in Example 2, a method for overwintering peony seeds in high-altitude and cold regions:

[0080] Step 1: Sand mixing, sand layer laying, and peony seed placement: The sand is mixed with water using a small mixer, and the sand moisture content is controlled at 65%. First, a layer of sand with a moisture content of 65% and a thickness of 2.5 cm is laid at the bottom of the storage tray body 101 of the storage tray 10. Then, the selected plump and uniform-sized peony seeds of the current year are evenly scattered on the sand laid at the bottom of the storage tray body 101. Finally, a layer of sand with a thickness of 1.6 cm is laid on top of the peony seeds.

[0081] Step 2: Combining and placing the storage cylinder and storage tray: Clamp the storage tray 10 from Step 1 with a clamp and align it concentrically with the storage cylinder body 91 of the storage cylinder 9. Simultaneously, align the support block 103 on the outer wall of the storage tray 10 with the placement groove 94 of the support ring 93 inside the storage cylinder body 91. Then, move the storage tray 10 downwards along the center of the storage cylinder body 91 to the top of the support ring 93 at the bottom of the storage cylinder body 91. At this point, rotate the storage tray 10 with the clamp, and offset the support block 103 from its corresponding position in the placement groove 94. Place the storage tray 10 on the support ring 93 at the bottom of the storage cylinder body 91 and release the clamp. Then, follow the above steps to place one storage tray 10 on each support ring 93 inside the storage cylinder body 91. Finally, the operator lifts the lifting rod 95 and places the storage cylinder 9 and storage tray 10 into the storage cavity 72 of the insulation cylinder 7.

[0082] Step 3: Passive geothermal heating of the insulation cylinder: Liquid ammonia in the closed tube 61 of the passive heating mechanism 6 absorbs the heat from the geothermal layer 14 and vaporizes to produce ammonia vapor. When the ammonia vapor rises to the upper part of the closed tube 61, it condenses upon contact with the cold inner wall of the closed tube 61. At the same time, the ammonia vapor releases heat to heat the upper part of the closed tube 61. After condensation, the ammonia vapor flows back down along the spiral groove 610 on the inner wall of the closed tube 61 due to gravity until it reaches the bottom of the closed tube 61, thus forming a cycle of liquid ammonia absorption, vaporization, condensation, and return. The heat from the upper part of the closed tube 61 is efficiently dissipated to the heat equalization chamber 73 through the spiral heat dissipation fins 69, and further convected to the storage chamber 72 through the heat dissipation holes 74. At this time, the geothermal heat is convected to the sand layer in the storage pan 10 through the heat exchange holes 92 on the storage cylinder body 91, providing a constant low temperature of 4.5℃ for the sand layer in the storage chamber 72 of the insulation cylinder 7.

[0083] Step 4: Timed oxygenation, automatic humidity control, and real-time temperature monitoring in the insulation cylinder: When the temperature and humidity sensor 12 detects that the humidity threshold of the sand layer (pre-set via touch keys on the human-machine interface display 54, with a range of 60%~70%) is less than 60%, the sensor 12 sends the detected sand layer humidity to the PLC control module 55. Upon receiving the humidity value, the PLC control module 55 sends an opening control command to the solenoid valve at the water supply pump outlet. The water supply pump then delivers water to the atomizing nozzle 11 via a high-pressure water pipe. The water is atomized by the nozzle 11 and sprayed onto the sand layer in the storage pan 10, thereby increasing the sand layer's humidity. When the temperature and humidity sensor 12 detects that the sand layer humidity is greater than 70%, the PLC control module 55 sends a closing control command to the solenoid valve at the water supply pump outlet, and the atomizing nozzle 11 stops spraying water. After the oxygen supply mechanism 8 reaches the delay control time, the PLC control module 55 sends a control command to the fan 84 motor to start. The fan 84 starts to rotate. Under the action of the high-speed rotation of the fan 84, an upward suction force is formed in the air hood 83 and the insulation cylinder body 71. The upward suction force formed by the air hood 83 compresses the micro spring in the one-way valve 1 81. At this time, the valve core pressed by the micro spring opens. At the same time, the upward suction force formed by the air hood 83 compresses the micro spring in the one-way valve 2 82 and opens the valve core. The outside air delivers oxygen to the insulation cylinder body 71 through the one-way valve 2 82. After the fan 84 motor continues to rotate at high speed for 2 minutes, the PLC control module 55 sends a control command to the fan 84 motor to stop rotating. The fan 84 stops working, and the entire oxygen supply action is completed. The temperature and humidity sensor 12 simultaneously detects the temperature of the storage chamber 72 of the insulation cylinder 7 in real time and displays the temperature value on the display screen 54 in real time.

[0084] Step 5: Low-temperature sand storage time for peony seeds: Under the conditions of passive geothermal heating in Step 3 and timed oxygenation, automatic control of sand layer humidity, and real-time temperature monitoring in Step 4, peony seeds will be stored in low-temperature sand until mid-March of the following spring.

[0085] like Figure 1-9 As shown in Example 3, a method for overwintering peony seeds in high-altitude and cold regions:

[0086] Step 1: Sand mixing, sand layer laying, and peony seed placement: Mix the sand with water using a small mixer, controlling the sand moisture content to 70%; First, lay a 3cm thick layer of sand with 70% moisture content at the bottom of the storage tray body 101 of the storage tray 10; then, evenly scatter the selected, plump, and uniformly sized peony seeds from the current year onto the sand at the bottom of the storage tray body 101; finally, lay a 2cm thick layer of sand on top of the peony seeds.

[0087] Step 2: Combining and placing the storage cylinder and storage tray: Clamp the storage tray 10 from Step 1 with a clamp and align it concentrically with the storage cylinder body 91 of the storage cylinder 9. Simultaneously, align the support block 103 on the outer wall of the storage tray 10 with the placement groove 94 of the support ring 93 inside the storage cylinder body 91. Then, move the storage tray 10 downwards along the center of the storage cylinder body 91 to the top of the support ring 93 at the bottom of the storage cylinder body 91. At this point, rotate the storage tray 10 with the clamp, and offset the support block 103 from its corresponding position in the placement groove 94. Place the storage tray 10 on the support ring 93 at the bottom of the storage cylinder body 91 and release the clamp. Then, follow the above steps to place one storage tray 10 on each support ring 93 inside the storage cylinder body 91. Finally, the operator lifts the lifting rod 95 and places the storage cylinder 9 and storage tray 10 into the storage cavity 72 of the insulation cylinder 7.

[0088] Step 3: Passive geothermal heating of the insulation cylinder: Liquid ammonia in the closed tube 61 of the passive heating mechanism 6 absorbs the heat from the geothermal layer 14 and vaporizes to produce ammonia vapor. When the ammonia vapor rises to the upper part of the closed tube 61, it condenses upon contact with the cold inner wall of the closed tube 61. At the same time, the ammonia vapor releases heat to heat the upper part of the closed tube 61. After condensation, the ammonia vapor flows back down along the spiral groove 610 on the inner wall of the closed tube 61 due to gravity until it reaches the bottom of the closed tube 61, thus forming a cycle of liquid ammonia absorption, vaporization, condensation, and return. The heat in the upper part of the closed tube 61 is efficiently dissipated to the heat equalization chamber 73 through the spiral heat dissipation fins 69, and further convected to the storage chamber 72 through the heat dissipation holes 74. At this time, the geothermal heat is convected to the sand layer in the storage pan 10 through the heat exchange holes 92 on the storage cylinder body 91, providing a constant 5°C low temperature sand layer accumulation temperature in the storage chamber 72 of the insulation cylinder 7.

[0089] Step 4: Timed oxygen supply, automatic humidity control, and real-time temperature monitoring in the insulation cylinder: When the temperature and humidity sensor 12 detects that the humidity threshold of the sand layer (pre-set via touch keys on the human-machine interface display 54, ranging from 60% to 70%) is less than 60%, the sensor sends the detected sand layer humidity to the PLC control module 55. Upon receiving the humidity value, the PLC control module 55 sends an opening control command to the solenoid valve at the water supply pump outlet. The water supply pump delivers water to the atomizing nozzle 11 via a high-pressure water pipe. The water is then atomized by the nozzle and sprayed onto the sand layer in the storage tray 10, increasing the sand layer's humidity. When the temperature and humidity sensor 12 detects that the sand layer humidity is greater than 70%, the PLC control module 55 sends a closing control command to the solenoid valve at the water supply pump outlet, and the atomizing nozzle 11 stops spraying water. When the oxygen supply machine… After the delay control time is reached, the PLC control module 55 sends a control command to the fan 84 motor to start. The fan 84 starts to rotate. Under the action of the high-speed rotation of the fan 84, an upward suction force is formed in the air cover 83 and the insulation cylinder body 71. The upward suction force formed by the air cover 83 compresses the micro spring in the one-way valve 1. At this time, the valve core pressed by the micro spring opens. At the same time, the upward suction force formed by the air cover 83 compresses the micro spring in the one-way valve 2 and opens the valve core. The outside air delivers oxygen to the insulation cylinder body 71 through the one-way valve 2. After the fan 84 motor continues to rotate at high speed for 2 minutes, the PLC control module 55 sends a control command to the fan 84 motor to stop rotating. The fan 84 stops working, and the entire oxygen supply action is completed. The temperature and humidity sensor 12 simultaneously detects the temperature of the storage chamber 72 of the insulation cylinder 7 in real time and displays the temperature value on the display screen 54 in real time.

[0090] Step 5: Low-temperature sand storage time for peony seeds: Under the conditions of passive geothermal heating in Step 3 and timed oxygenation, automatic control of sand layer humidity, and real-time temperature monitoring in Step 4, peony seeds will be stored in low-temperature sand until April of the following spring.

[0091] like Figure 1-9 As shown, the overwintering storage device for peony seeds in high-altitude and cold regions described in this invention has a passive heating mechanism whose closed tube 61 can be rotated and inserted into the open field with loose soil. The power supply for the human-machine interaction system 5, the oxygen supply mechanism 8, the water supply pump for supplying water to the atomizing nozzle 11, the solenoid valve, and the temperature and humidity sensor 12 can be provided by the temporary housing in the peony planting field.

[0092] Various modifications to the above embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be adapted to the widest extent consistent with the principles and novel features disclosed herein.

Claims

1. A winter storage device for peony seeds in high-altitude and cold regions, comprising a sheet metal box shell, a box lid, and a handle; the sheet metal box shell is a hollow cuboid with a closed lower part and an open upper part; the box lid is installed on the upper part of the sheet metal box shell; and the handle is fixedly located at the upper middle position of the box lid; characterized in that: The support cylinders are vertically fixed at the four bottom corners of the sheet metal shell; the human-machine interface system is fixedly located at the middle right side of the sheet metal shell, used for automatic control of the oxygen supply mechanism and atomizing nozzles, and automatically detecting the temperature and humidity inside the insulation cylinder; the passive heating mechanism is fixedly installed inside the support cylinder and extends into the insulation cylinder, utilizing geothermal energy to provide the required temperature for the low-temperature sand stratification treatment of peony seeds; the insulation cylinder is fixed inside the sheet metal shell and is used to house the storage cylinder; the oxygen supply mechanism is fixedly located between the sheet metal shell and the lid. At the center of the container, an oxygen supply mechanism provides oxygen to the interior of the insulation cylinder for the low-temperature sand stratification treatment of peony seeds. A storage cylinder is placed in the center of the insulation cylinder and is used to place storage trays in layers. Storage trays are placed inside the storage cylinder and are used to lay sand layers and place peony seeds. An atomizing nozzle is fixedly installed on the upper left side of the oxygen supply mechanism on the lid, extending to the bottom of the lid, and is used to atomize and spray water onto the storage trays. A temperature and humidity sensor is fixedly installed on the upper right side of the oxygen supply mechanism on the lid and is used to detect the temperature and humidity inside the insulation cylinder.

2. The overwintering storage device for peony seeds in high-altitude and cold regions according to claim 1, characterized in that: The support cylinder includes a support cylinder body, which is a hollow cylindrical shape with a protruding edge at the bottom. The inner ring is fixedly installed inside the support cylinder body near the bottom, and fixing holes are evenly opened on the circumferential surface of the inner ring. The interior of the support cylinder body is in communication with the sheet metal shell.

3. The overwintering storage device for peony seeds in high-altitude cold regions according to claim 1, characterized in that: The human-computer interaction system includes a fixed plate, which is fixedly installed at the middle right side of the sheet metal housing, and a support rod is fixedly installed horizontally and vertically on the right side surface of the fixed plate; the control panel is fixedly installed on the right side of the support rod, the display screen is installed at the front of the control panel, and the PLC control module is fixedly installed inside the rear of the control panel. The display screen and the PLC control module are fixedly connected via signal cables.

4. The overwintering storage device for peony seeds in high-altitude and cold regions according to claim 1, characterized in that: The passive heating mechanism includes a sealed tube, which is a seamless pressure-resistant tube, with a cap fixedly installed at the upper part of the sealed tube; a rotating handle fixedly installed in the cap, with a cone tip fixedly installed at the lower part of the sealed tube, the cone tip and the sealed tube being an integral structure; a spiral blade fixedly installed at the bottom of the sealed tube, with an insulation layer wrapped around the sealed tube above the spiral blade, the height of the insulation layer being greater than the height of the frozen soil layer; a fixed plate fixedly installed on the upper part of the insulation layer, the fixed plate being welded and fixed to the sealed tube, with connection holes evenly opened on the circumferential surface of the fixed plate; heat dissipation fins fixedly installed at the upper part of the sealed tube, the heat dissipation fins being spiral-shaped; and spiral grooves opened on the inner wall of the upper part of the sealed tube, extending from top to bottom to the upper part of the fixed plate.

5. The overwintering storage device for peony seeds in high-altitude and cold regions according to claim 1, characterized in that: The heat insulation cylinder includes a heat insulation cylinder body, which is square in shape. The storage cavity is located at the center of the heat insulation cylinder body and is circular with a closed bottom and an open top. The heat dissipation cavity is cylindrical with an open bottom and a closed top. The heat dissipation cavity is vertically located at the four corners of the heat insulation cylinder body. Each heat dissipation cavity has vertically and evenly distributed heat dissipation holes facing the center of the storage cavity.

6. The overwintering storage device for peony seeds in high-altitude and cold regions according to claim 1, characterized in that: The oxygen supply mechanism includes a first check valve and a second check valve. The first check valve is fixedly located at the center of the upper part of the box cover, and the second check valve is fixedly located at the center of the bottom of the sheet metal box shell. The air hood is a hollow square shape with an open bottom and a closed top, and is fixedly located at the center of the upper part of the box cover. The fan is fixedly located in the square mounting hole at the top of the air hood, and the four sides of the fan are coated with sealant. The oxygen vent is located at the center of the bottom of the insulation cylinder body, and the oxygen vent is vertically aligned with the second check valve. The connecting plate is figure-eight shaped, with four connecting plates located at the four corners of the upper part of the fan. The outer end of the connecting plate contacts the upper part of the air hood, and the front and rear ends of the connecting plate have through holes. Screws are used to pass through the front and rear through holes of the connecting plate and fix it to the upper part of the fan body or the air hood. The fan motor is fixedly connected to the PLC control module via a signal line.

7. The overwintering storage device for peony seeds in high-altitude and cold regions according to claim 1, characterized in that: The storage cylinder includes a storage cylinder body, which is a hollow cylindrical shape. Heat exchange holes are evenly distributed from top to bottom around the outer wall of the storage cylinder body, and the heat exchange holes are strip-shaped. Support rings are evenly distributed from top to bottom on the inner wall of the storage cylinder body, and the outer wall of the support rings is fixedly connected to the inner wall of the storage cylinder body. A distance is reserved between the upper support ring and the top of the storage cylinder body, and a distance is reserved between the bottom support ring and the bottom of the storage cylinder body. Placement slots are symmetrically distributed at equal angles on the surface of the support rings, and the placement slots between the support rings are vertically corresponding. Lifting rods are symmetrically arranged on the upper surface of the top support ring inside the storage cylinder body, and the lifting rods are higher than the upper part of the storage cylinder body. The outer diameter of the storage cylinder body is smaller than the inner diameter of the storage cavity.

8. The overwintering storage device for peony seeds in high-altitude and cold regions according to claim 1, characterized in that: The storage tray includes a storage tray body, which is a hollow disc with an open top and a closed bottom. Ventilation holes are evenly distributed at the bottom of the storage tray body. Support blocks are symmetrically fixed on the outer circumferential wall of the storage tray body. The size of the support blocks is equal to the size of the placement groove. The diameter of the ventilation holes is smaller than the diameter of the sand.

9. The overwintering storage device for peony seeds in high-altitude cold regions according to claim 1, characterized in that: A high-pressure water pipe is fixedly installed on the upper part of the atomizing nozzle. The other end of the high-pressure water pipe is fixedly connected to the solenoid valve on the water outlet of the water supply pump. The solenoid valve on the water outlet of the water supply pump is fixedly connected to the PLC control module through a signal line. The temperature and humidity sensor is fixedly connected to the PLC control module through a signal line.

10. A method for overwintering peony seeds in high-altitude and cold regions, characterized in that: Step 1: Sand mixing, sand layer laying, and peony seed placement: Mix the sand with water using a small mixer, maintaining a sand moisture content of 60%~70%. First, lay a 2cm~3cm thick layer of sand with a moisture content of 60%~70% at the bottom of the storage tray. Then, evenly scatter the selected, plump, and uniformly sized peony seeds from the current year onto the sand at the bottom of the storage tray. Finally, lay a 1.2cm~2cm thick layer of sand on top of the peony seeds. Step 2: Combining and placing the storage container and storage tray: Clamp the storage tray from Step 1 with a clamp, aligning it concentrically with the storage container. Simultaneously, place the storage tray... Align the support blocks on the outer wall with the placement slots of the support rings inside the storage cylinder body. Then, move the storage tray downwards along the center of the storage cylinder body to the top of the support ring at the bottom of the storage cylinder body. At this point, use a clamp to rotate the storage tray, offsetting the support blocks from their corresponding positions in the placement slots. Place the storage tray on the support ring at the bottom of the storage cylinder body and release the clamp. Then, follow the above steps to place a storage tray on each support ring inside the storage cylinder body. Finally, the operator lifts the lifting rod and places the storage cylinder and storage trays into the storage cavity of the insulation cylinder. Step 3: Passive geothermal heating of the insulation cylinder: The liquid ammonia in the closed pipe of the passive heating mechanism absorbs the temperature heat of the geothermal layer and vaporizes to produce ammonia vapor. When ammonia vapor rises to the upper part of the closed tube, it condenses upon contact with the cold inner wall of the tube. Simultaneously, the ammonia vapor releases heat, heating the upper part of the tube. After condensation, the ammonia vapor flows downwards along the spiral grooves on the inner wall of the closed tube due to gravity, until it reaches the bottom of the tube, thus forming a cycle of liquid ammonia absorption, vaporization, and condensation. Heat from the upper part of the closed tube is efficiently dissipated to the heat equalization chamber through spiral heat dissipation fins, and further convected to the storage chamber through heat dissipation holes. At this point, the geothermal heat is convected to the sand layer in the storage pan through heat exchange holes on the storage cylinder body, providing a constant 4℃~5℃ low-temperature sand layer temperature in the storage chamber of the insulated cylinder. Step 4: Insulation... Automatic control of humidity and real-time temperature monitoring in the temperature cylinder: When the temperature and humidity sensor detects that the humidity threshold of the sand layer is less than 60%, the temperature and humidity sensor sends the detected sand layer humidity to the PLC control module. After receiving the sand layer humidity value, the PLC control module sends an opening control command to the solenoid valve at the outlet of the water supply pump. The water supply pump delivers water to the atomizing nozzle through the high-pressure water pipe. After atomization by the atomizing nozzle, the water is sprayed onto the sand layer on the storage tray, thereby increasing the humidity of the sand layer. When the temperature and humidity sensor detects that the sand layer humidity is greater than 70%, the PLC control module sends a closing control command to the solenoid valve at the outlet of the water supply pump after receiving the sand layer humidity value, and the atomizing nozzle stops spraying water.When the oxygen supply mechanism reaches the delay control time, the PLC control module sends an on control command to the fan motor, and the fan starts to rotate. Under the action of the high-speed rotation of the fan, an upward suction force is formed in the air hood and the insulation cylinder body. The upward suction force formed by the air hood compresses the micro-motion spring in one-way valve one. At this time, the valve core pressed by the micro-motion spring opens. At the same time, the upward suction force formed by the air hood compresses the micro-motion spring in one-way valve two, and the valve core opens. The outside air is delivered to the insulation cylinder body through one-way valve two. After the fan motor continues to rotate at high speed for 2 minutes, the PLC control module sends a stop control command to the fan motor, and the fan stops working. The entire oxygen supply action is completed. The temperature and humidity sensor simultaneously detects the temperature of the storage chamber of the insulation cylinder in real time and displays the temperature value on the display screen in real time. Step 5, Low-temperature sand storage time of peony seeds: Under the conditions of passive geothermal heating in step 3 and timed oxygenation, automatic control of sand layer humidity and real-time temperature monitoring in step 4, the peony seeds are stored in low-temperature sand until March or April of the following year.

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