Seed processing and drying device

Abstract

The seed processing and drying device comprises a combined shell, a feeding assembly, a heating mechanism and an auger conveying piece, an eccentric vibration motor is installed at the bottom of the combined shell, and a plurality of spherical heat-conducting media are arranged in the combined shell; the feeding assembly is connected with the combined shell, and one end of the feeding assembly extends into the combined shell; the heating mechanism is arranged on the outer side close to the bottom of the combined shell; the auger conveying piece is connected with the combined shell, and one end of the auger conveying piece extends to the position close to the inner bottom wall of the combined shell. An opening is formed in the outer wall, close to the bottom end, of the auger conveying piece; a plurality of first through holes are formed in the outer wall of the auger conveying piece, and a plurality of second through holes are formed in a spiral blade of the auger conveying piece. According to the seed processing and drying device disclosed by the embodiment of the invention, the spherical heat-conducting medium is in moving, mixing and contact with the seeds, so that local overheating is avoided, and the processing quality of the seeds is ensured.

Description

Technical Field

[0001] This application relates to the field of seed processing technology, and in particular to a seed processing drying apparatus. Background Technology

[0002] Seed processing is the core process for achieving the commercialization, standardization, and high quality of seeds. Drying, as a crucial link in the processing chain, is essential and directly affects seed viability, storage safety, and final crop yield. The purpose of seed drying is to reduce seed moisture content below a safe level, forcing them into dormancy and thus maximizing viability.

[0003] Currently, moving bed hot air drying technology is widely used in seed processing and applied in box-type, tower-type, or flat-bed drying equipment. However, because the seeds are in a relatively static state inside the drying equipment, temperature gradients can easily form, leading to uneven drying or localized overheating, which in turn affects the processing quality of the seeds. Summary of the Invention

[0004] This application aims to at least partially solve one of the technical problems in the aforementioned technologies.

[0005] Therefore, one objective of this application is to provide a seed processing and drying device that uses a spherical heat-conducting medium to move and mix with the seeds, thereby avoiding localized overheating and ensuring the quality of seed processing.

[0006] To achieve the above objectives, a first aspect of this application provides a seed processing and drying apparatus, comprising: a combined shell, a feeding assembly, a heating mechanism, and an auger conveyor. The combined shell has an eccentric vibration motor mounted at its bottom, and a plurality of spherical heat-conducting media disposed inside. The feeding assembly is connected to the combined shell, with one end extending into the interior of the combined shell. The heating mechanism is disposed on the outer side near the bottom of the combined shell. The auger conveyor is connected to the combined shell, with one end extending near the bottom of the combined shell. The inner bottom wall of the combined housing; the outer wall of the auger conveyor near the bottom end is provided with an opening; the outer wall of the auger conveyor is provided with multiple first through holes, and the spiral blades of the auger conveyor are provided with multiple second through holes. The diameters of the first through holes and the second through holes are equal and larger than the diameter of the spherical heat-conducting medium, but smaller than the minor diameter of the seed; a blower is installed on the combined housing, and the air outlet pipe of the blower is connected to the auger conveyor. The multiple second through holes extend to the air outlet pipe of the blower; a discharge pipe is connected to the outer wall of the auger conveyor near the top end.

[0007] In addition, the seed processing and drying apparatus proposed in the above embodiments of this application may also have the following additional technical features: Furthermore, the combined housing includes an upper cover, a first connecting ring, and a lower cover, wherein the upper cover and the lower cover are connected by the first connecting ring; the eccentric vibration motor and the heating mechanism are respectively mounted on the lower cover, and the plurality of spherical heat-conducting media are placed inside the lower cover; the auger conveyor, the blower, and the feeding assembly are respectively connected to the upper cover.

[0008] Furthermore, it also includes a fabric assembly, which includes a drive motor, a transmission component, a fabric plate, and multiple connecting rods. The drive motor is mounted on the upper cover. The transmission component and the fabric plate are rotatably connected to the auger conveyor, and the transmission component is connected to the output shaft of the drive motor. The transmission component and the fabric plate are connected through the multiple connecting rods. The fabric plate is located above the multiple spherical heat-conducting media, and there is a gap between the fabric plate and the lower cover. The lower edges of the fabric plate and the first and second through holes are on the same horizontal plane.

[0009] Furthermore, the fabric plate is arranged in a bucket-shaped structure inside the lower cover.

[0010] Furthermore, the heating mechanism includes an outer casing, a second connecting ring, and a heating component, wherein the outer casing is sleeved on the outside of the lower casing, and the outer casing and the lower casing are connected by two second connecting rings; the heating component is installed inside the outer casing.

[0011] Furthermore, the feeding assembly includes a material collection trough, a material guide pipe, and an automatic closing component, wherein one end of the material guide pipe extends into the interior of the combined housing, and the other end of the material guide pipe is arranged close to the auger conveyor and the material distribution plate; the material collection trough is connected to the other end of the material guide pipe; and the automatic closing component is installed at the connection between the material collection trough and the material guide pipe.

[0012] Furthermore, an air extractor is installed on the combined housing, the air inlet of the air extractor is connected to a pipe, one end of the pipe is connected to the feed pipe, and a solenoid valve is installed on the pipe.

[0013] Furthermore, the lower cover is provided with a heat-conducting part, and a first heat-insulating part and a second heat-insulating part are provided above and below the heat-conducting part, respectively. The first connecting ring and a second connecting ring are connected to the first heat-insulating part, and the other second connecting ring is connected to the second heat-insulating part.

[0014] 1. The seed processing and drying device of this application embodiment uses an eccentric vibration motor running at the bottom of the combined shell. The spherical heat-conducting medium and the seeds continuously move around, so that the two are mixed and fully contacted, avoiding local overheating. The medium moves towards the bottom of the auger conveyor, where the heat-conducting medium and the seeds can be separated, thereby ensuring the processing quality of the seeds.

[0015] 2. The seed processing and drying apparatus of this application embodiment achieves the first drying by heat transfer between the spherical heat-conducting medium and the seeds, and then injects air into the auger conveyor by a blower, and the air sweeps over the surface of the seeds to achieve the second drying, thereby improving the seed processing efficiency.

[0016] 3. The seed processing and drying apparatus of this application integrates feeding, drying and discharging into one process, and each step does not affect the others and can be carried out simultaneously, thereby further improving the seed processing efficiency.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a three-dimensional structural diagram of a seed processing and drying apparatus according to an embodiment of this application; Figure 2 This is a schematic cross-sectional view of a seed processing and drying apparatus according to an embodiment of this application. Figure 1 ; Figure 3 This is a schematic diagram of the connection structure between the auger conveyor and the fabric assembly in a seed processing and drying apparatus according to an embodiment of this application; Figure 4 This is a schematic cross-sectional view of a seed processing and drying apparatus according to an embodiment of this application. Figure 2 ; Figure 5 This is a schematic diagram of the connection structure between the feeding assembly and the vacuum pump in a seed processing and drying apparatus according to an embodiment of this application; Figure 6 This is a schematic diagram of the lower cover structure in a seed processing and drying apparatus according to an embodiment of this application.

[0019] Reference numerals: 1. Combined housing; 11. Eccentric vibrating motor; 12. Spherical heat-conducting medium; 13. Upper cover; 14. First connecting ring; 15. Lower cover; 151. Heat-conducting part; 152. First heat-insulating part; 153. Second heat-insulating part; 2. Feeding assembly; 21. Collection trough; 22. Guide pipe; 23. Automatic closing component; 3. Heating mechanism; 31. Outer cover; 32. Second connecting ring; 33. Heating component; 4. Screw conveyor; 41. Opening; 42. First through hole; 43. Second through hole; 44. Blower; 45. Discharge pipe; 5. Fabric feeding assembly; 51. Drive motor; 52. Transmission component; 53. Fabric feeding plate; 54. Connecting rod; 61. Air extractor; 62. Pipe body; 63. Solenoid valve. Detailed Implementation

[0020] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0021] The seed processing and drying apparatus of this application is described below with reference to the accompanying drawings.

[0022] like Figures 1-6 As shown, the seed processing and drying apparatus of this application embodiment may include: a combined housing 1, a feeding assembly 2, a heating mechanism 3, and an auger conveyor 4.

[0023] The bottom of the combined housing 1 is equipped with an eccentric vibration motor 11, and the interior of the combined housing 1 is provided with multiple spherical heat-conducting media 12.

[0024] It should be noted that the spherical heat-conducting medium 12 described in this embodiment can be an alumina / ceramic ball, which is made of an inert material, has an extremely smooth surface, uniform spherical particles, and its density can be selected as needed. It can be reused and also has the advantages of high specific heat capacity and strong thermal conductivity.

[0025] The feeding assembly 2 is connected to the combined housing 1. One end of the feeding assembly 2 extends into the interior of the combined housing 1. The feeding assembly 2 is used to provide the seeds to be dried into the interior of the combined housing 1 at a preset feeding speed.

[0026] The heating mechanism 3 is located on the outside near the bottom of the combined housing 1.

[0027] The auger conveyor 4 is connected to the combined housing 1, and one end of the auger conveyor 4 extends to the inner bottom wall near the combined housing 1.

[0028] It should be noted that, in this embodiment, one end of the auger conveyor 4 and the inner bottom wall of the combined housing 1 are left with a space for the combined housing 1 to vibrate, and the two will not interfere with each other during operation.

[0029] An opening 41 is provided on the outer wall near the bottom of the auger conveyor 4, through which the dried seeds and the spherical heat-conducting medium 12 can enter the interior of the auger conveyor 4.

[0030] The outer wall of the auger conveyor 4 is provided with multiple first through holes 42, and the spiral blades of the auger conveyor 4 are provided with multiple second through holes 43. The diameters of the first through holes 42 and the second through holes 43 are equal and larger than the diameter of the spherical heat-conducting medium 12, but smaller than the short diameter of the seed.

[0031] It should be noted that the first through hole 42 and the second through hole 43 allow the seeds to be separated from the spherical heat-conducting medium 12, and allow air generated by the blower 44 to pass through, so as to achieve the purpose of secondary drying.

[0032] A blower 44 is installed on the combined housing 1. The air outlet pipe of the blower 44 is connected to the auger conveyor 4. Multiple second through holes 43 extend to the air outlet pipe of the blower 44.

[0033] The auger conveyor 4 has a discharge pipe 45 connected to its outer wall near the top.

[0034] Specifically, relevant technicians use this seed processing and drying device to dry seeds (e.g., wheat, corn, or soybeans) that are about to be stored.

[0035] First, the material is fed into the feed assembly 2 using an external feeding device (e.g., a conveying auger). Under the action of gravity, the seeds to be dried fall onto the spherical heat-conducting medium 12.

[0036] An external control device (not shown in the figure) sends an operation signal to this device, and the heating mechanism 3 operates. The heating mechanism 3 raises the temperature of the spherical heat-conducting medium 12 to a preset temperature (e.g., 45℃-50℃, which can be obtained by a temperature sensor).

[0037] Afterwards, the eccentric vibration motor 11 starts to run. The eccentric block of the eccentric vibration motor 11 generates centrifugal force, which drives the lower half of the combined shell 1 to perform three-dimensional elliptical vibration. The seeds and the spherical heat-conducting medium 12 form a "fluidized bed" effect. The two rise along the inner wall of the combined shell 1 and settle in the center. During this process, the seeds and the spherical heat-conducting medium 12 move slowly and uniformly, so that the two are mixed evenly and in full contact, thereby avoiding local overheating and ensuring the processing quality of the seeds.

[0038] The external control device sends an operating signal to the auger conveyor 4. When the seeds and spherical heat-conducting medium 12 move to the opening 41 of the auger conveyor 4, they move upward under the action of the auger conveyor 4. Since the diameters of the first through hole 42 and the second through hole 43 are equal and larger than the diameter of the spherical heat-conducting medium 12 but smaller than the short diameter of the seeds, a portion of the spherical heat-conducting medium 12 is screened out through the first through hole 42 and returns directly to the interior of the combined shell 1. The remaining spherical heat-conducting medium 12 is screened out through the second through hole 43 under the action of gravity as it moves with the auger conveyor 4, and then returns to the interior of the combined shell 1 through the first through hole 42, so that the spherical heat-conducting medium 12 is completely separated from the seeds. After the seeds are transported to the discharge pipe 45, they enter the external collection device for temporary storage.

[0039] In addition, as the seeds move within the auger conveyor 4, the blower 44 injects low-temperature air into the auger conveyor 4. The air passes over the surface of the seeds, thereby drying them again, which improves the drying efficiency and ensures the quality of seed drying.

[0040] After the seeds are dried, relevant technicians can measure their moisture content again. If it meets the preset value (e.g., 8%-15%), the seeds can be packaged and stored. If it does not meet the preset value, the above steps can be repeated to dry the seeds again.

[0041] As a possible scenario, to prevent seeds from remaining in the middle of multiple spherical heat-conducting media 12 for a long time and failing to enter the auger conveyor 4 in time, an annular body (not shown in the figure) can be provided inside the combined housing 1. The annular body occupies the middle space between the combined housing 1 and the auger conveyor 4, allowing the seeds and spherical heat-conducting media 12 to move around the annular body and then enter the auger conveyor 4.

[0042] In one embodiment of this application, such as Figure 2 As shown, the combined housing 1 includes an upper cover 13, a first connecting ring 14, and a lower cover 15.

[0043] The upper cover 13 and the lower cover 15 are connected by a first connecting ring 14. The eccentric vibration motor 11 and the heating mechanism 3 are respectively installed on the lower cover 15. Multiple spherical heat-conducting media 12 are placed inside the lower cover 15. The auger conveyor 4, the blower 44 and the feeding assembly 2 are respectively connected to the upper cover 13.

[0044] It should be noted that the material of the first connecting ring 14 described in this embodiment can be polytetrafluoroethylene-Teflon, which has a certain degree of flexibility and high temperature resistance, and can adapt to the high-frequency vibration of the lower cover 15.

[0045] In addition, the upper cover 13 described in this embodiment is connected to the frame, and the eccentric vibration motor 11 is mounted on the frame.

[0046] In one embodiment of this application, such as Figure 3 The seed processing and drying device also includes a cloth assembly 5, which includes a drive motor 51, a transmission component 52, a cloth plate 53, and multiple connecting rods 54.

[0047] The drive motor 51 is mounted on the upper cover 13, the transmission component 52 and the cloth plate 53 are rotatably connected to the auger conveyor 4, and the transmission component 52 is connected to the output shaft of the drive motor 51.

[0048] The transmission component 52 is connected to the fabric plate 53 via multiple connecting rods 54.

[0049] It should be noted that the transmission component 52 described in this embodiment may include a drive gear and a gear ring. The gear ring and the cloth plate 53 are rotatably connected to the auger conveyor 4 through bearings. Its working principle and connection structure have been disclosed in the prior art, so they will not be described in detail here.

[0050] The fabric plate 53 is located above the plurality of spherical heat-conducting media 12. There is a gap between the fabric plate 53 and the lower cover 15. The lower edges of the fabric plate 53, the first through hole 42, and the second through hole 43 are on the same horizontal plane.

[0051] Specifically, on the one hand, the seeds fall onto the cloth plate 53 through the feeding component 2, and on the other hand, the spherical heat-conducting medium 12 sieved through the first through hole 42 also falls onto the cloth plate 53. Under the action of the drive motor 51, the transmission component 52 and multiple connecting rods 54, the cloth plate 53 rotates, thereby conveying the seeds and the spherical heat-conducting medium 12 through the gap to the edge of the lower cover 15. After that, the seeds are covered by the spherical heat-conducting medium 12 and move towards the opening 41.

[0052] As a possible scenario, in order to ensure that the seeds are evenly dispersed after entering the lower cover 15, the drive motor 51 can adopt a variable speed operation mode, using different magnitudes of centrifugal force to disperse the seeds around the lower cover 15.

[0053] In one embodiment of this application, such as Figure 4 As shown, the fabric plate 53 is arranged in a bucket shape inside the lower cover 15.

[0054] Understandably, on the one hand, the material distribution plate 53 arranged in a bucket shape has the function of guiding the material, and on the other hand, its bucket shape also has the function of accumulating heat, thereby reducing heat loss and achieving the purpose of energy saving.

[0055] In one embodiment of this application, such as Figure 4As shown, the heating mechanism 3 includes an outer casing 31, a second connecting ring 32, and a heating component 33.

[0056] The outer casing 31 is fitted onto the outside of the lower casing 15, and the outer casing 31 and the lower casing 15 are connected by two second connecting rings 32. The heating element 33 is installed inside the outer casing 31.

[0057] It should be noted that the second connecting ring 32 described in this embodiment is made of the same material as the first connecting ring 14. It can satisfy the effects of connection and heat preservation, and can also avoid interference with the lower cover 15.

[0058] In one embodiment of this application, such as Figure 5 As shown, the feeding assembly 2 includes a material collection trough 21, a material guide pipe 22, and an automatic closing component 23.

[0059] One end of the guide pipe 22 extends into the interior of the combined housing 1. The other end of the guide pipe 22 is arranged close to the auger conveyor 4 and the material distribution plate 53. The collection trough 21 is connected to the other end of the guide pipe 22. The automatic closing component 23 is installed at the connection between the collection trough 21 and the guide pipe 22.

[0060] It should be noted that the automatic closing component 23 described in this embodiment includes a baffle, a feeding plate, a rotating shaft, and a torsion spring. Its specific connection structure and working principle have been disclosed in the prior art, so they will not be described in detail here.

[0061] Understandably, the automatic closing component 23 can seal the feed pipe 22 to prevent outside air from entering the negative pressure environment of the feed pipe 22 through the collection trough 21 when the vacuum pump 61 is running.

[0062] In one embodiment of this application, such as Figure 2 and Figure 5 As shown, an air extractor 61 is installed on the combined housing 1. The air inlet of the air extractor 61 is connected to a pipe 62. One end of the pipe 62 is connected to the feed pipe 22. A solenoid valve 63 is installed on the pipe 62.

[0063] Understandably, during the movement of multiple spherical heat-conducting media 12, the humid and hot gas generated during the heat transfer process with the seeds enters the upper part of the combined shell 1. In addition, the air blown out by the blower 44 sweeps across the surface of the seeds, and the heat carried away by it gathers together with the humid and hot gas in the upper part of the combined shell 1.

[0064] Specifically, when the vacuum pump 61 is running, a negative pressure zone is formed inside the feed pipe 22. The hot and humid air that gathers at the top of the combined shell 1 enters the feed pipe 22 and undergoes heat transfer with the seeds that are about to enter the combined shell 1, thereby preheating the seeds and improving the heat utilization rate of the device.

[0065] As a possible scenario, a temperature and humidity sensor (not shown in the figure) is installed inside the combined housing 1. The temperature and humidity sensor and the solenoid valve 63 are respectively connected to the controller on this device (not shown in the figure). The temperature and humidity sensor can transmit the environmental data inside the combined housing 1 to the controller. The controller opens the solenoid valve 63 and the vacuum pump 61 in a timely manner to keep the temperature and humidity inside the combined housing 1 within a reasonable range, so as to avoid the seeds being affected by other factors during the drying process.

[0066] In one embodiment of this application, such as Figure 6 As shown, a heat-conducting part 151 is provided on the lower cover 15. A first heat-insulating part 152 and a second heat-insulating part 153 are provided above and below the heat-conducting part 151, respectively. A first connecting ring 14 and a second connecting ring 32 are connected to the first heat-insulating part 152, and another second connecting ring 32 is connected to the second heat-insulating part 153.

[0067] It should be noted that the first heat insulation part 152 and the second heat insulation part 153 described in this embodiment can be made of vacuum heat insulation board material, which can block the heat of the heat-conducting part 151 under the condition of meeting the hardness requirements, and prevent the heat from being transferred along the lower cover 15 body, so as to ensure the safety of the operation of this device.

[0068] In summary, the seed processing and drying device of this application embodiment uses an eccentric vibrating motor running at the bottom of the combined housing. The spherical heat-conducting medium and the seeds continuously move around, allowing them to mix and come into full contact, thus avoiding local overheating. The medium moves towards the bottom of the auger conveyor, where it can separate from the seeds, thereby ensuring the processing quality of the seeds.

[0069] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0070] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0071] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A seed processing and drying apparatus, characterized in that, include: The assembly comprises a housing, a feeding assembly, a heating mechanism, and an auger conveyor, wherein... An eccentric vibration motor is installed at the bottom of the combined housing, and multiple spherical heat-conducting media are provided inside the combined housing; The feeding assembly is connected to the combined housing, and one end of the feeding assembly extends into the interior of the combined housing; The heating mechanism is located on the outer side near the bottom of the combined housing; The auger conveyor is connected to the combined housing, and one end of the auger conveyor extends to the inner bottom wall near the combined housing; The auger conveyor has an opening on its outer wall near the bottom end; The outer wall of the auger conveyor is provided with a plurality of first through holes, and the spiral blades of the auger conveyor are provided with a plurality of second through holes. The diameters of the first through holes and the second through holes are equal and larger than the diameter of the spherical heat-conducting medium, but smaller than the short diameter of the seed. A blower is installed on the combined housing, the blower's outlet pipe is connected to the auger conveyor, and the plurality of second through holes extend to the blower's outlet pipe. The auger conveyor has a discharge pipe connected to its outer wall near the top.

2. The seed processing and drying apparatus according to claim 1, characterized in that, The combined housing includes an upper cover, a first connecting ring, and a lower cover, wherein, The upper cover and the lower cover are connected by the first connecting ring; The eccentric vibration motor and the heating mechanism are respectively mounted on the lower cover, and the plurality of spherical heat-conducting media are placed inside the lower cover; The auger conveyor, the blower, and the feeding assembly are respectively connected to the upper cover.

3. The seed processing and drying apparatus according to claim 2, characterized in that, It also includes a fabric assembly, which comprises a drive motor, a transmission component, a fabric plate, and multiple connecting rods, wherein... The drive motor is mounted on the upper cover; The transmission component and the fabric plate are rotatably connected to the auger conveyor, and the transmission component is connected to the output shaft of the drive motor; The transmission component is connected to the fabric plate via the plurality of connecting rods; The fabric plate is located above the plurality of spherical heat-conducting media, and there is a gap between the fabric plate and the lower cover. The lower edges of the fabric plate and the first through hole and the second through hole are on the same horizontal plane.

4. The seed processing and drying apparatus according to claim 3, characterized in that, The fabric plate is arranged in a bucket-shaped structure inside the lower cover.

5. The seed processing and drying apparatus according to claim 2, characterized in that, The heating mechanism includes an outer casing, a second connecting ring, and a heating component, wherein... The outer cover is fitted over the outside of the lower cover, and the outer cover and the lower cover are connected by two second connecting rings; The heating element is installed inside the outer casing.

6. The seed processing and drying apparatus according to claim 3, characterized in that, The feeding assembly includes a material collection trough, a material guide pipe, and an automatic closing component, wherein... One end of the guide tube extends into the interior of the combined housing, and the other end of the guide tube is arranged close to the auger conveyor and the fabric plate; The material collection trough is connected to the other end of the material guide pipe; The automatic closing component is installed at the connection between the material collection trough and the material guide pipe.

7. The seed processing and drying apparatus according to claim 6, characterized in that, An air extractor is installed on the combined housing. The air inlet of the air extractor is connected to a pipe. One end of the pipe is connected to the feed pipe. A solenoid valve is installed on the pipe.

8. The seed processing and drying apparatus according to claim 5, characterized in that, The lower cover is provided with a heat-conducting part, and a first heat-insulating part and a second heat-insulating part are provided above and below the heat-conducting part, respectively. The first connecting ring and a second connecting ring are connected to the first heat-insulating part, and the other second connecting ring is connected to the second heat-insulating part.

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