A circulating gas flow heated biological sample heating device

Abstract

The utility model discloses a kind of biological sample heating devices of circulating airflow heating, including device shell, rack, airflow driving element, heating structure and flow guide structure;Device shell includes coaxially arranged inner shell and outer shell, heating chamber is formed in the inside of inner shell, interlayer is formed between outer shell and inner shell;Rack is set in the inside of heating chamber, for carrying sample container;Airflow driving element is set in heating chamber, for driving airflow circulation flow between interlayer and heating chamber;Heating structure is set in interlayer, for heating airflow that flows through;Flow guide structure is set in the air outlet end of interlayer, and multiple guiding channels that are set around the axis of inner shell and extend in spiral radiation are formed;The device is through the construction of unique circulating airflow heating structure, realizes the rapid, uniform rewarming of biological sample while effectively isolating liquid contact.

Description

Technical Field

[0001] This utility model relates to the field of biological sample heating technology, specifically to a biological sample heating device using circulating airflow heating. Background Technology

[0002] In biomedical research and production practices, biological samples typically require long-term cryopreservation. Before use, these samples must undergo a safe and controlled rewarming process to restore their activity.

[0003] Currently, the most common thawing method used in laboratories is the constant-temperature water bath method. This method involves completely immersing the sealed cryovials in a constant-temperature water bath at a predetermined temperature, achieving rapid heating through heat conduction from the water. For example, Chinese Patent Publication No. CN218212286U provides a biological sample water bath oscillation resuscitation device, including a sample loading mechanism, a lifting drive mechanism, an oscillation drive mechanism, and a heating water tank mechanism. The sample loading mechanism is used to place and fix multiple cryovials. The sample loading mechanism can move in and out of the heating water tank mechanism and oscillate within the heating water tank mechanism under the control of the lifting drive mechanism and the oscillation drive mechanism, respectively, to improve the uniformity and efficiency of thawing.

[0004] However, the heating medium in water bath heating equipment is liquid. During the heating process, there is a risk that the water bath medium may seep in through the gaps in the cap of the cryopreservation tube, which can easily lead to sample contamination, causing subsequent experimental failures or cell culture to be scrapped, resulting in irreversible losses. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a biological sample heating device with circulating airflow heating, thereby solving the technical problem of sample contamination risk that may be caused by water bath heating in the prior art.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: This invention provides a biological sample heating device with circulating airflow heating, including a device shell, a placement rack, an airflow drive component, a heating structure, and a flow guiding structure. The device shell includes an inner shell and an outer shell arranged coaxially. A heating chamber is formed inside the inner shell, and a sandwich layer is formed between the outer shell and the inner shell. The placement rack is disposed inside the heating chamber and is used to carry the sample container. The airflow drive component is disposed in the heating chamber and is used to drive the airflow to circulate between the sandwich layer and the heating chamber. The heating structure is disposed in the sandwich layer and is used to heat the flowing airflow. The flow guiding structure is disposed at the air outlet end of the sandwich layer and forms a plurality of guide channels arranged around the axis of the inner shell and extending in a spiral radial shape, so as to guide the airflow from the air outlet end of the sandwich layer to the heating chamber through the guide channels.

[0007] In some embodiments, the circulating airflow heating biological sample heating device further includes a spiral guide structure, which includes a plurality of spiral guide vanes arranged spirally around the outer side of the inner shell and dividing the interlayer into a plurality of independent spiral guide channels.

[0008] In some embodiments, the spiral guide structure includes a flow guide shroud and flow guide blades. The flow guide shroud is arranged around one end of the inner shell, with its outer side communicating with the interlayer and its inner side communicating with the heating chamber. A plurality of flow guide blades are arranged in a circumferential array and spirally extended on the flow guide shroud, and a guide channel is formed between two adjacent flow guide blades.

[0009] In some embodiments, the flow guide is conical in shape, and the flow guide blades are disposed on the inner sidewall of the flow guide.

[0010] In some embodiments, the airflow drive includes a plurality of fans arranged circumferentially around the interior of the heating chamber.

[0011] In some embodiments, the circulating airflow heating biological sample heating device further includes an outer casing and a stirring mechanism. Both the stirring mechanism and the device casing are located inside the outer casing. The driving end of the stirring mechanism is connected to the placement rack and is used to drive the placement rack to move and stir the biological sample in the sample container.

[0012] In some embodiments, the agitation mechanism includes a rotation drive, a cam, and a connecting frame; one end of the connecting frame is connected to the placement frame, and the other end is eccentrically connected to the drive end of the rotation drive through the cam; the rotation drive is used to drive the cam to rotate, so as to cause the connecting frame and the placement frame to shake through the eccentric connection.

[0013] In some embodiments, the circulating airflow heating biological sample heating device further includes a cleaning structure, which includes a cleaning head, a water tank, and a water pump; the water tank is disposed inside the outer casing of the device; the water pump is disposed inside the water tank or connected to the water tank; the cleaning head is connected to the outlet of the water pump through a water supply pipeline, and the cleaning head is disposed on the outside of the outer casing of the device in a retractable manner.

[0014] In some embodiments, the circulating airflow heating biological sample heating device further includes a drainage structure, which includes a drain pipe and a drain valve. One end of the drain pipe is connected to the interior of the heating chamber, and the other end is disposed on the outside of the device casing and equipped with a drain valve.

[0015] In some embodiments, the circulating airflow heating biological sample heating device further includes a mounting platform and an inclined platform. The mounting platform is arranged in a ring structure on the inner wall of the inner shell. A discharge area is formed in the middle of the mounting platform, and a plurality of mounting slots for mounting airflow driving components are formed on the inner sidewall. The mounting slots are connected to the interlayer, and the discharge area is connected to one end of the drain pipe of the drainage structure. The inclined platform is arranged on the top of the mounting platform, and its top forms a conical inclined surface that slopes downward from the outside to the inside.

[0016] Compared with existing technologies, the circulating airflow heating biological sample heating device provided by this utility model, through the arrangement of a device shell, a placement rack, an airflow drive component, a heating structure, and a flow guiding structure, achieves significant improvements. The device shell utilizes a coaxially arranged inner and outer shell to form a sandwiched airflow channel. This, combined with the airflow drive component within the heating chamber, promotes continuous circulation of hot airflow between the sandwiched space and the heating chamber. The flow guiding structure forms multiple spirally extending radial guide channels at the air outlet of the sandwiched space, allowing the hot airflow to be evenly released around the sample container in a swirling manner, significantly improving heat exchange efficiency. The entire heating process takes place entirely in a sealed, dry airflow environment, fundamentally eliminating the risk of sample contamination due to liquid seepage. Simultaneously, the three-dimensional airflow circulation effectively avoids localized overheating or heating dead zones, providing a reliable guarantee for the safe resuscitation of biological samples. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main cross-sectional structure of the circulating airflow heating biological sample heating device provided in this embodiment of the present invention; Figure 2 This is a three-dimensional structural schematic diagram of the circulating airflow heating biological sample heating device provided in this embodiment of the utility model; Figure 3 This is a schematic diagram of the main cross-sectional structure of the housing of the circulating airflow heating biological sample heating device provided in this embodiment of the utility model; Figure 4 This is a front view cross-sectional structural diagram of the placement rack and stirring mechanism of the circulating airflow heating biological sample heating device provided in this embodiment of the utility model; Figure 5 This is a front cross-sectional view of the cleaning structure of the circulating airflow heating biological sample heating device provided in this embodiment of the present invention. Figure 6 This is a top cross-sectional view of the biological sample heating device with circulating airflow heating provided in this embodiment of the present invention; Figure 7 This is a three-dimensional structural diagram of the airflow guiding structure of the circulating airflow heating biological sample heating device provided in this embodiment of the present invention.

[0018] Explanation of reference numerals in the attached drawings: 1. Device housing; 11. Inner shell; 111. Mounting platform; 1111. Mounting groove; 1112. Discharge area; 112. Inclined platform; 113. Connecting hole; 12. Outer shell; 13. Heating chamber; 14. Interlayer; 2. Placement rack; 3. Airflow drive component; 31. Fan; 4. Heating structure; 5. Guide structure; 51. Guide hood; 52. Guide vane; 6. Spiral guide structure; 61. Spiral guide plate; 7. Outer casing of the device; 8. Agitation mechanism; 81. Rotation drive component; 82. Cam; 83. Connecting frame; 9. Cleaning structure; 91. Cleaning head; 92. Water tank; 93. Water pump; 94. Hose; 10. Drainage structure; 101. Drain pipe; 102. Drain valve. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] To address the technical problem of sample contamination risks that may arise from water bath heating, this invention provides a biological sample heating device with circulating airflow heating. By constructing a unique circulating airflow heating structure, it achieves rapid and uniform rewarming of biological samples while effectively isolating them from liquid contact.

[0021] Please see Figures 1 to 7 The circulating airflow heating biological sample heating device includes a device housing 1, a placement rack 2, an airflow drive 3, a heating structure 4, and a flow guiding structure 5. The device housing 1 includes an inner shell 11 and an outer shell 12 arranged coaxially. The inner shell 11 forms a cylindrical heating chamber 13, and an interlayer 14 is formed between the outer shell 12 and the inner shell 11. The placement rack 2 is disposed inside the heating chamber 13 and is used to hold the sample container. The airflow drive 3 is disposed in the heating chamber 13 and is used to drive the airflow to circulate between the interlayer 14 and the heating chamber 13. The heating structure 4 is disposed in the interlayer 14 and is used to heat the flowing airflow. The flow guiding structure 5 is disposed at the air outlet end of the interlayer 14 and forms multiple guide channels arranged around the axis of the inner shell 11 and extending in a spiral radial shape, so as to guide the airflow at the air outlet end of the interlayer 14 to the heating chamber 13 through the guide channels.

[0022] In this device, the housing 1 comprises an inner shell 11 and an outer shell 12 arranged coaxially, with a sandwich 14 formed between them. An airflow drive 3 is installed within the sandwich 14, enabling stable airflow circulation between the sandwich 14 and the heating chamber 13. This airflow drive 3, in conjunction with the airflow drive 3 within the heating chamber 13 of the inner shell 11, promotes continuous circulation of hot air between the sandwich 14 and the heating chamber 13, thereby achieving uniform heating of the sample container. A guide structure 5 forms multiple spirally extending radial guide channels at the air outlet of the sandwich 14, allowing the hot airflow to be released uniformly around the sample container in a swirling manner, significantly improving heat exchange efficiency.

[0023] The inner shell 11 and the outer shell 12 are connected and sealed at their top ends by an annular top plate and at their bottom ends by an annular bottom plate, making the interlayer 14 a sealed annular air duct. The inner shell 11 is made of a metal material with good thermal conductivity, such as aluminum alloy or stainless steel, to promote heat exchange.

[0024] Please see Figure 1 and Figure 4 The placement rack 2 is located at the center of the heating chamber 13. The placement rack 2 has a multi-layered frame structure and is stacked within the heating chamber 13. Each layer has multiple holes for securing standard cryopreservation tubes, ensuring the sample containers remain upright and stable during heating. The placement rack 2 is made of high-temperature resistant and low-thermal-conductivity engineering plastic to prevent burns to the sample containers.

[0025] Please see Figure 1 , Figure 3 and Figure 7 In some possible embodiments, the spiral guide structure 5 includes a flow guide shroud 51 surrounding the top of the inner shell 11, and multiple flow guide blades 52 fixed to the inner wall of the flow guide shroud 51 and extending in a spiral shape. The top of the inner shell 11 has an annular opening. The flow guide shroud 51 has an annular conical structure, with one outer side mounted on the top of the inner shell 11 and the inner side extending downwards towards the heating chamber 13. The flow guide blades 52 are located on the inner wall of the flow guide shroud 51, and the gaps between the flow guide blades 52 constitute the guide channel. The bottom of the inner shell 11 has a through hole connecting the interlayer 14 and the heating chamber 13. Driven by the airflow drive 3, the airflow enters the heating chamber 13 from the interlayer 14 through the flow guide structure 5, and then forms a spiral flow path under the action of the flow guide structure 5, allowing the hot airflow to be more evenly distributed within the heating chamber 13. The conical structure of the flow guide shroud 51 allows the hot airflow to form a downward swirling flow, further enhancing the uniformity of the hot airflow distribution within the heating chamber 13.

[0026] Please see Figure 1 and Figure 3To optimize the airflow path within the interlayer 14, in some embodiments, the circulating airflow heating device for biological samples further includes a spiral guide structure 6. The spiral guide structure 6 consists of multiple spiral guide vanes 61 attached to the outer wall of the inner shell 11. These spiral guide vanes 61 spirally surround the outer side of the inner shell 11, dividing the interlayer 14 into multiple independent spiral guide channels. The heating structure 4 is a heating wire, heating tube, or heating plate disposed within the spiral guide channels and fixed to the outer wall of the inner shell 11. It can uniformly heat the airflow flowing through the spiral guide channels. The spiral guide vanes 61 not only guide the airflow along a specific path but also effectively reduce turbulence within the interlayer 14, allowing the airflow to form a stable spiral flow pattern within the interlayer 14, ensuring uniform heat transfer to the heating chamber 13. Furthermore, the spiral guide vanes 61 increase the contact area and contact time between the airflow and the heating structure 4, further promoting heat conduction.

[0027] To enhance the practicality of the device, an insulation layer is also provided on the outer wall of the outer casing 12 to reduce heat loss, thereby improving the energy efficiency of the device and reducing its impact on the external environment. The insulation layer is made of high-efficiency insulation materials, such as aerogel or polyurethane foam.

[0028] To simultaneously agitate the biological sample within the sample container during heating, prevent cell precipitation, and improve thawing uniformity, please refer to [link to relevant documentation]. Figure 1 , Figure 2 , Figure 4 and Figure 5 In some possible embodiments, an outer casing 7 and a stirring mechanism 8 are also provided. The stirring mechanism 8 and the casing 1 are both located inside the outer casing 7. The driving end of the stirring mechanism 8 is connected to the placement rack 2 and is used to drive the placement rack 2 to move and stir the biological sample in the sample container. Specifically, the stirring mechanism 8 includes a rotation drive 81, a cam 82, and a connecting frame 83. The two ends of the connecting frame 83 are respectively located on both sides of the casing 1 and extend upward to connect with the top of the placement rack 2. The other end is located at the bottom of the casing 1 and forms an eccentric connection with the driving end of the rotation drive 81 through the cam 82. The rotation drive 81 is preferably a drive motor. When the drive motor rotates, it drives the cam 82 to make an eccentric movement, which in turn causes the placement rack 2 to make a swaying movement through the connecting frame 83.

[0029] In other possible embodiments, the agitation mechanism 8 can be a linear motor that directly drives the placement rack 2 to reciprocate up and down. Alternatively, it can be a magnetic drive, with a permanent magnet at the bottom of the placement rack 2 and an electromagnetic coil at the bottom of the outer casing 7, so that the placement rack 2 can be driven to move by changing the electromagnetic field.

[0030] Please see Figure 1 , Figure 2 and Figure 5 To facilitate cleaning and maintenance of the heating chamber 13, in some possible embodiments, the device also includes a cleaning structure 9, which includes a cleaning head 91, a water tank 92, and a water pump 93. The water tank 92 is located at the bottom of the outer casing 7 of the device and has a capacity of five liters. The water pump 93 is installed inside the water tank 92. The cleaning head 91 is connected to the outlet of the water pump 93 via a hose 94. A storage slot is provided on the side wall of the outer casing 7 of the device, and the cleaning head 91 is installed in the storage slot in a pull-out manner. When cleaning is required, the cleaning head 91 is pulled out from the storage slot, the water pump 93 is started, and the water pump 93 delivers the cleaning solution in the water tank 92 to the cleaning head 91 through the polyurethane hose 94. The cleaning head 91 sprays the cleaning solution to clean the heating chamber 13 and its internal rack 2.

[0031] In other possible embodiments, the cleaning head 91 can be designed to be fixed, and multiple spray holes can be pre-set on the inner wall of the heating chamber 13 to achieve automatic spray cleaning. The water pump 93 can also have a heating function to provide warm cleaning water and enhance the cleaning effect.

[0032] Please see Figure 1 and Figure 2 In some possible embodiments, in conjunction with the cleaning structure 9, the device is also equipped with a drainage structure 10 for smoothly discharging the wastewater after cleaning. The drainage structure 10 includes a drain pipe 101 and a drain valve 102. One end of the drain pipe 101 is installed on the bottom outer side of the outer casing 12, and a connecting hole 113 is provided at the bottom of the inner casing 11, so that the heating chamber 13 is connected to the drain pipe 101 through the connecting hole 113. The other end of the drain pipe 101 is located on the outside of the outer casing 7 of the device and is equipped with a drain valve 102, so that the wastewater after cleaning can be smoothly discharged from the device through the drain pipe 101.

[0033] Please see Figures 1 to 3 In some possible embodiments, the airflow drive component 3 includes multiple fans 31. A mounting platform 111 and an inclined platform 112 are also provided at the bottom of the inner wall of the inner shell 11. The mounting platform 111 is arranged in a ring structure on the inner wall of the inner shell 11, and a discharge area 1112 is formed in the middle of the mounting platform 111. The discharge area 1112 is connected to one end of the drain pipe 101 of the drainage structure 10, facilitating liquid collection and discharge. Multiple mounting grooves 1111 are formed on the inner sidewall of the mounting platform 111, and the mounting grooves 1111 are connected to the interlayer 14. The fans 31 are installed inside the mounting grooves 1111, so that multiple fans 31 are arranged circumferentially inside the heating chamber 13, and the airflow can smoothly flow back from the heating chamber 13 to the interlayer 14 under the drive of the fans 31. The inclined platform 112 is located above the mounting platform 111 and is inclined, which can guide the waste liquid after cleaning smoothly into the discharge area 1112 to reduce waste liquid residue and facilitate cleaning.

[0034] To better understand this utility model, the following is combined with... Figures 1 to 7 The technical solution of this utility model is described in detail below: After the device is started, the fan 31 begins to work, drawing the airflow from the bottom of the heating chamber 13 into the interlayer 14 through the mounting groove 1111. The airflow flows along the spiral guide channel within the interlayer 14 and is heated by the PTC heating element attached to the outer wall of the inner shell 11. The heated airflow rises to the top of the interlayer 14, and after passing through the spiral radial guide channel of the guide structure 5, forms a uniform rotating airflow that enters the heating chamber 13, heating the sample container on the placement rack 2 from all directions. The airflow flows downward within the heating chamber 13, finally flowing from the bottom of the interlayer 14 back to the interlayer 14, completing one cycle. Simultaneously, the stirring mechanism 8 drives the cam 82 to rotate via the drive component, causing the connecting rack 83 and the placement rack 2 to shake regularly, promoting uniform mixing of biological samples within the sample container. After use, the user can rinse the inside of the heating chamber 13 by pulling out the cleaning head 91, and the wastewater after rinsing is discharged through the drainage structure 10, ensuring the cleanliness and hygiene of the device's interior.

[0035] The circulating airflow heating biological sample heating device provided by this utility model comprises a device housing 1, a placement rack 2, an airflow drive component 3, a heating structure 4, and a flow guiding structure 5. The device housing 1 uses an inner shell 11 and an outer shell 12 arranged coaxially to form a sandwich 14 air duct. This, in conjunction with the airflow drive component 3 within the heating chamber 13, promotes continuous circulation of hot airflow between the sandwich 14 and the heating chamber 13. The flow guiding structure 5 forms multiple spirally extending radial guide channels at the air outlet of the sandwich 14, allowing the hot airflow to be evenly released around the sample container in a swirling manner, significantly improving heat exchange efficiency. The entire heating process is carried out in a completely sealed, dry airflow environment, fundamentally eliminating the risk of sample contamination due to liquid seepage. Simultaneously, the three-dimensional airflow circulation effectively avoids localized overheating or heating dead zones, providing a reliable guarantee for the safe resuscitation of biological samples.

[0036] In the description of this application, it should be noted that the terms "upper" and "lower," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0037] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A biological sample heating device using circulating airflow heating, characterized in that, include: The device housing includes an inner shell and an outer shell arranged coaxially, wherein a heating chamber is formed inside the inner shell, and a sandwich is formed between the outer shell and the inner shell; A placement rack, located inside the heating chamber, is used to hold sample containers; An airflow drive component is disposed in the heating chamber and is used to drive airflow to circulate between the interlayer and the heating chamber; A heating structure is disposed within the interlayer for heating the flowing airflow; as well as A flow guiding structure is provided at the air outlet end of the interlayer and forms multiple guide channels arranged around the axis of the inner shell and extending in a spiral radial shape, so as to guide the airflow at the air outlet end of the interlayer to the heating chamber through the guide channels.

2. The biological sample heating device with circulating airflow heating according to claim 1, characterized in that, It also includes a spiral guide structure, which includes multiple spiral guide vanes. The multiple spiral guide vanes are spirally arranged around the outer side of the inner shell and divide the interlayer into multiple independent spiral guide channels.

3. The circulating airflow heating biological sample heating device according to claim 2, characterized in that, The spiral guide structure includes a flow guide shroud and flow guide blades. The flow guide shroud is arranged around one end of the inner shell, with its outer side communicating with the interlayer and its inner side communicating with the heating chamber. A plurality of flow guide blades are arranged in a circumferential array and spirally extended on the flow guide shroud, and the guide channel is formed between two adjacent flow guide blades.

4. The biological sample heating device with circulating airflow heating according to claim 3, characterized in that, The flow guide is conical in shape, and the flow guide blades are located on the inner sidewall of the flow guide.

5. The biological sample heating device with circulating airflow heating according to claim 1, characterized in that, The airflow drive includes multiple fans, which are arranged circumferentially around the interior of the heating chamber.

6. The biological sample heating device with circulating airflow heating according to claim 1, characterized in that, It also includes an outer casing and a stirring mechanism. Both the stirring mechanism and the device casing are located inside the outer casing. The drive end of the stirring mechanism is connected to the placement rack and is used to drive the placement rack to move and stir the biological sample in the sample container.

7. The circulating airflow heating biological sample heating device according to claim 6, characterized in that, The agitation mechanism includes a rotation drive, a cam, and a connecting frame; one end of the connecting frame is connected to the placement frame, and the other end is eccentrically connected to the drive end of the rotation drive through the cam; the rotation drive is used to drive the cam to rotate, so as to drive the connecting frame and the placement frame to shake through the eccentric connection.

8. The biological sample heating device with circulating airflow heating according to claim 6, characterized in that, It also includes a cleaning structure, which includes a cleaning head, a water tank, and a water pump; the water tank is located inside the outer casing of the device; the water pump is located inside the water tank or connected to the water tank; the cleaning head is connected to the outlet of the water pump through a water supply pipeline, and the cleaning head is located on the outside of the outer casing of the device in a retractable manner.

9. The biological sample heating device with circulating airflow heating according to claim 8, characterized in that, It also includes a drainage structure, which includes a drain pipe and a drain valve. One end of the drain pipe is connected to the interior of the heating chamber, and the other end is located on the outside of the outer casing of the device and is equipped with a drain valve.

10. The biological sample heating device with circulating airflow heating according to claim 9, characterized in that, It also includes a mounting platform and an inclined platform. The mounting platform is arranged in a ring structure on the inner wall of the inner shell. A discharge area is formed in the middle of the mounting platform. Multiple mounting slots for installing airflow driving components are formed on the inner side wall. The mounting slots are connected to the interlayer. The discharge area is connected to one end of the drain pipe of the drainage structure. The inclined platform is arranged on the top of the mounting platform. Its top forms a conical inclined surface that slopes downward from the outside to the inside.

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