Vaginal secretion sample detection device
By combining the test tube placement structure and the rotation drive mechanism, the problem of unstable reagent temperature is solved, achieving dynamic temperature uniformity of reagents and isolation of contaminants, thus improving the accuracy and safety of detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- FOURTH MILITARY MEDICAL UNIVERSITY
- Filing Date
- 2026-01-20
- Publication Date
- 2026-04-17
AI Technical Summary
In existing automated vaginal secretion testing devices, the reagent storage temperature is unstable, which leads to the degradation of the activity of active biological reagents such as enzymes, antibodies, and nucleic acids, affecting the accuracy and sensitivity of the test results.
The test tube placement structure, combined with a low-temperature cooling plate and a rotary drive mechanism, enables dynamic temperature uniformity of the reagents and forms an annular gas curtain in the gas channel, maintaining the reagents at the optimal storage temperature and isolating them from external temperature fluctuations and contaminants.
This ensures the maintenance of reagent activity, reduces the risk of drift and false negatives in test results, and improves the precision and aseptic safety of the test.
Smart Images
Figure CN121878239A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of medical device technology, and in particular relates to a device for detecting vaginal secretion samples. Background Technology
[0002] Vaginal secretion testing is a crucial part of routine gynecological examinations, used to diagnose common diseases such as vaginitis and cervicitis. The accuracy of the test results directly affects clinical treatment decisions. Currently, automated testing equipment has gradually replaced manual operations, becoming an important means to improve testing efficiency and standardization. Such equipment typically integrates functional modules such as sample pretreatment, reagent dispensing, incubation reaction, and optical detection, achieving automated operation through robotic arms and motion platforms. However, existing automated vaginal secretion testing devices still have several inherent defects in their mechanical structure and system design, which limit their testing accuracy, operational efficiency, and clinical applicability. These defects are as follows; There are bottlenecks in reagent storage and temperature management. The equipment adopts an open or simply covered reagent tray design, and the reagent tubes are directly exposed to the laboratory environment. Fluctuations in ambient temperature, instrument heating, and air convection can all lead to unstable reagent temperatures. This is especially true for commonly used active biological reagents such as enzymes, antibodies, and nucleic acids, whose activity is extremely sensitive to temperature. Deviations in storage temperature can easily lead to a decrease in reagent efficacy, which in turn can cause problems such as drift in test results, decreased sensitivity, or even false negatives. Summary of the Invention
[0003] This invention addresses the problem that existing equipment uses open or simply covered reagent tray designs, where reagent tubes are directly exposed to the laboratory environment. Fluctuations in ambient temperature, instrument heating, and air convection can all lead to unstable reagent temperatures. This is especially problematic for commonly used active biological reagents such as enzymes, antibodies, and nucleic acids, whose activity is extremely sensitive to temperature. Deviations in storage temperature can easily lead to reagent efficacy degradation, resulting in drifting of test results, decreased sensitivity, and even false negatives. The invention proposes the following technical solution: A vaginal secretion sample detection device includes: a support frame, a detection box installed above the support frame, a propulsion assembly installed inside the support frame, a lateral displacement assembly installed inside the support frame and located at the end of the propulsion assembly, and an imaging assembly installed inside the support frame and located above the lateral displacement assembly. The vaginal secretion sample testing device also includes a test tube placement structure, which is located inside the support frame and is used to transport the sample while keeping it warm.
[0004] As a preferred embodiment of the above technical solution, the test tube placement structure includes a placement rack disposed inside the support frame, a power supply compartment disposed inside the placement rack, an energy storage device disposed inside the power supply compartment, and low-temperature cooling plates symmetrically disposed inside the placement rack.
[0005] As a preferred embodiment of the above technical solution, the cryogenic cold plate and the energy storage device are electrically connected, the number of cryogenic cold plates is set to several groups, with two adjacent cryogenic cold plates forming a group, and a test tube is arranged above the support frame between two cryogenic cold plates.
[0006] As a preferred embodiment of the above technical solution, a baffle is installed inside the placement rack at one end of the energy storage component, and a sealing ring is provided at the connection between the baffle and the placement rack.
[0007] As a preferred embodiment of the above technical solution, the placement frame is rotatably connected to multiple rotating disks, the bottom end of each rotating disk is connected to a speed-changing structure, the bottom end of the speed-changing structure is connected to a linkage structure, the bottom end of the linkage structure is provided with a fan blade, and a driving component is fixedly installed inside the placement frame, wherein one of the fan blades is connected to the output shaft of the driving component.
[0008] As a preferred embodiment of the above technical solution, the linkage structure is composed of an inner toothed belt and an outer toothed pulley, and a support bar is connected between the outer sides of the multiple speed-changing structures, and the support bar is fixedly installed inside the placement frame.
[0009] As a preferred embodiment of the above technical solution, a pressure sensor is snapped into the center of the top of the rotating disk, and a disc is snapped into the top of the pressure sensor, with the disc slidably connected inside the rotating disk.
[0010] As a preferred embodiment of the above technical solution, an exhaust groove is provided at the bottom of the inner wall of the rotating disk, an exhaust hole is provided at the top of the exhaust groove inside the rotating disk, and a heat exchange groove is provided at the top of the placement rack.
[0011] As a preferred embodiment of the above technical solution, the number of heat exchange tanks is set to several, the shape of the heat exchange tanks is arc-shaped, and the center points of two adjacent heat exchange tanks are the same and symmetrically arranged.
[0012] The beneficial effects of this invention are as follows: (1) Through the test tube placement structure, the ambient temperature around the test tube can be precisely controlled at the optimal storage temperature required by the reagent (e.g., 4-10°C). This effectively solves the problem of activity decay caused by reagent exposure to room temperature in traditional open designs. Through stable low-temperature storage, the activity of biological reagents such as enzymes, antibodies, and nucleic acids relied upon in the detection can be maintained for a long time, ensuring the stability and sensitivity of the reaction system. This reduces the risk of test result drift, false negatives, or inaccurate quantification caused by reagent failure from the source, and greatly improves the reliability and consistency of clinical test results. (2) The test tube placement structure not only has a cooling function, but also innovatively integrates a rotation drive mechanism, which can drive the tray or frame carrying the test tubes to rotate slowly and intermittently. This "dynamic temperature uniformity" design allows all test tubes to periodically pass through different areas of the temperature field, breaking the static temperature gradient (such as the temperature difference between the center and the edge) caused by the fixed position of the cold source. As a result, the internal reagents of each test tube on the tray can be in a highly consistent temperature environment, avoiding different reaction rates caused by local temperature differences, further ensuring the parallelism and comparability of the test results of multiple samples in the same batch, and improving the precision of the test. (3) The annular gas channel set around the test tube placement area can continuously blow clean, low-temperature laminar gas upwards, forming an invisible "air curtain" above the reagent open area. This air curtain has dual benefits: firstly, it can isolate the disturbance of external hot air, which helps to stabilize the low-temperature microenvironment of the reagent area and reduce the loss of cold energy. Secondly, and more importantly, it can effectively prevent dust, aerosols and other contaminants from the external environment from falling into the open test tubes, while also inhibiting the outward diffusion of aerosols that may be generated in the reagent area. Thus, without the need for physical covering, it achieves dynamic physical protection of reagents, greatly reducing the risk of cross-contamination between samples and reagent contamination, and improving the aseptic safety assurance level of the detection process. Attached Figure Description
[0013] Figure 1 The diagram shown is a structural schematic of a vaginal secretion sample detection device according to Example 1; Figure 2 The diagram shown is a cross-sectional view of the test tube placement structure in Example 1; Figure 3 This is a schematic diagram of the test tube placement structure from another perspective in Example 1; Figure 4 The diagram shown is a schematic diagram of the transmission structure in Embodiment 1; Figure 5 The diagram shown is a cross-sectional view of the rotating disk in Embodiment 1.
[0014] In the diagram: 1. Support frame; 2. Detection box; 3. Propulsion assembly; 4. Lateral displacement assembly; 5. Imaging assembly; 6. Test tube placement structure; 61. Placement rack; 62. Power supply compartment; 63. Energy storage component; 64. Low-temperature cooling plate; 65. Baffle; 66. Rotary disk; 67. Speed change structure; 68. Linkage structure; 69. Fan blade; 610. Drive component; 611. Support bar; 612. Pressure sensor; 613. Disc; 614. Exhaust trough; 615. Exhaust port; 616. Heat exchange tank. Detailed Implementation
[0015] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.
[0016] Example 1 This invention provides a device for detecting vaginal secretion samples, such as... Figures 1 to 5 As shown, a vaginal secretion sample detection device includes: a support frame 1, a detection box 2 installed above the support frame 1, a propulsion assembly 3 installed inside the support frame 1, a lateral displacement assembly 4 installed inside the support frame 1 and located at the end of the propulsion assembly 3, and an imaging assembly 5 installed inside the support frame 1 and located above the lateral displacement assembly 4. The vaginal secretion sample testing device also includes a test tube placement structure 6, which is located inside the support frame 1 and is used to transport the sample while keeping it warm.
[0017] The equipment adopts an open or simply covered reagent tray design, with the reagent tubes directly exposed to the laboratory environment. Fluctuations in ambient temperature, instrument heating, and air convection can all lead to unstable reagent temperatures. This is especially true for commonly used active biological reagents such as enzymes, antibodies, and nucleic acids, whose activity is extremely sensitive to temperature. Deviations in storage temperature can easily lead to a decrease in reagent efficacy, which in turn can cause problems such as drift in test results, decreased sensitivity, or even false negatives. In this application, the test tube placement structure 6 can precisely control the ambient temperature around the test tube to the optimal storage temperature required by the reagent (e.g., 4-10°C). This effectively solves the problem of activity decay caused by reagent exposure to room temperature in traditional open designs. Through stable low-temperature storage, the activity of biological reagents such as enzymes, antibodies, and nucleic acids relied upon in the detection can be maintained for a long time, ensuring the stability and sensitivity of the reaction system. This reduces the risk of test result drift, false negatives, or inaccurate quantification caused by reagent failure from the source, and greatly improves the reliability and consistency of clinical test results. The test tube placement structure 6 not only has a cooling function, but also innovatively integrates a rotary drive mechanism, which can drive the tray or frame carrying the test tubes to rotate slowly and intermittently. This "dynamic temperature uniformity" design allows all test tubes to periodically pass through different areas of the temperature field, breaking the static temperature gradient (such as the temperature difference between the center and the edge) caused by the fixed position of the cold source. As a result, the reagents inside each test tube on the tray can be in a highly consistent temperature environment, avoiding different reaction rates caused by local temperature differences. This further ensures the parallelism and comparability of the test results of multiple samples in the same batch, and improves the precision of the test. The annular gas channel surrounding the test tube placement area continuously blows clean, low-temperature laminar gas upwards, forming an invisible "air curtain" above the open reagent area. This air curtain has dual benefits: firstly, it isolates the disturbance of external hot air, helping to stabilize the low-temperature microenvironment of the reagent area and reduce cold loss; secondly, and more importantly, it effectively prevents dust, aerosols, and other contaminants from the external environment from falling into the open test tubes, while also inhibiting the outward diffusion of aerosols that may be generated in the reagent area. Thus, dynamic physical protection of reagents is achieved without the need for physical covering, greatly reducing the risk of cross-contamination between samples and reagent contamination, and improving the aseptic safety assurance level of the detection process. In use, the test tube is placed inside the test tube placement structure 6. Then, the propulsion component 3 is activated, which guides the test tube placement structure 6 into the lateral displacement component 4. At this time, the lateral displacement component 4 pushes the test tube to move and then enters the imaging component 5 for imaging. At the same time, the sample inside the test tube is detected inside the detection box 2.
[0018] Specifically, a detection box 2 is installed at the top of the support frame 1 (the detection box 2 is equipped with a pipetting device, a drying camera device, a slide delivery device, and a microscopic device, etc., all of which are existing technologies and will not be elaborated on here). A propulsion component 3 is installed inside the detection box 2. A lateral displacement component 4 is installed inside the support frame 1 and at the end of the propulsion component 3. An imaging component 5 is installed inside the support frame 1 and above the lateral displacement component 4. A test tube placement structure 6 is provided inside the support frame 1 and above the propulsion component 3.
[0019] To achieve the cooling of the test tubes as described in the above embodiments, the following solution is provided: Figure 2 and Figure 3 As shown, the placement structure 6 includes a placement frame 61 disposed inside the support frame 1, a power supply compartment 62 disposed inside the placement frame 61, an energy storage component 63 disposed inside the power supply compartment 62, and low-temperature cooling plates 64 symmetrically disposed inside the placement frame 61.
[0020] In use, the energy storage unit 63 inside the power compartment 62 supplies power to the low-temperature cooling plate 64, causing the low-temperature cooling plate 64 to operate. When the low-temperature cooling plate 64 operates, one end generates a low temperature and the other end generates a high temperature. The low-temperature end is in contact with the outside of the test tube, thereby cooling the test tube and reducing the test tube temperature, thus keeping the test tube temperature at (e.g., 4-10°C).
[0021] Specifically, the support frame 1 has a placement rack 61 inside, and a power compartment 62 is fixedly installed inside the placement rack 61. An energy storage component 63 (which is a 12V or 24V battery) is snapped into the power compartment 62. A placement slot is snapped into the placement rack 61. A low-temperature cold plate 64 is installed inside the placement rack 61 at the inner wall of the placement slot. The low-temperature cold plate 64 and the energy storage component 63 are electrically connected. The number of low-temperature cold plates 64 is set to several groups, with two adjacent low-temperature cold plates 64 forming a group. The opposite surfaces of two low-temperature cold plates 64 are both cold ends. A test tube is placed above the support frame 1 between two low-temperature cold plates 64. A baffle 65 is installed inside the placement rack 61 at one end of the energy storage component 63. A sealing ring is provided at the connection between the baffle 65 and the placement rack 61 to isolate the energy storage component 63.
[0022] To achieve circumferential cooling of the test tube's outer surface and prevent temperature differences as described in the above embodiments, the following solution is provided: Figures 2 to 4 As shown, multiple rotating disks 66 are rotatably connected inside the placement frame 61. A speed change structure 67 is connected to the bottom of the rotating disk 66. A linkage structure 68 is connected to the bottom of the speed change structure 67. A fan blade 69 is provided at the bottom of the linkage structure 68. A drive component 610 is fixedly installed inside the placement frame 61. One of the fan blades 69 is connected to the output shaft of the drive component 610.
[0023] In use, the drive unit 610 is connected to the electrical energy of the energy storage unit 63 and starts running. When the drive unit 610 runs, it drives one of the fan blades 69 to rotate. When one of the fan blades 69 rotates, it drives the linkage structure 68 to run. When the linkage structure 68 runs, it drives multiple fan blades 69 to rotate synchronously. At the same time, it drives the rotating disk 66 to rotate slowly through the speed change structure 67. When the rotating disk 66 rotates slowly, it drives the test tube to rotate slowly, so as to achieve dynamic temperature uniformity.
[0024] Specifically, multiple rotating disks 66 are rotatably connected inside the placement frame 61. The bottom of the rotating disks 66 is connected to a transmission structure 67 (specifically a gearbox) via a key. The bottom of the transmission structure 67 is connected to a linkage structure 68 via a key. The linkage structure 68 is composed of an inner toothed belt and an outer toothed pulley. A fan blade 69 is fixedly installed at the bottom of the outer toothed pulley of the linkage structure 68. A drive unit 610 is fixedly installed inside the placement frame 61. One of the fan blades 69 is connected to the output shaft of the drive unit 610 via a key. The outer sides of the multiple transmission structures 67 are connected by the same support bar 611. The support bar 611 is fixedly installed inside the placement frame 61 by screws. The energy storage unit 63 and the drive unit 610 are electrically connected.
[0025] Furthermore, in order to detect whether the liquid level inside multiple test tubes is within the expected range, the following solution is provided: a pressure sensor 612 is embedded in the middle of the top of the rotating disk 66, and a disk 613 that can slide up and down is supported on the top of the pressure sensor 612. The disk 613 is slidably connected to the cavity inside the rotating disk 66.
[0026] In use, when the test tube is placed in the rotating disk 66, the weight of the test tube and its contents presses down on the disk 613, which transmits the pressure to the pressure sensor 612. After detecting the pressure data, the pressure sensor 612 transmits it to the terminal control system. By comparing the pressure values at each station, it is possible to indirectly determine or monitor whether the liquid level inside each test tube is consistent.
[0027] To achieve the goal of blocking the gas outside the test tube in the above embodiments, the following solution is provided: Figures 2 to 5 As shown, an exhaust groove 614 is provided at the bottom of the inner wall of the rotating disk 66, and an exhaust hole 615 is provided at the top of the exhaust groove 614 inside the rotating disk 66. A heat exchange groove 616 is provided at the top of the placement rack 61. The number of heat exchange grooves 616 is set to several. The shape of the heat exchange groove 616 is arc-shaped, and the center points of two adjacent heat exchange grooves 616 are the same and symmetrically arranged.
[0028] When in use, the airflow generated by the rotation of the fan blade 69 is divided into two parts. One part of the airflow enters the exhaust groove 614 and is blown upward through the exhaust hole 615, forming an airflow barrier around the lower part of the test tube. The other part of the airflow flows through the hot end of the low-temperature cold plate 64 for heat exchange. After absorbing heat, the temperature rises, and then the airflow is blown upward along the arc-shaped heat exchange groove 616, forming an upward airflow in the top area of the test tube. The two parts of the airflow work together to form a continuous, low-temperature annular air curtain around the test tube, which plays a role in stabilizing the local temperature, isolating pollutants, and reducing the loss of cold energy.
[0029] Specifically, an annular exhaust groove 614 is provided at the bottom of the inner wall of the rotating disk 66, and multiple vertical exhaust holes 615 are provided inside the rotating disk 66 above the exhaust groove 614. Multiple arc-shaped heat exchange grooves 616 are provided at the top of the placement rack 61. The number of heat exchange grooves 616 is set to several and they are distributed in a concentric ring.
[0030] Working principle: In actual use, the device is connected to an external power source to provide power to the whole machine. The control system sends initialization pulse signals to each drive component in sequence, which drives the drive motor of the propulsion component 3, drives the lead screw or gear, and moves the push plate to the preset "rear limit" and triggers the limit switch to complete the zeroing. Similarly, the drive motor of the lateral displacement component 4 performs the zeroing action, moves its platform to the "loading position" and triggers the corresponding sensor (the above belongs to the prior art and will not be elaborated on here). Current flows from the energy storage device 63 through the low-temperature cooling plate 64. Its cold end face (fitting against the inner wall of the placement slot) begins to actively absorb heat, and the temperature drops rapidly. The temperature of the hot end face rises synchronously. The drive device 610 is energized, and its output shaft begins to rotate at a constant speed. The rotation of the motor output shaft is directly transmitted to the fan blade 69 directly connected to it and the input shaft of the speed change structure 67 below through a key connection. The speed change structure 67 (with a gear set inside) converts the high-speed input into a low-speed, high-torque output, thereby driving the rotating disk 66, which is rigidly connected to the top of the speed change structure 67, to start rotating slowly. The fan blade 69 shaft, which is directly connected to the motor, transmits the rotational motion to the fan blade 69 shafts of other workstations through the linkage structure 68 (such as a synchronous toothed belt and pulley system). All driven shafts then drive all the corresponding rotating disks 66 to rotate slowly in the same direction, at the same speed, through their respective connected speed change structures 67. All the synchronously rotating fan blades 69 act as centrifugal fans, drawing in ambient air from below; A portion of the airflow is introduced into the cavity of the annular exhaust groove 614, and constrained by the structure, it is uniformly ejected upward from each vertical exhaust hole 615, forming a columnar rising airflow around the lower part of each test tube. Another part of the airflow is blown toward the hot end of the low-temperature cold plate 64 for forced convection heat transfer. After being heated, the airflow rises. The heated rising airflow encounters the guide wall of the arc-shaped heat exchange groove 616 and is combed and merged into a laminar flow curtain that moves along the path of the annular groove. It is blown upward from the outer side of the upper part of the test tube. This air curtain merges with the rising cold airflow below to form a complete dynamic gas barrier that surrounds the test tube. All rotating disks 66 rotate continuously at a uniform speed, the annular air curtain is stably formed, and the low-temperature cooling plate 64 continues to work until the temperature of the placement tank area reaches the set value. The mechanical system enters the "waiting to load" steady state, and the operator places the test tube vertically downward into the center hole of the rotating disk 66. The bottom of the test tube contacts the disk 613 and presses it down. The disk 613 is axially displaced along the inner cavity of the rotating disk 66 and directly presses against the sensing surface of the pressure sensor 612. The weight of the test tube and the solution inside is converted into pressure on the sensing surface of the pressure sensor 612 through the disk 613. The strain gauge inside the sensor deforms, generating a change in electrical signal. This process is a pure mechanical to electrical signal conversion without the intervention of other moving parts. The liquid level inside the test tube is checked by the electrical signal to see if it is within the predetermined range. The control system commands the motor of propulsion component 3 to work. The motor drives the ball screw to rotate through the coupling, which pushes the push plate on the screw nut forward (towards the lateral displacement component 4) in a straight line. The push plate contacts the placement rack 61 or the target test tube clamp, and smoothly pushes it away from the heat preservation area. It then precisely enters the slot or platform of the lateral displacement component 4 in the "loading station". The drive motor of the lateral displacement component 4 starts and drives the platform and test tube along the horizontal guide rail through a precision linear module (such as a belt linear module or another set of screw modules), moving step by step from one station to the next station. The movement path is as follows: loading station, shooting station directly below the shooting component 5, other detection stations, and unloading / return station (the above are existing technologies and will not be elaborated on here). Finally, after the test is completed, the staff can remove the test tubes from inside rack 61.
[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.
Claims
1. A vaginal discharge sample testing device, characterized by, include: Support frame (1), detection box (2) installed above support frame (1), propulsion assembly (3) installed inside support frame (1), lateral displacement assembly (4) installed inside support frame (1) and located at the end of propulsion assembly (3), and shooting assembly (5) installed inside support frame (1) and located above lateral displacement assembly (4). The vaginal secretion sample detection device also includes a test tube placement structure (6), which is located inside the support frame (1) and is used to transport the sample while keeping it warm.
2. The vaginal secretion sample detection device according to claim 1, characterized in that, The test tube placement structure (6) includes a placement rack (61) disposed inside the support frame (1), a power compartment (62) disposed inside the placement rack (61), an energy storage device (63) disposed inside the power compartment (62), and low-temperature cooling plates (64) symmetrically disposed inside the placement rack (61).
3. The vaginal secretion sample detection device according to claim 2, characterized in that, The low-temperature cold plate (64) and the energy storage device (63) are electrically connected. The number of the low-temperature cold plates (64) is set to several groups, with two adjacent low-temperature cold plates (64) forming a group. A test tube is placed above the support frame (1) between two low-temperature cold plates (64).
4. The device of claim 2, wherein the device is a vaginal discharge sample testing device. A baffle (65) is installed inside the placement rack (61) at one end of the energy storage component (63), and a sealing ring is provided at the connection between the baffle (65) and the placement rack (61).
5. The device of claim 1, wherein the device is a vaginal discharge sample testing device. The placement frame (61) has multiple rotating disks (66) rotatably connected inside. The bottom end of the rotating disk (66) is connected to a speed change structure (67). The bottom end of the speed change structure (67) is connected to a linkage structure (68). The bottom end of the linkage structure (68) is provided with a fan blade (69). A drive unit (610) is fixedly installed inside the placement frame (61). One of the fan blades (69) is connected to the output shaft of the drive unit (610).
6. The vaginal secretion sample detection device according to claim 5, characterized in that, The linkage structure (68) is composed of an inner toothed belt and an outer toothed pulley. Support bars (611) are connected between the outer sides of the multiple speed-changing structures (67). The support bars (611) are fixedly installed inside the placement frame (61).
7. The device of claim 5, wherein the device is a vaginal discharge sample testing device. A pressure sensor (612) is snapped into the middle of the top of the rotating disk (66), and a disc (613) is snapped into the top of the pressure sensor (612). The disc (613) is slidably connected inside the rotating disk (66).
8. The device of claim 7, wherein the device is a vaginal discharge sample testing device. The rotating disk (66) has an exhaust groove (614) at the bottom of its inner wall, and an exhaust hole (615) is provided inside the rotating disk (66) at the top of the exhaust groove (614). The placement rack (61) has a heat exchange groove (616) at its top.
9. The device of claim 8, wherein the device is a vaginal discharge sample testing device. The number of heat exchange tanks (616) is set to several, and the shape of the heat exchange tanks (616) is arc-shaped. The center points of two adjacent heat exchange tanks (616) are the same and symmetrically arranged.