Headspace sample injector temperature measuring device

Abstract

The utility model discloses a headspace sample injector temperature measuring device, which comprises a headspace sample injector body, a wireless transceiver module and a control module, the top of the headspace sample injector body is provided with a detection table for placing a reagent tube and a detection tube for sampling detection, and the detection table is internally provided with a wireless temperature measuring probe and a preheating assembly. The wireless temperature measurement probe is connected with the control module through the wireless transceiver module; the detection tube is provided with a sampling end, and the sampling end is provided with a sampling needle head and a temperature compensation assembly for performing secondary heating on a single reagent tube; the preheating assembly and the temperature compensation assembly are electrically connected with the control module; according to the headspace sample injector temperature measuring device, through staged heating of the preheating assembly and the temperature compensation assembly, accurate temperature control of a single reagent tube is achieved, and temperature deviation caused by synchronous heating is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of reagent testing equipment, specifically to a headspace sampler temperature measurement device. Background Technology

[0002] Headspace samplers are commonly used sample processing devices widely applied in environmental science, chemical analysis, food safety, and other fields. Temperature is a crucial parameter when using headspace samplers, as it affects the volatility and stability of the sample, thus significantly impacting the analytical results. The significance of studying headspace sampler temperature parameters includes: optimizing the sample processing procedure, improving the accuracy and sensitivity of sample analysis, ensuring the reproducibility of analytical data, and determining the content of volatile substances in the sample.

[0003] In current headspace samplers, multiple reagent tubes are typically inserted into a preheating pan during use. The heating temperature of the reagent tubes is controlled by a heater and temperature sensor inside the preheating pan. However, since the reagents stored in the multiple reagent tubes are different, their evaporation temperatures are also different. When heating multiple reagent tubes simultaneously, it is easy for the reagent in one set of reagent tubes to reach its evaporation temperature while the temperature inside another set of reagent tubes has not yet reached it. When a second heating is performed, the temperature inside the first set of reagent tubes may exceed the limit. Utility Model Content

[0004] The purpose of this invention is to provide a headspace sampler temperature measurement device to solve the problem that existing headspace samplers can only heat multiple reagent tubes simultaneously and cannot individually compensate for the temperature of reagent tubes that are not hot enough.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A headspace sampler temperature measurement device includes a headspace sampler body, a wireless transceiver module, and a control module. The headspace sampler body has a detection platform for placing reagent tubes and a detection tube for sampling and detection at its top. The detection platform is equipped with a wireless temperature probe and a preheating component. The wireless temperature probe is connected to the control module via the wireless transceiver module. The detection tube has a sampling end, which is equipped with a sampling needle and a temperature compensation component for secondary heating of a single reagent tube. The preheating component and the temperature compensation component are both electrically connected to the control module.

[0007] Furthermore, the preheating component includes a support plate, which is disposed inside the testing stage and has reagent tube holes evenly distributed along its circumference for fixing reagent tubes. A heat-conducting ring is provided inside the reagent tube hole, and the inner wall of the heat-conducting ring can fit against the outer wall of the reagent tube. A heater is provided inside the testing stage.

[0008] Furthermore, the temperature compensation component includes a sealing shell disposed on the outside of the sampling needle, and an annular heater disposed on the inner wall of the sealing shell. The inner wall of the annular heater can fit against the outer wall of the reagent tube and electrically heat the reagent tube.

[0009] Furthermore, the wireless temperature probe is a platinum resistance temperature detector.

[0010] Furthermore, the testing station has a base inside, and the top of the base has a support groove that can fit against the bottom of the reagent tube. The bottom of the wireless temperature probe is fixedly connected to the inner wall of the support groove.

[0011] Furthermore, the control module is located on the front side of the headspace sampler body, and the wireless transceiver module is located on one side of the control module.

[0012] Furthermore, the heat-conducting ring is made of a heat-conducting metal and its top can contact the annular heater.

[0013] Furthermore, a rubber stopper is provided at the top of the reagent tube.

[0014] Furthermore, the heaters are in six groups and are evenly fixed inside the testing platform.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] The headspace sampler temperature measurement device provided by this utility model, through the setting of a preheating component, can preheat the reagent tube after it is placed inside the heat-conducting ring using a heater to help the reagent inside the tube evaporate. When the sampling needle is inserted into the reagent tube for sampling, the temperature inside the reagent tube is individually detected by a wireless temperature probe. When the temperature inside the reagent tube is lower than the evaporation temperature, the reagent tube can be individually heated using a ring heater. Through the staged heating of the preheating component and the temperature compensation component, precise temperature control of a single reagent tube can be achieved, avoiding temperature deviations caused by synchronous heating. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0018] Figure 1 This is a three-dimensional view of a headspace sampler temperature measurement device.

[0019] Figure 2 This is a cross-sectional view of the detection stage in a headspace sampler temperature measurement device.

[0020] Figure 3This is a cross-sectional view of the base in a headspace sampler temperature measurement device.

[0021] Figure 4 This is a cross-sectional view of a sealing shell in a headspace sampler temperature measurement device.

[0022] In the diagram: 1-Headspace sampler body; 2-Detection stage; 3-Wireless temperature probe; 4-Detection tube; 5-Sampling needle; 6-Annular heater; 7-Support plate; 8-Heat-conducting ring; 9-Reagent tube; 10-Heater; 11-Sealing shell; 12-Base; 13-Support groove; 14-Control module; 15-Wireless transceiver module; 16-Rubber stopper. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to specific implementation methods and embodiments. It should be understood that the following embodiments are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention. Some non-substantial improvements and adjustments made by those skilled in the art based on the content of the present invention still fall within the scope of protection of the present invention.

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Example 1

[0031] See Figures 1-4This embodiment is a headspace sampler temperature measurement device, including a headspace sampler body 1, a wireless transceiver module 15, and a control module 14. The headspace sampler body 1 has a detection platform 2 for placing reagent tubes 9 and a detection tube 4 for sampling and detection at its top. The detection platform 2 contains a wireless temperature probe 3 and a preheating assembly. The wireless temperature probe 3 is connected to the control module 14 via the wireless transceiver module 15. The preheating assembly includes a support plate 7, which is disposed inside the detection platform 2 and has multiple test tubes circumferentially distributed on it for fixing the reagent tubes 9. The reagent tube 9 has a vial, and a heat-conducting ring 8 is provided inside the vial. When the reagent tube 9 is placed inside the vial, the inner wall of the heat-conducting ring 8 is in contact with the outer wall of the reagent tube 9. The bottom of the reagent tube 9 is in contact with the wireless temperature probe 3. In this embodiment, the wireless temperature probe 3 is a platinum resistance temperature detector. The wireless temperature probe 3 converts the temperature of the reagent tube 9 into an electrical signal, which is then converted into a digital signal by an analog-to-digital converter (ADC). The sensor data is processed, packaged into a standard format (such as JSON / XML), and sent to the control module 14 through the wireless transceiver module 15. Real-time, accurate, and remote monitoring of the temperature of reagent tube 9 is achieved. The detection platform 2 is equipped with a heater 10, which, under the control of the control module 14, heats the interior of the detection platform 2, thereby increasing the temperature of the reagent tube 9 and aiding in the evaporation of gas within the tube. The detection tube 4 has a sampling end equipped with a sampling needle 5 and a temperature compensation component for secondary heating of a single reagent tube 9. Both the preheating component and the temperature compensation component are electrically connected to the control module 14. The temperature compensation component includes a sealing shell 11 located outside the sampling needle 5. The inner wall of the sealed shell 11 is provided with a ring heater 6. When the sampling needle 5 is inserted into the reagent tube 9 for sampling, the ring heater 6 is in contact with the heat-conducting ring 8 to conduct the temperature to the reagent tube 9. The wireless temperature measuring probe 3, the wireless transceiver module 15 and the control module 14 and the analysis software form a detection system. It can automatically calculate the instrument's core indicators such as the average temperature, indication error and temperature uniformity, and generate a calibration report. The controller 14 controls the power of the ring heater 6 and the heater 10 through PWM signal or voltage regulation.

[0032] The headspace sampler temperature measurement device provided by this utility model, through the setting of the preheating component, can preheat the reagent tube 9 by the heater 10 after the reagent tube 9 is placed inside the heat-conducting ring 8, which helps the reagent inside the reagent tube 9 to evaporate. When the moving sampling needle 5 is inserted into the reagent tube 9 for sampling, the temperature inside the reagent tube 9 is detected individually by the wireless temperature measuring probe 3. When the temperature inside the reagent tube 9 is lower than the evaporation temperature, the reagent tube 9 can be individually heated by the ring heater 6. Through the staged heating of the preheating component and the temperature compensation component, the precise temperature control of a single reagent tube 9 can be achieved, avoiding the temperature deviation caused by synchronous heating.

[0033] The working principle of this utility model is as follows: The operator inserts the reagent tube 9 into the heat-conducting ring 8, so that the bottom of the reagent tube 9 contacts the wireless temperature probe 3. The wireless temperature probe 3 is used to detect the temperature of the reagent tube 9. At the same time, the control module 14 starts the heater 10, which heats the inside of the detection platform 2 and increases the temperature of the reagent tube 9 to help the gas inside the reagent tube 9 evaporate. Then, the sampling needle 5 is moved to insert into the reagent tube 9 and the ring heater 6 contacts the heat-conducting ring 8. The wireless temperature probe 3 is used to detect the current temperature of the reagent tube 9. When the temperature of the reagent tube 9 is lower than the evaporation temperature, the wireless temperature probe 3 is used to detect the temperature inside the reagent tube 9 separately. At the same time, the ring heater 6 is started. The ring heater 6 conducts heat to the heat-conducting ring 8 to increase the temperature of the reagent tube 9 separately. The reagent tube 9 is preheated by the preheating component. Then, the ring heater 6 of the temperature compensation component is used to heat the individual reagent tube 9 a second time to avoid temperature imbalance caused by synchronous heating.

[0034] See also Figures 1-4 In a preferred embodiment of this utility model, a base 12 is provided inside the detection platform 2, and a support groove 13 is provided on the top of the base 12 to fit the bottom of the reagent tube 9. The bottom of the wireless temperature probe 3 is fixedly connected to the inner wall of the support groove 13.

[0035] In a preferred embodiment of this utility model, the control module 14 is disposed on the front side of the headspace sampler body 1, and the wireless transceiver module 15 is disposed on one side of the control module 14.

[0036] Furthermore, when the sampling needle 5 is inserted into the reagent tube 9 for sampling, the top of the heat-conducting ring 8 is in contact with the annular heater 6, which conducts the temperature to the reagent tube 9. The heat-conducting ring 8 is made of a heat-conducting metal material, which can increase the heat conduction effect.

[0037] In a preferred embodiment of this utility model, there are six sets of heaters 10, which are evenly fixed inside the detection stage 2. They can simultaneously heat multiple sets of reagent tubes 9. The inner diameter of the heat-conducting ring 8 is the same as the diameter of the reagent tube 9, so that the reagent tube 9 can be inserted into the heat-conducting ring 8 before entering the detection stage 2.

[0038] Furthermore, a rubber stopper 16 is provided at the top of the reagent tube 9, and the top of the reagent tube 9 is sealed by the rubber stopper 16. At the same time, when sampling, the sampling needle 5 can be inserted downward into the rubber stopper 16 to sample the gas inside the reagent tube 9. The control module 14 is electrically connected to the ring heater 6 and the heater 10.

[0039] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific implementation methods described. The present specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can better understand and utilize the present utility model.

Claims

1. A headspace sampler temperature measurement device, characterized by, The headspace sampler body is provided with a detection table for placing reagent tubes and a detection tube for sampling detection at the top, the inside of the detection table is provided with a wireless temperature measurement probe and a preheating assembly, the wireless temperature measurement probe is connected with the control module through the wireless transceiver module; the detection tube has a sampling end, the sampling end is provided with a sampling needle and a temperature compensation assembly for secondary heating of a single reagent tube; the preheating assembly and the temperature compensation assembly are electrically connected with the control module.

2. The headspace sampler temperature measurement device of claim 1, wherein, The preheating assembly includes a support disc, the support disc is arranged in the inside of the detection table and uniformly distributed with reagent tube holes for fixing reagent tubes in the circumferential direction, a heat conduction ring is arranged in the reagent tube hole, and the inner wall of the heat conduction ring can be attached to the outer wall of the reagent tube; the inside of the detection table is provided with a temperature increaser.

3. The headspace sampler temperature measurement device of claim 2, wherein, The temperature compensation assembly includes a sealing shell arranged outside the sampling needle, an annular heater is arranged on the inner wall of the sealing shell, the inner wall of the annular heater can be attached to the outer wall of the reagent tube and electrically heat the reagent tube.

4. The headspace sampler temperature measurement device of claim 1, wherein, The wireless temperature measurement probe is a platinum resistance temperature detector.

5. The headspace sampler temperature measurement device of claim 1, wherein, The inside of the detection table is provided with a base, the top of the base is provided with a support groove capable of being attached to the bottom of the reagent tube, and the bottom of the wireless temperature measurement probe is fixedly connected with the inner wall of the support groove.

6. The headspace sampler temperature measurement device of claim 1, wherein, The control module is arranged on the front side of the headspace sampler body, and the wireless transceiver module is arranged on one side of the control module.

7. The headspace sampler temperature measurement device of claim 3, wherein, The heat conduction ring is made of heat conduction metal material and the top of the heat conduction ring can be in contact with the annular heater.

8. The headspace sampler temperature measurement device of claim 1, wherein, The top of the reagent tube is provided with a rubber plug.

9. The headspace sampler temperature measurement device of claim 2, wherein, The temperature increaser is six groups and is uniformly fixed in the inside of the detection table.

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