Gas thermal desorption device and gas collection thermal desorption system

Abstract

The embodiment of the utility model relates to a gas thermal desorption device and a gas collection thermal desorption system. The gas thermal desorption device comprises a heating structure, a sleeve and a supporting piece, the supporting piece is provided with a supporting face for supporting the sleeve, the sleeve is erected on the supporting face, and a heat dissipation space is formed between the sleeve and the bottom wall of the supporting piece. The sleeve is provided with a containing cavity used for containing an adsorption pipe for adsorbing sampling gas. The heating structure is located in the containing cavity and wraps and is attached to the outer wall face of the adsorption pipe so as to heat the sampling gas in the adsorption pipe. In other words, the heating structure is matched with the adsorption tube in a direct heat transfer manner, so that the adsorption tube is rapidly heated by the heating structure, the sampling gas adsorbed in the adsorption tube is rapidly heated, and the heating efficiency is improved. Meanwhile, a heat dissipation space is formed between the bottom walls of the sleeve supporting pieces, so that the ventilation effect of the sleeve supporting pieces is improved, heat is rapidly released outwards, and rapid cooling of the adsorption pipe is achieved.

Description

Technical Field

[0001] The embodiments of the utility model relate to the technical field of medical gas detection, and in particular to a gas thermal desorption device and a gas collection thermal desorption system. Background Art

[0002] In the field of medical gas detection, the gas exhaled by the patient often needs to be adsorbed onto an adsorption tube and then heated and discharged for gas detection and analysis.

[0003] The conventional gas adsorption and heating process is as follows: the patient's exhaled gas is first concentrated in the adsorption tube. Then the adsorption tube is heated by a heating structure mounted on the outer wall of the adsorption tube to heat the gas, and then the gas adsorbed on the adsorption tube is heated for detection and analysis.

[0004] Specifically, the heating structure usually includes a heating rod and a fixed block mounted on the outer periphery of the heating rod. After the heating rod transfers heat to the fixed block, the heat is then conducted to the adsorption tube in contact with the fixed block for heat exchange, thereby heating the adsorption tube.

[0005] However, after the fixing block is heated by the heating rod, the fixing block transfers heat to the adsorption tube to operate the adsorption tube, which results in a longer heating time for the adsorption tube and a longer cooling time for the adsorption tube. Utility Model Content

[0006] In order to solve the above technical problems or at least partially solve the above technical problems, the embodiments of the utility model provide a gas thermal desorption device and a gas collection thermal desorption system.

[0007] In a first aspect, an embodiment of the utility model provides a gas thermal desorption device, including a heating structure, a sleeve and a support member;

[0008] The support member is provided with a support surface for supporting the sleeve, the sleeve is mounted on the support surface and a heat dissipation space is provided between the sleeve and the bottom wall of the support member;

[0009] The sleeve has a receiving cavity for receiving an adsorption tube for adsorbing sampled gas; the heating structure is located in the receiving cavity and covers and adheres to the outer wall surface of the adsorption tube to heat the sampled gas in the adsorption tube.

[0010] In some embodiments, there are at least two heating structures, and the sleeve includes at least two accommodating cavities. Each of the accommodating cavities is provided with an adsorption tube and a heating structure, and the heating structure is coated and attached to the outer wall surface of the corresponding adsorption tube.

[0011] In some embodiments, the heating structure includes at least two heating rods, and the at least two heating rods are arranged at intervals along the circumference of the adsorption tube;

[0012] And / or, the outer diameter of each heating rod is not greater than 3 mm.

[0013] In some embodiments, the sleeve is provided with a heat dissipation groove;

[0014] There are at least two heat dissipation grooves, and at least two heat dissipation grooves are arranged at intervals along the circumference of the sleeve.

[0015] In some embodiments, the sleeve comprises a first tube segment and at least one second tube segment, and the first tube segment and at least one second tube segment together enclose at least one accommodating cavity;

[0016] The first pipe segment and the second pipe segment are provided with fixing members connected to the supporting member on their outer sleeves, and the fixing members are connected to the first pipe segment and the second pipe segment respectively.

[0017] In some embodiments, a first connecting portion is provided on the support member, a second connecting portion is provided on the fixing member at a position corresponding to the first connecting portion, and the fixing member is connected to the support member through the cooperation of the first connecting portion and the second connecting portion.

[0018] In some embodiments, the fixing member includes a first shell and a second shell, and the first shell and the second shell are connected and enclosed to form a clamping space for clamping the sleeve;

[0019] And / or, there are at least two fixing members, and at least two of the fixing members are spaced apart along the length direction of the sleeve.

[0020] In some embodiments, the support member includes a support bottom plate and at least two support side plates;

[0021] At least two of the support side plates are located on the same side of the support bottom plate and are arranged in parallel and spaced apart along the length direction of the support bottom plate, all of the support side plates extend along the width direction of the support bottom plate, and ends of all of the support side plates away from the support bottom plate are flush;

[0022] Among all the supporting side plates, at least two of the supporting side plates are provided with a supporting surface at one end away from the supporting bottom plate, the fixing member is connected to the supporting surface, and a heat dissipation space is provided between the sleeve and the supporting bottom plate.

[0023] In some embodiments, one end of the supporting side plate away from the supporting bottom plate has a concave groove that is concave toward the supporting bottom plate, and the concave groove wall surface forms the supporting surface;

[0024] And / or, there are at least two supporting surfaces on the same supporting side plate, and at least two of the supporting surfaces are arranged at intervals along the width direction of the supporting bottom plate.

[0025] In a second aspect, an embodiment of the utility model provides a gas collection thermal desorption system, including an adsorption tube, a first gas pipeline, a second gas pipeline, a control valve, and a gas thermal desorption device as described above;

[0026] The first gas pipeline has a first inlet for the sampled gas to flow in and a first outlet for the sampled gas to flow out; the second gas pipeline has a second inlet for the air to enter and a second outlet for the air to be discharged;

[0027] The control valve is used to control the adsorption tube to be connected to one of the first outlet and the second outlet, and to control the adsorption tube to be disconnected from the other of the first outlet and the second outlet.

[0028] Compared with the prior art, the technical solution provided by the embodiment of the utility model has the following advantages:

[0029] The embodiment of the utility model provides a gas thermal desorption device and a gas collection thermal desorption system, and the gas thermal desorption device includes a heating structure, a sleeve and a support. A support surface for supporting the sleeve is provided on the support, and the sleeve is mounted on the support surface and a heat dissipation space is provided between the sleeve and the bottom wall of the support. The sleeve has a receiving cavity for accommodating an adsorption tube for adsorbing sampled gas. The heating structure is located in the receiving cavity and is coated and fitted on the outer wall surface of the adsorption tube to heat the sampled gas in the adsorption tube. In other words, the gas thermal desorption device provided by the embodiment of the utility model accommodates the adsorption tube by providing a sleeve, and a heating structure coated and fitted on the outer wall surface of the adsorption tube is provided in the sleeve, so that the heating structure can quickly heat and increase the temperature of the adsorption tube through direct heat transfer between the heating structure and the adsorption tube, thereby realizing rapid heating of the sampled gas adsorbed in the adsorption tube, thereby improving the heating efficiency. At the same time, since the sleeve is mounted on the support surface of the support and has a heat dissipation space between it and the bottom wall of the support, its ventilation area and ventilation effect can be increased, so that the heat transferred from the adsorption tube to the sleeve can be quickly released to the outside, thereby achieving rapid cooling of the adsorption tube. It can be seen that the gas thermal desorption device of this embodiment can not only achieve rapid heating of the adsorption tube but also achieve rapid heat dissipation and cooling of the adsorption tube, so it can effectively improve the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the embodiments of the utility model, and together with the description, are used to explain the principles of the embodiments of the utility model.

[0031] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0032] Figure 1 This is a schematic diagram of the structure of the gas thermal desorption device according to an embodiment of the utility model;

[0033] Figure 2 This is a schematic structural diagram of a fixing member of a gas thermal desorption device according to an embodiment of the utility model;

[0034] Figure 3 This is a schematic structural diagram of the first pipe section of the gas thermal desorption device according to an embodiment of the utility model;

[0035] Figure 4 This is a schematic structural diagram of the second pipe section of the gas thermal desorption device according to an embodiment of the utility model;

[0036] Figure 5 This is a schematic structural diagram of a support member of a gas thermal desorption device according to an embodiment of the utility model.

[0037] Among them, 1. heating structure; 11. heating rod; 2. sleeve; 21. accommodating cavity; 22. heat dissipation groove; 23. first pipe section; 24. second pipe section; 25. second fixing hole; 26. semicircular shell; 27. connecting part; 3. support member; 31. supporting surface; 32. heat dissipation space; 33. first connecting part; 34. supporting bottom plate; 35. supporting side plate; 36. recessed groove; 4. adsorption tube; 5. fixing member; 51. second connecting part; 52. first shell; 53. second shell; 54. clamping space; 55. first fixing hole. DETAILED DESCRIPTION

[0038] In order to more clearly understand the above-mentioned purposes, features and advantages of the embodiments of the present invention, the scheme of the embodiments of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0039] In the following description, many specific details are set forth to facilitate a full understanding of the embodiments of the utility model, but the embodiments of the utility model can also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the utility model, rather than all of the embodiments.

[0040] Reference Figures 1 to 5As shown, this embodiment provides a gas thermal desorption device, including a heating structure 1, a sleeve 2 and a support member 3.

[0041] The support member 3 is provided with a support surface 31 for supporting the sleeve 2 . The sleeve 2 is mounted on the support surface 31 and a heat dissipation space 32 is defined between the sleeve 2 and the bottom wall of the support member 3 .

[0042] The sleeve 2 has a receiving cavity 21 for receiving the adsorption tube 4 for adsorbing the sampled gas. The heating structure 1 is located in the receiving cavity 21 and covers and fits on the outer wall surface of the adsorption tube 4 to heat the sampled gas in the adsorption tube 4.

[0043] In a specific implementation, a support surface 31 is provided on the support member 3 for supporting the sleeve 2, so that the sleeve 2 can be mounted on the support surface 31 and a heat dissipation space 32 is formed between the sleeve 2 and the bottom wall of the support member 3, so as to increase the ventilation area of ​​the sleeve 2 and achieve rapid heat dissipation.

[0044] The sleeve 2 has a accommodating cavity 21, and the adsorption tube 4 can be arranged in the accommodating cavity 21 and covered and bonded with the heating structure 1 located in the accommodating cavity 21, so that the heating structure 1 and the adsorption tube 4 are directly bonded and contacted to realize direct heat transfer, so that the heating structure 1 can quickly heat the adsorption tube 4, and then realize rapid heating of the sampling gas adsorbed in the adsorption tube 4, thereby realizing the thermal desorption operation of the sampling gas.

[0045] That is to say, in this embodiment, when it is necessary to perform a thermal desorption operation on the sampled gas in the adsorption tube 4, the adsorption tube 4 can be quickly heated by direct contact between the heating structure 1 and the adsorption tube 4, so as to shorten the heating and temperature rise time of the sampled gas. After the sampled gas is heated and the temperature rises, since there is a heat dissipation space 32 between the sleeve 2 and the bottom wall of the support member 3, the ventilation area and ventilation effect of the sleeve 2 are improved, so that the adsorption tube 4 can conduct the heat to the sleeve 2, and then quickly release the heat to the outside through the sleeve 2, so as to shorten the heat dissipation and cooling time of the adsorption tube 4.

[0046] In addition, it should be noted that in the related art, a fixed block needs to be set up to support the fixed heating rod, and after the fixed block is heated by the heating rod, the heat is transferred to the adsorption tube through the fixed block, thereby realizing the heating operation of the adsorption tube. Therefore, in the whole process, the heating rod needs to heat the fixed block as a whole to the required temperature before the fixed block can heat the adsorption tube to the required temperature. Conversely, the process of heat dissipation by the adsorption tube also needs to transfer the heat to the fixed block and then dissipate the heat through the fixed block. Therefore, in the related art, the heating speed and heat dissipation speed of the adsorption tube are directly related to the volume of the fixed block. The larger the volume of the fixed block, the slower the heat dissipation and heating speed of the adsorption tube, and the smaller the volume of the fixed block, the faster the heat dissipation and heating speed of the adsorption tube.

[0047] It can be seen that the heat transfer achieved through the fixed block in the prior art will result in slow heat dissipation and heating speed of the adsorption tube. In the present embodiment, the heating structure 1 directly contacts and transfers heat with the adsorption tube 4, which can effectively increase the heating speed of the adsorption tube 4, and the heat dissipation effect is increased by forming a heat dissipation space 32 between the sleeve 2 and the bottom wall of the support member 3, thereby effectively increasing the heat dissipation speed of the adsorption tube 4.

[0048] It is found through testing that in the related art, the time required to heat the adsorption tube 4 from 33°C to 265°C is five minutes, and the time required to cool the adsorption tube 4 from 265°C to 33°C is twenty minutes. In this embodiment, the time required to heat the adsorption tube 4 from 33°C to 265°C is seventy seconds, and the time required to cool the adsorption tube 4 from 265°C to 33°C is eight minutes. It can be seen that the gas thermal desorption device of this embodiment can achieve the heating and cooling of the adsorption tube 4 more quickly and efficiently.

[0049] For example, in order to improve the heat dissipation effect of the entire device, the sleeve 2, the support member 3, etc. can be configured to be made of aluminum alloy or other materials with good thermal conductivity.

[0050] The gas thermal desorption device of this embodiment is provided with a sleeve 2 to accommodate the adsorption tube 4, and a heating structure 1 is provided in the sleeve 2 to cover and fit the outer wall of the adsorption tube 4, so that the heating structure 1 can quickly heat and increase the temperature of the adsorption tube 4 through direct heat transfer between the heating structure 1 and the adsorption tube 4, thereby realizing rapid heating of the sampled gas adsorbed in the adsorption tube 4, thereby improving the heating efficiency. At the same time, since the sleeve 2 is mounted on the support surface 31 of the support member 3 and has a heat dissipation space 32 between the sleeve 2 and the bottom wall of the support member 3, its ventilation area and ventilation effect can be increased, so that the heat transferred from the adsorption tube 4 to the sleeve 2 can be quickly released to the outside, thereby realizing rapid cooling of the adsorption tube 4. It can be seen that the gas thermal desorption device of this embodiment can not only realize rapid heating of the adsorption tube 4 but also realize rapid heat dissipation and cooling of the adsorption tube 4, thereby effectively improving the detection efficiency.

[0051] Reference Figure 1 As shown, in some embodiments, there are at least two heating structures 1, and the sleeve 2 includes at least two accommodating cavities 21. Each accommodating cavity 21 is provided with an adsorption tube 4 and a heating structure 1, and the heating structure 1 is coated and attached to the outer wall surface of the corresponding adsorption tube 4.

[0052] In specific implementation, when at least two adsorption tubes 4 need to be heated at the same time, at this time, at least two accommodating cavities 21 can be provided in the sleeve 2 and at least two heating structures 1 can be provided, so that an adsorption tube 4 and a heating structure 1 are provided in each accommodating cavity 21, so that the corresponding adsorption tube 4 can be heated by the corresponding heating structure 1, thereby improving the detection efficiency.

[0053] For example, refer to Figure 1 As shown, there may be two accommodating cavities 21, two adsorption tubes 4 and two heating structures 1. Alternatively, in other implementations, there may be three or more accommodating cavities 21, two adsorption tubes 4 and two heating structures 1.

[0054] Reference Figure 1 As shown, in some embodiments, the heating structure 1 includes at least two heating rods 11, and the at least two heating rods 11 are arranged at intervals along the circumference of the adsorption tube 4, so that the adsorption tube 4 can be heated by the at least two heating rods 11 at the same time, so as to further improve the heating speed of the adsorption tube 4, and then improve the thermal desorption efficiency of the sampling gas in the adsorption tube 4.

[0055] For example, refer to Figure 1 As shown, each heating structure 1 can be configured to include six heating rods 11. Alternatively, in other implementations, each heating structure 1 can also be configured to include three, four, or five heating rods 11. The specific number of heating rods 11 can be set according to actual needs, and this embodiment does not specifically limit this.

[0056] In some embodiments, the outer diameter of each heating rod 11 is no more than 3 mm, so that its overall volume is small, which can effectively reduce the overall size of the entire gas thermal desorption device, thereby reducing the heat required for heating the entire gas thermal desorption device, and then shortening the time required for heating. At the same time, the heat storage of the entire gas thermal desorption device is reduced, which helps to dissipate heat and shorten the heat dissipation time.

[0057] Exemplarily, the outer diameter of the heating rod 11 may be, for example, 3 mm or 2.8 mm.

[0058] Reference Figure 1 , Figure 3 and Figure 4 As shown, in some embodiments, a heat dissipation groove 22 is provided on the sleeve 2. The heat dissipation groove 22 can further increase the outer surface area of ​​the sleeve 2, thereby increasing the heat dissipation area to achieve rapid heat dissipation and temperature reduction.

[0059] Exemplarily, there are at least two heat dissipation grooves 22, and at least two heat dissipation grooves 22 are arranged at intervals along the circumference of the sleeve 2. For example, the heat dissipation grooves 22 can be set to two or more. Figure 1 Six shown.

[0060] Reference Figure 1 , Figure 3 and Figure 4 As shown, in some embodiments, the sleeve 2 includes a first tube segment 23 and at least one second tube segment 24 , and the first tube segment 23 and the at least one second tube segment 24 together enclose at least one accommodating cavity 21 .

[0061] A fixing member 5 connected to the support member 3 is disposed outside the first pipe section 23 and the second pipe section 24 , and the fixing member 5 is connected to the first pipe section 23 and the second pipe section 24 , respectively.

[0062] In specific implementation, the second pipe section 24 can be set as one or more Figure 1 As shown in the figure, the number of the second pipe segments 24 is consistent with the number of the accommodating chambers 21. For example, when two adsorption tubes 4 need to be heated at the same time, two second pipe segments 24 can be provided, and the two second pipe segments 24 are simultaneously connected to the first pipe segment 23 and enclose two accommodating chambers 21.

[0063] Furthermore, a fixing part 5 is arranged outside the first pipe segment 23 and the second pipe segment 24, and the fixing part 5 is used to connect with the support member 3 and the first pipe segment 23 and the second pipe segment 24, which can not only realize the function of reliably connecting the first pipe segment 23 and the second pipe segment 24 together, but also enable the sleeve 2 to be reliably fixed on the support member 3.

[0064] Exemplarily, a first fixing hole 55 can be provided on the fixing member 5, and a second fixing hole 25 can be provided on the first pipe segment 23 and the second pipe segment 24, and the connection between the fixing member 5 and the corresponding first pipe segment 23 and the second pipe segment 24 is achieved by fasteners inserted into the first fixing hole 55 and the second fixing hole 25.

[0065] For example, when there are two second pipe segments 24, in order to allow the first pipe segment 23 and the two second pipe segments 24 to enclose and form two accommodating chambers 21, the first pipe segment 23 may include: Figure 3 The two semicircular shells 26 shown can be connected as a whole through a connecting portion 27 , and each semicircular shell 26 can be enclosed with a second pipe section 24 to form a receiving chamber 21 .

[0066] Reference Figures 1 to 5 As shown, in some embodiments, a first connection portion 33 is provided on the support member 3, and a second connection portion 51 is provided on the fixing member 5 at a position corresponding to the first connection portion 33, and the fixing member 5 is connected to the support member 3 through the cooperation of the first connection portion 33 and the second connection portion 51.

[0067] Exemplarily, the first connection portion 33 and the second connection portion 51 may both be connection holes, and the fastener is inserted into the connection hole to achieve reliable connection between the support member 3 and the fixing member 5. Alternatively, one of the first connection portion 33 and the second connection portion 51 is a snap-fit ​​protrusion, and the other of the first connection portion 33 and the second connection portion 51 is a snap-fit ​​hole, and the support member 3 and the fixing member 5 are reliably connected by snap-fitting the snap-fit ​​protrusion with the snap-fit ​​hole.

[0068] Exemplarily, the number of first connection parts 33 can be at least two, and the number of second connection parts 51 can be at least two and correspond one to one with the first connection parts 33 , so that the connection reliability between the support member 3 and the fixing member 5 can be further improved by the cooperation of at least two first connection parts 33 and the second connection parts 51 .

[0069] Reference Figure 1 and Figure 2 As shown, in some embodiments, the fixing member 5 includes a first shell 52 and a second shell 53, and the first shell 52 and the second shell 53 are connected and enclosed to form a clamping space 54 for clamping the sleeve 2, so that the sleeve 2 is clamped in the clamping space 54 and connected to the first shell 52 and the second shell 53, thereby realizing a reliable connection between the sleeve 2 and the fixing member 5.

[0070] like Figure 1 and Figure 2 As shown, the fixing member 5 may be a clamp member, and the first shell 52 and the second shell 53 may be two semicircular clamp segments of the clamp member, so that a clamping space 54 for clamping the sleeve 2 is formed by connecting and enclosing the two semicircular clamp segments.

[0071] Exemplarily, the first shell 52 and the second shell 53 may be fixed by bolts or by clamping.

[0072] When implementing it, refer to Figure 1 As shown, there are at least two fixing members 5, and the at least two fixing members 5 are spaced apart along the length direction of the sleeve 2, so that the sleeve 2 can be fixed by the at least two fixing members 5 and a reliable connection between the sleeve 2 and the support member 3 can be achieved.

[0073] Reference Figure 1 and Figure 5 As shown, in some embodiments, the support member 3 includes a support bottom plate 34 and at least two support side plates 35 .

[0074] At least two supporting side plates 35 are located on the same side of the supporting bottom plate 34 and along the length direction of the supporting bottom plate 34 (refer to Figure 5 x direction shown in FIG. 1 ), all the supporting side plates 35 are arranged in parallel and spaced apart from each other along the width direction of the supporting bottom plate 34 (refer to FIG. 1 ). Figure 5The supporting side plates 35 extend in the y direction as shown in the figure, and the ends of all the supporting side plates 35 away from the supporting bottom plate 34 are flush.

[0075] Among all the supporting side plates 35 , at least two supporting side plates 35 are provided with a supporting surface 31 at one end away from the supporting bottom plate 34 , the fixing member 5 is connected to the supporting surface 31 , and a heat dissipation space 32 is provided between the sleeve 2 and the supporting bottom plate 34 .

[0076] That is to say, the supporting side plate 35 is arranged on the upper surface of the supporting bottom plate 34, and the top end of the supporting side plate 35 can form a supporting surface 31, the sleeve 2 is arranged on the supporting surface 31 and a heat dissipation space 32 is formed between the sleeve 2 and the supporting bottom plate 34, thereby achieving the purpose of supporting the sleeve 2 to increase its heat dissipation area and ventilation effect.

[0077] Exemplarily, two supporting side plates 35 may be provided, for example. In this case, the top ends of the two supporting side plates 35 are both provided with supporting surfaces 31 , and the supporting surfaces 31 are flush, so as to stably support the sleeve 2 .

[0078] Exemplarily, two supporting surfaces 31 may be provided on each supporting side plate 35 , and the two supporting surfaces 31 are spaced apart along the width direction of the supporting bottom plate 34 , so as to support two second pipe sections 24 when two second pipe sections 24 are provided.

[0079] Exemplarily, the support bottom plate 34 and the support side plates 35 may be fixed by bonding or clamping. Alternatively, the support bottom plate 34 and the support side plates 35 may be integrally formed to save manufacturing steps and improve the structural strength of the entire support member 3.

[0080] Reference Figure 5 As shown, in some embodiments, one end of the support side plate 35 away from the support bottom plate 34 has a recessed groove 36 recessed in a direction close to the support bottom plate 34, and the groove wall of the recessed groove 36 forms a support surface 31, so that the recessed groove 36 can wrap part of the sleeve 2, making the installation of the sleeve 2 on the support surface 31 more stable and reliable.

[0081] Reference Figures 1 to 5 As shown, this embodiment also provides a gas collection thermal desorption system, including an adsorption tube 4, a first gas pipeline, a second gas pipeline, a control valve and a gas thermal desorption device.

[0082] The specific structure and implementation principle of the gas thermal desorption device in this embodiment are the same as the structure of the gas thermal desorption device provided in Example 1, and can bring the same or similar technical effects, which will not be described one by one here, and the details can be referred to the description of Example 1.

[0083] In a specific implementation, the first gas pipeline has a first inlet for the sampled gas to flow in and a first outlet for the sampled gas to flow out; the second gas pipeline has a second inlet for the air to enter and a second outlet for the air to be discharged.

[0084] The control valve is used to control the adsorption tube 4 to be connected to one of the first outlet and the second outlet, and to control the adsorption tube 4 to be disconnected from the other of the first outlet and the second outlet.

[0085] For example, when it is necessary to deposit and adsorb the sampled gas in the adsorption tube, the control valve can be used to control the first outlet to be connected to the adsorption tube and the second outlet to be disconnected from the adsorption tube, so that the sampled gas can enter the adsorption tube through the first inlet and the first outlet and be adsorbed and deposited in the adsorption tube. After the adsorption deposition is completed, the adsorption tube can be heated by the heating structure so that the sampled gas adsorbed in the adsorption tube is heated to achieve thermal desorption. When the heating is completed, the control valve can be used to control the first outlet to be disconnected from the adsorption tube and the second outlet to be connected to the adsorption tube, so that air can enter the adsorption tube through the second inlet and the second outlet, and the sampled gas after thermal desorption in the adsorption tube is blown so that the sampled gas is discharged through the outlet end of the adsorption tube and then collected for detection and analysis.

[0086] Exemplarily, the sampled gas may be gas exhaled by a patient.

[0087] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0088] The above description is only a specific implementation of the embodiment of the utility model, so that those skilled in the art can understand or implement the embodiment of the utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the embodiment of the utility model. Therefore, the embodiment of the utility model will not be limited to these embodiments described herein, but will conform to the widest range consistent with the principles and novel features of the embodiment of the utility model described herein.

Claims

1. A gas thermal desorption device, characterized in that: It comprises a heating structure (1), a sleeve (2) and a support member (3); The sleeve (2) has a receiving cavity (21) for receiving an adsorption tube (4) for adsorbing sampled gas; the heating structure (1) is located in the receiving cavity (21) and covers and adheres to the outer wall surface of the adsorption tube (4) to heat the sampled gas in the adsorption tube (4); The support member (3) is provided with a support surface (31) for supporting the sleeve (2); the sleeve (2) is mounted on the support surface (31); and a heat dissipation space (32) is provided between the sleeve (2) and the bottom wall of the support member (3).

2. The gas thermal desorption device according to claim 1, characterized in that: There are at least two heating structures (1), and the sleeve (2) includes at least two accommodating cavities (21). Each of the accommodating cavities (21) is provided with an adsorption tube (4) and a heating structure (1), and the heating structure (1) is coated and attached to the outer wall surface of the corresponding adsorption tube (4).

3. The gas thermal desorption device according to claim 1, characterized in that: The heating structure (1) comprises at least two heating rods (11), and the at least two heating rods (11) are arranged at intervals along the circumference of the adsorption tube (4); And / or, the outer diameter of each heating rod (11) is not greater than 3 mm.

4. The gas thermal desorption device according to claim 1, characterized in that: The sleeve (2) is provided with a heat dissipation groove (22); There are at least two heat dissipation grooves (22), and the at least two heat dissipation grooves (22) are arranged at intervals along the circumference of the sleeve (2).

5. The gas thermal desorption device according to claim 1, characterized in that: The sleeve (2) comprises a first pipe section (23) and at least one second pipe section (24), wherein the first pipe section (23) and the at least one second pipe section (24) together enclose at least one accommodating cavity (21); The first pipe section (23) and the second pipe section (24) are provided with fixing members (5) connected to the support member (3) on their outer shells, and the fixing members (5) are connected to the first pipe section (23) and the second pipe section (24) respectively.

6. The gas thermal desorption device according to claim 5, characterized in that: The support member (3) is provided with a first connecting portion (33), and the fixing member (5) is provided with a second connecting portion (51) at a position corresponding to the first connecting portion (33); the fixing member (5) is connected to the support member (3) through the cooperation of the first connecting portion (33) and the second connecting portion (51).

7. The gas thermal desorption device according to claim 5, characterized in that: The fixing member (5) comprises a first shell (52) and a second shell (53), wherein the first shell (52) and the second shell (53) are connected and enclosed to form a clamping space (54) for clamping the sleeve (2); And / or, there are at least two fixing members (5), and at least two fixing members (5) are arranged at intervals along the length direction of the sleeve (2).

8. The gas thermal desorption device according to claim 5, characterized in that: The support member (3) comprises a support bottom plate (34) and at least two support side plates (35); At least two of the support side plates (35) are located on the same side of the support bottom plate (34) and are arranged in parallel and spaced apart along the length direction of the support bottom plate (34); all of the support side plates (35) extend along the width direction of the support bottom plate (34) and ends of all of the support side plates (35) away from the support bottom plate (34) are flush; Among all the supporting side plates (35), at least two of the supporting side plates (35) are provided with the supporting surface (31) at one end away from the supporting bottom plate (34), the fixing member (5) is connected to the supporting surface (31), and the heat dissipation space (32) is formed between the sleeve (2) and the supporting bottom plate (34).

9. The gas thermal desorption device according to claim 8, characterized in that: One end of the supporting side plate (35) away from the supporting bottom plate (34) has a recessed groove (36) recessed in a direction close to the supporting bottom plate (34), and the groove wall surface of the recessed groove (36) forms the supporting surface (31); And / or, there are at least two supporting surfaces (31) on the same supporting side plate (35), and at least two supporting surfaces (31) are arranged at intervals along the width direction of the supporting bottom plate (34).

10. A gas collection thermal desorption system, characterized in that: It comprises an adsorption tube (4), a first gas pipeline, a second gas pipeline, a control valve and a gas thermal desorption device as claimed in any one of claims 1 to 9; The first gas pipeline has a first inlet for the sampled gas to flow in and a first outlet for the sampled gas to flow out; the second gas pipeline has a second inlet for the air to enter and a second outlet for the air to be discharged; The control valve is used to control the adsorption tube (4) to be connected to one of the first outlet and the second outlet, and to control the adsorption tube (4) to be disconnected from the other of the first outlet and the second outlet.

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