Multi-channel exhaled VOC continuous sampling and synchronous thermal desorption device

Abstract

The utility model discloses a multi-channel exhaled VOC (volatile organic compound) continuous sampling and synchronous thermal desorption device which comprises a first TD box, a second TD box and a plurality of second TD pipes, wherein the first TD box is internally provided with a plurality of TD pipes; a first switching valve and a first multi-way selection valve are sequentially connected between the collecting part and the first TD box, and the collecting part is connected with an inlet of the first switching valve; the gas analysis system is connected with an outlet of the first switching valve; a second multi-way selection valve is connected between the blowing and sucking mechanism and the first TD box, the action of the blowing and sucking mechanism is synchronous with the switching of the first switching valve, and the blowing and sucking mechanism blows or sucks the first TD box. The gas sample is collected through the collection part, the first multi-way selection valve selects the corresponding TD pipe, then the direction is switched through the first switching valve, the gas sample enters the gas analysis system for analysis after gas desorption, and the blowing and sucking mechanism provides suction force or gas carrying power for the gas sample, so that continuous sample injection and real-time analysis of the gas sample are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of sampling devices, in particular to a multi-channel exhaled breath VOC continuous sampling and synchronous thermal desorption device. Background Art

[0002] The analysis of exhaled breath VOC components has begun to be applied to clinical diagnosis or on-site pathogenic screening. The analysis of exhaled breath VOC must first sample the exhaled gas of the tested person. The sampled VOC will be enriched in the TD tube, and then the TD tube will thermally desorb / thermally analyze to output the VOC to the subsequent analysis instrument for analysis and diagnosis.

[0003] The existing technology only has exhaled breath sampling or fully automatic multi-channel TD tube thermal desorption. Multiple test subjects must first be sampled uniformly and then uniformly placed on the thermal analysis device for unified injection analysis, which cannot meet the requirements of on-site continuous injection and real-time analysis results, has limited use, and is not convenient. Summary of the Utility Model

[0004] This application provides a multi-channel exhaled breath VOC continuous sampling and synchronous thermal desorption device, which solves the technical problem that the prior art cannot achieve on-site continuous injection and real-time analysis results.

[0005] This application provides a multi-channel exhaled breath VOC continuous sampling and synchronous thermal desorption device, including:

[0006] A first TD box, in which a plurality of TD tubes are arranged;

[0007] A collection part, between which and the first TD box are successively connected a first switching valve and a first multi-way selection valve, and the collection part is connected to the inlet of the first switching valve;

[0008] A gas analysis system, which is connected to the outlet of the first switching valve;

[0009] A blowing and suction mechanism, between which and the first TD box is connected a second multi-way selection valve, and the action of the blowing and suction mechanism is synchronized with the switching of the first switching valve to blow or suck the first TD box.

[0010] In some embodiments, the branch valve ports of the first multi-way selection valve and the second multi-way selection valve are respectively connected to both ends of the corresponding TD tubes in the first TD box.

[0011] In some embodiments, a second TD box is further included. A plurality of TD tubes are arranged in the second TD box. A third multi-way selector valve is arranged between the first switching valve and the second TD box. A fourth multi-way selector valve is connected between the blowing and sucking mechanism and the second TD box. The operation of the blowing and sucking mechanism is synchronized with the switching of the first switching valve to suck or blow the second TD box.

[0012] In some embodiments, the main valve ports of the first multi-way selector valve and the third multi-way selector valve are both connected to the corresponding switching ports on the first switching valve.

[0013] In some embodiments, the sub-valve ports of the third multi-way selector valve and the fourth multi-way selector valve are respectively connected to both ends of the corresponding TD tubes in the second TD box; the main valve port of the fourth multi-way selector valve is connected to the blowing and sucking mechanism.

[0014] In some embodiments, a second switching valve is further included. The main valve ports of the second multi-way selector valve and the fourth multi-way selector valve are both connected to the switching port of the second switching valve. The blowing and sucking mechanism is connected to the second switching valve.

[0015] In some embodiments, the blowing and sucking mechanism includes a vacuum pump and a carrier gas pump. The carrier gas pump is connected to the inlet of the second switching valve, and the vacuum pump is connected to the outlet of the second switching valve.

[0016] In some embodiments, the carrier gas transported by the carrier gas pump is nitrogen.

[0017] In some embodiments, the number of sub-valve ports of the first multi-way selector valve and the second multi-way selector valve is the same as the number of TD tubes in the first TD box; the number of sub-valve ports of the third multi-way selector valve and the fourth multi-way selector valve is the same as the number of TD tubes in the second TD box.

[0018] In some embodiments, the collection part is a face mask.

[0019] The beneficial effects of the present application are as follows:

[0020] The multi-channel exhaled VOC continuous sampling and synchronous thermal desorption device provided by the present application collects gas samples through the collection part, selects the corresponding TD tubes through the first multi-way selector valve, and then switches the direction through the first switching valve. After the gas is desorbed, the gas sample enters the gas analysis system for analysis. The blowing and sucking mechanism provides suction or carrier gas power for the gas sample, facilitating continuous sampling and real-time analysis of the gas sample. Description of the Drawings

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention.

[0022] Figure 1 It is a schematic structural diagram of the first state of a multi-channel exhaled breath VOC continuous sampling and synchronous thermal desorption device provided by the present application;

[0023] Figure 2 It is a schematic structural diagram of the second state of a multi-channel exhaled breath VOC continuous sampling and synchronous thermal desorption device provided by the present application.

[0024] Among them, 10 - the first TD box; 11 - the first switching valve; 12 - the first multi-way selection valve; 13 - the second multi-way selection valve;

[0025] 20 - the collection part;

[0026] 30 - the gas analysis system;

[0027] 40 - the second TD box; 41 - the third multi-way selection valve; 42 - the fourth multi-way selection valve; 43 - the second switching valve;

[0028] 51 - the vacuum pump; 52 - the carrier gas pump. Detailed implementation manners

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0030] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0031] In addition, the descriptions involving "first", "second", etc. in this application are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0032] By providing a multi-channel exhaled breath VOC continuous sampling and synchronous thermal desorption device in the embodiments of this application, the technical problem in the prior art that on-site continuous sampling and real-time analysis results cannot be achieved is solved.

[0033] The overall idea of the technical solutions in the embodiments of this application to solve the above technical problems is as follows:

[0034] As Figure 1 、 Figure 2 shown, this application provides a multi-channel exhaled breath VOC continuous sampling and synchronous thermal desorption device, including:

[0035] A first TD box 10, in which multiple TD tubes are arranged;

[0036] A collection part 20, between which and the first TD box 10, a first switching valve 11 and a first multi-way selection valve 12 are successively connected. The collection part 20 is connected to the inlet of the first switching valve 11. In this embodiment, the collection part 20 is a face mask;

[0037] A gas analysis system 30, which is connected to the outlet of the first switching valve 11;

[0038] A blowing and suction mechanism, between which and the first TD box 10, a second multi-way selection valve 13 is connected. The action of the blowing and suction mechanism is synchronized with the switching of the first switching valve 11 to blow or suck the first TD box 10.

[0039] A gas sample is collected through the collection part 20, the corresponding TD tube is selected by the first multi-way selection valve 12, and then the direction is switched through the first switching valve 11. After the gas is thermally desorbed, the gas sample enters the gas analysis system 30 for analysis. The blowing and suction mechanism provides suction or carrier gas power to the gas sample, facilitating continuous sampling and real-time analysis of the gas sample.

[0040] To better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the accompanying drawings of the specification and specific embodiments.

[0041] Specifically, the branch valve ports of the first multi-way selection valve 12 and the second multi-way selection valve 13 are respectively connected to both ends of the corresponding TD tube in the first TD box 10. When a certain TD tube is needed for gas sample sampling, the branch valve ports on the corresponding first multi-way selection valve 12 and second multi-way selection valve 13 are opened to conduct the blowing and suction mechanism and the corresponding TD tube, and the blowing and suction mechanism blows or sucks air into the corresponding TD tube.

[0042] Further, the multi-channel exhaled breath VOC continuous sampling and synchronous thermal desorption device further includes a second TD box 40. A plurality of TD tubes are arranged in the second TD box 40. A third multi-way selection valve 41 is arranged between the first switching valve 11 and the second TD box 40. A fourth multi-way selection valve 42 is connected between the blowing and suction mechanism and the second TD box 40. The action of the blowing and suction mechanism is synchronized with the switching of the first switching valve 11 to suck or blow the second TD box 40.

[0043] The main valve ports of the first multi-way selection valve 12 and the third multi-way selection valve 41 are both connected to the corresponding switching ports on the first switching valve 11.

[0044] The gas sample is collected by the collection unit 20. The third multi-way selection valve 41 selects the corresponding TD tube, and then the direction is switched through the first switching valve 11. After the gas is desorbed, the gas sample enters the gas analysis system 30 for analysis. The blowing and suction mechanism provides suction or carrier gas power for the gas sample, facilitating continuous sample injection and real-time analysis of the gas sample. When the first TD box 10 samples, the second TD box 40 is desorbed, facilitating gas sample analysis while continuous sample injection.

[0045] The branch valve ports of the third multi-way selection valve 41 and the fourth multi-way selection valve 42 are respectively connected to both ends of the corresponding TD tube in the second TD box 40; the main valve port of the fourth multi-way selection valve 42 is connected to the blowing and suction mechanism. When a certain TD tube is needed for gas sample sampling, the branch valve ports on the corresponding third multi-way selection valve 41 and fourth multi-way selection valve 42 are opened to conduct the blowing and suction mechanism and the corresponding TD tube, and the blowing and suction mechanism blows or sucks air into the corresponding TD tube.

[0046] Further, the multi-channel exhaled breath VOC continuous sampling and synchronous thermal desorption device further includes a second switching valve 43. The main valve ports of the second multi-way selection valve 13 and the fourth multi-way selection valve 42 are both connected to the switching ports of the second switching valve 43, and the blowing and suction mechanism is connected to the second switching valve 43.

[0047] Specifically, the blowing and suction mechanism includes a vacuum pump 51 and a carrier gas pump 52. The carrier gas pump 52 is connected to the inlet of the second switching valve 43, and the vacuum pump 51 is connected to the outlet of the second switching valve 43. The carrier gas transported by the carrier gas pump 52 is nitrogen.

[0048] When the first TD box 10 samples, the first switching valve 11 switches to the path of the sampling section 20 and the first multiplexing valve 12, and the second switching valve 43 switches to the path of the vacuum pump 51 and the second multiplexing valve 13. The vacuum pump 51 provides suction for gas sampling, enabling the gas sample to enter the first TD box 10. At the same time, the first switching valve 11 switches to the path of the gas analysis system 30 and the third multiplexing valve 41, and the second switching valve 43 switches to the path of the carrier gas pump 52 and the fourth multiplexing valve 42. The gas sample in the second TD box 40 is desorbed, and the carrier gas carries the gas sample into the gas analysis system 30 for analysis.

[0049] When the second TD box 40 samples, the first switching valve 11 switches to the path of the sampling section 20 and the third multiplexing valve 41, and the second switching valve 43 switches to the path of the vacuum pump 51 and the fourth multiplexing valve 42. The vacuum pump 51 provides suction for gas sampling, enabling the gas sample to enter the second TD box 40. At the same time, the first switching valve 11 switches to the path of the gas analysis system 30 and the first multiplexing valve 12, and the second switching valve 43 switches to the path of the carrier gas pump 52 and the second multiplexing valve 13. The gas sample in the first TD box 10 is desorbed, and the carrier gas carries the gas sample into the gas analysis system 30 for analysis.

[0050] It realizes that the first TD box 10 and the second TD box 40 perform gas analysis while sampling, and sampling and analysis can be synchronously and alternately executed, which is convenient to use and improves the efficiency of sampling and detection.

[0051] The number of branch valve ports of the first multiplexing valve 12 and the second multiplexing valve 13 is the same as the number of TD tubes in the first TD box 10; the number of branch valve ports of the third multiplexing valve 41 and the fourth multiplexing valve 42 is the same as the number of TD tubes in the second TD box 40. Preferably, the number of TD tubes in the first TD box 10 and the second TD box 40 is the same, and is the same as the number of branch valve ports of the first multiplexing valve 12, the second multiplexing valve 13, the third multiplexing valve 41, and the fourth multiplexing valve 42.

[0052] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0053] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims

1. A multi-channel exhaled VOC continuous sampling and synchronous thermal desorption device, characterized in that Comprising: A first TD box, in which multiple TD tubes are arranged; A collection part, between which and the first TD box, a first switching valve and a first multi-way selector valve are sequentially connected, and the collection part is connected to the inlet of the first switching valve; A gas analysis system, which is connected to the outlet of the first switching valve; A blowing and sucking mechanism, between which and the first TD box, a second multi-way selector valve is connected, and the action of the blowing and sucking mechanism is synchronized with the switching of the first switching valve to blow or suck the first TD box.

2. The multi-channel exhaled VOC continuous sampling and synchronous thermal desorption device according to claim 1, wherein The branch valve ports of the first multi-way selector valve and the second multi-way selector valve are respectively connected to both ends of the corresponding TD tubes in the first TD box.

3. The multi-channel exhaled VOC continuous sampling and synchronous thermal desorption device according to claim 1, wherein It further comprises a second TD box, in which multiple TD tubes are arranged, a third multi-way selector valve is arranged between the first switching valve and the second TD box, a fourth multi-way selector valve is connected between the blowing and sucking mechanism and the second TD box, and the action of the blowing and sucking mechanism is synchronized with the switching of the first switching valve to suck or blow the second TD box.

4. The multi-channel exhaled VOC continuous sampling and synchronous thermal desorption device according to claim 3, wherein The main valve ports of the first multi-way selector valve and the third multi-way selector valve are both connected to the corresponding switching ports on the first switching valve.

5. The multi-channel exhaled VOC continuous sampling and synchronous thermal desorption device according to claim 3, wherein, The branch valve ports of the third multi-way selector valve and the fourth multi-way selector valve are respectively connected to both ends of the corresponding TD tubes in the second TD box; the main valve port of the fourth multi-way selector valve is connected to the blowing and sucking mechanism.

6. The multi-channel exhaled VOC continuous sampling and synchronous thermal desorption device according to claim 3, characterized in that, It further comprises a second switching valve, the main valve ports of the second multi-way selector valve and the fourth multi-way selector valve are both connected to the switching ports of the second switching valve, and the blowing and sucking mechanism is connected to the second switching valve.

7. The multi-channel exhaled VOC continuous sampling and synchronous thermal desorption device according to claim 6, wherein, The blowing and sucking mechanism comprises a vacuum pump and a carrier gas pump, the carrier gas pump is connected to the inlet of the second switching valve, and the vacuum pump is connected to the outlet of the second switching valve.

8. The multi-channel exhaled VOC continuous sampling and synchronous thermal desorption device according to claim 7, characterized in that, The carrier gas transported by the carrier gas pump is nitrogen.

9. The multi-channel exhaled VOC continuous sampling and synchronous thermal desorption device according to claim 3, wherein The number of branch valve ports of the first multi-way selector valve and the second multi-way selector valve is the same as the number of TD tubes in the first TD box; the number of branch valve ports of the third multi-way selector valve and the fourth multi-way selector valve is the same as the number of TD tubes in the second TD box.

10. The multi-channel exhaled VOC continuous sampling and synchronous thermal desorption device according to claim 1, characterized in that, The collection part is a face mask.

Images