A device for detecting components of human breath

Abstract

The present invention relates to the field of gas detection technology, and specifically to a human breath component detection device including a gas source component, a first chromatographic separation component, a second chromatographic separation component and a third chromatographic separation component. A first sampling component and a second sampling component are installed in parallel at the outlet end of the gas source component; the third chromatographic separation component is connected to the outlet end of the second sampling component, and the outlet end of the third chromatographic separation component is connected to a photoionization sulfur detection component. By setting up a photoionization sulfur detection component to detect sulfur-containing compounds, photoions and photoelectrons are used to collide with sulfide molecules to form ions, which are collected by electrodes and amplified by back-end circuits to form electrical signals, and microwave ionization is used to excite non-ionized sulfides to release characteristic spectra, which are detected by photodetectors. The electrical signals and optical signals are superimposed after processing, which can improve the detection capability of sulfide gas molecules.

Description

Technical Field

[0001] The invention relates to the technical field of gas detection, and in particular to a device for detecting components of human breath. Background Art

[0002] As a metabolic product of the human body, exhaled breath is closely related to human health. How to better detect exhaled breath is a hot issue in the current medical field. It is currently a common practice to use the principle of gas chromatography for detection. However, conventional gas chromatography detection has a low recognition rate for exhaled breath components and can only identify a single or partial gas. The detection limit is poor and cannot meet the needs of diagnosis. For example, when diagnosing oral flora and liver function, the detection limit of odorous gases such as dimethyl sulfide is required to reach 8ppb. When diagnosing the life span of red blood cells, it is required to deduct carbon monoxide in the ambient air and accurately determine the concentration of endogenous carbon monoxide. The concentration of carbon monoxide in the ambient air is generally 0.3ppm-1ppm, which requires the instrument to have the ability to accurately quantify carbon monoxide below 0.3ppm.

[0003] In the prior art, the detection of breath badness molecules such as hydrogen sulfide, methyl mercaptan, and dimethyl sulfide in the laboratory generally uses flame photometry, hydrogen flame ionization detector, pulsed flame photometry detector, or sulfur chemiluminescence detector, and the detection limit is generally tens of ppb, which cannot meet the requirements for breath detection. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the lower limit of detection of odorous gases such as dimethyl sulfide in the breath component detection device in the prior art cannot detect the required level, thereby providing a human breath component detection device.

[0005] In order to solve the above technical problems, the present invention provides a human breath component detection device, comprising:

[0006] A gas source component, the outlet end of which is connected in parallel with a first injection component and a second injection component;

[0007] A first chromatographic separation component is connected to the outlet end of the first sample injection assembly, and the outlet end of the first chromatographic separation component is connected to a carbon dioxide detection component;

[0008] A second chromatographic separation component is connected in parallel with the first chromatographic separation component and is connected to the outlet end of the first injection assembly, and the outlet end of the second chromatographic separation component is connected to a combustible gas detection component;

[0009] The third chromatographic separation component is connected to the outlet end of the second sample injection assembly, and the outlet end of the third chromatographic separation component is connected to the photoionization sulfur detection component.

[0010] Optionally, the photoionization sulfur detection element includes:

[0011] An ionization chamber is provided with a gas inlet and a gas outlet, and a photoelectric sensor is installed on the inner wall of the ionization chamber, and the photoelectric sensor is arranged close to the gas outlet;

[0012] An ultraviolet source is arranged toward the inner cavity of the ionization chamber, and is suitable for emitting ultraviolet light into the ionization chamber to photoionize particles in the ionization chamber;

[0013] The microwave generating source is suitable for emitting microwaves into the ionization chamber so as to cause microwave ionization of particles in the ionization chamber.

[0014] Optionally, the ultraviolet source is installed upstream of the microwave source.

[0015] Optionally, light-transmitting glass is installed on the side wall of the ionization chamber, and the ultraviolet generating source is arranged toward the light-transmitting glass.

[0016] Optionally, a surface of the light-transmitting glass facing the inner cavity of the ionization chamber is coated with a low-dimensional nanomaterial coating.

[0017] Optionally, the combustible gas detection device includes:

[0018] A detection cell body is provided with a pair of detection chambers, each of which is provided with a detection element, the pair of detection elements are arranged in parallel, one pole of the detection element is connected to a power source, and the other pole is suitable for being electrically connected to a signal output element;

[0019] The carrier gas flow channel is arranged through the detection cell body, and the carrier gas flow channel is connected with a pair of detection chambers in sequence.

[0020] Optionally, the carrier gas flow channel includes a carrier gas inlet channel, an intermediate channel and a carrier gas output channel which are connected in sequence, the carrier gas inlet channel connects one of the detection chambers with the outside, the carrier gas output channel connects the other detection chamber with the outside, and the intermediate channel is arranged between a pair of detection chambers to connect the pair of detection chambers.

[0021] Optionally, the output end of the carrier gas inlet channel is communicated with the bottom of the detection chamber, and the input end of the carrier gas output channel is communicated with the top of the detection chamber.

[0022] Optionally, a plurality of intermediate flow channels are arranged in parallel between a pair of detection chambers.

[0023] Optionally, a first compensation element is installed on a pole of one detection element connected to a power source, and a second compensation element is installed on a pole of another detection element suitable for being electrically connected to a signal output element.

[0024] The technical solution of the present invention has the following advantages:

[0025] 1. The human breath component detection device provided by the present invention comprises: a gas source component, a first sampling component and a second sampling component are installed in parallel at its outlet end; a first chromatographic separation component is connected to the outlet end of the first sampling component, and the outlet end of the first chromatographic separation component is connected to a carbon dioxide detection component; a second chromatographic separation component is connected to the outlet end of the first sampling component in parallel with the first chromatographic separation component, and the outlet end of the second chromatographic separation component is connected to a combustible gas detection component; a third chromatographic separation component is connected to the outlet end of the second sampling component, and the outlet end of the third chromatographic separation component is connected to a photoionization sulfur detection component.

[0026] When using the human breath component detection device to detect the content of human breath components, the gas enters the detection device from the gas source component, and is split through the outlet end of the gas source component. A portion of the gas enters the first injection component, and the remaining portion of the gas enters the second injection component. Part of the gas that enters the first injection component enters the first chromatographic separation component to separate the carbon dioxide gas, and enters the carbon dioxide detection component for content detection; the other part of the gas enters the second chromatographic separation component, performs chromatographic separation on combustible gases such as hydrogen, methane and carbon monoxide, and then enters the combustible gas detection component for content detection. The gas that enters the second injection component is detected by the photoionization sulfur detection component to detect the content of sulfur-containing compounds in the gas. Sulfur-containing compounds are detected by setting up a photoionization sulfur detection element. Photoions and photoelectrons are used to collide with sulfide molecules to ionize them to form ions, which are collected by electrodes and amplified by the back-end circuit to form signals. Microwave ionization is used to excite non-ionized sulfides to release characteristic spectra, which are detected by photodetectors. The electrical and optical signals are processed and superimposed, which can greatly improve the detection ability of sulfide gas molecules. The minimum detection concentration of dimethyl sulfide can reach 0.1ppb.

[0027] 2. The human breath component detection device provided by the present invention, the photoionization sulfur detection part includes: an ionization chamber, an ultraviolet source and a microwave source. The sample gas flows into the ionization chamber through other inlets, and the ultraviolet source directly irradiates ultraviolet light to the ionization chamber to ionize the sulfide gas molecules into ions. A part of the ultraviolet light excites photoelectrons, and the photoelectrons collide with the sulfide gas molecules to form ions. Both states of ions can be collected by electrodes and amplified by the back-end circuit to form signals. A programmable microwave source is set on the ionization chamber to emit microwaves into the ionization chamber. The microwaves give energy to the photoelectrons and the ambient gas to form plasma. In this process, the plasma assists the oxidation reaction of unionized sulfides to form sulfur monoxide, and at the same time, photoelectrons assist in the generation of more ozone molecules. The ozone molecules react with sulfur monoxide to generate excited sulfur dioxide. The excited sulfur dioxide decays to the ground state, releases a characteristic spectrum, and is detected by the photodetector. By adjusting the microwave frequency and power, the selective excitation of sulfides is improved to avoid background interference. It can greatly improve the detection capability of sulfide gas molecules, and the minimum detection concentration of dimethyl sulfide can reach 0.1ppb.

[0028] 3. In the human breath component detection device provided by the present invention, a low-dimensional nanomaterial coating is coated on one side of the light-transmitting glass facing the inner cavity of the ionization chamber. The low-dimensional nanomaterial coating may be a tellurene coating, a graphene coating, a silicon cage coating, etc. Ultraviolet light irradiating the low-dimensional nanomaterial coating can excite more photoelectrons, so that the sulfide gas molecules in the ionization chamber are ionized, thereby improving the detection accuracy of the photoionized sulfur detection element.

[0029] 4. The human breath component detection device provided by the present invention, the combustible gas detection element includes a detection cell body and a carrier gas flow channel. The gas in the carrier gas flow channel chamber passes through a pair of detection chambers. When the components to be measured, such as hydrogen, methane, and carbon monoxide, are brought into the detection chamber in the cell body by the carrier gas, they come into contact with the detection element in the detection chamber and undergo a catalytic oxidation reaction, releasing a large amount of heat, causing the resistance value of the detection element to change, thereby outputting a voltage signal on the bridge signal output element to indicate the concentration of the combustible gas. The forced diffusion structure greatly improves the detection performance of the combustible gas, while avoiding interference from carbon dioxide, water vapor, helium, etc. The minimum detection concentration of carbon monoxide can reach 10ppb.

[0030] 5. In the human breath component detection device provided by the present invention, a first compensation element is installed on one pole of a detection element connected to a power source, and a second compensation element is installed on one pole of another detection element suitable for being electrically connected to a signal output element. The first compensation element and the second compensation element form a four-arm bridge structure with the two detection elements to improve the detection sensitivity and response speed of the combustible gas detection element. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a schematic diagram of a human breath component detection device provided in an embodiment of the present invention.

[0033] Figure 2 It is a schematic structural diagram of a combustible gas detection component provided in an embodiment of the present invention.

[0034] Figure 3 It is a schematic structural diagram of a photoionized sulfur detection element provided in an embodiment of the present invention.

[0035] Explanation of the accompanying drawings: 1. gas source assembly; 2. first sample injection assembly; 3. second sample injection assembly; 4. first chromatographic separation element; 5. second chromatographic separation element; 6. third chromatographic separation element; 7. carbon dioxide detection element; 8. combustible gas detection element; 9. photoionization sulfur detection element; 10. ionization chamber; 11. gas inlet; 12. gas outlet; 13. photoelectric sensor; 14. ultraviolet source; 15. microwave source; 16. light-transmitting glass; 17. detection cell body; 18. detection chamber; 19. detection element; 20. power supply; 21. carrier gas inlet flow channel; 22. intermediate flow channel; 23. carrier gas output flow channel; 24. first compensation element; 25. second compensation element. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0040] Figures 1 to 3 The present embodiment shows a human breath component detection device, including a gas source component 1, a first chromatographic separation component 4, a second chromatographic separation component 5 and a third chromatographic separation component 6. The gas source component 1 can use an air pump or high-pressure nitrogen as a carrier gas to drive the gas exhaled by the human body to move in the human breath component detection device. The first chromatographic separation component 4 is a carbon dioxide gas chromatograph. In the present embodiment, the first chromatographic separation component 4 uses a Haysep A chromatographic filling column. The second chromatographic separation component 5 is a combustible gas chromatographic instrument. In the present embodiment, the second chromatographic separation component 5 uses a TDX-01 chromatographic column to separate hydrogen, methane and carbon monoxide, and the separation cycle does not exceed three minutes. The third chromatographic separation component 6 is a sulfur-containing gas chromatographic instrument, which is used to separate hydrogen sulfide, methyl mercaptan and dimethyl sulfide gases.

[0041] The outlet end of the gas source component 1 is connected in parallel with the first sampling component 2 and the second sampling component 3. The first sampling component 2 and the second sampling component 3 are both pumped by a peristaltic pump, and a six-way valve, an eight-way valve or a ten-way valve is used for automatic sampling, wherein the ten-way valve can be used for gas path backflush. When supplying gas to the second sampling component 3, a 1ml or 2ml medical syringe is used to take gas from the human mouth and input it into the second sampling component 3. The material of the second sampling component 3 is generally polytetrafluoroethylene to avoid adsorption of sulfides.

[0042] The first chromatographic separation element 4 is connected to the outlet of the first sampling assembly 2, and the outlet of the first chromatographic separation element 4 is connected to the carbon dioxide detection element 7. The second chromatographic separation element 5 is connected in parallel with the first chromatographic separation element 4 to the outlet of the first sampling assembly 2, and the outlet of the second chromatographic separation element 5 is connected to the combustible gas detection element 8. The combustible gas detection element 8 includes a detection cell body 17 and a carrier gas flow channel. Figure 2As shown, the detection cell body 17 is provided with a pair of detection chambers 18, and detection elements 19 are installed in the detection chambers 18. The pair of detection elements 19 are arranged in parallel, one pole of the detection element 19 is connected to the power supply 20, and the other pole is suitable for being electrically connected to the signal output element. The carrier gas flow channel is arranged throughout the detection cell body 17, and the carrier gas flow channel is connected to the pair of detection chambers 18 in sequence. Specifically, the carrier gas flow channel includes a carrier gas inlet flow channel 21, an intermediate flow channel 22 and a carrier gas outlet flow channel 23 that are connected in sequence. The carrier gas inlet flow channel 21 connects one of the detection chambers 18 with the outside, and the carrier gas outlet flow channel 23 connects the other detection chamber 18 with the outside. The intermediate flow channel 22 is arranged between the pair of detection chambers 18 to connect the pair of detection chambers 18. In order to allow the gas to fill the entire detection chamber 18 and make the gas fully contact with the detection element 19, the output end of the carrier gas inlet flow channel 21 is connected to the bottom of the detection chamber 18, and the input end of the carrier gas outlet flow channel 23 is connected to the top of the detection chamber 18. A plurality of intermediate flow channels 22 are arranged in parallel between a pair of detection chambers 18. In this embodiment, two intermediate flow channels 22 are arranged in parallel. A first compensation element 24 is installed on one pole of one detection element 19 connected to the power source 20, and a second compensation element 25 is installed on another pole of the detection element 19 suitable for being electrically connected to the signal output element. In this embodiment, the power source 20 is a constant voltage power source or a constant current power source.

[0043] The third chromatographic separation element 6 is connected to the outlet end of the second sample injection assembly 3, and the outlet end of the third chromatographic separation element 6 is connected to the photoionization sulfur detection element 9. Figure 3 As shown, in this embodiment, the photoionization sulfur detection element 9 includes an ionization chamber 10, an ultraviolet source 14 and a microwave source 15. The ionization chamber 10 is provided with a gas inlet 11 and a gas outlet 12, and a photoelectric sensor 13 is installed on the inner wall of the ionization chamber 10, and the photoelectric sensor 13 is arranged near the gas outlet 12. The photoelectric sensor 13 uses a high-sensitivity photoionization sensor, and the minimum detection concentration of dimethyl sulfide can reach 0.1ppb through the optimization of the sensor circuit and structure. The ultraviolet source 14 is arranged toward the inner cavity of the ionization chamber 10, and the ultraviolet source 14 is suitable for emitting ultraviolet rays into the ionization chamber 10 so as to photoionize the particles in the ionization chamber 10. The microwave source 15 is suitable for emitting microwaves into the ionization chamber 10 so as to cause microwave ionization of the particles in the ionization chamber 10. The ultraviolet source 14 is installed upstream of the microwave source 15. A light-transmitting glass 16 is installed on the side wall of the ionization chamber 10, and the ultraviolet source 14 is arranged toward the light-transmitting glass 16. A low-dimensional nanomaterial coating is coated on one surface of the light-transmitting glass 16 facing the inner cavity of the ionization chamber 10.

[0044] The human breath component detection device provided in this embodiment realizes the detection of seven components of hydrogen, methane, carbon monoxide, carbon dioxide, hydrogen sulfide, methyl mercaptan, and dimethyl sulfide in human breath by one device at the same time. On the basis of considering practical applications, when measuring the carbon monoxide concentration, the carbon monoxide in the ambient air and the differences in sampling operations of different people are considered at the same time. The carbon monoxide concentration in the measured sample is calibrated with carbon dioxide and then a certain proportion of background carbon monoxide is deducted. The obtained carbon monoxide concentration is closer to the endogenous carbon monoxide concentration of the human body, and the red blood cell life span calculated by the endogenous carbon monoxide concentration of the human body can better explain the true value of the red blood cell life span of the current test person. Similarly, for the determination of hydrogen, calibration is performed according to the carbon dioxide concentration and the hydrogen concentration in the ambient air, and the obtained hydrogen concentration can better explain the current hydrogen level in the test person, and the symptom diagnosis of the test person is more accurate. The specific calibration works as follows: before analyzing human breath samples, the ambient air is first analyzed to accurately determine the background carbon monoxide and hydrogen concentrations in the ambient air. When analyzing the sample, the concentrations of carbon monoxide and hydrogen in the sample are first calibrated according to the calibrated precise concentration of carbon dioxide gas, and then the background carbon monoxide and hydrogen are subtracted to obtain the corrected carbon monoxide and hydrogen concentrations.

[0045] The combustible gas detection element 8 provided in this embodiment is composed of two detection elements 19 and two compensation elements to form a four-arm bridge. The structure adopts the structure of forced diffusion of the thermal conductivity detector cell body, which solves the problems of the thermal conductivity detector having no selectivity and low sensitivity and the catalytic combustion sensor having slow response and low sensitivity, and greatly improves the detection performance of combustible gas. At the same time, it avoids interference from carbon dioxide, water vapor, helium, etc., and the minimum detection concentration of carbon monoxide can reach 10ppb. During the test, the human exhaled air is driven by the carrier gas from the carrier gas flow channel into the detection chamber 18 in the detection cell body 17. Except for being connected to the carrier gas flow channel, the rest of the detection chamber 18 is sealed. Figure 2 As shown, the right side of the carrier gas flow channel is the inlet, and the left side is the outlet. The detection element 19 containing the precious metal catalyst is encapsulated in the sealed detection chamber 18 on the right side. The carrier gas drives the human exhaled air to flow through the detection element 19. When the components to be tested, such as hydrogen, methane, and carbon monoxide, are brought into the detection chamber 18 by the carrier gas, the components to be tested will contact with the detection element 19 in the detection chamber 18 and undergo catalytic oxidation reaction, releasing a large amount of heat, causing the resistance value of the detection element 19 to change, thereby outputting a voltage signal at the bridge signal output end to indicate the component content of hydrogen, methane, and carbon monoxide.

[0046] The photoionized sulfur detection element 9 provided in this embodiment uses a combination of three principles, namely, photoionization, photoelectron ionization, and microwave plasma ionization excitation, to enhance the gas concentration signal, and can achieve high-sensitivity detection of sulfides under any matrix. The specific workflow is as follows: Figure 3As shown, the sample flows into the ionization chamber 10 through the gas inlet 11 on the left, and the deep ultraviolet light source is injected into the ionization chamber 10 through the light-transmitting glass 16, and the light-transmitting glass 16 is partially coated with low-dimensional nanomaterial coatings such as tellurene, graphene, and silicon cages. A part of the ultraviolet light passes through the light-transmitting glass 16 without the low-dimensional nanomaterial coating, and directly irradiates into the ionization chamber 10, ionizing the sulfide gas molecules into ions; another part of the ultraviolet light irradiates the low-dimensional nanomaterial coating to excite photoelectrons, and the photoelectrons are accelerated by the electric field applied between the photoelectric sensor 13 and the other electrode, and collide with the sulfide gas molecules to ionize to form ions. Ions in both states can be collected by the electrodes and amplified by the back-end circuit to form signals. A microwave generator 15 is installed downstream of the ultraviolet generator 14 on the ionization chamber 10. The microwave generator 15 emits microwaves into the ionization chamber 10 to give energy to photoelectrons and ambient gases to form plasma. In this process, the plasma assists the oxidation reaction of unionized sulfide gas molecules to form sulfur monoxide. At the same time, photoelectrons assist in the generation of more ozone molecules. Ozone molecules react with sulfur monoxide to generate excited sulfur dioxide. The excited sulfur dioxide decays to the ground state, releases a characteristic spectrum, and is captured and detected by the photoelectric sensor 13. The three principles of photoionization, photoelectron ionization, and microwave plasma ionization excitation are combined to enhance the concentration signal of the gas, which greatly improves the detection capability of sulfides. The minimum detection concentration of dimethyl sulfide can reach 0.1ppb.

[0047] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A human breath component detection device, characterized in that: include: An air source component (1) has an outlet end at which a first sample injection component (2) and a second sample injection component (3) are installed in parallel; A first chromatographic separation component (4) is connected to the outlet end of the first sample injection component (2), and the outlet end of the first chromatographic separation component (4) is connected to a carbon dioxide detection component (7); A second chromatographic separation element (5) is connected in parallel with the first chromatographic separation element (4) at the outlet of the first injection assembly (2), and the outlet of the second chromatographic separation element (5) is connected to a combustible gas detection element (8); A third chromatographic separation element (6) is connected to the outlet end of the second sample injection assembly (3), and the outlet end of the third chromatographic separation element (6) is connected to a photoionized sulfur detection element (9); The photoionized sulfur detection element (9) comprises: An ionization chamber (10) is provided with a gas inlet (11) and a gas outlet (12), a photoelectric sensor (13) is installed on the inner wall of the ionization chamber (10), and the photoelectric sensor (13) is arranged close to the gas outlet (12); An ultraviolet light source (14) is disposed toward the inner cavity of the ionization chamber (10), and the ultraviolet light source (14) is suitable for emitting ultraviolet light into the ionization chamber (10) so as to photoionize particles in the ionization chamber (10); A microwave generating source (15) is suitable for emitting microwaves into the ionization chamber (10) so as to cause microwave ionization of particles in the ionization chamber (10).

2. The human breath component detection device according to claim 1, characterized in that: The ultraviolet source (14) is installed upstream of the microwave source (15).

3. The human breath component detection device according to claim 1 or 2, characterized in that: A light-transmitting glass (16) is installed on the side wall of the ionization chamber (10), and the ultraviolet generating source (14) is arranged toward the light-transmitting glass (16).

4. The human breath component detection device according to claim 3, characterized in that: A low-dimensional nano material coating is coated on one surface of the light-transmitting glass (16) facing the inner cavity of the ionization chamber (10).

5. The human breath component detection device according to claim 1 or 2, characterized in that: The combustible gas detection element (8) comprises: A detection cell body (17) is provided with a pair of detection chambers (18) therein, wherein a detection element (19) is installed in each of the detection chambers (18), the pair of detection elements (19) are arranged in parallel, one pole of the detection element (19) is connected to a power source (20), and the other pole is suitable for being electrically connected to a signal output element; A carrier gas flow channel is provided through the detection cell body (17), and the carrier gas flow channel is connected to a pair of detection chambers (18) in sequence.

6. The human breath component detection device according to claim 5, characterized in that: The carrier gas flow channel comprises a carrier gas inlet channel (21), an intermediate channel (22) and a carrier gas output channel (23) which are connected in sequence. The carrier gas inlet channel (21) connects one of the detection chambers (18) with the outside, the carrier gas output channel (23) connects the other detection chamber (18) with the outside, and the intermediate channel (22) is arranged between a pair of the detection chambers (18) to connect the pair of the detection chambers (18).

7. The human breath component detection device according to claim 6, characterized in that: The output end of the carrier gas inlet channel (21) is in communication with the bottom of the detection chamber (18), and the input end of the carrier gas output channel (23) is in communication with the top of the detection chamber (18).

8. The human breath component detection device according to claim 6 or 7, characterized in that: A plurality of the intermediate flow channels (22) are arranged in parallel between a pair of the detection chambers (18).

9. The human breath component detection device according to claim 5, characterized in that: A first compensation element (24) is installed on one pole of one of the detection elements (19) connected to the power source (20), and a second compensation element (25) is installed on another pole of the detection element (19) suitable for being electrically connected to the signal output element.

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