Expiration collection device

Abstract

The invention relates to the technical field of medical instruments, in particular to an exhaled air collecting device which comprises a box body, a collecting mechanism is arranged in the box body, and the collecting mechanism can help unconscious people to collect exhaled air; and the collecting mechanism is connected with a recyclable gas collecting device. According to the expiration collection device, when expiration collection is carried out on a patient, different collection methods are provided for different crowds, an autonomous collection method can be used for crowds with autonomous consciousness, full-automatic collection can be achieved for children or patients without autonomous consciousness through the device, an automatic control panel is used, and the automatic collection process is achieved; the flow velocity of the pipeline can be monitored in real time, the flow velocity of gas in the pipeline can be accurately controlled, different standard flow velocity ranges are set according to different types of patients, accurate adjustment is achieved through an algorithm, and the collection accuracy and adaptability are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical appliances, in particular to an exhaled breath collection device. Background Art

[0002] The potential of exhaled breath sampling and analysis has long attracted interest in the fields of medical diagnostics and disease monitoring. This interest is attributed to its non-invasive nature, access to an unlimited supply of samples (i.e., breath), and the potential to facilitate rapid patient diagnosis.

[0003] However, in order to monitor diseases in medicine, a collection device that can more conveniently collect the exhaled breath of unconscious people is needed. In addition, in the existing technology, mixed exhalation can be considered the simplest type of breath that can be obtained, because it includes all stages of obtaining exhaled gas, including chest air and alveolar gas; the collection steps are mixed exhalation collection, breathing through a mask, exhaling into a polymer bag, holding the inhalation for 5 seconds, and exhaling completely; this has certain disadvantages. In medical diagnosis, chest air cannot be used as a diagnostic standard, only alveolar gas has a diagnostic standard. Therefore, this device has one more step of diversion and gas collection process than ordinary exhalation collection devices, which distinguishes chest air from alveolar gas, and the steps become cumbersome. In addition, in the existing technology, disposable air bags are often used to collect gas, which causes waste, so it needs to be improved. Summary of the Invention

[0004] The purpose of the present invention is to provide an exhaled breath collection device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a breath collection device, comprising a box body, wherein a collection mechanism is provided inside the box body, and the collection mechanism can help unconscious people to collect breath;

[0006] The collection mechanism is connected to a recyclable gas collection device.

[0007] Preferably, the collection mechanism includes:

[0008] An automation control panel, which includes a data processing unit and a control execution unit. The data processing unit is used to receive electrical signals from sensors, and after pre-processing such as amplification and filtering, analyze and process the flow rate data according to a preset algorithm, calculate the current actual flow rate value, compare it with the set standard flow rate range, and generate corresponding control instructions to send to the control execution unit. The control execution unit adjusts relevant components in the device according to the control instructions sent by the data processing unit to achieve precise control of the gas flow rate in the pipeline;

[0009] The main air pipe runs through both ends of the box body, the front end of the main air pipe is connected to the exhalation mask, the rear end of the main air pipe is connected to the connecting seat, the gas collecting device is connected to the connecting seat, and a flow control unit is provided at the front end of the main air pipe located inside the box body. It is installed at a key position of the pipeline for exhalation collection to monitor the flow rate of the gas in the pipeline in real time. The flow sensor inside it can accurately measure the volume of gas passing through the cross-section of the pipeline per unit time, convert the flow rate information into an electrical signal and transmit it to the data processing unit. The main air pipe is connected to an exhaust pipe and a side pipe. The exhaust pipe is connected to the back of the flow control unit and the outlet end passes through the side wall of the box body. The side pipe is an L-shaped structure, and one end of the side pipe is connected to the exhaust pipe. A first solenoid valve is provided on the main air pipe between the connection between the exhaust pipe and the side pipe, and an air supply pump and a second solenoid valve are provided on the exhaust pipe. The air supply pump is located between the main air pipe and the side pipe, and the second solenoid valve is located between the side pipe and the side wall of the box body. A third solenoid valve is provided on the side pipe.

[0010] Preferably, the exhalation mask is used to cover the user's mouth for exhalation, and a temperature sensor is provided inside the exhalation mask to measure the temperature difference around the mouth or around the nostrils when the person exhales and inhales, and to sense the exhalation and inhalation process of unconscious patients or unconscious people.

[0011] Preferably, the automatic control panel controls the gas flow rate in the device according to an automatic flow rate control algorithm, and the steps are as follows:

[0012] S1: Set the standard flow rate range. Different standard flow rate ranges are set for different types of patients (children, adults and the elderly). The standard flow rate range for children is [V c-min , V c-max ], the standard flow rate range for adults is [V a-min , V a-max ], the standard flow rate range for the elderly is [V o-min , V o-max ];

[0013] S2: Controlled by the following algorithm:

[0014] Determine the patient type T, when T is a child:

[0015] When V <V c-min When the control execution unit is based on the formula ΔP=k1(V c-min -V) calculates the required increase in the air supply pump pressure increment ΔP (where k1 is the proportional coefficient related to the air supply pump characteristics), and then controls the air supply pump to increase the corresponding pressure to increase the gas flow rate in the pipeline; when V>V c-max When the control execution unit is based on the formula ΔP′=k2(VV c-max) Calculate the required reduction in the air supply pump pressure ΔP′ (where k2 is a proportional coefficient related to the air supply pump characteristics), control the air supply pump to reduce the corresponding pressure, and reduce the gas flow rate in the pipeline;

[0016] When T is an adult:

[0017] When V <V a-min According to the formula ΔP=k3(V a-min -V) calculates the pressure increment of the air supply pump (k3 is the relevant proportional coefficient) and controls the air supply pump to increase the pressure; when V>V a-max When ΔP′=k4(VV a-max ) Calculate the pressure reduction of the air supply pump (k4 is the relevant proportional coefficient) and control the pressure reduction of the air supply pump;

[0018] When T is elderly:

[0019] When V <V o-min When using the formula ΔP=k5(V o-min -V) calculates the pressure increment of the air supply pump (k5 is the relevant proportional coefficient) and controls the air supply pump to increase the pressure; when V>V o-max When ΔP′=k6(VV o-max ) Calculate the pressure reduction of the air supply pump (k6 is the relevant proportional coefficient) and control the air supply pump to reduce the pressure.

[0020] Preferably, the gas collecting device includes a gas collecting box, which is a hollow structure. A docking joint is provided at the front end of the gas collecting box, and the docking joint is used to be plugged into the connecting seat (a magnetic piece is provided on the inner end side wall of the connecting seat, and the magnetic piece sucks the end of the docking joint into the connecting seat to ensure stable installation). An air inlet is opened in the docking joint. When the docking joint is plugged into the connecting seat, the air inlet connects the main air pipe and the interior of the gas collecting box.

[0021] A sealing assembly is provided inside the docking joint, which is used to automatically adjust the opening and closing state of the air inlet. When the docking joint and the connecting seat are docked, the sealing assembly opens the air inlet, and when the docking joint and the connecting seat are separated, the sealing assembly closes the air inlet.

[0022] Preferably, the blocking assembly includes an inner slider located on both sides of the air inlet, the inner slider is slidably arranged inside the docking head, one end of the inner slider is connected to a return spring, and the two side walls of the inner slider are respectively provided with a pushing block and a second rack, the pushing block extends from the side wall of the docking head, and a rotating shaft is rotatably installed next to the inner slider, a lower gear and an upper gear are provided on the rotating shaft, the lower gear is meshed with the second rack, two sealing plates are slidably arranged on both sides of the air inlet, a third rack is embedded in the sealing plate, the third rack is meshed with the upper gear, the two sealing plates close the air inlet when they are merged, and the air inlet is opened when the two sealing plates are separated.

[0023] Preferably, an inner groove is provided on each inner wall on both sides of the connecting seat, the inner groove corresponds to the pushing block, and a block block is movably provided at the end of the inner groove. A connecting frame is connected to the bottom surface of each block block, and a tensioning spring is connected to the end of the connecting frame. A first rack is provided on the opposite surfaces of the two connecting frames, and a torsion column is rotatably installed at the bottom of the connecting seat. The upper end of the torsion column is connected to a center gear. The center gear is located between the two connecting frames and is meshed with the first racks on both sides.

[0024] Preferably, a piston head is movably provided inside the air collecting box, a cavity is provided inside the piston head, a front water outlet connected to the cavity is provided on the front of the piston head, a center groove is provided on the side wall of the piston head, an overflow hole is provided between the cavity and the center groove, a rear water outlet is provided between the center groove and the back of the piston head, a connecting pipe column is rotatably installed on the back of the piston head, the connecting pipe column is a hollow structure, a water outlet is provided on the side wall of the connecting pipe column inserted into the cavity, and a sealing block is provided at the end of the connecting pipe column.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The exhaled breath collection device proposed in the present invention utilizes different collection methods for different patient populations. Conscious individuals can use the autonomous collection method, while unconscious children or patients can achieve fully automated collection. Using an automated control panel, the collection process is automated. Pipeline flow velocity detection enables real-time monitoring and precise control of gas flow within the pipeline. Different standard flow rate ranges are set for different patient types, and precise adjustment is achieved through an algorithm, improving collection accuracy and adaptability. Furthermore, the main airway, first solenoid valve, exhaust pipe, air supply pump, second solenoid valve, side pipe, and third solenoid valve work together to separate alveolar gas and thoracic air, collecting only alveolar gas. Furthermore, the device includes a recyclable gas collection device that can be reused multiple times, saving costs and facilitating easy docking and cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the structure of the device of the present invention.

[0028] Figure 2 This is a schematic structural diagram of the device of the present invention from another perspective.

[0029] Figure 3 It is a schematic diagram of the structure of the collection mechanism of the present invention.

[0030] Figure 4 It is a schematic diagram of the box structure of the present invention.

[0031] Figure 5This is a structural schematic diagram of the connecting seat of the present invention.

[0032] Figure 6 This is a schematic diagram of the connection structure of the barrier block of the present invention.

[0033] Figure 7 This is a structural schematic diagram of the connecting seat of the present invention.

[0034] Figure 8 It is a schematic diagram of the joint structure of the present invention.

[0035] Figure 9 It is a schematic structural diagram of the blocking component of the present invention.

[0036] Figure 10 This is a schematic diagram of the piston head structure of the present invention.

[0037] Figure 11 This is a schematic diagram of the connecting pipe column structure of the present invention.

[0038] In the figure: box body 1, automation control board 2, main air pipe 3, flow control unit 4, first solenoid valve 5, exhaust pipe 6, air supply pump 7, second solenoid valve 8, side pipe 9, third solenoid valve 10, exhalation mask 11, connecting seat 12, gas collecting box 13, docking joint 14, air inlet 15, inner groove 16, block 17, connecting frame 18, first rack 19, tensioning spring 20, torsion column 21, center gear 22, push block 23, inner slider 24, second rack 2401, return spring 25, rotating shaft 26, lower gear 27, upper gear 28, sealing plate 29, third rack 30, piston head 31, connecting pipe column 32, water outlet 33, blocking block 34, center groove 35, overflow hole 36, rear water outlet 37, front water outlet 38. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention 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 making creative efforts are within the scope of protection of the present invention.

[0040] See also Figures 1 to 11 The present invention provides a technical solution: a breath collection device, comprising a box body 1, a display screen provided on the side wall of the box body 1, and a collection mechanism provided inside the box body 1, which can help unconscious people to collect breath; the collection mechanism includes:

[0041] The automation control board 2 includes a data processing unit and a control execution unit. The data processing unit is used to receive the electrical signal from the sensor, and after pre-processing such as amplification and filtering, analyze and process the flow rate data according to a preset algorithm, calculate the current actual flow rate value, compare it with the set standard flow rate range, generate corresponding control instructions and send them to the control execution unit; the control execution unit adjusts the relevant components in the device according to the control instructions sent by the data processing unit to achieve precise control of the gas flow rate in the pipeline;

[0042] The main air pipe 3 runs through both ends of the box body 1. The front end of the main air pipe 3 is connected to the exhalation mask 11, and the rear end of the main air pipe 3 is connected to the connection seat 12. The gas collecting device is connected to the connection seat 12. A flow control unit 4 is provided at the front end of the main air pipe 3 located inside the box body 1. It is installed at a key position of the exhalation collection pipeline to monitor the flow rate of the gas in the pipeline in real time. The flow sensor inside it can accurately measure the volume of gas passing through the cross section of the pipeline per unit time, convert the flow rate information into an electrical signal and transmit it to the data processing unit. The main air pipe 3 is connected to the exhaust pipe 6 and the side pipe 9. The exhaust pipe 6 is connected to the back of the flow control unit 4 and the outlet end passes through the side wall of the box body 1. The side pipe 9 is an L-shaped structure. One end of the side pipe 9 is connected to the exhaust pipe 6. A first solenoid valve 5 is provided on the main air pipe 3 between the connection between the exhaust pipe 6 and the side pipe 9. An air supply pump 7 and a second solenoid valve 8 are provided on the exhaust pipe 6. The air supply pump 7 is located between the main air pipe 3 and the side pipe 9. The second solenoid valve 8 is located between the side pipe 9 and the side wall of the box body 1. A third solenoid valve 10 is provided on the side pipe 9.

[0043] The exhalation mask 11 is used to cover the user's mouth for exhalation. A temperature sensor is provided inside the exhalation mask 11 to measure the temperature difference around the mouth or around the nostrils when the person exhales and inhales, and to sense the exhalation and inhalation process of unconscious patients or unconscious people.

[0044] The automation control panel 2 controls the gas flow rate in the device according to the flow rate automatic control algorithm, and the steps are as follows:

[0045] S1: Set the standard flow rate range. Different standard flow rate ranges are set for different types of patients (children, adults and the elderly). The standard flow rate range for children is [V c-min , V c-max ], the standard flow rate range for adults is [V a-min , V a-max ], the standard flow rate range for the elderly is [V o-min , V o-max ];

[0046] S2: Controlled by the following algorithm:

[0047] Determine the patient type T, when T is a child:

[0048] When V <V c-min When the control execution unit is based on the formula ΔP=k1(V c-min -V) calculate the pressure increment ΔP of the air supply pump 7 that needs to be increased (where k1 为 The proportional coefficient related to the characteristics of the air supply pump 7 is then controlled to increase the corresponding pressure to increase the gas flow rate in the pipeline; when V>V c-max When the control execution unit is based on the formula ΔP′=k2(VV c-max ) Calculate the pressure reduction ΔP′ of the air supply pump 7 that needs to be reduced (where k2 is a proportional coefficient related to the characteristics of the air supply pump 7), control the air supply pump 7 to reduce the corresponding pressure, and reduce the gas flow rate in the pipeline;

[0049] When T is an adult:

[0050] When V <V a-min According to the formula ΔP=k3(V a-min -V) calculates the pressure increment of the air supply pump 7 (k3 is the relevant proportional coefficient) and controls the air supply pump 7 to increase the pressure; when V>V a-max When ΔP′=k4(VV a-max ) Calculate the pressure reduction of the air supply pump 7 (k4 is the relevant proportional coefficient) and control the air supply pump 7 to reduce pressure;

[0051] When T is elderly:

[0052] When V <V o-min When using the formula ΔP=k5(V o-min -V) calculates the pressure increment of the air supply pump 7 (k5 is the relevant proportional coefficient), and controls the air supply pump 7 to increase the pressure; when V>V o-max When ΔP′=k6(VV o-max ) Calculate the pressure reduction of the air supply pump 7 (k6 is the relevant proportional coefficient) and control the air supply pump 7 to reduce the pressure.

[0053] During the collection process, for those who are conscious and capable of exhaled breath collection, a nozzle can be used directly. The collector simply needs to align their mouth with the nozzle and blow into it. For critically ill patients who are unconscious or involuntarily, young children, or patients with Alzheimer's disease, a suitably sized exhalation mask 11 can be worn. Because the temperature around the mouth or nostrils differs when a person exhales and inhales, a temperature sensor is installed on the mask to sense the exhalation and inhalation processes of the unconscious patient or child. Once the sensor detects the patient or child exhaling, the automated control panel runs a program to complete the exhaled breath collection process. Once the program starts, when exhaled air flows through the flow control unit 4 on the main airway 3, if the airflow rate is less than the set program flow rate, the air supply pump 7 increases its power to help the patient or child complete exhalation. Simultaneously, the pipeline flow rate detection system monitors the flow rate in real time and adjusts the air supply pump 7 and other components according to the aforementioned algorithm to ensure that the flow rate is within the standard range for the corresponding patient type.

[0054] Gas collection consists of two steps:

[0055] 1. After the air supply pump 7 is turned on, the first solenoid valve 5 and the second solenoid valve 8 are opened, and the third solenoid valve 10 is closed, and the patient's front exhaled air is emptied along the exhaust pipe 6; 2. After the front exhaled air is emptied, 5) and the second solenoid valve 8 are closed, and the third solenoid valve 10 is opened, and the alveolar gas is collected along the main trachea 3.

[0056] The collection mechanism is connected to a recyclable gas collecting device, which includes a gas collecting box 13. The gas collecting box 13 is a hollow structure. A docking joint 14 is provided at the front end of the gas collecting box 13. The docking joint 14 is used to be plugged into the connecting seat 12 (a magnetic piece is provided on the inner end side wall of the connecting seat 12, and the magnetic piece sucks the end of the docking joint 14 into the connecting seat 12 for stable installation). An air inlet 15 is opened in the docking joint 14. When the docking joint 14 is plugged into the connecting seat 12, the air inlet 15 connects the main air pipe 3 and the interior of the gas collecting box 13;

[0057] A sealing component is provided inside the docking joint 14, which is used to automatically adjust the opening and closing state of the air inlet 15. When the docking joint 14 and the connecting seat 12 are docked, the sealing component opens the air inlet 15, and when the docking joint 14 and the connecting seat 12 are separated, the sealing component closes the air inlet 15. The blocking assembly includes an inner slider 24 located on both sides of the air inlet 15, the inner slider 24 is slidably arranged inside the docking head 14, one end of the inner slider 24 is connected to a return spring 25, and the two side walls of the inner slider 24 are respectively provided with a pushing block 23 and a second rack 2401, the pushing block 23 extends from the side wall of the docking head 14, and a rotating shaft 26 is rotatably installed next to the inner slider 24, and a lower gear 27 and an upper gear 28 are provided on the rotating shaft 26, and the lower gear 27 is meshed with the second rack 2401. Two sealing plates 29 are slidably arranged on both sides of the air inlet 15, and a third rack 30 is embedded in the sealing plate 29. The third rack 30 is meshed with the upper gear 28. When the two sealing plates 29 are merged, the air inlet 15 is closed, and when the two sealing plates 29 are separated, the air inlet 15 is opened.

[0058] An inner groove 16 is provided on the inner walls on both sides of the connecting seat 12, and the inner groove 16 corresponds to the push block 23. A block 17 is movably provided at the end of the inner groove 16. A connecting frame 18 is connected to the bottom surface of each block 17, and a tensioning spring 20 is connected to the end of the connecting frame 18. A first rack 19 is provided on the opposite surfaces of the two connecting frames 18. A torsion column 21 is rotatably installed at the bottom of the connecting seat 12, and the upper end of the torsion column 21 is connected to a center gear 22. The center gear 22 is located between the two connecting frames 18 and is meshed with the first racks 19 on both sides.

[0059] When the gas collecting device is docked and installed, the docking joint 14 is correspondingly inserted into the connecting seat 12, the end of the docking joint 14 is sucked, and when the docking joint 14 is inserted, the push block 23 enters from the inner groove 16, and the blocking block 17 blocks the push block 23. At this time, the push block 23 pushes the inner slider 24 to move, the return spring 25 is compressed, and the lower gear 27 drives the upper gear 28 to rotate. The upper gear 28 and the third rack 30 are engaged and connected to push the sealing plate 29 toward both sides. The two sealing plates 29 are separated to open the air inlet 15, so that the gas can be collected; when the gas is collected, the torsion column 21 is rotated. The central gear 22 drives the connecting frame 18, and the blocking blocks 17 on both sides move outward. The blocking blocks 17 do not block the pushing blocks 23. The inner slider 24 can be moved back under the elastic force of the return spring 25, so that the two sealing plates 29 are merged and docked to block the air inlet 15, so that the gas in the gas collecting box 13 will not overflow, and then the docking head 14 can be pulled out from the connecting seat 12.

[0060] A piston head 31 is movably provided inside the gas collecting box 13. When gas is filled into the gas collecting box 13, the piston head 31 will be pushed to move backward. A cavity is provided inside the piston head 31, and a front water outlet 38 connected to the cavity is provided on the front of the piston head 31. A central groove 35 is provided on the side wall of the piston head 31, an overflow hole 36 is provided between the cavity and the central groove 35, and a rear water outlet 37 is provided between the central groove 35 and the back of the piston head 31. A connecting pipe column 32 is rotatably installed on the back of the piston head 31. The connecting pipe column 32 is a hollow structure, and a water outlet 33 is provided on the side wall of the connecting pipe column 32 inserted into the cavity, and a sealing block 34 is provided at the end of the connecting pipe column 32. When collecting gas, the sealing block 34 blocks the front water outlet 38 to prevent gas leakage. When the gas detection in the gas collecting box 13 is completed, the inside of the gas collecting box 13 can be cleaned. Use the pipe and the tail end of the connecting pipe column 32 to connect and inject cleaning liquid into the inside. The cleaning liquid enters the cavity from the water outlet 33, and then enters the center groove 35 from the overflow hole 36 to clean the inner wall of the gas collecting box 13. Rotate the connecting pipe column 32 so that the blocking block 34 and the front water outlet 38 are staggered. The cleaning liquid flows out from then on to clean and disinfect the front end of the piston head 31 and the head of the gas collecting box 13. During cleaning, the connecting pipe column 32 can be pulled back and forth to improve the cleaning effect, and the push block 23 can be toggled to open the air inlet 15, making cleaning more convenient and thorough.

[0061] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An exhaled breath collection device, comprising a box body, characterized in that: The box body is provided with a collection mechanism inside, which can help unconscious people to collect exhaled breath; The collection mechanism is connected to a recyclable gas collection device.

2. The breath collection device according to claim 1, characterized in that: The collection mechanism includes: An automation control panel, which includes a data processing unit and a control execution unit. The data processing unit is used to receive electrical signals from sensors, perform pre-processing, analyze and process flow rate data according to a preset algorithm, calculate the current actual flow rate value, compare it with a set standard flow rate range, and generate corresponding control instructions to send to the control execution unit. The control execution unit adjusts relevant components within the device according to the control instructions sent by the data processing unit to achieve precise control of the gas flow rate in the pipeline; The main air pipe runs through both ends of the box body, the front end of the main air pipe is connected to the exhalation mask, the rear end of the main air pipe is connected to the connecting seat, the air collecting device is connected to the connecting seat, and a flow control unit is provided at the front end of the main air pipe located inside the box body. The main air pipe is connected to the exhaust pipe and the side pipe, the exhaust pipe is connected to the back of the flow control unit and the outlet end passes through the side wall of the box body, the side pipe is an L-shaped structure, one end of the side pipe is connected to the exhaust pipe, and a first solenoid valve is provided on the main air pipe between the connection between the exhaust pipe and the side pipe, an air supply pump and a second solenoid valve are provided on the exhaust pipe, the air supply pump is located between the main air pipe and the side pipe, the second solenoid valve is located between the side pipe and the side wall of the box body, and a third solenoid valve is provided on the side pipe.

3. The breath collection device according to claim 2, characterized in that: The exhalation mask is used to cover the user's mouth for exhalation. A temperature sensor is provided inside the exhalation mask for measuring the temperature difference around the mouth or around the nostrils when the person exhales and inhales, and sensing the exhalation and inhalation process of unconscious patients or unconscious people.

4. The breath collection device according to claim 2, characterized in that: The automatic control panel controls the gas flow rate in the device according to the automatic flow rate control algorithm, and the steps are as follows: S1: Set the standard flow rate range. Different standard flow rate ranges are set for different types of patients. The standard flow rate range for children is [V c-min , V c-max ], the standard flow rate range for adults is [V a-min , V a-max ], the standard flow rate range for the elderly is [V o-min , V o-max ]; S2: Controlled by the following algorithm: Determine the patient type T, when T is a child: When V <V c-min When the control execution unit is based on the formula ΔP=k1(V c-min -V) calculates the required increase in the air supply pump pressure increment ΔP, and then controls the air supply pump to increase the corresponding pressure to increase the gas flow rate in the pipeline; when V>V c-max When the control execution unit is based on the formula ΔP′=k2(VV c-max ) Calculate the pressure reduction ΔP′ of the air supply pump that needs to be reduced, control the air supply pump to reduce the corresponding pressure, and reduce the gas flow rate in the pipeline; When T is an adult: When V <V a-min According to the formula ΔP=k3(V a-min -V) calculate the pressure increment of the air supply pump and control the air supply pump to pressurize; when V>V a-max When ΔP′=k4(VV a-max ) Calculate the pressure reduction of the air supply pump and control the pressure reduction of the air supply pump; When T is elderly: When V <V o-min When using the formula ΔP=k5(V o-min -V) calculates the pressure increment of the air supply pump and controls the air supply pump to increase the pressure; when V>V o-max When ΔP′=k6(VV o-max ) Calculate the pressure reduction of the air supply pump and control the air supply pump to reduce the pressure.

5. The breath sampling device according to claim 1, characterized in that: The gas collecting device includes a gas collecting box, which is a hollow structure. A docking head is provided at the front end of the gas collecting box. The docking head is used to be plugged into the connecting seat. An air inlet is opened in the docking head. When the docking head is plugged into the connecting seat, the air inlet connects the main air pipe and the interior of the gas collecting box. A sealing assembly is provided inside the docking joint, which is used to automatically adjust the opening and closing state of the air inlet. When the docking joint and the connecting seat are docked, the sealing assembly opens the air inlet, and when the docking joint and the connecting seat are separated, the sealing assembly closes the air inlet.

6. The breath sampling device according to claim 5, characterized in that: The blocking assembly includes an inner slider located on both sides of the air inlet, the inner slider is slidably arranged inside the docking head, one end of the inner slider is connected to a return spring, and the two side walls of the inner slider are respectively provided with a pushing block and a second rack, the pushing block extends from the side wall of the docking head, and a rotating shaft is rotatably installed next to the inner slider, a lower gear and an upper gear are provided on the rotating shaft, the lower gear is meshed with the second rack, two sealing plates are slidably arranged on both sides of the air inlet, a third rack is embedded in the sealing plate, the third rack is meshed with the upper gear, the two sealing plates are merged to close the air inlet, and the two sealing plates are separated to open the air inlet.

7. The breath collection device according to claim 2, characterized in that: An inner groove is provided on each inner wall on both sides of the connecting seat, and the inner groove corresponds to the pushing block. A block block is movably provided at the end of the inner groove. A connecting frame is connected to the bottom surface of each block block, and a tensioning spring is connected to the end of the connecting frame. A first rack is provided on the opposite surfaces of the two connecting frames. A torsion column is rotatably installed at the bottom of the connecting seat, and the upper end of the torsion column is connected to a central gear. The central gear is located between the two connecting frames and is meshed with the first racks on both sides.

8. The breath collection device according to claim 5, characterized in that: A piston head is movably provided inside the air collecting box, a cavity is provided inside the piston head, a front water outlet connected to the cavity is provided on the front of the piston head, a center groove is provided on the side wall of the piston head, an overflow hole is provided between the cavity and the center groove, a rear water outlet is provided between the center groove and the back of the piston head, a connecting pipe column is rotatably installed on the back of the piston head, the connecting pipe column is a hollow structure, a water outlet is provided on the side wall of the connecting pipe column inserted into the cavity, and a sealing block is provided at the end of the connecting pipe column.

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