CN211534525U

CN211534525U - Exhaled air condensate collecting device

Info

Publication number: CN211534525U
Application number: CN201921777887.XU
Authority: CN
Inventors: 阳卫超
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-22
Filing date: 2019-10-22
Publication date: 2020-09-22
Anticipated expiration: 2029-10-22

Abstract

The utility model relates to an expiratory gas condensate collection device, including expiratory tube, condenser pipe and liquid collector. The air inlet is arranged on the expiration pipe, the condensation pipe and the expiration pipe are arranged in an embedded mode, and the condensation pipe is used for providing a low-temperature environment. The liquid collector is connected with the expiratory tube and is used for collecting the expiratory gas condensate in the expiratory tube. When the cold air breathing device is used, air is blown into the expiration pipe through the air inlet, and the air in the expiration pipe is cooled to become the expired air condensate because the condensation pipe provides a low-temperature environment for the expiration pipe. The exhaled breath condensate slips off the wall of the exhalation tube and drips into the liquid collector, thus completing the collection of exhaled breath condensate. The expiratory gas condensate collecting device comprises an expiratory pipe, a condenser pipe and a liquid collector, and is simple in structure, small in size, free of limitation of a collecting place, easy to operate and convenient to use.

Description

Exhaled air condensate collecting device

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to an expiratory air condensate collection device.

Background

Exhaled Breath Condensate (EBC) contains a variety of components, including, for example, small molecules, proteins, nucleic acids, etc. By measuring the presence or amount of these components in the exhaled breath condensate of the user, disease diagnosis and other physical information can be provided. For example, the changes of certain components in the exhaled breath condensate can reflect pathophysiological states in lung and airway, and is expected to become a means for screening early lung cancer, monitoring disease conditions and judging curative effect of part of people. Under the general condition, the collection of the exhaled breath condensate is carried out in a laboratory, the volume of the traditional exhaled breath condensate collecting device is large, the collection place of the exhaled breath condensate is limited, and the use is inconvenient.

SUMMERY OF THE UTILITY MODEL

Therefore, the exhaled breath condensate collecting device is simple in structure, small in size, easy to operate and convenient to use.

An exhaled breath condensate collection device comprising:

the air inlet is arranged on the air outlet pipe;

the condensation pipe and the expiration pipe are arranged in an embedded mode and used for providing a low-temperature environment;

the liquid collector is arranged with the expiratory tube and is used for collecting expiratory condensate in the expiratory tube.

The exhaled breath condensate collecting device has at least the following advantages:

according to the exhaled air condensate collecting device, the exhaling pipe and the condensing pipe are arranged in an embedded mode, and the liquid collector is connected with the exhaling pipe. When the cold air breathing device is used, air is blown into the expiration pipe through the air inlet, and the air in the expiration pipe is cooled to become the expired air condensate because the condensation pipe provides a low-temperature environment for the expiration pipe. The exhaled breath condensate slips off the tube wall and drips into the liquid collector, thus completing the collection of exhaled breath condensate. The expiratory gas condensate collecting device comprises an expiratory pipe, a condenser pipe and a liquid collector, and has the advantages of simple structure and small volume; the exhaled gas condensate collecting device is not limited by the collecting place, is easy to operate and is convenient to use.

In one embodiment, the exhaled breath condensate collection device further comprises a blow-off mouthpiece, the blow-off mouthpiece being disposed at the air inlet.

In one embodiment, an air outlet is arranged at the top end of the expiration pipe, a liquid inlet is arranged at the bottom end of the expiration pipe, the liquid collector is connected to the bottom end of the expiration pipe, and the expiration pipe is communicated with the liquid collector.

In one embodiment, the exhalation tube is a cone-shaped structure, and the size of the air outlet of the exhalation tube is smaller than the size of the liquid inlet of the exhalation tube.

In one embodiment, the air inlet is arranged at the bottom of the exhalation tube.

In one embodiment, the condensation pipe is sleeved outside the expiration pipe, and a support part for supporting the condensation pipe is arranged on the expiration pipe; or the expiration pipe is sleeved outside the condensation pipe.

In one embodiment, the condensation pipe is a hollow structure, and an accommodating cavity for accommodating a condensing agent is arranged in the condensation pipe; or the condensation pipe is of a solid structure.

In one embodiment, the exhalation tube is removably coupled to the liquid collector.

In one embodiment, the bottom end of the expiration pipe is provided with an external thread, the liquid collector is provided with an internal thread, and the expiration pipe is in threaded connection with the liquid collector; or the bottom end of the expiration pipe is provided with an internal thread, the liquid collector is provided with an external thread, and the expiration pipe is in threaded connection with the liquid collector.

In one embodiment, the liquid collector is transparent or semitransparent, and scales are arranged on the liquid collector.

Drawings

Fig. 1 is a schematic structural view of an exhaled breath condensate collecting device according to an embodiment of the present invention;

fig. 2 is a schematic structural view of an exhalation tube in the exhaled breath condensate collecting device according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a condenser tube in an exhaled breath condensate collecting apparatus according to an embodiment of the present invention.

Description of reference numerals:

10. the air inlet pipe comprises an air outlet pipe 11, an air inlet 12, an air outlet 13, a liquid inlet 14, a supporting piece 15, an inserting pipe 20, a condensation pipe 21, a first pipe wall 22, a second pipe wall 23, an accommodating cavity 24, a first sealing cover 30, a liquid collector 40 and an air blowing seam.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many different forms other than those specifically described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention, and it is therefore not to be limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

Referring to fig. 1 to 3, an embodiment of an exhaled breath condensate collecting apparatus includes an exhaling pipe 10, a condensing pipe 20, and a liquid collector 30. The air inlet 11 is arranged on the exhaling pipe 10, the exhaling pipe 10 and the condensing pipe 20 are arranged in an embedded mode, and the condensing pipe 20 is used for providing a low-temperature environment. The liquid collector 30 is connected to the exhalation tube 10, and the liquid collector 30 is used for collecting exhaled breath condensate in the exhalation tube 10.

In the exhaled breath condensate collecting device, the exhaling pipe 10 and the condensing pipe 20 are embedded, and the liquid collector 30 is connected to the exhaling pipe 10. When the air-cooling type exhalation tube is used, air is blown into the exhalation tube 10 through the air inlet 11, and the exhaled air in the exhalation tube 10 is directly liquefied into exhaled air condensate when meeting cold due to the fact that the condensation tube 20 provides a low-temperature environment for the exhalation tube 10. The exhaled breath condensate slips off the tube wall and drips into the liquid collector 30, thus completing the collection of exhaled breath condensate. The exhaled air condensate collecting device comprises an exhaling pipe 10, a condensation pipe 20 and a liquid collector 30, and has simple structure and small volume; the exhaled gas condensate collecting device is not limited by the collecting place, is easy to operate and is convenient to use.

In one embodiment, referring to fig. 1, the condensation pipe 20 is sleeved outside the exhalation pipe 10, and the exhalation pipe 10 is provided with a support member 14 for supporting the condensation pipe 20. In a low-temperature environment, the exhaled breath in the exhalation tube 10 is liquefied to form exhaled breath condensate, and the exhaled breath condensate slides along the inner tube wall of the exhalation tube 10 and drops into the liquid collector 30, so that the exhaled breath condensate is collected in the liquid collector 30, and quantitative analysis and qualitative analysis of the exhaled breath condensate are facilitated.

Specifically, referring to fig. 1 and 2, the supporting member 14 is a tray, the size of the tray is not smaller than the diameter of the condensation pipe 20, the condensation pipe 20 is sleeved outside the exhalation pipe 10, and the bottom end of the condensation pipe 20 is located on the tray. Of course, the support members 14 may also be support strips, blocks, etc. that are spaced along the outer walls of the exhalation tube 10. For example, two support bars or support blocks are provided, and the two support bars or the two support blocks are symmetrically arranged on the outer side tube wall of the expiratory tube 10; or more than three supporting strips or supporting blocks are arranged on the outer side pipe wall of the expiration pipe 10 at equal intervals. In this embodiment, the support 14 is a tray, which is disposed on the outer wall of the exhaling tube 10, and is located at the bottom of the exhaling tube 10, and the tray is integrally formed with the exhaling tube 10.

In another embodiment, the above-mentioned exhaling pipe 10 is sleeved outside the condensation pipe 20, and a channel for gas to flow is formed between the inner pipe wall of the exhaling pipe 10 and the outer pipe wall of the condensation pipe 20. The air is blown into the channel through the air inlet 11, the exhaled air in the channel is directly liquefied into exhaled air condensate in a low-temperature environment, the exhaled air condensate slides from the outer side pipe wall of the condensation pipe 20 and drops into the liquid collector 30, and therefore the exhaled air condensate is collected in the liquid collector 30, and quantitative analysis and qualitative analysis are conveniently carried out on the exhaled air condensate.

Furthermore, a plurality of positioning sheets are annularly arranged on the outer side tube wall of the condensation tube 20, the end parts of the positioning sheets are abutted against the inner side tube wall of the expiration tube 10, and the condensation tube 20 and the expiration tube 10 are connected together through the positioning sheets. Specifically, the positioning piece is provided with a non-slip mat, and the non-slip mat is positioned at the end part of the positioning piece. Through set up the slipmat on the spacer, can increase the frictional force between the inboard pipe wall of spacer and exhaling pipe 10 to ensure the stability of being connected between exhaling pipe 10 and the condenser pipe 20, avoid appearing the relative slip because of exhaling between pipe 10 and the condenser pipe 20, and influence the collection of exhaling gas condensate.

In the present embodiment, four positioning pieces are provided, and the four positioning pieces are arranged on the outer tube wall of the condensation tube 20 at intervals. A gap is left between two adjacent positioning sheets so that the exhaled air condensate can slide down from the tube wall and drop into the liquid collector 30. The number and the position of the positioning pieces can be set according to actual requirements, and the number and the position are not limited to the above.

In one embodiment, referring to fig. 1 and 3, the condensation duct 20 is a hollow structure. The first embodiment is that the condensation pipe 20 comprises a first pipe wall 21 and a second pipe wall 22, the first pipe wall 21 is located at the inner side of the second pipe wall 22, and the first pipe wall 21 and the second pipe wall 22 of the condensation pipe 20 are enclosed to form an accommodating cavity 23; the first duct wall 21 encloses a space having dimensions adapted to the dimensions of the exhalation duct 10. Specifically, the condensation pipe 20 is sleeved outside the expiration pipe 10, and an outer pipe wall of the expiration pipe 10 is in contact with a first pipe wall 21 of the condensation pipe 20. When the exhalation machine is used, a condensing agent is injected into the accommodating cavity 23 of the condensation pipe 20, the condensing agent provides a low-temperature environment for the exhalation pipe 10, and exhaled air in the exhalation pipe 10 is gasified into exhaled air condensate. In the second embodiment, the condensation pipe 20 only includes the second pipe wall 22, the condensation pipe 20 is sleeved outside the expiration pipe 10, and an accommodating cavity 23 is formed between the outer pipe wall of the expiration pipe 10 and the second pipe wall 22 of the condensation pipe 20. Or, the exhaling pipe 10 is sleeved outside the condensation pipe 20, and the second pipe wall 22 of the condensation pipe 20 is surrounded to form the accommodating cavity 23.

Specifically, the condensing agent is a high polymer compound, brine, or the like. The high polymer compound, the saline water and the like absorb the heat of the exhaled air in the exhalation tube 10, and the exhaled air is directly liquefied into exhaled air condensate. In this embodiment, the condensing agent is 25% saline, and the frozen 25% saline is injected into the accommodating cavity 23, and the frozen 25% saline provides a low temperature environment for the exhalation tube 10.

Further, referring to fig. 1 and 3, the exhaled breath condensate collecting apparatus further includes a first sealing cap 24, and the first sealing cap 24 is fitted to the open end of the condensation duct 20. When the condensing device is used, the condensing agent is injected into the condensing pipe 20, and the first sealing cover 24 is covered on the opening end of the condensing pipe 20 to prevent the condensing agent from spilling out of the opening end of the condensing pipe 20.

In another embodiment, the condensation duct 20 is a solid structure. In the first embodiment, a space for the expiration duct 10 is provided in the condensation duct 20 having a solid structure. The second embodiment is to sleeve the exhaling pipe 10 outside the solid condensation pipe 20. When the liquid collector is used, the condensation pipe 20 is placed in a refrigerator to be frozen for more than 1 hour, after the freezing is finished, the condensation pipe 20 is taken out, the condensation pipe 20 and the expiration pipe 10 are arranged in an embedded mode, and the liquid collector 30 is connected to the expiration pipe 10. Due to the low temperature of the condensation pipe 20, the exhaled breath in the exhalation pipe 10 is directly liquefied to form exhaled breath condensate, and the exhaled breath condensate slides down and drops into the liquid collector 30 under the action of the self gravity, so that the collection of the exhaled breath condensate is completed.

Further, referring to fig. 1, the exhaled breath condensate collecting apparatus further includes a blowing mouthpiece 40, and the blowing mouthpiece 40 is provided at the air inlet 11. By providing a blowing mouthpiece 40 at the air inlet 11, it is convenient for the user to blow air into the exhalation tube 10. Specifically, the air-blowing mouthpiece 40 is inserted into the air inlet 11 of the exhalation tube 10, and the air-blowing mouthpiece 40 is installed in an inserted manner, so that the air-blowing mouthpiece 40 can be conveniently detached from the exhalation tube 10 for replacement or periodic cleaning. In addition, the size of the exhaled breath condensate collecting device after disassembly is small, and the exhaled breath condensate collecting device is convenient to carry, so that the collecting place of the exhaled breath condensate collecting device is not limited.

Specifically, referring to fig. 1 and 2, an insertion tube 15 is convexly disposed at the air inlet 11 of the exhalation tube 10, and the insertion tube 15 and the exhalation tube 10 are integrally formed. The end of the air-blowing mouthpiece 40 is sleeved outside the insertion tube 15, or the end of the air-blowing mouthpiece 40 is inserted in the insertion tube 15, so as to increase the length of the insertion tube 15, and facilitate the user to exhale into the expiratory tube 10. The end of the air blowing mouthpiece 40 is flat, on one hand, the flat air blowing mouthpiece 40 is convenient for the user to hold and blow air; on the other hand, as the size of the end of the insufflation mouthpiece 40 becomes smaller, the amount of gas that flows back from the exhalation tube 10 into the insertion tube 15 can be reduced.

Further, the end of the insertion tube 15 connected with the air blowing mouthpiece 40 is an air inlet end, the end of the insertion tube 15 connected with the expiratory tube 10 is an air outlet end, the air outlet end of the insertion tube 15 is higher than the air inlet end, i.e. the insertion tube 15 is inclined towards the top end of the expiratory tube 10. Since the gas outlet end of the insertion pipe 15 is higher than the gas inlet end, the exhaled gas has a velocity of inclining upward from the inside of the insertion pipe 15, and the exhaled gas rises rapidly and is liquefied into exhaled gas condensate by contacting with the condensation pipe 20, which is advantageous to increase the collection velocity of the exhaled gas condensate. Specifically, the included angle between the insertion pipe 15 and the horizontal plane ranges from 15 degrees to 60 degrees. In this embodiment, the angle between the bayonet tube 15 and the horizontal is 20 °.

In one embodiment, the air outlet end of the insertion tube 15 protrudes from the inner wall of the exhalation tube 10, and the air outlet end of the insertion tube 15 does not exceed the central axis of the exhalation tube 10, so that the exhaled air condensate in the exhalation tube 10 can be prevented from flowing back into the insertion tube 15.

Further, referring to fig. 1 and 2, an air outlet 12 is disposed at a top end of the exhalation tube 10, a liquid inlet 13 is disposed at a bottom end of the exhalation tube 10, the liquid collector 30 is connected to a bottom end of the exhalation tube 10, and the exhalation tube 10 is communicated with the liquid collector 30. The expiratory tube 10 is communicated with the outside through the air outlet 12, so that the internal pressure and the external pressure of the expiratory tube 10 are consistent, a user can continuously blow air into the expiratory tube 10, and the collection of the expiratory condensate is facilitated. Meanwhile, the exhaled air in the exhalation tube 10 enters the outside from the air outlet 12, and a user can continuously blow air into the exhalation tube 10, so that the collection amount of the exhaled air condensate can be increased, and the quantitative analysis and the qualitative analysis of the exhaled air condensate can be accurately performed. In addition, in low temperature environments, the exhaled breath within the exhalation tube 10 is directly liquefied to form exhaled breath condensate. Because the liquid collector 30 is arranged at the bottom end of the exhaling pipe 10, the exhaled breath condensate slides down from the inner pipe wall of the exhaling pipe 10 or the outer pipe wall of the condensation pipe 20 and drops into the liquid collector 30 under the action of self gravity, so that the collection of the exhaled breath condensate can be completed.

Further, referring to fig. 1 and 2, the air inlet 11 is disposed at the bottom of the exhalation tube 10. A user blows air into the expiratory tube 10 through the air inlet 11, and the expired air in the expiratory tube 10 is liquefied under the action of low temperature to form expired air condensate. Since the air inlet 11 is located at the bottom end of the exhalation tube 10, the contact time between the exhaled air in the exhalation tube 10 and the condensation tube 20 can be increased, so as to improve the collection efficiency of the exhaled air condensate.

In one embodiment, the exhalation tube 10 is a cone-shaped structure, and specifically, the size of the air outlet 12 of the exhalation tube 10 is smaller than the size of the liquid inlet 13 of the exhalation tube 10. Because the expiratory tube 10 is of a conical structure, on one hand, the contact area between the expired air in the expiratory tube 10 and the condenser tube 20 can be increased, and the condensation speed of the expired air is increased; on the other hand, as the size of the air outlet 12 of the expiratory tube 10 is reduced, the speed of the exhaled air in the expiratory tube 10 entering the outside can be reduced, and the collection efficiency of the exhaled air condensate can be improved. Of course, the exhalation tube 10 described above may also be cylindrical, so that exhaled breath condensate can quickly slide off and drip into the liquid collector 30.

Further, a liquid collector 30 is detachably attached to the bottom end of the exhalation tube 10. After the exhaled breath condensate is collected, the liquid collector 30 is detached from the exhalation tube 10, which facilitates the separate storage of the exhaled breath condensate within the liquid collector 30 and the use of the exhaled breath condensate. If the exhaled breath condensate needs to be collected again, a clean liquid collector 30 is taken and the liquid collector 30 is mounted at the bottom end of the exhalation tube 10, so that the exhaled breath condensate can be collected. The exhalation tube 10 and the liquid collector 30 are both disposable, and there is no cross contamination between samples during the exhaled breath condensate collection process, which can improve the accuracy of the quantitative and qualitative analysis of exhaled breath condensate.

In one embodiment, referring to FIG. 1, the liquid collector 30 is threaded onto the exhalation tube 10. Specifically, the aperture of the liquid inlet 13 of the exhalation tube 10 is matched with the aperture of the liquid collector 30, the liquid inlet 13 of the exhalation tube 10 is provided with an external thread, the liquid collector 30 is provided with an internal thread, and the exhalation tube 10 is in threaded connection with the liquid collector 30. Or, the liquid inlet 13 of the expiration pipe 10 is provided with an internal thread, the liquid collector 30 is provided with an external thread, and the expiration pipe 10 and the liquid collector 30 are connected in a threaded manner. By twisting the liquid collector 30, the liquid collector 30 can be detached from the exhalation tube 10 for separate storage and use of exhaled breath condensate within the liquid collector 30.

In another embodiment, the exhalation tube 10 is snap-fit to the liquid collector 30. Specifically, a convex column is arranged on the liquid collector 30, and a clamping groove matched with the convex column is arranged at the liquid inlet 13 of the expiration pipe 10. Or, a convex column is arranged at the liquid inlet 13 of the expiration pipe 10, and a clamping groove matched with the convex column is arranged on the liquid collector 30. Through the cooperation of the convex columns and the clamping grooves, the liquid collector 30 can be arranged on the expiratory tube 10 to collect the expiratory gas condensate.

Further, the liquid collector 30 is transparent or translucent, and the liquid collector 30 is provided with a scale. By observing the scale on the liquid collector 30, the volume of exhaled breath condensate can be measured. When in use, a user blows air into the expiratory tube 10, and the expired air in the expiratory tube 10 is liquefied into expired air condensate when meeting cold, and then drops into the liquid collector 30. When the condensate of the expired air in the liquid collector 30 reaches the designated scale mark, the air blowing into the expiration pipe 10 is stopped, the liquid collector 30 on the expiration pipe 10 is taken down at the same time, and the liquid collector 30 is frozen and stored after being sealed.

Specifically, the liquid collector 30 is a liquid collecting pipe, a liquid collecting tube, or the like. The liquid collector 30 is made of transparent glass, plastic, medical silica gel, etc. In this embodiment, the liquid collector 30 is a plastic collecting pipe, and the scales are arranged on the outer pipe wall of the plastic collecting pipe; the maximum scale value is 5ml, and the interval between two adjacent scales is 0.5 ml.

Further, a second sealing cover is disposed on the liquid collector 30, and the exhaled breath condensate in the liquid collector 30 is prevented from being spilled out of the liquid collector 30 by covering the second sealing cover on the liquid collector 30, so as to facilitate the preservation of the exhaled breath condensate. Specifically, the second sealing cover is screwed on the liquid collector 30; alternatively, the second sealing cap is coupled to the liquid collector 30 in a snap-fit manner.

The use process of collecting the exhaled breath condensate by adopting the exhaled breath condensate collecting device is as follows: the condenser tube 20 is put into a refrigerator to be frozen for more than 1 hour, and after the condenser tube 20 is frozen, the condenser tube 20 is taken out of the refrigerator. The air-breathing pipe 10 and the condensation pipe 20 are arranged together in an embedded mode, the liquid collector 30 is connected to the air-breathing pipe 10, and the air-blowing mouthpiece 40 is arranged at the air inlet 11 of the air-breathing pipe 10. After the exhaled gas is assembled, a condensing agent is injected into the condensing tube 20. The user holds the air blowing mouthpiece 40 and blows air into the exhalation tube 10 through the air blowing mouthpiece 40 for a period of time of 1 to 10 minutes (the specific air blowing period is based on the volume of the exhaled breath condensate to be collected) until the level of the exhaled breath condensate collected in the liquid collector 30 reaches the specified scale mark. After the exhaled gas condensate is collected, the liquid collector 30 is removed from the exhalation tube 10, and the liquid collector 30 is sealed and then stored in a frozen state.

The exhalation tube 10, the liquid collector 30 and the air blowing mouthpiece 40 are made of medical plastics, medical rubber and the like. On one hand, the expiration pipe 10, the liquid collector 30 and the air blowing mouthpiece 40 which are made of medical plastics and medical rubber materials can reduce the material consumption and cost; on the other hand, the disposable consumable material can reduce the possibility of polluting the exhaled breath condensate. The condensation duct 20 can be used several times to reduce costs. The exhaled breath condensate collecting device in this embodiment can realize quick, many people of no secondary pollution once sample, improves exhaled breath condensate's collection efficiency, and exhaled breath condensate collecting device is small moreover, the collection place is unrestricted, easily operates.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An exhaled breath condensate collection device, comprising:

the air inlet is arranged on the air outlet pipe;

the liquid collector is connected with the expiratory tube and used for collecting expiratory gas condensate in the expiratory tube.

2. The exhaled breath condensate collection device of claim 1, further comprising a blow-off mouthpiece disposed at the air inlet.

3. The exhaled breath condensate collecting device of claim 1 or 2, wherein the top end of the exhalation tube is provided with an air outlet, the bottom end of the exhalation tube is provided with a liquid inlet, the liquid collector is connected to the bottom end of the exhalation tube, and the exhalation tube is communicated with the liquid collector.

4. The exhaled breath condensate collection device of claim 3, wherein the exhalation tube is of a tapered configuration, the exhalation tube having an outlet orifice that is smaller in size than an inlet orifice of the exhalation tube.

5. An exhaled breath condensate collection device according to claim 1 or 2, wherein the air inlet is provided at the bottom of the exhalation tube.

6. An exhaled breath condensate collection apparatus according to claim 1 or 2, wherein the condenser tube is sleeved outside the exhalation tube, and a support member for supporting the condenser tube is provided on the exhalation tube; or the expiration pipe is sleeved outside the condensation pipe.

7. The exhaled breath condensate collecting device of claim 1 or 2, wherein the condensation duct is a hollow structure, and a receiving cavity for receiving a condensing agent is arranged in the condensation duct; or the condensation pipe is of a solid structure.

8. An exhaled breath condensate collection device according to claim 1 or 2, wherein the exhalation tube is detachably connected to the liquid collector.

9. The exhaled breath condensate collection device of claim 8, wherein the bottom end of the exhalation tube is provided with external threads and the liquid collector is provided with internal threads, the exhalation tube being in threaded connection with the liquid collector; or the bottom end of the expiration pipe is provided with an internal thread, the liquid collector is provided with an external thread, and the expiration pipe is in threaded connection with the liquid collector.

10. An exhaled breath condensate collection device according to claim 1 or 2, wherein the liquid collector is transparent or translucent and wherein a scale is provided on the liquid collector.