Gas sampling and filtering device

Abstract

The utility model discloses a gas sampling and filtering device which comprises a device shell, a water storage cavity and a gas guide tube cavity which are separated from each other are arranged in the device shell, a gas inlet and a gas outlet are respectively arranged at two ends of the gas guide tube cavity, a filtering structure layer is arranged between the gas outlet and the gas guide tube cavity, and a water absorption structure layer is attached to the filtering structure layer; gas enters the gas guide pipe cavity from the gas inlet, the filtering structure layer is used for filtering moisture in the gas, and the water absorption structure layer is used for absorbing the moisture and conveying the moisture to the water storage cavity. The device isolates communication between the filtering water storage cavity and the gas sampling channel, sampled gas directly passes through the filtering device without passing through the water storage cavity and enters a sampling calculation instrument, and the sampling calculation precision is improved; in addition, the filtering water storage cavity can be infinitely large theoretically, the shape and the size of the whole device are not limited, the device can be conveniently replaced, and the water storage cavity is lengthened and expanded, so that the service life of the device is long, the medical cost is reduced, and the device is beneficial to patients.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas sampling equipment, in particular to a gas sampling and filtering device. BACKGROUND

[0002] Human breath contains thousands of volatile organic compounds (VOCs) at trace levels. These VOCs are continuously produced during metabolism and released into breath from alveoli via blood gas exchange. Diseases often accompany changes in metabolic pathways, thus causing detectable changes in the distribution of VOCs in exhaled breath. Therefore, analysis of exhaled breath can facilitate the identification of disease biomarkers and the formation of preliminary diagnosis of medical conditions.

[0003] At present, the existing gas sampling and filtering detection device in the clinic usually adopts a filtering mode of a waterproof air-permeable tube or a waterproof air-permeable film and dry cotton. In this mode, the sampled gas passes through the filtering and water storage cavity and then enters the sampling and detection device for analysis and calculation. Since the filtering and water storage cavity has a certain volume of cavity, this part of the cavity has a certain influence on the sampling and analysis accuracy of the gas. The larger the filtering and water storage cavity of the device, the more water is stored, and the longer the service life is. However, the larger the cavity, the greater the influence on the accuracy of gas detection. Conversely, the service life is short, and both are not conducive to the patient. SUMMARY

[0004] The main purpose of the present application is to provide a gas sampling and filtering device and system, which aims to solve the technical problem of the influence of the existing gas sampling and filtering structure on the sampling and analysis accuracy.

[0005] In order to solve the above technical problems, the present application provides a gas sampling and filtering device, which comprises: a device shell, a water storage cavity and a gas guide pipe cavity are arranged in the device shell and are separated from each other, an air inlet and an air outlet are arranged at two ends of the gas guide pipe cavity respectively, a filtering structure layer is arranged between the air outlet and the gas guide pipe cavity, and a water absorption structure layer is arranged in close contact with the filtering structure layer; gas enters the gas guide pipe cavity from the air inlet, the filtering structure layer is used for filtering water in the gas, and the water absorption structure layer is used for absorbing water and conveying the water to the water storage cavity.

[0006] Further, the gas sampling and filtering device further comprises a gas path joint, the gas path joint is connected and arranged at one end of the device shell, the air inlet is arranged at the other end of the device shell; the filtering structure layer and the water absorption structure layer are arranged at the end of the gas guide pipe cavity and the gas path joint.

[0007] Further, the air outlet is arranged in the gas path joint, and the filtering structure layer and the water absorption structure layer are arranged between the air outlet and the gas guide pipe cavity. The gas in the gas guide pipe cavity enters the air outlet after passing through the filtering structure layer.

[0008] Further, the water storage cavity is provided with a water storage filling layer for adsorbing and storing the moisture delivered by the water absorption structure layer.

[0009] Further, one end of the air guide tube cavity is communicated with the air inlet, and the other end is attached to one side of the filter structure layer, the water absorption structure layer surrounds the air guide tube cavity and is attached to the filter structure layer.

[0010] Specifically, the water absorption structure layer is an annular structure layer made of water absorption and air impermeable material, one end of the air guide tube cavity is arranged at the center of the annular structure layer, one side of the annular structure layer is attached to the filter structure layer, and the other side is arranged at one end of the water storage cavity.

[0011] Specifically, the water storage cavity is filled with a water storage filling layer made of hydrophilic material, and the water storage filling layer is attached to the water absorption structure layer at one end of the water storage cavity.

[0012] Further, the filter structure layer is made of air permeable and water impermeable material, one side of the filter structure layer is attached to the water absorption structure layer, the moisture of the gas is left on one side of the water absorption structure layer and is adsorbed, and the dry gas enters the air outlet from the other side of the filter structure layer.

[0013] The beneficial effects of the technical scheme of the utility model:

[0014] The gas sampling and filtering device of the utility model embodiment effectively isolates the connection between the filtering water storage cavity and the gas sampling passage, so that the sampled gas does not pass through the water storage cavity and directly enters the sampling calculation instrument through the filtering device, the cavity is small, the sampling calculation precision is improved, and the patient is beneficially treated. In addition, since the connection between the water storage cavity and the gas sampling passage is isolated, the filtering water storage cavity can be theoretically made unlimitedly large, and the entire device shape and size are not limited and can be conveniently replaced, the lengthening and enlargement of the water storage cavity also make the service life of the device long, reduce the medical cost, and benefit the patient. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a sectional view of a gas sampling and filtering device provided by the utility model embodiment;

[0016] Figure 2 is a three-dimensional structure diagram of a gas sampling and filtering device provided by the utility model embodiment;

[0017] Figure 3 is a flow chart of a gas sampling and filtering device provided by the utility model embodiment;

[0018] Wherein, 10 - device housing, 11 - air inlet, 12 - air duct cavity, 13 - water storage cavity, 20 - gas joint, 21 - air outlet, 30 - filter structure layer, 40 - water absorption structure layer, 50 - water storage filling layer.

[0019] The realization, functional features and advantages of the utility model will be further explained in combination with embodiments and with reference to the drawings. DETAILED DESCRIPTION

[0020] It should be understood that the specific embodiments described herein are merely intended to explain the utility model, and are not intended to limit the utility model.

[0021] Example 1

[0022] As Figure 1 , 2 shown, the utility model embodiment provides a kind of gas sampling filter device, comprising: device housing 10, water storage cavity 13 and air duct cavity 12 are arranged in the device housing 10 and are separated from each other, air duct cavity 12 two ends are provided with air inlet 11 and air outlet 21 respectively, filter structure layer 30 is provided between the air outlet 21 and the air duct cavity 12, and filter structure layer 30 is attached with water absorption structure layer 40;Gas enters the air duct cavity 12 from the air inlet 11, the filter structure layer 30 is used to filter the moisture in gas, and the water absorption structure layer 40 is used to absorb moisture and transport to the water storage cavity 13.

[0023] The detected gas enters the gas sampling filter structure layer 30 (the device is not limited to any size shape structure) of the utility model through air inlet, when passing through filter structure layer 30, the moisture in the detected gas is separated by filter structure layer 30, can be then absorbed by water absorption structure layer 40, while water absorption structure layer 40 guides moisture into water storage filling layer 50, to reach the role of drying detected gas and storing water.

[0024] Wherein, the gas sampling filter device further includes gas joint 20, the gas joint 20 is connected and arranged at one end of the device housing 10, and the air inlet 11 is arranged at the other end of the device housing 10;The gas joint 20 and the air duct cavity 11 end are provided with the filter structure layer 30 and the water absorption structure layer 40.

[0025] Wherein, the air outlet 21 is arranged in the gas joint 20, the filter structure layer 30 and the water absorption structure layer 40 are arranged between the air outlet 212 and the air duct cavity 11, and the gas in the air duct cavity 11 enters the air outlet 21 after passing through the filter structure layer 30.

[0026] The water storage cavity 13 is internally provided with a water storage filling layer 50, which is used for adsorbing and storing the moisture delivered by the water absorption structure layer 40.

[0027] The air guide pipe cavity 12 is communicated with the air inlet 11 at one end and is attached to one side of the filter structure layer 30 at the other end, and the water absorption structure layer 40 surrounds the air guide pipe cavity 12 and is attached to the filter structure layer 30. In this way, the gap between the two sides of the water absorption structure layer 40 and the attachment places between the air path connector 20 and the end of the air guide pipe cavity 12 is extremely small, so that a large amount of moisture or gas is avoided to be left in the gap, thereby the dead cavity volume is maximally reduced, and the analysis accuracy is further improved.

[0028] Specifically, the water absorption structure layer 40 is an annular structure layer made of water absorption and air impermeable material, one end of the air guide pipe cavity 12 is arranged in the center of the annular structure layer, one side of the annular structure layer is attached to the filter structure layer 30, and the other side is arranged at one end of the water storage cavity 13. For example, cloth, paper and sponge can absorb water and be air impermeable or almost air impermeable, but the utility model is not limited to these materials.

[0029] Specifically, the water storage cavity 13 is internally filled with a water storage filling layer 50 made of hydrophilic material, and the water storage filling layer 50 is attached to the water absorption structure layer 40 at one end of the water storage cavity 13.

[0030] The filter structure layer 30 is made of air permeable and water impermeable material, one side of the filter structure layer 30 is attached to the water absorption structure layer 40, and the moisture of the gas is left on one side of the water absorption structure layer 40 and is adsorbed, and the dry gas enters the air outlet 21 from the other side of the filter structure layer 30.

[0031] As shown in the figure, Figure 3 The air path of the detected gas entering the filter device only exists an extremely small cavity during use, which is beneficial to gas sampling analysis and calculation, so that the accuracy of gas detection is higher. The detected gas does not pass through the water storage filling layer, and the cavity of the water storage filling layer does not affect the accuracy of gas detection. The water storage filling layer can be theoretically unlimited, which can increase the service life of the device and reduce the medical cost.

[0032] The gas sampling filter device of the embodiment of the utility model effectively isolates the connection between the filter water storage cavity and the gas sampling path, so that the sampled gas does not pass through the water storage cavity and directly enters the sampling calculation instrument through the filter device, the cavity is small, the sampling calculation accuracy is improved, and the patient is beneficially treated. In addition, since the connection between the water storage cavity and the gas sampling path is isolated, the filter water storage cavity can be theoretically unlimited in size, and the entire device is not limited in shape and size and can be conveniently replaced. The lengthening and expansion of the water storage cavity also make the service life of the device long, reduce the medical cost, and benefit the patient.

[0033] The above-mentioned embodiment serial numbers of the utility model are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0034] The above is only the preferred embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process transformation made by using the content of the utility model specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the utility model.

Claims

1. A gas sampling filter device, characterized by, The device comprises: The device housing is provided with a water storage cavity and an air duct cavity separated from each other, the air duct cavity is provided with an air inlet and an air outlet at both ends, a filter structure layer is arranged between the air outlet and the air duct cavity, and a water absorption structure layer is arranged on the filter structure layer; gas enters the air duct cavity from the air inlet, the filter structure layer is used for filtering water in the gas, and the water absorption structure layer is used for absorbing water and conveying to the water storage cavity.

2. The gas sampling filter device of claim 1, wherein, The device further comprises an air path connector connected to one end of the device housing, and the air inlet is arranged at the other end of the device housing; the filter structure layer and the water absorption structure layer are arranged at the end of the air duct cavity and the air path connector.

3. The gas sampling filter device of claim 2, wherein, The air outlet is arranged in the air path connector, and the filter structure layer and the water absorption structure layer are arranged between the air outlet and the air duct cavity, and the gas in the air duct cavity enters the air outlet after passing through the filter structure layer.

4. The gas sampling filter device of claim 1, wherein, The water storage cavity is provided with a water storage filling layer, which is used for absorbing and storing the water conveyed by the water absorption structure layer.

5. The gas sampling filter device of claim 1, wherein, One end of the air duct cavity communicates with the air inlet, and the other end is attached to one side of the filter structure layer, and the water absorption structure layer surrounds the air duct cavity and is attached to the filter structure layer.

6. The gas sampling filter device of claim 5, wherein, The water absorption structure layer is an annular structure layer made of water absorption and air impermeable material, one end of the air duct cavity is arranged in the center of the annular structure layer, one side of the annular structure layer is attached to the filter structure layer, and the other side is arranged at one end of the water storage cavity.

7. The gas sampling filter device of claim 6, wherein, The water storage cavity is filled with a water storage filling layer made of hydrophilic material, and the water storage filling layer is attached to the water absorption structure layer at one end of the water storage cavity.

8. The gas sampling filter device of claim 1, wherein, The filter structure layer is made of air permeable and water impermeable material, one side of the filter structure layer is attached to the water absorption structure layer, the water in the gas is left on one side of the water absorption structure layer and is absorbed, and dry gas enters the air outlet from the other side of the filter structure layer.

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