Gas sampling and filtering device

Abstract

The invention 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 formed in the device shell, a gas inlet and a gas outlet are formed in the two ends of the gas guide tube cavity respectively, a filtering structure layer is arranged between the gas outlet and the gas guide tube cavity, and a water absorption structure layer is arranged on the filtering structure layer in an attached mode; 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, and in particular to a gas sampling filtering device. Background Art

[0002] Human breath contains thousands of volatile organic compounds (VOCs) present at trace levels. These VOCs are continuously produced during metabolism and released from the alveoli into the breath via blood-gas exchange. Disease is often accompanied by alterations in metabolic pathways, which can lead to detectable changes in the VOC profile of exhaled breath. Therefore, analysis of exhaled breath can facilitate the identification of disease biomarkers and the formation of preliminary diagnoses of medical conditions.

[0003] At present, existing clinical gas sampling, filtering and detecting devices usually adopt the filtering method of waterproof breathable tube or waterproof breathable membrane and drying cotton. In the sampling process of this type of device, the sampled gas passes through the filter water storage cavity and then enters the sampling and detecting device for analysis and calculation. Because there is a certain volume of cavity in the filter water storage cavity, this part of the cavity has a certain influence on the accuracy of gas sampling analysis and calculation. The larger the filter 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 impact on the accuracy of gas detection. On the contrary, the life is short. Both are not good for patients. Summary of the invention

[0004] The main purpose of the present invention is to provide a gas sampling filter device and system, aiming to solve the technical problem that the existing gas sampling filter structure affects the sampling and analysis accuracy.

[0005] In order to solve the above technical problems, the present invention provides a gas sampling and filtering device, comprising: a device shell, in which a water storage chamber and an air guide tube chamber separated from each other are arranged inside the device shell, an air inlet and an air outlet are respectively arranged at both ends of the air guide tube chamber, a filter structure layer is arranged between the air outlet and the air guide tube chamber, and a water absorption structure layer is laminated to the filter structure layer; gas enters the air guide tube chamber from the air inlet, the filter structure layer is used to filter moisture in the gas, and the water absorption structure layer is used to absorb moisture and transport it to the water storage chamber.

[0006] Furthermore, the gas sampling and filtering device also includes an air circuit connector, which is connected and arranged at one end of the device shell, and 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 air circuit connector and the end of the air guide tube cavity.

[0007] Furthermore, the air outlet is arranged in the air path connector, the filter structure layer and the water absorption structure layer are arranged between the air outlet and the air guide tube cavity, and the gas in the air guide tube cavity enters the air outlet after passing through the filter structure layer.

[0008] Furthermore, a water storage filling layer is provided in the water storage cavity, and the water storage filling layer is used for absorbing and storing the water transported by the water absorption structure layer.

[0009] Furthermore, one end of the air guide lumen is connected to 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 guide lumen and is attached to the filter structure layer.

[0010] Specifically, the water-absorbing structure layer is an annular structure layer made of water-absorbing and airtight material, one end of the air guide 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 a 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] Furthermore, 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-absorbing structure layer, moisture in the gas is retained and adsorbed on one side of the water-absorbing structure layer, and dry gas enters the air outlet from the other side of the filter structure layer.

[0013] Beneficial effects of the technical solution of the present invention:

[0014] The gas sampling filter device of the embodiment of the present invention effectively isolates the connection between the filter water storage chamber and the gas sampling passage, so that the sampled gas does not pass through the water storage chamber, but directly enters the sampling calculation instrument through the filter device. In this way, the cavity is small, the sampling calculation accuracy is improved, and it is beneficial to treat patients. In addition, since the connection between the water storage chamber and the gas sampling passage is isolated, the filter water storage chamber can theoretically be infinitely large, and the shape and size of the entire device are not limited and can be easily replaced. The lengthening and expansion of the water storage chamber also prolongs the service life of the device, reduces medical costs, and is beneficial to patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional structural diagram of a gas sampling and filtering device provided by an embodiment of the present invention;

[0016] Figure 2 It is a three-dimensional structural diagram of a gas sampling and filtering device provided by an embodiment of the present invention;

[0017] Figure 3 This is a flow chart of a gas sampling and filtering device provided by an embodiment of the present invention;

[0018] Among them, 10-device shell, 11-air inlet, 12-air guide tube cavity, 13-water storage cavity, 20-air path connector, 21-air outlet, 30-filter structure layer, 40-water absorption structure layer, 50-water storage filling layer.

[0019] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0020] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0021] Example 1

[0022] like Figure 1 , 2 As shown, an embodiment of the present invention provides a gas sampling and filtering device, comprising: a device shell 10, in which a water storage chamber 13 and an air guide tube chamber 12 separated from each other are arranged, and an air inlet 11 and an air outlet 21 are respectively arranged at both ends of the air guide tube chamber 12, and a filter structure layer 30 is arranged between the air outlet 21 and the air guide tube chamber 12, and a water absorption structure layer 40 is arranged on the filter structure layer 30; gas enters the air guide tube chamber 12 from the air inlet 11, the filter structure layer 30 is used to filter moisture in the gas, and the water absorption structure layer 40 is used to absorb moisture and transport it to the water storage chamber 13.

[0023] The gas to be tested enters the gas sampling filter structure layer 30 of the present invention (the device is not limited to any size, shape or structure) through the air inlet. When passing through the filter structure layer 30, the moisture in the gas to be tested is separated by the filter structure layer 30 and then absorbed by the water absorption structure layer 40. At the same time, the water absorption structure layer 40 introduces the moisture into the water storage filling layer 50, thereby achieving the purpose of drying the gas to be tested and storing water.

[0024] Among them, the gas sampling and filtering device also includes an air circuit connector 20, which is connected to one end of the device housing 10, and the air inlet 11 is arranged at the other end of the device housing 10; the filter structure layer 30 and the water absorption structure layer 40 are arranged at the ends of the air circuit connector 20 and the air guide tube cavity 11.

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

[0026] Wherein, a water storage filling layer 50 is disposed in the water storage cavity 13 , and the water storage filling layer 50 is used for absorbing and storing the water transported by the water absorption structure layer 40 .

[0027] Among them, one end of the air guide lumen 12 is connected to the air inlet 11, and the other end is attached to one side of the filtering structure layer 30, and the water absorption structure layer 40 surrounds the air guide lumen 12 and is attached to the filtering structure layer 30. In this way, the gaps between the two sides of the water absorption structure layer 40 and the gas path connector 20 and the end of the air guide lumen 12 are extremely small, avoiding a large amount of water or gas from being retained in the gap, thereby maximizing the dead space volume and further improving the analysis accuracy.

[0028] Specifically, the water-absorbing structure layer 40 is an annular structure layer made of a water-absorbing and air-impermeable material, one end of the air guide cavity 12 is arranged at 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 airtight or almost airtight, but the present invention is not limited to these materials.

[0029] Specifically, the water storage cavity 13 is filled with a water storage filling layer 50 made of a 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] Among them, the filtering structure layer 30 is made of air-permeable and water-impermeable material, and one side of the filtering structure layer 30 is attached to the water-absorbing structure layer 40. The moisture of the gas remains on one side of the water-absorbing structure layer 40 and is adsorbed, and the dry gas enters the air outlet 21 from the other side of the filtering structure layer 30.

[0031] like Figure 3 As shown, when in use, there is only a very small cavity when the gas to be tested enters the filter device, which is conducive to gas sampling, analysis and calculation, thereby making the gas detection more accurate. The gas to be tested does not pass through the water storage filling layer, and the cavity of the water storage filling layer has no effect on the gas detection accuracy. The water storage filling layer can theoretically be infinitely large, which can increase the service life of the device and help reduce medical costs.

[0032] The gas sampling filter device of the embodiment of the present invention effectively isolates the connection between the filter water storage chamber and the gas sampling passage, so that the sampled gas does not pass through the water storage chamber, but directly enters the sampling calculation instrument through the filter device. In this way, the cavity is small, the sampling calculation accuracy is improved, and it is beneficial to treat patients. In addition, since the connection between the water storage chamber and the gas sampling passage is isolated, the filter water storage chamber can theoretically be infinitely large, and the shape and size of the entire device are not limited and can be easily replaced. The lengthening and expansion of the water storage chamber also prolongs the service life of the device, reduces medical costs, and is beneficial to patients.

[0033] The serial numbers of the embodiments of the present invention are only for description and do not represent the advantages and disadvantages of the embodiments. The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A gas sampling and filtering device, characterized in that: The device comprises: A device shell, wherein a water storage cavity and an air guide cavity separated from each other are arranged in the device shell, an air inlet and an air outlet are arranged at both ends of the air guide cavity respectively, a filter structure layer is arranged between the air outlet and the air guide cavity, and a water absorption structure layer is arranged on the filter structure layer; gas enters the air guide cavity from the air inlet, the filter structure layer is used for filtering moisture in the gas, and the water absorption structure layer is used for absorbing moisture and transporting it to the water storage cavity.

2. The gas sampling and filtering device according to claim 1, characterized in that: The device also includes an air circuit connector, which is 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 air circuit connector and the end of the air guide tube cavity.

3. The gas sampling and filtering device according to claim 2, characterized in that: The air outlet is arranged in the air path joint, the filter structure layer and the water absorption structure layer are arranged between the air outlet and the air guide tube cavity, and the gas in the air guide tube cavity enters the air outlet after passing through the filter structure layer.

4. The gas sampling and filtering device according to claim 1, characterized in that: A water storage filling layer is arranged in the water storage cavity, and the water storage filling layer is used for absorbing and storing the water transported by the water absorption structure layer.

5. The gas sampling and filtering device according to claim 1, characterized in that: One end of the air guide lumen is connected to 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 lumen and is attached to the filter structure layer.

6. The gas sampling and filtering device according to claim 5, characterized in that: The water-absorbing structural layer is an annular structural layer made of water-absorbing and airtight material, one end of the air guide cavity is arranged at the center of the annular structural layer, one side of the annular structural layer is attached to the filter structural layer, and the other side is arranged at one end of the water storage cavity.

7. The gas sampling and filtering device according to claim 6, characterized in that: The water storage cavity is filled with a water storage filling layer made of a 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 and filtering device according to claim 1, characterized in that: 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-absorbing structure layer. The moisture of the gas is retained and adsorbed on one side of the water-absorbing structure layer, and the dry gas enters the air outlet from the other side of the filter structure layer.

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