CN215585138U - Moisture filter - Google Patents

Abstract

The present application relates to a moisture filter comprising a housing; an air inlet provided in the housing; an analysis outlet disposed in the housing; the filter cavity is arranged in the shell, the air inlet, the filter cavity and the analysis outlet are sequentially communicated so that respiratory gas can pass through, and a first waterproof and breathable film is arranged in the filter cavity; and the water collecting cavity is arranged in the shell and is communicated with the lower part of the filter cavity. The breathing gas of the patient can sequentially pass through the gas inlet, the filter cavity and the analysis outlet and then enter the medical by-pass gas analyzer, and when the breathing gas passes through the filter cavity, the first water-proof and gas-permeable membrane in the filter cavity can filter moisture in the breathing gas, so that the breathing gas can be separated from the moisture before entering the medical by-pass gas analyzer, and the influence of the moisture on the detection precision of the medical by-pass gas analyzer is reduced. The method and the device have the effect of improving the accuracy of analysis and detection.

Description

Moisture filter

Technical Field

The present application relates to the field of respiratory gas analysis device accessories, and in particular to a moisture filter.

Background

A medical by-pass gas analyzer is a device used for monitoring the breathing of a patient, and is capable of monitoring vital signs of the patient by monitoring changes in the composition and concentration of gases in the breathing gas of the patient. For example, during the anesthesia of a patient, an anesthesiologist may introduce the breathing gas of the patient into a medical by-pass gas analyzer, and detect the corresponding concentration share of the anesthetic gas component in the breathing gas through a gas sensor in the medical by-pass gas analyzer, thereby monitoring the anesthesia state of the patient.

In the prior art, as disclosed in the chinese patent application publication No. CN101153840A, a device for improving the measurement accuracy of a gas analyzer includes: the filter wheel is provided with a plurality of infrared filters; the motor is used for driving the filter wheel to rotate according to a preset frequency; the infrared steady-state light source is used for irradiating a detection air chamber through the infrared filter, and an infrared sensor is arranged behind the detection air chamber and used for receiving light rays of the infrared steady-state light source; and the singlechip system is used for controlling the driving of the motor and carrying out wavelet shrinkage threshold filtering processing on the signal received by the infrared sensor so as to obtain the concentration of the component of the gas to be measured.

However, the breathing gas of the patient generally contains moisture, and if the moisture directly enters the medical side-flow gas analyzer, the moisture may interfere with a gas sensor, such as an infrared sensor in the related art, and affect the detection accuracy of the medical side-flow gas analyzer.

SUMMERY OF THE UTILITY MODEL

In order to improve medical by-pass flow gas analyzer's detection precision, this application provides a moisture filter.

The application provides a moisture filter adopts following technical scheme:

a moisture filter comprising:

a housing;

the air inlet is arranged in the shell and used for inputting the breathing gas into the shell;

an analysis outlet arranged on the shell and used for outputting the breathing gas;

the filter cavity is arranged in the shell, the air inlet, the filter cavity and the analysis outlet are sequentially communicated so that respiratory gas can pass through, and a first water-proof and breathable film for filtering moisture in the respiratory gas is arranged in the filter cavity;

the water collecting cavity is arranged in the shell and communicated with the lower part of the filter cavity and is used for collecting the water filtered by the first water-proof breathable film.

By adopting the technical scheme, the breathing gas of the patient can sequentially pass through the gas inlet, the filter cavity and the analysis outlet and then enter the medical by-pass flow gas analyzer, and when the breathing gas passes through the filter cavity, the first waterproof breathable film in the filter cavity can filter the moisture in the breathing gas, so that the breathing gas can be separated from the moisture before entering the medical by-pass flow gas analyzer, the influence of the moisture on the detection precision of the medical by-pass flow gas analyzer is reduced, and the accuracy of analysis and detection is improved. In addition, under the effect of gravity, the moisture that is filtered by first water proof ventilated membrane can flow into the chamber of catchmenting and collect with the mode of liquid water to reduce the dwell of moisture in the filter chamber, improve the filter effect of first water proof ventilated membrane.

Optionally, a communication cavity is arranged in the shell, the communication cavity is communicated between the analysis outlet and the filter cavity, and the communication cavity is provided with a warning mechanism capable of feeding back according to the humidity in the communication cavity.

Through adopting above-mentioned technical scheme, when the humidity increase in the circulation intracavity, it is more to explain the moisture that exists in the intercommunication chamber, probably to in getting into medical bypass flow gas analysis appearance through the analysis export, and warning mechanism can feed back when the humidity in the intercommunication intracavity is great, reminds the user to circulate the risk that the intracavity has more moisture to in time stop use or change the moisture filter for the user.

Optionally, warning mechanism includes can be based on humidity change in the intercommunication intracavity changes the color development piece of colour, the casing is provided with and supplies the user to observe the color development window of color development piece.

Through adopting above-mentioned technical scheme, user's accessible color development window observes the color development piece directly perceivedly, and the color development piece also can be through the humidity degree of colour change direct-viewing ground to the user feedback intercommunication intracavity. When the humidity in the communicating cavity is large, the color change occurs due to the contact of the color developing piece with the moisture, and at the moment, a user can check the moisture filter and stop using or replace the moisture filter in time.

Optionally, warning mechanism includes the color development piece, the casing is provided with and supplies the user to observe the color development window of color development piece, the color development window is provided with can be based on humidity change in the intercommunication intracavity changes the transparent color piece of transparency.

By adopting the technical scheme, when the humidity in the communicating cavity is low, the color transmitting part is in a semitransparent state, and the visibility of the color developing part is low; when the humidity in the communicating cavity is high, diffuse reflection is reduced by the color-transmitting part, the visibility of the color-developing part is high, and the color-developing part can be observed by a user. When the user can observe the color development piece intuitively, the humidity in the communicating cavity is relatively high, the user is required to check the moisture filter, and the moisture filter is stopped or replaced in time.

Optionally, the warning mechanism includes a moving member capable of sliding in the communicating cavity and a first expansion member capable of deforming based on humidity in the communicating cavity, and the housing is provided with a color development window for a user to observe the moving member;

the first expansion piece can expand after absorbing moisture so as to abut against the moving piece and enable the moving piece to move in the communication cavity.

Through adopting above-mentioned technical scheme, user's accessible color development window observes the position of moving member directly perceivedly, and the moving member also can be through the position change to the user's moist degree of feedback intercommunication intracavity directly perceivedly. When the humidity in the communicating cavity is large, the first expansion piece expands due to contact with moisture and pushes the moving piece to move, and at the moment, a user can check the moisture filter and stop using or replace the moisture filter in time.

Optionally, the analysis outlet is provided with a first swelling member capable of swelling upon absorption of moisture to block the analysis outlet.

Through adopting above-mentioned technical scheme, when moisture need pass through the analysis export, moisture can with first inflation piece contact, and first inflation piece can absorb moisture and take place the inflation, the analysis export can be blockked up to first inflation piece after the inflation, and then prevents moisture and gets into medical by-pass flow gas analysis appearance through the analysis export, reduces the influence of moisture to the follow-up analysis of medical by-pass flow gas analysis appearance.

Optionally, a limiting member for limiting the first expansion member is disposed in the casing, and a limiting space for accommodating the first expansion member is disposed between the limiting member and the end of the analysis outlet.

Through adopting above-mentioned technical scheme, the locating part has limiting displacement to first inflation piece to make first inflation piece can support tight analysis export in spacing space after taking place the inflation, reduce first inflation piece and analysis export separation and lead to the risk that moisture passes through the analysis export.

Optionally, the limiting member is fixed in the casing, and the limiting member is made of a water absorbing material, so that the limiting member can absorb water and reduce deformation of the limiting member in a humid environment.

Through adopting above-mentioned technical scheme, the locating part can absorb moisture, reduces the risk that moisture passes through the analysis export, and the shape of locating part can keep in stable in humid environment to make the locating part can provide the spacing effect of support to first inflation piece to stabilizing.

Optionally, a first partition for partitioning a space to form the filtering chamber and the water collecting chamber is arranged in the casing, and a water through hole is formed in the lower part of the first partition; the upper end and the lower end of the water through hole are respectively communicated with the filtering cavity and the water collecting cavity, and the bottom surface of the filtering cavity inclines downwards towards the direction close to the water through hole.

By adopting the technical scheme, the first partition part divides the inner space of the shell to form the filter cavity and the water collecting cavity. When water exists in the filter cavity, the water can flow to the water through holes along the inclined surface of the filter cavity in the form of liquid water and flows into the water collecting cavity from the filter cavity through the water through holes to be collected.

Optionally, the housing is provided with an exhaust outlet, and the exhaust outlet is communicated with the water collecting cavity to exhaust gas in the water collecting cavity.

Through adopting above-mentioned technical scheme, when breathing gas row analysis export, the gaseous accessible exhaust outlet discharge casing in the water-collecting cavity keeps the inside atmospheric pressure of casing stable on the one hand, prevents that the moisture in the water-collecting cavity from flowing backward and getting into the filter chamber, and on the other hand can prevent the gaseous passing through filter chamber again in the water-collecting cavity and getting into the analysis export, influences medical by-pass flow gas analysis appearance's detection precision.

Drawings

Fig. 1 is a schematic view of a state in which a moisture filter according to a first embodiment of the present invention is connected to a medical bypass gas analyzer, in which hollow arrows in fig. 1 indicate gas flow directions.

Fig. 2 is a schematic structural diagram of a moisture filter according to a first embodiment of the present application.

Fig. 3 is a view from direction a in fig. 2.

Fig. 4 is a schematic structural diagram of a warning mechanism of a moisture filter according to a second embodiment of the present application.

Fig. 5 is a schematic structural view of a warning mechanism of a moisture filter according to a third embodiment of the present application.

Fig. 6 is a schematic structural view of a warning mechanism of a moisture filter according to a fourth embodiment of the present application.

Fig. 7 is a schematic block diagram of a warning mechanism of a moisture filter according to a fifth embodiment of the present invention.

Description of reference numerals:

1. a housing; 11. a communicating cavity; 12. a filter chamber; 13. a water collection cavity; 14. a first water-proof and breathable film; 15. a support member; 16. a flow guide block; 17. a color development window; 171. a color-permeable member; 18. a limiting member; 2. an air inlet; 3. an analysis outlet; 31. a first expansion member; 4. an exhaust outlet; 41. a second water-proof and breathable film; 42. a second expansion member; 5. a medical side-stream gas analyzer; 51. an air pump; 52. a gas sensor; 6. a first separator; 61. a first separator; 62. a second separator; 621. a water through hole; 7. a second separator; 71. a communicating hole; 8. a warning mechanism; 81. a color developing member; 82. a moving member; 83. a humidity sensor; 831. a control module; 832. and a feedback module.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship, unless otherwise specified.

Embodiments of the present invention are described in further detail below with reference to figures 1-7 of the specification.

The first embodiment is as follows:

the embodiment of the application discloses moisture filter. Referring to fig. 1, the moisture filter includes a housing 1, an air inlet 2 is fixedly disposed on one side of the housing 1, and an analysis outlet 3 and an exhaust outlet 4 are fixedly disposed on one side of the housing 1 away from the air inlet 2. The air inlet 2, the analysis outlet 3 and the exhaust outlet 4 are all communicated with the inner cavity of the shell 1 so as to allow air to enter and exit the inner cavity of the shell 1. Preferably, the analysis outlet 3, the exhaust outlet 4 and the air inlet 2 are all integrally formed with the housing 1; the analysis export 3, the export 4 of exhausting and air inlet 2, the height of three diminishes in proper order, and leaves the distance between air inlet 2 and the 1 bottom of casing.

Referring to fig. 1, in actual use, the air inlet 2 is connected to the breathing mask through a hose, and the air pump 51 built in the medical bypass flow gas analyzer 5 is connected to the analysis outlet 3 and the exhaust outlet 4 through two hoses. Under the suction action of the air pump 51, the respiratory gas of the patient enters the air inlet 2 through the hose, so that the respiratory gas enters the shell 1 for moisture filtration, and then the respiratory gas is input into the medical by-pass gas analyzer 5 through the analysis outlet 3 and the hose, so as to be detected and analyzed by the gas sensor 52 in the medical by-pass gas analyzer 5; and the residual gas inside the casing 1 is discharged from the exhaust outlet 4 to the inside of the casing 1 to keep the gas pressure balance inside and outside the casing 1.

Referring to fig. 2, specifically, a first partition 6 and a second partition 7 are fixedly arranged inside the housing 1, and the first partition 6 and the second partition 7 are used for partitioning the space of the inner cavity of the housing 1 to form a plurality of chambers which have different functions and are communicated with each other. Wherein, the second separator 7 is wholly arranged in a transverse direction, the second separator 7 is positioned at the upper part of the shell 1, a distance is reserved between the upper surface of the second separator 7 and the top of the inner cavity of the shell 1 to form a communication cavity 11, and the communication cavity 11 and the analysis outlet 3. The first partition 6 includes a first partition 61 and a second partition 62, wherein the first partition 61 is disposed in a longitudinal direction as a whole, and the second partition 62 is disposed in a lateral direction as a whole; the first partition plate 61 is positioned in the middle of the shell 1, the top end of the first partition plate 61 is fixedly connected to the second partition member 7, the bottom end of the first partition plate 61 is fixedly connected to one end of the second partition plate 62, and one end of the second partition plate 62 far away from the first partition plate 61 is fixed on the cavity wall of the inner cavity of the shell 1 close to the air inlet 2; the space completed between the first partition plate 61 and the second partition plate 62 is formed with a filter chamber 12, and the intake port 2 communicates with the filter chamber 12.

Referring to fig. 1, of the spaces partitioned by the first partition 6 and the second partition 7 in the inner chamber of the casing 1, a water collection chamber 13 is formed in the remaining space except for the communication chamber 11 and the filter chamber 12, and the water collection chamber 13 communicates with the exhaust gas outlet 4. The filter chamber 12 is respectively communicated with the communicating chamber 11 and the water collecting chamber 13. In the present embodiment, the gas entering the housing 1 from the gas inlet 2 mainly leaves the housing 1 in two ways, one of which is to pass through the filtering cavity 12, the communicating cavity 11 and the analysis outlet 3 in sequence, and then input into the medical by-pass gas analyzer 5; and the second step is to pass through the filtering cavity 12, the water collecting cavity 13 and the exhaust outlet 4 in sequence and then discharge the mixture out of the shell 1.

Referring to fig. 1, in order to filter and separate moisture from respiratory gases, a first water-proof and breathable membrane 14 is fixedly installed in the filter cavity 12, and the first water-proof and breathable membrane 14 divides the space in the filter cavity 12 into a separation area and a drying area, wherein the separation area is located on one side of the filter cavity 12 close to the gas inlet 2. When the respiratory gases enter the dry region from the separation region, the first water-resistant gas-permeable membrane 14 filters and separates the moisture in the respiratory gases, so that the moisture stays in the separation region, and the drier respiratory gases enter the dry region.

Referring to fig. 2, the first water-impermeable gas-permeable membrane 14 is preferably disposed in an inclined manner as a whole, and the acute-angled opening between the first water-impermeable gas-permeable membrane 14 and the vertical plane is preferably directed upward, so that the gas passing through the first water-impermeable gas-permeable membrane 14 is more easily transported to the analysis outlet 3. The number of the first water-proof air-permeable membranes 14 is 2, a supporting piece 15 for supporting each first water-proof air-permeable membrane 14 is fixedly arranged in the filter cavity 12, and the two first water-proof air-permeable membranes 14 are respectively fixed at the upper part and the lower part of the supporting piece 15. In this embodiment, the first water-proof air-permeable membrane 14 is detachably fixed in the filter chamber 12 in a clamping manner, so that the user can replace the first water-proof air-permeable membrane 14.

Referring to fig. 2, the water filtered by the first water-stop permeable membrane 14 stays in the separation region temporarily, in order to discharge the water in the separation region in time, so as to maintain the filtering effect of the first water-stop permeable membrane 14, a water hole 621 is opened at one end of the second partition plate 62 close to the separation region, and the upper end and the lower end of the water hole 621 are respectively communicated with the filtering cavity 12 and the water collecting cavity 13, so that the liquid water in the separation region can flow into the water collecting cavity 13 to be collected. Preferably, the number of the water passage holes 621 is 2, two water passage holes 621 are spaced apart on the second partition plate 62, and one of them is located at an end portion of the second partition plate 62. In order to allow the liquid water on the second partition plate 62 to flow to the water passage hole 621 in time, the second partition plate 62 is entirely inclined downward in a direction approaching the water passage hole 621.

Referring to fig. 2, further, a plurality of flow guide blocks 16 are fixedly arranged in the drying area, a distance is reserved between each flow guide block 16 and the first water-proof breathable film 14, each flow guide block 16 is sequentially distributed at intervals along the length direction of the first water-proof breathable film 14, and a gap for breathing gas to pass through is formed between every two adjacent flow guide blocks 16.

Referring to fig. 2, the first partition plate 61 is disposed to be inclined as a whole, and the inclination direction of the first partition plate 61 matches the inclination direction of the first water-blocking and breathable membrane 14, and a distance is left between each flow guide block 16 and the first partition plate 61 to form a gap through which the breathing gas passes. One end of the second partition 7 close to the analysis outlet 3 is provided with a communication hole 71, one end of the communication hole 71 is communicated with the communication cavity 11, and the other end of the communication hole 71 is communicated with the gap between the flow guide block 16 and the first partition 61, so that the filtering strength is communicated with the communication cavity 11, and the respiratory gas in the drying area can be input into the communication cavity 11.

Referring to fig. 1 and 2, in an actual use process, if the first water-proof and breathable film 14 is too long in use time or the water in the water collecting cavity 13 is too much, a part of water may enter the communicating cavity 11 and the analysis outlet 3, at this time, a user needs to stop the water filter and check the water filter, replace the first water-proof and breathable film 14 or the water filter, and in order to prompt the user to handle the water filter, the communicating cavity 11 is provided with the warning mechanism 8 therein.

Referring to fig. 1 and 2, in the present embodiment, the warning means 8 is a color developing member 81, the surface of the color developing member 81 is made of a water-soluble material, and the color developing member 81 can change its color, preferably red, according to the change in humidity in the communication chamber 11 by utilizing the property that the water-soluble material changes color when it is exposed to water.

Referring to fig. 2 and 3, the color developing member 81 is fixedly mounted at one end of the communicating cavity 11 away from the analysis outlet 3, the color developing window 17 communicated with the communicating cavity 11 is opened at the outer side of the housing 1, the color developing window 17 is hermetically mounted with the color developing member 171, the color developing member 171 is made of a transparent material, and a user can observe the color developing member 81 through the color developing window 17 to determine whether the color of the color developing member 81 changes.

Referring to fig. 2, when the first water-impermeable and gas-permeable membrane 14 is capable of filtering moisture in respiratory gas, the humidity in the communication chamber 11 is low, and the color developing member 81 maintains its own color; when moisture still exists in the respiratory gas filtered by the first water-proof and breathable film 14, the humidity in the communicating cavity 11 is high, the color of the color developing member 81 changes due to the contact with the moisture, and a user can timely stop using the color developing member 81 or replace the moisture filter after observing that the color developing member 81 turns red.

Referring to fig. 2, a first expansion member 31 is further provided in the communication chamber 11, and the first expansion member 31 is provided at an end of the analysis outlet 3. The first swelling member 31 is made of a water-swellable material, which in this embodiment is an SAP (super absorbent resin) material, and the first swelling member 31 is preferably made of a granular SAP.

Referring to fig. 2, when the first water-impermeable and gas-permeable membrane 14 is capable of filtering moisture in respiratory gas, the moisture content in the respiratory gas is low, the first expansion member 31 does not expand, and the respiratory gas can enter the analysis outlet 3 through a gap between the first expansion member 31 and the analysis outlet 3; when moisture still exists in the respiratory gas filtered by the first water-proof and breathable membrane 14, the first expansion part 31 absorbs the moisture and expands, and the expanded first expansion part 31 blocks the analysis outlet 3 to prevent the subsequent respiratory gas with the moisture from passing through the analysis outlet 3.

Referring to fig. 2, further, a limiting member 18 is fixedly disposed in the middle of the communicating cavity 11, and a distance is left between the limiting member 18 and the analysis outlet 3 to form a limiting space for accommodating the first expansion member 31. When the first expansion member 31 expands, the stopper 18 can abut against one end of the first expansion member 31 away from the analysis outlet 3, so that the first expansion member 31 blocks the analysis outlet 3 and blocks the communication between the communication cavity 11 and the analysis outlet 3. Preferably, the first expansion member 31 is located at a position corresponding to the communication hole 71, so that the communication hole 71 can be blocked to block the communication between the filter chamber 12 and the communication chamber 11 when the first expansion member 31 is expanded.

Referring to fig. 2, in the present embodiment, the stopper 18 is preferably made of a material such as a solid water-absorbent fiber or a fine pore sintered material, and is capable of absorbing a part of water, and stably providing a supporting and stopping function while maintaining a shape in a wet environment.

Referring to fig. 2, in order to discharge moisture from the housing 1 through the exhaust outlet 4 along with the breathing gas, a second water-proof and gas-permeable membrane 41 and a second expansion member 42 are fixedly arranged at one end of the exhaust outlet 4 close to the water collecting cavity 13, and the gas in the water collecting cavity 13 passes through the second water-proof and gas-permeable membrane 41 and the second expansion member 42 in sequence before entering the exhaust outlet 4. The second water-proof and gas-permeable membrane 41 filters and separates the water in the gas, and the separated water falls into the water collecting cavity 13 for collection.

Referring to fig. 2, when the second water-impermeable gas-permeable membrane 41 is capable of filtering moisture in the gas, the moisture content in the gas is low, the second expansion member 42 does not expand, and the gas can enter the gas outlet 4 through a gap between the second expansion member 42 and the gas outlet 4; when moisture still exists in the gas filtered by the second water-proof and breathable film 41, the second expansion piece 42 absorbs the moisture and expands, and the expanded second expansion piece 42 blocks the exhaust outlet 4 to prevent the subsequent gas with the moisture from passing through the exhaust outlet 4.

The working principle of the first embodiment of the application is as follows: the respiratory gas of the patient can sequentially pass through the gas inlet 2, the filter cavity 12 and the analysis outlet 3 and then enter the medical by-pass gas analyzer 5, and when the respiratory gas passes through the filter cavity 12, the first water-proof and gas-permeable membrane 14 in the filter cavity 12 can filter the moisture in the respiratory gas, so that the respiratory gas can be separated from the moisture before entering the medical by-pass gas analyzer 5, the influence of the moisture on the detection precision of the medical by-pass gas analyzer 5 is reduced, and the accuracy of analysis and detection is improved.

Under the working state of the moisture filter, the respiratory gas enters the filter cavity 12 through the gas inlet 2 under the pumping action of the gas pump 51 of the medical by-pass gas analyzer 5, wherein part of the respiratory gas sequentially passes through the communicating cavity 11 and the analysis outlet 3 and then enters the gas sensor 52 of the medical by-pass gas analyzer 5, and the medical by-pass gas analyzer 5 analyzes the components in the respiratory gas by using the infrared spectrum analysis principle to obtain a detection result; another part of the respiratory gas enters the water collecting chamber 13 and enters the air pump 51 through the air outlet 4 together with the gas in the water collecting chamber 13

The exhaust outlet 4 can continuously exhaust the gas in the water collecting cavity 13, so that the air pressure in the inner cavity of the shell 1 is kept stable, the gas in the water collecting cavity 13 is prevented from being connected into a dry air flow channel formed between the filter cavity 12 and the communication cavity 11 again, and the analysis result of the medical side-flow gas analyzer 5 is obtained. Under the condition that liquid water in the water collecting cavity 13 is excessive, the first water-proof and air-permeable membrane 14 and the first expansion piece 31 can prevent the water from flowing backwards and passing through the filter cavity 12, and the influence of the water on the medical by-pass gas analyzer 5 is reduced. Meanwhile, the second water-stop gas-permeable membrane 41 and the second expansion member 42 can prevent moisture from entering the air pump 51 through the discharge outlet, improving safety.

In the process of continuous work of the moisture filter, the water level in the water collecting cavity 13 is continuously increased, under the extreme condition of excessive water, moisture possibly enters the communicating cavity 11 through the filter cavity 12, the color developing piece 81 gradually changes color at the moment, and a user can stop using or replace the moisture filter in time after observing the color changing state of the color developing piece 81 through the color developing window 17; at the same time, the first expansion member 31 absorbs water and expands, thereby blocking the communication between the filter chamber 12, the communication chamber 11 and the analysis outlet 3 and preventing liquid water from entering the medical bypass gas analyzer 5 through the analysis outlet 3.

Whether take place to discolour through observing the color development piece 81, the user need not operate the moisture filter and can know whether there is moisture in the intercommunication chamber 11, and is more directly perceived, quick, convenient to can handle the moisture filter in time, reduce the risk that medical by-pass flow respiration analysis appearance breaks down.

Example two:

the present embodiment is different from the first embodiment in that, referring to fig. 4, the color-permeable member 171 is made of a material that is transparent to water. When the color transmitting member 171 is in a dry environment, the color transmitting member 171 is in a translucent state, the visibility of the color developing member 81 is low, and the color developing member 81 maintains its own color; when the color transmitting member 171 is in a wet environment, the color transmitting member 171 reduces diffused reflection, the color developing member 81 has high visibility, and the color of the color developing member 81 is changed, so that a user can clearly observe the color developing member 81.

The implementation principle of the second embodiment of the present application is as follows: after moisture enters the communication cavity 11, the humidity in the communication cavity 11 becomes high, the color-permeable member 171 is in a transparent state, and a user can more clearly observe the color change of the color-developing member 81 from the color-developing window 17, and at this time, the user needs to stop using or replace the moisture filter.

Example three:

the present embodiment is different from the second embodiment in that, referring to fig. 5, the color developing member 81 is made of a material that does not change color when it encounters water.

The third embodiment of the present application has the following implementation principle: after moisture enters the communication cavity 11, the humidity in the communication cavity 11 becomes high, the color-permeable member 171 is in a transparent state, the user can clearly observe the color-developing member 81 through the color-developing window 17, and at this time, the user needs to stop using or replace the moisture filter.

Example four:

the difference between the present embodiment and the first embodiment is that, referring to fig. 6, the limiting member 18 is disposed in the communication chamber 11, the warning mechanism 8 is a moving member 82, the moving member 82 is mounted in the communication chamber 11, the moving member 82 is disposed between the first expansion member 31 and the color-permeable member 171, and a distance is left between the color-permeable member 171 and the moving member 82. When the first expansion member 31 absorbs water and expands, the first expansion member 31 pushes the moving member 82 to move, so that the moving member 82 gradually approaches the color-transmitting member 171.

The implementation principle of the fourth embodiment of the present application is as follows: after moisture enters the communication cavity 11, the humidity in the communication cavity 11 becomes high, the first expansion part 31 absorbs water and expands to drive the moving part 82 to displace, the user can observe the moving part 82 from the color development window 17, and when the moving part 82 is close to the color transparent part 171, the user needs to stop or replace the moisture filter.

Example five:

the difference between the first embodiment and the second embodiment is that, referring to fig. 7, the warning mechanism 8 includes a humidity sensor 83, a control module 831 and a feedback module 832, and the control module 831 is electrically connected to the humidity sensor 83 and the feedback module 832, respectively. The feedback module 832 may be a whistle module, an LED module, or a wireless communication module capable of sending a signal to the remote intelligent terminal to enable the remote intelligent terminal to display warning information.

The implementation principle of the fifth embodiment of the present application is as follows: after moisture enters the communication cavity 11, the humidity in the communication cavity 11 increases, the humidity sensor 83 sends a detection signal to the control module 831, and the control module 831 sends a control signal to the feedback, so that the corresponding feedback module 832 gives an alarm to remind a user of stopping or replacing the moisture filter.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. A moisture filter, comprising:

a housing (1);

an air inlet (2) arranged in the shell (1) and used for inputting respiratory gas into the shell (1);

an analysis outlet (3) arranged in the housing (1) for the output of breathing gas;

the filter cavity (12) is arranged in the shell (1), the air inlet (2), the filter cavity (12) and the analysis outlet (3) are sequentially communicated so as to allow the respiratory gas to pass through, and a first water-proof and air-permeable membrane (14) used for filtering the moisture in the respiratory gas is arranged in the filter cavity (12);

the water collecting cavity (13) is arranged in the shell (1) and communicated with the lower part of the filter cavity (12) and is used for collecting the water filtered by the first water-proof breathable film (14).

2. The moisture filter of claim 1, wherein: the device is characterized in that a communicating cavity (11) is arranged in the shell (1), the communicating cavity (11) is communicated between the analysis outlet (3) and the filtering cavity (12), and the communicating cavity (11) is provided with a warning mechanism (8) which can feed back according to the humidity in the communicating cavity (11).

3. The moisture filter of claim 2, wherein: the warning mechanism (8) comprises a color developing part (81) capable of changing color based on humidity change in the communication cavity (11), and the shell (1) is provided with a color developing window (17) for a user to observe the color developing part (81).

4. The moisture filter of claim 2, wherein: warning mechanism (8) are including development (81), casing (1) is provided with and supplies the user to observe development window (17) of development (81), development window (17) are provided with and can be based on humidity change in the intercommunication chamber (11) and change transparency's permeable member (171).

5. The moisture filter of claim 2, wherein: the warning mechanism (8) comprises a moving member (82) capable of sliding in the communicating cavity (11) and a first expansion member (31) capable of deforming based on humidity in the communicating cavity (11), and the shell (1) is provided with a color development window (17) for a user to observe the moving member (82);

the first expansion piece (31) can expand after absorbing moisture so as to abut against the moving piece (82) and enable the moving piece (82) to move in the communication cavity (11).

6. The moisture filter of claim 1, wherein: the analysis outlet (3) is provided with a first swelling member (31), the first swelling member (31) being capable of swelling upon absorption of moisture to block the analysis outlet (3).

7. The moisture filter of claim 6, wherein: the shell (1) is internally provided with a limiting piece (18) used for limiting the first expansion piece (31), and a limiting space for accommodating the first expansion piece (31) is arranged between the limiting piece (18) and the end part of the analysis outlet (3).

8. The moisture filter of claim 7, wherein: the limiting part (18) is fixed in the shell (1), and the limiting part (18) is made of a water absorbing material, so that the limiting part (18) can absorb water and reduce the deformation of the limiting part (18) in a humid environment.

9. The moisture filter of claim 1, wherein: a first partition (6) for separating a space to form the filtering cavity (12) and the water collecting cavity (13) is arranged in the shell (1), and a water through hole (621) is formed in the lower portion of the first partition (6); the upper end and the lower end of the water through hole (621) are respectively communicated with the filtering cavity (12) and the water collecting cavity (13), and the bottom surface of the filtering cavity (12) is inclined downwards towards the direction close to the water through hole (621).

10. The moisture filter of claim 1, wherein: the shell (1) is provided with an exhaust outlet (4), and the exhaust outlet (4) is communicated with the water collecting cavity (13) for discharging gas in the water collecting cavity (13).

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