Breathing filtering device and expiration equipment

Abstract

The utility model provides a breathing filtering device and expiration equipment, and relates to the technical field of breathing equipment, and the breathing filtering device comprises a first shell, a second shell, a filtering assembly and a breathing valve assembly. The first shell is provided with a breathing part; the second shell is connected with the first shell and defines a cavity, and the cavity is communicated with the breathing part; the filtering assembly is arranged in the cavity; the breather valve assembly is connected with the second shell and communicates with the cavity, the air outlet channel is provided with a first check valve, and the air inlet channel is provided with a second check valve. The structure of the breathing filtering device is improved, the breathing part is arranged to be in contact with the oral cavity of the patient, filtering is achieved in the breathing process of the patient through the filtering assembly, the air outlet channel is provided with the first check valve to achieve one-way expiration, and the air inlet channel is provided with the second check valve to achieve one-way inspiration. The inlet and outlet direction of breathing gas is controlled, and the risk of cross infection between users is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of breathing equipment, in particular to a breathing filter device and an exhalation device. Background Art

[0002] Respiratory equipment is a medical device used for respiratory management, respiratory support therapy and respiratory gas detection of patients. It is usually necessary to filter the patient's breathing process to prevent the risk of cross-infection between patients. Most of the respiratory filters currently used on the market only filter through filter elements, and there is still a risk of cross-infection. Respiratory filters are usually equipped with a reusable handle that is connected to the detection equipment. To further reduce the risk of cross-infection, some companies have installed a device on the handle to prevent the exhaled air that has entered the device from being sucked back into the filter. However, this method cannot solve the risk of contaminated gas that may exist on the handle connector being inhaled into the patient's mouth. Utility Model Content

[0003] The purpose of the utility model is to provide a breathing filter device and an exhalation device, to improve the structure, to achieve filtering during the patient's breathing process, to control the inlet and outlet directions of the breathing gas, and to reduce the risk of cross infection between users.

[0004] A first aspect of the utility model provides a breathing filter device, which comprises a first shell, a second shell, a filter assembly and a breathing valve assembly.

[0005] The first shell is provided with a breathing part;

[0006] a second shell, the second shell being connected to a side of the first shell away from the breathing part and defining a cavity, the cavity being in communication with the breathing part;

[0007] A filter assembly, wherein the filter assembly is disposed in the cavity;

[0008] A breathing valve assembly is arranged in the cavity, and the breathing valve assembly is connected to the second shell to form an air outlet channel and an air inlet channel. The air outlet channel is provided with a first check valve, and the air inlet channel is provided with a second check valve.

[0009] In a possible embodiment of the utility model, the second shell is provided with a first air outlet and a first air inlet, the breathing valve assembly is provided with a second air outlet and a second air inlet, one first air outlet is provided corresponding to one second air outlet, and one first air inlet is provided corresponding to one second air inlet.

[0010] In a possible embodiment of the present invention, a first limiting rib is provided on a side of the first air outlet close to the second air outlet, and the first check valve is provided between the first limiting rib and the second air outlet.

[0011] In a possible embodiment of the utility model, the first air outlet is located on one side of the first limiting rib to form a first arcuate groove, and the second air outlet is located on a side close to the first air outlet to form a second arcuate groove, the first arcuate groove and the second arcuate groove are arranged opposite to each other, and the air outlet direction of the air outlet channel is the same as the bottom direction of the first arcuate groove.

[0012] In a possible embodiment of the present invention, a second limiting rib is provided on a side of the second air inlet close to the first air inlet, and the second check valve is provided between the second limiting rib and the first air inlet.

[0013] In a possible embodiment of the utility model, a third arc-shaped groove is formed on the side of the first air inlet close to the second air inlet, and a fourth arc-shaped groove is formed on the side of the second air inlet located at the second limiting rib, the third arc-shaped groove and the fourth arc-shaped groove are arranged opposite to each other, and the air intake direction of the air inlet channel is the same as the bottom direction of the fourth arc-shaped groove.

[0014] In a possible embodiment of the present invention, both the first check valve and the second check valve are diaphragm check valves.

[0015] In a possible embodiment of the present invention, there are multiple air inlet channels, and the multiple air inlet channels are arranged around the circumference of the air outlet channel.

[0016] In a possible embodiment of the present invention, the filter assembly includes a filter core and a filter membrane, and the filter membrane is located between the filter core and the breathing valve assembly.

[0017] A second aspect of the present invention provides an exhalation device, comprising the respiratory filter device described in any one of the above embodiments.

[0018] Compared with the prior art, the beneficial effects of the utility model are as follows: the respiratory filter device and exhalation equipment provided by the utility model improve the structure of the respiratory filter device, and a respiratory part is provided for contacting the patient's oral cavity, and filtering is achieved during the patient's breathing process through a filter component. A first check valve is provided in the air outlet channel for one-way exhalation, and a second check valve is provided in the air inlet channel for one-way inhalation, thereby controlling the inlet and outlet direction of the respiratory gas and reducing the risk of cross infection between users. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the breathing filter device provided in some embodiments of the utility model;

[0021] Figure 2 A cross-sectional view of a respiratory filter device provided in some embodiments of the present invention Figure 1 ;

[0022] Figure 3 A cross-sectional view of a respiratory filter device provided in some embodiments of the present invention Figure 2 ;

[0023] Figure 4 A top view of a second housing of a respiratory filter device provided in some embodiments of the present invention;

[0024] Figure 5 It is a schematic diagram of the three-dimensional structure of the second housing of the breathing filter device provided in some embodiments of the utility model;

[0025] Figure 6 It is a top view of a breathing valve assembly of a breathing filter device provided in some embodiments of the present utility model.

[0026] Description of main component symbols;

[0027] 100-breathing filter device; 110-first shell; 111-breathing part; 112-side wall; 120-second shell; 121-first air outlet; 1211-first arc-shaped groove; 122-first air inlet; 1221-third arc-shaped groove; 123-first limiting rib; 124-limiting boss; 130-filter assembly; 131-filter element; 132-filter membrane; 140-breathing valve assembly; 141-first check valve; 142-second check valve; 143-second air outlet; 1431-second arc-shaped groove; 144-second air inlet; 1441-fourth arc-shaped groove; 145-second limiting rib; 150-cavity; 151-air outlet channel; 1511-connecting part; 152-air inlet channel. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0032] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0035] Example 1

[0036] refer to Figure 1 and Figure 2 As shown, an embodiment of the present application provides a breathing filter device 100 , which includes a first housing 110 , a second housing 120 , a filter assembly 130 and a breathing valve assembly 140 .

[0037] Specifically, Figure 2 As shown, the first shell 110 is provided with a breathing portion 111; the second shell 120 is connected to the side of the first shell 110 away from the breathing portion 111 and defines a cavity 150, and the cavity 150 is communicated with the breathing portion 111; the filter assembly 130 is arranged in the cavity 150; the breathing valve assembly 140 is arranged in the cavity 150, and the breathing valve assembly 140 is connected to the second shell 120 and forms an air outlet channel 151 and an air inlet channel 152, and the air outlet channel 151 is provided A first check valve 141 is provided, and the air inlet channel 152 is provided with a second check valve 142. The second shell 120 is installed with the first shell 110. The breathing part 111 is provided for contacting the patient's mouth. The filtering component 130 is used to achieve filtering during the patient's breathing process. The air outlet channel 151 is provided with a first check valve 141 for one-way exhalation, and the air inlet channel 152 is provided with a second check valve 142 for one-way inhalation, so as to control the inlet and outlet direction of the breathing gas and reduce the risk of cross infection between users.

[0038] In one embodiment, in combination Figure 4 and Figure 5As shown, specifically, the second shell 120 is provided with a first air outlet 121 and a first air inlet 122, the breathing valve assembly 140 is provided with a second air outlet 143 and a second air inlet 144, one of the first air outlets 121 corresponds to one of the second air outlets 143, one of the first air inlet 122 corresponds to one of the second air inlet 144, and accordingly, the air outlet channel 151 corresponds to the first air outlet 121 and the second air outlet 143, and the air inlet channel 152 corresponds to the first air inlet The first check valve 141, the first air outlet 121 and the second air outlet 143 are used for one-way exhalation. When exhaling, the air flow direction is opposite to the air intake direction of the air inlet channel 152. At this time, the air inlet channel 152 is in a closed state. Accordingly, the air inlet channel 152 is used for one-way inhalation through the second check valve 142, the first air inlet 122 and the second air inlet 144. At this time, the air outlet channel 151 is in a closed state, which will not be repeated here.

[0039] Specifically, the first check valve 141 and the second check valve 142 are both diaphragm check valves. It should be noted that the diaphragm check valve is referred to as a diaphragm valve, which is a valve used in gas systems. Exemplarily, the diaphragm check valve is deformed under the action of airflow. When the diaphragm check valve is installed on the arc-shaped first limiting rib 123 or the arc-shaped second limiting rib 145, the deformed diaphragm check valve can be matched with the arc-shaped structure of the rib to achieve a better airflow effect; on the contrary, when the deformed diaphragm check valve can be matched with the structure of the third arc-shaped groove 1221 and the second arc-shaped groove 1431, a better sealing effect can be achieved.

[0040] Specifically, Figure 1 As shown, there are multiple air inlet channels 152, and the multiple air inlet channels 152 are arranged around the circumference of the air outlet channel 151. Exemplarily, there are six air inlet channels 152, and there is one air outlet channel 151, and one air outlet channel 151 is arranged at the center position of the second shell 120, and six air inlet channels 152 are arranged around the circumference of one air outlet channel 151, and the six air inlet channels 152 are arranged at intervals.

[0041] Specifically, the filter assembly 130 includes a filter core 131 and a filter membrane 132. The filter membrane 132 is located between the filter core 131 and the breathing valve assembly 140. The filter core 131 is limited and fixed by the filter membrane 132. During the breathing process, the gas entering the oral cavity is first filtered through the filter core 131 and the filter membrane 132, and the residual particles, residues, etc. in the gas are adsorbed and filtered to improve the purity of the gas.

[0042] In summary, the structure of the breathing filter device 100 is improved, the second shell 120 is installed with the first shell 110, and the breathing part 111 is provided for contacting the patient's mouth. The filtering component 130 is used to achieve filtering during the patient's breathing process. The air outlet channel 151 is provided with a first check valve 141 for one-way exhalation, and the air inlet channel 152 is provided with a second check valve 142 for one-way inhalation, thereby controlling the inlet and outlet direction of the breathing gas and reducing the risk of cross infection between users.

[0043] Example 2

[0044] refer to Figure 1 As shown, an embodiment of the present application provides another breathing filter device 100 , which includes a first housing 110 , a second housing 120 , a filter assembly 130 and a breathing valve assembly 140 .

[0045] Specifically, Figure 2 As shown, the first shell 110 is provided with a breathing portion 111 ; the second shell 120 is connected to a side of the first shell 110 away from the breathing portion 111 and defines a cavity 150 , and the cavity 150 is communicated with the breathing portion 111 ; the filter assembly 130 is disposed in the cavity 150 .

[0046] Specifically, the breathing valve assembly 140 is arranged in the cavity 150, and the breathing valve assembly 140 is connected to the second shell 120 to form an air outlet channel 151 and an air inlet channel 152. The air outlet channel 151 is provided with a first check valve 141, and the air inlet channel 152 is provided with a second check valve 142. The second shell 120 is installed with the first shell 110, and the breathing part 111 is provided for contacting the patient's mouth. The filtering component 130 is used to achieve filtering during the patient's breathing process. The air outlet channel 151 is provided with a first check valve 141 for one-way exhalation, and the air inlet channel 152 is provided with a second check valve 142 for one-way inhalation, thereby reducing the risk of cross infection between users and controlling the inlet and outlet direction of the breathing gas.

[0047] In one embodiment, in combination Figure 2 and Figure 3As shown, specifically, the second shell 120 is provided with a first air outlet 121 and a first air inlet 122, and the breathing valve assembly 140 is provided with a second air outlet 143 and a second air inlet 144. One first air outlet 121 corresponds to one second air outlet 143, and one first air inlet 122 corresponds to one second air inlet 144. Correspondingly, the air outlet channel 151 corresponds to the first air outlet 121 and the second air outlet 143, and the air inlet channel 152 corresponds to the first air inlet 122 and the second air inlet 144. The air outlet channel 151 is used for one-way exhalation through the first check valve 141, the first air outlet 121 and the second air outlet 143; the air inlet channel 152 is used for one-way inhalation through the second check valve 142, the first air inlet 122 and the second air inlet 144.

[0048] Optionally, combined Figure 3 and Figure 4 As shown, a first limiting rib 123 is provided on a side of the first air outlet 121 close to the second air outlet 143, and the first check valve 141 is provided between the first limiting rib 123 and the second air outlet 143. Further, a first arc groove 1211 is formed on a side of the first limiting rib 123 of the first air outlet 121, and a second arc groove 1431 is formed on a side of the second air outlet 143 close to the first air outlet 121, the first arc groove 1211 and the second arc groove 1431 are arranged opposite to each other, and the air outlet direction of the air outlet channel 151 is the same as the groove bottom direction of the first arc groove 1211, so that the air outlet channel 151 has a small resistance to the airflow, improves the smoothness of the airflow path during exhalation, and makes the airflow path of the air outlet channel 151 smooth when exhaling.

[0049] Demonstration, combined Figure 5 and Figure 6 As shown, the first limiting rib 123 is arranged on the first air outlet 121 of the second shell 120, the first arc groove 1211 and the corresponding second arc groove 1431 form a first accommodation space, the first limiting rib 123 is arranged on the first arc groove 1211 and is located in the first accommodation space, the first check valve 141 is installed between the first limiting rib 123 and the second arc groove 1431 of the second air outlet 143, and the first limiting rib 123 can be used to support the first check valve 141; the first accommodation space The first check valve 141 can have a certain movable space between the first limiting rib 123 and the second arc groove 1431 of the second air outlet 143. The first check valve 141 has the function of one-way air flow to prevent external gas from flowing back through the air outlet channel 151. The first arc groove 1211 and the second arc groove 1431 can both be arc-shaped. The first check valve 141 can better fit with the second arc groove 1431 of the second air outlet 143, thereby having a better sealing effect.

[0050] Optionally, combined Figure 3 and Figure 5 As shown, a second limiting rib 145 is provided on the side of the second air inlet 144 close to the first air inlet 122, and the second check valve 142 is provided between the second limiting rib 145 and the first air inlet 122. Further, a third arc groove 1221 is formed on the side of the first air inlet 122 close to the second air inlet 144, and a fourth arc groove 1441 is formed on the side of the second air inlet 144. The third arc groove 1221 and the fourth arc groove 1441 are arranged opposite to each other, and the air outlet direction of the air inlet channel 152 is the same as the bottom direction of the third arc groove 1221, and the air flow path is unobstructed when air is inhaled through the air inlet channel 152.

[0051] Demonstration, combined Figure 4 and Figure 5 As shown, the second limiting rib 145 is arranged on the second air inlet 144 of the breathing valve assembly 140, the third arc groove 1221 and the corresponding fourth arc groove 1441 are arranged to form a second accommodating space, the second limiting rib 145 is arranged on the third arc groove 1221 and is located in the second accommodating space, the second check valve 142 is installed between the second limiting rib 145 and the fourth arc groove 1441 of the second air inlet 144, the second limiting rib 145 can be used to support the second check valve 142, and improve the smoothness of the airflow path during the inhalation process; the second check valve 142 has a certain movable space in the second accommodating space, the third arc groove 1221 and the fourth arc groove 1441 can both be arc-shaped, the second check valve 142 can better fit with the fourth arc groove 1441 of the second air inlet 144, and has a better sealing effect, and the second check valve 142 prevents the reverse airflow from flowing out to the equipment handle connector during inhalation.

[0052] Specifically, the first check valve 141 and the second check valve 142 are both diaphragm check valves. It should be noted that the diaphragm check valve is referred to as a diaphragm valve, which is a valve used in gas systems. Exemplarily, the diaphragm check valve is deformed under the action of airflow. When the diaphragm check valve is installed on the arc-shaped first limiting rib 123 or the arc-shaped second limiting rib 145, the deformed diaphragm check valve can be matched with the arc-shaped structure of the rib to achieve a better airflow effect; on the contrary, when the deformed diaphragm check valve can be matched with the third arc-shaped groove 1221 and the second arc-shaped groove 1431 structure, a better sealing effect can be achieved.

[0053] Specifically, Figure 1As shown, there are multiple air inlet channels 152, and the multiple air inlet channels 152 are arranged in a circumferential direction of the air outlet channel 151. Exemplarily, there are six air inlet channels 152, and there is one air outlet channel 151, and one air outlet channel 151 is arranged at the center position of the second shell 120, and six air inlet channels 152 are arranged in a circumferential direction of one air outlet channel 151, and the six air inlet channels 152 are arranged at intervals.

[0054] In one embodiment, optionally, in combination Figure 1 and Figure 2 As shown, the second shell 120 is sleeved on the first shell 110, and the second shell 120 covers the side wall surface 112 of the first shell 110. Accordingly, the two can also be threadedly connected so that the second shell 120 is sleeved on the first shell 110. Of course, the installation and connection method of the second shell 120 and the first shell 110 is not limited here. There can be a variety of connection and installation methods. The first shell 110 can also be sleeved on the second shell 120, or the second shell 120 and the first shell 110 are connected by interference, or the second shell 120 and the first shell 110 are connected by welding, etc.

[0055] Alternatively, if Figure 2 As shown, the second shell 120 is provided with a limiting boss 124, and the breathing valve assembly 140 abuts between the limiting boss 124 and the filter assembly 130. It can be understood that the second shell 120 can limit the breathing valve assembly 140 through the limiting boss 124 so that the edge position of the breathing valve assembly 140 abuts against the limiting boss 124.

[0056] In one embodiment, optionally, the second shell 120 can be detachably connected to the exhalation device, and accordingly, the outer periphery of the second shell 120 can be provided with a threaded structure, so that the second shell 120 can be detachably connected to the relevant parts of the exhalation device, and the outer periphery of the second shell 120 can also be connected to the exhalation device by means of an interference connection. Further, the air outlet channel 151 of the second shell 120 is provided with a connecting portion 1511, and the air outlet channel 151 can be detachably connected to the exhalation device by means of the connecting portion 1511, and a sealing member can be provided between the connecting portion 1511 and the exhalation device, and the two can also be in an interference connection manner, so that a sealing structure is formed between the air outlet channel 151 and the exhalation device.

[0057] In one embodiment, specifically, the filter assembly 130 includes a filter core 131 and a filter membrane 132. The filter membrane 132 is located between the filter core 131 and the breathing valve assembly 140. The filter core 131 is limited and fixed by the filter membrane 132. During the breathing process, the gas entering the oral cavity is first filtered through the filter core 131 and the filter membrane 132, and the residual particles, residues, etc. in the gas are adsorbed and filtered to improve the purity of the gas.

[0058] Example 3

[0059] An embodiment of the utility model also provides an exhalation device, which may be an exhalation analysis device or an exhalation detection device. The exhalation device includes the respiratory filter device 100 in Example 1 or Example 2. The exhalation device including the respiratory filter device 100 has all the beneficial effects of the respiratory filter device 100, which will not be described in detail here.

[0060] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limiting, and thus other examples of the exemplary embodiments may have different values.

[0061] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention.

Claims

1. A breathing filter device, characterized in that: include: The first shell is provided with a breathing part; a second shell, the second shell being connected to a side of the first shell away from the breathing part and defining a cavity, the cavity being in communication with the breathing part; A filter assembly, wherein the filter assembly is disposed in the cavity; A breathing valve assembly is arranged in the cavity, and the breathing valve assembly is connected to the second shell to form an air outlet channel and an air inlet channel. The air outlet channel is provided with a first check valve, and the air inlet channel is provided with a second check valve.

2. The breathing filter device according to claim 1, characterized in that: The second shell is provided with a first air outlet and a first air inlet, the breathing valve assembly is provided with a second air outlet and a second air inlet, one first air outlet is provided corresponding to one second air outlet, and one first air inlet is provided corresponding to one second air inlet.

3. The breathing filter device according to claim 2, characterized in that: A first limiting rib is disposed on a side of the first air outlet close to the second air outlet, and the first check valve is disposed between the first limiting rib and the second air outlet.

4. The breathing filter device according to claim 3, characterized in that: The first air outlet is located on one side of the first limiting rib to form a first arc groove, and the second air outlet is located on a side close to the first air outlet to form a second arc groove. The first arc groove and the second arc groove are arranged opposite to each other, and the air outlet direction of the air outlet channel is the same as the bottom direction of the first arc groove.

5. The breathing filter device according to claim 2, characterized in that: A second limiting rib is disposed on a side of the second air inlet close to the first air inlet, and the second check valve is disposed between the second limiting rib and the first air inlet.

6. The breathing filter device according to claim 5, characterized in that A third arc groove is formed on the side of the first air inlet close to the second air inlet, and a fourth arc groove is formed on the side of the second air inlet located at the second limiting rib. The third arc groove and the fourth arc groove are arranged opposite to each other, and the air intake direction of the air inlet channel is the same as the bottom direction of the fourth arc groove.

7. The breathing filter device according to any one of claims 1 to 6, characterized in that: The first check valve and the second check valve are both diaphragm check valves.

8. The breathing filter device according to any one of claims 1 to 6, characterized in that: There are multiple air inlet passages, and the multiple air inlet passages are arranged around the circumference of the air outlet passage.

9. The breathing filter device according to any one of claims 1 to 6, characterized in that: The filter assembly comprises a filter core and a filter membrane, and the filter membrane is located between the filter core and the breathing valve assembly.

10. An exhalation device, characterized in that: A breathing filter device comprising any one of claims 1 to 9.

Images