Heat and moisture exchange filter

Abstract

The heat and humidity exchange filter comprises a first shell, a second shell and a filter element assembly, the first shell and the second shell are connected in a sealed mode through a first layer of sealing structure, and the filter element assembly is arranged in a sealed cavity formed by the first shell and the second shell; the first shell and / or the second shell are / is in sealed connection with the filter element assembly through a second-layer sealing structure, and the first-layer sealing structure is located on the outer side of the second-layer sealing structure. Through the arrangement of the first-layer sealing structure and the second-layer sealing structure, the first shell and the second shell are in sealed connection through the first-layer sealing structure, the first shell and / or the second shell are / is in sealed connection with the filter element assembly through the second-layer sealing structure, and the first-layer sealing structure is located on the outer side of the second-layer sealing structure; therefore, an inner-layer sealing structure and an outer-layer sealing structure are formed in the first shell and the second shell and are used for improving the leakproofness of the heat and humidity exchange filter and reducing the infection risk of a patient.

Description

Technical Field

[0001] The present application relates to the technical field of medical filters, and in particular to heat and moisture exchange filters. Background Art

[0002] The HMEF, also known as the artificial nasal breathing filter, is an artificial substitute device made by simulating the mechanism of the human anatomical humidification and heating system. It is mainly used for the anesthesia of surgical patients, the filtering of oxygen during breathing, fine particles in the anesthetic gas, and viruses, and the regulation of the temperature and humidity of the exhaled gas. The disposable HMEF collects and utilizes the heat and water vapor in the exhaled gas to warm and humidify the inhaled gas, and has the function of filtering bacteria and dust particles, acting as an effective barrier to prevent cross infection that may occur in the clinical environment, and regulating and maintaining the temperature and humidity of the exhaled gas.

[0003] In the related art, since the shell of the heat and moisture exchanger generally includes a first shell and a second shell, the first shell and the second shell are connected to each other to form a closed shell.

[0004] However, since it is difficult to achieve sealing at the connection position between the first shell and the second shell, air leakage is likely to occur, increasing the risk of infection for the patient. Summary of the invention

[0005] Based on this, it is necessary to provide a heat and moisture exchange filter to address the problem that it is difficult to achieve sealing at the connection position between the first shell and the second shell.

[0006] A heat and moisture exchange filter, the heat and moisture exchange filter comprises a first shell, a second shell and a filter element assembly, the first shell is sealed and connected to the second shell through a first layer of sealing structure, the filter element assembly is arranged in a closed cavity formed by the first shell and the second shell, and the first shell and / or the second shell is sealed and connected to the filter element assembly through a second layer of sealing structure, and the first layer of sealing structure is located on the outside of the second layer of sealing structure.

[0007] In one embodiment, the first layer sealing structure includes a first groove and a first protrusion sealingly matched with the first groove, the first protrusion is provided on one of the first shell and the second shell, and the first groove is provided on the other.

[0008] In one of the embodiments, the filter element assembly includes a bracket and a filter element disposed on the bracket, one end of the bracket is abutted against the first shell, and the other end is used to be connected to the second shell through the second layer sealing structure.

[0009] In one embodiment, the second layer sealing structure includes a second groove and a second protrusion sealingly matched with the second groove, and the second protrusion is provided on one of the bracket and the second shell, and the second groove is provided on the other.

[0010] In one of the embodiments, the second protrusion is disposed in the second shell, and the second protrusion is an annular structure coaxial with the second shell; and the bracket is provided with an annular second groove.

[0011] In one embodiment, the sealing height of the second sealing structure is greater than the sealing height of the first sealing structure.

[0012] In one embodiment, the first groove has an inner wall and an outer wall for forming an annular groove, and the distance between the inner wall and the outer wall gradually decreases along the direction from the groove opening to the groove bottom.

[0013] In one embodiment, the first sealing structure includes a welding layer, and the first shell and the second shell are connected via the welding layer.

[0014] In one of the embodiments, the heat and moisture exchange filter includes a humidifying medium, and the humidifying medium is disposed in the sealed cavity and is located on a side of the filter element assembly close to the second shell.

[0015] In one embodiment, the HMEF includes a sticky note, and the sticky note is attached to the outside of the connection position between the first shell and the second shell.

[0016] The above-mentioned heat and moisture exchange filter is provided with a first layer sealing structure and a second layer sealing structure. The first shell and the second shell are sealed connected by the first layer sealing structure. The first shell and / or the second shell and the filter element assembly are sealed connected by the second layer sealing structure, and the first layer sealing structure is located on the outside of the second layer sealing structure, thereby forming an inner and outer two-layer sealing structure in the first shell and the second shell. The two-layer sealing structure is used to increase the airtightness of the heat and moisture exchange filter and reduce the infection risk of the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG. 1 is a schematic diagram of the internal structure of a heat and moisture exchange filter in one embodiment.

[0018] FIG. 2 is a schematic diagram of the exploded structure of a heat and moisture exchange filter in one embodiment.

[0019] FIG. 3 is a schematic diagram of the structure of point A in FIG. 1 .

[0020] Figure numerals: 10, first layer sealing structure; 20, second layer sealing structure; 100, first shell; 110, first groove; 111, inner wall; 112, outer wall; 120, air inlet; 200, second shell; 210, first protrusion; 220, second protrusion; 230, air outlet; 300, filter element assembly; 310, filter element; 320, bracket; 321, second groove; 400, humidifying medium; 500, sticky note; 600, cover. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0022] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application 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 application.

[0023] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0024] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0025] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0027] Referring to Figures 1 and 2, a heat and moisture exchange filter provided in an embodiment of the present application includes a first shell 100, a second shell 200 and a filter element assembly 300. The first shell 100 and the second shell 200 are sealed and connected by a first sealing structure 10. The filter element assembly 300 is arranged in a closed cavity formed by the first shell 100 and the second shell 200, and the first shell 100 and / or the second shell 200 are sealed and connected with the filter element assembly 300 by a second sealing structure 20. The first sealing structure 10 is located on the outside of the second sealing structure 20.

[0028] Among them, the sealing connection between the first shell 100 and / or the second shell 200 and the filter element assembly 300 through the second layer sealing structure 20 can be understood as: the filter element assembly and the first shell are sealed connected through the second layer sealing structure, or the filter element assembly 300 and the second shell 200 are sealed connected through the second layer sealing structure 20, or the first shell and the second shell are sealed connected to the filter element assembly through the second layer sealing structure 20 at the same time.

[0029] In this embodiment, through the provision of the first layer sealing structure 10 and the second layer sealing structure 20, the first shell 100 and the second shell 200 are sealed connected through the first layer sealing structure 10, the first shell 100 and / or the second shell 200 and the filter element assembly 300 are sealed connected through the second layer sealing structure 20, and the first layer sealing structure 10 is located on the outside of the second layer sealing structure 20, thereby forming an inner and outer two-layer sealing structure in the first shell 100 and the second shell 200, and the two-layer sealing structure is used to increase the airtightness of the heat and moisture exchange filter and reduce the infection risk of the patient.

[0030] In some embodiments, in conjunction with FIG3 , the first layer sealing structure 10 includes a first groove 110 and a first protrusion 210 that seals with the first groove 110. The first protrusion 210 is disposed on one of the first shell 100 and the second shell 200, and the first groove 110 is opened on the other. When the first protrusion 210 extends into the first groove 110, the first protrusion 210 can seal with the first groove 110, so that the first shell 100 and the second shell 200 are sealed and connected.

[0031] Furthermore, the first groove 110 has an inner wall 111 and an outer wall 112 for forming an annular groove, and the distance between the inner wall 111 and the outer wall 112 gradually decreases along the direction from the groove opening to the groove bottom. That is, when the first protrusion 210 extends into the first groove 110, the distance between the inner wall 111 and the outer wall 112 of the first groove 110 gradually decreases, so that the first protrusion 210 can be clamped with the first groove 110, so that the first protrusion 210 can be sealed and matched with the first groove 110.

[0032] Specifically, in order to further enhance the sealing fit between the first protrusion and the first groove, a sealing gasket may be sleeved on the first protrusion first, and then the first protrusion may be extended into the first groove.

[0033] Of course, in other embodiments, the first protrusion and the first groove may be interference fit to achieve a sealed fit between the two.

[0034] In some embodiments, a first protrusion is disposed on the first shell, and a first groove is formed on the second shell.

[0035] In some other embodiments, the second shell 200 may be provided with a first protrusion 210 , and the first shell 100 may be provided with a first groove 110 .

[0036] 3 , in some embodiments, the filter element assembly 300 includes a bracket 320 and a filter element 310 disposed on the bracket 320, one end of the bracket 320 abuts against the first housing 100, and the other end is connected to the second housing 200 through the second sealing structure 20. The abutment of the first housing 100 against one end of the bracket 320 can further increase the sealing connectivity between the other end of the bracket 320 and the second housing 200.

[0037] Likewise, in some other embodiments, one end of the bracket may abut against the second shell, and the other end may be connected to the first shell via the second sealing structure.

[0038] Of course, in some other embodiments, the two ends of the bracket may be connected to the first shell and the second shell respectively through the second layer of sealing structure.

[0039] In some embodiments, the second sealing structure 20 includes a second groove 321 and a second protrusion 220 sealingly matched with the second groove 321. The second protrusion 220 is provided on one of the bracket 320 and the second shell 200, and the second groove 321 is opened on the other.

[0040] In some embodiments, in conjunction with FIG. 1 and FIG. 3 , a second groove 321 is provided on the bracket 320, and a second protrusion 220 is provided on the second housing 200. Specifically, the second protrusion 220 is an annular structure coaxial with the second housing 200; an annular second groove 321 is provided on the bracket 320. When the bracket 320 is installed, the annular second protrusion 220 is inserted into the annular second groove 321. In order to further increase the sealing between the two, a gasket can be sleeved on the second protrusion 220.

[0041] The second protrusion 220 can be integrally formed with the second shell 200 or the second protrusion 220 can be welded inside the second shell 200 .

[0042] In some other embodiments, a second protrusion is provided on the bracket, and a second groove is provided on the second shell.

[0043] In some embodiments, with reference to FIG. 1 , the sealing height of the second sealing structure 20 is greater than the sealing height of the first sealing structure 10 .

[0044] In this embodiment, on the basis of providing two layers of sealing structures, the sealing height of the second layer of sealing structure 20 is further increased, that is, the sealing effect of the sealing cavity can be further improved.

[0045] Specifically, the groove depth of the second groove 321 is greater than the groove depth of the first groove 110 , and the depth of the second protrusion 220 extending into the second groove 321 is greater than the depth of the first protrusion 210 extending into the first groove 110 .

[0046] Furthermore, the first sealing structure 10 includes a welding layer, and the first shell 100 and the second shell 200 are connected by the welding layer. Specifically, the outer wall 112 of the first groove 110 is connected to the second shell 200 by laser welding, thereby further improving the sealing of the connection between the first shell 100 and the second shell 200.

[0047] In some embodiments, the HME filter includes a humidifying medium 400, which is disposed in the sealed cavity and located on a side of the filter element assembly 300 close to the second housing 200. The humidifying medium 400 is used to absorb moisture exhaled by the human body to further humidify the inhaled gas.

[0048] In some embodiments, the HMEF includes a sticky note 500, which is attached to the outside of the connection between the first shell 100 and the second shell 200. The sticky note 500 further seals the connection between the first shell 100 and the second shell 200, and is convenient for users to mark.

[0049] In some embodiments, the HMEF includes a cap 600 , and an air intake hole is provided on the first shell 100 . The cap 600 covers the air intake hole, and a breath sample can be easily extracted through the air intake hole for testing.

[0050] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A heat and moisture exchange filter, characterized in that: The heat and moisture exchange filter comprises a first shell (100), a second shell (200) and a filter element assembly (300), wherein the first shell (100) is sealedly connected to the second shell (200) via a first sealing structure (10), the filter element assembly (300) is arranged in a closed cavity formed by the first shell (100) and the second shell (200), and the first shell (100) and / or the second shell (200) are sealedly connected to the filter element assembly (300) via a second sealing structure (20), and the first sealing structure (10) is located on the outside of the second sealing structure (20).

2. The heat and moisture exchange filter according to claim 1, characterized in that The first layer sealing structure (10) comprises a first groove (110) and a first protrusion (210) sealingly matched with the first groove (110); the first protrusion (210) is arranged on one of the first shell (100) and the second shell (200), and the first groove (110) is opened on the other.

3. The heat and moisture exchange filter according to claim 1, characterized in that The filter element assembly (300) comprises a bracket (320) and a filter element (310) arranged on the bracket (320); one end of the bracket (320) is in contact with the first shell (100), and the other end is connected to the second shell (200) via the second layer sealing structure (20).

4. The heat and moisture exchange filter according to claim 3, characterized in that The second layer sealing structure (20) comprises a second groove (321) and a second protrusion (220) sealingly matched with the second groove (321); the second protrusion (220) is arranged on one of the bracket (320) and the second shell (200), and the second groove (321) is opened on the other.

5. The heat and moisture exchange filter according to claim 4, characterized in that The second protrusion (220) is arranged in the second shell (200), and the second protrusion (220) is an annular structure coaxial with the second shell (200); the bracket (320) is provided with an annular second groove (321).

6. The heat and moisture exchange filter according to claim 1, characterized in that The sealing height of the second sealing structure (20) is greater than the sealing height of the first sealing structure (10).

7. The heat and moisture exchange filter according to claim 2, characterized in that: The first groove (110) has an inner wall (111) and an outer wall (112) for forming an annular groove, and the distance between the inner wall (111) and the outer wall (112) gradually decreases along the direction from the groove opening to the groove bottom.

8. The heat and moisture exchange filter according to claim 1, characterized in that The first sealing structure (10) comprises a welding layer, and the first shell (100) and the second shell (200) are connected via the welding layer.

9. The heat and moisture exchange filter according to claim 1, characterized in that: The heat and moisture exchange filter comprises a humidifying medium (400), wherein the humidifying medium (400) is arranged in a sealed cavity and is located on a side of the filter element assembly (300) close to the second shell (200).

10. The heat and moisture exchange filter according to claim 1, characterized in that The heat and moisture exchange filter comprises a sticky note (500), and the sticky note (500) is pasted outside the connection position between the first shell (100) and the second shell (200).

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