Filter assembly, air intake structure for a ventilation therapy device, and ventilation therapy device

Abstract

The utility model relates to a filter assembly of ventilation therapy equipment, air inlet structure and ventilation therapy equipment, relate to breathing machine technical field. The utility model discloses a filter assembly of ventilation therapy equipment, including filter support and filter piece, the filter support is installed in the air inlet structure of ventilation therapy equipment, and is sealed with air inlet structure link to each other, the filter support includes filter piece installation part, the filter piece is detachably installed in filter piece installation part, and two opposite surfaces of filter piece all have at least a part through filter piece installation part respectively exposed in air inlet structure, filter piece installation part includes accommodating cavity, one end of accommodating cavity is open end, and filter piece can be installed to accommodating cavity through open end.

Description

Technical Field

[0001] This utility model relates to the field of ventilator technology, and in particular to a filtration component, air intake structure, and ventilation therapy device. Background Technology

[0002] As an effective means of artificially replacing spontaneous ventilation, ventilators are widely used to treat respiratory diseases such as respiratory failure, respiratory insufficiency, sleep apnea syndrome, and chronic obstructive pulmonary disease, occupying a very important position in the field of modern medicine. The ventilator's filter is a crucial component, directly affecting the quality of the air the user breathes. Currently, the filter in most ventilators is fixed to the inlet end face. Therefore, replacing the filter requires disassembling the entire ventilator casing. This makes filter replacement cumbersome; furthermore, since the ventilator casing is a vital support and protective component, and also functions in conjunction with internal functional components, frequent disassembly can disrupt the normal operation of the ventilator. Utility Model Content

[0003] This utility model provides a filter component, an air intake structure, and a ventilation therapy device to solve at least one of the above-mentioned technical problems.

[0004] This utility model provides a filter assembly for a ventilation therapy device, including a filter bracket and a filter element. The filter bracket is installed in the air intake structure of the ventilation therapy device and is sealed to the air intake structure. The filter support includes a filter element mounting part, in which the filter element is detachably mounted. The filter element mounting part includes a receiving cavity, one end of which is an open end, through which the filter element can be installed into the receiving cavity.

[0005] In one embodiment, at least a portion of each of the two opposing surfaces of the filter element is exposed to the air passage of the intake structure via the filter element mounting portion.

[0006] In one embodiment, a first window and a second window are respectively provided on opposite sides of the receiving cavity, both of which are in communication with the receiving cavity. At least a portion of one surface of the filter element is exposed to the air passage of the air intake structure through the first window, and at least a portion of the other opposite surface of the filter element is exposed to the air passage of the air intake structure through the second window.

[0007] In one embodiment, the first window and / or the second window are provided with at least one reinforcing rib. In one embodiment, the filter bracket further includes a mounting panel connected to the filter element mounting portion. The mounting panel is provided with one or more of a limiting portion, a locking portion, and an operating portion. The limiting portion is used to abut against the outer side of the air intake structure, the locking portion is used to fix the filter bracket in the air intake structure, and the operating portion is used to apply force to the mounting panel to install the filter bracket into the air intake structure or to separate the filter bracket from the air intake structure. In one embodiment, the system further includes a first sealing element, which covers the filter mounting portion. The outer wall of the first sealing element is provided with a sealing portion for sealing connection with the air intake structure. The inner wall of the first sealing element is provided with a first mating portion, and the filter mounting portion is provided with a second mating portion, wherein the first mating portion and the second mating portion are mated and connected.

[0008] This utility model also provides an air intake structure for a ventilation therapy device, including an installation cavity for sealingly connecting with the filter assembly of the ventilation therapy device described above, and an air intake channel communicating with the installation cavity. The air intake channel includes a first air intake channel and a second air intake channel located on opposite sides of the installation cavity. The first air intake channel is configured such that the airflow therein changes direction and flows to the filter assembly and the second air intake channel.

[0009] In one embodiment, the first air intake passage is configured as an arc-shaped bend that curves away from the mounting cavity.

[0010] In one embodiment, a first opening and a second opening are respectively provided on opposite sides of the mounting cavity, the air outlet of the first air inlet channel is connected to the first opening, and the air inlet of the second air inlet channel is connected to the second opening. At least a portion of the air intake surface of the filter element is exposed to the first air intake channel through the filter element mounting portion and the first opening, and at least a portion of the air outlet surface of the filter element is exposed to the second air intake channel through the filter element mounting portion and the second opening.

[0011] In one embodiment, a second seal is further included, which is connected to the air intake end of the first air intake channel. This utility model also provides a ventilation therapy device, including the above-mentioned filter component and / or the above-mentioned air intake structure of the ventilation therapy device, and further including a housing, wherein an air inlet and an installation port are respectively provided on the end face of the housing, the air inlet is connected to the air intake structure of the ventilation therapy device, and the filter component mounting part is installed into the air intake structure of the ventilation therapy device through the installation port. In one embodiment, the air inlet includes at least one air inlet hole formed on the end face of the housing and extending along the thickness direction of the end face, wherein the air inlet hole is configured such that its axial cross-sectional area on the inner end face of the housing is smaller than its axial cross-sectional area on the outer end face of the housing.

[0012] In one embodiment, the central axis of the air inlet has a set angle with the center line of the thickness direction of the end face.

[0013] In one embodiment, the air inlet is configured such that the lower edge of the air inlet located on the outer end face of the housing is lower than the lower edge of the air inlet located on the inner end face of the housing.

[0014] In one embodiment, the air inlet is configured such that two opposite sides on its axial cross-section have a first angle and a second angle with the central axis of the thickness direction of the end face, and the first angle and the second angle are different.

[0015] In one embodiment, the edge of the mounting panel on the filter bracket is flush with the end face of the housing.

[0016] Compared with the prior art, the advantages of this utility model are that, since the filter bracket is detachably installed in the air intake structure and one end of the receiving cavity of the filter element installation part is an open end, when the filter element needs to be replaced, the filter bracket can be directly removed from the air intake structure, the old filter element can be removed from the open end of the receiving cavity, and the new filter element can be inserted from the open end of the receiving cavity to reinstall the filter bracket into the air intake structure. Therefore, the operation of replacing the filter element is simpler and more convenient; and the filter element can be replaced without removing the housing of the ventilation therapy device, thereby ensuring that the normal use of the ventilation therapy device is not affected. Attached Figure Description

[0017] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0018] Figure 1 This is an exploded view of the filter assembly of the ventilation therapy device in an embodiment of this utility model; Figure 2 This is a three-dimensional structural diagram of the filter assembly of the ventilation therapy device in an embodiment of this utility model, viewed from above. Figure 3 This is a three-dimensional structural diagram of the filter assembly of the ventilation therapy device in an embodiment of this utility model, viewed from the left side. Figure 4 This is a three-dimensional structural schematic diagram of the filter component of the ventilation therapy device in an embodiment of this utility model, viewed from below. Figure 5 yes Figure 2 A three-dimensional structural diagram of the filter support shown; Figure 6 yes Figure 2 A three-dimensional structural schematic diagram of the first sealing element shown; Figure 7 This is a three-dimensional structural diagram of the ventilation therapy device in an embodiment of the present invention, showing only the parts related to the filter assembly; Figure 8 This is an exploded view of the ventilation therapy device in an embodiment of the present invention, showing only the parts related to the filter assembly; Figure 9 This is a perspective sectional view of the ventilation therapy device in an embodiment of the present invention, showing only the parts related to the filter assembly; Figure 10 This is a cross-sectional view of the ventilation therapy device along the Z direction in an embodiment of this utility model, wherein the housing is not shown; Figure 11 This is a three-dimensional sectional view of the ventilation therapy device in an embodiment of this utility model, wherein the outer wall of the air intake structure is not shown; Figure 12 This is a cross-sectional view of the ventilation therapy device along the X direction in an embodiment of the present invention, showing only the parts related to the filter assembly; Figure 13 This is a cross-sectional view of the ventilation therapy device along the Z direction in an embodiment of the present invention, showing the second seal; Figure 14 yes Figure 13 The enlarged view shown is of the second seal installed between the air intake passage and the air intake port. Figure 15 This is an exploded view of the air intake structure of the ventilation therapy device in an embodiment of this utility model; Figure 16 yes Figure 13 A three-dimensional structural schematic diagram of the second seal shown; Figure 17 yes Figure 7 A schematic diagram of the axial cross-section of the air inlet shown. Figure 18 yes Figure 7 The front view of the air intake shown; Figure 19 yes Figure 7 The axial cross-sectional view of the air inlet shown.

[0019] Figure label: 1. Housing; 11. End face; 12. Air inlet; 13. Mounting port; 121. Air inlet hole; 1211, 1212. Side; 131. Third mating part.

[0020] 2. Filter components; 21. Filter support; 22. Filter element; 23. First seal; 211. Filter element mounting part; 2111. Receiving cavity; 2112. First window; 2113. Second window; 2114. Reinforcing rib; 2115. Second mating part; 212. Installation panel; 2121. Limiting part; 2122. Engaging part; 2123. Operating part; 231. Sealing part; 232. First mating part; 3. Intake structure; 31. First intake channel; 32. Second intake channel; 33. Second seal; 34. Mounting cavity; 341. First opening; 342. Second opening; 311. Air intake end; 312. First sealing rib; 331. Second sealing rib; 332. Positioning groove; 4. Noise reduction box; 41. Air intake structure. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] like Figures 1-6 As shown, this utility model provides a filter assembly for a ventilation therapy device, including a filter support 21, a filter element 22, and a first sealing element 23. Please refer to... Figure 7 and Figure 8 The filter bracket 21 is detachably installed in the air intake structure 3 of the ventilation therapy device and is sealed to the air intake structure 3.

[0023] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the filter holder 21 is generally a rectangular drawer-type structure, which can be moved along... Figure 7 and Figure 12 It is installed in the intake structure 3 in the opposite direction of the X direction shown. For example... Figure 3 and Figure 5 As shown, the filter support 21 includes a filter element mounting part 211, in which the filter element 22 is detachably mounted. The filter element 22 can be a type of filter cotton such as fiber filter cotton, non-woven filter cotton, glass fiber filter cotton, or activated carbon filter cotton; in addition, the filter element 22 can also be classified as a pre-filter cotton, medium-efficiency filter cotton, etc., according to different filtration efficiencies.

[0024] Since the filter bracket 21 is detachably installed in the air intake structure 3 and the filter element 22 is detachably installed in the filter element mounting part 211, when the filter element 22 needs to be replaced, the filter bracket 21 can be directly removed from the air intake structure 3, the old filter element 22 can be removed from the filter element mounting part 211, and the new filter element 22 can be inserted into the filter element mounting part 211 to reinstall the filter bracket 21 into the air intake structure 3. Therefore, the operation of replacing the filter element 22 is simpler and more convenient; and the filter element can be replaced without removing the housing 1 of the ventilation therapy device, thereby ensuring that the normal use of the ventilation therapy device is not affected.

[0025] like Figure 1 As shown, the filter element 22 can be installed in the filter element mounting portion 211 along the X direction (horizontal direction). At least a portion of each of the two opposing surfaces of the filter element 22 is exposed to the air intake structure 3 through the filter element mounting portion 211, so that the airflow in the air intake structure 3 can be filtered and purified when it flows through the filter element 22.

[0026] The installation direction of the filter bracket 21 and the filter element 22 are both perpendicular to the plane of the air inlet 12 of the air inlet structure 3. Please refer to... Figure 7 The installation direction of filter bracket 21 is Figure 7 The negative X-axis direction shown is the overall extension direction of the filter bracket 21. Please refer to... Figure 1 The installation direction of filter element 22 is Figure 7 The positive X-axis direction, i.e., the installation direction of the filter bracket 21, is opposite to the installation direction of the filter element 22. The end face of the air inlet 12 of the air inlet structure 3 is the end face 11 of the housing 1, i.e. Figure 7 The YZ plane in [the context]. Please refer to [the relevant information]. Figure 9 The installation direction of the filter bracket 21 and the filter element 22 is perpendicular to the end face of the air inlet 12 of the air intake structure 3. The filter bracket 21 and the filter element 22 are installed horizontally as a whole, while the air inlet 12 of the air intake structure 3 is opened on a vertical plane. This allows the filter element 22 to be effectively separated from the air inlet 12 of the air intake structure 3 (the filter element 22 cannot be observed through the air inlet 12), so that external water will not easily splash onto the filter element 22 through the air inlet 12, thereby minimizing the problem of filter element 22 becoming wet and causing filtration failure.

[0027] Specifically, such as Figure 5 As shown, and please refer to Figure 1 The filter element mounting part 211 includes a receiving cavity 2111, one end of which is an open end, allowing the filter element 22 to be installed into the receiving cavity 2111 through the open end. Figure 5As shown, a first window 2112 and a second window 2113 are respectively provided on opposite sides of the receiving cavity 2111, and both the first window 2112 and the second window 2113 are connected to the receiving cavity 2111. Figure 3 and Figure 4 As shown, and please refer to Figure 9 At least a portion of one surface of the filter element 22 is exposed to the air passage of the intake structure 3 through the first window 2112, and at least a portion of the other opposite surface of the filter element 22 is exposed to the air passage of the intake structure 3 through the second window 2113, thereby filtering the airflow in the intake structure 3.

[0028] At least one reinforcing rib 2114 is provided on the first window 2112 and / or the second window 2113. Since the airflow in the intake structure 3 impacts the filter element 22 as it passes through it, the reinforcing rib 2114 prevents the filter element 22 from shifting due to excessive airflow. Figure 4 As shown, the second window 2113 has two reinforcing ribs 2114, which form a cross-shaped structure. Understandably, the first window 2112 can also adopt a similar configuration.

[0029] Preferably, the second window 2113 is provided with reinforcing ribs 2114, while the first window 2112 is not provided with reinforcing ribs 2114. Since the airflow first passes through the first window 2112 and then sequentially through the filter element 22 and the second window 2113, the absence of reinforcing ribs 2114 on the first window 2112 allows the surface (upper surface) of the filter element 22 corresponding to the first window 2112 to be exposed to the air passage of the intake structure 3 as much as possible through the first window 2112, thereby increasing the contact area between the airflow and the filter element 22. Simultaneously, the second window 2113 is provided with reinforcing ribs 2114, ensuring that the surface of the filter element 22 corresponding to the second window 2112 is exposed to the air passage of the intake structure 3. While the surface of window 2113 has a certain exposed area through the second window 2113, the setting of reinforcing rib 2114 can enhance the installation strength of filter element 22 in the second window 2113 when the airflow flows from the first window 2112 to the second window 2113. This prevents the filter element 22 from tilting or being blown out of the receiving cavity 2111 from the second window 2113 when the airflow flows from the first window 2112 to the second window 2113, thereby ensuring the reliability of the filter element 22 installed in the receiving cavity 2111.

[0030] Please continue reading Figure 5The filter support 21 also includes a mounting panel 212 connected to the filter mounting portion 211. When the filter support 21 is installed into the air intake structure 3, the edge of the mounting panel 212 is basically flush with the plane of the air intake port 12 of the air intake structure 3. The mounting panel 212 can cooperate with the plane of the air intake port 12 of the air intake structure 3, so that the ventilation therapy device has a uniform and beautiful shape. On the other hand, the mounting panel 212 can be provided with one or more of the limiting portion 2121, the engaging portion 2122, and the operating portion 2123. The limiting portion 2121 is used to abut against the outer side of the air intake structure 3, the engaging portion 2122 is used to fix the filter support 21 in the air intake structure 3, and the operating portion 2123 is used to apply force to the mounting panel 212 on the outer side of the housing 1 of the ventilation therapy device to install the filter support 21 into the air intake structure 3 or to separate the filter support 21 from the air intake structure 3.

[0031] like Figure 5 As shown, the limiting part 2121 can be a limiting boss that protrudes from the inside of the mounting panel 212 (i.e. the side near the filter mounting part 211). When the filter bracket 21 is installed into the air intake structure 3 in the X direction, the limiting part 2121 abuts against the outside of the air intake structure 3 (the outer wall of the noise reduction box 4), thereby ensuring that the filter assembly 2 is installed in the correct inward position.

[0032] like Figure 5 As shown, the engaging portion 2122 can be one of the engaging protrusions and engaging grooves located at both ends of the mounting panel 212, which can engage with the third mating portion 131 on the housing 1 of the ventilation therapy device (see [link]). Figure 8 (It can be the other of the engaging protrusion and engaging groove) engage with each other, so that the filter assembly 2 can be installed and positioned, and fixed in the air intake structure 3.

[0033] The engagement of the locking part 2122 and the third mating part 131 ensures a stable connection between the filter assembly 2 and the air intake structure 3, preventing loosening or detachment during use and thus guaranteeing the filtration effect. Furthermore, the design of the locking protrusions and grooves simplifies the structure and makes it easier to implement. During connection, slight deformation allows for easy connection or separation, making the assembly and disassembly of the filter assembly 2 as simple and easy as pulling a drawer.

[0034] like Figure 4 As shown, the operating part 2123 may be an outwardly protruding recess or groove on the outer side of the mounting panel 212, which allows the operator's fingers to be inserted into it in order to apply force to the mounting panel 212.

[0035] like Figure 3 and Figure 6As shown, the first seal 23 covers the filter mounting portion 211, and a sealing portion 231 is provided on the outer wall of the first seal 23. Figure 9 As shown, the sealing part 231 is used for sealing connection with the intake structure 3. The sealing part 231 may be a protrusion protruding outward on the outer wall of the first sealing member 23, such as... Figure 6 As shown, when the first seal 23 is disposed in the air intake structure 3, an interference fit is formed between the sealing portion 231 of the first seal 23 and the inner wall of the air intake structure 3. That is, when the first seal 23 is located in the air intake structure 3, the sealing portion 231 is in a compressed state, thereby ensuring a sealed connection between the filter assembly 2 and the air intake structure 3. The number of sealing portions 231 can be two or more, and they can be spaced apart in the extending direction of the first seal 23.

[0036] like Figure 5 As shown, a second mating part 2115 is provided on the filter element mounting part 211, and the first mating part 232 is mated and connected to the second mating part 2115. The first mating part 232 may be one of a groove and a protrusion extending circumferentially around the first sealing member 23, and correspondingly, the second mating part 2115 may be the other of a groove and a protrusion extending circumferentially around the filter element mounting part 211, and the two can be engaged and connected to each other.

[0037] The first seal 23 can ensure a sealed connection between the filter mounting part 211 and the air intake structure 3, so that the air entering the air intake structure 3 enters through the air intake port 12 and is completely filtered by the filter 22, which can effectively prevent the intrusion of dust, impurities or liquids.

[0038] This utility model also provides an air intake structure 3 for a ventilation therapy device, including a mounting cavity 34 for sealingly connecting with the filter assembly 2 of the aforementioned ventilation therapy device, and an air intake channel communicating with the mounting cavity 34, such as... Figure 8 As shown, the air intake channel includes a first air intake channel 31 and a second air intake channel 32 located on opposite sides of the mounting cavity 34.

[0039] The first air intake channel 31 is configured such that the airflow therein changes direction and flows to the filter assembly 2 and the second air intake channel 32. For example, as... Figure 9 As shown, the first air intake passage 31 is constructed as an arc-shaped bend that curves away from the mounting cavity 34. Therefore, as Figure 10As shown, the plane of the air inlet end 311 of the first air inlet channel 31 is approximately perpendicular to the plane of the air outlet end of the first air inlet channel 31. The airflow in the first air inlet channel 31 enters from its air inlet end in a roughly horizontal direction, changes direction therein, and then flows out from its air outlet end to the filter assembly 2 in a roughly vertical direction, that is, the direction of the airflow changes by about 90°. Therefore, the airflow changes direction by passing through the first air inlet channel 31, which spatially isolates the filter assembly 2 within the air intake structure 3 from the air inlet side of the first air inlet channel 31. This avoids the problem of external water splashing directly onto the filter element 22 through the air inlet side of the first air inlet channel 31, thus wetting the filter element 22 and affecting the filtration effect. Because most existing technologies integrate the filter element 22 for air intake filtration into the air inlet 12, when water or other liquids from the outside splash or flow into the housing 1 through the air inlet 12, the filter element 22 is easily wetted first, thus affecting its filtration effect on the airflow and causing the filtration function to fail. In this utility model, the filter element 22 is positioned in the downstream chamber relative to the air inlet in the airflow direction, which can prevent external liquids from directly contacting the filter element 22, thereby ensuring the normal filtration function of the filter element 22 and extending its service life.

[0040] like Figure 9 , Figure 11 and Figure 15 As shown, the mounting cavity 34 is constructed in the noise reduction box 4 of the ventilation therapy device. The noise reduction box 4 is located inside the housing 1 of the ventilation therapy device. The noise reduction box 4 includes an air intake structure 41. The mounting cavity 34 is constructed in the air intake structure 41 and extends in a direction perpendicular to the plane where the air outlet end of the first air intake channel 31 is located.

[0041] Furthermore, such as Figure 9 As shown, a first opening 341 and a second opening 342 are respectively provided on opposite sides of the mounting cavity 34. The air outlet of the first air intake channel 31 is connected to the first opening 341, and the air intake end of the second air intake channel 32 is connected to the second opening 342. Figure 9 As shown, the first air intake channel 31 is located on the upper side of the mounting cavity 34, and its air outlet end is opposite to the first opening 341. The first air intake channel 31 and the air intake structure 41 in which the mounting cavity 34 is located can be a separate structure or an integrated structure. Figure 9 As shown, the second air intake channel 32 is located on the lower side of the mounting cavity 34, and its air intake end is opposite to the second opening 342. The second air intake channel 32 and the air intake structure 41 in which the mounting cavity 34 is located can be an integral structure, for example, the second air intake channel 32 is integrated on the lower side of the mounting cavity 34; or the second air intake channel 32 and the mounting cavity 34 can also be a separate structure.

[0042] After the filter assembly 2 is inserted into the mounting cavity 34 along the extending direction of the mounting cavity 34, the air inlet surface of the filter element 22 (such as...) Figure 10 At least a portion of the upper surface shown passes through the filter mounting part 211 (please refer to the upper surface shown). Figure 3 The first opening 341 is exposed to the first air intake passage 31, and at least a portion of the air outlet surface of the filter element 22 (such as...) Figure 10 The lower surface shown) passes through the filter element mounting part 211 (please refer to...). Figure 3 The first air intake 31 and the second opening 342 are exposed to the second air intake passage 32. Therefore, the airflow enters the first air intake passage 31 from the air intake end 311 in a generally horizontal direction (X direction), changes direction in the first air intake passage 31, enters the air intake surface of the filter element 22 from the air outlet end of the first air intake passage 31 in a generally vertical direction (Z direction), and flows out from the air outlet surface of the filter element 22 after being filtered by the filter element 22. Then, it enters the second air intake passage 32 through the air intake side of the second air intake passage 32, and enters the noise reduction box 4 (e.g., into the fan assembly of the noise reduction box 4) through the second air intake passage 32.

[0043] like Figures 14 to 16 As shown, the air intake structure 3 of the ventilation therapy device further includes a second seal 33, which is connected to the air intake end 311 of the first air intake channel 31. The second seal 33 can seal and fix the air intake end 311 of the first air intake channel 31 in the housing 1 of the ventilation therapy device described below. This utility model also provides a ventilation therapy device, which may be, for example, a ventilator.

[0044] like Figure 7 and Figure 8 As shown, the ventilation therapy device of this utility model includes the filter component 2 and / or the air intake structure 3 of the ventilation therapy device mentioned above, and also includes a housing 1, with the air intake structure 3 disposed inside the housing 1.

[0045] An air inlet 12 is provided on the end face 11 of the housing 1. An air intake channel is provided inside the housing 1. The air intake end of the air intake channel is in fluid communication with the air inlet 12. The air intake channel includes a first air intake channel 31 and a second air intake channel 32. Specifically, the air intake end 311 of the first air intake channel 31 is in fluid communication with the air inlet 12, and the plane of the air intake end 311 of the first air intake channel 31 is parallel to the plane of the air inlet 12. That is, gas enters the air intake end 311 of the first air intake channel 31 from the outside through the air inlet 12 in a generally horizontal direction.

[0046] like Figure 8 As shown, a mounting port 13 is also provided on the end face 11 of the housing 1. The mounting port 13 penetrates the end face 11 in the thickness direction (X direction), for example... Figure 9As shown, both the air inlet 12 and the mounting port 13 are located on the side wall of the housing 1. In other embodiments, the air inlet 12 and the mounting port 13 may also be located on the top or bottom wall of the housing 1. Figure 9 As shown, the mounting port 13 is connected to the mounting cavity 34, so the filter element mounting part 211 can be mounted via the mounting port 13 along its mounting direction ( Figure 7 (As shown in the X direction) is installed in the mounting cavity 34, and the airflow enters the air intake channel through the air inlet 12 and then flows through the filter element 22. like Figure 8 As shown, the filter element mounting part 211 of the filter assembly 2 passes horizontally through the mounting port 13 and is installed into the mounting cavity 34. The mounting port 13 has two opposing inner walls with third mating parts 131 that cooperate with the aforementioned engaging part 2122, allowing the mounting panel 212 of the filter assembly 2 to be embedded in the mounting port 13 and fixed therein through the cooperation of the third mating parts 131 and the engaging part 2122. The outer periphery of the mounting panel 212 is substantially aligned with the end face 11 of the housing 1, thereby improving the overall integrity and aesthetics of the ventilation therapy device, as well as enhancing the stability and firmness of the filter assembly installation and preventing accidental contact with the filter assembly from outside the housing 1.

[0047] like Figure 9 and Figure 10 As shown, when the filter mounting part 211 is installed into the mounting cavity 34, the limiting part 2121 on the inner side of the mounting panel 212 abuts against the outer wall of the mounting cavity 34 (i.e., the outer wall of the air intake structure 41 of the noise reduction box 4), thereby ensuring that the filter assembly 2 is installed correctly inward.

[0048] like Figure 10 As shown, when the filter element mounting part 211 is installed into the mounting cavity 34, the sealing part 231 of the first sealing member 23 on it is sealed to the inner walls of the upper and lower sides of the mounting cavity 34, and the open end of the receiving cavity 2111 is opposite to the inner wall of the mounting cavity 34, thereby restricting the filter element 22 between the mounting cavity 34 and the receiving cavity 2111.

[0049] Understandably, the installation direction of the filter assembly 2 is parallel to the extension direction of the air inlet 12. However, since the first air inlet channel 31 can redirect the gas entering from the air inlet 12, the installation direction of the filter assembly 2 can be perpendicular to the end face of the housing 1 where the air inlet 12 is located. This completely isolates the filter assembly 2 from the air inlet 12 in space, preventing external water from splashing onto the filter element 22 through the air inlet 12 and causing the filter element 22 to become wet.

[0050] like Figure 9 and Figure 10As shown, the arrows indicate the airflow direction in the air intake structure 3. The airflow enters from the air intake 12, changes direction to vertical in the first air intake channel 31, flows through the filter element 22, and then flows into the second air intake channel 32. Therefore, by improving the air intake structure 3, the filter element 2 can be installed in the direction described above, spatially isolating it from the air intake side of the first air intake channel 31. This prevents external water from directly splashing onto the filter element 22 through the air intake side of the first air intake channel 31, thus avoiding the problem of the filter element 22 becoming wet and affecting the filtration effect. As described above, most existing technologies integrate the filter element 22 for air intake filtration into the air inlet 12. This arrangement can easily wet the filter element 22 when external liquids such as water splash or flow into the housing 1 through the air inlet 12, affecting its filtration function and causing it to fail. In this invention, the filter element 22 is positioned in the downstream chamber relative to the air inlet in the airflow direction. This prevents external liquids from directly contacting the filter element 22, ensuring its normal filtration function and extending its service life. Furthermore, the airflow entering through the air inlet 12 undergoes a reversal within the first air intake channel 31. During this reversal, the airflow collides and rubs against the inner wall of the first air intake channel 31, effectively reducing airflow noise and achieving a good intake noise reduction effect.

[0051] like Figure 8 and Figure 11 As shown, the housing 1 is equipped with a noise reduction box 4 for reducing fan noise in ventilation therapy equipment, and the air intake structure 3 can be constructed in the air intake structure 41 of the noise reduction box 4. Therefore, it can be understood that the air inlet 12 is the air inlet of the noise reduction box 4.

[0052] like Figure 13 , Figure 14 , Figure 15 and Figure 16 As shown, the second seal 33 is located between the air inlet end 311 and the air inlet 12 of the first air inlet channel 31. The second seal 33 is used to seal the air inlet end 311 of the first air inlet channel 31 and the air inlet 12. Specifically, as shown... Figure 13 As shown, the air intake end 311 of the first air intake channel 31 is located inside the end face 11 of the housing 1, and the second sealing member 33 is located between the air intake end 311 of the first air intake channel 31 and the air inlet 12, so that the air intake end 311 of the first air intake channel 31 and the air inlet 12 can be sealed and connected.

[0053] like Figure 15 and Figure 16As shown, a positioning groove 332 is provided on the inner side of the second sealing member 33. When the second sealing member 33 is fitted onto the outside of the air intake end 311 of the first air intake channel 31, the positioning groove 332 is engaged with the first sealing rib 312 at the air intake end 311 of the first air intake channel 31. Alternatively, the first sealing rib 312 is provided on the inner side of the second sealing member 33, and the positioning groove 332 is provided at the air intake end 311 of the first air intake channel 31, which can achieve the same connection effect.

[0054] like Figure 15 As shown, the positioning groove 332 extends only partially circumferentially along the second seal 33; or the positioning groove 332 may extend along the entire circumference of the second seal 33. Figure 16 The second sealing member 33 is further provided with a second sealing rib 331 on its outer side, and the second sealing rib 331 protrudes outward from the outer end face of the second sealing member 33. The air intake end 311 of the first air intake channel 31 abuts against the inner end face of the second sealing member 33, thus providing positive pressure to the second sealing member 33. This results in an interference fit between the second sealing member 33 and the inner side of the end face 11 of the housing 1, i.e., when the second sealing member 33 is located between the air intake end 311 of the first air intake channel 31 and the inner side of the end face 11 of the housing 1, such as... Figure 13 As shown, the second sealing rib 331 is in a compressed state, thereby ensuring the air intake seal, thus realizing the effective connection and sealing between the air intake end 311 of the air intake structure 3 and the air intake port 12 on the housing 1.

[0055] like Figure 7 As shown, the air inlet 12 includes at least one air inlet hole 121 formed on the end face 11 of the housing 1 and extending along the thickness direction of the end face 11. When there are multiple air inlets 121, the multiple air inlets 121 can be distributed according to a certain pattern, such as forming a square, rhombus, hexagon, or other patterns, or the multiple air inlets 121 can be distributed at the same interval.

[0056] Furthermore, such as Figure 17 and Figure 18 As shown, the air inlet 121 is constructed such that its axial cross-sectional area on the inner end face of the housing 1 (in the thickness direction of the end face 11) is smaller than its axial cross-sectional area on the outer end face of the housing 1. That is, the air inlet 121 has a flared mouth structure, with a smaller inner opening and a larger outer opening. On the one hand, this type of air inlet 121 can suppress the outward propagation of noise from inside the housing 1 while ensuring unobstructed air intake. On the other hand, this type of air inlet 121 can also facilitate opening and demolding during manufacturing. Furthermore, when there is water or other liquid on the outer end face of the housing 1, the liquid is less likely to enter the housing, thus protecting the filter element 22 from the risk of getting wet, and at the same time protecting the air passage inside the housing 1 from the risk of getting wet.

[0057] like Figure 17 As shown, there is a set angle between the central axis of the air inlet 121 and the central axis of the end face of the housing 1 in the thickness direction. Figure 17 As can be seen, when the air inlet 121 is located on the side wall end face of the housing 1, the central axis of the air inlet 121 is parallel to the central axis of the side wall end face of the housing 1 where the air inlet 121 is located in the thickness direction (e.g., Figure 17 There is a certain angle between the air inlet 121 and the horizontal line in the middle, that is, the air inlet 121 is tilted downward or upward at a certain angle relative to the central axis of the thickness of the end face. In other embodiments, for example, when the air inlet 121 is opened on the top surface of the housing 1, there is a certain angle between the central axis of the air inlet 121 and the central axis (vertical line) of the thickness direction of the top surface of the housing 1 where the air inlet 121 is located. The setting of the set angle between the central axis of the air inlet 121 and the central axis of the thickness direction of the end face of the housing 1 can play a certain role in suppressing the outward transmission of noise inside the housing 1; on the other hand, when there is water or other liquid on the outer end face of the housing 1, the liquid is not easy to enter the housing, thereby protecting the filter element 22 from the risk of getting wet, and at the same time protecting the air passage inside the housing 1 from the risk of getting wet. Preferably, as Figure 19 As shown, the air inlet 121 is configured such that the lower edge of the air inlet 121 located on the outer end face of the housing 1 is lower than the lower edge of the air inlet 121 located on the inner end face of the housing 1. Since the lower edge of the air inlet 121 on the outer end face is lower than the lower edge of the inner end face, when liquid flows across the outer surface of the housing, the liquid is less likely to enter the inner side of the air inlet 121 from the outside, and thus less likely to enter the housing 1.

[0058] like Figure 19 As shown, the axial direction of the air inlet 121 is inclined relative to the thickness direction of the end face 11, and the air inlet 121 is constructed with two opposing sides 1211 and 1212 on its axial cross-section having a first included angle θ1 and a second included angle θ2 with the central axis of the end face 11 in the thickness direction, respectively. That is to say, the central axis of the air inlet 121 (as shown in the figure) is inclined relative to the thickness direction of the end face 11. Figure 17 The air inlet 121 (shown by the dashed line) forms an angle with the central axis (e.g., the X direction) in the thickness direction of the end face 11. More specifically, there is an acute angle between them, meaning that the air inlet 121 extends obliquely downward (towards the mounting port 13) from the inside of the housing 1 to the outside. Therefore, as shown by the dashed line... Figure 19 As shown, the two opposite sides 1211 and 1212 on the axial section of the air inlet 121 are both inclined downwards, and the two opposite sides 1211 and 1212 on the axial section are not parallel, that is, the first included angle θ1 and the second included angle θ2 are different.

[0059] Preferably, θ2 is greater than θ1, that is, in the cross-section of the air inlet 121 along the thickness direction of the end face 11, its lower side is more inclined downward than its upper side, which has a better waterproof effect and a suppression effect on the reverse propagation of noise.

[0060] The air inlet 121 extends downwards at an angle, which effectively prevents water droplets from splashing in. Because the air inlet 121 extends downwards at an angle, the outer side of the air inlet 121 is lower than its inner side, so water from outside the housing 1 cannot enter the air intake structure 3 through the air inlet 121.

[0061] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A filter assembly for a ventilation therapy device, characterized by, It includes a filter support and a filter element, wherein the filter support is detachably installed in the air intake structure of the ventilation therapy device and is sealed to the air intake structure; The filter support includes a filter element mounting part, in which the filter element is detachably mounted. The filter element mounting part includes a receiving cavity, one end of which is an open end, through which the filter element can be installed into the receiving cavity.

2. The filter assembly of a ventilation therapy device according to claim 1, characterized in that, At least a portion of each of the two opposing surfaces of the filter element is exposed to the air passage of the intake structure through the filter element mounting portion.

3. The filter assembly of a ventilation therapy device according to claim 2, characterized in that, The receiving cavity has a first window and a second window on opposite sides, both of which are in communication with the receiving cavity. At least a portion of one surface of the filter element is exposed to the air passage of the air intake structure through the first window, and at least a portion of the other opposite surface of the filter element is exposed to the air passage of the air intake structure through the second window.

4. The filter assembly of a ventilation therapy device according to claim 3, characterized in that, The first window and / or the second window are provided with at least one reinforcing rib.

5. The filter assembly of a ventilation therapy device according to any one of claims 1-4, characterized in that, The filter support also includes a mounting panel connected to the filter element mounting portion; The mounting panel is provided with one or more of a limiting part, a locking part, and an operating part, wherein the limiting part is used to abut against the outside of the air intake structure, the locking part is used to fix the filter bracket in the air intake structure, and the operating part is used to apply force to the mounting panel to install the filter bracket into the air intake structure or to separate the filter bracket from the air intake structure.

6. The filter assembly of a ventilation therapy device according to any one of claims 1-4, characterized in that, It also includes a first sealing element, which covers the filter mounting portion. The outer wall of the first sealing element is provided with a sealing portion, which is used to seal and connect with the air intake structure. The inner wall of the first sealing element is provided with a first mating portion, and the filter mounting portion is provided with a second mating portion. The first mating portion and the second mating portion are mated and connected.

7. An air intake structure of a ventilation therapy apparatus, characterized by comprising: It includes a mounting cavity for sealingly connecting with a filter assembly of the ventilation therapy device according to any one of claims 1-6 and an air intake channel communicating with the mounting cavity, the air intake channel including a first air intake channel and a second air intake channel located on opposite sides of the mounting cavity; The first air intake channel is configured such that the airflow therein changes direction and flows to the filter assembly and the second air intake channel.

8. An air intake structure for a ventilation therapy device according to claim 7, characterized in that The first air intake channel is constructed as an arc-shaped bend that curves away from the mounting cavity.

9. An air inlet structure for a ventilation therapy device according to claim 7 or 8, characterised in that, The mounting cavity has a first opening and a second opening on opposite sides, the air outlet of the first air inlet channel is connected to the first opening, and the air inlet of the second air inlet channel is connected to the second opening. At least a portion of the air intake surface of the filter element is exposed to the first air intake channel through the filter element mounting portion and the first opening, and at least a portion of the air outlet surface of the filter element is exposed to the second air intake channel through the filter element mounting portion and the second opening.

10. An air inlet structure for a ventilation therapy device according to claim 7 or 8, characterised in that, It also includes a second seal, which is connected to the air intake end of the first air intake channel.

11. A ventilation therapy apparatus characterised in that, The device includes a filter assembly as described in any one of claims 1-6 and / or an air intake structure of a ventilation therapy device as described in any one of claims 7-10, and further includes a housing, wherein an air inlet and an installation port are respectively provided on the end face of the housing, the air inlet is connected to the air intake structure of the ventilation therapy device, and the filter mounting part is installed into the air intake structure of the ventilation therapy device via the installation port.

12. The ventilation therapy device of claim 11, wherein, The air inlet includes at least one air inlet hole formed on the end face of the housing and extending along the thickness direction of the end face, wherein the air inlet hole is configured such that its axial cross-sectional area on the inner end face of the housing is smaller than its axial cross-sectional area on the outer end face of the housing.

13. The ventilation therapy device of claim 12, wherein, There is a set angle between the central axis of the air inlet and the center line of the thickness direction of the end face.

14. The ventilation therapy device of claim 13, wherein, The air inlet is configured such that the lower edge of the air inlet located on the outer end face of the housing is lower than the lower edge of the air inlet located on the inner end face of the housing.

15. The ventilation therapy device of claim 14, wherein, The air intake is constructed such that two opposite sides on its axial cross-section have a first angle and a second angle with the central axis of the thickness direction of the end face, and the first angle and the second angle are different.

16. The ventilation therapy device of claim 11, wherein, The edge of the mounting panel on the filter bracket is flush with the end face of the housing.

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