Oxygen mixing module applied to respiratory therapy equipment

Abstract

The utility model discloses an oxygen mixing module applied to respiratory therapy equipment, the oxygen mixing module comprises a shell, the shell comprises an air inlet and an air outlet, the shell internally comprises a mixing cavity and an air delivery channel which are communicated with each other, the mixing cavity is communicated with the air inlet, the air delivery channel is communicated with the air outlet, and the air outlet is communicated with the mixing cavity. The shell further comprises an installation cavity, a gas parameter sensor assembly is arranged in the installation cavity, a monitoring input port of the sensor assembly is communicated with the gas conveying channel, and a monitoring output port of the sensor assembly is communicated with the mixing cavity. The sensor assembly is installed in the installation cavity, interference of the external environment on the sensor assembly is greatly reduced, a stable working environment is provided for parameter monitoring of the sensor assembly, the vibration resistance of the sensor assembly is remarkably improved, the vibration influence on the sensor assembly in the carrying process of the respiratory treatment equipment can be reduced, and the service life of the respiratory treatment equipment is prolonged. And the stability guarantee is provided for the monitoring precision of the sensor.

Description

Technical Field

[0001] This application belongs to the field of respiratory therapy equipment technology, specifically relating to an oxygen mixing module used in respiratory therapy equipment. Background Technology

[0002] Respiratory therapy devices play a vital role in medical and home care, providing patients with stable gas support, such as oxygen therapy or mixed gas therapy. As a core component of respiratory therapy devices, the mixed gas module functions to mix different gases (such as air and oxygen) in a specific ratio and deliver them to the patient through a gas delivery channel. To ensure the accuracy of gas mixing and the safety of delivery, the mixed gas module typically requires real-time monitoring of gas parameters in the delivery channel, such as humidity, flow rate, and oxygen concentration. The accuracy of these monitoring parameters directly affects the patient's treatment outcome and safety.

[0003] In existing technologies, gas parameter sensors are typically installed externally in the oxygen mixing equipment and connected to the gas delivery channel via a transmission pipe. While this design enables gas parameter monitoring, it also has significant drawbacks. First, the sensor is exposed to the external environment, making it susceptible to interference from external factors such as temperature, humidity, and dust, leading to unstable or distorted monitoring signals. Second, the presence of the transmission pipe increases the length and complexity of the gas transmission path, potentially introducing additional pressure loss or gas leakage risks, further affecting monitoring accuracy. Furthermore, externally mounted sensors are prone to displacement or loosening when the equipment moves or vibrates, thus reducing the system's reliability and durability.

[0004] Therefore, existing oxygen mixing equipment suffers from problems such as insufficient stability and poor anti-interference ability in gas parameter monitoring, and an improvement scheme is urgently needed to enhance the monitoring accuracy and reliability of the sensors. Utility Model Content

[0005] This application provides a mixed oxygen module for use in respiratory therapy equipment to solve the technical problem of inaccurate parameter monitoring caused by the sensor components being easily affected by external environmental interference in traditional mixed oxygen modules.

[0006] The technical solution adopted in this application is as follows:

[0007] An oxygen mixing module for use in a respiratory therapy device includes a housing with an air inlet and an air outlet. The housing contains a mixing chamber and a gas delivery channel that are interconnected. The mixing chamber is connected to the air inlet, and the gas delivery channel is connected to the air outlet. The housing also includes a mounting cavity containing a gas parameter sensor assembly. The sensor assembly's monitoring input port is connected to the gas delivery channel, and its monitoring output port is connected to the mixing chamber.

[0008] The oxygen mixing module described in this application also includes the following additional technical features:

[0009] The oxygen mixing module also includes an air intake sealing block, an air intake channel is formed inside the air intake sealing block, and a first communication port is opened in the cavity wall of the air intake channel. The monitoring input port of the sensor assembly is connected to the first communication port through the air intake channel.

[0010] The mounting cavity is provided with a first limiting rib for installing the air intake sealing block. When the air intake sealing block is installed on the first limiting rib, the air intake channel is aligned and connected to the first communication port and the monitoring input port respectively.

[0011] One of the housing and the air intake sealing block is provided with a limiting groove, and the other is provided with a limiting rib. The limiting rib cooperates with the limiting groove to limit the air intake sealing block.

[0012] The oxygen mixing module also includes an exhaust sealing block, an exhaust channel is formed inside the exhaust sealing block, a second communication port is opened in the cavity wall of the mixing chamber, and the monitoring output port of the sensor assembly is connected to the second communication port through the exhaust channel.

[0013] The mounting cavity is provided with a second limiting rib for mounting the vent sealing block. When the vent sealing block is installed in the second limiting rib, the vent channel is aligned and connected with the second communication port and the monitoring output port respectively.

[0014] The housing includes an upper housing and a lower housing, and the mounting cavity is located within the space formed by the upper housing and the lower housing.

[0015] The mounting cavity and the mixing cavity are located on the same side of the gas delivery channel. Along the extension direction of the gas delivery channel, the length of the gas delivery channel is greater than the length of the mounting cavity or the length of the mixing cavity, but not greater than the sum of the lengths of the mounting cavity and the mixing cavity.

[0016] The oxygen mixing module further includes an air inlet sealing block and an air outlet sealing block. An air inlet channel is formed inside the air inlet sealing block, and an air outlet channel is formed inside the air outlet sealing block. The sensor assembly is connected to the gas delivery channel and the mixing chamber through the air inlet channel and the air outlet channel, respectively. The mounting cavity is provided with a first mounting area near the gas delivery channel, a second mounting area near the mixing chamber, and a third mounting area abutting against the first mounting area and the second mounting area, respectively. The air inlet sealing block is mounted in the first mounting area, the air outlet sealing block is mounted in the second mounting area, and the sensor assembly is mounted in the third mounting area.

[0017] The sensor assembly includes a connected sensor and a circuit board. The circuit board is located above and covers the sensor. The vertical projection of the circuit board at least partially overlaps with the air inlet sealing block and the air outlet sealing block.

[0018] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0019] 1. The oxygen mixing module of this application includes a housing, within which are interconnected mixing chambers and gas delivery channels. The mixing chambers provide a mixing space for oxygen and air input through the air inlet, ensuring thorough mixing before delivery to the user via the gas delivery channels. The housing also includes a mounting cavity where a sensor assembly is installed. This isolation of the sensor assembly from the external environment under the protection of the housing significantly reduces interference from external factors such as temperature, humidity, and dust, providing a more stable working environment for parameter monitoring and improving its accuracy. Furthermore, for portable respiratory therapy devices that require frequent transport to different work scenarios, fixing the sensor assembly within the mounting cavity of the housing creates an integrated structure, significantly enhancing vibration resistance and reducing vibration impact during transport, thus ensuring the stability of the sensor assembly's monitoring accuracy.

[0020] Furthermore, compared to traditional technologies that externally mount the sensor assembly and connect it via a transmission pipe, the sensor assembly in this application is located within the mounting cavity of the housing, closer to the gas delivery channel. This results in a shorter gas delivery path from the channel to the sensor assembly, enabling real-time and accurate reflection of the gas state within the channel. This improves monitoring speed and real-time performance, while reducing the probability of signal distortion. It also eliminates the need for periodic cleaning or replacement of external transmission pipes. Moreover, with the sensor assembly internally mounted in the mounting cavity, the probability of contamination or interference from external dust and debris is low, significantly reducing the user's cleaning and maintenance burden.

[0021] Based on this, the monitoring input and output ports of the sensor assembly are connected to the gas delivery channel and the mixing chamber, respectively. This configuration ensures that after the gas is monitored by the sensor assembly, it flows into the mixing chamber and enters the gas delivery channel along with the other gases in the mixing chamber. This effectively avoids gas waste in the gas delivery channel and helps improve the gas delivery efficiency of the oxygen mixing module. Simultaneously, the gas forms a flow circulation within the gas delivery channel, sensor assembly, and mixing chamber, preventing noise generated by gas flowing out through narrow orifices and avoiding turbulence during gas discharge. This improves both the gas delivery stability and noise reduction effect of the oxygen mixing module.

[0022] 2. In a preferred embodiment of this application, the air inlet sealing block serves to connect the sensor assembly and the air supply channel. The air inlet sealing block contains an air inlet channel that precisely aligns with the first connecting port and the monitoring input port, improving the sealing performance of gas transmission from the air supply channel to the sensor assembly. This reduces the probability of outside air entering the sensor assembly and gas in the air supply channel escaping through the first connecting port, thereby improving the accuracy of the monitoring data and helping to reduce gas waste in the air supply channel. Furthermore, when gas is transmitted from the air supply channel to the sensor assembly, turbulence may occur due to changes in the flow environment and direction, causing fluctuations in the sensor assembly readings, such as affecting the sensor assembly's accuracy in monitoring airflow velocity. By setting up the air inlet sealing block, the airflow flows within the air inlet channel for a period of time after exiting the first connecting port. The air inlet channel has a certain rectifying effect on the gas, allowing it to enter the monitoring input port more smoothly, reducing the impact of gas turbulence on the sensor assembly's monitoring accuracy and improving the sensor assembly's monitoring accuracy.

[0023] Furthermore, the air intake sealing block completely encloses the connection between the sensor assembly and the air supply channel, preventing contaminants such as droplets and disinfectants in the medical environment from entering the monitoring path through the gap between the monitoring input port and the first connection port. This ensures the stability of the sensor assembly while significantly reducing the risk of external contaminants being inhaled by the user.

[0024] 3. As a preferred embodiment of this application, the first limiting rib provides a stable mounting position for the air intake sealing block, improving the installation stability of the air intake sealing block within the housing. This ensures that the air intake sealing block can stably connect the gas delivery channel and the sensor assembly, contributing to improved monitoring stability of the sensor assembly. Furthermore, during sensor assembly, misalignment between the sensor assembly and the gas delivery channel can easily occur due to installation angle deviations or uneven tightening force. The first limiting rib ensures that once the air intake sealing block is installed on the first limiting rib, the air intake channel is aligned and connected with the monitoring input port and the first communication port. This standardized assembly method significantly reduces assembly errors caused by human operation, improves the consistency of the gas input path of the sensor assembly in each oxygen mixing module, thereby improving the repeatability and reliability of monitoring data. Simultaneously, for portable respiratory therapy devices that require frequent handling, they may be subjected to mechanical vibration during movement or operation. If there are gaps at the sensor assembly connection points, long-term vibration can lead to wear or decreased airtightness of the monitoring output port. The first limiting rib securely fixes the air intake sealing block in the mounting cavity through the surrounding structure. Even under high-frequency vibration environment, the connection between the air intake sealing block and the sensor assembly will not shift or loosen, thereby maintaining stable gas transmission and helping to extend the service life of the sensor assembly.

[0025] 4. In a preferred embodiment of this application, the setting of the limiting rib and the limiting groove enables multi-directional locking of the intake sealing block. When the limiting rib is embedded in the limiting groove, it can prevent the sealing block from sliding along the air delivery channel and also prevent it from rotating around the axis, thereby improving the installation stability of the intake sealing block in the mounting cavity. In addition, the setting of the limiting rib and the limiting groove can also guide the installation of the intake sealing block. When assembling the intake sealing block, it is only necessary to align the limiting groove and the limiting rib. After the limiting rib is inserted into the limiting groove, the installation of the intake sealing block can be completed, saving the assembly personnel the operation of accurately aligning the installation position of the intake sealing block and helping to improve the assembly speed of the intake sealing block.

[0026] 5. In a preferred embodiment of this application, the vent sealing block serves to connect the sensor assembly and the mixing chamber. The vent sealing block contains a venting channel that precisely aligns with the second connection port and the monitoring output port, improving the sealing performance of gas transmission from the sensor assembly to the mixing chamber. This reduces the probability of outside air entering the sensor assembly and the mixing chamber, and also reduces the probability of air escaping from the sensor assembly through the monitoring output port, thus helping to reduce gas waste in the gas delivery channel. Furthermore, the vent sealing block completely encloses the connection between the sensor assembly and the mixing chamber, preventing contaminants such as droplets and disinfectants from the medical environment from entering the monitoring path through the gap between the monitoring output port and the second connection port. This ensures the operational stability of the sensor assembly while significantly reducing the risk of external contaminants being inhaled by the user. Attached Figure Description

[0027] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0028] Figure 1 This is a schematic diagram of the structure of a mixed oxygen module according to one embodiment of this application. Figure 1 ;

[0029] Figure 2 This is a schematic diagram of the structure of a mixed oxygen module according to one embodiment of this application. Figure 2 ;

[0030] Figure 3 This is a cross-sectional view of a portion of the structure of the oxygen mixing module according to one embodiment of this application;

[0031] Figure 4 This is a schematic diagram of the sensor assembly, the inlet sealing block, and the outlet sealing block according to one embodiment of this application;

[0032] Figure 5This is a schematic diagram of the structure of the air inlet sealing block and the air outlet sealing block according to one embodiment of this application;

[0033] Figure 6 This is a schematic diagram of the sensor assembly according to one embodiment of this application.

[0034] List of components and reference numerals:

[0035] 1. Housing; 11. Air inlet; 111. First air inlet; 112. Second air inlet; 12. Limiting rib.

[0036] 2. Mixing chamber; 21. Second connecting port;

[0037] 3 gas transmission channels, 31 first connecting port;

[0038] 4 mounting cavity, 41 first mounting area, 42 second mounting area, 43 third mounting area;

[0039] 5 Sensor assembly, 51 Monitoring input port, 52 Monitoring output port, 53 Sensor, 54 Circuit board;

[0040] 6. Intake sealing block, 61. Intake channel, 62. Sealing ring, 63. Limiting groove;

[0041] 7. First limiting reinforcement bars;

[0042] 8. Vent sealing block; 81. Vent channel; 82. Sealing ring rib;

[0043] 9. Second limiting reinforcement bar. Detailed Implementation

[0044] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0045] Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of this application and the features thereof can be combined with each other.

[0046] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0047] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0048] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can 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. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0049] like Figures 1 to 3 , Figure 6 As shown, an oxygen mixing module for use in a respiratory therapy device includes a housing 1, which includes an air inlet 11 and an air outlet. The housing 1 contains a mixing chamber 2 and a gas delivery channel 3 that are interconnected. The mixing chamber 2 is connected to the air inlet 11, and the gas delivery channel 3 is connected to the air outlet. The housing 1 also includes an installation cavity 4, which contains a gas parameter sensor assembly 5. The monitoring input port 51 of the sensor assembly 5 is connected to the gas delivery channel 3, and the monitoring output port 52 of the sensor assembly 5 is connected to the mixing chamber 2.

[0050] The oxygen mixing module of this application includes a housing 1, within which are interconnected mixing chambers 2 and gas delivery channels 3. The mixing chamber 2 provides a mixing space for oxygen and air input through the air inlet 11, ensuring thorough mixing before delivery to the user via the gas delivery channel 3. The housing 1 also includes a mounting cavity 4, within which a sensor assembly 5 is installed. This isolation of the sensor assembly 5 from the external environment under the protection of the housing 1 significantly reduces interference from external factors such as temperature, humidity, and dust, providing a more stable working environment for parameter monitoring and improving the accuracy of parameter monitoring. Furthermore, for portable respiratory therapy devices that require frequent transport to different work scenarios, fixing the sensor assembly 5 within the mounting cavity 4 of the housing 1 creates an integrated structure, significantly enhancing its vibration resistance and reducing the impact of vibration during transport, thus ensuring the stability of the sensor assembly 5's monitoring accuracy.

[0051] Furthermore, compared to traditional technologies that externally mount the sensor assembly and connect it via a transmission pipe, the sensor assembly 5 in this application is located in the mounting cavity 4 inside the housing 1, closer to the gas supply channel 3. This results in a shorter gas transmission path from the gas supply channel 3 to the sensor assembly 5, enabling real-time and accurate reflection of the gas state within the gas supply channel 3. This improves monitoring speed and real-time performance, and reduces the probability of signal distortion. It also eliminates the need for periodic cleaning or replacement of external transmission pipes. Moreover, since the sensor assembly 5 is internally mounted in the mounting cavity 4, the probability of contamination or interference from external dust and debris is low, significantly reducing the user's cleaning and maintenance burden.

[0052] Based on this, the monitoring input port 51 and monitoring output port 52 of the sensor component 5 are connected to the gas delivery channel 3 and the mixing chamber 2, respectively. This configuration ensures that after being monitored by the sensor component 5, the gas flows into the mixing chamber 2 and enters the gas delivery channel 3 along with the remaining gas in the mixing chamber 2. This effectively avoids gas waste in the gas delivery channel 3 and helps improve the gas delivery efficiency of the oxygen mixing module. Simultaneously, the gas forms a flow circulation within the gas delivery channel 3, the sensor component 5, and the mixing chamber 2, preventing noise generated by gas flowing out through narrow openings and avoiding turbulence during gas discharge. This improves both the gas delivery stability and noise reduction effect of the oxygen mixing module.

[0053] Preferably, the gas parameter sensor assembly 5 of this application can monitor the gas concentration in the gas delivery channel 3, as well as the gas flow rate, temperature, humidity, etc. The type of sensor assembly 5 can be adjusted according to the design requirements of the respiratory therapy device to achieve monitoring of different gas parameters. For example, the sensor assembly 5 can simultaneously monitor the oxygen concentration and gas flow rate in the gas delivery channel 3.

[0054] As a preferred embodiment of this application, such as Figure 2 As shown, the air inlet 11 includes a first air inlet 111 and a second air inlet 112. The first air inlet 111 is used to input air into the mixing chamber 2, and the second air inlet 112 is used to communicate with the oxygen delivery assembly to input oxygen into the mixing chamber 2.

[0055] Preferably, such as Figure 2 As shown, the first air inlet 111 and the second air inlet 112 are located on opposite sides of the mixing chamber 2. This arrangement allows the air and oxygen entering the mixing chamber 2 to collide with each other under inertial force and be fully mixed, which helps to improve the mixing effect of air and oxygen.

[0056] Preferably, the mixing chamber 2 is provided with a fan assembly, which is used to mix the air input from the first air inlet 111 and the oxygen input from the second air inlet 112 and then deliver them to the gas delivery channel 3.

[0057] As a preferred embodiment of this application, such as Figure 3 , Figure 4 , Figure 6 As shown, the mixed oxygen module also includes an air intake sealing block 6, an air intake channel 61 is formed inside the air intake sealing block 6, and a first communication port 31 is opened in the cavity wall of the air delivery channel 3. The monitoring input port 51 of the sensor assembly 5 is connected to the first communication port 31 through the air intake channel 61.

[0058] The air intake sealing block 6 serves to connect the sensor assembly 5 and the air supply channel 3. The air intake sealing block 6 contains an air intake channel 61, precisely aligning with the first connecting port 31 and the monitoring input port 51. This improves the sealing performance of gas transmission from the air supply channel 3 to the sensor assembly 5, reducing the probability of outside air entering the sensor assembly 5 and gas escaping from the air supply channel 3 through the first connecting port 31. This improves the accuracy of the monitoring data and helps reduce gas waste within the air supply channel 3. Furthermore, when gas is transmitted from the air supply channel 3 to the sensor assembly 5, turbulence may occur due to changes in the flow environment and direction, causing fluctuations in the sensor assembly 5's readings, which could affect the sensor assembly 5's accuracy in monitoring airflow velocity. By setting up the air intake sealing block 6, the airflow, after exiting the first connecting port 31, flows within the air intake channel 61 for a period of time. The air intake channel 61 provides a certain degree of rectification for the gas, allowing it to enter the monitoring input port 51 more smoothly. This reduces the impact of gas turbulence on the monitoring accuracy of the sensor assembly 5, thus improving the monitoring accuracy of the sensor assembly 5.

[0059] Furthermore, the air intake sealing block 6 completely encloses the connection between the sensor assembly 5 and the air supply channel 3, preventing contaminants such as droplets and disinfectants in the medical environment from entering the monitoring path through the gap between the monitoring input port 51 and the first connecting port 31. This ensures the working stability of the sensor assembly 5 while significantly reducing the risk of external contaminants being inhaled by the user.

[0060] This embodiment does not limit the structure of the air intake channel 61 or the relative position of the monitoring input port 51 and the first communication port 31. It can be adaptively adjusted according to the structural design of the oxygen mixing module. In one embodiment, such as... Figure 3 As shown, the monitoring input port 51 and the first connecting port 31 are staggered on the same horizontal plane. Therefore, the air intake channel 61 is bent horizontally and aligns with both the first connecting port 31 and the monitoring input port 51. Alternatively, if the first connecting port 31 and the monitoring input port 51 are staggered vertically, the air intake channel 61 can also be bent vertically or obliquely to achieve alignment with both. In other words, by setting the air intake channel 61, the requirements for the relative position of the monitoring input port 51 and the first connecting port 31 are reduced, improving the adaptability of the oxygen mixing module to different types of sensor components 5.

[0061] As a preferred embodiment of this implementation, such as Figure 2 As shown, the mounting cavity 4 is provided with a first limiting rib 7 for installing the air intake sealing block 6. When the air intake sealing block 6 is installed on the first limiting rib 7, the air intake channel 61 is aligned and connected with the first connecting port 31 and the monitoring input port 51 respectively.

[0062] The first limiting rib 7 provides a stable mounting position for the air intake sealing block 6, improving its installation stability within the housing 1. This ensures the air intake sealing block 6 can stably connect the gas delivery channel 3 and the sensor assembly 5, contributing to improved monitoring stability of the sensor assembly 5. Furthermore, during sensor assembly 5 assembly, misalignment between the sensor assembly 5 and the gas delivery channel 3 can easily occur due to installation angle deviations or uneven tightening. The first limiting rib 7 ensures that once the air intake sealing block 6 is installed on the first limiting rib 7, the air intake channel 61 is aligned and connected with the monitoring input port 51 and the first connecting port 31. This standardized assembly method significantly reduces assembly errors caused by human operation, improving the consistency of the gas input path of the sensor assembly 5 in each oxygen mixing module, thereby enhancing the repeatability and reliability of monitoring data. Simultaneously, for portable respiratory therapy devices that require frequent handling, mechanical vibration may occur during movement or operation. If there are gaps at the connection points of the sensor assembly 5, long-term vibration can lead to wear or decreased airtightness of the monitoring output port 52. The first limiting rib 7 firmly fixes the air intake sealing block 6 in the mounting cavity 4 through the surrounding structure. Even in a high-frequency vibration environment, the connection between the air intake sealing block 6 and the sensor assembly 5 will not be displaced or loosened, thereby maintaining stable gas transmission and helping to improve the service life of the sensor assembly 5.

[0063] Preferably, in this embodiment, the first limiting rib 7 and the inner wall of the housing 1 cooperate to form a closed space with an opening at the top, and the air intake sealing block 6 is a flexible structure, with an interference fit between the air intake sealing block 6 and the first limiting rib 7. More preferably, the air intake sealing block 6 is a structure made of rubber material.

[0064] As another preferred embodiment of this implementation, such as Figure 2 , Figure 4 , Figure 5 As shown, one of the housing 1 and the intake sealing block 6 is provided with a limiting groove 63, and the other is provided with a limiting rib 12. The limiting rib 12 cooperates with the limiting groove 63 to limit the intake sealing block 6. The setting of the limiting rib 12 and the limiting groove 63 realizes multi-directional locking of the intake sealing block 6. When the limiting rib 12 is embedded in the limiting groove 63, it can prevent the sealing block from sliding along the direction of the air supply channel 3 and prevent it from rotating around the axis, thereby improving the installation stability of the intake sealing block 6 in the mounting cavity 4. In addition, the setting of the limiting rib 12 and the limiting groove 63 can also guide the installation of the intake sealing block 6. When assembling the intake sealing block 6, it is only necessary to align the limiting groove 63 with the limiting rib 12. After the limiting rib 12 is inserted into the limiting groove 63, the installation of the intake sealing block 6 is completed, saving the assembly personnel from the operation of accurately aligning the installation position of the intake sealing block 6, which helps to improve the assembly speed of the intake sealing block 6.

[0065] This embodiment does not limit the position and number of the limiting groove 63 and the limiting rib 12. In a preferred example, such as Figure 2 , Figure 4 As shown, the limiting groove 63 includes a first groove and a second groove. The first groove abuts against the inner wall of the housing 1, and the second groove is located in the middle of the intake sealing block 6. The limiting rib 12 includes a first rib corresponding to the first groove and a second rib corresponding to the second groove; wherein, the first rib is strip-shaped, and the second rib is cross-shaped. The first rib and the first groove, and the second rib and the second groove, cooperate to achieve multiple limiting of the intake sealing block 6.

[0066] Preferably, such as Figure 5 As shown, the intake sealing block 6 is provided with a sealing ring 62 at the intake end of the intake channel 61. The sealing ring 62 abuts against the cavity wall around the first connecting port 31 of the air delivery channel 3 to further improve the connection and sealing performance between the intake sealing block 6 and the air delivery channel 3.

[0067] As a preferred embodiment of this application, such as Figure 3 , Figure 4 , Figure 6 As shown, the oxygen mixing module also includes an exhaust sealing block 8, an exhaust channel 81 is formed inside the exhaust sealing block 8, and a second communication port 21 is opened in the cavity wall of the mixing chamber 2. The monitoring output port 52 of the sensor assembly 5 is connected to the second communication port 21 through the exhaust channel 81.

[0068] The vent sealing block 8 serves to connect the sensor assembly 5 and the mixing chamber 2. The vent sealing block 8 contains a vent channel 81 that precisely aligns with the second connection port 21 and the monitoring output port 52. This improves the sealing performance of gas transmission from the sensor assembly 5 to the mixing chamber 2, reducing the probability of outside air entering the sensor assembly 5 and the mixing chamber 2. It also reduces the probability of air escaping from the sensor assembly 5 through the monitoring output port 52, helping to minimize gas waste in the gas delivery channel 3. Furthermore, the vent sealing block 8 completely encloses the connection between the sensor assembly 5 and the mixing chamber 2, preventing contaminants such as droplets and disinfectants from the medical environment from entering the monitoring path through the gap between the monitoring output port 52 and the second connection port 21. This ensures the operational stability of the sensor assembly 5 while significantly reducing the risk of external contaminants being inhaled by the user.

[0069] As a preferred embodiment of this implementation, such as Figure 2 As shown, the installation cavity 4 is provided with a second limiting rib 9 for installing the vent sealing block 8. When the vent sealing block 8 is installed in the second limiting rib 9, the vent channel 81 is aligned and connected with the second communication port 21 and the monitoring output port 52 respectively.

[0070] The second limiting rib 9 provides a stable mounting position for the outlet sealing block 8, improving its installation stability within the housing 1. This ensures stable connection between the outlet sealing block 8 and the mixing chamber 2, contributing to improved sealing of the sensor assembly 5. Furthermore, during sensor assembly 5 assembly, misalignment between the sensor assembly 5 and the mixing chamber 2 can easily occur due to installation angle deviations or uneven tightening. The second limiting rib 9 ensures that after the outlet sealing block 8 is installed, the air inlet channel 61 is aligned and connected with the monitoring output port 52 and the second connection port 21. This standardized assembly method significantly reduces assembly errors caused by human operation, improving the consistency of the gas input path of the sensor assembly 5 in each oxygen mixing module, thereby enhancing the repeatability and reliability of monitoring data. Simultaneously, for portable respiratory therapy devices requiring frequent handling, mechanical vibration may occur during movement or operation. If there are gaps at the sensor assembly 5 connection points, long-term vibration can lead to wear or decreased airtightness of the monitoring output port 52. The second limiting rib 9 firmly fixes the gas outlet sealing block 8 in the mounting cavity 4 through the surrounding structure. Even in a high-frequency vibration environment, the connection between the gas outlet sealing block 8 and the sensor assembly 5 will not be displaced or loosened, thereby maintaining stable gas transmission and helping to improve the service life of the sensor assembly 5.

[0071] This embodiment does not limit the structure of the air outlet channel 81 or the relative position of the monitoring output port 52 and the second communication port 21. These can be adaptively adjusted according to the structural design of the oxygen mixing module. In one example, such as... Figures 4 to 6 As shown, the monitoring output port 52 and the second connecting port 21 are vertically offset. Therefore, the air intake channel 61 is vertically bent and aligned with both the second connecting port 21 and the monitoring output port 52. Alternatively, if the second connecting port 21 and the monitoring output port 52 are horizontally offset, the air outlet channel 81 can also be bent horizontally or obliquely to achieve alignment with both. In other words, by setting the air outlet channel 81, the requirements for the relative positions of the monitoring output port 52 and the second connecting port 21 are reduced, improving the adaptability of the oxygen mixing module to different types of sensor components 5.

[0072] Preferably, in this embodiment, the second limiting rib 9 and the inner wall of the shell 1 cooperate to form a closed space with an opening at the top, and the vent sealing block 8 is a flexible structure, with an interference fit between the vent sealing block 8 and the second limiting rib 9. More preferably, the vent sealing block 8 is a structure made of rubber material.

[0073] Furthermore, Figure 2 ,like Figure 4 , Figure 5As shown, the second connecting port 21 is located below the air outlet sealing block 8, and the monitoring output port 52 is located at the top of the air inlet sealing block 6. The air outlet sealing block 8 has a sealing ring rib 82 above the air outlet end of the air outlet channel 81, and the sealing ring rib 82 abuts against the inner wall of the second limiting rib 9. This arrangement allows the sealing ring rib 82, the second limiting rib 9, and the inner wall of the housing 1 to form a relatively sealed space, improving the sealing performance of the air outlet end of the air outlet channel 81. Even if gas leakage occurs between the air outlet channel 81 and the second connecting port 21 due to misalignment factors such as design deviation or installation deviation, the sealing ring rib 82 can still seal the leaked gas, confining it within the closed space at the bottom of the second limiting rib 82, thereby reducing gas dissipation and consumption.

[0074] In a preferred embodiment of this application, the housing 1 includes an upper housing and a lower housing, and the mounting cavity 4 is located in the space formed by the upper housing and the lower housing.

[0075] The upper and lower housings, when fitted together, form a relatively enclosed space, which helps improve the airtightness of the mounting cavity 4. This, in turn, enhances the enclosure of the sensor assembly 5 within the mounting cavity 4 by the housing 1, reducing the impact of external impacts on the sensor assembly 5. Furthermore, the separate design of the upper and lower housings helps reduce the assembly pressure on the sensor assembly 5 and other components installed inside the housing 1. During assembly, the lower housing can be placed on the assembly surface first, and then all components, including the sensor assembly 5, can be assembled inside the housing 1 according to their preset positions. The upper and lower housings can then be assembled, reducing assembly constraints and improving assembly efficiency.

[0076] As a preferred embodiment of this application, such as Figure 2 As shown, the mounting cavity 4 and the mixing cavity 2 are located on the same side of the gas transmission channel 3. Along the extension direction of the gas transmission channel 3, the length of the gas transmission channel 3 is greater than the length of the mounting cavity 4 or the length of the mixing cavity 2, but not greater than the sum of the lengths of the mounting cavity 4 and the mixing cavity 2.

[0077] In this embodiment, the horizontal projection of the gas delivery channel 3 at least partially overlaps with the horizontal projections of the mounting cavity 4 and the mixing cavity 2, respectively. Furthermore, the sensor assembly 5 and the mixing cavity 2 are located on the same side of the gas delivery channel 3, which shortens the distance between the mixing cavity 2 and the gas delivery channel 3, as well as between the sensor assembly 5 and the gas delivery channel 3. The gas delivery channel 3 is designed to allow the gas to undergo rectification over a certain distance before being supplied to the user. In this embodiment, the gas delivery channel 3 has ample rectification space, and the close proximity between the mixing cavity 2 and the gas delivery channel 3, as well as between the sensor assembly 5 and the gas delivery channel 3, allows the gas in the mixing cavity 2 to move quickly into the gas delivery channel 3, and a portion of the gas in the gas delivery channel 3 to move quickly into the sensor assembly 5. Moreover, the overall structural layout of the oxygen mixing module in this embodiment is relatively compact, which helps in the miniaturization of the oxygen mixing module and shortens the gas transmission distance from the gas delivery channel 3 to the sensor assembly 5, improving the real-time monitoring performance of the sensor assembly 5.

[0078] As a preferred embodiment of this application, such as Figure 2 , Figure 3 As shown, the oxygen mixing module also includes an inlet sealing block 6 and an outlet sealing block 8. An inlet channel 61 is formed inside the inlet sealing block 6, and an outlet channel 81 is formed inside the outlet sealing block 8. The sensor assembly 5 is connected to the gas delivery channel 3 and the mixing chamber 2 through the inlet channel 61 and the outlet channel 81, respectively. The mounting cavity 4 is provided with a first mounting area 41 near the gas delivery channel 3, a second mounting area 42 near the mixing chamber 2, and a third mounting area 43 that abuts against the first mounting area 41 and the second mounting area 42, respectively. The inlet sealing block 6 is installed in the first mounting area 41, the outlet sealing block 8 is installed in the second mounting area 42, and the sensor assembly 5 is installed in the third mounting area 43.

[0079] The placement of the inlet sealing block 6 and the outlet sealing block 8 improves the sealing performance of the sensor assembly 5 at the connections with the gas delivery channel 3 and the mixing chamber 2, respectively, thus enhancing the monitoring stability of the sensor assembly 5. The first mounting area 41, the second mounting area 42, and the third mounting area 43 provide independent installation spaces for the inlet sealing block 6, the outlet sealing block 8, and the sensor assembly 5, respectively. The first mounting area 41, located close to the gas delivery channel 3, shortens the distance between the gas delivery channel 3 and the inlet sealing block 6, enabling rapid gas delivery from the gas delivery channel 3 to the sensor assembly 5. Similarly, the second mounting area 42, located close to the mixing chamber 2, shortens the distance between the sensor assembly 5 and the mixing chamber 2, enabling rapid gas delivery from the sensor assembly 5 to the mixing chamber 2 and improving gas parameter monitoring efficiency. The third mounting area 43, adjacent to both the first mounting area 41 and the second mounting area 42, further enhances the utilization rate of the internal space of the mounting chamber 4, making the overall structure of the oxygen mixing module more compact.

[0080] Preferably, the first installation area 41 is separated from the gas delivery channel 3 by the inner wall of the housing 1, and the second installation area 42 is separated from the mixing chamber 2 by the inner wall of the housing 1.

[0081] As a preferred embodiment of this application, such as Figure 4 , Figure 6 As shown, the sensor assembly 5 includes a connected sensor 53 and a circuit board 54. The circuit board 54 is located above and covers the sensor 53. The projection of the circuit board 54 in the vertical direction at least partially overlaps with the air inlet sealing block 6 and the air outlet sealing block 8.

[0082] By placing the circuit board 54 above the sensor 53, the distance between the sensor 53 and the circuit board 54 is greatly shortened, allowing data signals from the sensor 53 to be quickly transmitted to the circuit board 54. Furthermore, the circuit board 54's location at the top of the mounting cavity 4 provides some protection for the circuit board 54 from the outer casing, reducing interference from the external environment and effectively improving its operational stability. In addition, the vertical projection of the circuit board 54 at least partially overlaps with the intake sealing block 6 and the exhaust sealing block 8, allowing the circuit board 54 to fully utilize the mounting space above the intake sealing block 6 and the exhaust sealing block 8, reducing wasted space within the mounting cavity 4, improving the space utilization rate of the oxygen mixing module, and contributing to its miniaturization.

[0083] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0084] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0085] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. An oxygen mixing module for use in a respiratory therapy device, the oxygen mixing module comprising a housing, the housing including an air inlet and an air outlet, characterized in that, The housing includes an interconnected mixing chamber and an air supply channel. The mixing chamber is connected to the air inlet, and the air supply channel is connected to the air outlet. The housing also includes a mounting cavity, in which a gas parameter sensor assembly is provided. The monitoring input port of the sensor assembly is connected to the gas delivery channel, and the monitoring output port of the sensor assembly is connected to the mixing cavity.

2. The oxygen mixing module according to claim 1, characterized in that, The oxygen mixing module also includes an air intake sealing block, an air intake channel is formed inside the air intake sealing block, and a first communication port is opened in the cavity wall of the air intake channel. The monitoring input port of the sensor assembly is connected to the first communication port through the air intake channel.

3. The oxygen mixing module according to claim 2, characterized in that, The mounting cavity is provided with a first limiting rib for installing the air intake sealing block. When the air intake sealing block is installed on the first limiting rib, the air intake channel is aligned and connected to the first communication port and the monitoring input port respectively.

4. The oxygen mixing module according to claim 2, characterized in that, One of the housing and the air intake sealing block is provided with a limiting groove, and the other is provided with a limiting rib. The limiting rib cooperates with the limiting groove to limit the air intake sealing block.

5. The oxygen mixing module according to claim 1, characterized in that, The oxygen mixing module also includes an exhaust sealing block, an exhaust channel is formed inside the exhaust sealing block, a second communication port is opened in the cavity wall of the mixing chamber, and the monitoring output port of the sensor assembly is connected to the second communication port through the exhaust channel.

6. The oxygen mixing module according to claim 5, characterized in that, The mounting cavity is provided with a second limiting rib for mounting the vent sealing block. When the vent sealing block is installed in the second limiting rib, the vent channel is aligned and connected with the second communication port and the monitoring output port respectively.

7. The oxygen mixing module according to claim 1, characterized in that, The housing includes an upper housing and a lower housing, and the mounting cavity is located within the space formed by the upper housing and the lower housing.

8. The oxygen mixing module according to claim 1, characterized in that, The mounting cavity and the mixing cavity are located on the same side of the gas delivery channel. Along the extension direction of the gas delivery channel, the length of the gas delivery channel is greater than the length of the mounting cavity or the length of the mixing cavity, but not greater than the sum of the lengths of the mounting cavity and the mixing cavity.

9. The oxygen mixing module according to claim 1, characterized in that, The oxygen mixing module also includes an air inlet sealing block and an air outlet sealing block. An air inlet channel is formed inside the air inlet sealing block, and an air outlet channel is formed inside the air outlet sealing block. The sensor assembly is connected to the gas delivery channel and the mixing chamber through the air inlet channel and the air outlet channel, respectively. The mounting cavity is provided with a first mounting area near the gas delivery channel, a second mounting area near the mixing chamber, and a third mounting area that abuts against the first mounting area and the second mounting area respectively. The air inlet sealing block is mounted in the first mounting area, the air outlet sealing block is mounted in the second mounting area, and the sensor assembly is mounted in the third mounting area.

10. The oxygen mixing module according to claim 9, characterized in that, The sensor assembly includes a connected sensor and a circuit board. The circuit board is located above and covers the sensor. The vertical projection of the circuit board at least partially overlaps with the air inlet sealing block and the air outlet sealing block.

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