Respiratory treatment equipment

Abstract

The utility model belongs to the technical field of medical instruments, and discloses respiratory therapy equipment which comprises a shell and a humidifier, a containing space is formed in the shell, the humidifier is located outside the shell, and the respiratory therapy equipment further comprises a liquid level detection assembly used for detecting the liquid level in the humidifier. The shell is provided with a detection position located between the humidifier and the liquid level detection assembly, the liquid level detection assembly comprises a sealing part and a sensing part at least partially located in the containing space, the sensing part comprises a circuit board located in the containing space, and the sealing part can seal the area where the detection position is located; therefore, the phenomenon that liquid enters the respiratory therapy equipment through the detection position when the respiratory therapy equipment is wiped or in other situations with liquid is avoided, the phenomenon that a circuit in the respiratory therapy equipment is short-circuited or electrical components are damaged is avoided, the service life of the respiratory therapy equipment is guaranteed, and the respiratory therapy equipment is convenient to use. And meanwhile, the safety of the respiratory treatment equipment is improved, so that the use experience of a user is improved.

Description

Technical Field

[0001] This application belongs to the technical field of medical devices, specifically relating to a respiratory therapy device. Background Technology

[0002] Respiratory therapy equipment is a medical device used to treat and assist in the treatment of respiratory diseases. It plays a vital role in the medical field, mainly by providing patients with a humidified and heated treatment environment to improve their respiratory status and enhance their comfort.

[0003] Currently, respiratory therapy equipment generally includes a main unit and a humidifier. The gas generated by the main unit flows into the humidifier to humidify it, and then the humidified gas flows to the patient through the breathing tubing. To improve the patient's experience, a liquid level detection device is usually installed in the main unit to detect the liquid level inside the humidifier. Existing liquid level detection devices are usually infrared transmitters and receivers located inside the main unit. The infrared transmitter and receiver can emit infrared light into the humidifier and receive infrared light reflected from the humidifying liquid inside the humidifier to detect the liquid level using infrared reflectivity. However, because the infrared transmitter needs to emit infrared light into the humidifier and receive infrared light reflected from the humidifying liquid inside the humidifier, a window needs to be installed on the outer casing of the main unit to allow infrared light to pass through. This means that when wiping the respiratory therapy equipment or in other situations involving liquid, liquid may enter the main unit through the window, potentially causing short circuits or damage to electrical components inside the main unit, thus affecting the lifespan of the respiratory therapy equipment. Utility Model Content

[0004] This application provides a respiratory therapy device to extend the service life of the respiratory therapy device.

[0005] The technical solution adopted in this application is as follows:

[0006] A respiratory therapy device includes a housing and a humidifier. The housing has an internal receiving space, and the humidifier is located outside the housing. The device further includes a liquid level detection component for detecting the liquid level inside the humidifier. The housing has a detection position located between the humidifier and the liquid level detection component. The liquid level detection component includes a seal and a sensor at least partially located within the receiving space. The sensor includes a circuit board located within the receiving space. The seal is capable of sealing the area where the detection position is located.

[0007] By adopting the above technical solution, the sealing component can seal the area where the detection position is located, thereby preventing liquid from entering the respiratory therapy equipment through the detection position when wiping or in other liquid-containing situations. This avoids short circuits or damage to electrical components inside the respiratory therapy equipment, thus ensuring the service life of the respiratory therapy equipment and increasing its safety, thereby improving the user experience.

[0008] Optionally, the sensing element further includes a sensing area disposed on the circuit board. At least two sensing areas are disposed in the vertical direction, and the capacitance value of the sensing area can change with the change of liquid level in the humidifier, so as to detect the liquid level in the humidifier by the change of capacitance value of the sensing area.

[0009] By adopting the above technical solution, since there are at least two sensing areas arranged vertically, one sensing area can correspond to the minimum liquid level setting of the humidifier, and the other sensing area can correspond to the maximum liquid level setting of the humidifier. This ensures the therapeutic effect of the respiratory therapy device on the patient, thereby improving the user experience. Furthermore, the capacitance value of the sensing area can change with the change of liquid level in the humidifier, thus realizing the detection of the liquid level in the humidifier by utilizing the change of capacitance value. This allows for real-time detection of changes in the liquid level in the humidifier, making it convenient for users to obtain the amount of remaining humidifying liquid inside the humidifier in a timely manner.

[0010] Optionally, the sensing element further includes a conductive element capable of transmitting signals, the conductive element contacting the sensing area, the detection position penetrating through it in the direction of the housing wall thickness, and the conductive element extending into or out of the detection position from the inside of the housing.

[0011] By adopting the above technical solution, since the conductive element can transmit signals, and the conductive element contacts the sensing area and extends into or out of the detection position, the sensing area becomes more sensitive under the action of the conductive element transmitting signals. This improves the response efficiency of the sensing area's capacitance value to changes in the liquid level inside the humidifier, thereby achieving the effect of timely reminding the user that the liquid level has reached the maximum or minimum level, thus improving the user experience.

[0012] Optionally, the conductive element is a spring pin located in the sensing area, and the sealing element is sleeved on the outside of the spring pin and is interference-fitted with the spring pin.

[0013] By adopting the above technical solution, the transmission effect of the conductive element, which is a spring needle located in the sensing area, is enhanced, thereby improving the sensitivity of the sensing area. This further improves the response efficiency of the sensing area's capacitance value to changes in the humidifier's internal liquid level, further avoiding the impact of high or low liquid levels in the humidifier on the patient's experience, thus further improving the patient's user experience. Furthermore, since the sealing element is fitted outside the spring needle with an interference fit, the sealing between the spring needle and the detection position is increased, ensuring the sealing of the detection position and further extending the service life of the respiratory therapy equipment.

[0014] Optionally, the conductive element is a conductive column integrally formed into the sealing element.

[0015] By adopting the above technical solution, since the conductive component is integrally formed into the conductive column of the sealing component, on the one hand, the sealing effect of the sealing component on the detection position is guaranteed, so as to prevent liquid from entering the housing through the detection position, thereby ensuring the service life of the respiratory therapy equipment. On the other hand, the conductive column can also transmit signals, thereby improving the sensitivity of the sensing area. In addition, by integrating the conductive component into the sealing component, the number of parts to be assembled during the assembly of the respiratory therapy equipment is reduced, thereby improving the production efficiency of the respiratory therapy equipment.

[0016] Optionally, the conductive element includes a sealing conductive portion disposed on the sealant and an elastic conductive portion disposed on the sensing area. The elastic conductive portion is conductive, and the sealing conductive portion has an opening facing the circuit board and the elastic conductive portion extends into the receiving cavity.

[0017] By adopting the above technical solution, since the sealing conductive part has an accommodating cavity with an opening facing the circuit board, and the elastic conductive part extends into the accommodating cavity, on the one hand, the sealing conductive part can seal the elastic conductive part to increase the sealing effect on the detection position, and on the other hand, it can also improve the sensitivity of the sensing area. Furthermore, when the sealing conductive part extends into or out of the detection position, it can also support and position the elastic conductive part to increase the stability of the elastic conductive part, thereby ensuring the signal transmission effect of the elastic conductive part, and further improving the sensitivity of the sensing area.

[0018] Optionally, the sealing and conductive part includes a first section and a second section with an outer diameter greater than that of the first section, the wall thickness of the second section being equal to that of the first section, and the second section being connected to the sealing element.

[0019] By adopting the above technical solution, in the scheme where the conductive element extends out of the detection position, after the humidifier is installed on the housing, the humidifier will apply pressure to the sealing conductive part towards the circuit board, so that the sealing conductive part is pressed against the humidifier and deformed towards the direction of the circuit board. The outer diameter of the second section is set to be larger than the outer diameter of the first section, and the wall thickness of the second section is equal to the wall thickness of the first section. This allows a space to be formed at the second section for the deformation of the sealing conductive part, ensuring that the sealing conductive part can deform towards the direction of the circuit board, thus ensuring that the humidifier is installed in place. Furthermore, the second section can also increase the ability of the sealing conductive part to recover its deformation, ensuring that the sealing conductive part can press against the humidifier, thereby improving the signal transmission effect of the conductive element and further improving the sensitivity of the sensing area.

[0020] Optionally, the sensing element further includes a transmitter and receiver disposed on the circuit board. At least two transmitters and receivers are disposed in the vertical direction. The transmitters and receivers are capable of transmitting signals to the humidifier and receiving signals transmitted by the humidifier. The detection position penetrates through the housing wall in the thickness direction. The sealing member is a transparent component that is sealed to the detection position so as to detect the liquid level of the humidifier by means of the change in signal reflectivity.

[0021] By adopting the above technical solution, since at least two transmitters and receivers are arranged vertically, one transmitter and receiver can correspond to the minimum liquid level setting of the humidifier, and the other transmitter and receiver can correspond to the maximum liquid level setting of the humidifier. This ensures the therapeutic effect of the respiratory therapy device on the patient, thereby improving the user experience. Furthermore, the reflectivity of the signal emitted by the transmitter and receiver changes with the liquid level, thus enabling the detection of the liquid level in the humidifier using changes in signal reflectivity. This allows for real-time monitoring of changes in the liquid level in the humidifier, facilitating timely information on the amount of remaining humidifier fluid. Simultaneously, the detection position penetrates the shell wall along its thickness, and the sealing element is a transparent component sealed to the detection position. This allows the signal emitted by the transmitter and receiver to pass through the transparent component and be conducted into the humidifier, ensuring the detection of liquid level changes using signal reflectivity. Additionally, the sealing of the detection position is enhanced, preventing liquid from entering the shell and ensuring the lifespan of the respiratory therapy device.

[0022] Optionally, the sensing element further includes a sensor disposed on the circuit board and a float capable of floating in the humidifier. At least two sensors are disposed in the vertical direction. When the float is opposite to any of the sensors, the state of the sensor changes, so as to detect the liquid level in the humidifier by means of the state change of the sensor.

[0023] By adopting the above technical solution, since at least two sensors are arranged vertically, one sensor can correspond to the minimum liquid level setting of the humidifier, and the other sensor can correspond to the maximum liquid level setting of the humidifier. This enables the detection of the minimum and maximum liquid levels of the humidifier, avoiding the phenomenon of insufficient or excessive humidifying fluid inside the humidifier, thus ensuring the therapeutic effect on the patient. Since the state of the sensor changes when the float is relative to either sensor, the liquid level in the humidifier can be detected by utilizing the state change of the sensor. This allows the user to be reminded whether to add or stop adding humidifying fluid based on the sensor's state change, thereby improving the user experience.

[0024] Optionally, the sensor is a reed switch, and the float includes a float body and a magnetic component disposed on the float body. The magnetic component can apply a magnetic force to the reed switch to change the state of the reed switch.

[0025] By adopting the above technical solution, since the sensor is a reed switch, the production cost of the respiratory therapy equipment is reduced, and the stability of liquid level detection in the humidifier is increased. Since the float includes a float body and a magnetic component that can apply magnetic force to the reed switch, on the one hand, the float can float up and down with the change of liquid level, and on the other hand, the float can apply magnetic force to the corresponding reed switch to change the state of the reed switch.

[0026] Optionally, the housing is provided with a limiting rib extending circumferentially along the seal, and the seal is disposed within the limiting rib.

[0027] By adopting the above technical solution, since the sealing element is configured within the limiting rib, and the limiting rib extends circumferentially along the sealing element, on the one hand, the sealing element is positioned to increase the connection stability between the sealing element and the housing. At the same time, the limiting rib can also serve as a visual reminder when installing the sealing element, so as to facilitate the installation of the sealing element in place. On the other hand, it can also increase the contact area between the sealing element and the housing to improve the sealing effect of the sealing element on the detection position, further preventing liquid from entering the housing, thereby improving the service life of the respiratory therapy equipment.

[0028] Optionally, a positioning part is provided on the inner side of the housing, and the circuit board is provided with a mating part that can cooperate with the positioning part to position the circuit board.

[0029] By adopting the above technical solution, when installing the circuit board, the mating part is first aligned with the positioning part, and then a force is applied to the circuit board in the direction of the positioning part so that the circuit board moves toward the positioning part. Finally, the positioning part and the mating part cooperate to achieve the positioning of the circuit board, and then the circuit board is fixed. This achieves the effect of facilitating the fixing of the circuit board, thereby improving the assembly efficiency of the respiratory therapy equipment and thus improving the production efficiency of the respiratory therapy equipment.

[0030] Optionally, a connecting post is provided on the inner side of the housing, and a through hole is provided on the circuit board corresponding to the connecting post, through which a screw threaded to the connecting post is passed.

[0031] By adopting the above technical solution, the circuit board is fixedly connected to the housing by a screw threaded into the through hole, thereby increasing the connection stability between the circuit board and the housing and reducing the difficulty of fixing the circuit board, thus improving the production efficiency of the respiratory therapy equipment; and by setting the connecting post, the connection area between the screw and the housing is increased, thereby improving the fixing effect of the circuit board.

[0032] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0033] 1. The respiratory therapy device of this application includes a housing and a humidifier. The housing forms an internal receiving space, and the humidifier is located outside the housing. The respiratory therapy device also includes a liquid level detection component for detecting the liquid level inside the humidifier. The housing has a detection position located between the humidifier and the liquid level detection component. The liquid level detection component includes a seal and a sensing element at least partially located in the receiving space. The sensing element includes a circuit board located in the receiving space. The seal can seal the area where the detection position is located, thereby preventing liquid from entering the respiratory therapy device through the detection position when wiping the respiratory therapy device or in other liquid-containing situations. This avoids short circuits or damage to electrical components inside the respiratory therapy device, thus ensuring the service life of the respiratory therapy device and increasing its safety to improve the user experience.

[0034] 2. The sensing element in this application also includes a sensing area disposed on the circuit board. At least two sensing areas are disposed in the vertical direction, and the capacitance value of the sensing area can change with the change of liquid level in the humidifier. The liquid level in the humidifier can be detected by the change of capacitance value of the sensing area. Thus, one sensing area can be set to correspond to the minimum liquid level of the humidifier, and the other sensing area can be set to correspond to the maximum liquid level of the humidifier, so as to ensure the therapeutic effect of the respiratory therapy device on the patient and improve the user experience. Moreover, the capacitance value of the sensing area can change with the change of liquid level in the humidifier, thereby realizing the detection of liquid level in the humidifier by the change of capacitance value, so as to detect the change of liquid level in the humidifier in real time, and make it convenient for users to obtain the amount of remaining humidifying liquid inside the humidifier in a timely manner.

[0035] 3. The sensing element in this application also includes a conductive element capable of transmitting signals. The conductive element contacts the sensing area, and the detection position penetrates it in the direction of the housing wall thickness. The conductive element extends into or out of the detection position from the inside of the housing, thereby making the sensing area more sensitive under the action of the conductive element transmitting signals. This improves the response efficiency of the capacitance value of the sensing area to changes in the liquid level inside the humidifier, thereby achieving the effect of timely reminding the user that the liquid level has reached the maximum or minimum level, thus improving the user experience. Attached Figure Description

[0036] 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:

[0037] Figure 1 This is a schematic diagram of the overall structure of the respiratory therapy device described in this application;

[0038] Figure 2 This is an exploded view of a portion of the structure of the respiratory therapy device described in one embodiment of this application, mainly showing the relationship between the spring needle and the circuit board;

[0039] Figure 3 This is a partial structural cross-sectional view of the respiratory therapy device described in one embodiment of this application;

[0040] Figure 4 This is a schematic diagram of the connection structure between the circuit board and the spring pin in one embodiment of this application;

[0041] Figure 5 This is a schematic diagram of the inner structure of the shell in one embodiment of this application, mainly showing the shape of the limiting rib;

[0042] Figure 6This is a partial exploded view of the respiratory therapy device described in one embodiment of this application, mainly showing the relationship between the conduction column and the sealing element;

[0043] Figure 7 This is a schematic diagram of the inner structure of the shell in one embodiment of this application, mainly showing another shape of the limiting rib;

[0044] Figure 8 This is a partial exploded view of the respiratory therapy device described in one embodiment of this application, mainly showing the relationship between the sealing and conductive part and the sealing element;

[0045] Figure 9 This is a cross-sectional view of the seal described in one embodiment of this application;

[0046] Figure 10 This is a partial exploded view of the respiratory therapy device described in another embodiment of this application;

[0047] Figure 11 This is a schematic diagram of the inner structure of the housing according to another embodiment of this application, mainly showing the relationship between the seal and the housing;

[0048] Figure 12 This is a partial structural cross-sectional view of the respiratory therapy device described in another embodiment of this application;

[0049] Figure 13 This is a partial exploded view of the respiratory therapy device described in another embodiment of this application;

[0050] Figure 14 This is a partial structural cross-sectional view of the respiratory therapy device described in another embodiment;

[0051] Figure 15 This is a schematic diagram of the inner structure of the housing described in another embodiment of this application.

[0052] Figure label:

[0053] 1. Housing; 11. Detection position; 12. Limiting rib; 13. Positioning part; 14. Connecting post; 2. Humidifier; 3. Seal; 31. Sealing conduction part; 311. First section; 312. Second section; 313. Receiving cavity; 4. Sensing element; 41. Circuit board; 411. Mating part; 412. Screw; 42. Sensing area; 421. Elastic conduction part; 422. Spring pin; 423. Conducting post; 43. Transmitter and receiver; 44. Sensor; 45. Float; 5. Electrical adapter. Detailed Implementation

[0054] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0055] Many specific details are set forth in the following description in order to provide a full 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.

[0056] 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.

[0057] 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.

[0058] 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 "implementation," "example," "a particular embodiment," "example," or "specific example," etc., indicate that the 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.

[0059] Reference Figures 1 to 15 A respiratory therapy device is disclosed, comprising a housing 1 and a humidifier 2. The housing 1 forms an internal receiving space, and the humidifier 2 is located outside the housing 1. The respiratory therapy device also includes a liquid level detection component for detecting the liquid level inside the humidifier 2. The housing 1 has a detection position 11 located between the humidifier 2 and the liquid level detection component. The liquid level detection component includes a seal 3 and a sensor 4 located at least partially in the receiving space. The sensor 4 includes a circuit board 41 located in the receiving space. The seal 3 is capable of sealing the area where the detection position 11 is located.

[0060] Since the seal 3 can seal the area where the detection position 11 is located, it prevents liquid from entering the respiratory therapy device through the detection position 11 when wiping the device or in other situations where there is liquid. This avoids short circuits or damage to electrical components inside the respiratory therapy device, thus ensuring the service life of the respiratory therapy device and increasing its safety to improve the user experience.

[0061] This application does not specify a particular method for detecting the liquid level using the sensor 4, and it can adopt any of the following embodiments:

[0062] Implementation Method 1, in this implementation method, refer to Figures 2 to 9 The sensor 4 also includes a sensing area 42 disposed on the circuit board 41. At least two sensing areas 42 are disposed in the vertical direction, and the capacitance value of the sensing area 42 can change with the change of liquid level in the humidifier 2, so as to detect the liquid level in the humidifier 2 by the change of capacitance value of the sensing area 42.

[0063] Since there are at least two sensing areas 42 arranged vertically, one sensing area 42 can correspond to the minimum liquid level setting of the humidifier 2, and the other sensing area 42 can correspond to the maximum liquid level setting of the humidifier 2, so as to ensure the therapeutic effect of the respiratory therapy device on the patient and thus improve the user experience; and the capacitance value of the sensing area 42 can change with the change of liquid level in the humidifier 2, thereby realizing the detection of liquid level in the humidifier 2 by utilizing the change of capacitance value, so as to detect the change of liquid level in the humidifier 2 in real time, and make it convenient for users to obtain the amount of remaining humidifying liquid inside the humidifier 2 in a timely manner.

[0064] Preferably, there are two sensing zones 42 spaced apart in the vertical direction, so as to reduce the production cost of the respiratory therapy equipment while ensuring the range of liquid level detection.

[0065] In a preferred embodiment, refer to Figures 2 to 9 The sensing element 4 also includes a conductive element capable of transmitting signals. The conductive element contacts the sensing area 42, and the detection position 11 penetrates it in the wall thickness direction of the housing 1. The conductive element extends into or out of the detection position 11 from the inside of the housing 1.

[0066] It is understandable that the number of conductive elements is the same as the number of sensing areas 42, and the conductive elements and sensing areas 42 are set in a one-to-one correspondence. The sealing element 3 is located between the circuit board 41 and the housing 1 to seal the area where the detection position 11 is located.

[0067] Since the conductive element can transmit signals, it contacts the sensing area 42 and extends into or out of the detection position 11. This makes the sensing area 42 more sensitive under the signal transmission effect of the conductive element, thereby improving the response efficiency of the capacitance value of the sensing area 42 to the change of the liquid level inside the humidifier 2. This can achieve the effect of timely reminding the user that the liquid level has reached the maximum or minimum level, thereby improving the user experience.

[0068] Preferably, the end of the conductive element away from the circuit board 41 extends out from the inside of the housing 1 to the detection position 11, so that the end of the conductive element away from the circuit board 41 can contact the outer wall of the humidifier 2, thereby further improving the signal transmission effect and further improving the sensitivity of liquid level detection.

[0069] This application does not impose specific limitations on the structure of the conductive element, which can adopt any of the following embodiments:

[0070] Implementation Example 1, in this implementation example, refer to Figures 2 to 4 The conductive element is a spring needle 422 located in the sensing area 42, and the sealing element 3 is sleeved on the outside of the spring needle 422 and is interference-fitted with the spring needle 422.

[0071] Since the conductive element is a spring needle 422 located in the sensing area 42, the signal transmission effect of the conductive element is increased, thereby further improving the sensitivity of the sensing area 42. This further improves the response efficiency of the capacitance value of the sensing area 42 to changes in the liquid level inside the humidifier 2, further avoiding the impact on the patient's user experience due to high or low liquid levels in the humidifier 2, and thus further improving the patient's user experience. Furthermore, since the sealing element 3 is fitted outside the spring needle 422 and has an interference fit with it, the sealing between the spring needle 422 and the detection position 11 is increased, ensuring the sealing of the detection position 11, and thus further ensuring the service life of the respiratory therapy device.

[0072] Implementation Example 2, in this implementation example, refer to Figure 6 The conductive element is an integrally formed conductive column 423 of the sealing element 3. On the one hand, it ensures the sealing effect of the sealing element 3 on the detection position 11 to prevent liquid from entering the interior of the housing 1 through the detection position 11, thereby ensuring the service life of the respiratory therapy device. On the other hand, the conductive column 423 can also transmit signals to improve the sensitivity of the sensing area 42. In addition, by integrating the conductive element into the sealing element 3, the number of components to be assembled during the assembly of the respiratory therapy device is reduced, thereby improving the production efficiency of the respiratory therapy device.

[0073] Implementation Example 3, in this implementation example, refer to Figure 8 and Figure 9The conductive component includes a sealing conductive portion 31 disposed on the sealing component 3 and an elastic conductive portion 421 disposed on the sensing area 42. The elastic conductive portion 421 is conductive. The sealing conductive portion 31 has a receiving cavity 313 with an opening facing the circuit board 41. The elastic conductive portion 421 extends into the receiving cavity 313. On the one hand, the sealing conductive portion 31 can seal the elastic conductive portion 421 to increase the sealing effect on the detection position 11. On the other hand, it can also improve the sensitivity of the sensing area 42. When the sealing conductive portion 31 extends into or out of the detection position 11, the sealing conductive portion 31 can also support and position the elastic conductive portion 421 to increase the stability of the elastic conductive portion 421, thereby ensuring the signal transmission effect of the elastic conductive portion 421 and further improving the sensitivity of the sensing area 42.

[0074] This application does not specifically limit the structure of the elastic conductive part 421; preferably, refer to... Figure 8 The elastic conductive part 421 is a spring to ensure effective signal transmission. Of course, the elastic conductive part 421 can also be other elastic structures that can conduct electricity, such as an elastic metal sheet.

[0075] Furthermore, refer to Figure 9 The sealing and conductive part 31 includes a first section 311 and a second section 312 with an outer diameter greater than that of the first section 311. The wall thickness of the second section 312 is equal to that of the first section 311, and the second section 312 is connected to the sealing member 3.

[0076] In the scheme where the conductive element extends out of the detection position 11, after the humidifier 2 is installed into the housing, the humidifier 2 applies pressure to the sealing conductive part 31 in the direction of the circuit board 41, so that the sealing conductive part 31 presses against the humidifier 2 and deforms in the direction of the circuit board 41. The outer diameter of the second segment 312 is set to be larger than the outer diameter of the first segment 311, and the wall thickness of the second segment 312 is equal to the wall thickness of the first segment 311. This allows a space to be formed at the second segment 312 for the sealing conductive part 31 to deform, ensuring that the sealing conductive part 31 can deform in the direction of the circuit board 41, thus ensuring that the humidifier 2 is installed in place. The second segment 312 also increases the ability of the sealing conductive part 31 to recover its deformation, ensuring that the sealing conductive part 31 can press against the humidifier 2, thereby improving the signal transmission effect of the conductive element and further improving the sensitivity of the sensing area 42.

[0077] Specifically, the second segment 312 is fixedly connected to the seal 3, and the end of the first segment 311 away from the second segment 312 extends into or out of the detection position 11 to improve the sealing effect on the detection position 11.

[0078] In this embodiment, preferably, the sealing element 3 is made of silicone or rubber material to ensure a sealing effect on the detection position 11.

[0079] Implementation Method Two: In this implementation method, refer to... Figures 10 to 12 The sensor 4 also includes a transmitter and receiver 43 disposed on the circuit board 41. At least two transmitters and receivers 43 are disposed in the vertical direction. The transmitter and receiver 43 can transmit signals to the humidifier 2 and receive signals transmitted by the humidifier 2. The detection position 11 penetrates through the housing 1 in the wall thickness direction. The sealing member 3 is a transparent member that is sealed to the detection position 11 so as to detect the liquid level of the humidifier 2 by means of the change in signal reflectivity.

[0080] Since at least two transmitters and receivers 43 are arranged vertically, one transmitter and receiver 43 can correspond to the minimum liquid level setting of the humidifier 2, and the other transmitter and receiver 43 can correspond to the maximum liquid level setting of the humidifier 2. This ensures the therapeutic effect of the respiratory therapy device on the patient, thereby improving the user experience. Furthermore, the reflectivity of the signal emitted by the transmitter and receiver 43 can change with the liquid level, thus realizing the detection of the liquid level in the humidifier 2 by utilizing the change in signal reflectivity. This allows for real-time detection of changes in the liquid level in the humidifier 2, making it convenient for users to obtain the amount of remaining humidifying liquid inside the humidifier 2 in a timely manner. At the same time, the detection position 11 penetrates through the wall thickness of the housing 1, and the sealing member 3 is a transparent component that is sealed to the detection position 11. This allows the signal emitted by the transmitter and receiver 43 to pass through the transparent component and be conducted into the humidifier 2, ensuring that the liquid level change can be detected by utilizing the signal reflectivity. In addition, it increases the sealing of the detection position 11, preventing the liquid level from entering the housing 1, thereby ensuring the service life of the respiratory therapy device.

[0081] Preferably, there are two transmitters and receivers 43 arranged at intervals along the vertical direction, so as to reduce the production cost of the respiratory therapy equipment while ensuring the range of liquid level detection.

[0082] This application does not specify the sealing connection method between the transparent component and the detection position 11. It can be integrally formed with the shell 1 through a two-color molding process, and the sealing connection with the detection position 11 can also be achieved by using sealant or sealing ring.

[0083] Preferably, the transmitter and receiver 43 is an infrared transmitter and receiver to reduce the production cost of the respiratory therapy equipment while ensuring the detection effect of the liquid level.

[0084] It is understood that in the above-described embodiments one and two, the detection position 11 is formed by a hole structure provided in the housing 1. The hole structure can be a round hole, a square hole, etc., or it can be a notch shape that penetrates the side of the housing 1.

[0085] Implementation Method 3: In this implementation method, refer to... Figures 13 to 14The sensing element 4 also includes a sensor 44 disposed on the circuit board 41 and a float 45 that can float in the humidifier 2. At least two sensors 44 are disposed in the vertical direction. When the float 45 is opposite to any sensor 44, the state of the sensor 44 changes, so as to detect the liquid level in the humidifier 2 by means of the state change of the sensor 44.

[0086] Since at least two sensors 44 are arranged vertically, one sensor 44 can correspond to the minimum liquid level setting of the humidifier 2, and the other sensor 44 can correspond to the maximum liquid level setting of the humidifier 2. This enables the detection of the minimum and maximum liquid levels of the humidifier 2, avoiding situations where there is too little or too much humidifying fluid inside the humidifier 2, thus ensuring the therapeutic effect on the patient. Since the state of the sensor 44 changes when the float 45 is relative to either sensor 44, the liquid level in the humidifier 2 can be detected by utilizing the state change of the sensor 44. This allows the user to be reminded whether to add or stop adding humidifying fluid based on the state change of the sensor 44, thereby improving the user experience.

[0087] This application does not specifically limit the structure of sensor 44; preferably, refer to... Figure 14 The sensor 44 is a reed switch, and the float 45 includes a float body and a magnetic component disposed on the float body. The magnetic component can apply a magnetic force to the reed switch to change the state of the reed switch.

[0088] Since the sensor 44 is a reed switch, the production cost of the respiratory therapy device is reduced, and the stability of the liquid level detection in the humidifier 2 is increased. Since the float 45 includes a float body and a magnetic component that can apply magnetic force to the reed switch, on the one hand, the float 45 can float up and down with the change of liquid level, and on the other hand, the float 45 can apply magnetic force to the corresponding reed switch to change the state of the reed switch.

[0089] Furthermore, the float has a ring structure to ensure that the distance between the magnetic component and the sensor 44 is kept within an optimal range while ensuring the humidification effect on the gas, so as to ensure the accuracy of liquid level detection.

[0090] In other embodiments, the sensor 44 may also be a magnetoresistive or other electrical components that can change state under the action of magnetic force.

[0091] Preferably, four sensors 44 are arranged at intervals along the vertical direction to provide users with multiple liquid level states so that users can add or stop adding humidifying liquid to the humidifier 2 in a timely manner.

[0092] It is understood that in this embodiment, the housing 1 has a sealing area opposite to the sensor 44, the sealing area forms the detection position 11, and the portion of the housing 1 corresponding to the sealing area forms the sealing element 3.

[0093] It should be noted that the "vertical direction" mentioned in the above three embodiments is not limited to the direction of the plumb bob; it can also be a direction at an angle to the direction of the plumb bob. This mainly depends on the mounting method of the circuit board 41. If the circuit board 41 is set along the direction of the plumb bob, then the vertical direction refers to the direction of the plumb bob; if the circuit board 41 is set at an angle to the direction of the plumb bob, then the vertical direction refers to the direction at an angle to the direction of the plumb bob.

[0094] In a preferred embodiment, refer to Figure 7 , Figure 11 and Figure 15 The housing 1 is provided with a limiting rib 12 extending circumferentially along the seal 3. The seal 3 is disposed within the limiting rib 12. On the one hand, it realizes the positioning of the seal 3 to increase the connection stability between the seal 3 and the housing 1. At the same time, the limiting rib 12 can also serve as a visual reminder when installing the seal 3, so as to facilitate the installation of the seal 3 in place. On the other hand, it can also increase the contact area between the seal 3 and the housing 1 to improve the sealing effect of the seal 3 on the detection position 11, further preventing liquid from entering the interior of the housing 1, thereby improving the service life of the respiratory therapy device.

[0095] In a preferred embodiment, refer to Figure 4 , Figure 5 , Figure 6 and Figure 7 The inner side of the housing 1 is provided with a positioning part 13, and the circuit board 41 is provided with a mating part 411 that can cooperate with the positioning part 13 to position the circuit board 41.

[0096] When installing the circuit board 41, first align the mating part 411 with the positioning part 13, and then apply a force to the circuit board 41 in the direction of the positioning part 13 so that the circuit board 41 moves toward the positioning part 13. Finally, the positioning part 13 and the mating part 411 are engaged to achieve the positioning of the circuit board 41. Then the circuit board 41 can be fixed, thereby achieving the effect of facilitating the fixing of the circuit board 41, thereby improving the assembly efficiency of the respiratory therapy equipment and thus improving the production efficiency of the respiratory therapy equipment.

[0097] This application does not specifically limit the structure of the positioning part 13 and the mating part 411. Preferably, the positioning part 13 is a rod-shaped structure located inside the housing 1, and the mating part 411 is a hole structure located on the circuit board 41, so as to achieve the positioning of the circuit board 41 by the insertion and engagement of the rod-shaped structure and the hole structure. In other embodiments, the positioning part 13 may also be a block-shaped structure located inside the housing 1, and the mating part 411 may be a notch located on the side of the circuit board 41 that can accommodate the block-shaped structure, so as to achieve the positioning of the circuit board 41 by the engagement of the block-shaped structure and the notch.

[0098] This application does not specify the method of fixing the circuit board 41. Preferably, a connecting post 14 is provided on the inner side of the housing 1, and the circuit board 41 is provided with a through hole corresponding to the connecting post 14. A screw 412 threaded to the connecting post 14 is inserted through the through hole, thereby fixing the circuit board 41 to the housing 1, increasing the connection stability between the circuit board 41 and the housing 1, and reducing the difficulty of fixing the circuit board 41, thereby improving the production efficiency of the respiratory therapy device. Furthermore, by providing the connecting post 14, the connection area between the screw 412 and the housing 1 is increased, thereby improving the fixing effect of the circuit board 41.

[0099] In other embodiments, the circuit board 41 can also be fixedly connected to the housing 1 by a snap-fit ​​structure or by adhesive.

[0100] In a preferred embodiment, refer to Figure 1 The respiratory therapy device also includes an electrical adapter 5 and other components located in the housing space. The electrical adapter 5 is located outside the housing 1 and is used to connect the humidifier 2 to other components in the housing space. The electrical adapter 5 can also electrically connect the components in the housing space to the heating pipes.

[0101] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0102] 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.

[0103] 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. A respiratory therapy device, characterized in that, The respiratory therapy device includes a housing and a humidifier. The housing has an internal receiving space, and the humidifier is located outside the housing. The respiratory therapy device also includes a liquid level detection component for detecting the liquid level inside the humidifier. The housing has a detection position located between the humidifier and the liquid level detection component. The liquid level detection component includes a seal and a sensor located at least partially within the receiving space. The sensor includes a circuit board located within the receiving space. The seal is capable of sealing the area where the detection position is located.

2. The respiratory therapy device according to claim 1, characterized in that, The sensing element also includes a sensing area disposed on the circuit board. At least two sensing areas are disposed in the vertical direction, and the capacitance value of the sensing area can change with the change of liquid level in the humidifier, so as to detect the liquid level in the humidifier by the change of capacitance value of the sensing area.

3. The respiratory therapy device according to claim 2, characterized in that, The sensing element also includes a conductive element capable of transmitting signals. The conductive element contacts the sensing area, and the detection position penetrates through it in the direction of the housing wall thickness. The conductive element extends into or out of the detection position from the inside of the housing.

4. The respiratory therapy device according to claim 3, characterized in that, The conductive element is a spring pin located in the sensing area, and the sealing element is sleeved on the outside of the spring pin and is interference-fitted with the spring pin.

5. A respiratory therapy device according to claim 3, characterized in that, The conductive element is a conductive column integrally formed into the sealing element.

6. A respiratory therapy device according to claim 3, characterized in that, The conductive element includes a sealing conductive portion disposed on the sealing element and an elastic conductive portion disposed on the sensing area. The elastic conductive portion is conductive. The sealing conductive portion has an opening facing the circuit board and the elastic conductive portion extends into the accommodating cavity.

7. A respiratory therapy device according to claim 6, characterized in that, The sealing and conductive part includes a first section and a second section with an outer diameter greater than that of the first section. The wall thickness of the second section is equal to that of the first section, and the second section is connected to the sealing element.

8. A respiratory therapy device according to claim 1, characterized in that, The sensing element also includes a transmitter and receiver disposed on the circuit board. At least two transmitters and receivers are disposed in the vertical direction. The transmitters and receivers are capable of transmitting signals to the humidifier and receiving signals transmitted by the humidifier. The detection position penetrates through the housing wall in the thickness direction. The sealing member is a transparent component that is sealed to the detection position so as to detect the liquid level of the humidifier by means of the change in signal reflectivity.

9. A respiratory therapy device according to claim 1, characterized in that, The sensing element also includes a sensor disposed on the circuit board and a float that can float in the humidifier. At least two sensors are disposed in the vertical direction. When the float is opposite to any of the sensors, the state of the sensor changes so as to detect the liquid level in the humidifier by means of the state change of the sensor.

10. A respiratory therapy device according to claim 9, characterized in that, The sensor is a reed switch, and the float includes a float body and a magnetic component disposed on the float body. The magnetic component can apply a magnetic force to the reed switch to change the state of the reed switch.

11. A respiratory therapy device according to any one of claims 1-10, characterized in that, The housing is provided with a limiting rib extending circumferentially along the seal, and the seal is disposed within the limiting rib.

12. A respiratory therapy device according to any one of claims 1-10, characterized in that, The inner side of the housing is provided with a positioning part, and the circuit board is provided with a mating part that can cooperate with the positioning part to position the circuit board.

13. A respiratory therapy device according to any one of claims 1-10, characterized in that, A connecting post is provided on the inner side of the housing, and a through hole is provided on the circuit board corresponding to the connecting post. A screw threaded to the connecting post passes through the through hole.

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