Speed measuring device for inhaler and inhaler set having the same

Abstract

The application discloses a speed measuring device for an inhaler and an inhaler set with the same. The inhaler is provided with an inhalation port. The speed measuring device comprises a fixed shell which is adapted to be mounted to the inhaler. The fixed shell is internally provided with a first chamber, an air passage and a communication passage. The air passage is provided with an air inlet and an air outlet at two ends. The air inlet is located on the outer peripheral wall of the fixed shell. The air outlet is adapted to be arranged opposite to the inhalation port and is in communication with the inhalation port. The inlet of the communication passage is arranged on the inner peripheral wall of the air passage and is in communication with the first chamber so as to guide air to the first chamber. The cross-sectional area of at least part of the communication passage gradually decreases in the direction towards the first chamber so as to define a reverse contraction port. A pressure sensor is arranged in the first chamber and is adapted to sense the air flow pressure. The speed measuring device designed according to the application has little influence on the inhaler resistance, can accurately detect the pressure of the inhaled air flow and accurately feedback the pressure and flow rate of the air flow.

Description

TECHNICAL FIELD

[0001] The present application relates to accessories of powder aerosol inhalers, in particular to a speed measuring device for an inhaler and an inhaler set having the same. BACKGROUND

[0002] Inhalation administration is the most effective administration method for diseases of the upper respiratory tract and lungs, and inhalation powder aerosols, aerosols and atomized solutions can be filled into relevant medical devices for administration by inhalation. The powder aerosol inhaler is one of the relevant medical devices.

[0003] In the related art, the powder aerosol inhaler generally has a use port for the user to contact with the mouth, and an airflow inlet in communication with the use port. The external airflow of the inhaler can enter the internal airflow of the inhaler through the airflow inlet, and carry the powder aerosol to the use port. When the user uses the powder aerosol inhaler, the user inhales through the use port of the inhaler, and the airflow entering the internal airflow of the inhaler carries the powder aerosol to the use port. The suction of the user's inhalation is closely related to the flow rate of the airflow entering the internal airflow of the inhaler, and the flow rate of the airflow directly affects the cut-off diameter and the total amount of the inhaled drug, and further affects the deposition site and the delivery efficiency of the drug. Therefore, the flow rate of the inhalation airflow is a very important data in the process of administering the powder aerosol by inhalation.

[0004] In order to detect the flow rate of the inhalation airflow, some existing technologies add a flow sensor near the airflow inlet. However, the added flow sensor increases the suction resistance at the airflow inlet, affects the drug delivery efficiency of the inhaler, and hinders the user from inhaling the drug. In some other technologies, a sound sensor is arranged on the inhaler to detect the sound size of the airflow inlet, and the gas flow rate is determined by the functional relationship between the sound size and the gas flow rate. However, the sound sensor is very susceptible to external noise interference, resulting in inaccurate flow rate data. SUMMARY

[0005] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a speed measuring device for an inhaler. The speed measuring device designed according to the present application has little effect on the suction resistance of the inhaler, can accurately detect the pressure of the inhalation airflow, and accurately feedback the pressure and flow rate of the airflow.

[0006] The present application also provides an inhaler set having the above-mentioned speed measuring device.

[0007] The speed measuring device according to the present application is used for an inhaler, the inhaler is provided with an inhalation port, and the speed measuring device comprises: a fixed housing which is adapted to be mounted to the inhaler, a first chamber, an air passage and a communication passage are arranged in the fixed housing, the air passage has an air inlet and an air outlet at two ends thereof, the air inlet is located on an outer peripheral wall of the fixed housing, the air outlet is adapted to be arranged opposite to and communicated with the inhalation port, an entrance of the communication passage is arranged on an inner peripheral wall of the air passage and is communicated with the first chamber to guide air to the first chamber, at least a part of the communication passage gradually decreases in cross-sectional area in a direction towards the first chamber to define a reverse taper; and a pressure sensor which is arranged in the first chamber and is adapted to sense air flow pressure.

[0008] The speed measuring device according to the present application can detect the pressure of the air flow without affecting the inhalation resistance of the inhaler by arranging the communication passage at the inhalation port of the inhaler to guide the air flow to the first chamber provided with the pressure sensor, and can convert the air flow pressure into the air flow speed by using the Bernoulli principle, and can increase the air pressure at the position of the pressure sensor and can form a cyclone at the reverse taper of the communication passage towards the first chamber to enable the pressure sensor to accurately detect the pressure of the air flow, thereby accurately feeding back the air flow speed data.

[0009] According to some embodiments of the present application, the reverse taper is located at an end of the communication passage towards the first chamber.

[0010] According to some embodiments of the present application, a part of the inner peripheral wall of the communication passage is formed as an inclined surface which extends obliquely towards the reverse taper, and the inclined surface is arranged opposite to the entrance in the flow direction of the air flow.

[0011] According to some embodiments of the present application, a geometric center of the air inlet is located on a side of a geometric center of the air outlet towards the first chamber.

[0012] According to some embodiments of the present application, in a direction from the air inlet to the air outlet, the air passage comprises a first part, a second part and a third part which are arranged in sequence and are communicated, the first part is provided with the air inlet, the third part is provided with the air outlet, and the flow area of the second part is greater than the flow areas of the first part and the third part respectively.

[0013] According to some embodiments of the present application, the entrance is located on an inner peripheral wall of the second part.

[0014] According to some embodiments of the present application, the speed measuring device further comprises a switch member movably arranged in the fixed housing and cooperating with the pressure sensor, the switch member being triggered to turn on or off the pressure sensor.

[0015] According to some embodiments of the present application, the fixed housing defines a ring-shaped sleeve space, and the inhaler is arranged in the sleeve space.

[0016] According to some embodiments of the present application, the fixed housing comprises two sub-housings fixedly cooperating in the circumferential direction of the sleeve space.

[0017] According to some embodiments of the present application, at least one of the sub-housings is provided with a positioning member adapted to positionally cooperate with the inhaler.

[0018] According to some embodiments of the present application, the two sub-housings are snap-fitted.

[0019] According to some embodiments of the present application, the speed measuring device further comprises a detection module electrically connected to the pressure sensor to receive a detection signal, the detection module being provided with a signal transmission module adapted to signal transmission with an external terminal.

[0020] The inhaler set according to another aspect of the present application is briefly described below.

[0021] The inhaler set according to the present application comprises an inhaler provided with an inhalation port, and a speed measuring device configured as any one of the speed measuring devices according to the above embodiments, the fixed housing being mounted to the inhaler, and the air outlet being arranged opposite to and in communication with the inhalation port. Since the inhaler set according to the present application is provided with the speed measuring device according to the above embodiments, the inhaler set can monitor the inhalation speed of the user during the drug taking process in real time, and can show the user the drug taking condition to assist the user in taking the drug.

[0022] According to some embodiments of the present application, at least part of the fixed housing is inserted into the inhalation port.

[0023] According to some embodiments of the present application, the speed measuring device is detachably mounted to the inhaler.

[0024] According to some embodiments of the present application, the minimum cross-sectional area of the air passage is S1, and the flow area of the inhalation port is S2, and S1≥0.9S2.

[0025] In summary, the speed measuring device according to the present application can detect the pressure of the inhalation airflow, accurately feedback the pressure and flow rate of the airflow, and increase the air pressure at the position of the air pressure sensor, make the speed measuring airflow more concentrated, and more accurately detect the pressure of the speed measuring airflow, by setting the communication channel at the inhalation port of the inhaler to guide the airflow to the first chamber provided with the pressure sensor, without affecting the inhalation resistance of the inhaler, and at least part of the communication channel towards the first chamber is configured as a reverse bell mouth.

[0026] Additional aspects and advantages of the present application will be in part apparent and in part pointed out below. BRIEF DESCRIPTION OF DRAWINGS

[0027] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings.

[0028] Figure 1 is a front view of an inhaler set according to an embodiment of the present application.

[0029] Figure 2 is a partial cross-sectional view of an inhaler set according to an embodiment of the present application.

[0030] Figure 3 is a side view of an inhaler set according to an embodiment of the present application.

[0031] Figure 4 is a cross-sectional view of an inhaler set according to an embodiment of the present application.

[0032] Figure 5 is Figure 4 is an enlarged view of circle A.

[0033] Figure 6 is a top view of an inhaler set according to an embodiment of the present application.

[0034] Figure 7 is a top view of a speed measuring device according to an embodiment of the present application.

[0035] Figure 8 is a pressure-flow rate curve diagram of an inhaler with a speed measuring device according to an embodiment of the present application.

[0036] REFERENCE NUMERALS:

[0037] inhaler set 1;

[0038] inhaler 10; inhalation port 10a; use port 10b;

[0039] speed measuring device 20; outer sleeve space 20a; charging port 21a;

[0040] First sub-housing 211; first part 2111a; second part 2112a; third part 2113a; communication passage 211b; inclined surface 211c; air inlet 211d; reverse notch 211f; clamping groove 2110;

[0041] Second sub-housing 212; visible window 212a; clamping protrusion 2120;

[0042] Pressure sensor 22; switch piece 23; fixed nozzle 24; air outlet 24a; control panel 25; air port 25a. DETAILED DESCRIPTION

[0043] Embodiments of the present application are described in detail below with reference to examples illustrated in the accompanying drawings, in which the same or similar components have the same or similar designations throughout the various figures and identical or similar components have the same or similar reference numerals. The embodiments described below are examples of the present application, and are merely intended to explain the present application, and should not be understood as limiting the present application.

[0044] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only intended to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0045] In addition, the terms "first", "second", etc. are used only for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0046] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or can communicate with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] In the present application, unless specifically stated and limited otherwise, a first feature is "on" or "under" a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature is "over", "above" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher in horizontal height than the second feature. The first feature is "under", "below" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the first feature is lower in horizontal height than the second feature.

[0048] Inhalation administration is the most effective administration for diseases of upper respiratory tract and lung, and inhalation powder mist, aerosol and atomized solution can be filled into relevant medical equipment for administration by inhalation. The powder mist inhaler is one of the relevant medical equipment.

[0049] In the related art, the powder mist inhaler generally has a use port for the user to contact with the mouth, and an airflow inlet in communication with the use port. The external airflow of the inhaler can enter the internal part of the inhaler through the airflow inlet, and carry the powder mist to flow to the use port. When the user uses the powder mist inhaler, the user inhales through the use port of the inhaler, and the airflow entering the internal part of the inhaler through the airflow inlet carries the powder mist to flow to the use port. The suction of the user is closely related to the flow rate of the airflow entering the inhaler through the airflow inlet. The flow rate of the airflow directly affects the cut-off diameter and the total amount of the inhaled medicine, and further affects the deposition site and the delivery efficiency of the medicine. Therefore, the flow rate of the airflow is a very important data in the process of administering the powder mist by inhalation.

[0050] In order to detect the flow rate of the airflow, some existing technologies add a flow sensor near the airflow inlet. However, the added flow sensor increases the suction resistance at the airflow inlet, affects the drug delivery efficiency of the inhaler, and hinders the user from inhaling the medicine. In some other technologies, a sound sensor is arranged on the inhaler to detect the sound size of the airflow inlet, and the gas flow rate is determined by the functional relationship between the sound size and the gas flow rate. However, the sound sensor is very easy to be disturbed by external noise, resulting in inaccurate flow rate data.

[0051] Reference will now be made to Figures 1-7 A speed measuring device 20 for the inhaler 10 according to an embodiment of the present application is described.

[0052] As Figures 1-7As shown, the speed measuring device 20 according to the present application is used in the inhaler 10, the inhaler 10 is provided with an inhalation port 10a, the speed measuring device 20 comprises a fixed housing and a pressure sensor 22. The fixed housing is adapted to be mounted to the inhaler 10, the fixed housing is provided with a first chamber, an air passage and a communication passage 211b, the air passage has an air inlet 211d and an air outlet 24a at two ends, the air inlet 211d is located on the outer peripheral wall of the fixed housing, the air outlet 24a is adapted to be arranged opposite to the inhalation port 10a and in communication, the inlet of the communication passage 211b is arranged on the inner peripheral wall of the air passage and is in communication with the first chamber to guide the air to the first chamber, at least part of the communication passage 211b gradually decreases in cross-sectional area in the direction towards the first chamber to define a reverse neck 211f; the pressure sensor 22 is arranged in the first chamber and is adapted to sense the airflow pressure.

[0053] Specifically, the inhaler 10 is internally formed with a powder aerosol storage chamber, the inhaler 10 is provided with a use port 10b in communication with the powder aerosol storage chamber and an airflow inlet in communication with the use port 10b, a user can inhale through the use port 10b, at this time, the external airflow enters the internal part of the inhaler 10 through the airflow inlet and carries the powder aerosol to flow to the use port 10b. The inhaler 10 generally has a plurality of airflow inlets, a part of the airflow inlets are in communication with the internal part of the inhaler 10 so that the external airflow enters the internal part of the inhaler 10 to contact and carry the powder aerosol to flow, the part of the airflow inlets are generally arranged at the bottom of the inhaler 10 and have a starting flow rate, the part of the airflow inlets are opened only when the starting flow rate is reached, in order to make it easier to open the part of the airflow inlets, i.e. to reduce the suction resistance, another part of the airflow inlets are directly in communication with the use port 10b, the another part of the airflow inlets are configured as the inhalation port 10a, the user inhales through the use port 10b, the part of the airflow inlets and the inhalation port 10a can both enter the external airflow. In order to accurately detect the flow rate of the airflow inlet, the speed measuring device 20 is arranged at the airflow inlet, at the same time, in order to avoid increasing the suction resistance, i.e. to avoid increasing the difficulty of the user taking medicine, the speed measuring device 20 is arranged at the inhalation port 10a in the airflow inlet, so as to accurately detect the flow rate of the inhalation airflow without affecting the suction resistance of the inhaler 10.

[0054] The speed measuring device 20 can monitor the inhalation speed of the user during the process of taking medicine in real time, if the inhalation speed of the user does not reach the starting flow rate, the speed measuring device 20 can prompt the user, which plays a role of guiding the user to correctly use the inhaler 10.

[0055] More specifically, the speed measuring device 20 comprises a fixed housing which can be mounted to the inhaler 10, and the fixed housing has a gas passage which communicates with the inhalation port 10a of the inhaler 10, and the gas outlet 24a of the gas passage is opposite to the inhalation port 10a, so that the external airflow of the inhaler 10 can enter the gas passage through the gas inlet 211d and flow along the gas passage to the inhalation port 10a through the gas outlet 24a. In order to accurately detect the airflow speed, a first chamber is provided in the fixed housing to arrange the pressure sensor 22, and the communication passage 211b communicates the gas passage with the first chamber to guide the airflow in the gas passage to the first chamber for the pressure sensor 22 to sense. It can be understood that according to Bernoulli's principle, the relationship between the airflow speed and the airflow pressure in the ideal state satisfies: p + pg h + (1 / 2) * p v2 = C, wherein p is the pressure of a point in the airflow fluid, v is the speed of the airflow fluid at the point, p is the density of the airflow fluid, g is the acceleration of gravity, h is the height of the point, and C is a constant. The pressure of the airflow can be detected by the pressure sensor 22, and the airflow pressure can be converted into the corresponding airflow speed by Bernoulli's formula, so as to realize the detection of the speed of the inhalation airflow.

[0056] The airflow entering the gas passage through the gas inlet 211d is divided into two parts after flowing through the inlet, one part of the airflow continues to flow along the gas passage to the inhalation port 10a and is inhaled by the user, and the one part of the airflow is the inhalation airflow; and the other part of the airflow enters the communication passage 211b through the inlet and flows along the communication passage 211b to the first chamber, so that the pressure sensor 22 senses the airflow pressure, and the other part of the airflow is the speed measuring airflow. Since the flow path of the speed measuring airflow is long, the speed of the speed measuring airflow in the flow direction will be lost to a certain extent, and the speed and pressure of the speed measuring airflow will gradually decrease. In order to enable the pressure sensor 22 to accurately detect the pressure of the airflow, at least part of the cross-sectional area of the communication passage 211b is gradually reduced in the direction towards the first chamber to define the reverse taper 211f, and the reverse taper 211f can be opposite to the pressure sensor 22 arranged in the first chamber. The reverse taper 211f is beneficial to increase the air pressure at the position of the pressure sensor, and is also beneficial to form a regular shape of the airflow. The speed measuring airflow can form a cyclone at the reverse taper 211f, and the airflow pressure at the center of the cyclone is the largest to reduce the loss of the speed measuring airflow as much as possible, so that the air pressure of the speed measuring airflow is approximately equal to the air pressure of the inhalation airflow. At the same time, the reverse taper 211f also has the effect of straightening the airflow, and when the airflow speed has a gradient change, the pressure detected by the pressure sensor 22 opposite to the reverse taper 211f also has a gradient change, which is more beneficial to collect the air pressure value satisfying the Bernoulli equation with the airflow speed.

[0057] The speed measuring device 20 according to the present application can detect the pressure of the inhalation airflow without affecting the resistance of the inhaler 10, and convert the pressure of the airflow into the flow rate of the airflow by using Bernoulli's principle, by providing the communication passage 211b at the inhalation port 10a of the inhaler 10 to guide the airflow to the first chamber provided with the pressure sensor 22, and by configuring at least part of the communication passage 211b towards the first chamber as the inverted bell mouth 211f to increase the air pressure at the position of the pressure sensor and to form a cyclone at the inverted bell mouth 211f to enable the pressure sensor 22 to accurately detect the pressure of the airflow and accurately feedback the flow rate data of the airflow.

[0058] The resistance of the inhaler 10 before and after the speed measuring device 20 is measured, and the results are shown in Table 1, which is the flow rate of the airflow under the air pressure of 4 Kpa. The final test curve is shown in Figure 8 , the ordinate is the flow rate of the airflow at the inhalation port 10a, and the abscissa is the air pressure value detected by the pressure sensor 22. The measured flow rate value is consistent with the fitted value, and it can be seen that the speed measuring device 20 almost does not affect the resistance of the inhalation port 10a of the inhaler 10.

[0059]

[0060] Table 1

[0061] According to some embodiments of the present application, as shown in Figure 2 , Figure 5 , the inverted bell mouth 211f is located at the end of the communication passage 211b towards the first chamber. Specifically, the cross-sectional area of the end of the communication passage 211b towards the first chamber gradually decreases to define the inverted bell mouth 211f, so that the inverted bell mouth 211f can be directly opposite to the pressure sensor 22 provided in the first chamber to increase the air pressure at the position of the pressure sensor, which is conducive to collecting the air pressure value that satisfies the Bernoulli equation with the flow rate of the airflow.

[0062] According to some embodiments of the present application, as shown in Figure 5 , a part of the inner wall of the communication passage 211b is formed as an inclined surface 211c extending towards the inverted bell mouth 211f. In the flow direction of the airflow, the inclined surface 211c is directly opposite to the inlet, and the inclined surface 211c is arranged between the inlet and the inverted bell mouth 211f to guide the airflow to flow towards the inverted bell mouth 211f. The speed measuring airflow entering the communication passage 211b through the inlet flows to the inverted bell mouth 211f under the action of the inclined surface 211c, which can reduce the loss of the speed measuring airflow as much as possible, so that the air pressure of the speed measuring airflow is approximately equal to the air pressure of the inhalation airflow.

[0063] According to some embodiments of the present application, the geometric center of the inlet 211d is located on the side of the geometric center of the outlet 24a facing the first chamber. It can be understood that, in order to ensure that the speed measuring device 20 does not affect the inhalation resistance of the inhaler 10, it is necessary to ensure that the speed measuring device 20 meets the design that the inhalation airflow flows out of the suction port 10a and the speed measuring airflow can enter the communication passage 211b, that is, to ensure that the design of the communication passage 211b does not affect the suction resistance of the suction port 10a. Since the outlet 24a of the airflow passage directly faces the suction port 10a of the inhaler 10, the projections of the outlet 24a of the airflow passage and the inlet 211d in the radial direction of the inhaler 10 should not completely coincide, wherein the shapes of the inlet 211d and the outlet 24a are not limited, as long as the geometric center of the inlet 211d is located on the side of the geometric center of the outlet 24a facing the first chamber, so that the speed measuring device 20 meets the design that the inhalation airflow can flow out of the suction port 10a and the speed measuring airflow can enter the communication passage 211b, and the communication passage 211b almost does not affect the suction resistance of the suction port 10a, thereby avoiding affecting the user's use of the inhaler 10.

[0064] According to some embodiments of the present application, in the direction from the inlet 211d to the outlet 24a, the airflow passage includes sequentially arranged and communicated first, second and third portions 2111a, 2112a and 2113a, the first portion 2111a is provided with the inlet 211d, the third portion 2113a is provided with the outlet 24a, and the flow area of the second portion 2112a is greater than the flow areas of the first and third portions 2111a and 2113a, respectively. Specifically, in some embodiments, as shown in Figure 2 、 Figure 5 The speed measuring device 20 further includes a fixed nozzle 24, which is arranged inside the fixed shell and at least part of the airflow passage is formed inside the fixed nozzle 24, and the fixed nozzle 24 is formed with the outlet 24a. The at least part of the airflow passage formed inside the fixed nozzle 24 is the third portion 2113a, the at least part of the airflow passage between the fixed nozzle 24 and the inlet 211d is the second portion 2112a, the inlet is located on the inner circumferential wall of the second portion 2112a, and the speed measuring airflow enters the communication passage 211b through the inlet. After the airflow enters the first portion 2111a through the inlet 211d, part of the airflow impacts the surface of the fixed nozzle 24 facing the inlet 211d and generates a cyclone in the second portion 2112a, which can accelerate the dissipation of the turbine to eliminate pressure pulsation, thereby reducing the airflow resistance and minimizing the loss of the speed measuring airflow, so that the pressure sensor 22 can accurately detect the pressure of the airflow and accurately feedback the airflow speed data.

[0065] According to some embodiments of the present application, as shown in Figures 1-7As shown, the speed measuring device 20 further comprises a switch member 23. The switch member 23 is movably arranged in the fixed housing and cooperates with the pressure sensor 22. When the switch member 23 is triggered, the switch member 23 turns on or off the pressure sensor 22. Specifically, the speed measuring device 20 is internally provided with a control panel 25. The pressure sensor 22 is electrically connected to the control panel 25. After the switch member 23 is triggered, the control panel 25 circuit can be controlled to be turned on or turned off, so as to turn on or turn off the pressure sensor 22. The fixed housing is further provided with a charging port 21a for charging the control panel 25.

[0066] In some embodiments, as shown in Figure 5 As shown, one side of the control panel 25 is provided with the switch member 23, and the other side of the control panel 25 is provided with the pressure sensor 22. The control panel 25 is provided with a gas port 25a suitable for the speed measuring airflow to pass through. The gas port 25a is in communication with the first chamber and is opposite to at least part of the pressure sensor 22. The speed measuring airflow flows from the reverse contraction port 211f to the gas port 25a and enters the first chamber. The gas port 25a is arranged to make the speed measuring airflow more concentrated, so that the pressure of the speed measuring airflow can be more accurately detected, and the air pressure value meeting the Bernoulli equation can be more beneficially collected.

[0067] According to some embodiments of the present application, as shown in Figures 6-7 As shown, the inhaler 10 is configured in a cylindrical shape. The fixed housing defines an annular sleeve space 20a. The inhaler 10 is arranged in the sleeve space 20a and fixedly cooperates with the fixed housing. The inhalation port 10a of the inhaler 10 needs to be opposite to the air outlet port 24a of the fixed housing, so that the airflow entering through the air inlet port 211d can enter the inhalation port 10a through the air passage.

[0068] According to some embodiments of the present application, as shown in Figures 1-7 As shown, in the circumferential direction of the sleeve space 20a, the fixed housing comprises two sub-housings fixedly cooperating with each other. The two sub-housings are respectively a first sub-housing 211 and a second sub-housing 212. The air passage, the communication passage 211b and the first chamber are formed in the first sub-housing 211. The inhaler 10 is provided with a dose display port. Whenever a dose of powder mist in the inhaler 10 is used, the value of the dose display port will change. The second sub-housing 212 is provided with a visible window 212a to expose the dose display port, so that the user can know the remaining amount of the powder mist.

[0069] According to some embodiments of the present application, at least one of the sub-housings is provided with a positioning member adapted to be positioned in cooperation with the inhaler 10 to avoid mispositioning of the flow rate measuring device 20 during use, thereby avoiding deviation of the inhalation port 10a of the inhaler 10 from the air outlet 24a of the fixed housing, ensuring that the inhalation port 10a of the inhaler 10 is directly opposite the air outlet 24a of the fixed housing, so that the airflow entering through the air inlet 211d can enter the inhalation port 10a through the airflow channel, ensuring that the pressure sensor 22 detects the air pressure of the airflow at the inhalation port 10a, thereby ensuring the accuracy of the airflow rate data.

[0070] According to some embodiments of the present application, as shown in Figure 3 、 Figure 6 、 Figure 7 One of the first sub-housing 211 and the second sub-housing 212 is provided with a clamping protrusion 2120, and the other is provided with a clamping groove 2110, so that the two sub-housings can be snap-fitted, the cooperation between the two sub-housings is simple and reliable, and when the user uses the inhaler 10, the flow rate measuring device 20 can be installed on the outer periphery of the inhaler 10, and the snap-fitting of the two sub-housings of the flow rate measuring device 20 is convenient for the user to operate.

[0071] According to some embodiments of the present application, the flow rate measuring device 20 further comprises a detection module electrically connected to the pressure sensor 22 to receive the detection signal, and the detection module has a signal transmission module adapted to be in signal transmission with an external terminal. Specifically, in some embodiments, the detection module detects the signal of the pressure sensor 22 and can transmit the signal to a mobile phone through mobile phone Bluetooth, and the data is transmitted to the mobile phone in real time through the Bluetooth wireless transmission function, so as to monitor and analyze the inhalation flow rate of the user in real time, and can simultaneously achieve the functions of guiding the user to correctly use the inhalation powder aerosol device, judging the pulmonary delivery efficiency of the inhalation powder aerosol, and real-time monitoring the pulmonary function of the user during the use of the drug, helping the user to manage the pulmonary function data and evaluate the lung disease warning, etc.

[0072] The flow rate measuring device 20 can monitor the inhalation flow rate of the user in real time, judge whether the user can use the inhaler 10, and the signal detected by the pressure sensor 22 is transmitted to the mobile phone through the detection module, which objectively reflects the inhalation flow rate of the user, and can assist the user to judge whether the inhaler 10 can be used. At the same time, the user can observe in real time whether the inhalation flow rate is within the correct inhalation range, and can make corresponding adjustments to increase or decrease the flow rate, so as to use the powder aerosol inhaler 10 more normatively, so that the flow rate measuring device 20 can judge whether the user can use the inhaler 10, and can be used for training during the use of the powder aerosol inhaler 10.

[0073] The subjects use the inhaler 10 of the flow rate measuring device 20 to inhale three times, and the peak inhalation flow rate obtained is recorded by the client, and the results are shown in Table 2. The peak inhalation flow rates of subjects 1, 2, and 3 are all above 30 L / min, so they can use the effective use of the powder aerosol inhaler 10. The peak inhalation flow rates of subjects 4 and 5 are not above 30 L / min, so they may not be suitable for the powder aerosol inhaler 10, and then the inhalation solution with lower inhalation flow rate requirements can be replaced. In addition, the subjects can adjust the airflow and deepen the memory by observing their own inhalation flow rate each time, so as to train themselves to use the powder aerosol inhaler 10 correctly.

[0074] Number First peak inhalation flow rate Second peak inhalation flow rate Third peak inhalation flow rate Subject 1 73.5 75.6 74.2 Subject 2 90.9 90.4 87.7 Subject 3 53.7 53.5 57.5 Subject 4 28.2 27.5 27.1 Subject 5 25.4 24.9 25.6

[0075] Table 2

[0076] The inhaler set 1 according to the present application is briefly described below.

[0077] As shown in Figures 1-6 , the inhaler set 1 according to the present application comprises an inhaler 10 and a flow rate measuring device 20. The inhaler 10 is provided with an inhalation port 10a, and the flow rate measuring device 20 is configured as the flow rate measuring device 20 of any one of the above embodiments. The fixed housing is mounted to the inhaler 10, and the fixed housing has an air passage that communicates with the inhalation port 10a of the inhaler 10. The air outlet 24a of the air passage is opposite to the inhalation port 10a, so that the airflow outside the inhaler 10 can enter the air passage through the air inlet 211d, and then flow to the inhalation port 10a through the air outlet 24a along the air passage. Since the inhaler set 1 according to the present application is provided with the flow rate measuring device 20 of the above embodiments, the inhalation speed of the user during the medication process can be monitored in real time, and the user can be prompted about the medication situation, thereby assisting the user in taking medication.

[0078] According to some embodiments of the present application, as shown in Figure 5 , at least part of the fixed housing is inserted into the inhalation port 10a. In some embodiments, the flow rate measuring device 20 further comprises a fixed nozzle 24, and at least part of the fixed nozzle 24 is inserted into the inhalation port 10a, so that the air outlet 24a of the fixed nozzle 24 is opposite to the inhalation port 10a. In some embodiments, the fixed nozzle 24 can be made of silica gel to seal the gap between the inhalation port 10a and the air outlet 24a, so as to ensure that the flow rate measuring device 20 does not leak after being matched with the inhaler 10.

[0079] According to some embodiments of the present application, the flow rate measuring device 20 is detachably mounted to the inhaler 10. It can be understood that, for the convenience of storage, the inhaler 10 generally has an outer shell. After the inhaler 10 is pulled out of the outer shell, the flow rate measuring device 20 can be mounted to the inhaler 10 to realize the detection of the airflow rate during the use of the inhaler 10. After the use of the inhaler 10 is completed, the flow rate measuring device 20 can be detached, and the inhaler 10 can be put back into the outer shell.

[0080] According to some embodiments of the present application, to avoid affecting the suction resistance of the suction port 10a, the minimum cross-sectional area S1 of the airflow channel cannot be smaller than the cross-sectional area S2 of the suction port 10a in theory, that is, S1≥S2 must be ensured, and due to the limitations of the speed measuring device 20 and the structure or product shape of the inhaler 10, the minimum cross-sectional area S1 of the airflow channel and the cross-sectional area S2 of the suction port 10a can satisfy S1≥0.9S2.

[0081] In summary, according to the speed measuring device 20 of the present application, by setting the communication channel 211b at the suction port 10a of the inhaler 10 to guide the airflow to the first chamber provided with the pressure sensor 22, the pressure of the inhalation airflow can be detected without affecting the suction resistance of the inhaler 10, the pressure and flow rate of the airflow can be accurately fed back, and at least part of the communication channel 211b towards the first chamber is configured as an inverted mouth 211f, which can increase the air pressure at the position of the air pressure sensor, make the speed measuring airflow more concentrated, more accurately detect the pressure of the speed measuring airflow, and more facilitate the collection of the air pressure value meeting the Bernoulli equation of the airflow flow rate, thereby accurately feeding back the airflow flow rate data.

[0082] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present specification.

[0083] Although the embodiments of the present application have been shown and described above, changes, modifications, replacements and variations of the above embodiments can be made.

Claims

1. A speed measuring device for an inhaler, the inhaler (10) being provided with a suction port (10a), characterized in that, The speed measuring device (20) comprises: a fixed housing adapted to be mounted to the inhaler (10), a first chamber, an air passage and a communication passage (211b) are arranged in the fixed housing, the air passage has an air inlet (211d) and an air outlet (24a) at two ends, the air inlet (211d) is located on the outer peripheral wall of the fixed housing, the air outlet (24a) is adapted to be arranged opposite to and communicated with the suction port (10a), the inlet of the communication passage (211b) is arranged on the inner peripheral wall of the air passage and communicated with the first chamber to guide air to the first chamber, at least part of the communication passage (211b) gradually reduces in cross-sectional area in the direction towards the first chamber to define a reverse neck (211f); a pressure sensor (22) arranged in the first chamber and adapted to sense airflow pressure; the geometric center of the air inlet (211d) is located on the side of the geometric center of the air outlet (24a) towards the first chamber; in the direction from the air inlet (211d) to the air outlet (24a), the air passage comprises a first part (2111a), a second part (2112a) and a third part (2113a) arranged in sequence and communicated, the first part (2111a) is provided with the air inlet (211d), the third part (2113a) is provided with the air outlet (24a), and the flow area of the second part (2112a) is greater than that of the first part (2111a) and the third part (2113a) respectively.

2. A speed measuring device for an inhaler according to claim 1, characterised in that, The reverse neck (211f) is located at the end of the communication passage (211b) towards the first chamber.

3. A speed measuring device for an inhaler according to claim 2, characterised in that, A part of the inner peripheral wall of the communication passage (211b) is formed as an inclined surface (211c) extending obliquely towards the reverse neck (211f), and the inclined surface (211c) is arranged opposite to the inlet in the flow direction of the airflow.

4. A speed measuring device for an inhaler according to claim 1, characterised in that, The inlet is located on the inner peripheral wall of the second part (2112a).

5. A speed measuring device for an inhaler according to claim 1, characterised in that, Further comprising: a switch piece (23) movably arranged in the fixed housing and matched with the pressure sensor (22), when the switch piece (23) is triggered, the switch piece (23) turns on or off the pressure sensor (22).

6. A speed measuring device for an inhaler according to any one of claims 1 to 5, wherein, The fixed housing defines an annular sleeve space (20a), and the inhaler (10) is arranged in the sleeve space (20a).

7. A speed measuring device for an inhaler according to claim 6, characterised in that, In the circumferential direction of the sleeve space (20a), the fixed housing comprises two sub-housings fixedly matched.

8. A speed measuring device for an inhaler according to claim 7, characterised in that, At least one of the sub-housings is provided with a positioning piece adapted to be positioned and matched with the inhaler (10).

9. A speed measuring device for an inhaler according to claim 7, characterised in that, The two sub-housings are snap-fitted.

10. A speed measuring device for an inhaler according to claim 1, characterised in that, Further comprising: a detection module electrically connected with the pressure sensor (22) to receive a detection signal, the detection module has a signal transmission module adapted to be signal-transmitted with an external terminal.

11. An inhaler kit, characterised in that, Comprising: An inhaler (10) is provided with an inhalation port (10a); A speed measuring device (20) is configured according to any one of claims 1-10, the fixed housing is mounted to the inhaler (10), and the air outlet (24a) is arranged opposite and communicated with the inhalation port (10a).

12. The inhaler kit of claim 11, wherein, At least part of the fixed housing is inserted into the inhalation port (10a).

13. The inhaler kit of claim 11, wherein, The speed measuring device (20) is detachably mounted to the inhaler (10).

14. The inhaler kit of claim 11, wherein, The minimum cross-sectional area of the air passage is S1, and the flow area of the inhalation port (10a) is S2, S1≥0.9S2.

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