WO2018201751A1

WO2018201751A1 - Air flow sensor and atomizer

Info

Publication number: WO2018201751A1
Application number: PCT/CN2018/071915
Authority: WO
Inventors: 徐传毅
Original assignee: 纳智源科技（唐山）有限责任公司
Priority date: 2017-05-05
Filing date: 2018-01-09
Publication date: 2018-11-08
Also published as: CN108721740A; CN108721740B

Abstract

Provided is an air flow sensor (100) and an atomizer, comprising: a hollow housing (110) and at least two sensing units (120) disposed inside the hollow housing (110), wherein each sensing unit (120) comprises a first friction layer (121) and a second friction layer (122); The first friction layer (121) is fixed on an inner wall of the hollow housing (110), and the second friction layer (122) is disposed opposite to the first friction layer (121); An air flow passage is formed inside the hollow housing (110), and an air flow inside the air flow passage acts on the first friction layer (121) and/or the second friction layer (122), so that the first friction layer (121) and the second friction layer (122) rub against each other; The at least two sensing units (120) form a sealed space, and the sealed space is not in communication with the airflow passage. The airflow sensor (100) and the atomizer solve the problem that the accuracy of the airflow sensor in the prior art is easily affected by the moisture factor, the component damage cannot be promptly reminded, and the production cost is high.

Description

Air flow sensor and atomizer

Cross-reference to related applications

The present application claims priority to Chinese Patent Application No. JP-A No. No. No. No. No. No. No. No. No. No. No. No. No. No. No.

Technical field

The present invention relates to the field of sensing technologies, and in particular, to an air flow sensor and an atomizer.

Background technique

At present, the global climate is getting warmer and the environmental pollution is increasing. Coupled with the sudden warming of the climate during the seasonal transition period, the number of patients with global respiratory diseases continues to increase, seriously affecting people's normal life. In this case, in order to adapt to various complex treatment conditions and to meet the high quality requirements of modern people for life, it is common to use a nebulizer that atomizes the water-soluble drug into tiny mist particles to allow the patient to inhale the atomized solution to alleviate Ill. At present, the types and functions of the atomizers in the prior art are also various, and generally include an ultrasonic atomizer, a compression atomizer, and a mesh atomizer.

However, the inventors have found in the process of implementing the present invention that the existing atomizer and the air flow sensor used therein have the following problems: First, the air flow sensor of the existing atomizer has no moisture-proof structure, thereby causing the atomizer to When the airflow sensor is affected by external factors such as moisture, the sensitivity and accuracy are generally reduced and it is not working properly. Second, the airflow sensor in the existing atomizer generally only has one sensing unit for the electrical signal. Output, once the sensor unit fails, the patient will not be able to complete the entire atomization process normally, and the instrument will be wasted due to the replacement of the instrument in the middle. Therefore, the existing atomizer has potential safety hazard; The structure and manufacturing process of the air flow sensor and the air flow sensor thereof are complicated and costly, which brings inconvenience to industrial production and user use.

It can be seen that the prior art lacks a gas flow sensor and atomizer that is safe, safe, sensitive and accurate, and low in cost.

Summary of the invention

SUMMARY OF THE INVENTION An object of the present invention is to provide an air flow sensor and an atomizer capable of solving the above problems in view of the deficiencies of the prior art.

According to an aspect of the invention, there is provided an air flow sensor comprising: a hollow housing, at least two sensing units disposed inside the hollow housing, wherein each sensing unit includes a first friction layer And a second friction layer; wherein the first friction layer is fixed on an inner wall of the hollow casing, the second friction layer is disposed opposite to the first friction layer; and the hollow casing Forming an air flow passage internally, the air flow inside the air flow passage acts on the first friction layer and/or the second friction layer to rub the first friction layer and the second friction layer with each other; wherein the at least two The sensing units form a closed space that is not in communication with the airflow passage.

According to another aspect of the present invention, there is provided an atomizer comprising: a liquid storage member, a nozzle airflow monitoring member, and an atomizer body, and the inside of the nozzle airflow monitoring member is provided with an air flow sensor as described above; a liquid storage member connected to the atomizer body for storing the liquid medicine to be atomized and sprayed; the nozzle air flow monitoring member connected to the liquid storage member for sensing by the air flow sensor The airflow is converted into a gas flow pressure electrical signal, and the liquid medicine atomized by the atomizer body is sprayed into the nose and mouth of the user; the atomizer body is electrically connected with the nozzle airflow monitoring component, The liquid medicine stored in the liquid storage member is atomized and sprayed, and the air flow pressure electric signal output from the air flow sensor in the nozzle airflow monitoring unit is processed.

It can be seen that in the air flow sensor and the atomizer provided by the present invention, the air flow sensor is realized by the principle of friction generation. The airflow sensor and the atomizer in the invention not only have a moisture-proof structure, but also ensure that the sensitivity and accuracy of each sensing unit in the airflow sensor are not affected by external factors such as moisture, so that the airflow sensor has a high working time. Accuracy, and by setting at least two sensing units, the safety factor of the atomizer can be improved; at the same time, the airflow sensor and the atomizer provided by the invention also simplify the manufacturing process, reduce the production cost, and provide industrial production. And the user has brought a lot of convenience.

DRAWINGS

1a is a schematic perspective structural view of an air flow sensor according to Embodiment 1 of the present invention;

1b is a schematic cross-sectional structural view of an air flow sensor according to Embodiment 1 of the present invention;

2a is a development view of the inner wall of the hollow casing when the two sensing units are disposed on the inner wall of the hollow casing according to the present invention;

2b is a development view of the inner wall of the hollow casing when the four sensing units are disposed on the inner wall of the hollow casing according to the present invention;

Figure 2c is a plan view showing the inner wall of the hollow casing when the eight sensing units are disposed on the inner wall of the hollow casing of the present invention;

3 is a schematic cross-sectional structural view of an air flow sensor according to Embodiment 2 of the present invention;

4 is a schematic perspective structural view of an air flow sensor according to Embodiment 3 of the present invention;

Figure 5 is a schematic view showing a modification of the air flow sensor of the first embodiment of the present invention;

Figure 6a shows a solution for the arrangement of the support members in the present invention;

Figure 6b shows another solution for the arrangement of the support members in the present invention;

FIG. 7 is a schematic view showing another modification of the air flow sensor according to Embodiment 1 of the present invention; FIG.

8 is a schematic view showing another modification of the air flow sensor according to Embodiment 2 of the present invention;

9a is a block diagram showing the functional structure of an atomizer according to another embodiment of the present invention;

9b is a schematic structural view of an atomizer according to another embodiment of the present invention;

9c is a schematic structural view of a main body of a compressed air atomizer according to another embodiment of the present invention;

FIG. 9 is a functional block diagram of a signal pre-processing module according to another embodiment of the present invention; FIG.

FIG. 9e is a schematic diagram showing the functional structure of another atomizer according to another embodiment of the present invention.

detailed description

The present invention will be described in detail by the following detailed description of the preferred embodiments of the invention, and the invention is not limited thereto.

The present invention provides an air flow sensor comprising: a hollow housing, at least two sensing units disposed inside the hollow housing, wherein each sensing unit includes a first friction layer and a second friction a layer; wherein the first friction layer is fixed on the inner wall of the hollow casing, and the second friction layer is disposed opposite to the first friction layer; and an air flow passage is formed inside the hollow casing, and the airflow inside the airflow passage acts on the first a friction layer and/or a second friction layer to rub the first friction layer and the second friction layer with each other; wherein at least two sensing units form a sealed space, and the sealed space is not in communication with the air flow passage. Wherein, the airflow inside the airflow passage can act on at least one of the first friction layer and the second friction layer, thereby causing the two friction layers to rub against each other. Here, it is to be noted that the sealed space may be a sealed space formed independently of each of the sensing units, or may be a sealed space formed by a plurality of sensing units in the air flow sensor as a whole. For example, the sealed space formed by the at least two sensing units may be a closed sub-cavity formed by a second friction layer in each sensing unit and an inner wall of the hollow casing, or may be disposed at A communication-type closed cavity formed between the communication sealing layer inside the hollow casing and the inner wall of the hollow casing. In summary, the present invention does not limit the specific form and formation manner of the above-mentioned sealed space.

It should be noted that each of the at least two sensing units in the present invention operates simultaneously. Of course, in the case where some of the sensing units are unable to work due to a malfunction, the remaining part of the sensing unit that has not failed is still working at the same time. In short, by working simultaneously on each sensing unit, on the one hand, the accuracy of the sensing result of the final output can be improved, and on the other hand, the output state of each sensing unit can be monitored to determine whether the working state of the entire airflow sensor is normal.

It can be seen that the airflow sensor of the invention not only has a moisture-proof structure, but also ensures that the sensitivity and accuracy of the sensing unit in the airflow sensor are not affected by external factors such as moisture, so that the airflow sensor has high accuracy during operation. And the accuracy and safety of the entire sensor can be improved by providing at least two sensing units. At the same time, the air flow sensor provided by the invention simplifies the manufacturing process and reduces the production cost, and is used for both industrial production and user use. There are many conveniences.

In order to facilitate the understanding of the present invention, the specific structure of the airflow sensor provided by the present invention will be described in detail through three specific embodiments. Among them, the basic structure of the air flow sensor in the following three embodiments is similar, but the inner sensing unit has a different sealing form.

Embodiment 1

1a and 1b are schematic structural views of an airflow sensor 100 according to Embodiment 1 of the present invention. 1a is a schematic perspective view of a gas flow sensor 100 according to a first embodiment of the present invention; FIG. 1b is a cross-sectional structural view of an air flow sensor 100 according to a first embodiment of the present invention. As shown in FIG. 1a and FIG. 1b, in the present embodiment, the airflow sensor 100 includes a hollow casing 110 and at least two sensing units 120 disposed inside the hollow casing 110. Each of the sensing units 120 includes a first friction layer 121 and a second friction layer 122. The first friction layer 121 is fixedly disposed on the inner wall of the hollow casing 110, and the second friction layer 122 is opposite to the first friction layer 121. And a portion where the sensing unit is not disposed inside the hollow casing 110 forms an air flow passage, and an air flow inside the air flow passage acts on the first friction layer 121 and/or the second friction layer 122 to make the first friction layer 121 The second friction layer 122 rubs against each other. The at least two sensing units 120 form a sealed space, and the sealed space does not communicate with the air flow passage. The first friction layer may be fixed in various manners, for example, may be attached to the inner wall, and may be completely attached or partially attached to the inner wall. The friction effect can be further improved by adopting a partial fitting manner. Specifically, when partially fitting, at least one of the following portions of the first friction layer may be attached to the inner wall: at least one of the two ends End, and middle. The first friction layer 121 further includes a first electrode 1211, the second friction layer 122 further includes a second electrode 1221, and the first electrode 1211 is further disposed with a first polymer on the side surface of the second friction layer 122. The second insulating layer 1212, and/or the second electrode 1221 is further disposed on the side surface of the first friction layer 121 with a second polymer insulating layer (not shown); the first electrode 1211 and the second electrode The 1221 acts collectively as the signal output of the airflow sensor.

Specifically, in the first embodiment, the second friction layer 122 in each sensing unit 120 forms a closed sub-cavity with the inner wall of the hollow housing 110, and the first friction layer in each sensing unit 120. 121 is located inside the closed sub-cavity formed between the second friction layer 122 in the sensing unit 120 and the inner wall of the hollow casing 110 (as shown in FIG. 1a). It can be seen that the sealing form adopted in the first embodiment is characterized in that each sensing unit is sealed independently of each other, thereby forming a separate sealing sub-cavity inside each sensing unit. Moreover, in the sealing method of the first embodiment, the sealing can be directly achieved by the second electrode in the second friction layer 122, and the sealing method is simple and the cost is low.

Next, the various components included in the airflow sensor in the first embodiment are respectively introduced:

Specifically, the structure of the hollow casing 110 is a hollow structure, and the shape thereof may be a hollow cylindrical shape, a hollow prism shape, a hollow truncated cone shape, and a hollow prism shape, and the like. For example, as shown in Figures 1a and 1b, the hollow housing 110 of Figures 1a and 1b is hollow cylindrical. In the material, the hollow housing 110 may be an insulating material or a non-insulating material, which is not limited in the present invention. Among them, the material of the hollow casing 110 is preferably an insulating material.

Each of the sensing units 120 is sealingly disposed on the inner wall of the hollow casing 110, and one side surface of the sensing unit 120 is partially or completely fitted to the inner wall of the hollow casing 110 (as shown in FIG. 1b). The portion in which the inside of the hollow casing 110 is not provided with the sensing unit 120 (i.e., the hollow portion of the hollow casing 110 shown in Figs. 1a and 1b) forms an air flow passage for gas circulation. Wherein, one side surface of the sensing unit 120 can completely fit on the inner wall of the hollow casing 110, so that the fixing of the sensing unit 120 is more firm; or one side surface of the sensing unit 120 can also be partially attached thereto. The inside of the hollow casing 110, for example, only needs to be attached to the inner wall of the hollow casing 110 at the two ends or intermediate portions of the sensing unit 120, etc., so that the fitting manner of the sensing unit 120 is more flexible. In a specific implementation, the manner in which the sensing unit 120 is attached to the inner wall of the hollow casing 110 can be set by a person skilled in the art according to actual conditions, which is not limited by the present invention. The number of sensing units 120 may be two or more, and the present invention does not limit the specific number of sensing units 120.

Each sensing unit 120 further includes a first friction layer 121 and a second friction layer 122. Wherein, the first friction layer 121 is partially or completely fitted and fixed on the inner wall of the hollow casing 110, and its shape matches the shape of the inner wall of the hollow casing 110 (as shown in FIG. 1b); the second friction layer 122 and The first friction layer 121 is oppositely disposed to rub against the first friction layer 121 under the action of the airflow inside the airflow passage when the gas passes through the airflow passage. Specifically, in the embodiment, the second friction layer 122 may be an arc-shaped friction layer, and a gap is formed between the second friction layer 122 and the first friction layer 121 (for example, the gap may be formed on the second friction layer 122). Or the second friction layer may also be a friction layer laminated with the first friction layer (for example, the second friction layer is all attached to the first friction layer, or the second The friction layers of other structures, such as the two ends of the friction layer, are attached to the inner wall of the casing so as to be laminated with the first friction layer. Specifically, when the second friction layer 122 is an arc-shaped friction layer, the arc-shaped friction layer is designed in a manner to ensure effective separation between the two friction layers, thereby preventing effective separation after mutual contact due to material aging. The situation happened. The position where the gap is formed between the second friction layer 122 and the first friction layer 121 is preferably the middle portion of the second friction layer 122 to achieve an optimum friction effect. However, it is to be understood that the position of the gap may be the two ends of the second friction layer or other suitable positions, which is not limited by the present invention. When the second friction layer 122 is a friction layer laminated with the first friction layer 121, the airflow flowing through the inside of the air flow channel may act on the first friction layer 121, so that the first friction layer acts under the air flow and the second Friction layer friction generates an electrical signal; it can also act on the second friction layer 122, so that the second friction layer rubs against the first friction layer to generate an electrical signal under the action of the air flow; or, it can simultaneously act on the first friction layer and The entire unit of the second friction layer causes the friction layers in the entire sensing unit to rub against each other under the action of the air stream to generate an electrical signal. Of course, in addition to the arcuate friction layer, the second friction layer may also adopt various other structural forms that are advantageous for separation. For example, the second friction layer and the first friction layer may also together form an approximately triangular body sensing unit. So that the two friction layers achieve separation at the apex of the triangle. The unfolding shape of the inner surface of the first friction layer 121 and the second friction layer 122 may be a rectangle, or may be other shapes such as a circle or a polygon, which is not limited in the present invention. The first friction layer 121 and the second friction layer 122 together form a sensing unit, also called a friction generator. The case where the two friction layers rub against each other specifically includes a plurality of types: for example, the two friction layers are relatively displaced in the vertical direction (ie, the friction condition in the case where the two friction layers are stacked), and the two friction layers are The friction between the two is the frictional force in the vertical direction; or, the two friction layers are relatively displaced in the vertical direction and the horizontal direction, and the friction between the two friction layers includes both the vertical friction and the frictional force. The horizontal frictional force (i.e., the friction of the arched structure described above) achieves an optimal friction effect at this time. It is to be understood that the friction between the two friction layers includes, but is not limited to, the above two cases. For example, the friction of the two friction layers may also be a relative displacement in the horizontal direction. .

The friction generator in this embodiment will be specifically described below. In an alternative, the friction generator in this embodiment may be a three-layer friction generator. Correspondingly, the first friction layer 121 includes a first electrode 1211 and a first polymer insulating layer 1212; and the second friction layer includes a second electrode 1221. Specifically, the first polymer insulating layer 1212 is disposed on a side surface of the first electrode 1211 facing the second friction layer 122 (as shown in FIG. 1b). Of course, in other alternatives, the first friction layer 121 may also include only the first electrode 1211; the second friction layer 122 includes a second electrode 1221 and a second polymer insulating layer (not shown). And the second polymer insulating layer is disposed on a side surface of the second electrode 1221 facing the first friction layer 121. In the three-layer structure sensing unit, an electrical signal is generated by friction between the metal and the polymer, and since the metal easily loses electrons, the sensitivity of the output current can be improved.

In another alternative, the friction generator in this embodiment may be a four-layer friction generator. Correspondingly, the first friction layer 121 includes a first electrode 1211 and a first polymer insulating layer 1212; the second friction layer includes a second electrode 1221 and a second polymer insulating layer (not shown). Specifically, the first polymer insulating layer 1212 is disposed on a side surface of the first electrode 1211 facing the second friction layer 122; the second polymer insulating layer is disposed on a side of the second electrode 1221 facing the first friction layer 121 On the surface. In the four-layer sensing unit, an electrical signal is generated by friction between the polymer and the polymer, thereby achieving the same frictional power generation effect as the three-layer friction generator. Wherein, if the materials of the first polymer insulating layer and the second polymer insulating layer are the same, the amount of charge that causes triboelectric charging is small. Therefore, it is preferable that the materials of the first polymer layer and the second polymer layer are different.

Optionally, the friction generator in this embodiment may also be a friction generator of five layers of intervening film structure. Correspondingly, the first friction layer 121 includes a first electrode 1211 and a first polymer insulating layer 1212; the second friction layer includes a second electrode 1221 and a second polymer insulating layer (not shown). The first polymer insulating layer 1212 is disposed on a side surface of the first electrode 1211 facing the second friction layer 122; the second polymer insulating layer is disposed on a side surface of the second electrode 1221 facing the first friction layer 121. on. Further, an intervening film layer (not shown) is further disposed between the first polymer insulating layer 1212 and the second polymer insulating layer of the friction generator of the five-layer intermediate film structure. Wherein, the intervening film layer may be disposed on the inner surface of the first friction layer facing the second friction layer to cause friction between the intervening film layer and the second friction layer; or the intervening film layer may also be disposed on the second friction layer Facing the inner surface of the first friction layer to cause friction between the intermediate film layer and the first friction layer; or the intermediate film layer may be fixedly disposed between the first friction layer and the second friction layer, for example, The two ends of the intervening film layer are fixed on the casing, and the intervening film layer is located between the first friction layer and the second friction layer, so that the intervening film layer and the two friction layers respectively (ie: the first friction layer and the second layer) Friction layer) friction.

Optionally, the friction generator in this embodiment may also be a friction generator of a five-layer inter-electrode structure. Correspondingly, the first friction layer 121 includes a first electrode 1211 and a first polymer insulating layer 1212; the second friction layer includes a second electrode 1221 and a second polymer insulating layer (not shown). The first polymer insulating layer 1212 is disposed on a side surface of the first electrode 1211 facing the second friction layer 122; the second polymer insulating layer is disposed on a side surface of the second electrode 1221 facing the first friction layer 121. on. Further, an intervening electrode layer (not shown) is further disposed between the first polymer insulating layer 1212 and the second polymer insulating layer of the friction generator of the five-layer interposed electrode structure. Wherein, the intervening electrode layer may be disposed on the inner surface of the first friction layer facing the second friction layer to cause friction between the intervening electrode layer and the second friction layer; or the intervening electrode layer may also be disposed on the second friction layer Facing the inner surface of the first friction layer to cause friction between the intervening electrode layer and the first friction layer; or the intervening electrode layer may be fixedly disposed between the first friction layer and the second friction layer, for example, The two ends of the intervening electrode layer are fixed on the casing, and the intervening electrode layer is located between the first friction layer and the second friction layer, so that the intervening electrode layer and the two friction layers respectively (ie: the first friction layer and the second Friction layer) friction. In a friction generator of an intervening electrode structure, the first electrode, the second electrode and/or the intervening electrode layer together form an electrical energy output. Specifically, the first electrode and the second electrode may be connected to form a first group of output ends, and the intermediate electrode layer constitutes a second group of output ends, and the first group of output ends and the second group of output terminals are connected in parallel or in series, and are output together. Thereby, the sensitivity of the sensing unit can be improved.

Further, in the friction generator of the above various configurations, the first friction layer 121 refers to a friction layer inside each of the sensing units. The first friction layer 121 inside each sensing unit may be a friction layer integrally disposed on the inner surface of the hollow casing 110 so as to be covered by the second friction layer inside the sensing unit. It may be a friction layer partially interrupted on the inner surface of the hollow casing 110. When implemented by the latter, the first friction layer 121 further includes: a plurality of first sub-friction layers spaced apart from each other by a predetermined distance, and the specific number of layers of each of the first sub-friction layers depends on the form of the entire friction generator, for example Each of the first sub-friction layers may include only one first electrode, and may further include a first polymer insulating layer, and may even further include a first intervening film layer or a first intervening electrode layer. The distance between the respective first sub-friction layers can be flexibly set by those skilled in the art, and can be equal or unequal. When the first friction layer 121 is disposed as a plurality of first sub-friction layers, the second friction layer 122 respectively rubs with each of the first sub-friction layers, which is equivalent to further splitting a friction generator into a plurality of sub-generators, each The sub-generators can be connected in series or in parallel, which further enhances the flexibility and versatility of the airflow sensor.

Here, it should be noted that, in a specific implementation, those skilled in the art may use any of the above-mentioned friction generators as the sensing unit of the airflow sensor in the present invention, which is not limited in the present invention.

The sealing structure of the sensing unit 120 will be specifically described below. The sensing unit 120 is sealed and disposed inside the hollow casing 110. The sealing of the sensing unit 120 may be performed by using the friction layer in the sensing unit 120 as a sealing layer of the sensing unit 120 (for example, The second friction layer 122 in FIG. 1a is simultaneously disposed as a sealing layer), so as to ensure that the friction layer in the sensing unit 120 is not subjected to a separate sealing layer when rubbing (ie, except for the friction layer). The influence of the additional sealing layer is also included; and since the airflow acts directly on the friction layer, the friction layer generates friction under the direct action of the airflow, thereby generating and outputting a large-strength electrical signal, thereby using the friction layer as a seal The design of the layer can also effectively increase the output signal strength of the sensing unit; at the same time, the friction layer can also seal the sensing unit as a sealing layer, thereby ensuring that the internal structure of the sensing unit 120 is isolated from the external environment, so that the sensing The interior of the unit is not affected by external factors such as moisture. The second friction layer 122 of each of the sensing units 120 forms a closed sub-cavity with the inner wall of the hollow housing 110, and the first friction layer 121 of each sensing unit 120 is located at the sensing unit 120. The inside of the closed sub-cavity formed between the second friction layer and the inner wall of the hollow casing 110 (as shown in FIG. 1b). In order to more clearly show the sealing structure of the sensing unit 120, please refer to the structural schematic diagram of the airflow sensor shown in FIG. 1a. In FIG. 1a, for the sake of understanding, the second friction layer 122 of the sensing unit 120 further includes a sealing portion 1222 in addition to the second electrode 1221. In a specific implementation, the sealing portion 1222 may be a part of the second electrode 1221 for friction generating and outputting electrical signals, and is used together for sealing the sensing unit 120 (ie, the second friction layer is actually a whole, in FIG. 1a It is easy to understand to draw it separately, but those skilled in the art can understand that in the actual case, the second electrode 1221 and the first sealing portion 1222 together constitute the second electrode in the second friction layer). It can be seen that the second electrode in this embodiment is directly used for sealing the sensing unit in which it is located.

Wherein, each of the sealed sub-cavities is sealed with a certain amount of air, so that the air pressure in each of the closed sub-cavities is kept within a certain range, so as to prevent the first friction layer from being inside the vacuum of the closed sub-cavity Squeeze and friction cannot be achieved between the second friction layers. In a specific implementation, the air pressure in each of the closed sub-cavities ranges from at least 0.3 to 0.7 standard atmospheric pressure. Since the air pressure in the closed sub-cavity is slightly less than a standard atmospheric pressure, mutual friction between the two friction layers is facilitated.

Among them, in one air flow sensor, the number of the sensing units 120 is at least two (the number of the sensing units 120 shown in FIGS. 1a and 1b is four). The purpose of such an arrangement is to effectively reduce the safety hazard caused by setting the number of sensing units 120 to be too single (for example, when there is only one sensing unit 120 in the airflow sensor, if only the sensing If the unit 120 is damaged and not predicted in advance, the airflow sensor will not be used normally, and the sensitivity and accuracy of the output electrical signal can also be improved.

Specifically, in order to more clearly show the arrangement of the sensing unit 120 in the hollow housing 110, FIGS. 2a-2c respectively show hollow when a different number of sensing units are disposed on the inner wall of the hollow housing 110. An expanded view of the inner wall of the housing 110. 2a shows an exploded view of the inner wall of the hollow casing when two sensing units are disposed on the inner wall of the hollow casing; and FIG. 2b shows the middle of the four sensing units disposed on the inner wall of the hollow casing. An expanded view of the inner wall of the empty casing; and Fig. 2c shows an expanded view of the inner wall of the hollow casing when eight sensing units are disposed on the inner wall of the hollow casing. Here, it should be noted that the arrangement of the sensing unit shown in FIG. 2a - FIG. 2c is merely exemplary, and the setting of the sensing unit in the present invention includes but is not limited to the three cases shown above. Moreover, the number of sensing units in each airflow sensor in the present invention is not limited to the even number shown above, that is, the number of sensing units may also be an odd number of three or five, in short, as long as It is ensured that the number of sensing units in each air flow sensor is greater than or equal to two, and the present invention does not limit the number of sensing units in each air flow sensor.

The first electrode 1211 is provided with a wire connected to the electrode, the second electrode 1221 is provided with a wire connected to the electrode, and the first electrode 1211 and the second electrode 1221 output an electrical signal through the wire, thereby The first electrode 1211 and the second electrode 1221 are collectively used as a signal output end of the air flow sensor.

The working principle of the airflow sensor 100 will be described below, and the airflow sensor shown in Figs. 1a and 1b will be specifically described as an example. Specifically, when the airflow sensor is used, the user performs inhalation or exhalation. When the user performs inhalation, the inspiratory flow is formed in the airflow passage shown in FIGS. 1a and 1b, and the second friction layer 122 is in the second friction layer 122. The second electrode 1221 and the first polymer layer 1212 in the first friction layer 121 are subjected to contact friction under the action of the inspiratory flow to generate an electrostatic charge, and the generation of the static charge causes the first electrode 1211 and the second electrode 1221 to form. The electric charge is induced to form an electric field between the first electrode 1211 and the second electrode 1221. When the first electrode 1211 and the second electrode 1221 are connected by an external circuit, an alternating current electrical signal is formed in the external circuit, and the friction is generated. The generated inspiratory flow pressure electrical signal is output; similarly, when the user exhales, the expiratory flow is formed in the airflow passage shown in FIGS. 1a and 1b, and the first friction layer is separated from the second friction layer, An electrode 1211 and a second electrode 1221 output an expiratory flow pressure electrical signal. Wherein, the inspiratory flow pressure electrical signal is opposite to the expiratory flow pressure electrical signal. For example, if the inspiratory flow pressure electrical signal is a positive airflow pressure electrical signal, the expiratory flow pressure electrical signal is a negative airflow pressure electrical signal.

It can be seen that the air flow sensor provided by the present invention is realized by the principle of friction generation. The airflow sensor of the invention is provided with a moisture-proof structure, which ensures that the sensitivity and accuracy of the sensing unit in the airflow sensor are not affected by external factors such as moisture, so that the airflow sensor has high accuracy during operation and reduces airflow. The safety hazard of the sensor during use; at the same time, the air flow sensor provided by the invention also simplifies the manufacturing process, reduces the production cost, and brings convenience to industrial production and user use.

Embodiment 2

FIG. 3 is a cross-sectional structural diagram of an air flow sensor 300 according to Embodiment 2 of the present invention. As shown in FIG. 3, the airflow sensor 300 is different from the airflow sensor 100 of the first embodiment in that the second friction layer of the sensing unit 120 in the airflow sensor 300 further includes a sealing layer 1223, and the second electrode 1221 is disposed on the sealing layer 1223. Near the inner surface of the first friction layer.

Specifically, in the air flow sensor 300, the second friction layer is an arc-shaped friction layer, and a gap is formed between the second friction layer and the first friction layer; or the second friction layer may be stacked with the first friction layer. Friction layer of other structures such as friction layer. Wherein, when the second friction layer is an arc-shaped friction layer, the design of the arc-shaped friction layer is beneficial to ensure effective separation between the two friction layers, thereby preventing the situation from being effectively separated after mutual contact due to material aging. occur. Wherein, the position of the gap between the first friction layer and the second friction layer is preferably disposed in the middle of the second friction layer to achieve an optimal friction effect. However, it is to be understood that the position of the gap may be the two ends of the second friction layer or other suitable positions, which is not limited by the present invention. The second electrode 1221 and the sealing layer 1223 in the second friction layer are shown in FIG. As shown in FIG. 3, a sealing layer 1223 is wrapped around the second electrode 1221 of each sensing unit 120 for isolating each sensing unit 120 from the outside to protect the internal structure of the sensing unit 120 from being affected. At the same time, the sealing layer 1223 can further be used to support the second electrode 1221 to prevent the friction interface in the first friction layer and the second friction layer from being separated after contact (for example, A bonding occurs between the second electrode 1221 and the first polymer insulating layer 1212, and the two cannot be separated, thereby causing the occurrence of effective friction between the two under the action of the airflow, which is beneficial to the separation between the friction interfaces. , thus ensuring the friction effect. Therefore, the sealing layer 1223 can also be referred to as a hermetic support layer.

The remaining components of the airflow sensor in the second embodiment are the same as those in the first embodiment, and are not described herein again.

Embodiment 3

FIG. 4 is a schematic structural view of an air flow sensor 400 according to Embodiment 3 of the present invention. As shown in FIG. 4, the air flow sensor 400 includes a hollow casing 410, at least two sensing units (not shown) disposed inside the hollow casing 410, and a communication sealing layer 420. The hollow housing 410 is disposed in the same manner as the hollow housing 110 in the first embodiment, and details are not described herein again. The sensing unit and the communication sealing layer 420 will be specifically described below.

Specifically, the sensing unit in the third embodiment is different from the sensing unit 120 in the first embodiment in that, in the first embodiment, the sensing of each sensing unit in the first embodiment is different. In the unit, the second friction layer acts as and only serves as a friction layer of the sensing unit, and each of the sensing units is sealed by the communication sealing layer 420. In addition, the other arrangement manners of the sensing unit in the third embodiment are the same as those in the first embodiment, and are not described herein again.

Specifically, as shown in FIG. 4 , the above-mentioned communication sealing layer 420 is specifically disposed inside the hollow casing 410 of the air flow sensor 400 for forming a communication-type closed cavity with the inner wall of the hollow casing 410, and Each of the sensing units is disposed inside the communication-type closed cavity. The sensing unit in the air flow sensor 400 is disposed between the inner walls of the hollow casing 410 and sealed by the communication sealing layer 420 forming the communication-type closed cavity. The shape of the communication sealing layer 420 is matched with the hollow casing 410. The inside of the hollow casing 410 forms an air flow passage, and the gas directly acts on the communication sealing layer 420 when passing through the air flow passage, so as to be in the communication sealing layer 420. The sealed first friction layer and the second friction layer rub against each other to generate and output a corresponding electrical signal. Specifically, the working principle of generating and outputting the corresponding electrical signal is the same as that of the airflow sensor 100 in the first embodiment of the present invention, and details are not described herein again.

Further, in order to achieve a better sensing effect of the airflow sensor of the present invention, the airflow sensor of the present invention can also adopt the following two improvements.

Wherein, in an optional improvement, the first end cover and the second end cover are respectively disposed at two ends of the hollow shell of the air flow sensor, and the first end cover is provided with at least one air inlet hole, The two end caps are provided with at least one air outlet, the first end cover and the air inlet holes and the second end cover thereon and the air outlet holes thereon for forming an inflowing gas to form a vortex wind in the air flow passage. Wherein, the air flow passage is formed at a portion where the sensing unit is not disposed inside the hollow casing. Specifically, as shown in FIG. 5, FIG. 5 is a schematic structural view of an airflow sensor 500 improved by the improved manner in the present embodiment on the basis of the first embodiment of the present invention. The air flow sensor 500 further includes: a first end cover 130 and a second end cover 140, the first end cover 130 and the second end cover 140 are respectively disposed in the air flow sensor 500. The two ends of the empty casing 110 are respectively shaped to match the shape of the front and rear bottom surfaces of the hollow casing 110, and can be integrally assembled with the hollow casing 110 by mechanical assembly such as snapping or gluing. Moreover, the first end cover 130 is provided with at least one air inlet hole 131 for supplying gas, and the second end cover 140 is provided with at least one air outlet hole 141 for allowing gas to flow out, and the gas flows into the air flow through the air inlet hole 131. During the passage and outflow from the air outlet 141 through the air flow passage, the air inlet hole 131 on the first end cover 130 and the air outlet hole 141 on the second end cover 140 cause the inflowing gas to form a vortex wind in the air flow passage, the eddy current The wind causes the first friction layer 121 to contact friction with the second friction layer 122 to generate and output an electrical signal. The specific number and arrangement of the air inlets 131 and the air outlets 141 can be set by a person skilled in the art according to actual conditions, which is not limited in the present invention.

It should be understood that the above-mentioned improvement schemes for the first end cover and the second end cover can be applied not only in the first embodiment of the present invention, but also in the second embodiment or the third embodiment of the present invention. Personnel can choose according to their needs, which is not limited here.

In another optional refinement, at least one support member 150 is disposed on at least one of the two friction interfaces formed by the first friction layer and the second friction layer. Wherein, optionally, the at least one supporting member 150 is disposed at both ends and/or the middle portion of the friction interface, and the at least one supporting member comprises: a gasket and/or a spring. Specifically, the position of the support member 150 may be disposed by disposing the support member 150 on the friction layer of the first friction layer and the second friction layer adjacent to at least one side of the first end cover and the second end cover, respectively. And a central portion; and/or, the support member 150 is disposed on at least one of the axial sides of the friction layer of the first friction layer and the second friction layer adjacent to at least one of the first end cover and the second end cover, respectively. Wherein, at least one supporting member is preferably disposed at a middle portion of the friction interface to achieve a better friction effect, and in each sensing unit, the number of the supporting members 150 may be one or plural, and the present invention There is no limit to this.

By way of example, Figures 6a and 6b illustrate an alternative to the arrangement of support members 150 in the present invention. Wherein, as shown in FIG. 6a, the developed view of the friction interface of the support member 150 is rectangular, and the support member 260 is disposed at four corners of the friction interface, wherein the number of the support members 150 in the sensing unit is 4; as shown in FIG. 6b, the developed view of the friction interface of the support member 150 in FIG. 6b is a rectangle, and the support member 150 is disposed at the middle of the friction interface where the support member 150 is located, wherein the number of the support members 150 in the sensing unit is 2. Here, it is to be noted that the above-exemplified examples are merely illustrative, and the form and number of the support members 150 include, but are not limited to, the several examples listed above, for example, the support member 150 in each sensing unit. The number can also be 1, 3, and so on. In a specific implementation, the specific configuration and the number of the support members 150 can be set by a person skilled in the art according to actual conditions, which is not limited by the present invention.

The arrangement of the support member 150 can effectively prevent the occurrence of unnecessary bonding between the two friction layers or the occurrence of inseparability and the like, and facilitate the separation between the friction interfaces, thereby ensuring the friction effect.

In order to make the improvement scheme clearer and easier to understand, please refer to the two legends given below (Figure 7 and Figure 8). FIG. 7 is a schematic structural diagram of the airflow sensor 700 improved by the improved manner in the present embodiment on the basis of the first embodiment of the present invention. FIG. 8 is a schematic structural diagram of an airflow sensor 800 improved by the improved manner in the present embodiment on the basis of the second embodiment of the present invention. In FIGS. 7 and 8, the support member 150 is disposed on the first polymer insulating layer 1212 of the first friction layer, in the middle of the first polymer insulating layer 1212 on the first friction layer. In addition, although the support member 150 in the example given in FIGS. 7 and 8 is disposed on the first friction layer, it can be understood that, in a specific implementation, the support member 150 is not limited to being disposed only on the first friction layer. In the case, the support member 150 may also be disposed on the second friction layer. Here, as long as the non-essential fit between the two friction layers can be effectively prevented or the separation cannot occur, the person skilled in the art can set the support member 150 on the inner surface of the at least one friction layer according to the actual situation (also The inner surfaces of the two friction layers can be disposed at the same time, which is not limited in the present invention.

It should be understood that the above-mentioned improvement of the support structure 150 can be applied not only in the first embodiment of the present invention, but also in the second embodiment or the third embodiment of the present invention, and those skilled in the art can select according to requirements. This is not a limitation.

Here, it should be noted that the above two improvements may be used alone or in combination. In a specific implementation, one or two of the above-mentioned improvements may be selected by a person skilled in the art according to actual conditions, which is not limited herein.

Finally, an atomizer fabricated based on the airflow sensor provided by any of the above embodiments is described. 9a and 9b are schematic views of an atomizer according to still another embodiment of the present invention. 9a is a functional block diagram of an atomizer according to Embodiment 4 of the present invention, and FIG. 9b is a schematic structural diagram of an atomizer according to Embodiment 4 of the present invention. As shown in Figures 9a and 9b, the atomizer includes a liquid storage component 910, a nozzle airflow monitoring component 920, and an atomizer body 930. The liquid storage component 910 is disposed on the atomizer body 930, and is connected to the atomizer body 930. Specifically, the liquid storage component 910 is sealingly connected with the atomizer body 930 for storing the liquid medicine to be atomized and sprayed; The nozzle airflow monitoring component 920 is disposed on the liquid storage component 910, and is connected to the liquid storage component 910 for outputting the airflow pressure electrical signal according to the airflow generated by the user inhaling or exhaling, and will be atomized after passing through the atomizer body 930. The liquid medicine is sprayed into the nose and mouth of the user; the atomizer body 930 is electrically connected to the nozzle airflow monitoring member 920 for atomizing the liquid medicine stored in the liquid storage member 910, and is sprayed to the nozzle airflow monitoring member 920. The airflow pressure electrical signal output by the airflow sensor is processed.

Optionally, the liquid storage component 910 includes a cover body and a receiving cavity. Specifically, the cover body and the receiving cavity are connected by a flip cover, and the cover body can be opened or closed, and the cover body is provided with a snap mechanism for sealingly engaging the cover body and the receiving cavity. When adding or pouring the liquid medicine, it is only necessary to open the buckle mechanism on the cover body, so that the cover body can be opened; when the liquid medicine is not added or poured, it is only necessary to close the buckle mechanism on the cover body, thereby The cover can be closed and sealingly engaged with the receiving cavity. The accommodating cavity is configured to store the liquid medicine to be atomized and sprayed, and the accommodating cavity is provided with an atomizing port and a liquid outlet, and the atomizing port is connected to the atomizer body 930, and the liquid outlet is connected to the nozzle airflow monitoring component 920. The atomizer main body 930 atomizes the liquid medicine stored in the accommodating cavity through the atomizing port on the accommodating cavity, and ejects into the inside of the nozzle airflow monitoring part 920 through the liquid outlet on the accommodating cavity, and then ejects to the user. In the mouth and nose.

Taking the atomizer body 930 as a compressed air atomizer as an example, the structure of the liquid storage component can be as shown in FIG. 9c. Referring to FIG. 9b and FIG. 9c, the liquid storage component 910 includes a cover body 911 and a receiving cavity 912. An atomizing port 913 is defined in an intermediate portion of the bottom surface of the receiving cavity 912. The atomizing port 913 is respectively connected to the atomizer body 930 and the air flow channel 914. The upper portion of the side wall of the receiving cavity 912 is provided with a liquid outlet 915. The liquid outlet 915 is connected to the nozzle airflow monitoring unit 920. A pipette 916 is disposed at a position adjacent to the air flow passage 914 in the accommodation cavity 912, and a barrier 917 is further disposed at an air outlet adjacent to the air flow passage 914. The liquid pipe 916 is used for sucking the liquid medicine stored in the accommodating cavity 912. The compressed air generated by the atomizer body 930 flows in from the atomizing port 913, and flows into the accommodating cavity 912 through the air flow passage 914, and the compressed air passes through. The air flow passage 914 forms a high-speed air flow when the air outlet is small, and the generated negative pressure drives the liquid medicine in the liquid suction pipe 916 to be sprayed on the barrier 917 together, and splashes to the surroundings under high-speed impact to make the liquid droplets become misty particles. The liquid port 915 is ejected.

Optionally, the nozzle airflow monitoring component 920 includes a nozzle body (not shown) and an airflow sensor (not shown). The nozzle body is disposed on the liquid storage component 910, and is connected to the liquid storage component 910. The nozzle body can adopt the atomizer nozzle of the prior art, for example, the nozzle of the cylindrical cylindrical structure as shown in FIG. 9b. A person skilled in the art can select according to actual needs, which is not limited herein; the air flow sensor is disposed inside the nozzle body, and is used for converting the pressure of the airflow generated by the user's inhalation or exhalation on the airflow sensor into the airflow pressure electric signal output. .

The air flow sensor is specifically any one of the air flow sensors shown in the first embodiment to the sixth embodiment. In the specific implementation, one or more of the airflow sensors shown in the first embodiment to the sixth embodiment may be selected by those skilled in the art according to the actual situation, which is not limited by the present invention.

In addition, an air flow sensor may be disposed inside the nozzle body, or a plurality of air flow sensors may be disposed. The advantage of providing an air flow sensor inside the nozzle body is that the structure is simple and easy to implement, and the atomizer is more simple in structure; the advantage of providing a plurality of air flow sensors inside the nozzle body is that it can be induced in different directions. The pressure exerted by the airflow generated by the user's inhalation or exhalation makes the atomizer more sensitive and the monitoring result more accurate.

Wherein, when an airflow sensor is disposed inside the nozzle body, the airflow sensor is electrically connected to the atomizer body 930, and the plurality of airflow pressure electrical signals output by the airflow sensor are analyzed and calculated by the pretreatment of the atomizer body 930. Information such as atomization airflow information; when a plurality of airflow sensors are disposed inside the nozzle body, the plurality of airflow sensors may be electrically connected to the atomizer body 930, respectively, and the plurality of airflow sensors correspond to the plurality of airflow pressures outputted The signals are respectively subjected to pre-treatment of the atomizer body 930 to analyze and calculate information such as atomizing airflow information. It should be noted that when a plurality of air flow sensors are disposed inside the nozzle body, a connection between the plurality of air flow sensors and between the plurality of air flow sensors and the atomizer body 930 can be performed by a person skilled in the art according to actual conditions. The connection relationship is set, and the present invention does not limit this.

In addition, when a plurality of air flow sensors are disposed inside the nozzle body, a plurality of air flow sensors may be disposed inside the nozzle body in a longitudinal direction along the longitudinal direction of the nozzle body; or, a plurality of air flow sensors may be disposed The interior of the nozzle body is disposed along the lateral direction of the nozzle body, in a tangent arrangement, or other type of arrangement. It should be noted that when a plurality of air flow sensors are disposed inside the nozzle body, those skilled in the art can set the arrangement of the plurality of air flow sensors disposed inside the nozzle body according to actual conditions, and the present invention No restrictions.

Optionally, the atomizer body 930 further includes: a plurality of signal pre-processing modules 931 and a central control module 932. The plurality of signal pre-processing modules 931 are respectively electrically connected to the respective sensing units of the airflow sensors in the nozzle airflow monitoring component 920 for pre-processing the respective airflow pressure electrical signals corresponding to the respective sensing units; The control module 932 is electrically connected to the plurality of signal pre-processing modules 931, and is configured to extract, from the plurality of pre-processed airflow pressure electrical signals, the airflow pressure electrical signals whose signal values are greater than a preset threshold, according to the airflow whose signal value is greater than a preset threshold. The pressure electrical signal calculates the atomizing airflow information.

Further, as shown in FIG. 9d, the signal pre-processing module 931 may include: a rectification module 9311, a filtering module 9312, an amplification module 9313, and an analog-to-digital conversion module 9314. The rectifying module 9311 is electrically connected to the airflow sensor in the nozzle airflow monitoring component 920 for rectifying the airflow pressure electrical signal output by the airflow sensor; the filtering module 9312 is electrically connected to the rectifying module 9311, and is used for rectifying the processing. The airflow pressure electrical signal is filtered to filter the interference clutter; the amplification module 9313 is electrically connected to the filtering module 9312, and is used for amplifying the filtered airflow pressure electrical signal; the analog-to-digital conversion module 9314 and the amplification module 9313 The electrical connection is used to convert the analog airflow pressure electrical signal output by the amplification module 9313 into a digital airflow pressure electrical signal, and output the converted digital airflow pressure electrical signal to the central control module 932. It should be noted that the foregoing modules (ie, the rectification module 9311, the filtering module 9312, the amplification module 9313, and the analog-to-digital conversion module 9314) may be selected according to the needs of those skilled in the art, which are not limited herein. For example, the airflow pressure electrical signal output by the airflow sensor in the nozzle airflow monitoring component 920 does not need to be rectified, and the rectifier module 9311 can be omitted.

Further, the airflow sensor in the nozzle airflow monitoring component 920 can distinguish between the airflow pressure electrical signals obtained by the pressure conversion of the airflow generated by the user's inhalation or exhalation. Specifically, the airflow sensor in the nozzle airflow monitoring component 920 is further configured to: convert the pressure exerted by the user's inhaled airflow on the airflow sensor into an inspiratory airflow pressure electrical signal output; and apply the airflow generated by the user's exhalation to the airflow. The pressure on the sensor is converted to an expiratory flow pressure electrical signal output. For example, the inspiratory flow pressure electrical signal is a positive airflow pressure electrical signal, and the expiratory flow pressure electrical electrical signal is a negative airflow pressure electrical signal. In this case, the signal pre-processing module 931 is further configured to: pre-process the inspiratory flow pressure electrical signal and the expiratory flow pressure electrical signal output by the airflow sensor.

The central control module 932 is specifically configured to: calculate the atomization airflow information according to a maximum value and/or an average value corresponding to the airflow pressure electrical signal whose signal value is greater than a preset threshold.

The preset threshold is set according to a voltage threshold range when the plurality of sensing units are not working. In a specific implementation, the preset threshold may be set by a person skilled in the art according to actual conditions. For example, if the threshold voltage of the plurality of sensing units is 0-10 mV, the preset threshold is set to 10 mV. When calculating the atomization airflow information, the central control module first receives the signal values of the plurality of inhaled or exhaled airflow pressure electrical signals sent by each sensing unit in the airflow sensor, and then analyzes and calculates each sensor unit to send a peak in a plurality of inhaled or exhaled airflow pressure electrical signals (ie, a maximum of a plurality of inhaled or exhaled airflow pressure electrical signals transmitted by each sensing unit), and the peak is taken as The signal value corresponding to the sensing unit. Then, it is further determined whether each signal value is greater than the preset threshold. If the judgment result is no, it indicates that the sensing unit is in an abnormal working state, that is, the sensing unit is damaged, and the abnormality is automatically generated in the abnormal working state. The count is incremented by one; if the result of the determination is YES, it indicates that the sensing unit is in a normal working state, that is, the sensing unit is not damaged, and it is not necessary to count in the abnormal working state. After the judgment of each signal value is completed, the total number of final abnormal working state counts is obtained as a counting result.

In an optional solution, the central control module calculates the atomization airflow information according to a maximum value corresponding to the airflow pressure electrical signal whose signal value is greater than a preset threshold. Specifically, the central control module is provided with a preset value, which is set by a person skilled in the art according to actual conditions, for example, may be set to half of the total number of sensing units, and the like. In this solution, after the counting process is completed, the central control module further determines whether the counting result is less than the preset value. If the determination result is yes, the central control module further acquires the airflow pressure electrical signal whose signal value is greater than a preset threshold. The corresponding maximum value is used as the atomization airflow information; if the judgment result is no, an alarm command is issued to the alarm module. The maximum value corresponding to the airflow pressure electrical signal can reflect the optimal airflow state of the airflow channel inside the airflow sensor, and can be adopted when the user pays more attention to the airflow state of the airflow channel.

In another optional solution, the central control module calculates the atomization airflow information according to an average value corresponding to the airflow pressure electrical signal whose signal value is greater than a preset threshold. Specifically, the central control module is provided with a preset value, which is set by a person skilled in the art according to actual conditions, for example, may be set to half of the total number of sensing units, and the like. In this solution, after the counting process is completed, the central control module further determines whether the counting result is less than the preset value. If the determination result is yes, the central control module further acquires the airflow pressure electrical signal whose signal value is greater than a preset threshold. The corresponding average value is used as the atomization airflow information; if the judgment result is no, an alarm command is issued to the alarm module. The average value corresponding to the airflow pressure electrical signal can reflect the average airflow state of the airflow channel inside the airflow sensor, and can be adopted when the user pays more attention to the average airflow state of the airflow channel.

Optionally, FIG. 9e is a schematic diagram of a functional structure of another atomizer provided by the embodiment. Specifically, the atomizer body shown in FIG. 9e further includes an alarm module 940 as compared with the atomizer shown in FIG. 9a. The alarm module 940 is connected to the central control module 932, and is configured to generate a fault alarm signal when the number of airflow pressure electrical signals whose signal value extracted by the central control module 932 is greater than a preset threshold is less than a preset value.

Specifically, after the central control module 932 calculates the atomization airflow information, the central control module 932 further determines whether the number of the airflow pressure electrical signals whose extracted signal value is greater than a preset threshold is less than a preset value, and if the determination result is yes, The central control module 932 sends an alarm command to the alarm module 940. After receiving the alarm command, the alarm module 940 generates a fault alarm signal to remind the user or the medical personnel that the atomizer has a safety hazard, and informs the user or the medical personnel of the atomizer. If the sensing unit of the air flow sensor is damaged, the broken air flow sensor or atomizer should be replaced in time. The fault alarm signal may be a fault alarm signal such as a voice signal or an indicator light signal, which is not limited by the present invention.

It can be seen that in the atomizer provided by the present invention, not only the moisture-proof structure is provided, but also the sensitivity and accuracy of the sensing unit of the airflow sensor in the atomizer are not affected by external factors such as moisture, so that atomization is achieved. The device has high accuracy in operation, and can also detect and remind the damage of the sensing unit in the atomizer, thereby reducing the safety hazard of the application atomizer in use; meanwhile, in the present invention The atomizer also simplifies the manufacturing process, reduces production costs, and brings convenience to both industrial production and user use.

The various modules and circuits mentioned in the present invention are circuits implemented by hardware. Although some of the modules and circuits integrate software, the present invention protects the hardware circuits of the functions corresponding to the integrated software, not just the hardware circuits. It is the software itself.

Those skilled in the art will appreciate that the device structures shown in the figures or embodiments are merely schematic and represent logical structures. The modules displayed as separate components may or may not be physically separate, and the components displayed as modules may or may not be physical modules.

In the meantime, it is to be noted that the above-mentioned examples are only specific embodiments of the present invention, and those skilled in the art can change and modify the present invention, provided that such modifications and variations are within the scope of the claims and equivalents thereof. All should be considered as the scope of protection of the present invention.

Claims

An air flow sensor, comprising: a hollow housing, at least two sensing units disposed inside the hollow housing, wherein

Each sensing unit includes a first friction layer and a second friction layer; wherein the first friction layer is fixed on an inner wall of the hollow casing, and the second friction layer is opposite to the first friction layer And a gas flow passage is formed inside the hollow casing, and an air flow inside the air flow passage acts on the first friction layer and/or the second friction layer to make the first friction layer and the second friction The layers rub against each other;

The at least two sensing units form a closed space, and the sealed space is not in communication with the air flow passage.
The air flow sensor according to claim 1, wherein the first friction layer includes a first electrode, the second friction layer includes a second electrode, and the first electrode faces the second friction layer Further, a first polymer insulating layer is further disposed on the side surface, and/or a second polymer insulating layer is further disposed on a side surface of the second electrode facing the first friction layer; The first electrode and the second electrode collectively function as a signal output of the airflow sensor.
The air flow sensor according to claim 1, wherein a second friction layer in each of the sensing units forms a closed sub-cavity with an inner wall of the hollow casing, and the first of the sensing units A friction layer is located inside the closed sub-cavity formed between the second friction layer in the sensing unit and the inner wall of the hollow housing.
The air flow sensor according to claim 3, wherein the second friction layer is an arc-shaped friction layer, and a gap is formed between a middle portion of the second friction layer and the first friction layer; or The second friction layer is a friction layer laminated with the first friction layer;

And, the second friction layer further includes: a sealing layer, wherein the second electrode is disposed on an inner surface of the sealing layer.
The air flow sensor according to claim 3 or 4, wherein the air pressure in each of the closed sub-cavities is 0.3-0.7 standard atmospheric pressure.
The air flow sensor according to claim 1, wherein the inner portion of the hollow casing is further provided with a communication sealing layer that forms a communication-type closed cavity with an inner wall of the hollow casing, and each The sensing unit is disposed inside the connected closed cavity.
The air flow sensor according to claim 6, wherein the air pressure in the communication type closed cavity is 0.3 to 0.7 standard atmospheric pressure.
The air flow sensor according to any one of claims 1 to 7, wherein at least one of the two friction interfaces formed by the first friction layer and the second friction layer is provided with at least one support member.
The air flow sensor according to claim 8, wherein the at least one support member is disposed at both ends and/or the middle of the friction interface, and the at least one support member comprises: a spacer and/or a spring.
The air flow sensor according to any one of claims 1 to 9, wherein two ends of the hollow housing are respectively provided with a first end cover and a second end cover, and the first end cover is provided with At least one air inlet hole, the second end cover is provided with at least one air outlet hole; the first end cover and the second end cover are used for forming an inflowing gas to form a vortex wind in the air flow passage; The air flow passage is formed at a portion of the hollow casing where the sensing unit is not disposed;

And, the shape of the hollow casing includes at least one of the following shapes: a hollow cylindrical shape, a hollow prism shape, a hollow disk shape, and a hollow prism shape.
The air flow sensor according to claim 1, wherein the first friction layer comprises a plurality of first sub-friction layers spaced apart from each other by a predetermined distance.
The air flow sensor according to claim 1, wherein a first polymer insulating layer is further disposed on a side surface of the first electrode facing the second friction layer, and the second electrode is oriented When the second polymer insulating layer is further disposed on the side surface of the first friction layer, an intermediate between the first polymer insulating layer and the second polymer insulating layer is further disposed. Thin film layer or intervening electrode layer.
An atomizer, comprising: a liquid storage component, a nozzle airflow monitoring component, and an atomizer body, and the inside of the nozzle airflow monitoring component is provided with the airflow sensor according to any one of claims 1-12; among them,

The liquid storage component is connected to the atomizer body for storing the liquid medicine to be atomized and sprayed;

The nozzle airflow monitoring component is connected to the liquid storage component for converting the sensed airflow into a gas flow pressure electrical signal by the airflow sensor, and spraying the liquid medicine after being atomized by the atomizer body Into the user's mouth and nose;

The atomizer body is electrically connected to the nozzle airflow monitoring component for atomizing and spraying the chemical solution stored in the liquid storage component, and outputting the airflow sensor in the nozzle airflow monitoring component The airflow pressure electrical signal is processed.
The atomizer according to claim 13, wherein the number of airflow pressure electrical signals output by the airflow sensor in the nozzle airflow monitoring component is plural, and each of the airflow pressure electrical signals and the airflow sensor Each sensor unit has a one-to-one correspondence;

The atomizer body further includes:

a plurality of signal pre-processing modules are respectively electrically connected to the respective sensing units of the airflow sensor for pre-processing respectively with respective airflow pressure electrical signals corresponding to the respective sensing units;

The central control module is electrically connected to the plurality of signal pre-processing modules, and is configured to extract, from the pre-processed plurality of airflow pressure electrical signals, a flow pressure electrical signal whose signal value is greater than a preset threshold, according to the signal value being greater than a pre- The threshold airflow pressure electrical signal is used to calculate the atomization airflow information.
The atomizer according to claim 14, wherein the central control module is configured to: calculate the fog according to a maximum value and/or an average value corresponding to the airflow pressure electrical signal whose signal value is greater than a preset threshold Air flow information.
The atomizer according to claim 14 or 15, wherein the atomizer body further comprises:

The alarm module is connected to the central control module, and is configured to generate a fault alarm signal when the number of airflow pressure electrical signals whose signal value extracted by the central control module is greater than a preset threshold is less than a preset value.