Net type atomizing sheet structure with liquid medicine detection function and atomizer

Abstract

The utility model discloses a net type atomizing sheet structure with a liquid medicine detection function and an atomizer. The net type atomizing sheet structure comprises an atomizing sheet assembly and a control unit. The atomization piece assembly is arranged in a liquid medicine atomization channel and comprises a liquid medicine detection current-conducting plate, an insulation structure and a net type atomization piece which are sequentially connected in the liquid medicine output direction. The liquid medicine detection current-conducting plate and the insulation structure are provided with medicine outlet holes corresponding to the net type atomizer, and liquid medicine makes contact with the liquid medicine detection current-conducting plate, the insulation structure and the net type atomizing piece at the same time through the medicine outlet holes, so that a liquid medicine detection circuit used for collecting and conveying liquid medicine signals to the control unit is formed. And the control unit controls the net type atomizing sheet switch based on the liquid medicine signal. The insulation structure and the liquid medicine detection circuit board are installed on the atomization piece assembly, a liquid medicine detection circuit is formed when liquid medicine passes through the atomization piece assembly, so that real-time detection of the liquid medicine is achieved, liquid medicine residues can be reduced, inaccurate detection caused by bubbles is avoided, in addition, the liquid medicine can be prevented from being polluted by a liquid medicine detection probe, and the manufacturing difficulty of the atomization medicine cup is reduced.

Description

Technical Field

[0001] This utility model relates to the field of nebulizers, specifically to a mesh nebulizer structure with drug detection function and a nebulizer. Background Technology

[0002] The principle of a conventional mesh atomizer can be summarized as follows: the piezoelectric effect of the piezoelectric ceramic causes the micro-mesh to vibrate, breaking up the liquid medicine and releasing it into the air. The atomizing plate structure consists of a ring-shaped piezoelectric ceramic with metal layers plated on both sides, and then a micro-mesh atomizing plate is bonded to one of the metal layers. The material is generally stainless steel or stainless steel with a PI film bonded on it.

[0003] Because the vibration of the atomizing plate generates a large amount of heat, it is desirable to stop the machine immediately after the medication atomization is complete to prevent overheating and damage to the atomizing plate. A common method is to detect the remaining medication: a metal probe is placed inside the medication cup. The conductivity of the medication determines whether it has been completely atomized. Specifically, when the medication connects the atomizing plate and the probe, the probe detects a high voltage; when the medication level is too low to connect the atomizing plate and the probe, the probe detects a low voltage. This determines whether there is still medication in the medication cup. However, this method of medication detection has the following drawbacks:

[0004] 1. Contact between the probe and the liquid medicine may cause problems such as rusting or contamination of the liquid medicine, and the probe inside the medicine cup may make the design and production of the medicine cup more difficult;

[0005] 2. When the atomizing plate is working, it sprays air into the medicine cup. After a period of atomization, many air bubbles will exist on the inner wall of the medicine cup. These air bubbles may cover the probe, preventing the probe from contacting the medicine. This can cause the machine to falsely report that there is no medicine even if there is medicine in the medicine cup, resulting in abnormal shutdown.

[0006] 3. There is a distance between the probe and the atomizing plate, which means that after atomization, some liquid medicine can still come into contact with the atomizing plate but cannot contact the probe. The probe cannot detect the liquid medicine, and atomization stops, resulting in liquid medicine residue. This part of the liquid medicine can be atomized as much as possible by delaying the power off, but it is not stable enough and the problem of liquid medicine residue may still exist.

[0007] Therefore, how to overcome the shortcomings of the existing technology mentioned above has become the subject of this utility model. Utility Model Content

[0008] The purpose of this invention is to provide a mesh atomizing plate structure and atomizer with a drug liquid detection function.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0010] The first aspect of this utility model provides a mesh atomizing sheet structure with liquid detection function, including an atomizing sheet assembly and a control unit;

[0011] The atomizing plate assembly is arranged in a liquid atomization channel and includes a liquid detection conductive plate, an insulating structure and a mesh atomizing plate connected in sequence along the liquid output direction;

[0012] Both the liquid detection conductive plate and the insulating structure are provided with liquid outlet holes corresponding to the mesh atomizer. The liquid comes into contact with the liquid detection conductive plate, the insulating structure and the mesh atomizer through the liquid outlet holes, forming a liquid detection circuit for collecting and transmitting liquid signals to the control unit. The control unit controls the switching of the mesh atomizer based on the liquid signals.

[0013] Preferably, the shape of the drug outlet hole is the same as and corresponds to the shape of the micropore arrangement on the mesh atomizing plate.

[0014] Preferably, the lowest point of the drug outlet is consistent with the lowest point of the drug atomization channel to avoid drug residue.

[0015] Preferably, the lowest point of the drug outlet is slightly higher than the lowest point of the drug atomization channel, making it less likely for drug residue to remain, and ensuring stable electrical conduction when the drug detection conductive plate and the mesh atomizing sheet are in contact with the drug surface.

[0016] Preferably, the two ends of the dispensing hole on the insulating structure are rounded.

[0017] Preferably, the insulating structure is made of insulating rubber.

[0018] Preferably, the mesh atomizing sheet includes a micro-mesh, a first conductive driving layer, a piezoelectric ceramic sheet, and a second conductive driving layer connected sequentially along the drug output direction;

[0019] The mesh atomizing plate is electrically connected to the control unit via a connector, and transmits the drug liquid signal to the control unit. The control unit controls the switching of the mesh atomizing plate based on the drug liquid signal.

[0020] More preferably, the atomizing plate assembly is arranged in the liquid atomization channel formed by the connection between the medicine cup and the mist outlet, and the connector includes two sets of contacts and two sets of probes;

[0021] Two sets of contacts are connected to the mesh atomizing plate;

[0022] Two sets of probes are connected inside the medicine cup and are both electrically connected to the control unit;

[0023] One set of contacts connects the liquid detection circuit and the control unit after making contact with the corresponding probe, while the other set of contacts connects the mesh atomizing plate and the control unit after making contact with the corresponding probe.

[0024] More preferably, a probe support structure is provided between the contact and the probe, the probe support structure having a support hole for the probe to pass through, a contact support structure is provided on the side of the contact away from the probe, and the probe passes through the support hole and abuts against the contact support structure.

[0025] More preferably, a vibration damping pad is provided on both sides of the atomizing plate assembly, the atomizing plate assembly is limited between the two vibration damping pads, the two vibration damping pads are provided with through holes for the liquid medicine to pass through, and the two vibration damping pads and the atomizing plate assembly are clamped and fixed by the assembled medicine cup and the mist outlet.

[0026] More preferably, the probe support structure is integrally formed with a vibration isolation pad on the same side, and the contact support structure is integrally formed with a sealing ring arranged between the medicine cup and the mist outlet.

[0027] Preferably, the liquid signal is a voltage signal; the liquid detection circuit further includes a rectifier circuit for converting the voltage signal into a positive signal and a clamping circuit for stabilizing the positive signal to obtain a fixed voltage value. The output of the clamping circuit is electrically connected to the control unit, and the control unit controls the switch of the mesh atomizing plate based on the fixed voltage value and a preset voltage threshold.

[0028] The second aspect of this utility model provides an atomizer, including the above-described mesh atomizing plate structure.

[0029] The working principle and advantages of this utility model are as follows:

[0030] This invention eliminates the liquid detection probe on the nebulizer in the prior art. Instead, an insulating structure and a liquid detection circuit board are installed on the nebulizer assembly. When liquid passes through, a liquid detection circuit is formed to achieve real-time detection of the liquid. This improved solution can reduce liquid residue, avoid inaccurate detection due to air bubbles, and also prevent the liquid detection probe from contaminating the liquid, thus reducing the difficulty of manufacturing the nebulizer cup.

[0031] This invention places the probe on the outside of the drug outlet and isolates it from the drug atomization channel through a vibration damping pad, so that the probe does not come into contact with the drug, is not easy to rust, and avoids contaminating the drug. Attached Figure Description

[0032] Appendix Figure 1 This is a front view of the atomizing plate assembly according to an embodiment of the present utility model;

[0033] Appendix Figure 2This is a cross-sectional view of the atomizing plate assembly according to an embodiment of the present utility model;

[0034] Appendix Figure 3 This is a front view of the atomizer according to an embodiment of the present utility model;

[0035] Appendix Figure 4 This is a cross-sectional view of the atomizer according to an embodiment of the present utility model;

[0036] Appendix Figure 5 This utility model Figure 4 Partial schematic diagram;

[0037] Appendix Figure 6 This is an exploded view of the atomizer according to an embodiment of the present utility model;

[0038] Appendix Figure 7 This is an exploded view of the atomizing plate assembly, vibration damping pad, and sealing ring in an embodiment of this utility model;

[0039] Appendix Figure 8 This is a circuit diagram of an embodiment of the present invention.

[0040] In the above figures: 1. Atomizing plate assembly; 11. Drug liquid detection conductive plate; 111. First drug outlet; 12. Insulation structure; 121. Second drug outlet; 13. Mesh atomizing plate; 131. Micro-mesh; 132. Conductive driving layer one; 133. Piezoelectric ceramic sheet; 134. Conductive driving layer two; 14. First contact; 15. First probe; 16. Second contact; 17. Second probe; 18. Probe support structure; 181. Support hole; 19. Contact support structure; 2. Drug cup; 3. Atomizing port; 4. Vibration isolation pad; 41. Through hole; 5. Sealing ring; 6. Main unit. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0042] Example: The present invention will be clearly described below with illustrations and detailed description. Any person skilled in the art who understands the examples of the present invention can make changes and modifications based on the technology taught in the present invention without departing from the spirit and scope of the present invention.

[0043] The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the scope of this work. Singular forms such as “a,” “this,” “this,” “the,” and “the” as used herein also include plural forms.

[0044] The terms "first," "second," etc., used in this article do not specifically refer to order or sequence, nor are they intended to limit this case; they are merely used to distinguish components or operations described using the same technical terms.

[0045] The terms "connection" or "positioning" as used in this article can refer to two or more components or devices making direct physical contact with each other, or making indirect physical contact with each other, or to two or more components or devices operating or moving with each other.

[0046] The terms “include,” “including,” and “have” used in this article are all open-ended, meaning they include but are not limited to.

[0047] Unless otherwise specified, the terms used herein generally have their ordinary meaning in the context of the art, the subject matter, and the specific context. Certain terms used to describe this case will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the case.

[0048] The terms “front,” “back,” “up,” “down,” “left,” and “right” used in this article are directional terms. In this case, they are only used to describe the positional relationship between the structures and are not intended to limit the specific direction of the protection scheme or its actual implementation.

[0049] See appendix Figure 1-8 As shown, this embodiment provides a mesh atomizing plate structure with drug liquid detection function, including atomizing plate assembly 1 and control unit.

[0050] The atomizing plate assembly 1 is arranged in the liquid atomization channel formed by the connection of the medicine cup 2 and the mist outlet 3. The medicine cup 2 carries the liquid medicine, and its mouth and the mist outlet 3 are generally fixed by screws. The inner cavities of the two are connected to form a liquid atomization channel. The mist outlet 3 is used to install a mouthpiece or atomizing mask.

[0051] The atomizing plate assembly 1 includes a liquid detection conductive plate 11, an insulating structure 12, and a mesh atomizing plate 13 connected sequentially along the liquid output direction.

[0052] Each of the conductive plates 11 for detecting the liquid medicine is provided with a first drug outlet hole 111 corresponding to the mesh atomizer, and the insulating structure 12 is provided with a second drug outlet hole 121 corresponding to the mesh atomizer. The shape of the drug outlet hole is the same as and corresponds to the shape of the micropore arrangement on the mesh atomizing plate 13. The shape of the drug outlet hole and the shape of the micropore arrangement can be set to circular or square, etc., as needed. In this embodiment, for example... Figure 1 The shape shown is circular.

[0053] The liquid medicine comes into contact with the liquid medicine detection conductive plate 11, the insulating structure 12 and the mesh atomizing plate 13 simultaneously through the medicine outlet, forming a liquid medicine detection circuit for collecting and transmitting liquid medicine signals to the control unit. The control unit controls the switching of the mesh atomizing plate 13 based on the liquid medicine signals.

[0054] The drug solution signal is a voltage signal.

[0055] When the liquid medicine is output, it passes through the liquid medicine detection conductive plate 11 and the medicine outlet on the insulating structure 12 in sequence to reach the micro mesh 131 of the mesh atomizing plate 13. At this time, the liquid medicine detection conductive plate 11, the liquid medicine and the micro mesh 131 are connected and connected to form a liquid medicine detection circuit. The liquid medicine detection circuit sends the liquid medicine signal to the control unit in real time to determine whether the liquid medicine is present or not.

[0056] When there is liquid medicine, the liquid medicine can simultaneously contact the liquid medicine detection conductive plate 11, the insulating structure 12 and the micro mesh 131. Because the micro mesh 131 is charged, the control unit can detect the voltage. At this time, the control unit controls the mesh atomizing plate 13 to continue to operate and perform atomization.

[0057] When the liquid medicine is about to finish atomizing, and the liquid medicine cannot simultaneously contact the liquid medicine detection conductive plate 11, the insulating structure 12 and the micro mesh 131, the electrical connection between the liquid medicine detection conductive plate 11 and the micro mesh 131 is broken due to the lack of conductor connection. The control unit cannot detect the voltage. At this time, it is determined that the liquid medicine in the medicine cup 2 has been completely atomized, and the control unit controls the mesh atomizing plate 13 to stop working.

[0058] To ensure that there is virtually no residue of the medicine and to avoid affecting the sensitivity of the medicine detection circuit, the lowest point of the medicine outlet is slightly higher than the lowest point of the medicine atomization channel, so that there is as little medicine residue as possible. Currently, it can be achieved that only one drop remains. In addition, this height difference causes the medicine detection conductive plate 11 and the mesh atomizing sheet 13 to make contact with the medicine surface. The surface contact ensures good conductivity of the medicine detection circuit.

[0059] To prevent residual liquid from connecting the liquid detection conductive plate 11 and the mesh atomizing plate 13, the two ends of the outlet hole on the insulating structure 12 are rounded. When the liquid is basically completely atomized and only a little residue remains, the rounded corners can break the surface tension of the liquid on the insulating structure 12, disconnect the liquid detection circuit, and avoid affecting the detection accuracy, so that the mesh atomizing plate 13 will continue to work even when there is no liquid.

[0060] The insulating structure 12 is made of insulating rubber, which serves to isolate the insulating liquid detection conductive plate 11 and the mesh atomizing sheet 13 on the one hand, and on the other hand, it has a certain degree of elasticity to avoid the low amplitude of the mesh atomizing sheet 13 caused by hard connection.

[0061] See appendix Figure 2 As shown, the mesh atomizing sheet 13 includes a micro mesh sheet 131, a first conductive driving layer 132, a piezoelectric ceramic sheet 133, and a second conductive driving layer 134 connected sequentially along the liquid output direction.

[0062] In this embodiment, the mesh atomizing plate 13 is electrically connected to the control unit via a connector, and transmits the liquid medicine signal to the control unit. The control unit controls the switching of the mesh atomizing plate 13 based on the liquid medicine signal.

[0063] The control unit includes an atomizing plate driving circuit and a microcontroller.

[0064] See appendix Figure 6 As shown, the connector includes two sets of contacts and two sets of probes. The two sets of contacts are connected to the mesh atomizing plate 13, and the two sets of probes are connected to the medicine cup 2. One set of contacts and one set of probes each consist of one first contact 14 and one first probe 15. The first probe 15 is connected to a microcontroller via a wire. When the first contact 14 and the first probe 15 make contact, they connect the medicine detection circuit and the microcontroller to transmit a medicine signal to the microcontroller. The other set of contacts and two sets of probes each consist of two second contacts 16 and two second probes 17. The two second probes 17 are connected to the atomizing plate driving circuit via wires. When the two second contacts 16 and the two second probes 17 make contact, they connect the mesh atomizing plate 13 and the atomizing plate driving circuit, which can control the switching of the mesh atomizing plate 13. Both the first contact 14 and the second contact 16 are fixed to a connecting piece.

[0065] In other embodiments, the mesh atomizing plate 13 can also be electrically connected to the control unit via a direct wire connection, and the connection method does not affect the overall function of the device.

[0066] See appendix Figure 6-7 As shown, a vibration damping pad 4 is provided on both sides of the atomizing plate assembly 1. The atomizing plate assembly 1 is positioned between the two vibration damping pads 4. The two vibration damping pads 4 have through holes 41 for the liquid medicine to pass through. The two vibration damping pads 4 and the atomizing plate assembly 1 are clamped and fixed by the assembled medicine cup 2 and the mist outlet 3. The setting of the two vibration damping pads 4 avoids the low amplitude of the micro-mesh 131 caused by hard connection.

[0067] See appendix Figure 7As shown, to avoid wear and tear on the flexible contact caused by excessive contact force between the probe and the contact point, a probe support structure 18 is provided between the contact point and the probe. This probe support structure 18 has a support hole 181 for the probe to pass through. A contact support structure 19 is provided on the side of the contact point away from the probe, and the probe passes through the support hole 181 and abuts against the contact support structure 19. The probe support structure 18 is integrally formed with a vibration isolation pad 4 on the same side, and the contact support structure 19 is integrally formed with a sealing ring 5 arranged between the medicine cup 2 and the mist outlet 3. Both support structures, the vibration isolation pad 4, and the sealing ring 5 are made of elastic material. The two support structures can stably support the contact point and the probe, ensuring stable contact and extending service life.

[0068] See appendix Figure 8 As shown, the liquid detection circuit also includes a rectifier circuit for converting the voltage signal into a positive signal and a clamping circuit for stabilizing the positive signal to obtain a fixed voltage value. The output of the clamping circuit is electrically connected to the microcontroller. The microcontroller controls the switch on the atomizing plate drive circuit based on the fixed voltage value and a preset voltage threshold, thereby realizing the switching control of the mesh atomizing plate 13.

[0069] The rectifier circuit includes a rectifier diode D10. The input terminal T41 of the rectifier diode D10 is connected to the first probe 15 through a wire. The voltage signal output from the first probe 15 is rectified by D10 to become a positive signal.

[0070] The output of the rectifier circuit is connected to the clamping circuit, and a current-limiting resistor R19 is connected to the connection circuit to limit the current of the positive signal.

[0071] The clamping circuit includes rectifier diodes D11 and D9, which clamp the positive signal after current limiting. When there is liquid medicine in the medicine cup 2, the signal at point AD3 on the line between D11 and D9 remains stable at a fixed value of 4V. When there is no liquid medicine in the medicine cup 2, the signal disappears, and there is no signal at point AD3, with a fixed voltage of 0V.

[0072] The drug detection circuit also includes a filter circuit connected between D11 and D9. The filter circuit consists of a capacitor C18 and a resistor R25 connected in parallel, which is used to filter the signal at point AD3.

[0073] The clamping circuit is connected to the output pin VDD of the microcontroller. The microcontroller only needs to detect the AD3 signal and compare it with the preset voltage threshold. When the value of AD3 is higher than the voltage threshold, it will work normally. When the value of AD3 is lower than the voltage threshold, it will disconnect the atomizing plate drive circuit to achieve shutdown when there is no medicine.

[0074] This embodiment also provides an atomizer, including a main unit 6, a medicine cup 2, a mist outlet 3, and the above-mentioned mesh atomizing plate 13 structure.

[0075] The medicine cup 2 is located on the top of the main unit 6, and the control unit is located inside the main unit 6.

[0076] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A mesh atomizing sheet structure with drug liquid detection function, characterized in that: Includes atomizing plate assembly and control unit; The atomizing plate assembly is arranged in a liquid atomization channel and includes a liquid detection conductive plate, an insulating structure and a mesh atomizing plate connected in sequence along the liquid output direction; Both the liquid detection conductive plate and the insulating structure are provided with liquid outlet holes corresponding to the mesh atomizer. The liquid comes into contact with the liquid detection conductive plate, the insulating structure and the mesh atomizer through the liquid outlet holes, forming a liquid detection circuit for collecting and transmitting liquid signals to the control unit. The control unit controls the switching of the mesh atomizer based on the liquid signals.

2. The mesh atomizing sheet structure with drug liquid detection function according to claim 1, characterized in that: The shape of the drug outlet hole is the same as and corresponds to the shape of the micropore arrangement on the mesh atomizing plate.

3. The mesh atomizing sheet structure with drug liquid detection function according to claim 1, characterized in that: The two ends of the discharge hole located on the insulating structure are rounded.

4. The mesh atomizing sheet structure with drug liquid detection function according to claim 1, characterized in that: The insulation structure is made of insulating rubber.

5. The mesh atomizing sheet structure with drug liquid detection function according to claim 1, characterized in that: The mesh atomizing sheet includes a micro-mesh, a first conductive driving layer, a piezoelectric ceramic sheet, and a second conductive driving layer connected sequentially along the drug output direction. The mesh atomizing plate is electrically connected to the control unit via a connector, and transmits the drug liquid signal to the control unit. The control unit controls the switching of the mesh atomizing plate based on the drug liquid signal.

6. The mesh atomizing sheet structure with drug liquid detection function according to claim 5, characterized in that: The atomizing plate assembly is arranged in the liquid atomization channel formed by the connection between the medicine cup and the mist outlet, and the connector includes two sets of contacts and two sets of probes; Two sets of contacts are connected to the mesh atomizing plate; Two sets of probes are connected inside the medicine cup and are both electrically connected to the control unit; One set of contacts connects the liquid detection circuit and the control unit after making contact with the corresponding probe, while the other set of contacts connects the mesh atomizing plate and the control unit after making contact with the corresponding probe.

7. The mesh atomizing sheet structure with drug liquid detection function according to claim 6, characterized in that: A probe support structure is provided between the contact and the probe. The probe support structure has a support hole for the probe to pass through. A contact support structure is provided on the side of the contact away from the probe. The probe passes through the support hole and abuts against the contact support structure.

8. The mesh atomizing sheet structure with drug liquid detection function according to claim 7, characterized in that: A vibration damping pad is provided on both sides of the atomizing plate assembly. The atomizing plate assembly is limited between the two vibration damping pads. The two vibration damping pads are provided with through holes for the liquid medicine to pass through. The two vibration damping pads and the atomizing plate assembly are clamped and fixed by the assembled medicine cup and the mist outlet.

9. The mesh atomizing sheet structure with drug liquid detection function according to claim 8, characterized in that: The probe support structure is integrally formed with a vibration isolation pad on the same side, and the contact support structure is integrally formed with a sealing ring arranged between the medicine cup and the mist outlet.

10. A mesh atomizing sheet structure with drug liquid detection function according to claim 5, characterized in that: The liquid signal is a voltage signal; the liquid detection circuit also includes a rectifier circuit for converting the voltage signal into a positive signal and a clamping circuit for stabilizing the positive signal to obtain a fixed voltage value. The output of the clamping circuit is electrically connected to the control unit. The control unit controls the switch of the mesh atomizing plate based on the fixed voltage value and a preset voltage threshold.

11. An atomizer, characterized in that: It includes a medicine cup, a mist outlet, and a mesh atomizing plate structure as described in any one of claims 1-10.

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