CN218048632U

CN218048632U - Corrosion-resistant ultrasonic atomizer

Info

Publication number: CN218048632U
Application number: CN202123168477.5U
Authority: CN
Inventors: 杨帆; 陈志华; 龙毅
Original assignee: Zhejiang Qingyue Technology Co ltd
Current assignee: Zhejiang Qingyue Technology Co ltd
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2022-12-16
Anticipated expiration: 2031-12-16

Abstract

The utility model discloses a corrosion-resistant ultrasonic atomizer is equipped with piezoceramics piece and supply electrode, supply electrode sets up on the piezoceramics piece, the one side of piezoceramics piece is the atomizing face with the contact of atomized liquid, be equipped with ceramic protective coating on the atomizing face, be equipped with the polyimide film layer on the ceramic protective coating. The corrosion-resistant ultrasonic atomizer is provided with the ceramic protective layer and the polyimide film layer, the ceramic protective layer is positioned on the surfaces of the piezoelectric ceramic piece and the electrode of the ultrasonic atomizer, has the function of preliminarily protecting the piezoelectric ceramic piece and the electrode, and provides a good adhesion surface for the polyimide film layer; polyimide rete is made the membrane technology through knife coating, spin coating, drip coating, spraying etc. and is coated the ceramic protective layer surface, can repair the defect on ceramic protective layer surface and fill, promotes ceramic protective layer density, can promote the atomizer anti-chemical and electrochemical corrosion's ability to avoid the vacuole effect to cause the damage to ceramic protective layer.

Description

Corrosion-resistant ultrasonic atomizer

Technical Field

The utility model discloses a ultrasonic transducer technical field, concretely relates to corrosion-resistant ultrasonic atomizer.

Background

The atomizer is an electronic device with wide application, generates ultrasonic waves through high-frequency vibration of the piezoelectric ceramic plate so as to atomize liquid into gas, has good atomization, but is easy to generate ultrasonic cavitation corrosion on electrodes of the atomizer due to cavitation, and reduces the service life of the atomizer. In addition, for better use feeling, a user can add perfume, essential oil or medicines and the like into the atomized liquid to change the pH value of the atomized liquid, so that the electrodes and the piezoelectric ceramic pieces of the atomizer are easily damaged, and therefore corrosion-resistant coatings are added on the electrodes and the piezoelectric ceramic pieces by manufacturers. However, the coatings are all directed to chemical corrosion, other electrified conditions in some atomized liquid are small, the corrosion-resistant coatings are easy to fall off due to potential difference between equipment, and the corrosion-resistant coatings are not compact enough and can cause a cavitation effect to fall off under the condition of gas release, so that a good protection effect cannot be achieved.

Disclosure of Invention

To the problem that the atomizer among the above-mentioned prior art does not withstand electrochemical corrosion, the utility model provides a corrosion-resistant ultrasonic atomizer is equipped with the dual protective layer of ceramic protective coating and polyimide film layer, not only can resist general chemical corrosion, can also resist electrochemical corrosion, can avoid the cavitation effect moreover.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a corrosion-resistant ultrasonic atomizer, is equipped with piezoceramics piece and supply electrode, supply electrode sets up on the piezoceramics piece, the one side of piezoceramics piece is the atomizing face with the contact of atomized liquid, be equipped with ceramic protective coating on the atomizing face, be equipped with the polyimide film layer on the ceramic protective coating.

The utility model provides a technical scheme that its technical problem adopted further still includes:

in the corrosion-resistant ultrasonic atomizer, the ceramic protective coating is in a shape or a circle which is matched with the piezoelectric ceramic plate.

In the corrosion-resistant ultrasonic atomizer, the material of the ceramic protective coating is an inorganic non-metallic material.

A corrosion resistant ultrasonic atomizer as described above, said ceramic protective coating having a thickness of 5-30 μm.

In the corrosion-resistant ultrasonic atomizer, the thickness of the polyimide film layer is 5-40 μm.

The corrosion-resistant ultrasonic atomizer comprises a piezoelectric ceramic piece, a power supply electrode, a ceramic protective coating, a power supply electrode, a first electrode, a second electrode and a power supply, wherein the surface of the piezoelectric ceramic piece, which is back to an atomization surface, is a back surface, the power supply electrode comprises the first electrode and the second electrode, the first electrode of the piezoelectric ceramic piece is arranged on the atomization surface under the ceramic protective coating, the second electrode of the piezoelectric ceramic piece is arranged on the back surface, and the first electrode and the second electrode are respectively connected with an external power supply.

The corrosion-resistant ultrasonic atomizer is characterized in that the first electrode and/or the second electrode is made of one of zinc alloy, copper alloy and iron alloy, the surface of the first electrode and/or the second electrode is plated with an oxidation-resistant layer, and the oxidation-resistant layer is made of one of nickel, titanium and platinum or an alloy thereof.

The corrosion-resistant ultrasonic atomizer is provided with a controller for controlling the output power of the ultrasonic atomizer, and the first electrode and the second electrode are respectively and electrically connected with an external power supply through the controller.

According to the corrosion-resistant ultrasonic atomizer, the piezoelectric ceramic piece and the power supply electrode are coated with the waterproof sealing shell for preventing the atomized liquid from permeating, a water inlet is formed in the position, corresponding to the atomized surface, of the waterproof sealing shell, and the atomized surface is in contact with the atomized liquid through the water inlet.

The beneficial effects of the utility model are that: the utility model discloses a corrosion-resistant ultrasonic atomizer is equipped with ceramic protective layer and polyimide film layer, and the ceramic protective layer is located the piezoceramics piece and the electrode surface of ultrasonic atomizer, has the effect of preliminary protection piezoceramics piece and electrode, can protect piezoceramics piece and electrode not influenced by general chemical corrosion to provide a good attached surface for the polyimide film layer; polyimide rete is through knife coating, spin coating, drip coating, spraying etc. and is done membrane technology and coat to ceramic protective layer surface, can repair the filling to the defect on ceramic protective layer surface, promotes ceramic protective layer density, not only can promote the anti chemistry of atomizer and electrochemical corrosion's ability, avoids the vacuole effect to make the damage to ceramic protective layer moreover, falls to minimum with the influence of atomized liquid environmental change to the atomizer, prolongs its life by a wide margin.

The present invention will be further described with reference to the accompanying drawings and the detailed description.

Drawings

FIG. 1 is a schematic view of an embodiment of a corrosion resistant ultrasonic atomizer according to the present invention;

in the figure, 1, a piezoelectric ceramic plate, 11, an atomization surface, 12, a back water surface, 2, a ceramic protective coating, 3, a polyimide film layer, 41, a first electrode, 42, a second electrode, 5, a controller, 6, a waterproof sealing shell, 61, a water inlet, 7 and an external power supply.

Detailed Description

The embodiment is a preferred embodiment of the present invention, and other principles and basic structures are the same as or similar to those of the embodiment, and are within the protection scope of the present invention.

The utility model discloses a corrosion-resistant ultrasonic atomizer embodiment is shown according to fig. 1, is equipped with piezoceramics piece 1 and supply electrode, and supply electrode sets up on piezoceramics piece 1, and piezoceramics piece 1's one side is the atomizing face 11 with the contact of atomized liquid, and piezoceramics piece 1 one side of atomizing face 11 dorsad is surface of a back 12. In order to resist corrosion of the atomized liquid, a ceramic protective coating 2 is arranged on the atomization surface 11, and a polyimide film layer 3 is arranged on the ceramic protective coating 2. In this embodiment, in order to make the piezoelectric ceramic plate vibrate better, the power supply electrode includes a first electrode 41 and a second electrode 42, the first electrode 41 is a negative electrode and is disposed on the atomizing surface 11 under the ceramic protective coating 2, the second electrode 42 is a positive electrode and is disposed on the back water surface 12, and the first electrode 41 and the second electrode 42 are respectively connected to the external power supply 7.

In order to ensure the conductive effect of the power supply electrode material number, the first electrode 41 and the second electrode 42 in this embodiment are made of copper alloy, and when the specific production is implemented, one of zinc alloy and iron alloy may be selected; in order to avoid the oxidation of the power supply electrode during production or use and influence on the conductive effect, the surfaces of the first electrode 41 and the second electrode 42 of this embodiment are plated with an oxidation-preventing layer, the oxidation-preventing layer is made of a titanium-nickel alloy, and during the specific production implementation, the oxidation-preventing layer may be one of titanium, nickel, and platinum or an alloy thereof.

In order to ensure that the atomizer of this embodiment can normally work in the atomized liquid, the piezoelectric ceramic plate 1 and the power supply electrode of this embodiment are coated with a waterproof sealing shell 6 for preventing the atomized liquid from permeating, a circular water inlet 61 is arranged at a position of the waterproof sealing shell 6 corresponding to the atomizing surface 11, and the atomizing surface 11 is in contact with the atomized liquid through the water inlet 61, so as to ensure the atomization effect. In the concrete production implementation, besides the waterproof sealing shell 6, a sealing device, such as a rubber fixing sealing ring, a silica gel pad, a plastic sealing cabin and the like, which is matched with the ultrasonic atomizer can be arranged according to the installation environment of the ultrasonic atomizer.

In order to match with the water inlet 61, the ceramic protective coating 2 in this embodiment is a circle that matches with the shape of the water inlet 61, so that the position where the atomization surface 11 contacts with the atomized liquid can be protected, and in a specific production implementation, the ceramic protective coating 2 that matches with the shape of the whole piezoelectric ceramic plate 1 can be coated on the whole atomization surface 11 according to the use requirement. In order to ensure the durability of the ceramic protection layer 2, the ceramic protection layer 2 should be made of non-polar non-metal materials with non-shedding characteristics, such as zirconia, titania-alumina, and other inorganic non-metal materials with good compactness, and in this embodiment, zirconia is used.

In this embodiment, in order to obtain good corrosion protection for the ceramic protective coating 2, the polyimide film layer 3 is a circle with a diameter slightly larger than that of the ceramic protective coating 2, so that the ceramic protective coating 2 is completely covered under the polyimide film layer 3, so as to protect the atomization surface 11 of the atomizer to the maximum extent and ensure the corrosion resistance of the ultrasonic atomizer. In a specific production implementation, the polyimide film layer 3 with a shape matched with that of the whole piezoelectric ceramic plate 1 can be coated on the whole atomizing surface 11 according to the use requirement.

In this embodiment, in order to ensure that the ceramic protective coating 2 and the polyimide film 1 can be coated on the surface of the ultrasonic atomizer by a film-making process such as blade coating, spin coating, drop coating, spray coating, and the like, and are sequentially sintered and cured to form a film. The polyimide film raw material is preferably a liquid material with certain fluidity and viscosity, including but not limited to polyimide solution, polyamic acid, polyimide impregnation liquid, modified polyimide and the like, and the defects of the ceramic protective coating 2 can be repaired and filled, so that a compact protective layer can be formed, meanwhile, the adhesiveness and the surface electrical insulation of the film are improved, and the protective capability of the piezoelectric ceramic sheet 1 and the power supply electrode is improved.

The thickness of the ceramic protective coating 2 and the polyimide film 1 is required to a certain extent, and the ceramic protective coating cannot be too thick or too thin, and the ultrasonic atomization effect of the ultrasonic atomizer can be influenced by too thick and too thin. Wherein the sintered thickness of the ceramic protective coating 2 is preferably between 5 and 30 μm. The thickness of the polyimide film 1 after baking is preferably 5 to 40 μm. In this example, the thickness of the ceramic protective coating 2 after firing was 7 μm, and the thickness of the polyimide film 1 after baking was 5 μm.

In order to better control the atomization effect, the corrosion-resistant ultrasonic atomizer of the present embodiment is provided with a controller 5 for controlling the output power of the ultrasonic atomizer, and the first electrode 41 and the second electrode 42 are electrically connected to the external power supply 7 through the controller 5, respectively.

The beneficial effects of the present invention are demonstrated by the following experiments.

1. Design of experiments

The general ultrasonic atomizer and the corrosion-resistant ultrasonic atomizer of this example were placed in an environment where hydrogen peroxide solution was electrochemically prepared, the electric field in the environment was 12V, and after continuous operation for 72 hours, the surface of the piezoelectric ceramic sheet 1 was observed with an optical microscope.

2. Analysis of test results

The test result shows that after the ultrasonic atomizer with the polyimide film continuously works for 72 hours, the surface coating is still compact and smooth, and the piezoelectric ceramic plate 1 is effectively protected; and the ordinary ceramic atomization piece as the comparison experiment after 72h of continuous operation, the surperficial ceramic layer peels off seriously, and the electrode of atomizer exposes, and the surface has corroded the hole of various sizes, explains the utility model discloses a corrosion-resistant ultrasonic atomizer corrosion resistance is showing and is improving, has expanded the applicable scene of this invention greatly.

The utility model discloses a corrosion-resistant ultrasonic atomizer is equipped with ceramic protective layer and polyimide film layer, and the ceramic protective layer is located the piezoceramics piece and the electrode surface of ultrasonic atomizer, has the effect of preliminary protection piezoceramics piece and electrode, can protect piezoceramics piece and electrode not influenced by general chemical corrosion to provide a good attached surface for the polyimide film layer; polyimide film layer is through scrape coating, spin coating, drip coating, spraying etc. do the membrane technology and coat to ceramic protective layer surface, can repair the filling to the defect on ceramic protective layer surface, promote ceramic protective layer density, not only can promote the anti chemistry of atomizer and electrochemical corrosion's ability, avoid the cavitation effect to make the damage to ceramic protective layer moreover, fall to minimum with the influence of atomized liquid environmental change to the atomizer, prolong its life by a wide margin.

Claims

1. The utility model provides a corrosion-resistant ultrasonic nebulizer which characterized in that is equipped with piezoceramics piece (1) and power supply electrode, power supply electrode sets up on the piezoceramics piece (1), the one side of piezoceramics piece (1) is atomizing face (11) with the contact of atomized liquid, be equipped with ceramic protective coating (2) on atomizing face (11), be equipped with polyimide film layer (3) on ceramic protective coating (2).

2. An ultrasonic nebulizer as claimed in claim 1, characterised in that the ceramic protective coating (2) is of a shape or circular shape conforming to the piezoceramic wafer (1).

3. An ultrasonic atomizer according to claim 1, characterized in that the material of said ceramic protective coating (2) is an inorganic non-metallic material.

4. An ultrasonic atomiser according to claim 1, characterised in that the material of the ceramic protective coating (2) is one of zirconia, titania or alumina.

5. An ultrasonic atomizer according to claim 1, characterized in that the thickness of the ceramic protective coating (2) is 5-30 μm.

6. An ultrasonic atomizer according to claim 1, wherein the thickness of said polyimide film layer (3) is 5 to 40 μm.

7. The ultrasonic atomizer according to claim 2, wherein a surface of the piezoelectric ceramic plate (1) facing away from the atomizing surface (11) is a back surface (12), the power supply electrode comprises a first electrode (41) and a second electrode (42), the first electrode (41) of the piezoelectric ceramic plate (1) is disposed on the atomizing surface (11) under the ceramic protective coating (2), the second electrode (42) of the piezoelectric ceramic plate (1) is disposed on the back surface (12), and the first electrode (41) and the second electrode (42) are respectively connected with an external power supply (7).

8. An ultrasonic atomizer according to claim 7, wherein the material of said first electrode (41) and/or said second electrode (42) is one of zinc alloy, copper alloy and iron alloy, the surface of said first electrode (41) and/or said second electrode (42) is plated with an oxidation preventing layer, and the material of said oxidation preventing layer is one of nickel, titanium and platinum or its alloy.

9. An ultrasonic nebulizer as claimed in claim 8 wherein a controller (5) is provided for controlling the output power of the ultrasonic nebulizer, and the first electrode (41) and the second electrode (42) are electrically connected to an external power source (7) through the controller (5).

10. An ultrasonic atomizer according to any one of claims 1-9, wherein said piezoelectric ceramic plate (1) and said power supply electrode are externally covered with a waterproof sealed casing (6) for preventing the penetration of atomized liquid, a water inlet (61) is provided at a position of said waterproof sealed casing (6) corresponding to said atomization surface (11), and said atomization surface (11) is contacted with atomized liquid through said water inlet (61).