Atomizers and gas water heaters

Abstract

This utility model relates to the field of atomizer technology, and more particularly to an atomizer and a gas water heater. The atomizer includes a piezoelectric ceramic plate and a corrosion-resistant component. Along the vertical direction, the upper end face of the corrosion-resistant component bulges upward in an arc shape. The longitudinal section thickness of the middle portion of the corrosion-resistant component is greater than the longitudinal section thickness of its edge portion. The upper end face of the piezoelectric ceramic plate is bonded to the lower end face of the corrosion-resistant component using an adhesive. The gas water heater includes the aforementioned atomizer. The thickness variation of the corrosion-resistant component is adapted to the distribution of vibration energy, thereby enabling the center position of the corrosion-resistant component to withstand relatively large vibration energy impacts. This reduces the risk of premature failure of the piezoelectric ceramic plate due to cracking at the center position, thus improving the service life and reliability of the atomizer.

Description

Technical Field

[0001] This utility model relates to the field of atomizer technology, and in particular to an atomizer and a gas water heater. Background Technology

[0002] In a condensing gas water heater, an atomizer atomizes the condensate dripping from the outer wall of the heat exchange tubes into a water mist, which is then discharged along with the flue gas after heat exchange through the exhaust shell. The piezoelectric ceramic plate inside the atomizer receives a high-frequency electrical signal generated by an ultrasonic generator and vibrates at the same frequency, thereby transferring the high-frequency mechanical vibration energy to the liquid to produce atomization.

[0003] In related technologies, corrosion resistance is improved by attaching corrosion-resistant components (usually glass sheets) to piezoelectric ceramic sheets. Because the high-frequency vibration energy generated by the piezoelectric ceramic sheet is mainly concentrated at the center, with the energy decreasing gradually towards the edges, the glass sheet receives a greater share of the vibration energy when the energy is transferred. Consequently, during prolonged atomizer operation, the center of the glass sheet is prone to cracking, allowing condensate to directly contact the piezoelectric ceramic sheet, creating a corrosive environment and reducing the atomizer's lifespan and reliability. Utility Model Content

[0004] One of the technical problems solved by this invention is to provide an atomizer that can improve service life and reliability.

[0005] The second technical problem solved by this utility model is to provide a gas water heater that can improve the service life and reliability of the atomizer.

[0006] The first technical problem mentioned above is solved by the following technical solution:

[0007] The atomizer includes a piezoelectric ceramic sheet and a corrosion-resistant component. Along the vertical direction, the upper end face of the corrosion-resistant component is convex upward in an arc shape. The longitudinal section thickness of the middle part of the corrosion-resistant component is greater than the longitudinal section thickness of the edge part of the corrosion-resistant component. The upper end face of the piezoelectric ceramic sheet is fixed to the lower end face of the corrosion-resistant component by adhesive bonding.

[0008] The atomizer described in this utility model has the following advantages compared with the prior art:

[0009] The upper end face of the piezoelectric ceramic sheet is fixed to the lower end face of the anti-corrosion component using adhesive bonding. The upper end face of the anti-corrosion component is convex and arc-shaped, so the vibration pressure generated by the piezoelectric ceramic sheet during operation is evenly distributed throughout the anti-corrosion component. Compared with a flat design on the upper end face of the anti-corrosion component, this design is more impact-resistant and reduces the risk of breakage. At the same time, the longitudinal section thickness of the anti-corrosion component is greater in the middle than at the edges. The thickness variation of the anti-corrosion component is adapted to the distribution of vibration energy, allowing the center of the anti-corrosion component to withstand relatively large vibration energy impacts. This reduces the risk of premature failure of the piezoelectric ceramic sheet due to breakage at the center of the anti-corrosion component in a corrosive environment. The vibration generated by the piezoelectric ceramic sheet at the edges is more easily transmitted to the corresponding edges of the anti-corrosion component, improving the transmission efficiency of vibration energy at the edges of the piezoelectric ceramic sheet in the anti-corrosion component, improving the atomization performance of the atomizer, and thus improving the service life and reliability of the atomizer.

[0010] In one embodiment, the longitudinal section thickness at the middle position of the anti-corrosion component is T1, and the longitudinal section thickness at the edge position of the anti-corrosion component is T2, then 1.1T2≤T1≤1.5T2.

[0011] In one embodiment, along the vertical direction, the lower end face of the anti-corrosion component is concave upwards in an arc shape, and the upper end face of the piezoelectric ceramic sheet is convex upwards in an arc shape; the longitudinal section thickness at the middle position of the piezoelectric ceramic sheet is greater than the longitudinal section thickness at the edge position of the piezoelectric ceramic sheet.

[0012] In one embodiment, a retaining member is further included, which is connected to the lower end of the corrosion-resistant component and is disposed around the outer peripheral edge of the lower end of the corrosion-resistant component, wherein the retaining member and the lower end of the corrosion-resistant component enclose a receiving cavity.

[0013] In one embodiment, along the vertical direction, the upper end face of the piezoelectric ceramic sheet is located inside the receiving cavity and is separated from the inner top wall of the receiving cavity to form a colloidal space; an overflow channel is provided between the circumferential outer wall of the piezoelectric ceramic sheet and the circumferential inner wall of the receiving cavity, and the overflow channel is connected to the colloidal space; the colloidal space is filled with the colloidal material.

[0014] In one embodiment, the width of the overflow channel is 0.1 mm to 0.5 mm in the left-right direction.

[0015] In one embodiment, the thickness of the colloid between the upper end face of the piezoelectric ceramic sheet and the inner top wall of the receiving cavity is 10 μm to 500 μm along the vertical direction.

[0016] In one embodiment, along the vertical direction, the lower end face of the piezoelectric ceramic sheet is coplanar with the lower end face of the enclosure member.

[0017] In one embodiment, the corrosion-resistant component is a quartz glass sheet, a microcrystalline glass sheet, or a borosilicate glass sheet.

[0018] The second technical problem mentioned above is solved by the following technical solution:

[0019] Gas water heaters, including the atomizers mentioned above.

[0020] The gas water heater described in this utility model has the following advantages compared with the prior art:

[0021] The upper end face of the corrosion-resistant component is convex and arc-shaped, and the vibration pressure generated by the piezoelectric ceramic sheet during operation is evenly distributed throughout the component. Compared with a flat upper end face design, this design is more impact-resistant and reduces the risk of breakage. Simultaneously, the longitudinal section thickness at the center of the component is greater than that at the edges, ensuring that the thickness variation matches the distribution of vibration energy. This allows the center of the component to withstand relatively large vibration energy impacts, reducing the risk of premature failure of the piezoelectric ceramic sheet due to a breakage at the center. Vibrations generated at the edges of the piezoelectric ceramic sheet are more easily transmitted to the corresponding location on the corrosion-resistant component, improving the transmission efficiency of vibration energy at the edges and enhancing the atomization performance of the atomizer, thereby increasing its service life and reliability. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of the atomizer provided in this embodiment of the utility model;

[0023] Figure 2 This is an exploded view of the piezoelectric ceramic sheet and corrosion-resistant component provided in this embodiment of the utility model;

[0024] Figure 3 This is a cross-sectional view of the bonding structure between the piezoelectric ceramic sheet and the corrosion-resistant component provided in this embodiment of the utility model.

[0025] The component names and labels in the diagram are as follows:

[0026] 10. Outer casing; 20. Sealing sleeve; 201. Mounting groove; 30. Ultrasonic generator;

[0027] 1. Piezoelectric ceramic sheet; 2. Corrosion-resistant parts; 21. Receiving cavity; 22. Overflow channel; 23. Lower end; 24. Upper end; 3. Colloid; 4. Enclosure. Detailed Implementation

[0028] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0029] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] In the description of this embodiment, terms such as "upper," "lower," "right," and "left" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0033] This embodiment proposes a gas water heater, which is a condensing gas water heater. The gas water heater includes a combustion device and a condensing device. The condensing device atomizes the condensate dripping from the outer wall of the heat exchange tube into water mist through an atomizer, and then discharges it along with the flue gas after heat exchange through the exhaust shell. Since gas water heaters are existing technology, the specific structure and working principle of gas water heaters will not be described in detail.

[0034] like Figure 1As shown, this embodiment also proposes an atomizer, which includes a housing 10, a sealing sleeve 20, an ultrasonic generator 30, a piezoelectric ceramic sheet 1, and a corrosion-resistant component 2. The corrosion-resistant component 2 is assembled with the piezoelectric ceramic sheet 1, and then the corrosion-resistant component 2 and the piezoelectric ceramic sheet 1 are installed in the mounting groove 201 of the sealing sleeve 20, with the piezoelectric ceramic sheet 1 facing the inside of the sealing sleeve 20. The corrosion-resistant component 2 is exposed at the opening of the mounting groove 201. The ultrasonic generator 30 is powered by an external power supply and is electrically connected to the piezoelectric ceramic sheet 1 through a wiring harness. The high-frequency electrical signal (frequency usually between 1.7MHz and 2.4MHz) generated by the ultrasonic generator 30 is transmitted to the piezoelectric ceramic sheet 1. The piezoelectric ceramic sheet 1 performs high-frequency mechanical vibration at the same frequency and transmits the high-frequency mechanical vibration to the corrosion-resistant component 2, so as to realize the atomization of condensed water through the corrosion-resistant component 2.

[0035] The sealing sleeve 20 is made of fluorosilicone to form a fluorosilicone sealing sleeve, which gives the sealing sleeve 20 strong acid resistance and extends the service life of the sealing sleeve 20. In addition, the above material also has a certain degree of flexibility, which can support the vibration of the piezoelectric ceramic sheet 1 and the anti-corrosion part 2.

[0036] In this embodiment, the anti-corrosion component 2 is a quartz glass sheet, a microcrystalline glass sheet, or a borosilicate glass sheet. These three types of glass sheets not only have acid resistance but also high temperature resistance and thermal conductivity, which facilitates the heat dissipation during vibration and protects the piezoelectric ceramic sheet 1. In other embodiments, the anti-corrosion component 2 can also be made of other anti-corrosion materials, as long as it can protect the piezoelectric ceramic sheet 1 and achieve the atomization function of the atomizer. Since the atomizer is existing technology, its specific structure and working principle will not be described in detail.

[0037] It should be noted that during the operation of the atomizer, the high-frequency vibration energy generated by the piezoelectric ceramic sheet 1 is mainly concentrated at the center position (the position through which the center line of the piezoelectric ceramic sheet 1 passes in the figure), and the vibration energy from the center position to the peripheral edge position is roughly in the form of a normal distribution. When the vibration energy of the piezoelectric ceramic sheet 1 is transmitted to the anti-corrosion component 2, it also exhibits a similar normal distribution, so that the vibration energy of the anti-corrosion component 2 is also roughly in the form of a normal distribution.

[0038] In existing atomizers, the center of the anti-corrosion component bears more vibration energy during operation. This makes the center of the anti-corrosion component prone to cracking after long-term operation. Condensate comes into direct contact with the piezoelectric ceramic plate, causing the piezoelectric ceramic plate to be in a corrosive environment and risk premature failure, thus reducing the atomizer's service life and long-term reliability.

[0039] To solve the above problems, such as Figure 2 and Figure 3As shown, along the vertical direction, the upper end 24 of the anti-corrosion component 2 convexes upward in an arc shape. The longitudinal section thickness of the middle part of the anti-corrosion component 2 is greater than that of the edge part. The upper end face of the piezoelectric ceramic sheet 1 is bonded and fixed to the lower end 23 of the anti-corrosion component 2 by adhesive 3. The upper end 24 of the anti-corrosion component 2 convexes upward in an arc shape, and the vibration pressure generated by the piezoelectric ceramic sheet 1 during operation is evenly distributed throughout the anti-corrosion component 2. Compared with the flat design of the upper end 24 of the anti-corrosion component 2, it is more impact-resistant and reduces the risk of breakage of the anti-corrosion component 2. At the same time, the longitudinal section of the middle part of the anti-corrosion component 2 (the position through which the center line of the anti-corrosion component 2 passes in the figure) is more impact-resistant. The thickness of the surface is greater than the thickness of the longitudinal section at the edge of the anti-corrosion component 2, so that the thickness variation of the anti-corrosion component 2 is adapted to the distribution of vibration energy in the anti-corrosion component 2. This allows the center of the anti-corrosion component 2 to withstand relatively large vibration energy impacts, reducing the risk of premature failure of the piezoelectric ceramic sheet 1 due to cracking at the center of the anti-corrosion component 2 and the resulting corrosive environment. The vibration generated at the edge of the piezoelectric ceramic sheet 1 is more easily transmitted to the corresponding edge of the anti-corrosion component 2, improving the transmission efficiency of vibration energy at the edge of the piezoelectric ceramic sheet 1 in the anti-corrosion component 2, improving the atomization performance of the atomizer, and thus improving the service life and reliability of the atomizer.

[0040] It should be noted that the change in the longitudinal section thickness of the anti-corrosion component 2 can be a gradual decrease from the center position to the circumferential edge position, or a constant thickness at the center position along the circumferential extension of the anti-corrosion component 2 followed by a gradual decrease towards the circumferential edge position.

[0041] In one embodiment, the longitudinal section thickness of the anti-corrosion component 2 at its center is T1, and the longitudinal section thickness at its edge is T2, then 1.1T2≤T1≤1.5T2. This setting ensures that the thickness of the anti-corrosion component 2 at its center is between 1.1 and 1.5 times the thickness of its edge, thus adapting the thickness variation of the anti-corrosion component 2 to the distribution of vibration energy within it. If 1.1T2 > T1, the thickness at the center of the anti-corrosion component 2 is too thin, making it difficult to withstand the impact of vibration energy at that location, potentially leading to premature failure at the center. Conversely, if 1.5T2 < T1, the thickness at the center of the anti-corrosion component 2 is too thick, weakening the transmission efficiency of vibration energy and reducing the atomization performance of the atomizer.

[0042] In this embodiment, along the vertical direction, the lower end 23 of the anti-corrosion component 2 is concave and arc-shaped with its end face facing upwards, while the upper end face of the piezoelectric ceramic sheet 1 is convex and arc-shaped with its end face facing upwards. The longitudinal section thickness of the piezoelectric ceramic sheet 1 at its center is greater than that at its edge. Through the above arrangement, the thickness variation of the piezoelectric ceramic sheet 1 gradually decreases from the center to the peripheral edge, making the thickness variation of the piezoelectric ceramic sheet 1 compatible with the distribution of vibration energy in the piezoelectric ceramic sheet 1. This allows the center of the piezoelectric ceramic sheet 1 to withstand relatively large vibration energy impacts, improving the service life and reliability of the atomizer.

[0043] like Figure 2 and Figure 3 As shown, it also includes a baffle 4, which is connected to the lower end 23 of the anti-corrosion component 2 and is arranged around the outer periphery of the lower end 23 of the anti-corrosion component 2. The baffle 4 and the lower end 23 of the anti-corrosion component 2 enclose and form a receiving cavity 21.

[0044] It should be noted that in this embodiment, the anti-corrosion component 2 and the enclosure component 4 are integrally formed structures. Of course, in other embodiments, the anti-corrosion component 2 and the enclosure component 4 are two independent structures, and the enclosure component 4 is fixed to the lower end 23 of the anti-corrosion component 2 by adhesive bonding.

[0045] Furthermore, along the vertical direction, the upper end face of the piezoelectric ceramic sheet 1 is located within the receiving cavity 21, and a colloidal space is formed between it and the inner top wall of the receiving cavity 21. An overflow channel 22 is provided between the circumferential outer wall of the piezoelectric ceramic sheet 1 and the circumferential inner wall of the receiving cavity 21, and the overflow channel 22 communicates with the colloidal space. The colloidal space is filled with colloidal 3. For example... Figure 3 As shown, a piezoelectric ceramic sheet 1 is installed inside a receiving cavity 21. An adhesive 3 is provided between the top of the piezoelectric ceramic sheet 1 and the inner top wall of the receiving cavity 21 to bond the piezoelectric ceramic sheet 1. By pressing the adhesive 3 within the receiving cavity 21 against the piezoelectric ceramic sheet 1, the adhesive 3 flows from areas with more adhesive 3 to areas with less adhesive 3 due to the obstruction of the circumferential inner sidewall of the receiving cavity 21. This results in the adhesive 3 being evenly distributed between the piezoelectric ceramic sheet 1 and the inner top wall of the receiving cavity 21, improving the bonding quality between the piezoelectric ceramic sheet 1 and the corrosion-resistant component 2.

[0046] It should be noted that when the piezoelectric ceramic sheet 1 is installed in the receiving cavity 21, some of the colloid 3 overflows into the overflow channel 22. By pressing the colloid 3 in the receiving cavity 21 with the piezoelectric ceramic sheet 1, the colloid 3 is evenly distributed between the piezoelectric ceramic sheet 1 and the inner top wall of the receiving cavity 21. At the same time, the excess colloid 3 is squeezed into the overflow channel 22, avoiding the formation of air bubbles between the piezoelectric ceramic sheet 1 and the inner top wall of the receiving cavity 21. This achieves a tight bond between the piezoelectric ceramic sheet 1 and the anti-corrosion component 2, allowing the heat generated by the high-frequency vibration of the piezoelectric ceramic sheet 1 to be evenly conducted to the anti-corrosion component 2, preventing excessive local temperature rise of the piezoelectric ceramic sheet 1, and improving the safety and atomization performance of the piezoelectric ceramic sheet 1.

[0047] like Figure 3 As shown, since the inner top wall of the receiving cavity 21 is parallel to the upper end face of the piezoelectric ceramic sheet 1, the colloid 3 between the top of the piezoelectric ceramic sheet 1 and the inner top wall of the receiving cavity 21 forms a uniformly thick adhesive layer. Along the vertical direction, the thickness H1 of the colloid 3 between the upper end of the piezoelectric ceramic sheet 1 and the inner top wall of the receiving cavity 21 is 10μm to 500μm. In this embodiment, the thickness H1 can be 10μm, 50μm, 100μm, 150μm, 200μm, 250μm, 300μm, 350μm, 400μm, 450μm, or 500μm, etc., so that the colloid 3 between the piezoelectric ceramic sheet 1 and the inner top wall of the receiving cavity 21 forms an adhesive layer of suitable thickness, thus balancing the bonding strength between the piezoelectric ceramic sheet 1 and the receiving cavity 21 with the efficiency of high-frequency vibration and heat conduction. If H1 is too small, it reduces the bonding strength of the piezoelectric ceramic sheet 1, which can easily cause the piezoelectric ceramic sheet 1 to separate from the anti-corrosion part 2, thus reducing the stability and reliability of the atomizer. If H1 is too large, that is, the adhesive layer between the piezoelectric ceramic sheet 1 and the inner top wall of the receiving cavity 21 is too thick, it will weaken the high-frequency vibration and heat conduction efficiency of the piezoelectric ceramic sheet 1, thus weakening the atomization function of the atomizer.

[0048] like Figure 3 As shown, the width H2 of the overflow channel 22 along the left-right direction is 0.1mm to 0.5mm. In this embodiment, the width H2 can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, or 0.5mm, etc. If H2 is too small, the width of the overflow channel 22 will be too narrow, which will easily lead to poor overflow of the colloid 3, increasing the difficulty of bonding the piezoelectric ceramic sheet 1; if H2 is too large, the width of the overflow channel 22 will be too wide, causing the piezoelectric ceramic sheet 1 to easily shift in position within the receiving cavity 21, reducing the installation accuracy of the piezoelectric ceramic sheet 1.

[0049] It should be noted that, along the vertical direction, the lower end face of the piezoelectric ceramic sheet 1 is coplanar with the lower end face of the retaining member 25. When the lower end face of the piezoelectric ceramic sheet 1 is coplanar with the lower end face of the retaining member 25, the piezoelectric ceramic sheet 1 is bonded in place. At this time, the adhesive 3 between the piezoelectric ceramic sheet 1 and the inner top wall of the receiving cavity 21 forms a uniform adhesive layer, ensuring that there are no gaps between the piezoelectric ceramic sheet 1 and the inner top wall of the receiving cavity 21. Simultaneously, the piezoelectric ceramic sheet 1 squeezes out any air bubbles that may exist within the adhesive layer, allowing the heat generated by the high-frequency vibration of the piezoelectric ceramic sheet 1 to be evenly conducted to the anti-corrosion member 2.

[0050] For ease of understanding, the bonding process between the piezoelectric ceramic sheet 1 and the anti-corrosion component 2 is as follows: First, apply an appropriate amount of adhesive to the inner top wall of the receiving cavity 21, then place the piezoelectric ceramic sheet 1 into the receiving cavity 21. Using a tooling fixture, the top ends of the anti-corrosion component 2 and the piezoelectric ceramic sheet 1 are pressed together. When the lower end of the piezoelectric ceramic sheet 1 is coplanar with the lower end of the retaining component 25, the pressing of the piezoelectric ceramic sheet 1 is stopped. At this point, excess adhesive is squeezed into the overflow channel 22. After appropriate pressure holding and curing, the bonding process between the anti-corrosion component 2 and the piezoelectric ceramic sheet 1 is completed. This bonding process effectively ensures a tight bond between the anti-corrosion component 2 and the piezoelectric ceramic sheet 1, effectively improving the reliability of the atomizer's atomization. The aforementioned tooling fixture is an assembly device for the piezoelectric ceramic sheet 1 and the anti-corrosion component 2; the structure and working process of the assembly device will not be detailed further.

[0051] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An atomizer, characterized in that, It includes a piezoelectric ceramic sheet (1) and an anti-corrosion component (2). Along the vertical direction, the upper end (24) of the anti-corrosion component (2) is raised in an arc shape. The longitudinal section thickness of the middle part of the anti-corrosion component (2) is greater than the longitudinal section thickness of the edge part of the anti-corrosion component (2). The upper end face of the piezoelectric ceramic sheet (1) is bonded and fixed to the lower end (23) of the anti-corrosion component (2) by an adhesive (3).

2. The atomizer according to claim 1, characterized in that, The thickness of the longitudinal section at the middle position of the anti-corrosion component (2) is T1, and the thickness of the longitudinal section at the edge position of the anti-corrosion component (2) is T2. Then, 1.1T2≤T1≤1.5T2.

3. The atomizer according to claim 1, characterized in that, Along the vertical direction, the lower end (23) of the anti-corrosion component (2) is concave and arc-shaped with the end face facing upward; the upper end of the piezoelectric ceramic sheet (1) is convex and arc-shaped with the end face facing upward; the longitudinal section thickness of the middle position of the piezoelectric ceramic sheet (1) is greater than the longitudinal section thickness of the edge position of the piezoelectric ceramic sheet (1).

4. The atomizer according to claim 1, characterized in that, It also includes a enclosure (4), which is connected to the lower end (23) of the anti-corrosion component (2) and is arranged around the outer periphery of the lower end (23) of the anti-corrosion component (2). The enclosure (4) and the lower end (23) of the anti-corrosion component (2) enclose to form a receiving cavity (21).

5. The atomizer according to claim 4, characterized in that, Along the vertical direction, the upper end face of the piezoelectric ceramic sheet (1) is located inside the receiving cavity (21) and is separated from the inner top wall of the receiving cavity (21) to form a colloidal space; an overflow channel (22) is provided between the circumferential outer wall of the piezoelectric ceramic sheet (1) and the circumferential inner wall of the receiving cavity (21), and the overflow channel (22) is connected to the colloidal space; the colloidal space is filled with the colloidal material (3).

6. The atomizer according to claim 5, characterized in that, Along the left-right direction, the width of the overflow channel (22) is 0.1mm to 0.5mm.

7. The atomizer according to claim 4, characterized in that, Along the vertical direction, the thickness of the colloid (3) between the upper end face of the piezoelectric ceramic sheet (1) and the inner top wall of the receiving cavity (21) is 10 μm to 500 μm.

8. The atomizer according to claim 4, characterized in that, Along the vertical direction, the lower end face of the piezoelectric ceramic sheet (1) is coplanar with the lower end face of the enclosure member (4).

9. The atomizer according to any one of claims 1 to 7, characterized in that, The corrosion-resistant component (2) is a quartz glass sheet, a microcrystalline glass sheet, or a borosilicate glass sheet.

10. A gas-fired water heater, characterized in that, The atomizer included in any one of claims 1 to 9.

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