Piezoelectric atomization valve

Abstract

The invention relates to the technical field of atomization valves, and discloses a piezoelectric atomization valve which comprises a valve body, a valve rod and a control device. The piezoelectric ceramic is mounted in the inner cavity of the valve body and is used for piezoelectric driving; the lever amplification mechanism is installed in the inner cavity of the valve body, and one end of the lever amplification mechanism is located at the bottom of the working end of the piezoelectric ceramic; the linkage mechanism is used for transmitting the driving force of the lever amplifying mechanism, the linkage mechanism comprises a firing pin, and the firing pin is located at the bottom of the lever amplifying mechanism and used for transmitting power of the lever amplifying mechanism; and the nozzle mechanism is mounted at the bottom of the linkage mechanism and is used for spraying. According to the invention, the lever amplification mechanism is matched to mechanically amplify infinitesimal displacement, and the firing pin is driven to realize accurate glue extrusion control; and meanwhile, atomized gas is introduced to instantly crush the extruded glue solution into uniformly distributed tiny liquid drops, so that the advantage of accurate output of small glue amount of the piezoelectric valve is kept.

Description

Technical Field

[0001] This invention relates to the field of atomizing valve technology, specifically to piezoelectric atomizing valves. Background Technology

[0002] In the field of dispensing technology, piezoelectric valves and spray valves are commonly used precision coating equipment. Piezoelectric valves typically utilize the micro-displacement drive mechanism of piezoelectric ceramics to spray a very small volume of liquid through micro-holes onto the workpiece surface, achieving precise dispensing of small amounts of adhesive.

[0003] The applicant discovered during the implementation of the prior art that the droplets formed by the above-mentioned methods are relatively concentrated, making it difficult to form a uniform wide coverage on the coating surface, thus limiting its use in application scenarios requiring thin-layer uniform coating. While the spray valve disperses the droplets into a mist through atomized gas, allowing them to be evenly distributed on the workpiece surface and thus achieving a certain width of coverage, when the droplet volume is too small, the spray valve has poor stability in controlling the amount of adhesive, which can easily lead to problems such as uneven coating and large fluctuations in adhesive amount, making it difficult to meet the precision application requirements with high coating thickness and consistency. Based on this, the present invention designs a piezoelectric atomizing valve to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a piezoelectric atomizing valve that solves the problems of limited application scenarios and poor stability in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A piezoelectric atomizing valve, comprising: The valve body is used for piezoelectric atomization operation; Piezoelectric ceramics are installed inside the valve body for piezoelectric actuation; The lever amplification mechanism is installed in the inner cavity of the valve body, and one end of the lever amplification mechanism is located at the bottom of the working end of the piezoelectric ceramic. A linkage mechanism is used to transmit the driving force of the lever amplification mechanism. The linkage mechanism includes a striker, which is located at the bottom of the lever amplification mechanism and is used for the power transmission of the lever amplification mechanism. The nozzle mechanism is installed at the bottom of the linkage mechanism and is used for spraying.

[0006] Preferably, a valve body cover is installed on the front of the valve body, and a Remer connector is installed on the top of the valve body. The Remer connector is fixedly connected to the valve body by an external threaded sleeve.

[0007] Preferably, a front swing head is installed at the bottom of the piezoelectric ceramic for working in conjunction with the lever amplification mechanism, and a rear guide ball is installed at the top of the piezoelectric ceramic.

[0008] Preferably, the lever amplification mechanism includes a fixed sleeve installed in the inner cavity of the valve body, a cylindrical pin rotatably connected to the inner cavity of the fixed sleeve, and an amplification arm installed on the outer ring of the cylindrical pin.

[0009] The piezoelectric atomizing valve operates based on the micro-displacement driving characteristics of piezoelectric ceramics. When the piezoelectric ceramic receives an external driving voltage signal, it generates a micro-axial displacement according to the piezoelectric effect. This displacement is transmitted to the lever amplification mechanism through the front swing head. The lever amplification mechanism consists of a fixed sleeve, a cylindrical pin, and an amplifying arm. The cylindrical pin acts as a fulcrum, and the amplifying arm mechanically amplifies the input displacement of the piezoelectric ceramic. The amplified displacement drives the striker in the linkage mechanism to move downward. The striker strikes the inside of the nozzle body of the nozzle mechanism, causing a small amount of liquid accumulated between the striker and the nozzle body to be squeezed out. Simultaneously, atomizing gas is introduced through the first air pipe connector on the front of the valve body and the second air pipe connector on the side of the mounting bracket. At the nozzle body outlet, the gas interacts with the squeezed liquid, breaking the liquid into tiny droplets and forming a uniform mist, thereby achieving a wide-area thin-layer coating.

[0010] Preferably, the linkage mechanism further includes a spring seat installed in the inner cavity of the valve body, a return spring is installed on the outer ring of the striker and the bottom of the return spring is fixedly connected to the top of the spring seat, the bottom of the striker penetrates through the bottom of the valve body and extends to the outside of the valve body, and a hot glue mechanism is also installed on one side of the valve body.

[0011] Preferably, the hot glue mechanism includes a hot glue channel installed on one side of the valve body, a glue tank installed on the top of the hot glue channel, a liquid level sensor installed on the front of the glue tank, and a glue inlet set screw installed on one side of the hot glue channel.

[0012] Preferably, the nozzle mechanism includes a mounting bracket installed at the bottom of the valve body, a nozzle body is mounted on one side of the mounting bracket, a retaining ring is installed between the nozzle body and the valve body, and the bottom of the firing pin extends into the inner cavity of the nozzle body.

[0013] Preferably, a first air pipe connector is installed on the front of the valve body, a second air pipe connector is installed on one side of the mounting bracket, a mounting plate is installed on one side of the valve body, and a pressure block is installed on one side of the mounting plate.

[0014] The linkage mechanism includes a spring seat and a return spring. When the striking pin is driven downward by the lever amplification mechanism, the return spring is compressed. When the piezoelectric ceramic returns to its original position, the return spring releases its elastic potential energy, pushing the striking pin back to its initial position quickly, achieving high-speed reciprocating motion and ensuring timely extrusion and cutting of the adhesive. The hot glue mechanism is connected to the valve body through a hot glue channel. The adhesive in the glue tank is heated and flows into the hot glue channel, and the glue feed rate is adjusted by the glue feed set screw. The liquid level sensor monitors the remaining adhesive in the glue tank in real time to prevent insufficient or excessive glue. The nozzle mechanism is fixed to the bottom of the valve body by a mounting bracket and a fixing ring. The bottom of the striking pin extends into the inner cavity of the nozzle body. When the striking pin strikes, the hot glue is precisely extruded and atomized by atomizing gas to form a uniform thin mist coating.

[0015] Preferably, the output displacement ΔL of the piezoelectric ceramic under the action of the driving voltage V satisfies the following relationship: ; Where d is the longitudinal piezoelectric constant of the piezoelectric ceramic, L is the original length of the piezoelectric ceramic, and A is the cross-sectional area of ​​the piezoelectric ceramic. This displacement is amplified by the lever amplification mechanism and used to precisely control the stroke of the striker.

[0016] Preferably, the Sottle mean diameter D of the atomized droplets generated by the nozzle mechanism is related to the Weber number, wherein the Weber number We is calculated using the following formula: ; ρ is the density of the atomized gas, v is the gas velocity, n is the nozzle orifice diameter, and σ is the surface tension of the liquid.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are: 1. This invention addresses the dual technical challenges of concentrated droplets and limited coverage in traditional piezoelectric valves and unstable adhesive volume control in spray valves. By using precise micro-displacement drive of piezoelectric ceramics, combined with a lever amplification mechanism, the minute displacement is mechanically amplified to drive the ejector pin and achieve precise adhesive extrusion control. Simultaneously, atomizing gas is introduced to instantly break the extruded adhesive into uniformly distributed micro-droplets. This maintains the advantage of precise small-volume output of piezoelectric valves while also possessing the wide coverage characteristics of spray valves, forming a thin coating with uniform thickness and consistent distribution on the workpiece surface, effectively improving coating quality and product consistency.

[0018] 2. This invention significantly improves the stability and reliability of adhesive output in the form of tiny droplets through the use of mechanism design and control methods. By utilizing the rapid response characteristics of the piezoelectric drive system and combining it with the timely reset function of the return spring, it achieves precise control and rapid cutting of adhesive extrusion during high-speed dispensing, ensuring that the consistency and stability of adhesive output can still be maintained under high-speed working conditions. At the same time, the constant temperature control of the hot glue mechanism ensures the stability of adhesive flow and further eliminates the phenomenon of uneven coating caused by changes in adhesive viscosity.

[0019] 3. This invention, by optimizing the collaborative working parameters of the piezoelectric drive and atomization system, achieves full-process control from precise output of nano-level adhesive liquid to uniform atomization distribution. It can not only meet the stringent requirements of conformal coating for ultra-thin and uniform coatings, but also be applied to various precision coating scenarios such as automotive parts lubricant coating and biomedical device packaging, providing a coating solution with high precision, high stability and wide applicability for various industries. Attached Figure Description

[0020] Figure 1 This is a front-view stereoscopic structural diagram of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the valve body and its external structure according to the present invention; Figure 4 This is a schematic diagram of the bottom structure of the valve body of the present invention; Figure 5 This is a schematic diagram of the internal structure of the valve body of the present invention; Figure 6 This is a partial cross-sectional view of the valve body of the present invention; Figure 7 This is a partial structural schematic diagram of the lever amplification mechanism of the present invention.

[0021] The components include: 2. Lever amplification mechanism; 3. Linkage mechanism; 4. Nozzle mechanism; 5. Hot glue mechanism; 101. Valve body; 102. Piezoelectric ceramic; 103. Valve body cover; 104. Remer connector; 105. External threaded sleeve; 106. Front swing head; 107. Rear guide ball; 108. First air pipe connector; 109. Second air pipe connector; 110. Mounting plate; 111. Pressure block; 201. Fixing sleeve; 202. Cylindrical pin; 203. Amplification arm; 301. Impact pin; 302. Spring seat; 303. Return spring; 401. Mounting bracket; 402. Nozzle body; 403. Fixing ring; 501. Hot glue channel; 502. Glue bucket; 503. Liquid level sensor; 504. Glue inlet set screw. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1: Please refer to Figures 1-7 In this embodiment of the invention, a piezoelectric atomizing valve includes: a valve body 101 for performing piezoelectric atomization; a piezoelectric ceramic 102 installed in the inner cavity of the valve body 101 for piezoelectric actuation; a lever amplification mechanism 2 installed in the inner cavity of the valve body 101, with one end of the lever amplification mechanism 2 located at the bottom of the working end of the piezoelectric ceramic 102; a linkage mechanism 3 for transmitting the driving force of the lever amplification mechanism 2, the linkage mechanism 3 including a striker 301 located at the bottom of the lever amplification mechanism 2 and used for power transmission of the lever amplification mechanism 2; and a nozzle mechanism 4 installed at the bottom of the linkage mechanism 3 for spraying.

[0024] A valve body cover 103 is mounted on the front of the valve body 101, and a Remer connector 104 is mounted on the top of the valve body 101. The Remer connector 104 is fixedly connected to the valve body 101 by an external threaded sleeve 105. A front swing head 106 is mounted on the bottom of the piezoelectric ceramic 102 for working in conjunction with the lever amplification mechanism 2, and a rear guide ball 107 is mounted on the top of the piezoelectric ceramic 102. The lever amplification mechanism 2 includes a fixed sleeve 201 installed in the inner cavity of the valve body 101. A cylindrical pin 202 is rotatably connected in the inner cavity of the fixed sleeve 201, and an amplification arm 203 is mounted on the outer ring of the cylindrical pin 202.

[0025] The piezoelectric atomizing valve operates based on the micro-displacement driving characteristics of the piezoelectric ceramic 102. When the piezoelectric ceramic 102 receives an external driving voltage signal, it generates an axial micro-displacement according to the piezoelectric effect. This displacement is transmitted to the lever amplification mechanism 2 through the front swing head 106. The lever amplification mechanism 2 consists of a fixed sleeve 201, a cylindrical pin 202, and an amplifying arm 203. The cylindrical pin 202 serves as a fulcrum, and the amplifying arm 203 mechanically amplifies the input displacement of the piezoelectric ceramic 102. The amplified displacement drives the impact pin 301 in the linkage mechanism 3 to move downward. The impact pin 301 strikes the inside of the nozzle body 402 of the nozzle mechanism 4, causing a small amount of liquid accumulated between the impact pin 301 and the nozzle body 402 to be squeezed out. At the same time, atomizing gas is introduced through the first air pipe connector 108 on the front of the valve body 101 and the second air pipe connector 109 on the side of the mounting bracket 401. At the outlet of the nozzle body 402, the gas interacts with the squeezed liquid, breaking the liquid into tiny droplets and forming a uniform mist, thereby achieving a wide-area thin-layer coating. Throughout the process, the displacement accuracy of the piezoelectric ceramic 102 and the amplification effect of the lever amplification mechanism 2 ensured the stability and accuracy of the adhesive volume control.

[0026] Example 2: Please refer to Figures 1-7 In this embodiment of the invention, the linkage mechanism 3 further includes a spring seat 302 installed in the inner cavity of the valve body 101. A return spring 303 is installed on the outer ring of the striker 301, and the bottom of the return spring 303 is fixedly connected to the top of the spring seat 302. The bottom of the striker 301 penetrates the bottom of the valve body 101 and extends to the outside of the valve body 101. A hot glue mechanism 5 is also installed on one side of the valve body 101. The hot glue mechanism 5 includes a hot glue channel 501 installed on one side of the valve body 101. A glue tank 502 is installed on the top of the hot glue channel 501. A liquid level sensor 503 is installed on the front of the glue tank 502. A glue inlet set screw 504 is also installed on one side of the hot glue channel 501.

[0027] The nozzle mechanism 4 includes a mounting bracket 401 installed at the bottom of the valve body 101. A nozzle body 402 is mounted on one side of the mounting bracket 401. A retaining ring 403 is installed between the nozzle body 402 and the valve body 101. The bottom of the firing pin 301 extends into the inner cavity of the nozzle body 402. A first air pipe connector 108 is mounted on the front of the valve body 101. A second air pipe connector 109 is also mounted on one side of the mounting bracket 401. A mounting plate 110 is also mounted on one side of the valve body 101. A pressure block 111 is mounted on one side of the mounting plate 110.

[0028] The linkage mechanism 3 includes a spring seat 302 and a return spring 303. When the impact pin 301 is driven downward by the lever amplification mechanism 2, the return spring 303 is compressed. When the piezoelectric ceramic 102 resets, the return spring 303 releases its elastic potential energy, pushing the impact pin 301 back to its initial position quickly, achieving high-speed reciprocating motion and ensuring timely extrusion and cutting of the adhesive. The hot glue mechanism 5 is connected to the valve body 101 through the hot glue channel 501. The adhesive in the glue tank 502 is heated and flows into the hot glue channel 501, and the amount of adhesive fed is adjusted by the glue feeding set screw 504. The liquid level sensor 503 monitors the remaining amount of adhesive in the glue tank 502 in real time to prevent insufficient or overflowing adhesive. The nozzle mechanism 4 is fixed to the bottom of the valve body 101 by the mounting bracket 401 and the fixing ring 403. The bottom of the impact pin 301 extends into the inner cavity of the nozzle body 402. When the impact pin 301 strikes, the hot glue is precisely extruded and atomized by the atomizing gas to form a uniform thin mist coating. This embodiment improves stability and consistency in high-speed dispensing and ultra-thin coating scenarios by maintaining the fluidity of the adhesive with hot glue and the rapid response of the return spring 303.

[0029] The output displacement ΔL of the piezoelectric ceramic 102 under the action of driving voltage V satisfies the following relationship: ; Where d is the longitudinal piezoelectric constant of piezoelectric ceramic 102, L is the original length of piezoelectric ceramic 102, and A is the cross-sectional area of ​​piezoelectric ceramic 102. This displacement is amplified by lever amplification mechanism 2 and used to precisely control the stroke of striker 301.

[0030] The Sottle mean diameter D of the atomized droplets produced by nozzle mechanism 4 is related to the Weber number, where the Weber number We is calculated using the following formula: ; ρ is the density of the atomized gas, v is the gas velocity, n is the nozzle orifice diameter, and σ is the surface tension of the liquid.

[0031] The output displacement ΔL of the piezoelectric ceramic 102 under the driving voltage V is determined by a formula, where d is the longitudinal piezoelectric constant of the piezoelectric ceramic 102, L is the original length, and A is the cross-sectional area. This micro-displacement is amplified by the lever amplification mechanism 2 to precisely control the stroke of the impact pin 301, thereby adjusting the volume of the extruded adhesive and achieving stable output of small amounts of adhesive. The size of the atomized droplets generated by the nozzle mechanism 4 is related to the Weber number We, where ρ is the atomized gas density, v is the gas velocity, n is the nozzle orifice diameter, and σ is the liquid surface tension. By adjusting the gas velocity v and the nozzle orifice diameter n, the Sottle mean diameter D of the atomized droplets can be controlled, ensuring that the droplets are small and uniformly distributed, forming an extremely thin liquid film.

[0032] Example 3: Please refer to Figures 1-7This invention provides a specific embodiment of a piezoelectric atomizing valve for conformal coating of automotive electronic circuit boards. The piezoelectric atomizing valve includes a valve body 101, a piezoelectric ceramic 102, a lever amplification mechanism 2, a linkage mechanism 3, a nozzle mechanism 4, and a hot glue mechanism 5.

[0033] The piezoelectric ceramic 102 uses a piezoelectric ceramic element of model PSt 150 / 5×5 / 20, with a longitudinal piezoelectric constant of 400×10⁻⁶. -12 The piezoelectric ceramic 102 has a per-meter voltage, an original length of 20 mm, and a cross-sectional area of ​​25 square millimeters. When a driving voltage of 30 volts is applied, the piezoelectric ceramic 102 produces a theoretical displacement of 2.4 micrometers.

[0034] The lever amplification mechanism 2 uses a 5:1 amplification ratio to amplify the input displacement of the piezoelectric ceramic 102 to 12 micrometers. The striking pin 301 in the linkage mechanism 3 has a diameter of 0.8 mm and is made of hard alloy. The return spring 303 has a spring constant of 0.8 N / mm and a preload of 0.5 mm. The nozzle body 402 of the nozzle mechanism 4 has an orifice diameter of 100 micrometers.

[0035] The hot glue mechanism 5 includes a hot glue channel 501, a glue tank 502, a liquid level sensor 503, and a glue inlet set screw 504. During operation, the hot glue mechanism 5 is first turned on to heat the conformal coating to 40 degrees Celsius and maintain a constant temperature; at this temperature, the viscosity of the conformal coating is 200 centipoise. The liquid level sensor 503 monitors the liquid level in the glue tank 502 in real time.

[0036] The atomizing gas is dry, clean compressed air, which is connected to the system through the first air connector 108 and the second air connector 109. The gas pressure is set to 0.3 MPa, and the gas flow rate is approximately 15 meters per second.

[0037] When a dispensing trigger signal is received, the control system applies a pulse voltage to the piezoelectric ceramic 102. The piezoelectric ceramic 102 is displaced and amplified by the lever amplification mechanism 2, driving the impact pin 301 to move downward. The impact pin 301 strikes the nozzle body 402 at a frequency of 200 times per second, dispensing approximately 15 nanoliters of conformal paint droplets with each strike.

[0038] Simultaneously, atomizing gas enters the annular gap around the nozzle from the first air connector 108 and the second air connector 109, forming a high-speed airflow at the nozzle outlet. The discharged conformal coating droplets are fully atomized under conditions of approximately 150 Weber number, forming uniform droplets with an average Sottle diameter of approximately 25 micrometers. These droplets are sprayed onto the circuit board surface in a fan-shaped mist field, forming a uniform coating with a thickness of 8-12 micrometers and a coverage width of up to 5 millimeters.

[0039] Working Principle: The piezoelectric atomizing valve operates based on the micro-displacement driving characteristics of the piezoelectric ceramic 102. When the piezoelectric ceramic 102 receives an external driving voltage signal, it generates a micro-axial displacement according to the piezoelectric effect. This displacement is transmitted to the lever amplification mechanism 2 through the front swing head 106. The lever amplification mechanism 2 consists of a fixed sleeve 201, a cylindrical pin 202, and an amplifying arm 203. The cylindrical pin 202 serves as a fulcrum, and the amplifying arm 203 mechanically amplifies the input displacement of the piezoelectric ceramic 102. The amplified displacement drives the impact pin 301 in the linkage mechanism 3 to move downward. The impact pin 301 strikes the inside of the nozzle body 402 of the nozzle mechanism 4, causing the small amount of liquid accumulated between the impact pin 301 and the nozzle body 402 to be squeezed out.

[0040] Atomizing gas is introduced through the first gas connector 108 on the front of the valve body 101 and the second gas connector 109 on the side of the mounting bracket 401. At the outlet of the nozzle body 402, it interacts with the extruded liquid, breaking it into tiny droplets and forming a uniform mist, thus achieving a wide-area thin-layer coating. Throughout the process, the displacement accuracy of the piezoelectric ceramic 102 and the amplification effect of the lever amplification mechanism 2 ensure the stability and accuracy of the adhesive volume control.

[0041] The hot glue mechanism 5 is connected to the valve body 101 via the hot glue channel 501. The glue liquid in the glue tank 502 is heated and flows into the hot glue channel 501, and the glue injection rate is adjusted by the glue injection set screw 504. The liquid level sensor 503 monitors the remaining glue liquid in the glue tank 502 in real time to prevent glue shortage or overflow. The nozzle mechanism 4 is fixed to the bottom of the valve body 101 by the mounting bracket 401 and the fixing ring 403. The bottom of the impact pin 301 extends into the inner cavity of the nozzle body 402. When the impact pin 301 strikes, the hot glue liquid is precisely squeezed out and atomized by the atomizing gas to form a uniform thin mist coating.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A piezoelectric atomizing valve, characterized in that, include: Valve body (101) is used for piezoelectric atomization operation; A piezoelectric ceramic (102) is installed in the inner cavity of the valve body (101) for piezoelectric actuation; The lever amplification mechanism (2) is installed in the inner cavity of the valve body (101), and one end of the lever amplification mechanism (2) is located at the bottom of the working end of the piezoelectric ceramic (102); Linkage mechanism (3) is used to transmit the driving force of lever amplification mechanism (2). The linkage mechanism (3) includes a striker (301), which is located at the bottom of lever amplification mechanism (2) and is used for power transmission of lever amplification mechanism (2). Nozzle mechanism (4), which is installed at the bottom of linkage mechanism (3) for spraying.

2. The piezoelectric atomizing valve according to claim 1, characterized in that: A valve body cover (103) is installed on the front of the valve body (101), and a Remer connector (104) is installed on the top of the valve body (101). The Remer connector (104) is fixedly connected to the valve body (101) by an external threaded sleeve (105).

3. The piezoelectric atomizing valve according to claim 1, characterized in that: The bottom of the piezoelectric ceramic (102) is equipped with a front swing head (106) for working in conjunction with the lever amplification mechanism (2), and the top of the piezoelectric ceramic (102) is equipped with a rear guide ball (107).

4. The piezoelectric atomizing valve according to claim 1, characterized in that: The lever amplification mechanism (2) includes a fixed sleeve (201) installed in the inner cavity of the valve body (101), a cylindrical pin (202) is rotatably connected in the inner cavity of the fixed sleeve (201), and an amplification arm (203) is installed on the outer ring of the cylindrical pin (202).

5. A piezoelectric atomizing valve according to claim 1, characterized in that: The linkage mechanism (3) also includes a spring seat (302) installed in the inner cavity of the valve body (101). A return spring (303) is installed on the outer ring of the striker (301), and the bottom of the return spring (303) is fixedly connected to the top of the spring seat (302). The bottom of the striker (301) penetrates the bottom of the valve body (101) and extends to the outside of the valve body (101). A hot glue mechanism (5) is also installed on one side of the valve body (101).

6. A piezoelectric atomizing valve according to claim 5, characterized in that: The hot glue mechanism (5) includes a hot glue channel (501) installed on one side of the valve body (101), a glue tank (502) installed on the top of the hot glue channel (501), a liquid level sensor (503) installed on the front of the glue tank (502), and a glue inlet set screw (504) installed on one side of the hot glue channel (501).

7. A piezoelectric atomizing valve according to claim 5, characterized in that: The nozzle mechanism (4) includes a mounting bracket (401) installed at the bottom of the valve body (101), a nozzle body (402) is installed on one side of the mounting bracket (401), a retaining ring (403) is installed between the nozzle body (402) and the valve body (101), and the bottom of the firing pin (301) extends into the inner cavity of the nozzle body (402).

8. A piezoelectric atomizing valve according to claim 7, characterized in that: A first air pipe connector (108) is installed on the front of the valve body (101), a second air pipe connector (109) is installed on one side of the mounting bracket (401), a mounting plate (110) is installed on one side of the valve body (101), and a pressure block (111) is installed on one side of the mounting plate (110).

9. A piezoelectric atomizing valve according to claim 1, characterized in that: The output displacement ΔL of the piezoelectric ceramic (102) under the action of driving voltage V satisfies the following relationship: ; Where d is the longitudinal piezoelectric constant of the piezoelectric ceramic (102), L is the original length of the piezoelectric ceramic (102), and A is the cross-sectional area of ​​the piezoelectric ceramic (102). This displacement is amplified by the lever amplification mechanism (2) and used to precisely control the stroke of the striker (301).

10. A piezoelectric atomizing valve according to claim 1, characterized in that: The Sottle mean diameter D of the atomized droplets produced by the nozzle mechanism (4) is related to the Weber number, where the Weber number We is calculated as follows: ; ρ is the density of the atomized gas, v is the gas velocity, n is the nozzle orifice diameter, and σ is the surface tension of the liquid.

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