CN203494705U

CN203494705U - Ultrasonic spraying device for atomizing viscous liquid and suspension

Info

Publication number: CN203494705U
Application number: CN201320531337.6U
Authority: CN
Inventors: 咸威
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-08-29
Filing date: 2013-08-29
Publication date: 2014-03-26
Anticipated expiration: 2023-08-29

Abstract

The utility model relates to an ultrasonic spraying device for atomizing a viscous liquid and a suspension. The ultrasonic spraying device comprises a rear seat, a transducer, a transducer rear end, a piezoelectric transducer group, an electrode soldering lug, a transducer front end, a shell, an electrical port, a liquid inlet port and an air inlet port. When the device works, the liquid flows through the liquid inlet port, and flows to an atomizing end face through a straight-through hole in the transducer to be atomized. The spraying device utilizes an ultrasonic horn and an acoustic surface wave atomization principle, and the amplitude of ultrasonic waves emitted by the ultrasonic transducer is increased by the ultrasonic horn, so that the liquid or solid particle suspension with higher viscosity can be atomized, the efficiency of the spraying device is improved, and the electric power of 1W for atomizing pure water can provide the atomized amount of more than 1L/h. The ultrasonic spraying device has an ultrasonic resonant frequency between 20kHz and 300kHz.

Description

Ultrasonic spraying device for atomization thick liquid and suspension

Technical field

The utility model relates to a kind of liquid dispensing apparatus, particularly relates to a kind of ultrasonic spraying device of or the suspension that contains small solid particle higher for atomization viscosity, belongs to ultrasonic atomization field.

Background technology

The atomization of liquid is to make it to disperse to tear or apply by liquid being applied to mechanical energy the process that heat energy makes it to be vaporized into fine particle.The atomising device conversion efficiency of mode of heating is generally on the low side, and it is not suitable for using medical treatment or the chemical field that can not be heated at some atomized liquid.

Since 20 century 70s, ultrasonic fog is turned to a kind of novel atomization of liquid technology and is widely used in the every field such as medical treatment, civilian, industrial, scientific research.Ultrasonic atomization is to utilize the higher-order of oscillation that ultrasonic transducer sends to tear into small particle in the liquid of transducer face.This ultrasonic transducer consists of a piezoelectric ceramic wafer conventionally, by loading the electronic impulse identical with piezoelectric ceramics resonant frequency, drives ultrasonic transducer to vibrate.This kind of common frequency of supersonic atomizer is higher, between 1MHz to 3MHz, and because simple its operating efficiency of vibration of piezoelectric chip that relies on is lower, the electrical power that conventionally will load more than 10W just can be by pure water atomization, and the electrical power of 20W only can provide the pure water atomization quantity of 300ml/h.In addition, the viscosity of atomized liquid is very restricted, conventionally can not surpass 1.2cps, so this kind of supersonic atomizer is only suitable in atomized water, alcohol or similar solution.And in unloaded (no liquid), inefficient higher-order of oscillation transducer can be warming up to more than 200 ℃ moment, cause transducer to burn, so this kind of supersonic atomizer must completely be immersed in liquid and work, thereby make this atomising device conventionally need a tank and atomization from bottom to up, only have by applying certain water conservancy diversion gas and liquid mist could be blown into other directions, this defect also allows this kind of atomising device be very limited in many practical applications.

At the beginning of late 1990s, 21 century, a kind of ultrasonic atomization technique that utilizes micropore metal sheet and piezoelectric chip to combine starts to be employed.This technology utilizes etching or laser to process many very thin micropores in a foil (being generally nickel alloy, stainless steel or titanium alloy) central area, aperture is generally at several microns to tens microns, quantity is not several thousand to several ten thousand etc., then ring piezoelectric potsherd is bonded on micropore metal sheet, radial vibration by ring piezoelectric potsherd drives the thickness direction of micropore metal sheet central area to vibrate, liquid is torn atomization while flowing through micropore metal sheet central area, the particle of atomization is ejected at the opposite side of sheet metal through micropore.Because this atomising device has used the radial frequency of piezoelectric ceramic piece, supersonic frequency is generally between 100kHz to 200kHz.This supersonic atomizer is due to the lever principle of utilizing, make the more single piezoelectric ceramic piece of amplitude at micropore metal sheet center have large increase, and the efficiency of whole atomising device also improves greatly, the general driving voltage that only needs 3V to 5V, the power of 0.5W-1W just can be by pure water atomization.And this atomising device do not need to soak in water completely, it realizes the atomization to any direction substantially, and does not need water storage device.Because this kind of supersonic atomizer has compact small and exquisite and lower powered advantage, it is widely used in the fields such as Portable atomizer, humidifier, fumigating machine.But due to the easy reason such as obstruction of the metal fatigue of micropore metal sheet, micropore, stability and the life-span of this supersonic atomizer are lower, and owing to can not loading larger power, the atomization quantity of this atomising device is generally less, are no more than 100ml/h.Although and having utilized lever principle, the amplitude of sheet metal is still limited, and the too small very easily obstruction of micropore, makes this kind of atomizer the same with traditional high frequency piezoelectric ceramic sheet atomizer, cannot the higher liquid of atomization viscosity.

Due to existing supersonic atomizer all cannot atomization viscosity the higher or liquid that contains solid impurity, and atomization quantity is lower, makes the ultrasonic atomization conventionally can only be for fields such as air wetting, champignon beauty treatments.For fields such as the spraying of special liquid material, chemical industry manufacture, chemical analyses, ultrasonic atomization technique is difficult to be employed always.

Summary of the invention

The utility model proposes in view of this problem, its objective is a kind of ultrasonic spraying device that utilizes ultrasonic variable amplitude bar and surface acoustic wave atomizing principles is provided, by ultrasonic variable amplitude bar, increase hyperacoustic amplitude that ultrasonic transducer sends, the liquid or solid particle suspension liquid that viscosity is larger can be atomized, and by applying the Compressed Gas of particular orientation, liquid mist evenly be sprayed.

A kind of ultrasonic spraying device for atomization thick liquid and suspension described in the utility model, it comprises back seat, transducer, shell, electrical port, feed liquor port and air inlet port.It is characterized in that: the transducer of described ultrasonic spraying device is connected to the front side of back seat, jacket is connected outside transducer and with back seat front side, and the rear side of back seat connects respectively electrical port, feed liquor port and air inlet port.The inner side first half of described shell is circular cone tubular structure, and latter half is cylinder-like structure, and shell front end face centre bit is equipped with a circular hole outlet, and the atomization end of transducer front end is positioned at this circular hole exit.The ultrasonic resonator frequency of described ultrasonic spraying device is between 20kHz to 300kHz.

Described transducer comprises transducer rear end, piezoelectric vibrator group, electrode weld tabs, transducer front end, and the electrode of piezoelectric vibrator group is drawn by electrode weld tabs and is connected with electrical port;

There is a through hole described transducer front end central shaft position, and aperture is between 0.2mm to 7mm;

Described piezoelectric vibrator group is coaxially enumerated and is formed by the circular piezoelectric ceramic piece of even number, and is electrically connected to parallel way, and a piezoelectric vibrator group wherein utmost point is electrically connected to transducer front end and transducer rear end.

Described transducer front end is structurally sequentially divided into atomization end, front end bar, middle-end bar and rear end bar four parts, and atomization end is disc, truncated cone-shaped or reverse frustoconic, and front end bar is cylindrical or truncated cone-shaped, and middle-end bar and rear end bar are cylindrical.The diameter of rear end bar is less than the diameter of middle-end bar, the diameter of middle-end bar is 2 times to 5 times of front end bar maximum gauge, front end bar maximum gauge is 1 times to 3 times of front end bar minimum diameter, and the maximum gauge of atomization end is more than or equal to the minimum diameter of front end bar and is less than the diameter of middle-end bar.In transducer front end central shaft position, have a clear opening to run through atomization end, front end bar, middle-end bar and rear end bar, this through hole is fluid passage, and through-hole diameter is between 0.2mm to 7mm.

Described electrode weld tabs and transducer rear end are circular, and the rear end bar of transducer front end is connected with back seat with transducer rear end through piezoelectric vibrator group, electrode weld tabs.The external diameter of piezoelectric vibrator group, electrode weld tabs and transducer rear end is identical with the middle-end shank diameter of transducer front end.

Compare with supersonic atomizer of the prior art, the utility model is owing to having adopted technique scheme, atomization ability and the nebulization efficiency of supersonic atomizer have been improved, can realize the atomization with interior liquid to viscosity 100cps, the atomization quantity of 1L/h can be provided for the electrical power of pure water atomization 1W, atomizing particle is between 10 microns to 100 microns, and supersonic atomizer described in the utility model is not stored by body fluid and the restriction of liquid level, in the situation that there is no water conservancy diversion wind, can not spray to any direction yet, in precision, spray, spraying is dry, the fields such as chemical analysis have broad application prospects.

Accompanying drawing explanation

Fig. 1 is the 3D entity schematic diagram of ultrasonic spraying device of the present utility model;

Fig. 2 is the 3D profile of ultrasonic spraying device of the present utility model;

Fig. 3 is the 3D entity schematic diagram of transducer in ultrasonic spraying device of the present utility model;

Fig. 4 is the section of structure of transducer in ultrasonic spraying device of the present utility model

The specific embodiment:

As depicted in figs. 1 and 2, the utility model discloses a kind of ultrasonic spraying device for atomization thick liquid and suspension, it comprises back seat 3, transducer 1 and shell 2.Described transducer 1 is fixed on back seat 3 by a connecting rod 4, and shell 2 covers on outside transducer 1 and is connected with back seat 3 front sides, and the rear side of back seat 3 is connected with respectively electrical port 31, feed liquor port 32 and air inlet port 33.The inner side first half of described shell 2 is circular cone tubular structure, and latter half is cylinder-like structure, and shell 2 front end face centre bits are equipped with a circular hole outlet, and the atomization end 11a of transducer front end 11 is positioned at this circular hole exit.A clear opening 11e is run through in transducer 1 central shaft position, and aperture is 1.2mm.During work, liquid enters from feed liquor port 32, flows to atomization end 11a face be atomized by the clear opening 11e in transducer 1.At air inlet port 33, pass into 0.05MPa to the Compressed Gas of 0.2MPa, Compressed Gas flows through the cavity between shell 2 and transducer 1 and sprays at atomization end 11a and shell 2 circular hole exits, and the Compressed Gas of ejection is uniformly distributed the drop being atomized.

As shown in Figure 3 and Figure 4, described transducer 1 comprises transducer rear end 12, piezoelectric vibrator group 13, electrode weld tabs 14 and transducer front end 11, and the electrode of piezoelectric vibrator group 13 is drawn by electrode weld tabs 14.Piezoelectric vibrator group 13 is coaxially enumerated and is formed by 2 circular piezoelectric ceramic pieces, and is electrically connected to parallel way, and a piezoelectric vibrator group 13 wherein utmost point is electrically connected to transducer front end 11 and transducer rear end 12.Transducer front end 11 is structurally sequentially divided into atomization end 11a, front end bar 11b, middle-end bar 11c and rear end bar 11d tetra-parts.The rear end bar 11d of transducer front end 11 is connected with connecting rod 4 with transducer rear end 12 through piezoelectric vibrator group 13, electrode weld tabs 14.In this embodiment, the ultrasonic resonator frequency of transducer 1 is 100kHz.

Claims

1. for a ultrasonic spraying device for atomization thick liquid and suspension, it comprises back seat, transducer, shell, electrical port, feed liquor port and air inlet port; It is characterized in that: the transducer of described ultrasonic spraying device is connected to the front side of back seat, jacket is connected outside transducer and with back seat front side, and the rear side of back seat connects respectively electrical port, feed liquor port and air inlet port;

The inner side first half of described shell is circular cone tubular structure, and latter half is cylinder-like structure, and shell front end face centre bit is equipped with a circular hole outlet, and the atomization end of transducer front end is positioned at this circular hole exit;

The ultrasonic frequency of described ultrasonic spraying device is between 20kHz to 300kHz;

There is a through hole described transducer front end central shaft position, and aperture is between 0.2mm to 7mm.

2. ultrasonic spraying device according to claim 1, it is characterized in that: described transducer front end is divided into atomization end, front end bar, middle-end bar and rear end bar four parts, atomization end is disc, truncated cone-shaped or reverse frustoconic, front end bar is cylindrical or truncated cone-shaped, and middle-end bar and rear end bar are cylindrical.

3. ultrasonic spraying device according to claim 2, it is characterized in that: the diameter of rear end bar is less than the diameter of middle-end bar, the diameter of middle-end bar is 2 times to 5 times of front end bar maximum gauge, front end bar maximum gauge is 1 times to 3 times of front end bar minimum diameter, and the maximum gauge of atomization end is more than or equal to the minimum diameter of front end bar and is less than the diameter of middle-end bar.

4. ultrasonic spraying device according to claim 1, it is characterized in that: piezoelectric vibrator group is coaxially enumerated and formed by the circular piezoelectric ceramic piece of even number, and be electrically connected to parallel way, a piezoelectric vibrator group wherein utmost point is electrically connected to transducer front end and transducer rear end.

5. according to the ultrasonic spraying device one of claim 1-4 Suo Shu, it is characterized in that: electrode weld tabs and transducer rear end are circular, the rear end bar of transducer front end is connected with back seat with transducer rear end through piezoelectric vibrator group, electrode weld tabs.

6. ultrasonic spraying device according to claim 5, the external diameter of piezoelectric vibrator group is identical with the external diameter of transducer rear end.