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Medium-frequency ultrasonic atomizing spray head with polarizing in radial thickness direction

A radial thickness, ultrasonic atomization technology, applied in the direction of spraying devices, liquid spraying devices, etc., can solve the problems of inability to spray, working frequency not higher than 120KHz, inconvenient processing, etc.

Inactive Publication Date: 2014-05-07
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the previous technology, if the size of the nozzle is too small, it cannot be sprayed, and it is inconvenient to process
Therefore, the working frequency of the traditional longitudinal composite piezoelectric transducer whose polarization direction is the axial thickness direction and whose front and rear cover plates are made of metal materials cannot be higher than 120KHz

Method used

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  • Medium-frequency ultrasonic atomizing spray head with polarizing in radial thickness direction
  • Medium-frequency ultrasonic atomizing spray head with polarizing in radial thickness direction
  • Medium-frequency ultrasonic atomizing spray head with polarizing in radial thickness direction

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] like figure 1 , figure 2 and image 3 As shown, the size of the entire ultrasonic atomizing nozzle is one ultrasonic pressure wave wavelength. The middle of the piezoelectric ceramic crystal stack is a nodal plane, and the distance between the nodal plane and the left and right end faces of the ultrasonic nebulizer is 1 / 2 wavelength respectively. Both the inner and outer walls of the piezoelectric ceramics 3 are coated with a silver layer 6 , and the right side of each piezoelectric ceramic 3 is pasted with an insulating ring 4 . Four piezoelectric ceramics 3 polarized in the radial thickness direction coaxially form a piezoelectric ceramic crystal pile, the left end of the piezoelectric ceramic crystal pile is connected to the rear cover plate 7, the rear cover plate 7 is a SiC ceramic crystal pile, and the right end of th...

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Abstract

The invention discloses a medium-frequency ultrasonic atomizing spray head with polarizing in radial thickness direction. The integral vibration direction of the spray head is the axial direction. The medium-frequency ultrasonic atomizing spray head with polarizing in radial thickness direction is characterized in that a piezoelectric ceramic crystal pile consists of four piezoelectric ceramics with polarizing in the radial thickness direction, and the axial thickness w of the piezoelectric ceramic is greater than the radial thickness t; the axial deformation is greater than the radial deformation when the piezoelectric ceramic crystal pile vibrates, and the working frequency of the piezoelectric ceramic can reach 300 KHz to 500 KHz. The medium-frequency ultrasonic atomizing spray head with polarizing in radial thickness direction has the advantages that smaller mist droplets can be obtained, and the chemical structure of nutrient liquid is not damaged; the SiC (silicon carbide) ceramic crystal pile is used as a front cover plate and a back cover plate, thereby overcoming the defect that the working efficiency cannot be higher than 120 KHz when the traditional longitudinal composite type piezoelectric transducer adopts the metal material to form the front cover plate and the back cover. The spray head can be applied to the filed of atomizing culturing.

Description

technical field [0001] The invention belongs to the field of atomization cultivation, and in particular relates to an ultrasonic atomization nozzle technology. Background technique [0002] Compared with traditional atomizers (such as air-water ejectors, centrifugal sprayers and low-pressure nozzles), ultrasonic atomizers can produce finer droplets, which are more conducive to plant growth. At present, the high-frequency ultrasonic atomizers commonly used at home and abroad with a working frequency greater than 1MHz have disadvantages such as large driving voltage, low water and fertilizer utilization efficiency, high energy consumption, and damage to the chemical structure of the nutrient solution through cavitation. In addition, due to the use of extremely thin The nebulizing sheet has low reliability and short life. Compared with high-frequency ultrasonic nebulizers, low-frequency ultrasonic nebulizers (working frequency between 20KHz-100KHz) have disadvantages such as e...

Claims

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Application Information

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IPC IPC(8): B05B17/06
CPCB05B17/0607B05B17/063B05B17/0638
Inventor 高建民张竞宇
Owner JIANGSU UNIV
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