JPS6318460Y2 - - Google Patents

Description

[Detailed description of the invention] This invention involves inserting a plug-type heating element into the center of a horn joined with piezoelectric ceramics, heating the liquid by feeding it around the heating element, and heating the heated liquid. An ultrasonic vibrator for liquid atomization that vibrates the piezoelectric ceramic with a horn that magnifies the vibration and causes the liquid to be ejected in an atomized state from a nozzle hole at the tip of the horn,
Even for highly viscous liquids such as alcohol, it is heated in the horn to promote atomization through vibration, and is suitable for use in internal combustion engine vaporizers, combustion parts of twisting equipment, humidifiers, etc. It is suitable for this application.

An embodiment of the present invention will be described with reference to the accompanying drawings.

In the figure, reference numeral 2 denotes an exponential type horn, which is integrally formed with a metal block 1 made of aluminum alloy or the like provided with a mounting flange 3. A screw hole 4 is provided at the center of the top end surface of the metal block 1.
A ring-shaped piezoelectric ceramic 8 having electrodes 9 and 10 provided on both sides is pasted and fixed around the opening with an adhesive layer 11.

Reference numeral 12 is a glow plug type heating element, in which the end of a metal sheath 15 with a long U-shaped cross section is fitted and fixed to the tip of a pipe-shaped outer shell 13 provided with a hexagonal nut-shaped head 14, and a heating coil is attached to the tip. The central shaft 16 with one end of the heating coil 17 fitted is inserted from the head 14 centering on the outer shell 13, and the tip of the heating coil 17 is fixed to the tip of the metal sheath 15 by soldering or the like.
A nut 21 is filled with a heat-resistant insulating powder 18 such as magnesium, and an insulating ring 19 and a terminal 20 are placed on the head 14 of the outer shell 13, and the nut 21 is screwed onto the center shaft 16.
Hold down the terminal 20 etc. with.

The plug type heating element 12 has an outer shell 1 as shown in the figure.
Screw the male screw formed under the head 14 of the horn 3 into the screw hole 4 of the metal block 1, connect it to the screw hole 4, and connect it to the enlarged hole 5 formed at the center of the metal block 1 and the horn 2 in the form of a gap. When fitted, a liquid supply path 22 is formed around the metal sheath 15 to be supplied from the liquid supply port 7 opened at the side of the metal block 1. Expanded hole 5
is communicated with a nozzle hole 6 opening at the center of the tip surface of the horn 2.

In this embodiment, an oscillating voltage is applied from the high frequency oscillator 23 to the piezoelectric ceramic 8 to cause expanded vibration in the horn 2, and at the same time, the heating coil 17 of the plug-type heating element 12 is energized to generate heat, and the liquid supply port 7 The liquid fed from the pump is heated in the feeding path 22, and further vibrated by the piezoelectric ceramic 8 such as the horn 2, the heated liquid is excited by ultrasonic waves, atomized, and discharged from the nozzle hole 6.

As clarified from the above explanation, in the present invention, the plug-type heating element 12 is inserted into the center of the horn 2 that magnifies the super-vibration of the piezoelectric ceramic 8. The liquid is heated by the heating element 12 to lower the liquid viscosity, is excited by the expanded vibration of the horn 2, is atomized, and is discharged from the nozzle hole 6, and the efficiency of liquid atomization is extremely high. . In addition, in terms of structure, the plug-type heating element 12, which has been assembled and manufactured externally, is inserted into the center of the horn 2 and fixed by screwing, etc., and the enlarged hole 5 is pre-drilled in the horn 2 together with the nozzle hole 6 etc.
The liquid feeding path 22 can be provided between the outer periphery of the heating element 12 and the heating element 12, and the installation and assembly of the heating element can be simplified, and the number of failure parts can be reduced. It can be replaced extremely easily, and repairs and inspections can also be made simple.

[Brief explanation of drawings]

The accompanying drawing is a longitudinal cross-sectional side view of the center of an embodiment of the present invention. 2→Horn, 5→Enlarged hole, 6→Nozzle hole, 7→
Liquid supply port, 8→piezoelectric ceramic, 12→plug-type heating element, 13→pipe-shaped outer shell, 14→head, 15→metal sheath, 16→center shaft, 17→heating coil, 18→
Heat-resistant insulating powder, 19 → insulation ring, 20 → terminal, 21 → nut, 22 → feed path, 23 → high frequency oscillator.

Claims (1)

[Scope of utility model registration request] A plug-type heating element is inserted into the center of a horn joined to piezoelectric ceramics, and a liquid feeding path is provided around the heating element, and the feeding path is communicated with a nozzle hole opened at the tip surface of the horn. Ultrasonic vibrator for liquid atomization.