Single-hole nozzle device

Abstract

The invention provides a single-hole nozzle device, which at least comprises a first cavity, a second cavity, a body, a jet hole element, an actuating element and a soft circuit board, wherein the first cavity is provided with a first flow channel; the second cavity is separately connected with the first cavity; the body is provided with a second flow channel; the second flow channel is communicated with the first flow channel for conveying a fluid; the jet hole element is arranged on the body and is provided wit a nozzle hole; the actuating element is arranged on the jet hole element and surrounds the nozzle hole; the soft circuit board is arranged on the actuating element, and is provided with a plurality of electrodes; and the plurality of electrodes are connected with the actuating element and the jet hole element respectively.

Description

technical field [0001] The invention relates to a single-hole nozzle device, in particular to a single-hole nozzle device. Background technique [0002] Generally speaking, today's single-hole piezoelectric nozzle devices are mainly used in biochemical medical experimental instruments and industrial dispensing equipment. see Figure 1A , which is a schematic cross-sectional view of a known single-hole piezoelectric nozzle device. As shown in the figure, the known single-hole piezoelectric nozzle device 1 mainly includes a body 10, an orifice sheet 11 and an actuating element 12, wherein the body 10 has a channel 101 , the orifice plate 11 has a nozzle 111 , and the actuating element 12 is arranged around the nozzle 111 on the orifice plate 11 . and see Figure 1B , which is Figure 1A As shown in the figure, it is known that a welding spot 13 is respectively arranged on the nozzle hole sheet 11 and the actuator element 12, so that the first electrode 141 and the second ele...

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Problems solved by technology

[0003] see again Figure 1A Since the orifice plate 11 of the known single-hole piezoelectric nozzle device 1 is directly pasted on the body 10 and corresponds to the flow channel 101, once the orifice plate 11 is damaged, the entire body 10 needs to be replaced together. , it is impossible to replace only the orifice sheet 11, and there will be a lack of cost increase; in addition, please refer to Figure 1B , the welding spot 13 protrudes from the orifice plate 11 and the actuating element 12, and the actuating element 12 is easily exposed to the sprayed liquid and causes the electrodes to communicate with each other and cause a short circuit, so when the In order to protect its characteristics from loss, the actuator 12 is often coated with an isolation layer or isolation glue on the surface, so the protrusion of the solder joint 13 will cause certain difficulties to the process of coating an isolation layer or isolation glue on the surface of the actuator 12 degree, it is necessary to improve

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