公开(公告)号：US20190388924A1

公开(公告)日：2019-12-26

申请号：US16481736

申请日：2018-01-30

Applicant: ENPLAS CORPORATION

Inventor： Kazuma YANAGISAWA ,  Atsushi TAKAHASHI

IPC: B05B12/08 ,  A01G25/02

Abstract: The present invention aims to provide an emitter and a drip irrigation tube that can suppress the variations in the discharge amount of the liquid caused by pressure fluctuations of the liquid in the drip irrigation tube. The emitter of the present invention is to be disposed on an inner wall of a tube including a discharge port, for regulating discharge of irrigation liquid from an inside of the tube to an outside of the tube via the discharge port. The emitter includes an intake portion; a regulating unit; a discharge portion; and a flow path. The regulating unit includes a recess; and a film, the film is fixed in a state of covering an inner space of the recess, a region of the film covering the inner space of the recess is a diaphragm portion, the recess has a through hole inside thereof on its bottom surface, the through hole of the recess communicates with the discharge portion, the recess has a slit communicating with the through hole on its bottom surface, and an edge portion forming an upper surface-side opening of the through hole on the bottom surface of the recess, except for the slit, is a valve seat portion for the film. In a state where the emitter is disposed in the tube, when no liquid is present in the tube, the diaphragm portion of the film is not in contact with the valve seat portion, and when the liquid is present in the tube, the diaphragm portion of the film can be in contact with the valve seat portion in accordance with a pressure of the liquid. The diaphragm portion of the film comes into contact with an entire valve seat portion with a time difference.

公开(公告)号：US20200084981A1

公开(公告)日：2020-03-19

申请号：US16619760

申请日：2018-05-28

Applicant: ENPLAS CORPORATION

Inventor： Kazuma YANAGISAWA ,  Atsushi TAKAHASHI

IPC: A01G25/16 ,  B05B1/30

Abstract: The present invention aims to provide an emitter and a drip irrigation tube that can suppress the variations in the discharge amount of the liquid in the drip irrigation tube. The emitter (120) of the present invention is an emitter for regulating discharge of irrigation liquid. The emitter (120) includes an intake portion for taking in the liquid in the tube (110); a regulating unit that regulates a discharge amount of the liquid; a discharge portion for discharging the liquid via a discharge port (112) of the tube (110); and a flow path communicating the intake portion and the regulating unit. The regulating unit includes a recess and a film, the film is fixed in a state of covering an inner space of the recess, a region of the film covering the inner space of the recess is a diaphragm portion, the recess has a through hole communicating with the discharge portion and a plurality of slits communicating with the through hole, and an edge portion forming an upper surface-side opening of the through hole, excluding the plurality of slits, is a valve seat portion. When the diaphragm portion of the film comes into contact with the valve seat portion, the film and the slits form communication ports to the through hole, and each slit serves as a flow path to the through hole. The emitter (120) satisfies condition (1):Condition (1): Assuming a cross-sectional area of the communication port formed by the film and the slit required when the emitter has one slit to be 1, a cross-sectional area of a communication port to the through hole formed by the film and each slit is less than 1.

公开(公告)号：US20220394941A1

公开(公告)日：2022-12-15

申请号：US17777295

申请日：2020-11-12

Applicant: Enplas Corporation

Inventor： Koki ONO ,  Atsushi TAKAHASHI ,  Yuki TAGUCHI

IPC: A01G25/02

Abstract: The present invention addresses the problem of providing: an emitter that can be placed within a tube without aligning discharge parts of the emitter, is reduced in thickness while having a function for adjusting the flow rate, and is less likely to inhibit irrigation fluid flow. An emitter for solving the above problem is joined to the inner wall surface of a tube through which an irrigation fluid flows, and is used to discharge the irrigation fluid within the tube from a discharge port to the outside of the tube. The emitter has: at least one intake part; one discharge amount adjustment part; one discharge groove; and a plurality of discharge parts. The plurality of discharge parts are disposed symmetrically on both sides of the center of the emitter in a plan view.