US 12,405,139 B1
Flowmeter
Takahiro Kawamoto, Tokyo (JP); Takuo Shimada, Tokyo (JP); Shinji Tobimatsu, Tokyo (JP); Maya Nakamura, Tokyo (JP); and Yuka Fujie, Tokyo (JP)
Assigned to TOFLO CORPORATION, Tokyo (JP)
Filed by TOFLO CORPORATION, Tokyo (JP)
Filed on Feb. 19, 2025, as Appl. No. 19/057,723.
Claims priority of application No. 2024-087672 (JP), filed on May 30, 2024; and application No. 2024-154293 (JP), filed on Sep. 6, 2024.
Int. Cl. G01F 1/115 (2006.01); G01F 1/075 (2006.01)
CPC G01F 1/1155 (2013.01) [G01F 1/0755 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A flowmeter, comprising:
a flow path pipe having a flow path for fluid to flow through;
an impeller supported in an interior of the flow path pipe in a rotatable manner; and
a sensor that measures the flow of the fluid flowing in the flow path through the rotation of the impeller,
wherein the sensor is provided with a metal-based wiring substrate inside a sensor housing provided outside the flow path pipe,
the wiring substrate is equipped with a magnetic sensor package that detects a magnetic force of the impeller; a heater that heats the wiring substrate; and a temperature control circuit that controls the heater to power on/off based on a temperature of the wiring substrate,
the magnetic sensor package is mounted on the wiring substrate by welding.