GAS-LIQUID MIXING DEVICE AND BATH HOT WATER SUPPLY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a gas-liquid mixing device which can perform natural intake even if a flow rate of a liquid is low, and refines a gas by stable intake and can increase an amount of the gas mixed in the liquid, and a bath hot water supply device equipped with the gas-liquid mixing device.SOLUTION: A gas-liquid mixing device 1 includes: a reduced diameter part 4 of which an inner diameter decreases towards a direction TD of travel of a liquid; a gas-liquid mixing part 5 which is provided concentrically with the reduced diameter part 4 on a downstream side of the reduced diameter part 4 and has an inner diameter larger than a minimum inner diameter of the reduced diameter part 4; a ring part 2 which expands from a downstream end of an inner peripheral surface of the reduced diameter part 4 to an outer peripheral side and is connected to an upstream end 5a of an inner peripheral surface of the gas-liquid mixing part 5; and a gas introduction part 6 which introduces a gas into the gas-liquid mixing part 5 through a gas passage 6a. The ring part 2 is connected to the inner peripheral surface of the gas-liquid mixing part 5 at a downstream position with respect to the downstream end of the reduced diameter part 4.