Rinnai Corporation

Ryosuke Yuge

Shigeki Takeuchi

Takaaki Nakagoshi

In a water heater provided with an inlet pipe a downstream end of which is connected with an upstream end of a water heating channel of a heat exchanger for producing hot water, an outlet pipe an upstream end of which is connected with a downstream end of the water heating channel, and a bypass pipe branching at a part of the inlet pipe, which is positioned at an upstream-end part away from an upstream end, and is connected with a part of the outlet pipe, which is positioned at a more downstream part than at an upstream end, a connecting part of the bypass pipe with the outlet pipe and another connecting part of an inlet pipe and the upstream end of the water heating channel are arranged at a same height in a setting state of the water heater.

Water heater

Provided is a heat medium circulation device with a simple structure, capable of reducing power consumption in performing an anti-freezing treatment. A first heat medium circuitand a second heat medium circuitare connected via a connectorAn anti-freezing control unitactivates the first pumpwith the second pumpin a stopped state, when preventing the heat medium in the first heat medium circuitfrom freezing.

Heat medium circulation device

A hot-water supply systemcomprises a temperature responsive valveprovided in a first bypass passage, an orificeprovided in a second bypass passage, a flow rate sensorprovided in a water supply passagedownstream from a connection point with the second bypass passage, a circulating pumpprovided in the water supply passagedownstream from the connection point with the second bypass passage, and a controller. The controlleroperates the circulating pumpand executes circulation heating operation for operating a burner to heat the hot water circulating through a circulation circuit, when a flow rate detected by the flow rate sensoris equal to or more than a specified flow rate.

Growing community of inventors

Aichi, Japan

Ryosuke Yuge