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US 10,240,818 B2Granted
Water heating system
AssigneeNoritz Corporation
InventorsTakao Muko, Shinichi Okamoto
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AssigneeNoritz Corporation
InventorsTakao Muko, Shinichi Okamoto
Estimating the term…
A controller is configured to set total stop in which operations of all of a plurality of water heaters are stopped when an abnormal condition of a fan or an abnormal condition in communication is sensed in any of the plurality of water heaters while at least one of the plurality of water heaters is operating. The controller is further configured not to set total stop when an abnormal condition of the fan or an abnormal condition in communication is sensed in at least one of the plurality of water heaters while a sensing element for sensing a backflow of an exhaust from an exhaust path assembly is connected to the controller.
A water heating system comprising:
Dependencies are inferred from the claim text.
From the US filing history. Foreign family members aren’t listed.
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Using fluid fuel: preventing or detecting the return of combustion gases
Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion: in…
Devices for conducting smoke or fumes, e.g. flues: smoke conduit systems for factories or large buildings
Preventing development of abnormal or undesired conditions, i.e. safety arrangements: using electronic means
About 11 years of term left · ends 13 Oct 2037 (estimated)
This invention relates to a water heating system and more particularly to a water heating system in which a plurality of water heaters are linked to one another.
A water heating system in which a plurality of water heaters are linked in parallel (which is hereinafter also referred to as a linked water heating system) has been known. In such a water heating system, hot water can be supplied at a high flow rate by connecting a hot water supply control unit of each water heater to a controller and collectively controlling all water heaters in accordance with a control signal from the controller to each hot water supply control unit.
For example, Japanese Patent Laying-Open No. 2016-121851 shows what is called a common vent type linked water heating system configured to connect an exhaust duct of each water heater to a common exhaust duct assembly and to collect a combustion exhaust generated in each water heater to the exhaust duct assembly by using a fan in the water heater and guide the exhaust to the outside.
FIG. 1 is a diagram of a configuration of a water heating system according to a first embodiment.
FIG. 2 is a diagram of a configuration of a water heater according to the first embodiment.
FIG. 3 is a flowchart of processing for checking connection to an alarm unit according to the first embodiment.
Embodiments of the present invention will be described below in detail with reference to the drawings. The same or corresponding elements in the drawings below have the same reference characters allotted and description thereof will not be repeated in principle.
A water heating system implemented by linking three water heaters in parallel will initially be described in a first embodiment of the present invention. Though a latent heat recovery type water heater which can recover latent heat of a combustion gas is described as each water heater of a water heating system 110 according to the present first embodiment, a type of heating by the water heater is not limited to the latent heat recovery type. The number of water heaters implementing water heating system 110 is not limited to three and two or four or more water heaters are applicable.
FIG. 1 is a diagram showing an overall configuration of water heating system 110 according to the first embodiment of the present invention. Water heating system 110 according to the first embodiment is installed in the inside of a room 2.