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AssigneeToto Ltd.
InventorsOsamu Tsutsui, Hideki Kawaguchi, Keiji Hayashi, Masahiro Kayano, Shingo Tanaka, Hiroshi Kobayashi, Hisashi Nakamura, Atsuo Makita
Estimating the term…
A multiple purpose instantaneous gas water heater comprises a combination of a larger combustion capacity type first burner with a smaller combustion capacity type second burner. Each of the burners can be controlled by a proportional combustion control method and/or an intermittent combustion control method. It is possible to combine these functions within a microcomputer system so as to use each or both burners selectively, or both together, so that it is possible to select water from a wide range of hot water temperatures or to select a target temperature.
A multiple-purpose instantaneous gas water heater comprising:
A multiple-purpose instantaneous gas water heater in accordance with claim 53 further comprising first and second electrical valves, first and second proportional control valves, and a fuel gas feeding pipeline, said first and second electrical valves being operable to selectively open said fuel gas feeding pipeline in response to receipt of said signals, said first and second proportional valves comprising means for continuously controlling the fuel gas flow rate through said gas feeding pipeline.
A multiple-purpose instantaneous gas water heater comprising:
A multiple-purpose instantaneous gas water heater comprising:
A multiple-purpose instantaneous gas water heater comprising:
A multiple-purpose instantaneous gas water heater comprising:
A cold and hot water showering device which comprises a first burner and a second burner adapted to be arranged adjacent to a heat exchanger unit, means for determining the highest and lowest combustion capacity of said first burner, wherein the highest combustion capacity of the second burner is slightly greater than the lowest combustion capacity of the first burner, means for detecting a water flow rate, means for detecting a feeding water temperature, and means for detecting hot water temperature, all of said detecting means being arranged, respectively, along a feeding water pipeline channel which extends through said heat exchanger, a control panel comprising means for setting a temperature, an arithmetic-logic device in the form of a microprocessor comprising means for calculating a required heat load in accordance with data input from each of said detecting means, means for selecting a usable burner in accordance with the required heat load calculated by said microprocessor, means for selecting the combustion capacity control method of said second burner in accordance with the required heat load calculated when said second burner is selected, and means for selectively generating signals for turning off combustion of said burners, for intermittently combusting said second burner, for proportionally combusting said second burner, for proportionally combusting said first burner, and for proportionally combusting said first and second burners in response to selection of a desired burner by said burner selecting means and in response to the control method selected by said control method selecting means.
A method of using a multiple-purpose instantaneous gas water heater, which water heater comprises a first burner, a second burner and a heat exchanger, said first and second burners being positioned adjacent said heat exchanger, said gas water heater further comprising means for setting the highest and lowest combustion capacities of said burners, wherein the highest combustion capacity of said second burner is slightly larger than the lowest combustion capacity of said first burner, means for detecting a water flow rate, means for detecting the temperature of feeding water, and means for detecting the temperature of hot water, all three of said detecting means being arranged, respectively, along a feeding water pipeline channel extending through said heat exchanger, a control panel including means for setting said water temperature, a microprocessor with arithmetic-logic means for receiving data from each of said detecting means and said temperature setting means and for defining a required heat load in response to the data received, and means for selecting at least one of said burners in accordance with the heat load determined by said microprocessor, wherein said method comprises selecting a method for controlling the combustion capacity of said second burner in response to the determination of the required heat load, wherein said method comprises selecting said second burner with said burner selecting means, and generating signals for shutting off combustion of said first and second burners, for generating a signal for intermittent combustion of said second burner, generating a signal to initiate proportional combustion of said second burner, initiating a signal for initiating proportional combustion of said first burner, or initiating a signal for initiating proportional combustion of said first and second burners, each of said signals being generated in response to selection of a burner and selection of said control method by said burner selection means and a control method selection device, respectively
Dependencies are inferred from the claim text.