Liquid heaters and vaporizers – Automatic control of fluid fuel and water
Reexamination Certificate
2000-09-08
2001-09-18
Wilson, Gregory (Department: 3749)
Liquid heaters and vaporizers
Automatic control of fluid fuel and water
C122S031200, C122S014300
Reexamination Certificate
active
06289852
ABSTRACT:
INTRODUCTION
This invention relates to a hot water and steam generator and, more particularly, to a hot water and steam generator which may be used to heat water to a plurality of desired temperatures and, in addition, to produce steam for the same purpose.
BACKGROUND OF THE INVENTION
In kitchen duty applications, particularly kitchen duty applications where a large number of individuals may eat, the dishes and other utensils are typically washed in several containers, each container holding water at a different and predetermined temperature. The dishes and utensils are typically first washed in water at a lower temperature. Thereafter, they are transferred to a container holding water at a higher temperature for rinsing. The highest temperature water is used for sterilising the dishes and the water is generally maintained at 180 deg. F. The water in the other containers is generally maintained at 130 deg. F. and 150 deg. F., respectively.
Heretofore, each water container generally used its own burner for producing heated water and for maintaining the water in the container at the desired temperature. This was inefficient and unnecessarily costly. In using steam for heating the water, manual operation was provided which, likewise, is an inefficient use of personnel.
SUMMARY OF THE INVENTION
According to the invention, there is provided apparatus for heating water to a predetermined temperature, said apparatus comprising a burner, a water jacket surrounding said burner for heating said water to said predetermined temperature, a water source to supply water to said water jacket surrounding said burner, a water outlet from said water jacket and said burner for carrying said water following said heating of said water by said burner to said predetermined temperature, a pump to move said water from said water source to said water jacket, a water temperature sensor operably connected to said water jacket for sensing said predetermined temperature of said water and a first water volume control for regulating the volume of said water provided to said water jacket of said burner from said water source, said first water volume control being responsive to said water temperature sensor.
According to a further aspect of the invention, there is provided a method of heating water to a predetermined temperature comprising supplying water from a water source through a first water volume control to a water jacket surrounding a burner, heating said water in said water jacket to said predetermined temperature, sensing when said predetermined temperature is reached and regulating said first water volume control to control the volume of water flowing to said burner responsive to said temperature sensing.
According to yet a further aspect of the invention, there is provided apparatus for generating heated water comprising a source of water, a first circuit for conveying water to a burner, a first volume control for regulating the amount of said water conveyed to said burner through said first circuit, a second circuit for conveying water to said burner, a second volume control for regulating the amount of said water conveyed to said burner through said second circuit, an outlet from said burner for said water, and a temperature sensor for sensing the temperature of said water passing from said outlet.
According to still yet a further aspect of the invention, there is provided a method of providing water at more than one predetermined temperature to a water jacket surrounding a burner, said method comprising the steps of selecting one of said predetermined temperatures for said water, passing water through said water jacket to heat said water to said predetermined temperature and regulating the volume of said water provided to said burner so as to maintain said water at said one of said predetermined temperatures.
According to yet a further aspect of the invention, there is provided apparatus for generating steam for heating the temperature of a liquid to a predetermined value, said apparatus comprising a water source, a steam control circuit associated with said water source, a pump associated with said steam control circuit for supplying water to a water jacket of a burner and a steam water level sensor for sensing the level of water in said water jacket.
REFERENCES:
patent: 4308855 (1982-01-01), Schallert
patent: 4530347 (1985-07-01), Baker et al.
patent: 5086731 (1992-02-01), Lockett et al.
patent: 5197415 (1993-03-01), Stretch et al.
patent: 5224445 (1993-07-01), Gilbert, Sr.
Fleming Leonard William
Murgu Cristian
Robinson Edgar C.
International Thermal Investments Ltd.
Uren John Russel
Wilson Gregory
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