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US 4,085,735 AGranted
Air ventilation and washing system
AssigneeNational Food Service Equipment Fabricators, Inc.
InventorsArnold S. Kaufman, Robert L. Anderson
Life of this patent
Estimating the term…
Abstract
An air ventilation and washing system for extracting noxious or other impure air, such as is present above the cooking surface of a stove having automatically activated electrical and mechanical fire control apparatus selectively responsive to changes in temperature is disclosed.
Claims15
In a ventilation system including an interior wall defining a chamber through which contaminated hot air is adapted to pass, an improved cleaning and fire extinguishing system for cleaning contaminants from said interior wall and extinguishing any fire or incipient fire in the proximity of said chamber, comprising:
- a fluid dispersing member in said chamber;
- said fluid dispersing member having outlet openings through which cleaning fluid may be dispersed onto said interior wall of said chamber to wash away contaminants thereon;
- pump means for delivering cleaning fluid through said fluid dispersing member and onto said interior wall of said chamber;
- means for selectively operating said pump means to selectively deliver cleaning fluid to said fluid dispersing member and through said outlet openings thereof and onto said interior wall of said chamber;
- temperature sensing means in close proximity to said chamber for sensing the temperature within said chamber;
- and
- means operatively associated with said temperature sensing means for operating said pump means when said temperature sensing means senses a temperature above a first predetermined level in the vicinity of said chamber to deliver fluid to said fluid dispersing means and into said chamber, and further including a bypass line passing around said pump means for delivering fluid from a source of fluid to said fluid dispersing member and into said chamber;
- and further including a normally closed valve means in said bypass line;
- and further including means connected to said valve means for opening said valve means when the temperature in the vicinity of said chamber exceeds a second predetermined level above said first predetermined level for opening said valve means to deliver fluid from a source of fluid to said fluid dispersing member and into said chamber.
6 more elements
In a ventilation system including an exhaust fan chamber, an exhaust hood and a duct extending between said exhaust fan chamber and said exhaust hood, an improved cleaning and fire extinguishing system, comprising:
- a fluid dispersing member extending through said duct and into said exhaust fan chamber and said exhaust hood;
- said fluid dispersing member having outlet openings through which cleaning fluid may be dispersed into said exhaust fan chamber, said duct and said exhaust hood;
- pump means for delivering cleaning fluid to said fluid dispersing member;
- means for selectively operating said pump means to selectively deliver cleaning fluid to said fluid dispersing member and through said fluid dispersing member and into said exhaust fan chamber, said duct and said exhaust hood;
- first temperature responsive means disposed in close proximity to said exhaust hood and operatively associated with said pump means for operating said pump to deliver fluid to said fluid dispersing member and through said fluid dispersing member and into said exhaust fan chamber, said duct and said exhaust hood when the temperature in the proximity of said exhaust hood exceeds a first predetermined level;
- a bypass line bypassing said pump means for selectively delivering fluid from a source of fluid to said fluid dispersing member when the temperature in the vicinity of said exhaust hood exceeds a second predetermined level;
- valve means disposed in said bypass line;
- and
- second temperature responsive means disposed in close proximity to said exhaust hood and operatively associated with said valve means in said bypass line for causing fluid to be delivered from a source of fluid through said bypass line and to said fluid dispersing member when the temperature in the proximity of said exhaust hood exceeds a second predetermined level above said first predetermined level.
6 more elements
An improved exhaust, cleaning and fire extinguishing system, comprising:
- means defining an exhaust chamber having an interior wall;
- fluid dispersing means disposed in said exhaust chamber for selectively dispersing fluid into said exhaust chamber;
- fluid delivery means for selectively delivering fluid to said fluid dispersing means;
- first temperature responsive means disposed in close proximity to said exhaust chamber and operatively associated with said fluid delivering means for causing fluid to be delivered to said fluid dispersing means and onto the interior wall of said exhaust chamber when the temperature within said exhaust chamber exceeds a first predetermined level;
- and
- second temperature responsive means disposed in close proximity to said exhaust chamber and operatively associated with said fluid delivery means for causing fluid to be delivered to said fluid dispersing means and into said exhaust chamber when the temperature in said exhaust chamber exceeds a second predetermined level above said first predetermined level.
3 more elements
Dependencies are inferred from the claim text.