Chemical sanitizing of foodware
First Claim
1. A sanitizing rinse system for use in a dishwashing machine for supplying a predetermined quantity of rinse solution comprised of hot fresh water and a chemical sanitizing agent uniformly distributed therein at a predetermined concentration, and for spraying the solution onto foodware items, such as dishes, within a chamber in the dishwasher, comprising:
- (a) rinse nozzles for spraying the rinse solution onto the items within the chamber;
(b) a source of hot fresh water connected for introducing and circulating such fresh water as rinse water to said rinse nozzles;
(c) a source of chemical sanitizing agent connected and constructed for introducing a predetermined quantity thereof into said rinse water when actuated for providing said rinse solution; and
(d) control means for sensing the temperature of said hot fresh water and actuating said chemical sanitizing agent source for metering a predetermined quantity of said sanitizing agent into said rinse water when said hot fresh water temperature is sensed by said control to be below a predetermined threshold minimum.
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Accused Products
Abstract
In a commercial dishwashing machine the temperature of the final hot fresh rinsing water is sensed and sanitizer is injected into the rinsing water in a predetermined amount when the temperature of the hot rinsing water is sensed to be below a predetermined threshold minimum. The temperature sensing is accomplished with an electrical sensing device. The electrical temperature sensing device energizes the sanitizer for injection of sanitizer into the rinse water preferably within a predetermined temperature range of the hot rinsing water defined at a bottom limit by a threshold minimum and at an upper limit by a threshold maximum temperature.
32 Citations
16 Claims
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1. A sanitizing rinse system for use in a dishwashing machine for supplying a predetermined quantity of rinse solution comprised of hot fresh water and a chemical sanitizing agent uniformly distributed therein at a predetermined concentration, and for spraying the solution onto foodware items, such as dishes, within a chamber in the dishwasher, comprising:
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(a) rinse nozzles for spraying the rinse solution onto the items within the chamber; (b) a source of hot fresh water connected for introducing and circulating such fresh water as rinse water to said rinse nozzles; (c) a source of chemical sanitizing agent connected and constructed for introducing a predetermined quantity thereof into said rinse water when actuated for providing said rinse solution; and (d) control means for sensing the temperature of said hot fresh water and actuating said chemical sanitizing agent source for metering a predetermined quantity of said sanitizing agent into said rinse water when said hot fresh water temperature is sensed by said control to be below a predetermined threshold minimum. - View Dependent Claims (2, 3, 4, 5)
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6. In combination with a dishwashing machine having a cleansing chamber, a sump for said chamber, means including a motor driven pump and a spray device connected to spray cleansing liquid over soiled articles in said chamber and to recirculate the sprayed liquid from the pump through said spray device, automatically operable fill and drain valves for controlling the supply and the drainage of water to and from said sump, and a cycle control means connected to operate said valves and said pump in a desired sequence including at least one washing cycle and one final rinsing cycle during each of which fresh water is supplied from a hot water source to said sump, a supply reservoir for containing sanitizer liquid, metering means having an inlet connected to said reservoir and an outlet passage opening into said cleansing chamber to transfer a predetermined amount of sanitizer liquid into said cleansing chamber for mixture with the fresh water;
- the improvement comprising temperature sensing means connected to said fresh water supply for sensing the temperature of said fresh water during said one final rinsing cycle and adapted to energize said metering means for the supply of sanitizer to said chamber when said temperature sensing means senses a hot water temperature below a predetermined threshold.
- View Dependent Claims (7, 8, 9, 10)
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11. A method for washing and sanitizing dishes or other articles comprising:
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a) placing articles to be washed into the cleansing chamber of a dishwashing machine; b) spraying cleansing liquid over the soiled articles; c) draining the cleansing liquid; d) rinsing the dishes with hot rinsing water; e) sensing the temperature of the rinsing water; f) Injecting sanitizer into the rinsing water in a predetermined amount when said temperature of said hot rinsing water is sensed to be below a predetermined threshold minimum. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification