Method for dispensing different amounts of detergent in a warewash machine depending on a fill cycle or a rinse cycle
First Claim
1. A method of dispensing detergent in a warewash machine including a washtank for holding a supply of wash water and a rinse water spray system through which water is supplied in a rinse cycle and in a fill cycle, the method comprising the steps of:
- sensing through a water responsive means or a machine supplied electrical signal when water is supplied to the warewash machine;
determining whether the water is being supplied in a fill cycle or a rinse cycle by sensing whether water is being supplied at a time subsequent to initially sensing when water is supplied to the warewash machine;
dispensing detergent to the washtank of the warewash machine; and
controlling the amount of detergent dispensed based upon the determination of whether the water is being supplied in a fill cycle or a rinse cycle.
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Accused Products
Abstract
A dispensing apparatus and method for dispensing detergent in a warewash machine. The rinse water spray system or an alternate water source is monitored to determine if water is being supplied to the warewash machine. Once water is sensed being supplied to the machine, the apparatus determines whether the water is being supplied for a rinse cycle or a fill cycle. The amount of detergent dispensed is controlled based upon the determination of whether the water is being supplied in a rinse cycle or a fill cycle. If the apparatus determines that the water is being supplied for a rinse cycle, a make-up amount of detergent is dispensed upon completion of the rinse cycle. If the apparatus determines that the water is being supplied for a fill cycle, the washtank is precharged with the desired concentration of detergent during the fill cycle.
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Citations
14 Claims
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1. A method of dispensing detergent in a warewash machine including a washtank for holding a supply of wash water and a rinse water spray system through which water is supplied in a rinse cycle and in a fill cycle, the method comprising the steps of:
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sensing through a water responsive means or a machine supplied electrical signal when water is supplied to the warewash machine; determining whether the water is being supplied in a fill cycle or a rinse cycle by sensing whether water is being supplied at a time subsequent to initially sensing when water is supplied to the warewash machine; dispensing detergent to the washtank of the warewash machine; and controlling the amount of detergent dispensed based upon the determination of whether the water is being supplied in a fill cycle or a rinse cycle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of dispensing detergent in a warewash machine including a washtank for holding a supply of wash water supplied during a fill cycle, a rinse water spray head through which water is supplied to the washtank during at least the rinse cycle, and an overflow drain for draining excess water introduced into the washtank, the method comprising the steps of:
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sensing when water is supplied into the washtank; determining whether the water is being supplied into the washtank in a fill cycle or a rinse cycle; introducing into the washtank during a fill cycle a supply of water sufficient to fill the washtank; introducing during the fill cycle a first supply of detergent sufficient to charge the water supplied into the washtank during the fill cycle; introducing during the rinse cycle a supply of water sufficient to rinse wares in the warewash machine and draining through the overflow drain the excess water introduced into the washtank; and supplying into the washtank after each rinse cycle is complete a second supply of detergent sufficient to fully charge the water in the washtank. - View Dependent Claims (12)
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13. A method of dispensing detergent in a warewash machine including a washtank for holding a supply of wash water and a rinse water spray system through which water is supplied in a rinse cycle and in a fill cycle, the method comprising the steps of:
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monitoring the condition of the rinse water spray system to sense when water is supplied to the warewash machine; determining whether the water is being supplied in a fill cycle or a rinse cycle, including generating a first electrical signal when a rinse cycle is determined and a second electrical signal when a fill cycle is determined; dispensing detergent to the washtank of the warewash machine; and controlling the amount of detergent dispensed based upon the determination of whether the water is being supplied in a fill cycle or a rinse cycle, including dispensing a first amount of detergent after the rinse cycle is complete in response to the first electrical signal and dispensing a second amount of detergent in response to the second electrical signal. - View Dependent Claims (14)
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Specification