Interruption of measured variable analyses in an automatic water softening system when defined operating situations are present
First Claim
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1. A method for operating a water softening blending system comprising:
- mixing a blended water flow V(t)blended from a first, softened partial flow V(t)part1soft and a second untreated water partial flow V(t)part2raw with an automatically adjustable blender; and
readjusting an adjustment position of the blender with an electronic controller using one or more experimentally determined instantaneous measured values in such a fashion that a water hardness in the blended water flow V(t)blended is adjusted to a predetermined desired value (SW), andwherein the electronic controller ignores at least one of the one or more instantaneous measured values for readjustment of the adjustment position of the blender in one or more defined operating situations of the water softening blending system, and instead uses a respectively last corresponding measured value that was valid prior to occurrence of the defined operating situation, or a standard value for a corresponding measured value, which is stored in the electronic controller,wherein the method comprises a sensor in an untreated water area of the water softening blending system for determining an instantaneous untreated water hardness WHrawinst and at least two flow meters for direct or indirect determination of instantaneous partial flows V(t)part1softinst and V(t)part2rawinst and the electronic controller ignores at least one of the instantaneous measured values WHrawinst,V(t)part1softinst and V(t)part2rawinst for readjustment of the adjustment position of the blending device in the defined operating situations, and instead uses a respectively last corresponding measured value that was valid prior to occurrence of the defined operating situation or a standard value for a corresponding measured value, which is stored in the electronic controller.
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Abstract
A method for operating a water softening system (1) comprising
- an automatically adjustable blending means for mixing a blended water flow V(t)blended from a first, softened partial flow V(t)part1soft and a second untreated water partial flow V(t)part2raw and comprising
- an electronic control means (11),
wherein the control means (11) readjusts the adjustment position of the blending means by means of one or more experimentally determined instantaneous measured values in such a fashion that the water hardness in the blended water flow V(t)blended is adjusted to a predetermined desired value (SW),
is characterized in that
the control means (11) ignores at least one of the one or more instantaneous measured values for readjustment of the adjustment position of the blending means in one or more defined operating situations, and instead uses the respectively last corresponding measured value that was valid prior to occurrence of the defined operating situation, or a standard value for the corresponding measured value, which is stored in the electronic control means (11). The inventive method reduces the wear of the automatically adjustable blending means and improves the reliability of the adjustment of the water hardness of the blended water.
11 Citations
21 Claims
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1. A method for operating a water softening blending system comprising:
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mixing a blended water flow V(t)blended from a first, softened partial flow V(t)part1soft and a second untreated water partial flow V(t)part2raw with an automatically adjustable blender; and readjusting an adjustment position of the blender with an electronic controller using one or more experimentally determined instantaneous measured values in such a fashion that a water hardness in the blended water flow V(t)blended is adjusted to a predetermined desired value (SW), and wherein the electronic controller ignores at least one of the one or more instantaneous measured values for readjustment of the adjustment position of the blender in one or more defined operating situations of the water softening blending system, and instead uses a respectively last corresponding measured value that was valid prior to occurrence of the defined operating situation, or a standard value for a corresponding measured value, which is stored in the electronic controller, wherein the method comprises a sensor in an untreated water area of the water softening blending system for determining an instantaneous untreated water hardness WHrawinst and at least two flow meters for direct or indirect determination of instantaneous partial flows V(t)part1softinst and V(t)part2rawinst and the electronic controller ignores at least one of the instantaneous measured values WHrawinst,V(t)part1softinst and V(t)part2rawinst for readjustment of the adjustment position of the blending device in the defined operating situations, and instead uses a respectively last corresponding measured value that was valid prior to occurrence of the defined operating situation or a standard value for a corresponding measured value, which is stored in the electronic controller. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for operating a water softening blending system comprising:
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mixing a blended water flow V(t)blended from a first, softened partial flow V(t)part1soft and a second untreated water partial flow V(t)part2raw with an automatically adjustable blender; and readjusting an adjustment position of the blender with an electronic controller using one or more experimentally determined instantaneous measured values in such a fashion that a water hardness in the blended water flow V(t)blended is adjusted to a predetermined desired value (SW), and wherein the electronic controller ignores at least one of the one or more instantaneous measured values for readjustment of the adjustment position of the blender in one or more defined operating situations of the water softening blending system, and instead uses a respectively last corresponding measured value that was valid prior to occurrence of the defined operating situation, or a standard value for a corresponding measured value, which is stored in the electronic controller, wherein the defined operating situations include times when an experimentally determined instantaneous water hardness, an instantaneous untreated water hardness WHrawinst or an instantaneous blended water hardness WHblendedinst is outside of a predetermined value interval. - View Dependent Claims (19, 20, 21)
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Specification