US20100258145A1 - Method for detecting a load-related change in thermal capacity of a water-bearing domestic appliance - Google Patents
Method for detecting a load-related change in thermal capacity of a water-bearing domestic appliance Download PDFInfo
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- US20100258145A1 US20100258145A1 US12/745,699 US74569908A US2010258145A1 US 20100258145 A1 US20100258145 A1 US 20100258145A1 US 74569908 A US74569908 A US 74569908A US 2010258145 A1 US2010258145 A1 US 2010258145A1
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- temperature
- wash
- temperature trend
- water
- load
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
- A47L15/0021—Regulation of operational steps within the washing processes, e.g. optimisation or improvement of operational steps depending from the detergent nature or from the condition of the crockery
- A47L15/0034—Drying phases, including dripping-off phases
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/48—Drying arrangements
- A47L15/483—Drying arrangements by using condensers
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/4291—Recovery arrangements, e.g. for the recovery of energy or water
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/4295—Arrangements for detecting or measuring the condition of the crockery or tableware, e.g. nature or quantity
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
- A47L2401/04—Crockery or tableware details, e.g. material, quantity, condition
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
- A47L2401/12—Water temperature
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
- A47L2401/34—Other automatic detections
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
- A47L2501/11—Air heaters
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
- A47L2501/30—Regulation of machine operational steps within the washing process, e.g. performing an additional rinsing phase, shortening or stopping of the drying phase, washing at decreased noise operation conditions
Definitions
- the invention relates to a method as claimed in the preamble of claim 1 .
- the thermal behavior of said appliances varies as a function of the amount and type of wash items, i.e. the items loaded cause a change in thermal capacity, with the result that, for example, the duration of cooling or drying processes is extended or reduced.
- WO 2004/047608 A1 discloses a method for detecting the amount of items in the washing compartment (tub) of a dishwasher, wherein both motor operating data of a circulating pump and the so-called heating gradient in the dishwasher are recorded at least in a pre-wash phase and in a heating phase. The actual values captured are compared with the stored setpoint values and the amount of items in the washing compartment is inferred therefrom. The wash program can then be adapted to suit the amount of items ascertained.
- This method requires a high degree of open- and closed-loop control complexity, as a large number of curve or measurement data scenarios must be stored in a program control unit and compared with the captured values for the setpoint/actual comparison.
- the heating power of a dishwasher depends on the locally available electricity supply voltage, with the result that variations in the locally available supply voltage can falsify the measurement result.
- the object of the invention is therefore to provide an improved method.
- the object of the invention is achieved by a method for detecting the load-related change in thermal capacity of a water-bearing domestic appliance, in particular a dishwasher, to optimize a drying process.
- a temperature trend during cooling of the wash items is captured. For example, during the main cleaning cycle, the temperature of the cooling wash liquor, which is in temperature equilibrium with the wash items, is measured. Because a large load cools down more slowly than a small one, the captured temperature trend of the wash liquor can be used as a measure for the load. It can be captured in a technically simple manner via a temperature sensor, because the sensor can be incorporated in the circulation path without great technical complexity. Alternatively or in addition, the temperature trend can be captured on a condensation surface, e.g. on the inside of a door or on the outside of a water tank used as a container for temporarily storing water and/or wash liquor.
- pairs of temperature values are captured at two different locations in the appliance.
- a first value can be determined in an area upstream of the wash items, and a second downstream thereof.
- a temperature difference e.g. of the wash liquor can therefore be obtained from values before and after contact with the wash items.
- the change in thermal capacity due to the wash items can be determined from the change in the difference.
- the correlation between temperature trend and thermal capacity also applies to measuring a temperature on the condensation surface.
- the temperature trend is captured after mixing of wash liquor with fresh water, i.e. the change in thermal capacity due to the load is determined calorimetrically by measuring a mixing temperature from one of the two temperature values in the event of a change or at least partial change in the wash liquor. This can take place, for example, during the cleaning cycle or an intermediate wash cycle.
- a first cleaning cycle with warm water it can be wholly or partially pumped off and cold fresh water supplied to the wash tub.
- the fresh water is heated by contact with the warm wash items and possibly by mixing with warm water remaining from the cleaning cycle.
- the thermal capacity can be derived by means of a calorimetric calculation from the temperature and amount of fresh water supplied, possibly the quantity and temperature of the fresh water remaining from the cleaning cycle, and the mixing temperature. This data can also be obtained in a technically simple manner—in some cases using means already present, i.e. with a low degree of technical complexity.
- a time dependence of a temperature indicative of the temperature of the wash items themselves and/or the time dependence of a temperature indicative of the temperature of a condensation surface are captured.
- the time dependence of the temperature of the wash items or condensation surface is to be understood as meaning the temperature trend.
- the humidity in the wash tub during cooling as part of a drying process is formed on the condensation surface.
- determining the temperature on the condensation surface provides a capturing possibility that is both simple and independent of the wash liquor and circulating pump or rather its performance data.
- the invention therefore makes use of the recognition that the trend of the wash item temperature, i.e. its change over a particular time period, is directly correlated to the thermal capacity and temperature of the wash items. This provides a technically simple calculation method for indirectly determining, or rather estimating within tight limits, the per se difficult to detect size of the thermal capacity.
- a fit function describing the time dependence of the temperature during cooling or mixing can be matched to the time dependence during cooling or mixing, said fit function having the thermal capacity of the wash items as a fit parameter.
- the thermal capacity of the wash items can also be determined in a simple manner as a measure for the load in this way.
- the invention also relates to a water-bearing domestic appliance, in particular a dishwasher, at least having means for detecting the load-related ability to store thermal energy.
- the water-bearing domestic appliance has means for measuring a temperature trend during cooling of the wash items. The current load is determined automatically, i.e. without operator input, thereby considerably simplifying the operation of the dishwasher.
- the load can be detected indirectly by determining the thermal capacity of the wash items.
- the dishwasher can incorporate a temperature sensor for capturing a temperature indicative of the wash items, and means for evaluating the captured temperature and/or its time dependence.
- the temperature sensor can be disposed in the washing compartment or in the circulation path and comes into contact with water circulated during a cleaning cycle, said water in turn being in heat-exchanging contact with the wash items. It must therefore be disposed such that it can at least indirectly capture the temperature of the wash items.
- a second temperature sensor with associated evaluation means for measuring the temperature of freshly supplied, not yet heated fresh water can also be provided. In the case of dishwashers of the type incorporating a heat store, the second temperature sensor can be in heat-exchanging contact with the heat store. The second temperature sensor and the evaluation means enable the thermal capacity of the load to be determined according the method last described above.
- the dishwasher can incorporate a control unit which is designed to process the data of the temperature sensor(s), i.e. carry out the above described method or sections thereof and their variants.
- FIG. 1 shows a temperature trend in the tub of a dishwasher
- FIG. 2 shows a segment of such a temperature trend for different loads
- FIG. 3 shows a schematic sectional view of a first dishwasher
- FIG. 4 shows a schematic sectional view of another dishwasher.
- FIG. 1 shows the known cycles in a dishwasher with residual heat drying. These comprise a pre-wash 2 , a heat-up phase 4 , a cleaning cycle 6 , an intermediate wash cycle 8 , a rinse 10 , and a drying cycle 12 completing this sequence of operations.
- pre-wash 2 cold fresh water (approx. 3.4-3.9 l) is supplied and circulated through the wash tub 14 (see FIGS. 3 and 4 ) for a predetermined time of approx. 15 min by a circulating pump 20 .
- a heater 56 in the hydraulic circuit heats up the fresh water of the pre-wash 2 in approx. 13 to 14 min to an initial cleaning temperature of approx. 51° C. This also heats up the wash items 28 in the tub 14 .
- the heated wash liquor provided with detergent is circulated, thereby essentially cleaning the wash items 28 .
- the wash liquor is pumped out of the tub 14 and clean, cold fresh water is supplied.
- the fresh water is circulated for a period of approx. 5 min, heating up as it does so primarily due to contact with or rather heat transfer from the wash items 28 still warm from the cleaning cycle 6 and possibly a heat exchanger 38 ( FIG. 4 ).
- the intermediate wash water is pumped out of the tub 14 and cold fresh water is re-supplied.
- the cold fresh water supplied is circulated in the rinse cycle 10 for a predetermined, fixed time of e.g. approximately 15 min during which it is heated to the initial temperature T o for the final drying cycle 12 , e.g. to approx. 65° C., using a predetermined, fixed heating power.
- FIG. 2 illustrates the trend over time of the characteristic temperature, i.e. the time dependence of the temperature in the tub for different loads during the rinse 10 and drying cycle 12 .
- the middle curve in FIG. 2 shows the temperature trend in the tub for a defined standard load B standard .
- the less than proportional temperature rise shown in FIG. 2 is the result of heat transfer losses through the walls of the tub 14 and the loading door 16 , among other things.
- the temperature during the heat-up phase in the rinse 10 is adjusted to an initial temperature T 0,standard according to the middle curve in FIG. 2 .
- T 0 initial temperature
- the residual heat drying cycle 12 i.e. the complete evaporation of the water film on the wash items. If a higher or lower load was detected, a correspondingly larger or smaller heat energy input is required for residual heat drying. Accordingly, the temperature during the heat-up phase is set to a higher or lower initial temperature T o -FAT or T o -AT for the residual heat drying cycle 12 .
- the drying cycle 12 begins.
- the temperature in the tub essentially follows a falling exponential function during which a film of moisture present on the wash items 28 evaporates and condenses on a condensation surface.
- a temperature T 12 is reached which then changes only insignificantly and marks the attainment of an essentially asymptotic state.
- the film of moisture on the wash items 28 is then completely evaporated and the drying process 12 can be terminated.
- time t 12 is dependent on the load, its detection is critically important for controlling the drying process in respect of energy input and time trend.
- the time dependence T 1 ( t ) of an actual temperature T 1 in the tub during the cool-down phase of the cleaning cycle 6 i.e. the temperature trend over time t, is captured. From this is obtained the thermal capacity of the load as a measure for the actual load B act .
- the time dependence T 1 ( t ) of the temperature during the cool-down phase essentially follows an exponential function in time t
- C tot C(B act )+C(water) is the total thermal capacity which is understood as being the sum of the thermal capacity C(B act ) of the current load B act and the thermal capacity C(water) of the circulated water.
- t 0 is the time at which the cool-down phase begins.
- the thermal capacity C(water) of the circulated wash liquor depends on the admitted amount of water which is measured when the tub is filled with fresh water.
- the total thermal capacity C tot is determined by matching a fit function to the cool-down curve T 1 ( t ) with C tot as the fit parameter.
- the change in thermal capacity C(B act ) due to the current load B act is calculated by subtracting the measured thermal capacity C(water) from the thermal capacity C tot derived from the cool-down curve T 1 ( t ).
- the mixing temperature obtaining in the intermediate wash cycle 8 is measured.
- a function is matched by fitting to the time dependence of the temperature measured in the intermediate wash cycle 8 , and the mixing temperature obtaining after the supply of the cold fresh water at the start of the intermediate wash cycle 8 due to temperature equalization with the wash items 28 still warm from the cleaning cycle 6 is determined as an asymptotic approximation to the temperature-time dependence in the intermediate wash cycle 8 using known mathematic equations or models for calorimetric temperature mixing.
- the dishwasher shown in FIG. 3 comprises a tub 14 in which the wash items 28 are placed in a dish rack 30 , a loading door 16 attached to the tub 14 , a rotary water spray arm 24 pivotally disposed in the tub 14 , a circulating pump 20 disposed below a base wall 19 of the tub 14 for circulating the wash liquor, a feed 22 a connecting the circulating pump 20 to the spray arm 24 , a drain 22 b in the base wall 19 of the tub 14 which is connected to the suction side of the circulating pump 20 , a heater 56 on the feed 22 a for heating up the circulated water, a first temperature sensor 32 and a second temperature sensor 34 , a control unit 58 for controlling the cycles and devices of the dishwasher and for reading and evaluating the measurement signals of the temperature sensors 32 , 34 , a supply pipe 48 for supplying fresh water, a drain pipe 52 for removing used wash liquor, and a heating device 56 on the feed 22 a with a control line 56 s to the control unit 58 .
- the first temperature sensor 32 is disposed in the circulating pump 20 and is used to capture the temperature T 1 of the water or rather wash liquor in the circulation path. However, it can also be disposed in other positions in the circulation path, such as in the feed 22 a , in the drain 22 b or in a recess in the base wall of the tub 14 near the opening of the drain 22 b .
- the second temperature sensor 34 is disposed in contact with the inside wall, i.e. the wall of the loading door 16 facing the tub 14 , and is used for measuring a reference temperature T 2 indicative of the temperature of a cold surface in the tub 14 . It can also be disposed, for example, in a control panel 18 in the loading temperature 16 (sic).
- the temperature sensor 32 in the circulating pump 20 captures a temperature trend of the wash liquor over time and forwards the data to the control device 58 .
- the temperature of the wash liquor is determined, on the one hand, by the output temperature of the fresh water from the domestic supply pipe. As the fresh water first passes into the circulating pump 20 before it is pumped further, the sensor 32 is able to capture its temperature. The heating power subsequently supplied to the fresh water is likewise known. Largely constant or of at least only relatively slight effect are the energy losses via the line 22 a and the walls of the tub 14 .
- the control device 58 can therefore determine the temperature of the wash liquor when it enters the tub 14 before it comes into contact with the wash items 28 .
- the temperature of the wash items 28 on which the wash liquor can be heated or cooled is also affecting the temperature of the wash liquor.
- the control device 58 can infer the degree of loading of the tub 14 both from the captured temperature difference between the wash liquor flowing into and out of the tub 14 and from the change in said temperature difference over time. For a smaller amount of wash items 28 , a lower thermal capacity is present in the tub 14 , which means that the wash liquor is cooled less. The wash items 28 therefore heat up more quickly, thereby enabling the heat-up phase 4 to be shortened or the power of the heater 56 to be reduced. Conversely, for a larger load it is necessary to extend the heat-up phase 4 or increase the heating power.
- a second temperature sensor 34 can be mounted in or on the loading door 16 .
- the loading door 16 constitutes a relatively cool condensation surface in the residual heat drying cycle 12 .
- the wash items 28 heated up in the preceding rinse 10 evaporate the moisture adhering thereto which forms on the loading door 16 as a cool condensation surface.
- the trend of the temperature of the condensation surface is also an indication of the degree of loading of the tub 14 , as a larger amount of wash items 28 can bind a correspondingly larger amount of moisture on their surface.
- the subsequent condensation delivers more heat to the condensation surface of the loading door 16 than a smaller load can.
- the second embodiment of the dishwasher shown in FIG. 4 differs from the first embodiment shown in FIG. 3 in that it has a water reservoir 38 used as a heat store. Identical elements of the first and second embodiment are denoted by the same reference characters.
- the dishwasher shown in FIG. 4 comprises the supply pipe 48 provided with the controllable valve 50 for filling the heat exchanger 38 with fresh water and a connecting pipe 40 between the heat exchanger 38 and the circulating pump 20 , and also a third temperature sensor 36 disposed in the reservoir 38 for recording the temperature T 3 of the water in the reservoir 38 .
- the connecting pipe 40 is opened and closed by the controllable connecting valve 42 .
- the valve 42 can be controlled via a line 42 s to the control unit 58 . If the valve 42 is closed and the valve 50 is open, the reservoir 38 is filled with cold fresh water. If the valve settings are reversed, it is filled with water from the circulation path which can be heated if necessary.
- the reservoir 38 is implemented in the form of a container disposed parallel to the sidewall of the tub 14 and abutting said sidewall.
- the third temperature sensor 36 is disposed in contact with the wall of the reservoir 38 facing the tub 14 .
- the reservoir 38 is filled with cold fresh water during the drying cycle 12 , which means that the sidewall of the tub 14 facing the reservoir 38 becomes a cooled condensation surface.
- the temperature sensor 36 fulfills the same purpose as the sensor 34 in the last described example. However, as it is only in the fresh water flow of the circulating pump 20 , it can capture the output temperature of the fresh water more precisely than the temperature sensor 32 . Consequently, it provides a better data set for load determination by the control unit 58 .
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Abstract
Description
- The invention relates to a method as claimed in the preamble of claim 1.
- In water-bearing domestic appliances such as dishwashers, the thermal behavior of said appliances varies as a function of the amount and type of wash items, i.e. the items loaded cause a change in thermal capacity, with the result that, for example, the duration of cooling or drying processes is extended or reduced.
- WO 2004/047608 A1 discloses a method for detecting the amount of items in the washing compartment (tub) of a dishwasher, wherein both motor operating data of a circulating pump and the so-called heating gradient in the dishwasher are recorded at least in a pre-wash phase and in a heating phase. The actual values captured are compared with the stored setpoint values and the amount of items in the washing compartment is inferred therefrom. The wash program can then be adapted to suit the amount of items ascertained. This method requires a high degree of open- and closed-loop control complexity, as a large number of curve or measurement data scenarios must be stored in a program control unit and compared with the captured values for the setpoint/actual comparison. In addition, the heating power of a dishwasher depends on the locally available electricity supply voltage, with the result that variations in the locally available supply voltage can falsify the measurement result.
- The object of the invention is therefore to provide an improved method.
- The object of the invention is achieved by a method for detecting the load-related change in thermal capacity of a water-bearing domestic appliance, in particular a dishwasher, to optimize a drying process.
- It is provided according to the invention that a temperature trend during cooling of the wash items is captured. For example, during the main cleaning cycle, the temperature of the cooling wash liquor, which is in temperature equilibrium with the wash items, is measured. Because a large load cools down more slowly than a small one, the captured temperature trend of the wash liquor can be used as a measure for the load. It can be captured in a technically simple manner via a temperature sensor, because the sensor can be incorporated in the circulation path without great technical complexity. Alternatively or in addition, the temperature trend can be captured on a condensation surface, e.g. on the inside of a door or on the outside of a water tank used as a container for temporarily storing water and/or wash liquor. Advantageously, in both variants for determining the temperature trend, pairs of temperature values are captured at two different locations in the appliance. A first value can be determined in an area upstream of the wash items, and a second downstream thereof. A temperature difference e.g. of the wash liquor can therefore be obtained from values before and after contact with the wash items. The change in thermal capacity due to the wash items can be determined from the change in the difference. Similarly, the correlation between temperature trend and thermal capacity also applies to measuring a temperature on the condensation surface.
- In another embodiment of the invention it is provided that the temperature trend is captured after mixing of wash liquor with fresh water, i.e. the change in thermal capacity due to the load is determined calorimetrically by measuring a mixing temperature from one of the two temperature values in the event of a change or at least partial change in the wash liquor. This can take place, for example, during the cleaning cycle or an intermediate wash cycle. On completion of a first cleaning cycle with warm water, it can be wholly or partially pumped off and cold fresh water supplied to the wash tub. The fresh water is heated by contact with the warm wash items and possibly by mixing with warm water remaining from the cleaning cycle. Disregarding the temperature of the wash items prior to the supply of fresh water, the thermal capacity can be derived by means of a calorimetric calculation from the temperature and amount of fresh water supplied, possibly the quantity and temperature of the fresh water remaining from the cleaning cycle, and the mixing temperature. This data can also be obtained in a technically simple manner—in some cases using means already present, i.e. with a low degree of technical complexity.
- Such a procedure would not be convenient. In an advantageous embodiment of the invention, a time dependence of a temperature indicative of the temperature of the wash items themselves and/or the time dependence of a temperature indicative of the temperature of a condensation surface are captured. The time dependence of the temperature of the wash items or condensation surface is to be understood as meaning the temperature trend. The humidity in the wash tub during cooling as part of a drying process is formed on the condensation surface. In particular, determining the temperature on the condensation surface provides a capturing possibility that is both simple and independent of the wash liquor and circulating pump or rather its performance data. The invention therefore makes use of the recognition that the trend of the wash item temperature, i.e. its change over a particular time period, is directly correlated to the thermal capacity and temperature of the wash items. This provides a technically simple calculation method for indirectly determining, or rather estimating within tight limits, the per se difficult to detect size of the thermal capacity.
- In the above mentioned embodiments, a fit function describing the time dependence of the temperature during cooling or mixing can be matched to the time dependence during cooling or mixing, said fit function having the thermal capacity of the wash items as a fit parameter. The thermal capacity of the wash items can also be determined in a simple manner as a measure for the load in this way.
- In addition to measuring the temperature trend during a cool-down phase and/or of a mixing temperature, it can preferably also be provided to capture the temperature trend during a wash liquor heat-up phase, particularly of re-circulated wash liquor, in order thus to increase the accuracy by combining these measurements.
- The invention also relates to a water-bearing domestic appliance, in particular a dishwasher, at least having means for detecting the load-related ability to store thermal energy. According to the invention, the water-bearing domestic appliance has means for measuring a temperature trend during cooling of the wash items. The current load is determined automatically, i.e. without operator input, thereby considerably simplifying the operation of the dishwasher.
- According to the invention, the load can be detected indirectly by determining the thermal capacity of the wash items. To determine the thermal capacity, the dishwasher can incorporate a temperature sensor for capturing a temperature indicative of the wash items, and means for evaluating the captured temperature and/or its time dependence. The temperature sensor can be disposed in the washing compartment or in the circulation path and comes into contact with water circulated during a cleaning cycle, said water in turn being in heat-exchanging contact with the wash items. It must therefore be disposed such that it can at least indirectly capture the temperature of the wash items. A second temperature sensor with associated evaluation means for measuring the temperature of freshly supplied, not yet heated fresh water can also be provided. In the case of dishwashers of the type incorporating a heat store, the second temperature sensor can be in heat-exchanging contact with the heat store. The second temperature sensor and the evaluation means enable the thermal capacity of the load to be determined according the method last described above.
- The dishwasher can incorporate a control unit which is designed to process the data of the temperature sensor(s), i.e. carry out the above described method or sections thereof and their variants.
- The principle of the invention will now be explained in greater detail using examples and with reference to the accompanying drawings in which:
-
FIG. 1 : shows a temperature trend in the tub of a dishwasher, -
FIG. 2 : shows a segment of such a temperature trend for different loads, -
FIG. 3 : shows a schematic sectional view of a first dishwasher, and -
FIG. 4 : shows a schematic sectional view of another dishwasher. -
FIG. 1 shows the known cycles in a dishwasher with residual heat drying. These comprise a pre-wash 2, a heat-upphase 4, acleaning cycle 6, anintermediate wash cycle 8, arinse 10, and adrying cycle 12 completing this sequence of operations. In the pre-wash 2, cold fresh water (approx. 3.4-3.9 l) is supplied and circulated through the wash tub 14 (seeFIGS. 3 and 4 ) for a predetermined time of approx. 15 min by a circulatingpump 20. A heater 56 (seeFIGS. 3 and 4 ) in the hydraulic circuit heats up the fresh water of the pre-wash 2 in approx. 13 to 14 min to an initial cleaning temperature of approx. 51° C. This also heats up the wash items 28 in thetub 14. In thesubsequent cleaning cycle 6, the heated wash liquor provided with detergent is circulated, thereby essentially cleaning the wash items 28. - Between the
cleaning cycle 6 and theintermediate wash cycle 8, the wash liquor is pumped out of thetub 14 and clean, cold fresh water is supplied. During theintermediate wash cycle 8, the fresh water is circulated for a period of approx. 5 min, heating up as it does so primarily due to contact with or rather heat transfer from the wash items 28 still warm from thecleaning cycle 6 and possibly a heat exchanger 38 (FIG. 4 ). For the change from theintermediate wash cycle 8 to thesubsequent rinse 10, the intermediate wash water is pumped out of thetub 14 and cold fresh water is re-supplied. - In conventional dishwashers with residual heat drying, the cold fresh water supplied is circulated in the
rinse cycle 10 for a predetermined, fixed time of e.g. approximately 15 min during which it is heated to the initial temperature To for thefinal drying cycle 12, e.g. to approx. 65° C., using a predetermined, fixed heating power. -
FIG. 2 illustrates the trend over time of the characteristic temperature, i.e. the time dependence of the temperature in the tub for different loads during therinse 10 anddrying cycle 12. The middle curve inFIG. 2 shows the temperature trend in the tub for a defined standard load Bstandard. The upper and lower curves inFIG. 2 represent the temperature trend in the tub for a (compared to the standard load Bstandard) higher load B+:=Bstandard+AB and lower load B−:=Bstandard−ΔB respectively. Due to the supply of heat energy, the temperature in thetub 14, and therefore also the temperature of the wash items 28, increases essentially proportionally to the time t during the rinse 10. The less than proportional temperature rise shown inFIG. 2 is the result of heat transfer losses through the walls of thetub 14 and theloading door 16, among other things. - For the standard load Bstandard, the temperature during the heat-up phase in the rinse 10 is adjusted to an initial temperature T0,standard according to the middle curve in
FIG. 2 . Immediately thereafter there commences the residualheat drying cycle 12, i.e. the complete evaporation of the water film on the wash items. If a higher or lower load was detected, a correspondingly larger or smaller heat energy input is required for residual heat drying. Accordingly, the temperature during the heat-up phase is set to a higher or lower initial temperature To-FAT or To-AT for the residualheat drying cycle 12. - With the removal of the heating power supplied to the circulated wash liquor during the rinse 10, the drying
cycle 12 begins. The temperature in the tub essentially follows a falling exponential function during which a film of moisture present on the wash items 28 evaporates and condenses on a condensation surface. At a time t12, as a characteristic feature, a temperature T12 is reached which then changes only insignificantly and marks the attainment of an essentially asymptotic state. The film of moisture on the wash items 28 is then completely evaporated and thedrying process 12 can be terminated. As the reaching of time t12 is dependent on the load, its detection is critically important for controlling the drying process in respect of energy input and time trend. - According to the invention, the time dependence T1(t) of an actual temperature T1 in the tub during the cool-down phase of the
cleaning cycle 6, i.e. the temperature trend over time t, is captured. From this is obtained the thermal capacity of the load as a measure for the actual load Bact. The time dependence T1(t) of the temperature during the cool-down phase essentially follows an exponential function in time t -
T1(t)≈e −ctot ·(t-t0 ) (1) - where Ctot=C(Bact)+C(water) is the total thermal capacity which is understood as being the sum of the thermal capacity C(Bact) of the current load Bact and the thermal capacity C(water) of the circulated water. t0 is the time at which the cool-down phase begins. The thermal capacity C(water) of the circulated wash liquor depends on the admitted amount of water which is measured when the tub is filled with fresh water. The total thermal capacity Ctot is determined by matching a fit function to the cool-down curve T1(t) with Ctot as the fit parameter. Finally, the change in thermal capacity C(Bact) due to the current load Bact is calculated by subtracting the measured thermal capacity C(water) from the thermal capacity Ctot derived from the cool-down curve T1(t).
- According to an alternative embodiment of the invention for determining the change in thermal capacity due to the load, the mixing temperature obtaining in the
intermediate wash cycle 8 is measured. For this purpose, a function is matched by fitting to the time dependence of the temperature measured in theintermediate wash cycle 8, and the mixing temperature obtaining after the supply of the cold fresh water at the start of theintermediate wash cycle 8 due to temperature equalization with the wash items 28 still warm from the cleaningcycle 6 is determined as an asymptotic approximation to the temperature-time dependence in theintermediate wash cycle 8 using known mathematic equations or models for calorimetric temperature mixing. - The dishwasher shown in
FIG. 3 comprises atub 14 in which the wash items 28 are placed in adish rack 30, aloading door 16 attached to thetub 14, a rotarywater spray arm 24 pivotally disposed in thetub 14, a circulatingpump 20 disposed below abase wall 19 of thetub 14 for circulating the wash liquor, afeed 22 a connecting the circulatingpump 20 to thespray arm 24, adrain 22 b in thebase wall 19 of thetub 14 which is connected to the suction side of the circulatingpump 20, aheater 56 on thefeed 22 a for heating up the circulated water, afirst temperature sensor 32 and asecond temperature sensor 34, acontrol unit 58 for controlling the cycles and devices of the dishwasher and for reading and evaluating the measurement signals of thetemperature sensors supply pipe 48 for supplying fresh water, adrain pipe 52 for removing used wash liquor, and aheating device 56 on thefeed 22 a with acontrol line 56 s to thecontrol unit 58. - The
first temperature sensor 32 is disposed in the circulatingpump 20 and is used to capture the temperature T1 of the water or rather wash liquor in the circulation path. However, it can also be disposed in other positions in the circulation path, such as in thefeed 22 a, in thedrain 22 b or in a recess in the base wall of thetub 14 near the opening of thedrain 22 b. Thesecond temperature sensor 34 is disposed in contact with the inside wall, i.e. the wall of theloading door 16 facing thetub 14, and is used for measuring a reference temperature T2 indicative of the temperature of a cold surface in thetub 14. It can also be disposed, for example, in acontrol panel 18 in the loading temperature 16 (sic). - The
temperature sensor 32 in the circulatingpump 20 captures a temperature trend of the wash liquor over time and forwards the data to thecontrol device 58. The temperature of the wash liquor is determined, on the one hand, by the output temperature of the fresh water from the domestic supply pipe. As the fresh water first passes into the circulatingpump 20 before it is pumped further, thesensor 32 is able to capture its temperature. The heating power subsequently supplied to the fresh water is likewise known. Largely constant or of at least only relatively slight effect are the energy losses via theline 22 a and the walls of thetub 14. Thecontrol device 58 can therefore determine the temperature of the wash liquor when it enters thetub 14 before it comes into contact with the wash items 28. - Also affecting the temperature of the wash liquor is the temperature of the wash items 28 on which the wash liquor can be heated or cooled. When the wash liquor is repeatedly circulated e.g. during the heat-up phase 4 (cf.
FIG. 1 ), after each discharge from thetub 14 the liquor acquires a lower temperature than it had in thefeed pipe 22 a because it is cooled on the wash items 28. Thecontrol device 58 can infer the degree of loading of thetub 14 both from the captured temperature difference between the wash liquor flowing into and out of thetub 14 and from the change in said temperature difference over time. For a smaller amount of wash items 28, a lower thermal capacity is present in thetub 14, which means that the wash liquor is cooled less. The wash items 28 therefore heat up more quickly, thereby enabling the heat-upphase 4 to be shortened or the power of theheater 56 to be reduced. Conversely, for a larger load it is necessary to extend the heat-upphase 4 or increase the heating power. - Alternatively or additionally, namely to improve the data set of the
control unit 58 for determining the load, asecond temperature sensor 34 can be mounted in or on theloading door 16. Theloading door 16 constitutes a relatively cool condensation surface in the residualheat drying cycle 12. The wash items 28 heated up in the preceding rinse 10 evaporate the moisture adhering thereto which forms on theloading door 16 as a cool condensation surface. The trend of the temperature of the condensation surface is also an indication of the degree of loading of thetub 14, as a larger amount of wash items 28 can bind a correspondingly larger amount of moisture on their surface. The subsequent condensation delivers more heat to the condensation surface of theloading door 16 than a smaller load can. - The second embodiment of the dishwasher shown in
FIG. 4 differs from the first embodiment shown inFIG. 3 in that it has awater reservoir 38 used as a heat store. Identical elements of the first and second embodiment are denoted by the same reference characters. - The dishwasher shown in
FIG. 4 comprises thesupply pipe 48 provided with thecontrollable valve 50 for filling theheat exchanger 38 with fresh water and a connectingpipe 40 between theheat exchanger 38 and the circulatingpump 20, and also athird temperature sensor 36 disposed in thereservoir 38 for recording the temperature T3 of the water in thereservoir 38. The connectingpipe 40 is opened and closed by the controllable connectingvalve 42. Thevalve 42 can be controlled via aline 42 s to thecontrol unit 58. If thevalve 42 is closed and thevalve 50 is open, thereservoir 38 is filled with cold fresh water. If the valve settings are reversed, it is filled with water from the circulation path which can be heated if necessary. - The
reservoir 38 is implemented in the form of a container disposed parallel to the sidewall of thetub 14 and abutting said sidewall. Thethird temperature sensor 36 is disposed in contact with the wall of thereservoir 38 facing thetub 14. To improve the heat drying efficiency, thereservoir 38 is filled with cold fresh water during the dryingcycle 12, which means that the sidewall of thetub 14 facing thereservoir 38 becomes a cooled condensation surface. On the one hand, therefore, thetemperature sensor 36 fulfills the same purpose as thesensor 34 in the last described example. However, as it is only in the fresh water flow of the circulatingpump 20, it can capture the output temperature of the fresh water more precisely than thetemperature sensor 32. Consequently, it provides a better data set for load determination by thecontrol unit 58. -
- 2 pre-wash
- 4 heat-up phase/heat up
- 6 cleaning cycle/clean
- 8 intermediate wash cycle/intermediate wash
- 10 rinse
- 12 drying cycle/drying
- 14 tub
- 16 loading door
- 18 control panel
- 19 base plate
- 20 circulating pump
- 20 s control line for circulating pump
- 22 a feed
- 22 b drain
- 24 rotary spray arm
- 28 wash items
- 30 dish rack
- 32 first temperature sensor (circulation path)
- 34 second temperature sensor condensation surface (e.g. loading door)
- 36 third temperature sensor (heat exchanger)
- 38 heat exchanger
- 40 connecting pipe
- 42 connecting valve
- 42 s control line for connecting valve
- 44 supply
- 48 supply pipe
- 52 drain pipe
- 56 heater
- 56 s control line for heater
- 58 control unit
Claims (11)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007059517.6 | 2007-12-11 | ||
DE102007059517A DE102007059517A1 (en) | 2007-12-11 | 2007-12-11 | Method for detecting a load-related heat capacity change of a water-conducting household appliance |
PCT/EP2008/065295 WO2009074415A1 (en) | 2007-12-11 | 2008-11-11 | Method for detecting a load-related change in thermal capacity of a water-bearing domestic appliance |
Publications (1)
Publication Number | Publication Date |
---|---|
US20100258145A1 true US20100258145A1 (en) | 2010-10-14 |
Family
ID=40227548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/745,699 Abandoned US20100258145A1 (en) | 2007-12-11 | 2008-11-11 | Method for detecting a load-related change in thermal capacity of a water-bearing domestic appliance |
Country Status (7)
Country | Link |
---|---|
US (1) | US20100258145A1 (en) |
EP (1) | EP2230984B1 (en) |
CN (1) | CN101896111B (en) |
DE (1) | DE102007059517A1 (en) |
ES (1) | ES2400151T3 (en) |
PL (1) | PL2230984T3 (en) |
WO (1) | WO2009074415A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110048472A1 (en) * | 2009-09-03 | 2011-03-03 | Bsh Bosch Und Siemens Hausgerate Gmbh | Dishwasher |
US20110114133A1 (en) * | 2008-07-25 | 2011-05-19 | BSH Bosch und Siemens Hausgeräte GmbH | Washing method for a dishwashing machine |
US9078555B2 (en) | 2009-09-02 | 2015-07-14 | Bsh Bosch Und Siemens Hausgeraete Gmbh | Dishwasher and method for operating a dishwasher |
US20170119232A1 (en) * | 2014-06-27 | 2017-05-04 | Electrolux Appliances Aktiebolag | Dishwasher and method of operating the dishwasher |
US9895044B2 (en) | 2012-08-28 | 2018-02-20 | Whirlpool Corporation | Dishwasher with controlled dry cycle |
US20190133412A1 (en) * | 2017-11-06 | 2019-05-09 | Haier Us Appliance Solutions, Inc. | Heating assembly for a washing appliance |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5126301B2 (en) * | 2010-06-25 | 2013-01-23 | パナソニック株式会社 | dishwasher |
DE102013102157B4 (en) * | 2013-03-05 | 2015-02-19 | Miele & Cie. Kg | Method for operating a dishwasher equipped with a heat pump device |
DK2848180T3 (en) * | 2014-05-20 | 2016-08-22 | V-Zug Ag | Dishwasher with the cooled vessel wall |
CN105286742B (en) * | 2015-10-22 | 2018-05-01 | 佛山市顺德区美的洗涤电器制造有限公司 | The detection method and device of dish-washing machine and its tableware weight |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4013543A1 (en) * | 1990-04-27 | 1991-10-31 | Miele & Cie | Registering residual running time of drying process - in program-controlled laundry dryer by switching off heating source for short time |
JPH0518650A (en) * | 1991-07-09 | 1993-01-26 | Matsushita Refrig Co Ltd | Controlling device for refrigerated-cold storage cabinet |
JP2523752B2 (en) * | 1988-01-25 | 1996-08-14 | 松下電器産業株式会社 | Dishwasher |
CA2187993A1 (en) * | 1995-10-17 | 1997-04-18 | Katharina Kohler | Process for operating a dishwasher |
US5669983A (en) * | 1995-06-08 | 1997-09-23 | Maytag Corporation | Enhanced cycles for an automatic appliance |
US6122840A (en) * | 1998-11-18 | 2000-09-26 | General Electric Company | Systems and methods for determining drying time for a clothes dryer |
US6622754B1 (en) * | 2001-12-19 | 2003-09-23 | Whirlpool Corporation | Load-based dishwashing cycle |
US6694990B2 (en) * | 2001-10-15 | 2004-02-24 | General Electric Company | Dishwasher variable dry cycle apparatus |
US20060130876A1 (en) * | 2002-11-27 | 2006-06-22 | Bsh Bosch Und Siemens Hausgerate, Gmbh | Method for detecting the quantity of dishes in the washing container of a dishwasher and dishwasher for carrying out said method |
JP2006204592A (en) * | 2005-01-28 | 2006-08-10 | Rinnai Corp | Dishwasher |
US20060236556A1 (en) * | 2005-04-25 | 2006-10-26 | Viking Range Corporation | Dishwasher drying system |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19505552A1 (en) * | 1995-02-18 | 1996-08-22 | Aeg Hausgeraete Gmbh | Method for operating a dishwasher |
KR20050059677A (en) * | 2003-12-15 | 2005-06-21 | 삼성전자주식회사 | Dishwasher and control method thereof |
JP4321366B2 (en) * | 2004-06-07 | 2009-08-26 | パナソニック株式会社 | dishwasher |
JP4201015B2 (en) * | 2006-05-12 | 2008-12-24 | Toto株式会社 | Dishwasher |
DE102006042486B3 (en) * | 2006-09-07 | 2007-11-15 | Miele & Cie. Kg | Washing goods cleaning and drying method for e.g. dishwasher, involves determining air temperature as surrounding variable at installation location of washing machine during utilization of air-air-heat exchanger |
-
2007
- 2007-12-11 DE DE102007059517A patent/DE102007059517A1/en not_active Withdrawn
-
2008
- 2008-11-11 PL PL08860453T patent/PL2230984T3/en unknown
- 2008-11-11 EP EP08860453A patent/EP2230984B1/en active Active
- 2008-11-11 WO PCT/EP2008/065295 patent/WO2009074415A1/en active Application Filing
- 2008-11-11 CN CN200880120222XA patent/CN101896111B/en active Active
- 2008-11-11 US US12/745,699 patent/US20100258145A1/en not_active Abandoned
- 2008-11-11 ES ES08860453T patent/ES2400151T3/en active Active
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2523752B2 (en) * | 1988-01-25 | 1996-08-14 | 松下電器産業株式会社 | Dishwasher |
DE4013543A1 (en) * | 1990-04-27 | 1991-10-31 | Miele & Cie | Registering residual running time of drying process - in program-controlled laundry dryer by switching off heating source for short time |
JPH0518650A (en) * | 1991-07-09 | 1993-01-26 | Matsushita Refrig Co Ltd | Controlling device for refrigerated-cold storage cabinet |
US5669983A (en) * | 1995-06-08 | 1997-09-23 | Maytag Corporation | Enhanced cycles for an automatic appliance |
CA2187993A1 (en) * | 1995-10-17 | 1997-04-18 | Katharina Kohler | Process for operating a dishwasher |
US6122840A (en) * | 1998-11-18 | 2000-09-26 | General Electric Company | Systems and methods for determining drying time for a clothes dryer |
US6694990B2 (en) * | 2001-10-15 | 2004-02-24 | General Electric Company | Dishwasher variable dry cycle apparatus |
US6622754B1 (en) * | 2001-12-19 | 2003-09-23 | Whirlpool Corporation | Load-based dishwashing cycle |
US20060130876A1 (en) * | 2002-11-27 | 2006-06-22 | Bsh Bosch Und Siemens Hausgerate, Gmbh | Method for detecting the quantity of dishes in the washing container of a dishwasher and dishwasher for carrying out said method |
JP2006204592A (en) * | 2005-01-28 | 2006-08-10 | Rinnai Corp | Dishwasher |
US20060236556A1 (en) * | 2005-04-25 | 2006-10-26 | Viking Range Corporation | Dishwasher drying system |
Non-Patent Citations (3)
Title |
---|
Abstract of JP05-018650 to Kurakake * |
Machine translation of DE 4013543A1 dated 10-1991 * |
Machine translation of JP2006-204592A dated 08-2006 * |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110114133A1 (en) * | 2008-07-25 | 2011-05-19 | BSH Bosch und Siemens Hausgeräte GmbH | Washing method for a dishwashing machine |
US9364133B2 (en) | 2008-07-25 | 2016-06-14 | BSH Hausgeräte GmbH | Washing method for a dishwashing machine |
US9078555B2 (en) | 2009-09-02 | 2015-07-14 | Bsh Bosch Und Siemens Hausgeraete Gmbh | Dishwasher and method for operating a dishwasher |
US20110048472A1 (en) * | 2009-09-03 | 2011-03-03 | Bsh Bosch Und Siemens Hausgerate Gmbh | Dishwasher |
US9895044B2 (en) | 2012-08-28 | 2018-02-20 | Whirlpool Corporation | Dishwasher with controlled dry cycle |
US10506907B2 (en) | 2012-08-28 | 2019-12-17 | Whirlpool Corporation | Dishwasher with controlled dry cycle |
US20170119232A1 (en) * | 2014-06-27 | 2017-05-04 | Electrolux Appliances Aktiebolag | Dishwasher and method of operating the dishwasher |
US11076742B2 (en) * | 2014-06-27 | 2021-08-03 | Electrolux Appliances Aktiebolag | Dishwasher and method of operating the dishwasher |
US20190133412A1 (en) * | 2017-11-06 | 2019-05-09 | Haier Us Appliance Solutions, Inc. | Heating assembly for a washing appliance |
Also Published As
Publication number | Publication date |
---|---|
CN101896111B (en) | 2013-01-09 |
DE102007059517A1 (en) | 2009-06-18 |
CN101896111A (en) | 2010-11-24 |
EP2230984A1 (en) | 2010-09-29 |
ES2400151T3 (en) | 2013-04-05 |
EP2230984B1 (en) | 2013-01-09 |
PL2230984T3 (en) | 2013-06-28 |
WO2009074415A1 (en) | 2009-06-18 |
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