GB2199676A - Tableware washer control - Google Patents
Tableware washer control Download PDFInfo
- Publication number
- GB2199676A GB2199676A GB08730286A GB8730286A GB2199676A GB 2199676 A GB2199676 A GB 2199676A GB 08730286 A GB08730286 A GB 08730286A GB 8730286 A GB8730286 A GB 8730286A GB 2199676 A GB2199676 A GB 2199676A
- Authority
- GB
- United Kingdom
- Prior art keywords
- washing
- detecting
- water
- humidity
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
- A47L15/4293—Arrangements for programme selection, e.g. control panels; Indication of the selected programme, programme progress or other parameters of the programme, e.g. by using display panels
-
- 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
- A47L15/4297—Arrangements for detecting or measuring the condition of the washing water, e.g. turbidity
-
- 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
- A47L15/46—Devices for the automatic control of the different phases of cleaning ; Controlling devices
-
- 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
- A47L2401/09—Water level
-
- 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
- A47L2401/10—Water cloudiness or dirtiness, e.g. turbidity, foaming or level of bacteria
-
- 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
-
- 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
- A47L2401/19—Air humidity
-
- 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
- A47L2501/01—Water supply, e.g. opening or closure of the water inlet valve
-
- 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
- A47L2501/02—Water discharge, e.g. opening or closure of discharge valve
-
- 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
- A47L2501/05—Drain or recirculation pump, e.g. regulation of the pump rotational speed or flow direction
-
- 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
- A47L2501/06—Water 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
- A47L2501/11—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
Landscapes
- Washing And Drying Of Tableware (AREA)
Description
2199676 A14 AUTOMATIC CONTROL CIRCUIT FOR A TABLEWARE WASHER
DESCRIPTION
The present invention relates to an automatic control circuit for a tableware washer having an absolute humidity sensor and a washing sensor associated therewith-,.and.Rq:e particularly to a circuit which is designed to achieve a completely automatic washing-drying process of tableware in such a washer in a proper length of time.
A tableware washer is a device which cleans by washing the used tableware in water and detergent. In general, it takes a series of processing steps: draining, water feeding, washing, draining, rinsing, draining and drying.
Conventional tableware washers are found defective not only for the reason that the user is required to set up and iMput a washing time depending on the extent to which the tableware is made unclean but also for the reason that the user, if not familiar with a washer, fails to effect a complete washing of the tableware by Q 2 - setting up a time shorter than required for complete washing, or wastes electric energy by setting up a time longer than required because it is difficult to set up a proper time for complete washing.
It is an object of the present invention to provide an improved system for automatically carrying out a series of steps from setting up a washing time depending on the extent to which the tableware is made dirty to drying -the-washed tableware by means of a microcomputer which receives input signals from an absolute humidity sensor and a washing sensor.
The present invention will now be described by way of illustrative example with reference to the accompanying drawings, in which Figure 1 is a sectional view showing the tableware washer according to the present invention; Figure 2 is a timing chart for depicting the input or output signals of the microcomputer of Figure 3; Figure 3 is a circuit diagram of the embodiment of the present invention; 1 Figure 4 is a timing chart for depicting the input or output signals of the microcomputer of Figure 3 under normal washing conditions; and Figure 5 is a timing chart for depicting the input or output signals of the microcomputer of Figure 3 when oily tableware is being washed.
----jlicr'"according to the Referring to Figure 1 the tableware present invention includes an absolute humidity sensor HS, a draining valve S, a heater H, a washing sensor L, a washing pump WP, a draining pump DP, water level detecting switches SW1 and SW2 and plate-rack DS.
Referring now to Figure 3, an entire circuit diagram of the embodiment of the present invention is illustrated.
In the embodiment of the present invention, a microcomputer 6 is employed to control the system. More specifically, the micro computer 6 controls entry of data through a key board 8, a washing condition detecting section 3, an absolute humidity detecting section 4, a temperature detecting section 5 and a water level detecting section 7 and outputs control signals to a driving 1 k i section 1 which serves as a load of the microcomputer 6.
The driving section 1 comprises a heater 11 used to heat water in the washer,a solenoid valve S used to feed water into the washer, a washing pump WP for the purpose of washing tableware, a draining pump DP used to drain water contained in the washer to the outside, relays RY1 to RY4 used to control the operation thereof, transistors Q2 to Q5 for driving the relays RY1 to RY4, light-emitting diodes LED1 to LED4 which visuAlly indicate the operation of each thereof, and bias resistors R2 to R13.
D A usual DC power source 2 comprises a switching transistor Q1, a zener diod ZD, a smoothing capacitor Cl and a full-wave rectifier BR.
The washing condition detecting section 3 comprises switching transistors Q6 to Qq, bias resistors R14 to R21, a washing sensor L for detecting the washing condition, coupling capacitors C2 and C3 and a flip-flop FF for wave shatping.
On the other hand, the absolute humidity detecting section 4 comprises an absolute humidity sensor HS which consists of an open thermistor and an airtight thermistor filled up with completely 1 1 t dry air, operational amplifiers OP1 and OP2 for a voltage follower, an operational amplifier OP4, an operational amplifier OP4 for comparator which compares the output voltage of an operational amplifier OP3 with the voltage determined by resistors R27 and R28 and resistors R29 to R33 which calibrate the balance of the absolute humidity sensor HS.
The temperature detecting section 5 comprises a thermistor TH for use in detecting water tempera.ture, an operational amplifier OP5 for a voltage follower and operational amplifiers OP6 and OP7 for comparators having hysteresis characteristics.
Ihe water level detecting section 7 comprises water level detecting switches SW1 and SW2 and pull-down resistors R42 and R'42.
Referring now to Figures 2 to 5, the operation of the embodiment described above is explained hereunder.
When a 'normal washing' or a 'strong washing' key is selected, the Output 04 of the microcomputer 6, as can be seen in the timing chart of Figure 4, goes to the high state.
Ihus, the transistor Q5 for driving the relay RY4 is turned on and thereby the draining pump DP operates. When the draining is almost finished, the water level detecting switch S"2 becomes opens causing the input IS of the microcomputer 6 to be in the low state. Thus, the Output 02 Of the microcomputer 6 jumps to the high state and the contacts of the relay P'Y2 are colsed as the coil of the relay RY2 is energized. When the contacts of the relay RY2 are closed, the solenoid valve S operates by the AC power supply through the contacts and then water is fed into the tableware washer through the valve S. Such water feeding continues until the input 14 Of the microcomputer 6 jumps to the high state by the water level detecting-switch SW, to be turned-on.
D When the input 14 of the microcomputer 6 jumps to the high state, the output 02 Of the microcomputer 6 jumps from the high state to the low state, the contacts of the relay RY2 are open as the realy coil is in its unenergized operating condition, and then the valve S comes to a stop.
Next, as the output 0 3 of the microcomputer 6 jumps to the high state, the relay RY3 coil is energized and the washing pump WP operates thus starting the tableware washing.
On the other hand, if an 'oil washing' key in the key board 8 has i p initially been selected, the washing is performed after the water fed into the washer is heated up to a preset degree by the operation of the heater HT which is controlled by the output 01 of the microcomputer 6 as illustrated in Figure 5. It is possibly to employ two oil washing keys in the key board 8, i. e., a 'normal oil washing' key and a 'strong oil washing' key. Two different temperatures are preset for the two keys respectively and the user can select one of the keys depending on the amount of oil stuck to the tableware.
As the washing proceeds, the water in the washer gets dirty.
So, light emitted by the light-emitting diode LD which constitutes the washing sensor L hardly reaches the lens of the phototratisistor LTR and the phototransistor LTD is accordingly turned off. Thus, the input D of the flip-flop FF goes to the high state and then the output Q of the flip-flop FF, which is connected to the input Of the microcomputer 6, jumps to the low state. When a given -length of time has passed away after the input 15 of the microcom puter 6 is in the low state, the Output 03 Of the microcomputer 6 becomes low and-the washing comes to a stop.
Next, the draining and the water feeding steps as described hereinabove follow in due order-and then the rinsing step starts as shown in Figure 5 under the control of the microcomputer 6.
Meanwhile, the phototransistor LTR in the washing sensor L responds to incidental light from the light-emitting diode LD and becomes turned-on resulting in that the input 15 Of the microcomputer 6 goes to the high state again.
This rinsing continues for a preset time.
After the rinsing is finished, the output 04 of the microcomputer 6 jumps to the high state and thus, the draining continues until the water level detecting switch SW2 is turned on as described hereinabove. After the draining is finished, the output 01 of the microcomputer 6 jumps to the high state and accordingly, the heater H starts its operation to dry out the washed tableware. Such drying will continue until the output or the absolute humidity detecting section 4 goes to the high state.
The absolute humidity sensor HS which consists of an open thermistor and an airtight thermistor forms a bridge circuit together with the resistors R23 and R24 as shown in Figure 3. Two outputs of the bridge circuit are amplified by the voltage followers OP, and OP2 and then, the difference between the two outputs is amplified by the operational amplifier OP3. The output of the operational amplifier OP3 is compared with the voltage determined by the resistors R27 and R28 and by the operational amplifier OP4 the output of which is connected to the input I1 of the microcomputer 6.
During the drying step, moisture comes into contact with the surface of the absolute humidity sensor HS and thus, the resistance value of an open therTnistor becomes greater than that of an airtight thermistor.
10.
As the drying proceeds, the moisture on the surface of the absolute humidity sensor HS is removed gradually by the operation of the heater H and accordingly, the difference between the two output 'voltages of the bridge circuit gets reduced.
Thus, when the resistance value of the open thermistor is almost equal to that of the airtight thermistor, the drying is finished by the control of the microcomputer 6. At this time, the tableware is completely dried out.
Resistors R29 to R33 are for use in adjusting the'initial condition of the absolute humidity sensor HS. The reason that the dual comparators OP6 and OP7 are employed in the -temperature detecting section 5 is to improve washing efficiency by setting the two different temperatures of the washing water depending on the amount of oil stuck to the tableware.
From the foregoing, it will be apparent that the present invention provides the advantages necessary to achieve an completely automatic washing-drying process by one-touch manipulation of a key and also to prevent unnecessary waste of electric energy because adjusting a proper washing-time^is effected by means of an automatic control system.
1 1
Claims (9)
1. An automatic control circuit-for a tableware washer including a microcomputer as its controller, the circuit comprising:
power source driving means receiving-dbntral-signals from said microcomputer, said driving means including a heater for heating water or the inside of said washer, a solenoid valve for feeding water, a washing pump for washing tableware, a draining pump for draining water out, four relays for controlling the operations thereof and four relay driving transistors a washing condition detecting means detecting the washing condition during a washing process a temperature detecting means detecting the temperature of washing water during said washing or a rinsing process; an absolute humidity detecting means detecting the humidity condition inside said washer to complete said drying process; a key board including keys for normal washing, strong washing, normal oil washing and strong oil washing processes and a water level detecting means including two water level detecting switches to control water feeding and draining; characterized in that the automatic washing-drying process is carried out by one-touch manipulation of any key in said key board.
2. Ihe circuit according to claim-1,-wherein said driving means further includes four light-emitting diodes visually displaying the operations of said heater, said solenoid valve, said washing pump and said draining pump.
3. The circuit according to claim 1, wherein said washing condition detecting means includes a washing sensor consisting of a light-emitting diode and a phototransistor for detecting the water condition, switching transistors, and flip-flop for wave sharping, the output of said flip-flop being connected to said microcomputer.
4. The circuit according to claim 1, wherein said absolute humidity detecting means includes a absolute humidity sensor consisting of an open thermistor and an airtight thermistor 1 I; and forming a bridge circuit with resistors, two voltage followers to amplify two outputs of said bridge circuit, a differential amplifier for amplifying the difference between two outputs of said voltage followers, and a voltage comparator comparing the output of said differential amplifier with the predetermined value.
5. the circuit according to claim 1, wherein said temperature detecting means include-s-''a--tl-difflistor for detecting water temperature, a voltage follower and two comparators having hysteresis characteristics.
6. A dishwasher including control means for controlling washing and drying process periods and detector means for detecting the degree of soiling of washing water during the washing process period, said control means being operative to control the length of the washing process period in dependence upon said detected.degree of water soiling.
- 14
7. A dishwasher according to claim 6 including humidity detection means for detecting humidity during the drying process period, said control means being operative to control the length of the drying process period in dependence upon the detected humidity.
8. A dishwasher including control means for controlling washing and drying periods, detector means for detecting the degree of soiling of washing water during the washing period, and humidity detection means for detecting humidity during the drying process period, said control means being operative to control the length of the washing and drying process periods in dependence upons said detected degree of water soiling and said detected humidity respectively.
9. An automatic control circuit for a tableware washer substantially as hereinbefore described with reference to the accompanying drawings.
Published 198a &,, The Patent OffiCe, State House. 6671 High Holborn. London WC1R 4TP Purther copies may be obtained frorn Tile PateDt Office. Sale Brk-h. Rt V- r---- n_------ V-. Salp Rrk-h. Rt V- r---- n---- V-.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR860021953 | 1986-12-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8730286D0 GB8730286D0 (en) | 1988-02-03 |
| GB2199676A true GB2199676A (en) | 1988-07-13 |
Family
ID=19258636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08730286A Withdrawn GB2199676A (en) | 1986-12-30 | 1987-12-30 | Tableware washer control |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE3744559A1 (en) |
| GB (1) | GB2199676A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992009017A1 (en) * | 1990-11-08 | 1992-05-29 | Griverus Bernt | Methods and devices for control of fluidic systems |
| GB2333441A (en) * | 1997-11-14 | 1999-07-28 | June Annie Lynch Perry | Method and apparatus for removing carbon from utensils |
| US6671916B2 (en) | 2001-08-02 | 2004-01-06 | Maytag Corporation | Laundry appliance having automatic start feature |
| CN100383313C (en) * | 2002-06-11 | 2008-04-23 | 乐金电子(天津)电器有限公司 | Drying controller and control method for drying machine |
| US7516629B2 (en) | 2000-12-21 | 2009-04-14 | Whirlpool Corporation | Laundry appliance having automatic start feature based on selected stain |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5137041A (en) * | 1990-09-21 | 1992-08-11 | Glastender, Inc. | Dishwasher with fill water control |
| DE4209232C2 (en) * | 1992-03-21 | 1996-11-28 | Aeg Hausgeraete Gmbh | Method for controlling a dishwasher and dishwasher for performing the method |
| DE19651345A1 (en) * | 1996-12-10 | 1998-06-18 | Bosch Siemens Hausgeraete | Programme selection device for domestic electric dishwashing machine |
| DE19651296B4 (en) * | 1996-12-10 | 2016-11-10 | BSH Hausgeräte GmbH | Dishwasher with a control device |
| DE19651297B4 (en) * | 1996-12-10 | 2016-11-24 | BSH Hausgeräte GmbH | Method for operating a dishwasher |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1395951A (en) * | 1971-07-21 | 1975-05-29 | Hobart Corp | Dishwashing machines |
| US3888269A (en) * | 1973-07-17 | 1975-06-10 | Whirlpool Co | Control system for dishwasher |
| GB2017341A (en) * | 1978-02-14 | 1979-10-03 | Bauknecht Gmbh G | Program-indicating device |
| EP0009249A1 (en) * | 1978-09-23 | 1980-04-02 | Bauknecht Hausgeräte GmbH | Indicating and operating mechanism for electrical appliances |
| GB2052251A (en) * | 1979-05-03 | 1981-01-28 | Licentia Gmbh | Method of controlling the operation of an automatic washing machine |
| GB2065722A (en) * | 1979-12-18 | 1981-07-01 | Bosch Siemens Hausgeraete | An automatic washing machine |
| EP0188858A1 (en) * | 1985-01-23 | 1986-07-30 | Whirlpool Corporation | Dishwashing apparatus |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3662186A (en) * | 1969-06-27 | 1972-05-09 | Whirlpool Co | Electronic control circuit for appliances |
| DE2829003A1 (en) * | 1978-07-01 | 1980-01-10 | Bosch Siemens Hausgeraete | METHOD FOR CHOOSING A PROGRAM FOR WATER-CONTAINING HOUSEHOLD APPLIANCES, LIKE DISHWASHER AND WASHING MACHINES, AND ANY APPARATUS FOR CARRYING OUT THE METHOD |
-
1987
- 1987-12-30 GB GB08730286A patent/GB2199676A/en not_active Withdrawn
- 1987-12-30 DE DE19873744559 patent/DE3744559A1/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1395951A (en) * | 1971-07-21 | 1975-05-29 | Hobart Corp | Dishwashing machines |
| US3888269A (en) * | 1973-07-17 | 1975-06-10 | Whirlpool Co | Control system for dishwasher |
| GB2017341A (en) * | 1978-02-14 | 1979-10-03 | Bauknecht Gmbh G | Program-indicating device |
| EP0009249A1 (en) * | 1978-09-23 | 1980-04-02 | Bauknecht Hausgeräte GmbH | Indicating and operating mechanism for electrical appliances |
| GB2052251A (en) * | 1979-05-03 | 1981-01-28 | Licentia Gmbh | Method of controlling the operation of an automatic washing machine |
| GB2065722A (en) * | 1979-12-18 | 1981-07-01 | Bosch Siemens Hausgeraete | An automatic washing machine |
| EP0188858A1 (en) * | 1985-01-23 | 1986-07-30 | Whirlpool Corporation | Dishwashing apparatus |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992009017A1 (en) * | 1990-11-08 | 1992-05-29 | Griverus Bernt | Methods and devices for control of fluidic systems |
| GB2333441A (en) * | 1997-11-14 | 1999-07-28 | June Annie Lynch Perry | Method and apparatus for removing carbon from utensils |
| GB2333441B (en) * | 1997-11-14 | 2000-09-06 | June Annie Lynch Perry | Carbon removal apparatus and method |
| US7516629B2 (en) | 2000-12-21 | 2009-04-14 | Whirlpool Corporation | Laundry appliance having automatic start feature based on selected stain |
| US6671916B2 (en) | 2001-08-02 | 2004-01-06 | Maytag Corporation | Laundry appliance having automatic start feature |
| CN100383313C (en) * | 2002-06-11 | 2008-04-23 | 乐金电子(天津)电器有限公司 | Drying controller and control method for drying machine |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8730286D0 (en) | 1988-02-03 |
| DE3744559A1 (en) | 1988-07-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |