WO2002089528A1 - Improved user interface for cooking appliances - Google Patents
Improved user interface for cooking appliances Download PDFInfo
- Publication number
- WO2002089528A1 WO2002089528A1 PCT/US2002/013404 US0213404W WO02089528A1 WO 2002089528 A1 WO2002089528 A1 WO 2002089528A1 US 0213404 W US0213404 W US 0213404W WO 02089528 A1 WO02089528 A1 WO 02089528A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heating element
- switch
- push
- power
- rotary switch
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0227—Applications
- H05B1/0252—Domestic applications
- H05B1/0258—For cooking
- H05B1/0261—For cooking of food
- H05B1/0266—Cooktops
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
- H05B3/74—Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
- H05B3/746—Protection, e.g. overheat cutoff, hot plate indicator
Definitions
- the present invention relates in general to cooking appliances.
- the present invention relates to an interface for cooking appliances.
- Heaters in cooling appliances such as glass-ceramic cooktops, often have the radiant heater located underneath a piece of ceramic-glass or constructed such that the heating element is in direct contact with the cookware as in a conductive system.
- the heater or heaters are generally controlled with a known form of electromechanical regulator or some type of electronic control that cycles the heater on and off using an adjustable time base technology. This technology mechanically accomplishes the two step on, one step off function, but will not communicate with electronic controllers. Another type of control alters the electrical supply wave form to change the power applied to the heaters.
- One such control is an infrared touch control that uses reflected infrared light as the user interface.
- Another known user interface for an electronic control in glass-ceramic cooktops is the field effect sensor technology. This technology uses electrostatic fields that emanates around a touch pad. When the user interrupts this field the controller interprets this as human actuation.
- the capacitance touch sensor is another known input to an electronic control for this application.
- One other input device that the user may interface with an electronic control is the membrane switch.
- the electromechanical regulators are time based controls that turn on the heaters with full power for a period of time and then off for a period of time.
- the shortest cycle time they can manage is anywhere from one to two minutes. This type of control gives very poor heat regulation, especially at the lower heat settings.
- the infrared touch control has problems of insensitive, incorrect or random switch actuation that can occur due to a spill on the cooktop surface or placing a pan or other items over or against the touch pad.
- the field-effect and capacitance touch sensors have problems with incorrect or random switch actuation due to RF and e-fleld interference. Moisture presents extreme difficulties for conventional capacitance sensors.
- Plastic membrane switches are very heat sensitive and present a problem due to varying texture and tactile feel. They often appear wrinkled or wavy, become dull with use and are difficult to color match with adjacent panels and substrates. The membrane edges also trap dirt, which can contaminate the signal and create cleaning problems. Presently, electronic controllers accomplish the safety agencies' two step on, one step off function by adding redundant circuitry. Summary
- One embodiment of the present invention provides a cooking controller assembly, including a heating element, a push-to-tum rotary switch, and an electric controller.
- the heating element is coupled to the push-to-tum rotary switch and the electric controller.
- the push-to-tum rotary switch is manually pushed and turned to selectively connect power to the heating element.
- the electric controller is coupled to the push-to-turn rotary switch and the heating element, and electrically controls the power to the heating element in relation to the manual rotation of the push-to-tum rotary switch.
- FIGS. 1A, IB, 1C, ID, IE, IF, and 1G are cross-sectional views of an embodiment of a switch assembly
- FIG. 2 is a perspective view of the switch assembly of FIG. 1, wherein the components of the switch assembly are detached;
- FIG. 3 is a rotational chart of one embodiment of a switch assembly
- FIG. 4 is a flow diagram of the switch assembly of FIG. 1;
- FIG. 5 is a block diagram of an embodiment of a cooking controller assembly. Detailed Description
- a switching apparatus 100 allows a user to interface with an electronic controller, which may energize an electric heater from a single alternating current voltage supply.
- the switch 100 may include two sets of dry contacts 125. One set 125 breaks the current to the heater and/or other device being controlled. A second set 125 of contacts energizes a warning light and/or other signal device for feedback to the user.
- the contacts 125 are activated by rotating a switch shaft 105.
- the switch shaft 105 is coupled to a camshaft 110 that can open (see FIG. IB) and close the contacts 125, through cams 150, at predetermined angles of rotation.
- the contacts 125 can either open and close at the same angle of rotation and/or can be set to open and close at different angles in the rotation of the shaft.
- One end of the switch shaft 105 can be fitted with a knob for ease of use.
- the other end of the switch shaft 105 goes through the switch housing 115 and is coupled to the camshaft 110.
- the switch shaft 105 may slide into the camshaft 110.
- a spring 120 is placed inside the camshaft 110 and between the camshaft 110 and the switch shaft 105. This spring 120 applies a force on the switch shaft 105 to hold the shaft 105 in an extended position.
- Appropriate stops are placed on the shafts to keep them from coming apart when the switch shaft 105 is in its extended position. Stops located in the switch housing 115 may not allow the shaft 105 to be rotated unless sufficient force is applied to the switch shaft 105.
- One end of the camshaft 110 is interconnected with the center contact of a potentiometer 130 (see FIG. 2).
- a potentiometer 130 When the camshaft 110 is rotated, the resistance between the output pins of the potentiometer 130 changes in relationship to the angular position of the shaft.
- the analog potentiometer 130 incorporated in the switch allows for a variable output.
- the output may be used to interface the mechanical movement of the potentiometer with a micro controller. This allows manual selection of anyone of a predetermined number of power settings for the heater or other device from the power supply (see FIG. 3).
- the switch 100 may include a temporary stop spring 135.
- This spring 135 rotates with the camshaft 110 and limits the rotation of the camshaft 110 at a predetermined point. This stop point alerts the end user that full power is applied to the equipment being controlled after the temporary stop is reached.
- a second condition can be achieved by applying additional rotational force to the shaft 110 to overcome the spring tension of the temporary stop spring 135. This allows the center tap of the potentiometer 130 to complete its travel to its end stop position. When the applied force is removed, the shaft returns to the temporary stop position. This action can be used as a momentary switch to signal the micro controller to perform another function.
- FIG. 4 illustrates another embodiment of a switch assembly.
- the switch assembly includes a shaft, a first switch SI and a second switch S2, a potentiometer 130 including a first and a second terminal, and a controller.
- the first switch S 1 may coupled to a first device.
- the second switch S2 may be coupled to a second device.
- the first device may include a heating element 510, whereas the second device may include an indicator 515 such as, for example, a light (see FIG. 5).
- the shaft is coupled to the first switch SI and the second switch S2, and may be manually pushed and turned (i) to a first position to selectively connect power, through the first switch, to the first device, and (ii) to a second position to selectively connect power, through the second switch, to the second device.
- the potentiometer 130 is be coupled to the shaft, and provides a variable resistance between the first and the second terminal in relation to the manual rotation of the shaft assembly.
- the controller is coupled to the potentiometer 130, and controls the power to the first device and/or the second device in relation to the variable resistance between the first and the second terminal of the potentiometer.
- the controller may include an electric controller 505 (e.g., a known electric controller). The electric controller 505 may then electrically control the power to the first device and/or the second device.
- the power contacts can be activated and deactivated at different angles of rotation of the shaft. This permits some event such as starting a cooling fan to occur before starting the next event such as energizing a heater.
- the potentiometer addresses the two step on and one step off function, required for safety agency approval.
- the potentiometer when used as an on/off switch can withstand the high current requirements when energizing and de-energizing a load such as a heater.
- the potentiometer may include a temporary stop in the travel of the wiper arm or center contact.
- the switch may include the ability to interface with an electronic power controller.
- One embodiment uses push to turn rotary switches as user control for an electric cooktop. The switches may interface with an electric controller which in turn controls the power to the electric heating elements. The user then has the familiar and comfortable feel of a rotary switch while having the advantage of electronic cooking control.
- FIG. 5 illustrates the embodiment of the cooking controller assembly.
- the cooking system may include a user interface that communicates with an electronic controller 505, which in rum modulates the power to the heater 510.
- the interface may include a push to turn rotary switch 100, which can be used to interface with an electronic heater controller 505.
- a push to turn on rotary switch By incorporating, for example, a push to turn on rotary switch, a user can cook using state of the art electronic controls while having the comfort and feel of a rotary switch.
- the two step on and one step off function does not require redundant circuits.
- the interface switch includes the ability to supply an adjustable analog signal to the microcontroller 505.
- the microcontroller 505 in turn can control the power being supplied to the heating elements 510. This allows the user to control the temperature of the heating element 510 very precisely such as, for example, medium and low temperatures.
- the rotary switch 100 is mechanically robust in design and resistant to damage due to either mechanical abuse and exposure to household chemicals.
- the cooking controller assembly may include a heating element 510, a shaft assembly, a switch, and an electric controller 505.
- the heating element 510 is coupled to the switch and the electric controller 505.
- the shaft assembly is coupled to the switch, and moved in a first direction and a second direction relative to the heating element 510 to selectively connect, through the switch, power to the heating element 510.
- the shaft assembly may include a knob, which is turnable by hand.
- the switch may include a push- to-tum switch.
- the electric controller 505 is coupled to the switch and the heating element 510, and electrically controls the power to the heating element 510 in relation to the movement in the first direction and or the second direction of the shaft assembly.
- the controller 505 may comprise one or more microprocessors, microcontrollers, or other arrays of logic elements. Also, the electronic controller 505 may include Diehl's EU-PPS Control, Diehl's ULCL Control, etc. The movement in the first direction and the movement in the second direction may be in the same direction. The power to the heating element may be supplied from a single alternating current voltage supply.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Food Science & Technology (AREA)
- Control Of Resistance Heating (AREA)
- Electric Stoves And Ranges (AREA)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002437175A CA2437175A1 (en) | 2001-04-26 | 2002-04-26 | Improved user interface for cooking appliances |
MXPA03009779A MXPA03009779A (es) | 2001-04-26 | 2002-04-26 | Interconexion mejorada de usuario para aparatos de cocinar. |
KR10-2003-7013257A KR20040015094A (ko) | 2001-04-26 | 2002-04-26 | 요리장치용 개선된 사용자 인터페이스 |
EP02766850A EP1382222A1 (de) | 2001-04-26 | 2002-04-26 | Verbesserte benutzerschnittstellen für kochgeräte |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US28633901P | 2001-04-26 | 2001-04-26 | |
US60/286,339 | 2001-04-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002089528A1 true WO2002089528A1 (en) | 2002-11-07 |
Family
ID=23098152
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2002/013404 WO2002089528A1 (en) | 2001-04-26 | 2002-04-26 | Improved user interface for cooking appliances |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1382222A1 (de) |
KR (1) | KR20040015094A (de) |
CN (1) | CN1502216A (de) |
CA (1) | CA2437175A1 (de) |
MX (1) | MXPA03009779A (de) |
WO (1) | WO2002089528A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106255236A (zh) * | 2016-09-23 | 2016-12-21 | 贵州遵义鑫阳电子科技有限公司 | 加热电路选通开关 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3739110A (en) * | 1970-12-22 | 1973-06-12 | Drayton Controls Ltd | Multiple switch control assembly with multiple pushbutton interlock latch bar and safety switch |
US4227062A (en) * | 1978-05-31 | 1980-10-07 | General Electric Company | Optimum time ratio control system for microwave oven including food surface browning capability |
US5126537A (en) * | 1986-12-10 | 1992-06-30 | Robertshaw Controls Company | Control unit and method of making the same |
US6079401A (en) * | 1998-12-10 | 2000-06-27 | Ranco Incorporated Of Delaware | Single knob rotary oven control apparatus providing continuous and discrete control information |
-
2002
- 2002-04-26 WO PCT/US2002/013404 patent/WO2002089528A1/en not_active Application Discontinuation
- 2002-04-26 KR KR10-2003-7013257A patent/KR20040015094A/ko not_active Application Discontinuation
- 2002-04-26 MX MXPA03009779A patent/MXPA03009779A/es unknown
- 2002-04-26 CA CA002437175A patent/CA2437175A1/en not_active Abandoned
- 2002-04-26 CN CNA028055438A patent/CN1502216A/zh active Pending
- 2002-04-26 EP EP02766850A patent/EP1382222A1/de not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3739110A (en) * | 1970-12-22 | 1973-06-12 | Drayton Controls Ltd | Multiple switch control assembly with multiple pushbutton interlock latch bar and safety switch |
US4227062A (en) * | 1978-05-31 | 1980-10-07 | General Electric Company | Optimum time ratio control system for microwave oven including food surface browning capability |
US5126537A (en) * | 1986-12-10 | 1992-06-30 | Robertshaw Controls Company | Control unit and method of making the same |
US6079401A (en) * | 1998-12-10 | 2000-06-27 | Ranco Incorporated Of Delaware | Single knob rotary oven control apparatus providing continuous and discrete control information |
Also Published As
Publication number | Publication date |
---|---|
CA2437175A1 (en) | 2002-11-07 |
KR20040015094A (ko) | 2004-02-18 |
MXPA03009779A (es) | 2004-01-29 |
CN1502216A (zh) | 2004-06-02 |
EP1382222A1 (de) | 2004-01-21 |
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