GB2241615A - Heater change-over switch for an electric oven - Google Patents
Heater change-over switch for an electric oven Download PDFInfo
- Publication number
- GB2241615A GB2241615A GB9103692A GB9103692A GB2241615A GB 2241615 A GB2241615 A GB 2241615A GB 9103692 A GB9103692 A GB 9103692A GB 9103692 A GB9103692 A GB 9103692A GB 2241615 A GB2241615 A GB 2241615A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oven
- heater
- heaters
- contact means
- cooking
- 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- Withdrawn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
-
- 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
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/647—Aspects related to microwave heating combined with other heating techniques
- H05B6/6482—Aspects related to microwave heating combined with other heating techniques combined with radiant heating, e.g. infrared heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/32—Arrangements of ducts for hot gases, e.g. in or around baking ovens
- F24C15/322—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation
- F24C15/325—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation electrically-heated
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1906—Control of temperature characterised by the use of electric means using an analogue comparing device
- G05D23/1912—Control of temperature characterised by the use of electric means using an analogue comparing device whose output amplitude can take more than two discrete values
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
- G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
-
- 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
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/6408—Supports or covers specially adapted for use in microwave heating apparatus
- H05B6/6411—Supports or covers specially adapted for use in microwave heating apparatus the supports being rotated
-
- 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
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/6447—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors
- H05B6/645—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors using temperature sensors
-
- 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
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/66—Circuits
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electric Ovens (AREA)
- Electric Stoves And Ranges (AREA)
- Control Of High-Frequency Heating Circuits (AREA)
Abstract
Heaters 6, 7 are connected in parallel for cooking food in an oven cavity, but can be connected in series to assist a grill heater 2 for grilling food in the oven. A magnetron 11 is operable at two power levels for microwave cooking and can also be used together with the oven and grill heaters 2, 6, 7 for combination cooking. The heaters 2, 6, 7, an air circulation fan 5, a food turntable motor 10, the magnetron 11, and a magnetron cooling fan 12 are controlled by a microcomputer 13 responsive to a temperature sensing thermistor 8. <IMAGE>
Description
HEATER CHANGE-OVER SWITCH FOR AN ELECTRIC OVEN
This invention relates to a heater change-over switch for an electric oven that connects a plurality of oven heaters in series to assist a grill heater for efficient grill cooking with low power consumption.
Conventional heater change-over switches energize either an oven heater or a grill heater; that is, the oven heater is energized only for oven cooking and the grill heater is energized only for grill cooking. When grilling some food in a cold oven for cavity, the food is also cold and it takes a long time to give a grill effect that burns the surface of the food.
Therefore, an aim of the present invention is to provide an improved heater change-over switch that gives a grill effect in a short time with low power consumption.
According to the present invention there is provided a heater change-over switch for use in an electric oven having a plurality of parallel-connected oven heaters for circulating hot air for cooking food in a cooking cavity and a grill heater for grilling food in the cooking cavity, the switch comprising:
a) first contact means for connecting the oven heaters in parallel;
b) second contact means for connecting the oven heaters in series; and,
c) relay means for selectively activating either said first contact means or said second contact means.
The maximum demand is not so high and it does not necessitate any special power saving unit such as a transformer, because the power consumption of the oven heaters can be cut down by connecting the oven heaters in series.
The present invention will be further described hereinafter with reference to the following description of exemplary embodiments and the accompanying drawings, in which:
Fig. 1 shows a general structure of an electronic oven.
Fig. 2 is a circuit diagram showing the electric structure of the oven.
Fig. 3 is a table showing the relationship between the cooking modes and the states of the relays.
Figs. 4 and 5 show a second embodiment of the present invention, and correspond to Fig. 2 and Fig. 3, respectively.
Hereinafter, an embodiment of the present invention will be detailed according to Figs. 1 through 3.
As shown in Fig. 1, a grill heater 2 is provided in the upper portion of an oven cavity 1 and a turntable 9 and a turntable motor 10 are provided at the bottom of the oven cavity 1. A heater box 3 at the rear of the oven cavity 1 contains a first oven heater 6, a second oven heater 7, and a hot air circulation fan 4. The circulation fan 4, rotated by a fan motor 5, blows air heated by the oven heaters 6 and 7 into the oven cavity 1 so as to raise temperature in the cavity. A thermistor 8 for detecting temperature is provided in order to maintain a certain temperature in the cavity by controlling the oven heaters 6 and 7. Numerals 11 and 12 in
Fig. 1 denote a magnetron and a fan motor for cooling the magnetron, respectively.
In an AC power supply shown in Fig. 2, the turntable motor 10, the fan motor 12 for cooling the magnetron, the fan motor 5 for circulating heated air, the first oven heater 6, and the grill heater 2 are connected in parallel via a known fuse and a door switch (not shown), and furthermore, the magnetron 11 is connected via a high-voltage transformer.
One end of the second oven heater 7 is connected with the first oven heater 6 and the other end of the heater 7 is connected with a moving contact of a relay RL3 so that the second oven heater 7 and the first oven heater 6 are connected in parallel and in series alternatively. An exciting coil of the relay RL3 is connected in parallel with the grill heater 2. Thus, when the grill heater 2 is energized, the exciting coil switches the relay RL3 to the normally open contact (NO) on the right hand in Fig. 2 so as to connect the first and second oven heaters 6 and 7 in series. While the grill heater 2 is not being energized, on the other hand, the exciting coil is not energized so that the relay RL3 is on the normally closed contact (NC) on the left hand in Fig. 2 so as to connect those heaters 6 and 7 in parallel.
A control circuit 13 including a microcomputer is connected with the power circuit. More specifically, the control circuit 13 has a CPU 14 for operation control, a
ROM 15 storing operation programs and the like, and a RAM 16 for temporarily storing detected data and the like. The control circuit 13 turns on or off relays RL1, RL2, and RL5-9 in order to control the above-mentioned motors and heaters and to control the output of the magnetron. Further, the control circuit 13 receives a detection signal from the thermistor 8 that detects the temperature in the oven cavity 1.
In response to selection of one cooking mode among several modes: i.e., microwave cooking, oven cooking, grill cooking, and combination cooking, by means of an operation panel provided in front of the oven, the relays RL1, RL2, and
RL5-9 are appropriately turned on or off in the following manners to perform the selected cooking mode. When the relays RL5 and RL9 are turned on, the magnetron 11 is oscillated at a high power of 2,000 watts to do strong microwave cooking. When the relays RL9 and RL5 are turned off and on, respectively, the magnetron 11 is oscillated at a low power of 1,200 watts to do weak microwave cooking. When the relays RL1 and RL6 are both turned on, the first oven heater 6 and the second oven heater 7, each consuming 800 watts, are energized and the circulation fan motor 5 is also activated so as to perform oven cooking at a power level of 1,600 watts.When the relays RL2 and RL6 are turned on, the grill heater 2 of 1,200 watts is energized and the relay RL3 connects the first and second oven heaters 6 and 7 in series as described above, thus consuming 400 watts. As a result, grill cooking is performed at a power level of 1,600 watts in all.
When the relays RL9 and RL5 are turned off and on, respectively, so as to oscillate the magnetron 11 at low power and the relays RL1 and RL6 are turned on so as to energize the first and second oven heaters 6 and 7 and the circulation fan motor 5, a first combination cooking by microwave and the oven is performed at a power level of 2,800 watts in all. When the relays RL9 and RL5 are turned off and on, respectively, so as to oscillate the magnetron 11 at low power and the relays RL2 and RL6 are turned on so as to energize the first and second oven heaters 6 and 7 and the grill heater 2 that have been connected in series by means of the relay RL3, a second combination cooking of microwave and the grill is performed at a power level of 2,800 watts in all.
During oven cooking including the combination cooking with microwave, the oven heaters 6 and 7 are controlled according to detection signals of the thermistor 8 so that the temperature in the oven cavity becomes a pre-determined temperature. During grill cooking including the combination cooking with microwaves, the circulation fan motor 5 is rotated and the grill heater 2 is similarly controlled according to the thermistor 8. Therefore, a detecting sensor for the grill heater 2 is unnecessary.
Figs. 4 and 5 show a second embodiment of the invention that performs a combination of strong microwave cooking and oven cooking. As shown in Fig. 4, a contact point of the relay RL3 in the second embodiment is different from that of the first embodiment (Fig. 2), and a relay RL4 is provided for the second oven heater 7. In order to perform grill cooking including the combination cooking with microwave, the relays RL2 and RL4 are turned on to energize the grill heater 2 and connect the first and second oven heaters 6 and 7 in series. In order to do oven cooking, the relays RL1 and
RL6 are turned on and the relay RL4 is turned on to energize the first and second oven heaters 6 and 7 in series.
A combination cooking of microwave cooking and oven cooking at a power level of 2,800 watts is performed in the same manner as in the first embodiment; that is, the magnetron 11 is oscillated at low power by turning the relay
RL5 on and the relay RL9 off and the oven heaters 6 and 7 are energized by turning on the relays RL1, RL4 and RL6.
Furthermore, the second embodiment carries out another combination of strong microwave cooking and oven cooking at a power level of 2,800 watts in all as follows. The relays RL5 and RL9 are turned on to oscillate the magnetron 11 at high power and the relay RL4 is turned off and the relays RL1 and
RL6 are turned on to energize only the first oven heater 6.
If necessary, oven cooking at a power level of 800 watts is also available by turning on the relays RLl and RL6. Thus, this embodiment can provide high-power combination cooking demanding 2,800 watts at most.
As described in detail above, several oven heaters are connected in series to be operated with the grill heater during grill cooking. Therefore, the grill effect appears sooner than when the grill heater independently operates.
Because the power consumption of the oven heaters can be cut down by connecting the oven heaters in series, the maximum demand is not so high and it does not necessitate any special power saving unit such as a transformer.
Obviously, numerous modifications and variations of the present invention are possible in light of the above teachings within the scope of the appended claims.
Claims (19)
1. A heater change-over switch for use in an electric oven having a plurality of parallel-connected oven heaters for circulating hot air for cooking food in a cooking cavity and a grill heater for grilling food in the cooking cavity, the switch comprising:
a) first contact means for connecting the oven heaters in parallel;
b) second contact means for connecting the oven heaters in series; and,
c) relay means for selectively activating either said first contact means or said second contact means.
2. A switch according to claim 1, further comprising:
first activation means connected to said relay means and the grill heater for activating said first contact means when the grill heater is turned off and for activating said second contact means when the grill heater is turned on.
3. A switch according to claim 1 or 2, further comprising:
a) circulation fan means for circulating hot air in the cooking cavity; and,
b) second activation means connected to said circulation fan means for activating said circulation fan means when the grill heater is turned on.
4. A switch according to claim 3 and additionally comprising:
thermistor control means connected for controlling power to the grill heater and the oven heaters, said first activation means, and said second activation means whereby temperature in the cooking cavity of the electric oven is maintained at selected temperatures for cooking.
5. A switch according to any one of claims 1 to 4, wherein:
said first contact means and said second contact means include means for bypassing at least one of the plurality of oven heaters and not applying power thereto when said second contact means is activated.
6. An electric oven having a plurality of oven heaters and a circulation fan for generating and circulating hot air for cooking food in a cooking cavity and a grill heater for grilling food in the cooking cavity, and
a heater change-over switch connected for applying power to the oven heaters in parallel in a first position and for applying power to the oven heaters in series in a second position, said heater change-over switch further including switching means for selectively switching said heater change-over switch between said first position and said second position.
7. An electric oven according to claim 6, wherein said heater change-over switch comprises:
a) first contact means for connecting the oven heaters in parallel to a source of power;
b) second contact means for connecting the oven heaters in series to a source of power; and,
c) relay means for selectively and exclusively activating said first contact means and said second contact means.
8. An electric oven according to claim 7, and further comprising:
first activation means connected to said relay means and the grill heater for activating said first contact means when the grill heater is turned off and for activating said second contact means when the grill heater is turned on.
9. An electr-ic oven according to claim 8, and further comprising:
second activation means connected to the circulation fan for activating the circulation fan when the grill heater is turned on.
10. An electric oven according to claim 9 and additionally comprising:
thermistor control means connected for controlling power to the grill heater and the oven heaters, said first activation means, and said second activation means whereby temperature in the cooking cavity of the electric oven is maintained at selected temperatures for cooking.
11. An electric oven according to any one of claims 7-10 wherein:
said first contact means and said second contact means include means for bypassing at least one of the plurality of oven heaters and not applying power thereto when said second contact means is activated.
12. An electric oven having a cooking cavity and further comprising:
a) a plurality of oven heaters and a circulation fan for generating and circulating hot air for cooking food in the cooking cavity;
b) a grill heater for grilling food in the cooking cavity; and,
c) a heater change-over switch connected for applying power to said oven heaters in parallel in a first position and for applying power to said oven heaters in series in a second position, said heater change-over switch further including switching means for selectively switching said heater change-over switch between said first position and said second position.
13. An electric oven according to claim 12, wherein said heater change-over switch comprises:
a) first contact means for connecting said oven heaters to a source of power in parallel;
b) second contact means for connecting said oven heaters to a source of power in series; and,
c) relay means for selectively and exclusively activating said first contact means and said second contact means.
14. An electric oven according to claim 12 or 13, and additionally comprising:
first activation means connected to said switching means and said grill heater for switching said heater change-over switch to said first position when said grill heater is turned off and for switching said heater changeover switch to said second position when said grill heater is turned on.
15. An electric oven according to claim 12, 13 or 14, and additionally comprising:
second activation means connected to said circulation fan for activating said circulation fan when said grill heater is turned on.
16. An electric oven according to claim 15 and additionally comprising:
thermistor control means connected for controlling power to said grill heater and said oven heaters, said first activation means, and said second activation means whereby temperature in said cooking cavity of said oven is maintained at selected temperatures for cooking.
17. An electronic oven according to any one of claims 12 to 16, wherein:
said heater change-over switch includes means for bypassing at least one of said plurality of oven heaters and not applying power thereto when said heater change-over switch is in said second position.
18. A heater change-over switch constructed and arranged to operate substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
19. An electric oven constructed and arranged to operate substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2043366A JPH03247919A (en) | 1990-02-23 | 1990-02-23 | Heater changing-over device for oven range |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9103692D0 GB9103692D0 (en) | 1991-04-10 |
| GB2241615A true GB2241615A (en) | 1991-09-04 |
Family
ID=12661851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9103692A Withdrawn GB2241615A (en) | 1990-02-23 | 1991-02-21 | Heater change-over switch for an electric oven |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH03247919A (en) |
| GB (1) | GB2241615A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4027777A1 (en) * | 1990-09-01 | 1992-03-05 | Kueppersbusch | Combined conventional and microwave oven - has coupling pin coupled to magnetron fitting between adjacent meanders of radiation heating element |
| EP0730391A3 (en) * | 1995-02-28 | 1997-03-26 | Samsung Electronics Co Ltd | Temperature control method and device for microwave oven |
| WO2013098012A1 (en) * | 2011-12-26 | 2013-07-04 | Arcelik Anonim Sirketi | Oven wherein the power of the heater is controlled |
| EP2797385A4 (en) * | 2011-12-20 | 2015-06-03 | Panasonic Corp | MICROWAVE HEATING DEVICE |
| IT201800005863A1 (en) * | 2018-05-30 | 2019-11-30 | ELECTRICALLY POWERED OVEN AND OPERATING METHOD OF THIS OVEN | |
| CN111033127A (en) * | 2018-05-21 | 2020-04-17 | 松下知识产权经营株式会社 | Microwave processing apparatus |
| EP4008967A1 (en) * | 2020-12-07 | 2022-06-08 | WELBILT Deutschland GmbH | Cooking device, in particular commercial cooking device |
| EP4598270A4 (en) * | 2022-11-09 | 2026-01-14 | Guangdong Midea Kitchen Appliances Mfg Co Ltd | VARIABLE FREQUENCY DRIVER CIRCUIT AND COOKING DEVICE |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3827013B2 (en) | 2004-03-19 | 2006-09-27 | シャープ株式会社 | Steam cooker |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB475470A (en) * | 1936-04-06 | 1937-11-19 | Etienne Challet | Device for preventing the over-heating of the oven-grill in an electric cooker |
| GB800938A (en) * | 1955-04-18 | 1958-09-03 | Vickers Electrical Co Ltd | Improvements in and relating to the control of electrical heating apparatus |
| US4575616A (en) * | 1982-02-05 | 1986-03-11 | Aktiebolaget Electrolux | Domestic infra-red radiation oven |
| GB2178914A (en) * | 1985-07-26 | 1987-02-18 | Bosch Siemens Hausgeraete | Electric heating means |
-
1990
- 1990-02-23 JP JP2043366A patent/JPH03247919A/en active Pending
-
1991
- 1991-02-21 GB GB9103692A patent/GB2241615A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB475470A (en) * | 1936-04-06 | 1937-11-19 | Etienne Challet | Device for preventing the over-heating of the oven-grill in an electric cooker |
| GB800938A (en) * | 1955-04-18 | 1958-09-03 | Vickers Electrical Co Ltd | Improvements in and relating to the control of electrical heating apparatus |
| US4575616A (en) * | 1982-02-05 | 1986-03-11 | Aktiebolaget Electrolux | Domestic infra-red radiation oven |
| GB2178914A (en) * | 1985-07-26 | 1987-02-18 | Bosch Siemens Hausgeraete | Electric heating means |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4027777A1 (en) * | 1990-09-01 | 1992-03-05 | Kueppersbusch | Combined conventional and microwave oven - has coupling pin coupled to magnetron fitting between adjacent meanders of radiation heating element |
| EP0730391A3 (en) * | 1995-02-28 | 1997-03-26 | Samsung Electronics Co Ltd | Temperature control method and device for microwave oven |
| US5814794A (en) * | 1995-02-28 | 1998-09-29 | Samsung Electronics Co., Ltd. | Temperature control apparatus of microwave oven and method thereof |
| EP2797385A4 (en) * | 2011-12-20 | 2015-06-03 | Panasonic Corp | MICROWAVE HEATING DEVICE |
| US9609698B2 (en) | 2011-12-20 | 2017-03-28 | Panasonic Intellectual Property Management Co., Ltd. | Microwave heating device |
| WO2013098012A1 (en) * | 2011-12-26 | 2013-07-04 | Arcelik Anonim Sirketi | Oven wherein the power of the heater is controlled |
| CN111033127A (en) * | 2018-05-21 | 2020-04-17 | 松下知识产权经营株式会社 | Microwave processing apparatus |
| EP3798518A4 (en) * | 2018-05-21 | 2021-07-07 | Panasonic Intellectual Property Management Co., Ltd. | MICROWAVE PROCESSING DEVICE |
| IT201800005863A1 (en) * | 2018-05-30 | 2019-11-30 | ELECTRICALLY POWERED OVEN AND OPERATING METHOD OF THIS OVEN | |
| EP3575693A1 (en) * | 2018-05-30 | 2019-12-04 | SMEG S.p.A. | Electric oven and method of operation of such oven |
| EP4008967A1 (en) * | 2020-12-07 | 2022-06-08 | WELBILT Deutschland GmbH | Cooking device, in particular commercial cooking device |
| EP4598270A4 (en) * | 2022-11-09 | 2026-01-14 | Guangdong Midea Kitchen Appliances Mfg Co Ltd | VARIABLE FREQUENCY DRIVER CIRCUIT AND COOKING DEVICE |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03247919A (en) | 1991-11-06 |
| GB9103692D0 (en) | 1991-04-10 |
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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) |