EP0074108B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Cooker with heating control system
Assignee: Panasonic Holdings Corp
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Filing: 1982-09-06
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Granted: 1985-04-24
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Expires: 2002-09-06
Abstract
No abstract record available.
Inventors
- 👤 Keiichi Mori
- 👤 Shojiro Inoue
- 👤 Manabu Takada
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 12:59
CPC Classifications
A; A47; A47J; A47J27/00; A47J27/56; A47J27/62; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1917; G05D23/20; G05D23/24
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
152 words
A cooker comprising: heating means (3) for heating food material in a container (4), temperature measuring means (6) for measuring temperature of an outer face of the container, and issuing temperature signals, heat control means (2, 2') for controlling the amount of heat issued from the heating means (3) and a heat control circuit (7) for issuing a control signal to the heat control means (2, 2') based on said temperature signals input thereto, said heat control circuit (7) comprising temperature gradient signal generator means (8) for producing a signal of the temperature-time gradient from the input temperature signal, bending point detector means (9) for detecting the bending point of the temperature increase and issuing a detection signal and a heating control signal generator (10) for outputting the control signal to the heat amount control means (2, 2') which is at least based on the output of the bending point detector (9).
Claim 2
Dependent Claim
152 words
A cooker comprising: heating means (3) for heating food material in a container (4), temperature measuring means (6) for measuring temperature of an outer face of the container, and issuing temperature signals, heat control means (2, 2') for controlling the amount of heat issued from the heating means (3) and a heat control circuit (7) for issuing a control signal to the heat control means (2, 2') based on said temperature signals input thereto, said heat control circuit (7) comprising temperature gradient signal generator means (8) for producing a signal of the temperature-time gradient from the input temperature signal, bending point detector means (9) for detecting the bending point of the temperature increase and issuing a detection signal and a heating control signal generator (10) for outputting the control signal to the heat amount control means (2, 2') which is at least based on the output of the bending point detector (9).
Claim 3
Dependent Claim
58 words
A cooker in accordance with claim 1, wherein said temperature gradient signal generator (8) is constructed to sample said temperature signals with sampling time pitch to produce temperature differnces between temperatures at neighboring sampling times, and said bending point detector (9) is constructed to detect a time when the ratio between neighboring temperature gradients exceeds a reference range.
Claim 4
Dependent Claim
57 words
A cooker in accordance with claim 1, wherein said temperature gradient signal generator (8) is constructed to sample said temperature signals with sampling time pitch to produce temperature differences between temperatures at neighboring sampling times, and said bending point detector (9) is constructed to detect a time when difference between neighboring temperature gradients exceeds a reference range.
Claim 5
Dependent Claim
53 words
A cooker in accordance with claim 1, wherein, in said heat control circuit, a measured temperature of said temperature measuring means (6) at the time of bending point detection is set as a set temperature, and amount of heating thereafter is controlled responding to temperature differences between measured temperatures and said set temperature.
Claim 6
Dependent Claim
53 words
A cooker in accordance with claim 2, wherein, in said heat control circuit, a measured temperature of said temperature measuring means (6) at the time of bending point detection is set as a set temperature, and amount of heating thereafter is controlled responding to temperature differences between measured temperatures and said set temperature.
Claim 7
Dependent Claim
57 words
A cooker in accordance with claim 3, wherein said temperature gradient signal generator (8) is constructed to sample said temperature signals with sampling time pitch to produce temperature differences between temperatures at neighboring sampling times, and said bending point detector (9) is constructed to detect a time when difference between neighboring temperature differences exceed a reference range.
Claim 8
Dependent Claim
28 words
A cooker in accordance with claim 4, wherein said heat control circuit (7) controls the amount of heating responding to said temperature gradient at an initial heating stage.
Claim 9
Dependent Claim
28 words
A cooker in accordance with claim 5, wherein said heat control circuit (7) controls the amount of heating responding to said temperature gradient at an initial heating stage.
Claim 10
Dependent Claim
27 words
A cooker in accordance with claim 6, wherein said heat control circuit (7) controls amount of heating responding to said temperature gradient at an initial heating stage.
Claim 11
Dependent Claim
27 words
A cooker in accordance with claim 4, wherein said heat control circuit (7) adjusts said set temperature responding to the temperature gradient at an initial heating stage.
Claim 12
Dependent Claim
26 words
A cooker in accordance with claim 5, wherein said heat control circuit (7) adjusts said set temperature responding to temperature gradient at an initial heating stage.
Claim 13
Dependent Claim
26 words
A cooker in accordance with claim 6, wherein said heat control circuit (7) adjusts said set temperature responding to temperature gradient at an initial heating stage.
Claim 14
Dependent Claim
37 words
A cooker in accordance with claim 1, wherein said temperature gradient signal generator means (8) issues said temperature gradient signal to said bending point detect means only after reaching of the measured temperature to a predetermined temperature.
Claim 15
Dependent Claim
29 words
A cooker in accordance with claim 1, wherein a reference value for use in deciding said bending point is adjusted responding to temperature gradient at an initial heating stage.
Claim 16
Dependent Claim
28 words
A cooker in accordance with claim 2, wherein said reference value to be compared with said ratio is adjusted responding to temperature gradient at an initial heating stage.
Claim 17
Dependent Claim
28 words
A cooker in accordance with claim 3, wherein said reference value to be compared with said difference is adjusted responding to temperature gradient at an initial heating stage.
Claim 18
Dependent Claim
49 words
A cooker in accordance with claim 1, wherein a reference value used for deciding said bending point is adjusted by selected one of a predetermined number of functions each having said temperature gradient as variant, said selection being made responding to said temperature gradient at an initial heating stage.
Claim 19
Dependent Claim
46 words
A cooker in accordance with claim 16, wherein said bending point detection means decides bending point by comparison between a reference value and a temperature gradient which is obtained by sampling at a sampling time pitch, said sampling pitch being adjusted responding to said temperature gradient.
Claim 20
Dependent Claim
46 words
A cooker in accordance with claim 17, wherein said bending point detection means decide bending point by comparison between a reference value and a temperature gradient which is obtained by sampling at a sampling time pitch, said sampling pitch being adjusted responding to said temperature gradient.
Claim 21
Dependent Claim
32 words
A cooker in accordance with either one of claims 7, 8, 9,10,11,12,14,15,16 and 17, wherein said intial temperature gradient is a temperature gradient immediately after detection of a measurement of starting temperature.
Claim 22
Dependent Claim
26 words
A cooker in accordance with claim 1, wherein said temperature sensor measures a temperature of an outer face at substantially the bottom part of said container.
References Cited (Backward Citations)
No citation records indexed.
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