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Electric cooker

A cooker, electrical technology, applied in electrical components, circuits, electrical switches, etc., can solve problems such as differences in firepower setting values, problems of contact durability, and troublesome replacement.

Inactive Publication Date: 2008-03-19
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the existing bimetal structure, the performance of each finished bimetal has a large random error, and if the matching with the heater is different, the firepower setting value will be significantly different. Therefore, it is necessary to make the corresponding wattage of each heater The amount is consistent, requiring more careful control
Moreover, there are problems such as a long working cycle time in the control, so that there is a lot of useless heat diffusion, and the thermal efficiency of the food is poor.
In addition, from the perspective of the product life of the electric cooker, there is a problem in the durability of the contacts. For large appliances such as kitchen systems that require periodic replacement and have a large number of heating heaters, the replacement is quite troublesome. Therefore, maintenance particularly profound problems

Method used

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Embodiment Construction

[0017] An embodiment of the present invention will be described below with reference to the drawings. Fig. 1 shows the composition of a double-cooker electric cooker according to an embodiment of the present invention.

[0018] In Fig. 1, 1 is the first heater, 2 is the first relay, and 3 is its contact. 4 is a resistor built-in transistor for driving the first relay 2, including a built-in base resistor 4a and a built-in base-emitter resistor 4b. 5 is the first welding detection part for detection when the contact 3 is welded, and 7 is its output pull-up resistor. The first fusion detection unit 5 is composed of a transistor 5a, a base current limiting resistor 5b, and a base-emitter reverse voltage protection diode 5c. 8. As a control unit, a microcomputer is used in this embodiment. 9 is a mains zero point detection part, which is configured such that the signal obtained by dividing the voltage through the resistors 10 and 11 is detected by the transistor 9a. Diode 9b i...

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Abstract

The present invention relates to an electric cooker in which a control means is utilized to improve the contact endurance, to realize a fine control and to do without maintenance work, so as to solve the problems in present topics such as: due to a bimetallic contact point, a fine control is out of sight; due to a bimetallic contact point, random error and poor durability of a contact point is occurred; particularly the problem in maintenance work. In order to overcome these problems, a control means is used for opening / closing the contacts of a relay at the zero point of a commercial power source and a pulse signal switching means for generating a short pulse signal adapted to allow the relay to remedy the fusion lock of the contacts thereof by itself, and these functional controls are applied by a plurality of heaters.

Description

technical field [0001] The invention relates to an electric cooker with multiple heaters capable of adjusting firepower. Background technique [0002] Usually, this kind of electric cooker with a plurality of heaters has a known composition as shown in FIG. 9 for its fire power adjustment. [0003] Among the figure, 31 and 38 are heaters, and 32 and 39 are fire regulators utilizing bimetal to regulate heater fire. 33 is commercial power, 34 is a warning lamp indicating heater energization state, 35,40 are built-in switches of fire regulator, and 36,41 are bimetallic switches of control end. 37,42 are auxiliary heaters for heating the bimetal, connected in series with the heaters 31,38, and integrated with the control end switches 36,41. [0004] The temperature regulation of this electric cooker is to use this auxiliary heater 37,42 to heat bimetal switch 36,41, makes it open and close with switch 35,40 linkage. [0005] However, in the existing bimetal structure, the per...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24C7/04H05B1/02F24C7/08H01H1/00H01H1/60H01H9/56
CPCH05B1/0266H05B1/0213H01H1/0015H01H9/56F24C7/087H01H1/605
Inventor 菊冈三彦柴田悟
Owner PANASONIC CORP