Electric cooking appliance and heating control method thereof

A technology of electric cooking utensils and control chips, which is applied in electric temperature control, heating devices, household appliances, etc. It can solve problems such as insufficient temperature, rotten food, and large volume of electric cooking utensils, so as to avoid excessive temperature rise Effect

Active Publication Date: 2013-11-27
ZHEJIANG SUPOR ELECTRICAL APPLIANCES MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this temperature control method are: 1. The power output of the heating plate is uneven, and the temperature fluctuates greatly with the opening and closing of the relay
2. Because the voltage of the mains will fluctuate, even if the food uses the same heating duty cycle, the average power will be different, which will affect the cooking effect
When the voltage is too high, because the average power becomes larger, the water in the pot boils too violently, causing the food to rot or even overflow; when the voltage is too low, because the average power becomes smaller, the temperature of the water in the pot is not enough, so the food cannot be cooked properly
3. When the silicon controlled silicon is used alone for temperature control, adjusting the power of the high-power heating element will cause the current passing through the silicon controlled silicon to be too large, resulting in a larger heating loss of the silicon controlled silicon, which requires a larger size radiator to be used together, resulting in the The circuit board must be very large, and the volume of the electric cooker is large

Method used

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  • Electric cooking appliance and heating control method thereof
  • Electric cooking appliance and heating control method thereof
  • Electric cooking appliance and heating control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] refer to Figure 1-4

[0031] An electric cooker includes a pot body A, a pot cover, an inner pot C, a heating device, a control device and a switching power supply. The heating device includes a relay temperature control mechanism and a thyristor temperature control mechanism. The relay temperature control mechanism includes a relay K1 and is connected to the relay The first heating tube H1, the thyristor temperature control mechanism includes the thyristor T1 and the second heating tube H2 controlled by the thyristor, the relay K1 and the thyristor T1 are controlled by the control device; the relay temperature control mechanism Cooperate with the thyristor temperature control mechanism to provide heating power.

[0032] The relay temperature control mechanism can be composed of a relay K1 and a first heating tube H1; it can also be composed of multiple relays K1 and multiple first heating tubes H1, and each relay K1 controls a corresponding first heating tube H1 . ...

Embodiment 2

[0052] refer to Figure 5

[0053] The heating control method of the electric cooker comprises the following steps:

[0054] 1), the control chip 8 sets the corresponding output power P according to the cooking mode and cooking stage selected by the user 0 , the output power P 0 pre-stored in the storage unit of the control chip 8;

[0055] 2) The current voltage is measured by the voltage effective value detection circuit 6, and the current voltage is input into the control chip 8. The first calculation unit calculates the power Pr of the first heating tube H1 under the current voltage, and the second calculation unit calculates the second power Pr under the current voltage. Heating tube H2 power Pt;

[0056] 3) The comparison unit compares P 0 and Pr, calculate P 0 The difference from Pr, and the ratio of the difference to Pt , and finally will Converted to the half-wave number N triggered by the thyristor T1;

[0057] 4) When the thyristor T1 is turned on, the ti...

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PUM

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Abstract

An electric cooker comprises a pot, a pot cover, an inner pot, a heating device, a control device and a switching power supply. The heating device comprises a relay temperature control mechanism and a thyristor temperature control mechanism. The relay temperature control mechanism comprises a relay and a first heating tube connected with the relay. The thyristor temperature control mechanism comprises a thyristor and a second heating tube controlled by the thyristor. The relay and the thyristor are controlled by the control device. A heating control method includes: setting output power P0; calculating power Pr of the first heating tube under current voltage; calculating difference between P0 and Pr, and converting ratio of the difference to Pt into thyristor-triggered semiwave number; counting the thyristor-triggered semiwave number; and acquiring current required output power. Excessive temperature rising of the thyristor can be avoided.

Description

technical field [0001] The invention relates to an electric cooker and a heating control method thereof. Background technique [0002] At present, smart rice cookers on the market usually use a relay to connect a heating plate, and adjust the average power of the heating plate by changing the duty cycle of the heating cycle of the heating plate according to the food cooking curve prestored in the controller. Or use a thyristor to connect a heating plate, and adjust the power of the heating plate by changing the trigger time of the thyristor according to the food cooking curve pre-stored in the controller. The disadvantages of this temperature control method are: 1. The power output of the heating plate is uneven, and the temperature fluctuates greatly with the opening and closing of the relay. 2. Because the voltage of the mains will fluctuate, even if the food uses the same heating duty cycle, the average power will be different, which will affect the cooking effect. When...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A47J36/24G05D23/19A47J36/00
Inventor 吴勇孟城城樊杜平
Owner ZHEJIANG SUPOR ELECTRICAL APPLIANCES MFG CO LTD
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