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Improved electric pressure cooker

An electric pressure cooker, an improved technology, applied in cooking utensils, household utensils, applications, etc., can solve the problems of small capacitive sensor pressure controllable range, large control error, inaccurate low-voltage detection, etc., to increase detection accuracy and anti-interference Performance, reduce the loss of nutrients, improve the effect of low pressure detection accuracy

Active Publication Date: 2011-04-20
HONGYANG HOME APPLIANCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, the difference between the capacitance value of the capacitance sensor and the parasitic capacitance value between the signal lines is small, the capacitance signal of the capacitance sensor cannot be detected, and it is also easily interfered by external signals, and the stability is poor, resulting in inaccurate low-voltage detection during cooking. big error problem
This results in poor taste of easily cooked food that needs to be cooked in a low-pressure state. This type of capacitive sensor has a small pressure controllable range and lacks practicability. Therefore, the anti-interference ability and pressure detection accuracy of the capacitive sensor of this technical solution There is still need for further improvement, and the applicant proposed a better improvement plan on the basis of in-depth study of its mechanism

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] like figure 1 , figure 2 An improved electric pressure cooker shown includes an outer pot 1, an inner pot 2, a pot cover 3 and a sealing ring 4 for closing the inner pot 2, an electric heating device arranged at the bottom of the inner pot 2, and the electric heating device for controlling the Working control circuit 6. The control circuit 6 includes a capacitive sensor 7 for detecting changes in cooking pressure. The capacitive sensor 7 is installed on the bottom of the outer pot 1 through a bracket 8 . The electric heating device is a heating plate 5, and an elastic metal plate 9 that resets the heating plate 5 is installed between the heating plate 5 and the outer pot 1. The heating plate 5 is provided with a displacement transmitting member 51. During cooking, as the cooking pressure rises, the inner pot 2 pushes the heating plate 5 downward to produce a displacement, and when the cooking pressure decreases, the elastic metal plate 9 pushes the heating plate 5 ...

Embodiment 2

[0028] like image 3 , Figure 4 An improved electric pressure cooker shown is basically the same as the application structure of the first embodiment, except that the three capacitive plates of the composite capacitive sensor include a moving plate 73, a lower plate 72 and an elastic pole. Plate 74. The movable pole plate 73 is fixedly connected with the displacement touch piece 51 arranged on the heating plate 5, the lower pole plate 72 is a fixed pole plate, installed on the sensor shell, the sensor shell is fixedly connected with the bracket 8, and the bracket 8 is fixedly installed on the outer pot 1 . The elastic pole plate 74 is arranged between the movable pole plate 73 and the lower pole plate 72, a low-voltage detection capacitor is formed between the elastic pole plate 74 and the movable pole plate 73, and a high-voltage detection capacitor is formed between the elastic pole plate 74 and the lower pole plate 72 . As the cooking pressure increases, the inner pot ...

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Abstract

The invention relates to an improved electric pressure cooker, which comprises an outer pot, an inner pot, a cover and a sealing ring for closing the inner pot, an electric heating device arranged at the bottom of the inner pot, a control circuit for controlling the work of the electric heating device, and a displacement transfer piece generating displacement changes along with the changes of cooking pressure, wherein the control circuit comprises a capacitance sensor for detecting the changes of the cooking pressure; the displacement transfer piece can drive a pole piece of the capacitance sensor to act, and the capacitance sensor is a combined capacitance sensor provided with three capacitor plates; and two signals are generated among the three capacitor plates to detect the changes of the pressure state of the electric pressure cooker. The improved electric pressure cooker improves the pressure control precision of the electric pressure cooker and improves cooking tastes of foods.

Description

technical field [0001] The invention relates to the technical field of pressure cooking, in particular to an improved electric pressure cooker. Background technique [0002] This application is an improvement plan based on the technical solutions of patents with application numbers CN200710153849.2, CN200710153850.5, CN200710153851.X, and CN200720158958.9. The electric pressure cooker of the above-mentioned patent realizes the real-time detection and control of the pressure by setting a capacitive sensor at the bottom of the pot or in the lid. taste. The capacitive sensors adopted in the technical solutions of the above-mentioned patents include two capacitive plates, one moving plate and one fixed plate. During operation, as the pressure gradually increases, the moving plate of the capacitive sensor gradually approaches the fixed plate. plate, the distance between the two capacitor plates gradually decreases, and the control circuit controls the pressure in the pot by det...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A47J27/086
Inventor 朱泽春蒋吉猛
Owner HONGYANG HOME APPLIANCES