WO2016077988A1

WO2016077988A1 - Electric pressure cooker and pressure detection circuit thereof

Info

Publication number: WO2016077988A1
Application number: PCT/CN2014/091377
Authority: WO
Inventors: 魏晓敏
Original assignee: 魏晓敏
Priority date: 2014-11-18
Filing date: 2014-11-18
Publication date: 2016-05-26
Also published as: CN205671927U

Abstract

An electric pressure cooker and a pressure detection circuit thereof. The circuit comprises: a magnetoresistor (1) used for outputting a detection signal, a floater (2) provided with a magnetic substance and triggering the magnetoresistor to generate a sensing signal, and a control chip (3) connected to the magnetoresistor (1) to determine the relationship between the pressure inside the cooker and the pressure outside the cooker according to the sensing signal. The pressure cooker and the pressure detection circuit thereof perform pressure detection by only using the magnetoresistor and the floater provided with the magnetic substance, and thus have simple structure, small size and quick response, can detect the pressure inside the cooker accurately in time, and have high reliability and long service life.

Description

Electric pressure cooker and pressure detecting circuit thereof

Technical field

The present application relates to the field of home appliances, and in particular to an electric pressure cooker and a pressure detecting circuit thereof.

Background technique

At present, as an upgraded product of the traditional pressure cooker and rice cooker, the electric pressure cooker is favored by more and more consumers. The electric pressure cooker combines the advantages of the pressure cooker and the rice cooker, and has the advantage that other cooking utensils cannot match, which can satisfy many advantages. In terms of cooking needs, it can quickly, safely and automatically realize a variety of cooking methods, and its energy-saving and nutritious characteristics are the direction pursued by modern people.

At the same time, the detection of the pressure in the electric pressure cooker is an important indicator to measure the performance of the electric pressure cooker. The existing pressure detection method in the electric pressure cooker is not timely and accurate, and the structure is complicated.

Summary of the invention

The present application aims to solve at least one of the above technical problems to some extent.

According to a first aspect of the present application, the present application provides an electric pressure cooker pressure detecting circuit including: a magnetic resistance for outputting a detection signal, a float provided with a magnetic substance and triggering the magnetic resistance to generate an induced signal, and The magnetic resistance is connected to determine a control chip in the pot and the pressure outside the pot according to the sensing signal.

Further, the magnetoresistance is connected to the control chip through a current limiting resistor.

Further, one end of the magnetoresistive is connected to the control chip, and the other end is grounded.

Further, the control chip is a PLC control chip or an FPGA control chip.

Further, the magnetic substance is a magnet or a magnet.

According to a second aspect of the present application, the present application provides an electric pressure cooker including a pressure detecting circuit, the pressure detecting circuit comprising: a magnetic resistance for outputting a detection signal, a magnetic substance is disposed, and the magnetic resistance is triggered to generate an induced signal a float, and a control chip coupled to the magnetoresistance to determine a pressure relationship between the inside of the pot and the outside of the pot based on the sensing signal.

Further, the control chip is a PLC control chip or an FPGA control chip.

Further, the magnetic substance is a magnet or a magnet.

The beneficial effects of the application are:

Providing an electric pressure cooker and a pressure detecting circuit thereof, the circuit comprising: a magnetic resistance for outputting a detection signal, a float provided with a magnetic substance and triggering the magnetic resistance to generate an induced signal, and being connected to the magnetic resistance according to Inductive signal judgment A control chip that breaks the pressure in the pot and the pressure outside the pot. In this way, since the pressure detection is performed only by using the magnetic resistance and the float provided with the magnetic substance, the structure is very simple, the volume is small, and the reaction is fast, and the pressure in the pot can be detected in time and accurately, the reliability is high, and the working life is long.

DRAWINGS

FIG. 1 is a schematic structural view of an electric pressure cooker pressure detecting circuit according to an embodiment of the present application.

detailed description

The embodiments of the present application are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are intended to be illustrative, and are not to be construed as limiting.

In the description of the present application, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation or position of indications such as "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. The relationship is based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of the description and the simplified description, and is not intended to indicate or imply that the device or component referred to has a specific orientation, and is constructed and operated in a specific orientation. It is not to be construed as limiting the application.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include one or more of the features either explicitly or implicitly. In the description of the present application, the meaning of "a plurality" is two or more unless specifically and specifically defined otherwise.

In the present application, the terms "installation", "connected", "connected", "fixed" and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless otherwise explicitly stated and defined. , or connected integrally; may be mechanical connection or electrical connection; may be directly connected, or may be indirectly connected through an intermediate medium, and may be internal communication between the two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood on a case-by-case basis.

In the present application, the first feature "on" or "under" the second feature may include direct contact of the first and second features, and may also include first and second features, unless otherwise specifically defined and defined. It is not in direct contact but through additional features between them. Moreover, the first feature "above", "above" and "above" the second feature includes the first feature directly above and above the second feature, or merely indicating that the first feature level is higher than the second feature. The first feature "below", "below" and "below" the second feature includes the first feature directly above and above the second feature, or merely the first feature level being less than the second feature.

The present application will be further described in detail below with reference to the accompanying drawings.

Referring to FIG. 1 , the present application provides an electric pressure cooker including a pressure detecting circuit. Specifically, the pressure detecting circuit includes: a magnetic resistance for outputting a detection signal, a magnetic substance is disposed, and the magnetic resistance 1 is triggered to generate an induced signal. The float 2, and the control chip 3 connected to the magnetoresistive 1 to determine the pressure in the pot and the pressure outside the pot according to the induced signal obtained by the magnetoresistive 1 inductive float.

In the present embodiment, the magnetoresistive resistor 1 is connected to the control chip 3 through a current limiting resistor R. One end of the magnetoresistive resistor 1 is connected to the control chip 3, and the other end is grounded.

Generally, the control chip 3 can be a PLC control chip or an FPGA control chip. The magnetic substance can be a magnet or a magnet.

In the present embodiment, the float 2 is spaced apart from the magnetoresistance 1. Since the distance is too far, the magnetoresistive 1 cannot sense the magnetic field generated by the magnetic substance in the float 2, and the magnetoresistive 1 is in the off state, and is used in the electric pressure cooker. In the process, when the pressure in the pot of the electric pressure cooker is greater than the pressure outside the pot, that is, greater than the external environment pressure, the pressure in the pot generates a thrust to push the float 2 close to the magnetoresistance 1, and when the float 2 approaches a certain distance from the magnetoresistance 1, the magnetic resistance 1 When the magnetic field generated by the magnetic substance in the float 2 is sensed, the magnetic resistance 1 is turned on. At this time, the magnetic resistance 1 and the control chip 3 and the ground form a loop, and the output near the first end of the magnetoresistive 1 is low. The level signal is sent to the control chip 3; when the pressure in the pot of the electric pressure cooker is reduced to be equal to the pressure outside the pot, the pressure in the pot cannot generate thrust to push the float 2, and the float 2 is away from the magnetoresistance 1, and the magnetoresistive 1 cannot be sensed. When the magnetic field generated by the magnetic substance in the float 2 is turned off, the magnetoresistive 1 is turned off. At this time, the magnetoresistive 1 cannot form a loop with the control chip 3 and the ground, and a high voltage is outputted near the first point of the magnetoresistive 1 at point A. Flat signal to control chip 3; control chip 3 output according to point A The high and low level signals determine the relationship between the pressure in the pot of the electric pressure cooker and the pressure outside the pot. When the control chip 3 receives the high level signal outputted from the point A, it is judged that the pressure in the pot of the electric pressure cooker is equal to the pressure outside the pot at this time. When the control chip 3 receives the low level signal outputted from the point A, it is judged that the pressure in the pot of the electric pressure cooker is greater than the pressure outside the pot at this time; thus, the control chip 3 can determine the pressure inside the pot according to the determined electric pressure cooker The corresponding operation is very timely and accurate.

The first end of the magnetoresistive resistor 1 is connected to the control chip 3 via the current limiting resistor R, and the current limiting resistor R mainly functions as a current limiting to avoid the circuit formed by the magnetoresistive resistor 1 and the control chip 3 when the magnetoresistive resistor 1 is turned on. If the current is too large, the magnetoresistive 1 and the control chip 3 are damaged due to a large current, the stability and reliability of the circuit are enhanced, and the magnetoresistive 1 and the control chip 3 are well protected.

In this way, since the pressure detection is performed only by using the magnetic resistance and the float provided with the magnetic substance, the structure is very simple, the volume is small, and the reaction is fast, and the pressure in the pot can be detected in time and accurately, the reliability is high, and the working life is long.

It should be noted that the installation position and the installation distance of the above-mentioned float 2 and the magnetic resistance 1 can be designed according to actual conditions. The magnetic resistance 1 can be grounded at one end and can be connected to a certain terminal in the control chip 3.

In the description of the present specification, reference is made to the descriptions of the terms "one embodiment", "some embodiments", "one embodiment", "some embodiments", "example", "specific examples", or "some examples" The specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the application. In the present specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

The above content is a further detailed description of the present application in conjunction with the specific embodiments, and the specific implementation of the present application is not limited to the description. For the ordinary person skilled in the art to which the present invention pertains, a number of simple deductions or substitutions may be made without departing from the spirit of the present application.

Claims

An electric pressure cooker pressure detecting circuit, comprising: a magnetic resistance for outputting a detection signal, a float provided with a magnetic substance and triggering the magnetic resistance to generate an induced signal, and connected to the magnetic resistance according to the A control chip that senses the relationship between the inside of the pot and the pressure outside the pot.
The detection circuit of claim 1 wherein said magnetoresistance is coupled to said control chip via a current limiting resistor.
The detecting circuit according to claim 1, wherein one end of said magnetoresistive is connected to said control chip and the other end is grounded.
The detecting circuit according to claim 1, wherein the control chip is a PLC control chip or an FPGA control chip.
The detecting circuit according to claim 1, wherein said magnetic substance is a magnet or a magnet.
An electric pressure cooker comprising a pressure detecting circuit, wherein the pressure detecting circuit comprises: a magnetic resistance for outputting a detection signal, a float provided with a magnetic substance and triggering the magnetic resistance to generate an induced signal, and The magnetic resistance is connected to determine a control chip in the pot and the pressure outside the pot according to the sensing signal.
The electric pressure cooker according to claim 1, wherein said magnetic resistance is connected to said control chip through a current limiting resistor.
The electric pressure cooker according to claim 1, wherein one end of said magnetoresistive is connected to said control chip and the other end is grounded.
The electric pressure cooker according to claim 1, wherein the control chip is a PLC control chip or an FPGA control chip.
The electric pressure cooker according to claim 1, wherein said magnetic substance is a magnet or a magnet.