CN201533757U - Electric pressure cooking appliance - Google Patents

Abstract

The utility model relates to an electric pressure cooking utensil. The pressure detection device comprises an elastic element, a magnetic material and a magnetic resistance sensor, wherein the elastic element is deformed under the action of pressure to generate displacement, the elastic element is arranged on the lower part of the inner pot or the pot cover, the magnetic material or the magnetic resistance sensor is arranged at a position capable of following the elastic element, the magnetic resistance sensor and the magnetic material are arranged adjacent to each other, and when the elastic element moves, the magnetic resistance sensor and the magnetic material are relatively displaced, and the magnetic resistance sensor is electrically connected with the control circuit. The utility model discloses when the electric pressure cooker receives the pressure change, also can produce corresponding relative angle or displacement change between magnetic material and the magnetic resistance sensor. The magnetic resistance sensor converts the change into an electric signal and inputs the electric signal into the control circuit, so as to control the work of the electric pressure cooking appliance. The utility model discloses the pressure measurement who establishes is with low costs, and sensitivity is high, and stability is good.

Description

A kind of electric pressure cooking appliance

Technical field

The utility model is a kind of electric pressure cooking appliance, belongs to the renovation technique of electric pressure cooking appliance.

Background technology

Electric pressure cooking saucepan in the market, its pressure detecting control device comprises: point detects, and promptly sets an operating pressure, when pot inner pressure reaches this pressure, stops heating.Electric pressure cooking saucepan with this structure, in work, different functions all is same operating pressure.As Chinese patent application number is disclosed electric pressure cooking saucepan in 98111725.2, and it installs magnetic pressure limiting valve, magnetic detecting element on electric pressure cooking saucepan.When pot inner pressure acquires a certain degree, the vibration of magnetic pressure limiting valve, magnetic detecting element is the signal of telecommunication with the conversion of motion of detected magnetic pressure limiting valve, the processing of the signal of telecommunication is controlled the heating plate work of electric pressure cooking saucepan by single-chip microcomputer.Its point of only having realized pressure detects, and can not realize detecting in real time requirement.And because the magnetic pressure limiting valve also possesses the exhaust pressure relief function, it might be plugged and not move, and causes carrying out pressure detecting.And in fact different food needs different operating pressures, just can reach better nutritive validity, as China Patent No. is the pressure-detecting device of disclosed electric pressure cooking saucepan in 200720049043.4, it is provided with displacement transducer between the electro-heat equipment of electric pressure cooking saucepan and shell, particularly inductive displacement transducer.Inductive displacement transducer comprises induction coil and inductor.When the electric pressure cooking saucepan pot inner pressure changes, its inductor is moved, make the electrical characteristics of induction coil change and produce electrical signal transfer and be converted into the relevant pressure value to central controller, and according to the needs of cooking electro-heat equipment is controlled by central controller, realize detecting in real time pot inner pressure, the purpose of control electric pressure cooking saucepan work.The shortcoming that it has overcome the pressure detecting of some detection realizes detecting in real time.But displacement transducer is owing to know-why reason own causes its sensitivity low, poor stability.Inductive displacement transducer particularly, induction coil be because the manufacturing process problem of himself causes precision to be difficult to control, and influenced by ambient temperature, humidity etc.And induction coil is metalwork, the manufacturing cost height.

The utility model content

The purpose of this utility model is to consider the problems referred to above and provides a kind of set pressure-detecting device can detect the electric pressure cooking appliance of pot inner pressure in real time.The set pressure-detecting device cost of the utility model electric pressure cooking appliance is low, highly sensitive, good stability.

The technical solution of the utility model is: electric pressure cooking appliance of the present utility model, include interior pot, electro-heat equipment, pot cover, outer pot, pressure-detecting device and control circuit thereof, wherein pot cover is fastened on the outer pot, interior pot is installed in the outer pot, electro-heat equipment is positioned at the bottom of pot, control circuit is electrically connected with electro-heat equipment, wherein above-mentioned pressure-detecting device includes and deforms under pressure and produce the flexible member of displacement, magnetic material, magnetoresistive transducer, wherein flexible member is installed on the bottom or pot cover of interior pot, magnetic material or magnetoresistive transducer be installed in can with the position of flexible member servo-actuated on, the setting adjacent one another are of magnetoresistive transducer and magnetic material, and when flexible member moves, between magnetoresistive transducer and the magnetic material relative displacement is arranged, magnetoresistive transducer is electrically connected with control circuit.

The pot bottom outside in above-mentioned electro-heat equipment is installed in, flexible member is arranged on the below of electro-heat equipment, and be fixed on the outer pot, electro-heat equipment is provided with pillar, above-mentioned magnetic material or magnetoresistive transducer are fixed on the pillar of electro-heat equipment, magnetoresistive transducer or magnetic material respective fixation are on outer pot, and magnetoresistive transducer and magnetic material setting adjacent one another are, and magnetoresistive transducer is electrically connected with control circuit.

Above-mentioned flexible member is installed on the pot cover, magnetic material or magnetoresistive transducer are fixed on the flexible member, magnetoresistive transducer or magnetic material respective fixation are on pot cover, and magnetoresistive transducer and magnetic material setting adjacent one another are, and magnetoresistive transducer is electrically connected with control circuit.

Above-mentioned magnetic material is a magnet, or conducting metal.

Above-mentioned control circuit comprises signal processing circuit, signal controlling output circuit, magnetic group sensor is electrically connected with the input of signal processing circuit, the input of signal controlling output circuit is electrically connected with the output of signal processing circuit, and the output of signal controlling output circuit (10) is electrically connected with electro-heat equipment.

Above-mentioned magnetoresistive transducer is the angular surveying magnetoresistive transducer.

Pressure control device of the present utility model when electric pressure cooking saucepan is stressed variation, also can produce corresponding relative angle or change in displacement between magnetic material and the magnetoresistive transducer owing to adopt the structure of magnetoresistive transducer and magnetic material.Magnetoresistive transducer is converted to the signal of telecommunication with this variation and inputs to signal processing circuit, and the signal controlling output circuit is electrically connected with signal processing circuit, and received signal treatment circuit signal is controlled the work of electric pressure cooking appliance with this; The utility model adopts magnetoresistive transducer, and they can be by the various physical quantitys in perception magnetic field, for example: direction, and the position, signal conversion is carried out in the variation of the isoparametric effective carrier of angle, reaches the purpose of real-time control.And magnetoresistive transducer itself possesses high sensitivity, high reliability, the advantage that cost is low.The utility model is that a kind of design is ingenious, function admirable, convenient and practical electric pressure cooking appliance.

Description of drawings

Fig. 1 is the structural representation of embodiment 1 of the present utility model.

Fig. 2 is the structural representation ofembodiment 2 of the present utility model.

Fig. 3 is a control principle block diagram of the present utility model.

The specific embodiment

Embodiment 1:

Structural representation of the present utility model comprises the pot cover 7 that is fastened on the outer pot 8 as shown in Figure 1, andpot 3 in being equipped with in the outer pot 8, electro-heat equipment 5 are arranged at below theinterior pot 3 and between the outer pot 8.This structure also comprisesflexible member 6 and control circuit,magnetic material 2 and the magnetoresistive transducer 1 that closes on it, and magnetoresistive transducer 1 is electrically connected with control circuit.Electro-heat equipment 5 is fixed on theflexible member 6, andflexible member 6 is fixed on the outer pot 8, andmagnetic material 2 is fixed on thepillar 9 of electro-heat equipment 5.Magnetoresistive transducer 1 is fixed on outer pot 8 inner and closemagnetic materials 2, and magnetoresistive transducer 1 is electrically connected with control circuit.When in the electric pressure cooking saucepan pot pressure being arranged,interior pot 3 promotes electro-heat equipments 5 downwardcompression elasticity elements 6, theflexible member 6 generation displacement that deforms under pressure, and drivemagnetic material 2 moves downward.Perhaps magnetoresistive transducer 1 is fixed on thepillar 9 of electro-heat equipment 5,magnetic material 2 is fixed on outer pot 8 inner and close magnetoresistive transducers 1, and principle is constant.

Above-mentionedmagnetic material 2 can be a magnet, and all can produce magnetic conductive metal etc. magnetic field or transmit the material in magnetic field.

The utility model operation principle is that when pot inner pressure changed,pot 3,flexible member 6,magnetic material 2 integral body moved down in pressure can promote.Magnet 2 can produce relative change in displacement with magnetoresistive transducer 1.Magnet 2 motions, the magnetic field at magnetoresistive transducer 1 place changes, and magnetoresistive transducer 1 utilizes magnetoresistance material can change its resistance value along with the change in magnetic field.By Huygens's electric bridge, the variation of resistance coefficient can be converted into the variation of pressure.And being converted to the signal of telecommunication with this variation, magnetoresistive transducer inputs to signal processing circuit, the signal controlling output circuit is electrically connected with signal processing circuit, received signal treatment circuit signal, detect and show pot inner pressure, thereby and the heating of control electro-heat equipment 5, control the work of electric pressure cooking appliance with this

Embodiment 2:

Structural representation of the present utility model as shown in Figure 2, the difference of its structure and embodiment 1 is that above-mentionedflexible member 6 is installed on the pot cover 7,magnetic material 2 or magnetoresistive transducer 1 are fixed on theflexible member 6, magnetoresistive transducer 1 ormagnetic material 2 respective fixation are on pot cover 7, and magnetoresistive transducer 1 andmagnetic material 2 settings adjacent one another are, magnetoresistive transducer 1 is electrically connected with control circuit.In the present embodiment,magnetic material 2 is fixed on the flexible member 6.Magnetoresistive transducer 1 is fixed in closemagnetic material 2 on the pot cover, and magnetoresistive transducer 1 is electrically connected with control circuit.When pot inner pressure changed, pressure can promoteflexible member 6,magnetic material 2 whole moving.

Above-mentionedmagnetic material 2 can be a magnet, and all can produce magnetic conductive metal etc. magnetic field or transmit the material in magnetic field.

The utility model operation principle is that when pot inner pressure changed, pressure can promoteflexible member 6,magnetic material 2 integral body move up.Magnetic material 2 can produce relative change in displacement with magnetoresistive transducer 1.Magnet 2 motions, the magnetic field at magnetoresistive transducer 1 place changes, and magnetoresistive transducer 1 utilizes magnetoresistance material can change its resistance value along with the change in magnetic field.By Huygens's electric bridge, the variation of resistance coefficient can be converted into the variation of pressure.And being converted to the signal of telecommunication with this variation, magnetoresistive transducer inputs to signal processing circuit, the signal controlling output circuit is electrically connected with signal processing circuit, received signal treatment circuit signal, detect and show pot inner pressure, thereby and the heating of control electro-heat equipment 5, control the work of electric pressure cooking appliance with this

The utility model utilizes the variation in magnetoresistive transducer perception magnetic field, by the various physical quantitys of magnetic field perception, and direction for example, the position, the isoparametric effective carrier of angle, physical quantity is directly changed into the output signal that needs.Detect the output signal variation by control circuit and reach real-time detection pot inner pressure, the purpose of control voltage power duty.

The physical quantity variation realization pressure real-time function that detect of magnetoresistive transducer that the foregoing description has just listed tool by the position.According to the principle and the characteristic of magnetoresistive transducer, be provided with as different physical quantitys such as direction, angles, be implemented on the electric pressure cooking saucepan product by variety of way, all can realize the utility model purpose.

Claims (6)

1. electric pressure cooking appliance, include interior pot (3), electro-heat equipment (5), pot cover (7), outer pot (8), pressure-detecting device and control circuit thereof, wherein pot cover (7) is fastened on the outer pot (8), interior pot (3) is installed in the outer pot (8), electro-heat equipment (5) is positioned at the bottom of pot (3), control circuit is electrically connected with electro-heat equipment (5), it is characterized in that including and deform under pressure and produce the flexible member (6) of displacement at above-mentioned pressure-detecting device, magnetic material (2), magnetoresistive transducer (1), wherein flexible member (6) is installed on the bottom or pot cover (7) of interior pot (3), magnetic material (2) or magnetoresistive transducer (1) be installed in can with the position of flexible member (6) servo-actuated on, magnetoresistive transducer (1) and magnetic material (2) setting adjacent one another are, and when flexible member (6) moves, between magnetoresistive transducer (1) and the magnetic material (2) relative displacement is arranged, magnetoresistive transducer (1) is electrically connected with control circuit.

2. electric pressure cooking appliance according to claim 1, it is characterized in that above-mentioned electro-heat equipment (5) is installed in interior pot (3) bottom outside, flexible member (6) is arranged on the below of electro-heat equipment (5), and be fixed on the outer pot (8), electro-heat equipment (5) is provided with pillar (9), above-mentioned magnetic material (2) or magnetoresistive transducer (1) are fixed on the pillar (9) of electro-heat equipment (5), magnetoresistive transducer (1) or magnetic material (2) respective fixation are on outer pot (8), and magnetoresistive transducer (1) and magnetic material (2) setting adjacent one another are, magnetoresistive transducer (1) is electrically connected with control circuit.

3. electric pressure cooking appliance according to claim 1, it is characterized in that above-mentioned flexible member (6) is installed on the pot cover (7), magnetic material (2) or magnetoresistive transducer (1) are fixed on the flexible member (6), magnetoresistive transducer (1) or magnetic material (2) respective fixation are on pot cover (7), and magnetoresistive transducer (1) and magnetic material (2) setting adjacent one another are, magnetoresistive transducer (1) is electrically connected with control circuit.

4. according to each described electric pressure cooking appliance of claim 1 to 3, it is characterized in that above-mentioned magnetic material (2) is a magnet, or conducting metal.

5. electric pressure cooking appliance according to claim 4, it is characterized in that above-mentioned control circuit comprises signal processing circuit (11), signal controlling output circuit (10), magnetic group sensor (1) is electrically connected with the input of signal processing circuit (11), the input of signal controlling output circuit (10) is electrically connected with the output of signal processing circuit (11), and the output of signal controlling output circuit (10) is electrically connected with electro-heat equipment (5).

6. electric pressure cooking appliance according to claim 4 is characterized in that above-mentioned magnetoresistive transducer (1) is the angular surveying magnetoresistive transducer.

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