CN201365820Y - Pressure displacement measuring and controlling device for electric heating cooking utensils - Google Patents

Abstract

The utility model relates to a displacement measurement and control device for electric pressure cookers. The displacement measurement and control device for electric pressure cookers does not require adjustment, is simple to assemble, has no drift, no decay, and has good reliability. The displacement measurement and control device for electric pressure cookers includes an electric cooker, which comprises: a gear transmission mechanism; a support plate with a recessed groove for the gear transmission mechanism provided on the plate surface, a bracket protruding perpendicularly to the edge of the long side of the groove; a measurement and control device fixedly arranged on the edge of the other long side of the groove of the support plate, one end of the gear transmission mechanism is coaxially connected to the measurement and control device, and the other end is connected to a rack that contacts a transmission member that generates downward displacement under the action of the pressure in the pot of the electric cooker, the gear transmission mechanism amplifies the displacement generated by the pressure in the pot of the elastically sealed electric cooker, and drives the measurement and control device; a control circuit that processes the output signal of the measurement and control device is used to amplify and process the output signal of the measurement and control device, and send it to a single-chip microcomputer to obtain real-time pressure information.

Description

Pressure displacement measurement and control device for electric cooking utensils

technical field

The utility model relates to a pressure displacement measurement and control device for an electric heating cooker.

Background technique

CN200510100475.9 discloses "a pressure detection method and detection device for an electric pressure cooker". Its purpose is to provide a method and device for continuously and accurately detecting and controlling the internal pressure of the electric pressure cooker by continuously measuring the deformation of the inner pot of the pressure cooker. Its technical composition: the pressure detection method of the electric pressure cooker uses a strain gauge as a detection device, places the strain gauge at an appropriate position in the space between the outer shell of the pressure cooker and the inner pot, and uses a transmission arm to sense the expansion of the inner pot When the inner pot expands due to high pressure, the transmission arm converts the expansion of the inner pot into a displacement, and pushes the elastic substrate of the strain gauge to deform accordingly; the deformed elastic substrate of the strain gauge makes the electrical characteristics of the sensitive foil attached to it It also changes accordingly; the controllable electrical signal generated due to the change of electrical characteristics is sent to the central controller; the central controller performs calculations on the received electrical signal, and outputs control signals and display signals. The pressure detection device of the electric pressure cooker is provided with a strain gauge and a transmission arm at an appropriate position in the space between the pressure cooker shell and the inner pot; one end of the transmission arm is in direct contact with the outer surface of the inner pot or the bottom surface of the heating plate, and the other end is in direct contact with the strain gauge. The elastic matrix of the gauge is in direct contact; the strain gauge is electrically connected to the central controller of the pressure cooker. Its shortcomings are: difficult to set, susceptible to interference, and there are problems such as creep compensation and temperature compensation.

CN200720055636.1 announced a "pressure detection device for electric pressure cooker". The purpose of the utility model is to provide a device which has good temperature resistance and can continuously detect and control the internal pressure of the electric pressure cooker by continuously measuring the displacement of the inner pot of the electric pressure cooker. Its technical composition: the pressure detection device of the electric pressure cooker, including a central controller, is characterized in that: a sliding resistor is set between the heating plate and the shell of the electric pressure cooker, and the sliding resistor includes a sliding resistance body and a sliding resistance A sliding electrode that slides on the body, the sliding resistor is electrically connected to the central controller; a transmission arm is set between the sliding resistor and the heating plate of the electric pressure cooker. Its disadvantages are: difficult to set, easy to wear and tear.

Utility model content

The purpose of the utility model is to overcome the shortcomings of the above-mentioned prior art, and provide a pressure displacement measurement and control device for electric cooking utensils that does not require adjustment, is simple to assemble, has no drift, no decay, and good reliability.

The purpose of this utility model can be achieved through the following measures:

The pressure displacement measurement and control device for electric cooking utensils, including electric heating cooking utensils, is special in that it includes:

A support plate, one of the plate surfaces is provided with a recessed slot for the gear transmission mechanism, and a bracket is protruded from one long side thereof perpendicular to it;

A measurement and control device, fixed on the edge of the other long side opposite to the long side bracket of the inlay groove of the support plate;

A gear transmission mechanism, one end of which is connected coaxially and linked with the measurement and control device, and the other end is connected with the rack that is in contact with the downward displacement transmission part under the action of the internal pressure of the electric heating cooker;

A control circuit, used to amplify the electrical signal generated by the displacement of the inner pot of the electric heating cooker, and send it to the single-chip microcomputer to obtain instant pressure information;

The gear rack of the gear transmission mechanism amplifies and converts the displacement generated by the inner pot of the elastically sealed electric heating cooker under pressure into rotational displacement through the transmission of the gear transmission mechanism, so that the coaxially connected measurement and control devices can obtain the displacement electric signal of the inner pot of the electric heating cooker ; The control circuit amplifies the signal and sends it to the single-chip microcomputer, and the single-chip microcomputer program controls the heating system of the electric heating cooker according to the pressure.

The purpose of this utility model can also be achieved through the following measures:

The measurement and control device is an angular displacement sensor.

The measurement and control device is a magnetic angle sensor.

The measurement and control device is a magnetic angle encoder or a mechanical rotary encoder.

The gear transmission mechanism consists of a coaxial stacked bull gear and a pinion gear, the bull gear meshes with the coaxially stacked gear of the measurement and control device, and the pinion gear meshes with the internal pressure of the electric cooking utensil to generate a downward displacement transmission member The rack in contact, the bracket located on the side of the slot of the support plate, the wheel shaft of the measurement and control device, the coaxially stacked large gear, and the pinion are perpendicular to the edge of the slot, and are respectively connected to the coaxial stack of the measurement and control device. It is composed of the outer end shaft of the gear and the hairspring spring fixed on the top surface of the bracket.

The control circuit includes: a measurement and control device, a single-chip microcomputer, an amplifying circuit, a resistor, a triode, a relay, and an electric heating plate, wherein: the output signal of the measurement and control device is obtained by the amplifying circuit, and two analog signals with phase differences are obtained and sent to the single-chip microcomputer for counting processing, and the triode The emitter of Q is grounded, the first output port of the single-chip microcomputer is connected to the base of the triode Q through the resistor R3, and the collector of the triode Q is controlled by the electric heating plate through the relay.

The control circuit includes: a measurement and control device, a single-chip microcomputer, a shaping circuit, a resistor, a triode, a relay, and an electric heating plate, wherein the output signal of the measurement and control device is obtained by the shaping circuit to obtain two incrementally coded pulse signals with phase differences and sent to the single-chip microcomputer for counting Processing, the emitter of the triode Q is grounded, an output port of the single chip microcomputer is connected to the base of the triode Q through the resistor R3, and the collector of the triode Q is controlled by a relay to control the electric heating plate.

Compared with the prior art, the utility model has the following advantages:

1. Easy to install, no adjustment required.

2. No drift, no decay.

3. Anti-jamming and good reliability.

Description of drawings

Fig. 1 is a block diagram of the utility model control principle.

Fig. 2 is a structural schematic diagram of the first embodiment of the pressure displacement measurement and control device for the electric heating cooker of the present invention.

Fig. 3 is a structural schematic diagram of the second embodiment of the pressure displacement measurement and control device for the electric heating cooker of the present invention.

FIG. 4 is a schematic structural diagram of the mechanical rotary encoder in FIG. 2 .

Fig. 5 is a pressure measurement and control circuit diagram of the first embodiment of the pressure displacement measurement and control device for the electric heating cooker of the present invention.

Fig. 6 is a pressure measurement and control circuit diagram of the second embodiment of the pressure displacement measurement and control device for the electric heating cooker of the present invention.

Detailed ways

The utility model will be described in further detail below in conjunction with the accompanying drawings:

Fig. 1, Fig. 2, Fig. 4 have shown the first embodiment of the present utility model.

Please refer to Fig. 1, in this embodiment, the pressure displacement measurement and control device of the electric heating cooker includes the electric heating cooker, which includes:

A support plate 1, one of its plate surface is provided with a recessed slot 11 for the gear transmission mechanism 3, and a bracket 12 is protruded vertically from one of its long sides;

A magnetic angle sensor 2 is fixed on the opposite long side edge of the long side bracket 12 of the supporting plate embedding groove;

A gear transmission mechanism 3, one end of which is coaxially connected and linked with the magnetic angle sensor 2, and the other end thereof is connected with a rack 34 that is in contact with a downward displacement transmission member (not shown in the figure) under the action of the internal pressure of the electric heating cooker;

A control circuit, which is used to amplify the electrical signal converted from the displacement of the inner pot of the electric heating cooker, and send it to the single-chip microcomputer to obtain instant pressure information;

The gear rack 34 of the gear transmission mechanism 3 amplifies the displacement generated by the inner pot of the elastically sealed electric heating cooker under pressure through the transmission of the gear transmission mechanism 3, and converts it into a rotational displacement, and then converts it through the magnetic angle sensor 2, thereby obtaining the electric heating cooker The electrical signal of the displacement of the inner pot; the control circuit amplifies the signal and sends it to the single-chip microcomputer, and the single-chip microcomputer program controls the heating system of the electric heating cooker according to the pressure.

The gear transmission mechanism 3 is composed of a coaxially stacked bull gear 31 and a pinion gear 32. The bull gear 31 meshes with the coaxially stacked gear 33 of the magnetic angle sensor 2, and its pinion 32 meshes with the internal pressure of the electric heating cooker. Under the action, the rack 34, which is in contact with the downward displacement transmission part, is located on the side of the slot of the support plate and is located between the axle 4 of the magnetic angle sensor 2, the coaxially stacked large gear 31, and the axle 5 of the pinion 32, which are perpendicular to the slot. The bracket 12 protruding from the edge is composed of the hairspring 6 fixed on the outer end shaft 4 of the stacked gear 33 coaxially with the magnetic angle sensor 2 and the top surface of the bracket 12 respectively.

Please refer to Figure 5, the control circuit includes: a magnetic angle sensor, a single-chip microcomputer, an amplifying circuit, a resistor, a triode, a relay, and an electric heating plate, wherein the magnetic angle sensor sends two analog signals with a phase difference obtained by the amplifying circuit to The emitter of the transistor Q is grounded, the first output port of the microcontroller is connected to the base of the transistor Q through the resistor R3, and the collector of the transistor Q is controlled by a relay.

Working principle: the gear rack 34 of the gear transmission mechanism 3 amplifies the displacement generated by the inner pot of the elastically sealed electric heating cooker under pressure through the transmission of the gear transmission mechanism 3, and converts it into a rotational displacement, and then converts it through the magnetic angle sensor 2, thereby Obtain the displacement electric signal in the pot of the electric heating cooker; the control circuit amplifies the signal and sends it to the single-chip microcomputer, and the single-chip computer program controls the heating system of the electric heating cooker according to the pressure.

Fig. 1, Fig. 3, Fig. 4, Fig. 6 have shown the second embodiment of the present utility model.

Please refer to Fig. 3 and Fig. 4, in this embodiment, the pressure displacement measurement and control device of the electric cooker includes an electric cooker, which includes:

A support plate 1, one of its plate surface is provided with a recessed slot 11 for the gear transmission mechanism 3, and a bracket 12 is protruded vertically from one of its long sides;

A magnetic angle encoder or a mechanical rotary encoder 2, which is fixed on the other long side edge of the long side bracket 12 opposite to the slotted slot of the support plate;

A gear transmission mechanism 3, one end of which is coaxially connected and linked with a magnetic angle encoder or a mechanical rotary encoder 2, and the other end of which is in contact with the downward displacement transmission member (not shown in the figure) under the action of the internal pressure of the electric cooking utensil Rack 34 connection;

A control circuit, which is used to transform the displacement of the inner pot of the electric heating cooker into a displacement signal, then shape it, and send it to the single-chip microcomputer to obtain instant pressure information;

The gear rack 34 of the gear transmission mechanism 3 amplifies the displacement generated by the inner pot of the elastically sealed electric heating cooker under pressure through the transmission of the gear transmission mechanism 3 and converts it into a rotational displacement, so that the magnetic angle encoder or mechanical rotary encoder 2 obtains the electric heating cooker. The displacement signal in the pot; the control circuit processes the signal and sends it to the single-chip microcomputer, and the single-chip microcomputer program controls the heating system of the electric cooker according to the pressure.

The gear transmission mechanism 3 is composed of a coaxial stacked bull gear 31 and a pinion gear 32, the bull gear 31 meshes with the coaxially stacked gear 33 of the magnetic angle encoder or mechanical rotary encoder 2, and its pinion gear 32 meshes. The gear rack 34 that is in contact with the downward displacement transmission part under the pressure of the electric cooker pot is located on the side of the support plate slot 11 and is located on the magnetic angle encoder or mechanical rotary encoder 2. The wheel shaft 4 and the coaxial stacked large gear 31 1. Between the wheel shafts 5 of the pinion 32, the bracket 12 protruding perpendicular to the edge of the slot is respectively connected to the outer end shaft of the coaxial stacked gear 33 of the magnetic angle encoder or the mechanical rotary encoder 2 and fixed on the top surface of the bracket 12. The hairspring spring 6 that establishes is formed.

Referring to Fig. 6, the control circuit includes: a magnetic angle encoder or a mechanical rotary encoder, a single-chip microcomputer, a shaping circuit, a resistor, a triode, a relay, and an electric heating plate, wherein the signals of the magnetic angle encoder or a mechanical rotary encoder are passed through The shaping circuit outputs two incrementally coded pulse signals with phase difference and sends them to the MCU for counting processing. The emitter of the transistor Q is grounded. The first output port of the MCU is connected to the base of the transistor Q through the resistor R3, and the collector of the transistor Q is passed through the relay. Control the hot plate.

Working principle: the gear rack 34 of the gear transmission mechanism 3 amplifies the displacement generated by the inner pot of the elastically sealed electric heating cooker under pressure through the transmission of the gear transmission mechanism 3 and converts it into a rotational displacement, so that the magnetic angle encoder or mechanical rotary encoder 2 Obtain the displacement signal in the pot of the electric heating cooker; the control circuit processes the signal and sends it to the single-chip microcomputer, and the single-chip computer program controls the heating system of the electric heating cooker according to the pressure.

The above descriptions are only preferred embodiments of the present utility model, and all equivalent deformations and modifications made according to the claims of the present utility model shall fall within the scope of the claims of the present utility model.

Claims (7)

1, a kind of electric-heating cooking utensil pressure displacement detecting and controlling device comprises electric-heating cooking utensil, it is characterized in that, comprises:

One support plate, its plate face are offered a caulking groove that supplies gear drive to be arranged with first, the perpendicular support that is convexly equipped with in the long edge, limit of one;

One observing and controlling device is installed in another relative edge, long limit of the long limit of support plate caulking groove support;

One gear drive, coaxial connection of one end and interlock observing and controlling device, its other end produces the tooth bar that touches to the bottom offset driving member down with the effect of electric-heating cooking utensil pot inner pressure and is connected;

One control circuit is used for a pot displacement in the electric-heating cooking utensil is become behind the displacement signal its processing, amplification, sends into single-chip microcomputer to obtain the pressure instant messages;

The displacement that the tooth bar of described gear drive produces pot pressurized in the elastic packing electric-heating cooking utensil amplifies and is converted to swing offset through the transmission of gear drive, makes the observing and controlling device of coaxial connection obtain the displacement signal of pot in the electric-heating cooking utensil; Control circuit its signal is amplified or handle after send into single-chip microcomputer, SCM program is controlled the electric-heating cooking utensil heating system according to pressure.

2, according to the described electric-heating cooking utensil pressure of claim 1 displacement detecting and controlling device, it is characterized in that: described observing and controlling device is an angular displacement sensor.

3, according to the described electric-heating cooking utensil pressure of claim 1 displacement detecting and controlling device, it is characterized in that: described observing and controlling device is the magnetic degree sensor.

4, according to the described electric-heating cooking utensil pressure of claim 1 displacement detecting and controlling device, it is characterized in that: described observing and controlling device is magnetic degree encoder or mechanical rotary encoder.

5, according to the described electric-heating cooking utensil pressure of claim 1 displacement detecting and controlling device, it is characterized in that: described gear drive is by the gear wheel of a coaxial closed assembly, pinion, its gear wheel meshes the gear with the coaxial closed assembly of observing and controlling device, its pinion and the effect of electric-heating cooking utensil pot inner pressure produce the tooth bar that touches to the bottom offset driving member down, be positioned at support plate caulking groove side and be positioned at observing and controlling device wheel shaft, coaxial closed assembly gear wheel, the support that is convexly equipped with perpendicular to the caulking groove edge between the wheel shaft of pinion, be connected to the coaxial closed assembly gear of observing and controlling device outer end axle and cantilever tip face on be used to eliminate the set hairspring spring in driving-chain gap and form.

6, according to the described electric-heating cooking utensil pressure of claim 1 displacement detecting and controlling device, it is characterized in that: described control circuit comprises: observing and controlling device, single-chip microcomputer, amplifying circuit, resistance, triode, relay, electric hot tray, wherein: observing and controlling device output signal is sent into single-chip microcomputer through the dephased analog signal of amplifying circuit acquisition two-way and is counted processing, the grounded emitter of triode Q, single-chip microcomputer one delivery outlet is through the base stage of resistance R 3 access triode Q, and the colelctor electrode of triode Q controls electric hot tray through relay.

7, according to the described electric-heating cooking utensil pressure of claim 1 displacement detecting and controlling device, it is characterized in that: described control circuit comprises: observing and controlling device, single-chip microcomputer, shaping circuit, resistance, triode, relay, electric hot tray, wherein: the output signal of observing and controlling device is sent into single-chip microcomputer through the dephased incremental encoding pulse signal of shaping circuit acquisition two-way and is counted processing, the grounded emitter of triode Q, single-chip microcomputer one delivery outlet is through the base stage of resistance R 3 access triode Q, and the colelctor electrode of triode Q controls electric hot tray through relay.

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