CN109429397B

CN109429397B - Control system for energization range of induction cooker coil

Info

Publication number: CN109429397B
Application number: CN201710757888.7A
Authority: CN
Inventors: 王国庆
Original assignee: Shijiazhuang Yuzhao Technology Co ltd
Current assignee: Shijiazhuang Yuzhao Technology Co ltd
Priority date: 2017-08-29
Filing date: 2017-08-29
Publication date: 2021-07-13
Anticipated expiration: 2037-08-29
Also published as: CN109429397A

Abstract

The technical problem to be solved by the invention is to provide a control system of the heating range of the induction cooker, aiming at the technical defects, the technical method of inducing the pressure position through the pressure sensor and controlling the energizing range of the coil is adopted, the energy waste caused by the fact that the heating range of the traditional induction cooker is single and is not changed along with the change of the size of the cooker body is solved, and the technical effects of effectively utilizing the heating coil and reducing the leakage radiation are achieved; the technical problem that the sensitivity of the resistance strain gauge is affected when the resistance strain gauge works at high temperature is solved by adopting an electrical control technical method, the technical effect of prolonging the service life of the resistance strain gauge is achieved, and the technical effect of effectively selecting only one outgoing line to be electrified is achieved.

Description

Control system for energization range of induction cooker coil

Technical Field

The invention relates to the technical field of household appliances, in particular to a control system for the energizing range of an induction cooker coil.

Background

The electromagnetic oven heats the pan by utilizing electromagnetic radiation, and when the common electromagnetic oven works, the electromagnetic radiation generated by the coil not only heats the pan body on the oven surface, but also part of the electromagnetic radiation can be discharged outwards from the oven body which is not in contact with the pan body, so that the leaked electromagnetic radiation is generated, and the part of the electromagnetic radiation can harm human health. When the induction cooker is operated within 40cm, the distance can exceed the safety standard, and the induction cooker is easy to generate carcinogenic danger. But with increasing distance, the electromagnetic radiation decays rapidly. This requires that the distance of more than half a meter be kept when using the induction cooker.

In actual life, people inevitably contact the furnace body in a short distance when using the induction cooker, so that the effective reduction of the leakage electromagnetic radiation becomes the focus of the invention.

Disclosure of Invention

In order to solve the technical problems, the invention comprises the technical characteristics of a resistance strain type pressure sensor, a voltage amplifying circuit, a trigger unit, an electric automatic control module, an electromagnetic coil panel and an electromagnetic oven panel; the resistance strain type pressure sensor, the voltage amplifying circuit, the triggering unit, the electric automatic control circuit and the electromagnetic coil panel are electrically connected; the resistance strain type pressure sensor comprises a resistance strain gauge, and the resistance strain gauge is arranged on the lower side of the induction cooker panel;

the resistance strain type pressure sensor converts the detected pressure signal into a weak electric signal and transmits the weak electric signal to the voltage amplifying circuit; the voltage amplifying circuit amplifies the received weak electric signal; the trigger unit comprises a switch circuit and an electromagnetic relay, and the amplified electric signal transmits a trigger signal to the electromagnetic relay through the switch circuit; the electromagnetic coil panel comprises a branching end and an outgoing line, and the outgoing line is led out from the branching end and is connected with the output end of the electromagnetic relay; the electric automatic control module feeds back the trigger signal to the resistance strain type pressure sensor and simultaneously transmits the trigger signal to the outgoing line of the electromagnetic coil panel.

Further preferably, the electric automatic control module comprises a normally open button SB1, a normally closed button SB2, a relay KM0, a dynamic contact KM0, a dynamic break contact KMN, an electromagnetic relay KMN-1, a dynamic contact KMN-1, a dynamic break contact KMN-1 and a pressure sensor MN-1; the normally open button SB1, the normally closed button SB2 and the relay KM0 are connected in series, and the dynamic contact KM0 is connected in parallel at two ends of the normally open button SB 1; the dynamic contact KM0, the dynamic break contact KMN, the pressure sensor MN-1 and the electromagnetic relay KMN-1 are connected in series, and the dynamic contact KMN-1 is connected in parallel at two ends of the pressure sensor MN-1.

Further optimized, the wire distributing ends are uniformly arranged on circles with different radiuses and taking the center of the electromagnetic coil panel as the circle center.

And further optimizing, the resistance strain gauges vertically correspond to the branching ends, and the sensitivity of each resistance strain gauge is reduced along with the increase of the radius of each patch position.

Compared with the prior art, the invention has the following advantages: 1. the leakage radiation of the furnace body can be effectively reduced; 2. the electromagnetic coil panel is provided with at least two wire distributing ends, so that the heating range can be automatically induced according to the size of the pot bottom, and energy is saved; 3. in the electric automatic control circuit, the relay is self-locked at the moment of power-on, the pressure sensor is short-circuited, and the influence of high temperature and vibration on the working performance of the pressure sensor is effectively avoided; 4. the interlocking link is arranged in the electric automatic control module, so that a corresponding outgoing line can be effectively selected, two outgoing lines are prevented from being electrified simultaneously, and the stability of a magnetic field is ensured; 5. the sensitivity of the resistance strain gauge is reduced along with the increase of the radius of the position of the patch, and the sensing accuracy of the pressure sensor is improved.

Drawings

FIG. 1 is a system block diagram of a control system for the range of energization of an induction cooker coil;

FIG. 2 is a flow chart of the operation of a control system for the range of energization of the coil of an induction cooker;

FIG. 3 is a solenoid diagram of a control system for controlling the energization range of an induction cooker coil;

FIG. 4 is a diagram of a panel of an induction cooking range control system for an induction cooking range coil;

FIG. 5 is a schematic diagram of an electromagnetic oven electrical automatic control system for controlling the range of energization of an electromagnetic oven coil.

In the figure: 1. a resistance strain gauge pressure sensor; 101. a resistance strain gauge; 102. a measurement circuit; 2. a voltage amplifying circuit; 3. a trigger unit; 301. a switching circuit; 302. an electromagnetic relay; 4. an electric automatic control module; 5. an electromagnetic coil panel; 501. a branching end; 502. an outgoing line; 6. an induction cooker panel.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

The specific implementation mode is as follows: as shown in fig. 1-5, the pressure sensor comprises a resistance strain type pressure sensor 1, a voltage amplifying circuit 2, a trigger unit 3, an electric automatic control module 4, an electromagnetic coil panel 5 and an electromagnetic oven panel 6; the resistance strain type pressure sensor 1, the voltage amplifying circuit 2, the trigger unit 3, the electric automatic control circuit 4 and the electromagnetic coil panel 5 are electrically connected; the resistance strain type pressure sensor 1 comprises a resistance strain gauge 101, wherein the resistance strain gauge 101 is arranged on the lower side of the induction cooker panel 6;

the resistance strain type pressure sensor 1 converts the detected pressure signal into a weak electric signal and transmits the weak electric signal to the voltage amplifying circuit 2; the voltage amplifying circuit 2 amplifies the received weak electric signals; the trigger unit 3 comprises a switch circuit 301 and an electromagnetic relay 302, and the amplified electric signal transmits a trigger signal to the electromagnetic relay 302 through the switch circuit 301; the electromagnetic coil panel 5 comprises a branching end 501 and an outgoing line 502, wherein the outgoing line 502 is led out from the branching end 501 and is connected with the output end of the electromagnetic relay 302; the electric automatic control module 4 feeds back a trigger signal to the resistance strain type pressure sensor 1, and simultaneously transmits the trigger signal to an outgoing line 502 of the electromagnetic coil panel 5;

the electric automatic control module 4 comprises a normally open button SB1, a normally closed button SB2, a relay KM0, a dynamic contact KM0, a dynamic contact KMN, an electromagnetic relay KMN-1, a dynamic contact KMN-1 and a pressure sensor MN-1; the normally open button SB1, the normally closed button SB2 and the relay KM0 are connected in series, and the dynamic contact KM0 is connected in parallel at two ends of the normally open button SB 1; the dynamic contact KM0, the dynamic break contact KMN, the pressure sensor MN-1 and the electromagnetic relay KMN-1 are connected in series, and the dynamic contact KMN-1 is connected in parallel at two ends of the pressure sensor MN-1; the distributing ends 501 are uniformly arranged on circles with different radiuses and taking the center of the electromagnetic coil panel 5 as the center of a circle; the resistance strain gauges 101 are arranged on different circles with the center of the electromagnetic coil panel 5 as the center, the resistance strain gauges 101 vertically correspond to the branch terminals 501, and the sensitivity of each resistance strain gauge 101 decreases as the radius of each patch position increases.

When the electromagnetic induction cooker is used, as shown in fig. 3, the resistance strain gauge 101 is arranged at the upper part of the branching end 501, the resistance strain gauge 101 and the branching end 501 are on the same circle, the size of the pot bottom determines the induced resistance strain gauge 101, the sensitivity of each resistance strain gauge 101 is set to be reduced along with the increase of the radius, the sensitivity is effectively ensured to be in the contact range of the pot bottom and the electromagnetic oven panel 6, when the pot bottom contacts the panel, the resistance strain gauge 101 which is farthest from the circle center in the range of the pot bottom is deformed under stress, the measuring circuit 102 measures the voltage applied to the two ends of the resistance strain gauge and outputs a weak voltage signal, the voltage signal is amplified by a proper multiple through the amplifying circuit, the amplified voltage signal is transmitted to the corresponding electromagnetic relay 302, the electromagnetic relay 302 is powered on, and finally the trigger signal is transmitted to the corresponding outgoing line 502; as shown in fig. 5, when the normally open button SB1 is closed, the relay KM0 is energized, and the make contact KM0 is closed; placing a cooker, receiving a signal by a pressure sensor MN, enabling an electromagnetic relay KMN to be electrified, closing a dynamic contact KMN, self-locking the electromagnetic relay KMN, short-circuiting the pressure sensor, and disconnecting the dynamic contact KMN to form interlocking with a KMN-1; when the power is off, the normally closed button SB2 is pressed.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims

1. A control system for the energization range of an induction cooker coil, comprising: the device comprises a resistance strain type pressure sensor (1), a voltage amplifying circuit (2), a trigger unit (3), an electric automatic control module (4), an electromagnetic coil panel (5) and an electromagnetic oven panel (6); the resistance strain type pressure sensor (1), the voltage amplifying circuit (2), the trigger unit (3), the electric automatic control circuit (4) and the electromagnetic coil panel (5) are electrically connected; the resistance strain type pressure sensor (1) comprises a resistance strain gauge (101) and a measuring circuit (102), wherein the resistance strain gauge (101) is arranged on the lower side of the induction cooker panel (6), and the resistance strain gauge (101) is electrically connected with the measuring circuit; the resistance strain type pressure sensor (1) converts detected pressure signals into weak electric signals and transmits the weak electric signals to the voltage amplifying circuit (2); the voltage amplifying circuit (2) amplifies the received weak electric signals; the trigger unit (3) comprises a switch circuit (301) and an electromagnetic relay (302), and the amplified electric signal transmits a trigger signal to the electromagnetic relay (302) through the switch circuit (301); the electromagnetic coil panel (5) comprises a branching end (501) and an outgoing line (502), wherein the outgoing line (502) is led out from the branching end (501) and is connected with the output end of the electromagnetic relay (302); the electric automatic control module (4) feeds back a trigger signal to the resistance strain type pressure sensor (1) and transmits the trigger signal to the outgoing line (502) at the same time; the electric automatic control module (4) comprises a normally open button SB1, a normally closed button SB2, a relay KM0, a dynamic contact KMN 0, a dynamic contact KMN, an electromagnetic relay KMN-1, a dynamic contact KMN-1 and a pressure sensor MN-1; the normally open button SB1, the normally closed button SB2 and the relay KM0 are connected in series, and the dynamic contact KM0 is connected in parallel at two ends of the normally open button SB 1; the dynamic contact KM0, the dynamic break contact KMN, the pressure sensor MN-1 and the electromagnetic relay KMN-1 are connected in series, and the dynamic contact KMN-1 is connected in parallel at two ends of the pressure sensor MN-1; the distributing ends (501) are uniformly arranged on circles with different radiuses and taking the center of the electromagnetic coil panel (5) as the center of a circle; the resistance strain gauges (101) vertically correspond to the branching ends (501), and the sensitivity of each resistance strain gauge (101) decreases as the radius of each patch position increases.