CN211321540U

CN211321540U - Temperature control and regulation circuit of high-power induction cooker

Info

Publication number: CN211321540U
Application number: CN202020177644.9U
Authority: CN
Inventors: 易改顺
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-02-17
Filing date: 2020-02-17
Publication date: 2020-08-21
Anticipated expiration: 2030-02-17

Abstract

The embodiment of the utility model discloses temperature control and regulation circuit of high-power electromagnetic oven, temperature control and regulation circuit includes full-bridge inverter circuit and heating coil L, can be according to how much or the length of cooking time of food weight during the cooking food, adjust heating coil L's switch-on number of turns when adjusting electromagnetic oven power, realize the area of synchronous regulation electromagnetic oven heating coil L, the maximum firepower accommodation process that makes its temperature control process that adjusts the temperature be close to traditional gas-cooker (firewood kitchen), both adjust the flame power (power), also adjust the flame area, make the cooking effect be close to or reach traditional cooking effect, and energy saving and consumption reduction more.

Description

Temperature control and regulation circuit of high-power induction cooker

Technical Field

The embodiment of the utility model provides a relate to domestic appliance technical field, concretely relates to temperature control and regulation circuit of high-power induction cooker.

Background

At present, almost all commercial high-power electromagnetic ranges have the problem that the cooking effect is inferior to that of a traditional gas stove (firewood stove), and besides the influence of a special cooker for the electromagnetic range, the temperature adjusting and temperature controlling function of the electromagnetic range, namely, the imperfect power adjusting mode is the main reason for influencing the cooking effect. These reasons are: the power of the electromagnetic stove is adjusted only by changing the temperature or the rising speed of the pot surface with the same area of the whole heating induction coil, but the temperature of different places with food and without food at the bottom of the pot can not be changed, so that the temperature of the place with food is proper, the temperature of the place without food is abnormal or rises at a very high speed, food scraps are burnt, the process that the traditional gas stove (firewood stove) can not adjust the firepower and adjust the size of the flame area according to the quantity of the food can not be realized.

SUMMERY OF THE UTILITY MODEL

Therefore, the embodiment of the utility model provides a temperature control and regulation circuit of high-power induction cooker to solve the current poor problem that leads to the cooking effect of high-power induction cooker temperature regulation and control function.

In order to achieve the above object, the embodiment of the present invention provides the following technical solutions: the utility model provides a temperature control and regulation circuit of high-power induction cooker, temperature control and regulation circuit includes full-bridge inverter circuit and heating coil L, full-bridge inverter circuit includes four IGBT pipe T1, T2, T3 and T4, and wherein IGBT pipe T1 and T2 link to each other and constitute left bridge arm, and IGBT pipe T3 and T4 link to each other and constitute right bridge arm, heating coil L sets up between the mid point of left bridge arm and right bridge arm, heating coil L one end is connected with the mid point of left bridge arm, all be provided with a plurality of on heating coil L's the different turns and take a percentage, take a percentage and be connected to the mid point of right bridge arm through electric capacity and the relay that concatenates all the way respectively.

Further, the temperature control and regulation circuit further comprises a high-frequency transformer B, and the heating coil L is connected to the middle point of the left bridge arm and the right bridge arm through the high-frequency transformer B.

Further, the high-frequency transformer B comprises a primary coil and a secondary coil, a first end of the primary coil is connected to the midpoint of the left bridge arm, a second end of the primary coil is connected to the midpoint of the right bridge arm, a first end of the heating coil L is connected to a first end of the secondary coil, a plurality of taps are arranged on the secondary coil with different turns, and the taps on the secondary coil are correspondingly connected with the taps on the heating coil L through a series capacitor and a relay.

Further, a capacitor is connected between the second end of the primary coil and the midpoint of the right bridge arm.

Further, a capacitor is connected between the first end of the secondary coil and the first end of the heating coil L.

Furthermore, the common collector of the IGBT transistors T1 and T3 is connected to the positive voltage input electrode, the common emitter of the IGBT transistors T2 and T4 is connected to the negative voltage input electrode, the emitter of the IGBT transistor T1 is connected to the collector of the IGBT transistor T2, the emitter of the IGBT transistor T3 is connected to the collector of the IGBT transistor T4, and the gates of the IGBT transistors T1, T2, T3 and T4 are connected to the driving circuit.

The embodiment of the utility model provides a have following advantage:

the embodiment of the utility model provides a temperature control and regulation circuit of high-power electromagnetic oven, temperature control and regulation circuit includes full-bridge inverter circuit and heating coil L, can be according to how much or the length of cooking time of food weight during the cooking food, when adjusting electromagnetic oven power, adjust heating coil L's switch-on number of turns, realize synchronous regulation electromagnetic oven heating coil L's area, the maximum firepower accommodation process that makes its temperature control process that adjusts the temperature be close to traditional gas-cooker (firewood kitchen), both transfer flame power (power), also transfer flame area, make the cooking effect be close to or reach traditional cooking effect, and energy saving and consumption reduction more.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.

Fig. 1 is a circuit diagram of a temperature control and regulation circuit of a high-power induction cooker according to embodiment 1 of the present invention.

Fig. 2 is a circuit diagram of a temperature control and regulation circuit of a high-power induction cooker according to embodiment 2 of the present invention.

Detailed Description

The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

The embodiment of the utility model provides a temperature control and regulation circuit of high-power induction cooker, as shown in figure 1, this temperature control and regulation circuit includes full-bridge inverter circuit, high frequency transformer B and heating coil L. The temperature control and regulation circuit is suitable for temperature regulation of a high-power concave electromagnetic stove.

The full-bridge inverter circuit comprises four IGBT tubes T1, T2, T3 and T4, wherein the IGBT tubes T1 and T2 are connected to form a left bridge arm, and the IGBT tubes T3 and T4 are connected to form a right bridge arm. Specifically, the common collector of the IGBT tubes T1 and T3 is connected to the positive voltage input electrode, the common emitter of the IGBT tubes T2 and T4 is connected to the negative voltage input electrode, the emitter of the IGBT tube T1 is connected to the collector of the IGBT tube T2, the emitter of the IGBT tube T3 is connected to the collector of the IGBT tube T4, and the gates of the IGBT tubes T1, T2, T3 and T4 are connected to the driving circuit. The diagonal lines of T1 and T4 and T2 and T3 are excited by a driving circuit to be alternately conducted, and direct current input voltage is converted into high-frequency square wave alternating current voltage, so that the heating coil L generates a magnetic field, countless small eddy currents are generated when magnetic force in the magnetic field passes through a metal body at the bottom of the iron pan, because the resistance of iron is small, large current can be generated, energy is rapidly generated by using the heat effect, and food can be heated when being placed in the pan.

The high-frequency transformer B comprises a primary coil and a secondary coil, wherein the first end of the primary coil is connected to the midpoint of the left bridge arm, the second end of the primary coil is connected to the midpoint of the right bridge arm, the first end of the heating coil L is connected to the first end of the secondary coil, a plurality of taps are arranged on the secondary coil with different turns, and the taps on the secondary coil are correspondingly connected with the taps on the heating coil L through a series capacitor and a relay.

In this embodiment, the secondary coil and the heating coil L are provided with three taps, which can realize the area adjustment of the three groups of heating coils L. And a capacitor C is connected between the second end of the primary coil and the midpoint of the right bridge arm. A capacitor C0 is connected between the first end of the secondary coil and the first end of the heating coil L, a capacitor C0 has coupling and resonance functions and transfers power, and the capacitor C0 and the primary coil maintain series resonance so that the working frequency is kept consistent with the frequency of the main circuit (20 KHz). Capacitors and relays, namely capacitors C1, C2 and C3 and high-performance relays J1, J2 and J3 in the figure 1 are connected between the tap on the secondary coil and the tap of the heating coil L connected with the secondary coil in sequence. C1, C2, C3 are different resonant capacitances matched according to different inductances of the heating coil with different turns.

The utility model discloses a temperature control and temperature regulation method of temperature control and temperature regulation circuit of high-power induction cooker, include: when the power of the induction cooker is adjusted, the turn-on number of the heating coil L is adjusted simultaneously under the working state of zero voltage and zero current of the IGBT tube, and the heating area of the heating coil L is changed synchronously when the power of the induction cooker is changed.

Specifically, when adjusting the electromagnetic stove power, adopt the method of frequency tracking, when IGBT pipe zero voltage switch and zero current switch state, according to the progress (%) of power adjust knob or progress bar, open or close the contact of special high performance relay of J1, J2, J3 in proper order (can only have a way to close), thereby change the area of heating coil L in step when changing heating power, can realize the firepower regulation mode similar to traditional gas-cooker, the flame area is smaller in the time of the small fire, the flame area is bigger in the time of the big fire.

Specifically, the number of turns of the heating coil L can be adjusted by manual or synchronous automatic control. When the main circuit regulates the power, the coil tap is manually and synchronously controlled to be switched on or switched off, or the main circuit can be designed to synchronously and automatically control (regulating the area of the power regulating coil) to regulate the temperature so as to adapt to large-scale application of a factory.

The embodiment of the utility model provides a temperature control and regulation circuit of high-power electromagnetic stove, temperature control and regulation circuit includes full-bridge inverter circuit, high frequency transformer B and heating coil L, how much or the length of cooking time according to food weight during cooking food, when adjusting electromagnetic stove power, adjust heating coil L's switch-on number of turns, realize synchronous regulation electromagnetic stove heating coil L's area, the maximum firepower accommodation process that makes its temperature control process that adjusts the temperature be close to traditional gas-cooker (firewood stove), both transfer the flame power (power), also transfer the flame area, make the cooking effect be close or reach traditional cooking effect, and energy saving and consumption reduction more.

Example 2

As shown in fig. 2, the temperature control and regulation circuit for a high-power induction cooker is different from that in embodiment 1 in that a high-frequency transformer B is not provided, and the temperature control and regulation circuit includes a full-bridge inverter circuit and a heating coil L, where the full-bridge inverter circuit includes four IGBT tubes T1, T2, T3 and T4, where the IGBT tubes T1 and T2 are connected to form a left arm, the IGBT tubes T3 and T4 are connected to form a right arm, the heating coil L is disposed between midpoints of the left arm and the right arm, one end of the heating coil L is connected to the midpoint of the left arm, a plurality of taps are disposed on different turns of the heating coil L, and the taps are respectively connected to the midpoint of the right arm through a series capacitor and a relay, that is capacitors C1, C2 and C3, and high-performance relays J1, J2 and J3 in fig. 2.

When the power of the electromagnetic stove is adjusted, a frequency tracking method is adopted, when the IGBT tube is in a zero-voltage switch state and a zero-current switch state, contacts (only one path of contact can be closed) of special high-performance relays of J1, J2 and J3 are sequentially opened or closed according to the progress (%) of a power adjusting knob or a progress bar, so that the area of a heating coil L is synchronously changed while the heating power is changed, a fire adjusting mode similar to a traditional gas stove can be realized, the area of a flame is smaller in small fire, and the area of the flame is larger in large fire. The number of turns of the heating coil L can be adjusted by manual or synchronous automatic control. When the main circuit regulates the power, the coil tap is manually and synchronously controlled to be switched on or switched off, or the main circuit can be designed to synchronously and automatically control (regulating the area of the power regulating coil) to regulate the temperature so as to adapt to large-scale application of a factory.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. The utility model provides a temperature control and regulation circuit of high-power induction cooker, its characterized in that, temperature control and regulation circuit includes full-bridge inverter circuit and heating coil L, full-bridge inverter circuit includes four IGBT pipe T1, T2, T3 and T4, and wherein IGBT pipe T1 and T2 link to each other and constitute left bridge arm, and IGBT pipe T3 and T4 link to each other and constitute right bridge arm, heating coil L sets up between the mid point of left bridge arm and right bridge arm, heating coil L one end is connected with the mid point of left bridge arm, all be provided with a plurality of on heating coil L's the different turns and take a percentage, take a percentage and be connected to the mid point of right bridge arm through the electric capacity and the relay that concatenate all the way respectively.

2. The temperature control and regulation circuit of the high-power induction cooker according to claim 1, wherein the temperature control and regulation circuit further comprises a high-frequency transformer B, and the heating coil L is connected to the middle point of the left bridge arm and the right bridge arm through the high-frequency transformer B.

3. The temperature control and regulation circuit of the high-power induction cooker according to claim 2, wherein the high-frequency transformer B comprises a primary coil and a secondary coil, a first end of the primary coil is connected to the midpoint of the left arm, a second end of the primary coil is connected to the midpoint of the right arm, a first end of the heating coil L is connected to a first end of the secondary coil, a plurality of taps are arranged on the secondary coil with different turns, and the taps on the secondary coil are correspondingly connected with the taps on the heating coil L through a series-connected capacitor and relay.

4. The temperature control and regulation circuit of the high-power induction cooker according to claim 3, wherein a capacitor is connected between the second end of the primary coil and the midpoint of the right bridge arm.

5. The temperature control and regulation circuit of the high-power induction cooker according to claim 3, wherein a capacitor is connected between the first end of the secondary coil and the first end of the heating coil L.

6. The temperature control and regulation circuit of a high-power induction cooker according to claim 1, wherein the common collector of IGBT tubes T1 and T3 is connected to the positive voltage input pole, the common emitter of IGBT tubes T2 and T4 is connected to the negative voltage input pole, the emitter of IGBT tube T1 is connected to the collector of IGBT tube T2, the emitter of IGBT tube T3 is connected to the collector of IGBT tube T4, and the gates of IGBT tubes T1, T2, T3 and T4 are connected to the driving circuit.