Electromagnet drive control circuit of heating electric appliance and heating electric appliance

A technology for driving control circuits and heating appliances. It is applied in the direction of electrical components and electric heating devices. It can solve problems such as low voltage at both ends of the coil, non-working toaster, electromagnetic noise pollution, etc., to reduce the opening speed, optimize the rising slope, The effect of extending the rising edge time

Pending Publication Date: 2021-02-23
GUANGDONG GALANZ GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The electromagnet control power supply of the existing toaster is obtained by low-cost resistance-capacitance step-down, and its voltage is greatly affected by the voltage fluctuation of the external input mains. When the mains voltage is relatively low, if the electromagnet 6 is continuously turned on The coil will cause the voltage at both ends of the coil to be low, so that when the attraction force of the electromagnet 6 is less than the rebound force of the toaster handle 4, the electromagnet 6 will be disconnected, and the handle 4 will rebound, so that the toaster will not work; In addition, when driving the electromagnet coil, if the driving frequency is too low (such as lower than 20K), the electromagnet coil will have high-frequency noise, causing electromagnetic noise pollution. If the driving frequency is too high (higher than 20K), that is, frequent drive switches Switching will cause the conduction test of EMC to exceed the limit value

Method used

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  • Electromagnet drive control circuit of heating electric appliance and heating electric appliance
  • Electromagnet drive control circuit of heating electric appliance and heating electric appliance
  • Electromagnet drive control circuit of heating electric appliance and heating electric appliance

Examples

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Effect test

no. 1 example

[0026] see Figure 1-Figure 2 , the electromagnet drive control circuit of the heating appliance, taking a toaster as an example, includes an electromagnet drive module A, an electromagnet switch module B, a timing circuit module E, an indicator light module F, an electromagnet power supply module C, and a control chip power supply Module D and the control chip U2, the control chip U2 is respectively connected to the electromagnet drive module A, the timing circuit module E and the indicator light module F, the electromagnet drive module A is connected to the electromagnet switch module B, and the electromagnet switch module B is used to control the mains The electromagnet power supply module C is connected between the mains and the control chip power supply module D. The electromagnet power supply module C is used to provide electric energy to the electromagnet switch module B, and the control chip power supply module D is used to provide power to the control chip U2. Electri...

no. 2 example

[0037] see Figure 3-Figure 4 , the electromagnet drive control circuit of the heating appliance, taking the toaster as an example, it is different from the first embodiment in that:

[0038] The electromagnet drive module A includes a resistor R1, a transistor Q1 and a button KEY, the first control signal output port DCT1 of the control chip U2 is connected to one end of the resistor R1, and the other end of the resistor R1 and the first end of the button KEY are connected to the transistor Q1 The base (B pole) of the button KEY is grounded, and the inside of the control chip U2 (single-chip microcomputer) is provided with a pull-up resistor, and the resistance value of the resistor R1 is smaller than the resistance value of the pull-up resistor.

[0039] In one cycle, when the electromagnet K1 is in the closed state, first set the first control signal output port DCT1 of the control chip U2 to the input state or the open-drain output state (open-drain means that there is no ...

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PUM

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Abstract

An electromagnet drive control circuit of a heating electric appliance comprises an electromagnet drive module, an electromagnet switch module, an electromagnet power supply module, a control chip power supply module and a control chip U2, and the electromagnet drive module is connected with the control chip U2 and the electromagnet switch module. The electromagnet power supply module is connectedwith the electromagnet switch module and the control chip power supply module, and the electromagnet switch module is connected with commercial power. According to the electromagnet drive control circuit, the electromagnet can be kept closed, meanwhile, electromagnet opening time is shortened, an input power supply voltage fluctuation of the electromagnet coil is small, the rising edge time of drive pulses input to a triode is prolonged, the opening speed of the triode is reduced, and the electromagnet coil does not generate a noise under the condition of passing through a high-frequency pulse and does not exceed a limit value of an EMC conduction test, and the conduction interference of the drive control circuit to a power grid is reduced.

Description

technical field [0001] The invention relates to the technical field of electromagnet drive control, in particular to an electromagnet drive control circuit of a heating appliance and the heating appliance. Background technique [0002] Many of the existing heating appliances use electromagnets to achieve power conduction, such as toasters, toasters (Toaster), also known as toasters, bread toasters or toasters, are a kind of Electric cooker specially designed for re-baking sliced ​​bread. see Figure 5 , the existing toaster comprises a housing 2, the housing 2 is provided with a heating chamber 1 for heating bread, the housing 2 is also provided with a control mechanism, the control mechanism includes a handle 4 (the operating end of the handle 4 is located in the shell outside the body 2), the handle 4 is provided with a spring 3, a magnetic sheet 5 and a switch starting block 7 in sequence, and one end of the handle 4 is connected with the first end of the spring 3; the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B1/02
CPCH05B1/02
Inventor 魏再平苏钦正
Owner GUANGDONG GALANZ GRP CO LTD
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