CN201946954U

CN201946954U - Toaster protective circuit

Info

Publication number: CN201946954U
Application number: CN2011200765626U
Authority: CN
Inventors: 张北; 罗雁冰
Original assignee: Crastal Technology Shenzhen Co Ltd
Current assignee: Shenzhen Beiding Jinghui Science & Technology Co., Ltd.
Priority date: 2011-03-22
Filing date: 2011-03-22
Publication date: 2011-08-24
Anticipated expiration: 2021-03-22

Abstract

The utility model discloses a toaster protective circuit, and aims at providing a toaster protective circuit which has a function that when a handle is tightly clamped and can not bounce, a thermal fuse can be disconnected by other circuit modules, so as to stop power supply and working. The embodiment of the utility model is as follows: the toaster protective circuit comprises a voltage-dividing and rectifying filter module, an oscillation counting module, a coil driving module and an executive device, wherein the coil driving module receives a signal from the oscillation counting module; and the toaster protective circuit also comprises a voltage-reducing and rectifying filter module, a relay driving module and a relay, wherein the relay driving module receives the signal from the coil driving module to drive the relay to do action, and the relay controls the thermal fuse to work.

Description

The toaster protective circuit

Technical field

The utility model relates to a kind of toaster protective circuit, after particularly a kind of flap hand is stuck, can control the out-of-work toaster protective circuit of heating wire.

Background technology

The course of work of toaster circuit of the prior art is described as follows as shown in Figure 1: 1, depress flap hand, switch closure, heating wire energising work; 2, the voltage of about AC10V is provided to control circuit by heating wire tap dividing potential drop; 3, make performer (as armature) work through rectification filtering module, vibration counting module, coil drive module, promptly performer pins flap hand, and switch is kept closed; 4, vibration counting module timing time arrives, and the coil drive module disconnects the performer circuit, and promptly flap hand is upspring, and heating wire quits work.

This toaster circuit of prior art has the following disadvantages: if vibration counting module timing time arrives, driver module disconnects the performer circuit, can't upspring heating wire continuous firing then, the overheated and breaking out of fire of the bread that will make baking but flap hand is stuck.

So be badly in need of on the market a kind ofly at vibration counting module timing time then can't upspringing though flap hand is stuck, heating wire can be disconnected power supply by other circuit modules, stop the toaster protective circuit of heating work.

Summary of the invention

According to the deficiency that prior art exists, the purpose of this utility model is: provide when a kind of flap hand is stuck can't upspring, heating wire can be disconnected power supply, out-of-work toaster protective circuit by other circuit modules.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is as follows: a kind of toaster protective circuit, comprise dividing potential drop rectification filtering module, vibration counting module, coil drive module and performer, described coil drive module receives the signal from described vibration counting module, also comprises step-down rectifier filtration module, relay driving module and relay; Described relay driving module receives the signal from described coil drive module, drives the described actuating of relay; The work of described relay control heating wire.

Relay described in the technical program is a normally closed relay.

Filtering partial common in rectification filtering module of dividing potential drop described in the technical program and the described step-down rectifier filtration module.

Module of coil drive described in the technical program and described relay driving module drive by triode.

The filtration module of step-down rectifier described in the technical program comprises dropping resistor, rectifier diode and filter capacitor.

The beneficial effects of the utility model are: because the toaster circuit also comprises the relay of step-down rectifier filtration module, relay driving module and the work of control heating wire, so described vibration counting module timing time arrives, the coil drive module disconnects the performer circuit, but performer is stuck, when flap hand can't be upspring, described relay driving module receives the signal of described coil drive module simultaneously, drive the described actuating of relay, the heating wire that is toaster stops heating work, prevents the generation of fire.Though flap hand is not still upspring, heating wire has stopped heating work, has avoided the generation of fire incident.

Description of drawings

Fig. 1 is the work block diagram of toaster in the prior art;

Fig. 2 is the work block diagram of toaster in the utility model;

Fig. 3 is the physical circuit figure of Fig. 2.

Embodiment

In order to make technical problem to be solved in the utility model, technical scheme and beneficial effect clearer,, the utility model is further elaborated below in conjunction with embodiment and accompanying drawing.Should be appreciated that the described specific embodiment of this part only can be in order to explaining the utility model, and be not used in qualification the utility model.

As Fig. 2, shown in Figure 3, the formation of each module and annexation are in the toaster protective circuit in the utility model:

The dividing potential drop of dividing potential drop rectification filtering module partly is the two ends that are connected the part heating wire of toaster, be in the background technology by the heating wire tap and provide the voltage of about AC10V to control circuit, be filtered into the vibration counting module, coil drive module, performer L1 through the rectification of diode D1 and capacitor C 1 provides stable voltage again.The two ends of described capacitor C 1 also are connected with resistance R 2, and after the outage, capacitor C 1 is formed the loop with resistance R 2, and capacitor C 1 discharges electric energy to resistance R 2.

The step-down rectifier filtration module converts relay relay, the required burning voltage of relay driving module to after line voltage is passed through resistance R 1 step-down, diode D5 rectification, capacitor C 1 filtering.

Described capacitor C 1 is that described dividing potential drop rectification filtering module and described step-down rectifier filtration module are shared.

The two ends of described vibration counting module are connected the two ends of described dividing potential drop rectification filtering module, and described vibration counting module is by integrated chip IC control.This part is that prior art is given unnecessary details no longer in detail at this.

Described coil drive module drives for triode Q1, the base stage of described triode Q1 connects the integrated chip IC pin of vibration counting module by resistance R 11, the grounded emitter of described triode Q1, the collector electrode of described triode Q1 connects performer L1(such as armature) an end.

Described performer L1(such as armature) the other end connect the positive pole of capacitor C 1, the minus earth of described capacitor C 1.

Described relay driving module drives for triode Q2, and the base stage of described triode Q2 is by the collector electrode of the described triode Q1 of resistance R 4 connections, the grounded emitter of described triode Q2, the end of the collector connecting relay relay of described triode Q2.

The positive pole of another termination capacitor C 1 of described relay relay.

When depressing the flap hand of toaster, switch closure, energized, heating wire energising work, described dividing potential drop rectification filtering module, described step-down rectifier filtration module is exported stable voltage respectively, integrated chip IC begins counting in the described vibration counting module, the pin of described integrated chip IC sends the base stage of high level signal to the triode Q1 that is attached thereto, described triode Q1 conducting, the performer L1(such as the armature that link to each other with the collector electrode of described triode Q1) connect, the base stage of described triode Q2 is that low level is ended, and described performer L1 pins flap hand, and switch is kept closed.

When described integrated chip IC gate time arrives, the pin of described integrated chip IC sends the base stage of low level signal to the triode Q1 that is attached thereto, and described triode Q1 ends.There is dual mode that heating wire is quit work under the normal condition, first kind of mode is: the outage performer L1(armature that links to each other with the collector electrode of described triode Q1), described performer L1(armature) discharge flap hand, flap hand is upspring, switch disconnects, and heating wire quits work; The second way is: the base stage of the described triode Q2 that links to each other with the collector electrode of described triode Q1 is a high level, described triode Q2 conducting, the described relay relay energising action that is connected with the collector electrode of described triode Q2 disconnects the heating wire working power, and heating wire quits work.

If during the stuck fault that can't upspring of flap hand, above-mentioned first kind of mode can not the cut-off switch power supply, and heating wire is quit work; And the above-mentioned second way still can disconnect the working power of heating wire because of the influence that not whether upspring by flap hand, has so just avoided heating wire to continue the accident of heating bread initiation fire.

Claims

1. toaster protective circuit, comprise dividing potential drop rectification filtering module, vibration counting module, coil drive module and performer, described coil drive module receives the signal from described vibration counting module, it is characterized in that: also comprise step-down rectifier filtration module, relay driving module and relay; Described relay driving module receives the signal from described coil drive module, drives the described actuating of relay; The work of described relay control heating wire.

2. toaster protective circuit according to claim 1 is characterized in that: described relay is a normally closed relay.

3. toaster protective circuit according to claim 2 is characterized in that: the filtering partial common in described dividing potential drop rectification filtering module and the described step-down rectifier filtration module.

4. toaster protective circuit according to claim 3 is characterized in that: described coil drive module and described minute relay driving module are not driven by triode (Q1) and triode (Q2).

5. according to claim 1 or 2 or 3 or 4 described toaster protective circuits, it is characterized in that: described step-down rectifier filtration module comprises dropping resistor (R1), rectifier diode (D5) and filter capacitor (C1).