CN107342577A - Automatically power off control circuit and toaster - Google Patents
Automatically power off control circuit and toaster Download PDFInfo
- Publication number
- CN107342577A CN107342577A CN201710772106.7A CN201710772106A CN107342577A CN 107342577 A CN107342577 A CN 107342577A CN 201710772106 A CN201710772106 A CN 201710772106A CN 107342577 A CN107342577 A CN 107342577A
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- Prior art keywords
- switch
- control circuit
- control
- circuit
- automatically
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/027—Details with automatic disconnection after a predetermined time
Abstract
The present invention relates to one kind to automatically power off control circuit and toaster, including：First switch；First switch control circuit in parallel with the first switch, and controlling the first switch to be opened or closed；The second switch being connected in series with the first switch；The second switch control circuit in parallel with the second switch；After the first switch is uncontrolled, by the control of the second switch control circuit, to automatically power off the disconnection of control circuit described in realization.In the present invention, when it is described automatically power off that first switch goes wrong described in control circuit when, i.e. when the first switch can not disconnect, the disconnection that control circuit is automatically powered off described in realizing can be coordinated by the second switch and the second switch control circuit.
Description
Technical field
The present invention relates to automatic power-off protection circuit technical field, control circuit and more is automatically powered off more particularly to one kind
Scholar's stove.
Background technology
Toaster is a kind of automatic rusk oven, toaster.It is a kind of dedicated for bread is toasted again
Electric-heating cooking utensil.Rusk can be not only roasted into coke yellow by it, moreover it is possible to made its fragrance denseer more preferable with mouthfeel, improved a poor appetite.
Existing toaster by the mechanical electro-magnet switch control circuit of single channel, reaches baking time and upspring automatically so as to reach afterwards mostly
To power-off purpose.If toaster is in baking process because extraneous factor causes its lowering or hoisting gear after baking time is reached
It can not upspring automatically, the control circuit of toaster can not automatically power off, and toaster will continue to baking or even can cause fire etc.
Security incident.
The content of the invention
Based on this, it is necessary to the problem of can not being automatically powered off for control circuit, there is provided one kind automatically powers off control circuit
And toaster.
One kind automatically powers off control circuit, including：
First switch；
First switch control circuit in parallel with the first switch, and controlling the first switch to be opened or closed；
The second switch being connected in series with the first switch；
The second switch control circuit in parallel with the second switch；
It is described certainly with realization by the control of the second switch control circuit after first switch is uncontrolled
The disconnection of dynamic circuit breaker electric control circuit.
In one of the embodiments, in addition to：
The first control module electrically connected with the first switch control circuit and the second switch control circuit, it is described
First control module is used to issue control instruction for the first switch control circuit and the second switch control circuit.
In one of the embodiments, in addition to：
The clock control circuit electrically connected with first control module, the clock control circuit are used to be described first
Control module generates timing controling signal, and the timing controling signal is used to control the first switch control circuit and described the
Two ON-OFF control circuits.
In one of the embodiments, in addition to：
First control module mu balanced circuit, the first control module mu balanced circuit are electrically connected with first control module
Connect, for inputting stable operating voltage to first control module.
In one of the embodiments, in addition to：
For the power supply for automatically powering off control circuit power supply；And
With the power electric connection, the power supply stabilization circuit of burning voltage is provided for the power supply.
In one of the embodiments, in addition to：
The second control module electrically connected with the first switch control circuit；And
The 3rd control module electrically connected with the second switch control circuit；
Second control module and the 3rd control module are used for respectively described first switch control circuit and institute
State second switch control circuit and issue control instruction.
In one of the embodiments, in addition to：
The second clock control circuit electrically connected with second control module, the second clock control circuit is for being
Second control module generates timing controling signal, and the timing controling signal is used to control the first switch control electricity
Road.
In one of the embodiments, in addition to：
The 3rd clock control circuit electrically connected with the 3rd control module, the 3rd clock control circuit are used to give birth to
Into delay control signal, the delay control signal is used to control the second switch control circuit.
In one of the embodiments, the first switch is mechanical double-pole switch, in the first switch control circuit
Including electromagnet, the electromagnet realizes the control that the mechanical double-pole switch is opened or closed under different voltages；
The second switch is normally closed mechanical switch；
The second switch control circuit includes relay, controlled by the second switch control circuit it is described after
Electrical equipment is opened or closed.
In the present invention, when it is described automatically power off that first switch goes wrong described in control circuit when, i.e. described first opens
When pass can not disconnect, it can be coordinated by the second switch and the second switch control circuit and automatically power off control described in realizing
The disconnection of circuit processed.Specifically, the first switch and the second switch are connected in series, and in normal operating conditions, exchange
Control circuit is automatically powered off described in power input to return by the closure of the first switch, the second switch and load composition
Road, to the load supplying.When the first switch is uncontrolled to be chronically at closure state and can not recover, pass through described
Control circuit disconnection is automatically powered off described in the control of two ON-OFF control circuits.
A kind of toaster, including it is described above automatically power off control circuit, Canape lowering or hoisting gear and for heating
The heater of baking；
The Canape lowering or hoisting gear is connected respectively with the first switch and the second switch.
The control circuit that automatically powers off of the present invention is applied in toaster, if Canape after baking time is reached
Lowering or hoisting gear can not upspring automatically, and the first switch can not disconnect, and can pass through the second switch and the second switch
The heater of control circuit delays time to control toaster is realized and automatically powered off, and improves the safety in utilization of toaster, reduce by
The hidden danger of fire incident is caused in lasting baking.
Brief description of the drawings
Fig. 1 is the theory diagram for automatically powering off control circuit that one embodiment of the invention provides；
Fig. 2 is the theory diagram for automatically powering off control circuit that one embodiment of the invention provides；
Fig. 3 is the circuit diagram for automatically powering off control circuit that one embodiment of the invention provides；
Fig. 4 is the theory diagram for automatically powering off control circuit that one embodiment of the invention provides；
Fig. 5 is the circuit diagram for automatically powering off control circuit that one embodiment of the invention provides；
Fig. 6 is the state diagram for automatically powering off control circuit that one embodiment of the invention provides.
Drawing reference numeral explanation：
Automatically power off control circuit 10
First control module 100
First control module mu balanced circuit 110
Second control module 100a
3rd control module 100b
Second control module mu balanced circuit 110a
Clock control circuit 200
Second clock control circuit 200a
3rd clock control circuit 200b
Shunt resistance 300
First current-limiting resistance 310
Second current-limiting resistance 320
First switch control circuit 400
First switch 410
Second switch control circuit 500
Second switch 510
Relay 520
Power supply 600
Power supply stabilization circuit 610
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with drawings and Examples pair
The present invention's automatically powers off control circuit and toaster further description.It should be appreciated that specific implementation described herein
Example is not intended to limit the present invention only to explain the present invention.
Referring to Fig. 1, providing one kind automatically powers off control circuit 10, including：First switch 410；With the first switch
410 is in parallel, and the first switch control circuit 400 for controlling the first switch 410 to be opened or closed；With the first switch
410 second switches 510 being connected in series；The second switch control circuit 500 in parallel with the second switch 510；When described
One switch 410 it is uncontrolled after, by the control of the second switch control circuit 500, to automatically power off control described in realization
The disconnection of circuit.
It is appreciated that the first switch 410 can be double-pole switch, the two poles of the earth of the double-pole switch are connected to fire
On line and zero line.The first switch control circuit 400 can control the closure or off-state of the double-pole switch.More specifically
, the switch control elements such as electromagnet or motor can be included in the first switch control circuit 400.The second switch
510 can be normally closed switch, i.e., the second switch 510 is closure state under normal condition, described when being triggered by the external world
Second switch 510 can disconnect.The second switch control circuit 500 is in parallel with the second switch 510.In appropriate state
Under, the second switch control circuit 500 can control the break-make for automatically powering off control circuit 10.Specifically, it is described from
During dynamic circuit breaker 10 normal work of electric control circuit, the first switch control circuit 400 controls the first switch 410 to close, institute
Second switch 510 is stated to be off.The second switch control circuit 500 in parallel with the second switch 510 is in
Closure state.The loop that power supply, the first switch 410, the second switch 510 and load composition close, loads normal work
Make.When it is described automatically power off that first switch 410 goes wrong described in control circuit 10 when, the first switch 410 is not by institute
The control of first switch control circuit 400 is stated, the first switch 410 is in normally off.That is, the described nothing of first switch 410
When decision is opened, it can now be realized by the second switch 510 and the second switch control circuit 500 cooperation described automatic
The disconnection of power-off control circuit 10.Specifically, the second switch control circuit 500 can include switch element relay K1.
The relay K1 and the second switch 510 are connected in parallel.It is described when the first switch 410 is stuck, can not disconnected
Control circuit 10 is automatically powered off to disconnect to realize by disconnecting the second switch 510 and relay K1 in parallel therewith
The purpose for automatically powering off control circuit 10.It is appreciated that it can be not power control that the first switch 410 is uncontrolled
Or it can not be opened or closed smoothly by Mechanical course.
In the present embodiment, the control circuit 10 that automatically powers off is by setting the first switch 410, the first switch
Control circuit 400, the second switch 510 and the second switch control circuit 500 realize automatically controlling for circuit.Specifically
, the first switch 410 and the second switch 510 are connected in series, in normal operating conditions, described in AC power input
Closed-loop path of the control circuit 10 by the first switch 410, the second switch 510 and load composition is automatically powered off, is given
The load supplying.When the first switch 410 uncontrolled (being chronically at closure state) can not be recovered, pass through described
Two ON-OFF control circuits 500, which control, described to be automatically powered off control circuit 10 and disconnects.
In the present invention, the first switch 410, the first switch control circuit 400, the second switch 510 and institute
The setting for stating second switch control circuit 500 does not uniquely determine, as long as disclosure satisfy that the design concept of the present invention all in this hair
In bright protection domain.Such as：The first switch 410 can also be single-pole switch, and the second switch 510 can also be normal
Switch.
Referring to Fig. 2, in one of the embodiments, the control circuit 10 that automatically powers off also includes：With described first
ON-OFF control circuit 400 and the first control module 100 of the second switch control circuit 500 electrical connection, first control
Module 100 is used to issue control instruction for the first switch control circuit 400 and the second switch control circuit 500.
It is appreciated that first control module 100 can set control chip.Can in first control module 100
To control the first switch control circuit 400 and the second switch control circuit 500.Such as：First control module
100 can send high-level control signal to the first switch control circuit 400 and the second switch control circuit 500.
The first switch control circuit 400, which receives the high-level control signal, can control the first switch 410 to close.Institute
Relay 520 can be included by stating in second switch control circuit 500, the relay 520 is in parallel with the second switch 510.
The second switch control circuit 500, which receives the high-level control signal, can control the relay 520 to close.This
When, power supply, the control circuit 10 and load of automatically powering off can form the loop of closure, and load can be with normal work.Compare again
Such as, first control module 100 is also sent out to the first switch control circuit 400 and the second switch control circuit 500
Send low level control signal.When the first switch control circuit 400 receives low level control signal, it should control described
One switch 410 disconnects., can be by described but the first switch 410 is by extraneous stop when can not implement the action disconnected
When second switch control circuit 500 receives low level control signal, the relay 520 is controlled to disconnect.Here, described
Two switches 510 and the second switch control circuit 500 are in parallel, the second switch 510 and the second switch control circuit
500 are in off-state, make described to automatically power off control circuit 10 and be off.Now, power supply, described automatically power off
Control circuit 10 and load can not form the loop of closure, and load stops normal work.The selection of first control module 100
Can be the various chips that can realize control function.The chip model of specific first control module 100, which is not done, to be had
The restriction of body.In the present embodiment, the first switch control circuit 400 and described is controlled by first control module 100
Second switch control circuit 500 make it that circuit structure is simpler, and circuit controls definitely.
In one embodiment, the control circuit 10 that automatically powers off is divided for three kinds of states.Firstth, it is described to automatically power off
The holding state of control circuit 10, now the first switch 410 disconnect, the second switch 510 closes (normally off).This
When, the control circuit 10 that automatically powers off is off.Secondth, the described control circuit 10 that automatically powers off triggers moment, institute
State first switch 410 to close, the second switch 510 disconnects and (is triggered by normally off, be off), now described
Second switch control circuit 500 can form path the both ends of the second switch 510 are in parallel, make described to automatically power off control
Circuit 10 is in the conduction state.3rd, it is described when automatically powering off 10 break trigger of control circuit, two kinds of situations can be divided into again.
(1) first switch 410 is under normal circumstances：It is described when automatically powering off 10 break trigger of control circuit, the first switch control
Circuit 400 processed controls the first switch 410 to disconnect.The control of second switch control circuit 500 is connected in parallel on described second and opened
The circuit for closing 510 both ends disconnects.The second switch 510 is toggled to reply normally off by off-state, i.e., and described second
Switch 510 is in closure state.(2) in the case that the first switch 410 is uncontrolled：It is described to automatically power off control circuit 10
During break trigger, the first switch 410 can not disconnect.The second switch 510, which disconnects, (to be triggered by normally off, is in
Off-state).The second switch control circuit 500 control in parallel with the second switch 510 disconnects.Now, due to
The second switch 510 second switch control circuit 500 control in parallel disconnects so that described to automatically power off control circuit
10 can not form loop.By the second switch control circuit 500 being connected in parallel with the second switch 510, and it is described
The cooperation of first switch 410, the first switch control circuit 400, solve when the first switch 410 is uncontrolled,
It is described to automatically power off the problem of control circuit 10 disconnect automatically.
In one of the embodiments, the control circuit 10 that automatically powers off also includes：With first control module 100
The clock control circuit 200 of electrical connection, the clock control circuit 200 are used for for first control module 100 generation timing
Control signal, the timing controling signal are used to control the first switch control circuit 400 and the second switch to control electricity
Road 500.
Specifically, the clock control circuit 200 can be IC timing control circuits.The clock control circuit 200 can
To drive and control the first switch control circuit 400 and the second switch control circuit 500.The clock control circuit
200 to the first switch control circuit 400 and the output control signal of second switch control circuit 500.Described first opens
Closing control circuit 400 being opened or closed with the control first switch 410 of time segment.The second switch control electricity
Road 500 can also the control second switch 510 of time segment state is opened or closed.
In one embodiment, the timing control circuit 200 can also include：For receiving the people of operating and setting information
Machine interface input module；For producing the level controling signal generation module of high-level control signal or low level control signal；
For being electrically connected the control signal output module of simultaneously output control signal with control relay circuit and control circuit for electromagnet.
In one of the embodiments, the control circuit 10 that automatically powers off also includes：First control module mu balanced circuit
110.The first control module mu balanced circuit 110 electrically connects with first control module 100, for being controlled to described first
The stable operating voltage of the input of module 100.
Specifically, the first control module mu balanced circuit 110 will input stable work to first control module 100
Make voltage.Stable operating voltage can enable first control module 100 it is continual and steady to the first switch
Control circuit 400 and the second switch control circuit 500 send control signal, can improve and described automatically power off control circuit
10 overall reliability and stability.
In one of the embodiments, the control circuit 10 that automatically powers off also includes：Control electricity is automatically powered off to be described
The power supply 600 of road power supply；And electrically connected with the power supply 600, the power supply voltage stabilizing electricity of burning voltage is provided for the power supply 600
Road 610.
In one of the embodiments, the control circuit 10 that automatically powers off also includes：Step-down rectifying circuit.The decompression
Rectification circuit and load main current loop electrical connection, are handled AC power to obtain corresponding working power voltage.Institute
The setting for stating step-down rectifying circuit make it that the voltage at load both ends is more stable, adds the service life of load.
Specifically, circuit diagram as shown in Figure 3 can be set.In Fig. 3, the first switch control circuit 400 includes two
Pole pipe D3, the electromagnet TR in parallel with the diode D3 and with being connected after the diode D3 and the electromagnet TR parallel connections
Triode Q1.The first switch 410 is mechanical double-pole switch SW1.The second switch control circuit 500 includes diode
D4, the relay K1 in parallel with the diode D4 and three poles with being connected after the diode D4 and the relay K1 parallel connections
Pipe Q2.The second switch is normally closed mechanical switch 510.First control module 100 is control chip.First control
1 pin of module 100 and 8 pin connect the first control module mu balanced circuit 110.The first control module mu balanced circuit 110
Including diode D2, fixed carbon resister R5, electrochemical capacitor C3 and electric capacity C7.First control module 100 and the first switch
Control circuit 400 and described second switch control circuit 500 are electrically connected by shunt resistance 300 (R8 fixed carbon resisters).It is described
5th pin of the clock control circuit 200 Jing Guo first control module 100 electrically connects with first control module 100.It is described
Clock control circuit 200 includes：Fixed carbon resister R3, adjustable potentiometer VR1, electric capacity C6.The fixed carbon resister R3, the adjustable electric
The RC integrating networks of position device VR1 and electric capacity C6 compositions are the timing of the first control module 100.Wherein described adjustable potential
Device VR1 can set the different stalls of load (heater).The time of work timing length is set according to the difference of each gear
It is short.The power supply 600 will be loaded by the power regulator module 610 and access whole circuit.The power regulator module 610 wraps
Include：Metalfilmresistor R1, commutation diode D1, electrolytic capacitor filter C1, current-limiting resistance R2, voltage-regulator diode VZ1, filtering electrolysis
Electric capacity C2.Load (heater) sampling 12VA power supplys by the power regulator module 610 export+12V (DCVCC) and+
5V (DCVDD) powers to whole wiring board.
After the working time that first control module 100 is set completely, the of first control module 100
6 pin export low level control signal, divide two-way to export control signal by the shunt resistance 300 (R8 fixed carbon resisters).Its
In it is defeated all the way arrive the first switch control circuit 400, after the base stage of the triode Q1 obtains low level control signal
The triode makes Q1 be in cut-off state.The emitter stage of the triode Q1 is connected with the coil of the electromagnet TR, by
In the triode Q1 in cut-off state, the coil that VCC power supplys can not flow through the electromagnet TR cannot also produce electromagnetic force,
The electromagnet TR is in release conditions.Because extraneous factor is disturbed, it is easy to occur：Although the electromagnet TR is in and released
State is put, but can not be upspring automatically with the electromagnet TR structures being connected or device, therefore, the mechanical double-pole switch
SW1 is in normally off.
After the working time of first control module 100 setting, in the computer module of the first control module 100
The 6th pin equally export low level control signal, divide two-way control signal by the shunt resistance 300 (R8 fixed carbon resisters)
Output.It is defeated all the way in addition to arrive the second switch control circuit 500, described three in the second switch control circuit 500
Pole pipe Q2 base stage obtains making the triode Q2 be in cut-off state, the triode Q2 after same low level control signal
Emitter stage be connected with the coil of the relay K1, because the triode Q2 is in cut-off state, VCC power supplys can not flow
The coil of the relay K1 is crossed, the relay K1 contacts is switched to normally open by normally closed, can still cut off heating dress
Put with the connection of AC power live wire without occurring security incident, it is described automatically power off control circuit 10 serve it is anti-jamming
Protective effect.
It is described to automatically power off control circuit 10 in the course of the work, the high electricity of the 6th pin output of first control module 100
Flat control signal, divide two-way to export control signal by the fixed carbon resister R8, opened wherein signal is defeated all the way to described first
Control circuit 400 is closed, obtains making the triode Q1 be in full after high-level control signal in the base stage of the triode Q1
And conducting state, the emitter stage of the triode Q1 are connected with the coil of the electromagnet TR.Because the triode Q1 exists
Saturation conduction state, VCC power supplys 600 are by the coil of the electromagnet TR and the emitter and collector of the triode Q1
(conducting) and the ground wire of power supply stabilization circuit 610 composition loop.
The second switch control circuit 500 is output to by the another way control signal of the fixed carbon resister R8.Institute
The base stage for stating triode Q2 obtains making the triode Q2 be in saturation conduction state, three pole after high-level control signal
Pipe Q2 emitter stage is connected with the coil of the relay K1, because the triode Q2 is in saturation conduction state, VCC power supplys
600 by the line chart of the relay K1 and the emitter and collector (conducting) and power supply stabilization circuit of the triode Q2
610 ground wires form loop.VCC power supplys flow through the coil generating electromagnetic power adhesive of the relay K1, touch the relay K1
Point is in normally off.
Referring to Fig. 4, in one of the embodiments, the control circuit 10 that automatically powers off also includes：With described first
The second control module 100a that ON-OFF control circuit 400 electrically connects；And electrically connected with the second switch control circuit 500
3rd control module 100b；The second control module 100a and the 3rd control module 100b is used for respectively described first
ON-OFF control circuit 400 and the second switch control circuit 500 issue control instruction.
It is appreciated that the second control module 100a described in the present embodiment and the 3rd control module 100b are controlled respectively
The first switch control circuit 400 and the second switch control circuit 500.Under different mode of operations, pass through respectively
The second control module 100a and the 3rd control module 100b sends different control signals.In the present embodiment, set
Two control modules distinguish controlling switch circuit.
In one of the embodiments, the control circuit 10 that automatically powers off also includes：With second control module
Second clock the control circuit 200a, the second clock control circuit 200a of 100a electrical connections for described second for controlling mould
Block 100a generates timing controling signal, and the timing controling signal is used to control the first switch control circuit 400.
In one of the embodiments, the control circuit 10 that automatically powers off also includes：With the 3rd control module
3rd clock control circuit 200b of 100b electrical connections, the 3rd clock control circuit 200b are used to generate delays time to control letter
Number, the delay control signal is used to control the second switch control circuit 500.Can be with reference to the 3rd control module
The 100b and second clock control circuit 200a generates the delay control signal.
In the present embodiment, two clock control circuits are set.Second clock control circuit 200a and the 3rd clock control electricity
Road 200b each electrically connects with the second control module 100a and the 3rd control module 100b respectively.If described first
ON-OFF control circuit 400 includes electromagnet, and the second switch control circuit 500 includes relay.The second clock
Control circuit 200a can control electromagnet to produce with time segment by the second control module 100a output control signals
Electromagnetic force.3rd clock control circuit 200b can pass through the 3rd control module 100b output control signals with time segment
Control relay contact keeps normally closed or normally opened state.
In one of the embodiments, the first switch 410 is mechanical double-pole switch, the first switch control circuit
400 include electromagnet, and the electromagnet realizes the control that the mechanical double-pole switch is opened or closed under different voltages；
The second switch 510 is normally closed mechanical switch；
The second switch control circuit 500 includes relay 520, by the second switch control circuit 500 come
Control being opened or closed for the relay 520.
In one embodiment, referring to Fig. 5, described second can be controlled by the second clock control circuit 200a
Control module 100a exports the time of low level control signal.The second control module 100a exports low level control signal
When, the low level control of the 3rd control module 100b outputs can be controlled to believe by the 3rd clock control circuit 200b
Number than the second control module 100a output low level control signal to be delayed a period of time.The time of the delay can be with
It is arranged to 0~30 second or so.Pass through the first current-limiting resistance from the low level control signal of the second control module 100a outputs
310 (fixed carbon resister R4) arrive the first switch control circuit 400 low level control signal is defeated.From the 3rd control module
The low level control signal of 100b outputs is by second current-limiting resistance 320 (fixed carbon resister R18) low level control signal
It is defeated to arrive the second switch control circuit 500.When the base stage of the triode Q2 in the second switch control circuit 500 obtains
The triode Q2 is set to be in cut-off state after to low level control signal.The emitter stage of the triode Q2 and the relay
The coil of device 520 (relay K1) is connected, and because the triode Q2 is in cut-off state, VCC power supplys 600 can not flow through institute
The coil of relay 520 is stated, the contact of the relay 520 is switched to normally open by normally closed, can still cut off heating dress
The connection with AC power live wire is put without security incident occurs.That is, it is described automatically power off control circuit 10 realize it is anti-
Stuck protective effect.
In the second control module 100a outputs high-level control signal simultaneously, by the 3rd control module 100b the
1 pin exports high-level control signal.Institute is output to by the control signal of second current-limiting resistance 320 (R18 fixed carbon resisters)
State second switch control circuit 500.The second switch control circuit 500 includes (Q2 triodes, D5 diodes, K1 relays
Device).Obtain making the triode Q2 be in saturation conduction state after high-level control signal in the base stage of the triode Q2,
The emitter stage of the triode Q2 is connected with the coil of the relay K1, because the triode Q2 is in saturation conduction shape
State, VCC power supplys 600 are by the line chart of the relay K1 and the emitter and collector (conducting) and power supply of the triode Q2
The ground wire of mu balanced circuit 610 forms loop, and VCC power supplys 600 flow through the coil generating electromagnetic power adhesive of the relay K1, makes described
Relay K1 contacts are in normally off.
In one embodiment, the present invention provides a kind of toaster, including it is described above automatically power off control circuit 10,
Canape lowering or hoisting gear and the heater for heated baking.The Canape lowering or hoisting gear and the first switch 410
It is connected respectively with the second switch 510.
Specifically, one end of the Canape lowering or hoisting gear is connected by metal clips with the first switch 410.It is described
The other end of Canape lowering or hoisting gear is connected by metal clips with the second switch 510.The first switch 410 can be
Contact machinery double-pole switch, the galvanically machinery double-pole switch can be controlled by electromagnet TR switching electricity, can also
Controlled by the contact of the Canape lowering or hoisting gear touching mechanical double-pole switch.The second switch 510 can be normal
Closed switch, the normally closed switch are in closure state in the state of not triggering.The normally closed switch passes through the Canape
The metal clips connection of the lowering or hoisting gear other end, after Canape lowering or hoisting gear triggering is completed, it can control described normal
Close and switch off connection.
The control circuit 10 that automatically powers off of the present invention is applied in toaster, if bread after baking time is reached
Support lowering or hoisting gear can not upspring automatically, and the first switch 410 can not disconnect, can be by controlling the He of second switch 510
The second switch control circuit 500 disconnects to be automatically powered off to control the heater of toaster to realize, improves toaster
Safety in utilization, reduce because lasting baking causes the hidden danger of fire incident.
In one of the embodiments, the toaster can include：Canape lowering or hoisting gear, Canape lifting dress
Put the support hangar of top, the frizzen being connected with the Canape lowering or hoisting gear, heater and described automatically power off control
Circuit 10.Wherein, the control circuit 10 that automatically powers off includes：Electromagnet TR, mechanical double-pole switch 410 (SW1), relay K1
With normally closed mechanical switch 510 (SW2).Specifically, the control circuit 10 that automatically powers off can be arranged in the toaster, institute
State the lower position of Canape lowering or hoisting gear.A frizzen fixed can be set in the Canape lowering or hoisting gear, when
The Canape lowering or hoisting gear rise or it is descending during drive the frizzen to move up and down so that the normally closed machinery
Switch 510 (SW2) and be in closure or off-state.Specifically, the control circuit 10 that automatically powers off is applied to toaster
In, VCC power supplys flow through the coil generating electromagnetic power of the electromagnet TR, the suction iron plate on adhesive electromagnet, inhale iron plate and drive
Square support hangar hooks the Canape lowering or hoisting gear, and the Canape lowering or hoisting gear pushes down the mechanical double-pole switch simultaneously
SW1.The electromagnet TR overhead supports hook Canape lowering or hoisting gear.
In one embodiment, control circuit 10 is automatically powered off with reference to described, specifically describes the toaster at work
Control process.First control module 100 issues control signal, controls to the shunt resistance 300 (R8) and exports high electricity
Flat, the Canape lowering or hoisting gear is descending.The Canape lowering or hoisting gear can control the first switch during descending
Electromagnet TR adhesives in control circuit 400, the first switch 410 close.The second switch 510 is at normally closed type switch
In closure state.Simultaneously because shunt resistance 300 (R8) the output high level, can control the relay K1 to close.This
When, it is described automatically power off control circuit 10 whole loop it is in the conduction state.The second switch 510 is lifted by Canape and filled
Triggering is put, during the Canape lowering or hoisting gear is descending, the first switch 410 first closes, and is closed followed by electrical equipment K1, then
The second switch 510 disconnects.
The toaster that is there is provided in the embodiment of the present invention and control circuit 10 is automatically powered off, using relay K1 and normally closed machinery
510 parallels are switched, while are connected again with mechanical double-pole switch 410, are combined into combined circuit control heater
(load) is heated.In the case where Canape lowering or hoisting gear is stuck, and after baking time reaches, heating dress can be disconnected automatically
The AC power of (load) is put, so as to stop heating, prevents accident is stuck from causing disaster hidden-trouble, and circuit structure is simple.Add
Thermal can be heating monolithic rusk or heating multi-disc rusk；IC control chips output control signal is simultaneously
Drive two triodes, the adhesive and release of a control electromagnet, the normally opened and normally closed shape of another control relay contact
State.
Referring to Fig. 6, describe the operation principle of the toaster in detail under different working conditions with the toaster：
Firstth, under original state, the electromagnet TR does not work, and the mechanical double-pole switch 410 (SW1) disconnects.It is described
Normally closed mechanical switch 510 (SW2) works (being in closure state).The relay K1 does not work and (is off).It is described
Automatically power off control circuit 10 and connect with the mains and load (heater) and be in inc state, now, the heater
Do not work, the whole toaster is in holding state.
Secondth, described Canape lowering or hoisting gear be triggered state when, electromagnet TR work, the mechanical double-pole switch
410 (SW1) are closed.The normally closed mechanical switch 510 (SW2) works (being in closure state).The relay K1 work (is in
Closure state).The state that (heater) is in closure is connected with the mains and loaded to the control circuit 10 that automatically powers off, now,
The heater work.
3rd, the Canape lowering or hoisting gear is triggered under state, the electromagnet TR work, the mechanical double-pole switch
410 (SW1) are closed.The normally closed mechanical switch 510 (SW2) does not work and (is off).The relay K1 work (place
In closure state).The control circuit 10 that automatically powers off is connected with the mains and loaded (heater), and whole loop is in closure
State, now, the heater work, can generate heat baking bread.
4th, under the toaster normal operating conditions, the electromagnet TR work, the mechanical double-pole switch 410
(SW1) close.The normally closed mechanical switch 510 (SW2) does not work and (is off).The relay K1 work (is in
Closure state).The control circuit that automatically powers off is connected with the mains and loaded (heater), and whole loop is in the shape of closure
State, now, the heater work, can generate heat baking bread.
5th, in the state of the Canape lowering or hoisting gear is stuck.Now, the electromagnet TR does not work, the machine
Tool double-pole switch 410 (SW1) is constantly in closure state.The normally closed mechanical switch 510 (SW2) does not work (in disconnection shape
State).The relay K1 does not work and (is off).It is described automatically power off control circuit 10 and connect with the mains and load (add
Thermal), whole loop is in the state disconnected, and now, the heater does not work, and can avoid the electromagnet TR not
Energy adhesive (first switch 410 is uncontrolled), the phenomenon that the heater heats always.Avoid simultaneously due to the external world
Factor causes the Canape lowering or hoisting gear of the toaster can not be upspring automatically after baking time is reached, more scholars
Stove persistently toasts, or even causes the security incident of fire etc..Each technical characteristic of embodiment described above can be carried out arbitrarily
Combination, to make description succinct, combination not all possible to each technical characteristic in above-described embodiment is all described, so
And as long as contradiction is not present in the combination of these technical characteristics, all it is considered to be the scope of this specification record.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that come for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. one kind automatically powers off control circuit, it is characterised in that including：
First switch (410)；
First switch control electricity in parallel with the first switch (410), and controlling the first switch (410) to be opened or closed
Road (400)；
The second switch (510) being connected in series with the first switch (410)；
The second switch control circuit (500) in parallel with the second switch (510)；
After the first switch (410) is uncontrolled, by the control of the second switch control circuit (500), to realize
The disconnection for automatically powering off control circuit (10).
2. automatically power off control circuit as claimed in claim 1, it is characterised in that also include：
The the first control mould electrically connected with the first switch control circuit (400) and the second switch control circuit (500)
Block (100), it is the first switch control circuit (400) and the second switch control that first control module (100), which is used for,
Circuit (500) processed issues control instruction.
3. automatically power off control circuit as claimed in claim 2, it is characterised in that also include：
The clock control circuit (200) electrically connected with first control module (100), the clock control circuit (200) are used
In generating timing controling signal for first control module (100), the timing controling signal is used to control described first to open
Close control circuit (400) and the second switch control circuit (500).
4. automatically power off control circuit as claimed in claim 2, it is characterised in that also include：
First control module mu balanced circuit (110), the first control module mu balanced circuit (110) and first control module
(100) electrically connect, for inputting stable operating voltage to first control module (100).
5. automatically power off control circuit as claimed in claim 2, it is characterised in that also include：
For the power supply (600) for automatically powering off control circuit power supply；And
Electrically connected with the power supply (600), the power supply stabilization circuit (610) of burning voltage is provided for the power supply (600).
6. automatically power off control circuit as claimed in claim 1, it is characterised in that also include：
The second control module (100a) electrically connected with the first switch control circuit (400)；And
The 3rd control module (100b) electrically connected with the second switch control circuit (500)；
Second control module (100a) and the 3rd control module (100b) are used for respectively described first switch control
Circuit (400) and the second switch control circuit (500) issue control instruction.
7. automatically power off control circuit as claimed in claim 6, it is characterised in that also include：
The second clock control circuit (200a) electrically connected with second control module (100a), the second clock control electricity
Road (200a) is used to generate timing controling signal for second control module (100a), and the timing controling signal is used to control
The first switch control circuit (400).
8. automatically power off control circuit as claimed in claim 6, it is characterised in that also include：
The 3rd clock control circuit (200b) electrically connected with the 3rd control module (100b), the 3rd clock control electricity
Road (200b) generates delay control signal, and the delay control signal is used to control the second switch control circuit (500).
9. automatically power off control circuit as any one of claim 1-8, it is characterised in that
The first switch (410) is mechanical double-pole switch, and the first switch control circuit (400) includes electromagnet, institute
State electromagnet and the control that the mechanical double-pole switch is opened or closed is realized under different voltages；
The second switch (510) is normally closed mechanical switch；
The second switch control circuit (500) includes relay (520), passes through the second switch control circuit (500)
To control being opened or closed for the relay (520).
10. a kind of toaster, including control circuit, Canape lifting are automatically powered off as claimed in any one of claims 1-9 wherein
Device and the heater for heated baking；
The Canape lowering or hoisting gear is connected respectively with the first switch (410) and the second switch (510).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710772106.7A CN107342577A (en) | 2017-08-31 | 2017-08-31 | Automatically power off control circuit and toaster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710772106.7A CN107342577A (en) | 2017-08-31 | 2017-08-31 | Automatically power off control circuit and toaster |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107342577A true CN107342577A (en) | 2017-11-10 |
Family
ID=60215138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710772106.7A Pending CN107342577A (en) | 2017-08-31 | 2017-08-31 | Automatically power off control circuit and toaster |
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| Country | Link |
|---|---|
| CN (1) | CN107342577A (en) |
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|---|---|---|---|---|
| CN111029184A (en) * | 2019-12-16 | 2020-04-17 | 广东瑞德智能科技股份有限公司 | Switch device, baking device with switch device and household appliance |
| US10813496B2 (en) | 2017-07-07 | 2020-10-27 | Spectrum Brands, Inc. | Secondary circuit and timing device for appliance |
| WO2021073379A1 (en) * | 2019-10-14 | 2021-04-22 | 广东百胜图科技有限公司 | Toaster |
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| CN207542769U (en) * | 2017-08-31 | 2018-06-26 | 北美电器（珠海）有限公司 | Automatically power off control circuit and toaster |
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| WO2005084197A2 (en) * | 2004-02-27 | 2005-09-15 | Lasko Products, Inc. | Analytical response circuit interrupter |
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| US10813496B2 (en) | 2017-07-07 | 2020-10-27 | Spectrum Brands, Inc. | Secondary circuit and timing device for appliance |
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Application publication date: 20171110 |