CN209568277U - A kind of door lock detection circuit and washing machine - Google Patents
A kind of door lock detection circuit and washing machine Download PDFInfo
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- CN209568277U CN209568277U CN201821706887.6U CN201821706887U CN209568277U CN 209568277 U CN209568277 U CN 209568277U CN 201821706887 U CN201821706887 U CN 201821706887U CN 209568277 U CN209568277 U CN 209568277U
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Abstract
The utility model embodiment is related to door lock detection technique field, more particularly to a kind of door lock detection circuit and washing machine.The door lock detection circuit includes start-up circuit；Door interlock switch；Temperature detect switch (TDS)；Detection circuit, it includes the first bleeder circuit, the second bleeder circuit and test side, one end of first bleeder circuit is connect with DC power supply, the other end of first bleeder circuit is connect with one end of the second bleeder circuit, one end of door interlock switch and test side respectively, the other end of second bleeder circuit is grounded, and test side is for connecting controller.In the case where door interlock switch is in the open state, test side will export DC waveform, and in the case where door interlock switch is in closed state, test side will export AC wave shape.The current waveform got as a result, by controller can detect whether the door of washing machine of current laundry machine locks success, the monitoring for whether closing locking to door of washing machine realized.
Description
Technical field
The utility model embodiment is related to door lock detection technique field, more particularly to a kind of door lock detection circuit and
Washing machine.
Background technique
Currently, the development with science and technology with the improvement of people ' s living standards, various intelligent appliance equipment are in people
Life in popularize, the intelligent appliance especially as washing machine, basic every household can configure washing machine, be people
Life bring great convenience, wherein washing machine mainly includes roller washing machine.
But inventor is in the process of implementing the utility model, there are following technical problems for the discovery prior art: existing
Have in technology, roller washing machine could not detect whether door of washing machine closes locking, if the door of washing machine of roller washing machine does not have
Locking is closed, inner cylinder begins to operating, once user opens door of washing machine, hand is protruded into roller, and user may be by
Injury, so whether detection door of washing machine closes locking and be very important.
Utility model content
The utility model embodiment mainly solving the technical problems that provide a kind of door lock detection circuit and washing machine,
Aim to solve the problem that washing machine can not detect the problem of whether door of washing machine locks.
In a first aspect, in order to solve the above technical problems, the technical solution that the utility model embodiment uses is: mentioning
For a kind of door lock detection circuit, comprising:
Start-up circuit；
Door interlock switch, one end are connect with the start-up circuit；
Temperature detect switch (TDS) comprising temperature conditioning unit and switch unit, one end of the temperature conditioning unit and the door interlock switch
Other end connection, the other end of the temperature conditioning unit are connect with one end of extraneous firewire, the switch unit respectively, the switch
The other end of unit is connect with the load of the washing machine；
Detection circuit comprising the first bleeder circuit, the second bleeder circuit and test side, the one of first bleeder circuit
End connect with DC power supply, the other end of first bleeder circuit respectively with one end of second bleeder circuit, the door
One end of lock-switch is connected with the test side, the other end ground connection of second bleeder circuit；
Controller is connect with the test side.
Optionally, the detection circuit further includes protection circuit and voltage regulator circuit；
By the protection circuit connection between the door interlock switch and the other end of first bleeder circuit, described
It is connected between the other end of one bleeder circuit and the test side by the voltage regulator circuit.
Optionally, the protection circuit includes third bleeder circuit, first capacitor and the second capacitor；
One end of the third bleeder circuit is connect with one end of the door interlock switch, the third bleeder circuit it is another
End is connect with one end of the first capacitor, and the other end of the first capacitor is connect with one end of second capacitor, described
The other end of second capacitor is connect with one end of the other end of first bleeder circuit, second bleeder circuit respectively.
Optionally, the voltage regulator circuit includes first diode, the second diode, third capacitor and the 4th bleeder circuit；
The output end of the first diode is connect with DC power supply, the input terminal of the first diode respectively with it is described
The output end of second diode, the other end of the first bleeder circuit, one end of the second bleeder circuit, the third capacitor one end
It is connected with one end of the 4th bleeder circuit, the input end grounding of second diode, the other end ground connection of the third capacitor,
The other end of 4th bleeder circuit is connect with the test side.
Optionally, first bleeder circuit includes first resistor, and second bleeder circuit includes second resistance, third
Bleeder circuit includes 3rd resistor, and the 4th bleeder circuit includes the 4th resistance；
One end of the first resistor is connect with DC power supply, and the other end of the first resistor is electric with described second respectively
One end of resistance, second capacitor the other end connected with the test side, the other end of second resistance ground connection, described the
One end of three resistance is connect with one end of the door interlock switch, one end of the other end of the 3rd resistor and the first capacitor
Connection, one end of the 4th resistance are connect with the input terminal of the first diode, the other end of the 4th resistance and institute
State test side connection.
Optionally, the start-up circuit includes first switch tube, thyristor, the 4th capacitor, the 5th bleeder circuit and the 6th
Bleeder circuit；
One end of the thyristor is connect with one end of the door interlock switch, the other end of the thyristor respectively with it is described
One end of 4th capacitor, the 5th bleeder circuit one end connection, the control terminal of the thyristor, the 4th capacitor it is another
One end, the 5th bleeder circuit the other end connect with one end of the 6th bleeder circuit, the 6th bleeder circuit
The other end connect with the input terminal of the first switch tube, the output end of first switch tube ground connection, the first switch
The control terminal of pipe is for receiving open signal.
Optionally, the 5th bleeder circuit includes the 5th resistance, and the 6th bleeder circuit includes the 6th resistance, described
One end of 5th resistance is connect with the other end of the thyristor, the other end of the 5th resistance and the one of the 6th resistance
End connection, the other end of the 6th resistance are connect with the input terminal of the first switch tube.
Optionally, the first switch tube includes NPN triode.
Optionally, the door lock detection circuit further includes connector；
The connector is provided with first end, second end and third end, one end of the first end and the door interlock switch
Connection, the second end are connect with one end of the other end of the temperature conditioning unit, the switch unit respectively, and the second end is used
It is connect in firewire, the third end is connect with the other end of the switch unit, and the third end is used for and the washing machine
Load connection.
Second aspect, in order to solve the above technical problems, the technical solution that the utility model embodiment uses is: mentioning
For a kind of washing machine, comprising:
Door lock detection circuit as described above；
Load, with the door lock detection circuit, the load includes motor；
Washing machine body comprising door of washing machine, the door lock detection circuit and the load are all set in the laundry
In machine ontology, the door interlock switch of the door lock detection circuit is set on the door of washing machine.
The beneficial effect of the utility model embodiment is: being in contrast to the prior art, the utility model embodiment party
A kind of door lock detection circuit of formula, including start-up circuit；Door interlock switch, one end are connect with the start-up circuit；Temperature detect switch (TDS),
It includes temperature conditioning unit and switch unit, and one end of the temperature conditioning unit is connect with the other end of the door interlock switch, the temperature
The other end of control unit is connect with one end of extraneous firewire, the switch unit respectively, the other end of the switch unit and institute
State the load connection of washing machine；Detection circuit comprising the first bleeder circuit, the second bleeder circuit and test side, described first
One end of bleeder circuit is connect with DC power supply, the other end of first bleeder circuit respectively with second bleeder circuit
One end, the door interlock switch one end connected with the test side, the other end of second bleeder circuit ground connection, the detection
End is for connecting controller.In the case where the door interlock switch is in the open state, the test side will export DC waveform,
In the case where the door interlock switch is in closed state, the test side will export AC wave shape.It is obtained as a result, by controller
The current waveform got, can detect whether the door of washing machine of current laundry machine locks success, and realization is to door of washing machine
The no monitoring for closing locking.
Detailed description of the invention
One or more embodiments are illustrated by the picture in corresponding attached drawing, these are exemplary
Illustrate not constitute the restriction to embodiment, the element in attached drawing with same reference numbers label is expressed as similar member
Part, unless there are special statement, composition does not limit the figure in attached drawing.
Fig. 1 is the structural block diagram of the washing machine of the utility model embodiment；
Fig. 2 is the circuit diagram of the door lock detection circuit of the utility model embodiment.
Specific embodiment
For the ease of understanding the utility model, with reference to the accompanying drawings and detailed description, the utility model is carried out more
Detailed description.It should be noted that it can be directly in another element when element is expressed " being fixed on " another element
Upper or placed in the middle there may be one or more therebetween elements.When an element is expressed " connection " another element, it can
To be directly to another element or elements placed in the middle there may be one or more therebetween.This specification is used
Term "vertical", "horizontal", "left" and "right" and similar statement for illustrative purposes only.
Unless otherwise defined, technical and scientific term all used in this specification and the skill for belonging to the utility model
The normally understood meaning of the technical staff in art field is identical.Art used in the description of the utility model in this specification
Language is only for the purpose of describing specific embodiments, and is not intended to limitation the utility model.Art used in this specification
Language "and/or" includes any and all combinations of one or more related listed items.
Fig. 1 and Fig. 2 are please referred to, the utility model embodiment provides a kind of door lock detection circuit 100, is applied to laundry
On machine 200, door lock detection circuit 100 includes: start-up circuit 10, door interlock switch 20, temperature detect switch (TDS) 30, detection circuit 40, connection
Device 50 and controller 60.Wherein, start-up circuit 10 is connect with one end of door interlock switch 20, and start-up circuit 10 is defeated for receiving user
The enabling signal entered；Further, start-up circuit 10 includes first switch tube Q1, thyristor TR1, the 4th capacitor C4, the 5th point
Volt circuit 11 and the 6th bleeder circuit 12；One end of thyristor TR1 is connect with one end of door interlock switch 20, and thyristor TR1's is another
One end is connect with one end of the 4th capacitor C4, one end of the 5th bleeder circuit 11 and external power supply Neutra respectively, thyristor TR1
Control terminal, the other end of the 4th capacitor C4, the 5th bleeder circuit 11 the other end connect with one end of the 6th bleeder circuit 12
It connecing, the other end of the 6th bleeder circuit 12 is connect with the input terminal of first switch tube Q1, the output end ground connection of first switch tube Q1,
The control terminal of first switch tube Q1 is for receiving open signal.Optionally, the 5th bleeder circuit 11 include the 5th resistance R5, the 6th
Bleeder circuit 12 includes the 6th resistance R6, and one end of the 5th resistance R5 is connect with the other end of thyristor TR1, the 5th resistance R5's
The other end is connect with one end of the 6th resistance R6, and the other end of the 6th resistance R6 is connect with the input terminal of first switch tube Q1.It can
Choosing, first switch tube Q1 includes NPN triode.
Door interlock switch 20 is arranged on the door of washing machine of washing machine 200, and when door of washing machine is closed, then door interlock switch 20 closes
It closes, when door of washing machine is opened, then door interlock switch 20 disconnects.
Temperature detect switch (TDS) 30 includes temperature conditioning unit 31 and switch unit SW, and one end of temperature conditioning unit 31 is another with door interlock switch 20
One end connection, the other end of temperature conditioning unit 31 are connect with one end of extraneous firewire, switch unit SW respectively, and switch unit SW's is another
The load 300 of one end and washing machine connects；Start-up circuit 10 is for receiving open signal, when receiving open signal and door lock is opened
When closing 20 in closure, temperature detect switch (TDS) 30 will start to work, and temperature detect switch (TDS) 30 enters on state by off-state at this time, thus
Load 300 is connected with firewire, is embodied as 300 power supply of load, and then open the operating mode of washing machine 200.Optionally, temperature control
Switch 30 is thermistor switch, and temperature conditioning unit 31 is thermistor PTC.
Detection circuit 40 includes the first bleeder circuit 41, the second bleeder circuit 42 and test side J, the first bleeder circuit 41
One end is connect with DC power supply VCC, and the other end of the first bleeder circuit 41 is opened with one end of the second bleeder circuit 42, door lock respectively
One end of pass 20 is connected with test side J, and the other end ground connection of the second bleeder circuit 42, test side J is for connecting controller 60.It can
Choosing, the voltage value of DC power supply VCC is+5V.
Further, in order to enable detection circuit 40 is more stable, DC voltage reverse irrigation or voltage fluctuation are avoided, because
This, detection circuit 40 further includes protection circuit 43 and voltage regulator circuit 44；The other end of door interlock switch 20 and the first bleeder circuit 41
Between connected by protection circuit 43, connected between the other end and test side J of the first bleeder circuit 41 by voltage regulator circuit 44.
Protecting circuit 43 includes third bleeder circuit 431, first capacitor C1 and the second capacitor C2；One end of third bleeder circuit 431 with
One end of door interlock switch 20 connects, and the other end of third bleeder circuit 431 is connect with one end of first capacitor C1, first capacitor C1
The other end connect with one end of the second capacitor C2, the other end of the second capacitor C2 is another with the first bleeder circuit 41 respectively
One end connection at end, the second bleeder circuit 42.Voltage regulator circuit 44 includes first diode D1, the second diode D2, third capacitor
C3 and the 4th bleeder circuit 441；The output end of first diode D1 is connect with DC power supply VCC, the input of first diode D1
End respectively with the output end of the second diode D2, the other end of the first bleeder circuit 41, one end of the second bleeder circuit 42, third
One end of capacitor C3 is connected with one end of the 4th bleeder circuit 441, the input end grounding of the second diode D2, third capacitor C3's
Other end ground connection, the other end of the 4th bleeder circuit 441 are connect with test side J.Optionally, the first bleeder circuit 41 includes first
Resistance R1, the second bleeder circuit 42 include second resistance R2, and third bleeder circuit 431 includes 3rd resistor R3, the 4th partial pressure electricity
Road 441 includes the 4th resistance R4；One end of first resistor R1 is connect with DC power supply VCC, the other end difference of first resistor R1
It is connect with one end of second resistance R2, the other end of the second capacitor C2 and test side J, the other end ground connection of second resistance R2, the
One end of three resistance R3 is connect with one end of door interlock switch 20, and the other end of 3rd resistor R3 and one end of first capacitor C1 connect
It connects, one end of the 4th resistance R4 is connect with the input terminal of first diode D1, and the other end and test side J of the 4th resistance R4 connects
It connects.
Further, connector 50 is provided with first end, second end and third end, one end of first end and door interlock switch 20
Connection, second end are connect with one end of the other end of temperature conditioning unit 31, switch unit SW respectively, and second end is used to connect with firewire
It connects, third end is connect with the other end of switch unit SW, and third end with the load of washing machine 200 for connecting.
Controller 60 includes single-chip microcontroller, and I/O mouthfuls of one are connected to first switch tube Q1 and obtain control terminal, another I/O mouthfuls of company
It is connected to test side J, when user intends to open washing machine 200 by operations such as keys, controller 60 is receiving opening for user
After opening operation, control terminal of the high level to first switch tube Q1 will be sent, so that first switch tube Q1 is connected.
The realization principle of the utility model further explained below:
The first situation, in the state that door of washing machine is in and opens, i.e., feelings in the open state in door interlock switch 20
Under condition, test side J will test the DC voltage value being applied on the second bleeder circuit 42, and thus test side J will export direct current
Waveform, controller 60 will receive the DC waveform, so that it is determined that the door of washing machine of washing machine 200 is in the open state.
Second situation, after door of washing machine is in closed state, i.e., the case where door interlock switch 20 is in closed state
Under, the alternating voltage of firewire will be applied to test side J, and test side J will export AC wave shape, and controller 60 will receive the exchange
Waveform, so that it is determined that the door of washing machine of washing machine 200 is in closed state.At the same time, after firewire is grounded by start-up circuit
Temperature conditioning unit 31 is acted on, the switch unit SW in temperature detect switch (TDS) 30 is caused to be closed, so that firewire and washing machine 200 is negative
Connection is carried, load supplying is embodied as.
In the utility model embodiment, door lock detection circuit 100 includes start-up circuit 10；Door interlock switch 20, one
End is connect with start-up circuit 10；Temperature detect switch (TDS) 30 comprising temperature conditioning unit 31 and switch unit SW, one end of temperature conditioning unit SW with
The other end of door interlock switch 20 connects, and the other end of temperature conditioning unit SW is connect with one end of extraneous firewire, switch unit SW respectively,
The other end of switch unit SW is connect with the load of washing machine 200；Detection circuit 40 comprising the first bleeder circuit 41, second
One end of bleeder circuit 42 and test side J, the first bleeder circuit 41 are connect with DC power supply VCC, the first bleeder circuit 41 it is another
One end is connect with one end of the second bleeder circuit 42, one end of door interlock switch 20 and test side J respectively, the second bleeder circuit 42
Other end ground connection, test side J is for connecting controller 60；In the case where door interlock switch 20 is in the open state, test side J will
DC waveform is exported, in the case where door interlock switch 20 is in closed state, test side J will export AC wave shape.Pass through as a result,
The current waveform that controller 60 is got can detect whether the door of washing machine of current laundry machine 200 locks success, realize
The monitoring of locking whether is closed to door of washing machine.
Referring again to Fig. 1, another technical solution that the utility model embodiment uses is: providing a kind of washing machine
200 characterized by comprising door lock detection circuit 100 as above；Load 300, connect with door lock detection circuit 100, bears
Carrying 300 includes motor；Washing machine body (not shown) comprising door of washing machine (not shown), door lock detection circuit and load 300
It is all set in washing machine body, the door interlock switch of door lock detection circuit is set on door of washing machine.
The foregoing is merely the embodiments of the present invention, and therefore it does not limit the scope of the patent of the utility model, all
It is equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, directly or indirectly uses
In other related technical areas, it is also included in the patent protection scope of the utility model.
Claims (10)
1. a kind of door lock detection circuit is applied to washing machine characterized by comprising
Start-up circuit；
Door interlock switch, one end are connect with the start-up circuit；
Temperature detect switch (TDS) comprising temperature conditioning unit and switch unit, one end of the temperature conditioning unit are another with the door interlock switch
End connection, the other end of the temperature conditioning unit are connect with one end of extraneous firewire, the switch unit respectively, the switch unit
The other end connect with the load of the washing machine；
Detection circuit comprising the first bleeder circuit, the second bleeder circuit and test side, one end of first bleeder circuit with
DC power supply connection, the other end of first bleeder circuit are opened with one end of second bleeder circuit, the door lock respectively
One end of pass is connected with the test side, the other end ground connection of second bleeder circuit；
Controller is connect with the test side.
2. door lock detection circuit according to claim 1, which is characterized in that
The detection circuit further includes protection circuit and voltage regulator circuit；
By the protection circuit connection between the door interlock switch and the other end of first bleeder circuit, described first point
It is connected between the other end of volt circuit and the test side by the voltage regulator circuit.
3. door lock detection circuit according to claim 2, which is characterized in that
The protection circuit includes third bleeder circuit, first capacitor and the second capacitor；
One end of the third bleeder circuit is connect with one end of the door interlock switch, the other end of the third bleeder circuit with
One end of the first capacitor connects, and the other end of the first capacitor is connect with one end of second capacitor, and described second
The other end of capacitor is connect with one end of the other end of first bleeder circuit, second bleeder circuit respectively.
4. door lock detection circuit according to claim 3, which is characterized in that
The voltage regulator circuit includes first diode, the second diode, third capacitor and the 4th bleeder circuit；
The output end of the first diode is connect with DC power supply, and the input terminal of the first diode is respectively with described second
The output end of diode, the other end of the first bleeder circuit, one end of the second bleeder circuit, one end of the third capacitor and
One end of four bleeder circuits connects, the input end grounding of second diode, the other end ground connection of the third capacitor, described
The other end of 4th bleeder circuit is connect with the test side.
5. door lock detection circuit according to claim 4, which is characterized in that
First bleeder circuit includes first resistor, and second bleeder circuit includes second resistance, third bleeder circuit packet
3rd resistor is included, the 4th bleeder circuit includes the 4th resistance；
One end of the first resistor is connect with DC power supply, the other end of the first resistor respectively with the second resistance
One end, second capacitor the other end connected with the test side, the other end of second resistance ground connection, the third electricity
One end of resistance is connect with one end of the door interlock switch, and one end of the other end of the 3rd resistor and the first capacitor connects
Connect, one end of the 4th resistance is connect with the input terminal of the first diode, the other end of the 4th resistance with it is described
Test side connection.
6. door lock detection circuit according to claim 4, which is characterized in that
The start-up circuit includes first switch tube, thyristor, the 4th capacitor, the 5th bleeder circuit and the 6th bleeder circuit；
One end of the thyristor is connect with one end of the door interlock switch, and the other end of the thyristor is respectively with the described 4th
One end of capacitor, the 5th bleeder circuit one end connection, the control terminal of the thyristor, the 4th capacitor it is another
End, the 5th bleeder circuit the other end connect with one end of the 6th bleeder circuit, the 6th bleeder circuit
The other end is connect with the input terminal of the first switch tube, the output end ground connection of the first switch tube, the first switch tube
Control terminal for receiving open signal.
7. door lock detection circuit according to claim 6, which is characterized in that
5th bleeder circuit includes the 5th resistance, and the 6th bleeder circuit includes the 6th resistance, the 5th resistance
One end is connect with the other end of the thyristor, and the other end of the 5th resistance is connect with one end of the 6th resistance, institute
The other end for stating the 6th resistance is connect with the input terminal of the first switch tube.
8. door lock detection circuit according to claim 6, which is characterized in that
The first switch tube includes NPN triode.
9. door lock detection circuit according to claim 1, which is characterized in that the door lock detection circuit further includes connection
Device；
The connector is provided with first end, second end and third end, and the first end is connect with one end of the door interlock switch,
The second end is connect with one end of the other end of the temperature conditioning unit, the switch unit respectively, the second end be used for
Firewire connection, the third end are connect with the other end of the switch unit, and the third end is used for negative with the washing machine
Carry connection.
10. a kind of washing machine characterized by comprising
Door lock detection circuit as described in any one of claim 1 to 9；
Load, with the door lock detection circuit, the load includes motor；
Washing machine body comprising door of washing machine, the door lock detection circuit and the load are all set in the washing machine sheet
In vivo, the door interlock switch of the door lock detection circuit is set on the door of washing machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821706887.6U CN209568277U (en) | 2018-10-19 | 2018-10-19 | A kind of door lock detection circuit and washing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821706887.6U CN209568277U (en) | 2018-10-19 | 2018-10-19 | A kind of door lock detection circuit and washing machine |
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| Publication Number | Publication Date |
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| CN209568277U true CN209568277U (en) | 2019-11-01 |
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| CN201821706887.6U Active CN209568277U (en) | 2018-10-19 | 2018-10-19 | A kind of door lock detection circuit and washing machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113311270A (en) * | 2021-05-28 | 2021-08-27 | Tcl家用电器（合肥）有限公司 | Monitoring method and detection circuit of household appliance |
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2018
- 2018-10-19 CN CN201821706887.6U patent/CN209568277U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113311270A (en) * | 2021-05-28 | 2021-08-27 | Tcl家用电器（合肥）有限公司 | Monitoring method and detection circuit of household appliance |
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