CN109828200A - A kind of method, apparatus and switch self-checking system of switch self-test - Google Patents
A kind of method, apparatus and switch self-checking system of switch self-test Download PDFInfo
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Abstract
Embodiment of the present invention is related to switch monitors technical field, more particularly to a kind of method, apparatus for switching self-test and switch self-checking system.This method comprises: judging whether door of washing machine closes；When door of washing machine is not turned off, control low pressure output；When door of washing machine is closed, High voltage output is controlled；Export pulse self-test signal；Judge whether to receive complete pulse self-test signal；When not receiving complete pulse self-test signal, then the not fully on self-detection result of safety switch is obtained, export halt instruction and issues early warning information.As a result, when door of washing machine is closed, lasting transmission pulse self-test signal, and whether real-time judge receives complete pulse self-test signal, when not receiving complete pulse self-test signal, then from detection safety switch failure, meet the requirement of more stable, more acurrate self-test.
Description
Technical field
Embodiment of the present invention is related to switch monitors technical field, more particularly to a kind of method, apparatus for switching self-test
And switch self-checking system.
Background technique
With the fast development of science and technology and national economy, the intelligent appliances such as washing machine are able to rapid proliferation and application,
When washing machine works, the interior bucket of washing machine is high speed rotation and charged belt water, and the safety switch of washing machine plays guarantee and presses
When this key, washing machine will stop operating and inside is completely with out electricity.So will lead to accident if safety switch failure
Accident occurs.
Safety switch failure includes mechanical switch trigger poor contact etc., is at present solution mechanical switch trigger
Because of the erroneous judgement that poor contact generates, replace switching using noncontacting proximity sensor.Master controller is by self-test signal, feedback
Signal sampling analysis reaches perception door-plate folding condition and plays security requirement.
In the implementation of the present invention, following problems exist in the prior art: existing in the present inventor
In technology, since noncontacting proximity sensor service life is limited, it is easy to produce aging and bad, gives washing machine controller to issue wrong
Accidentally feedback command.Noncontacting proximity sensor only meets level signal or frequency signal self-test.If workload bears high for a long time
Slight change can occur for voltage, the function and attribute of performance of device, so, the prior art be unable to satisfy it is more stable, more acurrate from
The requirement of inspection.
Summary of the invention
Embodiment of the present invention is mainly solving the technical problems that provide a kind of method, apparatus and switch for switching self-test
Self-checking system, it is intended to solve the requirement that the prior art is unable to satisfy more stable, more acurrate self-test.
In a first aspect, in order to solve the above technical problems, the technical solution that embodiment of the present invention uses is: providing one
The method of kind switch self-test, is applied to washing machine, comprising:
Judge whether door of washing machine closes；
When the door of washing machine is not turned off, control low pressure output；
When the door of washing machine is closed, High voltage output is controlled；
Export pulse self-test signal；
Judge whether to receive the complete pulse self-test signal；
When not receiving the complete pulse self-test signal, then the not fully on self-test knot of safety switch is obtained
Fruit exports halt instruction and issues early warning information.
Optionally, described when the door of washing machine is not turned off, after controlling the step of low pressure exports, the method is also
Include:
Judge whether to receive low voltage level detection signal；
When receiving the low voltage level detection signal, then early warning information is issued.
Optionally, it is described when the door of washing machine close when, control High voltage output the step of after, the method is also wrapped
It includes:
Judge whether to receive high voltage level detection signal；
When not receiving the high voltage level detection signal, then exports halt instruction and issue early warning information.
Optionally, the halt instruction stops operating for controlling motor.
Second aspect, in order to solve the above technical problems, the technical solution that embodiment of the present invention uses is: providing one
The device of kind switch self-test, is applied to washing machine, comprising:
First judgment module, is used to judge whether door of washing machine to close；
First control module is used for when the door of washing machine is not turned off, control low pressure output；
Second control module is used to control High voltage output when the door of washing machine is closed；
First output module is used to export pulse self-test signal when the door of washing machine is closed；
Second judgment module is used to judge whether to receive the complete pulse self-test signal；
Second output module is used to then obtain safety switch when not receiving the complete pulse self-test signal
Not fully on self-detection result exports halt instruction and issues early warning information.
Optionally, described device further include:
Third judgment module is used to judge whether to receive low voltage level detection signal；
Third output module is used to then issue early warning information when receiving the low voltage level detection signal.
Optionally, described device further include:
4th judgment module is used to judge whether to receive high voltage level detection signal；
4th output module is used to then export halt instruction simultaneously when not receiving the high voltage level detection signal
Issue early warning information.
Optionally, the halt instruction stops operating for controlling motor.
The third aspect, in order to solve the above technical problems, the technical solution that embodiment of the present invention uses is: providing one
Kind switch self-checking system, comprising:
Safety switch；
Self-checking circuit is connect with the safety switch；
Controller is connect with the self-checking circuit, and the controller is for judging whether door of washing machine closes, when described
When door of washing machine is not turned off, control low pressure output controls High voltage output when the door of washing machine is closed, when High voltage output,
The controller is also used to export pulse self-test signal, and judges whether to receive the complete pulse self-test signal, when not
When receiving the complete pulse self-test signal, then the not fully on self-detection result of safety switch is obtained, output stops referring to
It enables and issues early warning information.
Optionally, the safety switch includes relay, trigger switch and locking switch, the relay respectively with institute
Controller, trigger switch connection are stated, the trigger switch is connect with the self-checking circuit, the locking switch respectively, institute
Locking switch is stated to connect with the self-checking circuit, when the trigger switch and the locking switch are closed, the safety open
It closes fully on.
The beneficial effect of embodiment of the present invention is: being in contrast to the prior art, in embodiments of the present invention, opens
The method for closing self-test includes: to judge whether door of washing machine closes；When the door of washing machine is not turned off, control low pressure output；When
When the door of washing machine is closed, High voltage output is controlled；Export pulse self-test signal；Judge whether to receive the complete pulse
Self-test signal；When not receiving the complete pulse self-test signal, then the not fully on self-test knot of safety switch is obtained
Fruit exports halt instruction and issues early warning information.As a result, when door of washing machine is closed, lasting transmission pulse self-test letter
Number, and whether real-time judge receives the complete pulse self-test signal, believes when not receiving the complete pulse self-test
Number when, then from detection safety switch failure, meet the requirement of more stable, more acurrate self-test.
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 schematic diagram of embodiment of the present invention switch self-checking system；
Fig. 2 is the flow chart for the method that embodiment of the present invention one switchs self-test；
Fig. 3 is the flow chart for the method that embodiment of the present invention two switchs self-test；
Fig. 4 is the structural schematic diagram for the device that embodiment of the present invention three switchs self-test；
Fig. 5 is that embodiment of the present invention provides the hardware structural diagram of electronic equipment.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with drawings and the embodiments,
The present invention will be described in further detail.It should be appreciated that the specific embodiments described herein are only to explain the present invention,
It is not intended to limit the present invention.
Technical solution in order to better illustrate the present invention below does further the application environment of embodiment of the present invention
Illustrate, embodiment of the present invention includes providing a kind of switch self-checking system, referring to Fig. 1, Fig. 1 is embodiment of the present invention switch
The structural schematic diagram of self-checking system 100, switch self-checking system 100 are applied to washing machine, and washing machine includes tumbling-box washing machine, rolling
Drum washing machine can have drying mode, wherein switch self-checking system 100 include safety switch 10, controller 20, power supply 30 with
And self-checking circuit 40, safety switch 10 refer to door of washing machine safety switch, controller 20 include single-chip microcontroller (MCU,
Microcontroller Unit), power supply 30 includes the two kinds of output mode power supplies of high pressure and low pressure, and optionally, low pressure includes 9 volts
Low-voltage output, high pressure include 310 volts of high voltage outputs；Safety switch 10 is connect with self-checking circuit 40, controller 20 respectively with
Power supply 30, self-checking circuit 40 connect, and controller 20 is for judging whether door of washing machine closes, when door of washing machine is not turned off, then
Low pressure output is controlled, i.e. control power supply 30 exports 9 volts of low-voltages, when door of washing machine is closed, then controls High voltage output, i.e.,
It controls power supply 30 and exports 310 volts of high voltages, operated normally with the motor etc. for driving washing machine.Certainly, in embodiment of the present invention
In, without limitation, optionally, self-checking circuit 40 is provided with the end Meas_Door_Closed_ZK to the volt value of low-voltage and high voltage,
The port is connect with controller 20, and controller 20 judges whether door of washing machine closes by monitoring self-test signal fluctuation.Work as high pressure
When output, controller 20 is also used to export pulse self-test signal, and judges whether to receive complete pulse self-test signal, when not
When receiving complete pulse self-test signal, then exports halt instruction and issue early warning information.Optionally, safety switch 10
Including relay J, trigger switch K0 and locking switch K1, relay J is connect with controller 20, trigger switch K0 respectively, touching
Hair switch K0 connect respectively with controller 20, locking switch K1, locking switch K1 is connect with controller 20, when trigger switch K0 with
When locking switch K1 is closed, safety switch 10 is just fully on, wherein when controller 20, which controls power supply 30, exports high pressure,
Relay J is attracted conducting locking switch K1, and safety switch 10 is just fully at this time, if safety switch 10 is because failure can not be complete
Full conducting, then controller 20 can not receive complete pulse self-test signal, it is possible thereby to determine safety switch failure, meet more
The requirement of stable, more acurrate self-test.
Embodiment one
Further referring to Fig. 2, Fig. 2 is the flow chart for the method that embodiment of the present invention one switchs self-test, and this method is answered
For washing machine, comprising:
Step 101: judging whether door of washing machine closes；
Optionally, self-checking circuit is equipped with the port Meas_Door_Closed_ZK, and controller passes through Meas_Door_
The port Closed_ZK monitors self-test signal fluctuation, to judge whether door of washing machine closes.
Step 102: when the door of washing machine is not turned off, control low pressure output；
Power supply includes the two kinds of output mode power supplies of high pressure and low pressure, and optionally, low pressure includes 9 volts of low-voltage outputs, high pressure
It is exported including 310 volts of high voltages, when door of washing machine is not turned off, then controls low pressure output, i.e. control power supply 30 exports 9 volts
Low-voltage, certainly, in embodiments of the present invention, the volt value of low-voltage is without limitation.
Step 103: when the door of washing machine is closed, controlling High voltage output；
When door of washing machine is closed, then High voltage output is controlled, i.e. control power supply exports 310 volts of high voltages, to drive laundry
Motor of machine etc. operates normally.
Step 104: output pulse self-test signal；
Optionally, self-checking circuit is provided with the port Sig_Door_Lock_Enable and the port Meas_Door_Lock,
The port Sig_Door_Lock_Enable and the port Meas_Door_Lock are connect with controller, Sig_Door_Lock_
Safety switch is connected between the port Enable and the port Meas_Door_Lock, controller passes through Sig_Door_Lock_
The end Enable sends pulse self-test signal, then receives pulse self-test signal by the port Meas_Door_Lock.
Step 105: judging whether to receive the complete pulse self-test signal；
Controller receives pulse self-test signal by the port Meas_Door_Lock and judges whether to receive complete arteries and veins
Rush self-test signal.
Step 106: when not receiving the complete pulse self-test signal, then it is not fully on to obtain safety switch
Self-detection result exports halt instruction and issues early warning information.
When place any one in safety switch open circuit or poor contact, controller all will test less than complete pulse self-test
Signal thereby determines that safety switch breaks down, should export in time halt instruction at this time and issue early warning information.It is optional
, halt instruction stops operating for controlling motor；Early warning information includes controlling the instruction etc. of alarm equipment alarm.
In embodiments of the present invention, the method for switching self-test includes: to judge whether door of washing machine closes；When the laundry
When gate is not turned off, control low pressure output；When the door of washing machine is closed, High voltage output is controlled；Export pulse self-test signal；
Judge whether to receive the complete pulse self-test signal；When not receiving the complete pulse self-test signal, then
The self-detection result not fully on to safety switch exports halt instruction and issues early warning information.Work as door of washing machine as a result,
When closing, lasting transmission pulse self-test signal, and whether real-time judge receives the complete pulse self-test signal, when not
When receiving the complete pulse self-test signal, then from detection safety switch failure, meet wanting for more stable, more acurrate self-test
It asks.
Embodiment two
Referring to Fig. 3, Fig. 3 is the flow chart for the method that embodiment of the present invention two switchs self-test, this method is applied to wash
Clothing machine, comprising:
Step 201: judging whether door of washing machine closes；
Optionally, self-checking circuit is equipped with the port Meas_Door_Closed_ZK, is fluctuated by monitoring self-test signal, with
Judge whether door of washing machine closes.
Step 202: when the door of washing machine is not turned off, control low pressure output；
Power supply includes the two kinds of output mode power supplies of high pressure and low pressure, and optionally, low pressure includes 9 volts of low-voltage outputs, high pressure
It is exported including 310 volts of high voltages, when door of washing machine is not turned off, then controls low pressure output, i.e. 9 volts of control power supply output is low
Voltage, certainly, in embodiments of the present invention, the volt value of low-voltage is without limitation.
Step 203: judging whether to receive low voltage level detection signal；
Optionally, self-checking circuit be provided with the port Sig_Door_Lock_Time, the port Meas_Door_Closed_ZK and
The port Door_Lock_en, the port Sig_Door_Lock_Time, the port Meas_Door_Closed_ZK and Door_Lock_en
Port is connect with controller, the port Sig_Door_Lock_Time and the port Meas_Door_Closed_ZK respectively with Door_
Lock_en is connected with safety switch between port, wherein the port Meas_Door_Closed_ZK is the output of level self-test signal
End, the port Door_Lock_en are that level signal exports feedback end, and controller obtains low tension by the port Door_Lock_en
Flat detection signal.
Step 204: when receiving low voltage level detection signal, then issuing early warning information.
If just receiving low voltage level detection signal when door of washing machine is not turned off, illustrating the relay in safety switch
Device or switch are not opened because of aging or failure bullet, as a result, in embodiments of the present invention, by step 203 and step 204 come
The case where examining the relay in safety switch or switch not to open because of aging or failure bullet, and carry out warning note.Early warning
Prompt information includes control alarm equipment alarm, buzzer sounding etc..
Step 205: when door of washing machine is closed, controlling High voltage output；
When door of washing machine is closed, then High voltage output is controlled, i.e. control power supply exports 310 volts of high voltages, to drive laundry
Motor of machine etc. operates normally.
Step 206: judging whether to receive high voltage level detection signal；
After controller controls High voltage output, judge whether to receive high voltage level detection signal at once.
Step 207: when not receiving high voltage level detection signal, then exporting halt instruction and issue early warning letter
Breath.
After door of washing machine closing, if not receiving high voltage level detection signal, illustrate the relay in safety switch
Or it switchs because failure could not be fully switched on.
Step 208: output pulse self-test signal；
Optionally, controller is provided with the port Sig_Door_Lock_Enable and the port Meas_Door_Lock, Sig_
The port Door_Lock_Enable and the port Meas_Door_Lock are connect with self-checking circuit 40, Sig_Door_Lock_
Safety switch 10 is connected between the port Enable and the port Meas_Door_Lock, controller passes through Sig_Door_Lock_
The end Enable sends pulse self-test signal, then receives pulse self-test signal by the port Meas_Door_Lock.
Step 209: judging whether to receive complete pulse self-test signal；
Receive pulse self-test signal by the port Meas_Door_Lock and judges whether to receive complete pulse self-test
Signal.
Step 210: when not receiving complete pulse self-test signal, then obtaining the not fully on self-test of safety switch
As a result, exporting halt instruction and issuing early warning information.
When place any one in safety switch open circuit or poor contact, controller all will test less than complete pulse self-test
Signal thereby determines that safety switch breaks down, should export in time halt instruction at this time and issue early warning information.It is optional
, halt instruction stops operating for controlling motor；Early warning information includes controlling the instruction etc. of alarm equipment alarm.
In embodiments of the present invention, the method for switching self-test includes: to judge whether door of washing machine closes；When the laundry
When gate is not turned off, control low pressure output；When the door of washing machine is closed, High voltage output is controlled；Export pulse self-test signal；
Judge whether to receive the complete pulse self-test signal；When not receiving the complete pulse self-test signal, then
The self-detection result not fully on to safety switch exports halt instruction and issues early warning information.Work as door of washing machine as a result,
When closing, lasting transmission pulse self-test signal, and whether real-time judge receives the complete pulse self-test signal, when not
When receiving the complete pulse self-test signal, then from detection safety switch failure, meet wanting for more stable, more acurrate self-test
It asks.
Embodiment three
Referring to Fig. 4, Fig. 4 is the structural schematic diagram for the device that embodiment of the present invention three switchs self-test, which is answered
For washing machine, comprising: first judgment module 301, the first control module 302, the second control module 303, the first output module
304, the second judgment module 305, the second output module 306, third judgment module 307, third output module the 308, the 4th judge
Module 309 and the 4th output module 310.
First judgment module 301 is for judging whether door of washing machine closes；
First control module 302 is used for when the door of washing machine is not turned off, control low pressure output；
Second control module 303 is used to control High voltage output when the door of washing machine is closed；
First output module 304 is used to export pulse self-test signal when the door of washing machine is closed；
Second judgment module 305 receives the complete pulse self-test signal for judging whether；
Second output module 306 is used to then obtain safety switch when not receiving the complete pulse self-test signal
Not fully on self-detection result exports halt instruction and issues early warning information.
Third judgment module 307 receives low voltage level detection signal for judging whether；
Third output module 308 is used to then issue early warning information when receiving the low voltage level detection signal.
4th judgment module 309 receives high voltage level detection signal for judging whether；
4th output module 310 is used to then export halt instruction simultaneously when not receiving the high voltage level detection signal
Issue early warning information.
Optionally, the halt instruction stops operating for controlling motor.
It should be noted that being based on identical hair in apparatus of the present invention embodiment three and the method for the present invention embodiment two
Bright design, therefore, the particular content and beneficial effect of apparatus of the present invention embodiment three please refer to the method for the present invention embodiment
Two, it will not repeat them here.
Referring to FIG. 5, Fig. 5 is the hardware structural diagram of embodiment of the present invention offer electronic equipment, as shown in figure 5,
The electronic equipment 50 includes:
At least one processor 51, and the memory 52 being connect at least one processor communication, wherein the storage
Device is stored with the instruction that can be executed by least one described processor, and described instruction is executed by least one described processor, with
At least one described processor is set to be able to carry out the method in above method embodiment, in Fig. 5 by taking a processor 51 as an example.
Processor 51 can be connected with memory 52 by bus or other modes, to be connected as by bus in Fig. 5
Example.
Memory 52 is used as a kind of non-transient computer readable storage medium, can be used for storing non-transient software program, non-
Transient computer executable program and module, as in the embodiment of the present invention switch self-test the corresponding program instruction of method/
Module (for example, attached first judgment module 301, the first control module 302, the second control module 303, the first output module 304,
Second judgment module 305, the second output module 306, third judgment module 307, third output module 308, the 4th judgment module
309 and the 4th output module 310).Processor 51 by operation be stored in memory 52 non-transient software program, instruction with
And module, thereby executing the various function application and data processing of electronic equipment, i.e., in realization above method embodiment
Method.
Memory 52 may include storing program area and storage data area, wherein storing program area can storage program area,
Application program required at least one function；Storage data area can be stored to be created according to the using for device of switch self-test
Data etc..In addition, memory 52 may include high-speed random access memory, it can also include non-transient memory, such as extremely
A few disk memory, flush memory device or other non-transient solid-state memories.In some embodiments, memory 52
Optional includes the memory remotely located relative to processor 51, these remote memories can be by network connection to switch certainly
The device of inspection.The example of above-mentioned network includes but is not limited to internet, intranet, local area network, mobile radio communication and its group
It closes.
One or more of modules are stored in the memory 52, when by one or more of processors 51
When execution, the method for executing the switch self-test in above-mentioned any means embodiment, for example, executing the side in Fig. 2 described above
For method step 101 to step 106, the method and step 201 in Fig. 3 realizes the function of the module 301 to 310 in Fig. 4 to step 210.
The said goods can be performed embodiment of the present invention provided by method, have the corresponding functional module of execution method and
Beneficial effect.The not technical detail of detailed description in the present embodiment, reference can be made to method provided by embodiment of the present invention.
The electronic equipment of the embodiment of the present invention exists in a variety of forms, including but not limited to: electronic equipment: providing and calculates clothes
The equipment of business, the composition of electronic equipment include processor, hard disk, memory, system bus etc., electronic equipment and general computer
Framework is similar, but due to needing to provide highly reliable service, processing capacity, stability, reliability, safety, can
Scalability, manageability etc. are more demanding.Alternatively, other electronic devices with data interaction function.
Embodiment of the present invention provides a kind of non-transient computer readable storage medium, and the non-transient computer is readable
Storage medium is stored with computer executable instructions, which executes above-mentioned any means reality by electronic equipment
The method for applying the switch self-test in mode, for example, executing method and step 101 in Fig. 2 described above to step 106, in Fig. 3
Method and step 201 to step 210, realize the function of the module 301 to 310 in Fig. 4.
The embodiment of the invention provides a kind of computer program products, including are stored in non-transient computer readable storage medium
Calculation procedure in matter, the computer program include program instruction, are computer-executed constantly when described program instructs, make institute
The method that computer executes the switch self-test of above-mentioned any means embodiment is stated, for example, executing the side in Fig. 2 described above
For method step 101 to step 106, the method and step 201 in Fig. 3 realizes the function of the module 301 to 310 in Fig. 4 to step 210.
Through the above description of the embodiments, those of ordinary skill in the art can be understood that each embodiment
The mode of general hardware platform can be added to realize by software, naturally it is also possible to pass through hardware.Those of ordinary skill in the art can
With understand all or part of the process realized in above-described embodiment method be can be instructed by computer program it is relevant hard
Part is completed, and the program can be stored in a computer-readable storage medium, the program is when being executed, it may include as above
State the process of the embodiment of each method.Wherein, the storage medium can be magnetic disk, CD, read-only memory (Read-
Only Memory, ROM) or random access memory (Random Access Memory, RAM) etc..
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；At this
It under the thinking of invention, can also be combined between the technical characteristic in above embodiments or different embodiment, step can be with
It is realized with random order, and there are many other variations of different aspect present invention as described above, for simplicity, they do not have
Have and is provided in details；Although the present invention is described in detail referring to the foregoing embodiments, the ordinary skill people of this field
Member is it is understood that it is still possible to modify the technical solutions described in the foregoing embodiments, or to part of skill
Art feature is equivalently replaced；And these are modified or replaceed, each reality of the present invention that it does not separate the essence of the corresponding technical solution
Apply the range of a technical solution.
Mode the above is only the implementation of the present invention is not intended to limit the scope of the invention, all to utilize this
Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content, it is relevant to be applied directly or indirectly in other
Technical field is included within the scope of the present invention.
Claims (10)
1. a kind of method for switching self-test, is applied to washing machine characterized by comprising
Judge whether door of washing machine closes；
When the door of washing machine is closed, High voltage output is controlled；
Export pulse self-test signal；
Judge whether to receive the complete pulse self-test signal；
When not receiving the complete pulse self-test signal, then the not fully on self-detection result of safety switch is obtained, it is defeated
Halt instruction and issue early warning information out；
When the door of washing machine is not turned off, control low pressure output.
2. the method according to claim 1, wherein
Described when the door of washing machine is not turned off, after controlling the step of low pressure exports, the method also includes:
Judge whether to receive low voltage level detection signal；
When receiving the low voltage level detection signal, then early warning information is issued.
3. the method according to claim 1, wherein
It is described when the door of washing machine close when, control High voltage output the step of after, the method also includes:
Judge whether to receive high voltage level detection signal；
When not receiving the high voltage level detection signal, then exports halt instruction and issue early warning information.
4. the method according to claim 1, wherein
The halt instruction stops operating for controlling motor.
5. a kind of device for switching self-test, is applied to washing machine characterized by comprising
First judgment module, is used to judge whether door of washing machine to close；
First control module is used for when the door of washing machine is not turned off, control low pressure output；
Second control module is used to control High voltage output when the door of washing machine is closed；
First output module is used to export pulse self-test signal when the door of washing machine is closed；
Second judgment module is used to judge whether to receive the complete pulse self-test signal；
Second output module is used to that it is not complete then to obtain safety switch when not receiving the complete pulse self-test signal
The self-detection result be connected entirely exports halt instruction and issues early warning information.
6. device according to claim 5, which is characterized in that described device further include:
Third judgment module is used to judge whether to receive low voltage level detection signal；
Third output module is used to then issue early warning information when receiving the low voltage level detection signal.
7. device according to claim 5, which is characterized in that described device further include:
4th judgment module is used to judge whether to receive high voltage level detection signal；
4th output module is used to then export halt instruction when not receiving the high voltage level detection signal and issue
Early warning information.
8. device according to claim 5, which is characterized in that
The halt instruction stops operating for controlling motor.
9. a kind of switch self-checking system characterized by comprising
Safety switch；
Self-checking circuit is connect with the safety switch；
Controller is connect with the self-checking circuit, and the controller is for judging whether door of washing machine closes, when the laundry
When gate is not turned off, control low pressure output controls High voltage output when the door of washing machine is closed, described when High voltage output
Controller is also used to export pulse self-test signal, and judges whether to receive the complete pulse self-test signal, when not receiving
When to the complete pulse self-test signal, then the not fully on self-detection result of safety switch is obtained, output halt instruction is simultaneously
Issue early warning information.
10. system according to claim 9, which is characterized in that
The safety switch includes relay, trigger switch and locking switch, the relay respectively with the controller, institute
State trigger switch connection, the trigger switch connect with the self-checking circuit, the locking switch respectively, the locking switch and
Self-checking circuit connection, when the trigger switch and the locking switch are closed, the safety switch is fully on.
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| CN203904725U (en) * | 2014-06-25 | 2014-10-29 | 宁波梵科电子科技有限公司 | Door opening protecting circuit of washing machine |
| CN104278482A (en) * | 2014-09-15 | 2015-01-14 | 合肥荣事达三洋电器股份有限公司 | Door-opening power-on circuit and washing machine adopting same |
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| CN2294983Y (en) * | 1997-05-22 | 1998-10-21 | 海尔集团公司 | Lid switch for washing machine |
| CN101994241A (en) * | 2009-08-11 | 2011-03-30 | 海尔集团公司 | Safety protection circuit and method of door cover of washing machine |
| CN102041661A (en) * | 2009-10-13 | 2011-05-04 | 三星电子株式会社 | Apparatus for controlling of door lock in washing machine and method thereof |
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| CN109828200B (en) | 2021-04-20 |
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