CN106930056A - Washing machine and its detergent detection means - Google Patents
Washing machine and its detergent detection means Download PDFInfo
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- CN106930056A CN106930056A CN201710174675.1A CN201710174675A CN106930056A CN 106930056 A CN106930056 A CN 106930056A CN 201710174675 A CN201710174675 A CN 201710174675A CN 106930056 A CN106930056 A CN 106930056A
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- switching tube
- resistance
- optocoupler
- switch pipe
- washing machine
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/14—Arrangements for detecting or measuring specific parameters
- D06F34/22—Condition of the washing liquid, e.g. turbidity
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Abstract
The invention discloses a kind of washing machine and its detergent detection means, wherein, described device, including：Detecting electrode, detecting electrode is arranged in the detergent embarking device of washing machine；Alternating voltage produces circuit, alternating voltage to produce circuit to be connected with detecting electrode, and alternating voltage produces circuit for producing alternating voltage, and alternating voltage is applied to detecting electrode；Detection circuit, whether detection circuit between two test sides for detecting detecting electrode by being powered to generate detection signal；Controller, controller is connected with detection circuit, and controller is used to be obtained according to detection signal the liquid level of detergent in detergent embarking device.The apparatus according to the invention, can be effectively prevented from forming oxide-film on detecting electrode, it is to avoid detection failure, and then can correctly judge the liquid level of detergent, and user's addition detergent is reminded in time, improve the reliability of washing machine.
Description
Technical field
The present invention relates to wash technical field of electric appliances, more particularly to a kind of washing machine detergent detection means and one kind are done washing
Machine.
Background technology
At present, the washing machine of function is delivered automatically on band, its detergent embarking device is arranged at the interior of washing machine
Portion so that user cannot be directly viewed the liquid level of detergent, it is therefore desirable to which the liquid level to detergent is detected.Conventional detection
Scheme is one DC voltage of connection on probe, i.e., set probe by certain position of detergent embarking device, is led to
Whether the detecting electrode for crossing detection probe judges the liquid level of detergent in detergent with conductive characteristic.However, working as probe
Detecting electrode in detergent for a long time plus during DC voltage, the detecting electrode of probe also can for a long time be in electroplating conditions,
Causing the surface of the detecting electrode of probe can form layer oxide film.It is non-conductive due to oxide-film, probe will be caused to fail,
Whole detection circuit also just cannot normal work, and then washing machine cannot correctly judge the liquid level of detergent.
The content of the invention
It is contemplated that at least solving one of technical problem in above-mentioned technology to a certain extent.
Therefore, it is an object of the present invention to propose a kind of washing machine detergent detection means, the device can be effective
Avoid forming oxide-film on detecting electrode, it is to avoid detection failure, and then can correctly judge the liquid level of detergent, in time
User's addition detergent is reminded, the reliability of washing machine is improve.
Second object of the present invention is to propose a kind of washing machine.
To reach above-mentioned purpose, first aspect present invention embodiment proposes a kind of washing machine detergent detection means, bag
Include：Detecting electrode, the detecting electrode is arranged in the detergent embarking device of the washing machine；Alternating voltage produces electricity
Road, the alternating voltage produces circuit to be connected with the detecting electrode, and the alternating voltage produces circuit for producing alternation electricity
Pressure, and the alternating voltage is applied to the detecting electrode；Detection circuit, the detection circuit is by detecting the detection electricity
Whether it is powered to generating detection signal between two test sides of pole；Controller, the controller is connected with the detection circuit,
The controller is used to be obtained according to the detection signal liquid level of detergent in the detergent embarking device.
Washing machine detergent detection means according to embodiments of the present invention, produces circuit to produce alternation electricity by alternating voltage
Pressure, and produced alternating voltage is applied to detecting electrode, then, by two detections for detecting electric circuit inspection detecting electrode
Whether it is powered between end to generate detection signal, finally, detergent is obtained according to detection signal by controller and delivers dress automatically
The liquid level of the detergent in putting.The device, alternating voltage is applied by detecting electrode two ends, can be effectively prevented from detection
Oxide-film is formed on electrode, it is to avoid detection failure, and then can correctly judge the liquid level of detergent, user's addition is reminded in time
Detergent, improves the reliability of washing machine.
In addition, can also be had according to the washing machine detergent detection means that the above embodiment of the present invention is proposed following additional
Technical characteristic：
According to one embodiment of present invention, the alternating voltage produce circuit include first switch pipe, second switch pipe,
3rd switching tube and the 4th switching tube, wherein, the emitter stage phase of the colelctor electrode of the first switch pipe and the second switch pipe
Even, and between the emitter stage of the colelctor electrode of the first switch pipe and the second switch pipe there is first node；Described 3rd
The colelctor electrode of switching tube is connected with the emitter stage of the 4th switching tube, and the 3rd switching tube colelctor electrode and the described 4th
There is Section Point between the emitter stage of switching tube；The emitter stage of the emitter stage of the first switch pipe and the 3rd switching tube
It is connected, and there is the 3rd node, described the between the emitter stage of the emitter stage of the first switch pipe and the 3rd switching tube
Three nodes are connected with the first default power supply；The colelctor electrode of the second switch pipe is connected with the colelctor electrode of the 4th switching tube,
And there is fourth node, the fourth node between the colelctor electrode of the colelctor electrode of the second switch pipe and the 4th switching tube
It is grounded by first resistor；The first node is connected with the first energization end of the detecting electrode, the Section Point and institute
The the second energization end for stating detecting electrode is connected, and the controller is additionally operable to be opened to the described 4th by controlling the first switch pipe
The switching sequence of pipe is closed so that the first node and the Section Point export the alternating voltage.
Further, the alternating voltage generation circuit also includes：First optocoupler, the first input end of first optocoupler
The second default power supply is connected to, the second input of first optocoupler is connected to the first trigger signal output of the controller
End, the first output end of first optocoupler is connected and by the 3rd by second resistance with the base stage of the first switch pipe
Resistance is connected with the base stage of the 4th switching tube, the second output head grounding of first optocoupler；Second optocoupler, described second
The first input end of optocoupler is connected to the described second default power supply, and the second input of second optocoupler is connected to the control
Second trigger signal output end of device, the first output end of second optocoupler passes through the 4th resistance and the second switch pipe
Base stage is connected and is connected with the base stage of the 3rd switching tube by the 5th resistance, the second output termination of second optocoupler
Ground；Wherein, the controller is alternately exported by the first trigger signal output end and the second trigger signal output end
Trigger signal, to control the first switch pipe and the 4th switching tube conducting, the second switch pipe and the described 3rd to open
Close pipe conducting alternately.
According to one embodiment of present invention, the alternating voltage produces the circuit also to include the 6th resistance, the 7th resistance, the
Eight resistance and the 9th resistance, the 6th resistance are connected between the base stage of the first switch pipe and emitter stage, and the described 7th
Resistance is connected between the base stage of the second switch pipe and emitter stage, and the 8th resistance is connected to the 3rd switching tube
Between base stage and emitter stage, the 9th resistance is connected between the base stage of the 4th switching tube and emitter stage.
According to one embodiment of present invention, the test side of the detection circuit is connected with the fourth node, the inspection
Slowdown monitoring circuit is used to detect the voltage of the fourth node to export the detection signal.
According to one embodiment of present invention, the detection circuit includes：First electric capacity, one end of first electric capacity with
The fourth node is connected, the other end ground connection of first electric capacity；First diode, the negative electrode of first diode and institute
State fourth node to be connected, the anode of first diode is grounded after being connected with the other end of first electric capacity；Two or two pole
Pipe, the anode of second diode is connected with the fourth node, and the negative electrode of second diode is connected to described first
Default power supply；5th switching tube and the 6th switching tube, the base stage of the 5th switching tube pass through the tenth resistance with described Section four
Point is connected, the grounded emitter of the 5th switching tube, the colelctor electrode of the 5th switching tube by the 11st resistance with it is described
The base stage of the 6th switching tube is connected, and the emitter stage of the 6th switching tube is connected to the described first default power supply, and the described 6th opens
The colelctor electrode of pipe is closed as the output end of the detection circuit.
According to one embodiment of present invention, the detection circuit also includes the 12nd resistance and the 13rd resistance, described
12nd resistance is connected between the base stage of the 5th switching tube and emitter stage, and the 13rd resistance is connected to the described 6th
Between the base stage and emitter stage of switching tube.
According to one embodiment of present invention, the detection circuit also includes：3rd optocoupler, the first of the 3rd optocoupler
Input is connected by the 14th resistance with the colelctor electrode of the 6th switching tube, the second input termination of the 3rd optocoupler
Ground, the first output end of the 3rd optocoupler is preset power supply and is connected by the 15th resistance with second, and the of the 3rd optocoupler
Two output head groundings；16th resistance, one end of the 16th resistance is connected with the first output end of the 3rd optocoupler, institute
The other end for stating the 16th resistance is connected with the controller.
To reach above-mentioned purpose, second aspect present invention embodiment proposes a kind of washing machine, including above-mentioned washing machine
Detergent detection means.
Washing machine according to embodiments of the present invention, using above-mentioned washing machine detergent detection means, by detection electricity
Pole two ends apply alternating voltage, can be effectively prevented from forming oxide-film on detecting electrode, it is to avoid detection failure, and then can
The correct liquid level for judging detergent, reminds user's addition detergent in time, improves the reliability of washing machine.
Brief description of the drawings
Fig. 1 is the circuit diagram of washing machine detergent detection means according to embodiments of the present invention；
Fig. 2 is the position relationship between detecting electrode according to an embodiment of the invention and detergent embarking device
Schematic diagram；And
Fig. 3 is the block diagram of the washing machine according to the present embodiment.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from start to finish
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
It is exemplary to scheme the embodiment of description, it is intended to for explaining the present invention, and be not considered as limiting the invention.
The washing machine and its detergent detection means of the embodiment of the present invention described below in conjunction with the accompanying drawings.
Fig. 1 is the circuit diagram of washing machine detergent detection means according to embodiments of the present invention.
As shown in figure 1, the washing machine detergent detection means of the embodiment of the present invention, it may include detecting electrode 10, alternation electricity
Pressure produces circuit 100, detection circuit 200 and controller (not specifically illustrated in figure).
Wherein, as shown in Fig. 2 detecting electrode 10 is arranged in the detergent embarking device 20 of washing machine.Alternation electricity
Pressure produces circuit 100 to be connected with detecting electrode 10, and alternating voltage produces circuit 100 for producing alternating voltage and alternation is electric
Pressure applies to detecting electrode 10.Whether detection circuit 200 between two test sides for detecting detecting electrode 10 by being powered with life
Into detection signal.Controller is connected with detection circuit 200, and controller is used to deliver dress automatically according to detection signal acquisition detergent
Put the liquid level of detergent in 20.
Specifically, produce circuit 100 to apply alternating voltage on the detecting electrode 10 of probe by alternating voltage, may be such that
The positive-negative polarity of the electrolysis electrode at the two ends of detecting electrode 10 is constantly occurring change, and electric current can be avoided only to be flowed through from a direction
Detecting electrode 10, and then the detecting electrode 10 of probe can be avoided to generate oxide-film, it is to avoid detection failure, extend the longevity of probe
Life.Detect whether two test sides of the detecting electrode 10 of probe are powered by detecting circuit 200, and generate detection signal such as height
Level detection signal or low power testing ordinary mail number.Further, controller can obtain detergent and deliver dress automatically according to detection signal
Put the liquid level of detergent in 20, and can when detergent liquid level is not enough, alarm is sent by controller with remind user in time to
Putting detergent in detergent embarking device 20, improves the reliability of washing machine.
In one embodiment of the invention, alternating voltage generation circuit 100 may include first switch pipe Q1, second switch
Pipe Q2, the 3rd switching tube Q3 and the 4th switching tube Q4.Wherein, the transmitting of the colelctor electrode of first switch pipe Q1 and second switch pipe Q2
Extremely it is connected, and there is first node J1 between the colelctor electrode of first switch pipe Q1 and the emitter stage of second switch pipe Q2.3rd opens
The colelctor electrode for closing pipe Q3 is connected with the emitter stage of the 4th switching tube Q4, and the 3rd switching tube Q3 colelctor electrode and the 4th switching tube Q4
Emitter stage between have Section Point J2.The emitter stage of first switch pipe Q1 is connected with the emitter stage of the 3rd switching tube Q3, and
There is the 3rd node J3, the 3rd node J3 and first between the emitter stage of first switch pipe Q1 and the emitter stage of the 3rd switching tube Q3
Default power supply VCC1 (such as+12V DC voltages) is connected.The colelctor electrode of second switch pipe Q2 and the colelctor electrode phase of the 4th switching tube Q4
Even, and between the colelctor electrode of second switch pipe Q2 and the colelctor electrode of the 4th switching tube Q4 there is fourth node J4, fourth node J4
GND is grounded by first resistor R1.First node J1 is connected with the first energization end of detecting electrode 10, Section Point J2 with detection
Second energization end of electrode 10 is connected, when controller is additionally operable to the switch by controlling the switching tube Q4 of first switch pipe Q1 to the 4th
Sequence is so that first node J1 and Section Point J2 output alternating voltages.
In one embodiment of the invention, alternating voltage produces circuit 100 to may also include the first optocoupler OC1 and the second light
Coupling OC2.The first input end of the first optocoupler OC1 is connected to the second default power supply VCC2 (such as+5V DC voltages), the first optocoupler
Second input of OC1 is connected by the 17th resistance R17 with the first trigger signal output end MCU_1 of controller, the first light
First output end of coupling OC1 is connected and by 3rd resistor R3 and by second resistance R2 with the base stage of first switch pipe Q1
The base stage of four switching tube Q4 is connected, the second output head grounding GND of the first optocoupler OC1.The first input end of the second optocoupler OC2 connects
The second input for being connected to the second default power supply VCC2, the second optocoupler OC2 is touched by the 18th resistance R18 with the second of controller
Signalling output end MCU_2 is connected, and first output end of the second optocoupler OC2 passes through the base of the 4th resistance R4 and second switch pipe Q2
Extremely it is connected and is connected with the base stage of the 3rd switching tube Q3 by the 5th resistance R5, second output head grounding of the second optocoupler OC2
GND.Wherein, controller is alternately exported by the first trigger signal output end MCU_1 and the second trigger signal output end MCU_2 and touched
Signal, to control first switch pipe Q1 and the 4th switching tube Q4 conductings, second switch pipe Q2 and the 3rd switching tube Q3 conductings to hand over
For carry out.
In one embodiment of the invention, alternating voltage produces circuit 100 to may also include the 6th resistance R6, the 7th resistance
R7, the 8th resistance R8 and the 9th resistance R9, the 6th resistance R6 are connected between the base stage of first switch pipe Q1 and emitter stage, and the 7th
Resistance R7 is connected between the base stage of second switch pipe Q2 and emitter stage, and the 8th resistance R8 is connected to the base stage of the 3rd switching tube Q3
Between emitter stage, the 9th resistance R9 is connected between the base stage of the 4th switching tube Q4 and emitter stage, to improve first switch pipe
The reliability that the switching tube Q4 of Q1 to the 4th are turned off.
Specifically, the exportable sequential low level control signal of controller.When the first trigger signal output end of controller
During MCU_1 output low level control signals, may be such that the first optocoupler OC1 is turned on, first switch pipe Q1 and the 4th switching tube Q4 are equal
Conducting, if detecting electrode 10 is in detergent, probe is in conduction state, has electric current I2 to flow through between detecting electrode 10.
And when the second trigger signal output end MCU_2 of controller exports low level control signal, may be such that the second optocoupler OC2 leads
Logical, second switch pipe Q2 and the 3rd switching tube Q3 are both turned on, if detecting electrode 10 is in detergent, probe is on shape
State, has electric current I1 to flow through between detecting electrode 10.
That is, can be by the first trigger signal output end MCU_1 of controller, the second trigger signal output end MCU_
2 are alternately exported low level control signal so that first switch pipe Q1 and the 4th switching tube Q4, second switch pipe Q2 and
Three switching tube Q3 are alternately turned on, and then the positive-negative polarity of the electrolysis electrode at the two ends of detecting electrode 10 of probe can be made continuous
Change, thus, electric current can be effectively prevented from and only flow through detecting electrode 10 from a direction, and then probe can be avoided
Detecting electrode 10 generates oxide-film, it is to avoid detection failure, extends the life-span of probe.
In one embodiment of the invention, the test side A of detection circuit 200 is connected with fourth node J4, detects circuit
200 are used to detect the voltage of fourth node J4 to export detection signal.
Specifically, turned in first switch pipe Q1 and the 4th switching tube Q4, or second switch pipe Q2 and the 3rd switching tube Q3
Conducting, and constitute loop with detecting electrode 10, i.e., when detecting electrode 10 has electric current to flow through, can be by detecting that circuit 200 detects the
The voltage of four node J4 is the voltage of test side A, and exports detection signal such as high level detection signal.And in first switch pipe Q1
With the 4th switching tube Q4, or second switch pipe Q2 and the 3rd switching tube Q3, it is impossible to when constituting loop with detecting electrode 10, can pass through
The voltage of the detection detection fourth node of circuit 200 J4 simultaneously exports detection signal such as low level detection signal.
In one embodiment of the invention, detection circuit 200 may include the first electric capacity C1, the first diode D1, second
Diode D2, the 5th switching tube Q5 and the 6th switching tube Q6.Wherein, one end of the first electric capacity C1 is connected with fourth node J4, the
The other end ground connection GND of one electric capacity C1.The negative electrode of the first diode D1 is connected with fourth node J4, the anode of the first diode D1
GND is grounded after being connected with the other end of the first electric capacity C1.The anode of the second diode D2 is connected with fourth node J4, the two or two pole
The negative electrode of pipe D2 is connected to the first default power supply VCC1.The base stage of the 5th switching tube Q5 passes through the tenth resistance R10 and fourth node
J4 is connected, and the colelctor electrode of the grounded emitter GND of the 5th switching tube Q5, the 5th switching tube Q5 is by the 11st resistance R11 and the
The base stage of six switching tube Q6 is connected, and the emitter stage of the 6th switching tube Q6 is connected to the first default power supply VCC1, the 6th switching tube Q6
Colelctor electrode as detection circuit 200 output end.
In one embodiment of the invention, detection circuit 200 may also include the 12nd resistance R12 and the 13rd resistance
R13, the 12nd resistance R12 is connected between the base stage of the 5th switching tube Q5 and emitter stage, and the 13rd resistance R13 is connected to the 6th
Between the base stage and emitter stage of switching tube Q6.
In one embodiment of the invention, detection circuit 200 may also include the 3rd optocoupler OC3 and the 16th resistance R16.
Wherein, the first input end of the 3rd optocoupler OC3 is connected by the 14th resistance R14 with the colelctor electrode of the 6th switching tube Q6, and the 3rd
First output end of second the input end grounding GND, the 3rd optocoupler OC3 of optocoupler OC3 is default by the 15th resistance R15 and second
Power supply VCC2 is connected, the second output head grounding GND of the 3rd optocoupler OC3.One end of 16th resistance R16 and the 3rd optocoupler OC3
The first output end be connected, the other end of the 16th resistance R16 is connected with controller.
Specifically, the liquid level of detergent can be obtained according to detection signal by controller.If the detection letter of test side A
Number it is high level detection signal, then the 5th switching tube Q5, the 6th switching tube Q6, the 3rd optocoupler OC3 successive conductives, by detecting electricity
The detergent liquid level output end DETERGENT on road 200 detects low level signal, and low level signal is sent into controller,
The low level signal that controller can be exported according to detergent liquid level output end DETERGENT judges that the liquid level of detergent is optionally greater than and sets
The detecting electrode 10 of fixed threshold value, i.e. probe is in cleaning solution, it is not necessary to add detergent.If the detection signal of detection section A
It is low level signal, then the 5th switching tube Q5, the 6th switching tube Q6, the 3rd optocoupler OC3 are not turned on, by detecting circuit 200
Detergent liquid level output end DETERGENT detect high level signal, and high level signal is sent to controller, controller
The high level signal that can be exported according to detergent liquid level output end DETERGENT judges the threshold value of the liquid level less than setting of detergent,
That is the detecting electrode 10 of probe can send alarm to remind user automatic to detergent in time not in cleaning solution, by controller
Putting detergent in delivery device 20, improves the reliability of washing machine.
It should be noted that the parameter of each component in Fig. 1 of the embodiment of the present invention can be entered according to actual needs
Row setting, for example, the resistance R9 of second resistance R2 to the 9th, the resistance R12 of the 11st resistance R11 the 12nd and the 15th resistance R15
Resistance can be 4.7K ohm, the resistance of the tenth resistance R10 and the 14th resistance R14 can be 1K ohm, the 13rd resistance
The resistance of R13 and the 16th resistance R16 can be 2.2K ohm, and the capacity of the first electric capacity C1 can be 0.1uF.
In sum, washing machine detergent detection means according to embodiments of the present invention, circuit is produced by alternating voltage
Alternating voltage is produced, and produced alternating voltage is applied to detecting electrode, then, by detecting electric circuit inspection detecting electrode
Two test sides between whether be powered to generate detection signal, finally, by controller according to detection signal obtain detergent
The liquid level of the detergent in automatic release device.The device, alternating voltage is applied by detecting electrode two ends, can be effectively
Avoid forming oxide-film on detecting electrode, it is to avoid detection failure, and then can correctly judge the liquid level of detergent, carry in time
The user that wakes up adds detergent, improves the reliability of washing machine.
Based on above-described embodiment, the invention allows for a kind of washing machine 1000.
Fig. 3 is the block diagram of washing machine according to embodiments of the present invention.As shown in figure 3, the embodiment of the present invention is washed
Clothing machine 10000 includes above-mentioned washing machine detergent detection means 1000.
It should be noted that the details not disclosed in the washing machine 10000 of the embodiment of the present invention, refer to implementation of the present invention
Details disclosed in the washing machine detergent detection means 1000 of example, specific I will not elaborate.
Washing machine according to embodiments of the present invention, using above-mentioned washing machine detergent detection means, by detection electricity
Pole two ends apply alternating voltage, can be effectively prevented from forming oxide-film on detecting electrode, it is to avoid detection failure, and then can
The correct liquid level for judging detergent, reminds user's addition detergent in time, improves the reliability of washing machine.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outward ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on orientation shown in the drawings or
Position relationship, is for only for ease of the description present invention and simplifies description, must rather than the device or element for indicating or imply meaning
With specific orientation, with specific azimuth configuration and operation, therefore must be not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include one or more this feature.In the description of the invention, " multiple " is meant that two or more,
Unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integrally；Can be that machinery connects
Connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be in two elements
The connection in portion or two interaction relationships of element.For the ordinary skill in the art, can be according to specific feelings
Condition understands above-mentioned term concrete meaning in the present invention.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be with
It is the first and second feature directly contacts, or the first and second features are by intermediary mediate contact.And, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or spy that the embodiment or example are described
Point is contained at least one embodiment of the invention or example.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be with office
Combined in an appropriate manner in one or more embodiments or example.Additionally, in the case of not conflicting, the skill of this area
Art personnel can be tied the feature of the different embodiments or example described in this specification and different embodiments or example
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (9)
1. a kind of washing machine detergent detection means, it is characterised in that including：
Detecting electrode, the detecting electrode is arranged in the detergent embarking device of the washing machine；
Alternating voltage produces circuit, the alternating voltage to produce circuit to be connected with the detecting electrode, and the alternating voltage is produced
Circuit is used to produce alternating voltage, and the alternating voltage is applied to the detecting electrode；
Detection circuit, whether the detection circuit between two test sides for detecting the detecting electrode by being powered to generate inspection
Survey signal；
Controller, the controller is connected with the detection circuit, and the controller is used to obtain institute according to the detection signal
State the liquid level of detergent in detergent embarking device.
2. washing machine detergent detection means according to claim 1, it is characterised in that the alternating voltage produces circuit
Including first switch pipe, second switch pipe, the 3rd switching tube and the 4th switching tube, wherein,
The colelctor electrode of the first switch pipe is connected with the emitter stage of the second switch pipe, and the first switch pipe current collection
There is first node between the emitter stage of pole and the second switch pipe；
The colelctor electrode of the 3rd switching tube is connected with the emitter stage of the 4th switching tube, and the 3rd switching tube current collection
There is Section Point between the emitter stage of pole and the 4th switching tube；
The emitter stage of the first switch pipe is connected with the emitter stage of the 3rd switching tube, and the first switch pipe transmitting
There is the 3rd node, the 3rd node is connected with the first default power supply between the emitter stage of pole and the 3rd switching tube；
The colelctor electrode of the second switch pipe is connected with the colelctor electrode of the 4th switching tube, and the second switch pipe current collection
There is fourth node, the fourth node is grounded by first resistor between the colelctor electrode of pole and the 4th switching tube；
The first node is connected with the first energization end of the detecting electrode, the Section Point and the of the detecting electrode
Two energization ends are connected, and the controller is additionally operable to by controlling the first switch pipe to the switching sequence of the 4th switching tube
So that the first node and the Section Point export the alternating voltage.
3. washing machine detergent detection means according to claim 2, it is characterised in that the alternating voltage produces circuit
Also include：
First optocoupler, the first input end of first optocoupler is connected to the second default power supply, and the second of first optocoupler is defeated
Enter the first trigger signal output end that end is connected to the controller, the first output end of first optocoupler passes through second resistance
It is connected with the base stage of the first switch pipe and is connected with the base stage of the 4th switching tube by 3rd resistor, described first
Second output head grounding of optocoupler；
Second optocoupler, the first input end of second optocoupler is connected to the described second default power supply, and the of second optocoupler
Two inputs are connected to the second trigger signal output end of the controller, and the first output end of second optocoupler passes through the 4th
Resistance is connected with the base stage of the second switch pipe and is connected with the base stage of the 3rd switching tube by the 5th resistance, described
Second output head grounding of the second optocoupler；
Wherein, the controller is alternately exported by the first trigger signal output end and the second trigger signal output end
Trigger signal, to control the first switch pipe and the 4th switching tube conducting, the second switch pipe and the described 3rd to open
Close pipe conducting alternately.
4. the washing machine detergent detection means according to Claims 2 or 3, it is characterised in that the alternating voltage is produced
Circuit also includes the 6th resistance, the 7th resistance, the 8th resistance and the 9th resistance, and the 6th resistance is connected to the first switch
Between the base stage and emitter stage of pipe, the 7th resistance is connected between the base stage of the second switch pipe and emitter stage, described
8th resistance is connected between the base stage of the 3rd switching tube and emitter stage, and the 9th resistance is connected to the 4th switch
Between the base stage and emitter stage of pipe.
5. washing machine detergent detection means according to claim 2, it is characterised in that the test side of the detection circuit
It is connected with the fourth node, the detection circuit is used to detect the voltage of the fourth node to export the detection signal.
6. washing machine detergent detection means according to claim 5, it is characterised in that the detection circuit includes：
First electric capacity, one end of first electric capacity is connected with the fourth node, the other end ground connection of first electric capacity；
First diode, the negative electrode of first diode is connected with the fourth node, the anode of first diode with
The other end of first electric capacity is grounded after being connected；
Second diode, the anode of second diode is connected with the fourth node, and the negative electrode of second diode connects
It is connected to the described first default power supply；
5th switching tube and the 6th switching tube, the base stage of the 5th switching tube pass through the tenth resistance and the fourth node phase
Even, the grounded emitter of the 5th switching tube, the colelctor electrode of the 5th switching tube passes through the 11st resistance and the described 6th
The base stage of switching tube is connected, and the emitter stage of the 6th switching tube is connected to the described first default power supply, the 6th switching tube
Colelctor electrode as it is described detection circuit output end.
7. washing machine detergent detection means according to claim 6, it is characterised in that the detection circuit also includes the
12 resistance and the 13rd resistance, the 12nd resistance are connected between the base stage of the 5th switching tube and emitter stage, institute
The 13rd resistance is stated to be connected between the base stage of the 6th switching tube and emitter stage.
8. washing machine detergent detection means according to claim 7, it is characterised in that the detection circuit also includes：
3rd optocoupler, the first input end of the 3rd optocoupler passes through the colelctor electrode phase of the 14th resistance and the 6th switching tube
Even, the second input end grounding of the 3rd optocoupler, the first output end of the 3rd optocoupler passes through the 15th resistance and second
Default power supply is connected, the second output head grounding of the 3rd optocoupler；
16th resistance, one end of the 16th resistance is connected with the first output end of the 3rd optocoupler, and the described 16th
The other end of resistance is connected with the controller.
9. a kind of washing machine, it is characterised in that including the washing machine detergent detection according to any one of claim 1-8
Device.
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| CN201710174675.1A CN106930056B (en) | 2017-03-22 | 2017-03-22 | Washing machine and detergent detection device thereof |
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| CN201710174675.1A CN106930056B (en) | 2017-03-22 | 2017-03-22 | Washing machine and detergent detection device thereof |
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| CN112695491A (en) * | 2019-10-23 | 2021-04-23 | 无锡飞翎电子有限公司 | Clothes treatment equipment, control method and device thereof and readable medium |
| WO2022021969A1 (en) * | 2020-07-30 | 2022-02-03 | 青岛海尔洗衣机有限公司 | Washing machine |
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| CN106930056B (en) | 2020-04-14 |
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