CN106868779B - A kind of washing machine water amount control system - Google Patents
A kind of washing machine water amount control system Download PDFInfo
- Publication number
- CN106868779B CN106868779B CN201710138272.1A CN201710138272A CN106868779B CN 106868779 B CN106868779 B CN 106868779B CN 201710138272 A CN201710138272 A CN 201710138272A CN 106868779 B CN106868779 B CN 106868779B
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- Prior art keywords
- host
- washing machine
- controller
- triode
- resistance
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- Expired - Fee Related
Links
- 238000005406 washing Methods 0.000 title claims abstract description 63
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 239000007788 liquid Substances 0.000 claims abstract description 31
- 238000004891 communication Methods 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 230000001105 regulatory effect Effects 0.000 claims abstract description 4
- 239000003990 capacitor Substances 0.000 claims description 18
- 239000004065 semiconductor Substances 0.000 claims description 13
- 230000001276 controlling effect Effects 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 5
- 238000002604 ultrasonography Methods 0.000 claims 1
- 230000033228 biological regulation Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 208000033748 Device issues Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005662 electromechanics Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000029610 recognition of host Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
- D06F33/00—Control of operations performed in washing machines or washer-dryers
-
- 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
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
- D06F39/08—Liquid supply or discharge arrangements
- D06F39/087—Water level measuring or regulating devices
-
- D06F2202/085—
-
- D06F2204/084—
-
- D06F2204/086—
Abstract
The invention discloses a kind of washing machine water amount control systems, including host controller, from machine controller, host solenoid valve and slave solenoid valve, it is preset by key module to host controller and from machine controller, host sensor measures the corresponding voltage value of current level, using host controller is sent into after A/D conversion module analog-to-digital conversion compared with setting value, host controller passes through control host electromagnetism valve regulation washing machine liquid level；Host controller transmits setting value to from machine controller by communication interface, passes through control slave electromagnetism valve regulating flow from machine controller；After slave sensor acquires washing machine inflow amount data, host controller successively is sent to through A/D converter, from machine controller and communication interface.Washing machine water amount control system of the present invention detects the liquid fluctuating situation in washing machine using ultrasonic sensor, to judge whether washing machine water level can make washing machine be optimal washing state, accuracy is high.
Description
Technical field
The present invention relates to a kind of control system, specifically a kind of washing machine water amount control system.
Background technique
When using laundry drum machine washing of clothes, after being impregnated with clothing with water, water level did not had clothing；Because of washing machine
It is using the friction between clothing and washing machine drum, locker room, clothing and water by clothing wash clean, if water lets off more, clothing
Between it is not compact and cause friction reduce, washing effect is bad instead, if clothing does not have conversely, water level did not have clothing
Situations such as having and come into full contact with water, causing the dry friction of clothing, washing effect is even more bad, also will cause the damage of clothing.
Currently, part washing machine require controller can weight to clothing and material carry out fuzzy discrimination；Fuzzy detection side
Method realize it is substantially as follows: connect respectively by two o'clock control motor forward and backward two silicon-controlled output points on namely motor
Each endpoint of forward and backward winding.After MCU disconnection forward and backward is silicon-controlled, motor is because inertia can also rotate, according in bucket
The difference of laundry amounts and material, inertia size is also different, shows that the circle number exactly rotated is different, this information is by MCU
It reads, carries out analysis judgement.Although this method may be implemented to control, but control is ineffective, and many situations can all be judged by accident,
Such as the error that the difference and weight of different materials judge, due to judging precision and controlling the limitation of precision, this method can not reality
The original design intention of existing " water level did not had clothing, was optimal washing state ".
Summary of the invention
It is mentioned above in the background art to solve the purpose of the present invention is to provide a kind of washing machine water amount control system
Problem.
To achieve the above object, the invention provides the following technical scheme:
A kind of washing machine water amount control system, including host controller, from machine controller, host solenoid valve and slave electromagnetism
Valve, host solenoid valve discharge water for controlling washing machine, and slave solenoid valve is for controlling washing machine inflow, by key module to master
It machine controller and is preset from machine controller, host sensor measures the corresponding voltage value of current level, converts using A/D
Host controller is sent into after module analog-to-digital conversion compared with setting value, host controller passes through control host electromagnetism valve regulation laundry
Machine liquid level；Host controller transmits setting value to from machine controller by communication interface, from machine controller by controlling from electromechanics
Magnetic valve regulating flow；After slave sensor acquires washing machine inflow amount data, successively through A/D converter, from machine controller and logical
Communication interface is sent to host controller.
As a further solution of the present invention: the host controller knows liquid surface wave in washing machine by host sensor
Emotionally condition controls host solenoid valve and slave solenoid valve remains off, if liquid surface wave if liquid fluctuating is greater than preset value
It is dynamic to be less than preset value, then control host solenoid valve opening and externally discharge water, if host sensor can not detect liquid level, control from
Electromechanical magnet valve is opened, and washing machine inflow is controlled.
As a further solution of the present invention: the host controller connects host solenoid valve, driving by driving circuit
Circuit includes that triode VT1, resistance R1, capacitor C1, metal-oxide-semiconductor VS and the one end triode VT2, the resistance R1 are separately connected resistance
R3, resistance R2 and triode VT2 collector, the resistance R3 other end are separately connected triode VT2 emitter and host controller, institute
Resistance R1 other end connecting triode VT1 base stage is stated, triode VT1 collector connects the resistance R2 other end, triode VT1 transmitting
Pole is separately connected resistance R5, resistance R4 and triode VT2 base stage, and the resistance R4 other end is separately connected capacitor C1, triode VT3 collection
The pole G of electrode and metal-oxide-semiconductor VS, the D connection host solenoid valve of metal-oxide-semiconductor VS, the host solenoid valve other end connect power supply VCC, metal-oxide-semiconductor
The pole S of VS is separately connected the capacitor C1 other end, resistance R6 and capacitor C2 and is grounded, and it is another that the resistance R6 other end is separately connected capacitor C2
One end and triode VT3 emitter, triode VT3 base stage connect the resistance R5 other end.
As a further solution of the present invention: the A/D conversion module and A/D converter are all made of chip IC L7135.
As a further solution of the present invention: the host controller and being all made of single-chip microcontroller from machine controller.
As a further solution of the present invention: the single-chip microcontroller uses pic16f917.
As a further solution of the present invention: the communication interface uses RS485 communication interface.
As a further solution of the present invention: the host sensor uses ultrasonic sensor.
As further scheme of the invention: the ultrasonic sensor model S18UUA.
Compared with prior art, the beneficial effects of the present invention are: washing machine water amount control system of the present invention uses ultrasonic wave
Sensor detects the liquid fluctuating situation in washing machine, to judge whether washing machine water level can be such that washing machine reaches
To optimal washing state, accuracy height.
Detailed description of the invention
Fig. 1 is the schematic block circuit diagram of washing machine water amount control system.
Fig. 2 is the circuit diagram of driving circuit in washing machine water amount control system.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig. 1~2, in the embodiment of the present invention, a kind of washing machine water amount control system, including host controller, from
Machine controller, host solenoid valve and slave solenoid valve, host solenoid valve discharge water for controlling washing machine, and slave solenoid valve is for controlling
Washing machine inflow processed is preset by key module to host controller and from machine controller, and host sensor is measured currently
The corresponding voltage value of water level, using after A/D conversion module analog-to-digital conversion, feeding host controller is compared with setting value, host control
Device processed passes through control host electromagnetism valve regulation washing machine liquid level；Host controller is set by communication interface to from machine controller transmission
Definite value passes through control slave electromagnetism valve regulating flow from machine controller；After slave sensor acquires washing machine inflow amount data, according to
It is secondary to be sent to host controller through A/D converter, from machine controller and communication interface.
The host controller knows liquid fluctuating situation in washing machine by host sensor, if liquid fluctuating is greater than in advance
If value, then illustrate that washing machine internal amount of liquid is optimum state, between the clothing and clothing of washing machine internal, clothing and liquid it
Between friction level be also optimum state, control host solenoid valve and slave solenoid valve at this time and remain off；If liquid surface wave
It is dynamic to be less than preset value, then illustrate that washing machine internal amount of liquid is more, because of more liquid, in washing machine work, liquid level
Ability held stationary controls host solenoid valve at this time and opens and externally discharge water, and during discharging water, the detection of host sensor moment is worked as
Preceding water level conditions close host solenoid valve until setting value indicates that liquid fluctuating is greater than preset value；If host sensor can not be examined
Liquid level is measured, indicates that liquid is very little in washing machine at this time, controls slave solenoid valve at this time and open, control washing machine inflow, water inlet
In the process, slave sensor calculates the flow of water inlet, while the host sensor moment detects current level situation, until setting value
It indicates that liquid fluctuating is greater than preset value, closes slave solenoid valve.
The A/D conversion module and A/D converter are all made of chip IC L7135.The host controller and slave control
Device is all made of single-chip microcontroller pic16f917.The communication interface uses RS485 communication interface.
Ultrasonic sensor is a kind of Miniature Sensor, although it is small in size, there are other larger sensors to be had
Some functions, easy to install and use and not by the Color influences of testee, there are many ad hoc functions, such as: there is temperature to mend
It repays function, analog quantity or output switch parameter etc. may be selected；Its supply voltage is 10~30V, and measurement range is 30mm~300mm,
Output voltage 0V~10V, output electric current are 4mA~20mA, 2.5 Europe of minimum load impedance, and precision can reach 0.5mm, shape point
For linear type and perpendicular type.Induction bore is 18mm.
Condition possessed by ultrasonic sensor meets the requirement that the level error that design is wanted is no more than ± 0.3cm,
And solve the problems, such as that installation is inconvenient, so the design host sensor has selected precision high, small ultrasonic wave is passed
Sensor S18UUA.
The specific principle of ultrasonic sensor detection liquid level is as follows in the present invention: ultrasonic sensor being needed to work
When, ultrasonic sensor constantly issues ultrasonic signal and receives the ultrasonic signal of return, and received return signal passes through A/D
Conversion module feeds back to host controller, and the time difference that host controller is fed back according to unlike signal draws width dynamic
Liquid level figure the mean range of this dynamic Liquid Surface figure is compared with preset value, in 5s to judge liquid fluctuating
Concrete condition.
Using 4 half double integration A/D converter ICL7135, polarity automatic conversion output, automatic school high with precision
Zero, single power supply work, the output of dynamic binary-coded decimal.Since the quadratic integral time of double integrator method is long, so A/D is converted
Speed is slow, usually (3~10) it is secondary/s, in addition, being zero to the interference signal of mechanical periodicity integral, interference free performance also compares
Good, in the case where equal accuracy, ICL7135 price is lower than successive approximation type a/d converter, thus not high to rate request
Occasion, more preferably in use this kind of A/D converter.
The host controller connects host solenoid valve by driving circuit, and driving circuit includes triode VT1, resistance
R1, capacitor C1, metal-oxide-semiconductor VS and the one end triode VT2, the resistance R1 are separately connected resistance R3, resistance R2 and triode VT2 collection
Electrode, the resistance R3 other end are separately connected triode VT2 emitter and host controller, and the resistance R1 other end connects three poles
Pipe VT1 base stage, triode VT1 collector connect the resistance R2 other end, and triode VT1 emitter is separately connected resistance R5, resistance
R4 and triode VT2 base stage, the resistance R4 other end are separately connected the pole G of capacitor C1, triode VT3 collector and metal-oxide-semiconductor VS,
The D connection host solenoid valve of metal-oxide-semiconductor VS, the host solenoid valve other end connect power supply VCC, and the pole S of metal-oxide-semiconductor VS is separately connected capacitor
The C1 other end, resistance R6 and capacitor C2 are simultaneously grounded, and the resistance R6 other end is separately connected the capacitor C2 other end and triode VT3 transmitting
Pole, triode VT3 base stage connect the resistance R5 other end.
Under normal circumstances, host controller exports low level to driving circuit, and host solenoid valve does not work；When host controls
After device issues high level, triode VT1 base stage obtains bias voltage, and triode VT1 is connected rapidly, triode VT1 emitter electricity
On the one hand stream is sent to triode VT2 base stage, be on the other hand sent to triode VT3 base stage further through resistance R5, cuts triode VT2
Only, triode VT3 is connected, and capacitor C1 is charged by resistance R4, and after capacitor C1 charges to a certain extent, metal-oxide-semiconductor VS conducting is driven
Dynamic host electromagnetic valve work；Although triode VT2 of the present invention is not turned on process in circuit, can remove completely, its
Play the role of isolation in circuit, host solenoid valve and triode VT1 emitter are kept apart by it, improve host
The anti-interference ability of solenoid valve；The effect of capacitor C2 is to utilize its charging current, accelerates the conducting speed of triode VT3, thus
Improve the switching speed of circuit.
In conclusion washing machine water amount control system of the present invention is using ultrasonic sensor to the liquid fluctuating in washing machine
Situation is detected, to judge whether washing machine water level can make washing machine be optimal washing state, accuracy is high.
Modules also need to be driven by electricity in present system, this point is general knowledge known in this field, and the present invention does not have this
There is particular/special requirement, those skilled in the art can voluntarily select suitable power module to be driven when implementing, and not need to pay
Any creative work out.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (8)
1. a kind of washing machine water amount control system, which is characterized in that including host controller, from machine controller, host solenoid valve
With slave solenoid valve, host solenoid valve discharges water for controlling washing machine, and slave solenoid valve is for controlling washing machine inflow, by pressing
Key module is preset to host controller and from machine controller, and host sensor measures the corresponding voltage value of current level, then
Host controller is sent into after A/D conversion module analog-to-digital conversion compared with setting value, host controller passes through control host electricity
Magnet valve adjusts washing machine liquid level；Host controller transmits setting value to from machine controller by communication interface, logical from machine controller
Cross control slave electromagnetism valve regulating flow；Slave sensor acquire washing machine inflow amount data after, successively through A/D converter, from
Machine controller and communication interface are sent to host controller；The host controller knows liquid level in washing machine by host sensor
Situation is fluctuated, if liquid fluctuating is greater than preset value, host solenoid valve is controlled and slave solenoid valve remains off, if liquid level
Fluctuation is less than preset value, then controls host solenoid valve opening and externally discharge water, if host sensor can not detect liquid level, control
Slave solenoid valve is opened, and washing machine inflow is controlled.
2. washing machine water amount control system according to claim 1, which is characterized in that the host controller passes through driving
Circuit connection host solenoid valve, driving circuit include triode VT1, resistance R1, capacitor C1, metal-oxide-semiconductor VS and triode VT2, institute
It states the one end resistance R1 and is separately connected resistance R3, resistance R2 and triode VT2 collector, the resistance R3 other end is separately connected triode
VT2 emitter and host controller, the resistance R1 other end connecting triode VT1 base stage, triode VT1 collector connection electricity
The R2 other end is hindered, triode VT1 emitter is separately connected resistance R5, resistance R4 and triode VT2 base stage, the resistance R4 other end point
Not Lian Jie capacitor C1, triode VT3 collector and metal-oxide-semiconductor VS the pole G, the D connection host solenoid valve of metal-oxide-semiconductor VS, host electromagnetism
The valve other end connects power supply VCC, and the pole S of metal-oxide-semiconductor VS is separately connected the capacitor C1 other end, resistance R6 and capacitor C2 and is grounded, electricity
The resistance R6 other end is separately connected the capacitor C2 other end and triode VT3 emitter, and it is another that triode VT3 base stage connects resistance R5
End.
3. washing machine water amount control system according to claim 1, which is characterized in that the A/D conversion module and A/D turn
Parallel operation is all made of chip IC L7135.
4. washing machine water amount control system according to claim 1, which is characterized in that the host controller and slave control
Device processed is all made of single-chip microcontroller.
5. washing machine water amount control system according to claim 4, which is characterized in that the single-chip microcontroller uses
pic16f917。
6. washing machine water amount control system according to claim 1, which is characterized in that the communication interface uses RS485
Communication interface.
7. washing machine water amount control system according to claim 1, which is characterized in that the host sensor is using ultrasound
Wave sensor.
8. washing machine water amount control system according to claim 7, which is characterized in that the ultrasonic sensor model
S18UUA。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710138272.1A CN106868779B (en) | 2017-03-09 | 2017-03-09 | A kind of washing machine water amount control system |
| CN201811378171.2A CN109267291B (en) | 2017-03-09 | 2017-03-09 | Method for detecting liquid level by ultrasonic sensor and water quantity control system of washing machine |
| CN201811379254.3A CN109183355B (en) | 2017-03-09 | 2017-03-09 | Water quantity control system of washing machine and working method thereof |
| CN201811087762.4A CN110219135B (en) | 2017-03-09 | 2017-03-09 | Water quantity control system of washing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710138272.1A CN106868779B (en) | 2017-03-09 | 2017-03-09 | A kind of washing machine water amount control system |
Related Child Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811379254.3A Division CN109183355B (en) | 2017-03-09 | 2017-03-09 | Water quantity control system of washing machine and working method thereof |
| CN201811378171.2A Division CN109267291B (en) | 2017-03-09 | 2017-03-09 | Method for detecting liquid level by ultrasonic sensor and water quantity control system of washing machine |
| CN201811087762.4A Division CN110219135B (en) | 2017-03-09 | 2017-03-09 | Water quantity control system of washing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106868779A CN106868779A (en) | 2017-06-20 |
| CN106868779B true CN106868779B (en) | 2019-01-01 |
Family
ID=59170636
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811087762.4A Active CN110219135B (en) | 2017-03-09 | 2017-03-09 | Water quantity control system of washing machine |
| CN201811379254.3A Active CN109183355B (en) | 2017-03-09 | 2017-03-09 | Water quantity control system of washing machine and working method thereof |
| CN201811378171.2A Active CN109267291B (en) | 2017-03-09 | 2017-03-09 | Method for detecting liquid level by ultrasonic sensor and water quantity control system of washing machine |
| CN201710138272.1A Expired - Fee Related CN106868779B (en) | 2017-03-09 | 2017-03-09 | A kind of washing machine water amount control system |
Family Applications Before (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811087762.4A Active CN110219135B (en) | 2017-03-09 | 2017-03-09 | Water quantity control system of washing machine |
| CN201811379254.3A Active CN109183355B (en) | 2017-03-09 | 2017-03-09 | Water quantity control system of washing machine and working method thereof |
| CN201811378171.2A Active CN109267291B (en) | 2017-03-09 | 2017-03-09 | Method for detecting liquid level by ultrasonic sensor and water quantity control system of washing machine |
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| CN (4) | CN110219135B (en) |
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| CN107657766A (en) * | 2017-10-13 | 2018-02-02 | 陈木镇 | A kind of internet moneychanging system |
| CN111913416A (en) * | 2020-06-30 | 2020-11-10 | 上海电机学院 | Intelligent water economizer and water saving method |
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| CN104862927A (en) * | 2014-02-26 | 2015-08-26 | 无锡小天鹅股份有限公司 | Upward-drainage washing machine and water level control method thereof |
| CN106149309A (en) * | 2015-04-15 | 2016-11-23 | 青岛海尔洗衣机有限公司 | A kind of washing machine and control method thereof |
| CN106480645A (en) * | 2015-08-31 | 2017-03-08 | 青岛海尔洗衣机有限公司 | A kind of water-conservation washing machine method for controlling water level |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0375088A (en) * | 1989-08-17 | 1991-03-29 | Toshiba Corp | Water level detecting device for washing machine or the like |
| US20050166334A1 (en) * | 2004-02-03 | 2005-08-04 | Clouser Michael T. | Washing machine with water control and associated method |
| CN201538896U (en) * | 2009-07-03 | 2010-08-04 | 曲绍麟 | Washing machine |
| US9132455B2 (en) * | 2012-10-29 | 2015-09-15 | Chemfree Corporation | Portable parts washer |
| CN203643005U (en) * | 2013-09-26 | 2014-06-11 | 山东思达特测控设备有限公司 | Frequency signal converter for ultrasonic flow meter |
| CN104202866A (en) * | 2014-08-04 | 2014-12-10 | 上海维芯电子科技有限公司 | Light illumination control system |
| CN104233718B (en) * | 2014-09-17 | 2017-01-11 | 无锡小天鹅通用电器有限公司 | Cold-hot mixed water temperature control method of roller washing machine |
| CN204551071U (en) * | 2015-02-05 | 2015-08-12 | 河海大学 | A kind of Intelligent water injection washing machine |
| JP3197713U (en) * | 2015-02-17 | 2015-06-04 | 明正 須藤 | Wastewater collection container and water storage container |
| CN205223656U (en) * | 2015-10-30 | 2016-05-11 | 芜湖乐佳电器有限公司 | Washing machine level height measurement system |
-
2017
- 2017-03-09 CN CN201811087762.4A patent/CN110219135B/en active Active
- 2017-03-09 CN CN201811379254.3A patent/CN109183355B/en active Active
- 2017-03-09 CN CN201811378171.2A patent/CN109267291B/en active Active
- 2017-03-09 CN CN201710138272.1A patent/CN106868779B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104862927A (en) * | 2014-02-26 | 2015-08-26 | 无锡小天鹅股份有限公司 | Upward-drainage washing machine and water level control method thereof |
| CN106149309A (en) * | 2015-04-15 | 2016-11-23 | 青岛海尔洗衣机有限公司 | A kind of washing machine and control method thereof |
| CN106480645A (en) * | 2015-08-31 | 2017-03-08 | 青岛海尔洗衣机有限公司 | A kind of water-conservation washing machine method for controlling water level |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109183355A (en) | 2019-01-11 |
| CN109183355B (en) | 2020-12-25 |
| CN109267291A (en) | 2019-01-25 |
| CN110219135A (en) | 2019-09-10 |
| CN106868779A (en) | 2017-06-20 |
| CN109267291B (en) | 2021-09-14 |
| CN110219135B (en) | 2021-01-26 |
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