CN114990842B - Door switch detection method for drum washing machine - Google Patents
Door switch detection method for drum washing machine Download PDFInfo
- Publication number
- CN114990842B CN114990842B CN202210760014.8A CN202210760014A CN114990842B CN 114990842 B CN114990842 B CN 114990842B CN 202210760014 A CN202210760014 A CN 202210760014A CN 114990842 B CN114990842 B CN 114990842B
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- door
- washing machine
- computer board
- signal
- door lock
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- 238000005406 washing Methods 0.000 title claims abstract description 49
- 238000001514 detection method Methods 0.000 title claims abstract description 42
- 230000003287 optical effect Effects 0.000 claims abstract description 21
- 238000002955 isolation Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 8
- 206010063385 Intellectualisation Diseases 0.000 claims abstract description 3
- 238000012360 testing method Methods 0.000 claims description 16
- 239000003990 capacitor Substances 0.000 claims description 9
- 230000005684 electric field Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004899 c-terminal region Anatomy 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
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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
- D06F33/00—Control of operations performed in washing machines or washer-dryers
- D06F33/30—Control of washing machines characterised by the purpose or target of the control
-
- 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
- D06F34/20—Parameters relating to constructional components, e.g. door sensors
-
- 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
- D06F34/28—Arrangements for program selection, e.g. control panels therefor; Arrangements for indicating program parameters, e.g. the selected program or its progress
- D06F34/32—Arrangements for program selection, e.g. control panels therefor; Arrangements for indicating program parameters, e.g. the selected program or its progress characterised by graphical features, e.g. touchscreens
-
- 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
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/40—Opening or locking status of doors
-
- 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
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/38—Conditioning or finishing, e.g. control of perfume injection
-
- 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
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/44—Opening, closing or locking of doors
-
- 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
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/58—Indications or alarms to the control system or to the user
-
- 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
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/58—Indications or alarms to the control system or to the user
- D06F2105/60—Audible signals
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Abstract
The invention discloses a door switch detection method of a drum washing machine, which comprises the following steps: the washing machine is electrified, and a strong electric L line of commercial power enters a door lock; the washing machine computer board is provided with two door switch detection circuits connected to the door lock, namely a first optical coupler isolation detection circuit and a first optical coupler isolation detection circuit, and the on-off of a fire wire is converted into a door lock weak current signal and a door switch weak current signal through the first optical coupler isolation detection circuit and is transmitted to the main transformer integrated computer board MCU; the washing machine consists of two control boards, namely a main transformer integrated computer board MCU and a display computer board MCU, wherein the main transformer integrated computer board MCU transmits detected signals to the display computer board MCU through a serial port line function; the display computer board MCU uniformly processes signals, finally achieves the intellectualization of the washing machine, when the washing machine is finished, the door lock can be automatically opened, and when the door is not opened, the user is informed to forget to dry clothes, and the display is carried out through voice broadcasting and WiFi-app reminding notification and the nixie tube flashing indicator lamp.
Description
Technical field:
the invention relates to a door switch detection method of a drum washing machine, which belongs to the technical field of household appliances.
The background technology is as follows:
with the continuous development of economy and technology, users have more intelligent requirements on the functions of the washing machine. The conventional drum washing machine can only detect whether the door lock is locked, and does not have a function of detecting whether the door is opened or closed. After washing, the clothes are forgotten to be taken out, and the user cannot receive report information.
Therefore, there is a need for an improvement over the prior art to address the deficiencies of the prior art.
The invention comprises the following steps:
the invention provides a door switch detection method of a drum washing machine, which is used for solving the problems in the prior art, and the door switch detection is added on the basis of the traditional drum washing machine so as to judge the state of a door.
The invention adopts the technical scheme that: a door switch detection method of a drum washing machine comprises the following steps:
step one: the washing machine is electrified, and a strong electric L line of commercial power enters a door lock;
step two: the washing machine computer board is provided with two door switch detection circuits connected to the door lock, namely a first optical coupler isolation detection circuit and a second optical coupler isolation detection circuit, and the on-off of a fire wire is converted into a door lock weak current signal and a door switch weak current signal through the first optical coupler isolation detection circuit and the second optical coupler isolation detection circuit and then transmitted to the main transformer integrated computer board MCU;
step three: the washing machine consists of two control boards, namely a main transformer integrated computer board MCU and a display computer board MCU, wherein the main transformer integrated computer board MCU transmits detected signals to the display computer board MCU through a serial port line function;
step four: the display computer board MCU uniformly processes signals, so that the intellectualization of the washing machine is finally realized, when the washing machine is finished, the door lock can be automatically opened, and when the door is not opened, the user is informed to forget to dry clothes, and the display is performed through voice broadcasting and WiFi-app reminding notification and a nixie tube flashing indicator lamp;
step five: when judging that the clothes are not taken out for a long time for airing, the washing machine shakes the clothes, and blows air to remove smell.
Further, the door lock is in a three-wire connection mode, namely an end A, an end B and an end C, wherein the end A is a door lock control wire, the end B is a door lock mains supply inlet wire, the end C is a door lock outlet wire, the circuit components are connected with a mains supply N-wire circuit and a door switch detection circuit double circuit according to the end A, the end B is connected with a mains supply L-wire, and the end C is connected with the door switch detection circuit and the electric device equipment.
Further, the door switch detection circuit converts a strong current region side signal on the door lock into a weak current region side signal, and the weak current region side signal is a frequency signal of 50 Hz.
Further, the strong electric field side: in the DOOR closing state, a gate switch live wire signal CTL-DOOR has a commercial power L signal, and is connected with a front stage of an optical coupler IC19 through a diode D23 and two current limiting resistors R78 and R79 to form a loop with a commercial power zero line N, and a resistor R80, a diode D14 and a capacitor C57 are connected in parallel on the loop formed by the CTL-DOOR, the diode D23, the current limiting resistor R78, the current limiting resistor R79, the optical coupler IC19 and the commercial power zero line N.
Further, the weak current region side: the resistor R81, the resistor R82, the resistor R84 and the triode Q21 are connected in series to form a loop, the resistor R83 and the capacitor C58 are connected in parallel to the loop, a signal on the collector of the triode Q21 passes through the resistor R110, and the capacitor C59 is connected in parallel to form a DOOR-TEST signal.
Further, when the optocoupler IC19 is turned on, the base of the triode Q21 is in a low level state, the triode Q21 is turned off, the DOOR-TEST signal detected by the main transformer integrated computer board MCU is at a high level of 5V, when the optocoupler IC19 is turned off, the base of the triode Q21 is at a high level, the triode Q21 is turned on, and the DOOR-TEST signal is at a low level.
Further, when the gate is closed, the optocoupler IC19 is turned on and off periodically, and the corresponding DOOR-TEST signal is a 50Hz square wave signal.
Further, when the gate is opened, the optocoupler IC19 is always in the off state, and the corresponding DOOR-TEST signal is a low level signal.
The invention has the following beneficial effects: the invention detects the signal and judges the state of the gate by designing the circuit. After the washing machine finishes washing, firstly, the door lock is opened, if the door is not opened, the user is reminded to take clothes when the user forgets to take clothes, and the user can be reminded to take clothes through voice, app, a buzzer, a short message and the like. If the clothes are not taken out for a longer time, the clothes are shaken off by the washing machine, and the clothes are blown for deodorization. If the door is not closed after being opened, the user can be reminded as well, and the washing machine is more intelligent.
Description of the drawings:
fig. 1 is a view showing the composition of a door and a door lock.
Fig. 2 is a schematic diagram of a gate switch detection circuit.
Fig. 3 is a schematic diagram of a door opening and closing detection method of a drum washing machine according to the present invention.
The specific embodiment is as follows:
the invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, the door lock is in a three-wire connection mode, wherein the end a is a door lock control wire, the end B is a door lock mains supply wire, and the end C is a door lock wire outlet. The circuit is composed of an A-terminal commercial power N-line circuit and a detection circuit, a B-terminal commercial power L-line, a C-terminal gate switch detection circuit and other electrical equipment.
As shown in fig. 2, the door switch detection circuit can convert a strong electric signal on the door lock into a weak electric signal, and the weak electric signal is a frequency signal of 50Hz and is the same as the mains frequency.
1. Strong electric field side: in the gate-closed state, the gate switch live wire signal CTL-DOOR has a commercial power L signal, and the gate switch live wire signal CTL-DOOR passes through a diode D23 and then passes through two current limiting resistors R78 and R79, so that the circuit works under a safe small current condition. And the front stage of the optical coupler IC19 is connected with the mains supply zero line N to form a loop, when the mains supply sine wave is in a positive half shaft, the optical coupler is conducted, and when the mains supply sine wave is in a negative half shaft, the optical coupler is not conducted. The conductive and nonconductive optocouplers form a 50Hz frequency signal.
The resistor R80, the diode D14 and the capacitor C57 are connected in parallel on a loop formed by the CTL-DOOR, the diode D23, the current limiting resistor R78, the current limiting resistor R79, the optocoupler IC19 and the mains supply zero line N.
In the gate-on state, CTL-DOOR has no signal, and optocoupler IC19 is always non-conductive, and has no frequency signal of 50 Hz.
2. Weak current region side: resistor R81, resistor R82, resistor R84, and transistor Q21 are connected in series to form a loop, and resistor R83 and capacitor C58 are connected in parallel to the loop. The signal on the collector of transistor Q21 passes through resistor R110 and the parallel capacitor C59 forms the DOOR-TEST signal.
When the optocoupler IC19 is turned on, the base electrode of the triode Q21 is in a low level state, the Q21 is turned off, the DOOR-TEST signal detected by the main control MCU is in a 5V high level, and when the optocoupler IC19 is turned off, the base electrode of the triode Q21 is in a high level, the triode Q21 is turned on, and the DOOR-TEST signal is in a low level.
So when the gate is closed, the optocoupler IC19 is turned on and off periodically, and the corresponding DOOR-TEST signal is a 50Hz square wave signal.
When the gate is open, the optocoupler IC19 is always in the off state, and the corresponding DOOR-TEST signal is a low signal. Through the circuit, the main control MCU can sense the DOOR switch state by detecting the DOOR-TEST signal state.
As shown in fig. 3, the door state 01 of the washing machine determines the opening and closing of one signal line of the door lock state 03 of the washing machine. When the washing machine is electrified, the commercial power strong electricity L line 02 can enter the door lock. The computer board is provided with two door switch detection circuits connected to the door lock, namely a first optical coupler isolation detection circuit 04 and a second optical coupler isolation detection circuit 05. The on-off of the fire wire is converted into a weak current signal through an optical coupler isolation detection circuit and then transmitted to a main transformer integrated computer board MCU08, such as a door lock weak current signal 06 and a door switch weak current signal 07 in the figure.
The washing machine consists of two control boards, namely a main transformer integrated computer board MCU08 and a display computer board MCU09. The main transformer integrated computer board MCU08 transmits the detected signal to the display computer board MCU09 through the serial port line function. The use of the unified processing signal by the computer board MCU09 is shown. Finally, the intelligent washing machine is realized, when the washing machine is finished, the door lock can be automatically opened, when the door is not opened, the user is informed of forgetting to dry clothes, the notification can be announced by voice 10 and WiFi-app11, and the nixie tube blinks and indicates lamp 12 to display. When judging that the clothes are not taken out for a long time for airing, the washing machine can shake off the clothes, blow air and remove smell, and healthy washing is realized.
The invention relates to a door switch detecting system of drum washing machine, which detects the open or close principle of door, and comprises: when the door is opened, the door connecting switch is in an open state, at the moment, the A end cannot detect the L signal of the mains supply, and the corresponding isolation detection circuit also cannot generate weak current signals. When the door is closed, the door connecting switch is in a closed state, at the moment, the end A can detect a mains supply L signal, and a frequency signal of 50Hz is generated by a corresponding isolation detection circuit.
The foregoing is merely a preferred embodiment of the invention, and it should be noted that modifications could be made by those skilled in the art without departing from the principles of the invention, which modifications would also be considered to be within the scope of the invention.
Claims (8)
1. A door switch detection method of a drum washing machine is characterized in that: the method comprises the following steps:
step one: the washing machine is electrified, and a strong electric L line (02) of commercial power enters a door lock;
step two: the washing machine computer board is provided with two door switch detection circuits connected to the door lock, namely a first optical coupler isolation detection circuit (04) and a second optical coupler isolation detection circuit (05), and the on-off of a fire wire is converted into a door lock weak current signal (06) and a door switch weak current signal (07) through the first optical coupler isolation detection circuit (04) and the second optical coupler isolation detection circuit (05) and transmitted to the main transformer integrated computer board MCU (08);
step three: the washing machine consists of two control boards, namely a main transformer integrated computer board MCU (08) and a display computer board MCU (09), wherein the main transformer integrated computer board MCU (08) transmits detected signals to the display computer board MCU (09) through a serial port line function;
step four: the display computer board MCU (09) uniformly processes signals, so that the intellectualization of the washing machine is finally realized, when the washing machine is finished, the door lock can be automatically opened, and when the door is not opened, the user is informed of forgetting to air clothes, and the display computer board MCU (09) and the WiFi-app (11) are used for reminding and informing through the voice broadcast (10) and the WiFi-app, and the nixie tube is used for flashing and displaying through the indicating lamp (12);
step five: when judging that the clothes are not taken out for a long time for airing, the washing machine shakes the clothes, and blows air to remove smell.
2. The door opening and closing detection method of a drum washing machine as claimed in claim 1, wherein: the door lock is in a three-wire connection mode, namely an end A, an end B and an end C, wherein the end A is a door lock control wire, the end B is a door lock mains supply inlet wire, the end C is a door lock outlet wire, the circuit components are double circuits of an A-terminal mains supply N-wire circuit and a door switch detection circuit, the end B is an L-terminal mains supply, and the end C is connected with the door switch detection circuit and electric device equipment.
3. The door opening and closing detection method of a drum washing machine as claimed in claim 2, wherein: the door switch detection circuit converts a strong current area side signal on the door lock into a weak current area side signal, and the weak current area side signal is a frequency signal of 50 Hz.
4. A door opening and closing detecting method of a drum washing machine as claimed in claim 3, wherein: strong electric field side: in the DOOR closing state, a gate switch live wire signal CTL-DOOR has a commercial power L signal, and is connected with a front stage of an optical coupler IC19 through a diode D23 and two current limiting resistors R78 and R79 to form a loop with a commercial power zero line N, and a resistor R80, a diode D14 and a capacitor C57 are connected in parallel on the loop formed by the CTL-DOOR, the diode D23, the current limiting resistor R78, the current limiting resistor R79, the optical coupler IC19 and the commercial power zero line N.
5. The door opening and closing detecting method of drum washing machine as claimed in claim 4, wherein: weak current region side: the resistor R81, the resistor R82, the resistor R84 and the triode Q21 are connected in series to form a loop, the resistor R83 and the capacitor C58 are connected in parallel to the loop, a signal on the collector of the triode Q21 passes through the resistor R110, and the capacitor C59 is connected in parallel to form a DOOR-TEST signal.
6. The door opening and closing detection method of drum washing machine as claimed in claim 5, wherein: when the optocoupler IC19 is turned on, the base electrode of the triode Q21 is in a low level state, the triode Q21 is turned off, the DOOR-TEST signal detected by the main transformer integrated computer board MCU (08) is in a high level of 5V, when the optocoupler IC19 is turned off, the base electrode of the triode Q21 is in a high level, the triode Q21 is turned on, and the DOOR-TEST signal is in a low level.
7. The door opening and closing detecting method of drum washing machine as claimed in claim 6, wherein: when the gate is closed, the optocoupler IC19 is periodically turned on and off, and the corresponding DOOR-TEST signal is a 50Hz square wave signal.
8. The door opening and closing detecting method of drum washing machine as claimed in claim 7, wherein: when the gate is open, the optocoupler IC19 is always in the off state, and the corresponding DOOR-TEST signal is a low signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210760014.8A CN114990842B (en) | 2022-06-30 | 2022-06-30 | Door switch detection method for drum washing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210760014.8A CN114990842B (en) | 2022-06-30 | 2022-06-30 | Door switch detection method for drum washing machine |
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| Publication Number | Publication Date |
|---|---|
| CN114990842A CN114990842A (en) | 2022-09-02 |
| CN114990842B true CN114990842B (en) | 2024-03-26 |
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| CN202210760014.8A Active CN114990842B (en) | 2022-06-30 | 2022-06-30 | Door switch detection method for drum washing machine |
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| WO2015021725A1 (en) * | 2013-08-16 | 2015-02-19 | 海尔集团公司 | Door-opening indicator for drum washing machine and door-opening control method therefor |
| DE102014216556A1 (en) * | 2014-08-20 | 2016-02-25 | BSH Hausgeräte GmbH | Circuit arrangement for controlling an electrically driven locking device for a door of a household appliance, household appliance and method for this |
| CN205529536U (en) * | 2016-01-21 | 2016-08-31 | 珠海格力电器股份有限公司 | Washing machine |
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| CN111118811A (en) * | 2020-02-14 | 2020-05-08 | 青岛海尔洗衣机有限公司 | Control method of washing machine and washing machine |
| CN211947603U (en) * | 2020-01-08 | 2020-11-17 | 海信（山东）冰箱有限公司 | Drum washing machine |
| CN113265843A (en) * | 2021-05-24 | 2021-08-17 | 海信（山东）冰箱有限公司 | Washing machine and control method thereof |
| CN113550121A (en) * | 2021-08-17 | 2021-10-26 | 四川虹美智能科技有限公司 | Washing machine door lock state detection method and device |
-
2022
- 2022-06-30 CN CN202210760014.8A patent/CN114990842B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015021725A1 (en) * | 2013-08-16 | 2015-02-19 | 海尔集团公司 | Door-opening indicator for drum washing machine and door-opening control method therefor |
| DE102014216556A1 (en) * | 2014-08-20 | 2016-02-25 | BSH Hausgeräte GmbH | Circuit arrangement for controlling an electrically driven locking device for a door of a household appliance, household appliance and method for this |
| CN106676831A (en) * | 2015-11-11 | 2017-05-17 | 无锡小天鹅股份有限公司 | Washing machine door lock state detecting method and system and washing machine |
| CN205529536U (en) * | 2016-01-21 | 2016-08-31 | 珠海格力电器股份有限公司 | Washing machine |
| CN106988075A (en) * | 2016-01-21 | 2017-07-28 | 珠海格力电器股份有限公司 | Washing machine and its control method and device |
| CN211947603U (en) * | 2020-01-08 | 2020-11-17 | 海信（山东）冰箱有限公司 | Drum washing machine |
| CN111118811A (en) * | 2020-02-14 | 2020-05-08 | 青岛海尔洗衣机有限公司 | Control method of washing machine and washing machine |
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| CN114990842A (en) | 2022-09-02 |
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