CN105200722B - A kind of washing machine constant-temperature control method and washing machine - Google Patents
A kind of washing machine constant-temperature control method and washing machine Download PDFInfo
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- CN105200722B CN105200722B CN201410271585.0A CN201410271585A CN105200722B CN 105200722 B CN105200722 B CN 105200722B CN 201410271585 A CN201410271585 A CN 201410271585A CN 105200722 B CN105200722 B CN 105200722B
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Abstract
The present invention relates to a kind of washing machine constant-temperature control method, washing machine control washing water maintains constant temperature in washing process, and in washing, real-time detection temperature of washing water is passed in microprocessor；Microprocessor calculates temperature of washing water deviation ek, the time heated and heated is controlled whether according to the size of temperature of washing water deviation；It controls washing water and maintains constant temperature.According to temperature of washing water deviation ekSize determine the increment of control signal, be then written into the register of timer, starting impulse width modulated PWM, export corresponding control signal, then pwm control signal is converted into heat command.It is combined using Digital PID Algorithm and pulse width modulation (PWM), real-time detection, Real-time Feedback signal, real-time control, precisely, washing water keeps constant temperature for control, and fluctuation range is small.Clothing can realize higher clean ratio in a relatively short period of time, can be shorter compared to the same clean ratio wash time of conventional drum washing machine.
Description
Technical field
The present invention relates to washing facility field, especially a kind of washing machine constant-temperature control method and washing machine.
Background technique
Roller washing machine is increasingly liked by consumer due to its lower abrasion and noise, but there is also clean
The long defect of relatively low and wash time, becomes the resistance of its development.For these problems, set forth herein a kind of constant temps
Method not only can be improved the clean ratio of roller washing machine, but also can shorten its wash time.
The temperature of cleaning solution has a great impact for the clean ratio of washing machine, facilitates the dissolution of spot on clothing, existing
Washing machine majority of some with heating function is roller washing machine, due to power consumption, the impeller laundry with heating function
Machine can only also be seen in some patents.Roller washing machine with heating function solve conventional drum washing machine clean it is poor
Defect, but clean the time it is longer be always this kind of roller washing machine weakness, it is deep to be complained by user.
Although roller washing machine heats the dissolution rate that can effectively improve washing powder, the activity of washing powder enzyme is improved, is helped
In the raising of the clean ratio of clothing, but with the progress of wash time, the temperature of cleaning solution is gradually reduced, if it is in cold
The speed in winter, this decline is more obvious, is unfavorable for very much the raising of clothing clean ratio in this way, while roller washing machine is longer
Wash time makes user generate very big complaint again, is unfavorable for the universal of product.
If keeping in washing process, cleaning solution temperature is constant in roller, and clothing can be shorter at a constant temperature in this way
Higher clean ratio can be realized in time, can be shorter compared to the same clean ratio wash time of conventional drum washing machine, this
Sample helps to shorten wash time.
Given this present invention is proposed.
Summary of the invention
It is an object of the present invention to overcome the deficiencies of the prior art and provide a kind of washing machine constant-temperature control method and washing machine.
In order to realize the purpose, the present invention adopts the following technical scheme: a kind of washing machine constant-temperature control method, washing process
Middle washing machine control washing water maintains constant temperature, specifically: in washing process, real-time detection temperature of washing water is passed to micro process
In device；Microprocessor calculates temperature of washing water deviation ek, controlled whether to heat according to the size of temperature of washing water deviation
And the time of heating；It controls washing water and maintains constant temperature.
The temperature of washing water deviation ekIt is the difference of temperature of washing water setting value Yu temperature of washing water detected value, according to
Temperature of washing water deviation ekSize come determine control signal increment, be then written into the register of timer, open
Moving pulse width modulated PWM exports corresponding control signal, then pwm control signal is converted to heat command.
The temperature of washing water deviation ekDefined minimum value is emax, the register of the timer is m, then controls
The maximum value of the increment n of signal processed is 2m,
Work as ekWhen≤0, then the increment n=2 of signal is controlledm；
Work as ek≥emaxWhen, then control the increment n=0 of signal；
As 0 < ek<emaxWhen, then the increment of control signal, n=d are calculated using Digital PID Algorithm0*ek+d1*ek-1+d2*
ek-2；
It then will be in the register of n write-in timer.
As 0 < ek<emaxWhen,
It, will be in the register of n value write-in timer if taking n=0 when the increment n < 0 of the control signal calculated；
If increment n > 2 of the control signal calculatedmWhen, take n=2m, will be in the register of n value write-in timer.
The d0、d1、d2It is obtained to carry out corresponding parameter tuning by test of many times.
The pwm control signal is converted to heat command are as follows: high level controls heater and stops heating, and low level control adds
Hot device starting heating controls heating time using the width of low and high level.
The initial value of timer can be set in the increment n of the control signal, and the initial value of timer can control monolithic generator terminal
Mouth PWM exports the low level time, to realize the pulsewidth modulation of PWM, and then controls the heating time of heating tube, controls signal
Increment n=2mWhen, heater stops heating；When controlling the increment n=0 of signal, heater is heated always；Control the increasing of signal
Measure 0 < n < 2mWhen, the start-stop time of heater is determined by the pulsewidth of PWM.
The temperature of the washing water determines the activity of washing powder enzyme,
Temperature of washing water setting value is the value set in washing machine；
Or temperature of washing water setting value is what user selected from the multiple values set in washing machine；
Or temperature of washing water setting value is to be set by user, user is suitable for water temperature range setting water according to washing powder
Warm setting value, wherein washing machine internal has a water temperature limiting value, and temperature of washing water setting value set by user does not allow to surpass
The water temperature limiting value is crossed, if being more than that the water temperature limiting value has warning reminding.
A kind of washing machine with above-mentioned washing machine constant-temperature control method.
After technical solutions according to the invention, bring it is following the utility model has the advantages that
1, cleaning solution temperature is constant in holding roller in washing process by the present invention, and clothing can be shorter at a constant temperature
Time in can realize higher clean ratio, compared to the same clean ratio wash time of conventional drum washing machine can be shorter,
Facilitate to shorten wash time in this way.
2, it is combined using Digital PID Algorithm and pulse width modulation (PWM), real-time detection, Real-time Feedback signal, it is real
When control, precisely, washing water keeps constant temperature, and fluctuation range is small for control.
3, increase water temperature alarm and water temperature display function, facilitate user and be easy to understand water temperature condition in cylinder when in use.
A specific embodiment of the invention is described in further detail with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is constant temp controlling structure figure of the present invention.
Fig. 2 is thermostatic control program flow diagram of the present invention.
Fig. 3 is thermostatic control algorithm structure figure of the present invention.
Wherein: 1, inlet valve, 2, drain valve, 3, outer drum for drum washing machine, 4, temperature sensor, 5, microprocessor, 6, water
Temperature alarm, 7, water temperature show, 8, water level sensor, 9, heating tube.
Specific embodiment
A kind of washing machine constant-temperature control method of the present invention, washing machine control washing water maintains constant temperature in washing process,
Specifically: in washing process, real-time detection temperature of washing water is passed in microprocessor；Microprocessor calculates temperature of washing water
Deviation ek, the temperature of washing water deviation ekIt is the difference of temperature of washing water setting value Yu temperature of washing water detected value, according to
The size of temperature of washing water deviation come control whether heat and heat time；It controls washing water and maintains constant temperature.Work as ekIt is less than
Or be equal to 0 when, that is, temperature of washing water detected value be greater than or equal to temperature of washing water setting value when, then stop heating, certainly
Because just having stopped heating when temperature of washing water detected value is equal to temperature of washing water setting value, temperature of washing water detected value is high
In the probability very little that temperature of washing water setting value situation occurs.As temperature of washing water deviation ekWhen larger, then always to washing
Water is heated, and washing water heating is that outer cylinder bottom setting heater heats washing water, and the heater can be heating tube.
As temperature of washing water deviation ekWhen smaller, then controlled using PID, the calculating for controlling increment in pid control algorithm,
Exporting different n values can change the width of PWM, achieve the effect that control water temperature.
According to temperature of washing water deviation ekSize come determine control signal increment, be then written into timer
In register, starting impulse width modulated PWM exports corresponding control signal, then pwm control signal is converted to temperature life
It enables.
Pulse width modulation (PWM) is that a kind of pair of analog signal level carries out digitally coded method.Pass through high-resolution meter
The use of number device, the duty ratio of square wave is modulated to be encoded for the level to a physical simulation signal.Pwm signal is still
It is digital, because at given any moment, the direct current supply of full amplitude or has (ON) completely or entirely without (OFF).
Voltage or current source are to be added to what fictitious load got on the repetition pulse sequence of a kind of logical (ON) or disconnected (OFF).When logical
When time is that direct current supply is added in load, when being that power supply is disconnected when disconnected.As long as bandwidth is enough, appoint
What analogue value can use PWM to be encoded.
The present invention combines Digital PID Algorithm and pulse width modulation (PWM), is calculated using Digital PID Algorithm
The increment of control signal is written into the register of timer, uses the width of the increment control algorithm PWM of the control signal of the calculating
Degree controls heating time, to keep washing water termostat.
The temperature of washing water deviation ekDefined minimum value is emax, the register of the timer is m, then controls
The maximum value of the increment n of signal processed is 2m, real-time detection temperature of washing water is passed in microprocessor；Microprocessor calculating is washed
Wash coolant-temperature gage deviation ek, by temperature of washing water deviation ekWith 0, emaxIt is compared:
Work as ekWhen≤0, then the increment n=2 of signal is controlledm；
Work as ek≥emaxWhen, then control the increment n=0 of signal；
As 0 < ek<emaxWhen, then the increment of control signal, n=d are calculated using Digital PID Algorithm0*ek+d1*ek-1+d2*
ek-2；
It then will be in the register of n write-in timer.
As 0 < ek<emaxWhen,
It, will be in the register of n value write-in timer if taking n=0 when the increment n < 0 of the control signal calculated；
If increment n > 2 of the control signal calculatedmWhen, take n=2m, will be in the register of n value write-in timer.
The d0、d1、d2It is obtained to carry out corresponding parameter tuning by test of many times.
The pwm control signal is converted to heat command are as follows: high level controls heater and stops heating, and low level control adds
Hot device starting heating controls heating time using the width of low and high level.To keep temperature of washing water constant.
The initial value of timer can be set in the increment n of the control signal, and the initial value of timer can control monolithic generator terminal
Mouth PWM exports the low level time, to realize the pulsewidth modulation of PWM, and then controls the heating time of heating tube, controls signal
Increment n=2mWhen, heater stops heating；When controlling the increment n=0 of signal, heater is heated always；Control the increasing of signal
Measure 0 < n < 2mWhen, the start-stop time of heater is determined by the pulsewidth of PWM.The size of n value controls the pulsewidth of PWM, is n in the present invention
Value is bigger, and the PWM output low level time is shorter, and the time of control heater heating is shorter, and certain bigger PWM of n value exports low electricity
The flat time is longer or the smaller PWM of n value exports the low level time and longer sets when being programming in washing machine controller
's.
The temperature of the washing water determines the activity of washing powder enzyme,
Temperature of washing water setting value is the value set in washing machine, and user cannot be provided and selected, in this way control system
System is simple；
Or temperature of washing water setting value is that user selects from the multiple values set in washing machine, user according to
Washing powder is suitable for that water temperature range selects water temperature setting value, the water temperature setting value of such user selection in a certain range, Bu Huichao
Cross water temperature limiting value；
Or temperature of washing water setting value is to be set by user, user is suitable for water temperature range setting water according to washing powder
Warm setting value, wherein washing machine internal has a water temperature limiting value, and temperature of washing water setting value set by user does not allow to surpass
The water temperature limiting value is crossed, if being more than that the water temperature limiting value has warning reminding.
A kind of washing machine with constant-temperature control method includes at least microprocessor, outer cylinder, temperature sensor, heating tube.
Constant-temperature control method is mainly carried out by microprocessor, by closed loop feedback control, according to Digital PID Algorithm to water temperature in cylinder
Constant adjusting is carried out, to achieve the purpose that constant temp.
The washing machine further includes water level sensor, inlet valve, drain valve etc., and when water inlet controls water level, may be used also
To include water temperature is shown, water temperature is alarmed etc., water temperature is constantly shown to user, allows user to connect washing machine internal and more washs
Parameter can all be sounded an alarm, be mentioned when water temperature is more than water temperature limiting value more than water temperature limiting value or the water temperature setting value of setting
The user that wakes up carries out corresponding operation.
As shown in Figure 1, constant temp controlling structure figure of the present invention: microprocessor 5 is entire thermostatically controlled core in figure, is responsible for
The acquisition of water temperature signal and water level signal, and corresponding control signal is provided according to signal collected, control each execution machine
Structure；The water temperature of external cylinder of drum-type washing machine 3 is controlled device, and water temperature signal is detected by 4 real-time perfoming of temperature sensor, and water level
As another controlled device, water level signal is detected by 8 real-time perfoming of water level sensor；Water temperature sensor 4 and level sensor
Device 8 is used as detecting element, and signal detection part is used as in entire thermostatic control system；Executing agency mainly include inlet valve 1,
Drain valve 2 and heating tube 9, inlet valve 1 are used to control the inflow of roller washing machine, and drain valve 2 is right after mainly washing
Its washing water is discharged, and 9 pairs of cylinder washed waters of heating tube heat；User is used and prompted in order to facilitate user, is increased
Water temperature alarm 6 and water temperature show 7, facilitate user and are easy to understand water temperature condition in cylinder when in use.
As shown in Fig. 2, thermostatic control flow chart of the present invention.When washing machine starts washing, microprocessor control inlet valve is beaten
It opens, starts to fill the water inside roller washing machine, water level sensor real-time detection height of water level, and by data feedback detected to micro-
Processor judges height of water level by microprocessor, if height of water level not up to washs setting value, continues to intake,
Otherwise inlet valve is closed, microprocessor control heating tube heats the washing water in cylinder, and opening temperature sensor is real at this time
When detect water temperature, water temperature signal is fed back into microprocessor, water temperature is judged by microprocessor, if water temperature is not up to pre-
If value, then heating tube constantly heats water, otherwise stops being heated, washing machine starts to be washed；Washing machine is being washed
During washing, temperature sensor still in real time detects water temperature, since in washing process, heat can be gradually decreased, water temperature
It can constantly decline, can thus reduce the activity of washing powder, be unfavorable for clean ratio, micro process can be allowed by the detection to water temperature
Device knows the case where water temperature in cylinder in real time, is compared according to water temperature condition detected with preset value, if water temperature drop,
It provides certain control signal to heat heating tube, increases water temperature, otherwise the temperature before being restored to stops being added
Heat, the progress to move in circles in this way, at the end of wash time, stopping heated, by microprocessor control drain valve into
Row draining.
It sets water level in Fig. 2 to be set by user, user can independently select suitable water level according to laundry amount；
Temperature of washing water setting value is the value set in washing machine, and user cannot be provided and selected, and such control system is simple；Or
Person's temperature of washing water setting value is what user selected from the multiple values set in washing machine, and user is suitable for according to washing powder
Water temperature range selects water temperature setting value, and the water temperature setting value of such user's selection in a certain range, does not exceed the water temperature limit
Value；Or temperature of washing water setting value is to be set by user, user is suitable for that water temperature range set water temperature is set according to washing powder
Definite value, wherein washing machine internal has a water temperature limiting value, and temperature of washing water setting value set by user does not allow more than this
Water temperature limiting value, if being more than that the water temperature limiting value has warning reminding.Microprocessor controls water temperature, and control algolithm can
To utilize Digital PID Algorithm, output signal is extrapolated according to the difference of detected water temperature data and preset value, controls heating tube pair
Water is heated.
As shown in figure 3, thermostatic control algorithm structure figure of the present invention, using 16 bit timing devices, temperature of washing water setting value is
Tset, temperature of washing water detected value is Tread.Its thermostatic control algorithm is as follows: reading water temperature value by temperature sensor and is passed to
In microprocessor, microprocessor calculates deviation, i.e. difference between setting value and reading value, is counted according to the size of deviation
The increment for calculating control signal, is then written into the register of timer, and starting PWM exports corresponding control command, later
Pwm control signal is converted into heat command again, the present invention is disconnected using high level control heater, low level control heater
It opens.
For the control mode of heating tube, using two kinds of control modes, when the difference of water temperature detected and setting value is larger
When, then heating tube is heated always, ekTo be surveyed the difference of water temperature and setting value, emaxFor the detection water temperature and setting of defined
The minimum value of the difference of value, if ekGreater than emax, then heating tube heats always；Work as ekWhen less than 0, then stop heating；Work as ekIt is less than
emaxWhen, then it is controlled using PID, the calculating for controlling increment in pid control algorithm, n=d0*ek+d1*ek-1+d2*ek-2,
Its parameter d0、d1、d2It can be obtained by corresponding parameter tuning；Due to controlling heating time using PWM low and high level width,
When using 16 bit timing device, the maximum value of n is 216, according to water temperature condition detected, exporting different n values be can change
The width of PWM achievees the effect that control water temperature.
The foregoing is merely the preferred embodiment of the present invention, it is noted that for those of ordinary skill in the art and
Speech, without departing from the principles of the present invention, can also make various deformation and improvement, this also should be considered as protection of the invention
Range.
Claims (7)
1. a kind of washing machine constant-temperature control method, it is characterised in that: washing machine control washing water maintains constant temperature, tool in washing process
Body are as follows: in washing process, real-time detection temperature of washing water is passed in microprocessor；It is inclined that microprocessor calculates temperature of washing water
Difference ek, the time heated and heated is controlled whether according to the size of temperature of washing water deviation；It controls washing water and remains permanent
Temperature；The temperature of washing water deviation ekIt is the difference of temperature of washing water setting value Yu temperature of washing water detected value, according to washing
Coolant-temperature gage deviation ekSize come determine control signal increment, be then written into the register of timer, start arteries and veins
Width modulated PWM is rushed, exports corresponding control signal, then pwm control signal is converted into heat command；The temperature of washing water
Deviation ekDefined minimum value is emax, the register of the timer is m, then the maximum value for controlling the increment n of signal is
2m,
Work as ekWhen≤0, then the increment n=2 of signal is controlledm；
Work as ek≥emaxWhen, then control the increment n=0 of signal；
As 0 < ek<emaxWhen, then the increment of control signal, n=d are calculated using Digital PID Algorithm0*ek+d1*ek-1+d2*
ek-2；
It then will be in the register of n write-in timer.
2. a kind of washing machine constant-temperature control method according to claim 1, it is characterised in that: as 0 < ek<emaxWhen,
It, will be in the register of n value write-in timer if taking n=0 when the increment n < 0 of the control signal calculated；
If increment n > 2 of the control signal calculatedmWhen, take n=2m, will be in the register of n value write-in timer.
3. a kind of washing machine constant-temperature control method according to claim 1, it is characterised in that: the d0、d1、d2To pass through
Test of many times carries out corresponding parameter tuning and obtains.
4. a kind of washing machine constant-temperature control method according to claim 1, it is characterised in that: the pwm control signal turns
It is changed to heat command are as follows: high level controls heater and stops heating, low level control heater starting heating, using low and high level
Width control heating time.
5. a kind of washing machine constant-temperature control method according to claim 1, it is characterised in that: the increment of the control signal
The initial value of timer can be set in n, and the initial value of timer can control one-chip machine port PWM and export the low level time, thus
It realizes the pulsewidth modulation of PWM, and then controls the heating time of heating tube, control the increment n=2 of signalmWhen, heater stops adding
Heat；When controlling the increment n=0 of signal, heater is heated always；Control increment 0 < n < 2 of signalmWhen, when the start and stop of heater
Between determined by the pulsewidth of PWM.
6. -5 any a kind of washing machine constant-temperature control method according to claim 1, it is characterised in that: the washing water
Temperature determines the activity of washing powder enzyme,
Temperature of washing water setting value is the value set in washing machine；
Or temperature of washing water setting value is what user selected from the multiple values set in washing machine；
Or temperature of washing water setting value is to be set by user, user is suitable for that water temperature range set water temperature is set according to washing powder
Definite value, wherein washing machine internal has a water temperature limiting value, and temperature of washing water setting value set by user does not allow more than this
Water temperature limiting value, if being more than that the water temperature limiting value has warning reminding.
7. a kind of washing machine with any washing machine constant-temperature control method of claim 1-6.
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| CN109722845B (en) * | 2017-10-31 | 2020-12-29 | 上海小吉互联网科技有限公司 | Washing method for independently adding enzyme preparation |
| CN107865624B (en) * | 2017-11-24 | 2023-09-26 | 佛山市顺德区美的洗涤电器制造有限公司 | Basin dish washer and washing control method thereof |
| CN112301640B (en) * | 2019-08-08 | 2022-04-01 | 无锡小天鹅电器有限公司 | Control method of clothes treatment device, clothes treatment device and storage medium |
| CN111474968B (en) * | 2020-04-30 | 2021-09-07 | 厦门中翎易优创科技有限公司 | Temperature control method and system of temperature therapeutic apparatus |
| CN112006590A (en) * | 2020-08-04 | 2020-12-01 | 广东康贝思特医疗科技有限公司 | Bedridden patient nurses bed with bed stool pot's nursing system after shit |
| CN113204194A (en) * | 2021-05-25 | 2021-08-03 | 广东机电职业技术学院 | Washing machine water temperature control method, system and medium based on fuzzy neural network |
| CN116909248B (en) * | 2023-07-25 | 2024-04-19 | 浙江卓奥科技股份有限公司 | Automatic testing method and device for control panel of washing machine |
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