CN105200722A - Constant-temperature control method for washing machine and washing machine - Google Patents
Constant-temperature control method for washing machine and washing machine Download PDFInfo
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- CN105200722A CN105200722A CN201410271585.0A CN201410271585A CN105200722A CN 105200722 A CN105200722 A CN 105200722A CN 201410271585 A CN201410271585 A CN 201410271585A CN 105200722 A CN105200722 A CN 105200722A
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Abstract
The invention relates to a constant-temperature control method for a washing machine. The washing machine controls washing water to be kept at constant temperature in the washing process, and in the washing process, the temperature of the washing water is detected in real time and transmitted into a microprocessor; the temperature deviation value ek of the washing water is calculated through the microprocessor, and whether heating is conducted or not and heating time are controlled through the temperature deviation value of the washing water; the washing water is controlled to be kept at constant temperature. The increment of signals is determined and controlled according to the temperature deviation value ek of the washing water, then is written into a register of a timer, pulse width modulation (PWM) is started, corresponding control signals are output, and then the PWM control signals are converted into temperature commands. A PID control algorithm and PWM are combined, detection is carried out in real time, the signals are fed back in real time, control is carried out in real time, control is precise, the washing water is kept at constant temperature, and the fluctuation range is small. Clothes can achieve a high washing ratio within a short time, and compared with a traditional roller washing machine, the washing time is shorter at the same washing ratio.
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 technology
Roller washing machine, due to its lower wearing and tearing and noise, is more and more subject to liking of consumer, but also there is the clean lower defect long with wash time, becomes the resistance of its development.For these problems, propose a kind of method of constant temp herein, both can improve the clean ratio of roller washing machine, its wash time can have been shortened again.
The temperature of cleaning solution has a great impact for the clean ratio of washing machine, contribute to the dissolving of spot on clothing, the washing machine majority of existing band heating function is roller washing machine, and due to power consumption, the rotary drum washing machine of band heating function also can only be seen in some patents.Roller washing machine with heating function solves conventional drum washing machine and cleans poor defect, but the time of cleaning longer be the weakness of this kind of roller washing machine always, deeply complain by user.
Although roller washing machine heating effectively can improve the dissolution rate of washing powder, improve the activity of washing powder enzyme, contribute to the raising of the clean ratio of clothing, but along with the carrying out of wash time, the temperature of cleaning solution declines gradually, if in winter of cold, the speed of this decline is more obvious, be unfavorable for that so very much the raising of ratio cleaned by clothing, the wash time that roller washing machine is longer simultaneously makes again user produce very large complaint, is unfavorable for the universal of product.
Liquid temp is washed in cylinder constant if keep in washing process, clothing just can realize higher clean ratio in the short period of time so at a constant temperature, compare conventional drum washing machine same clean can be shorter than wash time, contribute to like this shorten wash time.
Given this present invention is proposed.
Summary of the invention
Object of the present invention, for overcoming the deficiencies in the prior art, provides a kind of washing machine constant-temperature control method and washing machine.
In order to realize this object, the present invention adopts following technical scheme: a kind of washing machine constant-temperature control method, and in washing process, washing machine controls washings and maintains constant temperature, is specially: in washing process, detects temperature of washing water in real time and is imported in microprocessor; Microprocessor calculates temperature of washing water deviate e
k, the time of whether heating and heating is controlled according to the size of temperature of washing water deviate; Control washings and maintain constant temperature.
Described temperature of washing water deviate e
kthe difference of temperature of washing water setting value and temperature of washing water detected value, according to temperature of washing water deviate e
ksize determine then to be write the increment of control signal in the register of timer, starting impulse width modulated PWM, export corresponding control signal, then pwm control signal is converted to heat command.
Described temperature of washing water deviate e
kthe minimum of a value of regulation is e
max, the register of described timer is m position, then the maximum of the increment n of control signal is 2
m,
Work as e
kwhen≤0, then the increment n=2 of control signal
m;
Work as e
k>=e
maxtime, then the increment n=0 of control signal;
Work as 0<e
k<e
maxtime, then adopt Digital PID Algorithm to calculate the increment of control signal, n=d
0*e
k+ d
1*e
k-1+ d
2*e
k-2;
Then n is write in the register of timer.
Work as 0<e
k<e
maxtime,
If during the increment n<0 of control signal calculated, get n=0, this n value is write in the register of timer;
If the increment n>2 of the control signal calculated
mtime, get n=2
m, by the register of this n value write timer.
Described d
0, d
1, d
2obtain for carrying out corresponding parameter tuning by test of many times.
Described pwm control signal is converted to heat command: high level control heater stops heating, and low level control heater starting heats, and adopts the width control system heat time heating time of low and high level.
The increment n of described control signal can arrange the initial value of timer, and the initial value of timer can time of control single chip computer port PWM output low level, thus realize the pulsewidth modulation of PWM, and then control the heat time heating time of heating tube, the increment n=2 of control signal
mtime, heater stops heating; During the increment n=0 of control signal, heater heats always; The increment 0<n<2 of control signal
mtime, the start-stop time of heater is determined by the pulsewidth of PWM.
The temperature of described washings 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 select in multiple values of setting from washing machine of user;
Or temperature of washing water setting value is for be set by user, user is suitable for water temperature range set water temperature setting value according to washing powder, wherein washing machine internal has a water temperature limiting value, temperature of washing water setting value set by user does not allow to exceed this water temperature limiting value, if exceed this water temperature limiting value to have warning reminding.
A kind of washing machine with above-mentioned washing machine constant-temperature control method.
After adopting technical solutions according to the invention, bring following beneficial effect:
1, in washing process, keep washing liquid temp in cylinder constant in the present invention, clothing just can realize higher clean ratio in the short period of time at a constant temperature, compare conventional drum washing machine same clean can be shorter than wash time, contribute to like this shorten wash time.
2, adopt Digital PID Algorithm and pulse width modulation (PWM) to combine, detect in real time, Real-time Feedback signal, controls in real time, and control precisely, washings keep constant temperature, and fluctuation range is little.
3, increase water temperature to report to the police and water temperature Presentation Function, contribute to user and facilitate water temperature condition in understanding cylinder in use.
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Accompanying drawing explanation
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, water intaking valve, 2, draining valve, 3, outer drum for drum washing machine, 4, temperature sensor, 5, microprocessor, 6, water temperature reports to the police, 7, water temperature display, 8, level sensor, 9, heating tube.
Detailed description of the invention
A kind of washing machine constant-temperature control method of the present invention, in washing process, washing machine controls washings and maintains constant temperature, is specially: in washing process, detects temperature of washing water in real time and is imported in microprocessor; Microprocessor calculates temperature of washing water deviate e
k, described temperature of washing water deviate e
kbe the difference of temperature of washing water setting value and temperature of washing water detected value, control the time of whether heating and heating according to the size of temperature of washing water deviate; Control washings and maintain constant temperature.Work as e
kwhen being less than or equal to 0, when namely temperature of washing water detected value is greater than or equal to temperature of washing water setting value, then stop heating, certainly because when temperature of washing water detected value equals temperature of washing water setting value, just stopped heating, the probability that temperature of washing water detected value occurs higher than temperature of washing water setting value situation is very little.As temperature of washing water deviate e
ktime larger, then heat washings, washings heating arranges heater bottom urceolus to heat washings, and described heater can be heating tube always.As temperature of washing water deviate e
ktime less, then adopt PID to control, for the calculating of controlling increment in pid control algorithm, export the width that different n values can change PWM, reach the effect controlling water temperature.
According to temperature of washing water deviate e
ksize determine then to be write the increment of control signal in the register of timer, starting impulse width modulated PWM, export corresponding control signal, then pwm control signal is converted to heat command.
Pulse width modulation (PWM) is that one carries out digitally coded method to analog signal level.By the use of high-resolution counter, modulated being used for of the dutycycle of square wave is encoded to the level of a physical simulation signal.Pwm signal remains numeral, because in given any moment, expires the direct current supply of amplitude or has completely (ON), or completely without (OFF).Voltage or current source are added to fictitious load with the repetition pulse sequence of one logical (ON) or disconnected (OFF) to get on.Namely be namely direct current supply when being added in load time logical, be that power supply is when being disconnected time disconnected.As long as bandwidth is enough, any analogue value can use PWM to encode.
Digital PID Algorithm and pulse width modulation (PWM) combine by the present invention, the increment adopting Digital PID Algorithm to calculate control signal is write in the register of timer, use the width of the increment control algorithm PWM of the control signal of this calculating, control heat time heating time, thus keep washings constant temperature.
Described temperature of washing water deviate e
kthe minimum of a value of regulation is e
max, the register of described timer is m position, then the maximum of the increment n of control signal is 2
m, detect temperature of washing water in real time and imported in microprocessor; Microprocessor calculates temperature of washing water deviate e
k, by this temperature of washing water deviate e
kwith 0, e
maxcompare:
Work as e
kwhen≤0, then the increment n=2 of control signal
m;
Work as e
k>=e
maxtime, then the increment n=0 of control signal;
Work as 0<e
k<e
maxtime, then adopt Digital PID Algorithm to calculate the increment of control signal, n=d
0*e
k+ d
1*e
k-1+ d
2*e
k-2;
Then n is write in the register of timer.
Work as 0<e
k<e
maxtime,
If during the increment n<0 of control signal calculated, get n=0, this n value is write in the register of timer;
If the increment n>2 of the control signal calculated
mtime, get n=2
m, by the register of this n value write timer.
Described d
0, d
1, d
2obtain for carrying out corresponding parameter tuning by test of many times.
Described pwm control signal is converted to heat command: high level control heater stops heating, and low level control heater starting heats, and adopts the width control system heat time heating time of low and high level.Thus keep temperature of washing water constant.
The increment n of described control signal can arrange the initial value of timer, and the initial value of timer can time of control single chip computer port PWM output low level, thus realize the pulsewidth modulation of PWM, and then control the heat time heating time of heating tube, the increment n=2 of control signal
mtime, heater stops heating; During the increment n=0 of control signal, heater heats always; The increment 0<n<2 of control signal
mtime, the start-stop time of heater is determined by the pulsewidth of PWM.The pulsewidth of the size control PWM of n value, the time in the present invention being n value larger PWM output low level is shorter, the time of control heater heating is shorter, and the time that is longer or n value less PWM output low level the time of certain n value larger PWM output low level is longer to be set when to be that washing machine controller is interior programme.
The temperature of described washings determines the activity of washing powder enzyme,
Temperature of washing water setting value is the value set in washing machine, and user can not be arranged and select, and such control system is simple;
Or temperature of washing water setting value is select in multiple values of setting from washing machine of user, and user is suitable for water temperature range according to washing powder and selects water temperature setting value, and the water temperature setting value that such user selects within the specific limits, can not exceed water temperature limiting value;
Or temperature of washing water setting value is for be set by user, user is suitable for water temperature range set water temperature setting value according to washing powder, wherein washing machine internal has a water temperature limiting value, temperature of washing water setting value set by user does not allow to exceed this water temperature limiting value, if exceed this water temperature limiting value to have warning reminding.
There is a washing machine for constant-temperature control method, at least comprise microprocessor, urceolus, temperature sensor, heating tube.Constant-temperature control method carries out primarily of microprocessor, is controlled by closed loop feedback, carries out constant adjustment according to Digital PID Algorithm to water temperature in cylinder, to reach the object of constant temp.
Described washing machine also comprises level sensor, water intaking valve, draining valve etc., during water inlet, water level is controlled, water temperature display, water temperature warning etc. can also be comprised, water temperature is shown to user constantly, user is allowed to connect the more washing parameter of washing machine internal, when the water temperature setting value that water temperature exceedes water temperature limiting value or setting exceedes water temperature limiting value, all can give the alarm, reminding user operates accordingly.
As shown in Figure 1, in constant temp controlling structure figure: figure of the present invention, microprocessor 5 is whole thermostatically controlled cores, is responsible for the collection of water temperature signal and water level signal, and provides corresponding control signal according to gathered signal, control each executing agency; The water temperature of external cylinder of drum-type washing machine 3 is controlled devices, and its water temperature signal is detected in real time by temperature sensor 4, and water level is as another controlled device, and its water level signal is detected in real time by level sensor 8; Cooling-water temperature sensor 4 and level sensor 8 as detecting element, as signal detection part in whole thermostatic control system; Executing agency mainly comprises water intaking valve 1, draining valve 2 and heating tube 9, and water intaking valve 1 is used for the inflow of index drum washing machine, and draining valve 2 mainly washs and terminates to discharge its washings afterwards, and heating tube 9 heats cylinder washed water; Conveniently user uses and points out user, adds water temperature warning 6 and water temperature display 7, contributes to user and facilitates water temperature condition in understanding cylinder in use.
As shown in Figure 2, thermostatic control flow chart of the present invention.When washing machine starts to wash, Microprocessor S3C44B0X water intaking valve is opened, roller washing machine inside starts water filling, the real-time sensed water level height of level sensor, and by detected data feedback to microprocessor, by microprocessor, height of water level is judged, if height of water level does not reach washing setting value, then continue water inlet, otherwise closedown water intaking valve, Microprocessor S3C44B0X heating tube heats the washings in cylinder, now open temp sensor detects water temperature in real time, water temperature signal is fed back to microprocessor, by microprocessor, water temperature is judged, if water temperature does not reach preset value, then heating tube constantly heats water, otherwise stop heating, washing machine starts to wash, washing machine is in the process of washing, temperature sensor is still real-time to be detected water temperature, due in washing process, heat can reduce gradually, water temperature can constantly decline, the activity of washing powder will be reduced like this, be unfavorable for cleaning ratio, by microprocessor being allowed to know the situation of water temperature in cylinder in real time to the detection of water temperature, contrast according to detected water temperature condition and preset value, if water temperature drop, then provide certain control signal to heat heating tube, water temperature is raised, temperature before returning to, otherwise stop heating, the carrying out of moving in circles like this, until at the end of wash time, stop heating, draining is carried out by Microprocessor S3C44B0X draining valve.
In Fig. 2, designated water level is set by user, and user can according to laundry amount from the suitable water level of main separation; Temperature of washing water setting value is the value set in washing machine, and user can not be arranged and select, and such control system is simple; Or temperature of washing water setting value is select in multiple values of setting from washing machine of user, and user is suitable for water temperature range according to washing powder and selects water temperature setting value, and the water temperature setting value that such user selects within the specific limits, can not exceed water temperature limiting value; Or temperature of washing water setting value is for be set by user, user is suitable for water temperature range set water temperature setting value according to washing powder, wherein washing machine internal has a water temperature limiting value, temperature of washing water setting value set by user does not allow to exceed this water temperature limiting value, if exceed this water temperature limiting value to have warning reminding.Microprocessor controls water temperature, and its control algolithm can utilize Digital PID Algorithm, and the difference according to detected water temperature data and preset value extrapolates output signal, controls heating tube and heats water.
As shown in Figure 3, thermostatic control algorithm structure figure of the present invention, adopts 16 bit timing devices, and temperature of washing water setting value is T
set, temperature of washing water detected value is T
read.Its thermostatic control algorithm is as follows: read water temperature value by temperature sensor and imported in microprocessor, microprocessor calculation deviation value, namely the difference between setting value and read value, the increment of control signal is calculated according to the size of deviate, then write in the register of timer, start PWM and export corresponding control command, again pwm control signal is converted to heat command afterwards, the present invention adopts high level control heater to disconnect, and low level control heater is opened.
For the control mode of heating tube, adopt two kinds of control modes, when the difference of detected water temperature and setting value is larger, then heating tube heats always, e
kby being surveyed the difference of water temperature and setting value, e
maxfor the minimum of a value of the detection water temperature of defined and the difference of setting value, if e
kbe greater than e
max, then heating tube heats always; Work as e
kwhen being less than 0, then stop heating; Work as e
kbe less than e
maxtime, then adopt PID to control, for the calculating of controlling increment in pid control algorithm, n=d
0*e
k+ d
1*e
k-1+ d
2*e
k-2, its parameter d
0, d
1, d
2obtain by corresponding parameter tuning; Owing to adopting PWM low and high level width to control heat time heating time, when adopting 16 bit timing device, the maximum of its n is 2
16, according to detected water temperature condition, export the width that different n values can change PWM, reach the effect controlling water temperature.
The foregoing is only the preferred embodiment of the present invention, it should be pointed out that for the ordinary skill in the art, without departing from the principles of the present invention, can also make various deformation and improvement, this also should be considered as protection scope of the present invention.
Claims (9)
1. a washing machine constant-temperature control method, is characterized in that: in washing process, washing machine controls washings and maintains constant temperature, is specially: in washing process, detects temperature of washing water in real time and is imported in microprocessor; Microprocessor calculates temperature of washing water deviate e
k, the time of whether heating and heating is controlled according to the size of temperature of washing water deviate; Control washings and maintain constant temperature.
2. a kind of washing machine constant-temperature control method according to claim 1, is characterized in that: described temperature of washing water deviate e
kthe difference of temperature of washing water setting value and temperature of washing water detected value, according to temperature of washing water deviate e
ksize determine then to be write the increment of control signal in the register of timer, starting impulse width modulated PWM, export corresponding control signal, then pwm control signal is converted to heat command.
3. a kind of washing machine constant-temperature control method according to claim 1 and 2, is characterized in that: described temperature of washing water deviate e
kthe minimum of a value of regulation is e
max, the register of described timer is m position, then the maximum of the increment n of control signal is 2
m,
Work as e
kwhen≤0, then the increment n=2 of control signal
m;
Work as e
k>=e
maxtime, then the increment n=0 of control signal;
Work as 0<e
k<e
maxtime, then adopt Digital PID Algorithm to calculate the increment of control signal, n=d
0*e
k+ d
1*e
k-1+ d
2*e
k-2;
Then n is write in the register of timer.
4. a kind of washing machine constant-temperature control method according to claim 3, is characterized in that: work as 0<e
k<e
maxtime,
If during the increment n<0 of control signal calculated, get n=0, this n value is write in the register of timer;
If the increment n>2 of the control signal calculated
mtime, get n=2
m, by the register of this n value write timer.
5. a kind of washing machine constant-temperature control method according to claim 3 or 4, is characterized in that: described d
0, d
1, d
2obtain for carrying out corresponding parameter tuning by test of many times.
6. a kind of washing machine constant-temperature control method according to claim 2, it is characterized in that: described pwm control signal is converted to heat command and is: high level control heater stops heating, low level control heater starting heats, and adopts the width control system heat time heating time of low and high level.
7. a kind of washing machine constant-temperature control method according to claim 3, it is characterized in that: the increment n of described control signal can arrange the initial value of timer, the initial value of timer can time of control single chip computer port PWM output low level, thus realize the pulsewidth modulation of PWM, and then control the heat time heating time of heating tube, the increment n=2 of control signal
mtime, heater stops heating; During the increment n=0 of control signal, heater heats always; The increment 0<n<2 of control signal
mtime, the start-stop time of heater is determined by the pulsewidth of PWM.
8. according to the arbitrary described a kind of washing machine constant-temperature control method of claim 1-7, it is characterized in that: the temperature of described washings 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 select in multiple values of setting from washing machine of user;
Or temperature of washing water setting value is for be set by user, user is suitable for water temperature range set water temperature setting value according to washing powder, wherein washing machine internal has a water temperature limiting value, temperature of washing water setting value set by user does not allow to exceed this water temperature limiting value, if exceed this water temperature limiting value to have warning reminding.
9. one kind has the washing machine of the arbitrary described washing machine constant-temperature control method of claim 1-8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410271585.0A CN105200722B (en) | 2014-06-18 | 2014-06-18 | A kind of washing machine constant-temperature control method and washing machine |
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| CN201410271585.0A CN105200722B (en) | 2014-06-18 | 2014-06-18 | A kind of washing machine constant-temperature control method and washing machine |
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| CN105200722B CN105200722B (en) | 2019-04-09 |
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| CN111474968A (en) * | 2020-04-30 | 2020-07-31 | 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 |
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| 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 |
| CN116909248A (en) * | 2023-07-25 | 2023-10-20 | 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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| CN109722845A (en) * | 2017-10-31 | 2019-05-07 | 上海小吉互联网科技有限公司 | A kind of independent washing methods for launching enzyme preparation |
| 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 |
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| 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 |
| CN116909248A (en) * | 2023-07-25 | 2023-10-20 | 浙江卓奥科技股份有限公司 | Automatic testing method and device for control panel of washing machine |
| 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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