CN101173474A - Method for checking failures of washing machine electric motor loop and clothes amount detection circuit - Google Patents
Method for checking failures of washing machine electric motor loop and clothes amount detection circuit Download PDFInfo
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- CN101173474A CN101173474A CNA2006101376116A CN200610137611A CN101173474A CN 101173474 A CN101173474 A CN 101173474A CN A2006101376116 A CNA2006101376116 A CN A2006101376116A CN 200610137611 A CN200610137611 A CN 200610137611A CN 101173474 A CN101173474 A CN 101173474A
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Abstract
The invention discloses a method of detecting circuit fault for a washing machine motor, comprising the following steps: to input driving power to the motor and continue the input for a while; to stop inputting driving power to the motor and detect pulse count that is obtained in detection circuit of the amount of clothing per unit time after stop; to judge whether the pulse count per unit time is normal or not; if the pulse count per unit time is normal, the working state of the motor is normal; if not, the working state of the motor is abnormal. The invention meanwhile discloses a method of fault detection of the detection circuit of the amount of clothing, comprising the following steps: to input driving power to the motor and continue the input for a while; to detect pulse count that is obtained in detection circuit of the amount of clothing per unit time; to judge whether the pulse count per unit time is normal or not; if the pulse count per unit time is normal, the working state of the detection circuit of the amount of clothing is normal; if not, the working state of the detection circuit of the amount of clothing is abnormal. The invention solves the problems of fault detection of circuit for a washing machine motor and fault detection of detection circuit of the amount of clothing under the condition without increasing cost.
Description
Technical field
The present invention relates to washing machine, relate in particular to a kind of method that detects washing machine electric motor loop and clothes amount detection circuit fault.
Background technology
Conventional laundry apparatus does not possess the electric motor loop measuring ability, after electric motor loop breaks down, if the user is not aside, washing machine can continue washing process, but in fact motor does not rotate, and cause not washing of clothes, but power and water uses in the same old way, cause the wasting of resources, also delay user's time simultaneously.
Can be specially the fault decision circuitry be set for the electric motor loop of washing machine, realization is to the fault detect of motor for washer, but, this mode will increase cost, for this household electrical appliance of washing machine,, special fault decision circuitry is set for the accidental fault that occurs because its job specification is not extremely important, and then the increase cost, be not wise move.
For above-mentioned reasons, do not increasing under the condition of cost, solving the fault detection problem of washing machine electric motor loop, becoming the problem that needs solve.
Summary of the invention
At above-mentioned defective, the technical problem that the present invention solves is that a kind of method that detects the washing machine electric motor loop fault is provided, and this method is utilized the available circuit of washing machine, need not to increase cost.Simultaneously, the also subsidiary fault that can detect clothes amount detection circuit in the washing machine of this method.
A kind of method that detects the washing machine electric motor loop fault provided by the invention comprises:
11), and continue for some time to motor for washer input driving power;
12) stop to motor for washer input driving power, and when stopping, beginning to detect in the unit interval, from the umber of pulse of laundry of washing machine amount detection circuit acquisition;
13) judge whether described unit interval umber of pulse is normal; If then electric machine operation state is normal; If not, then the duty of motor is unusual.
Preferably, described step 12) specifically comprises:
21) single-chip microcomputer picks up counting in motor for washer input driving power stopping, and receives the pulse of described laundry of washing machine amount detection circuit output;
22) adopt counter SUM2 to described step-by-step counting;
23) timing time reaches set time T2, stops counting;
24) with the count value of counter SUM2 as the unit interval umber of pulse.
Preferably, described step 13) specifically comprises:
31) judge that whether described unit interval umber of pulse is less than threshold value M1; If then enter step 32); If not, then enter step 33);
32) judge that machine operation is unusual, and send alarm signal; Forward step 34 to);
33) judge that machine operation is normal;
34) finishing electrical fault detects.
Preferably, after the described step 12), also comprise:
41), and continue for some time to the reverse driving power of motor for washer input;
42) stop to the reverse driving power of motor for washer input, and when stopping, beginning to detect in the unit interval, from the umber of pulse of laundry of washing machine amount detection circuit acquisition;
In the described step 13), judge above-mentioned steps 12) and step 42) whether the unit interval umber of pulse that obtains normal, if then machine operation is normal; If not, then machine operation is unusual.
Preferably, described judgement unit interval umber of pulse judges whether normally, specifically is determining step 12 respectively) and step 42) whether the unit interval umber of pulse of acquisition normal.
Preferably, described judgement unit interval umber of pulse judges whether normally, specifically is determining step 12) and step 42) whether the sum that obtains of the unit interval umber of pulse addition that obtains normal.
The present invention provides a kind of method that detects laundry of washing machine amount detection circuit fault simultaneously, comprising:
71), and continue for some time to motor for washer input driving power;
72) detect in the unit interval, from the umber of pulse of laundry of washing machine amount detection circuit acquisition;
73) judge whether described unit interval umber of pulse is normal, if then laundry of washing machine amount detection circuit duty is normal; If not, then laundry of washing machine amount detection circuit duty is unusual.
Preferably, described step 72) specifically:
81) single-chip microcomputer picks up counting in motor for washer input driving power, and receives the pulse of described laundry of washing machine amount detection circuit output;
82) adopt counter SUM1 to described step-by-step counting;
83) timing time reaches set time T1, stops counting;
84) with the count value of counter SUM1 as the unit interval umber of pulse.
Preferably, described step 73) specifically comprise:
91) judge that whether described unit interval umber of pulse is less than threshold value M2; If then enter step 92); If not, then enter step 93);
92) judge laundry of washing machine amount detection circuit operation irregularity, and send alarm signal; Forward step 94 to);
93) judge that the laundry of washing machine amount detection circuit is working properly;
94) finish the fault detect of laundry of washing machine amount detection circuit.
Preferably, described step 72) afterwards, also comprise:
101), and continue for some time to the reverse driving power of motor for washer input;
102) detect in the unit interval, from the umber of pulse of laundry of washing machine amount detection circuit acquisition;
Described step 73) in, judge above-mentioned steps 72) and step 102) whether the unit interval umber of pulse that obtains normal, if then the laundry of washing machine amount detection circuit is working properly; If not, laundry of washing machine amount detection circuit operation irregularity then.
The present invention utilizes the clothes amount detection circuit that exists in the existing washing machine, according to a kind of process of the test, obtains the judgement to the washing machine electric motor loop fault state.Simultaneously, this test method also can detect simultaneously the fault state of described clothes amount detection circuit.
The present invention is not increasing under the condition of cost, has solved the fault detection problem of the electric motor loop in the washing machine, makes the washing machine control system can in time know the working condition of electric motor loop, avoids washing machine owing to electrical fault wastes water power, loses time.
The present invention can detect the working condition of clothes amount detection circuit simultaneously along band, in time finds the fault of this circuit.
Description of drawings
Fig. 1 is the laundry of washing machine amount detection circuit;
Fig. 2 be the motor for washer duty just often, the impulse waveform that single-chip microcomputer receives from the laundry of washing machine amount detection circuit;
Fig. 3 is the flow chart of first embodiment of the invention.
The specific embodiment
Please, be the laundry of washing machine amount detection circuit referring to Fig. 1, the alternating voltage frequency signal that this circuit produces when receiving the motor for washer rotation, and produce pulse output in view of the above, the input single-chip microcomputer.Because when the laundry amounts of washing machine was big, the rotary speed of motor will reduce, therefore, the umber of pulse according to the unit interval enters single-chip microcomputer just can obtain the information of the clothes amount in the relevant washing machine when extrapolating the motor rotary speed.Because this circuit belongs to prior art, the method that the present invention proposes only is to utilize to have circuit, therefore, the composition of this circuit is not described in detail at this.
Because circuit shown in Figure 1 can be used to detect the motor speed of washing machine, therefore, this circuit also can be used to know the working condition of motor for washer.
Please referring to Fig. 2, this illustrates the motor for washer duty just often, the impulse waveform that single-chip microcomputer receives.
The waveform in dotted line left side is the waveform of motor for washer when normally rotating among Fig. 2, the waveform of exporting when the dotted line right side is the motor for washer stall among Fig. 2.By diagram as can be known, during the motor for washer operate as normal, single-chip microcomputer receives the impulse wave input of certain frequency, when the motor for washer stall,, still can outwards export pulse because motor can continue rotation a period of time under effect of inertia, but the frequency of this pulse will reduce gradually.When electric motor loop has fault, no matter be that motor damages, still the switch element of controlling motor damages, motor can not rotate, therefore, though during the motor power normal power supply, single-chip microcomputer still can obtain the pulse in dotted line left side, but when stopping after motor power supply, the dotted line right side pulse shown in Figure 2 can not occur.Utilize this principle, just can judge whether motor rotates, thereby know the duty of motor.Simultaneously, because circuit shown in Figure 1 be if when opening circuit, single-chip microcomputer can't obtain any pulse input, therefore, the process that detects the machine operation situation can also be used to detect the fault state of this laundry of washing machine amount detection circuit simultaneously.
Please referring to Fig. 3, this illustrates the flow chart of first embodiment of the invention.This embodiment detects the fault state of motor and the fault state of laundry of washing machine amount detection circuit simultaneously.Below this flow chart is described.
Step S301, initialization.
Described initialization comprises the zero clearing counter, so that the carrying out of subsequent detection work.
Step S302 imports forward drive power supply T1 second to motor, detects the pulse number that is entered single-chip microcomputer in this time by described clothes amount detection circuit simultaneously, and is added to counter SUM1.
Described counter SUM1, when being used for motor input driving power, the pulse number that is entered single-chip microcomputer by described clothes amount detection circuit is counted.During motor input forward drive power supply, should rotate under the motor normal condition; But no matter whether motor rotates, and described single-chip microcomputer all can receive pulse from clothes amount detection circuit.If opening circuit appears in clothes amount detection circuit, then single-chip microcomputer can't receive pulse, if clothes amount detection circuit off and on, then the umber of pulse that receives of single-chip microcomputer can significantly reduce.Therefore, the umber of pulse of this SUM1 accumulative total, whether the work that can be used to weigh clothes amount detection circuit is normal.
Step S303 stops the second to motor input driving power T2, detects the pulse number that is entered single-chip microcomputer in this time by described clothes amount detection circuit simultaneously, and is added to counter SUM2.
Described counter SUM2, when being used for motor stopped to import driving power, the pulse number that is entered single-chip microcomputer by described clothes amount detection circuit is counted.During motor input forward drive power supply, should be rotated in the forward under the motor normal condition; Therefore, when motor stops the rotation, motor can be because action of inertia continues rotation, at this moment, because have remanent magnetism in the motor stator, therefore, motor is equivalent to generator, continue outwards alternating voltage frequency signal that frequency reduces gradually of output, thereby single-chip microcomputer can continue to obtain the output pulse from described clothes amount detection circuit.On the contrary, when machine operation is unusual, because motor is rotation not, perhaps rotary speed is low excessively, when stopping to motor input driving power, motor is outside output AC voltage frequency signal not, the unit interval output pulse that single-chip microcomputer also just can't obtain output pulse or acquisition from described clothes amount detection circuit seldom, these situations can be used to reflect the working condition of motor.Therefore, the umber of pulse of this SUM2 accumulative total, whether the work that can be used to weigh electric motor loop is normal.
Step S304 imports reverse drive power supply T1 second to motor, detects the pulse number that is entered single-chip microcomputer in this time by described clothes amount detection circuit simultaneously, and is added to counter SUM1.
For the machine operation situation is comparatively comprehensively detected, not only to detect the situation of input forward drive power supply, also to detect the situation of input reverse drive power supply, whether all be in normal condition, therefore need input reverse drive power supply T1 second with forward and reverse working condition of determining motor.Simultaneously, when also detecting input reverse drive power supply, the working condition of clothes amount detection circuit.
Step S305 stops the second to motor input driving power T2, detects the pulse number that is entered single-chip microcomputer in this time by described clothes amount detection circuit simultaneously, and is added to counter SUM2.
This step is used to detect motor when reverse rotation, and whether duty is normal.
Step S306 judges whether to reach predetermined test number (TN) N; If not, then return step S302; If then enter next step.
For fear of the experimental mistake of chance, can be with above-mentioned test procedure repeated several times.Certainly, only need once generally also can obtain correct testing result.
Step S307 judges that whether the SUM2 pulse number that obtains is less than threshold value M1; If then enter step S309; If not, then enter step S310.
The value of usage counter SUM2 is judged the working condition of motor.Described threshold value M1, when being the motor operate as normal, the lower limit of the umber of pulse that described SUM2 accumulated, this numerical value can obtain by test.If the umber of pulse that counter SUM2 is accumulated is lower than this numerical value, illustrate that motor does not rotate or rotary speed is slow excessively, can judge the electric motor loop operation irregularity.
Step S308 judges that whether the SUM1 pulse number that obtains is less than M2; If then enter step S311; If not, then enter step S312;
The value of usage counter SUM1, the working condition of judgement clothes amount detection circuit.Described threshold value M2, when being the motor operate as normal, the lower limit of the umber of pulse that described SUM1 accumulated, this numerical value can obtain by test.If the umber of pulse that counter SUM1 is accumulated is lower than this numerical value, illustrates that clothes amount detection circuit opens circuit or off and on, can judge the clothes amount detection circuit operation irregularity.
Step S309 judges the electric motor loop operation irregularity, and the processing of reporting to the police accordingly enters step S313 then.
Step S310 judges that electric motor loop is working properly, enters step S313.
Step S311 judges the clothes amount detection circuit operation irregularity, and the processing of reporting to the police accordingly enters step S313 then.
Step S312 judges that clothes amount detection circuit is working properly, enters step S313.
Step S313 finishes.
In the foregoing description, adopt to motor input forward, reverse driving power, and repeated several times obtains the reliable detection conclusion.In fact, only importing the forward drive power supply carries out one-time detection and generally also can obtain correct conclusion.Because this method does not increase any circuit, therefore be a kind of method that washing machine detects automatically that is suitable for use in.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a method that detects the washing machine electric motor loop fault is characterized in that, comprising:
11), and continue for some time to motor for washer input driving power;
12) stop to motor for washer input driving power, and when stopping, beginning to detect in the unit interval, from the umber of pulse of laundry of washing machine amount detection circuit acquisition;
13) judge whether described unit interval umber of pulse is normal; If then electric machine operation state is normal; If not, then the duty of motor is unusual.
2. method according to claim 1 is characterized in that, described step 12) specifically comprises:
21) single-chip microcomputer picks up counting in motor for washer input driving power stopping, and receives the pulse of described laundry of washing machine amount detection circuit output;
22) adopt counter SUM2 to described step-by-step counting;
23) timing time reaches set time T2, stops counting;
24) with the count value of counter SUM2 as the unit interval umber of pulse.
3. method according to claim 2 is characterized in that, described step 13) specifically comprises:
31) judge that whether described unit interval umber of pulse is less than threshold value M1; If then enter step 32); If not, then enter step 33);
32) judge that machine operation is unusual, and send alarm signal; Forward step 34 to);
33) judge that machine operation is normal;
34) finishing electrical fault detects.
4. require 1 to 3 each described method according to claim, it is characterized in that, after the described step 12), also comprise:
41), and continue for some time to the reverse driving power of motor for washer input;
42) stop to the reverse driving power of motor for washer input, and when stopping, beginning to detect in the unit interval, from the umber of pulse of laundry of washing machine amount detection circuit acquisition;
In the described step 13), judge above-mentioned steps 12) and step 42) whether the unit interval umber of pulse that obtains normal, if then machine operation is normal; If not, then machine operation is unusual.
5. method according to claim 4 is characterized in that, described judgement unit interval umber of pulse judges whether normally, specifically is determining step 12 respectively) and step 42) whether the unit interval umber of pulse of acquisition normal.
6. method according to claim 4 is characterized in that, described judgement unit interval umber of pulse judges whether normally, specifically is determining step 12) and step 42) whether the sum that obtains of the unit interval umber of pulse addition that obtains normal.
7. a method that detects laundry of washing machine amount detection circuit fault is characterized in that, comprising:
71), and continue for some time to motor for washer input driving power;
72) detect in the unit interval, from the umber of pulse of laundry of washing machine amount detection circuit acquisition;
73) judge whether described unit interval umber of pulse is normal, if then laundry of washing machine amount detection circuit duty is normal; If not, then laundry of washing machine amount detection circuit duty is unusual.
8. method according to claim 7 is characterized in that, described step 72) specifically:
81) single-chip microcomputer picks up counting in motor for washer input driving power, and receives the pulse of described laundry of washing machine amount detection circuit output;
82) adopt counter SUM1 to described step-by-step counting;
83) timing time reaches set time T1, stops counting;
84) with the count value of counter SUM1 as the unit interval umber of pulse.
9. method according to claim 8 is characterized in that, described step 73) specifically comprise:
91) judge that whether described unit interval umber of pulse is less than threshold value M2; If then enter step 92); If not, then enter step 93);
92) judge laundry of washing machine amount detection circuit operation irregularity, and send alarm signal; Forward step 94 to);
93) judge that the laundry of washing machine amount detection circuit is working properly;
94) finish the fault detect of laundry of washing machine amount detection circuit.
10. according to each described method of claim 7 to 9, it is characterized in that described step 72) afterwards, also comprise:
101), and continue for some time to the reverse driving power of motor for washer input;
102) detect in the unit interval, from the umber of pulse of laundry of washing machine amount detection circuit acquisition;
Described step 73) in, judge above-mentioned steps 72) and step 102) whether the unit interval umber of pulse that obtains normal, if then the laundry of washing machine amount detection circuit is working properly; If not, laundry of washing machine amount detection circuit operation irregularity then.
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| CN2006101376116A CN101173474B (en) | 2006-11-01 | 2006-11-01 | Method for checking failures of washing machine electric motor loop and clothes amount detection circuit |
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| CN2006101376116A CN101173474B (en) | 2006-11-01 | 2006-11-01 | Method for checking failures of washing machine electric motor loop and clothes amount detection circuit |
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| CN103205875A (en) * | 2013-04-01 | 2013-07-17 | 慈溪市小金鱼电器厂 | Intelligent washing machine control system |
| CN104090513A (en) * | 2014-07-15 | 2014-10-08 | 无锡飞翎电子有限公司 | Novel pulse signal detecting method |
| CN104631036A (en) * | 2013-11-06 | 2015-05-20 | 三星电子株式会社 | Washing machine and control method thereof |
| CN105759206A (en) * | 2016-02-22 | 2016-07-13 | 珠海格力电器股份有限公司 | Fan state detection protection system |
| CN107287844A (en) * | 2017-07-11 | 2017-10-24 | 合肥美的洗衣机有限公司 | Water level determination method and system and clothes treatment device |
| CN108627713A (en) * | 2017-03-21 | 2018-10-09 | 佛山市顺德海尔电器有限公司 | A kind of washing machine system for detecting electrical property |
| CN111197240A (en) * | 2018-10-30 | 2020-05-26 | 合肥美的洗衣机有限公司 | Washing machine motor fault detection method and device and washing machine |
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| WO2003097921A1 (en) * | 2002-05-16 | 2003-11-27 | Lg Electronics Inc. | Apparatus and method for detecting malfunction of a clutch of washing machine |
| CN1316096C (en) * | 2002-06-07 | 2007-05-16 | 乐金电子(天津)电器有限公司 | Perception method for clothings quantum of washing machine |
| CN1316100C (en) * | 2002-06-07 | 2007-05-16 | 乐金电子(天津)电器有限公司 | Perception method for clothings quantum of washing machine |
| CN1712628A (en) * | 2004-06-14 | 2005-12-28 | 乐金电子(天津)电器有限公司 | Drier with transmission belt fracture detection and its control |
| CN2795379Y (en) * | 2005-03-22 | 2006-07-12 | 郭庆余 | Fault detection alarm device for motor module of electronic door lock |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103205875A (en) * | 2013-04-01 | 2013-07-17 | 慈溪市小金鱼电器厂 | Intelligent washing machine control system |
| CN104631036A (en) * | 2013-11-06 | 2015-05-20 | 三星电子株式会社 | Washing machine and control method thereof |
| CN104090513A (en) * | 2014-07-15 | 2014-10-08 | 无锡飞翎电子有限公司 | Novel pulse signal detecting method |
| CN105759206A (en) * | 2016-02-22 | 2016-07-13 | 珠海格力电器股份有限公司 | Fan state detection protection system |
| CN108627713A (en) * | 2017-03-21 | 2018-10-09 | 佛山市顺德海尔电器有限公司 | A kind of washing machine system for detecting electrical property |
| CN107287844A (en) * | 2017-07-11 | 2017-10-24 | 合肥美的洗衣机有限公司 | Water level determination method and system and clothes treatment device |
| CN107287844B (en) * | 2017-07-11 | 2020-03-27 | 合肥美的洗衣机有限公司 | Water level determination method and system and clothes treatment device |
| CN111197240A (en) * | 2018-10-30 | 2020-05-26 | 合肥美的洗衣机有限公司 | Washing machine motor fault detection method and device and washing machine |
| CN111197240B (en) * | 2018-10-30 | 2022-05-17 | 合肥美的洗衣机有限公司 | Washing machine motor fault detection method and device and washing machine |
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