CN104195786A

CN104195786A - Fuzzy weighing method and pulsator washing machine

Info

Publication number: CN104195786A
Application number: CN201410277513.7A
Authority: CN
Inventors: 谷虎; 刘玉春; 刘文祥; 文蛟; 湛国庆; 刘阳
Original assignee: Hisense Ronshen Guangdong Refrigerator Co Ltd
Current assignee: Hisense Shandong Refrigerator Co Ltd
Priority date: 2014-06-19
Filing date: 2014-06-19
Publication date: 2014-12-10
Anticipated expiration: 2034-06-19
Also published as: CN104195786B

Abstract

The embodiment of the invention provides a fuzzy weighing method and a pulsator washing machine, and relates to the field of control of pulsator washing machines. The time used for the pulsator washing machine to determine weight of clothes to be washed can be saved, and accordingly washing time is shortened every time. The fuzzy weighing method includes the steps that a motor drives pulsators of the pulsator washing machine to rotate quicker and quicker until the pulsators reach a rated rotation speed; the motor and the pulsators are in the free speed reduction process at the same time, first time used for the pulsators reducing from the first rated rotation speed to a second rated rotation speed is obtained, and the second rated rotation speed is not equal to zero; the weight of the clothes in the pulsator washing machine is determined according to the first time. The fuzzy weighing method is used for the pulsator washing machine to determine the weight of the clothes.

Description

A kind of fuzzy Weighing method and rotary drum washing machine

Technical field

The present invention relates to rotary drum washing machine control field, relate in particular to a kind of fuzzy Weighing method and rotary drum washing machine.

Background technology

In the washing process of rotary drum washing machine, can, according to the Weight control wash time of washing clothes, flooding time, inflow and washing beat, therefore, before washing, generally need to determine the weight of washing clothes.

The method that detects at present the weight of washing clothes is mainly after rotary drum washing machine is put into clothing, controlling motor makes the impeller of rotary drum washing machine along a direction rotation to First Speed, then allow impeller freely slow down, at impeller, from First Speed, be freely decelerated to zero process, obtain the umber of pulse of motor output, according to described umber of pulse, can obtain the weight of clothing in rotary drum washing machine, but while measuring clothes weight by this method, what obtain is that impeller is decelerated to zero umber of pulse from First Speed, so just must experience impeller and from First Speed, be decelerated to zero process, therefore the time taking is longer, while causing rotary drum washing machine to determine washing clothes weight, the used time is longer, and then cause the time of each laundry longer.

Summary of the invention

Embodiments of the invention provide a kind of fuzzy Weighing method and rotary drum washing machine, can save the time that rotary drum washing machine is determined washing clothes weight, and then shorten the time of each laundry.

For achieving the above object, embodiments of the invention adopt following technical scheme:

On the one hand, provide a kind of fuzzy Weighing method, for rotary drum washing machine, the motor of described rotary drum washing machine is external rotor electric machine, and described fuzzy Weighing method comprises:

Described in described driven by motor, the impeller of rotary drum washing machine accelerates rotation to the first specified rotary speed;

Described motor and described impeller, simultaneously in free moderating process, obtain described impeller and from described the first specified rotary speed, are decelerated to the very first time of the second specified rotary speed, and described the second specified rotary speed is non-vanishing;

According to the described very first time, determine the weight of clothing in described rotary drum washing machine.

Optionally, in the impeller acceleration of rotary drum washing machine described in described driven by motor, rotate to the first specified rotary speed, described method also comprises:

Described in described driven by motor, the impeller of rotary drum washing machine continues with described the first specified rotary speed rotation in the first default duration.

Optionally, described, according to the described very first time, before determining the weight of clothing in described rotary drum washing machine, described method also comprises:

Obtained for the second time, described the second time is while there is not clothing in described rotary drum washing machine, and described impeller is decelerated to described the second specified rotary speed time used from described the first specified rotary speed;

Described according to the described very first time, determine that the weight of clothing in described rotary drum washing machine comprises:

According to the difference of the described very first time and described the second time, determine the weight of described clothing;

Or according to the ratio of the described very first time and described the second time, determine the weight of described clothing.

On the one hand, provide a kind of rotary drum washing machine, the motor of described rotary drum washing machine is external rotor electric machine, and described rotary drum washing machine comprises control module, and described control module is used for:

Control described motor, make the impeller of rotary drum washing machine described in described driven by motor accelerate rotation to the first specified rotary speed;

Control described motor, make described motor and described impeller simultaneously in free moderating process;

Described rotary drum washing machine also comprises acquiring unit, for obtaining described impeller, is decelerated to the very first time of the second specified rotary speed from described the first specified rotary speed, and described the second specified rotary speed is non-vanishing;

Determining unit, for according to the described very first time, determines the weight of clothing in described rotary drum washing machine.

Optionally, described control module also for:

Control described motor, the impeller of rotary drum washing machine described in described driven by motor is continued with described the first specified rotary speed rotation in the first default duration.

Optionally, described acquiring unit also for:

Described determining unit specifically for:

On the one hand, provide a kind of fuzzy Weighing method, for rotary drum washing machine, the motor of described rotary drum washing machine is inner rotor motor, and described fuzzy Weighing method comprises:

Described in described driven by motor, the impeller of rotary drum washing machine and wash bucket accelerate rotation to the 3rd specified rotary speed simultaneously;

Described motor, described impeller and described wash bucket are simultaneously in free moderating process, obtain described impeller and described wash bucket and from described the 3rd specified rotary speed, be decelerated to the 3rd time of the 4th specified rotary speed simultaneously, described the 4th specified rotary speed is non-vanishing;

According to described the 3rd time, determine the weight of clothing in described rotary drum washing machine.

Optionally, at the impeller of rotary drum washing machine described in described driven by motor and wash bucket, accelerate rotation to the 3rd specified rotary speed, described method also comprises simultaneously:

Described in described driven by motor, impeller and described wash bucket continue with described the 3rd specified rotary speed rotation simultaneously in the described second default duration.

Optionally, described, according to described the 3rd time, before determining the weight of clothing in described rotary drum washing machine, described method also comprises:

Obtained for the 4th time, described the 4th time is while there is not clothing in described rotary drum washing machine, and described impeller and described wash bucket are decelerated to described the 4th specified rotary speed time used from described the 3rd specified rotary speed simultaneously;

Described according to described the 3rd time, determine that the weight of clothing in described rotary drum washing machine comprises:

According to the difference of described the 3rd time and described the 4th time, determine the weight of described clothing;

Or according to the ratio of described the 3rd time and described the 4th time, determine the weight of described clothing.

Optionally, in described motor, described impeller and described wash bucket while, before free moderating process, described method also comprises:

Clothing in described rotary drum washing machine is sprayed water, and continues the 3rd default duration.

On the one hand, provide a kind of rotary drum washing machine, the motor of described rotary drum washing machine is inner rotor motor, and described rotary drum washing machine comprises control module, and described control module is used for:

Control described motor, make rotary drum washing machine described in described driven by motor impeller and wash bucket accelerate rotation to the 3rd specified rotary speed simultaneously;

Control described motor, make described motor, described impeller and described wash bucket simultaneously in free moderating process;

Described rotary drum washing machine also comprises acquiring unit, for obtaining described impeller and described wash bucket, is decelerated to the 3rd time of the 4th specified rotary speed from described the 3rd specified rotary speed simultaneously, and described the 4th specified rotary speed is non-vanishing;

Determining unit, for according to described the 3rd time, determines the weight of clothing in described rotary drum washing machine.

Optionally, described control module also for:

Control described motor, impeller and described wash bucket described in described driven by motor are continued with described the 3rd specified rotary speed rotation simultaneously in the described second default duration.

Optionally, described acquiring unit also for:

Described determining unit specifically for:

Optionally, described rotary drum washing machine also comprises water spray unit, for the clothing water spray to described rotary drum washing machine, continues the 3rd default duration.

The embodiment of the present invention provides a kind of fuzzy Weighing method and rotary drum washing machine, owing to having adopted above technical scheme, has the following advantages:

(1) if the motor of described rotary drum washing machine is external rotor electric machine, when described rotary drum washing machine carries out fuzzy weighing, first need the motor power supply for described rotary drum washing machine, make the impeller of rotary drum washing machine described in described driven by motor accelerate rotation to the first specified rotary speed, then stop as described motor power supply, make described motor and described impeller simultaneously in free moderating process, obtain described impeller and from described the first specified rotary speed, be decelerated to the very first time of the second specified rotary speed, described the second specified rotary speed is non-vanishing, and then can be according to the described very first time, determine the weight of clothing in described rotary drum washing machine.The rotor of described external rotor electric machine outside, and the quality of described rotor is larger, make the rotary inertia of external rotor electric machine larger, therefore when driven by motor impeller rotates, the rotary inertia of motor and impeller is larger, the moderating process of described impeller can continue the long period, can from the first specified rotary speed, be decelerated to by impeller the weight of definite clothing of time of the second specified rotary speed.Compared to prior art, described rotary drum washing machine is when weighing to the clothing in rotary drum washing machine, do not need to experience described impeller and from the first specified rotary speed, be decelerated to zero process, only need to obtain described impeller and from the first specified rotary speed, continue to be decelerated to the described very first time of the second specified rotary speed, described the second specified rotary speed is non-vanishing, that is to say and the very first time be less than described impeller and wash bucket from the first specified rotary speed, to continue the speed that is decelerated to be zero time used simultaneously, thereby can save the time that described rotary drum washing machine is determined the weight of washing clothes, and then shorten each time of doing washing.

(2) if the motor of described rotary drum washing machine is inner rotor motor, when described rotary drum washing machine carries out fuzzy weighing, first need the motor power supply for described rotary drum washing machine, make impeller and the wash bucket of rotary drum washing machine described in described driven by motor accelerate rotation to the 3rd specified rotary speed simultaneously, then stop as described motor power supply, make described motor, described impeller and described wash bucket are simultaneously in free moderating process, obtain described impeller and described wash bucket and from described the 3rd specified rotary speed, be decelerated to the 3rd time of the 4th specified rotary speed simultaneously, described the 4th specified rotary speed is non-vanishing, and then according to described the 3rd time, determine the weight of clothing in described rotary drum washing machine.The rotor of described inner rotor motor is at center, make the rotary inertia of described inner rotor motor less, when inner rotor motor drives the impeller of described rotary drum washing machine to rotate by belt transmission, the rotary inertia of motor and impeller is less, the time that impeller is decelerated to the 4th specified rotary speed from the 3rd specified rotary speed is very short, while there is clothing in described rotary drum washing machine, due to the frictional force impact between clothing and impeller, the time that impeller is decelerated to the 4th specified rotary speed from the 3rd specified rotary speed is shorter, if therefore the motor of rotary drum washing machine is inner rotor motor, when the clothing in rotary drum washing machine carries out fuzzy weighing, can be so that impeller and wash bucket rotate simultaneously, rotary inertia is larger, and clothing can be followed wash bucket and rotated together, centrifugal force during clothing rotation has further increased rotary inertia, extended the deceleration time of described impeller and wash bucket, therefore can from the 3rd specified rotary speed, be decelerated to the weight of definite clothing of the 3rd time of the 4th specified rotary speed by impeller and wash bucket.Compared to prior art, described rotary drum washing machine is when weighing to the clothing in rotary drum washing machine, do not need to experience described impeller and described wash bucket and from the 3rd specified rotary speed, be decelerated to zero process simultaneously, only need to obtain described impeller and described wash bucket and from the 3rd specified rotary speed, continue to be decelerated to described the 3rd time of the 4th specified rotary speed simultaneously, described the 4th specified rotary speed is non-vanishing, the 3rd time that is to say is less than described impeller and wash bucket, and from the 3rd specified rotary speed, to continue the speed that is decelerated to be zero time used simultaneously, thereby can save the time that described rotary drum washing machine is determined the weight of washing clothes, and then shorten each time of doing washing.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

A kind of fuzzy Weighing method flow chart that Fig. 1 provides for the embodiment of the present invention;

The structural representation of a kind of rotary drum washing machine that Fig. 2 provides for the embodiment of the present invention;

The fuzzy Weighing method flow chart of another kind that Fig. 3 provides for the embodiment of the present invention;

The structural representation of the another kind of rotary drum washing machine that Fig. 4 provides for the embodiment of the present invention;

The structural representation of another rotary drum washing machine that Fig. 5 provides for the embodiment of the present invention.

The specific embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.

The embodiment of the present invention provides a kind of fuzzy Weighing method, and as shown in Figure 1, for rotary drum washing machine, the motor of described rotary drum washing machine is external rotor electric machine, and described fuzzy Weighing method comprises:

Described in step 101, described driven by motor, the impeller of rotary drum washing machine accelerates rotation to the first specified rotary speed.

Concrete, the motor that described rotary drum washing machine can be described rotary drum washing machine by control circuit is powered, and then control described external rotor electric machine and accelerate to rotate, drive the impeller rotation of described rotary drum washing machine to the first specified rotary speed, described the first specified rotary speed is predefined, can arrange according to the concrete condition of rotary drum washing machine, the embodiment of the present invention does not limit this.

Preferably, can accelerate rotation to the first specified rotary speed at described impeller, make described impeller continue to rotate with the first specified rotary speed in the first default duration, the described first default duration is predefined, in practical application, can arrange according to the concrete condition of rotary drum washing machine, the embodiment of the present invention does not limit this.

Step 102, described motor and described impeller, simultaneously in free moderating process, obtain described impeller and from described the first specified rotary speed, are decelerated to the very first time of the second specified rotary speed, and described the second specified rotary speed is non-vanishing.

The rotary drum washing machine that is external rotor electric machine for motor, when the impeller rotation of described rotary drum washing machine is to the first specified rotary speed, described rotary drum washing machine can stop powering for described external rotor electric machine by control circuit, now described motor and impeller, simultaneously in free deceleration regime, then obtain described impeller and from described the first specified rotary speed, are decelerated to the very first time of the second specified rotary speed.

Optionally, the rotary drum washing machine that is external rotor electric machine for motor, the rotary speed of impeller equates with the rotating speed of motor, can determine by the rotating speed of motor the rotary speed of impeller.Example, described motor can configure Hall element, and motor often turns around, 12 pulses of Hall element output, the umber of pulse that then described rotary drum washing machine can be exported by Hall element per second is obtained the rotating speed of motor.Concrete, the first specified rotary speed of supposing impeller is 100 revolutions per seconds, corresponding umber of pulse is 1200 pulses each second, the second specified rotary speed of impeller is 30 revolutions per seconds, corresponding umber of pulse is 360 pulses each second, when the umber of pulse of Hall element output is 1200 of each seconds, the rotary speed of impeller has reached the first specified rotary speed, now timer starts timing and stops as motor power supply, make motor and impeller in deceleration regime, when the umber of pulse of Hall element output is reduced to 360 of each seconds, the rotary speed that represents impeller has reached the second specified rotary speed, timer stops timing, the time that now timer records is the very first time.In practical application, the change frequency of the electromotive force that rotary drum washing machine can also be exported by motor is determined the rotating speed of motor, or lenticular lenses is set on motor, determines the rotating speed of motor by raster count.

Wherein, described the second specified rotary speed is non-vanishing, and described the second specified rotary speed is predefined, can arrange according to the concrete condition of rotary drum washing machine, and the embodiment of the present invention does not limit this.

Preferably, after described impeller continues with the first specified rotary speed rotation in the first default duration, described rotary drum washing machine can continue as motor power supply, then obtains described impeller and from described the first specified rotary speed, is decelerated to the very first time of the second specified rotary speed.

Step 103, according to the described very first time, determine the weight of clothing in described rotary drum washing machine.

Because the motor of described rotary drum washing machine is external rotor electric machine, so the impeller of rotary drum washing machine and external rotor electric machine are coaxial rotation, the rotor of external rotor electric machine outside, and the quality of described rotor is larger, make the rotary inertia of external rotor electric machine larger, therefore when driven by motor impeller rotates, the rotary inertia of motor and impeller is larger, the moderating process of described impeller can continue the long period, can from the first specified rotary speed, be decelerated to by impeller the weight of definite clothing of time of the second specified rotary speed.

When clothing in rotary drum washing machine is more, frictional force between described clothing and impeller is larger, under the impact of described larger frictional force, it is shorter that described impeller is decelerated to the second specified rotary speed very first time used from the first specified rotary speed, when clothing in rotary drum washing machine is less, frictional force between described clothing and impeller is less, under the impact of described less frictional force, it is longer that described impeller is decelerated to the second specified rotary speed very first time used from the first specified rotary speed, so the weight of the clothing in rotary drum washing machine and the described very first time are inversely proportional to.

Optionally, can table corresponding to clothes weight of pre-stored time, the described time from the corresponding table record of clothes weight different time corresponding clothes weight respectively, then according to the very first time, inquire about the time table corresponding to clothes weight prestoring, can determine the weight of the clothing in rotary drum washing machine.

In practical application, also can pre-stored acceleration table corresponding to clothes weight, the corresponding table of described acceleration and clothes weight is corresponding different clothes weight corresponding to acceleration, after getting the described very first time, can, according to the corresponding relation between time and acceleration, obtain the first acceleration corresponding to the described very first time, then according to the first acceleration, inquire about described acceleration table corresponding to clothes weight, can determine the weight of described clothing.

So, when the rotary drum washing machine that is external rotor electric machine at motor is weighed to clothing, the motor that first described rotary drum washing machine can be described rotary drum washing machine by control circuit is powered, and makes the impeller rotation of rotary drum washing machine described in described driven by motor to the first specified rotary speed; After reaching the first specified rotary speed, stop as described motor power supply, make described motor and described impeller simultaneously in free moderating process, then obtain described impeller and from described the first specified rotary speed, be decelerated to the very first time of the second specified rotary speed, described the second specified rotary speed is non-vanishing, finally can, according to the described very first time, determine the weight of clothing in described rotary drum washing machine.Compared to prior art, fuzzy Weighing method described in the embodiment of the present invention, do not need to experience described impeller and continue to be decelerated to zero process from the first specified rotary speed, only need to obtain described impeller and from the first specified rotary speed, continue to be decelerated to the described very first time of the second specified rotary speed, described the second specified rotary speed is non-vanishing, that is to say that the very first time is less than described impeller and was decelerated to for zero time used from the first specified rotary speed, thereby can save the time that described rotary drum washing machine is determined the weight of washing clothes, and then shorten each time of doing washing.

Further, impeller at rotary drum washing machine described in described driven by motor accelerates rotation to the first specified rotary speed, and described motor can also drive the impeller of described rotary drum washing machine in the first default duration, to continue with described the first specified rotary speed rotation.Example, rotary drum washing machine can also continue as described motor power supply, the impeller of rotary drum washing machine described in described driven by motor is continued with described the first specified rotary speed rotation in the first default duration, like this can so that the specified rotary speed of the impeller of rotary drum washing machine stable maintain the first specified rotary speed, avoided the unstable accuracy that reduces described fuzzy Weighing method of speed due to described impeller.

Optionally, described according to the described very first time, before determining the weight of clothing in described rotary drum washing machine, described rotary drum washing machine can also obtain for the second time, described the second time is while there is not clothing in described rotary drum washing machine, described impeller is decelerated to described the second specified rotary speed time used from described the first specified rotary speed, then can, according to the difference of the described very first time and described the second time, determine the weight of described clothing; Or according to the ratio of the described very first time and described the second time, determine the weight of described clothing.In actual applications, if rotary drum washing machine is longer service time, can cause loss comparatively serious, make the frictional force of rotary drum washing machine inside larger, now, if only determine the weight of clothing in rotary drum washing machine by the very first time, the described very first time can comprise that a part of time being caused by the factor of rotary drum washing machine inside changes, the clothes weight that makes to obtain is greater than the actual weight of clothing, if adopt the difference of the described very first time and described the second time to determine the weight of clothing, can get rid of the impact causing due to rotary drum washing machine factor.The ratio of the described very first time of same employing and described the second time, determines the weight of described clothing, also can get rid of the impact causing due to rotary drum washing machine factor.

In practical application, before rotary drum washing machine dispatches from the factory, the second time can be pre-stored in the control chip of rotary drum washing machine, when rotary drum washing machine carries out fuzzy weighing to clothing, can directly from described control chip, obtain for the second time.The concrete steps of obtaining for the second time during initialization are: while there is not clothing in the wash bucket of described rotary drum washing machine, motor power supply for rotary drum washing machine, make described in described driven by motor impeller rotation to described the first specified rotary speed, then stop as described motor power supply, make described motor and described impeller simultaneously in free moderating process, obtain described impeller and be decelerated to described the second specified rotary speed time used as the second time from described the first specified rotary speed.

When rotary drum washing machine longer service time, wear and tear when larger, user also can redeterminate for the second time according to the concrete steps of obtaining for the second time, obtain the second new time, then with described the second new time, update stored in the second time in control chip, improve the degree of accuracy of the fuzzy Weighing method of rotary drum washing machine.

Optionally, described according to the difference of the described very first time and described the second time, while determining the weight of described clothing, can be in advance in the control chip of described rotary drum washing machine memory time poor table corresponding to clothes weight, the described time difference from the corresponding table record of clothes weight the different time differences distinguish corresponding clothes weight; Then can inquire about the time difference table corresponding to clothes weight prestoring according to the difference of the described very first time and described the second time, can determine the weight of described clothing.

Optionally, described according to the ratio of the described very first time and described the second time, while determining the weight of described clothing, can be in the control chip of described rotary drum washing machine pre-stored time ratio table corresponding to clothes weight, described time ratio from the corresponding table record of clothes weight different time ratio corresponding clothes weight respectively; Then according to the ratio of the described very first time and described the second time, inquire about the time ratio table corresponding to clothes weight prestoring, can determine the weight of described clothing.

The embodiment of the present invention provides a kind of fuzzy Weighing method, when the rotary drum washing machine that is external rotor electric machine at motor is weighed to clothing, the motor that can be first described rotary drum washing machine by control circuit is powered, and makes the impeller rotation of rotary drum washing machine described in described driven by motor to the first specified rotary speed; After reaching the first specified rotary speed, stop as described motor power supply, make described motor and described impeller simultaneously in free moderating process, then obtain described impeller and from described the first specified rotary speed, be decelerated to the very first time of the second specified rotary speed, described the second specified rotary speed is non-vanishing, finally can, according to the described very first time, determine the weight of clothing in described rotary drum washing machine.Or obtain while there is no clothing in rotary drum washing machine, described impeller is decelerated to the second specified rotary speed the second time used from the first specified rotary speed, then according to difference or the ratio of the very first time and the second time, determine the weight of clothing in described rotary drum washing machine.Compared to prior art, fuzzy Weighing method described in the embodiment of the present invention, do not need to experience described impeller and continue to be decelerated to zero process from the first specified rotary speed, only need to obtain described impeller and from the first specified rotary speed, continue to be decelerated to the described very first time of the second specified rotary speed, described the second specified rotary speed is non-vanishing, that is to say that the very first time is less than described impeller and was decelerated to for zero time used from the first specified rotary speed, thereby can save the time that described rotary drum washing machine is determined the weight of washing clothes, and then shorten each time of doing washing.Further, because described rotary drum washing machine can also be according to difference or the ratio of the very first time and the second time, determine the weight of clothing in described rotary drum washing machine, can get rid of the impact causing due to rotary drum washing machine factor, improved the accuracy of described fuzzy Weighing method.

The embodiment of the present invention provides a kind of rotary drum washing machine 20, and the motor of described rotary drum washing machine 20 is external rotor electric machine, and as shown in Figure 2, described rotary drum washing machine 20 comprises control module 201, acquiring unit 202 and determining unit 203.

Described control module 201 for: control described motor, make the impeller of rotary drum washing machine 20 described in described driven by motor accelerate rotation to the first specified rotary speed; Control described motor, make described motor and described impeller simultaneously in free moderating process.

Concrete, the motor that described rotary drum washing machine 20 can be described rotary drum washing machine 20 by control circuit is powered, and then control described external rotor electric machine and accelerate to rotate, drive the impeller rotation of described rotary drum washing machine 20 to the first specified rotary speed, described the first specified rotary speed is predefined, can arrange according to the concrete condition of rotary drum washing machine 20, the embodiment of the present invention does not limit this.Then can also stop powering for described external rotor electric machine by control circuit, now described motor and impeller be simultaneously in free deceleration regime.

Acquiring unit 202, is decelerated to the very first time of the second specified rotary speed for obtaining described impeller from described the first specified rotary speed, described the second specified rotary speed is non-vanishing.

General, acquiring unit 202 can timing when described moderating process starts, and when described impeller stops timing when described the first specified rotary speed is decelerated to the second specified rotary speed, now the time of record is the very first time.

Optionally, the rotary drum washing machine that is external rotor electric machine for motor, the rotary speed of impeller equates with the rotating speed of motor, can determine by the rotating speed of motor the rotary speed of impeller.Example, described motor can configure Hall element, and motor often turns around, 12 pulses of Hall element output, the umber of pulse that then described rotary drum washing machine can be exported by Hall element per second is obtained the rotating speed of motor.Concrete, the first specified rotary speed of supposing impeller is 100 revolutions per seconds, corresponding umber of pulse is 1200 pulses each second, the second specified rotary speed of impeller is 30 revolutions per seconds, corresponding umber of pulse is 360 pulses each second, when the umber of pulse of Hall element output is 1200 of each seconds, the rotary speed of impeller has reached the first specified rotary speed, now timer starts timing and stops as motor power supply, make motor and impeller in deceleration regime, when the umber of pulse of Hall element output is reduced to 360 of each seconds, the rotary speed that represents impeller has reached the second specified rotary speed, timer stops timing, now acquiring unit 202 can be obtained the time that timer records, can obtain the very first time.In practical application, the change frequency of the electromotive force that acquiring unit 202 can also be exported by motor is determined the rotating speed of motor, or lenticular lenses is set on motor, determines the rotating speed of motor by raster count.

Determining unit 203, for according to the described very first time, determines the weight of clothing in described rotary drum washing machine 20.

Because the motor of described rotary drum washing machine 20 is external rotor electric machine, so the impeller of rotary drum washing machine 20 and external rotor electric machine are coaxial rotation, the rotor of external rotor electric machine outside, and the quality of described rotor is larger, make the rotary inertia of external rotor electric machine larger, therefore when driven by motor impeller rotates, the rotary inertia of motor and impeller is also larger, the moderating process of described impeller can continue the long period, is convenient to be decelerated to from the first specified rotary speed by impeller the weight of definite clothing of the very first time of the second specified rotary speed.

Common, the weight of described clothing and the described very first time are inversely proportional to, when the clothing in rotary drum washing machine 20 is more, frictional force between described clothing and impeller is larger, under the impact of described larger frictional force, it is shorter that described impeller is decelerated to the second specified rotary speed very first time used from the first specified rotary speed, when clothing in rotary drum washing machine 20 is less, frictional force between described clothing and impeller is less, under the impact of described less frictional force, it is longer that described impeller is decelerated to the second specified rotary speed very first time used from the first specified rotary speed, so weight and the very first time of the clothing in rotary drum washing machine are inversely proportional to.

Optionally, can be in the control chip of described rotary drum washing machine 20 table corresponding to clothes weight of pre-stored time, the described time from the corresponding table record of clothes weight different time corresponding clothes weight respectively, then according to the very first time, inquire about the time table corresponding to clothes weight prestoring, can determine the weight of the clothing in rotary drum washing machine 20.

So, when the rotary drum washing machine that is external rotor electric machine at motor is weighed to clothing, the motor that first described rotary drum washing machine can be described rotary drum washing machine by control module is powered, and makes the impeller rotation of rotary drum washing machine described in described driven by motor to the first specified rotary speed; After reaching the first specified rotary speed, stop as described motor power supply, make described motor and described impeller simultaneously in free moderating process, then by acquiring unit, obtain described impeller and from described the first specified rotary speed, be decelerated to the very first time of the second specified rotary speed, described the second specified rotary speed is non-vanishing, finally can, according to the described very first time, by determining unit, determine the weight of clothing in described rotary drum washing machine.Compared to prior art, rotary drum washing machine described in the embodiment of the present invention, do not need to experience described impeller and continue to be decelerated to zero process from the first specified rotary speed, only need to obtain described impeller and from the first specified rotary speed, continue to be decelerated to the described very first time of the second specified rotary speed, described the second specified rotary speed is non-vanishing, that is to say that the very first time is less than described impeller and was decelerated to for zero time used from the first specified rotary speed, thereby can save the time that described rotary drum washing machine is determined the weight of washing clothes, and then shorten each time of doing washing.

Further, described rotary drum washing machine 20 can also be controlled described motor by control module 201, and the impeller of rotary drum washing machine 20 described in described driven by motor is continued with described the first specified rotary speed rotation in the first default duration.Example, rotary drum washing machine 20 can also continue as described motor by control module 201 and power, the impeller of rotary drum washing machine described in described driven by motor is continued with described the first specified rotary speed rotation in the first default duration, like this can so that the rotary speed of the impeller of rotary drum washing machine 20 stable maintain the first specified rotary speed, avoided the unstable accuracy that reduces described fuzzy Weighing method of speed due to described impeller.

Example, described acquiring unit 202 also for: obtained for the second time, described the second time is while there is not clothing in described rotary drum washing machine 20, and described impeller is decelerated to described the second specified rotary speed time used from described the first specified rotary speed.

In practical application, before rotary drum washing machine 20 dispatches from the factory, the second time can be pre-stored in the control chip of rotary drum washing machine 20, when 20 pairs of clothings of rotary drum washing machine carry out fuzzy weighing, acquiring unit 202 can directly be obtained for the second time from described control chip.

During initialization, rotary drum washing machine 20 second time of obtaining is specially: while there is not clothing by control module 201 in the wash bucket of described rotary drum washing machine 20, motor power supply for rotary drum washing machine 20, make described in described driven by motor impeller rotation to described the first specified rotary speed, then stop as described motor power supply, make described motor and described impeller simultaneously in free moderating process, by acquiring unit 202, obtain described impeller and be decelerated to described the second specified rotary speed time used as the second time from described the first specified rotary speed.

When rotary drum washing machine longer 20 service times, wear and tear when larger, user also can redeterminate for the second time, obtained the second new time, then with described the second new time, update stored in the second time in control chip, improve the degree of accuracy of the fuzzy Weighing method of rotary drum washing machine 20.

Described determining unit 203 specifically for: according to the difference of the described very first time and described the second time, determine the weight of described clothing; Or according to the ratio of the described very first time and described the second time, determine the weight of described clothing.

Optionally, described according to the difference of the described very first time and described the second time, while determining the weight of described clothing, can be in advance in the control chip of described rotary drum washing machine 20 memory time poor table corresponding to clothes weight, the described time difference from the corresponding table record of clothes weight the different time differences distinguish corresponding clothes weight; Then determining unit 203 can be inquired about the time difference table corresponding to clothes weight prestoring according to the difference of the described very first time and described the second time, can determine the weight of described clothing.

Optionally, described according to the ratio of the described very first time and described the second time, while determining the weight of described clothing, can be in the control chip of described rotary drum washing machine 20 pre-stored time ratio table corresponding to clothes weight, described time ratio from the corresponding table record of clothes weight different time ratio corresponding clothes weight respectively; Then determining unit 203 can be inquired about the time ratio table corresponding to clothes weight prestoring according to the ratio of the described very first time and described the second time, can determine the weight of described clothing.

It is external rotor electric machine rotary drum washing machine that the embodiment of the present invention provides a kind of motor, when clothing is weighed, the motor that can be first described rotary drum washing machine by control module is powered, and makes the impeller rotation of rotary drum washing machine described in described driven by motor to the first specified rotary speed; After reaching the first specified rotary speed, stop as described motor power supply, make described motor and described impeller simultaneously in free moderating process, then by acquiring unit, obtain described impeller and from described the first specified rotary speed, be decelerated to the very first time of the second specified rotary speed, described the second specified rotary speed is non-vanishing, final determining unit can, according to the described very first time, be determined the weight of clothing in described rotary drum washing machine.Or obtain while there is no clothing in rotary drum washing machine, described impeller is decelerated to the second specified rotary speed the second time used from the first specified rotary speed, then determining unit, according to difference or the ratio of the very first time and the second time, is determined the weight of clothing in described rotary drum washing machine.Compared to prior art, rotary drum washing machine described in the embodiment of the present invention, do not need to experience described impeller and continue to be decelerated to zero process from the first specified rotary speed, only need to obtain described impeller and from the first specified rotary speed, continue to be decelerated to the described very first time of the second specified rotary speed, described the second specified rotary speed is non-vanishing, that is to say that the very first time is less than described impeller and was decelerated to for zero time used from the first specified rotary speed, thereby can save the time that described rotary drum washing machine is determined the weight of washing clothes, and then shorten each time of doing washing.Further, because described rotary drum washing machine can also be according to difference or the ratio of the very first time and the second time, determine the weight of clothing in described rotary drum washing machine, can get rid of the impact causing due to rotary drum washing machine factor, improved the accuracy of described fuzzy Weighing method.

The embodiment of the present invention provides a kind of fuzzy Weighing method, and as described in Figure 3, for rotary drum washing machine, the motor of described rotary drum washing machine is inner rotor motor, and described fuzzy Weighing method comprises:

Described in step 301, described driven by motor, the impeller of rotary drum washing machine and wash bucket accelerate rotation to described the 3rd specified rotary speed simultaneously.

Concrete, described rotary drum washing machine can be that described motor is powered by control circuit, and then control inner rotor motor and accelerate to rotate, impeller and the wash bucket of described driven by motor rotary drum washing machine are rotated to the 3rd specified rotary speed simultaneously, described the 3rd specified rotary speed is predefined, can arrange according to the concrete condition of rotary drum washing machine, the embodiment of the present invention does not limit this.

Preferably, at impeller and wash bucket, accelerate rotation to the 3rd specified rotary speed simultaneously, make impeller and wash bucket in the second default duration, continue to rotate with the 3rd specified rotary speed simultaneously, the described second default duration is predefined, in practical application, can arrange according to the concrete condition of rotary drum washing machine, the embodiment of the present invention does not limit this.

Step 302, described motor, described impeller and described wash bucket are simultaneously in free moderating process, obtain described impeller and described wash bucket and from described the 3rd specified rotary speed, be decelerated to the 3rd time of the 4th specified rotary speed simultaneously, described the 4th specified rotary speed is non-vanishing.

The rotary drum washing machine that is inner rotor motor for motor, when described impeller and described wash bucket rotate to the 3rd specified rotary speed simultaneously, described rotary drum washing machine can stop powering for described inner rotor motor by control circuit, now described motor, described impeller and described wash bucket, simultaneously in deceleration regime, then obtain described impeller and described wash bucket and from described the 3rd specified rotary speed, are decelerated to the 3rd time of described the 4th specified rotary speed simultaneously.

Optionally, the rotary drum washing machine that is inner rotor motor for motor, motor drives impeller and wash bucket to rotate by belt transmission simultaneously, and the rotary speed of impeller equates with the rotating speed of motor or be proportional, can determine by the rotating speed of motor the rotary speed of impeller and wash bucket.Example, described motor can configure Hall element, and motor often turns around, 12 pulses of Hall element output, the umber of pulse that then described rotary drum washing machine can be exported by Hall element per second is obtained the rotating speed of motor.Concrete, the rotating speed of supposing motor becomes 1:2 with the rotary speed of impeller and wash bucket, the 3rd specified rotary speed of impeller and wash bucket is 100 revolutions per seconds, corresponding umber of pulse is 600 pulses each second, the 4th specified rotary speed of impeller and wash bucket is 30 revolutions per seconds, corresponding umber of pulse is 180 pulses each second, when the umber of pulse of Hall element output is 600 of each seconds, the rotary speed of impeller and wash bucket has reached the 3rd specified rotary speed, now timer starts timing and stops as motor power supply, make motor and impeller in deceleration regime, when the umber of pulse of Hall element output is reduced to 180 of each seconds, the rotary speed that represents impeller and wash bucket has reached the 4th specified rotary speed, timer stops timing, the time that now timer records was for the 3rd time.In practical application, the change frequency of the electromotive force that rotary drum washing machine can also be exported by motor is determined the rotating speed of motor, or lenticular lenses is set on motor, determines the rotating speed of motor by raster count.

Wherein, described the 4th specified rotary speed is non-vanishing, and described the 4th specified rotary speed is predefined, can arrange according to the concrete condition of rotary drum washing machine, and the embodiment of the present invention does not limit this.

Preferably, the rotary drum washing machine that is inner rotor motor for motor, after described impeller and wash bucket continue with the 3rd specified rotary speed rotation simultaneously in the second default duration, stop, for described motor power supply, then obtaining described impeller and described wash bucket and from described the 3rd specified rotary speed, being decelerated to the 3rd time of described the 4th specified rotary speed simultaneously.

Step 303, according to described the 3rd time, determine the weight of clothing in described rotary drum washing machine.

Because the motor of described rotary drum washing machine is inner rotor motor, so need belt to transmit between the impeller of rotary drum washing machine and inner rotor motor, the rotor of described inner rotor motor is at center, make the rotary inertia of described inner rotor motor less, when inner rotor motor drives the impeller of described rotary drum washing machine to rotate by belt transmission, the rotary inertia of motor and impeller is less, the time that impeller is decelerated to the 4th specified rotary speed from the 3rd specified rotary speed is very short, while there is clothing in described rotary drum washing machine, due to the frictional force impact between clothing and impeller, the time that impeller is decelerated to the 4th specified rotary speed from the 3rd specified rotary speed is shorter, if therefore the motor of rotary drum washing machine is inner rotor motor, when the clothing in rotary drum washing machine carries out fuzzy weighing, can be so that impeller and wash bucket rotate simultaneously, rotary inertia is larger, and clothing can be followed wash bucket and rotated together, centrifugal force during clothing rotation has further increased rotary inertia, extended the deceleration time of described impeller and wash bucket, therefore can from the 3rd specified rotary speed, be decelerated to the weight of definite clothing of the 3rd time of the 4th specified rotary speed by impeller and wash bucket.

When clothing in rotary drum washing machine is more, the rotary inertia of impeller, wash bucket and clothing is larger, and therefore from the 3rd specified rotary speed, to be decelerated to the 4th specified rotary speed the 3rd time used longer for described impeller and wash bucket; When clothing in rotary drum washing machine is less, the rotary inertia of impeller, wash bucket and clothing is less, therefore from the 3rd specified rotary speed, to be decelerated to the 4th specified rotary speed the 3rd time used shorter for described impeller and wash bucket, so the weight of the clothing in rotary drum washing machine was directly proportional to described the 3rd time.

Optionally, can table corresponding to clothes weight of pre-stored time, the described time from the corresponding table record of clothes weight different time corresponding clothes weight respectively, then according to the 3rd time, inquire about the time table corresponding to clothes weight prestoring, can determine the weight of the clothing in rotary drum washing machine.

In practical application, also can be in the control chip of rotary drum washing machine pre-stored acceleration table corresponding to clothes weight, the corresponding table of described acceleration and clothes weight is corresponding different clothes weight corresponding to acceleration, after getting for the 3rd time, can, according to the corresponding relation between time and acceleration, obtain described the second acceleration corresponding to the 3rd time, then according to the second acceleration, inquire about described acceleration table corresponding to clothes weight, can determine the weight of described clothing.

So, at rotary drum washing machine motor, it is external rotor electric machine, and when rotary drum washing machine is weighed to clothing, first described rotary drum washing machine can be that motor is powered by control circuit, and the wash bucket of impeller and described rotary drum washing machine described in described driven by motor is rotated to described the 3rd specified rotary speed simultaneously; After reaching the 3rd specified rotary speed, stop as described motor power supply, make described motor, described impeller and wash bucket simultaneously in free moderating process, obtain described impeller and described wash bucket and from described the 3rd specified rotary speed, be decelerated to the 3rd time of described the 4th specified rotary speed simultaneously, described the 4th specified rotary speed is non-vanishing, finally can, according to described the 3rd time, determine the weight of clothing in described rotary drum washing machine.Compared to prior art, fuzzy Weighing method described in the embodiment of the present invention, do not need to experience described impeller and described wash bucket and from the 3rd specified rotary speed, be decelerated to zero process simultaneously, only need to obtain described impeller and described wash bucket and from the 3rd specified rotary speed, continue to be decelerated to described the 3rd time of the 4th specified rotary speed simultaneously, described the 4th specified rotary speed is non-vanishing, the 3rd time that is to say is less than described impeller and wash bucket, and from the 3rd specified rotary speed, to continue the speed that is decelerated to be zero time used simultaneously, thereby can save the time that described rotary drum washing machine is determined the weight of washing clothes, and then shorten each time of doing washing.

Further, wash bucket at impeller and described rotary drum washing machine described in described driven by motor accelerates rotation to the 3rd specified rotary speed simultaneously, and described motor can also drive described impeller and described wash bucket in the described second default duration, to continue with described the 3rd specified rotary speed rotation simultaneously.Example, rotary drum washing machine can also continue as described motor power supply, impeller and wash bucket described in described driven by motor are continued with described the 3rd specified rotary speed rotation in the second default duration, like this can so that the specified rotary speed of the impeller of rotary drum washing machine and wash bucket stable maintain the 3rd specified rotary speed, avoided the unstable accuracy that reduces described fuzzy Weighing method of speed due to described impeller and wash bucket.

Optionally, described according to described the 3rd time, before determining the weight of clothing in described rotary drum washing machine, described rotary drum washing machine can also obtain for the 4th time, described the 4th time is while there is not clothing in described rotary drum washing machine, and described impeller and described wash bucket are decelerated to described the 4th specified rotary speed time used from described the 3rd specified rotary speed simultaneously; Then can, according to the difference of described the 3rd time and described the 4th time, determine the weight of described clothing; Or according to the ratio of described the 3rd time and described the 4th time, determine the weight of described clothing.In actual applications, if rotary drum washing machine is longer service time, can cause loss comparatively serious, make the frictional force of rotary drum washing machine inside larger, now, if only determine the weight of clothing in rotary drum washing machine by the 3rd time, described the 3rd time can comprise that a part of time being caused by the factor of rotary drum washing machine inside changes, the clothes weight that makes to obtain is greater than the actual weight of clothing, if adopt the difference of described the 3rd time and described the 4th time to determine the weight of clothing, can get rid of the impact causing due to rotary drum washing machine factor.The ratio of described the 3rd time of same employing and described the 4th time, determines the weight of described clothing, also can get rid of the impact causing due to rotary drum washing machine factor.

In practical application, before rotary drum washing machine dispatches from the factory, the 4th time can be pre-stored in the control chip of rotary drum washing machine, when rotary drum washing machine carries out fuzzy weighing to clothing, can directly from described control chip, obtain for the 4th time.

The concrete steps of obtaining for the 4th time during initialization are: while there is not clothing in the wash bucket of described rotary drum washing machine, the motor that described rotary drum washing machine is described rotary drum washing machine by control circuit is powered, impeller and described wash bucket described in described driven by motor are rotated to described the 3rd specified rotary speed simultaneously, then by control circuit, stop powering for described motor, make described motor, described impeller and described wash bucket are simultaneously in free moderating process, obtain described impeller and described wash bucket and from described the 3rd specified rotary speed, be decelerated to described the 4th specified rotary speed time used as the 4th time simultaneously.

Optionally, described according to the difference of described the 3rd time and described the 4th time, while determining the weight of described clothing, can be in advance in the control chip of described rotary drum washing machine memory time poor table corresponding to clothes weight, the described time difference from the corresponding table record of clothes weight the different time differences distinguish corresponding clothes weight; Then can inquire about the time difference table corresponding to clothes weight prestoring according to the difference of described the 3rd time and described the 4th time, can determine the weight of described clothing.

Optionally, described according to the ratio of described the 3rd time and described the 4th time, while determining the weight of described clothing, can be in the control chip of described rotary drum washing machine pre-stored time ratio table corresponding to clothes weight, described time ratio from the corresponding table record of clothes weight different time ratio corresponding clothes weight respectively; Then according to the ratio of described the 3rd time and described the 4th time, inquire about the time ratio table corresponding to clothes weight prestoring, can determine the weight of described clothing.

Optionally, at described motor, described impeller and described wash bucket simultaneously before free moderating process, described rotary drum washing machine can also be opened the spraying of described rotary drum washing machine, clothing in described rotary drum washing machine is sprayed water, continue the 3rd default duration, in order to increase the weight of clothing, and then the rotary inertia of increase impeller and described wash bucket.Because the rotary drum washing machine of inner rotor motor is when weighing to clothing, need impeller and wash bucket to rotate simultaneously, the rotary inertia of described like this impeller and wash bucket is larger, while there is clothing in rotary drum washing machine, in the rotation of impeller and wash bucket in the 3rd specified rotary speed, clothing also can be followed wash bucket rotation to the 3rd specified rotary speed, centrifugal force during clothing rotation has further increased the rotary inertia of impeller and wash bucket, when clothes weight in described rotary drum washing machine is less, by clothing, be that the rotary inertia that increases of impeller and wash bucket is less, therefore from the 3rd specified rotary speed be decelerated to the 4th specified rotary speed the 3rd time used and the 4th lead time little, may be according to the accurate weight of the difference of described the 3rd time and the 4th time or ratio acquisition clothing, so before stopping as motor power supply, described rotary drum washing machine can be opened spraying and continue the 3rd default duration, clothing in described rotary drum washing machine is sprayed water, increase the weight of clothing, and then the rotary inertia of increase impeller and wash bucket, that then obtains impeller and wash bucket is decelerated to the 3rd time of the 4th specified rotary speed from the 3rd specified rotary speed, the difference of described the 3rd time and the 4th time is larger, can determine the weight of described clothing, then rotary drum washing machine is when normal washing, make flooding time shorten the described the 3rd default duration, water consumption while having determined equally described clothes washing.

The fuzzy Weighing method that the embodiment of the present invention provides, when the rotary drum washing machine that is inner rotor motor at motor is weighed to clothing, can by control circuit, be first that described motor is powered, the wash bucket of impeller and described rotary drum washing machine described in described driven by motor is rotated to described the 3rd specified rotary speed simultaneously; After reaching the 3rd specified rotary speed, stop as described motor power supply, make described motor, described impeller and described wash bucket simultaneously in free moderating process, obtain described impeller and described wash bucket and from described the 3rd specified rotary speed, be decelerated to the 3rd time of described the 4th specified rotary speed simultaneously, described the 4th specified rotary speed is non-vanishing, finally can, according to described the 3rd time, determine the weight of clothing in described rotary drum washing machine.Or obtain while there is no clothing in rotary drum washing machine, described impeller and wash bucket are decelerated to the 4th specified rotary speed the 4th time used from the 3rd specified rotary speed simultaneously, then according to difference or the ratio of the 3rd time and the 4th time, determine the weight of clothing in described rotary drum washing machine.Compared to prior art, fuzzy Weighing method described in the embodiment of the present invention, do not need to experience described impeller and described wash bucket and from the 3rd specified rotary speed, be decelerated to zero process simultaneously, only need to obtain described impeller and described wash bucket and from the 3rd specified rotary speed, continue to be decelerated to described the 3rd time of the 4th specified rotary speed simultaneously, described the 4th specified rotary speed is non-vanishing, the 3rd time that is to say is less than described impeller and wash bucket, and from the 3rd specified rotary speed, to continue the speed that is decelerated to be zero time used simultaneously, thereby can save the time that described rotary drum washing machine is determined the weight of washing clothes, and then shorten each time of doing washing.Further, because described rotary drum washing machine can also be according to difference or the ratio of the 3rd time and the 4th time, determine the weight of clothing in described rotary drum washing machine, can get rid of the impact causing due to rotary drum washing machine factor, improved the accuracy of described fuzzy Weighing method.

The embodiment of the present invention provides a kind of rotary drum washing machine 40, and the motor of described rotary drum washing machine 40 is external rotor electric machine, and as shown in Figure 4, described rotary drum washing machine 40 comprises control module 401, acquiring unit 402 and determining unit 403.

Described control module 401 for: control described motor, make the impeller of rotary drum washing machine 40 described in described driven by motor and wash bucket accelerate rotation to the 3rd specified rotary speed simultaneously; Control described motor, make described motor, described impeller and described wash bucket simultaneously in free moderating process.

Concrete, the motor that described rotary drum washing machine 40 can be described rotary drum washing machine 40 by control circuit is powered, and then control described inner rotor motor and accelerate to rotate, drive impeller and the wash bucket of described rotary drum washing machine 40 to rotate to the 3rd specified rotary speed simultaneously, described the 3rd specified rotary speed is predefined, can arrange according to the concrete condition of rotary drum washing machine 40, the embodiment of the present invention does not limit this.Then can also stop powering for described inner rotor motor by control circuit, now described motor, impeller and wash bucket be in free deceleration regime.

Described acquiring unit 402 is decelerated to the 3rd time of the 4th specified rotary speed for obtaining described impeller and described wash bucket simultaneously from described the 3rd specified rotary speed, described the 4th specified rotary speed is non-vanishing.

General, acquiring unit 402 can timing when described moderating process starts, and when described impeller and wash bucket stop timing simultaneously when described the 3rd specified rotary speed is decelerated to the 4th specified rotary speed, now the time of record was for the 3rd time.

Optionally, the rotary drum washing machine that is inner rotor motor for motor, motor drives impeller and wash bucket to rotate by belt transmission simultaneously, and the rotary speed of impeller equates with the rotating speed of motor or be proportional, therefore can determine by the rotating speed of motor the rotary speed of impeller and wash bucket.Example, described motor can configure Hall element, and motor often turns around, 12 pulses of Hall element output, the umber of pulse that then described rotary drum washing machine can be exported by Hall element per second is obtained the rotating speed of motor.Concrete, the rotating speed of supposing motor becomes 1:2 with the rotary speed of impeller and wash bucket, the 3rd specified rotary speed of impeller and wash bucket is 100 revolutions per seconds, corresponding umber of pulse is 600 pulses each second, the 4th specified rotary speed of impeller and wash bucket is 30 revolutions per seconds, corresponding umber of pulse is 180 pulses each second, when the umber of pulse of Hall element output is 600 of each seconds, the rotary speed of impeller and wash bucket has reached the 3rd specified rotary speed, now timer starts timing and stops as motor power supply, make motor and impeller in deceleration regime, when the umber of pulse of Hall element output is reduced to 180 of each seconds, the rotary speed that represents impeller and wash bucket has reached the 4th specified rotary speed, timer stops timing, now rotary drum washing machine 40 can obtain the time that timer records by acquiring unit 402, the time getting was for the 3rd time.In practical application, the change frequency of the electromotive force that acquiring unit 402 can also be exported by motor is determined the rotating speed of motor, or lenticular lenses is set on motor, determines the rotating speed of motor by raster count.

Determining unit 403, for according to described the 3rd time, determines the weight of clothing in described rotary drum washing machine 40.

Because the motor of described rotary drum washing machine 40 is inner rotor motor, so need belt to transmit between the impeller of rotary drum washing machine 40 and inner rotor motor, the rotor of described inner rotor motor is at center, make the rotary inertia of described inner rotor motor less, when inner rotor motor drives the impeller of described rotary drum washing machine 40 to rotate by belt transmission, the rotary inertia of motor and impeller is less, the time that impeller is decelerated to the 4th specified rotary speed from the 3rd specified rotary speed is very short, while there is clothing in described rotary drum washing machine 40, due to the frictional force impact between clothing and impeller, the time that impeller is decelerated to the 4th specified rotary speed from the 3rd specified rotary speed is shorter, if therefore the motor of rotary drum washing machine 40 is inner rotor motor, when the clothing in rotary drum washing machine carries out fuzzy weighing, can be so that impeller and wash bucket rotate simultaneously, rotary inertia is larger, and clothing can be followed wash bucket and rotated together, centrifugal force during clothing rotation has further increased rotary inertia, extended the deceleration time of described impeller and wash bucket, therefore can from the 3rd specified rotary speed, be decelerated to the weight of definite clothing of the 3rd time of the 4th specified rotary speed by impeller and wash bucket.

When clothing in rotary drum washing machine 40 is more, the rotary inertia of impeller, wash bucket and clothing is larger, and therefore from the 3rd specified rotary speed, to be decelerated to the 4th specified rotary speed the 3rd time used longer for described impeller and wash bucket; When clothing in rotary drum washing machine 40 is less, the rotary inertia of impeller, wash bucket and clothing is less, therefore from the 3rd specified rotary speed, to be decelerated to the 4th specified rotary speed the 3rd time used shorter for described impeller and wash bucket, so the weight of the clothing in rotary drum washing machine 40 was directly proportional to the described very first time.

Optionally, can be in the control chip of described rotary drum washing machine 40 table corresponding to clothes weight of pre-stored time, the described time from the corresponding table record of clothes weight different time corresponding clothes weight respectively, then according to the 3rd time, inquire about the time table corresponding to clothes weight prestoring, can determine the weight of the clothing in rotary drum washing machine 40.

So, at rotary drum washing machine motor, it is external rotor electric machine, and when rotary drum washing machine is weighed to clothing, first described rotary drum washing machine can be that motor is powered by control module, and the wash bucket of impeller and described rotary drum washing machine described in described driven by motor is rotated to described the 3rd specified rotary speed simultaneously; After reaching the 3rd specified rotary speed, stop as described motor power supply, make described motor, described impeller and wash bucket simultaneously in free moderating process, then by acquiring unit, obtain described impeller and described wash bucket and from described the 3rd specified rotary speed, be decelerated to the 3rd time of described the 4th specified rotary speed simultaneously, described the 4th specified rotary speed is non-vanishing, finally can, by determining unit according to described the 3rd time, determine the weight of clothing in described rotary drum washing machine.Compared to prior art, rotary drum washing machine described in the embodiment of the present invention, do not need to experience described impeller and described wash bucket and from the 3rd specified rotary speed, be decelerated to zero process simultaneously, only need to obtain described impeller and described wash bucket and from the 3rd specified rotary speed, continue to be decelerated to described the 3rd time of the 4th specified rotary speed simultaneously, described the 4th specified rotary speed is non-vanishing, the 3rd time that is to say is less than described impeller and wash bucket, and from the 3rd specified rotary speed, to continue the speed that is decelerated to be zero time used simultaneously, thereby can save the time that described rotary drum washing machine is determined the weight of washing clothes, and then shorten each time of doing washing.

Further, rotary drum washing machine 40 can also be controlled described motor by described control module 401, makes impeller described in described driven by motor in the described second default duration, continue to rotate with described the 3rd specified rotary speed with described wash bucket simultaneously.Example, rotary drum washing machine 40 can also continue as described motor by control module 401 and power, impeller and wash bucket described in described driven by motor are continued with described the 3rd specified rotary speed rotation in the second default duration, like this can so that the specified rotary speed of the impeller of rotary drum washing machine and wash bucket stable maintain the 3rd specified rotary speed, avoided the unstable accuracy that reduces described fuzzy Weighing method of speed due to described impeller and wash bucket.

Example, described acquiring unit 402 also for: obtained for the 4th time, described the 4th time is while there is not clothing in described rotary drum washing machine 40, and described impeller and described wash bucket are decelerated to described the 4th specified rotary speed time used from described the 3rd specified rotary speed simultaneously.

In practical application, before rotary drum washing machine 40 dispatches from the factory, the 4th time can be pre-stored in the control chip of rotary drum washing machine 40, when 40 pairs of clothings of rotary drum washing machine carry out fuzzy weighing, can directly from described control chip, obtain for the 4th time.

The concrete steps of obtaining for the 4th time during initialization are: while there is not clothing in the wash bucket of described rotary drum washing machine 40, the motor that described rotary drum washing machine 40 is described rotary drum washing machine 40 by control circuit is powered, impeller and described wash bucket described in described driven by motor are rotated to described the 3rd specified rotary speed simultaneously, then by control circuit, stop powering for described motor, make described motor, described impeller and described wash bucket are simultaneously in free moderating process, obtain described impeller and described wash bucket and from described the 3rd specified rotary speed, be decelerated to described the 4th specified rotary speed time used as the 4th time simultaneously.

Described determining unit 403 specifically for: according to the difference of described the 3rd time and described the 4th time, determine the weight of described clothing; Or according to the ratio of described the 3rd time and described the 4th time, determine the weight of described clothing.

Optionally, described according to the difference of described the 3rd time and described the 4th time, while determining the weight of described clothing, can be in advance in the control chip of described rotary drum washing machine 40 memory time poor table corresponding to clothes weight, the described time difference from the corresponding table record of clothes weight the different time differences distinguish corresponding clothes weight; Then can inquire about the time difference table corresponding to clothes weight prestoring according to the difference of described the 3rd time and described the 4th time, can determine the weight of described clothing.

Optionally, described according to the ratio of described the 3rd time and described the 4th time, while determining the weight of described clothing, can be in the control chip of described rotary drum washing machine 40 pre-stored time ratio table corresponding to clothes weight, described time ratio from the corresponding table record of clothes weight different time ratio corresponding clothes weight respectively; Then according to the ratio of described the 3rd time and described the 4th time, inquire about the time ratio table corresponding to clothes weight prestoring, can determine the weight of described clothing.

Optionally, as shown in Figure 5, described rotary drum washing machine 40 also comprises water spray unit 404, and described water spray unit 404, for the clothing water spray to described rotary drum washing machine 40, continues the 3rd default duration, to increase the rotary inertia of impeller and described wash bucket.Because the rotary drum washing machine 40 of inner rotor motor is when weighing to clothing, need impeller and wash bucket to rotate simultaneously, the rotary inertia of described like this impeller and wash bucket is larger, while there is clothing in rotary drum washing machine 40, in the rotation of impeller and wash bucket in the 3rd specified rotary speed, clothing also can be followed wash bucket rotation to the 3rd specified rotary speed, centrifugal force during clothing rotation has further increased the rotary inertia of impeller and wash bucket, if the clothes weight in described rotary drum washing machine 40 is less, the impeller of centrifugal force increase and the rotary inertia of wash bucket by clothing are less, therefore from the 3rd specified rotary speed, be decelerated to the gap of the 4th specified rotary speed the 3rd time used and the 4th time little, cannot be by difference or the ratio of the 3rd time and the 4th time, determine the accurate weight of clothing, so before stopping as motor power supply, described rotary drum washing machine 40 can be opened spraying and continue the 3rd default duration, clothing in described rotary drum washing machine 40 is sprayed water, increase the weight of clothing, and then the rotary inertia of increase impeller and wash bucket, that then obtains impeller and wash bucket is decelerated to the 3rd time of the 4th specified rotary speed from the 3rd specified rotary speed, described the 3rd time is larger, also larger with the difference of the 4th time, can determine the weight of described clothing, then rotary drum washing machine is when normal washing, make flooding time shorten the described the 3rd default duration, water consumption while having determined equally described clothes washing.

It is the rotary drum washing machine of inner rotor motor that the embodiment of the present invention provides a kind of motor, when clothing is weighed, can by control module, be first that described motor is powered, the wash bucket of impeller and described rotary drum washing machine described in described driven by motor is rotated to described the 3rd specified rotary speed simultaneously; After reaching the 3rd specified rotary speed, stop as described motor power supply, make described motor, described impeller and described wash bucket simultaneously in free moderating process, then by acquiring unit, obtain described impeller and described wash bucket and from described the 3rd specified rotary speed, be decelerated to the 3rd time of described the 4th specified rotary speed simultaneously, described the 4th specified rotary speed is non-vanishing, finally can, by determining unit according to described the 3rd time, determine the weight of clothing in described rotary drum washing machine.Or obtain while there is no clothing in rotary drum washing machine by acquiring unit, described impeller and wash bucket are decelerated to the 4th specified rotary speed the 4th time used from the 3rd specified rotary speed simultaneously, then by determining unit according to difference or the ratio of the 3rd time and the 4th time, determine the weight of clothing in described rotary drum washing machine.Compared to prior art, rotary drum washing machine described in the embodiment of the present invention, do not need to experience described impeller and described wash bucket and from the 3rd specified rotary speed, be decelerated to zero process simultaneously, only need to obtain described impeller and described wash bucket and from the 3rd specified rotary speed, continue to be decelerated to described the 3rd time of the 4th specified rotary speed simultaneously, described the 4th specified rotary speed is non-vanishing, the 3rd time that is to say is less than described impeller and wash bucket, and from the 3rd specified rotary speed, to continue the speed that is decelerated to be zero time used simultaneously, thereby can save the time that described rotary drum washing machine is determined the weight of washing clothes, and then shorten each time of doing washing.Further, because described rotary drum washing machine can also be according to difference or the ratio of the 3rd time and the 4th time, determine the weight of clothing in described rotary drum washing machine, can get rid of the impact causing due to rotary drum washing machine factor, improved the accuracy of described fuzzy Weighing method.

The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.

Claims

1. a fuzzy Weighing method, is characterized in that, for rotary drum washing machine, the motor of described rotary drum washing machine is external rotor electric machine, and described fuzzy Weighing method comprises:

2. fuzzy Weighing method according to claim 1, is characterized in that, in the impeller acceleration of rotary drum washing machine described in described driven by motor, rotates to the first specified rotary speed, and described method also comprises:

3. fuzzy Weighing method according to claim 1 and 2, is characterized in that, described, according to the described very first time, before determining the weight of clothing in described rotary drum washing machine, described method also comprises:

4. a rotary drum washing machine, the motor of described rotary drum washing machine is external rotor electric machine, it is characterized in that,

Described rotary drum washing machine comprises control module, and described control module is used for:

5. rotary drum washing machine according to claim 4, is characterized in that,

Described control module also for:

6. according to the rotary drum washing machine described in claim 4 or 5, it is characterized in that,

Described acquiring unit also for:

Described determining unit specifically for:

7. a fuzzy Weighing method, is characterized in that, for rotary drum washing machine, the motor of described rotary drum washing machine is inner rotor motor, and described fuzzy Weighing method comprises:

8. fuzzy Weighing method according to claim 7, is characterized in that, at the impeller of rotary drum washing machine described in described driven by motor and wash bucket, accelerates rotation to the 3rd specified rotary speed simultaneously, and described method also comprises:

9. according to the fuzzy Weighing method described in claim 7 or 8, it is characterized in that, described, according to described the 3rd time, before determining the weight of clothing in described rotary drum washing machine, described method also comprises:

10. according to the fuzzy Weighing method described in claim 7 to 9 any one claim, it is characterized in that, in described motor, described impeller and described wash bucket while, before free moderating process, described method also comprises:

11. 1 kinds of rotary drum washing machines, the motor of described rotary drum washing machine is inner rotor motor, it is characterized in that,

12. rotary drum washing machines according to claim 11, is characterized in that,

Described control module also for:

13. according to the rotary drum washing machine described in claim 11 or 12, it is characterized in that,

Described acquiring unit also for:

Described determining unit specifically for:

14. according to claim 11 to the rotary drum washing machine described in 13 any one claims, it is characterized in that, described rotary drum washing machine also comprises water spray unit, for the clothing water spray to described rotary drum washing machine, continues the 3rd default duration.