CN110079971B - Power determination method and device, power consumption detection method and device and washing machine - Google Patents
Power determination method and device, power consumption detection method and device and washing machine Download PDFInfo
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- CN110079971B CN110079971B CN201910305689.1A CN201910305689A CN110079971B CN 110079971 B CN110079971 B CN 110079971B CN 201910305689 A CN201910305689 A CN 201910305689A CN 110079971 B CN110079971 B CN 110079971B
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F33/00—Control of operations performed in washing machines or washer-dryers
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/08—Arrangements for measuring electric power or power factor by using galvanomagnetic-effect devices, e.g. Hall-effect devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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Abstract
The application provides a power determining method, a power determining device, a power consumption detecting method, a power consumption detecting device and a washing machine, and particularly relates to a motor power determining method, a motor power determining device, a washing machine power consumption detecting method, a washing machine power consumption detecting device and a washing machine, wherein the motor power determining method comprises the following steps: obtaining the magnetic induction intensity B in the motor, the length L of a coil cutting magnetic induction line in the motor, the rotating radius R of a motor coil, the rotating speed N of the motor and the resistance R of the motorResistance (RC)As reference data; the power P of the motor is determined according to the reference data and the electromagnetic induction law, the power of the motor can be accurately determined as long as the model and the rotating speed of the motor are given in the method provided by the application, the power consumption of the motor is further accurately determined, external parameters such as clothes load or washing water consumption do not need to be obtained when the power consumption of the washing machine is calculated, error sources are reduced, the process of correcting rated power is not involved, and the detection precision of the actual power of the motor is further improved.
Description
Technical Field
The application relates to the field of washing machines, in particular to a power determining method, a power determining device, a power consumption detecting method, a power consumption detecting device and a washing machine, and particularly relates to a motor power determining method, a motor power determining device, a washing machine power consumption detecting method, a motor power consumption detecting device and a washing machine.
Background
In the prior art, the power consumption of a washing machine can only be measured in a laboratory environment, the power consumption of a household washing machine cannot be detected in one washing cycle, although rated power is provided for the washing machine, the power of the washing machine in actual operation is not consistent with the rated power, and a user cannot know the specific power consumption of the washing machine actually and cannot know the power consumption of each stage in the washing cycle.
The power consumption of the washing machine in the washing period is mainly used for driving the motor to rotate, and when the washing water needs to be heated in the main washing stage of the washing period, the power consumption is mainly used for driving the motor to rotate and heating the water temperature. Therefore, the power consumption of the washing machine can be determined as long as the power consumption of the motor and the power consumption of the heating water temperature in the heating process can be accurately determined.
In the prior art, the power consumption of the motor is usually determined by the rated power, but actually, the power consumption of the motor is different from the rated power, so that a user cannot accurately know the specific power consumption, and CN107761307A proposes a power consumption control detection method for a washing machine, in which the rated power of the motor is corrected by the load of clothes, but on one hand, the detection of the load of clothes itself brings errors, and on the other hand, a plurality of auxiliary parameters are introduced in the process of correcting the rated power, and the calculation process of the auxiliary parameters also brings errors, so that the calculation accuracy is insufficient.
Therefore, it is an urgent need in the art to accurately identify the power consumption of the motor and further accurately determine the power consumption of the washing machine in the washing cycle.
Disclosure of Invention
The application provides a motor power determination method and device, a washing machine power consumption detection method and device and a washing machine, which are used for accurately identifying the power consumption of a motor and further accurately determining the power consumption of the washing machine in a washing cycle.
In order to solve the above-mentioned problems, as an aspect of the present application, there is provided a motor power determining method including:
obtaining the magnetic induction intensity B in the motor, the length L of a coil cutting magnetic induction line in the motor, the rotating radius R of a motor coil, the rotating speed N of the motor and the resistance R of the motorResistance (RC)As reference data;
and determining the power P of the motor according to the electromagnetic induction law according to the reference data.
Optionally, determining the power P of the motor according to the law of electromagnetic induction based on the reference data includes:
determining the power P of the motor by adopting the following formula:
the application also provides a washing machine power consumption detection method for determining the washing machine power consumption in a washing cycle, wherein the washing cycle comprises a main washing stage, a rinsing stage and a dewatering stage, and the method comprises the following steps:
when the heating process for heating the washing water is not included in the main washing stage, acquiring the power consumption of a motor in a washing period, or acquiring the sum of the power consumption of the motor in the washing period and the power consumption of an auxiliary device as the power consumption of the washing machine in the washing period;
when the main washing stage comprises a heating process, acquiring the sum of the power consumption of a motor in a washing period and the power consumption in the heating process, or acquiring the sum of the power consumption of the motor in the washing period, the power consumption in the heating process and the power consumption of an auxiliary device as the power consumption of the washing machine in the washing period;
the method comprises the steps of determining the running power P1 of the motor in the main washing stage by adopting any one determination method provided by the application, and determining the power consumption W of the motor in the main washing stage according to the running time t1 of the motor in the main washing stage and the P1Main washing；
And/or determining the power P2 of the motor in the rinsing stage by adopting any determination method provided by the application, and determining the power consumption W of the motor in the rinsing stage according to the power P2 and the running time t2 of the motor in the rinsing stageRinsing。
Optionally, the operation time period t1 of the motor in the main washing stage is tMain washing*kMain washing/(1+kMain washing)
Wherein, tMain washingIs the total duration of the main wash stage, kMain washingThe motor rotation-stop ratio is in the main washing stage;
and/or the operation time t2 of the rinsing phase motor is tRinsing*kRinsing/(1+kRinsing)
Wherein, tRinsingIs the total duration of the rinsing phase, kRinsingThe motor rotation-stop ratio in the rinsing stage.
Optionally, the motor rotation-stop ratios in the main washing stage and the rinsing stage are the same;
and/or the rotation speed of the motor in the main washing stage and the rinsing stage is the same.
Optionally, acquiring the power consumption W of the motor in the dehydration stageDewateringThe method comprises the following steps:
obtaining the product of the power consumption of the motor and the dehydration times of a single dehydration process in the dehydration stage as the power consumption W of the motor in the dehydration stageDewatering。
Optionally, the power consumption of the motor in the single dehydration process in the dehydration stage is 0.04 kw.h.
Optionally, when the main washing stage includes a heating process, the heating process power consumption W is obtainedHeating ofThe method comprises the following steps:
acquiring the water inlet volume V of a main washing stage and the temperature difference delta t of water in the washing machine before and after heating;
the following formula is adopted to determine the power consumption of the motor in the heating stage:
Wheating of＝ρ*V*cp*Δt
Or acquiring the water inlet quality m of the main washing stageWater (W)The temperature difference delta t of the water in the washing machine before and after heating;
the following formula is adopted to determine the power consumption of the motor in the heating stage:
Wheating of＝mWater (W)*cp*Δt
Where ρ is the density of water, cpIs the specific heat capacity of water.
Optionally, the method further includes: and sending one or more of the power consumption of the washing machine in the washing cycle, the power consumption of the motor in the main washing stage, the power consumption of the motor in the rinsing stage, the power consumption of the motor in the dehydration stage, the power consumption of the auxiliary device and the power consumption of the heating process to a pre-bound terminal.
Optionally, the auxiliary device power consumption in the laundry cycle includes: the power consumption of the display panel and/or the power consumption of the drain pump.
The present application further provides a motor power determination apparatus, comprising:
a parameter acquisition unit for acquiring the magnetic induction intensity B in the motor, the length L of the coil cutting magnetic induction line in the motor,Radius of rotation R of motor coil, rotational speed N of motor and resistance R of motorResistance (RC)As reference data;
and the power calculation unit is used for determining the power P of the motor according to the reference data and the electromagnetic induction law.
Optionally, the determining, by the power calculating unit, the power P of the motor according to the law of electromagnetic induction based on the reference data includes:
determining the power P of the motor by adopting the following formula:
the application also provides a washing machine power consumption detection device for confirm the washing machine power consumption in the laundry cycle, the laundry cycle includes main wash stage, rinsing stage and dehydration stage, includes: an electric quantity detection unit;
the electric quantity detection unit is used for acquiring the power consumption of a motor in a washing period or acquiring the sum of the power consumption of the motor in the washing period and the power consumption of the auxiliary device as the power consumption of the washing machine in the washing period when the heating process for heating the washing water is not included in the main washing stage;
the electric quantity detection unit is also used for acquiring the sum of the power consumption of the motor in the washing period and the power consumption in the heating process or acquiring the sum of the power consumption of the motor in the washing period, the power consumption in the heating process and the power consumption of the auxiliary device as the power consumption of the washing machine in the washing period when the main washing stage comprises the heating process;
wherein the electric quantity detection unit determines the operation power P1 of the motor in the main washing stage by using the determination device of any one of claims 11 to 12, and determines the electric power consumption W of the motor in the main washing stage according to P1 and the operation time t1 of the motor in the main washing stageMain washing；
And/or the power detection unit determines the power P2 of the motor in the rinsing stage by using the determination device of any one of claims 11 to 12 and determines the power W of the motor in the rinsing stage according to P2 and the operation time t2 of the motor in the rinsing stageRinsing。
Optionally, the operation time period t1 of the motor in the main washing stage is tMain washing*kMain washing/(1+kMain washing)
Wherein, tMain washingIs the total duration of the main wash stage, kMain washingThe motor rotation-stop ratio is in the main washing stage;
and/or the operation time t2 of the rinsing phase motor is tRinsing*kRinsing/(1+kRinsing)
Wherein, tRinsingFor the total duration of the rinsing phase, kRinsingThe motor rotation-stop ratio in the rinsing stage.
Optionally, the motor rotation-stop ratios in the main washing stage and the rinsing stage are the same;
and/or the rotation speed of the motor in the main washing stage and the rinsing stage is the same.
Optionally, the electric quantity detection unit obtains the electric power consumption W of the motor in the dehydration stageDewateringThe method comprises the following steps:
obtaining the product of the power consumption of the motor and the dehydration times of a single dehydration process in the dehydration stage as the power consumption W of the motor in the dehydration stageDewatering。
Optionally, the power consumption of the motor in the single dehydration process in the dehydration stage is 0.04 kw.h.
Optionally, when the main washing stage includes a heating process, the electric quantity detection unit obtains the electric power consumption W of the heating process to heat, including:
acquiring the water inlet volume V of a main washing stage and the temperature difference delta t of water in the washing machine before and after heating;
the following formula is adopted to determine the power consumption of the motor in the heating stage:
Wheating of＝ρ*V*cp*Δt
Or acquiring the water inlet quality m of the main washing stageWater (W)The temperature difference delta t of the water in the washing machine before and after heating;
the following formula is adopted to determine the power consumption of the motor in the heating stage:
Wheating of＝mWater (W)*cp*Δt
Where ρ is the density of water, cpIs the specific heat capacity of water.
Optionally, the method further includes: an information transmitting unit;
the information sending unit is used for sending one or more of the power consumption of the washing machine in the washing cycle, the power consumption of the motor in the main washing stage, the power consumption of the motor in the rinsing stage, the power consumption of the motor in the dewatering stage, the power consumption of the auxiliary device and the power consumption of the heating process to the pre-bound terminal.
Optionally, the auxiliary device power consumption in the laundry cycle includes: the power consumption of the display panel and/or the power consumption of the drain pump.
The application also provides a washing machine, which is characterized by comprising the motor power determining device or the washing machine power consumption detecting device.
The application provides a motor power determination method and device, a washing machine power consumption detection method and device, and a washing machine, so that the power of a motor can be accurately determined as long as the model and the rotating speed of the motor are given, the power consumption of the motor is further accurately determined, external parameters such as clothes load or washing water consumption do not need to be obtained when the power consumption of the washing machine is calculated, error sources are reduced, the process of correcting rated power is not involved, and the detection precision of the actual power of the motor is further improved.
Drawings
FIG. 1 is a flow chart of a method for determining motor power in an embodiment of the present application;
fig. 2 is a block diagram of a motor power determining apparatus according to an embodiment of the present application;
fig. 3 is a block diagram of a power consumption detecting apparatus for a washing machine according to an embodiment of the present disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or article that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or article.
In the prior art, the rated power of the motor is usually used as the actual power of the motor, but the rated power of the motor is actually related to the use condition of the motor, for example, the actual power of the motor is different from the rated power when the motor operates at a rotating speed different from the rated rotating speed, when determining the power consumption of the washing machine in a washing cycle, the problem mainly faced is how to accurately determine the power consumption of the motor, and in the prior art, when determining the power consumption of the motor, the rated power often needs to be corrected by means of external parameters, for example, the rated power is corrected by the load of clothes or the water consumption of the washing cycle, and the measurement of the parameters brings errors, so that the calculation result of the power consumption is inaccurate and the errors are large.
In order to accurately detect the actual power consumption of the motor and further ensure accurate detection of the power consumption of the washing machine in the washing cycle, please refer to fig. 1, the present application provides a method for determining the power of the motor, which includes:
s11: obtaining the magnetic induction intensity B in the motor, the length L of a coil cutting magnetic induction line in the motor, the rotating radius R of a motor coil, the rotating speed N of the motor and the resistance R of the motorResistance (RC)As reference data;
s12: and determining the power P of the motor according to the electromagnetic induction law according to the reference data.
It is to be noted that, for the existing motor, B, L, R and R in the above reference data are given as long as the model of the motor is givenResistance (RC)The reference data can be determined according to the model of the motor, the reference data does not need to be measured actually, and the reference data can be determined directly according to the model of the motor, so that only the rotating speed of the motor needs to be determined actually in the reference data, and in the practical application, the rotating speed of the motor is set by a user when the motor is used, namely the rotating speed of the motor can be determined according to the setting of the user, so that the reference data can be obtained easily, and B, L, R, R in the reference data are determined easilyResistance (RC)And the precision of the reference data acquisition process does not actually relate to any process for artificially detecting external parameters, compared with the method for correcting the rated power of the motor by using the clothes load in CN107761307A, the method does not need to detect the quality of the clothes load, thereby reducing error sources, and on the other hand, does not relate to the process for correcting the rated power, thereby further improving the detection precision of the actual power of the motor.
Optionally, determining the power P of the motor according to the law of electromagnetic induction based on the reference data includes:
determining the power P of the motor by adopting the following formula:
specifically, wherein, B, L, R and RResistance (RC)The units in the above formula are international standard units, tesla, meter and ohm respectively, and the unit of N is revolutions per minute. The derivation of the above equation is as follows: the rotation speed of the motor in the operation process is a fixed value, the power P of the motor is equal to the product of the output force F of the motor and the linear speed V, namely P is F V, according to the law of electromagnetic induction, in the process of stable operation of the motor, the input force and the output force of the motor are the same, the input force is equal to I B L, wherein I is the current on a motor coil, wherein I is equal to the voltage and a resistor RResistance (RC)The quotient of (a) is voltage equal to B L Vsin θ according to the law of electromagnetic induction, θ is the angle between linear velocity V and magnetic induction B, so F is equal to B2L2Vsinθ/RResistance (RC)Based on the relationship between the rotation speed V and the rotation speed N of the motor (N is the number of revolutions per minute in unit time), V2 pi rN/60 pi rN/30 is known and is substituted into P F V to obtain
Wherein, because the coil of the motor (especially the motor of the washing machine) is perpendicular to the magnetic induction line when being designed, the motor uses the ring-shaped magnet block, the magnetic field line is in a circle shape, so the coil is always perpendicular to the magnetic field line in the process of rotating, theta is equal to 90 degrees, thereby obtaining the motor
Note that, in the above formula, the unit of N is revolutions per minute (rpm), and when the unit of N is revolutions per second, the following formula needs to be obtained by correspondingly performing unit conversion:
in the application, the condition of the motor when acting is analyzed by adopting the electromagnetic induction law, and then a calculation formula for calculating power is provided, the actual power of the motor when running can be obtained by adopting the formula and combining the running time calculation of the motor, B, L, R and R resistance in the formula are fixed parameters related to the motor, and the fixed parameters can be obtained after the model of the motor is determined, so that the actual power of the motor can be known only by determining the numerical value of N, the whole process does not need to introduce external parameters for correction, the calculated power precision is higher, particularly, the actual running power of the motor can be directly obtained when the rotating speed N is different from the rated rotating speed, and the actual power consumption of the motor is further obtained.
The application also provides a washing machine power consumption detection method, which is used for determining the washing machine power consumption in a washing cycle, wherein the washing cycle comprises a main washing stage, a rinsing stage and a dewatering stage.
The application provides a washing machine power consumption detection method, including:
and when the heating process for heating the washing water is not included in the main washing stage, acquiring the power consumption of the motor in the washing period, or acquiring the sum of the power consumption of the motor in the washing period and the power consumption of the auxiliary device as the power consumption of the washing machine in the washing period.
Specifically, when the washing water in the main washing stage is not required to be heated, the power consumption of the washing machine in the washing cycle is mainly the power consumption of the motor, the auxiliary devices are the display panel and the drainage pump, compared with the power consumption of the motor, the power consumption of the display panel and the power consumption of the drainage pump are negligible, the power consumption of the motor in the washing cycle is directly used as the power consumption of the motor, when the power consumption of the washing machine needs to be further accurately calculated, the sum of the power consumption of the motor and the auxiliary devices can be used as the power consumption of the washing machine, and the power consumption of the washing machine in the washing cycle is obtained and comprises the power consumption of the motor in the main washing stage, the.
When the main washing stage comprises a heating process, acquiring the sum of the power consumption of the motor in the washing period and the power consumption in the heating process, or acquiring the sum of the power consumption of the motor in the washing period, the power consumption in the heating process and the power consumption of the auxiliary device, and using the sum as the power consumption of the washing machine in the washing period.
Specifically, in the heating process, the washing machine heats the water in the main washing stage to a preset temperature through the heating device, the water consumption in the main washing stage is large, and therefore when the main washing stage comprises the heating process, the power consumption in the heating process cannot be ignored, and the power consumption in the heating process should be acquired.
Specifically, in the present application, the motor power determination method provided by any one of the present applications is adopted to determine the motor operating power P1 in the main washing stage, and the main washing stage is determined according to the operating time length t1 of the motor P1 and the main washing stageWashing stage motor power consumption WMain washing(ii) a And/or determining the power P2 of the motor in the rinsing stage by adopting any one of the motor power determination methods provided by the application, and determining the power consumption W of the motor in the rinsing stage according to the power P2 and the running time t2 of the motor in the rinsing stageRinsing。
When the main washing stage does not comprise a heating process and the power consumption of the motor in the main washing stage and/or the rinsing stage is determined, the motor power determining method provided by the application is adopted to determine the running power of the motor, because the model of the washing machine can be known by a user, B, L, R and R in the reference data can be determined according to the model of the washing machineResistance (RC)Therefore, in practice, only the rotating speed of the motor in the operation process needs to be determined, and then the operation time of the motor in each stage is combined, the method provided by the application can be used for determining the power consumption of the motor in the main washing stage and/or the rinsing stage, on one hand, external parameters (such as the load of clothes or the water consumption added into the washing machine) are not required to be introduced to correct the rated power in the application, so that the calculation precision is ensured, on the other hand, the operation time of the motor in the main washing stage and the rinsing stage is set by a user and can be directly obtained, the obtaining difficulty is reduced, and the user can simply and accurately determine the power consumption of the washing machine in the whole washing period.
In some alternative embodiments, the main wash phase motor is operated for a time period t1 ═ tMain washing*kMain washing/(1+kMain washing)
Wherein, tMain washingIs the total duration of the main wash stage, kMain washingThe motor rotation-stop ratio is in the main washing stage;
and/or the operating time t2 of the rinsing phase motor is tRinsing*kRinsing/(1+kRinsing)
Wherein, tRinsingFor the total duration of the rinsing phase, kRinsingThe motor rotation-stop ratio in the rinsing stage.
In practical situations, the drum washing machine is usually installed normally and then rotates reversely, and the drum rotates when the normal rotation and the reverse rotation are alternated, that is, the motor does not rotate all the time in the main washing stage and the rinsing stage, so that it is not appropriate to directly calculate the power consumption of the corresponding stage by using the total duration of the main washing stage or the total duration of the rinsing stage, and a rotation-stop ratio is considered, wherein the rotation-stop ratio is the ratio of the duration of the rotation time to the duration of the rotation stop, for example, when the rotation-stop ratio of the main washing stage is 4:1, the motor is operated in rotation in 80% of the time of the main washing stage.
In some alternative embodiments, the motor spin-stop ratios of the main wash phase and the rinse phase are the same; and/or the rotation speed of the motor in the main washing stage and the rinsing stage is the same.
Specifically, when the rotation/stop ratio k of the motor is the same in the main washing stage and the rinsing stage (preferably, the rotation/stop ratio is 4:1), and the rotation speeds of the motor are the same in the main washing stage and the rinsing stage, the following formula can be used to calculate the power consumption of the motor in the main washing stage and the rinsing stage for simplifying the operation:
wherein: t is tMain washing and rinsingThe total time length of the main washing stage and the rinsing stage is second, the unit of N is revolution per minute, WMain washing+WRinsingIn units of joules.
In some optional embodiments, in the method for detecting power consumption of a washing machine provided by the present application, the power consumption W of the motor in the dehydration stage is obtainedDewateringThe method comprises the following steps: obtaining the product of the power consumption of the motor and the dehydration times of a single dehydration process in the dehydration stage as the power consumption W of the motor in the dehydration stageDewatering。
Through a large number of tests, the inventor of the application verifies that the dehydration process curves of the washing machine are approximate and have small difference with each other for different load quantities, and the energy consumed by the motor in one dehydration process finally tends to a fixed value. The dewatering rotating speed of most washing machines on the market is between 1000rmp-1100rpm, and the inventor finds that the power consumption of the motor of the washing machine in the range of the rotating speed in the single dewatering process in the dewatering stage is 0.04KW. Therefore, the power consumption W of the motor in the dehydration stageDewateringDehydration number (kw.h) 0.04.
In some optional embodiments, when the main washing stage includes a heating process, obtaining a heating process power consumption watherm includes:
acquiring the water inlet volume V of a main washing stage and the temperature difference delta t of water in the washing machine before and after heating;
the following formula is adopted to determine the power consumption of the motor in the heating stage:
Wheating of＝ρ*V*cp*Δt
Or acquiring the water inlet quality m of the main washing stageWater (W)The temperature difference delta t of the water in the washing machine before and after heating;
the following formula is adopted to determine the power consumption of the motor in the heating stage:
Wheating of＝mWater (W)*cp*Δt
Where ρ is the density of water, cpIs the specific heat capacity of water.
Specifically, in the heating process, the water temperature in the washing machine barrel is gradually increased to the water temperature set by a user or preset by the washing machine, the whole process does not involve work on the outside, so all electric energy is converted into heat energy, according to the first law of thermodynamics, the heat absorbed by the water temperature increase is equal to the power consumption in the heating process, and the heat absorbed by the water temperature increase is equal to the mass of water multiplied by the specific heat capacity multiplied by the temperature difference. Wherein the specific heat capacity of water is 4.187KJ/(Kg DEG C), and the density of water is 1g/cm3For convenience of calculation, the amount of power consumed in the heating phase obtained after conversion of joules to kilowatt-hours is WHeating of＝0.00116*V*△t(KW.h)。
As can be seen from the above, in the present application, when the washing water needs to be heated in the main washing stage, and the rotation/stop ratio and the motor rotation speed in the main washing stage and the rinsing stage are the same, the power consumption of the washing machine in the washing cycle is as follows
Wherein the unit of N is rpm, tMain washing and rinsingIn hours and in kilowatt-hours, the washing machine consumes electricity.
In some optional embodiments, the method for detecting power consumption of a washing machine provided by the present application further includes: and sending one or more of the power consumption of the washing machine in the washing cycle, the power consumption of the motor in the main washing stage, the power consumption of the motor in the rinsing stage, the power consumption of the motor in the dehydration stage, the power consumption of the auxiliary device and the power consumption of the heating process to a pre-bound terminal.
In this application, the terminal of binding in advance can be user's cell-phone, when detecting the power consumption of washing machine in the laundry period each time, send washing machine power consumption to user's cell-phone, specifically, can send stage by stage, send the terminal of binding in advance with heating process power consumption after the heating process finishes, send main washing stage motor power consumption to the terminal of binding in advance after the main washing stage finishes, send rinsing stage motor power consumption to the terminal of binding in advance after the rinsing stage finishes, send the terminal of binding in advance with the power consumption of dehydration stage after the dehydration stage finishes, or once only send above-mentioned one or more power consumption to the terminal of binding in advance after the laundry period finishes. Because all sent the power consumption of each stage to the terminal of binding in advance in this application, consequently the user can learn the power consumption of different stages to convenience of customers adjusts the time of using in each stage according to the demand of self, lets the user have specific understanding to the power consumption of washing machine each stage, also is favorable to user's using electricity wisely.
In some optional embodiments, the power consumption of the auxiliary device during the washing cycle includes: the power consumption of the display panel and/or the power consumption of the drain pump. The power consumption of the display panel is equal to the power of the display screen multiplied by the running time, and the goodness of the drainage pump is equal to the power of the drainage pump multiplied by the running times multiplied by the single running time. Compared with the power consumption of the motor and the power consumption of the heating process, the proportion occupied by the power consumption of the auxiliary device can be almost ignored.
Referring to fig. 2, the present application also provides a motor power determining apparatus, including: a parameter acquisition unit 11 and a power calculation unit 12.
A parameter obtaining unit 11 for obtaining magnetic induction B in the motor, and the motorThe length L of the magnetic induction line cut by the coil, the rotation radius R of the motor coil, the rotation speed N of the motor and the resistance R of the motorResistance (RC)As reference data;
and the power calculating unit 12 is used for determining the power P of the motor according to the electromagnetic induction law according to the reference data.
It is to be noted that, for the existing motors, the model of the motor is mainly given, B, L, R and R in the above reference dataResistance (RC)In practice, the above parameters may be determined according to the model of the motor, the above parameters need not be actually measured, and may be determined directly according to the model of the motor, so that only the rotation speed of the motor actually needs to be determined in the reference data, and in practical application, the rotation speed of the motor is set by the user when the motor is used, i.e., the rotation speed of the motor may be determined according to the user's setting, so that the above reference data is easily obtained, and B, L, R in the reference data are easily obtainedResistance (RC)And the precision of the reference data is only related to the manufacturing precision of the motor, and the process of acquiring the reference data does not actually relate to any process of artificially detecting external parameters.
In some alternative embodiments, the power calculating unit 12 determines the power P of the motor according to the law of electromagnetic induction based on the reference data, including:
determining the power P of the motor by adopting the following formula:
specifically, where B, L, R and the R resistance are in the above formula in units of International Standard units, Tesla, meters, and ohms, respectively, and N is in units of revolutions per minute. In the application, the condition of the motor when acting is analyzed by adopting the electromagnetic induction law, and then a calculation formula for calculating power is provided, the actual power of the motor when running can be obtained by adopting the formula and combining the running time calculation of the motor, B, L, R and R resistance in the formula are fixed parameters related to the motor, and the fixed parameters can be obtained after the model of the motor is determined, so that the actual power of the motor can be known only by determining the numerical value of N, the whole process does not need to introduce external parameters for correction, the calculated power precision is higher, particularly, the actual running power of the motor can be directly obtained when the rotating speed N is different from the rated rotating speed, and the actual power consumption of the motor is further obtained.
The present application also provides a washing machine power consumption detection device for determining the power consumption of a washing machine in a washing cycle, wherein the washing cycle includes a main washing stage, a rinsing stage and a dewatering stage, please refer to fig. 3, the washing machine power consumption detection device includes: a power detection unit 21;
the electric quantity detection unit is used for acquiring the power consumption of the motor of the washing cycle or acquiring the sum of the power consumption of the motor of the washing cycle and the power consumption of the auxiliary device as the power consumption of the washing machine in the washing cycle when the heating process for heating the washing water is not included in the main washing stage;
the electric quantity detection unit is further used for acquiring the sum of the electric power consumption of the motor and the electric power consumption of the heating process in the washing period or acquiring the sum of the electric power consumption of the motor, the electric power consumption of the heating process and the electric power consumption of the auxiliary device in the washing period as the electric power consumption of the washing machine in the washing period when the main washing stage comprises the heating process;
the electric quantity detection unit adopts any one of the determination devices provided by the application to determine the operation power P1 of the motor in the main washing stage and determines the power consumption W of the motor in the main washing stage according to the operation time length t1 of the motor in the main washing stage and the operation power P1Main washing；
And/or the electric quantity detection unit determines the power P2 of the motor in the rinsing stage and determines the power W of the motor in the rinsing stage according to the power P2 and the running time t2 of the motor in the rinsing stageRinsing。
Particularly, when it is not necessary to heat the washing water in the main washing stageWhen the power consumption of the washing machine in the washing period is required to be further accurately calculated, the sum of the power consumption of the motor and the power consumption of the auxiliary device can be used as the power consumption of the washing machine, and the power consumption of the washing machine in the washing period comprises the power consumption of the motor in a main washing stage, the power consumption of the motor in a rinsing stage and the power consumption of the motor in a dewatering stage. When the main washing stage does not comprise a heating process and the power consumption of the motor in the main washing stage and/or the rinsing stage is determined, the motor power determining device provided by the application is adopted to determine the running power of the motor in the main washing stage and/or the rinsing stage, because the model of the washing machine can be known by a user, B, L, R, R in the reference data can be determined according to the model of the washing machineResistance (RC)Therefore, only the rotating speed of the motor in the operation process needs to be determined actually, and the operation duration of the motor in each stage is combined, so that the power consumption of the motor in the main washing stage and/or the rinsing stage can be determined by adopting the device provided by the application.
In some alternative embodiments, the main wash phase motor is operated for a time period t1 ═ tMain washing*kMain washing/(1+kMain washing)
Wherein, tMain washingIs the total duration of the main wash stage, kMain washingThe motor rotation-stop ratio is in the main washing stage;
and/or the operating time t2 of the rinsing phase motor is tRinsing*kRinsing/(1+kRinsing)
Wherein, tRinsingFor the total duration of the rinsing phase, kRinsingThe motor rotation-stop ratio in the rinsing stage.
Optionally, the motor rotation-stop ratios in the main washing stage and the rinsing stage are the same; and/or the rotation speed of the motor in the main washing stage and the rinsing stage is the same.
In some optional embodiments, the electric quantity detection unit obtains the electric power consumption W of the motor in the dehydration stageDewateringThe method comprises the following steps: obtaining the product of the power consumption of the motor and the dehydration times of a single dehydration process in the dehydration stage as the power consumption W of the motor in the dehydration stageDewatering. Optionally, the power consumption of the motor in the single dehydration process in the dehydration stage is 0.04 kw.h.
In some optional embodiments, when the main washing stage includes a heating process, the power detecting unit obtains a heating process power consumption watherm, including:
acquiring the water inlet volume V of a main washing stage and the temperature difference delta t of water in the washing machine before and after heating;
the following formula is adopted to determine the power consumption of the motor in the heating stage:
Wheating of＝ρ*V*cp*Δt
Or acquiring the water inlet quality m of the main washing stageWater (W)The temperature difference delta t of the water in the washing machine before and after heating;
the following formula is adopted to determine the power consumption of the motor in the heating stage:
Wheating of＝mWater (W)*cp*Δt
Where ρ is the density of water, cpIs the specific heat capacity of water.
In some optional embodiments, as shown in fig. 3, further comprising: an information transmitting unit 22;
the information sending unit is used for sending one or more of the power consumption of the washing machine in the washing cycle, the power consumption of the motor in the main washing stage, the power consumption of the motor in the rinsing stage, the power consumption of the motor in the dewatering stage, the power consumption of the auxiliary device and the power consumption of the heating process to the pre-bound terminal.
In some optional embodiments, the power consumption of the auxiliary device during the washing cycle includes: the power consumption of the display panel and/or the power consumption of the drain pump.
The application also provides a washing machine, which comprises the motor power determining device or the washing machine power consumption detecting device.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (19)
1. A method of determining motor power, comprising:
obtaining the magnetic induction intensity B in the motor, the length L of a coil cutting magnetic induction line in the motor, the rotating radius R of a motor coil, the rotating speed N of the motor and the resistance R of the motorResistance (RC)As reference data, the magnetic induction intensity B, the length L of a coil cutting magnetic induction line in the motor, the rotation radius R of a motor coil and the resistance R of the motorResistance (RC)The method is directly determined by the type of the motor, and the rotating speed N of the motor is set by a user;
determining the power P of the motor according to the reference data and an electromagnetic induction law;
determining the power P of the motor according to the law of electromagnetic induction according to the reference data, comprising:
determining the power P of the motor using the formula:
P=π2B2L2r2N2/（900Rresistance (RC)) Wherein, B, L, R and RResistance (RC)Units of (a) are tesla, meter and ohm, respectively, and units of N are revolutions per minute.
2. A method for detecting the power consumption of a washing machine, which is used for determining the power consumption of the washing machine in a washing cycle, wherein the washing cycle comprises a main washing stage, a rinsing stage and a dehydration stage, and is characterized by comprising the following steps:
when the main washing stage does not include a heating process for heating washing water, acquiring the power consumption of a motor of the washing cycle, or acquiring the sum of the power consumption of the motor of the washing cycle and the power consumption of an auxiliary device as the power consumption of the washing machine of the washing cycle;
when the main washing stage comprises the heating process, acquiring the sum of the power consumption of the motor and the power consumption of the heating process in the washing period, or acquiring the sum of the power consumption of the motor, the power consumption of the heating process and the power consumption of the auxiliary device in the washing period as the power consumption of the washing machine in the washing period;
wherein the motor power determination method of claim 1 is used to determine the motor operating power P1 for the main wash phase, and the motor power consumption W for the main wash phase is determined based on P1 and the operating time t1 of the motor for the main wash phaseMain washing；
And/or, determining the rinsing stage motor power P2 by the motor power determination method according to claim 1, and determining the rinsing stage motor power consumption W according to P2 and the rinsing stage motor operation time t2Rinsing。
3. The method for detecting power consumption of a washing machine according to claim 2,
the running time of the motor in the main washing stage is t1= tMain washing*kMain washing/（1+kMain washing）
Wherein, tMain washingIs the total duration of the main wash phase, kMain washingThe motor rotation-stop ratio is in the main washing stage;
and/or the rinsing phase motor is operated for a time period t2= tRinsing*kRinsing/（1+kRinsing）
Wherein, tRinsingIs the total duration of the rinsing phase, kRinsingThe motor rotation-stop ratio in the rinsing stage.
4. The method for detecting power consumption of a washing machine according to claim 3,
the motor rotation-stop ratios of the main washing stage and the rinsing stage are the same;
and/or the rotating speed of the motor in the main washing stage and the rinsing stage is the same.
5. The method of any one of claims 2 to 4, wherein the power consumption W of the motor in the dehydration stage is obtainedDewateringThe method comprises the following steps:
obtaining the product of the power consumption of the motor and the dehydration times of a single dehydration process in the dehydration stage as the power consumption W of the motor in the dehydration stageDewatering。
6. The method for detecting power consumption of a washing machine according to claim 5,
the power consumption of the motor in the single dehydration process in the dehydration stage is 0.04 KW.h.
7. The method of any one of claims 2 to 4, wherein when the main washing stage includes a heating process, the heating process power consumption W is obtainedHeating ofThe method comprises the following steps:
acquiring the water inlet volume V of the main washing stage and the temperature difference delta t of water in the washing machine before and after heating;
the following formula is adopted to determine the power consumption of the motor in the heating stage:
Wheating of=ρ*V*cpDelta t or, obtaining the water inlet quality m of the main washing stageWater (W)The temperature difference delta t of the water in the washing machine before and after heating;
the following formula is adopted to determine the power consumption of the motor in the heating stage:
Wheating of=mWater (W)*cp*△t
Where ρ is the density of water, cpIs the specific heat capacity of water.
8. The washing machine power consumption detection method according to any one of claims 2 to 4, further comprising: and sending one or more of the power consumption of the washing machine in the washing cycle, the power consumption of the motor in the main washing stage, the power consumption of the motor in the rinsing stage, the power consumption of the motor in the dehydration stage, the power consumption of the auxiliary device and the power consumption of the heating process to a pre-bound terminal.
9. The method for detecting power consumption of a washing machine according to any one of claims 2 to 4, wherein the power consumption of the auxiliary device in the washing cycle comprises: the power consumption of the display panel and/or the power consumption of the drain pump.
10. A motor power determination apparatus, comprising:
a parameter acquisition unit for acquiring the magnetic induction B in the motor, the length L of the coil cutting magnetic induction line in the motor, the rotation radius R of the motor coil, the rotation speed N of the motor and the resistance R of the motorResistance (RC)As reference data, the magnetic induction intensity B, the length L of a coil cutting magnetic induction line in the motor, the rotation radius R of a motor coil and the resistance R of the motorResistance (RC)The method is directly determined by the type of the motor, and the rotating speed N of the motor is set by a user;
the power calculation unit is used for determining the power P of the motor according to the reference data and an electromagnetic induction law;
the power calculation unit determines the power P of the motor according to the reference data and an electromagnetic induction law, and the power calculation unit comprises:
determining the power P of the motor using the formula:
P=π2B2L2r2N2/（900Rresistance (RC)) Wherein, B, L, R and RResistance (RC)Units of (a) are tesla, meter and ohm, respectively, and units of N are revolutions per minute.
11. A washing machine power consumption detecting apparatus for determining a washing machine power consumption during a washing cycle including a main wash phase, a rinse phase and a spin phase, comprising: an electric quantity detection unit;
the electric quantity detection unit is used for acquiring the power consumption of the motor of the washing cycle or acquiring the sum of the power consumption of the motor of the washing cycle and the power consumption of the auxiliary device as the power consumption of the washing machine in the washing cycle when the heating process for heating the washing water is not included in the main washing stage;
the electric quantity detection unit is further used for acquiring the sum of the electric power consumption of the motor and the electric power consumption of the heating process in the washing period or acquiring the sum of the electric power consumption of the motor, the electric power consumption of the heating process and the electric power consumption of the auxiliary device in the washing period as the electric power consumption of the washing machine in the washing period when the main washing stage comprises the heating process;
wherein the electric quantity detecting unit determines a main washing stage motor operation power P1 using the motor power determining apparatus of claim 10, and determines a main washing stage motor electric power consumption W based on P1 and a main washing stage motor operation time period t1Main washing；
And/or, the electric quantity detecting unit adopts the motor power determining device as claimed in claim 10 to determine the rinsing stage motor power P2 and determine the rinsing stage motor power consumption W according to P2 and the rinsing stage motor operation time t2Rinsing。
12. The washing machine power consumption detection apparatus according to claim 11,
the running time of the motor in the main washing stage is t1= tMain washing*kMain washing/（1+kMain washing）
Wherein, tMain washingIs the total duration of the main wash phase, kMain washingThe motor rotation-stop ratio is in the main washing stage;
and/or the rinsing phase motor is operated for a time period t2= tRinsing*kRinsing/（1+kRinsing）
Wherein, tRinsingIs the total duration of the rinsing phase, kRinsingThe motor rotation-stop ratio in the rinsing stage.
13. The washing machine power consumption detection apparatus according to claim 12,
the motor rotation-stop ratios of the main washing stage and the rinsing stage are the same;
and/or the rotating speed of the motor in the main washing stage and the rinsing stage is the same.
14. The washing machine power consumption detection apparatus according to any one of claims 11 to 13, wherein the power detection unit obtains a dehydration stage motor power consumption WDewateringThe method comprises the following steps:
obtaining the product of the power consumption of the motor and the dehydration times of a single dehydration process in the dehydration stage as the power consumption W of the motor in the dehydration stageDewatering。
15. The washing machine power consumption detection apparatus according to claim 14,
the power consumption of the motor in the single dehydration process in the dehydration stage is 0.04 KW.h.
16. The washing machine power consumption detection apparatus according to any one of claims 11 to 13, wherein when the main washing stage includes a heating course, the power detection unit obtains a heating course power consumption watherm, including:
acquiring the water inlet volume V of the main washing stage and the temperature difference delta t of water in the washing machine before and after heating;
the following formula is adopted to determine the power consumption of the motor in the heating stage:
Wheating of=ρ*V*cp*△t
Or acquiring the water inlet quality m of the main washing stageWater (W)The temperature difference delta t of the water in the washing machine before and after heating;
the following formula is adopted to determine the power consumption of the motor in the heating stage:
Wheating of=mWater (W)*cp*△t
Where ρ is the density of water, cpIs the specific heat capacity of water.
17. The washing machine power consumption detection apparatus according to any one of claims 11 to 13, further comprising: an information transmitting unit;
the information sending unit is used for sending one or more of the power consumption of the washing machine in the washing cycle, the power consumption of the motor in the main washing stage, the power consumption of the motor in the rinsing stage, the power consumption of the motor in the dehydration stage, the power consumption of the auxiliary device and the power consumption of the heating process to the pre-bound terminal.
18. The apparatus of any one of claims 11 to 13, wherein the power consumption of the auxiliary device during the washing cycle comprises: the power consumption of the display panel and/or the power consumption of the drain pump.
19. A washing machine comprising a motor power determining apparatus as claimed in claim 10 or comprising a washing machine power consumption detecting apparatus as claimed in any one of claims 11 to 18.
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| CN105155203A (en) * | 2015-06-30 | 2015-12-16 | 无锡小天鹅股份有限公司 | Washing machine power consumption calculating method |
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| CN108092568A (en) * | 2017-12-22 | 2018-05-29 | 吴柳平 | For the control system of the rotating speed of motor |
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| CN105177918B (en) * | 2015-08-05 | 2018-08-28 | 无锡小天鹅股份有限公司 | Monitoring method, washing machine and the washing machine of the power consumption of washing machine |
| CN107034617B (en) * | 2016-02-03 | 2020-01-14 | 青岛海尔洗衣机有限公司 | Washing machine power consumption monitoring method, washing machine and washing machine system |
| CN106120241B (en) * | 2016-06-30 | 2018-10-16 | 无锡小天鹅股份有限公司 | The electricity consumption of the washing machine and computational methods of water consumption, device and washing machine |
| CN207304351U (en) * | 2017-07-28 | 2018-05-01 | 华南理工大学 | A kind of rotor line ring type watertight torquematic transmission |
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| CN105155203A (en) * | 2015-06-30 | 2015-12-16 | 无锡小天鹅股份有限公司 | Washing machine power consumption calculating method |
| CN105891595A (en) * | 2016-05-19 | 2016-08-24 | 无锡小天鹅股份有限公司 | Method for calculating electricity consumption of washing machine, device and washing machine |
| CN108092568A (en) * | 2017-12-22 | 2018-05-29 | 吴柳平 | For the control system of the rotating speed of motor |
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