CN1025714C - vacuum cleaner - Google Patents

Abstract

A control device controls the suction performance of a fan motor housed in the main body of the cleaner. The control device increases the suction performance when the dust suction nozzle is working, and reduces the suction performance when the dust suction nozzle is not working. Corresponding to common floor vacuum nozzles and crevice vacuum nozzles, within the predetermined air flow range, the most suitable work control is automatically performed on the determined vacuum nozzles. Various vacuum cleaners that are actually used are pre-set. When changing the suction nozzle, change and select the flow range along with the change of the suction nozzle. Automatically select and change a variety of vacuum nozzles according to the changing size of the working situation. The blower motor uses a brushless DC motor with chopper control duty factor 100% operating range.

Description

Vacuum cleaner

The present invention relates to a kind of vacuum cleaner that the multiple dust absorption nozzle that is used interchangeably is arranged, the suction properties of its electricity driving blower fan (suction generating device) motor can be according to different dust absorption nozzles or different being controlled by the cleaning face of dust suction.

The vacuum cleaner that the present invention relates to comprise one be used to detect have electricity drive blower motor vacuum cleaner condition of work variation checkout gear and be used for driving the control device of blower motor according to the detected value control electricity of checkout gear.

The electricity that the vacuum cleaner that the present invention relates to has the operation of control vacuum cleaner drives blower motor, and it is copped wave control type Brushless DC motor that this electricity drives blower motor.

The present invention relates to a kind of vacuum cleaner, relate in particular to improvement vacuum cleaner with copped wave control system current transformer driving (inverter driving) Brushless DC motor.

Above-mentioned vacuum cleaner, promptly comprise detect have electricity drive blower motor vacuum cleaner condition of work variation checkout gear and drive the vacuum cleaner of the control device of blower motor, the existing announcement in the open No.280831/1986 of Japan Patent according to the detected value control electricity of checkout gear.Up to now, known have the detected value of checkout gears such as a kind of basis such as pressure sensor to control the technology that electricity drives the output of blower motor.

Yet the vacuum cleaner of these prior arts does not take in the working condition of dust absorption nozzle, promptly not according to being carried out the control of only operating characteristic by the cleaning of dust suction in the face of vacuum cleaner.

More particularly, do not consider that the exchange of different types of dust absorption nozzle is used, perhaps do not have in the air mass flow scope of consideration when the plugged filter of main body of dust collector the operating characteristic of vacuum cleaner to be controlled.

To explain the difference of the operating characteristic of vacuum cleaner when using different dust absorption nozzle below.When reality was used, the scope of the air mass flow of the dust absorption nozzle that for example is used for the crack 8 grades that the dust absorption nozzle that for example is used for general floorings 7 grades with big opening as shown in Figure 2 and top are done lessly was different.

Fig. 3 is the air dynamic behaviour curve map when on the main body of dust collector dust absorption nozzle 7 that is used for general floorings being housed.Curve P1 is the output static pressure curve that electricity drives blower motor among the figure.The filter that curve A 1 and A2 are illustrated in vacuum cleaner does not have under the blocked situation, is used for the discharge loss pressure of the dust absorption nozzle of general floorings.

As shown in Figure 3, at the vacuum cleaner with the dust absorption nozzle 7 that is used for general floorings, curve A 1 is air mass flow Q(a during filter does not have to stop up) lower limit, curve A 2 is air mass flow Q(a during filter not have obstruction) higher limit.△ H1 is the change width of static pressure of the dust absorption nozzle 7 of general floorings, and △ Q1 is the air mass flow Q(a of the dust absorption nozzle 7 of general floorings) the change width.

When general floorings dust absorption nozzle 7 was mobile on the cleaning face of need dust suction, because the contact conditions of general floorings dust absorption nozzle 7 changes, exhaust resistance also changed and changes between curve A 1 and A2.

The discharge loss of dust absorption nozzle part reduces and reduces with air mass flow.As shown in Figure 3, static pressure change width △ H1 is the poor of curve A 1 and A2, and it is that its is done lessly according to the change width of the discharge loss pressure of dust suction operation, and at curve during near a side of less air mass flow, and curve A 1 and A2 ten minutes are approaching.

Curve B 1 and B2 are illustrated in the discharge loss pressure under the situation of plugged filter of vacuum cleaner, compare with A2 with curve A 1, and along with the obstruction of filter, the pressure loss increases, and its value is bigger.

As shown in Figure 3, curve B 1 is the air mass flow Q(b during the plugged filter) lower limit, curve B 2 is air mass flow Q(b during the plugged filter) higher limit.

As mentioned above, the difference of curve B 1 and B2 is the change width that dust suction operation produces, and also is corresponding to each air mass flow Q(b) the pressure loss change width of dust absorption nozzle part.In addition, air mass flow Q(b) be illustrated in the lower limit of the actual scope of application of vacuum cleaner on the dust suction properties curve.

As shown in Figure 4, have the actual scope of application of vacuum cleaner of general floorings dust absorption nozzle 7 at air mass flow Q(a) and air mass flow Q(b) between.Air mass flow is less than Q(b) be the out of use scope of vacuum cleaner with general floorings dust absorption nozzle 7.

In Fig. 4, curve P2 has pointed out vacuum cleaner in the suction properties of 100 volts of strong operating periods, and curve P3 has pointed out the suction properties of vacuum cleaner 50 volts of weak operating periods.

Air dynamic behaviour curve when in addition, on main body of dust collector crack dust absorption nozzle 8 being installed as shown in Figure 5.When electricity drives the output static pressure curve P3 of blower motor when identical with curve P1 among Fig. 3, because the opening of crack dust absorption nozzle 8 is little, so discharge loss pressure just greatly.

As shown in Figure 5, in the vacuum cleaner with crack dust absorption nozzle 8, curve C 1 is the air mass flow Q(c during filter does not have to stop up) lower limit, curve C 2 is the air mass flow Q(c during filter not have obstruction) higher limit.△ H2 is the change width of the static pressure H of crack dust absorption nozzle 8, and △ Q2 is because the air mass flow Q(c of crack dust absorption nozzle 8) the change width.

Therefore, even the filter of main body of dust collector does not stop up, shown in curve C 1, discharge loss pressure is also bigger, even under maximum air flow amount situation, when crack dust absorption nozzle 8 from by the cleaning of dust suction when moving, it still has bigger air mass flow Q(c) value.This value be substantially equal to or greater than the air mass flow Q(b under the actual scope of application of as shown in Figure 3 air mass flow) lower limit.

As shown in Figure 5, curve D 1 is air mass flow Q(d during the plugged filter) lower limit, curve D 2 is air mass flow Q(d during the plugged filter) higher limit.

As shown in Figure 6, have the actual scope of application of vacuum cleaner of crack dust absorption nozzle 8 at air mass flow Q(c) and air mass flow Q(d) between.As shown in Figure 6, the non-scope of application with vacuum cleaner of crack dust absorption nozzle 8 is less than air mass flow Q(d) scope.

Curve C 2 shows when crack dust absorption nozzle 8 is mobile on the cleaning face of need dust suction, the discharge loss pressure of the change upper limit side that rises and falls.Because the opening of crack dust absorption nozzle 8 is little, crack dust absorption nozzle 8 closely contacts with the cleaning face that needs dust suction, and at this moment, the pressure at expulsion loss is bigger.Change width between curve C 1 and the C2 is greater than the change width between curve A 1 and the A2 in the general floorings dust absorption nozzle 7.

When filter stopped up, the air mass flow lower limit of the actual scope of application became air mass flow Q(d).At this moment, the discharge loss pressure curve is by curve D 1 expression, and the discharge loss pressure curve of change upper limit side is by curve D 2 expressions.

As mentioned above, have such as the air mass flow scope Q(a in the actual scope of application of the dust absorption nozzle of general floorings dust absorption nozzle 7 big openings)-Q(b) with such as the air mass flow scope Q(c in the actual scope of application of the dust absorption nozzle of crack dust absorption nozzle 8 little openings)-Q(d) different.More representational Fig. 3 and example shown in Figure 5, air mass flow Q(a as can be known)＞air mass flow Q(c), air mass flow Q(b)＞air mass flow Q(d).

Corresponding to Fig. 3 and Fig. 5, the spendable air mass flow scope of above-mentioned reality and the non-scope of application of taking from dust suction properties drop point have been shown in Fig. 4 and Fig. 6.

Shown in above-mentioned each figure, outside the actual scope of application promptly greater than air mass flow Q(a) and air mass flow scope Q(c) in and be lower than air mass flow Q(b) and air mass flow scope Q(d) in, by reducing the suction properties parameter widely, can save the power consumption of vacuum cleaner and reduce its noise.

In order to obtain above-mentioned suction properties, control dust absorption nozzle.When Fig. 4 is overlapped into Fig. 7 with Fig. 6, just understand easily,, can not obtain the characteristic compatible mutually two dust absorption nozzles if only control with a suction properties.

That is, less than air mass flow Q(b) the air mass flow scope in, the suction properties of generation has reduced suction force.For dust absorption nozzle,, therefore, there is a shortcoming, promptly when reality is used, a little less than suction force may become too owing to originally just will control the suction force reduction as the little opening of crack dust absorption nozzle 8.

In addition, less than air mass flow Q(d) the air mass flow scope in, the suction properties of generation has reduced suction force.There is a shortcoming in dust absorption nozzle for as the big opening of general floorings dust absorption nozzle 7, even the time spent, the not enough situation of dust suction force can appear in dust absorption nozzle.

Prior art problems is when change using different types of dust absorption nozzle such as general floorings dust absorption nozzle 7 and crack dust absorption nozzle 8, and what the dust absorption nozzle of all kinds was carried out is the control of same suction properties.

That is, for example,, be only air mass flow even for general floorings dust absorption nozzle 7, but just too big for little crack dust absorption nozzle 8 the discharge loss pressure of opening.Therefore, this will cause that electricity drives the overheated of blower motor, shortens the service life that electricity drives blower motor.

Similarly, for example, even the air mass flow that is best suited for for the little crack dust absorption nozzle 8 of opening, however for the big general floorings dust absorption nozzle 7 of opening, this will produce the problem of the not enough and suction properties decline of suction air flow.

In above-mentioned conventional art, only have only a kind of operating characteristic to deal with to have different qualities as spoiling rice, floor and carpet etc. by the cleaning face of dust suction.Therefore, how this consider the accurate control to the suction properties of being undertaken by the cleaning face of dust suction accordingly, being fit to that characteristic is different separately hardly.

Therefore, generally speaking be not taken into full account the suction properties parameter by the cleaning face of dust suction corresponding to each characteristic.So, if improve above-mentioned not enough point, operation is controlled automatically, then the suction properties of vacuum cleaner is compared with traditional vacuum cleaner and will greatly be improved.

In the vacuum cleaner of prior art, electricity drives blower motor and uses copped wave control system current transformer to drive Brushless DC motor.The copped wave control system current transformer that has disclosed this vacuum cleaner in the open No.214219/1985 of for example Japan Patent drives Brushless DC motor.In this vacuum cleaner, the revolution according in the control Brushless DC motor obtains predetermined suction force.

And, up to now, drive in the vacuum cleaner of Brushless DC motor at above-mentioned use copped wave control system current transformer, do not note according to abnormal revolution order etc. to the protection of overload operation with prevent further rotation at a high speed.

The purpose of this invention is to provide a kind of vacuum cleaner, and be the vacuum cleaner that can obtain only suction properties parameter for the actual various dust absorption nozzles that use with different air mass flow scopes.

Another object of the present invention provides a kind of vacuum cleaner that can save electric energy and low-noise structural during non-dust suction.

Further purpose of the present invention provides a kind of vacuum cleaner that can carry out optimal operating characteristic control automatically to the different dust absorption nozzle through differentiating.

Further purpose of the present invention provides a kind ofly can be differentiated by the vacuum cleaner of the cleaning face of dust suction automatically according to control suction properties parameter control device.

Further purpose of the present invention provides a kind of can the improvement corresponding to each by the vacuum cleaner of the suction properties parameter of the cleaning face of dust suction.

Further purpose of the present invention provides a kind of vacuum cleaner that can preestablish optimal suction properties parameter.

Further purpose of the present invention provides a kind of energy basis corresponding to each vacuum cleaner of accurately being controlled by the suction properties parameter of the cleaning face of dust suction.

Further purpose of the present invention provides a kind of vacuum cleaner that copped wave control system current transformer drives Brushless DC motor that has that can easily prevent the work of transshipping.

Further purpose of the present invention provide a kind of have can prevent since the high speed rotation that improper rotate command value causes have a vacuum cleaner that copped wave control system degree stream device drives Brushless DC motor.

According to the present invention, vacuum cleaner comprises checkout gear, detects the variable that the work with dust absorption nozzle changes, and this variable comprises static pressure, air mass flow and electric current etc.; And control device, this control device drives the suction properties parameter of blower motor according to the detected Numerical Control electricity of checkout gear.

When dust absorption nozzle was worked, control device improved suction properties, and when dust absorption nozzle quit work, control device reduced suction properties.

First lower limit of air mass flow scope in the little air mass flow side of first lower limit, is set second lower limit when setting actual the use.When the air mass flow scope was lower than first limit value, suction properties reduced greatly.

In the air mass flow scope between first and second lower limits, when suction operation caused load change, it can control the rising of suction properties parameter predetermined amounts, and when zero load change, it will keep lower suction properties parameter.

When the work because of dust absorption nozzle of detecting causes that variable such as static pressure, air mass flow and electric current etc. have change, and when changing in the given time, can differentiate the working condition whether it adapts to dust absorption nozzle greater than scheduled volume.

Therefore, improve the suction properties parameter, can obtain the needed suction force of dust suction by predetermined amounts.In addition, if, then reduce the suction properties parameter, can save the noise of electric energy and reduction vacuum cleaner by predetermined amounts when not detecting load change in the scheduled period.

According to the present invention, during the non-dust suction that dust absorption nozzle is not worked, the suction properties parameter is lowered, and can save electric energy, reduces the noise of vacuum cleaner.

According to the detected load change that causes because of dust absorption nozzle work, can improve the suction properties parameter automatically, therefore, can obtain to be suitable for the suction properties parameter of dust suction operation.And can control the suction properties parameter automatically according to the frequency of the operand of dust absorption nozzle.

Only in the predetermined air mass flow scope corresponding to the dust absorption nozzle of the dust absorption nozzle of big opening and little opening, and during the dust absorption nozzle that load change is big when loading onto little opening and promptly work, controlling the suction properties parameter can increase automatically.Therefore, can be automatically to connect, dust absorption nozzle through differentiating carries out optimal operation control.

According to the present invention, in the vacuum cleaner of the multiple dust absorption nozzle of convertible use, comprise, air mass flow scope in the actual use of multiple dust absorption nozzle is predicted the device and the control device of setting, in order to change and to select to be suitable for the air mass flow scope of corresponding dust absorption nozzle situation when changing dust absorption nozzle.

When multiple dust absorption nozzle is used in conversion, the going up in limited time of air mass flow when the air mass flow scope is used greater than corresponding dust absorption nozzle moves on to non-dust suction situation on the dust absorption nozzle.In this case, drive reducing of blower motor output, can save electric energy, reduce the noise of vacuum cleaner by electricity.

In addition, when multiple dust absorption nozzle is used in conversion, the air mass flow when the air mass flow scope is used less than corresponding dust absorption nozzle following in limited time, dust catcher is in the not enough situation of dust suction capactity.In this situation, owing to reduced the output of electric driving blower motor, the user can notice that filter has arrived the limit of stopping up.Simultaneously, drive the reducing of output of blower motor by electricity, can save electric energy, reduce the noise of vacuum cleaner.

Except that above-mentioned, though when as curtain etc. thin adhere on the dust absorption nozzle time, along with electricity drives the decline of blower motor output, can easily absorb and discharge.

According to the present invention, vacuum cleaner comprises electricity and drives blower motor, detects the checkout gear of vacuum condition variation and controls the control device that electricity drives blower motor according to the detected value of checkout gear.

This vacuum cleaner comprises the device of selecting and change multiple suction properties parameter according to the size of operational circumstances variable quantity automatically, the variation of this vacuum cleaner suction properties situation can be the variation of vacuum and air mass flow, load change during also can be dust absorption nozzle move back and forth on by the cleaning face of dust suction and the variation of the vacuum cleaner operational circumstances that obtains.

According to predefined work suction properties parameter, it can automatically be detected optimal operating characteristic parameter by the cleaning face of dust suction to various.And, according to this testing result, can carry out automatic control operation.

Therefore, can control accurately, suction properties is adapted to by the different attribute of the cleaning face of dust suction.So, to compare corresponding to the vacuum cleaner by the cleaning face of dust suction of multiple different attribute with traditional a kind of operating characteristic parameter of having only, the suction properties parameter of vacuum cleaner of the present invention can be improved.

According to the present invention, when to various different attributes carried out dust suction by the cleaning face of dust suction the time, the variation that can obtain the vacuum condition according to the load change of the dust absorption nozzle of vacuum cleaner, and differentiate various automatically by the cleaning face of dust suction.

According to the present invention, in vacuum cleaner, pack into by Brushless DC motor copped wave control system converter plant control revolution, electricity driving blower fan, and this electric drive motor that installs in main body of dust collector is the Brushless DC motor with working region of 100% copped wave control duty factor.

In addition, Brushless DC motor is to have the syncmotor of permanent magnet as magnetic field, and converter plant is by changing the duty factor, and the control revolution makes in check revolution bring it into load condition.

On the other hand, bigger when loading, duty factor is 100% o'clock, if revolution does not rise to the situation of control revolution, then Brushless DC motor is with the value rotation of balanced load torque.

The specification characteristic of Brushless DC motor is design like this, that is, make the back-emf voltage that produces in the rotor winding equal supply voltage.Therefore, greater than the load condition of above-mentioned situation the time, only reduce revolution, and can not cause that the mistake of input power increases greatly.

That is, the back-emf voltage amount that the recruitment of electric current reduces corresponding to the revolution reduction, the increase of this input power is limited in the scheduled volume.

So, with the same under the non-dust suction situation,, make load become big even drive blower motor because big air mass flow flows into electricity, also may prevent the rapid increase of input power.

And, when because the improper situation of control device when having exported at a high speed active bid value, also can automatically stop revolution to rise to greater than predetermined number of revolutions.

According to the present invention; using copped wave control system converter plant to drive in the vacuum cleaner of Brushless DC motor; protective device that need not be special also can easily prevent overload work, and can stop because of the unusual transmission bid value of control device and cause abnormal high speed rotating.Therefore obtained improved vacuum cleaner.

Prevent that owing to above-mentioned overload control from not being to avoid overload work with the control handling procedure, therefore, from the reliability aspect, even under the situation the worst, that microcomputer breaks down, it also is very useful.

And near the input power upper limit that allows, when load was big, copped wave control duty factor almost was 100%.Therefore, copped wave control is not worked or is worked seldom, because it is very little to interrupt the higher harmonics component that causes, so, can realize comprising the best condition of the system effectiveness of converter plant and Brushless DC motor.Promptly in high load side, vacuum cleaner can obtain high efficient, for example, can reduce temperature rise.

Fig. 1 is according to the embodiment of vacuum cleaner of the present invention and the block diagram of control device thereof;

Fig. 2 is the outline drawing of general floorings dust absorption nozzle and crack dust absorption nozzle;

Fig. 3 and Fig. 4 are the aerodynamics suction properties curve maps that expression electricity drives the relation between the part throttle characteristics of the output characteristics of blower motor and general floorings dust absorption nozzle;

Fig. 5 and Fig. 6 are the aerodynamics suction properties curve maps that expression electricity drives the relation between the part throttle characteristics of the output characteristics of blower motor and crack dust absorption nozzle;

Fig. 7 is superimposed Fig. 4 and Fig. 6, is that expression electricity drives the aerodynamics suction properties curve map that concerns between the part throttle characteristics of the output characteristics of blower motor and general floorings dust absorption nozzle and crack dust absorption nozzle;

Fig. 8 is that expression the present invention electricity drives the output characteristics of blower motor and the aerodynamics suction properties curve map of the relation between the part throttle characteristics;

Fig. 9 represents that the electricity that carries out an embodiment of suction properties control according to the present invention drives the output characteristics of blower motor and the aerodynamics suction properties curve map of the relation between the part throttle characteristics;

Figure 10 A represents that the electricity that carries out an embodiment of suction properties control according to the present invention drives the static pressure of blower motor and the figure of the relation between the dust suction time;

Figure 10 B represents that the electricity that carries out an embodiment of suction properties control according to the present invention drives the revolution of blower motor and the figure of the relation between the dust suction time;

Figure 11 be expression carry out according to the present invention suction properties control another embodiment's and part throttle characteristics between the aerodynamics suction properties curve map of relation;

Figure 12 A represents that the electricity that carries out another embodiment of suction properties control according to the present invention drives the static pressure of blower motor and the figure of the relation between the dust suction time;

Figure 12 B represents that the electricity that carries out another embodiment of suction properties control according to the present invention drives the revolution of blower motor and the figure of the relation between the dust suction time;

Figure 13 is the aerodynamics suction properties curve map that the expression electricity drives the output characteristics and the relation between the part throttle characteristics in the general floorings dust absorption nozzle of blower motor;

Figure 14 is the aerodynamics suction properties figure that the expression electricity drives the output characteristics and the relation between the part throttle characteristics in the floor nozzle of crack of blower motor;

Figure 15 is according to the flow chart of differentiating air mass flow in the conversion and control of the present invention;

Figure 16 is the curve map that concerns between expression vacuum and the air mass flow, and it shows the operating characteristic in the corresponding dust absorption nozzle;

Figure 17 is the curve map that concerns between vacuum and the air mass flow, and it illustrates the operating characteristic of a corresponding dust absorption nozzle and the load change of a corresponding dust absorption nozzle;

Figure 18 is the control block diagram according to the control device of an alternative embodiment of the invention;

Figure 19 is an overall structure figure, shows the speed control unit that comprises Brushless DC motor and current transformer control device of another embodiment of vacuum cleaner of the present invention;

Figure 20 and Figure 21 are to use the performance diagram of a Brushless DC motor as the vacuum cleaner of drive source;

Figure 22 is the performance diagram with vacuum cleaner of import-restriction function.

Explain one embodiment of the present of invention with reference to the accompanying drawings.

Fig. 1 is the structured flowchart of vacuum cleaner 1 and control device 6 thereof.Vacuum cleaner 1 mainly comprises filter 4 and the dust collecting box 5 that electricity drives blower motor 2, main body of dust collector 3, filters dust.Block representation of control device 6 usefulness is in the outside of main body of dust collector 3, and control device 6 places in the main body of dust collector 3 with the form of circuit hardware or microcomputer software.

Control device 6 comprises to be carried out and handles the detected value of checkout gear 9 and export a controlling value to the execution and the treating apparatus 10 of power control 11 with the power supply 12 of electric energy is provided to above-mentioned respectively device.Carry out and treating apparatus 10 comprises the discriminating gear 13 of dust absorption nozzle etc.

Checkout gear 9 passes through such as air flow sensor, pressure sensor, and current sensor and tachometer generator detect the various variable factors that electricity drives blower motor 2.This variable factor changes with the working condition of vacuum cleaner 1.Checkout gear 9 directly output is indicated the amount of recording of air mass flow or the combination of the amount of recording, and utilizes execution and treating apparatus 10 to obtain air mass flow indirectly.

Discriminating gears such as dust absorption nozzle 13 are included in to be carried out in the treating apparatus 10.Discriminating gear 13 is differentiated such as forms such as change width and change time and intervals with above-mentioned changing factor, and further differentiates the kind that is installed in the dust absorption nozzle on the main body of dust collector 3.

That is, the same with the explanation of above-mentioned Fig. 3 and Fig. 4, will illustrate below because static pressure H or the change width △ H1 of air mass flow Q or the differentiation of △ Q1 that the work of general floorings dust absorption nozzle 7 causes.

In the general floorings dust absorption nozzle 7 of big opening, the change width is little.Yet in the crack of little opening dust absorption nozzle 8, the change width is big.Therefore, utilize predetermined decision content can determine the kind of dust absorption nozzle.

Promptly, as long as according to there being big variable quantity to exist greater than predetermined decision content, whether just can determine is that dust absorption nozzle such as the little opening of crack dust absorption nozzle 8 grades is in work, this function can be finished by circuit, yet, what be more suitable for is that this function is made up of control of microcomputer software under the total of execution and treating apparatus 10.

Below with reference to the chain-dotted line part illustration of Fig. 8 suction properties parameter by said structure control.

That is, first lower limit of the actual air mass flow scope of using is set at air mass flow Q(b), second lower limit is set at air mass flow Q(d).When the air mass flow scope is lower than air mass flow Q(b) time, it is controlled on the low suction properties parameter shown in the curve P2, and is operated on the high suction properties parameter shown in the curve P3 by approach (0) → (1) → (2) → (3) → (4) → (5) route.

When vacuum cleaner 1 is operated in air mass flow Q(b) and air mass flow Q(d) between the air mass flow scope time, according to variation, the change width of checkout gear 9 detected values is greater than predetermined decision content, and, the variation of each predetermined space is all in the scope of scheduled volume, and then it can be judged and is contained in being the crack dust absorption nozzle 8 of little opening and can judging further that crack dust absorption nozzle 8 is operated under the actual operating position on the main body of dust collector 3.

Order by execution and treating apparatus 10 and control vacuum cleaner 1 increase predetermined draw characterisitic parameter according to the signal of telecommunication of discriminating gear 13 with above-mentioned functions.Thus, vacuum cleaner 1 can be operated in curve P4(route (6) → (7) → (8)), on the shown low suction properties parameter.Curve P4 is represented by the dot-dash curve.It is suitable for the little crack dust absorption nozzle 8 of opening.

When change was not greater than decision content in predetermined space, this was idle non-dust suction situation of dust absorption nozzle or situation that the general floorings dust absorption nozzle 7 of big opening is not installed.At latter event, it produces curve P2(route (4) → (5)), therefore the situation of shown low suction properties parameter, can save the noise of electric energy and reduction vacuum cleaner 1.

As mentioned above, by the size of detection load change width, variation and the air mass flow motor point in predetermined space, just may automatically obtain only suction properties parameter to the dust absorption nozzle of being installed.

Fig. 9-Figure 12 B will explain that control increases and reduce another embodiment of suction properties parameter.Comparison diagram 9, Figure 10 A and Figure 10 B, Figure 10 A and Figure 10 B show an example, and wherein abscissa is represented the working time, detects the change value of load then along with the variation of static pressure.

In Fig. 9, curve P ₁And P ₁Be output suction properties curve, curve E1 and E2 are the discharge loss pressure characteristics.

In Figure 10 A and Figure 10 B, when the static pressure that does not exist load change to cause during predetermined space T changed △ H, the suction properties parameter maintained static pressure H ₁On, it is N that N is counted in the wherein electric rotation that drives blower motor 2 ₁Detect predetermined space T at each, if according to the change width △ H that surpasses predetermined decision content more than ₁, " (A) shown in the part, it can work in and rise to H as Figure 10 B ₁Static pressure, revolution is N ₁, become high suction properties parameter.

According to this situation, when not according to change width △ H ₁The time, as Figure 10 B(B) part shown in, revolution turns back to original revolution N ₁, it can be worked under low suction properties parameter condition.

Above-mentioned control is the basic controlling to vacuum cleaner 1, when at Figure 10 B(A) and (B) electricity of part drive the revolution N of blower motor owing to there is change, when recuperation changed continually when each detects predetermined space T, the suction parameter repeated to change in short interval fast.Because it can cause the generation such as changes such as the metronome of vacuum cleaner 1 and vibrations, when it can continue n time at the predetermined time interval T of the zero load change that is detected (nXT), the reaction of the suction properties that slows down parameter, thus make it to reduce.

In Figure 11, curve Pa, Pb, Pc and Pd are output suction properties curves, and curve F is the discharge loss pressure characteristic.

In addition, relatively Figure 11, Figure 12 A and Figure 12 B as can be known, vacuum cleaner 1 is to increase or reduce the suction properties parameter with the amount that is directly proportional with static pressure H variation that dust absorption nozzle work during detecting predetermined space T causes.

On the other hand, vacuum cleaner 1 is to increase or reduce the suction properties parameter with the static pressure H variation that causes in response to dust absorption nozzle work during the detection predetermined space T.

At this moment, when situation about not changing for a long time at static pressure H occurred, the static pressure value Ha of original low suction properties parameter was used as setting value.This static pressure value Ha is set to Hmin(1), i.e. Ha=Hmin(1), vacuum cleaner is worked with revolution Na.

Few at dust absorption nozzle work number of times, be that changing number is such as detecting at each in predetermined space T once and under the situation between the low work number of the dust absorption nozzle of secondary, the minimum static pressure Hb of suction properties parameter is used as setting value, and this static pressure Hb is set to Hmin(2) be Hb=Hmin(2).

Next makes vacuum cleaner with revolution Nc and Nd work, so that increase the suction properties parameter of static pressure Hc and static pressure Hd with each scheduled volume along with the increase of the variation of the static pressure H that causes in each detection predetermined space T internal cause dust absorption nozzle work.

In Figure 12 A and Figure 12 B, operand be greatly dust absorption nozzle under the situation of working under a large amount of and high frequency, the static pressure value Hd of suction properties parameter maximum is taken as setting value, this static pressure value Hd is set at Hmax, i.e. Hd=Hmax.

When the workload of dust absorption nozzle reduces,, reduce the suction properties parameter of vacuum cleaner 1 corresponding to frequency.

As mentioned above, the suction properties parameter of vacuum cleaner 1 is grow under condition of work rapidly, is dying down under the condition of work at a slow speed, therefore can realize the automatic control to the suction properties parameter, adapts to user's sensation and needs.

And, be provided with because the setting of suction properties parameter lower limit one side was divided into for two steps, i.e. Ha=Hmin(1) and Hb=Hmin(2), so the minimum situation greater than once of the work of dust absorption nozzle can obtain necessary suction force.Therefore, when the user did not make dust absorption nozzle work with dust catcher 1 or user's long period veritably, suction force can reduce greatly, to save the electricity consumption of vacuum cleaner.

And, in the example of the control range of above-mentioned air mass flow in Fig. 8, be at air mass flow Q(b) and air mass flow Q(d) between.Yet the control range of air mass flow Q is not limited to the scope of above-mentioned example.

Since in the scope of whole air mass flow according to the working condition of dust absorption nozzle, appearance and variation thereof corresponding to load change are controlled the suction properties parameter, therefore, under the idle non-dust suction situation of dust absorption nozzle, can save electric energy and reduce the vacuum cleaner noise.

And, owing to corresponding to the work frequency of dust absorption nozzle the suction properties parameter is controlled, so at this moment can obtain and above-mentioned similar effect.

Below with reference to accompanying drawings, explain another embodiment of vacuum cleaner of the present invention.

As mentioned above, in the general floorings dust absorption nozzle 7 of big opening, the change width is little, yet, in the crack of little opening dust absorption nozzle 8, because of repeating to adhere to and discharge, so the change width is big, therefore, it is fully possible differentiating this dust absorption nozzle according to predetermined decision content.

That is, according to the differentiation route of as shown in figure 15 flow process, both are updated to predefined predetermined value the upper and lower bound value of the air mass flow of the air mass flow lower limit of the air mass flow higher limit of control change or control change or control change.

Below, explain that with reference to Figure 13 and Figure 14 a control has the example of suction properties parameter of the vacuum cleaner 1 of said structure.

In Figure 13, curve P11, P12 and P13 are output suction properties curves.Among Figure 14, curve P14, P15 and P16 are output suction properties curves.

That is, Figure 13 shows the little situation of detected value change width.It judges that in Figure 15 A route side this situation is applicable to the situation such as the dust absorption nozzle of the big opening of general floorings dust absorption nozzle 7,, has set air mass flow Q(a1 here) upper control limit and air mass flow Q(b1) lower control limit.

And these control limit values are that the air of dust suction properties parameter does not flow down limit value and sets respectively when having the maximum air flow amount of obstruction and filter 4 obstructions corresponding to filter 4 when the floor in the general floorings dust absorption nozzle 7 actual scopes of application of dust absorption nozzle and big opening contacts.

And curve P11, P12 among Figure 13, P13 are the output characteristic curves that electricity drives blower motor 2.Output characteristic curve P11, P12 and P13 preestablish to be adapted to the general floorings dust absorption nozzle 7 of above-mentioned big opening, by changing suction properties curve, the suction properties parameter that can obtain to be scheduled to.

That is to say, route among Figure 13 (0) → (1) → (2) → (3) → (4) → (5) → (6) → (7) are greater than air mass flow Q(a1) higher limit scope and less than air mass flow Q(b1) the scope of lower limit surpassed the scope of actual use.Therefore, do not need to export a unwanted output, it can be with the low output characteristics parameter work shown in the curve P11.

Among Figure 13 greater than air mass flow Q(a1) scope of route (0) → (1) of higher limit is the non-dust suction situation of moving on the dust absorption nozzle etc.In this above-mentioned situation, shown in the route among Figure 13 (0) → (1),, can save electric energy by reducing output, reduce the noise of vacuum cleaner.

In addition, less than air mass flow Q(b) in route (6) → (7) scope of lower limit, be the not enough scope of dust suction capactity.In this case, shown in Figure 13 route (6) → (7), by reducing output, the user can notice that filter 4 has stopped up the limit, simultaneously, can reach the saving electric energy, reduces the anti noise of vacuum cleaner.

Except that above-mentioned, even be adsorbed and stick together tightly, when air mass flow is reduced,, can easily discharge dust absorption nozzle and dust suction by reducing the suction properties parameter with dust absorption nozzle as frivolous materials such as curtain.

Practical ranges when in Figure 13, air mass flow scope Q(a1 in addition)-Q(b1) being actual dust suction.In this actual scope of application, can realize being applicable to the only suction properties parameter of the general floorings dust absorption nozzle 7 of big opening.

In the embodiment shown in fig. 13, can enough orders control from execution and treating apparatus 10.That is to say that on the output characteristic curve P12 shown in output characteristic curve P13 shown in route (2)-(3) or route (4)-(5), it can change between route (3) → (4).

And, in this example, show in the actual scope of application of actual dust suction situation two output characteristics parameter curves, yet it is not limited to two characteristic curves, it can be by a large amount of output characteristic curve change and combinations.

Figure 14 shows the big situation of detected value change width, and it is judged in the route side of Figure 15 B.This situation is applicable to the situation of listening dust absorption nozzle as the little opening of crack dust absorption nozzle 8, has set air mass flow Q(c1) upper control limit and air mass flow Q(d1) lower control limit.

And curve P14, P15 among Figure 14, P16 are the output characteristic curves that electricity drives blower motor 2.Output characteristic curve P14, P15 and P16 preestablish to be adapted to the crack dust absorption nozzle 8 of above-mentioned little opening.Similar to example shown in Figure 13, by changing curve, can realize through (0) ' → (1) ' → (2) ' → (3) ' → (4) ' → (5) ' → (6) ' → suction properties of (7) ' this route.

Embodiment shown in Figure 14 and Figure 13 has dissimilarity, in Figure 13, air mass flow Q(1) value and the value of air mass flow (d1) be changed, and air mass flow Q(c1)-suction properties parameter between Q(d1) also is changed.

In Figure 14, the curve P14 that represents electricity to drive the output characteristics parameter of blower motor 2 is set for the curve P11 that equals shown in Figure 13, also the output characteristics parameter of representing electricity to drive blower motor 2 is set for the curve P12 that equals shown in Figure 13.Yet it does not need curve P11 and P12 in Figure 13 to limit curve P14 and P15 shown in Figure 14.

As mentioned above, can differentiate the kind of dust absorption nozzle according to the size that detects measured value change width, according to judge order, can make the dust absorption nozzle that is installed on the main body of dust collector 3 in the air mass flow scope with the work of optimal suction ginseng property parameter.

In addition, in the above-described embodiments, illustration differentiate the size of change width by predetermined decision content, thereby differentiate the situation of the kind of dust absorption nozzle.

Yet, also can change width and a plurality of discriminant value that provides be provided, to differentiate the kind of dust absorption nozzle, therefore, can control the operating characteristic parameter according to the condition that is best suited for each dust absorption nozzle.

And the change width by detected value not only also can be judged the kind of dust absorption nozzle by differentiating alteration mode or upset condition according to the sampling when the predetermined space.

Explain the another embodiment with vacuum cleaner of Brushless DC motor of the present invention below with reference to accompanying drawings.

An example of vacuum characterisitic parameter has been shown among Figure 16.Shown in Figure 16 is the performance diagram of vacuum-air mass flow, and it shows an example of the work suction properties parameter of vacuum cleaner of the present invention.

In Figure 16, it is the situation on floor that operating characteristic parameter A 2 is used for by the cleaning face of dust suction.This characteristic working curve is the combination of constant air flow Q24 and constant vacuum H22, less than air mass flow Q21 the time, is operated under the constant vacuum H21 situation.

To above-mentioned similar, it is the situation of spoiling rice that characteristic working curve B2 is used for by the cleaning face of dust suction, and it is the situation of carpet that characteristic working curve C2 is used for by the cleaning face of dust suction.Be used for the characteristic working curve C2 of carpet, when electricity driving blower motor was worked with constant rotational speed operating characteristic parameter, the characteristic curve between air mass flow Q21 and Q22 was a downward-sloping characteristic curve.

In above-mentioned each characteristic working curve, during less than air mass flow Q21, all under constant vacuum H21, work.That is, less than air mass flow Q21 the time, air mass flow is in the scope that the air mass flow that causes owing to the plugged filter in the vacuum cleaner reduces.This scope is not the actual scope of application of vacuum cleaner between the operating period, and characteristic working curve has only one.

To explain that electricity drives the above-mentioned constant air flow of blower motor according to embodiment below, constant vacuum and constant rotation are counted the situation of work.

Then explanation is used for correctly judging and selecting a plurality of work suction properties curves also further each to be used instead the device of only work suction properties curve by the cleaning face of dust suction.

That is to say, under the situation of using vacuum cleaner 1, when dust absorption nozzle when being moved back and forth by the cleaning face of dust suction, dust absorption nozzle and driven the electric current of blower motor by the vacuum of the adhesive degree between the cleaning face of dust suction, vacuum cleaner inside, electricity and suction air flow that electricity drives blower motor will change.Above-mentioned variable quantity can be used as the variable quantity of the condition of work of vacuum cleaner.

Notice when using same dust absorption nozzle, the above-mentioned variable quantity of vacuum cleaner promptly since the dust absorption nozzle of vacuum cleaner move back and forth the variable quantity of the vacuum, electric current and the air mass flow that cause with according to different by the above-mentioned variable quantity of the cleaning face of dust suction.Therefore, it can be judged by the kind of the cleaning face of dust suction, yet change the operating characteristic parameter corresponding to discrimination result.

Above-mentioned situation is explained in more detail with reference to Figure 17.Figure 17 is the coincidence pattern of the vacuum-air mass flow performance diagram shown in load change curve and Figure 16 during dust absorption nozzle moves back and forth on by the cleaning face of dust suction.

In Figure 17, curve a2, b2, c2 and d2 are the load characteristic curves of dust absorption nozzle.In Figure 17, when by dust suction be the floor time, moving back and forth on the floor under the situation at the dust absorption nozzle of vacuum cleaner, the load curve of dust absorption nozzle will change between curve a2 and curve b2.

In addition, when by dust suction be when spoiling meter, spoil at the dust absorption nozzle of vacuum cleaner and move back and forth on the rice under the situation, the load curve of dust absorption nozzle will change between curve a2 and curve c2.

In addition, when by dust suction be carpet the time, moving back and forth on the carpet under the situation at the dust absorption nozzle of vacuum cleaner, the load curve of dust absorption nozzle will be in the change between curve a2 and the curve d2.

Therefore, when vacuum cleaner is operated under the characteristic working curve A2, and during to the carpet dust suction, under constant air mass flow Q24, the transfer point on the characteristic working curve A2 is at (e) point with (f).At this moment, vacuum according to the reciprocating motion of the dust absorption nozzle of vacuum cleaner 1 at H(e) and H(f) between the change.V represents the varying width of vacuum.

In addition, when vacuum cleaner is operated under the characteristic working curve A2, and when spoiling meter dust suction, the varying width of the vacuum on the characteristic curve A2 is W.

In addition, when vacuum cleaner is operated under the characteristic working curve A2, and during to the floor dust suction, the varying width of the vacuum on the characteristic curve A2 is X.

As mentioned above, when the air mass flow of vacuum cleaner is steady state value, can differentiate by the kind of the cleaning face of dust suction according to the difference of vacuum varying width.

In addition, when same carpet was carried out dust suction, under constant air flow Q22 situation, the varying width of vacuum was Z, and under constant air flow Q23 situation, the varying width of vacuum is Y.This fact is applied to the situation of spoiling rice or same floor dust suction to same.

Also can take another kind of scheme, above-mentioned discrimination threshold can by the vacuum varying width divided by mean value, make multiple discriminant value be merged into a discriminant value, form a nondimensional vacuum rate of change.

In addition, in above-mentioned situation, also be to be operated under the constant air flow Q, the example of the variation of vacuum as the variation of the condition of work of vacuum cleaner 1.

Replace above-mentioned situation, also the electricity that can change the load change with the dust absorption nozzle of vacuum cleaner drives the variation of the current change amount of blower motor 2 as the condition of work of vacuum cleaner 1.

In addition, at the constant vacuum duration of work, can be the variation of the variation of the variation of air mass flow Q and electric current as the condition of work of vacuum cleaner.At the constant revolution duration of work, can be the variation of vacuum, the variation of air mass flow Q and the variation of electric current are as the operation conditions change of vacuum cleaner.

Below, will explain the control method of the above embodiment of the present invention according to Figure 18.Figure 18 is the control block diagram of an embodiment of vacuum cleaner of the present invention.

In this embodiment, what electricity driving blower motor was used is Brushless DC motor 25, and revolution is then controlled by current transformer.

In Figure 18, the civil power (exchanging 100V) that comes from the socket (not shown) is rectified into direct current through conversion portion 21, then direct current is delivered to unsteady flow part 23 by current detecting part 22.Unsteady flow part 23 is subjected to produce three-phase alternating current from the control of the initiating signal of main control circuit 24, and it is offered Brushless DC motor 25.

Brushless DC motor 25 is equipped with rotor position detecting sensor 26, and the position feedback of rotor is arrived main control circuit 24, and the pressure sensor 27 that detects the vacuum cleaner internal vacuum is connected to main control circuit 24.

In above-mentioned structure, when vacuum cleaner is worked with constant air mass flow, use air flow sensor, utilize power output again, can carry out negative-feedback control to the revolution of Brushless DC motor 25.

Yet in this embodiment of the present invention, because air flow sensor is not installed, it is the revolution that calculates Brushless DC motor 25 according to the current value from current detecting part 22 and rotor position detecting sensor 26.Obtain air mass flow from the execution of these values, and under the constant air flow, carry out work according to this air mass flow.

In addition, to constant vacuum down and constant revolution work down, usefulness pressure sensor 27 and rotor position detecting sensor 26 are controlled respectively.

According to said structure,,, change the work suction properties of vacuum cleaner then according to the variation of condition of work as the variation of the condition of work of vacuum cleaner 1 all the time the current value that monitors vacuum, air mass flow and Brushless DC motor 25.

To explain another embodiment of vacuum cleaner of the present invention according to accompanying drawing below.

Explain vacuum cleaner below with reference to Figure 19-Figure 22 with improved Brushless DC motor, Figure 19 be the speed control unit total with key-drawing, show the speed control unit that comprises Brushless DC motor 36 and unsteady flow control device 31.

Figure 20 and Figure 21 are to use copped wave control system current transformer to drive the suction properties curve map of Brushless DC motor 36 as the vacuum cleaner of drive unit, and Figure 22 is the suction properties curve map that has according to the vacuum cleaner of input power limitation function of the present invention.

In Figure 19, show the total of speed control unit, current transformer control device 31 obtains DC voltage Ed by rectification circuit 33 and smoothing circuit 34 from AC power 32, and it is supplied with converter plant 35.

Converter plant 35 is 120 ° of resistor-type converters that comprise transistor T R1-TR6 and backflow diode D1-D6.By the received pulse width modulated, according to the ac output voltage of the copped wave operation control switch 35 of the conduction voltage side (120 ° of conduction angles) of the transistor T R1-TR3 of the positive voltage side of DC voltage Ed.

In addition, small resistor R1 is connected between the public positive terminal of the public emitter terminal of transistor T R4-TR6 and backflow diode P4-P6.Brushless DC motor 36 comprises and has ambipolar permanent magnet as the rotor 36a in magnetic field be inserted with the stator of rotor coil 36b.The coil current that flows in rotor circle 36b also flows to small resistor R1, and detects the load current I of Brushless DC motor 36 according to the voltage drop on the small resistor R1 _D

The control circuit of control Brushless DC motor 36 speed has the CPU of comprising, the microcomputer 37 of ROM and RAM is by the position of magnetic pole testing circuit 39 from element 38 received output power detection rotor 36a position of magnetic poles, according to the voltage drop detection load current I on the small resistor R1 _D Current detection circuit 40, the base drive device 41 of driving transistors TR1-TR6 and standard speed is sent to the speed command circuit 42 of microcomputer 37.

Current detection circuit 40 detects load current I by the voltage drop that receives on the small resistor R1 _DAnd form current detection signal 40S by the A/D converter (not shown).

Among the described ROM in microcomputer 47, store and drive Brushless DC motor 36 needed various handling procedures, for example speed is carried out handling procedure, order received processing program and speed control handling procedure.

In addition, comprise storage area among the described RAM in microcomputer 47, be used to receive the needed data of the various above-mentioned handling procedures of various execution.

Transistor T R1-TR6 receives enabling signal 37S from microcomputer 37, and is driven by base drive device 41.

Voltage commands circuit 43 forms a chopping signal.That is to say, in Brushless DC motor 36, flow to of the output torque of the coil current of rotor coil 36b, and, therefore, can carry out successive control the output torque at each turned position control coil electric current corresponding to this Brushless DC motor 36.

Figure 20 is the suction properties curve of Brushless DC motor 36 as the vacuum cleaner of drive source.Its transverse axis is the air mass flow Q that flows through vacuum cleaner, the longitudinal axis static pressure of vacuum cleaner suction force that drawn, the revolution N of Brushless DC motor 36 and input power W ₁

The range of movement of vacuum cleaner is put Q32 from largest motion point Q31 to minimum movement, near the largest motion point Q31 corresponding to the dust absorption nozzle mouth away from by the situation of the cleaning face of dust suction.At this moment, it needs maximum power.

In addition, as shown in figure 21, can obtain optimal suction properties on demand, that is to say, according to each curve and the map function control suitably selected corresponding to multiple revolution, as shown in figure 20 as the combination of suction properties parameter substantially vacuum cleaner.

Yet, have a look at input power W ₁Limited case, from the angle of the current capacity of control module and temperature rise etc., greater than allowing input power upper limit W ₁Scope in to use be not so good.

For example, be N when on this aspect of air mass flow Q33, selecting revolution ₁, and input power W ₁Surpass and allow input power upper limit W ₁, just overload situations will appear.

As above-mentioned input power W ₁Greater than allowing input power upper limit W ₁The time, the handling procedure with control device is reduced to revolution N to the revolution bid value ₂Or revolution N ₃, just can avoid the generation of overload situations.Yet on the other hand, it has a shortcoming, i.e. the handling procedure of the control device more complicated that becomes.

In addition, also can use special overload supervisory device, yet, adopt this device, exist expense to rise or the big shortcoming of device volume.

In this embodiment of the present invention, as the actual scope of application of vacuum cleaner, its target be air mass flow Q33 in the non-dust suction situation when dust absorption nozzle rises in the scope of air mass flow Q31, do not need to produce suction force greater than required power.Therefore, among this embodiment of the present invention, near above-mentioned scope, can automatically limit input power W ₁

That is to say that the rotation corresponding to rotor 36a on above-mentioned rotor coil 36 parts produces counter electromotive force.As shown in figure 22, the coil number of the magnetomotive gesture of rotor 36a and rotor coil 36b is provided with to such an extent that make supply voltage balance counter electromotive force.And, be provided with them to such an extent that make the air mass flow Q of 100% duty factor loading situation become air mass flow Q34.

Therefore, in the side of the big air mass flow Q that compares with air mass flow Q34, revolution N4 reduces input power W gradually from the bid value that load increases ₁Increase also saturated gradually.Therefore, can be with importing upper limit W less than allowing ₁Predetermined value automatically control input power W ₁Increase.

As mentioned above, even when being operated under any speed command value, greater than 100% big load one side, also can automatically limit input power W in copped wave control duty factor ₁Increase.

In addition, even when the high speed bid value exported unusually owing to speed command circuit 42 and microcomputer 37, still can automatically prevent unusual high speed operation in Brushless DC motor 36 1 sides of electric device.

Claims (17)

1. A vacuum cleaner comprising a detection device for detecting variable parameters such as static pressure, air flow and current that vary with the work of the dust suction nozzle; and a control device for detecting corresponding to the detection device Quantitative control of the suction characteristics of the electric drive fan motor, characterized in that: When the dust suction nozzle is placed on the dust-suctioned cleaning surface, the control device increases the suction characteristic parameter; When the suction nozzle leaves the surface being vacuumed, the control device reduces the suction characteristic parameter; and When the suction nozzle stops working for more than a predetermined time, the control device reduces the suction characteristic parameter to a predetermined suction characteristic parameter. 2. The vacuum cleaner according to claim 1, wherein said control means sets an upper limit value for increasing the suction characteristic parameter and a first lower limit value for decreasing the suction characteristic parameter. 3. The vacuum cleaner according to claim 1, characterized in that the control device gradually increases the suction characteristic parameter by a corresponding predetermined amount when the suction nozzle is working every predetermined time, when the suction nozzle When not working, the suction characteristic parameter is gradually reduced by a corresponding predetermined amount. 4. The vacuum cleaner according to claim 3, wherein said control means sets an upper limit value for increasing the suction characteristic parameter and a lower limit value for decreasing the suction characteristic parameter. 5. The vacuum cleaner according to claim 2, characterized in that, when there is no suction nozzle within a predetermined period of time, the control device reduces the suction characteristic parameter to the second lower limit value, making it become A predetermined lower puff characteristic parameter greater than the first lower limit value. 6. The vacuum cleaner of claim 1, wherein said predetermined increase is proportional to the number of nozzle operations. 7. The vacuum cleaner according to claim 1, wherein said control means increases the suction characteristic parameter to a value proportional to the operation number of the suction nozzle or to a predetermined suction characteristic parameter function . 8. The vacuum cleaner according to claim 7, wherein said control means sets an upper limit value for increasing the suction characteristic parameter and a lower limit value for decreasing the suction characteristic parameter. 9. A vacuum cleaner with multiple interchangeable nozzles, characterized in that a control device presets the range of air flow actually used by the nozzles, and changes and selects a suitable one when changing the nozzles. The air flow range of the corresponding nozzle. 10. The vacuum cleaner according to claim 9, characterized in that, the control device sets a plurality of upper limits of the air flow corresponding to the opening sizes of the plurality of nozzles, and when the air flow condition exceeds that of the nozzles The corresponding upper limit value is to reduce the suction characteristic parameter. 11. The vacuum cleaner according to claim 10, characterized in that, a nozzle judging device is based on the detected change range and state of changes caused by the operation of the dust nozzle, such as static pressure, air flow, current, etc. Distinguish the type of the dust suction nozzle; an air flow value changing device changes the upper limit value of the control air flow according to the signal of the dust suction nozzle discrimination device. 12. The vacuum cleaner according to claim 11, wherein said control means controls the suction characteristic parameter corresponding to the position determined by said air flow value changing means when it is less than said control air flow upper limit value. Predetermined suction characteristic parameters. 13. A vacuum cleaner with multiple interchangeable suction nozzles, characterized in that it is provided with an air flow detection device for controlling the electric drive fan motor according to the value detected by the air flow detection device detecting the suction air flow during cleaning; and a control device setting a plurality of upper and lower limit values of the air flow flow corresponding to the opening sizes of the plurality of suction nozzles, so that when the air flow exceeds the corresponding The suction characteristic parameter is reduced when the upper limit value and the corresponding lower limit value of a plurality of suction nozzles are lowered. 14. A vacuum cleaner, comprising an electric-driven fan motor; a detection device for detecting changes in working conditions of the vacuum cleaner; and a control device for controlling the electric-driven fan according to the value detected by the detection device, characterized in that the The control device controls the suction characteristic parameter according to the change of the working condition of the vacuum cleaner detected by the load variation during the reciprocating movement of the dust suction nozzle on the cleaned surface. 15. The vacuum cleaner according to claim 14, characterized in that, the control device is based on the operating characteristic parameters representing constant air flow, constant vacuum degree operating characteristic parameters, and the constant vacuum rotation speed operating characteristic parameters of the electric drive fan motor. Multiple suction parameters combined with the three and the detected changes in the working conditions of the vacuum cleaner according to the load changes during the reciprocating movement of the suction nozzle on the cleaned surface are automatically selected and changed. Multiple suction characteristic parameters. 16. The vacuum cleaner according to claim 14 or 15, characterized in that, the control device detects the vacuum cleaner caused by the fluctuation width of the vacuum pressure variation of the vacuum cleaner and the load fluctuation during the operation of the dust suction nozzle. Changes in the working conditions of the electric drive fan motor caused by changes in the load and the current variation of the electric drive fan, change a plurality of suction characteristic parameters, and compare the variation width with the predetermined threshold value set on each suction characteristic parameter Compare. 17. The vacuum cleaner of claim 1, wherein the electrically driven fan motor is a brushless DC motor with a chopper controlled duty cycle 100% operating area.

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