JP2011024745A - Vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the followability of detection to the change of a surface to be cleaned, in a vacuum cleaner for indexing the easiness of removing dust on the surface to be cleaned by using a dust sensor and changing an energization amount to an electric blower. <P>SOLUTION: The vacuum cleaner is provided with the dust sensor 8 for detecting dust passing through an intake path, sums up the output values of the dust sensor 8 per unit time at each prescribed cycle, indexes the easiness of removing the dust on the surface to be cleaned from the summed-up result, and changes the energization amount to the electric blower 2 corresponding to the index. In the vacuum cleaner, a floor separation detection means 11 for detecting that a suction tool is separated from the surface to be cleaned is provided; the output data of the dust sensor 8 stored until then are reset once when the suction tool is tentatively separated from the surface to be cleaned and is grounded again or when an operation is started; the index is calculated in a cycle shorter than usual for the prescribed period of time thereafter, and the followability of the detection to the change of the surface to be cleaned is improved. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to control of a vacuum cleaner used for cleaning in a general home or the like, and more particularly, to a state detection technique of a floor surface (surface to be cleaned).

  Conventionally, floor surface detection using a dust sensor counts the dust sensor output per unit time for each predetermined period, and indexed the ease of removing dust on the surface to be cleaned from the result (hereinafter referred to as “floor”). Is called a “surface index”) to estimate the state of the floor surface, which mainly estimates the state of the floor surface from the rate of decrease in the amount of dust with respect to the cleaning time (for example, see Patent Document 1) There are known ones that estimate the state of the floor surface from the dust distribution density (see, for example, Patent Document 2).

Japanese Patent No. 3184276 JP-A-4-327818

  In an actual cleaning environment, dust is locally distributed. Therefore, in order to accurately detect the state of the floor, the calculation period of the floor index is set long (about 5 seconds). There is a need.

  Therefore, in the conventional method, at the start of operation, the movement of the cleaning place, for example, moving from flooring to sloppy, and vice versa, the problem that the tracking of the floor index is delayed, When cleaning the area mat, etc., and frequently grounding / leaving the suction tool, the output of the dust sensor is not stable and the wrong floor index is calculated. It was.

  The present invention solves the above-mentioned conventional problems, and at the time of starting operation or moving to a cleaning place, quickly follows the floor index, and is accurate even when the suction tool is frequently grounded / leaved. An object of the present invention is to provide a highly usable vacuum cleaner capable of calculating a floor index.

  In order to solve the above-described conventional problems, the vacuum cleaner of the present invention is provided with a bed detection means for detecting that the suction tool is separated from the surface to be cleaned, and the suction tool is once separated from the surface to be cleaned. When grounded again or at the start of operation, the dust sensor output data accumulated so far for calculating the floor index is once reset, and then the floor index calculation is shorter than usual for a predetermined time. It is something that is done in.

  This improves the floor index followability at the start of operation.

  Also, when moving to a different cleaning surface (especially from flooring to carpet), the suction tool is separated from the surface to be cleaned due to a step or a gap existing at the boundary of the cleaning surface. At that time, the output value up to that time is reset, and then the floor index is calculated for a predetermined period of time and in a short cycle, so that the followability of the floor index when moving to the cleaning place is improved.

  In addition, since the floor index is calculated in a short cycle, if the destination is a place where there is a lot of dust locally in the movement to the flooring, the floor index should be higher (the floor surface where dust is difficult to remove). ), But the correct floor index can be calculated immediately after the dust in the area is sucked in, and the electric blower is energized in a locally dusty place where it is difficult to remove dust. It can be said that the amount is the same, i.e., both of them do not give a sense of incongruity even if the energization amount is temporarily increased in order to improve the dust collecting performance, but rather it is a control that matches the actual feeling of cleaning.

  The vacuum cleaner of the present invention has a floor index higher when the floor index is high (it is difficult to remove dust on the surface to be cleaned) than when the floor index is low (it is easy to remove dust on the surface to be cleaned). Is calculated in a short cycle.

  When moving from a thin carpet to a flooring, the suction tool may not be able to be detected due to the fact that the suction tool does not leave the surface to be cleaned or the time it takes to leave is short.

  On the other hand, when cleaning the surface to be cleaned with a low floor index, if the floor index is calculated in a short cycle, the floor index is erroneously increased to the higher side due to local dust distribution as described above. As a result, the floor index increases and decreases repeatedly, and the amount of current supplied to the electric blower also fluctuates intermittently accordingly.・ I feel uncomfortable.

  However, according to the present invention, it is possible to improve the followability of the floor index more than before even when the suction tool is moved from the carpet to the flooring without causing the false detection as described above. Can do.

  Note that when cleaning a surface to be cleaned with a high floor index, the output of the dust sensor will not decrease so much unless the same place is continuously cleaned for a long time. However, it is not wrong to calculate the floor index to the lower side.

  The present invention detects the movement of the cleaning place by detecting that the suction tool is separated from the surface to be cleaned, and resets the dust sensor output value so far, and then the floor index for a predetermined time. Improves the followability of the floor index to changes in the floor surface by setting the calculation cycle to a short cycle, etc.Furthermore, depending on how often the suction tool is separated from the surface to be cleaned, the suction tool is separated from the surface to be cleaned. The floor index detection accuracy can be improved by excluding the dust sensor output during the operation, etc., so that the power of the vacuum cleaner can be switched quickly according to the cleaning location. A highly efficient vacuum cleaner can be provided.

The circuit block diagram of the vacuum cleaner in Embodiment 1 of this invention Same perspective view of vacuum cleaner The principal part sectional view showing the composition of the dust sensor of the vacuum cleaner Same as above, output waveform diagram of dust sensor of vacuum cleaner Same as above, control flowchart of vacuum cleaner

1st invention is the vacuum cleaner main body which has an electric blower, the suction tool which is connected with the said vacuum cleaner main body via a hose etc., and attracts | sucks the dust of a to-be-cleaned surface, the said electric blower, and the said suction tool. And a dust sensor configured to detect dust passing through the intake passage by the light emitting means and the light receiving means, and the output value of the dust sensor per unit time is set for each predetermined period. And indexing the ease of removing dust on the surface to be cleaned.
The floor is an electric vacuum cleaner that changes the energization amount to the electric blower according to the floor index, and further detects that the suction tool is separated from the surface to be cleaned. When the suction tool is once separated from the surface to be cleaned and grounded again, the dust sensor output data accumulated so far for calculating the floor index is temporarily reset and a predetermined time after grounding is provided. During this period, the floor index is calculated at a cycle shorter than usual.

  When moving to a different cleaning surface (especially from flooring to carpet), the suction tool is separated from the surface to be cleaned due to a step or a gap existing at the boundary of the cleaning surface.

  According to the present invention, when the cleaning place is moved, it is detected that the suction tool has moved away from the surface to be cleaned, the output data is reset at that time, and then the floor surface for a predetermined time and in a short cycle. Since the index is calculated, the followability of the floor index when moving to the cleaning place is improved.

  Since the floor index is calculated in a short cycle, if the destination is a place where there is a lot of dust locally when moving to the flooring, the floor index is higher (the floor surface where dust is difficult to remove). ), The correct floor index can be calculated immediately after the dust in the area is sucked in, and the electric blower can be used in areas where there is a lot of dust and floors where dust is difficult to remove. It can be said that the energization amount is the same, i.e., both have a sense of incongruity even if the energization amount is temporarily increased in order to improve the dust collection performance, but rather it is a control that matches the actual cleaning feeling.

  2nd invention is connected with the said vacuum cleaner main body through a hose etc. with the electric vacuum cleaner main body which has an electric blower, the suction tool which attracts | sucks the dust of a to-be-cleaned surface, the said electric blower, and the said suction tool, And a dust sensor configured to detect dust passing through the intake passage by the light emitting means and the light receiving means, and the output value of the dust sensor per unit period is set for each predetermined period. From the result of the counting, the ease of removing dust on the surface to be cleaned is indexed (hereinafter referred to as the “floor surface index”), and the energization amount to the electric blower is determined according to the floor surface index. A vacuum cleaner to be changed, and further provided with a floor detection means for detecting that the suction tool is separated from the surface to be cleaned, and when the operation is started with the suction tool being grounded to the surface to be cleaned, For a predetermined time from the start of the floor index It exits a vacuum cleaner, which comprises carrying out in a shorter period than usual.

  As a result, the floor index followability at the start of operation is improved as in the first invention.

  In addition, because the floor index is calculated in a short cycle, if you accidentally start operation on a flooring in a place where there is a lot of dust, the floor index will be incorrectly set to the higher side (floor surface where it is difficult to remove dust). The correct floor index can be calculated immediately after inhaling the dust at the location, and the electric blower energization is the same at the location where there is a lot of dust and the floor where dust is difficult to remove. That is, in both cases, even if the energization amount is temporarily increased to improve the dust collection performance, there is no sense of incongruity, but rather it is a control that matches the actual cleaning feeling.

  3rd invention is the vacuum cleaner main body which has an electric blower, the suction tool connected with the said vacuum cleaner main body via a hose etc., and attracting | sucking the dust of a to-be-cleaned surface, the said electric blower, and the said suction tool, And a dust sensor configured to detect dust passing through the intake passage by the light emitting means and the light receiving means, and the output value of the dust sensor per unit period is set for each predetermined period. From the result of the counting, the ease of removing dust on the surface to be cleaned is indexed (hereinafter referred to as the “floor surface index”), and the energization amount to the electric blower is determined according to the floor surface index. This vacuum cleaner changes the floor index when the floor index is high (it is difficult to remove dust on the surface to be cleaned) than when the floor index is low (it is easy to remove dust on the surface to be cleaned). Electric cleaning characterized by performing calculation in a short cycle It is.

  When moving from a thin carpet to a flooring, the suction tool may not be able to be detected due to the fact that the suction tool does not leave the surface to be cleaned or the time it takes to leave is short.

  On the other hand, when cleaning the surface to be cleaned with a low floor index, if the floor index is calculated in a short cycle, the floor index is erroneously increased to the higher side due to local dust distribution as described above. As a result, the floor index increases and decreases repeatedly, and the amount of current supplied to the electric blower also fluctuates intermittently accordingly.・ I feel uncomfortable.

  According to the present invention, only when the floor index is high, the floor index is calculated in a short cycle, so that the false detection as described above does not occur, and the carpet, that is, from the place where the floor index is high, Even when the suction tool is not accompanied by leaving the floor during the movement to the flooring, the followability of the floor index can be improved as compared with the prior art.

  Note that when cleaning a surface to be cleaned with a high floor index, the output of the dust sensor will not decrease so much unless the same place is continuously cleaned for a long time. However, it is not wrong to calculate the floor index to the lower side.

  According to a fourth aspect of the present invention, when the suction tool is moved away from the surface to be cleaned between the suction tool grounding of the first or second invention, that is, from the reset of the dust sensor output data to the first floor index calculation. If the grounding device is grounded again within the second predetermined time, the suction tool is separated from the surface to be cleaned without resetting the dust sensor output data accumulated so far for calculating the floor index. In this case, only the dust sensor output value is excluded, and the floor surface index calculation process is continuously performed after the ground contact.

  For example, when cleaning a place where the suction tool is adsorbed, such as an area mat, it is difficult to perform cleaning while maintaining the suction tool in contact with the surface to be cleaned. Cleaning is performed by pressing one end, grounding the suction tool on the forward path, and lifting the suction tool on the return path. Since the suction tool is frequently separated from the surface to be cleaned, the output data of the dust sensor is reset each time in the above-described invention, and the floor index may not be calculated forever. If the forward path time is longer than the floor index calculation period, the floor index can be calculated, but when the return path, that is, when the suction tool is away from the surface to be cleaned, the output value of the dust sensor is Since it differs from the amount of dust on the cleaning surface, an incorrect floor index will be calculated if used for calculating the floor index.

  According to the present invention, the dust sensor output data is not repeatedly reset even when the suction pad is frequently moved to the cleaning surface such as an area mat, which is repeatedly grounded and left. Since the floor index is calculated by excluding data in which the output of is unstable, the floor index can be quickly followed without calculating the wrong floor index.

  The fifth invention does not reset the dust sensor output data at the time of ground contact when the suction tool of the first or second invention is separated from the surface to be cleaned for less than the third predetermined time. Further, the floor surface index calculation process is continuously performed after the ground contact except for the dust sensor output value while the suction tool is separated from the surface to be cleaned. It is a vacuum cleaner of description.

The difference from the fourth invention is that the condition for performing the series of processing is “before the first floor index calculation” in the fourth invention, whereas “the bed leaving time is the third time in the fifth invention”. It is only a point of “less than a predetermined time”.

  As a result, even when the ground mat and the floor of the suction tool are frequently repeated, such as an area mat, the floor surface index is calculated with higher accuracy than in the past, and the normal surface to be cleaned is cleaned, The floor index can be updated each time.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 2 is an overall perspective view of the electric vacuum cleaner according to the first embodiment of the present invention. In FIG. 2, the vacuum cleaner main body 21 is provided with an electric blower chamber 22 containing the electric blower 2 at the rear, a dust collection chamber 23 for collecting dust is arranged at the front, and the front of the vacuum cleaner main body 21. Is provided with an intake port 26 to which a connection pipe 25 provided at one end of the hose 24 is detachably connected. The other end of the hose 24 is provided with a tip pipe 28 having a handle 27 having an operation part 9 for operating the cleaner body 21 while holding it during cleaning. The operation unit 9 includes an “OFF” button 9a (not shown) and an “RUN” button 9b (not shown) as operation means. Reference numeral 29 denotes a telescopic extension pipe, the downstream end of which is detachably connected to the tip pipe 28, and the other end incorporates a rotary brush 30 for collecting dust and an electric motor 10 that rotationally drives the rotary brush 30. The suction tool 31 is detachably connected. With the above configuration, by operating the operation unit 9 and driving the electric blower 2, dust on the surface to be cleaned sucked by the suction tool 31 passes through the extension pipe 29 and the hose 24 to the cleaner main body 21. The dust is transported and repaired in a dust collection chamber 23 built in the cleaner body 21, and the suction air is discharged to the outside from the rear of the cleaner body 21. In addition, a power cord 13 is provided at the rear of the cleaner body 21 to connect to an outlet (commercial power supply) and supply power to a circuit board 32a (not shown) built in the cleaner body 21. It has been. Further, a bed leaving detecting means 11 constituted by a limit switch that is turned on only when the suction tool 31 is grounded to the surface to be cleaned is disposed on the bottom surface of the suction tool 31. Denoted at 8 is a dust sensor for detecting the amount of sucked dust, and is provided on the connecting pipe 25. As shown in FIG. 3, the dust sensor 8 includes an infrared light emitting diode 15 as a light emitting means and a phototransistor 16 as a light receiving means provided opposite to the infrared light emitting diode 15 to be cleaned. When the dust sucked from the surface passes between the infrared light emitting diode 15 and the phototransistor 16, the dust is blocked by the infrared light emitted from the infrared light emitting diode 15, so that the output of the phototransistor 16 is increased. By utilizing this change, dust is detected.

  Next, the configuration of the control circuit will be described with reference to FIG. Each block 32a, 32b, and 32c on the circuit diagram is arranged in the cleaner body 21, the hose 24, and the suction tool 31, respectively. The commercial power supply 1 is connected to a zero cross detection circuit 3 for detecting a zero cross of a power waveform, a power supply circuit 5 for supplying power to the signal control means 4, an electric blower 2, and an electric motor 10. The electric blower 2 and the electric motor 10 are configured to be phase-controlled by the signal control means 4 via a drive circuit A6 and a drive circuit B7, respectively. The phase control angle at this time is determined in accordance with a floor index to be described later and an output signal of the dust sensor 8. The zero-cross detection circuit 3 necessary for performing phase control is connected to the signal control means 4. As a circuit of the dust detection unit, an amplification circuit 17 for amplifying the output of the phototransistor 16 and pulse conversion means 18 are provided. The amplification circuit 17 and the pulse conversion means 18 are connected to the infrared light emitting diode 15 and It is set so that a pulse is output when dust having a diameter of 70 μm or more passes between the phototransistors 16. Further, the bed leaving detection unit 11, the operation unit 9, and the pulse conversion unit 18 are electrically connected to the signal control unit 4.

  About the vacuum cleaner comprised as mentioned above, the operation | movement and an effect | action are demonstrated below using the control flowchart shown in FIG.

  When the commercial power supply 23 is turned on, that is, when the user inserts the power plug (not shown) of the power cord (not shown) of the vacuum cleaner into the outlet (not shown), the electric blower 2 stops. It is a state.

  In step 1, the operation status of the operation unit 9 is confirmed. If the “RUN” button 9b is pressed, the electric blower 2 is operated. If the “OFF” button 9a is pressed, the electric blower 2 is operated. Stop.

  Next, in step 2, it is determined whether or not the vehicle is in operation. If the operation is stopped, all output data of the dust sensor 8 is reset, and at the start of the next operation, preparation for shortening the floor index calculation cycle is performed. Then, reset the floor detected flag and set timer A to 5 seconds. If in operation, go to step 3. The floor surface detected flag is a flag indicating whether the first floor surface index calculation has been completed after the suction tool 31 is grounded, that is, the output value of the dust sensor 8 is reset, and the timer A has a floor surface index calculation cycle. Is a countdown timer for counting the remaining time of the time to shorten the time ("predetermined time" in claims 1 and 2).

  In step 3, the suction tool 31 is grounded to the surface to be cleaned (hereinafter referred to as “landing”) or separated from the surface to be cleaned (hereinafter “bed off”) from the output of the bed detection means 11. If it is a bed leaving, the floor timer for counting the bed leaving time is counted up, and the floor surface index is calculated by excluding the output value of the dust sensor 8 during bed leaving after landing. As a preparation for performing the operation, the 0.1 second timer and the number of output pulses of the dust sensor 8 for 0.1 second are reset. If it is a landing state in step 3, it will progress to step 4 and will calculate a floor index etc. Note that the count (integration) of the number of output pulses of the dust sensor 8 is always performed, and the number of pulses every 0.1 second is totaled after Step 10 described later.

  Steps 4 and after are portions that are processed only when landing. First, in step 4, it is determined whether or not the floor detected flag is set.

  If the floor detection completed flag is set, it is determined in step 5 whether the bed leaving time is 0.5 seconds or longer. If it is 0.5 seconds or longer ("third predetermined time" in claim 5), By setting the timer A to 5 seconds and resetting each timer and count for calculating the floor index, the next step 7 is to set the floor index determination period to 1 second for 5 seconds. Make preparations. If the bed leaving time is less than 0.5 seconds, the floor index determination cycle is as usual.

  If the floor detected flag is not set in step 4, it is determined in step 6 whether the bed leaving time is 2 seconds or longer. If it is 2 seconds or longer ("second predetermined time" in claim 4), Set the timer A to 5 seconds and reset the timers and counts for calculating the floor index to prepare for setting the floor index determination period to 1 second in the next step 7 for 5 seconds. I do. If the bed leaving time is less than 2 seconds, the floor index determination cycle is as usual.

  Further, when the timer A is 0 in step 7, that is, when the time for shortening the floor index determination period (“predetermined time” in claims 1 and 2) is exceeded, the floor is determined in step 8 according to the floor index. The surface index judgment cycle is switched. That is, when the floor index is high (it is difficult to remove dust on the surface to be cleaned), the floor index calculation cycle is set to 2.5 seconds, and the floor index is low (to easily remove dust on the surface to be cleaned). In the state, the floor index calculation cycle is set to 5 seconds.

In step 9, the floor timer is reset, the 0.1 second timer for counting the number of pulses of the dust sensor 8 and the floor timer for counting the floor index calculation timing are counted up, and the floor index calculation cycle is shortened. The timer A counts down to measure the remaining time of the time ("predetermined time" in claims 1 and 2).

  Step 10 and the subsequent steps are totaling processing of output pulses of the dust sensor 8.

  If the 0.1 second timer has reached 0.1 seconds in step 10, the process proceeds to step 11. For this reason, the processing after step 11 is processed every 0.1 seconds.

  In steps 11 and 12, the counter A and the counter B are counted up in response to the output pulse of the dust sensor 8 for 0.1 seconds. Counter A stores the number of times that the number of pulses in 0.1 seconds was 2 or more, and counter B stores the number of times that the number of pulses in 0.1 seconds was 3 or more.

  In step 13, the control phase angle of the electric blower 2 is set according to the table shown in the following table according to the number of pulses for 0.1 second and the floor index. The higher the number of pulses (the more dust is on the surface to be cleaned), and the higher the floor index (the more difficult it is to remove the dust on the surface to be cleaned), the lower the phase angle, the higher the power. Yes.

  In step 14, the floor timer is compared with the floor index calculation cycle set in step 7 to determine whether it is the timing of calculating the floor index, and if it is the floor index calculation timing, After calculating the floor index, the timer and counter are reset in step 15 and the floor detected flag is set, and the process returns to step 1.

  The floor index is calculated as follows.

  First, the values of the counter A and the counter B at the floor index calculation timing are corrected based on the following formula.

Counter A (correction value) = value of counter A × (5 seconds ÷ floor surface index calculation cycle)
Counter B (correction value) = value of counter B x (5 seconds / floor index calculation cycle)
As can be seen from the above equation, the correction value of each counter is the counter value between floor index calculation cycles,
It is a value calculated by proportional calculation so as to correspond to the counter value for 5 seconds.

  Next, the floor index is calculated according to the correction values of the counters A and B and the table shown in the table below.

  As shown in FIG. 4, on the flooring, even if there is a local distribution of dust, the dust is removed in a short time, so the number of pulses tends to increase once and then immediately decrease. Above, there is a tendency for the absolute value of the number of pulses to be higher than that of flooring due to the fact that there is a lot of unwanted hair originally or dust has penetrated to the back of the carpet and it takes a long time to remove the dust. is there.

  Since the method of calculating the floor index from the values of the counts A and B is already known, the details are omitted, but in order to calculate the floor index accurately using the characteristics of each floor described above. In general, a method of calculating the floor index based on the frequency of occurrence of the number of pulses equal to or greater than a predetermined value, not the absolute value of the number of pulses.

  As described above, in the present embodiment, when the bed leaving / detecting state of the suction tool 31 is detected by the bed leaving detection unit 11 and the suction tool 31 is once separated from the surface to be cleaned and grounded again, The output data (counters A and B) of the dust sensor 8 accumulated so far for calculating the floor index is temporarily reset, and the floor index is calculated for 1/5 (1) Therefore, the tracking performance of the floor index is improved as compared with the conventional one when moving to a different cleaning surface.

  Since the floor index is calculated in a short cycle, if the destination is a place where there is a lot of dust locally when moving to the flooring, the floor index is higher (the floor surface where dust is difficult to remove). ), The correct floor index can be calculated immediately after the dust in the area is sucked in, and the electric blower can be used in areas where there is a lot of dust and floors where dust is difficult to remove. It can be said that the energization amount is the same, i.e., both have a sense of incongruity even if the power is temporarily increased to improve the dust collection performance, but rather the control is suitable for the actual cleaning.

  Also, when the operation is started with the suction tool 31 being grounded to the surface to be cleaned, or when the suction tool 31 is grounded to the surface to be cleaned for the first time after the operation is started, the operation is started for 5 seconds. In addition, since the calculation of the floor index is performed with a normal 1/5 (1 second) cycle, the floor index compliance at the start of operation is also improved.

Also, in normal conditions, when the floor index is high (it is difficult to remove dust on the surface to be cleaned), half of the floor index is low (it is easy to remove dust on the surface to be cleaned) (2.5 seconds). The floor index is calculated at a cycle of the above-mentioned, so that the suction tool can be used when moving from a carpet, that is, a place with a high floor index, to a flooring while preventing erroneous calculation of the floor index, which is likely to occur in flooring. 31
Even when the floor is not accompanied, the followability of the floor index can be improved as compared with the conventional case.

  Note that when cleaning the surface to be cleaned with a high floor index, the output of the dust sensor 8 does not decrease much unless the same place is continuously cleaned for a long time, so even if the floor index is calculated in a short cycle. However, the floor index is not calculated by mistake.

  In addition, it is determined whether or not the first floor index calculation has been completed when the suction tool 31 leaves the floor → landing based on the floor surface detected flag, and the timing of leaving the floor → landing before the first floor index is calculated. When the bed leaving time is within 2 seconds, the suction tool 31 is separated from the surface to be cleaned without resetting the output data of the dust sensor 8 accumulated so far for calculating the floor index. Since only the output value of the dust sensor 8 is excluded and the floor surface index calculation process is continuously performed after the grounding, the cleaning of the suction tool 31 such as an area mat is frequently repeated. Even when moving to the surface, the output data of the dust sensor 8 is not repeatedly reset, and the floor index is calculated by excluding data when the floor is leaving, that is, the output of the dust sensor 8 is unstable. So wrong You can follow quickly floor index without calculating the plane index.

  When the suction tool 31 is separated from the surface to be cleaned for less than 0.5 seconds, the suction tool 31 is not cleaned without resetting the output data of the dust sensor 8 at the time of ground contact. Since only the output value of the dust sensor 8 while being separated from the floor is excluded and the floor surface index calculation process is continuously performed after the grounding, the grounding / leaving of the suction tool 31 such as an area mat is frequently repeated. Even in this case, the floor index can be calculated more accurately than before, and the floor index can be updated each time as in the case of cleaning a normal surface to be cleaned.

  As described above, the vacuum cleaner according to the present invention can be applied to various types of vacuum cleaners for business use and central cleaners as well as home use.

DESCRIPTION OF SYMBOLS 1 Commercial power supply 2 Electric blower 3 Zero cross detection circuit 4 Signal control means 5 Power supply circuit 6 Drive circuit A
7 Drive circuit B
DESCRIPTION OF SYMBOLS 8 Dust sensor 9 Operation part 9a "Off" switch 9b "Driving" switch 10 Electric motor 11 Bed leaving detection means 13 Power cord 15 Infrared light emitting diode 16 Phototransistor 17 Amplifying circuit 18 Pulse conversion means 21 Vacuum cleaner main body 22 Electric blower chamber 23 Collection Dust chamber 24 Hose 25 Connection pipe 26 Air inlet 27 Handle 28 End pipe 29 Extension pipe 30 Rotating brush 31 Suction tool 32a-32c Circuit board

Claims (5)

A vacuum cleaner body having an electric blower, connected to the vacuum cleaner body via a hose and the like, provided between the suction tool for sucking dust on the surface to be cleaned, and between the electric blower and the suction tool; A dust sensor configured to be able to detect dust passing through the intake passage by the light emitting means and the light receiving means, and the output value of the dust sensor per unit time is totaled every predetermined period, and the total From the results, indexing the ease of removing the dust on the surface to be cleaned (hereinafter referred to as "floor surface index"), in a vacuum cleaner that changes the amount of electricity to the electric blower according to the floor surface index, Further, a floor detection means for detecting that the suction tool is separated from the surface to be cleaned is provided, and when the suction tool is once separated from the surface to be cleaned and grounded again, it is accumulated so far for calculating the floor index. The dust sensor output Once reset chromatography data, and for a predetermined time after the ground, vacuum cleaner, characterized in that to calculate the floor index in a shorter period than usual. A vacuum cleaner body having an electric blower, connected to the vacuum cleaner body via a hose and the like, provided between the suction tool for sucking dust on the surface to be cleaned, and between the electric blower and the suction tool; A dust sensor configured to detect dust passing through the intake passage by the light emitting means and the light receiving means, and the output value of the dust sensor per unit period is totaled every predetermined period, and the total From the results, indexing the ease of removing the dust on the surface to be cleaned (hereinafter referred to as "floor surface index"), in a vacuum cleaner that changes the amount of electricity to the electric blower according to the floor surface index, Further, provided a bed detection means for detecting that the suction tool is separated from the surface to be cleaned, and when the operation is started in a state where the suction tool is grounded to the surface to be cleaned, for a predetermined time from the start of operation, Calculate floor index more than usual Vacuum cleaner, which comprises carrying out a short cycle. A vacuum cleaner body having an electric blower, connected to the vacuum cleaner body via a hose and the like, provided between the suction tool for sucking dust on the surface to be cleaned, and between the electric blower and the suction tool; A dust sensor configured to detect dust passing through the intake passage by the light emitting means and the light receiving means, and the output value of the dust sensor per unit period is totaled every predetermined period, and the total From the results, indexing the ease of removing the dust on the surface to be cleaned (hereinafter referred to as "floor surface index"), in a vacuum cleaner that changes the amount of electricity to the electric blower according to the floor surface index, When the floor index is high (it is difficult to remove dust on the surface to be cleaned), the floor index is calculated in a shorter cycle than when the floor index is low (it is easy to remove dust on the surface to be cleaned). A vacuum cleaner characterized by that. Suction tool grounding, that is, when the suction tool is separated from the surface to be cleaned between the reset of dust sensor output data and the first floor index calculation, and when grounded again within the second predetermined time. Without resetting the dust sensor output data accumulated so far for calculating the floor index, exclude only the dust sensor output value while the suction tool is separated from the surface to be cleaned, The vacuum cleaner according to claim 1 or 2, wherein the calculation process of the floor index is continuously performed later. If the suction tool is separated from the surface to be cleaned for less than a third predetermined time, the suction tool is separated from the surface to be cleaned without resetting the dust sensor output data at the time of ground contact. The vacuum cleaner according to claim 1 or 2, wherein only the dust sensor output value is excluded and the floor surface index calculation process is continued after the ground contact.