JP2012200462A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum cleaner capable of suggesting a timing when cleaning is necessary to a user.SOLUTION: The vacuum cleaner has a cleaner body that stores an electric blower 18. The vacuum cleaner has an air passage that communicates with the suction side of the electric blower 18. The vacuum cleaner has an optical sensor 53 for detecting a dust amount passing through the air passage by the drive of the electric blower 18. The vacuum cleaner has a cleaning state calculating part 57 that calculates the cleaning state of a cleaning area based on the dust amount detected by the optical sensor 53. The vacuum cleaner has display means 20 that displays a necessary cleaning frequency predicted by the cleaning state calculated by the cleaning state calculating part 57.

Description

  Embodiments of the present invention relate to a vacuum cleaner having an air passage communicating with a suction side of an electric blower.

  2. Description of the Related Art Conventionally, a vacuum cleaner includes a vacuum cleaner main body that houses an electric blower, and an air passage through which dust is sucked by driving of the electric blower communicates with a suction side of the electric blower. As such an electric vacuum cleaner, for example, a configuration that suggests the timing of the next cleaning in accordance with the cleaning frequency of each cleaning area set in advance is known.

  In general, the user determines the frequency of cleaning required for the cleaning area in accordance with the cleaning state of the cleaning area, that is, the degree of dirt (cleanliness). For example, when the cleaning area is not very dirty, in other words, when the amount of dust in the cleaning area is not so large, the user tends not to clean. Therefore, by knowing the degree of dirt in the cleaning area, the user can clean only when necessary, and convenience can be improved.

JP-A-8-9472

  The problem to be solved by the present invention is to provide a vacuum cleaner that can suggest to the user when cleaning is necessary.

  The vacuum cleaner of the embodiment has a vacuum cleaner body that houses an electric blower. Moreover, this vacuum cleaner has an air path connected to the suction side of the electric blower. Furthermore, this electric vacuum cleaner has a dust amount detection means for detecting the amount of dust passing through the air passage by driving the electric blower. The vacuum cleaner further includes a calculation unit that calculates a cleaning state of the cleaning area based on the amount of dust detected by the dust amount detection unit. And this vacuum cleaner has the alerting | reporting means which alert | reports the required cleaning frequency estimated from the cleaning state computed by the calculation means.

It is a block diagram which shows the internal structure of the vacuum cleaner of 1st Embodiment. It is a longitudinal cross-sectional view which shows a part of vacuum cleaner same as the above. It is a perspective view which shows a vacuum cleaner same as the above. It is a flowchart which shows the whole control of a vacuum cleaner same as the above. It is a block diagram which shows the internal structure of the vacuum cleaner of 2nd Embodiment. It is a flowchart which shows the whole control of a vacuum cleaner same as the above.

  The configuration of the first embodiment will be described below with reference to the drawings.

  In FIG. 3, reference numeral 11 denotes a so-called canister-type vacuum cleaner. The vacuum cleaner 11 includes a vacuum cleaner body 12 and an air passage forming body 13 which is a pipe portion detachably connected to the cleaner body 12. And have.

  The vacuum cleaner main body 12 includes a hollow main body case 15 that can swivel and run on the surface to be cleaned, and a main body dust collection chamber and an electric blower chamber (not shown) are partitioned in the front and rear in the main body case 15. Has been. Furthermore, an electric blower 18 is accommodated in the electric blower chamber, and the suction side of the electric blower 18 communicates with the main body dust collection chamber. Further, a dust collecting section such as a filter, a dust collecting bag, or a dust collecting device (dust collecting cup) is disposed in the main body dust collecting chamber. A main body suction port 19 is formed in the front portion of the main body case 15 so as to communicate with the main body dust collection chamber and to which the proximal end side of the air passage forming body 13 is connected. Further, a display unit 20 such as a liquid crystal panel as a notification unit is disposed on the upper part of the main body case 15.

  The air passage forming body 13 includes a long hose body 21, an extension pipe 22 that is detachably connected to the hose body 21, and a suction port body that is detachably connected to the extension pipe 22. A floor brush 23 is provided, and an air passage W communicating with the suction side of the electric blower 18 is formed inside. The air path forming body 13 can be used with the floor brush 23 removed, for example, or the floor brush 23 and the extension pipe 22 can be removed.

  The hose body 21 includes a long cylindrical hose body 25, a connecting pipe portion 26 formed in communication with the base end side (downstream end side) which is one end side of the hose body 25, For example, a hand operating part 27 for gripping operation of the air passage forming body 13 is formed integrally with the front end side (upstream end side) which is the end side.

  The hose body 25 is formed in a cylindrical bellows shape using a flexible synthetic resin or the like, and a wiring (not shown) that electrically connects the hand operating section 27 side and the cleaner body 12 side is provided inside and the air passage. It is attached to the outside of W in a spiral shape.

  The connecting pipe portion 26 is a portion that is inserted and connected to the main body suction port 19 and is formed in a cylindrical shape from a synthetic resin harder than the hose main body 25. In addition, a terminal (not shown) that is electrically connected to the wiring disposed in the hose body 25 is disposed in the connecting pipe part 26, and these terminals insert the connecting pipe part 26 into the main body suction port 19. By connecting, it is electrically connected to the cleaner body 12 side.

  Further, the hand operating portion 27 is formed in a substantially cylindrical shape with a synthetic resin harder than the hose body 25, and a gripping portion 37 gripped by the user protrudes from the upstream end side to the downstream end side. Is formed. A plurality of setting buttons 38 serving as setting means for setting the operation of the electric blower 18 and the like are disposed on the grip portion 37.

  Further, the floor brush 23 can constitute a part (upstream end) of the air passage W, and a connection pipe 41 whose one end side is connected to the distal end side (upstream end side) of the extension pipe 22 and this connection A horizontally long case body 42 connected to the other end side of the tube 41 so as to be rotatable in the vertical direction or the circumferential direction, and the case body 42 is rotatably provided to be grounded to the surface to be cleaned and driven to rotate. And a traveling wheel (not shown) that enables the floor brush 23 to move (run) on the surface to be cleaned. Further, a suction port that communicates with the other end side of the connecting pipe 41 is formed in the lower portion of the case body 42 facing the floor surface. In the floor brush 23, a rotary cleaning body may be rotatably disposed at the suction port, and a motor or the like as a driving unit that rotationally drives the rotary cleaning body may be disposed in the case body 42.

  Next, the internal structure of the vacuum cleaner 11 will be described.

  The vacuum cleaner 11 includes a control means 45 such as a microcomputer that receives power from a commercial AC power source e, which is a power source unit shown in FIG. As the power supply unit, for example, a battery such as a secondary battery built in the main body case 15 of the cleaner main body 12 can be used.

  The control unit 45 is an operation determination unit 51 that is an operation determination unit electrically connected to the setting button 38, and an electric power that is a power control unit that is electrically connected to the operation determination unit 51 and controls the operation of the electric blower 18. The control unit 52, the processing unit 54 that is a processing unit electrically connected to the optical sensor 53 that is a dust amount detection unit that detects the amount of dust passing through the air passage W by driving the electric blower 18, and the processing unit 54 Dust amount integration unit 55 as an electrically connected dust amount integration unit, operation time integration as an operation time integration unit that detects the operation time of electric blower 18 (the time from the start of driving electric blower 18) Unit 56, cleaning state calculating unit 57 as a calculating means for calculating the cleaning state of the surface to be cleaned, required cleaning frequency determining unit 58 as a determining means for determining the required cleaning frequency of the surface to be cleaned, and determination of the necessary cleaning frequency Display hand connected electrically with part 58 And a like display control section 60 as notification control means for controlling the operation of 20. The control means 45 may be provided with a drive means control section for controlling the drive of the motor or the like when the motor or the like is arranged on the floor brush 23, for example. Further, each part constituting the control means 45 may be integrated or separated, and can be arranged at an arbitrary position, for example, inside the main body case 15 of the cleaner body 12.

  The operation determination unit 51 determines the operation mode of the electric blower 18 for the power control unit 52 according to the operation of the setting button 38 by determining the operation of the setting button 38 by the user.

  Further, the electric power control unit 52 can control the electric blower 18, for example, through a phase angle via a control element (not shown) according to the operation mode set by the operation determination unit 51. Note that the operation mode of the electric blower 18 includes various modes such as weak, medium, strong, and stop, for example.

  As shown in FIGS. 1 and 2, the optical sensor 53 is, for example, a light emitting unit 61 as a light emitting unit that emits infrared light, and a light receiving unit that receives the infrared light emitted by the light emitting unit 61. The light receiving unit 62 is provided at a position facing each other, and a signal corresponding to the amount of dust passing through the air passage W is generated by the amount of infrared light received by the light receiving unit 62 from the light emitting unit 61. Can be output.

  The light emitting unit 61 includes a light emitting element 61a such as an LED that outputs light such as infrared light, and one and other light emitting sides as a light emitting side light guide member that guides light emitted from the light emitting element 61a into the air path W. And lenses 61b and 61c.

  The light emitting element 61a is disposed, for example, in the upper part of the main body suction port 19 of the main body case 15 of the cleaner body 12, and is configured to output infrared light downward.

  One light-emitting side lens 61b is disposed on the inner surface of the main body suction port 19 below the infrared light output side of the light-emitting element 61a.

  The other light-emitting side lens 61c is arranged at a position facing the lower side of the light-emitting element 61a (one light-emitting side lens 61b) in a state where the connecting pipe portion 26 of the air passage forming body 13 is connected to the main body suction port 19. ing. The other light-emitting side lens 61c is fitted in a light-emitting side hole 61d formed in the connecting pipe portion 26 along the radial direction so as to air-tightly close the light-emitting side hole 61d. One end faces the light emitting element 61a side (one light emitting side lens 61b side), and the other end faces the inside of the air passage W. That is, the air in the air passage W does not flow out of the air passage W from the light emitting side hole 61d.

  Similarly, the light receiving unit 62 includes a light receiving element 62a such as a phototransistor that detects infrared light output from the light emitting unit 61, and a light receiving side light guide member that guides the light output from the light emitting unit 61 to the light receiving element 62a. And the other light-receiving side lenses 62b and 62c.

  The light receiving element 62a is disposed, for example, at the lower part of the main body suction port 19 of the main body case 15 of the vacuum cleaner main body 12, and facing upward, that is, toward the light emitting element 61a, and receives infrared light output from the light emitting element 61a. And, it is configured to output a signal corresponding to the amount of received light.

  One light-receiving side lens 62b is disposed on the inner surface of the main body suction port 19 above the infrared light input side with respect to the light-receiving element 62a.

  The other light receiving side lens 62c is disposed at a position facing the light receiving element 62a (one light receiving side lens 62b) in a state where the connection pipe portion 26 of the air passage forming body 13 is connected to the main body suction port 19. ing. The other light receiving side lens 62c is fitted in a light receiving side hole 62d formed in the connecting pipe portion 26 along the radial direction so as to airtightly close the light receiving side hole 62d. One end faces the light receiving element 62a side (one light receiving side lens 62b side), and the other end faces the inside of the air passage W. That is, the air in the air passage W does not flow out of the air passage W from the light receiving side hole 62d.

  Then, when the amount of dust passing through the air passage W is relatively large (small), the optical sensor 53 increases (decreases) dust that blocks light emission from the light emitting element 61a of the light emitting unit 61. Since the amount of light received by the light receiving element 62a relatively decreases (increases), the amount of dust passing through the air passage W can be detected by increasing or decreasing the amount of received light.

  Further, the processing unit 54 includes a light emission control unit 64 that controls the light emission amount of the light emitting element 61a of the light emitting unit 61, and a light reception processing unit 65 that processes a signal from the light receiving unit 62, and integrates the dust amount. The unit 55 is electrically connected. The light receiving processing unit 65 is configured to amplify a signal from the light receiving element 62a of the light receiving unit 62 output corresponding to the amount of received light and output the amplified signal to the cleaning state calculating unit 57.

  The dust amount integrating unit 55 calculates the integrated amount of dust while the electric blower 18 is being driven by integrating the signals processed by the light receiving processing unit 65 of the processing unit 54.

  Further, the operation time integrating unit 56 has a function such as a timer, for example, and is reset when the electric blower 18 starts to be driven, and the time during which the electric blower 18 is driven or the time until the electric blower 18 is stopped It is calculated by integrating.

  Further, the cleaning state calculation unit 57 is based on the amount of dust calculated by the dust amount integration unit 55 and the operation time of the electric blower 18 calculated by the operation time integration unit 56, the cleaning state of the surface to be cleaned, In this embodiment, the degree of contamination (cleanness) of the surface to be cleaned is calculated.

  Further, the necessary cleaning frequency determination unit 58 is electrically connected to the cleaning state calculation unit 57, and the cleaning frequency of the surface to be cleaned is corresponding to the degree of contamination of the surface to be cleaned calculated by the cleaning state calculation unit 57. Is predicted and determined.

  The display control unit 60 controls the display means 20 so as to display the necessary cleaning frequency determined by the necessary cleaning frequency determination unit 58.

  Next, the operation of the first embodiment will be described with reference to the flowchart shown in FIG.

  When the user attaches (plugs in) the power cord 44 to a wall outlet or the like with the dust collecting part mounted in the main body case 15 of the vacuum cleaner main body 12, the commercial AC power source e is supplied to the control means 45. Power (voltage) is supplied (applied) from

  Then, the control means 45 waits for an operation input of the setting button 38. That is, the control means 45 determines whether or not the setting button 38 for starting the electric vacuum cleaner 11, in other words, for starting the electric blower 18, has been operated (by the operation determination unit 51) (step 1).

  In step 1, when the control means 45 determines that the vacuum cleaner 11 is not started (the setting button 38 is not operated), step 1 is repeated to start the vacuum cleaner 11 (the setting button 38 is If the control means 45 determines that the electric vacuum blower 11 (electric blower 18) is activated in the set operation mode (by the power control unit 52), the electric blower 18 Integration of the operation time of the (vacuum cleaner 11) is started (by the operation time integration unit 56) (step 2).

  Next, the control unit 45 clears the display on the display unit 20 (by the display control unit 60) (step 3), and determines whether the dust amount detected by the optical sensor 53 is equal to or greater than a predetermined amount (processing). (Via section 54). If it is determined in step 4 that the amount of dust detected by the optical sensor 53 is greater than or equal to a predetermined amount set in advance, the control means 45 integrates the dust amount (by the dust amount integration unit 55) (step 5) Go to step 6. If the control means 45 determines in step 4 that the amount of dust detected by the optical sensor 53 is not equal to or greater than a predetermined amount set in advance, the process proceeds to step 6 as it is. The dust sucked into the air passage W together with the air by driving the electric blower 18 passes through the air passage forming body 13 and the main body suction port 19 and flows into the dust collecting portion, and is collected by the dust collecting portion. . The air in which the dust is collected is sucked into the electric blower 18 and is exhausted from the electric blower 18 while cooling the electric blower 18 and is discharged to the outside of the main body case 15 of the cleaner body 12.

  And the control means 45 judges whether the setting button 38 which stops the vacuum cleaner 11, in other words, the electric blower 18, was operated (by the operation determination part 51) (step 6). In step 6, when the control means 45 determines that the vacuum cleaner 11 is not stopped (the setting button 38 is not operated), the process returns to step 4. If it is determined in step 6 that the vacuum cleaner 11 is to be stopped (the setting button 38 has been operated), the control means 45 turns the vacuum cleaner 11 (the electric blower 18) to the (power control unit 52). And the accumulation of the operation time of the electric blower 18 (electric vacuum cleaner 11) is terminated, and the surface to be cleaned is cleaned by the cleaning state calculation unit 57 based on the accumulated operation time and the amount of dust accumulated in step 5. In addition, by calculating the required cleaning frequency of the surface to be cleaned by the required cleaning frequency determination unit 58 based on this cleaning state, and controlling the display means 20 (by the display control unit 60), The necessary cleaning frequency is displayed (step 7).

  At this time, the cleaning state calculation unit 57 calculates the cleaning state based on the ratio, that is, D / T, where D is the accumulated amount of dust and T is the operation time of the electric blower 18. Further, the necessary cleaning frequency determination unit 58 compares the calculated ratio with a predetermined threshold value or a table set in advance according to the operation mode of the electric blower 18, for example, to thereby calculate the necessary cleaning frequency of the surface to be cleaned. Determine. In the present embodiment, the required cleaning frequency determined by the required cleaning frequency determination unit 58 is, for example, “every day”, “every other day”, or the like.

  For example, when the accumulated amount of dust is small (large) for a certain operating time, the calculated ratio becomes relatively small (large). In other words, it is determined that the cleaning area is relatively small (large) and the cleaning area is relatively clean (dirty). “Everyday”).

  As described above, according to the first embodiment, the cleaning state calculation unit 57 determines the cleaning state of the cleaning region based on the ratio between the accumulated amount of dust detected by the optical sensor 53 and the operation time of the electric blower 18. By calculating, the cleaning state becomes larger as the operation time of the electric blower 18 is shorter than the integrated amount of dust. In general, when cleaning the same cleaning area, there is no significant fluctuation in the operating time of the electric blower 18, so the calculated cleaning state can be used as an index of the degree of cleanliness (cleanliness) of the cleaning area. Therefore, the reliability of determination of the required cleaning frequency based on this cleaning state can be ensured.

  Next, a second embodiment will be described with reference to FIGS. In addition, about the structure and effect | action similar to the said 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the second embodiment, instead of the operation time integration unit 56 of the first embodiment, the electric vacuum cleaner 11 integrates the movement amount (movement distance) of the floor brush 23 on the surface to be cleaned. A quantity integrating unit 71 is provided.

  The movement amount integrating unit 71 is electrically connected to the ground detection unit 72 and the movement amount detection unit 73 arranged on the floor brush 23. The grounding detection unit 72 is a switch or the like protruding from the bottom of the case body 42 of the floor brush 23, and can detect the grounding to the surface to be cleaned by being turned on or off by contacting the surface to be cleaned. Further, the movement amount detection unit 73 is, for example, a sensor that can detect the movement speed and distance of the floor brush 23 by detecting the rotation speed or the rotation speed of the traveling wheels of the case body 42. Then, the moving amount integrating unit 71 integrates the moving speed and distance of the floor brush 23 detected by the moving amount detecting unit 73 in a state where the grounding detecting unit 72 detects the grounding of the floor brush 23, thereby obtaining the floor brush. The amount of movement on the surface to be cleaned is calculated.

  Then, as in the flowchart shown in FIG. 6, instead of step 2, the control means 45 activates the vacuum cleaner 11 (electric fan 18) in the set operation mode (by the power control unit 52) (step 11) In addition, between step 3 and step 4, the control means 45 determines whether or not the floor brush 23 is in contact with the surface to be cleaned (by the ground detection unit 72) (step 12). In this step 12, when the control means 45 determines that the floor brush 23 is not in contact with the surface to be cleaned, the process returns to step 12, and when it is determined that the floor brush 23 is in contact with the surface to be cleaned. The control means 45 determines whether or not the floor brush 23 is moving at a speed equal to or higher than a predetermined speed set in advance (by the movement amount detection unit 73) (step 13).

  In step 13, when the control means 45 determines that the floor brush 23 is not moving at a speed equal to or higher than the predetermined speed set in advance, the process returns to step 12, and the floor brush 23 is set in the predetermined speed. If it is determined that the vehicle is not moving at a speed higher than the speed, the control means 45 integrates the movement amount of the floor brush 23 on the surface to be cleaned (by the movement amount integrating unit 71) (step 14), Proceed to 4. If the control means 45 determines in step 6 that the vacuum cleaner 11 is not stopped (the setting button 38 is not operated), the process returns to step 12.

  Note that steps 4 and 5 may be performed before step 12 to step 14 described above. In other words, the order of the processes in steps 12 to 14 and the processes in steps 4 and 5 is not limited.

  In step 7, the control means 45 stops the electric vacuum cleaner 11 (electric blower 18) (by the electric power control unit 52), and the movement amount of the floor brush 23 accumulated in step 14 on the surface to be cleaned is calculated. Based on the amount of dust accumulated in step 5, the cleaning state calculation unit 57 calculates the cleaning state of the surface to be cleaned, and further, based on this cleaning state, the necessary cleaning frequency determination unit 58 determines the required cleaning frequency of the surface to be cleaned. The necessary cleaning frequency is displayed by calculating and controlling the display means 20 (by the display control unit 60).

  At this time, the cleaning state calculation unit 57 calculates the cleaning state based on the ratio, that is, D / L, where D is the cumulative amount of dust and L is the amount of movement of the floor brush 23.

  As described above, according to the second embodiment, the cleaning state calculation unit 57 performs the cleaning region based on the ratio between the integrated amount of dust detected by the optical sensor 53 and the amount of movement of the floor brush 23 on the surface to be cleaned. By calculating the cleaning state, the smaller the amount of movement of the floor brush 23 on the surface to be cleaned with respect to the accumulated amount of dust, the larger the cleaning state. Generally, since there is no large variation in the amount of movement of the floor brush 23 when cleaning the same cleaning area, the calculated cleaning state can be used as an index of the degree of cleanliness (cleanness) of the cleaning area. The reliability of the determination of the necessary cleaning frequency based on this cleaning state can be ensured.

  According to at least one embodiment described above, the cleaning state in the cleaning area is calculated by the cleaning state calculation unit 57 based on the amount of dust detected by the optical sensor 53, and the required cleaning frequency predicted from the calculated cleaning state Can be indicated to the user by the display means 20 when cleaning is necessary.

  That is, by displaying, for example, “every day” or “every other day” on the display means 20 as the necessary cleaning frequency, the user sees the display and next time whether to clean every day or every other day. It is possible to determine the timing of cleaning. Further, even if the user does not fully follow the necessary cleaning frequency displayed on the display means 20, for example, when "everyday" is displayed, the "every other day" is displayed. The user can determine the next cleaning timing by referring to the contents of the displayed necessary cleaning frequency, such as increasing the cleaning frequency.

  Therefore, by displaying the necessary cleaning frequency predicted based on the cleaning state of the cleaning area, it is possible to provide the user with a “cleaning forecast”, which improves convenience.

  The user can analyze the cleaning area that needs to be cleaned with reference to the necessary cleaning frequency, and can maintain the cleaning area in a clean state without cleaning more than necessary. That is, the user can count and accumulate the amount of dust for each cleaning area based on the required cleaning frequency, so that it is easy to get dirty, that is, a cleaning area that needs frequent cleaning, and it is hard to get dirty, that is, it does not require frequent cleaning. Since it can be distinguished from the cleaning area, there is no need to perform unnecessary cleaning, efficient and effective cleaning is possible, and the user can be encouraged not to perform unnecessary cleaning. It can contribute to energy saving.

  In addition, when the user recognizes the increase or decrease in the necessary cleaning frequency displayed on the display means 20, for example, when the necessary cleaning frequency is relatively reduced, the user can be given a sense of achievement of cleaning, If the necessary cleaning frequency is relatively increased, the user can be motivated to perform the next cleaning.

  In each of the above-described embodiments, the notifying means may be not only the display means 20 for visually displaying, but also an informing means for audibly informing by voice or the like, or a combination thereof.

  Further, the control means 45 may automatically control the input of the electric blower 18 or the motor of the floor brush 23 in accordance with the amount of dust detected by the optical sensor 53.

  Further, a large amount of dust detected by the optical sensor 53 during operation of the electric blower 18 may be displayed on the display means 20 or the like.

  Then, the required cleaning frequency for the past several times or a predetermined period in the past is stored in a storage means such as a non-volatile memory, and the data is newly fed back to the determination of the required cleaning frequency of the cleaning area to be newly predicted. May be.

  In addition, for example, for each of a plurality of different cleaning areas designated by the user or automatically detected by the vacuum cleaner 11, the cleaning state calculation unit 57 calculates the cleaning state, and the necessary cleaning frequency based on the cleaning state The determination unit 58 may determine the necessary cleaning frequency and display the necessary cleaning frequency on the display unit 20 as necessary.

  Furthermore, the vacuum cleaner 11 is not limited to the canister type, and can be used in an upright type or a handy type in which the floor brush 23 is connected to the lower part of the vacuum cleaner body 12.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

11 Vacuum cleaner
12 Vacuum cleaner body
18 Electric blower
20 Display means as notification means
23 Floor brush as inlet
53 Optical sensor as dust detection means
57 Cleaning condition calculation unit as calculation means W Air path

Claims (3)

A vacuum cleaner body containing an electric blower,
An air passage communicating with the suction side of the electric blower;
Dust amount detection means for detecting the amount of dust passing through the air passage by driving the electric blower;
Calculating means for calculating the cleaning state of the cleaning area based on the amount of dust detected by the dust amount detecting means;
An electric vacuum cleaner comprising: an informing means for informing a necessary cleaning frequency predicted from the cleaning state calculated by the calculating means. The vacuum cleaner according to claim 1, wherein the calculating means calculates a cleaning state of the cleaning area based on a ratio between an integrated amount of dust detected by the dust amount detecting means and an operation time of the electric blower. It is movable on the surface to be cleaned, and has a suction port that forms part of the air path,
The calculating means calculates the cleaning state of the cleaning region based on a ratio between an integrated amount of dust detected by the dust amount detecting means and a moving amount of the suction port on the surface to be cleaned. The vacuum cleaner described.

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