JP4525239B2 - Vacuum cleaner - Google Patents

Description

  The present invention relates to control of a general household or business-use vacuum cleaner.

  FIG. 6 shows a schematic configuration diagram of a conventional vacuum cleaner. In FIG. 6, 1 is a main body of the vacuum cleaner, 2 is an electric blower built in the main body 1 and generates a suction force, and 3 is a switching means 4 for switching operation modes at different inputs (supply power) of the electric blower 2. The hose 5 has an extension pipe, 8 is a suction tool that contacts the surface to be cleaned and sucks dust and the like, and 6 is a dust collection chamber for storing the sucked dust. The hose 3 and the dust collection chamber 6 are connected via an intake port 7 provided in the main body 1, and the dust collection chamber 6, the hose 3, the extension pipe 5 and the suction tool 8 form an intake path.

  A control means (not shown) provided in the main body 1 is configured to control the input (power supply) of the electric blower 2 according to the mode set by the switching means 4.

  In the vacuum cleaner configured as described above, the user operates the switching unit 4 to supply power to the electric blower 2, and the operation mode is changed from the stop mode in which the power supply to the electric blower 2 is stopped. If it transfers, the dust attracted | sucked from the suction tool 8 will be accumulate | stored in the dust collection chamber 6 via an intake route.

  In this type of vacuum cleaner, a commutator motor is often used as the electric blower 2, and the brush is in contact with the commutator and rotates to supply a drive current to the commutator. In addition, since the frequency of maintenance increases, there is a case where time management is possible by storing the time and number of times the electric vacuum cleaner is energized and the time of energization of the electric blower 2 in a nonvolatile memory (patent) Reference 1).

The durability of the commutator motor, particularly the brush, is affected by the current flowing through the electric blower 2, the applied voltage, the power and the temperature.
JP 2004-000452 A

  However, since only the energization time is stored for the electric blower 2 in the conventional configuration, if the energization time is the same, the input (supply power) of the electric blower 2 is different, or the user's mode Regardless of how they are used, the same energization time is required, and there is a problem in terms of reliability that there is no difference under actual usage conditions.

  This invention solves the said conventional subject, and it aims at being able to manage the operating time of a vacuum cleaner with high precision irrespective of the usage of the user with respect to the mode from which the input of the electric blower 2 differs. .

In order to solve the above-mentioned conventional problems, the vacuum cleaner of the present invention has an electric blower, a plurality of modes in which the electric blower operates, a control means for controlling the operation of the electric blower, and a plurality of modes. Switching means for switching between, a first timing means for timing operation times of at least two or more modes among the plurality of modes, a second timing means for counting cumulative operation times of the plurality of modes, Nonvolatile storage means for storing the time measured by one time measuring means and the time measured by the second time measuring means, temperature detecting means for detecting the temperature of the electric blower or the vicinity of the electric blower, and detection of the temperature detecting means Temperature correction means for correcting at least one of the time measured by the first time measuring means and the time measured by the second time measuring means in accordance with the temperature to be measured .

  As a result, the operation time can be stored for each mode, so that time management can be performed for each mode.

  The vacuum cleaner of this invention can grasp | ascertain the operation time and usage condition of a vacuum cleaner with high precision irrespective of a user's usage, and can contribute to the performance and reliability improvement of a vacuum cleaner.

The first invention has an electric blower, a plurality of modes in which the electric blower operates, a control means for controlling the operation of the electric blower, a switching means for switching between the plurality of modes, and a plurality of modes. A first time measuring means for measuring the operation time of at least two modes, a second time measuring means for measuring the accumulated operation time of the plurality of modes, a time for the first time measuring means, and a second time Non-volatile storage means for storing the time measured by the time measurement means , temperature detection means for detecting the temperature of the electric blower or the vicinity of the electric blower, and at least the first time measurement means according to the temperature detected by the temperature detection means time to count, as it has a temperature compensation means for applying a correction to one of the time counting of the second timer means, the operation of a standard operating temperature of the electric blower temperature correction means is set in advance Time converted between, since the storage unit stores, with respect to the temperature of the electric blower, it is possible to grasp the operating time closer to the actual use. In addition, by collecting the data stored in the storage means, it is possible to accurately grasp the operation frequency of the vacuum cleaner considering the ratio of the usage frequency for each mode and the magnitude of the input to the electric blower. Can do. Furthermore, since it can grasp | ascertain the operating time and usage condition of a vacuum cleaner with high precision irrespective of a user's usage, it can contribute to the performance and reliability improvement of a vacuum cleaner. Also, there is provided a second time measuring means for measuring the accumulated operation time of the plurality of modes, and the storage means is configured to store the time measured by the first time measuring means and the time measured by the second time measuring means. Therefore, it is possible to grasp the use ratio of the mode storing the operation time with respect to the total use time of the vacuum cleaner.

The second invention has an electric blower, a plurality of modes in which the electric blower operates, a control means for controlling the operation of the electric blower, a switching means for switching a plurality of modes, and a plurality of modes.
Among the first mode, a first timing unit that counts the operation time of at least two modes, a second timing unit that counts the cumulative operation time of the plurality of modes, and a time period that is measured by the first timing unit and a nonvolatile storage means for storing the time for measuring the second time counting means, a voltage detecting means for detecting a power supply voltage according to the voltage detected by the voltage detecting means, for counting at least a first timer means Voltage correction means for correcting either the time or the time measured by the second time measuring means , and the voltage correction means converts the operation time at the standard operating voltage of the electric blower set in advance by the voltage correction means Is stored in the storage means, so that the operation time closer to the actual use can be grasped with respect to the voltage applied to the electric vacuum cleaner or the electric blower. Further, by collecting the data stored in the storage means, it is possible to accurately grasp the operating frequency of the vacuum cleaner considering the ratio of the usage frequency for each mode and the magnitude of the input to the electric blower. Can do. Furthermore, since it can grasp | ascertain the operating time and usage condition of a vacuum cleaner with high precision irrespective of a user's usage, it can contribute to the performance and reliability improvement of a vacuum cleaner. Also, there is provided a second time measuring means for measuring the accumulated operation time of the plurality of modes, and the storage means is configured to store the time measured by the first time measuring means and the time measured by the second time measuring means. Therefore, it is possible to grasp the use ratio of the mode storing the operation time with respect to the total use time of the vacuum cleaner.

The third invention is the invention of the first or 2, electrostatic dynamic blower, or a temperature detecting means for detecting the electric blower temperature near, the number of times the detection temperature of the temperature detecting means exceeds a predetermined temperature Since it has a counting means for counting and the storage means stores the number of times the counting means counts, the influence of temperature on the operating time can be grasped with higher accuracy.

According to a fourth invention, in the first or second invention, there is provided an electric blower or a temperature detection means for detecting a temperature in the vicinity of the electric blower, and the storage means detects at least the temperature detection means including the maximum temperature. Since the temperature to be stored is stored, the influence of the temperature on the operating time can be grasped with higher accuracy, and the actual use condition for the high temperature can be grasped.

In a fifth aspect based on the fourth aspect , since the storage means stores at least the temperature detected by the temperature detection means including the lowest temperature, it is possible to grasp the actual use condition for the temperature that becomes low. it can.

According to a sixth invention, in the first or second invention, there is provided voltage detection means for detecting a power supply voltage, and the storage means stores at least the voltage detected by the voltage detection means including the highest voltage. Therefore, the influence of the voltage applied to the electric vacuum cleaner or the electric blower on the operation time can be grasped with higher accuracy, and the actual use condition for the voltage that becomes a high voltage can be grasped.

According to a seventh invention, in the sixth invention, the storage means stores at least the voltage detected by the voltage detection means including the lowest voltage, so that the actual use of the voltage that becomes a low voltage is also grasped. Can do.

According to an eighth invention, in any one of the first to seventh inventions, the storage means performs the storage operation when the control means switches to the mode for stopping the electric blower. Data can be reliably stored.

According to a ninth invention, in any one of the first to seventh inventions, there is provided a voltage detection means for detecting a power supply voltage, and the storage means has a voltage detected by the voltage detection means being equal to or lower than a predetermined voltage. Since the storage operation is sometimes performed, the storage operation can be performed before the voltage applied to the vacuum cleaner decreases and the storage operation cannot be normally performed, and the reliability of the stored data can be improved.

  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. 1 is a block diagram of the electric vacuum cleaner according to the first embodiment of the present invention.

  In FIG. 1, reference numeral 10 denotes a control means, which is switched by a switch 11 as a switching means, and the bidirectional raw thyristor 12 is phase-controlled in accordance with a set mode (hereinafter referred to as a position), so that the electric blower 2 The power supplied is configured to be controlled. Reference numeral 13 denotes a first timing means, which is configured to count the operation time for each position, and 14 is a second timing means, which is configured to count the total of the operation time for each position.

  Reference numeral 15 denotes temperature detection means for detecting the temperature in the vicinity of the electric blower 2, reference numeral 16 denotes voltage detection means for detecting the voltage of the power supply 17, which is a commercial power supply, and reference numeral 18 denotes air sucked by the electric blower 2, that is, The humidity detecting means for detecting the humidity of the atmosphere around the device. The time measured by the first time measuring means and the time measured by the second time measuring means are corrected by means of the correction means 19 according to the temperature, voltage and humidity. It is comprised so that it may correct | amend.

  Reference numeral 20 denotes a storage means for storing the time corrected by the correction means 19, and is composed of an EEPROM 21, which is a nonvolatile memory for storing data to be stored, and a writing means 22 for performing storage determination and storage processing. The

  Reference numeral 23 denotes current detection means for detecting a current flowing through the electric blower 2, and the current detection means 23 is an air volume detection means or pressure detection means as a switching means realized by current detection.

  FIG. 3 shows the air volume-current characteristics and the air volume-vacuum (pressure) characteristics of the electric blower 2. As shown in FIG. 3, the air flow sucked by the electric blower 2 monitors the current flowing through the electric blower 2. Can be detected. That is, the control means 10 is preset with the relationship between the current detected by the current detection means 23 and the air volume, and the control means can detect the air volume sucked by the electric blower 2 based on the current value. Similarly, from the characteristics shown in FIG. 3, the degree of vacuum generated by the electric blower 2 or the pressure in the dust collection chamber 6 is detected by the current detection means 23 by presetting the relationship between the current value and the pressure. can do.

  The control means 10, the first time measuring means 13, the second time measuring means 14, the correction means 19, and the writing means 22 are constituted by a microcomputer 25.

  Reference numeral 26 denotes a display means for displaying data stored in the EEPROM 21.

  About the vacuum cleaner comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

As shown in FIG. 2, the control unit 10 stops the power supply to the electric blower 2 as “strong”, “medium”, and “weak” according to the supply power (input) to the electric blower 2. The electric blower 2 is controlled by having four positions of “stop”, and the control means 10 controls the phase of the bidirectional raw thyristor 12 to vary the power supplied to the electric blower 2. Switch 1
1 is also configured to switch between these four positions.

  Actually, the positions used for cleaning are three positions of “strong”, “medium”, and “weak” (hereinafter referred to as operation positions). When shifting to “strong” or “medium”, timing starts, and when shifting from “stop” to the operating position, the second timing means 14 starts timing. When shifting to “stop” again, both the first time measuring means 13 and the second time measuring means 14 interrupt the time keeping and keep the time during the time keeping.

  At this time, the first time measuring means 13 and the second time measuring means 14 read the data (time information) stored at that time from the EEPROM 21 when the device is turned on, and accumulate the time as an initial value. Count.

  The voltage detection means 16 monitors not only the voltage level of the power source 17 but also the voltage drop of the power source 17 or the connection between the device and the power source 17, and the voltage is abnormal due to the device being disconnected from the power source 17 or for some reason. Before the microcomputer 25 becomes in a state in which the microcomputer 25 cannot operate normally, the writing means 22 uses the data that the first time measuring means 13 and the second time measuring means 14 are measuring or holding. Is written in the EEPROM 21 and stored.

  The durability of the electric blower 2 is affected by various usage parameters, and the validity of the durability varies depending on the situation, for example, the input of the electric blower 2 during operation and the intake air volume. Therefore, the validity of the durability cannot be determined unless it is known at which position and for how long at least three positions with different inputs of the electric blower 2 are used.

  In general, the higher the power supplied to the electric blower 2, the higher the rotation speed and the lower the durability, and the lower the power supplied, the higher the durability. Therefore, as shown in FIG. 2, the input area is divided into three areas, W0, W1, and W2, corresponding to the positions of “strong”, “medium”, and “weak”. Recognize the difference between the standard and actual use by comparing the durability of the electric blower 2 against the data stored in the collected EEPROM 21 with the appropriate durability of the electric blower 2 as the standard, and put the standard into actual use The durability of the electric blower 2 can be improved while improving to a suitable one.

  In addition, if the airflow is different from the airflow, the cooling effect on the heat generated by the electric blower 2 itself is also changed. The smaller the cooling effect, the lower the durability, and the higher the cooling effect, the higher the durability.

  FIG. 4 shows the control characteristics of the electric blower 2 with respect to the air volume at the “medium” position. The control means 10 controls the air volume information detected by the current detection means 23 in each of the air volume areas Q0, Q1, Q2, and Q3. The power supplied to the electric blower 2 is controlled at different phases, that is, the input to the electric blower 2 is switched according to the current detected by the current detection means 23 as the switching means, and the first timing means 13 is In the “medium” position, the operation time in the air volume area Q0, the operation time in Q1, the operation time in Q2, and the operation time in Q3 are counted, and the writing means 22 operates in the “medium” position. When the time is written in the EEPROM 21, the operation time for each air volume area is written in the same manner, so that not only the position but also the influence on the durability of each input within the same position. The amount of influence can be grasped, it can help improve durability of the electric blower 2.

As described above, in the present embodiment, the operation time of “strong” and “medium” measured by the first time measuring means 13, the time measured by the second time measuring means 14, and the “medium” position Since the writing means 22 stores the operation time for each air volume area in the EEPROM 21, it is possible to grasp the actual usage time of the device for each different input level of the electric blower 2, and grasp the actual situation. The reliability of the electric blower 2 can be improved by repeating the improvements.

  At this time, since the person who collects and analyzes the microcomputer 25, the board on which the EEPROM 21 is mounted, and the electric blower 2 can visually recognize the data stored in the storage means 20 with the display means 26, it is easy. In addition, the usage time of each position can be grasped.

  Here, since the accumulated operation time measured by the second timing means 14 and the operation time of the “strong” and “medium” positions are stored, the ratio of the operation time of each position to the total operation time of the device is grasped. It is possible to recognize which input area should be improved mainly. In addition, the operation time of the “weak” position can be calculated from the total operation time and the operation time of the “strong” and “medium” positions, and the efficiency of writing to the EEPROM 21 is reduced by reducing the stored data. can do.

  Further, as a parameter affecting the durability of the electric blower 2, there is the temperature of the electric blower 2, and if the heat generation effect is much larger than the cooling effect of the electric blower 2 itself, and the temperature rises too much, the electric blower The durability of 2 decreases. If the temperature in the vicinity of the electric blower 2 detected by the temperature detecting means 15 is higher than a preset reference temperature, the correcting means 19 multiplies the time measured by the first time measuring means 13 by a correction coefficient Ta (Ta> 1). So that it is longer than the actual driving time. Ka varies according to the temperature level. On the contrary, if the temperature is lower than the reference temperature, a correction coefficient Tb (Tb <1) is applied so as to be shorter than the actual operation time. The operating time corrected by the correcting means 19 is written and stored in the EEPROM 21 by the writing means 22 so that the operating time in the state affected by the temperature is stored. Therefore, the temperature of the electric blower 2 in actual use is assumed. If the temperature is higher than the operating temperature, the operating time will be longer, and if it is lower, the operating time will be converted to operating time so that the operating time will be shortened. Even without having, it is possible to easily analyze the operation time.

  Similarly, as the humidity increases, the progress of corrosion and the like progresses and the durability decreases. Therefore, the time measured by the first time measuring unit 13 with respect to the preset reference humidity by the humidity detected by the humidity detecting unit 18. Is multiplied by the correction coefficient Ha (Ha> 1) so as to be longer than the actual operation time. Ha varies according to the humidity level. Conversely, if the humidity is lower than the reference humidity, a correction coefficient Hb (Hb <1) is applied so as to be shorter than the actual operation time, and the operation time corrected by the correction means 19 is written and stored in the EEPROM 21 by the writing means 22. As a result, the accuracy is improved, and the operation time can be easily analyzed without having specialized knowledge.

  Also, the input of the voltage of the power supply 17 is preset by the voltage detected by the voltage detection means 16 because the input changes if the voltage changes even if the phase at which the control means 10 controls the electric blower 2 is constant. A correction coefficient Va (Va> 1) is applied to the time measured by the first time measuring means 13 with respect to the reference voltage (rated voltage) so as to be longer than the actual operation time. Va varies depending on the voltage level. On the contrary, if it is lower than the reference voltage, the correction coefficient Vb (Vb <1) is applied so as to be shorter than the actual operation time, and the operation time corrected by the correction means 19 is written and stored in the EEPROM 21 by the writing means 22. As a result, the accuracy is improved, and the operation time can be easily analyzed without having specialized knowledge.

(Embodiment 2)
FIG. 5 is a block diagram of a vacuum cleaner according to the second embodiment of the present invention.

In FIG. 5, 31 is a counting means that counts up when the temperature detected by the temperature detecting means 15 exceeds a predetermined temperature, and the control means 10 has this same predetermined temperature, and when it exceeds the predetermined temperature, the electric blower The power supply to No. 2 is stopped, and a transition is made to the “stop” position. The counting means 31 is realized inside the microcomputer 25. The storage means 20 includes the time measured by the first time measuring means 13 and the second time measuring means 14, the temperature detected by the temperature detecting means 15, the voltage detected by the voltage detecting means 16, the humidity detected by the humidity detecting means 18, The count value counted by the count number means 31 is stored, and communication means for transmitting the data stored in the EEPROM 21 to the outside of the device is provided.

  About the vacuum cleaner comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  When the cooling effect of the electric blower 2 itself decreases with respect to the heat generated by the operation of the electric blower 2, not only the durability of the electric blower 2 is lowered, but also the microcomputer 25 and the bidirectional raw thyristor 12. It also affects durability and reliability, such as malfunctions. The control means 10 determines that the temperature detected by the temperature detection means 15 that detects the temperature in the vicinity of the electric blower 2 is a temperature range that may not be able to operate normally when the temperature reaches a predetermined temperature. As the protection operation, the power supply to the electric blower 2 is stopped and the operation is shifted to the “stop” position. The counting means 31 also has the same predetermined temperature as the control means 10, and at this time, the counting means 31 counts up by +1 with respect to the initially set count value. The counting means 31 reads the count value stored in the EEPROM 21 and sets it as an initial value when the device is turned on and the microcomputer 25 starts its operation.

  When the position shifts to “stop”, the writing means 22 writes the counted value of the counting means 31 counted up to the EEPROM 21 and simultaneously counts the first timing means 13 and the second timing means 14. The time immediately before the transition to “stop” is written in the EEPROM 21.

  As a result, not only the operation time of the electric blower 2 but also the number of protection operations can be recognized, and more accurate feedback can be applied to improve durability and reliability. By saving the data, it is possible to reliably store the data even if the protection operation is performed.

  When referring to the data stored in the EEPROM 21, a separate display unit (not shown) is prepared separately from the present device, and the stored data transmitted by the communication unit 32 is received and displayed. The data can be visually recognized without complicating the configuration of the device, and the data can be easily grasped.

  As described in the first embodiment, the first time measuring means 13 and the second time measuring means 14 measure the operation time in the “strong” and “medium” positions and the total operation time in all positions. However, the influence on the durability of the electric blower 2 even during the same operation time varies depending on the use conditions such as temperature, humidity, and power supply voltage.

As shown in Table 1, the storage unit 20 has three detection temperatures detected by the temperature detection unit 15 in three areas from the data areas 1 to 3 in order of highest temperature (Tmax ≧ T2 ≧ T3). Remember. If the detected temperature T is Tmax> T, the temperature T3 is updated so that T3 = T2, T2 = Tmax, and Tmax = T. If Tmax>T> T2, T3 = T2 and T2 = T. Update as follows.

  Similarly, as shown in Table 1, the storage unit 20 stores Vmax, V2, and V3, and Hmax, H2, and H3 for the detection voltage of the voltage detection unit 16 and the detection humidity of the humidity detection unit 18. It works like this.

  As a result, the operating conditions of temperature, humidity, and power supply voltage can be grasped simultaneously with the operating time, so that the durability of the electric blower 2 corresponding to the usage conditions, in particular, the conditions that tend to lower the durability It is possible to grasp the substance.

  Further, as shown in Table 2, the storage means 20 is divided into three areas from the data areas 4 to 6 in the order of the lowest temperature (Tmin ≦ T5 ≦ T6) in the same manner for the detected temperatures. Also for detection voltage and detection humidity, Vmin, V5, V6 and Hnin, H5, H6 are stored three by three, especially under conditions that tend to improve from the state assuming durability. You can grasp the substance.

  Therefore, not only can the operation time and usage entity of the electric blower 2 be grasped, but the operation time of the electric blower 2 can be analyzed with high accuracy according to the use situation, and has high durability and high reliability. This can lead to the development of a vacuum cleaner.

  In the present embodiment, the timing at which the writing means 22 writes to the EEPROM 21 is shifted to the “stop” position, but it is needless to say that the switch 11 switches the position to “stop”. .

  As described above, the vacuum cleaner according to the present invention makes it possible to grasp the operating time and actual usage of the vacuum cleaner with high accuracy regardless of how the user is used. It can also be applied to applications such as inspection of equipment equipped with and survey of actual usage.

The block diagram of the vacuum cleaner in Embodiment 1 of this invention Same as above, input operation explanatory diagram for each position of control of vacuum cleaner Explanatory drawing of air volume-current characteristics and air volume-vacuum (pressure) characteristics of vacuum cleaner Same as above, explanatory diagram of input operation in “middle” position of vacuum cleaner The block diagram of the vacuum cleaner in Embodiment 2 of this invention Schematic configuration diagram of a conventional vacuum cleaner

DESCRIPTION OF SYMBOLS 10 Control means 11 Switch 12 Bidirectional raw thyristor 13 1st time measuring means 14 2nd time measuring means 15 Temperature detection means 16 Voltage detection means 17 Power supply 18 Humidity detection means 19 Correction means 20 Storage means 21 EEPROM
22 Writing means 23 Current detection means 25 Microcomputer

Claims (9)

An electric blower, a plurality of modes in which the electric blower operates, control means for controlling the operation of the electric blower, switching means for switching the plurality of modes, and at least two of the plurality of modes First timing means for timing operation times of two or more modes, second timing means for timing cumulative operation times of the plurality of modes, time counted by the first timing means, and the second time and nonvolatile storage means for storing the time for measuring the time measuring means, said temperature detecting means for detecting an electric blower or the electric blower temperature in the vicinity, in response to the temperature detected by said temperature detecting means, at least a first time counting of the clock means, an electric vacuum cleaner having a temperature compensation means for applying a correction to one of the time counting of the second time measuring means. An electric blower, a plurality of modes in which the electric blower operates, control means for controlling the operation of the electric blower, switching means for switching the plurality of modes, and at least two of the plurality of modes First timing means for timing operation times of two or more modes, second timing means for timing cumulative operation times of the plurality of modes, time counted by the first timing means, and the second time Non-volatile storage means for storing the time measured by the time measurement means , voltage detection means for detecting the power supply voltage, and at least the time measured by the first time measurement means according to the voltage detected by the voltage detection means, vacuum cleaner with a voltage correction means for applying either the correction of the time counting of the second timer means. A temperature detecting means for detecting the temperature of the electric blower or the vicinity of the electric blower; and a counting means for counting the number of times the temperature detected by the temperature detecting means is equal to or higher than a predetermined temperature. The vacuum cleaner of Claim 1 or 2 which memorize | stores the frequency | count to count. The electric vacuum cleaner according to claim 1 or 2, further comprising temperature detection means for detecting an electric blower or a temperature in the vicinity of the electric blower, wherein the storage means stores a temperature detected by the temperature detection means including at least a maximum temperature. . 5. The electric vacuum cleaner according to claim 4, wherein the storage means stores a temperature detected by the temperature detection means including at least a minimum temperature. It has a voltage detecting means for detecting a power supply voltage, storage means, electric vacuum cleaner according to claim 1 or 2 for storing the detection to the voltage of said voltage detecting means including at least the highest voltage. The electric vacuum cleaner according to claim 6, wherein the storage means stores a voltage detected by the voltage detection means including at least a minimum voltage. The electric vacuum cleaner according to any one of claims 1 to 7 , wherein the storage unit performs a storage operation when the control unit switches to a mode in which the electric blower is stopped. It has a voltage detecting means for detecting a power supply voltage, storage means, any one electro of claims 1 to 7 for performing a storage operation when the voltage detected by the said voltage sensing means is below a predetermined voltage Vacuum cleaner.

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