JP2010142260A - Vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum cleaner which attains compatibility between saving energy and a cleaning performance. <P>SOLUTION: The vacuum cleaner includes: an electric blower 2; an operation portion 4 for setting an operation mode; a suction tool 6 provided with a grounding detection switch means 15 for detecting the presence/absence of grounding on a surface to be cleaned; and a microcomputer 16 having an operating mode of supplying power according to the operation mode set in the operation portion 4 to the electric blower 2 and a stop mode of not supplying the power, for controlling the electric motor 2. The microcomputer 16 has a standby mode for lowering or stopping power supply to the electric blower 2 when the grounding detection switch means 15 detects that the suction tool 6 is not grounded on the surface to be cleaned during an operating mode operation, and an inspection means (not shown in the figure) for determining whether or not the grounding detection switch means 15 can normally detect the presence/absence of the grounding on the surface to be cleaned, wherein the power supply to the electric blower 2 is lowered or stopped only when the inspection means determines that the grounding detection switch means 15 can detect the grounding. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a vacuum cleaner, and more particularly to a vacuum cleaner that can reduce power consumption.

  Conventionally, as this type of vacuum cleaner, an electric blower is provided in the main body of the vacuum cleaner, and a suction tool for sucking dust by the intake air generated by the electric blower is connected to the main body of the vacuum cleaner through a hose, etc. The suction tool is provided with a rotary brush and an electric motor for rotating the rotary brush, a power supply line is provided from the vacuum cleaner body to the motor of the suction tool, and a switch means is provided on the power supply line. The switch means is closed when the suction tool is grounded to the surface to be cleaned, and is opened when the suction device is not grounded to the surface to be cleaned.

  The motor is driven when the switch means is closed, and the motor of the suction tool is stopped when the switch means is not opened.

  In addition, it has a grounding detecting means for detecting whether or not the suction tool is grounded to the surface to be cleaned, and when the grounding detection means detects that the suction tool is not grounded to the surface to be cleaned, it only stops the motor. However, when the suction tool is away from the surface to be cleaned, it is not cleaned, so the output of the electric blower is not necessary, and the output of the electric blower is reduced or stopped for power saving and noise reduction. There is also an electric vacuum cleaner which is made to perform (for example, refer to patent documents 1).

  In addition, after the switch means is closed, the ground detection means detects that the suction tool is not grounded on the surface to be cleaned, and again detects that the suction tool is grounded on the surface to be cleaned. There is also an electric vacuum cleaner in which the driving state of the electric blower is set to a lower driving state when it is detected that the suction tool is not grounded to the surface to be cleaned (for example, see Patent Document 2).

This is because the grounding detection means is provided in the suction tool, so when the suction tool without the motor is attached, or when the vacuum cleaner is used without the suction tool, the output of the electric blower is Since the signal of the grounded state is not input to the control means for controlling, the output of the electric blower is prevented from being lowered regardless of the cleaning state. Check that the output signal changes from a state where the suction tool is not grounded to the surface to be cleaned to a state where it is grounded, so that the suction tool equipped with an electric motor equipped with a ground detection means is attached. It is possible to allow the reduction of the output of the electric blower only when a suction device equipped with an electric motor is installed, and dedicated for detection of the suction device It is obtained by can be realized without providing a means.
JP-A-1-198519 JP 2002-369777 A

  However, in the configuration of the conventional vacuum cleaner, the switch means and the ground detection means break down. In the case of the switch means, the signal is fixed to the open side, and in the case of the ground detection means, the signal is fixed to the ungrounded state side. If the suction tool is grounded and the surface to be cleaned is actually being cleaned, the output of the electric blower is controlled to be low, and sufficient dust collecting power cannot be obtained. It had the problem that.

  Moreover, in the structure of the conventional vacuum cleaner described in the said patent document 2, when the failure mentioned above occurs, it becomes the structure which operate | moves so that the output of an electric blower may not be made low irrespective of the objective of the structure. However, there is a problem that when the suction tool is not grounded after the failure is released, it takes time until the output of the electric blower shifts to a low energy saving state.

  The present invention solves the above-described conventional problems, and when the switch means and the ground detection means fail or there is a temporary malfunction, the cleaning performance is not deteriorated and there is no failure. To provide a vacuum cleaner that can quickly shift to an energy-saving state that can be switched to an energy-saving state when the temporary malfunction is resolved, and that can improve the energy-saving performance without adversely affecting the cleaning performance. Objective.

  In order to solve the above-described conventional problems, the vacuum cleaner of the present invention detects the presence or absence of grounding between the electric blower housed in the main body and generating suction force, the operation unit for setting the operation mode, and the surface to be cleaned. Control for controlling the electric blower having a suction tool provided with a ground detection means, an operation mode for supplying electric power to the electric blower according to the operation mode set in the operation unit, and a stop mode for not supplying electric power And the control means reduces the power supplied to the electric blower when the ground detection means detects that the suction tool is not grounded on the surface to be cleaned during operation in the operation mode, or A standby mode for stopping, and an inspection unit for determining whether the grounding detection unit can normally detect the presence or absence of grounding with the surface to be cleaned. Only when it is determined that the ground can be detected, the power supplied to the electric blower is reduced or stopped, and the inspection means checks whether the output signal of the ground detection means is normal at a predetermined timing. If it is normal, the control means permits the transition to the standby mode, and if permitted, for example, the user must suddenly perform other tasks while cleaning the floor surface with a vacuum cleaner. If left unattended and operated (with the suction tool not grounded to the floor), the control means detects that the suction tool is not grounded on the surface to be cleaned from the output information of the ground detection means. It controls to make the drive state of a blower into a low state. If the inspection means determines that an abnormality has occurred, it operates so as not to allow the transition to the standby mode, so the control means detects from the output information of the ground detection means that the suction tool is not grounded on the surface to be cleaned. Even so, the driving state is maintained without lowering the driving state to the electric blower, so the user is not cleaning, and when the state of the electric blower for cleaning is not necessary, The drive state of the electric blower can be lowered, power saving and noise reduction can be realized, and when the grounding detection means has a failure such as a failure, the cleaning performance in a situation where cleaning must be performed is reduced. Therefore, it is possible to realize a vacuum cleaner that achieves both energy saving, noise reduction, and usability.

  When the vacuum cleaner of the present invention is in a state where the suction tool is floating from the surface to be cleaned, such as when left in operation of the vacuum cleaner, the operation of the electric blower can be reduced to save power and reduce noise, Only when the means for detecting that the suction tool is floating from the surface to be cleaned is normal, the operation of the electric blower is set to a low state. Environmental considerations that can achieve power saving and noise reduction without degrading the cleaning performance in situations where it is necessary, and can quickly shift to the energy saving and silent state when the abnormality is cleared And a vacuum cleaner that balances user-friendliness.

  The first invention is an electric blower that is housed in a main body and generates a suction force, an operation unit that sets an operation mode, and a suction tool that includes a grounding detection unit that detects the presence or absence of grounding of the surface to be cleaned, An operation mode for supplying electric power to the electric blower according to the operation mode set in the operation unit, and a control unit for controlling the electric blower having a stop mode in which no electric power is supplied. During operation in the operation mode, when the grounding detection means detects that the suction tool is not grounded on the surface to be cleaned, the standby mode in which the power supplied to the electric blower is reduced or stopped, and the grounding detection means Has an inspection means for determining whether or not the ground contact with the surface to be cleaned can be normally detected, and only when the inspection means determines that the ground detection means can detect the ground contact, The power supplied to the electric blower is reduced or stopped, and the inspection means checks whether the output signal of the grounding detection means is normal at a predetermined timing. If the mode is allowed, and the user is permitted to do so, for example, the user must suddenly do other things while cleaning the floor with a vacuum cleaner, etc. If left unattended (without grounding to the floor), the control means detects that the suction tool is not grounded on the surface to be cleaned from the output information of the ground detection means, and controls the drive state of the electric blower to be low. To do. If the inspection means determines that an abnormality has occurred, it operates so as not to allow the transition to the standby mode, so the control means detects from the output information of the ground detection means that the suction tool is not grounded on the surface to be cleaned. Even so, the driving state is maintained without lowering the driving state to the electric blower, so the user is not cleaning, and when the state of the electric blower for cleaning is not necessary, The drive state of the electric blower can be lowered, power saving and noise reduction can be realized, and when the grounding detection means has a failure such as a failure, the cleaning performance in a situation where cleaning must be performed is reduced. Therefore, it is possible to realize a vacuum cleaner that achieves both energy saving, noise reduction, and usability.

  In the second invention, in particular, the inspection means of the first invention determines whether or not the grounding detection means can detect grounding in the stop mode. Before the user starts cleaning, the grounding detection means determines whether the grounding detection is possible. The determination result of whether or not the detection means is normal is clear, and the operation mode can be shifted to the operation mode by the user's operation to start cleaning, and at the same time, the electric blower driving state suitable for the cleaning situation can be quickly set.

  In the third invention, in particular, the inspection means of the first invention determines whether or not the ground detection means can detect the ground when shifting from the stop mode to the operation mode or almost immediately thereafter. It is possible to determine the state of the ground contact detection means immediately before starting the cleaning by shifting to the operation mode by the user's operation, and it is possible to improve the control accuracy of the driving state of the electric blower during cleaning.

  In the fourth aspect of the invention, in particular, the inspection means of the first aspect of the invention determines that it is abnormal unless the grounding state of the suction tool is detected for a predetermined time in the operation mode. Even if this occurs, the inspection by the inspection means can be performed, and further, the control accuracy of the driving state of the electric blower during cleaning can be improved.

  In particular, the fifth invention is a suction hose that can be attached to and detached from the main body according to any one of the first to fourth inventions, and an extension that is detachably connected to the hose at one end and to the suction tool at the other end. The tube and attachment / detachment detection means for detecting whether or not the suction tool is connected to the extension tube, and the determination by the detection information of the attachment / detachment detection means performed by the control means and the inspection of the inspection means are performed substantially simultaneously. It is possible to shift to standby mode immediately after that, and if the inspection result of the inspection means is normal, as soon as the suction tool is connected, it becomes possible to shift to standby mode, Energy saving can be improved.

  In the sixth invention, in particular, when the inspection means of any one of the first to fifth inventions determines that there is an abnormality in the ground detection means, the control means does not shift to the standby mode thereafter. Even if a failure occurs in the ground contact detection means, the driving state of the electric blower is not lowered, and the cleaning performance can be ensured.

  In the seventh aspect of the invention, in particular, when the inspection means of any one of the first to fifth aspects of the invention once determines that the ground detection means is abnormal and then determines that the ground detection is possible, the abnormality is detected. It is released and the transition to the standby mode is permitted. When a temporary malfunction occurs in the ground detection means, the cleaning performance can be ensured and the ground detection means can detect normally. In this case, energy saving and silent operation become possible, so that energy saving, noise reduction and cleaning performance can be compatible, and usability can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

(Embodiment 1)
Hereinafter, the vacuum cleaner in the 1st Embodiment of this invention is demonstrated, referring FIGS. 1-3.

  FIG. 1 is an external view of the vacuum cleaner in the present embodiment, and FIG. 2 is a block diagram of a circuit configuration of the vacuum cleaner.

  In FIG. 1, 1 is an electric vacuum cleaner main body (hereinafter referred to as “main body 1”) that incorporates an electric blower 2 that generates a suction force. A hose 3 provided with an operation portion 4 capable of setting the suction force) at its distal end is detachably connected. The distal end of the hose 3 is connected to an extension tube 5 and further to the distal end of the extension tube 5. Also, a floor suction tool 6 (hereinafter referred to as “suction tool 6”), which is capable of sucking dust in contact with the surface to be cleaned, is also detachably connected.

  An air intake path 9 is formed by the hose 3, the extension pipe 5, and the suction tool 6, and dust or the like sucked from the suction tool 6 passes through the air intake path 9 and is disposed in the front portion of the main body 1. Will be led to 7. The suction tool 6 in the present embodiment incorporates an electric motor 14 and a rotating brush 8 that is rotationally driven by the electric motor 14 via a belt or the like (not shown) to sweep up dust on the surface to be cleaned.

  In FIG. 2, reference numeral 16 denotes a microcomputer, which realizes control means to be described later for controlling the driving state of the electric blower 2 and inspection means for inspecting the grounding detection means. The microcomputer 16 is built in the main body 1 and detects an operation mode signal Vt from the operation unit 4 operated by a user, and outputs a drive signal to the drive means A10 and the drive means B11, and the electric blower 2 and Each of the electric motors 14 has an operation mode (strong / medium / weak) for controlling the phase of the commercial power supply 13 and controlling the electric blower 2 and the electric motor 14 to a drive state, and a stop mode (off) for stopping the motor. Drive control.

  Reference numeral 12 denotes power supply means for supplying power to control-related circuits such as the microcomputer 16. The Vin of the microcomputer 16 is configured such that when the driving means B11 is not supplying power to the electric motor 14, a voltage signal divided by the parallel connection resistance value of the resistor R5 and the resistor R6 and the resistor R2 can be input. Yes.

  15 is a grounding detection switch means that closes when the suction tool 6 is grounded (landing) on the floor surface to be cleaned so as to be able to suck dust on the floor surface, and opens when the suction tool 6 leaves the floor. The ground detection means is configured by being inserted on the power supply line to and connected to the resistor R6.

  When the drive unit B11 performs phase control to supply power to the motor 14, the ground detection switch unit 15 is closed to supply power to the motor 14, and conversely, when the circuit is opened, the motor 14 is opened. The power supply to is cut off, and the drive of the electric motor 14 is stopped. That is, when the driving means B11 is operating to supply power to the electric motor 14, when the suction tool 6 is in contact with the surface to be cleaned, the rotating brush 8 rotates and the suction tool 6 is brought into contact with the surface to be cleaned. When not in contact with the ground (leaving the floor), the rotation of the rotary brush 8 is stopped. The resistor R5 is connection detection means that can detect the presence or absence of connection of the suction tool 6 by partial pressure with the resistor R2.

  The operation and action of the electric vacuum cleaner configured as described above will be described with reference to FIG.

  First, when the microcomputer 16 detects from the output information of the ground detection means (the combination of the ground detection switch means 15 and the resistor R6) that the suction tool 6 is not grounded on the surface to be cleaned, the driving state of the electric blower 2 is lowered. A state, that is, a control operation for reducing the power supply by phase control will be briefly described.

  In the vacuum cleaner to which all the components are connected as shown in FIG. 1, when the user operates the operation unit 4, the microcomputer 16 is operated from the operation information signal Vt to, for example, the strong operation mode. Is detected, a control signal is output to the drive means A10 so that the power supplied to the electric blower 2 is maximized, and a predetermined drive signal is output to the drive means B11 in order to drive the motor 14 (FIG. 3 ( (See the motor drive signal in a)).

  The motor drive signal is output so as to phase-control the power supplied to the motor 14 for a predetermined time (T1) from the zero cross timing of the commercial power supply waveform (see FIG. 3A). With this drive signal output, the microcomputer 16 causes the voltage signal in which Vss (the power supply voltage of the microcomputer 16) is divided by the parallel connection resistance value of the resistors R5 and R6 and the resistance value of the resistor R2 during the period T1. Vin can be detected.

  Vin in the period of T1 is shown in FIG. 3 (depending on the closed circuit state of the ground detection switch means 15 and whether or not the suction tool 6 is connected to the extension pipe 5, that is, whether or not the resistor R5 and the resistor R6 are connected. It changes as shown in b).

  Incidentally, the details of the voltage signal Vin under each condition (the following (1) to (3)) can be roughly calculated as follows.

(1) When the ground detection switch means 15 is closed,
Vin = Vss × [1 ÷ (1 / R5 + 1 / R6) + R2] × R2 = V1
(2) When the ground detection switch means 15 is open,
Vin = Vss × [1 ÷ (1 / R5) + R2] × R2 = V2
(3) When the suction tool 6 is not connected,
Vin = Vss
As described above, the microcomputer 16 can determine each connection condition from the value of Vin. For example, in the case of the condition (2), the vacuum cleaner cannot suck the dust on the floor to be cleaned. The power supply to the electric blower 2 (including the electric motor 14) is controlled to be low or stopped by discriminating the state, and wasteful power consumption and noise generation are prevented.

  Hereinafter, a state where the power supplied to the electric blower 2 is lowered or stopped is referred to as a standby mode. Further, the determination includes the time element in the value of Vin (for example, it is determined that the standby mode transition condition is satisfied when the condition (2) continues to be satisfied for a predetermined time), so that the control becomes more reliable. Needless to say (Vin during the period other than T1 is a voltage signal obtained by clipping the voltage close to the commercial power supply 13 with D1, so the microcomputer 16 is detected as Vdd or Vss equivalent voltage. Needless to say.

  By detecting the grounding state of the suction tool 6 to the surface to be cleaned and controlling the driving state of the electric blower 2 as described above, the user suddenly cleans the floor surface with the electric vacuum cleaner. If you have to do other things and leave it in the operating mode (however, the suction tool 6 does not touch the surface to be cleaned) or lift and move the suction tool 6 6 is detected to be not in contact with the surface to be cleaned, that is, it is determined that the driving state of the electric blower 2 for cleaning is not necessary, and the electric blower 2 is driven in a low state. The mode can be shifted to realize energy saving and silent operation.

  By the way, when the ground detection switch means 15 is operating normally, as described above, only in a situation where the user is not cleaning, the mode shifts to the standby mode in which the power supplied to the electric blower 2 is reduced. Although energy saving and silent operation can be performed, for example, a failure occurs in the ground detection switch means 15 and the open circuit state occurs even though the suction tool 6 is grounded on the surface to be cleaned. If the operation continues, even if the user tries to clean the surface to be cleaned, the user unintentionally shifts to the standby mode, cannot obtain a sufficient suction force, and the cleaning performance is deteriorated.

  This is the same phenomenon when the resistor R6 fails in the open mode. The microcomputer 16 determines the value of Vin as the operation of the inspection unit before determining the shift to the standby mode based on the value of Vin. The transition to the standby mode is controlled so as to be effective only in the operation mode in which electric power is supplied to the electric blower 2, and in the stop mode, the transition to the standby mode is controlled.

  In the stop mode, the microcomputer 16 checks whether the value of Vin is V1 (condition (1)) periodically (for example, every second). V1 (condition (1)) means that the ground detection switch means 15 is closed, and the path to the resistor R6 and Vin is normal, so the ground detection means determines that it is normal. . In this case, after that, when the user operates the operation unit 4 and shifts to the operation mode (for example, strong), the microcomputer 16 permits the shift to the standby mode, and the suction tool 6 leaves the floor and detects the ground contact. When the switch means 15 is opened, the standby mode can be entered as described above.

  In the stop mode, Vin is V2 (condition (2)) under the following conditions.

Condition a: When the suction tool 6 leaves the floor Condition b: When the grounding detection switch means 15 cannot be closed Condition c: Failure of the resistor R6 (open mode)
The condition a is generated by the usage of the user. Normally, before the user starts cleaning, even if the user is in the stop mode, the vicinity of the operation unit 4 of the hose 3 is gripped. 6 is a very rare pattern because it is grounded on the surface to be cleaned, and is not a malfunction as a vacuum cleaner. However, in stop mode, the microcomputer 16 confirms Vin as an inspection means at the timing. If it is a, it is determined that it is not normal once.
Although condition b is a malfunction as a vacuum cleaner, there are cases where it becomes electrically open or cannot be closed mechanically. For example, dust on the surface to be cleaned is mechanically caught and cannot be closed. A temporary failure and a permanent failure which is not so are considered, but the condition b is once judged not to be normal.

  The condition c is a permanent condition as a vacuum cleaner, is a complete failure, and is a condition for determining that the microcomputer 16 is not normal.

  Among the above three conditions, it is rare to determine that the microcomputer 16 is not normal under the condition a, and the rotating brush 8 rotates in any case in the temporary malfunction state that occurs under the condition b. In the state where the original cleaning performance cannot be exhibited without the cleaning ability must be supplemented with the suction force of the electric blower 2, and the remaining state and the condition c of the condition b are a complete failure. By controlling so as not to shift to the standby mode, even if a malfunction occurs without causing any trouble in actual use, the cleaning performance can be maintained without deteriorating.

  In addition, when the microcomputer 16 performs an inspection with an input at Vin during the stop mode, and the inspection determination result is normal, the user lifts the suction tool 6 immediately after shifting to the operation mode and leaves the floor. In this case, it is possible to immediately shift to the standby mode and improve the energy saving performance.

  Further, the ground detection immediately before the operation mode transition is performed by the microcomputer 16 performing a permission determination after the user operates the operation unit 4 until the operation mode is shifted to the transition to the operation mode. By checking the means, the inspection can be performed at a point closer to the cleaning timing, and the accuracy of the standby mode permission determination can be improved.

  By the way, if the microcomputer 16 tries to determine permission to shift to the standby mode based on the Vin signal, it cannot be determined unless the suction tool 6 is connected to the extension pipe 5 or the hose 3. The microcomputer 16 performs determination processing on the order of μ seconds to m seconds for Vin, and the signal input to Vin is a signal obtained by dividing the resistance, so that the combined resistance changes. The voltage of Vin due to this also immediately follows, so that the suction tool 6 is connected, and until the microcomputer 16 recognizes that the suction tool 6 is connected and decides permission to enter the standby mode, a slight amount is required. Only time is required and judgment is made almost simultaneously.

  Therefore, when the suction tool 6 is connected, the user immediately operates the operation unit 4 to shift to the operation mode, and immediately after the suction tool 6 is in the state of getting out of bed, if the inspection result is normal, Control can be performed so as to shift to the standby mode, energy savings can be further improved, and it is possible to quickly shift to silent operation.

  Here, if the microcomputer 16 determines that there is a problem with the ground detection means under the above-described condition a and shifts to the operation mode in a state where the shift to the standby mode is not permitted, the user may have cleaned it. For example, the suction tool 6 is grounded to the surface to be cleaned, and in that case, Vin is also V1 (condition (1)). This is a signal at a level that is determined to be normal if it is input at the timing of the inspection, and is in a normal state as a vacuum cleaner, and is in a state in which the ground detection means can detect grounding and getting out of bed. I can judge.

  After the microcomputer 16 determines that the initial determination is not normal (Vin = V2), if Vin = V1, the microcomputer 16 determines that the grounding and bed leaving can be detected, and the first non-normal test result. Can be compensated for temporary judgment under the condition a, and the accuracy of the inspection can be improved by controlling so that the transition to the standby mode is permitted. it can.

  This is the same for the temporary failure state that occurs in the condition b. For example, after the user determines that the malfunction is not normal, the user may, for example, collect dust on the ground detection switch means 15 during use in the operation mode. If the state that could not be closed due to biting is released by the removal of dust and can be closed, a similar signal change occurs in Vin, and it is determined that grounding and bed leaving can be detected. be able to. In this configuration, the respective effects can be maximized while achieving both energy saving performance, silent operation and cleaning performance in accordance with the normality and failure status of the ground contact detection means.

  As an example of the cause of the temporary failure state that occurs in the condition b, the dust detection unit 15 is bitten by dust, but this state is normal even when cleaning is started. It may also occur during cleaning. Then, contrary to the intention that the user intends to clean the surface to be cleaned with the suction tool 6, the user enters the standby mode, and the cleaning performance cannot be obtained.

  The microcomputer 16 measures the time during which Vin = V2 during the operation mode, and determines that the inspection result is not normal when a predetermined time or more has elapsed, so that a malfunction that occurs during cleaning can also be detected. Can be detected. In this case, the driving state of the electric blower 2 is the low driving state operation in the standby mode. Therefore, when it is determined that there is a problem, the driving state before the transition to the standby mode may be restored, or the stop mode is set. The standby mode may be maintained until the transition.

  In the former case, if the predetermined time is set shorter than the time for the user to leave in the operation mode or the time for lifting and moving the suction tool 6, the standby mode is intentionally set in spite of the intentional standby mode. However, it is preferable to set the predetermined time longer. However, if the ground detection switch means 15 is dusted, the cleaning performance can be recovered quickly. is there.

  In the latter case, if the predetermined time is set to be shorter than the time for the user to leave the operation mode or the time for lifting and moving the suction tool 6, the standby mode is erroneously determined as an abnormal state. However, there is a demerit that the cleaning performance is lowered until the mode is changed to the stop mode. However, in the standby mode state, the state can be maintained, so that energy saving can be ensured.

  However, once in the stop mode, immediately before shifting to the operation mode again, as described above, the state of the suction tool 6 is normally a grounded state and is a condition for shifting to the standby mode. If the suction tool 6 is not out of bed and dust has not been caught in the previous time and it has been misjudged, the inspection result will be updated normally, and after the transition to the operation mode, it will depend on the situation of the ground detection means Control as intended. If biting has occurred and biting has continued even after the transition to the operation mode, the determination result that the bit is not normal is continued, and a state in which the shift to the standby mode is not permitted can be continued.

  In addition, when the attachment / detachment of the suction tool 6 is detected by the resistor R5 and the suction tool 6 is not attached, by controlling so as not to enter the standby mode, for example, from the resistor R6 or the resistor R5 to Vin Even when an abnormality (open mode) occurs in the signal path, the cleaning performance can be maintained without deteriorating.

  As described above, according to the present embodiment, when the ground contact detection means is normal, or when the malfunction state is released, it is possible to promptly save energy and shift to the silent operation state, and When there is a defect, it is possible to provide an excellent vacuum cleaner that can maintain energy efficiency and performance, and can maintain the cleaning performance without deteriorating.

  As described above, the vacuum cleaner according to the present invention does not deteriorate the cleaning performance even if the switch means or the grounding detection means fails or a temporary operation failure occurs, and there is no failure or When a temporary malfunction is resolved, it is possible to quickly switch to an energy-saving state that can improve the energy-saving performance without adversely affecting the cleaning performance. Applicable to various vacuum cleaners.

External view of the electric vacuum cleaner in Embodiment 1 of this invention Circuit block diagram of the vacuum cleaner (A) Explanatory drawing (information signal outline explanatory drawing) of the information signal of the earthing | grounding detection means and forced stop cancellation | release condition of the vacuum cleaner, (b) The elements on larger scale of the information signal

Explanation of symbols

1 Main body of vacuum cleaner (main unit)
2 Electric blower 3 Hose (including operation unit)
4 Operation part 5 Extension pipe 6 Floor suction tool (suction tool)
10 Drive means A
11 Driving means B
12 Power supply means 13 Commercial power supply 14 Electric motor 15 Ground detection switch means (ground detection means)
16 Microcomputer (control means, inspection means)
R5 resistance (connection detection means)
R6 resistance (grounding detection means)

Claims (7)

An electric blower that is housed in the main body and generates a suction force, an operation unit that sets an operation mode, a suction tool that includes a grounding detection unit that detects whether there is a ground contact with the surface to be cleaned, and the operation unit. An operation mode for supplying electric power according to the operation mode to the electric blower and a control unit for controlling the electric blower having a stop mode in which no electric power is supplied, and the control means is operating in the operation mode. When the grounding detection means detects that the suction tool is not grounded on the surface to be cleaned, a standby mode in which the power supplied to the electric blower is reduced or stopped, and the grounding detection means is in contact with the surface to be cleaned. The electric blower has inspection means for determining whether or not the presence / absence of grounding can be normally detected and the inspection means determines that the grounding detection means can detect grounding. Reduction of supplied power or electric vacuum cleaner to perform the stop. The electric vacuum cleaner according to claim 1, wherein the inspection means determines whether or not the ground detection means can detect the ground when in the stop mode. 2. The electric vacuum cleaner according to claim 1, wherein the inspection means determines whether or not the ground detection means can detect the ground when shifting from the stop mode to the operation mode or almost immediately thereafter. The electric vacuum cleaner according to claim 1, wherein the inspection means determines that an abnormality occurs unless the grounding state of the suction tool is detected for a predetermined time in the operation mode. A suction hose that can be attached to and detached from the main body, an extension pipe that is detachably connected to the hose at one end and a suction tool at the other end, and detects whether the suction tool is connected to the extension pipe The determination according to the detection information of the attachment / detachment detecting means performed by the control means and the inspection of the inspection means are performed substantially simultaneously, and the transition to the standby mode can be performed immediately thereafter. An electric vacuum cleaner given in any 1 paragraph. The vacuum cleaner according to any one of claims 1 to 5, wherein when the inspection means determines that the ground contact detection means is abnormal, the control means performs control so as not to shift to the standby mode. 6. The inspection device according to any one of claims 1 to 5, wherein when the inspection means determines that the ground detection means is abnormal and then determines that the ground detection is possible, the abnormality is canceled and the transition to the standby mode is permitted. A vacuum cleaner according to claim 1.

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