JP6492282B2 - Electric vacuum cleaner - Google Patents

Description

  The present invention relates to an AC / DC vacuum cleaner that operates on both a commercial power source and a secondary battery.

  2. Description of the Related Art Conventionally, this type of AC / DC vacuum cleaner has been proposed to automatically switch between AC and DC power sources using a switching unit. As a result, it is possible to save the user from switching manually and improve the user-friendliness.

  That is, the switching part of the AC / DC power supply of the conventional vacuum cleaner is composed of a single switching element such as a relay. The single switching element is turned on when commercial power is supplied and connected to the AC circuit, and is turned off when commercial power is shut off and connected to the DC circuit. In addition, a configuration comprising a mechanical switch that is switched by attaching and detaching the power connector portion of the power cord connected to the cleaner body and the power connector portion of the cleaner body is disclosed as the AC / DC power supply switching portion. (For example, refer to Patent Document 1).

JP 2001-321307 A

  However, in the case of a vacuum cleaner using a mechanical switch, the vacuum cleaner main body is enlarged. Therefore, it is preferable to use a single switching element as the switching unit of the AC / DC power supply because the main body of the vacuum cleaner can be reduced in size, and user convenience is good.

  However, when the electric vacuum cleaner having the above configuration is operated with a commercial power source, if the power cord is disconnected and the supply of the commercial power source is cut off against the user's intention, the operation is automatically switched to the operation with the DC power source. . Therefore, the battery life of a DC power source such as a secondary battery is reduced. Therefore, it is desirable to stop the operation of the electric blower when the supply of the commercial power source is cut off while the electric vacuum cleaner is being operated with the commercial power source.

  The circuit operation of a conventional AC / DC vacuum cleaner using a single switching element will be described below with reference to FIG. FIG. 5 is a control block diagram of a conventional vacuum cleaner.

  As shown in FIG. 5, the conventional vacuum cleaner realizes switching of AC / DC power supply by a single switching element 22.

  Specifically, when the commercial power supply 8 is supplied, the single switching element 22 is turned on and connected to the AC circuit. On the other hand, when the commercial power supply 8 is cut off, the single switching element 22 is turned off and connected to a DC circuit (DC power supply).

However, the vacuum cleaner having the above configuration switches between an AC circuit (commercial power supply) and a DC circuit (DC power supply such as a secondary battery) with a single switching element 22. Therefore, when vibration is applied during use of the vacuum cleaner, the switching element 22 may be separated from the contact due to the vibration. In particular, the switching element 22 composed of a relay or the like is likely to be separated from the contact by vibration in the off state compared to the on state. That is, when the switching element 22 is connected to the DC circuit in the off state, the switching element 22 is easily separated from the contact point due to vibration applied to the vacuum cleaner. As a result, there is a problem that a spark occurs between the contact and the switching element 22 and the switching element 22 deteriorates.

  An object of this invention is to provide the vacuum cleaner which can reduce that a switch leaves | separates from a contact even when a vibration is added to a vacuum cleaner.

In order to solve the above-described conventional problems, the vacuum cleaner of the present invention supplies power to the electric blower from a main body of the vacuum cleaner, a secondary battery built in the main body of the vacuum cleaner, and a commercial power source. A first drive unit, a second drive unit that supplies power from the secondary battery to the electric blower, a first switching unit connected in series to the first drive unit, and a second drive unit in series A second switching unit, a first driving unit, a second driving unit, a first switching unit, a control unit for controlling the second switching unit, and a zero cross for detecting a zero cross of a commercial power source And when the zero cross is detected by the zero cross detection unit, the control unit determines that the commercial power source is used for driving, turns on the first drive unit and the first switching unit, and performs the second drive. Department and second scan When the zeroing cross is not detected by the zero cross detection unit when the chucking unit is controlled to be in the off state, it is determined to be driven by the secondary battery, and the first driving unit and the first switching unit are turned off and the second driving unit The second switching unit is controlled to be in an ON state , the first driving unit is a bidirectional thyristor, the second driving unit is a MOS-FET, and the first switching unit and the second switching unit are relays. Have

According to this configuration, when the electric blower is driven by a commercial power source, either the first switching unit or the second switching unit can be used in either the on state or the secondary battery. . Therefore, even when vibration is applied to the vacuum cleaner, the first switching unit and the second switching unit are unlikely to be separated from the contacts. Thereby, generation | occurrence | production of a spark can be suppressed between a contact, a 1st switching part, and a 2nd switching part. As a result, it is possible to realize a highly reliable vacuum cleaner while suppressing deterioration of the first switching unit and the second switching unit.
In addition, by providing a zero cross detection unit that detects a zero cross of the commercial power supply, the control unit determines that the zero cross is detected by the zero cross detection unit and is driven by the commercial power source, and the zero cross is not detected by the zero cross detection unit. It can be determined that the battery is driven by a secondary battery, and the user can perform an operation that the user intends without manually selecting whether the vacuum cleaner is operated by a commercial power source or a secondary battery. .
In addition, since the first drive unit is a bidirectional thyristor, the second drive unit is a MOS-FET, and the first switching unit and the second switching unit are relays, the control unit can easily turn on Further, the vacuum switch can be miniaturized because the first switching unit and the second switching unit use a single switching element without using a mechanical switch that is switched by attachment and detachment.

Even when vibration is applied to the vacuum cleaner, the switch is less likely to leave the contact point, thereby suppressing the occurrence of sparks between the contact point and the switch, thereby suppressing deterioration of the switch, and a highly reliable vacuum cleaner. Can be realized.

FIG. 1 is an external perspective view of a vacuum cleaner according to an embodiment of the present invention. FIG. 2 is a control block diagram in a state where the electric vacuum cleaner is operated by a commercial power source. FIG. 3 is a control block diagram of a state where the vacuum cleaner is operated by a secondary battery. FIG. 4 is a flowchart for explaining a control operation in the vacuum cleaner. FIG. 5 is a control block diagram of a conventional vacuum cleaner.

  Hereinafter, preferred embodiments of a vacuum cleaner of the present invention will be described in detail with reference to the drawings. In the following description, the same or corresponding parts are denoted by the same reference numerals, and redundant description is omitted. Further, the present invention is not limited by this embodiment.

(Embodiment)
Below, the structure of the vacuum cleaner in embodiment of this invention is demonstrated using FIG.

  FIG. 1 is an external perspective view of a vacuum cleaner according to an embodiment of the present invention.

  As shown in FIG. 1, the vacuum cleaner of this Embodiment is comprised from the vacuum cleaner main body 1, the hose 4, the extension pipe | tube 6, the suction tool 7, etc. at least.

  The vacuum cleaner body 1 includes an electric blower 2, a dust collecting container 3, a power cord 23, a secondary battery (not shown), and the like. The electric blower 2 is built in the rear part of the cleaner body 1 and generates suction air that sucks in dust. The dust collecting container 3 is disposed at the upstream side of the electric blower 2 at the front portion of the cleaner body 1 and collects dust sucked by the suction air. The power cord 23 is provided at the rear of the cleaner body 1 so as to be able to be pulled out, and is connected to the commercial power source 8 through an outlet (not shown). The power cord 23 supplies power from the commercial power supply 8 to a control board (not shown) built in the cleaner body 1.

  Further, the hose 4 is connected to the cleaner body 1 at one end side, and the other end side is connected to one end side of the extension pipe 6. At the tip of the other end of the hose 4, a hand operating unit 5 that can select various operation modes (for example, suction force such as strong / weak / stop) is provided.

  And the vacuum cleaner of this Embodiment makes the electric blower 2 the commercial power supply 8 according to the switching state of the switching part (not shown) which switches the alternating current / direct current power supply mentioned later by selection operation of the hand operation part 5. Or it is rotated by the secondary battery 9. Thereby, it is comprised so that dust may be guide | induced to the dust collecting container 3 via the suction tool 7, the extension pipe | tube 6, and the hose 4 from cleaning surfaces, such as a floor surface.

  Hereinafter, the AC / DC control operation of the vacuum cleaner in the present embodiment will be described with reference to FIGS. 2 and 3.

  FIG. 2 is a control block diagram showing a state where the vacuum cleaner is operated by a commercial power source. FIG. 3 is a control block diagram in a state where the vacuum cleaner is operated by a DC power source.

  As shown in FIGS. 2 and 3, the control block of the vacuum cleaner of the present embodiment includes at least a control unit 13, a first switching unit 15, a first drive unit 17, and a control board 10. The second switching unit 16, the second drive unit 18, the zero cross detection unit 12, the power supply circuit 11, the hand operation unit reception unit 14, and the like are configured. The control unit 13 is composed of, for example, a microcomputer (hereinafter referred to as “microcomputer”) and controls the overall operation of the electric vacuum cleaner. The 1st switching part 15 and the 1st drive part 17 supply electric power to the electric blower 2 from the commercial power supply 8 which is AC power supply. The first drive unit 17 is configured by, for example, a bidirectional thyristor 17 and the like, and will be described as “bidirectional thyristor” below. The 2nd switching part 16 and the 2nd drive part 18 supply electric power to the electric blower 2 from the secondary battery 9 which is DC power supply. The second drive unit 18 is composed of a MOS-FET or the like, and will be described below as “MOS-FET”. The zero cross detector 12 detects a zero cross when power is supplied from the commercial power supply 8. The power supply circuit 11 generates a power supply for the microcomputer 13 and the relay. The hand operation part reception part 14 receives the instruction | indication from the hand operation part 5 provided in the hose 4 shown in FIG.

  The first switching unit 15 is connected to the bidirectional thyristor 17 in series. Similarly, the second switching unit 16 is connected in series to the MOS-FET 18.

  Further, as shown in FIGS. 2 and 3, the first switching unit 15 and the second switching unit 16 are connected to the contacts when in the on state. And when it is an OFF state, it is comprised so that it may not connect with any contact. Specifically, FIG. 2 shows a state in which the first switching unit 15 is connected to the contact in the on state, and the second switching unit 16 is in the off state and is not connected to any contact. On the other hand, FIG. 3 shows a state in which the second switching unit 16 is connected to the contact in the on state, and the first switching unit 15 is in the off state and is not connected to any contact.

  Next, a circuit configuration when operating the vacuum cleaner with alternating current will be described with reference to FIG.

  When power is supplied from the commercial power supply 8, each component is connected as shown by a thick solid line in FIG.

  Specifically, first, when the microcomputer 13 receives an operation instruction from the hand operation unit 5, the microcomputer 13 detects the zero cross by the zero cross detection unit 12. Thereby, the microcomputer 13 determines that power is supplied from the commercial power supply 8.

  Then, the microcomputer 13 turns on the first switching unit 15 and turns on the bidirectional thyristor 17. Thereby, electric power is supplied to the electric blower 2 from the commercial power supply 8, and a vacuum cleaner is operated.

  In the present embodiment, relays are used for the first switching unit 15 and the second switching unit 16. In the operation of the vacuum cleaner, when the vibration is applied to the vacuum cleaner, the relay may be switched because the switch is separated from or attached to the contact. In particular, it is likely to occur when the switch is in an off state where the switch is not electrically attracted to the contact.

  However, in the present embodiment, for example, even when the second switching unit 16 is turned on from the off state due to vibration of the vacuum cleaner, no current flows because the MOS-FET 18 is off. On the other hand, since the first switching unit 15 is in the ON state, the switch is electrically drawn to the contact. For this reason, even when vibration is applied to the vacuum cleaner, the switch is unlikely to leave the contact. That is, it is difficult for a spark to occur between the contact and the switch. As a result, deterioration of the switch of the first switching unit 15 can be prevented.

  Next, the circuit configuration when operating the vacuum cleaner with direct current will be described in detail with reference to FIG.

  When power is not supplied from the commercial power supply 8, each component is connected as shown by a thick solid line in FIG.

  Specifically, first, when the microcomputer 13 receives an operation instruction from the hand operation unit 5, the microcomputer 13 detects that the zero cross is not detected by the zero cross detection unit 12. Thereby, the microcomputer 13 determines that power is supplied from the secondary battery 9.

  Then, the microcomputer 13 turns on the second switching unit 16 and turns on the MOS-FET 18. Thereby, electric power is supplied from the secondary battery 9 to the electric blower 2, and the electric vacuum cleaner is operated.

  At this time, in the present embodiment, even when the first switching unit 15 is turned on from the off state due to vibration of the vacuum cleaner, no current flows because the bidirectional thyristor 17 is off. On the other hand, since the second switching unit 16 is in the on state, the switch is electrically attracted to the contact. For this reason, even when vibration is applied to the vacuum cleaner, the switch is unlikely to leave the contact. That is, it is difficult for a spark to occur between the contact and the switch. As a result, deterioration of the switch of the second switching unit 16 can be prevented.

  As described above, the electric vacuum cleaner according to the present embodiment is less likely to generate a spark between the contact and the switch when operated by the commercial power supply 8 or when operated by the secondary battery 9. Therefore, deterioration of the switches of the first switching unit 15 and the second switching unit 16 can be prevented.

  As described above, the electric vacuum cleaner of the present embodiment is configured and operates.

  Below, operation | movement and an effect | action of the vacuum cleaner of this Embodiment are demonstrated using FIG.

  FIG. 4 is a flowchart for explaining a control operation in the vacuum cleaner.

  As shown in FIG. 4, first, when the operation of the vacuum cleaner is instructed by the hand operation unit 5 (step S1), the microcomputer 13 determines whether or not zero cross is detected via the zero cross detection unit 12 (step S1). S2). At this time, if a zero cross is detected (Yes in step S2), the microcomputer 13 determines that the operation is performed by the commercial power source 8, and starts the operation of the vacuum cleaner by the commercial power source 8 (step S3).

  Next, the microcomputer 13 determines whether or not there is an instruction to stop the operation of the vacuum cleaner by the hand operation unit 5 (step S4). At this time, when the operation stop is instructed (Yes in step S4), the operation of the vacuum cleaner is stopped (step S9).

  On the other hand, when operation stop is not instructed (No in step S4), it is determined whether or not zero cross is detected (step S5). If a zero cross is detected at this time (Yes in step S5), the process returns to step S3 and the subsequent step operations are repeated.

  On the other hand, when the zero cross is not detected (No in step S5), the microcomputer 13 disconnects the power cord 23 when the commercial power supply 8 is operated even though the user has not operated to stop the operation. Judge that Then, the operation of the vacuum cleaner is stopped (step S9).

  If zero cross is not detected in step S2 (No in step S2), the microcomputer 13 determines that the operation is performed by the secondary battery 9, and starts the operation of the vacuum cleaner by the secondary battery 9 (step S2). S6).

  Next, the microcomputer 13 determines whether or not there is an instruction to stop the operation of the vacuum cleaner by using the hand operation unit 5 (step S7). At this time, when the operation stop is instructed (Yes in step S7), the operation of the vacuum cleaner is stopped (step S9).

  On the other hand, when operation stop is not instructed (No in step S7), the microcomputer 13 determines whether or not zero cross is detected (step S8). At this time, when the zero cross is not detected (No in step S8), the process returns to step S6 and the subsequent step operations are repeated.

  On the other hand, when the zero cross is detected (Yes in step S8), the microcomputer 13 determines that the user has inserted the power cord 23 into the outlet when the operation by the secondary battery 9 is being performed. Then, the operation of the vacuum cleaner is stopped (step S9).

  As described above, according to the present embodiment, when the electric vacuum cleaner is operated with the commercial power supply 8, the power cord 23 is disconnected and the supply of the commercial power supply 8 is cut off against the intention of the user. , Stop the operation of the vacuum cleaner. Similarly, when the power supply cord 23 is inserted into the commercial power source 8 and the commercial power source 8 is supplied while the secondary battery 9 is operating the vacuum cleaner, the operation of the vacuum cleaner is stopped. Therefore, during operation of the electric vacuum cleaner with the commercial power source 8, it is prevented that the operation is automatically switched to the operation with the DC power source. Thereby, the fall of the battery life of DC power supplies, such as the secondary battery 9, can be suppressed.

  For example, when the power plug of the power cord is half inserted into the outlet, the supply and shutoff of the commercial power supply 8 are repeated. In this case, the vacuum cleaner of the present embodiment stops operation. Thereby, generation | occurrence | production of the spark between plugs or between a contact and each switching part can be prevented. As a result, a highly reliable vacuum cleaner can be realized.

  Furthermore, the microcomputer 13 turns on one of the first switching unit 15 and the second switching unit 16 after receiving the operation instruction of the hand operation unit 5. Therefore, when it is not desired to drive the electric blower 2, it is not necessary to supply power to each switching unit. As a result, a vacuum cleaner with low standby power can be realized.

  As described above, the electric vacuum cleaner according to the present invention includes a vacuum cleaner main body incorporating an electric blower, a secondary battery incorporated in the vacuum cleaner main body, and a first power supply for supplying electric power from a commercial power source to the electric blower. A drive unit, and a second drive unit that supplies electric power from the secondary battery to the electric blower. Furthermore, a first switching unit connected in series to the first driving unit, a second switching unit connected in series to the second driving unit, a first driving unit, a second driving unit, A first switching unit and a control unit for controlling the second switching unit. The first driving unit and the first switching unit, and the second driving unit and the second switching unit are connected in parallel. Further, when the electric blower is driven by a commercial power source, the control unit turns on the first drive unit and the first switching unit and controls the second drive unit and the second switching unit in the off state. When the electric blower is driven by the secondary battery, the first drive unit and the first switching unit may be turned off and the second drive unit and the second switching unit may be controlled to be turned on. .

  According to this configuration, when the electric blower is driven by a commercial power source, either the first switching unit or the second switching unit can be used in either the on state or the secondary battery. . Therefore, even when vibration is applied to the vacuum cleaner, the first switching unit and the second switching unit are unlikely to be separated from the contacts. Thereby, generation | occurrence | production of a spark can be suppressed between a contact, a 1st switching part, and a 2nd switching part. As a result, it is possible to realize a highly reliable vacuum cleaner while suppressing deterioration of the first switching unit and the second switching unit.

  Moreover, the vacuum cleaner main body of the vacuum cleaner of this invention is equipped with the zero cross detection part which detects the zero cross of a commercial power source. When the zero cross is detected by the zero cross detection unit, the control unit determines that the commercial power source is used for driving, turns on the first drive unit and the first switching unit, and turns the second drive unit and the second drive unit on. The switching unit is controlled to be turned off. On the other hand, when the zero cross is not detected by the zero cross detection unit, the control unit determines that the secondary battery is used for driving, turns off the first driving unit and the first switching unit, and sets the second driving unit and the second driving unit. The switching unit may be controlled to be on.

  Thereby, the operation | movement which a user intends can be performed, without a user selecting manually whether a vacuum cleaner operate | moves with a commercial power supply or a secondary battery.

  Moreover, the control part of the vacuum cleaner of this invention WHEREIN: When supply of the commercial power supply to an electric blower is cut | disconnected in the state in which the electric blower is driven with a commercial power supply, a 1st drive part and a 1st switching The electric blower is stopped by turning the second drive unit and the second switching unit to the off state while turning the unit off. On the other hand, when the commercial blower is supplied in a state where the electric blower is driven by the secondary battery, the first driving unit and the first switching unit are turned off and the second driving unit and the second switching unit are turned off. The switching unit may be turned off to stop the electric blower.

  Thereby, when the power plug is inserted into the outlet in a half-inserted state, and the supply and interruption of the commercial power supply are repeated, the operation of the electric blower can be stopped. As a result, it is possible to prevent the occurrence of sparks between the plugs or between the contact and each switching unit.

  Moreover, the control part of the vacuum cleaner of this invention may control a 1st switching part and a 2nd switching part to an OFF state, when the electric blower is not driven.

  Thereby, when it is not desired to drive an electric blower, it is not necessary to supply electric power to each switching part. As a result, standby power can be reduced.

  In the vacuum cleaner of the present invention, the first driving unit may be a bidirectional thyristor, the second driving unit may be a MOS-FET, and the first switching unit and the second switching unit may be configured by a relay. .

  Thereby, on-off control can be easily performed by the control unit. Furthermore, since the first switching unit and the second switching unit do not use mechanical switches that are switched by attachment and detachment and use a single switching element, the vacuum cleaner can be reduced in size.

  According to the present invention, in an AC / DC vacuum cleaner, regardless of how the user uses the vacuum cleaner, it is possible to prevent the occurrence of a spark and a decrease in battery life and to improve reliability. Therefore, the present invention can be applied to general household and industrial AC / DC vacuum cleaners.

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body 2 Electric blower 3 Dust collection container 4 Hose 5 Hand operation part 6 Extension pipe 7 Suction tool 8 Commercial power supply 9 Secondary battery 10 Control board 11 Power supply circuit 12 Zero cross detection part 13 Control part (microcomputer)
14 hand operation part reception part 15 1st switching part 16 2nd switching part 17 1st drive part (bidirectional thyristor)
18 Second drive unit (MOS-FET)
22 Switching element 23 Power cord

Claims (3)

A vacuum cleaner body with a built-in electric blower,
A secondary battery built in the vacuum cleaner body;
A first drive unit for supplying electric power from a commercial power source to the electric blower;
A second drive unit for supplying power from the secondary battery to the electric blower;
A first switching unit connected in series to the first drive unit;
A second switching unit connected in series to the second drive unit;
A control unit for controlling the first driving unit, the second driving unit, the first switching unit, and the second switching unit;
A zero-cross detector that detects a zero-cross of the commercial power supply,
When the zero cross is detected by the zero cross detection unit, the control unit determines to drive with the commercial power supply, turns on the first drive unit and the first switching unit, and turns on the second drive unit. And controlling the second switching unit to an off state,
When the zero cross is not detected by the zero cross detection unit, it is determined that the secondary battery is driven, the first driving unit and the first switching unit are turned off, and the second driving unit and the second driving unit are turned off. Control the switching part of the
The first driving unit is a bidirectional thyristor, the second driving unit is a MOS-FET, and the first switching unit and the second switching unit are relays . The control unit turns off the first drive unit and the first switching unit when the supply of commercial power to the electric blower is cut off while the electric blower is driven by the commercial power supply. And turning off the electric blower by controlling the second driving unit and the second switching unit to an off state,
In a state where the electric blower is driven by the secondary battery, the control unit turns off the first driving unit and the first switching unit when commercial power is supplied. The vacuum cleaner according to claim 1, wherein the electric blower is stopped by controlling the second driving unit and the second switching unit to be in an off state. The electric vacuum cleaner according to claim 1, wherein the control unit controls the first switching unit and the second switching unit to be in an off state when the electric blower is not driven.

Images