TW201601672A - Electric vacuum cleaner - Google Patents

Abstract

An electric vacuum cleaner includes: a body that generates suction air; an operation portion connected to the body; a suction portion for sucking dust which is connected to the operation portion, and has a rotation brush and a brush motor that drives the rotation brush; a first communication portion that is provided in the body and performs data communication with the operation portion; a body control portion that controls the first communication portion; a second communication portion that is provided in the operation portion and performs data communication with the first communication portion; an operation control portion that transmits data to the second communication portion; a reference potential line that provides reference potentials of the first and second communication portions and is used for supplying electric power to the brush motor; and a detection portion that detects an energization state of the brush motor. The body control portion causes data communication between the first and second communication portions based on a detection result of the detection portion within a period when a current flowing in the brush motor is a predetermined value or less.

Description

Electric vacuum cleaner

The present invention relates to an electric vacuum cleaner.

Patent Document 1 discloses an electric vacuum cleaner including a main body portion having an electric motor and generating suction air, an operation portion (remote control portion), and a brush portion. A brush motor that supplies electric power from the main body portion via the operation portion is provided in the brush portion.

[Prior patent documents] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 4-73033

A reference potential line for supplying a reference potential to the main body portion and the operation portion is provided. By causing the energization current of the brush motor to flow to the reference potential line, the number of lines can be reduced as compared with the case where the line for energizing current is separately provided with the reference potential line. However, when the energization current of the brush motor flows to the reference potential line, a voltage drop occurs due to the internal resistance of the reference potential line, and the reference potential fluctuates. Therefore, there is a problem that the communication accuracy between the main body portion and the operation portion is lowered.

The present invention has been made in order to solve the problems as described above, and an object of the present invention is to provide an electric vacuum cleaner which is The energizing current of the brush motor flows to the reference potential line to reduce the number of lines, and the communication accuracy can be prevented from being lowered.

The electric vacuum cleaner of the present invention comprises: a body portion for generating a suction wind; an operation portion connected to the body portion for operation by a user; and a suction portion connected to the operation portion, having a rotating brush and driving the rotating brush Brushing the motor and sucking in dust; the first communication unit is disposed in the main body and communicates with the operation unit; the main control unit controls the first communication unit; and the second communication unit Provided in the operation unit, and performing data communication with the first communication unit; the operation control unit is connected to the second communication unit, and transmits data to the second communication unit; the reference potential line is supplied The reference potential of the first communication unit and the second communication unit is used for supplying power to the brush motor, and the detecting unit detects the energization state of the brush motor. Further, the main body control unit is configured to perform data between the first communication unit and the second communication unit while the current of the brush motor is equal to or less than a predetermined value based on the detection result of the detection unit. communication.

According to the present invention, since the communication between the main body portion and the operation portion is performed when the current of the brush motor is small, the communication accuracy can be prevented by reducing the number of lines by causing the energization current of the brush motor to flow to the reference potential line. reduce.

10‧‧‧Electric vacuum cleaner

12‧‧‧ Body Department

22‧‧‧Operation Department

24‧‧‧Inhalation Department

34‧‧‧Switch Department

40‧‧‧Display Department

50‧‧‧Blowing motor

52‧‧‧reference potential line

54‧‧‧Power supply line

56‧‧‧ Body Control Department

58‧‧‧1st Ministry of Communications

60‧‧‧Power circuit

62‧‧‧Power cord

64‧‧‧Detection Department

70‧‧‧2nd Ministry of Communications

71‧‧‧Communication line

72‧‧‧Operation Control Department

74‧‧‧Voltage stabilization circuit

90‧‧‧Rotary brush

92‧‧‧ brush motor

T1‧‧‧Power supply period

During the T2‧‧‧ communication period

T3‧‧‧ zero period

T4‧‧‧Communication period

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

Fig. 2 is a front view of the operation unit.

Fig. 3 is a system configuration diagram of an electric vacuum cleaner.

Fig. 4 is a circuit diagram showing a configuration example of a detecting unit.

Figure 5 is a sequence diagram of the polling process.

Fig. 6 is a view showing the relationship between the communication period and the energization current.

Fig. 7 is a partial enlarged view of Fig. 6.

Fig. 8 is a circuit diagram showing a modification of the detecting unit.

Fig. 9 is a circuit diagram showing another modification of the detecting unit.

Fig. 10 is a view showing a communication period and the like in the second embodiment.

An electric vacuum cleaner according to an embodiment of the present invention will be described with reference to the drawings. The same or equivalent constituent elements are denoted by the same reference numerals, and the description thereof will be omitted.

First embodiment

Fig. 1 is an external view of a vacuum cleaner 10 according to a first embodiment of the present invention. The electric vacuum cleaner 10 is provided with the main body part 12. The main body portion 12 generates a suction wind by a blower motor, and the dust is collected by the suction wind to a portion of the dust box. The power plug 16 is connected to the body portion 12 via a power supply line 14.

The rear end of the hose 18 is connected to the body portion 12. The rear end of the tube 20 is connected to the front end of the hose 18. The operation unit 22 used for the operation of the user is provided at the rear end portion of the tube 20. The suction portion 24 is provided at the front end portion of the tube 20. The suction portion 24 is a portion that sucks in dust.

The second drawing is a front view of the operation unit 22. The operation unit 22 includes an open/close switch 30 that switches the opening and closing of the suction air, and changes the rotational speed of the blower motor. Power switch 32. The open/close switch 30 and the power switch 32 constitute a switch unit 34. The switch unit 34 is used for the user's operation.

The operation unit 22 includes a suction force display LED 36 and a dust sensor display LED 38. The suction force display LED 36 indicates the operating state of the blower motor. The dust sensor display LED 38 is used to motivate the user to empty the dust box when the dust box is full of garbage. The suction force display LED 36 and the dust sensor display LED 38 constitute the display portion 40. Further, the display unit 40 may be provided on the main body portion 12.

Fig. 3 is a system configuration diagram of the electric vacuum cleaner 10. First, the body portion 12 will be described. The body portion 12 has a blower motor 50 that generates suction air. The blower motor 50 is connected to the reference potential line 52 of the 100V-line and the power supply line 54 of the line 100V+, and receives power supply. This blower motor 50 is controlled by the body control unit 56. The body control unit 56 is formed, for example, by a microcomputer.

The first communication unit 58 that performs data communication with the operation unit 22 is provided in the main body unit 12. The first communication unit 58 is connected to the main body control unit 56 and controlled by the main body control unit 56. The power supply circuit 60 is provided for converting the commercial power source into a flowable low voltage power source when the power plug 16 is connected to the socket. The power supply circuit 60 generates a potential of the reference potential line 52 as a reference potential, for example, +5V. This +5 V is applied to the main body control unit 56 and the first communication unit 58 via the power supply line 62.

The detecting portion 64 connected to the reference potential line 52 and the power supply line 54 is provided in the body portion 12. The detecting unit 64 is formed by a zero crossing circuit. The output terminal of the detecting unit 64 is connected to the body control unit 56.

Next, the operation unit 22 will be described. Entering with the first communication unit 58 The second communication unit 70 for data communication is provided in the operation unit 22. The first communication unit 58 and the second communication unit 70 are connected by a communication line 71.

The switch unit 34 and the display unit 40 each composed of an electronic circuit are provided in the operation unit 22. The switch unit 34 and the display unit 40 are controlled by the operation control unit 72. The operation control unit 72 is formed, for example, by a microcomputer. The operation control unit 72 is connected to the second communication unit 70, and transmits the data to the second communication unit 70 in response to the request of the first communication unit 58.

In order to supply a stable voltage to the operation control unit 72, the switch unit 34, and the display unit 40, the voltage stabilization circuit 74 is provided in the operation unit 22.

Next, the suction unit 24 will be described. The suction portion 24 includes a rotating brush 90 and a brush motor 92 that drives the rotating brush 90. The rotational speeds of the brush motor 92 and the blower motor 50 are controlled by the body control unit 56. The brush motor 92 is connected to the reference potential line 52 and the power supply line 54, and receives the supply of AC power by these lines.

The reference potential line 52 is supplied to the reference potentials of the main body control unit 56, the first communication unit 58, the second communication unit 70, and the operation control unit 72, and supplies electric power to the brush motor 92. That is, the reference potential line 52 has a function of giving a reference potential and supplying power to the brush motor 92.

Moreover, the energization state of the brush motor 92 is detected by the detecting portion 64. Fig. 4 is a circuit diagram showing a configuration example of the detecting unit 64. The detecting unit 64 is formed by a zero crossing circuit that detects the zero time point of the alternating voltage supplied to the brush motor 92.

Next, the operation of the electric vacuum cleaner 10 will be described. Fig. 5 is a sequence diagram of the polling process performed by the electric vacuum cleaner 10. Having the first communication unit 58 The power supply period T1 for supplying electric power to the second communication unit 70 and the communication period T2 for communication between the first communication unit 58 and the second communication unit 70. In the power supply period T1, +5 V is input to the first communication unit 58. Further, the constant current circuit is provided in the first communication unit 58 or the like to cause a current to flow to the second communication unit 70. Further, the electric charge is stored in the capacitor provided in the second communication unit 70.

In the communication period T2, the first communication signal is transmitted from the main body control unit 56 to the serial data transfer 埠TxD. This first communication signal is required to specify the operation information of the switch unit 34. The first communication signal contains, for example, 8-bit data of the address data and the control data. The first communication signal arrives at the operation control unit 72 via the first communication unit 58, the communication line 71, the second communication unit 70, and the serial data reception port RxD.

The operation control unit 72 that has received the first communication signal transmits the second communication signal including the operation information of the switch unit 34 to the serial data transfer port TxD. The second communication signal reaches the main body control unit 56 via the second communication unit 70, the communication line 71, the first communication unit 58, and the serial data reception RxD. Then, the body control unit 56 performs control in response to the operation information. Further, in the communication period T2, the power supply system from the first communication unit 58 to the second communication unit 70 is not performed, and the capacitor of the second communication unit 70 is used as the power source, and the operation unit 22 operates.

In this manner, the main body control unit 56 causes the first communication unit 58 to periodically request the operation information of the switch unit 34 to the second communication unit 70. In response to the request, the operation control unit 72 causes the second communication unit 70 to transmit the operation information to the first communication unit 58. Further, the operation control unit 72 may automatically cause the second communication unit 70 to transmit operation information to the first communication unit 58 at regular intervals.

The content of the operation information received by the body control unit 56 includes When the closed switch 30 is turned "on", the main body control unit 56 drives the blower motor 50 and the brush motor 92. In this manner, the main body control unit 56 receives the operation information from the first communication unit 58, and controls the blower motor 50 and the brush motor 92 based on the operation information.

Since the reference potential line 52 and the power supply line 54 are used for the power supply to the brush motor 92, the potential of the reference potential line 52 fluctuates during the flow of the energization current (alternating current) of the brush motor 92. In other words, the larger the value of the energization current of the brush motor 92 (hereinafter, simply referred to as the energization current), the larger the potential fluctuation of the reference potential line 52, the smaller the value of the energization current, and the potential fluctuation of the reference potential line 52. The smaller.

Fig. 6 is a view showing the relationship between the communication period T2 and the energization current. In Fig. 6, the waveform of the communication signal of the signal waveform of the communication line, the waveform of the voltage of 100 V, and the waveform of the current of the brush motor are shown. During the communication period T2 is started and ends in the period T3 during which the energization current becomes zero. The communication period T2 that is periodically set starts and ends in the zero period T3.

In order to set the communication period T2 to the zero period T3, the main body control unit 56 uses the zero time point of the AC voltage output from the detection unit 64 (the timing at which the energization current becomes 0). In other words, the main body control unit 56 transmits the first communication signal at the timing when the energization current becomes 0 and receives the output of the detecting unit 64, and receives the second communication signal in the zero period T3. The communication period T2 is, for example, 1 [msec]. The zero period T3 is, for example, 1.5 to 2 [msec]. Further, in Fig. 7, a partial enlarged view of Fig. 6 is shown.

In this way, by setting the communication period T2 to the zero period T3 in which the energizing current of the brush motor becomes 0, the reference potential line can be not energized. The first communication signal and the second communication signal are transmitted during the period of the influence of the current. Therefore, the communication accuracy can be improved.

In the electric vacuum cleaner according to the first embodiment of the present invention, by reducing the number of lines by causing the energizing current of the brush motor to flow to the reference potential line, the communication period T2 is set to be in the zero period T3 to prevent the communication accuracy from being lowered. The electric vacuum cleaner 10 can perform various modifications without departing from the scope of this feature.

For example, the detecting unit 64 may be configured to have a configuration other than the zero-crossing circuit as long as the energization state of the brush motor 92 can be detected. Fig. 8 is a circuit diagram showing a modification of the detecting unit. The detecting portion shown in Fig. 8 is formed by a circuit having a current transformer. The main body control unit accepts the output of the circuit and ends the communication period T2 in the zero period T3.

Fig. 9 is a circuit diagram showing another modification of the detecting unit. This circuit is formed in the same manner as the detecting portion of Fig. 8 with a circuit having a comparator. The detection unit of Fig. 8 is a half-wave rectification type, and the detection unit of Fig. 9 is a full-wave rectification type.

Further, a shunt resistor may be provided in the detecting portion. That is, the zero period T3 is detected by a shunt resistor provided on the reference potential line.

Further, the content of the data communication in the communication period T2 is not limited to the first communication signal and the second communication signal, and any content required for the operation of the vacuum cleaner can be employed. Further, these modifications can also be applied to the electric vacuum cleaner of the following embodiment.

Second embodiment

Since the electric vacuum cleaner according to the second embodiment of the present invention has many points in common with the first embodiment, the differences from the first embodiment will be mainly described. In the first embodiment, the communication period is ended in the zero period, and In the second embodiment, the mitigation of this requirement may be performed by setting the communication period T2 to a period other than the zero period.

Fig. 10 is a view showing a communication period and the like in the second embodiment. In Fig. 10, the communicable period T4 is shown. The communication period T4 is a period during which the communication period T2 is set. During this communication period, the energization current of the T4 brush motor becomes a predetermined value or less. The predetermined value is a value that does not lower the communication accuracy by changing the reference potential caused by the energization current of a predetermined value or less. When the operating voltage ranges of the main body control unit 56, the first communication unit 58, the second communication unit 70, and the operation control unit 72 are defined, it is preferable to determine the predetermined value so as not to exceed the operating voltage range.

The main body control unit performs data communication between the first communication unit and the second communication unit while the energizing current of the brush motor is equal to or less than a predetermined value (communicable period T4) based on the detection result of the detecting unit. According to this aspect, it is possible to expand the time during which the communication period T2 can be set while maintaining the communication accuracy between the main body unit and the operation unit.

10‧‧‧Electric vacuum cleaner

12‧‧‧ Body Department

14‧‧‧Power cord

16‧‧‧Power plug

18‧‧‧Hose

20‧‧‧ tube

22‧‧‧Operation Department

24‧‧‧Inhalation Department

Claims (6)

An electric vacuum cleaner comprising: a body portion for generating a suction wind; an operation portion coupled to the body portion for operation by a user; and a suction portion coupled to the operation portion, having a rotating brush and driving the Rotating the brush motor and sucking the dust; the first communication unit is disposed in the main body and communicates with the operation unit; the main body control unit controls the first communication unit; and the second communication unit Provided in the operation unit, and performing data communication with the first communication unit; the operation control unit is connected to the second communication unit, and transmits the data to the second communication unit; the reference potential line; Providing a reference potential of the first communication unit and the second communication unit, and for supplying power to the brush motor; and detecting a portion for detecting an energization state of the brush motor; the body control unit is configured according to the The detection result of the detecting unit performs data communication between the first communication unit and the second communication unit while the current of the brush motor is equal to or less than a predetermined value. The electric vacuum cleaner of claim 1, wherein the data communication between the first communication unit and the second communication unit ends when a current does not flow to the brush motor. An electric vacuum cleaner according to claim 1 or 2, wherein the detecting portion detects zero at a zero time point of an alternating voltage supplied to the brush motor. A cross circuit is formed. An electric vacuum cleaner according to claim 1 or 2, wherein the detecting portion is formed by a circuit having a flow comparator. An electric vacuum cleaner according to claim 1 or 2, wherein the detecting portion has a shunt resistor provided on the reference potential line. An electric vacuum cleaner according to claim 1 or 2, wherein the body portion has a blower motor that generates a suction wind; the operation portion has a switch portion for operation of a user; and the operation control portion controls the switch The data communication between the first communication unit and the second communication unit includes a first communication signal requesting operation information of the switch unit and a second communication signal for transmitting the operation information according to the request; The first communication signal is output from the main body control unit, and then passes through the first communication unit and the second communication unit, and then reaches the operation control unit; the second communication signal is output from the operation control unit, and then passes through the first communication signal. After the communication unit and the first communication unit reach the main body control unit, the main body control unit controls the blower motor and the brush motor based on the operation information.