JP4075198B2 - Electric vacuum cleaner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vacuum cleaner that transmits a control signal from a hand operating portion side of a hose to a vacuum cleaner body side.
[0002]
[Prior art]
A conventional example will be described with reference to FIGS.
[0003]
As shown in FIG. 12, the overall configuration of the vacuum cleaner includes a nozzle 105 that sucks dust, an extension pipe 104 that guides the dust sucked by the nozzle 105 to the hose 102 side, and an electric blower 1 that generates a suction force. A hand operating section comprising a main body 101 for collecting dust from the hose 102 in the chamber 101a, and operating means 102b for setting operation / stop of the electric blower 1 and the like attached to the end of the hose 102 on the side of the extension pipe 104 It is provided on the upper surface of 102a.
[0004]
In this configuration, as shown in FIG. 13, an operating means 102b, a second control means 205, and a second AC / DC converter 206 are provided in a hand operating section 102a that is gripped when the user performs cleaning. The second AC / DC converter 206 supplies power to the second control means 205 and the operation means 102b. The operation means 102b is composed of a plurality of switches, and the user can set the operation selection of the electric blower 1. The main body 101 includes an AC / DC converter 208, a control unit 209, and the electric blower 1. The AC / DC converter 208 supplies power to the control unit 209, and the control unit 209 operates the electric blower 1 from the drive of the electric blower 1 and the second control unit 205 in the hose 102. A stop signal or the like is input and driven. In addition, the nozzle 105 has a built-in motor 202 for driving the rotating brush, and operation / stop selection can be performed by the operation means 102b in the hand operation unit 102a. Reference numeral 207 denotes a bidirectional thyristor that controls energization to the motor 202, and reference numeral 210 denotes a bidirectional thyristor that controls energization to the electric blower 1.
[0005]
In this configuration, four conductors are required for supplying signals and power between the hand operating unit 102a and the main body 101. That is, the second control means 205 and the control means 209 require two signal lines, and two power supply lines are used for supplying power to the motor 202 and supplying power to the second AC / DC converter 206. Was necessary. These four conductors 102a must be embedded in the hose 102. Therefore, the weight of the hose 102 becomes heavy, and the hose 102 cannot be bent smoothly, which causes a deterioration in cleaning workability. Further, the second operation means 205 and the AC / DC converter 206 are accommodated in the hand operation section 102a, and the hand operation section 102a is heavy.
[0006]
[Problems to be solved by the invention]
In the configuration of the conventional vacuum cleaner, there is a second control means 205 (generally configured by a microcomputer) for performing electrical control on the hand operating unit 102a, and miniaturization is restricted. In addition, two control signal lines are required for the main body 101, and the signal lines in the hose 102 cannot be reduced, making it difficult to reduce the weight.
[0007]
This invention solves the said subject, Comprising: It aims at providing the vacuum cleaner which can implement | achieve size reduction of a hose and a hand operation part, and aimed at the improvement of usability.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a nozzle having a brush driven by a motor, an electric blower that generates a suction force, an electric vacuum cleaner body incorporating the electric blower, and one end side of the electric vacuum cleaner main body. A hose having a hand operating part on the other end side, a switch provided in the hand operating part, supplying electric power on the main body side of the vacuum cleaner to the nozzle via the hand operating part, and the switch In order to send the signal voltage accompanying the operation to the main body of the vacuum cleaner, a lead wire provided on the hose, a circuit provided on the main body side of the vacuum cleaner and outputting a predetermined voltage, and the main body side of the vacuum cleaner Provided with a control means for inputting the signal voltage, and the conducting wire is connected to two power supply lines for supplying power to the motor and one of the power supply lines via the switch. The voltage output from the circuit is applied between one of the power supply lines and a resistor connected to the line, and the control means detects the signal voltage of the line. It is configured to determine whether or not the switch is operated, and to correct a voltage generated in the power supply line by a resistance of the conductor, so that the determination of the signal voltage is changed when the motor is driven and stopped. This makes it possible to reduce the size and weight of the hand control unit with a simple configuration and to reduce the number of signal lines in the hose.
[0009]
[Form of the present invention]
The invention according to claim 1 of the present invention includes a nozzle having a brush driven by a motor, an electric blower for generating a suction force, an electric vacuum cleaner body incorporating the electric blower, and one end side of the electric vacuum cleaner main body. A hose having a hand operating part on the other end side, a switch provided in the hand operating part, supplying electric power on the main body side of the vacuum cleaner to the nozzle via the hand operating part, and the switch In order to send the signal voltage accompanying the operation to the main body of the vacuum cleaner , a lead wire provided on the hose, a circuit provided on the main body side of the vacuum cleaner and outputting a predetermined voltage, and the main body side of the vacuum cleaner provided, comprising a control means for inputting the signal voltage, the conductors, two and a power supply line for supplying power to said motor, connected via the switch to one of the power line Is composed of three-in, a voltage output from the circuit is applied between a resistor connected to the line and one of said power supply lines, the control means, wherein by detecting the signal voltage of the line together to determine the presence or absence of the operation of the switch, the resistor having a conductive wire configured to correct the voltage generated in the power line, so as to change the determination of the signal voltage at the time of driving and stopping of said motor It was a vacuum cleaner.
[0010]
【Example】
Example 1
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
[0011]
First, an outline of the entire vacuum cleaner will be described. Reference numeral 101 denotes an electric vacuum cleaner main body (hereinafter referred to as a main body), in which a dust collecting chamber 101a is disposed in the front of the main body 101, and the electric blower 1 is disposed in the rear. Reference numeral 102 denotes a hose, one end of which is connected to a dust collecting chamber 101a in the main body 101, the other end is provided with a hand operating portion 102a, and a conductor 103 for supplying power on the main body 1 side to the nozzle 105 is provided. . Reference numeral 104 denotes an extension pipe, one end of which is connected to the hand operation unit 102 a and the other end is connected to the nozzle 105. As a result, the dust sucked from the nozzle 105 is guided to the dust collecting chamber 101 a in the main body 101 via the extension pipe 104 and the hose 102. This suction force is generated by the electric blower 1.
[0012]
As shown in FIG. 4, the hand operating unit 102a includes a “carpet” operating unit 102c that is operated when cleaning the carpet, a “floor / folding” operating unit 102d that is operated when cleaning the floor and tatami, and the main body of the vacuum cleaner. An “OFF” operation unit 102e is provided to be operated when the operation of 101 is stopped. These operation units are operated by the operation setting unit 102b on the upper surface of the hand operation unit 102a. When the carpet operation unit 102c is pressed once, an “automatic” mode in which the air volume of the electric blower 1 is automatically set according to the amount of dust is set, and the “automatic” display unit 102f is turned on. When the button is pressed once, the “high power” mode in which the air flow of the electric blower 1 is set to “strong” is set, the “high power” display portion 102g is turned on, and when the button is pressed once again, the air flow of the electric blower 1 is set to “low”. "Quiet" mode is set, "quiet" display portion 102h is lit, and when pressed once more, the mode returns to the first "automatic" mode, and the setting as described above is repeated.
[0013]
The “floor / tatami” operation unit 102d also has the same air volume setting of the electric blower 1 as the “carpet” operation unit 102c. However, when the “carpet” operation unit 102c is operated, the rotating brush in the nozzle 105 is used. The motor 10 is also energized, and not only the electric blower 1 but also the rotating brush (not shown) operates. The rotating brush rotates in any mode of “automatic”, “high power”, and “quiet”.
[0014]
However, in recent years, even when the “floor / folding” operation unit 102d is pressed, the motor 10 that drives the rotating brush in the nozzle 105 is also driven.
[0015]
Next, the circuit configuration will be described with reference to FIG.
[0016]
Reference numeral 3 denotes an AC / DC converter, which outputs a predetermined low voltage (for example, DC 24V) when a commercial power source (for example, AC 100V) is input. As shown in FIG. 2, a circuit configuration example is entirely generated by a rectifier diode 3a. Wave rectification is performed and smoothed by the electrolytic capacitor 3b (DC), the voltage of 100V is lowered by the converter 3c which is a one-chip IC, and the output is smoothed again by the electrolytic capacitor 3d to obtain 24V DC. There is a type of IC that does not require the electrolytic capacitor 3b on the input side of the converter 3c, and a transformer may be used instead of the converter 3c.
[0017]
The AC / DC converter 3 is connected to a commercial power source. Reference numeral 2 denotes an operation means, which is composed of a plurality of resistors and switches as shown in FIG. 1, and corresponds to each of the operation sections 102c, 102d, and 102e described above, and is located on the hand operation section 102a of the hose 102. . Reference numeral 8 denotes a control unit that determines the output of the operation unit 2 and issues a drive command for the electric blower 1 and the motor 10.
[0018]
Next, the operation will be described.
[0019]
The configuration of the operation means 2 will be described in more detail. A predetermined voltage (one end of AC100V, which is the line A in FIG. 1) connected to the motor 10 built in the nozzle 105 is set to a predetermined voltage ( For example, a plurality of resistors are connected between lines having 24 VDC and indicated by point C in FIG. 1, one end of a switch is connected between the resistors, and the other end of the power line (AC 100 V) is connected to the motor 10. (It is a line of B in FIG. 1). That is, the power lines A and B are connected to both ends of the motor 10, the line where the potential difference of AC 100V is generated with respect to the A line is the B line, and the line where DC 24V is generated is the C line.
[0020]
Now, assuming that the resistors A and B, the switches (SW) A and B, and the resistor Z are configured, the signal sent from the operation means 2 to the control means 8 is the resistors A and B when the SW is not pressed. , Resistance C, resistance Z divided voltage ((resistance A + resistance B + resistance C) / (resistance A + resistance B + resistance C + resistance Z)) × voltage value (DC24V). Here, if the resistors A, B, C, and Z are 10K ohms, the signal from the operating means 2 is 18V.
[0021]
When the switch B is pressed, the output of the operation means 2 becomes DC 12V because it is divided by the resistance C (10K ohm) and the resistance Z (10K ohm).
[0022]
However, the power supply line to the motor 10 passes through the hose 102, and there is a resistance of several ohms to the operation means 2 configured using this power supply line. In the configuration of FIG. 1, if the control means 8 does not perform the operation of the motor 10, it can be determined which switch is pressed by the calculation as described above, but when the motor 10 is ON. The voltage of the product of the current flowing through the motor 10 and the resistance value between the hoses 102 is generated by the resistance value between the hoses 102. (If the resistance of the hose 102 is about 4.4 ohms and the current of the motor 10 is 0.4 A, DC 1.76V). A value obtained by adding the voltages is sent from the operation means 2 to the control means 8. Therefore, when the motor 10 is operated, the control means 8 corrects the output from the operation means 2 to determine which switch is pressed, as shown in FIG.
[0023]
In other words, in the example shown above, when the motor 10 is not ON, when the switch B is pressed, there is an output of DC12V, but even if the same switch B is pressed, When the motor 10 is ON, DC 13.76 V is output from the operation means 2. Therefore, in this case, DC 1.76V is corrected to 12V, and the control means 8 determines that the switch B has been pressed.
[0024]
By performing this operation, the operation means 2 realized by a simple configuration of a plurality of resistors and switches can detect the ON state of the switch by one conductive wire 103 regardless of whether the motor 10 is ON or OFF. The user can reduce the weight of the hand operating unit 102a and the hose 102 each time the user cleans, improve the usability, and can be used easily.
[0025]
The control means 8 detects the state in which each switch is pressed and controls the energization of the electric blower 1 in the mode as described above. The bidirectional thyristor 207 performs phase control. The motor 10 of the nozzle 105 is ON / OFF controlled by a bidirectional thyristor 207 to control the operation / stop of the rotating brush in the nozzle 105.
[0026]
(Example 2)
A second embodiment of the present invention will be described with reference to FIGS. The same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
[0027]
11 is a zero volt detection means for detecting the timing of zero volt of the commercial power supply, and the control means 8 is input with the signal of the operation means 2 as described above, the motor 10 built in the nozzle 105 by the signal of the operation means 2, and the electric blower Controls start and stop of operations such as 1 Reference numeral 13 denotes a timer for measuring a predetermined time by a signal from the zero volt detection means 11, and the control means 8 also inputs the timer 13.
[0028]
Next, the operation will be described.
[0029]
The waveform of the current flowing through the motor 10 will be described with reference to FIG.
6A is a waveform of a voltage applied to the motor 10, FIG. 6B is a waveform of a current flowing through the motor 10 in response to the voltage of FIG. 6A, and FIG. 6C is a zero volt detection signal of the zero volt detecting means 11. is there.
[0030]
When the motor 10 is turned on by the control means 8, a voltage is applied to both ends of the motor 10 ((A) in FIG. 6). As a result, the motor 10 starts operating. Here, the zero volt detection means 11 detects points (a, b, c, d) at which the voltage waveform becomes zero volt. If the current flowing through the motor 10 is near zero near this voltage, if the signal from the operation means 2 is received at this timing, the operation means based on the voltage generated by the resistance through the hose 102. 2, the current flowing through the motor 10 is as shown in FIG. 6B and deviates from zero volts. This is because the motor 10 has not only a pure resistance component but also a reactance component, so that the voltage waveform and the current waveform always shift in time. When the operation means 2 is input, it is ideal that the current flowing in the motor 10 is zero. Therefore, the timer 13 that receives the detection signal of the zero volt detection means 11 receives a predetermined time ( The time (ta time in FIG. 6D) is measured. When the timer 13 finishes timing, the timer 13 outputs a timing end signal to the control means 8. At the same time, the timer 13 resets the time and waits for the next signal from the zero volt detecting means 11. The control means 8 that has received the timing end signal obtains the output of the operation means 2 and determines which switch has been pressed.
[0031]
By this operation, the operation means 2 can be input at a time when no current is flowing in the motor 10, the switch ON / OFF determination can be performed more reliably, and the hand operation unit 102 a and the hose 102 can be reduced in weight. , It improves usability and can be used without a sense of incongruity.
[0032]
(Example 3)
A third embodiment of the present description will be described with reference to FIGS. The same components as those in the first and second embodiments are denoted by the same reference numerals, and the description thereof is omitted.
[0033]
11 is a zero volt detecting means for detecting the timing of zero volt of the commercial power supply, 19 is a second timer for measuring a predetermined time by a signal of the zero volt detecting means 11, and the control means 8 is an output and operation of the second timer 19 The output of the means 2 is also input.
[0034]
Next, the operation will be described.
[0035]
The waveform of the voltage applied to the motor 10 will be described with reference to FIG.
8A shows the waveform of the voltage applied to the motor 10, FIG. 8B shows the waveform of the current flowing through the motor 10 that receives the voltage of FIG. 8A, and FIG. 8C shows the detection signal of the zero volt detection means 11. .
[0036]
Regarding the ON timing of the motor 10 by the control means 8, the zero volt detecting means 11 detects the points (a, b, c, d) at which the voltage waveform becomes zero volt. The second timer 19 that has received the detection signal from the zero volt detecting means 11 measures a predetermined time (tb time in FIG. 8A, for example, 3 mS). The second timer 19 outputs to the control means 8 that the current time is being measured. Upon receipt of this, the control means 8 first applies the voltage of the motor 10 during the time measurement of the second timer 19. Without input, the operation means 2 is input. If a signal from the operating means 2 is received in the vicinity of zero volts in the voltage waveform (FIG. 8A) and the current flowing through the motor 10 is near zero, the voltage generated by the resistance during the passage through the hose 102 As shown in FIG. 8B, when the motor 10 is not turned on, no current flows through the motor 10 correspondingly. The operation means 2 is input during a period to determine which switch has been pressed. Thereafter, when the second timer 19 finishes counting the predetermined time, it outputs an end of counting, and the control means 8 that has received this outputs turns on the motor 10. The second timer 19 that has output a signal indicating the end of timing resets the timing and waits for the output of the zero volt detection means 11 again.
[0037]
Here, the timer 13 described in the second embodiment is added to FIGS. 7 and 8, and the timer 13 can delay the read timing of the control means 8 by ta time, and the current of the motor 10 can be surely reduced to zero. Detection can be performed with points.
[0038]
By this operation, it is possible to create a state in which no current flows in the motor 10, and at the time, the operation means 2 can be input, and more accurate and accurate ON / OFF determination of the switch can be performed. The weight and size can be improved.
[0039]
Example 4
Next, a fourth embodiment of the present description will be described with reference to FIGS. The same components as those in the first to third embodiments are denoted by the same reference numerals and description thereof is omitted.
[0040]
Reference numeral 14 denotes current detection means for detecting a current flowing through the motor 10, reference numeral 16 denotes storage means for storing a predetermined value, and the control means 8 also inputs the current detection means 14 and the storage means 16.
[0041]
Next, the operation will be described.
[0042]
When inputting the operation means 2, the output is prevented from being different even if the same switch is pressed in the operation means 2 due to the current flowing through the motor 10. Since the voltage generated in the path of the hose 102 differs depending on the current flowing through the motor 10, the current detection means 14 detects the current of the motor 10. That is, when the motor 10 is turned on by the control means 8, the current detection means 14 always detects the current flowing through the motor 10 and outputs it to the control means 8. Upon receiving this signal, the control means 8 inputs a correction value (FIG. 10) corresponding to the corresponding current value from the storage means 16 and corrects the input value from the operation means 2.
[0043]
For example, if the operation means 2 is composed of resistors A, B, C, switches (SW) A, B, and a resistor Z, the operation means 2 sends the control means 8 to the control means 8 when the SW is not pressed. The signal to be obtained is a divided voltage of (resistor A + resistor B + resistor C) / (resistor A + resistor B + resistor C + resistor Z)) × voltage value (DC 24 V). Here, if the resistors A, B, C, and Z are 10K ohms, the signal from the operating means 2 is 18V. Since an unnecessary voltage is generated due to the resistance between the hose 102 (about 4.4 ohms) and the current flowing through the motor 10, 0.44V DC is added when a current of 0.1A flows through the motor 10. DC 18.44 V is the output of the operating means 2.
[0044]
Receiving this, the control means 8 inputs a correction value corresponding to the current value of 0.1 A from the storage means 16 and corrects the output (DC 18.44 V) from the operation means 2. (DC18.44-DC0.44 = DC18V)
Here, the motor 10 is built in the nozzle 105, and the load state which becomes a burden varies depending on the state of the floor surface or the like, so that a constant current does not always flow. In this state, in order to input the output from the operation means 2 with high accuracy, the current flowing through the motor 10 is constantly detected by the current detection means 14 and sent to the control means 8 while correcting the output of the operation means 2. To determine which switch is pressed.
[0045]
As a result, regardless of the surrounding environment such as the floor surface or the difference in the specification environment, the operation means 2 can be accurately input, the switch ON / OFF can be accurately determined, and the user can handle each time cleaning is performed. The portion 102a and the hose 102 can be reduced in weight and can be used without a sense of incongruity.
[0046]
(Example 5)
Next, a fifth embodiment of the present description will be described with reference to FIG.
[0047]
The same components as those in the first to fourth embodiments are denoted by the same reference numerals, and the description thereof is omitted.
[0048]
Reference numeral 17 denotes display means for performing display, and the control means 8 also performs input to the current detection means 14, the storage means 16, and output to the display means 17.
[0049]
Next, the operation will be described.
[0050]
The current flowing through the motor 10 is detected by the current detector 14 and output to the controller 8 (for example, 1.2 A). Receiving this, the control means 8 performs an operation of inputting the corresponding correction value from the stored value of the storage means 16, but the current value of 1.2A is not in the stored value (see FIG. 10). In this case, it is determined that the motor 10 is in an abnormal state. In this state, since the input of the operation means 2 cannot be detected with high accuracy, the control means 8 outputs an error to the display means 17. Receiving this, the display means 17 displays and notifies abnormality.
[0051]
Here, the display means 17 may be arranged other than the function of displaying the selected state corresponding to each switch of the operation means 2 or other than the hand operating section 102a.
[0052]
As a result, it is possible to input the operation means 2 that can display an abnormality and does not cause a malfunction, can accurately determine ON / OFF of the switch, and the user operation unit 102a and the hose 102 that the user handles each time cleaning is performed. Can be reduced in weight. Abnormalities may be reported not only by display but also by sound to the user, or by both display and notification.
[0053]
In Embodiments 1 to 5, the configuration in which the control means 8 is provided in the electric vacuum cleaner main body 101 has been described. However, the connection pipe for attaching the control means 8 to the end of the hose 102 on the electric vacuum cleaner main body 101 side. Even in this case, it is only necessary to provide the operating means 2 in the hand operating section 102a, and the hose 102 can also have three conductors, and the hand operating section 102a and the hose 102 can be reduced in weight . It can be carried out.
[0054]
【The invention's effect】
According to the first aspect of the present invention, the weight of the hand operating portion and the hose can be reduced, the cleaning workability can be improved, and the signal from the operating means can be accurately obtained regardless of whether the motor is driven or stopped. It can be detected.
[Brief description of the drawings]
FIG. 1 is a circuit block diagram of a vacuum cleaner showing a first embodiment of the present invention. FIG. 2 is a block diagram of an AC / DC converter of the vacuum cleaner. FIG. 3 is an output of an operating means of the vacuum cleaner. FIG. 4 is a top view of the hand operating portion of the hose of the vacuum cleaner. FIG. 5 is a circuit block diagram of the vacuum cleaner according to the second embodiment of the present invention. FIG. 7 is a circuit block diagram of an electric vacuum cleaner showing a third embodiment of the present invention. FIG. 8 is an operation waveform diagram of each part of the electric vacuum cleaner. Fig. 10 is a circuit block diagram of a vacuum cleaner showing an embodiment of Fig. 4. Fig. 10 is a table showing output correction of operation means of the vacuum cleaner. Fig. 11 is a circuit of a vacuum cleaner showing a fifth embodiment of the invention. Block diagram [Fig. 12] External perspective view of vacuum cleaner [Fig. 13] Circuit block diagram of conventional vacuum cleaner [ Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Electric blower 2 Operation means 3 Detection means 8 Control means 10 Motor 11 Zero volt detection means 13 Timer 14 Current detection means 16 Storage means 17 Display means 101 Vacuum cleaner main body 102 Hose 102a Hand operation part 105 Nozzle

Claims (1)

A nozzle having a brush driven by a motor, an electric blower that generates a suction force, an electric vacuum cleaner main body including the electric blower, one end side connected to the electric vacuum cleaner main body, and a hand operation unit on the other end side A hose having a switch, a switch provided in the hand operation unit, and supplying electric power on the main body side of the vacuum cleaner to the nozzle through the hand operation unit, and a signal voltage associated with the operation of the switch. In order to send to the main body side, a conductor provided on the hose, a circuit provided on the main body side of the vacuum cleaner and outputting a predetermined voltage, and a control provided on the main body side of the vacuum cleaner and inputting the signal voltage and means, said conductive wire, two and a power supply line for supplying power to the motor, is composed of three of the connected power line end to via the switch line, said rotating With a voltage output is applied between a resistor connected to the line and one of said power supply lines, the control means determines whether the operation of the switch by detecting the signal voltage of the line from, wherein the resistor having a conductor configured to correct the voltage generated in the power line, the electric vacuum cleaner so as to change the determination of the signal voltage at the time of driving and stopping of the motor.

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