JP2718489B2 - Electric vacuum cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner for controlling an electric blower in a state set by operating means.

[0002]

2. Description of the Related Art In a conventional vacuum cleaner of this type, an electric blower and a control means for controlling the electric blower are provided on a main body of the vacuum cleaner, and a control means such as a hose connected to the main body of the vacuum cleaner is provided. Operating means is provided from the means via a two-wire transmission line.

[0003] Then, by controlling the current value if example embodiment the operation means detects a current value of the operating means by the control means, in advance on the electric blower based on a threshold set in the control unit, off other control You are.

[0004]

However, if extraneous noise enters the control means, the control means detects the extraneous noise of this large current and malfunctions.

[0005] For example if two-wire transmission line of a hose at both ends of the operating means is a current flow of a large value to the control means for short-circuiting, has similarly, the problem of erroneous operation.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and has as its object to provide a vacuum cleaner that is less likely to malfunction even when external noise enters or short circuit occurs.

[0007]

The vacuum cleaner of the present invention comprises:
An electric blower, operating means for setting a state of the electric blower and supplying currents having different current values according to the set state, and setting a threshold value for each state set by the operating means, and setting the electric blower according to the threshold value and control means for controlling said control means, the current value exceeds the current value in the case of short-circuited the operating means is set as the endmost threshold, if it is determined that more than the endmost threshold, the electric Immediately before the state of the blower is determined to be equal to or greater than the extreme end threshold value,
The control is performed according to the current value set by the operating means .

[0008]

In the vacuum cleaner of the present invention, the control means sets a threshold value for each state set by the operation means, controls the electric blower according to the threshold value, and sets a current value equal to or more than the current value when the operation means is short-circuited. was set as the endmost threshold, and if this is determined extreme threshold or <br/> and the state of the electric blower higher endmost threshold
The current value set by the operating means immediately before the judgment is made
Therefore to control, or caused external noise if example embodiment, even if current flows to the control means operating means is shorted, in these cases external noise or short, in the case of short-circuit operating means current more current Since the value flows, the setting of the electric blower is set by the operating
Control is performed according to the set current value to prevent malfunction.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 2, reference numeral 1 denotes an electric vacuum cleaner main body. The electric vacuum cleaner main body 1 has a built-in electric blower F, and a base end of a hose 2 communicating with the electric blower F is detachably connected. The distal end of the hose 2 is provided with a hand operation unit 3 having a shape branched toward the rear. A suction port body 5 is attached to a tip of the hand operation unit 3 via a telescopic extension tube 4.

As shown in FIG. 3, the hand operation unit 3 branches backward and has a free end at the grip.
11 and the upper surface of the hand operation unit 3 is extended
Button 12 for stop setting, button 13 for automatic setting, button 14 for weak / strong setting, and power brush B
Buttons 16 are sequentially arranged in a line.

Next, the internal configuration will be described with reference to FIG. First, an electric blower F provided in the vacuum cleaner main body 1 and a power brush B provided in the suction opening body 5 are supplied with a commercial AC power supply E via power control triacs 21 and 22, respectively. It is connected to the. The gates of these triacs 21 and 22 have a vacuum cleaner body 1
The control means 25 built in the inside is connected, and further, the control means 25 is connected to the operation means 26 of the manual operation unit.

Further, a part of the control means 25 and operation means
The specific circuit of 26 is as shown in FIG.

The control means 25 includes a microcomputer 3 having an IV conversion means 30 for converting a current value to a voltage value.
1. A power supply means 32 for supplying power to the operation means 26 and a current detection means 34 for detecting a current from the operation means 26 are provided. Further, the power supply means 32 outputs a constant voltage from the constant voltage three-terminal regulator 36 and the capacitor 37. The current detecting means 34 includes resistors 46, 47, 48 and capacitors 49, 50, and detects a current value of the operating means 26.

Further, the control means 25 comprises two-wire transmission lines 51, 52
Is connected to the operation means 26 via the. This operation means
26, a current limiting resistor 56 for detecting connection of the hose 2 is connected in series between the two-wire transmission lines 51 and 52. Further, in parallel with the resistor 56, a series circuit of a normally open switch 57 and a resistor 58 operated by the stop setting button 12, a normally open switch 59 and a resistor 60 series circuits, weak / strong setting buttons
A series circuit of a normally open switch 61 and a resistor 62 operated by 14 and a series circuit of a normally open switch 63 and a resistor 64 operated by a power brush button 16 are connected. Note that the resistance values of the resistors 58, 60, 62, and 64 are set to different resistance values.

The microcomputer 31 is configured as shown in FIG.
It has the threshold shown in FIG.

The threshold value is a threshold value i ₁ when the hose 2 is simply connected, and a threshold value when the stop setting button 12 is operated and the normally open switch 57 is closed and a current flows through the resistor 58. If the threshold value i ₂ is slightly larger than i ₁ , the button 13 for automatic setting is operated, the normally open switch 59 is closed, and a current flows through the resistor 60, the threshold value i ₃ slightly larger than the threshold value i ₂ , for weak / strong setting slightly larger threshold i _4, normally open switch 63 button 16 is operated for the power brush closed than the threshold value i ₃ when the switch 61 of the button 14 is operated normally open is closed current flows through the resistor 62 If it current flows through the resistor 64 is set to the threshold i ₅ slightly greater than the threshold value i _4. Furthermore, a current value larger than the current value when the operating means 26 is short-circuited is
It is adapted to maintain the previous state as extreme threshold i _6.

Next, a specific operation will be described with reference to a flowchart shown in FIG. 5 and a time chart shown in FIG.

Firstly, it reads the current at a current sensing means 34 (Step 1), and detecting the presence or absence of threshold i ₁ or more current detecting the presence or absence of the connection of the hose 2 (Step 2). If current threshold i ₁ below, since between two-wire transmission lines 51, 52 is released, it is determined that the hose 2 is off, to stop the electric blower F after one second (Step 3), step Return to 1. When the threshold value i ₁ or more current at a current sensing means 34 is detected, it is determined that the hose 2 is connected, proceeding.

[0020] Then, first, detects whether there is an input pulse stop setting button 12 (Step 4), i.e. whether it is less than the threshold value i ₃ exceeds the threshold value i ₂ shown in FIG. 6 (c) It determines, determines that in the case of less than the threshold value i ₃ exceeds the threshold value i ₂ is operated button 12 for stop setting, 6
The electric blower F and the power brush B shown in (a) and (b) are stopped (Step 5), and the process returns to Step 1.

[0021] If it is determined not the threshold value i ₃ or less in Step 2, to detect whether there is an input pulse of the automatic setting button 13 (step 6), ie beyond the threshold i ₄ below the threshold i ₃ it is determined whether or not there, it is determined that the button 13 for the automatic setting in the case of the threshold i ₄ below exceed the threshold i ₃ is operated, the electric blower F is automatic operation (step 7), the flow returns to step 1.

[0022] If it is determined not the threshold value i ₄ or less in Step 5, to detect whether there is an input pulse weak / strong setting button 14 (step 8), i.e. the threshold i ₅ exceeds the threshold value i ₄ determining whether less or is, if more than the threshold i ₅ exceeds the threshold value i ₄ determines that the button 14 for weak / strong setting has been operated, the electric blower F weak or strong is operated (step 9) Return to step 1.

[0023] If it is determined not the threshold value i ₅ or less in step 7, it is detected whether there is an input pulse power brush setting button 16 (step 10), i.e. the threshold value i
₅ it is determined whether the threshold value i ₆ below exceeds a threshold value i ₅
The case of the threshold i ₆ below exceeds determines that the button 16 for power brush set is operated, thereby driving the power brush B (step 11), the flow returns to step 1. In addition. When the power brush setting button 16 is operated and the electric blower F is not driven, the electric blower F is also driven in an automatic state.

[0024] If it is determined not the threshold value i ₆ In the following step 7, as an extreme the threshold, the process returns to step 1, in a standby state by circulating loop to maintain the previous operation.

As described above, in the case of the extreme end threshold value, the previous operation is maintained, and as shown by the pulse N in FIG. In general, since the threshold value is reached at the extreme end, external noise, even when the operation means 26 is short-circuited, no malfunction occurs, and the conventional operation , that is, the various buttons 12 and
Operates according to the current value set by the operation of 13, 14, 16
The driving state of the blower is controlled and maintained.

[0026]

According to the vacuum cleaner of the present invention, the control means sets a threshold value for each state set by the operation means, controls the electric blower in accordance with the threshold value, and is equal to or more than the current value when the operation means is short-circuited. set the current value as the endmost threshold, if it is determined that more than the endmost threshold, extreme conditions of the electric blower
Immediately before it is determined to be greater than or equal to the threshold,
And for controlling in accordance with a current value, or external noise is generated if example embodiment, even if current flows to the control means operating means is shorted, in these cases external noise or short-circuit, the current value in the case of short-circuit operating means Since the above current value flows,
Immediately before the state of the electric blower is judged
Control is performed in accordance with the current value set by the operating means , and malfunction can be prevented.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a vacuum cleaner according to the present invention.

FIG. 2 is a perspective view showing an appearance configuration of the same.

FIG. 3 is a perspective view showing the same permission operation unit.

FIG. 4 is a circuit diagram showing a circuit configuration of the electric vacuum cleaner.

FIG. 5 is a flowchart showing the operation of the electric vacuum cleaner.

FIG. 6 is a timing chart showing an operation of the electric vacuum cleaner.

[Explanation of symbols]

 25 Control means 26 Operating means F Electric blower

Claims (1)

(57) [Claims] An electric blower, operating means for setting a state of the electric blower and supplying currents having different current values according to the set state, and setting a threshold value for each state set by the operating means. and control means for controlling said electric blower in accordance with the threshold value, said control means sets the current value exceeds the current value in the case of short-circuited the operating means as the endmost threshold, the endmost threshold than
If it is determined as above, the extreme conditions of the electric blower
Immediately before it is determined to be greater than or equal to the threshold,
An electric vacuum cleaner characterized by controlling according to a current value .