JPH074335B2 - Vacuum cleaner - Google Patents

Description

Description: [Industrial application] The present invention relates to an electric vacuum cleaner used in a general household.

[Prior Art] FIG. 11 is a sectional view showing a conventional electric vacuum cleaner disclosed in, for example, Japanese Patent Laid-Open No. Sho 60-31725.
Has an electric blower (3) which is supplied with electric power from a commercial power source in the main body (2), and an exhaust port (4) is provided in the main body (2) on the exhaust side of the electric blower (3). ing.

A pressure sensor (5) provided in the air flow path to detect the air volume is provided on the exhaust side of the electric blower (3), and a filter (6) is provided on the upstream side of the electric blower (3). )
Is arranged, and the filter (6) and the main body (2) form a dust collecting chamber (8).

Further, an intake port (9) is opened in the front part of the dust collection chamber (8), and the proximal end part of the flexible hose (10) is connected to the intake port (9). ing.

A front wheel (11) and a rear wheel (12) are arranged at the bottom of the body (2) so that the body (2) can move.

FIG. 12 is an electric circuit diagram of the electric vacuum cleaner of FIG. 11, in which the AC power source (58) includes an electric blower (3) and a triac (75) for controlling the input power of the electric blower (3). Are connected in series, and the phase control circuit (37) is connected to the triac (75).

Further, the pressure sensor (5) is connected to the phase control circuit (37) via the amplifier (38), and the cutoff circuit (39) is connected to the phase control circuit (37).

The output side of the amplifier (38) is connected to an integrating circuit composed of a resistor (40) and a capacitor (41), and the output of the integrating circuit is connected to the inverting terminals of many comparators (42). ing.

Further, a reference voltage obtained by dividing the DC power supply Vcc by the resistors (43) to (46) is applied to the non-inverting terminal of the comparator (42).

The light emitting element (47) to the output side of the comparator (42)
A series circuit of (49) is connected, and a constant current circuit (50) is connected to the series circuit so that the brightness does not change depending on the number of lighting.

The output of the integration circuit is input to the cutoff circuit (39).

Next, the operation will be described.

When the dust collection chamber (8) becomes clogged with dust, the air volume decreases,
The output of the pressure sensor (5) also decreases, and the output of the amplifier (15) also decreases (see FIG. 13 (a)).

However, since the output V _A of the amplifier (38) is subject to a change in the air volume due to the momentary contact of the suction nozzle and the load on the floor surface,
As shown in FIG. 13 (a), a rapid change in response is shown.

Therefore, when passing through an integrating circuit composed of the resistor (40) and the capacitor (41), the change in V _A is alleviated, and the result becomes as shown in FIG. 13 (b).

That is, since the electric potential of V _B is not directly affected by the change in air volume,
In addition to being stable, the response is also moderated and changes slowly.

The V _B, the comparator to compare the V _B and the reference voltage (4
2) is applied to the input terminal, so that when V _B is higher than all the reference voltages, the outputs of all the comparators (42) are at the “L” level, and the light emitting elements (47) to (49). ) It's all gone.

However, when dust is clogged in the dust collecting chamber (8), the air volume gradually decreases, so that the voltage of V _B also starts to drop, and when the voltage of V _B becomes lower than the reference voltage, the comparator (42 ) Output is switched from "L" to "H", and the light emitting elements are lit one by one (see FIGS. 13B and 13C).

In FIG. 13 (c), in the region I, VB is the reference voltage VI.
~ Since it is higher than VIII, all of the light emitting devices (47) to (49) have disappeared.

In the region II, the conditions of VII, VIII <V _B <VI are satisfied, so only the light emitting element (47) is turned on.

Furthermore, when the air volume decreases, V _B becomes the region of III, and VIII
<V _B <VII <VI, and the two light emitting devices (47) and (48) come on.

Similarly, in the IV area, all light-emitting elements (47) to (49)
Lights up.

That is, the lighting level can be set by setting the reference voltages VI to VIII to potentials corresponding to the individual air volumes Q1 to Q3.

In addition, dust is clogged in the dust collection chamber (8), and the air volume decreases.
When V _B is maintained below a predetermined value for a predetermined time or longer, the cutoff circuit (39) is activated, and the cutoff circuit (39) outputs the pulse shown in FIG. 3 (d) to the phase control circuit (37). The gate pulse of the triac (75) is cut off, and the electric blower (3)
Will stop.

Further, since the output V _A of the amplifier (36) is added to the phase control circuit (37) as a control signal, quantitative control can be performed simultaneously in addition to the dust indicator.

[Problems to be Solved by the Invention] A conventional electric vacuum cleaner is controlled only by a comparison value of pressure values corresponding to a target (setting) output value of an electric blower, and therefore must be operated once in a target output operation. There is a problem that it cannot be compared with the comparison value. For example, even when the amount of garbage is full, the vehicle runs to some extent and then the power is turned off.

In addition, the pressure (vacuum degree) is complicated by the dust capacity, motor input, and floor condition (including the presence or absence of the suction nozzle landing) from Fig. 9 and Fig. 10, and can be easily determined. There wasn't.

The present invention has been made to solve the above problems, and an object thereof is to obtain an electric vacuum cleaner that can detect the amount of dust during slow operation to save energy and reduce noise.

[Means for Solving the Problems] An electric vacuum cleaner according to the present invention includes a cleaner main body having an electric blower, a hose portion connected to the cleaner main body, and a suction nozzle arranged at the tip of the hose portion. An electric vacuum cleaner comprising: a pressure sensor provided in the air flow path for detecting an air volume; and a control unit for inputting a signal from the pressure sensor, the control unit having a predetermined voltage after the power is turned on. It is characterized in that the electric blower is driven at the lowest level within the output control range for the time, and the dust volume in the dust collection chamber is detected based on the information from the pressure sensor during that time.

Further, the control means drives the electric blower at the lowest level within the output control range for a predetermined time after the power is turned on, and detects the dust volume in the dust collection chamber based on the information from the pressure sensor during that period, Input control of the electric blower may be performed based on this detection signal.

Furthermore, a nozzle sliding detection means for detecting the sliding of the suction nozzle is provided, and when the nozzle is not sliding due to a signal from the nozzle sliding detection means, the control means operates at the lowest level within the output control range. It is good to drive-control the blower. .

Furthermore, when the nozzle has not slid for a predetermined time or more in response to a signal from the nozzle sliding detection means, the control means may stop the electric blower.

[Operation] In the electric vacuum cleaner according to the present invention, output control is performed for a predetermined time after the power is turned on by the control unit that detects the air volume by the pressure sensor provided in the air flow path and inputs the signal from the pressure sensor. The electric blower is driven at the lowest level within the range, and the dust volume in the dust collection chamber is detected by the information from the pressure sensor during that period. At this time, the input control of the electric blower is performed. Further, the sliding of the nozzle is detected, and when the nozzle is not sliding, the electric blower is driven or stopped at the lowest level.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the vacuum cleaner (1) has a built-in electric blower (3) with variable input power in the main body (2), and the electric blower (3) is connected to a commercial power source (58). Power is supplied.

Further, a mounting chamber (8) for mounting a dust-collecting paper pack (7) is provided on the intake side of the electric blower (3), and an openable lid ( 9), and the base end of the flexible hose (33) is connected to the upper lid (9).

Furthermore, a control unit (57) is arranged in the main body (2), and a pressure sensor (67) provided in the control unit (57) is for detecting pressure from the intake side of the electric blower (3). Nozzle (16) is connected.

A flexible hose (33) is connected to the main body (2), and a remote part (34) is provided at the tip of the hose (33). By connecting to the main body (2), the remote section (34) and the main body (2) are electrically connected.

A suction pipe (35) is connected to the remote part (34), and a suction nozzle (36) is connected to the tip of the suction pipe (35).

Further, two pairs of electric wires are built in the hose (33) and are used as an AC power source or a medium for data signals, which will be described later.

As shown in FIG. 2, the control section (57) includes a constant voltage power supply circuit (59) for converting the voltage of the electric power from the AC power supply (58) into a predetermined value. The zero cross detector (60) is connected to 59).

Further, the control section (57) has a CPU (61) as a control means for controlling the operation of the main body (2), and the CPU (61) has an input circuit (62) and an output circuit (63). Timers (64)
And a memory (65) storing various programs is connected.

The input circuit (62) includes switches (17), (18) and (19) of the remote section (34) and a zero cross detector (6).
0) and the A / D converter (66) are connected to the pressure sensor (67).

Further, the output circuit (63) has a transistor (7) via a large number of LEDs constituting the display section (20) and a resistor (71).
The base of 2) is connected, and the light emitting diode (74) of the phototriac coupler connected to the pull-up resistor (73) is connected to the collector of the transistor (72).

On the other hand, an electric blower (3) is connected to the AC power source (58), and the triac (7) is connected in series to the electric blower (3).
5) is connected, and a series circuit of a resistor (76) and a capacitor (77) is connected in parallel with the triac (75).

Furthermore, the gate of the triac (75) is connected to a phototriac trigger element (78) that receives a light signal from the light emitting diode (74), and the input power of the electric blower (3) is the triac (75). Is controlled by the conduction angle, that is, the pulse output from the output circuit (63) (see FIG. 3).

Then, as shown in FIG. 1, the CPU (61) uses an operation section determination means (21) for determining the operation mode based on a signal from the remote section (34) and a paper pack according to a static signal from the pressure sensor (67). A dust volume determining means (22) for determining the amount of dust collected in (7) and a nozzle sliding determining means (23) for determining sliding of the brush part (36) by a dynamic signal based on a signal from the pressure sensor (67). ), And the operation section determining means (21), the dust capacity determining means (22) and the nozzle sliding determination means (23) determine the motor input determining means (determines the input power of the motor of the electric blower (3) ( 24) is connected to.

Further, the motor input determination means (24) is connected to the triac (75) as a motor input control means for controlling the motor input.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG.

When the power plug of the electric vacuum cleaner (1) is connected to the outlet of the commercial power supply (58), the CPU (61) sets the input of the electric blower (3) (step S1) (see FIG. 7).

Then, the operation section determination means (21) of the CPU (61) is configured to activate the start switch (17), (18) or (19) of the remote section (34).
When it is determined that the start switches (17), (18) and (19) are in the OFF state (step S2), the motor of the electric blower (3) is stopped (step S2).
3), slow operation is set to start from slow operation when restarting (step S4), then step S1
Return to.

When it is determined that the start switch (17), (18) or (19) is in the ON state, the CPU (61) causes the pressure sensor (6
7) is abnormal or not (step S5), the pressure sensor (6
When it is determined that 7) is abnormal, the sensor abnormality is displayed on the display unit (20) (step S6), the sensor abnormality is set (step S7), and the operations after step S3 are performed.

If the pressure sensor (67) is not abnormal, the CPU (61) determines whether or not the slow operation is set (step S8). If the slow operation is set, the CPU (61) determines that the slow operation is set. The operation is performed (step S9).

Then, during the slow operation, the dust volume determination means (22) of the CPU (61) determines that the vacuum degree detected by the pressure sensor (67) is P1.
It is judged whether or not it is smaller than s (step S10), and the degree of vacuum detected by the pressure sensor (67) is a preset reference pressure.
If it is determined that it is smaller than P1s (see FIGS. 9 and 10), the operation from step S6 is performed.

Further, when it is determined that the vacuum degree detected by the pressure sensor (67) is not lower than P1s, the dust volume determination means (22) of the CPU (61) causes the vacuum degree to have a preset reference pressure P4s.
(See FIG. 9 and FIG. 10) It is judged whether or not it is larger (step S11), and when it is judged that the degree of vacuum is larger than P4s, “Suction and sealing” is displayed on the display unit (20) (step S11). S12), set to slow operation (step S13) (seventh)
See figure).

If it is judged that the vacuum level is not higher than P4s, the CPU
The dust volume judging means (22) of (61) judges whether or not the degree of vacuum is higher than a preset reference pressure P3s (see FIGS. 9 and 10) (step S14), and the degree of vacuum becomes the reference. When it is determined that the pressure is higher than the pressure P3s, "full" is displayed on the display unit (20) (step S15), and the slow operation is set (step S13) (see FIG. 7).

Then, when it is determined that the vacuum degree is not higher than the reference pressure P3s, the dust volume determination means (22) of the CPU (61) causes the vacuum degree to have a preset reference pressure P2s (see FIGS. 9 and 1).
(See FIG. 0), it is determined whether or not it is higher (step S16), and when it is determined that the degree of vacuum is higher than a preset reference pressure P2s (see FIGS. 9 and 10), the display unit (20)
"Almost full" is displayed on (step S17), and the slow operation is ended (step S18).

Then, the CPU (61) has a start switch (17), (18).
Alternatively, scan (19) to determine whether there is a switch input (step S19), and select the start switch (1
The operation corresponding to 7), (18) or (19) is performed (for example, when the “L” switch (17) is pressed, the CPU (61)
Controls the triac (75) to perform "L" operation (step S20).

During operation corresponding to the start switch (17), (18) or (19), the CPU (61) compares the degree of vacuum detected by the pressure switch (67) with the reference pressure, as described above. The amount is detected (step S21).

If it is determined in step S16 that the degree of vacuum is not greater than the preset reference pressure P2s (see FIGS. 9 and 10), the CPU (61) displays the dust volume determination means (22), "Can still suck" is displayed on the section (20) (step S22), and the operation after step S18 is performed.

The start switches (17), (18) and (19) are off.
During the stopped mode, the CPU (61) stores the LED of the display unit (20) that was lit just before in the memory (65), and
Keep ED illuminated (see Figure 7).

Next, an embodiment of claim 2 of the present invention will be described with reference to the flowchart of FIG.

When the power plug of the electric vacuum cleaner (1) is connected to the outlet of the commercial power supply (58), the CPU (61) sets the input of the electric blower (3) (step S1) (see FIG. 8).

Then, the operation section determination means (21) of the CPU (61) is configured to activate the start switch (17), (18) or (19) of the remote section (34).
When it is determined that the start switches (17), (18) and (19) are in the OFF state (step S2), the motor of the electric blower (3) is stopped (step S2).
3), slow operation is set to start from slow operation when restarting (step S4), then step S1
Return to.

When it is determined that the start switch (17), (18) or (19) is in the ON state, the CPU (61) causes the pressure sensor (6
7) is abnormal or not (step S5), the pressure sensor (6
When it is determined that 7) is abnormal, the sensor abnormality is displayed on the display unit (20) (step S6), the sensor abnormality is set (step S7), and the operations after step S3 are performed.

When it is determined that the pressure sensor (67) is not abnormal, the CPU (61) determines whether or not the slow operation is set (step S8), and when it is determined that the slow operation is not set, the CPU (61) (61) Nozzle sliding judgment means (2
3) determines whether or not the suction nozzle (36) is sliding, that is, whether or not cleaning is in progress, based on the dynamic signal from the pressure sensor (67) (step S22a).

Then, when it is determined that the suction nozzle (36) is sliding, the start switches (17), (18) and (19) are scanned to determine the presence or absence of switch input (step S1
9), the operation corresponding to the selected start switch (17), (18) or (19) is performed (for example, when the "L" switch (17) is pressed, the CPU (61) causes the triac (7) to operate.
5) is controlled to perform "L" operation) (step S20).

If it is determined that the slow operation is set, the slow operation is performed (step S9) and the CPU
(61) determines whether or not the degree of vacuum detected by the pressure sensor (67) is smaller than P1s (step S10), and the pressure sensor (6
The standard pressure P1s for which the degree of vacuum detected by 7) is preset
(See FIG. 9 and FIG. 10) If it is determined that the size is smaller than the above, the operations after step S6 are performed.

When the pressure sensor (67) determines that the degree of vacuum detected is not lower than P1s, the CPU (61) determines the degree of vacuum from the preset reference pressure P4s (see FIGS. 9 and 10). If it is determined that it is larger (step S11), and if it is determined that the degree of vacuum is larger than P4s, "Suction and sealing" is displayed on the display unit (20) (step S12), and slow operation is set (step S13). ) (See FIG. 8).

If it is judged that the vacuum level is not higher than P4s, the CPU
(61) is the reference pressure P3s for which the degree of vacuum is preset
(See FIGS. 9 and 10) It is judged whether or not it is larger (step S14), and when it is judged that the degree of vacuum is larger than the reference pressure P3s, "full" is displayed on the display unit (20) (step S14). S15), slow operation is set (step S13) (see FIG. 8).

When it is determined that the vacuum degree is not higher than the reference pressure P3s, the CPU (61) determines whether the vacuum degree is higher than the preset reference pressure P2s (see FIGS. 9 and 10). (Step S16), when it is determined that the degree of vacuum is higher than the preset reference pressure P2s (see FIGS. 9 and 10), "almost full" is displayed on the display unit (20) (Step S17). , Slow operation ends (step S1
8).

Then, the CPU (61) has a start switch (17), (18).
Alternatively, scan (19) to determine whether there is a switch input (step S19), and select the start switch (1
The operation corresponding to 7), (18) or (19) is performed (for example, when the “L” switch (17) is pressed, the CPU (61)
Controls the triac (75) to perform "L" operation (step S20).

During the setting operation, the nozzle sliding judgment means (2
In 3), the presence or absence of sliding of the suction nozzle (36) is detected, and if there is no sliding, slow operation is performed (see FIG. 8).

Further, in the above-mentioned embodiment, the pressure sensor (6) is used as the nozzle sliding detection means for detecting the sliding of the suction nozzle (36).
Although the nozzle sliding determination means (23) for detecting the dynamic signal of 7) is used for the description, the invention is not limited to this, and any means capable of detecting the sliding of the suction nozzle (36) may be used.

Next, an embodiment of claim 3 of the present invention will be described with reference to the flowchart of FIG.

When the power plug of the electric vacuum cleaner (1) is connected to the outlet of the commercial power supply (58), the CPU (61) causes the start switch (1)
7), (18) and (19) are scanned to determine the presence / absence of switch input (step S23), and the start switch (1
If it is determined that 7), (18) and (19) are not turned on, stop the motor of the electric blower (3) and wait until the start switch (17), (18) or (19) is turned on. Yes (step S24).

When it is determined that the start switch (17), (18) or (19) is turned on, the CPU (61) causes the pressure sensor (6
The nozzle sliding determination means (23) for detecting the dynamic signal of 7) determines whether the suction nozzle (36) is sliding, that is, whether cleaning is in progress (step S25), and the suction nozzle (36) If it is determined that the slide is sliding, the operation corresponding to the start switch (17), (18) or (19) is performed (for example, when the "L" switch (17) is pressed, the CP
The U (61) controls the triac (75) to perform “L” operation (step S26).

Then, the CPU (61) resets the timer (64) (step S27), compares the degree of vacuum detected by the pressure sensor (67) with the reference pressure in the same manner as described above, and determines the amount of dust (step S28). ).

In step S25, the suction nozzle (36)
When it is determined that is not sliding, the CPU (61) controls the triac (75) to perform the slow operation of the electric blower (3) (step S29) and increment the timer (64) (step S30). ).

Then, the CPU (61) determines whether or not the timer (64) has timed out (5 to 10 min) (step S31), and when it determines that the timer (64) has timed out, clears the start switch. The electric blower (3) is stopped (step S32).

When it is determined that the timer (64) has not timed out, the operations after step S28 described above are performed.

[Effects of the Invention] As described above, according to the present invention, the electric blower is driven at the lowest level within the output control range for a predetermined time after the power is turned on, and the dust is collected by the information from the pressure sensor during that period. Since it is configured to detect the amount of dust in the room and control the input of the electric blower, the amount of dust can be judged without raising the output up to the target output operation, preventing inrush current and protecting the element. Thus, energy saving and noise reduction can be achieved.

When the nozzle is not sliding due to the signal from the nozzle sliding detection means, the control means is configured to drive and control the electric blower at the lowest level within the output control range.
When cleaning is not performed, the slow operation can be performed to save energy and reduce noise, and it is not necessary to set the reference pressure for each input, so that the memory can be simplified.

Further, when the nozzle has not slid for a predetermined time or more in response to a signal from the nozzle sliding detection means, the control means is configured to stop and control the electric blower, so that the electric blower can be operated when cleaning is not performed. By stopping, energy saving and noise reduction can be achieved.

[Brief description of drawings]

1 is a diagram showing an electric vacuum cleaner according to an embodiment of the present invention, FIG. 2 is an electric circuit diagram of a control unit of the electric vacuum cleaner according to an embodiment of the present invention, and FIG. 3 is an operation timing pulse of an electric blower. 4 to 6 are flowcharts showing the operation of the present invention, FIGS. 7 and 8 are diagrams showing the operation of the present invention, and FIGS. 9 and 10 are P of the vacuum cleaner. -Q characteristic diagram, FIG. 11 is a cross-sectional view showing the structure of the conventional vacuum cleaner, FIG. 12 is an electric circuit diagram of the conventional vacuum cleaner, and FIG.
The figure is a diagram showing a P-Q characteristic diagram of a conventional electric vacuum cleaner and a relationship between air volume and input power. In the figure, (2) is the main body, (3) is an electric blower, and (2
3) is a nozzle sliding judgment means, (33) is a hose, (36) is a nozzle part, (61) control means, and (67) is a pressure sensor. The same reference numerals in the drawings indicate the same or corresponding parts.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshiyasu Hikuma 2-14-40 Ofuna, Kamakura-shi, Kanagawa Mitsubishi Electric Corporation Living Systems Laboratory (72) Inventor Akihiro Iwahara 1728 Omaeda, Hanazono-cho, Osato-gun, Saitama Prefecture 1 Within Mitsubishi Electric Home Equipment Co., Ltd.

Claims (4)

[Claims] 1. A vacuum cleaner provided with a vacuum cleaner main body having an electric blower, a hose connected to the vacuum cleaner main body, and a suction nozzle disposed at a tip of the hose, the vacuum cleaner being provided in an air flow path. The electric blower is provided with a pressure sensor for detecting the generated air volume and a control means for inputting a signal from the pressure sensor, and the control means is the lowest level within the output control range for a predetermined time after the power is turned on. The electric vacuum cleaner is characterized in that the volume of dust in the dust collecting chamber is detected by driving information from the pressure sensor. 2. The control means drives the electric blower at the lowest level within the output control range for a predetermined time after the power is turned on, and the dust capacity in the dust collecting chamber is controlled by the information from the pressure sensor during that period. The electric vacuum cleaner according to claim 1, wherein the electric blower is detected and the input control of the electric blower is performed based on the detection signal. 3. A nozzle sliding detection means for detecting sliding of the suction nozzle is provided, and when the nozzle is not sliding due to a signal from the nozzle sliding detection means, the control means is the lowest in the output control range. The electric vacuum cleaner according to claim 1, wherein the electric blower is driven and controlled at a level. 4. The electric vacuum cleaner according to claim 3, wherein when the nozzle has not slid for a predetermined time or more in response to a signal from the nozzle sliding detection means, the control means controls the electric blower to stop.