JPH0697870B2 - Vacuum cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Industrial field of application) The present invention relates to an electric vacuum cleaner capable of input control of an electric fan for dust collection built in a cleaner body.

(Prior Art) As a conventional electric vacuum cleaner of this type, for example, SAIkai 57-3
The structures described in Japanese Patent No. 2653 and Japanese Patent Application Laid-Open No. 60-141190 are known.

The Japanese Utility Model Laid-Open No. 57-32653 and Japanese Patent Laid-Open No. 60-141.
In the electric vacuum cleaner described in Japanese Patent No. 190, an electric blower and a bidirectional thyristor are connected in series to a power source, and a charging circuit and a trigger circuit having a trigger element are connected to the bidirectional thyristor. The charging circuit is composed of a charging power supply, a charging capacitor, a charging resistor, etc., and this charging resistance is a variable resistor, and switches such as sliders are installed on the hand control operation unit or the cleaner body to change the resistance value. Let In this way, the resistance value is changed, the charging time of the charging capacitor is changed, and the trigger time is changed to perform phase control, control the input power to the electric blower, and change the output of the electric blower. There is.

However, since the variable resistor has an error in mass production of about 20% of the total resistance value, a fixed resistor for correction is connected in parallel with the variable resistor, and the variable resistor section has a relatively low resistance value and a fixed tolerance with a low tolerance. The parallel circuit of the resistance and the variable resistance makes the error variable by combining the variable resistance and the fixed resistance.
We are trying to make it about 3% of the 7th place.

However, in the structure of the electric vacuum cleaner disclosed in Japanese Utility Model Publication No. 57-32653, as shown in FIGS. 9 and 10, the end portion of the resistance pattern 1 in the direction in which the resistance value of the resistance pattern 1 increases. Then, the ends of the second conductive pattern 2 connected to the fixed resistance for correction are at positions of substantially the same length.

Therefore, when the electric vacuum cleaner is turned from the off state to the weak operation, the mechanical error of the first slider 3 and the second slider 4 and the pattern displacement of the resistance pattern 1 and the second conductive pattern 2 may cause The second conductive pattern 2 and the third conductive pattern 6 come into contact with each other, and the resistance pattern 1 and the first conductive pattern 5 come into contact with each other by the first slider 3 before the fixed resistance for correction comes into contact therewith. In this case, since the resistance value at the time of the minimum input is set by the resistance pattern 1, it is set by the resistance pattern 1 with many errors, and the input voltage of the electric blower is not stable.

On the contrary, the first conductive pattern 5 and the resistance pattern 1 come into contact with each other and the resistance pattern 1 and the first conductive pattern 5 come into contact with the first slider 3 due to the mechanical error or the pattern deviation. In some cases, the fixed resistance for correction may come into contact first, and in this case, the resistance value at the time of the minimum input is set by the fixed resistance for correction, so there is an electrical step and the resistance value continuously changes from the minimum input. The input voltage of the electric blower is not stable because it does not change.

(Problems to be Solved by the Invention) As described above, the resistance pattern has a large error, and if only the resistance pattern is connected first, a large error occurs in the input voltage.
There is a step on the input connected only to the fixed resistor for correction,
In the vacuum cleaners disclosed in Japanese Utility Model Laid-Open No. 57-32653 and Japanese Patent Laid-Open No. 60-141190, a large error occurs in the input voltage when starting the electric blower, or a step difference occurs in the input voltage. I have a problem.

The present invention has been made in view of the above problems, and even if the resistance pattern has an error, it is possible to provide an electrical step without causing a large error in the input voltage when the minimum input is applied. It is an object of the present invention to provide an electric vacuum cleaner that can start an electric blower that can continuously control the electric blower without the electric blower.

[Structure of Invention]

(Means for Solving the Problems) An electric vacuum cleaner according to the present invention is configured such that an electric blower and a bidirectional thyristor are connected in series to an AC power source, and a charging circuit and a trigger element are connected to a gate of the bidirectional thyristor. A gate trigger circuit that triggers the bidirectional thyristor based on the charging of the charging circuit is connected, and the charging circuit includes a charging power source, a charging capacitor connected to the charging circuit, and a variable resistance unit for setting a variable charging cycle. In the electric vacuum cleaner having a series circuit of, the variable resistance portion, a resistance pattern that sets the maximum input of the electric blower at one end side and the minimum input of the electric blower at the other end side, A correction resistor connected in parallel to the resistance pattern between both ends, a first conductive pattern for taking out a resistance output of the resistance pattern, and the resistance A second conductive pattern to which the other end side of the pattern and the other end side of the correction resistor are connected, a third conductive pattern for taking out the output of the second conductive pattern, the resistance pattern and the first conductive pattern And a second slider that connects and slides the second conductive pattern and the third conductive pattern and that reacts with the first slider. One end of the resistance pattern is connected to one of the charging power supply and the charging capacitor, and the first conductive pattern and the third conductive pattern are connected to the other of the charging power supply and the charging capacitor, respectively. It is a thing.

(Operation) In the electric vacuum cleaner of the present invention, when the correction resistance is connected in parallel to the resistance pattern and the electric blower is turned from the OFF state to the minimum input,
Regardless of which of the first slider and the second slider is connected first, the resistance pattern and the correction resistor are connected in parallel and connected to the charging capacitor, and only the resistance pattern or only the correction resistor is connected. Since the correction resistor and the resistance pattern are always connected without contacting first, the resistance value changes continuously from the lowest input without an electrical step, so the resistance error is reduced by the correction resistor. In addition, the input of the electric blower can be continuously controlled without a step.

(Embodiment) An embodiment of the electric vacuum cleaner of the present invention will be described below with reference to the drawings.

In FIG. 4, 11 is an electric vacuum cleaner main body, and this electric vacuum cleaner main body 11 has an electric blower 12, a triac 13 which is a bidirectional thyristor, a gate trigger circuit 14 and the like,
A dust collection case (15) forming a dust collection portion in which a dust collection filter is removably attached is detachably attached to the front part of the electric vacuum cleaner body (11). In the front part of this dust collection case 15,
There is a suction port 18 for detachably inserting and connecting a hose 17 for suction, which is provided with a transmission line consisting of two wires for reinforcing and also for connecting the gate trigger circuit 14 of the electric vacuum cleaner body 11 and the hand control operation section 16 therein. A connector 19 is provided which is opened and is adjacent to the suction port 18.

A connection pipe portion 20 is provided at the base end of the hose 17 so as to be inserted into and connected to the suction port 18. The connection pipe portion 20 has a connector 19 connected thereto.
A plug 21 is provided that is electrically connected to. A grip pipe 22 into which an extension pipe 22 or the like is inserted and removed is inserted and connected at the tip of the hose 17, and the hand control operation unit 16 is provided at the grip pipe 23. A suction port body 25 is removably provided at the tip of the extension pipe 22.

Further, as shown in FIG. 5 to FIG. 7, the hand permission control operation unit 16 provided on the hand permission operation unit 24 of the grip tube 23 at the tip of the hose 17.
On / off and the cursor 31 for setting the condition of the surface to be cleaned.
Is provided. And on this cursor 31
Selective setting of off and cleaning surface condition Variable resistance part
The resistance value of 32 is changed and output.

Further, the variable resistance portion 32 is connected via a lead wire arranged on the hose 17 by a plug 21 connected to a connector 19 provided adjacent to the suction port 18 of the electric vacuum cleaner body 11. Further, the resistance value of the variable resistance portion 32 is off when open, the larger the resistance value, the lighter the curtain, sofa, floor / tatami range, and conversely, the smaller the resistance value, the more the load is required. It becomes the Jutan range, and the range from the maximum resistance value to the minimum resistance value is distributed to, for example, four positions.
It is set by aligning the cursor 31 of with the display 34 of the display plate 33.

The circuit diagram of the above embodiment has the configuration shown in FIG.

The commercial AC power supply 36 is connected via a fuse 37 to a capacitor.
A series circuit of a triac 13 having a snubber circuit 40 for preventing false ignition and absorbing surge composed of 38 and a resistor 39 and an electric blower 12 is connected. Further, in the electric blower 12, capacitors 41, 42, 43 for noise prevention are connected to both ends of a commercial AC power supply 36 including a fuse 37. Further, the commercial AC power supply 36 including the fuse 37 has, for example, 15 to
The primary winding of the step-down transformer 44 that steps down to about 20V is connected, and the secondary winding is connected to the input terminal of the diode bridge 49 for full-wave rectification consisting of the diodes 45, 46, 47 and 48. . A resistor 50 is connected to the positive output side terminal of the diode bridge 49, and a Zener diode 51 having a rectangular rectified waveform is connected between the resistor 50 and the negative output side terminal of the diode bridge 49 for charging. It constitutes the power supply 52.

In addition, from the connection point of the resistor 50 and the Zener diode 51, through the connector 19 and the plug 21 and the transmission line in the hose 17, the resistance pattern 56 and the first conductive pattern 57, and the resistance pattern 56 and the first conductive pattern 57. The conductive pattern 57 is connected to a variable resistor 59 composed of a first slider 58 which is in sliding contact, the correction resistor 60 is connected in parallel to the resistance pattern 56, and to the second conductive pattern 61. It is connected. Further, the second conductive pattern 62 is provided with a second slider 63 which is in sliding contact with the second conductive pattern 61 and the third conductive pattern 62 and responds to the first slider 58. Connected through. In addition, the first conductive pattern 57 and the third
One end of the conductive pattern 62 is connected. Then, the variable resistance section 32 is composed of the variable resistance 59, the correction resistance 60, and the like.

Further, as shown in the equivalent circuit of FIG. 3, the correction resistor 60 is always connected in parallel with the pattern 56, and the second conductive pattern 61 is provided.
The third conductive pattern 62 and the third conductive pattern 62 come into contact with the second slider 63 to function as a switch 73.

In addition, the first conductive pattern 57 and the third conductive pattern
From the connected end of 62, through the transmission line of the hose 17, is connected to the resistor 64 via the plug 21, the connector 19,
A charging capacitor 65 is connected between the resistor 64 and the negative output side of the diode bridge 49. The charging power supply 52, the variable resistance section 32, the charging capacitor 65 and the like constitute a charging circuit 66.

Further, a series circuit of a resistor 67 and a resistor 68 that determines a trigger voltage is connected in parallel with the Zener diode 51, and a connection point of these resistors 67 and 68 serves as a trigger element.
The gate of PUT69 is connected. The anode of the PUT 69 is at the connection point of the resistor 64 and the charging capacitor 65, the cathode is at one end of the primary winding of the pulse transformer 70, and the other end of the pulse transformer 70 is at the negative output side of the diode brush 49. It is connected. Further, at one end of the secondary winding of the pulse transformer 70, a resistor 71 and a diode 72 for controlling the output from the pulse transformer 70 to prevent malfunction and overcurrent.
Is controlled to be connected to the gate of the triac 13, and the other end is connected to the commercial AC power source 36 via the fuse 37. Further, the PUT 69, the charging circuit 66, etc. constitute the gate trigger circuit 14.

As shown in FIG. 3, the variable resistor 32 is connected to the correction resistor 60 in a direction in which the resistance value of the resistance pattern 56 increases in a direction in which the resistance value decreases from the end of the resistance pattern 56 in the direction in which the resistance value decreases. The end portion of the second conductive pattern 61 is disposed.

Note that the distance that the first slider 58 and the second slider 63 slide is, for example, 30 mm, and the end portion of the resistance pattern 56 is 27 mm.
Up to a position of 26.7 mm, and the second conductive pattern 61 and the third conductive pattern 62 up to a position of 27 mm.

Further, FIG. 2 shows the relationship between the position of the first slider 58 and the resistance value of the variable resistor 59. The longer the distance, the higher the resistance value.

Next, the operation of the above embodiment will be described.

First, the grip tube 23 of the hose 17 connected to the vacuum cleaner body 11
When gripping and cleaning the hand, the cursor 31 of the hand operation control unit 16 is moved in the longitudinal direction of the hand operation unit 24 according to the cleaning location, for example, jutan, floor / tatami, sofa, curtain, or the like. Due to this movement, the first slider 58 and the second slider 63 move in response to the cursor 31, and the first slider 58 slides on the resistance pattern 56, thereby changing the variable resistance. The resistance value of 59 changes. And a charging capacitor
The cycle of charging to 65 is also changed, the gate trigger control angle of the PUT 69 is changed, and the operation time of the triac 13 is changed, so that the output of the electric blower 12 is controlled.

Further, before the first slider 58 contacts the resistance pattern 56 and the first conductive pattern 57, the second slider 63 contacts the second conductive pattern 61 and the third conductive pattern 62. However, since the correction resistor 60 that is always connected in parallel to the resistance pattern 56 is in contact with the second conductive pattern 61 through the resistance pattern 56, the charging capacitor 65 is not connected only to the correction resistor 60. , Since it always starts after contacting the resistance pattern 56, no electrical step is generated.

On the contrary, even when only the first slider 58 contacts, the correction resistor 60 is connected in parallel with the resistance pattern 56, but the total resistance value of the resistance pattern 56 is added,
Since the resistance is very high, the charging capacitor 56 is not charged and the electric blower 12 does not turn on.

Then, when the switch is turned on as described above, the commercial AC power supply 36 is stepped down by the transformer 44, and then the diode bridge
The full-wave rectified by 49, the rectangular wave by the Zener diode 51 and the constant voltage is charged to the charging capacitor 65 by controlling the charging cycle by the charging circuit 66 such as the variable resistor 59, the correction resistor 60 and the resistor 64. It In addition, this charging capacitor 65
When the voltage between both ends of PUT becomes the reference voltage set by resistors 67 and 68, PUT69 turns on and the charge of charging capacitor 65 becomes P
It is discharged from the anode side electrode of UT69 to the cathode side electrode,
A trigger current flows from the cathode side electrode of the PUT 69 through the pulse transformer 70 to the gate of the triac 13, and the triac 13 is turned on. And this TRIAC 13
When is turned on, a current flows through the triac 13 to control the electric blower 12. In addition, when the cursor 31 is moved to the jutan side, the resistance value of the variable resistor 59 is lowered, the charging cycle of the charging content 65 is shortened, and the number of triggers is also increased.
12 outputs increase.

Note that FIG. 8 is a comparison diagram between the case of only the conventional variable resistor 59 and the case of connecting the correction resistor 60 in parallel with the variable resistor 59.

As shown in Fig. 8, in the case of combined resistance, 14.7 [K
Ω] and 210 [KΩ] in the case of only the variable resistor 59, and about 1/15 in the case of the combined resistor as compared with the case of only the variable resistor 59. Regarding the error, A is about 20% in the case of only the variable resistor 59, while B is 5% and stable in the case of the combined resistor, which is stable.

According to the above-mentioned embodiment, even if the second slider 63 comes into contact with the second conductive pattern 61 connected to the correction resistor 60, the correction resistor 60 is always connected in parallel with the resistance pattern 56. 60
Since it is not connected only, the resistance value from the minimum input when controlling the electric blower 12 can be stably controlled without an electrical step, and since only the correction resistor 60 is not connected, the minimum input value of the design value In the following, the electric blower 12 is not driven and the electric blower 12 is surely activated.

Furthermore, the correction resistor 60 can be used without changing the resistance pattern 56.
Controlling the output of the electric blower 12 can eliminate the electric step only by changing the connection.

〔The invention's effect〕

According to the electric vacuum cleaner of the present invention, since the correction resistance is connected in parallel to the resistance pattern, when the electric blower is switched from the OFF state to the minimum input, the electric resistance of the first slider and the second slider is reduced. Whichever is connected first, the resistance pattern and the correction resistor are connected in parallel and connected to the charging capacitor, so only the correction resistor does not come into contact first and the resistance pattern is always connected, so Since the resistance value is continuously decreased from the lowest input without a constant step, the resistance error can be reduced by the correction resistance, and the input of the electric blower can be continuously controlled without a step.

[Brief description of drawings]

FIG. 1 is a circuit diagram of an electric vacuum cleaner showing an embodiment of the present invention,
2 is an explanatory view of the position of the resistance pattern of the same as above, FIG. 3 is an equivalent explanatory view of the variable resistance portion of the same as above, FIG. 4 is an overall perspective view of the same electric vacuum cleaner, and FIG. Fig. 6 is a front view of the same as above, Fig. 7 is a side view of the same as above, Fig. 8 is a comparison diagram of the variable resistance value and combined resistance value of the same as above, and Fig. 9 is the position and resistance of the resistance pattern of the conventional vacuum cleaner FIG. 10 is a diagram showing the relationship between values, and FIG. 12 …… electric blower, 13 …… triac as bidirectional thyristor, 14 …… gate trigger circuit, 32 …… variable resistance part, 36 …… AC power supply, 52 …… charging power supply, 56 …… resistance pattern, 57 ...... First conductive pattern, 58 …… First slider, 60 …… Compensation resistor, 61 …… Second conductive pattern, 62 ・ ・ ・
… Third conductive pattern, 63 …… Second slider, 65 …… Charging capacitor, 66 …… Charging circuit, 69 …… PUT as trigger element.

Claims (1)

[Claims] 1. An electric blower and a bidirectional thyristor are connected in series to an AC power source, and a gate of the bidirectional thyristor comprises a charging circuit and a trigger element, and the bidirectional thyristor is charged based on the charging of the charging circuit. In the vacuum cleaner, a gate trigger circuit that connects the charging circuit is connected, and the charging circuit includes a charging power source, and a series circuit of a charging capacitor connected to the charging circuit and a variable resistance unit for setting a variable charging cycle. The resistance part is connected in parallel to this resistance pattern between a resistance pattern that sets the maximum input of the electric blower at one end side and the minimum input of the electric blower at the other end side, and between both ends of this resistance pattern. Correction resistance, a first conductive pattern for taking out the resistance output of the resistance pattern, and the other end side of the resistance pattern and the correction resistance. A second conductive pattern whose end side is connected, a third conductive pattern for taking out the output of the second conductive pattern, and a first slider for connecting and sliding the resistance pattern and the first conductive pattern. And a second slider that connects and slides the second conductive pattern and the third conductive pattern, and reacts with the first slider, wherein one end side of the resistance pattern is charged. An electric vacuum cleaner, wherein the first conductive pattern and the third conductive pattern are respectively connected to either one of a power source and a charging capacitor to the other of the charging power source and the charging capacitor.