JPH0697869B2 - 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, by changing the resistance value, changing the charging time of the charging capacitor and changing the trigger time, phase control is performed to 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 Laid-Open No. 57-32653, as shown in FIGS. 11 and 12, the end of the resistance pattern 1 in the direction in which the resistance value of the resistance pattern 1 increases. And the end of the second conductive pattern 2 connected to the fixed resistor for correction are located at 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, there is a problem that it is set by the resistance pattern 1 with many errors and the input voltage of the electric blower is not stable.

(Problems to be Solved by the Invention) As described above, since the resistance pattern has a large error, the electric vacuum cleaners disclosed in Japanese Utility Model Laid-Open No. 57-32653 and Japanese Patent Laid-Open No. There is a problem that there is a large error in the input voltage when starting the blower.

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 Problems) According to the present invention, 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 provided at the gate of the bidirectional thyristor. A gate trigger circuit for triggering the bidirectional thyristor based on the charging of the charging circuit, the charging circuit being a charging power source,
In a vacuum cleaner having a charging capacitor connected to the charging power source and a series circuit of a variable resistance section for setting a variable charging cycle, the variable resistance section sets the maximum input of the electric blower at one end side and the other end. Side, a resistance pattern for setting a minimum input of the electric blower, a correction resistance having one end connected to one end side for setting the maximum input of the resistance pattern, and a first conductive pattern for extracting a resistance output of the resistance pattern A second conductive pattern in which the other end of the correction resistor is connected, and the other end corresponding to the other end side of the resistance pattern is located on the one end side from the other end position of the resistance pattern; and the second conductive pattern. A third conductive pattern for taking out the output of the pattern, a first slider for connecting and sliding the resistance pattern and the first conductive pattern, the second conductive pattern and the front A third slider is connected and slid, and a second slider that responds to the first slider is provided. The maximum input side of the resistance pattern is connected to one of the charging power source and the charging capacitor. , The first conductive pattern and the third conductive pattern are connected to the other of the charging power source and the charging capacitor, respectively.

(Function) In the electric vacuum cleaner of the present invention, since the resistance pattern is longer than the second conductive pattern on the other end side for setting the minimum input of the resistance pattern, when the electric blower is turned off to the minimum input. First, by connecting the resistance pattern of the variable resistance part and the first conductive pattern first by the first slider, only the resistance pattern is connected to the charging capacitor first, but the resistance value only with the resistance pattern. Is high,
Do not operate the electric blower. Furthermore, when the first slider and the second slider are moved, the second conductive element connects the first conductive pattern and the third conductive pattern in parallel to the resistance pattern. Since the compensation resistor is connected to the charging capacitor, the resistance value changes continuously from the lowest input without an electrical step, so the compensation error can be reduced by the compensation resistor and The input of the blower is 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 23 into which an extension pipe 22 or the like is removably inserted and connected is provided at the tip of the hose 17, and the hand control operation unit 16 is provided in 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 is as shown in FIG.

The commercial AC power supply 36 is connected via a fuse 37 to a capacitor.
A series circuit of a triac 31 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 temporary 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 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, connect the resistor 50 and Zener diode 51 to the connector.
The resistance pattern 56 and the first conductive pattern 57 and the resistance pattern 56 and the first conductive pattern 57 are slidably contacted with each other through the transmission line in the hose 17 via the plug plug 21 and the plug 19. It is connected to the variable resistor 59 composed of the child 58, and is also connected to the second conductive pattern 61 from the correction resistor 60. 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. The first conductive pattern 57 and the third conductive pattern 62 are connected at one end. Then, from the variable resistor 59 and the correction resistor 60, the variable resistor unit 32
Is configured.

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 connected to the connection point of the resistor 64 and the charging capacitor 65, the cathode is connected to one end of the primary winding of the pulse transformer 70, and the other end of the pulse transformer 70 is connected to the negative output side of the diode bridge 49. Has been done. 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.
Are 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 the position of 26.7 mm, the second conductive pattern 61 and the third conductive pattern 62 up to the 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, when the cursor 31 is slid and moved from the position where OFF is displayed, that is, when the first slider 58 and the second slider 63 are not in contact with each other, first, the first sliding Child
58 short-circuits the resistance pattern 56 and the first conductive pattern 57, and the total resistance of the resistance pattern 56, that is, the variable resistance 59.
Is a very high resistance value, the electric blower 12 does not operate until the minimum input of the design value. After that, the second slider 63 that is interlocked with the first slider 58 also short-circuits the second conductive pattern 61 and the third conductive pattern 62 by contact, and further corrects when the cursor 31 slides. The resistor 60 and the variable resistor 59 are connected in parallel, and since the combined resistance of the variable resistor 59 and the correction resistor 60 reduces the resistance value, the resistor 60 is turned on and the charging capacitor 65 is charged.

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. When the cursor 31 is set to the jutan side, the resistance value of the variable resistor 59 is lowered, the charging cycle of the charging capacitor 65 is shortened, and the number of triggers is 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.

Further, according to the above-described embodiment, first the first slider 58 first has the resistance pattern 56 before the second slider 63 comes into contact with the second conductive pattern 61 connected to the correction resistor 60. Since the resistance value does not change discontinuously after the electric blower 12 is driven, the resistance value does not change discontinuously after the electric blower 12 is driven. There is no step difference and stable control is possible.

The resistance value of the variable resistor 59 is lower than that of the correction resistor 60.
Since the resistance value is about 10 times higher and only the resistance pattern 56 is in contact until the second slider 63 comes into contact, the resistance value is much higher than the resistance value connected in parallel at the normal time. Is not charged, the electric blower 12 is not driven below the minimum input value of the design value, and the electric blower 12 is reliably started.

Further, FIG. 10 shows another embodiment, in which the resistance pattern 56 is arranged over the entire distance that the first slider 58 slides. Note that FIG. 9 is a relationship diagram between the position of the first slider 58 and the resistance value of the variable resistor 59, and the resistance value increases as the distance increases.

By disposing the resistance pattern 56 over the entire sliding distance in this way, an error in the resistance pattern 56 or the second conductive pattern 61, and a mechanical deviation between the first slider 58 and the second slider 63. It is not necessary to consider the end portion of the second conductive pattern 61 due to the above, and it is possible to easily control the electric blower 12 without an electrical step.

〔The invention's effect〕

According to the electric vacuum cleaner of the present invention, when the electric blower is turned from the OFF state to the minimum input, first, the first slider precedes to connect the resistance pattern of the variable resistance portion and the first conductive pattern. Thus, only the resistance pattern is connected to the charging capacitor first, and when the first slider and the second slider are further moved from this state, the resistance pattern is set in the state where the electric blower is stopped. On the other hand, since the correction resistor is connected in parallel and is connected to the charging capacitor, after the electric blower starts, the resistance value changes continuously from the lowest input without any electrical step. The resistance error can be reduced, 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,
FIG. 2 is a diagram showing the relationship between the position of the resistance pattern and the resistance value, FIG. 3 is an explanatory diagram of the variable resistance part of the same as above, FIG. 4 is a perspective view of the same as above, and FIG. 6 is a front view of the same, FIG. 7 is a side view of the same, FIG. 8 is a comparison view of the variable resistance value and the combined resistance value of the same, and FIG. 9 is a position of a resistance pattern of another embodiment of the vacuum cleaner. Resistance diagram, FIG. 10 is an explanatory diagram of the variable resistor portion of the same as above, FIG. 11 is a diagram of the relationship between the resistance pattern position and the resistance value of the conventional vacuum cleaner, and FIG. 12 is an explanatory diagram of the variable resistor portion as above. Is. 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 for connecting the charging source is connected, the charging circuit includes a charging power source, and a series circuit of a charging capacitor connected to the charging power source and a variable resistance unit for setting a variable charging cycle. The resistance part has 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 one end is connected to one end side that sets the maximum input of this resistance pattern. Correction resistance, a first conductive pattern for taking out a resistance output of the resistance pattern, and the other end of the correction resistance is connected to the resistance pattern. A second conductive pattern having the other end corresponding to the other end located on the one end side of the other end position of the resistance pattern; a third conductive pattern for taking out an output of the second conductive pattern; A first slider that connects and slides the first conductive pattern, and a second slider that connects and slides the second conductive pattern and the third conductive pattern and responds to the first slider. The maximum input side of the resistance pattern is one of the charging power source and the charging capacitor, and the first conductive pattern and the third conductive pattern are one of the charging power source and the charging capacitor. An electric vacuum cleaner characterized by being connected to each other.