JP2797915B2 - Ventilation equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilator having a control device operated by an AC power supply whose operation state can be changed by an external control input signal.

[0002]

2. Description of the Related Art FIGS. 11 and 12 show wiring connections of a ventilator with a speed control function which is generally well known in the prior art. There is a control signal input terminal Y for inputting a control signal from Z and an external control signal. A control signal from a control switch 102 connected to the control signal input terminal Y enables two-stage control of strong and weak. The motor 103 of the ventilation fan of the ventilator 100 has three connection terminals M, H, and L. When a power supply is connected between the terminals M and H, a strong operation state is established. If a power supply is connected in between, it will be in a weak operation state. Terminal H and terminal L are relay coil 1
Relay contacts 105 that operate depending on the presence or absence of current flowing through
Switches the connection with the power supply, thereby selecting between strong and weak. An operation switch 106 is installed together with the control switch 102 on a normal wall or the like as shown in FIG.

In the ventilation device 100 having the above configuration, when the operation switch 106 is turned on and the control switch 102 is turned off, no current flows through the relay coil 104 and the relay contact 105 is connected to the terminal H. Motor 1
03 is in a strong driving state. When the control switch 102 is turned on, a current flows to the relay coil 104 through the control signal input terminal Y, the relay contact 105 is connected to the terminal L side, and the motor 103 enters a weak operation state. When the operation switch 106 is turned off, the motor 103 stops. That is, the ventilation device 1
00 can be externally switched.

[0004]

In the ventilator described above, the power connection terminals X and Z and the control signal input terminal Y are functionally unique to each other, and are connected to the AC power supply 101 and the control switch of the external circuit. When connecting 102,
Normal operation will not be performed with a connection other than the proper connection as shown in FIG. In this case, there are power connection terminals X and Z and a control signal input terminal Y. In this case, the number of connection combinations is six in a permutation of three, and five of the connections are erroneously connected, resulting in erroneous connection. Probable.

Further, even when an erroneous connection is found, the symptoms that appear depending on the mode of the erroneous connection are different and complicated, so that the work of correcting the connection is cumbersome and troublesome. For example, FIG.
When an incorrect connection is made as shown in FIG. 7, the operation switch 106 is turned on regardless of the state of the control switch 102.
Is always in a strong driving state. Inspection of this erroneous connection is relatively easy in the case of the ventilator 100 in which the operating condition can be clearly understood from the outside, but the operating condition cannot be grasped from the outside due to low noise, etc. Things are not easy.

[0006] Further, as the living space such as a building is becoming more airtight, there is a strong demand for ventilation with an optimal ventilation flow rate for realizing an energy-saving and comfortable environment. There are also issues such as complaints about the problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a first ventilating apparatus.
The second is to reduce erroneous connections during construction, and the second is to improve controllability from the outside.

[0008]

According to a first aspect of the present invention, there is provided a ventilating apparatus including first and second power input terminals for inputting AC power, and a control signal input terminal for controlling an operation state of the ventilating device. Intermediate voltage generating means for generating a substantially intermediate voltage between the power supply input terminals, current direction limiting means for limiting the direction of current flowing to the control signal input terminal, and a circuit between the current direction limiting means and the intermediate voltage generating means. Current-to-voltage converting means for inputting a current signal flowing through the voltage converting means, converting the voltage into a voltage signal, voltage holding means for holding the output voltage of the current-voltage converting means, and voltage shifting means for shifting the output voltage of the voltage holding means. And a control device in which the operation state of the ventilator is similarly controlled regardless of whether the control signal input terminal is connected to either the first or second power supply input terminal via a switch, a variable resistor, or a fixed resistor. It includes those were.

According to a second aspect of the present invention, there is provided a ventilator including first and second power input terminals for inputting AC power, a control signal input terminal for controlling an operation state of the ventilator, and a power input terminal. An intermediate voltage generating means for generating a substantially intermediate voltage; a current direction limiting means for limiting the direction of a current flowing to the control signal input terminal; and a current signal flowing between the current direction limiting means and the intermediate voltage generating means. Rectifying means for rectifying in the direction, current-voltage converting means for inputting the rectified output current of the bridge rectifying means and converting it into a voltage signal, and voltage shifting means for shifting the output voltage of the current-voltage converting means. , Its control signal input terminal is connected to the first
No matter which one of the power supply terminal and the second power supply input terminal is connected via a switch or a variable resistor or a fixed resistor, a control device for controlling the operating state of the ventilator in the same manner is provided.

According to a third aspect of the present invention, there is provided a ventilator including a first and a second power input terminals for inputting AC power, a control signal input terminal for controlling an operation state of the ventilator, and a power input terminal. An intermediate voltage generating means for generating a substantially intermediate voltage; an absolute value means for obtaining an absolute value of a bidirectional current signal flowing out or flowing in from a control signal input terminal with respect to the voltage generated by the intermediate voltage generating means; Current-voltage conversion means for inputting a signal and converting it into a voltage signal, wherein the control signal input terminal is connected to either the first or second power supply input terminal via a switch or a variable resistor or a fixed resistor. Also has a control device in which the operating state of the ventilation device is similarly controlled.

According to a fourth aspect of the present invention, there is provided a ventilator including first and second power input terminals for inputting AC power, a control signal input terminal for controlling an operation state of the ventilator, and a power input terminal. Voltage generating means for generating a voltage that does not exceed a lower terminal voltage by more than a predetermined voltage, current direction limiting means for limiting the direction of current flowing to the control signal input terminal, and current direction limiting means Current-voltage converting means for inputting a current signal flowing between the current generating means and the voltage generating means and converting the current signal into a voltage signal, voltage holding means for holding an output voltage of the current-voltage converting means, and output voltage of the voltage holding means. Voltage shift means for shifting the voltage, and operating the ventilator regardless of whether the control signal input terminal is connected to either the first or second power supply input terminal via a switch or a variable resistor or a fixed resistor. Condition is that a control device which is similarly controlled.

According to a fifth aspect of the present invention, there is provided a ventilator including first and second power input terminals for inputting AC power, a control signal input terminal for controlling an operation state of the ventilator, and a power input terminal. Voltage generating means for generating a voltage that does not become lower than a higher terminal voltage by more than a certain voltage, current direction limiting means for limiting the direction of current flowing to the control signal input terminal, and current direction limiting means A current-voltage converter for inputting a current signal flowing between the current-voltage converter and the voltage generator, and converting the output voltage of the current-voltage converter into a voltage signal; and a control signal input terminal. No matter which of the first and second power supply input terminals is connected via a switch or a variable resistor or a fixed resistor, a control device is provided in which the operating state of the ventilator is similarly controlled.

[0013]

According to the first aspect of the present invention, the same function is achieved regardless of whether the control signal input terminal is connected to either the first or second power supply input terminal via a switch, a variable resistor, or a fixed resistor. Since there is no need to distinguish the second power supply input terminal, the number of combinations that are incorrectly connected is reduced.

In the second aspect of the present invention, the same function can be obtained even if the control signal input terminal is connected to either the first or second power supply input terminal via a switch, a variable resistor or a fixed resistor. Since there is no need to distinguish the second power supply input terminal, the number of erroneous connection combinations is reduced, and control can be performed continuously.

Also in the third aspect of the present invention, the same function is achieved regardless of whether the control signal input terminal is connected to either the first or second power supply input terminal via a switch, a variable resistor, or a fixed resistor. Since there is no need to distinguish the second power supply input terminal, the number of erroneous connection combinations is reduced, and control can be performed continuously.

Also in the invention of claim 4, the same function can be achieved even if the control signal input terminal is connected to either the first or second power supply input terminal via a switch or a variable resistor or a fixed resistor. Since it is not necessary to distinguish the second power input terminal, the number of combinations that are erroneously connected is reduced, and different control items can be implemented through a single control signal input terminal. Stable control is possible even with fluctuations in the voltage of the power supply.

Also in the fifth aspect of the present invention, the same function is achieved regardless of whether the control signal input terminal is connected to either the first or second power supply input terminal via a switch, a variable resistor, or a fixed resistor. Since it is not necessary to distinguish the second power input terminal, the number of combinations that are erroneously connected is reduced, and different control items can be implemented through a single control signal input terminal. Stable control is possible even with fluctuations in the voltage of the power supply.

[0018]

[Embodiment 1] In FIG. 1 showing a circuit configuration of a control device of a ventilator as one embodiment of the present invention, an external circuit configured outside the ventilator is provided on the AC power supply 1 side, and an internal circuit configured on the ventilator side is provided. Connected to the circuit. The ventilator is provided with a connection terminal 2 for connecting an external circuit and an internal circuit. The connection terminal 2 is provided with three terminals of first and second power supply input terminals X and Z and a control signal input terminal Y, and includes an AC power supply 1 and a power switch 3 provided in series with the AC power supply 1. Control switch 4 connected to one of power supply input terminals X and Z via input terminal Y
And an external circuit composed of

The control signal input terminal Y is connected via a resistor 5 to a diode 6 as current direction limiting means for limiting the direction of current, and the diode 6 is connected to a resistor 7 as current / voltage converting means. I have. Power input terminals X, Z
Between the power supply input terminals X and Z, an intermediate voltage generating means 10 composed of resistors 8 and 9 for generating a substantially intermediate voltage between the power input terminals X and Z is inserted. This intermediate voltage generating means 10
Is connected to the resistor 7, and a current flowing between the intermediate voltage generating means 10 and the diode 6 is converted into a voltage by the resistor 7.

A capacitor 11 as voltage holding means is connected to both ends of the resistor 7, and the output voltage of the resistor 7 is held by the capacitor 11. Voltage shift means 12 is connected to the capacitor 11 to shift the voltage held in the capacitor 11. The voltage shift means 12 includes a resistor 13, a transistor 14, and a resistor 15 connected in series, and shifts the voltage held in the capacitor 11 to a control voltage corresponding to a reference voltage of the control unit. A diode 16 connected to the collector of the transistor 14 of the voltage shift means 12 is for protection against applying a reverse voltage to the transistor 14, and is supplied with an alternating current flowing from the transistor 14 by a capacitor 17 provided in parallel with the resistor 15. A DC control voltage is generated from a control current for a half cycle of the power supply 1. This control voltage is applied to the base of the transistor 18 for relay drive.

A relay coil 19 is connected to the collector side of the transistor 18, and a relay contact 20 which operates according to the presence or absence of a current flowing through the relay coil 19 is connected between a motor 21 of a ventilation fan of a ventilator and a power supply. The motor 21 of the blower fan has three connection terminals M, H, and L. The terminals H and L are switched by the relay contacts 20. In the figure, reference numerals 22 and 23 denote a diode and a capacitor which constitute a relay power supply circuit.
An operation display circuit including a light-emitting diode 24 and a resistor 25 is provided in parallel with the motor 21 through the operation circuit 2. Also, 2
Reference numeral 6 denotes a protection diode for protecting the transistor 18 from a surge voltage generated when the current of the relay coil 19 is cut off.

In the ventilator of the above configuration, when the power switch 3 is off, no voltage is generated at the power input terminals X, Z and the control signal input terminal Y, so that the motor 21 is stopped. When the power switch 3 is turned on and the control switch 4 is turned off, the control signal input terminal Y is open, so that no current flows through the resistor 5 or the resistor 7. Therefore, the transistor 14 is also off and no voltage is generated across the resistor 15. Therefore, the transistor 18 is also off, no current flows through the relay coil 19, the relay contact 20 is connected to the terminal H side, and the motor 21 is in a strong operation state.

When the power switch 3 is turned on and the control switch 4 is turned on, the light emitting diode 24
, During the half cycle of the AC power supply 1 in which the voltage of the power input terminal Z becomes higher than the power input terminal X (hereinafter referred to as a negative half cycle), the resistor 9, the resistor 7, the diode 6 A current flows through a path extending to the power supply input terminal X through the resistor 5, the control signal input terminal Y, and the control switch 4, and a voltage is generated at both ends of the resistor 7. Thereby, the capacitor 11 is charged and its voltage is held. At this time, since a reverse voltage is applied to the diode 16, no current flows through the resistor 15. On the other hand, in a half cycle (hereinafter referred to as a positive half cycle) of the AC power supply 1 in which the voltage of the power input terminal X is higher than the voltage of the power input terminal Z, a reverse voltage is applied to the diode 6 so that the current flows through the resistor 7. Not flowing. However, since the voltage is held in the capacitor 11, a current substantially proportional to the voltage of the capacitor 11 flows from the power input terminal X through the resistor 8, the resistor 13, the transistor 14, the diode 16, and the resistor 15. It flows along the path leading to the power input terminal Z. As a result, a voltage is generated at both ends of the resistor 15 and the transistor 17 is turned on at the same time as the capacitor 17 is charged.
Current flows through Therefore, the relay contact 20 is switched to the terminal L side of the motor 21, and the motor 21 enters a weak operation state.

Next, when the position of the control switch 4 is changed from the position indicated by the solid line to the position indicated by the imaginary line in FIG. 1, when the power switch 3 is turned on and the control switch 4 is turned on. In this case, in the negative half cycle of the AC power supply 1, a reverse voltage is applied to the diode 6, so that no current flows through the resistor 7 and no voltage is generated across the resistor 7. In the positive half cycle of AC power supply 1,
It flows along a path from the power input terminal X to the power input terminal Z through the resistor 8, the resistor 7, the diode 6, the resistor 5, the control signal input terminal Y, and the control switch 4. Therefore, a voltage is generated at both ends of the resistor 7, and the capacitor 11 is charged and the voltage is held. At this time, since a forward voltage is applied to the diode 16, a current substantially proportional to the voltage across the capacitor 11 flows from the power input terminal X through the resistor 8, the resistor 13, the transistor 14, the diode 16, and the resistor 15. A current flows in a path leading to the power input terminal Z, and the resistance 15
, A voltage is generated at both ends, and the transistor 17 is turned on at the same time as the capacitor 17 is charged, and a current flows through the relay coil 19. Therefore, the relay contact 20 is
1 is switched to the terminal L side, and the motor 21 enters a weak operation state. That is, even if the position of the control switch 4 is changed, it functions exactly as described above.

This means that the power input terminals X and Z do not need to be distinguished at all. Therefore, the number of combinations that cause erroneous connection is reduced accordingly.
If either the power input terminal X or the power input terminal Z is incorrectly connected, the motor 21 does not move at all, and it is easy to find out that the connection is incorrect. If the power switch 3 is turned on and the light emitting diode 24 does not light up, it can be determined that all connections are erroneous, and if the operating state cannot be easily determined based on the installation position, noise, etc. Since the operation state can be confirmed by turning off the light, it is easy to confirm the incorrect connection.

It should be noted that the same functions as described above can be achieved even if the diodes 6, 16, 22, 26 and the light emitting diode 24 are all reversed from those in FIG. 1, the transistor 14 is of the NPN type, and the transistor 18 is of the PNP type. Will be.

Embodiment 2 FIG. FIG. 2 shows a circuit configuration of a control device for a ventilating apparatus according to another embodiment of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals and are denoted by the same reference numerals in FIG. 2, and detailed description thereof will be omitted.

In FIG. 2, an AC power supply 1 is applied to power supply input terminals X and Z by a power switch 3. Further, the control signal input terminal Y is connected to a power input terminal X or a power input terminal Z via a variable resistor 27. An intermediate voltage generating means 10 is connected between the power input terminals X and Z.
This intermediate voltage generating means 10 is composed of resistors 8, 9 and diodes 28, 29, and has a power input terminal X,
Generates a voltage approximately in the middle of Z. The difference signal between the control signal input terminal Y and the intermediate voltage generating means 10 is
The current is rectified by bridge rectification means 34 composed of 0 to 33.

The output of the bridge rectifier 34 is passed through the resistor 7 serving as a current-voltage converter, and is converted into a voltage. Resistance 7
The voltage generated at both ends is shifted by the voltage shift means 12 as a control voltage with respect to the reference voltage of the control part. The control voltage shifted by the voltage shift means 12 is input to the voltage comparator 35. A sawtooth voltage signal as shown in FIG. 3A is applied between the terminals P and Q in FIG. 2 on the input terminal side of the voltage comparator 35, and the voltage across the resistor 15 and this voltage signal are compared. Are compared by the device 35. The output of the voltage comparator 35 is a MOS transistor 36
To cause the MOS transistor 36 to perform a switching operation. The MOS transistor 36 and the diode bridge 37 constitute a switching circuit for interrupting the AC current to the motor 21. The motor 21 has a snubber circuit composed of a resistor 38 and a capacitor 39 in parallel. In the negative half cycle of the AC power supply 1, the voltage waveforms at the power supply input terminals X and Z viewed from the terminal Q are as shown in FIGS. 4c and 4d, respectively, and the MOS transistor 36 shown in FIG. The diodes 28 and 29 are inserted in the intermediate voltage generating means 10 so as not to be affected by the switching operation. FIG. 4A shows a voltage waveform of the power input terminal X with respect to the power input terminal Z.

In the ventilator having the above-described structure, when the power switch 3 is off, the motor 21
Has stopped. When the power switch 3 is turned on, the variable resistor 27, the control signal input terminal Y, the resistor 5, the diode 30, the resistor 7, the diode 31, the resistor 9, A current flows through a path through the diode 29 to the power input terminal Z, and a voltage is generated across the resistor 7. A current substantially proportional to this voltage flows from the power supply input terminal X through the path of the variable resistor 27, the control signal input terminal Y, the resistor 5, the diode 30, the resistor 13, the transistor 14, the diode 16, and the resistor 15 to both ends of the resistor 15. The generated voltage is charged in the capacitor 17. On the other hand, in the negative half cycle of the AC power supply 1, a reverse voltage is applied to the diodes 28, 29 and the diode 16, so that no current flows through the resistor 7. However, a DC control voltage is supplied to the voltage comparator 35 by the electric charge stored in the capacitor 17 during the positive half cycle.

When the resistance value of the variable resistor 27 is increased, the current flowing through the resistor 7 decreases and the collector current of the transistor 14 also decreases, so that the voltage generated across the resistor 15 also decreases. For example, when the voltage generated at both ends of the resistor 15 is V1 shown in FIG. 3A, the output of the voltage comparator 35 has a long on-time as shown in FIG. 3B, and the motor 21 rotates at high speed. When the voltage generated at both ends of the resistor 15 is V2 shown in FIG. 3A, the output of the voltage comparator 35 has a short ON time as shown in FIG. 3C, and the motor 21 rotates at a low speed. . Therefore, by changing the resistance value of the variable resistor 27, the rotation speed of the motor 21 can be continuously changed.

Considering the case where the variable resistor 27 is connected between the control signal input terminal Y and the power supply input terminal X shown in FIG. Are in the ON state, the diode 28, the resistor 8, the diode 32, the resistor 7, the diode 33, the resistor 5, the control signal input terminal Y, the variable resistor 2
7. A current flows through the path of the power input terminal Z, and a voltage is generated across the resistor 7. A current substantially proportional to this voltage is supplied from the power supply input terminal X to the diode 28, the resistor 8, the diode 3
2, since the current flows through the path of the resistor 13, the transistor 14, the diode 16, and the resistor 15, a voltage is generated across the resistor 15 and the capacitor 17 is charged. Therefore, the resistance 15
Can be controlled by changing the resistance value of the variable resistor 27 in the same manner as when the variable resistor 27 is connected to the position shown in FIG.

This means that there is no need to distinguish between the power input terminals X and Z as in the first embodiment. Therefore, the number of combinations that cause erroneous connection is reduced accordingly. If either the power input terminal X or the power input terminal Z is incorrectly connected, the motor 21 does not move at all, and it is easy to find out that the connection is incorrect. When the power switch 3 is on, the light emitting diode 24
If the LED does not light up, it can be determined that all connections are erroneous. If the operating state cannot be easily determined by the installation position or noise, etc. Confirmation becomes easy.

Embodiment 3 FIG. FIG. 5 shows a circuit configuration of a control device for a ventilating apparatus according to another embodiment of the present invention. The same parts as those in the first embodiment or the second embodiment use the same reference numerals and the same reference numerals in FIG. 5, and a detailed description thereof will be omitted.

As shown in FIG. 5, the ventilator includes resistors 8, 9 and diodes 28, 2 serving as intermediate voltage generating means 10 connected between a power input terminal X and a power input terminal Z.
9 to the intermediate voltage generated by the variable resistor 2
7, the absolute value of the bidirectional current signal flowing out of or flowing into the control signal input terminal Y connected to the power supply input terminal X or the power supply input terminal Z via the absolute value means 40 and then input to the current-voltage conversion means 41 It is something to do.

The absolute value means 40 for obtaining an absolute value is composed of transistors 42 and 43 and a transistor 44 and a diode 45 forming a current mirror, and the current-voltage conversion means 41 comprises a diode 46, a resistor 47 and a capacitor 48.
It consists of. Other configurations are the same as those of the second embodiment shown in FIG.

Also in the ventilator having the above configuration, when the power switch 3 is off, the motor 21 is stopped as in the first and second embodiments. When the power switch 3 is turned on, a path from the power input terminal X to the variable resistor 27, the control signal input terminal Y, the resistor 5, the transistor 43, the diode 46, and the resistor 47 in the positive half cycle of the AC power source 1. Causes a current to flow, and a voltage is generated across the resistor 47.
The capacitor 48 is charged. Here, the transistor 43
Performs a grounded base amplification operation. On the other hand, in the negative half cycle of the AC power supply 1, the diodes 28 and 29 and the diode 46
No current flows because a reverse voltage is applied to. However, a DC control voltage is supplied to the voltage comparator 35 by the electric charge stored in the capacitor 48 during the positive half cycle. The subsequent operation is the same as the operation of the second embodiment.

Considering the case where the variable resistor 27 is connected between the control signal input terminal Y and the power supply input terminal X shown in FIG. Is in the ON state, a current flows from the power supply input terminal X to the diode 28, the diode 45, the collector to the emitter of the transistor 42, the resistor 5, the control signal input terminal Y, the variable resistor 27, and the power supply input terminal Z. Therefore, approximately the same amount of current as the current flowing through the diode 45 flows from the emitter of the transistor 44 to the collector, the diode 46, and the resistor 47, a voltage is generated across the resistor 47, and the capacitor 48 is charged. Therefore, the voltage at both ends of the resistor 47 can be controlled by changing the resistance value of the variable resistor 27 in the same manner as when the variable resistor 27 is connected to the position shown in FIG.

This means that there is no need to distinguish between the power input terminals X and Z as in the first and second embodiments. Therefore, the number of combinations that cause erroneous connection is reduced accordingly. If either the power input terminal X or the power input terminal Z is connected incorrectly,
Since the motor 21 does not move at all, it can be easily found that the connection is incorrect. If the power switch 3 is turned on and the light emitting diode 24 does not light up, it can be determined that all connections are erroneous, and if the operating state cannot be easily determined based on the installation position, noise, etc. Since the operation state can be confirmed by turning off the light, it is easy to confirm the incorrect connection. However, in this embodiment, the resistors 8 and 9 of the intermediate voltage generating means 10 are used.
Is almost the same even if the resistance value of the variable resistor 27 changes or the connected terminal changes, so that there is a feature that accurate control can be performed on the value of the variable resistor 27.

Embodiment 4 FIG. FIG. 6 shows a circuit configuration of a control device for a ventilating apparatus according to another embodiment of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals and are denoted by the same reference numerals in FIG. 6, and detailed description thereof will be omitted.

In FIG. 6, a control signal input terminal Y is connected between a power input terminal X and a power input terminal Z via a resistance value switching means 49. The resistance value switching means 49 is composed of two control switches 50 and 51 connected in parallel and resistors 52 and 53 respectively connected thereto. The control signal input terminal Y is connected to a resistor 5 and a diode 6 as current direction limiting means, and is connected to a resistor 7 as current / voltage converting means. Between the power input terminals X and Z, a voltage generating means 54 for generating a voltage that is not higher than the voltage of the lower one of the power input terminals X and Z by a certain voltage or more is connected. It is input to a resistor 7 as a means.

As shown in FIG. 6, the voltage generating means 54 comprises resistors 55 and 56, diodes 57 and 58, and Zener diodes 59 and 60, and generates voltages a and b at its output point R in FIG. I do. A capacitor 1 as a voltage holding means is provided at both ends of a resistor 7 as a current-voltage converting means.
1 is connected, and the output voltage of the resistor 7 is held in the capacitor 11. Voltage shift means 12 is connected to the capacitor 11 to shift the voltage held in the capacitor 11. The voltage shift means 12 includes a resistor 13 connected in series,
The control unit includes a transistor 14 and a resistor 15 and shifts the voltage held in the capacitor 11 to a control voltage with respect to a reference voltage of the control unit. The control voltage thus obtained is input to the control means 61. The control means 61 controls the relay coil 19 according to the magnitude of the control voltage. In this embodiment, a relay coil 63 for controlling a damper solenoid 62 for operating a damper for switching the air path is also provided, and the relay contact 64 is connected in series to the damper solenoid 62. Other configurations are the same as those of the first embodiment,
Description is omitted. In FIG. 7, the solid line a indicates the voltage at the output point R with respect to the power input terminal Z, and the solid line b indicates the voltage at the output point R with respect to the power input terminal X. Vz is the Zener voltage of the Zener diodes 59 and 60.

Also in the ventilator having the above-described configuration, when the power switch 3 is in the off state, the motor 21 is stopped as in the first and second embodiments, and the damper solenoid 62 is turned off.
Are also inactive. When the power switch 3 is turned on, the voltage at the output point R of the voltage generating means 54 is turned off in the negative half cycle of the AC power supply 1, and the diode 58 is turned off. ,
A current flows through a path extending to the diode 57 and the power input terminal X, and the voltage at the output point R with respect to the power input terminal X is equal to the Zener voltage V of the Zener diode 60 as shown in FIG.
It is limited so as not to be higher than z. In the positive half cycle of the AC power supply 1, the diode 57 is turned off,
Power supply terminal X to resistor 55, Zener diode 6
0, a diode 58, and a current flows through a path extending to the power input terminal Z, and the voltage at the output point R with respect to the power input terminal Z is limited so as not to become higher than the Zener voltage Vz of the Zener diode 60 as shown in FIG. Is done.

In the negative half cycle of the AC power supply 1, the voltage at the power supply input terminal X becomes lower than the voltage at the output point R of the voltage generating means 54, so that a forward voltage is applied to the diode 6,
A current flows from the output point R to the power input terminal X through the resistor 7, the diode 6, the resistor 5, and the control signal input terminal Y, and through the resistance value switching means 49. Therefore, the control switches 50, 5
The current flowing through the resistor 7 changes according to the combination of ON / OFF of 1, and the voltage generated across the resistor 7 also changes. The capacitor 11 is charged with the voltage across the resistor 7. Note that even when the voltage of the AC power supply 1 fluctuates greatly, the change in the voltage difference between the output point R and the power supply input terminal X, which is limited by the Zener diode 59, is small. The voltage across the resistor 7 hardly changes. In the case of this negative half cycle, the voltage at the output point R is lower than the voltage at the power supply input terminal Z, so that the diode 16
No current flows through.

When the AC power supply 1 is in the positive half cycle, the voltage at the power supply input terminal X becomes higher than the voltage at the output point R of the voltage generating means 54, and a reverse voltage is applied to the diode 6, so that the current flows through the resistor 7. Does not flow. However, capacitor 1
1 holds the charge stored during the negative half cycle. Since the voltage at the output point R is higher than the voltage at the power input terminal Z, a current substantially proportional to the voltage of the capacitor 11 is supplied from the output point R to the resistor 13, the transistor 14, the diode 1
6. The current flows through a path that reaches the power input terminal Z through the resistor 15. As a result, a voltage is generated across the resistor 15 and the capacitor 17 is charged, and at the same time, is input to the control means 61 as a control voltage. This control voltage is applied to the control switch 5
It changes according to the resistance value determined by the combination of the resistors 52 and 53 that are switched by ON / OFF of 0 and 51. Further, since the voltage generated at both ends of the resistor 7 is hardly affected by the voltage change of the AC power supply 1, a control voltage is obtained as an input of the control means 61 which is hardly affected by the voltage change of the AC power supply 1.

The control means 61 operates to control the relay coils 19 and 63 according to the control voltage as shown in FIG. Therefore, in this embodiment, the control switch 50 is turned on / off.
When the motor 21 is turned off, the strong / weak operation is switched, and when the control switch 51 is turned on / off, the damper solenoid 62 can be controlled.

Considering the case where the resistance value switching means 49 is connected between the control signal input terminal Y and the power supply input terminal X shown in FIG. In the negative half cycle of the AC power supply 1 with the switch 3 turned on, a reverse voltage is applied to the diode 6 so that no current flows through the resistor 7 and no voltage is generated across the resistor 7. In the positive half cycle of the AC power supply 1, the resistor 55, the output point R, the resistor 7, the diode 6, the resistor 5,
A current flows through a path that passes through the control signal input terminal Y and reaches the power input terminal Z via the resistance value switching means 49. Therefore,
The current flowing through the resistor 7 changes according to the on / off combination of the control switches 50 and 51, and the voltage generated across the resistor 7 also changes. This voltage charges the capacitor 11 at the same time.

Since the voltage at the output point R is higher than the power supply input terminal Z, a current substantially proportional to the voltage of the capacitor 11 is supplied from the output point R to the resistor 13, the transistor 14, the diode 1
6. A current flows through a path through the resistor 15 to the power input terminal Z. As a result, a voltage is generated across the resistor 15 and the capacitor 17 is charged. At the same time, the voltage is input to the control means 61 as a control voltage. In the negative half cycle of the AC power supply 1, a reverse voltage is applied to the diode 6 and the diode 16, so that no current flows through the resistor 7. Therefore, the voltage at both ends of the resistor 15 can be controlled by a combination of ON / OFF of the control switches 50 and 51 in the same manner as when the resistance switching means 49 is connected to the position shown in FIG.

This means that there is no need to distinguish between the power input terminals X and Z as in the first, second and third embodiments. Therefore, the number of combinations that cause erroneous connection is reduced accordingly. If either the power input terminal X or the power input terminal Z is incorrectly connected, the motor 21 does not move at all, and it is easy to find out that the connection is incorrect. If the power switch 3 is turned on and the light emitting diode 24 does not light up, it can be determined that all connections are erroneous, and if the operating state cannot be easily determined based on the installation position, noise, etc. Since the operation state can be confirmed by turning off the light, it is easy to confirm the incorrect connection.

When the voltage of the AC power supply 1 changes greatly, the change in the voltage difference between the output point R and the power supply input terminal Z limited by the Zener diode 60 is small. As a result, the control voltage is reduced. Hardly changes. That is, it is possible to obtain a control voltage which is hardly affected by the voltage change of the AC power supply 1.

In this embodiment, a voltage generating means 54 for generating a voltage which does not become higher than the voltage of the lower one of the power supply input terminals X and Z by a certain voltage or more is provided. The same function can be achieved by the configuration shown in FIG. That is, the power input terminal X,
Voltage generating means 5 for generating a voltage that is not lower than the voltage of the higher terminal of Z by a certain voltage or more.
4, the diode 6 may be arranged in the opposite direction to that of FIG. 6, the transistor 14 may be configured as an NPN type, and the protection diode 16 may be configured in the opposite direction.

It is also possible to obtain a control voltage for the control means 61 based on a voltage set separately from the power input terminals X and Z. Further, the circuit of the diode 6 as the current direction limiting means, the resistor 7 as the current-voltage converting means, and the capacitor 11 as the voltage holding means has a circuit shown in FIG.
Since the consumption of the charge once stored in the capacitor 11 by the resistor 7 is prevented by the diode 65, the voltage drop across the capacitor 11 can be prevented. Therefore, a voltage close to the peak value of the voltage generated at both ends of the resistor 7 is maintained, and the influence of the voltage fluctuation of the AC power supply 1 can be further suppressed.

The control switches 50 and 51 may not be independent or may be dependent, and the number thereof can be set arbitrarily according to the purpose, and can be constituted by a combination of switches and variable resistors. is there. Of course, the embodiments 1, 2, 3, and 4 can be applied not only to the ventilator but also to other devices that operate with a blower or other AC power supply and that control the operating state from the outside.

[0054]

As is apparent from the above description of the embodiment, according to the first aspect of the present invention, the control signal input terminal is connected to the first terminal.
The same function is achieved regardless of whether the power supply terminal is connected to either the power supply terminal or the second power supply terminal via a switch, a variable resistor, or a fixed resistor.
And the second power supply input terminal need not be distinguished,
The number of erroneous connection combinations can be reduced, the trouble of connection confirmation can be reduced, and accidents such as breakage due to erroneous connection can be prevented.

According to the second aspect of the present invention, the same function can be achieved even if the control signal input terminal is connected to either the first or second power supply input terminal via a switch or a variable resistor or a fixed resistor. Since it is not necessary to distinguish between the power supply terminal and the second power input terminal, the number of combinations that result in erroneous connections is reduced, the trouble of connection confirmation can be reduced, and accidents such as damage due to erroneous connections can be prevented beforehand. And the control can be continuously performed, so that the controllability from the outside is improved.

According to the third aspect of the present invention, the same function can be obtained even if the control signal input terminal is connected to either the first or second power supply input terminal via a switch, a variable resistor, or a fixed resistor. Since it is not necessary to distinguish between the power supply terminal and the second power input terminal, the number of combinations that cause incorrect connection is reduced, the trouble of connection confirmation can be reduced, and accidents such as damage due to incorrect connection can be prevented beforehand. In addition, since control can be performed continuously, controllability from the outside is improved.

According to the fourth aspect of the present invention, the same function can be achieved regardless of whether the control signal input terminal is connected to either the first or second power supply input terminal via a switch, a variable resistor, or a fixed resistor. Since it is not necessary to distinguish between the power supply terminal and the second power input terminal, the number of combinations that result in erroneous connections is reduced, the trouble of connection confirmation can be reduced, and accidents such as damage due to erroneous connections can be prevented beforehand. Not only can be
Different control items can be performed via a single control signal input terminal, and stable control can be performed even when the voltage of the AC power supply fluctuates.

According to the fifth aspect of the present invention, the same function is achieved even if the control signal input terminal is connected to either the first or second power supply input terminal via a switch, a variable resistor, or a fixed resistor. Since it is not necessary to distinguish between the power supply terminal and the second power input terminal, the number of combinations that result in erroneous connections is reduced, the trouble of connection confirmation can be reduced, and accidents such as damage due to erroneous connections can be prevented beforehand. Not only can be
Different control items can be performed via a single control signal input terminal, and stable control can be performed even when the voltage of the AC power supply fluctuates.

[Brief description of the drawings]

FIG. 1 is a circuit configuration diagram of a control device for a ventilating apparatus according to an embodiment of the present invention.

FIG. 2 is a circuit configuration diagram of a control device for a ventilating apparatus according to another embodiment of the present invention.

FIG. 3 is an explanatory diagram showing voltage waveforms during operation of the control device of the ventilating apparatus according to the embodiment of the present invention.

FIG. 4 is an explanatory diagram showing voltage waveforms during operation of the control device for the ventilator according to the embodiment of the present invention.

FIG. 5 is a circuit configuration diagram of a control device of a ventilating apparatus showing another embodiment of the present invention.

FIG. 6 is a circuit configuration diagram of a control device for a ventilating apparatus according to another embodiment of the present invention.

FIG. 7 is an explanatory diagram showing voltage waveforms during operation of the control device for the ventilator according to the embodiment of the present invention.

FIG. 8 is an explanatory diagram showing the operation of the ventilator of FIG. 6 in a table.

FIG. 9 is a circuit configuration diagram of a control device for a ventilating apparatus showing another embodiment of the present invention.

FIG. 10 is a partial circuit configuration diagram of a control device of a ventilating apparatus showing another embodiment of the present invention.

FIG. 11 is an explanatory diagram showing a circuit connection of a conventional ventilation device.

FIG. 12 is a circuit connection diagram of a conventional ventilation device.

FIG. 13 is a circuit connection diagram showing an example of an erroneous circuit connection of a conventional ventilation device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 AC power supply 3 Power switch 4 Control switch 6 Diode (current direction limiting means) 7 Resistance (current-voltage converting means) 10 Intermediate voltage generating means 12 Voltage shifting means 17 Capacitor 18 Transistor 19 Relay coil 21 Motor 27 Variable resistance 34 Bridge rectifying means 35 Voltage comparator 40 Absolute value means 41 Current-voltage conversion means 49 Resistance switching means 54 Voltage generation means 59 Zener diode 60 Zener diode X Power input terminal Y Control signal input terminal Z Power input terminal

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H02P 7/36 H02P 7/00 H02P 5/00

Claims (5)

(57) [Claims] 1. A first and second power input terminal for inputting AC power, a control signal input terminal for controlling an operation state of a ventilator, and a voltage substantially intermediate between the power input terminal. Intermediate voltage generating means, and current direction limiting means for limiting the direction of current flowing to the control signal input terminal,
A current-to-voltage conversion means for inputting a current signal flowing between the current direction restriction means and the intermediate voltage generation means and converting the current signal into a voltage signal; a voltage holding means for holding an output voltage of the current-voltage conversion means; Voltage shift means for shifting the output voltage of the voltage holding means, wherein the control signal input terminal is connected to one of the first and second power supply input terminals via a switch, a variable resistor, or a fixed resistor. And a control device configured to similarly control the operation state of the ventilator. 2. A power supply system comprising: a first and a second power supply input terminals for inputting AC power; a control signal input terminal for controlling an operation state of the ventilator; and a voltage substantially intermediate between the power supply input terminals. Intermediate voltage generating means, and current direction limiting means for limiting the direction of current flowing to the control signal input terminal,
A bridge rectifier for bidirectionally rectifying a current signal flowing between the current direction limiter and the intermediate voltage generator, and a current-voltage converter for inputting a rectified output current of the bridge rectifier and converting the rectified output current into a voltage signal And a voltage shifting means for shifting the output voltage of the current / voltage converting means, wherein the control signal input terminal is connected to either the first or second power supply input terminal via a switch or a variable resistor or a fixed resistor. A ventilator, comprising: a control device configured to similarly control an operation state of the ventilator when connected. 3. A first power supply input terminal for inputting an AC power supply, a second power supply input terminal, a control signal input terminal for controlling an operation state of the ventilator, and a voltage substantially intermediate between the power supply input terminals. Intermediate voltage generating means, absolute value means for taking an absolute value of a bidirectional current signal flowing out or flowing in from the control signal input terminal with respect to a voltage generated by the intermediate voltage generating means, and inputting the current signal Current-to-voltage conversion means for converting the control signal input terminal to a voltage signal, wherein the control signal input terminal is connected to either the first or second power supply input terminal via a switch or a variable resistor or a fixed resistor. A ventilator, comprising: a control device configured to similarly control the operation state of the ventilator. 4. A lower one of a first and second power supply input terminals for inputting an AC power supply, a control signal input terminal for controlling an operation state of the ventilator, and the power supply input terminal. Voltage generating means for generating a voltage that does not become higher than a terminal voltage by more than a certain voltage, current direction limiting means for limiting the direction of current flowing to the control signal input terminal, current direction limiting means and the voltage generating means Current-voltage conversion means for inputting a current signal flowing between the current-voltage conversion means and a voltage signal, a voltage holding means for holding an output voltage of the current-voltage conversion means, and a voltage for shifting the output voltage of the voltage holding means. Operating means of the ventilator when the control signal input terminal is connected to either the first or second power supply input terminal via a switch or a variable resistor or a fixed resistor. A ventilator comprising a control device configured to be similarly controlled. 5. The higher of the first and second power input terminals for inputting AC power, the control signal input terminal for controlling the operation state of the ventilator, and the power input terminal. Voltage generating means for generating a voltage that does not become lower than a terminal voltage by more than a certain voltage, current direction limiting means for limiting the direction of current flowing to the control signal input terminal, current direction limiting means and the voltage generating means Current-voltage conversion means for inputting a current signal flowing between the current-voltage conversion means and a voltage signal, and voltage shift means for voltage-shifting the output voltage of the current-voltage conversion means, wherein the control signal input terminal is A control device configured to control the operation state of the ventilator in the same manner when connected to either the first or second power input terminal via a switch or a variable resistor or a fixed resistor. The ventilation device characterized by the above.