KR20120110608A - Auto ventilation damper - Google Patents

Abstract

PURPOSE: An automatic ventilation damper is provided to open and close an opening and closing plate by immediately powering a drive motor using a battery. CONSTITUTION: An automatic ventilation damper comprises an exhaust duct, a rotary shaft, an opening and closing plate, a drive motor, and a controller. The rotary shaft crosses the exhaust duct. The opening and closing plate is coupled to the rotary shaft and opens and closes the flow path of the exhaust duct. The drive motor rotates the rotary shaft. The controller controls the drive motor. The controller comprises a constant voltage part(120), a battery(60), and a micom. The constant voltage part converts external power into constant voltage and opens the flow path of the exhaust duct. The battery closes the flow path of the exhaust duct by supplying charging power to the drive motor. The micom controls the charging of the battery.

Description

Auto ventilation damper

The present invention relates to an exhaust damper that maintains a comfortable environment by quickly discharging odor or contaminated air generated in a living room, kitchen, bathroom, etc., more specifically, when an external power source is applied, the exhaust duct is immediately operated. It prevents the life of the battery supplying the power to open and close the exhaust duct when the external power is cut off, to prevent unnecessary power consumption of the battery, and foreign matter is attached to the inside of the exhaust duct, so that the load on the rotation of the switchboard Automatic exhaust damper prevents the exhaust duct from being incompletely closed due to lack of rotation torque by increasing the output of the driving motor when it is caught, and prevents shortened life due to intensive wear of only one surface of the sealing member that is in close contact with the exhaust duct inner surface. It is about.

As is well known, an exhaust damper is a device that removes odor by forcibly discharging muddy indoor air to the outside, and maintains a comfortable indoor environment by removing contaminated air. When the lighting device of the bathroom or the range of the hood hood of the kitchen is operated in conjunction with this is driven together.

In general, an exhaust damper includes a pipe-type exhaust duct that provides a flow path of air, a rotation shaft traversing the exhaust duct, an opening and closing plate coupled to the rotation shaft to open or close an inner channel of the exhaust duct, and an outside of the exhaust duct. It includes a drive motor coupled to the exposed rotating shaft to rotate the rotating shaft, and a controller for controlling the drive of the drive motor.

When the switch for driving the lighting device of the bathroom, the lamp of the kitchen, or the switch for driving the exhaust damper alone is turned on, the exhaust damper is supplied with an external power source (usually a commercial AC power supply) and the driving motor rotates forward (or Reverse rotation) to open and close the exhaust duct by rotating the switchboard, and when the switch is turned off to cut off the supply of external power, the drive motor rotates forward (or reverse) to open the exhaust duct. In this case, when the supply of external power is cut off, the power for driving the driving motor uses a power discharged by a charging device charged with external power before the external power is blocked.

As a prior art related to the exhaust damper, see Utility Model Model No. 0357345 " System Damper " shown in FIG.

External power, that is, commercial AC power is stepped down through the transformer, the stepped down power is full-wave rectified through the bridge diode 32, the rectified power is smoothed in the electrolytic capacitor 33, discharged in the electrolytic capacitor 33 The power is converted into a constant voltage through the constant voltage IC (34) is supplied to the motor (M) to drive the motor to open the exhaust duct, the output constant voltage of the constant voltage IC (34) is a supercapacitor (37) through the SCR (36) ) And the supply of external power is cut off, the power charged in the supercapacitor 37 is discharged so that the motor (M) is driven to close the exhaust duct.

The conventional technique shown in FIG. 1 uses a general transformer and a supercapacitor 37. Since the input voltage is reduced due to the introduction of a large current during initial charging of the supercapacitor 37, the motor is not operated during charging and is operated after the charging is completed. Becomes

Therefore, the motor is not driven immediately after the external power is input, there is a problem that the motor is driven after about 5 seconds to 8 seconds.

In addition, an exhaust fan is provided in front of the opening and closing plate of the exhaust duct for quick and smooth discharge of indoor air, and the exhaust fan is generally operated immediately when external power is input.

However, if the motor is not driven immediately after the external power is input as described above, the opening and closing plate is opened after the exhaust fan is started.In this case, the load is increased at the opening and closing of the opening and closing plate due to the blowing of the exhaust fan. There is a problem that arises.

And the charge and discharge life of the supercapacitor is about 100,000 times at room temperature, there is a problem that the number of 60-degree life is sharply reduced when the ambient temperature rises. Above 60 degrees, life is reduced by about 2,000 times.

Therefore, the super condenser disposed adjacent to the motor having high heat generation is exposed to high temperature, and the exhaust damper is frequently used, and the super capacitor, which is charged and discharged every time the exhaust damper is used, does not have a long life. there is a problem.

And supercapacitors have a large but limited capacity compared to other capacitors.

Therefore, when foreign matter is attached to the inner surface of the exhaust duct and there is a load that disturbs the rotation of the switchboard, all the power charged in the supercapacitor is discharged before closing the exhaust duct completely. There is a problem that the output can not be supplied to the motor. That is, a situation in which the rotating plate is not completely closed due to the lack of charging power of the supercapacitor.

In addition, the conventional technology uses expensive constant voltage IC and SCR, the manufacturing cost is increased, the price competitiveness is weak,

The relay is used for the forward and reverse rotation of the motor. The relay frequently operates in a contact manner, and there is a problem of frequent malfunction due to a defective contact.

The limit switch is used to detect the forward and reverse positions of the motor. The limit switch is worn by contact due to repeated forward and reverse rotations, and there is a risk of false detection due to poor connection in long term use.

And the outer periphery of the edge of the opening and closing plate is provided with a close contact member (usually rubber or silicone packing) in close contact with the inner surface of the exhaust duct, the opening and closing plate is 90 degrees to reduce the energy consumption due to unnecessary rotation by minimizing the reverse rotation range Normal and reverse rotation is common.

 However, when the forward rotation and the reverse rotation of 90 degrees, only one surface of the contact member provided in the opening and closing plate contacts the exhaust duct inner surface. That is, if the clockwise rotation rotates forward 90 degrees clockwise and then rotates counterclockwise backward 90 degrees, the right side sealing member of the rotating shaft is worn out by contacting the inner surface of the exhaust duct intensively only, and the outer sealing member of the rotating shaft is Only the lower surface is concentrated and in contact with the inner surface of the exhaust duct wear.

Therefore, only one surface is intensively contact-weared, and the replacement time of the sealing member or the opening / closing plate to which the sealing member is coupled is drawn.

The present invention has been made to solve the problem of the exhaust damper according to the prior art as described above, by using a battery, that is, a secondary battery as a charging unit for supplying power for closing the opening and closing plate after the external power is cut off, By eliminating the need for a large current for the initial charging of the battery, the external power input is immediately supplied to the motor, so that the exhaust exhaust duct can be opened quickly. The increase and the occurrence of the noise are prevented,

Only the discharge is continuously performed until the charging voltage of the battery reaches the lower limit. After reaching the lower limit, the battery is charged until the charging voltage reaches the upper limit (that is, full) whenever an external power source is input. In spite of the number of times the exhaust damper is repeatedly operated and stopped, the service life according to the number of charge / discharge cycles of the battery is reduced.

After the supply of external power is cut off and the switchboard is closed, the output line of the battery is opened, and the supply of driving power to the microcomputer is also cut off to prevent the discharge of the charging power of the battery according to the standby power. Prolong the service life,

When the switch is closed, it supplies a low output voltage to the drive motor to reduce the discharge of the battery while allowing the switch to rotate slowly to reduce noise.If foreign matter is attached to the exhaust duct, the drive motor is supplied with a high output voltage. Full closure of the plate is possible,

The opening and closing plate aims to provide an automatic exhaust damper that extends the service life by allowing the both sides of the sealing member to be contacted and worn evenly by forward rotation after forward rotation based on 180 degrees.

In addition, components can be simplified and cheaper to minimize manufacturing costs,

It is another object of the present invention to provide an automatic exhaust damper that uses a non-contact, contactless type to detect and detect malfunctions due to poor connection and shorten the life due to contact wear.

Automatic exhaust damper according to the present invention for achieving the above object is

An exhaust duct, a rotating shaft crossing the exhaust duct, an opening and closing plate coupled to the rotating shaft to open and close the flow path of the exhaust duct, a driving motor for rotating the rotating shaft, and a controller for controlling the driving motor. In the exhaust damper,

The controller

A constant voltage unit converting an input external power supply into a constant voltage and supplying it to the driving motor to open a flow path of the exhaust duct;

A battery which is charged with output power of the constant voltage unit and supplies charging power to the driving motor to close the flow path of the exhaust duct when the input of external power is cut off;

It includes a microcomputer for controlling the discharge of the battery by detecting the input of an external power source, and controlling the charge of the battery by detecting the charge voltage of the battery,

The microcomputer cuts off the charge until the charge voltage of the battery reaches the lower limit due to repetitive discharge, thereby maximizing the life due to the charge and discharge of the battery.

And the controller is an opening and closing detection unit for detecting the opening and closing of the opening and closing plate according to the rotation state of the rotary shaft;

Further comprising a switching unit provided in the output line of the battery,

The microcomputer is characterized in that the switching to open the switching unit after a predetermined time to block the discharge according to the standby power when the signal is closed in the opening and closing plate in the opening and closing detection unit,

The controller further includes a forward and reverse driver for supplying to the drive motor by alternating the output voltage polarity of the constant voltage unit under the control of the microcomputer, so that the opening and closing plate rotates forward or reverse.

The microcomputer is to be quickly opened by the high output voltage is supplied to the drive motor when the opening and closing plate is opened, and to be closed slowly by supplying a low output voltage to the drive motor when closing, but completely closed within the reference time When the closing is not completed, it characterized in that the high output voltage is supplied to the drive motor,

The outer periphery of the opening and closing plate is provided with a sealing member having an outer diameter longer than the inner diameter of the exhaust duct,

The micom is characterized in that to prevent the biased wear of one side of the sealing member by causing the opening and closing plate to rotate in reverse after the forward rotation based on 180 degrees.

The automatic exhaust damper according to the present invention having the configuration as described above uses a secondary battery (battery) as a charging unit for supplying power for driving the driving motor after the external power is cut off, so an initial charging large current is not required at the time of external power supply. The drive motor is immediately driven to open the opening and closing plate, thereby reducing the load increase and the occurrence of noise due to the blowing of the exhaust fan.

Before the battery reaches the lower limit of the charging voltage range, the battery only discharges even when the exhaust damper is operated at any time, thereby minimizing the shortening of the life according to the number of charge / discharge cycles of the battery.

After closing the switchboard, the minimum power supply to the microcomputer is also turned off, and the output line of the battery is opened, thereby minimizing the discharge due to standby power consumption, which saves energy and extends the battery life.

If the switchboard is not completely closed within a certain period of time when the switchboard is closed, a high output voltage is supplied to the drive motor to ensure that the switchboard is completely closed, and supply sufficient power to the drive motor. Supplying a battery having a charging power capacity prevents incomplete closure of the switchboard due to lack of power,

The opening and closing plate is rotated forward and backward based on 180 degrees, so that both sides of the sealing member provided on the outer periphery of the opening and closing plate alternately contact the inner surface of the exhaust duct so as to be worn evenly, thereby extending the service life.

Furthermore, manufacturing cost is low by minimizing the use of expensive electronic devices such as constant voltage IC and SCR, and non-contact and contactless electronic devices are used as electronic devices for various sensing and detection, thereby resulting in malfunction or contact due to poor connection. The present invention relates to an automatic exhaust damper that prevents shortening of life due to wear, and is a very useful invention for industrial development.

1 is a perspective view of an automatic exhaust damper according to the present invention.
Figure 2 is a perspective view showing a closed and open state of the opening and closing plate in the automatic exhaust damper according to the present invention.
3 is a circuit diagram of a controller of an automatic exhaust damper according to the present invention.

Hereinafter, the automatic exhaust damper according to the present invention will be described in more detail with reference to FIGS. 1 to 3.

As shown in the figure, the automatic exhaust damper according to the present invention is a major component of the exhaust duct 10, the rotating shaft 20, the opening and closing plate 30, the sealing member 40, the drive motor 50 and the controller 100 It is made, including.

The exhaust duct 10 has a circular pipe shape and provides a flow path 11 through which air flows. That is, it provides a path for discharging indoor air to the outdoors.

The rotary shaft 20 is coupled through the exhaust duct 10, coupled to the shaft of the drive motor 50 is rotated forward and backward according to the drive of the drive motor.

The opening and closing plate 30 is coupled to the rotation shaft 20 in the exhaust duct 10, and opens or closes the internal flow path 11 of the exhaust duct 10 according to the forward and reverse rotation of the rotation shaft 20. .

The sealing member 40 is coupled to the outer periphery of the opening and closing plate 30, and close to the inner surface of the exhaust duct when the exhaust duct 10, 11 is closed to seal and close the flow path 11 to the outdoor air Prevent backflow into the room.

The diameter of the opening and closing plate 30 is shorter than the inner diameter of the exhaust duct 10, the diameter of the sealing member 40 is longer than the inner diameter of the exhaust duct 10. And the sealing member 40 is made of a soft soft rubber or silicon material.

Thus, the sealing member 40 closes the flow path more closely by folding the edge when the flow path 11 is closed and making a surface contact with the inner surface of the exhaust duct 10.

In the related art, when the exhaust duct flow path 11 is opened and closed, the opening and closing plate 30 is generally minimized in order to minimize the rotation range of the opening and closing plate 30 so that the driving motor 50 is unnecessarily driven to consume energy. A 90 degree forward rotation is used to open the flow path, and a 90 degree reverse rotation is used to close the flow path.

However, as in the prior art, when the opening and closing plate 30 rotates about 90 degrees, the sealing member 40 continuously maintains only one of the upper surface and the other of the lower surface of the exhaust duct 10. Is in contact with.

Then, the sealing member 40 is intensively worn only the contact surface is reduced in life, and also continues to be folded in the contact direction by the weakening of the restoring force to the original state unfolded to maintain the folded state, which is closed You will lose your ability.

Therefore, it is necessary to minimize the driving of the driving motor 50 for opening and closing while reducing only one surface of the sealing member 40 to be concentrated on the inner surface of the exhaust duct 10, thereby reducing energy consumption.

Due to such a necessity, the present invention allows the opening and closing plate 30 to perform reverse rotation after forward rotation based on 180 degrees. In other words, on the basis of the state in which the open / close board 30 is opened, the open / close board 30 is rotated forward by 90 degrees to close the flow passage 11, and again rotates forward by 90 degrees to open the flow passage 11 again. The flow path 11 was closed by reverse rotation by 90 degrees, and the flow path 11 was opened by reverse rotation by 90 degrees.

Thus, when the opening and closing of the flow path 11, the sealing member 40 alternately contacts one surface and the other surface with the inner surface of the exhaust duct 40, so that both surfaces are evenly worn, and the sealing member 40 is alternately folded in both directions. Since the restoring force is weakened to prevent the folded state from being maintained, and the opening and closing of the flow path 11 respectively open and close the opening and closing plate 30 by 90 degrees, the driving of the motor 50 is also minimized. It can solve the problem.

The drive motor 50 is installed on one end of the rotating shaft 20 exposed to the outside of the exhaust duct 10, and performs the forward and reverse rotation under the control of the controller 100.

In addition, the motor shaft of the drive motor 50 and the rotation shaft 20 are coupled by the storage member (70). Stepped portions 51 and 21 are formed at ends of the motor shaft and the rotating shaft, respectively, and stepped holes 71 having shapes corresponding to the stepped portions 51 and 21 are formed at both sides of the storage member 70. As a result, the accumulating member 70 accumulates the motor shaft 51 and the rotating shaft 20 inserted into both sides.

And the outer periphery of the storage member 70 is coupled to the ring-shaped magnet 80 for detecting the opening and closing state of the opening and closing plate 30.

The magnets 580 are divided into four and arranged in the order of N pole, S pole, N pole, and S pole, respectively.

The hall sensor 90 is disposed adjacent to the magnet 80. The hall sensor 90 detects a change in polarity according to the rotation of the magnet 80 and transmits it to the microcomputer U5 of the controller 100.

For reference, the hall sensor 90 detects a polarity change of the magnet 80 as a latch type. That is, at each polarity, the same sensing signal (eg, Hi signal) is output regardless of the strength of the magnetic force, and when the polarity is changed, another sensing signal (eg, Low signal) is output. Thus, whether the rotating shaft 20 has completed 90 degrees forward and reverse rotation is detected and transmitted to the microcomputer (U5).

The controller 100 controls the driving of the driving motor 50, that is, the reverse rotation, so that the opening and closing plate 30 opens and closes the exhaust duct flow path 11.

The controller 100 includes a constant voltage unit 120, a battery 60 (BT1 to BT4), a microcomputer U5, an open / close detection unit 190, a switching unit 140, and a forward / reverse driving unit 170. A more specific circuit diagram is shown in FIG.

Hereinafter, the controller 100 according to the present invention will be described in more detail with reference to FIG. 3.

A fuse F is connected to an input side of the controller 100 to which an external power source (usually a commercial AC power source) is input and is cut off when an overcurrent is applied to the external power source to protect the controller 100.

As the fuse F, it may be desirable to reduce manufacturing costs by using a pattern fuse connected to a line pattern of a PCB by a printing method.

The fuse F is connected in series to a thermistor resistor RT1. The thermistor resistor RT1 is a device whose resistance value varies with temperature, and blocks inrush current (eg, surge) from an input external power source.

The thermistor resistor (RT1) is connected to the bridge diode (V1) for full-wave rectification of the input external power.

A smoothing unit 110 is connected to the output side of the bridge diode V1 to smooth the rectified external power and remove noise.

The smoothing unit 110 includes an inductor L1, two capacitors C2 and C3, and a resistor R1.

The output side of the smoothing unit 110 is connected to a constant voltage unit 120 for stepping down and smoothing the smoothed external power.

The constant voltage unit 120 is a pulse generation unit (U1) for switching the smoothed external power to a pulse type AC power source, and

A transformer T1 for stepping down the pulsed AC power generated by the pulse generator U1;

A capacitor C6 for smoothing the output power of the transformer T1 to direct current, and

A shunt regulator U3 connected in parallel with the capacitor C6 to maintain a constant voltage level at the capacitor C6 and output a constant voltage;

The resistor R6 sensing the output voltage of the transformer T1 and the output voltage sensed by the resistor R6 are fed back to the pulse generator U1 to maintain a constant output voltage magnitude of the transformer T1. It is made to include a photo coupler (U4).

The transformer T1 is further provided with one winding on the primary side and the secondary side, respectively, and the winding of the added transformer T1 is connected to an external power supply detecting unit. The external power detecting unit 180 is composed of a resistor (R24) and a capacitor (C11) when the power is input from the winding added to the transformer (T1), that is, the external power is input to the microcomputer (U5) is transmitted. do.

On the output side of the constant voltage unit 120 may be provided with a booster 150 for boosting the voltage of the constant voltage external power.

The booster 150 is selective according to the magnitude of the driving voltage of the driving motor 50. In other words, the driving motor 50 mainly uses 5V and 12V as driving voltages. Thus, the booster 150 is unnecessary when the 5V driving motor is used, and the booster 150 is required when the 12V driving motor is used.

The booster 150 includes an inductor L2 for boosting voltage, and a transistor Q4 for turning on and off to change the magnetic flux of the inductor L2 to be boosted. The on / off of the transistor Q4 is controlled by the microcomputer U5.

On the output side of the booster 150, a diode D2 for rectifying the boosted external power (constant voltage at the constant voltage unit when the booster is not provided) and the external power rectified by the diode D2 are smoothed. Capacitor C4 for direct current supplying to the forward and backward driver 170 and the output voltages of the capacitor C4 are detected by voltage division, and the sensing resistors R3 and R13 are transmitted to the microcomputer U5. do.

A driving power source 160 for supplying driving power to the microcomputer U5 is connected to the capacitor C4 for supplying power to the forward and backward driving unit 170.

The driving power supply unit 160 steps down the output power of the capacitor C4, smoothes and directs the voltage, and constant-voltages the transistor Q1, the capacitor C1, the shunt regulator U2, and the diode D4. ) And resistors R2, R4, and R14.

The forward and backward driving unit 170 is a capacitor (C10) is supplied with a driving power for driving the drive motor 50,

A first transistor Q8 connected in parallel to each of the capacitors 10 and respectively connected to one of the two power terminals of the driving motor 50 to input driving power of the capacitor 10 to the driving motor; And the second transistor Q9,

The first transistor Q8 and the second transistor Q9 connected to any one of the two power terminals of the driving motor 50 and connected to the power terminal opposite to the driving motor 50, respectively. And a third transistor Q10 and a fourth transistor Q11 respectively connected to the base end.

The third transistor Q10 and the fourth transistor Q11 are controlled on and off by the microcomputer U5, respectively, and stable to the first to fourth transistors Q8, 9, 10, and 11, respectively. A diode and a resistor for on and off are connected.

When the driving motor 50 performs the forward rotation, the third transistor Q10 is turned on by the control of the microcomputer U5, and when the third transistor Q10 is turned on, the second transistor Q9 is turned on. On, the DC power in the forward direction is supplied to the two power terminals of the drive motor 50,

When the driving motor 50 rotates in reverse, the fourth transistor Q11 is turned on under the control of the microcomputer U5, and when the fourth transistor Q11 is turned on, the first transistor Q8 is turned on. As a result, DC power in reverse direction is supplied to the two power terminals of the driving motor 50.

In addition, when the opening and closing plate 30 is opened, the high output voltage is supplied to the driving motor 50 so as to rapidly rotate. When closing the opening and closing plate 30, the low output voltage is supplied to the driving motor, thereby slowly rotating. Do it.

Rapid rotation during opening is to prevent the increase of load during opening process and to prevent the generation of noise. Even though this is blocked, the air is introduced by the fan rotating by inertia, so that the air is slowly closed at the time when the air is weakened to reduce the load in the closing process and prevent the occurrence of noise. In this case, the closing may be started after a certain time (for example, after 2 seconds) after the power is cut off to further reduce the adverse effect of the blowing.

And the opening and closing detection unit 190 for detecting the open or closed state of the opening and closing plate 30 is a magnet 80 provided in the storage member 70 for laying out the rotary shaft 20 and the motor shaft 51, and the Hall sensor 90 for detecting a polarity change according to the rotation of the magnet 80 (that is, rotation of the rotary shaft), and outputs a Hi or Low signal to the microcomputer U5 according to the polarity detected by the hall sensor 90 It comprises a hiro portion H1 for transmitting.

The batteries BT1 to BT4 are provided at the output side of the constant voltage unit 120, and discharge the charging power under the control of the microcomputer U5 when the external power is cut off, and supply them to the forward and backward driving unit 170. .

In addition, two distribution resistors R9 and R17 are connected to the batteries BT1 to BT4 in parallel to detect a charging voltage, and the charging voltages of the batteries BT1 to BT4 detected by the two distribution resistors are the microcomputer. Transmitted to U5. A transistor Q7 connected to the ground of the two distribution resistors R9 and R17 is controlled by the microcomputer U5. The transistor Q7 is turned off while the exhaust damper is not in use to prevent self discharge of the batteries BT1 to BT4.

The charging unit 130 and the switching unit 140 are connected to an input side and an output side of the batteries BT1 to BT4, respectively.

The charging unit 130 charges the batteries BT1 to BT4 at an output constant voltage of the constant voltage unit 120 when an external power source is input and when charging is required by the microcomputer U5.

The charging unit 130 supplies a transistor Q2 for supplying or blocking the output constant voltage of the constant voltage unit 120 to the batteries BT1 to BT4, and a resistor R7 for protecting the transistor Q2 to be stably driven. R10), a diode D6 for rectifying the input power to be supplied to the batteries BT1 to BT4, another on / off controlled by the microcomputer U5 and controlling on / off of the transistor Q2. Transistor Q5.

The switching unit 140 is turned on by the control of the microcomputer (U5) when the input of the external power is cut off the driving power to discharge the charging power of the battery (BT1 ~ BT4) to close the opening and closing plate 30 After supplying to the driving motor 50 and closing the closing plate 30 is completed (off) again to block the battery (BT1 ~ BT4) to discharge some of the charging power according to the standby power.

The switching unit 140 is turned on and off so that the transistor (Q3) for discharging or interrupting the charging power of the battery (BT1 ~ BT4), and the resistor (R8, R11) for driving the transistor (Q3) stably; And a diode (D7) for rectifying the discharged power, and another transistor (Q6) for controlling the on-off of the transistor (Q3) is controlled on and off by the microcomputer (U5).

The microcomputer U5 controls the controller 100 as a whole. In more detail, it is as follows.

Whether the external power is input through the external power detection unit 180 or whether the input of the external power is blocked or not, and whether the opening / closing plate 30 is opened through the opening / closing detection unit 190 or Receives a signal of whether or not closed, and receives the magnitude of the charge voltage of the battery through two distribution resistors (R9, R17) connected in parallel to the battery (BT1 ~ BT4),

Various information necessary for the operation of the exhaust damper, and various information about the previous operating state of the exhaust damper is stored in the memory.

The exhaust damper is operated according to a preset program using various information received in real time and various information stored in the memory.

An example of the operation method by the control of the microcomputer U5 is as follows.

First, when an external power source detects an input of the external power sensor 180, when the external power supply unit 180 operates immediately before the opening / closing plate 30 stored in the memory, the opening / closing plate is rotated forward or reversely in a direction corresponding to the rotational direction. The forward and backward driving unit 170 is controlled to open the flow passage 11 of the duct 10 to supply driving power to the driving motor 50.

And when the charging voltage of the batteries BT1 to BT4 sensed by the two distribution resistors R9 and R17 is not at the upper or lower limit of the charging power range, the battery at the time of immediately preceding operation stored in the memory. If it is being charged according to the information on whether the BT1 to BT4 are being charged, the charging unit is controlled to charge the battery BT1 to BT4, and if not, the charging is not performed.

When the charging voltage of the batteries BT1 to BT4 reaches the lower limit even during operation, the charging unit 130 is immediately controlled to be charged. Also, after the charging of the batteries BT1 to BT4 is full (that is, the charging voltage reaches the upper limit), the number of charges and discharges of the batteries BT1 to BT4 is prevented from being charged until the charging voltage reaches the lower limit. Minimize

As such, minimizing the number of charge / discharge cycles of the batteries BT1 to BT4 is to prevent the life of the battery from shortening due to charge and discharge as described above. The charge and discharge life of the battery is about 500 ~ 1,000 times, and the exhaust damper is operated frequently because of its operating characteristics.If the battery is charged and discharged every time, the exhaust damper, which is installed in the bathroom where it is used dozens of times a day, may be The battery has reached the end of its useful life and needs to be replaced.

Some batteries have a memory effect on the charging power, and the battery having the memory effect reduces the charging power that can be gradually discharged when the battery is charged even though there is a remaining charging power. It should be avoided.

When the signal from which the external power input from the external power detection unit 180 is cut off is transmitted, the switching unit 140 is turned on to discharge the charging power of the batteries BT1 to BT4. At this time, the discharge of the batteries BT1 to BT4 may be immediately performed when the external power is cut off, or may be performed after a predetermined time so that the blowing of the exhaust fan is weakened.

In addition, after discharging the charging power of the batteries BT1 to BT4, the forward / backward driving unit 170 is controlled to apply driving power to the driving motor 50, whereby the opening / closing plate 30 exhausts the exhaust duct 10. To close the flow path.

At this time, the rotation direction of the opening and closing plate 30 is reverse or forward rotation in a direction opposite to the direction rotated when opening the opening and closing plate stored in the memory, so that the opening and closing plate forward or reverse based on 180 degrees.

When the signal for the opening / closing completion of the opening / closing plate 30 from the opening / closing detection unit 190 is not transmitted within the time stored in the memory, it is determined that the opening / closing plate is caught by a foreign material and the like, thus preventing the rotation of the driving motor 50. By supplying a high output voltage to the closing plate 30 can be completed. When the closing of the opening and closing plate 30 is not completed within a predetermined time even though a high output voltage is applied, an emergency bell or a flashing lamp may be used to notify the user.

For reference, the high output voltage or the low output voltage of the driving power supplied to the driving motor 50 may control the on / off time of the third transistor Q10 or the fourth transistor Q11 of the forward / reverse driver 170. The duty ratio may be adjusted, and the on / off of the transistor Q6 of the booster 150 may be adjusted to adjust the size of the driving power supplied to the forward / reverse driver 170.

After the opening and closing of the opening and closing plate 30 is completed, after storing the charging voltage of the battery (BT1 ~ BT4), information on whether it is being charged, information on the rotation direction of the opening and closing plate 30 in the memory The transistor Q7 connected to the batteries BT1 to BT4 is turned off to block self-discharge of the battery, and the transistor Q3 connected to the battery output line through the transistor Q6 of the switching unit 140. By opening the power supply to the battery (BT1 ~ BT4) driving motor and the microcomputer (U5) cut off, and also the discharge according to the standby power for the minimum operation of these to prevent unnecessary power consumption of the battery.

In the above description of the present invention has been described with respect to the automatic exhaust damper having a specific shape and structure with reference to the accompanying drawings, the present invention can be variously modified and changed by those skilled in the art, such modifications and changes are the protection of the present invention Should be interpreted as being within the scope.

10: exhaust duct 20: rotating shaft
30: opening and closing plate 40: sealing member
50: drive motor 60: battery
70: storage member 80: magnet
90: Hall sensor 100: controller
110: smoothing unit 120: constant voltage unit
130: charging unit 140: switching unit
150: booster 160: drive power supply
170: forward and reverse driving unit 180: external power detection unit
190: opening and closing detection unit

Claims (4)

An exhaust duct, a rotating shaft crossing the exhaust duct, an opening and closing plate coupled to the rotating shaft to open and close the flow path of the exhaust duct, a driving motor for rotating the rotating shaft, and a controller for controlling the driving motor. In the exhaust damper,

The controller
A constant voltage unit converting an input external power supply into a constant voltage and supplying it to the driving motor to open a flow path of the exhaust duct;
A battery which is charged with output power of the constant voltage unit and supplies charging power to the driving motor to close the flow path of the exhaust duct when the input of external power is cut off;
It includes a microcomputer for controlling the discharge of the battery by detecting the input of an external power source, and controlling the charge of the battery by detecting the charge voltage of the battery,
The microcomputer stops charging until the charging voltage of the battery reaches the lower limit due to repetitive discharge, thereby maximizing the life due to the charging and discharging of the battery. The method of claim 1,
The controller includes an opening and closing detection unit for detecting the opening and closing of the opening and closing plate according to the rotation state of the rotary shaft;
Further comprising a switching unit provided in the output line of the battery,
The microcomputer is an automatic exhaust damper, characterized in that when the signal is closed in the opening and closing plate the exhaust duct is transmitted from the opening and closing detection unit, after the predetermined time elapses by opening the switching unit to block the discharge according to the standby power. The method according to claim 1 or 2,
The controller further includes a forward and reverse driver for supplying to the drive motor by alternating the output voltage polarity of the constant voltage unit under the control of the microcomputer, so that the opening and closing plate rotates forward or reverse.
The microcomputer is to be quickly opened by the high output voltage is supplied to the drive motor when the opening and closing plate is opened, and to be closed slowly by supplying a low output voltage to the drive motor when closing, but completely closed within the reference time When the closing is not completed, the automatic exhaust damper characterized in that the high output voltage is supplied to the drive motor. The method of claim 3, wherein
The outer periphery of the opening and closing plate is provided with a sealing member having an outer diameter longer than the inner diameter of the exhaust duct,
The microcomputer automatic exhaust damper, characterized in that for preventing the biased wear on one surface of the sealing member by the reverse rotation after the forward rotation of the opening and closing plate based on 180 degrees.

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