KR20030091845A - Fan Trouble Detection Device Fixing Air Pipe & Air Duct - Google Patents

Abstract

PURPOSE: An apparatus and a method for detecting a trouble of a fan are provided to prevent the blower from being damaged by detecting the error of the blower in an early stage. CONSTITUTION: A fan is coupled to an air pipe(1) or an air duct. A vane(3) having wings(5') of light weight is coupled to the air pipe(1) or the air duct(1') by means of a frame(4). A sensor detecting member(6) is attached to a center of the vane(3). A detecting sensor(7) is installed at the frame(4) in opposition to the sensor detecting member(6). The sensor detecting member(6) and the detecting sensor(7) form a sensor unit(12). A power feeding line and a signal transmitting line(8) are withdrawn from the sensor unit(12) and connected to a speedometer(9). A lamp(10) and a buzzer(11) are connected to an output terminal of the speedometer(9).

Description

Fan Trouble Detection Device Fixing Air Pipe & Air Duct}

The structure of the blower is a fixed wing (impeller) for moving the wind on the rotating shaft of the electric motor. Its failure is mainly caused by the poor insulation of the motor coil, the wear of the rotating medium composed of bearings or a large number of bead bearings, and once the blower has an error, the rotational force of the blades decreases and the speed decreases. This technique detects changes in the speed of the vanes and detects abnormalities in the blower. Conventionally, since the blower is driven by an electric motor, a device that cuts off the power by overheating it when the motor is overheated and a device that detects an increase in the induced current caused by the current transformer due to overload in case of motor failure, and cuts off the overcurrent with the thermal relay. There is a device.

In the conventional technology, detecting the failure of the blower by temperature is not effective because of the small temperature rise in small motors, and detecting the overcurrent detection by the current transformer is also detected by the induction current. Since it is only detected in ampere phase, if it is a 20-watt small blower, the current is usually 0.09 amp at 220 volts, but it cannot be detected assuming that a current of 0.45 amp, which is five times the abnormality, flows. Eventually, the blower must be deepened to reach insulation breakdown due to overheating, and suddenly increase the detection signal to more than 0.5 amps and several tens of amperes.In this case, the motor coil is already short-circuited and disconnected (melted and broken). Can be. This method is analogous to the human body, and the temperature sensor detection method can be said to check health by body temperature, and the overcurrent detection method by the current transformer can be said to check the health by the amount of blood flow, that is, the color. According to the analogy, the present invention corresponds to diagnosing the heart rate and pulse rate of a person's heart pulse in a forearm as in a clinic. When the blower is in a normal function, the rotational force is weakened and becomes slow when a slight abnormality occurs. Is made into a detection device. The primary idea was to use the blade of the blower as a detection agent for the sensor and to make the photosensor or proximity switch symmetrical to the detector as a detection sensor. However, the problem in this case is that the blower with the large blades has a large vibration, which shortens the sensor life. In addition, the maintenance of the blower causes the inconvenience of disassembling, and if it is dislodged due to vibration, it may cause the blower rotation failure. In addition, when a plurality of blowers address long sections of a tunnel at a proper interval in one ventilation pipe, such as Utility Model Registration No. 0270723 (Patent Application No. 2003-0018048), such a fault detection device must be installed every blower. It is inconvenient and economical.

Figure 1 (a) is a cross-sectional view of the implementation in the ventilation pipe (1) of the sensor unit 12 of the blower fault detection device using a fluttering wheel of the present invention.

Fig. 1 (b) is a front view 9 of the speedometer 9 having a " lower limit control output " function used in the present invention, a detail of the sensor unit 12, and an entry and exit line of the same unit 12 and the speedometer 9; Connection diagram of the back side terminal of) and alarm lamp (1), buzzer 11, and power supply

Figure 2 is an embodiment of the sensor unit of the present invention in combination with the ventilation duct (1 ')

<Explanation of symbols for main parts of drawing>

One. … Uptake 1 '... Gout duct

2. … Blower 3.. paper windmill

4. … Fixing Frame

5.… Wing 5 'of blower…. Rotating Blade

6.… Detector for sensor 7.. Detection sensor

8. … Power and output lines drawn from the detection sensor

9.… speedometer

9A. Numerical display for lower limit setting

9B. Rotational speed numerical display

10.… Indicator lamp 11.. Buzzer

12.… Fault detection sensor unit

13.…. Power display of speedometer and sensor unit

13 '... Power display of alarm circuit 13 "… power display of blower circuit

14.…. Intake air movement indicator

15.… Exhaust air movement indication 16. Concrete structure

18.… Outlet wire of blower motor

19…. Pipe connection fittings

20... Relay R R... B contact of relay

SW1... Operation switch SW2 of the blower; Power switch

The present invention is configured as follows by the accompanying drawings to solve these problems. Fixing the flange (3) using a light material (5 ') in the ventilation pipe (1) or the ventilation duct (1') coupled with the blower with a frame (4) and the flap (5 ') of the flutter (3) Attach the sensor 6 to the center of the sensor and fix the sensor 7 to the frame 4 at a symmetrical position. This is referred to as the sensor unit 12 for convenience of explanation. The sensor power supply line and the signal transmission line 8 drawn out from the sensor unit 12 are connected to the signal input side of the rear terminal block of the general-purpose speedometer 9 having a lower limit setting and a control output function. At the control output terminal of the speedometer 9, an alarm display lamp 10 and a buzzer 11 that emits an alarm sound are engaged with the power supply 13 '. Next, the power supply 13 supply line is connected to the power supply terminal of the speedometer 9 through the switch SW2.

Detailed description is as follows.

In the case of using the proximity sensor 7 as a proximity switch, the sensor detecting body 6 attached to the flutter is a thin metal plate, and the flutter is a nonmetallic material.

When the detection sensor 7 is a photosensor, the sensor detection body 6 becomes a thin reflecting mirror. As shown in the detection sensor line, the signal line 8 drawn from the sensor is connected to the back terminal of the speedometer 9 and the (+) power line and 0 volt line are connected to the corresponding terminals + 12V (or + 24V) and 0V display line, respectively. The lead wire is connected to the terminal marked IN. One control output terminal (contact point A) of the speedometer 9 is connected to the power supply 13 'line, and the other is connected to the coil terminal of the relay 20, the buzzer 11, and one terminal of the lamp 10. Then, the other of the lamp 10, the buzzer 11 and the coil terminal of the relay 20 is connected to the other Han group of the power supply 13 'line. The contact Rb (B contact) of the relay 20 is connected in series with the switch SW1 between the movable power supply 13 "of the blower 2 and the blower 2. The power supply terminals 0V and 220V (of the speedometer 9) Or connect the power supply line 13 to SW 110. The blower wheel rotates when the blower is operated by SW 1. After setting the value of the "lower limit setting" display board to "0" temporarily, the speedometer (9) is used. ) When the power is applied with the power switch (SW2), the current rotation speed (RPM) appears on the digital display (9B) of the front panel of the speedometer (9). Set the value of the "lower limit setting" display plate 9A to a value slightly smaller than the minimum value.If the blower 2 has an abnormality, the wing speed is slowed down, and if the wind blowing is weakened, the speed of the fluttering wheel 3 decreases and the speedometer 9 is used. Control of speedometer 9 while below "lower limit value" set on instrument panel Power contact A is closed, alarm function is activated, and contact Rb (B contact) of relay 20 is opened (open circuit) and blower 2 operating circuit is cut off, thus causing blower to be completely disabled. Ventilator (1) or ventilating to prevent airflow (1) or to prevent blows (2) by stopping the operation in the event of an early abnormality, and by early detection of the loss caused by the delayed detection of the blowdown or stoppage for a long time. It is a device for detecting a failure of the blower 2 that is coupled to the duct 1'.A plurality of blowers 2 are installed in one ventilation pipe 1, such as Utility Model Registration No. 0270723 (Patent Application No. 2003-0018048). When speech is delivered at the appropriate interval, if the present invention is applied to only one of the front end of the inlet port or the rear end of the exhaust port, an abnormality alarm may be issued even if one of them is blown regardless of the number of blowers. While the blower is stopped operations.

When the blower is in normal condition, the minimum value of Palanga's rotational speed value is set as the lower limit and in case of abnormality, the Palanga's rotational speed is lower than the lower limit, so combine it with the input signal of the speedometer with the lower limit setting control output function, Ventilation pipe, characterized in that it detects the change in the speed of the flutter vane, stops the operation of the blower and gives an alarm to prevent damage to the blower in advance, and early detection and minimizing the damage caused by abnormal blower function, It is a failure detection device of the blower coupled with the ventilation duct.

Claims (1)

In the blower failure detection method and the apparatus in combination with a ventilation pipe (including a duct), a flute paddle is mounted in the vent pipe (with a duct), and a detector for a sensor is attached to one side of the center of the rotor blade of the flutter and the symmetry is detected. Mounting the sensor, After the above steps, connect the detection signal from the detection sensor to the lower limit setting and the input terminal of the speedometer with the control output function, and connect the alarm buzzer, the display lamp, and the excitation coil of the blower power shutoff relay from the speedometer control output terminal. Steps, Ventilation pipes (including ducts) characterized in that the lower limit of the rotational speed of the speedometer is set by the blowing force passing through the ventilation pipes (including the duct) when the blower is normal after the step is set to the lower limit of the speedometer. Blower fault detection device and construction method