KR100290110B1 - Differential wind pressure sensor - Google Patents

Abstract

PURPOSE: A differential wind pressure sensor is provided to previously prevent the risks due to the leakage of exhaust gas by detecting the normal wind blow state through an exhaust fan with a simple detector to control the operation of a gas boiler. CONSTITUTION: A wind guider guides a portion of wind blown toward an exhaust port by an exhaust fan in a flue(4) to outside of the flue(4). In a blowing correlation unit, a ball(122) is movably inserted into a transparent tube(121) through which wind passes, and the wind guided by the wind guider is induced into the transparent tube(121) to move the ball(122). A blowing detector detects whether the ball is moved in a position according to blowing. A DC power supply(141) converts an input power into a DC power to supply drive power to respective components. An exhaust signal output unit for outputting an exhaust detection signal to a main controller(3) by an output signal of the blowing detector and the blowing detector are commonly mounted on a circuit board(140).

Description

Differential wind pressure sensor

1 is a schematic diagram of a gas boiler provided with an exhaust detection apparatus according to the present invention.

2 is an exploded perspective view of a differential pressure wind pressure sensor according to the present invention.

3 is a circuit diagram of a differential pressure wind pressure sensor according to the present invention.

Figure 4 is a cross-sectional view showing another embodiment of the differential pressure type wind pressure sensor transparent tube according to the present invention.

Figure 5 is a cross-sectional view showing another embodiment of the differential pressure type wind pressure sensor according to the present invention.

* Explanation of symbols for main parts of the drawings

1: boiler 2: gas cylinder

3: main controller 4: year

5: fan motor 6: exhaust fan

7: exhaust damper 8: communication

100: differential pressure wind pressure sensor 101: case

111: Wind guide duct 112: Guide hose

121, 121 ': transparent tube 122: ball

123a, 123b: Stopper 130, 130 ': Photointerrupter (light sensor)

131: light emitting element 132: light receiving element

140: circuit board part 141: DC power supply

142: relay

The present invention relates to a wind pressure sensor, and in particular, acts on the exhaust detection device of the gas boiler to accurately detect whether or not the air is properly blown by the exhaust fan with a simple device to prevent safety accidents due to leakage of gas in the event of poor exhaust gas. It relates to a differential pressure wind pressure sensor that can be prevented.

In general, gas boilers and oil boilers may leak toxic gases due to incomplete combustion, etc., and exhaust these toxic gases to the outside through the flue, and forcibly discharge the exhaust gas to the outside through the flue. Exhaust system such as fan, fan motor and damper to prevent backwind is installed.

In the case of a gas boiler equipped with such an exhaust system, the fan motor of the exhaust system is detected to operate normally, and the operation of the gas boiler is stopped to prevent an accident due to leakage of toxic gas in the event of exhaust failure. .

In the conventional gas boiler exhaust detection device, the drive current of the fan motor is detected to monitor normal exhaust gas, and when the exhaust gas is not exhausted, the gas inlet is blocked and the gas boiler is stopped. It was.

However, such a conventional gas boiler exhaust detection apparatus monitors whether or not it is normal according to the drive current of the fan motor, and thus detects the drive current of the fan motor and sets the detected drive current to the upper and lower limit values when it is normal. There are problems such as complicated circuit configuration such as comparison and malfunction of input power or noise, and only fan motor failure is detected. Therefore, the fan itself is broken or wearable. While the fan motor is normal, such as being bad, the fan is normal, but it does not detect when the air is not properly blown, so there is a disadvantage that may cause a danger due to leakage of the exhaust gas.

In addition, as another example of the conventional exhaust gas detecting device of the gas boiler, it is also known to be connected to the exhaust pipe to sense the change in the exhaust pressure by the wire frame, but this may cause corrosion due to toxic substances mixed in the exhaust gas. There was a disadvantage that the manufacturing cost is expensive.

The object of the present invention is to improve this conventional problem by detecting whether the wind is normally blown by the exhaust fan by the detection device of a simple structure to control the operation of the gas boiler, it is possible to prevent the risk of leakage of the exhaust gas in advance. It is to provide a wind pressure sensor.

An object of the present invention is to provide an exhaust apparatus including an exhaust fan and a fan motor for discharging exhaust gas through flue, and an exhaust damper that can be opened and closed according to the blowing of the exhaust fan and prevents backwind of the exhaust port. Wind guide means for guiding a part of the wind blown by the exhaust fan toward the exhaust port to the outside of the flue, and a ball is inserted into the transparent tube so as to move position in the transparent tube into the transparent tube A blowing interlock means for varying the position of the ball according to whether or not the wind is blown by the incoming air, a blowing detection means for detecting whether the position of the ball of the blowing interlock means is moved to a position according to the blowing air, and an input power source using a DC power source A DC power supply for converting and supplying driving power to each unit, and outputting an exhaust detection signal to the main controller by an output signal of the blower detecting means; Is achieved by constructing a circuit board portion in which an exhaust signal output means and the blower detection means are commonly installed and fixedly coupled to the case in association with the blower interlocking means. Since it detects and outputs a control signal, safety can be further improved, and the exhaust detection device can be configured with a simple structure, thereby reducing cost and installing easily.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic diagram of a gas boiler with a differential pressure wind pressure sensor according to the present invention, Figure 2 is an exploded perspective view of the wind pressure sensor for detecting the exhaust pressure of the gas boiler according to the present invention, Figure 3 is a As a driving circuit diagram of the wind pressure sensor, as shown therein, the gas of the gas cylinder 2 is supplied to the boiler 1 and the operation of the boiler 1 is controlled by the control of the main controller 3. The exhaust fan 6 rotated by the fan motor 5 is installed on the flue 4 of), and the exhaust damper 7 for preventing the counterwind is opened by blowing the exhaust fan 6 and communicating with the exhaust fan 6. It is to be discharged to the outside.

Here, the wind pressure sensor according to the present invention includes wind guide means for guiding a part of the wind blown by the exhaust fan 6 to the exhaust port side on the flue 4 of the boiler 1 to the outside of the flue 4; The ball 122 is inserted into the transparent tube 121 so that the position can be moved, and the wind guided through the wind guide means is introduced into the transparent tube 121 to position the ball 122 according to whether the wind is blown. A blowing interlocking means having a variable value, a blowing detecting means for detecting whether the position of the ball 122 of the blowing interlocking means is moved to a position according to the blowing, and rectifying and smoothing the input power with a DC power supply and supplying it to each driving power supply. A relay 142 for outputting an exhaust detection signal to the main controller 3 side of the boiler by the DC power supply unit 141 and the blowing detection means of the blowing detection means, and a circuit board unit 140 provided with the blowing detection means. It consists of.

The wind guide means, the wind guide duct 111 is installed on one side of the exhaust damper 7 on the flue (4), the wind guided through the wind guide duct 111 is guide hose 112 It is configured to be transmitted to the blowing interlocking means through, and the ventilation interlocking means, the both ends of the oil ("U")-shaped transparent tube 121 is fixed to the exhaust detector case 101 is built up and fixed to the outside, The guide hose 112 of the wind guide means is connected to one end of the transparent tube 121, the exhaust hose is connected to the other end of the transparent tube 121, the exhaust side end of the transparent tube 121 Two stoppers 123a and 123b having regular intervals are inserted therebetween, and the balls 122 are inserted so as to be movable by the wind between the two stoppers 123a and 123b so as to be caught by the upper stopper 123a. The position of the ball 122 is configured to interlock depending on whether or not blowing.

As the blowing detection means, it is installed at a lower portion near the upper stopper 123a of the citron type transparent tube 121 to irradiate light onto the transparent tube 121, and reflect light by the ball 122 or A photo interrupter 130 having a light emitting unit and a light receiving unit is installed to output a light receiving control signal depending on whether the light is blocked.

The control signal output means comprises a plurality of resistors (R1, R2), diodes (Dl-D2), zener diodes (ZD1, ZD2), capacitors (C1-C3), etc. to rectify the input power to a DC power of a predetermined level. And a DC power supply unit 141 which is smoothed to supply the driving power of the light emitting device 131 of the port interrupter 130 and the operating power of the light receiving device 132, and the operating power is supplied from the DC power supply unit 141. And a relay 142 that is controlled based on the output signal of the light receiving element 132 of the photointerrupter 130 and outputs an exhaust detection signal to the main controller 3 side of the boiler. Here, the transistor tr1 is a relay driving transistor for driving the relay 142 based on the output signal of the photointerrupter 130, and the diode D3, the resistor R5, and the capacitor C4 are for relay protection. to be.

In addition, in the present invention, in the case of poor exhaust, the gas is controlled by the control of the main controller 3 to stop the boiler 1, and a warning for notifying that the error state by buzzer and flashing to generate an alarm sound. Including lamps.

Referring to the operation and effect of the exhaust detection device of the boiler according to the present invention configured as described above are as follows.

In the exhaust gas detecting apparatus according to the present invention, the guide duct 111 on the flue 4 and the positive pressure side of one end of the transparent tube 121 are connected through the guide hose 112, and the transparent tube 121 is Expose the negative (-) side of the other end as it is, or connect the exhaust hose, the transparent tube 121 is connected and installed, each element of the photointerrupter 130, the relay 142 and the power supply unit 141, etc. When the transparent tube 121 is placed upright, that is, the ball 122 inserted into the transparent tube 121 is not introduced with the exhaust detector case 101 in which the coupled printed circuit board unit 140 is installed. In order to be in the state of falling down to the lower stopper (123b) side by gravity to be inclined more than a predetermined angle or installed vertically fixed to the wall or the like.

Further, the power plug of the exhaust detection device is connected to a power outlet, and the control signal output terminals, which are both terminals of the relay 142 switch of the exhaust detection device 100, are the exhaust detection signal input terminal of the boiler main controller 3. To.

In such a state, when power is supplied to the boiler to start operation, when the boiler is normally operated, the amount of gas flowing into the boiler 1 is controlled by the control of the main controller 3, and the fan motor 5 is controlled. The exhaust fan 6 is rotated by being driven.

In addition, when the control of the main controller 3 is controlled to input the power of the exhaust detection apparatus 100 at the start of operation, that is, when the fan motor is driven, the DC power supply unit 141 of the circuit board unit 140. ) Rectifies the input power through the diodes D1 and D2 and the zener diodes ZD1 and ZD2 and smoothes it by the capacitor C3 to drive a predetermined level of DC power to the photointerrupter 130 and the relay 142. The power is supplied to the power source, and the light emitting device of the photointerrupter 130 generates light and irradiates it toward the transparent tube 121.

In addition, when the exhaust fan 6 is rotated to blow air, the exhaust damper 7 opens like a dotted line so that the exhaust gas is exhausted to the outside through the communication 8.

At this time, the wind blown by the exhaust fan (6) is partly guided into the guide duct 111, the wind guide means according to the present invention, the wind guided to the guide duct 111 is the guide hose 112 Through the one end of the transparent tube 121 is introduced, the ball 122, which was hanging off the lower stopper 123b by the wind introduced into the transparent tube 121 is pushed to the upper end to be caught by the upper stopper 123a. do.

That is, when wind is introduced into the transparent tube 121 through the guide hose 112, the ball in the transparent tube 121 is moved to the upper end is located on the photointerrupter 130, the ball 122 is While the exhaust fan 6 is normally blown, the exhaust fan 6 is always pushed to the upper end by air pressure so as to cover the upper portion of the photointerrupter 130. At this time, the ball 122 is very light, and also possible to flow in the transparent tube 121, but the gap between the ball 122 and the transparent tube 121 is fine, if only the normal blowing by the exhaust fan (6) The ball 122 is always pushed by the air pressure so that the ball 122 is always positioned on the photointerrupter 130.

When the ball 122 is positioned above the photointerrupter 130 as described above, the light generated by the light emitting device 131 of the photointerrupter 130 is reflected by the ball 122 to receive the light receiving device 132. The light receiving element 132 is turned on as the light is received to open a current path to the coil of the exhaust detection signal generating relay 142.

When a current path is opened in the coil of the relay 142, a magnetic field is generated in the relay coil, and the relay switch is short-circuited to a contact and turned on, thereby outputting an exhaust detection signal indicating that normal exhaust is made to the boiler main controller 3. .

On the other hand, when there is an abnormality in the exhaust fan 6 or when the normal air is not blown due to the fixing or disconnection or short circuit of the fan motor 5, the wind pressure guided through the guide duct 111 is reduced, and accordingly The ball 122 in the transparent tube 121 falls to the lower stopper 123b side by gravity, and the light generated by the light emitting element 131 of the photointerrupter 130 as the ball 122 falls to the lower end. Since the light penetrates the transparent tube, light is not received by the light receiving element 132 and the light receiving element 132 is turned off.

When the light receiving element 132 of the photointerrupter 130 is turned off, since the current path of the coil of the relay 142 is cut off and the magnetic field is removed, the relay switch is opened, and thus the main controller 3 has an exhaust failure. An exhaust detection signal is outputted.

In this case, when the air is not normally blown by the exhaust fan 6, the ball 122 in the transparent tube 121 falls, and the photointerrupter 130 outputs an off signal so that the relay 142 is turned off. The controller 3 immediately cuts off the gas flowing into the boiler 1 according to the exhaust failure, and also generates an alarm sound and flashes a warning light to visually report an error.

In addition, as another embodiment of the exhaust gas detecting apparatus according to the present invention, as shown in FIG. 4, the U-shaped transparent tube may be replaced with a straight transparent tube 121 '. The shape may be any shape, but the ball is inserted into the pipe which can be moved by the wind and moved by the wind, and at least the part where the means for detecting the movement of the ball by the wind is installed. It can be a transparent tube that can transmit, and the ball can be a relatively light and opaque ball that can reflect light.

In addition, as the blowing detection means for detecting the movement of the ball 122, as shown in FIG. 5 on the one side immediately above the lower stopper 123b in the transparent tube 121 instead of the photo interrupter 130 The light emitting device 131 installed to generate light, and the light emitting device 132 installed on the other side corresponding to the light emitting device 131 so that the light of the light emitting device 131 can be received through the transparent tube 121. It can also be configured by installing an optical sensor (hereinafter, photo coupler: 130 '), the photo coupler (130') is the ball 122 is pushed by the wind, the light of the light emitting element 131 is transparent tube ( Since the light is transmitted to the light receiving element 132 through the light source 121, it is possible to detect the normal blowing. When the wind pressure is reduced and the ball 122 falls on the lower stopper 123b, the light emitting element 131 is caused by the ball 122. ), The light is blocked and the light receiving element is turned off to detect that the exhaust is poor.

Therefore, according to the present invention, a movable ball 122 is inserted into the transparent tube 121, and a part of the wind blown by the exhaust fan 6 is guided from the flue 4 to the transparent tube 121. The ball 122 in the transparent tube 121 is pushed to the upper end by the wind, the position movement of the ball 122 is detected by the optical sensor, and the relay 142 controlled by the optical sensor The exhaust gas detection signal is outputted, and the exhaust gas detection signal causes the main controller 3 to stop the gas boiler when the exhaust gas is bad.

As described in detail above, according to the present invention, since the exhaust fan detects whether the air is blown by the exhaust fan, a toxic gas such as not only a failure of the fan motor but also a failure or failure of the exhaust fan or a failure of the exhaust damper can be obtained. All the non-exhaust states can be detected, and the reliability and safety can be increased. The exhaust detection apparatus can be installed simply and singularly, thereby facilitating installation and reducing costs.

The embodiments of the present invention have been specifically described for the purpose of the exhaust gas detection of the gas boiler for the purpose of description, but the technical scope of the present invention is not limited to this and can be modified and improved as much as possible within the scope of ordinary knowledge of those skilled in the art. Applications in other articles similar to gas boilers are also possible.

Claims (5)

The fan motor 5 and the exhaust fan 6, which are controlled by the main controller 3 and discharge the exhaust gas through the flue 4, and can be opened and closed in accordance with the blowing of the exhaust fan 6, and prevents the backwind of the exhaust port. An exhaust apparatus including an exhaust damper (7) for preventing, comprising: wind guidance means for guiding a part of the wind blown by the exhaust fan (6) to the exhaust port side on the flue (4) to the outside of the flue (4); The ball 122 is movably inserted into the transparent tube 121 through which the wind passes, and the wind guided through the wind guide means is introduced into the transparent tube 121 and the position of the ball 122 depends on whether the air is blown. Air blowing means for moving the air, blowing air detecting means for detecting whether the position of the ball 122 of the air blowing means is moved to the position according to the blowing air, and a direct current for converting the input power into DC power to supply the driving power to each part. Power supply unit 141, depending on the output signal of the blowing detection means Exhaust signal output means for outputting the exhaust detection signal to the main controller (3) and the blower detecting means is provided in common and is composed of a circuit board portion 140 fixedly coupled in the case 101 in association with the blowing linkage means Wind pressure sensor, characterized in that. According to claim 1, The wind guide means, the wind guide duct 111 is installed on one side flue (4) of the exhaust damper (7), the wind guided through the wind guide duct 111 Wind pressure sensor, characterized in that configured to be transmitted to the blowing interlock means through the guide hose (112). According to claim 1, As the blowing interlock means, the both ends of the transparent tube 121 is fixed to the case 101, the wind guide means is connected to one end of the transparent tube 121, In the transparent tube 121, two stoppers 123a and 123b, through which wind passes, are inserted, and a ball 122 pushed by the wind between the two stoppers 123a and 123b. The wind pressure sensor, characterized in that the position of the ball 122 is configured to be interlocked according to the blowing. According to claim 3, The blowing detection means, by irradiating light to the transparent tube 121 outputs a control signal by the light reception according to the reflection of light by the ball 122 is moved by the wind position Wind pressure sensor, characterized in that configured by installing an optical sensor. The method of claim 1, wherein the control of the main controller (3) shuts off the gas and stops the boiler (1) in case of a poor exhaust gas, and a buzzer and a flashing light for generating an alarm sound to indicate an error condition. Wind pressure sensor, characterized in that configured to include a warning lamp.