JP2013125786A - Unit and method for monitoring air flow, and heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a unit and method for monitoring air flow, capable of facilitating a grasp of the air flow of air blown off from a fan, and to provide a heat exchanger.SOLUTION: The seesaw type unit X for monitoring air flow comprises: a seesaw plate 22 supported to be tiltable through a support member 21; one end section 23 formed on one end side of the seesaw plate 22; the other end section 24 formed on the other end side of the seesaw plate 22; a sensor 26 that transmits an ON signal when there is either one of the proximity or spacing of the other end section 24 and transmits an oFF signal when there is the other one thereof; and a notification section that makes a notification of a detection result on the basis of a signal transmitted from the sensor 26. The one end section 23 is disposed at such a position as to face an air inlet 8 or an air outlet 10, and is deflected by the wind generated by a fan 6 and determines whether or not the air flow passing through a filter 7 by a tilting motion of the seesaw plate 22 exceeds a predetermined air flow.

Description

  The present invention relates to an air volume monitoring unit, an air volume monitoring method, and a heat exchanger.

  Conventionally, a technique for installing a heat exchanger in a part of a cabinet of the control panel in order to cool the inside of the control panel is known. For example, a heat exchanger (cooling device) described in Patent Document 1 includes a casing installed in a cabinet of a control panel, and fins that bisect the casing into a control panel side and an external side. .

  The control panel side of the heat exchanger has an intake port for sucking air in the cabinet of the control panel, a blowout port for blowing the sucked air into the cabinet, and a fan for sending air on the control panel side in the casing And.

  On the other hand, the outside of the heat exchanger is provided with an intake port for taking in outside air, a blow-out port for blowing out the sucked air to the outside, and a fan for sending outside air in the casing. Although not described in Patent Document 1, a filter is usually installed at least one of the air inlet and the air outlet so that dust or the like does not enter the casing.

Registered Utility Model No. 3000536

  In the conventional control panel, if the filter is clogged or dust adheres to the flow path from the air inlet to the air outlet, the amount of air sent from the heat exchanger decreases and the cooling efficiency in the control panel also increases. The problem was that it would lead to failure of the equipment in the panel because of the decrease. In order to prevent this, the heat exchanger is inspected, but there is a problem that the inspection operation becomes complicated depending on the number of installed control panels.

  The present invention was created to solve such problems, and provides an air volume monitoring unit, an air volume monitoring method, and a heat exchanger capable of easily grasping the air volume of air sent from a fan. This is the issue.

  In order to solve the above-described problems, the present invention provides a fan, a flow path through which air sucked by the fan flows, an intake port formed on one end side of the flow path, and an air outlet formed on the other end side. A filter for preventing dust from flowing into the flow path, and an air volume monitoring unit installed in an apparatus comprising: a seesaw plate tiltably supported through a support member; and one end of the seesaw plate An ON signal is transmitted in one of the one end provided on the side, the other end provided on the other end of the seesaw plate, and the proximity and separation of the other end, and in the other case A sensor that transmits an OFF signal to the sensor, and a notifying unit that notifies a detection result based on the signal transmitted from the sensor, and the one end is disposed at a position facing the inlet or the outlet. In the wind generated by the fan It is configured to displace I, and judging whether more than air volume air volume passing through the filter is preset by tilting of the seesaw plates.

  According to such a configuration, since the wind sucked into the intake port or the wind blown out from the air outlet is detected using the tilt of the seesaw plate, it is possible to easily grasp the air volume of the air supplied from the fan. it can. Moreover, since a detection result is alert | reported outside by providing an alerting | reporting part, labor saving of inspection work can be achieved.

  Moreover, it is preferable that the said apparatus is a heat exchanger. According to this configuration, it is possible to prevent a decrease in the performance of the heat exchanger.

  Further, the present invention provides a fan, a flow path through which air sucked by the fan flows, an intake port formed on one end side of the flow path, an air outlet formed on the other end side, and the flow path An air volume monitoring method in a device comprising a filter for preventing dust from flowing in, wherein a seesaw plate tilted by the flow of wind generated by the fan is disposed at a position facing the air inlet or the air outlet And it is characterized by determining whether the air volume which passes the said filter exceeds the preset air volume by the inclination of the said seesaw board.

  According to such a method, since the wind sucked into the intake port or the wind blown out from the air outlet is detected using the tilt of the seesaw plate, it is possible to easily grasp the air volume of the air supplied from the fan. it can.

  Further, the present invention provides a fan, a flow path through which air sucked by the fan flows, an intake port formed on one end side of the flow path, an air outlet formed on the other end side, and the flow path In a heat exchanger provided with a filter for preventing dust from flowing in, an air volume monitoring unit is installed to detect the air blown from the air outlet or the air sucked into the air inlet and monitor the air volume passing through the filter It is characterized by being.

  According to this configuration, the air volume monitoring unit can easily grasp the air volume of the air supplied from the fan of the heat exchanger.

  According to the air volume monitoring unit, the air volume monitoring method, and the heat exchanger according to the present invention, the air volume of the air sent from the fan can be easily grasped.

It is the model side view which showed the seesaw type air volume monitoring unit and windmill type air volume monitoring unit which concern on 1st embodiment. It is a model side view which shows the effect | action of the seesaw type | mold air volume monitoring unit which concerns on 1st embodiment, Comprising: (a) shows the time of normality, (b) shows the time of abnormality. It is the model side view which showed the seesaw type air volume monitoring unit and windmill type air volume monitoring unit which concern on 2nd embodiment.

[First embodiment]
A first embodiment of the present invention will be described in detail with reference to the drawings. In this embodiment, the case where an air volume monitoring unit is installed in the heat exchanger 2 which cools the inside of the control panel 1 is illustrated. The heat exchanger 2 is assembled in the cabinet 3 of the control panel 1. The control panel 1 is provided with a plurality of power distribution boards, operation boards, switch boards (not shown), and the like. First, the configuration of the heat exchanger 2 will be described.

  The heat exchanger 2 includes a casing 4 that is exposed inside and outside the cabinet 3, and fins 5 that bisect the inside of the casing 4 into the inside and outside of the cabinet 3.

  The internal side of the heat exchanger 2 includes an internal intake fan 6, an internal filter 7, an internal intake port 8, an internal flow path 9, and an internal air outlet 10. The internal intake fan 6 is an intake fan and is installed in the internal intake port 8. The internal filter 7 is installed on the inner side (upstream side) than the internal intake fan 6 and captures dust and the like mixed in the sucked air. The air taken in by the internal intake fan 6 is blown out of the casing 4 (inside the cabinet 3) from the internal blowout port 10 through the internal flow path 9.

  The external side of the heat exchanger 2 includes an external intake fan 16, an external filter 17, an external intake port 18, an external flow path 19, and an external air outlet 20. The external intake fan 16 is an intake fan and is installed in the external intake port 18. The external filter 17 is installed outside the external intake fan 16 and captures dust and the like mixed in the sucked air. The air taken in by the external intake fan 16 is blown out of the casing 4 (outside of the cabinet 3) through the external flow path 19 from the external air outlet 20.

  Although the temperature in the cabinet 3 rises due to the heat generated from the power distribution base, the operation base, the switch base, and the like disposed in the cabinet 3, according to the heat exchanger 2, the outside of the casing 4 through the fins 5. The temperature in the cabinet 3 can be lowered by heat exchange between the cold air on the side and the warmed air on the inner side of the casing 4.

  One air volume monitoring unit according to the present embodiment is installed inside and outside the heat exchanger 2. That is, a seesaw type air volume monitoring unit X is installed inside the heat exchanger 2, and a windmill type air volume monitoring unit Y is installed outside the heat exchanger 2.

  The seesaw type air volume monitoring unit X detects the wind blown from the internal blower outlet 10 of the heat exchanger 2. The seesaw-type air volume monitoring unit X is mainly configured by including a support member 21, a seesaw plate 22, and a sensor 26.

  The support member 21 is a member that supports the seesaw plate 22. A magnet 21 a is installed on one end side of the support member 21. The support member 21 is attached to the inner wall surface 4a of the casing 4 via a magnet 21a. The support member 21 is detachable by a magnet 21a.

  The seesaw plate 22 is a plate-like member formed to be tiltable. The material of the seesaw plate 22 is not particularly limited, but is formed of a synthetic resin in the present embodiment. The seesaw plate 22 is provided on one end side of the seesaw plate 22 and receives an air blown from the internal air outlet 10; the other end portion 24 provided on the other end side of the seesaw plate 22; And a shaft portion 25.

  The one end portion 23 is arranged so that the surface thereof faces the internal air outlet 10. A metal piece is attached to a portion of the other end 24 that faces the sensor 26. The shaft portion 25 is disposed above the internal air outlet 10. The shaft portion 25 extends horizontally in the plate width direction of the seesaw plate 22 and is parallel to the wall surface 4 a on the inner side of the casing 4. The shaft portion 25 is formed not at the center of the seesaw plate 22 but at an eccentric position.

  That is, in the seesaw plate 22, the length from the shaft portion 25 to the tip of the one end portion 23 is longer than the length from the shaft portion 25 to the tip of the other end portion 24. Thereby, for example, when the internal intake fan 6 is stopped, the seesaw plate 22 is substantially parallel to the vertical direction by its own weight. By appropriately changing the length (weight) of the one end 23 side of the seesaw plate 22, it is possible to set in advance how much the seesaw plate 22 is tilted and detected by the sensor 26. The adjustment may be made by attaching a weight to the one end 23.

  The sensor 26 is a member that detects the proximity or separation of the other end 24. The sensor 26 is supported by the support member 21 and is disposed closer to the casing 4 than the seesaw plate 22. The sensor 26 is electrically connected to a notification unit (not shown). In the present embodiment, the sensor 26 is configured to transmit an ON signal to the notification unit when it detects that the other end 24 has approached. The sensor 26 is configured to transmit an OFF signal to the notification unit when it detects that the other end 24 is separated. For example, the notification unit is configured to notify visually or audibly when an OFF signal is received.

  Note that the notification method is not limited to the above-described configuration. For example, when the notification unit receives an ON signal, “normal” is displayed on a display device such as a monitor, and when an OFF signal is received, “abnormal” is displayed. You may comprise so that it may alert | report. Moreover, you may make it alert | report that it is normal only at the time of normal. Further, for example, an OFF signal may be transmitted when the other end 24 approaches the sensor 26, and an ON signal may be transmitted when the other end 24 is separated.

  Next, the operation of the seesaw type air volume monitoring unit X will be described. As shown in FIG. 2A, when the wind blown from the internal blower outlet 10 (see FIG. 1) exceeds a preset air volume (normal), one end 23 of the seesaw plate 22 is pushed by the wind. Tilt counterclockwise against the weight. Thereby, since the other end 24 of the seesaw plate 22 is close to the sensor 26, the sensor 26 transmits an ON signal to the notification unit.

  On the other hand, when the wind blown out from the internal air outlet 10 (see FIG. 1) does not exceed the preset air volume (when abnormal), the one end portion 23 of the seesaw plate 22 is not pushed by the wind, so that its own weight causes normal Tilt clockwise from the hour position. In the present embodiment, the seesaw plate 22 is in a state of being parallel or nearly parallel to the vertical direction at the time of abnormality. Thereby, since the other end 24 of the seesaw plate 22 is separated from the sensor 26, the sensor 26 transmits an OFF signal to the notification unit. The notification unit that has received the OFF signal visually or audibly notifies that the blown-out wind does not exceed a predetermined air volume.

  Next, the windmill type air volume monitoring unit Y will be described. As shown in FIG. 1, the wind turbine type air volume monitoring unit Y detects wind blown from the external air outlet 20 of the heat exchanger 2. The windmill type air volume monitoring unit Y mainly includes a support member 31, a windmill 32, a power generation unit 33, a board and a notification unit (not shown).

  The support member 31 is a member that supports the wind turbine 32 and the power generation unit 33. One end side of the support member 31 is connected to the outer wall surface 4 b of the casing 4. A power generation unit 33 is supported on the other end side of the support member 31.

  The windmill 32 is a member that rotates by receiving the wind blown from the external air outlet 20. It arrange | positions so that the front side of the windmill 32 may oppose the external blower outlet 20. FIG. The power generation unit 33 is a member that converts the rotational energy of the windmill 32 into electric power. The power generation unit 33 uses a motor in this embodiment. The power generation unit 33 is electrically connected to a substrate and a notification unit (not shown) via a line 34.

  A voltage detection unit is formed on the substrate, and is configured to transmit an ON signal to the notification unit when the generated voltage exceeds a preset voltage value (normal time). On the other hand, when the generated voltage does not exceed a preset voltage value (at the time of abnormality), an OFF signal is transmitted to the notification unit. For example, when the OFF signal is received, the notification unit is configured to notify visually or audiovisually that a predetermined air volume is not exceeded.

  Note that the notification method is not limited to the above-described configuration. For example, when the notification unit receives an ON signal, “normal” is displayed on a display device such as a monitor, and when an OFF signal is received, “abnormal” is displayed. You may comprise so that it may alert | report. Moreover, you may make it alert | report that it is normal only at the time of normal. Also, for example, when the generated voltage exceeds a preset voltage value (normal), an OFF signal is transmitted to the notifying unit, and when the preset voltage value is not exceeded (abnormal), the notifying unit You may set so that an ON signal may be transmitted.

  Further, by installing a volume on the substrate, it is possible to adjust the voltage when transmitting an ON signal or an OFF signal. Thereby, it is possible to adjust how much air volume is notified.

  According to the seesaw type air volume monitoring unit X and the windmill type air volume monitoring unit Y described above, the air volume of the air sent from the fans (the internal intake fan 6 and the external intake fan 16) can be easily grasped. Conventionally, a device is known in which a rotation speed detection sensor or the like is provided on a fan to grasp a normal or abnormal state according to the rotation speed of the fan, but in such a configuration, the filter is clogged or the flow path Although the fan is blocked, the fan speed does not decrease and an abnormal state may not be detected. However, according to this embodiment, in order to detect the wind blown from the blower outlet (internal blower outlet 10, external blower outlet 20), clogging of the filter (internal filter 7, external filter 17) and the flow path ( It is possible to grasp the closed state of the internal flow path 9 and the external flow path 19).

  Further, according to the seesaw type air volume monitoring unit X, since it is determined by tilting the seesaw plate 22 whether or not the wind blown from the internal air outlet 10 exceeds a preset air volume, a simple configuration is adopted. be able to. In addition, when the air volume does not exceed the preset air volume, it is tilted by its own weight, so that a simpler configuration can be achieved.

  Further, according to the wind turbine type air volume monitoring unit Y, since it is configured to determine whether or not the wind blown from the external air outlet 20 exceeds a preset air volume by the electric power generated by the rotation of the wind turbine 32, Can be configured. Further, by arranging the windmill type air volume monitoring unit Y on the outside of the cabinet 3, it is possible to visually confirm whether or not the windmill 32 is rotating from the outside of the cabinet 3.

  Although the embodiments of the present invention have been described above, design changes can be made as appropriate without departing from the spirit of the present invention. For example, in this embodiment, the seesaw type air volume monitoring unit X is provided inside the cabinet 3 and the windmill type air quantity monitoring unit Y is installed outside. However, the windmill type air quantity monitoring unit Y is provided inside and the seesaw type air quantity monitoring unit is outside. A monitoring unit X may be provided. Further, a seesaw type air volume monitoring unit X may be set inside or outside the cabinet 3, or a windmill type air volume monitoring unit Y may be installed.

  The internal filter 7 may be installed in the internal flow path 9 or the internal air outlet 10. Similarly, the external filter 17 may be installed in the external flow path 19 or the external air outlet 20.

  The wind turbine type air volume monitoring unit Y is configured to detect the voltage of electricity generated by the power generation unit 33. However, the current or frequency may be detected.

  Further, a thermo switch (not shown) or the like may be installed in the cabinet 3 so that the heat exchanger 2 operates when the inside of the cabinet 3 exceeds a preset temperature. Further, the support member 21 and the support member 31 may be attached to the cabinet 3.

  Further, in this embodiment, the seesaw type air volume monitoring unit X and the windmill type air volume monitoring unit Y are installed in the heat exchanger 2 of the control panel 1, but the flow path through which the fan, the filter, and the air sucked by the fan flow is supplied. In addition, a seesaw type air volume monitoring unit X or a windmill type air volume monitoring unit Y may be installed in the apparatus provided with an air inlet and an air outlet formed at the end of the flow path.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. As shown in FIG. 3, the air volume monitoring unit according to the second embodiment is different in that the wind flow is opposite to that of the first embodiment. About the part which is common in 1st embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The internal side of the heat exchanger 2 includes an internal exhaust fan 46, an internal filter 47, an internal intake port 48, an internal flow path 49, and an internal air outlet 50. The internal exhaust fan 46 is an exhaust fan and is disposed at the internal air outlet 50. The internal filter 47 is installed in the internal air inlet 48 and captures dust and the like mixed in the sucked air. The air taken in by the internal exhaust fan 46 is blown out of the casing 4 (inside the cabinet 3) through the internal flow path 49 from the internal blowout port 50.

  The external side of the heat exchanger 2 includes an external exhaust fan 56, an external filter 57, an external intake port 58, an external flow path 59, and an external air outlet 60. The external exhaust fan 56 is an exhaust fan and is installed at the external air outlet 60. The external filter 57 is installed in the external intake port 58 and captures dust and the like mixed in the sucked air. The air taken in by the external exhaust fan 56 is blown out of the casing 4 (outside of the cabinet 3) through the external flow path 59 from the external air outlet 60.

  One air volume monitoring unit according to the present embodiment is installed inside and outside the heat exchanger 2. That is, the seesaw type air volume monitoring unit X1 is installed inside the heat exchanger 2, and the windmill type air volume monitoring unit Y1 is installed outside the heat exchanger 2.

  The seesaw type air volume monitoring unit X1 detects the wind sucked into the internal air inlet 48 of the heat exchanger 2. The seesaw type air flow monitoring unit X1 is mainly configured by including a support member 21, a seesaw plate 22, and a sensor 26.

  The seesaw plate 22 is a plate-like member formed to be tiltable. The material of the seesaw plate 22 is not particularly limited, but is formed of a synthetic resin in the present embodiment. The seesaw plate 22 is provided on one end side of the seesaw plate 22 and sucked by a negative pressure acting in the vicinity of the internal air inlet 48, the other end portion 24 provided on the other end side of the seesaw plate 22, It is comprised by the axial part 25 used as an axis | shaft.

  The one end portion 23 is disposed so that the surface thereof faces the internal intake port 48. A metal piece is attached to a portion of the other end 24 that faces the sensor 26. The shaft portion 25 is disposed above the internal intake port 48. The shaft portion 25 extends horizontally in the plate width direction of the seesaw plate 22 and is parallel to the wall surface 4 a on the inner side of the casing 4. The shaft portion 25 is formed not at the center of the seesaw plate 22 but at an eccentric position.

  That is, in the seesaw plate 22, the length from the shaft portion 25 to the tip of the one end portion 23 is longer than the length from the shaft portion 25 to the tip of the other end portion 24. Thereby, for example, when the internal exhaust fan 46 is stopped, the seesaw plate 22 is substantially parallel to the vertical direction by its own weight. By appropriately changing the length (weight) on the one end portion 23 side of the seesaw plate 22, a negative pressure is applied in the vicinity of the internal intake port 48, and how much the one end portion 23 is sucked to the internal intake port 48 side. In this case, it can be set in advance whether the sensor 26 detects it. The adjustment may be made by attaching a weight to the one end 23.

  The sensor 26 is a member that detects the proximity or separation of the other end 24. The sensor 26 is supported by the support member 21 and is disposed on the opposite side of the casing 4 with respect to the seesaw plate 22. The sensor 26 is electrically connected to a notification unit (not shown).

  Next, the operation of the seesaw type air volume monitoring unit X1 will be described. As shown in FIG. 3, when the wind sucked into the internal air intake 48 exceeds a preset air volume (normal), one end 23 of the seesaw plate 22 is sucked toward the internal air intake 48 and resists gravity. Tilt clockwise. Thereby, since the other end 24 of the seesaw plate 22 is close to the sensor 26, the sensor 26 transmits an ON signal to the notification unit.

  On the other hand, when the air sucked into the internal air inlet 48 does not exceed a preset air volume (when abnormal: drawn with a dotted line), the one end 23 of the seesaw plate 22 is not sucked, so that its own weight causes normal operation. Tilt counterclockwise from the position of. In the present embodiment, the seesaw plate 22 is in a state of being parallel or nearly parallel to the vertical direction at the time of abnormality. Accordingly, since the other end 24 of the seesaw plate 22 is separated from the sensor 26, it is visually or audibly informed that the sucked wind does not exceed the preset air volume.

  Next, the windmill type air volume monitoring unit Y1 will be described. As shown in FIG. 3, the wind turbine type air volume monitoring unit Y <b> 1 detects the wind sucked into the external air inlet 58 of the heat exchanger 2. The windmill type air volume monitoring unit Y1 is mainly configured by a support member 31, a windmill 32, a power generation unit 33, and a board and a notification unit (not shown).

  The windmill 32 is a member that rotates due to the wind sucked into the external air intake 58 when a negative pressure acts in the vicinity of the external air intake 58. The wind turbine 32 is disposed so that the front side faces the external air inlet 58. The power generation unit 33 is a member that converts the rotational energy of the windmill 32 into electric power. The power generation unit 33 uses a motor in this embodiment. The power generation unit 33 is electrically connected to a substrate and a notification unit (not shown) via a line 34.

  A voltage detection unit is formed on the substrate, and is configured to transmit an ON signal to the notification unit when the generated voltage exceeds a preset voltage value (normal time). On the other hand, when the generated voltage does not exceed a preset voltage value (at the time of abnormality), an OFF signal is transmitted to the notification unit. For example, when the OFF signal is received, the notification unit is configured to notify visually or audiovisually that a predetermined air volume is not exceeded.

  Here, it is considered that the amount of wind sucked into the internal intake port 48 is substantially equal to the amount of wind sent from the internal exhaust fan 46. Further, it is considered that the air volume sucked into the external intake port 58 is substantially equal to the air volume supplied from the external exhaust fan 56. Therefore, according to the seesaw type air volume monitoring unit X1 and the windmill type air volume monitoring unit Y1 described above, the air volume of the air sent from the fans (the internal exhaust fan 46 and the external exhaust fan 56) can be easily grasped. . Conventionally, a device is known in which a rotation speed detection sensor or the like is provided on a fan to grasp a normal or abnormal state according to the rotation speed of the fan, but in such a configuration, the filter is clogged or the flow path Although the fan is blocked, the fan speed does not decrease and an abnormal state may not be detected.

  However, according to the present embodiment, the wind sucked into the intake port (internal intake port 48, external intake port 58), that is, the wind blown out from the air outlet (internal air outlet 50, external air outlet 60) is detected. Therefore, it is possible to grasp the clogging of the filters (internal filter 47, external filter 57), the closed state of the flow paths (internal flow path 49, external flow path 59), and the like.

  Further, according to the seesaw type air volume monitoring unit X1, since it is determined by the tilt of the seesaw plate 22 whether or not the wind sucked into the internal intake port 48 exceeds a preset air volume, the structure is simplified. Can do. In addition, when the air volume does not exceed the preset air volume, it is tilted by its own weight, so that a simpler configuration can be achieved.

  In addition, according to the wind turbine type air volume monitoring unit Y1, since it is configured to determine whether or not the wind sucked into the external intake port 58 exceeds a preset air volume by the electric power generated by the rotation of the wind turbine 32, the simple configuration is simple. Can be configured. Further, by arranging the windmill type air volume monitoring unit Y1 on the outside of the cabinet 3, it is possible to visually confirm from the outside of the cabinet 3 whether or not the windmill 32 is rotating.

1 Control panel 2 Heat exchanger 3 Cabinet 4 Casing 5 Fin 6 Internal intake fan (fan)
7 Internal filter (filter)
8 Internal intake (intake)
9 Internal channel (channel)
10 Internal air outlet (air outlet)
16 External intake fan (fan)
17 External filter (filter)
18 External intake (intake)
19 External channel (channel)
20 External air outlet (air outlet)
DESCRIPTION OF SYMBOLS 21 Support member 22 Seesaw plate 23 One end part 24 Other end part 25 Shaft part 26 Sensor 31 Support member 32 Windmill 33 Electric power generation part X Seesaw type airflow monitoring unit Y Windmill type airflow monitoring unit

Claims (4)

A fan, a flow path through which air sucked by the fan flows, an intake port formed on one end side of the flow path, an air outlet formed on the other end side, and dust flowing into the flow path. An air flow monitoring unit installed in a device equipped with a filter to prevent,
A seesaw plate that is tiltably supported via a support member;
One end provided on one end of the seesaw plate;
The other end provided on the other end of the seesaw plate,
A sensor that transmits an ON signal in the case of one of the proximity and separation of the other end, and an OFF signal in the other case;
A notification unit for notifying a detection result based on a signal transmitted from the sensor,
The one end is disposed at a position facing the air inlet or the air outlet, and is configured to be displaced by wind generated by the fan.
An air volume monitoring unit for determining whether or not an air volume passing through the filter exceeds a preset air volume by tilting the seesaw plate.   The air volume monitoring unit according to claim 1, wherein the device is a heat exchanger. A fan, a flow path through which air sucked by the fan flows, an intake port formed on one end side of the flow path, an air outlet formed on the other end side, and dust flowing into the flow path. An air volume monitoring method in a device comprising a filter for preventing,
A seesaw plate that is inclined by the wind generated by the fan is disposed at a position facing the intake port or the air outlet,
An air volume monitoring method comprising: determining whether or not an air volume passing through the filter exceeds a preset air volume by tilting the seesaw plate. A fan, a flow path through which air sucked by the fan flows, an intake port formed on one end side of the flow path, an air outlet formed on the other end side, and dust flowing into the flow path. A heat exchanger with a preventing filter,
A heat exchanger comprising an air volume monitoring unit that detects air blown from the air outlet or wind sucked into an air inlet and monitors the air volume passing through the filter.

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