JP5119897B2 - Simultaneous exhaust / exhaust fan - Google Patents

Description

  The present invention relates to a simultaneous supply / exhaust type ventilation fan that continuously ventilates an indoor environment such as a living room by a simultaneous supply / exhaust type exhaust fan for 24 hours.

  Conventionally, this type of simultaneous supply / exhaust ventilation fan is known to be embedded in the ceiling as a simultaneous supply / exhaust means for a ventilation system of a highly airtight house such as a highly airtight and highly insulated house.

  Hereinafter, an example of the simultaneous supply / exhaust type ventilation fan will be described with reference to FIG.

As shown in FIG. 12, the main body 101 installed on the back of the ceiling of the house has a louver part provided with an indoor air supply port 102 for blowing outdoor air toward the room and an indoor exhaust port 103 for sucking indoor air. 104 is installed along the ceiling surface, and an exhaust fan 106, an exhaust casing 107, and an exhaust fan 106 in the shape of a centrifugal fan are placed in an exhaust air passage 105 provided to exhaust indoor air from the indoor exhaust port 103 to the outside. The hood 109 installed on the outdoor wall surface is provided with a motor 108 that rotates. The outdoor exhaust port 110 that blows out the air exhausted from the indoor exhaust port 103 to the outside and the indoor air supply port 102 are provided. An outdoor air supply port 111 that sucks in air that supplies outdoor air is provided, and an exhaust air passage 105 that connects the indoor exhaust port 103 to the outdoor exhaust port 110 is provided. The air supply duct 114 that forms the exhaust air duct 112 and the air supply air passage 113 that connects the indoor air supply opening 102 to the outdoor air supply opening 111 is an inner pipe, and the air supply duct 114 is an outer pipe. It consists of a double pipe.
Japanese Patent Laid-Open No. 2003-130417

  In such a conventional simultaneous supply / exhaust ventilation fan, when constructing a double pipe connecting the main body and the hood, the connection location is exposed to the outside, so the inner pipe is connected and the connection state is visually checked By connecting the outer pipe after recognizing in the above, it can be reliably constructed without any gaps in the connection location, but as in the present invention, the main body is installed on the indoor side of the wind tunnel pipe communicating with the wall surface of the house indoors and outdoors However, when installing a hood on the outdoor side and connecting a double pipe consisting of an outer pipe and an inner pipe in the wind tunnel pipe, the connection between the inner pipe and the main body, and the inner pipe and the hood is inside the wall body. Therefore, there is a problem that the connection state cannot be recognized, and it is required to recognize the connection state when constructing.

  In addition, there is a problem that a gap occurs at the connection point between the inner pipe and the main body, and the inner pipe and the hood, and even if a short circuit occurs between the supply air and the exhaust, it cannot be recognized. It is required to recognize that the supply air and the exhaust are short-circuited.

  The present invention solves such a conventional problem, and recognizes the connection state between the inner tube and the main body and the inner tube and the hood when performing construction, so that there is no gap at the connection location. An object of the present invention is to provide a simultaneous supply / exhaust type exhaust fan that is connected so that a short circuit between the supply air and the exhaust does not occur.

In order to achieve the above-mentioned goal, the simultaneous supply / exhaust ventilation fan of the present invention includes a cylindrical wind tunnel pipe provided on the wall surface that communicates with the outside of the room, communicates with the outdoor side of the wind tunnel pipe, and is installed on the outdoor wall surface. The hood has an outdoor exhaust port for exhausting air from the room to the outdoor and an outdoor air supply port for supplying air from the outdoor to the room, and the hood has a hood outer pipe at the connection with the wind tunnel pipe. By providing a hood inner pipe inside the hood outer pipe, separate air passages are formed on the outer side of the hood inner pipe and the inner side of the hood inner pipe, and are inserted from the indoor side of the wind tunnel pipe to the indoor side wall surface. The main body to be installed has a main body outer pipe and a main body inner pipe inside the main body outer pipe, an indoor exhaust port for exhausting air from the room, an exhaust blower, and an indoor air supply port for supplying air to the room from the outside Equipped with an air blower, connecting the main body inner pipe and the hood inner pipe By providing an inner pipe connecting pipe, an exhaust air path connecting the outdoor exhaust port from the indoor exhaust port via the exhaust air blower, and an air supply air path connecting the indoor air supply port from the outdoor air supply port via the air supply fan That recognizes the connection between the inner pipe connection pipe and the main body inner pipe, and the inner pipe connection pipe and the hood inner pipe when the inner pipe connection pipe is installed and constructed. When the inner pipe connecting pipe is not connected to the main body inner pipe or the hood inner pipe, the main body cannot be installed from the indoor side of the wind tunnel pipe and installed on the indoor side wall surface, or the hood is Construction leakage prevention means is provided which is configured to communicate with the outdoor side of the wind tunnel pipe and cannot be installed on the outdoor side wall surface .

  When constructing by this means, it is possible to recognize the connection state between the inner pipe connection pipe and the main body inner pipe, and the inner pipe connection pipe and the hood inner pipe, and there is no gap at the connection place, and air supply and exhaust are performed. A simultaneous supply / exhaust type exhaust fan that provides a connection that does not cause a short circuit is obtained.

Further, the other means includes a detecting means for detecting connection / non-connection of the inner pipe connecting pipe and the hood inner pipe, and an abnormality notifying means for notifying an abnormality when detecting the non-connection by the detecting means. The exhaust fan and the exhaust motor are configured to perform exhaust by rotating the exhaust motor, and the supply fan is configured of the supply fan and the supply motor. The supply fan is configured by the rotation of the supply motor. A display that has a function of supplying air by rotating the exhaust, and has a rotation speed detection means for detecting the rotation speed of the exhaust fan and the supply fan as the detection means, and displays an abnormality on the front side on the indoor side of the main body as an abnormality notification means When an exhaust fan and an air supply fan are operated, when it is detected that the rotational speed of at least one of the exhaust fan and the air supply fan exceeds a certain range, an abnormality is displayed on the display unit. Like It is intended.

  The other means includes a plurality of inner dampers standing from the inside of the hood inner pipe toward the inside, and a plurality of outer dampers standing from the outer side of the hood inner pipe toward the outside. The outer damper has the same damper rotation axis, and the damper rotation axis is provided on the circumference of the hood inner pipe and perpendicular to the axial direction of the hood inner pipe, so that the inner damper is chambered around the damper rotation axis. When the outer damper is inclined toward the outside and the outer damper is inclined toward the outdoor side, the air path formed inside the hood inner pipe and the air path formed outside the hood inner pipe can be simultaneously opened and closed. When the inner pipe connecting pipe is inserted into the hood inner pipe, the inner pipe connecting pipe and the inner damper are in contact with each other, the inner damper is inclined toward the outdoor side, and the outer damper is inclined toward the outdoor side. It is obtained to open the air passage outside the inner air passage and the hood inner pipe of the hood inner tube at the same time with the.

  Another means is equipped with measuring means that can measure the distance from the main body inner pipe to the hood inner pipe when attaching the inner pipe connecting pipe, and the length of the inner pipe connecting pipe is adjusted by the distance measured by the measuring means. To do.

  Another means includes a cylindrical wind tunnel pipe provided on the wall surface that communicates between the interior and the exterior, a hood installed outside the wind tunnel pipe, and the hood exhausts air from the room to the outside. The hood is equipped with an outdoor air supply port for supplying air from the outside to the room, and the hood is provided with a hood outer pipe at the connecting portion with the wind tunnel pipe, and the hood inner pipe is provided inside the hood outer pipe. Separate air paths are formed on the outside of the tube and the inside of the hood tube, and the main body inserted from the indoor side of the wind tunnel pipe includes the main body inner tube on the inner side of the outer tube and the outer tube of the main body. An indoor exhaust port that includes an indoor exhaust port and an exhaust blower for exhausting air, an indoor air supply port and an air supply blower that supplies air from outside to the room, and an inner pipe connection pipe that connects the main body inner pipe and the hood inner pipe. Through the exhaust fan to the outdoor exhaust This is a configuration that ventilates by forming a supply air passage that connects the exhaust air passage and the indoor air supply port from the outdoor air supply port via the air supply blower. is there.

  The other means is provided with a telescopic bellows as a telescopic inner tube connecting tube, and a fixed portion that can be fixedly connected to the main body inner tube and the hood inner tube.

  According to the present invention, there is no gap in the connecting portion between the inner pipe connecting pipe and the main body inner pipe, and the inner pipe connecting pipe and the hood inner pipe when construction is performed, and the short circuit between the supply air and the exhaust does not occur. Therefore, it is possible to provide a simultaneous supply / exhaust ventilation fan having an effect of reliably performing indoor and outdoor ventilation.

The invention according to claim 1 of the present invention includes a cylindrical wind tunnel pipe provided on the wall surface that allows communication between the interior and the exterior, a hood that communicates with the outdoor side of the wind tunnel pipe, and that is installed on the outdoor wall surface. Has an outdoor exhaust port for exhausting air from the room to the outside and an outdoor air supply port for supplying air from the outside to the room, and the hood has a hood outer pipe at the connection with the wind tunnel pipe, and the inside of the hood outer pipe. The hood inner pipe is provided with a separate air passage on the outside of the hood inner pipe and the inside of the hood inner pipe, and the main body installed on the indoor side wall surface by inserting from the indoor side of the wind tunnel pipe is the main body. A main body inner pipe is provided inside the outer pipe and the main body outer pipe, an indoor exhaust port and an exhaust blower for exhausting air from the room, an indoor air supply port and an air supply blower for supplying air from the outside to the room, Provide an inner pipe connecting pipe that connects the pipe and the hood inner pipe. Ventilation by forming an exhaust air path connecting the outdoor exhaust port from the indoor exhaust port via the exhaust air blower and an air supply air path connecting the indoor air supply port via the air supply fan from the outdoor air supply port When installing by installing the inner pipe connecting pipe, the inner pipe connecting pipe and the main body inner pipe and the inner pipe connecting pipe and the hood inner pipe are provided with a recognition means that can recognize that they are connected. It is possible to recognize the connection state of the inner pipe connecting pipe and the main body inner pipe, and the inner pipe connecting pipe and the hood inner pipe, and there is no gap at the connection place, and there is no short circuit between the supply air and the exhaust. It has the effect of becoming a connection. If the inner pipe connection pipe is not connected to the main body inner pipe or the hood inner pipe, the main body cannot be inserted from the indoor side of the wind tunnel pipe and installed on the indoor side wall surface, or the hood communicates with the outdoor side of the wind tunnel pipe. It is equipped with construction leakage prevention means that cannot be installed on the outdoor wall surface, it can be installed without attaching the inner pipe connection pipe, and it can be prevented that a gap is generated in the connection place. It has the effect of being a connection that does not cause a short circuit with the exhaust.

The invention according to claim 2 of the present invention is a detection means for detecting connection / non-connection of the inner pipe connection pipe and the hood inner pipe, and an abnormality notification for notifying an abnormality when the detection means detects non-connection. If the abnormality notification means recognizes that the inner pipe connecting pipe and the hood inner pipe are not connected, the length of the inner pipe connecting pipe was adjusted and the construction was performed again. Thereafter, the connection between the inner pipe connecting pipe and the hood inner pipe can be recognized by detecting the connection between the inner pipe connecting pipe and the hood inner pipe by the detecting means and the abnormality notifying means does not operate. As a result, the connection state of the inner pipe connection pipe and the main body inner pipe, and the inner pipe connection pipe and the hood inner pipe can be recognized, and there is no gap at the connection place, and a short circuit between the supply air and the exhaust occurs. It has the effect of becoming a connection that does not. The exhaust blower is composed of an exhaust fan and an exhaust motor, and the exhaust fan is rotated by rotating the exhaust motor to perform exhaust, and the air supply blower is composed of an air supply fan and an air supply motor. It has a function of rotating the air supply fan by rotation to supply air, and it has a rotation speed detection means for detecting the rotation speed of the exhaust fan and the air supply fan as detection means, and an abnormality notification means on the indoor front side of the main body. When the exhaust fan and the supply fan are operated, the display unit displays an abnormality, and detects that the rotational speed of at least one of the exhaust fan and the supply fan exceeds a certain range. When the inner pipe connecting pipe and the hood inner pipe are not connected, a short circuit occurs between the supply air and the exhaust, which reduces the ventilation resistance of the air supply and exhaust air paths. , Exhaust fan and By detecting the change in the rotation speed of the air supply fan by the rotation speed detection means, and when the rotation speed of at least one of the exhaust fan and the air supply fan exceeds a certain range, an abnormality is displayed on the display unit. Connection between the inner pipe connection pipe and the main body inner pipe and between the inner pipe connection pipe and the hood inner pipe can be recognized, there is no gap in the connection location, and there is no short circuit between the supply air and exhaust. It has the effect of becoming.

According to a third aspect of the present invention, there are provided a plurality of inner dampers erected from the inside of the hood inner tube toward the inside, and a plurality of outer dampers erected from the outer side of the hood inner tube toward the outside. Each of the inner damper and the outer damper has the same damper rotation axis, and the damper rotation axis is provided on the circumference of the hood inner pipe and perpendicular to the axial direction of the hood inner pipe, so that the inner damper When the outer damper is tilted toward the outdoor side around the rotation axis of the damper, the outer damper interlocks and tilts toward the outdoor side, so that the air path formed inside the hood inner pipe and the air path formed outside the hood inner pipe When the inner pipe connecting pipe is inserted into the hood inner pipe, the inner pipe connecting pipe and the inner damper come into contact with each other. The air channel inside the hood tube and the air channel outside the hood tube are opened at the same time by tilting while tilting toward the outdoor side, and the inner tube connection tube and the hood tube are not open. When connected, the inner and outer air passages of the hood pipe are closed, increasing the ventilation resistance of the air supply and exhaust air passages, and detecting the rotational speed change of the exhaust fan and air supply fan. When the rotational speed of at least one of the exhaust fan and the supply fan exceeds a certain range, the inner pipe connection pipe, the main body inner pipe, and the inner pipe connection pipe are displayed by displaying an abnormality on the display unit. The connection state of the pipe in the hood can be recognized, and there is no gap at the connection location, and there is an effect that the connection does not cause a short circuit between the supply air and the exhaust.

Further, the invention according to claim 4 of the present invention is provided with measuring means capable of measuring the distance from the main body inner pipe to the hood inner pipe when the inner pipe connecting pipe is attached, and the inner pipe is determined by the distance measured by the measuring means. When the inner pipe connection pipe is longer than the distance between the main body inner pipe and the hood inner pipe, the distance from the main body inner pipe to the hood inner pipe can be measured by measuring means. Since the inner pipe connection pipe can be cut and adjusted to a length that matches the distance from the main body inner pipe to the hood inner pipe, the inner pipe connection pipe and the main body inner pipe are installed when installing the inner pipe connection pipe. In addition, the inner pipe connecting pipe and the hood inner pipe can be reliably connected, and there is no gap at the connecting portion, and there is an effect that the connection is made such that a short circuit between the supply air and the exhaust does not occur.

Further, the invention according to claim 5 of the present invention includes a cylindrical wind tunnel pipe provided on the wall surface that allows communication between the interior and the exterior, and includes a hood that communicates with the outdoor side of the wind tunnel pipe and is installed on the outdoor wall surface. The hood has an outdoor exhaust port for exhausting air from the room to the outside and an outdoor air supply port for supplying air from the outside to the room. The hood has a hood outer pipe at the connection portion with the wind tunnel pipe. By installing the hood inner pipe on the inside of the hood, separate air passages are formed on the outer side of the hood inner pipe and the inner side of the hood inner pipe, and the main body inserted on the indoor side of the wind tunnel pipe and installed on the indoor side wall surface is A main body outer tube and a main body inner tube inside the main body outer tube, an indoor exhaust port and an exhaust blower for exhausting air from the room, and an indoor air supply port and an air supply blower for supplying air from the outdoor to the room, Equipped with an inner pipe connection pipe that connects the main body pipe and the hood inner pipe. By forming an exhaust air passage that connects the outdoor exhaust port from the indoor exhaust port via the exhaust air blower, and an air supply air passage that connects the indoor air supply port from the outdoor air supply port via the air supply blower. The inner pipe connecting pipe is configured to be stretchable, and the inner pipe connecting pipe is connected to the inner pipe and the hood inner pipe according to the distance between the main pipe and the hood pipe. Since the pipe is shrunk and the length is adjusted, the inner pipe connecting pipe and the main body inner pipe, and the inner pipe connecting pipe and the hood inner pipe can be securely connected when installing and installing the inner pipe connecting pipe, There is no gap at the connection location, and there is an effect that a short circuit between the supply air and the exhaust does not occur.

Further, the invention according to claim 6 of the present invention is provided with a telescopic bellows as a telescopic inner pipe connecting pipe, and a fixing portion that can be fixedly connected to the main body inner pipe and the hood inner pipe. The inner pipe and the hood are constructed by connecting the inner pipe connecting pipe and the main body inner pipe, and the inner pipe connecting pipe and the hood inner pipe with the fixing portion in a state where the inner pipe connecting pipe is extended in advance. Since the length of the inner pipe connecting tube is reduced by adjusting the distance to the inner pipe, the inner pipe connecting pipe and the main body inner pipe, and the inner pipe connecting pipe and the hood inner pipe can be securely connected. There is no gap at the connection location, and there is an effect that a short circuit between the supply air and the exhaust does not occur.

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

(Embodiment 1)
FIG. 1 is a side sectional view showing the structure of a simultaneous supply / exhaust type ventilation fan according to Embodiment 1 of the present invention, and FIG. 2 is a perspective sectional view showing the construction of the simultaneous supply / exhaust type ventilation fan according to Embodiment 1 of the present invention. FIG. 3A is a perspective sectional view showing a state in which the inner damper and the outer damper according to the first embodiment of the present invention are opened, and FIG. 3B shows the inner damper and the outer damper according to the first embodiment of the present invention. FIG. 4 is a side sectional view showing the measuring means according to the first embodiment of the present invention, and FIG. 5 is a sectional view showing the thin portion of the inner pipe connecting pipe according to the first embodiment of the present invention. FIG. 6 is a cross-sectional view showing the attached / detached state of the plurality of inner pipe connecting pipes according to the first embodiment of the present invention.

  As shown in FIG. 1 and FIG. 2, for example, a vinyl chloride pipe (equivalent to a VU pipe nominal diameter of 150) as a wind tunnel pipe 2 is installed in a through hole 1 provided to communicate with the wall surface of a house indoors and outdoors. The main body 3 that is inserted into the wind tunnel pipe 2 and installed on the indoor side wall surface has an indoor exhaust port 4 for exhausting indoor air to the outside on the indoor front surface, and a room for supplying outdoor air to the room indoors. A main body outer tube 6 having an air supply port 5 and inserted into the wind tunnel pipe 2 and having an outer diameter smaller than the inner diameter of the wind tunnel pipe 2 by, for example, 2 to 10 mm, and a diameter of about 80 mm as an example inside the main body outer tube 6 By comprising a double pipe having a substantial inner pipe 7, separate air paths can be formed inside and outside the main body pipe 7, and the inner air path of the main body pipe 7 can be used as the exhaust air path 8. Communicated with the indoor exhaust port 4 and the outside air passage of the body inner tube 7 as the air supply air passage And it communicates with the indoor air supply port 5 as.

  Further, when the main body outer tube 6 is inserted into the wind tunnel pipe 2, for example, rubber packing as a sealing means 10 </ b> A is wound around the outer periphery of the main body outer tube 6 and then inserted into the wind tunnel pipe 2, thereby The gap on the outside of the main body outer tube 6 is sealed by the sealing means 10A.

  An exhaust fan 12 in the shape of, for example, a propeller fan or a turbo fan as an exhaust blower 11 and an AC condenser motor as an exhaust motor 13, for example, are provided inside the main body inner pipe 7 serving as the exhaust air path 8. Exhaust can be performed by rotating the exhaust fan 12.

  The air supply fan 15 includes an air supply fan 15 in the shape of, for example, a propeller fan as an air supply fan 14 and an AC condenser motor as an air supply motor 16 so as to be in series with the outside of the exhaust air blower 11. Is provided with a cylindrical boss portion 17 corresponding to the diameter of the main body inner tube 7, and the inner peripheral side of the boss portion 17 extends in the axial direction. By providing a communicating cavity, even if the air supply fan 15 is rotated by the air supply motor 16, the inner peripheral side of the boss portion 17 passes through the exhaust air as the exhaust air passage 8, while the air supply fan 15 passes through the inside of the main body. The air supply air passage 9 formed outside the pipe 7 can be supplied with air.

  On the other hand, the hood 18 that communicates with the outdoor side of the wind tunnel pipe 2 and is installed on the outdoor wall surface is provided with an outdoor exhaust port 19 that discharges air exhausted from the room on the lower surface, and outdoor air is supplied to the side surface of the hood 18. The outdoor air inlet 20 for taking in is provided.

  In addition, the connecting portion between the wind tunnel pipe 2 and the hood 18 has a hood outer tube 21 whose outer diameter is reduced by, for example, 2 to 10 mm with respect to the inner diameter of the wind tunnel pipe 2, and an inner diameter of the hood outer tube 21 is equivalent to about 80 mm. By forming the double pipe having the hood inner pipe 22, separate air passages can be formed on the inside and outside of the hood inner pipe 22, and the outdoor air outlet is provided with the inner air passage of the hood inner pipe 22 as the exhaust air passage 8. 19, the outside air passage of the hood inner tube 22 is connected to the outdoor air inlet 20 as the air supply air passage 9.

  Further, a gap between the wind tunnel pipe 2 and the hood outer pipe 21 is sealed by the sealing means 10B by interposing a rubber packing as the sealing means 10B, for example, at a connecting portion between the wind tunnel pipe 2 and the hood outer pipe 21. Yes.

  Further, the inner side surface of the hood inner tube 22 is provided with, for example, rubber packing as a short-circuit prevention means 23, and is formed of resin as a tube connecting the main body inner tube 7 and the hood inner tube 22, and has an equivalent diameter of about 75 mm as an example. A cylindrical inner pipe connecting pipe 24 is provided, and the inner pipe connecting pipe 24 and the hood inner pipe 22 are connected to each other by the short-circuit prevention means 23 without any gap, and the exhaust air passage 8 extends from the indoor exhaust port 4 to the outdoor exhaust port 19. The air supply air passage 9 is communicated from the indoor air supply port 5 to the outdoor air supply port 20.

  With the above configuration, as a simultaneous supply / exhaust ventilation fan 25 comprising the wind tunnel pipe 2, the main body 3, the hood 18 and the inner pipe connection pipe 24, ventilation is always performed by supplying and exhausting indoor and outdoor air at the same time. Harmful substances (for example, formaldehyde) can be discharged outside the room to maintain the health of the residents, and by supplying the outdoor air, the air volume of the supply and exhaust can be balanced, It prevents the occurrence of inadequate ventilation due to the airtight situation of the room by preventing a difference in static pressure outside the room.

  In addition, by having a function of temporarily increasing the air volume of the supply air, for example, there is an effect of introducing cool air from the outside air at night in summer to cool the room.

  Therefore, since the outer diameter of the air supply fan 15 can be increased by setting the outer air path of the main body inner tube 7 to the air supply air path 9, the air supply motor 16 can be supplied by increasing the number of rotations of the air supply motor 16. It is easy to increase the air volume, and the blowing efficiency of the supply air blower 14 can be increased.

Here, when the air supply blower 14 and the exhaust air blower 11 are always operated, the air supply and exhaust are ventilated at 30 m ³ / h as an example, and the normal ventilation operation is performed. When the room temperature is 28 ° C. and the outside air temperature is 2 ° C. or more lower than the room temperature, the air supply amount is increased. By supplying air at 60 m ³ / h, which is twice as much, the calorific value at bedtime for one person and the balance of the outside air cooling effect due to the air supply are matched, and there is an effect of suppressing an increase in the room temperature.

  Further, the cross-sectional area of the supply air passage 9 is more than twice the cross-sectional area of the exhaust air passage 8, so that, for example, an air flow that is twice as large as that of the normal ventilation operation can be obtained. The increase in resistance can be reduced, and the blowing efficiency of the supply air blower 14 can be increased.

  Also, as an example, the inner pipe connecting pipe 24 is a separate part. The wall thickness varies depending on the house, so that the inner pipe corresponds to the wall thickness where the simultaneous supply / exhaust ventilation fan 25 is installed during construction. This is because it is necessary to adjust the length of the connecting pipe 24, so that the inner pipe connecting pipe 24 is made a single pipe, thereby improving the handleability and making it easy to adjust the length. However, the wall thickness to be installed is always constant, and it is not necessary to adjust the length of the inner pipe connecting pipe 24, or the inner pipe connecting pipe 24 can be expanded and contracted, so that the length can be easily adjusted. In this case, the inner pipe connecting pipe 24 may not necessarily be a separate part but may be configured to be coupled to the main body inner pipe 7 or the hood inner pipe 22.

  Here, as an example, the wind tunnel pipe 2 is a separate part, but the wind tunnel pipe 2 may be omitted by connecting the main body outer tube 6 and the hood outer tube 21.

  Next, the construction of the simultaneous supply / exhaust ventilation fan 25 will be described.

  Generally, after the wind tunnel pipe 2 is installed in the through hole 1 provided in the wall surface of the house, the hood 18 is installed outside the wind tunnel pipe 2, and finally the main body 3 and the inner pipe connection pipe 24 are connected to the wind tunnel pipe 2. Since the inner pipe connecting pipe 24 and the main body inner pipe 7 and the inner pipe connecting pipe 24 and the hood inner pipe 22 are connected inside the wind tunnel pipe 2, the connection state is visually recognized. I can't.

  Therefore, in the first embodiment of the present invention, the inner pipe connection pipe 24 is connected to the main body inner pipe 7 as a recognition means (not shown) for recognizing the connection state between the main body inner pipe 7 and the inner pipe connection pipe 24. A holding portion 28 having a cylindrical groove portion 27 is provided so that the groove portion 27 can be held. As an example, the outer diameter of the groove portion 27 is 2 mm or more larger than the outer diameter of the inner tube connecting pipe 24, and the inner surface of the groove portion 27 is the entrance of the groove portion 27. The inner diameter on the inlet side of the groove 27 is made smaller by about 2 to 5 mm than the inner diameter of the inner pipe connecting pipe 24, and the inner diameter on the inner side of the groove 27 is made smaller. When the inner pipe connecting pipe 24 is inserted into the groove 27 by being about 1 to 2 mm larger than the inner diameter, the inner side of the groove 27 and the inner side of the inner pipe connecting pipe 24 are held while being fitted with no gap.

  As a result, the inner tube connection pipe 24 is connected to and held by the holding portion 28 of the main body inner tube 7 before the main body 3 is inserted from the indoor side of the wind tunnel pipe 2, so that the connection state can be recognized visually or by touch. it can.

  In addition, after the inner pipe connecting pipe 24 is connected to and held by the holding portion 28, a recognition means (not shown) is inserted from the indoor side of the wind tunnel pipe 2 to recognize the connection state between the inner pipe connecting pipe 24 and the hood inner pipe 22. The outer diameter of the inner pipe connecting pipe 24 is made smaller by, for example, about 2 to 5 mm than the inner diameter of the hood inner pipe 22 so that the inner pipe connecting pipe 24 is inserted into the hood inner pipe 22. 22 is provided with a circumferential rib 30 as a cognitive sound generating mechanism 29, and the inner diameter of the rib 30 is made smaller than the outer diameter of the inner pipe connecting pipe 24 by, for example, about 1 mm, so that the inner pipe connecting pipe is connected to the hood inner pipe 22. When 24 is inserted, the rib 30 and the inner pipe connecting pipe 24 interfere to generate a recognition sound, whereby the connection state between the inner pipe connecting pipe 24 and the hood inner pipe 22 can be recognized by hearing.

  Further, by arranging a plurality of ribs 30 in the axial direction, the rib 30 and the inner pipe connecting pipe 24 repeatedly interfere with each other as the inner pipe connecting pipe 24 is inserted into the hood inner pipe 22. Resistance is repeatedly applied, and the connection state can be recognized by tactile sensation by the change in resistance when the inner tube connecting tube 24 is inserted into the hood inner tube 22.

  Thereby, when constructing, there is no gap in the connecting portion between the inner pipe connecting pipe 24 and the main body inner pipe 7 and between the inner pipe connecting pipe 24 and the hood inner pipe 22, and the supply air passage 9 and the exhaust air passage 8. Therefore, there is an effect that the indoor and outdoor ventilation can be reliably performed.

  Furthermore, in order to improve workability, the end surface of the hood inner tube 22 is provided with a tapered portion 31 having a gradient of 30 degrees with respect to the axial direction as an example in which the inner diameter increases toward the end surface of the hood inner tube 22. Thus, when the inner pipe connection pipe 24 is inserted from the indoor side of the wind tunnel pipe 2, the inner pipe connection pipe 24 is guided to the inside of the hood inner pipe 22 by the tapered portion 31 provided on the end surface of the hood inner pipe 22. Therefore, by preventing the misalignment between the inner tube connecting pipe 24 and the hood inner tube 22, the inner tube connecting tube 24 and the hood inner tube 22 can be reliably connected.

  Further, as another means, the gap amount A between the inner pipe connecting pipe 24 and the hood inner pipe 22, the gap amount B between the main body outer pipe 6 and the wind tunnel pipe 2, and the gap amount C between the hood outer pipe 21 and the wind tunnel pipe 2 are used. If the relationship of A> B + C is satisfied, even if the main body outer tube 6 and the wind tunnel pipe and the hood outer tube and the wind tunnel pipe 2 are installed eccentrically, the gap amount B is the maximum. Since the sum of the gap amount C is eccentric, the inner pipe is surely connected to the inner pipe 22 by making the gap amount A between the inner pipe connecting pipe 24 and the hood inner pipe 22 larger than the sum of the gap quantity B and the gap quantity C. When the connecting pipe 24 is inserted, and the inner pipe connecting pipe 24 is inserted from the indoor side of the wind tunnel pipe 2, the inner pipe connecting pipe 24 and the hood inner pipe 22 can be reliably connected.

  In addition, as shown in FIG. 2, when the length of the inner pipe connecting pipe 24 is shorter than the distance between the main body inner pipe 7 and the hood inner pipe 22, the inner pipe connecting pipe 24 and the hood inner pipe 22 are not connected. In order to prevent the short circuit between the supply air passage 9 and the exhaust air passage 8, a detection means for detecting the connection and disconnection of the inner pipe connection pipe 24 and the hood inner pipe 22 is provided. An air supply fan rotation speed detection means 33 (a rotary encoder) as an example (not shown) and an exhaust fan rotation speed detection means 34 (a rotary encoder as an example) are provided, and display as an abnormality notification means (not shown) By providing, for example, a microcomputer as a control unit 37 that includes a unit 36 (an LED lamp as an example) and receives a rotation number signal from the supply fan rotation number detection unit 33 and the exhaust fan rotation number detection unit 34. If 15 and at least one rotational speed of the exhaust fan 12 exceeds a certain range is intended to inform the abnormality on the display section 36 by the control unit 37.

  Here, when the inner pipe connection pipe 24 and the hood inner pipe 22 are not connected, the supply air path 9 and the exhaust air path 8 are short-circuited. The ventilation resistance of the air path 8 decreases. Therefore, when the fan shape of the supply fan 15 and the exhaust fan 12 is a propeller fan, the rotational speed is increased by reducing the ventilation resistance, and when the fan shape is a turbo fan, the ventilation resistance is reduced. Since the rotational speed is reduced by the above, it is possible to detect the presence or absence of a short circuit between the supply air passage 9 and the exhaust air passage 8 by detecting changes in the rotational speed of the supply fan 15 and the exhaust fan 12. The short circuit between the passage 9 and the exhaust air passage 8 can be prevented, and the indoor and outdoor ventilation can be reliably performed.

  Further, the range of the rotational speed varies depending on the supply air and exhaust air volume, the fan shape, and the motor characteristics, so it is desirable to appropriately determine by examining each condition.

  Also, as shown in FIGS. 3A and 3B, a triangular plate-shaped inner damper 38 standing from the inside of the hood inner tube 22 toward the inside, and from the outside of the hood inner tube 22 to the outside A rectangular plate-like outer damper 39 erected toward the inner side, and the inner damper 38 and the outer damper 39 are the same damper on the circumference of the hood inner tube 22 and perpendicular to the axial direction of the hood inner tube 22 A rotating shaft 40 is provided, and an inner damper 38 and an outer damper 39 are paired, and a plurality of them are arranged at equal intervals on the circumference of the hood inner tube 22. Further, as shown in FIG. 3A, the operations of the inner damper 38 and the outer damper 39 are performed when the exhaust air passage 8 is closed by the plurality of inner dampers 38 when no external force is generated in the inner damper 38. The air supply passage 9 is partially closed by the outer damper 39, but as shown in FIG. 3B, when the inner pipe connecting tube 24 comes into contact with the inner damper 38, the inner damper 38 is moved around the damper rotating shaft 40. The inner pipe connecting pipe 24 is inserted into the hood inner pipe 22 while falling toward the outdoor side, and the outer damper 39 falls to the outdoor side in accordance with the inner damper 38, so that the inclination angles of the inner damper 38 and the outer damper 39 are desirably 90. By making it along the inner pipe 22 of the hood, the cross-sectional areas of the exhaust air passage 8 and the supply air passage 9 are made as narrow as possible. That.

  Thus, when the hood inner pipe 22 and the inner pipe connecting pipe 24 are not connected, the exhaust air passage 8 is closed by the inner damper 38 and the supply air passage 9 is closed by the outer damper 39. The ventilation resistance of the exhaust air passage 8 increases.

  Therefore, when the fan shape of the air supply fan 15 and the exhaust fan 12 is a propeller fan, the rotational speed is reduced by increasing the ventilation resistance, and when the fan shape is a turbo fan, the ventilation resistance is increased. Therefore, by detecting changes in the rotation speeds of the supply fan 15 and the exhaust fan 12, it is possible to detect the presence or absence of a short circuit between the supply air path 9 and the exhaust air path 8. 9 and the exhaust air passage 8 can be prevented from being short-circuited, and the indoor and outdoor ventilation can be reliably performed.

  Further, the range of the rotational speed varies depending on the supply air and exhaust air volume, the fan shape, and the motor characteristics, so it is desirable to appropriately determine by examining each condition.

  Further, when the length of the inner pipe connecting pipe 24 is longer than the distance between the main body inner pipe 7 and the hood inner pipe 22, the distance between the main body inner pipe 7 and the hood inner pipe 22 is set by a measuring means (not shown). It is also possible to adjust them together.

  Here, as shown in FIG. 4, a convex positioning plate 42 is provided inside the hood inner tube 22 as a measuring means (not shown), and the inner tube connecting pipe 24 is inserted into the hood inner tube 22. Then, the inner pipe connecting pipe 24 and the positioning plate 42 are in contact with each other, the inner pipe connecting pipe 24 is positioned in the axial direction, and the surface of the main body outer pipe 6 is provided with a vertical stripe pattern in increments of, for example, 10 mm. As a result, the length of the inner pipe connecting pipe 24 can be easily adjusted because the unnecessary length of the inner pipe connecting pipe 24 can be measured by measuring the length of the main pipe outer pipe 6 from the indoor side wall surface. When the inner pipe connecting pipe 24 is installed and constructed, the inner pipe connecting pipe 24 and the main body inner pipe 7 and the inner pipe connecting pipe 24 and the hood inner pipe 22 can be reliably connected, and a gap is generated at the connection location. Connection that does not cause short circuit between air supply and exhaust It, there is an effect that can be reliably ventilated indoors and outdoors.

  Further, when the length of the inner pipe connecting pipe 24 is cut and adjusted as shown in FIG. 5, the inner pipe connecting pipe 24 is provided with a plurality of circumferential thin portions 44, for example, in 10 mm increments. In addition to being easy to cut, the cutting surface can be cut perpendicular to the axial direction, and when the inner tube connecting tube 24 is inserted into the hood inner tube 22, the inner surface of the hood inner tube 22 is connected to the inner tube. An effect that the overlapping portion with the outer surface of the pipe 24 can be secured, there is no gap at the connection location, and a short circuit between the supply air and the exhaust does not occur, and the indoor and outdoor ventilation can be reliably performed. There is.

  Here, when the thickness of the inner pipe connecting pipe 24 is 100%, the thin portion 44 is easily cut because the blade is easily applied to the thin portion 44 by setting the thickness to 50% or less. Can do.

  In addition, as shown in FIG. 6, as a means for adjusting the length of the inner pipe connecting pipe 24, there is a method of connecting a plurality of inner pipe connecting pipes 24, and one end face of each inner pipe connecting pipe 24 is provided. Is provided with a cylindrical female portion 45 having an outer diameter that is, for example, about 2 mm larger than the outer diameter of the inner tube connecting pipe 24, and a male end having an outer diameter that is, for example, about 2 mm smaller than the inner diameter of the female portion 45. By providing the portion 46, the length of the inner tube connecting pipe can be adjusted by fitting the female portion 45 and the male portion 46 together so that the inner tube connecting tube 24 can be detached. The end face of the inner pipe connecting pipe 24 is perpendicular to the axial direction, and therefore, when the inner pipe connecting pipe 24 is inserted into the hood inner pipe 22, the inner pipe connecting pipe 24 is inserted into the hood inner pipe 22. The overlapping portion of the inner side surface and the outer side surface of the inner pipe connecting pipe 24 is Can holding, without a gap in the connection points takes place, becomes a connection circuit between the exhaust and supply air does not occur, there is an effect that it is possible to reliably perform ventilation of the room and the outdoor.

(Embodiment 2)
In the second embodiment of the present invention, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the second embodiment of the present invention, the inner pipe connecting pipe 24 is constructed by inserting the main body 3 into the wind tunnel pipe 2 from the indoor side without connecting the inner pipe connecting pipe 24 to the holding portion 28 of the main body inner pipe 7. An example of construction leakage prevention means (not shown) for preventing leakage will be described.

  FIG. 7 is a perspective sectional view showing a detection mechanism and a stopper mechanism according to the second embodiment of the present invention, and FIG. 8A shows a state in which the inner pipe connecting pipe is detected by the detection mechanism according to the second embodiment of the present invention. FIG. 8B is a cross-sectional view showing a state in which the inner pipe connecting pipe is not detected by the detection mechanism of the second embodiment of the present invention, and FIG. 9A is a view of holding of the second embodiment of the present invention. It is sectional drawing which shows the state of a link member when an inner pipe connecting pipe is not connected to a part, FIG.9 (b) is a link when an inner pipe connecting pipe is connected to the holding | maintenance part of Embodiment 2 of this invention. It is sectional drawing which shows the state of a member.

  As shown in FIG. 7, as an example of construction leakage prevention means (not shown), a semicircular interference plate 48 provided on the outer periphery of the hood inner tube 22 and slidable in the axial direction is installed. Includes a plate-like member 52 having a detection mechanism rotating shaft 50 as a detection mechanism 49 for detecting the insertion of the inner pipe connection pipe 24 and a claw portion 51 protruding toward the inside of the interference plate 48, For example, a tension spring is provided as a spring 53 in which one end is connected to the interference plate 48 and the other end is connected to the plate-like member 52 in order to apply a pulling force so that the claw portion 51 is raised. A stopper mechanism 54 for regulating one end protrudes to the inside of the interference plate 48, and the other end is rotatably connected to the detection mechanism 49. As shown in FIG. Inner pipe connection pipe 2 in claw 51 Contact with each other, the plate member 52 is tilted to the outdoor side around the rotation shaft 50 of the detection mechanism, and at the same time, the stopper 55 as the stopper mechanism 54 is interlocked to release the restriction on the sliding operation of the interference plate. In this case, the interference plate 48 is slid while being in contact with the inner tube 7. On the other hand, as shown in FIG. 8B, when the construction is performed without attaching the inner pipe connecting pipe 24, the interference plate 48 is moved in the axial direction by the stopper mechanism 54 even if the inner pipe 7 and the interference plate 48 come into contact with each other. Since it is restricted, it cannot be slid, and when the main body 3 is inserted from the indoor side of the wind tunnel pipe 2, the main body 3 cannot be installed on the side wall of the indoor wall, and the hood 18 is outside the outdoor side of the wind tunnel pipe 2. The main body 3 or the hood 18 cannot be installed so as to be in close contact with the wall surface, so that the inner pipe connecting pipe 24 is not attached without being installed, and there is a gap at the connection location. It is possible to prevent a short circuit between the supply air and the exhaust.

  Further, as another example of the construction leakage prevention means (not shown), as shown in FIGS. 9A and 9B, a contact portion that comes into contact when the inner tube connection pipe 24 is inserted into the holding portion 28. 56 and a link member 58 having an interference portion 57 extending in a long shape toward the outside of the main body outer tube 6, and the link member 58 is near the lower side of the holding portion 28 with respect to the axial direction of the main body inner tube 7. By providing the vertical link rotation shaft 59, when the contact portion 56 does not contact the inner tube connecting pipe 24, the interference portion 57 protrudes toward the outer periphery of the main body outer tube 6, and the contact portion 56 becomes the inner tube connecting tube 24. 9 is configured such that the contact portion 56 and the interference portion 57 rotate around the link rotation shaft 59 so that the interference portion 57 is accommodated inside the main body outer tube 6, as shown in FIG. When installing without connecting the inner pipe connecting pipe 24 to the holding part 28, Since the interference part 57 protrudes toward the outer periphery of the pipe 6, when the main body 3 is inserted into the wind tunnel pipe 2 from the indoor side, the interference part 57 comes into contact with the wind tunnel pipe 2 and the main body 3 can be inserted into the wind tunnel pipe 2. Disappear. On the other hand, as shown in FIG. 9B, when the inner pipe connecting pipe 24 is connected to the holding part 28, the interference part 57 is accommodated inside the main body outer pipe 6, so that the main body 3 is moved from the indoor side to the wind tunnel pipe 2. Can be inserted and installed. Therefore, the main body 3 is not inserted into the wind tunnel pipe 2 from the indoor side without the inner pipe connecting pipe 24 being attached, and it is possible to prevent the supply air and the exhaust from being short-circuited due to a gap at the connection location. .

(Embodiment 3)
In the third embodiment of the present invention, the same parts as those in the first and second embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the third embodiment of the present invention, an example in which the inner pipe connecting pipe 24 is configured to be extendable and retractable will be described.

  FIG. 10 is a side sectional view showing the configuration of the telescopic slide tube according to the third embodiment of the present invention, and FIG. 11 is a side sectional view showing the configuration of the telescopic bellows and fixing portion according to the third embodiment of the present invention. is there.

  As shown in FIG. 10, the inner pipe connecting pipe 24 combines a plurality of ducts 60 having different outer diameters, and one end face of each duct 60 is provided with a circumferential outer flange 61 directed outwardly, The end face of the other end is provided with a circular inner flange 62 facing inward so that when the duct 60 is fitted, the outer flange 61 and the inner flange 62 interfere with each other so that the duct 60 does not come off. The duct 60 is slidable and can be expanded and contracted, and the inner pipe connection pipe 24 is preliminarily stretched so that the inner pipe connection can be made according to the distance between the main body inner pipe 7 and the hood inner pipe 22. Since the pipe 24 is contracted and the length is adjusted, the inner pipe connecting pipe 24 and the main body inner pipe 7 and the inner pipe connecting pipe 24 and the hood inner pipe 22 are securely connected when the inner pipe connecting pipe 24 is attached and installed. Can be connected, without a gap in the connection points takes place, becomes a connection circuit between the exhaust and supply air does not occur, there is an effect that it is possible to reliably perform ventilation of the room and the outdoor.

  As another example, the inner pipe connecting pipe 24 is provided with a telescopic bellows 63 and a fixing portion 64 that can fix and connect the main body inner pipe 7 and the hood inner pipe 22 and is fixed. As the portion 64, a projection 65 is provided inside the hood inner tube 22, and a key-shaped slit 66 larger than the width of the projection 65 is provided on the outdoor side end surface of the inner tube connection tube 24. When fixing the hood inner tube 22 to the hood inner tube 22, the projection 65 of the hood inner tube 22 and the slit 66 of the inner tube connecting tube 24 are inserted after being aligned, and then the inner tube connecting tube 24 is rotated to thereby lock the key. The protrusion 65 is fitted into the slit 66 and is positioned and fixed. On the other hand, the connection between the main body inner pipe 7 and the inner pipe connection pipe 24 is configured to be held and fixed while being connected by the holding portion 28 provided in the main body inner pipe 7.

  Thereby, with the inner pipe connecting pipe 24 extended in advance, the inner pipe connecting pipe 24 and the main body inner pipe 7 are connected by the holding part 28, and the inner pipe connecting pipe 24 and the hood inner pipe 22 are connected by the fixing part 64. After that, the main body 3 is inserted into the wind tunnel pipe 2 from the indoor side, and the construction is performed, so that the length of the bellows 63 of the inner pipe connecting pipe 24 is reduced according to the distance between the main body inner pipe 7 and the hood inner pipe 22. Therefore, the inner pipe connecting pipe 24 and the main body inner pipe 7 and the inner pipe connecting pipe 24 and the hood inner pipe 22 can be reliably connected, and there is no gap at the connection place, and the supply and exhaust air The connection is such that no short circuit occurs, and there is an effect that indoor and outdoor ventilation can be reliably performed.

  It can be easily applied as a use of a ventilation fan that forms two independent air passages by a double pipe and ventilates, and can also be applied to a use of connecting double pipes in a closed space.

Side surface sectional drawing which shows the structure of the simultaneous supply / exhaust type ventilation fan of Embodiment 1 of this invention Cross-sectional perspective view showing the construction of the main body of the same simultaneous supply / exhaust ventilation fan The figure which shows the state of the inner side damper and an outer side damper ((a) The perspective sectional view which shows the state which the inner side damper and the outer side damper opened, (b) The perspective sectional view which shows the state which the inner side damper and the outer side damper closed) Side sectional view showing the measuring means Sectional view showing the thin part of the inner pipe connection pipe Sectional drawing which shows the attachment or detachment state of the multiple inner pipe connection pipes A perspective sectional view showing a detection mechanism and a stopper mechanism according to Embodiment 2 of the present invention. The figure which shows the state of detection of the inner pipe connection pipe by the same detection mechanism ((a) The cross section which shows the state where the inner pipe connection pipe was detected by the same detection mechanism, (b) The inner pipe connection pipe is detected by the same detection mechanism Cross-sectional view showing the state of not being done) (A) Cross-sectional view showing the state of the link member when the inner pipe connecting pipe is not connected to the holding part (b) Cross-sectional view showing the state of the link member when the inner pipe connecting pipe is connected to the holding part Side surface sectional view which shows the structure of the extendable slide tube of Embodiment 3 of this invention Side sectional view showing the configuration of the telescopic bellows and the fixing part Sectional drawing which shows an example of the ventilator using the conventional double pipe

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 Wind tunnel pipe 3 Main body 4 Indoor exhaust port 5 Indoor air inlet 6 Main body outer tube 7 Main body pipe 8 Exhaust air path 9 Air supply air path 11 Exhaust air blower 12 Exhaust fan 13 Exhaust motor 14 Supply air blower 15 Supply air fan 16 Supply air Motor 18 Hood 19 Outdoor exhaust port 20 Outdoor air supply port 21 Hood outer tube 22 Hood inner tube 23 Short-circuit prevention means 24 Inner tube connection tube 25 Simultaneous supply / exhaust ventilation fan 28 Holding unit 29 Cognitive sound generating mechanism 31 Taper unit 33 Air supply fan Rotation speed detection means 34 Exhaust fan rotation speed detection means 36 Display section 38 Inner damper 39 Outer damper 40 Damper rotation shaft 42 Positioning plate 43 Scale 44 Thin portion 45 Female portion 46 Male portion 48 Interference plate 49 Detection mechanism 54 Stopper mechanism 56 Contact portion 57 Interference part 58 Link member 59 Link rotation shaft 60 Duct 61 Outer flange 6 The inner flange 63 bellows 64 fixed unit

Claims (6)

A cylindrical wind tunnel pipe provided on the wall surface that communicates with the outside of the room is provided. The wind tunnel pipe communicates with the outdoor side of the wind tunnel pipe, and includes a hood installed on the outdoor wall surface. The hood exhausts air from the room to the outside of the room. And an outdoor air supply port for supplying air from the outside to the room. The hood includes a hood outer pipe at a connection portion with the wind tunnel pipe, and a hood inner pipe inside the hood outer pipe. Accordingly, separate air passages are formed on the outside of the hood inner pipe and the inside of the hood inner pipe, and the main body inserted from the indoor side of the wind tunnel pipe and installed on the indoor side wall surface is formed of a main body outer pipe and A main body inner pipe is provided inside the main body outer pipe, an indoor exhaust port and an exhaust blower for exhausting air from the room, an indoor air supply port and an air supply blower for supplying air from the outside to the room, and the main body inner pipe. And the inner pipe connecting the inner pipe of the hood By providing a pipe, an exhaust air passage connecting the outdoor exhaust port from the indoor exhaust port via the exhaust air blower, and a supply air connecting the indoor air supply port from the outdoor air supply port via the air supply fan It is configured to ventilate by forming an air duct, and includes a recognition means that can recognize that the main body inner pipe and the hood inner pipe are connected by the inner pipe connecting pipe when the inner pipe connecting pipe is attached ,
When the inner pipe connecting pipe is not connected to the main body inner pipe or the hood inner pipe, the main body cannot be inserted from the indoor side of the wind tunnel pipe and installed on the indoor side wall surface, or the hood is not connected to the wind tunnel pipe. A simultaneous supply / exhaust type ventilation fan provided with construction leakage prevention means that is configured to communicate with the outdoor side and cannot be installed on the outdoor side wall surface . A detection means for detecting connection between the inner pipe connection pipe and the hood inner pipe, non-connection, and an abnormality notification means for notifying abnormality when detecting the non-connection by the detection means ,
The exhaust blower is configured by an exhaust fan and an exhaust motor, and has a function of performing exhaust by rotating the exhaust fan by rotation of the exhaust motor, and the air supply blower is configured by an air supply fan and an air supply motor, The air supply motor has a function of supplying air by rotating the air supply motor, and includes a rotation speed detection means for detecting the rotation speed of the exhaust fan and the supply fan as the detection means, and the abnormality As an informing means, a display unit for displaying an abnormality on the front side on the indoor side of the main body is provided, and when the exhaust fan and the air supply fan are operated, the rotation speed of at least one of the exhaust fan and the air supply fan is constant. If it is detected that exceeds the range, according to claim 1 Symbol mounting the hourly discharge type ventilator was set to display the abnormality on the display unit. A plurality of inner dampers standing from the inside of the hood inner pipe toward the inside, and a plurality of outer dampers standing from the outer side of the hood inner pipe toward the outside, each of the inner damper and the outer damper being Having the same damper rotation axis, the damper rotation axis being provided on the circumference of the hood inner tube and perpendicular to the axial direction of the hood inner tube, so that the inner damper is centered on the damper rotation axis When the outer damper is inclined toward the outdoor side, the outer damper is interlocked and inclined toward the outdoor side, whereby the air path formed inside the hood inner pipe and the air path formed outside the hood inner pipe are simultaneously formed. When the inner pipe connecting pipe is inserted into the hood inner pipe, the inner pipe connecting pipe and the inner damper are in contact with each other, and the inner damper is inclined toward the outdoor side. The hourly discharge type ventilator also to the outer damper according to claim 2, wherein was set to open the air path outside the inner air passage and the hood inner tube of the hood inner pipe simultaneously by inclined toward the outdoor side . 2. A measuring means capable of measuring the distance from the main body inner pipe to the hood inner pipe when the inner pipe connecting pipe is attached, and adjusting the length of the inner pipe connecting pipe according to the distance measured by the measuring means. The simultaneous supply / exhaust type ventilation fan as described in any one of thru | or 3 . The simultaneous supply / exhaust ventilation fan according to any one of claims 1 to 4 , wherein the inner pipe connecting pipe is configured to be extendable and contractible. The simultaneous supply / exhaust type exhaust fan according to claim 5 , further comprising: a telescopic bellows as a telescopic inner pipe connecting pipe, and a fixing portion capable of fixing the connection between the main body inner pipe and the hood inner pipe.

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