JP2014092290A - Ventilation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ventilation device capable of improving stability in controlling an air volume.SOLUTION: A ventilation device includes: an air supply fan 3SA; and an exhaust fan 3EA for sucking the air and blowing out the same. The air supply fan 3SA and the exhaust fan 3EA include: an impeller 30 rotation-driven; a fan case 31 provided with a fan case air trunk 31c generating airflow of blowing-out of the air sucked from a fan suction portion from a fan blowout port 31b by rotation-driving the impeller 30; and an air volume detection sensor 32 disposed on the fan case 31 and detecting an air volume of the air passing through the fan case air trunk 31c.

Description

  The present invention relates to a ventilator including a fan that generates an air flow when an impeller is driven to rotate.

  Conventionally, a ventilator that exhausts indoor air using a fan, and also can supply fresh air (outside air) whose temperature is adjusted by exchanging heat between the outside air and indoor air. A heat exchange type ventilation device is proposed.

  Further, there has been proposed a technique in which a duct joint is provided with a sensor for detecting an air volume in a ventilation device that exhausts only indoor air. (For example, refer to Patent Document 1).

JP 2008-45756 A

  In a configuration in which a duct joint to which the duct is connected is provided with a sensor for detecting the air volume, the fan and the sensor are independent components and are attached to members constituting the air path, so the air path between the fan and the sensor. There are many factors that cause the air volume to fluctuate, such as the mounting position of the fan and sensor varies from device to device due to errors in the mounting position of the fan and sensor, which may reduce the stability of air flow control. there were.

  In addition, when a structural member such as a heat exchange element is arranged between the fan and the sensor, the structure having a sensor for detecting the air volume at the duct joint to which the duct is connected may cause an error in the air path length and the mounting position. Further, there is a risk that the stability of the air flow control is further reduced due to the additional factor that the air flow fluctuates.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a ventilator capable of improving the stability of air volume control.

  In order to solve the above-described problem, the present invention includes a blower that sucks and blows out air, and the blower is driven by rotation, and the air sucked from the suction portion is driven by the rotation of the impeller. An air passage forming means in which an air flow is generated to generate an air flow that blows out from the blowing portion, and a detection that is provided in the air passage forming means and detects the air flow through the air passage formed by the air passage forming means And a ventilation device.

  In the ventilator according to the present invention, the air volume, the wind speed, and the like due to the flow of air generated by the blower are detected by the detecting means provided in the air passage forming means that forms the air passage by the blower.

  According to the ventilator of the present invention, the arrangement of the air blower and the detection means can be brought close to each other, the positional relationship between the air blower and the detection means is stabilized, and the stability of control of the air volume and the like is improved.

It is front sectional drawing which shows an example of the air path structure of the heat exchange type | mold ventilation apparatus of this Embodiment. It is side surface sectional drawing which shows an example of the air path structure of the heat exchange type | mold ventilation apparatus of this Embodiment. It is side surface sectional drawing which shows an example of the air path structure of the heat exchange type | mold ventilation apparatus of this Embodiment. It is a front view which shows an example of the external appearance structure of the heat exchange type | mold ventilation apparatus of this Embodiment. It is a top view which shows an example of the external appearance structure of the heat exchange type | mold ventilation apparatus of this Embodiment. It is a side view which shows an example of the air supply fan and exhaust fan of this Embodiment. It is a perspective view which shows an example of the air supply fan and exhaust fan of this Embodiment. It is a block diagram which shows an example of the control function of the heat exchange type | mold ventilation apparatus of this Embodiment. It is a typical block diagram which shows an example of the building in which the heat exchange type | mold ventilation apparatus of this Embodiment is installed.

  Hereinafter, a heat exchange type ventilator as an embodiment of the ventilator of the present invention will be described with reference to the drawings.

<Overall configuration example of the heat exchange type ventilator of the present embodiment>
FIG. 1 is a front cross-sectional view showing an example of the air path configuration of the heat exchange type ventilator of the present embodiment, and FIG. 2 is a side cross section showing an example of the air path configuration of the heat exchange type ventilator of the present embodiment. 3 and 3 are side cross-sectional views showing an example of the air path configuration of the heat exchange type ventilator of the present embodiment. FIG. 4 is a front view showing an example of the external configuration of the heat exchange type ventilator according to the present embodiment, and FIG. 5 is a top view showing an example of the external configuration of the heat exchange type ventilator of the present embodiment. is there.

  1 A of heat exchange type ventilators of this Embodiment are used with the form with which the apparatus main body 10 is installed in the floor of a building. 1 A of heat exchange type | mold ventilation apparatuses equip the apparatus main body 10 with the heat exchange element 2 which performs heat exchange between the external air OA sucked from the outdoors and the return air RA sucked from the room.

  In addition, the heat exchange type ventilation device 1A sucks outside air OA from the outside, and the air supply fan 3SA that blows out the outside air OA heat-exchanged with the return air RA by the heat exchange element 2 into the room as the supply air SA is provided in the apparatus body 10. Prepare.

  Furthermore, the heat exchange type ventilation apparatus 1A includes an exhaust fan 3EA in the apparatus main body 10 that sucks the return air RA from the room and blows the return air RA heat-exchanged with the outside air OA by the heat exchange element 2 to the outside as the exhaust EA. .

  The heat exchanging ventilator 1A has a structure in which an air inlet and an air outlet are formed on the upper surface of the apparatus body 10, and an outside air inlet 10OA from which outside air OA is sucked from outside and an air supply SA to the room blow out. The air supply outlet 10SA is provided on the upper surface of the apparatus main body 10. Further, the heat exchange type ventilator 1 </ b> A includes a return air inlet 10 </ b> RA through which indoor return air RA is sucked and an exhaust outlet 10 </ b> EA through which exhaust EA to the outside is blown out on the upper surface of the apparatus body 10.

  In this example, the heat exchange ventilator 1A has a return air inlet 10RA and an air supply outlet 10SA provided in parallel with the upper surface on the front side of the apparatus body 10, and an outside air inlet 10OA and an exhaust outlet 10EA. The main body 10 is provided in parallel with the upper surface on the back side.

  Further, in the heat exchange type ventilator 1A, the return air inlet 10RA and the outside air inlet 10OA are provided on the left side when the apparatus main body 10 is viewed from the front, and the air supply outlet 10SA and the exhaust outlet 10EA are provided in the apparatus main body 10. Is provided on the right side when viewed from the front.

  In the heat exchange type ventilator 1A, the RA duct joint 11RA is attached to the return air suction port 10RA, and the OA duct joint 11OA is attached to the outside air suction port 10OA. In the heat exchange ventilator 1A, the SA duct joint 11SA is attached to the supply air outlet 10SA, and the EA duct joint 11EA is attached to the exhaust air outlet 10EA.

  1A of heat exchange type | mold ventilation apparatuses are attached to the inner side of the housing | casing 11 comprised with the metal etc., and the air-path formation member 12 comprised with the material which has airtightness and heat insulation property, and a polystyrene foam in this example is attached, A main body 10 is configured.

  In the heat exchanging ventilator 1A, a heat exchanging element mounting portion 13 to which the heat exchanging element 2 is mounted is provided near the center when the apparatus main body 10 is viewed from the front. In the heat exchange type ventilator 1 </ b> A, a space is provided in the air passage forming member 12 to form the heat exchange element attachment portion 13, and the heat exchange element 2 is attached to the air passage forming member 12 of the apparatus body 10.

  1 A of heat exchange type ventilation apparatuses equip the heat exchange element 2 and the heat exchange element attachment part 13 with the structure by which the heat exchange element 2 attached to the heat exchange element attachment part 13 is supported so that a movement in the front-back direction is possible. The heat exchange type ventilation device 1A is configured so that the heat exchange element 2 can be detached from the front side of the device body 10 by moving in the front-rear direction by removing the front plate 11a of the housing 11.

  In the heat exchange type ventilator 1A, an air supply fan attachment portion 14SA to which an air supply fan 3SA is attached is provided on the side of the heat exchange element 2 when the apparatus body 10 is viewed from the front, in this example, on the upper side on the right side. It is done. Further, in the heat exchange type ventilator 1A, the exhaust fan attachment portion 14EA to which the exhaust fan 3EA is attached has a side of the heat exchange element 2 that is the same as the air supply fan attachment portion 14SA when the apparatus main body 10 is viewed from the front, in this example. It is provided at the lower part on the right side.

  The heat exchange type ventilator 1 </ b> A has an air supply fan mounting portion 14 </ b> SA formed in the upper side portion of the air passage forming member 12 with a space between the housing 11 and the lower portion of the air passage forming member 12. The exhaust fan mounting portion 14EA is formed by providing a space between the casing 11 and the air supply fan 3SA and the exhaust fan 3EA are mounted on the apparatus main body 10.

  1 A of heat exchange type | mold ventilation apparatuses equip the supply air fan 3SA and the supply air fan attachment part 14SA with the structure by which the supply air fan 3SA attached to the supply air fan attachment part 14SA is supported so that a movement in the front-back direction is possible. The heat exchange ventilator 1A is configured such that the air supply fan 3SA can be detached from the front side of the apparatus body 10 by moving in the front-rear direction by removing the front plate 11a of the housing 11.

  Further, the heat exchange type ventilator 1A includes the exhaust fan 3EA and the exhaust fan attachment portion 14EA having a configuration in which the exhaust fan 3EA attached to the exhaust fan attachment portion 14EA is supported so as to be movable in the front-rear direction. The heat exchange type ventilation apparatus 1A is configured such that the exhaust fan 3EA can be detached from the front side of the apparatus body 10 by moving in the front-rear direction by removing the front plate 11a of the housing 11.

  In the heat exchange element 2, a member constituting the first heat exchange air passage 20a through which the outside air OA passes and a member constituting the second heat exchange air passage 20b through which the return air RA pass are the first heat exchange air passage. The air flow between 20a and the second heat exchange air passage 20b is laminated so as to be in a shielded state.

  In the state where the heat exchange element 2 is attached to the heat exchange element attachment portion 13, the first heat exchange air passage 20a and the second heat exchange air passage 20b are alternately stacked along the front-rear direction. Further, the heat exchange element 2 is provided with a return air inlet 21RA through which the return air RA is sucked and a supply air outlet 21SA through which the supply air SA is blown out in parallel with the upper part of the heat exchange element 2. Furthermore, the heat exchange element 2 is provided with an outside air inlet 21OA through which the outside air OA is sucked and an exhaust outlet 21EA through which the exhaust EA is blown out in parallel at the lower part of the heat exchange element 2.

  In this example, when the heat exchanger element 2 is viewed from the front, the apparatus main body 10 is formed with a return air inlet 21RA at the upper left portion and an air supply outlet 21SA at the upper right portion. In addition, the heat exchange element 2 has an outside air inlet 21OA formed in the lower part on the left side, and an exhaust outlet 21EA formed in the lower part on the right side.

  As a result, heat is exchanged with the air that is sucked from the outside air inlet 21OA at the lower part of the heat exchange element 2, passes through the first heat exchange air passage 20a, and is blown from the supply air outlet 21SA at the upper part of the heat exchange element 2. The air flows sucked from the return air inlet 21RA at the upper part of the element 2 and passes through the second heat exchange air passage 20b, and the air flows blown out from the exhaust outlet 21EA at the lower part of the heat exchange element 2 face each other. Here, when the heat exchange element 2 is configured to be able to exchange humidity between the first heat exchange air passage 20a and the second heat exchange air passage 20b, a fungicide is added to a moisture permeable layer (not shown). By doing so, generation of mold is suppressed.

  The heat exchange type ventilation device 1A passes through the return air suction space 15RA through which the return air RA sucked from the return air suction port 21RA of the heat exchange element 2 and the exhaust EA blown out from the exhaust outlet 21EA of the heat exchange element 2 pass. An exhaust outlet space 15EA is provided.

  Further, the heat exchange type ventilator 1A includes an outside air suction space 15OA through which the outside air OA sucked from the outside air suction port 21OA of the heat exchange element 2 and a supply air SA blown from the supply air outlet 21SA of the heat exchange element 2 are provided. A supply air blowing space 15SA is provided.

  In this example, the heat exchange type ventilator 1 </ b> A has a return air suction space 15 </ b> RA formed in the upper part on the left side of the air passage forming member 12 when the device main body 10 is viewed from the front. A supply air blowing space 15SA is formed. Further, in the heat exchange type ventilator 1 </ b> A, an outside air suction space 15 </ b> OA is formed in the lower left part of the air passage forming member 12, and an exhaust outlet space 15 </ b> EA is formed in the lower right part of the air passage forming member 12.

  The heat exchange type ventilation device 1A includes an outside air suction air passage 16OA in which the outside air suction port 10OA and the outside air suction space 15OA are communicated with each other. The heat exchange type ventilator 1A is isolated from the return air suction space 15RA by the air passage forming member 12 on the side of the heat exchange element 2 when viewed from the front side of the device body 10, in this example, the outside air suction port 10OA. And an outside air suction space 15OA are provided to form an outside air suction air passage 16OA.

  Further, the heat exchange type ventilator 1A includes an exhaust outlet air passage 16EA in which the exhaust outlet space 15EA and the exhaust outlet 10EA are communicated with each other via an exhaust fan 3EA. In the heat exchange ventilator 1A, an exhaust fan mounting portion 14EA is formed on the side of the exhaust blowing space 15EA, and the exhaust blowing space 15EA and the exhaust fan 3EA communicate with each other.

  The heat exchange type ventilator 1A passes through the rear of the air supply fan 3SA through the air passage forming member 12 on the side of the heat exchange element 2 in this example, that is, the right side when the apparatus main body 10 is viewed from the front, and the air supply blowout space 15SA. The exhaust blower air passage 16EA is configured by providing a space where the exhaust fan 3EA and the exhaust blower outlet 10EA communicate with each other.

  Further, in the heat exchange type ventilator 1A, the return air suction port 10RA and the return air suction space 15RA communicate with each other. Further, in the heat exchange type ventilator 1A, an air supply fan mounting portion 14SA is formed on the side of the air supply space 15SA, and the air supply space 15SA and the air supply fan 3SA communicate with each other to supply the air supply fan 3SA and the air supply fan 3SA. The air outlet 10SA communicates.

  As a result, the heat exchange ventilator 1A includes the outside air inlet 10OA, the outside air suction air passage 16OA, the outside air suction space 15OA, the first heat exchange air passage 20a of the heat exchange element 2, the supply air blowing space 15SA, and the air supply fan. A supply air passage 17SA in which 3SA and the supply air outlet 10SA communicate with each other is formed.

  Further, the heat exchange type ventilator 1A includes a return air suction port 10RA, a return air suction space 15RA, a second heat exchange air passage 20b of the heat exchange element 2, an exhaust blowout space 15EA, an exhaust fan 3EA, and an exhaust blowout air passage 16EA. And an exhaust air passage 17EA communicating with the exhaust outlet 10EA is formed.

  The heat exchange ventilator 1 </ b> A includes a bypass air passage 18 that bypasses the second heat exchange air passage 20 b of the heat exchange element 2. In the heat exchange ventilator 1A, a bypass air passage inlet 18a is formed by an opening provided on the rear surface side of the return air suction space 15RA, and a bypass air passage 18b is formed by an opening provided on the rear surface side of the exhaust outlet space 15EA. Then, a space in which the return air suction space 15RA and the exhaust outlet space 15EA communicate with each other is provided in the air passage forming member 12 behind the heat exchange element 2, and the bypass air passage 18 is formed.

  The heat exchange type ventilator 1 </ b> A includes an air path opening / closing damper 4 that opens and closes the bypass air path 18. In the heat exchange type ventilator 1A, an air path opening / closing damper 4 having a configuration for opening and closing the opening is attached to a bypass air path inlet 18a provided in the return air suction space 15RA.

  As a result, the heat exchange ventilator 1 </ b> A opens and closes the air passage opening / closing damper 4 to allow the entire amount of the return air RA to pass through the second heat exchange air passage 20 b of the heat exchange element 2 and the return air RA. The air passage through which the portion passes through the second heat exchange air passage 20b of the heat exchange element 2 and the remainder through the bypass air passage 18 is switched.

  The heat exchange type ventilation device 1A includes a collection filter 5 and an air supply filter 6 in an air supply air passage 17SA. The heat exchange type ventilation device 1A is attached to and detached from the outside air suction air passage 16OA in which air flows from the upper part to the lower part, with the bag-shaped collection filter 5 in the direction of the opening part of the bag on the upper side and the bottom part of the bag on the lower side. Installed as possible. The collection filter 5 is composed of a nonwoven fabric or the like in which the bag portion has a color similar to that of the collection object, such as black.

  Further, in the heat exchange type ventilator 1 </ b> A, the air supply filter 6 is detachably attached from the front of the apparatus body 10 to the inlet of the outside air suction space 15 </ b> OA downstream of the collection filter 5.

  Here, the heat exchange type ventilator 1 </ b> A may include a mechanism for cleaning the air supply filter 6. The filter cleaning mechanism includes, for example, a brush operable along the rail on the upstream side of the air supply filter 6. The brush is configured to be able to pass through the entire air passage surface of the air supply filter 6 by moving while being guided by the rail. The filter cleaning mechanism includes a tray at the lower portion of the air supply filter 6 and collects dust and the like dropped from the air supply filter 6 by the operation of the brush.

<Example of configuration of air supply fan and exhaust fan>
FIG. 6 is a side view illustrating an example of an air supply fan and an exhaust fan according to the present embodiment, and FIG. 7 is a perspective view illustrating an example of an air supply fan and an exhaust fan according to the present embodiment. The configurations of the air supply fan 3SA and the exhaust fan 3EA will be described with reference to FIG.

  The air supply fan 3SA is an example of an air supply blower, the exhaust fan 3EA is an example of an exhaust blower, and the air supply fan 3SA and the exhaust fan 3EA rotate the multi-blade impeller 30 and the impeller 30 that are driven to rotate. The motor 30M to be provided, the fan case 31 that forms the air path, and the air volume detection sensor 32 that detects the air volume of the air passing through the fan case 31 are provided.

  The fan case 31 is an example of an air path forming means, and a fan suction port 31a which is a suction portion into which air is sucked when the impeller 30 is driven to rotate, and a blowout of air sucked from the fan suction port 31a. The fan blower outlet 31b which is a part is provided. In addition, the fan case 31 includes a fan case air passage 31c that is an air passage that generates a flow of air that blows out air sucked from the fan air inlet 31a from the fan air outlet 31b.

  The air supply fan 3SA and the exhaust fan 3EA are provided with a fan suction port 31a formed of a circular opening called a bell mouth along the axial direction of the impeller 30. Further, the air supply fan 3SA and the exhaust fan 3EA are provided with a fan case air passage 31c along the outer periphery of the impeller 30, and the air sucked from the fan suction port 31a along the axial direction of the impeller 30 It blows out from the fan blower outlet 31b along the rotation direction of the vehicle 30.

  When the supply fan 3SA is attached to the supply fan attachment portion 14SA, the axis of the impeller 30 is oriented along the horizontal direction, and the fan suction port 31a is disposed on the side. The air supply fan 3SA has a shape in which the fan case air passage 31c is bent upward, and the fan air outlet 31b is disposed at the upper part.

  Similarly, when the exhaust fan 3EA is attached to the exhaust fan attachment portion 14EA, the shaft of the impeller 30 is oriented along the horizontal direction, and the fan suction port 31a is disposed on the side portion. Further, the exhaust fan 3EA has a shape in which the fan case air passage 31c is bent upward, and the fan outlet 31b is disposed in the upper part.

  The fan case air passage 31c includes a first air passage 31d that communicates with the air passage formed along the outer periphery of the impeller 30 and in which air sucked from the fan suction port 31a flows along the lateral direction. The fan case air passage 31c includes a bent portion 31e that communicates with the first air passage 31d and bends the air flow along the lateral direction passing through the first air passage 31d in the vertical direction. Further, the fan case air passage 31c includes a second air passage 31f that communicates with the bent portion 31e and that blows air from the fan air outlet 31b along the vertical direction.

  The fan case 31 has a shape in which the opening area of the fan case air passage 31c widens at the bent portion 31e from the first air passage 31d toward the second air passage 31f.

  The air volume detection sensor 32 is an example of a detection means, and a shutter member 32a that rotates by an air flow passing through the fan case air passage 31c and a shutter member 32a attached to the shaft 32b, and the rotation angle of the shaft 32b by the rotation of the shutter member 32a. The encoder 32c is provided as angle detection means for outputting a signal corresponding to the above.

  The air volume detection sensor 32 is configured such that the length from the tip which is one end of the shutter member 32a to the shaft 32b is longer than the length from the rear end which is the other end of the shutter member 32a to the shaft 32b. A shaft 32b is eccentrically provided with respect to the shutter member 32a.

  In the air volume detection sensor 32, the first air path 31d and the second air path 31f communicate with each other so that the rotation direction of the shutter member 32a with the shaft 32b as a fulcrum is along the bent direction of the fan case air path 31c. The shutter member 32a is disposed at the bent portion 31e of the fan case air passage 31c.

  That is, the air volume detection sensor 32 sets the direction of the shaft 32b to a direction along a horizontal direction substantially orthogonal to the air flow passing through the fan case air passage 31c, and sets the position of the shaft 32b to the first air passage 31d. The shutter member 32a is disposed in the vicinity of the bent portion 32e as a position that is offset upward and is offset in the direction of the second air passage 31f.

  In the ventilation stop state in which the impeller 30 is stopped, the air volume detection sensor 32 rotates in a direction in which one end side of the shutter member 32a faces downward, with the shutter member 32a rotating by its own weight around the shaft 32b as a shutter. The member 32a is oriented along the vertical direction. Here, as shown by a solid line in FIG. 5, the angle when the shutter member 32a is oriented along the vertical direction in the ventilation stopped state is set to 0 °.

  The air volume detection sensor 32 is configured such that a gap is formed at a predetermined interval between the tip of the shutter member 32a and the inner surface of the fan case 31 forming the fan case air passage 31c in a ventilation stopped state. The length of 32a and the position of the shaft 32b are set.

  Thereby, the air supply fan 3SA and the exhaust fan 3EA are in an initial state in which a part of the first air passage 31d is blocked by the shutter member 32a and the impeller 30 is rotationally driven in the ventilation stopped state. A flowing space is formed.

  Further, in the supply fan 3SA and the exhaust fan 3EA, the position of the shaft 32b of the shutter member 32a is offset upward with respect to the first air passage 31d and is offset in the direction of the second air passage 31f. As a result, the trajectory t of the shutter member 32a rotating in the opening direction by the air flow indicated by the one-dot chain line in FIG. 5 can enter the second air passage 31f.

  Then, since air flows upward in the second air passage 31f, the air supply fan 3SA and the exhaust fan 3EA are applied with a force to rotate the shutter member 32a upward, and the maximum rotation angle α of the shutter member 32a is It becomes possible to set 90 ° or more, preferably more than 90 °.

  Here, when the rotation angle α of the shutter member 32a is 180 ° or more, it cannot be restored by its own weight, so the rotation angle α of the shutter member 32a is set larger than 90 ° and smaller than 180 °.

  Further, as described above, in the supply fan 3SA and the exhaust fan 3EA, the shutter member 32a is disposed in the vicinity of the bent portion 31e, and the opening area of the fan case air passage 31c is changed from the first air passage 31d to the second air passage 31d. By having the shape that widens at the bent portion 31e toward the air passage 31f, the opening area of the fan case air passage 31c is increased by the operation of rotating the shutter member 32a in the opening direction by the flow of air.

  The supply fan 3SA and the exhaust fan 3EA include a first stopper 33a and a second stopper 33b that regulate the rotation angle of the shutter member 32a. The first stopper 33a and the second stopper 33b protrude into the locus t of the rotation operation of the shutter member 32a with the shaft 32b as a fulcrum, and the rotation angle of the shutter member 32a is regulated by the shutter member 32a being abutted. Is done.

  That is, the first stopper 33a is a shutter member 32a caused by the flow of air generated when the impeller 30 is rotationally driven with respect to the shutter member 32a stopped in the direction along the vertical direction in the ventilation stopped state. It is provided in the direction opposite to the rotation direction.

  As a result, the first stopper 33a prevents the shutter member 32a, which is stopped in the direction along the vertical direction in the ventilation stopped state, from rotating in the reverse direction due to the backflow of air or the like. Here, the first stopper 33a may not be provided.

  Here, the first stopper 33a is provided at a position where it does not come into contact with the shutter member 32a stopped in the direction along the vertical direction in the ventilation stopped state, and the first stopper 33a and the shutter member 32a are prevented from sticking. Is done.

  The second stopper 33b is provided in front of 180 ° which is the upper limit value of the rotation angle of the shutter member 32a. Thereby, the second stopper 33b prevents the shutter member 32a from rotating by 180 ° or more.

  Here, the second stopper 33b is provided at a position where it does not come into contact with the shutter member 32a rotated to a predetermined upper limit position by driving the impeller 30 so as to obtain a predetermined maximum air volume. Thus, the second stopper 33b and the shutter member 32a are prevented from sticking.

  In the air volume detection sensor 32, when dust or the like accumulates around the shaft 32b, it becomes a load of the rotation operation of the shutter member 32a. Therefore, a convex rib (not shown) is provided on the outer peripheral surface of the shaft 32b to make it difficult for dust and the like to adhere to the shaft 32b, thereby preventing accumulation of dust and the like.

  Further, by providing ribs in a direction that matches the flow of air around the shaft 32b, the effect of preventing adhesion of dust and the like can be improved. Further, by increasing the weight of the shutter member 32a within a range in which a predetermined rotation angle can be obtained with an assumed air volume, the force with which the shutter member 32a returns by its own weight can be improved, and the shutter member 32a can be prevented from sticking. Further, by bringing the center of gravity of the shutter member 32a closer to the distal end side by insert molding of metal or the like, the force with which the shutter member 32a returns by its own weight can be improved, and the shutter member 32a can be prevented from sticking. Further, a mechanism for cleaning the shaft 32b and the periphery may be provided.

<Control function example of the heat exchange type ventilator of the present embodiment>
FIG. 8 is a block diagram showing an example of the control function of the heat exchange type ventilator of the present embodiment. Next, referring to each figure, the control function of the heat exchange type ventilator 1A of the present embodiment will be described. explain.

  The heat exchange type ventilator 1A includes a motor 30M of the supply fan 3SA and an exhaust fan 3EA based on the air volume detected by the air volume detection sensor 32 provided in the supply fan 3SA and the air volume detection sensor 32 provided in the exhaust fan 3EA. The control part 300 which controls the motor 30M of this is provided.

  The control unit 300 is an example of a control unit, and a table of angle information and air volume information output from the encoder 32c of the air volume detection sensor 32 is set and output from each air volume detection sensor 32 of the supply fan 3SA and the exhaust fan 3EA. Based on the angle information, the respective air volumes of the air supply fan 3SA and the exhaust fan 3EA are detected.

  The controller 300 controls the voltage applied to the motor 30M of the air supply fan 3SA based on the air volume detected by the air volume detection sensor 32 of the air supply fan 3SA so that a predetermined air volume can be obtained by the air supply fan 3SA. . Further, the controller 300 controls the motor 30M of the exhaust fan 3EA so that the exhaust fan 3EA can obtain a predetermined air volume that is the same as or different from that of the air supply fan 3SA based on the air volume detected by the air volume detection sensor 32 of the exhaust fan 3EA. Control the applied voltage.

  In addition, the controller 300 sets a table of voltage information to be applied to the motor 30M and target air volume information when a predetermined voltage is applied to the motor 30M, and is applied to the motor 30M in the supply fan 3SA and the exhaust fan 3EA. The presence or absence of load such as clogging of the air supply filter 6 is detected based on the detected voltage and the air volume detected by each air volume detection sensor 32.

<Example of installation of ventilation device of the present embodiment>
FIG. 9 is a schematic configuration diagram illustrating an example of a building in which the heat exchange type ventilator according to the present embodiment is installed. The heat exchanging ventilator 1 </ b> A is provided in an installation room 101 provided in a building 100 for opening / closing a lid portion 11 b that is opened and closed when the collection filter 5 is replaced, and for removing the front plate 11 a, The air fan 3SA and the exhaust fan 3EA are installed in a form that allows predetermined maintenance in the apparatus main body 10 such as inspection and replacement.

  In the heat exchange type ventilator 1A, an OA duct 71OA is connected to the OA duct joint 11OA. The OA duct 71OA is disposed on the ceiling or the like of the building 100 and is connected to an OA suction grill 72OA provided on the outer wall. In the heat exchange type ventilation apparatus 1A, the EA duct 71EA is connected to the EA duct joint 11EA. The EA duct 71EA is disposed on the ceiling or the like of the building 100 and is connected to an EA blowing grill 72EA provided on the outer wall.

  Furthermore, in the heat exchange type ventilation apparatus 1A, the SA duct 71SA is connected to the SA duct joint 11SA. The SA duct 71SA is disposed on the ceiling or the like of the building 100, and is connected to the SA blowing grill 72SA provided on the ceiling or the like of the living room 102. Further, in the heat exchange type ventilator 1A, the RA duct 71RA is connected to the RA duct joint 11RA. The RA duct 71RA is disposed on the ceiling or the like of the building 100 and is connected to an RA suction grill 72RA provided on the ceiling or the like of the living room 102.

<Operation example of the heat exchange type ventilator of the present embodiment>
Next, with reference to each figure, the operation example of 1 A of heat exchange type ventilation apparatuses of this Embodiment is demonstrated.

  In the heat exchange type ventilator 1A, the air sucked from the fan inlet 31a of the air supply fan 3SA is supplied through the fan case air passage 31c when the impeller 30 of the air supply fan 3SA is rotationally driven. It blows out from the fan blower outlet 31b of the fan 3SA.

  Thus, in the heat exchange type ventilator 1A, when the supply fan 3SA is driven, an air flow through the supply air passage 17SA is generated, and the outside air OA is sucked from the OA suction grill 72OA. The outside air OA sucked from the OA suction grill 72OA passes through the OA duct 71OA and is sucked into the apparatus main body 10 from the outside air suction port 10OA.

  The outside air OA sucked into the apparatus main body 10 from the outside air suction port 10OA passes through the collection filter 5 and the air supply filter 6 from the outside air suction air passage 16OA, and is introduced from the outside air suction space 15OA to the outside air suction port 21OA of the heat exchange element 2. Is done.

  The outside air OA introduced into the heat exchange element 2 from the outside air inlet 21OA passes through the first heat exchange air passage 20a of the heat exchange element 2, passes through the supply air outlet space 15SA from the supply air outlet 21SA of the heat exchange element 2. The air is sucked into the fan suction port 31a of the supply fan 3SA.

  The air sucked into the air supply fan 3SA is blown out from the fan outlet 31b of the air supply fan 3SA, and the air blown out from the air supply fan 3SA is supplied from the air supply outlet 10SA to the outside of the apparatus body 10 as the air supply SA. Blown out. Then, the supply air SA blown out from the supply air outlet 10SA passes through the SA duct 71SA and is blown out from the SA blowout grill 72SA to the living room 102.

  On the other hand, in the heat exchanging ventilator 1A, when the impeller 30 of the exhaust fan 3EA is rotationally driven, the air sucked from the fan inlet 31a of the exhaust fan 3EA passes through the fan case air passage 31c. It is blown out from the 3EA fan outlet 31b.

  As a result, when the exhaust fan 3EA is driven, the heat exchange ventilator 1A generates an air flow through the exhaust air passage 17EA, and the return air RA, which is the air in the room 102, is sucked from the RA suction grill 72RA. The return air RA sucked from the RA suction grill 72RA passes through the RA duct 71RA and is sucked into the apparatus main body 10 from the return air suction port 10RA.

  The return air RA sucked into the apparatus main body 10 from the return air suction port 10RA is introduced into the return air suction port 21RA of the heat exchange element 2 from the return air suction space 15RA. The return air RA introduced into the heat exchange element 2 from the return air inlet 21RA passes through the second heat exchange air passage 20b of the heat exchange element 2, passes through the exhaust outlet space 21EA from the exhaust outlet 21EA of the heat exchange element 2. The air is sucked into the fan suction port 31a of the exhaust fan 3EA.

  The air sucked into the exhaust fan 3EA is blown out from the fan blowout port 31b of the exhaust fan 3EA, and the air blown out from the exhaust fan 3EA passes through the exhaust blowout air passage 16EA and serves as the exhaust EA from the exhaust blowout port 10EA. 10 is blown out. The exhaust EA blown out from the exhaust outlet 10EA passes through the EA duct 71EA and is blown out from the EA blow grill 72EA.

  In the heat exchanging ventilator 1A, the heat exchange element 2 performs heat exchange between the outside air OA and the return air RA, so that the supply air SA that is brought close to room temperature is blown into the room, and the temperature is adjusted. Fresh air (outside air OA) is supplied into the room. In addition, dirty air in the room is exhausted outdoors, and ventilation is performed while suppressing fluctuations in room temperature.

  In the heat exchange type ventilator 1A, the heat exchange element 2A is sucked from the outside air inlet 21OA at the lower part of the heat exchange element 2, passes through the first heat exchange air passage 20a, and is blown out from the air supply outlet 21SA at the upper part of the heat exchange element 2. The air is sucked from the return air inlet 21RA at the upper part of the heat exchange element 2, passes through the second heat exchange air passage 20b, and the flow of air blown from the exhaust outlet 21EA at the lower part of the heat exchange element 2 is opposed. To do. As a result, the distance at which the outside air OA and the return air RA can exchange heat is increased, and the heat exchange efficiency is improved.

  In the heat exchange type ventilator 1A, the air passage opening / closing damper 4 is opened based on the temperature of the outside air OA or the like. In the heat exchange type ventilator 1A, when the air passage opening / closing damper 4 is opened, a part of the return air RA passing through the exhaust air passage 17EA is exchanged between the return air suction space 15RA and the exhaust outlet space 15EA. The remaining portion of the return air RA passing through the second heat exchange air passage 20b and passing through the exhaust air passage 17EA bypasses the heat exchange element 2 and passes through the bypass air passage 18.

  In spring and autumn, the temperature difference between the outside and the room is generally small, and even if heat exchange is performed between the outside air OA and the return air RA, the outside air OA before heat exchange and the supply air SA after heat exchange There may be little temperature change between.

  Therefore, the air path opening / closing damper 4 is opened, a part of the return air RA passes through the heat exchange element 2, and the remaining part bypasses the heat exchange element 2. The heat exchange element 2 has a narrow air path and a large ventilation resistance. For this reason, a part of the return air RA passes through the heat exchange element 2, and the remaining part bypasses the heat exchange element 2, whereby the ventilation resistance can be reduced.

  In winter when the outside air OA is below freezing point, heat exchange is performed between the high humidity return air RA and the low temperature outside air OA, so that the temperature of the return air RA is lowered. The exhaust outlet 21EA, which is the outlet of the return air RA, may freeze.

  Therefore, the air path opening / closing damper 4 is opened, a part of the return air RA passes through the heat exchange element 2, and the remaining part bypasses the heat exchange element 2. As a result, the return air RA that has not undergone heat exchange and has not been lowered in temperature is blown into the exhaust outlet space 15EA, and the exhaust outlet 21EA of the heat exchange element 2 can be warmed to prevent the exhaust outlet 21EA from freezing. can do.

  Next, air volume detection by the air volume detection sensor 32 and control based on the air volume detection will be described. In the heat exchange type ventilator 1A, the shutter member of the air volume detection sensor 32 provided in the air supply fan 3SA is driven by the flow of air passing through the fan case air passage 31c when the impeller 30 of the air supply fan 3SA is rotationally driven. 32a rotates around the shaft 32b.

  Based on the angle information output from the encoder 32c of the air volume detection sensor 32 and the table of air volume information, the control unit 300 calculates the air supply fan 3SA from the angle information of the shutter member 32a output from the air volume detection sensor 32 of the air supply fan 3SA. The voltage applied to the motor 30M of the air supply fan 3SA is controlled so that a predetermined air volume is obtained by the air supply fan 3SA.

  Further, in the heat exchange ventilator 1A, the shutter member of the air volume detection sensor 32 provided in the exhaust fan 3EA is driven by the flow of air passing through the fan case air passage 31c when the impeller 30 of the exhaust fan 3EA is rotationally driven. 32a rotates around the shaft 32b.

  Based on the table of angle information and air volume information, the controller 300 detects the air volume of the exhaust fan 3EA from the angle information of the shutter member 32a output from the air volume detection sensor 32 of the exhaust fan 3EA, and the exhaust fan 3EA detects a predetermined air volume. So that the voltage applied to the motor 30M of the exhaust fan 3EA is controlled.

  In the heat exchange ventilator 1A, the supply air passage 17SA and the exhaust air passage 17EA generally have different airflow resistance due to the difference in the air passage shape and the difference in the air passage length. Therefore, the voltage applied to the motor 30M of each of the air supply fan 3SA and the exhaust fan 3EA is changed based on the air volume detected by the air volume detection sensor 32 of each of the air supply fan 3SA and the exhaust fan 3EA. By doing so, control is performed to make the supply air amount and the exhaust air amount constant regardless of the difference in ventilation resistance between the supply air passage 17SA and the exhaust air passage 17EA. Further, control is performed to make the air supply amount and the exhaust air amount different from each other so that the air supply is excessively supplied and the air is excessively ventilated.

  Further, the control unit 300 applies the voltage to the motor 30M in the supply fan 3SA and the exhaust fan 3EA based on the voltage information applied to the motor 30M and the table of the target air volume information when a predetermined voltage is applied to the motor 30M. From the voltage and the airflow detected by each airflow detection sensor 32, the presence or absence of occurrence of load such as clogging of the air supply filter 6 and the heat exchange element 2 is detected.

  Then, when detecting the occurrence of a load, the control unit 300 notifies the user by notifying means (not shown) that outputs a display or sound. Here, in the configuration provided with a mechanism for cleaning the air supply filter 6, when the generation of a load is detected from the air flow detected by the air flow detection sensor 32, it is determined that the air supply filter 6 is clogged, and the air supply fan 3SA and the exhaust fan 3EA may be stopped and the filter cleaning mechanism may be activated. Moreover, it is good also as operating a filter cleaning mechanism regularly for every fixed time.

<Examples of effects of the heat exchange type ventilator of the present embodiment>
In a ventilator such as a heat exchange type ventilator, the air volume is controlled to be constant by making the rotation speed of the impeller constant or by applying a constant voltage to the motor that drives the impeller. However, the actual airflow was not constant because there were fluctuation factors of the airflow, such as variations in duct length during construction, the influence of external wind pressure, and increase in ventilation resistance with use.

  The heat exchange type ventilator is provided with an air supply fan that sucks outside air OA and blows it out as supply air SA, and an exhaust fan that sucks return air RA and blows it out as exhaust air EA. Generally, the ventilation resistance of the air path and the exhaust air path differ depending on the difference in the air path shape and the air path length.

  For this reason, in the control of making the rotation speed of the impeller constant or the voltage applied to the motor that drives the impeller constant, the air volume is made the same on the air supply side and the exhaust side, or It has been difficult to perform control such as changing the air volume by a predetermined amount on the exhaust side.

  On the other hand, in the heat exchange type ventilator 1A of the present embodiment, the air flow detection sensor 32 is provided in each of the supply fan 3SA and the exhaust fan 3EA. In the present embodiment, a table of angle information and air volume information output from the encoder 32c of the air volume detection sensor 32 is set, and based on the angle information output from each air volume detection sensor 32 of the supply fan 3SA and the exhaust fan 3EA. The air flow of each of the supply fan 3SA and the exhaust fan 3EA is detected. Then, based on the air volume detected by the air volume detection sensor 32, the voltage applied to the motor 30M is controlled so that a predetermined air volume is obtained.

  Thereby, based on the air volume detected by the air volume detection sensor 32 of each of the supply fan 3SA and the exhaust fan 3EA, the voltage applied to the motor 30M of each of the supply fan 3SA and the exhaust fan 3EA is set. It is possible to control the air volume to be constant regardless of the variation of the duct length or the influence of the external wind pressure.

  Further, since the voltage applied to the motor 30M can be controlled so that a predetermined air volume can be obtained based on the detected air volume in each of the air supply fan 3SA and the exhaust fan 3EA, the air supply air path 17SA and the exhaust air path 17EA are controlled. Regardless of the difference in ventilation resistance, it is possible to control the air volume to be constant in each air passage, or to control the air volume to be different by a predetermined amount on the air supply side and the exhaust side, such as excessive air supply and excessive ventilation.

  In the present embodiment, the flow of air passing through the air path is detected by detecting the air volume at the rotation angle of the shutter member 32a. However, it is detected by another air volume sensor, a wind speed sensor, a pressure sensor, or the like. The motor 30M may be controlled based on the value to be set.

  As described above, with a ventilation device such as a heat exchange type ventilation device, by providing a sensor for detecting the air volume in the air path, it is possible to control the air volume to be constant based on the air volume detected by the sensor. Become.

  However, since the fan and the sensor are independent components and are attached to the members constituting the air passage, the air flow length between the fan and the sensor is long, and due to an error in the mounting position of the fan and the sensor, the ventilation device Each fan and sensor mounting position varies, and there are many factors that cause the air volume to fluctuate, such as the arrangement of a heat exchange element between the fan and sensor. .

  Also, since the fan and sensor are independent components, it is not possible to detect the air volume with the fan alone, and to perform a test to control the motor based on the detected air volume, and to evaluate the performance of the fan alone. I could not.

  On the other hand, in the heat exchange type ventilation apparatus 1A, the air volume detection sensor 32 is provided in the fan case 31 of the supply fan 3SA and the exhaust fan 3EA, and the components for detecting the air volume are the supply fan 3SA and the exhaust fan 3EA. It is unitized.

  Thereby, the arrangement of the air supply fan 3SA / exhaust fan 3EA and the air volume detection sensor 32 is brought closer, and the positional relationship between the air supply fan 3SA / exhaust fan 3EA and the air volume detection sensor 32 is stabilized. Since it can be set as the structure which does not arrange | position the components which inhibit the flow of air between the impeller 30 to generate | occur | produce and the air volume detection sensor 32, stability of air volume control improves.

  In addition, it is possible to detect the air volume with a single fan, perform a test for controlling the motor based on the detected air volume, etc., and evaluate the performance of the fan alone.

  In the heat exchange type ventilator 1A, the rotation angle of the shutter member 32a increases as the air volume increases in the supply fan 3SA and the exhaust fan 3EA. In the present embodiment, the fan case air passage 31c is bent upward at the bent portion 32e, and the shutter member 32a of the air volume detection sensor 32 is disposed at the bent portion 31e, whereby the rotation angle of the shutter member 32a is It can be set larger than 90 °.

  As a result, the air volume can be detected even when the rotation angle of the shutter member 32a is 90 ° or more with the increase in the air volume in the supply fan 3SA and the exhaust fan 3EA, and the air volume control when the air volume is increased. Can be done.

  Here, in the configuration in which the rotatable angle of the shutter member is 90 ° or less, the amount of change in the air volume per unit angle that can be detected by the encoder is large. For this reason, the change amount of the air volume that can be detected is large, and a minute change in the air volume cannot be detected.

  In contrast, in the configuration in which the rotatable angle of the shutter member 32a is greater than 90 °, the amount of change in the air volume per unit angle that can be detected by the encoder 32c is small. For this reason, the change amount of the air volume that can be detected becomes small, and a minute change in the air volume can be detected.

  Further, in the configuration in which the air volume is detected by the rotation operation of the shutter member provided inside the air passage as in the present embodiment, when the shutter member is configured to block the air passage in the ventilation stopped state, It is possible to have a function of preventing backflow of the water.

  However, if the shutter member is configured to block the air passage when the ventilation is stopped, the airflow resistance when the air volume is small is increased. For this reason, in order to obtain a desired air volume with a small air volume, it is necessary to increase the rotational speed of the impeller.

  Further, in order to block the air passage when the ventilation is stopped, the shutter member is large in accordance with the opening area of the air passage, the rotation trajectory of the shutter member is large, and there is a large range in which components cannot be arranged around the shutter member. Become.

  On the other hand, in the present embodiment, the shutter member 32a does not have the function of preventing the backflow, and the air supply fan 3SA and the exhaust fan 3EA have the leading end of the shutter member 32a and the inner surface of the fan case 31 even when the ventilation is stopped. And a gap is formed at a predetermined interval. For this reason, even when the air volume is small and the rotation angle of the shutter member 32a is small, a space through which air flows is formed.

  Thereby, ventilation resistance in the state where there is little air volume can be made small, and the rotation speed of the impeller 30 for obtaining a desired air volume in the state where air volume is small can be reduced. If the rotation speed of the impeller 30 can be reduced, power consumption can be reduced and sound can also be reduced.

  In addition, other components cannot be arranged in the locus t of the rotational operation of the shutter member 32a, but a gap is formed between the tip of the shutter member 32a and the inner surface of the fan case 31 in a ventilation stopped state. Thus, the trajectory t of the rotation operation of the shutter member 32a is reduced, and the range in which no parts can be arranged around the shutter member 32a can be reduced.

  Here, if the clearance between the tip of the shutter member 32a and the inner surface of the fan case 31 is increased, the ventilation resistance is further reduced. However, in order to increase the gap between the front end of the shutter member 32a and the inner surface of the fan case 31, it is necessary to further reduce the shutter member 32a. However, the shutter member 32a does not rotate in a state where the air volume is small, and the air volume. May not be detected.

  For this reason, the dimensions of the shutter member 32a and the fan case air passage 31c are set so that the opening area of the fan case air passage 31c closed by the shutter member 32a in the ventilation stopped state is 20 to 60%.

  Further, in this embodiment, since the rotation angle of the shutter member 32a is set to be larger than 90 °, the airflow resistance is increased by providing the bent portion 31e in the fan case air passage 31c.

  On the other hand, in the present embodiment, the opening area of the fan case air passage 31c increases as the rotation angle of the shutter member 32a increases with the increase in the air volume in the air supply fan 3SA and the exhaust fan 3EA. .

  Thereby, ventilation resistance in the state with much air volume can be made small, and the rotation speed of the impeller 30 for obtaining a desired air volume in the state with much air volume can be lowered | hung. If the rotation speed of the impeller 30 can be reduced, power consumption can be reduced and sound can also be reduced.

  In the heat exchange type ventilator, in order to prevent the air flow resistance of the heat exchange element from increasing due to dust flowing into the air flow path of the heat exchange element, supply air to the upstream side of the heat exchange element in the air supply air path. A filter is provided so that the outside air can be introduced into the heat exchange element by removing dust and the like from the outside air. In a configuration that does not include an air supply filter, when the heat exchange element is clogged with dust or the like and the ventilation resistance increases, the heat exchange element needs to be replaced.

  On the other hand, the air supply filter needs to be cleaned by the user, but if the filter is not cleaned at an appropriate time, the air supply filter is clogged and the ventilation resistance increases.

  When the airflow resistance is increased by the air supply filter, the air volume decreases. Further, in order to increase the air volume, it is necessary to increase the rotational speed of the impeller, which increases the sound and power consumption.

  Therefore, in the present embodiment, when the generation of a load is detected from the air volume detected by the air volume detection sensor 32, it is determined that clogging has occurred in the air supply filter 6, and the user is notified by notifying the user. The cleaning time of the air filter 6 can be properly notified, and convenience is improved. Further, in the configuration including the mechanism for cleaning the air supply filter 6, if the generation of a load is detected from the air volume detected by the air volume detection sensor 32, the user does not perform cleaning if the filter cleaning mechanism is operated. However, the air supply filter 6 is cleaned, and the factor of increase in ventilation resistance can be eliminated.

  In the heat exchange type ventilator 1A of the present embodiment, an outside air inlet 10OA, a supply air outlet 10SA, a return air inlet 10RA, and an exhaust outlet 10EA are arranged on the upper surface of the apparatus body 10. In addition, an outside air intake air passage 16OA communicating with the outside air inlet 10OA is disposed on one side of the heat exchange element 2, and the outside air OA flows from the upper part to the lower part in the apparatus body 10, and at the lower part of the apparatus body 10 It is sucked from the outside air inlet 21OA of the heat exchange element 2 and flows in the heat exchange element 2 from the lower part to the upper part.

  Further, an exhaust outlet air passage 16EA communicating with the exhaust outlet 10EA is disposed on the other side of the heat exchange element 2, and the return air RA flows from the upper part to the lower part in the heat exchange element 2 to exchange heat with the outside air OA. The exhaust EA thus made flows from the lower part to the upper part in the apparatus main body 10.

  In the heat exchange type ventilation apparatus 1A of the present embodiment, the apparatus main body 10 can be downsized by adopting such an air path configuration. Further, the air supply fan 3SA and the exhaust fan 3EA are arranged on the side of the heat exchange element 2, and the bypass air passage 18 is arranged on the back side of the heat exchange element 2, so that the heat exchange element 2 can be The air supply fan 3SA and the exhaust fan 3EA can be configured to be detachable from the front surface of the apparatus main body.

  Further, since the outside air OA is configured to flow in the apparatus main body 10 from the upper part to the lower part, the collection filter 5 and the air supply filter 6 can be arranged in the lower part of the apparatus main body 10. If the filter is placed on the upper part of the device main body, when the filter is removed from the device main body when cleaning or replacing the filter, dust or the like adhering to the filter may rise up indoors. is there. On the other hand, by disposing the collection filter 5 and the air supply filter 6 in the lower part in the apparatus main body 10, it is possible to prevent dust and the like attached to the filter from rising and diffusing.

  Further, by arranging the air supply fan 3SA and the exhaust fan 3EA on the side of the heat exchange element 2, one of the two fans can be arranged at the lower part of the apparatus body 10, and the position of the center of gravity of the apparatus body 10 can be determined. It can be the lower side.

  The heat exchange type ventilator 1A of the present embodiment has an outside air suction air passage 16OA through which air flows from the upper part to the lower part, a bag-like collection filter 5 at the upper part, an opening part of the bag, and a bottom part of the bag at the lower part. By attaching in such a direction, it is possible to prevent collection objects such as insects entering the bag portion of the collection filter 5 from collecting in the bottom portion of the bag and backflowing into the air passage.

  In addition, the collection filter 5 is configured by a non-woven fabric or the like having a bag portion whose color is similar to that of the collection target, such as black, so that insects and the like collected by the collection filter 5 This makes it difficult for the user to see the filter when replacing it. Furthermore, since the bag part of the collection filter 5 can be wound up, when the collection filter 5 is removed from the apparatus main body 10, it is possible to prevent the collected insects from coming out even when the insects are alive.

  The present invention is applied to a ventilator in which air volume control is performed.

  DESCRIPTION OF SYMBOLS 1A ... Heat exchange type ventilator, 10 ... Main body, 10OA ... Outside air inlet, 10SA ... Supply air outlet, 10RA ... Return air inlet, 10EA ... Exhaust outlet 11 ... Case, 12 ... Air path forming member, 13 ... Heat exchange element mounting portion, 14SA ... Air supply fan mounting portion, 14EA ... Exhaust fan mounting portion, 15OA ... Outside air suction space, 15SA ... Supply air blowing space, 15RA ... Return air suction space, 15EA ... Exhaust air blowing space, 16OA ... Outside air suction air passage, 16EA ... Exhaust air blowing air passage, 17SA ..Supply air passage, 17EA ... exhaust air passage, 18 ... bypass air passage, 2 ... heat exchange element, 20a ... first heat exchange air passage, 20b ... second heat Exchange air path, 21OA ... Outside air inlet, 21SA ... Air supply outlet, 21RA Return air inlet, 21EA ... exhaust outlet, 3SA ... supply fan, 3EA ... exhaust fan, 30 ... impeller, 30M ... motor, 31 ... fan case, 31a ... Fan suction port, 31b ... Fan air outlet, 31c ... Fan case air passage, 31d ... First air passage, 31e ... Bent part, 31f ... Second air passage 32 ... Airflow detection sensor, 32a ... Shutter member, 32b ... Shaft, 32c ... Encoder, 33a ... First stopper, 33b ... Second stopper, 4 ... Air path opening / closing damper, 5 ... Collection filter, 6 ... Air supply filter, 300 ... Control unit

Claims (8)

It has a blower that sucks in and blows out air,
The blower is
An impeller that is rotationally driven;
An air passage forming means in which an air passage that generates a flow of air that blows out air sucked from the suction portion from the blow-out portion is formed by rotating the impeller, and
A ventilator comprising: a detecting means provided in the air passage forming means and detecting a flow of air passing through the air passage formed by the air passage forming means. The detection means includes
A shutter member that rotates about a shaft as a fulcrum by a flow of air passing through the air passage formed by the air passage forming means;
The ventilation apparatus according to claim 1, further comprising angle detection means for detecting a rotation angle of the shutter member. The air passage forming means communicates with the first air passage through which the air sucked from the suction portion flows along the lateral direction, and communicates with the first air passage along the lateral direction passing through the first air passage. A bent portion that bends the flow of air in the vertical direction; and a second air passage that communicates with the bent portion and that blows out from the blowing portion by flowing along the vertical direction.
The detection unit includes the shutter member in the vicinity of the bent portion at a position where the rotation direction of the shutter member with the shaft as a fulcrum is along the bent direction of the air path. The ventilation device described. The air passage forming means has a shape in which an opening area of the air passage is widened at the bent portion from the first air passage toward the second air passage,
The ventilation device according to claim 3, wherein the detection unit includes the shutter member at a position where an opening area of the air passage is widened by an operation of rotating the shutter member in a direction in which the shutter member is opened by an air flow. The detection means is characterized in that a locus of the shutter member rotating in a direction of opening by an air flow enters the second air path, and a maximum rotation angle of the shutter member is set to 90 ° or more. The ventilation apparatus according to claim 4. The detection unit is characterized in that a space is formed between a wall surface of the air passage forming unit that forms the air passage and the shutter member in a ventilation stop state in which the impeller is stopped. The ventilation apparatus of any one of Claims 2-5. With a heat exchange element that exchanges heat between outside air and indoor air,
The air blower sucks outside air and supplies the air that has been heat-exchanged with the air from the room by the heat exchange element into the room; the air blower sucks air from the room; An exhaust blower that exhausts the heat-exchanged air to the outside
The ventilation device according to any one of claims 1 to 6, wherein each of the supply air blower and the exhaust blower includes the detection unit. Based on the air flow detected by the detection means provided in the air supply and blower, the rotational drive of the impeller of the air supply and blower is controlled, and the detection provided in the exhaust and blower The ventilation device according to claim 7, further comprising a control unit that controls rotational driving of the impeller of the exhaust air blower based on a flow of air detected by the unit.

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