JP6315555B2 - Heat exchange ventilator - Google Patents

Description

  The present invention relates to a heat exchange ventilator.

  Conventionally, an exhaust air passage for exhausting indoor air to the outside and an air supply air passage for supplying outdoor air into the room, and an exhaust air flow flowing through the exhaust air passage and a supply air flow flowing through the air supply air passage There is a heat exchange ventilator that performs ventilation while exchanging heat between airflows by passing through the heat exchange element.

  As such a heat exchange ventilator, for example, Patent Document 1 discloses a device provided with a bypass air passage that bypasses a heat exchange element with respect to an exhaust air passage. This heat exchange ventilator is equipped with a damper device that switches whether the exhaust flow passes through a heat exchange element or a bypass air passage, and switches between heat exchange ventilation that performs heat exchange and normal ventilation that does not perform heat exchange. To be able to.

JP 2006-234294 A

  However, the conventional heat exchanging ventilator has a configuration in which an open / close blade is provided in a housing in which an air passage is formed, and when the damper device fails, replacement of each casing is required, which increases maintenance costs. There was a risk of inviting.

  This invention is made | formed in view of the above, Comprising: It aims at obtaining a heat exchange ventilator provided with the damper mechanism which is easy to maintain.

  In order to solve the above-described problems and achieve the object, the present invention provides a main body casing in which an exhaust air passage through which an exhaust flow passes and a supply air passage through which a supply air flow is formed, and an exhaust air passage. And a heat exchange element that exchanges heat between the exhaust air flow and the air supply airflow, and at least one of the exhaust airflow path and the air supply airflow path is provided downstream of the heat exchange element. A wall portion erected on the blower casing so as to face each other across a suction port formed in the blower casing of the blower, and from one wall portion toward the other wall portion A damper that rotates about the extending rotation shaft, and an exhaust air passage or a supply air passage joins from one side across the rotation shaft, and an exhaust air passage and a supply air passage from the other side across the rotation shaft Different confluence air ducts join, and the damper A volume of air sucked from the supply air flow path to the blower, characterized by varying the volume of air drawn into the blower from the confluent air passage.

  According to the present invention, since the air path is switched by the damper provided at the confluence portion of the air path at the suction port portion of the blower, the configuration of the damper can be simplified and the maintenance can be facilitated. Further, since the blower and the damper are close to each other, maintenance can be performed through a common maintenance port.

FIG. 1 is a plan view of the heat exchange ventilator according to the first embodiment of the present invention. FIG. 2 is a bottom view of the heat exchange ventilator shown in FIG. FIG. 3 is a front view of the heat exchange ventilator shown in FIG. FIG. 4 is a rear view of the heat exchange ventilator shown in FIG. 1. FIG. 5 is a left side view of the heat exchange ventilator shown in FIG. 1. FIG. 6 is a right side view of the heat exchange ventilator shown in FIG. 1. FIG. 7 is a plan view schematically showing the internal configuration of the casing of the heat exchange ventilator shown in FIG. 1. FIG. 8 is a front cross-sectional view showing a state in which the exhaust amount from the first indoor-side intake port is increased in the heat exchange ventilator shown in FIG. 1. FIG. 9 is a front cross-sectional view showing a state where the exhaust amount from the second indoor-side intake port is increased in the heat exchange ventilator shown in FIG. 1. FIG. 10 is a diagram schematically illustrating an air path configuration of the heat exchange ventilator illustrated in FIG. 1. FIG. 11 is an exploded perspective view of the exhaust blower. FIG. 12 is an exploded perspective view of the blower casing and the damper. FIG. 13 is a cross-sectional view of the exhaust blower showing a state where the direct exhaust air passage side is closed. FIG. 14 is a view of the exhaust blower in the state shown in FIG. 13 as seen from the heat exchange exhaust air passage side. FIG. 15 is a cross-sectional view of the exhaust fan showing a state where the heat exchange exhaust air passage side is closed. FIG. 16 is a view of the exhaust blower in the state shown in FIG. 15 as seen directly from the exhaust air passage side. FIG. 17 is a cross-sectional view of the exhaust blower showing a state in which both the first passage port and the second passage port are released. FIG. 18 is a cross-sectional view of the exhaust blower showing a state in which both the first passage port and the second passage port are closed. FIG. 19 is a perspective view of the heat exchange ventilator shown in FIG. 1 as viewed from the bottom surface side, and shows a state in which a filter is removed.

  Below, the heat exchange ventilation apparatus concerning embodiment of this invention is demonstrated in detail based on drawing. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is a plan view of the heat exchange ventilator according to the first embodiment of the present invention. FIG. 2 is a bottom view of the heat exchange ventilator shown in FIG. FIG. 3 is a front view of the heat exchange ventilator shown in FIG. FIG. 4 is a rear view of the heat exchange ventilator shown in FIG. 1. FIG. 5 is a left side view of the heat exchange ventilator shown in FIG. 1. FIG. 6 is a right side view of the heat exchange ventilator shown in FIG. 1. FIG. 7 is a plan view schematically showing the internal configuration of the casing of the heat exchange ventilator shown in FIG. 1.

  FIG. 8 is a front cross-sectional view showing a state in which the exhaust amount from the first indoor-side intake port is increased in the heat exchange ventilator shown in FIG. 1. FIG. 9 is a front cross-sectional view showing a state where the exhaust amount from the second indoor-side intake port is increased in the heat exchange ventilator shown in FIG. 1. FIG. 10 is a diagram schematically illustrating an air path configuration of the heat exchange ventilator illustrated in FIG. 1.

  The heat exchange ventilator 1 includes a casing (main body casing) 2, a heat exchange element 3, an exhaust fan 4, an air supply fan 5, an exhaust side filter unit 9, and an air supply side filter unit 10. The heat exchange ventilator 1 is generally installed in the ceiling of a building and performs ventilation while exchanging heat between indoor air and outdoor air.

  The casing 2 has a rectangular parallelepiped shape. In the following description, based on the installation posture of the heat exchange ventilator 1, the upper surface is the top surface (wall surface) 2a, the lower surface is the bottom surface (wall surface) 2b, and the other surfaces are side surfaces (wall surfaces). ) 2c. On the side surface 2c of the casing 2, a first indoor side inlet 21, an outdoor side outlet 22, a second indoor side inlet 23, an outdoor side inlet 24, and an indoor outlet 25 are formed as openings. (Not shown) can be connected.

  As shown schematically in FIG. 10, a heat exchange exhaust air passage 26 that connects the first indoor side suction port 21 and the outdoor side air outlet 22 is formed inside the casing 2. In addition, a heat exchange air supply air passage 27 that connects the outdoor-side intake port 24 and the indoor-side air outlet 25 is formed inside the casing 2.

  The heat exchange element 3 is disposed at an intersection where the heat exchange exhaust air passage 26 and the heat exchange air supply air passage 27 intersect. The heat exchange element 3 has a cubic shape. The heat exchange element 3 has one side of the cube as the exhaust inlet 3a and the opposite side as the exhaust outlet 3b. The exhaust passage 31 allows the exhaust flow through the heat exchange exhaust air passage 26 to pass therethrough, and the exhaust inlet 3a. An air supply passage 32 through which the air supply air flowing through the heat exchange air supply air passage 27 passes is formed with the surface adjacent to the one surface as the air supply air inlet 3c and the surface opposite to the air supply air inlet 3c (FIG. 8). , 9).

  The heat exchange element 3 exchanges heat between the exhaust flow passing through the exhaust passage 31 and the supply air flow passing through the supply passage 32. The heat exchange element 3 is formed in the casing 2 so that the surfaces on which the exhaust inlet 3a, the exhaust outlet 3b, the supply air inlet 3c, and the supply air outlet 3d are not parallel to the top surface 2a and the bottom surface 2b. Placed in. More specifically, the exhaust inlet 3a and the air supply outlet 3d are disposed in the casing 2 so as to face obliquely downward.

  The exhaust fan 4 is provided on the downstream side of the heat exchange element 3 in the heat exchange exhaust air passage 26. The exhaust blower 4 blows air from the outdoor air outlet 22. 8 and 9 show a detailed cross-sectional configuration of the exhaust blower 4. The exhaust blower 4 rotates the impeller 4a to discharge the air sucked from the bell mouth 4b from the discharge port 4c.

  The supply air blower 5 is provided on the downstream side of the heat exchange element 3 in the heat exchange supply air passage 27. The air supply blower 5 blows out air from the indoor air outlet 25. The supply air blower 5 has the same configuration as that of the exhaust blower 4, and a detailed description of the configuration is omitted.

  As shown schematically in FIG. 10, the casing 2 joins the heat exchange exhaust air passage 26 between the heat exchange element 3 and the exhaust blower 4 without passing through the heat exchange element 3. A direct exhaust air passage (merging air passage) 28 is formed. The second indoor side air inlet 23 is formed in a portion of the side surface 2 c of the casing 2 that directly surrounds the exhaust air passage 28. A plurality of second indoor-side suction ports 23 are formed in the casing 2. The plurality of second indoor-side suction ports 23 are formed on different side surfaces 2c of the casing 2, and are formed on the side surfaces 2c facing each other in the present embodiment.

  The heat exchange exhaust air passage 26 and the direct exhaust air passage 28 are merged at a suction portion into the bell mouth 4 b of the exhaust blower 4. The degree of opening of the heat exchange exhaust air passage 26 and the direct exhaust air passage 28 is adjusted at the junction of the heat exchange exhaust air passage 26 and the direct exhaust air passage 28, that is, the suction portion into the bell mouth 4 b of the exhaust blower 4. A damper 8 is provided. The exhaust blower 4 is arranged close to the top surface 2a side of the casing 2 in order to secure a space for providing the damper 8 at the suction portion of the exhaust blower 4 into the bell mouth 4b. In FIG. 10, the damper 8 is shown in front of the exhaust blower 4 for the sake of convenience of the drawing, but as shown in FIGS. 8 and 9, the damper 8 is provided at the suction portion to the bell mouth 4 b.

  As shown in FIGS. 8 and 9, in a side view, the first indoor side suction port 21 and the indoor side air outlet 25 are formed on one side across the heat exchange element 3, and the outdoor side air outlet 22 on the other side. An outdoor suction port 24 and a second indoor suction port 23 are formed. In the following description, in the casing 2, a region on one side across the heat exchange element 3 is also referred to as an indoor region, and a region on the other side is also referred to as an outdoor region.

  Here, a more detailed configuration of the exhaust blower 4 and the damper 8 will be described. FIG. 11 is an exploded perspective view of the exhaust fan 4. The exhaust blower 4 includes a motor 41 that rotates the impeller 4a and a blower casing 50 that houses the impeller 4a.

  FIG. 12 is an exploded perspective view of the blower casing 50 and the damper 8. In FIG. 12, the casing 50 and the damper 8 are shown upside down with respect to the state shown in FIG. The blower casing 50 is formed with a suction port 42, and a bell mouth 4 b is formed inside the suction port 42. A wall portion 51 and a wall portion 52 are formed in the blower casing 50 so as to face each other across the suction port 42.

  In the wall portion 51, slopes 51 a and 51 b are formed such that the distance from each other decreases as the distance from the blower casing 50 increases. The wall portion 52 is formed with slopes 52 a and 52 b that become smaller from each other as the distance from the blower casing 50 increases.

  The damper 8 is rotatable around a rotation shaft 8 a extending from the wall 51 to the wall 52. From one side of the rotating shaft 8a, the heat exchange exhaust air passage 26 joins the suction port 42 portion. From the other side across the rotating shaft 8a, the exhaust air passage 28 directly joins the suction port 42 portion.

  The damper 8 has a first blade 8b extending from the rotation shaft 8a to one side (the heat exchange exhaust air passage 26 side), and a second blade 8c extending from the rotation shaft 8a to the other side (direct exhaust air passage 28 side). The first blade 8 b and the second blade 8 c are integrally formed and are driven to rotate by a single motor 55. A motor holding portion 56 that holds the motor 55 is formed on the wall portion 51.

  FIG. 13 is a cross-sectional view of the exhaust blower 4 showing a state where the direct exhaust air passage 28 side is closed. FIG. 14 is a view of the exhaust blower 4 in the state shown in FIG. 13 as viewed from the heat exchange exhaust air passage 26 side. As shown in FIG. 14, a first passage port including an inclined surface 51 a of a wall portion 51, an inclined surface 52 a of a wall portion 52, a damper 8 and a blower casing 50, through which an exhaust flow passing through a heat exchange exhaust air passage 26 passes. 53 is formed.

  FIG. 15 is a cross-sectional view of the exhaust blower 4 showing a state where the heat exchange exhaust air passage 26 side is closed. FIG. 16 is a view of the exhaust fan in the state shown in FIG. 15 as viewed directly from the exhaust air passage 28 side. As shown in FIG. 16, a second passage port 54 is formed which includes the slope 51 b of the wall portion 51, the slope 52 b of the wall portion 52, the damper 8, and the blower casing 50, through which the airflow passing directly through the exhaust air passage passes. Is done.

  As shown in FIGS. 14 and 16, the blower casing 50 is formed with a contact surface 50a that contacts the tip of the first blade 8b of the damper 8 and a contact surface 50b that contacts the tip of the second blade 8c. The contact surfaces 50 a and 50 b may be formed as wall surfaces protruding from the blower casing 50.

  Here, an angle θ2 formed by the first blade 8b and the second blade 8c of the damper 8 is larger than an angle θ1 formed by the inclined surfaces 51a and 51b of the wall portion 51 (an angle formed by the inclined surfaces 52a and 52b of the wall portion 52). Is larger. Therefore, when one of the first blade 8b and the second blade 8c is brought into close contact with the slopes 51a, 51b, 52a, 52b of the walls 51, 52, the blades 51a, 51b, 52a, 52b are separated from each other. In addition, a plurality of ribs 8 d extending from the root portion toward the tip portion are formed on the surface of the first blade 8 b and the second blade 8 c that faces the blower casing 50.

  According to the exhaust blower 4 and the damper 8 configured as described above, as shown in FIGS. 13 and 14, the damper 8 is rotated so as to close the second passage port 54 with the second blade 8 c of the damper 8. Then, the opening degree of the first passage port 53 is increased, and the opening degree of the second passage port 54 is decreased. Therefore, the amount of airflow passing through the heat exchange exhaust air passage 26 can be made larger than the amount of airflow passing through the direct exhaust air passage 28.

  On the contrary, as shown in FIGS. 15 and 16, when the damper 8 is rotated so as to close the first passage port 53 with the first blade 8 b of the damper 8, The degree of opening is reduced, and the degree of opening of the second passage port 54 is increased. Therefore, the amount of airflow passing through the direct exhaust air passage 28 can be made larger than the amount of airflow passing through the heat exchange exhaust air passage 26.

  FIG. 17 is a cross-sectional view of the exhaust blower showing a state in which both the first passage port 53 and the second passage port 54 are released. As shown in FIG. 17, both the first passage port 53 and the second passage port 54 can be opened. In this way, by controlling the amount of rotation of the damper 8, it is possible to adjust the ratio between the amount of airflow passing through the heat exchange exhaust air passage 26 and the amount of airflow passing through the direct exhaust air passage 28.

  Also, since the rib 8d is formed on the first blade 8b and the second blade 8c, the flow of air sucked into the exhaust blower 4 can be rectified to improve suction efficiency and reduce noise. It becomes. Moreover, since the ratio of the airflow passage amount can be adjusted simply by providing the walls 51 and 52 and the damper 8 at the suction port 42 portion of the exhaust blower 4, the structure of the damper mechanism can be simplified. Further, since the exhaust blower 4 and the damper 8 are close to each other, maintenance can be performed through a common maintenance port.

  In addition, you may apply the structure which adjusts the passage amount of the airflow of the air path merged by the exhaust inflow port 3a of the exhaust air blower 4 with the damper 8 to the air supply air blower 5 side. Further, the damper 8 is formed in such a size that the tips of the blades 8b and 8c can be brought into contact with the contact surfaces 50a and 50b of the blower casing 50, so that the first passage port 53 or the second passage port 54 is formed. Although it can be closed, it may be formed in a size that does not completely close the first passage port 53 or the second passage port 54.

  FIG. 18 is a cross-sectional view of the exhaust blower 4 showing a state where both the first passage port 53 and the second passage port 54 are closed. In the damper 8, if the first blade 8b and the second blade 8c are configured separately and configured to rotate independently of each other, as shown in FIG. 18, the first passage port 53 and the second blade 8c It is also possible to block both the passage ports 54. In this case, it is necessary to rotate one of the first blade 8b and the second blade 8c with the motor 55 and rotate the other with another motor (not shown).

  Next, the detailed path | route of each air path formed in the casing 2 is demonstrated. As described above, in the side view, the first indoor side air inlet 21 and the indoor side air outlet 25 are formed on one side across the heat exchange element 3. That is, the heat exchange exhaust air passage 26 and the heat exchange air supply air passage 27 are formed in the indoor region in the casing 2. In the indoor region, the heat exchange exhaust air passage 26 is formed on the bottom surface 2b side, and the heat exchange air supply air passage 27 is formed on the top surface 2a side.

  In addition, when viewed from the side, an outdoor air outlet 22, an outdoor air inlet 24, and a second indoor air inlet 23 are formed on the other side of the heat exchange element 3. That is, a heat exchange exhaust air passage 26, a heat exchange air supply air passage 27, and a direct exhaust air passage 28 are formed in the outdoor region in the casing 2. In the outdoor region of the casing 2, the heat exchange exhaust air passage 26 is formed on the top surface 2 a side at the outflow portion from the heat exchange element 3, and is formed downstream thereof toward the bell mouth 4 b portion of the exhaust blower 4. . In the outdoor region of the casing 2, the heat exchange air supply passage 27 is formed on the bottom surface 2 b side at the inflow portion to the heat exchange element 3, and is formed in a position where the exhaust blower 4 is avoided in a plane upstream thereof.

  FIG. 19 is a perspective view of the heat exchange ventilator 1 shown in FIG. 1 as viewed from the bottom surface 2b side, and shows a state in which a filter is removed. The casing 2 of the heat exchange ventilator 1 is formed with openings 2d and 2e into which the exhaust side filter unit 9 and the supply side filter unit 10 are inserted. An exhaust filter 11 is held in the exhaust side filter unit 9. An air supply filter 12 is held in the air supply side filter unit 10.

  By inserting the exhaust-side filter unit 9 into the opening 2d, the exhaust filter 11 is attached upstream of the heat exchange element 3 in the heat exchange exhaust air passage 26. Thus, dust contained in the exhaust flow can be captured by the exhaust filter 11 before flowing into the heat exchange element 3. The exhaust filter 11 is installed at a position that does not overlap the heat exchange element 3 in a plan view, that is, a position that avoids a region below the heat exchange element 3.

  By inserting the air supply side filter unit 10 into the opening 2e, the air supply filter 12 is attached to the upstream side of the heat exchange element 3 in the heat exchange air supply air passage 27. As a result, the dust contained in the air supply air can be captured by the air supply filter 12 before flowing into the heat exchange element 3.

  Next, an application example when the heat exchange ventilator 1 according to the present embodiment is applied as a general residential ventilator will be described. In a general residence, a toilet and a bathroom are raised as a room for exhausting air. Among these, the 1st indoor side inlet 21 is connected with the duct connected to the ventilation opening of a toilet. Moreover, the 2nd indoor side suction inlet 23 is connected with the duct connected to the ventilation opening of a bathroom. Moreover, the outdoor side blower outlet 22 connects with the duct connected to the outdoors. Moreover, the outdoor side inlet 24 is connected with the duct connected with the outdoors, and the indoor side blower outlet 25 is connected with the duct connected with air supply openings, such as a living room.

  In this way, by connecting the room in the house and the outdoors to the heat exchange ventilator 1, the indoor air exhausted from the toilet is passed through the heat exchange exhaust air passage 26, and the outdoor air taken in from the outdoors is taken as the heat exchange air supply air passage 27. Therefore, ventilation can be performed while allowing the indoor air and the outdoor air to pass through the heat exchange element 3 and performing heat exchange.

  In general, the amount of air to be discharged from the bathroom is less than the amount of air to be discharged from the toilet or the like, except when it is desired to dry the room after using the bathroom. Therefore, for example, in normal time in 24-hour ventilation, as shown in FIGS. 13 and 14, the opening degree of the heat exchange exhaust air passage 26 (the degree of opening of the first passage port 53) is increased, and air from a toilet or the like is increased. Increase the amount of exhaust.

  When the inside of the bathroom is dried after the use of the bathroom, as shown in FIGS. 15 and 16, the opening degree of the direct exhaust air passage 28 (the opening degree of the second passage port 54) is increased to exhaust the air from the bathroom. The amount can be increased to speed up drying in the bathroom. While the opening degree of the direct exhaust air passage 28 is increased, the output of the exhaust blower 4 may be increased to perform control for further speeding up drying in the bathroom.

  According to the application example described above, high-humidity air exhausted from the bathroom can be directly exhausted outdoors without passing through the heat exchange element 3. Since high humidity air from the bathroom does not pass through the heat exchange element 3, it is difficult for condensation to occur in the heat exchange element 3.

  Here, in the heat exchange element 3, there is a paper partition member that partitions the exhaust passage 31 and the supply passage 32. A heat exchange element made of paper as a partition member is likely to be deteriorated by moisture generated by condensation, and heat exchange efficiency is likely to be lowered. However, by exhausting air from the bathroom directly through the exhaust air passage 28, condensation is unlikely to occur in the heat exchange element 3, so a paper heat exchange element can be used as the partition member.

  As a moisture-resistant heat exchange element in which the heat exchange efficiency is not easily lowered by moisture, there is one in which a partition member is made of resin. In general, a heat exchange element made of paper has a higher heat exchange efficiency than a heat exchange element made of resin. Therefore, the heat exchange efficiency of the heat exchange ventilator 1 can be improved by using a paper heat exchange element.

  In addition, the air exhausted from the bathroom is likely to contain a smell of soap or a hair washing agent, a smell of a detergent when drying clothes in the bathroom, and the like. In the heat exchange element, a part of the exhaust flow may be mixed in the supply airflow. When the air exhausted from the bathroom is passed through the heat exchange element, the odor of soap etc. leaks into the living room along with the air flow by the exhaust flow mixed into the air supply, causing discomfort to the people in the room May end up. In the present embodiment, since exhaust from the bathroom can be performed directly from the exhaust air passage 28, exhaust from the bathroom containing odor can be exhausted without passing through the heat exchange element 3. Therefore, it can suppress that the smell from a bathroom leaks into a living room.

  In general, the heat exchange efficiency is higher when all the air exhausted from the room is passed through the heat exchange element 3. In the present embodiment, it is considered that the heat exhausted from the bathroom directly connected to the exhaust air passage 28 does not pass through the heat exchanging element 3 and the heat exchanging efficiency decreases. Here, in the present embodiment, the direct exhaust air passage 28 is formed only in the outdoor region in the casing 2. In other words, it is not necessary to form the direct exhaust air passage 28 across the indoor region from the outdoor region. In the conventional heat exchange ventilator, a bypass air passage that extends from the indoor region to the outdoor region is formed as an air passage that bypasses the heat exchange element. In such a heat exchange ventilator, in order to straddle the bypass air passage, the installation space for the heat exchange element is limited, and it is necessary to make the heat exchange element smaller by that amount.

  On the other hand, in the present embodiment, the direct exhaust air passage 28 for exhausting air without passing through the heat exchange element 3 is formed only in the outdoor region, so that an air passage for bypassing the heat exchange element 3 is formed. There is no need. Therefore, in the heat exchange ventilator 1 according to the present embodiment, a larger heat exchange element 3 can be used than the heat exchange ventilator in which the bypass air passage is formed. For example, as shown in FIGS. 8 and 9, the distance between the top surface 2a or bottom surface 2b of the casing 2 and the heat exchange element 3 is reduced, and as shown in FIG. 7, the side surface 2c of the casing 2 and the heat exchange element 3 , The larger heat exchange element 3 can be used. By using a larger heat exchange element 3, it is possible to improve the heat exchange efficiency. Further, as described above, by using the heat exchange element 3 made of paper as the partition member, it is possible to further improve the heat exchange efficiency.

  That is, in the present embodiment, the heat exchange efficiency, which is reduced by exhausting a part of the air exhausted from the room directly from the exhaust air passage 28, can be supplemented by the size and material of the heat exchange element 3. . As a result, it is possible to obtain a heat exchange efficiency equal to or higher than that when all the air exhausted from the room is passed through the heat exchange element.

  In addition, since the damper 8 is provided at the joining portion of the heat exchange exhaust air passage 26 and the direct exhaust air passage 28, that is, the suction portion into the bell mouth 4 b of the exhaust blower 4, for example, the first side The number of dampers can be reduced as compared with the case where dampers are provided at the indoor side air inlets 21 and the second indoor side air inlets 23.

  Moreover, since the 2nd indoor side inlet port 22 is formed in the several surface of the casing 2, it is possible to select the connection position of a duct according to the condition of the place where the heat exchange ventilation apparatus 1 is installed. Thus, the workability can be improved.

  Further, the heat exchange element 3 is disposed in the casing 2 with the exhaust inlet 3a and the supply air outlet 3d facing obliquely downward. Therefore, in the indoor region of the casing 2, the heat exchange exhaust air passage 26 can be formed on the bottom surface 2 b side. Thereby, the exhaust filter 11 can be attached to the upstream side of the heat exchange element 3 in the heat exchange exhaust air passage 26 by inserting the exhaust side filter unit 9 from the bottom surface 2 b of the casing 2.

  Further, in the outdoor region of the casing 2, the heat exchange air supply air passage 27 can be formed on the bottom surface 2 b side at the inflow portion to the heat exchange element 3. Thus, by inserting the air supply side filter unit 10 from the bottom surface 2 b of the casing 2, the air supply filter 12 can be attached to the upstream side of the heat exchange element 3 in the heat exchange air supply path 27.

  Thus, since each filter 11 and 12 can be attached or detached by insertion / extraction of each filter unit 9 and 10 from the bottom face 2b of the casing 2, for example, the filter 11 can be easily removed from an inspection port formed on the ceiling surface. 12 can be attached and detached. On the other hand, in contrast to the present embodiment, when the heat exchange element 3 is disposed so that the exhaust inlet 3a and the supply air outlet 3d face obliquely upward, the filters 11 and 12 are arranged on the top surface 2a side. It is necessary to attach to. Therefore, it becomes difficult to attach and detach the filters 11 and 12 only by inserting and removing from the bottom surface 2b side.

  In the present embodiment, as shown in FIGS. 8 and 9, the opening degree of the heat exchange exhaust air passage 26 and the direct exhaust air passage 28 is switched by the damper 8; You may comprise so that a path | route may be obstruct | occluded completely.

  As described above, the heat exchange ventilator according to the present invention is useful for a heat exchange ventilator including a damper so that a part of exhaust gas or supply air does not pass through the heat exchange element.

  DESCRIPTION OF SYMBOLS 1 Heat exchange ventilator, 2 Casing (main body casing), 2a Top surface (wall surface), 2b Bottom surface (wall surface), 2c Side surface (wall surface), 2d, 2e opening, 3 Heat exchange element, 3a Exhaust inlet, 3b Exhaust flow Outlet, 3c air supply inlet, 3d air supply outlet, 4 exhaust blower, 4a impeller, 4b bell mouth, 4c outlet, 5 air supply blower, 8 damper, 8a rotating shaft, 8b first blade, 8c second blade, 8d rib, 9 exhaust side filter unit, 10 air supply side filter unit, 11 exhaust filter, 12 air supply filter, 21 first indoor side inlet port, 22 outdoor outlet, 23 second indoor side inlet port, 24 Outdoor air inlet, 25 Indoor air outlet, 26 Heat exchange exhaust air passage, 27 Heat exchange air supply passage, 28 Direct exhaust air passage (merging air passage), 31 Exhaust passage, 32 Air supply passage Road, 42 Suction port, 50 Blower casing, 50a, 50b Contact surface, 51, 52 Wall, 51a, 51b, 52a, 52b Slope, 53 First passage port, 54 Second passage port, 55 Motor, 56 Motor Holding part.

Claims (6)

A main body casing in which an exhaust air passage through which an exhaust flow passes and a supply air passage through which a supply air flow is formed;
A heat exchange element that is disposed at an intersection where the exhaust air passage and the supply air passage intersect, and exchanges heat between the exhaust air flow and the supply air flow;
A blower provided on the downstream side of the heat exchange element at least one of the exhaust air passage and the supply air passage,
A wall portion erected on the blower casing so as to face each other across the suction port formed in the blower casing of the blower,
A damper that rotates about a rotation axis that extends from one of the walls toward the other wall, and
The exhaust air passage or the supply air passage joins from one side across the rotation shaft, and the confluence air passage different from the exhaust air passage and the supply air passage joins from the other side across the rotation shaft,
On one side of the rotating shaft, a first passage through which the exhaust flow or the air supply air is passed is configured to include the wall portion,
On the other side of the rotating shaft, a second passage port through which the airflow passing through the merging air passage passes is configured to include the wall portion,
The damper has a first blade capable of closing at least a part of the first passage opening, and a second blade capable of closing at least a part of the second passage opening,
When the damper rotates in a direction to close the first passage opening, the degree of opening of the second passage opening increases, and by rotating in a direction to close the second passage opening, the damper The opening degree of the first passage opening is increased, and the amount of air sucked into the blower from the exhaust air passage or the supply air passage and the amount of air sucked into the blower from the merging air passage are variable. Heat exchange ventilator. Of the wall portion, the portion that constitutes the first passage port and the portion that constitutes the second passage port are surfaces where the mutual distance decreases as the distance from the blower casing increases.
The heat exchange ventilator according to claim 1 , wherein an angle formed by the first blade and the second blade is larger than an angle formed by the surfaces of the wall portion. The heat exchange ventilator according to claim 1 , wherein the first blade and the second blade rotate separately. Of the first blade and the second blade, ribs extending from the root portions of the first blade and the second blade toward the tip portion are formed on a surface facing the blower casing. The heat exchange ventilator according to any one of claims 1 to 3 . The heat exchange ventilator according to any one of claims 1 to 4 , wherein the blower casing is formed with a contact surface that abuts against tip portions of the first blade and the second blade. A motor for rotating the damper;
The heat exchange ventilator according to any one of claims 1 to 5 , wherein the blower casing is provided with a motor holding portion that holds the motor.

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