Heat exchange ventilator

Abstract

To provide a heat exchange ventilation device capable of being installed according to a limited space such as a ceiling space, an underfloor space, or an inter-floor space of a house, and having high maintenance efficiency.SOLUTION: The heat exchange ventilation device 1 includes an outside air suction port 81, a supply air discharge port 82, a return air suction port 83, and an exhaust air discharge port 84, exchanges heat between outside air taken in from the outside and air taken in from the inside, and supplies the air into the inside. In addition, the first fan unit 11 and the second fan unit 12 having both or at least one of a suction port and a discharge port and a fan, and the heat exchange unit 20 having a heat exchange element are provided, and casings of the first fan unit 11 and the second fan unit 12 can be directly connected to and separated from each other, and when the casings are connected to each other, an exhaust air flow path communicating the return air suction port 83 and the exhaust air discharge port 84 and a supply air flow path communicating the outside air suction port 81 and the supply air discharge port 82 are formed.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a heat exchange ventilation device that is installed in the attic or underfloor space of a house, and exchanges heat between fresh air taken in from outdoors and indoor air that is discharged outdoors, and supplies the air indoors. [Background technology]

[0002] Heat exchange ventilation systems are installed in places other than living spaces, such as the attic, underfloor space, or between floors, but these spaces are generally not large enough, so there are cases where the installation location of the heat exchange ventilation system is limited or even impossible. Even if it is possible to install it, there is also the problem that maintenance work is difficult if the construction situation of the building makes it impossible to install an inspection hatch near the heat exchange ventilation system.

[0003] Here, the invention described in Patent Document 1 is known as an invention relating to a heat exchange ventilation device installed in the attic or underfloor space of a house. The heat exchange ventilator 1 described in Patent Document 1 is installed in the attic, underfloor space, wall surface, etc. of a building, and is provided with a blower unit 2 having a first exhaust air duct 28 for exhausting air from inside the room to the outside and a first intake air duct 29 for supplying air from outside the room into the room, and having an exhaust blower 22 arranged in the first exhaust air duct 28 and an intake air blower 23 arranged in the first intake air duct 29, and a heat exchanger unit 3 having a second exhaust air duct 37 for exhausting air from inside the room to the outside and a second intake air duct 38 for supplying air from outside the room into the room, and having a heat exchange element 32 for exchanging heat between the exhaust flow flowing through the second exhaust air duct 37 and the intake air flow flowing through the second intake air duct 38 (Figure 1). In addition, the blower unit 2 and the heat exchanger unit 3 are installed separately from each other and are provided with a connection unit 4 that connects the first exhaust air duct 28 to the second exhaust air duct 37 and also connects the first intake air duct 29 to the second intake air duct 38. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2020-197317 Summary of the Invention [Problem to be solved by the invention]

[0005] In the heat exchange ventilation device described in Patent Document 1, in order to increase the degree of freedom in selecting the installation location of the heat exchange element, the blower unit and the heat exchanger unit are installed in a state where they are separated from each other, and the separated units are connected by a connection unit (paragraphs 0005 to 0008 of the specification of Patent Document 1). However, if the blower unit and the heat exchanger unit are installed in different locations, workers must inspect each installation location during maintenance, so this configuration cannot be said to be efficient for maintenance.

[0006] Therefore, an object of the present invention is to provide a heat exchange ventilation device that can be installed in a limited space such as the attic or underfloor space of a house, or the space between floors, and that is easy to maintain. [Means for solving the problem]

[0007] The heat exchange ventilation device according to the present invention has an outside air inlet that takes in outside air, an intake air outlet that supplies the outside air indoors, a return air inlet that takes in indoor air, and an exhaust air outlet that discharges the air outdoors, and is a heat exchange ventilation device that exchanges heat between the outside air taken in from outdoors and air taken in from indoors and supplies the air indoors, a first fan unit having at least one of an inlet and an outlet and a first fan; a second fan unit having at least one of an inlet and an outlet and a second fan; a heat exchange unit having a heat exchange element, the first fan unit, the second fan unit, and the heat exchange unit have casings that are directly connectable to and separable from each other; By connecting the first fan unit, the second fan unit, and the heat exchange unit, an exhaust flow path connecting the return air intake and the exhaust outlet, and an intake air flow path connecting the outside air intake and the intake air outlet are formed.

[0008] With this configuration, when the first fan unit, the second fan unit, and the heat exchange unit are connected, an exhaust flow path is formed in which indoor air taken in through the return air inlet passes through the heat exchange element and is discharged outdoors through the exhaust outlet, and an intake air flow path is formed in which outdoor air taken in through the outdoor air inlet passes through the heat exchange element and is supplied indoors through the intake air outlet.In addition, at this time, the outdoor air taken in from outdoors is heat exchanged with the air taken in from indoors through the heat exchange element before being supplied indoors.

[0009] On the other hand, another heat exchange ventilation device according to the present invention is a heat exchange ventilation device that has an outside air inlet that takes in outside air, an intake air outlet that supplies the outside air indoors, a return air inlet that takes in indoor air, and an exhaust air outlet that discharges the air outdoors, and that exchanges heat between the outside air taken in from outdoors and air taken in from indoors and supplies the air indoors, a first fan unit having at least one of an inlet and an outlet and a first fan; a second fan unit having at least one of an inlet and an outlet and a second fan; a heat exchange unit having a heat exchange element; an air duct unit; the first fan unit, the second fan unit, the heat exchange unit, and the air passage unit have casings that are directly connectable to and separable from each other; By connecting the first fan unit, the second fan unit, the heat exchange unit, and the air duct unit, an exhaust flow path connecting the return air intake port and the exhaust outlet port, and an intake air flow path connecting the outside air intake port and the supply air outlet port are formed.

[0010] The casings of the first fan unit, the second fan unit, and the heat exchange unit are It is desirable that the configuration have a first flange portion having an opening and protruding horizontally, provided at the upper and / or lower ends of the peripheral edge of the side surface, and / or a second flange portion protruding horizontally, provided at the left and / or right ends of the peripheral edge of the side surface.

[0011] The heat exchange ventilation device has a support frame in which a flow path member, a partition plate, and the first fan or the second fan are integrated, the support frame is detachably provided in a casing of the first fan unit and a casing of the second fan unit, the partition plate is provided on the flow path member and partitions the insides of the casings of the first fan unit and the second fan unit to form the exhaust flow path and the intake air flow path, It is desirable that the first fan and the second fan are installed facing the partition plate.

[0012] In particular, in a configuration in which the heat exchange ventilation device has a support frame or the like, it is desirable that the partition plate be configured to be inclined so that the flow path within the casing of the first fan unit or the second fan unit narrows downstream from the outside air intake port or the return air intake port.

[0013] Furthermore, the heat exchange ventilation device is preferably configured such that inspection covers are provided on the top and bottom surfaces of the casing of the heat exchange unit.

[0014] In addition, the heat exchange ventilation device is provided with a control device capable of adjusting the airflow rates of the first fan and the second fan, It is desirable that the control device be configured to be connected via a wiring cable to connectors that connect to the motors of the first fan and the second fan, which are provided in the casing of the first fan unit and the casing of the second fan unit, respectively. [Effects of the Invention]

[0015] According to the heat exchange ventilation device of the present invention, with such a configuration, (1-1) Because the heat exchange ventilation system is composed of multiple separable units, namely, the first fan unit, the second fan unit, and the heat exchange unit, these can be separated and some of them can be removed. For example, if the heat exchange ventilation system is installed in the attic or under the floor, each unit (only the heat exchange unit or only the fan unit) can be removed through an inspection hatch in the ceiling or floor for inspection or replacement, making maintenance easy. (1-2) The type, size, shape, etc. of the heat exchange element and the dimensions of the heat exchange unit can be changed depending on the conditions of the location where the heat exchange ventilation device is installed. (1-3) The direction in which the heat exchange unit is connected to the first and second fan units can be freely designed. For example, the first and second fan units can be connected to both sides of the heat exchange unit, respectively, or the first and second fan units and the heat exchange unit can be connected side by side in the width direction or height direction. Therefore, the configuration of the heat exchange ventilator can be freely changed to suit the space where the heat exchange ventilator is installed, such as in the attic or underfloor space. (1-4) The casings of the first fan unit, the second fan unit, and the heat exchange unit can be directly connected to each other, so the heat exchange ventilator is constructed and installed with each unit integrated. This allows workers to inspect each unit at the location where the heat exchange ventilator is installed during maintenance. Furthermore, the installation space for the heat exchange ventilator can be minimized.

[0016] (2) Furthermore, by further providing an air duct unit, the first fan unit and the like can be freely connected in the vertical or horizontal direction, etc., so that when connecting ducts to the outlet and inlet of the heat exchange ventilator, the positions of the outlet and the like can be freely changed depending on the installation location of the heat exchange ventilator, etc. Therefore, for example, even if one side of the place where the heat exchange ventilator is installed is a wall or a floor, the duct can be connected to the outlet and the like by locating the outlet and the inlet on the other side.

[0017] Furthermore, by adopting a configuration having a first flange and / or a second flange, (3-1) When the casing of each unit is composed of multiple plate-like members such as a top panel, a bottom panel, and side panels, for example, the top panel and side panels can be assembled by fastening them together with screws at the first flange, or the back panel and side panels can be assembled by fastening them together with screws at the second flange, thereby preventing screws from getting inside the casing. This makes it easy to insert and remove (replace) fans, heat exchange elements, and other components inside the casing during maintenance. (3-2) Since the first flange portion has an opening, each unit can be hung and installed by attaching a hanging member to the opening. (3-3) When constructing a heat exchange ventilation device by abutting the bottom surface of one unit against the top surface of another unit, the heat exchange ventilation device can be easily constructed by fixing the first flange portion provided on the top surface of one unit and the first flange portion provided on the bottom surface of the other unit by inserting bolts, nuts, etc. into their respective openings.

[0018] (4) Furthermore, by configuring the heat exchange ventilator with a support frame, etc., the heat exchange unit can be removed alone, as described above, and after removing the heat exchange unit, the entire support frame can be removed from the casing of the first and second fan units, with the first and second fans still installed. This makes it easy to perform maintenance on the fans, partitions, and other parts inside the first and second fan units.

[0019] (5-1) In particular, by configuring the partition plate to be inclined, the partition plate is inclined so that the flow path inside the casing narrows from the outside air intake or return air intake of the first and second fan units toward the downstream side, making it possible to secure a larger area for taking in outside air or indoor air, and allowing for smoother air intake and exhaust. (5-2) Furthermore, by arranging the partition plate at an angle, one of the partitioned areas within the casing can be made larger, and the fan can be installed within that larger area, making it possible to make the fan unit thinner than if the partition plate were arranged horizontally. (5-3) Note that outside air and indoor air are drawn in through the fan's intake port and blown out through the outlet port, but because the partition is tilted, the fan's intake port on the partition is also tilted so that the intake surface faces in the direction of the outside air, etc. This allows outside air, etc. to be drawn in more smoothly through the fan's intake port.

[0020] (6) Furthermore, by providing an inspection cover, the heat exchange element installed in the casing of the heat exchange unit can be inspected or replaced through the inspection cover. If the heat exchange ventilator is installed above the ceiling, inspection can be performed through the inspection cover on the bottom, and if the heat exchange ventilator is installed in the underfloor space, inspection can be performed through the inspection cover on the top. If the heat exchange ventilator is installed in the space between the first and second floors, inspection can be performed from the second floor through the inspection cover on the top, and from the first floor through the inspection cover on the bottom.

[0021] (7) In addition, by configuring the system with a control device, the control device is connected to each fan via a wiring cable, and by changing the length of the wiring cable, the airflow rate of the first and second fans can be adjusted.The control device can also be installed in various locations, such as on the outer surface of each casing, near inspection hatches in the ceiling or floor, or on the wall of a room. [Brief explanation of the drawings]

[0022] [Figure 1] 1 is a perspective view of a heat exchange ventilation device according to an embodiment of the present invention. [Figure 2] 2(i) is a plan view of the heat exchange ventilation device shown in FIG. 1, (ii) is a front view, and (iii) is a rear view. [Figure 3] FIG. 2(i) is a left side view of the heat exchange ventilation device shown in FIG. 1, and FIG. 2(ii) is a right side front view. [Figure 4] 1 is a diagram showing a state in which each unit of a heat exchange ventilation device according to an embodiment of the present invention is separated. FIG. [Figure 5] 10 is a view showing a state in which a support frame is removed from the second fan unit according to the embodiment of the present invention. FIG. [Figure 6] FIG. 3 is a diagram for explaining the flow of air, based on a partially omitted cross-sectional view taken along line AA in FIG. 2(i). [Figure 7] FIG. 2 is a diagram for explaining a control device according to an embodiment of the present invention. [Figure 8] 1 is a diagram showing a state in which a heat exchange ventilation device according to an embodiment of the present invention is installed in the ceiling. [Figure 9] FIG. 10 is a diagram showing a state in which a heat exchange ventilation device according to another embodiment of the present invention is installed in the ceiling. [Figure 10] FIG. 10 is a diagram showing a state in which a heat exchange ventilation device according to another embodiment of the present invention is installed in the ceiling. [Figure 11] FIG. 10 is a schematic diagram showing a heat exchange ventilation device according to another embodiment of the present invention. [Figure 12] 5A and 5B are schematic diagrams showing a heat exchange ventilation device according to another embodiment of the present invention, in which (i) is a schematic diagram in plan view, and (ii) is a schematic diagram of the BB cross section of (i). DETAILED DESCRIPTION OF THE INVENTION

[0023] The following describes in detail an embodiment of the present invention, but the description of the components described below is one example (typical example) of an embodiment of the heat exchange ventilator according to the present invention, and the present invention is not limited to the following content unless the gist of the present invention is changed. Furthermore, components having the same functions are given the same reference numerals in the drawings, and detailed descriptions thereof will be omitted. In this description, the front-to-back, left-to-right, and up-to-down directions of the heat exchange ventilator are as shown in Figure 1, and the dashed lines in each figure indicate the air flow. In addition, in this description, the first fan unit 11, the second fan unit 12, and the heat exchange unit 20 may be collectively referred to as "each unit," the first fan unit 11 and the second fan unit 12 may be collectively referred to as "each fan unit," and the first fan 43 and the second fan 44 may be collectively referred to as "each fan."

[0024] [Heat exchange ventilation device according to the first embodiment] First, a heat exchange ventilator 1 according to a first embodiment of the present invention will be described with reference to FIGS. The heat exchange ventilator 1 is a device that supplies and exhausts air through a duct D, a grill, and the like. In detail, the heat exchange ventilator 1 has an outside air inlet 81 that takes in outdoor air, an intake air outlet 82 that supplies the outside air indoors, a return air inlet 83 that takes in indoor air, and an exhaust outlet 84 that exhausts the air outdoors, and is a heat exchange ventilator that exchanges heat between the fresh outside air taken in from outdoors and the indoor air that is exhausted outdoors and supplies the air indoors (see FIGS. 1 to 3). Note that in FIGS. 2, 3, and some other drawings, the duct D is omitted, and the short pipes T for connecting the outside air inlet 81 and other ducts are shown exposed.

[0025] The heat exchange ventilation device 1 also comprises a first fan unit 11, a second fan unit 12, and a heat exchange unit 20, and the casings of these (casing 11c of the first fan unit 11, casing 12c of the second fan unit 12, and casing 20c of the heat exchange unit 20) can be directly connected to each other.

[0026] The heat exchange ventilator 1 is configured to be arranged in a row with the heat exchange units 20 positioned between the fan units (see FIG. 1). Each unit of the heat exchange ventilator 1 is separable (see FIG. 4).

[0027] [Each unit] Here, the first fan unit 11 has both or at least one of an inlet and an outlet, and a first fan 43 (see FIG. 6). In the first embodiment, the first fan unit 11 has an outside air inlet 81 and an exhaust outlet 84, and the first fan 43 is an exhaust fan that operates to draw in indoor air.

[0028] On the other hand, the second fan unit 12 has both or at least one of an inlet and an outlet, and a second fan 44 (see FIG. 6). In the first embodiment, the second fan unit 12 has an intake air outlet 82 and a return air intake 83, and the second fan 44 is an intake air fan that operates to draw in outside air.

[0029] Each fan not only operates to draw in outside air or indoor air, but also to push out outside air or indoor air. Furthermore, each fan unit can have the same configuration, and in the first embodiment, the shape, size, fan, etc. are the same, so for convenience, the fan unit located in front of the heat exchange unit 20 is referred to as the first fan unit 11, and the fan unit located behind it is referred to as the second fan unit 12. Furthermore, in the first embodiment, each fan uses a sirocco fan, which is a type of centrifugal fan, but of course, each fan is not limited to this.

[0030] Each fan unit has a support frame 40 (see FIG. 5) in the casing 11c, 12c. The support frame 40 is integrated with a flow path member 41, which can be separated into upper and lower halves. In the first embodiment, the flow path member 41 is made of polystyrene foam. The support frame 40 can be removed from the casing 11c, 12c (see the same figure) or attached.

[0031] Furthermore, a partition plate 42 and a first fan 43 or a second fan 44 are incorporated into the support frame 40. The partition plate 42 is sandwiched between the upper and lower halves of the support frame 40 (see FIG. 5), and this partition plate 42 divides the inside of the support frame 40 (inside the casings 11c and 12c) into two upper and lower regions, forming an air intake flow path and an air exhaust flow path, which will be described later. In the first embodiment, a steel plate is used as the partition plate 42, and the fan casing, impeller, motor, etc. of each fan are fixed to the steel plate. In addition, holes 45 provided in the support frame 40 are holes through which cables connecting the control device 70 (see FIG. 7) to the motors of each fan pass.

[0032] In the first embodiment, each fan is installed facing the partition plate 42 (see FIGS. 5 and 6). Furthermore, in the first fan unit 11, the partition plate 42 (421) is provided at an incline so that the flow path in the casing 11c narrows from the outside air inlet 81 toward the downstream side (see FIG. 6). Similarly, in the second fan unit 12, the partition plate 42 (422) is provided at an incline so that the flow path in the casing 12c narrows from the return air inlet 83 toward the downstream side.

[0033] The heat exchange unit 20 has a heat exchange element 21 (see FIG. 6), and inspection covers 60 are provided on the top and bottom of the casing 20c (see FIG. 1, etc.). Therefore, a worker can inspect or replace the heat exchange element 21 provided in the casing 20c of the heat exchange unit 20 through the inspection covers 60. For example, if the heat exchange ventilator 1 is installed above the ceiling, inspection can be performed using the inspection cover 60 provided on the bottom. If the heat exchange ventilator 1 is installed in the underfloor space, inspection can be performed using the inspection cover 60 provided on the top. If the heat exchange ventilator 1 is installed in the space between the first and second floors, inspection can be performed from the second floor using the inspection cover 60 provided on the top, and inspection can also be performed from the first floor using the inspection cover 60 provided on the bottom. On the other hand, the inspection cover 60 can be provided on only one side, i.e., on the bottom surface only when the heat exchange ventilation device 1 is installed above the ceiling, or on the top surface only when the heat exchange ventilation device 1 is installed in the underfloor space. Although the heat exchange element 21 of the first embodiment is a cross-flow type with a diamond-shaped cross section (see FIG. 6), it is also possible to use elements with a different shape, or elements of a counter-flow type with higher heat exchange efficiency than a cross-flow type.The size of the heat exchange unit 20 (casing 20c) can be designed depending on the size and shape of the heat exchange element to be used.

[0034] [Casing] Furthermore, the casings 11c, 12c, and 20c of each unit of the heat exchange ventilator 1 are composed of multiple plate-like members, such as a top plate, a bottom plate, a front plate, a rear plate, and left and right side plates. In the first embodiment, steel plates are used as the plate-like members. Specifically, the casing 12c is composed of a top plate, a bottom plate, a rear plate, and left and right side plates, and has a large opening at the front (see FIG. 4). On the other hand, the casing 11c is composed of a top plate, a bottom plate, a front plate, and left and right side plates, and has a large opening at the rear, similar to the front of the casing 12c. The casing 20c is composed of a top plate, a bottom plate, and left and right side plates, and has large openings at the front and rear. Here, the top plate, bottom plate, and left and right side plates are all made of steel plates of the same shape, so some of the members constituting each unit can be shared.

[0035] In short, in the heat exchange ventilation device 1, the casings 11c, 12c, and 20c of each unit have at least one open side, and the open sides are connected to each other to form the air intake flow path and the air exhaust flow path described below.

[0036] Casings 11c, 12c, and 20c of each unit have first flanges 111a, 111b, 121a, 121b, 201a, and 201b (see FIGS. 1 and 4) that are provided at the upper and lower ends of the peripheral edge of the side surface, have openings 53, and protrude horizontally. Note that although only the right side surface (see FIG. 1) of these first flanges is shown, the left side surface is similar. Additionally, the casings 11c, 12c, and 20c of each unit have second flanges 112a, 112b, 122a, 122b, 202a, and 202b that are provided on the left and / or right edges of the periphery of the side surface and protrude horizontally (see FIGS. 1 and 4). The second flanges are also similar on the left side surface, although only a portion of them is shown (second flanges 122c and 202c shown in FIG. 4).

[0037] 1 and 4, if first flange portions 121a and 121b are formed by portions that fold back from the upper and lower ends of the side panels of casing 12c and protrude horizontally, respectively, and by portions of the top and bottom panels, then screws can be fastened at first flange portions 121a and 121b when assembling casing 12c, preventing screws from getting inside casing 12c. Furthermore, if second flange portion 122b is formed by portions that fold back from the right ends of the side panels of casing 12c and protrude horizontally, and by portions of the back panel, then screws can be fastened at second flange portion 122b when assembling casing 12c, preventing screws from getting inside casing 12c. Therefore, when an operator takes the support frame 40 made of polystyrene foam in and out of the casing 12c to replace a fan or a motor, the support frame 40 does not interfere with the screws because the screws do not protrude into the casing 12c, and the support frame 40 can be taken in and out easily and smoothly, improving work efficiency.

[0038] The first fan unit 11 and the heat exchange unit 20 have a similar configuration, so they can be assembled without screws getting inside the casings 11c and 20c. The first flanges 111a, 111b, 121a, 121b, 201a, and 201b are provided with openings 53, so that each unit can be hung and installed by attaching a hanging bolt H to the openings 53 (see FIG. 1). In the first embodiment, the openings 53 are elongated holes that are long in the front-rear direction, so that each unit can be moved in the front-rear direction and separated (see FIG. 4).

[0039] Furthermore, in the first embodiment, notches 531, 532 are provided in the opening 53 (see FIGS. 1, 2(i), etc.). In the first embodiment, the notches 531 of each fan unit are provided at the end on the heat exchange unit 20 side, and the notch 532 of the heat exchange unit 20 is provided approximately in the center (see FIG. 2(i)).

[0040] Therefore, when installing the heat exchange ventilation device 1, the hanging bolt H is inserted through the notch 532 into the opening 53, and the heat exchange unit 20 is first attached to the hanging bolt H, and then the hanging bolt H is inserted through each notch 531 into the opening 53 (see Figure 4), and each fan unit can be slid back and forth to connect to the heat exchange unit 20 (see Figure 1).

[0041] Furthermore, when inspecting or replacing each unit, the nuts on the hanging bolts H are loosened and removed, and then each fan unit is slid in the opposite direction from when it was installed to separate it from the heat exchange unit 20 (see FIG. 4), and then each fan unit can be removed by sliding the hanging bolts H out of the openings 53 through the cutouts 531. The same applies when removing the heat exchange unit 20. When each unit that has been inspected or replaced is to be attached to the suspension bolt H, the suspension bolt H is inserted into the opening 53 through the notches 531 and 532, and the units are slid forward and backward to connect with each other.

[0042] In this type of work, the suspension bolts H of each unit can be inserted into the openings 53 through the cutouts 531 and 532, so that each unit can be easily attached to the suspension bolts H without having to adjust the height of each unit when attaching it. Similarly, when removing each unit, each unit can be easily removed without having to lower it to the bottom end of the suspension bolt H. The positions at which the notches 531 and 532 are provided are not limited to those in the first embodiment, and the notch 531 may be provided in approximately the center of the opening 53, for example.

[0043] In the first embodiment, the casing 11c and the casing 20c are directly connected by fasteners 50 (see FIGS. 1 and 3). More specifically, hooks 51 are provided on the left and right side surfaces of the casing 11c, and keepers 52 are provided on the left and right side surfaces of the casing 20c (see FIG. 4), which connect the casings 11c and 20c. Furthermore, in the casing 11c, the hooks 51 are provided in portions (recessed portions) of the side panels where the second flanges 112 are not provided, and in the casing 20c, the keepers 52 are provided in portions (recessed portions) of the side panels where the second flanges 202 are not provided.

[0044] Similarly, casing 12c and casing 20c are directly connected by fasteners 50 (see FIGS. 1 and 3). An operator can easily separate the units with one hand by unlocking fasteners 50 (see FIG. 4), but the mechanism for connecting the units is not limited to this.

[0045] [Control device] Additionally, the heat exchange ventilator 1 is equipped with a control device 70 capable of adjusting the airflow rate of each fan (see FIGS. 1, 7, etc.). In the first embodiment, the control device 70 is composed of a main body 71, an operation panel 73, and an operation panel cable 72 connecting these, and the airflow rate of each fan can be adjusted by controlling the motor of each fan from the operation panel 73. In the configuration illustrated in FIG. 7, the operation panel 73 has been removed from the main body 71 in order to explain the operation panel cable 72. In the first embodiment, the control device 70 is attached to the side of the casing 12c (see FIG. 1).

[0046] [Air intake path, exhaust path] By connecting the units together, an air supply flow path that connects the outside air inlet 81 and the air supply outlet 82, and an exhaust flow path that connects the return air inlet 83 and the exhaust outlet 84 are formed in the heat exchange ventilator 1. In the first embodiment, ducts D are connected to the outside air inlet 81 to the exhaust outlet 84, respectively (see FIGS. 1 to 3), but a grill or the like that opens directly into the room can also be connected to the outlet or the inlet.

[0047] To explain the formed flow paths using the air intake flow path as an example, outside air taken in through the outside air inlet 81 passes through the first fan unit 11 (casing 11c) and flows from the open back surface of the casing 11c into the heat exchange unit 20. The air then passes through the heat exchange element 21, where heat exchange takes place, and flows from the open back surface of the casing 20c into the second fan unit 12. The air is then sucked in through the fan inlet 44a by the second fan 44, which operates as an air supply fan, and is supplied indoors through the air intake outlet 82 (see FIG. 6).

[0048] On the other hand, although not shown, the same is true for the exhaust flow path, where indoor air taken in through the return air intake 83 passes through the second fan unit 12 (casing 12c), undergoes heat exchange by the heat exchange element 21, and is discharged outdoors through the exhaust outlet 84 by the first fan 43, which operates as an exhaust fan.

[0049] In the first embodiment, the partition plate 42 is arranged at an angle within the casings 11c, 12c, so that a larger area can be secured for taking in outside air or indoor air into the casings 11c, 12c (in the example shown in Figure 6, the area of ​​the outside air intake port 81 that takes in outside air into the casing 11c), allowing for smoother air intake and exhaust. Furthermore, by arranging the partition plate 42 at an angle, one of the partitioned areas within the casing can be made larger (the lower area in the example shown in Figure 6), and each fan can be installed within that larger area, making it possible to make each fan unit thinner than if the partition plate 42 were arranged horizontally. Note that outside air and indoor air are drawn in through the inlets of each fan and blown out through the outlets, but because partition plate 42 is tilted, for example, fan inlet 44a of second fan 44 provided on partition plate 42 is also tilted so that the inlet surface faces the direction in which outside air, etc. flows (see FIG. 6). Therefore, outside air, etc. can be drawn in more smoothly through fan inlet 44a.

[0050] [Maintenance Procedure] Because the heat exchange ventilator 1 has such a configuration, an operator can easily perform maintenance by following the procedure below.

[0051] (1) Loosen the nuts on the hanging bolts H that secure the first fan unit 11 and the second fan unit 12 (see FIG. 1). (2) Remove the fasteners 50 that fasten the first fan unit 11 and the second fan unit 12 to the heat exchange unit 20 (see FIG. 1). (3) The first fan unit 11 and the second fan unit 12 are slid in a direction away from the heat exchange unit 20 (see FIG. 4). At this time, since the opening 53 is an elongated hole that is long in the front-rear direction, the first fan unit 11 and the second fan unit 12 can be moved in the front-rear direction. (4) Loosen the nuts on the hanging bolts H that secure the heat exchange unit 20 (see FIG. 4), and remove the heat exchange unit 20. (5) Using the space created by removing the heat exchange unit 20, the support frame 40 is removed from the first fan unit 11 and the second fan unit 12 (see FIG. 5. Note that the hanging bolts H that hang the heat exchange unit 20 are omitted in FIG. 5). Then, maintenance of the fans, partition plates 42, and other parts is performed.

[0052] [Installation example] Next, further with reference to FIGS. 8 to 10, an example of installation of the heat exchange ventilator 1 and the like will be described. The heat exchange ventilator 1 is installed in the space behind the ceiling C by being suspended from a structural body S by a suspension bolt H (see FIG. 8). An operator can inspect the heat exchange ventilator 1 through an inspection hatch M provided in the ceiling C.

[0053] In addition, the heat exchange ventilation device 1A (see Figure 9) is a device in which only the configuration of the control device 70 has been changed from the heat exchange ventilation device 1, and as shown in the figure, the control device 70 is connected to a connector 75 provided on the casing 12c via a wiring cable 74. The connector 75 is connected to the motor of the second fan 44 (see FIG. 6) of the second fan unit 12, and the motor of the second fan 44 can be controlled from the control device 70 (operation panel 73) via a wiring cable 74. Therefore, an operator can adjust the airflow rate of the second fan 44 and turn the power on and off from the control device 70 installed near the inspection hatch M.

[0054] The heat exchange ventilator 1B (see FIG. 10) is also a heat exchange ventilator 1 with only the configuration of the control device 70 changed, but as shown in the figure, a long cable 72 for an operation panel extends from a main body 71, and an operation panel 73 is attached inside the room (outside the space behind the ceiling C). Therefore, an operator can adjust the airflow rate of the second fan 44 from inside the room without opening the inspection hatch M. The configuration of the control device 70 in the heat exchange ventilators 1A and 1B can of course also be adopted for the first fan 43. In addition, the air volume of each fan can be remotely adjusted from a controller via wireless communication.

[0055] [Variations] Finally, a heat exchange ventilator according to another embodiment of the present invention will be described using schematic diagrams with reference to Figures 11 and 12. In the heat exchange ventilator according to the present invention, the casings of the units can be directly connected to each other, but they can also be connected as shown in Figure 11.

[0056] [Heat exchange ventilation device according to the second embodiment] For example, a heat exchange ventilator 2 according to a second embodiment of the present invention has a configuration in which each unit is stacked as shown in the figure (see FIG. 11(i)). In addition, in the heat exchange ventilator 2, an outside air inlet 81 and a return air inlet 83 are provided in the heat exchange unit 20, an intake air outlet 82 is provided in the first fan unit 11, and an exhaust air outlet 84 is provided in the second fan unit 12. Note that openings are provided in the casing of each unit to form an exhaust flow path and an intake air flow path.

[0057] Therefore, in the heat exchange ventilator 2, outside air is taken in through the outside air inlet 81 of the heat exchange unit 20, passes through the heat exchange element 21, and is supplied indoors through the supply air outlet 82 of the first fan unit 11. At the same time, indoor air is taken in through the return air inlet 83 of the heat exchange unit 20, passes through the heat exchange element 21, and is discharged outdoors through the exhaust air outlet 84 of the second fan unit 12.

[0058] In addition, when such a stacked structure is used, the heat exchange ventilation device 2 can be easily constructed by, for example, fixing the first flange portion 111a provided on the upper surface of the first fan unit 11 and the first flange portion 210b provided on the bottom surface of the heat exchange unit 20 by inserting bolts, nuts, etc. into their respective openings 53 (see Figure 1).

[0059] [Heat exchange ventilation device according to the third embodiment] On the other hand, a heat exchange ventilator 3 according to a third embodiment of the present invention has a configuration that includes an air passage unit 30 in addition to the configuration of the heat exchange ventilator 2 (see FIG. 11(ii)). Note that the casing of each unit and the air passage unit 30 are provided with openings for forming an exhaust flow path and an intake air flow path.

[0060] Therefore, in the heat exchange ventilator 3, outside air is taken in through the outside air inlet 81 of the heat exchange unit 20, passes through the heat exchange element 21, passes through the air path unit 30, and is supplied indoors through the supply air outlet 82 of the first fan unit 11. At the same time, indoor air is taken in through the return air inlet 83 of the heat exchange unit 20, passes through the heat exchange element 21, passes through the air path unit 30, and is discharged outdoors through the exhaust outlet 84 of the second fan unit 12.

[0061] [Heat exchange ventilation device according to the fourth embodiment] Furthermore, a heat exchange ventilator 4 according to a fourth embodiment of the present invention has a configuration in which each unit is stacked as shown in the figure (see FIG. 11(iii)). Furthermore, in the heat exchange ventilator 4, each unit is provided with an inlet and an outlet in the same configuration as the heat exchange ventilators 2 and 3, but the first fan unit 11 and the heat exchange unit 20, and the second fan unit 12 and the heat exchange unit 20 are connected by ducts D, respectively.

[0062] Therefore, in the heat exchange ventilator 4, outside air is taken in through the outside air inlet 81 of the heat exchange unit 20, passes through the heat exchange element 21, and is supplied indoors through the supply air outlet 82 of the first fan unit 11 via duct D. At the same time, indoor air is taken in through the return air inlet 83 of the heat exchange unit 20, passes through the heat exchange element 21, and is exhausted outdoors through the exhaust air outlet 84 of the second fan unit 12 via duct D.

[0063] [Heat exchange ventilation device according to the fifth embodiment] Furthermore, the heat exchange ventilator 5 according to the fifth embodiment of the present invention has a stacked structure similar to that of the heat exchange ventilators 2 and 3 (see FIG. 11(iv)), and the first fan 43 of the first fan unit 11 operates to push out outside air.

[0064] Therefore, in the heat exchange ventilator 5, outside air is taken in through the outside air inlet 81 of the first fan unit 11, passes through the heat exchange element 21 of the heat exchange unit 20, and is supplied indoors through the supply air outlet 82. At the same time, indoor air is taken in through the return air inlet 83 of the heat exchange unit 20, passes through the heat exchange element 21, and is discharged outdoors through the exhaust air outlet 84 of the second fan unit 12.

[0065] [Heat exchange ventilation device according to the sixth embodiment] Moreover, a heat exchange ventilator 6 according to a sixth embodiment of the present invention has a configuration including an air passage unit 30 in addition to the configuration of the heat exchange ventilator 5 (see FIG. 11(v)).

[0066] Therefore, in the heat exchange ventilator 6, outside air is taken in through the outside air inlet 81 of the first fan unit 11, passes through the air path unit 30, passes through the heat exchange element 21 of the heat exchange unit 20, and is supplied indoors through the supply air outlet 82. At the same time, indoor air is taken in through the return air inlet 83 of the heat exchange unit 20, passes through the air path unit 30, passes through the heat exchange element 21, and is discharged outdoors through the exhaust outlet 84 of the second fan unit 12.

[0067] [Heat exchange ventilation device according to the seventh embodiment] Additionally, the heat exchanger ventilator 7 according to the seventh embodiment of the present invention is provided with a partition plate 42 that divides the interior of the casings 11c, 12c into two left and right regions. Furthermore, the heat exchanger ventilator 7 is provided with an outside air inlet 81 and an exhaust outlet 84 in the first fan unit 11, and with a supply air outlet 82 and a return air inlet 83 in the second fan unit 12.

[0068] Since the second fan 44 operates as an air supply fan, in the heat exchange ventilator 7, outside air is taken in through the outside air inlet 81 of the first fan unit 11, passes through the heat exchange element 21, and is supplied indoors through the air supply outlet 82 of the second fan unit 12. At the same time, indoor air is taken in through the return air inlet 83 of the second fan unit 12, passes through the heat exchange element 21, and is discharged outdoors through the exhaust outlet 84 of the first fan unit 11.

[0069] In this way, the configuration of the heat exchange ventilation device according to the present invention can be freely changed to suit the space in which the heat exchange ventilation device is installed, such as the attic or underfloor space.

[0070] The heat exchange ventilator described above is one example of an embodiment of the heat exchange ventilator according to the present invention, and the present invention is not limited to these configurations as long as the gist of the present invention is not changed. For example, the heat exchange ventilator according to the present invention can be installed on the floor or on a wall in the attic or under the floor, etc. Furthermore, the heat exchange ventilator according to the present invention can have a configuration other than that of heat exchange ventilator 1 to heat exchange ventilator 7 by changing the configuration of the intake / exhaust ports and the connection configuration of each unit. [Industrial Applicability]

[0071] The heat exchange ventilation device of the present invention can be installed in limited spaces such as the attic or underfloor space of a house, or the space between floors, and is a heat exchange ventilation device with high maintenance efficiency, so it can be used in a variety of locations and for a variety of purposes, and is industrially useful. [Explanation of symbols]

[0072] 1,1A,1B,2,3,4,5,6,7 Heat exchange ventilation equipment 11 First Fan Unit 11c Casing of the first fan unit 111a, 111b, 121a, 121b, 201a, 201b First flange portion 112a, 112b, 122a, 122b, 122c, 202a, 202b, 202c second flange portion 12 Second Fan Unit 12c Casing of second fan unit 20 Heat Exchange Unit 20c Heat exchange unit casing 21 Heat exchange element 30 Air duct unit 40 Support frame 41 Flow path member 42,421,422 Partition board 43 First Fan 44 Second Fan 44a Fan intake 45 Cable hole 50 Fasteners 51 Hook 52 Keeper 53 Opening (long hole) 531,532 notch 60 Inspection cover 70 Control device 71 Main body 72 Operation panel cable 73 Operation Panel 74 Wiring Cable 75 connectors 81 Fresh air intake 82 Air supply and discharge port 83 Return air intake 84 Exhaust outlet T-duct connection short pipe D duct H Hanging bolt C Ceiling M Inspection hatch S structure

Claims

1. A heat exchange ventilation device having an outside air inlet that takes in outside air, an intake air outlet that supplies the outside air indoors, a return air inlet that takes in indoor air, and an exhaust air outlet that discharges the air outdoors, which exchanges heat between the outside air taken in from outdoors and air taken in from indoors and supplies the air indoors, a first fan unit having at least one of an inlet and an outlet and a first fan; a second fan unit having at least one of an inlet and an outlet and a second fan; a heat exchange unit having a heat exchange element, the first fan unit, the second fan unit, and the heat exchange unit have casings that are directly connectable to and separable from each other; A heat exchange ventilation device in which the first fan unit, the second fan unit, and the heat exchange unit are connected to form an exhaust flow path connecting the return air intake and the exhaust outlet, and an air supply flow path connecting the outside air intake and the air supply outlet.

2. A heat exchange ventilation device having an outside air inlet that takes in outside air, an intake air outlet that supplies the outside air indoors, a return air inlet that takes in indoor air, and an exhaust air outlet that discharges the air outdoors, which exchanges heat between the outside air taken in from outdoors and air taken in from indoors and supplies the air indoors, a first fan unit having at least one of an inlet and an outlet and a first fan; a second fan unit having at least one of an inlet and an outlet and a second fan; a heat exchange unit having a heat exchange element; an air duct unit; the first fan unit, the second fan unit, the heat exchange unit, and the air passage unit have casings that are directly connectable to and separable from each other; A heat exchange ventilation device in which the first fan unit, the second fan unit, the heat exchange unit, and the air duct unit are connected to form an exhaust flow path connecting the return air intake and the exhaust outlet, and an air supply flow path connecting the outside air intake and the supply air outlet.

3. The casing of the first fan unit, the second fan unit, and the heat exchange unit includes: A heat exchange ventilation device as described in claim 1 or 2, which has a first flange portion having an opening and protruding horizontally, provided at the upper or / and lower end of the peripheral edge of the side surface, and / or a second flange portion having an opening and protruding horizontally, provided at the left or / and right end of the peripheral edge of the side surface.

4. a support frame in which a flow path member, a partition plate, and the first fan or the second fan are integrated, the support frame is detachably provided in a casing of the first fan unit and a casing of the second fan unit, the partition plate is provided on the flow path member and partitions the insides of the casings of the first fan unit and the second fan unit to form the exhaust flow path and the intake air flow path, The heat exchange ventilation device according to claim 1 , wherein the first fan and the second fan are disposed facing the partition plate.

5. The heat exchange ventilation device according to claim 4, wherein the partition plate is inclined so that the flow path within the casing of the first fan unit or the second fan unit narrows downstream from the outside air intake port or the return air intake port.

6. 2. The heat exchange ventilation system according to claim 1, wherein inspection covers are provided on the top and bottom of the casing of the heat exchange unit.

7. a control device capable of adjusting the airflow rates of the first fan and the second fan; The heat exchange ventilation device described in claim 1 or 2, wherein the control device is connected via a wiring cable to connectors connected to the motors of the first fan and the second fan, which are provided in the casing of the first fan unit and the casing of the second fan unit, respectively.

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