JP2022083366A - Total heat exchange type ventilation unit with less contamination - Google Patents

Abstract

To solve the problem that since a water vapor selective permeable film has low strength because it is a thin film, although conventional total heat exchangers using the water vapor selective permeable film use a metal or plastic formwork or metal wire to hold the water vapor selective permeable film, as a result, the conventional total heat exchangers have a low degree of freedom for shape and are heavy and large-sized, which leads to the drawback that they are not suitable for a ventilation system with a large ventilation volume.SOLUTION: A corrugated support structure made of a lightweight sheet material is sandwiched between two water vapor selective permeable films to form a ventilation path unit; after the ventilation path units are further laminated with the corrugated support structure at regular intervals, it is possible to manufacture a flexible and high-strength ventilation unit that is lightweight and has high impact resistance by being stored in a tight state inside a housing. The ventilation unit realizes a total heat exchange type ventilation device that is lightweight, highly efficient and does not cause contamination.SELECTED DRAWING: Figure 5

Description

The present invention is a ventilation device that introduces fresh outside air into indoor spaces such as residences, offices, commercial facilities, gymnasiums, event venues, factories, and vehicles. The present invention relates to a ventilation device capable of performing heat exchange with high efficiency and preventing the dirt component contained in the exhausted indoor air from being mixed with the introduced outside air and returning to the room.

In recent years, epidemics caused by viruses such as COVIT-19 have spread worldwide, and active ventilation of living rooms and business establishments is encouraged as a countermeasure.
However, introducing the outside air into the room and discharging the room air to the outside in cold weather or high humidity means that the latent heat of the heat and water vapor stored in the room air is discarded to the outside, which is an additional energy for air conditioning. In addition to the need for water vapor, there are issues such as impaired resident comfort.

The introduction of air conditioning equipment is increasing worldwide, and the amount of energy used is also expanding. Since this is also a cause of global warming, reducing the energy consumption of air conditioning equipment is an urgent issue.

On the other hand, in houses, offices, offices, etc., the airtightness of living spaces has been promoted for energy saving, but the airtightness of living spaces promotes the spread of infection by viruses such as COVIT-19. It is necessary to achieve both active ventilation and energy saving.

In response to this situation, in recent years, a water vapor selective permeable membrane that selectively allows only water vapor to pass through has appeared. This function has been confirmed in sheets carrying special resins such as polymer sorbents and fluororesins, or resin thin films, and air with low relative humidity from one side in contact with air with high relative humidity. It has the property of allowing only water vapor to pass toward the other surface in contact with.

However, since these water vapor selective permeable membranes are thin films, when exchanging water vapor or heat through the membranes, the strength to withstand the pressure difference between the air flows and the wind flow is required. In the conventional technique, since the water vapor selective permeable membrane is fixed to a metal or plastic frame material, there are restrictions on the frame material, the shape of the device is restricted, and there are drawbacks such as an increase in weight and size.

For example, in the following Patent Documents 1 and 2, the water vapor selective permeable film is adhered to the opening of a thin plate of metal or plastic, or the hygroscopic agent itself is applied to the opening of a fine wire mesh to select water vapor with strength. A desiccant ventilation system that forms a permeable membrane has been proposed.

Patent No. 4341924 Patent No. 6352915

In the ventilation unit that is a component of the desiccant ventilation system described in Patent Documents 1 and 2, the water vapor selective permeation is performed in order to maintain the shape of the heat exchange unit that exchanges total heat between both fluids when the introduced outside air and the indoor exhaust flow. The film is bonded or coated on the frame material that is the reinforcing member. For this reason, the manufacturing process of the ventilation unit and the heat exchange unit becomes complicated, and there are problems such as cost increase and restrictions on the shape of the heat exchange unit.

A main object of the present invention is to firmly hold the steam selective permeable film with a lightweight member in order to solve this problem, and to exchange total heat between the introduced outside air and the indoor exhaust through the steam selective permeable film. In addition, we provide a heat exchange unit that does not return to the room due to contamination such as harmful substances including viruses contained in the room exhaust and a ventilation unit that houses the heat exchange unit, making the ventilation device lighter, more compact, and lower in cost. In addition, the purpose is to improve the total heat exchange efficiency and to popularize a contactless ventilation device such as COVIT-19, which is also effective as a countermeasure against highly infectious viruses.

The ventilation device that realizes highly efficient total heat exchange and contaminationless according to the present invention includes an outside air introduction duct (1-1) that introduces the outside air (1) into the room (2) and an exhaust that exhausts the room air to the outside. The heat exchange unit (5) is housed in the housing (4) of the ventilation unit (3) to which the duct (2-1) is connected, and the heat exchange unit (5) has a corrugated plate shape (corrugated shape). Alternatively, a ventilation passage A formed by sandwiching a triangular folded plate-shaped support structure (6) between two steam selective permeable films (7) in a sandwich shape and another support member is used. By laminating the ventilation passages A at regular intervals, a heat exchange unit (5) having a ventilation passage B is formed between the ventilation passages A, and a cushion plate (13) is formed on the bottom surface and the upper surface of the heat exchange unit (5). Is adhered to the inner wall surface of the housing (4) via a fixture (10).
An inlet / outlet (4-1) for outside air and indoor air is provided on the side surface of the housing (4), and the ventilation passage A and the ventilation passage B of the heat exchange unit (5) fixed in the housing (4). Form an air flow to.
In the heat exchange unit (5), heat and water vapor are exchanged between the air passage A and the air flow flowing through the air passage B via the water vapor selective permeable membrane (7).

Water vapor molecules in the air are trapped on the surface of the air on the air side with high relative humidity due to the relative humidity difference between the air in contact with one surface of the water vapor selective permeability film (7) and the air in contact with the other surface. It becomes molecules, is absorbed into the membrane, and the absorbed water molecules move in the membrane and are released into the air on the air side with low relative humidity, and only water vapor selectively permeates the membrane.
Further, the water vapor selective permeable membrane (7) to be adopted has a membrane thickness of 0.5 mm or less, has a small thermal resistance during heat transfer through the membrane, and has air passing through the air passage A and the air passage B. The heat exchange between them is also good.

Further, the sheet thickness of the corrugated plate-shaped (corrugated) or triangular folded plate-shaped support structure (6) installed in the ventilation passage A and the ventilation passage B is 0.1 mm or more, and the sheet material is short. The heat exchange unit laminate consisting of the air passage A or the air passage B is lightweight and highly flexible because of the corrugated shape at the pitch, and the flow directions of the air flowing down in the air passage A and the air passage B are orthogonal to each other. Since each support structure (6) is configured so as to do so, the strength of the heat exchange unit (5) is also sufficient.

Further, in the present invention, since the corrugated plate-shaped (corrugated) or triangular folded plate-shaped support structure (6) and the water vapor selective permeability film (7) are adhered to each other, the ventilation passage A and the ventilation passage B are bonded. Since the strength of the heat exchange unit (5) made of laminated layers is secured, and the heat exchange unit (5) and the fixture (10) are bonded and then stored and bonded to the inner wall surface of the housing (4). In addition to preventing the entry of passing air from the ridgeline portion of the heat exchange unit (5), the strength of the ventilation unit (3) is also ensured.
Therefore, the shape change of the ventilation passage A and the ventilation passage B, the heat exchange unit (5), and the heat exchange unit (5) generated by the difference in air pressure when the introduced outside air and the exhaust from the room pass through the steam selective permeable membrane (7). Deformation / damage of the ventilation unit (3) is prevented.

Further, in the present invention according to claim 4, when a plurality of heat exchange units (5) formed in a state where the ventilation passages A and the ventilation passages B are alternately laminated are installed in the housing (4), respectively. Each heat exchange unit (5) is installed in the housing (4) so that the ventilation passage A of the heat exchange unit (5) is connected in the flow direction. At that time, an inlet and an outlet for air passing through the ventilation passage A are provided on a pair of side surface portions (4-1) which are short sides of the housing (4), and a pair of long sides of the housing (4) are provided. A plurality of inlets and outlets for air passing through the ventilation passage B are installed on the side surface portion (4-2), and the air discharged from the side outlet on the long side thereof makes a u-turn and is adjacent to the side inlet on the long side again. A u-turn duct (4-3) leading to the ventilation path B of another heat exchange unit (5) was installed. As a result, the air flow passing through the ventilation path B becomes a zigzag flow with respect to the air flow traveling straight through the ventilation path A. As a result, the ventilation unit (3) having high total heat exchange efficiency can be provided because the heat transfer or water vapor transfer between the two fluids can be configured as a condition close to the countercurrent.

Further, in the present invention according to claim 5, the heat exchange units (5) which are in contact with each other after having a substantially square bottom surface shape of a plurality of heat exchange units (5) in which the air passages A and B are alternately laminated. ) Is bonded and fixed by the fixture (10), so that air leakage from the stacking direction (vertical) ridges of each heat exchange unit (5) is prevented and at the same time, the housing Installation as a heat exchange unit group (8) in the body (4) has become easier.
Further, since all of the other stacking direction (longitudinal) ridges of the heat exchange unit (5) were adhesively fixed to the inner wall surface of the housing (4) via the fixture (10), the heat exchange unit (5) It is possible to prevent air from leaking from the ridgeline portion in the stacking direction (vertical direction) and firmly fix it to the housing (4).

In addition, a pair of air inlets / outlets (4-1) are installed on the side surface portion on one short side of the housing (4), and a pair of air is also provided on the side surface portion on the short side side opposite to the housing. Since the doorway is installed, the air flowing in from the entrance on the short side of the housing passes diagonally through the ventilation path in the heat exchange unit (5) and then flows in from the ventilation path of the adjacent heat exchange unit (5). Proceed diagonally again. Similarly, the air flowing in from the other inlet installed on the other short side (4-1) of the housing (4) travels diagonally through another ventilation path in the heat exchange unit (4). It flows into the ventilation path of the adjacent heat exchange unit (5) again and takes a path that travels diagonally through the ventilation path. As a result, the two air flows that flow while passing through the space (14) and (15) composed of the inner wall surface of the heat exchange unit (5) and the housing (4) are orthogonal to each other in the heat exchange unit (5). While doing so, highly efficient total heat exchange is formed as a countercurrent type zigzag flow that exchanges heat and water vapor through the water vapor selective permeable film.

As described above, according to the present invention, the apparent heat (heat energy added by the air conditioning load for hot or cold heat) and latent heat (for humidification or dehumidification) possessed by the indoor air when the indoor air is discharged to the outside of the room. A total heat exchange type ventilation unit is formed that transfers the heat energy added to the heat to the outside air with high efficiency.
In addition, contamination of harmful substances (for example, carbon dioxide, bacteria, viruses, ammonia, etc.) contained in the indoor air is prevented from being transferred to the introduced outside air and returning to the indoor air.
From this effect, it becomes possible to provide a high-performance total heat exchange type contaminationless ventilation unit that introduces clean outside air with low energy consumption even in the season when the air conditioning load increases in winter and summer.

It is an image diagram showing the function that water vapor is exchanged in a ventilation path when the introduced outside air and the exhaust gas from a room move through the ventilation path through the water vapor selective permeable membrane which is an important technique of the present invention. It is a configuration schematic diagram which showed the structure of the ventilation path A which is a basic form of this invention, and the situation where the ventilation path A is laminated in a heat exchange unit. It is a schematic diagram which shows the structure of the heat exchange unit which is an example of the basic form of this invention. A situation is also shown in which the non-openings of the vent passage A and the vent passage B are sealed with putty to prevent air leakage. It is a top view which shows the structural outline of the total heat exchange type contaminationless ventilation unit which concerns on 1st Embodiment of this invention. It is a top view which shows the structural outline of the total heat exchange type contaminationless ventilation unit which concerns on 2nd Embodiment of this invention.

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

First form example

The total heat exchange type contourless ventilation device according to the first embodiment of the present invention has a supply duct (1-1) for guiding the outside air (1) into the room and a room (2) to the room as shown in FIG. It consists of an exhaust duct (2-1) that exhausts air to the outside, a total heat exchange type contourless ventilation unit (3), and a ventilation fan (11) installed in each air duct (not shown). Will be done.

The total heat exchange type contourless ventilation unit (3) has a heat exchange unit group (8) composed of a housing (4) and a plurality of heat exchange units (5) installed inside the housing (4). The heat exchange unit group (8) has an air flow path to which the respective ventilation passages A and B are connected. However, the flow may be formed via the ventilation passage B next to the ventilation passage A.
Further, the heat exchange units (5) constituting the heat exchange unit group (8) may be in contact with each other, but it is desirable to install them at a slight interval.

In the heat exchange unit (5), a plurality of ventilation passages A are laminated at regular intervals via a corrugated plate-like (corrugated) support structure (6), and the ventilation passage B is formed between the ventilation passages A. ..
The ventilation path A is composed of two water vapor selective permeable membranes (7) and a corrugated plate-shaped (corrugated) support structure (6), and the corrugated plate-shaped (corrugated) support structure (6). ) Is preferably installed over the entire surface of the water vapor selective permeable membrane (7).
Similarly, in the ventilation passage B, the corrugated plate-shaped (corrugated) support structure (6) that defines the height interval in the stacking direction of the ventilation passage A covers the entire surface of the water vapor selective permeable membrane (7) of the ventilation passage A. It is desirable that it is installed.
The water vapor selective permeable film (7) of the air passage A, the corrugated plate-shaped (corrugated) support structure (6), and the corrugated plate-shaped (corrugated) support structure (6) forming the air passage B are respectively. Is adhesively fixed to the water vapor selective permeable film (7), but at the side end of the air passage A or the air passage B in the air flow direction, the end of the corrugated support structure (6) and the water vapor. The ends of the selective permeable film (7) are bonded to each other and finished with a putty (12) so that air leakage does not occur.
The putty (12) may be an adhesive, and is adhered to both the upper and lower water vapor selective permeable membranes (7) and the corrugated support structure (6) at the side end portions of the ventilation passages A and B to be adhered to the side surface ends. It is finished so that air does not leak from the part.

Further, the corrugated plate-shaped (corrugated) support structure (6) of the ventilation path A and the corrugated (corrugated) support structure (6) of the ventilation path B select water vapor in a direction in which the flow directions are orthogonal to each other. It is adhesively fixed to the permeable film (7).

The bottom surface of the housing (4) for accommodating the heat exchange unit group (8) composed of a plurality of heat exchange units (5) is rectangular, and the side surface of the housing on the short side thereof is exposed to the outside air (1) from the outside. The outside air introduction duct (1-1) that guides the outside air is connected, and the outside air introduction duct (1-1) that guides the outside air that has passed through the heat exchange unit group (8) to the room (2) is connected to the side surface of the housing on the opposite side. It is connected.
On the other hand, an exhaust duct (2-1) that exhausts indoor air from the room (2) to the outside is connected to the side surface on the long side of the housing (4), and flows in from the exhaust duct (2-1). The indoor air passes through the ventilation passage B of the first heat exchange unit (5), passes through the side opening on the opposite side of the housing (4), flows out from the housing (4), and then flows out from the housing (4), and then outside the opening. It returns to the inside of the housing (4) via the U-turn flow path (4-3) installed in, and flows into the ventilation passage B of the next heat exchange unit (5).

In this way, the exhaust from the room (2) flows into the housing (4) from the side opening on the long side of the housing (4), and then the ventilation passage B of the first heat exchange unit (5). After passing through, the zigzag flow via the U-turn flow path (4-3) is repeated, and the exhaust duct (4) connected to the housing (4) via the final heat exchange unit (5) of the heat exchange unit group (8). It is exhausted to the outside through 2-1).

The outside air (1) from the outside passes through the ventilation passages A of the plurality of heat exchange units (5) installed in the housing (4) of the ventilation unit (3) in a straight line, and at the same time from the room (2). The exhaust of the heat exchange unit (4-3) is a heat exchange unit (4-3) while the flow direction is u-turned by the ventilation passage B of the plurality of heat exchange units (5) and the u-turn flow path (4-3) installed on the side surface on the long side of the housing (4). It passes through the ventilation passage B of 5).
As a result, when the outside air after passing through the ventilation unit (3) is supplied to the room, the temperature and the absolute humidity are close to the temperature and the absolute humidity of the room air.

Next, the advantages of the total heat exchange type contaminationless ventilation unit according to the present invention will be described with reference to the principle diagram of FIG.

The water vapor selective permeable membrane (7) is supported on the surface of a resin having a function of trapping water vapor molecules in the air.
The trapped water vapor molecules are in the form of water molecules and are incorporated into the resin.
The incorporated water molecules move in the resin and reach the opposite surface of the water vapor selective permeable membrane (7). When the relative humidity of the air in contact with the opposite surface is low, the water molecules that have passed through the water vapor selective permeable film (7) evaporate as water vapor into the air having a low relative humidity.
When water vapor is trapped, there is heat generated when the phase changes from water vapor to water, and this heat is transmitted to the opposite surface of the water vapor selective permeable film, where it is consumed as heat of vaporization when water evaporates. Therefore, strictly speaking, the transfer of heat due to the phase change occurs at the same time as the transfer of water molecules.
That is, the water vapor selective permeable membrane (7) has a high heat transfer function because water molecules can move inside and the film thickness is thin. These characteristics make it possible to selectively transfer only water vapor.

Second form example

Next, the total heat exchange type contaminationless ventilation device according to the second embodiment of the present invention will be described with reference to FIG.

Although the ventilation device of the total heat exchange type contaminationless is not shown, a ventilation fan (11) for blowing out the outside air introduced from the outside and the exhaust from the room is installed inside or outside each air duct or ventilation unit. There is. Further, as shown in FIG. 5, the total heat exchange type contaminationless ventilation system has a supply duct (1-1) that guides the outside air (1) from the outside to the room 2 and an indoor air from the room (2) to the outside. It is composed of an exhaust duct (2-1) for discharging, a ventilation unit (3), a heat exchange unit (5), and the like.

The ventilation unit (3) has a housing (4) and a plurality of heat exchange units (5) installed inside the housing (4), and the heat exchange unit (5) has a ventilation path A. It is composed of a laminated body of ventilation passages B, the bottom surface shape of which is square, and each heat exchange unit (5) is joined to each other via a fixture (10) at a ridgeline in the stacking direction (longitudinal direction) to form a group of heat exchange units. (8) is configured.
Further, in the heat exchange unit group (8), all the ridges in the stacking direction (vertical direction) of the heat exchange units are joined to the inner surface of the housing (4) via the fixture (10).
A pair of air inlets and outlets are installed on both side surfaces of the housing (4) on the short side. That is, the air inlet / outlet at one of the short side ends of the housing (4) is connected to the outside air introduction duct (1-1), and the outside air flowing in from there is the first heat exchange unit (5). ) Inflows into the heat exchange unit (5) from the opening of the ventilation passage A or the ventilation passage B, and then flows out into the space (14) surrounded by the inner surfaces of the heat exchange unit (5) and the housing (4). ..
The outside air flowing out to the space (14) flows into the next heat exchange unit (5) from the opening of the ventilation passage A or the ventilation passage B of the heat exchange unit (5) on the downstream side.
This flow is repeated, and the outside air flowing in from the outside air introduction duct (1-1) through the opening at one end of the housing 4 is the outside air introduction duct (1-1) installed on the short side of the housing on the opposite side. Head to the room (2) via.

Similarly, the exhaust from the room (2) through the exhaust duct (2-1) from the opening at the short side end of the housing (4) on the side opposite to the inlet side of the outside air (1) is the housing (4). ), Flowed into the opening of the ventilation passage A or the ventilation passage B of the first heat exchange unit (5), and then surrounded by the inner surface of the heat exchange unit (5) and the housing (4). It flows out to the space (15).
The air flowing out to the space (15) flows into the next heat exchange unit (5) through the opening of the ventilation passage A or the ventilation passage B of the next heat exchange unit (5) on the downstream side.
By repeating this flow, the indoor air flowing in from the inlet at one end of the housing (4) flows out to the outside through the exhaust duct (2-1) installed on the short side of the housing on the opposite side.

In this way, the heat exchange unit group (8) composed of a plurality of heat exchange units (5) installed inside the housing (4) of the ventilation unit (3) in which the outside air introduced from the outside and the exhaust from the room are exhausted. Within, they form opposite zigzag flows. Due to this countercurrent effect, heat and water vapor exchange can be achieved with high efficiency in the individual heat exchange units (5) via the water vapor selective permeable membrane (7).

In the total heat exchange type controllerless ventilation unit configured in this way, in the heat exchange unit (5) installed in the ventilation unit (3), the outside air introduced from the outside to the room and the outside air discharged from the room to the outside are discharged. When the exhaust air passes through the ventilation passage A and the ventilation passage B independently, heat and water vapor are exchanged with high efficiency through the thin water vapor selective permeable film (7), and at that time, from the room. Since the contamination of harmful substances (for example, carbon dioxide, bacteria, viruses, ammonia, etc.) contained in the exhaust of the air cannot pass through the water vapor selective permeable film (7), there is no concern that the harmful substances in the exhaust will return to the room.

Further, by installing a plurality of heat exchange units (5) installed in the ventilation unit (3) as a heat exchange unit group (8), the outside air introduced from the outside to the room and the outside air discharged from the room to the outside are discharged. Since the flow of the exhaust gas to be generated can form a countercurrent flow that is zigzag with each other, heat and water vapor can be exchanged more efficiently between the introduced outside air and the exhaust gas from the room.

Further, when exchanging heat and water vapor through the water vapor selective permeable film (7), a corrugated plate (corrugated) or a triangular folded plate is formed over the entire surface of the water vapor selective permeable film (7). Since the support structure (6) is adhered to the water vapor selective permeable film (7) in the direction orthogonal to each other to form the air passage A or the air passage B, the heat exchange unit (5) is lightweight and lightweight. The shape is resistant to compression and vibration.

Further, the side surfaces of the ventilation passages A and B formed by the corrugated plate-shaped (corrugated) or triangular folded plate-shaped support structure (6) bonded to both sides of the water vapor selective permeability film (7). In addition to applying adhesive putty (12) to the edges to prevent air leakage from the sides of the edges,
Even in the stacking direction (longitudinal) ridgeline portion of the heat exchange unit (5), a fixture (10) is installed at the connection portion between the heat exchange units (5) or the connection portion with the inner side surface of the housing (4). However, since the stacking direction (vertical direction) ridges of the fixture (10) and the heat exchange unit (5) and the housing are joined with an adhesive, air leakage and mixing from these parts are prevented. There is.

1: Outside air, 1-1: Outside air introduction duct 2: Indoor, 2-1: Exhaust duct 3: Ventilation unit 4: Ventilation unit housing 4-1 and 4-2: Housing air inlet / outlet 4-3 : U-Turn flow path installed in the housing 5: Heat exchange unit 6: Support structure 7: Steam selective permeable film 8: Heat exchange unit group 10: Fixture (used for connecting and fixing the heat exchange unit)
11: Fan 12: Putty or adhesive 13: Cushion plate 14, 15: Space ventilation path formed by the heat exchange unit and the housing ... Ventilation composed of two water vapor selective permeable films and a support structure. Path Ventilation Path B: A ventilation path composed of two ventilation paths A and a support structure.

Claims (5)

A corrugated (corrugated) or triangular folded plate-shaped support structure is sandwiched between two water vapor selective permeable membranes, and the water vapor selective permeable membrane and the water vapor selective permeable membrane are covered over the entire area of the water vapor selective permeable membrane. A ventilation path A formed by adhering a corrugated plate-shaped (corrugated) or triangular folded plate-shaped support structure, and
A plurality of the ventilation passages A are laminated at regular intervals over the entire area of the ventilation passage A by another corrugated plate-like (corrugated) or triangular folded plate-like support structure to ventilate between the ventilation passages A. A heat exchange unit in which the path B is formed,
After installing two cushion plates on the upper and lower sides of the heat exchange unit, the heat exchange unit is hermetically stored in a housing having a predetermined ventilation opening connected to a predetermined ventilation duct on the side surface, and the air flow and the ventilation path flowing through the ventilation path A. A ventilation unit characterized in that heat and water vapor are exchanged with and from the air flow flowing through B via a water vapor selective permeable film. In the ventilation unit described in the preceding paragraph, the distance between the ventilation passage A and the ventilation passage B laminated and installed in the heat exchange unit in the stacking direction is a constant value.
The direction of the corrugated plate-shaped (corrugated) or triangular folded plate-shaped support structure installed in the ventilation passage B is the corrugated plate-shaped (corrugated) or triangular folded plate-shaped installed in the ventilation passage A. A ventilation unit characterized by being orthogonal to the orientation of the support structure. In the ventilation unit according to claims 1 and 2,
The bottom shape of the ventilation unit housing is rectangular,
The bottom surface shape of the plurality of heat exchange units housed in the housing is rectangular.
Air inlets and outlets are installed on a pair of side surfaces on the short side of the housing.
The air flowing in from the air inlet on the short side goes straight through the air passage A or the air passage B of each heat exchange unit, and flows out from the air outlet on the short side on the opposite side.
An air inlet and an outlet, and an air outlet and an inlet for making a U-turn are also installed on the pair of side surfaces on the long side of the housing.
The air flowing in from the air inlet on the long side passes through the air passage A or the air passage B of the first heat exchange unit, and then passes through the outlet on the side surface on the long side opposite to the housing, and then the casing. After passing through the Uturn path installed on the side surface of the body, it flows into the housing again from the entrance on the side surface on the long side, proceeds to the ventilation path A or the ventilation path B of the next heat exchange unit, and then goes through the Uturn path to the next. It is configured to pass through the heat exchange unit of the above and finally flow out from the air outlet on the side surface on the long side of the housing.
The air that has flowed in from the air inlet on the short side of the housing and the air that has flowed in from the inlet on the long side of the housing are orthogonal to each other in the air flow paths in the plurality of heat exchange units in the housing.
A ventilation unit characterized in that heat and water vapor are exchanged in each heat exchange unit via a water vapor selective permeable membrane. In the ventilation unit according to claims 1 and 2,
The bottom shape of the multiple heat exchange units housed in the housing of the ventilation unit is square.
The stacking direction (longitudinal) ridges of the heat exchange units are joined to each other to form a heat exchange unit group composed of a plurality of heat exchange units.
All of the other stacking direction (longitudinal) ridges of the heat exchange unit group are joined to the side surface of the inner wall of the housing of the ventilation unit in an air tight manner.
A ventilation unit characterized in that the entrances and exits of the outside air and the exhaust are installed independently on both sides of the short side of the housing, and the flow path configuration is such that the outside air and the exhaust proceed in opposite directions. In the ventilation unit according to claims 4 and 5.
The multiple heat exchange units housed in the housing of the ventilation unit have a one-sided cardboard shape in which a corrugated plate-shaped (corrugated) or triangular folded plate-shaped support structure is adhered to one side of the water vapor selective permeable film. The heat exchange unit is made by cutting the material of A ventilation unit characterized by being formed.

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