JP5182870B2 - Heat exchange ventilation method of building - Google Patents

Description

  The present invention relates to a ventilation path switching device for switching a ventilation path of a building, a heat exchange ventilation system for a building including the ventilation path switching device, and a heat exchange ventilation method for a building performed by the heat exchange ventilation system. .

  Conventionally, buildings such as detached houses have been highly insulated and airtight, but in such buildings, heat loss due to ventilation is reduced to further save energy, and at the same time, fresh air introduced from the outside In order to reduce the temperature difference between the air and the room air and improve the comfort during ventilation, the dirty air exhausted from the room is sucked into one place and introduced from the outside using a ventilator with a heat exchanger A ventilation system has been proposed that exchanges heat with fresh air as needed.

An example of such a ventilation system is disclosed in Patent Document 1. The ventilation system of Patent Document 1 is provided with a passage through which airflow flows under the floor, wall, and ceiling of an outer heat-insulated house, and a heat exchange ventilation fan and air conditioner are installed in the back of the hut. The air that reaches the air is taken into a heat exchange ventilator, and heat is exchanged with the outside air taken in from outside. As a result, ventilation is performed while exchanging heat between the air flow introduced from the outside and the exhaust flow discharged from the indoor. In the ventilation system of Patent Document 1, the air supply destination from outside that has passed through the heat exchange ventilator and the air conditioner is switched between the duct that leads to the floor and the duct that leads to each room by the air path switching damper. It is possible. Therefore, the air supply airflow can be supplied to each room or under the floor by switching the ventilation path as necessary.
JP 2005-147565 A

  A ventilation system equipped with a heat exchanger can reduce the heating load by warming the outside air taken from outside in winter and supplying it indoors. Since it is warmed to a high temperature, if the air circulated indoors in the cabin space is sucked and heat exchanged with the outside air, the cooling load will be increased. Therefore, it has been proposed that heat exchange is performed only in winter, and fresh air introduced from the outside is supplied to each room as it is in summer. As described above, as a method of switching the ventilation path and the air blowing direction according to the season, a damper is attached to the branching portion of the duct as in the air path switching damper of Patent Document 1, and the ventilation path is closed by closing the ducts other than the air blowing destination. There are a method of switching, and a method of switching the ventilation path by switching the direction of rotation of the blower fan to the reverse direction to reverse the direction of the blower.

  However, the method of providing a branch duct or a bypass duct and switching the ventilation path with a damper has a problem that the configuration of the duct becomes complicated and the installation space becomes large. Further, in the method of switching the rotation direction of the blower fan to the reverse rotation, it is necessary to provide a control circuit for electrically controlling the rotation direction, and there is a problem that the blowing efficiency is lowered during the reverse rotation.

  In addition, as an example of highly heat-insulated and air-tight houses, there are those that adopt heat insulation methods such as so-called external heat insulation and external heat insulation in which the structural housing is covered with sheets and heat insulation materials. When applied, spaces such as the walls, under the floor, and the back of the shed are arranged inside the heat insulation line to form an airtight space, and members such as wood constituting the structural enclosure are also installed in the airtight space. For this reason, there is a problem that ventilation in the airtight space cannot be performed properly, and the structural casing is in a suffocated state, resulting in a decrease in durability.

In view of this point, an object of the present invention is to propose a heat exchange ventilation method for a building using a heat exchange ventilation system including a ventilation path switching device capable of switching a ventilation path with a simple configuration.

Another object of the present invention, by providing a ventilation path switching apparatus as described above, with a simple configuration, and the heat exchange ventilation method of the building to perform more heat exchange ventilation system maintenance is easy building Is to propose.

Another object of the present invention is to allow air to flow into an airtight space inside a heat insulation line such as a wall, under the floor, or behind a hut, so that members such as wood constituting the structural frame can breathe. the is to propose a heat exchange ventilation method durability by improving buildings that can be possible to extend the life of the building structural framework.

In order to solve the above problems, a heat exchange ventilation method for a building according to the present invention includes:
An outdoor air inlet and an outdoor air outlet provided in the building;
First air blowing means for introducing fresh air into the building from the outdoor air supply port;
A heat exchanger connected to the outdoor air supply port and the outdoor exhaust port, and performing heat exchange between fresh air introduced from the outdoor air supply port and contaminated air discharged from the outdoor exhaust port;
A ventilation path switching device connected to the outdoor air supply port and the outdoor exhaust port via the heat exchanger;
A first flow path for sending the fresh air that has passed through the heat exchanger to the ventilation path switching device; and a second flow path for sending the contaminated air that has passed through the ventilation path switching device to the heat exchanger;
An underfloor air supply / exhaust port provided under the floor of the building and a backside air supply / exhaust port provided in the back of the shed of the building;
A third flow path for communicating the underfloor air supply / exhaust port with the ventilation path switching device, and a fourth flow path for communicating the cabin back air supply / exhaust port with the ventilation path switching device;
A heat exchange ventilation method for a building, which is performed by a heat exchange ventilation system having a second air blowing means for sending out the contaminated air sucked from the underfloor air supply / exhaust port or the backside air supply / exhaust port from the outdoor exhaust port to the outside of the building. There,

The ventilation path switching device in this heat exchange ventilation system is:
A cylindrical casing;
A central partition that partitions the interior of the casing into two sections, a section communicating with the first flow path and the second flow path, and a section communicating with the third flow path and the fourth flow path;
A section communicating with the first flow path and the second flow path is divided into a first section communicating with the first flow path and a second section communicating with the second flow path, and is connected to the central partition wall. A first partition wall,
A section communicating with the third flow path and the fourth flow path is divided into a third section communicating with the third flow path and a fourth section communicating with the fourth flow path, and connected to the central partition wall. A second partition wall,
The connection line with the first partition in the central partition intersects with the connection line with the second partition,
The central partition is
Four openings formed in each region divided into four by the two intersecting connection lines;
Of the four openings, the first closed position that closes the opening formed in the region partitioning the first partition and the third partition and the opening formed in the region partitioning the second partition and the fourth partition And an opening formed in an area that partitions the first section and the fourth section, and a second closed position that closes an opening formed in the area that partitions the second section and the third section And a movable slide plate.

In addition, the heat exchanger in the heat exchange ventilation system includes a heat exchange operation mode in which the fresh air and the contaminated air are allowed to pass through the interior while performing heat exchange, and a non-heat that allows the interior to pass through without performing heat exchange. It is possible to switch to two operation modes of the exchange operation mode.

And this invention, in performing heat exchange ventilation of a building using such a heat exchange ventilation system,
In winter,
While operating the heat exchanger in the heat exchange operation mode and moving the slide plate to the first closed position, fresh air after heat exchange passes through the first compartment and the fourth compartment. Release into the building from the back and exhaust outlet of the hut,
In summer,
By operating the heat exchanger in the non-heat exchange operation mode and moving the slide plate to the second closed position, fresh air that has not been heat-exchanged passes through the first section and the third section. And it discharges in the building from the underfloor air supply / exhaust port.

As described above, the heat exchange ventilation system used in the heat exchange ventilation method for buildings of the present invention has two flow paths through which airflow flows by moving the slide plate between the first closed position and the second closed position. By using a ventilation path switching device with a simple configuration capable of switching the connection, fresh air that has passed through the heat exchanger can be supplied indoors from either the underfloor air supply / exhaust port or the back of the cabin air supply / exhaust port. Moreover, the contaminated air circulated indoors from the other side can be sucked through the heat exchanger, and discharged from the outdoor exhaust port after the heat exchange. At this time, the heat exchanger can be switched to two operation modes: a heat exchange operation mode and a non-heat exchange operation mode in which the inside passes without performing heat exchange.

In this way, fresh air after heat exchange is supplied to each room from the ceiling side (head side) via the air supply / exhaust vents in the cabin in winter, and fresh air is exchanged under the floor without heat exchange in summer. It can supply to each chamber from the side (foot side). Therefore, since the feet are not cooled by fresh air in winter, the head feels comfortable and the feet feel warm. Further, in summer, fresh outdoor air can be supplied from the foot side, and an increase in cooling load due to heat exchange can be prevented.

In the present invention, the heat exchange ventilation system includes an underfloor slit pipe installed under the floor of the building, and the third flow path of the ventilation path switching device is connected to the underfloor slit pipe, The underfloor air supply / exhaust port is preferably a slit-shaped opening formed in the tube wall of the underfloor slit pipe.

If it does in this way, fresh air can be reliably supplied to the position which should be ventilated by laying down the floor slit pipe in the position which should be ventilated in the underfloor space. In addition, fresh air can be evenly supplied to each position in the underfloor space.

Further, in the present invention, the heat exchange ventilation system includes an airtight space surrounded by a heat insulating layer and an airtight layer disposed on the outdoor side of the structural housing, wherein the structural housing of the building is disposed, It is desirable that the fresh air supplied from the air supply / exhaust port of the hut or the air supply / exhaust port under the floor is circulated in the building through an airtight space.

In this case, since air circulates around the structural frame, members such as wood constituting the structural frame can breathe, and the durability of the structural frame can be improved and the life of the building can be extended. it can. In addition, in the case of a wooden building, it is possible to adsorb carbon dioxide contained in the air circulating in the building with a wooden frame or to adjust the humidity of the circulating air by the moisture absorption and desorption force of wood. Because it can, you can improve the internal environment of the building.

According to the present invention, a ventilation path with a simple configuration capable of switching the connection between two flow paths through which airflow flows by moving the slide plate between the first closed position and the second closed position. A heat exchange ventilation method for a building by a heat exchange ventilation system using a switching device can be provided.

Further, according to the present invention, fresh air that has passed through the heat exchanger can be supplied indoors from one of the underfloor air supply / exhaust port or the backside air supply / exhaust port, and contaminated air that has circulated indoors is sucked from the other side. It can be exhausted from the outdoor exhaust after heat exchange through the heat exchanger. In this way, fresh air after heat exchange is supplied to each room from the ceiling side (head side) via the air supply / exhaust vents in the cabin in winter, and fresh air is exchanged under the floor without heat exchange in summer. It can supply to each chamber from the side (foot side). Therefore, since the feet are not cooled by fresh air in winter, the head feels comfortable and the feet feel warm. Further, in summer, fresh outdoor air can be supplied from the foot side , and an increase in cooling load due to heat exchange can be prevented .

DESCRIPTION OF EMBODIMENTS Embodiments of a ventilation path switching device and a building heat exchange ventilation system used in a building heat exchange ventilation method to which the present invention is applied will be described below with reference to the drawings.

(Configuration of ventilation path switching device)
FIG. 1 is a perspective view of a ventilation path switching device used in a heat exchange ventilation method for a building to which the present invention is applied. The ventilation path switching device 1 includes a rectangular tubular casing 2 with both ends closed, and a vertical center that is provided in the center of the casing 2 in the longitudinal direction and partitions the internal space of the casing 2 into two compartments 2a and 2b. A partition wall 3, a vertical partition wall 4 (first partition wall) and a horizontal partition wall 5 (second partition wall) that divide each partition partitioned by the central partition wall 3 into two. By these partition walls, inside the casing 2, a first partition C 1 and a second partition C 2 partitioned left and right by a vertical partition 4, and a third partition C 3 and a fourth partition partitioned vertically by a horizontal partition wall 5. Four spaces of the section C4 are formed. Each part of the ventilation path switching device 1 is formed using a well-known duct material such as a galvanized iron plate or a steel plate, but the material may be appropriately selected according to the use environment.

  One end of each of the vertical partition walls 4 and the horizontal partition walls 5 is connected to the side surfaces 6 and 7 that close both ends of the casing 2 in the longitudinal direction, and the other ends are connected to the front and back surfaces of the central partition wall 3. The central partition 3 is divided into four regions E1 to E4 by connection lines L1 and L2 with the vertical partition 4 and the horizontal partition 5 intersecting in a cross shape. The area E1 in the central partition 3 partitions the first section C1 and the third section C3, and the area E2 partitions the second section C2 and the third section C3. The region E3 partitions the first partition C1 and the fourth partition C4, and the region E4 partitions the second partition C2 and the fourth partition C4. In addition, the vertical partition 4 may be inclined and the horizontal partition 5 may also be inclined. In short, the horizontal partition 5 and the vertical partition 4 may intersect to form four sections.

  One opening is formed in each of the four regions E1 to E4. The first section C1 and the third section C3 are connected by the opening H1 formed in the area E1, and the second section C2 and the third section C3 are connected by the opening H2 formed in the area E2. The first section C1 and the fourth section C4 are connected by the opening H3 formed in the area E3, and the second section C2 and the fourth section C4 are connected by the opening H4 formed in the area E4.

  A side surface 6 on one end side of the casing 2 is divided into two regions 6a and 6b arranged side by side with a connection line with the vertical partition wall 4. The regions 6a and 6b include a duct D1 (first flow path) and a region 6a, respectively. D2 (second flow path) is connected. The side surface 7 on the other end side is divided into a region 7a and a region 7b lined up and down by a connection line with the horizontal partition wall 5, and the regions 7a and 7b each have a duct D3 (third flow path). And D4 (fourth flow path) are connected. Accordingly, one duct D1 to D4 is connected to each space of the first section C1 to the fourth section C4 provided in the casing 2.

  Inside the casing 2, two slide plates B <b> 1 and B <b> 2 that are slidable along the surface direction of the central partition 3 are mounted side by side. The slide plate B1 is guided by guide rails 8a and 8b formed along the left and right ends of the area E1 and the area E3 in the central partition wall 3, and closes the opening H1 in the area E1 and the opening H3 in the area E3. Move to and from the position. Similarly, the slide plate B2 is guided by guide rails 9a and 9b formed along the left and right ends of the region E2 and the region E4 in the central partition wall 3, and the position where the opening H2 of the region E2 is closed, It moves between positions where the opening H4 is closed.

  Actuating levers 10 and 11 are attached to the upper ends of the slide plates B 1 and B 2, respectively. The upper end portions of the operating levers 10 and 11 pass through through holes provided in the upper surface of the casing 2 and are outside the casing 2. It protrudes. The operating levers 10 and 11 are configured to slide in the through hole while maintaining an airtight state. Further, the operating levers 10 and 11 can be positioned at two positions of the slide plate B1 by a fixing member (not shown) provided at the upper portion of the casing 2, a position where the opening H1 is closed and a position where the opening H3 is closed. The slide plate B2 can be positioned at two positions: a position where the opening H2 is closed and a position where the opening H4 is closed. The operating levers 10 and 11 may be moved by driving means such as a motor, or may be moved manually.

  With the configuration as described above, the ventilation path switching device 1 can appropriately switch the connection of the ducts D1 to D4 by appropriately moving the positions of the slide plates B1 and B2 and positioning them to one of the two positions. Specifically, the slide plates B1 and B2 are positioned at positions where the two openings at the diagonal positions are closed. For example, the opening H1 is closed by the slide plate B1, the opening H4 is closed by the slide plate B2 (first closed position), the opening H3 is closed by the slide plate B1, and the opening H2 is closed by the slide plate B2. Each of the slide plates B1 and B2 is positioned at either one of the positions (second closed position) for closing.

  FIGS. 2A and 2B are explanatory views schematically showing the connection state of the ducts at the first closed position and the second closed position. As shown in FIG. 2 (a), in the first closed position, the two openings H2 and H3 at the diagonal positions are not closed, so the second section C2 and the third section are opened by the opening H2. C3 communicates, and the first section C1 and the fourth section C4 communicate with each other through the opening H3. Thereby, in the first closed position, the duct D2 and the duct D3 are connected via the second section C2 and the third section C3, and the duct D1 and the duct D4 are connected via the first section C1 and the fourth section C4. Can be connected. On the other hand, as shown in FIG. 2 (b), in the second closed position, the other two openings H1 and H4 in the diagonal position are not closed, so the first section C1 is opened by the opening H1. And the third section C3 communicate with each other, and the second section C2 and the fourth section C4 communicate with each other through the opening H4. Thereby, in the second closed position, the duct D1 and the duct D3 are connected via the first section C1 and the third section C3, and the duct D2 and the duct D4 are connected via the second section C2 and the fourth section C4. Can be connected.

  With such a simple configuration, the ventilation path switching device 1 has two systems of ducts through which airflow flows by a simple operation of moving the slide plates B1 and B2 between the first closed position and the second closed position. The connection can be switched.

  By using one slide plate instead of the two slide plates B1 and B2 and moving the slide plate up and down, the openings H1 and H4 or the openings H2 and H3 can be closed simultaneously. Also good. Such a configuration is possible by appropriately adjusting the arrangement of the openings H1 to H4. In addition, the connection position between the ducts D1 to D4 and the casing 2 is not limited to the side surfaces 6 and 7, and the duct is connected to each section from the other side surface of the casing 2 or the upper surface or the lower surface of the casing 2. There may be.

(Heat exchange ventilation system)
Next, the heat exchange ventilation system of the building provided with the ventilation path switching device 1 having the above configuration will be described. FIG. 3 is a cross-sectional view of a building equipped with a heat exchange ventilation system. The heat exchange ventilation system S includes a ventilation path switching device 1 and a heat exchanger 12 arranged in the attic space R1 of the building A, and an outdoor air supply port provided at a predetermined position (for example, an outer wall surface) of the building A. A1 and outdoor exhaust port A2, hut back air supply / exhaust port A3 (first indoor air supply / exhaust port / second indoor air supply / exhaust port) arranged in the ridge portion in the attic space R1, and arranged below the floor of the building An underfloor air supply / exhaust port A4 (second indoor air supply / exhaust port / first indoor air supply / exhaust port), a flow path such as a duct connecting them, and a blowing means such as a blower fan are provided.

  In the heat exchange ventilation system S, fresh outside air introduced from the outdoor air supply port A1 is passed through the heat exchanger 12 and the ventilation path switching device 1 to either the cabin backside air supply / exhaust port A3 or the underfloor air supply / exhaust port A4. From the other side, the contaminated air circulated indoors is sucked, sent to the heat exchanger 12 via the ventilation path switching device 1, and discharged from the outdoor exhaust port A2.

  The ceiling of the second floor room R2 of the building A is formed with a ventilation opening A5 that communicates with the attic space R1, and between the first floor and the second floor through the wall in the vicinity of the floor of the second floor room R2. A ventilation opening A6 communicating with the ceiling back space R3 is formed. A ventilation opening A7 that communicates with the ceiling space R3 is formed in the ceiling of the first floor room R4, and a ventilation opening that communicates with the underfloor space R5 through the wall in the vicinity of the floor of the first floor room R4. A8 is formed. The first floor room R4 communicates with the underfloor air supply / exhaust port A4 via the vent hole A8 and the underfloor space R5. With such a configuration, fresh air is sent to one of the cabin backside air supply / exhaust port A3 and the underfloor air supply / exhaust port A4, or polluted air is sent from either the backside air supply / exhaust port A3 or the underfloor air supply / exhaust port A4. Can be circulated from the upper floor to the lower floor or from the lower floor to the upper floor via the ventilation openings A5 to A8.

  The heat exchange ventilation system S includes ducts D1 to D4 communicating with the first section C1 to the fourth section C4 of the ventilation path switching device 1, and these ducts are described below. It is connected like this. First, one end of the duct D1 is connected to the outdoor air supply port A1 through the heat exchanger 12, and the other end is communicated with the first section C1 of the ventilation path switching device 1. Next, one end of the duct D2 is connected to the outdoor exhaust port A2 via the inside of the heat exchanger 12, and the other end is connected to the second section C2 of the ventilation path switching device 1. Further, one end of the duct D3 is connected to a wall flow path D5 passing through the wall space R6 of the building A, and the other end is connected to the third section C3 of the ventilation path switching device 1. One end of the duct D4 is connected to a building duct D8 in which a slit-like hut back side air supply / exhaust port A3 is formed, and the other end is connected to the fourth section C4 of the ventilation path switching device 1.

  In the wall space R6 of the building A, structural housings such as pillars and bearing walls (not shown) are arranged. The building A of this embodiment is a wooden building of a so-called external heat insulation method in which a heat insulating material layer is installed on the outdoor side of the structural frame and the outside of the heat insulating material layer is covered with an airtight layer, and is disposed in the wall space R6. The air is circulated around the wooden frame. Similarly, the roof portion of the building A is configured to cover a purlin and rafters that support the roof surface with a heat insulating material layer and an airtight layer. The underfloor space R5 is not provided with an underfloor ventilation port communicating with the outside, and air flows into or out of the underfloor space R5 via the underfloor air supply / exhaust port A4 and the ventilating port A5 or the wall space R6. It is like that.

  FIG. 4 is an explanatory diagram of the underfloor vent pipe D6 and the underfloor slit pipe D7 connected to the lower end of the wall channel D5. The underfloor slit pipe D7 is laid in parallel at a constant interval in the underfloor space R5, and one end of each underfloor slit pipe D7 is connected to the underfloor vent pipe D6, and a cap is attached to the other end. A slit-like underfloor air supply / exhaust port A4 is formed in the tube wall of each underfloor slit pipe D7. With this underfloor air supply / exhaust port A4, air can be evenly blown or sucked into each position of the underfloor space R5.

  The heat exchanger 12 sucks fresh outdoor air from the outdoor air supply port A1 into the duct D1, and sends it to the ventilation path switching device 1 side through the first air blowing fan 13 (first air blowing means) and the duct D2. The second ventilation fan 14 (second blowing means) for sucking indoor polluted air from the ventilation path switching device 1 and discharging it from the outdoor exhaust port A2 is provided. Moreover, the heat exchanger 12 is provided with a bypass flow passage for sending fresh air introduced from the outdoor air supply port A1 to the ventilation path switching device 1 side without exchanging heat therein. It is configured to be switchable between two operation modes: a heat exchange operation mode in which air supply and exhaust are performed and a non-heat exchange operation mode in which air supply and exhaust are performed without performing heat exchange.

  When the slide plates B1 and B2 of the ventilation path switching device 1 are set to the second closed position, the air supply path (flow path on the duct D1 side) connected to the outside via the heat exchanger 12 is connected to the duct D3, Fresh air is sent from the duct D3 to the wall channel D5. At this time, as shown in FIG. 4A, the fresh air flows into the underfloor slit pipe D7 via the underfloor vent pipe D6 and flows out from the underfloor air supply / exhaust port A4 to the underfloor space R5. And it is supplied to the 1st floor room R4 via the vent A8. On the other hand, when the exhaust plate (the channel on the duct D2 side) is connected to the duct D3 with the slit plates B1 and B2 in the first closed position, air is sucked into the duct D3 side via the wall channel D5. Therefore, as shown in FIG. 4B, the contaminated air flows out from the vent hole A8 into the underfloor space R5, and this contaminated air is sucked into the underfloor slit pipe D7 from the underfloor air supply / exhaust port A4.

  The heat exchange ventilation system S has an air supply path (flow path on the side of the duct D1) and an exhaust path (flow path on the side of the duct D2) connected to the outside via the heat exchanger 12 by the configuration as described above. Switching between the two channels, the channel for supplying and exhausting air under the floor in the building (the channel on the duct D3 side), and the channel for supplying and exhausting air to the back of the hut (the channel on the duct D4 side) be able to.

  In addition, the heat exchange ventilation system S circulates air in a space that is blocked from the outside by being surrounded by a heat insulating layer and an airtight layer such as a cabin space R1, a ceiling space R3, an underfloor space R5, or a wall space R6. Since air can be circulated through the entire building through these spaces, it can be as if the entire building is breathing like a shrine or temple or an old private house. . As a result, air can be circulated around the wood that constitutes the structural frame disposed inside the heat insulating material layer, and corrosion due to moisture can be prevented to improve the durability of the structural frame. it can. Therefore, it is possible to extend the life of the building. In addition, because the wood placed throughout the building can adsorb carbon dioxide contained in the air circulating in the building, and the humidity of the circulating air can be adjusted by the moisture absorbing and releasing power of the wood, The internal environment of the building can be improved.

  Furthermore, the heat exchange ventilation system S is easy to maintain because it only needs to clean the filters provided at the ventilation port and the air supply / exhaust port for daily maintenance. Also, when switching the ventilation route depending on the season, it is only necessary to move up to the attic space R1 where the temperature difference from the room is small and move the slide plates B1 and B2, so that it can be easily raised to the attic. If you keep it, you can maintain it yourself.

(Building heat exchange ventilation method)
Ventilation of the building A by the heat exchange ventilation system S having the above configuration is performed as follows.

  In winter, the heat exchanger 12 is switched to the heat exchange operation mode, and the slide plates B1 and B2 of the ventilation path switching device 1 are positioned at the first closed position to operate the heat exchange ventilation system S. In this state, the duct D3 is connected to the duct D2 connected to the outdoor exhaust port A2, and the duct D4 is connected to the duct D1 connected to the outdoor air supply port A1, so that fresh air introduced from the outside is Through the duct D4 and the building duct D8, the air is discharged from the air supply / exhaust port A3 into the cabin space R1, and flows from the upper floor to the lower floor through the ventilation openings A5 to A8. On the other hand, the polluted air circulating in the building is sucked and collected by the underfloor air supply / exhaust port A4 of the underfloor slit pipe D7 laid under the first floor by the suction force from the duct D3 side, and the underfloor vent pipe D6 and the intra-wall flow path D5. And it is sent to the heat exchanger 12 through the ventilation path switching device 1 via the duct D3.

  If it does in this way, the fresh air supplied to each room | chamber interior in a building will be heat-exchanged with the contaminated air attracted | sucked from the inside of the building in the heat exchanger 12, Then, it will pass through the duct D4 and will be attic space. Before being discharged to R1, heat is further collected when passing through the ridge duct D8 arranged in the ridge portion in the shed space R1, and is warmed to a temperature slightly lower than room temperature. The warmed fresh air is supplied to each room from the ceiling side via the attic space R1. Accordingly, since fresh air having a temperature slightly lower than room temperature flows from the head side of the indoor resident, the head feels comfortable and the feet feel warm.

  On the other hand, in the summer, the heat exchanger 12 is switched to the non-heat exchange operation mode, and the slide plates B1 and B2 of the ventilation path switching device 1 are positioned at the second closed position to operate the heat exchange ventilation system S. . In this state, the duct D4 is connected to the duct D2 connected to the outdoor exhaust port A2, and the duct D1 and the duct D3 connected to the outdoor air supply port A1 are connected. The underfloor space from the underfloor air supply / exhaust ports A4 of the many underfloor slit pipes D7 that are sent to the underfloor vent pipe D6 laid under the first floor via the duct D3 and the wall flow path D5. Released to R5. On the other hand, the polluted air circulated in the building goes up from the lower floor to the upper floor via the ventilation openings A5 to A8 by the suction force from the duct D4 side, and rises to the cabin space R1. Then, the air is sucked and collected in the cabin back side air supply / exhaust port A3 and sent to the heat exchanger 12 through the ridge duct D8, the duct D4 and the ventilation path switching device 1.

  In this way, fresh air supplied to each room in the building passes through the heat exchanger 12, but heat exchange is not performed, and it is sent to the floor at a temperature close to the outside air temperature. To flow into the room. Therefore, a comfortable coolness can be felt at the feet. Moreover, it does not increase the cooling load by being warmed when passing through the back of a cabin.

  In addition, when the inside of the building is cooled in summer and the temperature of the polluted air discharged from the building is lower than the outside air temperature, the heat exchanger may be switched to the heat exchange operation mode for operation. If it does in this way, since the temperature of fresh air can be lowered | hung when passing a heat exchanger, cooler air can be supplied to a foot side and a cooling load can be reduced.

  In the above configuration, the duct D3 may be connected to the ridge duct D8, and the duct D4 may be connected to the wall channel D5. In this case, the air can be circulated in the same manner as described above by setting the slide plates B1 and B2 to the second closed position in the winter and the first closed position in the summer.

It is a perspective view of the ventilation path switching device used for the heat exchange ventilation method of the building to which the present invention is applied. It is explanatory drawing of the connection state of each duct in a 1st closed position and a 2nd closed position. It is sectional drawing of the building provided with the heat exchange ventilation system used for the heat exchange ventilation method of the building to which this invention is applied. It is explanatory drawing of an underfloor ventilation pipe and an underfloor slit pipe.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ventilation path switching device 2 Casing 2a, 2b Space 3 Central partition 4 Vertical partition (1st partition)
5 Horizontal bulkhead (second bulkhead)
6, 7 Side surfaces 6a, 6b, 7a, 7b Regions 8a, 8b, 9a, 9b Guide rails 10, 11 Actuating lever 12 Heat exchanger 13 Blower fan (first blower means)
14 Blower (second blower)
A Building A1 Outdoor air supply port A2 Outdoor air exhaust port A3 Hut back air supply / exhaust port (first indoor air supply / exhaust port / second indoor air supply / exhaust port)
A4 Underfloor air supply / exhaust port (second indoor air supply / exhaust port / first indoor air supply / exhaust port)
A5 to A8 Ventilation openings B1 and B2 Slide plate C1 First section C2 Second section C3 Third section C4 Fourth section D1 Duct (first flow path)
D2 Duct (second flow path)
D3 Duct (third flow path)
D4 Duct (fourth flow path)
D5 In-wall flow path D6 Underfloor vent pipe D7 Underfloor slit pipe D8 Building duct E1-E4 Area H1-H4 Opening L1, L2 Connection line R1 Hut space R2 Second floor room R3 Ceiling back space R4 First floor room R5 Underfloor space R6 Wall Body space S Heat exchange ventilation system

Claims (3)

An outdoor air inlet and an outdoor air outlet provided in the building;
First air blowing means for introducing fresh air into the building from the outdoor air supply port;
A heat exchanger connected to the outdoor air supply port and the outdoor exhaust port, and performing heat exchange between fresh air introduced from the outdoor air supply port and contaminated air discharged from the outdoor exhaust port;
A ventilation path switching device connected to the outdoor air supply port and the outdoor exhaust port via the heat exchanger;
A first flow path for sending the fresh air that has passed through the heat exchanger to the ventilation path switching device; and a second flow path for sending the contaminated air that has passed through the ventilation path switching device to the heat exchanger;
An underfloor air supply / exhaust port provided under the floor of the building and a backside air supply / exhaust port provided in the back of the shed of the building;
A third flow path for communicating the underfloor air supply / exhaust port with the ventilation path switching device, and a fourth flow path for communicating the cabin back air supply / exhaust port with the ventilation path switching device;
A heat exchange ventilation method for a building, which is performed by a heat exchange ventilation system having a second air blowing means for sending out the contaminated air sucked from the underfloor air supply / exhaust port or the backside air supply / exhaust port from the outdoor exhaust port to the outside of the building. There,
The ventilation path switching device is
A cylindrical casing;
The inside of the casing, the compartment communicating with the first flow path and the second flow path, a central bulkhead which divides into two compartments communicating with said third flow path and the fourth flow passage,
A section communicating with the first flow path and the second flow path is divided into a first section communicating with the first flow path and a second section communicating with the second flow path, and is connected to the central partition wall. A first partition wall,
A section communicating with the third flow path and the fourth flow path is divided into a third section communicating with the third flow path and a fourth section communicating with the fourth flow path, and connected to the central partition wall. A second partition wall ,
The connection line with the first partition in the central partition intersects with the connection line with the second partition,
The central partition is
Four openings formed in each region divided into four by the two intersecting connection lines;
Of the four openings, the first closed position that closes the opening formed in the region partitioning the first partition and the third partition and the opening formed in the region partitioning the second partition and the fourth partition And an opening formed in an area that partitions the first section and the fourth section, and a second closed position that closes an opening formed in the area that partitions the second section and the third section A movable slide plate ,
The heat exchanger has two operation modes: a heat exchange operation mode in which the fresh air and the contaminated air are passed through the interior while performing heat exchange, and a non-heat exchange operation mode in which the interior is passed without performing the heat exchange. Can be switched to
In winter,
While operating the heat exchanger in the heat exchange operation mode and moving the slide plate to the first closed position, fresh air after heat exchange passes through the first compartment and the fourth compartment. Release into the building from the back and exhaust outlet of the hut,
In summer,
By operating the heat exchanger in the non-heat exchange operation mode and moving the slide plate to the second closed position, fresh air that has not been heat-exchanged passes through the first section and the third section. And the heat exchange ventilation method of the building characterized by discharging | emitting in the building from the said underfloor air supply / exhaust port. In the heat exchange ventilation method of the building of Claim 1,
The heat exchange ventilation system comprises:
Comprising an underfloor slit pipe laid under the floor of the building,
The lower floor slit pipe is connected to the third flow path of the ventilation path switching device,
The heat exchange ventilation method for a building, wherein the underfloor air supply / exhaust port is a slit-shaped opening formed in a pipe wall of the underfloor slit pipe . In the heat exchange ventilation method of the building of Claim 1 or 2,
The heat exchange ventilation system comprises:
The structure housing of the building is disposed, and includes an airtight space surrounded by a heat insulating layer and an airtight layer disposed on the outdoor side of the structure housing,
A heat exchange ventilation method for a building, characterized in that the fresh air supplied from the air supply / exhaust port of the hut or the air supply / exhaust port under the floor is circulated in the building through the airtight space .

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