JP7228836B2 - Pressurized heat exchange ventilated building - Google Patents

Description

The present invention prevents contaminated outside air from entering the main body of the building, supplies the entering outside air as purified air to the inside of the building by means of a microporous adsorbent, and ventilates supply air and exhaust air according to changes in the outside air temperature. The present invention relates to a pressurized heat exchange ventilation type building that provides a comfortable living environment suitable for the four seasons while controlling the number of times and suppressing the power consumption required for heat exchange ventilation.

In Japan, which stretches from north to south, the temperature and humidity of the four seasons differ greatly depending on where you live, and there is also a wide range of temperature changes. For example, in midsummer, the maximum daytime temperature in Hokkaido is approximately equivalent to the minimum temperature in Honshu. As a technology to provide a comfortable living environment in response to such various climate differences, heat exchange is performed between the incoming outside air and the outgoing indoor air, and the heat exchange system ventilates the building while conserving energy. An air conditioning system has been proposed.

For example, the heat exchange air conditioning system shown in Patent Document 1 includes secondary heat exchangers (41A to 41D) is provided, and in cooperation with the main heat exchanger 12 and the sub heat exchangers (41A to 41D) of the unit 10, all room cooling, main cooling/dehumidification, cooling/light heating, all room heating, main heating/ventilation , All dehumidification, main dehumidification/cooling refrigerant circulation system RC is provided, and air conditioning ducts (31A to 31D) and ventilation ducts (35A to 35D) are equipped with opening and closing dampers (51A to 51D) that can increase and decrease the air flow rate. It was established.

Japanese Patent Application Laid-Open No. 2001-116321

However, the technique of Patent Document 1 requires a large number of ducts because the air-conditioning ducts and ventilation ducts are arranged between the ventilation/air-conditioning integrated unit 10 and each room, and the ducts are stretched around the space above the ceiling. state. For this reason, duct materials and piping work cost a lot of money, there are problems such as cleaning and maintenance costs to remove dust and mold that accumulate in the duct, and the resistance of the duct to the motor There is a problem that a load is applied to the drive system such as.

Furthermore, there is the problem that the air is polluted by pollutants that fly into Japan due to seasonal winds, and this polluted outside air enters the buildings and causes health hazards. It is common practice to open the windows of the building, and there is a problem that it is difficult to control the health hazards caused by the polluted outside air.

The present invention has been devised to solve the above-mentioned problems of the prior art. The inside of the building body where the radiant heat accumulates is maintained at a positive pressure from the outside to prevent the infiltration of contaminated outside air, and the supplied outside air is filtered through an outside air purification filter. and microporous adsorbents to ensure that the living environment is optimized, air supply louvers and air outlet slits allow air to circulate in the room to equalize room temperature and improve cooling and heating efficiency. By controlling heat exchange and ventilation according to the temperature difference, airtightness is maintained even in summer, preventing outside air from entering, protecting the living environment, and reducing power consumption for heating and cooling, making it healthy and comfortable. To provide a pressurized heat exchange ventilation type building which forms a living environment, has a ductless air supply system, maintains a positive pressure inside the building body by means of pipe line resistance of an exhaust system, and reduces management costs. With the goal.

(1) The means of the invention according to claim 1 configured to solve the above-mentioned problems is to form an outside air purification chamber in the space under the floor of an airtight building body, and the outside air purification chamber has a large number of micropores. An adsorbent is arranged, a heat exchange ventilation device is arranged in the building body with an air supply port opened to the outside air purification chamber, and an outside air suction pipe having an outside air purification filter and an exhaust port open to the outside. A pipe is connected to the heat exchange ventilation system, an outdoor exhaust pipe that opens to a room defined in the building body is connected to the heat exchange ventilation system, and an air supply gull that communicates the outside air cleaning room with the room is said to be said. It is provided on the floor of the room, and the outside air sucked by the heat exchange ventilator exchanges heat with the discharged indoor air and is discharged to the outside air purification chamber, and purified air is generated by the microporous adsorbent. Air is supplied from the air supply louver to the room, and the heat exchange ventilation device is set to the outside air supply amount>outdoor exhaust amount, and the inside of the building body is always maintained at a positive pressure higher than the outside pressure to prevent outside air from entering. It consists of something that is designed to suppress.
(2) In addition, the present invention according to claim 2 includes an airtight building body defining a room inside, an airtight outside air purification chamber formed in a space under the floor of the building body, and the outside air A heat exchanger having a large number of microporous adsorbents arranged in a purification room, a discharge pipe with an exhaust port opening to the outside, and arranged in the building body 1 with an air supply port opening to the outside air purification chamber. a ventilator, an outside air intake pipe having an outside air purification filter in the middle and connected to the heat exchange ventilator having an outside air intake opening to the outdoors, and an indoor intake opening to the room, wherein the heat exchange is performed. It is composed of an outdoor exhaust pipe connected to a ventilation device and an air supply gull provided on the floor that communicates the outside air purification chamber with the room, and the heat exchange ventilation device sucks in the outside air through the outside air intake pipe. The outside air and the indoor air discharged through the outdoor exhaust pipe are heat-exchanged and released into the outside air purification chamber, and the purified air is generated by contacting the microporous adsorbent in the outside air purification chamber, and the purified air is The air is supplied directly to the room without being subjected to pipeline resistance by the air supply louver, the heat exchange ventilator is set so that the outdoor air supply volume > the outdoor exhaust volume, and the outdoor exhaust volume is set by the pipeline resistance of the outdoor exhaust pipe. <By using the outside air supply amount, the inside of the main building is always maintained at a positive pressure higher than the outside air pressure.
(3) The heat exchange ventilator reduces the number of times air is supplied per unit time to the number of times air is discharged per unit time during severe winter when the outside air temperature is less than a predetermined temperature and the temperature difference between the outside air temperature and the room temperature is within a predetermined temperature range. Ventilation control is performed to increase the number of ventilations and the number of ventilations is less than in other seasons, and in spring and autumn when the outside air temperature is within a predetermined temperature range higher than the outside air temperature in the midwinter, the number of exhausts is reduced to the number of air supply. Ventilation control is performed so that the outside air temperature is 1/2, and in summer when the outside air temperature is higher than the outside air temperature in the spring and autumn, ventilation control is performed so that the air supply number is 10% less than the air supply number. In severe winter and winter when the outside temperature is lower than a predetermined temperature, and in summer when the outside air temperature is higher than the predetermined temperature, heat exchange is performed between the introduced outside air and the discharged indoor air to keep the indoor temperature at an appropriate temperature. , and in spring and autumn when the outside air temperature is within the predetermined temperature range, heat exchange is not performed and power consumption is reduced.
(4) It is preferable that the main body of the building has a concrete slab under the floor and a heat-insulating outer wall so that the radiant heat is retained throughout.
(5) In addition, it is preferable that the room is provided with a blow-out slit communicating with the outside air purification chamber in the floor part near the wall of the room at a position spaced apart from the air supply louver.
(6) Further, it is preferable that the blow-out slit is provided at a position that is maximally separated from an air supply port of the heat exchanging ventilator that opens to the outside air purification chamber.
(7) Further, the outside air temperature below the predetermined temperature is preferably below 14°C.
(8) Further, it is preferable that the outside air temperature is within the predetermined temperature range of 14 to 26.degree.
(9) The outside air temperature higher than the predetermined temperature range is above 26°C.

(1) Since the inside of the airtight building body is maintained at a positive pressure from the outside, it prevents the intrusion of polluted outside air mixed with harmful substances such as PM2.5 and pollen into the building. Even if the door is opened, it is difficult for polluted outside air to enter, and clean air can be maintained inside the building.
(2) Since the outside air sucked by the heat exchange ventilation system is purified by the outside air purification filter and the microporous adsorbent before being supplied to the main body of the building, a healthy and comfortable living space can be formed and maintained.
(3) By always maintaining a positive pressure higher than the outside air pressure inside the main building, purified air can be distributed to every corner of the room, ensuring a healthy living environment.
(4) By controlling the heat exchange ventilation system throughout the year according to the difference between the outside temperature and the indoor/outdoor temperature, the inside of the building is positively pressurized even in the summer, thereby protecting the living environment and preventing outside air from entering. In spring and autumn, it is possible to economically create an environment by reducing heating and cooling costs without heat exchange and suppressing power consumption.
(5) Since the air purified in the outside air purification room is supplied directly to the room from the air supply louver, it is possible to reduce duct installation and maintenance costs, and reduce the load on the ventilation system due to pipe resistance. can.
(6) Since the building body is configured so that radiant heat is retained throughout, the room temperature in the building body is stabilized without being affected by outside air temperature, and cooling and heating costs can be reduced.
(7) By arranging the blow-out slit communicating with the outside air purification room away from the supply air louver and causing convection of the purified air in the room, the room temperature can be made uniform and the cooling and heating efficiency can be improved.
(8) The blow-out slit is provided at the maximum distance from the indoor air supply port of the heat exchange ventilator so that the supplied outside air contacts the microporous adsorbent for a long distance and time in the outside air purification room, so that the outside air is removed. can be sufficiently purified.

1 is a longitudinal sectional view of a building according to an embodiment of the invention; FIG. FIG. 2 is a partially enlarged view of FIG. 1; FIG. 4 is an explanatory diagram of ventilation volume control performed according to a temperature difference;

Embodiments of the present invention will be described in detail below with reference to the drawings. In FIGS. 1 and 2, 1 indicates a two-story building body. 2 is a concrete slab that constitutes the building body 1, 3 is a foundation 3 integrally formed on the slab 2, a base 4 is provided on the foundation 3, and a wooden framework is built on the base 4. 5 has been constructed. 6 is a roof covering the frame 5 . The frame 5 is composed of an outer wall 5A made of a heat-insulating material and pillars (not shown). In the frame 5, the first floor section 7A and the first floor ceiling section 7B form the first floor partition section 7, the second floor section 8A and the second floor ceiling section 8B form the second floor section section 8, and each partition section 7, 8 has partition walls 9 and doors 10 defining a plurality of rooms 11, 11, . . .

The building body 1 constructed as described above is made airtight as a whole by covering the lower surface of the floor section 7A, the inner surface of the outer wall 5A, and the rear surface of the second floor ceiling section 8B with an airtight sheet (not shown). In addition, the space between the first floor floor 7A and the slab 2 is formed in an airtight outside air cleaning room 12, and the outside air cleaning room 12 is defined by the first floor ceiling 7B and the second floor floor 8A. The air supply path 14 communicates with the air inflow space 13 . The outside air cleaning room 12 communicates with the room 11 through an air supply louver 15 provided on the first floor 7A, and the air inflow space 13 communicates with the room 11 through an air supply louver 15 provided on the second floor 8A. .

Further, reference numeral 16 indicates a blow-out slit located near the wall of each room 11 and communicating with the outside air cleaning chamber 12 and opening to the floor portion 7A. The blow-out slit 16 is arranged as far away from the air supply grill 15 as possible so that the outside air flows in the inside of the outside air purification chamber 12 for a long distance and for a long time, and sufficiently contacts with the microporous adsorbent 23 described later. It is designed to purify. Therefore, the air supply grille 15 and the air outlet slit 16 should be positioned near the diagonal wall of the room 11, or they may be arranged near the partition wall 9 facing each other.
Here, the blow-out slit 16 has a gap shape of about 2 mm in width and opens to the floor portion 7A along the wall. are appropriately varied according to the area of the room 11 . Although the air outlet slit 16 is a narrow gap as described above, it is drawn large in the drawing of FIG.

Also, in the room 11 on the second floor, a similar blow-out slit 16 is arranged along the wall of the floor 8A apart from the air supply louver 15, so that purified air flows into the room 11 from the air inflow space 13. be.

Reference numeral 17 denotes a heat exchange ventilator installed in the outside air purification chamber 12 . As shown in FIG. 2, the heat exchanging ventilator 17 has a casing 17A and four air supply ports provided in the casing 17A: an outside air introduction port 17B, an outdoor air exhaust port 17C, an indoor air supply port 17D and an indoor air exhaust port 17E. It consists of an exhaust port, two motors (not shown) for air supply and exhaust provided in the casing 17A, and a heat exchange element 17F which is connected to the supply/exhaust ports 17B to 17E and built in the casing 17A. An outside air temperature sensor 17G is provided at the outside air introduction port 17B, and an indoor temperature sensor 17H is provided at the indoor exhaust port 17E. Then, the heat exchange ventilator 17 performs ON/OFF control to drive and stop the air supply and exhaust motors, respectively, according to fluctuations in the temperature of the outside air to be sucked in and the temperature of the indoor air and the temperature difference between them. Therefore, by performing heat exchange or performing normal ventilation without heat exchange, power consumption is suppressed and warm air or cold air is supplied to the room for air conditioning.

Reference numeral 18 denotes an outside air suction pipe connected to the outside air introduction port 17B of the heat exchanging ventilator 17. As shown in FIG. The outside air intake pipe 18 has an outside air intake port 18A opened to the outside from the outer wall 5A of the frame 5, and is positioned upstream of the heat exchanging ventilation device 17 and provided with an outside air purification filter 19, so that the outside air can be Impurities such as dust, pollen, exhaust gas, and PM2.5 are removed by adsorption to purify the outside air, and the load on the air supply motor of the heat exchange ventilation device 17 is reduced.
The outside air sucked through the outside air intake pipe 18 exchanges heat with the exhaust air from the building main body 1 in the heat exchanging ventilator 17 and is discharged to the outside air purification chamber 12 through the indoor air supply port 17D. Reference numeral 20 denotes a discharge pipe which is connected to the outdoor exhaust port 17C of the heat exchanging ventilator 17 and has an exhaust port 20A open to the outside.

Reference numeral 21 denotes an outdoor exhaust pipe for discharging the indoor air in the building body 1 to the outside. The outdoor exhaust pipe 21 consists of a horizontal main pipe 21A connected to the indoor exhaust port 17E of the heat exchange ventilator 17 and arranged in the outside air cleaning room 12, and a vertical main pipe extending from the tip of the horizontal main pipe 21A to the back of the second floor ceiling 8B. 21B, upper and lower horizontal branch pipes 21C and 21C arranged behind the ceiling portion 7B on the first floor and behind the ceiling portion 8B on the second floor and connected to the vertical main pipe 21B, and each room 11 connected to each horizontal branch pipe 21C. branch pipes 21D, 21D, . . .
A dust removal filter (not shown) is provided at the opening of each of the branch pipes 21D, 21D to prevent dust from accumulating in the outdoor exhaust pipe 21 and increasing the pipe resistance, and preventing the inside of the heat exchange ventilation device 17 from This prevents the situation where the load on the exhaust motor is increased due to the suction of the exhaust motor.

22 , 22 , . . . indicate a plurality of microporous adsorbents arranged in the outside air cleaning chamber 12 and the air inflow space 13 . Each of the microporous adsorbents 22 is made of a bag made of a breathable material such as woven fabric containing a microporous material such as charcoal or bamboo charcoal. For example, by adsorbing and removing formaldehyde, toluene, etc., clean air that is further purified is supplied to each room 11 and the like.
Since it is desirable that the microporous adsorbent 22 has a large contact area with the air, it is preferable to arrange the adsorbents 22 on a mounting table having ventilation holes formed on the lower surface thereof, for example, a screen-like table.

This embodiment is constructed as described above, and its operation will be described in detail below. First, the heat exchanging ventilator 17 purifies the outside air sucked through the outside air intake pipe 18 by the outside air purification filter 19, and then directly discharges it from the indoor air supply port 17D to the outside air purification chamber 12 without passing through the pipe line. The purified air is further purified by contacting the microporous adsorbent 22 in the outside air purification chamber 12 and supplied to each room 11 through the air supply louver 15 .
In this way, since the purified air supply system is configured as a ductless flow path that directly discharges from the indoor air supply port 17D of the heat exchange ventilator 17 to the outside air purification chamber 12, there is no pipe line resistance. Also, the load on the air supply motor can be reduced.

The purified air in the outside air purification room 12 is blown into the room 11 on the first floor through the air supply louver 15, and is also blown into the air inflow space 13 through the air supply passage 14, and is blown into the room 11 on the second floor through the air supply louver 15. By entering, each room 11 can be filled with purified air. A large number of microporous adsorbents 22 are arranged in the air inflow space 13 behind the ceiling part 7B on the first floor to further purify the air purified in the outside air purification chamber 12. - 特許庁

The blowout slit 16 is provided at a position as far away from the indoor air supply port 17D of the heat exchange ventilator 17 as possible, so that the outside air blown out from the indoor air supply port 17D flows in the outside air purification chamber 12 for a long distance and for a long time. Since the air is brought into contact with the microporous adsorbent 22 , the outside air can be sufficiently purified and discharged into the room 11 through the blowing slit 16 .
By blowing the purified air into the room 11 also from a blowing slit 16 provided apart from the air supply louver 15, the purified air convects in the room 11 for a long time, and the room temperature is quickly made uniform. It is possible to perform cooling and heating efficiently. Moreover, by blowing the purified air into the room 11 in a pressurized state, the purified air can be distributed to every corner of the room 11.例文帳に追加

On the other hand, the indoor air of each room 11 is sucked by the heat exchanging ventilator 17 through the outdoor exhaust pipe 21 with branch pipes 21D opening to the first floor ceiling 7B and the second floor ceiling 8B. After exchanging heat with the outside air, the air is discharged to the outside from the discharge pipe 20. - 特許庁While the air supply system is not subject to pressure loss due to pipeline resistance, the exhaust system is subject to pressure loss due to pipeline resistance in the outdoor exhaust pipe 21, so that the state of outside air supply volume>outdoor exhaust volume is maintained. That is, as a result of always maintaining a positive pressure state inside the building body 1, the intrusion of polluted air and substances into the building body 1 through gaps, ventilation openings, etc. is always prevented, and the building interior becomes a comfortable living environment. can be maintained.

Next, the control of the ventilation frequency of air supply and exhaust in the building main body 1 will be explained for each season in which there is a temperature difference in the outside air temperature.
In spring and autumn (intermediate season) when the outside air temperature is in the range of 14 to 26° C., the heat exchange function of the heat exchange ventilator 17 is stopped because the difference between the indoor temperature and the outside air temperature is small. Then, in spring and autumn, control is performed to reduce the amount of air exhausted to the outside with respect to the amount of air supplied to the indoors. That is, the air supply frequency is set to 0.50 times/h, while the exhaust frequency is set to 0.25 times/h, which is half (see FIG. 3). In addition to maintaining it at a low level, we will reduce power consumption and save energy.

On the other hand, during severe winter, when the outside temperature is less than 14°C and the outside temperature is much lower than the inside temperature, the temperature difference between the inside temperature and the outside temperature is 17°C ≤ Δθ < 29°C. , As shown in FIG. 3, the air supply frequency is set to 0.35 times/h and the exhaust frequency is set to 0.30 times/h to suppress the indoor/outdoor ventilation frequency and to perform control to approximate the ventilation volume. , heat exchange and ventilation are performed while suppressing discharge of warm air in the building main body 1, and power consumption required for heating costs is suppressed.

Also, if the outside temperature is less than 14°C and the temperature difference between indoors and outdoors is in the range of 8 ≤ Δθ < 17, the air supply frequency is set to 0.40/h and the exhaust frequency is set to 0.35/h. , When the temperature difference between indoors and outdoors is in the range of 2 ≤ Δθ < 8, the number of times of air supply is 0.45/h, the number of exhausts is 0.40/h, and the temperature difference between indoors and outdoors is 2 ≤ When the air supply frequency is 0.45/h and the exhaust frequency is 0.40/h when Δθ<8, and when the indoor/outdoor temperature difference is Δθ<2, The air supply frequency is 0.50/h and the exhaust frequency is 0.45/h. Control is performed to increase the number of air intake/exhaust ventilations per unit time as the temperature difference between indoors and outdoors becomes smaller. Thus, the efficiency of the power consumption of the heat exchange ventilator 17 is improved so as not to be wasted.

As described above, in severe winter and winter when the outside air temperature is less than a predetermined temperature of 14°C, and in summer when the outside air temperature is higher than a predetermined temperature of 26°C, the ratio between the outside air to be introduced and the indoor air to be discharged is By exchanging heat between them, the room temperature is maintained at an appropriate temperature, and control is performed to reduce power consumption. On the other hand, in spring and autumn when the outside air temperature is within a predetermined temperature range of 14 to 26°C, the inside of the building body 1 is pressurized to maintain a positive pressure, and the power consumption required for heating and cooling is reduced without heat exchange. control to save money.

Further, by directly supplying air from the indoor air supply port 17D of the heat exchange ventilation device 17 to the outside air purification chamber 12 without passing through a duct, the pipe line resistance is reduced to zero, while the indoor air is distributed inside the building main body 1. Since it is configured to receive pipeline resistance by discharging through the outdoor exhaust pipe 21 provided, the relationship of air supply amount>exhaust amount is always established, and heat exchange ventilation for maintaining positive pressure inside the building body 1 While the load on the device 17 is reduced, the interior of the building body 1 maintains a positive pressure higher than the outside air pressure.

Furthermore, by adopting a configuration in which the purified air is directly emitted from the heat exchange ventilation device 17 to the room 11 via the outside air purification chamber 12 without passing through a duct, the construction cost for laying the duct can be saved, and clogging of the duct can be prevented. No countermeasures against mold are required, and maintenance and management costs can be reduced.

In the present embodiment, a two-story detached building has been described as an example, but the present invention can be applied to a one-story one-story house and a high-rise multi-story building. In the case of this high-rise collective building, the underfloor space corresponds to the space between the ceiling space of the rooms on the lower floors and the space under the floors of the rooms on the upper floors.

1 building body 2 slab 5A outer wall 7A floor 11 room 12 outside air purification room 15 air supply louver 16 blowout slit 17 heat exchange ventilator 17D indoor air supply port 18 outside air intake pipe 18A outside air intake port 19 outside air purification filter 21 outdoor exhaust pipe 22 microporous adsorbent

Claims (8)

An outside air purification chamber is formed in the space under the floor of an airtight building body, a large number of microporous adsorbents are arranged in the outside air purification chamber, and the building body is opened with an air supply opening in the outside air purification chamber. A heat exchange ventilation device is arranged inside, an outside air intake pipe having an outside air purification filter and a discharge pipe with an exhaust port opening to the outside are connected to the heat exchange ventilation device, and an outdoor opening to the room defined in the building main body An exhaust pipe is connected to the heat exchanging ventilator, and an air supply louver is provided on the floor of the room for connecting the outside air purification chamber to the room, and the outside air sucked by the heat exchanging ventilator is discharged. After exchanging heat with the indoor air, it is discharged into the outside air purification chamber, purified air is generated by the microporous adsorbent, and is supplied to the room from the air supply louver, and the heat exchange ventilation device supplies the air to the room. By setting the outdoor exhaust amount, the inside of the building body is always maintained at a positive pressure higher than the outside air pressure to suppress the intrusion of outside air, During the severe winter, when the outside temperature and indoor temperature are within the specified temperature difference range, the number of times of air supply per unit time is made higher than the number of times of exhaust air, and the number of times of ventilation is controlled to be less than in other seasons. In spring and autumn when the outside temperature is within a predetermined temperature range higher than the outside air temperature in the severe winter, ventilation control is performed so that the number of times of exhausting air is half the number of times of air supply, and the outside air temperature is the outside air in the spring and autumn. In the summer when the temperature is higher than the temperature, ventilation control is performed so that the number of times of exhaust air is 10% less than the number of times of air supply. In the summer, when the temperature is higher, the indoor temperature is maintained at an appropriate temperature by exchanging heat between the introduced outside air and the discharged indoor air. A pressurized heat exchange ventilated building designed to reduce power consumption without heat exchange. An airtight building body defining a room inside, an airtight outside air purification chamber formed in the space under the floor of the building body, a large number of microporous adsorbents arranged in the outside air purification chamber, and exhaust. A heat exchange ventilator having a discharge pipe whose mouth opens to the outside, and which is arranged in the building main body with the air supply opening open to the outside air cleaning room, and an outside air intake opening to the outside. an outside air suction pipe having an outside air purification filter and connected to the heat exchange ventilation device; an outdoor exhaust pipe connected to the heat exchange ventilation device with the indoor suction port open to the room; The outside air purification chamber is composed of an air supply louver that communicates with the room, and the heat exchange ventilation device heat exchanges between the outside air sucked through the outside air intake pipe and the indoor air discharged through the outdoor exhaust pipe. is released into the outside air purification chamber, and is brought into contact with the microporous adsorbent in the outside air purification chamber to generate purified air, and the purified air flows into the room without being subjected to pipeline resistance by the air supply ratchet. By supplying directly, the heat exchange ventilation device is set to the outside air supply amount>outdoor exhaust amount, and by the pipeline resistance of the outdoor exhaust pipe, the outdoor exhaust amount<outside air supply amount. A positive pressure higher than the outside air pressure is always maintained, and the heat exchange ventilator further operates during severe winter when the outside air temperature is less than a predetermined temperature and the outside air temperature and the room temperature are within a predetermined temperature difference range. Ventilation control is performed so that the air supply frequency per unit time is greater than the exhaust frequency and the ventilation frequency is lower than in other seasons, and in spring and autumn when the outside air temperature is within a predetermined temperature range higher than the outside air temperature in the harsh winter. performs ventilation control in which the number of exhausts is half the number of times of air supply, and in summer when the outside air temperature is higher than the outside temperature in the spring and autumn, the number of exhausts is reduced by 10% compared to the number of times of air supply. Ventilation control is performed, and in the case of severe winter and winter when the outside air temperature is less than a predetermined temperature, and in the case of summer when the outside air temperature is higher than the predetermined temperature, between the outside air to be introduced and the indoor air to be discharged A pressurized heat that maintains the indoor temperature at an appropriate temperature by performing heat exchange, and reduces power consumption without heat exchange in spring and autumn when the outside air temperature is within the predetermined temperature range. Exchange-ventilated building. 3. The pressurized heat exchange ventilation system according to claim 1 or 2, wherein the main body of the building has a concrete slab under the floor and a heat-insulating outer wall so that radiant heat is retained throughout. building. 3. The pressurized heat exchange ventilation according to claim 1 or 2, wherein the room is provided with a blow-out slit communicating with the outside air purification chamber in the floor part near the wall of the room at a position spaced apart from the air supply louver. Ceremonial building. 5. The pressurized heat exchange ventilation type building according to claim 4, wherein said blow-out slit is provided at a position which is maximally separated from an air supply port of said heat exchange ventilator opening to said outside air purification chamber. 6. The pressurized heat exchange ventilation type building according to any one of claims 1 to 5, wherein the outside air temperature below the predetermined temperature is below 14°C. The pressurized heat exchange ventilation type building according to any one of claims 1 to 5, wherein the outside air temperature is 14 to 26°C within the predetermined temperature range. 6. The pressurized heat exchange ventilation type building according to any one of claims 1 to 5, wherein the temperature above the predetermined temperature range is above 26°C.

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