JP2005069590A - Ventilation system of high air-tight and high heat insulating residence - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To inexpensively provide a ventilation system for supplying a required amount of fresh air to each room regardless of seasons, weather, night or day, and a position of a room. <P>SOLUTION: Atmospheric air is supplied to an approximately center of a high air-tight and high heat insulating house by a air supplying fan 41, and the air in each room is exhausted to an air tank 61 through a duct with an inside diameter calculated from a required ventilation volume. The air in the air tank is exhausted to the outside through an air tank exhausting device 66 constituted by an always releasing duct and a duct opened or closed by the temperature of atmospheric air. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to a ventilation system for ventilating a highly airtight and highly insulated house.

In a conventional ventilation system that uses a forced air supply system, has an outlet near the center of the house, and takes outside air into the room with an air supply fan. The ventilation system (louver) has a register for the amount of air discharged from each room. There is one that restricts and adjusts the ventilation amount of each room according to the size of the room, the purpose of use, and the like (for example, see Patent Document 1).

The following describes conventional ventilation system by FIG. A duct 221 having a duct fan 220 supplies outside air to a corridor located in the approximate center of the indoor space defined below the attic space 211 of the building, and the supplied outside air is supplied to the louvers 218 of each door. The air flows into the respective rooms through the undercuts 219, whereby the air in each room is restricted by the louver 225 provided on the inner wall 203 to an amount smaller than the supply amount of the external air from the duct fan 220, while the outer wall 202. In the summer season, it is discharged into the ventilation layer 205 heated by the outer wall 202, and in the winter season, it is carried into the attic space 211 by the updraft caused by its own warmth. . And the air which arrived in the attic space 211 from the indoor is discharged | emitted outdoors through the exhaust port 226 provided in the wife wall. The louver as a ventilation device has a register that can arbitrarily adjust the amount of ventilation, and the amount of air discharged from the indoor space to the ventilation layer is adjusted by the duct fan 220 even if all the louvers are adjusted by appropriately adjusting the register. The amount of air flow is limited to be less than the outside air supply amount. As a result, an appropriate amount of ventilation can be supplied to each room.

Japanese Patent Application No. 2000-138561 (Japanese Patent Laid-Open No. 2001-317779) (FIG. 1)

The conventional method of restricting the amount of air exhausted from each room with a ventilator (louver) having a register and adjusting the ventilation volume of each room according to the size of the room, the purpose of use, etc. is that the ventilation volume of each room is the ventilation layer Because the temperature varies greatly depending on the temperature difference in the room and the strength of the airflow in the ventilation layer, the ventilation volume set by the register varies greatly depending on the season, weather, day and night, etc. For example, in winter, on sunny days, and on the south side where the sun is shining, the temperature of the ventilation layer is considerably higher than the temperature of the outside air, the rising airflow due to that temperature is strong, and the displacement is large. However, the temperature rise of the ventilation layer is small and the displacement is not large at night when it is not exposed to sunlight or on rainy days. Therefore, when the register is set and the season and weather are different, the ventilation rate is greatly different from the set value.

Further, Patent Document 1 describes that the method is applied to a two-story or higher-level building, but it is difficult to apply this method to a two-story house. For example, if the winter room is heated and the air pressure inside the room is higher than the outside due to air supply, the air pressure difference between the ventilation layer and the room is large on the 2nd floor and small on the 1st floor, so the exhaust volume on the 2nd floor increases and the exhaust on the 1st floor The amount is reduced. On the other hand, if the summer room is cooled and the air pressure inside the room is higher than the outside due to air supply, the second floor is small and the first floor is large because the air pressure difference between the ventilation layer and the room is large, and the first floor exhaust is reduced. The amount increases.

The present invention eliminates the problems of the conventional example, provides a low-cost ventilation system that supplies a necessary amount of outside air to each room regardless of the season, weather, day and night, and the position of the room. The purpose is to reduce heat loss.

According to the first aspect of the present invention, the exhaust device includes an air tank, a room exhaust duct piped from each room to the air tank, and an air tank exhaust device that exhausts air from the air tank to the outside of the house. ing. Since the air flow in the air tank is small, the air pressure in the air tank is almost uniform, and the air speed in each room and between the rooms is small, so the air pressure in all the rooms is almost uniform, and it is highly airtight. Since the temperature of the air tank and the room exhaust duct inside the high heat insulation layer is substantially the same, the air pressure applied to both ends of each room exhaust duct is substantially the same. If the duct is not circular, it can be equivalently converted to a circle, so all ducts are circular. The air volume of the circular duct depends on the pressure, length, inner diameter, and inner wall roughness applied to both ends, and the duct length depends on the layout of the house. Can be adjusted. Therefore, by appropriately selecting the inner diameter of the room exhaust duct, the necessary ventilation amount can be supplied to each room regardless of the season, weather, day and night, and the room position.

The air pressure is generated by the air density, and the air density is smaller as the air temperature is higher. Therefore, the pressure difference between the inside of the highly airtight and highly insulated house and the outside on the same horizontal line is caused by the temperature difference between the room and the outside air. In summer, the air pressure in the air-conditioned room is relatively higher than the outside on the same horizontal line as it is closer to the foundation concrete, and the air pressure in the room at the position of the air tank exhaust device installed at the top of the house and connected to the outside is Since the pressure loss is higher than the outside, the indoor air pressure is higher than the external air pressure everywhere when the air tank exhaust device is exhausting. On the other hand, in winter, the closer to the foundation concrete, the lower the pressure from the outside, so the pressure loss of the air tank exhaust device is increased, and the pressure near the foundation concrete is made higher than the outside pressure. Since the pressure loss of the air tank exhaust device can be increased by increasing the frictional resistance of air, the air pressure in the air tank exhaust device can be adjusted to increase the atmospheric pressure from the outside.

The air tank exhaust device is composed of a first exhaust duct and a second exhaust duct that penetrate a high airtight high fault, and a damper that is arranged at one end or in the middle of the second exhaust duct and is opened and closed by an outside air temperature. Yes. The amount of air leaking from the airtight heat insulating layer increases as the atmospheric pressure increases. Leakage is unevenly distributed throughout the airtight insulation layer and cannot be included in the required ventilation volume of each room, so it is possible to reduce wasteful ventilation by keeping the indoor air pressure as low as possible and reduce heat loss due to ventilation. . The second exhaust duct uses a duct having a large inner diameter and a small air frictional resistance, and the first exhaust duct uses a duct having a small inner diameter and a large air frictional resistance. In summer, open the second exhaust duct to keep the indoor pressure as low as possible, and in winter, close the second exhaust duct to increase the indoor pressure, and raise the pressure near the foundation concrete higher than the external pressure. To do. By opening and closing the second exhaust duct, the indoor air pressure can be kept higher than the outside and the indoor air pressure can be kept low.

According to the present invention described in claim 2, each duct is composed of the duct and the joint of the two different inner diameters. The length of the room exhaust duct is determined by the structure and layout of the house, and the amount of ventilation is determined by the size and use of each room, so the inner diameter of the room exhaust duct varies. A duct having the same loss factor as the inner diameter and length of the required duct is connected by a joint between a duct having an inner diameter smaller than the required inner diameter and a duct having an inner diameter larger than the required inner diameter. Can be created. As a result, a duct having the required inner diameter and length can be produced at low cost by using two types of inner diameter ducts and joints that are sold.

According to the third aspect of the present invention, in a house in which a forced exhaust system that exhausts locally for a short period of time is arranged, the supply amount of the supply fan is set to the forced exhaust system when the forced exhaust system is driven. Increased by almost the same amount as the exhaust system. When the air is forcibly exhausted in a bath or a kitchen, the air pressure in the room can be kept higher than the external air pressure by increasing the air supply amount by that amount.

According to the fourth aspect of the present invention, the air supply amount of the air supply fan is controlled by the output of the air amount sensor installed in the air supply duct and the set air amount. The amount of air supplied by the air supply fan is controlled by the voltage supplied to the air supply fan. However, when the air frictional resistance increases due to clogging of the air filter or the like, the air supply amount decreases. The air flow sensor is installed in the air supply duct, and the voltage supplied to the air supply fan is adjusted by the output of the air flow sensor and the set value of the air flow, so that the set air supply amount is adjusted to the value of the air filter. It can be supplied accurately regardless of clogging. Further, when the forced exhaust system is driven, the supply amount of the supply fan can be increased by the exhaust amount by increasing the set value of the air volume by the exhaust amount of the forced exhaust system. When the number of residents changes, the air supply amount can be adjusted to match the number of residents. As a result, the air supply amount can be kept at an appropriate amount, wasteful heat loss due to the excessive air supply amount can be reduced, and the heating and cooling costs can be reduced.

As described above, the ventilation system of the highly airtight and highly insulated house of the present invention has a simple structure, so that the amount of fresh outdoor air required for each room can be transferred regardless of the season, weather, day and night, and the position of the room. The supply system is provided at a low cost, and the air pressure is reduced by keeping the air pressure in the room low, accurately controlling the amount of air supply, and reducing wasteful heat loss due to wasteful ventilation .

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing an embodiment of the ventilation system of the present invention. The interior of the room is a highly airtight and highly heat-insulated space surrounded by a foundation concrete 11 and an airtight heat insulating layer 13 provided inside the outer wall 12 of the wife wall parallel to the roof 15, the outer wall 12, and the paper surface. Since the foundation concrete 11 is highly airtight and the temperature in the room D and the room E is higher than the temperature of the foundation concrete 11, the air near the foundation concrete 11 in the underfloor space F also functions as a heat insulating layer. The room is composed of an attic space A, a room B, a room C, a room D, a room E, an underfloor space F, and an inner wall space G. A gap 52, a gap 53, and a gap 51 are provided between the room E having the air outlet 42, the room B, the room C, and the room D in order to reduce pressure loss due to the air flow. Further, the floor 16 on the first floor, the inner wall 14, the wall 20, the wall 21, the wall 22, and the ceiling 19 on the second floor are low in confidentiality and heat insulation, so that the room temperature is almost uniform, and the pressure loss due to the air flow in the room. There are few.

Outside air is taken in from the air supply port 43 outside the house by the air supply fan 41 through the air supply duct 31 to the vicinity of the center of the room through the air outlet 42. When the atmospheric pressure in the room is higher than the outside, the air taken into the outlet 42 flows toward the outside where the atmospheric pressure is relatively low. For example, the air in the vicinity of the outlet 42 flows into the underfloor space F through the floor 16 on the first floor and is discharged through the exhaust duct 36. Air near the outlet 42 flows into the attic space A through the ceiling 19 on the second floor, and is discharged to the outside due to leakage of the airtight heat insulating layer 13. Air near the outlet 42 flows into the room D through the gap 51, partly flows into the inner wall space G through the inner wall 14, and is discharged to the outside due to leakage of the airtight heat insulating layer 13, and most of the air is discharged from the outlet 62 to the exhaust duct 32. The air flows to the air tank 61 through the air tank and is discharged to the outside of the house through the air tank exhaust device 66. The air tank exhaust device 66 arranged perpendicular to the paper surface passes through the airtight heat insulating layer 13 on the end wall parallel to the paper surface, and discharges the air in the air tank 61 to the outside of the house.

Therefore, when the atmospheric pressure in the room is higher than the outside, the air flow is directed to the outside from the outlet 42 near the center of the room.

FIG. 2 is a diagram for calculating the inner diameter of the exhaust duct in each room. When the room temperature is uniform, the amount of air flowing through the duct is irrelevant to the arrangement and vertical position of the duct, so FIG. 2 shows the duct in a plan view. The airtight heat insulating layer 13 has a leak, and the leak is equivalently represented by a virtual exhaust duct 37. The solid line represents the hermetic layer and the broken line represents the non-hermetic layer. In order to simplify the explanation, the pressure loss due to the air flow between the indoor spaces and the air flow in the air tank 61 is ignored. The pressure loss due to the duct is the sum of the friction loss that occurs due to the friction between the inner wall of the straight duct tube and the air flow velocity, and the local loss that occurs because the flow velocity suddenly changes due to the joint, vent cap, or the like. The local loss is determined by the shape of the joint, vent cap, etc., and can be equivalently expressed by the length of the duct. The air volume of the duct is calculated from the effective length, inner diameter, roughness of the inner wall, and pressure loss. Here, the effective length is the sum of the length of the straight portion of the duct and the length of the equivalent duct of the local loss. In FIG. 2, the duct is represented by a straight line having an effective length.

When the air volume Qt is taken into the room by the air supply fan 41, the air pressure in the room becomes P higher than the air pressure outside the house, and the air pressure in the air tank 61 becomes P2 higher than the air pressure outside, the room exhaust duct 32 and The same air pressure (P-P2) is applied to both ends of the room exhaust duct 33, the room exhaust duct 34, and the room exhaust duct 35. Since the length of each room exhaust duct is determined by the layout of the house, the ratio of the ventilation amount of each room can be adjusted by the inner diameter of each room exhaust duct. The inner diameter of each room exhaust duct is determined as follows. First, the leakage air volume Qv is calculated from the equivalent gap area (C value) of the house, the floor area of the house, and the atmospheric pressure difference P between the room and the outside, and the total air volume subtracts the leakage air volume Qv from the supply air volume Qt. The air volume Qf, the air volume Qb, the air volume Qc, the air volume Qd, and the air volume Qe are set so as to be equal to the air volume. The air volume Qa of the air tank exhaust device 66 is equal to the sum of the air volume Qb, the air volume Qc, the air volume Qd, and the air volume Qe. Next, the inner diameter is calculated from the pressure loss, the air volume, the effective length, and the roughness of the inner wall of each room exhaust duct.

FIG. 3 is a graph showing the relationship between the vertical position in the room and the atmospheric pressure. (1) of FIG. 3 shows the room enclosed by the airtight heat insulation layer 13 and the foundation concrete 11, and the virtual duct 81 and the virtual duct 82 are virtual ducts for explanation, and have the same inner diameter, length, and rough inner wall. Have The virtual duct 81 is disposed at the uppermost portion in the room, and the virtual duct 82 is disposed at the lowermost portion in the room. When the air supply duct 89 that can be opened and closed is closed at the time of heating, the air density decreases as the temperature increases. Therefore, the pressure P in the room is relatively closer to the foundation concrete 11 than the outside at the same horizontal position. It becomes lower and is represented by the pressure characteristic 71. Since the air pressure in the lower part of the room is lower than the outside, the outside air enters through the virtual duct 82, and the air in the room is discharged through the virtual duct 81 because the air pressure in the upper part of the room is higher than the outside. The reason why the air pressure near the floor 18 on the second floor is the same as that of the outside is that the virtual ducts 81 and 82 have the same inner diameter, length, and roughness of the inner wall. It is assumed that the room temperature is always kept constant and uniform by the air conditioner 96. The air pressure inside the room can be made higher than the outside air pressure as shown by the pressure characteristic 72 by opening the air supply duct 89 and driving the air supply fan 90 to supply air into the room. When the house height is 6 m, the indoor temperature is 20 degrees, and the outside air temperature is 10 degrees below zero, P3 is 9.0 pascals.

On the other hand, when the air supply duct 89 is closed at the time of cooling, the atmospheric pressure P in the room becomes relatively higher than the outside at the same horizontal position as being closer to the foundation concrete 11, and is represented by the pressure characteristic 73. Since the atmospheric pressure in the upper part of the room is lower than the outside, outside air enters through the virtual duct 81, and the indoor air is discharged through the virtual duct 82 because the atmospheric pressure in the lower part of the room is higher than the outside. The air pressure P in the room can be made higher than the external air pressure as shown by the pressure characteristic 74 by opening the air supply duct 89 and driving the air supply fan 90 to supply air into the room. When the indoor temperature is 25 degrees and the outside air temperature is 35 degrees (P5-P4), it is 2.5 Pascals. Although switching between heating and cooling is required, it is preferable to reduce the frequency of the switching by giving hysteresis characteristics to the switching. Therefore, P4 is preferably set to about 2.0 Pascals.

When the atmospheric pressure in the room falls below the outside atmospheric pressure, the outside air enters the room due to leakage of the highly airtight high fault 13 .

On the other hand, when the atmospheric pressure in the room is increased, the amount of air leaking from the airtight heat insulating layer 13 is increased. Leakage is unevenly distributed over the entire airtight heat insulating layer 13 and is not included in the necessary ventilation amount of each room, and is therefore useless ventilation. Therefore, it is preferable to keep the atmospheric pressure in the room higher than the outside and as low as possible.

FIG. 4 shows an embodiment of the air tank exhaust device 66. The air tank exhaust device 66 includes an exhaust duct 83, an exhaust port 84, an exhaust duct 85, a damper 86, a damper controller 87, and a temperature sensor 88 that detects the temperature of the outside air. The damper 86 is opened when the outside air temperature becomes higher than the set value 1 by the damper controller 87 and the temperature sensor 88, and is closed when the outside air temperature becomes lower than the set value 2. In order to reduce the frequency of opening and closing the damper 86, it is preferable to provide a hysteresis characteristic and set the set value 1 to be several degrees higher than the set value 2. When the damper 86 is open, the air in the air tank 61 is exhausted through the exhaust duct 83 and the exhaust duct 85. When the damper 86 is closed, all the air in the air tank 61 is discharged through the exhaust duct 83, and the exhaust amount of the exhaust duct 83 increases, so that the pressure loss of the exhaust duct 83 also increases. Accordingly, the atmospheric pressure P in the room is the sum of the pressure loss of the air tank exhaust device 66 and the pressure loss of the room exhaust duct 32, and can be adjusted by opening and closing the damper 86. The inner diameters and lengths of the exhaust duct 83 and the exhaust duct 85 are set so that the indoor pressure becomes the pressure characteristic 72 when it is the coldest and the indoor pressure becomes the pressure characteristic 74 when it is the hottest.

For example, when the outside air temperature is less than or equal to the set value 2 and the inner diameter and length of the exhaust duct 83 and the exhaust duct 85, the atmospheric pressure P at the top of the room becomes 9.0 Pascals higher than the outside on the same horizontal line, When the atmospheric pressure P2 is 8.0 pascals higher than the outside on the same horizon, and the outside air temperature is a set value 1 or more, the uppermost atmospheric pressure P is 2.0 pascals higher than the outside on the same horizon, The pressure P2 is set to be 1.0 Pascal higher than the outside on the same horizontal line. In this case, when the outside air temperature is 35 degrees and the room temperature is 25 degrees, the atmospheric pressure P at the top of the room is 2.0 Pascals higher than the outside on the same horizontal line, and the atmospheric pressure P at the bottom of the room is on the same horizontal line. 4.5 Pascals higher than the outside, and the indoor average atmospheric pressure is 3.3 Pascals higher than the outside.

On the other hand, when the air tank exhaust device 66 is different from the configuration of FIG. 4 and the exhaust duct 85 does not exist and only the exhaust duct 83 exists, P3 is used in order to keep the indoor air pressure higher than the outdoor air pressure when the outside air temperature is 10 degrees below zero. Is set to 9.0 Pascals, the indoor pressure when the outside air is 35 degrees and the room temperature is 25 degrees in summer is indicated by the pressure characteristic 75, and the average atmospheric pressure in the room is 10.2 Pascals higher than the outside.

Therefore, by providing the air duct exhaust device 66 with the exhaust duct 85 and the damper 86, when the outside air is 35 degrees, the indoor average atmospheric pressure can be reduced by 68%, and the amount of air leaking from the airtight heat insulating layer 13 can be reduced by 43%. In the embodiment shown in FIG. 4, when the damper 86 is closed and the outside air temperature is the set value 1, the indoor average atmospheric pressure is the highest, the set value 1 is 15 degrees, the outside air temperature is 15 degrees, and the room temperature is 20 degrees. Then, the indoor average atmospheric pressure becomes 8.4 Pascals higher than the outside. Therefore, the highest indoor average atmospheric pressure can be lowered by 18% by opening and closing the exhaust duct 85.

In the embodiment of FIG. 4, the friction resistance of the air tank exhaust device 66 changes in two stages depending on the outside air temperature. However, by changing the friction resistance of the air tank exhaust device 66 in three stages depending on the outside air temperature, further, The average indoor pressure can be lowered while keeping the pressure higher than the outside.

FIG. 5 shows two equal length ducts with the same pressure loss characteristics. For example, the inner diameter of the room exhaust duct 32 is calculated from the necessary ventilation amount of the room D, the effective length of the room exhaust duct 32, the pressure loss, and the roughness of the inner wall, but the inner diameters of the ducts sold are 75 mm, 100 mm, 150 mm, etc. And do not necessarily match. The duct 91 is a requested duct, and the synthetic duct 95 is a duct synthesized with commercially available ducts. The duct 92 is a commercially available duct having an inner diameter larger than that of the duct 91, the duct 93 is a commercially available duct having an inner diameter smaller than that of the duct 91, and the joint 94 is a component that connects the duct 92 and the duct 93. By appropriately selecting the length of the duct 93, the duct 95 can have the same pressure loss characteristics as the duct 91. Therefore, a duct having a required inner diameter can be created from a commercially available duct.

FIG. 6 shows an embodiment in which the amount of air supplied by the air supply fan 41 is interlocked with a forced exhaust system installed in a kitchen or a bathroom. The forced exhaust system includes a switch 115, a controller 111, an exhaust duct 112, an exhaust fan 113, and an exhaust damper 114. The controller 111 periodically reads the state of the switch 115. When the state of the switch 115 is turned on, the controller 111 opens the exhaust damper 114, drives the exhaust fan 113, and exhausts the air in the room D. When the exhaust fan 113 is driven, the voltage supplied to the supply fan 41 is increased to increase the supply amount of the supply fan 41 by the exhaust amount of the exhaust fan 113. Thus, when the exhaust fan 113 is driven, the indoor atmospheric pressure can be kept higher than the external atmospheric pressure.

When the output of the air volume sensor 116 arranged inside the air supply duct 31 is different from the set value of the supply air amount, the controller 111 always corrects the supply air amount to the set value by correcting the voltage supplied to the supply air fan 41. Match.

FIG. 8 shows an example of the static pressure-air volume characteristic and the total pressure loss characteristic of the air supply fan 41. The static pressure-air volume characteristic 76 indicates the static pressure-air volume characteristic of the air supply fan 41 supplied with the voltage V1, and the static pressure-air volume characteristic 77 indicates the static pressure-air volume characteristic of the air supply fan 41 supplied with the voltage V2. Show. The total pressure loss characteristic 78 and the total pressure loss characteristic 79 indicate the total pressure loss characteristic of the house, and the total pressure loss characteristic of the house includes the pressure loss characteristic of the supply air from the supply port 43 to the outlet 42 and the pressure of the exhaust of the house. Obtained from loss characteristics. When the voltage V1 is supplied to the air supply fan 41 and the total pressure loss characteristic of the house is the total pressure loss characteristic 78, the supply air amount Qt and the total pressure loss are calculated from the intersection of the static pressure-air volume characteristic 76 and the total pressure loss characteristic 78. P6 is obtained.

When the same voltage is always supplied to the air supply fan 41, the air filter 106 is clogged, and when the total pressure loss characteristic of the house becomes the total pressure loss characteristic 79, the air supply amount becomes Qs, and the air supply The amount decreases. On the other hand, when the air supply amount is controlled using the air volume sensor 116 disposed in the middle of the air supply duct 31, the air filter 106 is clogged, and the total pressure loss characteristic of the house becomes the total pressure loss characteristic 79. In this case, the air supply amount is maintained at the set value Qt, and the voltage supplied to the air supply fan 41 is V2. Further, when the frictional resistance of the air tank exhaust device 66 is changed, the total pressure loss characteristic of the house changes, but the supply amount can be kept at the set value Qt. Furthermore, when the forced exhaust system is driven or when the number of residents changes, the required air supply amount can be supplied accurately by changing the set value of the air supply amount.

As mentioned above, although demonstrated based on the example of illustration, this invention is not limited to the above-mentioned example, For example, the ventilation system of the high airtight highly insulated house of this invention is applicable also to a medium airtight intermediate insulated house.

FIG. 1 is a cross-sectional view showing an embodiment of a ventilation system for a highly airtight and highly insulated house of the present invention.
FIG. 2 is a diagram for calculating the inner diameter of the exhaust duct in each room.
3 is a graph showing the relationship between the vertical position in the room and the atmospheric pressure.
FIG. 4 is one embodiment of an air tank exhaust device.
FIG. 5 shows two ducts with the same pressure loss characteristics.
6 shows an embodiment in which the air supply fan is interlocked with the forced exhaust system.
FIG. 7 shows an example of static pressure-air volume characteristics and total pressure loss characteristics of the air supply fan.
8 is a cross-sectional view showing a conventional ventilation system

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Basic concrete 12 Outer wall 13 Airtight heat insulation layer 14 Inner wall 15 Roof 16 First floor 17 First floor ceiling 18 Second floor 19 Second floor ceiling 20, 21, 22 Wall 23 Vent 31 Air supply duct 32, 33, 34 35 Exhaust duct 36 Exhaust duct 37 Virtual exhaust duct 41 Air supply fan 42 Outlet port 43 Air supply port 51, 52, 53 Clearance 61 Air tank 62, 63, 64, 65 Exhaust port 66 Air tank exhaust device 71, 72, 73, 74, 75 Pressure characteristics 76, 77 Static pressure-air volume characteristics 78, 79 Total pressure loss characteristics 81, 82 Virtual ducts 83, 85 Exhaust duct 84 Exhaust port 86 Damper 87 Damper controller 88 Temperature sensor 89 Supply air duct 90 Supply air Fans 91, 92, 93 Duct 94 Joint 95 Synthetic duct 96 Air conditioning unit 111 Controller 112 Duct 1 3 Exhaust fan 114 Exhaust damper 115 Switch 116 Airflow sensor 202 Outer wall 203 Inner wall 204 Airtight heat insulating layer 205 Vent layer 211 Attic space 218 Louver 219 Undercut 220 Duct fan 221 Duct 225 Louver 226 Exhaust port A Attic space B, C, D, E Room F Underfloor space G Inner wall space P Air pressure P3, P4, P5, P6, P7 Air pressure Qa, Qb, Qc, Qd, Qf, Qs, Qt, Qv

Claims (6)

An air supply duct having an air supply port arranged outside the house as one end and an air outlet arranged near the center of the house as another end and an air supply fan arranged in the middle of the air supply duct In a highly airtight and highly insulated house ventilation system in which air in each room of the house is exhausted by an exhaust device, the exhaust device being an air tank and a room piped from each room to the air tank A ventilation system for a highly airtight and highly insulated house characterized by comprising an exhaust duct and an air tank exhaust device that passes through a high airtight high fault and exhausts air from the air tank to the outside of the house. The air tank exhaust device is composed of a first exhaust duct and a second exhaust duct that penetrate the high airtight high fault, and a damper that is disposed at one end or in the middle of the second exhaust duct and is opened and closed by an outside air temperature. The ventilation system of the high airtight highly insulated house according to claim 1 The room exhaust duct or the first exhaust duct or the second exhaust duct is a first duct, a second duct having an inner diameter different from that of the first duct, the first duct and the second duct. A ventilation system for a highly airtight and highly insulated house according to claim 2, wherein the ventilation system is composed of a joint for connecting the ducts. The ventilation system of a highly airtight and highly insulated house according to claim 1, wherein an air filter, a heating device, a cooling device, a humidifying device, a dehumidifying device, or a sterilizing device is disposed at one end or in the middle of the air supply duct. In a highly airtight and highly insulated house where a forced exhaust system that exhausts locally for a short period of time is arranged, when the forced exhaust system is driven, the supply amount of the supply fan is the same as the exhaust amount of the forced exhaust system. The ventilation system of a highly airtight and highly insulated house according to claim 1, wherein the ventilation system increases by substantially the same amount. The ventilation system of the high airtight and highly insulated house according to claim 1, wherein the air supply fan is controlled by an output of an air volume sensor installed in the air supply duct and a set air volume.

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