JP3525386B1 - Ventilation system for highly airtight and highly insulated houses - Google Patents

Abstract

A ventilation system for supplying fresh air in an amount required for each room regardless of the season, weather, day and night, and the position of the room is provided at a low cost. SOLUTION: Outside air is supplied to a substantially airtight and highly insulated house at a substantially center of a house by an air supply fan 41, and air in each room is passed through a duct having an inner diameter calculated from a required ventilation volume.
The air in the air tank is discharged to the outside through an air tank exhaust device 66 which is constituted by a duct which is always open and a duct which opens and closes depending on the temperature of the outside air.

Description

Detailed Description of the Invention 【Technical field】

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

[Background technology]

In a conventional ventilation system that uses a forced air supply system, has an outlet near the center of the house, and takes in outside air into the room by an air supply fan, a ventilation device having a register for the amount of air exhausted in each room ( There is a device (for example, see Patent Document 1) in which the ventilation amount of each room is controlled by the size of the room, the purpose of use, etc.

[0003] The following describes a conventional example ventilation system by FIG. Duct 2 with duct fan 220
21 supplies outside air to the corridor located in the approximate center of the indoor space defined below the attic space 211 of the building,
The supplied outside air flows into each room through the louvers 218 and the undercuts 219 of each door, whereby the air in each room is separated from the outside air in the duct fan 220 by the louvers 225 provided on the inner wall 203. It is discharged to the ventilation layer 205 between the outer wall 202 and the inner wall 203 while being limited to an amount less than the supply amount, and in the summer, it rises in the ventilation layer 205 heated by the outer wall 202, and in the winter, it rises up. It is carried into the attic space 211 by the rising airflow due to the warmth. The air that has reached the inside of the attic space 211 from the inside is exhausted to the outside through the exhaust port 226 provided in the end wall. The louver as a ventilation device has a register capable of arbitrarily adjusting the ventilation amount, 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 combined by appropriately adjusting the register. Limit the ventilation so that it is less than the outside air supply. This makes it possible to supply an appropriate amount of ventilation to each room.

[0004]

[Patent Document 1] Japanese Patent Application No. 2000-138561
01-317779) (Fig. 1)

DISCLOSURE OF THE INVENTION [Problems to be Solved by the Invention]

The conventional method of limiting the air exhaust volume of each room with a ventilation device (louver) having a register and adjusting the ventilation volume of each room according to the size of the room, purpose of use, etc. is the ventilation volume of each room. Changes greatly depending on the temperature difference between the ventilation layer and the room, and the strength of the airflow in the ventilation layer, so the ventilation volume set by the register varies greatly depending on the season, weather, day and night, etc. For example, winter
On a sunny day, the temperature of the aeration layer is considerably higher than the temperature of the outside air on the south side where the sunlight is shining, and the upward airflow due to that temperature is strong and the displacement is large. However, the temperature of the aeration layer does not rise so much and the exhaust volume does not increase on a day when it is not exposed to sunlight or on a rainy day. Therefore, when the season when the register is set and the weather are different, the ventilation volume is significantly different from the set value.

Further, although Patent Document 1 describes that the method is applied to a two-story building or one having more floors, it is difficult to apply this method to a two-story house. For example, if the interior of a room is heated in winter and the air pressure inside is higher than the outside due to air supply, the air pressure difference between the ventilation layer and the room is large on the second floor and small on the first floor, so the exhaust volume on the second floor is large and the exhaust gas on the first floor The quantity is reduced. On the other hand, when the air pressure inside the room is higher than the outside due to air supply in the summer, the pressure difference between the ventilation layer and the room is small on the second floor and large on the first floor, so the exhaust volume on the second floor is small and the exhaust air on the first floor is small. The amount increases.

The present invention solves the above-mentioned problems of the prior art, provides an inexpensive ventilation system for supplying the required 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 wasteful heat loss due to.

[Means for Solving the Problems]

According to the first aspect of the present invention, the exhaust device includes an air tank, a room exhaust duct provided from each room to the air tank, and an air tank exhaust device for exhausting air from the air tank to the outside of the house. It consists of Since the air flow in the air tank is small, the air pressure in the air tank is almost uniform,
Also, since the air velocity in each room and between rooms is low, the air pressure in all rooms is almost uniform, and the air temperature inside the airtight and highly insulating layer is almost the same as the air temperature in the room exhaust duct. The air pressures applied to both ends of each room exhaust duct are almost the same. If the ducts are not circular, they can be equivalently converted into circles, so all ducts should be circular. The air volume of the circular duct depends on the pressure and length on both ends, the inner diameter and the roughness of the inner wall, and the length of the duct depends on the layout of the house, so the ratio of the exhaust volume of each room depends on the inner diameter of the room exhaust duct. Can be adjusted. Therefore, by appropriately selecting the inner diameter of the room exhaust duct, it is possible to supply a necessary ventilation amount to each room regardless of the season, weather, day and night, and the position of the room.

Since the air pressure is caused by the air density, and the air density is smaller as the temperature is higher, the air pressure difference between the inside of a highly airtight and highly insulated house and the outside on the same horizon is caused by the temperature difference between the room and the outside air. . In summer, the air pressure inside the air-conditioned room is higher than the outside on the same horizon as it is closer to the basic concrete, and the air pressure inside the room at the position of the air tank exhaust device installed at the top of the house and communicating with the outside is Since the pressure loss is higher than that of the outside, the atmospheric pressure in the room is higher than the atmospheric pressure everywhere when the air tank exhaust device is exhausting.
On the other hand, in winter, the air pressure becomes relatively lower than the outside as it gets closer to the basic concrete, so the pressure loss of the air tank exhaust device is increased and the atmospheric pressure near the basic concrete is made higher than the external pressure. Since the pressure loss of the air tank exhaust device can be increased by increasing the frictional resistance of air, the air pressure inside the room can be made higher than the outside by adjusting the frictional resistance of air in the air tank exhaust device.

The air tank exhaust device comprises a first exhaust duct and a second exhaust duct which penetrate a high airtight and high fault, and a damper which is arranged at one end or in the middle of the second exhaust duct and which is opened and closed by the outside air temperature. It is configured. The higher the air pressure in the room, the greater the amount of air leaked from the airtight insulating layer. Leaks are unevenly distributed throughout the airtight insulation layer and cannot be included in the required ventilation of each room, so keeping the room air pressure as low as possible reduces unnecessary ventilation and reduces heat loss due to ventilation. . The second exhaust duct uses a duct having a large inner diameter and a small frictional resistance against air, and the first exhaust duct uses a duct having a small inner diameter and a large frictional resistance against air. In summer, keep the atmospheric pressure in the room as low as possible by opening the second exhaust duct, and in winter, raise the indoor air pressure by closing the second exhaust duct, making the atmospheric pressure near the foundation concrete higher than the external atmospheric pressure. To do. By opening and closing the second exhaust duct, the atmospheric pressure in the room can be kept higher than the outside and the atmospheric pressure in the room 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. Since the length of the room exhaust duct is determined by the structure and layout of the house, and the ventilation amount is determined by the size and use of each room, the inner diameter of the room exhaust duct varies. A duct with the same loss factor as the inner diameter and length of the required duct is connected with a duct with an inner diameter smaller than the required inner diameter and a duct with an inner diameter larger than the required inner diameter with a joint to form a duct with the required length. Can be created. This makes it possible to sell ducts with the required inner diameter and length. 2
It can be manufactured at low cost by using ducts and joints with different inner diameters.

According to the present invention as defined in claim 3 ,
In a house in which a forced exhaust system for locally exhausting air is arranged, the supply amount of the air supply fan increases by about the same amount as the exhaust amount of the forced exhaust system when the forced exhaust system is driven. When the gas is forcibly exhausted in a bath or kitchen, the air pressure in the room can be kept higher than the air pressure outside by increasing the air supply amount by the exhaust 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 flow sensor installed in the air supply duct and the set air flow rate. The amount of air supplied by the air supply fan is controlled by the voltage supplied to the air supply fan, but when the frictional resistance of air increases due to clogging of the air filter,
Air supply is reduced. By installing the air volume sensor in the air supply duct, by adjusting the voltage supplied to the air supply fan according to the output of the air volume sensor and the set value of the air volume,
The set air supply amount can be accurately supplied regardless of clogging of the air filter. Further, when the forced exhaust system is driven, the air supply amount of the air supply fan can be increased by the exhaust amount by increasing the set value of the air amount by the exhaust amount of the forced exhaust system. Also, when the number of residents changes, it is possible to adjust the amount of air supply according to the number of residents. As a result, the amount of air supply can be maintained at an appropriate amount, wasteful heat loss due to excessive amount of air supply can be reduced, and cooling and heating costs can be reduced.

【The invention's effect】

As described above, the ventilation system for a highly airtight and highly insulated house according to the present invention has a simple structure.
We provide an inexpensive system that supplies the required amount of fresh outside air to each room regardless of the season, weather, day and night, and the position of the room. Cooling and heating costs are reduced by reducing unnecessary heat loss due to ventilation .

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing one embodiment of the ventilation system of the present invention. The interior has a roof 15 and an outer wall 12
Is a space of high airtightness and high heat insulation surrounded by the airtight heat insulating layer 13 provided inside the outer wall 12 of the gable wall parallel to the paper surface and the basic concrete 11. The basic concrete 11 is highly airtight, and the temperatures of the rooms D and E are the same as the basic concrete 1
Since the temperature is higher than 1, the basic concrete in the underfloor space F 1
The air around 1 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. Outlet 4
A space 52, a space B, a room C, and a room D are provided with a space 52, a space 53, and a space 51 to reduce pressure loss due to air flow.
In addition, the floor 16, the inner wall 14, the wall 20, the wall 21, and the wall 2 on the first floor
Since the ceiling 19 on the second and second floors has low airtightness and heat insulation, the temperature inside the room is almost uniform, and the pressure loss due to the air flow in the room is small.

The outside air is blown out from the air supply port 43 located outside the house by the air supply fan 41 through the air supply duct 31 to the outlet 4
At 2, it is installed near the center of the room. When the atmospheric pressure inside 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 near the outlet 42 passes through the floor 16 on the first floor and the underfloor space F
And is discharged through the exhaust duct 36. The 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 the leak of the airtight heat insulating layer 13. Further, the air near the outlet 42 flows into the room D through the gap 51, a part of the air flows into the inner wall space G through the inner wall 14, and is discharged to the outside by the leakage of the airtight heat insulating layer 13. Most of the air is exhausted from the exhaust port 62 to the exhaust duct 32. Through the air tank 6
1 and is discharged to the outside of the house through the air tank exhaust device 66. Air tank exhaust device 66 arranged perpendicular to the paper surface
Penetrates 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 of each room. When the temperature in the room is uniform, the air volume 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. There is a leak in the airtight insulating layer 13, 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. For the sake of simplicity, the pressure loss due to the air flow between the spaces in the room and the air flow in the air tank 61 will be ignored. The pressure loss due to the duct is the sum of the friction loss caused by the friction between the inner wall of the pipe of the straight duct and the flow velocity of the air, and the local loss caused by the sudden change in the flow velocity due to the joint or the vent cap. 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 in the duct is calculated from the effective length of the duct, the inner diameter, the roughness of the inner wall, and the pressure loss. Here, the effective length is the sum of the length of the straight portion of the duct and the equivalent duct length of the local loss. In FIG. 2, the duct is represented by a straight line of effective length.

When the air volume Qt is taken into the room by the air supply fan 41, the air pressure inside the room becomes P higher than the air pressure outside the house, and the air pressure inside the air tank 61 becomes P2 higher than the air pressure outside, the room exhaust air is discharged. The same atmospheric pressure (P-P2) is applied to both ends of the duct 32, the room exhaust duct 33, the room exhaust duct 34, and the room exhaust duct 35. Since the length of the exhaust duct in each room is determined by the layout of the house, the ratio of ventilation volume in each room can be adjusted by the inner diameter of the exhaust duct in each room. The inner diameter of the exhaust duct for each room is determined as follows. First, the leakage air volume Q
v is calculated from the equivalent clearance 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 is the air volume Q of the supply air.
The air volume Qf, the air volume Qb, the air volume Qc, the air volume Qd, and the air volume Q are equal to the air volume obtained by subtracting the leakage air volume Qv from t.
Set e. The air volume Qa of the air tank exhaust device 66 is the air volume Q
It is equal to the sum of b, air volume Qc, air volume Qd, and air volume Qe. Next, the inner diameter is calculated from the pressure loss of each room exhaust duct, the air volume, the effective length, and the roughness of the inner wall.

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 surrounded by the airtight heat insulating 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 inner wall roughness. Virtual duct 8
1 is arranged in the uppermost part of the room, and the virtual duct 82 is arranged in the lowermost part of the room. When the openable air supply duct 89 is closed during heating, the air density becomes smaller as the temperature becomes higher. Therefore, the air pressure P inside the room becomes closer to the basic concrete 11 than the outside at the same horizontal position. It becomes low and is represented by the pressure characteristic 71. Since the air pressure in the lower part of the room is lower than that of the outside, the outside air enters through the virtual duct 82, and the air pressure in the upper part of the room is higher than the outside, and the air in the room is discharged through the virtual duct 81. The atmospheric pressure in the vicinity of the floor 18 on the second floor becomes the same atmospheric pressure as the outside because the virtual ducts 81 and 82 have the same inner diameter, length and inner wall roughness.
It is assumed that the room temperature is always kept constant and uniform by the cooling and heating device 96. The air pressure inside the room can be made higher than the atmospheric pressure outside 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 height of the house 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 during cooling, the atmospheric pressure P in the room becomes higher than the outside at the same horizontal position as it is closer to the basic concrete 11, and is represented by the pressure characteristic 73. . Since the air pressure in the upper part of the room is lower than that of the outside, the outside air enters through the virtual duct 81, and the air pressure in the lower part of the room is higher than the outside, and the air in the room is discharged through the virtual duct 82. The air pressure P in the room is determined by the air supply duct 89.
By opening the air supply fan and driving the air supply fan 90 to supply air into the room, the pressure can be made higher than the external atmospheric pressure as shown by the pressure characteristic 74. The room temperature is 25 degrees and the outside air temperature is 35 degrees.
At the time of degree (P5-P4), it is 2.5 Pascal. It is necessary to switch between heating and cooling, but it is preferable to reduce the frequency of switching by giving hysteresis characteristics to the switching. Therefore, P4 is preferably set to about 2.0 Pascal.

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

On the other hand, when the atmospheric pressure in the room is increased, the leaked air volume of the airtight heat insulating layer 13 becomes large. Leakage is non-uniformly distributed over the entire airtight insulating layer 13 and cannot be included in the required ventilation of each room, which is wasteful ventilation. Therefore, it is preferable to keep the atmospheric pressure in the room higher than the outside and keep it 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 and an exhaust port 84.
The exhaust duct 85, the damper 86, the damper controller 87, and the temperature sensor 88 for detecting the temperature of the outside air. The damper 86 is the damper controller 8
7 and the temperature sensor 88 open when the outside air temperature becomes higher than the set value 1, and close when the outside air temperature becomes lower than the set value 2. In order to reduce the frequency of opening / closing of the damper 86, it is preferable to provide a hysteresis characteristic so that the set value 1 is set higher than the set value 2 by several degrees. When the damper 86 is open, the air in the air tank 61 is discharged 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 exhausted 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. Therefore, 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.
It can be adjusted by opening and closing. The inner diameter and the length of the exhaust duct 83 and the exhaust duct 85 are set so that the pressure inside the room has a pressure characteristic 72 at the coldest time and the pressure inside the room has a pressure characteristic 74 at the hottest time.

For example, the exhaust duct 83 and the exhaust duct 85
When the outside air temperature is less than or equal to the set value 2, the innermost pressure P of the room becomes 9.0 Pascal higher than the outside on the same horizontal line, and the atmospheric pressure P2 of the air tank is higher than the outside on the same horizontal line. When the outside air temperature is higher than the set value 1 by 8.0 Pascal, the atmospheric pressure P at the top of the room becomes 2.0 Pascal higher than the outside on the same horizontal line, and the air pressure P2 in the air tank is higher than the outside on the same horizontal line. Set so that it is 1.0 Pascal higher. In this case, when the outside air temperature is 35 degrees and the room temperature is 25 degrees, the air pressure P at the top of the room is 2.0 Pascal higher than the outside on the same horizontal line, and the air pressure P at the bottom of the room is on the same horizontal line. It is 4.5 Pascal higher than the outside and the average atmospheric pressure in the room is 3.3 Pascal 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 but only the exhaust duct 83, the outside air temperature is 10 degrees below zero and the indoor air pressure is kept higher than the outside air pressure. Therefore, when P3 is set to 9.0 Pascal, the pressure in the room when the outside air is 35 degrees and the room temperature is 25 degrees is indicated by the pressure characteristic 75 in summer, and the average pressure in the room is 10.2 Pascals from the outside. Get higher

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

In the embodiment of FIG. 4, the friction resistance of the air tank exhaust device 66 changes in two steps depending on the outside air temperature, but by changing the friction resistance of the air tank exhaust apparatus 66 in three steps depending on the outside air temperature, , It is possible to lower the highest average air pressure in the room while keeping the air pressure in the room higher than the outside.

FIG. 5 shows two ducts of the same length with the same pressure drop 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 diameter of the sold duct is 75 mm, 100 mm, 150 mm, etc. And do not necessarily match. Duct 91 is the required duct and synthetic duct 95 is a synthetic duct of the ducts sold. The duct 92 is a commercially available duct having an inner diameter larger than that of the duct 91.
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 characteristic as the duct 91. Therefore, it is possible to make a duct having the required inner diameter with a duct that is sold.

FIG. 6 shows that the amount of air supplied by the air supply fan 41 is linked to the forced exhaust system installed in the kitchen or bathroom.
An example is shown. The forced exhaust system includes a switch 115, a controller 111, an exhaust duct 112, and an exhaust fan 11.
3 and an exhaust damper 114. The controller 111 periodically reads the state of the switch 115, and when the state of the switch 115 is turned on, the exhaust damper 1
14 is opened, the exhaust fan 113 is driven, and the air in the room D is discharged. When the exhaust fan 113 is driven, the voltage supplied to the air supply fan 41 is increased to increase the amount of air supplied by the air supply fan 41 by the amount of exhaust air of the exhaust fan 113. Thus, when the exhaust fan 113 is driven, the atmospheric pressure inside the room can be kept higher than the atmospheric pressure outside.

The controller 111 sets the air supply amount by correcting the voltage supplied to the air supply fan 41 when the output of the air flow sensor 116 arranged inside the air supply duct 31 is different from the set value of the air supply amount. Always match the value.

FIG. 8 shows an example of static pressure-air volume characteristics and total pressure loss characteristics of the air supply fan 41. The static pressure-air volume characteristic 76 shows 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 shows the static pressure-air volume characteristic of the air supply fan 41 supplied with the voltage V2. Show. Total pressure loss characteristics 7
8 and the total pressure loss characteristic 79 show the total pressure loss characteristic of the house,
The total pressure loss characteristic of the house is obtained from the pressure loss characteristic of the supply air from the air supply port 43 to the outlet 42 and the pressure loss characteristic of the exhaust gas of the house. 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 is calculated from the intersection of the static pressure-air volume characteristic 76 and the total pressure loss characteristic 78.
And total pressure loss P6 is obtained.

When the same voltage is constantly supplied to the air supply fan 41, the air filter 106 is clogged,
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 amount decreases. On the other hand, when the air supply amount is controlled by using the air flow sensor 116 arranged in the air supply duct 31, the air filter 1
When 06 is clogged and the total pressure loss characteristic of the house becomes the total pressure loss characteristic 79, the supply air amount is maintained at the set value Qt, and the voltage supplied to the supply fan 41 becomes 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 air supply amount can be maintained at the set value Qt. Furthermore, when the forced exhaust system is driven or when the number of residents changes, the required amount of air supply can be accurately supplied by changing the set value of the amount of air supply.

Although the present invention has been described above based on the illustrated example, the present invention is not limited to the above-mentioned example, and for example, the ventilation system for a highly airtight and highly insulated house of the present invention can be applied to a medium airtight and medium insulated house. Is.

[Brief description of drawings]

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

[Explanation of symbols]

11 foundation concrete 12 outer wall 13 airtight heat insulating layer 14 inner wall 15 roof 16 floor of the first floor 17 ceiling of the first floor 18 floor of the second floor 19 floor of the second floor 20, 21, 22 wall 23 blowout 31 air supply duct 32, 33, 34, 35 Room Exhaust Duct 36 Exhaust Duct 37 Virtual Exhaust Duct 41 Air Supply Fan 42 Outlet 43 Air Supply 51, 52, 53 Gap 61 Air Tank 62, 63, 64, 65 Exhaust 66 Air Tank Exhaust Device 71 , 72, 73, 74, 75 Pressure characteristic 76, 77 Static pressure-air flow rate characteristic 78, 79 Total pressure loss characteristic 81, 82 Virtual duct 83, 85 Exhaust duct 84 Exhaust port 86 Damper 87 Damper controller 88 Temperature sensor 89 Air supply duct 90 air supply fans 91, 92, 93 duct 94 joint 95 synthetic duct 96 air conditioner 111 controller 1 2 Duct 113 Exhaust fan 114 Exhaust damper 115 Switch 116 Air volume sensor 202 Outer wall 203 Inner wall 204 Airtight heat insulating layer 205 Ventilation 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 indoor air pressure P3, P4, P5, P6, P7 air pressure Qa, Qb, Qc, Qd, Qf, Qs, Qt, Qv

Claims (4)

(57) [Claims] 1. 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 the other end, and the air supply duct is arranged in the middle of the air supply duct. In a ventilation system of a highly airtight and highly insulated house in which outside air is taken into the room by an air supply fan and air in each room of the house is exhausted by an exhaust device, the exhaust device is an air tank and the air tank from each room and room exhaust duct plumbed to be configured from the air tank exhaust device for exhausting to the outside of the house from the air tank through the airtight high fault, the air tank exhaust
The first exhaust duct where the air system penetrates the high airtight high fault
And the second exhaust duct and one end of the second exhaust duct.
Or a damper that is placed midway and opens and closes depending on the outside temperature
Ventilation system for airtight and highly insulated houses characterized by being composed of 2. The room exhaust duct, 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;
Ventilation system airtight high insulation housing according to claim 1, wherein comprised joint for connecting the second duct with the first duct 3. In a highly airtight and highly insulated house in which a forced exhaust system for locally exhausting air for a short period of time is arranged, the amount of air supplied by the air supply fan is the forced exhaust when the forced exhaust system is driven. The ventilation system for a highly airtight and highly insulated house according to claim 1, wherein the ventilation amount increases by almost the same amount as the system displacement. 4. The ventilation system for a highly airtight and highly insulated house according to claim 1, wherein the air supply fan is controlled by an output of an airflow sensor installed in the air supply duct and a set airflow.