JP5483051B2 - Residential ventilation system - Google Patents

Description

  The present invention attaches a greenhouse in a direction with a large amount of solar radiation, such as the south side of a house, and this greenhouse supplies fresh air to the living room using heat storage etc. that has become high due to solar heat, so that in winter etc. The present invention relates to a housing ventilation system that is effective in reducing heat loss associated with housing ventilation.

Due to the revision of the Building Standards Act in 2003, it was obliged to install mechanical ventilation systems with ventilation capacity of 0.5 times / hour or more in houses.
Therefore, a ventilation method has been adopted in which the outside air and the indoor air are switched using a fan set in a wall or ceiling.
However, simply taking outside air causes a problem that the outside air is cooler than the air in the living room in winter and the like, and conversely, the outside air is hot in summer and the like, and the outside air load increases with ventilation.

  In Japan, the heating load is larger than the cooling load in houses in most areas from Hokkaido to the mainland of Kagoshima Prefecture, and it is important to take measures to reduce the heating load by utilizing natural energy.

In the Pacific region of the Tohoku region, there is an example where a space connecting the outside and inside that functions as a greenhouse is provided on the south side of the house, and the air heated during the day is taken into the room by opening a partition window. It is done.
However, since the opening / closing operation of windows and the like depends on the resident, the thermal effect is limited, and it is often positioned as a hobby space for growing plants indoors in winter.
Patent Document 1 discloses a technique for effectively using solar heat and comfortably ventilating a living room by utilizing a solarium close to this idea, but the thermal effect is still limited.

Patent Document 2 discloses a technique in which a solar heat collecting part formed by forming an air flow path is provided directly below a roof plate, and heated air is caused to flow down to the floor using a falling duct.
However, the solar heat collector provided directly below the roof plate disclosed in the publication is insufficient in capability to be used for heating ventilation air throughout the winter season. There is also a problem that the installation location competes with other energy saving systems such as the use of photovoltaic power generation and solar water heaters.

The underground temperature has a smaller annual fluctuation than the air temperature in the atmosphere, and the average value is stable at about 15 ° C in most areas of Honshu.
Therefore, there are some experimental houses that introduce air that is cooler than the outside air in the summer by introducing the outside air through a heat and cool tube system embedded in the ground, and that has a ventilation air that is warmer than the outside air in the winter. It is done.
However, the inventors of the present application obtained a subsidy for leading technology development from the Ministry of Land, Infrastructure, Transport and Tourism, and obtained winter heat from the measurement results of a model house with a heat and cool tube ventilation system built in Toyama City in 2006 The effect is only about 540 W in January, and the heat removal effect in summer is only about 380 W in August. Considering the installation cost of the system, underground heat alone is insufficient (Non-Patent Document 1) ).

Japanese Patent Laid-Open No. 8-159531 JP 2006-98025 A

“Research on energy-saving effect by heat and cool tube system” MINOHARA Yuki, TARUMI Hiroo, 2 others, Annual Conference of Architectural Institute of Japan, September 2008, P625,626

  An object of the present invention is to provide a residential ventilation system that can reduce the outdoor air load and indoor heating load of ventilation in winter by effectively utilizing natural energy and natural condition changes.

The present inventors paid attention to the effect of increasing the temperature of the outside air obtained by attaching a greenhouse to the house and the use of the heat storage effect by a heat tube buried directly under or around the house, leading to the present invention. .
A residential ventilation system according to the present invention is a residential ventilation system including a greenhouse that collects and stores solar heat, and is connected to the interior of the greenhouse by a heat tube having a ventilation function, The tube is connected to the floor of the greenhouse from the lower surface of the roof in the greenhouse, through the underground section of 1 m or more below the ground surface where the geothermal effect can be obtained, and the floor of the living room. It has an air outlet inside and is piped so as not to touch the outside air , the greenhouse has a transparent panel attached to the roof and wall, and the floor has a functional thickness as a heating surface of the greenhouse air It is formed of a heat storage material made of concrete or stone of 30 cm or more, and an outside air intake for taking outside air into the greenhouse is provided from the floor surface.

  In addition, in order to take in warm air from the greenhouse into the living room during the winter, and to take in outside air, which has a lower temperature than that in the greenhouse, during the summer, the heat tube has an air intake and an outside air intake from the greenhouse. Are preferably switchable.

  Furthermore, the greenhouse has a transparent panel attached to the roof and walls, the floor is made of heat storage material, and the air intake of the heat tube is provided from the lower surface of the roof, taking outside air into the greenhouse. The entrance is preferably provided from the floor.

The house ventilation system according to the present invention significantly increases the temperature of fresh outside air in a greenhouse attached to the house, and then passes through the ground having a large heat storage capacity, so that the effect of heating the outside air during the daytime can be increased to nighttime. It can be extended, and the heat stored on the ground on a clear day can be used on the following cloudy and rainy days.
In addition, the present invention provides a ground on the downstream side of the greenhouse that functions as a heating device in the order in which the ventilation air passes, so that this ground functions as a heat storage and heat dissipation buffer, and sunshine heat on a clear day is prolonged. It can be taken out as ventilation air at a stable temperature.

Great effect is expected especially in areas where there is a lot of solar radiation in winter.
For example, in Tokyo and the like, there is almost no heating load during the daytime on a sunny day, and there are cases where the windows are opened due to overheating depending on the day.
However, a heating load is generated from the night to dawn as the outside air temperature decreases.
In houses in such areas, the application of the house ventilation system makes it possible to extract the heat stored in the ground during the daytime and use it effectively at night, and to significantly reduce the heating load throughout the winter season.

The air flow in winter is shown in the residential ventilation system according to the present invention. The top view of the heat tube arrangement example is shown as a perspective view. The air flow in the summer is shown in the residential ventilation system according to the present invention.

The structural example of the house ventilation system which concerns on this invention is typically shown in FIGS.
A greenhouse 20 is attached at a position where relatively strong solar radiation is applied, such as the south side of the living room 10 of the house.
It is preferable that the size of the greenhouse 20 is set to be large so that the ventilation of the house can correspond to 0.5 times / hour.
The purpose of the greenhouse 20 is to warm the outside air in the winter, and it is preferable to attach a transparent panel body such as glass to the roof 21 and the side wall 22, and a ventilation gallery 24 for taking outside air into the greenhouse is provided on the floor. It is provided near 23.
In addition, it is good to provide a window in a side wall etc. so that it can open large except in winter.
The floor 23 of the greenhouse 20 stores solar heat, and preferably functions as a heating surface for air in the greenhouse. The thickness is preferably about 30 cm or more using concrete or stone.
The floor should be thicker, but is generally 60-80 cm or less.
Thereby, even after sunset, the temperature drop of the air in the greenhouse becomes gentle due to heat radiation from the floor.
The roof 21 is preferably provided with an inclined surface or the like and a portion where high temperature air tends to stay under the roof.
In the present embodiment, the roof is inclined so that the side of the living room 10 becomes high, high-temperature air is guided to the corner 21a having a high roof, and the air intake 31a of the rising portion 31 in the greenhouse of the heat tube 30 is disposed in this portion.
The heat tube 30 is a pipe having a diameter of about 15 to 20 cm, and preferably has a high thermal conductivity and high corrosion resistance against moisture.
Although vinyl chloride piping may be used from a cost aspect, SUS piping is preferable from the viewpoint of thermal conductivity and the like.
The heat tube 30 has a switching valve 31b such as a damper in the middle of the rising portion 31 in the greenhouse, piped from the floor 23 of the greenhouse 20 toward the ground, and buried in the ground below the ground surface. The living room rising portion 33 raised from the floor of the living room 10 and the ventilating device 40 provided in the living room are connected to each other via 32.
The ventilator 40 is provided with a fan and a control panel, and air in the greenhouse is blown out as ventilating air from an outlet 41 provided in the ventilator 40.
In order to obtain a sufficient geothermal effect, the buried portion 32 of the heat tube 30 should be 1 m or more below the ground surface, preferably 1.5 m or more, and 3 m or less in terms of the construction cost.
Moreover, although the burying part 32 may be just under a house, in this embodiment, it is an example of being embedded around the house as shown in FIG.
In addition, in FIG. 2, the heat tube part embed | buried under the floor part and the ground is also shown as the continuous line.

In winter, the greenhouse 20 is used for the purpose of reducing the heating load. In summer, as shown in FIGS. 2 and 3, outside air is taken in from the outside air intake 34a of the outdoor rising portion 34, and the buried portion 32 is used as a cool tube. Make it work.
Therefore, switching between winter and summer can be performed by the switching valve 31b provided in the greenhouse rising portion 31 and the switching valve 34b provided in the outdoor rising portion 34.

10 Living room 20 Greenhouse 21 Roof 22 Side wall 23 Floor 30 Heat tube 31a Inlet 40 Ventilator 41 Air outlet

Claims (2)

A residential ventilation system with a greenhouse that collects and stores solar heat,
The inside of the greenhouse and the living room of the house are connected with a heat tube having a ventilation function,
The heat tube passes from the air intake provided from the lower surface of the roof in the greenhouse via the floor of the greenhouse and the underground section of 1 m or more below the ground surface where the geothermal effect is obtained and the floor of the living room, It has an air outlet in the living room and is piped so as not to touch the outside air .
The greenhouse has a transparent panel attached to the roof and walls, and the floor is formed of a heat storage material made of concrete or stone with a thickness of 30 cm or more that functions as a heating surface for the air in the greenhouse, taking outside air into the greenhouse. A residential ventilation system characterized in that an outside air intake is provided from the floor .   2. The residential ventilation system according to claim 1, wherein the heat tube is switchable between an air intake port from the greenhouse and an outside air intake port.

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