JP2011052918A - Energy saving ventilation system - Google Patents

Energy saving ventilation system Download PDF

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JP2011052918A
JP2011052918A JP2009203500A JP2009203500A JP2011052918A JP 2011052918 A JP2011052918 A JP 2011052918A JP 2009203500 A JP2009203500 A JP 2009203500A JP 2009203500 A JP2009203500 A JP 2009203500A JP 2011052918 A JP2011052918 A JP 2011052918A
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heat exchange
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outside air
room
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JP4524348B1 (en
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Zenjiro Honda
本田善次郎
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<P>PROBLEM TO BE SOLVED: To provide an energy saving ventilation system reducing thermal loss caused by ventilation during heating in winter and cooling in summer in a detached house, saving heating/cooling energy and reducing drive energy of an air blowing fan. <P>SOLUTION: A three-way selector valve is provided between an outside air introduction port and a total heat exchange element. The energy saving ventilation system enables switching operation between a total heat exchange type class 1 ventilation system in which the drive energy of the air blowing fan is large and a burden of the heating/cooling energy caused by ventilation is reduced and a class 3 ventilation system in which heat exchange is not performed and the drive energy of the air blowing fan is small, by switching an air supply method of the ventilation system by the three-route switch valve, judging from outside air temperature and indoor temperature. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、省エネルギー換気システムに関し、より詳しくは、戸建住宅において冬季の暖房時及び夏季の冷房時における換気による熱損失が少なく、冷暖房エネルギーを節減し、且つ送風ファンの駆動エネルギーの小さい省エネルギー換気システムに関する。   The present invention relates to an energy-saving ventilation system, and more particularly, in a detached house, there is little heat loss due to ventilation during heating in winter and cooling in summer, energy-saving ventilation is saved, and energy saving ventilation is low in driving energy of the blower fan. About the system.

高気密高断熱住宅は、その内部に断熱構造を組込み、かつ気密状態を高めることで室内外の自然漏気を極力抑え、冷暖房エネルギー効果が得られるという利点があって普及してきた。また、高気密高断熱住宅は、室内外壁を連通する隙間が少ないために、外気の屋内への進入による自然換気量が少なく、かつ家屋内の上下空間における温度差も小さいために、家屋内での空気循環量が少ないことから、機械換気装置による強制換気システムが採用されている。
この強制換気システムの方法としては、各部屋で個別の換気装置によって換気する局所換気と、ダクトにて各室に給気及び/又は排気を行う集中換気装置を設けるセントラル換気とに大別される。前記セントラル換気には、給気と排気を同時に機械的に行う第1種換気方法、自然排気口を設けて給気を機械的に行う第2種換気方法、及び自然給気口を設け各室からの排気を機械的に行う第3種換気方法とがある。
Highly airtight and highly insulated houses have become popular because they have the advantage of incorporating a heat insulation structure inside and enhancing the airtight state to suppress natural air leakage inside and outside the room as much as possible and to obtain an air conditioning energy effect. In addition, high airtight and highly insulated houses have few gaps communicating with the interior and exterior walls.Therefore, the amount of natural ventilation due to the entry of outside air into the interior is small, and the temperature difference between the upper and lower spaces inside the house is small. Because of the small amount of air circulation, a forced ventilation system using mechanical ventilation is used.
The method of this forced ventilation system is roughly classified into local ventilation in which ventilation is performed by an individual ventilation device in each room, and central ventilation in which a centralized ventilation device is provided to supply and / or exhaust air to each room by a duct. . The central ventilation includes a first type ventilation method that mechanically supplies and exhausts air simultaneously, a second type ventilation method that mechanically supplies air by providing a natural exhaust port, and a natural air supply port. There is a third type ventilation method that mechanically exhausts air from the air.

この第2種換気方法及び第3種換気方法では、給気又は排気のどちらか一方の送風ファンの駆動エネルギーで足りるが、冷暖房された室内空気は、そのまま外部に排気されるので冷暖房エネルギーの浪費が多い。第1種換気方法では、冷暖房設備を稼動させる期間は、給気と排気の間で顕熱、または顕熱と潜熱の両方を熱交換することによって、冷暖房エネルギーの一部を回収することにより省エネルギー化を図っているが、送風ファンを用いて強制的に給気と排気を行うため、第2種換気方法や第3種換気方法に比べて、大きい送風ファンの駆動エネルギーを必要とする。
また熱交換型第1種換気方法は、年間を通じて給気も排気も機械的に熱交換素子に送風されているので、春や秋などで空調設備の冷暖房運転を必要としない、即ち熱交換換気を必要としない期間でも、給気と排気の両方の送風エネルギーを消費する。熱交換を必要としない時期には、熱交換をしない第3種換気方法のように、送風ファン駆動エネルギーの少ない換気方法が好ましい。
しかし、戸建住宅の換気システムでは、外気温や室内温度によって熱交換できる第1種換気方法と、熱交換はしないで送風ファンに駆動エネルギーの小さい第3種換気方法を選択し採用することはできない。
In the second type ventilation method and the third type ventilation method, the driving energy of either the supply air or the exhaust air is sufficient, but the air-conditioning indoor air is exhausted to the outside as it is, so the waste of air-conditioning energy There are many. In the first type ventilation method, the air conditioning equipment is operated for a period of time during which the sensible heat is exchanged between the supply air and the exhaust air, or both sensible heat and latent heat are exchanged to recover a part of the air conditioning energy. However, in order to forcibly supply and exhaust air using a blower fan, a larger drive energy for the blower fan is required compared to the second and third type ventilation methods.
In the heat exchange type 1 ventilation method, since air supply and exhaust are mechanically blown to the heat exchange element throughout the year, there is no need for air conditioning operation in spring or autumn, that is, heat exchange ventilation. Even during periods where no air conditioning is required, both the air supply and exhaust air are consumed. At the time when heat exchange is not required, a ventilation method with less blowing fan drive energy is preferable, as in the third type ventilation method without heat exchange.
However, in a ventilation system for a detached house, it is not possible to select and use the first type ventilation method that can exchange heat according to the outside air temperature or the room temperature, and the third type ventilation method that does not exchange heat and uses a small driving energy for the blower fan. Can not.

高気密高断熱の住宅では、屋内での室内自然発熱および住宅の日射取得熱によって、室温は外気温に対し数℃〜20℃程度高くなる。これは屋内では居住者自身からの放熱が、大人1人あたり100W程度あるためとされている。また照明器具、家電およびパソコンなどの各種の電気機器からの放熱も多く、通常待機消費電力量を含めると家庭内での消費電力の20〜30%程度が室内に放熱しているようである。住宅ではこれら室内自然発熱と言われる取得熱の他に、日射取得熱も多い。このため熱損失の少ない高気密高断熱の住宅では、屋内での室内自然発熱および住宅の日射取得熱によって、室温は外気温に対し数℃〜20℃程度高くなる。これらの住宅が取得する熱は、空調設備で暖房運転が必要な冬季には暖房エネルギーの節減になるが、夏季では冷房負荷の増大となるし、通常なら空調設備の冷房運転が不要な中間期で、外気温が適温でも室内温度が上がり過ぎて冷房運転が必要となる場合がある。
この様に外気が好適温度であるが、室内自然発熱や日射取得熱によって室内温度が上がり過ぎている場合に、熱交換型換気を行うと、好適温度の外気を室内排気の熱で温めて室内に給気することになり、室内の快適性を損なうことになってしまう。この様な場合には、熱交換を行わない第3種換気方法で、好適温度の外気をそのままの温度で室内に給気するのが好ましい。
また夏季では、昼間の外気は室内温度よりも高いが、夜間では外気が27℃以下となり室温よりも低くなる。この様な場合にも外気を室内に給気する場合、より温度の高い室内排気とは熱交換しないで、好適温度の外気をそのまま室内に給気するのが好ましい。 しかし、従来の換気システムでは、熱交換型の第1種換気方法と非熱交換型の第3種換気方法とを切り替えて運転する換気システムがなかったので、熱交換型の第1種換気システムを採用すると、通年熱交換型第1種換気システムで運転するか、第3種換気システムを採用すると通年第3種換気方法で運転するしかなかった。
In a highly airtight and highly heat-insulated house, the room temperature becomes higher by about several degrees C. to 20 degrees C. than the outside air temperature due to indoor natural heat generation indoors and solar heat acquisition heat of the house. This is because indoor heat dissipation is about 100 W per adult. Also, heat is radiated from various electric devices such as lighting fixtures, home appliances, and personal computers, and it seems that about 20 to 30% of the power consumption in the home is radiated indoors, including the standby power consumption. In a house, in addition to the acquired heat, which is said to be indoor natural heat generation, there is also a lot of solar heat acquired. For this reason, in a highly airtight and highly insulated house with a small heat loss, the room temperature becomes higher than the outside air temperature by about several degrees C. to 20 degrees C. due to indoor natural heat generation inside the house and solar radiation acquisition heat of the house. The heat acquired by these houses will save heating energy in the winter when air conditioning equipment requires heating operation, but it will increase the cooling load in summer, and normally it will not require air conditioning cooling operation. In some cases, even if the outside air temperature is appropriate, the room temperature rises too much and cooling operation is required.
In this way, the outside air is at a suitable temperature, but when the room temperature is too high due to indoor natural heat generation or heat acquired by solar radiation, if heat exchange ventilation is performed, the outside air at the preferred temperature is warmed with the heat of the room exhaust. The air will be supplied, and the comfort in the room will be impaired. In such a case, it is preferable to supply the outside air at a suitable temperature to the room at the same temperature by the third type ventilation method that does not perform heat exchange.
In summer, the outside air during the daytime is higher than the room temperature, but at night, the outside air is 27 ° C. or lower and is lower than the room temperature. Even in such a case, when the outside air is supplied into the room, it is preferable that the outside air at a suitable temperature is supplied into the room as it is without exchanging heat with the indoor exhaust having a higher temperature. However, in the conventional ventilation system, there is no ventilation system that operates by switching between the heat exchange type 1 type ventilation method and the non-heat exchange type 3 type ventilation method, so the heat exchange type 1 type ventilation system When adopting, the year-round heat exchange type 1 ventilation system can only be operated, or when the type 3 ventilation system is adopted, the year-round type 3 ventilation method can only be operated.

ところで、熱交換型換気方法の場合は、熱交換素子部で給気と排気とを出合わせて、顕熱の交換または顕熱と潜熱の両方を交換する。熱交換素子は、熱交換器中に装着されているが、その維持管理上、装脱着が可能な構造となっている。このため熱交換素子と熱交換器との間には、若干の隙間ができ、この隙間があるために、排気の一部が給気に循環混合されて室内に給気される。また排気中の有害化合物が熱交換素子の素材そのものを透過する場合にも、排気中の有害化合物の一部が給気側に混合することになる。従って、トイレなど臭気の強い排気を熱交換器に通すと、臭い成分の一部が給気側に戻ることがあるので、トイレなどには別途トイレ専用の局所換気設備を設置するか、第3種換気方法で熱交換をしないで排気する方式を行ってきた。   By the way, in the case of the heat exchange type ventilation method, the supply air and the exhaust gas are combined in the heat exchange element unit, and exchange of sensible heat or both sensible heat and latent heat is exchanged. The heat exchange element is mounted in the heat exchanger, but has a structure that can be attached and detached for maintenance. For this reason, there is a slight gap between the heat exchange element and the heat exchanger. Because of this gap, a part of the exhaust gas is circulated and mixed into the supply air and supplied to the room. Further, even when harmful compounds in the exhaust gas permeate the material of the heat exchange element, some of the harmful compounds in the exhaust gas are mixed with the supply side. Therefore, if exhausts with strong odors such as toilets are passed through the heat exchanger, some of the odorous components may return to the air supply side. The method of exhausting without heat exchange by the seed ventilation method has been performed.

基礎断熱工法による高気密高断熱住宅の床下空間は、外気とは閉ざされた密閉空間となっている。温暖地域などでは、夏季の外気の相対湿度が高いときは、外気より気温の低い床下空間の相対湿度が80%以上となり、かびや腐敗菌が発生しやすい条件が整う場合がある。また、床下全面にコンクリートを打設する場合には、コンクリートが乾燥するまでの2年間程度は、コンクリートからの水分蒸発があり、床下空間の相対湿度が外気よりも高くなる。
これらの問題点の解決策として、床下空間の空気を外部へ排気し、外部より外気を床下空間に給気するか、又は床下空間に専用の除湿装置を設置して床下除湿を行う等の床下空間の環境対策が行われている。さらに省エネルギーを目的として床下空間を利用する換気システムの提案がなされている。これらの提案は、床下空間を利用することによって住宅環境の快適性向上あるいは冷暖房エネルギーの節減に貢献しているが、それぞれ以下のような課題がある。
The underfloor space of a highly airtight and highly insulated house by the basic insulation method is a sealed space that is closed from outside air. In a warm area or the like, when the relative humidity of the outdoor air in summer is high, the relative humidity of the underfloor space where the temperature is lower than that of the outdoor air is 80% or more, and the condition that mold and spoilage bacteria are likely to occur may be established. In addition, when concrete is placed all over the floor, the moisture from the concrete evaporates for about two years until the concrete dries, and the relative humidity in the underfloor space becomes higher than the outside air.
The solution to these problems is to exhaust the air in the underfloor space to the outside and supply outside air to the underfloor space from the outside, or install a dedicated dehumidifier in the underfloor space to perform underfloor dehumidification. Spatial environmental measures are being taken. In addition, a ventilation system that uses the underfloor space has been proposed for energy saving. These proposals contribute to improving the comfort of the residential environment or saving energy for air conditioning by using the underfloor space, but each has the following problems.

まず、温度差を利用した無動力の強制排気が行え、かつ設備構成が簡単な換気システムとして、基礎断熱を施した寒冷地用の低層建物において、外気を床下空間に導入する給気経路を設ける。その導入された外気を、床下空間を経由して建物の室内に導き、小屋裏部の排気口から屋外に排気する換気経路を設ける。1階の天井裏空間を、2階の各部屋への換気経路として利用し、また給排水管用のパイプスペースを、床下空間と天井裏空間とを連通させる竪ダクトとして利用する(例えば、特許文献1参照)。
この換気システムは、寒冷地用の低層建物には有効であるが、温暖地では夏季に高温多湿の外気が常時床下空間に給気されるために、外気より温度が低い床下空間では相対湿度がさらに高くなり、床下空間の環境が悪化する問題がある。
First, as a ventilation system that can perform non-powered forced exhaust using temperature differences and has a simple equipment configuration, a low-rise building for cold districts with basic insulation is provided with an air supply path for introducing outside air into the underfloor space . The introduced outside air is led to the interior of the building through the underfloor space, and a ventilation path is provided for exhausting the air from the exhaust port at the back of the hut to the outside. The ceiling back space on the first floor is used as a ventilation path to each room on the second floor, and the pipe space for the water supply / drainage pipe is used as a culvert duct that connects the under floor space and the ceiling back space (for example, Patent Document 1). reference).
Although this ventilation system is effective for low-rise buildings for cold regions, hot and humid outside air is constantly supplied to the underfloor space in the summer, the relative humidity is low in the underfloor space where the temperature is lower than the outside air. There is a problem that the environment of the underfloor space deteriorates even higher.

また、床下空間の温度環境を室内とほぼ同一にして床面のコ−ルドドラフト感を抑えるとともに床下空間内の化学物質を排出できる換気システムとして、室外と連通する通気窓のない基礎断熱構造の床下空間上に、床部を介して形成される複数の室内と床下空間をそれぞれ連通する通気口と、吐出口を室外と連通し、換気チュ−ブを介して吸込口を床下空間と連通した換気装置とを設ける(例えば、特許文献2参照)。
この換気システムは、床下空間の温度環境等は改善されるが、一般に外気の温度に大きく左右されずに夏季には涼しく冬季には温かいといわれる床下空間の特性を省エネルギーに十分に活用していない。
In addition, as a ventilation system that can suppress the cold draft of the floor surface by making the temperature environment of the underfloor space almost the same as that of the room and discharge chemical substances in the underfloor space, it has a basic heat insulation structure with no ventilation window communicating with the outside. On the underfloor space, a plurality of rooms formed through the floor and the vents communicating with the underfloor space, the discharge port communicated with the outside, and the suction port communicated with the underfloor space via the ventilation tube. A ventilation device is provided (for example, refer to Patent Document 2).
Although this ventilation system improves the temperature environment of the underfloor space, it does not take full advantage of energy-saving characteristics of the underfloor space, which is generally said to be cool in the summer and warm in the winter without being greatly affected by the temperature of the outside air. .

また、暖房装置によって暖められた室内空気を屋外に排出する際に、排気熱の熱損失を最小限に抑えつつ玄関ドアまわりの融雪を行うシステムとして、床下空間に外気を導入し、床下空間の空気を家屋内に循環させる一方、排気経路は、各室内の空気を床下空間において集約し、集約した排気を玄関ドアの外側近傍箇所において排出する(例えば、特許文献3参照)。
このシステムは、冬季は低い温度の外気を床下空間で熱交換して暖めた後室内に給気して、暖房エネルギーの節減に貢献し、かつ温かい排気を融雪に利用することができる第3種換気の方法による省エネルギーシステムである。
上記のように、地下熱により冬は温かく夏は涼しい床下空間を熱交換媒体として利用する第3種換気の方法によるシステム(以下、地下熱利用換気システムと呼称する場合がある。)では、冬季は室内への給気の温度を高く、夏季は低くすることによって冷暖房エネルギーの節減を図ることができる。しかしながら、温暖地で前記地下熱利用換気システムを採用すると、夏季及び冬季にそれぞれの問題が生じる。
In addition, when exhausting indoor air heated by a heating device to the outside, as a system to melt snow around the front door while minimizing heat loss of exhaust heat, outside air is introduced into the underfloor space, While the air is circulated into the house, the exhaust path collects the air in each room in the under-floor space and discharges the collected exhaust at a location near the outside of the entrance door (see, for example, Patent Document 3).
This system is the third type that can contribute to the reduction of heating energy by using heat exchange of the low temperature outside air in the underfloor space in the winter and then supplying the air to the room, and can use warm exhaust for melting snow. It is an energy saving system by the method of ventilation.
As described above, in a system using the third type ventilation method (hereinafter, sometimes referred to as an underground heat-utilizing ventilation system) that uses an underfloor space that is warm in winter and cool in summer due to underground heat as a heat exchange medium, it is winter. Can save energy for air conditioning by increasing the temperature of the air supply to the room and lowering it in the summer. However, if the underground heat-utilizing ventilation system is adopted in a warm region, problems arise in summer and winter.

夏季には高温多湿の外気が常時床下空間に給気されるが、床下空間は外気より温度が低いので相対湿度はさらに高くなり、そこで家屋内に相対湿度の高い空気が供給されるという問題がある。これは、室内空気を空調するために必要な消費エネルギーの内訳は、室温の低下に使う部分よりも除湿に使う部分が多いからである。また、このとき前記床下空間の環境は、かびや腐敗菌繁殖の適合環境へと悪化するという問題が生じる。
また冬季には、逆に外気の相対湿度が低くなるために床下空間の湿度も低くなる。そのまま室内に給気すると、室内での温度上昇にともない室内空気の相対湿度がさらに低くなる。このため室内空気は過乾燥状態となり、のどを痛めやすく、また風邪ウイルスが繁殖しやすく風邪をひき易くなる環境へと悪化するという問題が生じる。
In summer, hot and humid outside air is constantly supplied to the underfloor space, but the underfloor space is lower in temperature than the outside air, so the relative humidity becomes higher, and there is a problem that air with high relative humidity is supplied to the house. is there. This is because the breakdown of the energy consumption necessary for air-conditioning indoor air is more for dehumidification than for lowering the room temperature. In addition, at this time, there is a problem that the environment of the underfloor space deteriorates to an environment suitable for mold and rot propagation.
In winter, on the other hand, the relative humidity of the outside air decreases, so the humidity in the underfloor space also decreases. If the air is supplied to the room as it is, the relative humidity of the room air further decreases as the temperature rises in the room. For this reason, the indoor air becomes overdried, and there is a problem that the throat is easily aggravated and the cold virus is easily propagated and the environment becomes easy to catch a cold.

以上の状況から、家屋内に供給する空気の温度のみならず相対湿度を効率的に調整して、住宅環境の快適性と省エネルギーを兼ね備えた換気システムが求められ、本出願人は、床下空間に外気を導入し、床下空間の空気を家屋内に循環させる一方、排気経路は、各室内の空気を床下空間において集約して排出する換気システムにおいて、排気経路に使用するアルミダクトの代わりの透湿機能を有する材質からなる透湿ダクトを用いることによって、室内排気空気と床下空間の給気とで湿度交換をすることを提案した(特許文献4参照)。 これによって夏季冷房期での床下空間の高湿化や、冬季暖房期の床下空間の過乾燥防止を図ることができたが、床下空間に配置された透湿ダクトだけでは透湿ダクト内の室内排気と床下給気との間で充分な顕熱や潜熱の交換が行われない。
これら従来の住宅用の換気システムは、熱交換素子で給気と排気とを熱交換することで換気による冷暖房エネルギーを節減するが、給気と排気の両方の送風ファン駆動エネルギーを使用する熱交換型第1種換気方法か、給気と排気とで熱交換はしないが排気ファンの駆動エネルフィーだけでよい第3種換気方法のどちらかが用いられてきた。すなわち、従来の住宅では、外気温や室内温度によって熱交換型第1種換気方法か非熱交換型の第3種換気方法に固定され、他の方法に切り替え運転することはできず、より省エネルギーとなる換気方法を選択し運転ができるシステムが必要とされていた。
From the above situation, there is a need for a ventilation system that efficiently adjusts not only the temperature of the air supplied to the house but also the relative humidity and combines the comfort and energy saving of the residential environment. While introducing the outside air and circulating the air in the underfloor space into the house, the exhaust path is a moisture transmission system instead of the aluminum duct used for the exhaust path in a ventilation system that collects and exhausts the air in each room in the underfloor space. By using a moisture permeable duct made of a material having a function, it has been proposed to exchange humidity between the indoor exhaust air and the air supply in the underfloor space (see Patent Document 4). As a result, it was possible to increase the humidity of the underfloor space during the summer cooling period and to prevent overdrying of the underfloor space during the winter heating period. Not enough sensible heat or latent heat is exchanged between the exhaust and the underfloor air supply.
These conventional residential ventilation systems save heat and air cooling energy by exchanging heat between the supply air and exhaust air with a heat exchange element, but heat exchange using air supply fan exhaust energy for both supply air and exhaust air Either a type 1 type ventilation method or a type 3 ventilation method that does not exchange heat between supply air and exhaust, but only requires driving energy of an exhaust fan has been used. That is, in a conventional house, it is fixed to the heat exchange type 1 type ventilation method or the non-heat exchange type 3 type ventilation method depending on the outside air temperature and the room temperature, and it cannot be switched to another method and is operated more efficiently. There was a need for a system that could be operated by selecting the appropriate ventilation method.


特開平10−325578号公報(第1頁、第2頁)JP-A-10-325578 (first page, second page) 特開2000−18668号公報(第1頁、第2頁)JP 2000-18668 (first page, second page) 特開2000−304328号公報(第1頁、第2頁)JP 2000-304328 A (first page, second page) 特開2004−263971号公報(第1頁、第2頁)JP 2004-263971 A (first page, second page)

本発明の目的は、上記の従来技術の問題点に鑑み、外気温と空調設備による冷暖房運転状況による室内温度を検知して全熱交換型換気方法と非熱交換型で送風消費電力の少ない第3種換気方法を選択しながら運転できる省エネルギーの換気システムを提供すること;また床下空間は地中熱によって冬は温かく、夏は涼しいので、外気は床下空間を経由して室内に給気する換気システムを提供すること;さらにトイレなど不快臭の多い部位からの排気は全熱交換素子を経ると一部が給気側に循環混合される可能性があるので、トイレなどの臭気が強い部位からの排気は、同じ換気システムで全熱交換素子部をへないで、直接屋外に排気する換気システムを提供することにある。   In view of the above-mentioned problems of the prior art, the object of the present invention is to detect the room temperature according to the outside air temperature and the cooling / heating operation status of the air conditioning equipment, and to reduce the blast power consumption with the total heat exchange ventilation method and the non-heat exchange type. Provide an energy-saving ventilation system that can be operated while selecting three types of ventilation methods; the underfloor space is warm in the winter due to underground heat and cool in the summer, so that the outside air is supplied to the room via the underfloor space Providing a system; exhaust air from parts with a lot of unpleasant odors such as toilets may be partly circulated and mixed to the air supply side after passing through the total heat exchange element. The purpose of this is to provide a ventilation system that exhausts directly to the outside without passing through the entire heat exchange element section in the same ventilation system.

本発明は、上記目的を達成するために、高気密高断熱住宅の換気システムにおいて、冷房季の暖房費の節減と室内の過乾燥の防止、夏季の冷房費の節減と床下環境の改善及び春や秋の中間期における換気設備の送風機運転の電力消費量減少について鋭意研究を重ねた結果、外気導入口と前記全熱交換素子との間に三路経路切り替えバルブを設置し、切り替えバルブを操作することで、外気は床下に給気し、床下空間を経路として室内に給気し、室内の各室からの排気はダクトで床下設置のチャンバーに集約して屋外に排出し、冷暖房設備に運転が必要な場合には給気と排気とを全熱交換器で顕熱と潜熱とを交換する第1種換気方法を採用し、一方、冷暖房運転が不要な春や秋の中間季や夏季で外気温が室内温度よりも低い夜間などには、給気と排気とで熱交換をしないで自然給気とする第3種換気方法を採用できるようにした。さらに室内換気は、全熱交換型第1換気方法で運転しながらトイレの臭気が全熱交換素子部で給気側へ移動することを防止できるようにした。   In order to achieve the above object, the present invention provides a ventilation system for a highly airtight and highly insulated house, which reduces heating costs in the cooling season and prevents indoor overdrying, reduces cooling costs in summer, improves underfloor environment, and springs. As a result of earnest research on reducing the power consumption of the ventilation equipment blower operation in the middle of autumn and autumn, a three-way switching valve was installed between the outside air inlet and the total heat exchange element, and the switching valve was operated. As a result, outside air is supplied under the floor, and the indoor air is supplied through the under-floor space. The exhaust from each room in the room is collected by a duct into a chamber installed under the floor and discharged to the outside for operation to the air conditioning equipment. In the middle of spring and autumn and in summer when air conditioning operation is not required, the first type ventilation method is used, in which sensible heat and latent heat are exchanged with a total heat exchanger for supply and exhaust. Air supply at night when the outside temperature is lower than the room temperature And to be able to adopt a third type ventilation method for a natural air supply without heat exchange with the exhaust. Furthermore, the indoor ventilation can prevent the odor of the toilet from moving to the supply side at the total heat exchange element while operating by the total heat exchange type first ventilation method.

すなわち、本発明の第1の発明によれば、外気を外気導入口から家屋内に導入する給気経路と、各室内の空気を屋外へ排出する排気経路とを備える住宅の換気システムにおいて、前記給気経路は、外気を給気ファンで全熱交換素子に導入した後、床下空間に放出し、床下空間を経由後、屋内に給気する第1の給気経路と、給気ファンを停止して外気を全熱交換素子に導入せずに、床下空間に放出する第2の給気経路からなり、一方、前記排気経路は、室内空気を各室内に接続された排気ダクトを経て床下設置のチャンバーに集約した後、排気ファンで前記全熱交換素子に導入し、給気と排気とで熱交換した後、又は熱交換せずに屋外に排出する経路から構成し、かつ外気導入口から前記全熱交換素子との間の給気パイプに三路経路切り替えバルブを備え、外気を第1の給気経路に導入する全熱交換型第1種換気方法と、外気を第2の給気経路に導入する第3種換気方法とを前記三路経路切り替えバルブによって選択可能としたことを特徴とする省エネルギー換気システムが提供される。   That is, according to the first aspect of the present invention, in a residential ventilation system comprising an air supply path for introducing outside air into the house from the outside air inlet, and an exhaust path for discharging air in each room to the outside, In the air supply path, outside air is introduced into the total heat exchange element with an air supply fan, then discharged to the underfloor space, and after passing through the underfloor space, the first air supply path for supplying air indoors and the air supply fan are stopped. Thus, the outside air is not introduced into the total heat exchanging element, but is composed of a second air supply path that discharges to the underfloor space. On the other hand, the exhaust path is installed under the floor through an exhaust duct connected to each room. After being collected in the chamber, the exhaust fan introduces it into the total heat exchange element, and after exchanging heat between the supply air and the exhaust, or without discharging the heat, it is configured to have a path that discharges to the outside, and from the outside air inlet A three-way path switching bar is connected to the air supply pipe between the total heat exchange elements. The three-way path switching valve includes a total heat exchange type first type ventilation method that introduces outside air into the first air supply path, and a third type ventilation method that introduces outside air into the second air supply path. An energy saving ventilation system is provided, which is characterized by being selectable by.

また、本発明の第2の発明によれば、第1の発明において、全熱交換型第1種換気方法で換気するときは、前記第1の給気経路から外気を給気ファンで全熱交換素子に導入した後、床下空間に放出し、床下空間を経由後、屋内に給気し、室内空気を各室内に接続された排気ダクトを経て床下設置のチャンバーに集約した後、排気ファンで前記全熱交換素子に導入し、給気と排気とで熱交換した後、屋外に排出することを特徴とする省エネルギー換気システムが提供される。   According to the second aspect of the present invention, in the first aspect, when ventilating by the total heat exchange type 1 type ventilation method, the outside air is totally heated by the supply fan from the first supply path. After being introduced into the exchange element, it is discharged into the underfloor space, passed through the underfloor space, then supplied indoors, and the indoor air is aggregated into an underfloor chamber through an exhaust duct connected to each room, and then exhausted with an exhaust fan. An energy-saving ventilation system is provided, which is introduced into the total heat exchange element, heat-exchanged between supply air and exhaust, and then discharged to the outside.

また、本発明の第3の発明によれば、第1の発明において、第3種換気方法で換気するときは、給気ファンを停止し、三路経路切り替えバルブを前記第1の給気経路から前記第2の給気経路に切り替え、外気を床下空間に自然給気した後、床下空間を経由後、室内へ給気し、室内空気を各室内に接続された排気ダクトを経て床下設置のチャンバーに集約した後、排気ファンで前記全熱交換素子に導入せず、チャンバー接続ダクトから直接屋外に排出するか、室内空気を前記全熱交換素子に導入しても、給気と排気との熱交換を行わずに、屋外に排出することを特徴とする省エネルギー換気システムが提供される。   According to the third aspect of the present invention, in the first aspect, when the third type ventilation method is used for ventilation, the air supply fan is stopped and the three-way path switching valve is set to the first air supply path. Switch to the second air supply path, and after the outside air is naturally supplied to the underfloor space, the air is supplied to the room after passing through the underfloor space, and the indoor air is installed under the floor via an exhaust duct connected to each room. After being collected in the chamber, it is not introduced into the total heat exchange element with an exhaust fan, but it is discharged directly from the chamber connection duct to the outdoors or even when indoor air is introduced into the total heat exchange element, There is provided an energy saving ventilation system characterized in that it is discharged outdoors without performing heat exchange.

また、本発明の第4の発明によれば、第1の発明において、外気温と室内温度とを測定し、外気温が25℃以上でかつ室内温度より高い場合は、外気を前記第1の給気経路から全熱交換素子を経て床下に給気する全熱交換型第1種換気方法を採用し、一方、外気温が室内温度よりも低い場合には、外気を前記第2の給気経路から全熱交換素子を経ないで床下に自然給気する第3種換気方法を採用することを特徴とする省エネルギー換気システムが提供される。   According to the fourth invention of the present invention, in the first invention, the outside air temperature and the room temperature are measured. When the outside air temperature is 25 ° C. or higher and higher than the room temperature, the outside air is A total heat exchange type 1 type ventilation method is employed in which air is supplied from the air supply path to the floor through the total heat exchange element. On the other hand, when the outside air temperature is lower than the room temperature, the outside air is supplied to the second air supply. There is provided an energy saving ventilation system that employs a third type ventilation method that naturally supplies air under the floor without passing through a total heat exchange element.

また、本発明の第5の発明によれば、第1の発明において、前記排気経路は、全熱交換素子の下流側に、臭気が強い部位からの排気導入口を備え、臭気が強い排気を全熱交換素子に導入せずに外部に排出することを特徴とする省エネルギー換気システムが提供される。   According to a fifth aspect of the present invention, in the first aspect, the exhaust path includes an exhaust inlet from a site with strong odor on the downstream side of the total heat exchange element, and exhaust with strong odor. There is provided an energy saving ventilation system characterized in that it is discharged outside without being introduced into a total heat exchange element.

本発明の省エネルギー換気システムは、家屋内に供給する空気の相対湿度を効率的に調整できるため、夏季においては床下空間の環境を改善するとともに冷房費用を節減することができ、また冬季においては暖房費用の節減と室内の過乾燥を防止することができ、その省エネルギー効果は極めて大きい。 従来、高気密高断熱の住宅では、室内温度は外気温よりも必ず高く、数℃から20℃程度高く、外気温が好適温度でも室内は好適温度よりも高くなるような状態で全熱交換型第1種換気方法で換気を継続すると、室内温度はより高くなり、室内温度は快適性環境を越える状態になるが、本発明により、外気温が好適で室内温度が外気温を超えた状況で非全熱交換型第3種換気方法を採用することで、室内の快適性を継続でき、換気の送風のために消費する電力量を半減することができる。   Since the energy-saving ventilation system of the present invention can efficiently adjust the relative humidity of the air supplied to the house, it can improve the environment of the underfloor space in summer and can reduce the cooling cost, and can also be heated in winter. Cost saving and indoor overdrying can be prevented, and the energy saving effect is extremely large. Conventionally, in a highly airtight and highly insulated house, the room temperature is always higher than the outside air temperature, and is about several to 20 degrees Celsius, and even if the outside air temperature is a suitable temperature, the room temperature is higher than the preferred temperature. If ventilation is continued with the first type ventilation method, the room temperature becomes higher and the room temperature exceeds the comfort environment. However, according to the present invention, the outside air temperature is suitable and the room temperature exceeds the outside air temperature. By adopting the non-total heat exchange type third ventilation method, indoor comfort can be continued, and the amount of power consumed for ventilation ventilation can be halved.

本発明の省エネルギー換気システムの一例を示す図である。It is a figure which shows an example of the energy saving ventilation system of this invention. 本発明の省エネルギー換気システムで使用される熱交換器の一例を示す図である。It is a figure which shows an example of the heat exchanger used with the energy saving ventilation system of this invention.

以下、本発明の省エネルギー換気システム(以下、単に換気システムともいう)につき図面を用いて詳細に説明する。 高気密高断熱の戸建住宅の換気方法としては主に、給気と排気との両方を機械的に行う熱交換型の第1種換気方法か、または給気は自然で行い、排気を機械的に行う非熱交換型の第3種換気方法とが用いられている。通常第1種換気方法の場合には給気と排気とで熱交換を行う熱交換型が用いられる。 本発明の換気システムは、外気を家屋内に導入する給気経路と、家屋内の各室内の空気を屋外へ排出する排気経路とを備える基礎断熱工法による高気密高断熱住宅の換気システムであって、前記給気経路として、まず外気を床下空間に自然または機械的に給気した後、床下空間を経路として室内に給気し、前記排気経路としては家屋内の各室内に接続されたダクトを床下設置のチャンバーに集約してから室内空気を機械的に屋外に排気する。 本発明の換気システムでは、図1に示すように、外気給気パイプ3、三路切り替えバルブ4、熱交換器素子5を装着した熱交換器5、給気ファン7、ダクト11、床下空間8に設置したチャンバー12、排気ファン13、排気用パイプ14などの部品から構成されている。   Hereinafter, the energy saving ventilation system of the present invention (hereinafter also simply referred to as a ventilation system) will be described in detail with reference to the drawings. As a ventilation method for a highly airtight and highly insulated detached house, it is mainly a heat exchange type 1 ventilation method that mechanically performs both supply and exhaust, or supply is natural and exhaust is performed mechanically. And non-heat exchange type 3 type ventilation method which is performed automatically. Usually, in the case of the first type ventilation method, a heat exchange type that performs heat exchange between supply air and exhaust is used. The ventilation system of the present invention is a ventilation system for a highly airtight and highly insulated house by a basic heat insulation method having an air supply path for introducing outside air into a house and an exhaust path for discharging air in each room of the house to the outside. As the air supply path, first, outside air is naturally or mechanically supplied to the underfloor space, and then the room is supplied with the underfloor space as a path, and the exhaust path is a duct connected to each room in the house. Are collected in a chamber under the floor, and the indoor air is mechanically exhausted to the outside. In the ventilation system of the present invention, as shown in FIG. 1, an outside air supply pipe 3, a three-way switching valve 4, a heat exchanger 5 equipped with a heat exchanger element 5, an air supply fan 7, a duct 11, and an underfloor space 8. It is comprised from components, such as the chamber 12, the exhaust fan 13, and the exhaust pipe 14 which were installed in this.

本発明において、外気給気パイプ3は、2系統あり、一つは一端が屋外にあり他端が床下空間に開放して、第1の給気経路を形成し、もう一つは、一端が屋外にあり他端が熱交換器5の側壁に接続して、第2の給気経路を形成している。第1の給気経路と第2の給気経路との連結部は、T字状でもY字状でも構わない。また、排気用パイプ14は、一端が熱交換器5の側壁に接続し、他端が屋外にある。 本発明において、三路切り替えバルブ4は、第1の給気経路を形成する外気給気パイプ3と第2の給気経路を形成する外気給気パイプ3を連結しており、熱交換型の第1種換気方法か、非熱交換型の第3種換気方法を切り替えるという、重要な機能を有するものである。バルブの種類は、特に制限されないが、例えば、流路可変シャッター方式やボールバルブ方式などを使用することができる。このうち好ましいのは流路可変シャッター方式のババルブである。バルブの開閉は、手動でもよいが、外気温度と室温の計測値を演算装置に伝送し、その電気信号で自動操作できるものが好ましい。   In the present invention, the outside air supply pipe 3 has two systems, one end is outdoors and the other end is open to the underfloor space to form a first supply path, and the other is one end. The other end is outdoors and the other end is connected to the side wall of the heat exchanger 5 to form a second air supply path. The connecting portion between the first air supply path and the second air supply path may be T-shaped or Y-shaped. The exhaust pipe 14 has one end connected to the side wall of the heat exchanger 5 and the other end outdoors. In the present invention, the three-way switching valve 4 connects the outside air supply pipe 3 that forms the first supply path and the outside air supply pipe 3 that forms the second supply path, and is a heat exchange type. It has an important function of switching between the first type ventilation method or the non-heat exchange type third type ventilation method. The type of the valve is not particularly limited, and for example, a flow path variable shutter system or a ball valve system can be used. Of these, the variable valve shutter type valve is preferred. The valve can be opened and closed manually, but it is preferable that the measured values of the outside air temperature and room temperature be transmitted to the arithmetic unit and automatically operated by the electric signal.

給気ファンおよび排気ファンは、熱交換素子の上流側または下流側のいずれかに設置され、全熱交換素子が収納された全熱交換器に直結またはダクトを介して接続される。これらの給気ファンや排気ファンは、床下空間に収納するのが騒音対策上効果的である。送風能力は特に制限されないが、給気ファンでは、最大300立方メートル/h、排気ファンでは最大400立方メートル/hとすることができ、いずれも風速調整ツマミで多段階に風量調整できるものが好ましい。   The air supply fan and the exhaust fan are installed either on the upstream side or the downstream side of the heat exchange element, and are directly connected to or connected to the total heat exchanger in which the total heat exchange element is stored via a duct. These air supply fans and exhaust fans are effectively housed in an underfloor space for noise countermeasures. The air blowing capacity is not particularly limited, but it can be a maximum of 300 cubic meters / h for an air supply fan and a maximum of 400 cubic meters / h for an exhaust fan, and any one that can adjust the air volume in multiple stages with a wind speed adjusting knob is preferable.

熱交換器の一例を図2に示す。角筒状の箱型形状であり、床下に設置できるように、例えば、横、縦がそれぞれ200〜600mm、高さが100〜400mmとする。熱交換素子は、熱交換器の内部に設置され、熱交換器のサイズよりも小さいものが採用される。熱交換器のケースサイズが、横、縦、高さそれぞれ400mm、400mm、250mmとしたときに、当該熱交換ケース内部に断熱材を装着して、それに装填される熱全熱交換型素子は横、縦、高さがそれぞれ300mm、300mm、200mmとすることができる。    An example of the heat exchanger is shown in FIG. For example, the horizontal and vertical sides are 200 to 600 mm, and the height is 100 to 400 mm so that the box is shaped like a rectangular tube and can be installed under the floor. A heat exchange element is installed in the inside of a heat exchanger, and the thing smaller than the size of a heat exchanger is employ | adopted. When the heat exchanger case size is 400 mm, 400 mm, and 250 mm respectively in the horizontal, vertical, and height directions, a heat insulating material is attached inside the heat exchange case, and the heat total heat exchange type element loaded in the heat exchange case is horizontal. The length and height can be 300 mm, 300 mm, and 200 mm, respectively.

本発明における全熱交換素子は、顕熱と潜熱の両方を交換する機能を有する。梅雨時や夏季の高温多湿で室内を空調設備で除湿や冷房運転を行う場合には、本発明の省エネルギー換気システムは、高湿の外気から前記全熱交素子で水蒸気を回収して低湿度の空気として床下空間に給気するので、床下での湿度を低下させるとともに、この湿度の低下した空気を室内に給気するので空調設備の除湿量が軽減され、省エネルギー運転となる。また前記全熱交換素子では顕熱も回収するので、高い外気温を下げて床下に給気する。更に床下では地中熱で冷やされるので、換気空気の温度を低下させるための消費電力は少なくなり、空調設備の運転は省エネルギーの運転となる。熱交換素子の面風速は、材料やサイズによっても異なるので一概に規定できないが、0.5〜2m/sとし、顕熱交換率70%以上、潜熱交換率30%以上とすることが望ましい。   The total heat exchange element in the present invention has a function of exchanging both sensible heat and latent heat. When the room is dehumidified or air-conditioned with high temperature and humidity during the rainy season or summer, the energy-saving ventilation system of the present invention collects water vapor from the high-humidity outside air with the total heat exchanger element to reduce the humidity. Since air is supplied to the underfloor space as air, the humidity under the floor is reduced, and the air with reduced humidity is supplied into the room, so that the amount of dehumidification of the air conditioning equipment is reduced and energy saving operation is achieved. In addition, since the total heat exchange element also collects sensible heat, the high outside air temperature is lowered and air is supplied under the floor. Furthermore, since it is cooled by underground heat under the floor, power consumption for lowering the temperature of the ventilation air is reduced, and the operation of the air conditioning equipment is an energy saving operation. Although the surface wind speed of the heat exchange element varies depending on the material and size and cannot be defined unconditionally, it is preferably 0.5 to 2 m / s, a sensible heat exchange rate of 70% or more, and a latent heat exchange rate of 30% or more.

本発明に用いる全熱交換素子の材料は、セルロース紙やプラスチックス製の不織布、または微細多孔膜がある。上記プラスチックスは特に限定されるものではなく、ポリエチレン、ポリプロピレン、ポリブテン等のポリオレフィン系プラスチックス、ポリスチレン等の芳香族系プラスチックス、ポリ塩化ビニール系プラスチックス、ポリエステル系プラスチックス、ポリビニールアルコール等の親水性プラスチックス又はこれらの混合系から選ばれる少なくとも1種が用いられる。またこれらの紙、プラスチックス製の不織布や微細多孔膜の表面を親水性プラスチックスで処理したものが用いられる。   The material for the total heat exchange element used in the present invention includes cellulose paper, a nonwoven fabric made of plastics, or a microporous film. The plastics are not particularly limited, and polyolefin plastics such as polyethylene, polypropylene and polybutene, aromatic plastics such as polystyrene, polyvinyl chloride plastics, polyester plastics, polyvinyl alcohol, etc. At least one selected from hydrophilic plastics or a mixed system thereof is used. In addition, those obtained by treating the surface of these papers, plastic nonwoven fabrics or microporous membranes with hydrophilic plastics are used.

本発明において、床下設置のチャンバーとは、排気を一時的に貯留するための容器であり、十分な容積を有するものが好ましい。木材や金属、セラミックなど剛性の材料を用いたものの他、プラスチック製の柔軟性がある材料を用いたものも使用できる。   In the present invention, the underfloor chamber is a container for temporarily storing exhaust gas, and preferably has a sufficient volume. In addition to materials using rigid materials such as wood, metal, and ceramic, materials using plastic flexible materials can also be used.

次に、本発明の省エネルギー換気システムの特徴を具体的に説明する。(1)本発明の省エネルギー換気システムの第1の特徴は、熱交換型の第1種換気方法と非熱交換型の第3種換気方法とを切り替え運転できることである。   Next, the features of the energy saving ventilation system of the present invention will be specifically described. (1) The first feature of the energy-saving ventilation system of the present invention is that the heat exchange type first type ventilation method and the non-heat exchange type third type ventilation method can be switched and operated.

まず、熱交換型の第1種換気方法としては、給気経路は外気を給気ファンで熱交換器に導入した後、床下空間に放出し、床下空間を経由した後、屋内に給気し、排気経路は室内空気を各室内に接続された排気ダクトを経て床下設置のチャンバーに集約した後、前記熱交換器に導入し、排気ファンで屋外に排出する。前記熱交換器に給気と排気を導入し熱交換を行う。一方、非熱交換型の第3種換気方法としては、前記給気ファンの運転を停止し、給気経路の外気導入口と前記熱交換器との間に設けられた三路経路切り替えバルブによって、外気を熱交換器に導入しないで、床下空間に放出する方向に切り替える。排気経路は前記熱交換型の第1種換気方法と同じ方法で行う。これによって排気は機械的に行い、外気を自然給気で床下空間に給気することができ、給気は自然給気で、排気は機械的の非熱交換型の第3種換気方法とすることができる。   First, as a heat exchange type 1 ventilation method, after the outside air is introduced into the heat exchanger with an air supply fan, it is discharged to the underfloor space, and then supplied indoors after passing through the underfloor space. The exhaust path collects room air through an exhaust duct connected to each room into a chamber installed under the floor, and then introduces the air into the heat exchanger and discharges it outdoors with an exhaust fan. Supply and exhaust air are introduced into the heat exchanger to perform heat exchange. On the other hand, as a non-heat exchange type third type ventilation method, the operation of the air supply fan is stopped, and a three-way path switching valve provided between the outside air inlet of the air supply path and the heat exchanger is used. Without switching the outside air into the heat exchanger, the direction is switched to the direction of releasing into the underfloor space. The exhaust path is performed by the same method as the heat exchange type 1 type ventilation method. As a result, exhaust is mechanically performed, and outside air can be supplied to the underfloor space with natural air supply. The air supply is natural air supply, and the exhaust is a mechanical non-heat exchange type third ventilation method. be able to.

即ち本発明の換気システムは、前記三路切り替えバルブにより、給気用ファンの運転を切り替えすることで、熱交換型の第1種換気方法と非熱交換型の第3種換気方法とを切り替えすることができる換気システムである。 図1において、外気1を外気導入口2から外気給気パイプ3を通じて三路切り替えバルブ4を経て、熱交換器5に装着された熱交換素子6に導入した後、給気ファン7で床下空間8に給気するか、または前記三路切り替えバルブ4から直接床下空間8に給気し、その後、床下空気を経て室内への給気用開口9から室内に循環させる。この操作を三路切り替えバルブ3で行なうのである。 一方、各室内の空気を排気用開口11からダクト12を経由して床下空間8にあるチャンバー13に集約した後、熱交換素子6に導入し、これに継設された排気ファン14によって排気用パイプ15を通じて屋外に排気する。なお床下空気を給気用開口から室内に循環させる代わりに、床下空間から壁内空間をへて室内に給気することも可能である。   That is, the ventilation system of the present invention switches between the heat exchange type first ventilation method and the non-heat exchange type third ventilation method by switching the operation of the air supply fan by the three-way switching valve. Is a ventilation system that can do. In FIG. 1, after introducing the outside air 1 from the outside air inlet 2 through the outside air supply pipe 3 through the three-way switching valve 4 to the heat exchange element 6 mounted on the heat exchanger 5, the underfloor space is supplied by the air supply fan 7. 8 is supplied to the underfloor space 8 directly from the three-way switching valve 4, and then circulated into the room from the air supply opening 9 through the underfloor air. This operation is performed by the three-way switching valve 3. On the other hand, after the air in each room is collected from the exhaust opening 11 into the chamber 13 in the underfloor space 8 via the duct 12, it is introduced into the heat exchange element 6 and exhausted by the exhaust fan 14 connected thereto. Exhaust outside through pipe 15. Instead of circulating the underfloor air from the air supply opening into the room, it is also possible to supply the air into the room from the underfloor space through the wall space.

(2)本発明の省エネルギー換気システムの第2の特徴は、空調設備で冷房運転をする期間中、外気温と室内温度とを測定し、外気温が室内温度よりも高い場合には全熱交換型の第1種換気システムを採用し、冷房運転の省エネルギー化を図るが、外気温が室内温度よりも低い場合には外気と室内排気との熱交換を行わないで、室温よりも温度の低い外気を直接取り入れる非熱交換型の第3種換気方法を採用することである。 (2) The second feature of the energy saving ventilation system of the present invention is that the outside air temperature and the room temperature are measured during the cooling operation by the air conditioning equipment, and the total heat exchange is performed when the outside air temperature is higher than the room temperature. A type 1 ventilation system is used to save energy in the cooling operation, but when the outside air temperature is lower than the room temperature, heat exchange between the outside air and the room exhaust is not performed, and the temperature is lower than the room temperature. The third type of ventilation method is a non-heat exchange type that directly takes in outside air.

これによって給気ファンの運転を停止することでファン運転に消費電力を節減できるし、冷房負荷も低減できる。夏季では日中の外気温は室温よりも高いが、夕刻から翌朝方までの外気温は室温よりも低い。即ち室温は外気温よりも高くなる。 この理由は、日中の外気は日射熱で高温になるが、室内は日射遮蔽効果と夜間に冷やされた室内の冷蓄熱効果のために外気温よりも低い。しかし太陽が西に沈む夕刻からは外気は急激に温度が低下するが、室内温度は温度の低下が少ない。室内では居住者自身からの放熱があることと、照明器具や家電機器からの放熱があることによる。また日中の日射取得熱で室内には蓄熱があるので、夕刻から翌朝方までの室内温度は外気よりも高くなる。このように室内温度が外気温よりも高い場合には熱交換型第1種換気システムよりも、非熱交換型の第3種換気システムを採用し、室内温度よりも温度の低い外気をそのまま室内に給気するほうが室内環境の改善に好適となる。   Accordingly, by stopping the operation of the air supply fan, power consumption can be saved in the fan operation, and the cooling load can be reduced. In the summer, the outdoor temperature during the day is higher than room temperature, but the outdoor temperature from evening until the next morning is lower than room temperature. That is, the room temperature is higher than the outside temperature. The reason for this is that the outside air during the day becomes hot due to solar heat, but the room is lower than the outside air temperature due to the sun shielding effect and the cold heat storage effect in the room cooled at night. However, the temperature of the outside air suddenly decreases from the evening when the sun sets west, but the temperature of the room temperature does not decrease much. This is due to the fact that there is heat dissipation from the occupants themselves, and that there is heat dissipation from lighting equipment and home appliances. Moreover, since there is heat storage in the room due to the heat acquired by solar radiation during the daytime, the room temperature from the evening to the next morning becomes higher than the outside air. Thus, when the room temperature is higher than the outside air temperature, a non-heat exchange type 3 ventilation system is adopted rather than the heat exchange type 1 ventilation system, and the outside air having a temperature lower than the room temperature is directly taken into the room. It is preferable to supply air to the indoor environment.

夏季において、高温多湿のため床下空間の空気は相対湿度即ち水蒸気濃度が高い。一方室内は冷房空調設備の運転によって温度が下げられるとともに、必然的に起こる除湿機能によって相対湿度、即ち室内空気中の水蒸気濃度は低くなる。したがって、本発明の換気システムにおいては、夏季における冷房空調設備の運転時においては、全熱交換素子部において、高濃度水蒸気の外気と低濃度水蒸気の排気との水蒸気移動で外気から排気側に水蒸気が移動することによって、外気の湿度が低下する。この湿度が低下した外気が床下空間に供給されることによって、床下の相対湿度が低下することによって、床下の環境が改善される。   In summer, the air in the underfloor space has high relative humidity, that is, water vapor concentration due to high temperature and humidity. On the other hand, the temperature of the room is lowered by the operation of the cooling air-conditioning equipment, and the relative humidity, that is, the water vapor concentration in the room air is lowered by the dehumidification function that occurs inevitably. Therefore, in the ventilation system of the present invention, during the operation of the cooling air-conditioning equipment in the summer, in the total heat exchange element section, the steam is transferred from the outside air to the exhaust side by the water vapor transfer between the high concentration water vapor and the low concentration water vapor. The humidity of the outside air decreases due to the movement. By supplying the outside air with reduced humidity to the underfloor space, the underfloor environment is improved by reducing the relative humidity under the floor.

冬季においては、外部から床下空間へ導入される空気は低温で低湿である。一方、室内は暖房による温度の上昇とともに、炊事、浴室及びその他の日常活動によって排出される水蒸気によって室内湿度も高くなる。本発明の換気システムにおいては、上記全熱交換素子部において、低温で低湿の外気と高温で高湿の室内空気との間で、顕熱交換とともに潜熱交換即ち水蒸気交換も起こる。これによって床下空間へ給気される外気は室内からの高温で高湿の排気で暖められるとともに湿度も高められる。したがって家屋内に給気される空気の温度及び湿度が高くなるので、省エネルギー暖房システムとして、冬季の暖房費の大幅な低減となるともに室内の過乾燥を防止することができる。   In winter, the air introduced into the underfloor space from the outside is low temperature and low humidity. On the other hand, as the temperature of the room rises due to heating, the room humidity increases due to water vapor discharged by cooking, bathrooms and other daily activities. In the ventilation system of the present invention, in the total heat exchange element section, latent heat exchange, that is, water vapor exchange also occurs between sensible heat exchange and low temperature and low humidity outside air and high temperature and high humidity indoor air. As a result, the outside air supplied to the underfloor space is warmed by the high-temperature and high-humidity exhaust from the room and the humidity is increased. Therefore, since the temperature and humidity of the air supplied into the house increase, the energy saving heating system can greatly reduce the heating cost in winter and prevent over-drying in the room.

本発明は、冬季や夏季で空調設備による冷暖房運転が必要な時期は熱交換型第1種換気システムを採用し、春や秋の空調設備の冷暖房運転が不要な中間期には非熱交換型の第3種換気方法を採用するシステムである。 すなわち本発明は、夏季の冷房季や冬季の暖房季には家屋内に供給する外気と室内からの排気との間で顕熱と潜熱との両方を交換することにより、室内に供給する空気の温度と湿度を効率的に調整し、夏季においては冷房費用を節減するとともに床下空間の環境を改善することができ、また冬季においては暖房費用を節減するとともに室内の過乾燥を防止することができる。 The present invention adopts a heat exchange type 1 ventilation system in the winter and summer seasons when air conditioning operation is required by the air conditioning equipment, and non-heat exchange type in the intermediate period when the air conditioning equipment in spring or autumn is not required. This is a system that employs the third type of ventilation method. That is, according to the present invention, in the cooling season in summer and in the heating season in winter, the sensible heat and latent heat are exchanged between the outside air supplied to the house and the exhaust from the room, thereby The temperature and humidity can be adjusted efficiently to reduce cooling costs and improve the underfloor environment in the summer, and to reduce heating costs and prevent indoor overdrying in the winter. .

これに対して、春や秋の中間季には、冷暖房設備の運転は不要なので、外気を床下に自然給気する第3種換気方法を行い、第1種換気方法で消費する給気用送風エネルギーを省略した省エネルギー換気システムとする。特に断熱性能が高い住宅では人や家電製品からの自然発熱や昼間の日射取得熱によって、室温は外気温よりも高くなり、国土交通省の断熱性能基準で次世代省エネルギー適合基準となる住宅では、室温は外気温よりも7〜10℃程度高くなり、より高性能の断熱住宅では20℃程度高くなる。従って春や秋の冷房不要の快適な気候下でも、室内温度は冷房運転を欲するほどまで高くなることがある。このような場合に全熱交換換気を行うと、新鮮空気の温度は外気温よりも高くなって室内に給気されるので、このような気候下では、給気を自然給気によって行う第3種換気方法であれば外気温のまま室内に給気されるので室内温度上昇の防止となり好ましい。また夏季には昼間の日射取得熱で、住宅が温められており、外気温が低下する夜間においても冷房設備を運転しない住宅の室内では自然発熱の影響もあり、室温は外気温よりも高いまま維持されることがある。このような場合に熱交換換気方法を行うと、室内へ給気される新鮮空気の温度は外気温よりも高くなり、室内の快適性が改善されない。外気が室温よりも高い場合には、外気を自然給気する第3種換気方法に切り替える換気方法を採用する。   On the other hand, in the middle season of spring and autumn, since air conditioning is not necessary, the third type ventilation method is used to naturally supply outside air under the floor, and the air supply air consumed by the first type ventilation method is used. The energy-saving ventilation system omits energy. Especially in houses with high thermal insulation performance, the room temperature is higher than the outside temperature due to natural heat from humans and home appliances and the heat acquired by daytime solar radiation, and in the house which is the next generation energy conservation conformity standard in the insulation performance standard of the Ministry of Land, Infrastructure, Transport and Tourism, The room temperature is about 7 to 10 ° C. higher than the outside temperature, and about 20 ° C. in a higher-performance insulated house. Therefore, even in a comfortable climate that does not require air conditioning in spring or autumn, the room temperature can be so high that cooling operation is desired. If total heat exchange ventilation is performed in such a case, the temperature of fresh air becomes higher than the outside air temperature and is supplied into the room. Therefore, in such a climate, the third air supply is performed by natural supply. If it is a seed ventilation method, since it will supply air indoors with external temperature, it will prevent the indoor temperature rise and is preferable. Also, in summer, the house is warmed by daytime solar heat, and the room temperature remains higher than the outside temperature due to the effect of natural heat generation in the interior of the house that does not operate the cooling system even at night when the outside temperature drops. May be maintained. When the heat exchange ventilation method is performed in such a case, the temperature of fresh air supplied into the room becomes higher than the outside air temperature, and the comfort in the room is not improved. When the outside air is higher than the room temperature, a ventilation method that switches to the third type ventilation method that naturally supplies outside air is adopted.

(3)本発明の省エネルギー換気システムの第3の特徴は、トイレなど臭いが強い部位からの排気は、ダクトで床下設置の前記チャンバーに集約した後、熱交換素子を経ないで直接外部に排気することである。 (3) The third feature of the energy saving ventilation system of the present invention is that exhaust from a strong smell site such as a toilet is exhausted directly to the outside without passing through a heat exchange element after being concentrated in the chamber installed under the floor with a duct. It is to be.

熱交換素子は、熱交換器内に装着されており、排気が熱交換素子の上流側から熱交換器に入り、熱交換素子の下流側から出ることになるが、熱交換器内では排気の一部が給気側に一部漏れる可能性がある。このために、トイレなど臭いが強い排気は、熱交換素子部の排気側に導入すると、給気中に臭いが循環することがあるので、熱交換器の熱交換素子の下流側にいれることにより、熱交換素子を経路しないで、直接外部に排出することにする。これによって臭いの強いトイレなどの排気も同じ換気システムで排気することができる。
以下に、本発明を実施例及び比較例によって、さらに詳細に説明するが、本発明はこれらの実施例及び比較例によってなんら限定されるものではない。
The heat exchange element is mounted in the heat exchanger, and the exhaust enters the heat exchanger from the upstream side of the heat exchange element and exits from the downstream side of the heat exchange element. Some may leak to the supply side. For this reason, exhausts with strong odors such as toilets may circulate in the supply air when they are introduced to the exhaust side of the heat exchange element, so by placing them on the downstream side of the heat exchange element of the heat exchanger The heat exchange element is discharged directly to the outside without passing through. As a result, exhaust from toilets with strong odors can be exhausted using the same ventilation system.
Hereinafter, the present invention will be described in more detail with reference to examples and comparative examples, but the present invention is not limited to these examples and comparative examples.

総2階建の建坪40坪の住宅に本発明の換気システムを適用した。前記住宅の気密度は、JIS A2201の方法により、相当隙間面積が0.8平方センチメートル/平方メートルであった。 ここで、室内からの空気の排気経路としては、家屋内のトイレ以外の6つの室の床に設置した室排気口から、直径100mmのアルミニウムフレキシブルダクトを床下空間に導き、床下空間に設置したチャンバーにて集約した後、直径150mmのアルミニウムフレキシブルダクトで全熱交換素子を装着した熱交換器の全熱交換素子の排気経路の上流側に接続し、全熱交換素子の下流側に接続された排気ファンで、直径150mmの断熱ダクトを経て外部に排出するものとした。1階および2階のトイレの排気は、トイレの床に設置した室排気口から直径75mmのアルミニウムフレキシブルダクトで床下設置の前記全熱交換器の全熱交換素子の排気経路下流側に接続した。 これに対して、給気経路としては、外気を給気ファンで全熱交換素子に導入せずに、床下空間に放出する部分を第1の給気経路とし、外気導入口から直径150mmの断熱ダクトで床下空間に設置した熱交換器の全熱交換素子の給気経路の上流側に接続し、同給気経路の全熱交換素子に接続する部分を第2の給気経路とし、熱交換器の下流側には床下に給気を放出するためのダクトを接続した。また、前記断熱ダクトの中間には、三路経路切り替えバルブを設置しているので、全熱交換型第1種換気方法を採用する場合は、外気を第1の給気経路により外気導入口から断熱ダクトを経て全熱交換器に導入し、また、非熱交換型第3種換気方法を採用する場合は、外気を第2の給気経路から外気導入口から断熱ダクトを経て床下空間へ導入できるようにした。   The ventilation system of the present invention was applied to a house with a total floor area of 40 tsubo. The air density of the house was 0.8 square centimeter / square meter with a corresponding gap area according to the method of JIS A2201. Here, as an air exhaust path from the room, an aluminum flexible duct having a diameter of 100 mm is led from the room exhaust port installed in the floor of six rooms other than the toilet in the house to the under floor space, and the chamber installed in the under floor space. After being collected in step 1, the exhaust pipe connected to the upstream side of the exhaust path of the total heat exchange element of the heat exchanger equipped with the total heat exchange element with an aluminum flexible duct having a diameter of 150 mm and connected to the downstream side of the total heat exchange element A fan was used to discharge to the outside through a heat insulating duct having a diameter of 150 mm. Exhaust air from the toilets on the first and second floors was connected to the downstream side of the exhaust path of the total heat exchange element of the total heat exchanger installed under the floor with an aluminum flexible duct having a diameter of 75 mm from a room exhaust port installed on the floor of the toilet. On the other hand, as the air supply path, the portion that discharges the outside air into the underfloor space without introducing it into the total heat exchange element with the air supply fan is used as the first air supply path, and heat insulation with a diameter of 150 mm from the outside air inlet Connected to the upstream side of the air supply path of the total heat exchange element of the heat exchanger installed in the underfloor space with a duct, and the part connected to the total heat exchange element of the same air supply path is the second air supply path, heat exchange A duct for discharging the supply air was connected to the downstream side of the vessel. Further, since a three-way path switching valve is installed in the middle of the heat insulation duct, when adopting the total heat exchange type 1 type ventilation method, the outside air is supplied from the outside air inlet through the first air supply path. Introduced into the total heat exchanger via the heat insulation duct, and when adopting the non-heat exchange type 3 ventilation method, the outside air is introduced from the second air supply path into the underfloor space via the heat insulation duct through the heat insulation duct. I was able to do it.

熱交換器ケースのサイズは、図2に示すように、横、縦、高さをそれぞれ400mm、400mm、250mmとした。熱交換素子は、全熱交換型素子であり、横、縦、高さがそれぞれ300mm、300mm、200mmであるようにした。熱交換素子の素材は、セルロース紙製で、微多孔には親水性高分子素材で処理されている。熱交換素子の面風速は1m/sの場合、顕熱交換率80%で潜熱交換率65%であった。給気ファンは最大300立方メートル/hで、風速調整ツマミで4段階に風量調整ができるようにした。排気ファンは最大400立方メートル/hで、風速調整ツマミで4段階に風量調整ができるようにした。 このように構成したので、家屋内に供給する空気の温度や相対湿度を効率的に調整することにより、夏季の冷房期においては床下空間の高湿環境を改善するとともに冷房費用を節減することができる。また冬季の暖房期においては、暖房費用を節減するとともに室内の過乾燥を防止するために、全熱交換型第1種換気システムで運転する。給気ファンおよび排気ファンにて外気と室内排気とを強制的に全熱交換素子に送風し、顕熱と潜熱を熱交換する。給気と排気の両方を送風するためにこの送風に要する消費電力は多いが、冷暖房エネルギーの消費を少なくすることができるので、省エネルギー換気方法となる。全熱交換素子を経て熱交換された外気は、床下空間に放出される。夏季の高温多湿の外気は、全熱交換素子による空調設備で、低温低湿に調整された室内排気とで顕熱と潜熱とを交換するので、床下空間へは低温で低湿の空気が放出され、床下空間の高湿状態は改善される。 冬季には低温低湿の外気は、高温高湿の室内空気とで顕熱と潜熱とが交換されるので、全熱交換素子を経て床下空間へは加温加湿された空気が放出され、床下空間をへて室内に給気される。しかし、春や秋など空調設備による冷暖房が不要な中間期には、冷暖房のエネルギー回収は不要なので、排気ファンの駆動だけで送風の消費電力が半減する第3種換気方法を採用するのが好ましい。また夏季の夜間など外気が室温よりも低く、外気と室内排気との熱交換が不要な時間帯や、外気が好適温度でも室内自然発熱や日射取得熱によって、室内温度が不快になるまで温度が上昇する場合には、外気と室内排気とを熱交換させないで好適温度の外気をそのままの温度で室内に自然給気する、送風エネルギーの消費電力が少ない第3種換気方法を採用する。   As shown in FIG. 2, the size of the heat exchanger case was 400 mm, 400 mm, and 250 mm in width, length, and height, respectively. The heat exchange element was a total heat exchange type element, and the width, length, and height were 300 mm, 300 mm, and 200 mm, respectively. The material of the heat exchange element is made of cellulose paper, and the microporous material is treated with a hydrophilic polymer material. When the surface wind speed of the heat exchange element was 1 m / s, the sensible heat exchange rate was 80% and the latent heat exchange rate was 65%. The air supply fan has a maximum of 300 cubic meters / h, and the air volume can be adjusted in four stages with the wind speed adjustment knob. The exhaust fan has a maximum speed of 400 cubic meters / h, and the air volume can be adjusted in four stages with the wind speed adjustment knob. With this configuration, by efficiently adjusting the temperature and relative humidity of the air supplied to the house, it is possible to improve the high-humidity environment in the underfloor space and reduce cooling costs during the summer cooling season. it can. In the winter heating period, the system is operated with a total heat exchange type 1 ventilation system in order to reduce heating costs and prevent indoor overdrying. The supply air and the exhaust fan forcibly send the outside air and the room exhaust to the total heat exchange element to exchange heat between sensible heat and latent heat. Although it consumes a large amount of electric power to blow both the supply air and the exhaust air, it can reduce the consumption of air-conditioning energy, thus providing an energy-saving ventilation method. The outside air heat-exchanged through the total heat exchange element is discharged into the underfloor space. The hot and humid outdoor air in the summer is air-conditioning equipment with a total heat exchange element, and sensible heat and latent heat are exchanged with room exhaust adjusted to low temperature and low humidity, so low temperature and low humidity air is released into the underfloor space, High humidity in the underfloor space is improved. In winter, low-temperature and low-humidity outdoor air exchanges sensible heat and latent heat with high-temperature and high-humidity indoor air, so heated and humidified air is released into the underfloor space via the total heat exchange element, and the underfloor space The air is supplied to the room through. However, in the middle period when air conditioning is not required, such as in spring and autumn, it is not necessary to recover the energy of the air conditioning. Therefore, it is preferable to adopt the third type ventilation method that reduces the power consumption of the blast by only driving the exhaust fan. . In addition, the temperature of the outdoor air is lower than room temperature, such as during the summer night, and the temperature does not need to be exchanged between the outdoor air and the indoor exhaust. When the temperature rises, the third type ventilation method is used in which the outside air at a suitable temperature is naturally supplied to the room at the same temperature without exchanging heat between the outside air and the room exhaust, and the power consumption of the blowing energy is low.

上記の換気システムで、排気ファンの風量は風量調節弁で240立方メートル/hに設定して運転した。給気ファンから床下への空気導入量は、給気ファンに設置の風量調節弁で220立方メートル/hに設定した。外気は温度5℃で相対湿度40%、室内は空調設備の運転で温度21℃、相対湿度50%であった。床下空間は18℃で相対湿度48%であった。全熱交換素子を経て、床下への給気温度は17℃であった。 次に、非熱交換型第3種換気方法を採用する場合は、三路経路切り替えバルブを手動操作して、外気を第2の給気経路により外気導入口から断熱ダクトを経て床下空間へ導入すると、外気の温度・湿度を保持したまま床下へ給気することができた。   In the above ventilation system, the air flow of the exhaust fan was set to 240 cubic meters / h with the air flow control valve. The amount of air introduced from the air supply fan to the bottom of the floor was set to 220 cubic meters / h by an air volume control valve installed in the air supply fan. The outside air had a temperature of 5 ° C. and a relative humidity of 40%, and the room was air-conditioning equipment operated at a temperature of 21 ° C. and a relative humidity of 50%. The underfloor space was 18 ° C. and 48% relative humidity. After passing through the total heat exchange element, the air supply temperature under the floor was 17 ° C. Next, when adopting the non-heat exchange type 3 ventilation method, the three-way path switching valve is manually operated, and the outside air is introduced into the underfloor space from the outside air inlet through the heat insulation duct through the second air supply path. Then, it was possible to supply air under the floor while maintaining the temperature and humidity of the outside air.

実施例1と同じ住宅で同じ換気システムを使用して、夏季での換気システムの運転を行った。そして外気温と室内に温度センサーを設けて、外気温が室内温度よりも高い場合は全熱交換型第1種換気方法が、また、外気温が室温度よりも低い場合には非熱交換型第3種換気方法が採用されるようにした。 午後2時では外気温33℃、相対湿度48%、室内温度27℃50%であった。外気温が室内温度よりも高いので、全熱交換型第1種換気方法で換気システムが運転された。全熱交換器から床下空間への給気温度は29℃、相対湿度50%であった。床下空間から1階への室給気口の温度は28℃であった。床下地中熱によって給気温度が下がったと推定される。午後8時に空調設備の運転を停止した。 午後10時には外気温26℃、室内温度は28℃であった。外気温が室内温度よりも低いので、非熱交換型第3種換気方法で換気システムは運転された。    The same ventilation system was used in the same house as in Example 1, and the ventilation system was operated in summer. And if the outside air temperature is higher than the room temperature, a total heat exchange type 1 ventilation method is used, and if the outside air temperature is lower than the room temperature, a non-heat exchange type is provided. The third type ventilation method was adopted. At 2 pm, the outside temperature was 33 ° C., the relative humidity was 48%, and the room temperature was 27 ° C. and 50%. Since the outside air temperature is higher than the room temperature, the ventilation system was operated by the total heat exchange type 1 ventilation method. The supply air temperature from the total heat exchanger to the underfloor space was 29 ° C. and the relative humidity was 50%. The temperature of the room air inlet from the underfloor space to the first floor was 28 ° C. It is presumed that the supply air temperature has dropped due to the heat in the floor ground. At 8pm, the air conditioner was shut down. At 10pm, the outside temperature was 26 ° C and the room temperature was 28 ° C. Since the outside air temperature was lower than the room temperature, the ventilation system was operated by the non-heat exchange type 3 ventilation method.

比較例1Comparative Example 1

実施例2と同じ換気システムを使用し、全熱交換型第1種換気方法で、三路経路切り替えバルブを固定し、切り替え操作することなく運転した。これは、従来の換気システムに相当する。 外気温26℃、室内温度30℃で全熱交換器から床下への給気温度は28℃で、実施例2よりも2℃高い温度で床下に給気された。これにより、実施例2に対して、エネルギー効率が悪化していることが分かる。    The same ventilation system as in Example 2 was used, and the three-way path switching valve was fixed and operated without switching operation by the total heat exchange type 1 ventilation method. This corresponds to a conventional ventilation system. The outside air temperature was 26 ° C., the room temperature was 30 ° C., the air supply temperature from the total heat exchanger to the under floor was 28 ° C., and the air was supplied under the floor at a temperature 2 ° C. higher than Example 2. Thereby, it turns out that energy efficiency is getting worse with respect to Example 2.

1 外気
2 外気導入口
3 外気給気パイプ
4 三路切り替えバルブ
5 熱交換器
6 熱交換素子
7 給気ファン
8 床下空間
9 給気用開口
10 壁内空間
11 排気用開口
12 ダクト
13 チャンバー
14 排気ファン
15 排気用パイプ
OA 給気入口
EA 排気出口
SA 給気出口
RA 室排気入口
1 open air
2 Outside air inlet
3 Outside air supply pipe
4 Three-way switching valve
5 Heat exchanger
6 Heat exchange element
7 Air supply fan
8 Underfloor space
9 Air supply opening
10 Wall space
11 Exhaust opening
12 Duct
13 chambers
14 Exhaust fan
15 Exhaust pipe
OA supply inlet
EA exhaust outlet
SA air supply outlet
RA room exhaust inlet

Claims (5)

外気を外気導入口から家屋内に導入する給気経路と、各室内の空気を屋外へ排出する排気経路とを備える住宅の換気システムにおいて、前記給気経路は、外気を給気ファンで全熱交換素子に導入した後、床下空間に放出し、床下空間を経由後、屋内に給気する第1の給気経路と、給気ファンを停止して外気を全熱交換素子に導入せずに、床下空間に放出する第2の給気経路からなり、一方、前記排気経路は、室内空気を各室内に接続された排気ダクトを経て床下設置のチャンバーに集約した後、排気ファンで前記全熱交換素子に導入し、給気と排気とで熱交換した後、又は熱交換せずに屋外に排出する経路から構成し、 かつ外気導入口から前記全熱交換素子との間の給気パイプに三路経路切り替えバルブを備え、外気を第1の給気経路に導入する全熱交換型第1種換気方法と、外気を第2の給気経路に導入する第3種換気方法とを前記三路経路切り替えバルブによって選択可能としたことを特徴とする省エネルギー換気システム。   In a residential ventilation system comprising an air supply path for introducing outside air into the house from the outside air inlet and an exhaust path for discharging the air in each room to the outside, the air supply path uses the air supply fan to completely heat the outside air. After being introduced into the exchange element, it is discharged into the underfloor space, and after passing through the underfloor space, the first air supply path for supplying air indoors and the supply fan are stopped and the outside air is not introduced into the total heat exchange element The second air supply path that discharges to the underfloor space, while the exhaust path collects the room air into the chamber installed under the floor through the exhaust duct connected to each room, and then the total heat is exhausted by the exhaust fan. After introducing heat into the exchange element and exchanging heat between the supply air and exhaust, or comprising a path that discharges to the outside without heat exchange, and from the outside air inlet to the supply pipe between the total heat exchange element Equipped with a three-way path switching valve to guide outside air to the first air supply path Energy saving ventilation system for the entire first type ventilation method the heat exchange, characterized in that a third kind ventilation method for introducing outside air into the second air supply path to be selected by the three-way path switching valve for. 全熱交換型第1種換気方法で換気するときは、前記第1の給気経路から外気を給気ファンで全熱交換素子に導入した後、床下空間に放出し、床下空間を経由後、屋内に給気し、室内空気を各室内に接続された排気ダクトを経て床下設置のチャンバーに集約した後、排気ファンで前記全熱交換素子に導入し、給気と排気とで熱交換した後、屋外に排出することを特徴とする請求項1に記載の省エネルギー換気システム。   When ventilating with the total heat exchange type 1 ventilation method, outside air is introduced from the first air supply path into the total heat exchange element with an air supply fan, then released into the underfloor space, and after passing through the underfloor space, After the air is supplied indoors, the indoor air is gathered into a chamber installed under the floor via an exhaust duct connected to each room, and then introduced into the total heat exchange element by an exhaust fan, and heat exchange is performed between the supply air and the exhaust. The energy saving ventilation system according to claim 1, wherein the energy saving ventilation system is discharged outdoors. 第3種換気方法で換気するときは、給気ファンを停止し、三路経路切り替えバルブを前記第1の給気経路から前記第2の給気経路に切り替え、外気を床下空間に自然給気した後、床下空間を経由後、室内へ給気し、室内空気を各室内に接続された排気ダクトを経て床下設置のチャンバーに集約した後、排気ファンで前記全熱交換素子に導入せず、チャンバー接続ダクトから直接屋外に排出するか、室内空気を前記全熱交換素子に導入しても、給気と排気との熱交換を行わずに、屋外に排出することを特徴とする請求項1に記載の省エネルギー換気システム。   When ventilating with the third type ventilation method, the air supply fan is stopped, the three-way path switching valve is switched from the first air supply path to the second air supply path, and the outside air is naturally supplied to the underfloor space. After passing through the underfloor space, the air is supplied to the room, and the room air is collected in the chamber under the floor via the exhaust duct connected to each room, and then introduced into the total heat exchange element with the exhaust fan, 2. Even if it exhausts directly to the outdoors from a chamber connection duct or it introduces indoor air into the total heat exchange element, it exhausts it outdoors without performing heat exchange between supply air and exhaust. Energy saving ventilation system as described in. 外気温と室内温度とを測定し、外気温が25℃以上でかつ室内温度より高い場合は、外気を前記第1の給気経路から全熱交換素子を経て床下に給気する全熱交換型第1種換気方法を採用し、一方、外気温が室内温度よりも低い場合には、外気を前記第2の給気経路から全熱交換素子を経ないで床下に自然給気する第3種換気方法を採用することを特徴とする請求項1に記載の省エネルギー換気システム。   A total heat exchange type in which the outside air temperature and the room temperature are measured, and when the outside air temperature is 25 ° C. or higher and higher than the room temperature, the outside air is supplied from the first air supply path to the floor through the total heat exchange element. When the first type ventilation method is adopted, and the outside air temperature is lower than the room temperature, the third kind is naturally supplied from the second air supply path under the floor without passing through the total heat exchange element. The energy saving ventilation system according to claim 1, wherein a ventilation method is adopted. 前記排気経路は、全熱交換素子の下流側に、臭気が強い部位からの排気導入口を備え、臭気が強い排気を全熱交換素子に導入せずに外部に排出することを特徴とする請求項1に記載の省エネルギー換気システム。 The exhaust path is provided with an exhaust introduction port from a portion having a strong odor on the downstream side of the total heat exchange element, and exhaust having a strong odor is discharged outside without being introduced into the total heat exchange element. Item 2. The energy saving ventilation system according to Item 1.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160036256A (en) * 2014-09-25 2016-04-04 주식회사 애니텍 Energy-saving type ventilation system
JP2017207276A (en) * 2017-08-28 2017-11-24 三菱電機株式会社 Heat exchange ventilation device
JP2019189115A (en) * 2018-04-27 2019-10-31 三菱電機株式会社 Vehicle heat exchanger
JP7041988B1 (en) * 2021-09-13 2022-03-25 株式会社から屋 Natural ventilation and forced ventilation combined building

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160036256A (en) * 2014-09-25 2016-04-04 주식회사 애니텍 Energy-saving type ventilation system
KR101661123B1 (en) * 2014-09-25 2016-09-29 주식회사 애니텍 Energy-saving type ventilation system
JP2017207276A (en) * 2017-08-28 2017-11-24 三菱電機株式会社 Heat exchange ventilation device
JP2019189115A (en) * 2018-04-27 2019-10-31 三菱電機株式会社 Vehicle heat exchanger
JP7041988B1 (en) * 2021-09-13 2022-03-25 株式会社から屋 Natural ventilation and forced ventilation combined building

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