JP2006029708A - Electric power saving type heat exchange ventilation system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric power saving type heat exchange ventilation system becoming a standard ventilation system in the next generation. <P>SOLUTION: A house ventilation system for exhausting air in a room outdoors and introducing outdoor air into the room is provided. A heat exchange element E is arranged under a floor F at the first story of a house or in a space Fs at the rear of a hut. A fan 1 for air supply and a fan 2 for exhaust are connected with the heat exchange element E to exhaust warm air Aw in the room forcedly through the element E by the fan 2 for exhaust and introduce outdoor cold air Ac into the room forcedly through the element E by the fan 1 for air supply. The element E is formed by stacking many sheets S made of nonwoven fabric. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a house ventilation system.

  Conventionally, air conditioning using the underfloor has been performed (for example, Patent Document 1).

JP-A-9-126492 (abstract)

It is desirable to introduce heat exchange ventilation equipment that can reduce the heat loss of ventilation in order to further reduce the heat loss of the housing with highly insulated housing and performance that greatly satisfies the next generation energy saving standards.
Heating energy can be reduced even with the introduction of current heat exchange ventilation equipment. However, the power consumption is large and the heating cost that can be reduced is canceled in increments of electricity bills.
Against this background, the present invention aims to develop a power-saving heat exchange ventilation system that will be the next generation standard ventilation system.

  The current heat exchange ventilation system has a mainstream configuration in which the main body is installed behind the ceiling of the sanitary, air is supplied to each room by a duct, and exhaust is sucked by a grill on the lower surface of the main body and discharged to the outside. The size of the main body has been reduced so that it can fit even in a low ceiling, and many cross flow type compact heat exchange elements (elements) inside the main body have been used. Therefore, the pressure loss is large. For these reasons, a sirocco fan with high power consumption that is resistant to pressure loss is employed, resulting in a ventilation system with a high running cost.

  The present invention proposes a technique that uses the underfloor space or the attic space of a basic heat-insulated house to reduce the power consumption and pressure loss of the heat exchange ventilation system.

In recent years, the number of houses with basic thermal insulation has increased mainly in Hokkaido and Tohoku, and underfloor heating has also become popular.
The advantage of using the underfloor space of a basic insulated house is that the underfloor space is wider than the ceiling of the first floor, the element and duct diameter can be increased, and the heating louver for the underfloor radiator is supplied to each room. The air supply duct can be omitted by using the entire space under the floor as an air supply chamber. As a result, pressure loss in the ventilation path can be reduced, and a propeller type fan with low power consumption can be adopted as a fan for supply and exhaust instead of a powerful sirocco fan, and a power saving system can be constructed.

  The heat exchange ventilation system using the underfloor space can effectively utilize the large underfloor space and the shed. Therefore, large elements are installed under the floor and behind the shed to reduce pressure loss and increase efficiency. The structure of the element is a type in which plates are stacked, and heat exchange is performed by warm air and cold air flowing in opposite directions between the plates. The material of the heat exchange part uses a moisture permeable windproof sheet, and moisture can also be collected. Moreover, the heat exchange part increases the surface area by raising it in a waveform.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1 (a), this system exhausts indoor air to the outside and introduces outdoor air into the room, and exchanges heat with the space Fs below the floor F on the first floor of the house. Element E is arranged.

  An air supply fan 1 and an exhaust fan 2 are connected to the heat exchange element E, and indoor warm air Aw is forcibly exhausted by the exhaust fan 2 through the heat exchange element E, and outdoor cool air Ac. Is forcibly introduced into the room through the heat exchange element E by the air supply fan 1.

  As shown in FIG. 2 (b), the heat exchange element E is formed by stacking a large number of moisture permeable sheets (for example, polyethylene nonwoven sheet) S made of a nonwoven fabric mainly composed of a thermoplastic resin. As shown in FIG. 3, narrow gaps serving as the air supply flow path 10 or the exhaust flow path 20 are alternately provided between the moisture permeable sheets S and S. Here, “multiple sheets” means at least several sheets (5 to 6 sheets), preferably 20 sheets or more.

  As shown in FIGS. 2A and 2B, each of the moisture permeable sheets S is molded into a predetermined shape. In the longitudinal direction Y and the lateral direction X of each of the moisture permeable sheets S, a large number of uneven portions 3 are arranged at regular pitches in a staggered manner. Note that at least several hundred to several thousand uneven portions 3 are formed per sheet.

  As shown in FIG. 1B, the top and bottom of the moisture permeable sheets S having the concavo-convex portions 3 arranged in a zigzag pattern are arranged one above the other with the pitch shifted by one pitch P. The concavo-convex portions 3, 3 of the moisture permeable sheets S, S adjacent to each other are overlapped so that the concavo-convex portions 3, 3 are in contact with the smooth portion 5 of the moisture permeable sheets S. Yes.

  The side surfaces 4 and 4 along the air flow direction in each sheet S in FIG. 2A are closed by a closing member so that the air does not escape. The sheets S may be joined to each other on both side surfaces 4 and 4 via a closing member, and the top of the uneven portion 3 and the smooth portion 5 may be joined to each other. The first and second collective branching means 11 and 21 in FIG. 3 are provided at both ends of each sheet S where air flows in and out.

  The first collective branching means 11 shown in FIG. 3 exhausts the warm air Aw discharged from the indoor through a first chamber (not shown) in a state where the warm air Aw is branched into the exhaust flow paths 20 and from the supply flow paths 10 indoors. The cold air Ac traveling toward the air is gathered in a second chamber (not shown) and supplied indoors.

  The second collecting / branching means 21 supplies the cold air Ac supplied from outside through a third chamber (not shown) in a state where it is branched to each supply flow path 10 and from each exhaust flow path 20 to the outside. Warm-up air Aw heading is gathered in a fourth chamber (not shown) and exhausted outdoors.

  The first and second collective branching means 11 and 21 can be formed by stacking substantially triangular plates at the same pitch as the sheet S and alternately closing the openings O on two sides of the triangle. .

In the above configuration, as shown in FIG. 1 (a), the warm air Aw flows into the exhaust flow path 20, but at this time, the meandering is repeated by the solid line uneven portion 3 bulging in the exhaust flow path 20. It flows while flowing along the broken irregularities 3 of the broken line. On the other hand, the cold air Ac flows in the air supply flow path 10, and at this time, similarly, the cold air flows while repeating meandering and undulations. Thus, the hot air Aw and the cold air Ac are heat-exchanged via the single sheet S. That is, the cold air Ac supplied to the room is warmed by the warm air Aw via the seat S.
According to such a configuration, the efficiency of heat exchange is significantly improved as compared with the conventional case.

  Further, when the cold air Ac has a high humidity, the sheet S has moisture permeability, so that the moisture of the cold air Ac is absorbed by the warm air Aw via the sheet S. On the other hand, when the cold air Ac is excessively dried, the moisture of the warm air Aw is absorbed by the cold air Ac via the sheet S. Therefore, it also helps to maintain moderate humidity.

  When such an element is used, the pressure loss is remarkably reduced and the power consumption of the fan is remarkably reduced, so that power saving can be achieved.

  In the above-described embodiment, the moisture permeable sheet made of a nonwoven fabric is exemplified as the sheet, but the sheet may be non-moisture permeable and does not necessarily need to be a nonwoven fabric. In addition, the cross-sectional shape of the passage formed by the sheet can be a honeycomb or a rectangular shape.

By the way, as shown in FIG. 4A, a duct may be used only for exhausting the warm air Aw. In such a case, the chamber is formed by sealing under the floor. The exhaust air of the warm air Aw passes through the duct and is guided to the outside through the heat exchange element E. On the other hand, the cold air Ac introduced into the heat exchange element E is introduced from the heat exchange element E into the room through a chamber under the floor.
Although not shown, conversely, a duct may be used only for intake. In this case, the warm air Aw passes through the chamber under the floor, is introduced into the heat exchange element E, and is exhausted. On the other hand, the cold air Ac introduced into the heat exchange element E is introduced into the room through the duct.

Furthermore, as shown in FIG.4 (b), you may provide this ventilation system in a hut back. In such a case, it is preferable to use roof insulation.
Alternatively, the chamber may be formed by completely extending the ceiling and sealing the back of the hut (the ceiling). In such a case, a duct may be used for only one of exhaust and intake, and a chamber in the back of the cabin may be used for the other.

Next, another example of the element will be described with reference to FIG.
FIG. 5A is a plan view of a sheet constituting the element, and FIG. 5B is a partial cross-sectional view of the sheet along the line Vb-Vb. In FIG. 5 (b), a part of any two sheets of a large number of stacked sheets is shown enlarged.

As shown in FIG. 5B, each sheet S has an upper surface Su and a lower surface Sd. Each sheet S has a first uneven portion 31 having a convex upper surface Su and a lower surface Sd convex. The 2nd uneven | corrugated | grooved part 32 which becomes is formed.
As shown in FIG. 5 (a), the first concavo-convex portions 31 and the second concavo-convex portions 32 are arranged in a staggered manner at regular pitches P in the vertical direction X and the horizontal direction Y, respectively. That is, in any one sheet S, the second uneven portions 32 are arranged on the left and right sides of the first uneven portion 31, and conversely, the first uneven portions 31 are arranged on the left and right sides of the second uneven portion 32. Is done.

As shown in FIG. 5B, among the upper and lower sheets S adjacent to each other, the second uneven portion 32 of the upper sheet S and the first uneven portion 31 of the lower sheet S are in contact with each other. . For this reason, the air flow is hindered at the contacted portion.
On the other hand, among the sheets S, S adjacent to each other, the first uneven portion 31 of the upper sheet S and the second uneven portion 32 of the lower sheet S are separated from each other and form a part of the flow path. . Further, both the sheets S are separated in a smooth or flat portion 33 other than the concavo-convex portions 31 and 32, and this portion forms a part of the flow path. Therefore, air flows through these separated portions.

  Here, as shown in FIG. 5A, since the first concavo-convex portions 31 and the second concavo-convex portions 32 are arranged in a staggered manner, when the sheets S are arranged one above the other, from the entrance of the element E Air Aw (Ac) toward the outlet flows while repeating meandering. Therefore, heat exchange can be performed efficiently.

  Further, as shown in FIG. 5 (b), since the second uneven portion 32 of the upper sheet S and the first uneven portion 31 of the lower sheet S are in contact with each other, the interval between the upper and lower sheets is maintained. Be drunk. Therefore, the distance h between the upper and lower sheets S, S can set the heights of the concavo-convex portions 31, 32 to ½h, respectively. Therefore, even if the height of the concavo-convex portion cannot be increased too much in manufacturing, the distance h between the sheets S and S can be set large, so that the pressure loss can be reduced.

  The present invention can be used mainly for ventilation in cold regions. It can also be used for ventilation in hot and humid areas. Furthermore, in addition to ventilation in ordinary houses, it can also be used for ventilation of buildings such as public facilities and warehouses.

(A) is sectional drawing which shows arrangement | positioning of the element of this invention, (b) is a top view which shows a part of element. (A) is a top view which shows a sheet | seat and an element, (b) is the same side view. It is a perspective view which shows the 1st and 2nd assembly branch means. It is sectional drawing which shows the other example of arrangement | positioning of an element. It is the expanded partial top view and partial sectional view which show the other example of a sheet | seat.

Explanation of symbols

1, 2: Fan 3: Uneven portion 10: Air supply channel 20: Exhaust channel 31: First uneven portion 32: Second uneven portion 33: Parts other than the uneven portion Ac: Cold air Aw: Warm air E: Heat Replacement element S: Sheet Us: Upper surface Ud: Lower surface

Claims (3)

A house ventilation system that exhausts indoor air to the outside and introduces outdoor air into the room,
A heat exchange element located under the floor of the house or behind the shed;
An exhaust passage provided in the heat exchange element and exhausting indoor air to the outside;
An air supply passage provided in the heat exchange element for introducing outdoor air into the room;
A ventilation fan forcing the introduction and discharge of the air,
The heat exchange element is formed by stacking a number of non-moisture permeable or moisture permeable sheets mainly composed of a thermoplastic resin,
Each of the sheets is molded into a predetermined shape,
A house ventilation system in which narrow gaps serving as the exhaust flow path or the air supply flow path are alternately provided between the seats so that the pressure loss in the flow path is reduced. In claim 1, in the longitudinal and lateral directions of each sheet, a large number of irregularities are arranged in a staggered pattern at a regular pitch,
By arranging the sheets with the staggered projections on the top and bottom with the phases shifted by 1 pitch for each sheet, the air flowing from the inlet to the outlet of the element repeats meandering. A house ventilation system in which each flow path is formed. In Claim 1, each said sheet | seat has an upper surface and a lower surface, and each said sheet | seat has the 1st uneven | corrugated | grooved part where the said upper surface becomes convex, and the 2nd uneven | corrugated | grooved part where the said lower surface becomes convex, respectively. Arranged in a staggered pattern at regular pitches in the direction and lateral direction,
Of the upper and lower sheets adjacent to each other, the second concavo-convex portion of the upper sheet and the first concavo-convex portion of the lower sheet are in contact with each other, the air flow is blocked at the contact portion, and they are adjacent to each other Of the upper and lower sheets, the first uneven portion of the upper sheet and the second uneven portion of the lower sheet are separated from each other, and are separated at portions other than the uneven portions, and thus the sheets are stacked one above the other. The house ventilation system in which each flow path is formed so that air from the inlet to the outlet of the element flows in a meandering manner.

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