JPH10197037A - Ventilating unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ventilating unit excellent, in adaptability and applicability to alteration of field conditions. SOLUTION: There are provided total heat exchanger 10 for heat exchanging exhaust in a house and supply air into the house, a first duct 14 having a length with which the total heat exchanger 10 and the outside of the house are connectable, and a second duct 15 having a length with which the total heat exchanger 10, and an exhaust grill 16 and an air supply grill 17 provided in the house. At least the second duct 15 is constructed as an expandable condensation prevention flexible duct.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation unit, and more particularly, to a ventilation unit in which a total heat exchanger for exchanging heat between indoor exhaust air and indoor air supply and a supply / exhaust grill are unitized.

[0002]

2. Description of the Related Art Fresh outdoor air required by humans causes a large load in terms of air conditioning especially in summer and winter. Therefore, heat is exchanged between exhaust air discharged from the inside of a building to the outside and air supplied to a room. This will save a lot of energy. For this reason, conventionally, a total heat exchanger called a stationary total heat exchanger, in which flat partition plates and corrugated spacing plates are alternately laminated to form an exhaust flow path and an air supply flow path, is used. It is used. With this total heat exchanger, both the sensible heat and the latent heat of the exhaust gas and the supply air can be exchanged, and as a result, air conditioning with low energy loss can be achieved.

Conventionally, such a total heat exchanger is mounted on a structure by mounting the total heat exchanger near the wall of the structure, and furthermore, by interposing a space between an exhaust grill and an air supply grill installed at predetermined positions in the room. , Connected by a spiral duct. The spiral duct is a round duct formed by rolling a strip-shaped iron plate into a spiral shape so as to form a joint at the joint.

[0004]

However, since the spiral duct is made of a steel plate and has little flexibility, it is necessary to connect the total heat exchanger installed near the wall of the structure to an exhaust grill or an air supply grill. It is almost impossible to connect only with a straight spiral duct, so it is necessary to use many parts, such as a T pipe for branching, a drop tube, and an elbow pipe for direction change. Was.

On the other hand, in place of the spiral duct having such a problem, a so-called flexible duct, which is lightweight and flexible, is used as a duct material in connection between a general air conditioner and an air supply grill. ing. The flexible duct is made of cloth, etc. stretched around the shape-retaining ring, and is excellent in lightness and flexibility as described above. Can be greatly improved.

The applicant of the present application has disclosed many air conditioning techniques using such a flexible duct in Japanese Utility Model Laid-Open No. 4-13647 and Japanese Utility Model Laid-Open No. 5-25238. However, while the flexible duct has the above advantages, it also has a disadvantage in that the processing of the connecting portion is troublesome.

[0007] In addition, in air-conditioning work in which the installation must be performed in a narrow space such as an attic, it is important to be able to perform the work in a shorter time and with higher accuracy. However, in the conventional method, only the bent portion of the duct is required. Instead, it required a great deal of time to connect with a heat exchanger and an air supply grill.

Further, when installing the ventilation device, the installation location of the total heat exchanger and the various grills largely depends on the conditions of the site, and the installation location planned in the initial design is changed. There are things.
In this case, even if a flexible duct is used as the duct material, there is a limit in responding to the change of the installation location, and as a result, the total heat exchanger and the air supply grille must be installed at unintended locations. Sometimes you have to.

In the case where the supply air which has been heat-exchanged by one total heat exchanger is branched into two or more places, the conventional method uses a single supply connection port provided in the total heat exchanger. A duct is connected, and a branching chamber is installed ahead of the duct, from which the branching is made to two or three air supply grilles, and a branching chamber for this is required.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems in the conventional ventilation system, and has as its first object to provide a ventilation unit excellent in adaptability to site conditions change and workability. It is a second object of the present invention to provide a ventilation unit capable of branching supply air that is not required.

[0011]

In order to achieve the above object, a ventilation unit of the present invention has a total heat exchanger for exchanging heat between indoor exhaust air and indoor air supply, and a structure of the total heat exchanger. At least a first duct having a length connectable to the outside of the object; and a second duct having a length connectable to the total heat exchanger and an exhaust grill and an air supply grill provided indoors, at least The second duct is a flexible duct with dew condensation prevention which can be freely expanded and contracted.

The change of the installation position due to the change of the site conditions is as follows.
It is mainly between the total heat exchanger and the exhaust grille and the air supply grille, which is mainly generated in the exhaust grille and the air supply grille, and where a modified pipe such as an elbow pipe is conventionally required. For this reason, in particular, a flexible duct that can expand and contract is used as the second duct that connects the total heat exchanger to the exhaust grill and the air supply grill. As the first duct connecting the total heat exchanger and the outside of the structure, a conventional spiral duct can be used, but it is preferable to use a flexible duct.

As a flexible duct suitable for such a condition, a flexible duct is used in which a shape-retaining ring is sandwiched between aluminum foils to form a bellows, and a pile of nylon or rayon is planted on the outer aluminum foil. be able to.
This not only eliminates the need for a heat insulating material for preventing dew condensation, but also makes it lightweight and can be expanded and contracted up to about 10 times, so that it is excellent in flexibility in each direction and the connection position is not limited. In addition, positioning alignment with respect to the connection position is facilitated, and workability is improved.

Further, the temperature difference between the inside and outside of the first duct connecting the total heat exchanger to the outside of the structure is determined by connecting the total heat exchanger to the exhaust grill and the air supply grill provided indoors. Since the first duct is larger than the second duct, the first duct does not generate condensation until the temperature difference reaches 18 degrees.
By providing a duct that can withstand a temperature difference of up to 13 degrees, a ventilation unit that is economical and has no functional hindrance can be provided.

[0015] A heat exchanger for temperature adjustment may be interposed between the total heat exchanger and the air supply grill. Thus, not only a simple ventilation unit but also an air conditioning unit having the above-described effects can be provided. As the heat exchanger for temperature adjustment, for example, a fan coil unit or a heat pump air conditioner can be used.

Various known structures can be used as the connection structure between the duct and the total heat exchanger, the exhaust grill and the air supply grill.
Japanese Patent Laid-Open Publication No. 6-64046 proposes a connection port provided with an elastic packing that can be attached simply by inserting a duct, or a state in which the tip of the duct is abutted against the duct connection port for a large diameter. And a bent piece that can be fixed with the above. As a result, it is possible to greatly reduce the connection labor as compared with a conventional product that required screwing and taping.

Further, the total heat exchanger may be provided with a plurality of supply connection ports and / or exhaust connection ports that can be connected to the second duct. With such a structure, it is possible to directly connect the total heat exchanger to a plurality of exhaust grills or air supply grills without passing through the branching chamber.

Here, by providing air flow distribution means capable of adjusting the air flow to a plurality of air supply connection ports provided in the total heat exchanger, a single total heat exchanger has different air flow rates. An appropriate amount of air can be supplied to the air grill.

As the air volume distribution means, a simple means which does not increase the cost is desirable. For example, a shielding plate provided in the flow path and having an adjustable inclination angle, or having a large number of through holes and relatively slidable. It is possible to employ a member composed of a plurality of plate members.

In addition, a switching means for stopping the supply of air to any of the plurality of air supply connection ports provided in the total heat exchanger can be provided. This makes it possible to select an appropriate connection port according to the installation location of the air supply grille, and to optimally connect the total heat exchanger and the air supply grille.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The features of the present invention will be described below in detail with reference to the embodiments shown in the drawings. Here, FIG. 1 is a perspective view showing an overall configuration of a ventilation unit according to an embodiment of the present invention, and FIG. 2 is a plan view of the ventilation unit shown in FIG.

Referring to FIG. 1, reference numeral 10 denotes a total heat exchanger;
Is an air supply grill provided on the indoor side, 12 is also an exhaust grill, 13 is a branching chamber, 16 is an exhaust grill provided on the outside of the room, 17 is also an air supply grill, and the total heat exchanger 10 and the exhaust gas are exhausted. First between the grill 16 and the air supply grill 17
Are connected by a duct 14. A second duct 15 is provided between the total heat exchanger 10 and the chamber 13 and the exhaust grill 12 and between the chamber 13 and the air supply grill 11.
Connected by

As shown in detail in FIG. 3, the total heat exchanger 10 has a rectangular housing 21, and two sets of total heat exchange elements 22 are detachably inserted at substantially the center of the housing. Further, on both sides of the total heat exchange element 22, an exhaust blower 23 and an air supply blower 24 are provided. Then, the exhaust blower 23 and the air supply blower 24
At the four corners of the housing 21, the air supply connection ports 25a and 25d and the air discharge connection ports 25b and 25c
Is provided. In the drawing, reference numeral 26 denotes a maintenance cover for replacing the total heat exchange element 22, and T denotes an inspection port provided on the structure. The inspection port T is opened, and the maintenance cover 26 is further opened to replace the total heat exchange element 22. I do.

With such a structure, the outside air is heat-exchanged by the total heat exchange element 22 while being sucked by the air supply blower 24, and moves in the direction indicated by the white arrow. On the other hand, the exhaust gas in the room is sucked by the exhaust blower 23, exchanges heat with the total heat exchange element 22, and moves in the direction of the solid arrow.

The air supply connection port 25a is provided with an elastic packing P having a diameter slightly smaller than the outer shape of the duct, thereby holding the ends of the ducts 14, 15 as shown in FIG. It can be attached simply by inserting it into the safety connection port 25a. In this structure, not only the air supply connection port 25a but also the air supply connection port 25d, the exhaust connection ports 25b and 25c, and further, the air supply grill 11, the exhaust grill 12, and the duct connection ports of the chamber 13 The same is true for The detailed structure is disclosed in Japanese Utility Model Laid-Open No. 6-64046 and the specification, which were disclosed by the present applicant.

The air supply grill 11 is an air outlet for introducing outside air into the room, has an open lower surface, and has a connection port for a second duct 15 on a side surface. The number of the exhaust grills 12 is smaller than that of the normal air supply grill 11, and is a suction port for discharging dirty air in the room to the outside. This exhaust grill 12
Also has a structure in which the lower surface is opened and a connection port for the second duct 15 is provided on the side surface.

The chamber 13 is a conventionally known one. In this embodiment, the chamber 13 has a structure in which two connection ports are provided on a surface facing the inflow port. Note that, as in the present embodiment, 2
The number of branches is not limited to the number of branches, and a connection port may be provided on the side surface of the inflow port.

The first duct 14 is a glass wool duct covered with a vinyl chloride film, more specifically, a non-woven fabric, a galvanized steel wire, glass wool, and a vinyl chloride film from the inside, and has elasticity and flexibility. ing. With this structure, temperature difference 18 degrees, relative humidity (RH)
Can be used up to 70%. In the present embodiment,
Although the first duct 14 is a flexible type, since the total heat exchanger 10 and the exhaust grill 16 and the air supply grill 17 provided on the outdoor side have many straight pipes, the conventional spiral duct is heat-insulated. Can also be used.

On the other hand, the second duct 15 is a simple dew proof (flocked)
This is an aluminum foil flexible duct composed of aluminum foil, galvanized steel wire, and planted aluminum foil from the inside. The duct 15 also has elasticity and flexibility, but can be used up to a temperature difference of 13 degrees and a relative humidity (RH) of 60%. Thus, the first duct 14 is connected to the second
The reason why the heat insulating property is superior to that of the duct 15 is that the temperature difference between the inside and the outside of the duct before the heat exchange in the total heat exchanger 10 is larger. This makes it possible to provide a ventilation unit that is economical and has no functional hindrance. In the case where the supply / exhaust temperatures are almost equal to each other as in the case of the ceiling urethane chamber system, the second duct 15 can omit the flocking.

As described above, in the ventilation unit according to the present embodiment, a deformed pipe such as an elbow pipe is not required, and the adaptability to the change of site conditions and the workability are excellent.

In addition, in addition to the above configuration, a heat exchanger for temperature adjustment can be interposed between the total heat exchanger 10 and the chamber 13. Thus, not only a simple ventilation unit but also an air conditioning unit having the above-described effects can be provided.

FIG. 5 shows the total heat exchanger 10, the chamber 13,
An embodiment showing another connection structure of the air supply / exhaust grills 11 and 12 and the ducts 14 and 15 is provided with a bending piece that can be fixed in a state where the tip of the duct is abutted with the duct connection port. In the figure, 28 is a fixture, 29 is a tubular body attached to the tips of the ducts 14 and 15, and a flange 29a is provided at the tip of the tubular body 29.
An elastic member 29b is attached to 9a.

The fixture 28 includes a fixing piece 28a, a rising piece 28b, and a bending piece 28c.
A cutout portion 28d is formed at the base end portion, and a taper portion 28e is formed at the bottom portion of the bent piece 28c.
With such a structure, the ducts 14 and 15 are attached by abutting the tubular body 29 at the tips of the ducts 14 and 15 against the wall surface of the total heat exchanger 10 and the like, and bending the bending piece 28c of the fixture 28 inward. Can be.

FIG. 6 shows an example of the construction of the heat exchanger 10. The pair of total heat exchangers 10 are arranged so that the supply and exhaust ports are opposite to each other with the inspection port T interposed therebetween. The maintenance covers 26 of both the total heat exchangers 10 are located on the inspection port T side. With such an arrangement, one inspection port T can be shared.

Next, another embodiment of a ventilation unit having a plurality of connection ports will be described with reference to FIGS. FIG. 7 is a plan view showing another embodiment of the ventilation unit, and FIG. 8 is an explanatory diagram showing an air volume distribution mechanism of the total heat exchanger shown in FIG. In the embodiments described below, those corresponding to the above embodiment are denoted by the same reference numerals and description thereof will be omitted.

As clearly shown in FIG. 8, in this embodiment, in addition to the air supply connection port 25a, a second air supply connection port 25a-1 is provided at a position 90 degrees from the air supply connection port 25a. Thereby, the air supply connection port 25a and the second air supply connection port 25
a-1 can be directly connected by the ducts 14 and 15, and the total heat exchanger can be directly connected to a plurality of exhaust grills or air supply grills without passing through a branching chamber as in the related art. It becomes possible.

Numeral 30 denotes an air volume distribution means provided in the flow path, and by operating the air volume distribution means, the air supply connection port 25a is provided.
In addition, the amount of air to be supplied to the second air supply connection port 25a-1 can be arbitrarily set. The air volume distribution means according to the present embodiment includes a damper 3 having one end mounted so that the inclination angle can be changed.
1. It is composed of a helical flexible wire 32 that supports the tip of the damper 31 and the like. The flexible wire 32 and the damper 31 are each threaded, and the handle 34 is inserted into a hexagonal hole 33 formed at the end of the flexible wire 32 and rotated to change the inclination angle of the damper 31 arbitrarily in the direction of the arrow. be able to. Thus, the amount of air to be supplied to the air supply connection port 25a and the second air supply connection port 25a-1 can be set arbitrarily. An appropriate amount of air supply becomes possible.

FIG. 9 is an explanatory view showing another embodiment of the air volume distribution means 30. In this embodiment, a through hole 35 is provided on the entire surface.
a and a slide plate 36 having a through hole 36a formed on the entire surface. Slide plate 36 to fixed plate 3
5 is slidably attached by a thumbscrew 37 to adjust the positions of the through-holes 35a and 36a to each other, thereby connecting the air supply connection port 25a and the second air supply connection port 25.
The air volume supplied to a-1 can be set arbitrarily.

A switching means for stopping the supply of air to any one of the plurality of air supply connection ports provided in the total heat exchanger can be provided. This makes it possible to select an appropriate connection port according to the installation location of the air supply grille, and to optimally connect the total heat exchanger and the air supply grille.

[0040]

According to the present invention, the following effects can be obtained.

(1) A total heat exchanger for exchanging heat between indoor exhaust air and indoor air supply, a first duct having a length capable of connecting the total heat exchanger to the outside of the structure, A second duct having a length connectable to the total heat exchanger and an exhaust grill and an air supply grill provided indoors, wherein at least the second duct is a flexible duct with dew condensation prevention which is freely expandable and contractible. Thus, it is possible to obtain a ventilation unit that is excellent in adaptability to changes in site conditions and workability.

(2) Between the total heat exchanger and the air supply grille,
By interposing the heat exchanger for temperature adjustment, not only a ventilation unit but also an air conditioning unit having the above effect can be obtained.

(3) An elastic packing which can be attached simply by inserting a duct at the connection port, or a large-diameter bent which can be fixed with the end of the duct abutting the duct connection port. The provision of the piece makes it possible to greatly reduce the time required for connecting the duct as compared with a conventional product that requires screwing and taping.

(4) Since the total heat exchanger is provided with a plurality of air supply connection ports and / or exhaust connection ports that can be connected to the second duct, the total heat exchanger can be directly connected without passing through a branch chamber. And a plurality of exhaust grills or air supply grills can be connected.

(5) By providing air flow distribution means capable of adjusting the air flow to a plurality of air supply connection ports provided in the total heat exchanger, each of the total heat exchangers has a different air flow. An appropriate amount of air can be supplied to the air supply grill.

(6) By constructing the air volume adjusting means by a shielding plate provided in the flow path and having an adjustable tilt angle, or a plurality of plate members having a large number of through holes and relatively slidable The air volume can be adjusted with a relatively simple structure.

(7) By providing a switching means for stopping the supply of air to any of the plurality of air supply connection ports provided in the total heat exchanger, the optimum arrangement of the total heat exchanger and the air supply grill is provided. Connection is possible.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an overall configuration of a ventilation unit according to an embodiment of the present invention.

FIG. 2 is a plan view of the ventilation unit shown in FIG.

FIG. 3 (a) is a plan view of the total heat exchanger shown in FIG. 1,
(B) is a front view, (c) is a right side view.

FIG. 4 is an explanatory diagram showing a state of attachment of a duct to a total heat exchanger.

FIG. 5 is a perspective view showing another embodiment of the duct connection portion.

FIG. 6 is a plan view showing an arrangement example of a total heat exchanger.

FIG. 7 is a plan view showing another embodiment of the ventilation unit.

FIG. 8 is an explanatory view showing an air volume distribution means of the total heat exchanger shown in FIG. 7;

FIG. 9 is an explanatory view showing another embodiment of the air volume distribution means.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Total heat exchanger 11 Air supply grille 12 Exhaust grille 13 Chamber 14 First duct 15 Second duct 16 Exhaust grille 17 Air supply grille 21 Housing 22 Total heat exchange element 23 Exhaust air blower 24 Air supply air blower 25a, 25d Air supply Connection port 25b, 25c Exhaust connection port 26 Maintenance cover 28 Fixing tool 28a Fixing piece 28b Rising piece 28c Bending piece 28d Cutout portion 28e Tapered portion 29 Cylindrical body 29a Flange 29b Elastic member 30 Airflow distribution means 31 Damper 32 Flexible wire 33 Hexagon Hole 34 Handle 35 Fixing plate 35a, 36a Through hole 36 Slide plate 37 Thumbscrew

Claims (8)

[Claims] 1. A total heat exchanger for exchanging heat between indoor exhaust air and indoor air supply; a first duct having a length connectable to the total heat exchanger and the outside of a structure; A second duct having a length capable of connecting a heat exchanger to an exhaust grill and an air supply grill provided indoors;
A ventilation unit characterized in that the duct is a flexible duct with dew condensation prevention that can be freely expanded and contracted. 2. The ventilation unit according to claim 1, wherein a heat exchanger is interposed between the total heat exchanger and the air supply grill. 3. An elastic packing which can be attached by inserting said duct at each duct connection port of said total heat exchanger, exhaust grille and air supply grille. Ventilation unit as described. 4. The apparatus according to claim 1, wherein each of the duct connection ports of the total heat exchanger, the exhaust grill, and the air supply grill is provided with a bent piece that can be fixed with the end of the duct abutting the duct connection port. The ventilation unit according to claim 1, wherein 5. The ventilation unit according to claim 1, wherein the total heat exchanger is provided with a plurality of supply connection ports and / or exhaust connection ports that can be connected to the second duct. . 6. The ventilation unit according to claim 5, further comprising an air volume distribution unit capable of adjusting an air flow rate to a plurality of air supply connection ports provided in the total heat exchanger. 7. The air flow distribution means comprises a shield plate whose tilt angle can be adjusted, or a plurality of plate members which have a large number of through holes and are relatively slidable. Ventilation unit. 8. The ventilation unit according to claim 5, further comprising switching means for stopping supply of air to one of the plurality of air supply connection ports provided in the total heat exchanger.