JPH0745948B2 - Ventilation - Google Patents

Description

The present invention relates to a ceiling-embedded ventilation device, and more particularly to a ventilation device including a heat exchanger.

[Conventional technology]

A ceiling-embedded ventilation device has been widely known, and it has been conventionally performed to exchange heat between air supply and exhaust during ventilation. This heat exchange method is roughly classified into a type in which heat is exchanged while the supply air and the exhaust air flow in the static heat exchanger as shown in Japanese Utility Model Laid-Open No. 174554/1984. Japanese Patent Laid-Open No. 60-82733 and Japanese Patent Laid-Open No. 60-827
As shown in Japanese Patent Laid-Open No. 34-34, there is a type in which heat is exchanged by rotating a heat exchanger in a counterflow of supply air and exhaust air.

Also, from the perspective of the air supply / exhaust grille
Japanese Patent No. 4554 discloses that a supply grill and an exhaust suction port are arranged side by side in a single detachable grill, and in Japanese Utility Model Laid-Open No. 57-25933, each is disclosed. It is shown to have a grille with outlets formed at right angles (in all directions). Furthermore, although it is not a ventilation device, in the heat exchange device, the air after heat exchange is blown in all directions,
A type of grill that sucks indoor air from the center is known as a product group of Hitachi's RCI series of ceiling-embedded cassette type air conditioners.

Further, as a device related to the device of the present invention, Japanese Patent Laid-Open No.
-23809, Japanese Utility Model Publication No. 55-123729, 55-123730, 58-5
7626,58-57627,59-49827,59-62428, etc. are mentioned.

[Problems to be solved by the invention]

In this type of conventional ventilation device, an air supply grill and an exhaust grill are often provided separately. In this case, each grill can be installed at a desired location, but it is installed on the ceiling. In that case, it was necessary to make two holes for installation.

Further, it was difficult to make the supply pressure of the supply air uniform. This can be said even when the air supply and the air exhaust are combined into a single grill.

In addition, since the air in the room is dirty between the air supply grill and the exhaust grill, the degree of dirt is worse in the exhaust grill,
Although it is frequently cleaned, when dirty indoor air flows toward the exhaust grill, it sometimes touches the ceiling surface near the exhaust grill, so the ceiling surface was sometimes soiled. .

The present invention has been made in view of the above points, and an object thereof is to be able to form an air supply grill and an exhaust grill in one place, and to supply air supply over the entire circumference. It is to obtain a ventilation system that is more uniform and does not pollute the ceiling surface by exhaust gas.

[Means for solving problems]

In order to achieve the above object, a feature of the present invention is that in a device that ventilates while exchanging heat between clean air and room air, an air supply fan that supplies and pressurizes the clean air, and an indoor unit An exhaust fan for exhausting and pressurizing air, a heat exchanger for exchanging heat between the air supply flow of the air supply fan and the exhaust air flow of the exhaust fan, and the air supply device provided on the discharge port side of the air supply fan. A discharge chamber that temporarily retains the discharge air from the fan, and a supply air outlet that is formed in an annular shape and communicates with the discharge chamber to blow out the air in the discharge chamber into the chamber, and the supply air outlet that is formed in an annular shape. Located in the central part,
An exhaust grill that communicates with the exhaust fan to exhaust the air in the room.

According to a preferred embodiment of the present invention, the discharge chamber includes a shield plate that corresponds to the discharge port of the air supply fan and changes the dynamic pressure component of the supply air from the discharge port into static pressure.

Further, according to a preferred embodiment of the present invention, the exhaust grill is detachably attached to a central portion of the air supply outlet.

[Action]

With the above configuration, the air supply grill and the exhaust grill can be formed at one place, and the air supply can be blown out more uniformly over the entire circumference. Since the entire circumference is surrounded by the outlet, dirty air in the room does not touch the ceiling surface when flowing toward the exhaust grille and does not pollute the ceiling surface.

Regarding the equalization of the supply pressure of the supply air, the supply air sent from the supply fan is temporarily stopped in the discharge chamber and the dynamic pressure component of the supply air is changed to static pressure before it is discharged.
The blowout pressure can be made more uniform over the entire circumference.

At this time, if the discharge chamber is provided with a shield plate that corresponds to the discharge port of the air supply fan and changes the dynamic pressure component of the supply air from the discharge port into static pressure, the supply air flow discharged from the air supply fan is shielded. Then, it will be temporarily stopped in the discharge chamber, and the uniformity of the blowout pressure will be further promoted.

If the exhaust grill is detachably attached to the central portion of the air supply outlet, even if the exhaust grill becomes dirty, only the exhaust grill can be removed and washed.

〔Example〕

Hereinafter, specific examples of the present invention will be described with reference to the accompanying drawings. FIG. 1 is an overall configuration diagram showing a specific embodiment of the present invention, where 1 is an air supply side fan unit and 2 is an exhaust side fan unit. These air supply / exhaust side fan units 1 and 2 are attached to fan casings 3 and 4, respectively. The air supply side fan unit 1, the exhaust side fan unit 2, and the respective fan casings 3 and 4 have basically the same structure. The fan casings 3 and 4 sandwich the heat exchanger casing 6 to which the rotary heat exchanger 5 is attached, and sandwich the main body casing 7
It is located inside. Although a rotary heat exchanger is shown in the embodiment, the present invention is not limited to this, and an air flow crossing type may be used.

On the downstream side of the main body casing 7, as shown in FIG.
Air supply / exhaust grill unit 8 configured separately as shown in the figure
Is provided. The air supply / exhaust grill unit 8 is provided with an air supply grill 9 and an exhaust grill 10.

The pressurized air whose pressure is made uniform in the discharge chamber 15 by the shielding plate 16 is provided between the air supply grill 9 and the exhaust grill 10 through an annular grill outlet 17 formed on the entire circumference of the exhaust grill 10. It is blown out indoors.

Air that needs ventilation in the room is sucked in from the exhaust grill 10, and the main body casing 7 and the air supply / exhaust grill unit 8
It is discharged to the outside air or an air purifying device (not shown) or the like through the exhaust passage 18 formed inside. Exhaust can be performed from an exhaust flange 19 provided at one end of the main body casing 7 through an exhaust duct (not shown) or the like.

Exhaust gas flowing through the exhaust flow path 18 passes through the heat exchanger 5 in the flow path, performs heat exchange during that time, and is discharged by the impeller 20 in the exhaust side fan unit 2.

The heat exchanger 5 is rotated by a heat exchanger driving motor 21, and the rotation thereof enables heat exchange between the air supply side and the exhaust side. Since this type of heat exchanger is conventionally known and the gist of the present invention does not relate to the structure of the heat exchanger, it will not be described further.

The main body casing 7 and the air supply / exhaust grill unit 8 are the first
It may be integrally formed as shown in the figure, or may be separately formed as shown in FIGS. The air supply / exhaust fan casings 3 and 4 and the heat exchanger casing 6 can be mounted by inserting them into the main body casing 7 from one end side. After the main body casing 7 is assembled in this manner, the air supply / exhaust grill unit 8 is detachably attached to the main body casing 7 with screws or the like. The connection between the air supply / exhaust grill unit 8 and the body casing 7 is shown in FIGS.
In addition to the one shown in the figure, as shown in FIG.
You can also connect by 21,22. In this way, the air supply / exhaust grill unit 8 can be mounted at any desired position.

The air supply / exhaust grill unit 8 is formed in a box shape, and a wall surface on one side of the main body casing 7 side is open to the main body casing 7. The grill unit 8 is internally provided with a partition wall 23 which divides the grill unit 8 into upper and lower parts. The partition wall 23 is communicated with the upper and lower sides by a communication port 24 on the side opposite to the main body casing 7. An air supply grill 9 is attached to the lower surface of the grill unit 8.

The air supply grill 9 is a connecting cylinder to an outer ring 91 having an inner opening.
92 is attached by an appropriate number of connecting rods 93, 93. The connecting cylinder 92 may be provided with a flange portion 95 having a long hole 94 as shown in FIG. 6, or may be simply formed into a cylindrical shape as shown in FIGS. However,
Also in this case, it is necessary to construct a packing means so that the air flow does not leak (not particularly shown). This connecting tube 92
An exhaust grill mounting portion 96 for mounting the exhaust grill 10 is provided below the. The shape of the exhaust grill mounting portion 96 is formed so as to match the shape of the mounting rising portion 101 of the exhaust grill 10. A quadrangular shape is shown in FIG. 6 and a cylindrical shape is shown in FIG. It is shown. A ridge 97 is formed on the lower end of the outer periphery of the exhaust grill mounting portion 96, and notched holes 98, 98 are formed in the two opposing side wall portions of the mounting portion 96 at appropriate intervals, thereby elastic Piece 99
Are formed. The elastic piece 99 is also elastically engaged with the elastic piece 103 formed between the notch holes 102 formed at appropriate intervals on the two opposing side wall portions of the rising portion 101 of the exhaust grill 10. Exhaust grill 1
0 is attached to the air supply grill 9. The elastic pieces 103, 103 on the side of the exhaust grill 10 are formed with projections 104, 104 for hooking fingers to the outside.
When removing the, place your finger on the protrusion 104 and
By pulling in the direction of arrow A in the figure, both elastic pieces 99
The elastic engagement between and 104 is disengaged to allow removal.

When the exhaust grill mounting portion 96 is formed in a cylindrical shape as shown in FIG. 7, the rising member 101 of the exhaust grill 10 is naturally formed in a cylindrical shape as well. In this case, it is not necessary to particularly form the elastic piece 99 on the exhaust grill mounting portion 96 side. A part of the protrusion 97 at the outer lower end of the mounting portion 96 is cut out, and the elastic piece 103 of the rising member 101 of the exhaust grill 10 is inserted in accordance with the cutout portion and attached by rotating a little. You can

Further, as means for engaging the air supply grill 9 and the exhaust grill 10 with each other, as shown in FIG. 9, the rising portion 1 corresponds to the L-shaped member 100 attached to the side surface of the exhaust grill mounting portion 96.
The elastic engagement member 105 provided on the side surface of 01 can removably engage.

The exhaust grill 10 is as shown in FIG. 10 when viewed from the direction of A in FIG. Its cross section is best shown in FIG. The cross-sectional shape of the crosspiece 110 of the exhaust grill 10 is not only rectangular as shown in FIG. 11 but also rounded at the lower end as shown in FIGS. 12a to 12c in order to reduce the inflow resistance of the exhaust flow. One having a gradient on one side, or one having a gradient on both sides may be used.

A filter 30 may be provided between the exhaust grill 10 and the exhaust grill mounting portion 96. By this filter 30, pollutants in the exhaust air can be collected and the heat exchanger 5 is not polluted.

The ceiling-embedded ventilation device of the present invention is, as shown in FIG.
It is hung from a concrete ceiling 34 or the like with hanging bolts 32, 32 so that only the air supply / exhaust grills 9, 10 are exposed from the surface of the decorative ceiling 36. However, as shown in FIG. 14, the boundary line formed by the surface 36 of the decorative ceiling and the outer contours of the air supply / exhaust grills 9 and 10 may not be parallel to each other and may be slightly deviated from each other. This comes from the procedure of ceiling construction,
First hang the ventilation device with the hanging bolts 32, 32,
Then it is to raise the decorative ceiling 36.

In such a case, in the ventilator of the present invention, the flange portion formed on the upper surface of the connecting cylinder 92 above the exhaust grill mounting portion 96.
It is possible to match the contours by loosening the screw 31 connected through the long hole 94 in the hole 95, correcting the misalignment, and re-tightening.

Further, an embodiment of the present invention will be described along with the flow of air flow. Clean air from outside air or an air cleaning device (not shown because it has nothing to do with the gist of the present invention) or the like is connected to a supply flange 11 formed at one end of the main body casing 7 for supplying air (see FIG. (Not shown). The air supply flowing in from the air supply flange 11 flows through the air supply passage 12 formed in the main body casing 7, passes through the heat exchanger 5, and flows into the air supply side fan unit 1.

The airflow flowing into the air supply side fan unit 1 is pressurized by the air supply fan impeller 13 and is discharged from the discharge port 14 of the air supply side fan unit 1 (see FIG. 2). A discharge chamber 15 is formed in the intake / exhaust grill unit 8, and the pressurized air discharged from the discharge port 14 of the air supply side fan unit 1 flows therein. A shielding plate 16 is provided in the discharge chamber 15 so as to face the discharge port 14.

It is desirable that the shielding plate is provided facing the discharge port 14 of the air supply side fan unit 1 with a proper distance. The shutoff plate 16 converts the dynamic pressure component (blowing pressure) of the airflow discharged from the discharge port 14 into a static pressure component by colliding with the shutoff plate, and makes the pressure in the discharge chamber 15 uniform. It is for keeping pressure.

Further, the shut-off plate 16 has a width D of the discharge port 14 of the air supply fan, a distance L from the discharge port 14 to the shut-off plate 16, and passage widths B ₁ and B _{2 on} both sides of the shut-off plate 16. Then, the following conditions are preferable.

L> D B ₁ (and B ₂ )> D The supply air that has collided with the shielding plate 16 and is uniformly pressurized stays in the temporary discharge chamber 15, and fresh air is supplied from the supply air grill outlet 17. Blow out. At this time, since the dynamic pressure component is converted into the static pressure by the shielding plate 16, it is evenly blown out from the air outlet 17 and also has the effect of reducing noise.

The air in the room is sucked from the exhaust grille 10 in the center part surrounded by the blowout flow of fresh supply air, passes through the exhaust flow path 18, passes through the heat exchanger 5, and is exhausted by the exhaust side fan unit 2. .

The arrangement and the flow of the air flow when a plurality of the ceiling-embedded ventilation devices of the present invention are arranged on the ceiling are compared with the conventional one.
Shown in Figures 15 and 16. The thing of the present invention is shown in FIG. 15, and since the blowout opening can be secured around the entire circumference, the size of the grill can be made smaller than that in the one-way or two-way blowout, and especially the standard for the ceiling board inspection port. Can be adjusted to the size (45 cm ^□ ). As a result, the air supply / exhaust grills 9 and 10 can be arranged exactly in the mosaic arrangement of the decorative ceiling, and when inspecting the ventilation device, it can be easily done by removing the air supply / exhaust grills 9 and 10. You can

Further, the installation direction is not limited because the air is blown all around, and it is possible to uniformly supply fresh air to the entire room.
In comparison with this, in the one-way or two-way blowing, the air supply airflow is directed in a specific direction, so that it is possible that the air supply air distribution in the room may be uneven depending on the installation position and direction.

〔effect〕

As is apparent from the above description, according to the present invention, the air supply grill and the exhaust grill can be formed in one place,
Moreover, the air supply is more uniform over the entire circumference,
Moreover, since the exhaust grill is surrounded by the air supply grill outlet, the ventilation system does not touch the ceiling surface when dirty indoor air flows toward the exhaust grill and does not pollute the ceiling surface. Can be obtained.

In particular, for equalizing the supply pressure of the supply air, the supply air sent from the supply fan is temporarily stopped in the discharge chamber to change the dynamic pressure component of the supply air to static pressure before it is discharged. The pressure can be made more uniform over the entire circumference, and fresh air can be uniformly supplied to the entire room.

At this time, if the discharge chamber is provided with a shield plate that corresponds to the discharge port of the air supply fan and changes the dynamic pressure component of the supply air from the discharge port into static pressure, the supply air flow discharged from the air supply fan is shielded. Then, it will be temporarily stopped in the discharge chamber, and the uniformity of the blowout pressure will be further promoted.

Further, if the exhaust grill is detachably attached to the center of the air supply outlet, even if the exhaust grill becomes dirty, it can be easily cleaned by removing only the exhaust grill and washing it. .

[Brief description of drawings]

FIG. 1 is an overall structural view showing an embodiment of the present invention, FIG. 2 is a partial structural sectional view seen from the upper surface of FIG. 1, and FIG. 3 is a main unit and an air supply / exhaust grill unit are divided. FIG. 4 is an overall structural view of a possible example, FIG. 4 is an overall structural view showing a state in which each unit of FIG. 3 is connected by a duct, and FIG.
6 to 11 are partial views showing details of the air supply / exhaust duct, and FIGS. 12a to 12c are sectional views showing modified examples of the cross-sectional shape of the machine of the exhaust duct. , Thirteenth to fifteen
FIG. 16 is a diagram showing a mounting state of the ventilation device, and FIG. 16 is a diagram showing a ceiling mounting state of the one-way blowing grill. 1 ... Air supply side fan unit, 2 ... Exhaust side fan unit, 3,4 ... Fan casing, 5 ... Heat exchanger, 7
...... Main body casing, 8 …… Supply and exhaust grill unit, 9
…… Air supply grill, 10 …… Exhaust grill, 16 …… Shield plate.

Claims (3)

[Claims] 1. A device for ventilating while exchanging heat between clean air and room air, a supply fan for supplying and pressurizing the clean air, an exhaust fan for exhausting and pressurizing the room air, and the supply air. A heat exchanger for exchanging heat between the air supply flow by the fan and the exhaust air flow by the exhaust fan; a discharge chamber provided on the discharge port side of the air supply fan for temporarily stopping the air discharged by the air supply fan; An air supply outlet that is formed in an annular shape and communicates with the discharge chamber to blow the air in the discharge chamber into the chamber, and is located in the center of the annular air supply outlet and communicates with the exhaust fan. And an exhaust grill for exhausting the air in the room. 2. The ventilation according to claim 1, wherein the discharge chamber is provided with a shield plate which corresponds to a discharge port of the air supply fan and changes a dynamic pressure component of the supply air from the discharge port into a static pressure. apparatus. 3. The ventilation device according to claim 1, wherein the exhaust grill is detachably attached to a central portion of the air supply outlet.