KR101447097B1 - Powerless heat recovery ventilator - Google Patents

Abstract

A non-motorized waste heat recovery type ventilator is disclosed. A first ventilation hole provided through the outer surface of the building; a second ventilation hole provided adjacent to the first ventilation hole so as to penetrate the outer surface of the building; a first ventilation hole provided in the interior of the building, And a second diffuser installed in the interior of the building and connected to one end of the second ventilation hole. The other end of the first ventilation hole protrudes from the outer surface of the building, and the wind direction of the wind And the other end of the second vent is protruded from the outer surface of the building and opened toward the second direction opposite to the first direction so that the wind is blown along the outer surface of the building One of the first and second vents functions as a power supply mechanism by a positive pressure and the other one of the first and second vents functions as an exhaust port by a negative pressure. The non-powered waste heat recovery type ventilator uses the wind pressure of the wind as a power source, that is, it realizes indoor ventilation without using a separate power source, so that it is possible to ventilate for 24 hours without worrying about the electric charge. Indoor air quality is improved.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a powerless heat recovery ventilator

The present invention relates to a non-powered waste heat recovery type ventilator.

Generally, in an enclosed indoor space such as a house or an office, the amount of carbon dioxide (CO 2) is increased due to human respiration over time, and the air becomes turbid, and formaldehyde and volatile organic compounds VOCs) are generated in a large amount and cause harm to human health.

On the contrary, indoor and outdoor are communicated with each other using a supply mechanism and an exhaust port, and pleasant air outdoors is introduced into the room through a supply mechanism, and the turbid air in the closed room is discharged to the outside through the exhaust port, Ventilation equipment for ventilation has been developed.

In this regard, it is obligatory to install mechanical ventilation equipment or natural ventilation equipment in apartment buildings of more than 100 generations built in Korea recently. Currently, apartments are equipped with electric heat exchanger type mechanical ventilation equipment for energy conservation. However, the energy saving effect is lost due to the power consumption for operating the mechanical ventilation equipment, so that the operating rate of the mechanical ventilation equipment is very low to be.

Ventilation equipment can be classified as natural ventilation equipment and mechanical ventilation equipment. The natural ventilation system is a system in which ventilation is performed by buoyancy due to wind pressure outside the building or temperature difference between indoor and outdoor.

Conventional natural ventilation equipment is installed in a window frame or a wall, but since waste heat is not recovered, energy is wasted. In winter, which is the most necessary season for ventilation, cold outside air directly flows into a room and a cold draft There is a concern.

Most of the waste heat recovery type ventilation equipment is a mechanical ventilation equipment, in which the fan is operated to supply and exhaust air, and energy saving is often achieved by installing a waste heat recovery device.

However, the mechanical waste heat recovery type ventilation equipment has a large amount of energy saving effect due to the use of electric power for operating the fan. In addition, most mechanical waste heat recovery type ventilation equipment is connected to each room by a small-sized duct, so that it is almost impossible to clean the duct and it is difficult to manage and there is a fear of secondary pollution due to duct pollution There was a problem that it was large.

The above-described background technology is technical information that the inventor holds for the derivation of the present invention or acquired in the process of deriving the present invention, and can not necessarily be a known technology disclosed to the general public prior to the filing of the present invention.

On the other hand, Korean Patent Registration No. 10-1039077 discloses an air supply grille protruding to the outside of a building and facing to opposite directions.

Patent Document 1: Korean Patent Publication No. 10-1039077

An object of the present invention is to provide a non-powered waste heat recovery type ventilator which can realize indoor ventilation by using air wind pressure as a power source, that is, without using a separate power source.

It is another object of the present invention to provide a non-powered waste heat recovery type ventilator which can prevent cold draft in a ventilator even during the winter season through heat exchange.

The technical problems other than the present invention can be easily understood from the following description.

According to an aspect of the present invention, there is provided a building comprising: a first vent hole formed to pass through an outer surface of a building; a second vent hole provided adjacent to the first vent hole to penetrate the outer surface of the building; And a second diffuser installed in the interior of the building and connected to one end of the second ventilation hole, wherein the other end of the first ventilation hole protrudes from the outer surface of the building, And the other end of the second vent is protruded from the outer surface of the building and opened toward a second direction opposite to the first direction, When the wind pressure is applied along the outer surface, one of the first and second vents functions as a power supply mechanism by a positive pressure, and the other one of the first and second vents is discharged to the exhaust port The non-powered heat recovery ventilators, characterized in that the function is provided.

When the first ventilation hole functions as a power supply, the first diffuser functions as a power supply for supplying the introduced outside air into the room. When the first ventilation hole functions as an exhaust port, the first diffuser is an exhaust port for discharging the room air to the outside Function.

The first diffuser and the second diffuser are integrated into one indoor air supply and exhaust unit so that a part of the indoor air supply and exhaust unit can function as a first diffuser and the other part of the indoor air supply and exhaust unit can function as a second diffuser.

A heat exchanging unit is interposed between the first vent and the second vent, and between the first diffuser and the second diffuser. In the heat exchanging unit, air flowing through the first vent and the first diffuser, and air flowing through the second vent and the second diffuser The heat exchange can be performed between the air flowing through the heat exchanger.

An air filter may be interposed between the first and second vents and the heat exchange unit.

The building may be provided with a semi-cylindrical space defined by a ceiling finish, a heat exchange unit may be installed in the semi-cylindrical space, and the first diffuser and the second diffuser may be installed to be exposed to the room side through the ceiling finish.

Maintenance of the heat exchange unit may be possible through the indoor diffuser. The first vent and the first diffuser are connected to the duct, the second vent and the second diffuser are connected to the second duct, and the first duct and the second duct are formed to be short in length to facilitate cleaning .

Other aspects, features, and advantages other than those described above will become apparent from the following drawings, claims, and the detailed description of the invention.

According to the preferred embodiment of the present invention, the wind pressure of the wind is used as a power source, that is, the indoor ventilation is implemented in a non-powered manner without using a separate power source, The indoor air quality is improved. In addition, by constructing a waste heat recovery system by adding a heat exchange unit, it is possible to contribute to green growth through energy saving, and since heat exchange is performed, cold draft in a ventilation apparatus can be prevented even in winter.

In addition, the energy saving effect can be maximized by conserving energy primarily by the natural ventilation method using wind pressure around the building as a power source, and by conserving energy secondarily by the waste heat recovery heat exchanger.

Also, since the ventilation device can be maintained and managed through the ceiling opening for installing the air supply and exhaust diffusers, it is possible to maintain and manage the ceiling without installing a separate check port.

Further, the ventilator according to the embodiment of the present invention has a short length and a straight shape, and can be easily cleaned, thereby reducing the possibility of secondary contamination due to contamination in the duct.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing an outside air supply and exhaust unit according to an embodiment of the present invention. Fig.
2 is a conceptual diagram of a non-powered waste heat recovery type ventilator according to an embodiment of the present invention.
FIG. 3 is a state of use in which a ventilation device for non-motorized waste heat recovery is installed according to an embodiment of the present invention; FIG.

The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated and described in the drawings. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Referring to the accompanying drawings, the same or corresponding components are denoted by the same reference numerals, .

FIG. 1 is a view showing an outside air supply and exhaust unit according to an embodiment of the present invention. Referring to Fig. 1, the enclosure 3, the outside air supply and exhaust unit 10, and the air vents 12 and 14 are shown.

The present embodiment is characterized by an outside air supply and exhaust (inflow and outflow) unit using the wind pressure of the wind blowing around the building as a power source, and a ventilation apparatus using the same.

In addition to the outside air supply and exhaust unit 10, the ventilation system further includes a heat exchange unit that performs waste heat recovery in the air supply and exhaust process, and an indoor air supply and exhaust unit that integrates supply and exhaust into the room. And the ventilation can be performed by natural force (wind pressure of wind).

Further, since no separate motor or fan is used for the ventilation device, no noise is generated in the ventilation device, and the distance between the outside air supply / discharge unit 10 and the indoor air supply / exhaust unit is short, The duct can be easily cleaned and the maintenance of the ventilation system is easy.

There is always a certain amount of wind around the building. The speed of the wind blowing around the building depends on the surrounding topography, the arrangement of the objects and the shape of the building, and the wind direction changes according to the season.

The present embodiment relates to a non-motorized ventilating apparatus using wind pressure of wind blowing around the building as a power source. In addition to obtaining a power source for generating ventilation from natural force, a heat exchange unit is added to perform heat exchange So that additional energy saving is possible.

The outside air supply and demand air supply and exhaust unit 10 according to the present embodiment is a natural ventilation type air supply and exhaust unit in which indoor ventilation is performed by using the wind pressure of the wind around the building, The pair of vents 12 and 14 are of a basic structure.

Here, the 'envelope' refers to a structure that divides a building such as an outer wall or a window of a building into an indoor space and an outdoor space. A pair of ventilation holes 12 and 14 according to the present embodiment penetrates the enclosure 3 from the interior of the building So as to be exposed to the outdoor side.

Further, the pair of vents 12 and 14 may be disposed adjacent to each other. If necessary, a pair of vents 12 and 14 may be integrally coupled to each other as shown in FIG.

The pair of air vents 12 and 14 are installed so as to penetrate through the outer casing 3 of the building so that one end of each of the air vents 12 and 14 is opened toward the interior of the building and the other end is installed to protrude from the outer surface of the building do.

The pair of air vents 12 and 14 according to the present embodiment are characterized by appropriately designing the direction in which the outdoor side opening portion (the other end portion) is opened to utilize wind wind pressure as the ventilation power.

1, any one of the pair of air vents 12 and 14 (for example, the first air vents 12) is arranged in a direction opposite to the direction of the wind along the outer surface of the building (For example, 'b' in FIG. 1), and the remaining air vents (for example, the second air vents 14) are opened in a direction Quot; direction).

To this end, the pair of vents 12 and 14 according to the present embodiment are all bent in a L-shaped shape while being protruded from the outer surface of the building, bent in opposite directions to each other, The pair of vents 12, 14 can each be opened in the direction of facing the wind or back.

For example, a pair of vents 12, 14 project from the outer surface of the building, one of which may be bent by 90 degrees to the left and the other by 90 degrees to the right.

By configuring the pair of vents 12 and 14 to bend in the left and right directions, that is, in the horizontal direction, rainwater can be prevented from penetrating through the vents 12 and 14 in rainy weather.

In the state where the pair of air vents 12 and 14 are opened so as to be opposite to each other and wind pressure is applied to the air vents along the outer surface of the building, (+) Pressure is applied to any one of the air openings 12 opened in the direction opposite to the wind, so that outside air is introduced through the air openings 12. That is, the air vent 12 functions as an air supply mechanism for the outside air.

In this case, negative pressure is applied to the other one of the air vents 14, that is, the air vents 14 opened in the wind direction, so that indoor air is discharged through the air vents 14. That is, the vent hole 14 functions as an exhaust port of room air.

In summary, the outside air supply and demand air supply unit 10 according to the present embodiment is composed of a pair of air vents 12, 14 protruding from the outer surface of the building by a predetermined distance, One of the pair of air vents 12 and 14 serves as an air supply unit and the other one serves as an air outlet to enable indoor ventilation using natural force (wind pressure of the outside air) as a power source do.

2 is a conceptual diagram of a non-powered waste heat recovery type ventilator according to an embodiment of the present invention. 2, the outer shell 3, the outside air supply and exhaust unit 10, the air vents 12 and 14, the indoor air supply and exhaust unit 20, the diffusers 22 and 24, the heat exchange unit 30, 32 are shown.

This embodiment relates to a waste heat recovery type natural ventilation equipment, which is a combination of a natural ventilation equipment and a waste heat recovery equipment.

That is, it is a non-motorized ventilation system that performs ventilation by using natural energy without using power, and is characterized by saving energy through recovery of waste heat during ventilation.

Conventional mechanical ventilation equipment that uses ducts to connect each room has a problem that there is a great concern about secondary pollution due to duct pollution. To prevent such problems, there is a need for ventilation equipment that does not use a duct or uses the least amount .

On the other hand, in order to maintain and repair the ventilation equipment installed in the ceiling space, it is necessary to install an inspection hole on the ceiling. However, in case of an apartment or a house, installing the inspection hole on the ceiling spoils the interior of the room, It is necessary to configure the ventilation system.

Thus, the present embodiment is a natural ventilation system using wind power around a building as a power source for ventilation, in which a waste heat recovery heat exchanger is installed to recover waste heat during ventilation, a single ventilation facility is installed in one room, The ventilation device is characterized by minimizing the length of the duct to within 1 m, thereby simplifying the cleaning of the inside of the duct, thereby preventing secondary contamination due to duct contamination.

In the non-motorized waste heat recovery type ventilator according to the present embodiment, maintenance and repair such as replacement of a heat exchanging element and replacement of a filter can be performed through an opening made in a ceiling for installation of an indoor air supply / discharge port.

The ventilator shown in Fig. 2 is a ventilator using the outside air supply / discharge unit 10 shown in Fig. 1, and is a non-powered ventilator using the wind pressure of the outside air as a power source as described above.

The non-powered ventilator according to the present embodiment is roughly divided into two parts, namely, the outside air supply and exhaust unit 10 and the indoor air supply and exhaust unit 20.

1, the outside air supply and exhaust unit 10 includes a pair of air vents 12, 12 projecting from the outer surface of the building through a predetermined distance from the outer surface 3, 14, one of which is an air supply mechanism and the other of which functions as an air outlet.

That is, the outside air supply and exhaust unit 10 may be formed in a structure capable of simultaneously performing supply and exhaust by the air pressure around the building, or may be formed in the form of a unit in which a supply mechanism and an exhaust port are integrated.

The indoor air supply and exhaust unit 20 can be configured as a single integrated diffuser in the same manner as the outdoor air supply and exhaust unit 10 so as to supply and exhaust air.

The indoor air supply and exhaust unit 20 is composed of a pair of diffusers 22 and 24 installed in an interior of the building, and each diffuser can be connected to each of the air vents. For example, the first vent hole 12 may be connected to the first diffuser 22, and the second vent hole 14 may be connected to the second diffuser 24. Here, the connection of the vent and the diffuser means that the air to be supplied or discharged can be communicated and other components may be interposed between the vent and the diffuser, The present invention should not be construed as being limited to the case where the present invention is applied only to the case where it is directly or indirectly excluded from other elements.

As described above, when any one of the pair of air vents 12 and 14 (referred to as a 'first air vents') functions as a power supply unit, the outside air flows through the first air vents 12, The diffuser 22 (referred to as a 'first diffuser') connected to the first air supply opening 12 functions as a supply mechanism for supplying outside air introduced through the first air supply opening 12 to the room.

In the same manner, when any one of the pair of air vents 12 and 14 functions as the air supply unit, indoor air is discharged through the second air vents 14, The diffuser 24 (referred to as a 'second diffuser') connected to the first air inlet 14 functions as an air outlet for discharging indoor air to the outside through the second air inlet 14.

Thus, the non-powered ventilation system according to the present embodiment is constituted by the outside air supply and exhaust unit 10 (a pair of air vents 12 and 14) and the indoor air supply and exhaust unit 20 (a pair of diffusers 22 and 24) However, since the external wind pressure is used as a power source, it can be installed adjacent to the outer wall surface of the building as shown in FIG.

In this case, the outside air supply / discharge unit 10 and the indoor air supply / discharge unit 20 may be directly connected to each other or may be connected through a duct. Even if a duct is interposed, the length of the duct can be made very short, It is possible to perform a simple and easy cleaning, and therefore, it is possible to eliminate the fear of secondary pollution in the room due to contamination of the duct.

Meanwhile, a heat exchange unit 30 may further be interposed between the outside air supply and exhaust unit 10 and the indoor air supply and exhaust unit 20 of the ventilator according to the present embodiment.

In the heat exchange unit (30), heat exchange can be performed while the supply air and the exhaust gas cross each other. That is, the waste heat can be recovered from the exhausted air and transferred to the air to be supplied.

For example, when it is assumed that outside air is introduced through the first vent hole 12 and the first diffuser 22 and indoor air is exhausted through the second diffuser 24 and the second vent hole 14, In the heat exchanging unit 30 located between the unit 10 and the indoor air supply and exhaust unit 20, the incoming outdoor air and the discharged indoor air intersect each other. In this process, heat exchange is performed between the indoor air to be discharged and the incoming outdoor air Lt; / RTI >

In the case of winter, for example, the temperature of the outside air is very low compared with the temperature of the room air. Therefore, rather than directly introducing the outside air, heat (waste heat) is recovered from the discharged room air to raise the temperature of the outside air, It is possible to save energy and prevent cold draft.

That is, the heat exchanging unit 30 according to the present embodiment serves to recover the waste heat from the exhausted air and supply the waste heat to the outside air. Thus, the ventilator according to the present embodiment, which further includes the heat exchanging unit 30, 'Non-motorized waste heat recovery type ventilation system'.

The non-motorized waste heat recovery type ventilator according to the present embodiment is a ventilating facility using wind pressure around the building as a power source and recovering waste heat from the air discharged from the room to improve energy saving performance. Therefore, there is no noise (motor or fan noise) generated by the mechanical ventilation equipment, and it is possible to construct the ventilation equipment by using the ducts or using the short-length ducts of about 1m, It is possible to eliminate the concern of secondary pollution.

As described above, the ventilator according to the present embodiment includes an outside air supply and exhaust unit 10 for introducing and discharging outside air by using external air pressure, An indoor air supply / discharge unit 20 which is used in combination with a heat exchange unit 30 for recovering waste heat from the exhaust.

This non-motorized waste heat recovery type ventilation system can be installed to ventilate buildings such as high-rise apartments, small and medium office buildings, underground spaces of office buildings, underground tunnels in the city, etc., and is a new concept product of non- You can create a market.

This ventilation system, which has the advantages of non-motor power, waste heat recovery type and duct contamination irrigation, can be applied not only in Korea but also in the world market. By applying the same principle to the ventilation system of various buildings and tunnels, Thereby contributing to the activation of the facility market.

2, air is introduced into the space between the outdoor air supply / discharge unit 10 (the pair of air openings 12 and 14) and the heat exchange unit 30 through the air filter 32 for purifying air, So that dust or contaminants contained in the filter can be filtered.

Likewise, dust and contaminants contained in the air exhausted through the air filter 32 for purifying the air are also supplied to the space between the indoor air supply / discharge unit 20 (the pair of diffusers 22 and 24) and the heat exchange unit 30 It is also possible to filter the heat exchanger.

As described above, the non-powered waste heat recovery type ventilator according to the present embodiment is an energy saving system capable of recovering waste heat while natural ventilation is performed by wind pressure around the building.

The heat exchange unit (30) of the non-powered waste heat recovery type ventilator not only can save energy by recovering waste heat in winter, but also raises the temperature of the cold inflow outdoor air, thereby being effective for prevention of cold draft.

The indoor air supply and exhaust unit 20 according to the present embodiment includes a pair of diffusers 22 and 24 that respectively supply and exhaust air. The pair of diffusers 22 and 24 are connected to a separate device (E.g., the first diffuser 22) and the other part (for example, the second diffuser 24) may be configured to take charge of the exhaust .

That is, the first diffuser 22 and the second diffuser 24 according to the present embodiment are integrated in one indoor air supply and exhaust unit 20, and a part of the indoor air supply and exhaust unit 20 is connected to a diffuser And the other part can be used as a diffuser which functions as an exhaust port.

3 is a state view showing a state in which a ventilation device for non-motorized waste heat recovery is installed according to an embodiment of the present invention. 3, the enclosure 3, the semi-enclosed space 5, the ceiling finish 7, the outside air supply and exhaust unit 10, the air vents 12 and 14, the indoor air supply and exhaust unit 20, 24, a heat exchange unit 30, and an air filter 32 are shown.

The ventilator according to the present embodiment can be installed in the ceiling portion of the building, that is, in the semi-insulating space 5, so that the introduction of the outside air can be smooth and the installation space can be saved.

That is, as shown in Fig. 3, when the semi-insulating space 5 is secured in the ceiling portion of the building and the semi-insulating space 5 is partitioned from the indoor space by the ceiling finish 7, The exhaust unit 10 (a pair of air vents 12 and 14) is installed so as to pass through the outer casing 3 of the building and open to the semi-insulating space 5, 30 are installed in the semi-insulating space 5 and the indoor air supply and exhaust unit 20 (a pair of diffusers 22, 24) connected to the heat exchange unit 30 is exposed through the ceiling finish 7 to the indoor side Can be installed.

The outside air introduced from outside the room is supplied to the room through the diffuser after passing through the heat exchange unit 30 in the semi-insulating space 5 and the air exhausted from the room is passed through the heat exchange unit 30 in the semi- And then discharged to the outside through a rear vent.

Heat exchange is performed between the outside air introduced in this process and the room air to be discharged, and waste heat recovery from the exhaust to the supply air becomes possible.

In addition, by installing the ventilator according to the present embodiment in the semi-insulating space 5 near the outer wall, indoor and outdoor ventilation can be performed non-powered without using a separate power source, thereby realizing energy saving.

Furthermore, the ventilation device can be installed by omitting the duct or using only a short-length duct, so that the duct can be easily cleaned and the ventilation device can be easily maintained. That is, when the ventilation hole and the diffuser are connected by a duct, the length of the duct can be formed to be short enough to be easily cleaned by a person.

Each component of the ventilator according to the present embodiment is provided with an air supply / discharge diffuser (indoor air supply / exhaust unit 20) installed therein for maintenance of replacement of the air filter and cleaning of the heat exchange unit through openings formed in the ceiling, In order to facilitate such maintenance, the entire system can be configured as a one-letter type as shown in FIG.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. And changes may be made without departing from the spirit and scope of the invention.

3: envelope 5: half space
7: ceiling finish 10: outside air supply and exhaust unit
12, 14: Vents 20: Indoor air supply / exhaust unit
22, 24: diffuser 30: heat exchange unit
32: Air filter

Claims (8)

A first air vent which is installed through the outer surface of the building;
A second vent hole provided adjacent to the first vent hole to penetrate the outer surface of the building;
A first diffuser installed in a room of the building and connected to one end of the first ventilation hole;
And a second diffuser installed in a room of the building and connected to one end of the second ventilation hole,
Wherein the other end of the first vent is protruded from an outer surface of the building and is opened toward a first direction corresponding to a wind direction of the wind along the outer surface,
The other end of the second vent hole projects from the outer surface of the building and opens toward a second direction opposite to the first direction,
The other end of the first ventilation hole and the other end of the second ventilation hole are protruded by a predetermined distance from the outer surface of the building and are bent so as to be opposite to each other,
Wherein one of the first and second vents functions as a power supply mechanism by a positive pressure when a wind is blown along the outer surface of the building and the first vent and the second vent The other one of the vents functions as an exhaust port by negative pressure,
The first diffuser functions as an air supply mechanism for supplying the introduced outside air to the room, and the second diffuser functions as an air outlet for discharging the indoor air to the outside when the first air port functions as the air supply mechanism, Wherein the first diffuser functions as an exhaust port and the second diffuser functions as an air supply mechanism when the first diffuser functions as an exhaust port.
delete The method according to claim 1,
Wherein the first diffuser and the second diffuser are integrated in one indoor air supply and exhaust unit and a part of the indoor air supply and exhaust unit functions as the first diffuser and the other part of the indoor air supply and exhaust unit functions as the second diffuser Wherein the ventilation system is a ventilation system.
The method according to claim 1,
A heat exchange unit is interposed between the first and second vents, and between the first diffuser and the second diffuser,
Wherein heat exchange is performed between the air flowing through the first vent and the first diffuser, and air flowing through the second vent and the second diffuser in the heat exchange unit.
5. The method of claim 4,
And an air filter is interposed between the first and second vents and the heat exchange unit.
5. The method of claim 4,
The building is provided with a semi-cylindrical space defined by a ceiling finish, the heat exchange unit is installed in the semi-cylindrical space, and the first diffuser and the second diffuser are installed to be exposed toward the room through the ceiling finish Of the waste heat recovery type.
The method according to claim 6,
And the maintenance of the heat exchange unit is possible through the first diffuser and the second diffuser.
The method according to claim 1,
The first vent and the first diffuser are connected to a first duct, the second vent and the second diffuser are connected to a second duct, and the first duct and the second duct can facilitate cleaning And the length of the ventilator is short.

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