KR101409785B1 - air conditioning apparatus including multi stage heat exchagers recovering exhausting heat - Google Patents

Abstract

The present invention relates to an air conditioning apparatus including multi-stage heat exchangers recovering exhaust heat. The air conditioning apparatus includes an exhaust chamber (10) having an air discharge blower (11) discharging the indoor air outwardly; a heat exchanging chamber (30) connected to the exhaust chamber (10) to heat exchange the exhaust air discharged from the indoor with the outdoor air fed to the indoor by a heat exchanger (20); a heat exchanging exhaust damper (35) provided at a connected portion between the exhaust chamber (10) and the heat exchanging chamber (30) to communicate or interrupt the heat exchanging chamber (30) and the exhaust chamber (10); an exhaust damper (15) provided at a connected portion between the exhaust chamber (10) and an air discharge path (16) to open or close the exhaust chamber (10); an air conditioning chamber (50) having a cooling and heating device (52) heating or cooling the outdoor air, and an air supply blower (51); a heat exchanging air supply damper (36) communicating or interrupting the heat exchanging chamber (30) and the air conditioning chamber (50); an air supply damper (55) opening or closing an air supply path (56); a re-air supply damper (40) connecting the air conditioning chamber (50) and the exhaust chamber (10); and a control unit (not illustrated) controlling the opening or closing of the heat exchanging exhaust damper (35), the heat exchanging air supply damper (36), the exhaust damper (15), the air supply damper (55), and the re-air supply damper (40). The air supply path and the air discharge path are straightened not to apply a load to the air discharge blower and the air supply blower, thereby smoothly carrying out the supply of air.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an air conditioner having multiple exhaust heat recovery heat exchangers,

More particularly, the present invention relates to an air conditioner in which an exhaust chamber and an exhaust passage are formed in a straight line and a ventilation chamber and an air supply passage are formed in a straight line so that the exhaust direction and the exhaust direction are not broken to a right angle or more, The present invention relates to an air conditioner equipped with an exhaust heat recovery heat exchanger, which is capable of increasing the air conditioning efficiency by reducing the loads of the exhaust blower and the air supply blower so as to prevent the vortex and the static pressure from being applied.

As human needs for industrial development and quality of life increase, the use of air conditioners is increasing in households and industries. An air conditioner is installed to keep the indoor air always pleasant and clean, and these air conditioners supply the inside air of the building by heating or cooling.

At this time, the air conditioner circulates inside the building and introduces fresh outside air while discharging a part of the returned air to the outside of the building. In this process, the heated or cooled air is discharged to the outside in order to maintain a comfortable indoor temperature, It is necessary to supply the heat to the outside air again or to re-cool the outside air, so that the energy can not be utilized reasonably.

To solve this problem, in order to replace the turbid air in the room with fresh outside air, the exhaust air discharged from the room to the outside and the outside air sucked into the room from outside the room are heat exchanged between the exhaust and the outside air through the heat exchanger Quot; air conditioner equipped with a multi-stage heat exchanger "is disclosed in Korean Patent No. 10-1118167 as shown in FIG.

This prior art air conditioner includes an indoor air suction chamber 1 in which a return fan 1d for sucking and exhausting indoor air and ventilating a part thereof is mounted; A first outside air damper 2c extending to the right side of the room air suction chamber 1 and blocking and passing outside air and a second outside air damper 2b interrupting and passing outside air sucked from the first heat exchanger 4, An air circulation chamber (2) provided with a damper (2d) and equipped with a filter (2a) for filtering the outside air to be sucked and a heat exchange coil (2b) for cooling and heating; And an air supply fan (3a) provided with an air supply fan (3a) for supplying outside air supplied from the air flow distribution chamber (2) to the room, and the air supply room An air conditioner in which air chambers (3) are arranged in a horizontal direction on a straight line is provided, and heat exchange is performed between the exhaust gas discharged from the indoor air suction chamber (1) and the outdoor air supplied from the outdoor air supply port A first heat exchanger (4) and a second heat exchanger (5) installed on the upper surface of the air conditioner so as to be laterally and laterally arranged; An outside air supply chamber (6) installed to supply outside air supplied from the outside air supply port (6a) to the outside air inlet (5a) of the first outside air damper (2c) and the second heat exchanger (5); An exhaust discharge chamber 5c installed on the outside air supply chamber 6 for discharging the air flowing out from the exhaust outlet 5b of the second heat exchanger 5 to the outside; A heat exchange outdoor air supply chamber (4b) provided on the air flow distribution chamber (2) for supplying outdoor air flowing out from the first outlet (4a) of the first heat exchanger (4) to the second outdoor air damper (2d); An exhaust circulation chamber 1e installed to introduce the exhaust gas discharged from the indoor air suction chamber 1 into the exhaust gas inlet 4c of the first heat exchanger 4; An outflow air circulation chamber 4f provided so as to allow the exhaust flowing out from the exhaust outlet 4d of the first heat exchanger 4 to flow into the exhaust inlet 5e of the second heat exchanger 5; And an outside air circulation chamber 5g provided to supply the air flowing out from the external air outlet 5f of the second heat exchanger 5 to the outside air inlet 4e of the first heat exchanger 4. [

The conventional air conditioner includes an indoor air suction chamber 1 having an exhaust outlet 1b for discharging indoor air on its upper surface, a filter 2a for filtering ambient air, a heat exchange coil (2) in which air is supplied from the air circulation chamber (2) and air supply rooms (3) for supplying outside air supplied from the air flow distribution chamber (2) to the room are arranged in a horizontal direction on a straight line, The first heat exchanger (4) and the second heat exchanger (5) are connected to the upper surface of the air conditioner by heat exchange between the exhaust gas discharged from the indoor air suction chamber (1) and the outdoor air supplied from the outdoor air supply port As shown in FIG.

The air conditioner according to the prior art has a problem in that the flow of air supply and exhaust is bent at a right angle or bent 180 degrees so that a vortex is generated or a static pressure is applied and a load is applied to the exhaust blower and the air supply blower, There is a problem in that it is not smooth.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide an exhaust heat recovery heat exchanger which straightens an air supply passage and an exhaust passage to prevent a load from being applied to an exhaust air blower and an air supply blower, Thereby providing a harmonizer.

Another object of the present invention is to provide an exhaust heat recovery heat exchanger which is capable of preventing the icing phenomenon by mixing exhaust air discharged from an indoor space into an air supply portion of a heat exchanger and mixing warm exhaust with a cold outside air, Lt; / RTI >

In order to achieve the above object, an air conditioner in which an exhaust heat recovery heat exchanger according to the present invention is installed in a multi-stage includes an exhaust chamber provided with an exhaust blower for exhausting indoor air to the outside and connected to an exhaust passage; A heat exchange chamber connected to the exhaust chamber for exchanging heat with outdoor air to be supplied to the room through a heat exchange device and discharging the exhaust gas to the outside; A heat exchange and exhaust damper installed at a connecting portion between the exhaust chamber and the heat exchange chamber and opened or closed; An exhaust damper installed at a connection portion between the exhaust chamber and the exhaust passage to block or open the exhaust chamber; An air conditioning room in which a cooling and heating device for heating or cooling outdoor air introduced from an air supply duct for sucking outside air and supplying the indoor air to the room is provided and an air supply blower is installed; A heat exchange supply damper installed at a connecting portion of the heat exchange chamber and opened or closed to allow the heat exchange chamber and the air conditioning chamber to communicate with each other or to close the heat exchange chamber; An air supply damper installed at a connection part between the air conditioning room and the air supply to shut off or open the air supply line; And a refueling damper connecting the air conditioning chamber and the exhaust chamber.

According to an embodiment of the present invention, when a predetermined temperature difference is detected by comparing the room temperature measurement value and the outdoor temperature measurement value, a control device for controlling the heat exchange of the heat energy included in the exhaust gas with the supply air using the heat exchange device And the like.

According to an embodiment of the present invention, the exhaust chamber and the exhaust passage are straightened and exhausted through the exhaust passage without changing the direction of the exhaust discharged from the exhaust chamber, and the air supply passage for sucking the outside air and supplying the room to the room, So that the direction of the air supply air supplied from the air supply duct is not changed and is supplied to the air conditioning room through the air supply duct,

A heat exchange chamber is provided between the exhaust passage and the air supply passage to discharge exhaust gas from the exhaust chamber to the heat exchange chamber during heat exchange and to supply air to the air conditioning chamber in the heat exchange chamber.

According to an embodiment of the present invention, an exhaust mixing damper is opened when a heat exchanger is used in cold winter by connecting a heat exchange chamber and an exhaust passage, and an exhaust mixing damper is provided at a connecting portion, so that warm exhaust is supplied to an air supply portion of a heat exchanger, And the hot exhaust is mixed to prevent the icing phenomenon.

According to an embodiment of the present invention, the heat exchange chamber is provided between the exhaust chamber and the air conditioning chamber, and between the exhaust passage and the air supply pipe, for sucking outside air and exchanging heat with indoor air discharged from the heat exchange device to the outside, Wherein the exhaust passage and the air supply passage are formed so as not to change at an angle of more than ± 45 degrees with respect to the exhaust passage and the air supply passage, So as not to change.

According to an embodiment of the present invention, the exhaust path and the supply path of a plurality of heat exchanging apparatuses provided in a multi-stage in the heat exchange chamber are configured not to change at an angle of more than ± 45 degrees with respect to the exhaust path and the air supply path.

According to an embodiment of the present invention, the re-supply damper is configured to be opened or closed under the control of the control device to supply the exhaust of the exhaust chamber to the air conditioning chamber, mix the supply and exhaust with a predetermined ratio, .

According to the present invention, a heat exchange chamber is provided on the right side of the air conditioner in which the exhaust air blower is installed and the air blower is installed, and between the exhaust air and the air supply. It is possible to prevent the load from being applied to the exhaust blower and the air supply blower so that the air supply can be smoothly performed.

1 is a longitudinal sectional view of an air conditioner equipped with a heat exchanger for recovering exhaust heat according to a conventional technique,
FIG. 2 is a longitudinal sectional view of an air conditioner having a multi-stage exhaust heat recovery heat exchanger according to the present invention,
FIG. 3 is an embodiment in which an exhaust mixing damper for connecting the heat exchanging chamber and the exhaust passage of the air conditioner in which the exhaust heat recovery heat exchanger according to the present invention is installed in multiple stages and supplying the exhaust to the air supply portion of the heat exchanger is installed.

While the present invention has been described with reference to particular embodiments, it is capable of being embodied in many different forms and is not limited to the embodiments set forth herein. Hereinafter, the present invention will be described with reference to the drawings.

Fig. 2 is a longitudinal sectional view of the air conditioner in which the exhaust heat recovery heat exchanger according to the present invention is mounted in multiple stages.

An air conditioner 100 having an exhaust heat recovery heat exchanger according to the present invention installed in a multi-stage includes an exhaust chamber 10 provided with an exhaust blower 11 for exhausting indoor air to the outside and connected to an exhaust passage 16; A heat exchange chamber (30) connected to the exhaust chamber (10) for exchanging the exhaust gas discharged from the room with the outside air supplied to the room through the heat exchange device (20) and discharging it to the outside; A heat exchange and exhaust damper 35 installed at a connection portion between the exhaust chamber 10 and the heat exchange chamber 30 and opened or closed by a control signal for connecting or disconnecting the heat exchange chamber 30 and the exhaust chamber 10; ; The exhaust chamber 10 is opened or closed by a control signal provided at a connection portion between the exhaust chamber 10 and the exhaust passage 16 and controlled or blocked by the heat exchange chamber 30 and the exhaust chamber 10 An exhaust damper 15; An air conditioning room (50) in which a cooling and heating device (52) for heating or cooling the outside air introduced from an air supply path (56) for sucking outside air and supplying the room to the room is installed and an air supply blower (51) is installed; Is opened or closed by a control signal provided at a connecting portion of the heat exchange chamber 30 and connected to the heat exchange chamber 30 and the air conditioning chamber 50 by a control signal for passing or blocking the heat exchange chamber 30 and the air conditioning chamber 50, A heat exchange supply damper (36) for closing the heat exchanger; An air supply damper (not shown) installed at a connection portion between the air conditioning chamber 50 and the air supply duct 56 for blocking or opening the air supply duct 56 by a control signal for connecting or disconnecting the heat exchange chamber 30 and the air conditioning chamber 50 55); A re-supply damper (40) connecting the air conditioning chamber (50) and the exhaust chamber (10); And a control device (not shown) for controlling the heat exchange and discharge damper 35, the heat exchange and supply damper 36, the exhaust damper 15, the air supply damper 55 and the re-supply damper 40 to be opened or closed.

 The exhaust chamber 10 according to the present invention is provided with an exhaust blower 11 for exhausting indoor air to the outside and connected to the exhaust passage 16 to the right side of the exhaust chamber 10 as shown, And the exhaust air blower 11 discharges the indoor air to the outside through the exhaust passage 16 which is straightened and ventilates.

 An exhaust damper 15 for opening and closing the exhaust passage 16 is provided at a portion connected to the exhaust passage 16 in the exhaust chamber 10 and the heat exchange chamber 30 is provided at the right side of the exhaust chamber 10, A heat exchange chamber 30 is connected to a connecting portion having the same area as the sectional area of the exhaust passage 16 and a heat exchange and exhaust damper 35 for opening and closing the heat exchange chamber 30 and the exhaust chamber 10 is provided at the connection portion.

Therefore, when it is necessary to heat exchange the room air exhausted through the exhaust chamber 10 and the exhaust passage 16 with the external air to be sucked (in a season where the temperature difference between the room temperature and the outside is large) The damper 35 is opened and the exhaust damper 15 is closed to exhaust the exhaust gas discharged from the room to the heat exchange chamber 30 to exchange heat with the external air sucked through the heat exchange unit 20. [

A heat exchange chamber 30 is disposed on the right side of the exhaust chamber 10 in which the exhaust blower 11 is installed and an exhaust passage 10 in which the exhaust chamber 10 and the heat exchange chamber 30 are straightened The air is exhausted to the heat exchange chamber 30 by the exhaust blower 11 and the indoor air is exchanged with the outside air by the heat exchanger 20 to be vented outside.

The heat exchange chamber 30 according to the present invention is connected to the exhaust chamber 10 and is configured to pass through the heat exchange device 20. The heat exchange chamber 30 is connected to the heat exchange chamber 30 through the exhaust chamber 10, (35).

When the exhaust damper 15 provided at the connection portion between the exhaust passage 16 and the exhaust chamber 10 is closed and the heat exchange and exhaust damper 35 is opened, the exhaust gas passing through the exhaust chamber 10 is exhausted to the exhaust passage 16 Exchanged with the outdoor heat exchanger (30) without passing through the heat exchanger (20), exchanges heat with the outside air supplied to the room while passing through the heat exchanger (20), and is discharged to the outside.

The heat exchange and exhaust damper 35 according to the present invention is automatically operated by the control of the control device when the indoor air to be exhausted needs to be heat-exchanged with the external air to be sucked (such as a season in which the temperature difference between the room temperature and the outside is large or nighttime) Closed or opened, and can operate in reverse or operate in conjunction with the exhaust damper 15 under the control of the control device.

That is, by the control of the control device, the heat exchange and exhaust damper 35 is closed and the exhaust damper 15 is opened without heat exchange, the heat exchange and exhaust damper 35 is opened and the exhaust damper 15 is closed and heat exchanged and exhausted , The heat exchanging exhaust damper (35) and the exhaust damper (15) are simultaneously opened, exhaust can be controlled simultaneously with the heat exchange without the heat exchange.

The heat exchange chamber 30 is installed on the right side of the exhaust chamber 10 and under the exhaust passage 10 to suck the outside air and exchange heat with the indoor air discharged from the heat exchange device 20 to the outside And is configured to be connected to the air conditioning room 50 so that the air supplied through the heat exchanging device 20 is heated or cooled in the air conditioning room 50.

The heat exchange chamber (30) communicates with the exhaust chamber (10) by opening the heat exchange and exhaust damper (35). The heat exchanger (20) installed in the heat exchange chamber (30) is installed to discharge the exhaust discharged from the exhaust chamber (10) by changing the temperature down to 45 degrees.

The exhaust gas flowing into the heat exchange chamber 30 passes through the first heat exchange device 21 at an angle of -45 ° to the exhaust path 16 and then passes upward through the second heat exchange device 22 in the + 45 ° direction upward .

Thus, the heat exchanger exhaust gas flows smoothly at an angle of more than + -45 degrees with the exhaust passage 16, and flows smoothly.

A heat exchange supply damper 36 for opening and closing the heat exchange chamber 30 is provided at a portion of the heat exchange chamber 30 connected to the air conditioning chamber 50. The heat exchange chamber 30 is connected to the right side of the air conditioning chamber 50 A heat exchange chamber 30 is connected to a connection portion having the same area as the cross sectional area of the heat exchange chamber 56 and a heat exchange supply damper 36 for opening and closing the heat exchange chamber 30 and the air conditioning chamber 50 is provided in the connection portion.

The air supplied into the heat exchange chamber 30 passes through the second heat exchange device 22 at an angle of + 45 ° to the air supply path 56 and then flows downwardly through the first heat exchange device 21 in the -45 ° direction .

Therefore, the flow of the heat-exchanging supply air flows smoothly at an angle of not less than ± 45 ° with the supply air passage 56, and flows smoothly.

A heat exchange supply damper 36 is provided at a portion connected to the heat exchange chamber 30 from the air conditioning chamber 50 and is opened or closed by a control signal of a control device for connecting or disconnecting the air conditioning chamber 50 and the heat exchange chamber 30, (50) and the heat exchange chamber (30).

When the air supply damper 55 installed at the connection portion between the air conditioning chamber 50 and the air supply path 56 is closed and the heat exchanging supply damper 36 is opened, the supply air supplied to the air conditioning chamber 50 is supplied to the heat exchanger 20 of the heat exchange chamber 30, The heat is exchanged with the exhaust gas discharged to the outside of the room, and the heat is recovered or the heat is taken away.

The heat-exchanging supply damper 36 according to the present invention is automatically closed or opened by the control of the control device, and can be operated in the opposite direction or in the same direction by interlocking with the air supply damper 55 under the control of the control device .

The heat exchanger / supply damper 36 is closed by the control of the control device, and if the supply damper 55 is opened, it is exhausted without heat exchange. Since heat exchange is performed between the exhaust gas and the air supply, heat exchange can not be performed unless the heat exchange / exhaust damper 35 is opened when the heat exchange / supply damper 36 is opened. Therefore, when the heat exchange / supply damper 36 is opened, 35 are also opened and the heat exchange and supply damper 36 is closed, the heat exchange and exhaust damper 35 is also closed together so that the supply and exhaust are interlocked with each other under the control of the control device.

 When the heat exchange and exhaust damper 35 and the heat exchange and supply damper 36 are opened at the same time and the exhaust damper 12 and the air supply damper 52 are closed, the exhaust gas discharged from the room is discharged through the heat exchanger 20 , The supply air supplied from the outside is heat-exchanged with the indoor exhaust through the heat exchanger 20 and is supplied to the room.

The re-supply damper 40 is connected to the exhaust chamber 10 and the air-conditioning chamber 50 in order to perform the process of recharging the exhaust gas, And the exhaust of the exhaust chamber 10 is supplied to the air conditioning chamber 50 by the control of the control device to exhaust the air supply and exhaust at a predetermined ratio, for example, at a ratio of 3: 1 Mix and feed into the room.

A room temperature sensor (not shown) for measuring the temperature of the room is installed in the room, an outdoor temperature sensor for measuring the outdoor temperature is installed outside (e.g., an outdoor unit) The indoor temperature measurement value and the outdoor temperature measurement value measured by the temperature sensor are inputted by the wireless communication method or the wired communication method.

The control device compares the indoor temperature measured value measured by the indoor temperature sensor and the outdoor temperature sensor with the outdoor temperature measured value and if the difference is greater than 5 ° C, for example, the heat exchanger 20 is used to supply the heat energy contained in the exhaust gas So that the heat energy contained in the exhaust gas is recovered.

That is, when the difference between the room temperature measurement value and the outdoor temperature measurement value is 5 ° C or more, the control device closes the exhaust damper 15 and opens the heat exchange and exhaust damper 35 to allow the exhaust gas to pass through the heat exchange device 20.

At the same time, the air supply damper 55 is closed and the heat exchanger / supply damper 36 is opened to supply air through the heat exchanger 20, so that the exhaust air and the air supply are heat-exchanged to absorb heat energy in the exhaust air and supplied to the air conditioning room 50.

At this time, the re-supply damper 40 is opened to supply a part of the exhausted air to the air-conditioning room 50 and mixed with the supply air to heat-exchange the exhaust air of the room air and the outdoor air supply to recover the exhaust heat and mix with the air supply, The cooling or heating heat applied to the cooling and heating device 52 can be reduced by supplying or removing the thermal energy to the air conditioning room 50 by raising or lowering the temperature.

FIG. 3 shows an embodiment in which an exhaust mixing damper for connecting the heat exchanging chamber and the exhaust passage of the air conditioner having the exhaust heat recovery heat exchanger according to the present invention in multiple stages and supplying the exhaust to the air supply portion of the heat exchanger is provided.

If the outdoor air and the exhaust are directly heat-exchanged at the outside air temperature of the sub-winter in winter, the condensed water vapor is frozen due to the low temperature at the air supply part of the heat exchanger 20,

As shown in FIG. 3, the heat exchange chamber 30 and the exhaust passage 16 are connected to each other to prevent the supply portion of the heat exchanger 20 from being blocked by the freezing phenomenon, The mixing damper 25 is installed to open the exhaust mixing damper 25 when the heat exchanger 20 is used in the cold winter so that the warm exhaust is supplied to the air supply portion of the heat exchanger 20 to mix the warm exhaust with the cold outside air, Thereby preventing the phenomenon.

It will be understood by those skilled 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 in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims as long as they are for the technical idea of forming.

10: exhaust chamber 11: exhaust blower
15: exhaust damper 16:
20: heat exchanger 25: exhaust mixing damper
30: heat exchange chamber 35: heat exchange exhaust damper 36: heat exchange supply damper 40: regenerator damper
50: air conditioning room 51: air blower
52: cooling and heating device 55: supply damper
56: by air supply 100: heat exchanger

Claims (7)

An exhaust chamber provided with an exhaust blower for exhausting indoor air to the outside and connected to an exhaust passage;
A heat exchange chamber connected to the exhaust chamber for exchanging heat with outdoor air to be supplied to the room through a heat exchange device and discharging the exhaust gas to the outside;
A heat exchange and exhaust damper installed at a connecting portion between the exhaust chamber and the heat exchange chamber and opened or closed;
An exhaust damper installed at a connection portion between the exhaust chamber and the exhaust passage to block or open the exhaust chamber;
An air conditioning room in which a cooling and heating device for heating or cooling outdoor air introduced from an air supply duct for sucking outside air and supplying the indoor air to the room is provided and an air supply blower is installed;
A heat exchange supply damper installed at a connecting portion of the heat exchange chamber and opened or closed to allow the heat exchange chamber and the air conditioning chamber to communicate with each other or to close the heat exchange chamber;
An air supply damper installed at a connection part between the air conditioning room and the air supply to shut off or open the air supply line;
And a refueling damper connecting the air conditioning chamber to the exhaust chamber. The air conditioner according to claim 1, wherein the exhaust heat recovery heat exchanger comprises: The method according to claim 1,
Further comprising a control device for controlling the heat exchange between the indoor temperature measurement value and the outdoor temperature measurement value so that the heat energy included in the exhaust gas is exchanged with the supply air by using the heat exchange device when a certain temperature difference is generated, An air conditioner equipped with multi-stage recovery heat exchanger. 3. The method according to claim 1 or 2,
Wherein the exhaust chamber and the exhaust passage are straightened so that the direction of the exhaust gas discharged from the exhaust chamber is not changed but exhausted through the exhaust passage and the outside air is sucked to supply the air to the room, and the air conditioning chamber is straightened, The air is supplied to the air conditioning room through the air supply passage without changing the direction of the air,
Wherein a heat exchange chamber is provided between the exhaust passage and the air supply passage to discharge exhaust gas from the exhaust chamber to the heat exchange chamber during heat exchange and to supply air to the air conditioning chamber in the heat exchange chamber. Air conditioner. 3. The method according to claim 1 or 2,
When the heat exchanger is used in cold winter, the exhaust mixing damper is opened to connect the heat exchanging chamber and the exhaust passage, and an exhaust mixing damper is installed at the connecting portion. The hot exhaust is supplied to the air supply portion of the heat exchanger, Wherein the exhaust heat recovery heat exchanger is mounted in a multi-stage structure. 3. The method according to claim 1 or 2,
The heat exchange chamber is disposed on the right side of the exhaust chamber and the air conditioning room and between the exhaust passage and the air supply. The air supply unit sucks the outside air and exchanges heat with room air discharged from the heat exchange unit to the outside, And the exhaust passage discharged from the room to the heat exchange chamber through the exhaust chamber does not change at an angle of more than ± 45 degrees with respect to the exhaust passage and the air supply passage. An air conditioner equipped with multi-stage exhaust heat recovery heat exchanger. 6. The method of claim 5,
Characterized in that the exhaust passage and the air supply passage of a plurality of heat exchanging apparatuses provided in multiple stages in the heat exchange chamber do not change at an angle of more than ± 45 degrees with respect to the exhaust passage and the air supply passage, Harmonics. 3. The method according to claim 1 or 2,
Wherein the regenerator damper is configured to be opened or closed under the control of the controller to supply the exhaust of the exhaust chamber to the air conditioning room to mix the air supply and exhaust with a predetermined ratio to supply the air to the room. Air conditioner.

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