KR101851372B1 - Energy saving air handling unit and control method thereof - Google Patents

Abstract

[0001] The present invention relates to an energy saving type air conditioner and a control method thereof capable of performing various climate coordination, and an object of the present invention is to provide an energy saving type air conditioner capable of providing more detailed air conditioning control, An air conditioner and a control method thereof. To this end, the present invention relates to a case having a multi-layer structure, in which an exhaust chamber and an outside air chamber are formed in an upper layer portion, and a circulating air chamber and a supply air chamber are formed in a lower layer portion; An indirect evaporative cooler installed inside the case to be connected to the exhaust chamber, the outside air chamber, the circulating air chamber, and the supply air chamber to induce heat exchange between the circulating air and the outside air; Temperature adjusting means provided in the supply air chamber; A humidifier installed in the supply air chamber; A first damper installed in the exhaust chamber for controlling the flow of air; A second damper installed on a partition wall dividing the exhaust chamber and the circulating air chamber and controlling the flow of air; A third damper installed on a partition wall dividing the outside air chamber and the supply air chamber and disposed upstream of the air temperature adjusting means installed in the supply air chamber for interrupting the flow of air; A fourth damper installed on a partition wall dividing the outside air chamber and the supply air chamber and disposed downstream of the air temperature adjusting means installed in the supply air chamber for interrupting the flow of air; And a controller including a stepwise control function for controlling the indirect evaporative cooler, the temperature control means, the humidifier, and the first, second, third, and fourth dampers, Thereby providing an energy saving type air conditioner capable of providing various kinds of conditions.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an energy saving air conditioner,

The present invention relates to an energy saving type air conditioner and a control method thereof, and more particularly, to an energy saving type air conditioner and a control method thereof. More particularly, The present invention relates to an air conditioner and a control method thereof.

BACKGROUND ART [0002] Generally, an air conditioner is a device that keeps indoor air in a pleasant state. The indoor air is adjusted to a preset temperature and humidity, and the fresh air outside the room is introduced into the indoor space while discharging contaminated air to the outside Lt; / RTI >

Such an air conditioner consumes a large amount of energy to regulate the temperature and humidity of the air. Therefore, it is possible to reduce the energy of the exhaust air by regulating the temperature of the circulating air through the heat exchange with the outside air Type air conditioner is used.

[0004] FIG. 1 is a structural view of the air conditioner, and FIG. 2 is a diagram illustrating a humidifier diagram illustrating an operation mode of the air conditioner according to the first embodiment of the present invention. Respectively.

The air conditioner includes an indirect evaporative cooler (10) having a plurality of first channels through which outside air and water pass, and a plurality of second channels through which ventilation passes in a direction intersecting the first channel by 90 degrees, And one of the four operation modes is selected and operated in accordance with the situation.

For reference, A is a part of winter or spring and autumn, B is part of spring, autumn and summer, C is the most suitable area for indoor temperature and humidity, and D is a mode of operation for hot and humid summer.

However, when the four seasons are clear as in Korea, the annual average temperature rises up to 29.5 ° C at -6.1 ° C and the humidity increases from 50% to 85%. Therefore, the four modes of operation alone can not achieve optimal air conditioning control depending on the situation have.

On the other hand, in the case of an ideal indirect evaporative cooler, the heat of the ventilation moves to the outside air and functions to lower the dry bulb temperature of the ventilation. When the dry bulb temperature of the outside air is higher than the dry bulb temperature of the ventilator, There is a problem that loss of efficiency occurs due to reverse heat transfer.

Registered Patent Publication No. 10-1609126 (Announced 2014.04.05)

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide an energy saving type air conditioner and a control method thereof, which are capable of air conditioning control, Method.

Another object of the present invention is to provide an indirect evaporative cooler having an indirect evaporation type cooler having an improved structure for preventing reverse heat transfer in which the amount of heat of the outside air is transferred from the circulating air to the circulating air, Saving air conditioner and a control method thereof.

It is another object of the present invention to provide an energy saving type air conditioner and a method of controlling the same that can rapidly improve the heat exchange efficiency between the outside air and the circulating air by rapidly lowering the dry bulb temperature of the outside air.

It is another object of the present invention to provide an energy saving type air conditioner and a control method thereof, which are capable of controlling the temperature and humidity of the outside air flowing into the air conditioner by using circulating air.

According to an aspect of the present invention, there is provided an exhaust gas purifying apparatus including an exhaust chamber and an outside air chamber formed at an upper portion thereof and a circulation air chamber and a supply air chamber formed at a lower portion thereof ; An indirect evaporative cooler installed inside the case to be connected to the exhaust chamber, the outside air chamber, the circulating air chamber, and the supply air chamber to induce heat exchange between the circulating air and the outside air; Temperature adjusting means provided in the supply air chamber; A humidifier installed in the supply air chamber; A first damper installed in the exhaust chamber for controlling the flow of air; A second damper installed on a partition wall dividing the exhaust chamber and the circulating air chamber and controlling the flow of air; A third damper installed on a partition wall dividing the outside air chamber and the supply air chamber and disposed upstream of the air temperature adjusting means installed in the supply air chamber for interrupting the flow of air; A fourth damper installed on a partition wall dividing the outside air chamber and the supply air chamber and disposed downstream of the air temperature adjusting means installed in the supply air chamber for interrupting the flow of air; And a controller including a stepwise control function for controlling the indirect evaporative cooler, the temperature control means, the humidifier, and the first, second, third, and fourth dampers, Thereby providing an energy saving type air conditioner capable of providing various kinds of conditions.

Meanwhile, in the energy saving type air conditioner capable of air conditioning according to circumstances, the stepwise control function of the controller includes a water injection device of the indirect evaporative cooling device, an air temperature control means, and a second and a third damper A first operation mode in which the first and fourth dampers are closed to discharge the circulated air through the exhaust chamber and all of the outside air is supplied as air conditioning air; The water jetting device and the air temperature adjusting means are stopped, the first, second and fourth dampers are closed while the humidifier is operated, the circulating air mixed with the outside air is humidified by opening only the third damper, A second mode of operation; A third operation mode for closing the first, second and fourth dampers while the water injection device, the air temperature control means and the humidifier are stopped, and only the third damper is opened to supply circulated air mixed with the outside air as air conditioning air; The water jetting device is operated, the first damper is opened while the air temperature control means and the humidifier are stopped, the circulating air heat exchanged with the outside air through the indirect evaporative cooling device is closed A fourth operation mode for supplying the air as the air conditioning air; The air damper is stopped, the first and second dampers are closed, the third damper is opened, and the circulating air mixed with the outside air is supplied to the air-conditioning air, 5 Operation mode; The first and fourth dampers are opened while the humidifier is stopped, the second and third dampers are closed, and the circulated air that is heat-exchanged with the outside air through the indirect evaporative cooler A sixth operation mode of supplying the air to the air-conditioning air, and circulating a part of the air-conditioning air to the outside-air chamber through the fourth damper; A second damper, and a third damper, wherein the first and second dampers are opened while the air blowing fan is installed in the exhaust chamber and the supply air chamber, And a seventh operation mode in which the dry bulb temperature of the circulated air mixed with the outside air is controlled through the temperature regulating means and then supplied as the air conditioning air.

Meanwhile, in the energy saving type air conditioner capable of air conditioning according to the circumstances, the indirect evaporative cooling device comprises: a water injection device; And a second channel through which the circulation air flowing into the circulation air chamber flows and heat exchange is performed with the outside air, and a second channel through which water discharged from the water injection device and the outside air flowing into the outside air chamber flows, The cooler body may further include a prechamber for lowering the dry bulb temperature of the outside air by contact between water and the outside air before heat exchange between the outside air and the circulating air.

Meanwhile, in the energy saving type air conditioner capable of air conditioning according to circumstances, the indirect evaporative cooling device may include a water injection device for spraying water in the form of mist.

Further, the present invention provides a control method for an energy saving type air conditioner, comprising: detecting a state of an outside air (S10); And operating the air conditioner in one of the first to seventh operation modes according to the state of the outdoor air detected in the step S10 (S20). The air conditioner according to claim 1, A control method of an air conditioner is provided.

According to the present invention, since the air conditioner can be operated under optimized conditions according to the state of the outside air, the energy consumed in the operation of the air conditioner can be reduced.

In addition, since the dry bulb temperature of the outside air flowing into the indirect evaporative cooler is heat exchanged with the circulating air in a state where the dry bulb temperature is lowered through the prechamber, reverse heat transfer in which the calorific value of the outside air in summer is relatively high, Is prevented from occurring.

In addition, there is an effect that the dry bulb temperature of the outside air can be easily lowered by spraying the water sprayed by the indirect evaporative cooler in a small particle state to increase the evaporative efficiency of water.

In addition, when the dry bulb temperature and humidity of the outside air are high, a part of the supply air of the supply air chamber is circulated to the outside air chamber to control the temperature and humidity of the outside air first and then heat exchange with the circulating air, There is an effect that can be.

1 is a structural view of a conventional air conditioner,
FIG. 2 is a view showing the operation mode of the conventional air conditioner,
3 is a structural view of an air conditioner according to a preferred embodiment of the present invention.
FIG. 4 is a structural view of an indirect evaporative cooler according to the present invention. FIG.
FIG. 5 is a graph showing the relationship between the first and second modes of operation according to the present invention,
6 is a structural view illustrating an operating state of the air conditioner in the first operation mode according to the present invention.
7 is a structural view illustrating an operating state of the air conditioner in the second operation mode according to the present invention;
8 is a structural view illustrating an operating state of the air conditioner in the third operation mode according to the present invention.
9 is a structural view illustrating an operating state of the air conditioner in the fourth operation mode according to the present invention.
10 is a structural view illustrating an operating state of the air conditioner in a fifth operation mode according to the present invention.
11 is a structural view illustrating an operating state of the air conditioner in the sixth operation mode according to the present invention.
12 is a structural view showing an operating state of the air conditioner in a seventh operation mode according to the present invention;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

FIG. 3 is a structural view of an air conditioner according to a preferred embodiment of the present invention, FIG. 4 is a structural view of an indirect evaporative cooling device according to the present invention, FIG. 5 is a schematic view of a first operation mode to a seventh operation mode FIG. 6 to FIG. 12 are structural diagrams showing the operation states of the air conditioner in the first operation mode to the seventh operation mode according to the present invention.

The air conditioner according to the present invention includes a case 110, an indirect evaporative cooler 120, a temperature control means 130, a humidifier 140, first, second, third and fourth dampers 151, 152, 153 and 154, .

The case 110 has a multilayer structure and includes an exhaust chamber 111 and an outside air chamber 112 formed at an upper portion thereof and a circulating air chamber 113 and a supply air chamber 114 formed at a lower portion thereof. An exhaust chamber 111 is located above the circulating air chamber 113 and is formed to be located at the upper portion of the supply air chamber 114 with the ambient air chamber 112. These chambers 151, 152, 153, .

The indirect evaporative cooler 120 is installed inside the case 110 so as to be connected to the exhaust chamber 111, the outside air chamber 112, the circulating air chamber 113 and the supply air chamber 114, The cooling unit 120 exchanges heat between the outside air flowing into the outside chamber 112 and the exhaust chamber 111 and the circulating air flowing into the circulating air chamber 113 and flowing into the supply air chamber 114.

The indirect evaporative cooler 120 according to a preferred embodiment of the present invention includes a water injector 121 and a cooler body 122.

The water injector 121 reduces the dry bulb temperature of the outside air through evaporation of water and is installed on the inflow side of the outside air from the upper part of the cooler body 122 to form the first channel 123 As shown in FIG.

Meanwhile, the water injection device 121 according to the preferred embodiment of the present invention includes a plurality of spray nozzles 1211 for spraying water in the form of mist, and is sprayed with a small particle size through a spray nozzle 1211 Water particles are evaporated more smoothly, so that the dry bulb temperature of the outside air can be lowered more effectively than in the prior art.

The cooler main body 122 includes a plurality of first channels 112 for connecting the outside air chamber 112 and the exhaust chamber 111 and forming a flow path for allowing outside air flowing into the outside air chamber 112 to move to the exhaust chamber 111, A plurality of circulating air chambers 123 connected to the circulating air chambers 113 and the supply air chambers 114 to form a flow path for allowing the circulating air flowing into the circulating air chambers 113 to move to the supply air chambers 114; A second channel 124 and a prechamber 125 formed on the inlet side of the first channel 123.

The first channel 123 and the second channel 124 form independent flow paths so that the outside air and the circulating air can flow without mixing, and the first and second channels 123 and 124 are formed adjacent to each other, And the circulation air is exchanged between the outdoor air flowing through the outdoor heat exchanger 124 and the outdoor air circulating air, and this configuration is the same as that of the conventional indirect evaporative cooling device.

In the case of the cooler main body 122 according to the present invention, the pre-chamber 125 further includes a pre-chamber 125, in which the outside air flowing into the cooler body 122 is filled with water before the heat exchange with the circulating air, And it is characterized in that the dry bulb temperature is lowered in contact with the water sprayed from the device 121. [

That is, the pre-chamber 125 is a space located on the inflow side of the first channel 123 and completely separated from the second channel 124. The pre-chamber 125 includes water sprayed from the water spray device 121, The outside air flowing into the cooler main body 122 comes into contact with the inside of the prechamber 125, thereby lowering the dry bulb temperature of the outside air, and then the outside air flows into the first channel 123 to perform heat exchange with the circulating air .

Therefore, it is possible to prevent the reverse heat transfer, in which the amount of heat of the outside air is transferred to the circulating air, from being generated when the outside air having a high temperature is introduced into the indirect evaporation type cooler 120 in a situation where the temperature of the outside air is relatively high, The heat exchange efficiency between the outside air and the circulating air can be improved by further lowering the dry bulb temperature of the outside air.

The temperature control means 130 is installed in the supply air chamber 114 to control the dry bulb temperature of the supply air and may be constituted by a coil through which a heating medium such as hot water or cold water flows.

The humidifier 140 is installed in the supply air chamber 114 to perform humidification of the air introduced into the supply air chamber 114.

The humidifier 140 may be a humidifier, such as a vaporizing humidifier, a spray humidifier, or a steam humidifier. The humidifier 140 is disposed downstream of the temperature controller 130 to finally humidify the humidifier 140.

The first damper 151 is installed inside the exhaust chamber 111 to control the flow of the outside air flowing into the exhaust chamber 111.

The second damper 152 is installed in the partition 110a formed in the case 110 so as to separate the exhaust chamber 111 from the circulating air chamber 113. The second damper 152 installed in the case 110 is connected to the controller The circulating air chamber 113 and the exhaust chamber 111 are connected to each other.

The third damper 153 and the fourth damper 154 are installed on the partition 110b formed inside the case 110 so as to separate the outside air chamber 112 and the supply air chamber 114, The air flow path formed between the outside air chamber 112 and the supply air chamber 114 is controlled in response to the control signal generated in the air supply chamber 114.

The third damper 153 is installed to be located at the front end of the temperature regulating means 130 on the basis of the flow direction of the air and the fourth damper 154 is disposed at the rear end of the temperature regulating means 130 Respectively.

The third damper 153 located at the front end of the temperature control means 130 is opened when the outside air flowing into the exhaust chamber 111 is to be used as the air conditioning air and the fourth damper 154 is opened And is opened when a part of the supply air is circulated to the exhaust chamber 111 to control the dry bulb temperature and humidity of the outside air in advance.

The controller 160 controls the indirect evaporative cooler 120, the temperature control unit 130, the humidifier 140 and the first, second, third and fourth dampers 151, 152, 153 and 154, And a step-by-step control function for operating the air conditioner separately.

On the other hand, the stepwise control function is constituted by the first to seventh operation modes, and these operation modes are selectively implemented corresponding to the state of the ambient air.

More specifically, in the first operation mode, when the outside air satisfies the following conditions (the 'A' region in FIG. 5), namely, the conditions of dry bulb temperature 18 to 27 ° C., dew point temperature 10 to 15 ° C. and relative humidity 60% In operation mode, the water injection device 121, the air temperature control means 130 and the humidifier 140 of the indirect evaporative cooler 120 are stopped and the second and third dampers 152 and 153 are opened And the first and fourth dampers 151 and 154 are closed.

In this first mode of operation, the circulating air flowing into the circulating air chamber 113 flows into the exhaust chamber 111 through the second damper 152 and is discharged as it is. Is introduced into the supply air chamber 114 through the third damper 153 and supplied as air conditioning air.

The second operation mode is an operation mode performed when the outside air satisfies the following condition (the 'B' region of FIG. 5), that is, the condition that the dry bulb temperature is not more than 20 ° C. and the relative humidity is not more than 60% 121 and the air temperature regulating means 130 are stopped and the humidifier 140 is operated and the first, second and fourth dampers 151, 152 and 154 are closed and only the third damper 153 is opened.

In this second mode of operation, the circulating air flowing into the circulating air chamber 113 flows into the supply air chamber 114 through the second channel 124 formed in the indirect evaporative cooler 120, The outside air flowing into the supply air chamber 114 flows into the supply air chamber 114 through the third damper 153. The circulating air and the outside air introduced into the supply air chamber 114 are mixed with each other, Is humidified and then supplied as air conditioning air.

The third operation mode is an operation mode that is performed when the outside air satisfies the following condition (the 'C' region of FIG. 5), that is, the condition that the dry bulb temperature is not more than 20 ° C and the relative humidity is not less than 60% The air temperature regulating means 130 and the humidifier 140 are stopped and the first, second and fourth dampers 151, 152 and 154 are closed and only the third damper 153 is opened.

In this third mode of operation, the circulating air flowing into the circulating air chamber 113 flows into the supply air chamber 114 through the second channel 124 formed in the indirect evaporative cooler 120, The outside air flowing into the supply air chamber 114 flows into the supply air chamber 114 through the third damper 153 and circulated air mixed with the outside air is supplied as the air conditioning air.

The fourth operation mode is an operation mode performed when the outside air satisfies the following conditions (the 'D' region of FIG. 5), that is, a dry bulb temperature of 20 to 27 ° C. and an enthalpy of 18 kcal / kg or less. The air damper 130 and the humidifier 140 are stopped and the first damper 151 is opened and the second, third and fourth dampers 152, 153 and 154 are closed do.

In this fourth mode of operation, heat exchange between the circulating air flowing into the circulating air chamber 113 and the outside air flowing into the exhaust chamber 111 is performed in the indirect evaporative cooler 120, and the circulating air connected to the outside air And supplied as air conditioning air.

The fifth operation mode is an operation mode performed when the outside air satisfies the following conditions (the 'E' region in FIG. 5), that is, the dry bulb temperature is 20 ° C or more, and the enthalpy is 13 kcal / kg or less) The air damper 151 and the humidifier 140 are stopped and the air temperature adjusting means 130 is operated to close the first, second and fourth dampers 151, 152 and 154 and only the third damper 153 do.

The circulating air flowing into the circulating air chamber 113 flows into the supply air chamber 114 through the second channel 124 of the indirect evaporative cooler 120 and flows into the third damper 153 And the temperature is adjusted through the temperature regulating means 130 and then supplied as the air conditioning air.

The sixth operation mode is an operation mode that is executed when the outside air satisfies the following condition (the 'F' region of FIG. 5), that is, the condition that the dry bulb temperature is 27 ° C. or more and the enthalpy is 18 kcal / kg or less. The first and second dampers 121 and 121 and the air temperature adjusting means 130 are operated to stop the humidifier 140 and the first and fourth dampers 151 and 154 and to close the second and third dampers 152 and 153 .

In the sixth operation mode, the circulating air flowing into the circulating air chamber 113 is heat-exchanged with the outside air while being placed in the indirect evaporative cooling unit 120, and the temperature adjusting means 130 installed in the supply air chamber 114 And a part of the air-conditioned air is introduced into the outside-air chamber 112 through the fourth damper 154. The air-

The seventh operation mode is an operation mode that is executed when the outside air satisfies the following condition (the 'G' region of FIG. 5), that is, the condition that the dry bulb temperature is 27 ° C. or more and the enthalpy is 18 kcal / kg or more. Second and fourth dampers 151, 152 and 154 are closed and the third damper 153 is opened while the supply air chamber 114 (114) and the humidifier 140 are stopped, the temperature control means 130 is operated, And the blowing fan 171 installed in the blower fan 171 is controlled at the maximum speed.

In this seventh mode of operation, the circulating air flowing into the supply air chamber 114 through the indirect evaporative cooler 120 is mixed with the outside air flowing through the third damper 153, and then the temperature regulating means 130 The temperature is adjusted and then supplied as air conditioning air.

A method of controlling an energy saving type air conditioner according to the present invention, which is implemented by the air conditioner configured as described above, includes the steps of: (S10) detecting a state of an outside air; And operating the air conditioner in one of the first to seventh operating modes (S20).

In step S10, the temperature and humidity of the outside air flowing into the outside air chamber 112 or the outside air outside the case 110 are measured.

In step S20, the controller 160 receives the measured value in step S10 and determines the state of the outdoor unit. In step S20, the control unit 160 selects one of the first to seventh operation modes, .

As described above, the energy saving type air conditioner capable of air conditioning according to the present invention and the control method thereof can realize more optimized air conditioning in the state of the outside air including the 7-step operation mode according to the state of the outside air .

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.

Description of the Related Art
110: Case 111: Exhaust chamber
112: outside chamber 113: circulating air chamber
114: feed air chamber 120: indirect evaporative cooler
121: Water injector 122: Cooler body
123: first channel 124: second channel
125: prechamber 130: temperature adjusting means
140: Humidifier 151: First damper
152: second damper 153: third damper
154: fourth damper 160: controller
171: blowing fan

Claims (5)

A case having a multi-layer structure in which an exhaust chamber and an external air chamber are formed in an upper layer portion, and a circulating air chamber and a supply air chamber are formed in a lower layer portion;
An indirect evaporative cooler installed inside the case to be connected to the exhaust chamber, the outside air chamber, the circulating air chamber, and the supply air chamber to induce heat exchange between the circulating air and the outside air;
Temperature adjusting means provided in the supply air chamber;
A humidifier installed in the supply air chamber;
A first damper installed in the exhaust chamber for controlling the flow of air;
A second damper installed on a partition wall dividing the exhaust chamber and the circulating air chamber and controlling the flow of air;
A third damper installed on a partition wall dividing the outside air chamber and the supply air chamber and disposed upstream of the air temperature adjusting means installed in the supply air chamber for interrupting the flow of air;
A fourth damper installed on a partition wall dividing the outside air chamber and the supply air chamber and disposed downstream of the air temperature adjusting means installed in the supply air chamber for interrupting the flow of air; And
A controller for controlling the indirect evaporative cooler, the temperature control means, the humidifier, and the first, second, third and fourth dampers, and a stepwise control function for controlling the multi-stage control according to the state of the outside air Energy-saving air conditioner capable of coordination according to circumstances. The method according to claim 1,
The stepwise control function of the controller,
The second and third dampers are opened while the water injection device and the air temperature control means of the indirect evaporative cooler and the humidifier are stopped, the first and fourth dampers are closed to discharge the circulated air through the exhaust chamber, A first operation mode for supplying all of the air as air conditioning air;
The water jetting device and the air temperature adjusting means are stopped, the first, second and fourth dampers are closed while the humidifier is operated, the circulating air mixed with the outside air is humidified by opening only the third damper, A second mode of operation;
A third operation mode for closing the first, second and fourth dampers while the water injection device, the air temperature control means and the humidifier are stopped, and only the third damper is opened to supply circulated air mixed with the outside air as air conditioning air;
The water jetting device is operated, the first damper is opened while the air temperature control means and the humidifier are stopped, the circulating air heat exchanged with the outside air through the indirect evaporative cooling device is closed A fourth operation mode for supplying the air as the air conditioning air;
The air damper is stopped, the first and second dampers are closed, the third damper is opened, and the circulating air mixed with the outside air is supplied to the air-conditioning air, 5 Operation mode;
The first and fourth dampers are opened while the humidifier is stopped, the second and third dampers are closed, and the circulated air that is heat-exchanged with the outside air through the indirect evaporative cooler A sixth operation mode of supplying the air to the air-conditioning air, and circulating a part of the air-conditioning air to the outside-air chamber through the fourth damper; And
The first and second dampers are closed while the water injection device and the humidifier are stopped, the temperature control means is operated, the third damper is opened, and the blowing fan installed in the exhaust chamber and the supply air chamber is set to the maximum And a seventh operation mode in which the dry bulb temperature of the circulating air mixed with the outside air is controlled through the temperature control means and then supplied as the air conditioning air. The method according to claim 1,
Wherein the indirect evaporative cooler comprises:
Water injection device; And
A first channel through which the water injected from the water injector and the outside air flowing into the outside air chamber flows, and a second channel through which circulated air flowing into the circulating air chamber flows and heat exchange is performed with the outside air, And a cooler body,
Wherein the cooler body further comprises a prechamber for lowering the dry bulb temperature of the outside air by contact between water and the outside air prior to heat exchange between the outside air and the circulating air. The method according to claim 1,
Wherein the indirect evaporative cooler includes a water injector for spraying water in the form of mist. The control method of an energy saving type air conditioner according to claim 2,
Detecting a state of ambient air (S10); And
(S20) operating the air conditioner in one of the first to seventh operating modes according to the state of the outside air detected in the step S10. The air conditioner according to any one of the preceding claims, Control method of harmonics.

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