KR101863709B1 - Data center air-conditioning system - Google Patents

Abstract

The present invention provides an air-conditioning system for a data center. The air-conditioning system for a data center integrally employs a refrigerator, which is an auxiliary cooling device with a compression refrigeration cycle, in the system, assists cooling energy to air supply with a low static pressure cooling coil, controls the temperature of the air supply by indirect heat exchange between outdoor air and ventilation using an indirect heat exchanger, and indirectly cools the air supply with evaporative latent heat of water supply by spraying the water supply to the indirect heat exchanger. Accordingly, the air-conditioning system compared to the existing technology can be eco-friendly, can save energy for driving the refrigerator, and can increase the efficiency of the system in accordance with increase in vaporization efficiency since vaporization is hastened after the indirect heat exchanger is coated with an anti-corrosive epoxy on an aluminum thin plate and subjected to hydrophilic coating.

Description

Data center air-conditioning system

The present invention relates to a data center air conditioning system, and more particularly, to a data center air conditioning system that indirectly exchanges indoor air (RO) with outdoor air (OA) (RA) and the exhaust (EA), the latent heat cooling of the indirect heat exchanger, and the cooling of the air supply (SA) by the cooling coil are selectively carried out for each summer, and the temperature of the air supply (SA) To a data center air conditioning system in which the humidity is controlled to be at a set temperature and a humidity to maintain the data center room at constant temperature and humidity.

Typically, data centers lease computing and networking facilities to businesses and individuals, and provide services such as maintenance and maintenance by attracting customers' facilities. These data centers usually include data servers and databases, including communication devices. A plurality of racks are installed in a row and include a work space where workers can work.

On the other hand, since the apparatus including the above-described server rack is not smoothly operated at a high temperature and heat is generated during operation, the data center needs a cooling device for cooling it. Furthermore, in the case of electronic components and circuits, there is a risk of leakage of electric power if there is a large amount of moisture, and problems such as generation of static electricity, sparks, and fire or damage to electronic parts are likely to occur.

Therefore, in the data center, an air conditioner for cooling and constant temperature and humidity is installed. Examples of such technologies include Korean Patent Registration Nos. 10-0478755, 10-1103394, 10-2010-0013312, The technology for various air conditioners installed in the air conditioner has been disclosed.

However, in the conventional technology, in order to keep the data center at constant temperature and humidity, the outside air is supplied to the room by cooling or heating to the specified temperature, or the outside air and the ventilation are mixed with each other or the ventilation is cooled by the heat exchanger using the refrigerant Respectively.

However, the above-mentioned conventional technology has a problem in that the consumption of energy is increased to cool the outside air and the ventilation, and the ventilation to be converted into the air supply is contaminated by fine dust or the like.

The present invention is characterized in that a refrigerator which is a compression type refrigeration cycle auxiliary cooling device is integrally incorporated into a system, a low-pressure cooling coil assists the supply of cooling heat to an air supply, and indirect temperature exchange of air and ventilation using an indirect heat exchanger , The water is sprayed to the indirect heat exchanger to cool the supply air to the latent heat of evaporation of the water supply, so that it is more environmentally friendly than the conventional technology and energy for driving the refrigerator is saved, and the indirect heat exchanger has a hydrophilic And an object of the present invention is to provide a data center air conditioning system in which the efficiency of the system is increased due to the increase of the vaporization efficiency due to the promotion of vaporization of the water in the indirect heat exchanger when the indirect evaporation operation is performed as the coating is selectively performed.

The data center air conditioning system according to the present invention includes an outside air passage portion for introducing outside air through one side opened to the outside and guiding the introduced outside air to the other side and a ventilation portion for introducing ventilation through a side connected to the inside of the room, A ventilation passage portion for guiding from one side to the other side by the air blowing from the first blower; an indirect side connecting the other side of the ventilation passage portion to the other side of the outside air passage portion and making the indirect heat exchange with each other while passing outside air and ventilation in quadrature An exhaust passage portion for introducing the exhaust gas that has passed through the indirect heat exchanger and converted from the outside air into the exhaust gas through one side connected to the indirect heat exchanger and for guiding the introduced exhaust gas to the other side connected to the outside by the blowing of the second blower, And the supply air that has been converted from the ventilation to the air supply is passed through the indirect heat exchanger through one side connected to the indirect heat exchanger A condenser coil for condensing the refrigerant discharged from the inverter compressor by heat exchange between the condenser coil and the condenser coil, and a condenser coil for condensing the refrigerant discharged from the compressor compressor by heat exchange between the condenser coil and the condenser coil, And a cooling coil for cooling the supply air by heat exchange between the supply air while evaporating the refrigerant expanded in the expansion valve and selectively assisting the supply of cooling heat to the supply air, Opening and closing of the outside air passage portion, the ventilation passage portion, the exhaust passage portion and the air supply passage portion according to the temperature and humidity of the outside air, and the driving of the refrigerator and the heat exchanger cleaning means, And a control unit for selectively controlling the control unit.

The air supply passage according to the present invention is characterized in that the passage through which the air supply passing through the indirect heat exchanger is guided is divided into a first air supply passage and a second air supply passage and the first air supply passage is provided with a first air supply passage A first air supply damper and a second air supply damper for selectively opening and closing the second air supply passage are provided in the second air supply passage, and a cooling coil for selectively cooling the air supply flowing through the first air supply passage is provided Do.

The air supply passage portion according to the present invention is characterized in that the passage through which the air supply passed through the indirect heat exchanger is divided is divided into a first air supply passage and a second air supply passage and is provided at the inflow portion side of the first air supply passage, A first air supply damper selectively opening and closing the passage and a cooling coil of the refrigerator for selectively cooling an air supply flowing into the first air supply passage by opening the first air supply damper is disposed in front of the first air supply damper, A second condensing coil disposed downstream of the first air supply damper and selectively driven to dehumidify the air supply cooled by the cooling coil through the first air supply passage with the heat of condensation; And a second air supply damper provided on the second air supply passage for selectively opening and closing the second air supply passage.

The exhaust passage portion according to the present invention is characterized in that the passage through which the exhaust gas having passed through the indirect heat exchanger is guided is divided into a first exhaust passage and a second exhaust passage and is provided on the inlet portion side of the first exhaust passage, It is preferable that a condenser coil of the refrigerator for selectively condensing the refrigerant by heat exchange between the exhaust gas and the exhaust gas is disposed in the second exhaust passage.

And a humidifier provided in the air supply passage according to the present invention for selectively humidifying air supplied to the air supply.

In addition, the indirect heat exchanger according to the present invention includes diaphragms stacked on a plate at regular intervals, and a passage through which the upper and lower ends of the corrugations are joined to the diaphragm, A first member which receives the heat of the outside air as the outside air passes through the passage, and a second member which is made of a corrugation and which is arranged to cross the longitudinal direction of the first member between the stacked diaphragms, And a second member joined to the diaphragm to provide a passage through which the inner air passes and to receive heat of the inner air as the inner air passes through the passage, wherein the diaphragm, the first member and the second member The surface of the aluminum thin plate is coated with a corrosion-resistant epoxy and then coated with a hydrophilic coating so as to promote the vaporization of the water.

And a water supply nozzle provided at an upper portion of the indirect heat exchanger according to the present invention for selectively supplying water to the indirect heat exchanger so that the ambient air is cooled by the latent heat of evaporation of the water.

The heat exchanger cleaning means according to the present invention is connected to a water supply line for supplying water to the water supply nozzle and selectively supplies the cleaning liquid to the water supply line in accordance with the driving of the water supply nozzle, And the indirect heat exchanger is cleaned.

The data center air conditioning system according to an embodiment of the present invention has the following effects.

First, a refrigerator which is an auxiliary cooling device of compression type refrigeration cycle is integrally incorporated into the system, a low-pressure cooling coil assists the supply of cooling heat to the supply air, and the temperature of the supply air is controlled by indirect heat exchange between the outside air and the ventilation by using an indirect heat exchanger, Since the supply water is sprayed to the indirect heat exchanger to cool the supply air to the latent heat of evaporation of the feed water, it is more environmentally friendly than the conventional technology and has the effect of saving energy for driving the refrigerator.

Second, when the indirect heat exchanger is indirectly evaporated as the aluminum foil is selectively cleaned while being coated with hydrophilic coating after corrosion-resistant epoxy coating, the efficiency of the system is increased due to the increase of the vaporization efficiency of the indirect water heat exchanger It has an increasing effect.

1 is an exemplary diagram illustrating a data center air conditioning system in accordance with an embodiment of the present invention.
2 is a view illustrating an example of a heat exchanger cleaning unit of a data center air conditioning system according to an embodiment of the present invention.
FIG. 3 is a graph showing a data center air conditioning system according to an embodiment of the present invention, which is divided into air lines according to seasons.
FIG. 4 is an exemplary view showing the sensible heating and humidifying operation state of the data center air conditioning system in the winter season according to an embodiment of the present invention.
FIG. 5 is an exemplary diagram showing a sensible driving state of a data center air conditioning system in a vernalization period according to an embodiment of the present invention.
FIG. 6 is a diagram illustrating an indirect evaporative operation state of a data center air conditioning system in a snack according to an embodiment of the present invention. FIG.
FIG. 7 is an exemplary diagram illustrating the indirect evaporation of the data center air conditioning system and the operation of the freezer in the summer according to an embodiment of the present invention.
FIG. 8 is a diagram illustrating an indirect evaporation of a data center air conditioning system and a dehumidifying operation state using a cooling coil in a summer season according to an embodiment of the present invention.
FIG. 9 is a diagram illustrating an indirect evaporation of a data center air conditioning system and a dehumidifying operation state using a second condensing coil in a summer season according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately The present invention should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, at the time of the present application, It should be understood that variations can be made.

The present invention relates to a method and apparatus for indirectly exchanging indoor air (RO) with outdoor air (OA) and selectively ventilating (RA) and exhausting air (EA) according to the temperature of the outside air Indirectly evaporating the outside air by the latent heat of evaporation of the feed water and cooling the air supply (SA) by the cooling coil to adjust the temperature and humidity of the supply air (SA) The data center air conditioning system controls the humidity of the data center to be maintained at constant temperature and humidity, and will be described with reference to the drawings.

Referring to FIG. 1, the data center air conditioning system according to an embodiment of the present invention includes an outside air passage 100, a ventilation passage 200, an indirect heat exchanger 300, The refrigerator according to an embodiment of the present invention includes an inverter compressor 610 for selectively compressing a refrigerant with a compression type refrigeration cycle cooling apparatus, A condenser coil 620 for condensing the refrigerant discharged from the inverter compressor 610 by heat exchange with the exhaust gas, an expansion valve for selectively expanding the refrigerant condensed in the condenser coil 620, And a cooling coil 630 for cooling the supply air by heat exchange with the supply air while evaporating the refrigerant is selectively provided to assist the insufficient cooling heat of the supply air.

The outside air passage 100 according to an embodiment of the present invention provides a passage through which the outside air OA flows into the inside through the opened side.

At this time, the opening portion of the outside air passage portion 100 according to an embodiment of the present invention is formed at a lower portion of the apparatus, and when the outside air OA flows in the lower portion of the apparatus, the air is guided from one side of the inflow opening to the other side of the inflow opening, The outside air OA induced by the passage portion 100 is guided to the indirect heat exchanger 300.

The opening of the outside air passage 100 may include an outside air damper for opening and closing a passage through which the outside air OA flows if necessary, The direction of the air flow to the exhaust passage part 400 through the indirect heat exchanger 300 connected thereto can also be changed.

An outside temperature and humidity sensor (not shown) for measuring the temperature and humidity of the outside air OA is provided in the inside of the outside air passage portion 100 to measure the temperature and humidity of the outside air OA measured by the outside air temperature and humidity sensor Value is sent out to a control unit (not shown) for controlling each damper, a blower, a freezer, and the like.

One end of the ventilation passage 200 according to an embodiment of the present invention is connected to an air duct in the room and flows a return air (RA) .

At this time, the ventilation passage portion 200 guides the ventilation passage RA to the other side which is an outlet from one side of the inlet, the other side of the ventilation passage portion 200 is connected to the indirect heat exchanger 300, A first blower 210 is provided in the passage part 200 so as to forcibly blow the ventilating air RA introduced from one side to the other side and the blowing amount of the ventilating air RA is controlled by the temperature of the room, It can be selectively controlled according to the amount of heat generated in the server and the like.

A ventilation damper 220 is provided in front of the first blower 210 to selectively open and close the ventilation passage.

The other side of the outside air passage portion 100 is connected to the lower portion of the indirect heat exchanger 300 and the other side of the ventilation passage portion 200 is connected to one side of the indirect heat exchanger 300 , The indirect heat exchanger 300 causes the outside air OA and the ventilation RA to flow in an orthogonal cross flow so that the outside air OA and the ventilation RA indirectly exchange heat with each other.

Here, the indirect heat exchanger 300 according to an embodiment of the present invention will be described in more detail. The indirect heat exchanger 300 includes a partition plate 300 for indirectly exchanging heat with the outside air OA and the ventilation unit RA, A first member (not shown) for providing a flow path of the outside air OA and a second member (not shown) for providing a flow path of the ventilation RA, And has a structure of an indirect heat exchanger (300) in which a plurality of diaphragms are stacked at a predetermined distance from each other.

At this time, the first member and the second member are alternately arranged between the diaphragms stacked on each other to provide a flow path of the outside air (OA) and the ventilation (RA), respectively.

Here, the first member and the second member are corrugated, and the upper and lower ends thereof are joined to the diaphragm to form an outside air passage through which the outside air passes through the passage formed by the corrugation, and a ventilation passage through which the ventilation passes.

The first member and the second member are arranged so as to intersect each other in the longitudinal direction of the '+' shape so that the outside air OA and the ventilation air RA show a cross flow, The heat of the outside air OA and the ventilation RA is conducted to the diaphragm and the heat exchange between the outside air OA and the ventilation RA is performed through the diaphragm.

Here, the indirect heat exchanger 300 according to an embodiment of the present invention is provided with a hydrophilic coating surface. The hydrophilic coating surface is formed by a latent heat of vaporization of the water supply to increase the heat exchange efficiency between the outside air OA and the ventilation The diaphragm, the first member and the second member constituting the indirect heat exchanger 300 are formed of a thin aluminum plate. The surface of the thin aluminum plate is coated with an anti-corrosive epoxy and then hydrophilic coated to promote vaporization of the water supply. .

A water supply nozzle 310 is provided on the upper side of the indirect heat exchanger 300 to supply water to the indirect heat exchanger 300. The water supply nozzle 310 is connected to a water supply or water supply tank, And the water flowing along the water supply line is sprayed as a mist to the indirect heat exchanger 300 through the water supply nozzle 310 and passes through the outer air flow path of the indirect heat exchanger 300 The ambient air OA is cooled to a temperature lower than the point of time of sensible heat exchange with the ventilation (RA) by the latent heat of vaporization of the water supply. In the present invention, this is referred to as the indirect evaporation operation of the indirect heat exchanger 300.

Here, the water supply nozzle 310 is controlled in accordance with the temperature of the outside air OA. On the water supply line 311 of the water supply nozzle 310, a flow rate of water flowing along the water supply line 311 A solenoid valve 314 for selectively opening and closing the water supply line 311 and a solenoid valve 314 in the water supply line are provided in the order of the flow meter 312, the pressure reducing valve 313 for reducing the pressure of the water supply to a constant pressure, The heat exchanger cleaning means 320 is connected between the heat exchanger 310 and the heat exchanger 300. [

As shown in FIG. 2, the heat exchanger cleaning unit 320 selectively supplies the cleaning liquid to the water supply line, mixes the cleaning liquid with the water supply to clean the indirect heat exchanger 300, (320) includes a cleaning liquid supply line connected to the water supply line. On the cleaning liquid supply line, a cleaning liquid tank (321) containing a cleaning liquid, a strainer (322), and a solenoid metering pump A check valve 323 for preventing backflow, and a plurality of check valves 324 for preventing backflow.

Accordingly, when the indirect heat exchanger 300 is operated in the indirect evaporation operation, the heat exchanger cleaning unit 320 according to an embodiment of the present invention selectively supplies the cleaning liquid to the water supplied to the indirect heat exchanger 300, So that the indirect heat exchanger 300 is cleaned.

One end of the exhaust passage part 400 is connected to the upper part of the indirect heat exchanger 300. The exhaust passage part 400 passes through the indirect heat exchanger 300 and exchanges heat with the ventilation part RA, (EA) that has been converted from the exhaust gas (OA) to the exhaust gas (EA) to the other side and discharges the exhaust gas to the outside.

At this time, an exhaust damper 430 is provided in the opening of the exhaust passage 400 connected to the outside of the exhaust passage 400 to control the opening and closing of the exhaust passage EA. A second blower 440 And the exhaust EA that has been converted from the outside air OA to the exhaust air EA while passing through the indirect heat exchanger 300 is forcibly blown to the outside.

An inverter compressor 610 for compressing a refrigerant is disposed behind the second blower 440 and a second blower 440 of the exhaust passage part 400 is connected to the second blower 440 by the indirect heat exchanger 300 The amount of flow of the outside air OA flowing into the outside air passage 100 may be adjusted.

In addition, the exhaust passage part 400 according to the embodiment of the present invention is configured such that the passage through which the exhaust EA having passed through the indirect heat exchanger 300 is guided to the first exhaust passage 410 and the second exhaust passage The first exhaust damper 411 is provided in the first exhaust passage 410 so that the exhaust EA can be selectively discharged to the first exhaust passage 411 by opening and closing the first exhaust damper 411. [ 410 and is discharged to the outside.

The second exhaust passage 420 adjacent to the first exhaust passage 410 is provided with a condensing coil 620 for selectively condensing the refrigerant. The first exhaust damper 411 is connected to the first exhaust passage 420, The exhaust EA is guided along the second exhaust passage 420. When the exhaust EA passes through the condenser coil 620 provided in the second exhaust passage 420, , And the refrigerant is condensed by the heat exchange with the exhaust (EA).

In addition, a second exhaust damper (not shown) is further provided on the inflow side of the second exhaust passage 420 to selectively control the opening and closing of the second exhaust passage 420.

One side of the air supply passage 500 is connected to the other side of the indirect heat exchanger 300. The other side of the air supply passage 500 is connected to the indoor so that the outdoor air OA in the indirect heat exchanger 300, (SA) that is converted from the ventilation (RA) to the supply air (SA) by the heat exchange with the air supply (SA).

At this time, it is preferable that the other side of the air supply passage part 500 is connected to a duct for supplying air to the room, and the air supply passage part 500 according to an embodiment of the present invention is passed through the indirect heat exchanger 300 It is preferable that the passage through which a supply air (SA) is guided is partitioned into a first supply passage 510 and a second supply passage 520.

The first air supply damper 511 is provided in the first air supply passage 510 so that the first air supply damper 511 selectively opens and closes the first air supply passage 510 and the first air supply damper 511 selectively opens and closes the first air supply passage 510, The cooling coil 630 of the refrigerator is provided at an inlet end of the first air supply passage 510 to selectively cool the air supply SA flowing through the first air supply passage 510. When auxiliary cooling is not required, 520), thereby reducing power consumption of the blower.

A second condensing coil 512 is disposed behind the first air supply damper 511 to selectively cool the air supply passing through the first air supply passage 510 by being cooled by the cooling coil 630 .

The second air supply damper 521 is provided in the second air supply passage 520 so that the second air supply damper 521 selectively opens and closes the second air supply passage 520. In the first air supply damper 521, 511 and the second air supply damper 521 are preferably driven in opposite directions.

A humidifier 530 is provided in the air supply passage 500 so that the humidifier 530 selectively humidifies air supplied through the air supply passage 500.

In addition, an air supply temperature / humidity sensor (not shown) for measuring the temperature and humidity of the supply air (SA) supplied to the room is provided in the air supply passage unit (500) Is sent to a control unit (not shown).

The data center air conditioning system according to the present invention includes a control unit (not shown) for controlling the system based on the values provided by the outside temperature and humidity sensor and the air supply temperature and humidity sensor, A sensible heat exchange operation in which the control unit performs heat exchange between the outside air OA and the ventilation RA with the indirect heat exchanger 300 based on the measurement value applied from the air supply temperature and humidity sensor, Indirectly evaporating the water to the indirect heat exchanger 300 by the water supply nozzle 310 so as to cool the air supply to the humidifying operation and the latent heat of evaporation, and circulating the refrigerant of the refrigerator to cool the first blower 210 And controls the ventilation damper 220, the first exhaust damper 411, the exhaust damper 430, the second blower 440, the first air supply damper 511, and the second air supply damper 521.

FIG. 3 is a graph showing the operation range of each part on the air line of the data center air conditioning system according to the embodiment of the present invention. The A range of the graph is a winter season, sensible heat exchange and humidification are performed, , Indirect evaporation takes place, and the C range of the graph is the summer season, indirect evaporation and refrigerator operation are performed.

A detailed description will now be made of the implementation of each part of the season by the control unit of the data center air conditioning system according to an embodiment of the present invention.

In the winter season, sensible heat exchange and humidification are performed. As shown in FIG. 4, since the temperature of the supply air (SA) can be controlled by heat exchange between the outside air OA and the ventilation air RA, The indoor heat exchanger 300 is connected to the outdoor heat exchanger 300 through the outdoor heat exchanger 300 and the outdoor heat exchanger 300. The indoor heat exchanger 300 is connected to the outdoor heat exchanger 300, The outside air OA and the ventilation air RA induced to the indoor heat exchanger 300 indirectly exchange heat with each other while passing through the indirect heat exchanger 300. [

At this time, the outside air (OA) is converted into the exhaust (EA) while absorbing the heat of the ventilation (RA), the air volume is changed according to the air supply temperature, the ventilation (RA) is converted into the air supply / RTI >

Here, when the supply air SA converted from the air supply (RA) to the supply air (SA) does not satisfy the set humidity, it is preferable that the humidifier 530 is selectively driven to humidify the supply air (SA) It is not necessary to further supplement the cooling air to the supply passage SA so that the supply air SA flowing into the supply passage portion 500 from the indirect heat exchanger 300 is supplied to the second supply passage 520 without the cooling coil 630 ). ≪ / RTI >

 At this time, the first air supply damper 511 of the first air supply passage 510 is closed and the second air supply damper 521 of the second air supply passage 520 is opened.

The exhaust EA which has been converted from the outside air OA to the exhaust EA while passing through the indirect heat exchanger 300 is discharged to the outside through the exhaust passage part 400. The exhaust EA then passes through the condenser coil 620, the exhaust EA is discharged to the outside through the first exhaust passage 410 in which the first exhaust damper 411 is opened.

When the temperature of the supply air (SA) can be adjusted within the set supply temperature (SA) by the sensible heat exchange only because the temperature of the outside air is relatively low during the snacking period,

5, when the temperature of the supply air (SA) can be controlled by only the heat exchange between the outside air OA and the ventilation air RA, the outside air passage portion 100 flows outside air OA from the outside, The indoor air is guided to the indirect heat exchanger 300 and the ventilation passage 200 introduces the ventilation RA from the room to the indirect heat exchanger 300 and the outdoor air introduced into the indirect heat exchanger 300 OA) and the ventilation (RA) indirectly exchange heat with each other while passing through the indirect heat exchanger (300).

At this time, the outside air OA is converted into the exhaust air EA while absorbing the heat of the air flow RA, and the second blower 440 is controlled according to the air supply temperature to vary the air flow rate. (SA) and supplied to the room.

Since it is not necessary to further supplement the cooling air to the supply air SA, the supply air SA flowing into the supply air passage part 500 from the indirect heat exchanger 300 is supplied to the second supply air passage (520). ≪ / RTI >

 At this time, the first air supply damper 511 of the first air supply passage 510 is closed and the second air supply damper 521 of the second air supply passage 520 is opened.

The exhaust EA which has been converted from the outside air OA to the exhaust EA while passing through the indirect heat exchanger 300 is discharged to the outside through the exhaust passage part 400. The exhaust EA then passes through the condenser coil The first exhaust damper 411 is opened and discharged to the outside through the first exhaust passage 410 because the exhaust EA does not need to pass through the first exhaust passage 420. [

In the case where indirect heat exchange is performed in the indirect heat exchanger 310 because the temperature of the supply air (SA) can not be controlled within the set supply temperature (SA) The outdoor air passage unit 100 introduces the outside air OA from the outside to the indirect heat exchanger 300 and the ventilation passage unit 200 introduces ventilation (RA) from the room, And the outside air OA and the ventilation air RA induced by the indirect heat exchanger 300 pass through the indirect heat exchanger 300 and exchange heat indirectly with each other.

At this time, the indirect heat exchanger (300) is caused to supply water to the indirect heat exchanger (300) through the water supply nozzle (310) so that the ambient air is cooled by the latent heat of evaporation of the water in the indirect heat exchanger (300) When the water is supplied to the heat exchanger 300, the heat exchanger cleaning unit 320 is also driven in units of time, and a predetermined amount of the cleaning liquid is included in the water supply, To be cleaned.

Here, the OA cooled by the latent heat of the water is converted into the exhaust air (EA) while absorbing the heat of the ventilation (RA), the air volume is changed according to the air supply temperature, and the ventilation (RA) The indoor heat exchanger 300 is supplied with water if the temperature of the air supply unit SA can not be matched with the set temperature by only the heat exchange between the outside air OA and the ventilation unit RA .

If the indirect supply heat is supplied to the indirect heat exchanger 300 through the water supply nozzle 310, the supply air SA is cooled by the latent heat of evaporation of the water supply. If the temperature of the supply air SA is adjusted to match the set temperature, It varies depending on the load.

Since it is not necessary to further supplement the cooling air to the supply air SA, the supply air SA flowing into the supply air passage part 500 from the indirect heat exchanger 300 is supplied to the second supply air passage (520). ≪ / RTI >

 At this time, the first air supply damper 511 of the first air supply passage 510 is closed and the second air supply damper 521 of the second air supply passage 520 is opened.

The exhaust EA which has been converted from the outside air OA to the exhaust EA while passing through the indirect heat exchanger 300 is discharged to the outside through the exhaust passage part 400. The exhaust EA then passes through the condenser coil The first exhaust damper 411 is opened and discharged to the outside through the first exhaust passage 410 because the exhaust EA does not need to pass through the first exhaust passage 420. [

In the summer, when the temperature of the supply air (SA) can be adjusted by only heat exchange between the outside air (OA) and the ventilation (RA) as shown in FIG. 7, the indirect water heat exchanger drives the water supply and the freezer. The indoor heat exchanger 100 introduces the outside air OA from the outside to the indirect heat exchanger 300 and the ventilation passage 200 introduces the ventilation RA from the room to the indoor heat exchanger 300, And the outside air OA and the ventilation air RA induced by the indirect heat exchanger 300 indirectly exchange heat with each other while passing through the indirect heat exchanger 300.

At this time, the indirect heat exchanger (300) is caused to supply water to the indirect heat exchanger (300) through the water supply nozzle (310) so that the ambient air is cooled by the latent heat of evaporation of the water in the indirect heat exchanger (300) When the water is supplied to the heat exchanger 300, the heat exchanger cleaning unit 320 is also driven in units of time, and a predetermined amount of the cleaning liquid is included in the water supply, To be cleaned.

Then, the outside air OA is converted into the exhaust air EA while absorbing the heat of the ventilation air RA, and the ventilation air RA is converted into the air supply SA while being deprived of heat and is supplied to the room.

In this summer, the first blower 210 and the second blower 440 are controlled to the maximum operation, the water supply is also controlled to the maximum operation, and when the supply of the air supply SA is further required, In order to further supplement the heat amount, the supply air (SA) introduced into the air supply passage part (500) in the indirect heat exchanger (300) is supplied to the room through the first air supply passage (510) provided with the cooling coil (630).

At this time, the first air supply damper 511 of the first air supply passage 510 is controlled to be opened and the second air supply damper 521 of the second air supply passage 520 is closed and the refrigerant of the refrigerator is circulated The refrigerant of the freezer is circulated to the inverter compressor 610, the condenser coil 620, the expansion valve, and the cooling coil 630 disposed in the first supply passage 510, which are disposed in the second exhaust passage 420 .

Here, the supply air (SA) supplied to the room through the first air supply passage (510) is heat-exchanged with the refrigerant that evaporates while passing through the cooling coil (630) .

Therefore, the supply air SA is controlled to a temperature corresponding to the set temperature by the re-cooling of the supply air SA through the cooling coil 630, and is supplied to the room.

The exhaust EA which has been converted from the outside air OA to the exhaust EA while passing through the indirect heat exchanger 300 is discharged to the outside through the exhaust passage part 400. The exhaust EA then passes through the condenser coil The first exhaust damper 411 is closed and the exhaust EA is discharged to the outside along the second exhaust passage 420 connected to the first exhaust passage 410 to pass through the first exhaust passage 420.

As the exhaust EA passes through the condensing coil 620, the refrigerant is condensed by heat exchange with the refrigerant flowing in the condensing coil 620.

8, the exhaust EA, which has been converted from the outside air OA to the exhaust EA while passing through the indirect heat exchanger 300 as shown in Fig. 8, The first exhaust damper 411 is opened to allow the exhaust EA to pass the condenser coil 620 and the first exhaust damper 411 together, The first exhaust passage EA is discharged to the outside along the first exhaust passage 410 and the second exhaust passage 420 connected to the first exhaust passage 410.

As the exhaust EA passes through the condenser coil 620, the refrigerant is condensed by the heat exchange with the refrigerant flowing in the condenser coil 620, and the first exhaust damper 411 is regulated for controlling the condensation pressure .

As shown in FIG. 9, when reheating is required for dehumidification of the air supply, reheating is performed through a second condensing coil 512 that receives the refrigerant from the refrigerator and condenses the refrigerant, and the indirect heat exchanger 300 The exhaust gas EA that has been converted from the ambient air OA to the exhaust gas EA while passing through the exhaust gas passage 400 is discharged to the outside because the exhaust gas EA does not need to pass through the condenser coil 620, The exhaust EA is opened by the first exhaust damper 411 and is discharged to the outside through the first exhaust passage 410.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100: Outer air passage part 200: Ventilation passage part
210: first blower 220: ventilation damper
300: indirect heat exchanger 310: water supply nozzle
320: Heat exchanger cleaning means 400:
410: first exhaust passage 411: first exhaust damper
420: second exhaust passage 430: exhaust damper
440: second blower 500: supply passage portion
510: first supply passage 511: first supply damper
512: second condensing coil 520: second supply passage
521: Second supply damper 530: Humidifier
610: inverter compressor 620: condensing coil
630: cooling coil

Claims (13)

An outside air passage portion for introducing the outside air through one side opened to the outside and guiding the introduced outside air to the other side;
A ventilation passage for introducing the ventilation through one side connected to the room and guiding the introduced ventilation from one side to the other side by blowing air of the first blower;
An indirect heat exchanger that connects the other side of the outside air passage portion and the other side of the ventilation passage portion so as to indirectly heat exchange each other while passing the outside air and the ventilation in an orthogonal manner;
An exhaust passage part for introducing the exhaust gas that has passed through the indirect heat exchanger and passed from the outside air to the exhaust through one side connected to the indirect heat exchanger and for guiding the introduced exhaust air to the other side connected to the outside by the blowing of the second blower;
An air supply passage for introducing the air supply which has been converted from the ventilation to the air supply through the indirect heat exchanger through one side connected to the indirect heat exchanger and for guiding the introduced air supply to the other side connected to the room;
A compressor for selectively compressing the refrigerant; a condenser coil for condensing the refrigerant discharged from the inverter compressor through heat exchange with the exhaust; an expansion valve for selectively expanding the refrigerant condensed in the condenser coil; And a cooling coil for cooling the supply air by heat exchange with the supply air while evaporating the refrigerant, wherein the refrigerator selectively assists the supply of cooling heat to the supply air;
A heat exchanger cleaning means for selectively cleaning said indirect heat exchanger; And
And a control unit for selectively controlling the opening and closing of the outside air passage portion, the ventilation passage portion, the exhaust passage portion and the air supply passage portion according to the temperature and the humidity of the outside air, and the driving of the refrigerator and the heat exchanger cleaning means, system.
The method according to claim 1,
The air supply passage
A passage through which the supply air passing through the indirect heat exchanger is guided is partitioned into a first supply passage and a second supply passage,
A first air supply damper provided on the inlet side of the first air supply passage and selectively opening and closing the first air supply passage;
Wherein a cooling coil of the refrigerator for selectively cooling an air supply flowing into the first air supply passage through the opening of the first air supply damper is disposed in front of the first air supply damper,
A second condenser coil disposed behind the first air supply damper and selectively driven to dehumidify the air supply cooled by the cooling coil through the first air supply passage with condensation heat;
And a second air supply damper provided on the inlet side of the second air supply passage for selectively opening and closing the second air supply passage.
The method according to claim 1,
The exhaust passage portion
A passage through which the exhaust gas having passed through the indirect heat exchanger is guided is divided into a first exhaust passage and a second exhaust passage,
A first exhaust damper provided on an inlet side of the first exhaust passage for selectively opening and closing the first exhaust passage;
And a condenser coil of the refrigerator for selectively condensing the refrigerant by heat exchange with the exhaust is disposed in the second exhaust passage.
The method according to claim 1,
And a humidifier provided in the air supply passage and selectively humidifying by spraying moisture onto the air supply.
The method according to claim 1,
The indirect heat exchanger
Diaphragms stacked on the plate at regular intervals;
The upper and lower portions of the corrugated sheet being joined to the diaphragm to provide a passage through which the outside air passes, 1 member;
And the upper and lower limits of the corrugation are joined to the diaphragm to provide a passage through which the vapors pass, And a second member that receives heat of the inner air as it passes through the second member,
Wherein the diaphragm, the first member and the second member are made of an aluminum thin plate, and the surface of the aluminum thin plate is coated with an anti-corrosive epoxy and then hydrophilic coated to promote vaporization of the water supply.
The method of claim 5,
And a water supply nozzle provided at an upper portion of the indirect heat exchanger for selectively supplying water to the indirect heat exchanger so that the ambient air is cooled by the latent heat of evaporation of the water.
The method of claim 6,
The heat exchanger cleaning means
And the cleaning liquid is supplied to the water supply line selectively according to the driving of the water supply nozzle and is sprayed to the indirect heat exchanger together with the water supply to clean the indirect heat exchanger. Data center air conditioning system.
The method according to any one of claims 1 to 7,
In the winter season,
The first air damper of the air supply passage portion is controlled to open and the first air supply damper of the air supply passage portion is closed and the second air supply damper is controlled to open, The second blower installed in the furnace portion selectively controls the blowing amount according to the temperature of the air supply. The second blower selectively controls the operation of the humidifier according to the humidity of the air supply while passing through the indirect heat exchanger, Data center air conditioning system.
The method according to any one of claims 1 to 7,
The control unit,
The first air damper of the air supply passage portion is controlled to open and the first air supply damper of the air supply passage portion is closed and the second air supply damper is controlled to open, And the second blower installed in the furnace portion performs proportional control for selectively varying the amount of blowing air according to the temperature of the air supply to provide the cooled air supply to the room while passing through the indirect heat exchanger.
The method according to any one of claims 1 to 7,
The control unit,
The first air damper of the air supply passage portion is controlled to open and the first air supply damper of the air supply passage portion is closed and the second air supply damper is controlled to open, The second blower installed in the furnace portion selectively controls the blowing amount depending on the temperature of the air supply. The second blower selectively controls the driving of the heat exchanger cleaning means while controlling the operation of the water supply nozzle so that the outside air is cooled by the latent heat of evaporation of the water supply. And indirectly evaporating the refrigerant while passing through the indirect heat exchanger to provide the cooled air supply to the room.
The method according to any one of claims 1 to 7,
The control unit, in the summer,
Wherein the exhaust damper of the exhaust passage portion is controlled to open and the first exhaust damper is closed to control opening of the first air supply damper of the air supply passage portion and closing of the second air supply damper, The first blower provided in the first blower and the exhaust passage is controlled to a maximum driving value and selectively controls the driving of the heat exchanger cleaning means while controlling the driving of the water supply nozzle so that the outside air is cooled by the latent heat of evaporation of the water, Wherein the indirect evaporator and the freezer are operated by controlling the driving and re-cooling the air supply passed through the indirect heat exchanger to the indoor by the cooling coil.
The method according to any one of claims 1 to 7,
The control unit, in the summer,
The first air damper of the air supply passage portion is controlled to open and the second air supply damper is closed to control the first air supply damper and the first air supply damper of the exhaust passage portion to control the opening and closing of the first air supply damper, The second blower installed in the furnace is controlled to a maximum driving value and selectively controls the driving of the heat exchanger cleaning means while controlling the driving of the water supply nozzle so that the ambient air is cooled by the latent heat of evaporation of the water supply, And indirectly evaporating the cooled air supplied to the indoor heat exchanger and re-cooling the air supply unit passed through the indirect heat exchanger with the cooling coil to provide the indoor air to the room.
The method according to any one of claims 1 to 7,
The control unit, in the summer,
Wherein the exhaust damper of the exhaust passage portion is controlled to open and the first exhaust damper is closed to control opening of the first air supply damper of the air supply passage portion and closing of the second air supply damper, The first blower provided in the first blower and the exhaust passage is controlled to a maximum driving value and selectively controls the driving of the heat exchanger cleaning means while controlling the driving of the water supply nozzle so that the outside air is cooled by the latent heat of evaporation of the water, The second condensing coil is dehumidified by the second condensing coil while the driving of the second condensing coil is controlled while the supply air passed through the indirect heat exchanger is re-cooled by the cooling coil, Data center air conditioning system.

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