KR101814074B1 - Air-conditioning system using the outside air cold water - Google Patents
Air-conditioning system using the outside air cold water Download PDFInfo
- Publication number
- KR101814074B1 KR101814074B1 KR1020150148643A KR20150148643A KR101814074B1 KR 101814074 B1 KR101814074 B1 KR 101814074B1 KR 1020150148643 A KR1020150148643 A KR 1020150148643A KR 20150148643 A KR20150148643 A KR 20150148643A KR 101814074 B1 KR101814074 B1 KR 101814074B1
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- South Korea
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- condenser
- cold water
- refrigerant
- circulation line
- cooling
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/0008—Control or safety arrangements for air-humidification
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- F24F11/0012—
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- F24F11/0015—
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
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- F24F3/161—
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/0017—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
- F24F2005/0025—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice using heat exchange fluid storage tanks
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Central Air Conditioning (AREA)
Abstract
The present invention relates to a refrigeration cycle in which a refrigerant is circulated along a first circulation line in the order of a first compressor, a first condenser, a first expansion valve, and a first evaporator, The second compressor, the second condenser, the second expansion valve, and the second evaporator in this order, while circulating the refrigerant along the second circulation line, the outside air having passed through the first evaporator of the first cooling portion is discharged to the second evaporator And a precooling unit for precooling the outside air before being drawn into the first evaporator of the first cooling unit by the cold water cooled by the heat exchange method so that the outside air passes through the cooling unit for cooling the outside air The cooling load of the air conditioning system is minimized and the cold water of the cooling tower is used as the energy source, And provides a constant temperature and humidity system using outside cold water which can actively operate according to the temperature of the outside air.
Description
The present invention relates to a constant temperature and humidity system for purifying outside air (outside air) and introducing outside air whose temperature, humidity, and air amount are controlled, and is characterized in that before being passed through a cooling unit for cooling outside air, The precooling unit using cold water precooled the outside air, then passed the outside air through the cooling unit, and selectively cooled the outside air to single or multi-stage according to the temperature of the precooled outside air. .
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 high temperature and generates heat 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 short circuit if there is a large amount of moisture in the data center, and problems such as generation of static electricity, sparks, and breakage of 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.
The conventional technology is to circulate the outdoor air to the data center by cooling or heating the outdoor air to the designated temperature to keep the data center at constant temperature and humidity or to mix the outdoor air and the indoor air or to cool the indoor air by the heat exchanger using the refrigerant .
As an example of a heat exchanger using a refrigerant, a gaseous refrigerant compressed at a high pressure in a compressor is condensed in a high-pressure liquid refrigerant by heat exchange with the outside air while passing through a condenser, and is then discharged through a expansion valve or capillary, Refrigerant.
The low-pressure sprayed refrigerant flows into the evaporator, is evaporated by heat exchange with the indoor air, and then flows into the compressor again. The cycle of the above-described process is circulated. At this time, the air cooled by the evaporation heat of the refrigerant generated in the evaporator is blown And is blown to a predetermined space to be cooled by the fan.
That is, such a general cooling system cools a predetermined space to be cooled by using a refrigerant whose phase change is easy, such as liquefaction and evaporation.
However, the conventional technology described above has a problem in that consumption of energy for cooling the outside air and the inside air is increased.
Therefore, the present invention precools the outside air before it is introduced into the first evaporator of the first cooling unit by using the cold water cooled by the heat exchanging method in the pre-cooling unit before passing the outside air to the cooling unit for cooling the outside air, The cooling load of the harmonic system is minimized and the foreign substances contained in the refrigerant discharged from the receiver to the expansion valve are removed through the dryer and the state of the high pressure high temperature refrigerant flowing along the circulation line through the sight glass is visually confirmed The present invention aims to provide a constant temperature and humidity system using external cold water capable of efficiently operating and capable of actively coping.
The constant temperature and humidity system using external cold water according to the present invention circulates a refrigerant along a first circulation line in the order of a first compressor, a first condenser, a first expansion valve, and a first evaporator, A second condenser, a second expansion valve, and a second evaporator in this order, while circulating the refrigerant in the order of the second compressor, the second condenser, the second expansion valve, and the second evaporator, And a second cooling section that selectively cools outside air passing through the second evaporator through a second evaporator, wherein the second cooling section is disposed on a first circulation line between the first condenser and the first expansion valve of the first cooling section, A first side for providing a flow path through which the refrigerant is directly bypassed from the first compressor to the first receiver; and a second side disposed on the first side, Through the first circulation line, The refrigerant pressure at the outlet side of the first condenser circulating from the condenser to the first receiver is compared with the refrigerant pressure at the inlet side of the first condenser which is circulated from the first compressor to the first condenser, A first differential pressure valve for bypassing a part of the refrigerant from the first condenser to the first condenser outlet side through the first side line to adjust the pressure of the refrigerant at the outlet side of the first condenser which is circulated from the first condenser to the first receiver, A first drier provided on a first circulation line between the first expansion valve and the first expansion valve for removing foreign matter contained in the refrigerant discharged from the first receiver to the first expansion valve, Pressure refrigerant flowing along the first circulation line to visually confirm the state of the high-pressure and high-temperature refrigerant flowing along the first circulation line, and a second circulation line between the second condenser and the second expansion valve of the second cooling section, line And a second side for providing a flow path for bypassing the refrigerant directly to the second receiver in the second compressor, and a second side disposed in the second receiver for temporarily storing the refrigerant liquid of high pressure and high temperature liquefied in the second condenser, And a second condenser inlet side of the second condenser that is circulated from the second compressor to the second condenser, the refrigerant pressure of the second condenser outlet side being circulated from the second condenser to the second receiver through the second circulation line, And selectively bypassing a portion of the refrigerant circulating on the inlet side of the second condenser to the second condenser outlet side through the second side to separate the refrigerant from the second condenser outlet which is circulated from the second condenser to the second receiver, And a second expansion valve that is provided on the second circulation line between the second condenser and the second expansion valve and is included in the refrigerant liquid sent from the second receiver to the second expansion valve To remove foreign matter Further comprising a second drier and a second sidewall disposed behind the second drier for allowing the user to visually confirm the state of the high-pressure and high-temperature refrigerant flowing along the second circulation line, A cooling tower disposed in front of the first evaporator of the first cooling section and connected to the first cold water circulation line and the second cold water circulation line of the cooling tower in parallel to provide cold water to the first condenser and the second condenser through a cold water circulation line; A cold water coil connected to the cooling water circulation line, the cold water coil for precooling the outside air before being drawn into the first evaporator by the cold water cooled by the cooling tower in a heat exchange manner, and a second cold water circulation line The cold water sent out from the cooling tower is selectively cooled according to the temperature of the cold water flowing along the first cold water circulation line based on the temperature of the predetermined cold water, To flow to the coil, including the three-way valve that opens and closes the second flow path of the cold water circulation line, the cooling line to the outside air before it is drawn into the first evaporator, the first cooling portion to the cold water cooled by the heat exchange system.
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The constant temperature and humidity system using external cold water according to the present invention has the following effects.
First, before the outside air passes through the cooling unit for cooling the outside air, the precooling unit precools the outside air before being drawn into the first evaporator of the first cooling unit by using the cold water cooled by the heat exchange method, The foreign matter contained in the refrigerant discharged from the receiver to the expansion valve is removed through the dryer and the state of the high-pressure high-temperature refrigerant flowing along the circulation line through the sight glass can be visually confirmed It is possible to actively cope with it, and thus it is possible to operate efficiently.
Second, heat exchange efficiency is improved by indirect heat exchange with cold water, and there is no humidity change, and cold water of the cooling tower is used as an energy source, so that energy efficiency is increased.
Thirdly, a plurality of cooling units for cooling the precooled outside air are provided, and either one of the cooling units alone can be driven according to the temperature of the outside air, or a plurality of the cooling units can be driven to actively cope with the load, It has a possible effect.
Fourthly, a differential pressure valve is provided which compares the refrigerant pressure at the inlet side of the condenser with the outlet refrigerant pressure in the cooling section and selectively bypasses the refrigerant at the inlet side of the condenser to the outlet of the condenser, so that the pressure loss generated in the condensing process is compensated, Is prevented from being lowered.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a constant temperature and humidity system using outside cold water according to an embodiment of the present invention; FIG.
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.
In the present invention, the outside air is pre-cooled in a pre-cooling unit using cold water cooled by heat exchange before the outside air is passed through the cooling unit for cooling the outside air, and then supplied to the cooling unit. The present invention relates to a constant-temperature and constant-humidity system using outside-air cold water for further cooling the outside air in single or multi-stage, and will be described with reference to the drawings.
At this time, the outside air described in the present invention is not limited to the outside air drawn in from the outside, and the air cooled through the pre-cooling unit according to the present invention is referred to as an outside air.
Referring to FIG. 1, the constant temperature and humidity system using external cold water according to the present invention includes a
The
The compressor which can be employed here is not limited to any one, and any of reciprocating, scroll, screw and centrifugal compressors may be employed.
The high-pressure and high-temperature refrigerant gas compressed by the
At this time, in the
Accordingly, the high-pressure and high-temperature refrigerant liquid is converted into the high-pressure and high-temperature refrigerant liquid as it is condensed by the heat exchange method with the cold water of the
The
In this case, the
The
A
More specifically, the first
Therefore, the first
A
A
The
At this time, the high-pressure and high-temperature refrigerant sent out from the
The
Accordingly, the
The
The high-pressure and high-temperature refrigerant gas compressed by the
At this time, in the
Accordingly, the high-pressure and high-temperature refrigerant liquid is converted into the high-pressure and high-temperature refrigerant liquid as it is condensed by the heat exchange method with the cold water of the
The
In this case, the
The
A
More specifically, the second
Accordingly, the second
A
A second drier 205, a
The
At this time, the high-pressure and high-temperature refrigerant sent out from the second receiver (230) is converted into a low-pressure low-temperature refrigerant liquid through the second expansion valve (240) and is sent to the second evaporator (250).
The
Accordingly, the
At this time, it is preferable that the driving of the
As described above, the control of the
For example, when the temperature of the outside air is lower than the first predetermined temperature, the
When the temperature of the outside air is between the first set temperature and the second set temperature, only the compressor of the first compressor (110) and the second compressor (210) is driven to cool the outside air, The precooling
When the temperature of the outside air is higher than the second predetermined temperature, both the first compressor (110) and the second compressor (210) are driven to cool the outside air.
The air conditioning system according to the present invention includes a
The
The cold water is forcibly circulated along the first cold
At this time, the
A three-
For example, if the temperature of the cold water flowing along the first cold
Accordingly, in the pre-cooling air conditioning system according to the present invention, the precooling unit precools the outside air using the cold water cooled by the heat exchange method, and then provides the cooled air to the cooling unit. Provided by cooling the outside air into single or multi-stage.
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: first cooling section 101: first circulation line
102: first side 103: first differential pressure valve
104: first stop valve 105: first dryer
106: first sight glass 107: first slave node valve
110: first compressor 120: first condenser
130: first receiver 140: first expansion valve
150: first evaporator 200: second cooling part
201: second circulation line 202: second side
203: second differential pressure valve 204: second stop valve
205: Second dryer 206: Second site glass
207: second slave node valve 210: second compressor
220: second condenser 230: second receiver
240: second expansion valve 250: second evaporator
300: pre-cooling unit 301: cold water circulation line
302: circulation pump 310: cooling tower
320: cold water coil 330: 3 way valve
Claims (4)
A first receiver disposed on a first circulation line between the first condenser and the first expansion valve of the first cooling section and temporarily storing the high-pressure and high-temperature refrigerant liquid liquefied in the first condenser;
A first side for providing a flow path for bypassing the refrigerant directly from the first compressor to the first receiver;
A first condenser outlet disposed on the first side and circulating from the first condenser to the first receiver through the first circulation line and a second condenser inlet circulating from the first compressor to the first condenser; The first refrigerant is circulated from the first condenser to the first receiver by bypassing a portion of the refrigerant selectively circulating on the inlet side of the first condenser to the outlet side of the first condenser through the first side, A first differential pressure valve for adjusting the pressure of the refrigerant at the outlet side;
A first dryer disposed on a first circulation line between the first condenser and the first expansion valve to remove foreign substances contained in the refrigerant discharged from the first receiver to the first expansion valve;
Further comprising a first sight glass disposed behind the first dryer for visually confirming a state of the high-pressure and high-temperature refrigerant flowing along the first circulation line,
A second liquid receiver disposed on a second circulation line between the second condenser and the second expansion valve of the second cooling section for temporarily storing the high-pressure and high-temperature refrigerant liquid liquefied in the second condenser;
A second side for providing a flow path for bypassing the refrigerant directly from the second compressor to the second receiver;
A second condenser inlet disposed on the second side for circulating from the second compressor to the second condenser and a refrigerant pressure on the second condenser outlet side circulated from the second condenser to the second receiver through the second circulation line, The second refrigerant circulates from the second condenser to the second receiver by bypassing a part of the refrigerant selectively circulating at the inlet side of the second condenser to the outlet side of the second condenser through the second side, A second differential pressure valve for adjusting the pressure of the refrigerant at the outlet side;
A second dryer disposed on a second circulation line between the second condenser and the second expansion valve for removing foreign matters contained in the refrigerant discharged from the second receiver to the second expansion valve;
Further comprising a second window glass disposed behind the second dryer for visually confirming a state of the high-pressure and high-temperature refrigerant flowing along the second circulation line,
A cooling tower for supplying cold water cooled by a heat exchange system to the first condenser and the second condenser through a cold water circulation line;
The outdoor unit is disposed in front of the first evaporator of the first cooling unit and connected in parallel to the first cold water circulation line and the second cold water circulation line of the cooling tower, A cold water coil for preheating the cold water;
And a second cold water circulation line connected to the first cold water circulation line and the second cold water circulation line, wherein the first cold water circulation line and the second cold water circulation line are connected in parallel to each other, Way valve that opens and closes the flow path of the second cold water circulation line so that the cold water sent out from the cooling tower selectively flows into the cold water coil so that the cold water cooled by the heat exchange method is introduced into the first evaporator of the first cooling part Constant temperature and humidity system using external cold water to cool external air.
Priority Applications (1)
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KR1020150148643A KR101814074B1 (en) | 2015-10-26 | 2015-10-26 | Air-conditioning system using the outside air cold water |
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KR1020150148643A KR101814074B1 (en) | 2015-10-26 | 2015-10-26 | Air-conditioning system using the outside air cold water |
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KR20170047927A KR20170047927A (en) | 2017-05-08 |
KR101814074B1 true KR101814074B1 (en) | 2018-01-02 |
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KR1020150148643A KR101814074B1 (en) | 2015-10-26 | 2015-10-26 | Air-conditioning system using the outside air cold water |
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Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN109737529A (en) * | 2018-08-30 | 2019-05-10 | 新疆绿色使者空气环境技术有限公司 | The air-conditioning device that the cooling more warm cooling-water machines of evaporation are combined with mechanical refrigeration |
KR102014931B1 (en) * | 2019-04-18 | 2019-08-28 | 주식회사 에이알 | Hybrid outdoor air cooling system using natural energy and control method thereof |
CN113091258A (en) * | 2021-04-07 | 2021-07-09 | 青岛海尔空调器有限总公司 | Method and device for controlling precooling of air-conditioner air return inlet |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101117773B1 (en) * | 2009-12-09 | 2012-03-20 | 신라이앤티 (주) | low dew point and low temperature dehumidifier |
KR101321979B1 (en) * | 2012-05-04 | 2013-10-28 | 김해중 | Water Cooling type Air Conditioning Apparatus Using Cooling Water |
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2015
- 2015-10-26 KR KR1020150148643A patent/KR101814074B1/en active IP Right Grant
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101117773B1 (en) * | 2009-12-09 | 2012-03-20 | 신라이앤티 (주) | low dew point and low temperature dehumidifier |
KR101321979B1 (en) * | 2012-05-04 | 2013-10-28 | 김해중 | Water Cooling type Air Conditioning Apparatus Using Cooling Water |
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