CN110398047A - A kind of evaporative cooling system and control method - Google Patents

A kind of evaporative cooling system and control method Download PDF

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Publication number
CN110398047A
CN110398047A CN201910626224.6A CN201910626224A CN110398047A CN 110398047 A CN110398047 A CN 110398047A CN 201910626224 A CN201910626224 A CN 201910626224A CN 110398047 A CN110398047 A CN 110398047A
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CN
China
Prior art keywords
module
outdoor
outdoor air
control
detection
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CN201910626224.6A
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Chinese (zh)
Inventor
范玉斐
张菀
徐珊
刘磊
罗生超
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Isco Technology Group Ltd By Share Ltd
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Isco Technology Group Ltd By Share Ltd
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Priority to CN201910626224.6A priority Critical patent/CN110398047A/en
Publication of CN110398047A publication Critical patent/CN110398047A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/64Electronic processing using pre-stored data
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/89Arrangement or mounting of control or safety devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00Control inputs relating to air properties
    • F24F2110/10Temperature
    • F24F2110/12Temperature of the outside air

Abstract

The present invention relates to a kind of evaporative cooling system and control methods, including indirect refrigerating module, evaporation module, heat exchanger, indoor air supply module, outdoor air supply module, first detection module and control module, indoor air supply module is used for the conveying of room air, and outdoor air supply module is used for the conveying of outdoor air;Indirect refrigerating module is for outdoor air and its cooling water mediate contact to carry out heat exchange, evaporation module is directly contacted for outdoor air with its cooling water to carry out heat exchange, and heat exchanger is delivered to interior after carrying out heat exchange with the cooling water mediate contact of outdoor air, evaporation module respectively for room air;First detection module is communicated to connect with indirect refrigerating module, evaporation module and first detection module respectively for detecting outdoor temperature, control module, and control module controls indirect refrigerating module according to the temperature value that first detection module detects and evaporates the opening and closing of module.Different cooling mode of operation is selected, natural cooling source is made full use of, it is energy saving.

Description

A kind of evaporative cooling system and control method
Technical field
The present invention relates to air-conditioning technical fields, more particularly, to a kind of evaporative cooling system and control method.
Background technique
The energy-saving and emission-reduction and environmentally protective demand to grow in intensity in world wide, to as the maximum data of IT industry energy consumption More stringent requirements are proposed for center construction and operation.The reduction of data center's PUE value has become the head of owner and design and construction person Want demand.
For the mode of traditional compressor refrigeration, since the power consumption of compressor is generally bigger, so integrated machine The energy consumption of room air-conditioning can be very high, and room management cost is caused to be sharply increased.And by natural cooling source come computer room heat dissipation, then machine Room energy consumption can reduce, and whole PUE and CLF are relatively low.And the cold phase-state change by using water of indirect evaporation, it can be better The heat of computer room is taken away, and environment is not influenced, belongs to environmentally friendly working medium, the CLF of general computer room can accomplish 0.1 or so.
Therefore, energy-efficient data center is a big inexorable trend of Future Data center industry development, continues and has The operation cost that effect ground reduces data center has become the task of top priority.So being set for evaporation cooling technique in air conditioner in machine room Application in standby, and different operational modes is provided, improves transpiration-cooled efficiency to the entire energy consumption of IT room system It can seem extremely important.
Summary of the invention
The first object of the present invention is to provide a kind of evaporative cooling system, according to the size of outdoor temperature, provides a variety of cold But operational mode meets different use environments.
Foregoing invention purpose of the invention has the technical scheme that a kind of evaporative cooling system, packet Include indirect refrigerating module, evaporation module, heat exchanger, indoor air supply module, outdoor air supply module, first detection module and control mould Block, the interior air supply module make it by the heat exchanger for the conveying of room air, and the outdoor air supply module is used for The conveying of outdoor air makes it successively by the indirect refrigerating module, the evaporation module and the heat exchanger;It is described indirect Refrigerating module carries out heat exchange for outdoor air and its cooling water mediate contact, the evaporation module for outdoor air and Its cooling water is directly contacted to carry out heat exchange, the heat exchanger for room air respectively with outdoor air, the evaporation mold The cooling water mediate contact of block is delivered to interior after carrying out heat exchange;The first detection module is for detecting outdoor temperature, institute Control module is stated to communicate to connect with the indirect refrigerating module, the evaporation module and the first detection module respectively, it is described Control module is according to receiving the temperature value of first detection module detection to control the indirect refrigerating module and the steaming Send out the opening and closing of module.
By using above-mentioned technical proposal, indirect refrigerating module and evaporation module are indirectly cooling and straight to outdoor air progress Evaporation cooling is connect, outdoor air can be allowed to obtain more cooling capacity, to can preferably reduce room temperature in heat exchanger;Together When evaporation module cooling water can also further decrease room temperature with room air mediate contact.According to first detection module The outdoor temperature size of detection, control module selects different cooling mode of operation, including closes indirect refrigerating module and evaporation Module starts indirect refrigerating module, starts indirect refrigerating module and evaporation module;Different use environments can be met in this way, saved The about energy can make full use of natural cooling source, accomplish the purpose of water-saving economize on electricity.
The present invention is further arranged to: when the indirect refrigerating module and the evaporation module are turned off, the control Module and the outdoor air supply module communicate to connect, the temperature that the control module is detected according to the first detection module is received Angle value is to control the air quantity of the outdoor air supply module.
By using above-mentioned technical proposal, when the flow of room air keeps certain range constant, according to outdoor temp It spends to adjust the flow of outdoor air, so that the heat exchange effect of outdoor air and room air is more preferable.
The present invention is further arranged to: further including that detection outdoor air enters institute when indirect refrigerating module starting Second detection module of dry-bulb temperature when stating heat exchanger, the control module respectively with the outdoor air supply module and described second Detection module communication connection, the control module control described according to the temperature value that second detection module detects is received The air quantity of outdoor air supply module, the control module are examined according to the first detection module and second detection module is received The temperature difference of survey is to control the cooling water flow of the indirect refrigerating module.
By using above-mentioned technical proposal, adjusted according to the temperature difference of temperature at heat exchanger entrance and outdoor temperature indirectly cold But the cooling water flow of module, to realize the preliminary purpose for reducing room air.
The present invention is further arranged to: further including described in detection outdoor air enters when the evaporation module starts The third detection module of wet-bulb temperature when heat exchanger, the control module and the third detection module communicate to connect, the control Molding root tuber evidence receives the temperature difference of second detection module and third detection module detection to control the evaporation mold The cooling water flow of block.
By using above-mentioned technical proposal, steaming is adjusted according to the temperature difference of dry-bulb temperature at heat exchanger entrance and wet-bulb temperature The cooling water flow of module is sent out, to realize the purpose for reducing room air again.
The present invention is further arranged to: the indirect refrigerating module includes water tank and heat exchange coil, the water tank with it is described It is communicated with the first water inlet pipe and return pipe between heat exchange coil, is provided on first water inlet pipe for by the water of the water tank It is delivered to the first water pump of the heat exchange coil, first water pump and the control module communicate to connect.
By using above-mentioned technical proposal, the water in water tank is pumped into heat exchange coil by the first water pump, outdoor air with The heat exchange coil of heat exchange coil contacts, to exchange heat to outdoor air, reduces the temperature of outdoor air;By heat exchange coil Cooling water be back in water tank by return pipe, thus to water resource recycle, reduce water consumption/machine of WUE(air-conditioning The energy consumption in room) value;Control module reaches the control of water flow in exchange hot coil by the revolving speed of the first water pump of control.
The present invention is further arranged to: the evaporation module includes water tank below the heat exchanger and multiple is located at Spray head above the heat exchanger is communicated with the second water inlet pipe, second water inlet between the water tank and the spray head The second water pump for the water of the water tank to be delivered to the spray head, second water pump and the control are provided on pipe Module communication connection.
By using above-mentioned technical proposal, the cooling water in water tank is pumped at spray head by the second water pump, and through spraying Head is sprayed to heat exchanger, and part cooling water is directly contacted with outdoor air, and directly evaporation occurs by room with outdoor air Outer air is taken away, and the temperature for reducing outdoor air is reached;Part cooling water is flow back into water tank along the pipeline of heat exchanger, and with Indirect evaporation occurs for room air to cool down to room air, to recycle to water resource, reduces the consumption of WUE(air-conditioning Water/computer room energy consumption) value;Control module is reached by the revolving speed of the second water pump of control to spray water flow in spray head Control.
The present invention is further arranged to: the outdoor air supply module includes outdoor fan, the outdoor fan and the control The communication connection of molding block.
By using above-mentioned technical proposal, outdoor fan conveys the outdoor air entered in heat exchanger, controls mould Block reaches the control to outdoor air force by the revolving speed of control outdoor fan.
The second object of the present invention is to provide a kind of evaporative cooling system control method and is mentioned according to the size of outdoor temperature For a variety of cooling mode of operation, meet different use environments.
Foregoing invention purpose of the invention has the technical scheme that a kind of evaporative cooling system control Method, comprising the following steps:
S1, the first temperature threshold T of setting1, second temperature threshold value T2With third temperature threshold T3, and T1< T2< T3
S2, the dry-bulb temperature T for detecting outdoor air;
S3, the operating mode that cooling system is controlled according to dry-bulb temperature T:
As T < T1When, close indirect refrigerating module and evaporation module;
Work as T1< T < T2When, start indirect refrigerating module, closes evaporation module;
Work as T2< T < T3When, start indirect refrigerating module and evaporation module;
As T > T3When, start indirect refrigerating module and evaporation module, and refrigeration is compensated by other cold sources.
It selects different operating modes according to the size of outdoor temperature by using above-mentioned technical proposal: working as outdoor temperature When lower, indirect refrigerating module and evaporation module are closed, is only carried out in heat exchanger by outdoor Cryogenic air and room air Heat exchange is with to indoor offer cooling capacity, this operating condition is known as dry cooling condition;When outdoor temperature is in medium temperature, can star indirectly cold But module does indirect cooling and indirect evaporation to outdoor air by heat exchange coil, reduces the temperature of outdoor air, this process In, the water circulation use of heat exchange coil can save water resource;When outdoor temperature is higher, indirect cooling can be started simultaneously Module and evaporation module, do indirect cooling and indirect evaporation to outdoor air by heat exchange coil, reduce the temperature of outdoor air, Then directly being evaporated by spray head to outdoor air reduces outside air temperature, and outdoor air have passed through twice in whole process Heat exchange, heat exchange amount is larger, and the temperature of outdoor air reduces larger, and then room air is changed with outdoor air indirectly again Heat, room air and shower water carry out indirect heat exchange and indirect evaporation, to reduce indoor air temperature;When outdoor temperature is excessively high When, not only start indirect refrigerating module and evaporation module simultaneously, refrigeration, such as compression mechanism can be also compensated by other cold sources It is cold.Different use environments can be met, it is energy saving, natural cooling source can be made full use of, accomplishes the purpose of water-saving economize on electricity.
The present invention is further arranged to: in step S2, detection outdoor air enters dry-bulb temperature T when heat exchangerIt is dryThe room and Outer air enters wet-bulb temperature T when heat exchangerIt is wet
Work as TIt is dry< T0When, air quantity Q=Q of outdoor fan0;Work as T0< TIt is dry< T1When, air quantity Q=[(Q of outdoor fanIt is maximum-Q0)/ (T1-T0)] (TIt is dry-T1)+QIt is maximum;Work as TIt is dry> T0When, air quantity Q=Q of outdoor fanIt is maximum
Work as TIt is dry-TIt is wetAt=0 DEG C, revolving speed N=0 of the first water pump;As 0 DEG C of < TIt is dry-TIt is wetAt 5 DEG C of <, revolving speed N=N of the first water pumpIt is maximum/5 (TIt is dry-TIt is wet);
Wherein, T0For the minimum temperature of outdoor setting, Q0For outdoor minimum operation air quantity, QIt is maximumAccording to the maximum system of indoor needs Cooling capacity and the temperature difference determine, NIt is maximumAccording to maximum quantity of wind and water by when mass values determine.
By using above-mentioned technical proposal, under different working modes, the revolving speed of outdoor fan, the first water pump are controlled The revolving speed of revolving speed and/or the second water pump, under the premise of energy saving, so that the heat exchanger effectiveness of outdoor air and room air More preferably.
The present invention is further arranged to: the first temperature threshold T1It is 16 DEG C, the second temperature threshold value T2It is 20 DEG C, The third temperature threshold T3It is 30 DEG C.
In conclusion advantageous effects of the invention are as follows: indirect refrigerating module and evaporation module carry out outdoor air Indirectly cooling and directly evaporation, can allow outdoor air to obtain more cooling capacity, to can preferably reduce room in heat exchanger Interior temperature;The cooling water for evaporating module simultaneously can also further decrease room temperature with room air mediate contact.According to first The outdoor temperature size of detection module detection, control module select different cooling mode of operation, including close cooling mould indirectly Block and evaporation module, start indirect refrigerating module, start indirect refrigerating module and evaporation module;Different uses can be met in this way Environment, it is energy saving, natural cooling source can be made full use of, accomplishes the purpose of water-saving economize on electricity.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the present invention;
Fig. 2 is the system block diagram of the embodiment of the present invention.
In figure, 1, heat exchanger;2, water tank;3, heat exchange coil;4, the first water inlet pipe;5, return pipe;6, the first water pump;7, it sprays Drench head;8, the second water inlet pipe;9, the second water pump;10, outdoor fan;11, indoor fan;12, first filter;13, the second mistake Filter.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
A kind of evaporative cooling system, as depicted in figs. 1 and 2, including indirect refrigerating module, evaporation module, heat exchanger 1, room Interior air supply module, outdoor air supply module, first detection module and control module, indoor air supply module are used for the conveying of room air Make it by heat exchanger 1, conveying of the outdoor air supply module for outdoor air makes it successively pass through indirect refrigerating module, evaporation mold Block and heat exchanger 1;Indirect refrigerating module for outdoor air and its cooling water mediate contact to carry out heat exchange, use by evaporation module Directly contacted with its cooling water in outdoor air to carry out heat exchange, heat exchanger 1 for room air respectively with outdoor air, steam The cooling water mediate contact of hair module is delivered to interior after carrying out heat exchange;First detection module is controlled for detecting outdoor temperature Molding block is communicated to connect with indirect refrigerating module, evaporation module and first detection module respectively, and control module is according to receiving the The temperature value of one detection module detection is to control indirect refrigerating module and evaporate the opening and closing of module.
According to the outdoor temperature size that first detection module detects, control module selects different cooling mode of operation, wraps Include the mode for closing indirect refrigerating module and evaporation module, start the mode of indirect refrigerating module, start indirect refrigerating module and Evaporate template pattern;Different use environments can be met in this way, it is energy saving, natural cooling source can be made full use of, accomplish it is water-saving, The purpose of economize on electricity.Wherein, control module is central controller.
Indirect refrigerating module includes water tank 2 and heat exchange coil 3, and the first water inlet pipe is communicated between water tank 2 and heat exchange coil 3 4 and return pipe 5, the first water pump 6 for the water of water tank 2 to be delivered to heat exchange coil 3 is installed on first water inlet pipe 4, first Water pump 6 and control module communicate to connect;Water in water tank 2 is pumped into heat exchange coil 3 by the first water pump 6, outdoor air with change The heat exchange coil of hot coil 3 contacts, to exchange heat to outdoor air, reduces the temperature of outdoor air;By heat exchange coil 3 Cooling water be back in water tank 2 by return pipe 5, to be recycled to water resource, reduce the water consumption of WUE(air-conditioning/ The energy consumption of computer room) value;Control module reaches the control of water flow in exchange hot coil 3 by the revolving speed of the first water pump 6 of control. Wherein, first filter 12 is installed on the first water inlet pipe 4, it is cold to being flowed in the first water inlet pipe 4 by first filter 12 But water is filtered.
Evaporation module includes the water tank 2 and multiple spray heads 7 positioned at 1 top of heat exchanger positioned at 1 lower section of heat exchanger, water tank It is communicated with the second water inlet pipe 8 between 2 and spray head 7, is equipped on the second water inlet pipe 8 for the water of water tank 2 to be delivered to spray First 7 the second water pump 9, the second water pump 9 are communicated to connect with control module;Cooling water in water tank 2 is pumped into spray by the second water pump 9 It drenches at head 7, and is sprayed through spray head 7 to heat exchanger 1, part cooling water is directly contacted with outdoor air, and empty with outdoor Gas occurs directly evaporation and is taken away by outdoor air, reaches the temperature for reducing outdoor air;Part cooling water along heat exchanger 1 pipe Road is flow back into water tank 2, and indirect evaporation occurs to cool down to room air with room air, to recycle benefit to water resource With reducing water consumption/computer room energy consumption of WUE(air-conditioning) value;Control module is reached by the revolving speed of the second water pump 9 of control Control to spray water flow in spray head 7.Wherein, second filter 13 is installed on the second water inlet pipe 8, passes through the second filtering Device 13 is filtered the cooling water flowed in the second water inlet pipe 8.
Outdoor air supply module includes outdoor fan 10, and outdoor fan 10 and control module communicate to connect;Outdoor fan 10 is right It is conveyed into the outdoor air in heat exchanger 1, control module is reached by the revolving speed of control outdoor fan 10 to outdoor wind Measure the control of size.Indoor air supply module includes indoor fan 11,11 pairs of the indoor fan room airs entered in heat exchangers 1 into Row conveys, and indoor air flow channel and outdoor air runner are not connected in heat exchanger 1.
When indirect refrigerating module and evaporation module are turned off, control module and outdoor air supply module are communicated to connect, control Module according to receive first detection module detection temperature value with the air quantity of air supply module outside control room.It can not have to open Any evaporation refrigerating module operation, is only exchanged heat in heat exchanger 1 by outdoor Cryogenic air and room air to indoor offer Cooling capacity, this operating condition are known as dry cooling condition;Because the thermic load and the indoor air blow and return temperature difference in computer room be it is fixed, generally The range that the flow of room air keeps certain is constant, and the flow of outdoor air is adjusted according to outdoor temperature, so that outdoor empty The heat exchange effect of gas and room air is more preferable.
It further include the second inspection for detecting dry-bulb temperature when outdoor air enters heat exchanger 1 when the starting of indirect refrigerating module Module is surveyed, control module is communicated to connect with outdoor air supply module and the second detection module respectively, and control module is according to receiving the The temperature value of two detection modules detection is with the air quantity of air supply module outside control room, and control module is according to receiving first detection module The temperature difference with the detection of the second detection module is to control the cooling water flow of indirect refrigerating module.Cooling mould indirectly can be opened Block does indirect cooling and indirect evaporation to outdoor air by heat exchange coil 3, reduces the temperature of outdoor air, during this, changes Water circulation use in hot coil 3 can save water resource;According to the temperature difference of 1 inlet temperature of heat exchanger and outdoor temperature come The cooling water flow of indirect refrigerating module is adjusted, to realize the preliminary purpose for reducing room air.
It further include the third detection for detecting wet-bulb temperature when outdoor air enters heat exchanger 1 when evaporation module starts Module, control module and third detection module communicate to connect, and control module is according to receiving the second detection module and third detection The temperature difference of module detection is to control the cooling water flow for evaporating module.Indirect refrigerating module and evaporation module are opened simultaneously, are led to It crosses heat exchange coil 3 and does indirect cooling and indirect evaporation to outdoor air, reduce the temperature of outdoor air, then pass through spray head 7 Directly evaporating to outdoor air reduces outside air temperature, and outdoor air have passed through in whole process exchanges heat twice, heat exchange amount compared with Greatly, the temperature drop of outdoor air is larger, and last room air carries out indirect heat exchange, Interior Space with outdoor air again at heat exchanger 1 Gas and shower water carry out indirect heat exchange and indirect evaporation, to reduce indoor air temperature;According to 1 inlet dry-bulb temperature of heat exchanger The cooling water flow and spray pressure of evaporation module are adjusted with the temperature difference of wet-bulb temperature, so that realize reduces room air again Purpose.
Evaporative cooling system control method, comprising the following steps: S1, the first temperature threshold T of setting1, second temperature threshold value T2 With third temperature threshold T3, and T1< T2< T3, wherein T1It is 16 DEG C, T2It is 20 DEG C, T3It is 30 DEG C;S2, outdoor air is detected Dry-bulb temperature T;S3, the operating mode that cooling system is controlled according to dry-bulb temperature T: as T < T1When, close indirect refrigerating module and Evaporate module;Work as T1< T < T2When, start indirect refrigerating module, closes evaporation module;Work as T2< T < T3When, starting is indirectly cold But module and evaporation module;As T > T3When, start indirect refrigerating module and evaporation module, and system is compensated by other cold sources It is cold.
In step S2, detection outdoor air enters dry-bulb temperature T when heat exchanger 1It is dryWhen entering heat exchanger 1 with outdoor air Wet-bulb temperature TIt is wet;Work as TIt is dry< T0When, air quantity Q=Q of outdoor fan 100;Work as T0< TIt is dry< T1When, the air quantity Q of outdoor fan 10= TIt is dry(QIt is maximum-Q0)/(T1-T0);Work as TIt is dry> T0When, air quantity Q=Q of outdoor fan 10It is maximum;Work as TIt is dry-TIt is wetAt=0 DEG C, the first water pump 6 Revolving speed N=0;As 0 DEG C of < TIt is dry-TIt is wetAt 5 DEG C of <, revolving speed N=N of the first water pump 6It is maximum/ 5(TIt is dry-TIt is wet);Wherein, T0For outdoor setting Minimum temperature, Q0For outdoor minimum operation air quantity, QIt is maximumIt is determined according to the maximum cooling capacity of indoor needs and the temperature difference, NIt is maximumAccording to Maximum quantity of wind and water by when mass values determine.V is the maximum (top) speed of outdoor fan 10, under normal circumstances Q0For blower Revolving speed V*10% when air quantity;Revolving speed, the revolving speed of the first water pump 6 and/or the revolving speed of the second water pump 9 of outdoor fan 10 are controlled, Under the premise of energy saving, so that the heat exchanger effectiveness of outdoor air and room air is more preferable.
Outdoor air is cooled down by the second water pump 9, main mechanism is by dry-bulb temperature TIt is dryIt is direct by humidifying It is cooled to wet-bulb temperature TIt is wet, direct evaporating-cooling efficiency of the general warranty during this can pass 90% or more by temperature and humidity Sensor detected.Need to open compressor to compensate refrigeration, the revolving speed control of compressor can pass through P demand under normal circumstances Or PID is controlled.
According to the size of outdoor temperature, different operating modes is selected: when outdoor temperature is lower, closing cooling mould indirectly Block and evaporation module only carry out heat exchange by outdoor Cryogenic air and room air to give indoor offer cold in heat exchanger 1 Amount, this operating condition are known as dry cooling condition;When outdoor temperature is in medium temperature, it can star indirect refrigerating module, pass through heat exchange coil 3 Indirect cooling and indirect evaporation are done to outdoor air, reduces the temperature of outdoor air, during this, the water of heat exchange coil 3 is recycled It utilizes, water resource can be saved.
When outdoor temperature is higher, indirect refrigerating module and evaporation module can be started simultaneously, give room by heat exchange coil 3 Outer air does indirect cooling and indirect evaporation, reduces the temperature of outdoor air, is then directly steamed by spray head 7 to outdoor air Hair reduces outside air temperature, and outdoor air have passed through heat exchange twice in whole process, and heat exchange amount is larger, the temperature of outdoor air Degree reduces larger, and then room air carries out indirect heat exchange with outdoor air again, and room air is changed indirectly with shower water Heat and indirect evaporation, to reduce indoor air temperature;When outdoor temperature is excessively high, not only start indirect refrigerating module and steaming simultaneously Module is sent out, refrigeration, such as compressor refrigeration can be also compensated by other cold sources.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it It is interior.

Claims (10)

1. a kind of evaporative cooling system, which is characterized in that sent including indirect refrigerating module, evaporation module, heat exchanger (1), interior Wind module, outdoor air supply module, first detection module and control module, the interior air supply module are used for the conveying of room air Make it by the heat exchanger (1), it is described indirect that the conveying that the outdoor air supply module is used for outdoor air passes through it successively Refrigerating module, the evaporation module and the heat exchanger (1);The indirect refrigerating module is used between outdoor air and its cooling water To carry out heat exchange, the evaporation module is directly contacted with its cooling water for outdoor air to carry out heat exchange, institute for contact It states the cooling water mediate contact of heat exchanger (1) for room air respectively with outdoor air, the evaporation module and carries out heat exchange After be delivered to interior;The first detection module for detecting outdoor temperature, the control module respectively with the indirect cooling Module, the evaporation module and first detection module communication connection, the control module are examined according to receiving described first The temperature value of module detection is surveyed to control the opening and closing of the indirect refrigerating module and the evaporation module.
2. a kind of evaporative cooling system according to claim 1, which is characterized in that when the indirect refrigerating module and described When evaporation module is turned off, the control module and the outdoor air supply module are communicated to connect, and the control module is according to reception The air quantity of the outdoor air supply module is controlled to the temperature value of first detection module detection.
3. a kind of evaporative cooling system according to claim 1, which is characterized in that when the indirect refrigerating module starts When, it further include the second detection module for detecting dry-bulb temperature when outdoor air enters the heat exchanger (1), the control module point It is not communicated to connect with the outdoor air supply module and second detection module, the control module is according to receiving described second The temperature value of detection module detection is to control the air quantity of the outdoor air supply module, and the control module is according to receiving described the One detection module and the temperature difference of second detection module detection are to control the cooling water flow of the indirect refrigerating module.
4. a kind of evaporative cooling system according to claim 3, which is characterized in that when the evaporation module starts, It further include the third detection module for detecting wet-bulb temperature when outdoor air enters the heat exchanger (1), the control module and institute State third detection module communication connection, the control module according to receive second detection module and the third detection mould The temperature difference of block detection is to control the cooling water flow for evaporating module.
5. a kind of evaporative cooling system according to claim 1,2,3 or 4, which is characterized in that the indirect refrigerating module Including water tank (2) and heat exchange coil (3), the first water inlet pipe (4) are communicated between the water tank (2) and the heat exchange coil (3) With return pipe (5), it is provided with for the water of the water tank (2) to be delivered to the heat exchange coil on first water inlet pipe (4) (3) the first water pump (6), first water pump (6) and the control module communicate to connect.
6. a kind of evaporative cooling system according to claim 1,2,3 or 4, which is characterized in that the evaporation module includes Water tank (2) and multiple spray heads (7) above the heat exchanger (1) below the heat exchanger (1), the water tank (2) it is communicated with the second water inlet pipe (8), is provided on second water inlet pipe (8) for will be described between the spray head (7) The water of water tank (2) is delivered to the second water pump (9) of the spray head (7), and second water pump (9) communicates with the control module Connection.
7. a kind of evaporative cooling system according to claim 1,2,3 or 4, which is characterized in that the outdoor air supply module Including outdoor fan (10), the outdoor fan (10) and the control module are communicated to connect.
8. a kind of evaporative cooling system control method, which comprises the following steps:
S1, the first temperature threshold T of setting1, second temperature threshold value T2With third temperature threshold T3, and T1< T2< T3
S2, the dry-bulb temperature T for detecting outdoor air;
S3, the operating mode that cooling system is controlled according to dry-bulb temperature T:
As T < T1When, close indirect refrigerating module and evaporation module;
Work as T1< T < T2When, start indirect refrigerating module, closes evaporation module;
Work as T2< T < T3When, start indirect refrigerating module and evaporation module;
As T > T3When, start indirect refrigerating module and evaporation module, and refrigeration is compensated by other cold sources.
9. a kind of evaporative cooling system control method according to claim 8, which is characterized in that
In step S2, dry-bulb temperature T when detection outdoor air enters heat exchanger (1) is dry and outdoor air enters heat exchanger (1) When wet-bulb temperature T it is wet;
Work as TIt is dry< T0When, air quantity Q=Q of outdoor fan (10)0;Work as T0< TIt is dry< T1When, the air quantity Q of outdoor fan (10)= [(QIt is maximum-Q0)/(T1-T0)] (TIt is dry-T1)+QIt is maximum;Work as TIt is dry> T0When, air quantity Q=Q of outdoor fan (10)It is maximum
Work as TIt is dry-TIt is wetAt=0 DEG C, revolving speed N=0 of the first water pump (6);As 0 DEG C of < TIt is dry-TIt is wetAt 5 DEG C of <, the revolving speed N of the first water pump (6) =NIt is maximum/ 5(TIt is dry-TIt is wet);
Wherein, T0For the minimum temperature of outdoor setting, Q0For outdoor minimum operation air quantity, QIt is maximumAccording to the maximum refrigeration of indoor needs It measures with the temperature difference and determines, NIt is maximumAccording to maximum quantity of wind and water by when mass values determine.
10. a kind of evaporative cooling system control method according to claim 8, which is characterized in that first temperature threshold Value T1It is 16 DEG C, the second temperature threshold value T2It is 20 DEG C, the third temperature threshold T3It is 30 DEG C.
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