CN114111101B - Evaporative cooling chiller and method for operating the same - Google Patents

Evaporative cooling chiller and method for operating the same Download PDF

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Publication number
CN114111101B
CN114111101B CN202111638448.2A CN202111638448A CN114111101B CN 114111101 B CN114111101 B CN 114111101B CN 202111638448 A CN202111638448 A CN 202111638448A CN 114111101 B CN114111101 B CN 114111101B
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China
Prior art keywords
cooling
heat exchange
channel
evaporative
precooling
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CN202111638448.2A
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CN114111101A (en
Inventor
陶锴
吴烨
吴刚
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Shenzhen Envicool Technology Co Ltd
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Shenzhen Envicool Technology Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
    • 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
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • 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
    • F24F5/0035—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 evaporation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B19/00—Machines, plants or systems, using evaporation of a refrigerant but without recovery of the vapour
    • F25B19/02—Machines, plants or systems, using evaporation of a refrigerant but without recovery of the vapour using fluid jet, e.g. of steam
    • F25B19/04—Machines, plants or systems, using evaporation of a refrigerant but without recovery of the vapour using fluid jet, e.g. of steam using liquid jet, e.g. of water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Signal Processing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Hardware Design (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)
  • Other Air-Conditioning Systems (AREA)

Abstract

The invention discloses an evaporative cooling water chilling unit which comprises a mechanical refrigeration system, an evaporative cooling system, a cooling channel inlet and a cooling channel outlet, wherein a refrigeration module of the mechanical refrigeration system is provided with a first heat exchange channel, a heat exchange module of the evaporative cooling system is provided with a second heat exchange channel, and the evaporative cooling water chilling unit further comprises a control valve group, wherein the control valve group can selectively enable one or both of the second heat exchange channel and the first heat exchange channel to be connected in series in sequence and then be communicated between the cooling channel inlet and the cooling channel outlet. Such as when the outdoor temperature is too low, which in turn causes the chilled water in the evaporative cooling system to be at risk of icing, the control valve bank may be operated such that only the mechanical refrigeration system is used to cool the cooling object. Therefore, the evaporative cooling water chilling unit can effectively solve the problem that the use effect of the evaporative cooling water chilling unit is poor. The invention also discloses an operation method of the evaporative cooling water chilling unit.

Description

Evaporative cooling water chilling unit and operation method thereof
Technical Field
The invention relates to the technical field of temperature regulation, in particular to an evaporative cooling water chilling unit and an operation method of the evaporative cooling water chilling unit.
Background
With the rapid development of science and technology, new domestic infrastructure is developed, and the construction speed and the construction scale of data centers are increased. The rapid growth in data center size is followed by a tremendous energy consumption, with refrigeration system energy consumption accounting for about 40% of the total data center energy consumption. Along with the approaching of the global 'carbon neutralization' target, the energy conservation and emission reduction requirements of the data center industry are increased, the energy consumption standard of a newly built data center is higher and higher, and the requirements on novel, reliable, energy-saving and rapid-deployment data center cooling products are provided.
At present, the indirect evaporative cooling technology and the related products of brief introduction of the evaporative cooling cold water technology are applied to a data center, so that a certain energy-saving effect is achieved, and certain importance and popularization are also brought to the industry. Through long-term research of the inventor, the special cooling system designed for cooling the data center is still lacking at present for low-temperature environments such as environments with lower temperature throughout the year or environments with lower temperature in winter due to seasonal changes. If the data center is directly cooled by directly introducing cold air outside the data center, damage to the data center equipment is likely to occur due to the high humidity of the outdoor air, and the method has environmental uncontrollability.
In summary, how to effectively solve the problem of poor use effect of the evaporative cooling water chiller is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
In view of the foregoing, a first object of the present invention is to provide an evaporative cooling water chiller, which can effectively solve the problem of poor usage effect of the evaporative cooling water chiller, and a second object of the present invention is to provide an operation method of the evaporative cooling water chiller.
In order to achieve the first object, the present invention provides the following technical solutions:
the evaporative cooling water chilling unit comprises a mechanical refrigeration system, an evaporative cooling system, a cooling channel inlet and a cooling channel outlet, wherein a refrigeration module of the mechanical refrigeration system is provided with a first heat exchange channel, a heat exchange module of the evaporative cooling system is provided with a second heat exchange channel, and the evaporative cooling water chilling unit further comprises a control valve group, wherein the control valve group can selectively enable one or both of the second heat exchange channel and the first heat exchange channel to be connected in series in sequence and then be communicated between the cooling channel inlet and the cooling channel outlet.
In the evaporative cooling water unit, when the evaporative cooling water unit is used, the control valve set can be operated according to the outdoor temperature, such as when the outdoor temperature is too low, and freezing water in the evaporative cooling system is in icing risk, so that only the first heat exchange channel is connected in series between the cooling channel inlet and the cooling channel outlet, and then the mechanical refrigeration system is started to refrigerate a cooling object. If the outdoor temperature is higher, the evaporative cooling system is not frozen, the control valve group is operated, so that only the second heat exchange channel is connected in series between the cooling channel inlet and the cooling channel outlet, then the evaporative cooling system is started, and the mechanical refrigerating system is closed, so that the evaporative cooling system is used for refrigerating a cooling object. When the outdoor temperature is higher, and the refrigeration of the evaporative cooling system cannot meet the requirement, the control valve group is operated to enable the first heat exchange channel and the second heat exchange channel to be connected in series so as to be connected between the cooling channel inlet and the cooling channel outlet, and then the evaporative cooling system and the mechanical refrigeration system are started at the same time so as to refrigerate a cooling object. In conclusion, the evaporative cooling water chilling unit can effectively solve the problem that the use effect of the evaporative cooling water chilling unit is poor.
Preferably, the mechanical refrigeration system comprises a compressor, a condenser and a throttling element which are sequentially communicated, wherein an outlet of the throttling element is communicated with a refrigerant channel of the refrigeration module, an outlet of the refrigerant channel is communicated with an inlet of the compressor, the refrigerant channel is in heat exchange contact with the first heat exchange channel, a first one-way valve and the compressor which are arranged in parallel are arranged between the refrigeration module and the condenser, and a second one-way valve and a refrigerant pump which are arranged in parallel are arranged between the throttling element and the condenser.
The controller is used for controlling the control valve group, when the outdoor dry bulb temperature is smaller than a first preset temperature, the controller is used for controlling the control valve group to enable the first heat exchange channel to be communicated between the cooling channel inlet and the cooling channel outlet, controlling the pump body of the evaporative cooling system to stop working, controlling the refrigerant pump to be started and the compressor to be closed, when the outdoor wet bulb temperature is between the first preset temperature and a second preset temperature, controlling the control valve group to enable the second heat exchange channel to be communicated between the cooling channel inlet and the cooling channel outlet, controlling the refrigerant pump and the compressor to be closed, controlling the evaporative cooling system to be started, and when the outdoor wet bulb temperature is larger than a second preset temperature, controlling the control valve group to enable the cooling channel inlet, the second heat exchange channel, the first heat exchange channel and the cooling channel outlet to be sequentially communicated, controlling the evaporative cooling system to be opened and controlling the compressor to be opened.
Preferably, the inlet of the cooling channel is respectively communicated with the inlet of the second heat exchange channel through a first switch valve and is communicated with an intermediate port through a second switch valve, the outlet of the second heat exchange channel is communicated with the intermediate port, the intermediate port is respectively communicated with the inlet of the first heat exchange channel through a third switch valve and is communicated with the outlet of the cooling channel through a fourth switch valve, and the outlet of the first heat exchange channel is communicated with the outlet of the cooling channel.
Preferably, the first switch valve, the second switch valve, the third switch valve and the fourth switch valve are all electric valves.
Preferably, the evaporative cooling system comprises a pre-cooling device for pre-cooling ambient air and a main cooling device for cooling water by the air cooled by the pre-cooling device.
Preferably, the pre-cooling device comprises a pre-cooling fan, a pre-cooling spray pipe, a pre-cooling evaporation heat exchange core, a pre-cooling water receiving disc and a pre-cooling water pump, wherein the pre-cooling spray pipe is used for spraying water to the pre-cooling evaporation heat exchange core, the pre-cooling water receiving disc is used for collecting water sprayed by the pre-cooling spray pipe, the pre-cooling fan is used for driving air to flow through the evaporation heat exchange core, and the pre-cooling water pump is used for driving water in the pre-cooling water receiving disc to be conveyed to the pre-cooling spray pipe.
The main cooling device comprises a main fan, a main spray pipe, direct evaporation heat exchange filler, a main water receiving disc and a main cooling pump, wherein the main cooling pump is used for pumping cooling water in the main water receiving disc to a cooling water channel of the heat exchange module, an outlet of the cooling water channel is communicated with the main spray pipe, the cooling water channel is in heat exchange contact with the second heat exchange channel, the main spray pipe is used for spraying cooling water to the direct evaporation heat exchange filler, the main water receiving disc is used for collecting cooling water flowing through the direct evaporation heat exchange filler, and the main fan is used for driving air flow cooled by the precooling device to flow through the direct evaporation heat exchange filler.
Preferably, the pre-cooling apparatus is a cooling coil.
Preferably, the main cooling device has at least two air inlets, each air inlet being provided with the pre-cooling device.
Preferably, the heat exchange module is a plate heat exchanger, and the refrigeration module is one of a flooded evaporator, a falling film evaporator, a shell and tube evaporator and a plate heat exchanger.
In order to achieve the second purpose, the invention also provides an operation method of the evaporative cooling water chilling unit, which comprises the following steps of starting a natural cooling cycle of a mechanical refrigeration system and closing the evaporative cooling system when judging whether the outdoor dry bulb temperature is smaller than a first preset value, starting the evaporative cooling system and closing the mechanical refrigeration system when judging whether the outdoor wet bulb temperature is between the first preset value and a second preset value, and starting the evaporative cooling system and starting a compression cooling cycle of the mechanical refrigeration system when judging that the outdoor wet bulb temperature is larger than the second preset value. The operation method of the evaporative cooling water chilling unit is mainly applied to any one of the evaporative cooling water chilling units. Because the evaporative cooling water chilling unit has the technical effects, the operation method of the evaporative cooling water chilling unit also has the corresponding technical effects.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram illustrating the operation of an evaporative cooling chiller when a mechanical refrigeration system provided by an embodiment of the present invention enters a working state;
FIG. 2 is a schematic diagram illustrating the operation of the evaporative cooling chiller when the evaporative cooling system provided by the embodiment of the present invention enters a working state;
FIG. 3 is a schematic diagram illustrating the operation of an evaporative cooling chiller when the evaporative cooling system and the mechanical refrigeration system provided by the embodiment of the invention simultaneously enter a working state;
Fig. 4 is a flowchart of an operation method of an evaporative cooling chiller according to an embodiment of the present invention.
The figures are marked as follows:
1. A main fan; 2, a precooling blower, 3, a precooling spray pipe, 4, a precooling evaporation heat exchange core body, 5, an air inlet grid, 6, a precooling water pump, 7, a condenser, 8, a water receiving disc, 9, a main spray pipe, 10, a direct evaporation heat exchange filler, 11, a first one-way valve, 12, a refrigerant pump, 13, a precooling water receiving disc, 14, a throttling element, 15, a refrigerating module, 16, a compressor, 17, a main cold pump, 18, a heat exchange module, 19, a cooling pump, 20, a first switching valve, 21, a second switching valve, 22, a third switching valve, 23, a fourth switching valve, 24, a liquid level switch, 25, a fourth one-way valve, 26, a third one-way valve, 27, a second one-way valve, 28, a middle opening, 29, a main water receiving disc, 30, a cooling channel inlet, 31 and a cooling channel outlet.
Detailed Description
The embodiment of the invention discloses an evaporative cooling water chilling unit, which is used for effectively solving the problem of poor use effect of the evaporative cooling water chilling unit.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 4, fig. 1 is a schematic operation diagram of an evaporative cooling chiller according to an embodiment of the present invention, fig. 2 is a schematic operation diagram of an evaporative cooling chiller according to an embodiment of the present invention when an evaporative cooling system is in an operating state, fig. 3 is a schematic operation diagram of an evaporative cooling chiller according to an embodiment of the present invention when an evaporative cooling system and a mechanical refrigeration system are simultaneously in an operating state, and fig. 4 is a flowchart of an operation method of an evaporative cooling chiller according to an embodiment of the present invention.
In a specific embodiment, the present embodiment provides an evaporative cooling water chiller, where the evaporative cooling water chiller mainly guides a cooling fluid to a target cooling object through a cooling channel, and after the cooling fluid absorbs heat from the target cooling object, the cooling fluid is then guided back to the evaporative cooling water chiller to cool and then guide the cooling fluid to the target cooling object again, and of course, the evaporative cooling water chiller is also suitable for heating the target object through the cooling channel. The evaporative cooling chiller includes a mechanical refrigeration system, an evaporative cooling system, a cooling channel inlet 30, and a cooling channel outlet 31.
Wherein a mechanical refrigeration system, as is currently common, mainly comprises a compressor 16, a condenser 7, a throttling element 14 and an evaporator, wherein the evaporator, as a refrigeration module 15 of the mechanical refrigeration system, has a refrigerant channel and a first heat exchange channel in heat exchanging contact with each other, wherein the refrigerant channel refers to the channel connected in series between the throttling element 14 and the compressor 16. To release a low temperature fluid through the throttling element 14 into the refrigerant passage to absorb heat from the first heat exchange passage and then to the compressor 16 when the mechanical refrigeration system is in operation. Specifically, the mechanical refrigeration system structure is not particularly limited, and the refrigeration module 15 capable of refrigerating is provided, so that the heat of the fluid flowing through the first heat exchange channel in the refrigeration module 15 can be absorbed.
The evaporating cooling system is mainly used for cooling water in a wind body to obtain low-temperature fluid. Specifically, the evaporative cooling system generally comprises a fan, a spray pipe, an evaporative heat exchange core body, a water receiving disc, a water pump and a heat exchange module 18, wherein the fan, the spray pipe, the evaporative heat exchange core body and the water receiving disc are sequentially arranged from top to bottom, the heat exchange module 18 is provided with a cooling water channel and a second heat exchange channel which are in heat conduction contact with each other, the water pump is used for pumping cooling water in the water receiving disc to the cooling water channel, then absorbs heat from the second heat exchange channel, cooling water in the cooling water channel absorbs heat and flows into the spray pipe, the spray pipe sprays cooling water into the evaporative heat exchange core body, at the moment, the fan is used for accelerating outside air or cooled air to flow through the evaporative heat exchange core body, so that the cooling water is evaporated, part of the cooling water is evaporated to take away heat, so that residual cooling water is cooled, and then flows into the water receiving disc downwards. The specific evaporative cooling system structure and its structural connection are not specifically limited herein, so that the evaporative cooling can be performed by the cooling water in the external environment, so that the low-temperature fluid flows into the cooling water channel of the heat exchange module 18, so that the fluid flowing through the second heat exchange channel of the heat exchange module 18 can absorb heat. Wherein the heat exchange module 18 is preferably a plate heat exchanger, and wherein the refrigeration module 15 is one of a flooded evaporator, a falling film evaporator, a shell and tube evaporator, and a plate heat exchanger.
Here, it is preferable to further include a control valve group having one end communicating with the cooling passage inlet 30 and the cooling passage outlet 31 and the other end communicating with both ends of the first heat exchanging passage and both ends of the second heat exchanging passage. Optionally, the second heat exchange channel and the first heat exchange channel are connected in series after being connected in series, and then are communicated with the cooling channel inlet 30 and the cooling channel outlet 31 through the valve position adjustment, such as switching, transposition and the like, of the control valve group. The control valve group can be operated to enable the second heat exchange channel to be communicated between the cooling channel inlet 30 and the cooling channel outlet 31 when only the evaporative cooling system is required to refrigerate, the control valve group can be operated to enable the first heat exchange channel to be communicated between the cooling channel inlet 30 and the cooling channel outlet 31 when only the mechanical cooling system is required to refrigerate, and the control valve group can be operated to enable the second heat exchange channel to be communicated between the cooling channel inlet 30 and the cooling channel outlet 31 after the second heat exchange channel and the first heat exchange channel are connected in series when the mechanical cooling system is required to refrigerate and the evaporative cooling system is required to refrigerate, wherein the communication mode after the second heat exchange channel and the first heat exchange channel are connected in series can be that the cooling channel inlet 30, the first heat exchange channel, the second heat exchange channel and the cooling channel outlet 31 are sequentially communicated, or that the cooling channel inlet 30, the second heat exchange channel and the first heat exchange channel outlet 31 are sequentially communicated, and the latter communication mode is generally preferred. Wherein the cooling channel inlet 30 is typically provided with a cooling pump 19 to accelerate the internal cooling fluid flow.
In the evaporative cooling chiller, when in use, the control valve set may be operated such that only the first heat exchange channel is connected in series between the cooling channel inlet 30 and the cooling channel outlet 31, and then the mechanical refrigeration system is turned on to refrigerate the cooling object, depending on the outdoor temperature, for example, when the outdoor temperature is too low, thereby causing freezing risk of chilled water in the evaporative cooling system. When the outdoor temperature is slightly high, so that the evaporative cooling system is not frozen, the control valve group is operated, so that only the second heat exchange channel is connected in series between the cooling channel inlet 30 and the cooling channel outlet 31, then the evaporative cooling system is started, and the mechanical refrigeration system is closed, so that the evaporative cooling system is used for refrigerating a cooling object. When the outdoor temperature is higher and the refrigeration of the evaporative cooling system cannot meet the requirement, the control valve group is operated to connect the first heat exchange channel and the second heat exchange channel in series so as to connect the first heat exchange channel and the second heat exchange channel in series between the cooling channel inlet 30 and the cooling channel outlet 31, and then the evaporative cooling system and the mechanical refrigeration system are started at the same time so as to refrigerate a cooling object. In conclusion, the evaporative cooling water chilling unit can effectively solve the problem that the use effect of the evaporative cooling water chilling unit is poor.
As described above, the control valve group may be a reversing valve, for example, the reversing valve body may have a working inlet, a working outlet, a first inlet, a second outlet, and a second inlet, where the working inlet is communicated with the cooling channel inlet 30, the working outlet is communicated with the cooling channel outlet 31, the first outlet is communicated with the first heat exchange channel outlet, the second outlet is communicated with the second heat exchange channel outlet, the first inlet is communicated with the first heat exchange channel inlet, and the second inlet is communicated with the second heat exchange channel inlet. The valve core of the reversing valve is provided with at least three working positions, wherein the three working positions are respectively a first working position, a communication channel is arranged in the reversing valve core to enable a working inlet to be communicated with a first inlet, a communication channel is arranged in the reversing valve core to enable a working outlet to be communicated with a first outlet, a second inlet and a second outlet to be cut off, a mechanical refrigerating system enters a working state at the moment, a second working position, a communication channel is arranged in the reversing valve core to enable the working inlet to be communicated with the second inlet, a communication channel is arranged in the reversing valve core to enable the working outlet to be communicated with the first outlet, a first inlet and a first outlet to be communicated with the second outlet, and the evaporative cooling system and the mechanical refrigerating system enter the working state at the moment.
Of course, the control valve block may also comprise a plurality of individual valves for controlling, respectively, e.g. with a first switching valve 20, a second switching valve 21, a third switching valve 22 and a fourth switching valve 23. The specific communication mode is that the cooling channel inlet 30 is respectively communicated with the second heat exchange channel inlet through the first switch valve 20 and the intermediate port 28 through the second switch valve 21, the outlet of the second heat exchange channel is communicated with the intermediate port 28, the intermediate port 28 is respectively communicated with the inlet of the first heat exchange channel through the third switch valve 22 and the cooling channel outlet 31 through the fourth switch valve 23, and the outlet of the first heat exchange channel is communicated with the cooling channel outlet 31. The intermediate port 28 is added for convenience in describing the communication relationship, and a connection port is not necessarily required. So that the first switch valve 20 and the fourth switch valve 23 are controlled to be closed when the mechanical refrigeration system is required to enter the working state as shown in fig. 1, the second switch valve 21 and the third switch valve 22 are controlled to be opened when the mechanical refrigeration system is required to enter the working state as shown in fig. 2, the second switch valve 21 and the third switch valve 22 are controlled to be closed at the moment, the first switch valve 20 and the fourth switch valve 23 are controlled to be opened when the mechanical refrigeration system is required to enter the working state at the same time as shown in fig. 3, and the second switch valve 21 and the fourth switch valve 23 are controlled to be closed at the moment, and the first switch valve 20 and the third switch valve 22 are controlled to be opened at the moment.
For convenience of control, the present invention preferably further includes a controller, where the first switch valve 20, the second switch valve 21, the third switch valve 22, and the fourth switch valve 23 may be electric valves, and are all in control connection with the controller, where the control connection means that a control signal of the controller can be transmitted to the first switch valve 20, the second switch valve 21, the third switch valve 22, and the fourth switch valve 23 to control the opening and closing of the four switch valves respectively.
Specifically, two temperature values, namely a first preset temperature and a second preset temperature which are sequentially increased and are all higher than 0 ℃. When the outdoor wet bulb temperature is between the first preset temperature and the second preset temperature, the controller controls the second switch valve 21 and the third switch valve 22 to be closed, the first switch valve 20 and the fourth switch valve 23 to be opened, and when the outdoor wet bulb temperature is greater than the second preset temperature, the controller controls the second switch valve 21 and the third switch valve 22 to be closed, and the mechanical refrigeration system enters the working state, and when the outdoor wet bulb temperature is greater than the second preset temperature, the controller controls the second switch valve 21 and the fourth switch valve 23 to be closed, the first switch valve 20 and the third switch valve 22 to be opened, and the evaporative cooling system and the mechanical refrigeration system simultaneously enter the working state.
Further, for better evaporative cooling, it is preferred here that the evaporative cooling system comprises a pre-cooling device for pre-cooling ambient air and a main cooling device for cooling water with air cooled by said pre-cooling device. Specifically, the precooling equipment can be arranged on two sides or one side of the main cooling equipment, specifically, the main cooling equipment can be provided with at least two air inlets, and each air inlet is provided with the precooling equipment. The precooling equipment is a cooling coil, and the cooling coil can be used for replacing an indirect evaporative cooling core body to realize the precooling effect of outdoor high-humidity bulb air, wherein the cooling coil can be selected from but not limited to copper pipe coils, copper pipe fin coils, plate pipes, air-air heat exchangers and the like.
Specifically, the pre-cooling device may include a pre-cooling fan 2, a pre-cooling spray pipe 3, a pre-cooling evaporation heat exchange core 4, a pre-cooling water collector 13, and a pre-cooling water pump 6, where the pre-cooling fan 2, the pre-cooling spray pipe 3, the pre-cooling evaporation heat exchange core 4, and the pre-cooling water collector 13 may be sequentially arranged from top to bottom, or may be arranged in other manners.
The precooling spray pipe 3 is used for spraying water to the precooling evaporation heat exchange core 4, the precooling water receiving disc 13 is used for collecting water sprayed by the precooling spray pipe 3, the precooling fan 2 is used for driving air to flow through the evaporation heat exchange core 4, and the precooling water pump 6 is used for driving water in the precooling water receiving disc 13 to be conveyed to the precooling spray pipe 3.
The precooling evaporation heat exchange core 4 can also adopt direct evaporation heat exchange filler. An air inlet grille 5 is further arranged between the precooling evaporation heat exchange core 4 and the precooling water receiving disc 13, so that the air enters a cavity between the precooling evaporation heat exchange core 4 and the precooling water receiving disc 13.
Further, the main cooling device can include a main fan 1, a main spray pipe 9, a direct evaporation heat exchange filler 10, a main water receiving disc 29 and a main cooling pump 17, and the main fan 1, the main spray pipe 9, the direct evaporation heat exchange filler 10 and the main water receiving disc 29 can be sequentially arranged from top to bottom, or can be arranged in other modes. A water receiving tray 8 may be disposed between the main fan 1 and the main shower pipe 9, and a condenser 7 may be disposed between the water receiving tray 8 and the main fan 1. The main spray pipe 9 is used for spraying cooling water to the direct evaporation heat exchange packing 10, the main water receiving tray 29 is used for collecting the cooling water flowing through the direct evaporation heat exchange packing 10, and the main fan 1 is used for driving the air flow cooled by the precooling equipment to flow through the direct evaporation heat exchange packing 10. Wherein the direct evaporative heat exchange packing 10 may also employ an evaporative heat exchange core. The evaporative cooling system further comprises a main cooling pump 17, the main cooling pump 17 is used for pumping cooling water in the main water receiving disc 29 to a cooling water channel of the heat exchange module 18, namely, an inlet of the main cooling pump 17 is communicated with a water outlet of the main water receiving disc 29, an outlet of the main cooling pump 17 is communicated with the cooling water channel through a water pipe, and the main cooling pump 17 is generally lower than the main water receiving disc 29. The outlet of the cooling water channel is communicated with the main spray pipe 9, and the cooling water channel is in heat exchange contact with the second heat exchange channel. The air inlet of the precooling evaporation heat exchange core body 4 is used for introducing external air, and the air outlet is used for guiding air to the direct evaporation heat exchange filler 10.
When the air conditioner is used, outdoor air (primary air) is subjected to wet cooling through the precooling evaporation heat exchange core 4, so that the temperature of the primary rheumatism ball is reduced. The cooling water backwater in the main water receiving tray 29 is subjected to heat exchange with the high-temperature freezing backwater in the second heat exchange channel through the cooling water channel from the booster pump of the main cooling pump 17 to the heat exchange module 18, and then is uniformly sprayed on the surface of the direct evaporation heat exchange filler 10 through the main spray pipe 9, and the primary air cooled by the precooling evaporation heat exchange core body and the cooling water backwater on the surface of the direct evaporation heat exchange filler 19 are subjected to direct evaporation heat exchange at the moment, so that the temperature of the cooling water backwater is lower than the outdoor wet bulb temperature, and compared with the limit of the traditional cooling tower, only water with the temperature 2-3 ℃ higher than the wet bulb problem can be prepared, and the evaporation cooling system can prepare water with the temperature lower than the outdoor air wet bulb temperature (close to the dew point temperature) and can remarkably prolong the natural cooling service life.
Further, a liquid level switch 24 may be further disposed in the main water receiving tray 29 to control the main cooling pump 17 to stop operating when the liquid level in the main water receiving tray 29 is low.
Wherein the mechanical refrigeration system comprises a compressor 16, a condenser 7, a throttling element 14, which are in turn in fluid flow direction, and wherein the outlet of the throttling element 14 is in communication with a refrigerant channel of a refrigeration module 15, the outlet of which is in communication with the inlet of said compressor 16, which refrigerant channel is in heat exchanging contact with said first heat exchanging channel.
Further, in order to allow the refrigerant to flow to the condenser 7 without passing through the compressor 16, it is preferable here to have the first check valve 11, which is provided in parallel, between the refrigeration module 15 and the condenser 7, the compressor 16. The first check valve 11 is disposed in parallel with the compressor 16, so that the fluid flowing out of the refrigerant channel of the refrigeration module 15 may flow to the condenser 7 after being compressed by the compressor 16, or may flow directly to the condenser 7 through the first check valve 11 without passing through the compressor 16.
In order to accelerate the flow of the internal refrigerant, the second check valve 27 and the refrigerant pump 12 may be provided in parallel between the throttle element 14 and the condenser 7, so that the fluid flowing out of the condenser 7 may flow to the throttle element 14 after being pressurized by the refrigerant pump 12, or may flow to the throttle element directly through the second check valve 27 without passing through the refrigerant pump 12.
Specifically, when the outdoor dry bulb temperature is lower than a first preset temperature, the controller controls the control valve group to enable the second heat exchange channel to be communicated between the cooling channel inlet 30 and the cooling channel outlet 31, controls the mechanical refrigeration system to enter a working state, controls the evaporation refrigeration system to stop working, for example, enables the pump body to be closed, controls the refrigerant pump 12 to be opened and controls the compressor 16 to be closed so as to enable the mechanical refrigeration system to naturally circulate, when the outdoor wet bulb temperature is higher than a second preset temperature, controls the control valve group to enable the second heat exchange channel to be communicated between the cooling channel inlet 30 and the cooling channel outlet 31, controls the refrigerant pump 12 and the compressor 16 to be closed, controls the evaporation refrigeration system to be opened, for example, enables the pump body and the fan to be opened so as to enable the evaporation refrigeration system to enter the working state, and controls the control valve group to enable the cooling channel 30, the second heat exchange channel 31 and the compressor 16 to be opened and the mechanical refrigeration system to be sequentially communicated when the outdoor wet bulb temperature is higher than a second preset temperature, controls the control valve group to enable the cooling channel 30, the second heat exchange channel and the compressor 16 to be opened and the cooling system to be sequentially communicated with the cooling channel outlet 31.
When the outdoor wet bulb temperature is between the first preset temperature and the second preset temperature, the controller controls the second switch valve 21 and the third switch valve 22 to be closed, controls the first switch valve 20 and the fourth switch valve 23 to be closed, controls the second switch valve 21 and the third switch valve 22 to be opened, controls the pump body of the evaporative cooling system to be closed and controls the refrigerant pump 12 to be opened and controls the compressor 16 to be closed, and when the outdoor wet bulb temperature is between the first preset temperature and the second preset temperature, controls the second switch valve 21 and the third switch valve 22 to be closed, controls the first switch valve 20 and the fourth switch valve 23 to be opened, controls the refrigerant pump 12 and the compressor 16 to be closed, controls the pump body of the evaporative cooling system and the fan to be opened, and controls the first switch valve 20 and the third switch valve 22 to be opened and controls the evaporative cooling system to be opened when the outdoor wet bulb temperature is greater than the second preset temperature.
When the outdoor wet bulb temperature is too high, the mechanical refrigeration system is started when the outlet water temperature of the evaporative cooling system does not meet the design requirement, at the moment, the second switch valve 21 and the fourth switch valve 23 are closed, and the first switch valve 20 and the third switch valve 22 are opened. When the outdoor dry bulb temperature is too low, in order to avoid the risk of spraying a freezing pipe in winter, the mechanical refrigeration system naturally circulates, at the moment, the first switch valve 20 and the fourth switch valve 23 are closed, the second switch valve 21 and the third switch valve 22 are opened, after the gaseous refrigerant in the refrigerant channel of the refrigeration module 15 absorbs heat, the gaseous refrigerant directly enters the condenser 7 to release heat through the first one-way valve 11, and then the fluid flowing out of the condenser 7 is throttled and depressurized by the throttling element 14 after being boosted by the refrigerant pump 12, and then enters the refrigerant channel to absorb heat.
Further, the outlet of the compressor 16 may be serially connected with a third check valve 26 connected in parallel with the first check valve 11, so that the fluid flowing out of the outlet of the compressor 16 flows through the third check valve 26 to the condenser 7, and thus the fluid flowing out of the first check valve 11 is prevented from flowing back from the compressor 16. Further, the outlet of the refrigerant pump 12 is serially provided with a fourth check valve 25 connected in parallel with the second check valve 27, so that the fluid flowing out of the outlet of the refrigerant pump 12 needs to flow through the fourth check valve 25 to the throttling element 14, thereby avoiding the backflow of the fluid flowing out of the second check valve 27 from the refrigerant pump 12. Furthermore, in order to ensure the working efficiency of the throttle elements 14 in order to avoid damage to one throttle element 14, which would lead to a shutdown, it is preferred here that the two throttle elements 14 are arranged in parallel, i.e. in parallel between the condenser 7 and the refrigeration module 15. Wherein the condenser 7 is preferably arranged between the main fan 1 and the main shower pipe 9.
In a specific embodiment, the evaporative cooling system comprises the pre-cooling device and the main cooling device. And like the outdoor air wet bulb temperature tw, the outdoor dry bulb temperature td, the chilled water outlet water temperature set value t0, the cooling water pump outlet temperature set value t1, wherein t1< t0, the evaporator liquid level set value a% (10 < a < 90), the outdoor dry bulb temperature m, the wet bulb temperatures n, p (0 < m < n < p), the controller can be controlled in the following control manner.
And when the outdoor dry bulb temperature td is less than m, the mechanical refrigeration system is operated in a natural cooling mode. The first switch valve 20 and the fourth switch valve 23 are closed, the second switch valve 21 and the third switch valve 22 are opened, and the cooling water directly enters the first heat exchange channel of the refrigeration module 15 for heat exchange. At this time, after the main fan 1 on the upper side of the condenser 7 runs at full speed for a designated time, after judging that the liquid level in the refrigeration module 15 reaches a set value a%, the second switch valve 21 is opened, the first switch valve 20 is closed, and the main fan 1 is adjusted according to the set water outlet temperature. The cooling channel inlet 30 is adjusted to match the end load with the main pipe differential pressure and the throttling element 14 is adjusted to the set level PID. At the same time, the machine set realizes the operation without primary cooling water, the system has no freezing pipe and icing risk, and the water disc and primary water pipeline do not need to be provided with electric tracing, thus simplifying the pipeline design and maintenance and further saving energy consumption.
When the outdoor wet bulb temperature m < tw < n, the natural cooling mode of the mechanical refrigeration system can not meet the refrigeration requirement, and the operation of the evaporative cooling system can meet the cooling requirement, so that the mechanical refrigeration system can be switched to the direct evaporative cooling mode. The first switch valve 20 is opened, the second switch valve 21 is closed, the main cooling pump 17 is opened, and the main fan 1 runs at full speed. When the temperature of cooling water at the outlet of the main cooling pump 17 is detected to be less than or equal to t1, the fourth switch valve 23 is opened, the third switch valve 22 is closed, the main fan 1 is adjusted according to the set outlet water temperature, and the precooling fan 2 is kept closed. The unit provides the required refrigeration capacity by direct evaporation.
When the outdoor wet bulb temperature n < tw < p, as the outdoor wet bulb temperature rises, the direct evaporation of the main cooling equipment is insufficient to reduce the primary water to the target temperature, and at the moment, the precooling equipment is started to enable the indirect evaporation composite direct evaporation mode, after the outdoor air is subjected to the equal wet cooling of the precooling evaporation heat exchange core body, the wet bulb temperature is reduced, and then the outdoor air enters the direct evaporation heat exchange filler to exchange heat with the primary water backwater, so that primary water supply lower than the outdoor wet bulb temperature is obtained, and the required refrigerating capacity is complemented. And when the temperature of cooling water pumped out of the main cooling pump is detected to be less than or equal to t1, the precooling fan is matched with the main fan to rotate and adjust the speed ratio.
When the outdoor wet bulb temperature tw is more than p, as the outdoor wet bulb temperature continues to rise, the direct evaporation composite indirect evaporation cooling mode cannot meet the refrigeration requirement, when the unit water outlet temperature is more than t0, the mechanical cooling supplement is started, on the basis of the composite mode, the third switch valve 22 is opened, the fourth switch valve 23 is closed, the compressor 16 is started, the frequency of the compressor 16 is regulated according to the evaporation pressure, the main fan 1 is regulated according to the condensation pressure, and the precooling fan 2 is matched with the main fan 1 to rotate and is regulated according to the rotation speed of the main fan 1. With the reduction of the outdoor wet bulb temperature, the mechanical cool filling mode is gradually exited, the indirect evaporation and direct evaporation combined mode is carried out, the direct evaporation mode is carried out until the natural cooling mode of the fluorine pump is entered, the switching cycle of different modes of the system is completed, and the annual energy-saving operation of the unit is realized.
Based on the evaporative cooling water chilling unit provided by the embodiment, the invention further provides an operation method of the evaporative cooling water chilling unit, which comprises the following steps of starting a mechanical refrigeration system natural cooling cycle and closing the evaporative cooling system when judging whether the outdoor dry bulb temperature is smaller than a first preset value, starting the evaporative cooling system and closing the mechanical refrigeration system when judging whether the outdoor wet bulb temperature is between the first preset value and a second preset value, and starting the evaporative cooling system and starting the mechanical refrigeration system compression cooling cycle when judging that the outdoor wet bulb temperature is larger than the second preset value, wherein the step 100 is implemented by judging whether the outdoor dry bulb temperature is smaller than the first preset value or not. The operation method of the evaporative cooling water chilling unit is mainly applied to any one of the evaporative cooling water chilling units. Therefore, the operation method of the evaporative cooling chiller can be used for the beneficial effects of the above embodiments. It should be noted that, the steps 100 to 300 may be performed sequentially or may be performed out of order.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (11)

1.一种蒸发冷却冷水机组，包括机械制冷***、蒸发冷***、冷却通道进口和冷却通道出口，所述机械制冷***的制冷模块具有第一换热通道，所述蒸发冷***的换热模块具有第二换热通道，其特征在于，还包括控制阀组；所述控制阀组能够使：所述第二换热通道和所述第一换热通道择一或两者依次串联后，连通在所述冷却通道进口和所述冷却通道出口之间；还包括用于控制所述控制阀组的控制器；1. An evaporative cooling chiller, comprising a mechanical refrigeration system, an evaporative cooling system, a cooling channel inlet and a cooling channel outlet, wherein the refrigeration module of the mechanical refrigeration system has a first heat exchange channel, and the heat exchange module of the evaporative cooling system has a second heat exchange channel, characterized in that it also comprises a control valve group; the control valve group can make: the second heat exchange channel and the first heat exchange channel, one or both of which are sequentially connected in series, connected between the cooling channel inlet and the cooling channel outlet; and also comprises a controller for controlling the control valve group; 所述控制器在室外干球温度小于第一预设温度时：控制所述控制阀组以使所述第一换热通道连通在所述冷却通道进口和所述冷却通道出口之间，控制所述蒸发冷***停止工作，且控制制冷剂泵开启、压缩机关闭，以使得所述机械制冷***自然冷循环；When the outdoor dry-bulb temperature is less than a first preset temperature, the controller controls the control valve group to connect the first heat exchange channel between the cooling channel inlet and the cooling channel outlet, controls the evaporative cooling system to stop working, and controls the refrigerant pump to start and the compressor to stop, so that the mechanical refrigeration system performs a natural cooling cycle; 控制器在室外湿球温度位于第一预设温度和第二预设温度之间时：控制所述控制阀组以使所述第二换热通道连通在所述冷却通道进口和所述冷却通道出口之间，控制所述制冷剂泵以及所述压缩机关闭，控制所述蒸发冷***开启工作；When the outdoor wet-bulb temperature is between the first preset temperature and the second preset temperature, the controller controls the control valve group to connect the second heat exchange channel between the cooling channel inlet and the cooling channel outlet, controls the refrigerant pump and the compressor to be turned off, and controls the evaporative cooling system to start working; 控制器在室外湿球温度大于第二预设温度之间时：控制所述控制阀组以使所述冷却通道进口、所述第二换热通道、所述第一换热通道和所述冷却通道出口依次连通，控制所述蒸发冷***打开，且控制所述压缩机打开，以使机械制冷***压缩冷循环。When the outdoor wet-bulb temperature is greater than a second preset temperature, the controller controls the control valve group to connect the cooling channel inlet, the second heat exchange channel, the first heat exchange channel and the cooling channel outlet in sequence, controls the evaporative cooling system to open, and controls the compressor to open, so that the mechanical refrigeration system compresses the cooling cycle. 2.根据权利要求1所述的蒸发冷却冷水机组，其特征在于，所述机械制冷***包括依次连通的压缩机、冷凝器、节流元件，所述节流元件的出口与所述制冷模块的制冷剂通道连通，所述制冷剂通道的出口与所述压缩机的进口连通，所述制冷剂通道与所述第一换热通道换热接触；所述制冷模块与所述冷凝器之间具有并联设置的第一单向阀、压缩机，所述节流元件与所述冷凝器之间具有并联设置的第二单向阀、制冷剂泵。2. The evaporative cooling chiller according to claim 1 is characterized in that the mechanical refrigeration system includes a compressor, a condenser, and a throttling element connected in sequence, the outlet of the throttling element is connected to the refrigerant channel of the refrigeration module, the outlet of the refrigerant channel is connected to the inlet of the compressor, and the refrigerant channel is in heat exchange contact with the first heat exchange channel; a first one-way valve and a compressor are arranged in parallel between the refrigeration module and the condenser, and a second one-way valve and a refrigerant pump are arranged in parallel between the throttling element and the condenser. 3.根据权利要求1所述的蒸发冷却冷水机组，其特征在于，所述控制阀组包括第一开关阀、第二开关阀、第三开关阀和第四开关阀；所述冷却通道进口分别通过所述第一开关阀与所述第二换热通道进口连通，且通过所述第二开关阀与中间口连通；所述第二换热通道的出口与所述中间口连通；所述中间口分别通过所述第三开关阀与所述第一换热通道的进口连通，且通过所述第四开关阀与所述冷却通道出口连通；所述第一换热通道的出口与所述冷却通道的出口连通。3. The evaporative cooling chiller according to claim 1 is characterized in that the control valve group includes a first switch valve, a second switch valve, a third switch valve and a fourth switch valve; the inlet of the cooling channel is connected to the inlet of the second heat exchange channel through the first switch valve, and is connected to the middle port through the second switch valve; the outlet of the second heat exchange channel is connected to the middle port; the middle port is connected to the inlet of the first heat exchange channel through the third switch valve, and is connected to the outlet of the cooling channel through the fourth switch valve; the outlet of the first heat exchange channel is connected to the outlet of the cooling channel. 4.根据权利要求3所述的蒸发冷却冷水机组，其特征在于，所述第一开关阀、所述第二开关阀、所述第三开关阀以及所述第四开关阀均为电动阀。4 . The evaporative cooling chiller according to claim 3 , wherein the first switch valve, the second switch valve, the third switch valve and the fourth switch valve are all electric valves. 5.根据权利要求1-4任一项所述的蒸发冷却冷水机组，其特征在于，所述蒸发冷***包括用于对环境风进行预冷的预冷设备和利用所述预冷设备冷却的风对水进行冷却的主冷设备。5. The evaporative cooling chiller according to any one of claims 1 to 4, characterized in that the evaporative cooling system comprises a precooling device for precooling ambient air and a main cooling device for cooling water using the air cooled by the precooling device. 6.根据权利要求5所述的蒸发冷却冷水机组，其特征在于，所述预冷设备包括预冷风机、预冷喷淋管、预冷蒸发换热芯体、预冷接水盘以及预冷水泵，所述预冷喷淋管用于向所述预冷蒸发换热芯体喷淋水，所述预冷接水盘用于收集所述预冷喷淋管喷淋的水，所述预冷风机用于驱动空气流经所述蒸发换热芯体，所述预冷水泵用于驱动预冷接水盘中的水输送至所述预冷喷淋管。6. The evaporative cooling chiller according to claim 5 is characterized in that the precooling equipment includes a precooling fan, a precooling spray pipe, a precooling evaporative heat exchange core, a precooling water receiving tray and a precooling water pump, the precooling spray pipe is used to spray water onto the precooling evaporative heat exchange core, the precooling water receiving tray is used to collect the water sprayed by the precooling spray pipe, the precooling fan is used to drive air to flow through the evaporative heat exchange core, and the precooling water pump is used to drive the water in the precooling water receiving tray to be transported to the precooling spray pipe. 7.根据权利要求5所述的蒸发冷却冷水机组，其特征在于，所述主冷设备包括主风机、主喷淋管、直接蒸发换热填料、主接水盘和主冷泵，所述主冷泵用于将所述主接水盘中冷却水抽送至所述换热模块的冷却水通道，所述冷却水通道的出口与所述主喷淋管连通，所述冷却水通道与所述第二换热通道换热接触；所述主喷淋管用于向所述直接蒸发换热填料喷淋冷却水，所述主接水盘用于收集流经所述直接蒸发换热填料的冷却水，所述主风机用于驱动所述预冷设备冷却的风流流经所述直接蒸发换热填料。7. The evaporative cooling chiller according to claim 5 is characterized in that the main cooling equipment includes a main fan, a main spray pipe, a direct evaporative heat exchange filler, a main water receiving tray and a main cooling pump, the main cooling pump is used to pump cooling water in the main water receiving tray to the cooling water channel of the heat exchange module, the outlet of the cooling water channel is connected to the main spray pipe, and the cooling water channel is in heat exchange contact with the second heat exchange channel; the main spray pipe is used to spray cooling water to the direct evaporative heat exchange filler, the main water receiving tray is used to collect the cooling water flowing through the direct evaporative heat exchange filler, and the main fan is used to drive the cooling airflow of the pre-cooling equipment to flow through the direct evaporative heat exchange filler. 8.根据权利要求7所述的蒸发冷却冷水机组，其特征在于，所述预冷设备为冷却盘管。8. The evaporative cooling chiller according to claim 7, characterized in that the precooling device is a cooling coil. 9.根据权利要求8所述的蒸发冷却冷水机组，其特征在于，所述主冷设备具有至少两个进风口，每个进风口均设置有所述预冷设备。9. The evaporative cooling chiller according to claim 8, characterized in that the main cooling device has at least two air inlets, and each air inlet is provided with the pre-cooling device. 10.根据权利要求1-4任一项所述的蒸发冷却冷水机组，其特征在于，所述换热模块为板式换热器，所述制冷模块为满液式蒸发器、降膜式蒸发器、壳管式蒸发器、板式换热器中的一种。10. The evaporative cooling chiller according to any one of claims 1 to 4, characterized in that the heat exchange module is a plate heat exchanger, and the refrigeration module is one of a flooded evaporator, a falling film evaporator, a shell and tube evaporator, and a plate heat exchanger. 11.一种蒸发冷却冷水机组运行方法，其特征在于，基于权利要求要求1-10任一项所述的蒸发冷却冷水机组运行，包括如下步骤：11. An evaporative cooling chiller operation method, characterized in that the evaporative cooling chiller operation according to any one of claims 1 to 10 comprises the following steps: 判断室外干球温度小于第一预设值时，启动机械制冷***自然冷循环，且使蒸发冷***关闭；判断室外湿球温度位于所述第一预设值与第二预设值之间时，启动所述蒸发冷***，且关闭所述机械制冷***；判断室外湿球温度大于所述第二预设值时，启动所述蒸发冷***，且启动所述机械制冷***压缩冷循环。When it is determined that the outdoor dry-bulb temperature is less than a first preset value, the natural cooling cycle of the mechanical refrigeration system is started, and the evaporative cooling system is turned off; when it is determined that the outdoor wet-bulb temperature is between the first preset value and the second preset value, the evaporative cooling system is started, and the mechanical refrigeration system is turned off; when it is determined that the outdoor wet-bulb temperature is greater than the second preset value, the evaporative cooling system is started, and the compression cooling cycle of the mechanical refrigeration system is started.
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CN111219819A (en) * 2020-01-17 2020-06-02 河北秦淮数据有限公司 Refrigeration system
CN217636258U (en) * 2021-12-29 2022-10-21 深圳市英维克科技股份有限公司 Evaporative cooling water chilling unit

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