CN215529686U - A cold water cooling station system - Google Patents
A cold water cooling station system Download PDFInfo
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- CN215529686U CN215529686U CN202121290489.2U CN202121290489U CN215529686U CN 215529686 U CN215529686 U CN 215529686U CN 202121290489 U CN202121290489 U CN 202121290489U CN 215529686 U CN215529686 U CN 215529686U
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Abstract
The utility model discloses a cold water type cold station system, which comprises a tail end unit and a cold station unit, wherein the cold station unit is used for providing cold energy for the tail end unit; the cold station unit comprises a mechanical refrigerating device and an indirect evaporative cooling device, the mechanical refrigerating device comprises a compressor, a first heat exchanger, a liquid pump, an expansion valve and a second heat exchanger which are sequentially connected in series, the compressor is connected with a first one-way valve in parallel, the liquid pump is connected with a second one-way valve in parallel, and the indirect evaporative cooling device is connected with the first heat exchanger to realize heat exchange between the indirect evaporative cooling device and the mechanical refrigerating device; the tail end unit at least comprises an evaporator, and the evaporator is connected with the second heat exchanger to receive cold energy provided by the cold station unit; the compressor, the heat exchanger and the liquid pump are integrated into an integrated structure to form an integrated cold station unit, so that the integrated cold station unit is convenient to install; the compressor can run in different modes according to different working conditions, a natural cold source is fully utilized, and the running time of the compressor is reduced, so that the aim of low energy consumption is fulfilled.
Description
Technical Field
The utility model relates to the technical field of machine room air conditioners, in particular to a cold water type cold station system
Background
With the promotion and promotion of a series of informatization projects such as ' internet + ' big data application ', the scale and the quantity of data centers are rapidly developed and become power utilization consumers of an information society.
The data center provides great convenience for the development of the modern society, and meanwhile, the power consumption of the data center is high. According to statistics, the electricity consumption of the modern social data center accounts for 5% of the total electricity of the whole society. In 2017, the electricity consumption of the China data center exceeds 1250 hundred million kilowatts, and the electricity generation of the three gorges dam and the Gezhou dam is integrated.
In order to reduce the energy consumption of the data center and reasonably configure social resources, the energy consumption of the data center needs to be optimized, and related policies are successively issued by the nation to clearly specify the energy consumption of the data center, such as cities in Beijing, Shanghai, Guangzhou, Shenzhen, Hangzhou and the like, and the energy consumption of newly-built data centers is required to be controlled within 1.3, even within 1.25.
In order to reduce the energy consumption of the data center, the most direct and effective mode is to reduce the energy consumption of an air conditioning system of the data center, wherein a natural cold source is fully utilized as a preferred mode, the natural cold source utilization modes comprise fresh air, evaporative cooling, heat pipes and the like, and the fresh air and direct evaporative cooling can influence the air quality of the data center, so that the industry mainly turns to indirect evaporative cooling technology and heat pipe technology, including liquid pump driving heat pipes and air pump driving heat pipes.
The existing fluorine pump air conditioner technology is mainly applied to the traditional machine room air conditioner, is not combined with a water chilling unit and the like, adopts the traditional water cooling technology, has high energy consumption and quite high water consumption, and generally adopts a water chilling unit cooling system, the tail end of the water chilling unit cooling system adopts chilled water, and for part of customers, the potential safety hazard can be brought when water enters the machine room.
Therefore, how to solve the problems of high energy consumption and potential safety hazard of the existing fluorine pump air conditioner is a problem to be solved urgently by technical personnel in the field at present.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a cold water type cold station system, which can operate in different modes according to different working conditions, so as to reduce energy consumption, and meanwhile, the cold station unit and the end unit exchange heat through a water side heat exchanger, so as to prevent the cold station unit from directly sending chilled water into the end unit, prevent the chilled water from entering a data center machine room, and eliminate potential safety hazards.
In order to achieve the above purpose, the utility model provides the following technical scheme:
a cold water type cold station system comprising a terminal unit and a cold station unit for providing cold to the terminal unit;
the cold station unit comprises a mechanical refrigerating device and an indirect evaporative cooling device, the mechanical refrigerating device comprises a compressor, a first heat exchanger, a liquid pump, an expansion valve and a second heat exchanger which are sequentially connected in series, the compressor is connected with a first one-way valve in parallel, the liquid pump is connected with a second one-way valve in parallel, and the indirect evaporative cooling device is connected with the first heat exchanger to realize heat exchange between the indirect evaporative cooling device and the mechanical refrigerating device;
the terminal unit at least comprises an evaporator, and the evaporator is connected with the second heat exchanger to receive cold energy provided by the cold station unit.
Preferably, the outlet end of the compressor is also connected in series with a third one-way valve, and the outlet end of the liquid pump is connected in series with a fourth one-way valve.
Preferably, the mechanical refrigeration device further comprises an accumulator, and the accumulator is arranged between the first heat exchanger and the liquid pump.
Preferably, the cooling water system comprises a sprayer, a cooler, a water pump and a water pan, wherein the water pan is used for receiving cooling water sprayed to the cooler by the sprayer, the sprayer is communicated with the water pan through the first heat exchanger, the water pump is used for conveying the cooling water in the water pan to the sprayer, and the cooling water conveyed to the sprayer from the water pan is subjected to heat exchange with chilled water flowing through the first heat exchanger in the mechanical refrigeration device when flowing through the first heat exchanger.
Preferably, the air conditioner further comprises a preheating heat exchanger for heating the air flowing to the cooler, and the preheating heat exchanger is arranged between the sprayer and the first heat exchanger in parallel.
Preferably, the water dispenser further comprises a precooling heat exchanger for cooling air flowing to the cooler, the input end of the precooling heat exchanger is communicated with the water pan, and the output end of the precooling heat exchanger is communicated with the sprayer.
Preferably, the indirect evaporative cooling system further comprises an outdoor fan for driving air through the cooler.
Preferably, the terminal unit further comprises a power pump and an indoor fan, the power pump is arranged between the evaporator and the second heat exchanger, and the indoor fan is used for driving air to flow through the evaporator.
Preferably, the evaporators are arranged in parallel, and the input end of each evaporator is provided with a water valve.
Preferably, the compressor is a variable capacity centrifugal compressor, the input end of the compressor is further connected with a bypass pipeline, and one end of the bypass pipeline, which is far away from the compressor, is connected to a pipeline between the liquid pump and the expansion valve.
According to the cold water type cold station system, the machine room is cooled through the tail end unit, and the tail end unit is cooled through the cold station unit, so that chilled water in the cold station unit cannot enter a data center, the cooling safety is ensured, and potential safety hazards are eliminated; the compressor, the condenser, the liquid storage device and the liquid pump are integrated into a whole structure to form an integrated cold station unit, so that the integrated cold station unit is convenient to install; the compressor can run in different modes according to different working conditions, a natural cold source is fully utilized, and the running time of the compressor is reduced, so that the aim of low energy consumption is fulfilled.
When the outdoor temperature is high, the natural cold source is not enough, the refrigeration mode is operated, the controller controls the compressor to be fully opened, the liquid pump is closed, and the refrigerant circulation is realized through the compressor;
when the outdoor temperature is moderate, the mixed mode is operated, the controller controls the speed-regulating operation of the compressor and the operation of the liquid pump, and the liquid pump assists the compressor to realize refrigerant circulation;
when the outdoor temperature is low, the natural cold source is enough, so that the compressor does not need to be operated, the heat pipe mode is operated, the controller controls the compressor to be closed, the liquid pump is opened, and the refrigerant circulation can be realized only through the liquid pump.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of a first embodiment of a cold water type cold station system provided by the present invention;
fig. 2 is a schematic diagram of a cold water type cold station system according to a second embodiment of the present invention.
The system comprises a 10-tail end unit, a 11-evaporator, a 12-water valve, a 13-power pump, a 14-indoor fan, a 20-cold station unit, a 21-compressor, a 22-first heat exchanger, a 23-liquid storage device, a 24-liquid pump, a 25-expansion valve, a 26-third one-way valve, a 27-first one-way valve, a 28-fourth one-way valve, a 29-second one-way valve, a 30-indirect evaporative cooling device, a 31-preheating heat exchanger, a 32-water pump, a 33-precooling heat exchanger, a 34-sprayer, a 35-outdoor fan, a 36-water pan, a 40-second heat exchanger, a 50-bypass pipeline, a 60-cooler and a 70-mechanical refrigerating device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The core of the utility model is to provide a cold water type cold station system which can run in different modes according to different working conditions, so that the energy consumption is reduced, meanwhile, the cold station units and the tail end unit exchange heat through the water side heat exchanger, the cold station units are prevented from directly sending chilled water into the tail end unit, the chilled water is prevented from entering a data center machine room, and the potential safety hazard is eliminated.
Referring to fig. 1 to 2, fig. 1 is a schematic diagram illustrating a cold water type cold station system according to a first embodiment of the present invention; fig. 2 is a schematic diagram of a cold water type cold station system according to a second embodiment of the present invention.
The cold water type cold station system provided by the utility model comprises a tail end unit 10 and a cold station unit 20 for providing cold energy to the tail end unit 10;
the end unit 10 at least comprises an evaporator 11, and the evaporator 11 is connected with the second heat exchanger 40 to receive the cold energy provided by the cold station unit 20;
the cold station unit 20 comprises a mechanical refrigeration device 70 and an indirect evaporative cooling device 30, wherein the mechanical refrigeration device 70 comprises a compressor 21, a first heat exchanger 22, a liquid pump 24, an expansion valve 25 and a second heat exchanger 40 which are sequentially connected in series, the compressor 21 is connected with a first one-way valve 27 in parallel, the liquid pump 24 is connected with a second one-way valve 29 in parallel, and the indirect evaporative cooling device 30 is connected with the first heat exchanger 22 to realize heat exchange between the indirect evaporative cooling device 30 and the mechanical refrigeration device 70.
Wherein, end unit 10 is used for cooling down the data center computer lab, second heat exchanger 40 has mutual independence and can carry out the first heat transfer passageway and the second heat transfer passageway of heat exchange each other, coolant in end unit 10 passes through the first heat transfer passageway and the evaporimeter 11 of second heat exchanger 40, cold station unit 20 is used for carrying the second heat transfer passageway to second heat exchanger 40 with the refrigerated water, carry out the heat transfer with the cooling working medium in end unit 10, realize the cooling to end unit 10 coolant, coolant after the cooling passes through evaporimeter 11, the gasification heat absorption, carry out the heat exchange with the air in the computer lab, reach cryogenic effect. When installed, the end unit 10 and the cold station unit 20 are disposed indoors and outdoors, respectively, in the data center.
As shown in fig. 1, the indirect evaporative cooling chilled water type integrated cold station system provided by the present invention can operate different modes according to different working conditions to achieve the purpose of low energy consumption, and can respectively switch between a refrigeration mode, a hybrid mode and a heat pipe mode according to outdoor temperature and indoor load in one system, and has no control dead zone, and the specific control modes refer to the following:
a refrigeration mode: when the outdoor wet bulb temperature is higher than a certain temperature, for example, higher than 20 ℃, the refrigeration mode is operated, the compressor 21 is fully opened, the liquid pump 24 is closed, at this time, since the outdoor temperature is high, the high-temperature and high-pressure gaseous chilled water needs to be discharged to the first heat exchanger 22 by means of pressurization of the compressor 21, and the high-temperature and high-pressure gaseous chilled water becomes high-pressure liquid chilled water after passing through the first heat exchanger 22, the compressor 21 is fully opened, has enough power, does not need to operate the liquid pump 24, is throttled and depressurized by the expansion valve 25 to become low-temperature low-pressure gas-liquid mixed chilled water, exchanges heat with the cooling medium of the terminal unit 10 in the second heat exchanger 40, for the purpose of cooling the cooling medium of the terminal unit 10, and after passing through the second heat exchanger 40, the gas-liquid mixed chilled water is changed into superheated gaseous chilled water, and the gaseous chilled water is sucked and compressed by the compressor 21 again, and the cycle is repeated to provide cold energy for the data center.
Mixed mode: when the outdoor wet bulb temperature is in a certain temperature range, for example 10-20 ℃, the mixed mode is operated, and the liquid pump 24 and the compressor 21 are both half-opened and run together. Because the ambient temperature is lower at this moment, possess certain degree nature cold source, compressor 21 is suitable pressure boost and can be accomplished the condensation under the effect of first heat exchanger 22, and compressor 21 pressure differential is little at this moment, needs liquid pump 24 operation, and supplementary compressor 21 provides power to and the intensive circulation, and the refrigerated water is carried to second heat exchanger 40 and is refrigerated terminal unit 10 equally.
Heat pipe mode: when the outdoor wet bulb temperature is lower than a certain temperature, for example, 10 ℃, the heat pipe mode is operated, the liquid pump 24 is fully turned on, and the compressor 21 is turned off. At this time, the outdoor natural cold source is enough, condensation can be completed under the action of the first heat exchanger 22 without operating the compressor 21, that is, only the liquid pump 24 is operated to convey the chilled water to the tail end evaporator 11 for refrigeration, so that refrigeration by the compressor 21 is not needed, power circulation is completed by the liquid pump 24, and energy conservation is realized.
According to the cold water type cold station system provided by the utility model, the machine room is cooled through the tail end unit 10, and the tail end unit 10 is cooled through the cold station unit 20, so that chilled water in the cold station unit 20 cannot enter a data center, the cooling safety is ensured, and potential safety hazards are eliminated; the compressor 21, the first heat exchanger 22 and the liquid pump 24 are integrated into a whole structure to form the integrated cold station unit 20, so that the installation is convenient; the natural cold source can be fully utilized according to different working conditions and different modes of operation, the operation time of the compressor 21 is reduced, and the aim of low energy consumption is fulfilled.
It should be noted that the compressor 21 is connected in parallel with a first check valve 27, and the first check valve 27 is used for ensuring normal circulation of the cooling capacity when the compressor 21 is turned off; the liquid pump 24 is connected in parallel with a second one-way valve 29, the second one-way valve 29 being used to ensure the normal circulation of the cooling energy when the liquid pump 24 is switched off.
It should be further noted that a third check valve 26 is further connected in series at the outlet end of the compressor 21, and the third check valve 26 is used for preventing cold backflow when the compressor 21 operates; the outlet end of the liquid pump 24 is connected in series with a fourth check valve 28, and the fourth check valve 28 is used for preventing cold flow from flowing back when the liquid pump 24 operates.
Specifically, the end unit 10 may include a plurality of groups of cooling units arranged in parallel, each group of cooling units including an evaporator 11 and a water valve 12 connected in series. In this embodiment, each cooling unit includes an evaporator 11 and a water valve 12, and the end unit 10 may be provided with a plurality of cooling units in parallel as required. In addition, multiple sets of cold station units 20 may be arranged in parallel as desired.
The evaporator 11 may be one of a tube evaporator, a basket evaporator and a lingwen evaporator, and the compressor 21 may be one of a variable frequency rotor compressor, a variable frequency scroll compressor, a magnetic levitation compressor, a gas levitation compressor, a variable frequency centrifugal compressor and a variable frequency screw compressor. Of course, other types of evaporators 11 and compressors 21 may be selected as desired.
The mechanical refrigeration unit 70 further comprises an accumulator 23, the accumulator 23 being arranged between the first heat exchanger 22 and the liquid pump 24.
In one embodiment, the indirect evaporative cooling device 30 comprises a sprayer 34, a cooler 60, a water pump 32 and a water pan 36, wherein the water pan 36 is used for receiving cooling water sprayed from the sprayer 34 to the cooler 60, the sprayer 34 is communicated with the water pan 36 through the first heat exchanger 22, the water pump 32 is used for conveying the cooling water in the water pan 36 to the sprayer 34, and the cooling water conveyed from the water pan 36 to the sprayer 34 is subjected to heat exchange with chilled water flowing through the first heat exchanger 22 in the mechanical refrigerating device 70 when flowing through the first heat exchanger 22; the cooler 60 may be a filler, an indirect heat exchange core, or a combination of an indirect heat exchange core and a filler; the water pump 32 pumps the cooling water in the water receiving tray 36 to the sprayer 34, the cooling water exchanges heat with the refrigerant in the mechanical refrigeration device 70 when flowing through the first heat exchanger 22 in the process of conveying the cooling water to the sprayer 34, the temperature of the cooling water rises and the temperature of the refrigerant falls, the heated cooling water is conveyed to the sprayer 34 and sprayed to the cooler 60 to be cooled, and finally the cooling water is collected by the water receiving tray 36, and the circulation is performed, so that the refrigerant of the mechanical refrigeration device 50 is continuously cooled through the first heat exchanger 22.
Further, the indirect evaporative cooling system 30 further includes an outdoor fan 35 for driving air to flow through the cooler 60; the end unit 10 further comprises a power pump 13 and an indoor fan 14, the power pump 13 being arranged between the evaporator 11 and the second heat exchanger 40, the indoor fan 14 being arranged to drive air through the evaporator 11.
The indirect evaporative cooling device 30 further includes an outdoor fan 35 for driving air to flow through the cooler 60, and a housing for accommodating the outdoor fan 35, the sprayer 34, the cooler 60, the water pump 32, and the water pan 36, the housing is provided with a plurality of air inlets and air outlets, and external air enters the housing from the air inlets under the action of the outdoor fan 35, and then flows through the cooler 60 to exchange heat with cooling water to reduce the temperature of the cooling water.
Further, referring to fig. 1, the indirect evaporative cooling device 30 further includes a preheating heat exchanger 31 for heating the air flowing to the cooler 60, the preheating heat exchanger 31 being disposed in parallel between the shower 34 and the first heat exchanger 22; specifically, the preheating heat exchangers 31 may be multiple and connected in parallel, the preheating heat exchangers 31 are disposed at an air inlet of the housing, the first heat exchanger 22 includes a first heat exchange channel and a second heat exchange channel for heat exchange, an inlet end of the first heat exchange channel is connected to an outlet end of the compressor 21, an outlet end of the first heat exchange channel is connected to an inlet end of the reservoir 23, an inlet end of the second heat exchange channel is connected to an outlet end of the water pump 32, outlet ends of the second heat exchange channel are respectively connected to inlet ends of the preheating heat exchangers 31 and an inlet end of the shower 34, meanwhile, the outlet ends of the preheating heat exchangers 31 are further communicated with the shower 34, the shower 34 sprays cooling water flowing out of the preheating heat exchangers 31 to the cooler 60, the temperature of the cooling water in the preheating heat exchangers 31 which exchanges heat with air is reduced, and the cooling water flowing into the shower 33 from the heat exchangers 22 is mixed with the cooling water to reduce the temperature, the cooling effect is improved.
In this embodiment, consider in the northern area, the number of days that temperature is below 0 ℃ is more, probably lead to freezing the phenomenon of pipe, need artifical chisel ice sometimes, or open electric heating and heat the compensation, not only bring the energy consumption and increase like this, bring the unit risk simultaneously, constitute adverse effect to data center, for avoiding this phenomenon, set up in indirect evaporative cooling device 30's casing air intake department and be used for carrying out the preheat heat exchanger 31 of heat transfer with the air, preheat heat exchanger 31 and carry out heat exchange with the air that the air intake flows in, with the heated air, thereby the temperature in the elevator case, keep the temperature in the machine case more than 0 ℃, avoid the cooling water to freeze or freeze the pipe.
In another embodiment, referring to fig. 2, the indirect evaporative cooling device 30 further includes a pre-cooling heat exchanger 33 for cooling the air flowing to the cooler 60, an input end of the pre-cooling heat exchanger 33 is communicated with the water pan 36, and an output end of the pre-cooling heat exchanger 33 is communicated with the sprayer 34. Specifically, in this embodiment, the number of the pre-cooling heat exchangers 33 may be multiple and connected in parallel, the pre-cooling heat exchanger 33 is disposed at the air inlet of the housing, the input end of the water pump 32 is communicated with the water pan 36, and the output end of the water pump 32 is communicated with the input end of the pre-cooling heat exchanger 33 and the input end of the second heat exchange channel of the first heat exchanger 22, that is, the pre-cooling heat exchanger 33 is connected in parallel with the first heat exchanger 22.
In this embodiment, the number of days that the temperature is higher is considered in the southern area, and therefore, in order to improve the condensation effect of the cooler 60, the ambient temperature of the cold station unit 20 is prevented from being too high, a natural cold source is fully utilized, the precooling heat exchanger 33 for exchanging heat with air is arranged at the air inlet of the housing of the indirect evaporative cooling device 30, and the precooling heat exchanger 33 can exchange heat with air flowing in from the air inlet to cool the air and improve the condensation effect of the cooler 60.
In one embodiment, when a variable capacity centrifugal compressor is used, the mechanical refrigeration device 70 further comprises a bypass line 50 for cooling the motor of the compressor 21, one end of the bypass line 50 is connected to the input end of the compressor 21, and the end of the bypass line 50 remote from the compressor 21 is connected to the line between the liquid pump 24 and the evaporator 11; specifically, one end of the bypass line 50, which is far away from the compressor 21, is connected to a line between the liquid pump 24 and the expansion valve 25, and the other end of the bypass line 50 is connected to a motor cooling inlet of the compressor 21, so as to cool the motor of the compressor 21 through the bypass line 50, thereby achieving the purpose of protecting the compressor 21.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The cold water type cold station system provided by the present invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. A cold water type cold station system, characterized by comprising a terminal unit (10) and a cold station unit (20) for providing cold to the terminal unit (10);
the cold station unit (20) comprises a mechanical refrigerating device (70) and an indirect evaporative cooling device (30), the mechanical refrigerating device (70) comprises a compressor (21), a first heat exchanger (22), a liquid pump (24), an expansion valve (25) and a second heat exchanger (40) which are sequentially connected in series, the compressor (21) is connected with a first one-way valve (27) in parallel, the liquid pump (24) is connected with a second one-way valve (29) in parallel, and the indirect evaporative cooling device (30) is connected with the first heat exchanger (22) to realize heat exchange between the indirect evaporative cooling device (30) and the mechanical refrigerating device (70);
the end unit (10) comprises at least an evaporator (11), the evaporator (11) being connected to the second heat exchanger (40) for receiving the cold provided by the cold station unit (20).
2. A cold water type cold station system according to claim 1, wherein the outlet end of said compressor (21) is further connected in series with a third one-way valve (26), and the outlet end of said liquid pump (24) is connected in series with a fourth one-way valve (28).
3. A cold-water type cold station system according to claim 1, wherein the mechanical refrigeration device (70) further comprises an accumulator (23), said accumulator (23) being provided between said first heat exchanger (22) and said liquid pump (24).
4. A cold water type cold station system according to claim 1, comprising a shower (34), a cooler (60), a water pump (32) and a water pan (36), wherein the water pan (36) is adapted to receive cooling water sprayed by the shower (34) towards the cooler (60), the shower (34) is in communication with the water pan (36) through the first heat exchanger (22), and the water pump (32) is adapted to deliver cooling water in the water pan (36) to the shower (34), wherein the cooling water delivered from the water pan (36) to the shower (34) is in heat exchange with chilled water in the mechanical refrigeration device (70) flowing through the first heat exchanger (22) when flowing through the first heat exchanger (22).
5. A cold water type cold station system according to claim 4, further comprising a preheat heat exchanger (31) for heating air flowing to the cooler (60), the preheat heat exchanger (31) being arranged in parallel between the shower (34) and the first heat exchanger (22).
6. A cold water type cold station system according to claim 4, further comprising a pre-cooling heat exchanger (33) for cooling air flowing to the cooler (60), an input end of the pre-cooling heat exchanger (33) being in communication with the water-tray (36), an output end of the pre-cooling heat exchanger (33) being in communication with the shower (34).
7. A cold water type cold station system according to claim 4, wherein said indirect evaporative cooling system (30) further comprises an outdoor fan (35) for driving air through said chiller (60).
8. A cold water type cold station system according to claim 1, wherein the terminal unit (10) further comprises a power pump (13) and an indoor fan (14), the power pump (13) being provided between the evaporator (11) and the second heat exchanger (40), the indoor fan (14) being for driving air flow through the evaporator (11).
9. A cold water type cold station system according to claim 1, wherein said evaporators (11) have more than two and are arranged in parallel, each evaporator (11) having an input provided with a water valve (12).
10. A cold water type cold station system according to claim 1, wherein the compressor (21) is a variable capacity centrifugal compressor, the input of the compressor (21) is further connected with a bypass line (50), and the end of the bypass line (50) remote from the compressor (21) is connected to a line between the liquid pump (24) and the expansion valve (25).
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| CN202121290489.2U CN215529686U (en) | 2021-06-09 | 2021-06-09 | A cold water cooling station system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115200269A (en) * | 2022-07-20 | 2022-10-18 | 合肥美的暖通设备有限公司 | Refrigerating system, cooling unit and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115200269A (en) * | 2022-07-20 | 2022-10-18 | 合肥美的暖通设备有限公司 | Refrigerating system, cooling unit and control method thereof |
| CN115200269B (en) * | 2022-07-20 | 2024-03-22 | 合肥美的暖通设备有限公司 | Refrigerating system, cooling unit and control method of cooling unit |
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