CN212274164U

CN212274164U - Indirect evaporative cooling refrigerating unit and heat dissipation unit for data center machine room

Info

Publication number: CN212274164U
Application number: CN202020987539.1U
Authority: CN
Inventors: 李智; 丁江波; 黄伟涛
Original assignee: Shenzhen Hengke Technology Co ltd
Current assignee: Shenzhen Hengke Technology Co ltd
Priority date: 2020-06-02
Filing date: 2020-06-02
Publication date: 2021-01-01
Anticipated expiration: 2030-06-02

Abstract

The application discloses a heat dissipation unit for data center computer lab should be used for heat dissipation unit of data center computer lab includes: an evaporative cooling type water chilling unit and an indirect evaporative cooling refrigeration unit; the indirect evaporative cooling refrigerating unit comprises a refrigerating module and a heat exchange module, wherein the heat exchange module comprises a heat exchange box, a primary surface cooler, a secondary surface cooler and an air supply mechanism for supplying air to a machine room, wherein the primary surface cooler and the secondary surface cooler are arranged in the heat exchange box; the evaporative cooling type water chilling unit comprises a cooling system and an evaporator, wherein the inlet end and the outlet end of the evaporator are respectively communicated with the outlet end and the inlet end of the secondary surface air cooler. The problem of among the correlation technique data center's computer lab refrigeration heat dissipation have unable make full use of natural cooling resource, the energy consumption is high is solved in this application.

Description

Indirect evaporative cooling refrigerating unit and heat dissipation unit for data center machine room

Technical Field

The application relates to the field of machine room refrigeration and heat dissipation, in particular to an indirect evaporative cooling refrigerating unit and a heat dissipation unit for a data center machine room.

Background

At present, the construction of large data centers in China presents a rapidly developing posture, and the large data centers have quite huge energy consumption and high requirements on heat dissipation. However, in some areas where power resources are scarce, the power resources are very precious, and the precious power resources cannot be used in the aspect of heat dissipation of the machine room.

The indirect evaporative cooling equipment is adopted to refrigerate and dissipate heat in part of areas, the indirect evaporative cooling technology can acquire cold energy from the natural environment, because the indirect evaporative cooling is to refrigerate through the evaporation and heat absorption of water, only when the used air has the condition of larger temperature difference of dry and wet balls, good refrigerating effect can be achieved, when the temperature of the environment wet balls is higher, the refrigerating effect of the indirect evaporative cooling equipment is poorer, mechanical refrigerating equipment is adopted to refrigerate and dissipate heat in part of areas, although the mechanical refrigerating equipment can provide more stable heat dissipation effect, the energy consumption is higher, and natural resources cannot be fully utilized.

Aiming at the problems that natural cooling resources cannot be fully utilized and energy consumption is high in refrigeration and heat dissipation of a machine room of a data center in the related art, an effective solution is not provided at present.

SUMMERY OF THE UTILITY MODEL

The main aim at of this application provides an indirect evaporative cooling refrigerating unit and is used for heat dissipation unit of data center computer lab to solve among the relevant art computer lab refrigeration heat dissipation of data center and have unable make full use of natural cooling resource, the energy consumption is high.

In order to achieve the above object, the present application provides an indirect evaporative cooling refrigerator unit, comprising: the system comprises an evaporation module, a spraying system, a water tank, a heat exchange module, a primary pipeline and a secondary pipeline; the heat exchange module comprises a heat exchange box, a primary surface cooler, a secondary surface cooler and an air supply mechanism, wherein the primary surface cooler is arranged in the heat exchange box, and the secondary surface cooler and the air supply mechanism are communicated with an evaporator of the mechanical refrigerating unit; the spraying system is arranged above the evaporation module; the water tank is communicated with the lower end of the evaporation module, the inlet end of the primary surface cooler is communicated with the water tank through a primary pipeline, and the outlet end of the primary surface cooler is communicated with the spraying system through a secondary pipeline.

Furthermore, the first-stage surface cooler, the second-stage surface cooler and the air supply mechanism are sequentially arranged along the air supply direction of the machine room.

Furthermore, the inlet end and the outlet end of the second-stage surface cooler are respectively communicated with a third-stage pipeline and a fourth-stage pipeline, and the third-stage pipeline and the fourth-stage pipeline extend out of the heat exchange box and are respectively used for being connected with the outlet end and the inlet end of an evaporator of the mechanical refrigerating unit.

According to another aspect of the present application, there is provided a heat dissipation unit for a data center room, including: an evaporative cooling type water chilling unit and an indirect evaporative cooling refrigeration unit; the indirect evaporative cooling refrigerating unit comprises a refrigerating module and a heat exchange module, wherein the heat exchange module comprises a heat exchange box, a primary surface cooler, a secondary surface cooler and an air supply mechanism for supplying air to a machine room, wherein the primary surface cooler and the secondary surface cooler are arranged in the heat exchange box; the evaporative cooling type water chilling unit comprises a cooling system and an evaporator, wherein the inlet end and the outlet end of the evaporator are respectively communicated with the outlet end and the inlet end of the secondary surface air cooler.

Further, the method also comprises the following steps: the temperature monitoring module is used for monitoring the environment wet bulb temperature and/or the air supply temperature of the machine room; and the control module is used for receiving the signal fed back by the temperature monitoring module and controlling the indirect evaporative cooling refrigerating unit and/or the evaporative cooling water chilling unit to be started.

Furthermore, the control module is used for receiving a signal fed back by the temperature monitoring module and controlling the indirect evaporative cooling refrigerating unit to be independently started or the indirect evaporative cooling refrigerating unit and the evaporative cooling type water chilling unit to be started together.

Furthermore, the refrigeration module comprises an evaporation module, a spraying system, a water tank, a primary pipeline and a secondary pipeline; the spraying system is arranged above the evaporation module; the water tank is communicated with the lower end of the evaporation module, the inlet end of the primary surface cooler is communicated with the water tank through a primary pipeline, and the outlet end of the primary surface cooler is communicated with the spraying system through a secondary pipeline.

Further, the primary surface air cooler and the secondary surface air cooler both adopt coil pipes.

According to another aspect of the application, a heat dissipation method applied to a heat dissipation unit for a data center machine room is provided, wherein the outdoor inlet air wet bulb temperature is set to T1, and the specific manner is as follows: when T1 is less than 19 ℃, the indirect evaporative cooling refrigerating unit is in an open state, the evaporative cooling water chilling unit is in a closed state, cooling water is cooled to a wet bulb temperature close to air by air through a refrigeration module of the indirect evaporative cooling refrigerating unit, low-temperature cooling water is sent to a primary surface air cooler in the heat exchange box to be cooled and enters machine room return air in the heat exchange box, the cooled return air is sent to the machine room by the air supply mechanism, and the cooling water returns to the refrigeration module after being subjected to heat exchange by the primary surface air cooler so as to circulate;

when T1 is more than or equal to 19 ℃, the indirect evaporative cooling refrigerating unit and the evaporative cooling water chilling unit are both in an open state, cooling water is cooled to a wet bulb temperature close to air by air through a refrigerating module of the indirect evaporative cooling refrigerating unit, low-temperature cooling water is sent to a first-stage surface air cooler in the heat exchange box to be cooled and enters machine room return air in the heat exchange box, meanwhile, a cooling system and an evaporator of the evaporative cooling water chilling unit send cooling media to a second-stage surface air cooler to be cooled and enter the machine room return air in the heat exchange box, and the cooled return air is sent to the machine room by the air supply mechanism.

According to another aspect of the present application, a heat dissipation method applied to a heat dissipation unit for a data center room is provided, where an air supply temperature of the room is set to T2, specifically as follows:

when T2 is less than or equal to 26 ℃, the indirect evaporative cooling refrigerating unit is in an open state, the evaporative cooling water chilling unit is in a closed state, cooling water is cooled to a wet bulb temperature close to air by air through a refrigeration module of the indirect evaporative cooling refrigerating unit, low-temperature cooling water is sent to a primary surface cooler in a heat exchange box to be cooled and enters machine room return air in the heat exchange box, the cooled return air is sent to the machine room by an air supply mechanism, and the cooling water returns to the refrigeration module after being subjected to heat exchange by the primary surface cooler so as to circulate;

when T2 is more than 26 ℃, the indirect evaporative cooling refrigerating unit and the evaporative cooling water chilling unit are both in an open state, cooling water is cooled to a wet bulb temperature close to air by air through a refrigerating module of the indirect evaporative cooling refrigerating unit, low-temperature cooling water is sent to a first-level surface cooler in the heat exchange box to be cooled and enters machine room return air in the heat exchange box, meanwhile, a cooling system and an evaporator of the evaporative cooling water chilling unit send cooling media to a second-level surface cooler to be cooled and enter the machine room return air in the heat exchange box, and the cooled return air is sent to the machine room by the air supply mechanism.

In the embodiment of the application, adopt the mode of addding the second grade surface cooler, through setting up evaporation module, a spraying system, the water tank, heat transfer module, one-level pipeline and second grade pipeline, and heat transfer module includes the heat transfer case and installs the one-level surface cooler in the heat transfer case, air supply mechanism and be used for the second grade surface cooler with the evaporimeter intercommunication of mechanical refrigeration unit, evaporation module top is located to spraying system, the water tank communicates with one-level surface cooler, the purpose of accessible second grade surface cooler connection mechanical refrigeration unit has been reached, thereby realized can be with the refrigerated technological effect of indirect evaporative cooling equipment and mechanical refrigeration equipment cooperation, and then solved the unable and effectual cooperation refrigeration of indirect evaporative cooling equipment among the relevant technology, lead to the great problem of refrigeration limitation.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it. In the drawings:

FIG. 1 is a schematic structural diagram according to an embodiment of the present application;

FIG. 2 is a schematic diagram of an indirect evaporative cooling refrigeration unit according to an embodiment of the present application;

the system comprises a spraying system 1, an evaporation module 2, a water tank 3, a secondary pipeline 4, a primary surface cooler 5, a heat exchange box 6, a secondary surface cooler 7, an air supply mechanism 8, an indirect evaporative cooling refrigerating unit 9, a primary pipeline 10, a four-stage pipeline 11, a three-stage pipeline 12, an evaporator 13, an evaporative cooling type water chilling unit 14, a compressor 15 and a cooling system 16.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all 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 application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used.

In this application, the terms "upper", "lower", "inside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "disposed," "provided," "connected," "secured," and the like are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In addition, the term "plurality" shall mean two as well as more than two.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1 to 2, an embodiment of the present application provides an indirect evaporative cooling refrigeration unit, including: the system comprises an evaporation module 2, a spraying system 1, a water tank 3, a heat exchange module, a primary pipeline 10 and a secondary pipeline 4; the heat exchange module comprises a heat exchange box 6, a primary surface cooler 5 arranged in the heat exchange box 6, a secondary surface cooler 7 communicated with an evaporator 13 of the mechanical refrigerating unit and an air supply mechanism 8; the spraying system 1 is arranged above the evaporation module 2; the water tank 3 is communicated with the lower end of the evaporation module 2, the inlet end of the primary surface cooler 5 is communicated with the water tank 3 through a primary pipeline 10, and the outlet end of the primary surface cooler is communicated with the spraying system 1 through a secondary pipeline 4.

In the embodiment, when the ambient wet bulb temperature meets the refrigeration requirement, cooling water in the water tank 3 is conveyed to the primary surface air cooler 5 in the heat exchange box 6 through the primary pipeline 10 to cool air entering the machine room return air of the heat exchange box 6, the cooled return air is conveyed to the machine room through the air supply mechanism 8, the cooling water is conveyed to the spraying system 1 through the secondary pipeline 4 after being subjected to heat exchange through the primary surface air cooler 5, the spraying system 1 sprays the cooling water carrying heat to the evaporation module 2, the cooling water is cooled to the wet bulb temperature close to the air on the evaporation module 2 and is stored in the water tank 3, and the refrigeration process depending on the ambient wet bulb temperature is circularly completed; when the environment wet bulb temperature is higher, the outlet end and the inlet end of an evaporator 13 of a mechanical refrigerating unit (such as an evaporative cooling type water chilling unit 14) can be respectively connected to the inlet end and the outlet end of a second-stage surface cooler 7, at the moment, the first-stage surface cooler 5 continuously works and cools machine room return air once, a cooling medium is conveyed to the second-stage surface cooler 7 by the mechanical refrigerating unit, the machine room return air in a heat exchange box 6 is cooled secondarily, the machine room return air is effectively cooled under the combined action of the first-stage surface cooler 5 and the second-stage surface cooler 7, natural resources can be fully utilized, namely, the environment wet bulb temperature cools the machine room return air, the energy consumption is effectively reduced, the mechanical refrigerating unit and indirect evaporative cooling equipment can be combined for refrigeration through the second-stage surface cooler 7 in the heat exchange box 6, and the refrigeration efficiency is improved.

As shown in fig. 1 to 2, the primary surface cooler 5, the secondary surface cooler 7 and the air supply mechanism 8 are sequentially arranged along the air supply direction of the machine room, i.e. the secondary surface cooler 7 is arranged between the primary surface cooler 5 and the air supply mechanism 8, when the temperature of the environment wet bulb does not meet the cooling requirement, the machine room return air is firstly cooled by the primary surface cooler 5 with the temperature close to the temperature of the environment wet bulb, and then is secondarily cooled by the secondary surface cooler 7 with the lower temperature, the machine room return air subjected to the secondary cooling meets the air supply temperature of the machine room, the air supply mechanism 8 supplies cold air into the machine room, the air supply mechanism 8 can adopt an air supply fan arranged in a heat exchange box 6, in order to facilitate the air flow, the heat exchange box 6 is provided with an air inlet of the machine room return air and an air outlet for supplying air to the machine room, the primary surface cooler 5 and the air supply mechanism 8 respectively correspond, the secondary surface cooler 7 can carry out secondary cooling on the machine room return air.

As shown in fig. 1 to 2, the inlet end and the outlet end of the second-stage surface cooler 7 are respectively communicated with a third-stage pipeline 12 and a fourth-stage pipeline 11, the third-stage pipeline 12 and the fourth-stage pipeline 11 both extend out of the heat exchange box 6 and are respectively used for being connected with the outlet end and the inlet end of an evaporator 13 of a mechanical refrigerating unit, in order to connect the second-stage surface cooler 7 and the mechanical refrigerating unit, the inlet end and the outlet end of the second-stage surface cooler 7 are respectively communicated with a third-stage pipeline 12 and a fourth-stage pipeline 11, in order to avoid leakage of cold air, the connection between the third-stage pipeline 12 and the fourth-stage pipeline 11 and the heat exchange box 6 is sealed, the sealing mode can be glue injection.

As shown in fig. 1 to 2, a first temperature sensor for monitoring the air supply temperature of the machine room is arranged in the heat exchange box 6, the first temperature sensor is located on the side wall of the heat exchange box 6 and is arranged close to the air outlet, the air supply temperature of the machine room is a set value, which can be 25 ± 1 ℃, the first temperature sensor is used for monitoring whether the air supply temperature of the machine room is higher than the set value, when the air supply temperature is higher than the set value, a signal is output, and the mechanical refrigerating unit is started, the first-stage surface cooler 5 and the second-stage surface cooler 7 jointly refrigerate, the first-stage surface cooler 5 and the second-stage surface cooler 7 both adopt coil pipes, the refrigerating effect is good, the efficiency is high, the mechanical refrigerating unit further comprises a second temperature sensor for monitoring the environment wet bulb temperature, the second temperature sensor is used for judging whether the environment.

As shown in fig. 1 to 2, according to another aspect of the present application, there is provided a heat sink assembly for a data center room, including: an evaporative cooling type water chilling unit 14 and an indirect evaporative cooling refrigeration unit 9; the indirect evaporative cooling refrigerating unit 9 comprises a refrigerating module and a heat exchange module, wherein the heat exchange module comprises a heat exchange box 6, a primary surface cooler 5 and a secondary surface cooler 7 which are arranged in the heat exchange box 6, and an air supply mechanism 8 for supplying air to a machine room; the evaporative cooling type water chilling unit 14 comprises a cooling system 16 and an evaporator 13, and the inlet end and the outlet end of the evaporator 13 are respectively communicated with the outlet end and the inlet end of the secondary surface air cooler 7.

In the embodiment, an evaporative cooling type water chilling unit 14 and an indirect evaporative cooling type refrigerating unit 9 are combined to be used as a refrigerating and heat dissipating unit of a data center machine room, a secondary surface cooler 7 is installed in a heat exchange box 6 of the indirect evaporative cooling type refrigerating unit 9, the outlet end and the inlet end of the secondary surface cooler 7 are respectively communicated with the inlet end and the outlet end of an evaporator 13 of the evaporative cooling type water chilling unit 14, when the temperature of an environmental wet bulb meets the cooling requirement, the indirect evaporative cooling type refrigerating unit 9 works independently, cooling water in a water tank 3 is conveyed to a primary surface cooler 5 in the heat exchange box 6 through a primary pipeline 10 to be cooled to enter machine room return air of the heat exchange box 6, the cooled return air is conveyed to the machine room through an air supply mechanism 8, the cooling water is conveyed to a spraying system 1 through a secondary pipeline 4 after heat exchange through the primary surface cooler 5, the spraying system 1 sprays the cooling water carrying heat to an evaporation, the cooling water is cooled to the temperature close to the wet bulb temperature of the air on the evaporation module 2 and is stored in the water tank 3, so that the process of refrigerating depending on the ambient wet bulb temperature is circularly completed;

when the temperature of the environmental wet bulb is high, the evaporative cooling type water chilling unit 14 and the indirect evaporative cooling refrigeration unit 9 work together, when the primary surface air cooler 5 cools the machine room return air, the evaporative cooling type water chilling unit 14 cools the cooling medium by using the components such as the compressor 15, the evaporator 13 and the like and conveys the cooling medium to the secondary surface air cooler 7, the machine room return air in the heat exchange box 6 is cooled secondarily, the machine room return air is effectively refrigerated under the combined action of the primary surface air cooler 5 and the secondary surface air cooler 7, natural resources can be fully utilized, namely the temperature of the environmental wet bulb is used for refrigerating the machine room return air, the energy consumption is effectively reduced, the mechanical refrigeration unit and the indirect evaporative cooling equipment can be combined for refrigerating through the secondary surface air cooler 7 in the heat exchange box 6, the refrigerating efficiency is improved, the cooling medium can be cooling water, and the evaporative cooling type water chilling unit 14 and the indirect evaporative cooling refrigeration unit 9 can be separately and independently installed, only need with second grade surface cooler 7 and evaporimeter 13 connect can, can carry out the installation of equipment in more installation environment, simplified refrigerating unit's structure, reduced and maintained the degree of difficulty and maintenance cost to form independent space separately with outside wind system and computer lab air treatment system, avoid outside wind, outside evaporating water can be through heat transfer core seepage to computer lab air treatment system, influence computer lab cleanliness factor and humidity.

As shown in fig. 1 to 2, the method further includes: the temperature monitoring module is used for monitoring the environment wet bulb temperature and/or the air supply temperature of the machine room; and the control module is used for receiving the signal fed back by the temperature monitoring module and controlling the indirect evaporative cooling refrigerating unit 9 and/or the evaporative cooling type water chilling unit 14 to be started.

Specifically, the temperature monitoring module can monitor the environment wet bulb temperature and the air supply temperature of the machine room, or can only monitor the environment wet bulb temperature alone, whether the air supply temperature of the machine room meets the requirement can be obtained through any one of the two monitoring results, when the environment wet bulb temperature or the air supply temperature of the machine room is higher than a set threshold value, that is, the indirect evaporative cooling refrigeration unit 9 can not meet the refrigeration and heat dissipation requirements, at this time, the evaporative cooling type water chilling unit 14 needs to be started for mechanical refrigeration, when the environmental wet bulb temperature meets the refrigeration requirements again, the evaporative cooling chiller unit 14 can be shut down, the control module is used for receiving the signal fed back by the temperature monitoring module, the control module compares the signal input by the temperature monitoring module with a set threshold value, and controls the indirect evaporative cooling refrigerating unit 9 to be opened independently or the indirect evaporative cooling refrigerating unit 9 and the evaporative cooling type water chilling unit 14 to be opened together.

As shown in fig. 1 to 2, the primary surface cooler 5, the secondary surface cooler 7, and the air supply mechanism 8 are sequentially arranged along the air supply direction of the machine room.

Specifically, it should be noted that, namely, the secondary surface cooler 7 is located between the primary surface cooler 5 and the air supply mechanism 8, when the temperature of the environment wet bulb does not meet the cooling requirement, the machine room return air is firstly cooled once by the primary surface cooler 5 whose temperature is close to the temperature of the environment wet bulb, and then cooled secondarily by the secondary surface cooler 7 whose temperature is lower, the machine room return air cooled secondarily meets the temperature of the machine room air supply, the air supply mechanism 8 then supplies cold air to the machine room, where the air supply mechanism 8 can adopt an air supply fan installed in the heat exchange box 6, in order to facilitate the air flow, the heat exchange box 6 is provided with an air inlet for the machine room return air and an air outlet for the machine room air supply, the primary surface cooler 5 and the air supply mechanism 8 respectively correspond to the air inlet and the air outlet, so that the primary surface cooler 5 can cool the machine room return air once, and the, the primary surface air cooler 5 and the secondary surface air cooler 7 both adopt coil pipes.

As shown in fig. 1 to 2, the refrigeration module includes an evaporation module 2, a spraying system 1, a water tank 3, a primary pipeline 10 and a secondary pipeline 4; wherein, the spraying system 1 is arranged above the evaporation module 2; the water tank 3 is communicated with the lower end of the evaporation module 2, the inlet end of the primary surface cooler 5 is communicated with the water tank 3 through a primary pipeline 10, and the outlet end of the primary surface cooler is communicated with the spraying system 1 through a secondary pipeline 4.

In this embodiment, still can set up the first collar and the second collar that are used for installing one-level surface cooler 5 and second grade surface cooler 7 respectively on the bottom plate of heat transfer case 6, be convenient for to the preliminary location of one-level surface cooler 5 and second grade surface cooler 7 in the installation, can set up a plurality of bearing blocks along its circumference in first collar and the second collar, on corresponding bearing block was all arranged in to one-level surface cooler 5 and second grade surface cooler 7, the area of contact of multiplicable one-level surface cooler 5 and second grade surface cooler 7 and air, the heat transfer of being convenient for.

As shown in fig. 1 to 2, according to another aspect of the present application, a heat dissipation method applied to a heat dissipation unit for a data center room is provided, where the outdoor inlet air wet bulb temperature is set to T1, specifically as follows: when T1 is less than 19 ℃, the indirect evaporative cooling refrigerating unit 9 is in an open state, the evaporative cooling water chilling unit 14 is in a closed state, cooling water is cooled to a temperature close to the wet bulb temperature of air by air through a refrigerating module of the indirect evaporative cooling refrigerating unit 9, low-temperature cooling water is sent to the primary surface air cooler 5 in the heat exchange box 6 to be cooled and enters machine room return air in the heat exchange box 6, the cooled return air is sent to the machine room by the air supply mechanism 8, and the cooling water returns to the refrigerating module after heat exchange through the primary surface air cooler 5 so as to circulate;

when the temperature T1 is more than or equal to 19 ℃, the indirect evaporative cooling refrigerating unit 9 and the evaporative cooling water chilling unit 14 are both in an open state, cooling water is cooled to the temperature close to the wet bulb temperature of air by air through a refrigerating module of the indirect evaporative cooling refrigerating unit 9, low-temperature cooling water is sent to the primary surface air cooler 5 in the heat exchange box 6 to be cooled into machine room return air in the heat exchange box 6, meanwhile, a cooling system 16 and an evaporator 13 of the evaporative cooling water chilling unit 14 send cooling media to the secondary surface air cooler 7 to be cooled into the machine room return air in the heat exchange box 6, and the cooled return air is sent to a machine room by the air supply mechanism 8.

In this embodiment, compared with the common frequency conversion centrifugal chiller and the end precision air conditioner, the evaporative cooling chiller 14 has a significant energy saving effect in the aspect of the main machine, and the selected high-efficiency evaporative cooling chiller 14: the COP value under the design working condition reaches 8.2, the COP value under the full load is 8.2, and compared with a 1-level energy efficiency frequency conversion centrifugal water chilling unit (the COP value under the full load is 6.30), the energy efficiency is improved by about 15%. The indirect evaporation refrigerating unit is adopted at the tail end, so that the starting time of the main machine can be shortened, a natural cold source can be adopted when the wet bulb temperature is less than or equal to 19 ℃, the utilization time of the natural cold source is prolonged, the running time of the energy-consumption refrigerating main machine is shortened by 1881 hour, in addition, the indirect evaporation refrigerating unit can use the natural cold source all the year round, the evaporation cooling type water chilling unit 14 can be used as auxiliary (supplement) cooling, the 1450 percent load of the evaporation cooling type water chilling unit can be reduced, and the energy can be saved by 50 percent compared with the conventional frequency conversion centrifugal water chilling unit, plate replacement and tail end precision air.

In the embodiment, the air supply temperature of the machine room can be set to be T2, and two conditions are included when the temperature is more than or equal to 19 ℃ at T1, when T2 is more than T1 and more than or equal to 19 ℃ and T1 is more than or equal to T2, the refrigeration heat dissipation modes in the two cases are the same as those in the case of T1 and more than or equal to 19 ℃, and the difference is that the energy consumption of the evaporative cooling type water chilling unit 14 with the temperature of T2 more than T1 and more than or equal to 19 ℃ is lower than that in the other case, so that the whole unit can be set into three modes, under different temperature conditions, different refrigeration and heat dissipation modes are selected, so that the unit always operates in the most efficient energy-saving mode, the start-stop control of the indirect evaporative cooling refrigeration unit 9 and the evaporative cooling type water chilling unit 14 can be controlled in a unified way through the control module, the intellectualization of the heat dissipation unit is improved, when the ambient wet bulb temperature is higher than 19 ℃, the refrigerating capacity of the indirect evaporative cooling refrigerating unit 9 is gradually reduced, and the refrigerating capacity of the evaporative cooling type water chilling unit 14 is gradually increased until the refrigerating capacities respectively account for 50 percent.

As shown in fig. 1 to fig. 2, according to another aspect of the present application, a heat dissipation method applied to a heat dissipation unit for a data center room is provided, where a room air supply temperature is set to T2, specifically as follows:

when T2 is less than or equal to 26 ℃, the indirect evaporative cooling refrigerating unit 9 is in an open state, the evaporative cooling water chilling unit 14 is in a closed state, cooling water is cooled to a temperature close to the wet bulb temperature of air by air through a refrigerating module of the indirect evaporative cooling refrigerating unit 9, low-temperature cooling water is sent to a primary surface air cooler 5 in a heat exchange box 6 to be cooled and enters machine room return air in the heat exchange box 6, the cooled return air is sent to the machine room by an air supply mechanism 8, and cooling water returns to the refrigerating module after heat exchange through the primary surface air cooler 5 so as to circulate;

when T2 is higher than 26 ℃, the indirect evaporative cooling refrigerating unit 9 and the evaporative cooling water chilling unit 14 are both in an open state, cooling water is cooled to a wet bulb temperature close to air by air through a refrigerating module of the indirect evaporative cooling refrigerating unit 9, low-temperature cooling water is sent to the primary surface air cooler 5 in the heat exchange box 6 to be cooled and enters machine room return air in the heat exchange box 6, meanwhile, a cooling system 16 and an evaporator 13 of the evaporative cooling water chilling unit 14 send cooling media to the secondary surface air cooler 7 to be cooled and enter the machine room return air in the heat exchange box 6, and the cooled return air is sent to a machine room by the air supply mechanism 8.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An indirect evaporative cooling refrigeration unit comprising:

the system comprises an evaporation module, a spraying system, a water tank, a heat exchange module, a primary pipeline and a secondary pipeline; wherein the content of the first and second substances,

the heat exchange module comprises a heat exchange box, a primary surface cooler arranged in the heat exchange box, a secondary surface cooler used for being communicated with an evaporator of the mechanical refrigerating unit and an air supply mechanism;

the spraying system is arranged above the evaporation module;

the water tank is communicated with the lower end of the evaporation module, the inlet end of the primary surface cooler is communicated with the water tank through a primary pipeline, and the outlet end of the primary surface cooler is communicated with the spraying system through a secondary pipeline.

2. The indirect evaporative cooling refrigeration unit of claim 1, wherein the primary surface cooler, the secondary surface cooler and the air supply mechanism are arranged in sequence along the air supply direction of the machine room.

3. The indirect evaporative cooling refrigeration unit of claim 1, wherein the inlet and outlet ends of the secondary surface cooler are respectively connected to a tertiary pipeline and a quaternary pipeline, and the tertiary pipeline and the quaternary pipeline extend out of the heat exchange box and are respectively used for connecting with the outlet end and the inlet end of the evaporator of the mechanical refrigeration unit.

4. A heat dissipation unit for a data center room, comprising:

an evaporative cooling type water chilling unit and an indirect evaporative cooling refrigeration unit; wherein the content of the first and second substances,

the indirect evaporative cooling refrigerating unit comprises a refrigerating module and a heat exchange module, wherein the heat exchange module comprises a heat exchange box, a primary surface cooler, a secondary surface cooler and an air supply mechanism for supplying air to the machine room, wherein the primary surface cooler and the secondary surface cooler are arranged in the heat exchange box;

the evaporative cooling type water chilling unit comprises a cooling system and an evaporator, wherein the inlet end and the outlet end of the evaporator are respectively communicated with the outlet end and the inlet end of the secondary surface air cooler.

5. The heat sink unit for the data center room of claim 4, further comprising:

the temperature monitoring module is used for monitoring the environment wet bulb temperature and/or the air supply temperature of the machine room;

and the control module is used for receiving the signal fed back by the temperature monitoring module and controlling the indirect evaporative cooling refrigerating unit and/or the evaporative cooling water chilling unit to be started.

6. The heat dissipation unit for the data center machine room as claimed in claim 5, wherein the control module is configured to receive a signal fed back by the temperature monitoring module and control the indirect evaporative cooling chiller unit to be turned on individually or the indirect evaporative cooling chiller unit and the evaporative cooling chiller unit to be turned on together.

7. The heat dissipation unit for the data center machine room as claimed in claim 4, wherein the primary surface cooler, the secondary surface cooler and the air supply mechanism are arranged in sequence along an air supply direction of the machine room.

8. The heat dissipation unit for the data center machine room according to claim 4, wherein the refrigeration module comprises an evaporation module, a spraying system, a water tank, a primary pipeline and a secondary pipeline; wherein the content of the first and second substances,

the spraying system is arranged above the evaporation module;

9. The cooling unit for the data center machine room according to any one of claims 4 to 8, wherein the primary surface cooler and the secondary surface cooler are both coil pipes.