CN115297692A

CN115297692A - Mixed liquid cooling system for front-end computer room and control method

Info

Publication number: CN115297692A
Application number: CN202211022822.0A
Authority: CN
Inventors: 郑亮; 郑洪斌; 郑洪军
Original assignee: Guangzhou Zhiguang Information Technology Co ltd
Current assignee: Guangzhou Zhiguang Information Technology Co ltd
Priority date: 2022-08-24
Filing date: 2022-08-24
Publication date: 2022-11-04

Abstract

The invention relates to the technical field of heat dissipation, and discloses a mixed liquid cooling system and a control method for a front-end computer room, which comprise a liquid cooling cabinet, a liquid cooling exchange distribution unit and an outdoor dry-type heat dissipation unit which are sequentially connected; the liquid cooling type cabinet comprises a plurality of liquid cooling units; the liquid cooling exchange distribution unit comprises a pressure expansion tank, a plate heat exchanger and a high-speed circulating shield pump which are connected in sequence; the outdoor dry type heat dissipation unit comprises a dry type warm cooling unit and an air-cooled warm water unit which are connected with each other. The invention can be compatible with the size of the existing common equipment, is convenient to install, apply and maintain, improves the energy utilization efficiency, saves energy, reduces emission, does not waste resources, reduces the operation cost of a machine room, is not influenced by the environment, and improves the safety and the stability of the operation of the machine room.

Description

Mixed liquid cooling system for front-end computer room and control method

Technical Field

The invention relates to the technical field of heat dissipation, in particular to a mixed liquid cooling system for a front-end computer room and a control method.

Background

With the development of informatization, the energy consumption problem is more and more considered for the layout planning of the base station and the data center, the energy consumption requirement index of the data center is formulated, and certain limitation is brought to the machine room with the energy efficiency index PUE which does not reach the standard. For a front-end machine room in a subtropical area, high-temperature damp heat is a natural condition, heat dissipation of equipment of the machine room is not facilitated, pervaporation cooling is adopted, a natural freezing time window can be utilized for a limited time, and therefore more pressure for energy conservation and environmental protection is met.

At present, the traditional front-end machine room generally adopts an air-cooled cooling mode to reduce the energy consumption, but the mode cannot meet the energy consumption requirement of the machine room with increasing business, and although certain technical improvement is made on the air-cooled cooling technology, the effect is slight, and the set PUE target cannot be achieved.

Disclosure of Invention

In order to solve the technical problems, the invention provides a mixed liquid cooling system for a front-end machine room and a control method, which can solve the problem that the existing machine room is not beneficial to cooling in a high-temperature damp and hot environment, are suitable for various existing standard equipment, have good cooling and heat dissipation functions, are simple to operate and convenient to maintain, are silent and capable of reducing noise and achieving the effects of energy conservation and emission reduction.

In a first aspect, the present invention provides a hybrid liquid cooling system for a front end machine room, the system comprising:

the liquid cooling cabinet, the liquid cooling exchange distribution unit and the outdoor dry type heat dissipation unit are connected in sequence;

the liquid cooling type cabinet comprises a plurality of liquid cooling units;

the liquid cooling exchange distribution unit comprises a pressure expansion tank, a plate heat exchanger and a high-speed circulation shield pump which are sequentially connected;

the outdoor dry type heat dissipation unit comprises a dry type warm cooling unit and an air-cooled warm water unit which are connected with each other.

Further, the liquid cooling unit includes:

the electronic fluorination device comprises a shell, wherein electronic fluorination liquid is filled in the shell, a glass panel is arranged on the front surface of the shell, an LED lamp bar is arranged on the upper side of the glass panel, and equipment labels, temperature display, current energy consumption display, a control switch and a network interface are arranged on two sides of the glass panel;

a fluoridizing liquid inlet and outlet is formed in the lower side of the front face of the shell, and guide rails are arranged on two sides of the bottom of the shell;

the back of the shell is provided with an interface label, an equipment socket and a power socket;

the top and two sides of the shell are respectively provided with a heat dissipation coil pipe, and the heat dissipation coil pipe is provided with a warm liquid outlet and a cold liquid inlet;

the liquid cooling unit is installed in the liquid cooling cabinet in a hoisting or guide rail telescopic installation mode.

Further, the liquid-cooled exchange distribution unit includes:

the heat exchanger comprises an exchange distribution cabinet and the plate heat exchanger arranged in the exchange distribution cabinet; the high-speed circulating shielding pump is arranged below the plate heat exchanger, the pressure expansion tank is arranged above the plate heat exchanger, the liquid recovery and filtering unit is also arranged below the high-speed circulating shielding pump, and the pressure expansion tank, the plate heat exchanger, the high-speed circulating shielding pump and the liquid recovery and filtering unit are connected through pipelines;

the top of the pressure expansion tank is provided with a deflation valve and a liquid supplementing port, and a liquid level sensor and a temperature sensor are arranged in the pressure expansion tank;

the high-speed circulation canned motor pump comprises a first high-speed circulation canned motor pump and a second high-speed circulation canned motor pump, and the liquid recovery and filtration unit comprises a cleaning bypass and a constant-pressure bypass.

Furthermore, the system also comprises a local bin and a peak-valley electric ice cold accumulation energy-saving device;

a heat dissipation air wall is arranged inside the local bin, the heat dissipation air wall is respectively connected with the liquid cooling exchange distribution unit and the outdoor dry-type heat dissipation unit through pipelines, a temperature control valve and a return air temperature sensor are arranged on the pipelines inside the heat dissipation air wall, and a plurality of fans are arranged outside the heat dissipation air wall;

the peak-valley electric ice cold accumulation energy-saving device comprises a variable frequency shield pump, a cold liquid expansion buffer tank and a cold accumulation cold pool which are mutually connected, wherein a liquid level sensor, a temperature sensor and a bottom suction filter are arranged in the cold liquid expansion buffer tank, a water release coil pipe, a radiating fin and a cold accumulation freezer are arranged in the cold accumulation cold pool, and a cooling liquid is filled in the cold accumulation cold pool;

the variable-frequency canned motor pump with the cold liquid expansion buffer tank are connected with the interface of the heat dissipation coil pipe at the top of the liquid cooling unit through a pipeline, and a temperature constant-temperature mixing valve is arranged on the pipeline between the cold liquid expansion buffer tank and the cold storage pool.

Further, dry-type warm cooling unit air-cooled warm water unit with the inside coolant liquid in cold-storage cold pool includes that ethanol mixes liquid and deionization industry distilled water, air-cooled warm water unit still is provided with the atomizing cooling unit, the atomizing cooling unit includes the atomizing evaporation shower nozzle.

In a second aspect, the present invention provides a method for hybrid liquid cooling control for a front end machine room, the method comprising:

collecting outdoor temperature, and determining the operation mode of the outdoor dry type heat dissipation unit according to the outdoor temperature;

controlling the opening and closing of a temperature control valve according to the operation mode, so that the cooling liquid in the outdoor dry type heat dissipation unit flows into a local cabin through a pipeline;

after the cooling liquid cools the non-liquid cooling equipment, the heat dissipation air wall of the local bin controls the opening and closing of a temperature control valve according to the collected return air temperature, so that the cooling liquid flows into a liquid-cold exchange distribution unit;

after the liquid cooling exchange distribution unit pumps the cooling liquid into the plate heat exchanger through the high-speed circulating shield pump for heat exchange, the cooling liquid flows into a radiating coil of the liquid cooling unit in the liquid cooling cabinet through a cooling liquid inlet and exchanges heat with the electronic fluorinated liquid in the liquid cooling unit;

the cooling liquid after heat exchange flows out of the liquid cooling cabinet through a warm liquid outlet of the heat dissipation coil, is pumped into the plate heat exchanger through the high-speed circulating shield pump, and then flows out of the liquid cooling exchange distribution unit;

and controlling the opening and closing of the temperature control valve according to the operation mode, so that the cooling liquid flows back to the outdoor dry type heat dissipation unit.

Further, the step of collecting the outdoor temperature and determining the operation mode of the outdoor dry-type heat dissipation unit according to the outdoor temperature includes:

the outdoor temperature is collected through a temperature sensor and compared with a first threshold value, and if the outdoor temperature is smaller than the first threshold value, the outdoor dry type heat dissipation unit dissipates heat in a dry cooling mode;

otherwise, comparing the outdoor temperature with a second threshold, and if the outdoor temperature is smaller than the second threshold, radiating the heat of the outdoor heat radiating unit in a hybrid refrigeration mode;

and if the outdoor temperature is greater than the second threshold value, the outdoor heat dissipation unit dissipates heat in a warm liquid processing mode.

Further, the step of controlling the opening and closing of the thermostatic valve according to the operation mode to make the cooling liquid in the outdoor dry type heat dissipation unit flow into the local bin through a pipeline comprises:

if the operation mode is a dry cooling mode, controlling the opening and closing of a temperature control valve to enable the cooling liquid in the dry type temperature cooling unit in the outdoor dry type heat dissipation unit to flow into a partial bin;

if the operation mode is a mixed refrigeration mode, controlling the opening and closing of a temperature control valve to enable the cooling liquid in the air-cooled warm water unit in the outdoor dry type heat dissipation unit to flow into a partial cabin;

and if the operation mode is a warm liquid processing mode, opening and closing of the temperature control valve are controlled, so that the cooling liquid in the air-cooled warm water unit in the outdoor dry type heat dissipation unit flows into the local bin.

Further, the step of controlling the opening and closing of the thermostatic valve to make the coolant flow back to the outdoor dry heat dissipation unit according to the operation mode comprises:

if the operation mode is a dry cooling mode, enabling the cooling liquid to flow back to the interior of the dry type warm cooling unit;

if the operation mode is a mixed refrigeration mode, the cooling liquid flows into the dry type warm water cooling unit for heat dissipation and then flows back into the air-cooled warm water unit;

and if the operation mode is a warm liquid treatment mode, enabling the cooling liquid to flow back to the inside of the air-cooled warm water unit.

Further, the method further comprises:

in a first preset time, the peak-valley electric ice cold accumulation energy-saving device controls the cold accumulation freezer to refrigerate and accumulate cold;

according to preset conditions, the peak-valley electric ice cold accumulation energy-saving device releases cold energy of cold accumulation through a temperature constant-temperature mixing valve and a variable-frequency shielding pump to cool the liquid-cooled cabinet, and the preset conditions comprise second preset time and a local overheating alarm event of the liquid-cooled unit.

The invention provides a mixed liquid cooling system for a front-end computer room and a control method. Through the system, compatible current common equipment size, the installation compatibility of being convenient for has adopted the coolant liquid sample various, has compromise cooling effect and economic benefits to can also realize energy saving and emission reduction, improve the availability factor of the energy, thereby improve the security and the stability of the front end computer lab operation that is located the subtropical area.

Drawings

Fig. 1 is a schematic structural diagram of a hybrid liquid cooling system for a front-end machine room according to an embodiment of the present invention;

FIG. 2 is a front view of the liquid cooling unit of FIG. 1;

FIG. 3 is a rear view of the liquid cooling unit of FIG. 1;

fig. 4 is a schematic structural view of the liquid-cooled cabinet in fig. 1;

FIG. 5 is a schematic view of the liquid exchange and dispensing unit of FIG. 1;

FIG. 6 is a schematic structural diagram of the outdoor dry heat dissipation unit of FIG. 1;

FIG. 7 is a schematic diagram of a partial plenum provided by an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a peak-valley electric ice cold storage energy-saving device provided by an embodiment of the invention;

fig. 9 is a schematic flowchart of a hybrid liquid cooling control method for a front-end machine room according to an embodiment of the present invention;

fig. 10 is a schematic of a cycle in a hybrid refrigeration mode provided by an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Referring to fig. 1, a hybrid liquid cooling system for a front-end machine room according to a first embodiment of the present invention includes: liquid cooling type rack 1 that connects gradually, liquid cooling exchange distribution unit 2 and outdoor dry-type radiating element 3, wherein, liquid cooling type rack 1 includes a plurality of liquid cooling unit 11, liquid cooling unit 11 is used for carrying out the liquid cooling to IT equipment, liquid cooling exchange distribution unit 2 is used for carrying the heat of 1 inside of liquid cooling type rack to outdoor dry-type radiating element 3, outdoor dry-type radiating element 3 is including the dry-type warm cooling unit 31 and the air-cooled warm water unit 32 of interconnect, outdoor dry-type radiating element 3 is used for carrying out outdoor heat dissipation to liquid cooling type rack 1, liquid cooling exchange distribution unit 2 and outdoor dry-type radiating element 3 can link to each other through the pipeline, and can set up the circulation of the inside liquid of a plurality of temperature-controlled valves control pipeline on the pipeline.

In order to make the hybrid liquid cooling system have good economy and practicability, it is necessary to reuse the original facilities of the front-end machine room as much as possible in the building process of the machine room to reduce unnecessary waste, and to make the installation easy, so that the liquid cooling cabinet 1 of the system takes into account the plane layout of the existing 19-inch cabinet machine room, and is compatible with all 19-inch equipment installation modes and sizes. Compatible specifications of 19-inch cabinets and common 4U and 8U module heights are adopted for the liquid cooling units 11 inside, installation and use of technicians are facilitated, the full-size depth length of the liquid cooling units 11 is 950mmm, 1U or 2U rack servers and other equipment within 800mm can be accommodated inside, the half-size length is 600mm, and edge computing equipment or short computing equipment of a switch with the length of 350mm-450mm is accommodated inside. It should be noted that the specification data in the present embodiment is only a preferable mode, and is not particularly limited, and may be changed according to actual situations, and will not be described one by one hereinafter.

As can be seen from the front view of the liquid cooling unit 11 shown in fig. 2, the 19-inch rack-mounted container liquid cooling unit 11 includes a housing 111, an electronic fluorinated liquid 112 is filled in the housing 111, and a large amount of heat energy generated during operation of IT can be taken away by the electronic fluorinated liquid 112 when IT is immersed in the electronic fluorinated liquid 112.

The front surface of the shell 111 is provided with a glass panel 113, and the LED light bar 114 is arranged above the glass panel 113, so that the operation condition of the server panel can be observed during LED illumination, and the visual management of the operation state can be realized.

The device label 115, the temperature display 116, the current energy consumption display 117, the control switch 118 and the network interface 119 are arranged on two sides of the glass panel 113, for example, the device label 115 which can be arranged on the left side of the glass panel 113 comprises a device configuration + IP address information, administrator information, a device label of a telephone, a fixed asset label and a two-dimensional code identification label, the control switch 118 comprises a restart switch and a power switch, the network interface 119 comprises a management network port, a USB socket and the like, and the device mark LOGO, the electronic fluoride liquid temperature display, the liquid inlet pipe temperature display, the LED signal indication and the like can be arranged on the right side of the glass panel 113.

Be provided with in the downside of shell 111 and fluoridize liquid import and export 120 to still be provided with bearing guide rail 121 in bottom both sides, can also set up various functions of being convenient for staff's management and operation such as LED lamp strip switch, liquid level switch and liquid level instruction near fluoridizing liquid import and export 120, and can also install the LED lamp strip at the bottom of shell 111 secretly the handle convenience and install, be convenient for observe and operate, the setting of these functions can carry out the selectivity setting of different positions and functions according to actual conditions, only as the exemplification here.

Referring to fig. 3, an interface tag 122, an equipment socket 123 and a power socket 124 are disposed on the back of the housing 111, such as a cold source input terminal tag, a service information tag, a network interface distribution tag, a power distribution tag, and the like, as well as a high definition HDMI socket, a VGA display socket, an a-way power socket, a B-way power socket, a management network port, a USB socket, and the like, so that the front-end computer room level is maintained, a two-way safe power supply design is ensured, network transmission safety is maintained, and backup time for use is not reduced, and the housing 111 is designed as a metal box, so that data safety is improved, and a risk of electromagnetic information leakage is avoided.

A heat dissipating coil 125 is provided at the top and both sides of the housing 111, respectively, the heat dissipating coil 125 is provided with a warm fluid outlet 1251 and a cold fluid inlet 1252 to facilitate the ingress and egress of the cooling fluid, and is connected to the cold fluid pipe and the warm fluid pipe at the ingress and egress using a quick leakage prevention interface and a CPC dedicated interface.

Liquid cooling unit 111 can be through the guide rail slip flexible installation of bottom with in the liquid cooling type rack 1, perhaps remove the back with the track, 4 hoisting bolts of position installation at four angles in the top of shell 111 are hoisted fixedly, and the mounting form is various and the installation is convenient.

According to the design structure of the liquid cooling unit 11, the conditions of internal equipment and liquid can be checked through the glass panel 113, the electronic fluorinated liquid 112 is drawn out in front, the equipment in the box can be replaced, upgraded and maintained conveniently by a user, a mouse and a keyboard can be directly controlled at a switch and a plug-in port of the front panel in daily operation, the temperature operation curve and the history curve of each device can be observed and recorded through network remote control, the whole 19-inch cabinet comprises a power supply PDU (power supply PDU), a 1U monitoring monitor and a 1U switch, and the maximum configuration of the cabinet device can comprise 10 liquid-cooled 4U or 5 8-U19-inch rack type container liquid cooling units 11.

The liquid cooling unit 11 in the embodiment is simple to operate and convenient to maintain, a plurality of networks and USB interfaces are arranged in the front standard of the liquid cooling unit, a user can conveniently access the UTP network cable and the mouse keyboard to control, an LED lighting switch, a server start-stop switch, a restart key switch and the like are arranged in the front design, a quick-plugging anti-leakage connector and a power socket at the rear part of the liquid cooling module are arranged at the interface of the power socket, 2C 14-10A interfaces are arranged in the 3U, and 2C 20-16A interfaces are arranged in the 5U, and two input ways are adopted. The quick release latch of the upper cover of the case ensures that a user can quickly assemble and disassemble equipment such as a server and the like. The whole device has a guide rail pulling-out function, a user can conveniently move the device out of the cabinet, and the built-in server equipment is easily hung out by adopting the hoisting equipment. The electronic fluorinated liquid designed in the sealed module box belongs to insulating medium fluid which is insulating, safe, non-toxic, non-flammable and non-ozone-depletion, can not chemically react with the internal material of equipment, can not cause aging and corrosion of components, and has a design service life of at least 20 years. By adopting the immersion cooling of the electronic fluorinated liquid boiling at 50 ℃ or 60 ℃, the nearly silent operation of the whole machine room can be realized, and more than 95 percent of heat is conveyed to the plate heat exchanger in the system through the liquid. By eliminating the electronic fans inside the computer, server, switch, etc., the power consumption of the computing device or server, network device is reduced by 10%, thus immediately saving energy.

Referring to fig. 4, the liquid cooling units 11 are installed in the cabinet to form the liquid cooling cabinet 1 of the system, the system may include a plurality of liquid cooling cabinets 1, and the front surfaces of the liquid cooling units 11 further provide quick connectors, so as to easily extract the dielectric liquid when the server equipment needs to be upgraded or maintained, thereby ensuring the recycling of the electronic fluorinated liquid and reducing waste. The observation window of configuration toughened glass on the front panel of liquid cooling unit 11 can be when opening LED lighting switch, observes the liquid colour and the state of the inside to and observe built-in server equipment signal lamp state, consider visual management needs simultaneously, show the current-voltage instruction of operating fluid temperature and consumption electric energy on the panel, whole frame top design rack level watch-dog provides economic high efficiency and nimble environmental monitoring. The browser access in the whole province can be carried out through the local area network, and the remote temperature monitoring in the device is provided, so that the equipment is prevented from being broken down due to extreme environments. A leak float sensor is included for monitoring liquid leak detection in the heat sink circuit. The top of the rack is also provided with a 1U rack type 10Gb Ethernet switch, and the design with rich functions is adopted to support virtualization, integration of enhanced Ethernet (CEE), high availability and enterprise level layer 2 and layer 3 functions, so that lossless and low-delay performance can be provided. The switch provides line speed, high bandwidth switching, filtering, and traffic queuing without delaying data. The top of the whole cabinet is provided with a metering distribution box with a double-channel input 63A, a metering ammeter and an air circuit breaker are arranged in the metering distribution box, the whole electricity consumption of the cabinet is monitored and recorded, and the calculation of the PUE (general purpose entity) in the whole year of a machine room is guaranteed to be used as the basis of basic data. The metered power distribution unit provides real-time remote monitoring of the connected load. User-defined alarm thresholds, monitoring for potential device circuit overload.

Referring to fig. 5, the liquid cooling exchange distribution unit 2 is an intermediate link between the indoor circulation and the outdoor air cooling, and is also one of the key devices, and each front-end machine room can be configured with one set of liquid cooling exchange distribution unit 2. The liquid cooling exchange distribution unit 2 in the system comprises an exchange distribution cabinet 21, a plate heat exchanger 22 arranged in the exchange distribution cabinet 21, a high-speed circulation shield pump 23 arranged below the plate heat exchanger 22, a pressure expansion tank 24 arranged above the plate heat exchanger 22, and a liquid recovery and filtration unit 25 arranged below the high-speed circulation shield pump 23; the top of the pressure expansion tank 24 is provided with a deflation valve 241 and a liquid supplementing port 242, and the inside of the pressure expansion tank 24 is provided with a liquid level sensor 243 and a temperature sensor 244.

The pressure expansion tank 24, the plate heat exchanger 22, the high-speed circulation shield pump 23 and the liquid recovery and filtration unit 25 are connected through pipelines, the high-speed circulation shield pump 23 comprises a first high-speed circulation shield pump 231 and a second high-speed circulation shield pump 232, and the liquid recovery and filtration unit 25 comprises a cleaning bypass 251 and a constant pressure bypass 252.

The liquid cooling exchange distribution unit 2 transfers the heat of the electronic fluorinated liquid at 45-50 ℃ in the liquid cooling unit 11 to the outdoor dry-type heat dissipation unit 3 through the plate heat exchanger 22, so as to simplify the management of the front-end machine room.

In order to meet the heat dissipation requirement of a front-end machine room with the refrigerating capacity below 80KW, the system adopts a permanent-magnet high-speed circulating canned motor pump technology, stepless debugging is realized by feeding back a detected liquid temperature to a variable-frequency permanent-magnet high-speed circulating canned motor pump, the machine set is slowly accelerated and decelerated in a variable-speed state, the machine room can be kept in silent operation, a touch screen is configured in front to observe the operation state and parameter display, visual management is facilitated, an application interface of an indoor water-cooling air conditioner is compatible, and the environment temperature inside the machine room is conveniently reduced.

Referring to fig. 6, the outdoor dry heat dissipation unit 3 in the system includes a dry warm cooling unit 3a and an air-cooled warm water unit 3b, both units adopt a mode of driving an electrical control board and a direct current fan, and the outdoor dry heat dissipation unit 3 is an automatic speed-changing low-noise heat sink, and belongs to a main heat dissipation device of a front-end computer room.

In order to meet the heat dissipation requirement of a front-end machine room with the refrigerating capacity below 80KW, the outdoor dry type heat dissipation unit 3 adopts a low-noise direct-current variable-frequency permanent-magnet efficient heat dissipation fan 31, the rest of the structure is similar to that of a conventional dry type warm cooling unit and an air-cooling warm water unit, the outdoor dry type heat dissipation unit comprises a liquid storage tank 32 and a fin radiator 33, an air expansion tank 321 and an automatic air release valve 322 are arranged at the top of the liquid storage tank, a liquid recovery device is arranged at the bottom of the liquid storage tank, a liquid level sensor 323 and a temperature sensor 324 are further arranged inside the liquid storage tank, and the air-cooling warm water unit further comprises an EC direct-current compressor 34, a Freon evaporation coil 325 and a second liquid storage tank 35 which are arranged inside the liquid storage tank. For better energy conservation and environmental protection, the cooling liquid can be connected with a shell and tube heat exchanger in series before passing through the radiating fins, so that hot water of waste heat of a machine room can be conveniently used by activity centers or residents of nearby communities, more people can be helped and served by waste heat utilization, and the purposes of energy conservation and environmental protection are further achieved.

The outdoor dry-type heat dissipation unit in the embodiment can be mounted on an outdoor wall or directly mounted on the ground or floor of a residential building to operate in a manner similar to a multi-cascade central air conditioner outdoor unit, and a direct-current permanent-magnet low-noise axial-flow fan is used for efficient heat dissipation. A liquid supplementing tank and an expansion liquid tank are arranged at the high position of the condenser to exhaust and expand the system, and a sensor is arranged on the condenser to obtain a smoother operation effect, and an extraction and recovery interface of the cooling liquid is arranged at the lowest position. A vertical liquid storage tank is designed in a right side bin of the outdoor dry cooler, so that the vertical liquid storage tank can be used as a buffer liquid tank, the noise of unit operation can be reduced, liquid surge is reduced, and a liquid cooling pipeline system can stably operate. And because the outdoor dry-type radiating unit can adopt a warm liquid processing mode when the temperature is higher than 35 ℃, the atomization cooling unit 37 is arranged on the outer side of the air-cooled warm water unit and comprises an atomization evaporation nozzle for assisting the outdoor unit to cool by an ultrasonic water atomization evaporation cooling mode.

In order to ensure the purity of the electronic fluorinated liquid in the indoor part, the system uses liquid different from indoor liquid as cooling liquid in the outdoor dry type heat dissipation unit 3, the cooling liquid and the electronic fluorinated liquid are isolated from two different liquids while heat exchange is carried out by a stainless steel plate type heat exchanger, and a specific liquid cooling circulation flow is explained in a subsequent control method.

Referring to fig. 7, since not all the devices can be cooled by liquid cooling, for devices that cannot be cooled by liquid cooling, such as tower devices, UPS, communication power sources, and battery packs, the system further preferably includes a local chamber 4, where the local chamber 4 may be made of organic glass, and is used to place the above non-liquid-cooled devices, a heat dissipation air wall 41 is disposed inside the local chamber 4, the heat dissipation air wall 41 is connected to the outdoor dry heat dissipation unit 3 and the liquid exchange and distribution unit 2 through pipes, a temperature control valve 411 and an air return sensor 412 are disposed on the pipes inside the heat dissipation air wall 41, a plurality of fans 413 are disposed outside the heat dissipation air wall 41, and when the cooling liquid flows through the heat dissipation air wall 41, the heat dissipation air wall 41 can drive the fans to cool the internal ambient temperature of the local chamber 4 through the temperature of the cooling liquid.

Referring to fig. 8, for the purpose of further improving cooling and energy saving, the system further includes a peak-valley electric ice cold-storage energy-saving device 5, which includes a variable frequency canned motor pump 51, a cold liquid expansion buffer tank 52, and a cold-storage cold pool 53 that are connected to each other, a liquid level sensor 521, a temperature sensor 522, and a bottom suction filter 523 are disposed inside the cold liquid expansion buffer tank 52, a water-releasing cold coil 532, a heat dissipation fin 533, and a cold-storage cold pool 534 are disposed inside the cold-storage cold pool 53, and a cooling liquid 531 is filled inside the cold-storage cold pool 53, the variable frequency canned motor pump 51 and the cold liquid expansion buffer tank 52 are connected to an interface of a heat dissipation coil 125 on the top of the liquid cooling unit 11 through a pipeline, and a temperature constant temperature mixing valve 54 is further disposed on the pipeline between the cold liquid expansion buffer tank 52 and the cold-storage cold pool 53, wherein the variable frequency canned motor pump 51 is controlled according to time, the temperature constant temperature mixing valve 54 is set at 15-25 degrees, the cold-storage cold pool 534 can be an outdoor cold-storage dry type cold storage with 1888L capacity of a primary energy-efficient dual compressor, and the cooling liquid 531 and the cold-storage dry-storage cold-dissipation unit 3 are filled with the same cooling liquid.

The peak valley electricity ice cold-storage economizer 5 of this system installs in the intermediate link, be connected with liquid cooling rack 1, when mainly solving the interim commercial power interrupt of front end computer lab, information equipment needs incessant continuous operation, the computer lab relies on UPS to provide continuous electric energy operation for information equipment, operate under 35 ℃ high temperature environment, the off-premises station needs start-up compressor operation, meet the commercial power interrupt, the generator temporarily can not in time generate electricity and continue the operation, need launch the ice cold storage container when this, release the cold source, the heat of equipment is neutralized in going on, realize the incessant refrigerated target of computer lab equipment, can also utilize the necessary cold source of the cheap price storage of valley electricity simultaneously, realize holistic saving charges of electricity spending purpose.

Based on the structure of the system, the following describes a control process of the hybrid liquid cooling system, and referring to fig. 9, based on the same inventive concept, a hybrid liquid cooling control method for a front-end computer room according to a second embodiment of the present invention includes steps S10 to S60:

and S10, acquiring outdoor temperature, and determining the operation mode of the outdoor dry type heat dissipation unit according to the outdoor temperature.

The outdoor dry-type heat dissipation unit of the system is designed to automatically regulate the speed according to the outdoor temperature and select different operation modes for heat dissipation, and the system comprises the following specific steps:

step S101, collecting outdoor temperature through a temperature sensor, comparing the outdoor temperature with a first threshold, and if the outdoor temperature is smaller than the first threshold, radiating by an outdoor dry-type radiating unit in a dry cooling mode;

step S102, if not, the outdoor temperature is compared with a second threshold value, and if the outdoor temperature is smaller than the second threshold value, the outdoor heat dissipation unit dissipates heat in a mixed refrigeration mode;

step S103, if the outdoor temperature is greater than the second threshold value, the outdoor heat dissipation unit dissipates heat in a warm liquid processing mode.

It can be clearly seen that the outdoor dry-type heat dissipation unit mainly has three operation modes, and according to the actual situation of the subtropical zone temperature, we can set different heat dissipation modes, for example, adopt the dry cooling mode when the outdoor temperature is less than 25 ℃, adopt the mixed refrigeration mode when the outdoor temperature is higher than 25 ℃ and lower than 35 ℃, adopt the warm liquid processing mode when the outdoor temperature is higher than 35 ℃, start the atomization cooling unit simultaneously, adopt the ultrasonic water atomization evaporation cooling mode to assist the outdoor unit to cool down, thereby ensure that the return liquid temperature from the heat dissipation pipeline to the indoor can be adjusted at 30-40 ℃.

S20, controlling the opening and closing of a temperature control valve according to the operation mode, so that the cooling liquid in the outdoor dry type heat dissipation unit flows into a local cabin through a pipeline;

step S30, after the heat dissipation air wall of the local bin cools the non-liquid cooling equipment through the cooling liquid, opening and closing of a temperature control valve are controlled according to the collected return air temperature, so that the cooling liquid flows into a liquid-cooling exchange distribution unit;

step S40, after the liquid cooling exchange distribution unit pumps the cooling liquid into the plate heat exchanger through the high-speed circulating shield pump for heat exchange, the cooling liquid flows into a radiating coil of the liquid cooling unit in the liquid cooling cabinet through a cooling liquid inlet and exchanges heat with the electronic fluorinated liquid in the liquid cooling unit;

step S50, the cooling liquid after heat exchange flows out of the liquid cooling cabinet through a warm liquid outlet of the heat dissipation coil, is pumped into the plate heat exchanger through the high-speed circulation shielding pump and then flows out of the liquid cooling exchange distribution unit;

and S60, controlling the opening and closing of the temperature control valve according to the operation mode, so that the cooling liquid flows back to the outdoor dry type heat dissipation unit.

The circulation process of the cooling liquid in the outdoor dry heat dissipation unit can be seen through the steps, and the difference is mainly that the used cooling liquid comes from different units for different operation modes.

In a dry cooling mode, the outdoor dry-type heat dissipation unit mainly uses a dry-type warm cooling unit for heat dissipation, namely, a pipeline is controlled by opening and closing a temperature control valve, cooling liquid in the dry-type warm cooling unit is used for circulation, and the cooling liquid flows through a local cabin, a liquid exchange and distribution unit and a liquid cooling cabinet and then flows back to the inside of the dry-type warm cooling unit through the liquid exchange and distribution unit;

in a mixed refrigeration mode, the cooling liquid in the air-cooling and warm water unit is controlled to circulate through the temperature control valve, and does not directly flow back to the air-cooling and warm water unit after flowing out of the liquid exchange and distribution unit through heat exchange, and flows into the dry-type temperature cooling unit firstly, then flows back to the inside of the air-cooling and warm water unit after heat dissipation;

and in the warm liquid treatment mode, the cooling liquid flows out of the air-cooled warm water unit, and directly flows back into the air-cooled warm water unit from the liquid exchange and distribution unit after the circulation of heat exchange.

The heat dissipation mode of adopting different operation modes aiming at different environmental temperatures not only can provide good heat dissipation effect, but also is energy-saving and environment-friendly. The system configuration and the cooling liquid circulation process in the more complicated hybrid cooling mode will be described in detail with reference to fig. 10.

The hybrid liquid cooling system can be divided into an economical type and a safe type according to different configurations, wherein the economical type configuration only uses one set of outdoor dry type heat dissipation units, namely one set of dry type warm cooling unit and an air-cooled warm water unit, and only one liquid cooling exchange distribution unit is arranged, the inside of the liquid cooling type rack is in a 1+1 redundant configuration, the safe type configuration is that the outdoor heat dissipation adopts a double system, namely two sets of outdoor dry type heat dissipation units in a main-standby mode, and the liquid cooling exchange distribution unit also adopts the main-standby redundant mode. In this embodiment, we assume an economical single configuration.

The mixed liquid cooling system can be divided into an indoor machine room and an outdoor heat dissipation part, wherein two liquid cooling type cabinets, a liquid cooling exchange distribution unit and a local chamber are arranged in the indoor machine room, and the outdoor heat dissipation part adopts an outdoor dry type heat dissipation unit. All the structures of the system are connected through pipelines. Meanwhile, an antistatic floor is arranged in the machine room, and an LED lighting lamp supporting a battery or solar energy can be arranged on the top of the machine room, so that the pipeline can be hidden and laid below the floor for the safety and the attractiveness of wiring.

The outdoor temperature is collected through an air temperature sensor arranged at the position of the shadow, a temperature control valve on a pipeline is controlled through the outdoor temperature, when the outdoor temperature is in the range of 25-35 ℃, the opening and closing of the temperature control valve are controlled, at the moment, cooling liquid, namely ethylene glycol 35% aqueous solution, in a liquid storage tank of an air-cooled warm water unit enters the pipeline through a liquid outlet, the temperature of output water is 17-30 ℃, the cooling liquid flows into a heat dissipation air wall of a local warehouse along with the pipeline, the temperature of the cooling liquid is taken away by a fan through the heat dissipation air wall, the temperature of the cooling liquid is increased at the moment, meanwhile, the temperature control valve is also arranged on the pipeline inside the heat dissipation air wall, the opening and closing of the temperature control valve are controlled through the temperature collected by a return air temperature sensor, the main purpose is to prevent condensation and dew formation of other parts in the warehouse due to supercooling of the cooling liquid, the cooling liquid is taken away by the heat dissipation air wall to have a certain temperature, and therefore, when the cooling liquid flows out of the local warehouse, the temperature of the cooling liquid is slightly higher than the temperature when the cooling liquid flows in.

The cooling liquid flows into a second high-speed circulation shield pump of the liquid exchange and distribution unit through a pipeline, is pumped into the plate heat exchanger by the second high-speed circulation shield pump, and is subjected to heat exchange with the output warm water in the plate heat exchanger, for example, if the temperature of input water is 20-25 ℃, the temperature of output water is about 25-30 ℃.

The inside liquid cooling unit of liquid cooling type rack can be flowed into through the pipeline after the coolant liquid flows from plate heat exchanger, the cold liquid entry through the heat dissipation coil pipe of every liquid cooling unit flows in promptly, the coolant liquid can snakelike flow in heat dissipation coil pipe, take away the heat that the inside electron of liquid cooling unit fluorinated liquid and produced, the coolant liquid after the heat exchange can flow out the liquid cooling unit through the warm liquid export, and flow back liquid exchange and distribution unit along the pipeline, promptly the coolant liquid can be gone into plate heat exchanger through first high-speed circulation canned motor pump, carry out the heat exchange with the coolant liquid that flows in from local bin, at this moment, the temperature of coolant liquid is a little reduction, and too high for preventing into water temperature, plate heat exchanger top has still set up the pressure expansion tank and has set up the pipeline sight glass on hot water line.

When the cooling liquid flows out of the liquid exchange and distribution unit, the cooling liquid does not directly flow back to the air-cooled warm water unit, but flows into the dry-type warm water unit for pre-cooling, and flows back to the air-cooled warm water unit after pre-cooling, so that one circulation of the cooling liquid, namely one cooling circulation, is completed, and the cooling of the whole mixed liquid system is completed through continuous circulation of the cooling liquid.

For the heat dissipation in the dry cooling mode, the cooling liquid flows out of the dry warm cooling unit and finally flows back to the dry warm cooling unit, for the heat dissipation in the warm liquid processing mode, the cooling liquid flows out of the air-cooled warm water unit and finally flows back to the air-cooled warm water unit, and other circulation processes are consistent with the mixed refrigeration mode, and the processes can be referred to and will not be described any more.

Further, the method further comprises:

s70, in a first preset time, the peak-valley electric ice cold accumulation energy-saving device controls a cold accumulation freezer to refrigerate and accumulate cold;

and S80, releasing cold energy of cold accumulation by the peak-valley electric ice cold accumulation energy-saving device through a temperature constant-temperature mixing valve and a variable-frequency shielding pump to cool the liquid-cooled cabinet according to preset conditions, wherein the preset conditions comprise second preset time and a local overheating alarm event of the liquid cooling unit.

In order to further reduce energy consumption, a peak-valley electric ice cold accumulation energy-saving device is added in a cooling liquid cooling circulation, wherein the peak-valley electric ice cold accumulation energy-saving device comprises an emergency refrigeration operation mode, an energy-saving peak-valley operation mode and a local overheating protection operation mode, and specifically comprises the following steps:

(1) emergency cooling mode of operation

In the operation mode, a first-level energy efficiency refrigeration and cold accumulation freezer is started to refrigerate by utilizing an idle time period of an urban power grid from 1 point to 6 points at night, namely a time window of low-price electricity charge, and the glycol solution is subjected to low-temperature liquid mixing block. The cooling cabinet is internally provided with a heat dissipation stainless steel coil pipe which is communicated with a cooling liquid pipeline system and linked with a variable frequency shielding pump set through a temperature controller, so that the release of the cold energy of ice storage is realized, the heat dissipation requirement of equipment in a short time is realized through the released cold energy, the cold storage capacity can be set according to the corresponding time interval of a generator and a generator of a user, the cold energy of the equipment is generally designed to be required for 3-4 hours, and the heat dissipation capacity of the equipment required by the running time when the commercial power is interrupted is maintained.

(2) Energy-saving peak-valley mode of operation

Because the ice storage mode operation is carried out at 1-6 o' clock at night, the power failure at the time is relatively less, and basically, the power failure interruption accident occurs at the very hot time in the day. After the cold accumulation equipment is operated for cold accumulation, when the solar radiation is larger in the period from 12 pm to 4 pm in summer, and the peak time is also higher in the electric charge of a mains supply power grid, the ice storage refrigerator is triggered to release a cold source through time control at the moment, so that the peak electric charge consumed by mechanical refrigeration in high-temperature time is reduced, the expenditure of the electric charge is reduced, and the purpose of reducing the whole electric charge expenditure of a front-end computer room is realized.

(3) Local overheat protection mode of operation

When the alarm event of local overheating occurs in the equipment of the liquid cooling unit of the 19-inch rack type container, low-temperature cooling needs to be started quickly, the cold source for ice cold accumulation is released quickly by the controller, and the requirement for quick heat dissipation of a certain liquid cooling device in a short time is met.

Through the operation mode, the energy-saving effect of the system is improved while the peak-valley electric ice cold storage energy-saving device added in the system can realize real-time rapid cooling.

To sum up, the mixed liquid cooling system and the control method for the front-end computer room provided by the embodiment of the invention are characterized in that the system comprises a liquid cooling cabinet, a liquid cooling exchange distribution unit and an outdoor dry-type heat dissipation unit which are sequentially connected; the liquid cooling type cabinet comprises a plurality of liquid cooling units; the liquid cooling exchange distribution unit comprises a pressure expansion tank, a plate heat exchanger and a high-speed circulation shield pump which are sequentially connected; the outdoor dry type heat dissipation unit comprises a dry type warm cooling unit and an air-cooled warm water unit which are connected with each other. The cooling system disclosed by the invention can be compatible with the existing common equipment size, is convenient to install, apply and maintain, the cooling liquid is visual and can be liquid in various forms, the economy is considered while the cooling is satisfied, the energy use efficiency is improved, the energy is saved, the emission is reduced, the resource is not wasted, the operation cost of a machine room is reduced, the machine room is not influenced by the environment, the noise is reduced in a silent operation mode, and the safety and the stability of the machine room in operation are improved.

The embodiments in this specification are described in a progressive manner, and all the same or similar parts of the embodiments are directly referred to each other, and each embodiment is described with emphasis on differences from other embodiments. It should be noted that, the technical features of the embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several preferred embodiments of the present application, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these should be construed as the protection scope of the present application. Therefore, the protection scope of the present patent application shall be subject to the protection scope of the claims.

Claims

1. A hybrid liquid cooling system for a front end machine room, comprising:

the liquid cooling cabinet comprises a plurality of liquid cooling units;

2. The hybrid liquid cooling system for a front end machine room of claim 1, wherein the liquid cooling unit comprises:

the electronic fluorination device comprises a shell, wherein electronic fluorination liquid is filled in the shell, a glass panel is arranged on the front surface of the shell, an LED lamp strip is arranged on the upper side of the glass panel, and equipment labels, temperature display, current energy consumption display, a control switch and a network interface are arranged on two sides of the glass panel;

3. The hybrid liquid cooling system for a front end computer room of claim 2, wherein the liquid-cooled switched distribution unit comprises:

4. The hybrid liquid cooling system for a front end computer room of claim 2, further comprising a local bin and a peak-to-valley ice thermal storage energy saving device;

the variable-frequency canned motor pump and the cold liquid expansion buffer tank are connected with the interface of the heat dissipation coil pipe at the top of the liquid cooling unit through a pipeline, and a temperature constant-temperature mixing valve is arranged on the pipeline between the cold liquid expansion buffer tank and the cold storage cold pool.

5. The mixed liquid cooling system for the front-end machine room as claimed in claim 4, wherein the cooling liquids inside the dry warm cooling unit, the air-cooled warm water unit and the cold storage cold pool comprise an ethanol mixed liquid and deionized industrial distilled water, and the air-cooled warm water unit is further provided with an atomization cooling unit comprising an atomization evaporation nozzle.

6. A hybrid liquid cooling control method for a front-end machine room, comprising:

the cooling liquid after heat exchange flows out of the liquid cooling cabinet through a warm liquid outlet of the heat dissipation coil, is pumped into the plate heat exchanger through the high-speed circulation shielding pump and then flows out of the liquid cooling exchange distribution unit;

and controlling the opening and closing of the temperature control valve according to the operation mode to enable the cooling liquid to flow back to the outdoor dry type heat dissipation unit.

7. The hybrid liquid cooling control method for a front-end computer room of claim 6, wherein the step of collecting an outdoor temperature and determining an operation mode of the outdoor dry heat dissipation unit according to the outdoor temperature comprises:

and if the outdoor temperature is greater than the second threshold value, the outdoor heat dissipation unit adopts a warm liquid treatment mode to dissipate heat.

8. The hybrid liquid cooling control method for the front end machine room as claimed in claim 7, wherein the step of controlling the opening and closing of the thermostatic valve according to the operation mode to make the cooling liquid inside the outdoor dry heat dissipation unit flow into the local chamber through the pipeline comprises:

if the operation mode is a mixed refrigeration mode, opening and closing of a temperature control valve are controlled, so that cooling liquid in an air-cooled warm water unit in the outdoor dry type heat dissipation unit flows into a local bin;

and if the operation mode is a warm liquid treatment mode, controlling the opening and closing of the temperature control valve to enable the cooling liquid in the air-cooled warm water unit in the outdoor dry type heat dissipation unit to flow into the partial bin.

9. The hybrid liquid cooling control method for a front end computer room as claimed in claim 7, wherein said step of controlling the opening and closing of said thermo valve to allow the coolant to flow back to said outdoor dry heat sink unit according to said operation mode comprises:

if the operation mode is a mixed refrigeration mode, enabling the cooling liquid to flow into the dry type warm cooling unit for heat dissipation and then flow back into the air-cooling warm water unit;

10. The hybrid liquid cooling control method for a front end machine room of claim 6, further comprising: