阅读说明：本技术 一种全时自然冷的一体化柜级空调 (Full-time natural cooling integrated cabinet-level air conditioner ) 是由 蔡小兵 杨夏 袁明辉 徐芝斌 梁林 孙应松 罗庆保 于 2021-09-10 设计创作，主要内容包括：本发明公开一种全时自然冷的一体化柜级空调,包括上下分布的定向冷却机柜和分布式空气处理单元,定向冷却机柜包括封闭式同程热通道和服务器安装空间,分布式空气处理单元包括机柜柜体,机柜柜体上设置有回风口和送风口,机柜柜体内设置有换热组件；服务器安装空间的排风口通过封闭式同程热通道与回风口连通,送风口通过开放式冷通道与服务器安装空间的进风口连通。本发明使用一体化空调结构,减少了集中制冷过程中的多个环节,制冷系统得到简化,综合造价实现降低；全时自然冷的空调结构,空调制冷效率大幅提升,分布式空气处理单元中的分布式制冷方式使得一体化柜级空调的适用范围扩展至数柜至数千柜均可实现较低PUE。(The invention discloses a full-time natural cooling integrated cabinet-level air conditioner, which comprises a directional cooling cabinet and a distributed air processing unit, wherein the directional cooling cabinet and the distributed air processing unit are distributed up and down; the air outlet of the server installation space is communicated with the air return inlet through a closed same-process hot channel, and the air supply outlet is communicated with the air inlet of the server installation space through an open cold channel. The invention uses the integrated air-conditioning structure, reduces a plurality of links in the centralized refrigeration process, simplifies the refrigeration system and reduces the comprehensive cost; the full-time natural cooling air conditioner structure has the advantages that the air conditioner refrigeration efficiency is greatly improved, and the application range of the integrated cabinet-level air conditioner is expanded to several cabinets to thousands of cabinets by the distributed refrigeration mode in the distributed air processing unit, so that lower PUE can be realized.)

1. An integrated cabinet-level air conditioner capable of cooling naturally at all times, which is characterized by comprising:

the directional cooling machine cabinet comprises a server installation space and a closed same-process heat channel, wherein an air outlet is formed in one side of the server installation space, and an air inlet is formed in the other side of the server installation space;

the distributed air processing unit is arranged below the directional cooling cabinet and comprises a cabinet body, a heat exchange assembly is arranged in the cabinet body, an air return opening and an air supply opening are formed in the cabinet body, and the heat exchange assembly is positioned on a path of airflow flowing from the air return opening to the air supply opening; the air outlet is communicated with the air return inlet through the closed same-process hot channel, and the air supply outlet is communicated with the air inlet through the open cold channel; the distributed air processing unit also comprises a fan, the fan can enable hot air discharged by the air outlet to sequentially pass through the closed same-process heat channel and the air return inlet, then exchange heat with the heat exchange assembly, and send cold air formed after heat exchange to the air supply outlet;

the heat exchange assembly comprises a heat exchange water path and a refrigeration path, the heat exchange water path is independently right for naturally cooling hot air exhausted from the air outlet, or the heat exchange water path and the refrigeration path are jointly right for cooling the hot air exhausted from the air outlet.

2. The integrated cabinet-level air conditioner of claim 1, further comprising a controller in communication with the heat exchange assembly and the fan.

3. The integrated cabinet-level air conditioner of claim 2, wherein the heat exchange water circuit comprises a composite coil pipe, and a circulating cooling water circuit is formed in the composite coil pipe;

the refrigeration path comprises a condenser, a fluorine-cooled evaporator, a compressor and a throttling device; the water outlet pipe of the condenser is connected with the water inlet of the composite coil pipe, and the water inlet pipe of the condenser is connected with the water outlet of the composite coil pipe; the gas vent of compressor with the intake-tube connection of condenser, the outlet duct of condenser with throttling arrangement connects, throttling arrangement's drain pipe with the feed liquor union coupling of the cold evaporimeter of fluorine, the outlet duct of the cold evaporimeter of fluorine with the induction port of compressor is connected to form the circulative cooling fluorine way.

4. The integrated cabinet-level air conditioner according to claim 3, wherein the water outlet pipe of the condenser is provided with a return water temperature sensor; the air return inlet is provided with an air return temperature sensor; the air supply outlet is provided with an air supply temperature sensor; an exhaust pressure sensor and an outlet temperature sensor are arranged at an exhaust port of the compressor; the air suction port of the compressor is provided with an air suction pressure sensor and an inlet temperature sensor;

the return water temperature sensor, the return air temperature sensor, the air supply temperature sensor, the exhaust pressure sensor, the inlet temperature sensor, the outlet temperature sensor and the suction pressure sensor are all in communication connection with the controller.

5. The integrated cabinet-level air conditioner according to claim 1 or 3, wherein when the temperature of the cooling water inlet of the heat exchange waterway is not more than 22 ℃, the heat exchange waterway can independently meet the temperature requirement of the air inlet of the server installation space; when the cooling water inlet temperature of the heat exchange water path is greater than 22 ℃ and not more than 35 ℃, the heat exchange water path performs primary heat extraction on hot air, and then the refrigeration path performs secondary refrigeration on the hot air subjected to the primary heat extraction, so that a full-time natural cold heat exchange mode is realized.

6. The integrated cabinet-level air conditioner of claim 1, wherein the fan is a centrifugal fan; the centrifugal fan is installed on the air supply outlet through a fan installation assembly.

7. The integrated cabinet-level air conditioner according to claim 1, wherein a cooling cavity is formed between the return air inlet and the supply air outlet at an interval, and the heat exchange assembly is arranged in the cooling cavity; the air return inlet and the air supply outlet are communicated with the cooling cavity.

8. The integrated cabinet-level air conditioner according to any one of claims 2 to 4, wherein a high-temperature protection window is further arranged on the directional cooling machine cabinet, an electric window opener is arranged on the high-temperature protection window, and the electric window opener is in communication connection with the controller;

when the return air temperature of the return air inlet is higher than a set value or the fan fails, the controller controls the electric window opener to open the high-temperature protection window.

9. The integrated cabinet-level air conditioner of claim 1, wherein at least two of the integrated cabinet-level air conditioners are connected in parallel to the open type cold channel to form a shared cold pool and realize cold sharing.

10. The integrated cabinet-level air conditioner of claim 9, wherein the distributed air handling units of any one of the integrated cabinet-level air conditioners have 20% capacity backup to compensate for capacity of a failed air conditioning unit.

Technical Field

The invention belongs to the field of air conditioners, relates to a cabinet-level air conditioner of a machine room, and particularly relates to an integrated cabinet-level air conditioner capable of achieving full-time natural cooling.

Background

With the higher and higher heat density of the single server cabinet, the cooling mode and the airflow organization change more and more. The traditional cooling method mainly comprises two methods: one is a room-level direct expansion precision air conditioner, which usually adopts a mode of reasonably distributing an air supply channel, a hot channel and a cold channel under a floor, and because air flow is difficult to effectively organize, the air conditioner can only meet the heat dissipation requirement of a single cabinet below 4kW, and meanwhile, because of the lower refrigeration efficiency, the air conditioner is only used in a DC machine room with a smaller scale; the other mode is a centralized water-cooled room-level and column-level air conditioner, which realizes centralized refrigeration and improves the refrigeration efficiency compared with a room-level direct expansion precision air conditioner, but the refrigeration range is still limited to the room level or the row level, and the return air of the air conditioner is difficult to be accurately controlled to cause over-refrigeration when the load is low.

In order to solve the heat dissipation requirement of a machine room with higher heat density and the air conditioning airflow organization, the centralized refrigeration and the top water-cooling coil cooling and fluorine-cooling back plate heat exchange cooling mode are developed. The cooling mode of the overhead water-cooling coil pipe reduces the energy consumption of the fan of the tail air conditioner by utilizing the natural flow mode of air cooling and heating, but the cold water in the overhead coil pipe causes great hidden trouble to the safety of the server. And the cold backplate heat exchange cooling mode of fluorine is because heat exchange coil is on the door plant behind the rack, and is nearer apart from the server power, therefore adopts freon as the secondary refrigerant in the computer lab side, carries out water fluorine exchange once in the computer lab outside usually, and every rack all need independently insert fluorine pipe to backplate air conditioner from the computer lab outside, has also reduced heat exchange efficiency when leading to the investment higher. The two modes of overhead water-cooling coil cooling and fluorine-cooling back plate heat exchange cooling solve the problem of high energy consumption of airflow organization and a tail end fan, but also bring new problems of water leakage risk, investment increase and the like.

Under the background that the heat density of a single cabinet is higher and higher, the room-level air conditioner cannot meet the requirements of most users, the natural cooling utilization of the inter-row air conditioner is not maximized, and further reduction of PUE (Power Usage efficiency, which is an index for evaluating the energy efficiency of a data center and is a ratio of all energy consumed by the data center to energy used by IT loads) cannot be realized. Although the cabinet-level air conditioner further shortens the refrigerating distance and the cooling distance to zero, the problems of air flow organization and fan energy consumption are effectively solved, the problems that how to use natural cooling to a greater extent, how to improve the mechanical refrigerating efficiency and how to increase the reliability of an air conditioning system are solved while the fan energy consumption is reduced are the main problems in the existing data center and edge computing industries.

Disclosure of Invention

The invention aims to provide an all-time natural cooling integrated cabinet-level air conditioner which is simple and reasonable in structure, high in operation reliability and greatly improved in refrigeration efficiency.

In order to achieve the purpose, the invention provides the following scheme:

the invention provides a full-time natural cooling integrated cabinet-level air conditioner, which comprises:

the directional cooling machine cabinet comprises a server installation space and a closed same-process heat channel, wherein an air outlet is formed in one side of the server installation space, and an air inlet is formed in the other side of the server installation space;

the distributed air processing unit is arranged below the directional cooling cabinet and comprises a cabinet body, a heat exchange assembly is arranged in the cabinet body, an air return opening and an air supply opening are formed in the cabinet body, and the heat exchange assembly is positioned on a path of airflow flowing from the air return opening to the air supply opening; the air outlet is communicated with the air return inlet through the closed same-process hot channel, the air supply outlet is communicated with the air inlet through an open type cold channel, and the open type cold channel is a refrigerating space of the integrated cabinet-level air conditioner; the distributed air processing unit also comprises a fan for providing power for airflow organization, and the fan can enable hot air discharged by the air outlet to sequentially pass through the closed same-path hot channel and the air return port, then exchange heat with the heat exchange assembly, and send cold air formed after heat exchange to the air supply port;

the heat exchange assembly comprises a heat exchange water path and a refrigeration path, the heat exchange water path is independently right for naturally cooling hot air exhausted from the air outlet, or the heat exchange water path and the refrigeration path are jointly right for cooling the hot air exhausted from the air outlet.

Optionally, the heat exchanger further comprises a controller, and the controller is in communication connection with the heat exchange assembly and the fan.

Optionally, the heat exchange water path comprises a composite coil pipe, and a circulating cooling water path is formed in the composite coil pipe;

the refrigeration path comprises a condenser, a fluorine-cooled evaporator, a compressor and a throttling device; the water outlet pipe of the condenser is connected with the water inlet of the composite coil pipe, and the water inlet pipe of the condenser is connected with the water outlet of the composite coil pipe; the gas vent of compressor with the intake-tube connection of condenser, the outlet duct of condenser with throttling arrangement connects, throttling arrangement's drain pipe with the feed liquor union coupling of the cold evaporimeter of fluorine, the outlet duct of the cold evaporimeter of fluorine with the induction port of compressor is connected to form the circulative cooling fluorine way.

Optionally, when the temperature of the cooling water inlet of the heat exchange water path is not greater than 22 ℃, the heat exchange water path, that is, the composite coil pipe can independently meet the temperature requirement of the air inlet of the server installation space; when the cooling water inlet temperature of the heat exchange water path is greater than 22 ℃ and not more than 35 ℃, the heat exchange water path (the composite coil pipe) performs primary heat extraction on hot air, and then the refrigeration path performs secondary refrigeration on the hot air subjected to the primary heat extraction, so that a full-time natural cold heat exchange mode is realized. The composite coil in the heat exchange water channel can be independently and naturally cooled in the water channel, can perform primary heat removal in the fluorine channel, and has a composite cooling function.

Optionally, a water outlet pipe of the condenser is provided with a return water temperature sensor; the air return inlet is provided with an air return temperature sensor; the air supply outlet is provided with an air supply temperature sensor; an exhaust pressure sensor and an outlet temperature sensor are arranged at an exhaust port of the compressor; the air suction port of the compressor is provided with an air suction pressure sensor and an inlet temperature sensor;

the return water temperature sensor, the return air temperature sensor, the air supply temperature sensor, the exhaust pressure sensor, the inlet temperature sensor, the outlet temperature sensor and the suction pressure sensor are all in communication connection with the controller.

Optionally, the fan is a centrifugal fan; the centrifugal fan is installed on the air supply outlet through a fan installation assembly.

Optionally, a cooling cavity is formed between the air return inlet and the air supply outlet at an interval, and the heat exchange assembly is arranged in the cooling cavity; the air return inlet and the air supply outlet are communicated with the cooling cavity.

Optionally, a high-temperature protection window is further arranged on the directional cooling machine cabinet, an electric window opener is configured on the high-temperature protection window, and the electric window opener is in communication connection with the controller;

when the return air temperature of the return air inlet is higher than a set value or the fan fails, the controller controls the electric window opener to open the high-temperature protection window.

Optionally, at least two integrated cabinet-level air conditioners are connected in parallel to the open type cold channel to form a shared cold pool and realize cold quantity sharing.

Optionally, the distributed air processing unit of any one of the integrated cabinet-level air conditioners has 20% of cold energy backup so as to perform cold energy compensation for a failed air conditioning unit.

Compared with the prior art, the invention has the following technical effects:

the full-time natural cooling integrated cabinet-level air conditioner provided by the invention uses an integrated air conditioner structure, reduces a plurality of links in the centralized refrigeration process, simplifies a refrigeration system and reduces the comprehensive cost; the distributed air processing unit is arranged below the directional cooling cabinet (namely below the server), so that the influence of water leakage on the safety of the server can be effectively avoided; the open type cold channel forms a shared cold pool, cold quantity sharing of adjacent cabinets can be realized, output can be increased when adjacent units break down, cold quantity of the cold pool can be guaranteed, and usability of a tail-end air conditioner is further increased; the closed type same-course hot air duct of the directional cooling cabinet is connected with the air return opening, so that the heat extraction is realized nearby, the heat island effect can be effectively overcome, the consistency of the air supply temperature is ensured, the power consumption of the fan is effectively reduced through the frequency conversion adjustment of the fan, the air return temperature can still be stably controlled within a target range when the load is changed within a large range, and the heat extraction efficiency is greatly improved; meanwhile, the reliability and the availability of the whole air conditioning system are improved on the basis of the principle that the simpler system is and the more reliable the system runs; this integration cabinet level air conditioner uses earlier heat extraction back refrigeration structure, according to server 25 ℃ air inlet, 37 ℃ air exhaust demand, only use heat transfer water route heat transfer can satisfy server air inlet temperature demand when cooling water inlet temperature is less than or equal to 22 ℃, and the heat transfer water route carries out the heat extraction earlier to hot-blast when cooling water inlet temperature > 22 ℃ and is less than or equal to 35 ℃, wind after the one-level heat extraction carries out the second grade refrigeration via the refrigeration route again, realize the cold air conditioner structure of nature in full time, air conditioning refrigeration efficiency promotes by a wide margin, distributed refrigeration mode among the distributed air treatment unit makes the application scope of integration cabinet level air conditioner expand to several cabinets to thousands of cabinets all can realize lower PUE.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic overall structure diagram of a full-time natural cooling integrated cabinet-level air conditioner disclosed in an embodiment of the present invention;

FIG. 2 is a schematic diagram of a main structure of a directional cooling cabinet according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a distributed air handling unit according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a distributed air handling unit control acquisition as disclosed in an embodiment of the present invention.

Wherein the reference numerals are:

101-directional cooling cabinet, 103-distributed air processing unit, 105-closed same-process hot channel, 107-return air inlet, 109-air supply outlet, 111-open cold channel, 201-high temperature protection window, 203-server installation space, 301-condenser, 303-composite coil, 305-fluorine cold evaporator, 307-compressor, 309-fan, 311-fan installation component, 313-cabinet body, 315-controller, 317-throttling device, 401-return water temperature sensor, 403-return air temperature sensor, 405-air supply temperature sensor, 407-exhaust pressure sensor, 409-suction pressure sensor, 411-outlet temperature sensor and 413-inlet temperature sensor.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

One of the purposes of the invention is to provide an all-time natural cooling integrated cabinet-level air conditioner which has a simple and reasonable structure, high operation reliability and greatly improved refrigeration efficiency, and the problem of influence of water leakage on the safety of a server can be effectively solved by arranging a distributed air processing unit below the server.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Example one

As shown in fig. 1 to 4, the present embodiment provides an integrated cabinet-level air conditioner with full-time natural cooling, which is specifically a structure of a cabinet-type air conditioner with a bottom installed therein, and mainly includes a distributed air processing unit 103 and a directional cooling cabinet 101 installed above the distributed air processing unit 103. The directional cooling cabinet 101 comprises a closed same-process hot channel 105 and a server installation space 203, wherein an air outlet is arranged on one side of the server installation space 203, and an air inlet is arranged on the other side of the server installation space 203. The distributed air processing unit 103 comprises a cabinet body 313, an air return port 107 and an air supply port 109 are arranged on the cabinet body 313, a heat exchange assembly is arranged in the cabinet body 313, and the heat exchange assembly is positioned on a path of air flow from the air return port 107 to the air supply port 109; an air outlet of the server installation space 203 is communicated with an air return inlet 107 through a closed same-course hot channel 105, an air supply outlet 109 is communicated with an air inlet of the server installation space 203 through an open type cold channel 111, and the open type cold channel 111 is a refrigerating space of the integrated cabinet-level air conditioner and can also be understood as a space outside the integrated cabinet-level air conditioner; the distributed air processing unit 103 further comprises a fan 309 for providing power for airflow organization, and the fan 309 can enable hot air (mainly exhausted by the server) exhausted from an air outlet of the server installation space 203 to sequentially pass through the closed same-path heat channel 105 and the air return opening 107, then exchange heat with the heat exchange assembly, and send cold air formed after heat exchange to the air supply opening 109. According to the requirements of 25 ℃ air inlet and 37 ℃ air outlet of the server, the heat exchange assembly comprises a heat exchange water path and a refrigeration path, and when the temperature of a cooling water inlet of the heat exchange water path is not more than 22 ℃, the heat exchange water path can independently meet the temperature requirement of an air inlet of a server installation space; when the temperature of a cooling water inlet of the heat exchange water path is higher than 22 ℃ and not higher than 35 ℃, the heat exchange water path performs primary heat extraction on hot air, and then the refrigeration path performs secondary refrigeration on the hot air subjected to the primary heat extraction, so that a full-time natural cold heat exchange mode is realized.

The same process in the closed same-process heat channel means that the wind paths of the servers arranged at the bottom and the servers arranged at the top are consistent as much as possible through the structural design, namely air is fed first and then returned, and air is fed last after air is fed.

In this embodiment, as shown in fig. 1 and 3, the heat exchanger further includes a controller 315, and the controller 315 is connected to the heat exchanging assembly and the fan 309 in a communication manner. The controller 315 may be mounted outside of the cabinet body 313.

In this embodiment, as shown in fig. 3, the heat exchange water path includes a condenser 301 and a composite coil 303, a water inlet of the composite coil 303 is connected to a water outlet pipe of the condenser 301, and a water outlet of the composite coil 303 is connected to a water inlet pipe of the condenser 301 to form a circulating cooling water path; the refrigeration path comprises a fluorine cooling evaporator 305, a compressor 307 and a throttling device 317, wherein an exhaust port of the compressor 307 is connected with an air inlet pipe of the condenser 301, an air outlet pipe of the condenser 301 is connected with the throttling device 317, an outlet pipe of the throttling device 317 is connected with an air inlet pipe of the fluorine cooling evaporator 305, and an air outlet pipe of the fluorine cooling evaporator 305 is connected with an air inlet port of the compressor 307, so that a circulating cooling fluorine path is formed.

In this embodiment, as shown in fig. 4, a water inlet pipe of the condenser 301 is provided with a return water temperature sensor 401; the return air inlet 107 is provided with a return air temperature sensor 403; the air supply outlet 109 is provided with an air supply temperature sensor 405; the discharge port of the compressor 307 is provided with a discharge pressure sensor 407 and an outlet temperature sensor 411; a suction port of the compressor 307 is provided with a suction pressure sensor 409 and an inlet temperature sensor 413; the return water temperature sensor 401, the return air temperature sensor 403, the supply air temperature sensor 405, the discharge pressure sensor 407, the suction pressure sensor 409, the outlet temperature sensor 411 and the inlet temperature sensor 413 are all in communication connection with the controller 315.

In this embodiment, the controller 315 can realize intelligent (intelligent) operation of the air conditioning system by controlling the start/stop and rotation speed of the compressor 307, the start/stop and frequency modulation of the fan 309, and the like.

In this embodiment, the fan 309 is preferably a centrifugal fan; the centrifugal fan is mounted to the supply port 109 via a fan mounting assembly 311. Fan installation component 311 can be installed parts such as sheet metal construction, installation piece, support, its accessible screw and cabinet body 313 fixed connection.

In this embodiment, a cooling cavity is formed between the air return port 107 and the air supply port 109 at intervals through a sealing member, and the heat exchange assembly is disposed in the cooling cavity; the return air inlet 107 and the supply air outlet 109 are both in communication with the cooling chamber. The sealing element can be a partition plate, and the edge of the partition plate is in sealing butt joint with the inner wall of the cabinet body 313 of the cabinet through a sealing strip; the air return inlet 107 and the air supply outlet 109 can be respectively communicated with the heat exchange space in the cooling cavity through pipelines.

In this embodiment, as shown in fig. 2, a high-temperature protection window 201 is further disposed on the directional cooling cabinet 101, and an electric window opener is configured on the high-temperature protection window 201 and is in communication connection with the controller 315; when the return air temperature of the return air inlet 107 is higher than a set value or the fan 309 fails, the electric window opener can automatically bounce the high-temperature protection window 201. The electric window opener can be an existing tooth type window opener, a scissors window opener and the like, and details are not repeated. Meanwhile, the electric window opener can also be replaced by an electronic door opener and an electromagnetic switch structure, such as a magnetic switch or a magnetic induction switch, and the specific installation mode and the working principle are the prior art and are not described herein again.

In this embodiment, at least two integrated cabinet-level air conditioners are connected in parallel to the open-type cold channel 111 to form a shared cold pool and realize cold sharing. The "open" in the open cold aisle 111 is relatively closed, there is no mesh door, etc., the wind resistance is minimized, and actually the open cold aisle 111 (outside space) and the low-temperature air inlet of the server belong to a term, and actually are both a space environment. That is, multiple sets of integrated cabinet-level air conditioners can be installed in the same room (space environment), and at this time, the internal space of the room is the open type cold channel 111 (shared cold pool). The distributed air processing units 103 of any one-to-one cabinet-level air conditioner have 20% of cold quantity backup to compensate the cold quantity of the fault air conditioning unit, and the cold quantity in the open type cold channel 111 (shared cold pool) is kept in dynamic balance and is basically in a numerical value.

The operation of the present embodiment will be described in detail below.

In this embodiment, the directional cooling cabinet 101 is an optimized and customized server cabinet, and the distributed air processing unit 103 is installed under the directional cooling cabinet 101 through screw connection, and forms an integrated cabinet-level air conditioner with the directional cooling cabinet 101. According to the integrated cabinet-level air conditioner, hot air exhausted by a server passes through an optimally designed closed same-course hot channel 105, then exchanges heat with a composite coil 303 and a fluorine cold evaporator 305 through an air return opening 107 of a distributed air processing unit 103, and sends out cold air, the cold air is directly communicated with a low-temperature air inlet of the server through an open cold channel 111, the open cold channel 111 forms a shared cold pool, and cold energy of adjacent cabinets is shared. This integration cabinet level air conditioner uses heat extraction earlier refrigeration structure, according to server 25 ℃ air inlet, 37 ℃ air exhaust demand, only use compound coil pipe 303 heat transfer can satisfy server air inlet temperature demand when cooling water inlet temperature is less than or equal to 22 ℃, and compound coil pipe 303 carries out the heat extraction earlier to hot-blast when cooling water inlet temperature > 22 ℃ and is less than or equal to 35 ℃, the wind after the one-level heat extraction carries out the second grade via fluorine cold evaporator 305 again, realize the cold air conditioner structure of nature all the time. According to recent meteorological data in China, taking the Guangdong with hotter weather as an example, the temperature of a wet bulb is not higher than 32 ℃ when the temperature is the highest, so that the temperature of a cooling water inlet is not higher than 35 ℃, and therefore the integrated cabinet-level air conditioner can achieve 100% natural cooling utilization rate, the refrigeration efficiency of the air conditioner is greatly improved, and the energy consumption of the air conditioner is greatly reduced compared with that of the prior art.

In the integrated cabinet-level air conditioning structure of the embodiment, the maximum single-cabinet heat density can reach 12 kW; the heat source is closed for refrigeration, a cold quantity conveying link and a fluorine water heat exchange link are reduced, the logarithmic heat exchange temperature difference is reduced through the optimized design of the composite coil pipe 303 and the fluorine cold evaporator 305 under the condition that the inlet temperature of the server is 25 ℃, the evaporation temperature can be increased to 22 ℃, meanwhile, the compressor with the matched internal volume ratio is selected in combination with the working range of the compressor 307, the compressor is automatically started and stopped, the rotating speed is adjusted, and the mechanical efficiency is greatly improved. Through the optimized design of an air conditioning air course and an air duct, a return air channel of a cabinet is combined and sealed with a server cabinet, namely a sealed same-course heat channel 105, through the frequency conversion adjustment of a fan 309, the power consumption of the fan 309 is effectively reduced, and when the load is changed in a large range, the return air temperature can still be stably controlled in a target range, so that the heat extraction efficiency is greatly improved; and the design of the closed same-process heat channel 105 not only can effectively overcome the heat island effect, but also is one of measures for ensuring the consistency of the air supply temperature. The integrated air-conditioning structure is used, so that a plurality of links in the centralized refrigeration process are reduced, the refrigeration system is simplified, and the comprehensive cost is reduced.

In this embodiment, each distributed air processing unit 103 may have a 20% backup of the cold capacity, and the other one of the corresponding distributed control and controller forms a group awareness, so that the output may be increased to ensure the cold capacity of the cold pool when the adjacent unit fails, further increasing the availability of the terminal air conditioner.

Therefore, the all-time natural cooling integrated cabinet-level air conditioner provided by the application document has the following beneficial effects:

1. the refrigeration efficiency is high: the cooling is carried out close to a heat source, the exhaust temperature of a server can reach 37 ℃, the ultra-short wind range can reduce the power consumption of the fan by measures of automatically adjusting the rotating speed of a centrifugal fan according to IT load in a cabinet and the like; based on cabinet-level refrigeration, the inlet air temperature of the server can reach 25 ℃, the structural design of the evaporator is optimized, the logarithmic heat exchange temperature difference is reduced, the heat emission temperature can be increased to 22 ℃, the compressor with matched internal volume ratio is selected according to the actual operation condition of the compressor, and the mechanical efficiency is greatly improved; the structure of exhausting heat first and then refrigerating is used, and when the temperature of a cooling water inlet is less than or equal to 35 ℃, the utilization rate of a natural cold source reaches 100 percent; the design of closed same-process heat channel can effectively overcome heat island effect, and through the frequency conversion regulation to centrifugal fan and compressor, not only can the uniformity of stable control air supply temperature and return air temperature, can promote heat extraction efficiency moreover by a wide margin.

2. The system safety guarantee is high: cabinet-level refrigeration, wherein 20% of surplus is backed up by single refrigeration capacity; the closed same-process hot channel shares the cold pool, and the single fault adjacent unit compensates; the structure is simple, and the number of fault points is small; the directional cooling cabinet is provided with a high-temperature protection window, when the return air temperature is higher than a set value or a fan fails, the high-temperature protection window automatically bounces open, and the single failed cabinet is in cold and hot communication, so that the temperature required by normal operation of a server can be guaranteed; the air conditioner is arranged at the bottom, and the influence of water leakage below the air conditioner on the safety coefficient of the server is small. The 'cold quantity backup' refers to cold quantity redundancy, namely the server radiates heat by 10kW, so that the rated refrigerating capacity of the air conditioner can reach 12 kW; the shared cold pool is that if a plurality of integrated air conditioners are installed together, the cold energy of the integrated air conditioners is discharged in an open cold channel, namely the cold pool, and when one air conditioner fails, the other air conditioners can increase the cooling capacity to compensate for a server in the failed air conditioner; compensation is typically for multiple air conditioners, as items that typically use only one server rack are also not available.

3. The comprehensive cost is low: the compressor is arranged in the integrated cabinet-level air conditioner, so that the refrigeration of a nearby heat source is realized, the hot air of the server directly exchanges heat with the fluorine-cooled evaporator, a cold quantity conveying link and a water-fluorine heat exchange link in the centralized refrigeration air conditioner are reduced, the whole refrigeration system is simplified, and the comprehensive manufacturing cost of the refrigeration system is reduced.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.