CN113825362A - Heat exchange system, communication cabinet and heat exchange method - Google Patents

Abstract

The application relates to a heat exchange system, a communication cabinet and a heat exchange method, wherein the heat exchange system comprises a cabinet body and a rack type heat exchanger, a cabinet air channel and a wind guide piece are arranged in the cabinet body, the cabinet air channel comprises a cold air area, a hot air area and an air inlet cold pool area, the rack type heat exchanger is arranged at the bottom of the cabinet body, the rack type heat exchanger is provided with an internal circulation channel and an external circulation channel, the internal circulation channel is communicated with the cabinet air channel, and the external circulation channel is isolated from the cabinet air channel. The heat exchange system of this application, whole heat exchange system form an independent inclosed circulation system, make cabinet body wind channel divide into cold wind district, hot-blast district and air inlet cooling pond district, and the at utmost has solved the cold and hot wind of the internal portion of cabinet and has mixed, and the focus is concentrated and heat island effect problem, has avoided the extravagant phenomenon of hot-air phase mixing phenomenon and heat leakage, has solved the air current and has managed a difficult problem.

Description

Heat exchange system, communication cabinet and heat exchange method

Technical Field

The application belongs to the technical field of communication, and particularly relates to a heat exchange system, a communication cabinet and a heat exchange method.

Background

With the development and progress of communication technology, the market of 5G and edge computing is promoted, the network broadband market and the service volume are continuously increased, the power consumption capacity of equipment is exponentially increased, and the power consumption cost is also exponentially increased; huge energy consumption and cost pressure are paid important attention by various operators and even the whole society, and energy conservation and consumption reduction are needed to be carried out through a new technical mode.

At present, energy conservation and emission reduction become global common missions, and when various industries actively put into carbon neutralization target practice, for the communication industry, energy conservation, consumption reduction and carbon emission reduction are a great challenge for realizing high-quality development of the industry, and are fields needing continuous exploration and breakthrough.

The refrigeration system is one of the largest energy consumption systems in communication equipment, and the communication equipment in the traditional communication cabinet mainly has three refrigeration modes, namely an air conditioner, a heat exchanger and a fan direct ventilation mode. From the energy-saving aspect, the air conditioner consumes most power, the heat exchanger is centered, and the straight ventilation saves most power. From a maintainability point of view, the heat exchanger is best maintained, the air conditioner is centered, and the straight ventilation is most complicated. From the reliability point of view, the heat exchanger reliability is the best, the air conditioner is centered, and the straight ventilation is the worst. From the cost point of view, straight ventilation is the lowest, the heat exchanger is centered, and the air conditioner is the highest.

Heat exchangers are devices used to transfer heat from a hot fluid to a cold fluid to meet specified process requirements, and are an industrial application of convective and conductive heat transfer. With the aim of carbon neutralization, the heat exchanger gradually replaces air conditioners and straight ventilation by virtue of the optimal comprehensive performance to become the most mainstream refrigeration mode on a communication base station. With the exponential increase of the power consumption of communication equipment, the requirements on the heat exchange capacity and the light weight of the heat exchanger are higher and higher, and new design modes and heat exchange modes are needed to meet the future development requirements.

The main stream communication base station equipment has the front air inlet and the rear air outlet or the side air inlet and the side air outlet (the left air inlet and the right air outlet or the right air inlet and the left air outlet), in a standard 19-inch rack, the communication base station equipment with the front air inlet and the rear air outlet can be directly installed and used to absorb cold air from a cold area at the front end of the rack, and then the hot air is discharged to the rear part of the rack. However, for the communication base station equipment with side air intake and side air exhaust, cold air cannot be directly sucked from the front end of the rack for heat dissipation, and the cold air needs to be guided to the side air inlet of the communication base station equipment from the cold area at the front end of the rack by means of an air guide design.

At present, in a traditional communication base station, a door-embedded type is generally used for installing a heat exchanger, namely the heat exchanger is hung on a cabinet door or a side wall. The heat exchange core body of the heat exchanger adopts a dividing wall type heat exchange core body, and is mainly divided into two independent airflow channels through the cross occlusion and the frame structure of aluminum alloy plates, and when indoor exhaust and outdoor fresh air respectively reversely flow through the heat exchange core body through forced convection of a fan, because the temperature difference exists between the airflows on the two sides of the aluminum alloy plates, the two airflows show a heat transfer phenomenon when passing through the dividing plates, and heat exchange is caused. The heat exchanger is arranged on the rack, cold air cannot be directly absorbed from the front end of the rack for heat dissipation, the cold air needs to be guided to an air inlet on the side surface of the equipment from a cold area at the front end of the rack by means of air guide design, and the air guide is mainly carried out through an air guide piece arranged below the equipment at present.

The existing heat exchanger has the following problems:

(1) the load bearing of cabinet door or lateral wall is limited, and along with heat exchanger heat transfer ability requirement is higher and higher, weight is also heavier and heavier, and the installation demand of high-power heat exchanger can not be satisfied in the mounting means of embedded door formula.

(2) The air flow organization of the embedded door type heat exchanger inside the cabinet is generally upper hot air, lower cold air and the air inlet and the air outlet are on the same surface, so that when the cabinet air flow organization is designed, the cold and heat isolation is difficult, the phenomenon of mixing such as cross air and turbulent flow is easily caused, and the hot spot concentration and the heat island effect are easily caused.

(3) The heat exchanger exchanges heat by means of cold and hot air exchange circulation inside and outside, and the cold air outlet design of the general internal circulation is about 10 ℃ higher than the ambient temperature, so that the application condition is limited, and the heat exchanger cannot be used in regions with severe high-temperature climate.

(4) The dividing wall type heat exchange core body mainly depends on the conduction and the convection heat exchange of the wall surface of a pure aluminum alloy plate, the wall surface of the aluminum alloy plate is flat, and the heat dissipation area under unit volume and weight is limited, so that the heat exchange capability of the heat exchange core body is difficult to improve.

(5) The dividing wall type heat exchange core body mainly depends on the conduction and the convection heat exchange of the wall surface of a pure aluminum alloy flat plate, the wall surface of the aluminum alloy flat plate is flat, the turbulent flow of air in the heat exchange core body is limited, the heat exchange is insufficient, and the heat exchange capability of the heat exchange core body is difficult to improve.

(6) The traditional air guide piece has no diversion design, and when the communication equipment sucks air, the air guide piece has no diversion and shunting structures, so that local air speed is too fast or insufficient, and air distribution is uneven.

(7) The traditional air guide piece is not in a heat insulation design, when the communication equipment works, the surface shell of the air guide piece is in a high-temperature state, the air guide piece is arranged on the upper portion or the lower portion of the communication equipment to conduct phase change air guide, cold air is sucked from the front, and when the cold air changes phase, the air guide piece is mixed with high temperature generated by the shell of the communication equipment, so that the temperature of cold air supply is increased, and the energy-saving performance of an air supply system is influenced by hot and cold mixing.

Disclosure of Invention

The technical problem that this application will solve is: aiming at the problems that the existing embedded door type heat exchanger is easy to generate hot spot concentration and heat island effect, a heat exchange system, a communication cabinet and a heat exchange method are provided.

In order to solve the technical problems, on one hand, the embodiment of the application provides a heat exchange system which comprises a cabinet body and a rack type heat exchanger, wherein a cabinet air duct and a wind guide member are arranged in the cabinet body, the cabinet air duct comprises a cold air area, a hot air area and an air inlet cold pool area, the rack type heat exchanger is provided with an inner circulation channel and an outer circulation channel, the inner circulation channel is communicated with the cabinet air duct, and the outer circulation channel is isolated from the cabinet air duct;

the cold air area is positioned on a first side of the communication equipment arranged in the cabinet body, and the air inlet cold pool area is positioned on a second side of the communication equipment adjacent to the first side and communicated with an inlet of an internal heat exchange air channel of the communication equipment;

the hot air area is positioned on a third side opposite to the first side and a fourth side opposite to the second side of the communication equipment and is communicated with an outlet of an internal heat exchange air duct of the communication equipment;

the rack type heat exchanger is installed at the bottom of the cabinet body and below the communication equipment, the cold air area and the air inlet cold pool area are communicated through the air guide piece, and the cold air area and the air inlet cold pool area are both isolated from the hot air area.

Optionally, the cold air area, the hot air area and the air inlet cold pool area are formed by separating a partition plate and communication equipment.

Optionally, the internal heat exchange air duct of the communication device is a side-in side-out air duct, an inlet of the internal heat exchange air duct of the communication device is arranged at the second side of the communication device, and an outlet of the internal heat exchange air duct of the communication device is arranged at the third side of the communication device.

Optionally, the cabinet body includes a cabinet main body frame, a first cabinet door, a second cabinet door, a first side plate and a second side plate, the first cabinet door is installed on the first side of the cabinet main body frame, the first side plate is installed on the second side of the cabinet main body frame, the second cabinet door is installed on the third side of the cabinet main body frame, and the second side plate is installed on the fourth side of the cabinet main body frame;

the cold air area is positioned between the first cabinet door and the first side of the communication equipment, and the air inlet cold pool area is positioned between the first side plate and the second side of the communication equipment;

the hot air area comprises a first hot air area and a second hot air area which are communicated with each other, the first hot air area is located between the second cabinet door and the third side of the communication equipment, and the second hot air area is located between the second side plate and the fourth side of the communication equipment.

Optionally, the air guide piece comprises an upper cover, a lower cover and a heat insulation plate, the upper cover is fixed on the lower cover to form an air guide cavity between the upper cover and the lower cover, an air guide inlet is formed in one side of the lower cover facing the cold air area, an air guide outlet is formed in one side of the lower cover facing the air inlet cold pool area, and the air guide inlet, the air guide cavity and the air guide outlet are sequentially communicated to form an air guide channel;

the upper cover and the lower cover are fixedly attached with the heat insulation plates, and the upper cover and the lower cover are respectively contacted with two communication devices which are adjacent up and down.

Optionally, the air guide further comprises an air guide inclined plate arranged in the air guide cavity, and the air guide inclined plate is used for guiding cold air entering from the air guide inlet to the air guide outlet.

Optionally, the insulation board is a fiber vacuum board made of a fiber composite material;

the fiber vacuum panel comprises a fiber composite outer layer and a vacuum inner layer formed in the fiber composite outer layer through vacuum pumping.

Optionally, the thermal conductivity of the fibrous vacuum panel is 0.001 w/m.k.

Optionally, the communication devices are stacked up and down, and the air guide is interposed between two adjacent layers of communication devices.

Optionally, the rack-mounted heat exchanger includes a casing, an internal circulation fan, an external circulation fan, a heat exchange core, a spraying device and a controller, the internal circulation fan, the external circulation fan and the spraying device are respectively in signal connection with the controller, the heat exchange core is disposed in the casing, the internal circulation channel and the external circulation channel are formed in the heat exchange core, the internal circulation fan, the external circulation fan, the spraying device and the controller are mounted outside the casing, the internal circulation fan is disposed at an air outlet of the internal circulation channel, and the external circulation fan is disposed at an air outlet of the external circulation channel;

the internal circulation fan is used for air circulation of the cabinet air duct and the internal circulation channel, the external circulation fan brings external cold air into the external circulation channel to exchange heat with hot air in the internal circulation channel, and brings the air after heat exchange out of the external circulation channel;

when the heat exchange capacity of the rack-mounted heat exchanger is insufficient, the controller sends an instruction to start the spraying device, and water mist sprayed by the spraying device is brought into the external circulation channel by the external circulation fan.

Optionally, the heat exchange core body is a microwave fin core body, the microwave fin core body is formed by stacking and brazing a plurality of heat exchange plates, a plurality of inner circulation fins, a plurality of outer circulation fins, a plurality of guide fins and a plurality of sealing strips, and the inner circulation fins and the outer circulation fins are alternately arranged along the stacking direction;

each internal circulation fin is clamped between the two heat exchange plates to form an internal air flow channel, and all the internal air flow channels form the internal circulation channel; each outer circulation fin is clamped between the two heat exchange plates, the guide fins are arranged at two ends of each inner circulation fin to form an outer air flow channel, and all the outer air flow channels form the outer circulation channel;

and hot air in the cabinet air duct passes through the inner side airflow channel and performs recuperative heat exchange with cold air entering the outer side airflow channel from the outdoor environment through the heat exchange plate.

Optionally, the seals comprise inner and outer circulating seals;

the internal circulation sealing strips comprise internal circulation upper sealing strips, internal circulation lower sealing strips, internal circulation front sealing strips and internal circulation rear sealing strips, the internal circulation upper sealing strips cover the tops of the internal circulation fins, the internal circulation lower sealing strips cover the bottoms of the internal circulation fins and the bottoms of the guide fins, the internal circulation front sealing strips cover the front ends of the guide fins on the front side, and the internal circulation rear sealing strips cover the rear ends of the guide fins on the rear side;

the outer circulation sealing strips comprise outer circulation upper sealing strips and outer circulation lower sealing strips, the outer circulation upper sealing strips cover the tops of the outer circulation fins, and the outer circulation lower sealing strips cover the bottoms of the outer circulation fins.

Optionally, the casing comprises a front protection screen plate, an upper mounting piece, a shell, a pipeline mounting plate, a fan cover plate, an inner circulation fan mounting plate and an outer circulation fan mounting plate;

the upper mounting piece is fixed above the shell, the fan cover plate is fixed at the top of the front end of the upper mounting piece, the internal circulation fan is arranged in the fan cover plate, the internal circulation fan mounting plate is mounted on the fan cover plate and covers the internal circulation fan, an internal circulation fan net is arranged on the internal circulation fan mounting plate, and an air outlet of the internal circulation channel faces the internal circulation fan;

the outer circulation fan is arranged on the outer circulation fan mounting plate, an outer circulation fan net is arranged on the outer circulation fan mounting plate, and an air outlet of the outer circulation channel faces the outer circulation fan.

Optionally, the spraying device comprises a pipeline and an automatic atomizing nozzle connected to the pipeline, wherein the pipeline is connected with a water pipeline or a water tank outside the cabinet body; when the heat exchange capacity of the rack-mounted heat exchanger is insufficient, the controller sends a command to open the automatic atomizing nozzle, water in the pipeline enters the automatic atomizing nozzle through pressurization and is sprayed out in a mist shape, and water mist sprayed out by the automatic atomizing nozzle is brought into the outer circulation channel by the outer circulation fan;

rack-mounted heat exchanger still includes pipeline mounting panel and waterproof strip, the pipe mounting is in the bottom of pipeline mounting panel, be provided with the opening on the casing, the pipeline mounting panel is installed on the casing and cover the opening, waterproof strip compresses tightly the assembly and is in between pipeline mounting panel and the casing, automatic atomizing nozzle passes through the opening stretches into space between extrinsic cycle fan and the heat transfer core.

According to the heat exchange system of this application, cabinet internal rack wind channel and the air guide that is provided with, the rack wind channel is including cold wind district, hot-blast district and the cold pond district of air inlet, rack-mounted heat exchanger has inner circulation channel and extrinsic cycle passageway, inner circulation channel and rack wind channel intercommunication, extrinsic cycle passageway is isolated with the rack wind channel, rack-mounted heat exchanger installs in the bottom of the cabinet body and is in communication equipment's below, cold wind district and air inlet cold pond district are through the air guide intercommunication, both all separate with hot-blast district in cold wind district and the cold pond district of air inlet. Compared with the prior heat exchange system, the heat exchange system has the following advantages:

(1) the rack-mounted heat exchanger is arranged at the bottom of the cabinet body and below the communication equipment, so that the load bearing of a cabinet door or a side wall is not needed, and the mounting requirement of the high-power heat exchanger can be met by a rack-mounted mounting mode.

(2) The whole heat exchange system forms an independent closed circulation system, so that the air channel of the cabinet body is divided into a cold air area, a hot air area and an air inlet cold pool area, the problems of hot and cold air mixing, hot spot concentration and heat island effect in the cabinet body are solved to the maximum extent, the hot air mixing phenomenon and the heat leakage waste phenomenon are avoided, and the air flow management problem is solved.

(3) The integrated design of the rack type heat exchanger and the cold and hot air return mode enable the cabinet air duct to be easier to realize an independent closed circulation system, and the cold and hot isolation is easier to realize.

(4) The newly-added spraying device of the rack-type heat exchanger is characterized in that the controller sends an instruction to start the spraying device when the heat exchange capacity of the rack-type heat exchanger is insufficient, and water mist sprayed by the spraying device is brought into an external circulation channel by an external circulation fan, so that the heat exchange capacity of the rack-type heat exchanger is improved, temporary super-heat load and high-temperature extreme climate are effectively responded, and the scene application range of the heat exchange system is wider. For example, the heat exchange system of the application can be applied to a communication base station or a machine room integrated cabinet, and can also be applied to the interior of other integrated equipment with the heat exchange system.

(5) In the heat exchanger, the mode of enhancing heat exchange is to increase the area, reduce the thermal boundary layer and increase the fluid disturbance. Under the same volume, the heat exchange area of the brazing microwave fin core body adopted by the heat exchanger is larger than that of the traditional heat exchanger in unit volume; when air is blown to the micro-corrugated fins of the core body of the brazed microwave fin, the turbulent flow of the air in the core body of the brazed microwave fin is much larger than that of the heat exchange core body of the traditional heat exchanger, so that the area is increased, and the fluid disturbance and the cutting of the fluid boundary layer of the heat exchange surface are increased.

(6) The cold air area and the air inlet cold pool area are communicated through the air guide piece, and the air guide piece is designed in a flow guide mode, so that when the communication equipment sucks air, the air guide piece conducts flow guide and flow division, and air speed and air quantity are distributed to the air inlet of the communication equipment in a balanced mode.

(7) The upper cover and the lower cover of the air guide piece are respectively fixedly attached with a heat insulation plate, the upper cover and the lower cover are respectively contacted with two communication devices which are adjacent from top to bottom, the heat insulation plates adopt fiber vacuum plates, each fiber vacuum plate comprises a fiber composite material outer layer and a vacuum inner layer formed in the fiber composite material outer layer through vacuumizing, and the heat conductivity of the fiber vacuum plates is as low as 0.001 w/m.k. Therefore, the air guide piece and the surface of the communication equipment have good heat insulation effect, and the heat of the shell of the communication equipment is prevented from being conducted through the air guide piece, and the heat and cold mixing influences the energy-saving performance of the air supply system.

On the other hand, the embodiment of the present application further provides a communication cabinet, which includes a communication device and the heat exchange system, where the communication device is installed in the cabinet body and located above the rack-type heat exchanger.

In another aspect, an embodiment of the present application further provides a heat exchange method, including:

after the frame type heat exchanger is started, the air inlet temperature and the air outlet temperature of the inner circulation channel and the outer circulation channel are collected in real time and reported to the controller;

the controller calculates the air volume demand according to the collected and reported data;

the controller calculates the rotating speeds of the inner circulating fan and the outer circulating fan in real time according to the air volume requirement, and transmits rotating speed control signals to the inner circulating fan and the outer circulating fan respectively so as to adjust the rotating speeds of the inner circulating fan and the outer circulating fan.

Optionally, the heat exchange method further comprises:

the controller calculates the temperature data and temperature difference data ratio of the air inlet and outlet of the inner circulation channel and the air inlet and outlet of the outer circulation channel, and compares the temperature data and temperature difference data ratio with a preset temperature and temperature difference ratio range to judge whether the heat exchange system achieves heat exchange balance;

if the judgment result is that the heat exchange system reaches heat exchange balance, the controller does not send a correction signal, and the internal circulation fan and the external circulation fan maintain the original rotating speed;

and if the judgment result shows that the heat exchange system does not reach the heat exchange balance, reversely calculating the correction data of the rotating speeds of the inner circulating fan and the outer circulating fan according to the range and the direction of the deviation, and sending correction signals to the inner circulating fan and the outer circulating fan.

Optionally, the heat exchange method further comprises:

if the heat exchange system still does not reach the heat exchange balance state after the preset cycle times and the fan is in the highest rotating speed state, the controller sends an instruction to start the spraying device, and the water mist sprayed by the spraying device is brought into the outer circulation channel by the outer circulation fan.

Optionally, the heat exchange method further comprises:

after the spraying device is started for a set time, the controller calculates the temperature data and the temperature difference data ratio of the air inlet and the air outlet of the inner circulation channel and the air inlet and the air outlet of the outer circulation channel again, and compares the temperature data and the temperature difference data ratio with the preset temperature and temperature difference range to judge whether the heat exchange system achieves heat exchange balance;

if the judgment result is that the heat exchange system achieves heat exchange balance, the maximum air supply and spray states are kept, and a fault alarm mode is displayed at the same time;

if the temperature is continuously reduced, the temperature is collected in real time to reach a preset temperature point and a preset time point, and the controller closes the spraying device.

Drawings

Fig. 1 is a perspective view of a telecommunications cabinet provided by an embodiment of the present application;

fig. 2 is a perspective view of a communication cabinet provided in an embodiment of the present application when two cabinet doors are opened;

fig. 3 is a front perspective view of a communication cabinet provided in an embodiment of the present application with two cabinet doors and two side plates removed;

fig. 4 is a rear perspective view of the communication cabinet provided in the embodiment of the present application with two cabinet doors and two side plates removed;

fig. 5 is a front view of a telecommunications cabinet provided by an embodiment of the present application;

FIG. 6 is a cross-sectional view taken along the line A-A in FIG. 5;

fig. 7 is an assembly view of an air guide and a communication device of a communication cabinet according to an embodiment of the present application;

fig. 8 is a schematic view of an air guide of a communication cabinet according to an embodiment of the present application;

fig. 9 is a schematic internal configuration diagram of an air guide of a communication cabinet according to an embodiment of the present application;

fig. 10 is an exploded view of a wind guide of a communication cabinet according to an embodiment of the present application;

FIG. 11 is a schematic cross-sectional view of a fiber vacuum panel of a telecommunications rack provided in accordance with an embodiment of the present application;

fig. 12 is a schematic view of a rack-mounted heat exchanger of a telecommunications cabinet according to an embodiment of the present application;

fig. 13 is an exploded view of a rack heat exchanger of a telecommunications cabinet according to an embodiment of the present application;

fig. 14 is a schematic view of a heat exchange core of a rack heat exchanger of a telecommunications cabinet according to an embodiment of the present application;

fig. 15 is an exploded view of a heat exchange core of a rack heat exchanger of a telecommunications cabinet according to an embodiment of the present application;

FIG. 16 is a schematic view of a spray apparatus of a rack heat exchanger of a telecommunications cabinet according to an embodiment of the present application;

fig. 17 is a flow chart of a heat exchange method according to an embodiment of the present application.

The reference numerals in the specification are as follows:

100. a heat exchange system; 200. a communication device;

1. a cabinet body; 11. a cold air area; 12. a hot air zone; 13. an air inlet cooling pool area; 14. a cabinet main body frame; 15. a first cabinet door; 16. a second cabinet door; 17. a first side plate; 18. a second side plate;

2. a rack-mounted heat exchanger; 21. a housing; 211. a casing hanger; 212. a front protective screen plate; 213. an upper mounting member; 214. A housing; 215. a pipe mounting plate; 216. a fan cover plate; 217. an internal circulation fan mounting plate; 2171. an internal circulation fan net; 218. an outer circulation fan mounting plate; 2181. an external circulation fan net; 22. an internal circulation fan; 23. an external circulation fan; 24. A heat exchange core body; 241. a heat exchange plate; 242. an internal circulation fin; 243. an outer circulation fin; 244. a guide fin; 245. an internal circulation seal; 2451. an inner circulation upper seal strip; 2452. an internal circulation lower seal; 2453. internal circulation rear seal; 2454. internal circulation rear seal; 246. an outer circulation seal; 2461. externally circulating and sealing the upper seal; 2462. an outer circulation lower seal; 25. a spraying device; 251. A pipeline; 2511. an outer conduit; 2512. an inner conduit; 252. an automatic atomizing nozzle; 26. a controller; 27. a pipe mounting plate; 28. a waterproof strip;

3. an air guide member; 31. an upper cover; 32. a lower cover; 33. a heat insulation plate; 331. an outer layer of fibrous composite material; 332. a vacuum inner layer; 34. a wind guide cavity; 35. an air guide inlet; 36. an air guide outlet; 37. an air guide sloping plate; 38. and the air guide piece is hung on the lug.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present application more clearly apparent, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

Referring to fig. 1 to 16, a communication cabinet provided in an embodiment of the present application includes a heat exchange system 100 and a communication device 200. The communication device 200 may be, for example, a communication master.

Hereinafter, please refer to the coordinate system of fig. 1 for the front, back, left, and right directions.

The heat exchange system 100 comprises a cabinet body 1 and a rack type heat exchanger 2, a cabinet air duct and an air guide member 3 are arranged in the cabinet body 1, the cabinet air duct comprises a cold air area 11, a hot air area 12 and an air inlet cold pool area 13, the rack type heat exchanger 1 is provided with an inner circulation channel and an outer circulation channel, the inner circulation channel is communicated with the cabinet air duct, and the outer circulation channel is isolated from the cabinet air duct. The cold air area 11 is located at a first side (front side) of the communication device 200 arranged in the cabinet 1, and the air intake and cooling pool area 13 is located at a second side (right side) of the communication device 200 adjacent to the first side and communicated with an inlet of an internal heat exchange air duct of the communication device 200. The hot wind zone 12 is located on a third side (rear side) opposite to the first side and a fourth side (left side) opposite to the second side of the communication device 200, and is communicated with an outlet of an internal heat exchange air duct of the communication device 200. The rack type heat exchanger 2 is installed at the bottom of the cabinet body 1 and below the communication equipment 200, the cold air area 11 and the air inlet cold pool area 13 are communicated through the air guide member 3, and the cold air area 11 and the air inlet cold pool area 13 are both isolated from the hot air area 12. The cold air area 11, the hot air area 12 and the air inlet and cooling pool area 13 are formed by separating a partition plate (or a partition plate and a blind plate) and the communication equipment 200. The cold air zone 11 and the hot air zone 12 are not connected with each other and are mixed.

The inside heat exchange air duct of the communication device 200 is a side-in side-out air duct, the inlet of the inside heat exchange air duct of the communication device 200 is arranged at the second side of the communication device 200, and the outlet of the inside heat exchange air duct of the communication device 200 is arranged at the third side of the communication device 200.

Referring to fig. 1 and 2, the cabinet body 1 includes a cabinet main body frame 14, a first cabinet door 15 (front cabinet door), a second cabinet door 16 (rear cabinet door), a first side plate 17 (right side plate), and a second side plate 18 (left side plate), the first cabinet door 15 is installed on a first side of the cabinet main body frame 14, the first side plate 17 is installed on a second side of the cabinet main body frame 14, the second cabinet door 16 is installed on a third side of the cabinet main body frame 14, and the second side plate 18 is installed on a fourth side of the cabinet main body frame 14; the cold air region 11 is located between the first cabinet door 15 and the first side of the communication device 200, and the air intake cooling pool region 13 is located between the first side plate 17 and the second side of the communication device 200; the hot wind zone 12 includes a first hot wind zone 121 and a second hot wind zone 122 which are communicated with each other, the first hot wind zone 121 is located between the second cabinet door 16 and the third side of the communication device 200, and the second hot wind zone 122 is located between the second side plate 18 and the fourth side of the communication device 200.

The cabinet body can be a 19-inch standard outdoor cabinet, and plays a role in installing communication equipment, a closed cold and hot air independent circulation heat exchange system is formed in the whole communication cabinet by using two side plates (a first side plate 17 and a second side plate 18) and front and rear cabinet doors (a first cabinet door 15 and a second cabinet door 16), an air channel of the cabinet is divided into a cold air area 11 at the front part, an air inlet cold pool area 13 positioned at an air inlet on the side surface of the communication equipment 200 and a hot air area 12 at the rest position by using a partition plate and heat insulation cotton in the cabinet body, the cold air area 11 is communicated with the air inlet cold pool area 13 through an air guide member 3, but is isolated from the hot air area 12; the cold air area 11 and the air inlet cold pool area 13 are used for reducing the space heat leakage of the cold area in the cabinet and reducing the waste of cold air supply; the cold air and the hot air in the air duct of the cabinet are separated, and the cold air and the hot air are separated from being mixed, so that the energy waste is reduced.

Referring to fig. 6, the working principle of the heat exchange system 100 is as follows:

when the heat exchange system is started 100, the communication device 200 is started, internal circulation cold air of the rack type heat exchanger 2 flows out to the cold air area 11 from the lower part of the cold area of the cabinet, an air channel of the communication device 200 flows out from the side, after the communication device 200 is started, air inlet pressure is generated at the air inlet position, the cold air in the cold air area 11 is changed to the air inlet cold pool area 13 on the side and the communication device 200 through the air guide piece 3, and after heat exchange is completed, hot air is discharged to the other side of the cabinet and the hot air area 13 at the rear part of the cabinet.

The internal circulation intake air of the rack-mounted heat exchanger 2 sucks hot air from the hot air area 13 and enters the rack-mounted heat exchanger 2. In the rack-type heat exchanger 2, heat absorbed by the internal circulation and cold air of the external circulation are conducted and convected, after heat exchange is completed by the rack-type heat exchanger 2, the temperature is reduced to be cold air when the air is exhausted by the internal circulation, and thus the whole heat exchange and the heat exchange circulation of the cabinet are completed.

Referring to fig. 7 to 10, the air guide member 3 includes an upper cover 31, a lower cover 32 and a heat insulation plate 33, the upper cover 31 is fixed on the lower cover 32 to form an air guide cavity 34 therebetween, one side of the lower cover 32 facing the cold air region 11 is provided with an air guide inlet 35, one side of the lower cover 32 facing the air intake-cooling pool region 13 is provided with an air guide outlet 36, and the air guide inlet 35, the air guide cavity 34 and the air guide outlet 36 are sequentially communicated to form an air guide channel; the upper cover 31 and the lower cover 32 are both fixedly attached with the heat insulation board 33, and the upper cover 31 and the lower cover 32 are respectively contacted with the two communication devices 200 which are adjacent up and down.

The air guide member 3 further comprises an air guide inclined plate 37 arranged in the air guide cavity 34, the air guide inclined plate 37 is clamped between the upper heat insulation plate 33 and the lower heat insulation plate 33, and the air guide inclined plate 37 is used for guiding cold air entering from the air guide inlet 35 to the air guide outlet 36. The air guide slant plate 37 may be provided in parallel. The air guide 3 further includes an air guide hanger 38 for attaching the air guide 3. The upper cover 31, the lower cover 32, the inclined air guide plate 37 and the air guide hanger 38 are made of low carbon steel material.

The inclined air guide plate 37 is obliquely arranged, the upper cover 31, the lower cover 32 and the inclined air guide plate 37 form an air guide cavity 34 with closed guide, when the heat exchange system 100 conducts air, the functions of isolation, flow guide and flow division are achieved, when cold air changes direction, the cold air in the cold air area 11 can be uniformly guided into the air cooling pool area 13 and an air inlet of the communication equipment 200, and the conditions that local air speed is too fast or insufficient and air distribution is uneven are avoided.

In one embodiment, the insulation panels 33 are fibrous vacuum panels made of a fibrous composite material having a thermal conductivity as low as 0.04w/m.k or less. Referring to fig. 11, the fiber vacuum panel includes a fiber composite outer layer 331 and a vacuum inner layer 332 formed inside the fiber composite outer layer 331 by vacuum-pumping. The thermal conductivity of the fiber vacuum panel was 0.001 w/m.k.

The fiber vacuum plate is attached to the upper cover 31 and the lower cover 32, and because the distance between the air guide 3 and the communication equipment 200 is small, if no heat insulation is arranged, the communication equipment can easily transmit heat into the air guide 3 through the carbon steel material of the upper cover 31 or the lower cover 32, and the heat is mixed with cold air of the air guide 3. After the fiber vacuum plate is adopted, the heat insulation treatment is effectively carried out.

Referring to fig. 3, a plurality of communication devices 200 are stacked up and down, and the air guide 3 is interposed between two adjacent layers of communication devices 200.

Referring to fig. 12 and 13, the rack-mounted heat exchanger 2 includes a casing 21, an internal circulation fan 22, an external circulation fan 23, a heat exchange core 24, a spraying device 25, and a controller 26, where the internal circulation fan 22, the external circulation fan 23, and the spraying device 25 are respectively in signal connection with the controller 26, the heat exchange core 24 is disposed in the casing 21, the internal circulation channel and the external circulation channel are formed in the heat exchange core 24, the internal circulation fan 22, the external circulation fan 23, the spraying device 25, and the controller 26 are mounted outside the casing 21, the internal circulation fan 22 is disposed at an air outlet of the internal circulation channel, and the external circulation fan 23 is disposed at an air outlet of the external circulation channel. The cabinet 21 serves to protect and mount various components. The chassis 21 is provided with a chassis hanger 211 for the rack-mount heat exchanger mounting 2.

The internal circulation fan 22 is used for air circulation of the cabinet air duct and the internal circulation channel, and the external circulation fan 23 brings external cold air into the external circulation channel to exchange heat with hot air in the internal circulation channel, and brings the air after heat exchange out of the external circulation channel. When the heat exchange capacity of the rack-type heat exchanger 2 is insufficient, the controller 26 sends a command to start the spraying device 25, and the water mist sprayed by the spraying device 25 is brought into the external circulation channel by the external circulation fan 23.

The internal circulation fan 22 may be provided in plurality, for example, three, side by side. The outer circulation fan 23 may be provided in plurality, for example, three, side by side.

Referring to fig. 14 and 15, the heat exchange core 24 is a microwave finned core made of an aluminum alloy material, and is formed by stacking and brazing a plurality of heat exchange plates 241, a plurality of inner circulation fins 242, a plurality of outer circulation fins 243, a plurality of guide fins 244 and a plurality of seals, wherein the inner circulation fins 242 and the outer circulation fins 243 are alternately arranged along the stacking direction; each of the inner circulation fins 242 is sandwiched between two of the heat exchange plates 241 to form an inner airflow channel, and all the inner airflow channels form the inner circulation channel; each outer circulation fin 243 is clamped between two heat exchange plates 241, the guide fins 244 are arranged at two ends of each inner circulation fin 243 to form an outer air flow passage, and all the outer air flow passages form the outer circulation passage; the hot air in the cabinet air duct passes through the inner airflow channel and performs recuperative heat exchange with the cold air entering the outer airflow channel from the outdoor environment through the heat exchange plate 241.

The seals include an inner circulating seal 245 and an outer circulating seal 246; the inner circulation seal 245 comprises an inner circulation upper seal 2451, an inner circulation lower seal 2452, an inner circulation rear seal 2453 and an inner circulation rear seal 2454, the inner circulation upper seal 2451 covers the top of the inner circulation fin 242, the inner circulation lower seal 2452 covers the bottom of the inner circulation fin 242 and the bottom of the guide fin 244, the inner circulation front seal 2453 covers the front end of the guide fin 244 on the front side, and the inner circulation rear seal 2454 covers the rear end of the guide fin 244 on the rear side. Thus, the air inlet of the internal air flow channel (internal circulation channel) is located at the rear side of the upper surface of the heat exchange core body 24 and faces upward, and the air outlet of the internal air flow channel (internal circulation channel) is located at the front side of the upper surface of the heat exchange core body 24 and faces upward.

The outer circulating seal 246 includes an outer circulating upper seal 2461 and an outer circulating lower seal 2462, the outer circulating upper seal 2461 overlying the top of the outer circulating fin 243, the outer circulating lower seal 2462 overlying the bottom of the outer circulating fin 243. Thus, the air inlet of the outer air flow passage (outer circulation passage) is located on the front side of the heat exchange core 24 and faces forward, and the air outlet of the outer air flow passage (outer circulation passage) is located on the rear side of the heat exchange core 24 and faces rearward.

Referring to fig. 12 and 13, the casing 21 includes a front shielding mesh plate 212, an upper mounting member 213, a housing 214, a duct mounting plate 215, a fan cover plate 216, an inner circulation fan mounting plate 217, and an outer circulation fan mounting plate 218; the upper mounting part 213 is fixed above the housing 214, the fan cover plate 216 is fixed on the top of the front end of the upper mounting part 213, the internal circulation fan 22 is arranged in the fan cover plate 216, the internal circulation fan mounting plate 217 is mounted on the fan cover plate 216 and covers the internal circulation fan 22, an internal circulation fan mesh 2171 is arranged on the internal circulation fan mounting plate 217, and the air outlet of the internal circulation channel faces the internal circulation fan 22; the external circulation fan 23 is installed on the external circulation fan installation plate 218, the external circulation fan installation plate 218 is provided with an external circulation fan net 2181, and an air outlet of the external circulation passage faces the external circulation fan 23.

Referring to fig. 12, 13 and 16, the spraying device 25 comprises a pipe 251 and an automatic atomizing nozzle 252 connected to the pipe 251, wherein the pipe 251 is connected with a water pipeline or a water tank outside the cabinet 1; when the heat exchange capacity of the rack-type heat exchanger 2 is insufficient, the controller 26 sends an instruction to open the automatic atomizing nozzle 252, the water in the pipeline 251 enters the automatic atomizing nozzle 252 through pressurization and is sprayed out in a mist shape, and the water mist sprayed out by the automatic atomizing nozzle 252 is brought into the outer circulation channel by the outer circulation fan 23. Therefore, the heat exchange coefficient of the heat exchange core body 24 is increased, the heat exchange efficiency is higher, and the controller turns off the spraying device 25 after extreme high-temperature weather passes.

Referring to fig. 13, the rack-mounted heat exchanger 2 further includes a duct mounting plate 27 and a waterproof strip 28, the duct 251 is mounted at the bottom of the duct mounting plate 27, the casing 21 is provided with an opening, the duct mounting plate 27 is mounted on the casing 21 and covers the opening, the waterproof strip 28 is tightly fitted between the duct mounting plate 27 and the casing 21, and the automatic atomizing nozzle 252 extends into a gap between the external circulation fan 23 and the heat exchange core 24 through the opening.

The automatic atomizing nozzle 252 is provided in plural (3 shown in fig. 16), and the plural automatic atomizing nozzles 252 are arranged at equal intervals. Referring to fig. 16, the pipe 251 is L-shaped, and includes an outer pipe 2511 and an inner pipe 2512, and the automatic atomizing nozzle 252 is vertically connected to the inner pipe 2512.

According to the heat exchange system of this application, cabinet internal rack wind channel and the air guide that is provided with, the rack wind channel is including cold wind district, hot-blast district and the cold pond district of air inlet, rack-mounted heat exchanger has inner circulation channel and extrinsic cycle passageway, inner circulation channel and rack wind channel intercommunication, extrinsic cycle passageway is isolated with the rack wind channel, rack-mounted heat exchanger installs in the bottom of the cabinet body and is in communication equipment's below, cold wind district and air inlet cold pond district are through the air guide intercommunication, both all separate with hot-blast district in cold wind district and the cold pond district of air inlet. Compared with the prior heat exchange system, the heat exchange system has the following advantages:

(1) the rack-mounted heat exchanger is arranged at the bottom of the cabinet body and below the communication equipment, so that the load bearing of a cabinet door or a side wall is not needed, and the mounting requirement of the high-power heat exchanger can be met by a rack-mounted mounting mode.

(2) The whole heat exchange system forms an independent closed circulation system, so that the air channel of the cabinet body is divided into a cold air area, a hot air area and an air inlet cold pool area, the problems of hot and cold air mixing, hot spot concentration and heat island effect in the cabinet body are solved to the maximum extent, the hot air mixing phenomenon and the heat leakage waste phenomenon are avoided, and the air flow management problem is solved.

(3) The integrated design of the rack type heat exchanger and the cold and hot air return mode enable the cabinet air duct to be easier to realize an independent closed circulation system, and the cold and hot isolation is easier to realize.

(4) The newly-added spraying device of the rack-type heat exchanger is characterized in that the controller sends an instruction to start the spraying device when the heat exchange capacity of the rack-type heat exchanger is insufficient, and water mist sprayed by the spraying device is brought into an external circulation channel by an external circulation fan, so that the heat exchange capacity of the rack-type heat exchanger is improved, temporary super-heat load and high-temperature extreme climate are effectively responded, and the scene application range of the heat exchange system is wider. For example, the heat exchange system of the application can be applied to a communication base station or a machine room integrated cabinet, and can also be applied to the interior of other integrated equipment with the heat exchange system.

(5) In the heat exchanger, the mode of enhancing heat exchange is to increase the area, reduce the thermal boundary layer and increase the fluid disturbance. Under the same volume, the heat exchange area of the brazing microwave fin core body adopted by the heat exchanger is larger than that of the traditional heat exchanger in unit volume; when air is blown to the micro-corrugated fins of the core body of the brazed microwave fin, the turbulent flow of the air in the core body of the brazed microwave fin is much larger than that of the heat exchange core body of the traditional heat exchanger, so that the area is increased, and the fluid disturbance and the cutting of the fluid boundary layer of the heat exchange surface are increased.

(6) The cold air area and the air inlet cold pool area are communicated through the air guide piece, and the air guide piece is designed in a flow guide mode, so that when the communication equipment sucks air, the air guide piece conducts flow guide and flow division, and air speed and air quantity are distributed to the air inlet of the communication equipment in a balanced mode.

(7) The upper cover and the lower cover of the air guide piece are respectively fixedly attached with a heat insulation plate, the upper cover and the lower cover are respectively contacted with two communication devices which are adjacent from top to bottom, the heat insulation plates adopt fiber vacuum plates, each fiber vacuum plate comprises a fiber composite material outer layer and a vacuum inner layer formed in the fiber composite material outer layer through vacuumizing, and the heat conductivity of the fiber vacuum plates is as low as 0.001 w/m.k. Therefore, the air guide piece and the surface of the communication equipment have good heat insulation effect, and the heat of the shell of the communication equipment is prevented from being conducted through the air guide piece, and the heat and cold mixing influences the energy-saving performance of the air supply system.

In another aspect, referring to fig. 17, an embodiment of the present application further provides a heat exchange method, including:

after the frame type heat exchanger is started, the air inlet temperature and the air outlet temperature of the inner circulation channel and the outer circulation channel are collected in real time and reported to the controller;

and the controller calculates the air volume demand according to the collected and reported data. Specifically, the controller performs comprehensive operation according to the collected and reported data, and calculates the air volume demand in real time according to a built-in formula.

The controller calculates the rotating speeds of the inner circulating fan and the outer circulating fan in real time according to the air volume requirement, and transmits rotating speed control signals to the inner circulating fan and the outer circulating fan respectively so as to adjust the rotating speeds of the inner circulating fan and the outer circulating fan.

The controller calculates the temperature data and temperature difference data ratio of the air inlet and outlet of the inner circulation channel and the air inlet and outlet of the outer circulation channel, and compares the temperature data and the temperature difference data ratio with a preset temperature and temperature difference range to judge whether the heat exchange system achieves heat exchange balance.

If the judgment result is that the heat exchange system reaches heat exchange balance, the controller does not send a correction signal, and the internal circulation fan and the external circulation fan maintain the original rotating speed.

And if the judgment result shows that the heat exchange system does not reach the heat exchange balance, reversely calculating the correction data of the rotating speeds of the inner circulating fan and the outer circulating fan according to the range and the direction of the deviation, and sending correction signals to the inner circulating fan and the outer circulating fan.

If the heat exchange system still does not reach the heat exchange balance state after the preset cycle times and the fan is in the highest rotating speed state, the controller sends an instruction to start the spraying device, and the water mist sprayed by the spraying device is brought into the outer circulation channel by the outer circulation fan.

After the spraying device is started for a set time, the controller calculates the temperature data and the temperature difference data ratio of the air inlet and outlet of the inner circulation channel and the air inlet and outlet of the outer circulation channel again, and compares the temperature data and the temperature difference data ratio with the preset temperature and temperature difference ratio range to judge whether the heat exchange system achieves heat exchange balance.

And if the judgment result is that the heat exchange system achieves heat exchange balance, the maximum air supply and spray states are kept, and a fault alarm mode is displayed at the same time.

If the temperature is continuously reduced, the temperature is collected in real time to reach a preset temperature point and a preset time point, and the controller closes the spraying device.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (19)

1. A heat exchange system is characterized by comprising a cabinet body and a rack type heat exchanger, wherein a cabinet air duct and an air guide member are arranged in the cabinet body, the cabinet air duct comprises a cold air area, a hot air area and an air inlet cold pool area, the rack type heat exchanger is provided with an inner circulation channel and an outer circulation channel, the inner circulation channel is communicated with the cabinet air duct, and the outer circulation channel is isolated from the cabinet air duct;

the cold air area is positioned on a first side of the communication equipment arranged in the cabinet body, and the air inlet cold pool area is positioned on a second side of the communication equipment adjacent to the first side and communicated with an inlet of an internal heat exchange air channel of the communication equipment;

the hot air area is positioned on a third side opposite to the first side and a fourth side opposite to the second side of the communication equipment and is communicated with an outlet of an internal heat exchange air duct of the communication equipment;

the rack type heat exchanger is installed at the bottom of the cabinet body and below the communication equipment, the cold air area and the air inlet cold pool area are communicated through the air guide piece, and the cold air area and the air inlet cold pool area are both isolated from the hot air area.

2. The heat exchange system of claim 1, wherein the cold air zone, the hot air zone and the cold air inlet pool zone are separated by a partition plate and a communication device.

3. The heat exchange system of claim 1, wherein the internal heat exchange air duct of the communication device is a side-in side-out air duct, the inlet of the internal heat exchange air duct of the communication device is disposed at the second side of the communication device, and the outlet of the internal heat exchange air duct of the communication device is disposed at the third side of the communication device.

4. The heat exchange system of claim 1, wherein the cabinet body comprises a cabinet body frame, a first cabinet door mounted on a first side of the cabinet body frame, a second cabinet door mounted on a second side of the cabinet body frame, a first side plate mounted on a third side of the cabinet body frame, and a second side plate mounted on a fourth side of the cabinet body frame;

the cold air area is positioned between the first cabinet door and the first side of the communication equipment, and the air inlet cold pool area is positioned between the first side plate and the second side of the communication equipment;

the hot air area comprises a first hot air area and a second hot air area which are communicated with each other, the first hot air area is located between the second cabinet door and the third side of the communication equipment, and the second hot air area is located between the second side plate and the fourth side of the communication equipment.

5. The heat exchange system according to claim 1, wherein the air guide member comprises an upper cover, a lower cover and a heat insulation plate, the upper cover is fixed on the lower cover to form an air guide cavity therebetween, one side of the lower cover facing the cold air area is provided with an air guide inlet, one side of the lower cover facing the air inlet cooling pool area is provided with an air guide outlet, and the air guide inlet, the air guide cavity and the air guide outlet are sequentially communicated to form an air guide channel;

the upper cover and the lower cover are fixedly attached with the heat insulation plates, and the upper cover and the lower cover are respectively contacted with two communication devices which are adjacent up and down.

6. The heat exchange system of claim 5, wherein the air guide further comprises an inclined air guide plate disposed in the air guide cavity, and the inclined air guide plate is configured to guide cold air entering from the air guide inlet to the air guide outlet.

7. The heat exchange system of claim 5, wherein the insulation panel is a fibrous vacuum panel made of a fibrous composite material;

the fiber vacuum panel comprises a fiber composite outer layer and a vacuum inner layer formed in the fiber composite outer layer through vacuum pumping.

8. The heat exchange system of claim 7, wherein the thermal conductivity of the fibrous vacuum plates is 0.001 w/m.k.

9. The heat exchange system according to claim 1, wherein a plurality of the communication devices are stacked one on top of another, and the air guide is interposed between two adjacent layers of the communication devices.

10. The heat exchange system according to any one of claims 1 to 9, wherein the rack-mounted heat exchanger comprises a casing, an inner circulation fan, an outer circulation fan, a heat exchange core, a spraying device and a controller, the inner circulation fan, the outer circulation fan and the spraying device are respectively in signal connection with the controller, the heat exchange core is arranged in the casing, the inner circulation channel and the outer circulation channel are formed in the heat exchange core, the inner circulation fan, the outer circulation fan, the spraying device and the controller are installed outside the casing, the inner circulation fan is arranged at an air outlet of the inner circulation channel, and the outer circulation fan is arranged at an air outlet of the outer circulation channel;

the internal circulation fan is used for air circulation of the cabinet air duct and the internal circulation channel, the external circulation fan brings external cold air into the external circulation channel to exchange heat with hot air in the internal circulation channel, and brings the air after heat exchange out of the external circulation channel;

when the heat exchange capacity of the rack-mounted heat exchanger is insufficient, the controller sends an instruction to start the spraying device, and water mist sprayed by the spraying device is brought into the external circulation channel by the external circulation fan.

11. The heat exchange system of claim 10, wherein the heat exchange core is a microwave finned core, the microwave finned core is formed by stacking and brazing a plurality of heat exchange plates, a plurality of inner circulation fins, a plurality of outer circulation fins, a plurality of guide fins and a plurality of sealing strips, and the inner circulation fins and the outer circulation fins are alternately arranged along the stacking direction;

each internal circulation fin is clamped between the two heat exchange plates to form an internal air flow channel, and all the internal air flow channels form the internal circulation channel; each outer circulation fin is clamped between the two heat exchange plates, the guide fins are arranged at two ends of each inner circulation fin to form an outer air flow channel, and all the outer air flow channels form the outer circulation channel;

and hot air in the cabinet air duct passes through the inner side airflow channel and performs recuperative heat exchange with cold air entering the outer side airflow channel from the outdoor environment through the heat exchange plate.

12. The heat exchange system of claim 11 wherein the seals comprise inner and outer circulating seals;

the internal circulation sealing strips comprise internal circulation upper sealing strips, internal circulation lower sealing strips, internal circulation front sealing strips and internal circulation rear sealing strips, the internal circulation upper sealing strips cover the tops of the internal circulation fins, the internal circulation lower sealing strips cover the bottoms of the internal circulation fins and the bottoms of the guide fins, the internal circulation front sealing strips cover the front ends of the guide fins on the front side, and the internal circulation rear sealing strips cover the rear ends of the guide fins on the rear side;

the outer circulation sealing strips comprise outer circulation upper sealing strips and outer circulation lower sealing strips, the outer circulation upper sealing strips cover the tops of the outer circulation fins, and the outer circulation lower sealing strips cover the bottoms of the outer circulation fins.

13. The heat exchange system of claim 10, wherein the enclosure comprises a front protective screen, an upper mount, a shell, a duct mounting plate, a fan cover plate, an inner circulation fan mounting plate, and an outer circulation fan mounting plate;

the upper mounting piece is fixed above the shell, the fan cover plate is fixed at the top of the front end of the upper mounting piece, the internal circulation fan is arranged in the fan cover plate, the internal circulation fan mounting plate is mounted on the fan cover plate and covers the internal circulation fan, an internal circulation fan net is arranged on the internal circulation fan mounting plate, and an air outlet of the internal circulation channel faces the internal circulation fan;

the outer circulation fan is arranged on the outer circulation fan mounting plate, an outer circulation fan net is arranged on the outer circulation fan mounting plate, and an air outlet of the outer circulation channel faces the outer circulation fan.

14. The heat exchange system of claim 10, wherein the spray device comprises a conduit and an automatic atomizing nozzle connected to the conduit, the conduit being connected to a water line or tank external to the cabinet; when the heat exchange capacity of the rack-mounted heat exchanger is insufficient, the controller sends a command to open the automatic atomizing nozzle, water in the pipeline enters the automatic atomizing nozzle through pressurization and is sprayed out in a mist shape, and water mist sprayed out by the automatic atomizing nozzle is brought into the outer circulation channel by the outer circulation fan;

rack-mounted heat exchanger still includes pipeline mounting panel and waterproof strip, the pipe mounting is in the bottom of pipeline mounting panel, be provided with the opening on the casing, the pipeline mounting panel is installed on the casing and cover the opening, waterproof strip compresses tightly the assembly and is in between pipeline mounting panel and the casing, automatic atomizing nozzle passes through the opening stretches into space between extrinsic cycle fan and the heat transfer core.

15. A telecommunications cabinet including telecommunications equipment and the heat exchange system of any one of claims 11 to 14, the telecommunications equipment being mounted within the cabinet above the rack heat exchanger.

16. A method of exchanging heat, comprising:

after the frame type heat exchanger is started, the air inlet temperature and the air outlet temperature of the inner circulation channel and the outer circulation channel are collected in real time and reported to the controller;

the controller calculates the air volume demand according to the collected and reported data;

the controller calculates the rotating speeds of the inner circulating fan and the outer circulating fan in real time according to the air volume requirement, and transmits rotating speed control signals to the inner circulating fan and the outer circulating fan respectively so as to adjust the rotating speeds of the inner circulating fan and the outer circulating fan.

17. The heat exchange method of claim 16, further comprising:

the controller calculates the temperature data and temperature difference data ratio of the air inlet and outlet of the inner circulation channel and the air inlet and outlet of the outer circulation channel, and compares the temperature data and temperature difference data ratio with a preset temperature and temperature difference ratio range to judge whether the heat exchange system achieves heat exchange balance;

if the judgment result is that the heat exchange system reaches heat exchange balance, the controller does not send a correction signal, and the internal circulation fan and the external circulation fan maintain the original rotating speed;

and if the judgment result shows that the heat exchange system does not reach the heat exchange balance, reversely calculating the correction data of the rotating speeds of the inner circulating fan and the outer circulating fan according to the range and the direction of the deviation, and sending correction signals to the inner circulating fan and the outer circulating fan.

18. The heat exchange method of claim 17, further comprising:

if the heat exchange system still does not reach the heat exchange balance state after the preset cycle times and the fan is in the highest rotating speed state, the controller sends an instruction to start the spraying device, and the water mist sprayed by the spraying device is brought into the outer circulation channel by the outer circulation fan.

19. The heat exchange method of claim 18, further comprising:

after the spraying device is started for a set time, the controller calculates the temperature data and the temperature difference data ratio of the air inlet and the air outlet of the inner circulation channel and the air inlet and the air outlet of the outer circulation channel again, and compares the temperature data and the temperature difference data ratio with the preset temperature and temperature difference range to judge whether the heat exchange system achieves heat exchange balance;

if the judgment result is that the heat exchange system achieves heat exchange balance, the maximum air supply and spray states are kept, and a fault alarm mode is displayed at the same time;

if the temperature is continuously reduced, the temperature is collected in real time to reach a preset temperature point and a preset time point, and the controller closes the spraying device.

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