Flow guide equipment and method and machine room air conditioning system

Abstract

The invention discloses flow guide equipment, a flow guide method and a machine room air conditioning system, and the flow guide equipment comprises a backflow box, a split type air supply mechanism and a hot air backflow mechanism. A cold air conveying cavity and a hot air backflow cavity are formed in the backflow box. The split type air supply mechanism is arranged above the backflow box, the split type air supply mechanism comprises an air supply fan, a cabinet ventilation part and an indoor ventilation part, the air supply fan is fixedly arranged in the cold air conveying cavity, and the cabinet ventilation part is used for conveying cold air into the cabinet. The hot air backflow mechanism is arranged below the backflow box and comprises a cabinet backflow component, an indoor backflow component and a filtering and flow guiding component. According to the flow guide equipment and method and the machine room air conditioning system, by arranging the split type air supply mechanism and the hot air backflow mechanism, the fresh air circulation effect in the machine room is remarkably improved, the cooling and heat dissipation uniformity of the machine room air conditioning system on equipment in the machine room is improved, and the actual application effect of the machine room air conditioning system is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of air conditioning diversion equipment for computer rooms, specifically relating to a diversion device, method, and air conditioning system for computer rooms. Background Technology

[0002] Airflow guiding equipment for computer room air conditioning systems is a device used to guide the ventilation of computer room air conditioning systems, thereby ensuring the uniformity of ventilation in the air conditioning system. Currently, common airflow guiding equipment for computer room air conditioning systems mainly consists of ventilation ducts, air outlet guide plates, and conveying fans. In practical applications, the ventilation status of the computer room air conditioning system is adjusted by adjusting the position of the air outlets and by adjusting the air outlet angle of the air outlets through the air outlet guide plates.

[0003] In the existing technology, common air diversion devices for computer room air conditioning systems mainly use ventilation ducts and air outlet deflectors for ventilation diversion. However, they do not adjust the return air state inside the computer room, resulting in poor fresh air circulation and uneven heat dissipation for the equipment in the computer room. Consequently, the actual application effect of the air diversion devices for computer room air conditioning systems is poor.

[0004] Therefore, in order to address the above-mentioned technical problems, it is necessary to provide a diversion device, a method, and a computer room air conditioning system.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide a flow guiding device, method, and computer room air conditioning system, which can improve the fresh air circulation effect in the computer room and improve the ventilation flow uniformity of the flow guiding device in the computer room air conditioning system.

[0007] To achieve the above objectives, a specific embodiment of the present invention provides the following technical solution:

[0008] A flow guiding device includes: a return box, a split-type air supply mechanism, and a hot air return mechanism.

[0009] The return box is equipped with a cold air delivery chamber and a hot air return chamber.

[0010] The split-type air supply mechanism is located above the return box. The split-type air supply mechanism includes an air supply fan, a cabinet ventilation component, and an indoor ventilation component. The air supply fan is fixedly installed inside the cold air delivery chamber. The cabinet ventilation component is used to deliver cold air into the cabinet, and the indoor ventilation component is used to deliver cold air into the computer room.

[0011] The hot air recirculation mechanism is located below the recirculation box. The hot air recirculation mechanism includes a cabinet recirculation component, an indoor recirculation component, and a filter guide component. The cabinet recirculation component is used to recirculate hot air inside the cabinet. The indoor recirculation component is used to recirculate hot air inside the room. The filter guide component is located inside the hot air recirculation chamber and is used to filter dust from the recirculated hot air.

[0012] In one or more embodiments of the present invention, a cold air delivery pipe is fixedly connected to the air inlet of the air supply fan. Cold air from the computer room air conditioning system can be delivered to the air supply fan via the cold air delivery pipe. A connecting pipe is fixedly connected to the air outlet of the cold air delivery pipe, and one end of the connecting pipe located outside the return box is fixedly connected to a delivery guide pipe. The cold air is delivered to the multi-component distribution pipes and indoor distribution pipes through the cooperation of the connecting pipe and the delivery guide pipe.

[0013] In one or more embodiments of the present invention, the cabinet ventilation component includes multiple sets of cabinet air supply frames, multiple sets of solenoid valves, and diversion air pipes. The air outlets of the multiple sets of cabinet air supply frames are arranged downwards. The multiple sets of cabinet air supply frames deliver the cold air transported in the diversion air pipes along the top of the cabinet into the cabinet. The multiple sets of solenoid valves are respectively connected to the air outlets of the multiple sets of cabinet air supply frames. The solenoid valves function to connect the diversion air pipes and the cabinet air supply frames, and the connection state between the diversion air pipes and the cabinet air supply frames is controlled by controlling the opening and closing state of the solenoid valves.

[0014] In one or more embodiments of the present invention, one end of the diversion air pipe is connected to the air inlet of multiple sets of solenoid valves, and the other end of the diversion air pipe is connected to the delivery guide pipe. The diversion air pipe serves to connect the solenoid valves and the delivery guide pipe, so that the cold air delivered in the delivery guide pipe can be delivered along the diversion air pipe to the air supply rack of the cabinet.

[0015] In one or more embodiments of the present invention, the indoor ventilation component includes multiple sets of indoor air supply frames, multiple sets of guide vanes, and indoor distribution pipes. The multiple sets of indoor air supply frames are staggered with the cabinet air supply frames. Cool air is delivered to the computer room through the multiple sets of indoor air supply frames. The multiple sets of guide vanes are rotatably mounted at the air outlets of the multiple sets of indoor air supply frames. The exhaust angle of the indoor air supply frames is adjusted by adjusting the angle of the multiple sets of guide vanes. One end of the indoor distribution pipe is connected to the multiple sets of indoor air supply frames, and the other end of the indoor distribution pipe is connected to the conveying guide pipe. The indoor distribution pipe connects the indoor air supply frames and the conveying guide pipe, allowing the cool air in the conveying guide pipe to be delivered to the indoor air supply frames along the indoor distribution pipe.

[0016] In one or more embodiments of the present invention, the rack return component includes multiple sets of rack return pipes and hot air return pipes. The air inlets of the multiple sets of rack return pipes are arranged facing upwards, and each set of rack return pipes corresponds to a rack air supply frame. Hot air within the rack is guided and transported through the multiple sets of rack return pipes. The hot air return pipes are connected to the air outlets of the multiple sets of rack return pipes. Hot air returning within the rack is transported through the hot air return pipes.

[0017] In one or more embodiments of the present invention, the indoor recirculation component includes multiple sets of indoor recirculation pipes, dust filters, recirculation connecting pipes, and dust-filtered recirculation pipes. The multiple sets of indoor recirculation pipes are arranged between multiple sets of cabinet air supply frames and cabinet recirculation pipes, and the air inlets of the multiple sets of recirculation connecting pipes are horizontally positioned. Hot air from inside the room can be recirculated and transported through the multiple sets of indoor recirculation pipes. The dust filters are fixedly installed at the air inlets of the indoor recirculation pipes. The dust filters treat the hot air recirculation from the indoor recirculation pipes with dust. The recirculation connecting pipes are connected to the air outlets of the multiple sets of indoor recirculation pipes. The recirculation connecting pipes connect the indoor recirculation pipes and the dust-filtered recirculation pipes. Both ends of the dust-filtered recirculation pipes are connected to the recirculation connecting pipes and the recirculation box, respectively. The dust-filtered recirculation pipes connect the recirculation connecting pipes, the hot air recirculation pipes, and the recirculation box, thereby facilitating the guiding and transport of the recirculated hot air.

[0018] In one or more embodiments of the present invention, the filtration and guiding component includes a dust filter cartridge, a filter screen cartridge, a flow guiding and limiting tube, and an exhaust pipe. The dust filter cartridge is fixedly disposed within the hot air return chamber. The dust filter cartridge filters and limits the return hot air. The filter screen cartridge is fixedly disposed within the dust filter cartridge, and the flow guiding and limiting tube is fixedly disposed within the filter screen cartridge and communicates with the dust filter return pipe. An impurity retention chamber is formed between the outer wall of the flow guiding and limiting tube and the inner wall of the filter screen cartridge. The impurity retention chamber collects and stores impurities in the return hot air. The exhaust pipe is fixedly disposed at the top of the dust filter cartridge. The filtered hot air from the dust filter cartridge is discharged through the exhaust pipe.

[0019] A traffic diversion method includes the following steps:

[0020] S1. The cold air from the air conditioning system is delivered to the air supply fan through the cold air delivery pipe. After being accelerated by the air supply fan, the cold air is delivered to the indoor distribution pipe and the distribution air pipe through the connecting pipe and the delivery guide pipe, respectively. The cold air delivered to the indoor distribution pipe can be discharged into the room under the guidance of multiple sets of guide plates, thereby cooling the room.

[0021] S2. By controlling the opening of the solenoid valve, the cold air in the diversion pipe can be transported to the cabinet along the cabinet air supply frame, thereby ventilating and cooling the inside of the cabinet.

[0022] S3. At the same time, the hot air in the cabinet can be returned to the dust filter cartridge along the cabinet return pipe, hot air return pipe and dust filter return pipe, and the hot air in the room can be returned to the dust filter cartridge along the indoor return pipe, return connection pipe and dust filter return pipe.

[0023] S4. The hot air that is returned to the dust filter cartridge is guided to the side of the filter screen cartridge by the flow limiting pipe, and after being filtered by the filter screen cartridge, it is discharged along the exhaust pipe.

[0024] A computer room air conditioning system includes the aforementioned airflow diversion device.

[0025] Compared with the prior art, the air diversion device, method and computer room air conditioning system disclosed in this invention significantly improves the fresh air circulation effect in the computer room by setting up a split air supply mechanism and a hot air return mechanism, improves the uniformity of cooling and heat dissipation of the equipment in the computer room by the computer room air conditioning system, and improves the practical application effect of the computer room air conditioning system. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a perspective view of a flow guiding device according to an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of a portion of the flow guiding device in one embodiment of the present invention;

[0029] Figure 3 This is a first front sectional view of the flow guiding device in one embodiment of the present invention;

[0030] Figure 4 This is a second front sectional view of the flow guiding device in one embodiment of the present invention;

[0031] Figure 5 for Figure 4 Schematic diagram of the structure at point A in the middle;

[0032] Figure 6 This is a schematic diagram of the airflow direction of the guiding device in one embodiment of the present invention.

[0033] Explanation of key figure labels:

[0034] 1-Return box, 2-Split air supply mechanism, 201-Air supply fan, 202-Cold air delivery pipe, 203-Connecting pipe, 204-Delivery guide pipe, 205-Rack air supply frame, 206-Solenoid valve, 207-Diverter pipe, 208-Indoor air supply frame, 209-Guide plate, 210-Indoor diverter pipe, 3-Hot air return mechanism, 301-Rack return pipe, 302-Hot air return pipe, 303-Indoor return pipe, 304-Dustproof net, 305-Return connecting pipe, 306-Dust filter return pipe, 307-Dust filter cartridge, 308-Filter screen cartridge, 309-Guide limiting pipe, 310-Exhaust pipe. Detailed Implementation

[0035] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0036] like Figures 1 to 6 As shown, the airflow guiding device in one embodiment of the present invention includes: a return box 1, a split-type air supply mechanism 2, and a hot air return mechanism 3. In practical applications, the split-type air supply mechanism 2 can guide and transport cold air from the computer room air conditioning system, and the hot air return mechanism 3 can return hot air from the computer room and server racks, thereby improving the fresh air circulation effect in the computer room.

[0037] like Figures 1 to 4 As shown, the return box 1 is equipped with a cold air delivery chamber and a hot air return chamber. The air supply fan 201 is assembled through the cold air delivery chamber. The hot air return chamber provides return dust filtration space for the dust filter cartridge 307, the filter screen cartridge 308, and the flow guide and limiting pipe 309.

[0038] like Figures 1 to 3 As shown, the split-type air supply mechanism 2 is located above the return box 1. The split-type air supply mechanism 2 includes an air supply fan 201, a cabinet ventilation component, and an indoor ventilation component. The air supply fan 201 is fixedly installed inside the cold air delivery chamber. By controlling the operation of the air supply fan 201, the cold air delivered by the cold air delivery pipe 202 can be accelerated.

[0039] Specifically, the air supply fan 201 is an axial flow fan, which has the advantages of high efficiency, energy saving and convenient maintenance.

[0040] like Figures 2 to 4As shown, a cold air delivery pipe 202 is fixedly connected to the air inlet of the air supply fan 201. Cold air from the computer room air conditioning system can be delivered to the air supply fan 201 through the cold air delivery pipe 202. A connecting pipe 203 is fixedly connected to the air outlet of the cold air delivery pipe 202, and one end of the connecting pipe 203 located outside the return box 1 is fixedly connected to a delivery guide pipe 204. The cold air is delivered to the multi-component flow pipe 207 and the indoor flow pipe 210 through the cooperation of the connecting pipe 203 and the delivery guide pipe 204.

[0041] like Figure 3 As shown, the rack ventilation component is used to deliver cool air into the rack. The rack ventilation component includes multiple rack air supply frames 205, multiple sets of solenoid valves 206, and distribution ducts 207. The air outlets of the multiple rack air supply frames 205 are downward-facing. The cool air delivered in the distribution ducts 207 is transported along the top of the rack into the rack via the multiple rack air supply frames 205. The multiple sets of solenoid valves 206 are connected to the air outlets of the multiple rack air supply frames 205. The solenoid valves 206 connect the distribution ducts 207 and the rack air supply frames 205, and the connection between the distribution ducts 207 and the rack air supply frames 205 is controlled by controlling the opening and closing of the solenoid valves 206.

[0042] like Figure 3 As shown, one end of the split air pipe 207 is connected to the air inlet of multiple sets of solenoid valves 206, and the other end of the split air pipe 207 is connected to the delivery guide pipe 204. The split air pipe 207 serves to connect the solenoid valves 206 and the delivery guide pipe 204, so that the cold air delivered in the delivery guide pipe 204 can be delivered along the split air pipe 207 to the air supply frame 205 of the cabinet.

[0043] like Figure 4 As shown, the indoor ventilation components are used to deliver cool air into the computer room. The indoor ventilation components include multiple sets of indoor air supply frames 208, multiple sets of deflectors 209, and indoor distribution pipes 210. The multiple sets of indoor air supply frames 208 are staggered with the cabinet air supply frames 205. Cool air is delivered into the computer room through the multiple sets of indoor air supply frames 208. The multiple sets of deflectors 209 are rotatably mounted at the air outlets of the multiple sets of indoor air supply frames 208. The exhaust angle of the indoor air supply frames 208 is adjusted by adjusting the angle of the multiple sets of deflectors 209.

[0044] like Figure 4 As shown, one end of the indoor distribution pipe 210 is connected to multiple sets of indoor air supply frames 208, and the other end of the indoor distribution pipe 210 is connected to the delivery guide pipe 204. The indoor distribution pipe 210 serves to connect the indoor air supply frames 208 and the delivery guide pipe 204, so that the cold air in the delivery guide pipe 204 can be delivered to the indoor air supply frames 208 along the indoor distribution pipe 210.

[0045] like Figures 4 to 6 As shown, the hot air recirculation mechanism 3 is located below the recirculation box 1. The hot air recirculation mechanism 3 includes a cabinet recirculation component, an indoor recirculation component, and a filter guide component. The cabinet recirculation component is used to recirculate hot air within the cabinet. The cabinet recirculation component includes multiple sets of cabinet recirculation pipes 301 and hot air recirculation pipes 302. The air inlets of the multiple sets of cabinet recirculation pipes 301 are upward-facing, and each set of cabinet recirculation pipes 301 corresponds to a cabinet air supply frame 205. The multiple sets of cabinet recirculation pipes 301 guide and transport the hot air within the cabinet. The hot air recirculation pipes 302 are connected to the air outlets of the multiple sets of cabinet recirculation pipes 301. The hot air recirculating within the cabinet is transported through the hot air recirculation pipes 302.

[0046] like Figures 4 to 6 As shown, the indoor recirculation component is used to recirculate indoor hot air. The indoor recirculation component includes multiple sets of indoor recirculation pipes 303, a dust filter 304, a recirculation connecting pipe 305, and a dust filter recirculation pipe 306. The multiple sets of indoor recirculation pipes 303 are arranged between multiple sets of cabinet air supply frames 205 and cabinet recirculation pipes 301, and the air inlets of the multiple sets of recirculation connecting pipes 305 are horizontally positioned. The multiple sets of indoor recirculation pipes 303 can recirculate and transport indoor hot air.

[0047] like Figures 4 to 6 As shown, a dust filter 304 is fixedly installed at the air inlet of the indoor return pipe 303. The dust filter 304 filters the hot air returning through the indoor return pipe 303. The return connection pipe 305 is connected to the air outlets of multiple sets of indoor return pipes 303. The return connection pipe 305 connects the indoor return pipe 303 to the dust filter return pipe 306. Both ends of the dust filter return pipe 306 are connected to the return connection pipe 305 and the return box 1, respectively. The dust filter return pipe 306 connects the return connection pipe 305, the hot air return pipe 302, and the return box 1, facilitating the guiding and transport of the returning hot air.

[0048] like Figures 4 to 5 As shown, a filter guide component is disposed within the hot air return chamber for filtering dust from the returning hot air. The filter guide component includes a dust filter cartridge 307, a filter screen cartridge 308, a flow guide and limiting pipe 309, and an exhaust pipe 310. The dust filter cartridge 307 is fixedly disposed within the hot air return chamber. The dust filter cartridge 307 filters and limits the returning hot air. The filter screen cartridge 308 is fixedly disposed within the dust filter cartridge 307, and the flow guide and limiting pipe 309 is fixedly disposed within the filter screen cartridge 308 and connected to the dust return pipe 306. An impurity retention chamber is formed between the outer wall of the flow guide and limiting pipe 309 and the inner wall of the filter screen cartridge 308. The impurity retention chamber collects and stores impurities in the returning hot air.

[0049] like Figures 4 to 5As shown, the exhaust pipe 310 is fixedly installed at the top of the dust filter cartridge 307. The filtered hot air inside the dust filter cartridge 307 is discharged through the exhaust pipe 310.

[0050] A traffic diversion method includes the following steps:

[0051] S1. The cold air from the air conditioning system is delivered to the air supply fan 201 through the cold air delivery pipe 202. After being accelerated by the air supply fan 201, the cold air is delivered to the indoor distribution pipe 210 and the distribution air pipe 207 through the connecting pipe 203 and the delivery guide pipe 204, respectively. The cold air delivered to the indoor distribution pipe 210 can be discharged into the room under the guidance of multiple sets of guide plates 209, thereby cooling the room.

[0052] S2. By controlling the opening of the solenoid valve 206, the cold air in the diversion pipe 207 can be delivered to the cabinet along the cabinet air supply frame 205, thereby ventilating and cooling the inside of the cabinet.

[0053] S3. At the same time, the hot air in the cabinet can be returned to the dust filter 307 along the cabinet return pipe 301, the hot air return pipe 302 and the dust filter return pipe 306. The hot air in the room can be returned to the dust filter 307 along the indoor return pipe 303, the return connection pipe 305 and the dust filter return pipe 306.

[0054] S4. The hot air that is returned to the dust filter cylinder 307 is guided by the flow limiting pipe 309 to the side of the filter screen cylinder 308, and after being filtered by the filter screen cylinder 308, it is discharged along the exhaust pipe 310.

[0055] A computer room air conditioning system includes the aforementioned airflow diversion device.

[0056] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0057] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A flow guiding device, characterized in that, include: A return box, wherein a cold air delivery chamber and a hot air return chamber are provided inside the return box; A split-type air supply mechanism is located above the return box. The split-type air supply mechanism includes an air supply fan, a cabinet ventilation component, and an indoor ventilation component. The air supply fan is fixedly installed inside the cold air delivery chamber. The cabinet ventilation component is used to deliver cold air into the cabinet, and the indoor ventilation component is used to deliver cold air into the computer room. A hot air recirculation mechanism is located below the recirculation box. The hot air recirculation mechanism includes a cabinet recirculation component, an indoor recirculation component, and a filter guide component. The cabinet recirculation component is used to recirculate hot air inside the cabinet. The indoor recirculation component is used to recirculate hot air inside the room. The filter guide component is located inside the hot air recirculation chamber and is used to filter dust from the recirculated hot air.

2. The flow guiding device according to claim 1, characterized in that, A cold air delivery pipe is fixedly connected to the air inlet of the blower, and a connecting pipe is fixedly connected to the air outlet of the cold air delivery pipe. The end of the connecting pipe located outside the return box is fixedly connected to a delivery guide pipe.

3. The flow guiding device according to claim 2, characterized in that, The cabinet ventilation components include multiple sets of cabinet air supply frames, multiple sets of solenoid valves, and diversion air pipes. The air outlets of the multiple sets of cabinet air supply frames are arranged downwards, and the multiple sets of solenoid valves are respectively connected to the air outlets of the multiple sets of cabinet air supply frames.

4. The flow guiding device according to claim 3, characterized in that, One end of the diversion air pipe is connected to the air inlet of multiple sets of solenoid valves, and the other end of the diversion air pipe is connected to the delivery guide pipe.

5. The flow guiding device according to claim 4, characterized in that, The indoor ventilation components include multiple sets of indoor air supply frames, multiple sets of guide plates, and indoor distribution pipes. The multiple sets of indoor air supply frames are distributed alternately with the cabinet air supply frames. The multiple sets of guide plates are rotatably mounted at the air outlets of the multiple sets of indoor air supply frames. One end of the indoor distribution pipe is connected to the multiple sets of indoor air supply frames, and the other end of the indoor distribution pipe is connected to the delivery guide pipe.

6. The flow guiding device according to claim 5, characterized in that, The rack return component includes multiple sets of rack return pipes and hot air return pipes. The air inlets of the multiple sets of rack return pipes are arranged facing upwards, and the multiple sets of rack return pipes are arranged in a one-to-one correspondence with the rack air supply frame. The hot air return pipes are connected to the air outlets of the multiple sets of rack return pipes.

7. The flow guiding device according to claim 6, characterized in that, The indoor recirculation component includes multiple sets of indoor recirculation pipes, dust filters, recirculation connecting pipes, and dust filter recirculation pipes. The multiple sets of indoor recirculation pipes are arranged between multiple sets of cabinet air supply frames and cabinet recirculation pipes. The air inlets of the multiple sets of recirculation connecting pipes are horizontally arranged. The dust filters are fixedly installed at the air inlets of the indoor recirculation pipes. The recirculation connecting pipes are connected to the air outlets of the multiple sets of indoor recirculation pipes. The two ends of the dust filter recirculation pipes are respectively connected to the recirculation connecting pipes and the recirculation box.

8. The flow guiding device according to claim 7, characterized in that, The filter guiding component includes a dust filter cylinder, a filter screen cylinder, a flow guiding and limiting pipe, and an exhaust pipe. The dust filter cylinder is fixedly installed in the hot air return chamber, the filter screen cylinder is fixedly installed inside the dust filter cylinder, the flow guiding and limiting pipe is fixedly installed inside the filter screen cylinder and connected to the dust return pipe, and an impurity retention chamber is formed between the outer wall of the flow guiding and limiting pipe and the inner wall of the filter screen cylinder. The exhaust pipe is fixedly installed at the top of the dust filter cylinder.

9. A flow guiding method, comprising the flow guiding device as described in claim 8, characterized in that, It also includes the following steps: S1. The cold air from the air conditioning system is delivered to the air supply fan through the cold air delivery pipe. After being accelerated by the air supply fan, the cold air is delivered to the indoor distribution pipe and the distribution air pipe through the connecting pipe and the delivery guide pipe, respectively. The cold air delivered to the indoor distribution pipe can be discharged into the room under the guidance of multiple sets of guide plates, thereby cooling the room. S2. By controlling the opening of the solenoid valve, the cold air in the diversion pipe can be transported to the cabinet along the cabinet air supply frame, thereby ventilating and cooling the inside of the cabinet. S3. At the same time, the hot air in the cabinet can be returned to the dust filter cartridge along the cabinet return pipe, hot air return pipe and dust filter return pipe, and the hot air in the room can be returned to the dust filter cartridge along the indoor return pipe, return connection pipe and dust filter return pipe. S4. The hot air that is returned to the dust filter cartridge is guided to the side of the filter screen cartridge by the flow limiting pipe, and after being filtered by the filter screen cartridge, it is discharged along the exhaust pipe.

10. A computer room air conditioning system, characterized in that, Includes the flow guiding device as described in claim 8.

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