Heat dissipation subrack, heat dissipation cabinet, and backplane communication system

1. A heat dissipation subrack, comprising a cabinet body defining an accommodating space, wherein the cabinet body defines an air inlet, two air supplementing openings, and an air outlet, wherein:

the accommodating space has an air inlet region directly facing the air inlet and the two air supplementing openings, and a heat source region communicatively coupled to the air inlet region; wherein the air inlet has a first opening direction, each of the two air supplementing openings has a second opening direction, and the first opening direction and the second opening direction intersect in the air inlet region; and

the cabinet body comprises baffles disposed in the air inlet region and spaced apart from one another, wherein each of the baffles comprises two wind shielding surfaces, one of the two wind shielding surfaces faces one of the two air supplementing openings, the other of the two wind shielding surfaces faces the other of the two air supplementing openings, and areas of the wind shielding surfaces of the baffles increase sequentially along a direction away from the air supplementing openings, wherein airflow passages facing the air inlet and communicatively coupling the air inlet region to the heat source region are respectively defined between each two adjacent baffles as well as between one of inner walls of the cabinet body and the baffle adjacent to the one of the inner walls of the cabinet body.

2. The heat dissipation subrack according to claim 1 , wherein the baffles are parallel to one another.

3. The heat dissipation subrack according to claim 2 , wherein the first opening direction is parallel to the baffles.

4. The heat dissipation subrack according to claim 3 , wherein the second opening direction is perpendicular to the baffles.

5. The heat dissipation subrack according to claim 4 , wherein any two of the airflow passages has a same width in the second opening direction.

6. The heat dissipation subrack according to claim 4 , wherein the airflow passage located at a central region of the air inlet region has a first width in the second opening direction, and at least one of the airflow passages that is located at a non-central region of the air inlet region has a second width in the second opening direction, wherein the first width is larger than the second width.

7. The heat dissipation subrack according to claim 1 , wherein the baffles have a same length in the first opening direction, and the baffles have different heights in a direction perpendicular to the first opening direction and the second opening direction.

8. The heat dissipation subrack according to claim 3 , wherein the baffles are symmetrically disposed on both sides of the airflow passage located at a central region of the air inlet region.

9. The heat dissipation subrack according to claim 1 , wherein the heat source region is adjacent to the air inlet region and communicates the air inlet region and the air outlet; wherein

the cabinet body further comprises a perforated panel that is disposed at a junction of the air inlet region and the heat source region and defines a plurality of through holes, wherein each of the plurality of through holes communicates the heat source region and the airflow passages.

10. The heat dissipation subrack according to claim 9 , wherein a size of the perforated panel in the first opening direction is the same as that of the airflow passage located at a central region of the air inlet region in the first opening direction, and a size of the perforated panel in the second opening direction is the same as that of the airflow passage located at the central region of the air inlet region in the second opening direction, wherein the perforated panel covers the airflow passage located at the central region of the air inlet region, and each of the plurality of through holes communicates the heat source region and the airflow passage located at the central region of the air inlet region.

11. The heat dissipation subrack according to claim 1 , wherein the heat source region is adjacent to the air inlet region and communicates the air inlet region and the air outlet, wherein the cabinet body further comprises at least one first guide rail disposed at a junction of the air inlet region and the heat source region.

12. The heat dissipation subrack according to claim 11 , wherein the cabinet body further comprises at least one second guide rail disposed in the heat source region and above the at least one first guide rail, wherein the at least one second guide rail is disposed opposite to the at least one first guide rail.

13. The heat dissipation subrack according to claim 1 , wherein the baffles isolate the airflow passages from one another, the air inlet communicates with each of the airflow passages, and each of the air supplementing openings communicates with at least part of airflow passages located at a non-central region of the air inlet region.

14. A heat dissipation cabinet, comprising two heat dissipation subracks, wherein each of the two heat dissipation subracks comprises:

a cabinet body defining an accommodating space, wherein the cabinet body defines an air inlet, two air supplementing openings, and an air outlet, wherein

the accommodating space has an air inlet region directly facing the air inlet and the two air supplementing openings, and a heat source region communicatively coupled to the air inlet region; wherein the air inlet has a first opening direction, each of the two air supplementing openings has a second opening direction, and the first opening direction and the second opening direction intersect in the air inlet region; and

the cabinet body comprises baffles disposed in the air inlet region and spaced apart from one another, wherein each of the baffles comprises two wind shielding surfaces, one of the two wind shielding surfaces faces one of the two air supplementing openings, the other of the two wind shielding surfaces faces the other of the two air supplementing openings, and areas of the wind shielding surfaces of the baffles increase sequentially along a direction away from the air supplementing openings, wherein airflow passages facing the air inlet and communicatively coupling the air inlet region to the heat source region are respectively defined between each two adjacent baffles as well as between one of inner walls of the cabinet body and the baffle adjacent to the one of the inner walls of the cabinet body;

wherein the cabinet body of one of the two heat dissipation subracks is stacked on the cabinet body of the other of the two heat dissipation subracks.

15. The heat dissipation cabinet according to claim 14 , wherein the two cabinet bodies are symmetrically arranged.

16. The heat dissipation cabinet according to claim 14 , further comprising an air supplementing region defined between the two cabinet bodies and communicatively coupled to the air inlet regions of the two cabinet bodies, respectively; wherein the air supplementing region defines at least one airflow passage, an inlet port communicatively coupled to the at least one airflow passage in the heat dissipation region, and an exhaust port communicatively coupled to the at least one airflow passage in the heat dissipation region.

17. The heat dissipation cabinet according to claim 14 , further comprising a heat dissipation region defined between the two cabinet bodies and adjacent to an air supplementing region, wherein the heat dissipation region has at least one first airflow passage, and an inlet port and an exhaust port that respectively communicate with the at least one airflow passage in the heat dissipation region.

18. The heat dissipation cabinet according to claim 17 , wherein the inlet port has the second opening direction, the exhaust port and the air outlet have a same opening direction, and the at least one airflow passage in the heat dissipation region is L-shaped.

19. A backplane communication system, comprising at least one backplane, at least one heating element disposed on the at least one backplane, and a heat dissipation subrack, wherein the at least one backplane is disposed in an accommodating space, wherein the heat dissipation subrack comprises:

a cabinet body defining the accommodating space, wherein the cabinet body defines an air inlet, two air supplementing openings, and an air outlet, wherein

the accommodating space has an air inlet region directly facing the air inlet and the two air supplementing openings, and a heat source region communicatively coupled to the air inlet region; wherein the air inlet has a first opening direction, each of the two air supplementing openings has a second opening direction, and the first opening direction and the second opening direction intersect in the air inlet region; and

the cabinet body comprises baffles disposed in the air inlet region and spaced apart from one another, wherein each of the baffles comprises two wind shielding surfaces, one of the two wind shielding surfaces faces one of the two air supplementing openings, the other of the two wind shielding surfaces faces the other of the two air supplementing openings, and areas of the wind shielding surfaces of the baffles increase sequentially along a direction away from the air supplementing openings, wherein airflow passages facing the air inlet and communicatively coupling the air inlet region with the heat source region are respectively defined between each two adjacent baffles as well as between one of inner walls of the cabinet body and the baffle adjacent to the one of the inner walls of the cabinet body.