Fan and air conditioning unit comprising the same

1. A fan, comprising:

a motor,

an impeller having an impeller axis of rotation, and

a stator, so as to define an air flow passage between an air inlet and an air outlet and a fan characteristic with a stall region,

wherein said motor, said impeller and said stator have a mode of operation and an arrangement so that an inlet air flow has an inlet trajectory through the air inlet of up to 360° in a direction perpendicular to said impeller axis of rotation, an outlet air flow has an outlet trajectory through the air outlet of up to 360° in a direction perpendicular to said impeller axis of rotation, and a passage air flow through the air flow passage has a 180° turn, and

wherein said mode of operation is a mode of constant operation with a set point within said stall region of said fan characteristic, such that the fan is constantly operating within the stall region, so as to sustain a radial outlet effect.

2. The fan as claimed in claim 1 , wherein said outlet trajectory is radial and has a radial airflow pattern being formed in a direction up to 90° from said impeller axis of rotation.

3. The fan as claimed in claim 1 , wherein said outlet trajectory is a radial outlet trajectory of up to 360 degrees.

4. The fan as claimed in claim 2 , wherein said radial outlet trajectory is rotatable about said impeller axis of rotation.

5. The fan as claimed in claim 1 , wherein said impeller is an axial impeller.

6. The fan as claimed in claim 1 , wherein a height of the stator is one half of a height of the impeller.

7. The fan as claimed in claim 1 , wherein a center of a height of the stator is positioned offset from a center of a height of the impeller so as to set an offset position of said stator.

8. The fan as claimed in claim 7 , wherein said offset position is a distance of one third of the height of said impeller from one face of the impeller and a distance of one sixth of the height of said impeller from an opposite face of the impeller.

9. An air conditioning unit, comprising:

a fan, according to claim 1 .

10. The air conditioning unit, as claimed in claim 9 , further comprising:

a main body having a first face, said air outlet being disposed on said first face said air inlet and said air outlet defining said air flow passage between the air inlet and the air outlet on said first face, said fan being disposed within said main body; and

a thermal element disposed within the said air flow passage upstream of said fan, said air inlet and said thermal element being disposed at a periphery of said first face.

11. The air conditioning unit according to claim 10 , wherein said impeller axis of of rotation is perpendicular to the said first face.

12. The air conditioning unit according to claim 11 , wherein said impeller axis of rotation is centered on said first face.

13. The air conditioning unit according to claim 10 , wherein the first face is configured so as to be exposed to a temperature-controlled space.

14. The air conditioning unit according to claim 13 , wherein the fan is positioned so as to vent air directly into the temperature-controlled space.

15. The air conditioning unit according to claim 10 , wherein the air inlet and said thermal element extend along at least 50% of the periphery of the first face.

16. The air conditioning unit according to claim 10 , wherein the air outlet and the airflow passage are arranged so as to set an airflow velocity through the airflow passage at the thermal element less than 50% of an airflow velocity through the airflow passage downstream of the fan.

17. The air conditioning unit according to claim 10 , wherein the fan has a face velocity of about 0.8 m/s at the first face, an airflow velocity through the airflow passage at the thermal elements being between 0.5 and 1.5 m/s.

18. The air conditioning unit according to claim 10 , wherein the thermal element is mounted to a first housing portion of the main body, and wherein the fan is mounted to a second housing portion of the main body, the second housing portion being hinged to the first housing by a hinge.

19. The air conditioning unit according to claim 18 , wherein the second housing portion has a first position relative to the first housing portion for operation of said fan and a second position relative to the first housing portion for maintenance access, and wherein the second housing portion is rotatable between said first position and said second position by said hinge.

20. The air conditioning unit according to claim 10 , further comprising:

an installation frame being configured to mount on a ceiling, said main body being mounted to said installation frame.

21. The air conditioning unit according to claim 10 , wherein said thermal element comprises a thermal coil.

22. A structure, comprising:

the air conditioning unit of claim 10 ,

a floor; and

a ceiling having a ceiling void and being connected to said floor so as to define a temperature controlled space between said floor and said ceiling,

wherein said main body is disposed within a said ceiling void, said first face is being exposed to said temperature controlled space.

23. The structure, according to claim 22 , wherein said floor comprises a floor void in fluid connection with said temperature controlled space.

24. The A structure, comprising:

the air conditioning unit of claim 9 ,

a floor;

a ceiling; and

a vertical wall being connected to said floor and said ceiling so as to define a temperature controlled space defined between the floor, the ceiling and the wall,

wherein said main body is disposed within said vertical wall, said first face being oriented vertically and exposed to said temperature controlled space.

25. The structure, according to claim 24 , wherein the said vertical wall comprises a void adjacent said air inlet, said void being in gaseous communication with the said temperature controlled space.