Surface cleaning apparatus

1. A surface cleaning apparatus comprising:

(a) a surface cleaning head,

(b) a fluid flow path extending from a dirty fluid inlet to a clean air outlet of the surface cleaning apparatus;

(c) an upper portion moveably mounted to the surface cleaning head and a portable cleaning unit that is removably mountable on the surface cleaning apparatus, the portable cleaning unit comprises an air treatment member and a suction motor provided in the fluid flow path; and,

(d) a power cord that is attachable to each of the portable cleaning unit and a portion of the surface cleaning apparatus other than the portable cleaning unit, whereby, in a first configuration, the power cord is attached to the portable cleaning unit and the suction motor is operable using power supplied by the power cord and, in a second configuration, the power cord is removed from the portable cleaning unit and is attached to the portion of the surface cleaning apparatus other than the portable cleaning unit and the suction motor is operable using power supplied by the power cord;

(e) an energy storage member; and,

whereby the suction motor is operable using current supplied from the energy storage member when the power cord is removed and operable using current supplied from an external source when the power cord is in electrical communication with the suction motor.

2. The surface cleaning apparatus of claim 1 wherein the surface cleaning apparatus further comprises an additional energy storage member that is exterior to the portable cleaning unit and the suction motor is operable using current from the additional energy storage member when the portable cleaning unit is mounted on the surface cleaning apparatus.

3. The surface cleaning apparatus of claim 2 wherein the additional energy storage member is provided on the surface cleaning head.

4. A surface cleaning apparatus comprising:

(a) a fluid flow path extending from a dirty fluid inlet to a clean air outlet; and

(b) an air treatment member and a suction motor provided in the fluid flow path;

(c) a surface cleaning unit housing the suction motor; and,

(d) a power cord reel comprising a power cord wherein the power cord reel is configured to automatically wind or unwind the power cord based on at least one operating condition of the surface cleaning apparatus wherein the power cord reel is a separate unit that is positioned to be stationary when the suction motor is moved during a cleaning operation of the surface cleaning apparatus, and the power cord reel communicates wirelessly with the surface cleaning unit.

5. The surface cleaning apparatus of claim 4 wherein the at least one operating condition is a direction of travel of the surface cleaning apparatus.

6. The surface cleaning apparatus of claim 4 wherein the at least one operating condition is a direction of travel of the surface cleaning unit.

7. The surface cleaning apparatus of claim 6 further comprising a control system that is capable of detecting an operating condition of the surface cleaning apparatus and then controlling the cord reel based on the operating condition.

8. The surface cleaning apparatus of claim 7 wherein the control system includes a sensor and a controller that receives an output signal of the sensor.

9. The surface cleaning apparatus of claim 8 wherein the sensor detects a rate and direction of movement of the surface cleaning unit.

10. The surface cleaning apparatus of claim 9 wherein the control system is configured to determine when the surface cleaning unit is moving forward and to unwind the power cord from the power cord reel at a given rate based on the speed of the movement.

11. The surface cleaning apparatus of claim 9 wherein the control system is configured to determine when the surface cleaning unit is moving forward and to unwind the power cord from the power cord reel when the surface cleaning unit is moved forwards.

12. The surface cleaning apparatus of claim 9 wherein the control system is configured to determine when the surface cleaning unit is moving backwards and to wind the power cord onto the power cord reel when the surface cleaning unit is moved backwards.

13. The surface cleaning apparatus of claim 9 wherein the control system is configured to determine when the surface cleaning unit is moving in a direction and to adjust a length of the power cord that extends from the power cord reel based on the direction of movement.

14. The surface cleaning apparatus of claim 8 , wherein the sensor is provided in the surface cleaning unit.

15. The surface cleaning apparatus of claim 8 , wherein the power cord reel comprises the sensor, the surface cleaning unit includes the controller, and the sensor and controller communicate wirelessly.

16. The surface cleaning apparatus of claim 4 further comprising a control system that is configured to determine when the surface cleaning unit is moving forward and the control system is configured to unwind the power cord from the power cord reel at a given rate based on a speed of the movement.

17. The surface cleaning apparatus of claim 4 further comprising a control system that is configured to determine when the surface cleaning unit is moving forward and the control system is configured to unwind the power cord from the power cord reel when the surface cleaning unit is moved forwards.

18. The surface cleaning apparatus of claim 4 further comprising a control system that is configured to determine when the surface cleaning unit is moving backwards and the control system is configured to wind the power cord onto the power cord reel when the surface cleaning unit is moved backwards.

19. The surface cleaning apparatus of claim 4 further comprising a control system that is configured to determine when the surface cleaning unit is moving in a direction and to adjust a length of the power cord that extends from the power cord reel based on the direction of movement.

20. The surface cleaning apparatus of claim 4 wherein the power cord reel has a first short cord that is configured to plug into a household electrical outlet and a second longer cord that is configured to be plugged into the surface cleaning apparatus.

21. The surface cleaning apparatus of claim 4 , wherein the power cord comprises a first cord portion connectable to the surface cleaning apparatus and a second cord portion connectable to an external power supply, and the power cord reel is configured to wind or unwind the first cord portion and the second cord portion simultaneously.