Dry cleaning machine and driving unit compartment

1. A dry cleaning machine comprising:

a fluid tight pressure vessel defined by a treatment compartment housing that defines a treatment compartment; and

a driving unit compartment housing that defines a driving unit compartment configured to withstand high pressure associated with the use of densified liquid state treatment gas,

wherein the driving unit compartment housing is connected to the treatment compartment housing, and the driving unit compartment and the treatment compartment are in fluid communication and have essentially the same pressure,

wherein the treatment compartment housing includes a transmission opening through which a transmission arrangement extends such that a driving unit projects from the transmission opening and a wall of the treatment compartment housing,

wherein the transmission opening is positioned above a maximal liquid level of the dry cleaning machine and configured such that gas flow is permitted through the transmission opening but liquid flow is not permitted through the transmission opening, and

wherein the driving unit compartment housing can be removable from the treatment compartment housing to access the driving unit compartment from outside the treatment compartment without having access to the treatment compartment.

2. The cleaning machine of claim 1 , wherein the treatment compartment housing includes a front wall, a back wall, and side walls, and wherein the driving unit compartment housing is connected to one wall of the treatment compartment housing such that the driving unit compartment housing covers less than half of the one wall.

3. The cleaning machine of claim 1 , wherein the driving unit compartment housing has a hoodlike shape.

4. The cleaning machine of claim 1 , wherein transmission opening is provided with a shielding device for reducing liquid communication between the treatment compartment and the driving unit compartment.

5. The cleaning machine of claim 1 , wherein the treatment compartment housing further includes a first fluid communication opening, the driving unit compartment housing has a second fluid communication opening, and wherein the first and second fluid communication openings are connected.

6. The cleaning machine of claim 5 , wherein the transmission opening is provided with a sealing that obstructs fluid communication between the treatment compartment and the driving unit compartment through the transmission opening.

7. The cleaning machine of claim 5 , further comprising at least one filter provided in the connection between the first and second fluid communication openings.

8. The cleaning machine of claim 5 , wherein the first and second fluid communication openings are connected via a duct.

9. The cleaning machine of claim 1 , wherein the transmission opening is provided with a sealing that obstructs fluid communication between the treatment compartment and the driving unit compartment through transmission opening.

10. The cleaning machine of claim 1 , further comprising:

a drum for receiving objects to be cleaned; and

a driving arrangement connected to the drum and operable to rotate the drum, wherein the drum is rotatably arranged in the treatment compartment and the driving arrangement is at least partially arranged in the driving unit compartment.

11. The cleaning machine of claim 10 , wherein the driving arrangement extends from the driving unit compartment into the treatment compartment through the transmission opening, and wherein a closing member, which includes the hoodlike driving unit compartment housing, is attached to the treatment compartment housing around a rim of the transmission opening with an entrance opening facing the transmission opening.

12. The cleaning machine of claim 11 , wherein a support structure is provided inside the driving unit compartment, wherein at least at one side of the transmission opening is mounted to the treatment compartment housing.

13. The cleaning machine of claim 12 , wherein a motor of the driving unit is mounted to the support structure.

14. The cleaning machine of claim 12 , wherein a transmission arrangement of the driving unit is mounted to the support structure.

15. The cleaning machine of claim 10 , wherein the drum is rotatable about an axis and wherein the driving unit compartment housing is located such that the driving arrangement is aligned with the axis.

16. The cleaning machine of claim 10 , wherein the drum is rotatable around a substantially horizontal axis.

17. The cleaning machine of claim 1 , wherein the fluid communication between the driving unit compartment and the treatment compartment takes place above ⅓ of the height of the treatment compartment.

18. The cleaning machine of claim 1 , wherein the densified liquid state treatment gas is carbon dioxide.

19. A dry cleaning machine comprising:

a treatment compartment having a drum rotatably disposed therein;

a driving unit compartment configured to withstand high pressure associated with the use of densified liquid state treatment gas having a motor disposed therein, the driving unit compartment being coupled to a wall of the treatment compartment; and

a seal provided between the treatment compartment and the driving unit compartment, wherein the motor is coupled to the drum via a rotatable shaft which extends between the treatment compartment and the driving unit compartment, the seal being positioned and configured such that gas flow is permitted and liquid flow is obstructed between the treatment compartment and the driving compartment,

wherein the driving unit compartment and the treatment compartment are in fluid communication and have essentially the same pressure, and

wherein the driving unit compartment can be removed from the treatment compartment such that the motor can be accessed without having access to the treatment compartment.

20. A cleaning machine including:

a treatment compartment housing having a drum rotatably disposed within a treatment compartment; and

a driving unit compartment housing having a driving unit disposed therein, the driving unit compartment housing being secured to a wall of the treatment compartment housing,

wherein the treatment compartment housing includes a transmission opening through which the transmission arrangement extends,

wherein the transmission opening is substantially closed by a sealing ring, bearing arrangement, and drum shaft such that when the driving unit compartment housing is removed from the treatment compartment housing, the driving unit can be accessed without having access to the treatment compartment,

wherein the pressure is balanced between the treatment compartment and the driving unit compartment, and

wherein the transmission opening is positioned at a level above a maximal liquid level of the drying cleaning machine and configured so as to permit gas flow and obstruct liquid flow between the treatment compartment and the driving unit compartment.