Door actuator for cooling a fire door

• US 6,779,309 B2
• Filed: 10/23/2002
• Issued: 08/24/2004
• Est. Priority Date: 03/15/2000
• Status: Expired due to Fees

• Current Assignee: Marioff Corporation Oy (Carrier Global Corporation)
• Original Assignee: Marioff Corporation Oy (Carrier Global Corporation)
• Inventors: Sundolm, Göran
• Primary Examiner(s): Strimbu, Gregory J.
• Application Number:
  US10/204,164
• Publication Number:
  US 20030115804A1
• Time in Patent Office: 671 Days
• Field of Search: 49/1, 493/56, 493/60
• US Class Current: 49/360
• CPC Class Codes: A62C 2/241 having mechanical actuators and heat sensitive parts

Abstract

A hydraulic fire door, especially a sliding door, which can be selectively opened or closed by an actuator. In order to ensure a particularly fire resistant fire door without the heat resistance of the basic structure thereof having to be particularly fire resistant, the actuator is arranged to supply aqueous liquid to the fire door in order to cool it using the aqueous liquid.

Claims

1. A hydraulic fire door which can be selectively opened or closed, the fire door being provided with an actuator (3, 3′

) for moving the door between an opened position and a closed position, wherein the actuator (3, 3′

) is arranged to supply aqueous liquid to the fire door in order to cool the fire door using the aqueous liquid.

2. A fire door as claimed in claim 1, wherein the actuator is arranged to supply said aqueous liquid onto a facing surface of the fire door.

3. A fire door as claimed in claim 1, wherein the actuator (3, 3′

) is arranged to supply said liquid through a feeding channel (6, 6′

) to an upper part of the fire door.

4. A fire door as claimed in claim 3, wherein the feeding channel (6, 6′

) comprises a set of spray openings (7, 7′

) arranged at the upper part of the fire door for supplying said liquid onto a facing surface of the fire door.

5. A fire door as claimed in claim 3, wherein the feeding channel (6, 6′

) comprises an opening valve (8, 8′

) for opening the fire door when the fire door is in the closed position.

6. A fire door as claimed in claim 5, wherein the opening valve (8, 8′

) is functionally connected to an actuating means (9, 9′

) arranged for closing the opening valve for opening the closed fire door.

7. A fire door as claimed in claim 6, wherein the actuating means is a mechanical device (9) arranged on the door.

8. A fire door as claimed in claim 6, wherein the actuating means comprises an at least partly electrical device (9′

).

9. A fire door as claimed in claim 6, wherein the opening valve (8′

) comprises a solenoid (130′

) for opening the opening valve and for closing the fire door from the opened position.

10. A fire door as claimed in claim 6, wherein the opening valve (8′

) comprises a thermal trigger means (120′

) for opening the opening valve and for closing the opened fire door.

11. A fire door as claimed in claim 1, wherein the actuator (3, 3′

) is connected to a line (4, 4′

) leading to spray heads (10, 10′

) in a fire extinguishing system.

12. A fire door as claimed in claim 11, wherein a throttle valve (11, 11′

) is arranged between the line (4, 4′

) and the actuator (3, 3′

).

13. A fire door as claimed in claim 12, wherein the throttle valve (11) comprises a solenoid (13) for closing the throttle valve and for opening the fire door from the closed position.

14. A fire door as claimed in claim 12, wherein the throttle valve (11) comprises a thermal trigger means (12) for closing the opened fire door.

15. A fire door as claimed in claim 1, wherein the fire door is made of glass.

16. A fire door as claimed in claim 15, wherein the fire door comprises spaced glass surfaces (14a, 14b, 14a′

, 14b′

) and a feeding channel (6, 6′

) is arranged to supply said liquid into a space (15, 15′

) between the surfaces.

17. A fire door as claimed in claim 16, wherein the fire door comprises a passage (60, 60′

), the passage being a part of said feeding channel (6, 6′

).

18. A fire door as claimed in claim 17, wherein the passage (60, 60′

) is formed inside a frame of the door.

19. A fire door as claimed in claim 17, wherein a lower part of the fire door comprises at least one liquid outlet opening (16, 16′

).

20. A fire door as claimed in claim 19, wherein an upper part of the fire door comprises an overflow opening (17) for emptying the liquid into the lower part of the fire door.

21. A fire door as claimed in claim 1, wherein the actuator is a piston cylinder unit (3, 3′

) comprising a piston (1, 1′

) and a cylinder (2, 2′

).

22. A fire door as claimed in claim 21, wherein the piston (1, 1′

) of the piston cylinder unit (3, 3′

) comprises a free end (18, 18′

) and an opposite end (19, 19′

) arranged opposite to the free end, said opposite end (19, 19′

) being connected to a piston rod (20, 20′

) that is surrounded by an opening (21, 21′

) in the cylinder, and the piston rod and the piston comprise a through passage (22, 24, 22′

, 24′

) for supplying said liquid into a first space (23, 23′

) between the cylinder and the free end of the piston and a second space (25, 25′

) defined by the piston rod, the opposite end of the piston and the cylinder.

23. A fire door as claimed in claim 22, wherein a flow resistance of the passage (22, 24, 22′

, 24′

) leading to the first space (23, 23′

) exceeds a flow resistance of the passage leading to the second space (25, 25′

).

24. A fire door as claimed in claim 1, wherein the fire door is a sliding door.

25. A fire protection system comprising a fire extinguishing system and a hydraulic fire door which can be selectively opened or closed, the fire door being provided with an actuator (3, 3′

) for moving the fire door between an opened position and a closed position, wherein the actuator (3, 3′

) is arranged to feed aqueous liquid to the fire door in order to cool the fire door using the aqueous liquid.

26. A fire protection system as claimed in claim 25, wherein the actuator is arranged to supply said aqueous liquid onto a facing surface of the fire door.

27. A fire protection system as claimed in claim 26, wherein the actuator is a piston cylinder unit (3, 3′

) comprising a piston (1, 1′

) and a cylinder (2, 2′

).

28. A fire protection system as claimed in claim 25, wherein the actuator (3, 3′

) is connected to a line (4, 4′

) of a fire extinguishing system for feeding said liquid through an output (5, 5′

) of the actuator (3, 3′

) to a feeding channel (6, 6′

) of the fire door.

29. A fire protection system as claimed in claim 28, wherein the line is a feeding line (4, 4′

) leading to spray heads (10, 10′

) in the fire extinguishing system.