Tub for use in a humidifier

1 . A tub configured to receive a volume of liquid for a humidifier, comprising:

at least one plastic component having a bottom wall with a through hole; and

at least one metal component;

wherein the at least one metal component and the at least one plastic component are attached to each other in a fluid tight manner by a silicone seal, such that the at least one metal component and the at least one plastic component together form a space for receiving said volume of liquid,

wherein only an upper surface of the at least one metal component is treated with a silicone adhesion promoting agent,

wherein the silicone seal is attached to only the upper surface of the at least one metal component thereby leaving a lower surface of the at least one metal component exposed,

wherein the through hole is closed by said at least one metal component and said silicone seal, and

wherein the silicone seal covers at least a portion of the at least one metal component, wherein the portion of the at least one metal component is not overlapping with the plastic component; and/or the silicone seal covers at least a portion of the at least one plastic component, wherein the portion of the plastic component is not overlapping with the at least one metal component.

2 . The tub of claim 1 , wherein the at least one metal component includes an at least partially curved shape.

3 . The tub of claim 2 , wherein the at least partially curved shape of the at least one metal component is dome shaped in an outward direction.

4 . The tub of claim 3 , wherein the at least one metal component includes an outer annular section having a planar shape and overlapping the at least one plastic component, and

wherein the outer annular section is directly connected to the silicone seal.

5 . The tub of claim 1 , wherein the silicone seal is formed as a labyrinth seal.

6 . The tub of claim 1 , wherein the tub is configured to be associated with a lid, wherein the tub comprises a lid silicone seal arranged to provide a fluid seal between the lid and the tub, when the lid is attached to the tub in a closed position.

7 . The tub of claim 6 , wherein the lid silicone seal and the silicone seal attaching the plastic component to the metal component comprise a one-piece component.

8 . The tub of claim 1 , wherein only the at least one metal component is treated with the silicone adhesion promoting agent.

9 . The tub of claim 8 , wherein the at least one plastic component is formed using injection molding and wherein the silicone seal is attached to the at least one plastic component without the silicone adhesion promoting agent.

10 . The tub of claim 8 , wherein the silicone adhesion promoting agent is applied to a metal blank before the metal blank is formed into the at least one metal component.

11 . The tub of claim 1 , wherein the silicone adhesion promoting agent is applied to select areas of the upper surface of the at least one metal component so that at least a fraction of the at least one metal component remains uncoated.

12 . The tub of claim 11 , wherein a mask is applied to at least the fraction of the at least one metal component to shield portions that are intended to remain uncoated with silicone, wherein the mask is removed after application of the silicone seal or after application of the silicone adhesion promoting agent.

13 . The tub of claim 1 , wherein the silicone adhesion promoting agent is sprayed on, a surface treatment, dotting of a material, a plasma treatment, and/or a coronal treatment.

14 . The tub of claim 1 , wherein the at least one plastic component is formed using injection molding, and wherein the silicone seal is attached to the at least one plastic component without needing any adhesion promoting agent.

15 . The tub of claim 1 , wherein at least a portion of the at least one metal component is treated with an adhesion preventing agent.

16 . The tub according to claim 1 , wherein the silicone seal is formed as a seal providing a spring effect, by comprising a silicone spring element.

17 . The tub according to claim 1 , wherein at least a section of the at least one plastic component is treated with a silicone adhesion promoting agent.

18 . The tub according to claim 1 , wherein the silicone seal is formed from liquid silicone rubber.

19 . The tub according to claim 1 , wherein the at least one metal component and the at least one plastic component are only attached to each other by the silicone seal.

20 . The tub according to claim 1 , wherein the silicone seal forms at least one channel with two side walls, in which at least a section of the at least one plastic component is arranged.

21 . The tub according to claim 1 , wherein the silicone seal has a thickness between 0.01 mm and 0.2 mm, or

wherein the silicone seal has a thickness between 0.05 mm and 0.1 mm.

22 . The tub of claim 1 , wherein the at least one plastic component and/or the at least one metal component are rigid.

23 . The tub of claim 1 , wherein the tub is trough-shaped, having the bottom wall and one or more side walls surrounding the bottom wall, wherein the at least one plastic component is sleeve-shaped and forms the one or more side walls.

24 . The tub of claim 1 , wherein the at least one metal component is a flat metal plate.

25 . An apparatus for treating a respiratory disorder in a patient, the apparatus comprising:

a patient interface;

a controllable motor-blower configured to generate a supply of air at a positive pressure relative to ambient pressure; and

a tub according to claim 2 ; and

a heating element to heat liquid received within said tub.

26 . A method for manufacturing the tub of claim 1 , the method comprising:

providing the at least one metal component;

providing the at least one plastic component; and

attaching the at least one plastic component to the at least one metal component in a fluid tight manner by a silicone seal, such that the at least one metal component and the at least one plastic component together form a fluid tight space for receiving said volume of liquid,

wherein before the attaching of the at least one plastic component to the at least one metal component by the silicone seal, an adhesion promoting agent is applied to an upper surface only of the at least one metal component.

27 . The method of claim 26 , wherein the silicone adhesion promoting agent is sprayed on, a surface treatment, dotting of a material, a plasma treatment, and/or a coronal treatment.

28 . A tub configured to receive a volume of liquid for a humidifier, comprising:

at least one plastic component having a bottom wall with a through hole; and

at least one metal component;

wherein the at least one metal component and the at least one plastic component are attached to each other in a fluid tight manner by a silicone seal, such that the at least one metal component and the at least one plastic component together form a space for receiving said volume of liquid,

wherein only an upper surface of the at least one metal component is treated with a silicone adhesion promoting agent,

wherein the silicone seal is attached to only the upper surface of the at least one metal component thereby leaving a lower surface of the at least one metal component exposed,

wherein the through hole is closed by said at least one metal component and said silicone seal, and

wherein the silicone seal is formed as a labyrinth seal.

29 . An apparatus for treating a respiratory disorder in a patient, the apparatus comprising:

a patient interface;

a controllable motor-blower configured to generate a supply of air at a positive pressure relative to ambient pressure; and

a tub according to claim 28 ; and

a heating element to heat liquid received within said tub.

30 . A tub configured to receive a volume of liquid for a humidifier, comprising:

at least one plastic component having a bottom wall with a through hole; and

at least one metal component;

wherein the at least one metal component and the at least one plastic component are attached to each other in a fluid tight manner by a silicone seal, such that the at least one metal component and the at least one plastic component together form a space for receiving said volume of liquid,

wherein only an upper surface of the at least one metal component is treated with a silicone adhesion promoting agent,

wherein the silicone seal is attached to only the upper surface of the at least one metal component thereby leaving a lower surface of the at least one metal component exposed,

wherein the through hole is closed by said at least one metal component and said silicone seal, and

wherein the silicone seal forms at least one channel with two side walls, in which at least a section of the at least one plastic component is arranged.

31 . An apparatus for treating a respiratory disorder in a patient, the apparatus comprising:

a patient interface;

a controllable motor-blower configured to generate a supply of air at a positive pressure relative to ambient pressure; and

a tub according to claim 30 ; and

a heating element to heat liquid received within said tub.