Device for wetting and heating gases, preferably breathing gases in respirators
First Claim
1. Humidifying and heating apparatus for respiratory gas, comprising a transformer for inductively heating a humidifying liquid, and a vessel for containing said liquid and provided with an inlet and an outlet for said gas, wherein said transformer comprises a magnetic core having first and second legs and disposed in a housing, said first leg carrying a primary coil and said housing being formed with a socket, and wherein said vessel comprises a depending extension defining a plug connector releasably engageable in said housing socket, a secondary winding of said transformer being formed by a plate which is mounted in said plug connector and has an upper portion in contact with said liquid and a lower portion adapted to straddle said second leg when said plug connector is engaged in said socket.
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Accused Products
Abstract
In a humidifying and heating apparatus for respiratory gas, a transformer for inductively heating a humidifying liquid is provided in a housing having a socket, whilst a vessel for containing the liquid is made as a separable sterilizable or disposable unit through which the respiratory gas can be passed and which has a plug connector releasably engaged in the socket. The secondary transformer winding is in the form of a plate which is disposed in the plug connector and comprises an upper portion in contact with the liquid and a lower portion straddling the transformer core.
83 Citations
10 Claims
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1. Humidifying and heating apparatus for respiratory gas, comprising a transformer for inductively heating a humidifying liquid, and a vessel for containing said liquid and provided with an inlet and an outlet for said gas, wherein said transformer comprises a magnetic core having first and second legs and disposed in a housing, said first leg carrying a primary coil and said housing being formed with a socket, and wherein said vessel comprises a depending extension defining a plug connector releasably engageable in said housing socket, a secondary winding of said transformer being formed by a plate which is mounted in said plug connector and has an upper portion in contact with said liquid and a lower portion adapted to straddle said second leg when said plug connector is engaged in said socket.
- 2. Humidifying and heating apparatus for respiratory gas, comprising a transformer for effecting inductive heating of a humidifying liquid, a housing, an aperture defining a socket in the top of said housing, a magnetic core of said transformer being disposed in said housing, said core being constructed in two sections each forming part of first and second legs of said core, a primary coil for said transformer disposed around said first leg of said core, means for temporarily separating said core sections whereby to form a closable gap in said second leg beneath said socket, a vessel for containing said humidifying liquid, an inlet in said vessel for introducing respiratory gas to come into intimate contact with said humidifying liquid, an outlet in said vessel for withdrawing humidified said respiratory gas, said vessel including a depending extension defining a plug connector which is releasably engageable in said socket when said gap in said second leg is open, a transverse hole in said plug connector defining a tunnel in registry with said second leg, and a secondary winding for said transformer in the form of at least one channel-section plate having limbs mounted in said plug connector so as to be in contact with said humidifying liquid, said limbs being provided with transverse apertures aligned with said tunnel whereby, when said plug connector is engaged in said socket and said gap in said second leg is closed, said plate limbs straddle said second leg which is received in said tunnel.
Specification