Humidifier reservoir

A water reservoir for an apparatus for humidifying a flow of breathable gas, the water reservoir constructed and arranged to removably engage with a heater plate of the apparatus when in an operative position to provide heat to a volume of liquid in the water reservoir, the water reservoir comprising:

• a reservoir base including bottom and side walls forming a cavity structured to hold the volume of liquid;
• and
• a conductive portion provided to the reservoir base,
• wherein the conductive portion comprises a direct, non-removable and sealed connection with the reservoir base so as to form at least a portion of the reservoir base for holding the volume of liquid,
• wherein the conductive portion is adapted to removably and thermally engage with the heater plate when the water reservoir is in the operative position to allow thermal transfer of heat from the heater plate to the volume of liquid in use,
• wherein the conductive portion includes a thin film comprising a non-metallic material,
• wherein the thin film is provided as a separate and distinct structure from the reservoir base,
• wherein the thin film includes a wall thickness that is less than a wall thickness of the bottom and side walls of the reservoir base,
• wherein the thin film includes a first side adapted to form a bottom interior surface of the water reservoir exposed to the volume of liquid and a second side, opposite to the first side,
• wherein the second side of the thin film is adapted to form a bottom, exposed exterior surface of the water reservoir exposable to the heater plate to allow removable and thermal engagement with the heater plate when the water reservoir is in the operative position, and
• further comprising one or more ribs structured and arranged to extend across the thin film so as to create a force adapted to push the thin film against the heater plate when the water reservoir is in the operative position.

An apparatus for humidifying a flow of breathable gas, comprising:

• a water reservoir including a cavity structured to hold a volume of liquid, the water reservoir comprising a reservoir base and a thin film provided to the reservoir base,
• wherein the thin film comprises a direct, non-removable and sealed connection with the reservoir base so as to form at least a portion of the water reservoir for holding the volume of liquid,
• wherein the thin film includes a first side adapted to form a bottom interior surface of the water reservoir exposed to the volume of liquid and a second side, opposite to the first side, adapted to form a bottom exterior surface of the water reservoir,
• wherein the thin film comprises a non-metallic material, and
• wherein the thin film includes a wall thickness less than 1 mm;
• and
• a water reservoir dock forming a cavity structured and arranged to removably receive the water reservoir in an operative position, the water reservoir dock including a heater plate adapted to removably and thermally engage the thin film of the water reservoir in the operative position to allow thermal transfer of heat from the heater plate to the volume of liquid in use, and
• further comprising one or more ribs structured and arranged to extend across the thin film so as to create a force adapted to push the thin film against the heater plate when the water reservoir is in the operative position.