Respiration humidifier
First Claim
1. A respiration humidifier for use with a respiratory gas channel flowing respiratory gas, the respiration humidifier comprising:
- a metering device for feeding water; and
an electrically heated evaporator having an inlet and an outlet, said inlet having a connection with said metering device and said outlet being connectable to the respiratory gas channel, said metering device providing a water feed in an amount to control a relative humidity of the respiratory gas at a predetermined respiratory gas temperature to said evaporator per unit of time as a function of an amount of respiratory gas flowing through per unit of time, and said evaporator providing water vapor and controlling a water vapor temperature above 134°
C., to heat the respiratory gas and control a temperature of the respiratory gas on mixing of the water vapor with the respiratory gas.
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Accused Products
Abstract
A respiration humidifier has a metering device (3, 10) and an electrically heated evaporator (4), which is in connection with or can be connected to the metering device (3, 10) on its inlet side (E) and with a respiratory gas channel (5), through which respiratory gas can flow, on its outlet side (A). The metering device (3, 10) feeds the amount of water necessary for humidifying the respiratory gas to a predetermined relative humidity of the respiratory gas at a predetermined respiratory gas temperature to the evaporator (4) per unit of time as a function of the amount of respiratory gas flowing through per unit of time. The evaporator (4) provides water vapor with a temperature above 134° C., which heats the respiratory gas to the predetermined respiratory gas temperature on mixing with the respiratory gas to be humidified.
182 Citations
21 Claims
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1. A respiration humidifier for use with a respiratory gas channel flowing respiratory gas, the respiration humidifier comprising:
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a metering device for feeding water; and an electrically heated evaporator having an inlet and an outlet, said inlet having a connection with said metering device and said outlet being connectable to the respiratory gas channel, said metering device providing a water feed in an amount to control a relative humidity of the respiratory gas at a predetermined respiratory gas temperature to said evaporator per unit of time as a function of an amount of respiratory gas flowing through per unit of time, and said evaporator providing water vapor and controlling a water vapor temperature above 134°
C., to heat the respiratory gas and control a temperature of the respiratory gas on mixing of the water vapor with the respiratory gas. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A respiration system for flowing respiratory gas, comprising:
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a respiratory gas channel through which the respiratory gas flows; an evaporator having an inlet and an outlet, said outlet having a connection to said respiratory gas channel, and said evaporator receiving water from said inlet and heating the water to provide water vapor at a water vapor temperature above 134°
C., said evaporator mixing said water vapor with the respiratory gas in said respiratory gas channel to form humidified respiratory gas, said evaporator controlling a temperature of said humidified respiratory gas by controlling heating of said water vapor;a metering device feeding water to said inlet of said evaporator, said metering device controlling a humidity of said humidified respiratory gas by controlling a rate of water feed to said evaporator. - View Dependent Claims (14, 15, 16)
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17. A respiration process comprising the steps of:
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providing a respiratory gas channel; flowing respiratory gas in the respiratory gas channel; providing a heated evaporator having an inlet and an outlet, said outlet being in communication with the respiratory gas channel; feeding water to said inlet of said evaporator; heating the water in said evaporator to evaporate the water into water vapor and raise the temperature of the water vapor to a water vapor temperature; mixing the water vapor and the respiratory gas to create a humidified respiratory gas at a mixed humidity and at a mixed temperature; controlling said mixed humidity of said humidified respiratory gas by controlling said feeding of water; controlling said mixed temperature of said humidified respiratory gas by controlling said heating of said water vapor. - View Dependent Claims (18, 19, 20, 21)
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Specification