Air composition adjusting device
AssigneeDaikin Industries, Ltd.
InventorsNoritaka KAMEI, Naohiro TANAKA, Hidenori MATSUI
Life of this patent
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Abstract
An air composition adjusting device includes: an oxygen separator that separates oxygen from external air to be supplied to a target space; a gas supply path including a high concentration gas supply path for oxygen through which the oxygen separator communicates with the target space; and a controller that performs an oxygen concentration raising operation of supplying a high oxygen concentration gas, which has a higher oxygen concentration than external air before being treated by the oxygen separator, to the target space through the high concentration gas supply path for oxygen.
Claims6
An air composition adjusting device for adjusting composition of air in a target space, comprising:
- a pump configured to compress and discharge air-to-be-treated to be supplied to the target space;
- a separator including a first separation membrane which has a nitrogen permeability lower than an oxygen permeability and a carbon dioxide permeability, a first primary-side outlet from which a low oxygen concentration gas that has not permeated through the first separation membrane flows out, and a first secondary-side outlet from which a high oxygen concentration gas that has permeated through the first separation membrane flows out;
- a first primary-side pipe having one end connected to the first primary-side outlet and another end connected to a supply pipe for supplying the air that has flows out from the separator to the target space;
- a first secondary-side pipe having one end connected to the first secondary-side outlet and another end opening to an outside of the target space;
- a first primary-side switching valve disposed in a middle part of the first primary-side pipe, having three ports, and configured to be switched between a first state in which a first port communicates with a second port and is shut off from a third port, and a second state in which the first port communicates with the third port and is shut off from the second port;
- and
- a first secondary-side switching valve disposed in a middle part of the first secondary-side pipe, having three ports, and configured to be switched between a first state in which a first port communicates with a second port and is shut off from a third port, and a second state in which the first port communicates with the third port and is shut off from the second port,
- the first port and the second port of the first primary-side switching valve being connected to the first primary-side pipe, and the third port of the first primary-side switching valve being connected to the first secondary-side pipe,
- the first port and the second port of the first secondary-side switching valve being connected to the first secondary-side pipe, and the third port of the first secondary-side switching valve being connected to the supply pipe.
Dependencies are inferred from the claim text.