A ventilation system includes an inside air passage having inflow and outflow ends communicating with an indoor space to be ventilated, at least one permeable film unit including a permeable film, and an air supply passage having an inflow end communicating with an outdoor space and an outflow end connected to a downstream side of the permeable film in the inside air passage. The permeable film allows a target gas to pass and allows the target gas that has passed through the permeable film to be discharged into outdoor air. The target gas contains at least one of carbon dioxide and a volatile organic compound in indoor air that flows in the inside air passage. Alternatively or in addition, the ventilation system can include an outside air passage and a discharge passage in place of or in addition to the inside air passage and the air supply passage, respectively.

An air conditioner includes an indoor introduction air path configured to introduce air into an indoor space and an outdoor discharge air path configured to discharge air to an outdoor space, wherein the outdoor discharge air path includes an air path in which heat exchange is performed with the air introduced into the indoor space, and a by-pass path in which heat exchange is not performed with the air introduced into the indoor space, and the air conditioner further includes a controller configured to control the air discharged to the outdoor space so that the air discharged to the outdoor space flows to one of the air paths, in which the heat exchange is performed, and the by-pass path.

Provided are an air conditioner capable of indoor cooling and humidity control with a simple structure. The air conditioner comprises: a first air flow channel; a second air flow channel; a dehumidifying rotor which comprises a first region provided on the first air flow channel, a second region provided on the second air flow channel, and an adsorbent which alternately passes through the first region and the second region and adsorbs moisture in the first region or the second region; a cooling unit configured to cool air from which moisture is removed while passing through the first region; and a control unit configured to control the dehumidifying rotor and the cooling unit such that air flowing in the first air flow path is dehumidified and cooled and a temperature or humidity of the indoor area is detected to be adjusted to a set value.

The present disclosure is directed to provide an air conditioner using an evaporative cooler to cool a condenser and improve cooling efficiency, and configured to supply air, which passes through a dry channel of the evaporative cooler, to a humid channel to improve efficiency of the evaporative cooler. In order to implement above, the air conditioner according to the present disclosure includes an indoor unit including an evaporator of a heat pump configured to cool indoor air; and an outdoor unit including the evaporative cooler using evaporation latent heat of water generated from the humid channel to cool air which passes through the dry channel, a condenser of the heat pump cooled by air cooled while passing through the dry channel during a cooling mode, a condenser communication part provided so that some of the air which passes through the dry channel flows to the condenser, and a humid channel communication part provided so that the remaining air which passes through the dry channel flows to the humid channel.

A ventilation system includes an inside air passage having inflow and outflow ends communicating with an indoor space to be ventilated, at least one permeable film unit including a permeable film, and an air supply passage having an inflow end communicating with an outdoor space and an outflow end connected to a downstream side of the permeable film in the inside air passage. The permeable film allows a target gas to pass and allows the target gas that has passed through the permeable film to he discharged into outdoor air. The target gas contains at least one of carbon dioxide and a volatile organic compound in indoor air that flows in the inside air passage. Alternatively or in addition, the ventilation system can include an outside air passage and a discharge passage in place of or in addition to the inside air passage and the air supply passage, respectively.

A ventilator according to the present disclosure includes a first air flow path that draws in indoor air and blows out air into an indoor space, a second air flow path that draws in indoor air and blows out air to an outdoor space, first blower means placed in the first air flow path, second blower means placed in the second air flow path, a desiccant rotor which is placed across the first air flow path and the second air flow path and in which a portion located in the first air flow path and a portion located in the second air flow path are switched over time by rotation, and a first heat exchanger located upstream of the desiccant rotor in the first air flow path.

The present disclosure provides an air conditioner capable of improving user convenience because a ventilation mode in which heat exchange between indoor air and outdoor air is performed and a ventilation mode in which the heat exchange is not performed are selectable by a user and a controlling method of the air conditioner. To this end, the air conditioner includes an indoor introduction air path configured to introduce air into an indoor space and an outdoor discharge air path configured to discharge air to an outdoor space, wherein the outdoor discharge air path includes an air path in which heat exchange is performed with the air introduced into the indoor space, and a by-pass path in which heat exchange is not performed with the air introduced into the indoor space, and the air conditioner further includes a controller configured to control the air discharged to the outdoor space so that the air discharged to the outdoor space flows to one of the air path, in which the heat exchange is performed, and the by-pass path.

The present disclosure is directed to provide an air conditioner using an evaporative cooler to cool a condenser and improve cooling efficiency, and configured to supply air, which passes through a dry channel of the evaporative cooler, to a humid channel to improve efficiency of the evaporative cooler. In order to implement above, the air conditioner according to the present disclosure includes an indoor unit including an evaporator of a heat pump configured to cool indoor air; and an outdoor unit including the evaporative cooler using evaporation latent heat of water generated from the humid channel to cool air which passes through the dry channel, a condenser of the heat pump cooled by air cooled while passing through the dry channel during a cooling mode, a condenser communication part provided so that some of the air which passes through the dry channel flows to the condenser, and a humid channel communication part provided so that the remaining air which passes through the dry channel flows to the humid channel.

An absorption type carbon dioxide removal/concentration apparatus has a honeycomb rotor which holds an amine support solid absorbent. The honeycomb rotor is divided into at least a processing zone and a reproduction zone. An enthalpy (temperature and humidity) adjustment device is provided for the air for reproduction and/or the air to be processed. The apparatus can control the carbon dioxide absorbing performance and the concentration performance by passing processing and reproduction air through the corresponding zones. The absorption type carbon dioxide removal/concentration apparatus can remove or condense carbon dioxide, can secure high recovery efficiency and can prevent a thermal deterioration of the amine absorbent to extend the life-span of the apparatus.

Provided are an air conditioner capable of indoor cooling and humidity control with a simple structure. The air conditioner comprises: a first air flow channel; a second air flow channel; a dehumidifying rotor which comprises a first region provided on the first air flow channel, a second region provided on the second air flow channel, and an adsorbent which alternately passes through the first region and the second region and adsorbs moisture in the first region or the second region; a cooling unit configured to cool air from which moisture is removed while passing through the first region; and a control unit configured to control the dehumidifying rotor and the cooling unit such that air flowing in the first air flow path is dehumidified and cooled and a temperature or humidity of the indoor area is detected to be adjusted to a set value