Disclosed is a control method of a ventilation apparatus, the method including: a determination step in which measured outdoor temperature and humidity and the measured indoor temperature and humidity are equal to or greater than a set temperature and a set humidity; and a drying operation step in which, when the outdoor temperature and humidity and the indoor temperature and humidity, reach the set temperature and the set humidity, a first desiccant heat exchanger and a second heat exchanger operate in a dry mode, wherein the first desiccant heat exchanger is provided in a first common passage, through which indoor space air or outdoor space air flows, to absorb or desorb moisture, and the second desiccant heat exchanger is provided in a second common passage, which is separate from the first common passage, and through which indoor air or outdoor air flows, to absorb or desorb moisture in air.

The present disclosure relates to a heating, ventilating, and air conditioning (HVAC) system that includes a refrigerant circuit and a sensor configured to measure a refrigerant concentration external to the refrigeration circuit. The HVAC system also includes a controller that is communicatively coupled to the sensor and to an economizer. The controller is configured to control a flow of environmental air into the HVAC system. The controller is further configured to increase a ratio of the flow of environmental air relative to a flow of return air from a conditioned interior space of a building when the sensor measures the refrigerant concentration above a predetermined threshold concentration.

The present disclosure relates to a heating, ventilating, and air conditioning (HVAC) system that includes a refrigerant circuit and a sensor configured to measure a refrigerant concentration external to the refrigeration circuit. The HVAC system also includes a controller that is communicatively coupled to the sensor and to an economizer. The controller is configured to control a flow of environmental air into the HVAC system. The controller is further configured to increase a ratio of the flow of environmental air relative to a flow of return air from a conditioned interior space of a building when the sensor measures the refrigerant concentration above a predetermined threshold concentration.

An environmental control unit, such as an. HVAC or heat pump unit, includes a housing which contains four main components: a blower which draws air into the housing via an air inlet and exhausts air from the housing via an air outlet; a first heat exchanger that exchanges heat through the air and is located between the air inlet and the blower; a second heat exchanger, which exchanges heat through water and is disposed in the second area of the housing; and a compressor. The environmental control unit having a predetermined set of parts can be arranged in multiple configurations to meet installation requirements, where configurations include air entering from the left side or, alternatively, from the right of the environmental control unit. The configurations utilize the same parts and provide front-facing access to fluid connections and the control board.

An integrated air conditioner comprises: a housing partitioned into a first housing on the upper side thereof and a second housing on the lower side thereof, wherein the first housing has a first intake port through which external air is introduced thereinto and a first exhaust port through which internal air is exhausted therefrom, and the second housing has a second intake port through which external air is introduced thereinto and a second exhaust port through which internal air is exhausted therefrom; a compressor provided in the interior of the housing to compress a refrigerant; a condenser that is provided on a second fluid channel, which connects the second intake port and the second exhaust port, and condenses the compressed refrigerant, supplied from the compressor, into a liquid phase; an expansion unit that expands the refrigerant, condensed in the condenser, into a low-pressure refrigerant; and an evaporator.

An integrated air conditioner comprises: a housing partitioned into a first housing on the upper side thereof and a second housing on the lower side thereof, wherein the first housing has a first intake port through which external air is introduced thereinto and a first exhaust port through which internal air is exhausted therefrom, and the second housing has a second intake port through which external air is introduced thereinto and a second exhaust port through which internal air is exhausted therefrom; a compressor provided in the interior of the housing to compress a refrigerant; a condenser that is provided on a second fluid channel, which connects the second intake port and the second exhaust port, and condenses the compressed refrigerant, supplied from the compressor, into a liquid phase; an expansion unit that expands the refrigerant, condensed in the condenser, into a low-pressure refrigerant; and an evaporator.

Movable air conditioner and a control method. The movable air conditioner includes a water receiving tray configured to receive condensed water generated by an evaporator of the movable air conditioner, a first water collection area, a second water collection area; a water guiding member configured to selectively guide the condensed water in the water receiving tray to the first water collection area or the second water collection area, and a controller configured to control the water guiding member to the guide condensed water in the water receiving tray to the first water collection area, and configured to control the water guiding member to guide the condensed water in the water receiving tray to the second water collection area when a water level of the first water collection area reaches a preset value.

An HVAC system includes an indoor heat-exchange coil disposed between a supply air duct and a return air duct. A damper is disposed in a re-circulation duct and is moveable between an open position and a closed position. A controller is configured to determine if the HVAC system is operating in a heating mode or an air-conditioning mode. Responsive to a determination that the HVAC system is operating in the air-conditioning mode, the controller is configured to determine if the variable-speed indoor circulation fan is operating at a minimum speed and if the relative humidity measured by the humidity sensor is above a pre-determined threshold. Responsive to a determination that the variable-speed indoor circulation fan is operating at the minimum speed and the relative humidity of the enclosed space is above the pre-determined threshold, the controller signals the damper to move to the open position.

An HVAC system includes an indoor heat-exchange coil disposed between a supply air duct and a return air duct. A damper is disposed in a re-circulation duct and is moveable between an open position and a closed position. A controller is configured to determine if the HVAC system is operating in a heating mode or an air-conditioning mode. Responsive to a determination that the HVAC system is operating in the air-conditioning mode, the controller is configured to determine if the variable-speed indoor circulation fan is operating at a minimum speed and if the relative humidity measured by the humidity sensor is above a pre-determined threshold. Responsive to a determination that the variable-speed indoor circulation fan is operating at the minimum speed and the relative humidity of the enclosed space is above the pre-determined threshold, the controller signals the damper to move to the open position.

Disclosed are an Internet of Things (IoT)-based smart hybrid dehumidification system capable of reducing energy consumption, that is, the usage of a heater by using the condensation heat of a pre-cooler as a heat source for heating a rotor for releasing moisture in a dehumidification device to the outside, and a control method therefor. The IoT-based smart hybrid dehumidification system includes a sensing unit provided in a dehumidification space, a direct heating unit configured to suction humid air and supply dehumidified dry air to the dehumidification space, a direct digital controller (DDC) configured to control the direct heating unit, and a user terminal configured to remotely control the DDC in real time according to a sensing signal sensed by the sensing unit, and thus it is possible to maximize user convenience.