An air-conditioning apparatus having a refrigerant circuit, in which a compressor, an outdoor heat exchanger, an expansion device, and an indoor heat exchanger are connected by a pipe and refrigerant circulates in the pipe, includes an indoor fan configured to supply an indoor air to the indoor heat exchanger, and a controller configured to control the compressor and the indoor fan. The controller is configured to run the compressor at a start of a cooling operation, start running the indoor fan at less than a set minimum wind velocity after a first set time has elapsed since the compressor started operating, run the indoor fan at the set minimum wind velocity after a second set time has elapsed since the indoor fan started operating at less than the set minimum wind velocity, and run the indoor fan at a set wind velocity after a third set time has elapsed since the indoor fan started operating at the set minimum wind velocity.

An air-conditioning apparatus having a refrigerant circuit, in which a compressor, an outdoor heat exchanger, an expansion device, and an indoor heat exchanger are connected by a pipe and refrigerant circulates in the pipe, includes an indoor fan configured to supply an indoor air to the indoor heat exchanger, and a controller configured to control the compressor and the indoor fan. The controller is configured to run the compressor at a start of a cooling operation, start running the indoor fan at less than a set minimum wind velocity after a first set time has elapsed since the compressor started operating, run the indoor fan at the set minimum wind velocity after a second set time has elapsed since the indoor fan started operating at less than the set minimum wind velocity, and run the indoor fan at a set wind velocity after a third set time has elapsed since the indoor fan started operating at the set minimum wind velocity.

There is presented a heating, ventilation and air conditioning (HVAC) system for conditioning air within a chamber, the system comprising: an inlet, an outlet, and a conditioning unit, the conditioning unit comprising a fan, and a heat exchanger configured to exchange heat with the air within the conditioning unit, wherein during operation, air is urged through conditioning unit by the fan such that heat is exchanged between the air and the heat exchanger, wherein the fan is configured to vary the flow rate of air urged through the conditioning unit to thereby control the amount of heat transferred between the air and the heat exchanger.

An environmental control system is provided and includes equipment to generate an environmental control effect, a damper associated with a zone to control a portion of the environmental control effect permitted to affect the zone by assuming one of various damper positions and a capacity controller operably coupled to the equipment and the damper to control operation of the equipment and to adjust the damper to assume the one of the various damper positions based on a demand of the zone and a capacity of the equipment.

An air treatment device includes: a treater configured to capture a toxic substance contained in target air; a regenerator configured to remove the toxic substance from the treater; a detector configured to detect an index correlated with a concentration of the toxic substance contained in room air; and a control unit configured to control the regenerator according to a detection value detected by the detector.

The present disclosure presents techniques for improving operational efficiency of climate control systems. A climate control system may include climate control equipment, a sensor that measures temperature in a building, and a control system that controls operation of the equipment using a first temperature schedule, which associates each time step with a temperature setpoint, when the building is occupied. When not occupied, the control system determines an expected return time based on historical occupancy data associated with the building, determines the temperature setpoint associated with the expected return time, determines candidate schedules each expected to result in the inside air temperature meeting the temperature setpoint, determines efficiency metrics each associated with one of the candidates based on historical performance data resulting from previous operation of the climate control system, and controls operation of the equipment based on a second temperature schedule selected from the candidates based on associated efficiency metrics.

The present disclosure presents techniques for improving operational efficiency of climate control systems. A climate control system may include climate control equipment, a sensor that measures temperature in a building, and a control system that controls operation of the equipment using a first temperature schedule, which associates each time step with a temperature setpoint, when the building is occupied. When not occupied, the control system determines an expected return time based on historical occupancy data associated with the building, determines the temperature setpoint associated with the expected return time, determines candidate schedules each expected to result in the inside air temperature meeting the temperature setpoint, determines efficiency metrics each associated with one of the candidates based on historical performance data resulting from previous operation of the climate control system, and controls operation of the equipment based on a second temperature schedule selected from the candidates based on associated efficiency metrics.

An air conditioner is provided. The air conditioner includes a heat exchange module, at least one humidity sensor, and a controller. The heat exchange module includes a compressor, a first heat exchanger, an expansion valve, a second heat exchanger, and an absorbent disposed on an outer surface of the first and second heat exchangers. The controller is configured to control to stop a normal operation and perform a drying operation for supplying air to any one of the first and second heat exchangers serving as an evaporator when it is determined that a predetermined drying operation condition is satisfied based on humidity information of air passed through the any one of the first and second heat exchangers serving as the evaporator, during the normal operation in which the any one of the first and second heat exchangers serves as an evaporator and the other serves as a condenser.

The invention relates to a process air dehumidification system (2) comprising a process air dehumidifier unit (4) comprising a moisture absorbing agent (6), the process air dehumidification system (2) further comprising a moisture absorbing agent regeneration system (8) comprising a closed regeneration air loop (10) arranged to pass through the process air dehumidifier unit (4) and comprising regeneration air flow generating means (12) for generating a regeneration air flow (14) in the closed regeneration air loop (10) and comprising a heat pump (16) comprising a condenser (18) and an evaporator (20) and a heat pump refrigerant (22), where the closed regeneration air loop (10) is arranged to pass through the condenser (18) and the evaporator (20) to exchange heat between regeneration air (24) and heat pump refrigerant (22), where the dehumidification system (2) comprises a complementary regeneration air moisture removal system (26) arranged downstreams of the evaporator (20) and upstreams of the condenser (18) and a regeneration air heat bypass system (28) arranged to exchange heat from inlet regeneration air (30) upstreams of the dehumidifier unit (4) and down-streams of the condenser (18) to outlet regeneration air (32) downstreams of the dehumidifier unit (4) and upstreams of the evaporator (20) and means (34) arranged to activate and deactivate the complementary regeneration air moisture removal system (26) and the regeneration air heat bypass system (28). The invention also relates to a method for dehumidification of process air.

The invention relates to a process air dehumidification system (2) comprising a process air dehumidifier unit (4) comprising a moisture absorbing agent (6), the process air dehumidification system (2) further comprising a moisture absorbing agent regeneration system (8) comprising a closed regeneration air loop (10) arranged to pass through the process air dehumidifier unit (4) and comprising regeneration air flow generating means (12) for generating a regeneration air flow (14) in the closed regeneration air loop (10) and comprising a heat pump (16) comprising a condenser (18) and an evaporator (20) and a heat pump refrigerant (22), where the closed regeneration air loop (10) is arranged to pass through the condenser (18) and the evaporator (20) to exchange heat between regeneration air (24) and heat pump refrigerant (22), where the dehumidification system (2) comprises a complementary regeneration air moisture removal system (26) arranged downstreams of the evaporator (20) and upstreams of the condenser (18) and a regeneration air heat bypass system (28) arranged to exchange heat from inlet regeneration air (30) upstreams of the dehumidifier unit (4) and down-streams of the condenser (18) to outlet regeneration air (32) downstreams of the dehumidifier unit (4) and upstreams of the evaporator (20) and means (34) arranged to activate and deactivate the complementary regeneration air moisture removal system (26) and the regeneration air heat bypass system (28). The invention also relates to a method for dehumidification of process air.