An air handler that provides for noise reduction without reducing the pressure of air supplied to a space below minimum levels. The air handler includes a plenum, which forms a passageway for air through the air handler; the plenum having a return side and a supply side, a fan positioned in the plenum to move air through the plenum, the fan having a suction side and a pressure side, and a conditioning apparatus in the plenum for conditioning air passing through the plenum. The air handler further includes a sound-attenuating panel, which has a first side and an opposed second side and is positioned in the plenum so that the panel extends at least partially across the plenum. The panel is configured and positioned to interact with the flow of air in the plenum to attenuate sound. The fan provides a pressure boost to air flowing through the plenum to counteract a pressure drop resulting from interaction between the air and the panel in the plenum and the conditioning apparatus.

In order to carry out, in a heating operation, an airflow rate adjusting operation in which a reduced amount of conditioned air is blown in one or more of a plurality of blowing directions to increase a blowing speed in the rest of the blowing directions, an operation control section is configured to control the flow of the conditioned air such that the conditioned air is blown out in a horizontal blow mode in the blowing direction in which the blowing speed is increased by the airflow rate adjusting operation, and periodically change the blowing direction in which a reduced amount of the conditioned air is blown. As a result, temperature variations in the air-conditioning target space in the heating operation are reduced.

A heated indoor cycling environment created by the use of infrared heat panels, a specific thermostat system including a high temperature range thermostat, remote sensors, a heating schedule, and a humidifying system is provided. The heated indoor cycling environment can be a heated room enclosed by a plurality of walls and at least one door. The thermostat system can include a heating and cooling system, two thermostats, two remote sensors, a plurality of infrared heating panels and an infrared heating panel thermostat. The thermostats, remote sensors and the plurality of infrared heating panels are installed within the heated room while the infrared heating panel thermostat is installed within a second room separate from the heated room. The infrared heating panel thermostat, the thermostats and the remote sensors provide information of air temperature of the heated room for controlling the heating and cooling system.

A control method for a multi-split air conditioning system capable of simultaneous cooling and heating to solve the problem that uneven cooling and heating occurs when running an existing multi-split air conditioning system. The method includes calculating the cooling or heating temperature effect deviation of each indoor unit on the basis of the indoor ambient temperature and set temperature of the environment where each indoor unit is located; calculating the total cooling effect deviation and total heating effect deviation of an multi-split air conditioning system on the basis of the horsepower of all the indoor units and the corresponding cooling temperature deviation or heating temperature deviation; and selectively adjusting the degrees of opening of valve boxes on the basis of the total cooling effect deviation and the total heating effect deviation. The method ensures balanced distribution of refrigerant, balanced running effects the units, and avoids uneven heating and cooling.

There is provided an air-conditioning system in which at least one or some of a plurality of air-conditioning apparatuses are each controllable such that the indoor temperature is maintained between two set temperatures. All the plurality of air-conditioning apparatuses are switched to either one of heating operation and cooling operation on the basis of a temperature difference between the indoor temperature related to an air-conditioning apparatus that is in the first operation mode and a set target temperature and a temperature difference between the indoor temperature related to an air-conditioning apparatuses that is in the second operation mode and an upper temperature limit or a lower temperature limit.

When an outdoor air handler performs a heating humidifying operation and an air conditioner performs a cooling operation, a control device adjusts at least one of a to-be-supplied air temperature of the outdoor air handler, a to-be-supplied air flow rate of the outdoor air handler, a to-be-supplied water flow rate of the outdoor air handler, and a cooling temperature that is a temperature at an air heat exchanger of the air conditioner. The control device adjusts the to-be-supplied air temperature and the cooling temperature on the basis of dehumidification information, operation information, temperature information, and humidity information. The operation information is information regarding an operating state of the air conditioner.

An example refrigeration system includes an indoor fluid loop, an outdoor fluid loop, and a heat exchanger assembly. The indoor fluid loop circulates a first working fluid. The outdoor fluid loop circulates a second working fluid that is different from the first working fluid and is separated from the indoor fluid loop by a wall of a structure. The heat exchanger assembly is mounted within the wall of the structure. The heat exchanger assembly includes a heat exchanger and a housing, where the heat exchanger is disposed within an internal space defined by the housing. The housing supports the heat exchanger within the internal space and is mounted to a structure of the wall.

In a heating main operation mode in which a load to be processed by the heating operation is dominant during cooling and heating mixed operation, an air-conditioning apparatus closes an opening and closing valve, and adjust the opening degree of an expansion device in accordance with the evaporating temperature of a load-side unit requesting cooling.

A first circulation channel connects a first heat demand part and first supply heat exchanger with its forward route and return route. Supply and discharge channels are connected to a first heat accumulation tank, which accommodates a second heat medium heated in the first supply heat exchanger and supplied via the supply channel. A heat accumulation switching valve changes over communication of the second heat medium serving as hot heat or cold heat flowing from the first supply heat exchanger and supplied to the first heat demand part without branching to the supply channel or branching to the supply channel and supplied to the first heat accumulation tank. A heat-accumulating hot-water-supplying air conditioner operates at a first temperature when the second heat medium from the first supply heat exchanger branches to the supply channel, and at a second lower temperature when the second heat medium does not branch to the supply channel.

The present invention relates to a disc-type air ecosystem box. The disc-type air ecosystem box includes a housing, and the housing is provided to accommodate a power module, a health processing module, a summer load module, a winter comfort module, a safety module, and an air supply module. The health processing module, the summer load module, the winter comfort module, and the safety module are located on the periphery of the power module, and the air supply module is located behind the power module. The present invention further discloses an air-conditioning method for said disc-type air ecosystem box.