A directional control valve including air connections for exhaust air, feed air, outside air and waste air; two respective functional connections of a heating path and a cooling path; a switching element that is configured to connect each of the air connections with exactly one of the functional connections so that the exhaust air is fed back through the heating path as the feed air in a heating position, and the exhaust air fed back through the cooling path as the intake air in a cooling position, and the outside air is fed through the heating path in a winter ventilation position as the feed air, and the outside air is fed through the cooling path in a summer ventilation position as the feed air.

The present invention provides a zero-emission dialysis clinic including a building envelope, daylight concept, lighting concept, mechanical ventilation (71), a chilled and heated ceiling (61) with capillary tubes (60), heat pump (50), and a photovoltaic system (80). Specifically, the present invention balances the energy consumption with energy generation by a photovoltaic system. The CO.sub.2 emissions are thus balanced and the building produces no net emissions.

A high-efficiency HVAC system and method of operation, for use in a house or building, having a plurality of components, including flexible, plastic duct tubing forming supply pipes that connect an air handler and a plurality of zones to deliver supply air to the zones and return pipes that connect the air handler and the zones to re-circulate return air; the air handler having a fan assembly powered by a variable blower motor to blow supply air to the zones; a heat pump having a variable compressor powered by a variable compressor motor to direct a working fluid to and from the air handler and a variable fan motor that rotates a fan blade within the heat pump; and a circuit control system for adjusting the variable compressor motor and the variable fan motor in the heat pump and the variable blower motor in the air handler.

A heating, ventilation, and air conditioning system in which a primary water loop is used as a heat transfer reservoir for both heating and cooling. A plurality of micro chillers are provided, with each micro chiller being connected to the primary water loop. Each micro chiller includes its own heat engine. Each micro chiller includes one or more fan coil units that exchange heat between the micro chiller and the air in a building. In a first mode a micro chiller transfers heat from the air in the building to the water circulating within the primary water loop. In a second mode the micro chiller transfers heat from the water circulating in the primary water loop to the air in the building. A primary water loop regulation system is provided to control the temperature of the water circulating in the primary water loop.

A humidification device is used in a vehicle air conditioner having a cooler disposed in an air conditioning case. The air conditioning case has a ventilation path leading air into a vehicle compartment. The humidification device has an adsorber that absorbs and desorbs moisture, a blower, a door that opens or closes an air flow path, and a controller. The controller switches the air flow path by controlling the door to set (i) a dehumidification mode in which air cooled by the cooler is led to the adsorber, and moisture in the air is adsorbed by the adsorber or (ii) a humidification mode in which air is led to the adsorber, the moisture is moved from the adsorber to the air to humidify the air, and the humidified air is blown toward an occupant.

An air conditioning system includes a heat pump section performing indoor air-warming by using a vapor-compression refrigeration cycle, a separate heat source section performing indoor air-warming by using a heat source separate from the heat pump section, and a control unit configured to control actions of the heat pump section and the separate heat source section. When an operation is switched from a separate heat source air-warming operation to a heat pump air-warming operation, the control unit starts the heat pump air-warming operation while the separate heat source air-warming operation is continued, and after an overlapping air-warming ending condition is met, the control unit ends the separate heat source air-warming operation. The overlapping air-warming ending condition is that a temperature difference resulting from subtracting a target indoor temperature from an indoor temperature is equal to or greater than an overlapping air-warming ending air temperature difference.

The present invention is a process of controlling a hybrid central air conditioning system that incorporates multiple air treatment devices operated by a process controller reacting to an input of either a comfort or an energy saving program and which uses temperature and humidity sensors that matches specific air treatment machines to varying air treatment needs, such as humidity control to maximize air conditioning performance while minimizing energy use. A timed test cycle is used to make corrections to the selected program based on a timed reading of the temperature and humidity sensors.

The present disclosure relates to an integrated control system for heat pump to optimize energy of solar power generation building, Including a computer comprising a processor and a memory within which a code for execution by the processor is stored, and the computer is configured to collect real-time data measured from at least any one of the heat pump of the solar power generation building, an external environment, a room and a photovoltaic power generation system, where interactions occur in a dynamic behavior of the heat pump; input the real-time data of before pre-set time into multiple dynamic behavior prediction models to derive an indoor air temperature prediction value, heat pump electricity consumption prediction value, and photovoltaic power generation prediction value, of after pre-set time; and search for an optimal control variable of the heat pump using the derived indoor air temperature prediction value, heat pump electricity consumption prediction value, and photovoltaic power generation prediction value.

A Variable Refrigerant Flow (VRF) dehumidification system. The system has at least one condenser module in fluid communication with one or more indoor air handlers. At least one evaporator coil is in fluid communication with the indoor air handlers and at least one reheat/reclaim coil. The evaporator and reheat/reclaim coils are also in communication with the condenser module. A plurality of electronic expansion valves (EEVs) are in fluid communication with the indoor air handlers. A plurality of sensors is disposed in the system and are in communication with at least one VRF dehumidification system controller. In one embodiment, a logic is stored in a non-transitory computer readable medium that, when executed by one or more processors, causes the VRF dehumidification system to monitor the data input from the plurality of sensors and regulates the capacity of the VRF dehumidification system needed to maintain a set dew point parameter.

A ventilation system including a ventilator and a processor. The ventilator includes a housing, first intake, second intake, first outlet, second outlet, dampers, first air blower, second air blower, total heat exchanger, and heat exchanger. The processor is configured to change the air flow path of air flowing through the housing from an intake flow path and discharge flow path while in a ventilation mode to a heat exchanger cleaning mode or a total heat exchanger drying mode, in which air in the room flows into the housing through the first outlet, passes through the heat exchanger and then the total heat exchanger, and is discharged to the space outside the room through the second outlet.