A method may include operating a switching circuit in an on state and an off state to actuate a flow of electrical power through a load when switched to the on state; monitoring an electrical property associated with the switching circuit; receiving an enable signal from a processor to power the load; providing a drive signal to the switching circuit to switch to the on state and power the load; determining if an electrical anomaly is present based on the monitored electrical properties; causing the switching circuit to switch to the off state if an electrical anomaly is detected; providing a fault signal to the processor; determining while the switching circuit is off, if the electrical anomaly has been corrected; and after the anomaly has been corrected, causing the switching circuit to switch to the on state.

An air-conditioning apparatus includes; a first heat source device configured to transfer heat to process air using as a heat source a vapor-compression refrigeration cycle; a second heat source device configured to transfer heat to the process air using an other heat source different from the vapor-compression refrigeration cycle; and a controller configured to control the first heat source device and the second heat source device. The controller deactivates the first heat source device and activates the second heat source device when, during a period in which the first heat source device is being operated to heat the process air, a temperature of the heated process air is kept at a target temperature and a parameter indicating an energy consumption of the first heat source device exceeds a first threshold value.

A method, system, apparatus, and/or device for preheating air for a rooftop air handling unit (RTU). The method, system, apparatus, and/or device may include a barrier system configured to surround the RTU. The barrier system may include a structure to provide a frame for the barrier system, a first barrier configured to connect to a first side of the structure, and a collector configured to connect to a second side of the structure. The method, system, apparatus, and/or device may include a duct configured to connect between the collector and a chamber. The method, system, apparatus, and/or device may include a chamber configured to connect to an air intake hood of the RTU. The chamber may include a first opening to receive air stored in the cavity, a second opening to receive external air, and a diverter configured to switch between a first position and a second position.

The invention discloses a method and apparatus for retrofitting air conditioning system using all-weather solar heating. In air conditioning system in which original single cold host is equipped with a cooling tower and a boiler, plate heat exchanger, solar collector plate, energy storage tank and circulating pipelines are provided. The cooling tower is used to absorb the heat in the winter air. The solar collector plate is used to absorb solar thermal heat and transfer to the plate heat exchanger. The single cold machine is used to absorb the heat of the antifreeze liquid. The plate heat exchanger is provided to form a secondary cycle so as to avoid icing risk of the antifreeze liquid. At the outdoor temperature more than five degrees, the indoor users is heated without operating the boiler, which maintains summer operation performance and meanwhile increases winter heating function without changing the original system.

An air heating and cooling system includes (1) a heat pump, illustratively devoid of auxiliary electric resistance type air heating structure, operative to provide refrigerant-based heating or cooling of air being delivered to a conditioned space, (2) a fuel-fired modular blower selectively operable to generate combustion heat, and (3) a control system associated with the heat pump and the modular blower. The control system has a heat pump thermostat electrically connected to a modular blower control and operative to transmit to the modular blower a first signal indicative of heating operation of the heat pump, and a second signal indicative of a need for alternative heat during a heating demand cycle. The modular blower is operative, in response to receiving both signals, to provide combustion-based air heating in place of refrigerant-based heat pump air heating.

An air handler configured with a plurality of air distribution modules, each including a fan, and at least one damper disposed within to provide and direct conditioned air or fresh air to respective multiple zones of a building.

An air conditioning and heat pump system includes a main heat exchange system, a heat distribution system and an energy efficient arrangement. The energy efficient arrangement includes a first energy saver heat exchanger connected to a first main heat exchanger and the second main heat exchanger of the main heat exchange system, a second pumping device connected to the first energy saver heat exchanger, and a pre-heating heat exchanger supported in the supporting frame at a positioned between a ventilating heat exchanging unit and an air intake opening of a ventilating device. The pre-heating heat exchanger is connected to the second pumping device and the first energy saver heat exchanger.

A method of monitoring or controlling electronic devices and monitoring enclosures in which the electronic devices are installed includes receiving data related to one or more electronic devices registered with a device management system and associated with a user account; and generating a user interface for monitoring or controlling the conditions from a computing device. The user interface may include an image of a first enclosure that is associated with the user account; images of first one or more electronic devices in the one or more electronic devices that are installed in the first enclosure; and current conditions displayed on each of the images of the first one or more electronic devices reflecting aspects of the first enclosure that are controlled or monitored by the first one or more electronic devices.

The integrated solar absorption heat pump system includes an absorption heat pump assembly (AHPA) having a generator, a condenser in fluid communication with the generator, an evaporator/absorber in fluid communication with the condenser and the generator, and a heat exchanger in communicating relation with the evaporator/absorber; a solar collector in fluid communication with the generator of the AHPA; a photovoltaic thermal collector in communicating relation with the evaporator/absorber of the AHPA; a plurality of pumps configured for pumping a fluid throughout the system to provide the desired heating or cooling; a power storage source, e.g., a solar battery, in communicating relation with the photovoltaic thermal collector; and a coil unit in communicating relation to the evaporator/absorber for receiving an air-stream. The absorption heat pump assembly can include an absorber and a solution heat exchanger.

An apparatus includes an evaporator-expansion module configured to (A) provide electric energy to a building structure, and (B) cooperate with an air-handler module configured to provide thermal energy to a building structure. The evaporator-expansion module includes an evaporator assembly including a heated fluid conduit, a refrigerant conduit, and a thermal buffer. The heated fluid conduit is configured to convey a heated fluid. The refrigerant conduit is configured to convey an evaporator refrigerant. The thermal buffer is configured to be positioned relative to the heated fluid conduit and the refrigerant conduit. This is done in such a way that the thermal buffer transfers thermal energy from the heated fluid that is positioned in the heated fluid conduit to the evaporator refrigerant that is positioned in the refrigerant conduit.