A system and method for transporting cool fresh outside air into an occupied quarters which has an interface member, input connectors, output connectors, switches, and a microcontroller controllably coupled to the plurality of switches. When the thermostat controller system is operating during a heating period, the switches are closed by the microcontroller such that the thermostat controller system controls the operation of the remote air-handling unit that heats air provided to an occupied quarters. When the thermostat controller system is operating during a cooling period, the switches are opened by the microcontroller such that the thermostat controller system no longer controls the operation of the remote air-handling unit when a temperature of outside air is at least less than a cooling set point. The microcontroller operates a remote fan to draw the outside air into the occupied quarters when the outdoor air temperature is less than the cooling set point.

Provided is an artificial intelligence air conditioner for calibrating sensor data. The artificial intelligence air conditioner includes a sensor unit configured to acquire sensor data; a communication unit configured to receive at least one of external sensor data or environment information from at least one of an external air conditioner or an internet of things (IoT) device; and a processor. The processor is configured to generate estimated sensor data corresponding to the sensor unit using a sensor data estimation model, the received external sensor data and the received environment information, determine whether the acquired sensor data is abnormal using the generated estimated sensor data, perform an air conditioning function using the acquired sensor data if the acquired sensor data is determined as normal, and perform the air conditioning function using the generated estimated sensor data if the acquired sensor data is determined as abnormal.

A combination water heating, air conditioning refrigerant system is described. The combined system includes a plurality of independently adjustable electronic expansion valves. The expansion valves can independently modulate the delivery of high-temperature, high-pressure refrigerant to either a water heat exchanger or an outside condenser. A controller can receive input signals, including temperature signals from one or more temperature sensors that indicate the temperature at various locations of the system. The temperature signals include one or more of water temperature signals, ambient air temperature signals, or refrigerant super heat temperatures signals. In response to the input signals, the controller can output control signals to one or more of the plurality of electronic expansion valves.

Air conditioner units and methods of operating the same are provided. A method of operating an air conditioner unit includes determining a fan speed as a function of a compressor speed of a variable speed compressor of the air conditioner unit. The method also includes activating a variable speed fan of the air conditioner unit at the fan speed. An air conditioner unit may include a controller, and the controller may be configured for performing the method.

A method can include obtaining a set of images of a set of occupants located in an interior environment. The interior environment can have a first temperature. The method can include identifying, based on the set of images, a set of occupant characteristics corresponding to the set of occupants. The method can include obtaining a second temperature of an external environment. The method can include generating, by comparing the set of occupant characteristics to the second temperature, a discrepancy factor. The method can include determining that the discrepancy factor exceeds a threshold. The method can include initiating, in response to the determining that the discrepancy factor exceeds the threshold, a modification of the first temperature.

HVAC load can be shifted to change indoor temperature. A time series change in HVAC load data is used as input modified scenario values that represent an HVAC load shape. The HVAC load shape is selected to meet desired energy savings goals, such as reducing or flattening peak energy consumption load to reduce demand charges, moving HVAC consumption to take advantage of lower utility rates, or moving HVAC consumption to match PV production. Time series change in indoor temperature data can be calculated using only inputs of time series change in the time series HVAC load data combined with thermal mass, thermal conductivity, and HVAC efficiency. The approach is applicable for both winter and summer and can be applied when the building has an on-site renewable power system.

The cooling systems and methods of the present disclosure involve modular fluid coolers and chillers configured for optimal power and water use based on environmental conditions and client requirements. The fluid coolers include wet media, a first fluid circuit for distributing fluid across wet media, an air to fluid heat exchanger, and an air to refrigerant heat exchanger. The chillers, which are fluidly coupled to the fluid coolers via pipe cages, include a second fluid circuit in fluid communication with the air to fluid heat exchanger and a refrigerant circuit in thermal communication with the second fluid circuit and in fluid communication with the air to refrigerant heat exchanger. Pipe cages are coupled together to allow for expansion of the cooling system when additional cooling capacity is needed. The fluid coolers and chillers are configured to selectively operate in wet or dry free cooling mode, partial free cooling mode, or mechanical cooling mode.

A dual configuration ERV can be connected directly to an east facing wall or west facing wall without requiring unnecessary conduit to accommodate the different configurations. Ports 1 and 2 are interchangeable so that Port 1 can be configured as a outside air port or a return air port, and port 2 can be configured oppositely and similarly. Each of these ports has associated therewith a temperature sensor and a fan. A controller interrupts a fan when the temperature is below a predetermined value so thereby preventing or lessening frost buildup on the heat exchanger core.

Variable airflow energy efficient HVAC systems can be used to provide for a three duct air supply, a multi-zone air supply, and a two duct air supply. The systems include an air handling unit that defines a cooling circuit portion and an independent heating/bypass circuit portion. The two circuit portions may each have variable air dampers for admitting variable amounts of ambient and return air, and/or the cooling circuit portion and the heating/bypass circuit portion may each have an active cooling element. Corresponding methods are also disclosed.

This application provides an evaporative cooling unit. The evaporative cooling unit includes an outdoor channel, an indoor channel, and a heat exchange apparatus, and, further includes: an air filter and a defrosting apparatus that are disposed in the outdoor channel. The defrosting apparatus is located on a side that is of the air filter and that is close to an air intake vent of the outdoor channel. The defrosting apparatus includes a heat exchange film, and the heat exchange film has a first channel and a second channel that are arranged crosswise. The first channel communicates with the air intake vent of the outdoor channel, the second channel communicates with the indoor channel, and the first channel communicates with the second channel. The defrosting apparatus further includes a switch valve, and the switch valve is configured to control the second channel to communicate with the indoor channel.