An air conditioner includes an indoor unit, an outdoor unit, and a refrigerant pipe connecting the indoor unit and the outdoor unit to form a refrigerant circuit. The refrigerant pipe includes a flexible structure.

An HVAC system is provided. Embodiments of the present disclosure generally relate to heat exchangers having tubing with a reduced diameter compared to traditional systems. In one embodiment, a ducted HVAC system comprises an outdoor heat exchanger with tubing that has an outer diameter of eight millimeters (8 mm) or less and an indoor heat exchanger with tubing that has an outer diameter of nine millimeters (9 mm) or less. Additional systems, devices, and methods are also disclosed.

This invention discloses a low-noise cross-wall (“saddle” shaped) air conditioner window unit. The unit includes an indoors casing that houses the condenser and compressor and an outdoors casing that houses the evaporator. A connecting frame (which straddles the windowsill) connects the indoors and outdoors casings. In a first embodiment, an axial condenser fan and a centrifugal fan evaporator fan are driven simultaneously by a dual-axle motor housed in the outdoors casing. The axle driving the indoors evaporator fan extends through the connecting frame over the windowsill. In a second embodiment, the evaporator fan is a cross-flow fan. Both features are designed to make the unit lightweight and quiet indoors. The full specification discloses additional novel features such as venting patterns and perforated frames, also for making the unit lightweight, efficient, and/or quiet. Installation is enabled with spacers or fasteners, not requiring support brackets.

This invention discloses a low-noise cross-wall (“saddle” shaped) air conditioner window unit. The unit includes an indoors casing that houses the condenser and compressor and an outdoors casing that houses the evaporator. A connecting frame (which straddles the windowsill) connects the indoors and outdoors casings. In a first embodiment, an axial condenser fan and a centrifugal fan evaporator fan are driven simultaneously by a dual-axle motor housed in the outdoors casing. The axle driving the indoors evaporator fan extends through the connecting frame over the windowsill. In a second embodiment, the evaporator fan is a cross-flow fan. Both features are designed to make the unit lightweight and quiet indoors. The full specification discloses additional novel features such as venting patterns and perforated frames, also for making the unit lightweight, efficient, and/or quiet. Installation is enabled with spacers or fasteners, not requiring support brackets.

A system and method for heating and/or cooling at least one space uses a second heat transfer fluid which comprises or consists of water, at least one first encapsulated phase change material and at least one second encapsulated phase change material, wherein the first phase change material has a phase change temperature which is lower than the phase change temperature of the second phase change material. At least two indoor heat exchangers are employed, wherein each of the at least two indoor heat exchangers has a temperature sensor configured to determine a temperature information of the indoor space in which the indoor heat exchanger is located. A controller is employed which receives a temperature information from the temperature sensors and controls the system based on said temperature information. The system and method show an improved efficiency in heating and/or cooling at least one space compared to known systems and methods.

A heating, ventilation, and air conditioning (HVAC) system includes a controller associated with a residence. The controller is configured to determine an expected value range for an operating parameter of a component of the HVAC system. Additionally, the controller is configured to receive a signal from a sensor indicative of a current value of the operating parameter of the component and determine if the current value of the operating parameter is outside the expected value range. Based on the determination that the current value is outside the expected value range, the controller is additionally configured to initiate a diagnostic mode of the controller. In the diagnostic mode, the controller is configured to collect diagnostic data associated with the HVAC system.

A controller for a building control system includes processors and memory storing instructions that, when executed by the processors, cause the processors to perform operations including identifying zones within a building, analyzing data associated with the zones, and generating zone groupings based on the data associated with the zones. Each of the zone groupings define zone groups and specify which of the zones are grouped together to form each of the zone groups. The operations also include identifying a particular zone grouping from zone groupings based on the data associated with zones and using the particular zone grouping to generate control signals to operate equipment of the building control system to provide heating or cooling to the zones.

The present disclosure relates to a method of predicting air conditioning load based on room temperature and an air conditioner implementing the method, the air conditioner according to one embodiment may include a sensor configured to sense a room temperature or humidity in a suspended section in which an air discharge part is not operated; and a central controller implemented to control the air discharge part and an outdoor unit based on operation mode information that is calculated from a value sensed by the sensor, when the air discharge part and the outdoor unit are switched on.

A communication circuit for indoor and outdoor units of an air conditioner and an air conditioner. The circuit includes an outdoor unit sending module, an outdoor unit receiving module, an indoor unit receiving module, an indoor unit sending module, a weak electricity grounding end and a voltage regulation rectifying circuit, wherein the voltage regulation rectifying circuit, the outdoor unit receiving module, the outdoor unit sending module, the indoor unit receiving module, the indoor unit sending module and the weak electricity grounding end are sequentially connected in series to form a loop; the voltage regulation rectifying circuit is configured to convert alternating current of a main control board of an indoor unit into direct current, and supply electricity to the loop.

A communication circuit for indoor and outdoor units of an air conditioner and an air conditioner. The circuit includes an outdoor unit sending module, an outdoor unit receiving module, an indoor unit receiving module, an indoor unit sending module, a weak electricity grounding end and a voltage regulation rectifying circuit, wherein the voltage regulation rectifying circuit, the outdoor unit receiving module, the outdoor unit sending module, the indoor unit receiving module, the indoor unit sending module and the weak electricity grounding end are sequentially connected in series to form a loop; the voltage regulation rectifying circuit is configured to convert alternating current of a main control board of an indoor unit into direct current, and supply electricity to the loop.