An outdoor unit of an air-conditioning apparatus has a structure that enables a terminal block to be added on a front side that a worker can easily contact, without greatly changing the location of an existing terminal block and the basic shape of a mounting portion. In a casing of the outdoor unit, a heat exchanger, an outdoor fan, a compressor, and an electrical component are provided. The outdoor unit includes: terminal blocks to be connected to the electrical component; and a terminal-block mounting portion facing from the inside of the casing toward the outside thereof. The terminal blocks are arranged in the height direction of the terminal-block mounting portion, and include first and second terminal blocks on a lower side and an upper side, respectively. The second terminal block is mounted on a terminal-block seat on the terminal-block mounting portion. The above seat includes a mounting portion on which the second terminal block is mounted, and a fixed portion contacting the terminal-block mounting portion. The fixed portion is smaller than the mounting portion, and the mounting portion protrudes from the fixed portion toward the first terminal block.

A fall prevention structure of an electric component cover in a refrigeration cycle apparatus includes an electric component box housing an electric component of a refrigeration cycle apparatus. The electric component box includes a casing, a side of which is open, and an electric component cover configured to cover, in an upright position, an opening of the casing and to be screwed to the casing. The electric component cover includes a catch including a backward-extending portion and an upward-extending portion. The backward-extending portion extends backward from an upper end portion of the electric component cover. The upward-extending portion extends upward from an end portion of the backward-extending portion. In a state in which the electric component cover is screwed to the casing, the catch is inserted into an insertion slot disposed in a portion extending in an up-down direction of the casing. When the electric component cover is unscrewed from the casing, the electric component cover does not fall from the casing by the catch being caught by a portion above the insertion slot.

Apparatuses, systems, and methods for providing non-expert installation of HVAC systems are provided. The HVAC system includes an indoor unit, an outdoor unit, a first pre-charged refrigerant line-set, a second pre-charged refrigerant line-set, and a line-set coupler, each containing pre-pressurized refrigerant securely positioned therein prior to engagement between two or more of the aforementioned elements. The first pre-charged refrigerant line-set is couplable between an indoor unit refrigerant port of the indoor unit and a first coupler end of the line-set coupler. The second pre-charged refrigerant line-set is couplable between an outdoor unit refrigerant pot of the outdoor unit and a second coupler end of the line-set coupler.

Apparatuses, systems, and methods for providing non-expert installation of HVAC systems are provided. The HVAC system includes an indoor unit, an outdoor unit, a first pre-charged refrigerant line-set, a second pre-charged refrigerant line-set, and a line-set coupler, each containing pre-pressurized refrigerant securely positioned therein prior to engagement between two or more of the aforementioned elements. The first pre-charged refrigerant line-set is couplable between an indoor unit refrigerant port of the indoor unit and a first coupler end of the line-set coupler. The second pre-charged refrigerant line-set is couplable between an outdoor unit refrigerant pot of the outdoor unit and a second coupler end of the line-set coupler.

Apparatuses, systems, and methods for providing non-expert installation of HVAC systems are provided. The HVAC system includes an indoor unit, an outdoor unit, a first pre-charged refrigerant line-set, a second pre-charged refrigerant line-set, and a line-set coupler, each containing pre-pressurized refrigerant securely positioned therein prior to engagement between two or more of the aforementioned elements. The first pre-charged refrigerant line-set is couplable between an indoor unit refrigerant port of the indoor unit and a first coupler end of the line-set coupler. The second pre-charged refrigerant line-set is couplable between an outdoor unit refrigerant pot of the outdoor unit and a second coupler end of the line-set coupler.

An outdoor unit for a building HVAC system includes one or more sensors configured to measure temperature and pressure values. The unit also includes a user interface coupled to the outdoor unit. The user interface is configured to display information to a user. The unit includes a controller including a processing circuit. The processing circuit configured to record the temperature values and the pressure values via the sensors and cause the user interface to display temperature values and pressure values.

An outdoor unit for a building HVAC system includes one or more sensors configured to measure temperature and pressure values. The unit also includes a user interface coupled to the outdoor unit. The user interface is configured to display information to a user. The unit includes a controller including a processing circuit. The processing circuit configured to record the temperature values and the pressure values via the sensors and cause the user interface to display temperature values and pressure values.

An outdoor unit includes a housing having a front surface formed with an outlet and a back surface facing the front surface, an airflow flowing through the outlet; a substrate horizontally placed in the housing, an electric component being mounted on the substrate; and a heat dissipator including a plurality of fins, each of the fins having a heat dissipation surface, the heat dissipator dissipating, due to the airflow, heat generated by the electric component. The heat dissipation surface of each of the fins is parallel to the back surface or is angled at greater than 0 degrees and less than 90 degrees relative to the back surface in top view.

A motor includes a stator having a yoke having an annular shape about an axis line, and a first tooth and a second tooth extending from the yoke toward an inner or outer peripheral side, and a rotor rotatable about the axis line. The rotor has a permanent magnet on a surface facing the stator. Each of the first tooth and the second tooth includes an end portion facing the permanent magnet. The permanent magnet has a first magnetic pole and a second magnetic pole adjacent in a circumferential direction about the axis line, and a groove formed in an inter-pole portion between the first magnetic pole and the second magnetic pole. An interval L1 in the circumferential direction between the end portion of the first tooth and the end portion of the second tooth, and a width L2 of the groove satisfy 1.00<L2/L13.75.

A motor driving device that converts alternating-current power to direct-current power and drives a motor, the motor driving device including a printed circuit board having a first plate surface and a second plate surface, having an inverter module and an inverter module provided on the first plate surface, having a first power pattern provided on the second plate surface and connected to the inverter module, having a second power pattern provided on the second plate surface and connected to the inverter module, and having a jumper portion to connect the first power pattern and the second power pattern. A cross-sectional area of the jumper portion is larger than a cross-sectional area of the first power pattern or the second power pattern.