Provided is an outdoor unit of an air conditioner capable of obtaining efficient air blowing performance by optimizing a length dimension of a heat exchanger and a relative position of a blower. A front end portion is disposed closer to the left side panel than a rotation shaft of the first blower, and a rear end portion is disposed closer to the right side panel than a rotation shaft of the first blower in the first heat exchanger, and a front end portion is disposed closer to the right side panel than a rotation shaft of the second blower, and a rear end portion is disposed closer to the left side panel than a rotation shaft of the second blower in the second heat exchanger.

Provided is an outdoor unit of an air conditioner which has good assembly stability by more cheaply and easily increasing mechanical strength of a housing, and in which the cost thereof is further suppressed by reducing the number of components such as screws, as an outdoor unit of a large air conditioner including two blowers. The left front pillar and the right front pillar are fixed between the front beam and the base panel hung between the front ends of the left side panel and the right side panel, and the rear pillar is fixed between the rear beam and the base panel hung between the rear ends of the left side panel and the right side panel. Therefore, the front beam and the rear beam are prevented from being distorted or bent, and thus mechanical strength of the entire housing is enhanced.

Provided is an outdoor unit of an air conditioner which has good assembly stability by more cheaply and easily increasing mechanical strength of a housing, and in which the cost thereof is further suppressed by reducing the number of components such as screws, as an outdoor unit of a large air conditioner including two blowers. The left front pillar and the right front pillar are fixed between the front beam and the base panel hung between the front ends of the left side panel and the right side panel, and the rear pillar is fixed between the rear beam and the base panel hung between the rear ends of the left side panel and the right side panel. Therefore, the front beam and the rear beam are prevented from being distorted or bent, and thus mechanical strength of the entire housing is enhanced.

A heat exchanger fixing structure, for two or more heat exchangers bent in multiple layers, includes two or more plates respectively fixed to one ends of the two or more heat exchangers, wherein portions of the two or more plates may overlap each other, and the two or more heat exchangers are connected and fixed to each other by fastening a fastening member to the overlapping portions.

A heat exchanger assembly includes a first heat exchanger plate and a second heat exchanger plate each include an outer boundary edge. The heat exchanger assembly also includes a service plate configured to be coupled to the outer boundary edge of each of the first and second heat exchanger plates. The service plate includes multiple sections coupled together to form a single plate, wherein each section of the multiple sections is configured to be individually removed to provide access to a space between the first and second exchanger plates.

A heat exchanger assembly includes a first heat exchanger plate and a second heat exchanger plate each include an outer boundary edge. The heat exchanger assembly also includes a service plate configured to be coupled to the outer boundary edge of each of the first and second heat exchanger plates. The service plate includes multiple sections coupled together to form a single plate, wherein each section of the multiple sections is configured to be individually removed to provide access to a space between the first and second exchanger plates.

A heat exchanger includes a refrigerant flow path into which a gas refrigerant flows from two gas-side inlets in the second row, that are positioned off from each other. Refrigerant flow paths from the two gas-side inlets converge in the one end portion. The refrigerant flow path connects to a heat-transfer pipe in the first row from the second row. The refrigerant flow path includes a refrigerant flow path which is formed in a range from the same stage as one of the gas-side inlets of the second row to the same stage as the other of the gas-side inlets of the second row, while being arranged along both ways between the one end portion and the other end portion in the first row, and the refrigerant flow path extends to a liquid-side outlet.

A heat exchanger includes a refrigerant flow path into which a gas refrigerant flows from two gas-side inlets in the second row, that are positioned off from each other. Refrigerant flow paths from the two gas-side inlets converge in the one end portion. The refrigerant flow path connects to a heat-transfer pipe in the first row from the second row. The refrigerant flow path includes a refrigerant flow path which is formed in a range from the same stage as one of the gas-side inlets of the second row to the same stage as the other of the gas-side inlets of the second row, while being arranged along both ways between the one end portion and the other end portion in the first row, and the refrigerant flow path extends to a liquid-side outlet.

A CPU 110 compares the extracted outside air temperature with a first low pressure saturation temperature. When the outside air temperature is lower than the first low pressure saturation temperature, the CPU 110 switches a first three-way valve 22 and a second three-way valve 23 so that a second outdoor heat exchanger 25 is used as a condenser and that a first outdoor heat exchanger 24 is not used. When the outside air temperature is higher than a second low pressure saturation temperature which is the first low pressure saturation temperature to which a predetermined temperature is added, the CPU 110 switches the first three-way valve 22 and the second three-way valve 23 so that the first outdoor heat exchanger 24 is used as a condenser and that the second outdoor heat exchanger 25 is not used.

An auxiliary mounting device and a mounting and use method for a saddle window air conditioner. The auxiliary mounting device comprises a base and a bolt. The base is located below a connection section of a saddle window air conditioner, and forms a certain distance away from the connection section. One end of the bolt is connected to the base, and the other end of the bolt passes through the connection section and is threadedly connected to the connection section. During mounting, the bolt is first screwed into the connection section from top to bottom, the lower end of the bolt is connected to the base, and the upper end of the bolt is threadedly connected to the connection section; then the saddle window air conditioner and the auxiliary mounting device are together moved up to a window, and the base is located on the window; then the bolt is screwed out from the connection section from bottom to top, the bolt and the connection section move towards each other, and the connection section gradually moves towards the direction close to the base, thereby implementing slow descending of the saddle window air conditioner. The auxiliary mounting device features a simple structure and is easy to operate.