A chilling unit includes: air heat exchangers each including heat transfer tubes and fins; and a machine room unit on which the air heat exchangers are provided. The air heat exchangers each have a long-side portion that extends in a longitudinal direction of the machine room unit. The air heat exchangers includes a pair of air heat exchangers that are inclined such that a spacing between upper end portions of the heat exchangers is greater than a spacing between lower end portions thereof. In each pair, the long-side portion of at least one air heat exchanger has a heat-exchanger end portion located at a unit end portion of the machine room unit in the longitudinal direction, and from the heat-exchanger end portion, heat transfer tubes that protrudes from an outermost one of the fins in an arrangement direction thereof and that extend linearly in the lateral direction do not extend.

A chilling unit includes a machine room unit to accommodate a compressor and a heat exchanger, and a plurality of air heat exchangers placed on top of the machine room unit. The air heat exchangers include a pair of air heat exchangers including two air heat exchangers opposite to each other in a lateral direction. They are inclined such that respective upper end portions of the two air heat exchangers have a spacing between each other greater than a spacing between respective lower end portions of the two air heat exchangers. In the lateral direction, the machine room unit has a top width greater than a heat-exchanger bottom width, the top width is one between side walls in a top face portion of the machine room unit, the bottom width is defined as a width between outer side faces of the respective lower end portions of the two air heat exchangers.

A chilling unit includes a machine room unit to accommodate a compressor and a heat exchanger, and a plurality of air heat exchangers placed on top of the machine room unit. The air heat exchangers include a pair of air heat exchangers including two air heat exchangers opposite to each other in a lateral direction. They are inclined such that respective upper end portions of the two air heat exchangers have a spacing between each other greater than a spacing between respective lower end portions of the two air heat exchangers. In the lateral direction, the machine room unit has a top width greater than a heat-exchanger bottom width, the top width is one between side walls in a top face portion of the machine room unit, the bottom width is defined as a width between outer side faces of the respective lower end portions of the two air heat exchangers.

The present disclosure provides an air conditioner outdoor unit that includes: a motor having first and second output shafts; a first-stage fan blade connected to the first output shaft; a second-stage fan blade connected to the second output shaft. The motor is configured to drive the first-stage and second-stage fan blades to rotate, and rotation directions of the first-stage and second-stage fan blades are opposite. The motor is located between the first-stage and second-stage fan blades, or on the same side of the first-stage and second-stage fan blades. The outdoor unit is provided with a motor, and first-stage and second-stage fan blades, so that the motor drives the first-stage fan blade to rotate through the first output shaft, and drives the second-stage fan blade to rotate in the opposite direction through the second output shaft. By recovering the rotational energy of the airflow, higher wind pressure is achieved.

Outdoor units for climate control systems and related methods are disclosed. In an embodiment, the outdoor unit includes a base pan including an upper surface, a lower surface opposite the upper surface, and at least one receptacle, wherein the at least one receptacle comprises an aperture. Additionally, the outdoor unit includes at least one coil locator coupled to the at least one receptacle of the base pan wherein the at least one coil locator comprises a tongue which extends through the aperture and a pair of horizontally spaced feet separate and distinct from the tongue and which are received in the aperture. Further, the outdoor unit includes a heat exchanger coil, and an outdoor fan configured to produce an airflow across the heat exchanger coil.

Outdoor units for climate control systems and related methods are disclosed. In an embodiment, the outdoor unit includes a base pan including an upper surface, a lower surface opposite the upper surface, and at least one receptacle, wherein the at least one receptacle comprises an aperture. Additionally, the outdoor unit includes at least one coil locator coupled to the at least one receptacle of the base pan wherein the at least one coil locator comprises a tongue which extends through the aperture and a pair of horizontally spaced feet separate and distinct from the tongue and which are received in the aperture. Further, the outdoor unit includes a heat exchanger coil, and an outdoor fan configured to produce an airflow across the heat exchanger coil.

An outdoor unit for a central air conditioner and a central air conditioner having the same are provided. The outdoor unit includes a unit body and at least One panel. One side of the unit body is open, and the panel is arranged on the side of the unit body to open and close the unit body. One end of the panel is pivotally and detachably connected to the unit body through a pivot structure. The pivot structure includes a base provided on the unit body and a pivot seat provided on the panel. A top of the base has a pivot shaft spaced apart from the unit body and extending upward, and the pivot seat is provided with a pivot hole having an open bottom and configured to be detachably fitted with the pivot shaft.

An impeller includes a boss provided on a rotation axis and a blade provided on an outer circumferential side of the boss. The blade has a radially middle portion that is located midway between an outer circumferential edge and an inner circumferential edge in a radial direction of the blade from the rotation axis. A span-direction section of part of the blade that adjoins the leading edge is shaped such that part of a suction side of the blade that is located in an area between the radially middle portion and the outer circumferential edge is concave, and a span-direction section of part of the blade that adjoins the trailing edge is shaped such that part of the suction side of the blade that is located in the area between the radially middle portion and the outer circumferential edge is convex.

A heat exchanger system includes a heat exchanger coil, a base of a foam structure including a clamp with a first arm and a second arm, where the first arm and the second arm are configured to exert a clamping force against the heat exchanger coil, and a vertical member of the foam substructure coupled to the base and abutting a cover of the heat exchanger system, where the base and the vertical member are configured to block air flowing through the heat exchanger from flowing into a void between the heat exchanger coil and the cover.

A heat exchanger system includes a heat exchanger coil, a base of a foam structure including a clamp with a first arm and a second arm, where the first arm and the second arm are configured to exert a clamping force against the heat exchanger coil, and a vertical member of the foam substructure coupled to the base and abutting a cover of the heat exchanger system, where the base and the vertical member are configured to block air flowing through the heat exchanger from flowing into a void between the heat exchanger coil and the cover.