Abstract: An un-finned heat exchanger (100). The heat exchanger (100) comprises: a heat exchange tube (1), which comprises a body; a fluid channel (11) formed inside the body; and a collecting tube (2) connected to the heat exchange tube (1). Using the heat exchanger can reduce accumulation of dirt on the heat exchanger.

Abstract: An un-finned heat exchanger (100). The heat exchanger (100) comprises: a heat exchange tube (1), which comprises a body; a fluid channel (11) formed inside the body; and a collecting tube (2) connected to the heat exchange tube (1). Using the heat exchanger can reduce accumulation of dirt on the heat exchanger.

Abstract: An un-finned heat exchanger (100). The heat exchanger (100) comprises: a heat exchange tube (1), which comprises a body; a fluid channel (11) formed inside the body; and a collecting tube (2) connected to the heat exchange tube (1). Using the heat exchanger can reduce accumulation of dirt on the heat exchanger.

Abstract: An un-finned heat exchanger (100). The heat exchanger (100) comprises: a heat exchange tube (1), which comprises a body; a fluid channel (11) formed inside the body; and a collecting tube (2) connected to the heat exchange tube (1). Using the heat exchanger can reduce accumulation of dirt on the heat exchanger.

Abstract: The present disclosure is directed to a method of making a heat exchanger tube, such as multichannel tubes. The heat exchanger tube may include a plurality of generally parallel flow paths extending between opposite ends. The method may include removing a section of an outer wall along the length of the tube to expose at least some of the plurality of generally parallel flow paths.

Abstract: Disclosed are a fin (1) for a heat exchanger, and a heat exchanger having the fin (1). The fin (1) comprises a fin body (10) in a waveform structure formed by boards, wherein the fin body (10) has two first side surfaces (11) which are opposite one another in a first direction, two second side surfaces (12) which are opposite one another in a second direction, and wave crests and wave troughs, which are on the second side surfaces (12); and the first direction and the second direction intersect. The fin body (10) comprises: a first concave portion (13), wherein the first concave portion (13) is formed in the fin body (10), and is located on the two first side surfaces (11) of the fin body (10). The fin (1) and the heat exchanger are manufactured more simply. Since the connection portions between the wave crests and wave troughs of the fin (1) are approximately perpendicular to a heat exchange tube (2), the condensed water is more easily discharged.

Abstract: A heat pump system is provided that includes a flow directing system that allows an outdoor heat exchanger to be switchable between a single-pass arrangement and a two-pass arrangement. The heat pump system includes an outdoor heat exchanger, an indoor heat exchanger, and a flow directing system of check valves and piping segments that enable switching of the outdoor heat exchanger between the single-pass and the two-pass arrangement. The outdoor heat exchanger is operable as a two-pass condenser in the cooling mode and as a single-pass evaporator in the heating mode.

Abstract: Disclosed are a fin (1) for a heat exchanger, and a heat exchanger having the fin (1). The fin (1) comprises a fin body (10) in a waveform structure formed by boards, wherein the fin body (10) has two first side surfaces (11) which are opposite one another in a first direction, two second side surfaces (12) which are opposite one another in a second direction, and wave crests and wave troughs, which are on the second side surfaces (12); and the first direction and the second direction intersect. The fin body (10) comprises: a first concave portion (13), wherein the first concave portion (13) is formed in the fin body (10), and is located on the two first side surfaces (11) of the fin body (10). The fin (1) and the heat exchanger are manufactured more simply. Since the connection portions between the wave crests and wave troughs of the fin (1) are approximately perpendicular to a heat exchange tube (2), the condensed water is more easily discharged.

Abstract: Disclosed is a collecting pipe (1), comprising: an axially extending inner chamber (20), the inner chamber (20) comprising a refrigerant inlet chamber (18) and a refrigerant distribution chamber (19), the refrigerant inlet chamber (18) and refrigerant distribution chamber (19) being separated from each other and in fluid communication with each other, a refrigerant entering the refrigerant inlet chamber (18) and being distributed to heat exchange tubes (2) at the refrigerant distribution chamber (19); and a plurality of axially extending individual components (11, 12), wherein the refrigerant inlet chamber (18) and the refrigerant distribution chamber (19) are formed by successively placing and connecting the plurality of axially extending individual components (11, 12) in an assembling direction perpendicular to the axial direction. The collecting pipe (1) is composed of the plurality of individual components (11, 12).

Abstract: Disclosed is a heat exchanger (100), comprising a heat exchange tube (10), fins (20) and rings (30), wherein the fin (20) comprises a tubular part (21), and the ring (30) is used for fastening the tubular part (21) onto the heat exchange tube (10). A pressure is exerted in an axial direction of the heat exchange tube (10) on the tubular parts (21) of fins (20) and the rings (30) which are alternately sheathed onto the heat exchange tube (10), so as to fit the tubular part (21) together with the ring (30) in such a way that one is sheathed onto the other, thereby fixing the tubular parts (21) of the fins (20) onto the heat exchange tube (10). When the diameter of the heat exchange tube is relatively small, the tube expansion technique cannot be used for the connection of the heat exchange tube and the fins, and the heat exchanger (100) can avoid the complicated soldering process, thereby improving the product quality, and reducing the manufacturing costs of the product and the equipment investment.

Abstract: The present disclosure is directed to heat exchangers with flow distribution manifolds divided into an inlet section and a distribution section by a distributor. The inlet section may have a relatively small cross-sectional area that promotes mixed phase flow of liquid and vapor refrigerant. The manifolds may be used with multichannel tubes with flow path inlet sections that allow refrigerant to enter the flow paths through an outer wall of the tubes. In certain embodiments, a portion of the outer wall is removed to expose the flow paths to a distribution chamber within the inlet manifold. The multichannel tubes extend into the distribution section to partition the distribution section into a series of distribution chambers defined by a pair of adjacent tubes, the distributor, and the inlet manifold. Within each distribution chamber, the refrigerant may be directed into the multichannel tubes through the inlet sections of the multichannel tubes.

Abstract: The present disclosure is directed to a method of making a heat exchanger tube, such as multichannel tubes. The heat exchanger tube may include a plurality of generally parallel flow paths extending between opposite ends. The method may include removing a section of an outer wall along the length of the tube to expose at least some of the plurality of generally parallel flow paths.

Abstract: The present disclosure is directed to multichannel tubes with flow path inlet sections that allow refrigerant to enter the flow paths through an outer wall of the multichannel tubes. In certain embodiments, a portion of the outer wall is removed to expose the flow paths to a distribution chamber within an inlet manifold divided into an inlet section and a distribution section by a distributor. According to certain embodiments, the inlet section may be designed to have a relatively small cross-sectional area that promotes mixed phase flow of liquid and vapor refrigerant. The multichannel tubes extend into the distribution section to partition the distribution section into a series of distribution chambers defined by a pair of adjacent tubes, the distributor, and the inlet manifold. Within each distribution chamber, the refrigerant may be directed into the multichannel tubes through the flow path inlet sections of the multichannel tubes.

Abstract: A heat pump system is provided that includes a flow directing system that allows an outdoor heat exchanger to be switchable between a single-pass arrangement and a two-pass arrangement. The heat pump system includes an outdoor heat exchanger, an indoor heat exchanger, and a flow directing system of check valves and piping segments that enable switching of the outdoor heat exchanger between the single-pass and the two-pass arrangement. The outdoor heat exchanger is operable as a two-pass condenser in the cooling mode and as a single-pass evaporator in the heating mode.

Abstract: A heating, ventilation, air conditioning and refrigeration (HVAC&R) system having a compressor, a heat exchanger, an expansion device, and a multichannel heat exchanger connected in a closed refrigerant loop. The HVAC&R system may also have a base, a retainer and/or a grommet for providing support to the multichannel heat exchanger and/or substantially isolating the multichannel heat exchanger from the base.

Abstract: Heating, ventilation, air conditioning, and refrigeration (HVAC&R) systems and heat exchangers are provided which include manifold configurations designed to promote mixing of vapor phase and liquid phase refrigerant. The manifolds contain flow mixers such as a helical tape, sectioned volumes, and partitions containing apertures. The flow mixers direct the flow of refrigerant within the manifold to promote a more homogenous distribution of fluid within the multichannel tubes.

Abstract: The present disclosure is directed to multichannel tubes that can be expanded to assemble the multichannel tubes within plate fin heat exchangers. The multichannel tubes each include several generally parallel flow paths, which are separated from one another by deformable webs slanted in a common direction across a width of the multichannel tubes. The webs may deform upon expansion of the tubes with a high pressure fluid. During expansion, the webs may stretch, shift positions, and/or change shape to allow the outer dimensions of the tube to increase. The multichannel tubes may be designed to expand to fill openings of plate fins, creating an interference fit between the multichannel tubes and the plate fins.

Abstract: The present disclosure is directed to multichannel tubes with flow path inlet sections that allow refrigerant to enter the flow paths through an outer wall of the multichannel tubes. In certain embodiments, a portion of the outer wall is removed to expose the flow paths to a distribution chamber within an inlet manifold divided into an inlet section and a distribution section by a distributor. According to certain embodiments, the inlet section may be designed to have a relatively small cross-sectional area that promotes mixed phase flow of liquid and vapor refrigerant. The multichannel tubes extend into the distribution section to partition the distribution section into a series of distribution chambers defined by a pair of adjacent tubes, the distributor, and the inlet manifold. Within each distribution chamber, the refrigerant may be directed into the multichannel tubes through the flow path inlet sections of the multichannel tubes.

Abstract: The present disclosure is directed to heat exchangers with flow distribution manifolds divided into an inlet section and a distribution section by a distributor. The inlet section may have a relatively small cross-sectional area that promotes mixed phase flow of liquid and vapor refrigerant. The manifolds may be used with multichannel tubes with flow path inlet sections that allow refrigerant to enter the flow paths through an outer wall of the tubes. In certain embodiments, a portion of the outer wall is removed to expose the flow paths to a distribution chamber within the inlet manifold. The multichannel tubes extend into the distribution section to partition the distribution section into a series of distribution chambers defined by a pair of adjacent tubes, the distributor, and the inlet manifold. Within each distribution chamber, the refrigerant may be directed into the multichannel tubes through the inlet sections of the multichannel tubes.

Abstract: An HVAC system and method for configuring a controller to control a compressor including a detection system provided to determine a type of compressor. The detection system includes a processor; and a load sensing circuit connected between the processor and a controller. The controller has a plurality of output connections connectable to a compressor. The load sensing circuit senses whether a load is present on each output connection of the plurality of output connections and provides a load signal to the processor indicating whether a load is present on each output connection. The load signals are processed with the processor to determine the type of compressor is present. The controller is configured to control the compressor in response to the determined type of compressor.