An air-conditioning apparatus, including: a heat source-side heat exchanger including a plurality of heat transfer tubes each having a flattened shape and being arranged in parallel, the heat source-side heat exchanger being used at least as a condenser of a refrigeration cycle; and an outdoor fan for generating flows of air passing through the heat source-side heat exchanger in a predetermined air velocity distribution. The heat source-side heat exchanger is configured to exchange heat between the air and refrigerant flowing through the heat transfer tubes and includes a plurality of refrigerant paths, each including at least one of the plurality of heat transfer tubes and a plurality of two-phase paths for allowing gas refrigerant to flow into and out as two-phase refrigerant; and a plurality of liquid-phase paths for allowing the two-phase refrigerant flowing out of the plurality of two-phase paths to flow out as subcooled liquid refrigerant.

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.

A heat exchanger including a heat transfer fin (1) having a heat-transfer-tube insertion hole (10) through which a heat transfer tube (40) is inserted, and a brazing material holding portion (100) provided above the heat-transfer-tube insertion hole (10) to hold a brazing material (4), wherein when the heat transfer tube (40) is inserted through the heat-transfer-tube insertion hole (10), left and right non-contact portions (15), (16) where a circumferential edge of the heat-transfer-tube insertion hole (10) and an outer circumferential surface of the heat transfer tube (40) are not in contact with each other are separately formed on an upper circumferential edge of the heat-transfer-tube insertion hole (10), and a brazing material guiding portion (100) extending toward the outer circumferential surface of the heat transfer tube (40) is formed between the left and right non-contact portions (15), (16).

A corrugated fin heat exchanger is provided in which the direction in which louvers are cut and raised is inclined in one direction only, and in which heat transfer performance is improved above that of conventional fins. To accomplish this, the relationship H>Qup/(Qup1)H is satisfied. H represents the core height of the heat exchanger, Qup represents the ratio of the amount of heat exchanged per corrugation between one-directional louver fins and multi-directional louver fins in an airflow part, and H represents the amount of increase in a heat transfer reduction region of a heat exchanger core as a result of changing from multi-directional louver fins to one-directional louver fins.

An apparatus for cooling liquids that includes a tank that has two longitudinal walls, two lateral walls and a top opening, and cooling flasks that each of has two longitudinal walls and two lateral walls. The cooling flasks are designed to be fixed inside the tank by attaching their lateral walls to the recesses that are match to each other. The cooling flasks are designed to be set within the tank in such a way that a gap smaller than 2.5 millimeters is formed between each two adjacent cooling flasks, creating a cooling space. The volume of the cooling flasks is three times greater or more than the volume of the cooling space. A user can pour hot water into the cooling space and a coolant material within the cooling flasks adsorbs heat from the hot water.

A method of manufacturing an air conditioning condenser including tubes, fin members and headers includes supplying a number of tubes corresponding to the total length of n condensers that are intended to be fabricated at one time, respectively disposing the fin members, which have been subjected to cladding treatment, between the tubes, respectively disposing pressing force retainers, which have not been subjected to cladding treatment, between unit tubes each including a predetermined number of tubes, temporarily coupling the headers to both ends of the tubes, brazing all of the components, removing the pressing force retainers from the unit tubes, and cutting the headers to a length corresponding to the length of each of the unit tubes.

A condenser for refrigerator includes left and right or upper and lower headers spaced apart from each other for introduction or discharge of refrigerant, a tube unit including tubes mounted between the headers and spaced apart from one another to allow the refrigerant to pass through the tubes, and a fin structure mounted in the respective neighboring tubes to perform heat exchange between the refrigerant passing through the tubes and outside air, the fin structure including fins having a greater width than a width of the tubes. Providing the fins with a greater width than that of the tubes may achieve an expanded heat exchange range and higher heat exchange efficiency. Moreover, wider gaps between the fins ensure smooth air movement, causing a reduced pressure difference of the moving air and neither dust nor debris is trapped between the fins, resulting in higher heat exchange efficiency.

A liquid-cooled heat sink includes a heat absorption module having a liquid storage container with one heat conductive side, a liquid inlet and a liquid; a liquid transport module including one inlet tube having a first end connected spatially with the liquid inlet of the storage container and a second end connected spatially with a pump unit, and an outlet tube having a first end connected spatially with the liquid outlet of the storage container and a second end connected spatially with a storage chamber; and a heat exchange module including a fin assembly, one connection passage extending through the fin assembly and one fan unit disposed on the fin assembly, which has two opposite ends respectively connected to the pump unit and the storage chamber, the connection passage having two opposite ends respectively connected to the pump unit and the liquid storage chamber.

Header plate for a heat exchanger, comprising a wall (3) provided with orifices (7), and through which tubes (1) arranged in rows in a longitudinal direction (L) are intended to pass, characterized in that: said wall has (3), in cross section, a profile made up of a central portion (13) and of two lateral portions (15), the lateral portions (15) overall follow a first curve with a first radius of curvature (R1), the central portion (13) overall follows a second curve with a second radius of curvature (R2), smaller than the first radius of curvature (R1).

Provided are an aluminum alloy brazing sheet for heat exchangers, which exhibits excellent formability and brazeability, and an advantageous process for producing the same. The aluminum alloy brazing sheet for heat exchangers according to the present invention is configured such that: the aluminum alloy composition of a core material and the aluminum alloy composition and temper of a filler material are respectively controlled; and a core material portion of the brazing sheet has a specific electric resistivity at room temperature and a specific dispersion ratio of second phase particles. The brazing sheet is configured to further exhibit certain properties in terms of a work hardening exponent (n-value) where a nominal strain is within a range of 1%-2% and in terms of a push-in depth when a penetration crack is generated in a punch stretch forming test using a round-head punch having a diameter of 50 mm.