A condenser for a refrigerator according the present invention includes a heat exchange unit configured to receive at one side thereof refrigerant, which has been compressed in a compressor, to perform heat exchange between the refrigerant and air and to discharge the refrigerant, which has exchanged heat with the air, to an evaporator, wherein the heat exchange unit includes a flat tube, through one end of which the refrigerant is introduced and through a remaining end of which the refrigerant is discharged, thereby performing heat exchange between the refrigerant and the air, wherein the flat tube includes at least one bent tube portion defining plural rows of tubes, which are spaced apart from each other in an up-and-down direction, and wherein the plural rows of tubes define an intersection bent surface, which has a predetermined curvature and intersects the up-and-down direction.

A combustion apparatus has a burner including a burner body and a combustion plate, as well as a combustion box. A combustion plate flange part projects outward beyond an inner rim of a body flange part and beyond an inner rim of a combustion box flange part. The combustion box has, on a perimeter of one end, the combustion box flange part, adapted to be connected to the body flange part enclosing an open surface of the burner body. The combustion plate is provided with an inside projection which is erected, by bending, toward the body flange part so as to face the inner rim of the packing such that, in a state in which the combustion box flange part is connected to the body flange part, the outside projection and the inside projection are in contact with the body flange part.

A finless heat exchanger includes two headers and a plurality of heat transfer tubes spaced apart from each other and arranged side by side. The two headers each have a plurality of insertion holes, to which both ends of the heat transfer tubes are fitted and connected. The heat transfer tubes each include straight portions extending in a direction orthogonal to an arrangement direction, in which the heat transfer tubes are arranged, and turning portions. The straight portions and the turning portions are alternately and continuously arranged.

A heat exchanger includes: a plate-like fin having one end and an other end in a first direction; and a first heat transfer tube and a second heat transfer tube that each extends through the fin and that are adjacent to each other in a second direction. A portion to which the fin and the first heat transfer tube are connected and a clearance portion that separates between the fin and the first heat transfer tube are disposed between the fin and the first heat transfer tube. The clearance portion is disposed at one end side in the first direction relative to an imaginary center line that passes through a center of the first heat transfer tube in a long side direction and that extends along a short side direction.

A heat exchange unit including: a casing that includes a suction port on a side surface and a blow-out port on a top surface; a fan that faces the blow-out port in the casing and that feeds air into the casing through the suction port and discharges the air from the casing through the blow-out port; and a heat exchanger that is disposed below the fan in the casing and that causes a refrigerant to exchange heat with the air.

A heat exchanger according to an embodiment of the invention includes a fin extending in the gravity direction and heat transfer pipes installed so as to intersect the fin. The heat transfer pipes are arranged in the gravity direction. The fin has a water guiding area disposed above and below each of the heat transfer pipes, and a water drainage area disposed adjacent to a side of each of the heat transfer pipes. The water guiding area has water guiding structures for guiding water to the water drainage area. The water drainage area has water drainage structures for guiding water in the gravity direction.

In a heat exchanger, each of a plurality of heat exchange members includes: a main body portion including a heat transfer pipe; and extending portions provided to the main body. The extending portions extend from ends of the main body portion in a third direction. When a dimension of the main body portion in the third direction is represented by La, a dimension of the extending portions in the third direction is represented by Lf, a dimension of a wall thickness of each of the heat transfer pipes is represented by tp, and a thickness dimension of each of the extending portions is represented by Tf, relationships: Lf/La1 and Tftp are satisfied.

Provided is a water heater including a burner that receives a supply of combustion air from a fan, a heat exchanger having a heat transfer tube, and a combustion chamber case in which a combustion chamber of the burner is formed in the interior thereof and which is to be capable of guiding combustion gas generated by the burner to the heat exchanger. The water heater further includes a unit case that surrounds the combustion chamber case, and a region on the outside of the combustion chamber case within the unit case serves as an air pressure chamber having a higher pressure than the combustion chamber. Thus, combustion gas leakage to the outside can be prevented or suppressed appropriately by means of a simple configuration.

Various embodiments of the present disclosure provide a heat sink for a plug-in storage card and a plug-in storage card including the heat sink. The heat sink comprises a first part secured to a surface of the plug-in storage card and a second part coupled to the first part and being movable relative to the first part in a first direction, wherein the first direction is perpendicular to the surface of the plug-in storage card. In this way, when the second part and the first part have a larger overlap in the first direction, the heat sink has a smaller first height and when the second part and the first part have a smaller overlap in the first direction, the heat sink has a greater second height.

A heat exchanger includes: flat pipes arranged such that flat surfaces of the flat pipes are opposed to one another; and fins each including insertion parts that extend in an insertion direction that crosses a direction in which the flat pipes are disposed and a longitudinal direction of the flat pipes. At least part of each of the flat pipes is inserted into a corresponding one of the insertion parts. Each of the fins includes a cut-and-raised part that is cut and raised in a thickness direction between the insertion parts, and a rib disposed between the insertion part and the cut-and-raised part.