摘要:
In a heat exchanger, each of flat tubes (31) has an end portion inserted in a header-collecting pipe (70). When the heat exchanger functions as an evaporator, a refrigerant in a gas-liquid two-phase state upwardly flows in a subspace (71 a) located in the header-collecting pipe (70). An effective cross-sectional area A of the subspace (71 a) in the header-collecting pipe (70) is set based on a mass flow rate of the refrigerant flowing into the subspace (71a) in the header-collecting pipe (70). The effective cross-sectional area A is obtained by subtracting a projected area A 1 which corresponds to a portion of each flat tube (31) located in the subspace (71a) and is projected onto a plane perpendicular to an axial direction of the header-collecting pipe (70) from an area A 0 of a cross section of the subspace (71 a) which is perpendicular to the axial direction of the header-collecting pipe (70).
摘要:
A heating element cover component 13a includes an outer shell portion 131a of a required length with a space 132, having required rigidity and thermal conductivity, a substantially half-pipe shaped abutting portion 134a formed with a required thickness at a required site of the outside of the outer shell portion 131a in parallel with a longitudinal direction of the outer shell portion 131a, having flexibility and thermal conductivity, and with a slit 135a penetrating in a thickness direction formed over the entire length in parallel with the longitudinal direction, a connecting portion 136 having flexibility and thermal conductivity, connecting opposed edges of the abutting portion 134a parallel to the longitudinal direction with the outer shell portion 131a, and an engaging portion constituted with a projecting piece 138a and a projecting piece inserting portion 140a being engaging elements that are disposed at line-symmetrical positions using a longitudinal straight line located at a widthwise middle of the abutting portion 134a as an axis of symmetry to form a pair structured to be engageable with each other.
摘要:
A heat receiving structure and a heat sink that can ensure a sufficient contact area between a heat pipe and a heat receiving member, and are high in strength are provided. The heat receiving structure includes heat receiving blocks 7 and 8 that have concave inner faces 7A and 8A along an external shape 3A of a heat pipe 3, in which extended portions 11 and 12 at both sides that continue to the inner faces 7A and 8A extend inward in a radial direction of the heat pipe 3 while covering the heat pipe 3, and the heat pipe 3 is sandwiched by the heat receiving blocks 7 and 8 from both sides and joined.
摘要:
A plate fin heat exchanger 1 includes a corrugated fin 3 and tube plates 2. An intermediate portion 33 of the corrugated fin between crest and trough portion 31 and 32 thereof has a plurality of protruding ribs 34 protruding beyond a surface of the corrugated fin and arranged in a first direction. Surfaces of the crest and trough portions being in contact with the tube plates are configured as contact surfaces 310, 320 with no protruding rib. Gently sloping portions 341 are provided between the protruding ribs and the contact surfaces of the crest and trough portions to gradually protrude from the surface of the corrugated fin with increasing distance from the contact surfaces, and are continuous with the protruding ribs.
摘要:
A fin-tube heat exchanger includes a plurality of fins 1 for forming flow paths of a gas therebetween and a heat-transfer tube 21 extending through the plurality of fins to allow a fluid to flow therethrough for heat exchange with the gas. Each of the fins includes a plurality of first inclined portions 6 that incline with respect to a direction of airflow so as to form at least one ridge portion 3, a plurality of tube-surrounding portions 5 formed around the heat-transfer tube that extend through each of the fins at a first position and a second position spaced away from each other in a direction of gravitational force, and a plurality of second inclined portions 7 that connect the tube-surrounding portions and the first inclined portions together. Each of the first inclined portions has a groove portion 8 defined in a surface thereof to connect the second inclined portion at the first position to the second inclined portion at the second position. By this configuration, condensed water is smoothly introduced downwardly in the direction of gravitational force along the groove, thereby enhancing the drainage performance.
摘要:
Provided is a heat exchanger whose air pressure loss is small and whose exchanged heat is large. The heat exchanger includes flat tubes, each having therein a plurality of refrigerant circulation holes, and fins fixed to the flat surfaces of the flat tubes, wherein the flat tubes and the fins are alternately stacked to form the heat exchanger. (W - t1 - t2) × Hp × Hf / N is set to 3.95 or greater and 10.0 or less, where de is the equivalent diameter of the plurality of the refrigerant circulation holes, W is the width of each of the flat tubes, t1 is the wall thickness of each of the flat tubes at one end in the widthwise direction corresponding to the distance from the refrigerant circulation hole closest to the one end, t2 is the wall thickness of each of the flat tubes at the other end in the widthwise direction corresponding to the distance from the refrigerant circulation hole closest to the other end, Hp is the height of each of the flat tubes in the stacking direction, Hf is the height of the fins in the stacking direction, and N is the number of the refrigerant circulation holes, and the equivalent diameter de is set to 0.5 or more and 0.8 or less, and the flat tube width W is set to 12 mm or more and 16 mm or less.