Abstract:
PROBLEM TO BE SOLVED: To provide a heat exchanger that does not retain heat on the surface of a fin provided in a shell, even when fluid is made to flow inside the shell.SOLUTION: In the heat exchanger 1 of a shell-and-tube system which has a plurality of heat transfer pipes 4 for passing first fluids 6 to be objects of heat exchange, a plurality of fins 5 attached to outer peripheries of the heat transfer pipes 4, and a cylindrical shell 2 for housing the plurality of heat transfer pipes 4 and the fins 5, and performs heat exchange of the first fluids 6 in the heat transfer pipes 4 by passing second fluid 7 in a trunk space S surrounded by the shell 2, the fins 5 are divided radially around the central axis CL of the shell 2, and fins 5 in a fan shape are arranged in a spiral staircase shape along the central axis CL of the shell 2. Thus, a flow component in a rotation direction is formed to remove heat at a boundary part between the shell 2 and the fins 5.
Abstract:
PROBLEM TO BE SOLVED: To provide a method of manufacturing a heat transfer tube in which a spring is surely closely kept into contact with an inner face of the heat transfer tube, and a fluid flowing along the axial direction is prevented from being accumulated in a clearance gap between the spring and the inner face of the heat transfer tube.SOLUTION: In manufacturing the heat transfer tube 3, the spiral spring 4 is inserted into the heat transfer tube 3. In inserting the spring 4 into the heat transfer tube 3, the spring 4 is locked on locking sections 61 disposed on both ends of a rod member 6, and extended to reduce its outer diameter. The spring 4 in a state of being reduced in its outer diameter, is inserted into the heat transfer tube 3, and then the locking state is released to recover an original state, so that the spring is pressed to the inner face 31 of the heat transfer tube 3. A metal rod 5 as a brazing filler metal 51 is placed to be melted in a furnace, and spread over the whole face by capillary action. The metal rod 5 having a quantity to form curved boundary sections in the same direction between the spring 4 and the inner face 31 of the heat transfer tube 3, is used.
Abstract:
PROBLEM TO BE SOLVED: To provide as many as possible heat transfer pipes by devising partition plates of a multitubular heat exchanger, and to make gaps between the heat transfer pipes constant.SOLUTION: The multitubular heat exchanger 1 includes: the plurality of heat transfer pipes 2 for making a first fluid flow; the partition plates 3 provided on both end sides of the heat transfer pipes 2; an exchanger chamber 40 surrounded between the right and left partition plates 3; and headers 50 provided on end part sides of the heat transfer pipes 2 from the right and left partition plates 3. When producing the multitubular heat exchanger 1, pipes 31 through which the heat transfer pipes 2 can be inserted are bundled and cut, and a plurality of ring members 31a are provided. a brazing material 32 is injected into gaps of the ring members 31a, and is brazed, thereafter the heat transfer pipes 2 are inserted into the ring members 31a, and the gaps are filled to form the partition plates 3.
Abstract:
PROBLEM TO BE SOLVED: To improve efficiency in heat exchange inside a tank in a hot-water storage type water heater which stores a heat exchanger in the tank.SOLUTION: The hot-water storage type water heater 1 includes a heat exchanger 21 for air, a compressor 22 for compressing a cooling medium which is heated by using the heat exchanger 21 for air, a heat exchanger for water 23 for performing heat exchange between the compressed and heated cooling medium by the compressor 22 and water, and a tank 3 for reserving the water heated by the heat exchanger 23 for water. The hot-water storage type water heater stores the heat exchanger 23 for water in the tank 3 to heat the water in the tank 3 by making the heat exchanger 23 for water directly contact with the water in the tank 3, rotates a stirring member 41 by a stirring means 4 using a magnetic property when the water in the tank 3 is heated, and stirs the water in the tank 3.
Abstract:
PROBLEM TO BE SOLVED: To provide a heat exchanger having a small footprint.SOLUTION: A heat transfer tube row unit 53 is formed of: two inner tubes 23 which are inserted into each of a plurality of parallel outer tubes 13 and have lead out both ends; primary branch tubes 27 which are connected to the inlet ends of the inner tubes 23 and each of which has one closed end; secondary branch tubes 33 which are connected to the inlet ends of the outer tubes 13 and each of which has one closed end and into which the inner tubes 23 are penetrated; primary collecting tubes 39 which are connected to the outlet ends of the inner tubes and each of which has closed other ends 23; and secondary collecting tubes 41 which are connected to the outlet ends of the outer tubes and each of which has closed the other ends 13 and into which the inner tubes 23 are penetrated. At the diagonal positions of a square, a primary inlet header 15 and a primary outlet header 17, and a secondary inlet header 19 and a secondary outlet header 21 are erected. In the plurality of heat transfer tube row units 53 arranged in a stacked manner, the other ends of the primary branch tubes 27 are connected to the primary inlet header 15, the other ends of the secondary branch tubes 33 are connected to the secondary inlet header 19, one-side ends of the primary collecting tubes 39 are connected to the primary outlet header 17, and one-side ends of the secondary set tubes 41 are connected to the secondary outlet header 21.
Abstract:
PROBLEM TO BE SOLVED: To fully perform dehumidification of air and drying of a dehumidification agent.SOLUTION: A first corrugated plate 6 which is held between upper and lower flat plates 5 onto which a dehumidification agent 4 is applied and a second corrugated plate 7 which is provided in a direction orthogonal to the first corrugated plate 6 are each laminated. When air 8 which is to be dehumidified is passed through the first corrugated plate 6, cool fluid is made to pass at one surface side of the second corrugated plate 7 to cool the dehumidification agent 4 and the air 8. Whereas, when the dehumidification agent 4 is dried, hot fluid is made to pass at the other surface side of the second corrugated plate 7 to dry the dehumidification agent 4 in an air flow route 11. After definite time, desiccant unit 2a, 2b thus composed are switched by using switching valves 9a, 9b to perform dehumidification of the air 8 and drying of the dehumidification agent 4.
Abstract:
PROBLEM TO BE SOLVED: To provide an LED lighting device which can dissipate heat in the vicinity of a base and is independent of the size of a partial fixture. SOLUTION: An LED lighting device 1 which can be an alternative for a dichroic halogen lamp includes a base 5 attached to a lighting appliance, an insulation portion 4 incorporating a power supply portion 3 which converts AC power supply to DC power supply, an LED module 24 which emits light by electric power converted through the power supply portion 3, and a mirror 21 which is opened in a tapered shape at the outer peripheral part of the LED module 24. The insulation portion 4 provided at the outer periphery of the power supply portion 3 is constituted of a metal member, and an insulation film such as a fluororesin film is formed at the metal member on the side of the power supply portion 3, and a radial fin 43f is provided at the outer peripheral part of the metal member. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a heat exchanger efficiently exchange heat between heat exchange units when heat exchange is performed by using a centrifugal fan such as a turbo fan and a sirocco fan. SOLUTION: This heat exchanger 3 mounted on an outer peripheral part of the centrifugal fan 1 for exchanging heat by a gas by the centrifugal fan 1, is provided with: a bent tube 5 spirally wound on an outer part of the centrifugal fan 1; and a fin 6 disposed while being kept into contact with an outer peripheral section of the bent tube 5. The fin 6 is radially disposed with respect to the center of the centrifugal fan 1 to allow a gas flowing into the centrifugal fan 1 or a gas discharged from the centrifugal fan 1 to efficiently pass along the fin 6. COPYRIGHT: (C)2011,JPO&INPIT