摘要:
An inverter for converting DC power to AC power, an oscillation control circuit for stepwise generating a command value concerning the conversion condition of the inverter, and an operation controller which, when the command value from the oscillation control circuit changes, controls the oscillation control circuit to repetitively generate alternate new and old or present command values before and after change of the command value. Particularly, this invention provides an inverter capable of continuing smooth operation even when the control system has a limited resolution.
摘要:
Provided are a system of highly clean rooms capable of continuously maintaining high cleanliness of air of class 1 or above and supplying enough oxygen inside the room for several persons to live in and a wall adapted to the structure of such a system.The system of highly clean rooms 10 is provided with a living space 6 and a space 5 between the roof and the ceiling as subspaces of an enclosed space formed by a room 1a. One of the lateral walls of the room 1a is constituted of a wall 9 with an internal space 7, which is a hollow wall. The internal space 7 and the living space 6 are in contact via an inner wall 9a of the wall 9, and a gas exchange membrane 26 is stretched in the inner wall 9a. Furthermore, a gas flow path 24 is provided inside the inner space 7 and the gas flow path 24 allows airtight communication between an opening 23 provided on the lowest part of the internal wall 9a and a gas entry opening of a fan filter unit 21 provided on a ceiling wall 2a inside the space 5 between the roof and the ceiling.
摘要:
An air-conditioning apparatus includes an outdoor unit equipped with an outdoor-side heat exchanger formed by inserting a plurality of heat transfer pipes made of a metal material, such as aluminum or an aluminum alloy, into a plurality of fins, and an indoor unit equipped with an indoor-side heat exchanger formed by inserting a plurality of heat transfer pipes made of a metal material, such as aluminum or an aluminum alloy, into a plurality of fins. The heat transfer pipes in the outdoor-side heat exchanger are each internally provided with a plurality of straight grooves substantially parallel to the pipe axial direction. The heat transfer pipes in the indoor-side heat exchanger are each internally provided with a plurality of spiral grooves having a predetermined lead angle.
摘要:
A heat exchanger has a plurality of heat exchange function surface units, capable of suppressing an influence of the gravity exerted on refrigerant and suppressing reduction of heat exchange performance in each of the surfaces. The heat exchanger has the plurality of heat exchange function surface units, and includes an upper header pipe, a lower header pipe, and a plurality of heat exchange pipes provided between the pair of upper and lower header pipes in each of the heat exchange function surface units. The plurality of heat exchange function surface units have a parallel connection relationship, and a plurality of the lower header pipes are connected to a lower collection pipe through a branch current adjusting section.
摘要:
A device manufacturing method and a device manufacturing apparatus in a single wafer processing system with wafers in 0.5 inch size. A large number of sealed-type unit process apparatuses are arranged to form a manufacturing line. The unit process apparatus is portable and processes a single process in the manufacturing process. When the number of a unit of manufacturing is more than the number of the unit process apparatuses, the unit process apparatuses are arranged as a flow shop system, corresponding to the order of processes for the device. When the number of the units is nearly equal to the number of processes, the apparatuses are arranged as a class shop system for classified arrangement at every major division of orders of processes. When the number of the units is far less than the number of processes, the apparatuses are arranged as a multicell shop system.
摘要:
A functional device and functional system are provided. A functional device is formed by coupling a first structure formed by local interaction and a second structure formed according to a predetermined global rule via a third structure having an anisotropic configuration.
摘要:
An electrode mounting structure of a surface treatment apparatus in which a metal electrode is disposed so as to oppose to an inner-peripheral surface of a cylinder, the electrode and the cylinder are energized in a state where treatment liquid is interposed between the electrode and the cylinder inner-peripheral surface so as to perform pre-plating or plating to the cylinder inner-peripheral surface, and the metal electrode is detachably attached to a metal electrode holder member. The structure includes a resin coupler having a threaded portion engaged with a threaded portion formed on the electrode holder member.
摘要:
When forming fins and heat transfer tubes by aluminum material, a pressure loss in the tube does not increase and a heat exchanger can be provided having heat transfer performance equal to or higher than a copper tube. The heat exchanger includes fins made of an aluminum material having a low deformation resistance and heat transfer tubes made of an aluminum material having a higher deformation resistance than the aluminum material forming the fins, and on whose internal surface the groove is provided to penetrate the fin to be fixed. It is also arranged that the tube axial direction (a) of the inner surface of the heat transfer tube and the direction (b) of the groove provided on the internal surface of the heat transfer tube are substantially parallel. In this case, the groove direction (b) forms an angle of 0 degrees to 2 degrees with respect to the tube axial direction (a) of the inner surface of the heat transfer tube. The depth of the groove of the heat transfer tube after tube expansion is 0.2 mm to 0.3 mm, and the top width of the ridge top portion is 0.08 mm to 0.18 mm. Further, the number of grooves of the heat transfer tube 20 is 40 to 60, and an apex angle a is 5 degrees to 20 degrees.
摘要:
A heat exchanger 100 has plate fins 1 laminated at an interval and a heat transfer pipe 2 inserted perpendicularly to the fins formed by a plurality of straight pipe portions 2s and a curved pipe portion 2r communicating end portions thereof with each other. In the plate fin 1, a first slit fin 3a protruding to the side of one face or the like and a second slit fin 3b protruding to the side of the other face or the like are formed by cutting and raising. A straight pipe portion 21a and the like are arranged in a zigzag state in parallel with each other, and a “step pitch Dp”, which is an interval between axial cores thereof in a step direction, and a “row pitch Lp”, which is an interval in a row direction, form relationships of “4 mm≦D≦6 mm, 14 mm≦Dp≦17 mm, 7 mm≦Lp≦10 mm” to an outer diameter D of the heat transfer pipe 2.
摘要:
A heat exchanger including plate fins stacked at respective intervals relative to one another, and heat exchanger tubes penetrating the fins in. The heat exchanger exchanges heat between first and second fluids flowing, respectively, inside and outside the heat exchanger tubes. Each of the fins includes a substantially planar main body and cut-raised portions extending from the main body and disposed at an upstream side of flow of the second fluid. Each of the cut-raised portions corresponds to a respective heat exchanger tube and includes first and second opposed side ends connected to the main body of the fin. The first side end is nearer to the corresponding heat exchanger tube than is the second side end, the first side end is longer than the second side end, and the first side end is disposed at a downstream side of the flow of the second fluid, facing the corresponding heat exchanger tube.