Abstract:
A heat exchanger uses a refrigerant acting under a high pressure, such as carbon dioxide, as a refrigerant. The heat exchanger includes first and second header pipes arranged a predetermined distance from each other and parallel to each other, each having at least two chambers independently sectioned by a partition wall, a plurality of tubes for separately connecting the chambers of the first and second header pipes, facing each other, wherein the tubes are divided into at least two tube groups, each having a single refrigerant path, a refrigerant inlet pipe formed at the chamber disposed at one end portion of the first header pipe, through which the refrigerant is supplied, a plurality of return holes formed in the partition wall to connect two chambers adjacent to each other, through which the refrigerant sequentially flows the tube groups, and a refrigerant outlet pipe formed at the chamber of one of the first and second header pipes connected to a final tube group of the tube groups along the-flow of the refrigerant, through which the refrigerant is exhausted.
Abstract:
A swash plate type compressor having variable capacity includes a housing unit having a cylinder block where a plurality of bores are formed and forming a crank chamber, a suction chamber, and a discharge chamber, a drive shaft rotatably installed by the housing unit, a piston installed at each of the bores of the cylinder to be capable of sliding, a rotor disposed at the crank chamber and installed at the drive shaft, and rotating together with the drive shaft, a swash plate coupled to the rotor by a hinge unit for reciprocating the piston and having a hub coupled to the drive shaft, and a pivot unit for limiting pivot of the swash plate as a slot formed in the drive shaft in the axial direction and the hub of the swash plate are directly pin-coupled. In the compressor, first and second flat portions are formed at both sides of the drive shaft in a direction perpendicular to the slot of the drive shaft, and third and fourth flat portions are formed at an inner surface of the hub corresponding to the first and second flat portions.
Abstract:
The present invention relates to a disc and hub assembly for an electromagnetic clutch of a compressor. The assembly comprises: a disc (120) adapted to be attracted to or separated from a friction surface of a pulley under the action of an electromagnetic coil; a hub (110) coupled to a driving shaft of the compressor, the hub penetrating the disc (120) and having a flange (112) formed on its outer peripheral surface; a plate spring (130) which includes a plate portion (131) coupled to the top surface of the disc (120), a number of leaf spring portions (135) obliquely extending inwardly from the plate portion (131) to be coupled to the flange (112) of the hub (110) and having ends (137) which are bent toward the disc (120), and dampers (160) coupled to the ends of the leaf spring portions (135); and shock-absorbing means (140) interposed between the disc (120) and the plate portion (131) to reduce noise and impact during on/off of the clutch.
Abstract:
This present invention relates to an axial-flow fan including a central hub connected with a driving shaft of a motor, and a plurality of blades extending radially along the circumference of the hub for blowing air toward an axial direction, the plurality of blades integrated with the hub into a single body, wherein assuming that a camber ratio at a blade root(cr1) of each blade is the value obtained by dividing a maximum camber value at the blade root into a chord length, a camber ratio at a blade tip(cr2) of each blade is the value obtained by dividing a maximum camber value at the blade tip into the chord length, and a percentage of decrease of the camber ratio is the value obtained by dividing a difference value between the camber ratio at the blade root(cr1) and the camber ratio at the blade tip(cr2) into the camber ratio at the blade root(cr1), the percentage of decrease of the camber ratio is in a range between 33% and 85%.
Abstract:
The present invention relates to a hood latch assembling device for assembling a hood latch to a position of a carrier which is the same as a hood latch part of the vehicle. The hood latch assembling device includes: a carrier assembling stand for fixing the carrier; and a hood latch guide jig for exactly positioning the hood latch assembly at a predetermined position of the carrier. The hood latch assembling device can reduce a time period required for an assembling process of the vehicle and lower an defective proportion as a position error rate of the hood latch is reduced by assembling the hood latch to an exact position of a carrier when a front end module is constructed.
Abstract:
Method and device for forming a pulley are disclosed. The method of the present invention includes the first step to fix the plate working piece formed with the hole in the intermediate thereof to the first forming device; the second step to form the inner hub by rotating the plate working piece and pressing the upper surface of the plate works in drawing process; the third step to obtain the first semi-manufactured pulley by pressing the upper surface of the plate working piece and by forming the outer hub in drawing process. Further, the method can include the fourth step to fix the first semi-manufactured pulley to the second forming device; the fifth step to gather the first convex bead portion by pressing the edge of the first semi-manufactured pulley; the sixth step to form the second convex bead portion by pressing the first convex bead portion; the seventh step to fix the first semi-manufactured pulley to the third forming device; the eighth step to form the flat bead portion by pressing the convex bead portion, and the ninth, step to obtain the second semi-manufactured pulley having the V-profile forming portion 70 formed with the recess 80 on the outer periphery surface by pressing the flat bead portion.
Abstract:
An air conditioner for a vehicle includes a case having a plurality of air paths separated by a separation wall. A defrost opening, a vent opening, and a floor opening selectively open or closed by doors according to a mode are formed to supply the air input through the air paths to areas of the inside of the vehicle. An evaporator is installed at an entrance of the air paths to perform heat exchange to make the air passing through the evaporator in a low temperature state so as to cool the inside of the vehicle. A heater core is installed at the rear side of the evaporator to perform heat exchange to make the air passing through the heater core in a hot temperature state so as to heat the inside of the vehicle. A first variable wall is installed between the evaporator and the heater core to separate the air paths into upper and lower portions, or connect the separated air paths, and open or close a heated air path of the heater core. A temp door is installed at the upper portion of the first variable wall between the evaporator and the heater core to adjust a degree of opening or closing of a cooled air path bypassing the heater core. A second variable wall is installed at the rear side of the heater core to separate the air passing through the heater core into upper and lower portions or connect the separated air paths. The first variable wall and the temp door are independently controlled so that a path of the air passing through the evaporator can be varied.
Abstract:
A hood latch assembly for a front end module of a vehicle includes a hood latch, which locks a striker of a hood, installed at an upper horizontal portion of a front panel of the front end module formed of upper and lower horizontal portions and a vertical portion connecting the left and right sides of the upper and lower horizontal portions. The first release cable has one end connected to a release lever disposed at a driver's seat. The first release cable is installed at the upper horizontal portion of the front panel to be capable of sliding. A second release cable has one end connected to the hood latch. A connection unit is installed at the other end portions of the first and second release cables, which connects or separates the first and second release cables.
Abstract:
A swash plate type compressor includes a front head portion having a suction chamber and a discharge chamber sectioned by a partition wall formed on an inner surface of the front head portion, and having at least one upper discharge guide groove and at least one lower discharge guide groove formed in an upper portion and a lower portion of the discharge chamber, respectively, a rear head portion having a suction chamber and a discharge chamber sectioned by a partition wall formed on an inner surface of the rear head portion, and having at least one upper discharge guide groove and at least one lower discharge guide groove formed in an upper portion and a lower portion of the discharge chamber, respectively, to correspond to the upper and lower discharge guide groove of the front head portion, a cylinder installed between the front and rear head portions or inside the front and rear head portions and having a plurality of bores installed such that pistons are capable of sliding and at least one upper discharge passageway and at least one lower discharge passageway for connecting the upper and lower discharge guide grooves of the front and rear head portions, respectively, a drive shaft installed to penetrate the cylinder and rotated by a driving source, and a swash plate installed at the driving shaft to be inclined and having the pistons installed at an end portion of the swash plate. Thus, in the swash plate type compressor, the compressed refrigerant can be quickly discharged with less resistance so that, when the liquid refrigerant is sucked, compression noise can be reduced.
Abstract:
A method for forming a solid film lubricant on the surface of a part having an arbitrary shape is provided. The method for forming a solid film lubricant includes: preparing a carrier having a predetermined shape and size; coating lubricant powder on the carrier; and coating the lubricant powder over the surface of the part by physical contact between the carrier coated with the lubricant powder and the part. The solid film lubricant has uniform thickness and excellent adhesion regardless of the shape of a target part. Lubrication of the solid film lubricant lasts for a longer period of time without supply of lubricant oil, and under high-load and high-speed operating conditions. Therefore, the solid film lubricant is applicable to a variety of parts widely used in aerospace, defense, and high-precision industries.