Abstract: The present invention relates to a heat exchanger which can suitably regulate the quantity, the feeding position or the feeding order of heat exchange medium fed into tubes to adjust heat exchange performance according to cooling and heating load. The heat exchanger comprises a plurality of tubes placed at least one header, each tube having both ends fixed to the header, medium-distributing means installed at the header for feeding heat exchange medium to the specific tubes, a tank placed over the medium-distributing means, the tank having a medium-inlet pipe, a medium-outlet pipe and distribution passages for feeding heat exchange medium to specific regions of the medium-distributing means, and medium-regulating means installed at the tank and operated in response to a control signal for adjusting the feed of the heat exchange medium.

Abstract: The present invention relates to a variable capacity swash plate type compressor, in which a check valve for circulating refrigerant inside a compressor and preventing a backflow of the refrigerant when an air conditioner is turned off is mounted on a side of a discharge muffler chamber in a cover type so that the discharge muffler chamber is formed by the check valve, thereby reducing the number of components, the number of work processes, and a pulsating pressure (pulsating noise) of discharged refrigerant, allowing that the check valve is mounted at the center of a discharge chamber without any increase in size of the compressor, preventing an overlapping phenomenon of a pulsating pressure waveform of a high-pressure refrigerant at the time of discharge since the check valve is located at the center of the discharge chamber, and preventing a separation of the check valve by fixing the check valve in the discharge chamber via a retainer.

Abstract: The present invention relates to a heat exchanger plate, more particularly, in which a number of beads for imparting turbulence to refrigerant flowing through a channel of a plate are formed streamlined and guide beads arre formed in refrigerant distributing sections in order to reduce the pressure drop of refrigerant while realizing uniform refrigerant distribution. In the heat exchanger plate of a tube including a tank communicating with a channel, a number of first beads so arrayed in the plate that opposed sides are coupled to each other to impart turbulence to refrigerant flowing through the channel and refrigerant distributing sections provided in inlet and outlet sides of the channel and divided by at least one second bead to have a plurality of paths, the first beads are formed streamlined and satisfy an equation of 0.35?W/L?0.75, wherein W is the width and L is the length.

Abstract: A motor driven compressor which can use refrigerant sucked into a swash plate chamber of the compressor to efficiently cool an electric motor, in which a motor unit (10) has an electric motor (13) installed in an inside motor room (12) for rotating a drive shaft (14) and a compressor unit (20, 120) is installed at one side of the motor unit (10).

Abstract: A proximity monitoring system and method for use by scuba divers that includes at least a first transmitting unit worn or otherwise attached to or held by a first scuba diver and a s second monitoring unit worn or otherwise attached to or held by a second scuba diver. The monitoring system and method serve to monitor the proximity of the second scuba diver to the first transmitting unit and provides an alarm that warns the first scuba diver and the second scuba diver that they have moved beyond a preset distance from one another.

Abstract: The present invention relates to a heat exchanger for carbon dioxide, in which a tank having a number of domes is coupled with a header and a connection member having a connection flow channel is interposed between the header and the tank, thereby easily changing a refrigerant flow channel, reducing the volume of a header tank, and improving productivity, pressure resistance and durability.

Abstract: A device and method for monitoring Available Calling Plan Minutes for use by a consumer with a calling plan is disclosed. The device and method include registers at different memory locations for storing data related to a calling plan and to Available Calling Plan Minutes. The device and method also includes a call timer to measure call duration based on call progress as determined by a data access arrangement circuit and a means to determine the call type. Further the device and method includes a means to renew the Available Calling Plan Minutes at the start of a new billing cycle. A display may also be provided to inform the consumer of the Available Calling Plan Minutes and to alert the consumer if the Calling Plan Minutes are exceeded.

Abstract: The present invention relates to a heat exchanger which can suitably regulate the quantity, the feeding position or the feeding order of heat exchange medium fed into tubes to adjust heat exchange performance according to cooling and heating load. The heat exchanger comprises a plurality of tubes placed at least one header, each tube having both ends fixed to the header, medium-distributing means installed at the header for feeding heat exchange medium to the specific tubes, a tank placed over the medium-distributing means, the tank having a medium-inlet pipe, a medium-outlet pipe and distribution passages for feeding heat exchange medium to specific regions of the medium-distributing means, and medium-regulating means installed at the tank and operated in response to a control signal for adjusting the feed of the heat exchange medium.

Abstract: A heat exchanger tube and a heat exchanger that uses the heat exchanger tube. The heat exchanger tube is provided with a generally flat body has a plurality of refrigerant passages that pass through the interior of the flat body in the length direction thereof. The tube includes refrigerant passages which are provided with a plurality of inside passages, each of which has a first curved portion that is made by changing a predetermined curve over at least a time or more to form a curve changing point protruding in the width direction of the body. A second curved portion is formed opposite to the first curved portion and is connected slowly to the first curved portion to thereby form a curve closed face. A pair of outside passages is disposed on the outermost both ends of the plurality of inside passages.

Abstract: The gas-liquid separating condenser of the present invention can enhance the sub-cooling rate in the pre-sub-cooling section as well as in the total sections. Moreover, the present invention can have designs according to calculated conditional expressions of relative dimensional ratios of the sections in condensation of refrigerant to realize the optimum condensing efficiency regardless of the overall size of the gas-liquid separating condenser.

Abstract: The gas-liquid separating condenser of the present invention can enhance the sub-cooling rate in the pre-sub-cooling section as well as in the total sections. Moreover, the present invention can have designs according to calculated conditional expressions of relative dimensional ratios of the sections in condensation of refrigerant to realize the optimum condensing efficiency regardless of the overall size of the gas-liquid separating condenser.

Abstract: Disclosed is a heat exchanger tube and a heat exchanger using the heat exchanger tube. The heat exchanger tube is provided with a generally flat body having predetermined values in length, height and width directions and with a plurality of refrigerant passages that are formed passed through the interior of the flat body in the length direction thereof, the tube including: the refrigerant passages are provided with a plurality of inside passages, each of which has a first curved portion that is made by changing a predetermined curve over at least a time or more to form a curve changing point protruding in the width direction of the body, by which turbulence activating parts are formed, and has a second curved portion that is formed opposite to the first curved portion and is connected slowly to the first curved portion to thereby form a curve closed face, and with a pair of outside passages disposed on the outermost both ends of the plurality of inside passages.

Abstract: Disclosed is a thrust bearing structure for supporting a driving shaft for use in a variable displacement swash plate type compressor. The inventive thrust bearing structure supports a driving shaft of the compressor, and has a specific correlation between the inner and the outer diameters of a stationary race and a driving race, between the races and a cylinder bore and an outer diameter of the driving shaft. That is, a distance between an inner diameter of the stationary race and an outer diameter of the driving shaft is greater than a distance between an outer diameter of the stationary race and a surface of the center bore.

Abstract: Disclosed is a thrust bearing structure for supporting a driving shaft for use in a variable displacement swash plate type compressor. The inventive thrust bearing structure supports a driving shaft of the compressor, and has a specific correlation between the inner and the outer diameters of a stationary race and a driving race, between the races and a cylinder bore and a outer diameter of the driving shaft. That is, a distance (Lr1) between an inner diameter (d3) of the stationary race 82 and an outer diameter (d2) of the driving shaft 20 is greater than a distance (Lr2) between an outer diameter (D3) of the stationary race 82 and a surface 4a of the center bore 4 (Lr1>Lr2).

Abstract: Communication between the various elements of HVAC systems is effected by means of low-cost, low-power, narrow-band AM SAW-stabilized transmitters 21, 27, 39, 86 and receivers 18, 28, 47, 89. A residential embodiment (FIG. 1) transmits temperature information from each room of the house to a master control 24, which is used to control the HVAC demand and to control the damper in the corresponding room. In a first commercial building embodiment (FIGS. 2 and 3), thermostat/transceiver 61-66 assemblies transmit not only demand and control information from the corresponding thermostat 78 (with switches), but relay information transmitted from other thermostat/transceiver assemblies, whereby messages are retransmitted from one floor to the next to overcome the high attenuation of commercial building construction in reaching rooftop HVAC systems 71-76. In a second commercial building embodiment (FIG.