Abstract: An air conditioner including a distributor configured to distribute a fluid to a heat exchanger. The distributor comprises a main pipe; a partition defining a plurality of distribution paths in the main pipe; a first branched pipe inserted into the main pipe as much as first length, linked to a first distribution path of the plurality of distribution paths, connected to a first portion of the heat exchanger; and a second branched pipe inserted into the main pipe as much as second length different from the first length, linked to the first distribution path, connected to a second portion of the heat exchanger. A flow velocity of air exchanging heat at the first portion of the heat exchanger is faster than a flow velocity of air exchanging heat at the second portion of the heat exchanger. The first length is shorter than the second length.

Abstract: The present disclosure relates to a heat pump system comprising an outdoor unit disposed in an outdoor space, a plurality of thermal load units supplied with cool air and hot air, and an intermediate unit disposed between the outdoor unit and the plurality of thermal load units, wherein the intermediate unit is connected to the outdoor unit through refrigerant pipes and connected to the plurality of thermal load units through thermal medium pipes.

Abstract: A technology downsizing a control panel unit is provided. The control panel unit for a machine tool comprises a casing, a duct, and a fan. The casing has an openable door. A control device is arranged in an internal space, which is closed when the door is closed. The duct has a groove and a ventilation opening. The groove is closed at a closed end and open to the internal space at an open end. The ventilation opening connects the groove with the internal space in a position nearer the closed end than the open end. The duct is fixed to an inner wall of the casing in such manner as the groove faces the inner wall. The fan is mounted on the ventilation opening. The air in the internal space is taken into the groove enclosed by the inner wall and the duct by the operation of the fan.

Abstract: A fastening structure includes a fastening member including a bolt and a plurality of fastened members that are fastened and fixed to the fastening member. Further, the bolt contains pure aluminum or an aluminum alloy. At least one fastened member of the plurality of fastened members contains pure aluminum or an aluminum alloy. Pure aluminum or an aluminum alloy of a screw portion of the bolt is brought into direct contact with pure aluminum or an aluminum alloy of at least one fastened member.

Abstract: A heat exchanger includes a main pipe through which refrigerant flows, a plurality of tubes connected to the main pipe to allow refrigerant passing through the plurality of tubes to exchange heat with air, and a refrigerant distributor disposed between the main pipe and the plurality of tubes, to distribute refrigerant passing through the main pipe to the plurality of tubes. The refrigerant distributor includes an upstream structure connected to the main pipe and including a plurality of first distribution flow paths to which the refrigerant passing through the main pipe are distributed, and a downstream structure including a plurality of second distribution flow paths communicating with the plurality of first distribution flow paths, and a plurality of refrigerant outlets communicating with the plurality of second distribution flow paths so as to allow the refrigerant to be discharged to the plurality of tubes.

Abstract: An air conditioner including a distributor capable of adjusting the distribution of fluid flow to branched pipes is provided. The air conditioner includes a distributor configured to distribute a fluid flowing therethrough, and a heat exchanger including refrigerant pipes through which the fluid distributed by the distributor flows, the heat exchanger configured to heat exchange the fluid with air. The distributor includes an outer pipe having a cylindrical shape through which the fluid passes, and branched pipes. Each of the branched pipes includes one end connected to the outer pipe by being inserted into the outer pipe and includes a fluid passing part provided to allow the fluid to flow in or out. At least two branched pipes are configured such that at least one of an insertion length and a diameter of the fluid passing part inserted into the outer pipe are different from each other.

Abstract: An air conditioner including a distributor configured to distribute a fluid to a heat exchanger. The distributor comprises a main pipe; a partition defining a plurality of distribution paths in the main pipe; a first branched pipe inserted into the main pipe as much as first length, linked to a first distribution path of the plurality of distribution paths, connected to a first portion of the heat exchanger; and a second branched pipe inserted into the main pipe as much as second length different from the first length, linked to the first distribution path, connected to a second portion of the heat exchanger. A flow velocity of air exchanging heat at the first portion of the heat exchanger is faster than a flow velocity of air exchanging heat at the second portion of the heat exchanger. The first length is shorter than the second length.

Abstract: A technology downsizing a control panel unit is provided. The control panel unit for a machine tool comprises a casing, a duct, and a fan. The casing has an openable door. A control device is arranged in an internal space, which is closed when the door is closed. The duct has a groove and a ventilation opening. The groove is closed at a closed end and open to the internal space at an open end. The ventilation opening connects the groove with the internal space in a position nearer the closed end than the open end. The duct is fixed to an inner wall of the casing in such manner as the groove faces the inner wall. The fan is mounted on the ventilation opening. The air in the internal space is taken into the groove enclosed by the inner wall and the duct by the operation of the fan.

Abstract: A heat exchange apparatus includes a first heat exchanger configured to transfer heat between a refrigerant and another medium, a plurality of second heat exchangers configured to transfer heat between the refrigerant and the liquid, a compressor configured to pressurize the refrigerant and a plurality of expansion devices for each of the plurality of second heat exchangers and configured to expand the refrigerant pressurized by the compressor, wherein the refrigerant flows through the plurality of second heat exchangers in parallel, and the liquid flows through the plurality of second heat exchangers in series.

Abstract: The present disclosure relates to a heat pump system comprising an outdoor unit disposed in an outdoor space, a plurality of thermal load units supplied with cool air and hot air, and an intermediate unit disposed between the outdoor unit and the plurality of thermal load units, wherein the intermediate unit is connected to the outdoor unit through refrigerant pipes and connected to the plurality of thermal load units through thermal medium pipes.

Abstract: A heat exchange apparatus includes a first heat exchanger configured to transfer heat between a refrigerant and another medium, a plurality of second heat exchangers configured to transfer heat between the refrigerant and the liquid, a compressor configured to pressurize the refrigerant and a plurality of expansion devices for each of the plurality of second heat exchangers and configured to expand the refrigerant pressurized by the compressor, wherein the refrigerant flows through the plurality of second heat exchangers in parallel, and the liquid flows through the plurality of second heat exchangers in series.

Abstract: A check valve includes: a base member provided with an inlet channel along which fluid flows in one direction; a valve unit disposed on a valve mounting surface and including a film valve body and a frame body; and a valve seating surface defined on the valve mounting surface at the periphery of the opening of the inlet channel, wherein one or more communicating grooves are formed on the valve mounting surface across the frame body so as to extend from the valve seating surface to the outside of the frame body, wherein the inlet channel is blocked by the film valve body when the film valve body is in contact with the valve seating surface, and wherein the inlet channel and the outside of the frame body are communicated via the communicating grooves when the film valve body is separated from the valve seating surface.

Abstract: A dynamic electroacoustic transducer adapted to be surface-mounted on a printed circuit board comprises a diaphragm, a synthetic resin frame for supporting the diaphragm at the periphery thereof, a surface-mounting terminal member mounted on the frame, and a synthetic resin cover with a sound emitting hole fixed to the frame so as to cover the diaphragm. Since the frame and the cover are made of synthetic resin of lower heat conductivity, the electroacoustic transducer is allowed to be subject to reflow soldering when it is surface-mounted on a printed circuit board without a damage to the diaphragm and the magnet.

Abstract: An electroacoustic transducer 1 is constituted by a base 24 formed of magnetic material; a magnetic core 22 formed of magnetic material and provided erectly on the base 24; a diaphragm 20 formed of magnetic material and supported with an air gap between the diaphragm and a forward end of the magnetic core; a magnet 25 constituting a magnetic circuit together with the base 24, the magnetic core 22 and the diaphragm 20 so as to provide a magnetostatic field; a coil 23 disposed around the magnetic core 22 for applying an oscillating magnetic field to the magnetic circuit; a housing 30 molded integrally with the base 24 and the magnet 25, and so on. The housing 30 has notch holes 38 extending from a bottom surface thereof to the magnet 25.

Abstract: An electroacoustic transducer 1 is configured by: a base 24 made of a magnetic material; a magnetic core 22 made of a magnetic material, and upstanding on the base 24; a diaphragm 20 made of a magnetic material and supported with being separated from the tip end of the magnetic core by a gap; a magnet 25 which cooperates with the base 24, the magnetic core 22 and the diaphragm 20 to constitute a magnetic circuit, and which supplies a static magnetic field; a coil 23 wound around the magnetic core 22, and supplying an oscillating magnetic field to the magnetic circuit; and a housing 30 formed integrally with the base 24 and the magnet 25. A communication path 50 through which the back space of the diaphragm 20 communicates with the outside is formed in a side wall of the housing 30.

Abstract: An electroacoustic transducer 1 is configured by: a base 24 made of a magnetic material; a magnetic core 22 made of a magnetic material and upstanding from the base 24; a diaphragm 20 made of a magnetic material and spaced from the tip end of the magnetic core by a gap; a magnet 25 which cooperates with the base 24, the magnetic core 22 and the diaphragm 20 to constitute a magnetic circuit, and which supplies a static magnetic field; a coil 23 wound around the magnetic core 22, and supplying an oscillating magnetic field to the magnetic circuit; and a housing 30 formed integrally with the base 24 and the magnet 25. The housing 30 is interposed between the base 24 and the magnet 25, and the plan-view shape of the base 24 has a portion which elongates more outwardly than the width center of the magnet 25.

Abstract: An electroacoustic transducer 1 is constituted by a base 24 formed of magnetic material; a magnetic core 22 formed of magnetic material and provided erectly on the base 24; a diaphragm 20 formed of magnetic material and supported with an air gap between the diaphragm and a forward end of the magnetic core; a magnet 25 constituting a magnetic circuit together with the base 24, the magnetic core 22 and the diaphragm 20 so as to provide a magnetostatic field; a coil 23 disposed around the magnetic core 22 for applying an oscillating magnetic field to the magnetic circuit; a housing 30 molded integrally with the base 24 and the magnet 25, and so on. The housing 30 has notch holes 38 extending from a bottom surface thereof to the magnet 25.

Abstract: In an electroacoustic transducer having an outer case integral with lead terminals and a drive section including a coil disposed in the outer case with both coil terminals of the coil being led out on and connected to lands of the lead terminals, the lands are formed in approximately circular shapes.

Abstract: The invention provides an electroacoustic transducer capable of preventing degradation in its acoustic performance as a result of the reflow soldering process applied. With the electroacoustic transducer, variation in the minimum resonance frequency Fo of a diaphragm is restrained, stabilizing the acoustic performance by causing a decrease in the minimum resonance frequency Fo of the diaphragm due to irreversible demagnetization of the magnet caused by the reflow soldering temperatures to cancel out an increase in the minimum resonance frequency Fo of the diaphragm due to thermal contraction of a holder member caused by the reflow soldering temperatures.

Abstract: An electroacoustic transducer, which has a lead frame previously formed into a predetermined shape, an outer case formed integrally with the lead frame and a drive section including a coil arranged inside the outer case, comprises an opening formed in the outer case; lands formed by exposing a part of the lead frame through an outer surface of the outer case; and the coil having coil terminals led out of the outer case through the opening and connected to the lands.