Abstract: A battery pack having a first cell unit and a second cell unit in which multiple battery cells are connected in series is provided. When the battery pack is not connected to an electric apparatus main body, the first cell unit and the second cell unit are in a non-connection state in which the first cell unit and the second cell unit are not electrically connected to each other. The battery pack includes: a microcomputer, connected to one of the first cell unit and the second cell unit; a residual quantity display portion, connected to the microcomputer and displaying a battery residual quantity of the battery pack; and a switch, being operated by a worker. When the switch is operated while in the non-connection state, the microcomputer is configured to perform a light-on control to display the battery residual quantity by the residual quantity display portion.

Abstract: The present invention groupcasts a groupcast frame in a short period of time by using millimeter wave communication. A communication device equipped with a MAC control circuit for controlling a procedure for discovering a communication partner device and a procedure for determining the best transmission sector, and also equipped with a wireless circuit for transmitting a unicast frame to the communication partner device by using the best transmission sector, wherein the MAC control circuit controls the wireless circuit so as to start a timer for each discovered communication partner device after the procedure for discovering communication partner devices is completed, and transmit a groupcast frame to communication partner devices for which the timer has not finished by using the best transmission sector upon receiving a groupcast frame transmission request from a higher layer before all timers have finished.

Abstract: An air conditioner 1 is disclosed as an air conditioner configured to condition air by connecting an indoor unit 2 including a first heat exchanger 11 in which a refrigerant exchanging heat with room air flows to an outdoor unit 3 including a second heat exchanger 24 in which a refrigerant exchanging heat with outdoor air flows. The first heat exchanger 11 includes a first heat transfer tube 11a1 made of aluminum or aluminum alloy, and the second heat exchanger 24 includes a second heat transfer tube 24a made of aluminum or aluminum alloy. A first sacrificial layer 45a is formed on an outer circumferential surface of the first heat transfer tube 11a1, and a second sacrificial layer 35 is formed on an outer circumferential surface of the second heat transfer tube 24a. The maximum thickness to of the second sacrificial layer 35 is larger than the sacrificial layer ti1 of the first sacrificial layer 45a. This suppresses corrosion of the heat transfer tube of the outdoor unit.

Abstract: A heat transfer tube as a first refrigerant pipe has a first portion, a first expansion portion, a second portion, a second expansion portion, and a third portion arranged in order. A connecting tube as a second refrigerant pipe has a fourth portion facing the second portion and a fifth portion facing the third portion. The connecting tube is inserted into the heat transfer tube. The inner diameter of the second portion is larger than the inner diameter of the first portion, and the inner diameter of the third portion is larger than the inner diameter of the second portion. The outer diameter of the fifth portion is larger than the outer diameter of the fourth portion. The fifth portion and the third portion are brazed.

Abstract: A receiver including a plurality of wave receivers that receive signals arriving from a predetermined direction, a plurality of detection units that is connected to at least some of the plurality of wave receivers and detect arrival times of signals received by a connected wave receivers, and a plurality of adjustment units that adjust a deviation between arrival times of the plurality of wave receivers based on arrival times or arrival directions of the plurality of detected signals.

Abstract: According to an aspect of the present invention, there is provided a communication apparatus including: a synchronizer configured to perform synchronization processing according to a Doppler shift on a reception signal; and an equalizer configured to perform equalization processing on a reception signal on which the synchronization processing has been performed, in which the synchronizer includes a correlator configured to output a correlation between a reception signal and a known preamble sequence and a correlation between the reception signal and a known postamble sequence, a slide correlator configured to output a sliding correlation based on an output of the correlator, and a Doppler estimator configured to estimate a Doppler shift based on the sliding correlation of the slide correlator

Abstract: A battery pack and an electric apparatus are provided. The battery pack is configured to be connectable to an electric apparatus main body of the electric apparatus. The battery pack includes: a first cell unit, including a first plurality of battery cells connected to each other, a first positive terminal, and a first negative terminal; a second cell unit, including a second plurality of battery cells connected to each other, a second positive terminal, and a second negative terminal; a microcomputer; and a casing, accommodating the first cell unit, the second cell unit, and the microcomputer. The first cell unit and the second cell unit are configured to be switched a connection state each other. The microcomputer is configured to be electrically connected to a positive terminal and a negative terminal of one of the first cell unit and the second cell unit and to be provided a power from the one of the first cell unit and the second cell unit.

Abstract: An indoor heat exchanger includes a heat exchanger body and a connection pipe connected to the heat exchanger body through a connection portion. The connection pipe includes a first curved portion having an elongation greater than or equal to 30%.

Abstract: An indoor unit includes a casing, a heat exchanger accommodated in the casing, and connection pipe, connected to the heat exchanger, through which a refrigerant flows. The connection pipe includes a first refrigerant pipe made of a first metal and a second refrigerant pipe made of a second metal higher in potential than the first metal. One end of the first refrigerant pipe is connected to the heat exchanger, and the other end of the first refrigerant pipe is connected to one end of the second refrigerant pipe in the casing.

Abstract: A heat exchanger includes: a fin group including plate-shaped fins; heat transfer tubes penetrating the plate-shaped fins; and a support plate at an end of the fin group. The heat transfer tubes penetrate the support plate. The heat exchanger is configured to cause a heat medium flowing through the heat transfer tubes to exchange heat with air. End portions of the heat transfer tubes form protrusions protruding from the support plate. The protrusions include: a first protrusion connected to one of the protrusions adjacent to the first protrusion; and a second protrusion connected to a flow path pipe different from one of the protrusions adjacent to the second protrusion. A distance from a tip end of the second protrusion to the support plate is shorter than a distance from a tip end of the first protrusion to the support plate.

Abstract: A connection pipe of a heat exchange unit includes a second refrigerant pipe made of a second metal higher in potential than a first metal of a first refrigerant pipe. The second refrigerant pipe includes a first section that is bent to protrude upward. The first section includes a first curved section disposed on a first refrigerant pipe side relative to an apex of the first section and a second curved section disposed on a side opposite to the first refrigerant pipe side relative to the apex of the first section. A covering member or a coating film is provided in intimate contact with the second refrigerant pipe to cover a first refrigerant pipe side edge of the second refrigerant pipe and the first curved section.

Abstract: An indoor unit includes a heat exchanger and a connection pipe, connected to the heat exchanger, through which a refrigerant flows. The connection pipe includes a first refrigerant pipe made of a first metal and a second refrigerant pipe made of a second metal higher in potential than the first metal. One end of the first refrigerant pipe is connected to the heat exchanger, and the other end of the first refrigerant pipe is connected to one end of the second refrigerant pipe. The first refrigerant pipe includes a vertical straight section, a bent section that is continuous with to a one end of the vertical straight section, and a horizontal straight section that is continuous with one end of the bent section. A covering member adheres to and covers the first refrigerant pipe from one end of the horizontal straight section to the bent section.

Abstract: An indoor unit of an air conditioner includes a heat transfer tube and a connection pipe. The connection pipe includes a first connection pipe a liquid pipe and a second connection pipe as a gas pipe. The first connection pipe and the second connection pipe each have a first section and a second section. A contact prevention member is provided in an area where the second section of the first connection pipe and the first section of the second connection pipe approach each other, or in an area where the first section of the first connection pipe and the second section of the second connection pipe approach each other.

Abstract: A vehicle exterior part includes a decorative body, a heater sheet, a connector pin. The decorative body includes a base material, and a transparent resin layer. The heater sheet includes a heat generating body, and an extending portion. A part of the heater wire in the extending portion is joined to the connector pin inside an outer periphery of the base material by a joining portion made of a conductive material. The outer periphery is formed with a window configured to join the heater wire to the connector pin by the joining portion in a state where a joining position is exposed to an outside of the outer periphery. The window is provided with a waterstop portion configured to restrict water from entering the joining position. The waterstop portion is formed by filling the window with a potting material.

Abstract: A heat transfer tube as a first refrigerant pipe has a first portion, a first expansion portion, a second portion, a second expansion portion, and a third portion arranged in order. A connecting tube as a second refrigerant pipe has a fourth portion facing the second portion and a fifth portion facing the third portion. The connecting tube is inserted into the heat transfer tube. The inner diameter of the second portion is larger than the inner diameter of the first portion, and the inner diameter of the third portion is larger than the inner diameter of the second portion. The outer diameter of the fifth portion is larger than the outer diameter of the fourth portion. The fifth portion and the third portion are brazed.

Abstract: A heat exchanger includes a heat transfer unit (HTU) including a heat transfer channel portion (HTCP) and auxiliary heat transfer portions (AHTPs). The HTCP and the AHTPs extend in a direction and are disposed in another direction being perpendicular to the direction. One of the AHTPs is an AHTP adjacent to the HTCP in another direction. When viewed from the direction, the AHTP is at an end of the HTU in another direction. A distance from the AHTP to the HTCP in another direction is defined as a length, in a case where the HTU further includes a plurality of HTCPs, the length is larger than a distance between adjacent ones of the HTCPs in another direction, and in a caser where the heat exchanger further includes a plurality of HTUs, the length is larger than a distance between the HTUs adjacent to each other in a direction different.

Abstract: A gear machining apparatus includes: a hob cutter; at least one processor; and at least one memory having instructions. The instructions, when executed by the at least one processor, cause the gear machining apparatus to perform operations including: performing first chamfering on a first axial end of a gear profile by relatively moving the hob cutter with respect to a workpiece in radial and axial directions of the workpiece; performing, subsequent to the first chamfering, gear profile machining by relatively moving the hob cutter with respect to the workpiece in the axial direction; and performing, subsequent to the gear profile machining, second chamfering on a second axial end of the gear profile by relatively moving the hob cutter with respect to the workpiece in the radial and axial directions.

Abstract: A heat exchanger includes a pipe made of aluminum, a thermistor, and an attaching portion with which the thermistor is attached to the pipe. The pipe carries a flow of refrigerant. The thermistor detects a temperature of the refrigerant. The pipe includes a sacrificial layer provided on a part of a surface of the pipe. The sacrificial layer is lower in potential than the aluminum of the pipe. The attaching portion is higher in potential than the sacrificial layer. At least one part of the attaching portion is attached to the surface of the pipe where the sacrificial layer is not provided. The attaching portion includes a brazed portion that is higher in potential than the sacrificial layer. The thermistor is attached to the pipe with the brazed portion.

Abstract: The present disclosure provides a light-emitting device that is able to output light with a shorter pulse. A light-emitting device according to the present disclosure includes a capacitor, one or more solid-state light-emitting elements that emit light when electric power is supplied from the capacitor, and a semiconductor switch that controls electric power supply from the capacitor to the solid-state light-emitting element. Furthermore, the solid-state light-emitting element is placed on an outer face of the capacitor, the semiconductor switch is placed on the outer face of the capacitor or provided inside the capacitor, and the capacitor includes a connecting electrode between outer electrodes, the connecting electrode allowing the solid-state light-emitting element and the semiconductor switch to be connected in series.

Abstract: A vehicle exterior part includes a decoration body including a layer structure formed by laminating layers in a front-rear direction, and includes a heater sheet including a transparent sheet base and a heater wire. The decoration body includes a transparent resin layer at a frontmost part of the decoration body and a decorative layer located rearward from the transparent resin layer. The transparent resin layer includes a general portion and an outer edge. A front surface of the general portion includes a general surface. The outer edge includes a bend surface that is curved or angular to a larger extent than the general surface. The sheet base includes a body located in front of the transparent resin layer and an extension extending from a periphery of the body. The body and a portion of the heater wire arranged on the body are located in front of only the general surface.