Abstract: A method monitors an air-conditioner having a semi-conductor gas sensor, the method including: determining that a refrigerant leakage has occurred on condition that the detection value is equal to or greater than a first threshold when the fan is in operation; starting operation of the fan as a provisional operation if the detection value is equal to or greater than a second threshold when the fan is not in operation; stopping the provisional operation of the fan; determining that a refrigerant leakage has occurred on condition that the detection value is equal to or greater than a third threshold after stopping the provisional operation of the fan; and taking a predetermined action for outputting alarm information and/or limiting supply of refrigerant to the heat exchanger when a refrigerant leakage is determined to have occurred.

Abstract: A connection structure between a printed circuit board and a terminal block includes: an insertion portion at one end of the printed circuit board with a pattern disposed thereon; a terminal-block main body including a receiving port that receives the insertion portion; a nut held in the terminal-block main body; and a screw tightened into the nut. The pattern is interposed between the screw and the nut when the insertion portion is inserted into the receiving port.

Abstract: A terminal block includes: a first split body that includes one or more terminal connection parts and a first coupling portion; a second split body that includes one or more terminal connection parts and a second coupling portion coupled to the first coupling portion; and a coupling member that couples the first coupling portion to the second coupling portion and fixes the first split body and the second split body to a mount to which the terminal block is mounted.

Abstract: An air conditioner includes a power source that supplies AC voltage and a wiring plug-in coupler connected to the power source. The wiring plug-in coupler is connected to a portion of the power source to which a first functional component, which is actuated by the AC voltage in cooperation with the air conditioner, is connected, supplies voltage to a second functional component actuated by DC voltage in cooperation with the air conditioner, and is connected with an input terminal of a converter that converts AC voltage to DC voltage and supplies the converted DC voltage to the second functional component.

Abstract: A thermal flow velocity and flow rate sensor includes: a substrate; a heater mounted on the substrate; a temperature measuring element mounted on the substrate; a joint portion made of a resin filled between the heater and the temperature measuring element and thermally connecting the heater and the temperature measuring element; a lead wire connected to the substrate; and a fastener fixing the lead wire to the substrate. The lead wire is soldered to the substrate. The lead wire and the fastener are coated with the resin.

Abstract: An air conditioner includes a power source that supplies AC voltage and a wiring plug-in coupler connected to the power source. The wiring plug-in coupler is connected to a portion of the power source to which a first functional component, which is actuated by the AC voltage in cooperation with the air conditioner, is connected, supplies voltage to a second functional component actuated by DC voltage in cooperation with the air conditioner, and is connected with an input terminal of a converter that converts AC voltage to DC voltage and supplies the converted DC voltage to the second functional component.

Abstract: A thermal flow velocity and flow rate sensor includes: a substrate; a heater mounted on the substrate; a temperature measuring element mounted on the substrate; a joint portion made of a resin filled between the heater and the temperature measuring element and thermally connecting the heater and the temperature measuring element; a lead wire connected to the substrate; and a fastener fixing the lead wire to the substrate. The lead wire is soldered to the substrate. The lead wire and the fastener are coated with the resin.

Abstract: A method monitors an air-conditioner having a semi-conductor gas sensor, the method including: determining that a refrigerant leakage has occurred on condition that the detection value is equal to or greater than a first threshold when the fan is in operation; starting operation of the fan as a provisional operation if the detection value is equal to or greater than a second threshold when the fan is not in operation; stopping the provisional operation of the fan; determining that a refrigerant leakage has occurred on condition that the detection value is equal to or greater than a third threshold after stopping the provisional operation of the fan; and taking a predetermined action for outputting alarm information and/or limiting supply of refrigerant to the heat exchanger when a refrigerant leakage is determined to have occurred.

Abstract: A refrigerant cycle apparatus includes a refrigerant circuit that circulates a refrigerant, and a leak sensor that detects a refrigerant leaking from the refrigerant circuit, in which the refrigerant cycle apparatus includes, as an operating mode, a recovery mode for recognizing occurrence of an abnormality in the leak sensor and recovering a refrigerant to a predetermined location in the refrigerant circuit.

Abstract: A connection structure between a printed circuit board and a terminal block includes: an insertion portion at one end of the printed circuit board with a pattern disposed thereon; a terminal-block main body including a receiving port that receives the insertion portion; a nut held in the terminal-block main body; and a screw tightened into the nut. The pattern is interposed between the screw and the nut when the insertion portion is inserted into the receiving port.

Abstract: A terminal block includes: a first split body that includes one or more terminal connection parts and a first coupling portion; a second split body that includes one or more terminal connection parts and a second coupling portion coupled to the first coupling portion; and a coupling member that couples the first coupling portion to the second coupling portion and fixes the first split body and the second split body to a mount to which the terminal block is mounted.

Abstract: A first wiring pattern formed on a first layer of a multilayer wiring substrate, a second wiring pattern formed on a layer different from the first layer on which the first wiring pattern is formed, a penetration hole penetrating the front surface and the back surface of the substrate, and a penetration hole penetrating a front surface and a back surface of the substrate; and a fitting connector having a conductor part on a side surface inscribed in the penetration hole and fitting into the penetration hole are provided. The first wiring pattern and the second wiring pattern are exposed from the internal surface of the penetration hole, and the fitting connector connects a first end part of the conductor part and a second end part with an exposed part of the first wiring pattern and an exposed part of the second wiring pattern, respectively.

Abstract: A first wiring pattern formed on a first layer of a multilayer wiring substrate, a second wiring pattern formed on a layer different from the first layer on which the first wiring pattern is formed, a penetration hole penetrating the front surface and the back surface of the substrate, and a penetration hole penetrating a front surface and a back surface of the substrate; and a fitting connector having a conductor part on a side surface inscribed in the penetration hole and fitting into the penetration hole are provided. The first wiring pattern and the second wiring pattern are exposed from the internal surface of the penetration hole, and the fitting connector connects a first end part of the conductor part and a second end part with an exposed part of the first wiring pattern and an exposed part of the second wiring pattern, respectively.

Abstract: A release auxiliary device (6) includes a base member (51) fixedly provided with respect to a receptacle (11), and an auxiliary lever (52) provided in an elastically deformable manner with respect to the base member (51). The auxiliary lever (52) has a base part (61) extending to the base member (51), a pressing part that extends to the base part and is touchable to an end portion of a lever (41), and an operating part (63) that extends to the pressing part and is disposed at a position closer to the body of the plug than the end portion of the lever is. By operating the operating part (63) with fingers, the pressing part (62) presses against the end portion of the lever (41) and moves the same, so that the engagement between engaging portions (42, 28) for retention can be released.

Abstract: A release auxiliary device (6) includes a base member (51) fixedly provided with respect to a receptacle (11), and an auxiliary lever (52) provided in an elastically deformable manner with respect to the base member (51). The auxiliary lever (52) has a base part (61) extending to the base member (51), a pressing part that extends to the base part and is touchable to an end portion of a lever (41), and an operating part (63) that extends to the pressing part and is disposed at a position closer to the body of the plug than the end portion of the lever is. By operating the operating part (63) with fingers, the pressing part (62) presses against the end portion of the lever (41) and moves the same, so that the engagement between engaging portions (42, 28) for retention can be released.

Abstract: A press-fit pin connection checking method using a first printed circuit board having a plurality of through holes in which a plurality of press-fit pins of a first press-fit connector are adapted to be respectively press-fitted, and a checking conductor pattern formed so as to be electrically insulated from all of the through holes and to, surround all of the through holes for engagement with the first press-fit connector. The press-fit pin connection checking method includes the steps of mounting the first press-fit connector on the first printed circuit board, providing a checking jig having a second printed circuit board and a second press-fit connector mounted on the second printed circuit board, engaging the second press-fit connector of the checking jig with the first press-fit connector, and selectively connecting the checking conductor pattern of the first printed circuit board to output lands of the checking jig.

Abstract: A press-fit pin connection checking method using a first printed circuit board having a plurality of through holes in which a plurality of press-fit pins of a first press-fit connector are adapted to be respectively press-fitted, and a checking conductor pattern formed so as to be electrically insulated from all of the through holes and to surround all of the through holes for engagement with the first press-fit connector. The press-fit pin connection checking method includes the steps of mounting the first press-fit connector on the first printed circuit board, providing a checking jig having a second printed circuit board and a second press-fit connector mounted on the second printed circuit board, engaging the second press-fit connector of the checking jig with the first press-fit connector, and selectively connecting the checking conductor pattern of the first printed circuit board to output lands of the checking jig.