Abstract: Provided is a diagnostic apparatus, including a diagnostic unit configured to diagnose a condition of a vortex flowmeter using a determination result of a magnitude of a signal component of each of at least one target detection signal among the at least one detection signal detected by the vortex flowmeter having a vortex generator and a detection unit configured to detect at least one detection signal according to a vortex generated by the vortex generator, or a magnitude of a signal component of at least one of combined signals configured to linearly combine two or more of the at least one detection signal.

Abstract: Provided is a diagnostic apparatus, including a diagnostic unit configured to diagnose a condition of a vortex flowmeter using a determination result of a magnitude of a signal component of each of at least one target detection signal among the at least one detection signal detected by the vortex flowmeter having a vortex generator and a detection unit configured to detect at least one detection signal according to a vortex generated by the vortex generator, or a magnitude of a signal component of at least one of combined signals configured to linearly combine two or more of the at least one detection signal.

Abstract: A parallel-flow type heat exchanger (1) is provided with two vertical-direction header pipes (2, 3), and a plurality of horizontal-direction flat tubes (4) that connect the header pipes with each other. The plurality of horizontal direction flat tubes are divided into a plurality of groups each comprising a plurality of flat tubes, and each of the groups constitutes a coolant path that lets coolant flow from one vertical-direction header pipe to the other. The upper limit for the number of flat tubes that constitute a coolant path for one turn is obtained from a prescribed numerical formula.

Abstract: A heat exchanger (1) is provided with two header pipes (2, 3) arranged parallel to each other with a spacing therebetween, flat tubes (4) arranged between the header pipes (2, 3) and having refrigerant paths (5) provided therein and connected to the insides of the header pipes (2, 3), and corrugated fins (6) arranged between the flat tubes (4). That end of each corrugated fin (6) which is on that surface of the heat exchanger (1) which is on the side on which condensed water collects is made to protrude from ends of the flat tubes (4), and linear water leading members (10) are inserted between gaps (G) between the protrusions. The water leading members (10) are inserted from ends of the corrugated fins (6) toward the flat tube side into a range in which surface tension can act.

Abstract: The heat exchanger (1) comprises: two header pipes (2),(3) arranged in parallel with an interval therebetween; a plurality of flat tubes (4) which are arranged between the header pipes and which place coolant paths (5) provided therein in communication with the interior of the header pipes; a plurality of fins (6) attached to the flat surface of each flat tube; and side sheets (10U), (10D) attached to an outside of the fins (6aU), (6aD), which are positioned farthest outward among the plurality of fins. The side sheet (10D) positioned in the bottom part of the heat exchanger (1) has a plurality of notches (11) formed at intervals from each other on the edge of the side where condensed water collects in the heat exchanger (1). The notches are each provided with a width sufficient for covering the interval pitch (P) of the fin by several pitch lengths.

Abstract: A heat exchanger (1) is provided with two header pipes (2, 3) arranged parallel to each other with a spacing therebetween, flat tubes (4) arranged between the header pipes (2, 3) and having refrigerant paths (5) provided therein and connected to the insides of the header pipes (2, 3), and corrugated fins (6) arranged between the flat tubes (4). That end of each corrugated fin (6) which is on that surface of the heat exchanger (1) which is on the side on which condensed water collects is made to protrude from ends of the flat tubes (4), and linear water leading members (10) are inserted between gaps (G) between the protrusions. The water leading members (10) are inserted from ends of the corrugated fins (6) toward the flat tube side into a range in which surface tension can act.

Abstract: A heat exchanger 1A has: two header pipes 2 and 3 arranged parallel at an interval; a plurality of flat tubes 4 arranged between the header pipes 2 and 3 with refrigerant passages 5 inside them communicating with the inside of the header pipes 2 and 3; and corrugated fins 6 arranged between adjacent flat tubes 4. To outward facing flat surfaces of, of the plurality of flat tubes 4, those located outermost, outermost corrugated fins 6a having pleats in the shape of a louver are fitted.

Abstract: A transmitter and a method for testing the transmitter which allow easy testing for a failure in the detection processing unit thereof, thereby reducing required manpower and cost, are provided. The transmitter is provided with a detection processing unit for detecting a process variable and processing an electric signal which is based on the process variable. The transmitter is characterized by containing a test unit for generating a malfunctioning state of the detection processing unit for the testing.

Abstract: A transmitter and a method for testing the transmitter which allow easy testing for a failure in the detection processing unit thereof, thereby reducing required manpower and cost, are provided. The transmitter is provided with a detection processing unit for detecting a process variable and processing an electric signal which is based on the process variable. The transmitter is characterized by containing a test unit for generating a malfunctioning state of the detection processing unit for the testing.

Abstract: A transmitter and a method for testing the transmitter which allow easy testing for a failure in the detection processing unit thereof, thereby reducing required manpower and cost, are provided. The transmitter is provided with a detection processing unit for detecting a process variable and processing an electric signal which is based on the process variable. The transmitter is characterized by containing a test unit for generating a malfunctioning state of the detection processing unit for the testing.