Abstract: The pipe connector (60) includes pipes each having a flange at an end portion thereof, and a base (65). The base is formed with insertion portions (65b, 65c) in which the pipes are inserted and seating surfaces (68, 69) formed at a rim of the insertion portion and contacting on the flanges so as to axially fix the pipes. The seating surfaces (68, 69) of the base are apart from each other by more than a thickness of the flanges (66, 67) in the axial position of the pipes (61, 62) such that the axial positions of the flanges are out of alignment with each other.

Abstract: A structure connects a first member and a second member. The first member has a peripheral wall portion that includes a stepped portion that is engaged with the second member. The peripheral wall portion is a deformed portion that is deformed inwardly of the stepped portion of the first member. The deformed portion has a thin shape that is provided by a cut section of the peripheral wall portion.

Abstract: A forked part structure of a double pipe has an outer pipe, an inner pipe, a branch pipe and an open end portion of the outer pipe. The open end portion of the outer pipe has a substantially tubular inner pipe supporting portion to which the inner pipe is brazed, and a substantially tubular branch pipe supporting portion to which the branch pipe is brazed. The inner pipe supporting portion is located inward of a main portion of the outer pipe along an extending direction of the main portion of the outer pipe.

Abstract: A pipe connection structure including a pipe having a pipe body, a end portion on a end side of the pipe body, and a collar extended radially outwardly from the end portion; and a block having a passage into which the end portion is inserted, a recess formed in an open end of the passage for receiving the collar, and a peripheral wall of the recess deformed inwardly and fitted onto the collar. The largest outside diameter portion of the collar is decentered toward a bottom surface of the recess.

Abstract: A tube having a multi-channel tube and branch tubes, a connection structure thereof and a connection method therefor are disclosed. The tube is provided with: a multi-channel tube including a partition wall to partition an interior of the multi-channel tube into plural channels and an expanded end portion ; branch tubes inserted into the expanded end portion and respectively communicating with the channels; and clearances for being filled with brazing metal, which are respectively kept between the multi-channel tube and each of the branch tubes.

Abstract: The air-conditioner includes a compressor configured to compress and discharge a refrigerant. The air-conditioner includes a condenser configured to cool the refrigerant with air outside of a vehicle compartment. The air-conditioner includes a throttle configured to expand the refrigerant. The air-conditioner includes an evaporator configured to cool air inside of the vehicle compartment to eliminate moisture from the air by the expanded refrigerant. The air-conditioner includes a first refrigerant passage having the condensed refrigerant between the condenser and the throttle. The air-conditioner includes a second refrigerant passage having the evaporated refrigerant between the evaporator and the compressor. The air-conditioner includes a refrigerant pipe located between the first and second passages and configured to exchange heat between the condensed and evaporated refrigerants.

Abstract: A flexible hose for use as a refrigerant passageway in a vehicular refrigerating cycle has an inner hose and an outer hose. The outer hose covers the inner hose with a space formed in a given distance. The outer hose and the inner hose are formed of resin having flexibility.

Abstract: A pipe connection structure including a pipe having a pipe body, a end portion on a end side of the pipe body, and a collar extended radially outwardly from the end portion; and a block having a passage into which the end portion is inserted, a recess formed in an open end of the passage for receiving the collar, and a peripheral wall of the recess deformed inwardly and fitted onto the collar. The largest outside diameter portion of the collar is decentered toward a bottom surface of the recess.

Abstract: A forked part structure of a double pipe has an outer pipe, an inner pipe, a branch pipe and an open end portion of the outer pipe. The open end portion of the outer pipe has a substantially tubular inner pipe supporting portion to which the inner pipe is brazed, and a substantially tubular branch pipe supporting portion to which the branch pipe is brazed. The inner pipe supporting portion is located inward of a main portion of the outer pipe along an extending direction of the main portion of the outer pipe.

Abstract: A duplex pipe (10) is cut with a cutting tool (30), for cutting connecting ribs (13) from the end face of the duplex pipe (10) which is held with an outer pipe (11) chucked (rib cutting step). The duplex pipe (10) is cut from the end face of the duplex pipe (10) up to the portion thereof corresponding to the exposed length of the inner pipe (12) to thereby form a slit (21) in the outer pipe (11) and connecting ribs (13) (slit forming step). The cutting tool (30) has a guide hole (31) into which the inner pipe (12) can be inserted while guiding the inner pipe outer peripheral surface (12a), a cutting device (32) for cutting the connecting ribs (13), and a guide pin (33) which can be inserted into the inner pipe (12) while guiding the inner pipe inner peripheral surface (12b).

Abstract: An air-conditioning apparatus for a vehicle wherein noise in the passenger's compartment is reduced by suppressing transmission of vibration to the evaporator, and the prevention of coolant leakage is enhanced, and at the same time, the man-hours for inspection are reduced by reducing the number of pipe joints. The cooling capacity is also enhanced by replacing the sub-cooling process in the condenser and the super-heating process in the evaporator, and further space in the narrow engine compartment is effectively used.

Abstract: The air-conditioner includes a compressor configured to compress and discharge a refrigerant. The air-conditioner includes a condenser configured to cool the refrigerant with air outside of a vehicle compartment. The air-conditioner includes a throttle configured to expand the refrigerant. The air-conditioner includes an evaporator configured to cool air inside of the vehicle compartment to eliminate moisture from the air by the expanded refrigerant. The air-conditioner includes a first refrigerant passage having the condensed refrigerant between the condenser and the throttle. The air-conditioner includes a second refrigerant passage having the evaporated refrigerant between the evaporator and the compressor. The air-conditioner includes a refrigerant pipe located between the first and second passages and configured to exchange heat between the condensed and evaporated refrigerants.

Abstract: A joint 50 for duplex pipes is to connect to a duplex pipe 100 where an outer pipe 101, an inner pipe 102, and ribs 103 are unitized to be the duplex pipe 100 as one body through an extruding process or a drawing process, having a main body 110 which is provided at its one end to an end portion 101a of the outer pipe exposing the inner pipe 102 by partially eliminating the outer pipe 101, a wall face part 112 equipped at the other end of the main body 110 for penetrating the exposed inner pipe 102, and a connecting pipe 120 provided in the opening 113. An opening is formed at places to be determined in response to disposing conditions of the connecting pipes.

Abstract: A structure for connecting a first member and a second member, has a first member having a peripheral wall portion including a stepped portion engaged with a second member. The peripheral wall portion is a deformed portion deformed inwardly of the stepped portion of the first member. The deformed portion has a thin shape provided by a cut section of the peripheral wall portion.

Abstract: A flexible hose for use as a refrigerant passageway in a vehicular refrigerating cycle has an inner hose and an outer hose. The outer hose covers the inner hose with a space formed in a given distance. The outer hose and the inner hose are formed of resin having flexibility.

Abstract: The invention relates to a receiver-drier for use in an air conditioning system. This receiver-drier has (a) a lower portion defining a lower chamber in the receiver-drier; (b) an upper portion defining an upper chamber in the receiver-drier; and (c) a strainer for removing foreign particles from the refrigerant. The lower portion has an inlet for allowing the refrigerant to flow into the lower chamber and an outlet for allowing the refrigerant to flow out of the lower chamber. Each of the inlet and the outlet is formed at a bottom of the lower portion. The upper chamber is on top of the lower chamber and is charged with a desiccant for removing moisture from the refrigerant. The strainer is disposed at a position in a flow of the refrigerant from the inlet to the outlet.

Abstract: A duplex pipe (10) is cut with a cutting tool (30), for cutting connecting ribs (13) from the end face of the duplex pipe (10) which is held with an outer pipe (11) chucked (rib cutting step). The duplex pipe (10) is cut from the end face of the duplex pipe (10) up to the portion thereof corresponding to the exposed length of the inner pipe (12) to thereby form a slit (21) in the outer pipe (11) and connecting ribs (13) (slit forming step). The cutting tool (30) has a guide hole (31) into which the inner pipe (12) can be inserted while guiding the inner pipe outer peripheral surface (12a), a cutting device (32) for cutting the connecting ribs (13), and a guide pin (33) which can be inserted into the inner pipe (12) while guiding the inner pipe inner peripheral surface (12b).

Abstract: Firstly, using a cutting tool 30, connecting ribs 13 are cut off from the end face of a duplex pipe 10 which is held with an outer pipe 11 chucked (rib cutting step). Next, the duplex pipe 10 is cut at and from the end face of the duplex pipe 10 up to the portion thereof corresponding to the exposed length of the inner pipe 12 to thereby form a slit 21 in the outer pipe 11 and connecting ribs 13 (slit forming step) The cutting tool 30 comprises a guide hole 31 into which the inner pipe 12 can be inserted while guiding the inner pipe outer peripheral surface 12a, a cutting device 32 for cutting the connecting ribs 13, and a guide pin 33 which is disposed in the guide hole 31 and can be inserted into the inner pipe 12 while guiding the inner pipe inner peripheral surface 12b.

Abstract: The invention relates to a receiver-drier for use in an air conditioning system. This receiver-drier has (a) a lower portion defining a lower chamber in the receiver-drier; (b) an upper portion defining an upper chamber in the receiver-drier; and (c) a strainer for removing foreign particles from the refrigerant. The lower portion has an inlet for allowing the refrigerant to flow into the lower chamber and an outlet for allowing the refrigerant to flow out of the lower chamber. Each of the inlet and the outlet is formed at a bottom of the lower portion. The upper chamber is on top of the lower chamber and is charged with a desiccant for removing moisture from the refrigerant. The strainer is disposed at a position in a flow of the refrigerant from the inlet to the outlet.

Abstract: A refrigerating cycle has a condenser, an evaporator, a variable displacement compressor, and an expansion valve. The variable displacement compressor is connected between the condenser and the evaporator to form the refrigerating cycle, and includes a control valve designed to provide a control valve characteristic sloping downward with increase in a discharge pressure. The expansion valve is connected between the condenser and the evaporator, to return a refrigerant from the condenser through the evaporator to the variable displacement compressor, and designed to provide an open valve characteristic whose slope is approximately equal to the downward slope of the control valve characteristic.