A method for manufacturing a welded molding made of liquid crystal polyester as a formation material is provided, the method including: a step of heating each of a first ridge portion of a first member made of the liquid crystal polyester as a formation material and a second ridge portion of a second member made of the liquid crystal polyester as a formation material to a temperature equal to or higher than a flow start temperature of the liquid crystal polyester; and a step of abutting the first ridge portion and the second ridge portion to each other to perform vibration welding while pressing the first ridge portion and the second ridge portion in a direction in which the first ridge portion and the second ridge portion are brought relatively close to each other.

A method for manufacturing a welded molding made of liquid crystal polyester as a formation material is provided, the method including: a step of heating each of a first ridge portion of a first member made of the liquid crystal polyester as a formation material and a second ridge portion of a second member made of the liquid crystal polyester as a formation material to a temperature equal to or higher than a flow start temperature of the liquid crystal polyester; and a step of abutting the first ridge portion and the second ridge portion to each other to perform vibration welding while pressing the first ridge portion and the second ridge portion in a direction in which the first ridge portion and the second ridge portion are brought relatively close to each other.

A plate-type refrigerant pipe includes: a first plate; and a second plate. The first plate and the second plate are joined to form a refrigerant flow path. The first plate includes a first connection portion to which a first refrigerant pipe is connected and that causes the refrigerant flow path to communicate with the first refrigerant pipe. The second plate includes a second connection portion to which a second refrigerant pipe is connected and that causes the refrigerant flow path to communicate with the second refrigerant pipe. One or both of the first plate and the second plate include a third connection portion to which a third refrigerant pipe is connected and that causes the refrigerant flow path to communicate with the third refrigerant pipe.

A plate-type refrigerant pipe includes: a first plate made of stainless steel; a second plate made of stainless steel; and a coupling pipe, made of a material that is different from stainless steel, attached to one or both of the first plate and the second plate. The first plate and the second plate are joined to form a refrigerant flow path. The coupling pipe is connected to a refrigerant pipe at a connecting surface of refrigerant pipe. The material of the coupling pipe is identical to a material of the connecting surface of the refrigerant pipe.

A plate-type refrigerant pipe includes: a first plate; and a second plate. The first plate and the second plate are joined to form a refrigerant flow path. The first plate includes a first recessed groove that forms at least part of the refrigerant flow path and that has an arc shape in a cross section of the refrigerant flow path. A center of the arc shape of the first recessed groove is on a side of the first plate with respect to a joining surface where the first plate and the second plate are joined.

A water delivery device includes a first conduit section and a second conduit section rotatably coupled to the first conduit section by a magnetic joint. The magnetic joint includes a plurality of magnets that cooperatively define a plurality of rotational positions between the first conduit section and the second conduit section.

A water delivery device includes a first conduit section and a second conduit section rotatably coupled to the first conduit section by a magnetic joint. The magnetic joint includes a plurality of magnets that cooperatively define a plurality of rotational positions between the first conduit section and the second conduit section.

A drainage system (1) comprising: at least one water receiving unit (20) having: a water receptacle (22) for receiving water from an adjoining surface; a first neck piece (24) which can be connected to the water receptacle (22) and provided such that water can flow out of the water receiving unit (20) through an opening (26) of the first neck piece (24); and at least one water drainage unit (40) for draining the water, comprising: a pipe body (42); and a first opening (46b), provided on the pipe body (42), for receiving the water in said pipe body (42); wherein: the water drainage unit (40) can be provided and oriented under the surface such j that the opening (26) of the first neck piece (24) and the first opening (46b) of the pipe body (42) can be connected and the water flowing out of the water receiving unit (20) can flow into the water drainage unit (40). Also disclosed are drainage units and methods.

A drainage system (1) comprising: at least one water receiving unit (20) having: a water receptacle (22) for receiving water from an adjoining surface; a first neck piece (24) which can be connected to the water receptacle (22) and provided such that water can flow out of the water receiving unit (20) through an opening (26) of the first neck piece (24); and at least one water drainage unit (40) for draining the water, comprising: a pipe body (42); and a first opening (46b), provided on the pipe body (42), for receiving the water in said pipe body (42); wherein: the water drainage unit (40) can be provided and oriented under the surface such j that the opening (26) of the first neck piece (24) and the first opening (46b) of the pipe body (42) can be connected and the water flowing out of the water receiving unit (20) can flow into the water drainage unit (40). Also disclosed are drainage units and methods.

A resin piping assembly including a base divisional component having first and second half components having respective first and second interfacial surfaces formed along an oil passage, and first and second divisional components which have respective third and fourth interfacial surfaces formed along the oil passage, and which are bonded to the respective first and second half components. Each of the base divisional component, and the first and second divisional components is formed of a resin material, and the first and second interfacial surfaces are spaced apart from each other, and open in respective opposite directions. The base divisional component further includes a cylindrical connecting pipe portion having a connecting passage portion which is a part of the oil passage and which is provided for communication between the first and second passage portions. Also disclosed is a process of forming the resin piping assembly.