Refrigeration apparatus and refrigerant pipe of the same refrigeration apparatus

A refrigerant pipe of a refrigeration apparatus, the refrigerant pipe comprising:

• a first pipe, made of stainless steel, through which a refrigerant flows;
• a joint pipe, made of copper or copper alloy, disposed on an outer peripheral surface of the first pipe, and that comprises:
• a small-diameter portion;
• a large-diameter portion having a pipe diameter greater than that of the small-diameter portion;
• and
• an inclined portion connecting the large-diameter portion to the small-diameter portion;
• and
• a second pipe, having a diameter smaller than a diameter of the first pipe, connected to the outer peripheral surface of the first pipe via the joint pipe, wherein
• the small-diameter portion of the joint pipe is inserted into an opening of the first pipe,
• the second pipe is inserted into the large-diameter portion of the joint pipe,
• a surface of the second pipe at which the second pipe is connected to the joint pipe is made of a material identical to the material of the joint pipe,
• the inclined portion of the joint pipe has:
• an outer peripheral surface that constitutes a first positioning mechanism:
• at which the joint pipe contacts an edge of the opening of the first pipe, and
• that sets a position of the joint pipe with respect to the first pipe;
• and
• an inner peripheral surface that constitutes a second positioning mechanism:
• at which the joint pipe contacts the second pipe, and
• that sets a position of the second pipe with respect to the joint pipe, and
• the first pipe is a refrigerant pipe that causes a refrigerant to flow between a plurality of components constituting a refrigerant circuit.