Double pipe icemaker

A double pipe icemaker comprising:

• an inner pipe;
• and
• an outer pipe provided radially outside the inner pipe and coaxially with the inner pipe, the outer pipe being configured to
• allow a cooling target to flow in the inner pipe and
• allow a refrigerant to flow in a space between the inner pipe and the outer pipe;
• at least one nozzle provided in a wall of the outer pipe, the at least one nozzle having a jet port formed in distal end face thereof to jet the refrigerant into the space along a radial direction of the inner pipe;
• at least one refrigerant inlet pipe connected to the at least one nozzle;
• and
• at least one plate shaped shielding plate that is discrete from the at least one nozzle and arranged to be hit by the jetting refrigerant, the at least one shielding plate being provided in the space radially inward of the jet port and having a surface that is closed at a position opposing the jet port in the radial direction of the inner pipe, the surface being parallel to an axial direction of the inner pipe such that the refrigerant hits the at least one shielding plate and expands along the surface in at least one radial direction of the nozzle.

A double pine icemaker comprising:

• an inner pipe;
• and
• an outer pipe provided radially outside the inner pipe and coaxially with the inner pine, the outer pipe being configured to
• allow a cooling target to flow in the inner pipe and
• allow a refrigerant to flow in a space between the inner pine and the outer pipe;
• a plurality of nozzles provided in a wall of the outer pipe, each of the plurality of nozzles being configured to jet the refrigerant into the space;
• and
• a plurality of refrigerant inlet pipes, each of the plurality of refrigerant inlet pipes being connected to a respective one of the nozzles, each of the nozzles and each of the refrigerant inlet pipes being separate pieces attached together, and each of the nozzles having at least one jet port formed in an outer circumference thereof such that the refrigerant jets in at least one radial direction of the nozzle,
• the inner pipe having
• a first end provided with an inlet pipe for the cooling target and
• a second end provided with an outlet pipe for the cooling target,
• the first end and the second end being spaced apart in an axial direction of the inlet pipe and the outlet pipe,
• the plurality of nozzles including at least three nozzles arranged axially along the outer pipe, and
• the nozzles being disposed at pitches gradually increased in size from an inlet pipe side of the outer pipe toward an outlet pipe side of the outer pipe, the inlet pipe side and the outlet pipe side of the outer pipe corresponding to the first end and the second end, respectively, of the inner pine.