Abstract: The present invention relates to a headlight magnifier which is worn on an operator's head during a precise manual operation, and allows the operator to magnify and see a work area while illuminating the work area, such that the operator may use the present invention to see the work area in a comfortable position at two magnifications with the help of excellent lighting.

Abstract: The present invention relates to a heat exchanger capable of producing an ice slurry of a process fluid based on a heat exchange between a coolant and the process fluid. The heat exchanger according to the present invention includes a coolant chamber 10 through which a coolant flows, more than one heat transfer tube 20 though which the process fluid flows in a state surrounded by the coolant chamber 10 in order for the coolant to absorb a heat, a vibration member 30 which is vibrated in a state that the vibration member 30 is inserted along the heat transfer tube 20 for thereby separating a frozen coat of the process fluid formed in an inner wall of the heat transfer tube 20, and a vibration unit 40 for vibrating the vibration member 30.