Abstract: A ventilator includes a body casing having an opening formed in its lower portion and an exhaust port formed on one side; a fan that is provided in the body casing, for sucking indoor air from the opening and exhausting the indoor air from the exhaust port; a resin fan casing that has a suction port and forms an air passage of the fan; a protection frame formed outside the air passage to cover a terminal block provided outside the air passage; a resin terminal block cover that watertightly seals a protection frame opening of a lower portion of the protection frame and is opened and closed; a sheet-metal case that is provided in the protection frame and stores the terminal block; and a sheet-metal terminal block cover that opens and closes a lower opening of the sheet-metal case.

Abstract: A ventilator includes a body casing having an opening formed in its lower portion and an exhaust port formed on one side; a fan that is provided in the body casing, for sucking indoor air from the opening and exhausting the indoor air from the exhaust port; a resin fan casing that has a suction port and forms an air passage of the fan; a protection frame formed outside the air passage to cover a terminal block provided outside the air passage; a resin terminal block cover that watertightly seals a protection frame opening of a lower portion of the protection frame and is opened and closed; a sheet-metal case that is provided in the protection frame and stores the terminal block; and a sheet-metal terminal block cover that opens and closes a lower opening of the sheet-metal case.

Abstract: A ventilator includes a body casing having an opening formed in its lower portion and an exhaust port formed on one side; a fan that is provided in the body casing, for sucking indoor air from the opening and exhausting the indoor air from the exhaust port; a resin fan casing that has a suction port and forms an air passage of the fan; a protection frame formed outside the air passage to cover a terminal block provided outside the air passage; a resin terminal block cover that watertightly seals a protection frame opening of a lower portion of the protection frame and is opened and closed; a sheet-metal case that is provided in the protection frame and stores the terminal block; and a sheet-metal terminal block cover that opens and closes a lower opening of the sheet-metal case.

Abstract: A ventilator includes a body casing having an opening formed in its lower portion and an exhaust port formed on one side; a fan that is provided in the body casing, for sucking indoor air from the opening and exhausting the indoor air from the exhaust port; a resin fan casing that has a suction port and forms an air passage of the fan; a protection frame formed outside the air passage to cover a terminal block provided outside the air passage; a resin terminal block cover that watertightly seals a protection frame opening of a lower portion of the protection frame and is opened and closed; a sheet-metal case that is provided in the protection frame and stores the terminal block; and a sheet-metal terminal block cover that opens and closes a lower opening of the sheet-metal case.

Abstract: A blowing apparatus includes a suction passage having a suction chamber enclosed by rigid body surfaces, suction ports opening toward the suction chamber for sucking air from outside, and a fan suction port serving as a suction port for a blower, the suction ports, the suction chamber, and the fan suction port being arranged in nonlinear form. In such blowing apparatus, a doughnut-like straightening guide is arranged on an opening edge on the suction chamber side of the fan suction port. The straightening guide has a projection toward the suction chamber, an appropriate thickness in the radial direction, and a guide passage matching the fan suction port in the middle thereof.