Abstract: There is provided a cooler for heater-containing box in which an outside air fan for carrying air on an outside air path and an inside air fan for carrying air on an inside air path are arranged such that a rotating shaft of each fan is in parallel with an air intake direction, and a heat exchanger for exchanging sensible heat of outside air and inside air is arranged between the outside air path and the inside air path such that a suction port at a longitudinal air-path side of the heat exchanger is aligned with a blowout port of the fan. The cooler for heater-containing box capable of making the depth thinner can be provided.

Abstract: A heat exchange type cooling device includes an enclosure, an inside-air passage allowing inside air in the inside of the enclosure to flow through the inside-air passage and returning the flowing inside air to the inside, an outside-air passage allowing outside air at the outside of the enclosure to flow through the outside-air passage and returning the flowing outside air to the outside, an inside-air blower sending the inside air to the inside-air passage, an outside-air blower sending the outside air to the outside-air passage, a heat-exchanging element exchanging heat between the outside air flowing through the outside-air passage and the inside air flowing through the inside-air passage, and a heater for heating the inside air. The outside-air passage is independent from the inside-air passage. The heater is provided upstream of the heat-exchanging element in the inside-air passage.

Abstract: A heating-element accommodating-box cooling apparatus includes: an indoor air passage 5 for fetching air in a heating-element accommodating box and returning it to the heating-element accommodating box; an outdoor air passage 9 for fetching outdoor air and exhausting the fetched outdoor air to the outside; a partition plate 10 provided so that both of the air passages become independent of each other; a fan unit 3 for conveying air in the outdoor air passage 9 and the indoor air passage 5; and a heat exchange element 4 disposed at a point of intersection between the two passages to exchange the sensible heat of the outdoor air and the indoor air, wherein the heating-element accommodating-box cooling apparatus is mounted exteriorly on a panel of the heating-element accommodating box. Consequently, it is possible to effect cooling of the heating-element accommodating box with energy saving, and the space for installation of the cooling apparatus in the box is not required.