{
  "$type": "site.standard.document",
  "coverImage": {
    "$type": "blob",
    "ref": {
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    "mimeType": "image/png",
    "size": 86759
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  "description": "There is provided a construction machine including an electrically driven motor that serves as a power source, a heat exchanger, a fuel cell that generates power to be provided to the electrically driven motor, a cooling fan that blows cooling air to the heat exchanger, and a fan controller that…",
  "path": "/patents/1379238",
  "publishedAt": "2026-03-12T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60L50/70",
    "Hitachi Construction Machinery Co., Ltd."
  ],
  "textContent": "There is provided a construction machine including an electrically driven motor that serves as a power source, a heat exchanger, a fuel cell that generates power to be provided to the electrically driven motor, a cooling fan that blows cooling air to the heat exchanger, and a fan controller that controls rotation of the cooling fan. In the construction machine, a hydrogen gas detection sensor is provided in a machine room in which the heat exchanger, the fuel cell, and the cooling fan are disposed, and the fan controller raises a rotation speed of the cooling fan when the hydrogen gas detection sensor has detected a hydrogen gas.",
  "title": "Construction Machine"
}