Ventilation unit

{
  "publication_number": "US11811081B2",
  "country": "US",
  "kind": "B2",
  "title": "Ventilation unit",
  "abstract": "A ventilation unit with: a ventilation body that allows gas to circulate between the outside and inside of a housing; a support member that supports the body attached to an opening portion formed in the housing; and a sealing member between the support member and the outer surface around the housing opening portion and seals a gap between the support member and the housing, wherein the unit performs ventilation between the outside and inside of the housing through the body while attached to the opening portion of the housing. The support member includes: an attachment portion to which the sealing member is attached; and a wall portion around the attachment portion, wherein, in a state where the support member is attached between the support member and the housing, a distance between the support member and an external surface in the support member wall portion is 5.0 mm or more.",
  "claims": [
    "1. A ventilation unit comprising: a ventilation body configured to allow gas to circulate between outside and inside of a housing; a support supporting the ventilation body and configured to be attached to an opening in the housing; and a seal configured to be between an outer surface of the housing around the opening and the support to seal a gap between the outer surface and the support, wherein the support includes an attachment portion to which the seal is attached and a wall surrounding the attachment portion, and the ventilation unit is configured so that a distance between the seal and an external surface of the wall is 5.0 mm or more when the ventilation unit is attached to the housing.",
    "2. The ventilation unit according to claim 1, wherein a portion of the wall facing the outer surface is parallel to the outer surface, and the external surface is perpendicular to the outer surface.",
    "3. The ventilation unit according to claim 1, wherein the ventilation unit is configured so that a distance between a portion in the wall facing the outer surface and the outer surface is 0.05 mm to 2.0 mm.",
    "4. The ventilation unit according to claim 2, wherein the ventilation unit is configured so that a distance between the portion of the wall facing the outer surface of the housing and the outer surface is 0.05 mm to 2.0 mm.",
    "5. The ventilation unit according to claim 1, wherein the seal is annular and has a wire diameter of 2.4 mm.",
    "6. The ventilation unit according to claim 2, wherein the seal is annular and has a wire diameter of 2.4 mm.",
    "7. The ventilation unit according to claim 3, wherein the seal is annular and has a wire diameter of 2.4 mm.",
    "8. The ventilation unit according to claim 4, wherein the seal is annular and has a wire diameter of 2.4 mm.",
    "9. The ventilation unit according to claim 1, further comprising: a ventilation member configured to allow gas to flow from the inside of the housing to the outside of the housing when an internal pressure of the housing is higher than an external pressure by not less than a predetermined value, and configured to block the gas from flowing when a difference between the internal pressure and the external pressure is less than the predetermined value.",
    "10. The ventilation unit according to claim 2, further comprising: a ventilation member configured to allow gas to flow from the inside of the housing to the outside of the housing when an internal pressure of the housing is higher than an external pressure by not less than a predetermined value, and configured to block the gas from flowing when a difference between the internal pressure and the external pressure is less than the predetermined value.",
    "11. The ventilation unit according to claim 3, further comprising: a ventilation member configured to allow gas to flow from the inside of the housing to the outside of the housing when an internal pressure of the housing is higher than an external pressure by not less than a predetermined value, and configured to block the gas from flowing when a difference between the internal pressure and the external pressure is less than the predetermined value.",
    "12. The ventilation unit according to claim 4, further comprising: a ventilation member configured to allow gas to flow from the inside of the housing to the outside of the housing when an internal pressure of the housing is higher than an external pressure by not less than a predetermined value, and configured to block the gas from flowing when a difference between the internal pressure and the external pressure is less than the predetermined value.",
    "13. The ventilation unit according to claim 5, further comprising: a ventilation member configured to allow gas to flow from the inside of the housing to the outside of the housing when an internal pressure of the housing is higher than an external pressure by not less than a predetermined value, and configured to block the gas from flowing when a difference between the internal pressure and the external pressure is less than the predetermined value.",
    "14. The ventilation unit according to claim 6, further comprising: a ventilation member configured to allow gas to flow from the inside of the housing to the outside of the housing when an internal pressure of the housing is higher than an external pressure by not less than a predetermined value, and configured to block the gas from flowing when a difference between the internal pressure and the external pressure is less than the predetermined value.",
    "15. The ventilation unit according to claim 7, further comprising: a ventilation member configured to allow gas to flow from the inside of the housing to the outside of the housing when an internal pressure of the housing is higher than an external pressure by not less than a predetermined value, and configured to block the gas from flowing when a difference between the internal pressure and the external pressure is less than the predetermined value.",
    "16. The ventilation unit according to claim 8, further comprising: a ventilation member configured to allow gas to flow from the inside of the housing to the outside of the housing when an internal pressure of the housing is higher than an external pressure by not less than a predetermined value, and configured to block the gas from flowing when a difference between the internal pressure and the external pressure is less than the predetermined value.",
    "17. The ventilation unit according to claim 9, wherein the ventilation body allows gas to circulate between the inside of the housing and the outside of the housing while the difference between the internal pressure and the external pressure is less than the predetermined value.",
    "18. The ventilation unit according to claim 1, wherein the support includes a surface between the seal and the opening that is configured to abut the housing."
  ],
  "description_excerpt": "The present invention relates to a ventilation unit.\n\nConventionally, a ventilation component allowing passage of air between the inside and outside of a case in an electrical component, such as a battery pack for a vehicle, has been suggested.\n\nFor example, a ventilation component described in Patent Document 1 includes: an explosion-proof valve case formed of a synthetic resin, and forming an annular ring shape; an O-ring sealing between the explosion-proof valve case and a pack case; a circular sheet-like ventilation membrane attached to the case so as to close a central opening of the explosion-proof valve case; and a circular plate-like protector formed of a synthetic resin, and overlapped and arranged outside the ventilation membrane.\n\nIn a ventilation unit (ventilation component) mounted onto an electrical component of a vehicle, a sealing member, such as an O ring, is provided between a housing of the electrical component and a member supporting a ventilation membrane for preventing water or the like from entering through a gap between the housing of the electrical component and the member supporting the ventilation membrane. However, in car washing operation by high-pressure water jetting, there is a risk of deformation of the sealing member because the sealing member directly gets wet by the high-pressure water. Then, deformation of the sealing member leads to a risk that water or the like enters the inside of the housing.\n\nAn object of the present invention is to provide a ventilation unit capable of preventing water or the like from entering the inside of a housing.",
  "cpc": [
    "H01M 50/233",
    "F16B 21/02",
    "F16B 21/08",
    "F16C 2326/01",
    "F16C 2380/00",
    "H01M 10/60",
    "H01M 10/625",
    "H01M 10/6561",
    "H01M 2220/20",
    "H01M 50/143",
    "H01M 50/30",
    "H01M 50/325",
    "H05K 5/061",
    "H05K 5/068",
    "Y02E 60/10"
  ],
  "ipc": [
    "H01M 50/233",
    "H01M 50/325"
  ],
  "assignees": [
    "Nitto Denko Corp"
  ],
  "inventors": [
    "Yusuke Nakayama",
    "Youzou Yano",
    "Kou Uemura"
  ],
  "filing_date": "2019-06-11",
  "publication_date": "2023-11-07",
  "grant_date": "2023-11-07",
  "priority_date": "2018-06-20",
  "application_number": "US-201917253715-A",
  "family_id": "68982674",
  "cited_by_count": 1,
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  ]
}