Ventilation unit
AssigneeNitto Denko Corporation
InventorsYusuke NAKAYAMA, Youzou YANO
Life of this patent
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Abstract
The ventilation unit includes: an explosion-proof valve that permits gas to flow from the inside of a housing to the outside of the housing when internal pressure within the housing is higher than external pressure outside the housing by a value larger than or equal to a predetermined value, and is capable of returning to block the flow of the gas from the inside of the housing to the outside of the housing; and a ventilation membrane that permits gas to flow between the inside and the outside of the housing even when a pressure difference between the internal pressure and the external pressure is less than the predetermined value.
Claims21
-12. (canceled)
A ventilation unit comprising:
- a first ventilation body that permits gas to flow from an inside of a housing to an outside of the housing when internal pressure, which is pressure inside the housing, is higher than external pressure, which is pressure outside the housing, by a value not less than a predetermined value, and is capable of returning to block flow of the gas from the inside of the housing to the outside of the housing;
- and
- a second ventilation body that permits gas to flow between the inside of the housing and the outside of the housing even when a pressure difference between the internal pressure and the external pressure is less than the predetermined value, wherein
- the first ventilation body includes;
- an annular portion in which a through hole is formed, the annular portion having an annular shape;
- and
- an inclined portion that is provided outside in a radial direction of the annular portion and extends over a whole circumference in a direction inclined with respect to a hole direction of the through hole.
A ventilation unit comprising:
- a first ventilation body that closes a first flow path when a pressure difference between internal pressure, which is pressure inside a housing, and external pressure, which is pressure outside the housing, is a value less than a predetermined value, and is elastically deformed to open the first flow path when the internal pressure is higher than the external pressure by a value not less than the predetermined value;
- and
- a second ventilation body that is provided to a second flow path and permits gas to flow between the inside of the housing and the outside of the housing via the second flow path even when the pressure difference between the internal pressure and the external pressure is less than the predetermined value, wherein
- the first ventilation body includes;
- an annular portion in which a through hole is formed, the annular portion having an annular shape;
- and
- an inclined portion that is provided outside in a radial direction of the annular portion and extends over a whole circumference in a direction inclined with respect to a hole direction of the through hole.
Dependencies are inferred from the claim text.