Electric heating catalyst

An electric heating catalyst comprising:

• a heat generating element which generates heat by applying electricity and which heats a catalyst by generating the heat;
• a case which accommodates the heat generating element;
• an insulating member which is provided between the heat generating element and the case, which supports the heat generating element, and which provides insulation from electricity;
• an electrode which is connected to the heat generating element while passing through an electrode chamber and which supplies electricity to the heat generating element, the electrode chamber being a space positioned between an inner wall surface of the case and an outer circumferential surface of the heat generating element and the electrode chamber having a side wall surface formed by the insulating member;
• and
• an occluding member which is formed of such a highly airtight insulating material that the highly airtight insulating material has an airtightness higher than those of the heat generating element and the insulating member, and the highly airtight insulating material provides insulation from electricity and with which the electrode chamber is filled.

An electric heating catalyst comprising:

• a heat generating element which generates heat by applying electricity and which heats a catalyst by generating the heat;
• a case which accommodates the heat generating element;
• an insulating member which is provided between the heat generating element and the case, which supports the heat generating element, and which provides insulation from electricity;
• an electrode which is connected to the heat generating element while passing through an electrode chamber and which supplies electricity to the heat generating element, the electrode chamber being a space positioned between an inner wall surface of the case and an outer circumferential surface of the heat generating element and the electrode chamber having a side wall surface formed by the insulating member;
• and
• an occluding member which is formed of such a highly airtight insulating material that the highly airtight insulating material has an airtightness higher than those of the heat generating element and the insulating member, and the highly airtight insulating material provides insulation from electricity and which covers the outer circumferential surface of the heat generating element and end surfaces of the insulating member disposed on an upstream side and a downstream side.