X-ray generating apparatus and X-ray imaging apparatus

An X-ray generating apparatus comprising:

• an X-ray generating unit having a first bottom surface formed of an anode including a radiation portion configured to emit X-rays, a second bottom surface on an opposite side to the first bottom surface, and a side surface;
• a driving circuit configured to drive the X-ray generating unit;
• an accommodation housing configured to accommodate the X-ray generating unit and the driving circuit;
• and
• an insulating component arranged in the accommodation housing,
• wherein the accommodation housing has a first accommodation portion and a second accommodation portion,
• the second accommodation portion is arranged so as to define a space protruding from a space defined by the first accommodation portion,
• at least a part of the X-ray generating unit is accommodated in the second accommodation portion,
• the driving circuit is accommodated in the first accommodation portion,
• the insulating component includes a first insulating member arranged between the driving circuit and the first accommodation portion and a second insulating member arranged between the X-ray generating unit and the second accommodation portion,
• at least part of a first space is defined by an external surface of the first insulating member and an internal surface of the first accommodation portion,
• at least part of a second space is defined by an external surface of the second insulating member and an internal surface of the second accommodation portion,
• at least part of a third space is defined by the side surface of the X-ray generating unit and an internal surface of the second insulating member,
• at least part of a fourth space is defined by the second bottom surface of the X-ray generating unit and an internal surface of the first insulating member,
• the second space communicates with the third space through a first communicating portion without intervention of the first space and the fourth space,
• the first space communicates with the fourth space through a second communicating portion without intervention of the second space and the third space,
• the second insulating member includes a first end portion coupled to the first insulating member and a second end portion on an opposite side to the first end portion,
• the second accommodation portion includes a top plate portion facing the second end portion of the second insulating member, the anode forming part of the top plate portion,
• the first communicating portion is arranged between an internal surface of the top plate portion and the second end portion,
• the first insulating member includes a bottom surface portion parallel to the first bottom surface, the second communicating portion being arranged in the bottom surface portion,
• the third space, the second communicating portion and the driving circuit are arranged such that a virtual straight line extending through the driving circuit exists so as to connect the third space and the second communicating portion,
• the first space, the second space, the third space, and the fourth space are filled with an insulating liquid, and
• the insulating liquid circulates between an outside space of the insulating component, which includes the first space and the second space, and an inside space of the insulating component, which includes the third space and the fourth space, through the first communicating portion and the second communicating portion.