公开(公告)号：US20020146092A1

公开(公告)日：2002-10-10

申请号：US09829353

申请日：2001-04-09

Applicant: Varian Medical Systems, Inc.

Inventor： John E. Richardson ,  Gregory C. Andrews ,  Robert S. Miller ,  Allen C. Campbell

IPC: H01J035/10

CPC classification number: H01J35/106 ,  H01J2235/1204 ,  H01J2235/1275 ,  H01J2235/1283 ,  H01J2235/1287 ,  H05G1/025 ,  H05G1/04

Abstract: A cooling system for use with high-power x-ray tubes. The cooling system includes a dielectric coolant disposed in the x-ray tube housing so as to absorb heat dissipated by the stator and other electrical components, as well as absorbing some heat from the x-ray tube itself. To improve heat absorption from the stator and the x-ray tube, the dielectric coolant is circulated throughout the housing by a circulating pump. The cooling system also includes a coolant circuit employing a pressurized water/glycol solution as a coolant. Pressurization of the water/glycol solution is achieved by way of an accumulator which, by pressurizing the coolant to a desired level, raises its boiling point and capacity to absorb heat. A coolant pump circulates the pressurized coolant through a fluid passageway defined in an aperture of the x-ray tube and through a target cooling block disposed proximate to the x-ray tube in the x-ray tube housing, so as to position the coolant to absorb some of the heat generated at the aperture by secondary electrons, and the heat generated in the target cooling block by the target anode of the x-ray tube. The target cooling block is in contact with the dielectric fluid so that some of the heat absorbed by the dielectric coolant is transferred to the coolant flowing through the target cooling block. The heated coolant is then passed through an air/water radiator where a flow of air serves to remove some heat from the coolant. Thus cooled, the coolant then exits the radiator to repeat the cycle.

Abstract translation: 用于大功率x射线管的冷却系统。 冷却系统包括设置在x射线管壳体中的介电冷却剂，以便吸收由定子和其它电气部件散发的热量，以及从X射线管本身吸收一些热量。 为了改善来自定子和x射线管的热吸收，电介质冷却剂通过循环泵在整个壳体内循环。 冷却系统还包括使用加压水/乙二醇溶液作为冷却剂的冷却剂回路。 水/乙二醇溶液的加压通过储液器实现，储液器通过将冷却剂加压至所需水平，提高其沸点和吸收热量的能力。 冷却剂泵将加压的冷却剂循环通过限定在x射线管的孔中的流体通道并且通过靠近x射线管外壳中的x射线管设置的目标冷却块，以将冷却剂定位到 通过二次电子吸收在孔径处产生的一些热量，以及由X射线管的目标阳极在目标冷却块中产生的热量。 目标冷却块与电介质流体接触，使得由电介质冷却剂吸收的一些热量被传递到流过目标冷却块的冷却剂。 然后，加热的冷却剂通过空气/水散热器，其中空气流用于从冷却剂中去除一些热量。 如此冷却，冷却剂然后离开散热器重复循环。