WO2013021919A1 - Dispositif à liquide de refroidissement, dispositif de tomographie par calculateur aux rayons x et son procédé d'entretien - Google Patents

Dispositif à liquide de refroidissement, dispositif de tomographie par calculateur aux rayons x et son procédé d'entretien Download PDF

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Publication number
WO2013021919A1
WO2013021919A1 PCT/JP2012/069744 JP2012069744W WO2013021919A1 WO 2013021919 A1 WO2013021919 A1 WO 2013021919A1 JP 2012069744 W JP2012069744 W JP 2012069744W WO 2013021919 A1 WO2013021919 A1 WO 2013021919A1
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WIPO (PCT)
Prior art keywords
ray
radiator
housing
base
unit
Prior art date
Application number
PCT/JP2012/069744
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English (en)
Japanese (ja)
Inventor
阿武　秀郎
智成 石原
哲也 米澤
春信 福島
千治 田所
仁志 服部
Original Assignee
東芝電子管デバイス株式会社
株式会社 東芝
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2012147432A external-priority patent/JP5902054B2/ja
Priority claimed from JP2012169319A external-priority patent/JP2013084572A/ja
Application filed by 東芝電子管デバイス株式会社, 株式会社 東芝 filed Critical 東芝電子管デバイス株式会社
Priority to CN201280037927.1A priority Critical patent/CN103732145B/zh
Publication of WO2013021919A1 publication Critical patent/WO2013021919A1/fr
Priority to US14/173,556 priority patent/US9351694B2/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/44—Constructional features of apparatus for radiation diagnosis
    • A61B6/4488—Means for cooling
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
    • A61B6/03—Computed tomography [CT]
    • A61B6/032—Transmission computed tomography [CT]
    • A61B6/035—Mechanical aspects of CT
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
    • G01N23/046—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT]

Definitions

  • Embodiments described herein relate generally to a cooling machine, an X-ray computed tomography apparatus, and a maintenance method for the X-ray computed tomography apparatus.
  • a gantry of an X-ray computed tomography apparatus (hereinafter referred to as an X-ray CT apparatus) includes a fixed frame, a rotating pedestal rotatably supported by the fixed frame, and a housing containing the fixed frame and the rotating pedestal. I have.
  • the gantry also includes an X-ray tube device, an X-ray detector, a cooling unit (cooling machine), and the like mounted on a rotating mount.
  • the rotating mount has a ring-shaped frame portion, and an X-ray tube device, an X-ray detector, a cooling unit, and the like are attached to the inner wall of the ring-shaped frame 10. These units are relatively compact but have a large mass and a high pressure on the installation surface, so that particularly strong fixation is required.
  • the frame such as the X-ray tube apparatus and the cooling unit can be used even when the rotating base rotates at a high speed and as a result, a great centrifugal force is applied to the X-ray tube apparatus and the cooling unit. It is possible to maintain strong adhesion to the part.
  • the X-ray tube device and the cooling unit are connected via a circulation path through which a coolant that transmits heat generated by the X-ray tube is circulated.
  • the heat source of the X-ray CT apparatus is an X-ray tube. For this reason, the heat generated by the X-ray tube is transmitted to the cooling liquid, and the high-temperature cooling liquid is sent to the cooling unit.
  • the cooling unit includes a radiator and a fan unit. The coolant cooled by the cooling unit is returned to the X-ray tube again.
  • the heat generated in the X-ray tube eventually heats the air blown by the fan unit. Then, the heated air is trapped inside the casing, increasing the temperature of the internal atmosphere of the casing, and impairing the cooling performance of the cooling unit and the stability of the sensitivity of the X-ray detector.
  • an opening is formed in the frame portion of the rotating gantry, and the air that has passed through the radiator is discharged to the outside of the frame portion through the opening.
  • an exhaust port is formed in the upper portion and an intake port is formed in the lower portion.
  • the air that has passed through the opening of the frame portion can be discharged from the exhaust port of the housing to the outside of the housing, and new air can be taken into the housing from the intake port of the housing. Since the air inside the housing can be replaced, an increase in the temperature of the internal atmosphere of the housing can be suppressed.
  • the above X-ray CT apparatus has the following problems.
  • the air blown to the radiator by the fan unit is the outside air introduced from the intake port of the housing, but generally the outside air contains dust.
  • dust accumulates in the gaps between the fins of the radiator as the usage time elapses, and the air gradually becomes difficult to pass through the radiator.
  • the cooling performance of the cooling unit decreases and the cooling rate of the X-ray tube also decreases. For this reason, overheating occurs in the X-ray tube, and there is a risk that electric discharge frequently occurs in the X-ray tube or the product life of the X-ray tube is shortened.
  • the radiator is attached in close contact with the frame part. For this reason, in the state of a finished product (product), it is difficult to clean the dust accumulated in the gaps between the fins of the radiator. In order to clean the dust accumulated in the gaps between the fins of the radiator, the X-ray tube device connected to the cooling unit must be removed from the frame in addition to the cooling unit, which requires a lot of maintenance work. Become.
  • the present invention has been made in view of the above points, and an object of the present invention is to provide a cooling machine, an X-ray computed tomography apparatus, and a maintenance method for the X-ray computed tomography apparatus that can be cleaned without removing the radiator from the rotating mount. It is to provide.
  • FIG. 1 is a perspective view showing an appearance of a gantry of the X-ray CT apparatus according to the first embodiment.
  • FIG. 2 is a cross-sectional view showing the X-ray CT apparatus taken along line II-II in FIG.
  • FIG. 3 is a front view showing the rotating gantry shown in FIG. 2 and the X-ray tube device, cooling unit, and X-ray detector mounted on the rotating gantry.
  • FIG. 4 is a conceptual configuration diagram showing the X-ray tube device and the cooling unit.
  • FIG. 5 is a schematic configuration diagram showing a separated state of the X-ray tube apparatus shown in FIG.
  • FIG. 6 is a schematic configuration diagram illustrating a separated state of the cooling unit illustrated in FIG. 4.
  • FIG. 5 is a schematic configuration diagram showing a separated state of the X-ray tube apparatus shown in FIG.
  • FIG. 7 is a cross-sectional view showing the X-ray tube apparatus of Example 1 of the X-ray CT apparatus according to the first embodiment.
  • FIG. 8 is a cross-sectional view showing an X-ray tube apparatus of Example 2 of the X-ray CT apparatus according to the first embodiment.
  • FIG. 9 is another sectional view showing the X-ray tube apparatus shown in FIG.
  • FIG. 10 is an enlarged cross-sectional view of a part of the X-ray tube apparatus shown in FIGS.
  • FIG. 11 is a front view showing the rotating gantry of the X-ray CT apparatus according to the second embodiment, and the X-ray tube device, the cooling unit, and the X-ray detector mounted on the rotating gantry.
  • FIG. 12 is a front view showing the rotating gantry of the X-ray CT apparatus according to the third embodiment, and the X-ray tube device, the cooling unit, and the X-ray detector mounted on the rotating gantry.
  • FIG. 13 is a front view showing a rotating gantry of an X-ray CT apparatus according to the fourth embodiment, and an X-ray tube device, a cooling unit, and an X-ray detector mounted on the rotating gantry.
  • FIG. 14 is a front view showing a rotating gantry of an X-ray CT apparatus according to the fifth embodiment, and an X-ray tube device, a cooling unit, and an X-ray detector mounted on the rotating gantry.
  • FIG. 15 is an enlarged schematic view showing a part of the X-ray CT apparatus according to the fifth embodiment, and includes a frame part, a circulation pump, a radiator, a fan unit, a mount, a housing, an air basin, and a duct.
  • FIG. 16 is an enlarged schematic view showing a part of the X-ray CT apparatus according to the sixth embodiment, showing a frame part, a circulation pump, a radiator, a fan unit, a mount, a housing, an air basin, and a duct.
  • FIG. 17 is an enlarged schematic view showing a part of the X-ray CT apparatus according to the seventh embodiment, and shows a frame part, a circulation pump, a radiator, a fan unit, a mount, a housing, and an air basin. is there.
  • FIG. 18 is a cross-sectional view showing a part of the X-ray CT apparatus taken along line XVIII-XVIII in FIG.
  • FIG. 19 is an enlarged schematic view showing a part of the X-ray CT apparatus according to the eighth embodiment, and is a view showing a frame part, a circulation pump, a radiator, a fan unit, a mount, a housing, and an air basin. is there.
  • FIG. 18 is a cross-sectional view showing a part of the X-ray CT apparatus taken along line XVIII-XVIII in FIG.
  • FIG. 19 is an enlarged schematic view showing a part of the X-ray CT apparatus according to the eighth embodiment, and is a view showing a frame part, a
  • FIG. 20 is a cross-sectional view showing a part of the X-ray CT apparatus taken along line XX-XX in FIG.
  • FIG. 21 is an enlarged schematic view showing a part of the X-ray CT apparatus according to the ninth embodiment, showing a frame part, a circulation pump, a radiator, a fan unit, a mount, a housing, an air basin, and a duct.
  • FIG. 22 is a cross-sectional view showing a part of the X-ray CT apparatus taken along line XXII-XXII in FIG.
  • FIG. 23 is a diagram showing a modification of the X-ray CT apparatus, and is a conceptual configuration diagram showing an X-ray tube apparatus and a cooling unit.
  • FIG. 24 is a schematic configuration diagram showing a separated state of the X-ray tube apparatus shown in FIG.
  • FIG. 25 is a schematic configuration diagram showing a separated state of the cooling unit shown in FIG.
  • FIG. 26 is a diagram showing another modification of the X-ray CT apparatus, and is a schematic configuration diagram showing an air basin, a pressure detector, a pressure control device, and a pressure adjustment mechanism.
  • FIG. 27 is a diagram showing another modification of the X-ray CT apparatus, and is a schematic configuration diagram showing an air basin.
  • FIG. 28 is a front view showing a rotating gantry of a comparative example of the X-ray CT apparatus, and an X-ray tube device, a cooling unit, and an X-ray detector mounted on the rotating gantry.
  • FIG. 29 is a perspective view schematically showing the X-ray CT apparatus according to the embodiment.
  • FIG. 30 is a cross-sectional view schematically showing the structure inside the rotating body in the X-ray CT apparatus shown in FIG.
  • FIG. 31 is a cross-sectional view schematically showing the structure of the cooler according to the tenth embodiment shown in FIG.
  • FIG. 32 is a cross-sectional view schematically showing features of the cooler according to the tenth embodiment shown in FIG.
  • FIG. 33 is a cross-sectional view schematically showing features of the cooler according to the tenth embodiment shown in FIG.
  • FIG. 34 is a cross-sectional view schematically showing features of the cooler according to the tenth embodiment shown in FIG.
  • the cooler is a cooler for cooling an X-ray generator that is mounted on a rotating body and is rotated around a rotation center axis together with the rotating body.
  • the cooler is mounted so as to close a casing having a base fixed to a cooler fixing surface of the rotating body and a vent provided in a portion other than the base of the casing, and the coolant circulates.
  • a radiator unit that is attached to the circulation path and discharges heat of the cooling liquid to the outside; and a fan unit that is housed in the housing and creates a flow of air passing through the radiator unit.
  • the air flow is a flow away from the rotation center axis, and the windward side of the radiator unit is exposed to the outside of the casing.
  • An X-ray computed tomography apparatus houses a housing, a cathode that emits an electron beam, an anode target that emits X-rays when irradiated with the electron beam, and the cathode and the anode target.
  • An X-ray tube device including an X-ray tube housed in the housing, a coolant to which at least part of heat generated by the X-ray tube is transmitted, and the cooling A circulation path through which the liquid circulates, a circulation pump attached to the circulation path to circulate the cooling liquid, a radiator unit attached to the circulation path to release heat of the cooling liquid to the outside, and the radiator unit.
  • a fan unit that creates a flow of passing air; an X-ray detector that detects the X-ray; and a ring-shaped frame portion that rotates about a rotation axis; Comprising a tube unit, a circulation pump, a radiator unit, a rotating gantry of the fan unit and the X-ray detector is mounted, the.
  • the windward side of the radiator unit is exposed to the space on the inner wall side of the frame portion.
  • a maintenance method for an X-ray computed tomography apparatus includes a housing, a cathode that emits an electron beam, an anode target that emits X-rays when irradiated with the electron beam, and the cathode and anode.
  • An X-ray tube device including a vacuum envelope containing a target and housed in the housing; and a coolant to which at least part of heat generated by the X-ray tube is transmitted;
  • An X-ray computed tomography apparatus is prepared in which the windward side of the radiator unit is exposed in the space on the inner wall side of the frame portion.
  • the housing, radiator unit, circulation pump, and bellows mechanism connected to form the circulation path are separated into two systems by two detachable joints. After separation into the two systems, another bellows mechanism is attached to the other system not including the bellows mechanism via the removable joint.
  • the X-ray computed tomography apparatus is an X-ray CT (computerized tomography) apparatus.
  • FIG. 1 is a perspective view showing an appearance of a gantry of the X-ray CT apparatus according to the first embodiment.
  • FIG. 2 is a cross-sectional view showing the X-ray CT apparatus taken along line II-II in FIG.
  • FIG. 3 is a front view showing the rotating gantry shown in FIG. 2 and the X-ray tube device, cooling unit, and X-ray detector mounted on the rotating gantry.
  • the X-ray CT apparatus 1 includes a housing 2, a base part 4, a fixed base 5, a rotary base 6, a bearing member 8, an X-ray tube device 10, a cooling unit 20, and an X-ray.
  • a detector 40 is provided.
  • casing 2 accommodates many said members.
  • the housing 2 decorates the external appearance of the X-ray CT apparatus 1.
  • the housing 2 includes an exhaust port 2a, an intake port 2b, and an introduction port 2c.
  • the exhaust port 2 a is formed in the upper part of the housing 2.
  • the exhaust port 2a is closed with a mesh-like cover 3 having excellent air permeability.
  • the X-ray CT apparatus 1 further includes a fan unit provided in the housing 2 and facing the cover 3. Thereby, the air in the housing
  • the air inlet 2 b is formed in the lower part of the housing 2.
  • the air inlet 2 b is formed in a gap between the housing 2 and the base portion 4. New air outside the housing 2 can be taken into the housing 2 through the air inlet 2b. From the above, since the air inside the housing 2 can be replaced, an increase in the temperature of the air inside the housing 2 can be suppressed.
  • the inlet 2c is for introducing a subject.
  • the X-ray CT apparatus 1 also includes a bed on which a subject is placed.
  • the fixed mount 5 is fixed to the base part 4.
  • a bearing (rolling bearing, ball / roll bearing) member 8 that functions as a bearing mechanism is provided between the fixed base 5 and the rotary base 6.
  • the rotating gantry 6 is rotatably supported by the fixed gantry 5 via a bearing member 8.
  • the rotating gantry 6 is called a gantry, and can rotate around a rotating shaft (gantry center) a1 of the rotating gantry 6.
  • the X-ray CT apparatus employs, for example, a direct drive motor.
  • the rotary mount 6 has a ring-shaped frame portion 7 located on the outermost periphery.
  • An opening 7 a is formed in the frame portion 7.
  • the size and the number of the openings 7a correspond to the size and the number of fan units 25 described later.
  • the X-ray tube device 10, the cooling unit 20, and the X-ray detector 40 are attached to the rotating mount 6.
  • the X-ray tube device 10 and the cooling unit 20 are attached to the inner wall of the frame portion 7.
  • a high voltage generating power source or the like may be attached to the inner wall of the frame portion 7.
  • the X-ray tube apparatus 10 and the cooling unit 20 are relatively compact and have a large mass and a high pressure on the installation surface, and are thus firmly fixed to the frame portion 7. As a result, even when the rotating gantry 6 rotates at a high speed and, as a result, a great centrifugal force is applied to the X-ray tube apparatus 10 and the cooling unit 20, these can maintain a firm adhesion to the frame portion 7. .
  • the X-ray tube device 10 functions as an X-ray generator and emits X-rays.
  • the X-ray detector 40 faces the X-ray tube device 10 (X-ray tube) with the rotation axis a1 interposed therebetween.
  • the X-ray detector 40 has a plurality of X-ray detection elements arranged in an arc shape, for example.
  • the X-ray CT apparatus may be provided with a plurality of X-ray detectors 40 and arranged.
  • the X-ray detector 40 detects X-rays emitted from the X-ray tube apparatus 10 and transmitted through the subject, and converts the detected X-rays into electrical signals.
  • the X-ray CT apparatus 1 may further include a data collection device that is attached to the rotary base 6 and that amplifies an electric signal output from the X-ray detector 40 and performs AD conversion.
  • the fixed base 5 may be provided with a device for supplying electric power or a control signal to the X-ray tube apparatus 10 and the cooling unit 20. The said apparatus can be given to the X-ray tube apparatus 10 and the cooling unit 20 etc. which are attached to the rotation mount 6 via the slip ring.
  • the rotary mount 6 rotates around the rotation axis a1.
  • the X-ray tube apparatus 10 the cooling unit 20, the X-ray detector 40, and the like rotate integrally around the subject.
  • X-rays are emitted from the X-ray tube device 10.
  • the X-ray passes through the subject and enters the X-ray detector 40, and the X-ray detector 40 detects the intensity of the X-ray.
  • the detection signal detected by the X-ray detector 40 is amplified by, for example, the data acquisition device, converted into a digital detection signal by A / D conversion, and supplied to a computer (not shown).
  • the computer calculates the X-ray absorption rate in the region of interest of the subject based on the digital detection signal, and constructs image data for generating a tomographic image of the subject from the calculation result.
  • the image data is sent to a display device (not shown) and displayed as a tomographic image on the screen.
  • the X-ray tube apparatus 10 and the X-ray detector 40 rotate with the subject interposed therebetween, and so-called projections of X-ray intensity transmitted through all points in the examination section of the subject.
  • Data is acquired from various angles, for example from a range of 360 °. Based on this projection data, a tomographic image is generated by a data reconstruction program programmed in advance.
  • FIG. 4 is a conceptual configuration diagram showing the X-ray tube apparatus 10 and the cooling unit 20.
  • the X-ray tube device 10 includes a housing 12 and an X-ray tube 13 accommodated in the housing 12.
  • the housing 12 (X-ray tube device 10) is independently and directly attached and fixed to the rotating gantry 6 independently.
  • the housing 12 is directly attached to the inner wall of the frame portion 7.
  • the X-ray tube 13 includes a cathode that emits an electron beam, an anode target that emits X-rays when irradiated with the electron beam, and a vacuum envelope that houses the cathode and the anode target.
  • the X-ray CT apparatus 1 has a coolant 9. At least a part of the heat generated by the X-ray tube 13 is transmitted to the coolant 9.
  • the X-ray tube apparatus 10 has a conduit 11a and a conduit 11b.
  • One end of the conduit 11 a is airtightly attached to the coolant inlet 12 i of the housing 12, and the other end is airtightly attached to the socket 72.
  • One end of the conduit 11 b is airtightly attached to the coolant discharge port 12 o of the housing 12, and the other end is airtightly attached to the socket 82.
  • the conduit 11a and the conduit 11b form a part of the circulation path 30 through which the coolant 9 circulates.
  • the coolant 9 is accommodated in the housing 12.
  • the housing 12 forms a part of the circulation path 30 together with the conduit 11a and the conduit 11b. And since the cooling fluid 9 circulates through the heat transfer surface of the X-ray tube 13, it is possible to cool the X-ray tube 13, particularly an anode target described later.
  • the conduit 11a and the X-ray tube 13 are connected directly or indirectly through a joint, or the conduit 11b and the X-ray tube 13 are connected. Connect directly or indirectly through a joint.
  • the inside of the housing 12 and the X-ray tube 13 forms a part of the circulation path 30 together with the conduit 11a and the conduit 11b.
  • the coolant 9 circulates through the heat transfer surface inside the X-ray tube 13, whereby the X-ray tube 13, particularly an anode target described later, can be cooled.
  • the coolant may be accommodated in the housing 12, or conversely. It does not have to be.
  • the coolant stored in the housing 12 may be a different type of coolant from the coolant 9.
  • the inside of the X-ray tube 13 forms a part of the circulation path 30 together with the conduit 11a and the conduit 11b. Thereby, the coolant 9 circulates through the heat transfer surface inside the X-ray tube 13, whereby the X-ray tube 13, particularly an anode target described later, can be cooled.
  • the cooling unit 20 has a conduit 21a, a conduit 21b, a conduit 21c, a conduit 21d, a circulation pump 22, a heat exchanger 23, and an air basin 60 as a bellows mechanism.
  • One end of the conduit 21a is airtightly attached to the plug 81.
  • One end of the conduit 21c is airtightly attached to the plug 71.
  • One end of the conduit 21d is airtightly attached to the conduit 21a.
  • the conduit 21a, the conduit 21b, the conduit 21c, and the conduit 21d form part of the circulation path 30.
  • the circulation pump 22 is independently attached or fixed to the inner wall of the frame portion 7 independently.
  • the circulation pump 22 is directly attached to the inner wall of the frame portion 7.
  • the circulation pump 22 is attached to the circulation path 30.
  • the circulation pump 22 is airtightly attached between the conduit 21a and the conduit 21b.
  • the circulation pump 22 discharges the coolant 9 to the conduit 21b and takes in the coolant 9 from the conduit 21a.
  • the circulation pump 22 can circulate the coolant 9 in the circulation path 30.
  • the heat exchanger 23 is attached to the circulation path 30 and releases the heat of the coolant 9 to the outside.
  • the heat exchanger 23 includes a radiator 24, a fan unit 25, and a duct 26.
  • the radiator 24 is attached to the circulation path 30.
  • the radiator 24 includes a conduit 21b and a plurality of heat radiating pipes (not shown) through which a coolant flows, and a plurality of heat radiating fins (not shown) attached to the heat radiating pipes.
  • the radiator 24 can release the heat of the coolant 9 to the outside.
  • the radiator 24 is a fin tube type structure in which a plurality of fins having a large surface area in contact with air are attached to a tube in which a coolant having a circular or flat cross section flows, and has a substantially panel shape. Yes.
  • the radiator 24 has a front surface that is the windward side of the air flow that passes through the radiator and a back surface that is the leeward side.
  • a gap between adjacent fins becomes an air flow path.
  • flat tubes arranged in a large number at equal intervals and corrugated fins are attached to the gaps, and the tops are attached to the flat side surfaces of the flat tubes, the fins and the flat tubes A gap between the flat side surfaces becomes an air flow path.
  • the fan units 25 are positioned to face the opening 7a and the back surface of the radiator 24, respectively.
  • the distance from the rotation axis a1 to the fan unit 25 is longer than the distance from the rotation axis a1 to the radiator 24.
  • the fan unit 25 can create a flow of air that passes from the front surface to the back surface of the radiator 24.
  • the fan unit 25 can release the air passing through the radiator 24 to the outside of the rotary mount 6 (frame portion 7) through the opening 7a.
  • the heat exchanger 23 can release the heat of the coolant 9 to the outside.
  • the air that has passed through the radiator 24 can be released to the outside of the rotating gantry 6, an increase in the temperature of the air inside the rotating gantry 6 can be suppressed.
  • the duct 26 is located between the radiator 24 and the fan unit 25.
  • the duct 26 surrounds the peripheral edge of the radiator 24 and the peripheral edge of the fan unit 25.
  • the duct 26 can guide the air flow around the radiator 24 to the fan unit 25. Since the air heated by passing through the radiator 24 can be efficiently guided to the fan unit 25, the temperature of the air inside the rotating mount 6 (the region surrounded by the rotating mount 6 and the housing 2) is increased. Can be further suppressed. Thereby, the cooling performance of the heat exchanger 23 and the stability of the sensitivity of the X-ray detector 40 can be maintained in a high state.
  • the cooling unit 20 further includes a housing 50 attached to the rotary mount 6.
  • the housing 50 is attached and fixed to the inner wall of the frame portion 7.
  • the housing 50 is made of sheet metal, for example.
  • the housing 50 is designed to have a mechanical strength that can withstand the centrifugal force applied with the rotation of the rotary mount 6.
  • the radiator 24, the fan unit 25, and the duct 26 are housed in a casing 50 and unitized.
  • the housing 50 is formed so as to open so as to expose the radiator 24 and the fan unit 25 to the outside.
  • the radiator 24, the fan unit 25, and the duct 26 are directly or indirectly attached and fixed to the rotary mount 6.
  • the radiator 24, the fan unit 25, and the duct 26 are indirectly attached to the inner wall of the frame portion 7 via the housing 50.
  • the air basin 60 is directly or indirectly attached to the rotary mount 6.
  • the air basin 60 is directly attached to the frame portion 7 independently of the housing 12, the circulation pump 22, the radiator 24, the fan unit 25, and the like.
  • the air basin 60 is attached to the circulation path 30.
  • the air basin 60 has a case 61 having an opening 61a.
  • the opening 61a is in airtight communication with the conduit 21d.
  • the air basin 60 has a bellows 62 as an elastic diaphragm that divides the inside of the case 61 into a first region 63 and a second region 64 connected to the opening 61a.
  • the case 61 has a vent hole 65 connected to the second region 64. Since the vent hole 65 allows air to enter and exit, the second region 64 is open to the atmosphere.
  • the bellows 62 is liquid-tightly attached to the case 61.
  • the bellows 62 is telescopic.
  • the bellows 62 is formed of rubber.
  • the bellows 62 can absorb a volume change (expansion and contraction of the volume) due to a temperature change of the coolant 9.
  • the bellows 62 is preferably formed of a material that is impermeable to gas.
  • the plug 71 and the socket 72 form a coupler 70 as a detachable joint
  • the plug 81 and the socket 82 form a coupler 80 as a detachable joint.
  • the couplers 70 and 80 can be switched between a connected state (fixed state) in which the plug and the socket are connected and a separated state in which the plug and the socket are separated.
  • the couplers 70 and 80 are connected in an airtight and liquid-tight manner in the connected state.
  • the couplers 70 and 80 are couplers with a shut-off valve.
  • the plugs 71 and 81 and the sockets 72 and 82 can prevent leakage of the liquid (cooling liquid 9) to the outside, and can prevent air from entering the inside.
  • the separated X-ray tube apparatus 10 is configured to hardly absorb the volume change of the coolant 9. Therefore, by forming the conduits 11a and 11b with rubber hoses, the conduits 11a and 11b can have a function of absorbing the volume change of the coolant 9. However, there are cases where the volume change of the coolant 9 cannot be sufficiently absorbed by only the conduits 11a and 11b. In this case, it is preferable to attach an air tray to the X-ray tube apparatus 10 in the separated state.
  • FIG. 5 is a schematic configuration diagram showing a separated state of the X-ray tube apparatus 10 shown in FIG.
  • an air basin 90 as a bellows mechanism is attached to the X-ray tube apparatus 10.
  • the air basin 90 is attached to the X-ray tube apparatus 10 via a plug 83 and a conduit 84 that are airtight and liquid tightly connected to each other.
  • the plug 83 and the socket 82 form a coupler as a detachable joint, and are connected in an airtight and liquid-tight manner in the connected state.
  • the air basin 90 has a case 91 having an opening 91a.
  • the opening 91 a is in airtight communication with the conduit 84.
  • the air basin 90 has a bellows 92 that divides the inside of the case 91 into a first region 93 and a second region 94 connected to the opening 91a.
  • the case 91 has a vent hole 95 connected to the second region 94. Since the ventilation hole 95 allows air to enter and exit, the second region 94 is open to the atmosphere. In addition, the ventilation hole 95 does not need to be formed in the case 91. In this case, the second region 94 is a sealed space.
  • the bellows 92 is attached to the case 91 in a liquid-tight manner.
  • the bellows 92 is telescopic.
  • the bellows 92 is made of rubber.
  • the bellows 92 can absorb a volume change (expansion and contraction of the volume) due to a temperature change of the coolant 9.
  • the bellows 92 is preferably formed of a material that is impermeable to gas.
  • FIG. 6 is a schematic configuration diagram showing a separated state of the cooling unit 20 shown in FIG.
  • the cooling unit 20 in the separated state includes an air tray 60. For this reason, without adding to the cooling unit 20, leakage of the liquid (cooling liquid 9) to the outside in the cooling unit 20 in the separated state can be prevented, and mixing of air into the inside can be prevented.
  • FIG. 7 is a cross-sectional view illustrating the X-ray tube apparatus 10 according to the first embodiment.
  • the X-ray tube apparatus 10 is a rotary anode type X-ray tube apparatus, and the X-ray tube 13 is a rotary anode type X-ray tube.
  • the X-ray tube device 10 includes a stator coil 102 as a coil for generating a magnetic field in addition to the X-ray tube 13.
  • the housing 12 (FIG. 4) houses the X-ray tube 13 and the stator coil 102.
  • the X-ray tube 13 includes a fixed shaft 110 as a fixed body, a tube portion 130, an anode target 150, a rotating body 160, a liquid metal 170 as a lubricant, a cathode 180, and a vacuum envelope 190. I have.
  • the X-ray tube 13 uses a dynamic pressure slide bearing.
  • the fixed shaft 110 extends along the rotation axis a2, is formed in a cylindrical shape with the rotation axis a2 as a central axis, and one end is closed.
  • the fixed shaft 110 has a bearing surface 110 ⁇ / b> S on the side surface that is removed from the one end.
  • the fixed shaft 110 is made of a material such as an Fe (iron) alloy or an Mo (molybdenum) alloy.
  • the inside of the fixed shaft 110 is filled with the coolant 9.
  • the fixed shaft 110 has a flow path through which the coolant 9 flows.
  • the fixed shaft 110 has a discharge port 110b for discharging the coolant 9 to the outside on the other end side.
  • the pipe part 130 is provided inside the fixed shaft 110 and forms a flow path together with the fixed shaft.
  • One end portion of the tube portion 130 extends to the outside of the fixed shaft 110 through an opening 110 a formed at the other end portion of the fixed shaft 110.
  • the tube part 130 is closely fixed to the opening part 110a.
  • the pipe part 130 has an intake port 130 a for taking in the coolant 9 therein and a discharge port 130 b for discharging the coolant 9 into the fixed shaft 110.
  • the intake 130 a is located outside the fixed shaft 110.
  • the discharge port 130b is located at one end of the fixed shaft 110 with a gap.
  • the intake port 130a is connected directly to the conduit 11a or indirectly through a joint, and the discharge port 110b is opened in the housing 12.
  • the intake port 130a is opened in the housing 12, and the discharge port 110b is connected to the conduit 11b directly or indirectly through a joint.
  • the coolant 9 from the outside of the X-ray tube 13 is taken in from the intake port 130a, discharged through the inside of the tube portion 130 into the fixed shaft 110, and between the fixed shaft 110 and the tube portion 130. As a result, the liquid is discharged from the discharge port 110b to the outside of the X-ray tube 13.
  • the anode target 150 has an anode 151 and a target layer 152 provided on a part of the outer surface of the anode.
  • the anode 151 is formed in a disk shape and is provided coaxially with the fixed shaft 110.
  • the anode 151 is made of a material such as an Mo alloy.
  • the anode 151 has a recess 151a in the direction along the rotation axis a2.
  • the recess 151a is formed in a disc shape.
  • One end of the fixed shaft 110 is fitted in the recess 151a.
  • the recess 151 a is formed with a gap at one end of the fixed shaft 110.
  • the target layer 152 is formed in a ring shape from a material such as a W (tungsten) alloy.
  • the surface of the target layer 152 is an electron collision surface.
  • the rotating body 160 is formed in a cylindrical shape having a diameter larger than that of the fixed shaft 110.
  • the rotating body 160 is provided coaxially with the fixed shaft 110 and the anode target 150.
  • the rotating body 160 is formed shorter than the fixed shaft 110.
  • the rotating body 160 is made of a material such as Fe or Mo. More specifically, the rotating body 160 is provided at the cylindrical portion 161, an annular portion 162 formed integrally with the cylindrical portion so as to surround a side surface of one end portion of the cylindrical portion 161, and the other end portion of the cylindrical portion 161. A seal portion 163 and a tube portion 164 are provided.
  • the cylinder portion 161 surrounds the side surface of the fixed shaft 110.
  • the cylindrical portion 161 has a bearing surface 160S facing the bearing surface 110S with a gap on the inner surface.
  • One end portion of the rotating body 160 that is, one end portion of the cylindrical portion 161 and the ring portion 162 are joined to the anode target 150.
  • the rotating body 160 is provided so as to be rotatable together with the anode target 150 around the fixed shaft 110.
  • the seal part 163 is located on the opposite side of the ring part 162 (one end part) with respect to the bearing surface 160S.
  • the seal portion 163 is joined to the other end portion of the cylindrical portion 161.
  • the seal portion 163 is formed in an annular shape, and is provided with a gap around the entire side surface of the fixed shaft 110.
  • the tube portion 164 is joined to the side surface of the tube portion 161 and is fixed to the tube portion 161.
  • the cylinder part 164 is made of, for example, Cu (copper).
  • the liquid metal 170 is filled in a gap between one end of the fixed shaft 110 and the recess 151a and a gap between the fixed shaft 110 (bearing surface 110S) and the cylindrical portion 161 (bearing surface 160S). These gaps are all connected.
  • the liquid metal 170 is a gallium / indium / tin alloy (GaInSn).
  • the clearance (clearance) between the seal portion 163 and the fixed shaft 110 is set to a value that can maintain the rotation of the rotating body 160 and suppress the leakage of the liquid metal 170. From the above, the gap is slight and is 500 ⁇ m or less. For this reason, the seal part 163 functions as a labyrinth seal ring (labyrinth seal ring).
  • the seal portion 163 has a plurality of accommodating portions each formed by recessing the inside in a circular frame shape. In the unlikely event that the liquid metal 170 leaks from the gap, the storage portion stores the leaked liquid metal 170.
  • the cathode 180 is disposed to face the target layer 252 of the anode target 150 with a space therebetween.
  • the cathode 180 has a filament 181 that emits electrons.
  • the vacuum envelope 190 contains the fixed shaft 110, the tube part 130, the anode target 150, the rotating body 160, the liquid metal 170 and the cathode 180.
  • the vacuum envelope 190 has an X-ray transmission window 190a and an opening 190b.
  • the X-ray transmission window 190a faces the target layer 152 in a direction orthogonal to the rotation axis a2.
  • the other end of the fixed shaft 110 is exposed to the outside of the vacuum envelope 190 through the opening 190b.
  • the opening 190b fixes the fixed shaft 110 closely.
  • the cathode 180 is attached to the inner wall of the vacuum envelope 190.
  • the vacuum envelope 190 is sealed. The inside of the vacuum envelope 190 is maintained in a vacuum state.
  • the stator coil 102 is provided so as to surround the outside of the vacuum envelope 190 so as to face the side surface of the rotating body 160, more specifically, the side surface of the cylindrical portion 164.
  • the shape of the stator coil 102 is annular.
  • the operation states of the X-ray tube 13 and the stator coil 102 will be described. Since the stator coil 102 generates a magnetic field applied to the rotating body 160 (particularly the cylindrical portion 164), the rotating body rotates. Thereby, the anode target 150 also rotates. Further, a negative voltage (high voltage) is applied to the cathode 180, and the anode target 150 is set to the ground potential.
  • the cathode 180 emits electrons
  • the electrons are accelerated and collide with the target layer 152. That is, the cathode 180 irradiates the target layer 152 with an electron beam.
  • the target layer 152 emits X-rays when colliding with electrons, and the emitted X-rays are emitted to the outside of the vacuum envelope 190 and thus to the outside of the housing 12 through the X-ray transmission window 190a.
  • the X-ray tube apparatus 10 of Example 1 is formed.
  • FIG. 8 is a cross-sectional view illustrating the X-ray tube apparatus according to the second embodiment.
  • FIG. 9 is another sectional view showing the X-ray tube apparatus shown in FIG.
  • FIG. 10 is an enlarged cross-sectional view of a part of the X-ray tube apparatus shown in FIGS.
  • the X-ray tube device 10 is a fixed anode type X-ray tube device
  • the X-ray tube 13 is a fixed anode type X-ray tube.
  • the X-ray tube 13 includes a vacuum envelope 231.
  • the vacuum envelope 231 includes a vacuum container 232 and an insulating member 250.
  • the insulating member 250 functions as a high voltage insulating member.
  • a cathode 236 is attached to the insulating member 250, and the insulating member 250 forms a part of the vacuum envelope 231.
  • the anode target 235 forms a part of the vacuum envelope 231.
  • the anode target 235 is formed in a bowl shape that opens small outside the vacuum envelope 231 and swells in the vicinity of the target surface 235b.
  • the anode target 235, the cathode 236, the focusing electrode 209, and the acceleration electrode 208 are accommodated in the vacuum envelope 231.
  • a voltage supply wiring is connected to the anode target 235.
  • the anode target 235 and the acceleration electrode 208 are set to the ground potential.
  • the vacuum vessel 232 at a location facing the cathode 236 and the focusing electrode 209 is formed in a cylindrical shape.
  • a negative high voltage is applied to the cathode 236.
  • the adjusted negative high voltage is supplied to the focusing electrode 209.
  • the inside of the vacuum envelope 231 is in a vacuum state.
  • the metal surface portion 234 is provided inside the vacuum vessel 232 including the vacuum side surface of the X-ray emission window 231w, and
  • the X-ray tube 13 includes a tube portion 241 and a ring portion 242.
  • the pipe part 241 is made of metal. One end of the tube part 241 is inserted into the anode target 235.
  • the ring portion 242 is provided in the anode target 235.
  • the ring portion 242 is formed integrally with the tube portion 241 so as to surround the side surface of one end portion of the tube portion 241.
  • the ring portion 242 is provided with a gap in the anode target 235.
  • the other end of the pipe part 241 forms a coolant intake and is connected to the conduit 11a.
  • the opening of the anode target 235 forms a coolant discharge port between the tube portion 241 and the opening. For this reason, the inside of the housing 12 is filled with the coolant 9.
  • the housing 12 has an X-ray emission window 12w facing the X-ray emission window 231w.
  • a deflection unit 270 is accommodated in the housing 12.
  • the deflection unit 270 is a magnetic deflection unit, and is provided outside the vacuum vessel 232 at a position surrounding the electron beam trajectory.
  • the deflecting unit 270 deflects the electron beam emitted from the cathode 236 and moves the focal position on the target surface 235b.
  • the X-ray tube apparatus according to the second embodiment is formed.
  • the X-ray CT apparatus 11 includes the X-ray tube apparatus 10, the cooling unit 20, the X-ray detector 40, and the rotation.
  • a gantry 6 is provided.
  • the cooling unit 20 includes a circulation pump 22, a radiator 24, and a fan unit 25.
  • the rotating gantry 6 has a frame portion 7 to which an X-ray tube device 10, a circulation pump 22, a radiator 24, a fan unit 25, and an X-ray detector 40 are attached.
  • the distance from the rotation axis a1 to the fan unit 25 is longer than the distance from the rotation axis a1 to the radiator 24.
  • the fan unit 25 discharges the air flowing around the radiator 24 to the outside of the rotating mount 6 through the opening 7a.
  • the radiator 24 is not attached in close contact with the frame portion 7.
  • the size of the opening 7 a need not be substantially the same as the size of the radiator 24, and can be made smaller than the size of the radiator 24. For this reason, the fall of the mechanical strength of the frame part 7 can be suppressed. Since there is no need for reinforcement such as making the frame portion 7 wide or thick, the apparatus can be reduced in size and weight.
  • the windward side of the radiator 24 is exposed in the space on the inner wall side of the frame portion 7. For this reason, the radiator 24 can be cleaned from the space on the inner wall side of the frame portion 7 only by removing a part of the housing 2, and dust accumulated on the radiator 24 can be removed. Since the radiator 24 can be cleaned without removing the cooling unit 20 from the rotating mount 6 and further removing the X-ray tube device 10 connected to the cooling unit 20, it takes a cleaning (maintenance work). Time can be shortened.
  • FIG. 11 is a front view showing the rotating gantry 6 of the X-ray CT apparatus 1 according to the second embodiment, the X-ray tube device 10 mounted on the rotating gantry 6, the cooling unit 20, and the X-ray detector 40. .
  • the cooling unit 20 does not include the casing 50.
  • the cooling unit 20 includes a mount 27 and a mount 28.
  • the mount 27 and the mount 28 are each formed in a rectangular frame shape.
  • One end of the mount 27 is attached to the inner wall of the frame portion 7.
  • the mount 27 surrounds the opening 7a.
  • One side edge of the mount 28 is attached to the inner wall of the frame portion 7.
  • the circulation pump 22 is located in the mount 28, is attached to the mount 28, and is indirectly attached and fixed to the inner wall of the frame portion 7.
  • the air basin 60 is located between the mount 28 and the rotation axis a1, is mounted on the mount 28, and is indirectly attached and fixed to the inner wall of the frame portion 7.
  • the periphery of the radiator 24 is attached to the other end of the mount 27, and is indirectly attached and fixed to the inner wall of the frame portion 7. Needless to say, the windward side of the radiator 24 is exposed in the space on the inner wall side of the frame portion 7.
  • the fan unit 25 is directly attached to the frame portion 7.
  • the fan unit 25 is directly attached and fixed to the opening 7 a of the frame portion 7.
  • the mount 27 is located between the radiator 24 and the fan unit 25, and also functions as a duct that guides the air flow around the radiator 24 to the fan unit 25.
  • the X-ray CT apparatus 1 includes the mount 27. For this reason, the X-ray CT apparatus 1 can be formed without the housing 50 of the first embodiment, which is difficult to design mechanical strength.
  • the X-ray CT apparatus 1 includes a mount 28. Since the air basin 60 can be mounted on the mount 28, the cooling unit 20 can be designed compactly.
  • the size of the opening 7 a is not necessarily the same as the size of the radiator 24, and can be made smaller than the size of the radiator 24. For this reason, the fall of the mechanical strength of the frame part 7 can be suppressed. Since there is no need for reinforcement such as making the frame portion 7 wide or thick, the apparatus can be reduced in size and weight.
  • the windward side of the radiator 24 is exposed in the space on the inner wall side of the frame portion 7. For this reason, the radiator 24 can be cleaned from the space on the inner wall side of the frame portion 7 only by removing a part of the housing 2, and dust accumulated on the radiator 24 can be removed. Since the radiator 24 can be cleaned without removing the cooling unit 20 from the rotating mount 6 and further removing the X-ray tube device 10 connected to the cooling unit 20, it takes a cleaning (maintenance work). Time can be shortened.
  • FIG. 12 is a front view showing the rotating gantry 6 of the X-ray CT apparatus 1 according to the third embodiment, the X-ray tube device 10 mounted on the rotating gantry 6, the cooling unit 20, and the X-ray detector 40. .
  • the cooling unit 20 does not include the casing 50.
  • the cooling unit 20 includes a mount 29.
  • the mount 29 is formed integrally with a rectangular frame-shaped peripheral wall portion, a plate-shaped ceiling wall portion, and a pair of plate-shaped side wall portions located between the peripheral wall portion and the ceiling wall portion.
  • the peripheral wall portion of the mount 29 is attached to the inner wall of the frame portion 7.
  • the peripheral wall of the mount 29 surrounds the opening 7a.
  • the circulation pump 22 and the air basin 60 are located between the mount 29 and the rotation axis a1, are placed on the ceiling wall portion of the mount 29, and are indirectly attached and fixed to the inner wall of the frame portion 7.
  • the radiator 24 has a peripheral portion attached to the peripheral wall portion of the mount 29 and is indirectly attached and fixed to the inner wall of the frame portion 7.
  • the pair of side wall portions of the mount 29 have a predetermined height so that the windward side of the radiator 24 is exposed.
  • the pair of side walls of the mount 29 has a predetermined height so that the radiator 24 can be cleaned from the space between the ceiling wall of the mount 29 and the radiator 24.
  • the radiator 24 since air is allowed to enter and leave in the space between the ceiling wall portion of the mount 29 and the radiator 24, the air passing through the space between the ceiling wall portion of the mount 29 and the radiator 24 passes through the radiator 24.
  • the fan unit 25 is directly attached to the frame portion 7.
  • the fan unit 25 is directly attached and fixed to the opening 7 a of the frame portion 7.
  • the peripheral wall portion of the mount 29 is located between the radiator 24 and the fan unit 25, and also functions as a duct for guiding the air flow around the radiator 24 to the fan unit 25.
  • the X-ray CT apparatus 1 includes the mount 29. For this reason, the X-ray CT apparatus 1 can be formed without the housing 50 of the first embodiment, which is difficult to design mechanical strength. Since the circulation pump 22 and the air basin 60 can be mounted on the ceiling wall part of the mount 29, the cooling unit 20 can be designed compactly.
  • the size of the opening 7 a is not necessarily the same as the size of the radiator 24, and can be made smaller than the size of the radiator 24. For this reason, the fall of the mechanical strength of the frame part 7 can be suppressed. Since there is no need for reinforcement such as making the frame portion 7 wide or thick, the apparatus can be reduced in size and weight.
  • the windward side of the radiator 24 is exposed in the space on the inner wall side of the frame portion 7.
  • the radiator 24 can be accessed from the space between the ceiling wall of the mount 29 and the radiator 24. For this reason, the radiator 24 can be cleaned from the space on the inner wall side of the frame portion 7 only by removing a part of the housing 2, and dust accumulated on the radiator 24 can be removed. Since the radiator 24 can be cleaned without removing the cooling unit 20 from the rotating mount 6 and further removing the X-ray tube device 10 connected to the cooling unit 20, it takes a cleaning (maintenance work). Time can be shortened.
  • FIG. 13 is a front view showing the rotating gantry 6 of the X-ray CT apparatus 1 according to the fourth embodiment, the X-ray tube device 10 mounted on the rotating gantry 6, the cooling unit 20, and the X-ray detector 40. .
  • the cooling unit 20 does not include the casing 50.
  • the cooling unit 20 includes a mount 28 and a mount 29.
  • the mount 28 is formed in a rectangular frame shape. One side edge of the mount 28 is attached to the inner wall of the frame portion 7.
  • the circulation pump 22 is located in the mount 28, is attached to the mount 28, and is indirectly attached and fixed to the inner wall of the frame portion 7.
  • the air basin 60 is located between the mount 28 and the rotation axis a1, is mounted on the mount 28, and is indirectly attached and fixed to the inner wall of the frame portion 7.
  • the mount 29 is integrally formed with a rectangular frame-shaped peripheral wall portion, a plate-shaped ceiling wall portion, and a pair of plate-shaped side wall portions located between the peripheral wall portion and the ceiling wall portion.
  • the peripheral wall portion of the mount 29 is attached to the inner wall of the frame portion 7.
  • the peripheral wall of the mount 29 surrounds the opening 7a.
  • the X-ray tube device 10 (housing 12) is located between the mount 29 and the rotation axis a1, is placed on the ceiling wall portion of the mount 29, and is indirectly attached and fixed to the inner wall of the frame portion 7. .
  • the radiator 24 has a peripheral portion attached to the peripheral wall portion of the mount 29 and is indirectly attached and fixed to the inner wall of the frame portion 7.
  • the pair of side wall portions of the mount 29 have a predetermined height so that the windward side of the radiator 24 is exposed.
  • the pair of side walls of the mount 29 has a predetermined height so that the radiator 24 can be cleaned from the space between the ceiling wall of the mount 29 and the radiator 24.
  • the radiator 24 since air is allowed to enter and leave in the space between the ceiling wall portion of the mount 29 and the radiator 24, the air passing through the space between the ceiling wall portion of the mount 29 and the radiator 24 passes through the radiator 24.
  • the fan unit 25 is directly attached to the frame portion 7.
  • the fan unit 25 is directly attached and fixed to the opening 7 a of the frame portion 7.
  • the peripheral wall portion of the mount 29 is located between the radiator 24 and the fan unit 25, and also functions as a duct for guiding the air flow around the radiator 24 to the fan unit 25.
  • the X-ray CT apparatus 1 includes the mount 29.
  • the X-ray CT apparatus 1 can be formed without the housing 50 of the first embodiment, which is difficult to design mechanical strength. Since the air basin 60 can be placed on the mount 28 and the X-ray tube device 10 (housing 12) can be placed on the ceiling wall of the mount 29, the cooling unit 20 can be designed to be compact. Can do.
  • the size of the opening 7 a is not necessarily the same as the size of the radiator 24, and can be made smaller than the size of the radiator 24. For this reason, the fall of the mechanical strength of the frame part 7 can be suppressed. Since there is no need for reinforcement such as making the frame portion 7 wide or thick, the apparatus can be reduced in size and weight.
  • the windward side of the radiator 24 is exposed in the space on the inner wall side of the frame portion 7.
  • the radiator 24 can be accessed from the space between the ceiling wall of the mount 29 and the radiator 24. For this reason, the radiator 24 can be cleaned from the space on the inner wall side of the frame portion 7 only by removing a part of the housing 2, and dust accumulated on the radiator 24 can be removed. Since the radiator 24 can be cleaned without removing the cooling unit 20 from the rotating mount 6 and further removing the X-ray tube device 10 connected to the cooling unit 20, it takes a cleaning (maintenance work). Time can be shortened.
  • FIG. 14 is a front view showing the rotating gantry 6 of the X-ray CT apparatus 1 according to the fifth embodiment, the X-ray tube device 10 mounted on the rotating gantry 6, the cooling unit 20, and the X-ray detector 40.
  • FIG. 15 is an enlarged schematic view showing a part of the X-ray CT apparatus 1 according to the fifth embodiment.
  • FIG. 7 The frame unit 7, the circulation pump 22, the radiator 24, the fan units 25a and 25b, the mount 28, It is a figure which shows the housing
  • FIG. 7 The frame unit 7, the circulation pump 22, the radiator 24, the fan units 25a and 25b, the mount 28, It is a figure which shows the housing
  • the housing 50 has a bottom wall portion 51 and a lid portion 52, and is attached to a rotating mount.
  • the bottom wall portion 51 faces the inner wall of the frame portion 7.
  • the lid 52 includes a first ventilation port Oa and second ventilation ports Ob1 and Ob2.
  • the lid part 52 has a ceiling wall part 53 and a peripheral wall part 54.
  • the ceiling wall portion 53 includes the first ventilation port Oa and faces the bottom wall portion 51 with an interval.
  • the peripheral wall portion 54 includes the second ventilation ports Ob1 and Ob2, and is formed in a frame shape.
  • the peripheral wall portion 54 is closed at one end by the ceiling wall portion 53 and closed at the other end by the bottom wall portion 51.
  • the second vent Ob1 and the second vent Ob2 face each other in the rotational direction d of the rotary mount 6.
  • the bottom wall portion 51 and the ceiling wall portion 53 are formed in a rectangular plate shape, and the peripheral wall portion 54 is formed in a rectangular frame shape.
  • the housing 50 is formed airtight except for the first ventilation port Oa and the second ventilation ports Ob1 and Ob2.
  • the mount 28, the circulation pump 22 and the air basin 60 are housed in a housing 50.
  • the mount 28 is formed in a rectangular frame shape. One side edge of the mount 28 is attached to the bottom wall 51.
  • the circulation pump 22 is located in the mount 28 and is attached to the mount 28.
  • the rotation axis of the motor of the circulation pump 22 is parallel to the rotation axis a ⁇ b> 1 of the rotary mount 6.
  • the air basin 60 is located between the mount 28 and the rotation axis a1, is mounted on the mount 28, and is indirectly attached to the housing 50.
  • the radiator 24, the fan units 25a and 25b, and the housing 50 are unitized.
  • the radiator 24 is attached to the housing 50 (ceiling wall portion 53).
  • the windward side of the radiator 24 is exposed to the outside of the housing 50 through the first ventilation port Oa.
  • the fan units 25a and 25b are attached to the casing 50 (the peripheral wall portion 54).
  • the fan unit 25a is positioned to face the second ventilation port Ob1.
  • the fan unit 25b is located opposite to the second ventilation port Ob2.
  • the fan units 25 a and 25 b can create a flow of air that passes through the radiator 24.
  • the fan unit 25a takes air into the housing 50 through the first vent Oa and the radiator 24, and releases the air in the housing 50 to the outside of the housing 50 through the second vent Ob1.
  • the fan unit 25b takes the air that has passed through the first ventilation port Oa and flows around the radiator 24 into the housing 50, and releases the air in the housing 50 to the outside of the housing 50 through the second ventilation port Ob2.
  • the frame portion 7 has openings 7 a and 7 b that are out of a position facing the bottom wall portion 51 of the housing 50.
  • One end of the duct 401 surrounds the second ventilation port Ob1, is attached to the peripheral wall portion 54, and communicates with the second ventilation port Ob1.
  • the other end of the duct 401 surrounds the opening 7a, is attached to the frame portion 7, and communicates with the opening 7a.
  • the duct 401 guides the air discharged to the outside of the housing 50 through the second ventilation port Ob1 to the opening 7a and discharges it to the outside of the rotary mount 6 (frame portion 7).
  • One end of the duct 402 surrounds the second ventilation port Ob2, is attached to the peripheral wall portion 54, and communicates with the second ventilation port Ob2.
  • the other end of the duct 402 surrounds the opening 7b, is attached to the frame portion 7, and communicates with the opening 7b.
  • the duct 402 guides the air discharged to the outside of the housing 50 through the second vent Ob2 to the opening 7b and discharges the air to the outside of the rotary mount 6 (frame portion 7).
  • the ducts 401 and 402 are formed integrally with the frame portion 7. In order to enhance the air guiding effect, it is desirable that the duct 401 and the frame portion 7 and the duct 402 and the frame portion 7 are connected in an airtight manner. Similarly, it is desirable that one end of the duct 401 and one end of the duct 402 are airtightly attached to the peripheral wall portion 54, respectively.
  • the fan units 25a and 25b allow the air flowing around the radiator 24 to flow through the second vents Ob1 and Ob2 in the housing 50. It is discharged to the outside, and is released to the outside of the rotary mount 6 through the openings 7a and 7b.
  • the radiator 24 is not attached in close contact with the frame portion 7.
  • the sizes of the openings 7 a and 7 b do not have to be substantially the same as the size of the radiator 24, and can be made smaller than the size of the radiator 24. For this reason, the fall of the mechanical strength of the frame part 7 can be suppressed. Since there is no need for reinforcement such as making the frame portion 7 wide or thick, the apparatus can be reduced in size and weight.
  • the windward side of the radiator 24 is exposed in the space on the inner wall side of the frame portion 7. For this reason, the radiator 24 can be cleaned from the space on the inner wall side of the frame portion 7 only by removing a part of the housing 2, and dust accumulated on the radiator 24 can be removed. Since the radiator 24 can be cleaned without removing the cooling unit 20 from the rotating mount 6 and further removing the X-ray tube device 10 connected to the cooling unit 20, it takes a cleaning (maintenance work). Time can be shortened.
  • the radiator 24 is attached to the ceiling wall portion 53, and the fan units 25 a and 25 b are attached to the peripheral wall portion 54. For this reason, the circulation pump 22 and the air basin 60 can be placed on the bottom wall portion 51 without increasing the size of the housing 50. Since the circulation pump 22, the radiator 24, the fan units 25 a and 25 b, and the air tray 60 can be compactly attached to the rotating mount 6, the utilization efficiency of the space on the inner wall side of the frame portion 7 can be increased. Here, even if the circulation pump 22 and the air basin 60 are accommodated in the housing 50, the cooling performance of the heat exchanger 23 is maintained because the air flow around the radiator 24 is hardly adversely affected.
  • the rotation axis of the motor of the circulation pump 22 is parallel to the rotation axis a1 of the rotary mount 6. Since the gyro moment does not act on the rotating shaft of the motor of the circulation pump 22, the product life of the circulation pump 22 can be extended.
  • the X-ray CT apparatus 1 that can prevent the mechanical strength from being lowered and can be cleaned without removing the radiator 24 from the rotary mount 6. Moreover, the X-ray CT apparatus 1 excellent in the utilization efficiency of the space on the inner wall side of the frame portion 7 can be obtained.
  • FIG. 16 is an enlarged schematic view showing a part of the X-ray CT apparatus 1 according to the sixth embodiment.
  • the X-ray CT apparatus 1 is formed without a duct 402.
  • the peripheral wall portion 54 does not include the second ventilation port Ob2.
  • the bottom wall portion 51 includes a third ventilation port Oc.
  • the fan unit 25b is attached to the housing 50 (bottom wall portion 51) and is positioned to face the third ventilation port Oc.
  • the opening 7b of the frame portion 7 is opposed to the third ventilation port Oc.
  • the mount 28 is attached to the bottom wall 51 that is removed from the opening 7b.
  • the fan unit 25b takes the air into the casing 50 through the first vent Oa and the radiator 24, and releases the air in the casing 50 to the outside of the rotary base 6 through the third vent Oc and the opening 7b.
  • the third ventilation port Oc and the opening 7b communicate with each other in an airtight manner.
  • the circulation pump 22 and the air basin 60 are mounted on the bottom wall 51 when the area of the bottom wall 51 is sufficient.
  • the third vent Oc may be formed in the bottom wall portion 51, and the fan unit 25b may be attached to the bottom wall portion 51.
  • the circulation pump 22 and the air basin 60 can be placed on the bottom wall portion 51 without increasing the size of the housing 50. Since the circulation pump 22, the radiator 24, the fan units 25 a and 25 b, and the air tray 60 can be compactly attached to the rotating mount 6, the utilization efficiency of the space on the inner wall side of the frame portion 7 can be increased.
  • the same effects as those of the fifth embodiment can be obtained. From the above, it is possible to obtain the X-ray CT apparatus 1 that can prevent the mechanical strength from being lowered and can be cleaned without removing the radiator 24 from the rotary mount 6. Moreover, the X-ray CT apparatus 1 excellent in the utilization efficiency of the space on the inner wall side of the frame portion 7 can be obtained.
  • FIG. 17 is an enlarged schematic view showing a part of the X-ray CT apparatus 1 according to the seventh embodiment.
  • 18 is a cross-sectional view showing a part of the X-ray CT apparatus 1 taken along line XVIII-XVIII in FIG.
  • the second vents Ob ⁇ b> 1 and Ob ⁇ b> 2 are opened in a direction parallel to the rotation axis a ⁇ b> 1 of the rotary mount 6.
  • the second vents Ob ⁇ b> 1 and Ob ⁇ b> 2 are formed side by side on one side wall portion of the peripheral wall portion 54.
  • the duct 401 communicates with the second vent Ob1 and the opening 7a.
  • the other duct (402) also communicates with the second vent Ob2 and the opening (7b).
  • the fan units 25a and 25b are axial fans.
  • the rotational axis of the axial fan is parallel to the rotational axis a1 of the rotary mount.
  • the fan units 25a and 25b are axial fans, and the rotational axis of the axial fan is parallel to the rotational axis a1. . Since the gyro moment does not act on the rotating shaft of the motor of the axial fan, the product life of the fan units 25a and 25b can be extended.
  • the same effects as those of the fifth embodiment can be obtained. From the above, it is possible to obtain the X-ray CT apparatus 1 that can prevent the mechanical strength from being lowered and can be cleaned without removing the radiator 24 from the rotary mount 6. Moreover, the X-ray CT apparatus 1 excellent in the utilization efficiency of the space on the inner wall side of the frame portion 7 can be obtained.
  • FIG. 19 is an enlarged schematic view showing a part of the X-ray CT apparatus 1 according to the eighth embodiment.
  • FIG. FIG. 20 is a cross-sectional view showing a part of the X-ray CT apparatus 1 taken along line XX-XX in FIG.
  • the bottom wall portion 51 includes third vents Oc1 and Oc2.
  • the heat exchanger 23 further includes fan units 25c and 25d.
  • the fan unit 25c is attached to the housing 50 (bottom wall portion 51) and is positioned to face the third ventilation port Oc1.
  • the fan unit 25d is attached to the housing 50 (bottom wall portion 51) and is positioned to face the third ventilation port Oc2.
  • the frame part 7 further has openings 7c and 7d.
  • the opening 7c of the frame part 7 faces the third ventilation port Oc1.
  • the opening 7d of the frame portion 7 faces the third ventilation port Oc2.
  • the mount 28 is attached to the bottom wall 51 that is out of the openings 7c and 7d.
  • the fan unit 25c takes the air into the casing 50 through the first vent Oa and the radiator 24, and discharges the air in the casing 50 to the outside of the rotary mount 6 through the third vent Oc1 and the opening 7c.
  • the fan unit 25d takes air into the housing 50 through the first ventilation port Oa and the radiator 24, and releases the air in the housing 50 to the outside of the rotating base 6 through the third ventilation port Oc2 and the opening 7d.
  • the third vent Oc1 and the opening 7c, and the third vent Oc2 and the opening 7d are connected in an airtight manner.
  • the circulation pump 22 and the air basin 60 are mounted on the bottom wall 51 when the area of the bottom wall 51 is sufficient.
  • the third vent holes Oc1 and Oc2 may be formed in the bottom wall portion 51, and the fan units 25c and 27d may be attached to the bottom wall portion 51.
  • the circulation pump 22 and the air basin 60 can be placed on the bottom wall portion 51 without increasing the size of the housing 50. Since the circulation pump 22, the radiator 24, the fan units 25 a, 25 b, 25 c, 25 d and the air basin 60 can be compactly attached to the rotary mount 6, the utilization efficiency of the space on the inner wall side of the frame portion 7 can be enhanced. Moreover, the cooling performance of the heat exchanger 23 can be further enhanced.
  • the same effects as those of the seventh embodiment can be obtained. From the above, it is possible to obtain the X-ray CT apparatus 1 that can prevent the mechanical strength from being lowered and can be cleaned without removing the radiator 24 from the rotary mount 6. Moreover, the X-ray CT apparatus 1 excellent in the utilization efficiency of the space on the inner wall side of the frame portion 7 can be obtained.
  • FIG. 21 is an enlarged schematic view showing a part of the X-ray CT apparatus 1 according to the ninth embodiment.
  • FIG. 22 is a cross-sectional view showing a part of the X-ray CT apparatus 1 taken along line XXII-XXII in FIG.
  • the second vent hole Ob is formed in the peripheral wall portion 54 instead of the second vent holes Ob ⁇ b> 1 and Ob ⁇ b> 2.
  • One end of the duct 403 surrounds the second ventilation port Ob, is attached to the peripheral wall portion 54, and communicates with the second ventilation port Ob.
  • the other end of the duct 403 surrounds the opening 7a, is attached to the frame part 7, and communicates with the opening 7a.
  • the duct 403 guides the air released to the outside of the housing 50 through the second vent Ob to the opening 7a, and releases it to the outside of the rotating mount 6 (frame portion 7).
  • the duct 403 is formed integrally with the frame portion 7. In order to enhance the cooling performance of the heat exchanger 23, it is desirable that the duct 403 and the peripheral wall portion 54 be connected in an airtight manner.
  • the fan units 25a and 25b are axial fans.
  • the rotational axis of the axial fan is parallel to the rotational axis a1 of the rotary mount.
  • the fan units 25 a and 25 b are attached to the duct 403.
  • the outer wall 404 of the fan unit 25a and the outer wall 405 of the fan unit 25b are formed by a part of the duct 403.
  • the fan units 25a and 25b are respectively attached to the duct 403.
  • the fan units 25a and 25b may not be unitized together with the casing 50, the radiator 24, and the like. In this case, the same effect as that of the seventh embodiment can be obtained.
  • the X-ray CT apparatus 1 that can prevent the mechanical strength from being lowered and can be cleaned without removing the radiator 24 from the rotary mount 6. Moreover, the X-ray CT apparatus 1 excellent in the utilization efficiency of the space on the inner wall side of the frame portion 7 can be obtained.
  • FIG. 28 is a front view showing the rotating gantry 6 of the comparative example of the X-ray CT apparatus, and the X-ray tube device 10, the cooling unit 20, and the X-ray detector 40 mounted on the rotating gantry 6.
  • the radiator 24 is located between the opening 7a and the fan unit 25.
  • the radiator 24 is attached in close contact with the frame portion 7.
  • the distance from the rotation axis a1 to the fan unit 25 is shorter than the distance from the rotation axis a1 to the radiator 24.
  • the size of the opening 7 a is almost the same as the size of the radiator 24.
  • the size of the opening 7 a is substantially the same as the size of the radiator 24. There is a need. Since the size of the opening 7a is increased, the mechanical strength of the frame 7 is reduced. In the above case, since it is necessary to reinforce the frame portion 7 by making it wide or thick, it is difficult to reduce the size and weight of the device.
  • the X-ray tube device connected to the cooling unit 20 is further removed when the cooling unit 20 is not removed from the rotating mount 6 or the cooling unit 20 and the X-ray tube device 10 are not separated. Since it is necessary to remove 10 together, it is difficult to reduce the time required for cleaning (maintenance work).
  • the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage.
  • Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiments. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.
  • the air basin 60 only needs to be attached to the circulation path 30, and may be provided separately from the cooling unit 20. As shown in FIG. 23, the air basin 60 may be provided in the X-ray tube apparatus 10. One end of the conduit 11c is airtightly attached to the conduit 11b. The opening 61a of the air basin 60 is in airtight communication with the conduit 11c.
  • FIG. 24 is a schematic configuration diagram showing a separated state of the X-ray tube apparatus 10 shown in FIG.
  • the X-ray tube apparatus 10 in the separated state includes an air basin 60. For this reason, without adding to the X-ray tube apparatus 10, leakage of the liquid (cooling liquid 9) to the outside in the X-ray tube apparatus 10 in the separated state can be prevented, and mixing of air inside is prevented. be able to.
  • the separated cooling unit 20 is configured to hardly absorb the volume change of the coolant 9. Therefore, by forming the conduits 21a, 21b, and 21c with hoses, the conduits 21a, 21b, and 21c can have a function of absorbing the volume change of the coolant 9. However, there are cases where the volume change of the coolant 9 cannot be sufficiently absorbed by the conduits 21a, 21b, and 21c alone. In this case, it is preferable to attach an air tray to the cooling unit 20 in the separated state.
  • FIG. 25 is a schematic configuration diagram showing a separated state of the cooling unit 20 shown in FIG.
  • the cooling unit 20 is provided with an air tray 90 as a bellows mechanism.
  • the air basin 90 is attached to the cooling unit 20 via a socket 85 and a conduit 86 that are connected to each other in an airtight and liquid-tight manner.
  • the plug 81 and the socket 85 form a coupler as a detachable joint, and are connected in an airtight and liquid-tight manner in the connected state.
  • the opening 91 a is in airtight communication with the conduit 86.
  • the X-ray CT apparatus 1 may further include a pressure detector 301, a pressure control device 302, a pressure adjustment mechanism 303, and a conduit 304.
  • the pressure detector 301 (pressure sensor) is airtightly attached to the case 61.
  • the pressure detector 301 detects the pressure (gas pressure) in the second region 64.
  • the pressure detector 301 transmits information on the detected pressure to the pressure control device 302.
  • the pressure control device 302 controls the driving of the pressure adjustment mechanism 303 based on the pressure information.
  • the pressure adjusting mechanism 303 is in airtight communication with the vent hole 65 via a conduit 304. In this example, it goes without saying that the second region 64 is not opened to the atmosphere.
  • the pressure adjustment mechanism 303 can adjust the gas pressure in the second region 64.
  • the gas pressure in the second region 64 can be adjusted to a positive pressure that is higher than the atmospheric pressure.
  • the pressure adjustment mechanism 303 functions as a pressure reduction mechanism, the gas pressure in the second region 64 can be adjusted to a negative pressure that is lower than the atmospheric pressure.
  • the pressure adjustment mechanism 303 reduces the pressure in the second region 64 to a negative pressure in order to increase the heat flow rate. To lower the boiling point of the coolant 9.
  • the pressure adjustment mechanism 303 adjusts the pressure in the second region 64 to atmospheric pressure, raises the boiling point of the coolant 9, and further corrects the pressure in the second region 64. The boiling point of the coolant 9 is further increased by adjusting the pressure.
  • the X-ray CT apparatus 1 preferably includes a temperature detector that detects the temperature of the coolant 9.
  • the temperature detector may detect the temperature of the coolant 9 upstream of the heat transfer surface of the X-ray tube 13.
  • the X-ray CT apparatus 1 may further include another temperature detector, and the other temperature detector may detect the temperature of the coolant 9 on the downstream side of the heat transfer surface of the X-ray tube 13.
  • the second region 64 of the air basin 60 may be sealed without being opened to the atmosphere.
  • the second region 64 is filled with gas, and the pressure is adjusted to a positive pressure. Since the boiling point of the coolant 9 can be raised, the occurrence of burnout can be avoided.
  • an aqueous coolant or insulating oil can be used as the coolant 9.
  • the aqueous coolant include those containing an antifreeze such as glycol water.
  • a centrifugal pump or a gear pump can be used as the circulation pump 22 .
  • the circulation pump 22, the radiator 24, the fan unit 25, and the air basin 60 may be housed in the housing 50 and unitized.
  • the air basin 60 may be directly or indirectly attached to the rotary mount 6 independently of the X-ray tube device 10 (housing 12), the circulation pump 22, the radiator 24, and the fan unit 25.
  • the circulation pump 22, the radiator 24, and the fan unit 25 may be housed in a housing 50 and unitized.
  • the X-ray tube device 10 (housing 12), the circulation pump 22, the radiator 24, the fan unit 25, and the air basin 60 may be directly or indirectly attached to the rotating mount 6 independently of each other.
  • the air basin 60 may be attached to the outer surface of the X-ray tube apparatus 10 (housing 12).
  • the radiator 24 has a flat plate shape and is arranged substantially parallel to the inner wall of the frame portion 7, but can be variously modified.
  • the radiator 24 may have an arbitrary shape, may be stacked, and may be disposed to be inclined with respect to the inner wall of the frame portion 7.
  • the radiator 24 may be attached so as to close a vent hole provided in the peripheral wall portion 54 of the housing 50.
  • the fan unit 25 is directly attached to the opening 7a of the rotating gantry 6 as shown in the second to fourth embodiments to secure mechanical strength.
  • the radiator 24, the air basin 60, and the circulation pump 22 that are attached in communication with the circulation path are preferably attached to dedicated mounts fixed to the rotary mount 6.
  • at least one of the circulation pump 22, the duct 26, and the air basin 90 is housed in a single casing together with the radiator 24, and the casing is used as a rotating base. 6 can be mounted so as to be located immediately above the fan unit.
  • the ducts 401, 402, and 403 may be provided as necessary.
  • the heat exchanger 23 may have a plurality of radiators 24.
  • the plurality of radiators 24 may be stacked. In that sense, the radiator is hereinafter referred to as a radiator unit.
  • the housing 50 may have a shape that can increase the surface area of the radiator unit 24.
  • the housing 50 may have a ceiling wall that includes a vent and protrudes into a roof shape.
  • the ceiling wall is formed in a mountain shape.
  • the radiator unit 24 is housed in the housing 50 so that the windward side is exposed to the outside of the housing 50 through the vent hole.
  • the frame portion 7 is provided with a vent hole, and the air flow that has passed through the radiator unit 24 is discharged to the outside of the rotating mount 6 (on the side opposite to the rotation center axis a1) through this vent hole. Said about the case.
  • the frame portion 7 is not provided with a vent hole, the flow of air passing through the radiator unit 24 and the air discharged from the inside of the cooling unit casing to the outside of the cooling unit casing through the vent holes of the cooling unit casing. If the flow is away from the rotation center axis a1, the heated air will not be trapped inside the X-ray CT apparatus housing 2, so that the temperature of the internal atmosphere of the housing 2 is raised or cooled. It is possible to avoid impairing the cooling performance of the unit and the stability of the sensitivity of the X-ray detector.
  • the embodiment of the present invention is not limited to the above-described X-ray CT apparatus, and can be applied to various X-ray CT apparatuses and other X-ray diagnostic apparatuses.
  • FIG. 29 shows an external appearance of a CT (Computer Tomography) apparatus according to the embodiment
  • FIG. 30 schematically shows an internal structure in the CT apparatus shown in FIG.
  • the CT apparatus includes a gantry 600.
  • the gantry 600 includes a rotating body 505 that is rotated around a rotation center axis 504, a support structure (not shown) that rotatably supports the rotating body 5, and the rotating body.
  • the housing 608 surrounds 505.
  • a cavity 540 into which a bed 620 on which a subject is laid enters is provided as an imaging region. When imaging the subject, the bed 620 is advanced into the cavity 540 and the subject is placed in the imaging region.
  • the rotator 505 is composed of an annular frame, and an X-ray generator 502 having a collimator (not shown) is fixed to the rotator 505 so as to generate X-rays in the form of a fan beam. . Further, an X-ray detector 508 that is arranged to face the X-ray generator 502 through the imaging region of the cavity 540 and detects fan-beam X-rays is also fixed to the rotating body 505. Further, a cooling machine 510 for cooling an X-ray generator 502, which will be described in detail later, is fixed to the rotating body 505.
  • the rotating body 505 is rotated in a state where a bed 620 on which a subject (not shown) is laid has entered the cavity 540, and an X-ray fan beam is generated from the X-ray generator 502.
  • a subject (not shown) is irradiated and transmitted X-rays are detected by an X-ray detector 508.
  • the X-ray fan beam is irradiated from various directions around the subject, and X-rays from various locations in the subject are detected by the X-ray detector 508.
  • a detection signal from the X-ray detector 508 is output to the outside of the rotating body 505 and supplied to an image reconstruction processing unit (not shown), and this output signal is processed by the image reconstruction processing unit, so The transmittance at various locations is calculated, and a tomographic image of the subject is reconstructed.
  • the cooler 510 is connected to the X-ray generator 2 by a pipe 506 that circulates a coolant, and the heat generated in the X-ray generator 502 is given to the coolant and passed through the pipe 506 for exhaust heat. Then, the coolant supplied to the cooler 510 and cooled by the cooler 510 is supplied to the X-ray generator 502 via the pipe 506 for heat absorption.
  • a base 531 is provided on the cooler fixing surface 552 of the cooler mounting portion 551 on the frame of the rotating body 505 on which the cooler 510 is placed and fixed.
  • the base 531 is formed on the frame of the rotating body 505.
  • a plurality of exhaust ports 517A and 517B communicating with the exhaust unit 522 are provided.
  • a plurality of support columns 518A and 518B are erected on the support column fixing surface 532 of the base 531 adjacent to the outer periphery of the base 531, and are connected and fixed to the support column fixing surface 532 with a connecting member such as a screw.
  • a cooler casing cover 511 fixed to the base 531 is provided around the plurality of support columns 518A and 518B, and a space surrounded by the cooler casing cover 511 is defined as an exhaust space. Yes.
  • the cooler 510 includes a plurality of cooling fans 513A and 513B as a plurality of fan units.
  • the cooling fans 513A and 513B are disposed on the exhaust ports 517A and 517B and are disposed so as to be surrounded by the cooler casing cover 511. Further, a radiator unit 512 is fixed over the entire surface of the exhaust space exhausted by the cooling fans 513A and 513B on the side of the rotation center shaft 504 so as to cover the opening of the cooler casing cover 511.
  • the cooler casing 611 includes a cooler casing cover 511, encloses the internal components of the cooler 510, defines the internal space of the cooler 510, defines an exhaust space on the base 531, and the radiator unit 512. Is defined.
  • the support structure 560 is fixed to the support fixing surface 532 of the base 531 via the support columns 518A and 518B to support the radiator unit 512, and the support structure 560 is erected on the support fixing surface 532. It has columns 518A and 518B and a fixing base 520 for attaching and fixing the radiator unit 512. More specifically, the fixed base 520 is fixed to the fixed base fixing surfaces 681A and 681B of the plurality of columns 518A and 518B, and the plurality of radiators 519A and 519B constituting the radiator unit 512 are mounted and fixed on the fixed base 520. ing.
  • the radiators 519A and 519B have flow paths connected to each other in parallel.
  • the fixed base 520 is formed in a frame structure 523A, 523B in which a plurality of radiators 519A, 519B have a triangular roof shape (triangular roof type) such that the top is directed to the rotation center axis 4 side. More specifically, the fixed base 520 is attached to the attachment portions (plate-like members) 521A and 521B and the rear surfaces (surfaces directed to the exhaust space) of the attachment portions 521A and 521B as shown in an enlarged view of the AA cross section. Adjacent cross sections of L-shaped or T-shaped plate-shaped reinforcing members (examples of L-shaped cross sections are shown) 522A and 522B are fixed.
  • each of the mounting portions 521A and 521B forming the fixed base 520 and one end of each of the reinforcing members 522A and 522B are fixed to the fixed base fixing surfaces 681A and 681B on the rotation center axis 504 side of the plurality of columns 518A and 518B with fixing members such as screws.
  • the other ends of the mounting portions 521A and 521B and the other ends of the reinforcing members 522A and 522B are brought into contact with each other so as to form a roof-like (roof-like) top portion, and are fixed by a fixing member such as a screw.
  • the radiators 519A and 519B are mounted and fixed on the fixed base 520 having such a structure, the radiators 519A and 519B are similarly arranged in a roof shape (roof shape). Accordingly, the plurality of radiators 519A, 519B have intake ports 516A, 516B on the front surface on the rotation center axis 4 side, and the intake ports 516A, 516B constitute the intake inlet 516 of the cooler 510.
  • Pumps 514A and 514B shown in FIG. 31 are connected to the radiator unit 512 as circulation pumps.
  • a pipe 506 is connected to the pumps 514A and 514B.
  • the coolant heated by the X-ray generator 502 is supplied to the pumps 514A and 514B via the pipe 506, and is supplied from the pumps 514A and 514B to the radiator unit 512.
  • the radiator unit 512 is composed of a plurality of radiators 519A and 519B whose flow paths are connected in parallel to each other, the coolant is supplied in parallel to the radiators 519A and 519B from the pumps 514A and 514B, respectively. Supplied.
  • the cooling liquid cooled by the radiator unit 512 is merged after passing through the radiators 519A and 519B, and is supplied from the radiator unit 512 to the X-ray generator 502 via the pipe 506.
  • the radiators 519A and 519B are And a heat radiating pipe (not shown) for circulating the coolant and releasing the heat to the surrounding air and a heat radiating fin (not shown) connected to the heat radiating pipe to increase the heat radiating area.
  • the cooling fans 513A and 513B are surrounded by the cooler casing cover 511 and the radiator unit 512, and the intake air flow S from the outside of the cooler 510 through the intake ports 516A and 516B in accordance with the fan operation of the cooling fans 513A and 513B.
  • the intake air flow S that passes through 512 and flows into the exhaust space is exhausted to the outside of the exhaust space as the exhaust flow V through the exhaust part 522 by the cooling fans 513A and 513B. Therefore, in the radiator unit 512, the heated coolant is cooled by the intake air flow S, and heat exchange occurs such that the intake air flow S is heated by the coolant.
  • the heat of the X-ray generator 502 is It is discharged outside the cooler 510.
  • the base 531 is provided with a base first fixing portion 811 for fixing the base 531 to the cooler fixing surface 552 adjacent to one side on the upstream side in the rotation direction R of the rotating body 5 of the base 531.
  • a second base fixing portion 812 for fixing the heat sink to the cooler fixing surface 552 is provided adjacent to one side on the downstream side in the rotation direction R of the rotating body 5 of the base 531.
  • the height H1 of the top portion 612 of the cooler casing 611 from the cooler fixing surface 552 is set to be smaller than the distance D1 between the base first fixing portion 811 and the base second fixing portion 812.
  • the support structure 560 includes a plurality of support columns having a support structure first fixing portion 901 for fixing the support structure 560 to the support fixing surface 532 on the upstream side in the rotation direction R of the rotating body 505 of the support structure 560.
  • a support structure second fixing portion 902 provided on the support structure 560 for fixing the support structure 560 to the support fixing surface 532 is provided on the plurality of supports 518B on the downstream side with respect to the rotation direction R of the rotating body 505 of the support structure 560. Is provided.
  • the height H2 of the top portion 621 of the radiator unit 512 from the support fixing surface 532 is set to be smaller than the distance D2 between the support structure first fixing portion 901 and the support structure second fixing portion 902.
  • the fixed pedestal 520 includes a frame having a fixed pedestal first fixing portion 701 for fixing the fixed pedestal 520 to the fixed pedestal fixing surface 681A of the plurality of columns 518A on the upstream side in the rotation direction R of the rotating body 505 of the fixed pedestal 520.
  • a frame provided in the structure 523A and having a fixed base second fixing portion 702 on the downstream side in the rotation direction R of the rotating body 505 of the fixed base 520, for fixing the fixed base 520 to the fixed base fixing surface 681B of the plurality of columns 518B.
  • the height H3 of the top 621 of the radiator unit 512 from the fixed base fixing surfaces 681A and 681B is set to be smaller than the distance D3 between the fixed base first fixing part 701 and the fixed base second fixing part 702.
  • the centrifugal force F 0 directed in the radial direction of the rotator 505 acts on the cooler 510.
  • the rotating body 505 is rotated at a high speed, and a centrifugal force F 0 of 32 G or more is applied to the radiator unit 512.
  • the centrifugal force F 0 applied to the radiator unit 512 is loaded on a roof-like (roof-type) fixed base 520 that forms the support structure of the radiator unit 512.
  • the fixed base 520 has a plate-like portion of the reinforcing members 522A and 522B in the direction in which the centrifugal force F0 is directed (a portion of one side of the L-shape or T-shape and having a width along the centrifugal force F0). ) Is provided, the fixed base 520 can sufficiently withstand the load of the centrifugal force F0. Since the fixed base 520 is not a simple plate, the deformation of the fixed base 520 is prevented. Is done.
  • the load applied to the fixed base 520 is along the direction of the roof (roof), that is, along the extending direction of the mounting portions (plate members) 521A and 521B, and the fixed portions 701 and 702 of the fixed base 520. Is transmitted to the bases 531 having sufficient rigidity.
  • the cooler 510 is directed in a direction opposite to the rotation direction R of the rotating body 505.
  • the inertial force F1 is applied.
  • the cooler 510 is fixed to the cooler fixing surface 552 and the inertial force F1 acts on the position of the height H11 of the center of mass C1 of the cooler 510 from the cooler fixing surface 552, the inertial force F1 is A moment M1 (multiplication of F1 and H11) is generated with respect to the fixed portion of the cooler 510 (that is, the base first fixed portion 811 and the base second fixed portion 812).
  • the moment M1 generates a pair of reaction forces R1 acting on the base first fixing portion 811 and the base second fixing portion 812, and a moment (a multiplication of R1 and D1) due to a couple consisting of the pair of reaction forces R1.
  • the reaction force R1 acts as a load on a fixing member such as a screw in the fixing portion.
  • the moment M1 works as an action of pulling the cooler 510 away from the cooler fixing surface 552, and may cause damage to fixing members such as screws in the base first fixing portion 811 and the base second fixing portion 812, and should be kept small. .
  • the height H1 of the top portion 612 of the cooler casing 611 from the cooler fixing surface 552 is set to be smaller than the distance D1 between the base first fixing portion 811 and the base second fixing portion 812. Therefore, the height H11 (smaller than H1) of the mass center C1 of the cooler 510 from the cooler fixing surface 552 is also kept small, and the distance between the base first fixing portion 811 and the base second fixing portion 812 is reduced. It is smaller than D1. As a result, the magnitude of R1 of the pair of reaction forces acting on the base first fixing portion 811 and the base second fixing portion 812 is reduced to be smaller than the inertial force F1.
  • a load acting on a fixing member such as a screw of the fixing portion (base first fixing portion 811 and base second fixing portion 812) of the cooler 510 at the time of acceleration of rotation of the rotating body can be suppressed to be small and damage can be prevented. Can do.
  • the support structure 560 and the radiator unit 512 fixed to the support structure 560 include The inertial force F2 directed in the direction opposite to the rotation direction R of the rotating body 505 acts.
  • the support structure 560 is fixed to the support fixing surface 532, and the inertia force F2 acts on the position of the height H21 of the total mass center C2 of the support structure 560 and the radiator unit 512 from the support fixing surface 532. Therefore, the inertial force F2 generates a moment M2 (multiplication of F2 and H21) with respect to the fixed portion (support structure first fixed portion 901 and support structure second fixed portion 902) of the support structure 560.
  • the moment M2 generates a pair of reaction forces R2 acting on the support structure first fixing portion 901 and the support structure second fixing portion 902, and the moment (R2 and the moment due to the couple consisting of the pair of reaction forces R2) D2 multiplication).
  • the reaction force R2 acts as a load on a fixing member such as a screw in the fixing portion.
  • the moment M2 works as an action of pulling the support structure 560 away from the support fixing surface 532, and may cause damage to fixing members such as screws in the support structure first fixing portion 901 and the support structure second fixing portion 902. It is necessary to suppress.
  • the height H2 of the top 621 of the radiator unit 512 from the support fixing surface 532 is set to be smaller than the distance D2 between the support structure first fixing portion 901 and the support structure second fixing portion 902. Therefore, the height H21 (smaller than H2) of the total mass center C2 of the support structure 560 and the radiator unit 512 from the support fixing surface 532 is also kept small, and the support structure first fixing portion 901 and the support unit 901 are supported. It is smaller than the distance D2 between the structure second fixing portions 902. As a result, the magnitude of the pair of reaction forces R2 acting on the support structure first fixing portion 901 and the support structure second fixing portion 902 is smaller than the inertia force F2.
  • a load acting on a fixing member such as a screw of the fixing portion (the supporting structure first fixing portion 901 and the supporting structure second fixing portion 902) of the support structure 560 at the time of acceleration of rotation of the rotating body can be suppressed to be small. Can prevent damage.
  • the rotating body 505 when the rotating body 505 is accelerated and rotated as indicated by the rotation direction R when the rotating body starts rotating, the fixed base 520 and the radiator unit 512 fixed to the fixed base 520 are rotated.
  • Inertial force F3 directed in the direction opposite to the rotation direction R of the body 505 acts.
  • the fixed pedestal 520 is fixed to the fixed pedestal fixing surfaces 681A and 681B, and the inertia force F3 is at the height H31 of the total center of mass C3 of the fixed pedestal 520 and the radiator unit 512 from the fixed pedestal fixing surfaces 681A and 681B.
  • the inertia force F3 generates a moment M3 (multiplication of F3 and H31) with respect to the fixed portion of the fixed base 520 (the fixed base first fixed portion 701 and the fixed base second fixed portion 702).
  • the moment M3 generates a pair of reaction forces R3 acting on the fixed pedestal first fixing portion 701 and the fixed pedestal second fixing portion 702, and a moment (R3 and D3 between the pair of reaction forces R3).
  • the reaction force R3 acts as a load on a fixing member such as a screw in the fixing portion.
  • the moment M3 works as an action of separating the fixed base 520 from the fixed base fixing surfaces 681A and 681B, and may cause damage to fixing members such as screws in the fixed base first fixing portion 701 and the fixing base second fixing portion 702. It is necessary to suppress.
  • the height H3 of the top 621 of the radiator unit 512 from the fixed base fixing surfaces 681A and 681B is smaller than the distance D3 between the fixed base first fixing part 701 and the fixed base second fixing part 702. Therefore, the height H31 (smaller than H3) of the total mass center C3 of the fixed base 520 and the radiator unit 512 from the fixed base fixing surfaces 681A and 681B can be kept small, and the fixed base first fixing portion 701 is fixed. And a distance D3 between the fixed base second fixing portion 702 and the fixed base second fixing portion 702. As a result, the magnitude of the pair of reaction forces R3 acting on the fixed base first fixing part 701 and the fixed base second fixing part 702 is reduced to be smaller than the inertial force F3.
  • the load acting on the fixing member such as the screw of the fixing portion of the fixing base 520 (the fixing base first fixing portion 701 and the fixing base second fixing portion 702) at the time of acceleration of the rotation of the rotating body can be suppressed to be small and damage can be caused. Can be prevented.
  • the power supply of the X-ray generator 502 is provided in the gantry 600 outside the rotating body 505 via a slip ring (not shown) or the like.
  • power supplies (not shown) for the cooling fans 513A and 513B and the pumps 514A and 514B may be provided on the rotating body 505, or the rotating body 505 is similar to the power supply apparatus for the X-ray generator 502. It may be provided in the outside gantry 600.
  • the radiator unit 512 is supported by the support structure having improved rigidity, and thus is not deformed.
  • the possibility of breakage of parts such as a heat radiating tube is reduced, and the resistance to centrifugal force is improved.
  • the centrifugal force can be reliably distributed and supported. Further, it is possible to reduce the weight of a portion of the cooler 510 where a load of components such as the radiator unit 512 does not act, for example, a portion where the centrifugal force such as the cooler housing cover 511 does not act.
  • the base 531 is fixed to the rotating body, even if a load due to the centrifugal force of the pumps 514A, 514B, the cooling fans 513A, 513B, and the power supply device (not shown) is applied, the deformation of the base is reduced. The possibility of part breakage is reduced. As a result, the resistance of the cooler can be improved.
  • the reaction force R1 acting on the fixed portion is reduced to the inertial force F1 or less, the reaction force R2 is reduced to the inertial force F2 or less, the reaction force R3 is reduced to the inertial force F3 or less, and the load acting on the fixing member such as a screw of the fixed portion. Can be kept small and damage can be prevented. As a result, the resistance of the cooler can be improved.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Medical Informatics (AREA)
  • Radiology & Medical Imaging (AREA)
  • Molecular Biology (AREA)
  • Biophysics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Optics & Photonics (AREA)
  • Pathology (AREA)
  • Physics & Mathematics (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Pulmonology (AREA)
  • Theoretical Computer Science (AREA)
  • X-Ray Techniques (AREA)
  • Apparatus For Radiation Diagnosis (AREA)

Abstract

La présente invention concerne un dispositif à liquide de refroidissement qui comprend un boîtier, une unité de radiateur fixée au boîtier et à un trajet de circulation dans lequel circule un fluide de refroidissement et qui évacue vers l'extérieur la chaleur provenant du fluide de refroidissement, ainsi qu'une unité de ventilateur logée dans le boîtier et qui crée un flux d'air à la périphérie de l'unité de radiateur. Le côté exposé au vent de l'unité de radiateur est exposé à l'extérieur du boîtier.
PCT/JP2012/069744 2011-08-05 2012-08-02 Dispositif à liquide de refroidissement, dispositif de tomographie par calculateur aux rayons x et son procédé d'entretien WO2013021919A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201280037927.1A CN103732145B (zh) 2011-08-05 2012-08-02 冷却器、x射线计算机断层照相装置及x射线计算机断层照相装置的保养方法
US14/173,556 US9351694B2 (en) 2011-08-05 2014-02-05 Cooler, X-ray computed tomography apparatus, and maintenance method of X-ray computed tomography apparatus

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP2011172027 2011-08-05
JP2011-172027 2011-08-05
JP2011-211486 2011-09-27
JP2011211486 2011-09-27
JP2012-147432 2012-06-29
JP2012147432A JP5902054B2 (ja) 2011-08-05 2012-06-29 Ｘ線コンピュータ断層撮影装置
JP2012-169319 2012-07-31
JP2012169319A JP2013084572A (ja) 2011-09-27 2012-07-31 冷却機

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Publication number Priority date Publication date Assignee Title
CN103400738A (zh) * 2013-08-23 2013-11-20 苏州明威医疗科技有限公司 一种x光管直接蒸汽压缩式制冷系统
CN111110263A (zh) * 2018-10-31 2020-05-08 通用电气公司 扫描架的外装和医用装置
CN114901048A (zh) * 2022-05-25 2022-08-12 扬州市职业大学(扬州开放大学) 一种基于绿色建筑的建筑节能改造方法

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JPS63180010U (fr) * 1987-05-15 1988-11-21
JPH07194587A (ja) * 1994-01-10 1995-08-01 Toshiba Corp Ｘ線ｃｔ装置
JPH10179566A (ja) * 1996-11-07 1998-07-07 General Electric Co <Ge> Ｘ線管冷却流体から熱を除去する装置
JP2000116639A (ja) * 1998-10-16 2000-04-25 Toshiba Corp Ｘ線ｃｔ装置
JP2003144425A (ja) * 2001-11-13 2003-05-20 Shimadzu Corp Ｘ線ｃｔ装置
JP2004344667A (ja) * 2003-05-22 2004-12-09 Ge Medical Systems Global Technology Co Llc 最適化させたｘ線管冷却デバイス
JP2007123212A (ja) * 2005-10-31 2007-05-17 Toshiba Corp Ｘ線管装置、ｘ線管装置の連結器の連結方法及びｘ線管装置の連結器の離脱方法
JP2007514287A (ja) * 2003-12-10 2007-05-31 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Ｘ線管用の気流束ダイレクタシステム
JP2009268830A (ja) * 2008-05-09 2009-11-19 Toshiba Corp Ｘ線コンピュータ断層撮影装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63180010U (fr) * 1987-05-15 1988-11-21
JPH07194587A (ja) * 1994-01-10 1995-08-01 Toshiba Corp Ｘ線ｃｔ装置
JPH10179566A (ja) * 1996-11-07 1998-07-07 General Electric Co <Ge> Ｘ線管冷却流体から熱を除去する装置
JP2000116639A (ja) * 1998-10-16 2000-04-25 Toshiba Corp Ｘ線ｃｔ装置
JP2003144425A (ja) * 2001-11-13 2003-05-20 Shimadzu Corp Ｘ線ｃｔ装置
JP2004344667A (ja) * 2003-05-22 2004-12-09 Ge Medical Systems Global Technology Co Llc 最適化させたｘ線管冷却デバイス
JP2007514287A (ja) * 2003-12-10 2007-05-31 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Ｘ線管用の気流束ダイレクタシステム
JP2007123212A (ja) * 2005-10-31 2007-05-17 Toshiba Corp Ｘ線管装置、ｘ線管装置の連結器の連結方法及びｘ線管装置の連結器の離脱方法
JP2009268830A (ja) * 2008-05-09 2009-11-19 Toshiba Corp Ｘ線コンピュータ断層撮影装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103400738A (zh) * 2013-08-23 2013-11-20 苏州明威医疗科技有限公司 一种x光管直接蒸汽压缩式制冷系统
CN111110263A (zh) * 2018-10-31 2020-05-08 通用电气公司 扫描架的外装和医用装置
CN111110263B (zh) * 2018-10-31 2023-10-20 通用电气公司 扫描架的外装和医用装置
CN114901048A (zh) * 2022-05-25 2022-08-12 扬州市职业大学(扬州开放大学) 一种基于绿色建筑的建筑节能改造方法
CN114901048B (zh) * 2022-05-25 2023-10-20 扬州市职业大学(扬州开放大学) 一种基于绿色建筑的建筑节能改造方法

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