EP3291278B1 - Magnetron - Google Patents
Magnetron Download PDFInfo
- Publication number
- EP3291278B1 EP3291278B1 EP16786094.9A EP16786094A EP3291278B1 EP 3291278 B1 EP3291278 B1 EP 3291278B1 EP 16786094 A EP16786094 A EP 16786094A EP 3291278 B1 EP3291278 B1 EP 3291278B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling block
- fastener
- magnetron
- pipe joints
- anode cylinder
- Prior art date
- Legal status (The legal status 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 status listed.)
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Links
- 238000001816 cooling Methods 0.000 claims description 149
- 230000002093 peripheral effect Effects 0.000 claims description 33
- 239000000110 cooling liquid Substances 0.000 claims description 20
- 239000000463 material Substances 0.000 description 10
- 238000004873 anchoring Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000003993 interaction Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
- H01J25/50—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field
- H01J25/52—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode
- H01J25/58—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode having a number of resonators; having a composite resonator, e.g. a helix
- H01J25/587—Multi-cavity magnetrons
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/005—Cooling methods or arrangements
Definitions
- the present disclosure relates to magnetrons that generate microwaves.
- the fastener is disposed between the pair of pipe joints, and a discontinuous part between both ends of the cooling block facing each other extends in a tilted manner in the annular direction of the cooling block relative to the flow direction of the cooling liquid at a connecting part of the pair of pipe joints and circulation passage.
- the fastener passing the discontinuous part extends in a direction tilted in a face perpendicular to the flow direction of the cooling liquid at the connecting part of the pair of pipe joints and circulation passage.
- the fastener is engaged with both ends of the cooling block facing each other, and pushes an inner peripheral face of the cooling block toward the outer peripheral face of the anode cylinder by tightening and narrowing a distance between both ends.
- the pair of pipe joints are provided on the outer peripheral face of the cooling block to communicate with the circulation passage.
- the fastener extends in a direction perpendicular to the discontinuous part in the first embodiment.
- the embodiment enables to further uniformly tighten the cooling block and the anode cylinder, and thus further reliable tightening becomes feasible.
- the fastener extends in a direction parallel to a plane including the annular direction of the cooling block in the first embodiment.
- the embodiment enables to further reliably tighten the cooling block and anode cylinder, compared to a case of extending the fastener in a direction tilted relative to a plane including the annular direction of the cooling block.
- space S is set to, for example, about 3 mm before being tightened.
- cooling block 10 in the exemplary embodiment also offers high flexibility in setting the extending direction of fastener 15.
- the exemplary embodiment refers to the case that pipe joints 14a and 14b have a straight shape with the Y direction in the longer-hand direction.
- the present disclosure is not limited to this structure.
- a range of shapes e.g., L shape
- the flow direction of the cooling liquid at the connecting parts of pair of pipe joints 14a and 14b and circulation passage 9 and the longer-hand direction of pipe joints 14a and 14b match the Y direction.
Landscapes
- Microwave Tubes (AREA)
Description
- The present disclosure relates to magnetrons that generate microwaves.
- Magnetrons that generate microwaves have been employed in magnetron utilization equipment, such as microwave ovens, and are available in various structures. To remove heat generated by magnetrons, in line with generation of microwaves, an air cooling system and liquid cooling system have been employed. Magnetrons adopting the liquid cooling system use a cooling block with a circulation passage for cooling liquid (e.g., PTL1).
- A structure of a liquid-cooling magnetron in PTL1 is described with reference to
Fig. 9 showing the entire structure of the magnetron, andFig. 10 showing a structure of the cooling block. - As shown in
Fig. 9 ,cooling block 110 provided inmagnetron 100 is closely attached along an outer peripheral face of an anode cylinder (not illustrated) inyoke 106.Cooling block 110 has acirculation passage 112 inside for passing liquid for cooling the anode cylinder. - As shown in
Fig. 10 ,cooling block 110 is made of a material having a cooling function and formed in an approximately rectangular-parallelepiped shape.Inlet pipe joint 112A andoutlet pipe joint 112B communicated withcirculation passage 112 are connected to one side face of rectangularparallelepiped cooling block 110. -
Cooling block 110 includes an annular continuous part around the outer peripheral face of the anode cylinder, and a discontinuous part where both ends of the annular continuous part face each other. More specifically,flange 114 is formed at each end of the annular continuous part and an annular discontinuous part is located between mutually-facingflanges 114. - Each
flange 114 has throughhole 115, and fastener 116 communicates with opposing throughholes 115 and is screwed. This narrows a distance between flanges 14 and an inner peripheral face ofcooling block 110 is tightened to closely attach to an outer peripheral face of the anode cylinder. - PTL1: Japanese Patent Unexamined Publication No.
2011-192459 -
Cooling block 110 in aboveconventional magnetron 100 is formed as an integral component with desired shape by cutting a substantially rectangular-parallelepiped material. - However, in
cooling block 110 in PTL1,flange 114 is formed at both ends of the annular continuous part for fasteningcooling block 110.Flanges 114 are larger than the connecting faces ofpipe joints - To cut the substantially rectangular-parallelepiped material to form the shape of
cooling block 110 in PTL1, a large portion of material is cut and wasted. - In the
state pipe joints cooling block 110, it may be difficult to insertfastener 116 into throughholes 115 inflanges 114. It may also become difficult to gain access to fastener 116 in the state engaged withflanges 114. - Accordingly, an object of the present disclosure is to solve the above disadvantages, and offer a magnetron that can reduce wasted material in fabricating the cooling block, and ensure a good access to the pipe joint and fastener.
- To achieve the above object, a magnetron in an exemplary embodiment of the present disclosure includes an anode cylinder, a cooling block, a fastener, and a pair of pipe joints.
- The cooling block is an integral component having an annular shape in which both ends of an annular continuous part face each other. The cooling block is fastened on an outer peripheral face of the anode cylinder to surround the anode cylinder. In addition, the cooling block has a cooling liquid circulation passage inside, so as to cool the anode cylinder.
- The fastener is engaged with both ends of the cooling block facing each other. An inner peripheral face of the cooling block is pushed toward the outer peripheral face of the anode cylinder by tightening the fastener to narrow a distance between both ends. A pair of pipe joints are provided on the outer peripheral face of the cooling block, so as to communicate with the circulation passage.
- The fastener is disposed between the pair of pipe joints, and a discontinuous part between both ends of the cooling block facing each other extends in a tilted manner in the annular direction of the cooling block relative to the flow direction of the cooling liquid at a connecting part of the pair of pipe joints and circulation passage. The fastener passing the discontinuous part extends in a direction tilted in a face perpendicular to the flow direction of the cooling liquid at the connecting part of the pair of pipe joints and circulation passage.
- The exemplary embodiment can offer a magnetron that can reduce wasteful material in fabrication of the cooling block, and also secure a good access to the pipe joints and fastener.
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Fig. 1 is a perspective view of an entire structure of a magnetron in accordance with an exemplary embodiment of the present disclosure. -
Fig. 2 is a bottom view of the magnetron in accordance with the exemplary embodiment. -
Fig. 3 is a perspective view of a cooling block provided in the magnetron in accordance with the exemplary embodiment. -
Fig. 4 is a perspective view in a state that a pipe joint and a fastener are removed from the cooling block inFig. 3 . -
Fig. 5 is a plan sectional view of the cooling block inFig. 3 . -
Fig. 6 is a perspective view of an entire structure of a cooling block in a modified example of the exemplary embodiment. -
Fig. 7 is a perspective view of an entire structure of a cooling block in another modified view of the exemplary embodiment. -
Fig. 8 is a perspective view of an entire structure of a cooling block in still another modified view of the exemplary embodiment. -
Fig. 9 is a front view of an entire structure of a conventional magnetron. -
Fig. 10 is a perspective view of a structure of a cooling block in the conventional magnetron. - A magnetron in a first embodiment includes an anode cylinder, a cooling block, a fastener, and a pair of pipe joints.
- The cooling block is an integral component having an annular shape with both ends of an annular continuous part facing each other. The cooling block is fastened on an outer peripheral face of the anode cylinder such that the cooling block surrounds the anode cylinder. The cooling block also has a cooling liquid circulation passage inside, so as to cool the anode cylinder.
- The fastener is engaged with both ends of the cooling block facing each other, and pushes an inner peripheral face of the cooling block toward the outer peripheral face of the anode cylinder by tightening and narrowing a distance between both ends. The pair of pipe joints are provided on the outer peripheral face of the cooling block to communicate with the circulation passage.
- The fastener is disposed between the pair of pipe joints, and a discontinuous part between both ends of the cooling block facing each other extends in a tilted manner in the annular direction of the cooling block relative to the flow direction of the cooling liquid at a connecting part of the pair of pipe joints and circulation passage. The fastener passing the discontinuous part extends in a direction tilted relative to a face perpendicular to the flow direction of the cooling liquid at the connecting part of the pair of pipe joints and circulation passage.
- In the embodiment, the discontinuous part and fastener in the cooling block are disposed in a tilted manner so that interference of these components can be suppressed at gaining access to the pipe joints and the fastener. Accordingly, a good access to the pipe joints and the fastener is secured.
- Since interference with one of the fastener and the pipe joint at gaining access to the other of the fastener and the pipe joint can be suppressed, layout flexibility of the pipe joints on a connecting face in the cooling block can be increased. Accordingly, the pipe joints and fastener can be disposed in a layout that can reduce a cut and wasted part on cutting out the cooling block.
- In a magnetron in a second embodiment, a recess is formed between a pair of pipe joints in the first embodiment, and at least a part of the fastener is disposed in the recess. By forming the recess for inserting the fastener in the embodiment, interference with each component at gaining access to the pipe joints or fastener can be suppressed. Accordingly, a good access to the pipe joints and fastener can be secured.
- In a magnetron in a third embodiment, one end of the fastener is disposed in the recess in the second embodiment. This layout enables to place the fastener without being protruded from the outer peripheral face of the cooling block. An interference with the fastener at particularly gaining access to the pipe joints can be suppressed. Accordingly, a good access to the pipe joints and fastener can be secured.
- In a magnetron in a fourth embodiment, the fastener extends in a direction perpendicular to the discontinuous part in the first embodiment. The embodiment enables to further uniformly tighten the cooling block and the anode cylinder, and thus further reliable tightening becomes feasible.
- In a magnetron in a fifth embodiment, the discontinuous part extends along a radial direction of the anode cylinder disposed in the cooling block in the first embodiment. The embodiment enables to further uniformly tighten the cooling block and the anode cylinder, and thus further reliable tightening becomes feasible.
- In a magnetron in a sixth embodiment, the cooling block has substantially a rectangle outer periphery, and a connecting face is provided on one end of the outer periphery in the first embodiment. This embodiment can reduce wasted material in cutting out the cooling block, and also secure a good access to the pipe joints and fastener while adopting a centralized layout of disposing the pipe joints and fastener on one end in the outer periphery.
- In a magnetron in a seventh embodiment, a connecting face of the cooling block to which one of the pair of pipe joints is connected is provided on substantially the same plane as a connecting face of the cooling block to which the other of the pair of pipe joints is connected in the first embodiment. The embodiment facilitates fabrication of the cooling block.
- In a magnetron in an eighth embodiment, the fastener extends in a direction parallel to a plane including the annular direction of the cooling block in the first embodiment. The embodiment enables to further reliably tighten the cooling block and anode cylinder, compared to a case of extending the fastener in a direction tilted relative to a plane including the annular direction of the cooling block.
- In a magnetron in a ninth embodiment, the fastener extends in a direction tilted relative to a plane including the annular direction of the cooling block in the first embodiment. The embodiment enables to reduce an area of the recess in the connecting face of the cooling block, compared to a case of extending the fastener in the plane including the annular direction of the cooling block. Accordingly, the embodiment can improve the tightening strength of the cooling block and anode cylinder at the connecting face.
- An exemplary embodiment of the present disclosure is detailed below with reference to drawings.
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Fig. 1 is an overall structure ofmagnetron 1 in the exemplary embodiment of the present disclosure, andFig. 2 is a bottom view ofmagnetron 1. - As shown in
Fig. 1 andFig. 2 ,magnetron 1 includesmagnetic yoke 2,output unit 3 provided abovemagnetic yoke 2, andfilter 4 provided belowmagnetic yoke 2. -
Magnetic yoke 2houses anode cylinder 5, two annularpermanent magnets anode cylinder 5, and coolingblock 10 disposed aroundanode cylinder 5.Filter 4 includes choke coil (not illustrated) andfeedthrough capacitor 7. - In
Fig. 1 , the vertical direction (axial direction of anode cylinder 5) is the Z direction, and directions orthogonal to the Z direction and also orthogonal to each other are the X direction and Y direction. In the description, the X direction is the right and left direction, the Y direction is the front and back direction, and the Z direction is the top and bottom direction. However, directions are not particularly limited. -
Magnetron 1 in the exemplary embodiment gives an example of setting the Z direction (top and bottom direction) to the axial direction ofanode cylinder 5. However, the axial direction ofanode cylinder 5 may be the left and right direction or the front and back direction. -
Magnetic yoke 2 includesmain body 8a whose pair of opposing side faces and a top face are open, and cover 8b that closes an opening on the top face ofmain body 8a. Annularpermanent magnets anode cylinder 5, and coolingblock 10 are housed incasing 8 ofmagnetic yoke 2. -
Anode cylinder 5 is fixed withcasing 8 ofmagnetic yoke 2 such that it is externally sandwiched by annularpermanent magnets permanent magnet 6B disposed at the bottom inFig. 1 is an input magnet, and annularpermanent magnet 6A disposed on the top is an output magnet. - Anode vanes (not illustrated) inside
anode cylinder 5 are radially disposed. A space surrounded by adjacent anode vanes andanode cylinder 5 forms a cavity resonator. A cathode structure (not illustrated) is disposed at the center ofanode cylinder 5. A space surrounded by this cathode structure and anode vanes is an interaction space. - When
magnetron 1 in the exemplary embodiment is used, required power is applied to the cathode structure to emit thermoelectrons afterinside magnetron 1 is vacuumed, and DC high voltage is applied between the anode vanes and cathode structure. - In the interaction space, annular
permanent magnets anode cylinder 5 face each other. By applying DC high voltage between the anode vanes and cathode structure, electrons released from the cathode structure are led to the anode vanes. - Electrons turn and circulate by the electric field and magnetic field in the interaction space, and reach the anode vanes. Here, energy produced by electron motion is given to the cavity resonator to emit microwaves.
- Next is described a structure of cooling
block 10 inmagnetron 1 in the exemplary embodiment.Fig. 3 is a perspective view of coolingblock 10, andFig. 4 is a perspective view of coolingblock 10 in which a pipe joint and fastener for connecting a cooling liquid pipe are removed.Fig. 5 is a lateral sectional view (XY plane) inside coolingblock 10 inFig. 3 . - Cooling
block 10 has a function of coolinganode cylinder 5 and annularpermanent magnets Fig. 3 and Fig. 4 , coolingblock 10 has a substantially rectangular-parallelepiped outer shape, and is integrally formed with, for example, a metal material with high heat conductivity (e.g., copper and aluminum).Circulation passage 9 for passing cooling liquid is formed inside coolingblock 10. - Cooling
block 10 includes an annular continuous part around an outer peripheral face ofanode cylinder 5, and has an annular shape in which both ends of this annular continuous part face each other in a close distance. In other words, an annular discontinuous part (space S in the exemplary embodiment) exists only on a part of coolingblock 10 when seen from the top (in the Z direction) inFig. 3 . - Inner
peripheral face 11 of coolingblock 10 is formed as an inner peripheral face attachable to an outer peripheral face ofanode cylinder 5. The outer periphery of coolingblock 10 is formed substantially rectangle to be fitted incasing 8 ofmagnetic yoke 2. - Cooling
block 10 makes indirect contact with annularpermanent magnet 6A near innerperipheral face 11 on the top face of coolingblock 10 via other components, and makes indirect contact with annularpermanent magnet 6B near innerperipheral face 11 on the bottom face of coolingblock 10 via other components. In the description below, both ends of the annular continuous part of cooling block are referred to as opposing ends 12a and 12b. - A pair of
pipe joints circulation passage 9 are connected to connectingfaces block 10. - Opposing ends 12a and 12b are positioned between
pipe joints face 13a including opposingend 12a, and pipe joint 14b is connected to connectingface 13b including opposingend 12b. - Pipe joints 14a and 14b include anchoring
bolt 16a and anchoringbolt 16b, connectingnut 17a and connectingnut 17b for detachably connecting a supply pipe/discharge pipe of the cooling liquid, respectively. - By turning connecting nuts 17a and 17b, the supply pipe/discharge pipe can be attached or detached.
Circulation passage 9 in coolingblock 10 is formed from a connecting part of pipe joint 14a to a connecting part of pipe joint 14b via the outer periphery ofanode cylinder 5. - Opposing ends 12a and 12b are disposed on connecting
faces peripheral face 11 of coolingblock 10 to the outer peripheral face of coolingblock 10. - In the exemplary embodiment, connecting
faces face 13a to which pipe joint 14a is connected and connectingface 13b to which pipe joint 14b is connected are provided on substantially the same plane. - Fastener 15 (e.g., anchoring bolt and nut) is engaged with each of opposing ends 12a and 12b, and
fastener 15 is disposed inrecess 13c in connectingface 13b. By tighteningfastener 15 with screw, space S (distance) between opposing ends 12a and 12b can be narrowed. - By narrowing space S between opposing ends 12a and 12b, inner
peripheral face 11 of coolingblock 10 is pushed toward and closely attached to the outer peripheral face ofanode cylinder 5, so as to fasten coolingblock 10 ontoanode cylinder 5. In the exemplary embodiment, space S is set to, for example, about 3 mm before being tightened. - As shown in
Fig. 3 to Fig. 5 ,fastener 15 extends in a direction parallel to a plane (XY plane) including the annular direction (a turning direction of anode cylinder 5) of coolingblock 10.Recess 13c opened to the side is formed in connectingface 13b connected to pipe joint 14b. -
Fastener 15 is inserted insiderecess 13c, andengagement hole 13d andengagement hole 13e that engage with insertedfastener 15 are formed in an inner face of recess 13C (seeFig. 4 ). In a state thatfastener 15 is inserted to and engaged with bothengagement holes Fig. 3 ),fastener 15 is housed insiderecess 13c. - As shown in
Fig. 5 , YZ plane passing center C ofanode cylinder 5 and perpendicular to connectingfaces plane 18. The Y direction that is the flow direction of the cooling liquid at a connecting part (connectingfaces pipe joints circulation passage 9 exists inplane 18. - The flow direction of cooling liquid matches the connecting direction of
pipe joints block 10, the connecting direction of pipes (not illustrated) topipe joints pipe joints block 10 in the exemplary embodiment. - Space S in cooling
block 10 extends in a direction tilted relative to plane 18 perpendicular to connectingfaces - More specifically, space S is tilted by 30° in the annular direction of cooling
block 10 relative to the flow direction (Y direction) of the cooling liquid at the connecting part of pair ofpipe joints - Still more, in the exemplary embodiment, space S extends in a direction passing center C of
anode cylinder 5, and crossesplane 18 at center C. With this layout, space S extends in the normal direction (i.e., radial direction of cooling block 10) perpendicular to the tangential direction of innerperipheral face 11 of coolingblock 10. - Still more, in the exemplary embodiment,
fastener 15 is disposed insiderecess 13c in coolingblock 10 such thatfastener 15 extends in a direction perpendicular to this space S. In other words,fastener 15 passing space S extends in a direction tiled relative to a face perpendicular to the flow direction of the cooling liquid at the connecting part of pair ofpipe joints - As shown in
Fig. 5 , a space for placingfastener 15 in cooling block 10 (space crossing space S) ends at a position not reachingcirculation passage 9 to avoid interference withcirculation passage 9. One end (bolt head) offastener 15 disposed in this space is placed inrecess 13c so that it does not protrude to the XZ plane where connecting faces 13a and 13b are provided. - Next is described tightening of cooling
block 10 andanode cylinder 5 withfastener 15. - When
fastener 15 is disposed inrecess 13c in coolingblock 10 and tightened, space S is narrowed. This fastens the innerperipheral face 11 of coolingblock 10 ontoanode cylinder 5 to anchoranode cylinder 5. In this tightening operation,fastener 15 is simply inserted intorecess 13c and turned, and thus the operation can be implemented without interfering withpipe joints - This workability is effectively achieved, in particular, when space S is tilted relative to plane 18 perpendicular to connecting
faces pipe joints circulation passage 9. - Compared to the case of tightening the fastener from both sides relative to the cooling block, as shown in
Fig. 9 andFig. 10 , a component for closing the fastener, such as a nut, can be omitted. This has an advantage of reducing manufacturing cost. - Compared to the structure shown in
Fig. 9 andFig. 10 , an area of connectingfaces - Furthermore, in the exemplary embodiment, space S extends in the radial direction of
anode cylinder 5 in coolingblock 10.Fastener 15 is disposed in a direction perpendicular to space S (and its extending plane). This layout enables to further uniformly tighten coolingblock 10 andanode cylinder 5 withfastener 15. Coolingblock 10 andanode cylinder 5 can thus be fixed in a further stable state. - In the same way,
fastener 15 extends in a direction parallel to a plane (XY plane) including the annular direction of cooling block 10 (turning direction of anode cylinder 5). This enables to further uniformly and stably tighten coolingblock 10 andanode cylinder 5 in good balance, compared to the case of tiltingfastener 15 relative to the XY plane. - In the exemplary embodiment, connecting
faces block 10. Coolingblock 10 andanode cylinder 5 can be stably fixed in a good balance also whenfastener 15 is tightened to narrow space S. - Description "substantially the same plane" includes cases when relative positions of opposing ends 12a and 12b are deviated due to tightening of
fastener 15, in addition to the case when connecting faces 13a and 13b are on the same plane. - In the magnetron as configured in the exemplary embodiment, space S and
fastener 5 are disposed in a tilted manner, in addition topipe joints fastener 15 disposed on connectingfaces pipe joints fastener 15 even though a structure of disposingfastener 15 between pair ofpipe joints 4a and 14b is adopted. - In addition, an influence of
fastener 15 can be reduced at gaining access topipe joints fastener 15 can be used and tightened in the state pair ofpipe joints block 10 and the cooling liquid pipe is also connected. - In the
state fastener 15 is engaged withcooling block 10, the user can gain access topipe joints bolts pipe joints fastener 15 can be achieved in coolingblock 10. - Since an interference of one of
fastener 15 andpipe joints faces pipe joints block 10 can be more flexibly disposed. - For example, in a structure shown in
Fig. 9 andFig. 10 , the connecting face of pipe joint is set back toward the center of cooling block. However, in the exemplary embodiment, mutual interference at gaining access betweenpipe joints fastener 15 does not need to be considered. - Therefore, when forming
cooling block 10 by cutting out a substantially rectangular-parallelepiped material, for example,pipe joints fastener 15 can be disposed in a layout that can reduce shaved material, compared to the conventional cooling block shown inFig. 9 andFig. 10 . - Accordingly, wasted material in fabrication of cooling
block 10 can be reduced, and also a good access topipe joints fastener 15 can be secured. Less portion to cut can increase the volume of coolingblock 10, and thus cooling performance can be improved. - The present disclosure is described with reference to the above exemplary embodiment. However, the present disclosure is not limited to the aforementioned exemplary embodiment. The above exemplary embodiment refers to the case of leaving a space without completely closing space S when
fastener 15 is tightened. However, the present disclosure is not limited to this structure. Opposing ends 12a and 12b may also mutually contact. - The above exemplary embodiment refers to the case of placing one end of
fastener 15 inrecess 13c, and this one end does not cross the XZ plane where connecting faces 13a and 13b are provided. However, the present disclosure is not limited to this structure, as long as at least a part offastener 15 is placed inrecess 13c. -
Fastener 15 can be placed without being protruded, in particular, from the outer peripheral face of coolingblock 10 when one end offastener 15 is placed in recess 13, as in the exemplary embodiment. This can further suppress, in particular, interference withfastener 15 at gaining access topipe joints pipe joints fastener 15. - The above exemplary embodiment refers to the case of extending space S in the radial direction of
anode cylinder 5. Other than this structure, space S may be extended in a direction different from the radial direction ofanode cylinder 5. - The exemplary embodiment refers to the case of extending
fastener 15 in a direction perpendicular to space S. Other than this structure,fastener 15 may be extended in a direction not perpendicular to space S. - Cooling
block 10 andanode cylinder 5 can be further uniformly tightened when space S is extended in the radial direction ofanode cylinder 5 andfastener 15 is extended in a direction perpendicular to space S, as in the exemplary embodiment. - In the exemplary embodiment, connecting
faces state fastener 15 is not tightened in coolingblock 10. However, the present disclosure is not limited to this structure. For example, as shown inFig. 6 and Fig. 7 , the shape of connectingface 13b whererecess 13c is formed may have an uneven surface (relative to the XZ plane). - Shapes of connecting
faces faces block 10 shown in the exemplary embodiment. Coolingblock 10 in the exemplary embodiment thus offers high flexibility in changing design. - In the exemplary embodiment,
fastener 15 extends in a direction parallel to a plane including the annular direction of coolingblock 10. However, the present disclosure is not limited to this structure. For example, as shown inFig. 8 ,fastener 15 may be extended in a direction tilted relative to a plane including the annular direction of coolingblock 10. - In this case, in particular,
recess 13c protrudes from the top face of coolingblock 10, and thus an area ofrecess 13c in connectingface 13b can be reduced, compared to that in the exemplary embodiment and the embodiment shown inFig. 6 and Fig. 7 . Accordingly, the tightening strength of connectingfaces fastener 15 can be secured. Coolingblock 10 in the exemplary embodiment also offers high flexibility in setting the extending direction offastener 15. - The exemplary embodiment gives an example of cooling
block 10 having a substantially rectangle outer peripheral face. However, coolingblock 10 may also have a polygonal or curved outer peripheral face. - The exemplary embodiment refers to the case of separately forming
pipe joints block 10 and connecting them to cooling block 10 (i.e.,fastener 15 is disposed between the connecting parts of pair ofpipe joints block 10. - The exemplary embodiment refers to the case that pipe joints 14a and 14b have a straight shape with the Y direction in the longer-hand direction. However, the present disclosure is not limited to this structure. A range of shapes (e.g., L shape) are acceptable. Also in other shapes, the flow direction of the cooling liquid at the connecting parts of pair of
pipe joints circulation passage 9 and the longer-hand direction ofpipe joints -
Multiple fasteners 15 may also be used. - A combination of some of exemplary embodiments in the above various exemplary embodiments can achieve the effect of each exemplary embodiment.
- The magnetron in the present disclosure is applicable to magnetron utilization equipment, typically microwave ovens.
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- 1,100 Magnetron
- 2 Magnetic yoke
- 3 Output unit
- 4 Filter
- 5 Anode cylinder
- 6A, 6B Annular permanent magnet
- 7 Feedthrough capacitor
- 8 Casing
- 9, 112 Circulation passage
- 10, 110 Cooling block
- 11 Inner peripheral face
- 12a, 12b Opposing end
- 13a, 13b Connecting face
- 13c Recess
- 13d, 13e Engagement hole
- 14a, 14b, 112A Pipe joint
- 15, 116 Fastener
- 16a, 16b Anchoring bolt
- 17a, 17b Connecting nut
- 18 Plane
Claims (9)
- A magnetron comprising:an anode cylinder;a cooling block that is an integral component having an annular shape with both ends of an annular continuous part facing each other, the cooling block being fastened to an outer peripheral face of the anode cylinder to surround the anode cylinder and having a circulation passage for cooling liquid inside to cool the anode cylinder;a fastener engaged with each of the both ends of the cooling block facing each other to press an inner peripheral face of the cooling block against the outer peripheral face of the anode cylinder by tightening and narrowing a distance between the both ends; anda pair of pipe joints provided on an outer peripheral face of the cooling block and communicated with the circulation passage,whereinthe fastener is disposed between the pair of pipe joints, a discontinuous part between the both ends of the cooling block facing each other extends in a tilted manner in an annular direction of the cooling block relative to a flow direction of the cooling liquid at a connecting part of the pair of pipe joints and the circulation passage, and the fastener passing the discontinuous part extends in a tilted manner relative to a face perpendicular to the flow direction of the cooling liquid at the connecting part of the pair of pipe joints and the circulation passage.
- The magnetron of claim 1, wherein a recess is formed between the pair of pipe joints, and at least a part of the fastener is placed in the recess.
- The magnetron of claim 2, wherein one end of the fastener is placed in the recess.
- The magnetron of claim 1, wherein the fastener extends in a direction perpendicular to the discontinuous part.
- The magnetron of claim 1, wherein the discontinuous part extends along a radial direction of the anode cylinder disposed in the cooling block.
- The magnetron of claim 1, wherein the cooling block has a substantially rectangle outer periphery, and a connecting face is provided on one end of the outer periphery.
- The magnetron of claim 6, wherein the connecting face of the cooling block to which one of the pair of pipe joints is connected is provided on a substantially same plane as the connecting face of the cooling block to which other of the pair of pipe joints is connected.
- The magnetron of claim 1, wherein the fastener extends in a direction parallel to a plane including an annular direction of the cooling block.
- The magnetron of claim 1, wherein the fastener extends in a direction tilted relative to a plane including an annular direction of the cooling block.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015091317A JP6532035B2 (en) | 2015-04-28 | 2015-04-28 | Magnetron |
PCT/JP2016/001581 WO2016174812A1 (en) | 2015-04-28 | 2016-03-18 | Magnetron |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3291278A1 EP3291278A1 (en) | 2018-03-07 |
EP3291278A4 EP3291278A4 (en) | 2018-05-02 |
EP3291278B1 true EP3291278B1 (en) | 2019-05-22 |
Family
ID=57199823
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16786094.9A Active EP3291278B1 (en) | 2015-04-28 | 2016-03-18 | Magnetron |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3291278B1 (en) |
JP (1) | JP6532035B2 (en) |
CN (1) | CN107533939B (en) |
WO (1) | WO2016174812A1 (en) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000285817A (en) * | 1999-03-31 | 2000-10-13 | Matsushita Electronics Industry Corp | Magnetron device |
JP5201711B2 (en) * | 2007-08-08 | 2013-06-05 | パナソニック株式会社 | Magnetron |
CN101630620A (en) * | 2008-07-18 | 2010-01-20 | 麦日照 | Permatron liquid cooling radiator |
JP5497496B2 (en) * | 2010-03-12 | 2014-05-21 | パナソニック株式会社 | Magnetron and microwave equipment |
CN203617243U (en) * | 2013-11-05 | 2014-05-28 | 河南勃达微波设备有限责任公司 | Water-cooling sleeve used for magnetic control pipe |
JP6252897B2 (en) * | 2013-11-07 | 2017-12-27 | パナソニックIpマネジメント株式会社 | Magnetron |
CN104064420B (en) * | 2014-06-09 | 2016-08-24 | 青岛东方循环能源有限公司 | Cooling jacket, the magnetron using cooling jacket and the online replacing options of magnetron |
-
2015
- 2015-04-28 JP JP2015091317A patent/JP6532035B2/en active Active
-
2016
- 2016-03-18 EP EP16786094.9A patent/EP3291278B1/en active Active
- 2016-03-18 WO PCT/JP2016/001581 patent/WO2016174812A1/en active Application Filing
- 2016-03-18 CN CN201680022793.4A patent/CN107533939B/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP3291278A1 (en) | 2018-03-07 |
JP2016207603A (en) | 2016-12-08 |
JP6532035B2 (en) | 2019-06-19 |
WO2016174812A1 (en) | 2016-11-03 |
CN107533939A (en) | 2018-01-02 |
EP3291278A4 (en) | 2018-05-02 |
CN107533939B (en) | 2019-06-11 |
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