`
`CERTIFICATION OF TRANSLATION
`
`
`I, Christopher L. Field, residing at 43 Sherman’s Bridge Rd., Wayland MA, 01778,
`United States of America, declare and state as follows:
`
` I
`
` am well acquainted with the English and Japanese languages. I have in the past
`translated numerous Japanese documents of legal and/or technical content into
`English. I am fully accredited by the American Translators Association for
`Japanese to English translation.
`
`To a copy of this Japanese document I attach an English translation and my
`Certification of Translation. I hereby certify that the English translation of the
`document entitled "H10–238491, Canned Motor Pump” is, to the best of my
`knowledge and ability, an accurate translation.
`
` I
`
` further declare that all statements made herein of my own knowledge are true,
`that all statements made on information and belief are believed to be true, and that
`false statements and the like are punishable by fine and imprisonment, or both,
`under Section 1001 of Title 18 of the United States Code.
`
`Signed,
`
`
`
`
`
`
`
`
`________________________
`Christopher Field
`
`
`
`
`
`June 8, 2017
`
`_______________
`Date
`
`
`
`
`
`
`
`
`
`Am. Honda v. IV II - IPR2018-00443
`PET_HONDA_1003-0001
`
`

`

`
`
`
`
`(19) Japan Patent Office (JP)
`
`(12) Japanese Unexamined Patent
`Application Publication (A)
`
`
`
`
`(11) Japanese Unexamined Patent
`Application Publication Number
`H10–238491
`(43) Publication date: 08 Sep 1998
`
`Theme codes (reference)
`
`Identification codes
`
`(51) Int. Cl.6
`F04FD 13/06
`
` 29/58
`
`
`
`
`
`
`
`(21) Application number
`(22) Date of application
`
`JP H9–42370 A
`26 February 1997
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`(54) [Title of the Invention] Canned Motor Pump
`
`(57) [Abstract]
`[Problem] To provide a canned motor pump in which
`a power unit of an inverter device is cooled efficiently
`and an inverter control unit is subject to almost no
`thermal effect from the power unit.
`[Solving means] A canned motor, comprising a heat
`transfer pipe in which a fluid expelled by a pump unit
`is caused to flow and which is disposed around a stator
`core, and a heat transfer means for putting the heat
`transfer pipe in contact with a heat emitting section
`such as an inverter device.
`
` FI
`F04FD 13/06
`
` 29/58
`
`Request for examination: None Number of claims: Online (Total of 10 pages)
`
`
`
`
`
`E
`H
`A
`
`(71) Applicant
`
`(72) Inventor
`
`(74) Agent
`
`000226242
`Nikkiso Co., Ltd.
`3–43–2 Ebisu, Shibuya-ku, Tokyo-to
`YOSHIAKI KONISHI
`℅ Nikkiso Co., Ltd.
`3–43–2 Ebisu, Shibuya-ku, Tokyo-to
`NAOKI FUKUMURA, Patent attorney
`
`
`
`
`
`Am. Honda v. IV II - IPR2018-00443
`PET_HONDA_1003-0002
`
`

`

`
`
`(2)
`
`JP H10–238491 A
`
`[Claims]
`[Claim 1] A canned motor pump, comprising a heat
`transfer pipe in which a fluid that is suctioned and
`expelled by a pump unit is caused to flow and which is
`disposed around a stator core, and a heat transfer
`means for putting the heat transfer pipe in contact with
`a heat release means or a heat emitting section such as
`an inverter device.
`[Claim 2] The canned motor pump as claimed in 1,
`wherein the heat transfer pipe as claimed in claim 1 is
`connected to an expelling path provided to the pump
`unit as claimed in claim 1 through which liquid is
`expelled.
`[Detailed Description of the Invention]
`[0001]
`the Invention] The present
`[Technical Field of
`invention relates to canned motor pumps, and more
`particularly relates to a canned motor in which heat
`emitting sections of an inverter device can be cooled
`efficiently and no cooling fan is needed to cool the
`inverter device.
`[0002]
`the
`to be Solved by
`[Prior Art and Problems
`Invention] A power unit that controls a motor directly
`and an inverter device that has an inverter control unit
`that controls the power unit are generally used to
`control a motor in a canned motor pump.
`[0003] The power unit and the inverter control unit
`have conventionally been contained in a single control
`panel, and a cooling fan has been provided to the
`control panel with the goal of releasing heat generated
`by the power unit.
`[0004] In this manner, conventional control panels
`have been provided with a power unit, an inverter
`control unit, and a cooling fan, which has resulted in
`the problem of
`large size
`in control panels.
`Furthermore, although cooling fans have, as noted
`above, been provided to the control panels, the
`inverter control unit becomes very hot due to heat
`produced by the power unit. Accordingly, the inverter
`control unit is adversely affected by this heat, creating
`the risk of malfunctioning due to incorrect commands
`being sent to the power unit. Moreover, dust which
`has entered the control panel through the cooling fan
`becomes attached to the power unit and the inverter
`control unit and is heated by the heat from the power
`unit, creating the risk of fire. Another problem has
`been that the cooling fan attached to the control panel
`has been a source of noise.
`[0005] The present invention has as an object to
`provide a canned motor pump in which a power unit
`of an inverter device is cooled efficiently and an
`inverter control unit is subject to almost no thermal
`effect from the power unit
`[0006]
`[Means for Solving the Problems] A canned motor
`pump, the object of which is to solve these problems,
`is (1) a canned motor pump comprising a heat transfer
`pipe in which a fluid that is suctioned and expelled by
`a pump unit is caused to flow and which is disposed
`around a stator core, and a heat transfer means for
`putting the heat transfer pipe in contact with a heat
`
`release means or a heat emitting section such as an
`inverter device, and (2) a canned motor pump as
`claimed in (1), wherein the heat transfer pipe in (1) is
`connected to an expelling path provided to the pump
`unit in (1) through which liquid is expelled.
`[0007]
`[Embodiments of the Invention] Thus, the canned
`motor pump according to the present invention
`comprises a heat transfer pipe in which a fluid that is
`suctioned and expelled by a pump unit is caused to
`flow and which is disposed around a stator core, and a
`heat transfer means for putting the heat transfer pipe in
`contact with a heat release means or a heat emitting
`section such as an inverter device. The canned motor
`pump according to the present invention is described
`below, with reference to embodiments.
`[0008] FIG. 1 is a longitudinal cross-sectional view of
`a canned motor pump cut along a plane including an
`axial line of a shaft of a rotor, showing one example of
`a canned motor pump, being an aspect in which a heat
`emitting unit of an inverter device is mounted on a
`canned motor pump, and a heat transfer pipe and a
`stator core are provided to a stator mold.
`[0009] FIG. 2 is a lateral cross-sectional view showing
`the canned motor pump shown in FIG. 1 cut along a
`plane A–A.
`[0010] In the canned motor pump shown in FIG. 1, a
`stator core 3 has a substantially hollow cylindrical
`shape.
`[0011] A stator can 51 having a substantially hollow
`cylindrical shape is fitted into the stator core 3.
`[0012] As shown in FIG. 2, tooth-like protrusions 31,
`which are protrusions similar to teeth, wider at the tip,
`are formed protruding inward in a central direction on
`an inner face of the stator core 3. Insulated copper
`wiring that forms a stator coil 33 is provided, tightly
`filling spaces 32 formed between adjacent ones of the
`tooth-like protrusions 31, in a direction parallel to the
`tooth-like protrusions 31. An outer circumferential
`face of the stator can 51 penetrates further into the
`spaces 32 than the stator coil 33.
`[0013] A rotor 6 is rotatably provided in the space
`inside the stator can 51. The rotor 6 has a shaft 61. The
`shaft 61 is supported by shaft bearings 62 and 63, and
`an impeller 71 is affixed to a left-side end of the shaft
`61. The space inside the stator can 51 communicates
`with the space inside a pump unit 7 discussed below
`and working fluid flow paths 81 provided inside an
`end unit block 8, also discussed below, via the shaft
`bearings 62 and 63.
`[0014] As shown in FIG. 2, a pair of stainless steel
`heat transfer pipes 1 that have a substantially right
`triangular cross-section are disposed so as to sandwich
`the stator core 3 from above the stator core 3. The pair
`of heat transfer pipes 1 is disposed such that the two
`right-angle sides of the heat transfer pipes 1 face
`outwards from the stator core 3. The sides of the heat
`transfer pipes 1 that face the stator core 3 have an arc-
`shaped
`cross-section
`that
`follows
`the
`outer
`circumferential face of the stator core 3.
`[0015] A stainless steel heat transfer plate 2 is
`mounted to top faces of the heat transfer pipes 1. A
`
`Am. Honda v. IV II - IPR2018-00443
`PET_HONDA_1003-0003
`
`

`

`
`
`(3)
`
`JP H10–238491 A
`
`power unit 41 of the inverter device that controls the
`frequency and voltage of the AC current flowing to
`the stator coil 33 is in contact with the top face of the
`heat transfer plate 2. The power unit 41 has a water-
`proof housing 42 which prevents water from entering.
`An inverter control unit controls ignition timing, etc.,
`of a thyristor provided to the power unit 41 is
`contained inside a control panel that is provided to a
`location away from the canned motor pump and not
`shown in the drawings. The inverter control unit is
`linked to the power unit 41 by wiring that transmits
`various control instructions from the inverter control
`unit to the power unit 41.
`[0016] As shown in FIG. 2, the stator core 3 and the
`heat transfer pipes 1 are molded in place using
`polydicyclopentadiene, which forms a stator molded
`portion 5 that has a substantially square cross-section
`and coats the stator core 3 and the heat transfer pipes
`1. Because the heat transfer plate 2 is, as noted above,
`attached to the top faces of the heat transfer pipes 1,
`these are not covered by the stator molded portion 5
`and therefore exposed. The stator molded portion 5 is
`formed as a single unit with the stator can 51. A pair
`of flow paths 52 that have a substantially right
`triangular cross-section are formed in a lower half of
`the stator molded portion 5, i.e., opposite where the
`heat transfer pipes 1 are sealed, so as to sandwich the
`lower half of the stator core 3. The sides of the flow
`paths 52 that face the stator core 3 have an arc-shaped
`cross-section that follows the outer circumferential
`face of the stator core 3.
`[0017] As shown in FIG. 1, a pump unit 7 that
`suctions and expels a working fluid is provided at one
`end of the stator molded portion 5. The pump unit 7
`has an impeller 71 and a casing 70 that covers the
`impeller 71. One intake path 72, extending in the same
`direction as the axial line of the shaft 61, is provided
`in the casing 70 for suctioning working fluid. In the
`casing 70, one pair of expelling paths 73 that expel the
`working fluid is provided in the upper portion of the
`impeller 71, i.e., in the upper portion of the [part]
`where the power unit 41 is mounted in the canned
`motor pump, and another pair is provided in the lower
`portion of the impeller 71, i.e., in the part opposite to
`where the power unit 41 is mounted in the canned
`motor pump, for a total of two pairs. The pair of
`expelling paths 73 provided in the upper portion of the
`impeller 71 are each connected to the respective ends
`of the heat transfer pipes 1. The pair of expelling paths
`73 provided on the lower portion the impeller 71 are
`each connected to the respective ends of the pair of
`flow paths 52.
`[0018] An end unit block 8 that has an expelling hole
`83 that expels the working fluid to the outside is
`affixed to another end of the stator molded portion 5.
`The working fluid flow paths 81 through which flows
`the working fluid are provided in pairs inside the end
`unit block 8, one pair above and one pair below, for a
`total of two pairs. The two pairs of working fluid flow
`paths 81 merge to form a single unified working fluid
`flow path 82 inside the end unit block 8. A right-side
`end of the working fluid flow path 82 serves as the
`
`expelling hole 83. The heat transfer pipes 1 are
`connected to the pair of working fluid flow paths 81
`provided above in the end unit block 8, and the flow
`paths 52 are connected to the pair of working fluid
`flow paths 81 provided below in the end unit block 8.
`[0019] In the canned motor pump shown in FIG. 1, the
`heat transfer pipes 1 correspond to the heat transfer
`pipes in the canned motor pump of the present
`invention, the heat transfer plate 2 corresponds to the
`heat transfer means in the canned motor pump of the
`present invention, and the stator core 3 corresponds to
`the stator core in the canned motor pump of the
`present invention. The power unit 41 corresponds to
`the heat emitting section of the inverter device in the
`canned motor pump of the present invention. The
`pump unit 7 corresponds to the pump unit in the
`canned motor pump of the present invention.
`[0020] Operation of the canned motor pump shown in
`FIG. 1 is described next.
`[0021] In the canned motor pump in FIG. 1, the
`working fluid flows form the intake path 72 the casing
`7, and is then expelled through the expelling paths 73.
`Inside the pair of expelling paths 73, the working fluid
`expelled from the upper pair of expelling paths 73
`passes through the inside of the heat transfer pipes 1 to
`the right and left, through the pair of working fluid
`flow paths 81 provided above the end unit block 8,
`and is expelled to the outside through the expelling
`hole 83. Heat produced by the power unit 41 is
`transmitted to the heat transfer pipes 1 via the heat
`transfer plate 2 and is removed to the outside by the
`working fluid that passes through the inside of the heat
`transfer pipes 1. Heat produced by the stator core 3
`and the stator coil 33 is also removed to the outside by
`the working fluid that passes through the inside of the
`heat transfer pipes 1.
`[0022] On the other hand, working fluid that is
`expelled by through the pair of expelling paths 73
`below passes through the flow paths 52 formed inside
`the stator molded portion 5, through the pair of
`working fluid flow paths 81 provided below in the end
`unit block 8, and is expelled to the outside through the
`expelling hole 83. Heat produced by the stator core 3
`and the stator coil 33, too, is removed to the outside by
`the working fluid that passes through the flow paths
`52.
`[0023] Elements of the canned motor pump according
`to the present invention are described in detail next.
`[0024] In the canned motor pump of the present
`invention, the heat transfer pipes are disposed around
`the stator core. The heat transfer pipes are in contact
`with the heat transfer means that transfers heat from
`the heat emitting sections or heat release means
`provided to the inverter device. The working fluid that
`is suctioned and expelled by the pump unit in the
`canned motor pump of the present invention passes
`through the inside of the heat transfer pipes.
`[0025] The heat transfer pipes may also be disposed
`around the stator core. Accordingly, the heat transfer
`pipes may simply be in linear or planar contact with
`the surrounding surfaces of the stator core, or the heat
`transfer pipes may be affixed to the surrounding
`
`Am. Honda v. IV II - IPR2018-00443
`PET_HONDA_1003-0004
`
`

`

`
`
`(4)
`
`JP H10–238491 A
`
`surfaces of the stator core by being screwed on, pinned
`on, adhered on, melted on, welded on, brazed on, or
`by any other means.
`[0026] If the stator core has an outer covering, the heat
`transfer pipes may be disposed so as to be in planar or
`linear contact with this outer covering. Stator cores
`having outer coverings include, for example, stator
`cores sealed with synthetic resin, stator cores in which
`a substantially cylindrical stator molded portion that
`covers the stator core is formed therearound, and
`stator cores that have a metal or synthetic resin outer
`covering.
`[0027] The heat transfer pipes may also be disposed
`close to the surrounding surfaces of the stator core.
`Aspects of the present invention in which the heat
`transfer pipes
`is disposed near
`the surrounding
`surfaces of the stator core include, for example,
`aspects in which the heat transfer pipes are disposed
`such
`that
`the distance between
`the surrounding
`surfaces of the stator core and the surrounding
`surfaces of the heat transfer pipes is no less than 1 to
`20 mm. Another possible aspect is one in which if the
`stator core has an outer covering the heat transfer
`pipes are disposed such that the distance between the
`surrounding surfaces of the outer covering of the stator
`core and the surrounding surfaces of the heat transfer
`pipes is no less than 1 to 20 mm.
`[0028] Additionally, as noted above, an embodiment
`is also preferred in which the heat transfer pipes and
`the stator core are sealed with a synthetic resin with
`the heat transfer pipes disposed near the surrounding
`surfaces of the stator core, thereby embedding the heat
`transfer pipes inside the stator molded portion. In that
`embodiment, however, it is preferable for the faces or
`ridges of the heat transfer pipes in contact with the
`heat transfer means to be exposed to the surface of the
`stator molded portion.
`[0029] Another aspect that is preferable is one in
`which the stator core, the heat transfer pipes, and the
`heat transfer means are sealed, and the heat transfer
`pipes and the heat transfer means are embedded inside
`the stator mold. In this aspect, it is preferable for the
`faces of the heat transfer means with which the heat
`emitting sections or heat release means of the invert
`device are in contact to be exposed to the surface of
`the stator mold.
`[0030] Examples of the synthetic resin which can be
`used to seal the stator core, etc., include various types
`of synthetic resins, such as heat-curing resins and
`thermoplastic resins.
`[0031] Examples of thermoplastic resins include
`polyphenylene
`sulfide,
`syndiotactic polystyrene,
`isotactic polystyrene, polyketone, polyether ketone,
`polyether ether ketone, polysuphone, polyether
`sulphone, aromatic polyester, polyamide imide, and
`other thermoplastic engineering plastics. Examples of
`heat-curing resins include epoxy resin, phenol resin,
`silicon resin, and polyimide, etc.
`[0032] Also preferably used are synthetic resins
`obtained by curing a reactive base solution containing
`one or more components selected from the group
`
`consisting of monomers, oligomers, polymer catalysts,
`and catalytic aids.
`[0033] Examples of reactive base solutions include
`reactive base solutions used in ordinary reactive
`injection molding (“RIM”). Specifically, this includes
`examples of combinations of reactive base solutions
`used in polydicyclopentadiene RIM, combinations of
`reactive base solutions used
`in polyester RIM,
`combinations of reactive base solutions used in epoxy
`RIM, combinations of reactive base solutions used in
`nylon RIM, combinations of reactive base solutions
`used in polyurethane RIM, and so on.
`[0034] Of these reactive base solutions, combinations
`of
`reactive
`base
`solutions
`used
`in
`polydicyclopentadiene RIM are the most preferable.
`This is because polydicyclopentadiene has tensile
`strength and rigidity on par with metal, and therefore
`there are no strength-related problems when it is used
`to form a can having a thickness of 0.5 to 1.5 mm, and
`polydicyclopentadiene becomes
`tougher as
`it
`is
`heated. The reason polydicyclopentadiene becomes
`tougher as it is heated is thought to be because heat
`causes cross-linking occurs in double-bonds of the
`polydicyclopentadiene molecule.
`[0035] Examples of combinations of reactive base
`solutions that produce polydicyclopentadiene include
`a combination of a reactive base solution that contains
`dicyclopentadiene and a metal catalyst and a reactive
`base solution that contains dicyclopentadiene and an
`activating agent such as trialkyl aluminum.
`[0036] These
`synthetic
`resins may be used
`independently
`to seal
`the stator core, etc., or
`compounds in which glass fibers, ceramic fibers, talc,
`or other fillers are added to the synthetic resins may be
`used.
`[0037] Examples of methods used in sealing the stator
`core, etc., include RIM, resin transfer molding,
`reactive molding, casting molding, injection molding,
`and so on. Of these methods, reactive injection
`molding is particularly preferable, since only little
`force is required to close the mold, and the method is
`suitable to molding large, complex shapes like the
`stators of canned motor pumps. And in terms of
`obtaining
`a
`high-strength
`stator
`mold,
`polydicyclopentadiene RIM, in which RIM is done
`using
`a
`reactive
`base
`solution
`containing
`dicyclopentadiene as a monomer component is most
`preferable.
`[0038] When sealing as described above, the stator
`can, which is a substantially hollow cylindrical
`member inserted into the cavity in the stator core, can
`also form a single unit with the stator mold. Further, it
`is also possible to seal the stator core, etc., using the
`synthetic resin with a metal, synthetic resin, or fiber-
`reinforced resin stator can which has been pre-formed
`inserted into the stator core.
`[0039] There is no particular limitation to the cross-
`sectional shape of
`the heat
`transfer pipes, but
`examples of possible cross-sectional shapes include
`triangular, tetragonal, pentagonal, hexagonal, and
`other polygonal shapes, circular, fan-shaped, arc-
`shaped, and other shapes. Of these shapes, triangular
`
`Am. Honda v. IV II - IPR2018-00443
`PET_HONDA_1003-0005
`
`

`

`
`
`(5)
`
`JP H10–238491 A
`
`shapes, especially the substantially right triangular
`shapes like those shown in FIGs. 1 and 2, and circular
`shapes are preferable. The
`substantially
`right
`triangular shapes are particularly preferable because
`they ensure a large heat transfer surface between
`themselves and the heat transfer means described
`below.
`[0040] There is no particular limitation on the
`materials used in the heat transfer pipes. Materials
`such as stainless steel, aluminum alloys, corrosion-
`resistant aluminum alloys, titanium, copper, bronze,
`brass, nickel silver, nickel alloy, and other metal
`materials; alumina, boron nitride, silicon carbide,
`silicon nitride, and other ceramics; synthetic resins;
`fiber-reinforced resins reinforced with glass fibers or
`carbon fibers, etc.; and so on can be used. Of these
`materials, metal materials are preferable for their high
`thermal conductivity. When forming the stator molded
`portion using RIM, it is possible to mold the heat
`transfer pipes at the same time.
`[0041] There is no particular limitation on the heat
`transfer means as long as it can transfer heat from the
`heat emitting sections or heat release means of the
`inverter device to the heat transfer pipes by being in
`contact with the heat transfer pipes.
`[0042] One example of the heat transfer means is the
`heat transfer plate shown in FIGs. 1 and 2. The heat
`transfer plate may have one or more fins on one or
`both sides. Materials used in the heat transfer plate
`may
`include materials such as stainless steel,
`aluminum alloys, corrosion-resistant aluminum alloys,
`titanium, copper, bronze, brass, nickel silver, nickel
`alloy, and other metal materials; alumina, boron
`nitride, silicon carbide, silicon nitride, and other
`ceramics; synthetic resins; fiber-reinforced resins
`reinforced with glass fibers, carbon fibers, ceramic
`fibers, etc.; and so on. Of these materials, metal
`materials are preferable for
`their high
`thermal
`conductivity.
`[0043] Examples of aspects in which the heat transfer
`pipes are in contact with the heat transfer plate include
`an aspect in which one side of the heat transfer plate is
`in contact with one side of heat transfer pipes having a
`circular cross-section, an aspect in which one side of
`the heat transfer plate is in contact with ridges on a
`side face of heat transfer pipes having a polygonal
`cross-section, an aspect in which one side of the heat
`transfer plate is in contact with one or more sides of
`heat transfer pipes having a polygonal cross-sections,
`and an aspect in which side faces of the heat transfer
`pipes are fitted into grooves in the heat transfer plates.
`Furthermore, other aspects in which the heat transfer
`pipes are in contact with the heat transfer plate include
`an aspect in which the heat transfer plate has
`protrusion, the heat transfer pipes have recesses into
`which the protrusion fit, and the protrusions are fitted
`into the recesses; an aspect in which side faces of the
`heat transfer pipes have protrusions, the heat transfer
`plate has recesses corresponding to the protrusions,
`and the protrusions are fitted into the recesses; and so
`on. There is no particular limitation on the shapes of
`the protrusions and the recesses in these aspects. The
`
`protrusions may be pointed projections or continuous
`or discrete ridges. If the protrusions are ridges, the
`recesses are preferably grooves into which they fit. If
`the heat transfer pipes and the heat transfer plate are
`put into planar contact, the protrusions can be
`provided to one contact face between the heat transfer
`pipes and the heat transfer plate and the recesses can
`be provided to the other.
`[0044] Aspects in which the heat transfer pipes are in
`contact with the heat transfer plate also include an
`aspect in which the heat transfer plate forms a single
`unit with the heat transfer pipes. An example of an
`aspect in which the heat transfer plate forms a single
`unit with the heat transfer pipes is an aspect in which
`part of the heat transfer plate doubles as part of the
`heat transfer pipes. Such an aspect includes aspects in
`which the heat transfer plate and the heat transfer
`pipes are formed as a single unit using extrusion
`molding, etc., of an aluminum alloy; an aspect in
`which a top end of a metal plate bent into a V-shape or
`a U-shape is brazed onto one surface of the heat
`transfer plate to form the heat transfer pipes; and so
`on. If a heat transfer plate having fins on one or both
`sides is used as the heat transfer means, an aspect in
`which the heat transfer pipes pass through the fins is
`also included in aspects of the present invention in
`which the heat transfer pipes are in contact with the
`heat transfer means.
`[0045] Aside from the heat transfer plate described
`above, heat transfer means are also included in which
`one or more of the heat transfer pipes double as the
`heat transfer means. One example of this type of heat
`transfer means is an aspect of the canned motor pump
`in which a pair of heat transfer pipes having triangular
`cross-sections are disposed adjacent to each other,
`wherein the surfaces other than those facing the stator
`core act as the heat transfer means.
`[0046] If the heat transfer pipes and the heat transfer
`plate are formed separately, the heat transfer pipes and
`the heat transfer means may be removably attached to
`each other or irremovably affixed to each other.
`[0047] Examples of methods for removably attaching
`the heat transfer pipes and the heat transfer means
`include a method in which the heat transfer pipes and
`the heat transfer means are affixed to each other by
`screws; a method in which protrusions are provided to
`one contact surface between the heat transfer pipes
`and the heat transfer plate and recesses to the other,
`and the heat transfer pipes and the heat transfer means
`are joined together by fitting the protrusions into the
`recesses; a method in which the heat transfer pipes is
`magnetically affixed to the heat transfer means; and so
`on. One of these methods can be used alone or two or
`more can be used in combination.
`[0048] Examples of means for affixing the heat
`transfer pipes and the heat transfer means to each
`other include screwing, pinning, adhering, melting,
`welding, brazing, and so on.
`[0049] The working fluid flows through the inside of
`the heat transfer pipes. Accordingly, the heat transfer
`pipes are preferably connected to the intake path
`through which the working fluid is suctioned and the
`
`Am. Honda v. IV II - IPR2018-00443
`PET_HONDA_1003-0006
`
`

`

`
`
`(6)
`
`JP H10–238491 A
`
`expelling path through which the working fluid is
`expelled, each provided to the pump unit. It is
`particularly preferable for them to be connected to the
`expelling path from the standpoint of pump efficiency.
`[0050] In the present invention, the inverter device has
`a power unit and an inverter control unit. Heat
`emitting sections of the inverter device include
`sections of the inverter device where a great deal of
`heat is produced, one specific example of which is the
`power unit. The heat emitting sections of the inverter
`device may be sealed into an airtight container, and
`also sealed using an epoxy resin or the like. The heat
`emitting section of the inverter device may have a heat
`release means such as fins, etc. If the heat emitting
`sections of the inverter device are sealed into an
`airtight container, the heat release means may form
`part of the airtight container.
`[0051] Aspects of the present invention in which the
`heat transfer means is caused to be in contact with the
`heat emitting sections or heat release means of the
`inverter device include an aspect in which the power
`unit is attached directly to the heat release means; an
`aspect in which the power unit is attached to a metal
`chassis and the chassis is attached to the heat transfer
`means; an aspect in which the power unit is mounted
`on a platform having heat release fins and the platform
`is attached to the heat transfer means; and so on.
`[0052] Attaching the heat emitting sections or heat
`release section of the inverter device removably to the
`heat transfer means is preferable from the standpoint
`of inspecting or replacing the heat emitting sections of
`the inverter device. Methods for removably attaching
`the heat emitting sections or heat release section of the
`inverter device removably to the heat transfer means
`include screwing, etc.
`[0053] Other embodiments of the canned motor pump
`according to the present invention are described next.
`[0054] FIG. 3 is a cross-sectional view showing an
`example of lateral cross-section of the canned motor
`pump shown in FIG. 1 cut along a plane A–A in FIG.
`1, in which part of the heat transfer plate 2 is part of
`the heat transfer pipes 1.
`[0055] In the canned motor pump shown in FIG. 3, the
`stator core 3 and the stator molded portion 5 have the
`same structure as in the canned motor pump in FIG. 1.
`The canned motor pump shown in FIG. 3 is the same
`as the canned motor pump in FIG. 1 in terms also of
`the power unit 41 of the inverter device being attached
`to the top of the heat transfer plate 2. The two are also
`the same in that the pump unit 7, which is not shown
`in FIG. 3, is provided to one end of the stator molded
`portion 5, and the end unit block 8, which is not
`shown in FIG. 3, is provided to another end of the
`stator molded portion 5, and in that the pair of heat
`transfer pipes 1 having
`the substantially
`right
`triangular cross-section are disposed to a position
`sandwiching the top half of the stator core 3 and are
`embedded inside the stator molded portion 5.
`[0056] However, in the canned motor pump of FIG. 3,
`part of the heat transfer plate 2 forms part of the heat
`transfer pipes 1, the heat transfer pipes 1 and the heat
`transfer plate 2 thereby forming a single unit. V-
`
`shaped members 11, in which a stainless steel plate
`has been bent into a substantially V-shape, are affixed
`to a bottom face of the stainless steel heat transfer
`plate 2. A top end portion of the V-shaped members
`11 forms horizontal surfaces that are bent inwards.
`The V-shaped members 11 are affixed to the heat
`transfer plate 2 by the horizontal surfaces.
`[0057] In the canned motor pump shown in FIG. 3, the
`heat transfer pipes 1 correspond to the heat transfer
`pipes in the canned motor pump of the present
`invention, the heat transfer plate 2 corresponds to the
`heat transfer means in the canned motor pump of the
`present invention, and the stator core 3 corresponds to
`the stator core in the canned motor pump of the
`present invention. The power unit 41 corresponds to
`the heat emitting section of the inverter device in the
`canned motor pump of the present invention. The
`pump unit 7 corresponds to the pump unit in the
`canned motor pump of the present invention.
`[0058] FIG. 4 is a cross-sectional view showing an
`example of lateral cross-section of the canned