Sealed pump and cooling device provided with same

Abstract

The invention provides a sealed pump and a cooling device provided with the sealed pump, which can inhibit unnecessary load from being applied to a substrate and can stably clamp a bobbin housing through the load of a main body housing abutting part by studying the arrangement of a main body housing abutting part, a coil housing abutting part and the substrate, and a cooling device provided with the sealed pump. A sealed pump (100-1) is provided with: a rotor assembly (10) and a stator assembly (50) that are attachable and detachable in the direction of an axis (L); and a substrate deformation suppression unit in which the bobbin case (62) is sandwiched between the main body case (30) and the coil case (90) in the direction of the axis (L), the substrate deformation suppression unit being configured such that the main body case contact section (62a1a) is positioned on one side surface of the bobbin case main body (62a) on the outside in the radial direction of the main body insertion hole (62a1h), and the main body case contact section (62a1a) is positioned on the other side surface of the bobbin case main body (62a) on the outside in the radial direction of the main body insertion hole (62a1h). The main body housing contact section (62a1a), the coil housing contact section (62bb), and the substrate (70) are arranged in this order from one side toward the other side in the direction of the axis (L).

Description

Technical Field

[0001] The present invention relates to a sealed pump having a coil housing and a cooling device including the sealed pump. Background Art

[0002] In Patent Document 1, as Figure 13 shown, a sealed pump 1300 (hereinafter referred to as "conventional sealed pump") is described. An impeller member 1321 having a rotor magnet 1322 capable of rotating about an axis L includes: a rotor assembly 1310 housed in a main body housing 1330; and a stator assembly 1350 having a stator 1360 and a substrate 1370 connected to the stator 1360. The rotor assembly 1310 and the stator assembly 1350 can be disassembled and assembled with each other. Among them, a coil 1363 is wound around a bobbin housing 1362 that covers a part of a stator core 1361 in the stator 1360.

[0003] In the conventional sealed pump 1300, in a state where the rotor assembly 1310 is removed from the stator assembly 1350, in order to prevent physical contact and attachment of foreign matters such as dust to the coil 1363, a coil cover 1380 and a coil housing 1390 are respectively fixed to one side (the upper side in the figure) and the other side (the lower side in the figure) of the bobbin housing 1362 so as to cover the coil 1363.

[0004] Among them, although illustration and description are omitted in Patent Document 1, in the conventional sealed pump 1300, as Figure 14 in (a) and Figure 14 in (b) shown, when assembling the stator assembly 1350, first, a coil housing abutting portion 1362bb of a support portion 1362b provided at each corner of the stator 1360 is placed on a bobbin housing receiving portion 1390c provided at each corner of the bottom portion 1390a and the side portion 1390b of the coil housing (refer to Figure 13 ). After that, the coil cover 1380 is placed so as to cover the stator 1360 and one end side of the bobbin housing 1362.

[0005] Next, as Figure 13 shown, when assembling the rotor assembly 1310 to the stator assembly 1350, a rotor magnet receiving portion 1332c of the main body housing 1330 and the other end portion 1362a of the bobbin housing 1362 having an L-shaped cross-sectional shape that serves as a main body housing abutting portion (refer to Figure 13 and Figure 14abuts directly against the lattice pattern in (b). Then, by rotating the rotor assembly 1310 relative to the stator assembly 1350 about the axis L, a load F13 is generated in the direction toward the other side of the axis L via the connecting unit 1305, and the blade storage portion 1332b of the main body housing 1330 is connected to the coil cover 1380.

[0006] Therefore, in the existing seal pump 1300, the other end portion 1362a of the spool housing 1362 (refer to Figure 13 and Figure 14 the lattice pattern in (b)) abuts directly against the substrate 1370. Thus, in the assembled state of the rotor assembly 1310 and the stator assembly 1350, the load F13 toward the other side in the direction of the axis L is directly loaded on the substrate 1370. In addition, the arm length of the load F13 (the radial length from the other end portion 1362a of the spool housing 1362 to the spool housing receiving portion 1390c) L13 is relatively large, so a relatively large bending moment acts on the spool housing 1362, that is, on the substrate 1370.

[0007] As a result, in the existing seal pump 1300, there may be breakage of the substrate 1370 itself, solder cracking of the pin 1364 that fixes the substrate 1370 to the spool housing 1362, etc. (hereinafter referred to as "existing problem point 1 (substrate breakage due to large bending moment)").

[0008] In addition, in the existing seal pump 1300, the spool housing 1362 is clamped between the main body housing 1330 and the coil housing 1390 in the direction of the axis L via the main body housing abutting portion 1362a and the coil housing abutting portion 1362bb by the load F13. However, in the spool housing 1362, in the direction opposite to the direction of the load F13 (from one side to the other side in the direction of the axis L), the main body housing abutting portion 1362a and the coil housing abutting portion 1362bb are arranged in sequence. Therefore, the load F13 does not act directly on the coil housing abutting portion 1362bb, but acts on the coil housing abutting portion 1362bb after being converted into other non-preferred forms of force (bending force, tensile force, etc.).

[0009] As a result, in the existing seal pump 1300, due to the dissipation of the load F13, it may not be possible to stably clamp the spool housing 1362 between the main body housing 1330 and the coil housing 1390 in the direction of the axis L (hereinafter referred to as "existing problem point 2 (unstable clamping due to load dissipation)").

[0010] In addition, the spool housing 1362 is finally fastened and fixed between the main body housing 1330 and the coil housing 1390 via the fastening member 1308. However, in order to counteract other forms of forces acting on the spool housing 1362 that are not preferred, an excessive fastening force that may not be necessary may be required for the fastening member 1308. Therefore, even when the rotor assembly 1310 and the stator assembly 1350 are fastened and fixed to each other using the fastening member 1308, the existing problem point 1 (substrate breakage due to a large bending moment) and the existing problem point 2 (clamping instability due to load dissipation) cannot be fundamentally eliminated.

[0011] Prior Art Documents

[0012] Patent Documents

[0013] Patent Document 1: Japanese Patent Application Laid-Open No. 2017-125488 Summary of the Invention

[0014] Problems to be Solved by the Invention

[0015] An object of the present invention is to provide a hermetic pump and a cooling device including the hermetic pump, which can suppress unnecessary loads applied to a substrate by studying the arrangements of a main body housing abutting portion, a coil housing abutting portion, and a substrate, and can stably clamp a spool housing via a load applied through the main body housing abutting portion.

[0016] Means for Solving the Problems

[0017] In order to solve the above-mentioned problems, a sealed pump is provided, comprising: a rotor assembly, which comprises: a rotor, which sets a rotor magnet on an impeller component and rotates around an axis; and a main body shell, which accommodates the rotor; a stator assembly, which comprises: a stator, which winds a coil on a stator core via a bobbin shell; a substrate, which is fixed to the other side of the bobbin shell; and a coil shell, which is arranged on the other side of the substrate and protects the coil; and a substrate deformation suppression unit, which suppresses deformation of the substrate caused by a load along the axis (L) direction in an assembled state in which the rotor assembly can be detached in the axial direction and the stator assembly has the rotor magnet arranged on the radial inner side of the stator, and the bobbin shell The shell comprises: a bobbin shell body, which is respectively provided with a main body insertion hole for inserting the main body shell, and a main body shell abutment portion which directly abuts against the main body shell in the axial direction; and a support portion, which is provided with a coil shell abutment portion supported on the coil shell, and the bobbin shell is clamped between the main body shell and the coil shell in the axial direction via the main body shell abutment portion and the coil shell abutment portion, and with respect to the substrate deformation suppression unit, the main body shell abutment portion is located on a side surface of the bobbin shell body on the radial outside of the main body insertion hole, and is arranged in the order of the main body shell abutment portion, the coil shell abutment portion, and the substrate from one side toward the other side in the axial direction.

[0018] In addition, in the above-mentioned sealed pump, the bobbin shell body may also have: a first wall portion, which defines the body insertion hole; a second wall portion, which surrounds the coil from the outer peripheral side; and a body portion, which connects the first wall portion and the second wall portion and is wound with the coil. As for the substrate deformation suppression unit, the body shell abutment portion is composed of at least one of the first wall portion and the second wall portion that form a double concentric circle centered on the axis.

[0019] In addition, in the above-mentioned sealed pump, with respect to the substrate deformation suppression unit, when the rotor assembly and the stator assembly are assembled, the stator core built into the bobbin shell body is located on a line of force from the main body shell abutment portion toward the other side under load.

[0020] In addition, in the above-mentioned sealed pump, a connector for a power supply terminal for supplying power to the substrate may be connected to the other side of the substrate, the coil shell may have another side portion of the coil shell covering at least a portion of the other side of the substrate, and a connector insertion hole may be formed on the other side portion of the coil shell. As for the substrate deformation suppression unit, when the connector is inserted into the connector insertion hole, the other end portion of the connector will not protrude to the outside from the other side portion of the coil shell.

[0021] In addition, in the above-described sealed pump, it may also be provided with a substrate cooling unit that cools the substrate by passing air therethrough. The substrate is suspended on the other side of the spool housing. The coil housing has another side portion of the coil housing that covers at least a part of the other side of the substrate, and a side portion of the coil housing erected from the periphery of the other side portion of the coil housing. There is a coil other-side space defined by the first wall portion, the second wall portion, the substrate, and the coil, and a substrate accommodation space defined by the substrate and the coil housing. The substrate cooling unit is provided with an air vent communicating with the substrate accommodation space in at least one of the other side portion of the coil housing and the side portion of the coil housing, and an air vent unit communicating in the radial direction is provided between the other sides of the first wall portion and the second wall portion and the substrate, so that the coil other-side space and the substrate accommodation space are always in communication.

[0022] In addition, in the above-described sealed pump, it may also be that the air vent unit has a plurality of wall slits penetrating in the radial direction at the other end portions of the first wall portion and the second wall portion.

[0023] In addition, in the above-described sealed pump, it may also be that the air vent unit has a separation slit formed by separating the other side surface of either the first wall portion or the second wall portion from the substrate.

[0024] In addition, in the above-described sealed pump, it may also be that the spool housing main body is provided on the outer side in the radial direction of the second wall portion, and the other side surface has a plurality of protruding portions that directly abut against the substrate in the axial direction. The air vent unit has a plurality of wall slits penetrating in the radial direction at the other end portions of the protruding portions, and separation slits are respectively formed by separating the other side surfaces of the first wall portion and the second wall portion from the substrate.

[0025] In addition, it may also be a cooling device including the above-described sealed pump.

[0026] Advantageous Effects of the Invention

[0027] According to the present invention, it is possible to provide a sealed pump and a cooling device including the sealed pump that can suppress unnecessary loads applied to the substrate by studying the configurations of the main body housing abutting portion, the coil housing abutting portion, and the substrate, and can stably hold the spool housing by the load via the main body housing abutting portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A longitudinal sectional view of the sealed pump according to the present embodiment ( Figure 3 sectional view taken along line I-I shown).

[0029] Figure 2 Another longitudinal sectional view of the sealed pump according to this embodiment( Figure 3 The sectional view taken along the line II-II as shown).

[0030] Figure 3 Indicates Figure 1 And Figure 2 The top view of the sealed pump as shown.

[0031] Figure 4 Indicates Figure 3 The exploded perspective view from above of the sealed pump as shown.

[0032] Figure 5 Indicates Figure 3 The exploded perspective view from below of the sealed pump as shown.

[0033] Figure 6 The top view of the coil cover according to this embodiment.

[0034] Figure 7 Is an explanatory view of the stator according to this embodiment, (a) represents the top view, and (b) represents the sectional view taken along the line VIIb-VIIb as shown in (a).

[0035] Figure 8 Indicates Figure 4 And Figure 5 The perspective view from above of the assembled stator assembly as shown.

[0036] Figure 9 Is an explanatory view of the assembly process of the rotor assembly and the stator assembly according to this embodiment. (a) represents the sectional view of the rotor assembly and the stator assembly (corresponding to the sectional view taken along the line IXa-IXa as shown in (b)), and (b) represents the top view of the stator assembly as shown in (a).

[0037] Figure 10 Is a schematic diagram for explaining the load borne by the spool housing after the rotor assembly and the stator assembly are assembled. (a) represents the figure corresponding to Figure 9 And (b) represents an example of the main housing abutting portion included in this embodiment.

[0038] Figure 11 Is an explanatory view of the modes that the ventilation unit can take (corresponding to Figure 10 ). (a) represents the deformation example (1) of the ventilation unit, and (b) represents the deformation example (2) of the ventilation unit.

[0039] Figure 12 Is an explanatory view of another mode that the ventilation unit can take. (a) represents the deformation example (3) of the ventilation unit (corresponding to Figure 10 ), and (b) represents the bottom view of the stator as shown in (a).

[0040] Figure 13 Cross-sectional view of a sealed pump representing the prior art.

[0041] Figure 14 Is composed of Figure 13 Top view of the components that make up the stator assembly shown in (a) represents the coil housing and (b) represents the stator. Detailed implementation mode

[0042] With reference to Figures 1 to 12 The implementation modes of the present invention will be described in detail. However, the present invention is not limited to the modes of this implementation mode. In the following sealed pump, the case of using a centrifugal impeller is described, but the form of this impeller is just an example. For example, other forms of impellers such as a cascade impeller can be used.

[0043] <Regarding terms>

[0044] In the descriptions of this specification and the claims, "left", "right", "up", and "down" represent Figures 1 to 2 , Figure 7 Of (b), Figure 9 Of (a), Figures 10 to 11 , Figure 12 The directions shown in (a) of. In the descriptions of this specification and the claims, "one end" and "the other end" represent "the upper end" and "the lower end" in the drawings. In the descriptions of this specification and the claims, "one side" and "the other side" represent "the upper side" and "the lower side" in the drawings. In the descriptions of this specification and the claims, the "main body housing abutting portion" is not limited to the first wall portion and the second wall portion in the spool housing. For example, it can be one side surface of the spool housing main body located outside the radial direction of the main body insertion hole. In the descriptions of this specification and the claims, the "substrate abutting portion" is not limited to the first wall portion and the second wall portion in the spool housing. For example, it can also be a protruding portion extending to the other side in the axial direction outside the radial direction of the second wall portion. In the descriptions of this specification and the claims, the "arm length of the load" represents "the radial length from the inner end of the spool housing receiving portion to the inner end of the main body housing abutting portion as observed in the axial direction".

[0045] (This implementation mode)

[0046] <Regarding the structure of the sealed pump>

[0047] Use Figures 1 to 7 , the sealed pump 100 of this implementation mode will be described. As Figure 9As shown, the hermetic pump 100 mainly consists of a rotor assembly 10, a stator assembly 50, and a bracket 5. Among them, the rotor assembly 10 and the stator assembly 50 can be disassembled and assembled in the axial direction of the axis L. Hereinafter, the structures of the hermetic pump 100 will be described in sequence.

[0048] <Regarding the rotor assembly>

[0049] First, as Figures 1 to 5 shown, the rotor assembly 10 mainly consists of a rotor 20, a main body housing 30, a shaft fixing member 41, a fixed shaft 42, and a vane housing 43. Hereinafter, the structures of the rotor assembly 10 will be described in sequence.

[0050] Among them, in the hermetic pump 100-1 of the present embodiment, as Figure 10 shown in (b), a substrate deformation suppression unit is adopted to make the arm length L1 of the load F10 borne by the main body housing abutting portion 62a1a relatively small, and the load F10 can be transmitted from the main body housing abutting portion 62a1a in the spool housing 62-1 to the coil housing abutting portion 62bb reliably without passing through the substrate 70, and also without being converted into other non-preferred forces (bending force, tensile force, etc.) as much as possible. The details will be described later. Thus, the existing problem point 1 (substrate breakage due to large bending moment) and the existing problem point 2 (unstable clamping due to load dissipation) can be eliminated simultaneously, and the reliability can be improved. In addition, in the hermetic pump 100 of the present embodiment, in order to make the substrate deformation suppression unit more reliable, by adopting the substrate deformation suppression unit (1) (double concentric main body housing abutting portion), the substrate deformation suppression unit (2) (stator core on the acting force line), and the substrate deformation suppression unit (3) (preventing interference at the other end of the connector), the concern 1 (influence of small abutting area), the concern 2 (low rigidity on the acting force line), and the concern 3 (substrate deformation caused by the connector) can be eliminated. Moreover, in the hermetic pump 100 of the present embodiment, by adopting the substrate cooling unit (stable ventilation path passing through the cooling object in the radial direction), the concern 4 (insufficient cooling of the substrate) can be eliminated.

[0051] <Regarding the rotor>

[0052] As Figure 1 shown, the rotor 20 includes an impeller member 21 and a rotor magnet 22.

[0053] The impeller member 21 includes a circular tubular bearing portion 21a, a base end portion 21b forming the other side of the bearing portion 21a, a diameter-expanded portion 21c forming the center of the bearing portion 21a and extending from the base end portion 21b in the outer peripheral direction, a suction vane portion 21d forming one side of the bearing portion 21a and extending in one side direction, and an outer vane portion 21e continuous with the suction vane portion 21d and extending in the outer peripheral direction.

[0054] In addition, the number of blades of the impeller component 21 in this embodiment is 8, but it is not limited thereto, and can be selected according to the use of the seal pump 100 and the required pump capacity.

[0055] The rotor magnet 22 is composed of an annular permanent magnet and is fixed to the other side of the enlarged diameter portion 21c and the outer peripheral surface of the base end portion 21b in the impeller component 21 via an anti-disengagement member 7 (for example, a C-ring, etc.). Thus, the impeller component 21 is configured to be able to rotate together with the rotor magnet 22 around the axis L.

[0056] <Regarding the main body housing>

[0057] The main body housing 30 is made of a metal material such as stainless steel, as Figure 1 shown, houses the rotor 20, and includes a first main body housing 31 and a second main body housing 32. In addition, the main body housing 30 in this embodiment is made of a metal material such as stainless steel, but it is not limited thereto. For example, it can also be made of a resin material.

[0058] The first main body housing 31 has a circular shape when viewed from the direction of the axis L, and includes a top wall 31a and a side peripheral wall 31b formed by a cylindrical shape extending from the outer peripheral edge of the top wall 31a to the other side. An opening 31c is formed in the side peripheral wall 31b of the first main body housing 31 (refer to Figure 2 ), and when viewed from the direction of the axis L, another opening (not shown) is formed at a position rotated 270° counterclockwise from the one opening 31c (refer to Figure 3 ). The suction side joint member 1 and the discharge side joint member 2 are respectively fixed to the one opening 31c and the other opening in a sealed state. In addition, when viewed from the direction of the axis L, the first main body housing 31 is formed with a raised portion 31e that bulges to one side along the radial direction from the fixed position of the suction side joint member 1 to the center position of the axis L (refer to Figure 3 ).

[0059] The second main body housing 32 has a circular shape when viewed from the direction of the axis L, and includes: an outer peripheral flange 32a that is vertically provided on the other side; a blade housing portion 32b that horizontally extends from one end side of the outer peripheral flange 32a to the inner peripheral side; a cylindrical rotor magnet housing portion 32c that is provided on the other inner peripheral side of the blade housing portion 32b; and a bottomed cylindrical shaft fixing member housing portion 32d that is provided on the other inner peripheral side of the rotor magnet housing portion 32c.

[0060] Among them, the outer peripheral flange 32a of the other main body housing 32 is fixedly installed in a sealed state on the inner wall 31d at the other end of the side peripheral wall 31b of the one main body housing 31. Thus, an internal space surrounded by the one main body housing 31 and the other main body housing 32 and fluidly communicating with the suction side joint member 1 and the discharge side joint member 2 is formed within the main body housing 30.

[0061] <Regarding the shaft fixing member and the fixed shaft>

[0062] The shaft fixing member 41 is, for example, fitted into the shaft fixing member housing portion 32d by press-fitting or the like. The shaft fixing member 41 has a shaft hole 41a centered on the axis L, and the lower end portion of the fixed shaft 42 is fixed to the shaft hole 41a by press-fitting or the like. The bearing portion 21a of the impeller member 21 is rotatably inserted into the cantilever-supported fixed shaft 42 via a thrust washer 6 that alleviates dynamic friction.

[0063] <Regarding the blade housing>

[0064] When viewed from the direction of the axis L, the blade housing 43 has a circular shape. The blade housing 43 includes: a side surface 43a having an opening 43aa centered on the axis L and an outer diameter that gradually increases along the circumferential flow from the installation position of the suction side joint member 1 to the installation position of the discharge side joint member 2; a foot portion 43b provided on the outer peripheral side of the side surface 43a; and a side peripheral wall 43c that is connected to the outer peripheral edge of the side surface 43a and the inner peripheral edge of the foot portion 43b, respectively. In addition, the outer diameter of the side peripheral wall 43c of the blade housing 43 is formed to be smaller than the inner diameter of the side peripheral wall 31b of the one main body housing 31, and the height of the side peripheral wall 43c of the blade housing 43 is formed to be smaller than the height of the side peripheral wall 31b of the one main body housing 31.

[0065] As Figure 2 shown, the foot portion 43b of the blade housing 43 is fixedly installed in a sealed state on the side peripheral wall 31b of the one main body housing 31 in a state of abutting against one side surface of the other main body housing 32 on the suction side joint member 1 side. Additionally, although not shown, the side peripheral wall 43c of the blade housing 43 has a shape corresponding to the side peripheral wall 31b of the one main body housing 31 on the discharge side joint member 2 side, that is, it has an opening (not shown) at a position corresponding to another opening of the one main body housing 31, and the side peripheral wall 43c of the blade housing 43 is fixedly installed in a sealed state together with the discharge side joint member 2 via the opening in a state of abutting against the side peripheral wall 31b of the one main body housing 31.

[0066] As Figure 1 and Figure 2As shown, the blade housing 43 forms a fluid path between the one-side main housing 31. On the other hand, the suction blade part 21d and the outer blade part 21e are received between the blade housing 43 and the blade receiving part 32b of the other-side main housing 32. The fluid path has a radial fluid path S1 formed between the raised part 31e of the one-side main housing 31 and the blade housing 43, and an impeller receiving space S2 that communicates with the radial fluid path S1 via the opening 43aa of the blade housing 43. The radial fluid path S1 and the impeller receiving space S2 are respectively in fluid communication with the suction-side joint member 1 and the discharge-side joint member 2.

[0067] <Fluid Path of Cooling Device with Sealed Pump>

[0068] Regarding the fluid path of the cooling device with the sealed pump 100, although not shown in the figure, it is connected to the sealed pump 100, the heat exchanger with the object to be cooled, and the radiator (e.g., air cooling or water cooling based on a fan, etc.) in sequence via the cooling circulation path, and is composed of a closed loop that circulates again in the sealed pump 100. Therefore, the object to be cooled is cooled by the working fluid (e.g., water, etc.) that circulates between the heat exchanger and the radiator via the sealed pump 100. In the cooling device with the sealed pump 100, the heat-generating parts, equipment, etc. are cooled by the circulation of the fluid, so the durability, operability, and quietness are excellent.

[0069] Next, use Figure 1 and Figure 2 to explain the fluid path in the operating state of the sealed pump 100. First, by passing an electric current through the coil 63 of the stator assembly 50, the coil 63 is excited. The excitation of this coil 63 acts on the rotor magnet 22, whereby the impeller part 21 fixed to the rotor magnet 22 rotates around the fixed shaft 42 inserted through the shaft fixing part 41.

[0070] As Figure 2 shown, by the rotation of the impeller part 21, a negative pressure is generated near the opening 43aa of the blade housing 43 by the suction blade part 21d. Due to this negative pressure, the working fluid is sucked from the suction-side joint member 1 that is in fluid connection with the radiator via the radial fluid path S1 defined by the blade housing 43 and the raised part 31e of the one-side main housing 31 (refer to Figure 3 ) into the opening 43aa of the blade housing 43.

[0071] Moreover, the fluid sucked into the opening 43aa of the blade housing 43 moves spirally along the outer side in the radial direction of the impeller receiving space S2 and the inner side of the circumferential wall 43c of the blade housing 43 due to the centrifugal force of the outer blade part 21e, and finally is discharged to the heat exchanger via the discharge-side joint member 2.

[0072] <Regarding the stator assembly>

[0073] Thus, the description of the stator assembly 50 of the present embodiment using Figure 1 and Figure 2 is returned. As Figure 1 shown, the stator assembly 50 includes a stator 60, a substrate 70, a coil cover 80, and a coil housing 90.

[0074] <Regarding the stator>

[0075] As Figure 4 and Figure 5 shown, the stator 60 includes: a stator core 61 formed by laminating thin magnetic plates made of a magnetic material; a bobbin housing 62 made of an insulating material such as resin and covering a part of the stator core 61; and a plurality of coils 63 wound around the stator core 61 with the bobbin housing 62 interposed therebetween. The bobbin housing 62 has a rectangular outer shape, and has support portions 62b provided at respective corners, cutout portions 62ba provided in the support portions 62b and through which fastening members 8 are inserted, and a plurality of terminal pins 64 disposed on the inner peripheral side of the support portions 62b and electrically connected to the ends of the coils 63 (see Figure 5 ).

[0076] <Regarding the substrate>

[0077] As Figure 4 and Figure 5 shown, the substrate 70 has a substantially rectangular shape, controls the drive signal to the coils 63, and has an opening 70a centered on the axis L, cutout portions 70b provided at respective corners and through which fastening members 8 are inserted when viewed from the direction of the axis L, and a plurality of pin holes 70h disposed on the inner peripheral side of the cutout portions 70b. Further, as Figure 5 shown, a connector 70c having a cable 70d for power supply terminals for supplying power to the substrate 70 is connected to the other side surface of the substrate 70.

[0078] <Regarding the coil cover>

[0079] As Figure 4 shown, in order to prevent physical contact and attachment of foreign substances such as dust to the coils 63, the coil cover 80 covers and protects at least a part of one side surface of the coils 63 and is made of a resin material. In this way, by making the coil cover 80 detachable from one side of the coils 63, cost reduction can be achieved compared to the case where one side of the coils 63 is resin-molded.

[0080] Specifically, as Figure 6As shown, the coil cover 80 has: a covering portion 80a having a substantially rectangular shape and having an opening 80aa centered on the axis L; a mounting portion 80b provided outside the covering portion 80a in the radial direction; a plurality of connecting portions 80c connecting the covering portion 80a and the mounting portion 80b; and fastening holes 80e provided at each corner for inserting a fastening member 8. The plurality of connecting portions 80c extend from the outer peripheral edge of the covering portion 80a to the other side, and the mounting portion 80b extends outside in the radial direction from the other end of the connecting portion 80c. Thus, as Figure 1 shown, in the assembled state of the rotor assembly 10 and the stator assembly 50, by opposing the other end portion on the outer peripheral side of the main body housing 30, that is, the other end portions of the side peripheral wall 31b and the outer peripheral flange 32a, to one side of the mounting portion 80b, space saving in the direction of the axis L can be achieved, which will be described in detail later. Among them, in the coil cover 80, a covering portion outer peripheral opening 80d is defined by the covering portion 80a, a pair of adjacent connecting portions 80c, and the mounting portion 80b, respectively. In the coil cover 80, as Figure 8 shown, the first wall portion 62a1 of the bobbin housing 62 is inserted into the opening 80aa, and the second wall portion 62a2 of the bobbin housing 62 having a corresponding shape is inserted into the covering portion outer peripheral opening 80d, which will be described in detail later. In addition, as Figure 5 shown, the coil cover 80 has a drooping wall 80f vertically provided from one side of the mounting portion 80b.

[0081] In addition, in the present embodiment, the coil cover 80 is adopted, but the coil cover 80 is not an essential structure. For example, it is also possible to resin-mold one side of the stator 60 in such a manner that a part of one side surface of the bobbin housing 62 is exposed as the main body housing abutting portion, or to omit the coil cover 80 itself.

[0082] <Regarding the coil housing>

[0083] As Figure 5 shown, the coil housing 90 covers and protects the other side surface of the coil 63 in order to prevent physical contact and the attachment of foreign matters such as dust to the coil 63, and is made of a resin material. As Figure 4 shown, the coil housing 90 has a substantially rectangular shape, has a coil housing bottom 90a (the other side portion of the coil housing), a coil housing side portion 90b (the side portion of the coil housing) erected from the periphery of the coil housing bottom 90a, a bobbin housing receiving portion 90c provided at each corner of the coil housing bottom 90a and the coil housing side portion 90b, and formed in the bobbin housing receiving portion 90c and corresponding to the threaded portion 8a of the fastening member 8 (refer to Figure 9)The screwed fastening hole 90ca. An opening 90aa (vent hole) centered on the axis L and a connector insertion hole 90ab (vent hole) are formed at the bottom 90a of the coil housing. Further, on the side portion 90b of the coil housing 90 of the coil housing, a cable cutout portion 90ba (see Figure 5 ) is formed between the drooping wall 80f of the coil cover 80 (see Figure 2 ) through which the cable 70d (see Figure 4 ) can be inserted.

[0084] <Regarding the bracket>

[0085] As Figure 4 shown, the bracket 5 has: a top plate 5b having an outer shape with a substantially rectangular shape, and having a U-shaped recess 5a corresponding to the shape of the raised portion 31e of one side main body housing 31 when viewed from the direction of the axis L; a protruding portion 5c protruding from each corner of the top plate 5b toward the other side and radially outward; and a fastening hole 5ca formed in the protruding portion 5c through which the fastening member 8 is inserted.

[0086] In addition, in the present embodiment, the bracket 5 and the fastening member 8 are used as means for fixing the rotor assembly 10 and the stator assembly 50 to each other in the axial direction L and the circumferential direction, but it is not limited thereto. For example, four L-shaped clips and fastening members, or other locking members can also be used, which will be described in detail later.

[0087] <Regarding the detailed structure of the stator>

[0088] From here on, Figure 7 the detailed structure of the stator 60 of the present embodiment (the stator core 61, the bobbin housing 62, and the coil 63) will be described.

[0089] The stator core 61 is formed by laminating thin magnetic plates made of a magnetic material, and when viewed from the direction of the axis L, it includes an outer peripheral ring portion (not shown) formed in a ring shape and a plurality of (for example, nine) salient pole portions (not shown) protruding in a T shape at equal angular intervals in the circumferential direction from the outer peripheral ring portion toward the radially inner side. When viewed from the direction of the axis L, the outer peripheral ring portion is arranged on the same circle.

[0090] As Figure 7As shown in (b), when the coil 63 is wound on the stator core 61, in order to ensure the insulation between the stator core 61 and the coil 63, the bobbin case 62 is formed of an insulating material such as resin and is provided between the stator core 61 and the coil 63. The bobbin case 62 is composed of a bobbin case body 62a and a support portion 62b. The bobbin case body 62a is formed with a main body insertion hole 62a1h for inserting the main body case 30 around the axis L, and the stator core 61 is built in the direction of the axis L. The support portion 62b is as shown in FIG. Figure 1 As shown, a coil case abutment portion 62bb is provided on the outer edge side of the bobbin case main body 62a and is supported by the coil case 90.

[0091] Specifically, the bobbin housing 62 includes: a plurality of first wall portions 62a1 forming a main body insertion hole 62a1h into which the main body housing 30 is inserted; a plurality of second wall portions 62a2 surrounding the coil 63 from the outer peripheral side; and a plurality of main body portions 62ab (see Figure 7 (b)) connects the first wall portion 62a1 and the second wall portion 62a2 and is provided for the coil 63 to be wound.

[0092] The first wall portion 62a1 is formed corresponding to the end position of each salient pole portion of the stator core 61, and extends to one side and the other side. Figure 7 As shown in (a), when viewed from the axis L direction, the inner peripheral surface of the first wall portion 62a1 is arranged on the same virtual circle (see the dotted line in the figure) that defines the main body insertion hole 62a1h.

[0093] like Figure 4 as well as Figure 5 As shown in FIG. 1 , the second wall portion 62a2 extends to one side and the other side respectively. Figure 7 As shown in (a), when viewed from the axis L, the inner circumferential surface 62a2i of the second wall portion 62a2 is arranged on the same circle. Figure 4 as well as Figure 7 As shown in (a), the second wall portion 62a2 extending to one side is arranged in a plurality (for example, four) along the circumferential direction. The circumferential gap of the second wall portion 62a2 is formed at a position where the main body portion 62ab is not arranged on the radial inner side of the circumferential gap. When the stator assembly 50 is assembled, the connecting portion 80c of the coil cover 80 is inserted into the circumferential gap. In addition, as shown in FIG. Figure 5 As shown, a plurality of second wall portions 62a2 extending to the other side are evenly arranged in the circumferential direction.

[0094] In addition, in the present embodiment, the second wall portions 62a2 are described as being arranged on the same circle when viewed from the axis L direction, but the present invention is not limited thereto. For example, the second wall portions 62a2 may be arranged so as to form sides of a polygon when viewed from the axis L direction.

[0095] As Figure 7 As shown in (b) of Figure 7 , when viewed from a direction orthogonal to the axis L, the main body portion 62ab is formed to surround a connecting portion (not shown) that connects the outer peripheral ring portion of the stator core 61 and the front end positions of the respective salient pole portions, and a coil 63 is wound around the main body portion 62ab. Accordingly, the plurality of coils 63 are arranged at constant intervals in the circumferential direction. Further, as described above, since the second wall portion 62a2 is not formed on the outer peripheral side of the main body portion 62ab, the outer peripheral edge of the wound coil 63 is reliably guided into the inner peripheral surface 62a2i of the second wall portion by the second wall portion 62a2. Thereby, when assembling the stator assembly 50, it is possible to prevent the coil 63 from being damaged due to contact between the connecting portion 80c of the coil cover 80 inserted into the circumferential gap of the second wall portion 62a2 and the coil 63.

[0096] As Figure 7 As shown in (b) of Figure 7 , at the other end portions of the first wall portion 62a1 and the second wall portion 62a2, a substrate contact portion 62a1b (substrate contact portion) of the first wall portion and a substrate contact portion 62a2b (substrate contact portion) of the second wall portion that directly contact the substrate 70 in the direction of the axis L are formed. When viewed from a direction orthogonal to the axis L, the substrate contact portion 62a1b of the first wall portion and the substrate contact portion 62a2b of the second wall portion are located on the same plane.

[0097] <Regarding the assembling process of the stator assembly>

[0098] The assembling process of the stator assembly 50 will be described using Figures 4 to 8 First, regarding the assembling process of the stator 60 and the substrate 70, a plurality of terminal pins 64 (see Figure 5 ) of the stator 60 are inserted into a plurality of pin holes 70h provided at corresponding positions on the substrate 70, and in a state where the substrate contact portion 62a1b of the first wall portion and the substrate contact portion 62a2b of the second wall portion (see Figure 7 (b)) are in contact with the substrate 70, the terminal pins 64 are fixed to the substrate 70 by soldering.

[0099] Next, regarding the process of assembling the mutually fixed stator 60 and substrate 70 to the coil housing 90, as shown in Figure 5 , the connector 70c provided on the other side surface of the substrate 70 is inserted into the connector insertion hole 90ab, and as shown in Figure 4 , the coil housing contact portion 62bb of the support portion 62b provided at the four corners of the bobbin housing 62 is placed on the bobbin housing receiving portion 90c of the coil housing 90.

[0100] Finally, regarding the assembling process of the stator 60 placed on the coil housing 90 and the coil cover 80, a plurality of first wall portions 62a1 (see Figure 7(a)) are respectively inserted into the opening 80aa of the coil cover 80, and the second wall portion 62a2 of the bobbin case 62 (see Figure 7 (a)) are respectively inserted into the outer peripheral opening 80d of the covering portion of the coil cover 80 having a corresponding shape. At this time, the other side surface of the mounting portion 80b of the coil cover 80 is placed on one side surface of the support portion 62b of the bobbin case 62, and the connecting portions 80c of the coil cover 80 are respectively inserted into the circumferential gaps of the second wall portion 62a2 of the bobbin case 62 provided at corresponding positions. In addition, at the same time, the drooping wall 80f of the bobbin case 62 (see Figure 5 ) is engaged with one side of the cable cutout portion 90ba of the coil case 90 (see Figure 4 ), thereby forming Figure 2 the cable insertion hole 9 (vent hole) shown in FIG. 9, and the cable 70d is led out to the outside through the cable insertion hole 9.

[0101] <Regarding the assembly process of the rotor assembly and the stator assembly>

[0102] Use Figure 9 to describe the assembly process of the rotor assembly 10 and the stator assembly 50. First, in a state where the axes L of the rotor assembly 10 and the stator assembly 50 are aligned with each other, the rotor assembly 10 is moved closer to the other side of the axis L with respect to the stator assembly 50.

[0103] Then, the rotor magnet housing portion 32c of the rotor assembly 10 is inserted through the main body insertion hole 62a1h of the stator 60, and the shaft fixing member housing portion 32d of the rotor assembly 10 is inserted through the opening 70a of the substrate 70 and the opening 90aa of the coil case 90.

[0104] Moreover, by bringing the blade housing portion 32b of the rotor assembly 10 into contact with the main body housing contact portion 62a1a of the first wall portion (see Figure 9 the dot pattern in (a) and (b)) (main body housing contact portion) and the main body housing contact portion 62a2a of the second wall portion (see Figure 9 the lattice pattern in (a) and (b)) (main body housing contact portion) in direct contact, the rotor magnet 22 is disposed opposite to the inner peripheral side of the stator 60. At this time, as shown in Figure 1 , the other end portion on the outer peripheral side of the main body housing 30, that is, the other end portions of the side peripheral wall 31b and the outer peripheral flange 32a, are in a non-contact state with one end surface of the mounting portion 80b, so that only the main body housing contact portion 62a1a of the first wall portion (see Figure 1 the dot pattern in Figure 1The lattice pattern) in it is in direct contact with the main body housing 30. Additionally, by relatively rotating the rotor assembly 10 and the stator assembly 50, the pulling directions of the suction-side joint member 1, the discharge-side joint member 2, and the cable 70d can be freely selected. Furthermore, in the present embodiment, as Figure 1 shown, the substrate 70 is disposed opposite to the other end surface of the rotor magnet housing portion 32c in a state where the inner peripheral side end surface of the substrate 70 and the other end surface of the rotor magnet housing portion 32c are separated in the axial direction L of the axis L, but it is not limited thereto. For example, the inner diameter of the opening 70a of the substrate 70 can also be increased, and the rotor magnet housing portion 32c can be accommodated and disposed in a non-contact state within the opening 70a.

[0105] Finally, by engaging the concave portion 5a of the bracket 5 with the raised portion 31e of the rotor assembly 10, the rotation of the rotor assembly 10 is stopped, and the threaded portions 8a of the fastening members 8 are respectively screwed into the fastening holes 90ca of the coil housing 90 through the fastening holes 5ca of the bracket 5, the fastening holes 80e of the coil cover 80, and the cutout portions 62ba of the stator 60, and are fixed in the axial direction L. Thus, the spool housing 62 is clamped between the blade housing portion 32b of the main body housing 30 and the spool housing receiving portion 90c of the coil housing 90 in the axial direction L via the main body housing abutting portions 62a1a, 62a2a and the coil housing abutting portion 62bb. In addition, by forming an opening 90aa in the coil housing 90, in the assembled state of the rotor assembly 10 and the stator assembly 50, the shaft fixing member housing portion 32d (the other end portion of the main body housing) of the rotor assembly 10 can be lowered to a position interfering with the bottom 90a of the coil housing. Furthermore, in the present embodiment, the rotor assembly 10 and the stator assembly 50 are set to a fastening force that does not deform the main body housing 30 by the assembly of the bracket 5 and the fastening members 8.

[0106] In summary, the rotor assembly 10 and the stator assembly 50 are configured to be mutually detachable and attachable in the axial direction L via the bracket 5 and the fastening members 8.

[0107] <Regarding the existing problems 1 and 2 (substrate breakage due to large bending moment, clamping instability due to load dissipation)>

[0108] As described above, in Figure 13 and Figure 14In the existing hermetic pump 1300 shown, the other end 1362a of the spool housing 1362 loaded with the load F13 is in direct contact with the substrate 1370, and the arm length L13 of the load F13 is relatively large, so there is the existing problem point 1 (substrate breakage due to a large bending moment). Moreover, in the existing hermetic pump 1300, in the spool housing 1362, in the direction opposite to the direction of the load F13 (from one side to the other side of the axis L direction), the main body housing contact portion 1362a and the coil housing contact portion 1362bb are arranged in sequence. As a result, after the load F13 is converted into other non-preferred forms of force (bending force, tensile force, etc.), it acts on the coil housing contact portion 1362bb, so there is the existing problem point 2 (unstable clamping due to load dissipation).

[0109] In contrast, in the hermetic pump 100-1 of the present embodiment (refer to Figure 10 (b) of this), by adopting a substrate deformation suppression unit, it is possible to suppress the application of unnecessary loads to the substrate 70, and it is possible to reliably transfer the load F10 to the coil housing contact portion 62bb. Therefore, it is possible to eliminate both the existing problem point 1 (substrate breakage due to a large bending moment) and the existing problem point 2 (unstable clamping due to load dissipation) at the same time, improving the reliability.

[0110] <Regarding the substrate deformation suppression unit>

[0111] Figure 10 (a) of this is a schematic diagram for explaining the load borne by the spool housing 62 after the rotor assembly 10 and the stator assembly 50 shown in Figure 9 are assembled. In the description so far, the main body housing contact portion is set as the main body housing contact portion 62a1a of the first wall portion and the main body housing contact portion 62a2a of the second wall portion. However, the main body housing contact portion of the present embodiment can be in any form as long as it is on one side of the spool housing main body 62a outside the radial direction of the main body insertion hole 62a1h. Therefore, among them, in order to show a wider form that the main body housing contact portion of the present embodiment can take, first, the hermetic pump 100-1 of the present embodiment shown in Figure 10 (b) of this will be used for explanation.

[0112] As shown in Figure 10 (b) of this, the stator 60-1 in the hermetic pump 100-1 of the present embodiment includes: a spool housing main body 62a, one end of its second wall portion 62a2' does not contact the blade receiving portion 32b of the main body housing 30, but only contacts the main body housing contact portion 62a1a of the first wall portion (refer to the dotted pattern in the figure). The load F10 applied to the main body housing contact portion 62a1a of the first wall portion has the arm length L1 of the load F10.

[0113] As shown in Figure 10 (b) of [reference], in the substrate deformation suppression unit, the main body housing contact portion 62a1a is located on one side surface of the spool housing main body 62a outside the radial direction of the main body insertion hole 62a1h, and is arranged in the order of the main body housing contact portion 62a1a, the coil housing contact portion 62bb, and the substrate 70 from one side (upper side) to the other side (lower side) in the direction of the axis L. Thus, in the assembly process of the rotor assembly 10 and the stator assembly 50, compared with the arm length L13 of the load F13 in the existing seal pump 1300 (refer to Figure 13 ), the arm length L1 of the load F10 applied to the main body housing contact portion 62a1a can be reduced. Therefore, the bending moment acting on the spool housing main body 62a can also be reduced similarly. In addition, the load F10 does not pass through the substrate 70, and moreover, it is not converted into other forms of forces (such as bending force and tensile force) that are not preferable as much as possible, and can be reliably transmitted from the main body housing contact portion 62a1a of the spool housing 62-1 to the coil housing contact portion 62bb. Moreover, in the substrate deformation suppression unit of the present embodiment, when forming the main body housing contact portion 62a1a, the first wall portion 62a1 can be utilized, so that cost reduction can be achieved. Thus, in the seal pump 100-1 of the present embodiment, by adopting Figure 10 (b) of [reference], the substrate deformation suppression unit can suppress the application of unnecessary loads to the substrate 70. Therefore, the existing problem point 1 (substrate breakage due to large bending moment) and the existing problem point 2 (unstable clamping due to load dissipation) can be eliminated simultaneously, the reliability can be improved, and further cost reduction can be achieved.

[0114] In addition, in Figure 10 (b) of [reference], the main body housing contact portion is the main body housing contact portion 62a1a of the first wall portion, but it is not limited thereto. As long as it is located on one side surface of the spool housing main body 62a outside the radial direction of the main body insertion hole 62a1h, it can be in any form.

[0115] As described above, in the seal pump 100-1 of the present embodiment, by adopting the substrate deformation suppression unit, the existing problem point 1 (substrate breakage due to large bending moment) and the existing problem point 2 (unstable clamping due to load dissipation) can be eliminated simultaneously, and the reliability can be improved. Thus, in order to further suppress the application of unnecessary loads to the substrate 70, the seal pump 100-1 of the present embodiment (refer to Figure 10 (b)) or the existing seal pump 1300 (refer to Figure 13 and Figure 14)Concerns 1 to 3 existing in the memory. After that, in order to eliminate these concerns, the substrate deformation suppression units (1) to (3) adopted in the hermetic pump 100 of the present embodiment are described respectively. In addition, in order to eliminate the thermal problem of the substrate 70, the existing hermetic pump 1300 (refer to Figure 13 and Figure 14 ) is shown. After concern 4 existing therein, in order to eliminate this concern 4, the substrate cooling unit adopted in the hermetic pump 100 of the present embodiment is described.

[0116] <Regarding Concern 1 (Effect of Small Contact Area)>

[0117] In the substrate deformation suppression unit of the present embodiment, as shown in (b) of Figure 10 , since the main body housing contact portion is set to be only the main body housing contact portion 62a1a of the first wall portion, the contact area of one side surface of the spool housing main body 62a with respect to the rotor assembly 10 is relatively small. Therefore, in the substrate deformation suppression unit of the present embodiment, in the assembled state of the rotor assembly 10 and the stator assembly 50, the blade accommodation portion 32b of the main body housing 30 is inclined with respect to the horizontal plane, and it may not be possible to stably support the rotor assembly 10. In addition, in the substrate deformation suppression unit of the present embodiment, compared with the arm length L13 of the load F13 in the existing hermetic pump 1300 (refer to Figure 13 ), the arm length L1 of the load F10 borne by the main body housing contact portion 62a1a can be reduced. However, in the substrate deformation suppression unit of the present embodiment, a relatively large load F10 is still locally applied, so there is a concern that the effect of reducing the bending moment acting on the spool housing main body 62a cannot be fully exerted (hereinafter, referred to as "Concern 1 (Effect of Small Contact Area)").

[0118] In contrast, as shown in (a) of Figure 10 , in the hermetic pump 100 of the present embodiment, by adopting the substrate deformation suppression unit (1) (double concentric main body housing contact portion), Concern 1 (Effect of Small Contact Area) can be eliminated, the rotor assembly 10 can be stably supported, and the effect of reducing the bending moment acting on the spool housing main body 62a can be fully exerted.

[0119] <Regarding the Substrate Deformation Suppression Unit (1) (Double Concentric Main Body Housing Contact Portion)>

[0120] The substrate deformation suppression unit (1) (double concentric main body housing contact portion) is as shown in Figure 10As shown in (a) thereof, the main body housing abutting portions are the main body housing abutting portion 62a1a (refer to the dot pattern in the figure) of the first wall portion and the main body housing abutting portion 62a2a (refer to the lattice pattern in the figure) of the second wall portion. Thus, in the substrate deformation suppression unit 1 (double concentric main body housing abutting portions) of the present embodiment, the abutting areas of the main body housing abutting portions 62a1a and 62a2a with respect to the rotor assembly 10 can be made relatively large, and the shape of the abutting surface can be formed into double concentric circles centered on the axis L. In addition, in the substrate deformation suppression unit (1) (double concentric main body housing abutting portions) of the present embodiment, Figure 10 the load F10 in the substrate deformation suppression unit shown in (b) can be dispersed relatively small into the load F1 borne by the main body housing abutting portion 62a1a of the first wall portion and the load F2 borne by the main body housing abutting portion 62a2a of the second wall portion, and the arm length L2 of the load F2 can be made smaller than the arm length L1 of the load F1. Therefore, the total bending moment can be reduced. Moreover, in the substrate deformation suppression unit (1) (double concentric main body housing abutting portions) of the present embodiment, when forming the main body housing abutting portions 62a1a and 62a2a, the first wall portion 62a1 and the second wall portion 62a2 can be utilized, so that cost reduction can be achieved. Thus, in the seal pump 100 of the present embodiment, by adopting the substrate deformation suppression unit (1) (double concentric main body housing abutting portions), concern 1 (influence of small abutting area) can be eliminated, the rotor assembly 10 can be stably supported, and the effect of reducing the bending moment acting on the spool housing main body 62a can be fully exerted, and further cost reduction can be achieved.

[0121] <Regarding concern 2 (low rigidity on the line of action force)>

[0122] In Figure 13 the existing seal pump 1300 shown, since no component with relatively high rigidity is interposed on the line of action force from the other end portion 1362a of the spool housing 1362 loaded with the load F13 toward the other side, the deformation amount in the axial direction L of the spool housing 1362 and the substrate 1370 may become extremely large (hereinafter, referred to as "concern 2 (low rigidity on the line of action force)").

[0123] In contrast, as Figure 10 shown in (a) thereof, in the seal pump 100 of the present embodiment, by adopting the substrate deformation suppression unit (2) (the stator core on the line of action force), concern 2 (low rigidity on the line of action force) can be eliminated, and the deformation amount in the axial direction L of the spool housing 62 and the substrate 70 can be made extremely small.

[0124] <Regarding the substrate deformation suppression unit (2) (the stator core on the line of action force)>

[0125] As shown in Figure 10 (a) of the figure, when the substrate deformation suppression unit (2) (the stator core on the line of action) bears the load F1 and the load F2 at the main body housing contact portion 62a1a of the first wall portion and the main body housing contact portion 62a2a of the second wall portion respectively to become the action points, the stator core 61 with relatively high rigidity is arranged on the line of action force toward the other side from each of the main body housing contact portions 62a1a and 62a2a. Thus, in the sealed pump 100 of the present embodiment, by adopting the substrate deformation suppression unit (2) (the stator core on the line of action), the concern 2 (low rigidity on the line of action force) can be eliminated, and the deformation amount of the spool housing 62 and the substrate 70 in the axial direction of the axis L can be minimized. Moreover, in the sealed pump 100 of the present embodiment, the loads F1 and F2 are not converted into other forms of forces (such as bending force or tensile force) that are not preferable as much as possible, and can be reliably transmitted from the main body housing contact portions 62a1a and 62a2a in the spool housing 62 to the coil housing contact portion 62bb.

[0126] <Regarding concern 3 (deformation of the substrate caused by the connector)>

[0127] In Figure 13 In the existing sealed pump 1300 shown in the figure, on the other side of the stator assembly 1350, that is, on the other side surface of the substrate 1370, a connector 1370c for power supply terminals for supplying power to the substrate 1370 is provided. At this time, since the connector 1370c interferes with the bottom portion 1390a of the coil housing, there is a concern that the substrate 1370 may deform in the direction of one side of the axis L (hereinafter, referred to as "concern 3 (deformation of the substrate caused by the connector)").

[0128] In contrast, as shown in Figure 2 the figure, in the sealed pump 100 of the present embodiment, by adopting the substrate deformation suppression unit (3) (preventing interference of the other end of the connector), the concern 3 (deformation of the substrate caused by the connector) can be eliminated, and the reliability can be improved.

[0129] <Regarding the substrate deformation suppression unit (3) (preventing interference of the other end of the connector)>

[0130] The substrate deformation suppression unit (3) (preventing interference of the other end of the connector) is as shown in Figure 2As shown, in order to prevent the connector 70c from interfering with the bottom 90a of the coil housing, a connector insertion hole 90ab is formed in the bottom 90a of the coil housing, and the connector 70c is inserted through the connector insertion hole 90ab. Further, the substrate deformation suppression unit (3) (to prevent interference at the other end of the connector) is configured such that, in a state where the connector 70c is inserted into the connector insertion hole 90ab, the other end of the connector 70c does not protrude outward more than the bottom 90a of the coil housing (the other side of the coil housing). Thus, the connector 70c does not interfere with the bottom 90a of the coil housing in the axial direction of the axis L, and further, when the hermetic pump 100 is directly placed on the floor or the like, it does not interfere with the floor or the like. Therefore, in the hermetic pump 100 of the present embodiment, by adopting the substrate deformation suppression unit (3) (to prevent interference at the other end of the connector), concern 3 (deformation of the substrate caused by the connector) can be eliminated, and the reliability can be improved.

[0131] <Regarding concern 4 (insufficient cooling of the substrate)>

[0132] In Figure 13 the existing hermetic pump 1300 shown, the other end of the first wall portion 1362a1 and the other end of the second wall portion 1362a2 respectively serve as substrate contact portions. Among them, a plurality of substrate contact portions 1362a1b of the first wall portion are circumferentially arranged with a wall portion slit SL13 therebetween (refer to Figure 14 (b) of this document), and the substrate contact portion 1362a2b of the second wall portion is continuously formed in the circumferential direction, but not shown. Further, as Figure 13 shown, a coil other side space A1 defined by the first wall portion 1362a1, the second wall portion 1362a2, the substrate 1370, and the coil 1363, and a substrate accommodation space A2 defined by the substrate 1370 and the coil housing 1390 are respectively formed inside the coil housing 1390.

[0133] Therefore, in the existing hermetic pump 1300, the substrate accommodation space A2 communicates with the external environment through the opening 1390aa at the bottom 1390a of the coil housing with a relatively large opening area. Thus, a ventilation path based on convection is formed in the substrate accommodation space A2, and the other end face of the substrate 1370 can be cooled by the inflowing atmospheric air. On the other hand, the space A1 on the other side of the coil communicates with the substrate accommodation space A2 only through the wall slit SL13. Therefore, it is necessary for the atmospheric air to flow into and out of the space A1 on the other side of the coil through the same wall slit SL13. As a result, the flow of the ventilation path near the wall slit SL13 stagnates, and the cooling efficiency of the space A1 on the other side of the coil becomes extremely low. Thus, there is a concern that the one end face of the substrate 1370, which is heated and self-heated by the coil 1363 as a heat source, cannot be sufficiently cooled (hereinafter referred to as "concern 4 (insufficient cooling of the substrate)"). In addition, in the existing hermetic pump 1300, when the bottom 1390a of the coil housing is directly placed on the floor or the like, the opening 1390aa at the bottom 1390a of the coil housing is completely closed. Therefore, there is also concern 4 (insufficient cooling of the substrate) not only for the one end face of the substrate 1370 but also for the other end face of the substrate 1370.

[0134] In addition, the space A1 on the other side of the coil formed between the substrate 1370 and the coil 1363 communicates with the space in the axial direction L of the upper part of the coil 1363 extending to one side in the axial direction L ( Figure 14 the space surrounded by the adjacent coils 1363 in (b) of). However, the space in the axial direction L is surrounded by the coil 1363 as a heat source, so the cooling effect on the space A1 on the other side of the coil is extremely low.

[0135] In contrast, as shown in Figure 2 、 Figure 5 and Figure 10 (a) of, in the hermetic pump 100 of the present embodiment, by adopting a substrate cooling unit (a stable ventilation path passing through the object to be cooled in the radial direction), concern 4 (insufficient cooling of the substrate) can be eliminated and the reliability can be improved.

[0136] <Regarding the substrate cooling unit (a stable ventilation path passing through the object to be cooled in the radial direction)>

[0137] In the substrate cooling unit (a stable ventilation path passing through the object to be cooled in the radial direction), as shown in Figure 10As shown in (a) thereof, within the coil housing 90, the substrate 70 is suspended from the substrate contact portion 62a1b (dot pattern in the figure) of the first wall portion and the substrate contact portion 62a2b (lattice pattern in the figure) of the second wall portion (on the other side of the spool housing). A coil other-side space A1 defined by the first wall portion 62a1, the second wall portion 62a2, the substrate 70, and the coil 63, and a substrate accommodation space A2 defined by the substrate 70 and the coil housing 90 are respectively formed. Moreover, in the substrate cooling unit (a stable ventilation path that passes through the object to be cooled in the radial direction), as Figure 5 shown, wall slits SL1 and SL2 that penetrate in the radial direction are respectively formed in the gaps between the first wall portions 62a1 that extend to the other side and are circumferentially arranged in plurality and the gaps between the second wall portions 62a2 (refer to Figure 5 ).

[0138] Therefore, in the hermetic pump 100 of the present embodiment, the substrate accommodation space A2 communicates with the external environment via the opening 90aa of the bottom portion 90a of the coil housing having a relatively large opening area. Thus, a ventilation path based on convection is formed in such a manner that the substrate accommodation space A2 is connected to the external environment, and the other end face of the substrate 70 can be cooled by the inflowing ambient air. In addition, the coil other-side space A1 as the object to be cooled communicates with the substrate accommodation space A2 at all times on the inner and outer sides in the radial direction via the wall slits SL1 and SL2 as the ventilation units (refer to Figure 5 ). Thus, a ventilation path that passes through the coil other-side space A1 in the radial direction is formed. Thereby, a stable ventilation path based on stable convection is formed between the coil other-side space A1 and the external environment via the substrate accommodation space A2, and the one end face of the substrate 70 can be effectively cooled by the inflowing ambient air.

[0139] In addition, the hermetic pump 100 of the present embodiment includes an opening 90aa and a connector insertion hole 90ab provided in the bottom portion 90a of the coil housing, and a cable insertion hole 9 provided in the side portion 90b of the coil housing. Therefore, when the hermetic pump 100 is directly placed on the floor or the like, the opening 90aa and the connector insertion hole 90ab provided in the bottom portion 90a of the coil housing are closed, while the cable insertion hole 9 provided in the side portion 90b of the coil housing can still communicate with the external environment. Thereby, in the hermetic pump 100 of the present embodiment, by adopting the substrate cooling unit (a stable ventilation path that passes through the object to be cooled in the radial direction), concern 4 (insufficient cooling of the substrate) can be eliminated, and the reliability can be improved.

[0140] In addition, the ventilation port in the hermetic pump 100 of the present embodiment adopts Figure 2All the openings 90aa, the connector insertion holes 90ab, and the cable insertion holes 9 shown, but not limited thereto. For example, since the sealed pump 100 is sometimes placed in a state where the bottom 90a of the coil housing is separated from the floor or the like, an air vent may be formed in at least one of the bottom 90a of the coil housing and the side portion 90b of the coil housing.

[0141] <Regarding the air vent unit>

[0142] As Figure 5 shown, the air vent unit in the sealed pump 100 of the present embodiment is the wall slit SL1 that penetrates the gap between the plurality of first wall portions 62a1 on the other side in the radial direction, and the wall slit SL2 that penetrates the gap between the plurality of second wall portions 62a2 on the other side in the radial direction. In addition, as long as the air vent unit enables the inner and outer sides in the radial direction in the space A1 on the other side of the coil to communicate with the substrate accommodation space A2 to form an air vent path passing in the radial direction, various forms can be adopted.

[0143] Hereinafter, using Figure 11 and Figure 12 , the modification examples (1) to (3) of the air vent unit will be described. First, the differences between the modification examples (1) and (2) of the air vent unit and the present embodiment are that in the bobbin housings 62', 62" of the stators 60', 60", only one of the other ends of the first wall portion 62a1 and the other ends of the second wall portion 62a2 becomes the substrate contact portion, and the other basic structures are the same as those of the present embodiment. In addition, the difference between the modification example (3) of the air vent unit and the present embodiment is that in the bobbin housing 62'" of the stator 60'", a protruding portion 62a3 extending to the other side is provided, and only the other end of the protruding portion 62a3 becomes the substrate contact portion, and the other basic structures are the same as those of the present embodiment.

[0144] <Regarding the modification example (1) of the air vent unit>

[0145] Using Figure 11 of (a), the other ends of the first wall portion 62a1 and the other ends of the second wall portion 62a2' in the modification example (1) of the air vent unit of the present embodiment will be described. In this modification example (1) of the air vent unit, in the bobbin housing main body 62a', only the other end of the first wall portion 62a1 becomes the substrate contact portion 62a1b (refer to the dot pattern in the figure), so a separation slit SL3 is formed in a circular ring shape between the other end of the second wall portion 62a2' and the substrate 70. Thus, the air vent unit in the modification example (1) of the air vent unit is composed of the wall slits SL1, SL2 and the separation slit SL3 in addition to the wall slits SL1, SL2.

[0146] Therefore, in the hermetic pump 100' of the ventilation unit modification example (1), via the wall slits SL1 and SL2 (refer to Figure 5 ), and the separation slit SL3, in the inner and outer sides in the radial direction in the space A1 on the other side of the coil, ventilation paths that are always in communication with the substrate accommodation space A2 respectively and pass through the space A1 on the other side of the coil in the radial direction are formed. Thus, in the hermetic pump 100' of the ventilation unit modification example (1), compared with the hermetic pump 100 of the present embodiment, the ventilation volume to the space A1 on the other side of the coil can be increased, and therefore, concern 4 (insufficient cooling of the substrate) can be more reliably eliminated, and the reliability can be further improved.

[0147] <Regarding the ventilation unit modification example (2)>

[0148] Use Figure 11 of (b) to explain the other end portions of the first wall portion 62a1' and the second wall portion 62a2 in the ventilation unit modification example (2) of the present embodiment. In this ventilation unit modification example (2), in the bobbin housing main body 62a", only the other end portion of the second wall portion 62a2 becomes the substrate contact portion 62a2b (refer to the lattice pattern in the figure), so a separation slit SL4 is formed in an annular shape between the other end portion of the first wall portion 62a1' and the substrate 70. Thus, the ventilation unit in the ventilation unit modification example (2) is composed of the separation slit SL4 in addition to the wall slits SL1 and SL2.

[0149] Therefore, in the hermetic pump 100" of the ventilation unit modification example (2), via the wall slits SL1 and SL2 (refer to Figure 5 ), and the separation slit SL4, in the inner and outer sides in the radial direction in the space A1 on the other side of the coil, ventilation paths that are always in communication with the substrate accommodation space A2 respectively and pass through the space A1 on the other side of the coil in the radial direction are formed. Thus, in the hermetic pump 100" of the ventilation unit modification example (2), similarly to the ventilation unit modification example (1), compared with the hermetic pump 100 of the present embodiment, the ventilation volume to the space A1 on the other side of the coil can be increased, and therefore, concern 4 (insufficient cooling of the substrate) can be more reliably eliminated, and the reliability can be further improved.

[0150] <Regarding the ventilation unit modification example (3)>

[0151] Use Figure 12 , to explain the other end portion of the protruding portion 62a3 in the ventilation unit modification example (3) of the present embodiment. In the ventilation unit modification example (3), as Figure 12As shown in (a), in the spool housing main body 62a”’, in addition to the first wall portion 62a1’ and the second wall portion 62a2’, a protruding portion 62a3 extending toward the other side in the direction of the axis L is provided on the outer side in the radial direction of the second wall portion 62a2’. In this modified example (3) of the ventilation unit, only the other end portion of the protruding portion 62a3 becomes the substrate contact portion 62a3b (refer to the vertical line pattern in the figure). Therefore, a separation slit SL4 is formed between the other end portion of the first wall portion 62a1’ and the substrate 70, and a separation slit SL3 is formed between the other end portion of the second wall portion 62a2’ and the substrate 70. Further, in this modified example (3) of the ventilation unit, as Figure 12 shown in (b), wall slits SL5 are formed in the gaps between the plurality of protruding portions 62a3 arranged circumferentially. Thus, the ventilation unit in the modified example (3) of the ventilation unit includes, in addition to the wall slits SL1 and SL2, separation slits SL3 and SL4 and wall slits SL5. Among them, the opening area of the wall slit SL5 is extremely large compared to the wall slits SL1 and SL2.

[0152] Therefore, in the sealed pump 100’” of the modified example (3) of the ventilation unit, through the wall slits SL1, SL2, SL5, separation slits SL3, and SL4 that are the ventilation unit, ventilation paths that are always in communication with the substrate accommodation space A2 and pass through the coil other side space A1 in the radial direction are formed on the inner and outer sides in the radial direction in the coil other side space A1. Thus, in the sealed pump 100”’ of the modified example (3) of the ventilation unit, compared to the sealed pumps 100’ and 100” of the modified examples (1) and (2) of the ventilation unit, the ventilation volume to the coil other side space A1 can be increased, so that concern 4 (insufficient cooling of the substrate) can be more reliably eliminated, and the reliability can be further improved.

[0153] In summary, in the sealed pump 100-1 of the present embodiment, by adopting the substrate deformation suppression unit, the arm length L1 of the load F10 applied to the main body housing contact portion 62a1a can be made relatively small, and the load F10 can be reliably transmitted to the coil housing contact portion 62bb without passing through the substrate 70. As a result, the existing problem point 1 (substrate breakage due to a large bending moment) and the existing problem point 2 (unstable clamping due to load dissipation) can be eliminated simultaneously, and the reliability can be improved.

[0154] In addition, in the sealed pump 100 of the present embodiment, as Figure 10 shown in (a), the main body housing contact portion 62a1a of the first wall portion and the main body housing contact portion 62a2a of the second wall portion are used as the main body housing contact portion. Further, in the sealed pump 100-1 of the present embodiment, as Figure 10As shown in (b) of , the main body housing abutting portion is only the main body housing abutting portion 62a1a of the first wall portion. However, the main body housing abutting portion of the present embodiment may be in any form as long as it is on one side of the spool housing main body 62a outside the radial direction of the main body insertion through hole 62a1h. Therefore, for example, one side surface of the spool housing main body 62a, that is, a protruding portion extending to a side other than the first wall portion 62a1 and the second wall portion 62a2, may be used as the main body housing abutting portion.

[0155] In addition, in the seal pump 100 of the present embodiment, by adopting the substrate deformation suppression unit (1) (double concentric main body housing abutting portion), the concern 1 (influence of small abutting area) can be eliminated, the rotor assembly 10 can be stably supported, and the effect of reducing the bending moment acting on the spool housing main body 62a can be fully exerted, thereby achieving cost reduction. Moreover, in the seal pump 100 of the present embodiment, by adopting the substrate deformation suppression unit (2) (stator core on the acting force line), the concern 2 (low rigidity on the acting force line) can be eliminated, and the deformation amount of the spool housing 62 and the substrate 70 in the axial direction of the axis L is extremely small. In addition, in the seal pump 100 of the present embodiment, by adopting the substrate deformation suppression unit (3) (preventing interference of the other end of the connector), the concern 3 (deformation of the substrate caused by the connector) can be eliminated, and the reliability can be improved. Moreover, in the seal pump 100 of the present embodiment, by adopting the substrate cooling unit (stable ventilation path passing through the cooling object in the radial direction), the concern 4 (insufficient cooling of the substrate) can be eliminated, and the reliability can be improved.

[0156] In addition, in the seal pump 100 of the present embodiment, in addition to the substrate deformation suppression unit, all of the substrate deformation suppression units (1) (double concentric main body housing abutting portion) to (3) (preventing interference of the other end of the connector) and the substrate cooling unit (stable ventilation path passing through the cooling object in the radial direction) are adopted, but it is not limited thereto. For example, in the present embodiment, only the substrate deformation suppression unit may be adopted, or the substrate deformation suppression unit may be adopted, and at least one of the substrate deformation suppression units (1) (double concentric main body housing abutting portion) to (3) (preventing interference of the other end of the connector) and the substrate cooling unit (stable ventilation path passing through the cooling object in the radial direction) may be adopted.

[0157] Moreover, the ventilation unit in the hermetic pump 100 of the present embodiment forms a ventilation path passing in the radial direction in order to connect the inner and outer sides in the radial direction in the space A1 on the other side of the coil to the substrate accommodation space A2, and uses the wall slits SL1 and SL2. However, as long as the ventilation unit of the present embodiment forms a ventilation path passing in the radial direction to connect the inner and outer sides in the radial direction in the space A1 on the other side of the coil to the substrate accommodation space A2, not only the wall slits SL1 and SL2 can be used, but also any combination of the separation slits SL3 and SL4 and the wall slit SL5 shown in the ventilation unit modification example (1), ventilation unit modification example (2), and ventilation unit modification example (3) can be used. In this way, in the ventilation unit modification example (1), ventilation unit modification example (2), and ventilation unit modification example (3), the ventilation amount to the space A1 on the other side of the coil can be increased, so that the concern 4 (insufficient cooling of the substrate) can be more reliably eliminated, and the reliability can be further improved.

[0158] <Other>

[0159] The hermetic pumps 100, 100-1, 100', 100", 100'" of the present embodiment can of course be applied to all fluid devices and fluid circuits including refrigeration devices. Moreover, the present invention is not limited to the above-described embodiments, and appropriate changes and modifications can be made without departing from the technical idea of the present invention.

[0160] Symbol Explanation

[0161] 100, 100-1, 100’, 100”, 100’’’—sealed pump; 1—inlet side joint component; 2—discharge side joint component; 5—bracket; 5a—recess; 5b—top plate; 5c—protrusion; 5ca—fastening hole; 6—thrust washer; 7—anti-disengagement component; 8—fastening component; 8a—threaded portion; 9—cable insertion through-hole (vent); 10—rotor assembly; 20—rotor; 21—impeller component; 21a—bearing portion; 21b—base end portion; 21c—diameter-expanded portion; 21d—inlet vane portion; 21e—outer vane portion; 22—rotor magnet; 30—main body housing; 31—one side main body housing; 31a—top wall; 31b—side peripheral wall; 31c—one opening; 31d—inner wall at the other end; 31e—protrusion; 32—other side main body housing; 32a—outer peripheral flange; 32b—vane storage portion; 32c—rotor magnet storage portion; 32d—shaft fixing component storage portion; 41—shaft fixing component; 41a—shaft hole; 42—fixed shaft; 43—vane housing; 43a—one side surface; 43aa—opening; 43b—foot portion; 43c—side peripheral wall; 50—stator assembly; 60, 60-1, 60’, 60”, 60’’’—stator; 61—stator core; 62, 62-1, 62’, 62”, 62’’’—bobbin housing; 62a, 62a’, 62a”, 62’’’—bobbin housing main body; 62ab—main body portion; 62a1, 62a1’—first wall portion; 62a1a—main body housing abutting portion of the first wall portion (main body housing abutting portion); 62a1b—substrate abutting portion of the first wall portion (substrate abutting portion); 62a1h—main body insertion through-hole; 62a2, 62a2’—second wall portion; 62a2a—main body housing abutting portion of the second wall portion (main body housing abutting portion); 62a2b—substrate abutting portion of the second wall portion (substrate abutting portion); 62a2i—inner peripheral surface; 62a3—protruding portion; 62a3b—substrate abutting portion of the protruding portion (substrate abutting portion); 62b—support portion; 62ba—cutout portion; 62bb—coil housing abutting portion; 63—coil; 64—terminal pin; 70—substrate; 70a—opening; 70b—cutout portion; 70c—connector; 70d—cable; 70h—pin hole; 80—coil cover; 80a—covering portion; 80aa—opening; 80b—mounting portion; 80c—connecting portion; 80d—outer peripheral opening of the covering portion; 80e—fastening hole; 80f—hanging wall; 90—coil housing; 90a—coil housing bottom (the other side portion of the coil housing); 90aa—opening (vent); 90ab—connector insertion through-hole (vent); 90b—coil housing side portion (the side portion of the coil housing); 90ba—cable cutout portion; 90c—bobbin housing receiving portion; 90ca—fastening hole; A1—coil other side space; A2—substrate storage space; F1, F2, F10—load; L—axis; L1, L2—arm length; S1—radial fluid path;S2 - impeller storage space; SL1, SL2, SL5 - wall slits (ventilation units); SL3, SL4 - separation slits (ventilation units).;

Claims

1. A sealed pump, characterized in that, have: A rotor assembly comprises: a rotor having a rotor magnet disposed on an impeller member and rotating around an axis; and a main body housing accommodating the rotor; A stator assembly, comprising: a stator, which winds a coil around a stator core via a bobbin housing; a base plate, which is fixed to the other side of the bobbin housing; and a coil housing, which is arranged on the other side of the base plate and protects the coil; as well as A substrate deformation suppression unit suppresses deformation of the substrate caused by a load along the axis (L) direction in an assembled state where the rotor assembly is detachable in the axis direction and the stator assembly is arranged with the rotor magnet disposed on the radial inner side of the stator, The bobbin shell comprises: a bobbin shell body, which is respectively provided with a body insertion hole for inserting the body shell, and a body shell abutment portion that directly abuts against the body shell in the axial direction; and a support portion, which is provided with a coil shell abutment portion supported by the coil shell, and the bobbin shell is clamped between the body shell and the coil shell in the axial direction via the body shell abutment portion and the coil shell abutment portion. As for the substrate deformation suppression unit, The main body housing abutment is located on a side surface of the bobbin housing body radially outside the main body insertion hole, and is arranged in the order of the main body housing abutment, the coil housing abutment, and the substrate from one side toward the other side in the axial direction.

2. The sealed pump according to claim 1, characterized in that: The bobbin housing body has: a first wall portion defining the main body insertion hole; a second wall portion that surrounds the coil from an outer peripheral side; and a main body connecting the first wall portion and the second wall portion and having the coil wound therearound, As for the substrate deformation suppression unit, The main body housing abutment portion is composed of at least one of the first wall portion and the second wall portion that form a double concentric circle centered on the axis.

3. The sealed pump according to claim 1, characterized in that: As for the substrate deformation suppression unit, In the assembled state of the rotor assembly and the stator assembly, the stator core built into the bobbin case body is located on a line of force from the body case abutment portion toward the other side on which a load is applied.

4. The sealed pump according to claim 1, characterized in that: A connector for a power supply terminal for supplying power to the substrate is connected to the other side surface of the substrate. The coil case includes another side portion of the coil case covering at least a portion of the other side surface of the substrate. A connector insertion hole is formed on the other side of the coil housing. As for the substrate deformation suppression unit, When the connector is inserted into the connector insertion hole, the other end of the connector does not protrude to the outside from the other side of the coil case.

5. The sealed pump according to claim 2, characterized in that: A substrate cooling unit is further provided, the substrate cooling unit utilizing ventilation to cool the substrate, The base plate is suspended on the other side of the bobbin housing. The coil housing has another side portion of the coil housing that covers at least a part of the other side of the substrate, and a side portion of the coil housing that stands up from the periphery of the other side portion of the coil housing. There is a coil other side space defined by the first wall portion, the second wall portion, the substrate, and the coil, and a substrate accommodation space defined by the substrate and the coil housing. The substrate cooling unit provides a vent port communicating with the substrate accommodation space in at least one of the other side portion of the coil housing and the side portion of the coil housing, and provides a ventilation unit communicating in the radial direction between the other side of each of the first wall portion and the second wall portion and the substrate, so that the coil other side space and the substrate accommodation space are always in communication.

6. The sealed pump according to claim 5, wherein The ventilation unit has a plurality of wall slits penetrating in the radial direction at the other end portions of the first wall portion and the second wall portion.

7. The sealed pump according to claim 6, wherein The ventilation unit has a separation slit formed by separating the other side surface of either the first wall portion or the second wall portion from the substrate.

8. The sealed pump according to claim 5, wherein The bobbin housing main body is provided on the outer side in the radial direction of the second wall portion, and the other side surface has a plurality of protruding portions that directly abut against the substrate in the axial direction. The ventilation unit has a plurality of wall slits penetrating in the radial direction at the other end portions of the protruding portions, and the other side surfaces of the first wall portion and the second wall portion respectively have separation slits formed by separating from the substrate.

9. A cooling device, characterized in that It includes the sealed pump according to any one of claims 1 to 8.

Images