WO2011068053A1

WO2011068053A1 - Pump and liquid supply apparatus

Info

Publication number: WO2011068053A1
Application number: PCT/JP2010/070788
Authority: WO
Inventors: 孝文関
Original assignee: パナソニック電工株式会社
Priority date: 2009-12-04
Filing date: 2010-11-22
Publication date: 2011-06-09
Also published as: EP2508761A1; EP2508761B1; EP2508761A4; JP2011117378A

Abstract

A pump (P) is provided with a holding unit (6) that holds a first conductive wire (20a), which supplies power to a control unit (C) that controls drive of a motor (M), and a plurality of second conductive wires (20b) that transmit control signals. The holding unit (6) has: a first hole (70b) having the first conductive wire (20a) inserted therein, and a plurality of second holes (70a) having the second conductive wires (20b) inserted therein, said first hole and second holes being arranged in parallel; and an insulating section (75) provided between the first hole (70b) and a second hole (70a) adjacent to the first hole (70b). The distance between the first hole (70b) and the second hole (70a) adjacent to the first hole (70b), and the distance between the second holes (70a) are different from each other.

Description

Pump and liquid supply device

The present invention relates to a pump and a liquid supply apparatus equipped with the pump, and more particularly to an insulating structure of a conductive wire connected to a control unit of the pump.

Patent Document 1 discloses a structure in which a plurality of conductors arranged in parallel are partitioned by a lid member (upper holding part) having an interphase barrier (insulating part) as an insulating structure of conductors connected to a control unit of a control center. is doing.

In Patent Document 1, a partition wall is erected from the mating terminal portion bottom surface (lower holding portion), and the front end of the interphase barrier overlaps each conductive wire in a fitting groove formed in the partition wall. Thus, a predetermined insulation distance is secured.

Japanese Utility Model Publication No. 61-83272

The plurality of conductors connected to the control unit include a first conductor that supplies power and a plurality of second conductors that send control signals. In this case, since the amount of current flowing through the first conductor that normally supplies power to the second conductor that sends the control signal is large, the insulation distance between the first conductor and the second conductor is It is necessary to make it sufficiently larger than the insulation distance between the second conductors.

However, if the conductors are arranged in parallel at equal intervals as in the related insulation structure, it is impossible to secure an insulation distance between the first conductor that supplies power and the second conductor that sends a control signal. There was a problem.

The present invention provides a highly safe pump in which an insulation distance between a first conducting wire for supplying power and a second conducting wire for sending a control signal is sufficiently secured, and a liquid supply apparatus equipped with the pump. Objective.

A first aspect of the present invention is a motor unit including a pump unit that sucks and discharges liquid, a rotatable rotor having a magnet, and a stator having a hollow stator core in which a coil is disposed and opposed to the magnet. A controller that drives the motor unit by controlling energization of the coil, a first conductor that supplies power to the controller, and a plurality of second conductors that send control signals A first hole for inserting the first conductor and a plurality of second holes for inserting the plurality of second conductors, arranged in parallel, and An insulating portion provided between the first hole and a second hole adjacent to the first hole, the first hole and the first hole; A distance between a second hole adjacent to the plurality of holes and the plurality of holes And summarized in that the distance each other the second hole is different from the pump.

According to the first aspect, the plurality of hole portions for inserting the first and second conductive wires into the holding portion are arranged in parallel, the first hole portion for inserting the first conductive wire, and the second conductive wire. An insulating portion is provided between the second hole portion into which the first hole is inserted. And because the distance between the first hole and the second hole adjacent to the first hole is made different from the distance between the second holes, these holes are It is possible to increase the distance between the first conductor and the second conductor with respect to the distance between the second conductors inserted into the portion, and a high safety is ensured with a sufficient insulation distance. A pump can be provided.

Further, the first hole portion may be located at one end of the first and second hole portions in the parallel arrangement direction.

According to the said structure, since the said 1st hole part was arrange | positioned at the parallel direction one end of the 1st and 2nd hole part, compared with the structure which arrange | positions the 1st hole part in the middle, The holding portion may be provided in one place, and the holding portion can be downsized in the parallel direction of the hole portions.

The insulating part may be made of an insulating resin.

According to the said structure, since the insulating part was shape | molded with insulating resin, compared with the case where an insulating part is not comprised with an insulator, the distance between a 1st conducting wire and a 2nd conducting wire can be shortened, and it hold | maintains now. The part can be further downsized in the parallel direction of the hole.

In addition, the holding portion includes an upper holding portion and a lower holding portion that are divided into two parts in the vertical direction and have concave paths in which the first and second holes are formed by being coupled to each other on the opposing surfaces. But you can.

According to the above configuration, the holding portion is vertically divided into two, and the upper holding portion and the lower holding portion provided with the recesses in which the first and second hole portions are formed by being coupled to each other on the opposing surfaces. Since the portion is provided, the insertability of the first and second conducting wires into the first and second hole portions can be improved.

Further, the insulating portion is a virtual image drawn when measuring a creeping distance between the first and second conductors arranged in the first hole and a second hole adjacent to the first hole. You may form so that a line may become curvilinear.

According to the above configuration, an imaginary line drawn when measuring the creepage distance between the first conductor and the second conductor in a state where the first and second conductors are inserted into the first and second holes. Since the insulating portion is formed so as to have a curved shape, the distance between the first hole portion and the second hole portion is the same and the insulating distance is larger than in the configuration in which the imaginary line is linear. Can do.

At the same time, by making the creepage distance between the first conductor and the second conductor curved, the first hole and the second hole with the same creepage distance as compared with the configuration in which the imaginary line is linear. Since the distance between the two can be shortened, the holding portion can be downsized in the parallel direction of the holes.

Further, the insulating part may include a concave part and a convex part that are provided on opposing surfaces of the upper holding part and the lower holding part, and the imaginary line is curved.

According to the above configuration, the imaginary line has a curved shape by providing the insulating portion with the concave portion and the convex portion that are provided on the opposing surfaces of the upper and lower holding portions and engage with each other. Therefore, it is possible to provide a highly safe pump in which an insulation distance between the second conductive wire and the second conductive wire is sufficiently secured.

Further, the stator, the control unit, and the holding unit may be covered with a mold resin.

According to the above configuration, since the stator, the control unit, and the holding unit are covered with the mold resin, the stator, the control unit, and the holding unit can be protected with the mold resin to increase the strength. By sealing the first and second holes, the first conductor and the second conductor can be insulated and the safety of the pump can be further increased.

A second aspect of the present invention is a motor unit including a pump unit that sucks and discharges liquid, a rotatable rotor having a magnet, and a stator having a hollow stator core in which a coil is disposed and opposed to the magnet. A controller that drives the motor unit by controlling energization of the coil, a first conductor that supplies power to the controller, and a plurality of second conductors that send control signals A first hole for inserting the first conductor and a plurality of second holes for inserting the plurality of second conductors, arranged in parallel, and An insulating portion provided between the first hole and a second hole adjacent to the first hole, the first hole and the first hole; A distance between a second hole adjacent to the plurality of holes and the plurality of holes And summarized in that the distance each other the second hole portion is a liquid supply apparatus provided with a different pump.

According to the second aspect, it is possible to obtain a liquid supply device equipped with a pump that exhibits the above-described effects.

FIG. 1 is a cross-sectional view showing a pump according to an embodiment of the present invention. FIG. 2 is a perspective view showing a holding portion according to the embodiment of the present invention. FIG. 3 is an exploded perspective view of the holding portion shown in FIG. FIG. 4 is a diagram illustrating a connection state of the conducting wires of the holding unit illustrated in FIG. 2.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 4 are diagrams showing a pump P according to an embodiment of the present invention.

Referring to FIG. 1, a schematic configuration of the pump P according to the present embodiment will be described. As shown in FIG. 1, the pump P of this embodiment is a pump that uses a motor M as a drive source, and includes a pump case 1, a separation plate 2, an impeller 3, a rotor 4, a stator 5, and a control. And a substrate (control unit) C.

The pump case 1 and the separation plate 2 are coupled to each other, and these form a pair to form a pump chamber 7. A sealing member 8 is provided at a joint portion between the pump case 1 and the separation plate 2 from the viewpoint of securing the water tightness of the pump chamber 7. In the pump chamber 7, the impeller 3 and the rotor 4 are rotatably accommodated in an integrated state. Around the rotor 4, a stator 5 is disposed opposite to the outer side of the separation plate 2, so that a motor configuration of a so-called inner type rotor structure is formed.

The pump case 1 forms a pump chamber 7 together with the separation plate 2, and includes a case main body 11 that defines the pump chamber 7, a suction port 12, and a discharge port 13. The suction port 12 is opened at the center of the top surface of the case body 11 and functions as an opening for sucking liquid into the pump chamber 7. The discharge port 13 is provided on the side wall of the case body 11 and functions as an opening for discharging the liquid in the pump chamber 7.

The separation plate 2 forms a pump chamber 7 together with the pump case 1 and has a function of separating the rotor 4 and the stator 5 in a watertight state (separating the pump portion and the motor portion).

The impeller 3 is integrally attached to the rotor 4 and rotates together with the rotor 4. As the impeller 3 rotates, it sucks liquid from the suction port 12 into the pump chamber 7 and applies centrifugal force to the sucked liquid and discharges it from the discharge port 13 to the outside of the pump P.

The rotor 4 is formed in a cylindrical body, and rotates the impeller 3. The rotor 4 includes a cylindrical rotor body 41 and a plurality of magnets 42 provided on the outer wall (outer peripheral side) of the rotor body 41 and constituting a magnetic circuit (magnetic flux). The pump case 1 is provided with a shaft support portion 43, and the separation plate 6 is provided with a shaft support portion 44, and each end of the fixed shaft 45 is inserted and fitted into the shaft support portion 43 and the shaft support portion 44. Has been. The rotor body 41 is rotatably supported with respect to the fixed shaft 45 via a bearing portion 46. The fixed shaft 45 is made non-rotatable by a pair of detent plates 47 attached to both ends thereof. A gap (clearance) is secured between the magnet 42 and the separation plate 2 so as not to contact when the rotor 4 rotates.

The stator 5 includes an annular hollow stator core 51 having a tooth portion 54 disposed to face the magnet 42, and an annular coil 52 accommodated in the hollow stator core 51 via a coil bobbin 53. As shown in FIG. 1, the coil bobbin 53 has an extending portion 53a extending toward the back side of the separation plate 2, and one end side of the control board C is attached and fixed to the extending portion 53a.

The control board (control unit) C receives a signal from a position detection sensor (not shown) that detects the rotational position of the rotor 4 and controls the current that flows through the annular coil 52. Thereby, the control board C controls the magnetic field generated by the annular coil 52 according to the rotational position of the rotor 4.

Here, the pump P of the present embodiment includes a holding unit 6 that holds a plurality of conductive wires 20 that are electrically connected to the control board C, as will be described in detail later. As shown in FIG. 1, the holding portion 6 is attached and fixed to the control board C, and thereafter, the entire portion excluding the pump case 1 is covered with the mold resin 9. That is, in the pump P, the separation plate 2, the stator 5, the control board C, and the holding unit 6 are covered with the mold resin 9, thereby ensuring strength.

In the pump P configured in this manner, the annular coil 52 is energized by the control board C, and the magnetic field generated by energization of the annular coil 52 is transmitted from the tooth portion 54 of the stator 5 to the magnet 42 of the rotor 4 to be magnetized. When the blade 42 is repelled by suction, the impeller 3 provided integrally with the rotor 4 rotates about the fixed shaft 45. As the impeller 3 rotates, a pumping action is generated, and the liquid is sucked into the pump chamber 7 through the suction port 12, and centrifugal force is applied by the impeller 3 to discharge from the discharge hole 13 to the outside of the pump P. Is done.

Next, with reference to FIG. 2 to FIG. 4, the holding unit 6 which is a characteristic part of the present embodiment will be described in detail.

As shown in FIG. 2, the holding unit 6 of the present embodiment is a resin molded product in which a plurality of holes 70 for holding a plurality of conductive wires 20 connected to the control board C are arranged in parallel.

The plurality of conductors 20 inserted into the holding unit 20 include a first conductor 20a (see FIG. 4) that supplies power to the control board C and a plurality of second conductors 20b that send control signals. Yes. In the pump P of the present embodiment, it is assumed that a current 10 times or more flows through the first conductor 20a that supplies power to the second conductor 20b that sends the control signal. It is necessary to secure the safety of the pump P by insulating the conductive wire 20a and the second conductive wire 20b.

Therefore, in the present embodiment, the insulating portion 75 is interposed between the first hole portion 70b into which the first conducting wire 20a of the holding portion 6 is inserted and the second hole portion 70a into which the second conducting wire 20b is inserted. Is provided. Thereby, the distance between the 1st hole part 70b and the 2nd hole part 70a differs from the distance of the 2nd hole part 70a arrange | positioned adjacently.

That is, in this embodiment, among the five holes 70 arranged in the parallel direction, the holes provided on one end side in the parallel direction (the right side in FIG. 2) are used as the first hole 70b and the remaining four holes. One hole is defined as a second hole portion 70a, and among these four second hole portions 70a, a second hole portion 70a and a first hole portion 70b disposed adjacent to the first hole portion 70b, An insulating portion 75 is provided between the two.

As shown in FIG. 3, such a holding unit 20 includes an upper holding unit 6 </ b> A and a lower holding unit 6 </ b> B that are divided into upper and lower parts.

The upper holding portion 6 </ b> A includes a substantially rectangular base portion 60, four boss protrusions 63 projecting from the back side located at the four corners of the base portion 60, and two notch portions 64 provided at both longitudinal ends of the base portion 60. And. A protrusion 61 is provided in a region where the boss protrusion 63 on the back side of the base 60 is not formed, and the protrusion 61 is provided with a plurality of recesses 62 constituting the first and

second holes

70b and 70a. Yes.

The lower holding portion 6B includes a base portion 65, two side wall portions 66 erected on both ends in the longitudinal direction of the base portion 65, and two notches 64 provided on the upper surface of the side wall portion 66 and engaged with the cutout portions 64 of the upper holding portion 6A. The projection 68, four hole portions 67 that are also provided on the upper surface of the side wall portion 66 and into which the boss projections 63 of the upper holding portion 6A are inserted, are projected from one end of the side wall portion 66 and are fixedly attached to the control board C. Two claw portions 74 are provided. On the front side of the base portion 65, there are provided a plurality of concave passages 69 constituting the first and

second hole portions

70b, 70a, and between the concave passages 69 corresponding to the second hole portion 70a, Ribs 73 are provided to insulate the inserted second conductive wires 20b.

Therefore, in the holding part 6 of the present embodiment, for example, the five conductive wires 20 such as lead wires are electrically connected to the control board C, and the first conductive wire 20a for supplying power is connected to the lower holding part 6B. Are inserted into the recess 69 corresponding to the first hole 70b, and the four second conductors 20b for sending control signals are inserted into the recess 69 corresponding to the second hole 70a of the lower holding portion 6B. Thus, the first and

second conducting wires

20a and 20b can be held by coupling the upper holding portion 6A to the lower holding portion 6B.

When the upper holding portion 6A and the lower holding portion 6B are coupled, the four boss projections 63 of the upper holding portion 6A are engaged with the four hole portions 67 of the lower holding portion 6B, respectively, and the lower holding portion is held. By engaging the two notches 64 of the upper holding part 6A with the two protrusions 68 of the part 6B, the movement of the upper holding part 6A and the lower holding part 6B in the vertical direction and the front-rear direction is restricted. Can be assembled with high accuracy.

As shown in FIG. 3, the insulating part 75 provided between the first hole part 70b and the second hole part 70a is provided on the opposing surfaces of the upper holding part 6A and the lower holding part 6B and is mutually connected. A concave portion 71 and a convex portion 72 to be engaged are provided.

That is, in this embodiment, by engaging the concave portion 71 of the upper holding portion 6A and the convex portion 72 of the lower holding portion 6B, as shown in FIG. 4, the first and

second hole portions

70b, 70a With the first and

second conducting wires

20a and 20b inserted into the imaginary line S, the imaginary line S drawn when measuring the creeping distance between the first conducting wire 20a and the second conducting wire 20b is curved. Yes.

Thus, by forming the insulating part 75 so that the imaginary line S is curved, the first hole 70b is compared with the configuration in which the insulating part is formed so that the imaginary line is linear. The creepage distance between the inserted first conductive wire 20a and the second conductive wire 20b inserted into the second hole 70a can be increased, and the first conductive wire 20a and the second conductive wire 20b. It is possible to obtain a pump with a sufficiently high insulation distance to improve safety.

As described above, in the pump P of the present embodiment, a plurality of hole portions 70 for inserting the first and

second conducting wires

20a and 20b are arranged in parallel in the holding portion 6 and the first conducting wire 20a is inserted. An insulating portion 75 is provided between the first hole portion 70b to be inserted and the second hole portion 70a into which the second conductive wire 20b is inserted. As a result, the distance between the first hole portion 70b and the second hole portion 70a is made different from the distance between the second hole portions 70a, and thus the holes are inserted into these hole portions 70. It is possible to increase the distance between the first conductor 20a and the second conductor 20b with respect to the distance between the second conductors 20b, and a pump that secures a sufficient insulation distance and increases safety. P can be used.

In the present embodiment, since the first hole 70b is arranged at one end in the parallel direction of the first and

second holes

70b and 70a, compared with the configuration in which the first hole 70b is arranged in the middle. Thus, it is only necessary to provide one insulating portion 75, and the holding portion 6 can be downsized in the parallel direction (longitudinal direction) of the first and

second hole portions

70b and 70a.

In the present embodiment, since the insulating portion 75 is formed of an insulating resin, the distance between the first conductive wire 20a and the second conductive wire 20b can be shortened compared to the case where the insulating portion is not formed of an insulator, and the holding portion 6 is The size can be further reduced in the longitudinal direction.

In the present embodiment, the holding portion 6 is divided into two vertically, and the upper side provided with the

recesses

62 and 69 in which the first and

second hole portions

70b and 70a are formed by being coupled to each other on the opposing surfaces. Since the holding portion 6A and the lower holding portion 6B are provided, the insertability of the first and

second conducting wires

20a and 20b into the first and

second hole portions

70b and 70a can be improved.

In the present embodiment, the creepage distance between the first conductor 20a and the second conductor 20b in a state where the first and

second conductors

20a, 20b are inserted into the first and

second holes

70b, 70a. Since the insulating portion 75 is formed so that the imaginary line S drawn when measuring is curved, the space between the first hole portion 70b and the second hole portion 70a is compared with the configuration in which the imaginary line is linear. The distance is the same and the insulation distance can be increased.

On the other hand, by making the creeping distance between the first conducting wire 20a and the second conducting wire 20b curved, the first hole portion 70b and the second conducting portion 70b are formed at the same creeping distance as compared with the configuration in which the virtual line is linear. Since the distance to the hole portion 70a can be shortened, there is an advantage that the holding portion 6 can be downsized in the longitudinal direction.

In the present embodiment, the virtual line S is curved by providing the insulating portion 75 with the concave portion 71 and the convex portion 72 that are provided on the opposing surfaces of the upper and

lower holding portions

6A and 6B and engage with each other. Since it formed in this way, it can be set as the pump P which ensured the insulation distance of the 1st conducting wire 20a and the 2nd conducting wire 20b enough, and improved safety.

In the present embodiment, since the stator 5, the control board C, and the holding part 6 are covered with the mold resin 9, the stator 5, the control board C, and the holding part 6 can be protected with the mold resin 9 to increase the strength. At the same time, the mold resin 9 seals the first and

second holes

70b and 70a of the holding portion 6 to insulate the first conductive wire 20a and the second conductive wire 20b, thereby enhancing the safety of the pump P. It becomes possible to raise more.

As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, A various deformation | transformation is possible. For example, in the above embodiment, the pump using the motor of the inner rotor structure as a drive source has been described as an example. However, the present invention is not limited to this and is a pump using the motor of the outer rotor structure as a drive source. There may be.

The shape of the concave portion and the convex portion for securing the extension distance between the first conductive wire and the second conductive wire is not limited to the above-described embodiment. For example, the semicircular convex portion and the corresponding concave portion, wedge-shaped A convex part and a concave part corresponding to this may be used.

The pump of the above embodiment may be mounted on a liquid supply device used in, for example, a cooling device, a liquid supply device for a fuel cell that conveys a liquid such as methanol, a heat pump device, or the like. If it does so, the liquid supply apparatus with which the safety | security of the pump was improved can be obtained.

Claims

A pump for sucking and discharging liquid;
A motor unit including a rotatable rotor having a magnet and a stator having a hollow stator core in which a coil is disposed and opposed to the magnet;
A control unit that drives the motor unit by controlling energization to the coil;
A first conducting wire that supplies power to the control unit and a holding unit that holds a plurality of second conducting wires that send control signals;
The holding part is
A first hole for inserting the first conductor and a plurality of second holes for inserting the plurality of second conductors, arranged in parallel;
An insulating portion provided between the first hole portion and a second hole portion adjacent to the first hole portion;
A pump in which a distance between the first hole and a second hole adjacent to the first hole is different from a distance between the plurality of second holes.
2. The pump according to claim 1, wherein the first hole is located at one end of the first and second holes in the parallel arrangement direction.
The pump according to claim 1, wherein the insulating portion is made of an insulating resin.
The said holding | maintenance part is divided into 2 parts up and down, The upper side holding part and lower side holding part which have a concave path by which the said 1st and 2nd hole part is formed are mutually couple | bonded with an opposing surface. The pump according to 1.
The insulating portion has an imaginary line drawn when measuring a creeping distance between the first and second conductors arranged in the first hole and a second hole adjacent to the first hole. The pump according to claim 4, wherein the pump is formed in a curved shape.
6. The pump according to claim 5, wherein the insulating portion includes a concave portion and a convex portion which are provided on opposing surfaces of the upper holding portion and the lower holding portion, and the imaginary line is curved.
The pump according to claim 1, wherein the stator, the control unit, and the holding unit are covered with a mold resin.
A pump for sucking and discharging liquid;
A motor unit including a rotatable rotor having a magnet and a stator having a hollow stator core in which a coil is disposed and opposed to the magnet;
A control unit that drives the motor unit by controlling energization to the coil;
A first conducting wire that supplies power to the control unit and a holding unit that holds a plurality of second conducting wires that send control signals;
The holding part is
A first hole for inserting the first conductor and a plurality of second holes for inserting the plurality of second conductors, arranged in parallel;
An insulating portion provided between the first hole portion and a second hole portion adjacent to the first hole portion;
A liquid supply apparatus equipped with a pump in which a distance between the first hole and a second hole adjacent to the first hole is different from a distance between the plurality of second holes.