CN215815497U - Encapsulated inductor - Google Patents

Abstract

The utility model discloses a potting type inductor which comprises a shell, an inductor body, a heat dissipation filling unit and potting adhesive, wherein the shell comprises a cavity with an opening, the inductor body is arranged in the cavity of the shell, the heat dissipation filling unit comprises at least one heat dissipation filling block, the at least one heat dissipation filling block is respectively filled in a gap position between the inductor body and the cavity of the shell, and the potting adhesive is potted into the cavity from the opening of the cavity to fill the cavity. The encapsulation type inductor provided by the utility model has a good heat dissipation effect.

Description

Encapsulated inductor

Technical Field

The utility model relates to the technical field of inductors, in particular to an encapsulated inductor.

Background

With the development of scientific technology, the application of inductance in circuits is becoming more and more common, inductance is an indispensable part of most power electronic devices, and the form of the inductor is diversified. There are a lot of adoption encapsulation formula inductances in the existing market, and present encapsulation formula inductance often has the not good scheduling problem of radiating effect, and the not good one side of radiating effect probably leads to the easy bulging of encapsulating of product to influence the installation, and on the other hand also has not good influence to the circuit.

The above background disclosure is only for the purpose of assisting understanding of the concept and technical solution of the present invention and does not necessarily belong to the prior art of the present patent application, and should not be used for evaluating the novelty and inventive step of the present application in the case that there is no clear evidence that the above content is disclosed at the filing date of the present patent application.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problems, the present invention provides an encapsulated inductor with good heat dissipation effect.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model discloses a potting type inductor which comprises a shell, an inductor body, a heat dissipation filling unit and potting adhesive, wherein the shell comprises a cavity with an opening, the inductor body is arranged in the cavity of the shell, the heat dissipation filling unit comprises at least one heat dissipation filling block, the at least one heat dissipation filling block is respectively filled in a gap position between the inductor body and the cavity of the shell, and the potting adhesive is potted into the cavity from the opening of the cavity to fill the cavity.

Preferably, the at least one heat dissipation filling block is respectively shaped to be capable of being simultaneously tightly attached to the inductor body and the preset position of the housing, and the preset position of the housing refers to the cavity side wall of the housing and/or the cavity opening of the housing.

Preferably, the at least one heat dissipation filling block is made of a ceramic material.

Preferably, a heat sink is disposed in the middle of the bottom of the cavity of the housing, and the heat sink extends upward from the bottom of the cavity of the housing to be inserted into the gap at the lower end of the inductor body.

Preferably, the heat sink is integrally formed with the housing.

Preferably, a plurality of heat dissipation teeth are respectively arranged on the periphery and the bottom of the outer side of the shell.

Preferably, the inductance body includes coil, terminal, iron core center pillar, iron core upper cover, iron core lower cover, insulating skeleton and two insulating barrier, the terminal is connected on the coil, the iron core center pillar set up in the insulating skeleton, insulating skeleton set up in the centre bore of coil, two insulating barrier set up respectively in the axial both ends of the centre bore of coil, the iron core upper cover with the iron core lower cover sets up respectively in two insulating barrier's the outside, two be equipped with the hole on the insulating barrier respectively so that two are worn out respectively at the axial both ends of iron core center pillar the insulating barrier and respectively with the iron core upper cover with the iron core lower cover bonds together.

Preferably, a plurality of positioning columns are respectively arranged on the outer sides of the two insulating partition plates, the plurality of positioning columns are respectively connected and arranged on the outer side surfaces of the insulating partition plates, and the plurality of positioning columns extend outwards from the outer side surfaces of the insulating partition plates along the outer edges of the iron core upper cover and the iron core lower cover.

Preferably, the end part of each positioning column is connected with a stop block, the stop block is perpendicular to the length direction of the positioning column, and the height of the positioning column is greater than or equal to the thickness of the iron core upper cover and the thickness of the iron core lower cover.

Preferably, flanges extending outwards from the outer side surface of the insulating partition are further arranged among the positioning columns, and the height of each flange is smaller than or equal to that of each positioning column.

Compared with the prior art, the utility model has the beneficial effects that: according to the encapsulation inductor disclosed by the utility model, the heat dissipation filling block is filled in the gap position between the inductor body and the cavity of the shell, so that the problem of poor heat dissipation effect of the existing encapsulation inductor can be effectively solved, the thermal expansion coefficient of the heat dissipation filling block is smaller than that of the encapsulation adhesive, and the problems of abnormal installation, cracking of an iron core and the like caused by overlarge expansion of the encapsulation adhesive at high temperature can be effectively solved after filling.

In a further scheme, the radiating fins are arranged in the middle of the bottom of the cavity of the shell, so that the heat in the middle of the inductor body can be effectively transferred to the outside; furthermore, heat dissipation teeth are distributed on the periphery of the shell according to the product structure, so that the temperature is further reduced.

In a further scheme, the design of the insulating partition plate is convenient for the assembly and the positioning of the iron core center post and the iron core upper and lower covers, the size of a gap between the iron core upper and lower covers and the shell can be effectively controlled, and no insulating tape or insulating paper is required to be added outside the coil for isolation.

Drawings

Fig. 1 is a schematic structural diagram of an encapsulated inductor according to a preferred embodiment of the present invention;

fig. 2 is an exploded view of the encapsulated inductor of fig. 1;

fig. 3 is a schematic view of the structure of the insulating spacer in fig. 2.

Detailed Description

The embodiments of the present invention will be described in detail below. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the utility model or its application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. In addition, the connection may be for either a fixed function or a circuit/signal communication function.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the embodiments of the present invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be in any way limiting of the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

As shown in fig. 1 and fig. 2, a preferred embodiment of the present invention discloses a potting inductor, which includes a housing 10, an inductor body 20, a heat dissipation filling unit 30, and a potting adhesive (not shown), where the housing 10 includes a cavity 11 having an opening, the inductor body 20 is disposed in the cavity 11 of the housing 10, the heat dissipation filling unit 30 includes a plurality of heat dissipation filling blocks 31, the plurality of heat dissipation filling blocks 31 are respectively filled in gaps between the inductor body 20 and an inner wall of the cavity 11 of the housing 10, and the potting adhesive is filled into the cavity 11 from the opening of the cavity 11 to fill the cavity 11.

The plurality of heat dissipation filling blocks 31 are respectively shaped to be capable of being simultaneously tightly attached to the inductor body 20 and the predetermined position of the housing 10, where the predetermined position of the housing 10 refers to a sidewall of the cavity 11 of the housing 10 or an opening of the cavity 11 of the housing 10. In the present embodiment, the heat dissipation filling block 31 is made of ceramic, and the shape of the heat dissipation filling block 31 should be as close to the coil 21 and the housing 10 of the inductor body 20 as possible (specifically, the shape of the contact surface 311 between the heat dissipation filling block 31 and the coil 21 should be as consistent as possible with the shape of the outer surface of the coil 21 to ensure that the heat dissipation filling block 31 is in good contact with the coil 21, and the contact surface 312 between the heat dissipation filling block 31 and the housing 10 should be as close as possible to the inner wall of the cavity 11 of the housing 10 or the opening of the cavity 11); the periphery of the coil 21 is provided with a radian and a plurality of gaps are reserved, so that the heat of the coil 21 is difficult to dissipate through the shell 10, and the heat dissipation filling block 31 has high heat conduction capability, so that the consumption of heat conduction pouring sealant is saved and the temperature of a product is reduced after filling; the thermal expansion coefficient of the heat dissipation filling block 31 is much smaller than that of the pouring sealant, and the problems of abnormal installation, iron core cracking and the like caused by excessive glue expansion at high temperature are effectively solved after filling.

The shell 10 is used for installing the inductor body 20 and embedding the pouring sealant; the shell 10 is made of aluminum or copper, has high heat conductivity, is provided with radiating teeth 13 at the periphery, and has the internal shape consistent with that of the inductor body 20 as much as possible; the middle temperature of the coil of the inductor body 20 is high, and the heat sink 12 is arranged in the middle of the shell 10 and inserted into the middle of the coil, which is helpful for reducing the middle temperature of the coil. Specifically, the heat sink 12 disposed in the middle of the bottom of the cavity 11 of the housing 10 extends upward from the bottom of the cavity 11 of the housing 10 to be inserted into the gap at the lower end of the inductor body 20. In the present embodiment, the heat sink 12 is integrally formed with the housing 10, that is, the heat sink 12 is also an aluminum sheet or a copper sheet. One heat dissipation filling block 31 can be placed on each side of the heat dissipation plate 12, so that the temperature of the middle coil of the inductor body 20 can be effectively reduced through the heat dissipation filling blocks 31 and the heat dissipation plate 12. The outside of shell 10 is equipped with a plurality of heat dissipation teeth 13 respectively all around and bottom, and heat dissipation tooth 13 can adopt aluminum hull or copper shell, and the thickness of heat dissipation tooth 13, length, the clearance between every piece can be designed according to the demand of product, and heat dissipation tooth 13 can increase the heat radiating area of product effectively, reduce temperature.

The inductor body 20 comprises a coil 21, a terminal 22, an iron core center pillar 23, an iron core upper cover 24, an iron core lower cover 25, an insulating framework 26 and two insulating partition plates 27; wherein, the coil 21 is generally formed by winding a copper wire or an aluminum wire, and the wound coil 21 is to be mounted on the insulating framework 26; the terminal 22 is generally a copper terminal, or an aluminum terminal, or a copper-aluminum clad terminal, the terminal 22 is connected with the incoming and outgoing wires of the coil 21 by welding (argon arc welding, laser welding) or screws, and the like, and the terminal 22 needs to be perforated or riveted with a nut, so that the wiring of a user is facilitated; the iron core central pillars 23 can be generally cylindrical, elliptical or square (chamfered) according to design requirements, and can be formed by one or more than one iron core central pillars 23 in a bonding manner, and an insulating gasket is allowed to be added between each iron core central pillar 23; the iron core upper cover 24 and the iron core lower cover 25 are respectively matched with the iron core center pillar 23 for use, and are respectively bonded at two axial ends of the iron core center pillar 23 by using epoxy glue, and the general shape of the iron core upper cover and the iron core lower cover is oval or square; the insulating framework 26 is made of insulating materials, such as insulating paper, plastic, nylon, and the like, and is used for placing the iron core center pillar 23 to facilitate positioning and bonding of the iron core center pillar 23, and is disposed in the center hole of the coil 21 together with the iron core center pillar 23 to isolate the iron core center pillar 23 from the coil 21; the insulating partition plate 27 is used for separating the iron core upper cover 24 and the iron core lower cover 25 from the coil 21 respectively, and the peripheral dimension of the insulating partition plate 27 is larger than that of the coil 21 and is used for separating the coil 21 from the shell 10; and a positioning column 271 is arranged on the insulating partition 27 and used for fixing the iron core center pillar 23, the iron core upper cover 24 and the iron core lower cover 25, and simultaneously ensuring the gap between the iron core upper cover 24 and the iron core lower cover 25 and the shell 10, so as to ensure the safety distance.

Specifically, referring to fig. 3, the core upper cover 24 and the core lower cover 25 are respectively disposed outside the two insulating partitions 27, and the two insulating partitions 27 are respectively provided with a hole 273 so that the two axial ends of the core center pillar 23 respectively penetrate through the two insulating partitions 27 and are respectively bonded to the core upper cover 24 and the core lower cover 25, and the hole 273 can be used for fixing and positioning the core center pillar 23. A plurality of positioning columns 271 are respectively arranged on the outer sides of the two insulating partition plates 27, the plurality of positioning columns 271 are respectively connected and arranged on the outer side surfaces of the insulating partition plates 27, and the plurality of positioning columns 271 extend outwards from the outer side surfaces of the insulating partition plates 27 along the outer edges of the iron core upper cover 24 and the iron core lower cover 25; in a further embodiment, a flange 274 extending outward from the outer side surface of the insulating partition 27 is further provided between the plurality of positioning posts 271, the flange 274 is not higher than the positioning posts 271, the inner wall of the flange 274 is provided along the side walls of the core upper cover 24 and the core lower cover 25, and the flange 274 is provided at the lower half portions of the core upper cover 24 and the core lower cover 25 so that the core upper cover 24 and the core lower cover 25 can be inserted from above to below into the fixing and positioning portion composed of the plurality of positioning posts 271 and the flange 274. The end parts of the positioning columns 271 are respectively connected with a stop 272, the stop 272 is perpendicular to the length direction of the positioning columns 271, and the height of the positioning columns 271 is larger than or equal to the thickness of the iron core upper cover 24 and the iron core lower cover 25. The thickness of the stopper 272 is the gap between the core upper cover 24 or the core lower cover 25 and the housing 10, so as to realize the insulation between the core upper cover 24 or the core lower cover 25 and the housing 10.

The encapsulation inductor disclosed by the preferred embodiment of the utility model has the following advantages:

(1) the plurality of iron core center pillars 23, the iron core upper cover 24 and the iron core lower cover 25 can be quickly and reliably mounted together through the insulating partition plates 27 and the insulating framework 26;

(2) the safety distance between the product and the shell 10 is effectively ensured through the insulating partition plate 27 and the insulating framework 26, and no insulating tape or insulating paper is required to be added outside the coil 21 for isolation;

(3) the highest temperature of the product is generally in the middle of the coil 21, and the middle radiating fin 12 is designed in the shell 10 of the scheme, so that the temperature in the middle of the coil 21 can be effectively reduced;

(4) the surface of the shell 10 is provided with a plurality of radiating teeth 13, so that the radiating area of the product is greatly increased, the volume and the temperature of the inductor body 20 can be reduced, and the cost is reduced;

(5) in the existing encapsulation type inductor, a large gap exists between the coil 21 and the shell 10, so that heat dissipation is affected; the ceramic heat dissipation filling block 31 with high heat conductivity coefficient is used in the scheme, so that the using amount of pouring sealant can be reduced, the heat dissipation capacity of a product is improved, and the temperature is reduced; because the coefficient of expansion of casting glue is big, when not using ceramic heat dissipation filling block 31, the inside casting glue's of shell 10 distribution is inhomogeneous, and middle gluey volume is many, and stress is unbalanced during the high temperature, can lead to iron core center pillar 23 spalling, and middle part glue can bulge and influence the installation.

(6) The shape, size and number of the heat dissipation filling blocks 31 are designed to fit the coil 21 and the shell 10, so that the temperature of the product is effectively reduced, and the reliability of the product is improved.

The background of the utility model may contain background information related to the problem or environment of the present invention rather than the prior art described by others. Accordingly, the inclusion in the background section is not an admission of prior art by the applicant.

The foregoing is a more detailed description of the utility model in connection with specific/preferred embodiments and is not intended to limit the practice of the utility model to those descriptions. It will be apparent to those skilled in the art that various substitutions and modifications can be made to the described embodiments without departing from the spirit of the utility model, and these substitutions and modifications should be considered to fall within the scope of the utility model. In the description herein, references to the description of the term "one embodiment," "some embodiments," "preferred embodiments," "an example," "a specific example," or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. Although embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the scope of the utility model as defined by the appended claims.

Claims (10)

1. The utility model provides a potting formula inductance, its characterized in that, includes shell, inductance body, heat dissipation filling unit and casting glue, the shell includes a cavity that has the open-ended, the inductance body set up in the cavity of shell, heat dissipation filling unit includes at least one heat dissipation filling block, at least one heat dissipation filling block is filled respectively the inductance body with clearance position department between the cavity of shell, the casting glue is followed the opening part of cavity to in the cavity embedment is in order with the cavity is full of.

2. The encapsulated inductor according to claim 1, wherein the at least one heat dissipation filling block is shaped to be able to be attached to the inductor body and the housing at a predetermined position, respectively, and the predetermined position of the housing is a cavity sidewall of the housing and/or a cavity opening of the housing.

3. The encapsulated inductor as recited in claim 1, wherein said at least one heat dissipating filler block is made of a ceramic material.

4. The potted inductor of claim 1, wherein the bottom of the cavity of the housing is provided with a heat sink in the middle, the heat sink extending upward from the bottom of the cavity of the housing to be inserted into the gap at the lower end of the inductor body.

5. The encapsulated inductor of claim 4, wherein said heat sink is integrally formed with said housing.

6. The encapsulated inductor as recited in claim 1, wherein a plurality of heat dissipation teeth are disposed around and at the bottom of the outer side of the housing.

7. The encapsulated inductor according to any one of claims 1 to 6, wherein the inductor body comprises a coil, a terminal, a central core column, an upper core cover, a lower core cover, an insulating framework and two insulating partition plates, the terminal is connected to the coil, the central core column is arranged in the insulating framework, the insulating framework is arranged in the central hole of the coil, the two insulating partition plates are respectively arranged at two axial ends of the central hole of the coil, the upper core cover and the lower core cover are respectively arranged at the outer sides of the two insulating partition plates, and the two insulating partition plates are respectively provided with a hole so that the two axial ends of the central core column respectively penetrate through the two insulating partition plates and are respectively bonded with the upper core cover and the lower core cover.

8. The encapsulated inductor as claimed in claim 7, wherein a plurality of positioning posts are respectively disposed on the outer sides of the two insulating partition plates, the plurality of positioning posts are respectively connected to the outer side surfaces of the insulating partition plates, and the plurality of positioning posts extend along the outer edges of the core upper cover and the core lower cover from the outer side surfaces of the insulating partition plates to the outside.

9. The potted inductor according to claim 8, wherein a stopper is connected to an end of each of the positioning posts, the stopper is perpendicular to a length direction of the positioning post, and a height of the positioning post is greater than or equal to a thickness of the upper iron core cover and a thickness of the lower iron core cover.

10. The encapsulated inductor as recited in claim 8, wherein a flange extending outwardly from an outer surface of the insulating spacer is disposed between the positioning posts, and a height of the flange is less than or equal to a height of the positioning posts.

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