CN219612209U - Cabinet and inverter - Google Patents

Abstract

The utility model discloses a case and an inverter, wherein the case is used for accommodating a first electric component and a second electric component; the case comprises a case body, a heat dissipation piece and a heat conduction piece; the box body comprises a first panel and a second panel which are opposite to each other and perpendicular to the first direction, an inner cavity suitable for accommodating a first electric component and a second electric component is formed between the first panel and the second panel, the first electric component is attached to the first panel, and the second electric component is far away from the first panel and faces the second panel; the heat dissipation piece is arranged on the outer side of the first panel to dissipate heat of the first panel; the heat conducting piece is arranged on the inner side of the second panel and is suitable for abutting against the second electrical component to conduct heat of the second electrical component to the second panel. The inverter adopts the chassis. The chassis and the inverter device have small volume, and realize good heat dissipation of all electric components under the condition that the power inductor needs to be placed in the chassis.

Description

Cabinet and inverter

Technical Field

The utility model relates to the field of inverter devices, in particular to a chassis and an inverter device.

Background

In the existing low-power inverter, a cabinet with a natural heat dissipation mode is generally adopted in consideration of the reasons of compact internal space, device protection and the like, namely, an integrated or assembled radiator is arranged at the back of the cabinet, a plate and a power device are arranged in the cabinet, and a part of power inductor is sometimes arranged at the back of the cabinet in a form of a potting box body.

However, in most cases, the power inductor still needs to be placed inside the chassis, especially considering the integral requirement of the radiator (including the requirement of the radiator manufacturing cost, the integral heat dissipation area of the radiator, and the like), so that the back of the chassis is not suitable for placing the power inductor. Therefore, the power inductor occupies more space in the case, so that the accommodating space of the plate and the device in the case is compressed, and higher requirements are placed on layout, wiring and heat dissipation.

Disclosure of Invention

The utility model aims to overcome the defects or problems in the prior art and provide a chassis and an inverter device, which realize good heat dissipation of all electric components under the condition that a power inductor needs to be placed in the chassis.

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

according to the first technical scheme, the chassis is used for accommodating a first electric component and a second electric component; the chassis comprises: the box body comprises a first panel and a second panel which are opposite to each other and perpendicular to the first direction, an inner cavity suitable for accommodating a first electric component and a second electric component is formed between the first panel and the second panel, the first electric component is attached to the first panel, and the second electric component is close to the second panel; the heat dissipation piece is arranged on the outer side of the first panel to dissipate heat of the first panel; and a heat conducting member provided inside the second panel and adapted to abut against the second electrical component to conduct heat of the second electrical component to the second panel.

Based on the first technical scheme, the heat dissipation part is provided with a plurality of heat dissipation teeth protruding on the outer surface of the first panel, the tooth height direction of the heat dissipation teeth is a first direction, each heat dissipation tooth extends along a second direction and is distributed at intervals along a third direction, and the first direction, the second direction and the third direction are orthogonal; the heat conducting piece is a grid-shaped heat radiating structure protruding on the inner surface of the second panel along the first direction, the grid-shaped heat radiating structure comprises a plurality of first heat radiating strips extending along the second direction and a plurality of second heat radiating strips extending along the third direction, the first heat radiating strips are distributed at intervals along the third direction, the second heat radiating strips are distributed at intervals along the second direction, the first heat radiating strips are intersected with the second heat radiating strips, and at least one intersection point is thicker than other intersection points.

Based on the second technical scheme, a third technical scheme is further provided, in the third technical scheme, the inner cavity is provided with an opening arranged along the first direction, the first panel forms the bottom wall of the inner cavity, and the second panel is detachably covered on the opening of the inner cavity; the heat dissipation piece and the first panel are integrally formed, and the heat conduction piece and the second panel are integrally formed.

The fourth technical scheme of the utility model provides an inverter device at the same time, comprising the chassis according to any one of the first to third technical schemes, and a first electric component, a second electric component, a power inductor, a first PCB and a second PCB which are accommodated in the chassis; the power inductor is attached to the first panel, the first PCB board avoiding power inductor is arranged on the first panel in an erected mode, and the first electric component is arranged between the first panel and the first PCB board and is attached to the first panel; the second PCB is arranged on the first PCB, and the second electrical component is arranged on the second PCB and is abutted against the heat conducting piece; the first electrical component generates a greater amount of heat than the second electrical component.

Based on the fourth technical scheme, a fifth technical scheme is further provided, in the fifth technical scheme, the first electrical component is a power switch tube, and the second electrical component comprises a filter capacitor and/or an output relay of the output filter unit; a projection of the second electrical component on the first panel along the first direction is proximate to the power inductance.

Based on the fifth technical scheme, a sixth technical scheme is further provided, in the sixth technical scheme, the second electrical component comprises a filter capacitor of the output filter unit and an output relay, and the height of the output relay is lower than that of the filter capacitor; the heat conducting piece comprises a first heat conducting piece and a second heat conducting piece, and the first heat conducting piece and the second heat conducting piece are respectively abutted against the surfaces of the output relay and the filter capacitor, which face the second panel; the first heat conducting piece and the second heat conducting piece are grid-shaped heat radiating structures protruding to the inner surface of the second panel along the first direction, the grid-shaped heat radiating structures comprise a plurality of first heat radiating strips extending along the second direction and a plurality of second heat radiating strips extending along the third direction, which are staggered to form a plurality of heat radiating grids, the first heat radiating strips are distributed at intervals along the third direction, the second heat radiating strips are distributed at intervals along the second direction, the first heat radiating strips are intersected with the second heat radiating strips, and the first direction, the second direction and the third direction are orthogonal; the four crossing points in the first heat conducting member have a thickened columnar structure as compared with other crossing points; the second electrical component includes four of the output relays, each having a vertex angle corresponding to one of the columnar structure positions in the first direction.

Based on the technical scheme six, a technical scheme seven is further arranged, and the heat-conducting rubber cushion is further included in the technical scheme seven; the heat-conducting rubber pad is clamped between the second electrical component and the heat-conducting piece.

Based on the seventh technical scheme, a eighth technical scheme is further provided, in the eighth technical scheme, the heat-conducting rubber pad is a unidirectional heat-conducting silica gel pad, and the unidirectional heat-conducting silica gel pad is provided with a first heat-conducting surface and a second heat-conducting surface which are away from each other; the first heat conducting surface is abutted against the second electric component, and the second heat conducting surface is abutted against the heat conducting piece; the heat conduction direction of the heat conduction rubber pad is from the first heat conduction surface to the second heat conduction surface.

Based on the seventh technical scheme, a ninth technical scheme is further provided, in the ninth technical scheme, the heat-conducting rubber pad comprises a first heat-conducting rubber pad corresponding to the four output relays and a second heat-conducting rubber pad corresponding to the filter capacitor respectively; the first heat conduction rubber cushion is clamped between the four output relays and the second panel, and the second heat conduction rubber cushion is clamped between the filter capacitor and the second panel; the first heat-conducting rubber pad and the second heat-conducting rubber pad are respectively provided with a first heat-conducting surface and a second heat-conducting surface which are away from each other, and the first heat-conducting surface is abutted against the second electrical component; the thickness of each heat conducting rubber pad is configured such that the heat conducting rubber pad is compressed along the first direction when in abutting engagement with the heat conducting member, and such that at least part of the heat conducting rubber pads on the second heat conducting surface enter the corresponding heat dissipating grid to abut against at least part of the inner wall of the heat dissipating grid.

Based on the technical scheme nine, a technical scheme ten is further provided, wherein in the technical scheme ten, the part of the heat-conducting rubber pad entering each heat dissipation grid is defined as a heat-conducting rubber pad protrusion; the output relay and the filter capacitor are both provided with a cube structure, are both arranged on the second PCB board, and are provided with a heat conduction surface facing the second panel and a plurality of natural convection surfaces perpendicular to the heat conduction surface; the first heat generated by each second electric component is transferred to the second panel through the heat conducting surface, the first heat conducting surface, the heat conducting rubber pad protrusions and the heat radiating grid in sequence in a heat conduction mode, and the second heat generated by each second electric component is transferred to each panel of the box body through each natural convection surface in a natural convection mode; wherein the first heat is at least 9 times the second heat.

From the above description of the present utility model, compared with the prior art, the present utility model has the following advantages:

1. in the first technical scheme, the first electric component and the second electric component are distributed along the first direction, the first electric component is attached to the first panel, the second electric component is close to the second panel (namely far away from the first panel), heat of the first electric component can be conducted to the heat dissipation element through the first panel so as to be dissipated outwards, heat of the second electric component can be conducted to the second panel through the heat conduction element so as to be dissipated outwards, the heat conduction element is abutted against the second electric component, and the heat conduction element can be abutted against the second electric component directly or indirectly through a material with high heat conductivity. The arrangement fully utilizes the depth space of the box body, realizes the heat dissipation of the first electric component and the second electric component on the basis that the box body has a smaller volume, and the double-layer arrangement of the first electric component and the second electric component is convenient for the wiring of the first electric component and the second electric component; in addition, the structure can meet certain heat dissipation requirements of the second electric component, and enough space can be reserved for other devices such as power inductors, so that all power inductors of the low-power inverter adopting the structure can be arranged in a case, and the integrated requirements of a back radiator (namely a heat dissipation piece of the structure) of the inverter are met. That is, by adopting the technical scheme, the power inductor is reasonable in layout, and good heat dissipation of all electric components can be realized on the basis of a small volume under the condition that the power inductor needs to be placed in the chassis.

2. In the second technical scheme, the radiating piece is a plurality of radiating teeth protruding on the outer surface of the first panel, the tooth height direction of the radiating teeth is the first direction, namely the first panel forms the substrate of the radiating teeth, so that heat conducted to the first panel by the first electrical component can be well radiated outwards, and the radiating efficiency is high.

In addition, the heat conducting piece is a grid-shaped heat radiating structure protruding from the inner surface of the second panel along the first direction, so that the heat conducting piece is fully contacted with the second electric component, and the weight of the whole chassis is reduced; the thickened columnar structure has a certain reinforcing rib effect, so that the structure of the heat conducting piece is stable; and when the heat conducting piece contacts with the second electric component, the thickened columnar structure enables the contact area of the heat conducting piece when the heat conducting piece abuts against the second electric component to be larger and smoother.

3. In the third technical scheme, the first panel forms the bottom wall of the inner cavity, and the second panel is detachably covered on the opening of the inner cavity, so that the first electric component and the second electric component can be maintained conveniently.

In addition, the heat dissipation piece and the first panel integrated into one piece, heat conduction piece and second panel integrated into one piece for first panel is the base plate of heat dissipation tooth promptly, and the second panel is the base plate of first heat dissipation strip and second heat dissipation strip promptly, and thermal conductivity is good, and the radiating efficiency is higher.

4. In a fourth technical scheme, the utility model also provides an inverter device which comprises the chassis in the technical scheme, has the same technical advantages as the technical scheme, wherein the second electric component is arranged in a double-layer manner with the first electric component through the second PCB arranged on the first PCB, and the inverter device is simple in structure, easy to install, convenient to wire connection operation and reasonable in layout. In addition, as described above, since the chassis has the above structure, more power inductors can be accommodated in the chassis, and the integrated requirement of the heat dissipation element of the low-power inverter is achieved. On the other hand, the heating value of the first electric component is larger than that of the second electric component, namely, the electric component with large heating value is directly attached to the first panel and is radiated by the radiating piece, and the electric component with small heating value is radiated by the second panel through the heat conducting piece, so that the overall heat design is also reasonable.

5. In the fifth technical scheme, the first electrical component is a power switch tube, the second electrical component is a filter capacitor and/or an output relay of the output filter unit, in practical application, the second PCB can be an output board of the whole inverter, the output relay and the output filter unit are arranged on the output board, and the two devices have certain heat dissipation requirements and can be satisfied by heat dissipation of the heat conducting piece, so that the power inverter is reasonable in layout and convenient to wire. In addition, according to the actual layout in the chassis, each power inductor is usually placed in a centralized manner, so that according to the thermal simulation condition, the heat conducting piece or the heat conducting piece with large heat conducting area can be correspondingly configured for the second electric component close to the power inductor, and the electric component far away from the power inductor on the second PCB can not be correspondingly configured with the heat conducting piece or the heat conducting piece with small heat conducting area, thereby reducing the cost under the condition of meeting the heat dissipation requirement of each device on the second PCB, and enabling the layout to be more flexible.

6. In the sixth technical scheme, two heat conducting pieces are respectively abutted to the filter capacitor and the surface of the output relay towards the second panel, so that the filter capacitor with large heating value in the output filter unit and the heat of the relay can be well dissipated, and the stable operation of the inverter is ensured.

In addition, the first heat conducting piece corresponding to the four output relays is provided with four thickened columnar structures, each output relay is provided with a vertex angle corresponding to the columnar structure, so that the vertex angle with the highest heating value or highest intensity of the output relay can be corresponding to the columnar structure, the heat conducting effect and the supporting effect of the output relay are improved, and the heat conducting piece is prevented from being crushed when being abutted against the relay.

7. In the seventh technical scheme, the setting of heat conduction cushion is convenient for filter capacitor's heat conduction to heat conduction spare, and when heat conduction spare was latticed heat radiation structure, because heat conduction cushion is softer, not only can guarantee the abundant contact heat conduction of heat conduction spare and second electrical component, can offset assembly or manufacturing error in the first direction, can also play steady butt in addition, transport absorbing effect.

8. In the eighth technical scheme, the heat-conducting rubber pad is a unidirectional heat-conducting silica gel pad, so that the influence on the heat dissipation effect of the heat-conducting silica gel pad caused by the fact that external heat is reversely transferred to a second electric component through the second panel when the ambient temperature is high can be avoided.

9. In the ninth technical scheme, the thickness of the heat-conducting rubber pad is configured, so that the heat-conducting rubber pad is compressed when the heat-conducting piece and the second electric component are matched, the heat-conducting area can be greatly increased, the height of the heat-conducting piece can be reduced to a certain extent, and the manufacturing cost of the heat-conducting piece is further reduced.

10. In the ten technical schemes, through forming the heat conduction cushion protruding when the cooperation, increase is through heat conduction mode radiating first heat, and then reduce its second heat to outer radiating through the convection mode, prevent that its radiating heat from influencing other devices.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the description of the embodiments below are briefly introduced, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a cross-sectional view of a chassis along a second direction according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of a chassis along a third direction according to an embodiment of the present utility model;

fig. 3 is a schematic diagram of a second panel and a heat conducting member according to the novel embodiment.

The main reference numerals illustrate:

a case 10; a first panel 11; a second panel 12; a heat sink 20; heat dissipation teeth 21; a heat conductive member 30; a first heat radiation bar 31; a second heat sink bar 32; a columnar structure 33; a first electrical component 40; a second electrical component 50; an output relay 51; a filter capacitor 52; a power inductor 60; a first PCB 71; a second PCB board 72; a thermal pad 80; a first thermal pad 81; a first thermal pad 82.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It is to be understood that the described embodiments are preferred embodiments of the utility model and should not be taken as excluding other embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without creative efforts, are within the protection scope of the present utility model.

In the claims, specification and drawings hereof, unless explicitly defined otherwise, the terms "first," "second," or "third," etc. are used for distinguishing between different objects and not for describing a particular sequential order.

In the claims, specification and drawings of the present utility model, unless explicitly defined otherwise, references to orientation or positional relationship such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc. are based on the orientation and positional relationship shown in the drawings and are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or element referred to must have a particular orientation or be constructed and operated in a particular orientation, nor should it be construed as limiting the particular scope of the utility model.

In the claims, specification and drawings of the present utility model, unless explicitly defined otherwise, the term "fixedly connected" or "fixedly connected" should be construed broadly, i.e. any connection between them without a displacement relationship or a relative rotation relationship, that is to say includes non-detachably fixedly connected, integrally connected and fixedly connected by other means or elements.

In the claims, specification and drawings of the present utility model, the terms "comprising," having, "and variations thereof as used herein, are intended to be" including but not limited to.

Referring to fig. 1-3, fig. 1-3 illustrate a chassis for housing a first electrical component 40 and a second electrical component 50, the first electrical component 40 and the second electrical component 50 being arranged in a first direction.

The cabinet includes a cabinet body 10, a heat dissipation member 20, and a heat conduction member 30.

The case 10 has a rectangular parallelepiped shape, a height direction thereof is a first direction, a length direction thereof is a second direction, and a width direction thereof is a third direction, that is, the first direction, the second direction, and the third direction are orthogonal. The box 10 includes a first panel 11 and a second panel 12 parallel to each other and opposite to each other, the first panel 11 and the second panel 12 are perpendicular to the first direction, the box 10 forms an inner cavity between the first panel 11 and the second panel 12 suitable for accommodating the first electrical component 40 and the second electrical component 50, in a specific implementation, the box 10 is provided with an accommodating groove opened along the first direction, the first panel 11 forms a groove bottom wall of the accommodating groove, the second panel 12 detachably covers an opening of the accommodating groove, and the second panel 12 forms an inner cavity when covering an opening of the accommodating groove. In other words, the cavity has an opening arranged in the first direction, the first panel 11 forms a bottom wall of the cavity, and the second panel 12 detachably covers the opening provided in the cavity.

The first electrical component 40 is attached to the first panel 11, and the second electrical component 50 is close to the second panel 12 (i.e. far away from the first panel 11) and faces the second panel 12, in this embodiment, the first electrical component 40 and the second electrical component 50 are arranged in a double-layer manner so as to make full use of the depth space of the box 10, and facilitate wiring.

The heat sink 20 is provided outside the first panel 11 to radiate heat to the first panel 11. In this embodiment, the heat dissipation element 20 is a plurality of heat dissipation teeth 21 protruding from the outer surface of the first panel 11, the tooth height direction of the heat dissipation teeth 21 is a first direction, and the heat dissipation teeth 21 extend along a second direction and are arranged at intervals along a third direction. In particular implementation, the heat dissipation element 20 and the first panel 11 are integrally formed, that is, the first panel 11 forms the substrate of the heat dissipation teeth 21, so that the heat conducted to the first panel 11 by the first electrical component 40 can be well dissipated outwards, and the heat dissipation efficiency is high.

The heat conducting member 30 is disposed on the inner side of the second panel 12, and may be specifically formed integrally with the second panel 12, and is adapted to abut against the second electrical component 50 to conduct heat of the second electrical component 50 to the second panel 12, and it should be understood that the heat conducting member 30 abuts against the second electrical component 50, either directly against the second electrical component 50 or indirectly against the second electrical component 50 through a high-performance heat conducting material. In this embodiment, the heat conducting member 30 includes a first heat conducting member and a second heat conducting member, both of which are grid-shaped heat dissipating structures protruding from the inner surface of the second panel 12 along the first direction, and each of the grid-shaped heat dissipating structures includes a plurality of first heat dissipating strips 31 extending along the second direction and a plurality of second heat dissipating strips 32 extending along the third direction, each of the first heat dissipating strips 31 is arranged at intervals along the third direction, each of the second heat dissipating strips 32 is arranged at intervals along the second direction, and four cross points in the first heat conducting member have thickened columnar structures 33 compared with other cross points. In fig. 3, the four columnar structures 33 are located in a rectangle smaller than the area of the heat conductive member 30 and close to the edge of the heat conductive member 30. The grid-shaped heat dissipation structure ensures sufficient contact with the second electrical component 50 and reduces the weight of the whole chassis, wherein the columnar structures 33 have a certain reinforcing rib effect, so that the structure of the heat conduction member 30 is stable, and when the heat conduction member 30 contacts with the second electrical component 50, the contact area of the heat conduction member 30 when the heat conduction member 30 abuts against the second electrical component 50 is large and stable due to the four columnar structures 33.

It can be known that, by adopting the technical solution, the second electrical component 50 and the first electrical component 40 are arranged along the first direction, the first electrical component 40 is attached to the first panel 11, the second electrical component 50 is suspended in the first panel 11 and faces the second panel 12, the heat of the electrical component can be conducted to the heat dissipation element 20 through the first panel 11 so as to be dissipated outwards, the heat of the second electrical component 50 can be conducted to the second panel 12 through the heat conduction element 30 so as to be dissipated outwards, the arrangement fully utilizes the depth space of the box 10, the heat dissipation of the first electrical component 40 and the second electrical component 50 is realized on the basis that the box 10 has a smaller occupied area, and the double-layer arrangement of the first electrical component 40 and the second electrical component 50 is convenient for the connection of the first electrical component 40 and the second electrical component 50, in addition, the structure can leave enough space for other devices such as the power inductor 60, so that the power inductor 60 can be attached to the first panel 11, and the first panel 11 bears more stable and firm due to the larger weight of the power inductor 60; that is, by adopting the technical scheme, the layout is reasonable, and good heat dissipation of each electrical component can be realized on the basis of small volume under the condition that the power inductor 60 needs to be placed in the chassis. The second panel 12 is detachably covered on the opening of the accommodating groove, so that the first electrical component 40 and the second electrical component 50 can be maintained conveniently.

The present utility model also provides an inverter device, still referring to fig. 1-3, where the inverter device includes the chassis in the above embodiment and the first electrical component 40, the second electrical component 50, the power inductor 60, the first PCB 71 and the second PCB 72 accommodated in the chassis; the power inductor 60 is attached to the first panel 11, the first PCB 71 is away from the power inductor 60, the power inductor 60 is arranged on the first panel 11 in a supporting mode, and the first electric component 40 is arranged between the first panel 11 and the first PCB 71 and is attached to the first panel 11; the second PCB 72 is mounted on the first PCB 71, and the second electrical component 50 is disposed on the second PCB 72 and abuts against the heat conductive member 30.

In the present embodiment, the heat generation amount of the first electric component 40 is larger than the heat generation amount of the second electric component 50. Specifically, the first electrical component 40 is a power switch tube, the second electrical component 50 is a filter capacitor 52 and an output relay 51 of the output filter unit, in practical application, the second PCB board 72 may be an output board of the whole inverter, the output relay and the output filter unit are directly connected with an output end of the inverter, the layout is reasonable, the wiring is convenient, the power switch tube, the output relay and the output filter unit all belong to conventional electrical components of the inverter, the connection relationship thereof also belongs to the prior art, and the embodiment is not described herein.

In this embodiment, the projection of the second electrical component 50 on the first panel 11 in the first direction is close to the power inductor 60. Therefore, according to the thermal simulation situation, the heat conducting member 30 or the heat conducting member 30 with large heat conducting area can be correspondingly configured for the second electric component 50 close to the power inductor 60, while the electric component far away from the power inductor 60 on the second PCB 72 can not be correspondingly configured with the heat conducting member or the heat conducting member with small heat conducting area, thereby reducing the cost and enabling the layout to be more flexible under the condition of meeting the heat dissipation requirement of each device on the second PCB 72.

In addition, in the present embodiment, the second electrical component includes four output relays 51, and each output relay 51 has a vertex angle corresponding to one columnar structure 33 in the first direction, so that the vertex angle with the highest heat generation amount or highest strength of the output relay 51 can be corresponding to the columnar structure 33, the heat conduction effect and the supporting effect thereof can be increased, and the heat conduction member is prevented from being crushed when being abutted against the relay.

The number of the heat conducting pieces 30 is two, namely, the first heat conducting piece and the second heat conducting piece, which are respectively abutted against the upper surface of the output relay 51 and the upper surface of the filter capacitor 52, so that the heat of the filter capacitor 52 with large heating value on the output board and the heat of the output relay 51 can be well dissipated, the stable operation of the inverter device is ensured, and the height of the output relay 51 is lower than that of the filter capacitor 52, and the extended height of the second heat conducting piece abutted against the filter capacitor 52 is smaller than that of the first heat conducting piece abutted against the output relay 51.

The thermal conductive rubber pad 80 is sandwiched between the thermal conductive member 30 and the filter capacitor 52, and in practical application, the thermal conductive rubber pad 80 is adhered to the second electrical component 50. The setting of heat conduction cushion 80 is convenient for the heat conduction of second electrical component 50 to corresponding heat conduction spare 30, and when heat conduction spare 30 is grid form heat radiation structure, because heat conduction cushion 80 is softer, not only can guarantee the abundant contact heat conduction of heat conduction spare 30 and second electrical component 50, can offset assembly or manufacturing error in the first direction, can also play steady butt in addition, transportation shock attenuation's effect.

Preferably, the thermal pad 80 is a unidirectional thermal pad having a first thermal conductive surface and a second thermal conductive surface. The first heat conducting surface abuts against the second electrical component 50, and the second heat conducting surface abuts against the heat conducting member 30. The heat conducting direction of the heat conducting rubber pad 80 is from the first heat conducting surface to the second heat conducting surface, so that the influence of the external heat on the heat radiating effect of the second electric component caused by the reverse transmission of the external heat to the second panel when the ambient temperature is high can be avoided.

Further, the heat conductive rubber pad 80 includes a first heat conductive rubber pad 81 corresponding to the four output relays 51 and a second heat conductive rubber pad 82 corresponding to the filter capacitor 52, respectively. The first heat-conducting rubber pad 81 is sandwiched between the four output relays 51 and the second panel 12, and the second heat-conducting rubber pad 82 is sandwiched between the filter capacitor 52 and the second panel 12. The first heat-conducting rubber pad 81 and the second heat-conducting rubber pad 82 are respectively provided with a first heat-conducting surface and a second heat-conducting surface which are away from each other, and the first heat-conducting surface is abutted against the second electric component 50. The thickness of each thermal pad 80 is configured such that the thermal pad 80 is compressed in a first direction when in abutting engagement with the thermal conductive member 30 and such that at least a portion of the thermal pad on the second thermal conductive surface enters the corresponding heat dissipating grid to abut at least a portion of the inner wall of the heat dissipating grid. In this embodiment, the configuration to heat conduction cushion thickness for the heat conduction cushion is compressed when heat conduction spare and second electrical component are joined in marriage, not only can increase the heat conduction area by a wide margin, can also reduce the height of heat conduction spare to a certain extent and then reduce its manufacturing cost.

Specifically, the portion of the thermal pad 80 that enters each heat dissipation grid is defined as a thermal pad protrusion. The output relay 51 and the filter capacitor 52 each have a cubic configuration, which are seated on the second PCB board 72, and have a heat conduction surface toward the second panel 12 and a plurality of natural convection surfaces perpendicular to the heat conduction surface. The first heat generated by each second electrical component 50 is transferred to the second panel through the heat conduction surface, the first heat conduction surface, the heat conduction rubber pad protrusions and the heat dissipation grid in sequence, and the second heat generated by each second electrical component 50 is transferred to each panel of the box body through the natural convection mode through the natural convection surface. Wherein the first heat is at least 9 times the second heat. In this embodiment, through forming the heat conduction cushion arch when the cooperation, increase second electrical component 50 is through radiating first heat of heat conduction mode, and then reduce its second heat to outer radiating through the convection mode, prevent that its radiating heat from influencing other devices.

In this embodiment, the inverter has the technical advantages identical to those of the above embodiment, and will not be described here again, the second electrical component 50 is configured to be double-layer with the first electrical component 40 by the second PCB 72 that is erected on the first PCB 71, and the inverter is simple in structure, easy to install, convenient for wiring operation, and reasonable in layout.

The foregoing description of the embodiments and description is presented to illustrate the scope of the utility model, but is not to be construed as limiting the scope of the utility model. Modifications, equivalents, and other improvements to the embodiments of the utility model or portions of the features disclosed herein, as may occur to persons skilled in the art upon use of the utility model or the teachings of the embodiments, are intended to be included within the scope of the utility model, as may be desired by persons skilled in the art from a logical analysis, reasoning, or limited testing, in combination with the common general knowledge and/or knowledge of the prior art.

Claims (10)

1. A chassis for housing a first electrical component (40) and a second electrical component (50); the machine case is characterized by comprising:

a case (10) including a first panel (11) and a second panel (12) opposite to each other and perpendicular to a first direction, the case (10) forming an inner cavity between the first panel (11) and the second panel (12) adapted to house a first electrical component (40) and a second electrical component (50), the first electrical component (40) being attached to the first panel (11), the second electrical component (50) being adjacent to the second panel (12);

a heat sink (20) provided outside the first panel (11) to dissipate heat from the first panel (11); and

and a heat conducting member (30) provided on the inner side of the second panel (12) and adapted to abut against the second electrical component (50) to conduct heat of the second electrical component (50) to the second panel (12).

2. A cabinet according to claim 1, wherein: the heat dissipation part (20) is provided with a plurality of heat dissipation teeth (21) protruding on the outer surface of the first panel (11), the tooth height direction of the heat dissipation teeth (21) is a first direction, each heat dissipation tooth (21) extends along a second direction and is distributed at intervals along a third direction, and the first direction, the second direction and the third direction are orthogonal;

the heat conducting piece (30) is a grid-shaped heat radiating structure protruding on the inner surface of the second panel (12) along the first direction, the grid-shaped heat radiating structure comprises a plurality of first heat radiating strips (31) extending along the second direction and a plurality of second heat radiating strips (32) extending along the third direction, the first heat radiating strips (31) are distributed at intervals along the third direction, the second heat radiating strips (32) are distributed at intervals along the second direction, the first heat radiating strips (31) are intersected with the second heat radiating strips (32), and at least one intersection point is provided with a thickened columnar structure (33) compared with other intersection points.

3. A casing according to claim 1, wherein the cavity has an opening arranged in a first direction, the first panel (11) forming a bottom wall of the cavity, the second panel (12) being removably arranged to cover the opening of the cavity;

the heat dissipation piece (20) and the first panel (11) are integrally formed, and the heat conduction piece (30) and the second panel (12) are integrally formed.

4. An inverter device, characterized by comprising the chassis according to any one of claims 1-3 and a first electrical component (40), a second electrical component (50), a power inductor (60), a first PCB board (71) and a second PCB board (72) accommodated in the chassis;

the power inductor (60) is attached to the first panel (11), the first PCB (71) is away from the power inductor (60) and is erected on the first panel (11), and the first electric component (40) is arranged between the first panel (11) and the first PCB (71) and is attached to the first panel (11);

the second PCB (72) is erected on the first PCB (71), and the second electrical component (50) is arranged on the second PCB (72) and is abutted against the heat conducting piece (30); the first electrical component (40) generates a greater amount of heat than the second electrical component (50).

5. An inverter device according to claim 4, wherein the first electrical component (40) is a power switching tube and the second electrical component (50) comprises a filter capacitor (52) and/or an output relay (51) of an output filter unit; a projection of the second electrical component (50) on the first panel (11) along the first direction is close to the power inductance (60).

6. An inverter device according to claim 5, wherein the second electrical component (50) comprises a filter capacitor (52) of the output filter unit and an output relay (51), the output relay (51) having a height lower than the filter capacitor (52); the heat conducting piece (30) comprises a first heat conducting piece and a second heat conducting piece, and the first heat conducting piece and the second heat conducting piece are respectively abutted against the surfaces of the output relay (51) and the filter capacitor (52) facing the second panel (12);

the first heat conducting piece and the second heat conducting piece are grid-shaped heat dissipation structures protruding on the inner surface of the second panel (12) along a first direction, the grid-shaped heat dissipation structures comprise a plurality of first heat dissipation strips (31) extending along a second direction and a plurality of second heat dissipation strips (32) extending along a third direction, which are staggered with each other to form a plurality of heat dissipation grids, the first heat dissipation strips (31) are distributed at intervals along the third direction, the second heat dissipation strips (32) are distributed at intervals along the second direction, the first heat dissipation strips (31) are intersected with the second heat dissipation strips (32), and the first direction, the second direction and the third direction are orthogonal; four crossing points in the first heat conducting member have a thickened columnar structure (33) compared to other crossing points;

the second electrical component comprises four output relays (51), each output relay (51) having an apex angle corresponding to the position of one of the columnar structures (33) in the first direction.

7. An inverter device as claimed in claim 6, further comprising a thermal pad (80); the heat-conducting rubber pad (80) is clamped between the second electrical component (50) and the heat-conducting piece (30).

8. An inverter device according to claim 7, wherein the thermal pad (80) is a unidirectional thermal pad having a first thermal conductive surface and a second thermal conductive surface facing away from each other; the first heat conducting surface is abutted against the second electric component (50), and the second heat conducting surface is abutted against the heat conducting member (30); the heat conduction direction of the heat conduction rubber pad (80) is from the first heat conduction surface to the second heat conduction surface.

9. An inverter device according to claim 7, wherein said thermal pad (80) comprises a first thermal pad (81) corresponding to each of said four output relays (51) and a second thermal pad (82) corresponding to said filter capacitor (52);

the first heat-conducting rubber pads (81) are clamped between the four output relays (51) and the second panel (12), and the second heat-conducting rubber pads (82) are clamped between the filter capacitor (52) and the second panel (12); the first heat-conducting rubber pad (81) and the second heat-conducting rubber pad (82) are respectively provided with a first heat-conducting surface and a second heat-conducting surface which are away from each other, and the first heat-conducting surfaces are abutted against the second electric component (50);

the thickness of each heat conducting rubber pad (80) is configured such that the heat conducting rubber pad (80) is compressed along the first direction when in abutting engagement with the heat conducting member (30), and such that at least part of the heat conducting rubber pads on the second heat conducting surface enter the corresponding heat dissipating grid to abut against at least part of the inner wall of the heat dissipating grid.

10. An inverter device according to claim 9, wherein the portions of said thermal pad (80) that enter each of said heat dissipating grids are defined as thermal pad protrusions;

the output relay (51) and the filter capacitor (52) are of a cube structure, are arranged on the second PCB (72) in a sitting mode, and are provided with a heat conduction surface facing the second panel (12) and a plurality of natural convection surfaces perpendicular to the heat conduction surface;

the first heat generated by each second electric component (50) is sequentially transferred to the second panel through the heat conducting surface, the first heat conducting surface, the heat conducting rubber pad protrusions and the heat radiating grid in a heat conduction mode, and the second heat generated by each second electric component (50) is transferred to each panel of the box body through each natural convection surface in a natural convection mode; wherein the first heat is at least 9 times the second heat.