Charger

Abstract

The utility model provides a charger, which includes: a printed circuit board assembly installed in a shell, and a centrifugal fan, the centrifugal fan has a radial air outlet; a guide cover installed in the shell, having a guide surface facing the radial air outlet, and the shell is provided with an exhaust port, the exhaust port facing the guide surface. The charger of this embodiment adopts a centrifugal fan, and the hot air flow generated by the operation of the printed circuit board assembly flows in along the axial direction of the centrifugal fan, and is thrown to the radial outer edge under the action of centrifugal force and discharged from the radial air outlet. At this time, the hot air flows through the guide surface of the guide cover to the exhaust port and is discharged outside the shell of the charger. Compared with axial flow fans, centrifugal fans can bring a larger air volume, so that the charger has better heat dissipation performance. At the same time, when rainwater enters the shell from the exhaust port, it can also be discharged from the exhaust port to the outside, so that the charger of this embodiment has both heat dissipation, exhaust and waterproof performance.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy, in particular to a charger. Background Art

[0002] The charger uses high-frequency power supply technology and advanced intelligent dynamic adjustment charging technology. The charger uses a microprocessor as the processing control center, burns complex hardware simulation circuits into the microprocessor, and controls the power supply operation in the form of software programs. Among them, the microprocessor and its hardware simulation circuits and other devices are deployed on a printed circuit board PCB (Printed circuit board) to obtain a printed circuit board assembly PCBA (Printed Circuit Board Assembly).

[0003] When charging, the PCBA in the charger generates heat, so how to dissipate heat is a problem that the charger needs to solve.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Utility Model Content

[0005] In view of the problems in the prior art, the purpose of the present invention is to provide a charger to improve the heat dissipation performance of the charger.

[0006] The present disclosure provides a charger, which includes:

[0007] case;

[0008] a printed circuit board assembly installed in the housing, and a centrifugal fan located between the housing and the printed circuit board assembly, the centrifugal fan having a radial air outlet;

[0009] The air guide cover installed in the shell has a guide surface facing the radial air outlet, a first end abutting against the centrifugal fan casing and a second end abutting against the inner wall of the shell. The shell is provided with an exhaust port facing the guide surface.

[0010] In some embodiments, the guide surface is a concave surface.

[0011] In some embodiments, the guide surface extends from the first end and ends at the second end, so that the distance from the guide surface to the inner wall of the shell gradually decreases.

[0012] In some embodiments, along the direction from the first end to the second end, the guide surface is divided into a first section, a second section and a third section;

[0013] The second section has a first inclination angle compared to the first section, so that the second section is inclined toward the radial air outlet compared to the first section;

[0014] The third section has a second inclination angle compared to the second section, so that the third section is inclined toward the radial air outlet compared to the second section.

[0015] In some embodiments, the air outlet is disposed at a position where the shell is connected to the second end.

[0016] In some embodiments, a lower edge of the air outlet is flush with the second end.

[0017] In some embodiments, the exhaust port is configured to be in the shape of a fence distributed along the height wind direction of the shell.

[0018] In some embodiments, the second end of the air deflector is connected to the shell via a connector.

[0019] In some embodiments, the connector is a self-tapping screw.

[0020] In some embodiments, sealant is filled between the second end and the housing.

[0021] In some embodiments, at least one of the two opposite surfaces of the second end and the shell is provided with a glue groove, and the sealant is filled in the glue groove.

[0022] The charger of the utility model has the following advantages:

[0023] The charger of this embodiment adopts a centrifugal fan. The hot air flow generated by the operation of the printed circuit board assembly flows in along the axial direction of the centrifugal fan, and is thrown to the radial outer edge under the action of centrifugal force and discharged from the radial air outlet. At this time, the hot air flows through the guide surface of the guide cover to the exhaust port and is discharged outside the charger housing. Compared with axial flow fans, centrifugal fans can bring a larger air volume, so that the charger has better heat dissipation performance. At the same time, when rainwater enters the housing from the exhaust port, it can also be discharged from the exhaust port, so that the charger of this embodiment has both heat dissipation, exhaust and waterproof performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Other features, objectives and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings.

[0025] Figure 1 A cross-sectional view showing a charger provided by an embodiment of the present disclosure;

[0026] Figure 2A side view of a charger provided by an embodiment of the present disclosure is shown.

[0027] Reference numerals:

[0028] 1 case 1a Exhaust vent 3 Printed Circuit Assemblies 4 Centrifugal fan 4a Radial air outlet 41 Wind blade 40 chassis 5 Air deflector 50 Guide surface 51 Paragraph 1 52 Paragraph 2 53 Paragraph 3 6 Connectors 7 Sealant 5a First End 5b Second end DETAILED DESCRIPTION

[0029] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the present invention will be more comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0030] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0031] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0032] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0033] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0034] In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meaning and cannot be understood as limiting the scope of protection of this application. In addition, although the terms used in this application are selected from well-known and commonly used terms, some terms mentioned in the specification of this application may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this article. In addition, it is required to understand this application not only by the actual terms used, but also by the meaning implied by each term.

[0035] It should be understood that when a component is referred to as being “on another component,” “connected to another component,” “coupled to another component,” or “contacting another component,” it can be directly on, connected to, coupled to, or contacting the other component, or intervening components may be present. In contrast, when a component is referred to as being “directly on another component,” “directly connected to,” “directly coupled to,” or “directly contacting” another component, there are no intervening components present.

[0036] In addition, the accompanying drawings are only schematic illustrations of the present invention and are not necessarily drawn to scale. The same reference numerals in the drawings represent the same or similar parts, and thus their repeated description will be omitted.

[0037] In the related art, the charger uses an axial flow fan for heat dissipation. Axial flow fans are sometimes also called propeller fans, whose inclined blades are mounted on a rotating shaft (or shaft) driven by a motor. The operating principle of an axial flow fan is to suck air from one end along the axial direction and then force it out from the other end in a direction parallel to the axis.

[0038] The disclosed embodiment provides an improved charger, in which a centrifugal fan is used to dissipate heat and cool a printed circuit board assembly, so as to enhance the heat dissipation and provide a waterproof function.

[0039] like Figure 1 As shown, the charger provided by the embodiment of the present disclosure may include:

[0040] Shell 1;

[0041] A printed circuit board assembly 3 installed in the housing 1, and a centrifugal fan 4 located between the housing 1 and the printed circuit board assembly 3, wherein the centrifugal fan 4 has a radial air outlet 4a;

[0042] The air guide cover 5 installed in the housing 2 has a guide surface 50 facing the radial air outlet 4a, a first end 5a abutting against the casing 40 of the centrifugal fan 4, and a second end 5b abutting against the inner wall of the housing 1. The housing 1 is provided with an exhaust port 1a (such as Figure 2 As shown), the air outlet 1a faces the flow guide surface 50.

[0043] Different from the related art, the charger of this embodiment adopts a centrifugal fan 4. The hot air flow generated by the operation of the printed circuit board assembly 3 flows into the rotating blades 41 of the centrifugal fan 4 along the axial direction, and is thrown to the outer edge of the blades 41 under the action of centrifugal force, and is discharged from the radial air outlet 4a. At this time, the hot air flow flows to the exhaust port 1a through the guide surface 50 of the air guide cover 5 and is discharged outside the housing 1 of the charger.

[0044] Compared with the axial flow fan, the centrifugal fan 4 can bring a larger air volume, so that the charger has better heat dissipation performance. At the same time, when rainwater enters the housing 1 from the exhaust port 1a, it can also be discharged from the exhaust port 1a, so that the charger of this embodiment has both heat dissipation and exhaust and waterproof performance.

[0045] Among them, the charger can be an on-board charger for electric vehicles, and can also be a fixed charger.

[0046] In the embodiments of the present disclosure, Figure 1 As shown, the centrifugal fan 4 is axially arranged opposite to the printed circuit board assembly 3 to receive the hot air flow. The centrifugal fan 4 is fixedly mounted to the charger housing 1 through its housing 40, and the radial air outlet 4a is located below the centrifugal fan 4 as shown in the figure.

[0047] In a further embodiment, the air guide cover 5 is substantially located below the centrifugal fan 4, and the air guide surface 50 is located in the downwind channel of the radial air outlet to guide the hot air flow to flow toward the air outlet 1a and be discharged.

[0048] Specifically, the air duct 5 has a first end 5a abutting against the casing 40 of the centrifugal fan 4 and a second end 5b abutting against the inner wall of the housing 1. The air duct 5 can be connected to the casing 40 through the first end 5a, and can also be fixedly connected to the housing 1 through the second end 5b. Therefore, the air duct 5 can be connected to at least one of the casing 40 and the housing 1.

[0049] As an implementation method, the second end 5b of the air deflector 5 is connected to the housing 1 via a connector 6. At this time, the air deflector 5 and the housing 1 are assembled in a split type, and the air deflector 5 can use standard parts, so as to facilitate assembly and replacement.

[0050] As an implementable manner, the connector 6 may use a self-tapping screw. A self-tapping screw is a screw that can tap threads by itself without drilling holes first, and can be used to install the air duct 5 and the housing 1 from the outside.

[0051] In another embodiment, the connector 6 may also use a rivet and a nut-bolt assembly, which may be selected according to the installation environment and is not limited here.

[0052] When the connecting piece 6 is used, a sealant 7 is filled between the second end 5 b of the air deflector 5 and the housing 1 . The sealant 7 plays a good sealing role and prevents rainwater from flowing downward and remaining in the housing 1 .

[0053] In one embodiment, at least one of the two opposite surfaces of the second end 5b and the shell 1 is provided with a glue groove (which is filled with sealant 7 and is invisible in the figure), and the sealant 7 is filled in the glue groove. The glue groove is U-shaped, which increases the sealing surface of the sealant 7, which not only improves the stability of the sealant 7, but also improves the sealing effect.

[0054] In the embodiment of the present disclosure, the guide surface 50 is concave as a whole, which can better gather heat and enhance the outward exhaust performance.

[0055] like Figure 1 As shown, along the direction from the first end 5a to the second end 5b, the guide surface 50 is divided into a first section 51, a second section 52 and a third section 53;

[0056] The second section 52 has a first inclination angle α compared to the first section 51, so that the second section 52 is inclined toward the radial air outlet 4a compared to the first section 51;

[0057] The third section 53 has a second inclination angle β compared to the second section 52 , so that the third section 53 is inclined toward the radial air outlet 4 a compared to the second section 52 .

[0058] In this way, the guide surface 50 is inclined in sections from the first end 5a to the second end 5b, so that rainwater can gradually flow downward along the guide surface to be discharged out of the shell 1 as quickly as possible.

[0059] In one embodiment, the first section 51 is parallel to the inner wall of the housing 1, and may also have a certain inclination angle compared to the inner wall of the housing 1, which is not limited here. The relationship between α and β is not limited and can be adjusted as needed.

[0060] In an optional embodiment, β makes an acute angle between the third section 53 and the inner wall of the shell 1, that is, the second end 5b is lower than the connection position between the third section 53 and the second section 52, which can guide the water to flow out smoothly.

[0061] In another embodiment of the present disclosure, the guide surface extends from the first end and ends at the second end, so that the distance from the guide surface to the inner wall of the shell gradually decreases. In this case, the guide surface is designed as an arc-shaped ramp so that it can extend from the first end to the second end without interruption.

[0062] In the embodiments of the present disclosure, Figure 1 As shown, the air outlet 1a is arranged at the position where the shell 1 is connected to the second end 5b, so that rainwater entering the shell 1 from the air outlet 1a can flow out from the air outlet 1a in time, thereby enhancing the waterproof performance of the charger.

[0063] In a further embodiment, the lower edge of the air outlet 1a is flush with the second end 5b.

[0064] For example Figure 2 As shown, the air outlet 1a is arranged in a fence shape distributed along the height and wind direction of the housing 1, so that the fence opening at the bottom of the air outlet 1a is flush with the second end 5b.

[0065] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A charger, characterized in that: include: Housing (1); A printed circuit board assembly (3) installed in the housing (1), and a centrifugal fan (4) located between the housing (1) and the printed circuit board assembly (3), wherein the centrifugal fan (4) has a radial air outlet (4a); A flow guide cover (5) installed in the housing (1) comprises a flow guide surface (50) facing the radial air outlet (4a), a first end (5a) abutting against the casing (40) of the centrifugal fan (4), and a second end (5b) abutting against the inner wall of the housing (1); the housing (1) is provided with an air outlet (1a), and the air outlet (1a) faces the flow guide surface (50).

2. The charger according to claim 1, characterized in that: The flow guiding surface (50) is a concave surface.

3. The charger according to claim 2, characterized in that: The guide surface (50) extends from the first end (5a) and ends at the second end (5b), such that the distance from the guide surface (50) to the inner wall of the shell (1) gradually decreases.

4. The charger according to claim 2, characterized in that: Along the direction from the first end (5a) to the second end (5b), the guide surface (50) is divided into a first section (51), a second section (52) and a third section (53); The second section (52) has a first inclination angle compared to the first section (51), so that the second section (52) is inclined toward the radial air outlet (4a) compared to the first section (51); The third section (53) has a second inclination angle compared to the second section (52), so that the third section (53) is inclined toward the radial air outlet (4a) compared to the second section (52).

5. The charger according to claim 1, characterized in that: The air outlet (1a) is arranged at a position where the shell (1) is connected to the second end (5b).

6. The charger according to claim 5, characterized in that: The lower edge of the air outlet (1a) is flush with the second end (5b).

7. The charger according to claim 1, characterized in that: The air outlet (1a) is arranged in a fence shape distributed along the height wind direction of the housing (1).

8. The charger according to claim 1, characterized in that: The second end (5b) of the air deflector (5) is connected to the housing (1) via a connecting piece (6).

9. The charger according to claim 8, characterized in that: The connecting piece (6) is a self-tapping screw.

10. The charger according to claim 8, characterized in that: A sealant (7) is filled between the second end (5b) and the housing (1).

11. The charger according to claim 10, characterized in that: At least one of the two opposing surfaces of the second end (5b) and the shell (1) is provided with a glue groove, and the sealing glue (7) is filled in the glue groove.

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