Fan and cover for fan

Abstract

A fan includes an electric motor and a fan wheel drivable or driven by the electric motor, arranged within its housing. The underside of the housing has an opening for an electric outlet, and a side the housing has a bracket, thereby forming a bushing. An electric line is arranged at least partially at the underside of the housing and is guided through the bushing, and a cover element is arranged at the underside of the housing. The cover element has a first section and a second section. The cover element is arranged at the underside of the housing in such a way that the first section is at least partially arranged in the bushing and clamps the electric line in the bushing while forming a strain relief, and that the second section covers the opening.

Claims

1. A fan comprised: a housing with an underside of the housing, wherein within the housing an electric motor and a fan wheel drivable or driven by the electric motor are arranged; the underside of the housing further configured with a circumferential side, said circumferential side configured parallel to the axis of rotation of the fan wheel; wherein, on the underside of the housing, the housing has an opening for an electric outlet arranged approximately between the axis of rotation of the fan wheel and the circumferential side; wherein, on the circumferential side the housing has a bracket, so that a bushing is formed between the bracket and the circumferential side; wherein, an external electric line is arranged at least partially at the underside of the housing and is guided through the bushing between the bracket and the circumferential side of the housing, to the interior of the underside of the housing, said bushing configured so that the electric line runs via an edge at the bushing from the circumferential side to the interior of underside of the housing; wherein, a cover element is arranged at the underside of the housing, said cover element further comprising a first section and a second section, said first and second sections are arranged at an angle towards each other; and, wherein the cover element is configured at the underside of the housing in such a way that the first section is at least partially disposed in the bushing and clamps the electric line in the bushing while forming a strain relief, and in that the second section covers the opening.

2. The fan according to claim 1, characterized in that a duct is formed between the second section and the underside of the housing, wherein the electric line is arranged in the duct.

3. The fan according to claim 1, characterized in that in an inside of the housing a printed circuit board is arranged, wherein the printed circuit board essentially covers the opening from the direction of an inner side of the housing.

4. The fan according to claim 3, characterized in that the electric outlet is provided, comprising a first part of a plug connection arranged on the printed circuit board, which protrudes through the opening and is covered by the second section, and in that the electric outlet comprises a second part of the plug connection arranged at the end of the electric line, which is in operative connection with the first part.

5. The fan according to claim 1, characterized in that the first section is formed bracket-shaped with two longitudinal bars and one cross bar arranged at the end of the longitudinal bars.

6. The fan according to claim 1, characterized in that the second section has two longitudinal margin bars and one cover plate extending between the margin bars.

7. The fan according to claim 6, characterized in that the second section has a first partial section and a second partial section, wherein a step is formed on an underside of the cover plate between the first partial section and the second partial section.

8. The fan according to claim 7, characterized in that the second part of the plug connection abuts on the step of the second section, so that the second part is prevented from gliding out of the first part.

9. The fan according to claim 7, characterized in that the first partial section has a bulged or arched transition region in the region of the step.

10. The fan according to claim 6, characterized in that the cover plate at least in the second partial section has wing sections which on a top side of the cover element protrude laterally beyond the margin bars, and/or in that an end piece sticks out in the direction of the underside of the cover element at an end of the cover element facing away from the first section.

11. The fan according to claim 6, characterized in that the margin bars each have a latching protrusion at an end facing away from the first section, and in that the latching protrusions at the margin bars engage behind the opening.

12. The fan according to claim 1, characterized in that the cover element consists of an electrically insulating material.

13. The fan according to claim 1, wherein the cover element comprising a first section and a second section is essentially formed L-shaped.

14. The fan according to claim 13, characterized in that the second section has two longitudinal margin bars and one cover plate extending between the margin bars, wherein the second section has a first partial section and a second partial section, wherein a step is formed on an underside of the cover plate between the first partial section and the second partial section.

15. The fan according to claim 14, characterized in that the first partial section has a bulged or arched transition region in the region of the step.

16. The fan according to claim 2, characterized in that the housing in the underside of the housing has a recess which runs in a radial direction, wherein the second section covers the radial recess for forming the duct.

17. The fan according to claim 5, characterized in that a latching element protruding from an extension level of the first section at an angle is arranged at the cross bar, and in that the latching element engages behind the bracket.

18. The cover element according to claim 13, characterized in that the first section is formed bracket-shaped with two longitudinal bars and one cross bar arranged at the end of the longitudinal bars, wherein a latching element protruding from an extension level of the first section at an angle is arranged at the cross bar.

19. The cover element according to claim 14, characterized in that the cover plate at least in the second partial section has wing sections which on a top side of the cover element protrude laterally beyond the margin bars.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The invention will be explained in greater detail hereinafter on the basis of the drawings, in which:

(2) FIG. 1 shows a perspective view of a fan with a housing and a fan wheel,

(3) FIG. 2 shows a perspective view of an underside of a housing of the fan with a cover element,

(4) FIG. 3 shows a perspective view of the inner side of the housing of the fan without a printed circuit board,

(5) FIG. 4 shows a perspective view of the inner side of the housing of the fan with a printed circuit board,

(6) FIG. 5 shows a perspective view of the underside of the housing of the fan without a cover element,

(7) FIG. 6 shows a sectional view of the fan,

(8) FIG. 7 shows a perspective view of a cover element, and

(9) FIG. 8 shows a further perspective view of the cover element.

DETAILED DESCRIPTION

(10) FIGS. 1 to 6 show a fan 100 in different perspectives. Here, in FIGS. 2 to 6 only parts of the fan 100 are shown for clarity reasons and for better understanding. FIGS. 7 and 8 show a cover element 200 in different perspective views. Identical reference numbers in FIGS. 1 to 8 refer to identical features.

(11) According to FIGS. 1 to 6, the fan 100 has a housing 10, wherein in the housing 10 a fan wheel 11 drivable or driven by a not depicted electric motor is arranged. On an underside of the housing 12 of the housing 10, seen in a radial direction 14, an opening 13 is arranged approximately between the axis of rotation 15 of the fan wheel 11 and a circumferential side 16 of the housing (FIGS. 3, 5 and 6). The opening 13 is provided for an electric outlet 30 for power supply of the electric motor arranged in the inside of the housing 27, which is not further depicted in more detail. On the circumferential side 16 the housing has a bracket 17 attached with a bracket end 17a at the circumferential side 16, so that a bushing 18 is formed between the bracket 17 and the circumferential side 16. The bushing 18 is open on one side. An electric line 19 is arranged at least partially at the underside of the housing 12 and is guided through the bushing 18. As can be seen in FIG. 2, in particular, a cover element 200 is arranged at the underside of the housing 12. As can easily be seen in FIGS. 7 and 8, the cover element 200 has a first section 210 and a second section 211. The first section 210 and the second section 211 are arranged at an angle towards each other, so that the cover element 200 is essentially formed L-shaped. According to FIG. 1, the first section 210 of the cover element 200 is at least partially arranged in the bushing 18 and guided through the latter, so that the electric line 19 is clamped in the bushing 18 while forming a strain relief 20. The second section 211 of the cover element 200 covers the opening 13 (FIG. 2). As can be seen particularly from FIG. 5, a recess 21 running in the underside of the housing 12 in the radial direction 14 starting from the opening 13 to the circumferential side 16 is formed, in which the electric line 19 is arranged. From the sectional view according to FIG. 6 it can be seen that the second section 211 with the underside of the housing forms 12 a covered duct 22. The recess 21 is formed by a respective shaping 23 of the housing wall 24 of the housing 10. As can be seen in FIGS. 3 and 4, seen from an inner side of the housing 25 the recess 21 is formed in the shape of a bulge 26. Further, in the inside of the housing 27 a printed circuit board 28 is arranged on an inner side of the housing 25, which covers the opening 13 from the direction of the inner side of the housing 25 (FIG. 4). Electronic components 29 for controlling the fan 100 are arranged on the printed circuit board 28.

(12) For providing the electric outlet 30, a plug connection 31 is provided on the printed circuit board 28. The plug connection 31 comprises a first female part 32 and a second male part 33 arranged therein. The first female part 32 is attached to the printed circuit board 28 as an SMD component in an SMT procedure and protrudes through the opening 13. The second male part 33 is arranged at the end of the electric line 19. As is shown in FIGS. 3 and 6, the plug connection 31 comprising the first female part 32 and the second male part 33 is covered by the second section 211 of the cover element 200.

(13) As can be easily seem in FIGS. 7 and 8, the cover element 200 comprising the first section 210 and the second section 211 is essentially formed L-shaped. The first section 210 has two longitudinal bars 212a, 212b and one cross bar 213 transversely arranged at the end of the longitudinal bars 212a, 212b. Therefore, the first section 210 has an opening 214. A latching element 215 protruding from the extension level of the first section 210 at an angle is arranged at the cross bar 213. This latching element 215 engages behind the bracket 17, if it is arranged at the housing 10 of the fan 100, as can be particularly seen in FIG. 6. The second section 212 of the cover element 200 has two longitudinally extending margin bars 216a, 216b. A cover plate 217 extends between the margin bars 216a, 216b, which, if arranged at the housing 10, covers the recess 21 in the underside of the housing 12 for forming the duct 22. The second section 211 is divided into a first partial section 218 and a second partial section 219. Between the first partial section 218 and the second partial section 219 a step 220 is formed on the underside 221 of the second section 211. If arranged at the housing 10, as can be seen in FIG. 6, the second male part 33 of the plug connection 32 is in a stop to the step 220 of the cover element 200, by which the male part 33 is secured in the plug connection 31. In the region of the step 220 the first partial section 218 has a bulged, arched or tapered transition region 222. As is shown in FIG. 6, the transition region 222 conduces to a load-free guiding of the electric line 19 in the outlet region to the second part 33 of the plug connection 31. The cover plate 217 at least in the second partial section 219 and partially also in the first partial section 218 has wing sections 223 which on a top side 224 of the cover element 200 protrude laterally beyond the margin bars 216a, 216b. If arranged at the housing 10, the wing elements 223, as shown in FIG. 2, abut on the underside of the housing 12.

(14) At an end 225 of the cover plate 217 facing away from the first section 210, an end piece 226 is arranged, which, if arranged at the housing 10, abuts on the underside of the housing 12. Additionally, the margin bars 216a, 216b each have a latching protrusion 227 at an end 225 facing away from the first section 210. If arranged at the housing 10, in which the margin bars 216a, 216b are arranged in the recess 21, the margin bars 216a, 216b are also partially arranged in the opening 13, so that the latching protrusions 227 engage behind the housing wall 24 of the underside of the housing 12 (FIG. 3).

(15) The cover element 200 is made of an electrically insulating material, such as a plastic, a glass or a ceramic, in order to enable an ESD protection.