• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    According to the invention, a lighting device (6, 106) for a refrigerated display for presenting goods comprises a plurality of LEDs (8, 108) arranged along a longitudinal direction of the lighting device (6, 106) and a reflector having at least two reflector surfaces (12, 112; , 114), which are formed laterally of the LEDs, wherein the light emitted directly from the LEDs (8, 108) and reflected at the reflector surfaces (12, 112; 14, 114) defines a light distribution which is in a cross-sectional plane perpendicular to the longitudinal extension of the illumination device two angular ranges, each with a light intensity maximum (a, a`b, b`).
    公开号:AT12664U1
    申请号:TGM422/2011U
    申请日:2011-07-26
    公开日:2012-09-15
    发明作者:
    申请人:Siteco Beleuchtungstech Gmbh；
    IPC主号:
    专利说明:

    Austrian Patent Office AT 12 664 U1 2012-09-15
    Description: [0001] The invention relates to a lighting device for refrigerated cabinets, in particular for refrigerated shelves or freezer cabinets, which are specially set up for displaying merchandise in the sales area.
    Lighting devices for refrigerated cabinets, which are provided for the presentation of goods, are subject to particularly critical technical requirements. The lighting equipment must be designed to permanently illuminate the goods. The energy input into the refrigerator, i. the heat emitted by the luminaire should be as low as possible in order to minimize the energy consumption necessary for cooling.
    As a preferred light source for lighting equipment in refrigeration units LEDs are already known in the art. For example, DE 20 2009 017 408 discloses an illumination device optimized for refrigeration units, which is optimized for illuminating individual compartments in a refrigerated shelf.
    Despite the use of LEDs (light emitting diodes, which also organic light emitting diodes are to be understood) as a light source in such lighting devices, the heat input into the refrigerator is still high. It is therefore desirable to further optimize the illumination device, so that a good illumination of the goods arranged in the refrigeration device is ensured with the lowest possible output of the illumination device.
    The object is achieved by a lighting device for a refrigerated goods display device, comprising: a plurality of LEDs, which are arranged along a longitudinal direction of the illumination device, and a reflector having at least two reflector surfaces, which are formed laterally of the LEDs, wherein the The light emitted directly by the LEDs and the light reflected at the reflector surfaces defines a light distribution which, in a cross-sectional plane perpendicular to the longitudinal extent of the illumination device, has two angular ranges, each with a light intensity maximum.
    The invention is based on the observation that conventional lighting devices with LEDs as lighting means have no optimized light distribution to illuminate the contents of a refrigerated shelf or a freezer. According to the invention, a special light distribution is generated by the LEDs and the two reflector surfaces, which is optimized to illuminate the volume of a refrigerated shelf or a freezer. Due to the optimized light distribution fuzzier LEDs can be used for the lighting device, so that the heat emitted is reduced, yet the goods arranged in the refrigerator can be sufficiently illuminated. The high number of less powerful LEDs also glare effects are avoided or at least reduced.
    For an illumination arrangement according to the present invention, for example, according to one embodiment, between 30 and 70 LEDs suffice per 30 cm length of illumination device, each LED being e.g. has less than 0.1 W of power.
    According to a preferred embodiment, the light intensity maxima measured in the cross-sectional plane perpendicular to the longitudinal extent of the illumination device of the illumination device from an angular distance between 30 ° and 90 °, preferably between 40 ° and 70 °, on. These angular distances are particularly well suited for placing the goods arranged in the refrigerated shelf along the visible front, e.g. along a discharge opening or a transparent cover of the refrigerated cabinet to illuminate and at the same time the contents of the refrigerator in the depth, e.g. in a horizontal direction in a compartment of a refrigerated shelf or in the vertical direction to the bottom of a freezer to illuminate. The range of the luminous intensity distribution curve between the two maxima is less relevant for the illumination of the goods. Therefore, even in this angular range can be dispensed with a high light intensity, whereby the total energy consumption of the lighting device is reduced. According to a preferred embodiment, the first angular range of the light distribution in a cross-sectional plane perpendicular to the longitudinal extent of the illumination means (corresponds to a C-plane of a luminaire) is between 0 ° and 40 ° and the second angle range between 50 ° and 90 ° when 0 ° denotes the vertical axis through the illuminator. The angular ranges of the light distribution curve, within each of which is a maximum, are aligned so that one maximum can illuminate the front of the goods and the other maximum in the depth of the cabinet (depending on the type of cabinet in the vertical or horizontal direction) is aligned ,
    According to a preferred embodiment, the two angular ranges include a main maximum and a secondary maximum, wherein the light intensity of the main maximum is formed by a factor of 2 to 4 stronger than the intensity of the secondary maximum. Furthermore, according to a preferred embodiment, the half-width of the main maximum is less than the half-width of the secondary maximum. In this embodiment, the main maximum is particularly suitable for illuminating the goods along the visible front.
    According to a preferred embodiment, the LEDs are arranged in one or more rows on a support surface in the longitudinal direction of the illumination device. Preferably, the reflector surfaces can be attached directly adjacent to the support surface. The support surface itself may also be reflective. It may also be a one-piece component in the two reflector surfaces and / or the support surface. However, the reflector surfaces and / or the support surface may also be formed as separate components. The support surface may be flat, e.g. To attach LEDs to a board. The support surface can also be formed from a circuit board itself. Furthermore, the reflector surfaces, the support surface and / or the circuit board can be formed from a plurality of components arranged in the longitudinal direction of the luminaire.
    According to a preferred embodiment, the first reflector surface at an angle between 85 ° to 90 ° to the support surface of the LEDs and / or the second reflector surface an angle between 140 ° to 165 ° to the support surface of the LEDs, each measured in a cross section perpendicular to the longitudinal extent the lighting device, on. With this arrangement of the first and second reflector surfaces, the light can be reflected in the direction of the first angular range or of the second angular range of the light distribution. Preferably, the reflector surface arranged at an angle between 85 ° to 90 ° to the support surface is intended to direct the light toward the main maximum of the light intensity distribution, while the second reflector surface is adapted to direct the light in the direction of the secondary maximum of the light intensity distribution, wherein the light distribution in the secondary maximum to a high proportion is also generated by light rays that radiate directly from the LEDs.
    According to a preferred embodiment, the first and / or the second reflector surface is flat or has a concave curvature. The concave curvature ensures bundling of the light radiation and is particularly suitable for generating the narrow main maximum of the light intensity distribution. The flat reflector surface ensures a wider distribution of the reflected light radiation.
    According to a preferred embodiment, in the light path of the LEDs in front of or behind, in particular in the region of a light exit opening of the reflector, a transparent cover, e.g. a diffuser, arranged. The cover ensures that the luminaire is protected against dust or condensation. The embodiment as a diffuser has the advantage that the light distribution of the LEDs appearing as light points is made uniform after emerging from the light exit opening of the illumination device. Preferably, the lens has a transmission of more than 90%, wherein transmission is to be understood as meaning the portion of the luminous flux which passes through the lens. The relatively small spread suffices to make the LEDs acting as point light emitters appear as a bright line. However, the scattering is not so high that the desired light intensity distribution is resolved in the form of the two maxima.
    According to a further aspect, the invention also relates to a refrigerated cabinet, in which a lighting device, as previously described, is integrated. The lighting device is preferably arranged along an edge of a window integrated for the presentation of goods or of an opening of the cooling appliance provided for removing the goods. The main maximum of the light distribution is preferably arranged approximately along the plane of the window or the goods removal opening, so that the main maximum serves to illuminate the visible goods front.
    According to one embodiment, the refrigerated cabinet is designed as a refrigerated shelf with shelves, wherein the longitudinal extent of the lighting device is aligned parallel to the longitudinal direction of the shelves. In particular, the illumination device can be arranged on a horizontal upper outer edge of the cooling rack. The main maximum of the light distribution of the lighting device in this embodiment, from the upper edge of the cooling rack approximately along the plane formed by the front edges of the shelves, down to thereby illuminate the goods fronts.
    According to an alternative embodiment, the cooling furniture may be formed as a freezer, wherein the lighting device is arranged in the region along an edge of an upwardly facing discharge opening or an upwardly facing, provided for opening cover. The main maximum of the light intensity distribution in this embodiment is preferably aligned in the horizontal plane along the removal opening or the cover to be opened. In this embodiment, the lighting device can be arranged in particular in a handrail of the freezer, which is located at the front edge or at the side edges of the freezer. The lighting device can also be arranged in an intermediate wall which separates two opposite freezer sections.
    Further features and advantages of the invention will become apparent from the following description of preferred embodiments. The figures show the following: FIG. 1 FIG. 2 FIG. 3 FIG. 4 FIG. 5 [0024] FIG. 6 shows a cooling rack in cross-section. shows in cross section the reflector and a light source of a lighting device, wherein a part of the reflected light rays from the light source at a reflector portion are located. shows a light intensity distribution curve shown in polar coordinates of the illumination device according to Figure 2. shows a lighting device according to an alternative embodiment in cross section. shows the light intensity distribution curve in polar coordinates of the lighting device of Figure 4. Figure 4 shows a perspective view of a cabinet, in which a lighting device is integrated according to Figure 4.
    Referring to Figures 1 to 3, a first embodiment of the lighting device or a refrigerated cabinet will be described.
    FIG. 1 shows a cooling rack 2 in cross section. The cooling rack 2 has an insulating housing in which a plurality of shelves 4 are mounted approximately horizontally. The refrigerated shelf is closed on one side or with a transparent cover that can be opened by a customer. An illumination device 6 is located on the upper edge of the cooling rack 2 along an opening or an openable, transparent cover. The illumination device 6 is shown in FIG. 2, the illumination device being shown without a housing for a better overview. The lighting device 6 extends in the longitudinal direction of the cooling rack (i.e., perpendicular to the image plane of Figures 1 and 2) and has a plurality of LEDs 8 as a lighting means one behind the other. The LEDs 8 are arranged on a carrier surface 10 in a row. The support surface 10 is reflective, in particular specularly reflective, high-gloss, semi-gloss or matt. It is to be understood that, according to an alternative embodiment, a plurality of rows of LEDs may also be provided one above the other on the carrier surface 10.
    On the support surface 10 are two reflector surfaces 12 and 14, in the form of reflector strips, which are each formed parallel to the longitudinal extent of the illumination device arranged. The reflector surface 12 is flat and arranged at an angle α of 154 ° (preferred values are between 140 ° and 165 °) relative to the support surface 10. A second reflector surface is arranged on the support surface above the LEDs at an angle β of 90 ° (preferred values are between 85 ° and 95 °). The second reflector surface 14 has a concave curvature with a radius of curvature of about 80 mm (preferred values are between 50 mm and 120 mm).
    The light intensity distribution, which is generated by the lamp according to Figure 2, is shown in a polar diagram in Figure 3. Furthermore, the light intensity distribution is plotted as a curve in the sectional view of Figure 1. FIG. 3 shows the light distribution curve in a polar representation in a sectional plane perpendicular to the longitudinal extent of the illumination device 6. The axis which extends vertically through the illumination device 6 and points downwards is designated 0 ° in the polar diagram. A main maximum a of the light distribution curve extends in a direction of about 15 °. A secondary maximum b extends in a direction of about 65 °. The angular distance Δφ between the direction of the main maximum and the direction of the secondary maximum is therefore approximately 50 °. As can be seen in FIG. 1, the main maximum of the illumination device 6 points along the front edge of the shelves 4. In this area, the goods arranged on the shelves 4 are illuminated from their front side. The proportion of the light distribution curve which forms the secondary maximum b serves to illuminate the upper compartment in the cooling rack in the horizontal direction. The other compartments can be illuminated by further lighting devices on the lower edge of the shelves 4. In principle, the same lighting devices as the lighting device 6 can be used for these lights. Other ratios between the major and minor maximum in the light distribution curve may also be selected.
    The main maximum a of the illumination device 6 is generated predominantly by the proportion of the light which is reflected at the reflector surface 14. The relatively narrow main maximum a is caused by the fact that the reflector surface 14 has a concave curvature, which bundles the light, as shown in the beam path in Figure 3. The proportion of the light distribution in the secondary maximum b is predominantly formed by the light emitted directly by the LEDs 8 and the light reflected at the reflector surface 12.
    Referring to Figures 4 to 6, a second embodiment of the illumination device will be described.
    Figure 4 shows a cross section through the illumination device 106. The illumination device 106 is designed to be arranged in a freezer, which is shown by way of example in Figure 6, in the region of the edges of a discharge opening of the freezer or provided for opening transparent cover of the freezer to become. In particular, the illumination device 106 is mounted in a circumferential handrail of the freezer. Furthermore, as illustrated in FIG. 6 on an intermediate wall, the illumination device 106 can also be provided on an edge of the transparent cover provided for opening, which adjoins the intermediate wall of the freezer.
    With reference to FIG. 4, it can be seen that the illumination device has a plurality of rows of LEDs 108 which are arranged on a common board 109. The board 109 is mounted on a support surface 110 of the illumination device. Two reflector surfaces 112 and 114 extend laterally from the carrier plane 110. The reflector surface 112 is flat and has an angle to the carrier surface 110 of approximately 150 °. The reflector surface 114 is executed partially convexly curved. The reflector surface 114 adjoins the support surface 110 at an angle of 90 °. The reflector surfaces 112 and 114 are formed with the support surface 110 in one piece. This assembly is housed in a housing which may be referred to as a continuous profile, e. G. an aluminum extruded profile is formed. On the housing 116 are projections and recesses, which allow using mounting means, such as support brackets (not shown in the figures) to mount the illumination device 106 in a handrail of the freezer.
    Referring to Figure 5, the light distribution curve is shown in a cross-section perpendicular to the longitudinal extent of the illumination device 106. The light distribution has a major maximum a 'which extends in a direction of 75 ° in the polar representation shown. Furthermore, the luminous intensity distribution curve has a relatively wide secondary maximum b ', which is in an angular range between 20 ° and 40 °, i. centered at 30 °, extends. The angular distance Δφ 'between the main maximum a' and the secondary maximum b 'is about 45 °.
    The main maximum a 'is generated by the illumination device 106 substantially by the light radiation, which is reflected at the reflector surface 114. The main maximum is relatively narrow, because the light emitted in this direction is focused by the concave curvature of the reflector surface 114. The secondary maximum b 'is generated essentially by the light emitted directly by the LEDs 108 and the light reflected at the reflector surface 112.
    Compared to the embodiment according to Figures 2 and 3, the position of the main maximum and the secondary maximum is approximately reversed. This light distribution is particularly suitable for the freezer shown in Figure 6, because the goods front to be illuminated, which is first perceived by the customer, runs in the horizontal direction and thus can be well illuminated by the main maximum a '. The secondary maximum b 'illuminates the cabinet in depth towards the floor.
    In comparison between the light distribution curve according to Figure 3 and Figure 5 it is further shown that the secondary maximum is formed wider overall in Figure 5. This is due to the fact that a diffusing screen 118 is arranged on the illumination device 106 in the region of the light exit opening of the reflector. The diffuser has a transmission of over 90%. The scattering is so small that the maxima of the light intensity distribution are not mixed. Due to the scattering, however, the maxima appear slightly wider.
    Numerous modifications of the previously described embodiments of the lighting devices are possible within the scope of the invention, as defined in the claims. In particular, the exact position and the strength of the two maxima in the light distribution curve can be adapted to the conditions of the refrigerated cabinet and with respect to the position of the illumination device within the refrigerator. 5/11
    权利要求:
    Claims (15)
    [1]
    Austrian Patent Office AT 12 664 U1 2012-09-15 REFERENCE LIST: 2 Cooling shelf 4 Shelf 6, 106 Lighting unit 8, 108 LED 109 Board 10, 110 Carrier surface 12, 112 Reflector surface, 14, 114 Reflector surface 116 Housing 118 Diffuser a, a 'Main maximum Angular Distance Claims 1. A lighting device (6, 106) for a refrigerated display case comprising: a plurality of LEDs (8, 108) disposed along a longitudinal direction of the illuminator (6, 106) , and a reflector having at least two reflector surfaces (12, 112, 14, 114) which are formed laterally of the LEDs, wherein the directly emitted from the LEDs (8, 108) and at the reflector surfaces (12, 112, 14, 114 ) reflected light defines a light distribution which, in a cross-sectional plane perpendicular to the longitudinal extension of the illumination device, has two angular ranges each with a maximum light intensity (a, a '; b, b'). having.
    [2]
    2. Lighting device (6, 106) according to claim 1, wherein the two light intensity maxima (a, a ', b, b') in the cross-sectional plane of the illumination device (6, 106) measured from an angular distance (Δφ, Δφ ') between 30 ° and 90 °, preferably between 40 ° and 70 °.
    [3]
    3. lighting device (6, 106) according to any one of the preceding claims, wherein the first angular range of the light distribution in the cross-sectional plane between 0 ° and 40 ° and the second angular range between 50 ° and 90 °, wherein 0 ° the direction of a vertical axis through denotes the lighting device.
    [4]
    4. Lighting device (6,106) according to one of the preceding claims, wherein the two light intensity maxima comprise a main maximum (a, a ') and a secondary maximum (b, b'), wherein the light intensity of the main maximum is formed by a factor of 2 to 4 stronger than the intensity of the secondary maximum (b, b ').
    [5]
    5. Lighting device (6, 106) according to any one of the preceding claims, wherein the LEDs (8, 108) in one or more rows on a support surface (10, 110) in the longitudinal direction of the illumination device (6,106) are arranged. 6/11 Austrian Patent Office AT12 664U1 2012-09-15
    [6]
    6. lighting device (6, 106) according to claim 5, wherein the first reflector surface (14, 114) an angle between 85 ° to 90 ° to the support surface (10, 110) and / or the second reflector surface (12, 112) forms an angle between 140 ° to 165 ° to the support surface (10, 110), each measured in a cross section perpendicular to the longitudinal direction of the illumination device having.
    [7]
    7. Lighting device according to one of the preceding claims, wherein the first and / or the second reflector surface (12, 112, 14, 114) is flat or has a concave curvature.
    [8]
    8. Lighting device (106) according to one of the preceding claims, wherein a diffusing screen is arranged in an optical path from the LEDs in front or behind, in particular in the region of a light exit opening of the reflector.
    [9]
    The illumination device (106) of claim 8, wherein the lens (118) has a light transmission of greater than 90%.
    [10]
    10. refrigerated cabinet, which has a lighting device (6, 106) according to one of the preceding claims.
    [11]
    11. The refrigerator according to claim 10, wherein the lighting device is arranged along an edge of a window integrated for the presentation of goods or provided for removal of goods opening of the refrigerator.
    [12]
    12. The refrigerator according to claim 10 or 11 in the form of a refrigerated shelf (2) with shelves (4), wherein the longitudinal extent of the lighting device (6) is aligned parallel to a longitudinal direction of the shelves (4).
    [13]
    13. The refrigerator according to claim 12, wherein the lighting device in the region of a horizontal uppermost outer edge of the cooling rack (2) is arranged.
    [14]
    14. The refrigerator according to claim 10 or 11 in the form of a freezer, in which the lighting device (106) is arranged in the region and along an edge of an upwardly facing removal opening or an upwardly facing, provided for opening cover.
    [15]
    15. The refrigerator according to claim 14, wherein the lighting device (106) is integrated in a handrail. 4 sheets of drawings 7/11
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    同族专利:
    公开号 | 公开日
    DE202010011614U1|2010-10-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20030137828A1|2002-01-10|2003-07-24|Artak Ter-Hovhannisian|Low temperature led lighting system|
    US20050265019A1|2004-05-26|2005-12-01|Gelcore Llc|LED lighting systems for product display cases|
    US20070195535A1|2006-02-23|2007-08-23|Anthony, Inc.|Reflector system for led illuminated display case|
    WO2008027314A2|2006-08-30|2008-03-06|Lumination Llc|Booster optic|
    WO2008097496A1|2007-02-03|2008-08-14|Illuminer, Inc.|Light emitting diode assemblies for illuminating refrigerated areas|
    EP2092859A1|2008-02-20|2009-08-26|Epta S.p.A.|Lighting method and system for display cabinets of the frozen or chilled type|
    DE202009017408U1|2009-12-16|2010-03-25|Siteco Beleuchtungstechnik Gmbh|LED lamp cooling rack|CN103925561B|2013-01-10|2015-10-28|海洋王（东莞）照明科技有限公司|LED ring illumination light distribution structure|
    US9890914B2|2013-01-18|2018-02-13|Raves Equipment Company|Lighting assembly|
    DE102015121286B4|2015-07-28|2020-06-25|Felsch Lighting Design Gmbh|Shelf light|
    CN106402723B|2015-08-03|2019-05-03|通用电气照明解决方案有限公司|A kind of LED lamp|
    法律状态:
    2021-03-15| MM01| Lapse because of not paying annual fees|Effective date: 20200731 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE202010011614U|DE202010011614U1|2010-08-20|2010-08-20|Lighting device for a refrigerated cabinet|
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