阅读说明：本技术 照明设备 (Lighting device ) 是由 W·勒伯 T·D·杜贝 S·R·穆钱德 K·C·曼勒卡 于 2019-06-21 设计创作，主要内容包括：本公开构思了一种照明设备(100)。照明设备(100)包括至少一个发光二极管阵列(10)、用于驱动发光二极管阵列(10)的驱动器(20)、第一隔室(30)、第二隔室(40)、穿孔壁(50)、散热片阵列(60)和盖(70)。第一隔室(30)容纳发光二极管阵列(10)。第二隔室容纳驱动器(20)。第二隔室(40)通过穿孔壁(50)与第一隔室(30)分隔开。散热片阵列(60)布置在可操作外壁表面上,该可操作外壁表面包围照明设备(100)的第一隔室(30)和/或第二隔室(40)。盖(70)可移除地配合在第一隔室(30)的可操作端部上。照明设备(100)具有防爆炸构造,有效地散热,更便宜且易于组装。(The present disclosure contemplates a lighting device (100). The lighting device (100) comprises at least one light emitting diode array (10), a driver (20) for driving the light emitting diode array (10), a first compartment (30), a second compartment (40), a perforated wall (50), a heat sink array (60) and a cover (70). The first compartment (30) houses an array of light emitting diodes (10). The second compartment houses a driver (20). The second compartment (40) is separated from the first compartment (30) by a perforated wall (50). The array of heat sinks (60) is arranged on an operatively outer wall surface which encloses the first compartment (30) and/or the second compartment (40) of the lighting device (100). A cover (70) is removably fitted over the operable end of the first compartment (30). The lighting device (100) has an explosion-proof construction, efficiently dissipates heat, is less expensive and is easy to assemble.)

1. An illumination device (100) comprising:

at least one array of light emitting diodes (10);

a driver (20) for driving the light emitting diode array (10);

a first compartment (30) housing the array of light emitting diodes (10);

a second compartment (40) containing the driver, wherein the second compartment (40) is separated from the first compartment (30) by a perforated wall (50);

a heat sink array (60) arranged on an operable outer wall surface enclosing the first compartment (30) and/or the second compartment (40) of the lighting device (100), and

a cover (70) removably fitted over an operable end of the first compartment (30).

2. The lighting apparatus (100) according to claim 1, wherein at least one perforation (52) of the perforated wall (50) is susceptible to passing an electrical conductor connecting the light emitting diode array (10) and the driver (20).

3. The lighting apparatus (100) according to claim 1, wherein the cover (70) comprises:

an opening;

a transparent plate (72) disposed in the opening,

a peripheral surface;

a set of helical threads (74) provided on said peripheral surface, said threads (74) facilitating removable mating of said cover (70) on said first compartment (30).

4. The lighting apparatus (100) according to claim 3, wherein the transparent plate (72) has a thickness in the range of 8mm to 15 mm.

5. The lighting apparatus (100) according to claim 3, wherein the transparent plate (72) is spaced apart from the array of light emitting diodes (10) by a predetermined distance.

6. The lighting apparatus (100) according to claim 5, wherein the predetermined distance is in a range of 8mm to 25 mm.

7. The lighting device (100) according to claim 2, characterized in that the ratio of the area of the perforations (52) to the area of the perforated wall (50) has a minimum value of 0.13.

8. The lighting apparatus (100) according to claim 1, wherein the light emitting diode array (10) is encapsulated.

Technical Field

The present disclosure relates to the field of lighting devices.

Background

The following background information herein relates to the present disclosure and is not necessarily prior art.

Lighting fixtures or lamp packages are installed in enclosed spaces of residential and industrial buildings. These lighting devices are self-sufficient units that include a light bulb (which may be an incandescent bulb or a compact fluorescent lamp) or an array of light emitting diodes mounted with a driver.

In industries such as chemistry, oil and gas, the environment in the enclosed space of a building often becomes filled with flammable and thus dangerous gases. The lighting device generates heat during its operation. Thereby, the gas trapped within the housing of the lighting device gradually heats up with the operating time of the lighting device, thereby gradually increasing the pressure within the housing of the lighting device. Arcing and sparking may occur when the lighting device is turned on. As a result of the arc and spark, the pressurized combustible gas ignites in the presence of oxygen and produces a flame. The flame escapes the enclosure along a path with minimal obstruction. If the fire can spread outside the enclosure without being extinguished, a large explosion can be caused in the building. Therefore, there is a need to extinguish flames within the housing of the lighting device.

If any small openings for passing electrical connections are provided between the compartments of the lighting device, a "pressure crimping" effect will result. Any flame ignited within one compartment compresses the gas in front of it as it propagates through the opening. Due to the great pressure rise, detonation may occur, causing a very large explosion. Thus, in order to maintain the flame-proof properties of the housing of the lighting device, it is strictly avoided to provide any interconnection between the compartments by means of pipes, openings or channels. The compromise is to use certified electrical connectors that are properly sealed and provided with a sealing gland to prevent flame spread and pressure overlap, which increases overall cost. Thus, it is appreciated that there is a need for a lighting device that obviates the disadvantages of the arrangements as described hereinabove.

Disclosure of Invention

Some of the objects of the present disclosure, which are met by at least one embodiment herein, are as follows:

it is an object of the present disclosure to provide a lighting device with an explosion-proof construction.

It is another object of the present disclosure to provide a lighting device that efficiently dissipates heat.

It is yet another object of the present disclosure to provide a lighting device that complies with safety standards.

It is yet another object of the present disclosure to provide a lighting device that is easy to assemble.

It is another object of the present disclosure to provide a cheaper lighting device.

Other objects and advantages of the present disclosure will become more apparent from the following description, which is not intended to limit the scope of the present disclosure.

The present disclosure contemplates a lighting apparatus. The lighting device comprises at least one light emitting diode array, a driver for driving the light emitting diode array, a first compartment, a second compartment, a perforated wall, a heat sink array and a cover. The first compartment houses an array of light emitting diodes. The second compartment houses a drive. The second compartment is separated from the first compartment by a perforated wall. The array of heat sinks is arranged on an operatively outer wall surface which encloses the first compartment and/or the second compartment of the lighting device. A cover is removably fitted over the operable end of the first compartment.

According to one embodiment, at least one perforation of the perforated wall is susceptible to passing an electrical conductor connecting the array of light emitting diodes and the driver. According to one aspect of the disclosure, the ratio of the area of the perforations to the area of the perforated wall is a minimum of 0.13.

According to yet another embodiment, a cover includes an opening, a transparent plate disposed in the opening, a peripheral surface, and a set of helical threads disposed on the peripheral surface. The threads facilitate removable mating of the cap on the first compartment. In one embodiment, the transparent plate has a thickness in a range of 8mm to 15 mm. According to one aspect of the present disclosure, the transparent plate is spaced apart from the light emitting diode array by a predetermined distance. In an embodiment, the predetermined distance is in the range of 8mm to 25 mm.

According to another embodiment, the array of light emitting diodes is encapsulated.

Reference numerals

100-Lighting device

10-light emitting diode array

20-driver

30-first compartment

40-second compartment

50-perforated wall

52-perforation

60-fin array

70-lid

72-transparent plate

74-thread

80-terminal block compartment.

Drawings

The lighting device of the present disclosure will now be described in conjunction with the accompanying drawings, in which:

fig. 1 is an isometric view of a lighting device according to the present disclosure;

fig. 2 is an exploded view of a lighting device according to an embodiment of the present disclosure;

fig. 3a is a top view of the capped lighting device of the present disclosure;

fig. 3b is a top view of the lighting device of the present disclosure without the cover;

FIG. 4a is an isometric view of a cover of the present disclosure; and

fig. 4b is another isometric view of a cover of the present disclosure.

Detailed Description

In industries such as chemistry, oil and gas, the environment in the enclosed space of a building often becomes filled with flammable and thus dangerous gases. For illumination purposes in such environments, flame resistant lighting devices are needed. It is required that the flame is extinguished within the housing of the lighting device even if the flame is caused in the housing of the lighting device by the arc and the spark. In addition, expensive, certified electrical connections (which are properly sealed and provided with a sealing cover to prevent flame spread and pressure overlap) need to be used to avoid any flame spread or pressure overlap.

The present disclosure contemplates a lighting device that eliminates the above-mentioned drawbacks of the arrangement as described hereinabove.

The lighting device of the present disclosure will now be described with reference to the accompanying drawings.

Fig. 1 is an isometric view of a lighting device 100 of the present disclosure. The lighting apparatus 100 generally houses lighting devices such as a light emitting diode array 10 and a driver 20 for driving the light emitting diode array 10. The light emitting diode array 10 (hereinafter interchangeably referred to as LED array 10) is housed in a first compartment 30 of the enclosed space of the lighting device. The driver 20 for the LED array 10 is accommodated in the second compartment 40. The second compartment 40 is separated from the first compartment 30 by a perforated wall 50. A junction box compartment 80 is provided in the second compartment 40.

One aspect of the present disclosure is to provide a perforated wall 50, shown in fig. 3a and more clearly in fig. 3b, where the lighting device 100 is shown without the cover 70 in place. In one embodiment, the through-hole 52 is a single through-hole. In another embodiment, the perforations 52 are an array of a plurality of through-holes having a shape selected from a group of shapes, such as a circle, an arc, or any other suitable shape.

Electrical conductors connecting the LED array 10 and the driver 20 pass through the perforations 52. The electrical conductors may be of any known type, such as twisted pair, braided wire, coaxial cable, shielded cable, and the like.

As shown in fig. 1, 2 and 3a and 3b, the lighting device 100 is provided with a heat sink array 60 arranged on an operatively outer wall surface of the first compartment 30 and/or the second compartment 40 enclosing the lighting device 100. Preferably, the cooling fins 60 are disposed throughout the first compartment 30 and the second compartment 40. The reason for providing the heat sink 60 across the back of the first and second compartments 30, 40 is to ensure that the heat sink 60 is arranged as close as possible to the perforated wall 50 so that the heat generated by the LED array 10 is efficiently dissipated.

As shown in fig. 4a and 4b, the cover 70 comprises an opening covered by a transparent plate 72 arranged therein. A cap 70 is removably fitted over the end of the first compartment 30.

The cover 70 includes a peripheral surface. A set of helical threads 74 is provided on the peripheral surface. The threads 74 facilitate removable mating of the cap 70 to the first compartment 30.

The first compartment 30 further comprises reflector elements, such as a specular coating on the wall 50 and on the inner side wall, to improve the illumination efficacy of the illumination device 100.

The driver 20 comprises an AC-DC power converter and regulator which converts the usual 230 volt alternating voltage into a voltage (DC voltage) having a substantially constant average value and of a magnitude suitable for driving the LED array 10. The converter and regulator circuit includes a rectifier, a capacitor, and other necessary components.

In addition, the cap 70 is also provided with a projection on an operable end surface thereof to facilitate screwing and unscrewing of the cap 70.

In one embodiment, the LED array 10 is packaged. Such encapsulation prevents arcing and sparks from the LEDs of the LED array 10 from producing a flame within the surrounding first compartment 30.

The actuator 20 is mounted on any structure within the second compartment 40 that may be supported by the walls of the second compartment 40. In an alternative embodiment, the LED array 10 and the driver 20 are mounted on opposite surfaces on the wall 50, as shown in the exploded view of fig. 2. The cross-section of the compartment can be made in any shape, including circular, rectangular, etc.

In another embodiment as shown in the exploded view of fig. 2, the second compartment 40 and the first compartment 30 are removably attached such that the base of the first compartment 30 is removably mated to the end of the second compartment 40. In an alternative embodiment, the lighting device 100 is formed as a single housing having two compartments (40 and 50) formed by mounting a removable perforated wall 50. In the embodiment disclosed in the exploded view of fig. 2, the mating of the two compartments (30 and 40) is preferably accomplished by providing complementary threads to the mating surfaces of the compartments. In another alternative embodiment, a flange joint may also be provided for attachment of the first compartment 30 and the second compartment 40. However, additional components (such as washers, screws or bolts) are required for flame protection, and in addition tight tolerances are required, which makes the choice of such a joint arrangement (i.e. a flange joint) less preferred than a threaded joint arrangement.

One of the purposes of providing the perforations 52 is to increase the ease of assembly. After mounting one of the LED array 10 and the driver 20 on the wall 50, the electrical connection can be made without much difficulty through the perforations 52 and with other components mounted on the other side of the wall 50. Thus, assembly time and effort are significantly reduced compared to other known arrangements of assembling a lighting device, in which the two compartments 30 and 40 are sealingly separated. In addition, the need to have certified connectors to establish electrical connections between the LED array 10 and the driver 20 is also eliminated by having the compartments 30 and 40 interconnected.

By setting the ratio of the area of the perforations 52 to the area of the perforated wall 50 to 0.13 or more, the pressure overlap effect in the space occupied by the LED array 10 is counteracted, which would otherwise adversely affect the design requirements of the lighting device, wherein thicker walls of the compartment and thicker transparent plates for the cover would be required. Otherwise, when the above-mentioned ratio is less than 0.13, pressure overlap will occur. In this case, by virtue of the geometry due to the narrow opening, the combustible gas in the second compartment becomes highly compressed by the flame front of the flame, which is generated by the arc or spark in the first compartment through the very narrow opening (or vice versa), thereby increasing the probability of detonation inside the housing of the lighting device.

The transparent plate 72 is made using glass, such as soda lime glass, but other transparent materials having similar refractive indices and minimally distorting light from the LED array 10 may also be used to make the transparent plate 72. A transparent plate is used in the cover 70. In another embodiment, translucent glass, or patterned glass that diffuses light, or even a polymer sheet that meets the optical requirements of the application, may also be implemented here. Yet another technical advance obtained by providing the perforations 52 is that the design requirements for the thickness of the transparent plate 72 and the distance between the LED array 10 and the transparent plate 72 are minimized without compromising on the flame protection characteristics of the housing of the lighting device. Preferably, the thickness of the transparent plate 72 according to the present disclosure is in the range of 8mm to 15 mm. The transparent plate 72 is spaced apart from the LED array 10 by a predetermined distance. Preferably, the predetermined distance is in the range of 8mm to 25 mm.

The space between the complementary threads formed on the cover 70 and the first compartment 30 defines a flame path. At least six threads are provided according to safety standards. Thus, the extinguishing of the flame is sufficiently promoted so as not to allow the flame to spread outside the compartment.

When an element is referred to as being "mounted on," "engaged to," "connected to" or "coupled to" another element, it can be directly on, engaged, connected or coupled to the other element. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed elements.

The terms first, second, third and the like should not be construed as limiting the scope of the present disclosure, as the above-mentioned terms may only be used to distinguish one element, component, region, layer or section from another component, region, layer or section. Terms such as first, second, third, etc., when used herein do not imply a particular order or sequence unless clearly indicated by the present disclosure.

Terms such as "inner," "outer," "below," "lower," "above," "upper," and the like may be used in this disclosure to describe a relationship between different elements, as depicted in the figures.

The foregoing description of various embodiments has been provided for the purposes of illustration and is not intended to limit the scope of the present disclosure. The individual components of a particular embodiment are generally not limited to that particular embodiment, but may be interchangeable. Such variations are not to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.

Numerous embodiments are provided to fully and fully convey the scope of the disclosure to those skilled in the art. Numerous details are set forth relating to specific components and methods in order to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that the details provided in the examples should not be construed as limiting the scope of the disclosure. In some embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only, and such terminology is not to be taken as limiting the scope of the present disclosure. As used in this disclosure, the forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," "with," and "having" are open-ended transition terms and thus specify the presence of stated features, integers, steps, operations, elements, modules, units, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The particular order of the steps disclosed in the methods and processes of the present disclosure should not be construed as necessarily requiring their performance as described or illustrated. It should also be understood that additional or alternative steps may be employed.

Technical progress

The present disclosure as described herein above has a number of technical advantages, including but not limited to, enabling a lighting device that:

an explosion-proof construction;

effectively dissipating heat;

compliance with safety standards;

having optimized dimensions;

cheaper; and is

Easy to assemble.

The foregoing disclosure has been described with reference to the accompanying examples, which do not limit the scope and ambit of the disclosure. The description is provided by way of example and illustration only.

The embodiments herein and the various features and advantageous details thereof are explained with reference to non-limiting embodiments in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.

The foregoing description of the specific embodiments reveals the general nature of the embodiments herein sufficiently that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and therefore such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Thus, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments described herein.

The use of the expression "at least" or "at least one" indicates the use of one or more elements or components or quantities, as such use may be made in embodiments of the present disclosure to achieve one or more of the desired objectives or results.

Any discussion of documents, acts, materials, devices, articles or the like which has been included in the present specification is solely for the purpose of providing a context for the present disclosure. It is not to be taken as an admission that any or all of these matters form part of the prior art base or were common general knowledge in the field relevant to the present disclosure as it existed anywhere before the priority date of this application.

The numerical values mentioned for the various physical parameters, dimensions or quantities are only approximations and it is contemplated that values higher/lower than the numerical values assigned to the parameters, dimensions or quantities fall within the scope of the disclosure unless explicitly stated to the contrary in the specification.

While considerable emphasis has been placed herein on the components and component parts of the preferred embodiments, it will be appreciated that various embodiments can be made and that various changes can be made in the preferred embodiments without departing from the principles of the disclosure. These and other variations in the preferred embodiments, as well as other embodiments of the disclosure, will be apparent to those skilled in the art from the disclosure herein, whereby it is to be clearly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the disclosure and not as a limitation.