Emergency lighting device and method for reducing temperature of emergency lighting device

Abstract

The present invention provides an emergency lighting device, comprising a lighting module, an emergency module and a connector, wherein the connector has a cavity, the lighting module is connected to one end of the connector, the emergency module is connected to the other end of the connector, the connector cavity forms a closed space by means of installation, the closed space formed by the connector separates the emergency module and the lighting module, serves as a partition for heat transfer when the lighting module is working, reduces the temperature of the emergency module, and improves the reliability of the emergency module. The present invention also provides a method for reducing the temperature of an emergency lighting device.

Description

Technical Field

[0001] The present invention relates to the field of lighting technology, and in particular to an emergency lighting device and a method for reducing the temperature of the emergency lighting device. Background Art

[0002] High bay lights are a common lighting equipment, often used in factories, mines, warehouses, and high-bay production areas. They are also called mining lights. They are located in complex environments, have a large lighting range, and consume a lot of power. Once a power outage occurs, it is easy to cause production interruptions or even accidents. It is usually necessary to make the lighting device into an emergency lighting device. However, general emergency high bay lights include power supplies, heat sinks, light sources, emergency controls, etc. Emergency controls are generally fixed horizontally to the side of the lamp body. Since most of these emergency lamps are suspended by hooks, the center of gravity of the entire lamp is offset, affecting the correct installation of the lamp; or the emergency controls and power supply are placed in a mounting cavity, but the mounting cavity and the light source are respectively connected to the two ends of the radiator. The light source is located below the radiator for lighting purposes, and the heat generated by the light source is dissipated through the radiator, while the power supply and emergency controls are arranged in the mounting cavity above the radiator. Under the effect of thermal convection, the power supply and emergency controls are roasted by the radiator like a pot on an oven. Although the LED power driver can work in a high temperature environment of 90°C and is not greatly affected by the heating of the LED, the working environment temperature of the emergency control is below 50°C, and the tolerable cavity temperature of the emergency control is below 70°C. In this way, the ambient temperature of the emergency control is greater than its normal working temperature and tolerable cavity temperature, posing a threat to the emergency control, causing serious safety hazards and reducing its service life.

[0003] like Figure 1 CN20603674 discloses an emergency high bay light of the prior art, which comprises a mounting housing 1, a heat sink 6, a mounting cavity 11, a mounting box 5 matched with the mounting cavity 11, an emergency driver 3 and a battery 4 arranged in the mounting box 5, and a lamp 2 located on the other side of the mounting housing 1. The mounting box 5 is located in the mounting cavity 11, and the heat sink is located below and around the mounting box 5. The heat generated by the lamp body passes through the heat sink, and the mounting box is roasted, which affects the ambient temperature of the emergency driver and the battery in the mounting box 5, causing serious safety hazards.

[0004] In view of this, it is necessary to provide an emergency high bay light that can solve the temperature of the cavity where its emergency controls are located so that it can work at a normal temperature. Summary of the invention

[0005] The main purpose of the present invention is to provide an emergency high bay lamp structure, which can reduce the ambient temperature of the emergency controls of the lamp, reduce hidden dangers and increase the service life.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided an emergency lighting device, comprising an emergency module, a lighting module and a connector, wherein the connector has a cavity, the lighting module is connected to one end of the connector, and the emergency module is connected to the other end of the connector, the connector cavity forms an enclosed space after the lighting module and the emergency module are connected, and the enclosed space formed by the connector separates the emergency module and the lighting module.

[0007] Furthermore, the lighting device further comprises a sealing plug, and the sealing plug is arranged between the connecting member and the lighting module and / or the emergency module.

[0008] Furthermore, the lighting module includes a light-emitting element, a light source driver and a heat dissipation element; the heat dissipation element has an interface, and the connector connects the lighting module at the interface; the lighting device also includes a sealing plug, which is arranged between the connector and the interface.

[0009] Furthermore, the emergency module includes a shell, an emergency control and a battery pack, and the emergency control and the battery pack are arranged in the shell; one side of the shell has a fixed structure, and the other side of the shell has an interface, and the connecting piece connects the emergency module at the interface; the lighting device also includes a sealing plug, which is arranged between the connecting piece and the interface.

[0010] Furthermore, the emergency control and the emergency battery pack are evenly weighted, and the center of gravity of the lighting device passes through the connecting piece.

[0011] Another object of the present invention is to provide a method for reducing the temperature of an emergency lighting device, comprising decomposing the emergency lighting device into an emergency module, a lighting module, and a connecting piece; connecting the emergency module and the lighting module to the connecting piece respectively, so that the connecting piece forms a closed space, and the emergency module and the lighting module are separated by the closed space, thereby cutting off the heat convection between the lighting module and the emergency module.

[0012] Furthermore, when the emergency module and the lighting module are connected to the connecting member respectively, a sealing plug is provided between the emergency module and / or the lighting module and the connecting member.

[0013] The lighting device provided by the present invention creatively introduces a connecting piece to spatially separate the lighting module and the emergency module, so that the two directly form a heat transfer partition, cut off the heat convection between the lighting module and the emergency module, reduce the impact of the heat generated by the light source on the electronic devices, and improve the safety and service life of the lighting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0015] Figure 1 An exploded view of a high bay light in the prior art is shown;

[0016] Figure 2 An exploded view of a high bay light structure according to an embodiment of the present invention is shown;

[0017] Figure 3 A cross-sectional view of a high bay light structure according to an embodiment of the present invention is shown;

[0018] Figure 4 A logic block diagram of reducing the temperature of a high bay light emergency module according to an embodiment of the present invention is shown.

[0019] The above drawings include the following reference numerals:

[0020] Housing 1, heat sink 6, mounting cavity 11, mounting box 5, emergency driver 3, battery 4, lamp 2, wire pin 7, handle 8, lighting lamp 21, emergency lamp 22

[0021] 10 Emergency lighting device, 100 Emergency module, 200 Connector, 300 Lighting module, 101 Housing, 102 Interface, 103 Fixed structure, 104 Emergency control, 105 Battery pack, 201 Sealing plug, 301 Lighting element, 302 Interface, 303 Heat dissipation element, 304 Light source driver DETAILED DESCRIPTION

[0022] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as those generally understood by ordinary technicians in the technical field to which the present application belongs. It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. For example, the "seal" included in the element name here does not mean that a single element constitutes or achieves a sealing effect, but means that the ultimate purpose of the element in the entire device is to form a seal or contribute to the formation of a seal. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates that there are features, steps, operations, devices, components and / or combinations thereof; in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. Regarding the other technical contents, features and effects of the present invention mentioned above, it will be clearly presented in the following detailed description of one of the preferred embodiments with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only referenced to the directions of the accompanying drawings. Therefore, the directional terms used are used to illustrate and not to limit the invention.

[0023] The lighting device provided by the present invention directly sets a connector between the emergency module and the lighting module, thereby isolating the emergency module from the lighting module in space, hindering the transfer of heat, achieving the effect of reducing the temperature of the emergency module, improving the reliability of the lighting device, and extending the service life.

[0024] Please refer to Figure 2 and Figure 3 ,like Figure 2 The figure shows an exploded view of the emergency lighting device of the present invention. Figure 3 The figure shows a cross-sectional view of an emergency lighting device of the present invention. The emergency lighting device 10 comprises an emergency module 100, a connector 200, and a lighting module 300. The connector 200 has a cavity, one end of the connector 200 is connected to the emergency module 100, and the other end is connected to the lighting module 300. The cavity of the connector 200 forms a closed space after the lighting module 300 and the emergency module 100 are connected. The closed space formed by the connector 200 separates the emergency module 100 from the lighting module 300 in space, and blocks the path for the heat generated by the lighting module 300 to be transferred to the emergency module 100.

[0025] In detail, the emergency module 100 includes a shell 101, an emergency control 104 and a battery pack 105; the shell 101 includes an upper shell and a lower shell (not marked in the figure), and the upper shell and the lower shell can be fixedly connected by screws to form a cavity. Specifically, a sealing gasket can be provided between the upper shell and the lower shell and then fixedly connected by screws to form a closed cavity, and the emergency control 104 and the battery pack 105 are arranged in the cavity, and a fixed structure 103 is provided on one side surface of the shell 101, such as the surface of the upper shell, and an interface 102 is provided on the other surface of the shell 101 opposite to the lower shell surface, and the fixed structure 103 is integrally formed with the shell or detachably arranged (as shown in the figure The interface 102 is connected to the connector 200 (threaded fixing) on ​​the shell surface. The connector 200 can be a threaded tube, and holes are left at both end faces for only wires to pass through, and the outer surfaces of the tube walls at both ends have a threaded structure, and the inner surface of the interface 102 has a corresponding threaded structure; in another embodiment, the threaded structure of the connector 200 is on the inner surface of the tube, and the end face with a through hole is provided inside the connector 200, while the threaded structure of the interface 102 is on the outer surface; in another embodiment, the connector 200 and the interface 102 can be fixed by bolts, and other commonly used fixed connection methods are not listed here, as long as the connector cavity can form a closed space after installation. Preferably, the surface of the shell 101 is also provided with heat dissipation fins to enhance the heat dissipation effect of the emergency module 100 and further reduce the ambient temperature of the emergency module.

[0026] The lighting module 300 includes a light emitting element 301, a light source driver 304, and a heat dissipation element 303; the heat dissipation element 303 includes an upper portion and a lower portion (not marked in the figure), the upper portion and the lower portion of the heat dissipation element 303 each form a cavity, the light source driver 304 is arranged in the cavity of the upper portion, the light emitting element 301 is arranged in the cavity of the lower portion, and the outer surface of the heat dissipation element 303 is provided with a plurality of heat dissipation fins. In addition, an interface 302 is also provided on the upper outer surface of the heat dissipation element 303, and the interface 302 is connected to the connector 200. Similar to the emergency module 100, the inner surface of the interface 302 has a threaded structure, and the outer surface of the connector 200 has a corresponding threaded structure; in another embodiment, the threaded structure of the connector 200 is on the inner surface of the tube, and the threaded structure of the interface 302 is on the outer surface; in another embodiment, the connector 200 and the interface 302 can be fixed by bolts, and other commonly used fixed connection methods are not listed here.

[0027] The emergency lighting device 10 of the present invention uses a connector 200 to separate the emergency module 100 and the lighting module 300. The connector 200 used is a threaded tube. The distance at which the connector 200 separates the emergency module 100 and the lighting module 300 is determined according to the size of the selected lighting module. The data in Table 1 below are obtained by measurements according to several embodiments of the present invention. The ambient temperature in the experimental conditions is higher than the temperature in actual use. The ambient temperature of the actual use of general products is below 45°C. The experimental temperature is set at 55°C to ensure that the effect of the product in actual use is better than the experimental effect:

[0028] Table 1:

[0029]

[0030] The data of comparative example 1 is an emergency lighting device in the prior art. The lighting module actually includes a light-emitting element and a light source driver. The emergency module is actually an emergency control. The emergency control and the light source driver are arranged in the same chamber.

[0031] From the analysis of experimental data, due to the influence of the convection heat dissipation of the lighting module's heat honeycomb, the heat flow forms a chimney effect. If the connector is not used, the emergency module cavity temperature reaches 81.2°C, which has greatly exceeded the temperature that the emergency control can tolerate. In addition, during the experiment, flickering occurs in the emergency lighting mode and the emergency lighting cannot work normally. In the embodiment of the present application, due to the use of a connector, the connector separates the lighting module from the emergency module, and the temperature of the emergency module is well controlled below the tolerable temperature; and at different connector lengths, the emergency module is affected differently by the heat flow temperature of the lighting module. The greater the distance, and the greater the corresponding ratio of length to outer diameter, the less the temperature of the emergency module cavity is affected by the temperature of the lighting module.

[0032] According to another embodiment of the present invention, the emergency lighting device 10 further includes a sealing plug 201. Specifically, the sealing plug 201 can be arranged between the connector 200 and the emergency module 100 and / or the connector 200 and the lighting module 300. In detail, the sealing plug 201 is arranged in the interface (102, 302). The sealing plug 201 is made of a poor thermal conductor, such as silicone, wood, etc. The sealing plug 201 is provided with a hole (not marked in the figure) to facilitate the electrical connection between the emergency module 100 and the lighting module 300 through a wire. The hole and the wire are interference fit to achieve a sealing effect. The inventor found that after the sealing plug is arranged, it has a better heat insulation effect. Please refer to the experimental data in Table 2 below:

[0033] Table 2:

[0034]

[0035]

[0036] Although the comparative example 2 adopts the connector, it is a common tube with open ends, and cannot form a closed space after assembly, so the thermal convection effect cannot be avoided.

[0037] From the analysis of experimental data, when different sealing materials are used to achieve effective sealing conditions, the temperature of the lighting module cavity and the temperature of the emergency module cavity are effectively isolated. However, in the case of no sealing, because the inner cavities are interconnected, the air heat convection effect is obvious. The temperature of the emergency cavity increases greatly.

[0038] Please refer to Figure 4 , Figure 4 The logic block diagram of the present invention for reducing the temperature of the emergency module of the high bay light is shown in the figure. According to the characteristics of each component of the emergency lighting device 10 during operation, the emergency lighting device can be divided into three parts as a whole, namely: a high heat area, a low temperature working area and a partition area. According to the thermodynamic analysis of the emergency lighting device, among the three heat transfer modes, the influence of heat convection is far greater than that of heat conduction and heat radiation. Figure 4 , the partition area is set between the high-heat area and the low-temperature working area, and the partition area is set as a closed space. The heat from the high-heat area cannot reach the low-temperature working area by convection. Even if the heat is transferred to the partition area, convection will be generated in the closed space of the partition area due to the temperature difference. However, at this time, the heat can only be transferred to the partition area by conduction and radiation, and the transfer is limited. Moreover, convection only occurs inside the partition area, and the effect is very weak. In addition, the heat can only be transferred from the partition area to the low-temperature working area by heat conduction and heat radiation. Therefore, the heat from the high-heat area can only be transferred to the low-temperature working area indirectly through the partition area by heat conduction and heat radiation. Since these two heat transfer methods decay quickly, the influence of the high-heat area on the low-temperature working area is reduced. Figure 2 Figure 3 According to the embodiment, the light emitting element 301 in the lighting module 300 generates heat by emitting light, and the light source driving circuit 304 generates heat, and the heat of the two is dissipated through the heat dissipation element 303. Therefore, the lighting module 300 is the high-temperature area in the emergency lighting device; at the same time, the emergency control 104 and the battery pack 105 in the emergency module have limited temperature tolerance and need to work at a low temperature (relative to the lighting module). Therefore, the emergency module corresponds to the low-temperature working area in the emergency lighting device, and the cavity of the connector forms a closed space after being connected to the lighting module and the emergency module, corresponding to the partition area.

[0039] The present invention creatively introduces a connector to separate the emergency module from the lighting module, forming a closed space between the lighting module and the emergency module, thereby preventing the emergency module from being affected by the heat convection generated when the light-emitting element and the light source are driven. On the other hand, a sealing plug is also provided between the connector and the emergency module and / or the lighting module to further isolate the influence of the heat generated by the lighting module on the emergency module, thereby achieving an excellent heat insulation effect. At the same time, the emergency module and the lighting module of the emergency lighting device are separate structures, which can realize the switching between the emergency lighting device and the ordinary lighting device. For example, the emergency module 100 and the connector 200 are removed, and the fixed structure 103 of the upper shell of the shell 101 is connected to the interface 302 of the lighting module 300, so as to realize rapid transformation. Similarly, the ordinary lighting device can be quickly transformed into an emergency lighting device by adopting the opposite process.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An emergency lighting device, comprising an emergency module, a lighting module and a connector, wherein the connector has a cavity, the lighting module is connected to one end of the connector, the emergency module is connected to the other end of the connector, the connector cavity forms a closed space after the lighting module and the emergency module are connected, and the closed space formed by the connector separates the emergency module and the lighting module; the lighting module comprises a light emitting element, a light source driver and a heat dissipation element; the distance at which the connector separates the emergency module and the lighting module is determined according to the size of the selected lighting module; under different lengths of the connector, the emergency module is affected differently by the heat flow temperature of the lighting module, and the longer the distance and the larger the corresponding ratio of the corresponding length to the outer diameter, the less the temperature of the emergency module cavity is affected by the temperature of the lighting module; the emergency lighting device also includes a sealing plug, which is arranged between the connector and the emergency module and / or the connector and the lighting module, and the sealing plug is provided with a hole to facilitate the electrical connection between the emergency module and the lighting module through a wire, and the hole and the wire are interference fit to achieve a sealing effect.

2. The emergency lighting device according to claim 1, characterized in that: The heat dissipation element has an interface, and the connecting piece is connected to the lighting module at the interface.

3. The emergency lighting device according to claim 1, characterized in that: The emergency module includes a shell, an emergency control and a battery pack, and the emergency control and the battery pack are arranged in the shell.

4. The emergency lighting device according to claim 3, characterized in that: One side of the shell has a fixed structure, and the other side of the shell has an interface, and the connecting piece is connected to the emergency module at the interface.

5. The emergency lighting device according to claim 3, characterized in that: The emergency control and the battery pack are evenly weighted, and the center of gravity of the emergency lighting device passes through the connecting piece.

6. The emergency lighting device according to claim 2 or 4, characterized in that: The emergency lighting device also includes a sealing plug, which is arranged between the connecting piece and the interface.

7. A method for reducing the temperature of an emergency lighting device, applied to the emergency lighting device according to any one of claims 1 to 6, comprising the following steps: a) decomposing the emergency lighting device into a high-heat area, a low-temperature working area, and a partition area; b) connecting the low temperature working area and the high temperature area to the partition area respectively, and the partition area forms a closed space; c) separating the low-temperature working area and the high-heat area through the enclosed space formed by the partition area, thereby cutting off the heat convection between the high-heat area and the low-temperature working area.

8. The method for reducing the temperature of an emergency lighting device according to claim 7, characterized in that: When the high-heat zone and the low-temperature working zone are connected to the isolation zone respectively, a sealing plug is provided between the high-heat zone and / or the low-temperature working zone and the isolation zone.

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