Low-temperature-resistant wall washer lamp

Abstract

The utility model relates to a low-temperature-resistant wall washer, and belongs to the technical field of wall washers. The low-temperature-resistant wall washer lamp comprises a radiator, a heat conduction partition plate extending in the length direction is arranged in the radiator, an inner cavity of the radiator is divided into a first cavity and a second cavity through the heat conduction partition plate, end covers are arranged at the two ends of the radiator, and a light-transmitting panel is arranged in the first cavity; the lamp panel is located in the first cavity and attached to the heat conduction partition plate. The flexible heating film is located in the second cavity and attached to the heat conduction partition plate; the temperature control system comprises a first temperature sensor and a controller which are integrated on the lamp panel, the controller is connected with the flexible heating film, and the controller controls starting and stopping of the flexible heating film according to signals of the first temperature sensor. According to the scheme provided by the utility model, the problem of unstable low-temperature control of the wall washing lamp in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to wall washing lamp technical field especially relates to a low temperature resistant wall washing lamp. BACKGROUND

[0002] Wall washing lamp has the characteristics such as energy saving, high light efficiency, rich color, long service life, and its light efficiency can make light like water washes wall surface, and it is very popular in building decoration lighting. In cold regions, when the wall washing lamp is below minus 40 DEG C, the characteristics of the electronic components such as integrated circuit, electrolytic capacitor, diode and triode in the wall washing lamp will change greatly, for example, the problems such as the decrease of capacitance value, the breakdown of components, the failure to start and the weakening of anti-interference ability, which affect the use stability of the wall washing lamp. SUMMARY

[0003] In order to overcome the problems in the related art, the utility model provides a low temperature resistant wall washing lamp to solve the problem of unstable low temperature control of the wall washing lamp in the prior art.

[0004] The utility model provides a low temperature resistant wall washing lamp, including radiator, its inside is equipped with the heat conduction partition that extends along the length direction, the heat conduction partition divides the first chamber and the second chamber for the radiator inner chamber, the both ends of the radiator are equipped with end cover, the first chamber is equipped with the light -transmitting panel,

[0005] The lamp panel is located in the first chamber and is attached to the heat conduction partition.

[0006] The flexible heating film is located in the second chamber and is attached to the heat conduction partition.

[0007] The temperature control system includes a first temperature sensor and a controller integrated on the lamp panel. The controller is connected to the flexible heating film. The controller controls the start and stop of the flexible heating film according to the signal of the first temperature sensor.

[0008] In some embodiments, the flexible heating film includes a plurality of parallel electric heating wires and a flexible substrate layer wrapping the electric heating wires. The both ends of each electric heating wire are connected to lead wires extending out of the flexible substrate layer. The lead wires are connected to a plug-in connector. The lamp panel is provided with a connector, and the plug-in connector is plugged into the connector.

[0009] In some embodiments, the electric heating wires are arranged in a serpentine pattern within the flexible substrate layer, with the input end and the output end located on the same side of the flexible substrate layer.

[0010] In some embodiments, the electric heating wires are metal resistance wires.

[0011] In some embodiments, the flexible substrate layer is made of two layers of polyimide films hot-pressed and combined.

[0012] In some embodiments, a protective layer is further included, which is attached to the outer surface of the flexible substrate layer away from the heat-conducting partition, and a second temperature sensor is arranged between the protective layer and the flexible substrate layer, and the second temperature sensor is connected to the controller.

[0013] In some embodiments, the heat sink comprises a frame and a bottom plate, the frame is integrally formed with the heat-conducting partition, and the bottom plate is detachably arranged at the bottom of the frame.

[0014] In some embodiments, a first sealing structure is arranged at the connection between the heat sink and the end cover, a second sealing structure is arranged at the connection between the heat sink and the light-transmitting panel, and a third sealing structure is arranged at the connection between the bottom plate and the frame.

[0015] Compared with the prior art, the low-temperature-resistant wall washing lamp has the beneficial effects that:

[0016] The lamp groove and the mounting cavity are divided by the heat-conducting partition, and the independent attachment design of the flexible heating film and the lamp panel is combined, so that an efficient heat conduction mechanism is realized, and stable operation of the wall washing lamp in a low-temperature environment is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description of exemplary embodiments of the present application taken in conjunction with the accompanying drawings, in which like reference characters refer to the like parts throughout the figures, and in which:

[0018] Figure 1 is a perspective structural schematic view of the low-temperature-resistant wall washing lamp according to an embodiment of the present application;

[0019] Figure 2 is an exploded schematic view of the low-temperature-resistant wall washing lamp according to an embodiment of the present application;

[0020] Figure 3 is a sectional view of the low-temperature-resistant wall washing lamp according to an embodiment of the present application;

[0021] Figure 4 is a structural schematic view of the flexible heating film according to an embodiment of the present application;

[0022] Figure 5 is Figure 4 is an enlarged schematic view of part A in FIG.

[0023] Figure 6 is another structural schematic view of the flexible heating film according to an embodiment of the present application.

[0024] LIST OF REFERENCE NUMERALS:

[0025] 1, radiator; 10, heat-conducting partition; 11, frame; 12, bottom plate; 2, lamp panel; 3, flexible heating film; 31, heating wire; 32, flexible substrate layer; 33, lead-out wire; 4, end cover; 5, light-transmitting panel. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present application will be described in detail below with reference to the drawings. Although the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to convey the scope of the present application to those skilled in the art.

[0027] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] Figure 1 A three-dimensional structure schematic diagram of a low-temperature-resistant wall washing lamp provided by an embodiment of the present application.

[0030] As shown in Figures 1 to 6 A low-temperature-resistant wall washing lamp provided by an embodiment of the present application includes a radiator 1, which is internally provided with a heat-conducting partition 10 extending along the length direction, the heat-conducting partition 10 divides the inner cavity of the radiator 1 into a first chamber and a second chamber, both ends of the radiator 1 are provided with end covers 4, and the first chamber is provided with a light-transmitting panel 5.

[0031] A lamp panel 2 is located in the first chamber and is attached to the heat-conducting partition 10.

[0032] The flexible heating film 3 is located in the second chamber and is attached to the heat-conducting partition 10.

[0033] The temperature control system comprises a first temperature sensor (not shown) and a controller (not shown) integrated on the lamp panel 2, the controller is connected to the flexible heating film 3, and the controller controls the start and stop of the flexible heating film 3 according to the signal of the first temperature sensor.

[0034] Specifically, the heat sink 1 is in the shape of a long strip square channel, and the material can be selected from aluminum or aluminum alloy, for example, a long strip heat sink 1 is extruded from 6063 aluminum alloy. The heat sink 1 serves as the shell of the wall washer lamp, and the inside is designed as a hollow structure, and the lamp panel 2 and the flexible heating film 3 are arranged inside the heat sink 1. The lamp panel 2 and the flexible heating film 3 are in thermal contact through the heat-conducting partition 10 to promote vertical heat conduction. The flexible heating film 3 is adhered to the heat-conducting partition 10 by a vacuum suction positioning tool, and the heat-conducting partition 10 can be integrally formed with the heat sink 1 or assembled in a detachable manner. The controller is integrated on the lamp panel 2, and the controller is connected to the flexible heating film 3. The controller includes a control chip and a micro relay, and the first temperature sensor is connected to the control chip. The first temperature sensor is used to monitor the temperature of the lamp panel 2 and transmit the information to the control chip. When the temperature of the lamp panel 2 exceeds the preset threshold, the control chip sends a control signal to the micro relay, causing the contacts of the micro relay to be disconnected from the metal electrode, thereby cutting off the power supply to the flexible heating film 3. For example, when the first temperature sensor detects that the temperature of the lamp panel 2 is lower than -20℃, the micro relay remains in a connected state, and the flexible heating film 3 can work. Conversely, when the temperature of the lamp panel 2 is higher than -20℃, the micro relay is disconnected, and the flexible heating film 3 stops working, while the lamp beads on the lamp panel 2 start to work.

[0035] In this embodiment, the flexible heating film 3 has flexibility, which has better attachment effect than rigid plates, can eliminate the gap between the two, avoid attachment of the hollow, and thus prevent overheating problems.

[0036] Further, the first temperature sensor uses a positive temperature coefficient thermistor. When the flexible heating film 3 is powered on, its temperature rises and transmits heat to the lamp panel 2 through the heat-conducting partition 10. At the same time, the resistance of the first temperature sensor increases, causing the loop current to decrease, thereby reducing the output power of the flexible heating film 3, controlling the temperature rise rate of the lamp panel 2, reducing the heat flux density transmitted to the lamp panel 2, and facilitating accurate temperature control of the lamp panel 2 to prevent the lamp panel 2 from overheating.

[0037] Further, the flexible heating film 3 comprises a plurality of parallel electric heating wires 31 and a flexible substrate layer 32 wrapping the electric heating wires 31, both ends of each electric heating wire 31 are connected with an outgoing wire 33 extending out of the flexible substrate layer 32, the outgoing wire 33 is connected with a plug-in connector, the lamp panel 2 is provided with a connector, and the plug-in connector is plugged into the connector.

[0038] Specifically, the flexible substrate layer 32 serves the function of protecting and insulating the electric heating wires 31, and is in a sheet film structure. The outgoing wire 33 of the electric heating wire 31 is connected with the plug-in connector, and the plug-in connector is further electrically connected with the connector of the lamp panel 2. The electric heating wire 31, the outgoing wire 33 and the plug-in connector together constitute an electrical harness, facilitating quick assembly. Since the flexible heating film 3 and the lamp panel 2 are located in two independent cavities respectively, sufficient space is ensured for installing the end cover 4, and the end of the heat-conducting partition plate 10 is provided with a corresponding avoiding groove, so that the flexible heating film 3 can be connected to the connector of the lamp panel 2 after being bent. The plug-in mode of the plug-in connector and the connector improves the stability of the connection of the flexible heating film 3, and compared with the welding connection mode, this method avoids the problem of disconnection during the turnover of the device. In addition, the flexible heating film 3 realizes fine step adjustment of heating power through the temperature sensor. During use, according to the difference between the real-time temperature and the preset temperature of the wall washing lamp, the corresponding power is output to accurately preheat the lamp panel 2, thereby realizing accurate control of the heating power. This not only ensures the normal operation of the wall washing lamp, but also effectively avoids the waste of energy. Exemplarily, the plurality of parallel electric heating wires 31 can be divided into three levels of adjustment, and the total power of the electric heating wires 31 is set to 100%, wherein the first level power can be set to 100%, the second level power can be set to 66.7%, and the third level power can be set to 33.3%.

[0039] Further, the electric heating wire 31 is arranged in a serpentine manner in the flexible substrate layer 32, and the input end and the output end of the electric heating wire 31 are both located on the same side of the flexible substrate layer 32. The electric heating wire 31 is bent in the flexible substrate layer 32 to form a square ring structure, and the number of the electric heating wire 31 can be set to three. The three electric heating wires 31 are arranged in the flexible substrate layer 32 in a nested manner from inside to outside, and can be respectively named as the inner ring electric heating wire 31, the middle ring electric heating wire 31 and the outer ring electric heating wire 31. This design can realize higher arrangement density in a smaller area of the flexible substrate layer 32, ensure more uniform heat distribution, and improve the uniformity and bending adaptability of heating, and effectively avoid local overheating. When the real-time temperature of the wall washer lamp is low, the controller can activate the three electric heating wires 31 at the same time. During the temperature rising process of the lamp panel 2, the controller will control the on-off of one or two of the inner ring electric heating wire 31, the middle ring electric heating wire 31 and the outer ring electric heating wire 31 according to the difference between the real-time temperature and the preset temperature, so as to ensure that when the temperature of the lamp panel 2 approaches the preset value, the heat flux density transmitted to the lamp panel 2 is reduced. In some embodiments, the electric heating wire 31 is a flexible electric heating wire. Specifically, the electric heating wire 31 can adopt a common metal resistance wire, or a flexible PTC electric heating wire, etc.

[0040] Further, the flexible substrate layer 32 is composed of two layers of 25 μm thick HN type polyimide film hot-pressed (hot-pressing temperature 180°C / pressure 0.8MPa). Correspondingly, the protective layer can also adopt a polyimide film. Compared with the traditional heating sheet, the polyimide film is lighter in weight, and its use temperature range is -200-300°C, which has flexibility and can be designed into a corresponding shape according to the needs of different lamp types.

[0041] The heat-conducting partition plate 10 is made of aluminum material, and its thermal conductivity is about 200 W / m.K. However, it still shows a certain heat conduction delay. Specifically, there is a significant temperature difference between the flexible heating plate, the heat-conducting partition plate 10 and the lamp plate 2. When the temperature of the flexible heating film 3 reaches 20℃, the temperature of the heat-conducting partition plate 10 can be only 0℃, and the temperature of the lamp plate 2 can be reduced to -20℃. In this case, although the flexible heating film 3 is in a power-off state, the residual heat of the flexible heating film 3 and the heat-conducting partition plate 10 will still be transferred to the lamp plate 2, thereby reducing the accuracy of temperature control. Although the temperature of the lamp plate 2 is higher than -20℃ and does not affect the normal operation of the wall washer lamp, it can adversely affect the user experience. In order to improve the control accuracy of the temperature of the lamp plate 2, the wall washer lamp device is also provided with a protective layer which is tightly attached to the outer surface of the flexible substrate layer 32 away from the heat-conducting partition plate 10. A second temperature sensor is installed between the protective layer and the flexible substrate layer 32, which is connected to the controller. Through this configuration, the insulation performance can be enhanced and double temperature monitoring can be achieved, thereby improving the accuracy of temperature control and preventing the lamp plate 2 from overheating or being insufficiently heated. For example, when the temperature of the lamp plate 2 is reduced to -25℃ and the temperature of the flexible heating film 3 is higher than this value, the controller can cut off the power supply of the lamp plate 2 to the flexible heating film 3 in advance, and use the residual heat of the flexible heating film 3 and the heat-conducting partition plate 10 to heat the lamp plate 2.

[0042] In addition, in order to improve the heat transfer efficiency between the lamp plate 2, the heat-conducting partition plate 10 and the flexible heating film 3, improve the heat flux and avoid the problem of dry burning or poor heat transfer of the flexible heating film 3, on the basis of the above specific embodiments, a heat-conducting medium layer is provided between the heat-conducting partition plate 10 and the lamp plate 2, and similarly, a heat-conducting medium layer is provided between the heat-conducting partition plate 10 and the flexible heating film 3. By providing the heat-conducting medium layer, the preheating effect of the wall washer lamp can be improved through the efficiency of heat conduction. In some embodiments, one or more of heat-conducting silicone grease, heat-conducting silicone rubber gasket, metal foil, natural graphite sheet and artificial graphite film can be provided between the heat-conducting partition plate 10 and the flexible heating film 3 and the lamp plate 2. Specifically, when the metal foil, the natural graphite sheet and the artificial graphite film are selected, the heat-conducting silicone rubber gasket or the heat-conducting silicone grease can be compounded to improve the lateral conduction of heat, balance the heating and cooling demand, and avoid high temperature damage to electronic components.

[0043] Further, in order to improve the assembly effect of the wall washer lamp, the heat-conducting partition plate 10 can be detachably installed in the groove, or can be integrally formed with the radiator 1. When the heat-conducting partition plate 10 is integrally formed with the radiator 1, the radiator 1 comprises a frame 11 and a bottom plate 12. The bottom plate 12 is connected with the radiator 1 by bolts, and a third sealing structure is arranged at the connection between the bottom plate 12 and the radiator 1, such as a waterproof rubber strip adapted to the connection between the bottom plate 12 and the frame 11, so as to improve the waterproof protection of the heating film. Alternatively, in order to improve the assembly efficiency, the bottom plate 12 is provided with a clamping groove extending along the length direction of the bottom plate 12, and the bottom of the radiator 1 is provided with a clamping rail matched with the clamping groove. In this way, the assembly personnel can quickly align and install. When the heat-conducting partition plate 10 is detachably installed on the radiator 1, the lamp plate 2 and the flexible heating film 3 are first installed on the lamp plate 2 by means of double-sided adhesive tape and screws, and then the heat-conducting partition plate 10 is placed in the radiator 1.

[0044] Further, the connection between the radiator 1 and the end cover 4 is provided with a first sealing structure, the connection between the radiator 1 and the light-transmitting panel 5 is provided with a second sealing structure, and the connection between the bottom plate 12 and the radiator 1 is provided with a third sealing structure.

[0045] The above has described various embodiments of the present application, and the above description is exemplary and is not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles, practical applications, or improvements to the technology in the market of the embodiments, or to enable other ordinary skilled persons in the art to understand the disclosed embodiments.

Claims

1. A low temperature resistant downlight, characterized in that, The application relates to a heat dissipation device, which comprises the following parts: a heat dissipation device (1) internally provided with a heat-conducting partition plate (10) extending in the length direction, the heat-conducting partition plate (10) separating the inner cavity of the heat dissipation device (1) into a first cavity and a second cavity, both ends of the heat dissipation device (1) being provided with end covers (4), and the first cavity being provided with a light-transmitting panel (5); a lamp panel (2) located in the first cavity and attached to the heat-conducting partition plate (10); a flexible heating film (3) located in the second cavity and attached to the heat-conducting partition plate (10); and a temperature control system comprising a first temperature sensor and a controller integrated on the lamp panel (2), the controller being connected to the flexible heating film (3), and the controller controlling the start and stop of the flexible heating film (3) according to the signal of the first temperature sensor. The flexible heating film (3) comprises a plurality of parallel electric heating wires (31) and a flexible substrate layer (32) wrapping the electric heating wires (31), both ends of each electric heating wire (31) being connected to an extension wire (33) extending out of the flexible substrate layer (32), the extension wire (33) being connected to a plug-in connector, and the lamp panel (2) being provided with a connector into which the plug-in connector is plugged. The electric heating wire (31) is arranged in a serpentine shape in the flexible substrate layer (32), and the input end and the output end of the electric heating wire (31) are located on the same side of the flexible substrate layer (32). The electric heating wire (31) is a metal resistance wire. The flexible substrate layer (32) is made of two layers of polyimide films which are hot-pressed and combined.

2. The low temperature resistant down lamp of claim 1, wherein, A protective layer is further arranged on the outer surface of the flexible substrate layer (32) away from the heat-conducting partition plate (10), a second temperature sensor is arranged between the protective layer and the flexible substrate layer (32), and the second temperature sensor is connected to the controller.

3. The low temperature resistant down lamp of claim 2, wherein, The contact surfaces of the heat-conducting partition plate (10), the lamp panel (2) and the flexible heating film (3) are all provided with a heat-conducting medium layer.

4. The low temperature resistant down lamp of claim 3, wherein, The heat dissipation device (1) comprises a frame (11) and a bottom plate (12), the frame (11) and the heat-conducting partition plate (10) being integrally formed, and the bottom plate (12) being detachably arranged at the bottom of the frame (11).

5. The low temperature resistant down lamp of claim 2, wherein, First sealing structures are arranged at the connection between the heat dissipation device (1) and the end covers (4), second sealing structures are arranged at the connection between the heat dissipation device (1) and the light-transmitting panel (5), and third sealing structures are arranged at the connection between the bottom plate (12) and the frame (11).

6. The low temperature resistant down lamp of claim 5, wherein, ​ 7. The low temperature resistant down lamp of claim 1, wherein, ​ 8. The low temperature resistant down lamp of claim 1, wherein, ​ 9. The low temperature resistant down lamp of claim 8, wherein, ​

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