High-luminous-efficiency lamp

Abstract

The utility model discloses a high-luminous-efficiency lamp which comprises a heat conduction substrate, a light source installation face is arranged on the top of the heat conduction substrate, and the bottom of the heat conduction substrate is connected with a heat dissipation assembly. A flow guide pipe matched with the heat conduction substrate is arranged in the middle of the heat conduction substrate. An air inlet cover matched with the heat conduction substrate is arranged at the bottom end of the heat conduction substrate, a plurality of heat dissipation fins are arranged between the air inlet cover and the heat conduction substrate, and the heat dissipation fins are distributed around the periphery of the heat conduction substrate. Cold air is sucked in from the bottom of the air inlet cover for heat exchange, then hot air is exhausted in an accelerated mode through the flow guide pipe, negative pressure suction is formed through the chimney effect, air circulation is achieved completely depending on structural design, fan or circuit control is not needed, and energy consumption and maintenance cost are reduced. The rising speed of hot air is enhanced through the gradually-shrinking design, the auxiliary air holes and the auxiliary cooling fins can form a secondary heat dissipation path, external cold air is sucked through negative pressure, supplementary airflow is guided, the overall heat dissipation efficiency is improved, and the lighting effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of lighting technology, and in particular to a high-efficiency lighting fixture. Background Technology

[0002] With the popularization of LED lighting technology, high-efficiency lamps have increasingly stringent requirements for heat dissipation performance. Traditional heat dissipation solutions mainly rely on large-area metal heat sinks or forced air cooling devices. Conventional heat sink designs are simple, with short and disordered airflow paths, resulting in low heat exchange efficiency. This leads to excessively high LED chip temperatures and accelerated luminous efficacy decay. Active cooling solutions, which use fans or liquid cooling systems, are also available. However, these require additional power supplies and increase circuit complexity, resulting in drawbacks such as high noise, high failure rate, and increased energy consumption. Common heat dissipation structures, such as those using heat sinks or guide pipes, are mostly fixed and cannot adjust the heat dissipation intensity according to ambient temperature or lamp power, making it difficult to meet the needs of diverse application scenarios. Therefore, there is an urgent need for a technical solution that achieves efficient passive heat dissipation without electronic control, solely through structural innovation. Utility Model Content

[0003] The purpose of this utility model is to address the deficiencies in the existing technology by proposing a high-efficiency lamp.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A high-efficiency lamp includes: a thermally conductive substrate, wherein the top of the thermally conductive substrate is provided with a light source mounting surface and the bottom is connected to a heat dissipation component;

[0006] A flow guide tube is provided in the middle of the thermally conductive substrate to cooperate with it;

[0007] The bottom end of the thermally conductive substrate is provided with an air inlet shroud that cooperates with it. A number of heat dissipation fins are provided between the air inlet shroud and the thermally conductive substrate. The heat dissipation fins are distributed around the outer periphery of the thermally conductive substrate, and airflow channels are formed between adjacent heat dissipation fins.

[0008] Furthermore, the flow guide tube vertically penetrates the central region of the heat-conducting substrate, and its inner diameter gradually increases from the bottom to the top.

[0009] Furthermore, the air inlet shroud has a conical structure, and the opening of the air inlet shroud faces downward and has a diameter larger than the top outlet of the guide pipe.

[0010] Furthermore, the inner wall of the guide tube is provided with guide ribs distributed along the axial direction. The guide ribs are arc-shaped structures, and the diameter of the smallest circumferential area formed by a plurality of the guide ribs is smaller than the minimum port diameter of the guide tube.

[0011] Furthermore, the surface of the heat dissipation fins has a wavy structure, and both ends of the heat dissipation fins are provided with rotating shafts. Both ends of the rotating shafts are provided with rotating rings that cooperate with the heat-conducting substrate and the air inlet shroud.

[0012] Furthermore, the rotating ring is rotatably connected to the heat-conducting substrate and the air inlet shroud. The rotating rings located at the heat-conducting substrate and the air inlet shroud are respectively engaged with a plurality of rotating shafts located at different circumferences. The circumferential edge of the rotating ring is provided with a toggle piece that engages with it.

[0013] Furthermore, an annular groove is formed on the outer wall of the thermally conductive substrate, and a plurality of auxiliary air holes connected to the guide pipe are provided in the annular groove. A plurality of auxiliary heat sinks are provided in the auxiliary air holes, and the auxiliary heat sinks extend out of the outer edge of the annular groove and extend downward to form an angle with the heat sink fins.

[0014] Furthermore, an arc-shaped transition surface is provided between the inner edge of the air intake shroud and the bottom end of the heat dissipation fins.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: through the coordinated design of the heat-conducting substrate, the air guide pipe, the air inlet shroud and the heat dissipation fins, a dual-channel heat dissipation system for natural convection of cold and hot air is formed. Cold air is drawn in from the bottom of the air inlet shroud for heat exchange, and then hot air is accelerated out through the air guide pipe. The negative pressure suction is formed by utilizing the "chimney effect". The air circulation is achieved entirely by structural design, without the need for fans or circuit control, thus reducing energy consumption and maintenance costs.

[0016] The tapered design enhances the upward speed of hot air, while the flared structure of the air inlet increases the area for cold air intake. The combination of these two elements increases the amount of air exchanged per unit time. In addition, the guide ribs and narrow areas accelerate airflow, further reducing airflow resistance and improving the chimney effect efficiency. Throughout the process, the heat dissipation fins adjust the airflow channel through the rotating shaft and the actuating fins. The auxiliary vents and auxiliary heat dissipation fins can form a secondary heat dissipation path, drawing in external cold air through negative pressure and guiding supplementary airflow to improve overall heat dissipation efficiency and increase light efficiency. Attached Figure Description

[0017] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0018] Figure 1 This is one of the overall structural schematic diagrams of the high-efficiency lamp proposed in this utility model;

[0019] Figure 2 This is the second schematic diagram of the overall structure of the high-efficiency lamp proposed in this utility model;

[0020] Figure 3 This is an internal schematic diagram of the high-efficiency lamp proposed in this utility model;

[0021] Figure 4 This is a cross-sectional view of the heat-conducting substrate of the high-efficiency lamp proposed in this utility model;

[0022] Figure 5 This is a cross-sectional view of the air inlet cover of the high-efficiency lamp proposed in this utility model.

[0023] In the figure: 1. Thermal conductive substrate; 2. Air guide tube; 3. Air inlet shroud; 4. Heat dissipation fins; 5. Air guide ribs; 6. Rotating shaft; 7. Rotating ring; 8. Actuating plate; 9. Annular groove; 10. Auxiliary air hole; 11. Auxiliary heat dissipation fin; 12. Arc-shaped transition surface. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Reference Figure 1-5 A high-efficiency lamp includes: a thermally conductive substrate 1, wherein the top of the thermally conductive substrate 1 is provided with a light source mounting surface and the bottom is connected to a heat dissipation component;

[0027] A flow guide tube 2 is provided in the middle of the heat-conducting substrate 1 to cooperate with it;

[0028] The bottom end of the thermally conductive substrate 1 is provided with an air inlet shroud 3 that cooperates with it. A plurality of heat dissipation fins are provided between the air inlet shroud 3 and the thermally conductive substrate 1. The heat dissipation fins 4 are distributed around the outer periphery of the thermally conductive substrate 1, and airflow channels are formed between adjacent heat dissipation fins 4. In a specific embodiment, the thermally conductive substrate 1 is equipped with a light source mounted on a plane through an LED light source. The heat of the LED light source is transferred to the heat dissipation fins 4 and the air guide tube 2 through the thermally conductive substrate 1. Cold air enters from the bottom of the air inlet shroud 3 and flows along the channels between the heat dissipation fins 4. At the same time, hot air is discharged through the air guide tube 2, forming convection heat dissipation.

[0029] The flow guide tube 2 vertically penetrates the central region of the heat-conducting substrate 1, and its inner diameter gradually increases from the bottom to the top.

[0030] The air inlet shroud 3 has a conical structure. The opening of the air inlet shroud 3 faces downward and its diameter is larger than the top outlet of the guide pipe 2. In a specific embodiment, the guide pipe 2 vertically penetrates the center of the heat-conducting substrate 1, and its inner diameter gradually expands from the bottom to the top, forming a gradual airflow structure. The air inlet shroud 3 is conical, with its opening facing downward and its diameter larger than the top outlet of the guide pipe 2. The guide pipe 2 and the air inlet shroud 3 form a gradual airflow contraction, which accelerates the flow of hot air. The flared structure of the air inlet shroud 3 increases the cold air intake area. After the cold air enters from the bottom of the air inlet shroud 3, it flows along the spiral channel between the outer wall of the guide pipe 2 and the heat dissipation fins 4, which prolongs the heat exchange time.

[0031] The inner wall of the guide pipe 2 is provided with axially distributed guide ribs 5. The guide ribs 5 are arc-shaped structures. The smallest circumferential area formed by several guide ribs 5 has a diameter smaller than the smallest port diameter of the guide pipe 2. In a specific embodiment, the inner wall of the guide pipe 2 is provided with axially distributed arc-shaped guide ribs 5. The smallest circumferential area formed by multiple guide ribs 5 has a diameter smaller than the port diameter of the guide pipe 2. When the guide ribs 5 guide the flow of hot air, the narrow area formed by the guide ribs 5 accelerates the airflow speed and further enhances the chimney effect.

[0032] The surface of the heat dissipation fin 4 has a wave-shaped structure. Both ends of the heat dissipation fin 4 are provided with a rotating shaft 6. Both ends of the rotating shaft 6 are provided with a rotating ring 7 that cooperates with the heat-conducting substrate 1 and the air inlet shroud 3.

[0033] The rotating ring 7 is rotatably connected to the heat-conducting substrate 1 and the air inlet shroud 3. The rotating ring 7 located at the heat-conducting substrate 1 and the air inlet shroud 3 respectively cooperates with a plurality of rotating shafts 6 located at different circumferences. The circumferential edge of the rotating ring 7 is provided with a toggle piece 8 that cooperates with it. In a specific embodiment, the surface of the heat dissipation fin 4 has a wavy structure and rotating shafts 6 are provided at both ends. The rotating shafts 6 are connected to the rotating ring 7 on the heat-conducting substrate 1 and the air inlet shroud 3. The rotating ring 7 is provided with a toggle piece 8 on its edge. The angle of the heat dissipation fin 4 can be adjusted by external force. By rotating the toggle piece 8, the rotating ring 7 and the rotating shaft 6 are driven to change the tilt angle of the heat dissipation fin 4, thereby adjusting the width and angle of the airflow channel to adapt to different heat dissipation requirements and heat dissipation environments. Similarly, in one embodiment, the heat dissipation fin 4 is covered with an annular heat dissipation plate. This plate can be removed and is used to protect the space outside the heat dissipation fin 4. By adjusting the angle of the heat dissipation fin 4, the heat dissipation fins 4 can be made to overlap each other to reduce the gap.

[0034] An annular groove 9 is formed on the outer wall of the heat-conducting substrate 1. Several auxiliary air holes 10 connected to the guide pipe 2 are provided in the annular groove 9. Several auxiliary heat sinks 11 are provided in the auxiliary air holes 10. The auxiliary heat sinks 11 extend out of the outer edge of the annular groove 9 and extend downward to form an angle with the heat dissipation fins 4. In a specific embodiment, an annular groove 9 is formed on the outer wall of the heat-conducting substrate 1. The groove is provided with auxiliary air holes 10 and auxiliary heat sinks 11 extending out of the groove. The auxiliary heat sinks 11 extend downward and form an angle with the heat dissipation fins 4. The airflow accelerated at the guide pipe 2 will form a negative pressure, causing the air at the annular groove 9 to be drawn in, accelerating the outflow of hot airflow, and at the same time, fresh air can be introduced as much as possible. In addition, secondary heat dissipation can also be performed through the auxiliary heat sinks 11. The angle design between the auxiliary heat sinks 11 and the heat dissipation fins 4 can guide the airflow downward to supplement the cold air input of the air inlet shroud 3.

[0035] An arc-shaped transition surface 12 is provided between the inner edge of the air intake shroud 3 and the bottom end of the heat dissipation fin 4. The inner edge of the air intake shroud 3 and the bottom heat dissipation fin 4 are smoothly connected by the arc-shaped transition surface 12. The arc-shaped transition surface 12 eliminates the airflow dead zone between the air intake shroud 3 and the heat dissipation fin 4, ensuring that cold air enters the airflow channel smoothly and avoiding energy loss caused by turbulence.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high efficacy luminaire, characterized by, The utility model relates to a heat dissipation device for light source, which comprises: a heat-conducting substrate (1) having a light source mounting surface on the top and a heat dissipation assembly connected to the bottom; a flow guide pipe (2) is arranged at the middle position of the heat-conducting substrate (1) and cooperates with the heat-conducting substrate (1); a plurality of heat dissipation fins (4) are arranged between the heat-conducting substrate (1) and an air inlet cover (3) arranged at the bottom end of the heat-conducting substrate (1), the heat dissipation fins (4) are distributed around the outer periphery of the heat-conducting substrate (1), and air flow channels are formed between adjacent heat dissipation fins (4).

2. The high efficacy lamp of claim 1, wherein, The flow guide pipe (2) vertically penetrates the central region of the heat-conducting substrate (1), and the inner diameter of the flow guide pipe (2) gradually increases from the bottom end to the top end.

3. The high efficacy lamp of claim 2, wherein, The air inlet cover (3) is a conical structure, the opening of the air inlet cover (3) faces downward, and the diameter of the opening is greater than the diameter of the top outlet of the flow guide pipe (2).

4. The high efficacy lamp of claim 3, wherein, The inner wall of the flow guide pipe (2) is provided with flow guide ribs (5) distributed in the axial direction, the flow guide ribs (5) are in a circular arc structure, and the smallest circular region formed by a plurality of flow guide ribs (5) has a diameter smaller than the smallest port diameter of the flow guide pipe (2).

5. The high efficacy lamp of claim 4, wherein, The surface of the heat dissipation fin (4) is in a wave shape structure, both ends of the heat dissipation fin (4) are provided with rotating shafts (6), and both ends of the rotating shaft (6) are provided with rotating rings (7) cooperating with the heat-conducting substrate (1) and the air inlet cover (3).

6. The high efficacy lamp of claim 5, wherein, The rotating ring (7) is rotatably connected to the heat-conducting substrate (1) and the air inlet cover (3), the rotating rings (7) located at the heat-conducting substrate (1) and the air inlet cover (3) respectively cooperate with a plurality of rotating shafts (6) located at different circumferences, and the circumferential edge of the rotating ring (7) is provided with a push piece (8) cooperating therewith.

7. The high efficacy lamp of claim 6, wherein, An annular groove (9) is formed in the outer side wall of the heat-conducting substrate (1), a plurality of auxiliary air holes (10) are arranged in the annular groove (9) and communicate with the flow guide pipe (2), a plurality of auxiliary heat dissipation fins (11) are arranged in the auxiliary air holes (10), the auxiliary heat dissipation fins (11) extend out of the outer edge of the annular groove (9) and downwardly extend to form an included angle with the heat dissipation fins (4).

8. The high efficacy lamp of claim 7, wherein, An arc transition surface (12) is arranged between the inner side edge of the air inlet cover (3) and the bottom end of the heat dissipation fin (4).

Images