Street lamp cap, heat dissipation shell thereof and street lamp

Abstract

The utility model belongs to the technical field of outdoor lighting equipment, concretely relates to a street lamp head and its heat dissipation casing, street lamp, the device includes: the outer casing, its top is provided with the gas outlet, the inner casing is arranged in the outer casing, and the inner casing with the outer casing forms a interlayer cavity, LED module and power, be arranged in the inner cavity formed by the inner casing, the air inlet pipe, its through the lateral wall of outer casing and inner casing with the inner cavity intercommunication, the connecting hole is arranged on the lateral wall of the inner casing opposite the air inlet pipe, to make the inner cavity with interlayer cavity intercommunication.

Description

Technical Field

[0001] This utility model belongs to the technical field of outdoor lighting equipment, and in particular relates to a street lamp head and its heat dissipation housing, and a street lamp. Background Technology

[0002] High-power LED outdoor streetlights generate a lot of heat when their LED modules and power supplies are in operation. If the heat cannot be dissipated in time, it will lead to accelerated chip light decay and a sharp reduction in lifespan.

[0003] Currently, high-power LED outdoor streetlights mostly employ passive convection cooling structures to improve heat dissipation efficiency: ventilation holes are created in the lamp housing, utilizing the principle of rising hot air to achieve air convection cooling. However, to ensure rapid circulation of the hot air after heat exchange, the ventilation holes are usually located at the top of the lamp head, which severely weakens the lamp's waterproof performance. Some technologies use waterproof and breathable membranes to alleviate this problem, but water ingress still exists in extreme weather conditions such as strong storms and heavy rain, which can easily lead to short circuits.

[0004] Therefore, how to solve the poor waterproof performance of the passive convection heat dissipation structure of high-power LED outdoor street lights is a technical problem that urgently needs to be solved by those skilled in the art.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore, the above description is not considered to constitute prior art information. Utility Model Content

[0006] This disclosure provides at least one street lamp head and its heat dissipation housing, and a street lamp.

[0007] In a first aspect, embodiments of this disclosure provide a street light head, comprising: The outer casing has an air vent at its top; An inner shell is disposed within an outer shell, and a cavity is formed between the inner shell and the outer shell; The LED module and power supply are disposed in the inner cavity formed by the inner housing; An air intake pipe penetrates the sidewalls of the outer shell and the inner shell, and communicates with the inner cavity; A connecting hole is provided on the side wall of the inner housing opposite the air intake pipe to connect the inner cavity with the interlayer cavity.

[0008] In one alternative embodiment, the top edge of the outer casing extends outward to form a roof-like baffle, which is located above and covers the air intake pipe.

[0009] In one alternative embodiment, the vent includes a tubular portion extending upward from the top of the outer casing, the top of the tubular portion being closed, and at least one vent hole being provided on the side wall.

[0010] In one alternative embodiment, the diameter of the air intake pipe is larger than the diameter of the connecting hole.

[0011] In one optional embodiment, a mounting portion is further provided on the side wall of the outer casing, the mounting portion being connected to a mounting sleeve; and, The mounting sleeve is located in front of the air inlet of the air intake pipe and is used to prevent external dust or rainwater from directly entering the air intake pipe.

[0012] Secondly, embodiments of this disclosure also provide a heat dissipation housing for a street lamp head, comprising: The outer casing has an air vent at its top; An inner shell is disposed within an outer shell, and a cavity is formed between the inner shell and the outer shell; An air intake pipe penetrates the sidewalls of the outer shell and the inner shell, and communicates with the inner cavity formed by the inner shell; A connecting hole is provided on the side wall of the inner housing opposite the air intake pipe to connect the inner cavity with the interlayer cavity.

[0013] In one alternative embodiment, the top edge of the outer casing extends outward to form a roof-like baffle, which is located above and covers the sidewall of the outer casing.

[0014] In one alternative embodiment, the vent includes a tubular portion extending upward from the top of the outer casing, the top of the tubular portion being closed, and at least one vent hole being provided on the side wall.

[0015] In one alternative embodiment, the diameter of the air intake pipe is larger than the diameter of the connecting hole.

[0016] Thirdly, this disclosure also provides a street light, including: a light pole, on which the above-mentioned street light head is provided.

[0017] The beneficial effects of this invention are that the LED module and power supply are housed within the inner casing of the streetlight head. An air inlet pipe and connecting holes located on the side wall of the inner casing, in conjunction with the air outlet at the top of the outer casing, form a directional passive convection cooling airflow. This design allows the air exchange required for heat dissipation to be completed externally to the core electrical components. Furthermore, since both the air inlet and outlet channels are located on the side wall, the risk of rainwater that might seep in from the top outlet dripping directly into the cavity containing the core electrical components due to gravity is avoided. This ensures efficient heat dissipation while improving the waterproof performance of the high-power LED outdoor streetlight.

[0018] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and drawings.

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 A perspective view of a street lamp head provided in an embodiment of this disclosure; Figure 2 A perspective view of a street lamp head housing provided in an embodiment of this disclosure; Figure 3 A perspective view of the inner housing of a street lamp head provided in an embodiment of this disclosure; Figure 4 A cross-sectional view of a street lamp head provided in an embodiment of this disclosure; Figure 5 This is a perspective view of a street lamp head equipped with an installation sleeve, provided as an embodiment of the present disclosure.

[0022] In the picture: 100. Outer shell; 110. Air outlet; 111. Exhaust hole; 120. Baffle; 130. Mounting part; 200. Inner shell; 210. Side wall; 220. Connecting hole; 300. Interlayer cavity; 400. LED module; 500. Power supply; 600. Air inlet pipe; 700. Mounting sleeve. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0025] In this document, when an element or layer is referred to as “located,” “joined to,” “connected to,” “attached to,” or “coupled to” another element or layer, it may be directly located, joined, connected, attached to, or coupled to the other element or layer, or there may be intermediate elements or layers present. Conversely, when an element is referred to as “directly on another element or layer,” “directly joined to,” “directly connected to,” “directly attached to,” or “directly coupled to” another element or layer, there may be no intermediate elements or layers present. Other terms used to describe relationships between elements should be interpreted in a similar manner (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and / or” includes any and all combinations of one or more of the related listed items.

[0026] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0027] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0028] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0029] Research has revealed the following drawbacks of existing technologies: Currently, high-power LED outdoor streetlights often employ passive convection cooling structures to improve heat dissipation efficiency. This involves creating ventilation holes in the lamp housing and utilizing the principle of rising hot air to achieve air convection cooling. However, these ventilation holes, designed to ensure airflow, severely compromise the lamp's waterproof performance. Some technologies use waterproof and breathable membranes to mitigate this problem, but water ingress remains a risk under extreme weather conditions such as strong storms and heavy rain, which can easily lead to short circuits.

[0030] Based on the above research, this disclosure provides a street light head with a double-shell structure. The LED module and power supply are set in the inner shell. The inner shell exchanges heat with the outside through the air inlet pipe and connection hole on its side wall, preventing rainwater that may seep in from the air outlet at the top of the outer shell from dripping directly onto the core electrical components due to gravity.

[0031] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventor's contribution to this disclosure.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0034] See Figure 1 and Figure 4This disclosure provides a street light head, including: an outer shell 100 with an air outlet 110 at its top. An inner shell 200 is disposed within the cavity formed by the outer shell 100, and the outer shell 100 is fitted over the inner shell 200 to form a sandwich cavity 300 between the inner shell 200 and the outer shell 100. An air inlet pipe 600 is disposed on the side wall 210 of the outer shell 100 and the inner shell 200 on the same side, and the air inlet pipe 600 penetrates the side wall 210 of the outer shell 100 and the inner shell 200, communicating with the inner cavity formed by the inner shell 200. An LED module 400 and a power supply 500 are housed within the inner cavity formed by the inner shell 200. The LED module 400 and power supply 500 are arranged in parallel. The air inlet pipe 600 is located near the power supply 500. A connection hole 220 is provided on the side wall 210 of the inner shell 200 near the LED module 400 (i.e., the connection hole 220 is positioned opposite the air inlet pipe 600, maximizing the distance between them) to connect the inner cavity with the interlayer cavity 300. Cold air from the outside enters the inner cavity formed by the inner shell 200 through the air inlet pipe 600. After heat exchange, it enters the interlayer cavity 300 through the connection hole 220. The hot air then rises along the path of the interlayer cavity 300 to the top of the inner wall of the outer shell 100, and finally exits through the exhaust hole 111, thus forming a heat exchange circulation path (e.g., ...). Figure 1 and Figure 5 (As shown by the middle arrow). The air exchange required for heat dissipation is completed through external circulation of the core electrical components through the above-mentioned setup. At the same time, since the intake and exhaust channels are both located on the side wall 210, the risk of rainwater that may seep in from the top exhaust port 110 dripping directly into the cavity where the core electrical components are located due to gravity is avoided. Thus, while ensuring efficient heat dissipation, the waterproof performance of high-power LED outdoor street lights is improved.

[0035] See Figure 1 and Figure 2 In some embodiments, Figure 2 This is a schematic diagram showing the inner and outer shells 100 combined together. Figure 3 This is a schematic diagram of the individual outer casing 100. The top edge of the outer casing 100 extends outward to form a ring of eaves-like baffles 120, which are located above and cover the air intake pipe 600. The baffle 120 is integrally formed with the top casing 100, and its horizontal projected area is larger than the projected area of ​​the side wall 210 of the outer casing 100, thus forming a continuous, cantilevered shielding structure above the side wall 210. The inlet of the air intake pipe 600 is located precisely within the vertical projected area covered by this annular baffle 120. Specifically, the baffle 120 is located directly above the air intake pipe 600, and its cantilevered portion completely covers the inlet of the air intake pipe 600. When rainwater or pollutants such as snowflakes mixed with dust fall from directly above or diagonally above the light fixture, they are effectively blocked by this baffle 120.

[0036] See Figure 4 In some embodiments, the vent 110 includes a tubular portion extending vertically upward from the top platform of the housing 100. This tubular portion is integrally formed with the housing 100, creating a raised structure. The top end of the tubular portion is a closed flat or curved surface. A plurality of vent holes 111 are evenly distributed circumferentially on the sidewall 210 of the tubular portion. These vent holes 111 are the sole channel for hot air to escape. Figure 5 The diagram shows at least three symmetrically distributed exhaust ports 111, but those skilled in the art will understand that their number and arrangement can be adjusted as needed. Preferably, the exhaust port 110 is located at the highest point of the outer wall of the housing 100. Hot air inside the lamp head rises and eventually gathers at the top of the housing 100, then smoothly exits through the exhaust ports 111 on the side wall 210 of the tubular portion, forming a continuous and stable cooling airflow. Because the top of the tubular portion is closed, pollutants such as rain and snow falling vertically from directly above the lamp will be completely blocked.

[0037] See Figure 1 and Figure 3 In some embodiments, the diameter of the intake pipe 600 is larger than the diameter of the connecting hole 220. The larger diameter of the intake pipe 600 provides a low-resistance, large-section channel for the initial airflow, which can maximize the capture and guidance of external cooling air, providing sufficient airflow guarantee for the entire heat dissipation duct from the source.

[0038] See Figure 1 and Figure 5 In some embodiments, a mounting portion 130 is further provided on the side wall 210 of the housing 100, which is connected to the mounting sleeve 700; and the mounting sleeve 700 is located in front of the air inlet of the air inlet pipe 600 to prevent external dust or rainwater from directly entering the air inlet pipe 600. The mounting portion 130 is a structural base for fixing the entire lamp head to the lamp post or mounting bracket. It is usually located on the side of the housing 100, integrally formed with the housing 100 or rigidly connected by fasteners. When the lamp head is installed in place by the mounting portion 130 and the mounting sleeve 700, the cylindrical wall of the mounting sleeve 700 is located exactly in front of the inlet of the air inlet pipe 600. Specifically, the mounting sleeve 700 is positioned horizontally between the inlet of the air inlet pipe 600 and the external environment, at least partially blocking the straight path directly to the air inlet. The mounting sleeve 700 acts as a fixed baffle. When dust or rainwater approaches from the side or front of the lamp head, it first impacts the wall of the mounting sleeve 700, thus preventing dust or rainwater from entering the intake pipe 600. Although the mounting sleeve 700 forms a shield, it does not completely seal the airflow passage. External cooling air can still bypass the baffle from above, below, or to the side, and change direction before entering the intake pipe 600.

[0039] See Figure 1 Some embodiments also provide a heat dissipation housing for a street lamp head, comprising: an outer shell 100 having an air outlet 110 at its top; an inner shell 200 disposed within the outer shell 100, forming a sandwich cavity 300 between the inner shell 200 and the outer shell 100; an air inlet pipe 600 penetrating through the sidewalls 210 of the outer shell 100 and the inner shell 200 and communicating with the inner cavity; and a connecting hole 220 disposed on the sidewall 210 of the inner shell 200 opposite to the air inlet pipe 600 to communicate the inner cavity with the sandwich cavity 300.

[0040] Some embodiments also provide a street light, including: a light pole on which a street light head as described in the above embodiments is disposed.

[0041] In summary, this streetlight head integrates the LED module 400 and power supply 500 within the inner housing 200. The air inlet 600 and connection hole 220, located on the side wall 210 of the inner housing 200, work in conjunction with the air outlet 110 on the top of the outer housing 100 to form a directional passive convection cooling airflow. This design allows the air exchange required for heat dissipation to be completed externally to the core electrical components. Furthermore, since both the inlet and outlet channels are located on the side wall 210, the risk of rainwater potentially seeping into the top air outlet 110 and dripping directly into the cavity containing the core electrical components due to gravity is avoided. This ensures efficient heat dissipation while improving the waterproof performance of the high-power LED outdoor streetlight.

[0042] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as the second element, component, region, layer, or segment.

[0044] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0045] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.

[0046] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

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