A heat sink and air pump thereof

Abstract

The application relates to the technical field of air pump accessories, in particular to a heat dissipation sleeve and an air pump thereof, wherein the heat dissipation sleeve comprises a containing cavity for containing the air pump, one end of the heat dissipation sleeve is a closed structure, the other end is provided with an opening, at least two groups of air channels are formed in the inner wall of the heat dissipation sleeve, the air channels comprise air inlet channels and air outlet channels, airflow flows into the heat dissipation sleeve from the air inlet channels and flows out from the air outlet channels, the air outlet channels extend from the closed end of the heat dissipation sleeve to the opening end of the heat dissipation sleeve, and the air inlet channels extend from the opening end of the heat dissipation sleeve to the air inlet of the air pump. The application effectively solves the contradiction between noise suppression and heat dissipation enhancement of small air pumps in the prior art.

Description

Technical Field

[0001] This application relates to the field of air pump accessories technology, and in particular to a heat sink and its air pump. Background Technology

[0002] Miniature air pumps, with their compact size and integrated fan blade heat dissipation structure, have significant application value in space-constrained scenarios such as microelectronic devices and portable instruments. However, this type of air pump has two inherent drawbacks during operation: 1. Significant noise pollution: The airflow turbulence and air shearing effect generated by the exposed fan blades at high speeds can cause high-frequency howling, especially in the cavity of enclosed equipment, which can easily lead to resonance, severely limiting its application in noise-sensitive environments (such as medical equipment and baby products); 2. Limited heat dissipation efficiency: The miniaturized design results in a severely insufficient heat dissipation surface area, and the heat exchange efficiency relying solely on forced convection of the fan blades is approaching the physical limit. Especially under continuous high load conditions, the air pump's temperature rise curve is steep, leading to the risk of magnet demagnetization and reduced lifespan of electronic components.

[0003] Current industry-standard improvement solutions include: adding metal heat sink sleeves, which can increase the heat conduction area, but the closed structure obstructs the airflow path and weakens the active heat dissipation capability of the fan blades; filling with thermal grease or adding heat sink fins, which have poor compatibility with miniature scenarios that are sensitive to size and cannot solve the high-frequency noise problem.

[0004] None of the above solutions have been able to simultaneously resolve the contradiction between noise suppression and enhanced heat dissipation: noise reduction measures often come at the cost of sacrificing heat dissipation efficiency, while designs that enhance heat dissipation amplify noise radiation. Therefore, there is an urgent need for an innovative structure that can simultaneously improve the heat dissipation performance and noise characteristics of the air pump while maintaining the advantages of miniaturization. Utility Model Content

[0005] This application provides a heat sink and its air pump to at least resolve the contradiction between noise suppression and heat dissipation enhancement in small air pumps in the related art.

[0006] To achieve the above objectives, this application provides a heat dissipation sleeve, wherein a cavity for accommodating an air pump is formed inside the heat dissipation sleeve, one end of the heat dissipation sleeve is a closed structure and the other end is provided with an opening, and at least two sets of air passages are formed on the inner wall of the heat dissipation sleeve, the air passages include an air inlet passage and an air outlet passage, the airflow flows into the heat dissipation sleeve from the air inlet passage and flows out through the air outlet passage, the air outlet passage extends from the closed end of the heat dissipation sleeve to the open end of the heat dissipation sleeve, and the air inlet passage extends from the open end of the heat dissipation sleeve to the air inlet of the air pump.

[0007] In some embodiments, the air passage has a spiral structure, with the air outlet extending spirally from the closed end of the heat sink to the open end of the heat sink, and the air inlet extending spirally from the open end of the heat sink to the air inlet of the air pump.

[0008] In some embodiments, the air passage is an open structure inside the heat sink.

[0009] In some embodiments, the air passage is a groove-like structure that is coiled on the inner wall of the heat sink and recessed relative to the inner wall of the heat sink, and the inner wall of the heat sink is in contact with the surface of the air pump housed in the heat sink.

[0010] In some embodiments, the air passage is provided with a baffle that is inclined against the airflow direction along its width, and the baffle is equidistantly distributed on the air passage.

[0011] In some embodiments, the outer surface of the heat sink is provided with heat dissipation protrusions corresponding to the location of the air passage.

[0012] In some embodiments, the heat sink sleeve is provided inside for fitting onto the air pump, and the outer wall of the heat sink sleeve has heat dissipation protrusions.

[0013] In some embodiments, the heat dissipation bumps are arranged in a pyramid-shaped array.

[0014] In some embodiments, the sidewall of the heat sink near the opening end is formed with an air inlet hole that connects the inside and outside of the heat sink. One end of the air inlet channel is connected to the air inlet hole, and the other end is connected to the air inlet of the air pump.

[0015] This application also provides an air pump, including a heat dissipation sleeve as described in any of the above claims, the heat dissipation sleeve being fitted onto or integrated into the air pump and guiding the airflow generated by the air pump through the air pump body.

[0016] Based on the above, the advantages of this application's technical solution compared to the prior art are:

[0017] 1. At least two sets of spiral air channels are formed on the inner wall of the heat sink, and the air inlet and outlet channels form an airflow circuit, so that there is a continuous and flowing airflow in the heat sink to achieve active directional air cooling for the air pump. The heat sink is made of silicone material, which can effectively reduce the noise of the air pump.

[0018] 2. A pyramid array of heat dissipation bumps is formed on the surface of the heat sink, which further enhances the heat dissipation effect of the heat sink;

[0019] 3. The airway is equipped with a flow disruptor that moves against the airflow direction, thereby achieving noise reduction by disturbing the airflow. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0021] Figure 1 This is a schematic diagram of the heat sink and air pump assembly according to an embodiment of this application;

[0022] Figure 2 This is an exploded view of an embodiment of this application;

[0023] Figure 3 This is a schematic diagram of the air intake and air outlet in an embodiment of this application;

[0024] Figure 4 This is a cross-sectional view of the heat sink, heat conduction sleeve, and air pump assembly according to an embodiment of this application;

[0025] Figure 5 This is a cross-sectional view of the heat sink according to an embodiment of this application;

[0026] Figure 6 This is a schematic diagram of the heat sink structure according to an embodiment of this application;

[0027] Figure 7 This is a schematic diagram of the heat-conducting sleeve structure according to an embodiment of this application;

[0028] Figure 8 This is a schematic diagram of the tilted state of the baffle in the airway according to an embodiment of this application.

[0029] Explanation of reference numerals in the attached drawings: 1. Heat sink sleeve; 1.1. Closed end; 1.2. Open end; 1.3. Air inlet; 1.4. Air outlet; 2. Air pump; 3.1. Air inlet; 4. Baffle; 5. Heat dissipation protrusion; 6. Heat conduction sleeve; 7. Air inlet. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application. Furthermore, it is understood that although the efforts made in such a development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, modifications to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0031] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0032] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms “a,” “an,” “an,” “the,” and similar words used in this application do not indicate quantity limitation and may indicate singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to these processes, methods, products, or devices. The terms “connected,” “linked,” “coupled,” and similar words used in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. “Multiple” used in this application means two or more. “And / or” describes the relationship between related objects, indicating that three relationships may exist; for example, “A and / or B” can represent: A alone, A and B simultaneously, and B alone. The terms “first,” “second,” “third,” etc., used in this application are merely to distinguish similar objects and do not represent a specific ordering of the objects.

[0033] This application provides a heat sink with an internal cavity for housing an air pump. One end of the heat sink is closed and the other end is open. The inner wall of the heat sink has at least two sets of air passages, including an inlet passage and an outlet passage. Airflow flows into the heat sink from the inlet passage and flows out through the outlet passage. The outlet passage extends from the closed end of the heat sink to the open end of the heat sink, and the inlet passage extends from the open end of the heat sink to the air inlet of the air pump.

[0034] This application also provides an air pump, including the aforementioned heat sink, which is fitted or integrated onto the air pump and guides the airflow generated by the air pump through the air pump body.

[0035] Implementation, for example Figures 1-8As shown, a heat dissipation sleeve 1 is made of high-elasticity silicone with a thermal conductivity ≥3.0W / (m·k) and a Shore hardness of 40~60A. It can tightly cover the surface of the air pump 3 and has good thermal conductivity, while also having shock absorption and noise reduction performance of more than 6dB.

[0036] Specifically, the heat sink 1 has an internal cavity for housing the air pump 3. One end of the heat sink 1 is a closed structure, and the other end has an opening for installing the air pump 3. The inner wall of the heat sink 1 has at least two sets of spiral air channels (two sets of spiral air channels in this embodiment), and these two sets of air channels have an open structure inside the heat sink 1. Specifically, the air channels are groove-like structures that spiral on the inner wall of the heat sink 1 and are recessed relative to the inner wall of the heat sink 1.

[0037] Specifically, the two sets of air passages are an inlet passage 7 and an outlet passage 2. The outlet passage 2 extends spirally from the closed end 1.1 of the heat sink 1 to the open end 1.2 of the heat sink 1, and the inlet passage 7 extends spirally from the open end 1.2 of the heat sink 1 to the inlet 3.1 of the air pump 3. When the air pump 3 is installed inside the heat sink 1, the inner wall of the heat sink 1 is in contact with the surface of the air pump 3 housed inside the heat sink 1. The grooved air passages create a bidirectional gas flow channel between the heat sink 1 and the surface of the air pump 3, allowing for both inlet and outlet air circulation. The airflow flows into the heat sink 1 from the inlet passage 7 and out through the outlet passage 2, forming a closed airflow loop. Due to the grooved structure of the inlet passage 7 and the outlet passage 2, the airflow through the air pump 3 during circulation facilitates the uniform temperature of the air pump 3 throughout its entire range.

[0038] Furthermore, when the number of airways is greater than two sets, there can be multiple combinations, such as one set of air inlets 7, two sets of air outlets 2, or any combination of two sets of air inlets 7 and two sets of air outlets 2.

[0039] Furthermore, the heat sink 1 has an air inlet 1.3 forming on the side wall near the opening end 1.2, connecting the inside and outside of the heat sink 1. One end of the air inlet duct 7 is connected to the air inlet 1.3, and the other end, after circling around the air pump 3, is connected to the air inlet 3.1 of the air pump 3. The air outlet duct 2 extends to the edge of the opening end 1.2 to facilitate the airflow from the edge of the opening end 1.2. The airflow flows in from the air inlet 1.3, circulates on the surface of the air pump 3 through the air inlet duct 7 until it flows into the air inlet 3.1 of the air pump 3, and is then blown out by the turbine blades of the air pump 3. After passing through the air outlet duct 2 at the closed end 1.1 of the heat sink 1, it circulates along the surface of the air pump 3 until it flows out from the edge of the opening end 1.2 of the heat sink 1, forming one cycle.

[0040] Furthermore, horizontally placed and inclined baffles 4 are respectively provided along the width of the air intake duct 7 and the air outlet duct 2, and the baffles 4 are evenly distributed on the air ducts. The baffles 4 are inclined in the opposite direction to the airflow direction. For example, if the airflow is from direction a to direction b, then the a end of the baffle 4 is closer to the bottom surface of the groove in the air duct than the b end, so that the baffle 4 resists the airflow. The baffles 4 on the air intake duct 7 and the air outlet duct 2 can disrupt the airflow and thus achieve the effect of noise reduction.

[0041] Specifically, in this embodiment, the spoiler 4 is an inclined spoiler.

[0042] Furthermore, heat dissipation protrusions 5 are distributed along the air inlet 7 and air outlet 2 on the outer surface of the heat dissipation sleeve 1. The heat dissipation protrusions 5 can fill the thin-walled area while expanding the heat dissipation area, thereby enhancing the stability of the heat dissipation sleeve 1. The heat dissipation protrusions 5 are arranged in a pyramid-shaped array with a height of 0.6 mm corresponding to the positions of the air inlet 7 and air outlet 2.

[0043] Furthermore, a 3.0mm thick silicone thermal conductive sleeve 6 is installed inside the heat sink 1, and the thermal conductive sleeve 6 is fitted onto the end of the air pump 3 near the opening end 1.2. The thermal conductive sleeve 6 is located between the air pump 3 and the heat sink 1, and heat dissipation protrusions 5 are formed on the outer wall of the thermal conductive sleeve 6. The heat dissipation protrusions 5 of the thermal conductive sleeve 6 are arranged in a pyramid-shaped array structure with a height of 0.2mm. The pyramid microstructure can reduce the contact thermal resistance to 0.1k·m² / W, while providing a buffer stress of 5N / m², and suppressing the attenuation rate of 1000Hz high-frequency vibration by ≥20%.

[0044] Furthermore, the heat sink 1 is provided with one or more protruding fixing parts 1.4 on its exterior. Specifically, four fixing parts 1.4 can be provided, which effectively enhances the durability of the structure, prevents the heat sink 1 from falling off due to friction and collision, and extends the service life of the equipment.

[0045] Furthermore, this application also provides an air pump, including the aforementioned heat dissipation sleeve 1. The heat dissipation sleeve 1 is fitted onto or integrated into the housing of the air pump 3 and guides the airflow generated by the air pump 3 through the main body of the air pump 3 to dissipate heat from the air pump 3.

[0046] Those skilled in the art should understand that the technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A heat dissipation sleeve, characterized in that: The heat sink has an internal cavity for housing the air pump. One end of the heat sink is closed and the other end is open. The inner wall of the heat sink has at least two sets of air passages, including an inlet passage and an outlet passage. Airflow flows into the heat sink from the inlet passage and flows out through the outlet passage. The outlet passage extends from the closed end of the heat sink to the open end of the heat sink, and the inlet passage extends from the open end of the heat sink to the air inlet of the air pump.

2. The heat dissipation sleeve according to claim 1, characterized in that: The air passage has a spiral structure. The air outlet extends spirally from the closed end of the heat sink to the open end of the heat sink, and the air inlet extends spirally from the open end of the heat sink to the air inlet of the air pump.

3. A heat dissipation sleeve according to claim 2, characterized in that: The air passage has an open structure inside the heat sink.

4. A heat dissipation sleeve according to claim 3, characterized in that: The air passage is a groove-like structure that is coiled on the inner wall of the heat sink and recessed relative to the inner wall of the heat sink. The inner wall of the heat sink is in contact with the surface of the air pump housed in the heat sink.

5. A heat dissipation sleeve according to claim 4, characterized in that: The air passage is provided with a baffle that is inclined against the airflow direction along its width, and the baffle is equidistantly distributed on the air passage.

6. A heat dissipation sleeve according to claim 1, characterized in that: The outer surface of the heat sink has heat dissipation protrusions corresponding to the positions of the air passages.

7. A heat dissipation sleeve according to claim 1, characterized in that: The heat dissipation sleeve has a heat-conducting sleeve inside for fitting onto the air pump, and the outer wall of the heat-conducting sleeve has heat dissipation protrusions.

8. A heat dissipation sleeve according to claim 6 or 7, characterized in that: The heat dissipation bumps are arranged in a pyramid-shaped array.

9. A heat dissipation sleeve according to any one of claims 1 to 7, characterized in that: An air inlet is formed on the side wall of the heat sink near the opening end, which connects the inside and outside of the heat sink. One end of the air inlet is connected to the air inlet, and the other end is connected to the air inlet of the air pump.

10. An air pump, characterized in that: Includes the heat dissipation sleeve as described in any one of claims 1 to 9, wherein the heat dissipation sleeve is fitted onto or integrated on the air pump and guides the airflow generated by the air pump through the air pump body.

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