Forced air draft heat dissipation device
By using a dynamic adjustment structure for the sliding sleeve and baffle, the problems of low efficiency and pressure imbalance caused by fixed heat dissipation holes in existing devices are solved, enabling adaptive adjustment of the exhaust rate and stable operation of the equipment, and reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUHAN RISCO MECHANICAL & ELECTRICAL ENG CO LTD
- Filing Date
- 2025-06-05
- Publication Date
- 2026-05-19
AI Technical Summary
The existing forced ventilation cooling devices have fixed-size vents that cannot be adjusted adaptively, resulting in low efficiency or the risk of internal pressure imbalance under different airflow conditions.
It adopts a sliding sleeve and baffle structure, and realizes dynamic adjustment of the air outlet through spring and airflow pressure. Combined with the gravity sealing mechanism, it ensures that the sliding sleeve slides smoothly when the air pressure changes and automatically adjusts the exhaust channel.
It improves the reliability and efficiency of the device, reduces mechanical wear and maintenance costs, avoids equipment damage caused by pressure fluctuations, and is suitable for special environments such as explosion-proof and moisture-proof environments.
Smart Images
Figure CN224265344U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of exhaust cooling technology, specifically to a forced exhaust cooling device. Background Technology
[0002] Forced air cooling systems are heat dissipation systems that actively generate airflow to forcefully expel heat from inside equipment. They are widely used in electronic equipment, machinery, power installations, and other applications requiring efficient heat dissipation. Their core principle is to use fans or other powered devices to accelerate airflow through suction or blowing, carrying away the heat generated during equipment operation, thereby reducing equipment temperature and ensuring stable operation.
[0003] A search revealed that patent application CN202111550818.7 discloses a concealed air duct forced ventilation cooling structure. While this device achieves some cooling effect through the concealed air duct and exhaust fan, the size of the ventilation holes is fixed and cannot adaptively adjust to the varying heat generated by the motor. When the cooling fan operates at low speed and the output airflow is small, the fixed-size ventilation holes remain large, preventing the airflow from forming effective pressure and resulting in low cooling efficiency. Conversely, when the cooling fan operates at high speed and the output airflow increases, the fixed ventilation holes cannot fully release the high-speed airflow, easily causing airflow accumulation inside the equipment and forming localized high pressure. This not only affects the fan performance but may also lead to internal pressure imbalance, causing component damage or seal failure. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a forced ventilation cooling device, which solves the problems mentioned in the background art.
[0005] The solution of this utility model to the above-mentioned technical problems is as follows:
[0006] A forced-draft cooling device, including an exhaust pipe;
[0007] A sliding sleeve is slidably installed on the exhaust pipe, and a baffle is installed at the end of the sliding sleeve. Protective covers are provided on both sides of the exhaust pipe, and sliding plates are provided on both sides of the sliding sleeve. A first guide rod and a second guide rod are provided inside the protective cover. The sliding plate is slidably installed on the first guide rod and the second guide rod, and a spring is sleeved on the first guide rod between the sliding plate and the protective cover. The sliding sleeve is elastically installed at one end of the exhaust pipe through the spring and the sliding plate.
[0008] The exhaust pipe has an air outlet, and the sliding sleeve is located at the air outlet.
[0009] Based on the above technical solution, the present invention can be further improved as follows.
[0010] Furthermore, a gap is left between the protective cover and the sliding sleeve.
[0011] The beneficial effects of adopting the above-mentioned further solutions are:
[0012] This gap provides ample space for the sliding sleeve to move, effectively preventing direct friction or jamming between the sleeve and the protective cover during pressure-driven expansion and contraction. This ensures that the sleeve can slide smoothly and steadily along the exhaust pipe axis under the action of spring force and airflow pressure. This not only improves the reliability of the device operation and reduces the risk of failure due to component interference, but also reduces mechanical wear and extends the service life of components such as the sleeve and protective cover, thereby reducing the overall maintenance cost of the device and ensuring the long-term stable operation of the forced ventilation cooling device.
[0013] Furthermore, the sliding sleeve blocks the air outlet through the elastic force of the spring.
[0014] The beneficial effects of adopting the above-mentioned further solutions are:
[0015] The preload of the spring ensures that the sliding sleeve fits tightly against the outer wall of the exhaust pipe in its initial state, completely covering the exhaust port. This prevents airflow leakage from the exhaust port under low pressure conditions and ensures the controllability of the exhaust path. When pressure fluctuations are small, the elastic restoring force of the spring quickly pushes the sliding sleeve back to the blocked position, avoiding unstable exhaust efficiency caused by frequent opening of the exhaust port. This design also simplifies the control logic, enabling automatic opening and closing of the exhaust port without the need for additional sensors or electronic control systems, reducing manufacturing costs and the risk of failure.
[0016] Furthermore, when the pressure inside the exhaust pipe increases, the sliding sleeve is pushed by the high-pressure airflow, exposing the exhaust port of the exhaust pipe and increasing the exhaust rate through the exhaust port.
[0017] The beneficial effects of adopting the above-mentioned further solutions are:
[0018] This design enables dynamic adjustment of the exhaust rate. When the pressure inside the pipe rises to a set threshold, the sliding sleeve is pushed to compress the spring, exposing the exhaust port and instantly increasing the exhaust area. This creates a dual-path structure of "main exhaust channel (baffle open) + auxiliary exhaust channel (exhaust port)," significantly improving exhaust efficiency. This pressure adaptive mechanism can quickly release excessive pressure inside the pipe, preventing equipment damage or reduced heat dissipation efficiency due to pressure accumulation, and effectively improving system stability.
[0019] Furthermore, the baffle hangs down under its own weight to seal the end of the sliding sleeve, and the baffle opens and exhausts air through the high-pressure airflow in the exhaust pipe.
[0020] The beneficial effects of adopting the above-mentioned further solutions are:
[0021] The gravity-sealed structure features fail-safe characteristics—when the device loses power or external power, the baffle automatically droops to seal the end of the sliding sleeve, preventing dangerous gas leakage or foreign objects from entering the exhaust pipe, thus improving system safety. The high-pressure airflow opening mechanism achieves energy-free automatic control: when the pressure inside the pipe reaches the opening threshold, the upward thrust of the airflow overcomes the weight of the baffle, causing it to rotate around the hinge point and open, forming an exhaust channel; after the pressure decreases, the baffle automatically resets. This design avoids the energy consumption problems of traditional solenoid or mechanical valves, while reducing the number of moving parts, lowering maintenance frequency and costs, and making it suitable for special environments such as explosion-proof and moisture-proof applications.
[0022] This utility model provides a forced ventilation cooling device. It has the following beneficial effects:
[0023] The baffle seals the end of the sliding sleeve by gravity. When the air pressure inside the exhaust pipe is low, the baffle remains closed due to its own weight, preventing backflow of external airflow or dust from entering. When the air pressure rises to a certain threshold, the high-pressure airflow pushes open the baffle to exhaust the air. No additional driving device is required, making it energy-saving and structurally simple. The sliding sleeve is elastically installed by a spring. When the air pressure increases, the sliding sleeve is pushed to compress the spring, exposing the exhaust port. This dual mechanism of increasing the exhaust channel (baffle opening + exposed exhaust port) improves the exhaust rate, quickly releasing internal pressure and preventing the equipment from being affected by excessive pressure.
[0024] The sliding plates on both sides of the sleeve are limited by the first and second guide rods. The double guide rod structure ensures that the sleeve moves linearly along the axis of the exhaust pipe, avoiding skew and jamming during sliding and improving the reliability of the device. A spring is sleeved on the first guide rod, with one end abutting against the sliding plate and the other end abutting against the protective cover. It provides a restoring force while assisting in guidance, enabling the sleeve to respond quickly and stably to pressure changes.
[0025] By dynamically balancing the spring force and airflow pressure, the device can maintain a stable exhaust rate within a certain pressure range, avoiding fluctuations in heat dissipation efficiency caused by pressure fluctuations. It is especially suitable for scenarios that require continuous and stable heat dissipation. Attached Figure Description
[0026] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.
[0027] In the attached diagram:
[0028] Figure 1 This is a schematic diagram of the main appearance of the present utility model;
[0029] Figure 2 This is a schematic diagram of the extended sliding sleeve of this utility model;
[0030] Figure 3 This is a front view schematic diagram of the cross-sectional structure of the protective cover of this utility model;
[0031] Figure 4 This is a rear view schematic diagram of the cross-sectional structure of the protective cover of this utility model.
[0032] The attached diagram lists the components represented by each number as follows:
[0033] 1. Exhaust pipe; 101. Protective cover; 102. Air outlet; 103. First guide rod; 104. Second guide rod; 105. Spring; 2. Sliding sleeve; 201. Baffle; 202. Slide plate. Detailed Implementation
[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0035] Please see Figures 1 to 4 As shown, the embodiments provided by this utility model are as follows: Example
[0036] A forced-draft cooling device includes an exhaust pipe 1, a sliding sleeve 2 slidably mounted on the exhaust pipe 1, and a baffle 201 installed at the end of the sliding sleeve 2. The baffle 201 hangs down under its own weight to seal the end of the sliding sleeve 2, and opens to exhaust gas through the high-pressure airflow inside the exhaust pipe 1. The gravity-type sealing structure has fail-safe characteristics—when the device is powered off or loses external power, the baffle 201 will automatically hang down to seal the end of the sliding sleeve 2, preventing dangerous gas leakage or foreign objects from entering the exhaust pipe 1, thus improving system safety. The high-pressure airflow opening mechanism achieves energy-free automatic control: when the pressure inside the pipe reaches the opening threshold, the upward thrust of the airflow overcomes the gravity of the baffle 201, causing the baffle 201 to rotate around the hinge point and open, forming an exhaust channel; after the pressure decreases, the baffle 201 automatically resets. This design avoids the energy consumption problem of traditional solenoid valves or mechanical valves, while reducing the number of moving parts, lowering maintenance frequency and cost, and is suitable for special environments such as explosion-proof and moisture-proof. The exhaust pipe 1 is equipped with a protective cover 101 on both sides, and a gap is left between the protective cover 101 and the sliding sleeve 2. This gap provides sufficient space for the sliding sleeve 2 to slide, effectively preventing the sliding sleeve 2 from directly rubbing or getting stuck with the protective cover 101 when it moves in extension and retraction under pressure. This ensures that the sliding sleeve 2 can slide smoothly and steadily along the axis of the exhaust pipe 1 under the action of the spring force 105 and the airflow pressure. This not only improves the reliability of the device operation and reduces the risk of failure due to component interference, but also reduces mechanical wear and extends the service life of components such as the sliding sleeve 2 and the protective cover 101, thereby reducing the overall maintenance cost of the device and ensuring the long-term stable operation of the forced ventilation cooling device. The sliding sleeve 2 is provided with sliding plates 202 on both sides, and the protective cover 101 is provided with a first guide rod 103 and a second guide rod 104. The sliding plate 202 is slidably installed on the first guide rod 103 and the second guide rod 104, and a spring 105 is sleeved on the first guide rod 103 between the sliding plate 202 and the protective cover 101. The sliding sleeve 2 is elastically installed at one end of the exhaust pipe 1 through the spring 105 and the sliding plate 202. Example
[0037] To further improve the pressure adaptive adjustment capability and exhaust efficiency of the heat dissipation device, for example, such as Figures 1 to 4As shown, this utility model also includes: an exhaust pipe 1 with an exhaust port 102, a sliding sleeve 2 located at the exhaust port 102, and the sliding sleeve 2 blocking the exhaust port 102 by the elastic force of a spring 105. The preload of the spring 105 ensures that the sliding sleeve 2 is tightly fitted to the outer wall of the exhaust pipe 1 in the initial state, completely covering the exhaust port 102, preventing airflow leakage from the exhaust port 102 under low pressure conditions, and ensuring the controllability of the exhaust path. When the pressure fluctuation is small, the elastic restoring force of the spring 105 can quickly push the sliding sleeve 2 back to the blocked position, avoiding the problem of unstable exhaust efficiency caused by frequent opening of the exhaust port 102. This design also simplifies the control logic, enabling automatic opening and closing of the exhaust port 102 without the need for additional sensors or electronic control systems. This reduces manufacturing costs and the risk of failure. When the pressure inside the exhaust pipe 1 increases, the sliding sleeve 2 is pushed by the high-pressure airflow, exposing the exhaust port 102. The exhaust rate is increased through the exhaust port 102. This design achieves dynamic adjustment of the exhaust rate—when the pressure inside the pipe rises to a set threshold, the sliding sleeve 2 is pushed to compress the spring 105, exposing the exhaust port 102 and instantly increasing the exhaust area. This forms a dual-path structure of "main exhaust channel (baffle 201 open) + auxiliary exhaust channel (exhaust port 102)," significantly improving exhaust efficiency. This pressure adaptive mechanism can quickly release excessive pressure inside the pipe, avoiding equipment damage or reduced heat dissipation efficiency due to pressure accumulation, and effectively improving system stability.
[0038] Working principle:
[0039] When the device is in low-pressure operation, the baffle 201 hangs down naturally under its own weight, sealing the end of the sliding sleeve 2 to prevent backflow of external airflow and dust from entering. At the same time, under the elastic force of the spring 105, the sliding sleeve 2 completely blocks the air outlet 102 on the exhaust pipe 1, avoiding waste of airflow under low pressure.
[0040] As the pressure inside exhaust pipe 1 gradually increases, the airflow exerts an upward thrust on baffle 201. When the air pressure exceeds the gravity threshold of baffle 201, baffle 201 is pushed open by the high-pressure airflow, forming the first exhaust channel and initiating initial exhaust. As the pressure continues to increase, the airflow pushes the sliding sleeve 2 to slide backward against the elastic force of spring 105, so that the sliding sleeve 2 no longer blocks the exhaust port 102, exposing the exhaust port 102 and forming the second exhaust channel. The two channels work together to significantly increase the exhaust area, quickly expelling the high-pressure gas inside the pipe and reducing the internal pressure.
[0041] When the pressure inside the exhaust pipe 1 decreases, the thrust of the airflow on the baffle 201 and the sliding sleeve 2 weakens. Under the action of gravity, the baffle 201 droops again, sealing the end of the sliding sleeve 2; at the same time, the spring 105 returns to its original deformation, pushing the sliding sleeve 2 forward to slide back to its original position, blocking the exhaust port 102 again, and the device returns to its initial closed state, waiting for the next pressure change to trigger exhaust.
[0042] During continuous operation, the device dynamically adjusts the positions of baffle 201 and sliding sleeve 2 based on the real-time pressure in exhaust pipe 1. At low pressure, only a small amount of exhaust is released through baffle 201; at high pressure, the dual exhaust channels are opened to accelerate heat dissipation, maintaining a dynamic balance between pressure and exhaust efficiency to ensure stable heat dissipation of the equipment.
[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A forced-draft cooling device, comprising an exhaust pipe (1), characterized in that: A sliding sleeve (2) is slidably installed on the exhaust pipe (1). A baffle (201) is installed at the end of the sliding sleeve (2). A protective cover (101) is provided on both sides of the exhaust pipe (1). A sliding plate (202) is provided on both sides of the sliding sleeve (2). A first guide rod (103) and a second guide rod (104) are provided inside the protective cover (101). The sliding plate (202) is slidably installed on the first guide rod (103) and the second guide rod (104). A spring (105) is sleeved on the first guide rod (103) between the sliding plate (202) and the protective cover (101). The sliding sleeve (2) is elastically installed at one end of the exhaust pipe (1) through the spring (105) and the sliding plate (202). The exhaust pipe (1) has an air outlet (102), and the sliding sleeve (2) is located at the air outlet (102).
2. The forced ventilation cooling device according to claim 1, characterized in that: A gap is left between the protective cover (101) and the sliding sleeve (2).
3. The forced ventilation cooling device according to claim 1, characterized in that: The sliding sleeve (2) blocks the air outlet (102) by the elastic force of the spring (105).
4. The forced ventilation cooling device according to claim 1, characterized in that: When the pressure inside the exhaust pipe (1) increases, the sliding sleeve (2) is pushed by the high-pressure airflow, exposing the exhaust port (102) of the exhaust pipe (1), and increasing the exhaust rate through the exhaust port (102).
5. The forced ventilation cooling device according to claim 1, characterized in that: The baffle (201) hangs down under its own weight to seal the end of the sliding sleeve (2), and the baffle (201) opens and exhausts air through the high-pressure airflow in the exhaust pipe (1).