Filtering device

Abstract

The utility model relates to the technical field of vehicle-mounted equipment, and discloses a filtering device, which comprises a base provided with a first mounting groove; the first elastic piece is arranged at the bottom of the first mounting groove; the mounting seat is arranged on the first elastic piece, a gap is formed between the periphery of the mounting seat and the inner side wall of the first mounting groove, and a second elastic piece is arranged at the gap; and the equipment box is arranged on the mounting seat, and filtering equipment is mounted in the equipment box. The first elastic piece can buffer up-down vibration generated by bumping of a vehicle, the second elastic piece can cope with vibration in the horizontal direction, filtering equipment is protected, faults caused by vibration are reduced, and the service life of the filtering equipment is prolonged. In the aspect of heat dissipation, the design of the equipment box is beneficial to heat dissipation, so that the filtering equipment works in a stable temperature environment, and the filtering performance is maintained. The problem of poor damping effect caused by limited damping direction in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle-mounted equipment technology, specifically to a filtering device. Background Technology

[0002] With the continuous development of the automotive industry and people's increasing demands for driving experience, the sound quality of car audio systems has received more and more attention. Car audio filtering devices process electronic signals to weaken or eliminate signals within a specified frequency range, thereby effectively reducing the impact of power supply noise, electromagnetic interference, and environmental noise on audio signals.

[0003] During driving, cars vibrate due to uneven road surfaces and engine operation. These vibrations can easily cause slight displacements or loosening of components within the filter device, thus affecting the stability and accuracy of the filter circuit. Patent No. 201720873580.4 discloses an audio filter with strong anti-interference capabilities. By installing the filter inside a housing with independently configured horizontal and vertical vibration damping mechanisms, it effectively buffers the effects of car shaking.

[0004] Existing technologies primarily rely on sliders moving up and down within a groove to buffer lateral swaying, and springs and rod sleeves to buffer vertical vibrations. However, this approach may be ineffective at buffering vibrations from other directions. During vehicle operation, complex vibrations from multiple directions may occur, and this structure may not be able to comprehensively and effectively protect the filter body from these vibrations, thus affecting its lifespan and filtering performance. Utility Model Content

[0005] In view of this, the present invention provides a filtering device to solve the problem of poor shock absorption effect caused by the limited shock absorption direction of the prior art.

[0006] This utility model provides a filtering device, comprising: a base having a first mounting groove; a first elastic member disposed at the bottom of the first mounting groove; a mounting seat disposed on the first elastic member, wherein there is a gap between the periphery of the mounting seat and the inner sidewall of the first mounting groove, and a second elastic member is disposed at the gap; and a device box disposed on the mounting seat, wherein a filtering device is installed inside the device box.

[0007] With the above configuration, when the filter device is subjected to external vibration, the base, as the overall supporting foundation, can first transmit the vibration to the first elastic element. The first elastic element, located at the bottom of the first mounting groove, effectively buffers the vibration energy from below, reducing the impact of vibration directly transmitted upwards on the mounting base and the filter equipment inside the equipment box. When the device is subjected to vibration from the horizontal direction or other non-vertical directions, the second elastic element can utilize its own elastic properties to buffer and absorb the swaying generated by the mounting base, preventing excessive displacement or collision of the mounting base within the first mounting groove. This avoids problems such as loosening of internal components or poor connections in the filter equipment due to horizontal vibration, ensuring the integrity and stability of the internal circuitry and components of the filter equipment. This effectively improves the overall vibration resistance of the filter device, enabling it to work reliably and output a stable filtering effect even in complex vibration environments.

[0008] Optionally, the first elastic element has a plurality of elements spaced apart at the bottom of the first mounting groove.

[0009] With the above configuration, multiple spaced-apart first elastic elements can evenly disperse vibrations from the base. Compared to a single elastic element, the combined action of multiple elastic elements at different locations avoids localized stress concentration. This allows the base to effectively buffer and disperse vibrations when subjected to various complex vibrations, further enhancing the vertical seismic stability of the filtering device.

[0010] Optionally, the first elastic element includes an upper end plate and a lower end plate, the upper end plate abutting against the equipment box, the lower end plate abutting against the bottom of the first mounting groove, and the upper end plate and the lower end plate being connected by a plurality of first damping columns.

[0011] With the above configuration, the upper end plate abuts against the equipment box, and the lower end plate abuts against the bottom of the first mounting groove, forming a stable connection structure. The first damping column provides elastic support, buffering vibrations in the vertical direction and effectively suppressing the continuous impact of vibrations.

[0012] Optionally, a plurality of first damping columns enclose an installation space, and a first spring is provided in the installation space. The top end of the first spring abuts against the upper end plate, and the bottom end of the first spring abuts against the lower end plate. The first spring has an elastic force that drives the upper end plate and the lower end plate away from each other.

[0013] Through the above configuration, the first spring effectively absorbs and disperses vertical vibration energy during compression and rebound, enhancing the overall buffering capacity of the first elastic element and providing more stable support for the equipment box. In conjunction with the first damping column, the first spring can better adjust and balance the force on the device under different vibration conditions, ensuring the relative positional stability between the upper and lower end plates and reducing displacement and swaying of the filtering equipment caused by vertical vibration.

[0014] Optionally, at least two of the second elastic elements are symmetrically arranged on each side of the mounting base.

[0015] With the above arrangement, at least two second elastic elements are symmetrically distributed on each side of the mounting base, providing elastic support and cushioning for the mounting base from multiple directions. When the filter device is subjected to vibrations from the horizontal direction or other non-vertical directions, the multiple symmetrically arranged second elastic elements can evenly disperse and absorb the impact force from each direction, ensuring that the mounting base maintains a relatively stable position within the first mounting groove, preventing it from tilting or excessively displacing due to uneven force distribution, thus giving the filter device good seismic performance in all horizontal directions.

[0016] Optionally, the four corners of the mounting base are respectively provided with corner protectors spaced apart from the mounting base. The corner protectors abut against the inner sidewall of the first mounting groove, and the second elastic member is connected between the mounting base and the corner protectors.

[0017] With the above configuration, the corner plates at the four corners of the mounting base abut against the inner wall of the first mounting groove, providing additional positioning and support points for the entire device in the horizontal direction. When the filter device is subjected to vibration, the corner plates can limit excessive horizontal movement of the mounting base, enhancing the overall stability of the device. The second elastic element connects the mounting base and the corner plates, further optimizing the horizontal buffering performance.

[0018] Optionally, the second elastic element includes a second damping post, one end of which is connected to the mounting base, and the other end of which is connected to the corner plate.

[0019] With the above configuration, when the filter device is subjected to horizontal vibration, the second damping column can effectively transmit and disperse the vibration energy, allowing relative movement between the mounting base and the corner plate within a certain range. This buffers the direct impact of vibration on the mounting base, reducing the horizontal displacement and swaying of the mounting base. This helps maintain the stability of the mounting base within the first mounting slot, thereby ensuring that the filter equipment inside the equipment box is not affected by horizontal vibration, or is minimally affected, and maintains its normal operation.

[0020] Optionally, a second spring is fitted on the second damping column, one end of the second spring is connected to the mounting base, and the other end of the second spring is connected to the corner plate. The second spring has an elastic force that drives the corner plate away from the mounting base.

[0021] With the above configuration, when the filter device is subjected to horizontal vibration, the second spring can rapidly extend and retract using its elastic force to absorb and store vibration energy, thus mitigating the displacement of the mounting seat. Working in conjunction with the second damping column, the damping column limits excessive spring deformation, and the spring prompts the damping column to better dissipate energy. Together, they maintain relative stability of the mounting seat in the horizontal direction, ensuring that the filter equipment is not disturbed by excessive horizontal vibration.

[0022] Optionally, the mounting base has a second mounting slot for embedding into the device housing.

[0023] With the above configuration, the second mounting slot provides a precise installation position for the equipment box. The equipment box is more securely mounted on the mounting base, effectively preventing displacement due to vibration during vehicle operation and ensuring the relatively fixed position of the filtering equipment inside the box.

[0024] Optionally, the filtering device includes a functional module and a heat dissipation module. The functional module is fixedly installed inside the device housing, and the heat dissipation module has at least a portion disposed outside the device housing. The heat dissipation module includes a heat pipe, a first heat sink, and a second heat sink. The first heat sink is connected to the functional module, and the second heat sink is disposed outside the device housing. The heat pipe connects the first heat sink and the second heat sink. The heat dissipation module also includes a fan device disposed on the device housing. The inlet of the fan device is disposed inside the device housing, and the outlet of the fan device is disposed outside the device housing. The outlet of the fan device faces the second heat sink.

[0025] With the above setup, the heat generated by the functional module is absorbed by the first heat sink and quickly transferred to the second heat sink outside the enclosure via heat pipes. A fan draws hot air from inside the enclosure and blows it onto the second heat sink, accelerating airflow and carrying away heat, forming a highly efficient heat dissipation cycle. This effectively reduces temperature, avoids problems such as component performance degradation, maintains stable filtering performance of the functional module, extends device lifespan, improves reliability and stability, and ensures filtering effectiveness. Attached Figure Description

[0026] 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.

[0027] Figure 1 This is a cross-sectional view of a specific embodiment of the filtering device provided in this utility model.

[0028] Figure 2 This is an exploded view of a specific embodiment of the filtering device provided in this utility model.

[0029] Figure 3 for Figure 2 A magnified view of part A in the image;

[0030] Figure 4 This is a top view of a specific embodiment of the filtering device provided in this utility model.

[0031] Figure 5 This is a side view of a specific embodiment of the filtering device provided in this utility model.

[0032] Figure 6 for Figure 2 A magnified view of part B in the image.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Base; 2. First mounting slot; 3. Mounting base; 4. Equipment box; 5. Upper end plate; 6. Lower end plate; 7. First damping column; 8. First spring; 9. Corner plate; 10. Second damping column; 11. Second spring; 12. Second mounting slot; 13. Functional module; 14. Heat pipe; 15. First heat sink; 16. Second heat sink; 17. Fan assembly. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments 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.

[0036] The following is combined with Figures 1 to 6 The following describes embodiments of the present invention.

[0037] like Figure 1 As shown, this is a specific implementation of the filtering device provided in this embodiment, including: a base 1, a first elastic element, a mounting base 3, and a device box 4.

[0038] Specifically, the base 1 has a first mounting groove 2, which is a rectangular groove; a first elastic element is disposed at the bottom of the first mounting groove 2; a mounting seat 3 is disposed on the first elastic element and supports the mounting seat 3; there is a gap between the periphery of the mounting seat 3 and the inner sidewall of the first mounting groove 2, and a second elastic element is disposed at the gap; an equipment box 4 is disposed on the mounting seat 3, and a filtering device is installed inside the equipment box 4.

[0039] In this embodiment, the rectangular groove-shaped first mounting slot 2 provides the foundation for the installation of the entire filter device. The first elastic element at the bottom of the first mounting slot 2, in cooperation with the mounting base 3, effectively buffers the impact of vibrations from the base 1. The spacing between the mounting base 3 and the inner wall of the first mounting slot 2, along with the second elastic element therein, further enhances the device's horizontal shock resistance. When external vibrations occur, both vertical and horizontal vibration energy can be effectively dispersed and buffered through these structures, keeping the filter device inside the equipment box 4 as stable as possible. This helps reduce malfunctions of the filter device due to vibration, improves its operational stability, ensures the reliability of the filtering effect, and enables the filter device to adapt to complex environments such as those with vehicle traffic.

[0040] like Figure 2 As shown, this is a specific implementation of the filtering device provided in this embodiment. The first elastic member has a plurality of members spaced apart at the bottom of the first mounting groove 2.

[0041] Specifically, four first elastic elements are arranged in an array between the first mounting groove 2 and the base 1. When subjected to vertical vibration and impact, each first elastic element acts as an independent damping unit, effectively preventing elastic limit problems caused by excessive force at a single point and avoiding a decrease in overall damping effect due to local elastic failure. Moreover, the four spaced-apart first elastic elements can better adapt to possible local unevenness or uneven force on the base 1, ensuring that the force transmitted from the base 1 to the mounting base 3 is uniform and stable, reducing the risk of tilting or shaking of the mounting base 3.

[0042] In other embodiments, if the area of ​​the device requiring vibration reduction is large, the number of the first elastic elements can be adjusted according to actual needs.

[0043] like Figure 3As shown, this is a specific implementation of the filtering device provided in this embodiment. The first elastic member includes an upper end plate 5 and a lower end plate 6 spaced apart. The upper end plate 5 abuts against the equipment box 4, and the lower end plate 6 abuts against the bottom of the first mounting groove 2. The upper end plate 5 and the lower end plate 6 are connected by a plurality of first damping columns 7.

[0044] Specifically, the upper end plate 5 abuts against the equipment box 4, and the lower end plate 6 abuts against the bottom of the mounting groove. The upper end plate 5 and the lower end plate 6 are connected by four damping columns located at the four corners. During vibration, the force on the equipment box 4 is transmitted to the upper end plate 5 and then through the first damping column 7 to the lower end plate 6. The first damping column 7 can extend and retract to buffer vibration and can also convert some mechanical energy into heat energy for energy dissipation, suppressing the continuation and amplification of vibration. This protects the filtering equipment, enabling it to work stably in complex vibration environments, reducing component damage and filtering accuracy degradation, improving the reliability and lifespan of the device, and enhancing its adaptability to vibrations of different intensities.

[0045] like Figure 3 As shown, this is a specific implementation of the filtering device provided in this embodiment. A plurality of first damping columns 7 enclose an installation space. A first spring 8 is provided in the installation space. The top end of the first spring 8 abuts against the upper end plate 5, and the bottom end of the first spring 8 abuts against the lower end plate 6. The first spring 8 has an elastic force that drives the upper end plate 5 and the lower end plate 6 away from each other.

[0046] Specifically, the first spring 8 is placed in the space enclosed by the first damping column 7, with its upper and lower ends abutting against the upper end plate 5 and the lower end plate 6, respectively. During vibration, the first spring 8 uses its elastic force to buffer the energy from the direction of the equipment box 4, reducing vibration and protecting the filtering equipment. It works in conjunction with the first damping column 7; the former buffers energy, while the latter limits the former's excessive deformation. Together, they optimize the vibration reduction effect, ensuring the stable operation of the filtering equipment in complex vibration environments, maintaining performance, and reducing malfunctions.

[0047] like Figure 2 As shown, this is a specific implementation of the filtering device provided in this embodiment, wherein at least two of the second elastic members are symmetrically arranged on each side of the mounting base 3.

[0048] Specifically, the mounting base 3 has two second elastic elements symmetrically arranged on its width side and four second elastic elements symmetrically arranged on its length side. This allows the mounting base 3 to uniformly buffer when subjected to horizontal external forces, and the elastic elements on each side to work together when subjected to vibrations in different directions. Multiple elastic elements increase buffer redundancy, which can cope with malfunctions or uneven force distribution. It also reduces the twisting or tilting of the mounting base 3, maintains the stability of the filtering equipment, preserves the filtering effect, and improves the reliability and lifespan of the device.

[0049] like Figure 2As shown, this is a specific implementation of the filtering device provided in this embodiment. The four corners of the mounting base 3 are respectively provided with corner plates 9 spaced apart from the mounting base 3. The corner plates 9 abut against the inner sidewall of the first mounting groove 2. The second elastic member is connected between the mounting base 3 and the corner plates 9.

[0050] Specifically, the corner plates 9 at the four corners of the mounting base 3 are spaced apart from the mounting base 3 and abut against the inner sidewall of the first mounting groove 2. In the horizontal direction, the corner plates 9 can limit excessive movement of the mounting base 3. The second elastic element connecting the mounting base 3 and the corner plates 9 can buffer and absorb horizontal vibration energy, reduce the impact on the filtering equipment, ensure its stable operation in complex vibration environments, and improve the reliability and lifespan of the filtering device.

[0051] like Figure 4 As shown, this is a specific implementation of the filtering device provided in this embodiment. The second elastic element includes a second damping column 10. One end of the second damping column 10 is connected to the mounting base 3, and the other end of the second damping column 10 is connected to the corner plate 9.

[0052] Specifically, the second damping column 10, as part of the second elastic element, connects the mounting base 3 and the corner plate 9. During horizontal vibration, the shaking of the mounting base 3 causes the second damping column 10 to deform, buffering the vibration energy and reducing the shaking of the mounting base 3. At the same time, its damping characteristics can convert some of the vibration energy into heat energy for consumption, suppressing the continuation and amplification of vibration, and ensuring the normal operation, stable performance, and lifespan of the filtering equipment.

[0053] like Figure 1 As shown, this is a specific implementation of the filtering device provided in this embodiment. A second spring 11 is sleeved on the second damping column 10. One end of the second spring 11 is connected to the mounting base 3, and the other end of the second spring 11 is connected to the corner plate 9. The second spring 11 has an elastic force that drives the corner plate 9 away from the mounting base 3.

[0054] Specifically, the second damping column 10 is fitted with a second spring 11, connecting the mounting base 3 and the corner plate 9. During horizontal vibration, the second spring 11 extends and retracts to absorb and store energy, reducing the swaying of the mounting base 3. The second spring 11 works in conjunction with the second damping column 10; the second damping column 10 prevents excessive deformation of the spring, while the second spring 11 causes the damping column to dissipate energy, maintaining the stability of the device, ensuring the performance of the filtering equipment, and extending its service life.

[0055] like Figure 2 As shown, this is a specific implementation of the filtering device provided in this embodiment. The mounting base 3 has a second mounting slot 12 for embedding into the device box 4.

[0056] Specifically, the second mounting slot 12 of the mounting base 3 is used to embed the equipment box 4. This facilitates the installation of the filter equipment and improves efficiency; it can limit the displacement of the equipment box 4 when the filter device is subjected to vibration, ensuring its stable operation; it can also reduce the contact of dust, water vapor, etc. with the equipment box 4, reduce the risk of failure, and extend its service life.

[0057] like Figure 2 , Figure 4 As shown, this is a specific implementation of the filtering device provided in this embodiment. The filtering device includes a functional module 13 and a heat dissipation module. The functional module 13 is fixedly installed inside the device housing 4, and the heat dissipation module has at least a portion disposed outside the device housing 4. The heat dissipation module includes a heat pipe 14, a first heat sink 15, and a second heat sink 16. The first heat sink 15 is connected to the functional module 13, and the second heat sink 16 is disposed outside the device housing 4. The heat pipe 14 is connected between the first heat sink 15 and the second heat sink 16. The heat dissipation module also includes a fan device 17, which is disposed on the device housing 4. The inlet of the fan device 17 is disposed inside the device housing 4, and the outlet of the fan device 17 is disposed outside the device housing 4. The outlet of the fan device 17 faces the second heat sink 16.

[0058] Specifically, the functional module 13 of the filtering equipment is located inside the equipment housing 4, while the heat dissipation module is located outside the housing. In the heat dissipation module, the first heat sink 15 is a heat dissipation fin mounted on the functional module 13, which increases contact with air and improves heat dissipation efficiency. The second heat sink 16 is a heat dissipation assembly consisting of several heat sinks fixed together by fastening bolts, with two sets located on both sides of the equipment housing 4. Heat pipes 14 connect the two sets of second heat sinks 16 and pass above the first heat sinks 15, transferring heat from inside the housing to outside. The fan device 17 is located on the equipment housing 4, with an air inlet on the side wall of the housing and an air outlet outside the housing facing the second heat sinks 16, accelerating airflow, enhancing heat dissipation, and ensuring stable operation of the filtering equipment.

[0059] Working principle:

[0060] When the filter device is working, a first elastic element is provided at the bottom of the first mounting groove 2 of the base 1, and the mounting seat 3 is placed on the first elastic element. The mounting seat 3 is spaced from the inner wall of the first mounting groove 2, and a second elastic element is provided at the spaced intervals. The first elastic element can be composed of multiple spaced parts, including an upper end plate 5 that abuts against the equipment box 4 and a lower end plate 6 that abuts against the bottom of the first mounting groove 2. Multiple first damping columns 7 connect the two, and a first spring 8 is located within the mounting space enclosed by the first damping columns 7, which can buffer vertical vibrations of the equipment box 4. At least two second elastic elements are symmetrically arranged on each side of the mounting seat 3. The four corners of the mounting seat 3 have corner plates 9 that are spaced from the mounting seat 3 and abut against the inner wall of the first mounting groove 2. The second elastic element connects the two, including a second damping column 10 and a second spring 11 fitted on it, which can buffer horizontal vibrations. The equipment box 4 is installed via the second mounting slot 12 on the mounting base 3. The box contains a filtering device, whose functional module 13 is fixed inside the box, while the heat dissipation module is outside the box. The heat pipe 14 connects the first heat sink 15 connected to the functional module 13 and the second heat sink 16 outside the box. The fan device 17 on the equipment box 4 has its inlet inside the box and its outlet outside the box, facing the second heat sink 16. This accelerates airflow to remove heat, ensuring stable operation of the filtering device, extending the service life of the device, and ensuring that every audio output reaches a high quality level.

[0061] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations fall within the scope of the present invention.

Claims

1. A filtering device, characterized in that, include: The base (1) has a first mounting groove (2); The first elastic element is disposed at the bottom of the first mounting groove (2); Mounting base (3) is disposed on the first elastic member. There is a gap between the periphery of the mounting base (3) and the inner sidewall of the first mounting groove (2). A second elastic member is disposed at the gap. The equipment box (4) is mounted on the mounting base (3), and the equipment box (4) contains a filter device.

2. The filtering device according to claim 1, characterized in that, The first elastic element has a plurality of elements spaced apart at the bottom of the first mounting groove (2).

3. The filtering device according to claim 2, characterized in that, The first elastic element includes an upper end plate (5) and a lower end plate (6) spaced apart. The upper end plate (5) abuts against the equipment box (4), and the lower end plate (6) abuts against the bottom of the first mounting groove (2). The upper end plate (5) and the lower end plate (6) are connected by a plurality of first damping columns (7).

4. The filtering device according to claim 3, characterized in that, Multiple first damping columns (7) enclose an installation space, and a first spring (8) is provided in the installation space. The top end of the first spring (8) abuts against the upper end plate (5), and the bottom end of the first spring (8) abuts against the lower end plate (6). The first spring (8) has an elastic force that drives the upper end plate (5) and the lower end plate (6) away from each other.

5. The filtering device according to claim 1, characterized in that, The second elastic element has at least two symmetrically arranged on each side of the mounting base (3).

6. The filtering device according to claim 5, characterized in that, The four corners of the mounting base (3) are respectively provided with corner plates (9) spaced apart from the mounting base (3). The corner plates (9) abut against the inner sidewall of the first mounting groove (2). The second elastic element is connected between the mounting base (3) and the corner plates (9).

7. The filtering device according to claim 6, characterized in that, The second elastic element includes a second damping post (10), one end of which is connected to the mounting base (3), and the other end of which is connected to the corner plate (9).

8. The filtering device according to claim 7, characterized in that, A second spring (11) is fitted on the second damping column (10). One end of the second spring (11) is connected to the mounting base (3), and the other end of the second spring (11) is connected to the corner plate (9). The second spring (11) has an elastic force that drives the corner plate (9) away from the mounting base (3).

9. The filtering device according to any one of claims 1-8, characterized in that, The mounting base (3) has a second mounting slot (12) for embedding the device housing (4).

10. The filtering device according to any one of claims 1-8, characterized in that, The filtering device includes a functional module (13) and a heat dissipation module. The functional module (13) is fixedly installed inside the device box (4), and the heat dissipation module has at least a portion disposed outside the device box (4). The heat dissipation module includes a heat pipe (14), a first heat sink (15) and a second heat sink (16). The first heat sink (15) is connected to the functional module (13), and the second heat sink (16) is disposed outside the equipment box (4). The heat pipe (14) is connected between the first heat sink (15) and the second heat sink (16). The heat dissipation module also includes a fan device (17), which is disposed on the equipment box (4). The inlet of the fan device (17) is disposed inside the equipment box (4), and the outlet of the fan device (17) is disposed outside the equipment box (4). The outlet of the fan device (17) faces the second heat sink (16).

Images