Noise reduction device for EMC (Electro Magnetic Compatibility) detection equipment

Abstract

The utility model relates to the technical field of EMC detection, and discloses a noise reduction device for EMC detection equipment, which comprises a noise reduction box body, a frame is fixedly mounted at the top end of the noise reduction box body, a filter plate is fixedly mounted at the top end of the frame, a support plate is fixedly mounted in the frame, a cooling fan is fixedly mounted at the bottom end of the support plate, and a ventilation pipe is fixedly mounted at the bottom end of the frame. An exhaust chamber is fixedly installed at the bottom end of the ventilation pipe, exhaust holes are formed in the bottom end of the exhaust chamber, a partition plate is fixedly installed on the side edge of the exhaust chamber, an air guide pipe is further fixedly installed on the side edge of the exhaust chamber, and a side plate is fixedly installed at the bottom end of the exhaust chamber. According to the device, the noise reduction effect is achieved, meanwhile, external filtered air is driven by the cooling fan to enter the frame, then part of cold air is exhausted from the top end of the noise reduction box body through the ventilation pipe, the exhaust chamber and the exhaust holes, meanwhile, the other part of cold air is transmitted to the side edge of the noise reduction box body through the air guide pipe and the ventilation holes, and the comprehensive cooling effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of EMC testing technology, specifically a noise reduction device for EMC testing equipment. Background Technology

[0002] Electromagnetic compatibility (EMC) testing assesses the ability of electronic equipment to operate normally in an electromagnetic environment without causing unacceptable electromagnetic interference to other electronic devices in the environment. Existing EMC testing equipment typically requires placing the test subject inside a noise-reducing enclosure before testing. This enclosed state during testing prevents heat dissipation, easily leading to overheating of the test subject and affecting its usability. While some existing testing equipment incorporates internal heat dissipation structures, these typically only dissipate heat from one side, resulting in ineffective cooling and failing to achieve the desired cooling effect. Therefore, improvements to existing devices are needed to meet practical requirements. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides a noise reduction device for EMC testing equipment. It achieves noise reduction while simultaneously drawing filtered air into the frame via a cooling fan. The cooled air is then transported to the exhaust chamber through a ventilation duct. The exhaust vent discharges some of the cooled air from the top of the noise reduction chamber, while some of the cooled air is transferred to the sides of the noise reduction chamber through the air guide duct and ventilation vent, thus achieving comprehensive cooling and solving the aforementioned technical problems.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model provides the following technical solution: a noise reduction device for EMC testing equipment, comprising a noise reduction housing, a frame fixedly installed at the top of the noise reduction housing, a filter plate fixedly installed at the top of the frame, and a support plate fixedly installed inside the frame, a cooling fan fixedly installed at the bottom of the support plate, a ventilation pipe fixedly installed at the bottom of the frame, an exhaust chamber fixedly installed at the bottom of the ventilation pipe, an exhaust hole opened at the bottom of the exhaust chamber, a partition fixedly installed on the side, a guide pipe fixedly installed on the side of the exhaust chamber, and a side plate fixedly installed at the bottom, a ventilation hole opened on the inner side of the side plate, and a fixing device fixedly installed at the bottom of the interior of the noise reduction housing.

[0007] Preferably, a set of filter plates is fixedly installed at the top of the frame, and a set of support plates is fixedly installed inside the frame, with a set of cooling fans fixedly installed at the bottom of the support plates.

[0008] The above technical solution firstly supports the cooling fan through the frame and support plate, which increases the stability of the cooling fan installation. After the cooling fan is started, it rotates and drives the outside natural air, which has been filtered by the filter plate, into the frame. The filter plate filters the natural air to prevent external impurities from entering the noise reduction chamber and causing dust accumulation inside the noise reduction chamber.

[0009] Preferably, a set of ventilation pipes is fixedly installed at the bottom of the frame, and a set of exhaust chambers is fixedly installed at the bottom of the ventilation pipes. Multiple sets of exhaust holes are opened at the bottom of the exhaust chambers.

[0010] With the above technical solution, after the cooling fan is started, it draws outside air into the frame, then through the frame to the ventilation duct, then through the ventilation duct to the exhaust chamber, and finally through the exhaust hole into the noise reduction box, thus achieving a uniform cooling effect.

[0011] Preferably, a set of partitions is fixedly installed on both sides and the back of the exhaust chamber, a set of air guide pipes is fixedly installed on both sides and the back of the exhaust chamber, and a set of side plates is fixedly installed at the bottom of both sides and the back of the exhaust chamber. Each set of side plates has multiple sets of ventilation holes on its inner side.

[0012] The above technical solution increases the stability of the exhaust chamber installation by using partitions. At the same time, the three sets of partitions and the side plates form a three-sided air guide chamber. When cold air from the outside enters the exhaust chamber, some of it is transferred to the air guide chamber through the air guide pipes, and then enters the noise reduction box from the side through the ventilation holes, achieving the effect of dispersed heat reduction and making the heat dissipation effect inside the noise reduction box better.

[0013] Preferably, the fixing device includes a fixing plate, a vertical plate is fixedly installed on the top of the fixing plate, a fixing cylinder is fixedly installed on the side of the vertical plate, a screw is threaded through the inside of the fixing cylinder, and a clamping plate is fixedly installed on the top of the screw.

[0014] By using the above technical solution, the test object is placed on the top of the fixed plate, and the screw is rotated so that the screw drives the clamping plate to move forward inside the fixed cylinder until the clamping plate clamps and fixes the test object, which increases the stability of the test object detection process.

[0015] Preferably, the noise reduction enclosure includes a protective outer layer, a first sound insulation board is fixedly installed inside the protective outer layer, a second sound insulation board is fixedly installed inside the first sound insulation board, and sound-absorbing cotton is fixedly installed inside the second sound insulation board.

[0016] The above technical solution first absorbs the sound-absorbing cotton inside the noise-reducing enclosure, and then isolates the sound through the first and second sound insulation boards, thereby achieving the noise reduction effect of the noise-reducing enclosure.

[0017] Compared with the prior art, this utility model provides a noise reduction device for EMC testing equipment, which has the following beneficial effects:

[0018] 1. This utility model first supports the cooling fan through a frame and support plate, increasing the stability of the cooling fan installation. After the cooling fan is started, it rotates, drawing in outside air filtered by the filter plate into the frame. The filter plate filters the outside air, preventing external impurities from entering the noise reduction chamber and causing dust accumulation inside. After the cooling fan starts, it draws outside air into the frame, then through the frame to the ventilation duct, and then through the ventilation duct to the exhaust chamber. Finally, it enters the noise reduction chamber through the exhaust hole. The partition increases the stability of the exhaust chamber installation. At the same time, the three sets of partitions and the side plates form a three-sided air guide chamber. When outside cold air enters the exhaust chamber, some of it is transferred to the air guide chamber through the air guide duct, and then enters the noise reduction chamber from the side through the ventilation hole, achieving a distributed cooling effect and improving the heat dissipation effect inside the noise reduction chamber.

[0019] 2. This utility model increases the stability of the detection process by placing the detection body on the top of the fixed plate and rotating the screw, which causes the screw to drive the clamping plate to move forward inside the fixed cylinder until the clamping plate clamps and fixes the detection body.

[0020] 3. This utility model absorbs the volume inside the noise reduction box by using sound-absorbing cotton and isolates the volume by using the first sound insulation board and the second sound insulation board, thereby achieving the noise reduction effect of the noise reduction box. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the noise reduction device of this utility model;

[0022] Figure 2 This is a schematic diagram of the internal three-dimensional structure of the noise reduction device of this utility model;

[0023] Figure 3 This is an isometric side view of the internal structure of the noise reduction device of this utility model;

[0024] Figure 4 This is a front view of the internal structure of the noise reduction device of this utility model;

[0025] Figure 5 This is a partial disassembly diagram of the noise reduction device of this utility model;

[0026] Figure 6 This utility model relates to a structural noise reduction device. Figure 4 Enlarged diagram of A in the middle;

[0027] Figure 7This is an enlarged three-dimensional structural diagram of the fixing device in the structural noise reduction device of this utility model;

[0028] Figure 8 This is a schematic diagram of the internal structure of the noise reduction box in the noise reduction device of this utility model.

[0029] The components include: 1. Noise-reducing enclosure; 101. Protective outer layer; 102. First sound insulation board; 103. Second sound insulation board; 104. Sound-absorbing cotton; 2. Frame; 3. Filter board; 4. Support plate; 5. Cooling fan; 6. Ventilation duct; 7. Exhaust chamber; 8. Exhaust hole; 9. Partition; 10. Air duct; 11. Side plate; 12. Ventilation hole; 13. Fixing device; 131. Fixing plate; 132. Vertical plate; 133. Fixing cylinder; 134. Screw; 135. Clamping plate. Detailed Implementation

[0030] 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.

[0031] Please see Figure 1-8 A noise reduction device for EMC testing equipment includes a noise reduction housing 1, a frame 2 fixedly installed at the top of the noise reduction housing 1, a filter plate 3 fixedly installed at the top of the frame 2, and a support plate 4 fixedly installed inside the frame 2. A cooling fan 5 is fixedly installed at the bottom of the support plate 4. A ventilation pipe 6 is fixedly installed at the bottom of the frame 2. An exhaust chamber 7 is fixedly installed at the bottom of the ventilation pipe 6. An exhaust hole 8 is opened at the bottom of the exhaust chamber 7, and a partition 9 is fixedly installed on the side. A duct 10 is also fixedly installed on the side of the exhaust chamber 7, and a side plate 11 is fixedly installed at the bottom. A ventilation hole 12 is opened on the inner side of the side plate 11. A fixing device 13 is fixedly installed at the bottom inside the noise reduction housing 1.

[0032] Specifically, a set of filter plates 3 are fixedly installed at the top of frame 2, and a set of support plates 4 are fixedly installed inside. A set of cooling fans 5 are fixedly installed at the bottom of support plates 4. The advantage is that, firstly, the cooling fans 5 are supported by frame 2 and support plates 4, which increases the stability of the installation of cooling fans 5. After the cooling fans 5 are started, they rotate, driving the outside natural air filtered by filter plates 3 into the interior of frame 2. The filter plates 3 filter the natural air, preventing external impurities from entering the noise reduction chamber 1 and causing dust accumulation inside the noise reduction chamber 1.

[0033] Specifically, a set of ventilation pipes 6 are fixedly installed at the bottom of the frame 2, and a set of exhaust chambers 7 are fixedly installed at the bottom of the ventilation pipes 6. Multiple exhaust holes 8 are opened at the bottom of the exhaust chambers 7. The advantage is that after the cooling fan 5 is started, it draws outside air into the frame 2, then through the frame 2 to the ventilation pipes 6, then through the ventilation pipes 6 to the exhaust chambers 7, and finally through the exhaust holes 8 into the noise reduction box 1, achieving a uniform cooling effect.

[0034] Specifically, a set of partitions 9 are fixedly installed on both sides and the back of the exhaust chamber 7, a set of air ducts 10 are fixedly installed on both sides and the back of the exhaust chamber 7, and a set of side plates 11 are fixedly installed at the bottom of both sides and the back of the exhaust chamber 7. Each set of side plates 11 has multiple sets of ventilation holes 12 on its inner side. The advantage is that the partitions 9 increase the stability of the exhaust chamber 7 installation. At the same time, the three sets of partitions 9 and the side plates 11 form a three-sided air duct chamber. When cold air from the outside enters the exhaust chamber 7, part of it is transferred to the air duct chamber through the air ducts 10, and then enters the noise reduction box 1 from the side through the ventilation holes 12, achieving a distributed heat reduction effect and making the heat dissipation effect inside the noise reduction box 1 better.

[0035] Specifically, the fixing device 13 includes a fixing plate 131, a vertical plate 132 fixedly mounted on the top of the fixing plate 131, a fixing cylinder 133 fixedly mounted on the side of the vertical plate 132, a screw 134 threaded through the inside of the fixing cylinder 133, and a clamping plate 135 fixedly mounted on the top of the screw 134. The advantage is that by placing the test object on the top of the fixing plate 131 and rotating the screw 134, the screw 134 drives the clamping plate 135 to move forward within the threaded part of the fixing cylinder 133 until the clamping plate 135 clamps and fixes the test object, increasing the stability of the test object detection process.

[0036] Specifically, the noise-reducing enclosure 1 includes a protective outer layer 101, inside which a first sound insulation panel 102 is fixedly installed, inside which a second sound insulation panel 103 is fixedly installed, and inside which a sound-absorbing cotton 104 is fixedly installed. The advantage is that the sound-absorbing cotton 104 absorbs the sound inside the noise-reducing enclosure 1, and the sound is isolated by the first and second sound insulation panels 102 and 103, thus achieving the noise reduction effect of the noise-reducing enclosure 1.

[0037] In use, the cooling fan 5 is first supported by the frame 2 and support plate 4, increasing the stability of the cooling fan 5 installation. After the cooling fan 5 is started, it rotates, drawing in outside air filtered by the filter plate 3 into the frame 2. The filter plate 3 filters the outside air, preventing external impurities from entering the noise reduction chamber 1 and causing dust accumulation inside. After the cooling fan 5 starts, it draws outside air into the frame 2, then through the frame 2 to the ventilation pipe 6, and through the ventilation pipe 6 to the exhaust chamber 7. Finally, it enters the noise reduction chamber 1 through the exhaust hole 8. The partition 9 increases the stability of the exhaust chamber 7 installation. At the same time, the three partitions 9 and the side plate 11 form a... The three-sided air duct allows some of the cold air from the outside to be transferred into the air duct 10 after entering the exhaust chamber 7. Then, it enters the noise reduction box 1 from the side through the ventilation holes 12, achieving a dispersed heat reduction effect and improving the heat dissipation effect inside the noise reduction box 1. The test object is placed on the top of the fixed plate 131, and the screw 134 is rotated, causing the screw 134 to drive the clamping plate 135 to move forward in the thread inside the fixed cylinder 133 until the clamping plate 135 clamps and fixes the test object, increasing the stability of the test object detection process. The sound-absorbing cotton 104 absorbs the volume inside the noise reduction box 1, and the volume is isolated by the first sound insulation plate 102 and the second sound insulation plate 103, thereby achieving the noise reduction effect of the noise reduction box 1.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A noise reduction device for EMC testing equipment, comprising a noise reduction box (1), characterized in that: The noise reduction box (1) has a frame (2) fixedly mounted on the top, a filter plate (3) fixedly mounted on the top, and a support plate (4) fixedly mounted inside, a cooling fan (5) fixedly mounted on the bottom of the support plate (4), a ventilation pipe (6) fixedly mounted on the bottom of the frame (2), an exhaust chamber (7) fixedly mounted on the bottom of the ventilation pipe (6), an exhaust hole (8) opened at the bottom of the exhaust chamber (7), and a partition plate (9) fixedly mounted on the side, an air guide pipe (10) fixedly mounted on the side of the exhaust chamber (7), and a side plate (11) fixedly mounted on the bottom, a ventilation hole (12) opened on the inner side of the side plate (11), and a fixing device (13) fixedly mounted on the bottom of the noise reduction box (1).

2. A noise reduction device for EMC testing equipment according to claim 1, characterized in that: A group of filter plates (3) are fixedly mounted on the top of the frame (2), and a group of support plates (4) are fixedly mounted inside the frame; a group of cooling fans (5) are fixedly mounted on the bottom of the support plates (4).

3. The noise reduction device for EMC testing equipment according to claim 1, characterized in that: A group of ventilation pipes (6) are fixedly mounted on the bottom end of the frame (2), a group of exhaust chambers (7) are fixedly mounted on the bottom end of the ventilation pipes (6), and a plurality of exhaust holes (8) are provided at the bottom end of the exhaust chambers (7).

4. The noise reduction device for EMC testing equipment according to claim 1, characterized in that: A group of partitions (9) are fixedly mounted on both sides and the back of the exhaust chamber (7), a group of air guide pipes (10) are fixedly mounted on both sides and the back of the exhaust chamber (7), a group of side panels (11) are fixedly mounted at the bottom of both sides and the back of the exhaust chamber (7), and a plurality of ventilation holes (12) are provided on the inner side of each group of side panels (11).

5. The noise reduction device for EMC testing equipment according to claim 1, characterized in that: The fixing device (13) comprises a fixing plate (131), a vertical plate (132) is fixedly mounted on the top of the fixing plate (131), a fixing tube (133) is fixedly mounted on the side of the vertical plate (132), a screw rod (134) is installed through the internal thread of the fixing tube (133), and a clamping plate (135) is fixedly mounted on the top of the screw rod (134).

6. The noise reduction device for EMC testing equipment according to claim 1, characterized in that: The noise reduction box (1) comprises a protective outer layer (101), a first sound insulation board (102) is fixedly installed inside the protective outer layer (101), a second sound insulation board (103) is fixedly installed inside the first sound insulation board (102), and a sound-absorbing cotton (104) is fixedly installed inside the second sound insulation board (103).

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