Load cabinets for EMC testing

Abstract

The present invention provides a load cabinet for EMC testing, comprising the following structures: a cabinet body; an air intake guide sleeve, a cover shell is provided on the top of the air intake guide sleeve, a transition pipe is fixedly provided in the middle of the rear end of the cover shell, the left and right sides of the rear end of the cover shell are respectively fixedly connected to the left and right sides of the truss, the blocking structure formed by the guide pipe and the windproof film facilitates the air volume generated by the axial flow fan and the cross-flow fan when working to perform forced air cooling and heat dissipation treatment on the resistors in the working state in the resistor array as much as possible, the guide pipe and the air guide hole cooperate to introduce hot air into the transition pipe, the external pipe and the exhaust fan cooperate to timely extract the hot air in the transition pipe through the exhaust pipe, the device realizes layered heat dissipation treatment according to the calling situation of the resistor array, and at the same time effectively drains the hot air in the cabinet to avoid heat accumulation in the cabinet and temperature abnormality affecting the working stability of the load cabinet.

Description

Technical Field

[0001] The invention mainly relates to the field of load cabinets, and in particular to a load cabinet for EMC testing. Background Art

[0002] Load cabinets are used in EMC test projects to detect the output power or load capacity of the power supply equipment under test. Commonly used ones are resistive load cabinets. Large fans are usually installed at the bottom of the cabinet to force ventilation of the resistor array installed in the load cabinet to avoid excessive resistance temperature and abnormal resistance value affecting the accuracy of equipment test results.

[0003] The inventor proposes a load cabinet for EMC testing. According to the load cabinet's call to the resistor array, a blocking structure and a related airflow guiding structure are arranged above the resistors in the working state in the resistor array to discharge the hot air generated by the forced air cooling treatment in time to prevent the heat from continuing to affect the non-working resistors in the resistor array in the load cabinet. At the same time, the rapid removal of hot air can achieve rapid cooling and heat dissipation of the working resistors in the resistor array, thereby improving the working stability of the load cabinet. Summary of the invention

[0004] 1. Problems to be solved by the invention:

[0005] The present invention provides a load cabinet for EMC testing, which is used to solve the technical problem of insufficient forced air cooling and heat dissipation of the existing resistor array mentioned in the above background technology, and optimizes the forced air cooling and heat dissipation measures of the existing resistor array.

[0006] 2. Technical solution:

[0007] To achieve the above object, the present invention provides a technical solution: a load cabinet for EMC testing, comprising the following structure:

[0008] A cabinet body, wherein a first panel, a second panel and a third panel are fixedly disposed on the front side to the rear side of the inner wall of the cabinet body, and a resistor array is fixedly disposed at equal intervals on the rear side of the second panel.

[0009] An operation panel is fixedly arranged on the front side of the first panel, and a heat dissipation area is divided between the second panel and the opposite side of the third panel.

[0010] An air intake guide sleeve, wherein a cover shell is disposed on the top of the air intake guide sleeve, a transition pipe is fixedly disposed in the middle of the rear end of the cover shell, and the left and right sides of the rear end of the cover shell are respectively fixedly connected to the left and right sides of the truss.

[0011] Furthermore, air holes are fixedly arranged on the front and rear sides of the cabinet, and the bottom of the inner wall of the cabinet is clamped with the bottom end of the air inlet guide sleeve.

[0012] Furthermore, the front and rear ends of the air inlet guide sleeve are respectively fixedly provided with a first air inlet and a second air inlet, and the top of the air inlet guide sleeve is fixedly provided with a first air outlet.

[0013] The four corners of the inner wall of the bottom end of the air inlet guide sleeve are movably connected with support rollers, and the outer sides of the four support rollers are movably connected to the four corners of the inner wall of the dust filter cloth sleeve respectively, and the top of the dust filter cloth sleeve extends to below the first air outlet.

[0014] Furthermore, the cover shell is arranged at the bottom of the opposite sides of the second panel and the third panel, and a docking sleeve is fixedly provided at the bottom of the cover shell, and the bottom of the docking sleeve cooperates with the first air outlet, and a mounting frame is fixedly provided in the middle of the docking sleeve, and an axial flow fan is fixedly provided in the middle of the mounting frame, and the air outlet of the axial flow fan faces the resistor array, and cross-flow fans are fixedly provided at the left and right ends of the inner wall of the mounting frame, and the air outlet of the cross-flow fan faces the left and right sides of the resistor array.

[0015] Furthermore, a third air inlet is fixedly provided from the middle to the bottom front side of the transition pipe, and a sealing sheet is symmetrically bonded from the middle to the bottom front side of the transition pipe, and the sealing sheet cooperates with the third air inlet.

[0016] Furthermore, an exhaust duct is fixedly arranged at the top of the transition duct, an auxiliary hole is fixedly arranged at the bottom of the exhaust duct, memory metal sheets are arranged in pairs in the auxiliary hole, and opposite sides of the two memory metal sheets are divided into an air gap.

[0017] An external pipe is fixedly arranged at the front end of the exhaust pipe, and an exhaust fan is fixedly arranged at the middle part of the external pipe.

[0018] Furthermore, a lifting linear module is fixedly provided at the right end of the truss, and a double-slide linear module is fixedly provided at the left movable end of the lifting linear module.

[0019] The two moving ends of the double-slide linear module are both movably connected to a slide seat, a shaft rod is welded to the front end of the slide seat, a sleeve is movably sleeved on the outer side of the shaft rod, a flat gear is fixed on the rear side of the sleeve, and a windproof film is fixed on the outer side of the sleeve.

[0020] A rack is fixedly arranged on the front side of the housing of the double-slide linear module, and the left and right ends of the rack are respectively meshed with the bottoms of the two flat gears.

[0021] Furthermore, a guide tube is fixedly provided in the middle part of the shell of the double-slide linear module, and an air guide hole is fixedly provided at the bottom of the guide tube, the air inlet side of the air guide hole extends to the top of the axial flow fan, the left and right sides of the guide tube are respectively clamped with the opposite sides of the two windproof membranes, and the rear end of the guide tube is movably sleeved with a sealing seat, and the left and right sides of the sealing seat cooperate with the sealing sheet, and the rear end air outlet of the guide tube extends to the inner side of the transition tube.

[0022] 3. Beneficial effects:

[0023] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0024] The present invention provides a load cabinet for EMC testing. The blocking structure formed by the guide pipe and the windproof film facilitates the air volume generated by the axial flow fan and the cross-flow fan during operation to perform forced air cooling and heat dissipation treatment on the resistors in the working state in the resistor array as much as possible. The guide pipe and the air guide hole cooperate to introduce the hot air into the transition pipe. The external pipe and the exhaust fan cooperate to timely extract the hot air in the transition pipe through the exhaust pipe. The device realizes layered heat dissipation treatment according to the calling situation of the resistor array, and effectively drains the hot air in the cabinet at the same time, so as to avoid the accumulation of heat in the cabinet and the temperature abnormality that affects the working stability of the load cabinet.

[0025] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A three-dimensional diagram of the novel structure of the present invention;

[0027] Figure 2 A three-dimensional diagram of a novel first panel structure of the present invention;

[0028] Figure 3 is a three-dimensional diagram of the novel third panel structure of the present invention;

[0029] Figure 4 A half-section stereoscopic view of the novel air intake guide sleeve structure of the present invention;

[0030] Figure 5 A half-section stereoscopic view of the novel exhaust duct structure of the present invention;

[0031] Figure 6 A half-section stereoscopic view of the novel windproof membrane structure of the present invention;

[0032] Figure 7 The novel Figure 6 A magnified view of the structure at center A;

[0033] Figure 8 The novel Figure 6 A magnified view of the structure at B in the middle;

[0034] Fig. 9 A three-dimensional diagram of a novel resistor array structure of the present invention;

[0035] Fig.10 A half-section perspective view of the novel cover structure of the present invention;

[0036] Fig.11 The novel Fig.10 A magnified view of the structure at C in the middle;

[0037] Fig.12 It is a three-dimensional diagram of the novel transition tube structure of the present invention;

[0038] Fig.13 A half-section stereoscopic view of the novel guide tube structure of the present invention;

[0039] Fig.14 The novel Fig.13 A magnified view of the structure at D in the middle;

[0040] Fig.15 It is a front cross-sectional view of the novel exhaust duct structure of the present invention;

[0041] Fig.16 It is a left view of the novel axial flow fan structure of the present invention.

[0042] Reference numerals:

[0043] Cabinet-1; first panel-11; second panel-12; third panel-13; resistor array-14;

[0044] Inlet guide sleeve-2; support roller-21; dust filter cloth sleeve-22;

[0045] Cover-3; docking sleeve-31; mounting frame-32; axial flow fan-33; cross flow fan-34;

[0046] Transition pipe-4; sealing sheet-41;

[0047] Exhaust pipe-5; auxiliary hole-51; memory metal sheet-52;

[0048] External pipe-6; Exhaust fan-61;

[0049] Truss-7; lifting linear module-71; double slide linear module-72; rack-73;

[0050] Sliding seat-8; shaft-81; sleeve-82; flat gear-83; windproof membrane-84;

[0051] Guide tube-9; air guide hole-91; sealing seat-92. DETAILED DESCRIPTION

[0052] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0053] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element; when an element is considered to be "connected to" another element, it may be directly connected to the other element or there may also be a central element; the terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items. Example

[0055] Reference Figure 1-16 , a load cabinet for EMC testing, comprising the following structure:

[0056] The cabinet 1 has a first panel 11, a second panel 12 and a third panel 13 fixedly disposed on the front and rear sides of the inner wall of the cabinet 1, and a resistor array 14 fixedly disposed at equal intervals on the rear side of the second panel 12.

[0057] An operation panel is fixedly arranged on the front side of the first panel 11 , and a heat dissipation area is defined between opposite sides of the second panel 12 and the third panel 13 .

[0058] The air intake guide sleeve 2 has a cover shell 3 on its top, a transition pipe 4 is fixedly arranged in the middle of the rear end of the cover shell 3, and the left and right sides of the rear end of the cover shell 3 are fixedly connected to the left and right sides of the truss 7 respectively.

[0059] In this embodiment, air holes are fixedly provided on the front and rear sides of the cabinet 1 , and the bottom of the inner wall of the cabinet 1 is snap-fitted with the bottom end of the air inlet guide sleeve 2 .

[0060] The ventilation holes are designed to prevent the formation of a closed space inside the cabinet 1 that affects the heat dissipation of the resistor array 14 . A dustproof net may be added to the ventilation holes of the cabinet 1 according to the requirements of the use environment.

[0061] At the same time, the design of the air holes allows the air holes of the cabinet 1 to assist in exhausting air when the air volume generated by the cross-flow fan 34 and the axial flow fan 33 cannot be discharged in time through the exhaust fan 61 and the transition duct 4 and other structural combinations.

[0062] The first panel 11 is equipped with an operation panel, the second panel 12 is a mounting support structure for the resistor array 14 , and the third panel 13 and the second panel 12 isolate the mounting workpiece of the resistor array 14 from the external environment.

[0063] In this embodiment, the front and rear ends of the air inlet guide sleeve 2 are respectively fixedly provided with a first air inlet and a second air inlet, and the top of the air inlet guide sleeve 2 is fixedly provided with a first air outlet.

[0064] The four corners of the bottom inner wall of the air inlet guide sleeve 2 are movably connected with support rollers 21, and the outer sides of the four support rollers 21 are movably connected to the four corners of the inner wall of the dust filter cloth sleeve 22, and the top of the dust filter cloth sleeve 22 extends to the bottom of the first air outlet.

[0065] During the operation of the axial flow fan 33 or the cross flow fan 34 , the main air circulation input channels in the cabinet 1 are the air intake guide sleeve 2 , the docking sleeve 31 , and the cover 3 .

[0066] The dust filter cloth cover 22 is unfolded in the air inlet guide cover 2 by the support roller 21 , and the dust filter cloth cover 22 cooperates with the first air outlet of the air inlet guide cover 2 to prevent external dust from entering the installation space of the resistor array 14 .

[0067] In this embodiment, the cover shell 3 is arranged at the bottom of the opposite sides of the second panel 12 and the third panel 13. A docking sleeve 31 is fixedly provided at the bottom of the cover shell 3. The bottom of the docking sleeve 31 cooperates with the first air outlet. A mounting frame 32 is fixedly provided in the middle of the docking sleeve 31. An axial flow fan 33 is fixedly provided in the middle of the mounting frame 32. The air outlet of the axial flow fan 33 faces the resistor array 14. Cross-flow fans 34 are fixedly provided at the left and right ends of the inner wall of the mounting frame 32. The air outlet of the cross-flow fan 34 faces the left and right sides of the resistor array 14.

[0068] The docking sleeve 31 cooperates with the cover shell 3 to facilitate the axial flow fan 33 and the cross flow fan 34 to perform forced air cooling on the resistor array 14 through the air intake guide sleeve 2.

[0069] In this embodiment, a third air inlet is fixedly provided from the middle to the bottom front side of the transition pipe 4, and a sealing sheet 41 is symmetrically bonded from the middle to the bottom front side of the transition pipe 4, and the sealing sheet 41 cooperates with the third air inlet.

[0070] Taking into account the different number of calls to the resistor array 14 in the test, the transition tube 4 is arranged to cooperate with the guide tube 9. In order to prevent the guide tube 9 from moving up and down in front of the transition tube 4 and causing damage to the sealing of the transition tube 4, a sealing sheet 41 is arranged to cooperate with a sealing seat 92 to improve the air tightness of the connection between the guide tube 9 and the transition tube 4, so that the guide tube 9 is conveniently placed above the resistor in the resistor array 14 that is in a working state, and the hot air can be guided into the transition tube 4 in time to prevent the hot air from affecting the resistor that is not working.

[0071] In this embodiment, an exhaust pipe 5 is fixedly provided at the top of the transition pipe 4, and an auxiliary hole 51 is fixedly provided at the bottom of the exhaust pipe 5. Memory metal sheets 52 are arranged in pairs in the auxiliary hole 51, and opposite sides of the two memory metal sheets 52 are divided into air gaps.

[0072] An external pipe 6 is fixedly disposed at the front end of the exhaust pipe 5 , and an exhaust fan 61 is fixedly disposed at the middle portion of the external pipe 6 .

[0073] Taking into account that the blocking structure composed of the windproof membrane 84 and the guide pipe 9 cannot form a complete shielding inside the cabinet 1, through the combination of the auxiliary hole 51 on the exhaust pipe 5 and the memory metal sheet 52 that is deformed by heat, when the ambient temperature in the area where the working resistor is located is abnormal, the memory metal sheet 52 is deformed by heat, and the external pipe 6 and the exhaust fan 61 cooperate with the cross-flow fan 34 to cool down the non-working resistor.

[0074] The operation of the exhaust fan 61 can improve the exhaust effect of the combination of the transition pipe 4 and the guide pipe 9, further reduce the degree of hot air overflow, and prevent excessive hot air from entering the installation space of the non-working resistor.

[0075] In this embodiment, a lifting linear module 71 is fixedly provided at the right end of the truss 7 , and a double-slide linear module 72 is fixedly provided at the left movable end of the lifting linear module 71 .

[0076] The two moving ends of the double-slide linear module 72 are movably connected to the slide 8, the front end of the slide 8 is welded with a shaft 81, the outer side of the shaft 81 is movably sleeved with a sleeve 82, the rear side of the sleeve 82 is fixed with a flat gear 83, and the outer side of the sleeve 82 is fixed with a windproof membrane 84.

[0077] A rack 73 is fixedly disposed on the front side of the housing of the double-slide linear module 72 , and the left and right ends of the rack 73 are respectively meshed with the bottoms of the two flat gears 83 .

[0078] The lifting module completes the working position of the guide tube 9 and the windproof film 84 at the front of the transition tube 4, making it convenient for the equipment to adjust the working height of the guide tube 9 and the windproof film 84 according to the call of the resistor array 14. The cooperation of the double-slide linear module 72 and the slide seat 8 completes the deployment and recovery of the windproof film 84 on the left and right sides of the guide tube 9. A combination of a sleeve 82, a flat gear 83 and a rack 73 is provided to realize the winding and releasing processing of the windproof film 84 outside the sleeve 82, so as to facilitate the height adjustment of the guide tube 9 in the resistor array 14 after the windproof film 84 is wound up.

[0079] In this embodiment, a guide tube 9 is fixedly provided in the middle part of the shell of the double-slide linear module 72, and an air guide hole 91 is fixedly provided at the bottom of the guide tube 9. The air inlet side of the air guide hole 91 extends to the top of the axial flow fan 33. The left and right sides of the guide tube 9 are respectively clamped with the opposite sides of the two windproof membranes 84. The rear end of the guide tube 9 is movably sleeved with a sealing seat 92. The left and right sides of the sealing seat 92 cooperate with the sealing sheet 41. The rear end air outlet of the guide tube 9 extends to the inner side of the transition tube 4.

[0080] The blocking structure formed by the guide pipe 9 and the windproof membrane 84 facilitates the air volume generated by the axial flow fan 33 and the cross-flow fan 34 during operation to perform forced air cooling and heat dissipation treatment on the resistors in the resistor array 14 in a working state as much as possible. The guide pipe 9 and the air guide hole 91 cooperate to introduce the hot air into the transition pipe 4. The external pipe 6 and the exhaust fan 61 cooperate to timely extract the hot air in the transition pipe 4 through the exhaust pipe 5, so that the device can achieve layered heat dissipation treatment according to the call status of the resistor array 14. At the same time, the hot air in the cabinet 1 is effectively drained to avoid heat accumulation in the cabinet 1 and temperature abnormality affecting the working stability of the load cabinet.

[0081] The above-described embodiments only express a certain implementation mode of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A load cabinet for EMC testing, characterized in that: Includes the following structure: A cabinet (1), wherein a first panel (11), a second panel (12) and a third panel (13) are fixedly provided on the inner wall of the cabinet (1) from the front side to the rear side, respectively, and a resistor array (14) is fixedly provided at equal intervals on the rear side of the second panel (12); An operation panel is fixedly arranged on the front side of the first panel (11), and a heat dissipation zone is divided between the second panel (12) and the opposite side of the third panel (13); An air intake guide sleeve (2), wherein a cover shell (3) is provided on the top of the air intake guide sleeve (2), a transition pipe (4) is fixedly provided at the middle of the rear end of the cover shell (3), and the left and right sides of the rear end of the cover shell (3) are respectively fixedly connected to the left and right sides of the truss (7); An external pipe (6) is fixedly provided at the front end of the exhaust pipe (5), and an exhaust fan (61) is fixedly provided at the middle part of the external pipe (6); A lifting linear module (71) is fixedly provided at the right end of the truss (7), and a double-slide linear module (72) is fixedly provided at the left movable end of the lifting linear module (71); Both movable ends of the double-slide linear module (72) are movably connected to a slide seat (8), a shaft (81) is welded to the front end of the slide seat (8), a sleeve (82) is movably sleeved on the outer side of the shaft (81), a flat gear (83) is fixedly provided on the rear side of the sleeve (82), and a windproof film (84) is fixedly provided on the outer side of the sleeve (82); A rack (73) is fixedly provided on the front side of the housing of the double-slide linear module (72), and the left and right ends of the rack (73) are respectively meshed with the bottoms of two flat gears (83); A guide tube (9) is fixedly provided in the middle of the shell of the double-slide linear module (72), an air guide hole (91) is fixedly provided at the bottom of the guide tube (9), the air inlet side of the air guide hole (91) extends to the top of the axial flow fan (33), the left and right sides of the guide tube (9) are respectively clamped with the opposite sides of the two windproof membranes (84), the rear end of the guide tube (9) is movably sleeved with a sealing seat (92), the left and right sides of the sealing seat (92) cooperate with the sealing sheet (41), and the rear end air outlet of the guide tube (9) extends to the inner side of the transition tube (4); The cover shell (3) is arranged at the bottom of the opposite sides of the second panel (12) and the third panel (13); a docking sleeve (31) is fixedly provided at the bottom of the cover shell (3); the bottom of the docking sleeve (31) cooperates with the first air outlet; a mounting frame (32) is fixedly provided at the middle of the docking sleeve (31); an axial flow fan (33) is fixedly provided at the middle of the mounting frame (32); an air outlet of the axial flow fan (33) faces the resistor array (14); and cross-flow fans (34) are fixedly provided at both left and right ends of the inner wall of the mounting frame (32); the air outlet of the cross-flow fan (34) faces the left and right sides of the resistor array (14); An exhaust pipe (5) is fixedly arranged at the top of the transition pipe (4), and an auxiliary hole (51) is fixedly arranged at the bottom of the exhaust pipe (5). Memory metal sheets (52) are arranged in pairs in the auxiliary holes (51), and opposite sides of the two memory metal sheets (52) are divided into an air gap.

2. The load cabinet for EMC testing according to claim 1, characterized in that: The front and rear sides of the cabinet body (1) are both provided with air holes, and the bottom of the inner wall of the cabinet body (1) is clamped with the bottom end of the air intake guide sleeve (2).

3. The load cabinet for EMC testing according to claim 1, characterized in that: The front and rear ends of the air inlet guide sleeve (2) are respectively provided with a first air inlet and a second air inlet, and the top of the air inlet guide sleeve (2) is provided with a first air outlet; Support rollers (21) are movably connected at the four corners of the inner wall of the bottom end of the air inlet guide sleeve (2), and the outer sides of the four support rollers (21) are movably connected to the four corners of the inner wall of the dust filter sleeve (22), respectively, and the top of the dust filter sleeve (22) extends to below the first air outlet.

4. The load cabinet for EMC testing according to claim 1, characterized in that: A third air inlet is fixedly provided from the middle to the bottom front side of the transition pipe (4), and a sealing sheet (41) is symmetrically bonded from the middle to the bottom front side of the transition pipe (4), the sealing sheet (41) being matched with the third air inlet.

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