Heat dissipation air duct structure of load cabinet for EMC test

Abstract

The utility model provides a heat radiation air channel structure of a load cabinet for EMC test, comprising the following structures: a box body, the bottom and the top of which are respectively fixedly provided with an air inlet channel and an air outlet channel; a plurality of installation pipes are fixedly arranged on the rear side of the auxiliary air channel, air supply pipes are fixedly arranged on the rear sides of the installation pipes, a large amount of heat is generated in the working process of the resistor arrays, the air inlet channel, the axial flow fan and the cross-flow fan are matched to carry out forced air cooling heat dissipation treatment on the resistor arrays, and according to the starting number of the resistor arrays, the air inlet channel, the axial flow fan and the cross-flow fan are matched. The auxiliary air channel, the air supply fan and the air supply pipe are matched to perform air cooling heat dissipation treatment close to the resistor array, the axial flow fan and the cross flow fan perform forced ventilation treatment on the whole resistor array, and the air supply fan and the air supply pipe perform close ventilation treatment on components in the resistor array in a working state, so that the air circulation efficiency in the resistor array is improved; and the structural complexity of equipment is reduced, and subsequent use and maintenance are facilitated.

Description

Technical Field

[0001] This utility model mainly relates to the field of heat dissipation equipment technology, specifically to a heat dissipation air duct structure for a load cabinet used for EMC testing. Background Technology

[0002] The resistive load cabinets used in EMC testing are typically designed with forced air cooling devices inside, which blow air upwards from below the resistor array to dissipate heat from the resistor array.

[0003] An existing patent (publication number: CN119296900B) discloses a load cabinet for EMC testing, comprising the following structure: a cabinet body; an air inlet guide sleeve, the top of which is provided with a cover, a transition pipe fixedly provided at the middle of the rear end of the cover, and the left and right sides of the rear end of the cover being fixedly connected to the left and right sides of a truss, respectively. The barrier structure formed by the guide pipe and the windproof membrane facilitates the forced air cooling of the resistors in the resistor array by the air volume generated by the axial flow fan and the cross flow fan during operation. The guide pipe and the air vent cooperate to introduce hot air into the transition pipe, and the external pipe and the exhaust fan cooperate to extract the hot air in the transition pipe in a timely manner. This device achieves layered heat dissipation according to the utilization of the resistor array, and at the same time effectively guides the hot air in the cabinet to avoid the accumulation of heat in the cabinet and the abnormal temperature affecting the working stability of the load cabinet.

[0004] In implementing this solution, the inventors used a barrier structure to extract hot air in a timely manner after the resistor array was arranged, which effectively suppressed the heating of the resistor array in the load cabinet. Based on this research, the inventors made a simplified design and proposed a heat dissipation air duct structure for load cabinets used for EMC testing. The heat dissipation design of the load cabinet was further optimized by adopting a graded air supply treatment and combining it with the forced air cooling equipment at the bottom of the load cabinet to improve the airflow efficiency in the resistor array. Utility Model Content

[0005] 1. Technical problem solved by the utility model:

[0006] This invention provides a heat dissipation airflow structure for a load cabinet used for EMC testing, which simplifies the existing air-cooled design of load cabinets and reduces the cost of using the equipment.

[0007] 2. Technical Solution:

[0008] To achieve the above objectives, the technical solution provided by this utility model is: a heat dissipation airflow structure for a load cabinet used for EMC testing, comprising the following structure:

[0009] The housing has an air intake duct and an exhaust duct fixedly installed at its bottom and top, respectively;

[0010] An auxiliary air duct is provided, with multiple connecting pipes fixed to the rear side of the auxiliary air duct, and an air supply pipe fixed to the rear side of the connecting pipes.

[0011] Furthermore, a mounting plate is fixed in the middle of the housing, a resistor array is fixed on the top rear side of the mounting plate, an operation panel is fixed on the front side of the housing, and a mounting hole for cooperating with the auxiliary air duct air intake is fixed at the bottom of the operation panel.

[0012] Furthermore, a mounting bracket is fixedly provided at the top rear end of the air intake duct, and an axial fan is fixedly provided in the middle of the inner side of the mounting bracket. The top exhaust side of the axial fan faces the resistor array. Cross-flow fans are fixedly provided on both the left and right sides of the inner wall of the mounting bracket. The exhaust sides of the two cross-flow fans face the resistor array. The inner side of the mounting bracket is connected to the inner airflow channel of the air intake duct.

[0013] Furthermore, an exhaust fan is fixedly installed on the inner side of the front end of the exhaust duct, and an air inlet extending to the inner side of the rear end of the exhaust duct is fixedly installed at the bottom of the rear end.

[0014] Furthermore, an installation tube is snapped into the middle of the connecting pipe, and a rotating shaft is movably connected to the left and right sides of the rear end of the installation tube. A damper is fixed in the middle of the rotating shaft, and a reset elastic element is snapped into the top and bottom of the rotating shaft. The other end of the reset elastic element is snapped into the outer side of the installation tube, and a fan is fixed in the inner side of the front end of the installation tube.

[0015] Furthermore, the rear end of the air supply duct extends to the inner side of the resistor array, and an air supply hole is fixedly provided at the top of the air supply duct.

[0016] 3. Beneficial effects:

[0017] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0018] This utility model provides a heat dissipation air duct structure for a load cabinet used for EMC testing. During the operation of the resistor array, a large amount of heat is generated. The intake duct, axial fan and cross-flow fan work together to provide forced air cooling for the resistor array. Depending on the number of resistor arrays in use, auxiliary air ducts, exhaust fans and air ducts work together to provide air cooling close to the resistor array. The axial fan and cross-flow fan provide forced ventilation for the entire resistor array, while the exhaust fan and air duct provide close ventilation for the components in the resistor array during operation. This improves the air circulation efficiency in the resistor array, reduces the structural complexity of the equipment, facilitates subsequent use and maintenance, and realizes a comprehensive air cooling design for the load cabinet.

[0019] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0020] Figure 1 This is a perspective view of the structure of this utility model;

[0021] Figure 2 This is a three-dimensional view of the resistor array structure of this utility model;

[0022] Figure 3 This is a perspective view of the mounting plate structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the airflow direction of the structure of this utility model;

[0024] Figure 5 This is a three-dimensional view of the auxiliary airway structure of this utility model;

[0025] Figure 6 This is a half-sectional perspective view of the installation pipe structure of this utility model;

[0026] Figure 7 This is a utility model Figure 6 Enlarged view of the structure at point A in the middle.

[0027] Figure label:

[0028] Cabinet-1; Mounting plate-11; Resistor array-12; Operation panel-13;

[0029] Air intake duct-2; Mounting bracket-21; Axial fan-22; Cross-flow fan-23;

[0030] Exhaust duct-3; Exhaust fan-31;

[0031] Auxiliary airway-4;

[0032] Takeover -5;

[0033] Installation tube-6; Rotary shaft-61; Air damper-62; Reset elastic element-63; Supply fan-64;

[0034] Air supply duct-7; Air supply hole-71. Detailed Implementation

[0035] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0036] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element; the terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] See attached document Figure 1-7 This utility model provides a heat dissipation airflow structure for a load cabinet used for EMC testing, comprising the following structure:

[0039] The box body 1 has an air intake duct 2 and an exhaust duct 3 fixed at its bottom and top, respectively;

[0040] Auxiliary airway 4, with multiple connecting pipes 5 fixedly installed on the rear side of the auxiliary airway 4, and an air supply pipe 7 fixedly installed on the rear side of the connecting pipes 5.

[0041] In this embodiment, a mounting plate 11 is fixed in the middle of the housing 1, a resistor array 12 is fixed on the top rear side of the mounting plate 11, an operation panel 13 is fixed on the front side of the housing 1, and an installation hole for air intake of the auxiliary air passage 4 is fixed at the bottom of the operation panel 13.

[0042] The resistor array 12 is installed on the inner rear end of the lower housing 1, and the mounting plate completes the installation and isolation of the resistor array 12 and the operation panel 13.

[0043] In this embodiment, a mounting bracket 21 is fixedly provided at the top rear end of the air intake duct 2, and an axial flow fan 22 is fixedly provided in the middle of the inner side of the mounting bracket 21. The exhaust side of the top of the axial flow fan 22 faces the resistor array 12. Cross-flow fans 23 are fixedly provided on both the left and right sides of the inner wall of the mounting bracket 21. The exhaust side of the two cross-flow fans 23 faces the resistor array 12. The inner side of the mounting bracket 21 is connected to the inner airflow channel of the air intake duct 2.

[0044] The air intake duct 2 works in conjunction with the axial fan 22 and the cross-flow fan 23 in the mounting bracket 21 to guide the external air of the housing 1 into the resistor array 12 for forced air cooling of the resistor array 12.

[0045] In this embodiment, an exhaust fan 31 is fixedly provided on the inner side of the front end of the exhaust duct 3, and an air inlet extending to the inner side of the rear end of the exhaust duct 3 is fixedly provided at the bottom of the rear end.

[0046] The exhaust duct 3 works in conjunction with the exhaust fan 31 to promptly extract the hot air from the resistor array 12, preventing insufficient heat dissipation of the resistor array 12 due to the failure to expel hot air from the housing 1 in time.

[0047] In this embodiment, the middle of the connecting pipe 5 is fitted with an installation pipe 6, and the left and right sides of the rear end of the installation pipe 6 are movably connected with a rotating shaft 61. The middle of the rotating shaft 61 is fixed with a damper 62, and the top and bottom of the rotating shaft 61 are fitted with a reset elastic member 63. The other end of the reset elastic member 63 is fitted with the outer side of the installation pipe 6, and the inner side of the front end of the installation pipe 6 is fixed with a fan 64.

[0048] The reset elastic element 63 on the mounting tube 6 cooperates with the rotating shaft 61 to complete the closing of the damper 62 on the mounting tube 6. The operation of the fan 64 can blow the damper 62 open. The fan 64 sends the external air of the housing 1 into the housing 1 through the auxiliary air passage 4. The air supply pipe 7 cooperates with the connecting pipe 5 to blow air and dissipate heat close to the resistor array 12.

[0049] In this embodiment, the rear end of the air supply pipe 7 extends to the inner side of the resistor array 12, and the top of the air supply pipe 7 is fixed with an air supply hole 71.

[0050] The hierarchical setting of the air supply duct 7 in the resistor array 12 can determine the number of working fans 64 according to the number of active resistor array 12, so as to provide air-cooled heat dissipation treatment for the resistor array 12 in operation.

[0051] Detailed operating procedures:

[0052] During operation, the resistor array 12 generates a large amount of heat. The air intake duct 2, axial fan 22, and cross-flow fan 23 work together to provide forced air cooling for the resistor array 12. Depending on the number of resistor arrays 12 in use, the auxiliary air duct 4, exhaust fan 64, and air duct 7 work together to provide air cooling close to the resistor array 12. The axial fan 22 and cross-flow fan 23 provide forced ventilation for the entire resistor array 12, while the exhaust fan 64 and air duct 7 provide close ventilation for the components in the resistor array 12 during operation. This improves the air circulation efficiency in the resistor array 12, reduces the structural complexity of the equipment, facilitates subsequent use and maintenance, and realizes the comprehensive air cooling design of the load cabinet.

[0053] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A heat dissipation duct structure for a load cabinet used for EMC testing, characterized in that: Includes the following structure: The box (1) has an air intake (2) and an exhaust (3) fixed at its bottom and top, respectively. An auxiliary air duct (4) is provided with a plurality of connecting pipes (5) fixed on the rear side of the auxiliary air duct (4), and an air supply pipe (7) is fixed on the rear side of the connecting pipes (5).

2. The heat dissipation duct structure of the load cabinet for EMC testing according to claim 1, characterized in that: A mounting plate (11) is fixed in the middle of the housing (1), a resistor array (12) is fixed on the top rear side of the mounting plate (11), an operation panel (13) is fixed on the front side of the housing (1), and an installation hole for air intake of the auxiliary air passage (4) is fixed at the bottom of the operation panel (13).

3. The heat dissipation duct structure of the load cabinet for EMC testing according to claim 1, characterized in that: A mounting bracket (21) is fixedly provided at the top rear end of the air intake (2). An axial fan (22) is fixedly provided in the middle of the inner side of the mounting bracket (21). The exhaust side of the top of the axial fan (22) faces the resistor array (12). Cross-flow fans (23) are fixedly provided on both the left and right sides of the inner wall of the mounting bracket (21). The exhaust side of the two cross-flow fans (23) faces the resistor array (12). The inner side of the mounting bracket (21) is connected to the inner airflow channel of the air intake (2).

4. The heat dissipation duct structure of the load cabinet for EMC testing according to claim 1, characterized in that: An exhaust fan (31) is fixedly provided on the inner side of the front end of the exhaust duct (3), and an air inlet extending to the inner side of the rear end of the exhaust duct (3) is fixedly provided at the bottom of the rear end.

5. The heat dissipation duct structure of the load cabinet for EMC testing according to claim 1, characterized in that: The middle of the connecting pipe (5) is fitted with an installation pipe (6). The left and right sides of the rear end of the installation pipe (6) are movably connected with a rotating shaft (61). The middle of the rotating shaft (61) is fixed with a damper (62). The top and bottom of the rotating shaft (61) are fitted with a reset elastic element (63). The other end of the reset elastic element (63) is fitted with the outside of the installation pipe (6). The front end of the installation pipe (6) is fixed with a fan (64).

6. The heat dissipation duct structure of the load cabinet for EMC testing according to claim 1, characterized in that: The rear end of the air supply pipe (7) extends to the inside of the resistor array (12), and an air supply hole (71) is fixed on the top of the air supply pipe (7).

Images