Load resistance box

Abstract

The invention discloses a load resistance box. The load resistance box comprises a box body, a ventilation assembly and a load assembly, a heat dissipation channel is arranged in the box body; the ventilation assembly is arranged at an inlet or an outlet of the heat dissipation channel; the load assembly is arranged in the heat dissipation channel, the load assembly comprises a framework and a resistance tape, the framework is arranged in the heat dissipation channel, the resistance tape is wound on the framework, and at least part of the cross section of the resistance tape is provided with a bent part or a bent part. In the load assembly, the resistor belt is arranged, the contact area of the resistor and air is increased, the heat dissipation area is increased, and the heat dissipation effect is improved. The cross section of the resistance tape is bent or bent, so that the strength of the resistance tape is improved, when the resistance tape expands with heat and contracts with cold, the deformation of the resistance tape is avoided or reduced, the distortion and short circuit of the resistance tape are avoided or reduced, and the stable performance of the load resistance box is kept.

Description

Technical Field

[0001] The invention relates to the technical field of resistor devices, in particular to a load resistor box. Background Art

[0002] Resistors are commonly used electronic devices in the electrical field. According to design requirements, they can not only reduce voltage and limit current in the circuit, but also play a role in braking or discharging electricity to consume electrical energy.

[0003] The resistor described in the present invention is a high-power load resistor, which plays an important role in the circuit or equipment. The primary function of the high-power load resistor is to consume excess electricity. For example, excess electricity is generated in the equipment and circuit. In order to prevent the excess current from flowing to other components and equipment, the load resistor can be used to consume electricity. The specific application is motor braking. High-power load resistors are also commonly used in power supply detection and hardware detection. For example, a power supply device is connected through a high-power load resistor, and the power consumption of the load resistor is used to perform parameter testing and aging detection. When performing hardware function detection, the load resistor is often used as an analog product to detect the hardware function. In addition, the high-power load resistor also has the functions of buffering braking and protecting equipment.

[0004] Traditional load resistors are made by winding resistance wire or resistance strip on a certain insulating frame, with an additional encapsulation layer, which has the disadvantages of being large in size, heavy in weight, and slow in heat dissipation. In addition, in some load resistors with densely arranged resistors, the strip resistors can easily deform due to long-term operation, resulting in the risk of short circuits. Summary of the invention

[0005] In order to solve the technical problem in the prior art that the resistance belt is deformed due to long-term operation of the load resistor, one of the purposes of the present invention is to provide a load resistor box. The present invention adopts a special processing and installation method for the resistance belt to effectively prevent deformation and short circuit.

[0006] One of the purposes of the present invention is achieved by the following technical solution:

[0007] A load resistance box, comprising a box body, a ventilation component and a load component;

[0008] A heat dissipation channel is provided in the box;

[0009] The ventilation component is arranged at the inlet or outlet of the heat dissipation channel;

[0010] The load component is arranged in the heat dissipation channel, and the load component includes a frame and a resistance belt. The frame is arranged in the heat dissipation channel, and the resistance belt is wound on the frame. The cross section of the resistance belt has a bending portion or a folded portion at least partially.

[0011] Preferably, the skeleton comprises two bone bars, the two bone bars are arranged at intervals on both sides of the heat dissipation channel, and the bone bars are provided with a plurality of through holes distributed along the length direction thereof;

[0012] The resistance belt is passed through the through hole and arranged on the two bone strips, and the resistance belt is interlaced in a circuitous manner row by row.

[0013] Preferably, the skeleton comprises a plurality of bone bars, and the plurality of bone bars are arranged side by side in the heat dissipation passage at intervals, and the bone bars are provided with a plurality of through holes distributed along the length direction thereof;

[0014] The resistance belt is passed through the through hole and arranged on a plurality of the bone strips, and the resistance belt is interlaced in a circuitous manner row by row.

[0015] Preferably, the through hole is a flat long hole.

[0016] Preferably, the through hole penetrates to a side surface of the bone strip in the width direction.

[0017] Preferably, the load resistor box further comprises a plurality of mounting bars, and the mounting bars are arranged on the inner walls on both sides of the heat dissipation channel;

[0018] There are multiple load components, and the multiple load components are arranged side by side in the heat dissipation channel along the length direction of the heat dissipation channel, and the end of the bone bar is arranged on the installation bar.

[0019] Preferably, the mounting bar is provided with a mounting groove extending along its length direction;

[0020] The end of the bone strip is slidably arranged in the mounting groove corresponding to the mounting strip.

[0021] Preferably, the load resistance box further comprises a wiring board, on which a plurality of wiring terminals are provided, and the wiring terminals are connected to the load components.

[0022] Preferably, the ventilation component comprises a fan plate and a plurality of fans, the fan plate comprises a plurality of ventilation holes, the ventilation holes are arranged in a one-to-one correspondence with the fans, and the fans are arranged at the corresponding ventilation holes.

[0023] Preferably, the load resistor box further comprises an isolation frame, which is arranged in the heat dissipation channel and located between the ventilation component and the load component.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] In the present invention, the load assembly is arranged in the heat dissipation channel, and the ventilation assembly is used to increase the ventilation volume of the heat dissipation channel, thereby increasing the heat dissipation effect. In addition, a resistance belt is arranged in the load assembly to increase the area of ​​contact between the resistor and the air, increase the heat dissipation area, and increase the heat dissipation effect. The cross section of the resistance belt is curved or bent, which increases the strength of the resistance belt, avoids or reduces the deformation of the resistance belt when the resistance belt expands and contracts due to heat, avoids or reduces the twisting and short circuit of the resistance belt, and maintains the stable performance of the load resistance box. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the load resistance box of the present invention;

[0027] Figure 2 It is a structural schematic diagram of the load resistance box of the present invention from another perspective;

[0028] Figure 3 It is an exploded schematic diagram of the load resistance box of the present invention;

[0029] Figure 4 It is a schematic diagram of a cross section of a resistance belt in a load resistance box of the present invention;

[0030] Figure 5 It is an exploded schematic diagram of a load component in a load resistance box of the present invention;

[0031] Figure 6 It is a structural schematic diagram of the installation bar in the load resistance box of the present invention;

[0032] Figure 7 for Figure 6 A magnified view of the local area A;

[0033] Figure 8 It is a schematic diagram of the assembly of the mounting bar and the box body in the load resistance box of the present invention;

[0034] Fig. 9 It is a top view schematic diagram of the load resistance box of the present invention;

[0035] Fig.10 A resistor connection schematic diagram of one resistor connection embodiment of a load resistor box of the present invention;

[0036] Fig.11 for Fig.10 A simplified diagram of the resistor connection diagram;

[0037] Fig.12 This is a resistance connection schematic diagram of another resistance connection embodiment of the load resistance box of the present invention.

[0038] Description of the accompanying drawings:

[0039] 1. Box body; 11. Heat dissipation channel; 12. Fixing hole;

[0040] 2. Ventilation assembly; 21. Fan plate; 22. Fan;

[0041] 3. Load assembly; 31. Bone strip; 311. Through hole; 32. Resistance belt;

[0042] 4. Mounting strip; 41. Upper clamping strip; 42. Lower clamping strip; 43. Positioning member; 44. Mounting groove; 45. Connecting structure; 451. Connecting part; 452. Barb part; 453. Inner side surface; 46. Connecting plate;

[0043] 5. Terminal block; 51. Terminal block; 52. Bridge block. DETAILED DESCRIPTION

[0044] The following will be combined with the attached examples of the present application Figure 1 To Attachment Fig.12 , the technical solutions in the embodiments of the present application are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0045] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0046] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0047] like Figure 1-4A load resistor box is shown, and the load resistor box includes a box body 1, a ventilation component 2 and a load component 3. Among them, the box body 1 is the basic installation structure of the load resistor box, and a heat dissipation channel 11 is provided in the box body 1. At the same time, the heat dissipation channel 11 is also the installation area of ​​the load component 3. The ventilation component 2 is arranged at the entrance or outlet of the heat dissipation channel 11. The ventilation component 2 increases the ventilation volume of the heat dissipation channel 11 and increases the heat dissipation effect of the load component 3. The load component 3 is arranged in the heat dissipation channel 11. The load component 3 includes a skeleton and a resistor belt 32. The skeleton is arranged in the heat dissipation channel 11. The resistor belt 32 is wound on the skeleton, and the cross section of the resistor belt 32 has a bending portion or a bending portion at least partially. For example, Figure 4 As shown, a bend is provided in the middle, one end or both ends of the cross section of the resistor belt 32, and the bend extends along the length direction of the resistor belt 32. For another example, a bend is provided in the middle, one end or both ends of the cross section of the resistor belt 32, and the bend extends along the length direction of the resistor belt 32. For another example, the cross section of the resistor belt 32 is curved or bent as a whole.

[0048] In this embodiment, the load component 3 is arranged in the heat dissipation channel 11, and the ventilation component 2 is used to increase the ventilation volume of the heat dissipation channel 11, thereby increasing the heat dissipation effect. In addition, a resistance belt 32 is arranged in the load component 3 to increase the area of ​​contact between the resistor and the air, increase the heat dissipation area, and increase the heat dissipation effect. The cross section of the resistance belt 32 is curved or bent, which increases the strength of the resistance belt 32. When the resistance belt 32 expands and contracts due to heat, the deformation of the resistance belt 32 is avoided or reduced, and the twisting and short circuit of the resistance belt 32 are avoided or reduced, so as to maintain the stable performance of the load resistance box.

[0049] In addition, the present invention adopts a long strip resistor without substrate and outer packaging, which achieves the effect of small size, light weight and fast heat dissipation under the premise of the same power. Considering the risk that the strip resistor will easily deform due to long-term operation, the present invention adopts a special processing and installation method for the resistor belt to effectively prevent deformation and short circuit.

[0050] For the resistance band 32 cross section with a bent portion in the middle, at one end or at both ends, during actual processing, the bent structure can be processed at the corresponding position by pressing, and the specific shape is as follows: Figure 4 As shown in (a), (b), and (c) in FIG. 1 , a partially curved structure is provided on a straight cross section. For a resistor band 32 cross section having a curved portion in the middle, at one end, or at both ends, during actual processing, a curved structure can be processed at a corresponding position by pressing, and the specific shape is as follows: Figure 4As shown in (e), (f), and (g) in the figure, a partially bent structure is provided on a straight cross section. When the cross section of the resistor belt 32 is bent or folded as a whole, the resistor belt 32 can be processed by pressing in actual processing, so that the resistor belt 32 is bent or folded as a whole. The specific shape is as follows: Figure 4 As shown in (d) and (h) in the figure, the cross section is bent or folded as a whole.

[0051] When the resistance band 32 is deformed, the parts far from the middle are more likely to be deformed, and the two ends of the cross section are more likely to be deformed. In some preferred strengthening methods, a bending part or a bent part is provided at both ends of the cross section of the resistance band 32, and the end of the cross section of the resistance band 32 is strengthened to carry out targeted strength, thereby further increasing the strengthening effect and avoiding or reducing the twisting and short circuit of the resistance band 32.

[0052] Specifically, the box body 1 is a sheet metal hexahedron, which can be a cuboid or a cube, etc. The front and back of the box body 1 are connected, and the ventilation assembly 2 is arranged on the back of the box body 1 .

[0053] In some embodiments of winding the resistor belt 32, the resistor belt 32 is wound on the frame, the resistor belt 32 is interlaced row by row, and the resistor belt 32 continues to interlace, interlace, interlace, and interlace for many times, so as to be densely arranged in the heat dissipation channel 11. At the same time, two sections, a heat dissipation section and a roundabout section, are formed on the resistor belt 32. The roundabout section is located at the end of the heat dissipation section, and the roundabout section is a structure that is in direct contact with the frame.

[0054] The number of load components 3 can be one or more. When the number of load components 3 is more than one, the multiple load components 3 are arranged side by side in the heat dissipation channel 11 along the length direction of the heat dissipation channel 11. The multiple load components 3 can be connected in parallel or in series. In this way, more or longer resistors can be arranged in a limited space, the resistance value can be increased, and the working power can be improved.

[0055] In some embodiments of the skeleton, the skeleton may be a frame structure that matches the shape of the heat dissipation channel 11 . For example, when the cross section of the heat dissipation channel 11 is rectangular, the skeleton is a rectangular frame.

[0056] In some other embodiments of the skeleton, the skeleton includes two bone bars 31, and the two bone bars 31 are arranged at intervals on both sides of the heat dissipation channel 11, and the bone bars 31 are provided with a plurality of through holes 311 distributed along the length direction thereof. The resistance belt 32 is passed through the two bone bars 31 through the through holes 311, and the resistance belt 32 is interspersed in a circuitous manner row by row. Specifically, the two bone bars 31 are respectively arranged at the top and bottom of the heat dissipation channel 11, and the resistance belt 32 is wound around the upper and lower bone bars 31 through the through holes 311, and is interspersed in a circuitous manner along the left and right directions, so that the resistance belt 32 is densely wound around the two bone bars 31 in an arch shape. In this way, a longer resistor can be arranged in a limited space, the resistance value can be increased, and the working power can be improved.

[0057] In other embodiments of the skeleton, such as Figure 3 , Figure 5 As shown, the skeleton includes a plurality of bone bars 31, which are arranged side by side in a heat dissipation channel at intervals, and the bone bars 31 are provided with a plurality of through holes 311 distributed along the length direction thereof. The resistance belts 32 are passed through the through holes 311 on the plurality of bone bars 31, and the resistance belts 32 are interlaced in a circuitous manner row by row.

[0058] A plurality of bone bars 31 are arranged side by side in the heat dissipation channel at intervals. Specifically, the plurality of bone bars 31 include an upper bone bar, a lower bone bar and an intermediate bone bar. Two of the plurality of bone bars 31 are arranged at the top and bottom of the heat dissipation channel 11, respectively, that is, the upper bone bar and the lower bone bar are arranged at the top and bottom of the heat dissipation channel 11, respectively, and the intermediate bone bar is located between the upper bone bar and the lower bone bar. In this way, in a load assembly 3, in addition to the upper bone bar or the lower bone bar being fixed at the detour, the heat dissipation section is also fixed with the intermediate bone bar, which increases the supporting and fixing effect of the resistance belt. Specifically, the intermediate bone bar maintains the heat dissipation end of the fixed resistance belt, reducing the deformation and distortion generated under high-speed airflow; the intermediate bone bar limits the deformation amplitude of the heat dissipation section when heating, reduces the deformation and distortion of the resistance belt 32, and avoids the resistance belt 32 from shorting. The resistance belt 32 is wound on the upper and lower bone bars 31 through the through hole 311, and is detour and interspersed in the left and right directions, so that the resistance belt 32 is densely wound on the two bone bars 31 in an arch shape. In this way, longer resistors can be arranged in a limited space, increasing the resistance value and improving the working power.

[0059] Furthermore, the through hole 311 is a flat long hole. When the resistance belt 32 passes through the through hole 311 , the cross-sectional shape of the resistance belt 32 has better adaptability to the through hole 311 , and can better limit the deformation and distortion of the resistance belt 32 .

[0060] Of course, in order to further improve the limiting effect, the through hole 311 is a long hole whose shape is adapted to the cross-sectional shape of the resistance belt 32 .

[0061] When the bone strip 31 is used as the skeleton, the load assembly 3 is assembled, and some auxiliary fixing structures are needed to support and fix the position of the skeleton, and then the resistance belt 32 is wound, and then the load assembly 3 is installed into the heat dissipation channel 11 together with the auxiliary fixing structure, and finally the auxiliary fixing structure is disassembled, which has the problem of complex assembly of the load assembly 3. In some improved embodiments of the bone strip 31, the hole 311 penetrates to one side of the width direction of the bone strip 31, so that when assembling, the bone strip 31 can be first installed into the heat dissipation channel 11, and then the resistance belt 32 is wound on each bone strip 31 from the side through the hole 311, so that it has good assembly convenience.

[0062] In some embodiments of the load resistor box, the load resistor box further includes a plurality of mounting bars 4, which are arranged on the inner walls on both sides of the heat dissipation channel 11. The mounting bars 4 extend along the length direction of the heat dissipation channel 11. In other words, the length direction of the mounting bars 4 is parallel to the length direction of the heat dissipation channel 11, and preferably the length direction of the mounting bars 4 is parallel to or in the same direction as the length direction of the heat dissipation channel 11.

[0063] The mounting strips 4 are arranged on the inner walls on both sides of the heat dissipation channel 11. Specifically, the mounting strips 4 are arranged in pairs, and the number of pairs of mounting strips 4 corresponds to the number of bone strips 31 in the load assembly 3. The two mounting strips 4 in pairs are arranged on the inner walls on both sides of the heat dissipation channel 11, specifically, the left inner wall and the right inner wall of the heat dissipation channel 11. The number of pairs of mounting strips 4 corresponds to the number of bone strips 31 in the load assembly 3. For example, when the frame includes two bone strips 31, the mounting strips 4 are arranged in two pairs, and when the frame includes five bone strips 31, the mounting strips 4 are arranged in five pairs.

[0064] There are multiple load assemblies 3, which are arranged side by side in the heat dissipation channel 11 along the length direction of the heat dissipation channel 11, and the ends of the bone strips 31 are arranged on the mounting strips 4, or in other words, the two ends of the bone strips 31 are arranged on the corresponding paired mounting strips 4.

[0065] In this embodiment, after the mounting strip 4 is provided, the inner walls on both sides of the heat dissipation channel 11 have a structure capable of assembling or assisting in assembling the bone strip 31, and more load components 3 can be assembled within the length range of the mounting strip 4, effectively providing assembly convenience for the skeleton or bone strip 31.

[0066] For the installation strip 4, specifically, Figure 6 As shown, the mounting strip 4 is provided with a mounting groove 44 extending along its length. The end of the bone strip 31 is slidably arranged in the mounting groove 44 of the corresponding mounting strip 4, so that the bone can slide into the heat dissipation channel 11 along the mounting groove 44, and the assembly and disassembly can be performed by sliding, which further improves the convenience of assembly and disassembly.

[0067] In some further embodiments of the mounting strip 4, the mounting strip 4 includes an upper clamping strip 41, a lower clamping strip 42 and a stopper 43. There is a gap between the upper clamping strip 41 and the lower clamping strip 42, and the gap is a mounting groove 44. The first end of the upper clamping strip 41 is fixedly connected to the first end of the lower clamping strip 42, and the stopper 43 is detachably connected to the second end of the upper clamping strip 41 and the second end of the lower clamping strip 42, closing the passage for the bone strip 31 to be installed in or slide out of the mounting groove 44.

[0068] Specifically, the limiting member 43 can be a fastening screw, and the second end of the upper clamping strip 41 and the second end of the lower clamping strip 42 close the channel for the bone strip 31 to slide in and out through the fastening screw, thereby limiting the position of the bone strip 31. When the bone strip 31 is installed in the installation groove 44, the end of the bone strip 31 extends into the installation groove 44, that is, the end of the bone strip 31 is cushioned between the upper clamping strip 41 and the lower clamping strip 42. When the fastening screw connects the second end of the upper clamping strip 41 and the second end of the lower clamping strip 42, the second end of the upper clamping strip 41 and the second end of the lower clamping strip 42 can be prevented from being excessively pushed by the fastening screw.

[0069] The limiting member 43 can also be a pluggable pin, such as a cotter pin, and the second end of the upper clamping strip 41 and the second end of the lower clamping strip 42 are both provided with a pluggable pin hole. The cotter pin passes through the two pluggable pin holes in sequence, and then the opening of the cotter pin is bent, thereby preventing the cotter pin from falling off and limiting the position of the bone strip 31.

[0070] The mounting strip 4 is disposed on the inner wall of the heat dissipation channel 11 , and an upper clamping strip 41 and a lower clamping strip 42 are fixed respectively, for example, the upper clamping strip 41 and the lower clamping strip 42 are fixed respectively by screws.

[0071] In some other installation embodiments of the mounting strip 4, such as Figure 6 , Figure 7 As shown, the mounting bar 4 is provided with a connection structure 45 extending outward from the box body 1, the connection structure 45 is located on the side of the mounting bar 4 away from the load assembly 3, the connection structure 45 includes a connection portion 451 and a barb portion 452, and the side wall of the box body 1 is provided with a fixing hole 12 for the barb portion 452 to pass through. Specifically, the upper clamping bar 41 and the lower clamping bar 42 are both provided with a connection structure 45 extending outward from the box body 1.

[0072] Of course, when the connection structure 45 is made of metal, the connection portion 451 protrudes from the mounting strip 4 along the first direction, and the barb portion 452 extends along the lateral direction of the connection portion 451, or in other words, the barb portion 452 extends along a direction perpendicular to the first direction. Specifically, the barb portion 452 is in the shape of a long strip, and the connection portion 451 is perpendicular to the barb portion 452. The shape of the fixing hole 12 is adapted to the shape of the connection structure 45, including being adapted to the shape of the barb portion 452. When the connection portion 451 extends into the fixing hole 12, the barb portion 452 protrudes from the outer surface of the box body 1. At this time, the barb portion 452 is bent with the help of a tool, and the ductility of the metal is used to make the barb portion 452 partially deviate from the fixing block hole, so that the barb portion 452 truly becomes a barb structure, thereby fixing the mounting strip 4.

[0073] Furthermore, if Figure 7 , Figure 8 As shown, the inner side surface 453 of the barb portion 452 is the side surface close to the surface of the box body 1, or the inner side surface 453 of the barb portion 452 faces the inside of the box body 1, and the inner side surface 453 of the barb portion 452 is inclined. The angle between the inner side surface 453 and the surface of the box body 1 is α. As it approaches the end of the barb portion 452, the inner side surface 453 of the barb portion 452 gradually moves away from the surface of the box body 1. The length of the connecting portion 451 is less than the thickness of the box body 1, and at least the end of the barb portion 452 passes over the fixing hole 12 and protrudes from the surface of the box body 1. In this way, the barb portion 452 is partially located in the fixing hole 12. When the barb portion 452 is bent, the size of the barb portion 452 changes gradually due to the inclined setting of the inner side surface 453 of the barb portion 452. As the bending amount of the barb portion 452 increases, the extrusion force between the barb portion 452 and the surface of the box body 1 increases, and the installation strip 4 is installed more firmly. When the mounting bar 4 is subsequently moved, the barb portion 452 can be bent again using a tool to increase the bending amount, so that the mounting bar 4 can be fixed again.

[0074] For the aforementioned α, the angle range is greater than zero degree and less than twenty degrees.

[0075] The surface of the mounting bar 4 close to the box body 1 is a fixed surface. When a mounting groove 44 is provided on the mounting bar 4, connecting structures 45 are provided at positions corresponding to both sides of the mounting groove 44 on the fixed surface. In other words, connecting structures 45 are provided at the upper and lower parts of the fixed surface. In this way, two rows of connecting structures 45 are formed on the fixed surface. The two rows of connecting structures 45 effectively enhance the assembly stability of the mounting bar 4, thereby providing assembly stability of the load component 3.

[0076] Regarding the specific processing method of the connection structure 45, such as Figure 7 As shown, the connection structure 45 can be cut out on the fixing surface of the mounting strip 4 by punching, and then the connection structure 45 is punched to protrude toward the fixing surface.

[0077] When the connection structure 45 is made of plastic, the barb portion 452 is elastic. When the mounting bar 4 is assembled, the elasticity of the barb portion 452 is utilized to enable the barb portion 452 to be inserted into the fixing hole 12 , thereby fixing the mounting bar 4 .

[0078] The first end of the upper clamping strip 41 and the first end of the lower clamping strip 42 are fixedly connected. Specifically, the mounting strip 4 further includes a connecting plate 46 , and two ends of the connecting plate 46 are respectively connected to the first end of the upper clamping strip 41 and the first end of the lower clamping strip 42 .

[0079] In some embodiments of the load resistor box, such as Figure 2 , Fig. 9 As shown, the load resistor box also includes a wiring board 5, on which are provided a plurality of wiring terminals 51 and a plurality of bridge blocks 52, and the wiring terminals 51 are connected to the load components 3. By providing the wiring terminals 51 and connecting the wiring terminals 51 through the bridge blocks 52, different load components 3 are connected in series or in parallel, thereby improving the connection convenience of the load components 3, and at the same time, different power combinations of resistance bands 32 can be connected, and the power configuration is diversified, so that the load resistor box is adapted to different power conditions.

[0080] The terminal block 51 includes three rows of terminal groups, namely, the first terminal group, the second terminal group and the third terminal group. The two ends of the resistor belt 32 in the load component 3 extend out of the box body 1 through the terminal block 5. Specifically, the first end of each resistor belt 32 extends from the left side of the top of the box body 1, and the second end of each resistor belt 32 extends from the right side of the top of the box body 1. The number of load components 3 is n. The first terminal group includes x first terminals 51, each first terminal 51 is arranged in a straight line on the left side of the terminal block 5, and each first terminal 51 is connected to the first end of the resistor belt 32 in the even-numbered load component 3. The second terminal group includes y second terminals 51, each second terminal 51 is arranged in a straight line on the left side of the terminal block 5, and each second terminal 51 is connected to the first end of the resistor belt 32 in the odd-numbered load component 3. The third terminal group includes y third terminals 51, each third terminal 51 is arranged in a straight line on the right side of the terminal block 5, and each third terminal 51 is connected to the second end of the resistor belt 32 in two load components 3 at the same time. For x, y and z, specifically, x+y=n, 2z=n.

[0081] In this embodiment, by providing a bridge block 52 between different wiring terminals 51, each load component 3 can be connected in series, in parallel or in combination. Fig.10 for Fig. 9 As shown in the circuit diagram, Fig.11 for Fig.10 The resistor circuit diagram shown is a simplified circuit diagram. Fig.10 , Fig.11The figure shows a resistor circuit diagram that is mainly connected in parallel. Of course, the resistors can also be adjusted to be connected in series. The circuit diagram is shown in Fig.12 shown.

[0082] In some embodiments of the ventilation assembly 2, such as Figure 2 , Figure 3 As shown, the ventilation component 2 includes a fan plate 21 and a plurality of fans 22. The fan plate 21 is provided at one end of the heat dissipation channel 11. The fan plate 21 has a plurality of ventilation holes, and the ventilation holes are provided in a one-to-one correspondence with the fans 22. The fans 22 are provided at the corresponding ventilation holes. By providing the fan plate 21, the heat dissipation channel 11 can be closed, and the air flow in the heat dissipation channel 11 can be guided to improve the ventilation efficiency of the heat dissipation channel 11. A plurality of fans 22 can be provided on the fan plate 21 to increase the ventilation volume of the heat dissipation channel 11 and improve the heat dissipation effect of the load component 3.

[0083] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A load resistance box, characterized in that: The load resistance box comprises a box body, a ventilation component and a load component; A heat dissipation channel is provided in the box; The ventilation component is arranged at the inlet or outlet of the heat dissipation channel; The load component is arranged in the heat dissipation channel, and the load component includes a frame and a resistance belt. The frame is arranged in the heat dissipation channel, and the resistance belt is wound on the frame. The cross section of the resistance belt has a bending portion or a folded portion at least partially.

2. The load resistance box according to claim 1, characterized in that: The skeleton comprises two bone bars, which are arranged at intervals on both sides of the heat dissipation channel, and the bone bars are provided with a plurality of through holes distributed along the length direction thereof; The resistance belt is passed through the through hole and arranged on the two bone strips, and the resistance belt is interlaced in a circuitous manner row by row.

3. The load resistance box according to claim 1, characterized in that: The skeleton comprises a plurality of bone bars, which are arranged side by side in the heat dissipation passage at intervals, and the bone bars are provided with a plurality of through holes distributed along the length direction thereof; The resistance belt is passed through the through hole and arranged on a plurality of the bone strips, and the resistance belt is interlaced in a circuitous manner row by row.

4. The load resistance box according to claim 2 or 3, characterized in that: The through hole is a flat long hole.

5. The load resistance box according to claim 4, characterized in that: The through hole penetrates to a side surface of the bone strip in the width direction.

6. The load resistance box according to any one of claims 2 or 3, characterized in that: The load resistor box further comprises a plurality of mounting bars, which are arranged on inner walls on both sides of the heat dissipation channel and extend along the length direction of the heat dissipation channel; There are multiple load components, and the multiple load components are arranged side by side in the heat dissipation channel along the length direction of the heat dissipation channel, and the end of the bone bar is arranged on the installation bar.

7. The load resistance box according to claim 6, characterized in that: The mounting bar is provided with a mounting groove extending along its length direction; The end of the bone strip is slidably arranged in the mounting groove corresponding to the mounting strip.

8. The load resistance box according to claim 6, characterized in that: The mounting strip comprises an upper strip, a lower strip and a limiting member, wherein the mounting groove is provided between the upper strip and the lower strip, the first end of the upper strip and the first end of the lower strip are fixedly connected, and the limiting member is detachably connected to the second end of the upper strip and the second end of the lower strip to close the channel for the bone strip to be installed into or slide out of the mounting groove.

9. The load resistance box according to claim 1, characterized in that: The load resistance box also includes a wiring board, on which a plurality of wiring terminals are arranged, and the wiring terminals are connected to the load components.

10. The load resistance box according to claim 1, characterized in that: The ventilation component comprises a fan plate and a plurality of fans, the fan plate is provided with a plurality of ventilation holes, the ventilation holes are arranged in a one-to-one correspondence with the fans, and the fans are arranged at the corresponding ventilation holes.

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