Junction box with heat dissipation function

Abstract

The invention provides a junction box with a heat dissipation function, and relates to the technical field of junction box equipment.The junction box comprises a box body, a plurality of wire inlet holes are formed in the bottom of the box body, isolation sleeves are arranged in the wire inlet holes, a heat dissipation assembly is arranged on the top of the box body, an air supply assembly is arranged on one side of the box body, and a box door is arranged on one side of the box body; the box door is hinged to the side wall of the box body, the box body is fixed to the wall of a production site, a cable extends into the box body through the wire inlet hole to be electrically connected with an electronic device placed in the box body, and the isolation sleeve fills a gap between the cable and the wire inlet hole to prevent moisture from entering the box body. The heat dissipation assembly exhausts hot air in the box body out of the box body to cool the interior of the box body, the air supply assembly supplies low-temperature air into the box body to take away heat generated when electronic devices in the box body work, and the box door hinged to the box body facilitates sealing and opening of the box body; and the maintenance work is further facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of junction box equipment, and in particular to a junction box with a heat dissipation function. Background Art

[0002] A junction box is a device used to connect electrical wires to electrical equipment. It usually includes one or more panels for connecting wires. These panels are usually labeled with color-coded labels to help identify the purpose of each connection. The design and material selection of junction boxes are critical to ensuring the reliability of power systems. They need to be able to withstand electrical loads and must have good fire and protection performance. In addition, the junction box needs to be easy to install and maintain so that problems can be quickly repaired if they occur.

[0003] The boiler coal mill motor winding temperature junction box is located at the coal mill motor body. The on-site working conditions are poor, with much dust and high ambient temperature. After years of operation and maintenance, the temperature cable is aged and damaged. Every time the coal mill motor is overhauled, the motor winding temperature is untied and wired. The junction box space is small, which is not conducive to maintenance work. Therefore, a junction box with heat dissipation function is needed to overcome the shortcomings in current practical applications. Summary of the invention

[0004] The invention provides a junction box with a heat dissipation function, which is used to solve the defects in the prior art.

[0005] The present invention provides a junction box with a heat dissipation function, comprising: a box body, a plurality of wire inlet holes are arranged at the bottom of the box body, isolation sleeves are arranged in the wire inlet holes, a heat dissipation component is arranged at the top of the box body, an air supply component is arranged at one side of the box body, a box door is arranged at one side of the box body, and the box door is hinged to the side wall of the box body.

[0006] Preferably, the heat dissipation assembly includes a heat dissipation frame, which is fixedly arranged on the top of the box body, and the top of the heat dissipation frame is provided with heat dissipation holes, the top inner wall of the heat dissipation frame is provided with a motor, and the output end of the motor is provided with a fan.

[0007] Preferably, the air supply assembly includes an air supply duct, an air supply duct is arranged on the side wall of the box body, one end of the air supply duct is connected to the box body, an air supply fan 1 is arranged at the other end of the air supply duct, and an air inlet of the air supply fan 1 is provided with a dust removal net, an air supply fan 2 is arranged on the outside of the box body, an air duct 1 is opened in the box body, the air duct 1 is connected to the air supply fan 2, an air duct 2 is opened in the heat dissipation rack, one end of the air supply duct 2 is connected to the heat dissipation rack, the other end of the air supply duct 2 is connected to the other end of the air duct 1, a moisture absorbing sheet is horizontally inserted on the air supply duct, and the exposed end of the moisture absorbing sheet is fixed to the outer wall of the air supply duct by bolts.

[0008] Preferably, the box body is also provided with multiple groups of fixing components for fixing electronic devices, and the fixing components include a fixing shell, a plurality of spur teeth are rotatably provided on the middle of the inner wall of the fixing shell, and a rotating arm is fixedly provided on the spur teeth at the middle position of the inner wall of the fixing shell, an upper limit rod and a lower limit rod are provided on the inner wall of the fixing shell, an upper horizontal plate is provided between the upper part of the plurality of spur teeth and the top of the fixing shell, the bottom of the upper horizontal plate and the top of the lower horizontal plate are respectively meshed with the plurality of spur teeth, an upper sliding groove is provided in the upper horizontal plate, the upper sliding groove is sleeved outside the upper limit rod, a lower horizontal plate is provided between the lower part of the plurality of spur teeth and the bottom of the fixing shell, a lower sliding groove is provided in the lower horizontal plate, and the lower sliding groove is sleeved in the lower limit rod, clamping rods are respectively provided on the tops of the upper horizontal plate and the lower horizontal plate, a moving groove is provided on the top of the fixing shell, the two clamping rods move in the moving groove, and an anti-slip pad is provided on the top of the clamping rod.

[0009] Preferably, a folding bin is provided on the inner wall of the box door, and the folding bin includes a bin plate, and the bin plate is fixedly provided on the inner wall of the box door, and a rotating shaft is rotatably provided at the bottom of the two bin plates, and a tool placing plate is fixed on the rotating shaft, and a clamping arc is provided on the top of the tool placing plate, and a clamping groove is provided on the inner wall of the box door, and the clamping arc is clamped in the clamping groove, a support rod is hinged on the outer side of the bin plate, and a support ball is provided at the bottom of the support rod, and a ball groove for placing the support ball is opened on the box door below the folding bin.

[0010] Preferably, the air volume detection module is used to measure the air volume of the air blower 1;

[0011] Temperature measurement module 1, used to measure the air inlet temperature of the air supply duct;

[0012] Temperature measurement module 2, used to measure the air outlet temperature at the heat dissipation hole;

[0013] Temperature measurement module three, used to measure the temperature of the air at the air outlet of the second blower;

[0014] Temperature measurement module 4 is used to measure the temperature of the air at the outlet of air duct 2;

[0015] Density measurement module 1, used to measure the wind density at the air outlet of blower 2;

[0016] Density measurement module 2 is used to measure the wind density at the temperature of the wind at the outlet of the second wind duct;

[0017] An alarm module, used for issuing an alarm;

[0018] A calculation module 1 is used to calculate the total heat generated by the electronic devices in the junction box based on the total number of electronic devices, the rated power consumption of each electronic device, and the load factor corresponding to each electronic device;

[0019] Calculation module 2, used to calculate the heat dissipation of the junction box based on the heat transfer coefficient data;

[0020] Calculation module three, for calculating the instantaneous wind speed required for opening of fan 2 based on the constant-pressure specific heat capacity at the air outlet of fan 2, the constant-pressure specific heat capacity at the air outlet of duct 2, the wind density at the temperature at the air outlet of fan 2, the wind density at the temperature at the air outlet of duct 2, the temperature of the wind at the air outlet of fan 2, the temperature of the wind at the air outlet of duct 2, and the temperature exchange coefficient between the junction box and the air;

[0021] A processing module, used for comparing the result obtained by the second calculation module with the result obtained by the first calculation module;

[0022] The control module, when the heat dissipation of the junction box is greater than or equal to the total heat generated by the electronic components in the junction box, only turns on the blower 1 for heat dissipation; when the heat dissipation of the junction box is less than the total heat generated by the electronic components in the junction box, turns on the maximum power of the blower 1 and the blower 2 for heat dissipation, and adjusts the wind speed of the blower 2; when the air outlet temperature at the heat dissipation hole is greater than the preset maximum temperature value in the junction box, the alarm module sounds an alarm.

[0023] Preferably, the calculation module 1 calculates based on the following formula 1:

[0024]

[0025] Q0 is the total heat generated by the electronic components in the junction box, M is the total number of electronic components, P i is the rated power consumption of the ith electronic device, L i is the load factor corresponding to the i-th electronic device;

[0026] The calculation module 2 is calculated based on the following formula 2:

[0027]

[0028] Q1 is the heat dissipation of the junction box, n is the heat transfer coefficient, γ is the thermal conductivity of air, G is the air supply volume of the blower, A is the air flow cross-sectional area of ​​the air supply pipe, d is the diameter of the air supply pipe, v is the kinematic viscosity of air, F is the outer shell area of ​​the electronic components in the junction box, ω is the wind speed in the air supply pipe, T1 is the air inlet temperature of the air supply pipe, T2 is the air outlet temperature at the heat dissipation hole, and T3 is the ambient temperature outside the junction box in the factory area;

[0029] The calculation module 3 is calculated based on the following formula 3:

[0030]

[0031] q is the instantaneous wind speed required for fan 2 to open, C f is the constant pressure specific heat capacity at the second air outlet of the blower, C θ Specific heat capacity at constant pressure at the second outlet of the duct, ρ f is the wind density at the second outlet of the blower at the temperature, ρ θ is the wind density at the temperature of the second outlet of the duct, T f is the temperature of the air at the second air outlet of the blower, T θ is the temperature of the wind at the second outlet of the duct, and f is the temperature exchange coefficient between the junction box and the air;

[0032] When Q1≥Q0, only blower 1 is turned on for heat dissipation;

[0033] When Q1<Q0, turn on the maximum power of fan 1 and fan 2 for heat dissipation, and adjust the wind speed of fan 2 to q;

[0034] When T2>T, the alarm module sounds an alarm;

[0035] T is the preset maximum temperature value in the junction box. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 is a schematic diagram of the overall cross-sectional structure provided by an embodiment of the present invention;

[0038] Figure 2 yes Figure 1 The structural diagram of part A in the figure;

[0039] Figure 3 It is a partial structural schematic diagram provided by an embodiment of the present invention;

[0040] Figure 4 It is a schematic diagram of the structure of a box door provided by an embodiment of the present invention.

[0041] Reference numerals:

[0042] 1. Box body; 2. Wire inlet hole; 3. Isolation sleeve; 4. Heat dissipation assembly; 41. Heat dissipation frame; 42. Heat dissipation hole; 43. Motor; 44. Fan; 5. Air supply assembly; 51. Air supply duct; 52. Air supply fan 1; 53. Air duct 1; 54. Air duct 2; 55. Moisture absorption sheet; 56. Dust removal net; 57. Air supply fan 2; 6. Fixed assembly; 61. Fixed shell; 62. Straight teeth; 63. Rotating arm; 64. Upper limit rod; 65. Lower limit rod; 66. Upper horizontal plate; 67. Lower horizontal plate; 68. Upper sliding groove; 69. Lower sliding groove; 70. Clamp rod; 71. Anti-skid pad; 72. Moving groove; 8. Box door; 9. Folding bin; 91. Bin board; 92. Rotating shaft; 93. Card arc; 94. Card slot; 95. Tool plate; 96. Support stick; 97. Support ball; 98. Ball slot. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0045] The present invention provides the following embodiments

[0046] Example 1

[0047] The embodiment of the present invention provides a junction box with heat dissipation function, such as Figure 1 As shown, it includes: a box body 1, a plurality of wire inlet holes 2 are arranged at the bottom of the box body 1, an isolation sleeve 3 is arranged in the wire inlet hole 2, a heat dissipation component 4 is arranged on the top of the box body 1, an air supply component 5 is arranged on one side of the box body 1, and a box door 8 is arranged on one side of the box body 1, and the box door 8 is hinged to the side wall of the box body 1.

[0048] The working principle and beneficial effects of the above technical solution are as follows: the box 1 is fixed on the wall of the production site, the cable is extended into the box 1 through the wire inlet hole 2 to be electrically connected to the electronic devices placed in the box 1, the isolation sleeve 3 fills the gap between the cable and the wire inlet hole 2 to prevent moisture from entering the box 1, and prevents the cable from being damaged by long-term friction between the cable and the wire inlet hole 2, the heat dissipation component 4 discharges the hot air in the box 1 to the outside of the box 1 to cool the box 1, the air supply component 5 sends low-temperature air into the box 1 to take away the heat generated by the electronic devices in the box 1 when working, and the box door 8 hingedly arranged on the box 1 facilitates the sealing and opening of the box 1, which is further conducive to maintenance work.

[0049] Example 2

[0050] On the basis of Example 1, Figure 1 As shown, the heat dissipation assembly 4 includes a heat dissipation frame 41, which is fixedly arranged on the top of the box body 1. The top of the heat dissipation frame 41 is provided with a heat dissipation hole 42. The top inner wall of the heat dissipation frame 41 is provided with a motor 43, and the output end of the motor 43 is provided with a fan 44.

[0051] The working principle and beneficial effects of the above technical solution are as follows: the box 1 supports and connects the heat sink 41, and the heat generated by the electronic components in the box 1 during operation is discharged to the outside through the heat dissipation holes 42 on the heat sink 41, which facilitates the reduction of the temperature in the box 1. The motor 43 drives the fan 44, and when the fan 44 rotates, it has a suction effect on the heat in the box 1, thereby accelerating the discharge of heat in the box 1.

[0052] Example 3

[0053] On the basis of Example 2, Figure 1 , Figure 3 As shown, the air supply component 5 includes an air supply pipe 51, and the air supply pipe 51 is arranged on the side wall of the box body 1, one end of the air supply pipe 51 is connected with the inside of the box body 1, and the other end of the air supply pipe 51 is arranged with a blower 52, and the air inlet of the blower 52 is arranged with a dust removal net 56, and the outside of the box body 1 is arranged with a blower 57, and the box body 1 is provided with an air duct 1 53, and the air duct 1 53 is connected with the blower 2 57, and the heat dissipation frame 41 is provided with an air duct 2 54, one end of the air supply pipe 512 is connected with the inside of the heat dissipation frame 41, and the other end of the air supply pipe 512 is connected with the other end of the air duct 1 53, and a moisture absorbing sheet 55 is horizontally inserted on the air supply pipe 51, and the exposed end of the moisture absorbing sheet 55 is fixed to the outer wall of the air supply pipe 51 by bolts.

[0054] The working principle and beneficial effects of the above technical scheme are as follows: blower 1 52 blows cold air with low temperature into the box body 1 through the air supply pipe 51, and the cold air entering the blower 1 52 will be filtered by the dust removal net 56 at the air inlet of the blower 1 52 to prevent dust from entering the box body 1 and causing damage to the electronic devices. Blower 2 57 sends external cold air into the inner wall of the box body 1 through air duct 1 53 and air duct 2 54, and cools the inner wall of the box body 1 for a second time by allowing the inner wall of the box body 1 to absorb the heat in the box body 1. The damp sheet absorbs moisture from the cold air in the air supply pipe 51 to prevent moisture from entering the box body 1. When the heat dissipation capacity of blower 1 52 is not enough to remove the heat in the box body 1, turn on blower 2 57 to enhance the heat dissipation capacity of the box body 1.

[0055] Example 4

[0056] On the basis of Example 3, Figure 2 As shown, the box body 1 is further provided with a plurality of fixing components 6 for fixing electronic devices, the fixing components 6 comprising a fixing shell 61, a plurality of spur teeth 62 are rotatably provided on the middle of the inner wall of the fixing shell 61, a rotating arm 63 is fixedly provided on the spur teeth 62 at the middle position of the inner wall of the fixing shell 61, an upper limit rod 64 and a lower limit rod 65 are provided on the inner wall of the fixing shell 61, an upper horizontal plate 66 is provided between the upper part of the plurality of spur teeth 62 and the top of the fixing shell 61, the bottom of the upper horizontal plate 66 and the top of the lower horizontal plate 67 are respectively meshed with the plurality of spur teeth 62, An upper sliding groove 68 is provided in the upper horizontal plate 66, and the upper sliding groove 68 is sleeved on the outside of the upper limit rod 64. A lower horizontal plate 67 is provided between the lower part of the plurality of straight teeth 62 and the bottom of the fixed shell 61. A lower sliding groove 69 is provided in the lower horizontal plate 67, and the lower sliding groove 69 is sleeved in the lower limit rod 65. Clamping rods 70 are respectively provided on the top of the upper horizontal plate 66 and the lower horizontal plate 67. A moving groove 72 is provided on the top of the fixed shell 61. The two clamping rods 70 move in the moving groove 72, and an anti-slip pad 71 is provided on the top of the clamping rod 70.

[0057] The working principle and beneficial effects of the above technical solution are as follows: the fixing assembly 6 fixes the electronic device in the box body 1 to keep the electronic device working stably in the box body 1; the top of the fixing shell 61 and the plurality of straight teeth 62 limit the vertical direction of the upper horizontal plate 66 to ensure that the upper horizontal plate 66 moves horizontally; the bottom of the fixing shell 61 and the plurality of straight teeth 62 limit the vertical direction of the lower horizontal plate 66 to ensure that the lower horizontal plate 67 moves horizontally; the upper limit rod 64 and the lower limit rod 65 are respectively connected through the upper sliding groove 68 and The lower sliding groove 69 guides the upper horizontal plate 66 and the lower horizontal plate 67 horizontally, and the spur teeth 62 in the middle position are rotated by twisting the rotating arm 63. The rotation of the spur teeth 62 in the middle position drives the upper horizontal plate 66 and the lower horizontal plate 67 to move in opposite directions through the engagement with the upper horizontal plate 66 and the lower horizontal plate 67. When moving, the upper horizontal plate 66 and the lower horizontal plate 67 respectively drive the two clamping rods 70 to move, thereby fixing and releasing the electronic components, which facilitates the installation and removal of the electronic components in the box 1.

[0058] Example 5

[0059] On the basis of Example 4, Figure 4 As shown, a folding bin 9 is provided on the inner wall of the box door 8, and the folding bin 9 includes a bin plate 91, and the bin plate 91 is fixedly provided on the inner wall of the box door 8. A rotating shaft 92 is rotatably provided at the bottom of the two bin plates 91, and a placing plate 95 is fixed on the rotating shaft 92. A clamping arc 93 is provided on the top of the placing plate 95, and a clamping groove 94 is provided on the inner wall of the box door 8. The clamping arc 93 is clamped in the clamping groove 94, and a support rod 96 is hinged on the outer side of the bin plate 91. A support ball 97 is provided at the bottom of the support rod 96, and a ball groove 98 for placing the support ball 97 is opened on the box door 8 below the folding bin 9.

[0060] The working principle and beneficial effects of the above technical solution are as follows: rotate the tool placement plate 95 to a horizontal state, rotate the support rod 96, and place the support ball 97 at the bottom of the support rod 96 into the ball groove 98, so that the tool placement plate 95 is placed horizontally and stably. When the tool placement plate 95 is rotated upward and placed vertically, and the arc 93 on the tool placement plate 95 is clamped in the clamping groove 94, the space between the tool placement plate 95 and the two side warehouse plates 91 can be used to place maintenance tools. The foldable warehouse 9 can be laid flat and folded up by being hinged with the box door 8. Folding it is convenient to store the maintenance tools. Laying it flat is convenient to place the maintenance tools in the maintenance room, which facilitates maintenance.

[0061] Example 6

[0062] Based on Example 5,

[0063] An air volume detection module is used to measure the air volume of the air supply fan 52;

[0064] Temperature measurement module 1, used to measure the air inlet temperature of the air supply pipe 51;

[0065] Temperature measurement module 2, used to measure the air outlet temperature at the heat dissipation hole 42;

[0066] Temperature measurement module three, used to measure the temperature of the wind at the air outlet of air blower two 57;

[0067] Temperature measurement module 4, used to measure the temperature of the wind at the outlet of air duct 2 54;

[0068] Density measurement module 1, used to measure the wind density at the air outlet of air blower 2 57;

[0069] Density measurement module 2, used to measure the wind density at the outlet temperature of wind duct 2 54;

[0070] An alarm module, used for issuing an alarm;

[0071] A calculation module 1 is used to calculate the total heat generated by the electronic devices in the junction box based on the total number of electronic devices, the rated power consumption of each electronic device, and the load factor corresponding to each electronic device;

[0072] Calculation module 2, used to calculate the heat dissipation of the junction box based on the heat transfer coefficient data;

[0073] Calculation module three, for calculating the instantaneous wind speed required for opening of fan 2 based on the constant pressure specific heat capacity at the air outlet of fan 2 57, the constant pressure specific heat capacity at the air outlet of duct 2 54, the wind density at the temperature at the air outlet of fan 2 57, the wind density at the temperature at the air outlet of duct 2 54, the temperature of the wind at the air outlet of fan 2 57, the temperature of the wind at the air outlet of duct 2 54, and the temperature exchange coefficient between the junction box and the air;

[0074] A processing module, used for comparing the result obtained by the second calculation module with the result obtained by the first calculation module;

[0075] The control module, when the heat dissipation of the junction box is greater than or equal to the total heat generated by the electronic components in the junction box, only turns on the blower 1 52 for heat dissipation; when the heat dissipation of the junction box is less than the total heat generated by the electronic components in the junction box, turns on the maximum power of the blower 1 52 and the blower 2 57 for heat dissipation, and adjusts the wind speed of the blower 2 57; when the air outlet temperature at the heat dissipation hole 42 is greater than the preset maximum temperature value in the junction box, the alarm module sounds an alarm.

[0076] The working principle and beneficial effects of the above technical solution are as follows: the air volume detection module measures the air volume of the blower 52, the temperature measurement module 1 measures the air inlet temperature of the air supply pipe 51, the temperature measurement module 2 measures the air outlet temperature at the heat dissipation hole 42, the temperature measurement module 3 measures the temperature of the wind at the air outlet of the blower 57, the temperature measurement module 4 measures the temperature of the wind at the outlet of the air duct 54, the density measurement module 1 measures the wind density at the outlet of the blower 57, the density measurement module 2 measures the wind density at the outlet of the air duct 54, the alarm module is used to issue an alarm, the calculation module 1 calculates the total heat generated by the electronic devices in the junction box based on the total number of electronic devices, the rated power consumption of each electronic device, and the load factor corresponding to each electronic device, the calculation module 2 calculates the heat dissipation of the junction box based on data such as the heat transfer coefficient, and the calculation module 3 calculates the heat dissipation of the junction box based on the constant pressure specific heat at the outlet of the blower 57 The instantaneous wind speed required for the opening of the second fan is calculated based on the constant pressure specific heat capacity at the outlet of the second air duct 54, the wind density at the temperature of the second air duct 54 outlet, the wind density at the temperature of the second air duct 54 outlet, the temperature of the wind at the outlet of the second air duct 57, the temperature of the wind at the outlet of the second air duct 54, and the temperature exchange coefficient between the junction box and the air. The processing module compares the result obtained by the calculation module 2 with the result obtained by the distance calculation module 1. The control module only turns on the first air blower 52 for heat dissipation when the heat dissipation of the junction box is greater than or equal to the total heat generated by the electronic components in the junction box according to the calculation result of the processing module; when the heat dissipation of the junction box is less than the total heat generated by the electronic components in the junction box, the maximum power of the first air blower 52 and the second air blower 57 are turned on for heat dissipation, and the wind speed of the second air blower 57 is adjusted; when the air outlet temperature at the heat dissipation hole 42 is greater than the preset maximum temperature value in the junction box, the alarm module sounds an alarm.

[0077] Example 7

[0078] Based on Example 6,

[0079] The calculation module 1 calculates based on the following formula 1:

[0080]

[0081] Q0 is the total heat generated by the electronic components in the junction box, M is the total number of electronic components, P i is the rated power consumption of the ith electronic device, L i is the load factor corresponding to the i-th electronic device;

[0082] The calculation module 2 is calculated based on the following formula 2:

[0083]

[0084] Q1 is the heat dissipation of the junction box, n is the heat transfer coefficient, γ is the thermal conductivity of air, G is the air supply volume of the blower, A is the air flow cross-sectional area of ​​the air supply pipe, d is the diameter of the air supply pipe, v is the kinematic viscosity of air, F is the outer shell area of ​​the electronic components in the junction box, ω is the wind speed in the air supply pipe, T1 is the air inlet temperature of the air supply pipe, T2 is the air outlet temperature at the heat dissipation hole, and T3 is the ambient temperature outside the junction box in the factory area;

[0085] The calculation module 3 is calculated based on the following formula 3:

[0086]

[0087] q is the instantaneous wind speed required for fan 2 to open, C f is the constant pressure specific heat capacity at the second air outlet of the blower, C θ Specific heat capacity at constant pressure at the second outlet of the duct, ρ f is the wind density at the second outlet of the blower at the temperature, ρ θ is the wind density at the temperature of the second outlet of the duct, T f is the temperature of the air at the second air outlet of the blower, T θ is the temperature of the wind at the second outlet of the duct, and f is the temperature exchange coefficient between the junction box and the air;

[0088] When Q1≥Q0, only blower 1 is turned on for heat dissipation;

[0089] When Q1<Q0, turn on the maximum power of fan 1 and fan 2 for heat dissipation, and adjust the wind speed of fan 2 to q;

[0090] When T2>T, the alarm module sounds an alarm;

[0091] T is the preset maximum temperature value in the junction box.

[0092] The working principle and beneficial effects of the above technical solution are: Calculate the total heat generated by all electronic components in the junction box by Calculate the heat dissipation of the junction box. When Q1≥Q0, only turn on fan 1 for heat dissipation. When Q1<Q0, turn on fan 1 at maximum power and fan 2 for heat dissipation. The instantaneous wind speed required for fan 2 to be opened is calculated. When T2>T, the alarm module sounds an alarm, and T is the preset maximum temperature value in the junction box.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A junction box with heat dissipation function, characterized in that: include: A box body (1), wherein a plurality of wire inlet holes (2) are arranged at the bottom of the box body (1), an isolation sleeve (3) is arranged in the wire inlet hole (2), a heat dissipation assembly (4) is arranged at the top of the box body (1), an air supply assembly (5) is arranged at one side of the box body (1), and a box door (8) is arranged at one side of the box body (1), and the box door (8) is hinged to the side wall of the box body (1).

2. A junction box with heat dissipation function according to claim 1, characterized in that: The heat dissipation assembly (4) comprises a heat dissipation frame (41), the heat dissipation frame (41) is fixedly arranged on the top of the box body (1), the top of the heat dissipation frame (41) is provided with a heat dissipation hole (42), the top inner wall of the heat dissipation frame (41) is provided with a motor (43), and the output end of the motor (43) is provided with a fan (44).

3. A junction box with heat dissipation function according to claim 2, characterized in that: The air supply assembly (5) comprises an air supply pipe (51), the side wall of the housing (1) is provided with an air supply pipe (51), one end of the air supply pipe (51) is connected to the interior of the housing (1), the other end of the air supply pipe (51) is provided with an air blower (52), the air inlet of the air blower (52) is provided with a dust removal net (56), the outer side of the housing (1) is provided with an air supply fan (57), the housing (1) is provided with an air duct (53), and the The air duct one (53) is connected to the air supply fan two (57), the heat dissipation frame (41) is provided with an air duct two (54), one end of the air supply duct two (51) is connected to the heat dissipation frame (41), and the other end of the air supply duct two (51) is connected to the other end of the air duct one (53) and connected to each other, and a moisture absorption sheet (55) is horizontally inserted on the air supply duct (51), and the exposed end of the moisture absorption sheet (55) is fixed to the outer wall of the air supply duct (51) by bolts.

4. A junction box with heat dissipation function according to claim 3, characterized in that: The box body (1) is also provided with a plurality of fixing components (6) for fixing electronic devices. The fixing components (6) include a fixing shell (61). A plurality of spur teeth (62) are rotatably provided on the middle of the inner wall of the fixing shell (61). A rotating arm (63) is fixedly provided on the spur teeth (62) at the middle position of the inner wall of the fixing shell (61). An upper limit rod (64) and a lower limit rod (65) are provided on the inner wall of the fixing shell (61). An upper horizontal plate (66) is provided between the upper part of the plurality of spur teeth (62) and the top of the fixing shell (61). The bottom of the upper horizontal plate (66) and the top of the lower horizontal plate (67) are respectively meshed with the plurality of spur teeth (62). An upper sliding groove (68) is provided in the plate (66), and the upper sliding groove (68) is sleeved outside the upper limit rod (64). A lower horizontal plate (67) is provided between the lower part of the plurality of straight teeth (62) and the bottom of the fixed shell (61). A lower sliding groove (69) is provided in the lower horizontal plate (67), and the lower sliding groove (69) is sleeved in the lower limit rod (65). Clamping rods (70) are respectively provided on the top of the upper horizontal plate (66) and the lower horizontal plate (67). A movable groove (72) is provided on the top of the fixed shell (61), and the two clamping rods (70) move in the movable groove (72). An anti-slip pad (71) is provided on the top of the clamping rod (70).

5. A junction box with heat dissipation function according to claim 4, characterized in that: A folding bin (9) is arranged on the inner wall of the box door (8), and the folding bin (9) comprises a bin plate (91), and the bin plate (91) is fixedly arranged on the inner wall of the box door (8). A rotating shaft (92) is rotatably arranged at the bottom of the two bin plates (91), and a tool placing plate (95) is fixed on the rotating shaft (92). A clamping arc (93) is arranged on the top of the tool placing plate (95). A clamping groove (94) is arranged on the inner wall of the box door (8), and the clamping arc (93) is clamped in the clamping groove (94). A supporting rod (96) is hinged on the outer side of the bin plate (91), and a supporting ball (97) is arranged at the bottom of the supporting rod (96). A ball groove (98) for placing the supporting ball (97) is opened on the box door (8) below the folding bin (9).

6. A junction box with heat dissipation function according to claim 5, characterized in that: Also includes: An air volume detection module, used to measure the air volume of the air supply fan 1 (52); Temperature measurement module 1, used to measure the air inlet temperature of the air supply pipe (51); Temperature measurement module 2, used to measure the air outlet temperature at the heat dissipation hole (42); Temperature measurement module 3, used to measure the temperature of the air at the air outlet of air blower 2 (57); Temperature measurement module 4, used to measure the temperature of the air at the outlet of air duct 2 (54); Density measurement module 1, used to measure the wind density at the air outlet of air blower 2 (57); Density measurement module 2, used to measure the wind density at the outlet temperature of wind duct 2 (54); An alarm module, used for issuing an alarm; A calculation module 1 is used to calculate the total heat generated by the electronic devices in the junction box based on the total number of electronic devices, the rated power consumption of each electronic device, and the load factor corresponding to each electronic device; Calculation module 2, used to calculate the heat dissipation of the junction box based on the heat transfer coefficient data; A calculation module three is used to calculate the instantaneous wind speed required for opening the second fan based on the constant pressure specific heat capacity at the outlet of the second fan (57), the constant pressure specific heat capacity at the outlet of the second air duct (54), the wind density at the temperature at the outlet of the second fan (57), the wind density at the temperature at the outlet of the second air duct (54), the temperature of the wind at the outlet of the second fan (57), the temperature of the wind at the outlet of the second air duct (54), and the temperature exchange coefficient between the junction box and the air; A processing module, used for comparing the result obtained by the second calculation module with the result obtained by the first calculation module; The control module, when the heat dissipation of the junction box is greater than or equal to the total heat generated by the electronic components in the junction box, only turns on the blower 1 (52) for heat dissipation; when the heat dissipation of the junction box is less than the total heat generated by the electronic components in the junction box, turns on the maximum power of the blower 1 (52) and the blower 2 (57) for heat dissipation, and adjusts the wind speed of the blower 2 (57); when the air outlet temperature at the heat dissipation hole (42) is greater than the preset maximum temperature value in the junction box, the alarm module sounds an alarm.

7. The junction box with heat dissipation function according to claim 6, characterized in that: The calculation module 1 calculates based on the following formula 1: Q0 is the total heat generated by the electronic components in the junction box, M is the total number of electronic components, P i is the rated power consumption of the ith electronic device, L i is the load factor corresponding to the i-th electronic device; The calculation module 2 is calculated based on the following formula 2: Q1 is the heat dissipation of the junction box, a is the heat transfer characteristic coefficient of the electronic components in the junction box, n is the heat transfer coefficient, γ is the thermal conductivity of air, G is the air supply volume of the blower, A is the air flow cross-sectional area of ​​the air supply pipe, d is the diameter of the air supply pipe, v is the kinematic viscosity of air, F is the outer shell area of ​​the electronic components in the junction box, ω is the wind speed in the air supply pipe, T2 is the air inlet temperature of the air supply pipe, T2 is the air outlet temperature at the heat dissipation hole, and T3 is the ambient temperature outside the junction box in the factory area; The calculation module 3 is calculated based on the following formula 3: q is the instantaneous wind speed required for fan 2 to open, C f is the constant pressure specific heat capacity at the second air outlet of the blower, C θ Specific heat capacity at constant pressure at the second outlet of the duct, ρ f is the wind density at the second outlet of the blower at the temperature, ρ θ is the wind density at the temperature of the second outlet of the duct, T f is the temperature of the air at the second air outlet of the blower, T θ is the temperature of the wind at the second outlet of the duct, and f is the temperature exchange coefficient between the junction box and the air; When Q1≥Q0, only blower 1 is turned on for heat dissipation; When Q1<Q0, turn on the maximum power of fan 1 and fan 2 for heat dissipation, and adjust the wind speed of fan 2 to q; When T2>T, the alarm module sounds an alarm; T is the preset maximum temperature value in the junction box.

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