A kind of air cooling system for power distribution cabinet

Abstract

The invention discloses an air cooling system for a power distribution cabinet, and relates to the field of air cooling, comprising a negative pressure fan, wherein the air inlet end of the negative pressure fan is connected with an air duct; a bellows is arranged between a back plate of the power distribution cabinet and electrical components, and the bellows is connected to the air duct through a pipe connector; a folding panel is composed of a plurality of vertically arranged V-shaped hinged plates, the V-shaped hinged plates are hinged, the hinged parts of the V-shaped hinged plates are recessed toward the inside of the bellows, and the hinged parts between the V-shaped hinged plates are protruding toward the outside of the bellows, so that the folding panel forms a continuous hinged folding device, air outlets are provided on both rotating surfaces of the V-shaped hinged plates, the top of the folding panel is rotatably connected to the bellows, and a spring is connected between the two rotating surfaces of the V-shaped hinged plates, so that the folding panel as a whole has a tendency to be folded; the invention arranges the folding panel between the back plate of the power distribution cabinet and the electrical components, and the convective air must pass through the electrical components before being discharged from the evenly distributed air outlets, so as to achieve targeted and efficient ventilation and heat dissipation of the electrical components.

Description

Technical Field

[0001] The invention relates to the field of air cooling, and in particular to an air cooling system for a power distribution cabinet. Background Art

[0002] Air cooling is a common heat dissipation and cooling method for distribution cabinets. By quickly conducting the air in the distribution cabinet, the heat emitted by the electrical components inside the distribution cabinet can be quickly taken away, keeping the electrical components working normally at an appropriate temperature.

[0003] The air cooling of traditional distribution cabinets is completed by cooling fans. Convection fans are fixedly set on the surface of the distribution cabinet to realize air replacement in the cabinet, and the electrical components in the distribution cabinet are concentrated on the surface of the mounting bracket close to the back panel, so that the heat is concentrated on the back panel of the distribution cabinet. The setting position of traditional cooling fans is fixed, so the air convection path is fixed, the effective heat dissipation space is limited, and it is impossible to effectively dissipate heat and cool down the heat accumulation area quickly. Summary of the invention

[0004] The object of the present invention is to provide an air cooling system for a power distribution cabinet, which is used to solve the problems of slow cooling efficiency and weak cooling targeting caused by the fixed position and small heat dissipation coverage space of traditional cooling fans.

[0005] In order to solve the problems existing in the prior art, the technical solution of the present invention is as follows:

[0006] An air cooling system for a power distribution cabinet comprises a negative pressure fan, wherein an air inlet end of the negative pressure fan is connected to an air duct;

[0007] A bellows, which is arranged between the back plate of the power distribution cabinet and the electrical components, and is connected to the air duct via a pipe connector;

[0008] The folding panel is composed of a plurality of vertically arranged V-shaped hinged plates, which are hinged with each other. The hinged parts of the V-shaped hinged plates are recessed into the bellows, and the hinged parts between the V-shaped hinged plates are protruding out of the bellows, so that the folding panel forms a continuous hinged folding device. Air vents are provided on both rotating surfaces of the V-shaped hinged plates. The top of the folding panel is rotatably connected to the bellows. A spring is connected between the two rotating surfaces of the V-shaped hinged plates, so that the folding panel as a whole has a tendency to be folded;

[0009] A stretching component is used to intermittently pull down the lower end of the folding panel so that the folding door panel can be intermittently folded and unfolded;

[0010] The air inlet assembly is arranged on the surface of the distribution cabinet door. The airflow driven by the negative pressure fan enters the distribution cabinet through the air inlet assembly and is then discharged through the air outlet, the bellows and the air duct in sequence.

[0011] Preferably, the stretching assembly includes a motor, the lower end of the folding panel is rotatably connected to a base frame, the base frame slides vertically in the bellows, a cam is fixed to the output shaft of the motor, the cam is pressed on the surface of the base frame, vertical grooves are opened on both sides of the bellows, and the hinge shaft ends of adjacent V-shaped hinged plates move vertically along the vertical grooves.

[0012] Preferably, a guide plate is provided at the edge of the air outlet, and the guide plate is inclined in the opposite direction to the hinged part of the V-shaped hinged plate.

[0013] Preferably, the air inlet assembly includes an expansion cavity that passes through the door of the power distribution cabinet, a fan is arranged at the inner opening of the expansion cavity, and a filter plate is arranged at the outer opening of the expansion cavity.

[0014] Preferably, a swing frame is rotatably arranged outside the expansion cavity, the edge of the swing frame is sealed to the expansion cavity by an elastic layer, a spring is arranged between the swing frame and the door of the power distribution cabinet to tilt the free end of the swing frame outward, the filter plate is arranged on the surface of the swing frame, a first push switch is arranged in the expansion cavity, the first push switch is electrically connected to an indicator light, and the free end of the swing frame swings toward the expansion cavity to touch the first push switch.

[0015] Preferably, a gate opening penetrating the expansion cavity is opened on the surface of the distribution cabinet door, a cover plate is installed inside the expansion cavity by elastic rotation of a torsion spring, the cover plate is used to block the gate opening, and the first push switch is installed at the free end of the cover plate.

[0016] Preferably, the pipe connector includes a bellows, the surface of the air duct has a branch port, the bellows is connected to the branch port, the end of the bellows has a plug, the top of the bellows is provided with a sleeve, and the sleeve and the plug are adapted to be plugged in.

[0017] Preferably, the lower sealing plate and the upper sealing plate are elastically rotated and installed inside the sleeve and the insert tube through a torsion spring, a stop rod is provided at the end of the sleeve, and a clearance groove is provided at the edge of the insert tube. The insert tube is inserted into the sleeve to abut against the lower sealing plate to open the sleeve, and the stop rod moves along the clearance groove to abut against the upper sealing plate to open the insert tube.

[0018] Preferably, two negative pressure fans are provided, and the two negative pressure fans are connected in series with the air duct in sequence to jointly extract the gas in the bellows, and a pressure sensing component is provided on the surface of the air duct between the negative pressure fan and the pipe connector.

[0019] Preferably, the pressure-sensing component includes an external through tube, which passes through the air duct, and a valve plate is provided in the external through tube through a spring elastic sliding adapter, an expansion groove is provided on the inner wall of the external through tube, and the touch portion of the second push switch is inserted into the expansion groove, and a pressure handle is rotatably provided in the expansion groove, and the valve plate squeezes the pressure handle to rotate and press the second push switch, and the second push switch is connected to the negative pressure fan through a controller.

[0020] Compared with the related art, the present invention has the following beneficial effects:

[0021] 1. The present invention arranges the folding panel between the back plate of the distribution cabinet and the electrical components. The convective air must pass through the electrical components and then be discharged from the evenly distributed air outlets, so as to achieve targeted and efficient ventilation and heat dissipation of the electrical components. In addition, during the heat dissipation process, the folding panel keeps intermittent folding and unfolding dynamically, so that the position and angle of the air intake air outlet change dynamically, the convection distribution area changes dynamically, the airflow can fully cover the heat generation area where the electrical components are located, thereby improving the uniform heat dissipation effect and avoiding the problem of insufficient heat dissipation caused by the existence of convection dead corners.

[0022] 2. The present invention adopts an elastically rotatably mounted swing frame to load the filter plate, and the permeability effect of the filter plate is fed back through negative pressure changes. When the permeability of the filter plate is reduced to a certain level, the swing frame swings toward the cabinet door due to the negative pressure and touches the first push switch, turning on the indicator light, promptly notifying the staff of abnormal air intake, thereby facilitating timely cleaning and maintenance of the filter plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2 This is a schematic diagram of the distribution of the bellows of the present invention in the power distribution cabinet.

[0025] Figure 3 This is a schematic diagram of the folding panel of the present invention being assembled on the surface of a bellows.

[0026] Figure 4 It is a schematic diagram of the folding panel structure of the present invention.

[0027] Figure 5 This is one of the structural schematic diagrams of the air inlet assembly of the present invention.

[0028] Figure 6 This is the second structural schematic diagram of the air inlet assembly of the present invention.

[0029] Figure 7 This is the third structural schematic diagram of the air inlet assembly of the present invention.

[0030] Figure 8 This is one of the schematic diagrams of the pipeline connector structure of the present invention.

[0031] Fig. 9 This is the second schematic diagram of the pipeline connector structure of the present invention.

[0032] Fig.10 It is a schematic diagram of the structure of the pressure sensing component of the present invention.

[0033] Figure numerals: 1. negative pressure fan; 2. air duct; 3. pipe connector; 31. branch port; 32. bellows; 33. intubation tube; 34. upper sealing plate; 35. sleeve; 36. lower sealing plate; 37. stop rod; 38. give way groove; 4. pressure sensing component; 41. external through pipe; 42. valve plate; 43. expansion groove; 44. pressure handle; 45. second push switch; 5. bellows; 6. air inlet component; 61. expansion chamber; 62. swing frame; 63. filter plate; 64. indicator light; 65. fan; 66. grille; 67. cover plate; 68. first push switch; 7. folding panel; 71. V-shaped hinged plate; 72. air outlet; 73. guide plate; 74. vertical groove; 8. motor; 81. cam; 82. base frame. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0035] like Figure 1 , Figure 2 As shown, the air cooling system of the power distribution cabinet comprises a negative pressure fan 1, which is arranged outside the power distribution room, and the air inlet end of the negative pressure fan 1 is connected to the air duct 2, which is introduced into the power distribution room, and a bellows 5 is installed in each power distribution cabinet, and the electrical components in the power distribution cabinet are installed on the surface of the bracket, and there is a gap between the bracket and the back plate of the power distribution cabinet, and the bellows 5 is installed in the gap, so that the bellows 5 is located between the back plate of the power distribution cabinet and the electrical components, and the top of the bellows 5 is connected to the air duct 2;

[0036] like Figure 3 , Figure 4 As shown, the position of the electrical components in front of the bellows 5 is shielded by a folding panel 7, and the folding panel 7 is composed of a plurality of vertically arranged V-shaped hinged plates 71, the hinged parts of the V-shaped hinged plates 71 are recessed toward the inside of the bellows 5, and the adjacent V-shaped hinged plates 71 are hinged, and the hinged parts between the adjacent V-shaped hinged plates 71 protrude toward the outside of the bellows 5, so that the folding panel 7 forms a continuous hinged folding device, and the top of the folding panel 7 is rotatably connected to the bellows 5, and the two rotating surfaces of the V-shaped hinged plate 71 are both provided with air outlets 72, and a spring is connected between the two rotating surfaces of the V-shaped hinged plate 71, so that the folding panel 7 has a tendency to be folded as a whole, and vertical grooves 74 are provided on both sides of the bellows 5, and the hinge shaft ends of the adjacent V-shaped hinged plates 71 are slidably inserted into the vertical grooves 74, and can move vertically along the vertical grooves 74;

[0037] A guide plate 73 is provided at the edge of the air outlet 72, and the guide plate 73 is inclined in the opposite direction to the hinged part of the V-shaped hinged plate 71;

[0038] like Figure 4As shown, the stretching assembly is arranged at the lower part of the bellows 5, and the stretching assembly includes a motor 8. The lower end of the folding panel 7 is rotatably connected to a base frame 82, and the base frame 82 vertically slides in the bellows 5. The motor 8 is installed outside the bellows 5, and the output shaft of the motor 8 penetrates into the fixed cam 81 in the bellows 5, and the cam 81 is pressed on the upper surface of the base frame 82;

[0039] Install an air inlet assembly 6 on the surface of the power distribution cabinet door;

[0040] The cooling operation is as follows:

[0041] The negative pressure fan 1 is turned on to make the air duct 2 extract the air in each wind box 5, so that negative pressure is formed in the wind box 5. The power distribution room can be equipped with air conditioning or not according to the ambient temperature. The air in the power distribution room enters the power distribution cabinet through the air inlet component 6. A front-to-back convection trend is formed between the air inlet component 6 and the folding panel 7. The air needs to pass through the electrical components to take away the heat and reach the folding panel 7. The hot air enters the wind box 5 through the air outlet 72 and is then discharged in a centralized manner. Since the air outlet 72 is evenly dispersed, the air convection path can cover the electrical component installation area, so as to carry out heat dissipation and cooling in a targeted manner.

[0042] During the cooling process, the motor 8 is turned on to rotate. The motor 8 itself is equipped with a reducer to slowly rotate the cam 81. The cam 81 presses down the base frame 82 to overcome the elastic force and be stretched and unfolded. The elastic force of the spring causes the folding panel 7 to fold, so that the folding panel 7 presents an intermittent unfolding and folding movement state. When the folding panel 7 is unfolded, the angle of the V-shaped hinge plate 71 increases, the spacing of the air outlet 72 increases, the distribution range of the air outlet 72 expands, and the air intake angle of the guide plate 73 shifts toward the vertical plane. When the folding panel 7 is folded, the angle of the V-shaped hinge plate 71 decreases, the spacing of the air outlet 72 decreases, the distribution range of the air outlet 72 decreases, and the air intake angle of the guide plate 73 shifts toward the horizontal plane, so that the position and angle of the air intake air outlet 72 change dynamically, and the convection distribution area changes dynamically, so that the airflow can fully cover the heat generation area where the electrical components are located, improve the uniform heat dissipation effect, and avoid the problem of insufficient heat dissipation caused by the existence of convection dead corners.

[0043] like Figure 5 , Figure 6 As shown, the air inlet assembly 6 includes an expansion cavity 61 that passes through the door of the power distribution cabinet, a fan 65 is arranged at the inner opening of the expansion cavity 61, and a filter plate 63 is arranged at the outer opening of the expansion cavity 61. The air entering the power distribution cabinet is filtered by the filter plate 63 to prevent dust from entering the power distribution cabinet and affecting its normal operation;

[0044] Long-term dust accumulation will cause the permeability of the filter plate 63 to decrease, affecting the ventilation and heat dissipation effect. When the permeability of the filter plate 63 decreases to a certain level, it needs to be automatically prompted. The principle is as follows:

[0045] like Figure 7As shown, a swing frame 62 is rotatably installed outside the expansion cavity 61, and the edge of the swing frame 62 is sealed with the expansion cavity 61 through an elastic layer. A spring is arranged between the swing frame 62 and the door of the power distribution cabinet to make the free end of the swing frame 62 tilt outward. The filter plate 63 is installed on the surface of the swing frame 62 by plugging or screw fixing. A first push switch 68 is arranged in the expansion cavity 61, and the first push switch 68 is electrically connected to an indicator light 64;

[0046] The fan 65 assists the negative pressure fan 1 in driving the air flow conduction. When the permeability of the filter plate 63 decreases, the air intake efficiency decreases, and the negative pressure strength in the power distribution cabinet increases, the swing frame 62 gradually overcomes the elastic force and closes to the cabinet door until the free end of the swing frame 62 touches the first push switch 68, so that the indicator light 64 works to remind the staff to clean the filter plate 63 in time.

[0047] like Figure 7 As shown, a gate opening 66 penetrating the expansion chamber 61 is provided on the surface of the distribution cabinet door, and a cover plate 67 is installed inside the expansion chamber 61 through elastic rotation of a torsion spring. The cover plate 67 is used to block the gate opening 66, and a first push switch 68 is installed at the free end of the cover plate 67. When the swing frame 62 touches the first push switch 68, and the staff fails to clean the filter plate 63 in time, the permeability of the filter plate 63 continues to decrease, causing the swing frame 62 to continue to rotate toward the cabinet door. The swing frame 62 pushes the cover plate 67 to rotate, and the cover plate 67 gradually opens the gate opening 66, and the airflow can enter the distribution cabinet through the gate opening 66, thereby maintaining the emergency air intake and avoiding overheating in the distribution cabinet.

[0048] Since the air duct 2 serves several power distribution cabinets, the bellows 5 in the power distribution cabinet can be selectively connected to the air duct 2. The bellows 5 and the air duct 2 are connected through the pipe connector 3. The specific structure is as follows:

[0049] like Figure 8 , Fig. 9 As shown, the pipe connector 3 includes a bellows 32, the surface of the air duct 2 has a branch port 31, the bellows 32 is connected to the branch port 31, the end of the bellows 32 has a plug 33, the top of the bellows 5 is provided with a sleeve 35, the sleeve 35 is adapted to be plugged with the plug 33, the sleeve 35 and the plug 33 are elastically rotated and installed with a lower sealing plate 36 and an upper sealing plate 34 respectively through a torsion spring, the end of the sleeve 35 has a stopper 37, and the edge of the plug 33 is provided with a clearance groove 38;

[0050] The flexible connection of the bellows 32 can overcome installation errors. The insert tube 33 is inserted into the sleeve 35 to abut against the lower sealing plate 36 to open the sleeve 35. The blocking rod 37 moves along the clearance groove 38 to abut against the upper sealing plate 34 to open the insert tube 33, so that the air duct 2 is connected to the bellows 5. When the connection is disconnected, the lower sealing plate 36 seals the sleeve 35 and the upper sealing plate 34 seals the insert tube 33 to prevent dust from entering the bellows 5 and the air duct 2, and also to prevent the idle insert tube 33 from inhaling air.

[0051] Since there are many distribution cabinets in the distribution room, and the air heat dissipation intensity of each distribution cabinet needs to be kept constant, the negative pressure suction intensity needs to be automatically adjusted according to the number of distribution cabinets served. The specific principle is as follows:

[0052] like Figure 1 , Fig.10 As shown, two negative pressure fans 1 are provided, and the two negative pressure fans 1 are connected in series with the air duct 2 in sequence to jointly extract the gas in the bellows 5. A pressure sensing component 4 is provided on the surface of the air duct 2 between the negative pressure fan 1 and the pipe connector 3. The pressure sensing component 4 includes an external through pipe 41, the external through pipe 41 passes through the air duct 2, a valve plate 42 is elastically slidably adapted in the external through pipe 41 through a spring, an expansion groove 43 is provided on the inner wall of the external through pipe 41, a touch portion of the second push switch 45 penetrates into the expansion groove 43, a pressure handle 44 is rotatably provided in the expansion groove 43, and the second push switch 45 is connected to the negative pressure fan 1 through a controller;

[0053] In the initial state, only one negative pressure fan 1 is working, and the negative pressure in the air duct 2 will act on the surface of the valve plate 42, causing the valve plate 42 to overcome the elastic force and slide in the direction of the air duct 2. If the valve plate 42 moves and disengages from the pressure handle 44, it means that the negative pressure strength at this time meets the heat dissipation and ventilation requirements, and there is no need to start another negative pressure fan 1 to work. If the movement of the valve plate 42 does not disengage from the pressure handle 44, it means that the negative pressure strength at this time does not meet the heat dissipation and ventilation requirements of the distribution cabinet. The valve plate 42 resists the deflection of the pressure handle 44, causing the pressure handle 44 to press the second press switch 45. The second press switch 45 transmits an electrical signal to the controller, and the controller starts another negative pressure fan 1 to work, thereby increasing the suction intensity and increasing the negative pressure.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air cooling system for a power distribution cabinet, characterized in that: include: A negative pressure fan (1), wherein an air inlet end of the negative pressure fan (1) is connected to an air duct (2); A bellows (5), the bellows (5) being arranged between the back plate of the power distribution cabinet and the electrical components, the bellows (5) being connected to the air duct (2) via a pipe connector (3); A folding panel (7), the folding panel (7) being composed of a plurality of vertically arranged V-shaped hinged plates (71), each V-shaped hinged plate (71) being composed of two mutually hinged plate surfaces, the hinged portion between adjacent V-shaped hinged plates (71) protruding toward the outside of the bellows (5), the hinged portion between the two plate surfaces of each V-shaped hinged plate (71) being recessed toward the inside of the bellows (5), so that the folding panel (7) forms a continuously hinged folding device, the two rotating surfaces of the V-shaped hinged plate (71) are both provided with air outlets (72), the top of the folding panel (7) is rotatably connected to the bellows (5), and a spring is connected between the two rotating surfaces of the V-shaped hinged plate (71), so that the folding panel (7) as a whole has a tendency to be folded; A stretching component, the stretching component is used to intermittently pull down the lower end of the folding panel (7) so that the folding panel (7) can be intermittently folded and unfolded; An air inlet assembly (6), the air inlet assembly (6) being arranged on the surface of the power distribution cabinet door, the air flow driven by the negative pressure fan (1) passing through the air inlet assembly (6) entering the power distribution cabinet, and then passing through the air outlet (72), the wind box (5), and the air duct (2) in sequence to be discharged; The air inlet assembly (6) comprises an expansion cavity (61) penetrating the door of the power distribution cabinet, a fan (65) is arranged at the inner opening of the expansion cavity (61), and a filter plate (63) is arranged at the outer opening of the expansion cavity (61); A swing frame (62) is rotatably arranged outside the expansion chamber (61); the edge of the swing frame (62) is sealed with the expansion chamber (61) through an elastic layer; a spring is arranged between the swing frame (62) and the door of the power distribution cabinet so that the free end of the swing frame (62) tilts outward; the filter plate (63) is arranged on the surface of the swing frame (62); a first push switch (68) is arranged in the expansion chamber (61); the first push switch (68) is electrically connected to an indicator light (64); the free end of the swing frame (62) swings in the direction of the expansion chamber (61) to touch the first push switch (68); A gate opening (66) penetrating the expansion chamber (61) is provided on the surface of the power distribution cabinet door. A cover plate (67) is installed inside the expansion chamber (61) by elastic rotation of a torsion spring. The cover plate (67) is used to block the gate opening (66). The first push switch (68) is installed at the free end of the cover plate (67).

2. The air cooling system for the power distribution cabinet according to claim 1, characterized in that: The stretching assembly comprises a motor (8), the lower end of the folding panel (7) is rotatably connected to a base frame (82), the base frame (82) slides vertically in the bellows (5), a cam (81) is fixed to the output shaft of the motor (8), the cam (81) presses on the surface of the base frame (82), vertical grooves (74) are provided on both sides of the bellows (5), and the hinge shaft ends of the adjacent V-shaped hinged plates (71) move vertically along the vertical grooves (74).

3. The air cooling system for the power distribution cabinet according to claim 1, characterized in that: A guide plate (73) is provided at the edge of the air outlet (72), and the guide plate (73) is inclined in the opposite direction to the hinged portion of the V-shaped hinged plate (71).

4. The air cooling system for a power distribution cabinet according to claim 1, characterized in that: The pipe connector (3) comprises a bellows (32), the surface of the air duct (2) has a branch port (31), the bellows (32) is connected to the branch port (31), the end of the bellows (32) has a plug (33), the top of the bellows (5) is provided with a sleeve (35), and the sleeve (35) is adapted to be plugged into the plug (33).

5. The air cooling system for the power distribution cabinet according to claim 4, characterized in that: The sleeve (35) and the insertion tube (33) are respectively elastically rotatably mounted with a lower sealing plate (36) and an upper sealing plate (34) via a torsion spring. The sleeve (35) has a stopper (37) at the end thereof. A clearance groove (38) is provided at the edge of the insertion tube (33). The insertion tube (33) is inserted into the sleeve (35) to abut against the lower sealing plate (36) to open the sleeve (35). The stopper (37) moves along the clearance groove (38) to abut against the upper sealing plate (34) to open the insertion tube (33).

6. The air cooling system for a power distribution cabinet according to claim 1, characterized in that: Two negative pressure fans (1) are provided, and the two negative pressure fans (1) are connected in series to the air duct (2) in sequence to jointly extract the gas in the wind box (5). A pressure sensing component (4) is provided on the surface of the air duct (2) between the negative pressure fan (1) and the pipe connector (3).

7. The air cooling system for the power distribution cabinet according to claim 6, characterized in that: The pressure sensing component (4) comprises an external tube (41), the external tube (41) passes through the air duct (2), a valve plate (42) is provided in the external tube (41) through a spring elastic sliding adapter, an expansion groove (43) is provided on the inner wall of the external tube (41), a touch portion of the second push switch (45) penetrates into the expansion groove (43), a pressure handle (44) is rotatably provided in the expansion groove (43), the valve plate (42) presses the pressure handle (44) to rotate and press the second push switch (45), and the second push switch (45) is connected to the negative pressure fan (1) through a controller.

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