Heat dissipation device of circuit breaker

Abstract

The utility model belongs to the technical field of circuit breakers, and particularly relates to a heat dissipation device of a circuit breaker. Comprising a shell and a circuit breaker body arranged in the shell, the shell is provided with a plurality of ventilation grooves formed along the circumferential surface, and the circuit breaker further comprises at least one cooling module which is detachably arranged at the top of the shell, the cooling module comprises a cooling fan arranged at the top of the shell, a heat dissipation fan arranged above the cooling fan and a thermoelectric cold dissipation assembly arranged between the cooling fan and the heat dissipation fan; the exhaust module comprises a bearing arranged below the cooling fan, a cold air exhaust rod with one end rotationally connected into the bearing and the other end extending into the shell, a plurality of rotary flowing pieces arranged on the cold air exhaust rod and used for driving the cold air exhaust rod to rotate, and a plurality of exhaust holes formed in the circumferential face of the cold air exhaust rod. And the bottom end of the cold air exhaust rod is closed. The utility model aims to provide a circuit breaker heat dissipation device which is efficient, detachable and strong in heat dissipation capability.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of circuit breaker, especially a circuit breaker heat dissipation device. BACKGROUND

[0002] In the power system, the circuit breaker plays an extremely important role. As a kind of switch electric appliance that can be connected and disconnected under normal and fault conditions, it is widely used in power generation, power transmission, power distribution and power consumption and other aspects, undertakes the key task of controlling and protecting the power system, and plays an indispensable role in guaranteeing the safe and stable operation of the power system.

[0003] However, in the actual operation process, the circuit breaker in the prior art has problems that cannot be ignored. With the continuous increase of the capacity of the power system and the increase of the working frequency of the circuit breaker, a large amount of heat will be generated when the circuit breaker is running. At present, many circuit breakers only rely on simple natural heat dissipation or single ventilation slot for heat dissipation, and the heat dissipation capacity is seriously insufficient. For example, although some traditional circuit breakers are provided with ventilation slots, the internal heat is still difficult to dissipate quickly under the condition of long-time high-load working state, resulting in continuous temperature rise in the circuit breaker. The excessively high temperature not only affects the performance and service life of the electronic components in the circuit breaker, but also may cause failure, reduce the reliability of the power system operation, and even may cause serious safety accidents, which greatly affects people's production and life. Therefore, it is of great practical significance to develop a high-efficiency circuit breaker heat dissipation device. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a kind of circuit breaker heat dissipation device that is efficient, detachable and has strong heat dissipation capacity to alleviate the problems mentioned in the above background.

[0005] The utility model aims at realizing the purpose, a kind of circuit breaker heat dissipation device, including shell and the circuit breaker body being arranged in shell, the shell has multiple ventilation slots formed along the circumferential surface, further including:

[0006] Cooling module is designed as at least one and detachable installation in shell top, the cooling module includes cooling fan being arranged in shell top, heat dissipation fan being arranged above cooling fan and thermoelectric cooling assembly being arranged between cooling fan and heat dissipation fan;

[0007] Discharge module includes bearing being arranged below cooling fan, cold air discharge rod being rotatably connected in one end in bearing and extending to shell in another end, multiple rotating flow sheets being arranged on cold air discharge rod and used to drive cold air discharge rod to rotate, multiple discharge holes being formed in the circumferential surface of cold air discharge rod, and the bottom end of cold air discharge rod is closed.

[0008] The utility model is further provided, and the thermoelectric cooling assembly includes:

[0009] A thermoelectric element is arranged between the cooling fan and the heat-dissipating fan, and has a heat-absorbing surface and a heat-releasing surface arranged oppositely, wherein the heat-absorbing surface faces the inside of the shell;

[0010] A heat-dissipating fin is arranged between the heat-dissipating fan and the heat-releasing surface;

[0011] A cooling fin is arranged between the cooling fan and the heat-absorbing surface.

[0012] The utility model further sets up, the shell top is equipped with the fixed component of detachable connection, the fixed component includes:

[0013] A support plate is arranged at the top of the shell, and an opening matched with the cooling fan is formed in the middle of the support plate;

[0014] A boss is arranged below the support plate and is communicated with the inside of the shell, and a through hole matched with the bearing is formed in the middle of the boss;

[0015] A fixed plate extends outward along the circumferential surface of the support plate, and the bottom of the fixed plate abuts against the top of the shell.

[0016] The utility model further sets up, the rotating flow piece is evenly arranged on the inner circumferential surface of the cold air discharge rod and is arranged longitudinally, and a flow path for rotating the cold air discharge rod by the flow of cold air is formed between adjacent rotating flow pieces.

[0017] The utility model further sets up, the discharge hole is sequentially formed from top to bottom along the flow path.

[0018] The utility model further sets up, the layout of the discharge hole on the cold air discharge rod is sparse at the top and dense at the bottom.

[0019] The utility model further sets up, the shell is further equipped with a discharge fan for discharging the air in the inside of the shell to the outside.

[0020] By adopting the above technical scheme, the utility model has the beneficial effects of:

[0021] 1. By cooperation of the cooling fan, the heat-dissipating fan and the thermoelectric cooling assembly, the heat-absorbing surface of the thermoelectric element absorbs heat, the heat-releasing surface releases heat, the heat-dissipating fin and the cooling fin assist heat exchange, and heat is rapidly transferred and dissipated, thereby improving the heat-dissipating performance of the circuit breaker.

[0022] 2. The rotating flow pieces are evenly arranged on the inner circumferential surface of the cold air discharge rod, the cold air flows through the flow path formed between adjacent rotating flow pieces to drive the cold air discharge rod to rotate, so that the cold air can be discharged more uniformly from the discharge hole, and the uniformity of the distribution of the cold air in the shell is improved.

[0023] 3. The exhaust hole is opened from top to bottom along the flow path and is arranged to be sparse at the top and dense at the bottom, so that more cold air can reach the bottom of the shell, improving the heat dissipation effect of the bottom of the shell. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a front view structural schematic diagram of the utility model;

[0025] Figure 2 is a sectional view structural schematic diagram of the utility model Figure 1 ;

[0026] Figure 3 is an exploded perspective schematic diagram of the cooling module in the utility model;

[0027] Figure 4 is a three-dimensional structural schematic diagram of the cold air exhaust rod in the utility model.

[0028] The figure mark is: 1, shell; 2, circuit breaker body; 3, ventilation groove; 4, cooling module; 40, cooling fan; 41, heat dissipation fan; 42, thermoelectric cooling assembly; 420, thermoelectric element; 4200, heat absorption surface; 4201, heat release surface; 421, heat dissipation fin; 422, cooling fin; 5, exhaust module; 50, bearing; 51, cold air exhaust rod; 52, rotating flow piece; 53, exhaust hole; 6, fixed component; 60, support plate; 61, boss; 62, fixed plate; 7, flow path; 8, exhaust fan. DETAILED DESCRIPTION

[0029] The utility model will be further described in conjunction with the specific embodiment with the drawings, referring to Figures 1-4 :

[0030] Embodiment 1:

[0031] The embodiment provides a circuit breaker heat dissipation device, including shell 1 and the circuit breaker body 2 in shell 1, the shell 1 has multiple ventilation grooves 3 formed along the circumferential surface, still includes:

[0032] Cooling module 4 is designed as at least one and can be detachably installed at the top of shell 1, the cooling module 4 includes cooling fan 40 arranged at the top of shell 1, heat dissipation fan 41 arranged above cooling fan 40 and thermoelectric cooling assembly 42 arranged between cooling fan 40 and heat dissipation fan 41;

[0033] The exhaust module 5 includes a bearing 50 arranged below the cooling fan 40, a cold air exhaust rod 51 rotatably connected to the bearing 50 at one end and extending into the housing 1 at the other end, a plurality of rotating flow plates 52 arranged on the cold air exhaust rod 51 and used to drive the cold air exhaust rod 51 to rotate, and a plurality of exhaust holes 53 formed in the circumferential surface of the cold air exhaust rod 51. The bottom end of the cold air exhaust rod 51 is closed.

[0034] The housing 1 provides protection and support for the circuit breaker body 2 and other components, prevents damage to the internal components caused by external factors, and assists in heat dissipation through the ventilation grooves 3. The housing 1 is generally closed or semi-closed in structure, can wrap the circuit breaker body 2, and the circumferential surface is distributed with a plurality of ventilation grooves 3.

[0035] The ventilation grooves 3 are used to promote the circulation of air inside and outside the housing 1, and help to dissipate the heat generated by the circuit breaker body 2. The ventilation grooves 3 are generally long strip-shaped or other shaped openings formed along the circumferential surface of the housing 1. The ventilation grooves 3 are part of the housing 1 and are integrally formed with the housing 1 or formed by later processing.

[0036] The cooling module 4 is used to cool the circuit breaker body 2, to ensure that the circuit breaker works stably in a suitable temperature environment, and to avoid affecting its performance and service life due to overheating.

[0037] The cooling fan 40 is used to accelerate air flow, blow the cold air generated by the thermoelectric cooling assembly 42 into the circuit breaker housing 1, enhance the circulation of cold air in the housing 1, and improve the heat dissipation efficiency. The cooling fan 40 mainly consists of a motor, a fan blade and a frame. The motor drives the fan blade to rotate, and the frame is used to fix the motor and the fan blade and is connected with other components of the cooling module 4. The fan blade is generally circular, and the frame is usually square or circular to adapt to the installation space. The cooling fan 40 can be fixed on the top of the housing 1 by a support member.

[0038] The heat dissipation fan 41 is used to quickly dissipate the heat generated by the heat releasing surface 4201 of the thermoelectric element 420 in the thermoelectric cooling assembly 42 to the external environment, to ensure the normal work of the thermoelectric element 420 and maintain its refrigeration effect. The heat dissipation fan 41 is also composed of a motor, a fan blade and a frame, similar to the cooling fan 40. The fan blade and the frame are similar in shape to the cooling fan 40, and are mostly circular or square. The heat dissipation fan 41 is installed above the cooling fan 40 and above the thermoelectric cooling assembly 42, which is convenient for discharging heat upward.

[0039] The thermoelectric cooling assembly 42 utilizes the thermoelectric effect to realize the functions of refrigeration and heat dissipation, absorbs the heat in the circuit breaker housing 1 and dissipates it to the outside, thereby reducing the temperature in the housing 1.

[0040] The exhaust module 5 is responsible for uniformly and efficiently delivering the cold air generated by the cooling module 4 to the inside of the circuit breaker housing 1, enhancing the internal air flow and improving the heat dissipation effect.

[0041] The bearing 50 is used to support the cold air discharge rod 51, so that it can rotate smoothly, reduce the friction when rotating, and ensure the stable operation of the discharge module 5. The bearing 50 is generally composed of an inner ring, an outer ring, rolling elements and a retainer, and its shape is generally annular. The bearing 50 is arranged below the cooling fan 40 and at one end of the cold air discharge rod 51, and plays a supporting and positioning role. The bearing 50 can be installed in the through hole matched with the bearing 50 in the middle of the boss 61 by welding or clamping groove, and is tightly matched with the boss 61.

[0042] The cold air discharge rod 51 is used as a conveying channel for cold air, and guides the cold air generated by the cooling module 4 to each part inside the shell 1. The cold air discharge rod 51 is generally tubular in structure and hollow inside for accommodating the flow of cold air, and is elongated and tubular in shape, with a closed bottom end to ensure that the cold air is discharged from the peripheral discharge holes 53. One end of the cold air discharge rod 51 is rotationally connected to the cooling module 4 through the bearing 50, so that it can rotate freely, and the other end extends to the inside of the shell 1 and is located near the circuit breaker body 2, so that the cold air can be evenly distributed on the circuit breaker body 2.

[0043] The rotating flow piece 52 drives the cold air discharge rod 51 to rotate by using the thrust generated by the flow of cold air, so that the cold air can be more evenly distributed inside the shell 1.

[0044] The discharge hole 53 discharges the cold air from the cold air discharge rod 51 to the inside of the shell 1, so as to realize heat exchange between the cold air and the circuit breaker body 2. The discharge hole 53 is a small hole formed on the peripheral surface of the cold air discharge rod 51, and its shape is generally circular. The discharge holes 53 are sequentially arranged from top to bottom along the flow path 7 formed by the rotating flow piece 52, and are arranged in a sparse upper and dense lower manner on the cold air discharge rod 51. The discharge hole 53 is formed by drilling or other processing techniques as a part of the cold air discharge rod 51.

[0045] Embodiment 2:

[0046] The circuit breaker heat dissipation device provided in the embodiment further has the following technical features in addition to the technical solutions of the above embodiments.

[0047] The thermoelectric cooling assembly 42 comprises:

[0048] The thermoelectric element 420 is arranged between the cooling fan 40 and the heat dissipation fan 41, and has an opposite heat absorbing surface 4200 and a heat releasing surface 4201. The heat absorbing surface 4200 faces the inside of the shell 1.

[0049] The heat dissipation fin 421 is arranged between the heat dissipation fan 41 and the heat releasing surface 4201.

[0050] Cooling fins 422 are arranged between the cooling fan 40 and the heat absorption surface 4200.

[0051] The thermoelectric element 420 absorbs heat at the heat absorption surface 4200 and releases heat at the heat release surface 4201 to achieve directional heat transfer and refrigeration based on the thermoelectric effect.

[0052] The heat dissipation fins 421 are arranged between the heat dissipation fan 41 and the heat release surface 4201 of the thermoelectric element 420 to increase the heat dissipation area of the heat release surface 4201 and improve the speed of heat dissipation.

[0053] The cooling fins 422 are arranged between the cooling fan 40 and the heat absorption surface 4200 of the thermoelectric element 420 to increase the heat exchange area of the heat absorption surface 4200 and improve the efficiency of heat absorption from the shell 1.

[0054] Embodiment 3:

[0055] The circuit breaker heat dissipation device provided in the embodiment further has the following technical features in addition to the technical solutions of the above embodiments.

[0056] The shell 1 is provided with a detachable fixing member 6 at the top, and the fixing member 6 comprises:

[0057] A support plate 60 is arranged at the top of the shell 1, and an opening matching the cooling fan 40 is formed in the middle of the support plate 60.

[0058] A boss 61 is arranged below the support plate 60 and communicates with the inside of the shell 1, and a through hole matched with the bearing 50 is arranged in the middle of the boss 61.

[0059] A fixing plate 62 extends outward along the peripheral surface of the support plate 60, and the bottom of the fixing plate 62 abuts against the top of the shell 1.

[0060] The fixing member 6 is used to realize detachable connection of the cooling module 4 with the top of the shell 1, provides stable support for the cooling module 4, ensures that the cooling module 4 does not shake or displace during operation, and guarantees the stability of the whole heat dissipation device.

[0061] The support plate 60 is used to bear the cooling fan 40, provides mounting position for the cooling fan 40, and disperses the weight of the cooling module 4, so that the force is uniformly distributed on the top of the shell 1. The support plate 60 is generally in the form of a flat plate, and an opening matched with the cooling fan 40 is arranged in the middle of the support plate 60. The shape of the support plate 60 is generally a square or circular flat plate, which is arranged on the top of the shell 1 and below the cooling module 4, and directly contacts the top of the shell 1. The support plate 60 can be connected with the fixing plate 62 by bolts or welding, and is mounted in cooperation with the cooling fan 40 through the opening.

[0062] The boss 61 provides mounting and positioning for the bearing 50, ensures the stability of the rotation center of the cold air discharge rod 51, and communicates the inside of the shell 1 with the outside, so that the cold air can smoothly enter the inside of the shell 1. The boss 61 is generally in the form of a column, and a through hole matched with the bearing 50 is arranged in the middle of the boss 61. The shape of the boss 61 is generally a cylinder, which is arranged below the support plate 60 and communicates with the inside of the shell 1, and is located directly below the cooling fan 40. The boss 61 is integrally formed with the support plate 60 or is fixedly connected with the support plate 60 by welding or the like, and is in interference fit or gap fit with the bearing 50 through the through hole.

[0063] The fixing plate 62 extends outward along the peripheral surface of the support plate 60, increases the contact area of the fixing member 6 with the top of the shell 1, improves the stability of the connection, and prevents the cooling module 4 from displacing during operation. The fixing plate 62 is generally in the form of a flat plate, and the bottom thereof abuts against the top of the shell 1. The shape of the fixing plate 62 matches the contour of the support plate 60, and surrounds the support plate 60. The fixing plate 62 is located on the peripheral surface of the support plate 60, and is connected with the support plate 60 by bolts, welding or the like, and is tightly attached to the top of the shell 1 by its own gravity and friction force.

[0064] Embodiment 4:

[0065] The embodiment provides a circuit breaker heat dissipation device, which has the following technical features in addition to the technical solutions of the above-mentioned embodiments.

[0066] The rotating flow pieces 52 are arranged uniformly on the inner circumferential surface of the cold air discharge rod 51 and are arranged in longitudinal rotation, and flow paths 7 for rotating the cold air discharge rod 51 by the flow of cold air are formed between adjacent rotating flow pieces 52.

[0067] The rotating flow pieces 52 are generally in a sheet structure, usually in a long strip shape, arranged uniformly on the inner circumferential surface of the cold air discharge rod 51 and arranged in longitudinal rotation. The rotating flow pieces 52 can be fixed on the inner circumferential surface of the cold air discharge rod 51 by bonding, welding or one-piece forming, and specific flow paths 7 are formed between adjacent rotating flow pieces 52.

[0068] The flow path 7 is used to guide the flow of cold air to generate a force to push the rotating flow piece 52, thereby driving the cold air discharge rod 51 to rotate, while ensuring that the cold air can be orderly discharged from the discharge hole 53. The flow path 7 is formed by the gap between adjacent rotating flow pieces 52, and the shape is irregular but has a certain directionality to guide the cold air to flow in a specific direction. The shape of the flow path 7 is generally spiral or similar spiral curved channel, which matches the rotating arrangement of the rotating flow piece 52.

[0069] The cold air generated by the cooling module 4 enters the cold air discharge rod 51 and flows in the flow path 7. The flowing cold air generates a pushing force on the rotating flow piece 52, which drives the rotating flow piece 52 to rotate the cold air discharge rod 51. The cold air is uniformly discharged from the discharge hole 53 to the inside of the circuit breaker housing 1 during rotation, achieving efficient heat dissipation.

[0070] Embodiment 5:

[0071] The embodiment provides a circuit breaker heat dissipation device, which further has the following technical features in addition to the technical solutions of the above embodiments.

[0072] The discharge holes 53 are sequentially arranged from top to bottom along the flow path 7.

[0073] The discharge holes 53 are sequentially arranged from top to bottom along the flow path 7. The discharge holes 53 are arranged along the flow path 7, so that the cold air can continuously enter the housing 1 from the discharge holes 53 at different positions during the flow process, and form a more intense convection with the hot air inside, which is conducive to better displacement of the hot air and improves the overall heat dissipation performance. At the same time, the discharge holes 53 are sequentially arranged according to the flow path 7, so that the air currents discharged from each discharge hole 53 cooperate with each other, reducing the mutual interference and disorder between the air currents, so that the cold air can enter the housing 1 in a relatively stable state, and better play the heat dissipation role.

[0074] Embodiment 6:

[0075] The embodiment provides a circuit breaker heat dissipation device, which further has the following technical features in addition to the technical solutions of the above embodiments.

[0076] The layout of the exhaust holes 53 on the cold air exhaust rod 51 is sparse at the top and dense at the bottom.

[0077] The layout of the exhaust holes 53 on the cold air exhaust rod 51 is sparse at the top and dense at the bottom, and the purpose of this design is that the lower part of the device often concentrates some heat-generating elements, such as some power elements of electrical equipment, etc., which will generate a large amount of heat when working, and more cold air is needed for heat dissipation. Therefore, the exhaust holes 53 at the lower part of the cold air exhaust rod 51 are designed to be more dense, so that more cold air can be discharged from the lower part, and the heat-concentrated area is cooled intensively, ensuring that the temperature of the lower part of the device is effectively controlled.

[0078] Embodiment 7:

[0079] The circuit breaker heat dissipation device provided in the embodiment further has the following technical features in addition to the technical solutions of the above-mentioned embodiments.

[0080] The shell 1 is further provided with an exhaust fan 8 for exhausting air inside the shell 1 to the outside.

[0081] The exhaust fan 8 is used to accelerate the exhaust of hot air inside the shell 1, promote the circulation of air inside and outside the shell 1, cooperate with the cooling module 4 and the exhaust module 5, improve the overall heat dissipation efficiency, and avoid the accumulation of hot air in the shell 1 to cause the temperature to be too high. The exhaust fan 8 can be fixed on the shell 1 by means of bolts, buckles or welding, etc.

[0082] The motor drives the fan blades to rotate at high speed, so that the air produces directional flow, forms negative pressure, and the hot air inside the shell 1 is extracted, and the external cold air enters the shell 1 through the ventilation groove 3, etc., forming air circulation, thereby taking away the heat generated by the circuit breaker body 2.

[0083] The above-mentioned embodiments are only preferred embodiments of the present application, and do not limit the protection scope of the present application, so: all equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A circuit breaker heat sink device comprising a housing (1) and a circuit breaker body (2) disposed in the housing (1), the housing (1) having a plurality of ventilation grooves (3) formed along the peripheral surface, characterized in that Also comprising: a cooling module (4) designed to be at least one and detachably mounted on the top of the shell (1), the cooling module (4) comprising a cooling fan (40) arranged on the top of the shell (1), a heat dissipation fan (41) arranged above the cooling fan (40), and a thermoelectric cooling assembly (42) arranged between the cooling fan (40) and the heat dissipation fan (41); an exhaust module (5) comprising a bearing (50) arranged below the cooling fan (40), a cold air exhaust rod (51) rotatably connected at one end to the bearing (50) and extending into the shell (1) at the other end, a plurality of rotating flow pieces (52) arranged on the cold air exhaust rod (51) and used to drive the cold air exhaust rod (51) to rotate, and a plurality of exhaust holes (53) formed on the circumferential surface of the cold air exhaust rod (51), the bottom end of the cold air exhaust rod (51) being closed.

2. The circuit breaker heat sink of claim 1, wherein, The thermoelectric cooling assembly (42) comprises: a thermoelectric element (420) arranged between the cooling fan (40) and the heat dissipation fan (41), the thermoelectric element (420) having an opposite heat absorbing surface (4200) and heat releasing surface (4201), the heat absorbing surface (4200) facing the inside of the shell (1); a heat dissipation fin (421) arranged between the heat dissipation fan (41) and the heat releasing surface (4201); a cooling fin (422) arranged between the cooling fan (40) and the heat absorbing surface (4200).

3. The circuit breaker heat sink of claim 1, wherein, The top of the shell (1) is provided with a detachable fixing member (6), the fixing member (6) comprising: a support plate (60) arranged on the top of the shell (1), the support plate (60) having an opening in the middle matching the cooling fan (40); a boss (61) arranged below the support plate (60) and communicating with the inside of the shell (1), the boss (61) having a through hole in the middle matching the bearing (50); a fixed plate (62) extending outward along the circumferential surface of the support plate (60), the bottom of the fixed plate (62) abutting against the top of the shell (1).

4. The circuit breaker heat sink of claim 1, wherein, The rotating flow pieces (52) are uniformly arranged on the inner circumferential surface of the cold air exhaust rod (51) and longitudinally arranged, the flow paths (7) for rotating the cold air exhaust rod (51) by the flow of cold air being formed between adjacent rotating flow pieces (52).

5. The circuit breaker heat sink device of claim 4, wherein, The exhaust holes (53) are sequentially arranged along the flow paths (7) from top to bottom.

6. The circuit breaker heat sink of claim 5, wherein, The arrangement of the exhaust holes (53) on the cold air exhaust rod (51) is sparse at the top and dense at the bottom.

7. The circuit breaker heat sink of claim 1, wherein, The shell (1) is further provided with an exhaust fan (8) for exhausting air inside the shell (1) to the outside.

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