A frame circuit breaker heat dissipation flow guide device

Abstract

The utility model discloses a frame circuit breaker heat dissipation flow guide device, by flow guide plate, fin, water cooling heat dissipation device, heat dissipation fin, fixed connection female row group, and the female row connecting plate is fixedly assembled with fin, and water cooling heat dissipation device is installed in the lower part of female row connecting plate, and is in close contact with female row, fin, and heat dissipation fin is also arranged at female row connecting plate, and is mutually matched with fin, and flow guide plate is surrounded with the heat dissipation fin of installation on female row connecting plate, water cooling heat dissipation device, heat dissipation fin, forms forced heat dissipation flow guide cavity. The utility model discloses high heat dissipation efficiency, and water cooling multi -tube is under, and quickly takes away female row heat capacity, and ensures that circuit breaker stable operation. The utility model discloses compact structure, and each part is closely matched and forms forced heat dissipation flow guide cavity, and utilizes space reasonably, and is convenient for installation layout.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, specifically to a heat dissipation and diversion device for a frame circuit breaker. Background Technology

[0002] Existing DC frame circuit breakers suffer from uneven heat dissipation due to uneven heat distribution by the heat guide plates, and complex installation and maintenance. Heat sinks are inefficient and prone to dust accumulation and blockage. Water-cooled devices are at risk of leakage, have high maintenance costs, and are complex systems. Non-powered air cooling is greatly affected by the environment and has slow heat dissipation. Fixed connection busbars have problems with poor heat dissipation and are prone to vibration and loosening. Utility Model Content

[0003] This utility model provides a heat dissipation and heat diversion device for a frame circuit breaker.

[0004] Technical solution: To solve the above problems, the present invention adopts the following technical solution.

[0005] A heat dissipation and diversion device for a frame circuit breaker is characterized by comprising a diversion plate, heat sinks, a water-cooled heat dissipation device, heat dissipation fins, and a fixed connecting busbar. The fixed connecting busbar is used to connect the two poles of a 4P series 2P DC frame circuit breaker. Heat sinks are fixedly mounted on the busbar connecting plate. The water-cooled heat dissipation device is installed at the lower part of the busbar connecting plate and is in close contact with the busbar and heat sinks. Heat dissipation fins are also arranged on the busbar connecting plate and cooperate with the heat sinks. The diversion plate, together with the heat sinks, water-cooled heat dissipation device, and heat dissipation fins installed on the busbar connecting plate, forms two forced heat dissipation and diversion cavities.

[0006] This utility model of water-cooled heat dissipation device typically includes a cold plate and a coolant circulation pipeline. The cold plate is installed at the lower part of the busbar connecting plate and is in close contact with the busbar and heat sink. The coolant circulation pipeline is connected to the inlet and outlet of the flow channel on the cold plate. The coolant circulation pipeline of the water-cooled heat dissipation device is connected to an external cooling system to form a complete heat dissipation circuit.

[0007] This utility model also includes a heat dissipation duct, and the heat dissipation fins are fixed together with the wall of the heat dissipation duct by welding, riveting, bolting or extrusion molding.

[0008] The working principle of this invention is as follows: When the 4P series 2P DC frame circuit breaker is working, current flows through the fixed connection busbar, and the busbar generates heat. At this time, the heat sink, which is in close contact with the busbar, begins to function, absorbing and dissipating the heat on the busbar.

[0009] In a water-cooled heat dissipation device, a cold plate is installed at the bottom of the busbar connecting plate, making close contact with the busbar and heat sink fins to rapidly absorb heat. Coolant flows in a coolant circulation pipe connected to the inlet and outlet channels on the cold plate. After absorbing heat from the cold plate, the coolant flows through the circulation pipe to the external cooling system. After being cooled by the cooling system, it flows back to the cold plate, forming a complete heat dissipation loop that continuously removes heat.

[0010] The heat dissipation fins are fixed to the wall of the heat dissipation channel. Utilizing the natural flow of air, the air exchanges heat with the heat dissipation fins as it flows through the heat dissipation channel, carrying away the heat from the fins and achieving the effect of air cooling.

[0011] The guide plate, heat sink, water cooling device, and heat dissipation fins together form a forced heat dissipation and flow channel, guiding the flow path of air and coolant, making heat dissipation more efficient and ensuring that the DC frame circuit breaker operates stably within a suitable temperature range.

[0012] The beneficial effects of this utility model are: 1. This utility model has high heat dissipation efficiency, employing water cooling, non-powered air cooling, and heat sinks simultaneously to quickly remove heat from the terminals, ensuring stable operation of the circuit breaker. 2. This utility model has a compact structure, with each component tightly fitted to form a forced heat dissipation and airflow guiding cavity, making reasonable use of space and facilitating installation layout. Furthermore, it is reliable in operation, with a stable water cooling circuit. Attached Figure Description

[0013] Figure 1 is a schematic diagram of the structure of this utility model.

[0014] The components in the diagram are named as follows: 1. Airflow guide plate; 2. Heat sink; 3. Water cooling device; 4. Heat sink fins; 5. Fixed connection busbar. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0016] A heat dissipation and diversion device for a frame circuit breaker includes a diversion plate 1, a heat sink 2, a water-cooled heat dissipation device 3, heat dissipation fins 4, and a fixed connecting busbar 5. The fixed connecting busbar 5 is used to connect the two poles of a 4P series 2P DC frame circuit breaker. The heat sink 2 is fixedly mounted on the busbar connecting plate. The water-cooled heat dissipation device 3 is installed at the lower part of the busbar connecting plate and is in close contact with the busbar and the heat sink. The heat dissipation fins 4 are also set at the busbar connecting plate and cooperate with the heat sink 2. The diversion plate 1, together with the heat sink 2, the water-cooled heat dissipation device 3, and the heat dissipation fins 4 installed on the busbar connecting plate, together enclose the two forced heat dissipation and diversion cavities. The diversion plate 1 is located in the middle.

[0017] The water-cooled heat dissipation device 3 of this utility model typically includes a cold plate and a coolant circulation pipeline. The cold plate is installed at the lower part of the busbar connecting plate and is in close contact with the busbar and the heat sink. The coolant circulation pipeline is connected to the inlet and outlet of the flow channel on the cold plate. The coolant circulation pipeline of the water-cooled heat dissipation device 3 is connected to an external cooling system to form a complete heat dissipation circuit.

[0018] This utility model also includes a heat dissipation duct, and the heat dissipation fins are fixed together with the wall of the heat dissipation duct by welding, riveting, bolting or extrusion molding.

[0019] The heat sink of this utility model is made of aluminum alloy and is tightly bonded to the upper surface of the busbar connecting plate by soldering or thermal grease (thermal resistance ≤0.1℃・W⁻¹). The contact area is not less than 95% of the heat sink base area, ensuring that the heat from the busbar is efficiently transferred to the heat sink.

[0020] The cold plate of this utility model is sealed to the bottom surface of the busbar connecting plate by a rubber sealing ring and fixed by M6 bolts evenly distributed in the circumference to ensure no leakage of coolant; thermal grease (thermal conductivity ≥5W / m・K) is applied at the contact point between the cold plate and the busbar, and the thermal resistance is ≤0.05℃・W⁻¹.

[0021] The heat dissipation fins of this utility model are made of copper alloy and are connected to the inner wall of the heat dissipation duct by continuous brazing with a welding strength of ≥50MPa. The inlet of the heat dissipation duct is aligned with the external cooling airflow channel, and the outlet is connected to the forced heat dissipation and airflow guiding cavity formed by the guide plate to ensure smooth airflow path.

[0022] The guide plate of this utility model is made of insulating high-temperature resistant plastic (such as PPS), and is sealed to the heat sink and the edge of the water cooling device housing by snap-fit. The joint is filled with silicone strip to prevent airflow short circuit. The bending angle of the guide plate is θ (optimized according to fluid dynamics simulation) to ensure that the airflow is evenly distributed to the two forced heat dissipation guide cavities.

[0023] The inner walls of the two forced heat dissipation and airflow guiding cavities of this invention are provided with airflow guiding ribs, with a rib spacing of d and a height of h (determined according to fluid simulation), guiding the airflow to sweep across the surface of the heat sink and heat dissipation fins at a speed of ≥5m / s.

[0024] The heat transfer path of this utility model is as follows: heat from the busbar → through the busbar connecting plate → simultaneously transferred to the heat sink (accounting for α) and the water-cooled plate (accounting for β); the heat sink dissipates heat through air convection, and the heat sink fins enhance natural convection; the water-cooling system removes heat through coolant, and finally exhausts it to the environment through an external cooling system (such as a radiator + fan).

[0025] The water-cooling process of this utility model is as follows: 1. Heat absorption: The cold plate of the water-cooled heat dissipation device is installed on the busbar connection plate, in close contact with the busbar and heat sink. When the busbar generates heat due to current flow, the cold plate can quickly absorb this heat. 2. Heat transfer and circulation: The coolant flows in the coolant circulation pipe, which is connected to the inlet and outlet of the flow channel on the cold plate. The coolant that has absorbed heat from the cold plate will flow to the external cooling system through the circulation pipe. 3. Cooling and return: After being cooled by the external cooling system, the coolant flows back to the cold plate, forming a complete heat dissipation loop, continuously carrying away the heat generated by the busbar.

[0026] The air-cooling process of this invention is as follows: The heat dissipation fins are fixed to the wall of the heat dissipation duct. When air flows naturally, it enters the heat dissipation duct. During the flow of air in the duct, heat exchange occurs between the air and the heat dissipation fins, carrying away the heat transferred from the terminals on the fins, thereby achieving the effect of air cooling.

[0027] In addition, the air guide plate, heat sink, water cooling device, and heat dissipation fins together form a forced heat dissipation and airflow guiding cavity. This cavity can guide the flow path of air and coolant, further improving the heat dissipation efficiency of water cooling and air cooling.

Claims

1. A heat dissipation and diversion device for a frame circuit breaker, characterized in that: It consists of a flow guide plate, heat sink, water cooling device, heat dissipation fins, and fixed connection busbar. The fixed connection busbar is used to connect the two poles of a 4P series 2P DC frame circuit breaker. The heat sink is fixedly mounted on the busbar connection plate. The water cooling device is installed at the lower part of the busbar connection plate and is in close contact with the busbar and heat sink. The heat dissipation fins are set at the busbar connection plate and cooperate with the heat sink. The flow guide plate, together with the heat sink, water cooling device, and heat dissipation fins installed on the busbar connection plate, surrounds the flow guide plate in the middle, forming two forced heat dissipation and flow guiding cavities.

2. The heat dissipation and diversion device for a frame circuit breaker according to claim 1, characterized in that: Water-cooled heat dissipation devices typically include a cold plate and coolant circulation piping. The cold plate is installed on the lower part of the busbar connecting plate and is in close contact with the busbar and heat sink. The coolant circulation piping is connected to the inlet and outlet channels on the cold plate. The coolant circulation piping of the water-cooled heat dissipation device is connected to the external cooling system to form a complete heat dissipation loop.

3. The heat dissipation and flow guiding device for a frame circuit breaker according to claim 1, characterized in that: It also includes heat dissipation ducts, where the heat dissipation fins are fixed to the wall of the heat dissipation ducts by welding, riveting, bolting or extrusion molding.

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