Charging device main contactor magnetic coil heat sink

Abstract

This utility model discloses a heat sink for the magnetic coil of the main contactor in a charging device, belonging to the technical field of charging devices. The heat sink includes a fan assembly and a temperature control component. The fan assembly is rotatable to dissipate heat from the magnetic coil. The temperature control component is attached to the surface of the magnetic coil and has three states: a first state, a second state, and a third state. In the first state, the temperature control component is in a metastable solid state, naturally dissipating heat from the magnetic coil. In the second state, the temperature control component is at a solid-liquid transition critical point, where molecular bonds break and absorb heat from the magnetic coil. In the third state, the temperature control component is in a liquid state, and the fan assembly is activated, allowing the temperature control component and the fan assembly to work together to dissipate heat. This utility model cools the magnetic coil in different states according to the temperature of the temperature control component, reducing the operating temperature of the magnetic coil to achieve suitable performance and stable operation of the equipment, ensuring the endurance of the small train.

Description

Technical Field

[0001] This utility model belongs to the technical field of charging devices, and in particular relates to a heat sink for the magnetic coil of the main contactor of a charging device. Background Technology

[0002] When the miniature train is in operation, its range is of paramount importance. The main contactor inside the charging device has reached the end of its service life, and there are no spare parts stored on site. The main contactor of the charging device has failed multiple times, which has caused the range of the miniature train on site to be unable to meet normal needs. This will affect the miniature train's inability to charge, causing the energy storage power supply to be depleted and unable to operate.

[0003] The existing devices have the following main shortcomings:

[0004] 1. The magnetic coil of the main contactor of the charging device cannot be engaged for a long time and has a short service life: The magnetic coil of the main contactor of the existing charging device has reached the end of its service life. When the circuit is closed for charging, the coil will dissipate heat, and the heating of the coil will affect the engagement and power supply of the main contactor.

[0005] 2. Insufficient heat dissipation of the main contactor of the charging device: The heat dissipation of the outer cover plate of the coil in the existing charging device is insufficient. During the charging process, the heat emitted by the coil cannot be dissipated, which affects the service life and practicality of the magnetic coil.

[0006] 3. High temperature of the magnetic coil of the main contactor of the charging device, affecting its performance: The heat dissipation performance of the main contactor of the existing charging device is insufficient, which leads to a sharp increase in coil heat and affects the charging performance.

[0007] Therefore, it is urgent to design a magnetic coil heat sink for the main contactor of a charging device to solve the problems mentioned above. Utility Model Content

[0008] The purpose of this invention is to provide a heat sink for the magnetic coil of the main contactor of a charging device, which has the advantages of low temperature and fast heat dissipation of the magnetic coil, and solves the problems mentioned in the background art.

[0009] To achieve the above objectives, the specific technical solution for the magnetic coil heat sink of the main contactor of the charging device of this utility model is as follows:

[0010] The main contactor magnetic coil heat sink of the charging device includes a fan assembly and a temperature control component. The fan assembly can rotate to dissipate heat from the magnetic coil. The temperature control component is in contact with the surface of the magnetic coil and can dissipate heat from the magnetic coil. The temperature control component can also control whether the fan assembly starts according to the temperature of the temperature control component. The temperature control component has a first state, a second state and a third state.

[0011] When the temperature control component is in the first state, it is in a metastable solid state and dissipates heat naturally from the magnetic coil.

[0012] When the temperature control component is in the second state, it is at the critical point of solid-liquid transition, and the molecular bonds break to absorb the heat of the magnetic coil.

[0013] When the temperature control component is in the third state, it is in a liquid state and the fan group is activated, so that the temperature control component and the fan group work together to dissipate heat.

[0014] Furthermore, the temperature control component enters different states based on the temperature of the temperature control component;

[0015] When the temperature of the temperature control component is lower than the first temperature, the temperature control component is in the first state;

[0016] When the temperature of the temperature control component is between the first temperature and the second temperature, the temperature control component is in the second state;

[0017] When the temperature of the temperature control component is higher than the second temperature, the temperature control component is in the third state.

[0018] Furthermore, a temperature sensor is installed on the temperature control component to obtain the temperature of the temperature control component.

[0019] Furthermore, it also includes a controller. The temperature sensor is electrically connected to the fan assembly through the controller. When the temperature sensor detects that the temperature of the temperature control component is greater than the second temperature, the controller controls the fan assembly to start.

[0020] Furthermore, the temperature control component includes a phase change core layer, which can switch between metastable solid state, solid-liquid transition critical point, and liquid state according to temperature.

[0021] Furthermore, the phase transition point of the phase transition core layer is located between the first temperature and the second temperature.

[0022] Furthermore, the temperature control component also includes a thermally conductive enhancement layer, which is connected to the phase change core layer and bonded to the magnetic coil.

[0023] Furthermore, the temperature control component also includes a protective layer, which is connected to the phase change core layer and is located at the end of the phase change core layer away from the thermally conductive enhancement layer.

[0024] Furthermore, the fan assembly includes a fan and a motor. The output end of the motor is fixedly connected to the fan, and the fan rotation can be controlled by starting and stopping the motor.

[0025] Furthermore, the motor is electrically connected to the controller, and the fan speed can be controlled by the temperature of the temperature control component.

[0026] This invention has the following advantages: by cooling the magnetic coil in different states according to the temperature of the temperature control component, the operating temperature of the magnetic coil is reduced, so as to achieve the applicable performance and stable operation of the equipment and ensure the endurance of the small train. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the charging device of this utility model;

[0028] Figure 2 This is a schematic diagram of the main contactor, magnetic coil, and heat sink of this utility model;

[0029] Figure 3 This is a schematic diagram of the temperature control component of this utility model;

[0030] The markings in the diagram are as follows: 1. Temperature control component; 11. Thermal conductivity enhancement layer; 12. Phase change core layer; 13. Protective layer; 2. Main contactor; 21. Magnetic coil; 3. Fan assembly; 4. Outgoing cabinet; 41. Incoming cabinet. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0033] The following is a reference to the appendix. Figure 1 To be continued Figure 3 This invention describes the main contactor magnetic coil heat sink of the charging device.

[0034] The charging device includes an outgoing cabinet 4 and an incoming cabinet 41. The incoming cabinet 41 is equipped with a main contactor 2, and the main contactor 2 is equipped with a magnetic coil 21.

[0035] Currently, existing devices mainly suffer from the following shortcomings:

[0036] 1. The magnetic coil of the main contactor of the charging device cannot be engaged for a long time and has a short service life: The magnetic coil of the main contactor of the existing charging device has reached the end of its service life. When the circuit is closed for charging, the coil will dissipate heat, and the heating of the coil will affect the engagement and power supply of the main contactor.

[0037] 2. Insufficient heat dissipation of the main contactor of the charging device: The heat dissipation of the outer cover plate of the coil in the existing charging device is insufficient. During the charging process, the heat emitted by the coil cannot be dissipated, which affects the service life and practicality of the magnetic coil 21.

[0038] 3. High temperature of the magnetic coil in the main contactor of the charging device, affecting performance: The heat dissipation performance of the main contactor in existing charging devices is insufficient, causing a sharp increase in coil heat and affecting charging performance.

[0039] Therefore, this heat sink includes a fan assembly 3 and a temperature control component 1. The fan assembly 3 can rotate to dissipate heat from the magnetic coil 21. The temperature control component 1 is in contact with the surface of the magnetic coil 21. The temperature control component 1 can dissipate heat from the magnetic coil 21 and can control whether the fan assembly 3 starts according to the temperature of the temperature control component 1. The temperature control component 1 has a first state, a second state and a third state.

[0040] When the temperature control component 1 is in the first state, the temperature control component 1 is in a metastable solid state, which naturally dissipates heat from the magnetic coil 21, and stores sensible heat energy with a specific heat capacity of 2.1 kJ / kg·K, thus delaying the temperature rise;

[0041] When the temperature control component 1 is in the second state, the temperature control component 1 is at the solid-liquid transition critical point, the molecular bonds break and absorb the heat of the magnetic coil 21, absorbing 200J / g of latent heat, and establishing a temperature buffer platform.

[0042] When the temperature control component 1 is in the third state, the temperature control component 1 is in a liquid state and the fan group 3 is started, so that the temperature control component 1 and the fan group 3 work together to dissipate heat.

[0043] Furthermore, the temperature control component 1 enters different states based on the temperature of the temperature control component 1;

[0044] When the temperature of temperature control component 1 is lower than the first temperature, temperature control component 1 is in the first state;

[0045] When the temperature of temperature control component 1 is between the first temperature and the second temperature, temperature control component 1 is in the second state;

[0046] When the temperature of temperature control component 1 is greater than the second temperature, temperature control component 1 is in the third state.

[0047] Specifically, the first temperature is 36 degrees Celsius. When the temperature of temperature control component 1 is less than 36 degrees Celsius, temperature control component 1 is in the first state. The second temperature is 38 degrees Celsius. When the temperature of temperature control component 1 is between 36 and 38 degrees Celsius, temperature control component 1 is in the second state. When the temperature of temperature control component 1 is greater than 38 degrees Celsius, temperature control component 1 is in the third state.

[0048] The temperature control component 1 is equipped with a temperature sensor to obtain the temperature of the temperature control component 1. Specifically, it also includes a controller. The temperature sensor is electrically connected to the fan group 3 through the controller. When the temperature sensor detects that the temperature of the temperature control component 1 is greater than a second temperature, the controller controls the fan group 3 to start.

[0049] The temperature control component 1 includes a phase change core layer 12, which can switch between metastable solid state, solid-liquid transition critical point and liquid state according to temperature. Specifically, the phase change point of the phase change core layer 12 is between the first temperature and the second temperature.

[0050] Preferably, the phase change core layer 12 is microencapsulated paraffin (Paraffin C38) with a latent heat value of 200 J / g.

[0051] The core component of microencapsulated paraffin (Paraffin C38) is linear alkane paraffin (Paraffin C38), which is encapsulated in microcapsules.

[0052] The microencapsulated paraffin wax (Paraffin C38) has a melting point of 38 degrees Celsius, which is precisely matched to the triggering of fan group 3 at this time.

[0053] The temperature control component 1 also includes a thermally conductive enhancement layer 11, which is connected to the phase change core layer 12 and is attached to the magnetic coil 21. Specifically, the thermally conductive enhancement layer 11 is a copper nanomesh with a mesh size of φ20nm. The thermal conductivity is increased from 0.2 to 1.8W / m·K through the copper nanomesh.

[0054] The temperature control component 1 also includes a protective layer 13, which is connected to the phase change core layer 12 and is located at the end of the phase change core layer 12 away from the thermally conductive enhancement layer 11. Specifically, the protective layer 13 is a SiO2 ceramic coating.

[0055] Fan assembly 3 includes a fan and a motor. The output end of the motor is fixedly connected to the fan, and the fan rotation can be controlled by starting and stopping the motor.

[0056] The motor is electrically connected to the controller, and the fan speed can be controlled by the temperature of the temperature control component 1. Specifically, when the temperature of the temperature control component 1 is greater than 38 degrees and less than 40 degrees, the fan operates at 30% speed; when the temperature of the temperature control component 1 is greater than 40 degrees and less than 42 degrees, the fan operates at 60% speed; and when the temperature of the temperature control component 1 is greater than 42 degrees, the fan operates at 100% speed.

[0057] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A heat sink for the magnetic coil of the main contactor of a charging device, characterized in that, Includes a fan assembly (3) and a temperature control component (1). The fan assembly (3) is rotatable to dissipate heat from the magnetic coil (21). The temperature control component (1) is attached to the surface of the magnetic coil (21). The temperature control component (1) can dissipate heat from the magnetic coil (21) and can control whether the fan assembly (3) is started according to the temperature of the temperature control component (1). The temperature control component (1) has a first state, a second state and a third state. When the temperature control component (1) is in the first state, the temperature control component (1) is in a metastable solid state and naturally dissipates heat from the magnetic coil (21); When the temperature control component (1) is in the second state, the temperature control component (1) is at the solid-liquid transition critical point, and the molecular bonds break to absorb the heat of the magnetic coil (21); When the temperature control component (1) is in the third state, the temperature control component (1) is in a liquid state and the fan group (3) is started, so that the temperature control component (1) and the fan group (3) work together to dissipate heat.

2. The magnetic coil heat sink for the main contactor of the charging device according to claim 1, characterized in that, The temperature control component (1) enters different states according to the temperature of the temperature control component (1); When the temperature of the temperature control component (1) is lower than the first temperature, the temperature control component (1) is in the first state; When the temperature of the temperature control component (1) is between the first temperature and the second temperature, the temperature control component (1) is in the second state; When the temperature of the temperature control component (1) is greater than the second temperature, the temperature control component (1) is in the third state.

3. The magnetic coil heat sink for the main contactor of the charging device according to claim 2, characterized in that, The temperature control component (1) is equipped with a temperature sensor, and the temperature of the temperature control component (1) is obtained through the temperature sensor.

4. The magnetic coil heat sink for the main contactor of the charging device according to claim 3, characterized in that, It also includes a controller. The temperature sensor is electrically connected to the fan assembly (3) through the controller. When the temperature sensor detects that the temperature of the temperature control component (1) is greater than the second temperature, the controller controls the fan assembly (3) to start.

5. The magnetic coil heat sink for the main contactor of the charging device according to claim 1, characterized in that, The temperature control component (1) includes a phase change core layer (12), which can switch between metastable solid state, solid-liquid transition critical point, and liquid state according to temperature.

6. The magnetic coil heat sink for the main contactor of the charging device according to claim 5, characterized in that, The phase transition point of the phase transition core layer (12) is between the first temperature and the second temperature.

7. The magnetic coil heat sink for the main contactor of the charging device according to claim 5, characterized in that, The temperature control component (1) further includes a thermally conductive enhancement layer (11), which is connected to the phase change core layer (12) and is attached to the magnetic coil (21).

8. The magnetic coil heat sink for the main contactor of the charging device according to claim 6, characterized in that, The temperature control component (1) also includes a protective layer (13), which is connected to the phase change core layer (12) and is located at the end of the phase change core layer (12) away from the thermally conductive enhancement layer (11).

9. The magnetic coil heat sink for the main contactor of the charging device according to claim 1, characterized in that, The fan assembly (3) includes a fan and a motor. The output end of the motor is fixedly connected to the fan, and the fan can be controlled to rotate by starting and stopping the motor.

10. The magnetic coil heat sink for the main contactor of the charging device according to claim 9, characterized in that, The motor is electrically connected to the controller, and the fan speed can be controlled by the temperature of the temperature control component (1).

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