Heat dissipation optimization type electric vehicle charger

Abstract

The utility model provides a heat dissipation optimization type electric vehicle charger. The heat dissipation optimization type electric vehicle charger comprises a shell, a charger body, a power line and a charging line. The shell is divided into an upper shell body and a lower shell body, and the upper shell body is installed on the lower shell body through cooperation of an installation column and an installation base. The left and right ends of the upper shell are respectively provided with a ventilation slot; a fan is installed in the upper shell and located between the two ventilation grooves, and the air outlet direction of the fan is parallel to the left-right direction. The temperature in the shell is higher than the temperature outside the shell due to heating of the charger main body, and air is blown towards the ventilation slot through the fan according to the Bernoulli principle; therefore, the air circulation rate in the shell is accelerated, hot air in the shell and cold air outside the shell are continuously and rapidly exchanged, and the purpose of heat dissipation is achieved.

Description

Technical Field

[0001] The utility model relates to the field of electric vehicle charging, in particular to a heat dissipation optimized electric vehicle charger. Background Art

[0002] To ensure the normal use of electric vehicles, they need to be charged in time when they lack power. That is, the charger must be connected to an external power source to charge the battery inside the electric vehicle. Existing electric vehicle chargers generate heat during the charging process. Although manufacturers have recognized the importance of heat dissipation and designed heat dissipation holes on the charger casing to accelerate heat dissipation, the number of heat dissipation holes in common chargers is limited and scattered, making it impossible to form an effective air convection channel. This still causes heat to accumulate inside the charger and is difficult to dissipate quickly. Over time, high temperatures will accelerate the aging of the charger's internal components, reduce its operating efficiency, and even cause safety hazards such as short circuits and burns. Utility Model Content

[0003] The present application provides a heat dissipation optimized electric vehicle charger, which has the effect of continuously and quickly dissipating heat.

[0004] The heat dissipation optimized electric vehicle charger provided in this application adopts the following technical solution:

[0005] A heat dissipation optimized electric vehicle charger comprises a shell, a charger body, a power cord and a charging cable, wherein the charger body is placed in the shell, and the power cord and charging cable are respectively located on one side of the charger body and electrically connected to the charger body; the shell is divided into an upper shell and a lower shell, and mounting posts are respectively fixed at the four corners of the upper shell, and mounting seats corresponding to the mounting posts are respectively fixed at the four corners of the lower shell, and the upper shell is mounted on the lower shell through the cooperation of the mounting posts and the mounting seats; a ventilation slot is respectively provided at the left and right ends of the upper shell; a fan is installed in the upper shell, and the fan is located between the two ventilation slots, and the air outlet direction of the fan is parallel to the left and right directions.

[0006] Through the above technical solution, the temperature inside the shell is higher than the temperature outside the shell due to the heat generated by the charger body, and the Bernoulli principle is utilized by the fan to blow air toward the ventilation slots; since the airflow formed by the fan not only moves backward, but also drives the surrounding air to flow in the same direction through viscous friction, an initial secondary flow is formed, and a low-pressure area is created, so that the still air in the shell is subjected to a pressure gradient directed toward the secondary flow, and the hot air in the shell continuously gathers toward the airflow of the fan from all directions; thereby accelerating the air circulation rate in the shell, and continuously and quickly exchanging the hot air in the shell with the cold air outside the shell, thereby achieving the purpose of heat dissipation.

[0007] Preferably, a convergent ring is installed at the air outlet end of the fan, and the cross section of the convergent ring is tapered toward one end of the ventilation slot; a cylinder is sleeved on the outside of the fan and the convergent ring.

[0008] Through the above technical solution, under the thrust of the fan, the outlet airflow will first expand and accelerate in the convergent ring to increase the outlet speed; because the static pressure of the outlet airflow is greater than the external atmospheric pressure at this time, it expands and diffuses outward in the cylinder, and the cylinder plays a guiding role; when the static pressure of the outlet airflow is the same as the external atmospheric pressure, it will become a horizontal flow, and the expansion and diffusion in the cylinder further accelerates the flow rate of the outlet airflow; and the speed of the outlet airflow is completely backward without a lateral component, which helps to accelerate the outlet airflow to the greatest extent in a small space to enhance the ability to gather hot air.

[0009] Preferably, the cylinder diameter d1 is smaller than the ventilation slot width d2 near the fan outlet end.

[0010] Through the above technical solution, due to the influence of the hot air gathered towards the fan, the cross-sectional area of ​​the airflow blown out by the fan will become larger, so the airflow will diffuse outward in a certain cone shape. When the airflow cross-sectional area is equal to the ventilation slot cross-sectional area, the exhaust flow rate reaches the maximum; the air flow rate at the air inlet end also reaches the maximum. Therefore, the width d2 of the ventilation slot at the air outlet end should be designed to be larger than the cylinder diameter d1, and should be the same as the airflow cross-sectional diameter calculated in the test.

[0011] Preferably, the width D of the ventilation slot near the air inlet end of the fan is greater than the width d2 of the ventilation slot near the air outlet end of the fan.

[0012] Through the above technical solution, the air inlet end, which is larger than the air outlet end, can effectively prevent the occurrence of hot air backflow and help to accelerate the circulation of air.

[0013] Preferably, a dustproof net is further included, and a net frame is wrapped around the outside of the dustproof net; a support frame is respectively installed on the two ventilation slots through bolts, and an accommodating slot for accommodating the sliding installation of the net frame is opened in the support frame.

[0014] Through the above technical solution, the dustproof net is used to prevent external dust from entering the outer casing through the ventilation slots; at the same time, since the fan blows air toward the ventilation slots, the dustproof net will be blown outward. Over time, the dustproof net may fall off from the net frame or deform, resulting in the loss of dustproof function, so a support frame is used to prevent the deformation of the dustproof net.

[0015] Preferably, a heat sink grid is arranged and installed in the lower shell, and a mounting groove for installing the charger body is opened on the heat sink grid, and avoidance holes for the power cord and the charging cable to pass through are respectively opened on both sides of the lower shell.

[0016] Through the above technical solution, the heat sink grid design arranged in the lower shell increases the heat dissipation area, which is conducive to the rapid dissipation of heat generated by the charger during operation into the air; at the same time, the avoidance hole design ensures that the power cord and charging cable will not be squeezed or constrained when passing through.

[0017] Preferably, an anti-slip washer is installed at each of the four corners of the outer bottom surface of the lower shell.

[0018] Through the above technical solution, the anti-slip washer can increase the friction between the charger and the placement surface, and can better adapt to placement surfaces of different materials and inclinations.

[0019] The technical effects of this utility model are mainly reflected in the following aspects:

[0020] 1. The utility model utilizes Bernoulli's principle by blowing air toward the ventilation slots through a fan, thereby accelerating the air circulation rate within the housing, thereby continuously and rapidly exchanging the hot air inside the housing with the cold air outside the housing, thereby achieving the purpose of heat dissipation;

[0021] 2. The utility model increases the air outlet speed by setting a convergent ring and a cylinder, which helps to accelerate the air flow to the maximum extent in a small space and enhance the ability to gather hot air;

[0022] 3. The utility model provides a dustproof net and a support frame. The dustproof net is used to prevent external dust from entering the housing through the ventilation slots, and the support frame is used to prevent the dustproof net from being deformed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present application;

[0024] Figure 2 In the embodiment of this application Figure 1 Schematic cross-section diagram along the AA section line;

[0025] Figure 3 This is a schematic diagram of the overall structure of the support base and the dustproof net in the embodiment of the present application.

[0026] Figure markings: 1. outer shell; 11. upper shell; 111. mounting column; 112. ventilation slot; 12. lower shell; 121. mounting seat; 122. avoidance hole; 2. charger body; 3. power cord; 4. charging cable; 5. fan; 6. convergence ring; 7. cylinder; 8. dust net; 81. mesh frame; 9. support frame; 91. receiving groove; 10. heat sink grid; 101. mounting groove; 20. anti-slip gasket. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-3, the specific implementation methods of the utility model are further described in detail to make the technical solution of the utility model easier to understand and grasp.

[0028] The present application discloses a heat dissipation optimized electric vehicle charger:

[0029] Reference Figure 1-2 A heat dissipation optimized electric vehicle charger includes a shell 1, a charger body 2, a power cord 3 and a charging cord 4. The charger body 2 is placed in the shell 1, and the power cord 3 and the charging cord 4 are respectively located on one side of the charger body 2 and electrically connected to the charger body 2; the shell 1 is divided into an upper shell 11 and a lower shell 12, and the four corners of the upper shell 11 are respectively fixed with mounting posts 111, and the four corners of the lower shell 12 are respectively fixed with mounting seats 121 corresponding to the mounting posts 111. The upper shell 11 is installed on the lower shell 12 through the cooperation of the mounting posts 111 and the mounting seats 121; a ventilation slot 112 is respectively opened at the left and right ends of the upper shell 11; a fan 5 is installed in the upper shell 11, and the fan 5 is located between the two ventilation slots 112, and the air outlet direction of the fan 5 is parallel to the left and right direction.

[0030] Due to the heat generated by the charger body 2, the temperature inside the shell 1 is higher than the temperature outside the shell 1, and the fan 5 blows air toward the ventilation slot 112 using the Bernoulli principle; since the airflow formed by the fan 5 not only moves backward, but also drives the surrounding air to flow in the same direction through viscous friction, forming an initial secondary flow, and creating a low-pressure area, the still air in the shell 1 is subjected to a pressure gradient directed to the secondary flow, so the hot air in the shell 1 continuously gathers from all directions to the airflow of the fan 5; thereby accelerating the air circulation rate in the shell 1, and continuously and quickly exchanging the hot air in the shell 1 with the cold air outside the shell 1, thereby achieving the purpose of heat dissipation.

[0031] Reference Figure 2 The fan 5 is provided with a convergent ring 6 at the outlet end, and the cross section of the convergent ring 6 is tapered at one end facing the ventilation slot 112. A cylinder 7 is sleeved on the outside of the fan 5 and the convergent ring 6. Under the thrust of the fan 5, the outlet airflow will first expand and accelerate inside the convergent ring 6, increasing the outlet velocity. Since the static pressure of the outlet airflow is greater than the external atmospheric pressure at this time, it will expand and diffuse outward inside the cylinder 7, and the cylinder 7 will play a guiding role. When the static pressure of the outlet airflow is the same as the external atmospheric pressure, it will become a horizontal flow, and the expansion and diffusion inside the cylinder 7 further accelerates the velocity of the outlet airflow. The velocity of the outlet airflow is completely backward, without any lateral component, which helps to accelerate the outlet airflow to the greatest extent in a small space to enhance the ability to gather hot air.

[0032] Reference Figure 2The diameter d1 of cylinder 7 is smaller than the width d2 of ventilation slots 112 near the outlet end of fan 5. Due to the influence of the hot air flowing toward fan 5, the cross-sectional area of ​​the airflow from fan 5 increases, causing the airflow to diffuse outward in a conical shape. When the cross-sectional area of ​​the airflow is equal to the cross-sectional area of ​​ventilation slots 112, the exhaust flow rate reaches its maximum, and the air flow rate at the air inlet also reaches its maximum. Therefore, the width d2 of ventilation slots 112 at the outlet end should be designed to be larger than the diameter d1 of cylinder 7 and should be the same as the cross-sectional diameter of the airflow calculated in the test.

[0033] Reference Figure 2 The width D of the ventilation slot 112 near the air inlet of the fan 5 is larger than the width d2 of the ventilation slot 112 near the air outlet of the fan 5. The air inlet that is larger than the air outlet can effectively prevent the occurrence of hot air backflow and help accelerate air circulation.

[0034] Reference Figure 3 , further comprising a dust screen 8, which is further wrapped with a mesh frame 81; support frames 9 are bolted to the two ventilation slots 112, each of which has a receiving slot 91 within the support frame 9 for slidingly accommodating the mesh frame 81. The dust screen 8 is used to prevent external dust from entering the housing 1 through the ventilation slots 112; at the same time, since the fan 5 blows air toward the ventilation slots 112, it will blow the dust screen 8 outward. Over time, the dust screen 8 may fall off the mesh frame 81 or deform, thereby losing its dust-proof function. Therefore, the support frame 9 is used to prevent the dust screen 8 from deforming.

[0035] Reference Figure 2 The lower housing 12 is equipped with a heat sink grid 10, which is provided with mounting slots 101 for the charger body 2. On either side of the lower housing 12 are clearance holes 122 for the power cord 3 and charging cord 4 to pass through. The arrangement of the heat sink grid 10 within the lower housing 12 increases the heat dissipation area, allowing the heat generated by the charger to be quickly dissipated into the air. The clearance holes 122 also ensure that the power cord 3 and charging cord 4 are not squeezed or constrained during passage.

[0036] Reference Figure 2 , an anti-skid washer 20 is installed at each of the four corners of the outer bottom surface of the lower shell 12. The anti-skid washer 20 can increase the friction between the charger and the placement surface, and can better adapt to placement surfaces of different materials and inclinations.

[0037] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementation methods. Any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection required by the present invention.

Claims

1. A heat dissipation optimized electric vehicle charger, comprising a housing (1), a charger body (2), a power cord (3) and a charging cord (4), wherein the charger body (2) is placed in the housing (1), and the power cord (3) and the charging cord (4) are respectively located on one side of the charger body (2) and electrically connected to the charger body (2); characterized in that: The housing (1) is divided into an upper housing (11) and a lower housing (12); mounting posts (111) are fixed at the four corners of the upper housing (11); mounting seats (121) corresponding to the mounting posts (111) are fixed at the four corners of the lower housing (12); the upper housing (11) is mounted on the lower housing (12) through the cooperation between the mounting posts (111) and the mounting seats (121); a ventilation slot (112) is respectively provided at the left and right ends of the upper housing (11); a fan (5) is installed in the upper housing (11); the fan (5) is located between the two ventilation slots (112); and the air outlet direction of the fan (5) is parallel to the left and right directions.

2. The heat dissipation optimized electric vehicle charger according to claim 1, characterized in that: A convergent ring (6) is installed at the air outlet end of the fan (5), and the cross section of the convergent ring (6) is arranged in a tapered shape at one end facing the ventilation slot (112); a cylinder (7) is sleeved on the outside of the fan (5) and the convergent ring (6).

3. The heat dissipation optimized electric vehicle charger according to claim 2, characterized in that: The diameter d1 of the cylinder (7) is smaller than the width d2 of the ventilation slot (112) near the air outlet end of the fan (5).

4. The heat dissipation optimized electric vehicle charger according to claim 3, characterized in that: The width D of the ventilation slot (112) near the air inlet end of the fan (5) is greater than the width d2 of the ventilation slot (112) near the air outlet end of the fan (5).

5. The heat dissipation optimized electric vehicle charger according to claim 1, characterized in that: The invention also includes a dustproof net (8), and the dustproof net (8) is wrapped with a net frame (81); a support frame (9) is respectively installed on the two ventilation slots (112) by bolts, and an accommodating slot (91) for accommodating the sliding installation of the net frame (81) is provided in the support frame (9).

6. The heat dissipation optimized electric vehicle charger according to claim 1, characterized in that: A heat sink grid (10) is arranged and installed in the lower shell (12), and a mounting groove (101) for mounting the charger body (2) is provided on the heat sink grid (10). Avoidance holes (122) for the power cord (3) and the charging cord (4) to pass through are respectively provided on both sides of the lower shell (12).

7. The heat dissipation optimized electric vehicle charger according to claim 1, characterized in that: An anti-slip washer (20) is respectively installed at the four corners of the outer bottom surface of the lower shell (12).

Images