A high-safety vehicle-mounted miniature transformer

Abstract

This invention discloses a high-safety vehicle-mounted miniature transformer applied in the field of transformer technology. The invention utilizes an intake fan to draw external air from the intake chamber into the ventilation duct, enabling rapid flow of cool air within the duct. This improves the installation stability of the transformer body while effectively preventing heat transfer from the transformer body to the outer casing, thus avoiding burns caused by high temperatures. The cool air entering the upper duct blows towards the transformer body through the exhaust port, providing air cooling. Subsequent hot air returns from the hot air outlet to the ventilation duct and mixes with the remaining cool air, effectively reducing the temperature of the transformer exhaust and preventing safety accidents caused by the hot air, further enhancing the transformer's safety.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, and in particular to a high-safety vehicle-mounted miniature transformer. Background Technology

[0002] The main function of a vehicle-mounted transformer is to convert voltage, providing stable and suitable power to various electrical devices on the vehicle that require different voltages. As an important component of a vehicle-mounted mobile substation, the vehicle-mounted transformer is crucial for ensuring the stability and safety of the vehicle's electrical system. For example, Chinese Patent CN118748117B discloses a vehicle-mounted transformer for a mobile substation, which uses a heat dissipation mechanism to cool the transformer. Most existing transformer shells are made of metal materials, with heat sinks arranged on the shell for direct heat dissipation. For example, Chinese Patent CN120473293A discloses a fireproof and explosion-proof safety transformer. During the operation of the transformer, the heat generated is transferred to the shell. The transformer shell becomes very hot, which can easily cause safety accidents, such as fires caused by contact with flammable materials, or burns caused by accidental contact with the transformer. When using air cooling, the hot air discharged can also easily cause safety accidents due to high temperature. Summary of the Invention

[0003] The core of this invention lies in solving the safety accident problem caused by high temperature of transformers in the prior art by preventing the heat generated by the transformer body from being transferred to the outer shell and by using a mixture of hot and cold air for cooling.

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

[0005] A high-safety vehicle-mounted small transformer includes a transformer body and an outer shell fixedly connected to the outside of the transformer body. A left end plate and a right end plate are fixedly connected to both ends of the outer shell. A ventilation duct is fixedly connected between the two ends of the left end plate and the right end plate. The two ventilation ducts clamp the front and rear ends of the transformer body. An air inlet chamber is fixedly connected between the ends of the two ventilation ducts near the right end plate. An air inlet fan is fixedly connected inside the air inlet chamber.

[0006] An upper air duct is fixedly connected between the tops of the two ventilation ducts. The upper air duct contacts the top of the transformer body, and an air outlet is opened in the middle of the bottom end of the upper air duct. A hot air outlet is opened at the end of each of the two ventilation ducts near the left end plate, and the two sets of hot air outlets are arranged facing each other.

[0007] Furthermore, the upper air duct is T-shaped, and an air-guiding arc plate is fixedly connected to the lower end of the connection between the upper air duct and the ventilation duct. The air-guiding arc plate extends into the ventilation duct and slides to connect with the inner wall of the ventilation duct.

[0008] Furthermore, a guide plate is fixedly connected to the end of the upper opening of the air outlet near the left end plate, and the height of the guide plate is less than the internal height of the upper air duct.

[0009] Optionally, a rotating shaft is rotatably connected to the middle of the hot air outlet. One end of the rotating shaft, which extends into the ventilation duct, is fixedly connected to a fan wheel, and the other end of the rotating shaft is equipped with a spiral fan wheel.

[0010] Furthermore, the rotating shaft is slidably connected to the spiral impeller, an extended cylinder is fixedly connected to the outside of the hot air outlet, and a sealing cover is fixedly connected to the end of the spiral impeller away from the hot air outlet, with the sealing cover in close contact with the outer port of the extended cylinder.

[0011] Furthermore, a fixed ring is fixedly connected to the middle of the rotating shaft, a linkage rod is hinged between the fixed ring and the spiral impeller, and a tension spring is rotatably connected between the fixed ring and the spiral impeller.

[0012] Furthermore, a drive shaft is fixedly connected between the two rotating shafts, and a dual-output shaft motor is fixedly connected to the bottom of the upper air duct. The dual-output shaft motor is fixedly connected to the drive shaft.

[0013] Furthermore, a connecting groove is provided on the outside of the sealed cover, and a shielding membrane is fixedly connected to one end of the connecting groove.

[0014] Furthermore, the shielding diaphragm is curved outwards into the outer cylinder and is made of elastic plastic.

[0015] Compared with the prior art, the advantages of this invention are:

[0016] (1) The present invention uses an intake fan to drive external air into the ventilation duct from the intake chamber, so that the cold airflow can flow rapidly in the ventilation duct. The ventilation duct clamps and fixes the transformer body from the front and back, and the upper air duct presses the transformer body from the top. While improving the installation stability of the transformer body, the cold airflow in the ventilation duct effectively prevents the heat generated by the transformer body from being transferred to the outer shell, effectively avoiding the burn accident caused by the high temperature of the outer shell, and thus effectively improving the safety of the transformer.

[0017] (2) The present invention utilizes the air-guiding arc plate to guide the cold airflow flowing in the ventilation duct to the upper air duct, so that part of the cold airflow in the ventilation duct enters the upper air duct, and the remaining cold airflow in the ventilation duct continues to move towards the left end plate. The cold airflow entering the upper air duct blows from the air outlet to the transformer body, and performs air cooling on the transformer body. The hot air after heat exchange with the transformer body returns to the ventilation duct from the hot air outlet. The hot air mixes with the remaining part of the cold air in the ventilation duct, thereby effectively reducing the temperature of the transformer exhaust air, effectively preventing the high temperature hot air blown out from causing safety accidents, and further effectively improving the safety of the transformer. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional structural diagram of the transformer body and ventilation duct of the present invention;

[0020] Figure 3 This is a three-dimensional structural diagram of the ventilation duct of the present invention;

[0021] Figure 4 This is a three-dimensional cross-sectional view of the ventilation duct of the present invention;

[0022] Figure 5 This is a bottom-view perspective view of the upper air duct structure of the present invention;

[0023] Figure 6 This is a three-dimensional cross-sectional view of the upper air duct of the present invention;

[0024] Figure 7 This is a three-dimensional structural diagram of the wind turbine and spiral wind turbine of the present invention;

[0025] Figure 8 This is a three-dimensional structural diagram of the wind turbine and the spiral wind turbine of the present invention in their separate states;

[0026] Figure 9 This is a three-dimensional structural diagram of the wind turbine of the present invention;

[0027] Figure 10 This is a three-dimensional structural diagram of the closed cover of the present invention.

[0028] Explanation of the labels in the diagram:

[0029] 1 Transformer body, 101 Outer shell, 102 Left end plate, 103 Right end plate, 2 Ventilation duct, 201 Air inlet chamber, 202 Air inlet fan, 203 Upper air duct, 204 Air outlet, 205 Hot air outlet, 206 Air induced arc plate, 207 Guide plate, 3 Rotating shaft, 301 Pneumatic impeller, 302 Spiral impeller, 303 Outer cylinder, 304 Sealing cover, 305 Fixing ring, 306 Linkage rod, 307 Tension spring, 308 Drive shaft, 309 Dual output shaft motor, 310 Connecting slot, 311 Shielding diaphragm. Detailed Implementation

[0030] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0031] First implementation method:

[0032] Please see Figures 1 to 3A high-safety vehicle-mounted miniature transformer includes a transformer body 1 and an outer casing 101 fixedly connected to the outside of the transformer body 1. A left end plate 102 and a right end plate 103 are fixedly connected to both ends of the outer casing 101. Ventilation ducts 2 are fixedly connected between the two ends of the left end plate 102 and the right end plate 103. The two ventilation ducts 2 clamp the front and rear ends of the transformer body 1, using the ventilation ducts 2 to clamp and fix the transformer body 1, mainly clamping and fixing the transformer coil body, effectively improving the installation stability of the transformer body 1. Furthermore, an air inlet chamber 201 is fixedly connected between the ends of the two ventilation ducts 2 near the right end plate 103. An air intake fan 202 is fixedly connected inside the air inlet chamber 201. The air intake fan 202 drives external air from the air inlet chamber 201 into the ventilation duct 2. Through the rapidly flowing cold air in the ventilation duct 2, the ventilation duct 2 isolates the heat transfer between the transformer body 1 and the outer casing 101, effectively preventing the heat generated by the transformer body 1 from dissipating outward from the outer casing 101, thereby effectively preventing the outer casing 101 from overheating and causing safety accidents.

[0033] When using the transformer, the intake fan 202 drives external air from the intake chamber 201 into the ventilation duct 2, enabling the cold air to flow rapidly within the ventilation duct 2. The ventilation duct 2 clamps and fixes the transformer body 1 from the front and back, while the upper air duct 203 presses the transformer body 1 from the top. This improves the installation stability of the transformer body 1, while the cold air flow in the ventilation duct 2 effectively prevents the heat generated by the transformer body 1 from being transferred to the outer casing 101, effectively avoiding burns to the outer casing 101 due to high temperature, and thus effectively improving the safety of the transformer in use.

[0034] Please see Figures 2 to 6An upper air duct 203 is fixedly connected between the tops of the two ventilation ducts 2. The upper air duct 203 contacts the top of the transformer body 1 and presses the transformer coil body tightly to improve the fixing effect. At the same time, the upper air duct 203 isolates the heat generated by the transformer body 1 from being transferred to the top of the outer casing 101. An air outlet 204 is opened in the middle of the bottom end of the upper air duct 203. Some of the cold air flow in the ventilation duct 2 enters the upper air duct 203 and is then blown towards the transformer body 1 from the air outlet 204, mainly towards the circuit board part of the transformer body 1. A hot air outlet 205 is opened at the end of each of the two ventilation ducts 2 near the left end plate 102. The two sets of hot air outlets 205 are arranged facing each other, and the hot air after heat exchange with the transformer body 1 is... The hot air returns from the hot air outlet 205 into the ventilation duct 2. The hot air mixes with the remaining cold air in the ventilation duct 2, thereby effectively reducing the temperature of the blown hot air, effectively preventing safety accidents caused by the blown high-temperature hot air, and effectively improving the safety of the transformer. The upper air duct 203 is T-shaped. The lower end of the connection between the upper air duct 203 and the ventilation duct 2 is fixedly connected to the air guide arc 206. The air guide arc 206 extends into the ventilation duct 2 and slides to connect with the inner wall of the ventilation duct 2. By using the air guide arc 206 to guide the cold air flow in the ventilation duct 2 into the upper air duct 203, a guide plate 207 is fixedly connected to the upper end of the air outlet 204 near the left end plate 102. The height of the guide plate 207 is less than the internal height of the upper air duct 203.

[0035] The cold airflow in the ventilation duct 2 is guided to the upper air duct 203 by the air-guiding arc plate 206, so that part of the cold airflow in the ventilation duct 2 enters the upper air duct 203. The remaining cold airflow in the ventilation duct 2 continues to move towards the left end plate 102. The cold airflow that enters the upper air duct 203 is blown towards the transformer body 1 from the air outlet 204 to cool the transformer body 1. The hot air after heat exchange with the transformer body 1 returns to the ventilation duct 2 from the hot air outlet 205. The hot air mixes with the remaining part of the cold air in the ventilation duct 2, thereby effectively reducing the temperature of the blown hot air and effectively preventing safety accidents caused by the blown high temperature hot air, and further effectively improving the safety of the transformer.

[0036] Second implementation method:

[0037] Compared to the first embodiment, the main additions are a rotating shaft 3, a wind turbine 301, and a spiral wind turbine 302. The specific additions are as follows, while the remaining structures are the same as in the first embodiment.

[0038] Please see Figure 2 , Figure 4 , Figure 7 , Figure 8 and Figure 9A rotating shaft 3 is rotatably connected to the middle of the hot air outlet 205. One end of the rotating shaft 3, extending into the ventilation duct 2, is fixedly connected to a fan wheel 301, and the other end of the rotating shaft 3 is equipped with a spiral fan wheel 302. The remaining cold airflow in the ventilation duct 2 blows the fan wheel 301, thereby driving the spiral fan wheel 302 to rotate via the rotating shaft 3. This drives hot air through the hot air outlet 205 into the ventilation duct 2, achieving mixing of hot and cold air, effectively reducing the final transformer exhaust temperature. The rotating shaft 3 and the spiral fan wheel 302 are slidably connected. An outer cylinder 303 is fixedly connected to the outside of the hot air outlet 205. A sealing cover 304 is fixedly connected to the end of the spiral fan wheel 302 away from the hot air outlet 205. The sealing cover 304 is in close contact with the outer port of the outer cylinder 303. 04 The tight cover of the outer extension cylinder 303 seals the hot air outlet 205, effectively preventing external dust from entering the transformer from the hot air outlet 205 when the transformer is in a shutdown state, thus preventing dust from contaminating the transformer body 1. A fixing ring 305 is fixedly connected to the middle of the rotating shaft 3. A linkage rod 306 is hinged between the fixing ring 305 and the spiral impeller 302. A tension spring 307 is rotatably connected between the fixing ring 305 and the spiral impeller 302. During the rotation of the rotating shaft 3, the rotating shaft 3 drives the linkage rod 306 in advance, causing the linkage rod 306 to rotate and straighten first, and then drive the spiral impeller 302 to rotate. Due to the straightening of the linkage rod 306, the spiral impeller 302 drives the sealing cover 304 away from the outer extension cylinder 303, thereby opening the hot air outlet 205.

[0039] The cold airflow in the ventilation duct 2 blows the fan wheel 301, causing the rotating shaft 3 to rotate and drive the spiral fan wheel 302. The spiral fan wheel 302 drives the hot air into the ventilation duct 2 through the hot air inlet 205, mixing the hot and cold air to effectively reduce the temperature of the final transformer exhaust. During the rotation of the rotating shaft 3, the rotating shaft 3 first drives the linkage rod 306, and then drives the spiral fan wheel 302 to rotate. Before the spiral fan wheel 302 rotates, it pushes the sealing cover 304 away from the outer cylinder 303, thereby opening the hot air inlet 205.

[0040] Please see Figure 7 A drive shaft 308 is fixedly connected between the two rotating shafts 3. A dual-output shaft motor 309 is fixedly connected to the bottom of the upper air duct 203. The dual-output shaft motor 309 is fixedly connected to the drive shaft 308. The dual-output shaft motor 309 drives the drive shaft 308, which further improves the rotation capability of the rotating shaft 3. This effectively helps the cold airflow in the ventilation duct 2 to blow the fan wheel 301, and effectively avoids the problem that the cold airflow in the ventilation duct 2 will reduce its ability to blow the fan wheel 301 due to insufficient wind speed.

[0041] Please see Figure 10The outer side of the sealing cover 304 has a connecting groove 310. A shielding diaphragm 311 is fixedly connected to one end of the connecting groove 310. The shielding diaphragm 311 is curved towards the outer extension cylinder 303 and is made of elastic plastic. The connecting groove 310 effectively increases the flow space of the hot air outlet 205, making it easier for hot air to enter the ventilation duct 2. When the sealing cover 304 tightly covers the outer extension cylinder 303, the originally curved shielding diaphragm 311 returns to flat after contacting the outer extension cylinder 303, thereby sealing the connecting groove 310.

[0042] The above description is merely a preferred embodiment of the present invention; it encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A high-safety vehicle-mounted miniature transformer, comprising a transformer body (1) and a housing (101) fixedly connected to the outside of the transformer body (1), characterized in that: The outer shell (101) is fixedly connected to a left end plate (102) and a right end plate (103) at both ends. Ventilation ducts (2) are fixedly connected between the two ends of the left end plate (102) and the right end plate (103). The two ventilation ducts (2) clamp the front and rear ends of the transformer body (1). An air inlet chamber (201) is fixedly connected between the ends of the two ventilation ducts (2) near the right end plate (103). An air inlet fan (202) is fixedly connected inside the air inlet chamber (201). An upper air duct (203) is fixedly connected between the tops of the two ventilation ducts (2). The upper air duct (203) contacts the top of the transformer body (1), and an air outlet (204) is opened in the middle of the bottom end of the upper air duct (203). A hot air outlet (205) is opened at the end of each of the two ventilation ducts (2) near the right end plate (103), and the two sets of hot air outlets (205) are arranged facing each other.

2. The high-safety vehicle-mounted miniature transformer according to claim 1, characterized in that: The upper air duct (203) is T-shaped. The lower end of the connection between the upper air duct (203) and the ventilation duct (2) is fixedly connected to an air-guiding arc plate (206). The air-guiding arc plate (206) extends into the ventilation duct (2) and slides to connect with the inner wall of the ventilation duct (2).

3. The high-safety vehicle-mounted miniature transformer according to claim 1, characterized in that: A guide plate (207) is fixedly connected to the upper end of the air outlet (204) near the left end plate (102). The height of the guide plate (207) is less than the internal height of the upper air duct (203).

4. A high-safety vehicle-mounted miniature transformer according to claim 1, characterized in that: The hot air inlet (205) is rotatably connected to a rotating shaft (3). One end of the rotating shaft (3) that extends into the ventilation duct (2) is fixedly connected to a fan wheel (301), and the other end of the rotating shaft (3) is provided with a spiral fan wheel (302).

5. A high-safety vehicle-mounted miniature transformer according to claim 4, characterized in that: The rotating shaft (3) is slidably connected to the spiral impeller (302), and an extension cylinder (303) is fixedly connected to the outside of the hot air outlet (205). A sealing cover (304) is fixedly connected to one end of the spiral impeller (302) away from the hot air outlet (205), and the sealing cover (304) is in close contact with the outer port of the extension cylinder (303).

6. A high-safety vehicle-mounted miniature transformer according to claim 4, characterized in that: A fixing ring (305) is fixedly connected to the middle of the rotating shaft (3), and a linkage rod (306) is hinged between the fixing ring (305) and the spiral impeller (302). A tension spring (307) is rotatably connected between the fixing ring (305) and the spiral impeller (302).

7. A high-safety vehicle-mounted miniature transformer according to claim 4, characterized in that: A drive shaft (308) is fixedly connected between the two rotating shafts (3), and a dual-output shaft motor (309) is fixedly connected to the bottom of the upper air duct (203). The dual-output shaft motor (309) is fixedly connected to the drive shaft (308).

8. A high-safety vehicle-mounted miniature transformer according to claim 5, characterized in that: The outer side of the closed cover (304) is provided with a connecting groove (310), and a shielding membrane (311) is fixedly connected to one end of the inner side of the connecting groove (310).

9. A high-safety vehicle-mounted miniature transformer according to claim 8, characterized in that: The shielding diaphragm (311) is curved toward the outer extension cylinder (303) and the shielding diaphragm (311) is made of elastic plastic.

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