A three-phase bridge rectifier

Abstract

The application belongs to the technical field of rectifiers, and particularly relates to a three-phase bridge rectifier which comprises a heat dissipation base, fins are fixed to the heat dissipation base, and further comprises a base, the cross section of the base is in the shape of a concave letter, electrode ports are arranged on the left and right sides of the base, a water tank is arranged on the base, a wire mesh is installed in the water tank, and circuit elements of the rectifier are fixed to the wire mesh; the wire mesh is made of stainless steel material; the base is made of heat-conducting silicone grease; preferably, distilled water is added into the water tank; the circuit elements are all placed in water, and distilled water is used as a heat exchange medium, so that the circuit elements can be quickly cooled, the influence of heat generation of the circuit elements on the wiring position of the electrode ports can be reduced, the cooling effect can be improved, the risk of wire melting caused by overheating of the wiring position and short circuit can be avoided, and the safety performance and service life of the rectifier are improved.

Description

Technical Field

[0001] This invention belongs to the field of rectifier technology, specifically relating to a three-phase bridge rectifier. Background Technology

[0002] A rectifier is a device that converts alternating current (AC) to direct current (DC). It can be used in power supply systems and for detecting radio signals. Rectifiers can be made from vacuum tubes, ignition tubes, solid-state silicon semiconductor diodes, mercury arc diodes, etc. Simply put, a rectifier is a device that converts AC to DC. It has two main functions: first, to convert AC to DC, which is then filtered and supplied to the load or inverter; second, to provide charging voltage to the battery. Therefore, it also functions as a charger. A three-phase rectifier bridge is a complete rectifier circuit formed by encapsulating several rectifier diodes in a single housing.

[0003] Three-phase rectifier bridges typically have a relatively simple structure. Several rectifier tubes are encapsulated in non-metallic insulating material, connected according to the principle, and electrodes are extended outward to form a rectifier circuit. Once connected to a circuit, the rectifier bridge function can be realized. Some also add a heat sink base to achieve cooling through air cooling. However, the existing cooling methods are relatively ineffective. After the rectifier bridge has been used for a certain period of time, the terminals usually melt due to high temperature. In mild cases, they may be fused to the fixing bolts, and in severe cases, they may melt and cause short circuits and electric shock hazards.

[0004] In view of this, the present invention is proposed to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a three-phase bridge rectifier. The specific problem to be solved by this invention is that the existing three-phase rectifier bridge has a relatively poor cooling effect. After the rectifier bridge has been used for a certain period of time, the terminals usually melt due to high temperature. In mild cases, it will be fused to the fixing bolts, and in severe cases, it will melt and cause short circuit and electric shock hazards.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A three-phase bridge rectifier includes a heat sink base, wherein fins are fixedly connected to the heat sink base, and further includes:

[0008] The base has a U-shaped cross section, electrode openings on the left and right sides, a water tank on the base, a wire mesh installed in the water tank, and circuit components of a rectifier fixed to the wire mesh.

[0009] The wire mesh is made of stainless steel.

[0010] The base is made of thermally conductive silicone grease.

[0011] Preferably, distilled water is added to the water tank.

[0012] Preferably, the three-phase bridge rectifier further includes:

[0013] The water pipe, which forms a sealed loop with the water tank through two connecting pipes at the front and rear, has its portion located below the heat dissipation base inserted between the fins and in contact with the surface of the fins.

[0014] Preferably, the water pipe is made of brass.

[0015] Preferably, the height of the connecting pipe at the front end of the water pipe is higher than that at the rear end of the water pipe, and a check valve is installed on the connecting pipe at the front end of the water pipe.

[0016] The total amount of distilled water added to the water pipe and water tank must be sufficient to ensure that there is no distilled water in the connecting pipe at the front end of the water pipe when the rectifier is placed horizontally.

[0017] Preferably, the lowest point of the electrode port is higher than the top of the fin.

[0018] Preferably, the electrode port is designed as a countersunk hole, the external wire is fixed with bolts, and an electrode plate is fixed to the shoulder of the electrode port.

[0019] Preferably, there are five electrode ports in total, three on one side and two on the other side, and the electrode plates are respectively connected to the circuit components in the water tank.

[0020] Preferably, the base above the water tank is designed as a detachable cover plate, which can be detachably connected by bolts.

[0021] Preferably, the cover plate is designed with a water inlet.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. This invention involves immersing all circuit components in water and using distilled water as the heat exchange medium. This helps the circuit components dissipate heat quickly. Compared to existing rectifier heat dissipation methods, this invention disperses the heat generated by the circuit components in the water, reducing the impact of the circuit components' heat generation on the electrode connection points. It also improves the heat dissipation effect, thereby avoiding the risk of wire melting due to overheating at the connection points and causing short circuits. This improves the safety performance and service life of the rectifier.

[0024] 2. By setting up the water circuit, the distilled water can be automatically circulated to increase the heat dissipation effect when the temperature is too high, and automatically stop when the temperature drops. Moreover, the circulation of distilled water does not require additional energy, thus achieving the optimization of structure and energy consumption. Attached Figure Description

[0025] Figure 1This is a perspective view of the present invention;

[0026] Figure 2 This is the left view of the present invention;

[0027] Figure 3 This is a top view of the present invention;

[0028] Figure 4 For the present invention Figure 3 A sectional view of section AA;

[0029] Figure 5 This is a top view structural diagram of the present invention;

[0030] Figure 6 This is the front view of the present invention;

[0031] Figure 7 This is a schematic diagram of the main view structure of the present invention.

[0032] In the diagram: 1. Heat sink base, 11. Fins, 2. Base, 21. Water tank, 211. Cover plate, 212. Water inlet, 212. Wire mesh, 22. Circuit components, 23. Electrode port, 31. Electrode plate, 4. Water pipe, 41. Connecting pipe, 42. Check valve. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0034] This invention provides a three-phase bridge rectifier that solves the technical problem of existing three-phase rectifier bridges having relatively poor cooling performance. After a certain period of use, the terminals often melt due to high temperatures, which can lead to fusion with the fixing bolts or even complete meltdown, causing short circuits and electric shock hazards.

[0035] The technical solution in this embodiment of the invention is to solve the above-mentioned technical problems. The general idea is as follows: by placing the circuit components as a whole in water, the heat generated by the circuit components is evenly distributed by taking advantage of the high thermal conductivity of water, thereby avoiding the heat concentration that leads to excessively high temperature.

[0036] For a better understanding of the technical solution of this invention, please refer to [link / reference]. Figures 1 to 7 In this embodiment of the invention, a three-phase bridge rectifier includes a heat sink 1, on which fins 11 are fixedly connected, and further includes:

[0037] Base 2, the upper cross section of base 2 is U-shaped, electrode openings 3 are provided on the left and right sides of base 2, water tank 21 is provided on base 2, wire mesh 22 is installed in water tank 21, and circuit elements 23 of rectifier are fixedly connected to the wire mesh 22.

[0038] Wire mesh 22 is made of stainless steel.

[0039] Base 2 is made of thermally conductive silicone grease;

[0040] Thermal grease is an insulating material with good thermal conductivity. Using thermal grease can improve the heat dissipation of the base 2 while providing insulation, and also avoids the corrosion problem that would occur if the base 2 were made of metal. This invention places the rectifier's working circuit and all components in water. When the rectifier heats up, the heat generated by the circuit components 23 is directly transferred to the water, and then some of the heat is transferred to the heat sink 1. At this point, the rectifier dissipates heat through the base 2 itself and the fins 11 structure of the heat sink 1. Water, as the heat exchange medium, has a specific heat capacity much higher than air and common metals. Therefore, it can help the circuit element 23 dissipate heat as quickly as possible. Compared with the existing rectifiers that do not have heat dissipation effect, the present invention disperses the heat generated by the circuit element 23 in the water, which can reduce the impact of the heat generated by the circuit element 23 on the wiring of the electrode port 3, and at the same time improve the heat dissipation effect, thereby avoiding the risk of short circuit caused by the melting of the wires due to overheating at the wiring, thus improving the safety performance and service life of the rectifier. The setting of the wire mesh 22 can make the circuit element 23 fully contact with the water, thereby improving the heat exchange effect. The wire mesh 22 is made of stainless steel, which can prevent the wire mesh 22 from rusting and aging.

[0041] In one embodiment of the present invention, distilled water is added to the water tank 21;

[0042] Distilled water is non-conductive. When circuit component 23 is damaged and leaks current, or when it melts due to excessive temperature, the distilled water can cool the circuit component 23 and also act as an insulator, keeping the damaged circuit of the rectifier in an open circuit state, thus playing a role in circuit protection.

[0043] As one embodiment of the present invention, the three-phase bridge rectifier further includes:

[0044] Water pipe 4, water pipe 4 forms a sealed loop with water tank 21 through two connecting pipes 41 at the front and rear. The part of water pipe 4 located below heat dissipation base 1 is inserted between fins 11 and contacts the surface of fins 11.

[0045] In one embodiment of the present invention, the water pipe 4 is made of brass;

[0046] In one embodiment of the present invention, the height of the connecting pipe 41 at the front end of the water pipe 4 is higher than that of the connecting pipe 41 at the rear end of the water pipe 4, and a check valve 42 is installed on the connecting pipe 41 at the front end of the water pipe 4.

[0047] The total amount of distilled water added to water pipe 4 and water tank 21 must be guaranteed so that there is no distilled water in the connecting pipe 41 at the front end of water pipe 4 when the rectifier is placed horizontally.

[0048] This invention requires horizontal installation. When the rectifier is working normally and the temperature inside the water tank 21 and water pipe 4 is normal, the base 2 and the heat dissipation fins 11 work together to dissipate heat. When the circuit containing the rectifier malfunctions, causing the temperature of the distilled water in the pre-water pipe 4 inside the water tank 21 to rise, the distilled water is heated, resulting in partial vaporization and volume expansion. Since the distilled water circuit is sealed, under pressure, the distilled water in the water tank 21 is forced into the water pipe 4. Simultaneously, the liquid level in the connecting pipe 41 at the front end of the water pipe 4 rises, and some distilled water flows into the water tank 21, thus achieving a small-scale liquid circulation. The check valve 42 ensures that the pressure of the generated water vapor acts within the water tank 21 without affecting the water flow into the connecting pipe 41. Water tank 21; when the temperature drops and the pressure of the water vapor is insufficient to drive the distilled water circulation, the circulation stops, and the base 2 and heat dissipation fins 11 once again share the heat dissipation effect; water pipes 4 are interlaced with and surface-contact with fins 11, which can improve the heat transfer effect to fins 11 during the distilled water circulation process. At the same time, water pipes 4 are made of brass, which can further improve the heat conduction effect; through the above settings, automatic water circulation is realized to improve heat dissipation when the rectifier heats up too much, and water circulation stops when the temperature drops. Moreover, the circulation of distilled water does not require additional energy, thus achieving the optimization of structure and energy consumption; the loop formed by water pipes 4 and water tank 21 is sealed, which can prevent impurities from entering, thereby ensuring the purity of distilled water and ensuring the insulation of distilled water.

[0049] In one embodiment of the present invention, the lowest point of the electrode port 3 is higher than the top of the fin 11;

[0050] This setting makes connecting external wires more convenient.

[0051] As one embodiment of the present invention, the electrode port 3 is designed as a countersunk hole, the external wire is fixed by bolts, and an electrode plate 31 is fixedly connected to the shoulder of the electrode port 3.

[0052] As one embodiment of the present invention, there are five electrode ports 3 in total, three on one side and two on the other side, and the electrode plates 31 are respectively connected to the circuit components 23 in the water tank 21.

[0053] The connection between electrode port 3 and external wires is fixed with countersunk bolts, which can improve the reliability of the connection. The internal circuit components 23 and the circuit layout adopt the traditional three-phase rectifier bridge method, and a capacitor is connected in parallel to eliminate or reduce circuit fluctuations and obtain a relatively stable DC power, thereby ensuring the reliability of the rectifier function.

[0054] In one embodiment of the present invention, the base 2 is designed as a detachable cover plate 211 above the water tank 21, which is detachably connected by bolts;

[0055] The removable cover 211 facilitates cleaning of the inside of the sink 21 and maintenance and replacement of the circuit components 23.

[0056] As one embodiment of the present invention, a water inlet 212 is designed on the cover plate 211;

[0057] Water inlet 212 is used to add distilled water into the circulating water circuit formed by water tank 21 and water pipe 4.

[0058] Working principle: When the rectifier heats up, the heat generated by the circuit element 23 is directly transferred to the water, and then some of the heat is transferred to the heat sink 1. At this time, the rectifier achieves heat dissipation through the base 2 itself and the fins 11 of the heat sink 1. When the circuit where the rectifier is located malfunctions, causing the temperature of the distilled water in the pre-water pipe 4 in the water tank 21 to rise, the distilled water is heated, causing the liquid distilled water to partially vaporize and expand in volume. Since the distilled water circuit is in a sealed state, under the action of pressure, the distilled water in the water tank 21 is forced into the water pipe 4. At the same time, the liquid level in the connecting pipe 41 at the front end of the water pipe 4 rises, and some distilled water flows into the water tank 21, thereby achieving a small-scale liquid circulation. The check valve 42 ensures that the pressure of the generated water vapor acts on the water tank 21 without affecting the water flow into the water tank 21 from the front connecting pipe 41. When the temperature drops and the pressure of the generated water vapor is insufficient to drive the distilled water circulation, the circulation stops. At this time, the base 2 and the heat sink fins 11 once again jointly undertake the heat dissipation effect.

[0059] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not exist, the above embodiments only illustrate several implementation methods of the present invention. The descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention patent should be determined by the appended claims.

Claims

1. A three-phase bridge rectifier, comprising a heat sink base (1), wherein fins (11) are fixedly connected to the heat sink base (1), characterized in that: Also includes: The base (2) has a concave cross section. Electrode openings (3) are provided on the left and right sides of the base (2). A water tank (21) is provided on the base (2). A wire mesh (22) is installed in the water tank (21). A rectifier circuit element (23) is fixed on the wire mesh (22). The wire mesh (22) is made of stainless steel. The base (2) is made of thermally conductive silicone grease; The three-phase bridge rectifier also includes: Water pipe (4), the water pipe (4) forms a sealed loop with the water tank (21) through two connecting pipes (41) at the front and rear. The part of the water pipe (4) located below the heat dissipation base (1) is inserted between the fins (11) and contacts the surface of the fins (11). The height of the connecting pipe (41) at the front end of the water pipe (4) is higher than that of the connecting pipe (41) at the rear end of the water pipe (4), and a check valve (42) is installed on the connecting pipe (41) at the front end of the water pipe (4). The total amount of distilled water added to the water pipe (4) and water tank (21) must be guaranteed so that there is no distilled water in the connecting pipe (41) at the front end of the water pipe (4) when the rectifier is placed horizontally.

2. A three-phase bridge rectifier according to claim 1, characterized in that: Distilled water is added to the water tank (21).

3. A three-phase bridge rectifier according to claim 1, characterized in that: The water pipe (4) is made of brass.

4. A three-phase bridge rectifier according to claim 1, characterized in that: The lowest point of the electrode port (3) is higher than the top of the fin (11).

5. A three-phase bridge rectifier according to claim 1, characterized in that: The electrode port (3) is designed as a countersunk hole, and the external wires are fixed with bolts. An electrode plate (31) is fixed to the shoulder of the electrode port (3).

6. A three-phase bridge rectifier according to claim 5, characterized in that: There are five electrode ports (3), three on one side and two on the other side. The electrode plates (31) are respectively connected to the circuit components (23) in the water tank (21).

7. A three-phase bridge rectifier according to claim 1, characterized in that: The base (2) is located above the water tank (21) and is designed as a detachable cover plate (211), which is detachably connected by bolts.

8. A three-phase bridge rectifier according to claim 7, characterized in that: The cover plate (211) is designed with a water inlet (212).

Images