High-thermal-conductivity single-phase rectifier bridge

Abstract

The utility model discloses a high-thermal-conductivity single-phase rectifier bridge, which comprises a heat dissipation shell and a rectifier bridge body, and a placement cavity is arranged on the lower wall of the heat dissipation shell. According to the utility model, the upper wall of the rectifier bridge body abuts against the heat-conducting plate, and the heat-conducting silica gel is arranged between the rectifier bridge body and the heat-conducting plate, so that heat generated when the rectifier bridge body works can be quickly conducted to the heat-conducting plate, is diffused to the space between the heat-conducting plate and the upper wall of the inner side of the placing cavity through the heat-conducting plate, and is then diffused to the radiating fins through the outer wall of the radiating shell; the fan blades driven by the motor to rotate are arranged on the lower walls of the cooling fins, the fan blades adsorb the air below and blow the air towards the cooling fins when rotating, and the speed of conducting the heat on the cooling fins to the air is greatly increased.

Description

Technical Field

[0001] The utility model relates to the technical field of rectifier bridges, in particular to a high thermal conductivity single-phase rectifier bridge. Background Art

[0002] At present, the single-phase rectifier bridge commonly seen on the market adopts a resin packaging layer to encapsulate the rectifier bridge body and the outer shell to form an integral structure. Therefore, the rectifier bridge body can only dissipate heat through the outer shell, but the bottom of the outer shell is in close contact with the installed circuit board, resulting in that its bottom has no heat dissipation effect. Secondly, the outer wall area of ​​the outer shell is small, and the contact area with the air is small, resulting in low heat dissipation efficiency, and thus cannot meet the needs of users. For this reason, there is a public technology on the market that proposes a single-phase rectifier bridge structure that is easy to dissipate heat, including an outer heat dissipation shell, a placement groove and a rectifier bridge body, a placement groove is provided at the center of the upper surface of the outer heat dissipation shell, and a heat-conducting substrate is bonded to the inner bottom plate of the placement groove, the rectifier bridge body is provided inside the heat-conducting substrate, and a resin packaging layer is provided inside the placement groove above the rectifier bridge body. This technology increases the contact area between the outer heat dissipation shell and the air and improves its heat dissipation efficiency by opening the strip heat dissipation groove of the outer heat dissipation shell, and cooperates with the opening of the through hole to further increase the air flow rate inside the strip heat dissipation groove, thereby improving its heat dissipation efficiency. However, the bottom of the outer shell is in close contact with the installed circuit board, resulting in that its bottom has no heat dissipation effect. For this reason, there is a public technology on the market that proposes a high thermal conductivity single-phase rectifier bridge, including an outer shell and a heat dissipation plate. The heat dissipation plate is disassembled and installed on the top of the outer shell, and the heat conduction box is disassembled and connected to the bottom of the outer shell. The micro motor installed at the bottom of the heat dissipation plate is connected to the bottom end of the fan box. The micro motor is started to drive the fan box to operate to generate airflow. Part of the heat is absorbed by the heat conduction plate A and heat conducts to the heat sink for heat dissipation, and the other part of the high-temperature airflow is directly discharged through the mesh, thereby improving the thermal conductivity of the rectifier bridge.

[0003] However, in the aforementioned improved technology, the heat conduction box is not connected to the outside, so when its fan blades rotate, they only stir the internal airflow and do not play a role in heat dissipation. Instead, they increase the new heat generated when the micro motor is operating and do not play an improvement role. In summary, it is necessary to improve the single-phase rectifier bridge structure to enhance its heat dissipation effect. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a high thermal conductivity single-phase rectifier bridge.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a high thermal conductivity single-phase rectifier bridge, including a heat sink and a rectifier bridge body, the lower wall of the heat sink is provided with a placement cavity, the rectifier bridge body is arranged on the inner side wall of the placement cavity and fixed by sealant, a heat conducting structure for conducting heat to the outer wall of the heat sink shell is arranged between the rectifier bridge body and the inner upper wall of the placement cavity, the left and right side walls of the heat sink are fixedly connected with multiple groups of heat sinks, the lower walls of the multiple groups of heat sinks are fixedly connected with a fixing seat, the inner wall of the fixing seat is rotatably connected with a rotating rod through a fixing frame, the outer wall of the rotating rod is provided with a heat dissipation structure for blowing air to dissipate heat for multiple heat sinks, the top of the heat sink is fixedly connected with a motor box, the left and right side walls of the motor box are provided with belt covers, the end of the rotating rod away from the fixing frame passes through the heat sink and is rotatably connected to the lower wall of the belt cover, and the inner wall of the motor box is provided with a driving structure for driving the rotating rod to rotate.

[0006] As a further description of the above technical solution:

[0007] The heat-conducting structure includes a heat-conducting plate and two groups of support plates. The two groups of support plates are fixedly connected to the upper wall of the inner side of the cavity in the heat dissipation shell. The heat-conducting plate is fixedly connected to the lower ends of the two groups of support plates. The side of the heat-conducting plate away from the support plate is connected to the upper wall of the rectifier bridge body through heat-conducting silicone.

[0008] As a further description of the above technical solution:

[0009] The lengths of the plurality of groups of heat sinks in the left-right direction are all equal to the length of the heat sink shell in the left-right direction.

[0010] As a further description of the above technical solution:

[0011] The horizontal height of the lower surface of the fixing seat is higher than the horizontal height of the lower surface of the heat dissipation shell and the height difference is two to five millimeters.

[0012] As a further description of the above technical solution:

[0013] The driving structure is a motor, which is fixedly connected to the upper wall of the inner side of the motor box, and the end of the motor extending out of the shaft is rotatably connected to the rotating rod through a belt and a pulley.

[0014] As a further description of the above technical solution:

[0015] The heat dissipation structure is a fan blade, which is fixedly connected to the outer wall of the rotating rod and is located between the heat sink and the fixing frame.

[0016] As a further description of the above technical solution:

[0017] The front and rear side walls of the motor box are both provided with heat dissipation windows which penetrate inside and outside.

[0018] The utility model has the following beneficial effects:

[0019] 1. Compared with the prior art, the high thermal conductivity single-phase rectifier bridge has an upper wall of the rectifier bridge body abutting against the heat conduction plate, and a thermal conductive silicone is arranged between the rectifier bridge and the heat conduction plate, so that the heat generated by the rectifier bridge body during operation can be quickly conducted to the heat conduction plate and diffused through the heat conduction plate to between the heat conduction plate and the upper wall of the inner side of the placement cavity, and then diffused to the heat sink through the outer wall of the heat dissipation shell. The heat is finally conducted by the heat sink to the air near the heat sink, thereby achieving the purpose of efficient heat conduction.

[0020] 2. Compared with the prior art, the high thermal conductivity single-phase rectifier bridge has fan blades driven by a motor on the lower wall of the heat sink. When the fan blades rotate, they absorb the air below and blow it toward the heat sink, greatly improving the speed of heat conduction from the heat sink to the air. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of the high thermal conductivity single-phase rectifier bridge proposed by the utility model;

[0022] Figure 2 It is a partial cross-sectional view of the internal structure of the heat dissipation shell of the high thermal conductivity single-phase rectifier bridge proposed by the utility model;

[0023] Figure 3 The utility model provides a top view schematic diagram of the motor box and belt cover connection structure of the high thermal conductivity single-phase rectifier bridge.

[0024] Legend:

[0025] 1. Heat dissipation shell; 2. Placement cavity; 3. Rectifier bridge body; 4. Sealant; 5. Heat sink; 6. Fixed seat; 7. Fixed frame; 8. Fan blade; 9. Motor box; 10. Heat dissipation window; 11. Motor; 12. Belt cover; 13. Rotating rod; 14. Heat conduction plate; 15. Support plate. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Reference Figures 1 to 3The high thermal conductivity single-phase rectifier bridge provided by the utility model includes a heat dissipation shell 1 and a rectifier bridge body 3. The lower wall of the heat dissipation shell 1 is provided with a placement cavity 2. The rectifier bridge body 3 is arranged on the inner wall of the placement cavity 2 and fixed by a sealant 4. A heat-conducting structure for conducting heat to the outer wall of the heat dissipation shell 1 is arranged between the rectifier bridge body 3 and the inner upper wall of the placement cavity 2. The heat-conducting structure includes a heat-conducting plate 14 and two groups of support plates 15. The two groups of support plates 15 are fixedly connected to the inner upper wall of the placement cavity 2 in the heat dissipation shell 1. The heat-conducting plate 14 is fixedly connected to the lower ends of the two groups of support plates 15. The side of the heat-conducting plate 14 away from the support plate 15 is connected to the upper wall of the rectifier bridge body 3 through a heat-conducting silica gel. The heat-conducting plate 14 can use high thermal conductivity insulating ceramics commonly found on the market. When connected to the rectifier bridge body 3, the heat on the rectifier bridge body 3 can be quickly conducted to the inside of the placement cavity 2 through the heat-conducting plate 14. The heat-conducting silica gel is provided to make the contact between the heat-conducting plate 14 and the rectifier bridge body 3 closer.

[0028] Multiple groups of heat sinks 5 are fixedly connected to the left and right side walls of the heat dissipation shell 1. The lengths of the multiple groups of heat sinks 5 in the left and right directions are equal to the lengths of the heat dissipation shell 1 in the left and right directions. After the heat is conducted into the placement cavity 2, it diffuses outward through the shell of the heat dissipation shell 1. A part of the heat is diffused into the air through the front and rear side walls of the heat dissipation shell 1, and a part of the heat is diffused into the air along the multiple groups of heat sinks 5. Constraining the lengths of the multiple groups of heat sinks 5 can obtain more contact area with the air, thereby obtaining a better heat conduction effect.

[0029] The lower wall of the multiple groups of heat sinks 5 is fixedly connected with a fixing seat 6, the inner wall of the fixing seat 6 is rotatably connected with a rotating rod 13 through a fixing frame 7, and the outer wall of the rotating rod 13 is provided with a heat dissipation structure for blowing air to dissipate heat for the multiple heat sinks 5, and the top of the heat dissipation shell 1 is fixedly connected with a motor box 9, and the front and rear side walls of the motor box 9 are both provided with heat dissipation windows 10 that are through-through inside and outside, and the heat dissipation windows 10 can allow the heat generated by the motor 11 inside the motor box 9 when working to be transferred outward through the heat dissipation windows 10;

[0030] Belt covers 12 are provided on the left and right side walls of the motor box 9. One end of the rotating rod 13 away from the fixing frame 7 passes through the heat sink 5 and is rotatably connected to the lower wall of the belt cover 12. A driving structure for driving the rotating rod 13 to rotate is provided on the inner wall of the motor box 9. The driving structure is a motor 11. The motor 11 is fixedly connected to the inner upper wall of the motor box 9. The end of the motor 11 extending out of the shaft is rotatably connected to the rotating rod 13 through a belt and a pulley. The heat dissipation structure is a fan blade 8. The fan blade 8 is fixedly connected to the outer wall of the rotating rod 13 and is located between the heat sink 5 and the fixing frame 7. When the motor 11 rotates, the rotating rod 13 is driven to rotate through the belt and the pulley. When the rotating rod 13 rotates, the fan blade 8 is driven to rotate, thereby producing an effect of blowing air to the heat sink 5, thereby accelerating the speed at which the heat of the heat sink 5 is conducted to the air.

[0031] The horizontal height of the lower surface of the fixing seat 6 is higher than the horizontal height of the lower surface of the heat dissipation shell 1 and the height difference is five millimeters. By setting the fixing seat 6 to be higher than the lower surface of the heat dissipation shell 1, the lower surface of the fixing seat 6 is in a suspended state when the rectifier bridge body 3 is inserted into the circuit board, so that the room temperature air can be easily sucked in from under the fixing seat 6 when the fan blades 8 rotate.

[0032] Working principle: The heat conducting plate 14 can use the common high thermal conductivity insulating ceramics on the market. When connected to the rectifier bridge body 3, the heat on the rectifier bridge body 3 can be quickly transferred to the inside of the placement cavity 2 through the heat conducting plate 14. The heat conducting silica gel is arranged to make the contact between the heat conducting plate 14 and the rectifier bridge body 3 closer. After the heat is transferred into the placement cavity 2, it diffuses outward through the heat dissipation shell 1. A part of it diffuses into the air through the front and rear side walls of the heat dissipation shell 1, and a part of it diffuses into the air along the multiple groups of heat sinks 5. By restricting the length of the multiple groups of heat sinks 5, more contact area with the air can be obtained, thereby obtaining better In order to achieve the heat conduction effect, when the motor 11 rotates, the rotating rod 13 is driven to rotate through the belt and the pulley. When the rotating rod 13 rotates, the fan blades 8 are driven to rotate, thereby producing an effect of blowing air to the heat sink 5, thereby accelerating the speed at which the heat of the heat sink 5 is conducted to the air. By setting the fixing seat 6 to be higher than the lower surface of the heat dissipation shell 1, the lower surface of the fixing seat 6 is in a suspended state when the rectifier bridge body 3 is inserted into the circuit board, so that the room temperature air can be easily inhaled from the bottom of the fixing seat 6 when the fan blades 8 rotate. The heat dissipation window 10 can transfer the heat generated by the motor 11 inside the motor box 9 when it is working to the outside through the heat dissipation window 10.

[0033] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. High thermal conductivity single-phase rectifier bridge, characterized by: The invention comprises a heat dissipation shell (1) and a rectifier bridge body (3); the lower wall of the heat dissipation shell (1) is provided with a placement cavity (2); the rectifier bridge body (3) is arranged on the inner wall of the placement cavity (2) and fixed by a sealant (4); a heat conduction structure for conducting heat to the outer wall of the heat dissipation shell (1) is arranged between the rectifier bridge body (3) and the inner upper wall of the placement cavity (2); the left and right side walls of the heat dissipation shell (1) are fixedly connected to a plurality of groups of heat dissipation fins (5); the lower wall of the plurality of groups of heat dissipation fins (5) is fixedly connected to a fixing seat (6); the fixing seat (6 ) is rotatably connected to a rotating rod (13) via a fixing frame (7); the outer wall of the rotating rod (13) is provided with a heat dissipation structure for blowing air to dissipate heat from a plurality of heat sinks (5); a motor box (9) is fixedly connected to the top of the heat dissipation shell (1); both left and right side walls of the motor box (9) are provided with belt covers (12); one end of the rotating rod (13) away from the fixing frame (7) passes through the heat sink (5) and is rotatably connected to the lower wall of the belt cover (12); and the inner wall of the motor box (9) is provided with a driving structure for driving the rotating rod (13) to rotate.

2. The high thermal conductivity single-phase rectifier bridge according to claim 1, characterized in that: The heat conduction structure comprises a heat conduction plate (14) and two groups of support plates (15), the two groups of support plates (15) are fixedly connected to the inner upper wall of the cavity (2) placed in the heat dissipation shell (1), the heat conduction plate (14) is fixedly connected to the lower ends of the two groups of support plates (15), and the side of the heat conduction plate (14) away from the support plate (15) is connected to the upper wall of the rectifier bridge body (3) through heat conductive silica gel.

3. The high thermal conductivity single-phase rectifier bridge according to claim 1, characterized in that: The lengths of the plurality of groups of heat sinks (5) in the left-right direction are all equal to the length of the heat sink shell (1) in the left-right direction.

4. The high thermal conductivity single-phase rectifier bridge according to claim 1, characterized in that: The horizontal height of the lower surface of the fixing seat (6) is higher than the horizontal height of the lower surface of the heat dissipation shell (1) and the height difference is two to five millimeters.

5. The high thermal conductivity single-phase rectifier bridge according to claim 1, characterized in that: The driving structure is a motor (11), and the motor (11) is fixedly connected to the inner upper wall of the motor box (9). The end of the motor (11) extending out of the shaft is rotationally connected to the rotating rod (13) via a belt and a pulley.

6. The high thermal conductivity single-phase rectifier bridge according to claim 1, characterized in that: The heat dissipation structure is a fan blade (8), and the fan blade (8) is fixedly connected to the outer wall of the rotating rod (13) and is located between the heat sink (5) and the fixing frame (7).

7. The high thermal conductivity single-phase rectifier bridge according to claim 1, characterized in that: The front and rear side walls of the motor box (9) are both provided with heat dissipation windows (10) that penetrate inside and outside.

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