Fixing device for switch tube and switch tube assembly

Abstract

The present invention discloses a fixing device for a switch tube and a switch tube assembly, wherein the fixing device comprises a fixing seat, wherein the fixing seat is used to be installed between a PCB board and a radiator, wherein the fixing seat has a first side facing the radiator, and wherein the first side of the fixing seat has a fixing groove for installing the switch tube; and a fixing spring sheet, wherein the fixing spring sheet is connected to the fixing seat, wherein the fixing spring sheet has an abutting portion, wherein the abutting portion is located in the fixing groove, wherein the abutting portion is located between the switch tube and the fixing seat and abuts against the switch tube, and wherein the abutting portion of the fixing spring sheet is used to abut the switch tube against the radiator. The fixing device of the present invention can replace the method of fixing the switch tube and the radiator together with screws by arranging the fixing groove and the fixing spring sheet on the fixing seat, thereby greatly improving the versatility.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to a fixing device for a switch tube and a switch tube assembly. Background Art

[0002] With the development of basic sciences such as materials science, electronic information technology, and packaging technology, switch tubes (such as IGBT devices or MOS tubes) are gradually replaced by discrete switch tubes (such as IGBT devices) due to price, performance, and other reasons. They are widely used in switching power supplies and photovoltaic inverters. However, in actual applications, the installation and fixation of switch tubes (such as IGBT devices) affects the performance and reliability of switch tubes (such as IGBT devices), and thus affects the quality of the product.

[0003] For some high-power occasions, the natural heat dissipation and radiation heat dissipation of the switch tube (such as IGBT device) itself can no longer meet the heat dissipation requirements of the switch tube (such as IGBT device), and it is often necessary to install a heat sink for the switch tube (such as IGBT device) to increase the heat dissipation area of ​​the module for auxiliary heat dissipation. For the installation and fixation between the switch tube (such as IGBT device) and the heat sink, the traditional method often directly uses the screw holes of the switch tube module (such as IGBT module) itself to fix it directly. However, this traditional installation method requires screw holes to be set on the switch tube module and the heat sink. For some switch tubes (such as IGBT devices) that do not have screw holes themselves, this method cannot fix them. Therefore, the existing switch tube assembly method is poor in versatility. Summary of the invention

[0004] The invention discloses a fixing device for a switch tube and a switch tube assembly, which solves the problem of poor versatility of the assembly method of the switch tube in the prior art.

[0005] According to one aspect of the present invention, a fixing device for a switch tube is disclosed, comprising: a fixing seat, the fixing seat is used to be installed between a PCB board and a heat sink, the fixing seat has a first side facing the heat sink, and the first side of the fixing seat has a fixing groove for installing the switch tube; a fixing spring sheet, the fixing spring sheet is connected to the fixing seat, the fixing spring sheet has an abutment portion, the abutment portion is located in the fixing groove, the abutment portion is located between the switch tube and the fixing seat and abuts against the switch tube, and the abutment portion of the fixing spring sheet is used to abut the switch tube against the heat sink.

[0006] Furthermore, an adjustment hole is provided on the fixing seat, and the fixing device also includes an adjustment bolt matching the adjustment hole, the adjustment hole is threadedly matched with the adjustment bolt, and one end of the adjustment bolt abuts against the fixing spring sheet.

[0007] Furthermore, the fixing spring sheet has a mounting portion connected to the abutting portion, the adjusting bolt abuts against the mounting portion, and the adjusting bolt deforms by abutting against the mounting portion to drive the abutting portion to deform.

[0008] Furthermore, a supporting protrusion is provided in the fixing groove, and when the switch tube is installed, the switch tube abuts against the supporting protrusion; a spacing space for accommodating the abutting portion is formed between the switch tube and the bottom of the fixing groove.

[0009] Furthermore, a mounting groove is also provided on the fixing seat, and the mounting groove is adjacent to and connected to the fixing groove; the fixing spring sheet has a mounting portion connected to the abutting portion, the mounting portion is fixed in the mounting groove, and the abutting portion is located in the fixing groove.

[0010] Furthermore, the fixing spring piece is snap-connected with the fixing seat.

[0011] Furthermore, the fixing spring sheet includes a mounting portion, and a buckle is provided on the fixing seat, and the buckle is engaged with an edge of the mounting portion.

[0012] Furthermore, an avoidance groove is provided on the edge of the mounting portion, the position of the avoidance groove corresponds to the position of the buckle, and the avoidance groove is used to avoid the buckle during the installation and removal of the fixed spring sheet.

[0013] Furthermore, the fixing spring sheet further comprises a supporting portion, a first end of the supporting portion is used to abut against the radiator, and a second end of the supporting portion is arranged corresponding to the adjusting bolt.

[0014] Furthermore, the fixed spring piece also has a mounting portion, the supporting portion, the mounting portion and the abutting portion are connected in sequence, a supporting structure is formed at the connection between the supporting portion and the mounting portion, the adjusting bolt drives the abutting portion to deform by rotating, and the abutting portion deforms with the supporting structure as a supporting point during the deformation process.

[0015] Furthermore, the fixing base has a second side facing the PCB board, and the adjustment hole passes through from the second side of the fixing base to the first side of the fixing base.

[0016] Furthermore, a reinforcing rib is provided on the outer wall of the second side of the fixing seat, the reinforcing rib is used for limiting cooperation with the PCB board, and the adjustment hole passes through the reinforcing rib.

[0017] According to another aspect of the present invention, a switch tube assembly is disclosed, comprising the above-mentioned fixing device.

[0018] Furthermore, the switch tube assembly also includes a PCB board, a switch tube and a radiator arranged in sequence, the fixing device is arranged between the PCB board and the switch tube; the fixing seat is arranged between the PCB board and the radiator, the switch tube is arranged in the fixing groove, the abutting portion of the fixing spring abuts on the switch tube, and the fixing spring abuts the switch tube on the radiator through the abutting portion.

[0019] The fixing device of the present invention is provided with a fixing groove on the fixing seat. During installation, the distance between the switch tube and the PCB board is fixed by installing the switch tube in the fixing groove, so that the switch tube can be installed on the PCB board more conveniently and accurately. At the same time, the abutting portion of the fixing spring is located between the fixing seat and the switch tube and abuts against the switch tube, so that the switch tube abuts against the heat sink to achieve a tight fit. This structure can replace the method of fixing the switch tube and the heat sink together with screws, which can greatly improve the versatility. In addition, it can also avoid direct contact between the switch tube such as IGBT device and the screw, effectively prevent the occurrence of damage to the device due to improper human operation, and reduce or even basically eliminate the risk of damaging the switch tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of a fixing device according to an embodiment of the present invention;

[0021] Figure 2 is a schematic structural diagram of a fixing base according to an embodiment of the present invention;

[0022] Figure 3 is an exploded view of a fixing device according to an embodiment of the present invention;

[0023] Figure 4 is an assembly diagram of a fixing device according to an embodiment of the present invention;

[0024] Figure 5 is a three-dimensional diagram of a fixing device according to an embodiment of the present invention;

[0025] Legend: 10. Fixing seat; 11. Adjustment hole; 111. Reinforcing rib; 12. Fixing slot; 121. Supporting protrusion; 13. Mounting slot; 131. Buckle; 20. Fixing spring; 21. Abutment portion; 22. Mounting portion; 221. Avoidance slot; 23. Support portion; 30. Adjusting bolt; 40. PCB board; 41. Limiting slot; 50. Radiator; 60. Switching tube. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the embodiments, but is not limited to the contents of the description.

[0027] like Figures 1 to 5As shown, the present invention discloses a fixing device for a switch tube, including a fixing seat 10 and a fixing spring 20. The fixing seat 10 is used to be installed between a PCB board 40 and a radiator 50. The fixing seat 10 has a first side facing the radiator 50. The first side of the fixing seat 10 has a fixing groove 12 for installing a switch tube 60. The fixing spring 20 is connected to the fixing seat 10. The fixing spring 20 has an abutting portion 21. The abutting portion 21 is located in the fixing groove 12. The abutting portion 21 is located between the switch tube 60 and the fixing seat 10 and abuts on the switch tube 60. The abutting portion 21 of the fixing spring 20 is used to abut the switch tube 60 on the radiator 50.

[0028] The fixing device of the present invention is provided with a fixing groove 12 on the fixing seat 10. During installation, the distance between the switch tube 60 and the PCB board 40 is fixed by installing the switch tube 60 in the fixing groove 12, so that the switch tube can be installed on the PCB board 40 more conveniently and accurately. At the same time, the abutting portion 21 of the fixing spring 20 is located between the fixing seat 10 and the switch tube 60 and abuts against the switch tube 60, so that the switch tube 60 abuts against the heat sink 50 to achieve a tight fit. This structure can replace the method of fixing the switch tube 60 and the heat sink 50 together with screws, which can greatly improve the versatility. In addition, it can also avoid direct contact between the switch tube such as the IGBT device and the screw, effectively prevent the device from being damaged due to improper human operation, and reduce or even basically eliminate the risk of damaging the switch tube.

[0029] In the above embodiment, the fixing seat 10 is provided with an adjustment hole 11, and the fixing device further includes an adjustment bolt 30 matched with the adjustment hole 11, the adjustment hole 11 is threadedly matched with the adjustment bolt 30, and one end of the adjustment bolt 30 abuts against the fixing spring 20. When in use, the adjusting bolt 30 is rotated to push the fixing spring 20 to move, so that the switch tube 60 is pressed against the radiator 50 by the fixing spring 20. The fixing device of the present invention cooperates with the adjustment hole 11 and the adjustment bolt 30, and the position of the fixing spring 20 can be adjusted by the adjustment bolt 30, so that the fixing spring 20 squeezes and fixes the switch tube 60, thereby replacing the direct fixing method of the screw, and improving the versatility. Since the fixing spring 20 also has a certain elasticity, it can play a certain buffering role, thereby avoiding the situation where the screw directly damages the device due to improper human operation.

[0030] In the above embodiment, the fixing spring 20 has a mounting portion 22 connected to the abutting portion 21, and the adjusting bolt 30 abuts against the mounting portion 22. The adjusting bolt 30 deforms by abutting against the mounting portion 22 to drive the abutting portion 21 to deform. The fixing device of the present invention rotates the adjusting bolt 30 so that the adjusting bolt 30 can move up and down along the adjusting hole 11. During the movement, the adjusting bolt 30 abuts against the mounting portion 22 to deform, thereby driving the abutting portion 21 to deform. After the abutting portion 21 is deformed, it can abut against the switch tube 60, pressing the switch tube 60 against the radiator 50.

[0031] In the above embodiment, a support protrusion 121 is provided in the fixing groove 12, and when the switch tube 60 is installed, the switch tube 60 abuts against the support protrusion 121; a spacing space for accommodating the abutting portion 21 is formed between the switch tube 60 and the bottom of the fixing groove 12. The fixing device of the present invention is provided with the support protrusion 121, so that when installed, the switch tube 60 can abut against the support protrusion 121, and the support protrusion 121 raises the switch tube 60 to a certain height, so that the switch tube 60 can just fit on the heat sink 50. At the same time, a spacing space is formed between the switch tube 60 and the bottom of the fixing groove 12, which can facilitate the placement of the abutting portion 21, and facilitate installation and operation.

[0032] In the above embodiment, the fixing seat 10 is further provided with a mounting groove 13, which is adjacent to and connected to the fixing groove 12; the fixing spring 20 has a mounting portion 22 connected to the abutment portion 21, the mounting portion 22 is fixed in the mounting groove 13, and the abutment portion 21 is located in the fixing groove 12. By providing the mounting groove 13, the fixing spring 20 of the fixing device of the present invention can be installed in the mounting groove 13, so that the overall structure of the fixing device is more compact and convenient for installation and maintenance.

[0033] In the above embodiment, the fixing spring piece 20 is snap-fitted with the fixing seat 10, which is convenient for installation and removal. Specifically, the fixing spring piece 20 includes a mounting portion 22, and a buckle 131 is provided on the fixing seat 10, and the buckle 131 is snap-fitted with the edge of the mounting portion 22. The fixing device of the present invention is provided with the buckle 131, and when in use, after the mounting portion 22 is mounted on the fixing seat 10, the buckle 131 can clamp the edge of the mounting portion 22, thereby achieving limited fit, avoiding the use of bolts for installation, and being convenient and quick.

[0034] In the above embodiment, the edge of the mounting portion 22 is provided with an avoidance groove 221, the position of the avoidance groove 221 corresponds to the position of the buckle 131, and the avoidance groove 221 is used to avoid the buckle 131 during the installation and removal of the fixing spring piece 20. The fixing device of the present invention is provided with the avoidance groove 221, during the installation process of the mounting portion 22, one side can be tilted to be placed into the buckle 131, and the other side can avoid the corresponding buckle 131 through the avoidance groove 221, so as to smoothly enter the buckle 131, and when the mounting portion 22 is laid flat, both sides can be engaged with the buckle 131. This installation method can avoid the wear of the buckle 131 and improve the service life and reliability.

[0035] In the above embodiment, the fixing spring piece 20 further has a supporting portion 23, a first end of the supporting portion 23 is used to abut against the radiator 50, and a second end of the supporting portion 23 is arranged corresponding to the adjusting bolt 30. The fixing device of the present invention can fix the fixing spring piece 20 on the fixing seat 10 by providing the supporting portion 23, thereby improving the reliability of the fixing spring piece 20.

[0036] In the above embodiment, the fixing spring piece 20 also has a mounting portion 22, and the support portion 23, the mounting portion 22 and the abutment portion 21 are connected in sequence. The support portion 23 and the mounting portion 22 form a support structure at the connection point. The adjusting bolt 30 drives the abutment portion 21 to deform by rotating, and the abutment portion 21 deforms with the support structure as the supporting point during the deformation process. The fixing device of the present invention can fix the fixing spring piece 20 as a whole between the fixing seat 10 and the radiator 50 through the support portion 23 by setting the support portion 23, the mounting portion 22 and the abutment portion 21, and the support portion 23 and the mounting portion 22 form a support structure at the connection point. The adjusting bolt 30 drives the abutment portion 21 to deform by rotating, and the abutment portion 21 deforms with the support structure as the supporting point during the deformation process. When the adjusting bolt 30 rotates in the direction, the abutment portion 21 can return to its original state through the supporting point, making the fixing spring piece 20 as a whole more reliable and firm.

[0037] In the above embodiment, the fixing seat 10 has a second side facing the PCB board 40, and the adjustment hole 11 passes through the second side of the fixing seat 10 to the first side of the fixing seat 10. Specifically, a reinforcing rib 111 is provided on the outer wall of the second side of the fixing seat 10, and the reinforcing rib 111 is used to limit the PCB board 40, and the adjustment hole 11 passes through the reinforcing rib 111. The PCB board 40 is provided with an assembly hole, and a limiting groove is provided in the circumferential direction of the assembly hole. The adjustment hole 11 itself is provided protruding from the second side surface of the fixing seat 10. During assembly, the adjustment hole 11 cooperates with the assembly hole, and the reinforcing rib 111 cooperates with the limiting groove, thereby realizing circumferential limiting, improving the reliability of installation, and at the same time preventing the fixing seat 10 from rotating relative to the PCB board 40, reducing the difficulty of assembly.

[0038] According to another embodiment of the present invention, a switch tube assembly is also disclosed, comprising the above-mentioned fixing device.

[0039] In this embodiment, the switch tube 60 assembly also includes a PCB board 40, a switch tube 60 and a heat sink 50 which are arranged in sequence, and the fixing device is arranged between the PCB board 40 and the switch tube 60; the fixing seat 10 is arranged between the PCB board 40 and the heat sink 50, the switch tube 60 is arranged in the fixing groove 12, and the abutting portion 21 of the fixing spring 20 abuts on the switch tube 60, and the fixing spring 20 abuts the switch tube 60 on the heat sink 50 through the abutting portion 21.

[0040] It should be noted that the switch tube 60 in the present invention includes an IGBT device or a MOS tube, and may also be other power devices.

[0041] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the embodiments here. Any obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A fixing device for a switch tube, characterized in that: include: A fixing seat (10), the fixing seat (10) being used to be installed between a PCB board (40) and a heat sink (50), the fixing seat (10) having a first side facing the heat sink (50), and the first side of the fixing seat (10) having a fixing groove (12) for installing a switch tube (60); a fixing spring sheet (20), the fixing spring sheet (20) being connected to the fixing seat (10), the fixing spring sheet (20) having an abutting portion (21), the abutting portion (21) being located in the fixing groove (12), the abutting portion (21) being located between the switch tube (60) and the fixing seat (10) and abutting against the switch tube (60), the abutting portion (21) of the fixing spring sheet (20) being used to abut the switch tube (60) against the heat sink (50); The fixing seat (10) is provided with an adjustment hole (11), and the fixing device further comprises an adjustment bolt (30) matched with the adjustment hole (11), the adjustment hole (11) and the adjustment bolt (30) are threadedly matched, one end of the adjustment bolt (30) abuts against the fixing spring sheet (20), the fixing spring sheet (20) has a mounting portion (22) connected to the abutting portion (21), the adjustment bolt (30) abuts against the mounting portion (22), and the adjustment bolt (30) deforms by abutting against the mounting portion (22) to drive the abutting portion (21) to deform.

2. The fixing device according to claim 1, characterized in that: A supporting protrusion (121) is provided in the fixing groove (12), and when the switch tube (60) is installed, the switch tube (60) abuts against the supporting protrusion (121); A spacing space for accommodating the abutment portion (21) is formed between the switch tube (60) and the bottom of the fixing groove (12).

3. The fixing device according to claim 1, characterized in that: The fixing seat (10) is also provided with a mounting groove (13), and the mounting groove (13) is arranged adjacent to and communicates with the fixing groove (12); The fixing spring sheet (20) has a mounting portion (22) connected to the abutting portion (21); the mounting portion (22) is fixed in the mounting groove (13); and the abutting portion (21) is located in the fixing groove (12).

4. The fixing device according to claim 1, characterized in that: The fixing spring sheet (20) is clamped with the fixing seat (10).

5. The fixing device according to claim 4, characterized in that: The fixing spring sheet (20) comprises a mounting portion (22), and a buckle (131) is provided on the fixing seat (10), and the buckle (131) is engaged with the edge of the mounting portion (22).

6. The fixing device according to claim 5, characterized in that: An avoidance groove (221) is provided on the edge of the mounting portion (22), the position of the avoidance groove (221) corresponds to the position of the buckle (131), and the avoidance groove (221) is used to avoid the buckle (131) during the installation and removal process of the fixed spring sheet (20).

7. The fixing device according to claim 1, characterized in that: The fixing spring sheet (20) further comprises a supporting portion (23), a first end of the supporting portion (23) being used to abut against the radiator (50), and a second end of the supporting portion (23) being arranged corresponding to the adjusting bolt (30).

8. The fixing device according to claim 7, characterized in that: The fixing spring sheet (20) further comprises a mounting portion (22); the supporting portion (23), the mounting portion (22) and the abutting portion (21) are connected in sequence; a supporting structure is formed at the connection between the supporting portion (23) and the mounting portion (22); the adjusting bolt (30) drives the abutting portion (21) to deform by rotating; and the abutting portion (21) deforms with the supporting structure as a supporting point during the deformation process.

9. The fixing device according to claim 1, characterized in that: The fixing seat (10) has a second side facing the PCB board (40), and the adjustment hole (11) penetrates from the second side of the fixing seat (10) to the first side of the fixing seat (10).

10. The fixing device according to claim 8, characterized in that: A reinforcing rib (111) is provided on the outer wall of the second side of the fixing seat (10), the reinforcing rib (111) is used for limiting cooperation with the PCB board (40), and the adjustment hole (11) passes through the reinforcing rib (111).

11. A switch tube assembly, characterized in that: A fixing device comprising the fixing device according to any one of claims 1 to 10.

12. The switch tube assembly according to claim 11, characterized in that: The switch tube (60) assembly further comprises a PCB board (40), a switch tube (60) and a heat sink (50) which are arranged in sequence, and the fixing device is arranged between the PCB board (40) and the switch tube (60); The fixing seat (10) is arranged between the PCB board (40) and the heat sink (50), the switch tube (60) is arranged in the fixing groove (12), the abutting portion (21) of the fixing spring sheet (20) abuts against the switch tube (60), and the fixing spring sheet (20) abuts the switch tube (60) against the heat sink (50) via the abutting portion (21).

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