Two-stage LLC resonant converter

Abstract

The utility model relates to the technical field of resonant converters, and discloses a two-stage LLC resonant converter which comprises a mounting plate, a hollow plate is fixedly connected to the rear side of the inner wall of the mounting plate, spring telescopic rods are fixedly connected to the left side and the right side of the inner wall of the hollow plate, and hollow blocks are fixedly connected to the telescopic ends of the spring telescopic rods. An electric bidirectional telescopic rod is fixedly connected between every two adjacent hollow blocks, telescopic plates are rotationally connected to the upper side and the lower side of the inner wall of each hollow block, connecting blocks are fixedly connected to the outer sides of the telescopic plates, and grooves are formed in the periphery of the front side of the outer wall of each hollow plate. According to the utility model, through the cooperation among the electric bidirectional telescopic rod, the hollow block and the telescopic plate, effective fixation of converters of different specifications can be ensured, and through the cooperation among the air pump, the filter screen and the hinge, the filter screen can be easily detached during the heat dissipation of equipment, so that the filter screen can be conveniently replaced in time.

Description

Technical Field

[0001] The utility model relates to the technical field of resonant converters, in particular to a two-stage LLC resonant converter. Background Art

[0002] The two-stage LLC resonant converter is a high-efficiency power converter, which is usually used in the design of DC-DC converters. It combines the characteristics of LLC resonant topology and achieves more efficient power conversion and a wider input voltage range through a two-stage circuit structure.

[0003] After searching, the Chinese patent announcement number is: CN209516904U, which discloses a two-stage LLC resonant converter, including a two-stage LLC resonant converter body, a plurality of pins are connected to the lower end of the two-stage LLC resonant converter body, a circuit main board body is placed on the lower side of the two-stage LLC resonant converter body, the two-stage LLC resonant converter body and the circuit main board body are connected through a plurality of pins, a cooling fan body is connected to the upper side of the two-stage LLC resonant converter body, and a pair of A limiting slide groove, a limiting slide rod is connected between the side walls of the two limiting slide grooves, a limiting slider is inserted on the limiting slider, and a compression spring is connected between the limiting slider and the upper side wall of the limiting slide rod, which can easily protect the pins of the second-hand secondary LLC resonant converter, making it difficult to be damaged during carrying and transportation, and not easy to affect the subsequent use of the second-hand secondary LLC resonant converter. However, when the device is actually used, it cannot fix converters of different specifications and models while maintaining the protection capability, thereby reducing the practicability of the device. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a two-stage LLC resonant converter, aiming to improve the problem in the prior art that converters of different specifications cannot be protected.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a two-stage LLC resonant converter, comprising a mounting plate, a hollow plate fixedly connected to the rear side of the inner wall of the mounting plate, spring telescopic rods fixedly connected to the left and right sides of the inner wall of the hollow plate, a hollow block fixedly connected to the telescopic end of the spring telescopic rod, an electric bidirectional telescopic rod fixedly connected between two adjacent hollow blocks, telescopic plates rotatably connected to the upper and lower sides of the inner walls of the hollow blocks, a connecting block fixedly connected to the outer side of the telescopic plate, grooves are provided around the front side of the outer wall of the hollow plate, a fixing clamp penetrates the groove and is rotatably connected to the outer side of the connecting block, and a cleaning mechanism is provided on the outer side of the mounting plate.

[0006] Through the above technical solution, it is possible to ensure that converters of different specifications are effectively fixed.

[0007] As a further description of the above technical solution:

[0008] A movable door is provided on the front side of the mounting plate, and hinges are fixedly connected to the left and right sides of the outer wall of the movable door. The movable door is rotatably connected to the mounting plate through the hinges, and the front and rear sides of the hinges are rotatably connected to limit blocks. A filter is fixedly connected to the top of the inner wall of the mounting plate, and plug-in slots are fixedly connected to the front and rear sides of the filter, and the plug-in slots are engaged with the limit blocks. An air pump is fixedly connected to the right side of the top end of the mounting plate, and the output end of the air pump passes through the mounting plate.

[0009] Through the above technical solution, the filter can be easily disassembled when the equipment is cooling so as to facilitate timely replacement.

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

[0011] Brackets are fixedly connected to the outer walls of the hollow plate all around, a connecting plate is fixedly connected to the outer side of the bracket, and the rear side of the connecting plate is fixedly connected to the mounting plate.

[0012] Through the above technical solution, the firmness of the fixation between the hollow plate and the mounting plate can be improved.

[0013] As a further description of the above technical solution:

[0014] A controller is fixedly connected to the left side of the top end of the mounting plate, and the controller is electrically connected to the electric bidirectional telescopic rod and the air pump respectively.

[0015] Through the above technical solution, the start-up of the electric bidirectional telescopic rod and the air pump can be controlled separately.

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

[0017] The outer side of the controller is fixedly connected with a shell, and the outer side of the shell is rotatably connected with a shield.

[0018] Through the above technical solution, the protection capability of the controller can be improved.

[0019] As a further description of the above technical solution:

[0020] A sliding groove is provided on the inner side of the groove, and the outer side of the fixing clip is slidably connected to the sliding groove.

[0021] Through the above technical solution, the stability of the fixing clamp during movement can be improved.

[0022] As a further description of the above technical solution:

[0023] A handle is fixedly connected to the front side of the movable door, and a sheath is fixedly connected to the outer side of the handle.

[0024] The above technical solution can facilitate the movement and transportation of the device.

[0025] As a further description of the above technical solution:

[0026] A plurality of positioning blocks are fixedly connected to the outer wall of the mounting plate, positioning holes are provided on the outer sides of the positioning blocks, reserved grooves are provided on the left and right sides of the bottom of the mounting plate, and fan blades are rotatably connected to the inner sides of the two reserved grooves.

[0027] The above technical solution can facilitate the fixing of the device and improve its heat dissipation effect.

[0028] The utility model has the following beneficial effects:

[0029] 1. In the utility model, the hollow block can move left and right by starting the electric bidirectional telescopic rod. At the same time, the elastic potential energy of the spring telescopic rod causes it to extend and retract. The movement of the hollow block drives the telescopic plate and the connecting block thereon to extend and retract and rotate along the groove, thereby fixing the clamping device. In addition, through the extension and retraction of the spring telescopic rod and the protective design of the mounting plate, it can ensure that converters of different specifications are effectively fixed, and at the same time provide necessary protective functions, thereby improving the practicality of the device.

[0030] 2. In the utility model, by starting the air pump, the air flow is guided into the interior of the device to promote heat dissipation. In this process, dust is intercepted and accumulated on the top of the filter. The device is equipped with a hinged door for opening and closing, which is convenient for cleaning and maintenance operations. When the door is opened and closed, the engagement between the limit plate and the plug-in slot is released at the same time, so that the filter can be easily disassembled and replaced in time, thereby improving the convenience of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A three-dimensional diagram of a two-stage LLC resonant converter proposed by the utility model;

[0032] Figure 2 A schematic diagram of a hollow plate structure of a two-stage LLC resonant converter proposed in the utility model;

[0033] Figure 3 This is a schematic diagram of a cleaning mechanism of a two-stage LLC resonant converter proposed in the utility model.

[0034] Legend:

[0035] 1. Mounting plate; 2. Cleaning mechanism; 201. Movable door; 202. Hinge; 203. Limit block; 204. Air pump; 205. Filter; 206. Plug-in slot; 3. Hollow plate; 4. Spring telescopic rod; 5. Hollow block; 6. Electric two-way telescopic rod; 7. Telescopic plate; 8. Connecting block; 9. Fixing clip; 10. Groove; 11. Bracket; 12. Connecting plate; 13. Slide; 14. Handle; 15. Sheath; 16. Positioning block; 17. Positioning hole; 18. Reserved slot; 19. Fan blade; 20. Controller; 21. Housing; 22. Protective cover. DETAILED DESCRIPTION

[0036] 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.

[0037] Reference Figure 1 and Figure 2 , the utility model provides an embodiment: a two-stage LLC resonant converter, including a mounting plate 1, a hollow plate 3 is fixedly connected to the rear side of the inner wall of the mounting plate 1, a spring telescopic rod 4 is fixedly connected to the left and right sides of the inner wall of the hollow plate 3, a hollow block 5 is fixedly connected to the telescopic end of the spring telescopic rod 4, an electric bidirectional telescopic rod 6 is fixedly connected between two adjacent hollow blocks 5, a telescopic plate 7 is rotatably connected to the upper and lower sides of the inner wall of the hollow block 5, a connecting block 8 is fixedly connected to the outer side of the telescopic plate 7, grooves 10 are opened around the front side of the outer wall of the hollow plate 3, the outer side of the connecting block 8 penetrates the groove 10 and is rotatably connected to a fixing clamp 9, and a cleaning mechanism 2 is arranged on the outer side of the mounting plate 1;

[0038] Specifically, by starting the electric bidirectional telescopic rod 6, the hollow plate 3 can move left and right. At the same time, the elastic potential energy of the spring telescopic rod 4 makes it telescopic. When the hollow block 5 moves, it drives the telescopic plate 7 and the connecting block 8 thereon to telescope and rotate along the groove 10, thereby fixing the clamp 9 to clamp the device. In addition, through the telescopic design of the spring telescopic rod 4 and the mounting plate 1, not only the effective fixation of converters of different specifications is ensured, but also the necessary protection function is provided.

[0039] Reference Figure 1 and Figure 3A movable door 201 is provided on the front side of the mounting plate 1, and hinges 202 are fixedly connected to the left and right sides of the outer wall of the movable door 201. The movable door 201 is rotatably connected to the mounting plate 1 through the hinges 202. The front and rear sides of the hinges 202 are rotatably connected to the limit block 203. A filter screen 205 is fixedly connected to the top of the inner wall of the mounting plate 1. The front and rear sides of the filter screen 205 are fixedly connected to the plug-in slot 206, and the plug-in slot 206 is engaged with the limit block 203. An air pump 204 is fixedly connected to the right side of the top of the mounting plate 1, and the output end of the air pump 204 passes through the mounting plate 1;

[0040] Specifically, by starting the air pump 204, the air flow is guided into the interior of the device to promote heat dissipation. During this process, dust is intercepted and accumulated on the top of the filter 205. The device is equipped with a hinge 202 to open and close the movable door 201, which is convenient for cleaning and maintenance operations. While opening and closing the movable door 201, the limit block 203 rotates and releases the engagement with the plug-in slot 206, thereby facilitating the removal of the filter 205 for timely replacement.

[0041] Reference Figure 1 , Figure 2 and Figure 3 The outer wall of the hollow plate 3 is fixedly connected with a bracket 11 all around, the outer side of the bracket 11 is fixedly connected with a connecting plate 12, and the rear side of the connecting plate 12 is fixedly connected with the mounting plate 1; the left side of the top of the mounting plate 1 is fixedly connected with a controller 20, and the controller 20 is electrically connected with the electric two-way telescopic rod 6 and the air pump 204 respectively; the outer side of the controller 20 is fixedly connected with a shell 21, and the outer side of the shell 21 is rotatably connected with a shield 22;

[0042] Specifically, the bracket 11 and the connecting plate 12 thereon can enhance the firmness of the fixation between the mounting plate 1 and the hollow plate 3, the controller 20 can respectively control the starting and operating power between the electric bidirectional telescopic rod 6 and the air pump 204, the outer casing 21 can enhance the protection capability of the controller 20, and the opening and closing of the protective cover 22 can prevent the controller 20 from being accidentally touched when not in use.

[0043] Reference Figure 1 , Figure 2 and Figure 3 A slide groove 13 is provided on the inner side of the groove 10, and the outer side of the fixing clip 9 is slidably connected to the slide groove 13; a handle 14 is fixedly connected to the front side of the movable door 201, and a sheath 15 is fixedly connected to the outer side of the handle 14; a plurality of positioning blocks 16 are fixedly connected to the outer wall of the mounting plate 1, and positioning holes 17 are provided on the outer sides of the plurality of positioning blocks 16; reserved grooves 18 are provided on the left and right sides of the bottom of the mounting plate 1, and fan blades 19 are rotatably connected to the inner sides of the two reserved grooves 18;

[0044] Specifically, the slide groove 13 can improve the stability of the fixing clamp 9 during movement, the handle 14 and the sheath 15 thereon can facilitate the opening and closing of the movable door 201, and the device can be easily installed and fixed by installing a threaded part in the positioning hole 17 on the positioning block 16. The fan blades 19 on the inner side of the reserved groove 18 can improve the heat dissipation and ventilation effects of the device.

[0045] Working principle: Before using the device, first start the electric two-way telescopic rod 6 to drive the hollow plate 3 to move left and right, and use the elastic potential energy to drive the spring telescopic rod 4 to extend and retract. When the hollow block 5 moves, it can drive the telescopic plate 7 and the connecting block 8 thereon to extend and retract and rotate along the groove 10, so as to drive the fixing clamp 9 to fix the equipment. Through the extension and retraction of the spring telescopic rod 4 and the protection of the mounting plate 1, converters of different specifications can be fixed while ensuring protection. By starting the air pump 204, air flow can be driven to dissipate heat inside the device. At this time, dust will be intercepted and accumulated on the top of the filter 205. The movable door 201 can be opened and closed by the hinge 202 for cleaning and maintenance. While opening and closing, the limit block 203 is rotated to release its engagement with the plug-in slot 206, and the filter 205 can be removed for timely replacement.

[0046] 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. A two-stage LLC resonant converter, comprising a mounting plate (1), characterized in that: A hollow plate (3) is fixedly connected to the rear side of the inner wall of the mounting plate (1), spring telescopic rods (4) are fixedly connected to the left and right sides of the inner wall of the hollow plate (3), the telescopic ends of the spring telescopic rods (4) are fixedly connected to hollow blocks (5), an electric bidirectional telescopic rod (6) is fixedly connected between two adjacent hollow blocks (5), telescopic plates (7) are rotatably connected to the upper and lower sides of the inner walls of the hollow blocks (5), the outer sides of the telescopic plates (7) are fixedly connected to connecting blocks (8), grooves (10) are provided around the front side of the outer wall of the hollow plate (3), the outer side of the connecting block (8) passes through the grooves (10) and is rotatably connected to a fixing clamp (9), and a cleaning mechanism (2) is arranged on the outer side of the mounting plate (1).

2. A two-stage LLC resonant converter according to claim 1, characterized in that: A movable door (201) is arranged at the front side of the mounting plate (1), and hinges (202) are fixedly connected to the left and right sides of the outer wall of the movable door (201), and the movable door (201) is rotatably connected to the mounting plate (1) via the hinges (202), and the front and rear sides of the hinges (202) are rotatably connected to a limit block (203), a filter screen (205) is fixedly connected to the top of the inner wall of the mounting plate (1), and the front and rear sides of the filter screen (205) are fixedly connected to a plug-in slot (206), and the plug-in slot (206) is engaged with the limit block (203), and an air pump (204) is fixedly connected to the right side of the top end of the mounting plate (1), and the output end of the air pump (204) passes through the mounting plate (1).

3. A two-stage LLC resonant converter according to claim 1, characterized in that: Brackets (11) are fixedly connected to the outer walls of the hollow plate (3) on all sides, a connecting plate (12) is fixedly connected to the outer side of the bracket (11), and the rear side of the connecting plate (12) is fixedly connected to the mounting plate (1).

4. A two-stage LLC resonant converter according to claim 1, characterized in that: A controller (20) is fixedly connected to the left side of the top end of the mounting plate (1), and the controller (20) is electrically connected to the electric bidirectional telescopic rod (6) and the air pump (204) respectively.

5. A two-stage LLC resonant converter according to claim 4, characterized in that: The outer side of the controller (20) is fixedly connected to a housing (21), and the outer side of the housing (21) is rotatably connected to a protective cover (22).

6. A two-stage LLC resonant converter according to claim 1, characterized in that: A sliding groove (13) is provided on the inner side of the groove (10), and the outer side of the fixing clamp (9) is slidably connected to the sliding groove (13).

7. A two-stage LLC resonant converter according to claim 2, characterized in that: A handle (14) is fixedly connected to the front side of the movable door (201), and a protective cover (15) is fixedly connected to the outer side of the handle (14).

8. The two-stage LLC resonant converter according to claim 1, characterized in that: A plurality of positioning blocks (16) are fixedly connected to the outer wall of the mounting plate (1) on all sides, and positioning holes (17) are provided on the outer sides of the plurality of positioning blocks (16). Reserved grooves (18) are provided on the left and right sides of the bottom of the mounting plate (1), and fan blades (19) are rotatably connected to the inner sides of the two reserved grooves (18).

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