Circuit boards, transformers, microwave generators, and home appliances

Abstract

The invention relates to a circuit board (100), a transformer (50), a microwave generator (1000), and a home appliance, wherein the circuit board (100) is used in the microwave generator (1000), and the circuit board (100) comprises a substrate (10) and a power device (20), the power device (20) includes an integrated rectifier bridge stack and an insulated gate bipolar transistor, and the power device (20) is provided on the substrate (10).

Description

Technical Field

[0001] This application relates to the technical field of microwaves, and particularly to circuit boards, transformers, microwave generators, and household appliances.

Background Art

[0002] In related technologies, a microwave oven includes an electronic control circuit board, which includes a circuit board, a rectifier bridge stack, and an insulated gate bipolar transistor. The rectifier bridge stack and the insulated gate bipolar transistor are respectively provided on the circuit board, resulting in a large occupied space and a large volume of the electronic control circuit board.

Summary of the Invention

Problems to be Solved by the Invention

[0003] Embodiments of this application provide a circuit board, a transformer, a microwave generator, and a household appliance.

Means for Solving the Problems

[0004] The circuit board according to embodiments of this application is used in a microwave generator, and the circuit board includes: a circuit board, and a power device provided on the circuit board, including a rectifier bridge stack and an insulated gate bipolar transistor integrated together. [[ID=#34]]

[0005] By integrating the rectifier bridge stack and the insulated gate bipolar transistor into one power device, the combined structure of the rectifier bridge stack and the insulated gate bipolar transistor is more compact, thereby reducing the space occupied by the circuit board and making it possible to reduce the volume of the circuit board, which is beneficial to the miniaturization of the circuit board.

[0006] In some embodiments, the power device includes a cuboid package body.

[0007] In some embodiments, fixing holes are formed on both sides of the package body, the circuit board further comprises a heat sink provided on the board, and the package body is in close contact with the heat sink via the fixing holes.

[0008] In some embodiments, the heat sink comprises a sheet-like heat transfer portion provided on the substrate, the heat transfer portion includes a contact surface, the heat sink includes side fins extending outward from one side of the heat transfer portion opposite to the contact surface, and top fins extending upward from one end of the heat transfer portion furthest from the substrate, and the package body is in contact with the contact surface.

[0009] In some embodiments, the circuit board includes a resonant capacitor, a housing space is formed between the top fin and the board, and the resonant capacitor is placed in the housing space.

[0010] In some embodiments, the circuit board includes a transformer, and the transformer is A skeletal assembly is provided on the substrate, which has a primary winding groove and a secondary winding groove, and is provided with a first stopper piece, a second stopper piece, a third stopper piece and a support piece, and along the height direction of the transformer, the first stopper piece covers the upper part of the groove opening of the primary winding groove or the groove opening of the secondary winding groove, and the second stopper piece covers the lower part of the groove opening of the primary winding groove or the groove opening of the secondary winding groove, The magnetic core assembly is provided on the frame assembly and includes a first magnetic core, the first magnetic core being located on one side where the secondary winding groove is located, a capacitor assembly being provided on the substrate on one side where the first magnetic core is located, a support piece abutting against the top of the capacitor assembly, the support piece separating the first magnetic core and the capacitor assembly in the height direction of the transformer, a pin being provided between the capacitor assemblies, and a third stopper piece connected to the support piece and extending toward the side where the capacitor assembly is located, covering at least a portion of the pin.

[0011] In some embodiments, the skeletal assembly includes a first skeletal and a second skeletal, the primary winding groove and the secondary winding groove are provided in the first skeletal, the first stopper piece, the second stopper piece, the third stopper piece and the support piece are provided in the second skeletal, the first skeletal is provided with a first housing groove, a through hole and a second housing groove communicating with each other, the first magnetic core is located in the first housing groove and the through hole, and the magnetic core assembly further comprises a second magnetic core, the second magnetic core is located in the second housing groove and the through hole.

[0012] In some embodiments, the first magnetic core includes a first connector and a first extension, and the second magnetic core includes a second connector and a second extension, wherein the first connector is located in the first housing groove, the first extension is located in the through hole, the second connector is located in the second housing groove, and the second extension is located in the through hole.

[0013] In some embodiments, the second skeleton includes a first limit groove and a second limit groove, the first connector is located in the first limit groove and limits the first magnetic core, the second connector is located in the second limit groove and limits the second magnetic core, and there is a gap between the first extension and the second extension.

[0014] In some embodiments, the first frame and the second frame are detachably connected.

[0015] In some embodiments, a plurality of fixing portions are provided protruding from the outside of the top wall of the first receiving groove, and a plurality of rod-shaped grooves are formed on the plurality of fixing portions.

[0016] In some embodiments, the heat sink is provided on one side where the second magnetic core is located, the skeletal assembly further includes a third skeletal structure which is in close contact with the top fin, and the power device is provided between the third skeletal structure and the heat transfer section.

[0017] In some embodiments, the circuit board is It comprises a bus capacitor and a differential mode inductor, The bus capacitor is provided between the differential mode inductor and the transformer, and the differential mode inductor and the bus capacitor are installed sequentially on the substrate.

[0018] The transformer according to the embodiment of the present invention is Circuit board and The circuit board is provided with a skeletal assembly having a primary winding groove and a secondary winding groove, and is provided with a first stopper piece, a second stopper piece, a third stopper piece and a support piece, and along the height direction of the transformer, the first stopper piece covers the upper part of the groove opening of the primary winding groove or the groove opening of the secondary winding groove, and the second stopper piece covers the lower part of the groove opening of the primary winding groove or the groove opening of the secondary winding groove, The magnetic core assembly is provided on the frame assembly and includes a first magnetic core, the first magnetic core being located on one side where the secondary winding groove is located, a capacitor assembly being provided on the circuit board on one side where the first magnetic core is located, a support piece abutting against the top of the capacitor assembly, the support piece separating the first magnetic core and the capacitor assembly in the height direction of the transformer, a second pin being provided between the capacitor assemblies, and a third stopper piece connected to the support piece and extending toward the side where the capacitor assembly is located, covering at least a portion of the second pin.

[0019] In the above transformer, the first stopper piece of the frame assembly covers the upper part of the groove opening of the primary winding groove or the groove opening of the secondary winding groove, the second stopper piece covers the lower part of the groove opening of the primary winding groove or the groove opening of the secondary winding groove, facilitating the fulfillment of the insulation safety gap between the primary winding groove and the secondary winding groove, the support piece abuts against the top of the capacitor assembly to fix the capacitor assembly, and the third stopper piece covers at least a portion of the pins, facilitating the fulfillment of the insulation safety gap between the first magnetic core and the pins, thereby avoiding the need to fulfill the insulation safety gap by increasing the height of the frame wall or the height of the frame, the volume of the transformer can be greatly reduced, and the cost of the transformer can be reduced.

[0020] In some embodiments, the skeletal assembly includes a first skeletal and a second skeletal, the primary winding groove and the secondary winding groove are provided in the first skeletal, the first stopper piece, the second stopper piece, the third stopper piece and the support piece are provided in the second skeletal, the first skeletal is provided with a first housing groove, a through hole and a second housing groove communicating with each other, the first magnetic core is located in the first housing groove and the through hole, and the magnetic core assembly further comprises a second magnetic core, the second magnetic core is located in the second housing groove and the through hole.

[0021] In some embodiments, the first magnetic core includes a first connector and a first extension, and the second magnetic core includes a second connector and a second extension, wherein the first connector is located in the first housing groove, the first extension is located in the through hole, the second connector is located in the second housing groove, and the second extension is located in the through hole.

[0022] In some embodiments, the second skeleton includes a first limit groove and a second limit groove, the first connector is located in the first limit groove and limits the first magnetic core, the second connector is located in the second limit groove and limits the second magnetic core, and there is a gap between the first extension and the second extension.

[0023] In some embodiments, the first skeleton and the second skeleton are removably connected.

[0024] In some embodiments, a plurality of fixing parts protrude outwardly from the top wall of the first receiving groove, and a plurality of rod-shaped grooves are formed in the plurality of fixing parts.

[0025] In some embodiments, a heat sink is provided on the circuit board. The heat sink is provided on one side where the second magnetic core is located. The skeleton assembly further includes a third skeleton, and the third skeleton separates the second magnetic core and the heat sink.

[0026] In some embodiments, the first skeleton is removably connected to the third skeleton.

[0027] In some embodiments, the second pin is the lead-out wire end of the secondary winding coil of the transformer, or the second pin is connected to the lead-out wire end of the secondary winding coil of the transformer.

[0028] The microwave generator according to the embodiments of the present application includes the circuit board described in any of the above embodiments, or the transformer described in any of the above embodiments.

[0029] When the microwave generator includes a circuit board, by integrating a rectifier bridge stack and an insulated gate bipolar transistor into one power device, the combined structure of the rectifier bridge stack and the insulated gate bipolar transistor is more compact. As a result, the space occupied by the circuit board can be reduced, the volume of the circuit board can be decreased, which is beneficial to the miniaturization of the circuit board.

[0030] When the above microwave generator includes a transformer, the first stopper piece of the skeletal assembly covers the upper part of the groove opening of the primary winding groove or the groove opening of the secondary winding groove, the second stopper piece covers the lower part of the groove opening of the primary winding groove or the groove opening of the secondary winding groove, facilitating the fulfillment of the insulation safety gap between the primary winding groove and the secondary winding groove, the support piece abuts against the top of the capacitor assembly to fix the capacitor assembly, and the third stopper piece covers at least a portion of the pins, facilitating the fulfillment of the insulation safety gap between the first magnetic core and the pins, thereby avoiding the need to fulfill the insulation safety gap by increasing the height of the skeletal wall or the height of the skeletal structure, the volume of the transformer can be significantly reduced, and the cost of the transformer can be reduced.

[0031] The home appliance according to the embodiment of the present invention comprises a circuit board described in any of the above embodiments, or a transformer described in any of the above embodiments. [Effects of the Invention]

[0032] When the above-mentioned home appliances are equipped with a circuit board, integrating the rectifier bridge stack and insulated-gate bipolar transistor into a single power device results in a more compact combined structure of the rectifier bridge stack and insulated-gate bipolar transistor. This reduces the space occupied on the circuit board, decreases the volume of the circuit board, and is advantageous for miniaturizing the circuit board.

[0033] When the above-mentioned home appliance includes a transformer, the first stopper piece of the frame assembly covers the upper part of the groove opening of the primary winding groove or the groove opening of the secondary winding groove, the second stopper piece covers the lower part of the groove opening of the primary winding groove or the groove opening of the secondary winding groove, facilitating the fulfillment of the insulation safety gap between the primary winding groove and the secondary winding groove, the support piece abuts against the top of the capacitor assembly to fix the capacitor assembly, and the third stopper piece covers at least a portion of the pins, facilitating the fulfillment of the insulation safety gap between the first magnetic core and the pins, thereby avoiding the need to fulfill the insulation safety gap by increasing the height of the frame wall or the height of the frame, the volume of the transformer can be significantly reduced, and the cost of the transformer can be reduced.

[0034] Additional aspects and advantages of the present invention are shown in part in the following description, some of which will become apparent from the following description or will be understood through the practice of the present invention.

[0035] The above and / or additional aspects and advantages of the present application will become apparent and readily apparent from the description of the embodiments accompanied by the following drawings. [Brief explanation of the drawing]

[0036] [Figure 1] A schematic diagram of a partial structure of a circuit board according to an embodiment of the present invention. [Figure 2] This is a schematic diagram of the structure of a power device according to an embodiment of the present invention. [Figure 3] This is a schematic diagram of the first structure of a circuit board according to an embodiment of the present invention. [Figure 4] This is a second schematic diagram of the structure of a circuit board according to an embodiment of the present invention. [Figure 5] This is a schematic diagram of the third structure of a circuit board according to an embodiment of the present invention. [Figure 6] This is a schematic diagram of a module of a microwave generator according to an embodiment of the present invention. [Figure 7] A schematic diagram of a partial circuit connection of a power device according to an embodiment of the present invention. [Figure 8] This is a schematic diagram of the structure of a transformer according to an embodiment of the present invention. [Figure 9] This is a schematic side view of a transformer according to an embodiment of the present invention. [Figure 10] This is a schematic diagram of the structure of the skeletal assembly and magnetic core assembly according to an embodiment of the present invention. [Figure 11] This is a schematic diagram of the structure of the first skeleton according to an embodiment of the present invention. [Figure 12] This is a schematic diagram of the structure of the first skeleton according to an embodiment of the present invention. [Figure 13] This is a schematic diagram of the second skeleton structure according to an embodiment of the present invention. [Figure 14] This is a schematic diagram of the structure of the second frame and magnetic core assembly according to an embodiment of the present invention. [Figure 15] This is a schematic diagram of the third skeleton according to an embodiment of the present invention. [Figure 16] This is a schematic diagram showing the positions of the first stopper piece and the second stopper piece according to an embodiment of the present invention. [Figure 17] This is a schematic diagram illustrating the other positions of the first stopper piece and the second stopper piece according to an embodiment of the present invention. [Figure 18] This is a schematic diagram illustrating the positions of the first stopper piece and the second stopper piece according to an embodiment of the present invention. [Figure 19] This is a schematic diagram illustrating the positions of the first stopper piece and the second stopper piece according to an embodiment of the present invention. [Modes for carrying out the invention]

[0037] The embodiments of the present application shown in the drawings will be described in detail below. In all drawings, the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions. The embodiments described below through the reference drawings are illustrative and for illustrative purposes only, and should not be understood as limitations to the present application.

[0038] In the description of this application, terms such as "first" and "second" are merely for the purpose of explaining the purpose and cannot be considered to indicate or implicitly suggest relative importance, or to implicitly indicate a number that specifies a technical feature. Therefore, a feature limited to "first" or "second" may be explicitly or implicitly indicated to include one or more such features, and in the description of this application, unless otherwise specifically and clearly limited, the concept of "multiple" is two or more.

[0039] In this description, terms such as “attachment,” “connection,” “bonding,” and “fixing” should be understood broadly unless specifically defined and limited, for example, that connections may be fixed, detachably connected, integrated, mechanically connected, or electrically connected. Connections may be direct, indirectly connected via an intermediate medium, or be internal communication or interaction between two elements. Those skilled in the art will understand the specific meaning of the aforementioned technical terms in this application, depending on the specific circumstances.

[0040] The disclosure of this application provides many different embodiments or examples to realize different structures. For the sake of simplification of the disclosure, the components and configurations of specific examples are described below. Of course, these are merely examples and are not intended to limit the application. The application may repeat reference numbers and / or reference letters in different embodiments, but such repetition is for the purpose of simplification and clarity and does not in itself indicate relationships between the various embodiments and / or configurations discussed. The application provides examples of various specific processes and materials, but those skilled in the art may be aware of the application of other processes and / or the use of other materials.

[0041] Referring to Figure 1, the circuit board 100 according to this embodiment of the present invention is used in a microwave generator 1000. The circuit board 100 comprises a substrate 10 and a power device 20. The power device 20 comprises an integrated rectifier bridge stack (not shown) and an insulated gate bipolar transistor (not shown). The power device 20 is provided on the substrate 10.

[0042] The above-mentioned circuit board 100 integrates a rectifier bridge stack and an insulated gate bipolar transistor into a single power device 20, resulting in a more compact combined structure of the rectifier bridge stack and the insulated gate bipolar transistor. This reduces the space occupied by the circuit board 100, thereby reducing the volume of the circuit board 100 and contributing to the miniaturization of the circuit board 100.

[0043] Specifically, power semiconductor devices are required for the drive power supply circuit of the microwave generator 1000. Rectifier bridge stacks and insulated-gate bipolar transistors belong to the category of power semiconductor devices. Rectifier bridge stacks are used to convert alternating current to direct current. Insulated-gate bipolar transistors can be used to control resonant circuits. In the embodiment shown in Figure 1, the rectifier bridge stack and the insulated-gate bipolar transistor can be integrated into a single power device 20. The substrate 10 may be rectangular in shape. The substrate 10 can support the power device 20. The power device 20 is located near the edge of the circuit board 100 on the substrate 10, and the combined structure of the rectifier bridge stack and the insulated-gate bipolar transistor is more compact, thereby reducing the space occupied by the circuit board 100 and reducing the volume of the circuit board 100, which is advantageous for miniaturizing the circuit board 100.

[0044] Combining Figure 2, in some embodiments, the power device 20 includes a rectangular parallelepiped package 22.

[0045] In this way, the shape of the conventional rectifier bridge stack and insulated-gate bipolar transistor is better matched, facilitating integration while more effectively reducing the volume of the power device 20.

[0046] Specifically, the power device 20 comprises a package 22. The package 22 may be rectangular in shape. In Figure 1, the length of the circuit board 100 may be indicated by L. The package 22 can be provided above the board 10 along the L direction of the circuit board 100. Designing the package 22 as a rectangular parallelepiped allows for better fit with the shapes of conventional rectifier bridge stacks and insulated-gate bipolar transistors, facilitating integration while more effectively reducing the volume of the power device 20. In other embodiments, the package 22 may be provided in an elongated ellipse or other shape that improves fitment, and is not specifically limited herein.

[0047] By combining Figures 1 and 2, in some embodiments, fixing holes 24 are formed on both sides of the package body 22. The circuit board 100 further includes a heat sink 40 provided on the substrate 10. The package body 22 is in close contact with the heat sink 40 through the fixing holes 24.

[0048] In this way, the package body 22 is more closely attached to the heat sink 40, improving the heat dissipation effect.

[0049] Specifically, in the embodiment shown in Figure 2, the longitudinal direction of the package body 22 can be denoted by K. Two fixing holes 24 are provided in the package body 22. The two fixing holes 24 can be provided near the center on both sides of the package body 22, along the K direction of the package body 22. The fixing holes 24 may be arc-shaped, and the side walls of the fixing holes 24 can be connected to the side surface of the package body 22. In Figure 1, the heat sink 40 can be provided on the substrate 10 near the edge of the substrate 10. Screws 30 are provided on the circuit board 100. The screws 30 can pass through the fixing holes 24 on both sides of the package body 22, and the package body 22 is further fixed in close contact with the heat sink 40 at one end close to the heat sink 40.

[0050] Furthermore, the arc-shaped fixing holes 24 facilitate the removal of the package body 22 and improve work efficiency. In one embodiment, when it is necessary to remove the package body 22, the screw 30 on one side of the package body 22 can be completely unscrewed, and then the screw 30 on the other side of the package body 22 can be loosened without completely unscrewing it, and then the package body 22 can be removed to improve the speed of removal. In other embodiments, the number of fixing holes 24 may be two, three, or any other number, and the shape of the fixing holes 24 may be arc-shaped or other shapes, and is not specifically limited herein.

[0051] Combining Figures 1 and 3, in some embodiments, the heat sink 40 includes a sheet-like heat transfer section 42 provided on the substrate 10. The heat transfer section 42 includes a contact surface 44. The heat sink 40 includes side fins 48 extending outward from one side of the heat transfer section 42 opposite to the contact surface 44, and a top fin 46 extending upward from one end of the heat transfer section 42 furthest from the substrate 10. The package body 22 is in close contact with the contact surface 44.

[0052] In this way, the fins are distributed using the available space to increase the heat dissipation area, while simultaneously securing space to accommodate the power device 20. Thus, the volume of the heatsink 40 can be effectively controlled, and the structure of the heatsink 40 and the power device 20 is made more compact, thus controlling the overall volume of the circuit board 100.

[0053] Specifically, in the embodiment shown in Figure 3, a heat transfer section 42 is provided on the heat sink 40. The heat transfer section 42 may be in the form of a sheet and is provided on the substrate 10. The heat transfer section 42 is provided with a contact surface 44 located on one side of the heat transfer section 42. The package body 22 can be tightly fixed to the heat transfer section 42 by the contact surface 44. The heat sink 40 is further provided with side fins 48 and top fins 46. The side fins 48 are provided on one side of the heat transfer section 42 opposite to the contact surface 44 and can extend outward. The top fins 46 are provided on the end of the heat transfer section 42 furthest from the substrate 10 and can extend upward. In Figure 3, five top fins 46 are provided. Four side fins 48 are provided. By distributing the top fin 46 and side fin 48 on the end of the heat transfer section 42 furthest from the substrate 10 and on the side opposite the contact surface 44, respectively, the heat dissipation area can be increased while simultaneously securing space to accommodate the power device 20. In this way, the volume of the heat sink 40 can be effectively controlled, and the structure of the heat sink 40 and power device 20 can be made more compact, thus controlling the overall volume of the circuit board 100.

[0054] Furthermore, the numbers of the top fin (46) and side fins (48) can be other numbers and can be adjusted according to the specific circumstances; they are not specifically limited here.

[0055] Referring to Figures 8 and 19, the circuit board 100 includes a transformer 50. The transformer 50 includes a substrate 10, a frame assembly 112 and a magnetic core assembly 128. The frame assembly 112 is provided on the substrate 10 and has a primary winding groove 116 and a secondary winding groove 118. The frame assembly 112 is provided with a first stopper piece 120, a second stopper piece 122, a third stopper piece 124 and a support piece 126. Along the height direction of the transformer 50, the first stopper piece 120 covers the upper part of the groove opening of the primary winding groove 116 or the groove opening of the secondary winding groove 118, and the second stopper piece 122 covers the lower part of the groove opening of the primary winding groove 116 or the groove opening of the secondary winding groove 118.

[0056] The magnetic core assembly 128 is provided on the frame assembly 112, and the magnetic core assembly 128 includes a first magnetic core 130, which is provided on one side where the secondary winding groove 118 is located, and a capacitor assembly 132 is provided on the substrate 10 on the one side where the first magnetic core 130 is located, and a support piece 126 abuts against the top of the capacitor assembly 132, and the support piece 126 separates the first magnetic core 130 and the capacitor assembly 132 in the height direction of the transformer 50, and a second pin 114 is provided between the capacitor assembly 132, and a third stopper piece 124 is connected to the support piece 126 and extends to the one side where the capacitor assembly 132 is located and covers at least a portion of the second pin 114.

[0057] Thus, the first stopper piece 120 of the frame assembly 112 covers the upper part of the groove opening of the primary winding groove 116 or the groove opening of the secondary winding groove 118, the second stopper piece 122 covers the lower part of the groove opening of the primary winding groove 116 or the groove opening of the secondary winding groove 118, facilitating the fulfillment of the insulation safety gap between the primary winding groove 116 and the secondary winding groove 118, the support piece 126 abuts against the top of the capacitor assembly 132 to fix the capacitor assembly 132, and the third stopper piece 124 covers at least a portion of the second pin 114, facilitating the fulfillment of the insulation safety gap between the first magnetic core 130 and the second pin 114, thereby increasing the height of the frame wall or the height of the frame, the insulation safety gap can be fulfilled, the volume of the transformer 50 can be significantly reduced and the cost of the transformer 50 can be reduced.

[0058] Specifically, referring to Figures 8 and 10, the skeletal assembly 112 of the transformer 50 is mounted on the substrate 10, and the magnetic core assembly 128 is fixed to the skeletal assembly 112. Primary winding grooves 116 and secondary winding grooves 118 are provided on the surface of the skeletal assembly 112. The primary winding grooves 116 and secondary winding grooves 118 are recesses for winding coils, and they are one of the important components of the transformer 50, mainly serving to fix the coils, protect the coils, improve magnetic flux, and reduce leakage magnetism. In the operating state, high voltages exist on one side of the primary winding groove 116 and on one side of the secondary winding groove 118, so they must satisfy the corresponding insulation safety gap. In related technologies, the insulation safety gap is satisfied by extending the height of the side walls of the primary winding groove 116 and secondary winding groove 118, that is, by increasing the height of the skeletal wall or the height of the skeletal structure. Thus, the volume of the transformer 50 is often excessive.

[0059] Referring to Figures 10 and 16-19, Figures 16-19 are simplified schematic diagrams of multiple positions of the first and second stopper pieces according to embodiments of the present invention. Along the height direction of the transformer 50, the first stopper piece 120 of the frame assembly 112 covers the upper part of the groove opening of the primary winding groove 116 or the groove opening of the secondary winding groove 118, and the second stopper piece 122 of the frame assembly 112 covers the lower part of the groove opening of the primary winding groove 116 or the groove opening of the secondary winding groove 118. In this way, an insulating safety gap can be met between the side where the primary winding groove 116 is located and the side where the secondary winding groove 118 is located, the volume of the transformer 50 can be significantly reduced, and the cost of the transformer 50 can be reduced. In this embodiment, referring to Figures 10 and 16, along the height direction of the transformer 50, the first stopper piece 120 of the frame assembly 112 covers the upper part of the groove opening of the primary winding groove 116, and the second stopper piece 122 of the frame assembly 112 covers the lower part of the groove opening of the primary winding groove 116. Referring to Figures 10 and 17, along the height direction of the transformer 50, the first stopper piece 120 of the frame assembly 112 covers the upper part of the groove opening of the secondary winding groove 118, and the second stopper piece 122 of the frame assembly 112 covers the lower part of the groove opening of the secondary winding groove 118. Referring to Figures 10 and 18, along the height direction of the transformer 50, the first stopper piece 120 of the frame assembly 112 covers the upper part of the groove opening of the secondary winding groove 118, and the second stopper piece 122 of the frame assembly 112 covers the lower part of the groove opening of the primary winding groove 116. Referring to Figures 10 and 19, along the height direction of the transformer 50, the first stopper piece 120 of the frame assembly 112 covers the upper part of the groove opening of the primary winding groove 116, and the second stopper piece 122 of the frame assembly 112 covers the lower part of the groove opening of the secondary winding groove 118.

[0060] Referring to Figures 8 and 9, the magnetic core assembly 128 is provided on the frame assembly 112, the first magnetic core 130 of the magnetic core assembly 128 is provided on one side where the secondary winding groove 118 is located, and the capacitor assembly 132 is provided on the substrate 10 on the one side where the first magnetic core 130 is located, and the first magnetic core 130 and the capacitor assembly 132 are spaced apart in the height direction of the transformer 50. In some embodiments, the capacitor assembly 132 may include two voltage doubler rectifier capacitors spaced apart on the substrate 10. A support piece 126 of the frame assembly 112 abuts against the top of the capacitor assembly 132, and the support piece 126 separates the first magnetic core 130 and the capacitor assembly 132 in the height direction of the transformer 50, with a second pin 114 provided between the capacitor assemblies 132. In some embodiments, the second pin 114 may be the lead wire terminal of the secondary winding coil of the transformer 50, or the second pin 114 may be connected to the lead wire terminal of the secondary winding coil of the transformer 50. The third stopper piece 124 of the frame assembly 112 is connected to the support piece 126 and extends to one side where the capacitor assembly 132 is located, covering at least a portion of the second pin 114. In this way, the support piece 126 abuts against the top of the capacitor assembly 132, allowing the capacitor assembly 132 to be fixed to the substrate 10, and preventing temporary soldering due to the lifting of the capacitor assembly 132, i.e., the voltage doubler rectifier capacitor, during flow soldering of the substrate 10. The third stopper piece 124 is also connected to the support piece 126 and extends to one side where the capacitor assembly 132 is located, covering at least a portion of the second pin 114, thus increasing the insulating safety gap between the second pin 114 and the first magnetic core 130.

[0061] In some embodiments, referring to Figures 8, 10-13, the skeletal assembly 112 includes a first skeletal 134 and a second skeletal 136, with a primary winding groove 116 and a secondary winding groove 118 provided in the first skeletal 134, a first stopper piece 120, a second stopper piece 122, a third stopper piece 124 and a support piece 126 provided in the second skeletal 136, a first housing groove 138, a through hole 140 and a second housing groove 142 which are interconnected in the first skeletal 134, a first magnetic core 130 located in the first housing groove 138 and the through hole 140, and the magnetic core assembly 128 further includes a second magnetic core 144, the second magnetic core 144 located in the second housing groove 142 and the through hole 140.

[0062] In this way, the first frame 134 can fix the magnetic core assembly 128, and the installation of the first stopper piece 120, the second stopper piece 122, and the third stopper piece 124 on the second frame 136 can satisfy the insulation safety spacing.

[0063] Specifically, referring to Figures 8, 11, and 13, the frame assembly 112 includes a first frame 134 and a second frame 136, with the primary winding groove 116 and secondary winding groove 118 provided in the first frame 134. Referring to Figures 8, 10-12, the first housing groove 138, through hole 140, and second housing groove 142 on the first frame 134 are interconnected, the first magnetic core 130 of the magnetic core assembly 128 is located in the first housing groove 138 and through hole 140, and the second magnetic core 144 of the magnetic core assembly 128 is located in the second housing groove 142 and through hole 140. In this way, the first frame 134 can fix the magnetic core assembly 128. Furthermore, referring to the above, the first stopper piece 120 and the second stopper piece 122 of the second frame 136 can satisfy the insulation safety distance between the side where the primary winding groove 116 is located and the side where the secondary winding groove 118 is located. The third stopper piece 124 of the second frame 136 increases the insulation safety distance between the second pin 114 and the first magnetic core 130. In some embodiments, in order to satisfy the volume adaptability requirements of the transformer 50, one or two of the first stopper piece 120, the second stopper piece 122 and the third stopper piece 124 may be provided in the transformer 50, i.e., the transformer 50 may be provided with only one or two of the first stopper piece 120, the second stopper piece 122 and the third stopper piece 124.

[0064] In some embodiments, referring to Figures 8, 11, and 12, the first magnetic core 130 includes a first connecting portion 146 and a first extension 148, and the second magnetic core 144 includes a second connecting portion 150 and a second extension 152, the first connecting portion 146 is located in a first housing groove 138, the first extension 148 is located in a through hole 140, the second connecting portion 150 is located in a second housing groove 142, and the second extension 152 is located in a through hole 140.

[0065] In this way, the first accommodating groove 138, the through hole 140, and the second accommodating groove 142 on the first frame 134 can secure the magnetic core assembly 128.

[0066] Specifically, referring to Figures 8, 11, and 12, the first frame 134 is provided with a first housing groove 138, a through hole 140, and a second housing groove 142 that are interconnected. The first connection portion 146 of the first magnetic core 130 is located in the first housing groove 138 on the first frame 134, and the first extension portion 148 is located in the through hole 140. The second connection portion 150 of the second magnetic core 144 is located in the second housing groove 142, and the second extension portion 152 is located in the through hole 140. The first frame 134 fixes the magnetic core assembly 128, which is a very important component of the transformer 50, as it can improve the efficiency and power density of the transformer 50 and reduce electrical energy loss.

[0067] In some embodiments, referring to Figures 13 and 14, the second frame 136 includes a first limit groove 154 and a second limit groove 156, the first connector 146 is located in the first limit groove 154 and limits the first magnetic core 130, the second connector 150 is located in the second limit groove 156 and limits the second magnetic core 144, and there is a gap between the first extension 148 and the second extension 152.

[0068] In this way, the gap between the first extension 148 and the second extension 152 forms an air gap 166.

[0069] Specifically, referring to Figures 13 and 14, the second frame 136 includes a first limit groove 154 and a second limit groove 156, the first connector 146 is located in the first limit groove 154 and limits the first magnetic core 130, the second connector 150 is located in the second limit groove 156 and limits the second magnetic core 144, and there is a gap between the first extension 148 and the second extension 152, i.e., an air gap 166 between the first magnetic core 130 and the second magnetic core 144. The air gap 166 between the first magnetic core 130 and the second magnetic core 144 can improve the efficiency of the transformer 50 and reduce energy loss. The design of a proper air gap 166 helps to control the flow path of magnetic flux and the magnetic field distribution, thereby making the operation of the transformer 50 more stable and reliable. In this embodiment, an appropriate air gap 166 is obtained by rationally installing the second frame 136.

[0070] In some embodiments, referring to Figures 8, 11, and 13, the first frame 134 and the second frame 136 are detachably connected.

[0071] In this way, the first frame 134 and the second frame 136 are detachably connected, which facilitates winding the primary winding groove 116 and the secondary winding groove 118 of the first frame 134.

[0072] Specifically, referring to Figures 8, 11, and 13, the first frame 134 and the second frame 136 are detachably connected. In some embodiments, for mounting the transformer 50, windings are first made in the primary winding groove 116 and secondary winding groove 118 in the first frame 134, then the second frame 136 is attached to the first frame 134, and after mounting the first frame 134 and the second frame 136, the magnetic core assembly 128 is attached to the frame assembly 112.

[0073] In some embodiments, referring to Figures 8, 10, and 11, a plurality of fixing portions 158 are provided protruding from the outside of the top wall of the first receiving groove 138, and a plurality of rod-shaped grooves 160 are formed in the plurality of fixing portions 158.

[0074] Thus, the multiple fixing portions 158 protruding from the outside of the top wall of the first housing groove 138 increase the insulation safety distance between the secondary winding groove 118 and the first magnetic core 130, and the rod-shaped grooves 160 formed in the fixing portions 158 facilitate wiring.

[0075] Specifically, referring to Figures 8, 10, and 11, the first magnetic core 130 is provided within the first housing groove 138, the secondary winding groove 118 is spaced apart from the first magnetic core 130 via the top and side walls of the first housing groove 138, and by providing a plurality of fixing parts 158 protruding from the outside of the top wall of the first housing groove 138, the insulating safety distance between the secondary winding groove 118 and the first magnetic core 130 can be increased. In addition, rod-shaped grooves 160 are formed in the plurality of fixing parts 158, and the rod-shaped grooves 160 can be used for wiring, and in some embodiments, the rod-shaped grooves 160 can be used to fix the filament wire of the magnetron.

[0076] In some embodiments, referring to Figures 8, 10, and 15, a heat sink 40 is provided on the substrate 10, the heat sink 40 is provided on one side where the second magnetic core 144 is located, and the frame assembly 112 further comprises a third frame 164, the third frame 164 separating the second magnetic core 144 from the heat sink 40.

[0077] In this way, the heat sink 40 can dissipate heat from the transformer 50, and the third frame 164 can increase the insulation safety distance between the second magnetic core 144 and the heat sink 40.

[0078] Specifically, referring to Figure 8, a heat sink 40 is provided on the substrate 10, and the heat sink 40 is located on one side where the second magnetic core 144 is located. The heat sink 40 is used to dissipate heat from the transformer 50, controlling and stabilizing the temperature of the transformer 50, and preventing the performance and lifespan of the transformer 50 from being affected by an increase in the internal temperature of the transformer 50 due to excessive heat generated when current flows through the transformer 50. The frame assembly 112 further comprises a third frame 164, which separates the second magnetic core 144 from the heat sink 40. Specifically, referring to Figures 10 and 15, the third frame 164 is connected to the outside of the top wall of the second housing groove 142, extends to one side where the substrate 10 is located, and separates the second magnetic core 144 from the heat sink 40. In this way, the insulation safety distance between the second magnetic core 144 and the heat sink 40 is increased, while the insulation safety distance between the primary winding groove 116 and the second magnetic core 144 is also increased.

[0079] In some embodiments, referring to Figures 10 and 15, the first frame 134 and the third frame 164 are detachably connected.

[0080] This facilitates the attachment of the skeletal assembly 112 and the magnetic core assembly 128.

[0081] Specifically, referring to Figures 10 and 15, the first frame 134 and the third frame 164 are detachably connected. Referring to the above, the first frame 134 and the second frame 136 are attached, and the magnetic core assembly 128 is attached, and then the third frame 164 is attached to one side of the second magnetic core 144.

[0082] Combining Figures 3 and 4, in some embodiments, the heat sink 40 is provided on one side where the second magnetic core 144 is located. The frame assembly 112 further comprises a third frame 164. The third frame 164 is in close contact with the top fin 46. The power device 20 is provided between the third frame 164 and the heat transfer section 42.

[0083] Thus, the close-fitting installation is advantageous for improving heat dissipation efficiency, ensuring the heat dissipation efficiency of the transformer 50, while also making the structure of the transformer 50, power device 20, and heat sink 40 more compact, allowing for better control of the volume of the circuit board 100.

[0084] Specifically, in Figure 3, the transformer 50 may be provided as the main element on the circuit board 100, close to the center of the board 10. A third frame 164 is provided on the transformer 50. The third frame 164 may be provided on the board 10. At one end of the third frame 164 furthest from the board 10, the side closer to the heat sink 40 may be in close contact with the top fin 46. The power device 20 is fixedly connected to the contact surface 44 and provided below the top fin 46, positioned between the third frame 164 and the heat transfer section 42. In other words, by closely installing the third frame 164 and the top fin 46, it is advantageous to improve heat dissipation efficiency, guaranteeing the heat dissipation efficiency of the transformer 50, while at the same time making the structure of the transformer 50, power device 20 and heat sink 40 more compact, and allowing for better control of the volume of the circuit board 100.

[0085] Combining Figures 2 and 3, in some embodiments, the power device 20 includes a plurality of first pins 26. The plurality of first pins 26 extend downward from the package body 22. The power device 20 is fixed to the substrate 10 by the plurality of first pins 26. The plurality of first pins 26 include a plurality of high-voltage pins 27 and a plurality of low-voltage pins 28. The plurality of high-voltage pins 27 are arranged adjacent to each other. The plurality of low-voltage pins 28 are arranged adjacent to each other.

[0086] Thus, by installing multiple first pins 26, the design of the circuit board 100 is simple in structure and advantageous in reducing the volume of the circuit board 100.

[0087] Specifically, in Figure 2, the power device 20 is provided with seven first pins 26. The seven first pins 26 are located at the bottom of the package body 22 and extend downward. The power device 20 can be fixed to the substrate 10 with the seven first pins 26. The seven first pins 26 include two high-voltage pins 27 and three low-voltage pins 28. The two high-voltage pins 27 are located adjacent to each other and near one end of the package body 22. The three low-voltage pins 28 are located adjacent to each other and near the other end of the package body 22. The design of multiple first pins 26 simplifies the layout design of the circuit board 100 to some extent, resulting in a simpler design for the circuit board 100 and contributing to a reduction in the volume of the circuit board 100.

[0088] Furthermore, in the embodiment shown in Figure 7, the power device 20 includes a rectifier bridge stack and an insulated-gate bipolar transistor. Four rectifier diodes 21 may be provided within the circuit of the rectifier bridge stack. In one embodiment, an AC current is input to the high-voltage pin 27 and converted by the rectifier diodes 21, allowing the rectifier bridge stack to convert the AC current to a DC current, which can then be output from the low-voltage pin 28. The rectifier bridge stack can be denoted as S1. The insulated-gate bipolar transistor can be denoted as S2.

[0089] Combining Figure 5, in some embodiments, the circuit board 100 includes a bus capacitor 60 and a differential mode inductor 70. The bus capacitor 60 is located between the differential mode inductor 70 and the transformer 50. The differential mode inductor 70 and the bus capacitor 60 are sequentially arranged and installed on the board 10.

[0090] In this way, the width of the circuit board 100 can be reduced, thereby reducing the volume of the circuit board 100.

[0091] Specifically, in the embodiment shown in Figure 5, the width direction of the circuit board 100 can be denoted by D. The differential mode inductor 70 can be provided close to one side of the circuit board 100. The bus capacitor 60 can be provided between the differential mode inductor 70 and the third frame 164. The differential mode inductor 70 and the bus capacitor 60 can be sequentially arranged on the board 10 in a direction mutually perpendicular to the D direction, thereby reducing the width of the circuit board 100 and, consequently, reducing the volume of the circuit board 100.

[0092] Combining Figures 1 and 3, in some embodiments, the circuit board 100 includes a resonant capacitor 80. A housing space 82 is formed between the top fin 46 and the substrate 10. The resonant capacitor 80 is placed in the housing space 82.

[0093] In this way, by placing the resonant capacitor 80 within the housing space 82, the structure between the resonant capacitor 80 and the heat sink 40 is compact, and the volume of the circuit board 100 can be reduced.

[0094] Specifically, in the embodiment shown in Figure 1, the heat sink 40 can be located far from the center of the circuit board 100. The heat sink 40 may have a T-shaped structure. The top fin 46 can be combined with the substrate 10 to form a housing space 82. The resonant capacitor 80 may be inserted into the substrate 10 and located within the housing space 82. The resonant capacitor 80 is located close to the heat transfer section 42. Because the resonant capacitor 80 is located within the housing space 82, heat can be dissipated from the top and sides of the resonant capacitor 80, improving heat dissipation efficiency and further reducing the volume of the circuit board 100.

[0095] Furthermore, in related technologies, high voltages exist at the primary and secondary ends of a transformer, and in order to meet the insulation safety distance between the primary and secondary coils of the transformer, it is generally necessary to increase the height of the skeletal walls of the primary and secondary windings. In addition, in order to meet the insulation safety distance between the secondary coil pins and the magnetic core of the transformer, it is generally necessary to increase the height of the skeletal structure and the height of the magnetic core to increase the insulation safety distance between the secondary coil pins and the magnetic core. As a result, the overall volume of the transformer becomes excessive, and the manufacturing cost increases.

[0096] Referring to Figures 8 and 19, the transformer 50 according to this embodiment of the application comprises a circuit board 10, a frame assembly 112, and a magnetic core assembly 128. The frame assembly 112 is provided on the circuit board 10 and has a primary winding groove 116 and a secondary winding groove 118. The frame assembly 112 is provided with a first stopper piece 120, a second stopper piece 122, a third stopper piece 124, and a support piece 126. Along the height direction of the transformer 50, the first stopper piece 120 covers the upper part of the groove opening of the primary winding groove 116 or the groove opening of the secondary winding groove 118, and the second stopper piece 122 covers the lower part of the groove opening of the primary winding groove 116 or the groove opening of the secondary winding groove 118.

[0097] The magnetic core assembly 128 is provided on the frame assembly 112, and the magnetic core assembly 128 comprises a first magnetic core 130, which is provided on one side where the secondary winding groove 118 is located. A capacitor assembly 132 is provided on the circuit board 10 on the side where the first magnetic core 130 is located, and a support piece 126 abuts against the top of the capacitor assembly 132, separating the first magnetic core 130 and the capacitor assembly 132 in the height direction of the transformer 50, with a second pin 114 provided between the capacitor assembly 132, and a third stopper piece 124 is connected to the support piece 126 and extends to the side where the capacitor assembly 132 is located and covers at least a portion of the second pin 114.

[0098] Thus, the first stopper piece 120 of the skeletal assembly 112 covers the upper part of the groove opening of the primary winding groove 116 or the groove opening of the secondary winding groove 118, the second stopper piece 122 covers the lower part of the groove opening of the primary winding groove 116 or the groove opening of the secondary winding groove 118, facilitating the meeting of the insulation safety gap between the primary winding groove 116 and the secondary winding groove 118, the support piece 126 abuts against the top of the capacitor assembly 132 to fix the capacitor assembly 132, and the third stopper piece 124 covers at least a portion of the second pin 114, facilitating the meeting of the insulation safety gap between the first magnetic core 130 and the second pin 114. By increasing the height of the skeletal wall or the height of the skeletal structure, it is possible to avoid meeting the insulation safety gap, significantly reduce the volume of the transformer 50, and reduce the cost of the transformer 50.

[0099] Specifically, referring to Figures 8 and 10, the skeletal assembly 112 of the transformer 50 is mounted on the circuit board 10, and the magnetic core assembly 128 is fixed to the skeletal assembly 112. Primary winding grooves 116 and secondary winding grooves 118 are provided on the surface of the skeletal assembly 112. The primary winding grooves 116 and secondary winding grooves 118 are used to wind the coil grooves, and they are one of the important components of the transformer 50, mainly serving to fix the coils, protect the coils, improve magnetic flux, and reduce leakage magnetism. In the operating state, high voltages exist on one side of the primary winding groove 116 and on one side of the secondary winding groove 118, so they must satisfy the corresponding insulation safety gap. In related technologies, the insulation safety gap is satisfied by extending the height of the side walls of the primary winding groove 116 and secondary winding groove 118, that is, by increasing the height of the skeletal wall or the height of the skeletal structure. Thus, the volume of the transformer 50 is often excessive.

[0100] Referring to Figures 10 and 16-19, Figures 16-19 are simple schematic diagrams of multiple positions of the first and second stopper pieces according to embodiments of the present invention. Along the height direction of the transformer 50, the first stopper piece 120 of the frame assembly 112 covers the upper part of the groove opening of the primary winding groove 116 or the groove opening of the secondary winding groove 118, and the second stopper piece 122 of the frame assembly 112 covers the lower part of the groove opening of the primary winding groove 116 or the groove opening of the secondary winding groove 118. In this way, the insulation safety distance between the side where the primary winding groove 116 is located and the side where the secondary winding groove 118 is located can be met, the volume of the transformer 50 can be greatly reduced and the cost of the transformer 50 can be reduced. In this embodiment, referring to Figures 10 and 16, along the height direction of the transformer 50, the first stopper piece 120 of the frame assembly 112 covers the upper part of the groove opening of the primary winding groove 116, and the second stopper piece 122 of the frame assembly 112 covers the lower part of the groove opening of the primary winding groove 116. Referring to Figures 10 and 17, along the height direction of the transformer 50, the first stopper piece 120 of the frame assembly 112 covers the upper part of the groove opening of the secondary winding groove 118, and the second stopper piece 122 of the frame assembly 112 covers the lower part of the groove opening of the secondary winding groove 118. Referring to Figures 10 and 18, along the height direction of the transformer 50, the first stopper piece 120 of the frame assembly 112 covers the upper part of the groove opening of the secondary winding groove 118, and the second stopper piece 122 of the frame assembly 112 covers the lower part of the groove opening of the primary winding groove 116. Referring to Figures 10 and 19, along the height direction of the transformer 50, the first stopper piece 120 of the frame assembly 112 covers the upper part of the groove opening of the primary winding groove 116, and the second stopper piece 122 of the frame assembly 112 covers the lower part of the groove opening of the secondary winding groove 118.

[0101] Referring to Figures 8 and 9, the magnetic core assembly 128 is provided on the frame assembly 112, the first magnetic core 130 of the magnetic core assembly 128 is provided on one side where the secondary winding groove 118 is located, and the capacitor assembly 132 is provided on the circuit board 10 on the one side where the first magnetic core 130 is located, and the first magnetic core 130 and the capacitor assembly 132 are spaced apart in the height direction of the transformer 50. In some embodiments, the capacitor assembly 132 may comprise two voltage doubler rectifier capacitors spaced apart on the circuit board 10. A support piece 126 of the frame assembly 112 abuts against the top of the capacitor assembly 132, and the support piece 126 separates the first magnetic core 130 and the capacitor assembly 132 in the height direction of the transformer 50, with a second pin 114 provided between the capacitor assemblies 132. In some embodiments, the second pin 114 may be the lead wire terminal of the secondary winding coil of the transformer 50, or the second pin 114 may be connected to the lead wire terminal of the secondary winding coil of the transformer 50. The third stopper piece 124 of the frame assembly 112 is connected to the support piece 126 and extends to one side where the capacitor assembly 132 is located, covering at least a portion of the second pin 114. In this way, the support piece 126 abuts against the top of the capacitor assembly 132, allowing the capacitor assembly 132 to be fixed to the circuit board 10, and preventing temporary soldering due to the lifting of the capacitor assembly 132, i.e., the voltage doubler rectifier capacitor, during flow soldering of the board 10. In addition, the third stopper piece 124 is connected to the support piece 126 and extends to one side where the capacitor assembly 132 is located, covering at least a portion of the second pin 114, thus increasing the insulating safety gap between the second pin 114 and the first magnetic core 130.

[0102] In some embodiments, referring to Figures 8, 10-13, the skeletal assembly 112 includes a first skeletal 134 and a second skeletal 136, with a primary winding groove 116 and a secondary winding groove 118 provided in the first skeletal 134, a first stopper piece 120, a second stopper piece 122, a third stopper piece 124 and a support piece 126 provided in the second skeletal 136, a first housing groove 138, a through hole 140 and a second housing groove 142 which are interconnected in the first skeletal 134, a first magnetic core 130 located in the first housing groove 138 and the through hole 140, and the magnetic core assembly 128 further includes a second magnetic core 144, the second magnetic core 144 located in the second housing groove 142 and the through hole 140.

[0103] In this way, the first frame 134 can fix the magnetic core assembly 128, and the installation of the first stopper piece 120, the second stopper piece 122, and the third stopper piece 124 on the second frame 136 can satisfy the insulation safety spacing.

[0104] Specifically, referring to Figures 8, 11, and 13, the frame assembly 112 includes a first frame 134 and a second frame 136, with the primary winding groove 116 and secondary winding groove 118 provided in the first frame 134. Referring to Figures 8, 10-12, the first housing groove 138, through hole 140, and second housing groove 142 on the first frame 134 are interconnected, the first magnetic core 130 of the magnetic core assembly 128 is located in the first housing groove 138 and through hole 140, and the second magnetic core 144 of the magnetic core assembly 128 is located in the second housing groove 142 and through hole 140. In this way, the first frame 134 can fix the magnetic core assembly 128. Furthermore, referring to the above, the first stopper piece 120 and the second stopper piece 122 of the second frame 136 can satisfy the insulation safety distance between the side where the primary winding groove 116 is located and the side where the secondary winding groove 118 is located. The third stopper piece 124 of the second frame 136 increases the insulation safety distance between the second pin 114 and the first magnetic core 130. In some embodiments, in order to satisfy the volume adaptability requirements of the transformer 50, one or two of the first stopper piece 120, the second stopper piece 122 and the third stopper piece 124 may be provided in the transformer 50, i.e., the transformer 50 may be provided with only one or two of the first stopper piece 120, the second stopper piece 122 and the third stopper piece 124.

[0105] In some embodiments, referring to Figures 8, 11, and 12, the first magnetic core 130 includes a first connecting portion 146 and a first extension 148, and the second magnetic core 144 includes a second connecting portion 150 and a second extension 152, the first connecting portion 146 is located in a first housing groove 138, the first extension 148 is located in a through hole 140, the second connecting portion 150 is located in a second housing groove 142, and the second extension 152 is located in a through hole 140.

[0106] In this way, the first accommodating groove 138, the through hole 140, and the second accommodating groove 142 on the first frame 134 can secure the magnetic core assembly 128.

[0107] Specifically, referring to Figures 8, 11, and 12, the first frame 134 is provided with a first housing groove 138, a through hole 140, and a second housing groove 142 that are interconnected. The first connection portion 146 of the first magnetic core 130 is located in the first housing groove 138 on the first frame 134, and the first extension portion 148 is located in the through hole 140. The second connection portion 150 of the second magnetic core 144 is located in the second housing groove 142, and the second extension portion 152 is located in the through hole 140. The first frame 134 fixes the magnetic core assembly 128, which is a very important component in the transformer 50, as it can improve the efficiency and power density of the transformer 50 and reduce electrical energy loss.

[0108] In some embodiments, referring to Figures 13 and 14, the second frame 136 includes a first limit groove 154 and a second limit groove 156, the first connector 146 is located in the first limit groove 154 and limits the first magnetic core 130, the second connector 150 is located in the second limit groove 156 and limits the second magnetic core 144, and there is a gap between the first extension 148 and the second extension 152.

[0109] In this way, the gap between the first extension 148 and the second extension 152 forms an air gap 166.

[0110] Specifically, referring to Figures 13 and 14, the second frame 136 includes a first limit groove 154 and a second limit groove 156, the first connector 146 is located in the first limit groove 154 and limits the first magnetic core 130, the second connector 150 is located in the second limit groove 156 and limits the second magnetic core 144, and there is a gap between the first extension 148 and the second extension 152, i.e., an air gap 166 between the first magnetic core 130 and the second magnetic core 144. The air gap 166 between the first magnetic core 130 and the second magnetic core 144 can improve the efficiency of the transformer 50 and reduce energy loss. The design of a proper air gap 166 helps to control the flow path of magnetic flux and the magnetic field distribution, thereby making the operation of the transformer 50 more stable and reliable. In this embodiment, an appropriate air gap 166 can be obtained by rationally installing the second frame 136.

[0111] In some embodiments, referring to Figures 8, 11, and 13, the first frame 134 and the second frame 136 are detachably connected.

[0112] In this way, the first frame 134 and the second frame 136 are detachably connected, which facilitates winding the primary winding groove 116 and the secondary winding groove 118 of the first frame 134.

[0113] Specifically, referring to Figures 8, 11, and 13, the first frame 134 and the second frame 136 are detachably connected. In some embodiments, for mounting the transformer 50, windings are first made in the primary winding groove 116 and secondary winding groove 118 in the first frame 134, then the second frame 136 is attached to the first frame 134, and after mounting the first frame 134 and the second frame 136, the magnetic core assembly 128 is attached to the frame assembly 112.

[0114] In some embodiments, referring to Figures 8, 10, and 11, a plurality of fixing portions 158 are provided protruding from the outside of the top wall of the first receiving groove 138, and a plurality of rod-shaped grooves 160 are formed in the plurality of fixing portions 158.

[0115] Thus, the multiple fixing portions 158 protruding from the outside of the top wall of the first housing groove 138 increase the insulation safety distance between the secondary winding groove 118 and the first magnetic core 130, and the rod-shaped grooves 160 formed in the fixing portions 158 facilitate wiring.

[0116] Specifically, referring to Figures 8, 10, and 11, the first magnetic core 130 is provided within the first housing groove 138, the secondary winding groove 118 is spaced apart from the first magnetic core 130 via the top and side walls of the first housing groove 138, and by providing a plurality of fixing parts 158 protruding from the outside of the top wall of the first housing groove 138, the insulating safety distance between the secondary winding groove 118 and the first magnetic core 130 can be increased. In addition, rod-shaped grooves 160 are formed in the plurality of fixing parts 158, and the rod-shaped grooves 160 can be used for wiring, and in some embodiments, the rod-shaped grooves 160 can be used to fix the filament wire of the magnetron.

[0117] In some embodiments, referring to Figures 8, 10, and 15, a heat sink 40 is provided on the circuit board 10, the heat sink 40 is provided on one side where the second magnetic core 144 is located, and the frame assembly 112 further comprises a third frame 164, the third frame 164 separating the second magnetic core 144 from the heat sink 40.

[0118] In this way, the heat sink 40 can dissipate heat from the transformer 50, and the third frame 164 can increase the insulation safety distance between the second magnetic core 144 and the heat sink 40.

[0119] Specifically, referring to Figure 8, a heat sink 40 is provided on the circuit board 10, and the heat sink 40 is located on one side where the second magnetic core 144 is located. The heat sink 40 is used to dissipate heat from the transformer 50, controlling and stabilizing the temperature of the transformer 50, and preventing the performance and lifespan of the transformer 50 from being affected by an increase in the internal temperature of the transformer 50 due to excessive heat generated when current flows through the transformer 50. The frame assembly 112 further comprises a third frame 164, which separates the second magnetic core 144 from the heat sink 40. Specifically, referring to Figures 10 and 15, the third frame 164 is connected to the outside of the top wall of the second housing groove 142, extends to one side where the circuit board 10 is located, and separates the second magnetic core 144 from the heat sink 40. In this way, the insulation safety distance between the second magnetic core 144 and the heat sink 40 is increased, while the insulation safety distance between the primary winding groove 116 and the second magnetic core 144 is also increased.

[0120] In some embodiments, referring to Figures 10 and 15, the first frame 134 and the third frame 164 are detachably connected.

[0121] This facilitates the attachment of the skeletal assembly 112 and the magnetic core assembly 128.

[0122] Specifically, referring to Figures 10 and 15, the first frame 134 and the third frame 164 are detachably connected. Referring to the above, the first frame 134 and the second frame 136 are attached, and the magnetic core assembly 128 is attached, and then the third frame 164 is attached to one side of the second magnetic core 144.

[0123] The home appliance according to the embodiment of the present invention comprises a transformer 50 according to any of the above embodiments, or a circuit board 100 according to any of the above embodiments.

[0124] If the above-mentioned home appliance includes a transformer 50, the first stopper piece 120 of the frame assembly 112 covers the upper part of the groove opening of the primary winding groove 116 or the groove opening of the secondary winding groove 118, the second stopper piece 122 covers the lower part of the groove opening of the primary winding groove 116 or the groove opening of the secondary winding groove 118, facilitating the fulfillment of the insulation safety gap between the primary winding groove 116 and the secondary winding groove 118, the support piece 126 abuts against the top of the capacitor assembly 132 to fix the capacitor assembly 132, and the third stopper piece 124 covers at least a portion of the pin 114, facilitating the fulfillment of the insulation safety gap between the first magnetic core 130 and the pin 114. By increasing the height of the frame wall or the height of the frame, it is possible to avoid fulfilling the insulation safety gap, significantly reduce the volume of the transformer 50, and reduce the cost of the transformer 50.

[0125] Specifically, in the above-mentioned home appliance, the home appliance is equipped with a transformer 50, the transformer 50 includes a circuit board 100, a frame assembly 112 and a magnetic core assembly 128, the frame assembly 112 is provided on the circuit board 100 and has a primary winding groove 116 and a secondary winding groove 118, the frame assembly 112 is provided with a first stopper piece 120, a second stopper piece 122, a third stopper piece 124 and a support piece 126, along the height direction of the transformer 50, the first stopper piece 120 covers the upper part of the groove opening of the primary winding groove 116 or the groove opening of the secondary winding groove 118, the second stopper piece 122 covers the lower part of the groove opening of the primary winding groove 116 or the groove opening of the secondary winding groove 118 and the magnetic core assembly The hub 128 is provided on the frame assembly 112, the magnetic core assembly 128 comprises a first magnetic core 130, the first magnetic core 130 is provided on one side where the secondary winding groove 118 is located, the circuit board 100 has a capacitor assembly 132 on one side where the first magnetic core 130 is located, the support piece 126 abuts against the top of the capacitor assembly 132, the support piece 126 separates the first magnetic core 130 and the capacitor assembly 132 in the height direction of the transformer 50, a pin 114 is provided between the capacitor assembly 132, and a third stopper piece 124 is connected to the support piece 126 and extends to one side where the capacitor assembly 132 is located and covers at least a portion of the pin 114.

[0126] The first stopper piece 120 of the skeletal assembly 112 covers the upper part of the groove opening of the primary winding groove 116 or the groove opening of the secondary winding groove 118, the second stopper piece 122 covers the lower part of the groove opening of the primary winding groove 116 or the groove opening of the secondary winding groove 118, facilitating the meeting of the insulation safety gap between the primary winding groove 116 and the secondary winding groove 118, the support piece 126 abuts against the top of the capacitor assembly 132 to fix the capacitor assembly 132, and the third stopper piece 124 covers at least a portion of the pin 114, facilitating the meeting of the insulation safety gap between the first magnetic core 130 and the pin 114, thereby avoiding the need to meet the insulation safety gap by increasing the height of the skeletal wall or the height of the skeletal structure, the volume of the transformer 50 can be significantly reduced, and the cost of the transformer 50 can be reduced.

[0127] When the above-mentioned home appliance includes a circuit board 100, integrating the rectifier bridge stack and the insulated gate bipolar transistor into a single power device 20 makes the combined structure of the rectifier bridge stack and the insulated gate bipolar transistor more compact. This reduces the space occupied by the circuit board 100 and the volume of the circuit board 100, which is advantageous for miniaturizing the circuit board 100.

[0128] In some embodiments, the home appliance includes an inverter microwave oven.

[0129] Specifically, an inverter microwave oven can be used to heat food, adjusting the energy output according to the characteristics of the food and the cooking requirements, allowing the food to be heated more evenly, thereby achieving a more efficient cooking effect. Furthermore, an inverter microwave oven can be equipped with more precise temperature control and warming functions, meeting the needs of different types of food, and making cooking more convenient and easier to control. An inverter microwave oven may also be equipped with a frequency converter, which includes a transformer 50.

[0130] Referring to Figures 1 to 7 and Figures 8 to 19, the microwave generator 1000 according to the embodiment of the present invention comprises a circuit board 100 according to any of the above embodiments, or a transformer 50 according to any of the above embodiments.

[0131] When the microwave generator 1000 includes a circuit board 100, integrating the rectifier bridge stack and the insulated gate bipolar transistor into a single power device 20 makes the combined structure of the rectifier bridge stack and the insulated gate bipolar transistor more compact. This reduces the space occupied by the circuit board 100 and the volume of the circuit board 100, which is advantageous for miniaturizing the circuit board 100.

[0132] Specifically, the microwave generator 1000 is equipped with an inverter microwave oven. A heat dissipation air passage (not shown) is provided inside the microwave generator 1000, and the circuit board 100 can be placed in the heat dissipation air passage. By rationally designing the layout of elements on the circuit board 100 according to the heat dissipation air passage, the space occupied by the circuit board 100 can be further reduced, making the circuit board 100 smaller, which is advantageous for the overall design of the microwave generator 1000.

[0133] When the microwave generator 1000 includes a transformer 50, the first stopper piece 120 of the frame assembly 112 covers the upper part of the groove opening of the primary winding groove 116 or the groove opening of the secondary winding groove 118, the second stopper piece 122 covers the lower part of the groove opening of the primary winding groove 116 or the groove opening of the secondary winding groove 118, facilitating the fulfillment of the insulation safety gap between the primary winding groove 116 and the secondary winding groove 118, the support piece 126 abuts against the top of the capacitor assembly 132 to fix the capacitor assembly 132, and the third stopper piece 124 covers at least a portion of the pin 114, facilitating the fulfillment of the insulation safety gap between the first magnetic core 130 and the pin 114. By increasing the height of the frame wall or the height of the frame, it is possible to avoid fulfilling the insulation safety gap, significantly reduce the volume of the transformer 50, and reduce the cost of the transformer 50.

[0134] In this specification, any reference to terms such as “one embodiment,” “several embodiments,” “a certain embodiment,” “exemplary embodiment,” “example,” “specific example,” or “several examples” means that the specific features, structures, materials, or properties described with reference to such embodiment or example are included in at least one embodiment or example of the Application. In this specification, the general expressions of the above terms do not necessarily apply to the same embodiment or example. In addition, the specific features, structures, materials, or properties described may be incorporated in an appropriate manner in any one or more embodiments or examples.

[0135] While embodiments of this application have been presented and described, those skilled in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this application, and that the scope of this application is limited by the claims and their equivalents. [Cross-reference of related applications]

[0136] This application claims and incorporates by reference the priority and interests of the patent application with application number 202310802439.5, filed with the China National Intellectual Property Administration on June 30, 2023, and the priority and interests of the patent application with application number 202321710711.9, filed with the China National Intellectual Property Administration on June 30, 2023. [Explanation of Symbols]

[0137] 100 Circuit board, 10 Board, 20 Power device, 21 Rectifier diode, 22 Package, 24 Mounting hole, 26 First pin, 27 High-voltage pin, 28 Low-voltage pin, 30 Screw, 40 Heat sink, 42 ​​Heat transfer part, 44 Contact surface, 46 Top fin, 48 Side fin, 50 Transformer, 60 Bus capacitor, 70 Differential mode inductor, 80 Resonant capacitor, 82 Housing space, 112 Skeleton assembly, 114 Second pin, 116 Primary winding groove, 118 Secondary winding groove, 120 First stopper piece, 122 Second stopper piece, 124 Third stopper piece, 126 Support piece, 128 Magnetic core assembly, 130 First magnetic core, 132 Capacitor assembly, 134 First skeleton, 136 Second skeleton, 138 140 First housing groove, 142 Through hole, 142 Second housing groove, 144 Second magnetic core, 146 First connection part, 148 First extension part, 150 Second connection part, 152 Second extension part, 154 First limit groove, 156 Second limit groove, 158 Fixing part, 160 Rod-shaped groove, 164 Third skeleton, 166 Air gap, 1000 Microwave generator

Claims

1. A circuit board used in a microwave generator, wherein the circuit board is circuit board and A circuit board characterized by comprising a power device provided on the substrate, which includes an integrally integrated rectifier bridge stack and an insulated gate bipolar transistor.

2. The circuit board according to claim 1, characterized in that the power device includes a rectangular parallelepiped package.

3. The circuit board according to claim 2, characterized in that fixing holes are formed on both sides of the package body, the circuit board further comprises a heat sink provided on the board, and the package body is in close contact with the heat sink via the fixing holes.

4. The aforementioned power device is The circuit board according to claim 2 or 3, comprising a plurality of pins, wherein the plurality of pins extend downward from the package body, the power device is fixed to the substrate by the plurality of pins, the plurality of pins include a plurality of high-voltage pins and a plurality of low-voltage pins, the plurality of high-voltage pins are arranged adjacent to each other, and the plurality of low-voltage pins are arranged adjacent to each other.

5. The circuit board according to claim 3, wherein the heat sink comprises a sheet-like heat transfer portion provided on the substrate, the heat transfer portion includes a contact surface, the heat sink includes a side fin extending outward from one side of the heat transfer portion opposite to the contact surface, and a top fin extending upward from one end of the heat transfer portion furthest from the substrate, and the package body is in close contact with the contact surface.

6. The circuit board according to claim 5, wherein the circuit board includes a resonant capacitor, a housing space is formed between the top fin and the board, and the resonant capacitor is placed in the housing space.

7. The circuit board includes a transformer, and the transformer is A skeletal assembly is provided on the substrate, which has a primary winding groove and a secondary winding groove, and is provided with a first stopper piece, a second stopper piece, a third stopper piece and a support piece, and along the height direction of the transformer, the first stopper piece covers the upper part of the groove opening of the primary winding groove or the groove opening of the secondary winding groove, and the second stopper piece covers the lower part of the groove opening of the primary winding groove or the groove opening of the secondary winding groove, A circuit board according to any one of claims 1 to 3, comprising a magnetic core assembly provided on the skeletal assembly and including a first magnetic core, the first magnetic core provided on one side where the secondary winding groove is located, a capacitor assembly provided on the substrate on one side where the first magnetic core is located, a support piece abutting against the top of the capacitor assembly, the support piece separating the first magnetic core and the capacitor assembly in the height direction of the transformer, a pin provided between the capacitor assembly, and a third stopper piece connected to the support piece and extending to one side where the capacitor assembly is located to cover at least a portion of the pin.

8. The circuit board according to claim 7, wherein the skeletal assembly includes a first skeletal and a second skeletal, the primary winding groove and the secondary winding groove are provided in the first skeletal, the first stopper piece, the second stopper piece, the third stopper piece and the support piece are provided in the second skeletal, the first siding groove, through hole and second siding groove are provided in the first siding groove and through hole which are in communication with each other, the first magnetic core is located in the first siding groove and through hole, and the magnetic core assembly further includes a second magnetic core, the second magnetic core is located in the second siding groove and through hole.

9. The circuit board according to claim 8, wherein the first magnetic core includes a first connecting portion and a first extension portion, the second magnetic core includes a second connecting portion and a second extension portion, the first connecting portion is located in the first housing groove, the first extension portion is located in the through hole, the second connecting portion is located in the second housing groove, and the second extension portion is located in the through hole.

10. The circuit board according to claim 9, characterized in that the second skeleton includes a first limit groove and a second limit groove, the first connecting portion is located in the first limit groove and limits the first magnetic core, the second connecting portion is located in the second limit groove and limits the second magnetic core, and there is a gap between the first extension and the second extension.

11. The circuit board according to claim 8, characterized in that the first frame and the second frame are detachably connected.

12. The circuit board according to claim 8, characterized in that a plurality of fixing portions are provided protruding from the outer side of the top wall of the first housing groove, and a plurality of rod-shaped grooves are formed in the plurality of fixing portions.

13. The circuit board according to claim 8, characterized in that the heat sink is provided on one side where the second magnetic core is located, the skeletal assembly further comprises a third skeletal, the third skeletal is in close contact with the top fin, and the power device is provided between the third skeletal and the heat transfer section.

14. The aforementioned circuit board is It comprises a bus capacitor and a differential mode inductor, The circuit board according to claim 7, characterized in that the bus capacitor is provided between the differential mode inductor and the transformer, and the differential mode inductor and the bus capacitor are installed sequentially on the substrate.

15. It is a transformer, Circuit board and The circuit board is provided with a primary winding groove and a secondary winding groove, and a first stopper piece, a second stopper piece, a third stopper piece and a support piece are provided, and along the height direction of the transformer, the first stopper piece covers the upper part of the groove opening of the primary winding groove or the groove opening of the secondary winding groove, and the second stopper piece covers the lower part of the groove opening of the primary winding groove or the groove opening of the secondary winding groove, A transformer comprising a magnetic core assembly, provided on the skeletal assembly and including a first magnetic core, the first magnetic core being provided on one side where the secondary winding groove is located, a capacitor assembly being provided on the circuit board on one side where the first magnetic core is located, a support piece abutting against the top of the capacitor assembly, the support piece separating the first magnetic core and the capacitor assembly in the height direction of the transformer, a second pin being provided between the capacitor assembly, and a third stopper piece connected to the support piece and extending to one side where the capacitor assembly is located, covering at least a portion of the second pin.

16. The transformer according to claim 15, wherein the frame assembly includes a first frame and a second frame, the primary winding groove and the secondary winding groove are provided in the first frame, the first stopper piece, the second stopper piece, the third stopper piece and the support piece are provided in the second frame, the first frame is provided with a first housing groove, a through hole and a second housing groove which are in communication with each other, the first magnetic core is located in the first housing groove and the through hole, and the magnetic core assembly further includes a second magnetic core which is located in the second housing groove and the through hole.

17. The transformer according to claim 16, wherein the first magnetic core includes a first connecting portion and a first extension portion, the second magnetic core includes a second connecting portion and a second extension portion, the first connecting portion is located in the first housing groove, the first extension portion is located in the through hole, the second connecting portion is located in the second housing groove, and the second extension portion is located in the through hole.

18. The transformer according to claim 17, characterized in that the second frame includes a first limit groove and a second limit groove, the first connecting portion is located in the first limit groove and limits the first magnetic core, the second connecting portion is located in the second limit groove and limits the second magnetic core, and there is a gap between the first extension and the second extension.

19. The transformer according to any one of claims 16-18, characterized in that the first frame and the second frame are detachably connected.

20. The transformer according to any one of claims 16-18, characterized in that a plurality of fixing parts are provided protruding from the outside of the top wall of the first housing groove, and a plurality of rod-shaped grooves are formed on the plurality of fixing parts.

21. The transformer according to any one of claims 16-18, characterized in that a heat sink is provided on the circuit board, the heat sink is provided on one side where the second magnetic core is located, the frame assembly further comprises a third frame, the third frame separating the second magnetic core and the heat sink.

22. The transformer according to claim 21, characterized in that the first frame and the third frame are detachably connected.

23. The transformer according to any one of claims 15-17, characterized in that the second pin is the lead wire terminal of the secondary winding coil of the transformer, or the second pin is connected to the lead wire terminal of the secondary winding coil of the transformer.

24. A microwave generator characterized by comprising a circuit board according to any one of claims 1-3, or a transformer according to any one of claims 15-18.

25. A home appliance characterized by comprising a circuit board according to any one of claims 1 to 3, or a transformer according to any one of claims 15 to 18.

Images