Electromagnetic induction heating power box and electromagnetic induction heating device

Abstract

The utility model discloses an electromagnetic induction heating power box and an electromagnetic induction heating device. The electromagnetic induction heating power box comprises a box body, a partition plate, a fin radiator, a circuit board and a cooling fan. The partition plate divides a cavity defined by the box body into a first cavity and a second cavity. The fin radiator is arranged in the first cavity, the partition plate is provided with an opening penetrating through the first cavity and the second cavity, and the fin radiator comprises a heat conduction face exposed out of the second cavity through the opening. The circuit board is arranged in the second cavity and is mounted on the heat conducting surface; the box body is provided with a first ventilation opening and a second ventilation opening which are communicated with the first cavity, and the cooling fan is arranged at the first ventilation opening and / or the second ventilation opening. The first ventilation opening, the first cavity, the fin radiator and the second ventilation opening jointly form a heat dissipation air channel, as long as the heat dissipation fan continuously operates, heat generated by the circuit board can be continuously brought out, the electromagnetic induction heating coil can be continuously electrified to work, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a power box especially relates to a kind of electromagnetic induction heating power box and electromagnetic induction heating device. BACKGROUND

[0002] Among the parts of mechanical equipment, a part of workpieces is adopted interference fit, such as the cooperation of shaft and sleeve. Heating assembly mainly utilizes the characteristics of thermal expansion and contraction of objects, one of the two assembled parts is heated to a certain temperature, and then it is immediately assembled to the other cooperating part after expanding to a certain extent, and after cooling and shrinking, the two are tightly combined together to form a whole, achieving the purpose of hot assembly. The principle of heating disassembly and heating assembly is the same, and the workpieces with interference fit need to be heated first to expand to a certain extent before disassembly. For example, the disassembly of CVR motor rotor shaft and coupling in the nuclear power field, the disassembly of shield water pump shaft and flange, etc. The existing heater of this type is usually made by winding mica sheet around the heating wire. The heating wire is connected to the power supply device through a wire, and the power supply device has a circuit board for controlling the on-off of electricity. Due to the large thickness of some interference fit workpieces, the heating efficiency of the heating wire is limited, and the electronic components on the circuit board will gradually heat up under the working state of electricity. In order to avoid the electronic components on the circuit board from being burned due to high temperature, the heating needs to be stopped when the temperature reaches a certain level. That is, intermittent power heating is needed to complete the heating and disassembly of the workpiece safely. As a result, the workpiece heating time is long, and the work efficiency is low. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide an electromagnetic induction heating power box and an electromagnetic induction heating device to solve at least one defect in the above background art.

[0004] The utility model adopts the technical scheme that an electromagnetic induction heating power box is provided for connecting electromagnetic induction heating coil, and the electromagnetic induction heating power box includes box, partition, finned radiator, circuit board and cooling fan. The box forms a cavity, the partition is arranged in the cavity to divide the cavity into a first cavity and a second cavity. The finned radiator is arranged in the first cavity, the partition is provided with an opening penetrating the first cavity and the second cavity, and the finned radiator includes a heat-conducting surface exposed to the second cavity through the opening. The circuit board is arranged in the second cavity and mounted on the heat-conducting surface. The box is provided with at least one first ventilation opening and at least one second ventilation opening, the first ventilation opening and the second ventilation opening are respectively connected to the first cavity, and the cooling fan is arranged in the first ventilation opening and / or the second ventilation opening.

[0005] In some embodiments, the housing includes two first sides disposed opposite to each other and two second sides disposed opposite to each other, the length of the first side being less than the length of the second side, and the first vent and the second vent being disposed on the two first sides respectively.

[0006] In some embodiments, the housing is provided with at least one third ventilation opening on each of the second sides, and each of the third ventilation openings is connected to the second cavity.

[0007] In some embodiments, the surface area of ​​the finned heat sink is greater than or equal to 20 square meters; and / or, the finned heat sink forms a plurality of heat dissipation channels, the two opposite opening ends of the heat dissipation channels being directly opposite the first vent and the second vent respectively; and / or, the finned heat sink is made of metal material.

[0008] In some embodiments, the electromagnetic induction heating power supply box further includes a thermal interface material connecting the circuit board and the heat-conducting surface, wherein the circuit board is mounted on the heat-conducting surface through the thermal interface material.

[0009] In some embodiments, the circuit board includes a substrate, a resonant capacitor, and a filter capacitor. The substrate is mounted on the heat-conducting surface, and the resonant capacitor and the filter capacitor are respectively disposed on the substrate. The resonant capacitor is used to form an oscillation circuit together with the electromagnetic induction heating coil, and the filter capacitor is used to eliminate the noise generated by the oscillation circuit when the inductance and capacitance are mismatched.

[0010] In some embodiments, the electromagnetic induction heating power supply box further includes a temperature control component disposed on the box body, the temperature control component being connected to the electromagnetic induction heating coil and the circuit board respectively.

[0011] In some embodiments, the housing has a first through hole communicating with the second cavity at a position corresponding to the second cavity; the electromagnetic induction heating power supply box further includes an insulating plate and a heavy-duty socket for connecting the electromagnetic induction heating coil, the insulating plate is installed in the first through hole, and the heavy-duty socket is installed through the insulating plate; and / or, the electromagnetic induction heating power supply box further includes a power input socket, the housing has a second through hole communicating with the second cavity at a position corresponding to the second cavity, and the power input socket is installed in the second through hole; and / or, the electromagnetic induction heating power supply box further includes a mainboard controller disposed on the housing, the mainboard controller being connected to the circuit board; and / or, the electromagnetic induction heating power supply box further includes a timer disposed on the housing, the timer being connected to the circuit board; and / or, the electromagnetic induction heating power supply box further includes a control switch disposed on the housing, the control switch being connected to the circuit board.

[0012] In some embodiments, the electromagnetic induction heating power supply box further comprises a roller connected to the bottom of the box body; and / or, the electromagnetic induction heating power supply box further comprises a handle connected to the top of the box body.

[0013] The utility model also provides a kind of electromagnetic induction heating device, it includes electromagnetic induction heating coil and the electromagnetic induction heating power supply box of any one described above, the electromagnetic induction heating power supply box and the electromagnetic induction heating coil are connected, and power supply is provided for the electromagnetic induction heating coil.

[0014] The utility model has at least the following beneficial effects: because fin radiator and circuit board are arranged in the first cavity and the second cavity in the box body respectively, the circuit board installed in the second cavity is arranged on the heat-conducting surface of fin radiator, and the heat-conducting surface can conduct the heat generated by the circuit board; because the box body has the first vent and the second vent respectively connected with the first cavity, the first vent, the first cavity, the fin radiator in the first cavity and the second vent jointly form a heat dissipation air duct in communication with the outside air; because the heat dissipation fan is arranged in the first vent and / or the second vent, as long as the heat dissipation fan continuously operates, the air circulation rate in the heat dissipation air duct can be continuously accelerated, and the air in the heat dissipation air duct carries out the heat of the fin radiator after flowing through the fin radiator, so that the heat generated by the circuit board can be effectively and continuously carried out. Because the heat generated by the circuit board in the box body can be continuously carried out, the continuous temperature rise of the electronic components on the circuit board is inhibited, so that the electromagnetic induction heating coil can continuously work, until the heating and disassembly of the workpiece are completed, the workpiece heating time is shortened, and the work efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the utility model, the utility model will be further described below in combination with the drawings and embodiments, and the drawings are as follows:

[0016] Figure 1 It is the structure schematic diagram of electromagnetic induction heating power supply box in some embodiments of the utility model;

[0017] Figure 2 It is the structure schematic diagram of electromagnetic induction heating power supply box in some embodiments of the utility model; Figure 1 It is the structure schematic diagram of electromagnetic induction heating power supply box in another view of the utility model shown in the figure;

[0018] Figure 3 It is the structure schematic diagram of electromagnetic induction heating power supply box in some embodiments of the utility model, and part of the shell is hidden;

[0019] Figure 4 It is the circuit principle schematic diagram of electromagnetic induction heating device in some embodiments of the utility model. DETAILED DESCRIPTION

[0020] In order to have a clearer understanding of the technical features, objects and effects of the present application, the specific embodiments of the present application will be described in detail with reference to the drawings. In the following description, it should be understood that, unless otherwise specified and limited, the terms "mounting", "connection", "connecting", "setting" and the like should be interpreted in a broad sense, for example, they can be fixed connection, or detachable connection, or integral; they can be mechanical connection, or electrical connection; they can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements or the interaction between two elements. When an element is referred to as "on" or "under" another element, the element can be "directly" or "indirectly" on the other element, or there can be one or more intervening elements. The terms "first", "second", "third" and the like are only for the convenience of describing the technical solutions, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features with "first", "second", "third" and the like can be explicitly or implicitly included one or more of the features. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0021] As shown in Figures 1 to 3 The present application provides an electromagnetic induction heating device, which comprises an electromagnetic induction heating coil 92 and an electromagnetic induction heating power supply box. The electromagnetic induction heating power supply box and the electromagnetic induction heating coil 92 are connected to provide power for the electromagnetic induction heating coil 92. The electromagnetic induction heating coil 92 will generate eddy current in the metal workpiece near it based on the principle of electromagnetic induction in the energized state, thereby heating the metal workpiece.

[0022] As shown in Figures 1 to 3 The electromagnetic induction heating power supply box of an embodiment of the present application is shown. The electromagnetic induction heating power supply box comprises a box body, a circuit board (not shown) arranged in the box body, a heavy load socket 62 and a power input socket 63 arranged on the box body. Please refer to Figure 4 together, the heavy load socket 62 is used to connect the electromagnetic induction heating coil 92, and the power input socket 63 is used to connect the commercial power.

[0023] As shown in Figure 4As shown, the circuit board can be an intermediate frequency power control board, which is provided with at least a rectifier circuit 91 and a resonance capacitor 94. The circuit board can include an IGBT module 93 (Insulated Gate Bipolar Transistor). The circuit board is connected to the heavy load socket 62 and the power input socket 63 through wires, respectively. The power input socket 63 is connected to the mains, and inputs 220V / 380V alternating current to the rectifier circuit 91 on the circuit board. The rectifier circuit 91 converts the three-phase alternating current into direct current based on the basic principle of unidirectional conduction and cut-off of diodes or thyristors, and outputs the direct current to other circuit modules. The heavy load socket 62 is connected to the electromagnetic induction heating coil 92, and the electromagnetic induction heating coil 92 (equivalent to an inductor) and the resonance capacitor 94 together form an oscillation circuit 95. The oscillation circuit 95 is connected to the rectifier circuit 91 and inputs the direct current after rectification by the rectifier circuit 91. The oscillation circuit 95 can make the electromagnetic induction heating coil 92 obtain an oscillating current with a size and direction changing with the period. When the electromagnetic induction heating coil 92 passes through an oscillating current with a certain frequency, an alternating magnetic field with the same frequency as the current changes will be generated inside and outside the electromagnetic induction heating coil 92. Under the action of the magnetic field, an induced current with the same frequency as the electromagnetic induction heating coil 92 and opposite direction will be generated in the metal workpiece. The induced current forms a closed loop along the surface of the workpiece, which is commonly referred to as eddy current. The eddy current converts electrical energy into heat energy, rapidly heating the surface of the metal workpiece. In other words, based on the law of electromagnetic induction, when the oscillating current flows through the electromagnetic induction heating coil 92, a strong magnetic flux with high-frequency polarity change will be generated inside the electromagnetic induction heating coil 92. The metal workpiece to be heated is placed in the electromagnetic induction heating coil 92, and the strong magnetic flux will penetrate the entire workpiece to be heated. The eddy current in the opposite direction of the current of the electromagnetic induction heating coil 92 is generated inside the workpiece to be heated. Due to the internal resistance of the workpiece to be heated, when the eddy current acts on the metal workpiece, Joule heat is generated inside the workpiece, causing the temperature of the workpiece to rise rapidly, thereby achieving the purpose of heating the metal workpiece.

[0024] The electronic components on the circuit board generate a large amount of Joule heat during operation, causing the electronic components to continuously heat up. In order to avoid damage to the electronic components due to high temperature, the existing heating method cannot work continuously. In order to solve this problem, as shown in the Figures 1 to 3 The utility model provides a kind of electromagnetic induction heating power supply box, it at least includes box, partition 2, fin radiator 3, circuit board and cooling fan 4.

[0025] The box encloses a cavity, and the partition plate 2 is arranged in the cavity to divide the cavity into a first cavity 11 and a second cavity 12. The first cavity 11 is closer to the ground than the second cavity 12, that is, the first cavity 11 is a lower cavity, and the second cavity 12 is an upper cavity. Alternatively, in some other embodiments, the second cavity 12 can be closer to the ground than the first cavity 11, that is, the second cavity 12 is a lower cavity, and the first cavity 11 is an upper cavity.

[0026] The finned heat sink 3 is arranged in the first cavity 11, and the partition plate 2 is provided with an opening penetrating the first cavity 11 and the second cavity 12. The finned heat sink 3 includes a heat-conducting surface 30, and the heat-conducting surface 30 is exposed to the second cavity 12 through the opening, so that the heat-conducting surface 30 is arranged towards the second cavity 12. The circuit board is arranged in the second cavity 12 and mounted on the heat-conducting surface 30. The circuit board and the heat-conducting surface 30 can be in direct or indirect contact, so that the heat-conducting surface 30 can conduct the heat generated by the circuit board. Specifically, the circuit board includes a substrate, and the rectifier circuit 91 and the resonance capacitor 94 are arranged on the substrate. The substrate is mounted on the heat-conducting surface 30.

[0027] The box is provided with at least one first vent 13 and at least one second vent 14. That is, the number of the first vents 13 can be one or more, and the number of the second vents 14 can also be one or more. The first vent 13 and the second vent 14 are respectively in communication with the first cavity 11, so that the first vent 13, the first cavity 11, the finned heat sink 3 in the first cavity 11, and the second vent 14 together form a heat dissipation air duct in communication with the outside air. The heat dissipation fan 4 is arranged at the first vent 13 and / or the second vent 14. That is, the heat dissipation fan 4 can be arranged only at the first vent 13, the heat dissipation fan 4 can be arranged only at the second vent 14, or the heat dissipation fan 4 can be arranged at both the first vent 13 and the second vent 14. For example, Figures 1 to 3 In the illustrated embodiment, there are two heat dissipation fans 4 and two first vents 13, and each first vent 13 is provided with a heat dissipation fan 4. When the heat dissipation fan 4 is running, it can accelerate the air flow rate in the heat dissipation air duct, and the air in the heat dissipation air duct carries the heat of the finned heat sink 3 out of the cavity after flowing through the finned heat sink 3, thereby effectively carrying out the heat generated by the circuit board.

[0028] In summary, since the finned heat sink 3 and the circuit board are arranged in the first cavity 11 and the second cavity 12 respectively, the circuit board arranged in the second cavity 12 is mounted on the heat-conducting surface 30 of the finned heat sink 3, and the heat-conducting surface 30 can conduct the heat generated by the circuit board; since the cabinet has the first air vent 13 and the second air vent 14 respectively communicating with the first cavity 11, the first air vent 13, the first cavity 11, the finned heat sink 3 in the first cavity 11, and the second air vent 14 together form a heat dissipation air duct communicating with the outside air; since the heat dissipation fan 4 is arranged in the first air vent 13 and / or the second air vent 14, as long as the heat dissipation fan 4 continuously operates, the air flow rate in the heat dissipation air duct can be continuously accelerated, and the air in the heat dissipation air duct flows through the finned heat sink 3 and carries the heat of the finned heat sink 3 out of the cavity, thereby effectively and continuously carrying the heat generated by the circuit board out of the cavity. Since the heat generated by the circuit board in the cabinet can be continuously carried out, the continuous temperature rise of the electronic components on the circuit board is inhibited, so that the electromagnetic induction heating coil 92 can continuously work, until the heating and disassembly of the workpiece are completed, the workpiece heating time is shortened, and the work efficiency is improved.

[0029] As shown in FIG. 1, Figures 1 to 3 In some embodiments, the cabinet includes two first sides 15 arranged opposite to each other and two second sides 16 arranged opposite to each other. The second side 16 is perpendicular to the first side 15. The length of the first side 15 is less than the length of the second side 16, so that the first side 15 becomes the short side of the cabinet, and the second side 16 becomes the long side of the cabinet. The first air vent 13 and the second air vent 14 are arranged on the two first sides 15 respectively. Since the first air vent 13 and the second air vent 14 are arranged on the two shorter first sides 15 respectively, the heat dissipation air duct formed is long and narrow, which can carry out more heat as much as possible and reduce the temperature rise rate of the circuit board. Alternatively, in other embodiments, the first air vent 13 and the second air vent 14 can also be arranged at other positions on the cabinet, for example, the first air vent 13 and the second air vent 14 can also be arranged on the first side 15 and the second side 16 respectively.

[0030] As shown in FIG. 1, Figures 1 to 3 In some embodiments, the cabinet is provided with at least one third air vent 17 on each second side 16. That is, one of the second sides 16 is provided with at least one third air vent 17, and the other second side 16 is also provided with at least one third air vent 17. Each third air vent 17 communicates with the second cavity 12. Thus, the oppositely arranged third air vent 17 and the second cavity 12 also form a heat dissipation air duct, which can also carry out part of the heat generated by the circuit board.

[0031] In some embodiments, the surface area of ​​the finned heat sink 3 is greater than or equal to 20 square meters, so that the finned heat sink 3 has sufficient heat dissipation area. Actual measurements show that the maximum power of the corresponding electromagnetic induction heating coil 92 can exceed 320KW; at maximum power output, the temperature of the core module on the circuit board—the IGBT module 93—does not exceed 100℃, allowing for continuous operation for extended periods.

[0032] In some embodiments, the finned heat sink 3 has a plurality of heat dissipation channels 31, which are defined by the spacing between adjacent fins. The two opposite opening ends of the heat dissipation channels 31 are respectively opposite to the first vent 13 and the second vent 14. Thus, the first vent 13, the first cavity 11, the heat dissipation channels 31, and the second vent 14 together form a heat dissipation airflow channel for efficiently carrying away the heat generated by the circuit board from the cavity.

[0033] The finned heat sink 3 can be made of metal. Specifically, the material of the finned heat sink 3 can include at least one of the following: aluminum, aluminum alloy, copper, copper alloy, iron, stainless steel, etc.

[0034] In some embodiments, a thermal interface material is further included, connecting the circuit board and the thermally conductive surface 30, with the circuit board mounted on the thermally conductive surface 30 via the thermal interface material. This thermal interface material may include thermal grease, thermal silicone, thermal paste, thermal gel, phase change material, graphite sheet, sheet-like thermal gap filler, liquid thermal gap filler, etc. This thermal interface material can fill the tiny gaps between the circuit board and the thermally conductive surface 30 to reduce interfacial thermal resistance, thereby improving heat dissipation efficiency.

[0035] The oscillation frequency of the oscillation circuit 95 is related to the inductance, which in turn is related to parameters such as the size, shape, and diameter of the workpiece to be heated. For example, when heating a shaft-shaped workpiece with a diameter of 350mm, the inductance of the electromagnetic induction heating coil 92 needs to be controlled between 200 and 300 μH. Because the interference-fit workpieces to be heated in the nuclear power field have different shapes and sizes, such as the CVR motor rotor shaft and coupling, and the shielded water pump shaft and flange, the degree of fit between the same electromagnetic induction heating coil 92 and different workpieces varies. Occasionally, there may be a mismatch between the inductance and capacitance of the oscillation circuit 95, resulting in noise.

[0036] like Figure 4 As shown, in some embodiments, to eliminate noise generated by the oscillation circuit 95 when there is an inductor-capacitor mismatch, the circuit board further includes a filter capacitor 96 disposed on the substrate. The filter capacitor 96 is connected to the rectifier circuit 91. The filter capacitor 96 utilizes its charging and discharging characteristics to smooth the power supply voltage, thereby achieving the purpose of filtering. Therefore, the filter capacitor 96 can be used to eliminate noise generated by the oscillation circuit 95 when there is an inductor-capacitor mismatch.

[0037] like Figures 1 to 3 As shown, in some embodiments, the electromagnetic induction heating power supply box further includes a temperature control component mounted on the box body. The temperature control component is connected to the electromagnetic induction heating coil 92 and the circuit board, respectively, and is used to monitor and control the temperature of the electromagnetic induction heating coil 92 and the workpiece to be heated. Specifically, the temperature control component may include a thermocouple plug 51 and a temperature controller 52 mounted on the box body, a thermocouple mounted on the electromagnetic induction heating coil 92, and a wire connecting the thermocouple and the thermocouple plug 51. The thermocouple plug 51 and the temperature controller 52 are communicatively connected. The temperature controller 52 and the circuit board are communicatively connected. The thermocouple on the electromagnetic induction heating coil 92 can collect the temperature of the electromagnetic induction heating coil 92 and the workpiece to be heated in real time. This temperature information is transmitted to the temperature controller 52 via the wire. The temperature controller 52 outputs corresponding control commands to the circuit board based on the received temperature information, thereby controlling the heating power and preventing overheating of the workpiece. For example, the temperature controller 52 can compare the received temperature information with a preset temperature threshold. When the measured temperature is greater than the temperature threshold, the temperature controller 52 outputs a control signal to the circuit board to adjust the output power.

[0038] like Figures 1 to 3 As shown, in some embodiments, the housing has a first through hole corresponding to the second cavity 12, communicating with the second cavity 12. The electromagnetic induction heating power supply box also includes an insulating plate 61. The insulating plate 61 is fixed in the first through hole. A heavy-duty socket 62 is installed through the insulating plate 61. Because the output interface on the housing used to connect the electromagnetic induction heating coil 92 adopts a quick-plug, high-power heavy-duty socket 62, it can withstand a large current and a large output power, which can prevent the output interface used to connect the electromagnetic induction heating coil 92 from overheating or even causing a malfunction when outputting high current and high power. Specifically, the first through hole is located on one of the first side surfaces 15, that is, the insulating plate 61 and the heavy-duty socket 62 are located on one of the first side surfaces 15.

[0039] like Figures 1 to 3 As shown, in some embodiments, the housing has a second through hole at the position corresponding to the second cavity 12, communicating with the second cavity 12, and the power input socket 63 is installed in the second through hole. Specifically, the power input socket 63 can be located on one of the first side panels 15.

[0040] like Figures 1 to 3 As shown, in some embodiments, the electromagnetic induction heating power supply box further includes a mainboard controller 71 disposed on the box body, which is connected to the circuit board. The mainboard controller 71 is used to adjust the output power and safety protection settings. Specifically, the mainboard controller 71 may be disposed on one of the first side panels 15.

[0041] As shown in the Figures 1 to 3 embodiments, the electromagnetic induction heating power supply box further comprises a timer 72 arranged on the box body and connected with the circuit board. The timer 72 is used to control the working time of the workpiece heating. Specifically, the timer 72 can be arranged on one of the first side faces 15.

[0042] As shown in the Figures 1 to 3 embodiments, the electromagnetic induction heating power supply box further comprises a control switch 73 arranged on the box body and connected with the circuit board. The control switch 73 is used to control the on-off of the electromagnetic induction heating coil 92, thereby controlling the start and stop of the electromagnetic induction heating device. Specifically, the control switch 73 can be arranged on one of the first side faces 15.

[0043] As shown in the Figures 1 to 3 embodiments, two heat dissipation fans 4 are arranged in the two first air vents 13 respectively. The two first air vents 13 and the power input socket 63 are located on the same first side face 15. The second air vent 14, the insulating plate 61, the heavy load socket 62, the thermocouple socket, the main board controller 71, the timer 72, the temperature controller 52 and the control switch 73 are located on the same first side face 15 on the other side.

[0044] As shown in the Figures 1 to 3 embodiments, the electromagnetic induction heating power supply box further comprises a roller 81 connected to the bottom of the box body and a handle 82 connected to the top of the box body, which facilitates the movement of the electromagnetic induction heating power supply box in the nuclear power plant room.

[0045] It can be understood that the above embodiments only express the preferred embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application; it should be pointed out that for ordinary skilled in the art, the above technical features can be freely combined without departing from the concept of the present application, and some deformations and improvements can be made, which all belong to the protection scope of the present application; therefore, any equivalent transformation and modification within the scope of the claims of the present application shall belong to the scope of the claims of the present application.

Claims

1. An electromagnetic induction heating power supply box for connecting an electromagnetic induction heating coil (92), characterized by, The electromagnetic induction heating power supply box comprises a box body, a partition plate (2), a finned radiator (3), a circuit board and a cooling fan (4); The box body encloses a cavity, and the partition plate (2) is arranged in the cavity to divide the cavity into a first cavity (11) and a second cavity (12); The finned radiator (3) is arranged in the first cavity (11), the partition plate (2) is provided with an opening penetrating through the first cavity (11) and the second cavity (12), and the finned radiator (3) comprises a heat-conducting surface (30), which is exposed to the second cavity (12) through the opening; The circuit board is arranged in the second cavity (12) and mounted on the heat-conducting surface (30); The box body is provided with at least one first ventilation opening (13) and at least one second ventilation opening (14), the first ventilation opening (13) and the second ventilation opening (14) are respectively connected with the first cavity (11), and the cooling fan (4) is arranged in the first ventilation opening (13) and / or the second ventilation opening (14).

2. The electromagnetic induction heating power supply box according to claim 1, characterized in that, The box body comprises two first sides (15) arranged opposite to each other and two second sides (16) arranged opposite to each other, the length of the first side (15) is smaller than the length of the second side (16), and the first ventilation opening (13) and the second ventilation opening (14) are arranged on the two first sides (15) respectively.

3. The electromagnetic induction heating power supply box according to claim 2, characterized in that, The box body is provided with at least one third ventilation opening (17) on each second side (16), and each third ventilation opening (17) is connected with the second cavity (12).

4. The electromagnetic induction heating power supply box according to claim 1, characterized in that, The surface area of the finned radiator (3) is greater than or equal to 20 square meters; And / or, the finned radiator (3) is formed with a plurality of heat dissipation channels (31), and opposite opening ends of the heat dissipation channels (31) respectively face the first ventilation opening (13) and the second ventilation opening (14); And / or, the finned radiator (3) is made of metal material.

5. The electromagnetic induction heating power supply box according to claim 1, characterized in that, The electromagnetic induction heating power supply box further comprises a thermal interface material connected between the circuit board and the heat-conducting surface (30), and the circuit board is mounted on the heat-conducting surface (30) through the thermal interface material.

6. The electromagnetic induction heating power supply box according to claim 1, characterized in that, The circuit board comprises a substrate, a resonance capacitor (94) and a filter capacitor (96), the substrate is mounted on the heat-conducting surface (30), and the resonance capacitor (94) and the filter capacitor (96) are arranged on the substrate respectively; The resonance capacitor (94) is used to form an oscillation circuit (95) together with the electromagnetic induction heating coil (92), and the filter capacitor (96) is used to eliminate noise generated by the oscillation circuit (95) when inductance and capacitance are mismatched.

7. The electromagnetic induction heating power supply box according to claim 1, characterized in that, The electromagnetic induction heating power supply box further comprises a temperature control assembly arranged on the box body, and the temperature control assembly is connected with the electromagnetic induction heating coil (92) and the circuit board respectively.

8. The electromagnetic induction heating power supply box according to claim 1, characterized in that, The box is provided with a first through hole corresponding to the second cavity (12) and communicating with the second cavity (12); the electromagnetic induction heating power box further comprises an insulating plate (61) and a heavy load socket (62) for connecting the electromagnetic induction heating coil (92), the insulating plate (61) is installed on the first through hole, and the heavy load socket (62) is installed through the insulating plate (61); And / or, the electromagnetic induction heating power box further comprises a power input socket (63), the box is provided with a second through hole corresponding to the second cavity (12) and communicating with the second cavity (12), and the power input socket (63) is installed on the second through hole; And / or, the electromagnetic induction heating power box further comprises a mainboard controller (71) arranged on the box, and the mainboard controller (71) is connected with the circuit board; And / or, the electromagnetic induction heating power box further comprises a timer (72) arranged on the box, and the timer (72) is connected with the circuit board; And / or, the electromagnetic induction heating power box further comprises a control switch (73) arranged on the box, and the control switch (73) is connected with the circuit board.

9. The electromagnetic induction heating power supply box according to claim 1, characterized in that, The electromagnetic induction heating power box further comprises a roller (81) connected to the bottom of the box; and / or, the electromagnetic induction heating power box further comprises a handle (82) connected to the top of the box.

10. An electromagnetic induction heating device, characterized by The electromagnetic induction heating power box and the electromagnetic induction heating coil (92) are connected, and the electromagnetic induction heating power box provides power for the electromagnetic induction heating coil (92).

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