Capacitor structure for electromagnetic induction heating

Abstract

The utility model relates to the technical field of electromagnetic induction heating devices, and provides a capacitor structure for electromagnetic induction heating, which comprises a storage box, a plurality of connecting columns and a switching mechanism, and is characterized in that two capacitors with different frequencies are arranged in the storage box; the multiple connecting columns are fixed to the storage box in a penetrating mode. The switching mechanism comprises a first guide piece, a second guide piece and a switching piece. The first guide piece and the second guide piece are electrically connected with the two connecting columns connected with one pin of the capacitor respectively. The switching sheet is selectively and electrically connected with the first guide sheet and the second guide sheet. According to the utility model, the plurality of connecting columns, the first guide sheet, the second guide sheet and the switching sheet are arranged, and the switching sheet is selectively conducted with the first guide sheet and the second guide sheet, so that capacitors with different frequencies can be respectively connected to the electromagnetic induction heating circuit through the switching sheet, thereby reducing the operation and maintenance cost of the device and improving the switching efficiency of the capacitors.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic induction heating devices, in particular to a capacitor structure for electromagnetic induction heating. Background Art

[0002] An electromagnetic induction heating device is a heating device that uses a high-frequency electromagnetic field to heat conductive materials. It has the advantages of fast heating, energy saving, environmental protection, and strong flexibility. It is widely used in metal processing, electronic component manufacturing and other fields. Capacitors, as an important component of the electromagnetic induction heating circuit system, play a role in storing and releasing electrical energy and adjusting the circuit resonant frequency.

[0003] The invention patent with publication number CN110662320A discloses a composite resonant heating circuit, which includes a power converter and a resonant heater. The power converter outputs an AC voltage with an adjustable frequency f between its two output terminals. The heating circuit also includes a resonant heater, which includes a proximal capacitor unit, a de-loop cable, and a distal resonant unit. The proximal capacitor unit, the de-loop cable, the distal resonant unit, and the loop cable are connected in sequence, and the distal resonant unit has an inherent resonant frequency f. 01 When the resonant heating circuit is working, the circuit maintains f=f 01 ,This composite resonant circuit can conveniently transmit high-frequency current to the remote end to achieve electromagnetic induction heating.

[0004] In the above technical solution, multiple series capacitors and multiple selection switches are set, and the capacitive reactances of the multiple series capacitors are unequal (that is, the frequencies of the multiple series capacitors are different). By controlling the opening and closing of different selection switches, the heating circuit can be adapted to different types of workpieces. However, the setting of multiple selection switches will not only increase the investment cost and maintenance cost of the device, but also increase the complexity of operating the selection switches. Utility Model Content

[0005] In view of this, the present invention proposes a capacitor structure for electromagnetic induction heating, which can quickly switch capacitors of different frequencies and improve the switching efficiency of the capacitors.

[0006] The technical solution of the present invention is achieved as follows: The present invention provides a capacitor structure for electromagnetic induction heating, comprising a storage box, a plurality of connecting columns and a switching mechanism, wherein:

[0007] Two capacitors with different frequencies are provided in the storage box;

[0008] A plurality of connecting posts are fixed through the storage box and are electrically connected to the two pins of the two capacitors respectively;

[0009] The switching mechanism includes a first conductive plate, a second conductive plate and a transfer plate, wherein the first conductive plate and the second conductive plate are respectively electrically connected to the two connecting posts connected to one of the pins of the capacitor; the transfer plate is selectively electrically connected to the first conductive plate and the second conductive plate.

[0010] Based on the above technical solution, preferably, the connecting column includes a first terminal, a second terminal and two third terminals, the first terminal, the second terminal and the third terminal are all fixed to the storage box, and the two pins of one of the capacitors are electrically connected to the first terminal and one of the third terminals respectively, and the two pins of the other capacitor are electrically connected to the second terminal and the other of the third terminals respectively;

[0011] The first conductive piece is electrically connected to the first terminal, and the second conductive piece is electrically connected to the second terminal.

[0012] More preferably, the switching mechanism further includes a first connecting piece and a second connecting piece, wherein:

[0013] The first connecting piece, an end of the first guide piece away from the connecting post, and an end of the second guide piece away from the connecting post are all parallel and spaced apart, and the adapter piece selectively abuts and is electrically connected between the first connecting piece and the first guide piece or between the first connecting piece and the second guide piece;

[0014] The second connecting piece is electrically connected to the two third terminals.

[0015] More preferably, a threaded hole is provided in the adapter plate, and a connecting hole is provided in both the first guide plate and the second guide plate, and the threaded hole selectively overlaps with one of the connecting holes.

[0016] More preferably, it also includes a distribution box and a plurality of terminal posts, wherein,

[0017] The distribution box is arranged on one side of the storage box;

[0018] A plurality of the binding posts are fixed through the distribution box, and the first connecting piece and the second connecting piece are electrically connected to two of the binding posts respectively.

[0019] More preferably, the adapter is rotatably arranged on the distribution box.

[0020] More preferably, the switching mechanism further includes a plurality of parallel plates, and the first terminal and the second terminal are both provided with a plurality of parallel plates, at least two of the first terminals are electrically connected through the parallel plates, and at least two of the second terminals are electrically connected through the parallel plates.

[0021] More preferably, the plurality of first terminals, the plurality of second terminals and the two third terminals are arranged in a matrix.

[0022] On the basis of the above technical solution, preferably, the first guide piece and the second guide piece are both fixedly connected to the connecting column.

[0023] More preferably, the first connecting piece includes a connecting portion and a protective portion, wherein:

[0024] The connecting portion is electrically connected to the adapter;

[0025] The protective portion is integrally formed on the connecting portion and is perpendicular thereto, and the protective portion is located between the adapter piece and the second connecting piece and is spaced apart from the second connecting piece.

[0026] The capacitor structure for electromagnetic induction heating of the utility model has the following advantages over the prior art:

[0027] (1) By providing a plurality of connecting posts, a first guide plate, a second guide plate and an adapter plate, and utilizing the selective conduction between the adapter plate and the first guide plate and the second guide plate, capacitors of different frequencies can be connected to the electromagnetic induction heating circuit respectively through the adapter plate, thereby reducing the operation and maintenance cost of the device and improving the switching efficiency of the capacitor;

[0028] (2) By integrating two capacitors of different frequencies into one storage box for switching, there is no need to set up two capacitor storage boxes, which is beneficial to the spatial layout and device integration of the capacitor structure;

[0029] (3) By providing threaded holes and connecting holes, and utilizing the cooperation of the two with bolts, the adapter plate and the first guide plate or the second guide plate can be fixed, thereby ensuring the connection stability of the electromagnetic induction heating circuit in the device;

[0030] (4) By providing the protective portion, electrical connection between the adapter plate and the second connecting plate can be avoided, thereby achieving a certain protective effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 This is a three-dimensional diagram of a capacitor structure for electromagnetic induction heating according to the present invention, located on one side of a connecting column;

[0033] Figure 2 This is a three-dimensional diagram of a capacitor structure for electromagnetic induction heating according to the present invention, located on one side of a terminal;

[0034] Figure 3 This is a three-dimensional diagram of a switching mechanism in a capacitor structure for electromagnetic induction heating according to the present invention;

[0035] Figure 4 The utility model is a circuit diagram of a connecting column and a capacitor in a capacitor structure for electromagnetic induction heating.

[0036] Among them: 1. Storage box; 2. Connecting column; 21. First terminal; 22. Second terminal; 23. Third terminal; 3. Switching mechanism; 31. First guide plate; 32. Second guide plate; 33. Adapter plate; 34. First connecting plate; 341. Connecting part; 342. Protective part; 35. Second connecting plate; 36. Parallel plate; 301. Threaded hole; 302. Connecting hole; 4. Distribution box; 5. Terminal block; 6. Capacitor. DETAILED DESCRIPTION

[0037] The following will be combined with the specific embodiments of the present invention to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] like Figure 1-4 As shown, the utility model is a capacitor structure for electromagnetic induction heating, including a storage box 1, multiple connecting columns 2, a switching mechanism 3, a distribution box 4 and multiple terminal posts 5, which are used to carry and protect various electrical components in the electromagnetic induction heating circuit, and are mainly used to allow capacitors 6 of different frequencies to be connected to the electromagnetic induction heating circuit respectively.

[0039] The storage box 1 is used to store capacitors 6 . Two capacitors 6 are arranged in the storage box 1 , and the frequencies of the two capacitors 6 are different.

[0040] The connecting column 2 is used to conduct with the pins of the capacitor 6. Multiple connecting columns 2 are fixed on the storage box 1 and are electrically connected to the two pins of the two capacitors 6 respectively; each capacitor 6 is provided with two pins, and the two capacitors 6 have a total of four pins, and the four pins are electrically connected to the four connecting columns 2 respectively.

[0041] The switching mechanism 3 is used to switch the capacitor 6 connected to the electromagnetic induction heating circuit. The switching mechanism 3 includes a first guide plate 31, a second guide plate 32 and a transfer plate 33. The first guide plate 31 and the second guide plate 32 are respectively electrically connected to two connecting posts 2 connected to one of the pins of the capacitor 6; the transfer plate 33 is selectively electrically connected to the first guide plate 31 and the second guide plate 32; specifically, the frequencies of the two capacitors 6 are 4kHz and 1.5kHz respectively, one of the pins of the capacitor 6 with a frequency of 4kHz is electrically connected to the first guide plate 31 through a connecting post 2, and one of the pins of the capacitor 6 with a frequency of 1.5kHz is electrically connected to the second guide plate 32 through another connecting post 2. When assembling the electromagnetic induction heating circuit, The adapter 33 is connected to the current input end, and the two connecting columns 2 connected to the other pins of the two capacitors 6 are connected to the current output end together, so as to form a conversion mechanism of the capacitor 6. When the adapter 33 is electrically connected to the first guide plate 31, the capacitor 6 with a frequency of 4kHz is connected to the electromagnetic induction heating circuit. When the adapter 33 is electrically connected to the second guide plate 32, the capacitor 6 with a frequency of 1.5kHz is connected to the electromagnetic induction heating circuit, thereby switching the frequency of the capacitor 6 connected to the electromagnetic induction heating circuit, so that the electromagnetic induction heating circuit can adapt to different types of workpieces; by setting the adapter 33, not only the number of switch components used can be reduced, the operation and maintenance cost of the electromagnetic induction heating device can be reduced, but also the switching complexity of the capacitor 6 can be reduced.

[0042] Depending on the components connected to the connecting column 2, the connecting column 2 can be divided into a first terminal 21, a second terminal 22 and two third terminals 23. The first terminal 21, the second terminal 22 and the third terminal 23 are all fixed on the storage box 1, and the two pins of one of the capacitors 6 are electrically connected to the first terminal 21 and one of the third terminals 23 respectively, and the two pins of the other capacitor 6 are electrically connected to the second terminal 22 and the other third terminal 23 respectively; the first guide plate 31 is electrically connected to the first terminal 21, and the second guide plate 32 is electrically connected to the second terminal 22; that is, the first terminal 21 and one of the third terminals 23 are connected in series with one of the capacitors 6, and the second terminal 22 and the other third terminal 23 are connected in series with the other capacitor 6.

[0043] In order to improve the connection convenience between the connecting column 2 and the switching mechanism 3 and the electromagnetic induction circuit, it is preferred to set a first connecting piece 34 and a second connecting piece 35 in the switching mechanism 3. The first connecting piece 34 and the end of the first guide piece 31 away from the connecting column 2 and the end of the second guide piece 32 away from the connecting column 2 are parallel and spaced apart. The adapter piece 33 selectively abuts and is electrically connected between the first connecting piece 34 and the first guide piece 31 or between the first connecting piece 34 and the second guide piece 32; the second connecting piece 35 is electrically connected to the two third terminals 23. When assembling the electromagnetic induction heating circuit, it is only necessary to connect the first connecting piece 34 and the second connecting piece 35 to the electromagnetic induction heating circuit.

[0044] The distribution box 4 is used to store other electrical components and circuits in the electromagnetic induction heating circuit except the capacitor 6 and the inductor coil. The distribution box 4 is arranged on one side of the storage box 1.

[0045] The terminal 5 is used to connect other electrical components in the electromagnetic induction heating circuit to the capacitor 6 and the inductor coil respectively. Multiple terminal posts 5 are fixed on the distribution box 4, and the first connecting piece 34 and the second connecting piece 35 are electrically connected to two of the terminal posts 5 respectively. The two ends of the inductor coil are also electrically connected to two of the terminal posts 5 respectively, so that the various electrical components in the electromagnetic induction heating circuit are connected and connected to form an electromagnetic induction heating circuit.

[0046] like Figure 3 As shown, a threaded hole 301 is provided in the adapter plate 33, and a connecting hole 302 is provided in both the first guide plate 31 and the second guide plate 32, and the threaded hole 301 selectively coincides with one of the connecting holes 302. By connecting the threaded hole 301 and one of the connecting holes 302 with bolts, the adapter plate 33 can be firmly fixed on the first guide plate 31 or the second guide plate 32, thereby avoiding the problem of loose connection of the switching mechanism 3 due to vibration; and in order to facilitate the switching movement of the adapter plate 33 and allow the threaded hole 301 inside the adapter plate 33 to quickly align with the two connecting holes 302, it is preferred that the adapter plate 33 is rotatably set on the distribution box 4 to limit the movement trajectory and movement range of the adapter plate 33.

[0047] In order to filter out high-frequency noise and stabilize the power supply voltage, multiple capacitors 6 of the same frequency are usually connected in parallel in the electromagnetic induction heating circuit. In order to facilitate the storage and connection of multiple capacitors 6, multiple first terminals 21 and second terminals 22 are provided, and the multiple first terminals 21, multiple second terminals 22 and two third terminals 23 are preferably arranged in a matrix to improve the aesthetics and regularity of the device.

[0048] For the above situation, if Figure 1 As shown, a plurality of parallel plates 36 are further provided in the switching mechanism 3, at least two first terminals 21 are electrically connected via the parallel plates 36, and at least two second terminals 22 are electrically connected via the parallel plates 36. The parallel plates 36 are selectively installed according to the number and position of the capacitors 6 actually required to be connected in parallel, which facilitates the electrical connection of the plurality of first terminals 21 with the first conductive plate 31, and also facilitates the electrical connection of the plurality of second terminals 22 with the second conductive plate 32.

[0049] like Figure 4As shown, the frequency of the six capacitors 6 on the left side of the figure is 1.5kHz, one pin of which is electrically connected to the six first terminals 21 respectively, and the other pin is electrically connected to the two third terminals 23. The frequency of the six capacitors 6 on the right side of the figure is 4kHz, one pin of which is electrically connected to the six second terminals 22 respectively, and the other pin is electrically connected to the two third terminals 23. If the adapter plate 33 is electrically connected to the first guide plate 31, the six capacitors 6 with a frequency of 1.5kHz are connected in parallel in the electromagnetic induction heating circuit.

[0050] like Figure 3 As shown, the first connecting piece 34 includes a connecting portion 341 and a protective portion 342, and the connecting portion 341 is electrically connected to the adapter piece 33; the protective portion 342 is integrally formed on the connecting portion 341 and is perpendicular to it, and the protective portion 342 is located between the adapter piece 33 and the second connecting piece 35, and the protective portion 342 is spaced apart from the second connecting piece 35. The protective portion 342 is spaced between the adapter piece 33 and the second connecting piece 35, which can prevent the adapter piece 33 from being electrically connected to the second connecting piece 35 during movement, thereby achieving a certain protective effect.

[0051] like Figure 1 As shown, in order to improve the fixing firmness of the switching mechanism 3 and the connecting column 2 , it is preferred that both the first guide piece 31 and the second guide piece 32 are fixedly connected to the connecting column 2 .

[0052] The method of using the capacitor structure for electromagnetic induction heating of the utility model is as follows:

[0053] First, place the other electrical components and circuits in the electromagnetic induction heating circuit except the capacitor 6 and the inductor coil in the distribution box 4, then place two capacitors 6 with different frequencies in the storage box 1, and connect the two pins of one of the capacitors 6 to one of the first terminals 21 and one of the third terminals 23 respectively, and connect the two pins of the other capacitor 6 to one of the second terminals 22 and the other third terminal 23 respectively. Finally, use multiple terminal posts 5 to connect the first connecting piece 34, the second connecting piece 35, the two ends of the inductor coil and the other electrical components in the distribution box 4, and rotate the adapter plate 33 to the position of the first guide plate 31 or the second guide plate 32 according to actual needs.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A capacitor structure for electromagnetic induction heating, characterized in that: It comprises a storage box (1), a plurality of connecting columns (2) and a switching mechanism (3), wherein: Two capacitors (6) with different frequencies are arranged in the storage box (1); A plurality of connecting posts (2) are fixed through the storage box (1) and are electrically connected to two pins of the two capacitors (6) respectively; The switching mechanism (3) comprises a first guide piece (31), a second guide piece (32) and a switching piece (33); the first guide piece (31) and the second guide piece (32) are respectively electrically connected to two connecting posts (2) connected to one of the pins of the capacitor (6); and the switching piece (33) is selectively electrically connected to the first guide piece (31) and the second guide piece (32).

2. The capacitor structure for electromagnetic induction heating according to claim 1, wherein: The connecting column (2) comprises a first terminal (21), a second terminal (22) and two third terminals (23); the first terminal (21), the second terminal (22) and the third terminal (23) are all fixed through the storage box (1); and the two pins of one of the capacitors (6) are electrically connected to the first terminal (21) and one of the third terminals (23), respectively; and the two pins of another capacitor (6) are electrically connected to the second terminal (22) and the other of the third terminals (23); The first conductive piece (31) is electrically connected to the first terminal (21), and the second conductive piece (32) is electrically connected to the second terminal (22).

3. The capacitor structure for electromagnetic induction heating according to claim 2, wherein: The switching mechanism (3) further includes a first connecting piece (34) and a second connecting piece (35), wherein: The first connecting piece (34), an end of the first guide piece (31) away from the connecting column (2), and an end of the second guide piece (32) away from the connecting column (2) are all parallel and spaced apart, and the adapter piece (33) selectively abuts and is electrically connected between the first connecting piece (34) and the first guide piece (31) or between the first connecting piece (34) and the second guide piece (32); The second connecting piece (35) is electrically connected to the two third terminals (23).

4. The capacitor structure for electromagnetic induction heating according to claim 3, wherein: A threaded hole (301) is provided in the adapter plate (33), and a connecting hole (302) is provided in each of the first guide plate (31) and the second guide plate (32), and the threaded hole (301) selectively overlaps with one of the connecting holes (302).

5. The capacitor structure for electromagnetic induction heating according to claim 4, characterized in that: It also includes a distribution box (4) and a plurality of terminal posts (5), wherein: The distribution box (4) is arranged on one side of the storage box (1); A plurality of the terminal posts (5) are fixed through the distribution box (4), and the first connecting piece (34) and the second connecting piece (35) are electrically connected to two of the terminal posts (5) respectively.

6. The capacitor structure for electromagnetic induction heating according to claim 5, characterized in that: The adapter plate (33) is rotatably arranged on the distribution box (4).

7. The capacitor structure for electromagnetic induction heating according to claim 2, wherein: The switching mechanism (3) further comprises a plurality of parallel plates (36), and the first terminal (21) and the second terminal (22) are both provided with a plurality of parallel plates (36). At least two of the first terminals (21) are electrically connected via the parallel plates (36), and at least two of the second terminals (22) are electrically connected via the parallel plates (36).

8. The capacitor structure for electromagnetic induction heating according to claim 7, wherein: A plurality of the first terminals (21), a plurality of the second terminals (22) and two third terminals (23) are arranged in a matrix.

9. The capacitor structure for electromagnetic induction heating according to claim 1, wherein: The first guide piece (31) and the second guide piece (32) are both fixedly connected to the connecting column (2).

10. The capacitor structure for electromagnetic induction heating according to claim 3, wherein: The first connecting piece (34) includes a connecting portion (341) and a protective portion (342), wherein: The connecting portion (341) is electrically connected to the adapter plate (33); The protective portion (342) is integrally formed on the connecting portion (341) and is perpendicular thereto, and the protective portion (342) is located between the adapter piece (33) and the second connecting piece (35) and is spaced apart from the second connecting piece (35).

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