Capacitor structure of microwave oven

Abstract

The utility model discloses a microwave oven capacitor structure, and belongs to the technical field of capacitor structures. The capacitor comprises two capacitor cores, one ends of the two capacitor cores are respectively provided with a leading-out component, the other ends of the two capacitor cores are connected with each other, and the upper ends of the capacitor cores are connected with at least two ohmic resistors which are connected in series with each other in parallel; according to the capacitor structure, the at least two ohmic resistors are connected in series and are connected to the upper end of the capacitor core in parallel, so that damage caused by charging high voltage can be avoided, and the problem that a resistor core rod is too large to be fully loaded into a plastic shell can also be avoided; meanwhile, the microwave oven capacitor structure is provided with the leading-out part composed of the lower connecting U-shaped plate and the two upper connecting plates, so that the installation direction of the leading-out part can be adjusted, fixing structures such as screws and the like can be conveniently fixed on the leading-out part from the upper end, and the obstruction of a plastic sleeve is avoided; therefore, the convenience and the installation efficiency of fixed connection between the terminal of the microwave oven capacitor structure and the external conductor can be effectively improved.

Description

Technical Field

[0001] The utility model relates to a microwave oven capacitor structure, in particular to a microwave oven capacitor structure, belonging to the technical field of capacitor terminals. Background Art

[0002] Microwaves are a type of electromagnetic wave. A microwave oven consists of a power supply, a magnetron, a control circuit, and a cooking chamber. The power supply provides the magnetron with a high voltage of about 4,000 volts. Under the excitation of the power supply, the magnetron continuously generates microwaves, which are then coupled into the cooking chamber through a waveguide system. Near the entrance of the cooking chamber, there is a rotatable stirrer. Because the stirrer is a fan-shaped metal, it can reflect microwaves in all directions after it is turned on, so it can evenly distribute the microwave energy in the cooking chamber, thereby heating the food. The power range of a microwave oven is generally 500 to 1,000 watts;

[0003] A Chinese patent discloses a plastic shell dry-type microwave oven capacitor, the publication number is: CN218676794U, and specifically discloses the following contents: comprising a shell, a capacitor core and a lead-out component, the capacitor core is a metallized film capacitor core, the shell comprises a plastic shell and a plastic upper cover, a concave cavity is provided on the top of the plastic shell, the metallized film capacitor core is encapsulated in the concave cavity by an insulating potting material layer, the plastic upper cover is arranged on the metallized film capacitor core and covers the opening of the concave cavity, the lead-out component is electrically connected to the metallized film capacitor core and extends out of the plastic upper cover, a discharge resistor is also electrically connected between the upper ends of the two metallized film capacitor cores, the discharge resistor is located in the concave cavity and is encapsulated by the insulating potting material layer;

[0004] The above patents have the following problems:

[0005] When the discharge resistor is used in different capacitor cores, it will be damaged due to the excessively high charging voltage. Directly replacing the resistor with a larger resistance value will result in failure to meet the conditions for installation in the plastic case.

[0006] At present, the device is provided with a U-shaped vertical lead-out component, which is a terminal. The lead-out component is used to electrically connect the capacitor to the external conductor. In order to ensure that the external conductor and the lead-out component are firmly connected to each other, a fixing structure such as screws is generally required. In order to protect the lead-out component, the device is provided with a plastic sleeve on the periphery of the lead-out component. Although the plastic sleeve plays a role in protecting the lead-out component, due to the structural setting of the lead-out component, the plastic sleeve will also affect the installation of the fixing structure such as screws, thereby affecting the stable connection between the capacitor and the external conductor.

[0007] Therefore, people are in urgent need of a microwave oven capacitor structure to solve the above-mentioned technical problems. Utility Model Content

[0008] The purpose of the utility model is to provide a microwave oven capacitor structure to solve the problems raised in the above background technology.

[0009] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0010] A microwave oven capacitor structure comprises two capacitor cores, one end of the two capacitor cores is respectively provided with a lead-out component, the other end is connected to each other, and the upper end of the capacitor core is connected in parallel with at least two pressure-bearing components connected in series;

[0011] Preferably, the pressure-bearing component is an ohmic resistor, which is used to bear the high voltage when the capacitor core is charged to avoid damage.

[0012] Preferably, the lead-out component includes a lower U-shaped plate and two upper connecting plates, the lower U-shaped plate is electrically connected to the capacitor core, the two upper connecting plates are rotatably connected to the two ends of the lower U-shaped plate, and the two upper connecting plates are provided with a through-type first fixing opening.

[0013] Preferably, the capacitor core is installed inside the shell, a plastic sleeve is provided on the top of the shell, and the pressure-bearing component is encapsulated inside the shell.

[0014] Preferably, a contact plate is fixedly connected to the inner wall of the plastic sleeve, the end of the contact plate is located inside the lower U-shaped plate, and a second fixing opening is opened on the upper part of the contact plate, and the upper connecting plate is located above the contact plate.

[0015] Preferably, the abutment plate is formed with an adapting groove at the upper opening of the second fixing opening, a screw is inserted into the first fixing opening, a nut is threadedly sleeved on the outer side of the screw, and the nut is installed in the cavity of the adapting groove.

[0016] Preferably, a nut is provided at the top end of the screw rod, and a washer is sleeved on the outer side of the screw rod, and the washer is located between the nut and the upper connecting plate.

[0017] Preferably, the two upper connecting plates are arranged to be offset with respect to each other vertically.

[0018] Preferably, a lead is connected in series between the lower end surfaces of the two capacitor cores, and the lead is arranged in a through groove formed between the two installation grooves.

[0019] Preferably, the placement groove is located between the two installation grooves and is connected to the two installation grooves.

[0020] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0021] This capacitor structure uses at least two 2W5M ohmic resistors in series and in parallel to the upper end of the capacitor core. It can be suitable for a capacitor structure with a capacitance value of 0.9±3%Uf and a nominal voltage of 2100VAC, so as to avoid damage caused by high charging voltage and the problem of the resistor core being too large to be fully loaded into the plastic shell.

[0022] The microwave oven capacitor structure is provided with a lead-out component consisting of a lower U-shaped plate and two upper connecting plates, so that the installation orientation of the lead-out component can be adjusted, so that a fixing structure such as a screw can be fixed to the lead-out component from the upper end, thereby avoiding the obstruction of the plastic sleeve, thereby effectively improving the convenience of fixed connection between the terminal of the microwave oven capacitor structure and the external conductor and the installation efficiency;

[0023] The microwave oven capacitor structure is provided with a contact plate and an adapting groove on the contact plate. The installation of the screw can be completed by simply placing the nut in the cavity of the adapting groove and then twisting the screw. Therefore, the convenience of using the screw and the nut together is effectively improved, and the convenience of fixedly connecting the terminal of the microwave oven capacitor structure with the external conductor is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 The figure is a schematic diagram of the internal circuit of the capacitor core of the utility model.

[0026] Figure 2 It is a three-dimensional schematic diagram of the utility model as a whole;

[0027] Figure 3 It is a three-dimensional schematic diagram of the capacitor core of the utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the capacitor core of the utility model;

[0029] Figure 5 It is a three-dimensional schematic diagram of the plastic sleeve of the utility model;

[0030] Figure 6 It is a three-dimensional schematic diagram of the lead-out component of the utility model;

[0031] In the figure: 2, capacitor core; 3, lead-out component; 301, lower U-shaped plate; 302, upper connecting plate; 4, first fixing port; 5, plastic sleeve; 6, gasket; 8, contact plate; 9, second fixing port; 10, adapter groove; 11, nut; 12, screw; 13, nut; 14, lead wire. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] See also Figure 1-Figure 6 The utility model provides a technical solution: a microwave oven capacitor structure, comprising two capacitor cores 2, the capacitance value of the two capacitor cores 2 is 0.9±3%Uf, the nominal voltage is 2100VAC, and one end of the two capacitor cores 2 is respectively provided with a lead-out component 3;

[0034] Figure 1 Among them, C1 and C2 are two capacitor cores 2;

[0035] The lead-out component 3 includes a lower U-shaped plate 301 and two upper connecting plates 302, wherein the lower U-shaped plate 301 is electrically connected to the capacitor core 2, and the two upper connecting plates 302 are rotatably connected to the two ends of the lower U-shaped plate 301, and the two upper connecting plates 302 are provided with a through-type first fixing opening 4, and the lower U-shaped plate 301 is arranged at the top of the capacitor core 2;

[0036] The other ends of the two capacitor cores 2 are connected to each other, and the upper end of the capacitor core 2 is connected in parallel with two ohmic resistors connected in series. The resistance of the two ohmic resistors is 2W5M, and the resistance of the series connection forms a resistance of 4W10M ohms;

[0037] Figure 1 Where R1 and R2 are two ohm resistors;

[0038] Because a single 2W10M ohm resistor is not enough to withstand the high voltage of the capacitor charging and may be damaged, and a single 4W10M ohm resistor is used because the resistor core rod is too large to fit into the plastic case, two 2W5M ohm resistors are connected in series to form a resistance value of 4W10M ohm.

[0039] During use, one of the upper connecting plates 302 is rotated to tilt horizontally, and then the movable end of the screw rod 12 is passed through the first fixing port 4 in the other upper connecting plate 302, and then the wire is wound so that the wire is located between the two upper connecting plates 302. Then, the screw rod 12 is used to simultaneously penetrate the two upper connecting plates 302, thereby facilitating the installation of the screw rod 12 and the fixing of the wire.

[0040] Two plastic sleeves 5 are installed on the upper part of the shell, and the two plastic sleeves 5 are respectively located at the notches of the two installation grooves; a contact plate 8 is fixedly connected to the inner wall of one side of the plastic sleeve 5, and the end of the contact plate 8 is located inside the lower U-shaped plate 301, and a second fixing opening 9 is opened on the upper part of the contact plate 8, and the upper connecting plate 302 is located above the contact plate 8. An adapting groove 10 is formed at the upper opening of the second fixing opening 9 of the contact plate 8, a screw 12 is inserted into the first fixing opening 4, and a nut 11 is threadedly sleeved on the outer side of the screw 12. By installing the nut 11 in the cavity of the adapting groove 10, the nut 11 is located below the upper connecting plate 302. The cavity of the adapter groove 10 is adapted to the nut 11. The nut 11 is placed in the adapter groove 10, and then the two upper connecting plates 302 are rotated, and the screw rod 12 and the wire are installed. The outer diameter of the screw rod 12 is smaller than the second fixing port 9 and the first fixing port 4, and the outer diameter of the nut 13 is larger than the second fixing port 9 and the first fixing port 4. When in use, the wire can be wound around the screw rod 12 so that the washer 6 is located between the nut 13 and the wire winding part, and then after the screw rod 12 and the nut 11 are threadedly connected, the wire winding part is clamped by the washer 6 and the uppermost upper connecting plate 302.

[0041] See also Figure 2 and Figure 3 A nut 13 is disposed at the top of the screw rod 12, and a washer 6 is sleeved on the outer side of the screw rod 12, and the washer 6 is located between the nut 13 and the upper connecting plate 302. A discharge resistor 7 is electrically connected between the upper ends of the two capacitor cores 2, and the discharge resistor 7 is installed in a placement groove provided on the upper part of the housing, and the placement groove is located between the two mounting grooves and is connected to the two mounting grooves.

[0042] See also Figure 5 A lead wire 14 is connected in series between the lower end surfaces of the two capacitor cores 2, and the lead wire 14 is arranged in a through groove formed between the two mounting grooves.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A microwave oven capacitor structure, comprising two capacitor cores (2), characterized in that: The two capacitor cores (2) are respectively provided with a lead-out component (3) at one end and are connected to each other at the other ends. At least two pressure-bearing components connected in series are connected in parallel to the upper end of the capacitor core (2).

2. A microwave oven capacitor structure according to claim 1, characterized in that: The pressure-bearing component is an ohmic resistor.

3. A microwave oven capacitor structure according to claim 1, characterized in that: The lead-out component (3) comprises a lower U-shaped plate (301) and two upper connecting plates (302), the lower U-shaped plate (301) being electrically connected to the capacitor core (2), the two upper connecting plates (302) being rotatably connected to two ends of the lower U-shaped plate (301), and the two upper connecting plates (302) being provided with a through-type first fixing opening (4).

4. A microwave oven capacitor structure according to claim 3, characterized in that: The capacitor core (2) is installed inside the shell, a plastic sleeve (5) is provided on the top of the shell, and the pressure-bearing component is encapsulated inside the shell.

5. A microwave oven capacitor structure according to claim 4, characterized in that: A contact plate (8) is fixedly connected to the inner wall of the plastic sleeve (5), the end of the contact plate (8) is located inside the lower U-shaped plate (301), and a second fixing opening (9) is provided on the upper part of the contact plate (8), and the upper connecting plate (302) is located above the contact plate (8).

6. A microwave oven capacitor structure according to claim 5, characterized in that: The contact plate (8) is formed with an adapting groove (10) at the upper opening of the second fixing opening (9); a screw rod (12) is inserted into the first fixing opening (4); a nut (11) is threadedly sleeved on the outer side of the screw rod (12); and the nut (11) is installed in the cavity of the adapting groove (10).

7. A microwave oven capacitor structure according to claim 6, characterized in that: A nut (13) is provided at the top end of the screw rod (12), and a washer (6) is sleeved on the outside of the screw rod (12), wherein the washer (6) is located between the nut (13) and the upper connecting plate (302).

8. A microwave oven capacitor structure according to claim 3, characterized in that: The two upper connecting plates (302) are arranged to be offset from each other up and down.

9. A microwave oven capacitor structure according to claim 1, characterized in that: A lead wire (14) is connected in series between the lower end surfaces of the two capacitor cores (2), and the lead wire (14) is arranged in a through groove formed between the two installation grooves.

10. A microwave oven capacitor structure according to claim 9, characterized in that: The placement groove is located between the two installation grooves and is connected with the two installation grooves.

Images