CN108597797B

CN108597797B - Transformer and microwave cooking appliance

Info

Publication number: CN108597797B
Application number: CN201810386140.5A
Authority: CN
Inventors: 増田愼一
Original assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Priority date: 2018-04-26
Filing date: 2018-04-26
Publication date: 2024-05-31
Anticipated expiration: 2038-04-26
Also published as: CN108597797A

Abstract

The invention discloses a transformer and a microwave cooking appliance. The transformer includes an insulated bobbin and two magnetic cores. A first spacer is provided on the inner wall of the bobbin. The first spacer includes a first spacer block, a second spacer block, and a third spacer block. The first spacer is connected to the inner wall of the bobbin. The second spacing block and the third spacing block are both connected with the first spacing block. The thickness of the first spacer is smaller than the thickness of the second spacer and the thickness of the third spacer. The thickness of the second spacer is different from the thickness of the third spacer. One end of each of the two magnetic cores is separated by a first spacing block, a second spacing block or a third spacing block. In the transformer, the two magnetic cores can be abutted against the first spacing block, the second spacing block or the third spacing block according to actual requirements so as to adjust the size of the interval between the two magnetic cores, so that the transformer can meet the requirements of different specifications or models, and the cost of the transformer is lower and the production efficiency is higher as a whole.

Description

Transformer and microwave cooking appliance

Technical Field

The invention relates to the technical field of household appliances, in particular to a transformer and a microwave cooking appliance.

Background

In the related art, a transformer generally includes various windings, a magnetic core, and the like. Referring to fig. 11, two opposite magnetic cores (not shown) are separated from each other by a spacer 302 disposed on the inner wall of the insulating bobbin 301 of the bobbin 300 to maintain a fixed magnetic gap between the two magnetic cores, but the mold for manufacturing the transformer is only suitable for a transformer of one specification, and cannot be commonly used, so that the cost of the transformer is high and the production efficiency is low. When different production requirements of different transformers exist, the number of turns of the coils of the transformers are correspondingly different, so that the length-width ratio of the coils is correspondingly different, the magnetic gap is required to be reasonably adjusted to meet the coupling ratio, the mould design is required to be carried out again on the winding frameworks produced in batches, the magnetic gap is changed to meet the product requirements, and the design of the frameworks does not meet the product standardization requirements.

Disclosure of Invention

The embodiment of the invention provides a transformer and a microwave cooking appliance.

The transformer according to an embodiment of the present invention includes:

The insulation bobbin comprises an insulation bobbin, wherein a first spacer is arranged on the inner wall of the bobbin, the first spacer comprises a first spacer block, a second spacer block and a third spacer block, the first spacer block is connected to the inner wall of the bobbin, the second spacer block and the third spacer block are connected to the first spacer block, the thickness of the first spacer block is smaller than that of the second spacer block and that of the third spacer block, and the thickness of the second spacer block is different from that of the third spacer block; and

Two magnetic cores inserted in the winding tube are separated by the first spacing block or the second spacing block or the third spacing block at one ends respectively.

In the transformer of the above embodiment, since the first spacer, the second spacer and the third spacer with different thickness are provided in the bobbin, and the two magnetic cores can be abutted against the first spacer, the second spacer or the third spacer according to actual requirements to adjust the space between the two magnetic cores, the transformer can meet the requirements of different specifications or models, the cost of the transformer is low, and the production efficiency is high.

In certain embodiments, the first spacer comprises a first connection comprising a first connection connecting the first spacer block and the second spacer block and a second connection connecting the first spacer block and the third spacer block.

In some embodiments, the number of the first spacers is a plurality, the plurality of first spacers are arranged at intervals along the circumferential direction of the bobbin, the number of the first connectors is a plurality, and each of the first connectors connects each of the first spacers and the second spacers;

The number of the second connecting pieces is multiple, and each second connecting piece is connected with each first spacing block and each third spacing block.

In certain embodiments, the first spacer includes a second connection connecting the second spacer block and the third spacer block.

In certain embodiments, the thickness of the first connection is no greater than the thickness of the first spacer, and the thickness of the second connection is no greater than the smaller of the second and third spacers.

In some embodiments, the second connection part includes a plurality of third connection members, a plurality of fourth connection members, and a fifth connection member, the third connection members and the fourth connection members being alternately connected to sides of the fifth connection member in a circumferential direction of the bobbin, each of the third connection members connecting the second spacer block and the fifth connection member, each of the fourth connection members connecting the third spacer block and the fifth connection member.

In some embodiments, the second connection is located at a center of an annular structure formed by the plurality of first spacers, the second and third spacers surrounding the second connection.

In some embodiments, a winding slot is formed on the outer side of the bobbin, the transformer includes a cover part at least partially covering the winding slot, the cover part includes a second spacer corresponding to the first spacer, the second spacer includes a fourth spacer, a fifth spacer and a sixth spacer, the fifth spacer and the sixth spacer are connected to the third spacer, the thickness of the fourth spacer is the same as the thickness of the first spacer, the thickness of the fifth spacer is the same as the thickness of the second spacer, and the thickness of the sixth spacer is the same as the thickness of the third spacer;

When one ends of the two magnetic cores are respectively separated by the first spacing block, the other ends of the two magnetic cores are respectively separated by the fourth spacing block, when one ends of the two magnetic cores are respectively separated by the second spacing block, the other ends of the two magnetic cores are respectively separated by the fifth spacing block, and when one ends of the two magnetic cores are respectively separated by the third spacing block, the other ends of the two magnetic cores are respectively separated by the sixth spacing block.

In some embodiments, a winding slot is formed on the outer side of the bobbin, the winding slot includes a primary winding slot and a secondary winding slot, and the transformer includes a primary winding wound around the primary winding slot and a secondary winding wound around the secondary winding slot.

In some embodiments, the winding slot comprises a filament winding slot, the secondary winding slot is located between the filament winding slot and the primary winding slot, and the transformer comprises a filament winding wound around the filament winding slot.

The embodiment of the invention also provides a microwave cooking appliance, which comprises the transformer of any embodiment and a microwave generator, wherein the microwave generator is connected with the transformer.

In the microwave cooking appliance of the above embodiment, since the first spacer block, the second spacer block and the third spacer block with different thickness are arranged in the bobbin, and the two magnetic cores can be abutted against the first spacer block or the second spacer block or the third spacer block according to actual requirements so as to adjust the space between the two magnetic cores, the transformer can meet the requirements of different specifications or models, the cost of the transformer is low, and the production efficiency is high.

Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

Fig. 1 is a schematic structural view of a first spacer according to an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of the first spacer of fig. 1 along line L-L.

Fig. 3 is another structural schematic view of the first spacer according to the embodiment of the present invention.

Fig. 4 is a schematic cross-sectional view of a transformer according to an embodiment of the present invention.

Fig. 5 is a schematic view of a part of the structure of a transformer according to an embodiment of the present invention.

Fig. 6 is a schematic view of a structure of a transformer according to an embodiment of the present invention with a third spacer removed from a first spacer.

Fig. 7 is a schematic view of a structure of a transformer according to an embodiment of the present invention with the second spacer and the third spacer removed.

Fig. 8 is a schematic structural view of a second spacer according to an embodiment of the present invention.

Fig. 9 is another structural schematic view of the second spacer according to the embodiment of the present invention.

Fig. 10 is a schematic structural view of a microwave cooking appliance according to an embodiment of the present invention.

Fig. 11 is a schematic structural view of a bobbin of a transformer in the related art.

Description of main reference numerals:

The microwave cooking appliance 200, the transformer 100, the bobbin 10, the tube inner wall 11, the first spacer 12, the first spacer 122, the second spacer 124, the third spacer 123, the first connection 125, the first connection 1252, the second connection 1254, the second connection 127, the third connection 1272, the fourth connection 1274, the fifth connection 1276, the winding slot 14, the primary winding slot 142, the secondary winding slot 144, the primary winding 141, the secondary winding 143, the filament winding slot 146, the filament winding 145, the magnetic core 20, the cover 30, the second spacer 32, the fourth spacer 322, the fifth spacer 324, the sixth spacer 326, the microwave generator 110, the cavity 130, the cavity 150, the tray 160.

Detailed Description

Embodiments of the present invention are further described below with reference to the accompanying drawings. The same or similar reference numbers in the drawings refer to the same or similar elements or elements having the same or similar functions throughout.

In addition, the embodiments of the present invention described below with reference to the drawings are exemplary only for explaining the embodiments of the present invention and are not to be construed as limiting the present invention.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Referring to fig. 1,2 and 4, a transformer 100 is provided according to an embodiment of the present invention. The transformer 100 includes an insulated bobbin 10 and two magnetic cores 20. Two cores 20 are inserted in the bobbin 10 in pairs. The bobbin 10 is provided with a first spacer 12 on the inner wall 11 thereof. The first spacer 12 includes a first spacer block 122, a second spacer block 124, and a third spacer block 123. The first spacer 122 is attached to the inner tube wall 11 of the bobbin 10. The second spacer block 124 and the third spacer block 123 are each connected to the first spacer block 122. The thickness D1 of the first spacer 122 is less than the thickness D2 of the second spacer 124 and the thickness D3 of the third spacer 123. The thickness D2 of the second spacer 124 is different from the thickness D3 of the third spacer 123. One end of the two cores 20 is separated by a first spacer 122 or a second spacer 124 or a third spacer 123, respectively.

In the transformer 100 of the above embodiment, since the first spacer 122, the second spacer 124 and the third spacer 123 with different thicknesses are provided inside the bobbin 10, and the two magnetic cores 20 can be abutted against the first spacer 122, the second spacer 124 or the third spacer 123 according to actual requirements to adjust the space between the two magnetic cores 20, the transformer 100 can meet the requirements of different specifications or models, the cost of the transformer 100 is lower, and the production efficiency is higher as a whole.

Specifically, in one example, the insulating bobbin 10 may be a resin material. The magnetic core 20 may be a copper core or an iron core, etc.

Specifically, in the related art, a preset magnetic gap needs to be maintained between two opposite magnetic cores of the transformer according to actual requirements, so that the transformer can meet the preset magnetic gap requirements. The two cores generate eddy current losses during alternating magnetization, while the magnetic gap contributes to a reduction of the eddy current losses. In addition, the coupling ratio of the transformer is related to the size of the magnetic gap, and also to the winding stack height and winding width of the winding. That is, in order to enable the transformation to maintain a proper coupling ratio, the magnetic gap between the two cores or the winding stack height and the winding width of the winding may be adjusted. In the present embodiment, since the two magnetic cores 20 of the present embodiment may be separated by the first spacer 122 or the second spacer 124 or the third spacer 123, the transformer 100 may meet the requirements of different specifications or models, that is, the first spacer 12 of the present embodiment may adapt to the transformer 100 with three different characteristics without increasing the cost, and may enable the transformer 100 to meet the requirements of different coupling ratios, with the range of the coupling ratio stabilized between 0.5 and 1.2.

In the example of fig. 2, the thickness D1 of the first spacer 122 is smaller than the thickness D2 of the second spacer 124 and the thickness D3 of the third spacer 123, and the thickness D2 of the second spacer 124 is smaller than the thickness D3 of the third spacer 123.

Preferably, the thickness D1 of the first spacer 122 may range from 1.4mm to 1.7mm, the thickness D2 of the second spacer 124 may range from 1.9mm to 2.2mm, and the thickness D3 of the third spacer 123 may range from 2.4mm to 2.7mm.

Specifically, in certain embodiments, the first spacer block 122 may be generally continuous annular and disposed about the second and third spacer blocks 124, 123. The second spacer block 124 may comprise two spacer blocks of a generally solid fan-shaped disc, while the third spacer block 123 may also comprise two spacer blocks of a generally solid fan-shaped disc. The two spacer blocks of the second spacer block 124 and the two spacer blocks of the third spacer block 123 are alternately arranged at intervals in the circumferential direction of the bobbin, and the second spacer block 124 and the third spacer block 123 surround one discontinuous ring structure. It will be appreciated that in other embodiments, the second spacer block 124 may be a single spacer block and the third spacer block 123 may be a single spacer block.

When the magnetic gap between the two magnetic cores 20 of the transformer 100 needs to satisfy the thickness D3 of the third spacer 123, one ends of the two magnetic cores 20 may be directly abutted against both sides of the third spacer 123 (see fig. 5), and at this time, the first spacer 122 and the second spacer 124 are still connected with the third spacer 123.

When the magnetic gap between the two magnetic cores 20 of the transformer 100 needs to satisfy the thickness D2 of the second spacer 124, the connection (if any) of the third spacer 123 and the second spacer 124 may be disconnected (e.g., sheared), and the connection of the third spacer 123 and the first spacer 122 may be disconnected, so that the third spacer 123 is separated from the first spacer 12, at which time one ends of the two magnetic cores 20 may be directly abutted against both sides of the second spacer 124 (see fig. 6).

When the magnetic gap between the two magnetic cores 20 of the transformer 100 needs to satisfy the thickness D1 of the first spacer 122, the third spacer 123 may be disconnected (e.g., sheared off) from the first spacer 122 (if any), and the second spacer 124 may be disconnected from the first spacer 122, so that the second spacer 124 and the third spacer 123 are simultaneously separated from the first spacer 12, at which time one ends of the two magnetic cores 20 may be directly abutted against both sides of the first spacer 122 (see fig. 7).

In some embodiments, the first spacer 122, the second spacer 124, and the third spacer 123 may all be sheet-shaped. In one example, referring to fig. 2, the plane of the first spacer 122, the plane of the second spacer 124, and the plane of the third spacer 123 may all be located in the same plane. In another example, referring to fig. 3, the plane of the second spacer 124 and the plane of the third spacer 123 are the same, and the plane of the first spacer 122 and the plane of the second spacer 124 are different, and the positions of the first spacer 122, the second spacer 124 and the third spacer 123 are not limited herein. In other examples, the plane of the second spacer block 124, the plane of the third spacer block 123, and the plane of the first spacer block 122 are all located in different planes.

Referring to fig. 1, in some embodiments, the first spacer 12 includes a first connection 125, the first connection 125 includes a first connection 1252 and a second connection 1254, the first connection 1252 connects the first spacer 122 and the second spacer 124, and the second connection 1254 connects the first spacer 122 and the third spacer 123.

In this way, the second spacer 124 and the third spacer 123 can be fixed on the first spacer 122 by the connection between the first connector 1252 and the second connector 1254, and the second spacer 124 can be quickly disconnected from the first spacer 122 by disconnecting the first connector 1252, and the third spacer 123 can be quickly disconnected from the first spacer 122 by disconnecting the second connector 1254, so that the operation is simple.

Referring to fig. 1, in some embodiments, the number of first spacer blocks 122 is a plurality. The plurality of first spacer blocks 122 are disposed at intervals along the circumferential direction of the bobbin 10. The number of the first connection members 1252 is plural. Each first connector 1252 connects each first spacer 122 and second spacer 124. The number of the second connection members 1254 is plural. Each second connector 1254 connects each first spacer 122 and third spacer 123.

In this way, the manufacturing cost of the first spacer 12 can be reduced and the first and second connection members 1252 and 1254 can be easily disconnected.

Specifically, in one example, the plurality of first spacer blocks 122 are uniformly spaced along the circumference of the bobbin 10, which may uniformly stress the second spacer blocks 124. The first plurality of spacer blocks 122 form a discontinuous annular structure. For example, in the example shown in fig. 1, the number of the first spacer blocks 122 is 4, and 4 first spacer blocks 122 are disposed at intervals of 90 degrees in the circumferential direction of the bobbin 10. The number of the second spacing blocks 124 is 2, the number of the third spacing blocks 123 is 2, and the second spacing blocks 124 and the third spacing blocks 123 are alternately arranged in an annular structure formed by a plurality of first spacing blocks 122. Each second spacer block 124 is spaced apart from each third spacer block 123 adjacent thereto by a predetermined distance, and each second spacer block 124 has an arc of 90 degrees and each third spacer block 123 has an arc of 90 degrees.

Further, the 2 first spacers 122, the first connection 1252, and the second spacers 124, which are horizontally arranged, may be located at the same horizontal plane. The 2 first spacer blocks 122, the second connector 1254, and the third spacer block 123, which are vertically arranged, may be located on the same vertical plane.

In certain embodiments, the first spacer 12 includes a second connection 127, the second connection 127 connecting the second spacer block 124 and the third spacer block 123.

In this way, the second spacer 124 and the third spacer 123 can be connected together by the second connecting portion 127, so that the structure of the first spacer 12 is relatively stable.

Specifically, the second connection portion 127 may be located at a central position of the first spacer 12. Referring to fig. 1 and 2, in some embodiments, the second connecting portion 127 includes a plurality of third connecting members 1272, a plurality of fourth connecting members 1274 and fifth connecting members 1276, the third connecting members 1272 and fourth connecting members 1274 are alternately connected to sides of the fifth connecting members 1276 along a circumferential direction of the bobbin 10, each third connecting member 1272 connects the second spacer block 124 and the fifth connecting member 1276, and each fourth connecting member 1274 connects the third spacer block 123 and the fifth connecting member 1276.

In this way, the second spaceblock 124 and the third spaceblock 123 can be connected together by the third connector 1272, the fourth connector 1274 and the fifth connector 1276, the structure is simple, and the second spaceblock 124 and the third spaceblock 123 can be quickly disconnected by cutting the third connector 1272 or the fourth connector 1274.

Specifically, the fifth attachment member 1276 has a diamond-shaped or square-shaped configuration, and the third attachment member 1272 and the fourth attachment member 1274 may have a bar-shaped configuration. The number of third connectors 1272 is 2 and the number of fourth connectors 1274 is 2. The 2 third connecting pieces 1272 are respectively connected at two corner positions on one diagonal of the fifth connecting piece 1276, and the 2 fourth connecting pieces 1274 are respectively connected at two corner positions on the other diagonal of the fifth connecting piece 1276. The second connecting portion 127 thus formed may provide a relatively uniform connection strength to the first spacer 12.

In one embodiment, disconnecting the first connector 1252 and the third connector 1272 may allow the second spaceblock 124 to be separated from the first spacer 12 and also disconnecting the second connector 1254 and the fourth connector 1274 may allow the third spaceblock 123 to be separated from the first spacer 12, where one end of the two cores 20 may be directly abutted against opposite sides of the first spaceblock 122 (see fig. 7).

In another embodiment, breaking the second and fourth connectors 1254, 1274 may separate the third spacer 123 from the first spacer 12, at which time one end of the two cores 20 may be directly abutted against opposite sides of the second spacer 124 (see fig. 6).

In yet another embodiment, the second spacer 124 and the third spacer 123 are connected together by the second connection 127, at which time one end of the two cores 20 may be directly abutted against opposite sides of the third spacer 123 (see fig. 5).

In certain embodiments, the thickness of the first connection 125 is no greater than the thickness D1 of the first spacer 122, and the thickness of the second connection 127 is no greater than the smaller of the second and third spacers 124, 123.

In this way, the first spacer 122, the second spacer 124 and the third spacer 123 play a role of spacing, preventing the thick connecting portion from contacting one end of the magnetic cores 20 and affecting the distance between one ends of the two magnetic cores 20.

It is understood that the thickness of the first connection 125 is not greater than the thickness D1 of the first spacer 122, that is, in one example, the thickness of the first connection 125 may be equal to the thickness D1 of the first spacer 122, or in another example, the thickness of the first connection 125 may be less than the thickness D1 of the first spacer 122. The thickness of the second connection portion 127 is not greater than the smaller thickness of the second and third spacer blocks 124 and 123, that is, in one example, the thickness of the second connection portion 127 may be equal to the smaller thickness of the second and third spacer blocks 124 and 123, or in another example, the thickness of the second connection portion 127 is less than the smaller thickness of the second and third spacer blocks 124 and 123. It is noted that the thickness and location of the spacer and the connecting portion are set to ensure that the separation of the two cores 20 is achieved by the spacer, while the connection between the spacer is achieved by the connecting portion. But also the connection portion with a smaller thickness facilitates the operation when breaking the connection portion.

In some embodiments, the second connection portion 127 is located at the center of the ring-shaped structure formed by the plurality of first spacer blocks 122, and the second spacer blocks 124 and the third spacer blocks 123 surround the second connection portion 127. In this way, the first spacer has a simple and stable structure, is not easily deformed as a whole, ensures efficiency in assembling the transformer 100, and easily disconnects the second spacer 124 and the third spacer 123.

Referring to fig. 4,8 and 9, in some embodiments, a wire slot 14 is formed on the outside of the bobbin 10. The transformer 100 comprises a cover part 30, the cover part 30 at least partially covering part of the winding slot 14. The cover 30 includes a second spacer 32 that corresponds in position to the first spacer 12. The second spacer 32 includes a fourth spacer block 322, a fifth spacer block 324, and a sixth spacer block 326. The fifth spacer block 324 and the sixth spacer block 326 are each connected to the third spacer block 123. The thickness D4 of the fourth spacer blocks 322 is the same as the thickness D1 of the first spacer blocks 122. The thickness D5 of the fifth spacer 324 is the same as the thickness D2 of the second spacer 124. The thickness D6 of the sixth spacer 326 is the same as the thickness D3 of the third spacer 123.

While one ends of the two cores 20 are separated by the first spacer 122, respectively, the other ends of the two cores 20 are separated by the fourth spacer 322, respectively. While one ends of the two cores 20 are separated by the second spacer 124, respectively, the other ends of the two cores 20 are separated by the fifth spacer 324, respectively. When one ends of the two cores 20 are separated by the third spacer 123, respectively, the other ends of the two cores 20 are separated by the sixth spacer 326, respectively.

In this way, the first spacer 122 and the fourth spacer 322 are used to separate two ends of the two magnetic cores 20, the second spacer 124 and the fifth spacer 324 are used to separate two ends of the two magnetic cores 20, or the third spacer 123 and the sixth spacer 326 are used to separate two ends of the two magnetic cores 20, so that the transformer 100 can meet the requirements of different specifications or models, the cost of the transformer 100 is lower as a whole, and the production efficiency is higher.

It should be noted that the first spacer block 122 and the fourth spacer block 322 may be uniform or non-uniform in shape and size. The second spacer block 124 and the fifth spacer block 324 may be uniform or non-uniform in shape and size. The third spacer block 123 and the sixth spacer block 326 may be uniform or non-uniform in shape and size. In one embodiment, first spacer 122 is used to separate one end of two cores 20 and fourth spacer 322 is used to separate the other end of two cores 20. In another embodiment, a second spacer block 124 is used to separate one end of the two cores 20 and a fifth spacer block 324 is used to separate the other end of the two cores 20. In yet another embodiment, a third spacer 123 is used to space one end of two cores 20 and a sixth spacer 326 is used to space the other end of two cores 20. The first spacer 12 is located in a central magnetic gap a formed by one ends of the two magnetic cores 20 in the bobbin 10. The second spacer 32 is located at a space B formed by the other ends of the two cores 20 at one side of the cover 30.

Referring to fig. 4, in some embodiments, a winding slot 14 is formed at the outer side of the bobbin 10, the winding slot 14 includes a primary winding slot 142 and a secondary winding slot 144, and the transformer 100 includes a primary winding 141 wound around the primary winding slot 142 and a secondary winding 143 wound around the secondary winding slot 144. This makes the structure of the transformer 100 simple.

Specifically, the primary winding 141 and the secondary winding 143 may be wound with copper wires and aluminum wires having high electrical conductivity. In some embodiments, the primary winding 141 and the secondary winding 143 may each be a layered winding. The layered winding has compact structure and high production efficiency. In this embodiment, the primary winding slot 142 is single and the secondary winding slot 144 includes three sub-winding slots.

Referring to fig. 4, in some embodiments, the wire winding slot 14 includes a filament winding slot 146, and the secondary winding slot 144 is located between the filament winding slot 146 and the primary winding slot 142, and the transformer 100 includes a filament winding 145 wound around the filament winding slot 146. In this way, an external microwave generator can be connected via the filament winding 145, so that the microwave generator can be supplied with power.

Referring to fig. 1,2 and 10, the embodiment of the invention further provides a microwave cooking appliance 200. The microwave cooking appliance 200 includes the transformer 100 and the microwave generator 110 of any of the above embodiments. The microwave generator 110 is connected to the transformer 100.

In the microwave cooking appliance 200 of the above embodiment, since the first spacer 122, the second spacer 124 and the third spacer 123 with different thicknesses are provided inside the bobbin 10, and the two magnetic cores 20 can be abutted against the first spacer 122, the second spacer 124 or the third spacer 123 according to actual requirements to adjust the space between the two magnetic cores 20, so that the transformer 100 can meet the requirements of different specifications or models, the cost of the transformer 100 is lower as a whole, and the production efficiency is higher.

It will be appreciated that the filament winding 145 and the secondary winding 143 of the transformer 100 are connected to the microwave generator 110. Specifically, the microwave generator 110 may be a magnetron. A magnetron is an electric vacuum device used to generate microwave energy. Electrons in the magnetron interact with the high frequency electromagnetic field under the control of the constant magnetic field and the constant electric field perpendicular to each other to convert energy obtained from the output power of the transformer 100 into microwave energy, thereby achieving the purpose of generating microwave energy.

Specifically, the microwave cooking appliance 200 further includes a cavity 130, a door (not shown), and a fan 150. The tray 160 is disposed in the cavity 130, the tray 160 is used for placing food to be heated, the door body is rotatably disposed in front of the cavity 130 and is used for opening or closing the opening of the cavity 130, and the microwave generator 110 and the transformer 100 are mounted on the outer side of the cavity 130 and are disposed in the blowing direction of the fan 150. When the microwave cooking appliance 200 operates, the transformer 100 supplies an operating current to the microwave generator 110, and the microwave generator 110 generates microwave energy for heating the food in the cavity 130. Meanwhile, the fan 150 may absorb air from the outside and form an air flow, the air flow may be conducted through the air duct in the transformer 100 and cool the transformer 100, and after cooling the transformer 100, the air flow may be discharged from the transformer 100 to the outside of the microwave cooking appliance 200.

In the description of the present specification, reference to the terms "certain embodiments," "one embodiment," "some embodiments," "an exemplary embodiment," "an example," "a particular example," or "some examples" means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, unless specifically defined otherwise.

Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by those skilled in the art within the scope of the invention, which is defined by the claims and their equivalents.

Claims

1. A transformer, comprising:

the insulation bobbin comprises an insulation bobbin, wherein a first spacer is arranged on the inner wall of the bobbin, the first spacer comprises a first spacer block, a second spacer block and a third spacer block, the first spacer block is connected to the inner wall of the bobbin, the second spacer block and the third spacer block are connected with the first spacer block, the thickness of the first spacer block is smaller than that of the second spacer block and that of the third spacer block, the thickness of the second spacer block is different from that of the third spacer block, and the thickness of the second spacer block is smaller than that of the third spacer block; and

2. The transformer of claim 1, wherein the first spacer comprises a first connection comprising a first connection connecting the first spacer block and the second spacer block and a second connection connecting the first spacer block and the third spacer block.

3. The transformer of claim 2, wherein the number of first spacers is plural, the plurality of first spacers are disposed at intervals along the circumference of the bobbin, the number of first connectors is plural, and each of the first connectors connects each of the first spacers and the second spacers;

4. The transformer of claim 2, wherein the first spacer comprises a second connection portion connecting the second spacer block and the third spacer block.

5. The transformer of claim 4, wherein the thickness of the first connection is no greater than the thickness of the first spacer, and the thickness of the second connection is no greater than the smaller of the second and third spacers.

6. The transformer of claim 4, wherein the second connection portion includes a plurality of third connection members, a plurality of fourth connection members, and a fifth connection member, the third connection members and the fourth connection members being alternately connected to side surfaces of the fifth connection member in a circumferential direction of the bobbin, each of the third connection members connecting the second spacer and the fifth connection member, each of the fourth connection members connecting the third spacer and the fifth connection member.

7. The transformer of claim 4, wherein the number of first spacers is plural, the plural first spacers are disposed at intervals along the circumference of the bobbin, the second connection portion is located at the center of the ring-shaped structure formed by the plural first spacers, and the second and third spacers surround the second connection portion.

8. The transformer of claim 1, wherein a winding slot is formed on an outer side of the bobbin, the transformer includes a cover portion at least partially covering a portion of the winding slot, the cover portion includes a second spacer corresponding to the first spacer, the second spacer includes a fourth spacer, a fifth spacer, and a sixth spacer, each of the fifth spacer and the sixth spacer is connected to the third spacer, the fourth spacer has a thickness identical to a thickness of the first spacer, the fifth spacer has a thickness identical to a thickness of the second spacer, and the sixth spacer has a thickness identical to a thickness of the third spacer;

9. The transformer of claim 1, wherein a winding slot is formed at an outer side of the bobbin, the winding slot including a primary winding slot and a secondary winding slot, the transformer including a primary winding wound around the primary winding slot and a secondary winding wound around the secondary winding slot.

10. The transformer of claim 9, wherein the winding slot comprises a filament winding slot, the secondary winding slot is located between the filament winding slot and the primary winding slot, and the transformer comprises a filament winding wound around the filament winding slot.

11. A microwave cooking appliance comprising the transformer of any one of claims 1-10 and a microwave generator, the microwave generator being connected to the transformer.