CN2735705Y

CN2735705Y - High-frequency coil of electromagnetic oven

Info

Publication number: CN2735705Y
Application number: CN 200420107717
Authority: CN
Inventors: 吴华平; 叶纬
Original assignee: NINGBO NANYANG CATERING EQUIPMENT MANUFACTURING Co Ltd
Current assignee: NINGBO NANYANG CATERING EQUIPMENT MANUFACTURING Co Ltd
Priority date: 2004-10-22
Filing date: 2004-10-22
Publication date: 2005-10-19
Anticipated expiration: 2014-10-22

Abstract

Disclosed is a high-frequency coil of an electromagnetic oven composed of multi-strand electromagnetic wire forming cylinder soft wire, which is characterized in that high-frequency guide wire is provided with at least two parallel surfaces that are flat surfaces, the high-frequency coil is formed from the two opposite flat surfaces of the high-frequency guide wire that tightly winds with each other, and the cross section of the high-frequency guide wire is rectangular or approximately rectangular. The utility model which is suitable for manufacturing a high power electromagnetic oven makes the winding area of the high power high-frequency coil be decreased from the bigger area than the area of the bottom of a pan to the smaller area than the area of the bottom of the pan and makes eddy current heating of the high-frequency coil focused on the bottom of the pan rather than being emitted to the periphery of the bottom of the pan. The utility model can centralize heat source and can increase an utilization rate, and in addition, the high-frequency coil of the electromagnetic oven can prevent food against being scorched caused by an overheating pan wall and can save energy.

Description

The electromagnetic oven high frequency coil

Technical field

The utility model relates to the multiply high-frequency electromagnetic coil that a kind of solenoid, particularly electromagnetic kitchen range are used.

Background technology

Electromagnetic stove is according to electromagnetic induction principle, when high-frequency current passes through solenoid, just has high frequency magnetic field to produce around hot-wire coil, put this in heater coil near with the metal iron pan this moment, then have countless eddy current in the bottom of a pan and produce, these eddy current produce thermal effect, are used for heating and cooking food.Electromagnetic stove for the modern household kitchen tools are extensive use of, and progressively develops into applying of catering industry because of distinguishing features such as it is efficient, energy-saving and environmental protection, safety.

Because the kelvin effect of high-frequency current, for avoiding the copper loss of coil, heater coil adopts all generally that the multiply electromagnetic wire is stranded to form, and turns to the coil of different shape again.Square being directly proportional of the sheet resistance of the heating power of electromagnetic stove and pot and the number of ampere turns [promptly by the electric current (A) of coil and the product of coil turn (circle)] of heater coil, increase along with design power, must improve thin electromagnetism cabling number of share of stock passes through to adapt to enough big high-frequency current, such twisted wire is generally all very thick, in the process of coiling heat coil, cause the dish circular diameter of whole winding excessive, the surface heat power of iron pan induction area is descended.

Summary of the invention

The objective of the invention is by improved shape the stranded coil of multiply electromagnetic wire, make the number of share of stock of the stranded coil of multiply electromagnetic wire both satisfy the requirement of design power, make the dish circular diameter of the stranded coil of multiply electromagnetic wire satisfy the designing requirement of different shape pot body diameter again, the great-power electromagnetic cooking stove is suitable for.

Technical solution of the present utility model is, the electromagnetic oven high frequency coil, form the column flexible cord by the multiply electromagnetic wire, it is characterized in that litz wire is that to have 2 faces parallel to each other at least be the electromagnetic wire on plane, high frequency coil is close to travelling expenses by 2 opposite planar of described litz wire and is formed.

Described litz wire cross sectional shape is a rectangle or approximate rectangular.

Described high frequency coil is that the travelling expenses forming shape of being close on plane is circular flat coil, dish type circular coil or square plate formula coil by 2 opposite faces of multiply electromagnetic wire.

The direct effect of above-mentioned design is the sectional area that had both reduced the strands electromagnetic wire, also dwindle the travelling expenses area of high frequency coil, and be constant at stranded electromagnetic wire number of share of stock, dwindle the travelling expenses area of high frequency coil under the constant situation of design power, make the travelling expenses area from original becoming less than the bottom of a pan area greater than the bottom of a pan area, the high frequency coil eddy-current heating is concentrated under the bottom of a pan, and be unlikely to be dispersed into periphery, the bottom of a pan, both concentrated thermal source, increase operation rate, be unlikely to make the overheated and burning foods of pot wall again.

Description of drawings

Fig. 1 is for adopting the plate electromagnetic oven structure schematic diagram of square-section electromagnetic wire.

Fig. 2 is for adopting the basin type electromagnetic oven structure schematic diagram of square-section electromagnetic wire.

Fig. 3 is for adopting the plate electromagnetic oven structure schematic diagram of circular cross-section electromagnetic wire.

Fig. 4 is for adopting circular cross-section basin type electromagnetic oven structure schematic diagram.

Fig. 5 is the cross sectional shape schematic diagram of rectangle or approximate rectangular multiply electromagnetic wire.

Fig. 6 is high frequency coil shape and schematic cross-section thereof.

Fig. 7 is a multiply electromagnetic wire shaping mould schematic diagram.

1 is ferromagnetic material pot body among the above-mentioned figure, 2 is the devitrified glass table top, 3 is high frequency heating coil, 4 is the electromagnetic wire cross section that 2 opposite planar are parallel to each other, 5 is the cross section of square electromagnetic wire, 6 is rectangle electromagnetic wire cross section, and 7 is flat capable electromagnetic wire cross section, and 8a is circular flat high frequency heating coil, 8b is the cross section of 8a, 9a is a basin type high frequency heating coil, and 9b is the cross section of 9a, and 10a is a rectangular flat formula high frequency heating coil, 10b is the cross section of 10a, 11 is protruding roll, and 12 is groove, and 13 is recessed roll.

Embodiment

The electromagnetic wire that the circular soft electromagnetism of multiply will be become rectangle or approximate rectangular cross section has several different methods to realize, wherein with the shaper method for shaping that pressurizes, simple to operate easy, as long as with multiply braiding or stranded electromagnetic wire by the some groups of rolling dies of forming by recessed roll 13 and protruding roll 11, protruding roll 11 overlaps synthetic one group mutually with groove 12, rolling die as shown in Figure 7, stranded wire 3 is placed the recessed roll 13 of band groove 12, the protruding roll of the strap cam roll compacting electromagnetic wire 3 of exerting pressure can progressively be pressed into the square-section with circle, or approximate rectangular cross section.The multiply electromagnetic wire can be the braiding also can be stranded.As shown in Figure 6, as square 5, rectangle 6, pancake 7 or two opposite faces are plane-parallel pancake 4.9a shown in Figure 6 is that basin type high frequency coil is applicable to the cooking electromagnetic oven, 9b represents the basin form height cross section of coil frequently, every circle coil has at least 2 planes that are parallel to each other closely to contact mutually with the coil table plane on its both sides, adopting the cross section is that the soft electromagnetic wire travelling expenses of rectangle become peviform (Fig. 2), it is compared with become the heater coil (Fig. 4) of basin type with cylindrical electromagnetic wire travelling expenses, dwindled the travelling expenses area of high frequency coil under the bottom of a pan, made heating concentrate quick heating.8a shown in Figure 6 and 10a are flat heater coil, be applicable to the pan electromagnetic oven, 8a is round flat coil, 10a is the flat coil of square, every circle coil has at least 2 planes that are parallel to each other closely to contact mutually with the coil table plane on its both sides, adopt the cross section to become tabular (Fig. 1) for the rectangular electromagnetic wire travelling expenses, with become dull and stereotyped heater coil (Fig. 3) with cylindrical electromagnetic wire travelling expenses, compare and obviously dwindled the travelling expenses area of heater coil under the bottom of a pan, make under the heat accumulation the bottom of a pan the not only energy-conservation but also unlikely pot wall that burns.The rectangle litz wire is flat except travelling expenses, and peviform also can be coiled multiple shape according to the electromagnetic kitchen range shape outward, because contact-making surface is insulation and a gluing close and firm between the plane convenient electromagnetic line that is parallel to each other.Be convenient to the making of great-power electromagnetic cooking stove, power is suitable for three-phase alternating current 380V 50～60HZ power supply from 3.5KW to 15KW.

Claims

1, electromagnetic oven high frequency coil is formed the column flexible cord by the multiply electromagnetic wire, it is characterized in that litz wire is that to have 2 faces parallel to each other at least be the electromagnetic wire on plane, and high frequency coil is close to travelling expenses by 2 opposite planar of described litz wire and is formed.

2, electromagnetic oven high frequency coil according to claim 1, the cross sectional shape that it is characterized in that litz wire is a rectangle or approximate rectangular.

3, electromagnetic oven high frequency coil according to claim 1 and 2 is characterized in that the cross sectional shape of litz wire is square, rectangle, and pancake or two opposite faces are plane-parallel pancake.

4,, it is characterized in that every circle coil of high frequency coil has at least 2 planes that are parallel to each other closely to contact mutually with the coil table plane on its both sides according to claim 1 or 4 described electromagnetic oven high frequency coils.

5,, it is characterized in that high frequency coil is circular flat coil according to claim 1 or 4 described electromagnetic oven high frequency coils.

6,, it is characterized in that high frequency coil is a basin shape circular coil according to claim 1 or 4 described electromagnetic oven high frequency coils.

7,, it is characterized in that high frequency coil is a square plate formula coil according to claim 1 or 4 described electromagnetic oven high frequency coils.