Wire coil for electromagnetic rice cooker and coiling method
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A rice cooker and electromagnetic technology, applied in applications, coil devices, household appliances, etc., can solve problems such as coil inter-turn short circuit, coil disk damage, etc.
Inactive Publication Date: 2012-11-07
江西德源欣茂铜业有限公司
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Problems solved by technology
[0004] Another object of the present invention is to provide a winding method, which can solve the problem of short
Method used
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Embodiment 1
[0040] The invention discloses a coil winding method for an electromagnetic rice cooker. The coil of the electromagnetic rice cooker includes a bracket, a magnetic strip and a stranded wire, and comprises the following steps:
[0041] (1) Divide the twisted wire into two parts;
[0042] (2) wherein a part of the twisted wires are wound on the outer surface of the support;
[0043] (3) winding another part of the stranded wire on the bottom plane of the support;
[0044] (4) Install the magnetic strip on the support.
[0045] In the above step (2) or (3), the gap between the stranded coils formed by the stranded wires is 1-5mm.
[0046] When in use, since the twisted wires are separated from each other, there is a gap between each turn of the twisted wires. In this way, compared with the current one, its advantages lie in:
[0047] 1) Increase the insulation distance between each turn to reduce the probability of inter-turn short circuit under instantaneous overvoltage and o...
Embodiment 2
[0052] Compared with Embodiment 1, the difference lies in that in step (2), some of the above-mentioned stranded wires are shaped on the support in a sparsely wound manner.
Embodiment 3
[0054] Compared with its embodiment two, the difference is:
[0055] In step (3), the other part of the stranded wires is wound on the bottom plane of the support in a spaced winding manner.
[0056] In addition, in this embodiment, the outer surface of the above-mentioned bracket is provided with a wire-holding groove, and the wire-holding groove is rotatably arranged on the outer surface of the bracket, and the twisted wire is wound in the wire-holding groove.
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Abstract
The invention discloses a wire coil for an electromagnetic rice cooker and a coiling method. The wire coil for the electromagnetic rice cooker comprises a support, a magnetic stripe and a stranded wire. The coiling method includes the following steps of firstly, dividing the stranded wire into two parts; secondly, separately coiling one part of the stranded wire on the outer surface of the support; thirdly, coiling the other part of the stranded wire on the bottom surface of the support; and fourthly, mounting the magnetic stripe on the support. During use, different parts of the stranded wire are coiled separately and gaps are reserved among turns of the stranded wire. Therefore, the wire coil compared with the prior art has the advantages that insulation distance between each two adjacent turns is increased, probability of short circuit among the turns in case of transient overvoltage and overcurrent is reduced, probability of direct short circuit among the turns as a result of failure of insulation caused by thermal ageing of insulation materials of wires is reduced, high-frequency coil loss caused by high-frequency proximity effect generated by compact arrangement of the turns is reduced, and heat of the wire coil is easy to radiate, so that uniform heating in large area of the rice cooker is facilitated.
Description
technical field [0001] The invention relates to the field of home appliances, in particular to a wire reel for an electromagnetic rice cooker and a wire winding method. Background technique [0002] The heating coils of electromagnetic rice cookers currently on the market are heated by the bottom of the pot and the wall of the pot, that is, the bottom of the pot and the wall of the pot are heated locally. The stranded wires are too tight. In addition, the method of fixing the stranded coil and the bracket is usually to use glue or heat self-adhesive. In this structure, usually the heated part will cause the temperature to be too high, while other parts are relying on potting. The body itself conducts heat, thus causing uneven heating. On the other hand, during the use of the coil disk, due to the thermal aging of the coil insulation and the instantaneous overvoltage of the coil disk, the local insulation failure of the coil often occurs, resulting in the phenomenon of inter...
Claims
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