CN103561493B - Electromagnetic heating body, heating temperature control external member and method for controlling power-on and power-off of electromagnetic heater - Google Patents
Electromagnetic heating body, heating temperature control external member and method for controlling power-on and power-off of electromagnetic heater Download PDFInfo
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- CN103561493B CN103561493B CN201310561965.3A CN201310561965A CN103561493B CN 103561493 B CN103561493 B CN 103561493B CN 201310561965 A CN201310561965 A CN 201310561965A CN 103561493 B CN103561493 B CN 103561493B
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Abstract
The invention discloses an electromagnetic heating body, an electromagnetic heating temperature control external member and a method for controlling power-on and power-off of an electromagnetic heater. The electromagnetic heating body comprises a heating bottom. The hearing bottom comprises a magnetic area, a semi-magnetic area and a temperature control switch, wherein a part of the magnetic area forms a magnetic ring, the semi-magnetic area is located in the area surrounded by the magnetic ring, and the temperature control switch is arranged on the magnetic ring and used for controlling the magnetic field in the semi-magnetic area to generate induction currents or not to generate induction currents according to temperature. The following conditions S1/SR < L1 and (S1+S2)SR >=L2 are met, wherein SR is the effective heating area of the electromagnetic heater, S1 is the area of the magnetic area, S2 is the area of the semi-magnetic area, L is larger than L1 and smaller than L2, L is the working trigger point of the electromagnetic heater and L1 and L2 are constants less than L. According to the electromagnetic heating body, the heating temperature control external member and the method for controlling power-on and power-off of the electromagnetic heater, the magnetic area, the semi-magnetic area surrounded by the part of the magnetic area and the temperature control switch are arranged at the heating bottom of the electromagnetic heating body, therefore, the effective heating area of the heating bottom can change along with changes of heating temperature, and accordingly the electromagnetic heater is controlled to work continuously or stop working.
Description
Technical field
The present invention relates to electromagnetic heating technique field, particularly relate to a kind of method of electromagnetic heating body, electromagnetic heating temperature control external member and control electromagnetic heater break-make.
Background technology
In prior art, usually use the following two kinds electromagnetic temperature-controlltea mode: one, directly contact bottom the heating of electromagnetic heating body with the temperature-sensing probe of electromagnetic heater, controlled the temperature of electromagnetic heating body by temperature-sensing probe; Two, conducted heat to by microcrystal face plate on the thermistor on electromagnetic heater, realize controlling the temperature of electromagnetic heating body by thermistor.For first kind of way, due to temperature-sensing probe arranging shell, in the magnetic field of Electromagnetic Heating, the shell self of temperature-sensing probe also can generate heat, and can affect temperature controlled accuracy; For the second way, heat conduction needs certain conduction time, and heat has when conducting the control that the factors such as thermal losses affect temperature accuracy.
In sum, two kinds of electromagnetic temperature-controlltea modes of the prior art are all undesirable.
Summary of the invention
The technical problem to be solved in the present invention is, provides a kind of method of electromagnetic heating body of improvement, electromagnetic heating temperature control external member and control electromagnetic heater break-make.
The technical solution adopted for the present invention to solve the technical problems is: provide a kind of electromagnetic heating body, and comprise for coordinating bottom the heating of heating with electromagnetic heater, heating bottom comprises:
Magnetic conduction region, is made up of permeability magnetic material, wherein has at least a part of magnetic conduction region to form magnetic guiding loop;
Half magnetic conduction region, is made up of non-magnet material, and half magnetic conduction region is positioned at magnetic guiding loop around the region surrounded;
Temperature detect switch (TDS), is arranged on magnetic guiding loop, for be communicated with the comparative result of predetermined temperature threshold according to the temperature of heating bottom or to disconnect magnetic guiding loop, produces induced current maybe can not produce induced current with the magnetic field energy controlled in half magnetic conduction region in magnetic guiding loop;
Wherein, the area in magnetic conduction region and half magnetic conduction region meets following condition:
Wherein, S
rfor effective heating surface (area) (HS of electromagnetic heater, S
1for the area in magnetic conduction region, S
2be the area in half magnetic conduction region, and
L
1<L<L
2, wherein L is the work trigger point of electromagnetic heater, L
1, L
2for being less than the constant of 1.
Electromagnetic heating body of the present invention, L
1<2/11 and L
2>2/5.
Electromagnetic heating body of the present invention, magnetic guiding loop is annular, and half magnetic conduction region is circular.
Electromagnetic heating body of the present invention, magnetic guiding loop and half magnetic conduction region are annular; Magnetic conduction region also comprises the central guiding magnetic area be arranged in annular half magnetic conduction region.
Electromagnetic heating body of the present invention, temperature detect switch (TDS) is bimetal strip thermostat or the temperature control circuit comprising relay switch.
Electromagnetic heating body of the present invention, the span of predetermined temperature threshold is 70 DEG C ~ 100 DEG C.
The present invention also provides a kind of method utilizing electromagnetic heating body to control electromagnetic heater break-make, comprises the steps:
S1: the efficient heat generation area that electromagnetic heating body changes on heating bottom according to own temperature change;
S2: the area of the effective magnetic field on electromagnetic heater sensing heating bottom;
S3: electromagnetic heater judges effective heating surface (area) (HS S of efficient heat generation area and electromagnetic heater
rratio whether be more than or equal to work trigger point L, if so, then electromagnetic heater works on; If not, then electromagnetic heater quits work.
The electromagnetic heating body that utilizes of the present invention controls in the method for electromagnetic heater break-make, in step S1:
When electromagnetic heating temperature is less than or equal to predetermined temperature threshold, the temperature detect switch (TDS) conducting on magnetic guiding loop, the magnetic field in half magnetic conduction region is in effective utilization state, and efficient heat generation area is the area S in magnetic conduction region
1with the area S in half magnetic conduction region
2sum;
When electromagnetic heating temperature is greater than predetermined temperature threshold, the temperature detect switch (TDS) on magnetic guiding loop disconnects, and the magnetic field in half magnetic conduction region is in invalid utilization state, and efficient heat generation area is the area S in magnetic conduction region
1.
Electromagnetic heating body of the present invention is to the method for electromagnetic heater temperature control, and the span of predetermined temperature threshold is 70 DEG C ~ 100 DEG C.
A kind of electromagnetic heating temperature control external member is also provided, comprises above-mentioned electromagnetic heating body and for the electromagnetic heater to electromagnetic heating body Electromagnetic Heating.
Enforcement the invention has the beneficial effects as follows: utilize in Electromagnetic Heating, when the ratio of the efficient heat generation area bottom the heating of electromagnetic heating body and effective heating surface (area) (HS of electromagnetic heater is less than a definite value (namely work trigger point), electromagnetic heater stops the principle of carrying out work.By half magnetic conduction region and the temperature detect switch (TDS) arranging magnetic conduction region on bottom the heating of electromagnetic heating body, surrounded by magnetic conduction region at least partially, efficient heat generation area bottom generating heat can be changed with the variations in temperature of heating bottom, and then control electromagnetic heater work on or quit work.Therefore, the operating state that the present invention can control electromagnetic heater is accurately and timely implemented.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structural representation of embodiment one bottom the heating in electromagnetic heating body of the present invention;
Fig. 2 is the structural representation of embodiment two bottom the heating in electromagnetic heating body of the present invention.
Embodiment
In order to there be understanding clearly to technical characteristic of the present invention, object and effect, now contrast accompanying drawing and describe the specific embodiment of the present invention in detail.
The change of the present invention's design by utilizing the efficient heat generation area on electromagnetic heating body, the ratio of effective heating surface (area) (HS of efficient heat generation area and electromagnetic heater is caused to be more than or equal to or to be less than the different conditions of work trigger point, cause the principle that electromagnetic heater is turned on or off, realize electromagnetic temperature-controlltea.
As shown in Figures 1 and 2, the situation of efficient heat generation area on 100 is respectively illustrated bottom the embodiment of the present invention one and the heating of the electromagnetic heating body of embodiment two.Bottom the heating of electromagnetic heating body, 100 to coordinate with electromagnetic heater and heat.Heating bottom 100 comprises magnetic conduction region 120 and half magnetic conduction region 110.
Wherein, magnetic conduction region 120 is made up of permeability magnetic material, wherein has at least a part of magnetic conduction region 120 to form magnetic guiding loop 121.Understandably, the area on magnetic conduction region 120 is all under any circumstance belong to efficient heat generation area.
Half magnetic conduction region 110 is made up of non-magnet material, is positioned at magnetic guiding loop 121 around the region surrounded.Understandably, half magnetic conduction region 110 makes the magnetic field in half magnetic conduction region 110 be in effective utilization state or invalid utilization state according to being turned on or off of temperature detect switch (TDS) 500, namely the magnetic field in half magnetic conduction region 110 according to the change of the heating temp of electromagnetic heating body effective or invalid between change.
Magnetic guiding loop 121 is provided with temperature detect switch (TDS) 500, for to be communicated with the comparative result of predetermined temperature threshold according to the heating bottom temperature of 100 or to disconnect magnetic guiding loop 121, in magnetic guiding loop 121, produce induced current with the magnetic field energy controlled in half magnetic conduction region 110 and maybe can not produce induced current, to change the efficient heat generation area of heating bottom, thus control the break-make of electromagnetic heater.
The area in magnetic conduction region 120 and half magnetic conduction region 110 meets following condition:
Wherein, S
rfor effective heating surface (area) (HS of electromagnetic heater, S
1for the area in magnetic conduction region 120, S
2be the area in half magnetic conduction region 110, and
L
1<L<L
2, wherein L is the work trigger point of electromagnetic heater, L
1, L
2for being less than the constant of 1.
When the temperature of electromagnetic heating body is less than or equal to the predetermined temperature threshold of temperature detect switch (TDS) 500, temperature detect switch (TDS) 500 conducting, efficient heat generation area is except the area S in magnetic conduction region 120
1in addition, also comprise the area of magnetic guiding loop 121 enclosing region, i.e. the area S in half magnetic conduction region 110
2, now efficient heat generation area increases; When the temperature of electromagnetic heating body is greater than predetermined temperature threshold, temperature detect switch (TDS) 500 disconnects, and efficient heat generation area is only the area S in magnetic conduction region 120
1, now efficient heat generation area reduces.Thus, magnetic conduction region 120 can change the efficient heat generation area on heating bottom 100 with the variations in temperature of electromagnetic heating body.According to condition (1), the area sum in magnetic conduction region 120 and half magnetic conduction region 110 and the ratio of the effective heating surface (area) (HS of electromagnetic heater are more than or equal to work trigger point, namely
the ratio of the area in magnetic conduction region 120 and the effective heating surface (area) (HS of electromagnetic heater is less than work trigger point, namely
Principle according to electromagnetic heater: when electromagnetic heater detects that efficient heat generation area is more than or equal to work trigger point L with the ratio of effective heating surface (area) (HS, electromagnetic heater works on; When electromagnetic heater detects that efficient heat generation area is less than work trigger point L with the ratio of effective heating surface (area) (HS, electromagnetic heater quits work.Achieve electromagnetic heating body to control electromagnetic heater when the ratio of efficient heat generation area and effective heating surface (area) (HS is more than or equal to work trigger point and work on; Electromagnetic heating body controls electromagnetic heater when the ratio of efficient heat generation area and effective heating surface (area) (HS is less than work trigger point and quits work.
In the embodiment one shown in Fig. 1, magnetic conduction region 120 comprises magnetic guiding loop 121 and central guiding magnetic area 122.Magnetic guiding loop 121, half magnetic conduction region 110 and central guiding magnetic area 122 is followed successively by from outside to inside in the figure of embodiment one.
Magnetic guiding loop 121 is provided with temperature detect switch (TDS) 500, and magnetic guiding loop 121 is the annular arranged along periphery, heating bottom 100.
Half magnetic conduction region 110 is arranged in magnetic guiding loop 121, and half magnetic conduction region 110 is also annular, half magnetic conduction region 110 and the concyclic heart of magnetic guiding loop 121.
Central guiding magnetic area 122 is for being arranged on the circle in half magnetic conduction region 110 circular annular region.Understandably, half magnetic conduction region 110, magnetic guiding loop 121 and the concyclic heart of central guiding magnetic area 122.
Understandably, magnetic guiding loop 121 and half magnetic conduction region 110 also can be set to the ring of other shapes, such as Q-RING, straight-flanked ring, and central guiding magnetic area 122 is square, rectangle.Or magnetic guiding loop 121 is annular, half magnetic conduction region 110 is round outside but spuare inside shape ring, and central guiding magnetic area 122 is square, etc.
In the embodiment two shown in Fig. 2, be followed successively by magnetic guiding loop 121 and half magnetic conduction region 110 from outside to inside.
Magnetic conduction region 120 is the annular magnetic guiding loop 121 being provided with temperature detect switch (TDS) 500, and magnetic guiding loop 121 is arranged along periphery, heating bottom 100.
Half magnetic conduction region 110 is arranged in magnetic guiding loop 121, half magnetic conduction region 110 and the concyclic heart of magnetic guiding loop 121.
Understandably, magnetic guiding loop 121 also can be set to the ring of other shapes, such as Q-RING, straight-flanked ring, and half magnetic conduction region 110 is square, rectangle.Magnetic guiding loop 121 is round outside but spuare inside shape ring, and half magnetic conduction region 110 is square, otherwise or, magnetic guiding loop 121 is square-outside and round-inside shape ring, and half magnetic conduction region 110 is circular.
The present invention also conceives a kind of method utilizing electromagnetic heating body to control electromagnetic heater break-make.
Electromagnetic heating body of the present invention controls the method for electromagnetic heater break-make, comprises the steps:
S1: the efficient heat generation area that electromagnetic heating body changes on heating bottom 100 according to own temperature change.
Magnetic conduction region 120 is made up of permeability magnetic material.Heating bottom 100 also arrange be made up of non-magnet material, to make according to the change of the heating bottom temp of electromagnetic heating body the magnetic field in magnetic conduction region 120 effective or invalid between change, the half magnetic conduction region 110 that is positioned at 120 regions in magnetic conduction region; Magnetic conduction region 120 arranges one and carries out according to the heating bottom temp of electromagnetic heating body the temperature detect switch (TDS) 500 that is turned on or off below or above predetermined temperature threshold.
When the heating bottom temp of electromagnetic heating body is less than or equal to predetermined temperature threshold, temperature detect switch (TDS) 500 is in conducting state, and half magnetic conduction region 110 is in closed magnetic guiding loop 121, and efficient heat generation area is the area S in magnetic conduction region 120
1with the area S in half magnetic conduction region 110
2sum; When the heating temp of electromagnetic heating body is greater than predetermined temperature threshold, temperature detect switch (TDS) 500 is in off-state, and half magnetic conduction region 110 is in nonocclusive magnetic guiding loop 121, and efficient heat generation area is the area S in magnetic conduction region 120
1.
S2: the efficient heat generation area on electromagnetic heater sensing heating bottom 100.
S3: electromagnetic heater judges effective heating surface (area) (HS S of efficient heat generation area and electromagnetic heater
rratio whether be more than or equal to work trigger point L, if so, then electromagnetic heater works on; If not, then electromagnetic heater quits work.
Wherein, when the heating bottom temp of electromagnetic heating body is less than or equal to predetermined temperature threshold, the temperature detect switch (TDS) 500 on magnetic guiding loop 121 is in conducting state, and half magnetic conduction region 110 is in closed magnetic guiding loop 121, and effective heating surface (area) (HS is the area S in magnetic conduction region 120
1with the area S in half magnetic conduction region 110
2sum,
electromagnetic heater works on; When the heating bottom temp of electromagnetic heating body is greater than predetermined temperature threshold, the temperature detect switch (TDS) 500 on magnetic guiding loop 121 is in off-state, and half magnetic conduction region 110 is in nonocclusive magnetic guiding loop 121, and effective heating surface (area) (HS is the area S in magnetic conduction region 120
1,
Electromagnetic heater quits work.
The present invention can be applicable to the electromagnetic heating temperature control external member of electromagnetic oven (electromagnetic heater) and the composition such as supporting electromagnetic cooker, electromagnetic pot (electromagnetic heating body), such as, comprise electromagnetic heating body and both electromagnetic heaters cooperation for carrying out Electromagnetic Heating to this electromagnetic heating body in above-described embodiment one or embodiment two and realize temperature control.
Preferably, L
1>2/11 and L
2<2/5, namely the span of the work trigger point L of electromagnetic heater is 2/11 ~ 2/5 usually.Understandably, L can also get the value being less than 2/11, also can get be greater than 2/5 and be less than 1 value, the value of L1, L2 also needs to adjust accordingly in this case.
In various embodiments of the present invention, understandably, temperature detect switch (TDS) 500 is bimetal strip thermostat or the temperature control circuit comprising relay switch.The span of predetermined temperature threshold is preferably 70 DEG C ~ 100 DEG C.
Understandably, non-magnet material is the combination of one or more in plastics or glass.
Preferably, permeability magnetic material is ferrous material.
The above is only the preferred embodiment of the present invention, protection scope of the present invention be not only confined to above-described embodiment, and all technical schemes belonged under thinking of the present invention all belong to protection scope of the present invention.It should be pointed out that for those skilled in the art, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. an electromagnetic heating body, comprising for coordinating with electromagnetic heater bottom the heating of heating (100), it is characterized in that, described heating bottom (100) comprising:
Magnetic conduction region (120), is made up of permeability magnetic material, wherein has at least a part of described magnetic conduction region (120) to form magnetic guiding loop (121);
Half magnetic conduction region (110), is made up of non-magnet material, and described half magnetic conduction region (110) is positioned at described magnetic guiding loop (121) around the region surrounded;
Temperature detect switch (TDS) (500), be arranged on described magnetic guiding loop (121), for to be communicated with the comparative result of predetermined temperature threshold according to the heating bottom temperature of (100) or to disconnect described magnetic guiding loop (121), maybe induced current can not be produced with the magnetic field energy controlled in described half magnetic conduction region (110) at described magnetic guiding loop (121) middle generation induced current;
Wherein, the area in described magnetic conduction region (120) and described half magnetic conduction region (110) meets following condition:
Wherein, S
rfor effective heating surface (area) (HS of electromagnetic heater, S
1for the area of described magnetic conduction region (120), S
2for the area in described half magnetic conduction region (110), and
L
1< L < L
2, wherein L is the work trigger point of electromagnetic heater, L
1, L
2for being less than the constant of 1.
2. electromagnetic heating body according to claim 1, is characterized in that, L
1< 2/11 and L
2> 2/5.
3. electromagnetic heating body according to claim 1, is characterized in that, described magnetic guiding loop (121) is annular, and described half magnetic conduction region (110) is circular.
4. electromagnetic heating body according to claim 1, is characterized in that, described magnetic guiding loop (121) and described half magnetic conduction region (110) are annular; Described magnetic conduction region (120) also comprises the central guiding magnetic area (122) be arranged in described annular half magnetic conduction region.
5. electromagnetic heating body according to any one of claim 1 to 4, is characterized in that, described temperature detect switch (TDS) (500) is bimetal strip thermostat or the temperature control circuit comprising relay switch.
6. electromagnetic heating body according to any one of claim 1 to 4, is characterized in that, the span of described predetermined temperature threshold is 70 DEG C ~ 100 DEG C.
7. utilize electromagnetic heating body according to any one of claim 1 to 6 to control a method for electromagnetic heater break-make, it is characterized in that, comprising:
S1: the efficient heat generation area that electromagnetic heating body changes on described heating bottom (100) according to own temperature change;
S2: the efficient heat generation area on described heating bottom (100) of electromagnetic heater sensing;
S3: electromagnetic heater judges effective heating surface (area) (HS S of described efficient heat generation area and described electromagnetic heater
rratio whether be more than or equal to work trigger point L, if so, then electromagnetic heater works on; If not, then electromagnetic heater quits work.
8. the method utilizing electromagnetic heating body to control electromagnetic heater break-make according to claim 7, is characterized in that, in described step S1:
When described electromagnetic heating temperature is less than or equal to predetermined temperature threshold, temperature detect switch (TDS) (500) conducting on magnetic guiding loop (121), the magnetic field in half magnetic conduction region (110) is in effective utilization state, and described efficient heat generation area is the area S in magnetic conduction region (120)
1with the area S in described half magnetic conduction region (110)
2sum;
When described electromagnetic heating temperature is greater than predetermined temperature threshold, temperature detect switch (TDS) (500) on magnetic guiding loop (121) disconnects, the magnetic field in half magnetic conduction region (110) is in invalid utilization state, and described efficient heat generation area is the area S of described magnetic conduction region (120)
1.
9. the method utilizing electromagnetic heating body to control electromagnetic heater break-make according to claim 8, it is characterized in that, the span of described predetermined temperature threshold is 70 DEG C ~ 100 DEG C.
10. an electromagnetic heating temperature control external member, is characterized in that, comprises electromagnetic heating body according to any one of claim 1 to 6 and for the electromagnetic heater to described electromagnetic heating body Electromagnetic Heating.
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|---|---|---|---|
| CN201310561965.3A CN103561493B (en) | 2013-11-12 | 2013-11-12 | Electromagnetic heating body, heating temperature control external member and method for controlling power-on and power-off of electromagnetic heater |
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|---|---|---|---|
| CN201310561965.3A CN103561493B (en) | 2013-11-12 | 2013-11-12 | Electromagnetic heating body, heating temperature control external member and method for controlling power-on and power-off of electromagnetic heater |
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|---|---|
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| CN103561493B true CN103561493B (en) | 2015-07-08 |
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| CN102172100A (en) * | 2008-09-30 | 2011-08-31 | Bsh博施及西门子家用器具有限公司 | Cooktop and method for operating a cooktop |
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| US9282593B2 (en) * | 2011-06-03 | 2016-03-08 | General Electric Company | Device and system for induction heating |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102172100A (en) * | 2008-09-30 | 2011-08-31 | Bsh博施及西门子家用器具有限公司 | Cooktop and method for operating a cooktop |
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