CN102221227A - Anti-dry protection device for electromagnetic oven cooker - Google Patents
Anti-dry protection device for electromagnetic oven cooker Download PDFInfo
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- CN102221227A CN102221227A CN 201110123162 CN201110123162A CN102221227A CN 102221227 A CN102221227 A CN 102221227A CN 201110123162 CN201110123162 CN 201110123162 CN 201110123162 A CN201110123162 A CN 201110123162A CN 102221227 A CN102221227 A CN 102221227A
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- sensitive element
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Abstract
The invention relates to an anti-dry protection device for an electromagnetic oven cooker, comprising a light-transmitting panel (1), a coil disc (2), a main control plate (3) and a base (4), wherein the coil disc (2) and the main control plate (3) are arranged in the base (4). The anti-dry protection device is characterized by also comprising at least one photosensitive element (5) which is capable of inducting the dry and the reddening of the cooker to generate resistance change, is arranged in the base (4) by a photosensitive element support (6), is positioned below a heating zone of the light-previous panel (1) and is electrically connected with the main control plate (3). The anti-dry protection device creatively adopts the photosensitive element to judge the heating condition of the heated cooker on the electromagnetic oven cooker so as to prevent and control the dry burning of the cooker, therefore, the induction is fast, the precision is high, and the protection device has no signal delay, is not influenced by the installation environment, and can timely and accurately conduct the dry judgment and protection on the cooker.
Description
Technical field
The present invention relates to a kind of anti-dry protective device of electromagnetic oven pan, belong to the improvement technology of electromagnetic oven safeguard protection.
Background technology
At present; generally all there is the pattern of various ink silk screen printing the ceramic panel below of commercially available electromagnetic oven; the printing ink heatproof is generally about 300 degree; molten soft out of shape or come off because of the overheated ink for screen printing that causes probably when pan generation dry combustion method; not only influence attractive in appearance; and have bigger potential safety hazard, if protection is untimely, might lead to fire because of printing ink is on fire.
Mostly existing anti-dry protection scheme is to realize by the thermistor that is close to the ceramic panel lower surface, because ceramic panel has certain heat transfer process, the be heated precision of thermometric of thermistor there is bigger influence, causes thermistor can not detect the variation of pan bottom temp accurately and rapidly; Simultaneously, thermistor itself has certain signal lag, can not be in time provides control signal for the control system of electromagnetic oven; In addition, when boilers from drying burning or other overheat condition took place, the pan bottom also can cause the thermistor position not influence the precision that thermistor detects because of reaching the overheated the bottom of a pan because temperature distortion causes with the part of ceramic panel and contacts.
Summary of the invention
The objective of the invention is to consider the problems referred to above and a kind of light intensity that utilizes light-sensitive element to come the bottom of heated pot on the inductive electromagnetic stove to send is provided, and judge that according to the light-sensitive element change in resistance heating intensity is with control with prevent the protective device of boilers from drying burning.
Technical scheme of the present invention is: a kind of electromagnetic oven pan anti-dry protective device; comprise light-permeable panel, coil panel, master board and base; wherein coil panel and master board device are in base; it is characterized in that also comprising that at least one can respond to that boilers from drying burning reddens and the light-sensitive element that produces change in resistance; light-sensitive element passes through the light-sensitive element holder device in base; and be positioned at the below of light-permeable panel heating region, and be electrically connected with master board.
Described light-sensitive element support is installed in the below of coil panel, or is installed between coil panel and the light-permeable panel.
One end of described light-sensitive element support is installed on the support of coil panel, and the other end is positioned at the below of light-permeable panel heating region, and light-sensitive element is installed in the other end of light-sensitive element support.
Described light-sensitive element support is strip, one end is its middle groove that clamps light-sensitive element that is provided with of cylinder, the other end back side is provided with the location and installation post, the back side, middle part is in the form of slot and be provided with the buckle that is used to take in the light-sensitive element lead-in wire more than a group, and screw passes the through hole that is provided with on the coil bracket and screws the location and installation post light-sensitive element support is packed on the coil bracket.
The place, slit that the described interior light-sensitive element of groove that is installed on the light-sensitive element support just is positioned on the coil panel can directly respond to the situation that boilers from drying burning reddens.
Described light-sensitive element is photo resistance, photodiode, photocell or photoelectricity FET.
The employing of the invention light-sensitive element judge that the heating situation of heated pot on the electromagnetic oven is to prevent and to control boilers from drying burning; not only induction is quick, precision is high; and self does not have signal lag; simultaneously not influenced by installation environment, can make boilers from drying burning judgement and protection in time, accurately.
Description of drawings
Fig. 1 is the assembly structure schematic diagram of electromagnetic oven pan dry combustion method protective device of the present invention.
Fig. 2 is the outline drawing of electromagnetic oven of the present invention.
Fig. 3 is that the A-A of Fig. 2 is to cross-sectional view.
Fig. 4 is the assembly structure schematic diagram of light-sensitive element of the present invention and light-sensitive element support;
Fig. 5 is the upward view of Fig. 4;
Fig. 6 is the vertical view of Fig. 4;
Fig. 7 is that the A-A of Fig. 6 is to cross-sectional view;
Fig. 8 handles the circuit theory diagrams of light-sensitive element output signal for electromagnetic oven of the present invention.
Above accompanying drawing has all omitted with the present invention and has designed other irrelevant parts of main points.
The specific embodiment
Below in conjunction with drawings and Examples the specific embodiment of the present invention is further described.
As Fig. 1; Fig. 2; shown in Figure 3; electromagnetic oven pan anti-dry protective device of the present invention; comprise light-permeable panel 1; coil panel 2; master board 3; base 4; can respond to that boilers from drying burning reddens and light-sensitive element 5 and two light-sensitive element supports 6 of producing change in resistance for two; wherein coil panel 2 and master board 3 devices are in base 4; two light-sensitive element support 6 devices are below coil panel 2; the one end is packed on the support of coil panel 2; the other end is positioned at the below of light-permeable panel 1 heating region; light-sensitive element 5 is installed in the other end of light-sensitive element support 6; the place, slit that just is positioned on the coil panel 2 can directly respond to the situation that boilers from drying burning reddens, and is electrically connected with master board 3.
Shown in Fig. 4,5,6,7, described light-sensitive element support 6 is strip, one end is big slightly its middle groove 61 that clamps light-sensitive element 5 that is provided with of cylinder, the other end back side is provided with location and installation post 63, the back side, middle part is in the form of slot and be provided with the buckle 62 that is used to take in light-sensitive element lead-in wire 51 more than a group, and screw 7 passes the through hole that is provided with on the coil bracket and screws location and installation post 63 light-sensitive element support 6 is packed on coil panel 2 supports.
Described light-sensitive element 5 is photo resistance, photodiode, photocell or photoelectricity FET etc.In the present embodiment, described light-sensitive element 5 employing models are 5617 photo resistance.
Electromagnetic oven is handled the circuit of light-sensitive element output signal as shown in Figure 8, comprise single-chip microcomputer IC1, resistance R 1 and capacitor C 1, one end of resistance R 1 links to each other with the positive pole of dc source, the other end is connected the other end ground connection of capacitor C 1 (being the negative pole of dc source) with an end of photo resistance 5, an end of capacitor C 1 and the AD input of single-chip microcomputer IC1.
The operation principle of present embodiment is, the coiling gap that light can see through light-permeable panel and coil panel shines in the photo resistance, and the resistance of light-sensitive element can change with the power of light, the optical signal of being sensed can be sent to the electromagnetic oven master board by its connecting line.Electromagnetic oven is when operate as normal because the blocking of pan, shine in the photo resistance available light seldom, the photo resistance value is bigger, the voltage of AD output is bigger; When reddening when pan generation dry combustion method, photo resistance RT1 is along with the enhancing of transmitted ray, and resistance value diminishes; the voltage decreases of AD output; single-chip microcomputer changes by this judges that rapidly dry combustion method has taken place pan, and master board stops power output, reaches the purpose of dry combustion method protection.
Claims (6)
1. electromagnetic oven pan anti-dry protective device; comprise light-permeable panel (1), coil panel (2), master board (3) and base (4); wherein coil panel (2) and master board (3) device is in base (4); it is characterized in that also comprising that at least one can respond to that boilers from drying burning reddens and the light-sensitive element (5) that produces change in resistance; light-sensitive element (5) installs in base (4) by light-sensitive element support (6); and be positioned at the below of light-permeable panel (1) heating region, and be electrically connected with master board (3).
2. electromagnetic oven pan anti-dry protective device according to claim 1 is characterized in that described light-sensitive element support (6) is installed in the below of coil panel, or is installed between coil panel and the light-permeable panel (1).
3. electromagnetic oven pan anti-dry protective device according to claim 1 and 2; an end that it is characterized in that described light-sensitive element support (6) is installed on the support of coil panel (2); the other end is positioned at the below of light-permeable panel (1) heating region, and light-sensitive element (5) is installed in the other end of light-sensitive element support (6).
4. electromagnetic oven pan anti-dry protective device according to claim 3; it is characterized in that described light-sensitive element support (6) is strip; one end is its middle groove (61) that clamps light-sensitive element (5) that is provided with of cylinder; the other end back side is provided with location and installation post (63); the back side, middle part is in the form of slot and be provided with the buckle (62) that is used to take in light-sensitive element lead-in wire (51) more than a group, and screw (7) passes the through hole that is provided with on the coil bracket and screws location and installation post (63) light-sensitive element support (6) is packed on coil panel (2) support.
5. electromagnetic oven pan anti-dry protective device according to claim 4 is characterized in that the place, slit that the described interior light-sensitive element (5) of groove (61) that is installed on light-sensitive element support (6) just is positioned on the coil panel (2) can directly respond to the situation that boilers from drying burning reddens.
6. electromagnetic oven pan anti-dry protective device according to claim 5 is characterized in that described light-sensitive element (5) is photo resistance, photodiode, photocell or photoelectricity FET.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110123162 CN102221227B (en) | 2011-05-13 | 2011-05-13 | Anti-dry protection device for electromagnetic oven cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110123162 CN102221227B (en) | 2011-05-13 | 2011-05-13 | Anti-dry protection device for electromagnetic oven cooker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102221227A true CN102221227A (en) | 2011-10-19 |
| CN102221227B CN102221227B (en) | 2013-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110123162 Active CN102221227B (en) | 2011-05-13 | 2011-05-13 | Anti-dry protection device for electromagnetic oven cooker |
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| Country | Link |
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| CN (1) | CN102221227B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109838820A (en) * | 2017-11-29 | 2019-06-04 | 佛山市顺德区美的电热电器制造有限公司 | Dry combustion method detection method, dry combustion method detection device and electric cooking apparatus |
| CN109869756A (en) * | 2017-12-05 | 2019-06-11 | 佛山市顺德区美的电热电器制造有限公司 | Heating platform |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB526262A (en) * | 1939-03-10 | 1940-09-13 | Lewis Eng Co | Improvements in self-balancing potentiometer systems for controlling, indicating and recording variable conditions |
| FR2417737A1 (en) * | 1978-02-16 | 1979-09-14 | Stein Surface | Heating oven with conveyor and induction coils - has photoelectric cells to monitor appearance of black streaks |
| CN200993420Y (en) * | 2006-12-25 | 2007-12-19 | 佛山市顺德区美的家电实业有限公司 | Safety reliable electromagnetic oven |
| CN201393916Y (en) * | 2008-11-19 | 2010-02-03 | 庄梅兰 | Electronic infrared burnout-proof alarm induction cooker |
| CN202074583U (en) * | 2011-05-13 | 2011-12-14 | 佛山市顺德区美的电热电器制造有限公司 | Dry burning prevention and protection device for pan of induction cooker |
-
2011
- 2011-05-13 CN CN 201110123162 patent/CN102221227B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB526262A (en) * | 1939-03-10 | 1940-09-13 | Lewis Eng Co | Improvements in self-balancing potentiometer systems for controlling, indicating and recording variable conditions |
| FR2417737A1 (en) * | 1978-02-16 | 1979-09-14 | Stein Surface | Heating oven with conveyor and induction coils - has photoelectric cells to monitor appearance of black streaks |
| CN200993420Y (en) * | 2006-12-25 | 2007-12-19 | 佛山市顺德区美的家电实业有限公司 | Safety reliable electromagnetic oven |
| CN201393916Y (en) * | 2008-11-19 | 2010-02-03 | 庄梅兰 | Electronic infrared burnout-proof alarm induction cooker |
| CN202074583U (en) * | 2011-05-13 | 2011-12-14 | 佛山市顺德区美的电热电器制造有限公司 | Dry burning prevention and protection device for pan of induction cooker |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109838820A (en) * | 2017-11-29 | 2019-06-04 | 佛山市顺德区美的电热电器制造有限公司 | Dry combustion method detection method, dry combustion method detection device and electric cooking apparatus |
| CN109838820B (en) * | 2017-11-29 | 2020-06-05 | 佛山市顺德区美的电热电器制造有限公司 | Dry burning detection method, dry burning detection device and electric cooking appliance |
| CN109869756A (en) * | 2017-12-05 | 2019-06-11 | 佛山市顺德区美的电热电器制造有限公司 | Heating platform |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102221227B (en) | 2013-03-20 |
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