CN201774691U - Overheat protection device for induction cooker - Google Patents
Overheat protection device for induction cooker Download PDFInfo
- Publication number
- CN201774691U CN201774691U CN2010201099717U CN201020109971U CN201774691U CN 201774691 U CN201774691 U CN 201774691U CN 2010201099717 U CN2010201099717 U CN 2010201099717U CN 201020109971 U CN201020109971 U CN 201020109971U CN 201774691 U CN201774691 U CN 201774691U
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- temperature
- temperature sensor
- panel
- temperature switch
- electromagnetic stove
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Abstract
The utility model relates to the technical field of electromagnetic heating appliances, in particular to an overheat protection device of an electromagnetic stove. The device comprises a panel, a heating coil and a temperature sensor, wherein the temperature sensor is connected with a main circuit board of the induction cooker and outputs an electric signal to a CPU; the temperature switch is connected to an electronic protection circuit of the IGBT of the induction cooker. The utility model discloses a temperature sensor and temperature switch monitor heating temperature, when the temperature sensor inefficacy appears, still can be by temperature switch detection panel temperature, if the panel temperature surpasses the predetermined value, temperature switch automatic disconnection or output drive signal, thereby cut off the input circuit of the voltage comparator IC 2's of electronic protection circuit sample voltage end, make a voltage comparator IC2 output high level signal, restrain IGBT's drive signal, stop IGBT work from this, the electromagnetism stove heats up promptly, realize overheat protection.
Description
Technical field:
The utility model relates to the electromagnetic heating device technical field, refers in particular to a kind of overtemperature protection system of electromagnetic stove.
Background technology:
The overtemperature protection of existing electromagnetic stove, the general employing coated silicone grease at silica gel support, then temperature sensor is installed in the panel bottom surface, and temperature sensor generally adopts thermistor, and it is connected with the main circuit board of electromagnetic stove.When thermistor detected panel temperature above predetermined value, the CPU on the main circuit board in the electromagnetic stove can receive the signal of telecommunication, and then handled and cut off circuit, stopped the electromagnetic stove heating.But in the above-mentioned overtemperature protection structure,, make circuitry cuts untimely, may cause contingencies such as fire thus if thermistor lost efficacy or owing to reasons such as thermistor itself are defective, can cause the thermistor temperature-sensitive unusual.
The utility model content:
The purpose of this utility model is to provide a kind of overtemperature protection system with electromagnetic stove of two protections, and it prevents that effectively electromagnetic stove is overheated, uses safety and reliability.
The utility model purpose again provides a kind of simple in structurely, implement to be easy to the overtemperature protection system of electromagnetic stove.
For achieving the above object, the utility model adopts following technical scheme:
The overtemperature protection system of electromagnetic stove includes panel, heater coil, temperature sensor, and temperature sensor is connected with the main circuit board of electromagnetic stove, and the output signal of telecommunication is given CPU; This device also comprises a temperature switch, and this temperature switch is connected on the electronic protection circuit of IGBT of electromagnetic stove.
In the such scheme, described temperature switch and temperature sensor are self-contained within on the base, and base is between panel and heater coil, and temperature switch, temperature sensor all are close to the panel downside and are contacted.
In the such scheme, described temperature switch is installed separately on different bases with temperature sensor, and temperature switch is positioned at the panel downside, can be the face thick china or opens panel.
On the input circuit of the sampling voltage end of the voltage comparator ic 2 of described temperature switch series connection access electronic protection circuit.
Such scheme also can further be improved to: described temperature switch is to provide bias voltage to constitute by one or more groups thermistor and fixed resistance series connection dividing potential drop to triode, and transistor collector connects the sampling voltage end of the voltage comparator ic 2 of electronic protection circuit.Thermistor is self-contained within on the base with temperature sensor or is installed separately on different bases, and thermistor and temperature sensor all are close to the panel downside and are contacted.
The utility model adopts temperature sensor and temperature switch that heating-up temperature is monitored; when temperature sensor fails occurring; also can be by temperature switch detection faces plate temperature; surpass predetermined value as panel temperature; temperature switch automatic disconnection or output drive signal; thereby the input circuit of the sampling voltage end of the voltage comparator ic 2 of cut-out electronic protection circuit; the voltage that makes the sampling voltage end of voltage comparator ic 2 is zero; 2 output of voltage comparator ic, one high level signal; the drive signal that suppresses IGBT; stop IGBT work thus, promptly electromagnetic stove stops heating, realizes overtemperature protection.
Description of drawings:
Accompanying drawing 2 is its two example structure schematic diagram of the utility model;
Accompanying drawing 3 is the one embodiment line map of the utility model physical cabling.
Embodiment:
The overtemperature protection system of the electromagnetic stove that the utility model provides includes panel 1, heater coil 2, temperature sensor 3 and a temperature switch 4, and temperature sensor is connected with the main circuit board of electromagnetic stove, and the output signal of telecommunication is given CPU; 4 of temperature switches are connected on the electronic protection circuit 5 of IGBT of electromagnetic stove.When temperature sensor 3 inefficacies occurring; also can be by temperature switch 4 detection faces plate temperatures; surpass predetermined value as panel temperature; temperature switch 4 automatic disconnections or output drive signal; thereby the input circuit of the sampling voltage end of the voltage comparator ic 2 of cut-out electronic protection circuit 5; the voltage that makes the sampling voltage end of voltage comparator ic 2 is zero; 2 output of voltage comparator ic, one high level signal; the drive signal that suppresses IGBT; stop IGBT work thus; be that electromagnetic stove stops heating, realize overtemperature protection.
Understand for the juror can be had purpose, feature and the function of the utility model further, lift preferred embodiment now and cooperate graphic being described in detail as follows:
See also Fig. 1, Fig. 2 and shown in Figure 3; it is the structural representation of the preferred embodiment of the utility model; the utility model is the overtemperature protection system of relevant a kind of electromagnetic stove; include panel 1, heater coil 2, temperature sensor 3 and a temperature switch 4; temperature sensor 3 is self-contained within a base 6; base 6 is between panel 1 and heater coil 2; can make temperature sensor 3 be close to the downside of panel 1; temperature sensor 3 is connected with the main circuit board of electromagnetic stove; the output signal of telecommunication is given CPU, is received behind the signal of telecommunication and then is handled and cut off circuit by CPU.4 of temperature switches are connected on the electronic protection circuit 5 of IGBT of electromagnetic stove.As shown in Figure 3, on the input circuit of the sampling voltage end of the voltage comparator ic 2 of temperature switch 4 series connection access electronic protection circuits 5.
Shown in Figure 1, temperature switch 4 can be self-contained within on the base 6 with temperature sensor 3, and base 6 is between panel 1 and heater coil 2, and temperature switch 4, temperature sensor 3 all are close to panel 1 downside and are contacted.And for example shown in Figure 2, temperature switch 4 also can be installed separately on different bases with temperature sensor 3, and temperature switch 4 is positioned at panel 1 downside, can be face thick china 1 or opens panel 1.Temperature switch 4 is a normally closed switch, under home, and normally closed conducting, and crossing under the thermal environment its inner the two poles of the earth contact chip temperature distortion and disconnect when temperature switch 4, cut off circuit.
As shown in Figure 3; during enforcement; when the temperature that temperature switch 4 detects panel temperature 1 surpasses predetermined value; temperature switch 4 automatic disconnection of being heated; (thereby model is the voltage comparator ic 2 of cut-out electronic protection circuit 5: the input circuit of sampling voltage end LM339N); promptly cut off the voltage input of pin 4 ends of voltage comparator ic 2; the voltage that makes pin 4 ends of voltage comparator ic 2 is zero (being 2.5V during operate as normal); thus; pin 2 ends of voltage comparator ic 2 are then exported a high level signal and are given the triode Q602 (model is C9014) that connects IGBT, thereby suppress the drive signal of IGBT, stop IGBT work; be that electromagnetic stove stops heating, realize overtemperature protection.
Certainly, above-mentioned temperature switch 4 also can provide bias voltage to constitute to triode by one or more groups thermistor and fixed resistance series connection dividing potential drop, and transistor collector connects the sampling voltage end of the voltage comparator ic 2 of electronic protection circuit 5.Thermistor is self-contained within on the base 6 with temperature sensor 3 or is installed separately on different bases, and thermistor and temperature sensor 3 all are close to panel 1 downside and are contacted.When detecting heated object temperature and exceed standard, make the triode in the temperature switch 4 enter saturation condition by cut-off state, thereby allow pin 4 terminal voltages of the comparator IC2 that is connected this transistor collector be close to 0V, thereby make Q602 work reach the purpose that stops IGBT work.Being operated in traditional electromagnetic stove of relevant electronic protection circuit 5 exists; no longer do more detailed description at this; and the utility model mainly is a hardware of using already present electronic protection circuit 5, increases temperature switch 4, carries out overtemperature protection to cooperate temperature sensor 3.
The utility model is simple in structure, enforcement is easy, reaches two protection effects.
Claims (6)
1. the overtemperature protection system of electromagnetic stove includes panel (1), heater coil (2), temperature sensor (3), it is characterized in that: also comprise a temperature switch (4), this temperature switch (4) is connected on the electronic protection circuit (5) of the IGBT of electromagnetic stove.
2. the overtemperature protection system of electromagnetic stove according to claim 1; it is characterized in that: described temperature switch (4) is self-contained within on the base (6) with temperature sensor (3); base (6) is positioned between panel (1) and the heater coil (2), and temperature switch (4), temperature sensor (3) all are close to panel (1) downside and are contacted.
3. the overtemperature protection system of electromagnetic stove according to claim 1; it is characterized in that: described temperature switch (4) is installed separately on different bases with temperature sensor (3); temperature switch (4) is positioned at panel (1) downside, can be face thick china (1) or opens panel (1).
4. according to the overtemperature protection system of claim 2 or 3 described electromagnetic stoves, it is characterized in that: on the input circuit of the sampling voltage end of the voltage comparator ic 2 of temperature switch (4) series connection access electronic protection circuit (5).
5. the overtemperature protection system of electromagnetic stove according to claim 1; it is characterized in that: described temperature switch (4) is to provide bias voltage to constitute by one or more groups thermistor and fixed resistance series connection dividing potential drop to triode, and transistor collector connects the sampling voltage end of the voltage comparator ic 2 of electronic protection circuit (5).
6. the overtemperature protection system of electromagnetic stove according to claim 5; it is characterized in that: thermistor and temperature sensor (3) are self-contained within a base (6) and go up or be installed separately on different bases, and thermistor and temperature sensor (3) all are close to panel (1) downside and are contacted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201099717U CN201774691U (en) | 2010-01-30 | 2010-01-30 | Overheat protection device for induction cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201099717U CN201774691U (en) | 2010-01-30 | 2010-01-30 | Overheat protection device for induction cooker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201774691U true CN201774691U (en) | 2011-03-23 |
Family
ID=43754531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201099717U Expired - Fee Related CN201774691U (en) | 2010-01-30 | 2010-01-30 | Overheat protection device for induction cooker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201774691U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103781213A (en) * | 2014-02-17 | 2014-05-07 | 高雄 | Handheld electromagnetic heater |
| CN108291724A (en) * | 2015-08-13 | 2018-07-17 | 皮斯沃尔德有限公司 | The device of the support cooking container of stove is incuded for intelligent low-laying type |
| WO2022236556A1 (en) * | 2021-05-10 | 2022-11-17 | 舍弗勒技术股份两合公司 | Temperature monitoring device and method |
-
2010
- 2010-01-30 CN CN2010201099717U patent/CN201774691U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103781213A (en) * | 2014-02-17 | 2014-05-07 | 高雄 | Handheld electromagnetic heater |
| CN108291724A (en) * | 2015-08-13 | 2018-07-17 | 皮斯沃尔德有限公司 | The device of the support cooking container of stove is incuded for intelligent low-laying type |
| US10932330B2 (en) | 2015-08-13 | 2021-02-23 | Peaceworld Co., Ltd | Device to support cooking container for smart under range |
| WO2022236556A1 (en) * | 2021-05-10 | 2022-11-17 | 舍弗勒技术股份两合公司 | Temperature monitoring device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110323 Termination date: 20140130 |