CN103529875B - Be applicable to the superheated control circuit of household electrical appliance - Google Patents
Be applicable to the superheated control circuit of household electrical appliance Download PDFInfo
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- CN103529875B CN103529875B CN201310521193.0A CN201310521193A CN103529875B CN 103529875 B CN103529875 B CN 103529875B CN 201310521193 A CN201310521193 A CN 201310521193A CN 103529875 B CN103529875 B CN 103529875B
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Abstract
The invention discloses a kind of superheated control circuit being applicable to household electrical appliance, it comprises controllable silicon VS, resistance R1, resistance R2, resistance R3, resistance R4, diode D and electric capacity C, and the anode of described controllable silicon VS and negative electrode are connected on the first port and the second port; Described resistance R2 and resistance R3 is in series, and is connected with resistance R1 between the not common end of resistance R2 and the first port, and the not common end of resistance R3 connects on the second port; The cathode of described diode D is connected on the not common end of resistance R2, is connected with resistance R4 between the anode of diode D and the second port; Described diode D is parallel with electric capacity C; The controlled stage of described controllable silicon VS, the common port of resistance R2 and resistance R3, the anode of diode D are all connected on voltage comparator; Described resistance R2 is thermistor.Its advantage is: can carry out detection control to the superheated situation of household electrical appliance, avoids the too high people's of the making discomfort of temperature or causes the security of the lives and property to lose.
Description
Technical field
The present invention relates to integrated circuit, relate to a kind of superheated control circuit being applicable to household electrical appliance in particular.
Background technology
Increasing and popularizing along with household electrical appliance, the heating electrical appliances such as electric oven, water heater, electric blanket get more and more.In the use of the heater element of family expenses, its security is more and more important.Water heater in use, owing to forgetting the time, makes water heater be in heated condition until dryouied by water always, thus initiation fire.In use, the fault due to electric blanket itself causes heat excessive to electric blanket, damages the person; Or because electric blanket is in heated condition always, make the temperature of quilt high, cause human body uncomfortable.These phenomenons are in the life of reality, and it often occurs.
Summary of the invention
The present invention is directed to above-mentioned situation, a kind of superheated control circuit being applicable to household electrical appliance is provided, it is connected in the circuit of household electrical appliance, can carry out detection control to the superheated situation of household electrical appliance, avoids the too high people's of the making discomfort of temperature or causes the security of the lives and property to lose.
For solving above-mentioned technical matters, the present invention by the following technical solutions:
Be applicable to the superheated control circuit of household electrical appliance, it comprises controllable silicon VS, resistance R1, resistance R2, resistance R3, resistance R4, diode D and electric capacity C, and the anode of described controllable silicon VS and negative electrode are connected on the first port and the second port; Described resistance R2 and resistance R3 is in series, and is connected with resistance R1 between the not common end of resistance R2 and the first port, and the not common end of resistance R3 connects on the second port; The cathode of described diode D is connected on the not common end of resistance R2, is connected with resistance R4 between the anode of diode D and the second port; Described diode D is parallel with electric capacity C; The controlled stage of described controllable silicon VS, the common port of resistance R2 and resistance R3, the anode of diode D are all connected on voltage comparator; Described resistance R2 is thermistor.
Further technical scheme is:
As preferably, described resistance R2 is 600K Ω.
Further, described resistance R2 and the resistance value ratio of resistance R3 are greater than 3.
First port connects fuse, this circuit is connected in circuit, when the temperature of heater rises, the resistance of resistance R2 diminishes, and makes the voltage rise of the common port of resistance R2 and resistance R3, when temperature is increased beyond certain reference voltage, the high level of the output of voltage comparator makes controllable silicon VS conducting, instantaneous short circuit makes the insurance be connected on the first port be blow, thus makes the temperature of household electrical appliance unlikely too high, avoids damaging people.Diode D and electric capacity C coordinates resistance R1 to provide step-down, provides power supply to voltage comparator and other circuit.Its dividing potential drop effect of resistance R4, avoids that voltage is excessive to be damaged diode D.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention is connected in the circuit of household electrical appliance; utilize the characteristic of thermistor to detect the temperature that temperature carries out household electrical appliance heating, when heating temperatures to a certain extent time, circuit is disconnected; stop heating, avoid temperature too high to making human body discomfort or protecting lives and properties.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is circuit diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.Embodiments of the present invention include but not limited to the following example.
[embodiment]
The superheated control circuit being applicable to household electrical appliance as shown in Figure 1, it comprises controllable silicon VS, resistance R1, resistance R2, resistance R3, resistance R4, diode D and electric capacity C, and the anode of described controllable silicon VS and negative electrode are connected on the first port and the second port; Described resistance R2 and resistance R3 is in series, and is connected with resistance R1 between the not common end of resistance R2 and the first port, and the not common end of resistance R3 connects on the second port; The cathode of described diode D is connected on the not common end of resistance R2, is connected with resistance R4 between the anode of diode D and the second port; Described diode D is parallel with electric capacity C; The controlled stage of described controllable silicon VS, the common port of resistance R2 and resistance R3, the anode of diode D are all connected on voltage comparator; Described resistance R2 is thermistor.
Thermistor is with the exponentially relation reduction of temperature rising resistance, thermistor phenomenon and the material with negative temperature coefficient.The heater that resistance R2 is close to electrical equipment is installed, such as the heating wire of electric blanket.First port connects fuse, this circuit is connected in circuit, when the temperature of heater rises, the resistance of resistance R2 diminishes, and makes the voltage rise of the common port of resistance R2 and resistance R3, when temperature is increased beyond certain reference voltage, the high level of the output of voltage comparator makes controllable silicon VS conducting, instantaneous short circuit makes the insurance be connected on the first port be blow, thus makes the temperature of household electrical appliance unlikely too high, avoids damaging people.Diode D and electric capacity C coordinates resistance R1 to provide step-down, provides power supply to voltage comparator and other circuit.Its dividing potential drop effect of resistance R4, avoids that voltage is excessive to be damaged diode D.
In order to make the monitoring accuracy of this circuit increase, described resistance R2 is 600K Ω.The variation range of thermistor is large, can realize larger accuracy of detection.
Described resistance R2 and the resistance value ratio of resistance R3 are greater than 3.Resistance R3 plays dividing potential drop effect, in order to improve the accuracy of detection to temperature, the resistance of resistance R3 is less than the resistance of resistance R2, the common port of resistance R2 and resistance R3 could provide precise voltage to voltage comparator, the resistance of resistance R2 reduces along with the rising resistance of temperature, ensure that resistance R2 is greater than the resistance of resistance R3 all the time, the resistance value ratio of resistance R2 and resistance R3 is greater than 3.
Be embodiments of the invention as mentioned above.The present invention is not limited to above-mentioned embodiment, and anyone should learn the structure change made under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, all falls within protection scope of the present invention.
Claims (3)
1. be applicable to the superheated control circuit of household electrical appliance, it is characterized in that: it comprises controllable silicon VS, resistance R1, resistance R2, resistance R3, resistance R4, diode D and electric capacity C, the anode of described controllable silicon VS and negative electrode are connected on the first port and the second port; Described resistance R2 and resistance R3 is in series, and is connected with resistance R1 between the not common end of resistance R2 and the first port, and the not common end of resistance R3 connects on the second port; The cathode of described diode D is connected on the not common end of resistance R2, is connected with resistance R4 between the anode of diode D and the second port; Described diode D is parallel with electric capacity C; The controlled stage of described controllable silicon VS, the common port of resistance R2 and resistance R3, the anode of diode D are all connected on voltage comparator; Described resistance R2 is thermistor, and the first described port is connected on fuse.
2. the superheated control circuit being applicable to household electrical appliance according to claim 1, is characterized in that: described resistance R2 is 600K Ω.
3. the superheated control circuit being applicable to household electrical appliance according to claim 1 and 2, is characterized in that: described resistance R2 and the resistance value ratio of resistance R3 are greater than 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310521193.0A CN103529875B (en) | 2013-10-30 | 2013-10-30 | Be applicable to the superheated control circuit of household electrical appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310521193.0A CN103529875B (en) | 2013-10-30 | 2013-10-30 | Be applicable to the superheated control circuit of household electrical appliance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103529875A CN103529875A (en) | 2014-01-22 |
| CN103529875B true CN103529875B (en) | 2016-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310521193.0A Expired - Fee Related CN103529875B (en) | 2013-10-30 | 2013-10-30 | Be applicable to the superheated control circuit of household electrical appliance |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2130271Y (en) * | 1992-07-31 | 1993-04-21 | 许顺峰 | Temp.-controlled protector |
| CN2927147Y (en) * | 2006-07-18 | 2007-07-25 | 百利通电子(上海)有限公司 | Diode temperature compensator |
| CN200965641Y (en) * | 2006-10-08 | 2007-10-24 | 薛文伟 | AC temperature control circuit |
| CN201039469Y (en) * | 2007-03-28 | 2008-03-19 | 张隆皇 | A constant temperature heating device and its heater |
| CN202111459U (en) * | 2011-07-05 | 2012-01-11 | 曹飞 | Safety protection device of electric blanket |
| CN203535513U (en) * | 2013-10-30 | 2014-04-09 | 成都市宏山科技有限公司 | Household appliance overheating control circuit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100905417B1 (en) * | 2007-10-17 | 2009-07-02 | 신봉섭 | An equipment for preventing overheating in malfuncting of switching diode for controlling heater power in heating equipment |
| KR100918454B1 (en) * | 2009-04-28 | 2009-09-24 | 윤정수 | Protection circuit for regulator temperature of heating coil |
-
2013
- 2013-10-30 CN CN201310521193.0A patent/CN103529875B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2130271Y (en) * | 1992-07-31 | 1993-04-21 | 许顺峰 | Temp.-controlled protector |
| CN2927147Y (en) * | 2006-07-18 | 2007-07-25 | 百利通电子(上海)有限公司 | Diode temperature compensator |
| CN200965641Y (en) * | 2006-10-08 | 2007-10-24 | 薛文伟 | AC temperature control circuit |
| CN201039469Y (en) * | 2007-03-28 | 2008-03-19 | 张隆皇 | A constant temperature heating device and its heater |
| CN202111459U (en) * | 2011-07-05 | 2012-01-11 | 曹飞 | Safety protection device of electric blanket |
| CN203535513U (en) * | 2013-10-30 | 2014-04-09 | 成都市宏山科技有限公司 | Household appliance overheating control circuit |
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| Publication number | Publication date |
|---|---|
| CN103529875A (en) | 2014-01-22 |
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Effective date of registration: 20180626 Address after: 610000 Rong Ou, 144 Qingbaijiang Road, Chengdu, Sichuan. Patentee after: Chengdu Zhi Rong Chuang Intellectual Property Operation Co., Ltd. Address before: 610000 20 Yongfeng Road, high tech Zone, Chengdu, Sichuan, 2 1. Patentee before: Chengdu Hongshan Technology Co., Ltd. |
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Effective date of registration: 20181130 Address after: 644000 No. 108 Xiazheng Street, Nanxi District, Yibin City, Sichuan Province Patentee after: Lei Yingxiong Address before: 610000 Rong Ou, 144 Qingbaijiang Road, Chengdu, Sichuan. Patentee before: Chengdu Zhi Rong Chuang Intellectual Property Operation Co., Ltd. |
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Granted publication date: 20160203 Termination date: 20191030 |
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| CF01 | Termination of patent right due to non-payment of annual fee |