CN2563804Y - Overheat protector for electric appliance - Google Patents
Overheat protector for electric appliance Download PDFInfo
- Publication number
- CN2563804Y CN2563804Y CN 01226198 CN01226198U CN2563804Y CN 2563804 Y CN2563804 Y CN 2563804Y CN 01226198 CN01226198 CN 01226198 CN 01226198 U CN01226198 U CN 01226198U CN 2563804 Y CN2563804 Y CN 2563804Y
- Authority
- CN
- China
- Prior art keywords
- electric heat
- glass plate
- electrical appliance
- temperature
- electric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Control Of Resistance Heating (AREA)
Abstract
The utility model discloses an overheating protection device matched with electric heat glass plate and electric heating carpet for use, the utility model is characterized in that: the heating temperature of the electric heat glass plate and electric heat carpet and similar appliances is monitored by heat relay or temperature sensor, according to the set temperature, the connection and disconnection of power supply of the appliances is controlled by controller so as to avoid risk and accidents due to overheated electric heat glass plate and electric heat carpet, no matter what reason that the temperature of electric heat glass plate and electric heat carpet is raised, power supply can be cut off in time, thereby preventing burn-out and accidents, as matched with the electric heat glass plate and electric heat carpet for use, the utility model has the advantages of sensitive and reliable control, simple structure and low cost.
Description
One, technical field:
The utility model relates to a kind of overtemperature protection system, particularly the overtemperature protection system that is used with electrical appliances such as electric ehated glass plate, electric blankets.
Two, background technology:
Electrical appliances such as electric ehated glass plate, electric blanket in use often owing to forget that powered-down and electrical appliance coil open circuit, cause that the too high electrical appliance that makes of temperature is overheated and burn, and cause the accident and fire.At present, electrical appliances such as the electric ehated glass plate of market sale, electric blanket are the not high products for civilian use of price, do not have a kind of suitable, cheap overtemperature protection system.
Three, summary of the invention:
Task of the present utility model provides a kind of overtemperature protection system that is used with electrical appliances such as electric ehated glass plate, electric blankets; it can control the temperature of electrical appliance; as long as the electrical appliance temperature surpasses design temperature, can cut off the electricity supply rapidly, guaranteeing that electrical appliance is not overheated burns.
For achieving the above object, technical solution of the present utility model is: the electrical appliance overtemperature protection system comprises temperature sensor and controlling parts, temperature sensor) be attached in the electrical appliance or the limit on, and be connected with controlling parts.
Electrical appliance overtemperature protection system, electrical appliance are provided with a thermal relay.
Described overtemperature protection system, temperature sensor are a thermistor R
0, controlling parts is by integrated circuit A, triode T
1, relay J, J
1, J
2, and resistance R, capacitor C
1, diode D forms, integrated circuit A with by R
0, R
1, R
2, R
3The bridge circuit of forming passes through R after connecting
4Again with triode T
1Connect.
Because the overtemperature protection system that technical solutions of the utility model have adopted temperature monitoring element and control element to form is controlled the device of electrical appliances such as electric ehated glass plate, electric blanket, makes it have following advantage:
1, this device is too high for the electrical appliance temperature that any reason causes, and defencive function is all arranged, and makes electrical appliances such as electric ehated glass plate, electric blanket obtain reliable overtemperature protection.
2, this device is when control electrical appliance temperature, and its control precision is higher, and is highly sensitive.
3, this apparatus structure is simple, and is easy to use, cheap.
Such scheme can be used for the overtemperature protection of all electrical appliances such as electric ehated glass plate, electric blanket.
Four, description of drawings:
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.
Fig. 1 is the structural representation of the utility model electrical appliance overtemperature protection system.
Fig. 2 is one of fundamental diagram of the utility model electrical appliance overtemperature protection system.
Fig. 3 be the utility model electrical appliance overtemperature protection system fundamental diagram two.
Five, embodiment:
Examples of implementation:
As shown in Figure 1, the electrical appliance overtemperature protection system comprises temperature sensor 1 and controlling parts 2, temperature sensor 1 be posted in the electrical appliance or the limit on, and be connected, as Fig. 2 with controlling parts 2.Temperature sensor 1 is a thermistor R
0, controlling parts 2 is by integrated circuit A, triode T
1, relay J, J
1, J
2, and resistance R, capacitor C
1, diode D forms, integrated circuit A with by R
0, R
1, R
2, R
3The bridge circuit of forming passes through R after connecting
4Again with triode T
1Connect.Voltage comparator of integrated circuit A, model commonly used has LM339, LM319 etc., its function be exactly relatively the end,
The voltage of two inputs, when the terminal voltage greater than
During end, be output as high level, the triode of back is just open-minded; When
When terminal voltage is held greater than , be output as low level, the triode of back just ends.
In the circuit diagram as shown in Figure 2, DC power supply is 12V, and when electrical appliance temperature such as electric ehated glass plate, electric blanket were in room temperature, integrated circuit A just was output as triode T by end input positive voltage
1Saturation conduction is as long as click button SB this moment
1, relay J line Bao Dedian inhales platform, normal battle of the J of relay
1Even closed self-locking is SB
1That unclamps relay still can keep work, thus relay another to normally opened contact J
2Closure, heating wire energising heating.
When being heated to set point, if thermistor R
0Be load, i.e. temperature rising R
0Resistance reduces, integrated circuit
Terminal potential rises, and when surpassing the terminal potential, chip output is output as negative value, transistor T
1End, the tripping of not working of relay line bag dead electricity, two normally opened contacts disconnect, and heater stops heating.
Normal battle J
1Disconnection be to guarantee that integrated package terminal potential is higher than after electrical appliance temperature such as electric hot plate reduce
During end, T
1Base stage when being positive potential, relay J still not adhesive must be pressed SB
1After, the action of could switching on once more.Protected the safety of electrical appliances such as electric ehated glass plate, electric blanket.
Overtemperature protection system is used for electrical appliances such as electric ehated glass plate, electric blanket; be to be installed on monitoring element in the electrical appliance or on the limit, with the temperature of monitoring electrical appliance, when the electrical appliance temperature is too high; control element is controlled electrical appliance by the circuit that combines and is disconnected, and electrical appliance is protected.
Outside the embodiment:
As shown in Figure 3.
When the temperature of thermal relay 3 sensitive surface surpassed set point, inner contact can automatic disconnection, at this moment Electrothermic wire R ' just outage can not work, when the temperature of sensing when thermal relay 3 was lower than set point, inner contact can be connected again automatically.Measure a plurality of temperature spots as need, as long as the thermal relay 3 of the respective numbers of in circuit, connecting.
Claims (3)
1, a kind of electrical appliance overtemperature protection system is characterized in that: it comprises that temperature sensor (1) and controlling parts (2), temperature sensor (1) are attached in the electrical appliance or on the limit, and is connected with controlling parts (2).
2, a kind of electrical appliance overtemperature protection system is characterized in that: electrical appliance is provided with a thermal relay (3).
3, according to the described overtemperature protection system of claim 1, it is characterized in that: temperature sensor is a thermistor R
0, controlling parts (2) is by integrated circuit A, triode T
1, relay J, J
1, J
2, and resistance R, capacitor C
1, diode D forms, integrated circuit A with by R
0, R
1, R
2, R
3The bridge circuit of forming passes through R after connecting
4Again with triode T
1Connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01226198 CN2563804Y (en) | 2001-06-06 | 2001-06-06 | Overheat protector for electric appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01226198 CN2563804Y (en) | 2001-06-06 | 2001-06-06 | Overheat protector for electric appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2563804Y true CN2563804Y (en) | 2003-07-30 |
Family
ID=33641914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01226198 Expired - Fee Related CN2563804Y (en) | 2001-06-06 | 2001-06-06 | Overheat protector for electric appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2563804Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102593790A (en) * | 2011-01-05 | 2012-07-18 | 海洋王照明科技股份有限公司 | Lighting fixture overheating protection circuit and lighting fixture thereof |
| CN103915819A (en) * | 2013-01-08 | 2014-07-09 | 霍尼韦尔国际公司 | Thermal protection method and system to maximize availability of electric drive system |
| CN108404423A (en) * | 2018-04-18 | 2018-08-17 | 深圳市沃特沃德股份有限公司 | Down toy temprature control method and primary processor |
-
2001
- 2001-06-06 CN CN 01226198 patent/CN2563804Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102593790A (en) * | 2011-01-05 | 2012-07-18 | 海洋王照明科技股份有限公司 | Lighting fixture overheating protection circuit and lighting fixture thereof |
| CN102593790B (en) * | 2011-01-05 | 2015-01-07 | 海洋王照明科技股份有限公司 | Lighting fixture overheating protection circuit and lighting fixture thereof |
| CN103915819A (en) * | 2013-01-08 | 2014-07-09 | 霍尼韦尔国际公司 | Thermal protection method and system to maximize availability of electric drive system |
| CN103915819B (en) * | 2013-01-08 | 2018-07-03 | 霍尼韦尔国际公司 | For maximizing the heat protection method of the availability of power drive system and system |
| CN108404423A (en) * | 2018-04-18 | 2018-08-17 | 深圳市沃特沃德股份有限公司 | Down toy temprature control method and primary processor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |