CN2036293U - High sensitive over-heating protecting and temp. controller - Google Patents
High sensitive over-heating protecting and temp. controller Download PDFInfo
- Publication number
- CN2036293U CN2036293U CN 88202153 CN88202153U CN2036293U CN 2036293 U CN2036293 U CN 2036293U CN 88202153 CN88202153 CN 88202153 CN 88202153 U CN88202153 U CN 88202153U CN 2036293 U CN2036293 U CN 2036293U
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- temperature
- regulating device
- thermal
- circuit
- ptc
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Abstract
The utility model provides an electrothermic electric appliance, particularly a high sensitive over-heating protecting and temp. controller of an electrothermic electric appliance adopting an electrothermic film as a heating element. The utility model adopts a temperature sensor with a PTC thermosensitive element as an over-heating protector and adopts a controlled silicon voltage regulating circuit to regulate and control the input power of the electrothermic electric appliance. The utility model is sensitive to the over-heating protection of a heating element of a thermosensitive film, and has the advantages of high reliability and long service life of a thermosensitive film, so the electrothermic electric appliance adopting the thermosensitive film as the heating element can reach the practical requirement. The utility model can realize the flexible control of the multi-grade output power and improve the use performance of the electrothermic electric appliance.
Description
The utility model relates to electric heating appliance, particularly with Electric radiant Heating Film as the overheating protection of the electric heating appliance of heater and the improvement of temperature regulating device.
Bimetallic strip at present commonly used or temperature control magnet steel carry out temperature control as temperature sensor to electric heating appliance such as electric-heating cooking utensil, this class thermostat reliable in action but sensitive inadequately, only be applicable to the electric heating appliance that adopts the general heating element to make heater, this class thermostat has only heating usually and is incubated two retainings on circuit design simultaneously, and the range of application of electric heating appliance is restricted.A kind of novel electric heating body---Electric radiant Heating Film has appearred in recent years, (seeing CN86100500A) it by the inorganic binder mixing graphite powder by certain formulated form slurry, with serigraphy or spraying method by the design shape seal, be sprayed on that sintering forms membranaceous electric heating body on the insulation material.This Electric radiant Heating Film as electric heating appliance as the electric heating body of electric-heating cooking utensil, electric heater, electric heat insulating pot, electric water boiler etc. than the electrical heating element of type (as heating wire etc.) have series of advantages; but because of Electric radiant Heating Film self programming rate fast; easy overtemperature and burning out; need safety and reliability that sensitive overtemperature protection system can guarantee that just electric heating appliance uses, existing bimetallic strip or temperature control magnet steel temperature sensor are difficult to adapt to its requirement.
Task of the present utility model provides a kind of improved electric heating appliance temperature regulating device with high-sensitive overheating protection and many retaining temperature control scopes.This device is especially to being that the electric heating appliance of heater can provide reliable and effective temperature control and overheating protection with the Electric radiant Heating Film.
Task of the present utility model is achieved through the following technical solutions: adopt the PTC posistor as temperature sensor in temperature-adjusting circuit, utilize the temperature resistance characteristic of specific PTC thermal sensing element, play overheating protection in circuit.This temperature regulating device adopts the silicon-controlled voltage regulation circuit to adjust the output power of electric heating appliance, above-mentioned PTC thermal sensing element is serially connected in the silicon controlled trigger circuit as crossing Thermal temperature controller, the output power of electric heating appliance also can be carried out manually many retaining adjustings by the power governor that is serially connected in this thyristor gating circuit, and this power governor is one and has the variohm that resistance divides position switch.
Above-mentioned temperature sensor is made up of as the thermal conductive metal plate of temperature sampling thermal-arrest plate with being close on the thermal sensing element the PTC thermal sensing element, it is the bronze of 0.1～2mm that this thermal conductive metal plate can adopt thickness, the sheet metal that red copper or other heat conduction are good also uses the mode of pressing or boning to be contained on the PTC thermal sensing element, with the another side of this sheet metal and PTC thermal sensing element two electrodes as temperature sensor, can draw lead from these two electrodes receives the temperature-adjusting circuit as crossing Thermal temperature controller, the temperature of this temperature sensor sampling thermal-arrest plate sensor will be close to heater element (as the Electric radiant Heating Film) surface of electric heating appliance when practical, so should there be a thin mica sheet to insulate between temperature sampling thermal-arrest plate and heater element.
Usually can select to have the PTC thermal sensing element of suitable temperature resistance characteristic according to the heater element that electric heating appliance adopted to the specific requirement of overheating protection; the temperature resistance characteristic of PTC thermal sensing element; pairing temperature can be chosen in the arbitrary temperature between 100～300 ℃ when its resistance sharply increased; for the Electric radiant Heating Film heater element, this corresponding temperature optimal selection is the arbitrary temperature between 120～150 ℃.Promptly play superheat protecting function this temperature range planted agent.
The temperature-adjusting circuit of this device can adopt the bidirectional triode thyristor AC voltage adjusting circuit.
For electric-heating cooking utensil, needs according to culinary art, can in main circuit power supply, be connected in series a unidirectional hand-reset electrothermal relay, the temperature detector of this unidirectional hand-reset electrothermal relay can make it be close to the surface of heater element, also can be close to the temperature sampling thermal-arrest plate surface of Thermal temperature controller, also can be close to the bottom surface of cooking container, when reaching cooking temp, the power supply of main heater element is cut off in this electrothermal relay action.
The utility model adopts the PTC thermal sensing element to carry out overheating protection; this thermal sensing element is owing to the reaction of impedance variation when reaching overtemperature is sensitive especially; thereby to heater element particularly Electric radiant Heating Film reliable and effective overheating protection can be provided; the Electric radiant Heating Film mission life was reached more than 6000 hours; reach practical requirement; thereby give full play to the electric heating appliance good energy-conserving effect of making heater element with Electric radiant Heating Film; the advantage that cost is low; simultaneously owing to adopt the silicon-controlled voltage regulation circuit to carry out power control; make device realize the flexible temperature control of many retaining output powers; electric heating appliance can adapt to user's multiple needs, improves the usability of electric heating appliance.
With reference to the accompanying drawings an embodiment who designs by technical solutions of the utility model is illustrated below:
Fig. 1 be have this overheating protection and temperature regulating device with the structure diagram of Electric radiant Heating Film as the electric cooker of heater element;
Fig. 2 is the circuit diagram of this overheating protection and temperature regulating device;
Among the figure, (1) is pot cover, and (2) are the pot body, and (3) are base, and (4) are electrothermal film heater, and this overheating protection and temperature regulating device are installed among the base, wherein as crossing Thermal temperature controller (R
1) temperature sensor be that bronze temperature sampling heat collecting sheet (6) and the PTC thermal sensing element (7) of 0.33mm formed by thickness, between temperature sampling heat collecting sheet (6) and Electric radiant Heating Film heater element, there is thin mica sheet (5) to play insulating effect, this temperature sensor is by spring (a 8) palm and be close to the heater element surface, the power adjustment of its heater adopts bidirectional triode thyristor to carry out AC voltage adjusting, (11) be the circuit connection box, in the regulating circuit with a bidirectional triode thyristor 3CTS, the trigger circuit of 3CTS adopt the bilateral diode trigger circuit, comprise bilateral diode 2CTS, resistance R
3, capacitor C, cross Thermal temperature controller R
1With the variohm R that divides position switch as the strip resistance of manual power governor (10)
2Be serially connected in the trigger circuit, this variohm is installed on the panel of base by lead-in wire, so that manually control.The electrothermal film heater of this electric cooker comprises main heating element R and auxiliary heater R ' in parallel with it, in the current supply circuit of main heating element R, be serially connected with a unidirectional hand-reset electrothermal relay T(9), the temperature detector of this unidirectional hand-reset electrothermal relay is adjacent to surface at temperature sampling thermal-arrest plate (6) by a palm spring.During the work of this device, R1, R2, R3 and C form the RC loop, make 2CTS produce trigger pulse, control bidirectional triode thyristor 3CTS is in the logical conducting down of certain lead angle, make heater (Electric radiant Heating Film) R and R ' acquisition heating power, change R2(gearshift) resistance value with changing the phase place of capacitor C, makes the trigger pulse phase shift, thereby change the conduction angle of 3CTS, change to supply with the power of heater R and R ', when reaching cooking temp, the unidirectional hand-reset heat device T that continues will move, cut off the power supply of main calandria, electric cooker enters insulation, when electric food warmer work is undesired when making heater reach overtemperature, crosses Thermal temperature controller R
1By temperature sensing the resistance value of PTC thermal sensing element is sharply risen, bidirectional triode thyristor 3CTS is turn-offed fully, circuit stops the heater power supply, thereby heater (Electric radiant Heating Film) is protected.
Claims (8)
1, a kind of temperature regulating device of electric heating appliance; particularly with the temperature regulating device of Electric radiant Heating Film as the electric heating appliance of heater element; it is characterized in that in temperature-adjusting circuit, having a PTC posistor that plays heat protective effect as temperature sensor; and adopting the adjustment of silicon-controlled voltage regulation circuit to control the output power of electric heating appliance, the PTC thermosensitive resistor with positive temp coefficient is connected in the silicon controlled trigger circuit as crossing Thermal temperature controller.
2, by the described temperature regulating device of claim 1, it is characterized in that said temperature sensor comprises the PTC thermal sensing element and is close to the thermal conductive metal plate of using as temperature sampling thermal-arrest plate of this thermal sensing element, this temperature sampling thermal-arrest plate by a thin mica insulation sheet and electric heating appliance heater element---Electric radiant Heating Film is close to.
3, by the described temperature regulating device of claim 1, it is characterized in that the temperature resistance characteristic of said PTC thermal sensing element, pairing temperature was chosen in the arbitrary temperature between 100～330 ℃ when its resistance value sharply increased.
4, by the described temperature regulating device of claim 1, it is characterized in that being used for the temperature resistance characteristic of the PTC thermal sensing element of Electric radiant Heating Film overheating protection, arbitrary temperature that pairing temperature was chosen between 120～150 ℃ when its resistance value sharply increased is advisable.
5, by claim 1 or 2 described temperature regulating devices, it is characterized in that the temperature sampling thermal-arrest plate employing thickness of said temperature sensor is bronze or the copper sheet of 0.1～2mm, be contained on the PTC thermal sensing element in the mode of pressing or bond.
6, by the described temperature regulating device of claim 1, it is characterized in that said silicon-controlled voltage regulation circuit is the bidirectional triode thyristor AC voltage adjusting circuit.
7,, it is characterized in that being serially connected with a unidirectional hand-reset electrothermal relay in the main circuit of regulating circuit by the described temperature regulating device of claim 1.
8, by the described temperature regulating device of claim 1, it is characterized in that strip resistance of serial connection is divided position switch in the thyristor gating circuit variohm as power governor, this power governor is installed on the panel of electric heating appliance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88202153 CN2036293U (en) | 1988-03-21 | 1988-03-21 | High sensitive over-heating protecting and temp. controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88202153 CN2036293U (en) | 1988-03-21 | 1988-03-21 | High sensitive over-heating protecting and temp. controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2036293U true CN2036293U (en) | 1989-04-19 |
Family
ID=4837202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88202153 Expired - Lifetime CN2036293U (en) | 1988-03-21 | 1988-03-21 | High sensitive over-heating protecting and temp. controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2036293U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101212847B (en) * | 2006-12-31 | 2011-03-30 | 海尔集团公司 | Heating control circuit and heating electrical appliance |
| CN103779855A (en) * | 2012-10-26 | 2014-05-07 | 孙巍巍 | Novel surge protector |
| CN104062992A (en) * | 2014-06-09 | 2014-09-24 | 河海大学 | Electric heating device |
| CN105346328A (en) * | 2015-09-29 | 2016-02-24 | 吴肖颜 | Drawing board with heating function |
-
1988
- 1988-03-21 CN CN 88202153 patent/CN2036293U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101212847B (en) * | 2006-12-31 | 2011-03-30 | 海尔集团公司 | Heating control circuit and heating electrical appliance |
| CN103779855A (en) * | 2012-10-26 | 2014-05-07 | 孙巍巍 | Novel surge protector |
| CN104062992A (en) * | 2014-06-09 | 2014-09-24 | 河海大学 | Electric heating device |
| CN105346328A (en) * | 2015-09-29 | 2016-02-24 | 吴肖颜 | Drawing board with heating function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C35 | Partial or whole invalidation of patent or utility model | ||
| IW01 | Full invalidation of patent right |
Decision date of declaring invalidation: 19910308 Decision number of declaring invalidation: 120 |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |