CN1114057A - Temp. control circuit - Google Patents
Temp. control circuit Download PDFInfo
- Publication number
- CN1114057A CN1114057A CN 94106601 CN94106601A CN1114057A CN 1114057 A CN1114057 A CN 1114057A CN 94106601 CN94106601 CN 94106601 CN 94106601 A CN94106601 A CN 94106601A CN 1114057 A CN1114057 A CN 1114057A
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- Prior art keywords
- relay
- normally open
- bimetal strip
- temperature
- heating
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Abstract
The thermal control circuit is composed as follows: one bimetallic sheet thermocontroller, electromagnetic coil of relay and its one group of normally open contacts are connected in series, then connected to power source to form circuit. The push button with the auto-return-back function of normally open contacts is connected in parallel to the said normally open contacts of relay, the electric heate is connected through another group contacts of relay to power source, one end of another bimetallic sheet thermo controller is connected to power source, the other end is connected to the connecting wire between electric heater and the latter normally open contacts of relay. Said invention features simple structure and the center of electrothermal plate having no need to drill hole.
Description
The present invention relates to a kind of temperature-control circuit.
In the prior art, magnetic steel temperature limiter is widely used in the auto-electric cooker using pottery, and because of reasons such as technologies, temperature controlling range is generally at 101 degree Celsius--about-120 degree Celsius.Use the auto-electric cooker using pottery of magnetic steel temperature limiter, the electric hot plate center must perforate.Sensor is the electronic temperature control device of thermistor, thermopair, PN junction or integrated temperature sensor, also be widely used in the auto-electric cooker using pottery, it has the identical temperature control capacity of magnetic steel temperature limiter, but different places is arranged with magnetic steel temperature limiter, after starting to control, use in the circuit of magnetic steel temperature limiter not have electric current, still have electric current in the electrothermal tube circuit of above-mentioned electronic temperature control device and use, though i.e.: no current in the electrothermal tube, and still there is electric current in the electronic temperature control device.
The objective of the invention is: what provide that a kind of electric hot plate center unlike the prior art do not need perforate has the magnetic steel temperature limiter identical function and the different temperature-control circuit of structure.
Technical scheme of the present invention is: a kind of temperature-control circuit, be a kind of temperature-control circuit, form by the button that can return automatically and the heating of two groups of normally opened contacts of two bimetal strip thermostats, relay, electromagnetic coil relay, band normally opened contact with magnetic steel temperature limiter identical function; One group of normally opened contact of a described bimetal strip thermostat, relay and electromagnetic coil relay series connection back and power supply constitute the loop, and the button that can return automatically of described band normally opened contact is connected in parallel on this group normally opened contact of relay; Described heating links to each other with power supply by another group normally opened contact of relay; Described another bimetal strip thermostat, an end is connected with power supply, and the line between back one group of normally opened contact of the other end and above-mentioned heating and relay is connected, and this bimetal strip thermostat and heating are series connection.Above-mentioned heating is resistance heated and heating formula electric heating appliance, for example: heating wire.
Advantage of the present invention:
1, the magnetic steel temperature limiter that uses in the present invention and the now commercially available electric cooker is compared, and function is identical, and can use the electric hot plate of not perforate of center, such electric hot plate, can resemble to use and use the electric furnace, not have unsafe factor, therefore be convenient to develop multi-functional cooker.
2, in the present invention and the present commercially available electronic temperature control electric cooker, use sensor to compare as the electronic temperature control device of thermistor, thermopair, PN junction or integrated temperature sensor, after circuit starts to control, there is not electric current in the circuit, and present commercially available above-mentioned electronic temperature control electric cooker, after circuit starts to control,, still there is electric current in the electronic temperature control device though there is not electric current in the electrothermal tube.
The invention will be further described below in conjunction with drawings and Examples 1:
Fig. 1 is circuit theory diagrams of the present invention.
Wherein: 1, bimetal strip thermostat; 2, one of relay group of normally opened contact; 3, another group normally opened contact of relay; 4, the button of being with normally opened contact to return automatically; 5, electromagnetic coil relay; 6, heating; 7, bimetal strip thermostat.
Embodiment 1: as shown in Figure 1, a kind of temperature-control circuit, be a kind of temperature-control circuit, form by button 4, electromagnetic coil relay 5, heating 6 and bimetal strip thermostat 7 that bimetal strip thermostat 1, relay normally open contact group 2, relay normally open contact group 3, band normally opened contact can return automatically with magnetic steel temperature limiter identical function; Described bimetal strip thermostat 1, relay normally open contact group 2 and electromagnetic coil relay 5 series connection constitute the loop with power supply; The button 4 that the band normally opened contact can return automatically is connected in parallel on the relay normally open contact group 2; Described heating 6 links to each other with power supply by relay normally open contact group 3; One end of described bimetal strip thermostat 7 is connected with line between heating 6 and the relay normally open contact group 3, and the other end links to each other with power supply, and bimetal strip thermostat 7 is series connection with heating 6.
Described bimetal strip thermostat device 1, be equivalent to the temperature control circuit sensor, the temperature of the present invention's control is by bimetal strip thermostat 1 decision, present commercially available bimetal strip thermostat, all has the temperature control set screw, during use, when temperature rose to needed control temperature, two silver contacts in the bimetal strip thermostat 1 separated, and cut off circuit.Principle of work of the present invention is such: energized, click button 4, electromagnetic coil relay 5 energising work, relay normally open contact group 2 and normally opened contact group 3 closures, heating 6 work, after poach is done in the electric cooker, temperature rises to institute's controlling temperature, two silver contacts in the bimetal strip thermostat 1 separate, cut off circuit, make that no current passes through in the electromagnetic coil relay 5, so relay normally open contact group 2 and normally opened contact group 3 are recovered former states, when temperature is lower than institute's controlling temperature, though two silver contacts contact in the bimetal strip thermostat 1, no current still in the circuit, because normally opened contact group 2 and normally opened contact group 3 are normally open, its function is identical with magnetic steel temperature limiter.Bimetal strip thermostat 7 working temperature in auto-electric cooker using pottery is lower than bimetal strip thermostat 1, when temperature drops to when being lower than 7 controlling temperatures of bimetal strip thermostat, two silver contact closures of bimetal strip thermostat 7, heating 6 work, the function of bimetal strip thermostat 7 is: make the well-done meal automatic heat preserving of electric cooker.
Obviously, the present invention also can be used on other electrical equipment.
Introduce for several embodiment more below, the present invention is in the application in the electric cooking appliance.
Embodiment 2: Fig. 2 is for using a kind of circuit theory diagrams that use the multifunction electric cooker of three bimetal strip thermostats of the present invention.8 for working temperature is the bimetal strip thermostat of 250 degree Celsius among the figure, and this electric cooking appliance had both had the function of automatic electric rice cooker, had the function of electric chafing dish again, also had the function of electric frying pan.
Embodiment 3: Fig. 3 is for using a kind of electrical schematic diagram that had not only had the electronics saucepan but also had the electric kettle of automatic water boiler function of the present invention.
Embodiment 4: the temperature control set screw of bimetal strip thermostat among Fig. 17 lengthening, regulate institute's controlling temperature of bimetal strip thermostat 7 by the knob of electric cooking appliance outside, Fig. 1 promptly becomes the electrical schematic diagram of a kind of multifunction electric cooker that can cooking can cook again.
Embodiment 5: Fig. 4 is for using the multifunction electric cooker circuit of a kind of adjustable power of the present invention.Among the figure, heating 6 can be made as 500W, and heating 9 can be made as 1000W, so when electric cooking appliance used, power can divide third gear to regulate: 500W, 1000W and 1500W.Frame of broken lines is equivalent to 5 among Fig. 1 among the figure, because of the rated voltage of various relays, inhale moving voltage and release voltage is different, work under its defined terms in order to make relay, most applications, in order to make power supply step-down etc., all will be for solenoid increase some accessory circuits, the circuit in the frame of broken lines is because this is former thereby establish for electromagnetic coil relay.This belongs to the known technology of using relay.
Embodiment 6: Fig. 5 is for when electric frying pan uses, and power can be regulated, when automatic electric rice cooker uses, and the application that power cannot be regulated a kind of multifunction electric cooker circuit of the present invention.The button that band normally closed contact among the figure can return automatically also can.
Claims (1)
1, a kind of temperature-control circuit, be a kind of temperature-control circuit, it is characterized in that: form by button 4, electromagnetic coil relay 5, heating 6 and bimetal strip thermostat 7 that bimetal strip thermostat 1, relay normally open contact group 2, relay normally open contact group 3, band normally opened contact can return automatically with magnetic steel temperature limiter identical function; Described bimetal strip thermostat 1, relay normally open contact group 2 and electromagnetic coil relay 5 series connection constitute the loop with power supply; The button 4 that the band normally opened contact can return automatically is connected in parallel on the relay normally open contact group 2; Described heating 6 links to each other with power supply by relay normally open contact group 3; One end of described bimetal strip thermostat 7 is connected with line between heating 6 and the relay normally open contact group 3, and the other end links to each other with power supply, and bimetal strip thermostat 7 is series connection with heating 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94106601 CN1114057A (en) | 1994-06-14 | 1994-06-14 | Temp. control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94106601 CN1114057A (en) | 1994-06-14 | 1994-06-14 | Temp. control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1114057A true CN1114057A (en) | 1995-12-27 |
Family
ID=5032602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94106601 Pending CN1114057A (en) | 1994-06-14 | 1994-06-14 | Temp. control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1114057A (en) |
-
1994
- 1994-06-14 CN CN 94106601 patent/CN1114057A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |