CN209787478U - Safe over-temperature protection electric ceramic furnace circuit and electric ceramic furnace - Google Patents
Safe over-temperature protection electric ceramic furnace circuit and electric ceramic furnace Download PDFInfo
- Publication number
- CN209787478U CN209787478U CN201920145903.7U CN201920145903U CN209787478U CN 209787478 U CN209787478 U CN 209787478U CN 201920145903 U CN201920145903 U CN 201920145903U CN 209787478 U CN209787478 U CN 209787478U
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- circuit
- electric ceramic
- temperature
- control switch
- temperature protection
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- 239000000919 ceramic Substances 0.000 title claims abstract description 33
- 238000010438 heat treatment Methods 0.000 claims abstract description 29
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 20
- 230000001105 regulatory effect Effects 0.000 claims abstract description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 6
- 239000010703 silicon Substances 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims 3
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 241001122767 Theaceae Species 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Electric Stoves And Ranges (AREA)
- Control Of Resistance Heating (AREA)
Abstract
The utility model relates to an electrical product field especially relates to a safe excess temperature protection electric ceramic stove circuit and electric ceramic stove. The utility model adopts the following technical scheme: the control circuit comprises a power regulating circuit and an over-temperature protection circuit which are mutually connected in series, the control circuit is connected with a control end of a bidirectional silicon controlled rectifier circuit through a bidirectional exciting diode, an alternating current power supply is connected with the heating disc through the bidirectional silicon controlled rectifier circuit, and the control circuit of the electric ceramic furnace circuit is arranged in an independent controller. The utility model has the advantages that: the over-temperature protection circuit with the bimetallic strip temperature control switch is directly connected in series with the power regulating circuit and carries out power control on the heating disc, the characteristics of different action temperatures and different reset temperatures of the bimetallic strip temperature control switch are utilized, the circuit is prevented from being frequently switched, the service life of a product is prolonged, and the safety of the product is guaranteed.
Description
Technical Field
The utility model relates to an electrical product field especially relates to a safe excess temperature protection electric ceramic stove circuit and electric ceramic stove.
Background
The electric ceramic stove is a common electric appliance product, it is mostly used for making tea and boiling water, make it generate heat through circular telegram to the dish that generates heat, thereby heat the pot body on placing the dish that generates heat, current electric ceramic stove excess temperature protection, mostly set up thermistor in the dish bottom that generates heat and carry out temperature measurement, when the temperature reaches a definite value, thermistor's resistance can take place the jump formula and increase, thereby protect the circuit excess temperature, and thermistor's switching temperature is the fixed value, when the temperature drops to switching temperature, the circuit resumes normally, thereby make the circuit frequently switch over the state, cause the damage to electronic component, also cause the damage to the dish that generates heat easily, and adopt the higher temperature sensor of precision can realize distinguishing excess temperature and recovery temperature, nevertheless need complicated circuit to control.
Disclosure of Invention
An object of the utility model is to provide a safe excess temperature protection electric ceramic stove circuit and electric ceramic stove specifically lie in providing a simple structure and safe durable excess temperature protection electric ceramic stove circuit and electric ceramic stove.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the safe over-temperature protection electric ceramic furnace circuit comprises a heating disc and a control circuit, wherein the control circuit comprises a power regulating circuit and an over-temperature protection circuit which are mutually connected in series, the control circuit is connected with a control end of a bidirectional silicon controlled rectifier circuit through a bidirectional exciting diode, and an alternating current power supply is connected with the heating disc through the bidirectional silicon controlled rectifier circuit.
Furthermore, the power regulating circuit is a potentiometer, the over-temperature protection circuit comprises a first resistor, a second resistor and a temperature control switch, and the second resistor is connected with the first resistor in parallel after being connected with the temperature control switch in series.
Furthermore, the temperature control switch adopts a bimetallic strip temperature control switch.
The output end of the timing circuit is connected with a coil of the relay through a relay driving circuit, and a connecting contact of the relay is connected between the control circuit and the bidirectional exciting diode in series.
Further, the timing circuit adopts a CD4541 timer circuit.
An electric ceramic stove comprises a stove body, a controller and the electric ceramic stove circuit, wherein a heating disc is arranged in the stove body, the control circuit is arranged in the controller, and a temperature control switch of the control circuit is arranged below the heating disc in the stove body.
Further, set up protection sheetmetal below generating heat, protection sheetmetal below is provided with the fixed bolster, temperature detect switch passes through the screw fixation on the fixed bolster, and temperature detect switch's metal capping towards protection sheetmetal.
The utility model has the advantages that: the over-temperature protection circuit with the bimetallic strip temperature control switch is directly connected in series with the power regulating circuit and carries out power control on the heating disc, the characteristics of different action temperatures and different reset temperatures of the bimetallic strip temperature control switch are utilized, the circuit is prevented from being frequently switched, the service life of a product is prolonged, and the safety of the product is guaranteed.
Drawings
FIG. 1 is a schematic diagram of a circuit of a safe over-temperature protection electric ceramic furnace in embodiment 1;
Fig. 2 is a schematic structural diagram of an electric ceramic furnace in embodiment 1.
Detailed Description
Example 1: referring to fig. 1, a safe over-temperature protection electric ceramic furnace circuit comprises a heating disc 1 and a control circuit 2, wherein the control circuit 2 comprises a power regulating circuit 3 and an over-temperature protection circuit 4 which are connected in series, the control circuit 2 is connected with a control end of a bidirectional thyristor circuit through a bidirectional exciting diode, and an alternating current power supply is connected with the heating disc 1 through the bidirectional thyristor circuit; the power regulation 3 circuit is a potentiometer, the over-temperature protection circuit 4 comprises a first resistor, a second resistor and a temperature control switch 41, and the second resistor is connected with the first resistor in parallel after being connected with the temperature control switch 41 in series; the temperature control switch 41 is a bimetallic strip temperature control switch.
In this embodiment, the control circuit 2 controls the bidirectional thyristor circuit through the bidirectional thyristor, the control circuit 2 can change the conduction angle of the bidirectional thyristor by changing the resistance value only, so as to change the average current of the bidirectional thyristor circuit when conducting, and thus adjust the power of the heating panel 1, wherein the power adjusting circuit 3 adopts a potentiometer, the resistance value of the bidirectional thyristor can be adjusted through the adjustment of the potentiometer, so as to adjust the power of the heating panel 1, in addition, the over-temperature protection circuit 4 controls the resistance value of the over-temperature protection circuit 4 through the temperature control switch 41, when the temperature of the heating panel 1 detected by the temperature control switch 41 is lower than the action temperature, the temperature control switch 41 is in a normal conducting state, so that the first resistor and the second resistor are connected in parallel, and thus the resistance of the over-temperature protection circuit 4 is in a normal value, when the temperature of the heating plate 1 detected by the temperature control switch 41 is higher than the action temperature, the temperature control switch 41 is in an off state, so that only the first resistor is connected in series with the power regulating circuit 3, so that the integral resistance value of the control circuit 2 is increased, so that the power of the heating plate 1 is reduced, the temperature of the heating plate 1 is reduced, the electric ceramic oven is protected, when the temperature control switch 41 detects that the temperature of the heating plate 1 is lower than the action temperature and higher than the reset temperature, the temperature control switch 41 still keeps the off state, so that the power output by the circuit is not influenced, the damage of elements caused by frequent switching of the output power by the circuit is avoided, when the temperature of the heating plate 1 detected by the temperature control switch 41 is lower than the reset temperature, the temperature control switch 41 automatically resets to the on state, so that the second resistor is switched on, and the resistance value of the over-temperature protection circuit 4, thereby automatically restoring the circuit to normal. The temperature control switch 41 is a bimetallic strip temperature control switch, and can select a corresponding temperature control switch according to the required action temperature and reset temperature, and the bimetallic strip temperature control switch is a mechanical temperature control switch, so that the bimetallic strip temperature control switch cannot be interfered by external factors such as electromagnetism, and has long service life, thereby ensuring the reliability of the over-temperature protection circuit 4.
further, the device also comprises a timing circuit 5 and a relay 6, wherein the output end of the timing circuit 5 is connected with a coil of the relay 6 through a relay driving circuit, and a connecting contact of the relay 6 is connected in series between the control circuit 2 and the bidirectional excitation diode; the timing circuit 5 adopts a CD4541 timer circuit.
In a further embodiment, control relay drive circuit through CD4541 timer circuit, can start after the definite time at the circuit, through control relay drive circuit disconnection, make the contact disconnection of relay 6, thereby disconnection control circuit 3, and then make the dish 2 that generates heat the outage, can set up the oscillating resistance and the oscillating capacitor who is connected to the CD4541 chip according to the time that needs started, reach the purpose of control timing, avoid the potential safety hazard that long-time circular telegram arouses, wherein relay drive circuit can adopt triode switch circuit as control switch, triode switch circuit's control end is connected to timing circuit 5's output.
Referring to fig. 2, an electric ceramic stove comprises a stove body 7, a controller 8 and the electric ceramic stove circuit, wherein a heating disc 1 is arranged in the stove body 7, a control circuit 2 is arranged in the controller 8, and a temperature control switch 41 of the control circuit 2 is arranged below the heating disc 1 in the stove body 7; heating plate 1 below sets up protection sheetmetal 11, and protection sheetmetal 11 below is provided with fixed bolster 12, and temperature detect switch 41 passes through the screw fixation on fixed bolster 12, and temperature detect switch 41's metal capping face is towards protection sheetmetal 11.
In the embodiment, the temperature control switch 41 is arranged below the heating plate 1 to detect the temperature of the heating plate 1 in real time, and the control circuit 2 is arranged in the separate controller 8, so that the control circuit 2 can be prevented from being influenced by high temperature in the furnace body 7, and a user can conveniently control the heating plate 1 of the furnace body 7; meanwhile, the temperature control switch 41 is fixed by the fixing support 12, so that the stability of the temperature control switch 41 for detecting the temperature of the heating plate 1 can be improved, and the condition that the temperature detection is unstable due to the movement of the position of the temperature control switch 41 is avoided.
Of course, the above is only the preferred embodiment of the present invention, and the application range of the present invention is not limited thereto, so all the equivalent changes made in the principle of the present invention should be included in the protection range of the present invention.
Claims (7)
1. The utility model provides a safe excess temperature protection electric ceramic stove circuit, includes dish and control circuit that generate heat, its characterized in that: the control circuit comprises a power regulating circuit and an over-temperature protection circuit which are connected in series, the control circuit is connected with the control end of the bidirectional silicon controlled rectifier circuit through a bidirectional exciting diode, and the alternating current power supply is connected with the heating disc through the bidirectional silicon controlled rectifier circuit.
2. The electric ceramic furnace circuit with the safety over-temperature protection function as claimed in claim 1, wherein: the power regulating circuit is a potentiometer, the over-temperature protection circuit comprises a first resistor, a second resistor and a temperature control switch, and the second resistor is connected with the first resistor in parallel after being connected with the temperature control switch in series.
3. The electric ceramic furnace circuit with the safety over-temperature protection function as claimed in claim 2, wherein: the temperature control switch adopts a bimetallic strip temperature control switch.
4. The electric ceramic furnace circuit with the safety over-temperature protection function as claimed in claim 3, wherein: the power supply circuit also comprises a timing circuit and a relay, wherein the output end of the timing circuit is connected with a coil of the relay through a relay driving circuit, and a connecting contact of the relay is connected between the control circuit and the bidirectional exciting diode in series.
5. The electric ceramic furnace circuit with the safety over-temperature protection function as claimed in claim 4, wherein: the timing circuit adopts a CD4541 timer circuit.
6. An electric ceramic stove is characterized in that: the electric ceramic furnace comprises a furnace body, a controller and an electric ceramic furnace circuit according to any one of claims 2 to 5, wherein the heating disc is arranged in the furnace body, the control circuit is arranged in the controller, and a temperature control switch of the control circuit is arranged below the heating disc in the furnace body.
7. An electric ceramic stove as claimed in claim 6, characterised in that: the heating plate is characterized in that a protective metal sheet is arranged below the heating plate, a fixing support is arranged below the protective metal sheet, the temperature control switch is fixed on the fixing support through screws, and the metal cover surface of the temperature control switch faces the protective metal sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920145903.7U CN209787478U (en) | 2019-01-28 | 2019-01-28 | Safe over-temperature protection electric ceramic furnace circuit and electric ceramic furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920145903.7U CN209787478U (en) | 2019-01-28 | 2019-01-28 | Safe over-temperature protection electric ceramic furnace circuit and electric ceramic furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209787478U true CN209787478U (en) | 2019-12-13 |
Family
ID=68793876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920145903.7U Expired - Fee Related CN209787478U (en) | 2019-01-28 | 2019-01-28 | Safe over-temperature protection electric ceramic furnace circuit and electric ceramic furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209787478U (en) |
-
2019
- 2019-01-28 CN CN201920145903.7U patent/CN209787478U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191213 |