CN215187426U - Heating protection circuit and heating equipment - Google Patents
Heating protection circuit and heating equipment Download PDFInfo
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- CN215187426U CN215187426U CN202121619777.8U CN202121619777U CN215187426U CN 215187426 U CN215187426 U CN 215187426U CN 202121619777 U CN202121619777 U CN 202121619777U CN 215187426 U CN215187426 U CN 215187426U
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 79
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 41
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 39
- 239000010703 silicon Substances 0.000 claims abstract description 39
- 239000003990 capacitor Substances 0.000 claims description 16
- 230000007935 neutral effect Effects 0.000 claims 2
- 238000010304 firing Methods 0.000 abstract description 7
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 4
- 208000025274 Lightning injury Diseases 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
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Abstract
The embodiment of the utility model provides a pair of heating protection circuit and firing equipment, heating protection circuit, include: the device comprises a silicon controlled drive circuit, a PTC heating device, a negative temperature coefficient thermistor, an alternating current live wire and an alternating current zero line; the alternating current live wire, the silicon controlled drive circuit, the PTC heating device, the negative temperature coefficient thermistor and the alternating current zero line are sequentially connected in series to form a loop. The utility model discloses a series connection one is used for absorbing the negative temperature coefficient thermistor of most energy under thunderbolt or the high-pressure impact in PTC heating circuit, protects the silicon controlled rectifier to avoid because the silicon controlled rectifier damages to lead to PTC heating device to last the heating to arouse the incident emergence that the consumer scalded.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to the technical field of household appliances, in particular to heating protection circuit and firing equipment.
[ background of the invention ]
At present, for a heating device for keeping warm by using the PTC heating device, a thyristor for controlling the PTC heating device to be turned off is generally included. Under the condition of lightning stroke or high-voltage impact, the silicon controlled rectifier is frequently damaged, so that the PTC heating device is continuously heated, and the safety accident that a consumer is scalded is caused.
[ Utility model ] content
The utility model provides a heating protection circuit and firing equipment through establish ties one in PTC heating circuit and be used for absorbing the negative temperature coefficient thermistor of most energy under thunderbolt or the high-pressure impact, protection silicon controlled rectifier to avoid because the silicon controlled rectifier damages to lead to PTC heating device to last the heating to arouse the incident emergence that the consumer scalded.
In order to solve the above problem, the utility model provides a following scheme:
in a first aspect, a thermal protection circuit is provided, including: the device comprises a silicon controlled drive circuit, a PTC heating device, a negative temperature coefficient thermistor, an alternating current live wire and an alternating current zero line;
the alternating current live wire, the silicon controlled drive circuit, the PTC heating device, the negative temperature coefficient thermistor and the alternating current zero line are sequentially connected in series to form a loop.
The utility model discloses a negative temperature coefficient thermistor of establishing ties in PTC heating circuit, at during operation inoperative, can absorb the thunderbolt or the most energy that produces under the high-pressure impact when out of work, protection silicon controlled rectifier to avoid because the silicon controlled rectifier damages to lead to PTC heating device sustained heating to arouse the incident emergence that the consumer scalded.
Optionally, the thyristor drive circuit includes: a first node, a second node, a third node and a fourth node;
the first node is electrically connected with the AC live wire; the second node is electrically connected with the PTC heating device; the fourth node is grounded;
and the third node is electrically connected with the singlechip.
The utility model discloses a single chip microcomputer control silicon controlled rectifier drive circuit to control PTC heating device's shutoff.
Optionally, the thyristor driving circuit further includes: the third node, the thyristor, the triode, the capacitor, the first resistor, the second resistor, the third resistor and the fourth resistor are connected in series;
the controllable silicon comprises a first electrode, a second electrode and a third electrode;
wherein the first electrode is electrically connected to the first junction, the second electrode is electrically connected to the second junction, and the third electrode is electrically connected to the fifth junction;
one end of the capacitor is electrically connected with the first node, and the other end of the capacitor is electrically connected with the fifth node;
one end of the first resistor is electrically connected with the fifth node, and the other end of the first resistor is electrically connected with one end of the second resistor; the other end of the second resistor is electrically connected with the collector of the triode;
an emitting electrode of the triode is electrically connected with the fourth node, and a base electrode of the triode is electrically connected with one end of the third resistor; the other end of the third resistor is electrically connected with the third junction;
one end of the fourth resistor is electrically connected with the base electrode of the triode, and the other end of the fourth resistor is electrically connected with the fourth node.
The utility model discloses a turn-off that PTC heating device was controlled to the silicon controlled rectifier break-make among the control silicon controlled rectifier drive circuit.
Optionally, the first electrode is a T1 electrode of the thyristor, the second electrode is a T2 electrode of the thyristor, and the third electrode is a G electrode of the thyristor.
The utility model discloses a T1 electrode with the silicon controlled rectifier is connected with the live wire electricity, is connected T2 electrode and PTC heating device electricity, passes through the resistance with the G electrode and is connected with the triode electricity, thereby can realize controlling PTC heating device's shutoff through the single chip microcomputer control triode control silicon controlled rectifier break-make.
Alternatively, the resistance value of the negative temperature coefficient thermistor at normal temperature is 22 Ω, and the maximum allowable current value is 2A.
The utility model selects the negative temperature coefficient thermistor with the resistance value of 22 omega at normal temperature and the allowed maximum current value of 2A, and the PTC heating device with the rated power of 15W, so that the negative temperature coefficient thermistor hardly plays a role in working; when the negative temperature coefficient thermistor does not work, the function of lightning stroke resistance or abnormal high voltage impact resistance can be achieved, and safety accidents caused by damage of the controlled silicon are avoided.
In a second aspect, there is provided a heating apparatus comprising: a heating protection circuit; the heating protection circuit includes: the device comprises a silicon controlled drive circuit, a PTC heating device, a negative temperature coefficient thermistor, an alternating current live wire and an alternating current zero line;
the alternating current live wire, the silicon controlled drive circuit, the PTC heating device, the negative temperature coefficient thermistor and the alternating current zero line are sequentially connected in series to form a loop.
Optionally, the thyristor drive circuit includes: a first node, a second node, a third node and a fourth node;
the first node is electrically connected with the AC live wire; the second node is electrically connected with the PTC heating device; the fourth node is grounded;
and the third node is electrically connected with the singlechip.
Optionally, the thyristor driving circuit further includes: the third node, the thyristor, the triode, the capacitor, the first resistor, the second resistor, the third resistor and the fourth resistor are connected in series;
the controllable silicon comprises a first electrode, a second electrode and a third electrode;
wherein the first electrode is electrically connected to the first junction, the second electrode is electrically connected to the second junction, and the third electrode is electrically connected to the fifth junction;
one end of the capacitor is electrically connected with the first node, and the other end of the capacitor is electrically connected with the fifth node;
one end of the first resistor is electrically connected with the fifth node, and the other end of the first resistor is electrically connected with one end of the second resistor; the other end of the second resistor is electrically connected with the collector of the triode;
an emitting electrode of the triode is electrically connected with the fourth node, and a base electrode of the triode is electrically connected with one end of the third resistor; the other end of the third resistor is electrically connected with the third junction;
one end of the fourth resistor is electrically connected with the base electrode of the triode, and the other end of the fourth resistor is electrically connected with the fourth node.
Optionally, the first electrode is a T1 electrode of the thyristor, the second electrode is a T2 electrode of the thyristor, and the third electrode is a G electrode of the thyristor.
Alternatively, the resistance value of the negative temperature coefficient thermistor at normal temperature is 22 Ω, and the maximum allowable current value is 2A.
The utility model provides a pair of heating protection circuit and firing equipment, heating protection circuit, include: the device comprises a silicon controlled drive circuit, a PTC heating device, a negative temperature coefficient thermistor, an alternating current live wire and an alternating current zero line; the alternating current live wire, the silicon controlled drive circuit, the PTC heating device, the negative temperature coefficient thermistor and the alternating current zero line are sequentially connected in series to form a loop. The utility model discloses a series connection one is used for absorbing the negative temperature coefficient thermistor of most energy under thunderbolt or the high-pressure impact in PTC heating circuit, protects the silicon controlled rectifier to avoid because the silicon controlled rectifier damages to lead to PTC heating device to last the heating to arouse the incident emergence that the consumer scalded.
[ description of the drawings ]
Fig. 1 is a schematic diagram of a heating protection circuit according to an embodiment of the present invention;
fig. 2 is a detailed schematic diagram of the heating protection circuit in fig. 1.
[ detailed description ] embodiments
The technical solution of the present invention will be further described in detail with reference to the drawings and specific embodiments.
Fig. 1 is a schematic diagram of a heating protection circuit according to an embodiment of the present invention, and fig. 2 is a specific schematic diagram of the heating protection circuit in fig. 1.
As shown in fig. 1 to 2, the heating protection circuit includes: the device comprises a silicon controlled drive circuit 10, a PTC heating device 20, a negative temperature coefficient thermistor 30, an alternating current live wire ACL and an alternating current null line ACN; an alternating current live wire ACL, a silicon controlled drive circuit 10, a PTC heating device 20, a negative temperature coefficient thermistor 30 and an alternating current null line ACN are connected in series in sequence to form a loop.
Wherein, silicon controlled rectifier drive circuit 10 includes: a first node 101, a second node 102, a third node 103, and a fourth node 104. The first node 101 is electrically connected to an ac live line ACL; the second junction 102 is electrically connected to the PTC heating device 20; the fourth node 104 is grounded. And the third node 103 is used for being electrically connected with the singlechip.
As shown in fig. 2, the thyristor driving circuit 10 further includes: fifth junction 105, thyristor 106, transistor 107, capacitor 108, first resistor 109, second resistor 110, third resistor 111, and fourth resistor 112.
In the embodiment of the present invention, the thyristor 106 comprises a bidirectional thyristor.
The thyristor 106 includes: a first electrode 1061, a second electrode 1062, and a third electrode 1063. The first electrode 1061 is electrically connected to the first node 101, the second electrode 1062 is electrically connected to the second node 102, and the third electrode 1063 is electrically connected to the fifth node 105.
In this embodiment, the first electrode 1061 is a T1 electrode of the thyristor 106, the second electrode 1062 is a T2 electrode of the thyristor 106, and the third electrode 1063 is a G electrode of the thyristor 106.
One end of the capacitor 108 is electrically connected to the first node 101, and the other end of the capacitor 108 is electrically connected to the fifth node 105.
For example, the capacitance value of the capacitor 108 is 0.01 uF.
One end of the first resistor 109 is electrically connected to the fifth node 105, and the other end of the first resistor 109 is electrically connected to one end of the second resistor 110. The other end of the second resistor 110 is electrically connected to the collector c of the transistor 107.
In the embodiment of the present invention, since the first resistor 109 and the second resistor 110 are connected in series, it is only necessary to ensure that the sum of the resistance values of the first resistor 109 and the second resistor 110 is a fixed value. For example, the sum of the resistance values of the first resistor 109 and the second resistor 110 is a fixed value of 200 Ω.
For example, transistor 107 is rated for a current of 1.5A.
An emitter e of the transistor 107 is electrically connected to the fourth node 104, and a base b of the transistor 107 is electrically connected to one end of the third resistor 111. The other end of the third resistor 111 is electrically connected to the third node 103.
For example, the resistance value of the third resistor 111 is 1K Ω.
From the above, the third node 103 is used for being electrically connected with the single chip microcomputer, so the embodiment of the present invention controls the switching on and off of the thyristor 106 to control the PTC heating device 20 through the single chip microcomputer control triode 107.
One end of the fourth resistor 112 is electrically connected to the base b of the transistor, and the other end of the fourth resistor 112 is electrically connected to the fourth node 104.
For example, the fourth resistor 112 has a resistance value of 2K Ω.
In this embodiment, the resistance value of the ntc thermistor 30 at normal temperature is 22 Ω, and the maximum allowable current value is 2A.
For example, the negative temperature coefficient thermistor 30 includes an NTC thermistor.
For example, the PTC heating device 20 has a rated power of 15W. According to the power formula P ═ UI, the current I ═ P/U ═ 15W/220V ═ 68mA in the heating protection circuit. Therefore, the current flowing through the ntc thermistor 30 is also 68mA, and the power P1 of the ntc thermistor 30 is 0.068A × 22 Ω — 0.1W — I2R. Since the temperature of the ntc thermistor 30 will increase when power is applied to the ntc thermistor 30, and since the ntc thermistor 30 is a ntc thermistor, the resistance will decrease, so that the power P1 of the ntc thermistor 30 decreases, and a dynamic balance is achieved, so that the ntc thermistor 30 will hardly function when operating. When the negative temperature coefficient thermistor 30 does not work, the function of lightning stroke resistance or abnormal high voltage impact resistance can be achieved, and safety accidents caused by damage of the controllable silicon 10 are avoided.
The embodiment of the utility model provides a pair of heating protection circuit and firing equipment, heating protection circuit, include: the device comprises a silicon controlled drive circuit, a PTC heating device, a negative temperature coefficient thermistor, an alternating current live wire and an alternating current zero line; the alternating current live wire, the silicon controlled drive circuit, the PTC heating device, the negative temperature coefficient thermistor and the alternating current zero line are sequentially connected in series to form a loop. The utility model discloses a series connection one is used for absorbing the negative temperature coefficient thermistor of most energy under thunderbolt or the high-pressure impact in PTC heating circuit, protects the silicon controlled rectifier to avoid because the silicon controlled rectifier damages to lead to PTC heating device to last the heating to arouse the incident emergence that the consumer scalded.
The embodiment of the utility model provides a still provide a firing equipment, firing equipment includes the heating protection circuit that the embodiment that figure 1 ~ figure 2 correspond provided.
It should be noted that, the heating protection circuit in this embodiment may refer to the heating protection circuit provided in the embodiment corresponding to fig. 1 to fig. 2, and the technical solution and the technical effect are similar and are not described herein again.
It should be noted that the present embodiment does not limit the type of the heating device. For example, a health preserving pot with a heat preserving cup, etc.
It should be noted that the terms "first," "second," "third," "fourth," and the like (if any) in the description and claims of the present invention and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A thermal protection circuit, comprising: the device comprises a silicon controlled drive circuit (10), a PTC heating device (20), a negative temperature coefficient thermistor (30), an alternating current live wire (ACL) and an alternating current neutral wire (ACN);
the alternating current live wire (ACL), the silicon controlled drive circuit (10), the PTC heating device (20), the negative temperature coefficient thermistor (30) and the alternating current zero line (ACN) are sequentially connected in series to form a loop.
2. The thermal protection circuit according to claim 1, wherein said thyristor driver circuit (10) comprises: a first node (101), a second node (102), a third node (103), and a fourth node (104);
the first node (101) is electrically connected with the AC live wire (ACL); the second junction (102) is electrically connected with the PTC heating device (20); said fourth node (104) is grounded;
and the third node (103) is electrically connected with the single chip microcomputer.
3. The thermal protection circuit of claim 2, wherein said thyristor driver circuit (10) further comprises: a fifth node (105), a thyristor (106), a triode (107), a capacitor (108), a first resistor (109), a second resistor (110), a third resistor (111) and a fourth resistor (112);
the controllable silicon (106) comprises a first electrode (1061), a second electrode (1062) and a third electrode (1063);
wherein the first electrode (1061) is electrically connected to the first node (101), the second electrode (1062) is electrically connected to the second node (102), and the third electrode (1063) is electrically connected to the fifth node (105);
one end of the capacitor (108) is electrically connected with the first node (101), and the other end of the capacitor (108) is electrically connected with the fifth node (105);
one end of the first resistor (109) is electrically connected with the fifth node (105), and the other end of the first resistor (109) is electrically connected with one end of the second resistor (110); the other end of the second resistor (110) is electrically connected with a collector (c) of the triode (107);
an emitter (e) of the triode (107) is electrically connected with the fourth node (104), and a base (b) of the triode (107) is electrically connected with one end of the third resistor (111); the other end of the third resistor (111) is electrically connected with the third junction (103);
one end of the fourth resistor (112) is electrically connected with the base (b) of the triode, and the other end of the fourth resistor (112) is electrically connected with the fourth node (104).
4. The thermal protection circuit of claim 3, wherein the first electrode (1061) is a T1 electrode of the thyristor (106), the second electrode (1062) is a T2 electrode of the thyristor (106), and the third electrode (1063) is a G electrode of the thyristor (106).
5. The thermal protection circuit according to claim 1, wherein the negative temperature coefficient thermistor (30) has a resistance value of 22 Ω at normal temperature, and allows a maximum current value of 2A to pass therethrough.
6. A heating apparatus, comprising: a heating protection circuit; the heating protection circuit includes: the device comprises a silicon controlled drive circuit (10), a PTC heating device (20), a negative temperature coefficient thermistor (30), an alternating current live wire (ACL) and an alternating current neutral wire (ACN);
the alternating current live wire (ACL), the silicon controlled drive circuit (10), the PTC heating device (20), the negative temperature coefficient thermistor (30) and the alternating current zero line (ACN) are sequentially connected in series to form a loop.
7. The heating device according to claim 6, wherein the thyristor drive circuit (10) comprises: a first node (101), a second node (102), a third node (103), and a fourth node (104);
the first node (101) is electrically connected with the AC live wire (ACL); the second junction (102) is electrically connected with the PTC heating device (20); said fourth node (104) is grounded;
and the third node (103) is electrically connected with the single chip microcomputer.
8. The heating device according to claim 7, wherein the thyristor drive circuit (10) further comprises: a fifth node (105), a thyristor (106), a triode (107), a capacitor (108), a first resistor (109), a second resistor (110), a third resistor (111) and a fourth resistor (112);
the controllable silicon (106) comprises a first electrode (1061), a second electrode (1062) and a third electrode (1063);
wherein the first electrode (1061) is electrically connected to the first node (101), the second electrode (1062) is electrically connected to the second node (102), and the third electrode (1063) is electrically connected to the fifth node (105);
one end of the capacitor (108) is electrically connected with the first node (101), and the other end of the capacitor (108) is electrically connected with the fifth node (105);
one end of the first resistor (109) is electrically connected with the fifth node (105), and the other end of the first resistor (109) is electrically connected with one end of the second resistor (110); the other end of the second resistor (110) is electrically connected with a collector (c) of the triode (107);
an emitter (e) of the triode (107) is electrically connected with the fourth node (104), and a base (b) of the triode (107) is electrically connected with one end of the third resistor (111); the other end of the third resistor (111) is electrically connected with the third junction (103);
one end of the fourth resistor (112) is electrically connected with the base (b) of the triode, and the other end of the fourth resistor (112) is electrically connected with the fourth node (104).
9. The heating apparatus according to claim 8, wherein the first electrode (1061) is a T1 electrode of the thyristor (106), the second electrode (1062) is a T2 electrode of the thyristor (106), and the third electrode (1063) is a G electrode of the thyristor (106).
10. The heating apparatus according to claim 6, wherein the negative temperature coefficient thermistor (30) has a resistance value of 22 Ω at normal temperature, and allows a maximum current value of 2A to pass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121619777.8U CN215187426U (en) | 2021-07-16 | 2021-07-16 | Heating protection circuit and heating equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121619777.8U CN215187426U (en) | 2021-07-16 | 2021-07-16 | Heating protection circuit and heating equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215187426U true CN215187426U (en) | 2021-12-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121619777.8U Active CN215187426U (en) | 2021-07-16 | 2021-07-16 | Heating protection circuit and heating equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215187426U (en) |
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2021
- 2021-07-16 CN CN202121619777.8U patent/CN215187426U/en active Active
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