CN2779779Y - Protection control circuit of heating device - Google Patents
Protection control circuit of heating device Download PDFInfo
- Publication number
- CN2779779Y CN2779779Y CN 200520056889 CN200520056889U CN2779779Y CN 2779779 Y CN2779779 Y CN 2779779Y CN 200520056889 CN200520056889 CN 200520056889 CN 200520056889 U CN200520056889 U CN 200520056889U CN 2779779 Y CN2779779 Y CN 2779779Y
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- CN
- China
- Prior art keywords
- loop
- cpu
- ptc
- temperature
- circuit
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- 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 - Lifetime
Links
- 238000010438 heat treatment Methods 0.000 title abstract 6
- 238000005485 electric heating Methods 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 101100189632 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) PTC6 gene Proteins 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000010259 detection of temperature stimulus Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Control Of Resistance Heating (AREA)
Abstract
The utility model provides a protection control circuit of device that generates heat belongs to the electron field. The circuit consists of a CPU, a control loop and an auxiliary heating loop, wherein a direct current power supply, a voltage dividing resistor and at least one recoverable PTC are connected to the periphery of one control pin of the CPU, and the PTC is arranged near a heating device. By utilizing the characteristics of the PTC, when the temperature is higher than a certain degree, the resistance sharply rises, so that the voltage corresponding to a control pin of the CPU sharply rises, and the CPU sends a signal to a control loop according to a set program to further cut off the circuit, thereby achieving the purpose of high reliability. The utility model has the advantages that: when the circuit is abnormal in temperature and current, the loop is cut off, and the working reliability of the heating device is greatly improved. And (II) the PTC is firstly protected, so that the service time of the temperature limiter and the fuse can be effectively prolonged. And thirdly, the auxiliary heating loop is electrified, and the indoor fan of the air conditioner must be turned on, so that the working temperature of the heating device is reduced.
Description
Technical field:
The utility model relates to the connecting circuit of electronic devices and components, specially refers to a kind of connecting circuit that can protect heater members.
Background technology:
To the protection of heater members such as electric heating tube, normally in circuit, connected temperature limiter and fuse, temperature controlling and fuse are reached the purpose of protection heater members by temperature limiter to the control of electric current.But any one occur to damage or during quality problems when these two devices, will short circuit in the process of using the device that damages appears, will produce major hidden dangers such as fire like this, be easy to damage heater members.
Summary of the invention:
The purpose of this utility model is to provide a kind of circuit connection structure of energy duplicate protection heater members.Not only finite temperature device and fuse are protected heater members in circuit, also in real time the situation of circuit is monitored by CPU heater members is protected.Near the control pin periphery of CPU, heater members, add a recoverable PTC, utilize the characteristic of PTC, after temperature occurring and being higher than certain degree, resistance sharply rises, thereby CPU control pin correspondent voltage sharply rises, CPU sends control signal according to the program that configures to control loop, and then cuts off circuit by control loop, thereby reaches the purpose of high reliability.
The purpose of this utility model is achieved in that the protection control circuit of heater members; form by CPU, control loop, auxilliary hot loop; described auxilliary hot loop is connected with temperature limiter, heater members and fuse; it is characterized in that: described CPU is connected with DC power supply, divider resistance and at least one recoverable PTC, and described CPU also is connected with control loop and auxilliary hot loop.
Its second feature is: described heater members is an electric heating tube.
Its 3rd feature is: described heater members is the PTC heater element.
The utility model has the advantages that: (one), when temperature and current anomaly situation appear in circuit, cut-off loop improves the reliability of heater members work greatly; (2), PTC protects earlier, can effectively prolong the service time of temperature limiter and fuse.(3), realize auxilliary hot loop energising, air conditioning chamber's inner blower must be opened, the temperature when having reduced heater members work.
Description of drawings:
Fig. 1 is that embodiment of the present utility model one system connects sketch;
Embodiment:
Embodiment one:
According to shown in Figure 1, the heater members protective circuit is connected with CPU1, and the control pin of CPU1 has connected control loop 2 and auxilliary hot loop 9, is connected with temperature limiter 3, heater members 7 and fuse 8 in the auxilliary hot loop 9; The another one control pin of CPU1 is connected with DC power supply 5, divider resistance 4 and recoverable PTC6, and recoverable PTC6 is near heater members 7 simultaneously.When abnormal conditions appear in electric current or temperature in the circuit that is connected with heater members 7, can carry out triple protection to heater members 7 by this protective circuit: the control pin periphery of (1) CPU1 has connected divider resistance 4 and recoverable PTC6, after 7 temperature of heater members in the circuit are higher than certain degree, the resistance that can recover PTC6 sharply rises, thereby CPU1 control pin correspondent voltage sharply rises, the program that CPU1 configures according to self, by detecting current potential, in time send high level signal to control loop 2, control loop 2 can be cut off the electricity supply, and reaches the protection to heater members 7; (2) when auxilliary hot loop 2 is switched on, by CPU control, the blower fan of indoor apparatus of air conditioner has so just reduced temperature on every side when heater members 7 is worked simultaneously also in work, has strengthened the protection to heater members 7; When (3) too high or electric current was excessive when temperature in the auxilliary hot loop 2,8 pairs of heater members 7 of temperature limiter 3 or fuse were protected, and had improved the stability of heater members 7 work.Simultaneously, when carrying out the detection of temperature and current value, restorability PTC6 detects temperature and current value earlier, so just can improve the service time of temperature limiter 3 and fuse 8 greatly, has also improved the reliability of heater members work such as electric heating tube simultaneously.
What need indicate is that any alteration of form or parts replacement that does not relate to basic structure and connected mode that the related personnel makes the utility model also belongs to protection range of the present utility model.
Claims (3)
1, the protection control circuit of heater members; form by CPU (1), control loop (2), auxilliary hot loop (9); described auxilliary hot loop (9) is connected with temperature limiter (3), heater members (7) and fuse (8); it is characterized in that: described CPU (1) is connected with DC power supply (5), divider resistance (4) and at least one recoverable PTC (6), and described CPU (1) also is connected with control loop (2) and auxilliary hot loop (9).
2, the protection control circuit of heater members according to claim 1 is characterized in that: described heater members (7) is an electric heating tube.
3, the protection control circuit of heater members according to claim 1 is characterized in that: described heater members (7) is the PTC heater element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520056889 CN2779779Y (en) | 2005-04-06 | 2005-04-06 | Protection control circuit of heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520056889 CN2779779Y (en) | 2005-04-06 | 2005-04-06 | Protection control circuit of heating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2779779Y true CN2779779Y (en) | 2006-05-10 |
Family
ID=36753864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520056889 Expired - Lifetime CN2779779Y (en) | 2005-04-06 | 2005-04-06 | Protection control circuit of heating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2779779Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106871175A (en) * | 2016-12-28 | 2017-06-20 | 广东格兰仕集团有限公司 | A kind of power panel method for excessive heating protection of frequency-conversion microwave oven |
| CN112303818A (en) * | 2020-10-23 | 2021-02-02 | 珠海格力电器股份有限公司 | Defrosting control device and method of air conditioning system and air conditioning system |
-
2005
- 2005-04-06 CN CN 200520056889 patent/CN2779779Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106871175A (en) * | 2016-12-28 | 2017-06-20 | 广东格兰仕集团有限公司 | A kind of power panel method for excessive heating protection of frequency-conversion microwave oven |
| CN112303818A (en) * | 2020-10-23 | 2021-02-02 | 珠海格力电器股份有限公司 | Defrosting control device and method of air conditioning system and air conditioning system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150406 Granted publication date: 20060510 |