CN106627038B - Heater switch circuit - Google Patents
Heater switch circuit Download PDFInfo
- Publication number
- CN106627038B CN106627038B CN201611179012.0A CN201611179012A CN106627038B CN 106627038 B CN106627038 B CN 106627038B CN 201611179012 A CN201611179012 A CN 201611179012A CN 106627038 B CN106627038 B CN 106627038B
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- China
- Prior art keywords
- switching tube
- poles
- connect
- diode
- switch 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
- B60H1/2215—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from electric heaters
- B60H1/2218—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from electric heaters controlling the operation of electric heaters
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Resistance Heating (AREA)
- Control Of Resistance Heating (AREA)
Abstract
The invention discloses a kind of heater switch circuit, including three switching tube Q1, Q2, Q4, two resistance R1, R2, two heating elements A, B；The poles C of the switching tube Q4 and the anode of high-tension battery connect；The poles E of the switching tube Q4 are connect with an electric connecting terminal of an electric connecting terminal of heater element A, heater element B；Another electric connecting terminal of the heater element A is connect with the poles C of switching tube Q1；The poles E of the switching tube Q1 are connect with one end of resistance R1；Another electric connecting terminal of the heater element B is connect with the poles C of switching tube Q2；The poles E of the switching tube Q2 are connect with one end of resistance R2；The cathode of the other end of the resistance R1, the other end of resistance R2 and high-tension battery connects；The poles G of the switching tube Q1, the poles G of switching tube Q2, switching tube Q3 G extremely with control chip connect.The circuit production cost is low and when switching tube failure short circuit for one, and the corresponding heater element of the branch remains able to work normally.
Description
Technical field
It is especially that one kind is filled for controlling air heating the present invention relates to the air heating apparatus used on a kind of automobile
The heater switch circuit set.
Background technology
The heater switch circuit of the prior art as shown in Figure 1, heater switch electric routing switch pipe Q1, Q2, Q3, Q4, Q5,
Q6, heater element A, B, C, resistance R1, R2, R3 are formed by connecting.There are three heater elements for heater switch circuit tool, actual
Also there can be two heater elements in application process.When work, the G for controlling switching tube respectively by microprocessor is extremely controlled
Whether the work of switching tube Q1, Q2, Q3, Q4, Q5, Q6, and then the working condition of heater element A, B, C are controlled.It is above-mentioned
The heater switch circuit of structure has the following disadvantages：When switching tube failure short circuit for one, since there is also another for same branch
A concatenated switching tube, so the corresponding heater element of the branch still can control.But since it uses six switching tubes
Three heater elements (four switching tubes are control two heating elements) are controlled, therefore its production cost is higher.
Invention content
The technical problem to be solved by the present invention is to provide a kind of heater switch circuit, the circuit production cost is low and when one
When a switch tube failure short circuit, the corresponding heater element of the branch remains able to work normally.
The technical scheme is that a kind of heater switch circuit is provided, including three switching tubes Q1, Q2, Q4, two electricity
Hinder R1, R2, two heating elements A, B；The poles C of the switching tube Q4 and the anode of high-tension battery connect；The E of the switching tube Q4
Pole is connect with an electric connecting terminal of an electric connecting terminal of heater element A, heater element B；Another electrical connection of the heater element A
End is connect with the poles C of switching tube Q1；The poles E of the switching tube Q1 are connect with one end of resistance R1；The heater element B's is another
Electric connecting terminal is connect with the poles C of switching tube Q2；The poles E of the switching tube Q2 are connect with one end of resistance R2；The resistance R1's
The cathode of the other end, the other end of resistance R2 and high-tension battery connects；The poles G of the switching tube Q1, are opened at the poles G of switching tube Q2
The G for closing pipe Q3 is extremely connect with control chip.
The heater switch circuit further includes that an induced current for being generated to heater element carries out water conservancy diversion to prevent
The diode D1 of switching tube Q1 damages, the anode of the diode D1 are connect with the poles C of switching tube Q1；The moon of the diode D1
The anode of pole and high-tension battery connects.
The heater switch circuit further includes that an induced current for being generated to heater element carries out water conservancy diversion to prevent
The diode D2 of switching tube Q2 damages, the anode of the diode D2 are connect with the poles C of switching tube Q2；The moon of the diode D2
The anode of pole and high-tension battery connects.
The heater switch circuit further includes one preventing reversal connection high voltage power supply positive and negative anodes to damage the two of switching tube Q1, Q2
The anode of pole pipe D4, the diode D4 and the cathode of high-tension battery connect, the E of the cathode and switching tube Q4 of the diode D4
Pole connects.
After using the above structure, compared with prior art, the present invention haing the following advantages：
Heater switch circuit of the present invention controls the conducting and closing of switching tube Q1, Q2, Q4 by controlling chip, to control
The break-make of two heating elements A, B processed.When switching tube Q4 is damaged, access is formed inside switching tube Q4, at this moment switching tube Q1, Q2
Conducting remains able to control two heating elements A, B conducting.And access is formed when switching tube Q1 is damaged, inside switching tube Q1,
At this moment switching tube Q4 conductings remain able to the A conductings of control heater element.Similarly, it is also such when switching tube Q2 is damaged.Therefore,
When one switch tube failure short circuit of the circuit, the corresponding heater element of the branch remains able to work normally.The prior art
In, four switching tubes are control two heating elements, and in this application, three switching tubes can control two heating elements,
Therefore production cost is reduced compared with the existing technology.For the application, the heater element of control is more, reduces production cost
Effect it is more notable.
Further, the heater switch circuit further includes that an induced current for being generated to heater element is led
Diode D1 of the stream to prevent switching tube Q1 from damaging, the anode of the diode D1 are connect with the poles C of switching tube Q1；Two pole
The cathode of pipe D1 and the anode of high-tension battery connect.The induced electricity conductance that the setting of diode D1 can generate heater element
Go out, to prevent damage switching tube Q1, and then ensure that the functional reliability of the application heater switch circuit.
Further, the heater switch circuit further includes that an induced current for being generated to heater element is led
Diode D2 of the stream to prevent switching tube Q2 from damaging, the anode of the diode D2 are connect with the poles C of switching tube Q2；Two pole
The cathode of pipe D2 and the anode of high-tension battery connect.The induced electricity conductance that the setting of diode D2 can generate heater element
Go out, to prevent damage switching tube Q2, and then ensure that the functional reliability of the application heater switch circuit.
Further, the heater switch circuit further includes one preventing reversal connection high voltage power supply positive and negative anodes to damage switching tube
The cathode of the anode of the diode D4, the diode D4 of Q1, Q2 and high-tension battery connects, the cathode of the diode D4 with open
Close the poles the E connection of pipe Q4.Electric current can be led back to high voltage power supply when high voltage power supply positive and negative anodes are reversed and born by the setting of diode D4
Pole to prevent damage switching tube, and then improves the functional reliability of the application heater switch circuit.
Description of the drawings
Fig. 1 is the circuit diagram of prior art heater switch circuit.
Fig. 2 is the circuit diagram of heater switch circuit embodiments 1 of the present invention.
Fig. 3 is the circuit diagram of heater switch circuit embodiments 2 of the present invention.
Fig. 4 is the circuit diagram of heater switch circuit embodiments 3 of the present invention.
Specific implementation mode
The invention will be further described in the following with reference to the drawings and specific embodiments.
As shown in Fig. 2, a kind of heater switch circuit of the present invention, including three switching tube Q1, Q2, Q4, two resistance R1,
R2, two heating elements A, B, heater element A, B are generally PTC, resistance wire etc., and switching tube is IGBT or is MOSFET；Institute
The anode of the poles C and high-tension battery of stating switching tube Q4 connects；The poles E of the switching tube Q4 and an electric connecting terminal of heater element A,
An electric connecting terminal of heater element B connects；Another electric connecting terminal of the heater element A is connect with the poles C of switching tube Q1；It is described
The poles E of switching tube Q1 are connect with one end of resistance R1；Another electric connecting terminal of the heater element B connects with the poles C of switching tube Q2
It connects；The poles E of the switching tube Q2 are connect with one end of resistance R2；The other end of the resistance R1, the other end of resistance R2 and height
The cathode of piezoelectric battery connects；The poles G of the switching tube Q1, the poles G of switching tube Q2, switching tube Q3 G extremely with control chip connect
It connects.In this application, control chip is generally microprocessor.In the present embodiment, a heater element C can also be added again, together
Shi Zengjia resistance R3, switching tube Q3.Control can be realized by four switching tubes in this way, it is specific as shown in Figure 4.DC+、
DC- connects high-tension battery.
It is carried out as shown in figure 3, the heater switch circuit further includes an induced current for being generated to heater element
Diode D1 of the water conservancy diversion to prevent switching tube Q1 from damaging, the anode of the diode D1 are connect with the poles C of switching tube Q1；Described two
The cathode of pole pipe D1 and the anode of high-tension battery connect.
The heater switch circuit further includes that an induced current for being generated to heater element carries out water conservancy diversion to prevent
The diode D2 of switching tube Q2 damages, the anode of the diode D2 are connect with the poles C of switching tube Q2；The moon of the diode D2
The anode of pole and high-tension battery connects.
The heater switch circuit further includes one preventing reversal connection high voltage power supply positive and negative anodes to damage the two of switching tube Q1, Q2
The anode of pole pipe D4, the diode D4 and the cathode of high-tension battery connect, the E of the cathode and switching tube Q4 of the diode D4
Pole connects.
Only highly preferred embodiment of the present invention is described above, but is not to be construed as limiting the scope of the invention.This
Invention is not limited only to above example, and concrete structure is allowed to vary.In every case in the protection model of independent claims of the present invention
Various change is within the scope of the invention made by enclosing.
Claims (4)
1. a kind of heater switch circuit, including three switching tube Q1, Q2, Q4, two resistance R1, R2, two heating elements A, B；
It is characterized in that：The poles C of the switching tube Q4 and the anode of high-tension battery connect；The poles E of the switching tube Q4 and heater element A
An electric connecting terminal, heater element B an electric connecting terminal connection；Another electric connecting terminal of the heater element A and switching tube Q1
The poles C connection；The poles E of the switching tube Q1 are connect with one end of resistance R1；Another electric connecting terminal of the heater element B with open
Close the poles the C connection of pipe Q2；The poles E of the switching tube Q2 are connect with one end of resistance R2；The other end, the resistance R2 of the resistance R1
The other end and high-tension battery cathode connect；The poles G of the switching tube Q1, the poles G of switching tube Q2, the G of switching tube Q3 are extremely equal
It is connect with control chip.
2. heater switch circuit according to claim 1, it is characterised in that：The heater switch circuit further includes a use
The diode D1 for carrying out water conservancy diversion in the induced current generated to heater element to prevent switching tube Q1 from damaging, the diode D1's
Anode is connect with the poles C of switching tube Q1；The cathode of the diode D1 and the anode of high-tension battery connect.
3. heater switch circuit according to claim 1, it is characterised in that：The heater switch circuit further includes a use
The diode D2 for carrying out water conservancy diversion in the induced current generated to heater element to prevent switching tube Q2 from damaging, the diode D2's
Anode is connect with the poles C of switching tube Q2；The cathode of the diode D2 and the anode of high-tension battery connect.
4. heater switch circuit according to claim 1, it is characterised in that：The heater switch circuit further includes one anti-
Only reversal connection high voltage power supply positive and negative anodes are to damage the diode D4 of switching tube Q1, Q2, the anode and high-tension battery of the diode D4
Cathode connection, the cathode of the diode D4 connect with the poles E of switching tube Q4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611179012.0A CN106627038B (en) | 2016-12-19 | 2016-12-19 | Heater switch circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611179012.0A CN106627038B (en) | 2016-12-19 | 2016-12-19 | Heater switch circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106627038A CN106627038A (en) | 2017-05-10 |
| CN106627038B true CN106627038B (en) | 2018-10-12 |
Family
ID=58833680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611179012.0A Active CN106627038B (en) | 2016-12-19 | 2016-12-19 | Heater switch circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106627038B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109246859B (en) * | 2018-06-22 | 2021-01-22 | 杭州先途电子有限公司 | Heating control method and device |
| CN110907858B (en) * | 2018-09-14 | 2022-03-15 | 杭州先途电子有限公司 | Fault detection method of heating switch circuit and electric heater |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3985365B2 (en) * | 1997-12-25 | 2007-10-03 | 株式会社デンソー | Air conditioner for vehicles |
| CN201405970Y (en) * | 2009-05-27 | 2010-02-17 | 陈志飞 | Vehicle-mounted intelligent electric heating device |
| CN201925975U (en) * | 2011-01-28 | 2011-08-10 | 宁波方太厨具有限公司 | High-reliability control circuit for microwave oven |
| CN202634263U (en) * | 2012-04-25 | 2012-12-26 | 宁波中荣声学科技有限公司 | Protection circuit of switching power supply |
| CN202839463U (en) * | 2012-08-23 | 2013-03-27 | 美的集团股份有限公司 | Relay control circuit and electric cooker |
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2016
- 2016-12-19 CN CN201611179012.0A patent/CN106627038B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106627038A (en) | 2017-05-10 |
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