CN109219163B - Control system of automobile heating device - Google Patents
Control system of automobile heating device Download PDFInfo
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- CN109219163B CN109219163B CN201811215864.XA CN201811215864A CN109219163B CN 109219163 B CN109219163 B CN 109219163B CN 201811215864 A CN201811215864 A CN 201811215864A CN 109219163 B CN109219163 B CN 109219163B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 25
- 239000003381 stabilizer Substances 0.000 claims description 4
- 230000007547 defect Effects 0.000 abstract description 3
- 238000002955 isolation Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0227—Applications
- H05B1/023—Industrial applications
- H05B1/0236—Industrial applications for vehicles
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- Air-Conditioning For Vehicles (AREA)
Abstract
The invention relates to a control system of an automobile heating device, which comprises a PTC controller, wherein a high-voltage input end of the PTC controller is connected with a high-voltage positive electrode, a high-voltage output end of the PTC controller is connected with a PTC high-voltage positive electrode interface, a low-voltage end of a power supply of the PTC controller is connected with a PTC high-voltage negative electrode interface, and the PTC high-voltage negative electrode interface is connected with a high-voltage negative electrode; the PTC controller is provided with a low-voltage control end, and the low-voltage control end of the PTC controller inputs a PWM signal to control the power-on work of the PTC through the PTC controller. The invention has the advantages that: the PWM signal duty ratio of the PTC controller is adjusted through P, the heating quantity is flexibly adjusted, the PTC controller is convenient for users to flexibly adjust, the PTC controller can be quickly switched, the PTC is controlled to be opened and closed more quickly, and the PTC controller is suitable for frequent opening and closing and cannot have the defect that a relay is frequently opened and damaged.
Description
Technical Field
The invention relates to the technical field of automobile air conditioners, in particular to a control system of an automobile heating device.
Background
With the implementation of national energy-saving emission-reduction policy, new energy vehicles become the leading soldiers in response to national energy-saving emission-reduction strategies. The vehicle air conditioner can effectively improve the driving comfort and is an important assistance force which can be popularized by new energy vehicles.
In new energy vehicles, especially pure electric vehicles, there is a special optimization demand for the consumption of vehicle energy. In the aspect of traditional vehicle air conditioner control, a PTC (positive temperature coefficient) component for heating of an air conditioning system is simple on-off control, so that certain waste exists in energy consumption, and discomfort of a user is caused due to the fact that the PTC (positive temperature coefficient) component is excessive. Generally, a relay is used for control, but the PTC relay is limited by a PTC relay control mode, so that the heating quantity of the PTC cannot be adjusted, and the problems of energy waste and poor user experience exist.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a control system of an automobile heating device, which can control the operation of a PTC (positive temperature coefficient) to realize quick closing and more flexible adjustment.
In order to achieve the purpose, the invention adopts the technical scheme that: a control system of an automobile heating device comprises a PTC controller, wherein a high-voltage input end of the PTC controller is connected with a high-voltage positive electrode, a high-voltage output end of the PTC controller is connected with a PTC high-voltage positive electrode interface, a low-voltage end of a power supply of the PTC controller is connected with a PTC high-voltage negative electrode interface, and the PTC high-voltage negative electrode interface is connected with a high-voltage negative electrode; the PTC controller is provided with a low-voltage control end, and the low-voltage control end of the PTC controller inputs a PWM signal to control the power-on work of the PTC through the PTC controller.
The PTC controller comprises a high-voltage input end and a low-voltage control end, wherein the high-voltage input end is connected with a high-voltage anode of a power supply, the high-voltage input end is connected with a collector of an MOS tube Q1, an emitter of the MOS tube Q1 is connected with a primary side of a transformer after passing through a power supply control chip, a PWM (pulse-width modulation) control signal is input into the low-voltage control end, the low-voltage control end is connected with a base of an MOS tube Q2, an emitter of an MOS tube Q2 is connected with a base of an MOS tube Q1, a conduction voltage is provided for an MOS tube Q2 through the PWM control signal, and a conduction voltage; the secondary side of the transformer is connected with the base of a transistor Q3, the emitter and the collector of a transistor Q3 are respectively connected with a high-voltage output end and a low-voltage end of a power supply, the base of a transistor Q3 is respectively connected with the bases of Q4 and Q5, the collectors of transistors Q3, Q4 and Q5 are mutually connected, and the emitters of transistors Q3, Q4 and Q5 are mutually connected.
The high-voltage input end is grounded through the surge-proof TVS.
An anti-reverse diode is connected between the high-voltage input end and the diode Q1 in series.
And a three-terminal regulator is connected in series between the diode Q1 and the power control chip.
The secondary side of the transformer is connected with the base electrode of the MOS tube Q3 after passing through the rectifying circuit, the rectifying circuit comprises diodes D2 and D3, the anodes of the diodes D2 and D3 are respectively connected with the two ends of the secondary side of the transformer, and the cathodes of the diodes D2 and D3 are connected with each other and then connected with the base electrode of the MOS tube Q3.
When the PWM control signal input by the low-voltage control end is at a high level, the MOS tubes Q2 and Q1 are conducted, the input voltage of the high-voltage input end is connected to the input end of the three-terminal regulator, the output end of the three-terminal regulator outputs +5V voltage to the power supply control chip, the power supply control chip works, the output voltage signal is rectified by the isolating transformer through the D1 and the D2 and is output to the bases of Q3, Q4 and Q5, the MOS tubes Q3, Q4 and Q5 are conducted, and the PTC is electrified to work.
The invention has the advantages that: the PWM signal duty ratio of the PTC controller is adjusted through P, the heating quantity is flexibly adjusted, the PTC controller is convenient for users to flexibly adjust, the PTC controller can be quickly switched, the PTC is controlled to be opened and closed more quickly, and the PTC controller is suitable for frequent opening and closing and cannot have the defect that a relay is frequently opened and damaged.
Drawings
The contents of the expressions in the various figures of the present specification and the labels in the figures are briefly described as follows:
FIG. 1 is a schematic diagram of a control method of a relay according to the prior art;
FIG. 2 is a schematic diagram of the present invention controlled by a PTC controller;
fig. 3 is a schematic diagram of a PTC controller according to the present invention.
The labels in the above figures are: 1. a high-voltage positive electrode; 2. a high voltage negative electrode; 3. a PTC high-voltage positive electrode interface; 4. a PTC high voltage negative interface; 5. a low-voltage control terminal; 6. a low voltage power line; 7. a PTC controller; 8. a PTC controller high voltage input; 9. a PTC controller high voltage output terminal; 10. the TVS is used for preventing surge; 11. an anti-reverse diode; 12. three sections of voltage regulators; 13. an isolation transformer.
Detailed Description
The following description of preferred embodiments of the invention will be made in further detail with reference to the accompanying drawings.
At present, a device for controlling the opening and closing of the PTC is a relay, and because the relay cannot be rapidly switched to be in a closed state and the relay mainly plays a role in switching, when the relay is used, the relay is controlled to be attracted to enable the PTC to start working. If the driver and the passenger have the heating requirement, natural wind and indoor wind enter the interior of the HVAC through the blower. The AC air conditioner compressor system is not started, air passes through the condenser and is not subjected to refrigeration treatment, and meanwhile, the PTC is started to heat the flowing air volume, so that a user feels hot air; as shown in fig. 1, which is a relay control principle in the prior art, a high-voltage positive electrode is connected with a PTC high-voltage positive electrode interface through a relay, the PTC high-voltage negative electrode interface is connected with a high-voltage negative electrode, a control end LV-control of the relay is used for inputting a control signal, and the control end LV-control and the LV-power are electrified through the control signal, so that the relay is attracted, and a high-voltage loop is conducted. Because the switching frequency of the relay cannot be too high (the frequency of closing and opening is about second), and when the relay acts, the sound is large, the relay is not suitable for frequent opening and closing, and the relay is easy to damage when the relay is frequently opened and closed; based on the function optimization design, the device for accurately controlling the PTC heating amount is designed, the energy consumption of the whole vehicle is saved, and the user experience is improved.
As shown in fig. 2, a control system of an automobile heating device comprises a PTC controller, a high-voltage input end of the PTC controller is connected with a high-voltage positive electrode, a high-voltage output end of the PTC controller is connected with a PTC high-voltage positive electrode interface, a low-voltage end of a power supply of the PTC controller is connected with a PTC high-voltage negative electrode interface, and the PTC high-voltage negative electrode interface is connected with a high-voltage negative electrode; the PTC controller is provided with a low-voltage control end, and the low-voltage control end of the PTC controller inputs a PWM signal to control the power-on work of the PTC through the PTC controller. The PTC controller is controlled to be electrified to work, different duty ratios are input by adopting PWM duty ratio adjustment, the work of the PTC controller is rapidly controlled, the work of the PTC is further controlled, the adjustment can be rapidly realized, and the adjustment requirement of a user is met.
One implementation mode of PTC control is including high-voltage input end, low pressure control end, and the high-voltage input end is connected the positive pole of power high pressure, and the high-voltage input end is through preventing surge TVS ground connection, and the high-voltage input end is connected MOS pipe Q1's collecting electrode behind anti-diode D1, and diode D1's positive pole is towards the high-voltage input end. A filter circuit is arranged between the cathode of the diode and the collector of the MOS transistor Q1, the emitter of the MOS transistor Q1 is connected with the input end of the three-stage voltage stabilizer, the base of the MOS transistor Q1 is connected with the emitter of the MOS transistor Q2, the collector of the MOS transistor Q2 is grounded, and the base of the MOS transistor Q2 is a low-voltage control end controlled by PTC and used for inputting PWM control signals. The conduction of the Q1 is controlled through the PWM control signal, and the conduction of the Q2 is further controlled; the output end of the three-terminal voltage stabilizer is connected with a VCC port of a power control chip, +5V voltage is input into the VCC port, pins D1 and D2 of the power control chip are respectively connected with two input ends of an isolation transformer, the output end of the isolation transformer is input into a base electrode of a triode Q3 after being rectified by diodes D2 and D3, a collector of an MOS tube Q3 is connected with a high-voltage positive interface of a PTC, and an emitter of an MOS tube Q3 is connected with a high-voltage negative interface of the PTC. The base of the MOS tube Q3 is connected with the bases of the MOS tubes Q4 and Q5, the emitter of the MOS tube Q3 is connected with the emitters of the MOS tubes Q4 and Q5, the collector of the MOS tube Q3 is connected with the collectors of the MOS tubes Q4 and Q5,
the working principle is as follows: after the vehicle high-voltage system is ready, the high-voltage anode and the high-voltage cathode are ready for power supply; the PTC high-voltage negative electrode interface is communicated with the high-voltage negative electrode; after the air conditioning system is ready, the low voltage power line (PTC controller) is ready; when a user has a heating demand, a low-voltage control line (PTC controller) gives a low-level control signal with a certain duty ratio; the control signal can be sent out by a control switch arranged in the vehicle through an air conditioner controller; when the low-voltage control line (PTC controller) 5 gives a high-level control signal, the PTC controller 8 is turned on; when the PTC controller 8 is switched on, the PTC high-voltage positive electrode interface 3 is switched on with the high-voltage positive electrode 1; after the PTC high-voltage positive electrode interface 3 and the PTC high-voltage negative electrode interface 4 are respectively communicated with the high-voltage positive electrode 1 and the high-voltage negative electrode 2, the PTC starts to work and generate heat;
the PTC controller is in an OFF state (namely a high-voltage input end is not electrified), an EXT _ PWM signal is in a low level, Q2 is cut OFF, so that Q1 is cut OFF, KL30 voltage cannot be connected to the input end of the three-terminal regulator U1(13), a power supply control chip U2 does not work, and +5V _ ISO is 0, namely gate driving voltages of MOS tubes Q3, Q4 and Q5 are 0, so that the power supply control chip is in a cut-OFF state, HV + is cut OFF at drains of the MOS tubes Q3, Q4 and Q5, PTC is not electrified, and the static current of the controller is less than 1 mA;
the PTC controller is in an ON gear (namely the high-voltage input end is electrified), and if the PTC heating function is not started, the state is the same as that of an OFF gear; the PTC controller is turned ON, a PTC heating function is started, when an EXT _ PWM signal (5) is at a high level, Q2 is conducted, Q1 is conducted, KL30 voltage is connected to the input end of a three-terminal regulator U1(13), the U1(13) outputs +5V voltage, a power supply control chip U2 works, T1 is an isolation transformer, a secondary side of the isolation transformer outputs isolation +5V _ ISO after being rectified by D2 and D3, MOS (metal oxide semiconductor) tubes Q3, Q4 and Q5 are driven to be turned ON, HV + voltage is added to PTC, and the PTC works and heats; when EXT _ PWM is at low level, PTC does not perform heating work;
the PTC controller can control the PTC to work intermittently and control the working temperature of the PTC; when a user needs to heat, the heating quantity of the PTC is flexibly adjusted through the intermittent working duty ratio of the PTC; different input PWM signals control the operation switching of the PTC differently. The PTC heating amount is controlled through the PWM signal with the duty ratio adjusted, flexible adjustment can be achieved, an energy-saving effect can be achieved, and a user can flexibly adjust the temperature; the use of the PTC controller can effectively increase the endurance mileage of the electric vehicle in winter and improve the comfort of users.
It is clear that the specific implementation of the invention is not restricted to the above-described embodiments, but that various insubstantial modifications of the inventive process concept and technical solutions are within the scope of protection of the invention.
Claims (6)
1. A control system for a vehicle heating apparatus, characterized by: the high-voltage power supply comprises a PTC controller, wherein a high-voltage input end of the PTC controller is connected with a high-voltage positive electrode, a high-voltage output end of the PTC controller is connected with a PTC high-voltage positive electrode interface, a low-voltage end of a power supply of the PTC controller is connected with a high-voltage negative electrode interface of the PTC, and the PTC high-voltage negative electrode interface is connected with a high-voltage negative electrode; the PTC controller is provided with a low-voltage control end, and the low-voltage control end of the PTC controller inputs a PWM signal to control the power-on work of the PTC through the PTC controller;
the PTC controller comprises a high-voltage input end and a low-voltage control end, wherein the high-voltage input end is connected with a high-voltage anode of a power supply, the high-voltage input end is connected with a collector of an MOS tube Q1, an emitter of the MOS tube Q1 is connected with a primary side of a transformer after passing through a power supply control chip, a PWM (pulse-width modulation) control signal is input into the low-voltage control end, the low-voltage control end is connected with a base of an MOS tube Q2, an emitter of an MOS tube Q2 is connected with a base of an MOS tube Q1, a conduction voltage is provided for an MOS tube Q2 through the PWM control signal, and a conduction voltage; the secondary side of the transformer is connected with the base of a transistor Q3, the emitter and the collector of a transistor Q3 are respectively connected with a high-voltage output end and a low-voltage end of a power supply, the base of a transistor Q3 is respectively connected with the bases of Q4 and Q5, the collectors of transistors Q3, Q4 and Q5 are mutually connected, and the emitters of transistors Q3, Q4 and Q5 are mutually connected.
2. A control system for a heating apparatus of an automobile according to claim 1, characterized in that: the high-voltage input end is grounded through the surge-proof TVS.
3. A control system for a heating apparatus of an automobile according to claim 1, characterized in that: an anti-reverse diode is connected between the high-voltage input end and the MOS tube Q1 in series.
4. A control system for a heating apparatus of an automobile according to claim 1, characterized in that: and a three-terminal regulator is connected in series between the MOS tube Q1 and the power control chip.
5. A control system for a heating apparatus of an automobile according to claim 1, characterized in that: the secondary side of the transformer is connected with the base electrode of the MOS tube Q3 after passing through the rectifying circuit, the rectifying circuit comprises diodes D2 and D3, the anodes of the diodes D2 and D3 are respectively connected with the two ends of the secondary side of the transformer, and the cathodes of the diodes D2 and D3 are connected with each other and then connected with the base electrode of the MOS tube Q3.
6. A control system for a heating apparatus of an automobile according to any one of claims 1 to 5, characterized in that: when the PWM control signal input by the low-voltage control end is at a high level, the MOS tubes Q2 and Q1 are conducted, the input voltage of the high-voltage input end is connected to the input end of the three-terminal voltage stabilizer, the output end of the three-terminal voltage stabilizer outputs +5V voltage to the power supply control chip, the power supply control chip works, the output voltage signal is rectified by the isolating transformer through the D1 and the D2 and then is output to the bases of Q3, Q4 and Q5, the MOS tubes Q3, Q4 and Q5 are conducted, and the PTC is electrified and works.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811215864.XA CN109219163B (en) | 2018-10-18 | 2018-10-18 | Control system of automobile heating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811215864.XA CN109219163B (en) | 2018-10-18 | 2018-10-18 | Control system of automobile heating device |
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| CN109219163A CN109219163A (en) | 2019-01-15 |
| CN109219163B true CN109219163B (en) | 2021-03-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109649123A (en) * | 2018-12-29 | 2019-04-19 | 奇瑞新能源汽车技术有限公司 | The control device of electric vehicle heating combined equipment |
| CN112822796A (en) * | 2020-12-31 | 2021-05-18 | 江西江铃集团新能源汽车有限公司 | PTC device control circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4784633B2 (en) * | 2008-10-15 | 2011-10-05 | 三菱自動車工業株式会社 | Air conditioner for electric vehicle and control method for air conditioner |
| FR2967093B1 (en) * | 2010-11-09 | 2012-11-16 | Valeo Systemes Thermiques | DEVICE AND METHOD FOR CONTROLLING AN ELECTRICAL RADIATOR OF A VENTILATION, HEATING AND / OR AUTOMOTIVE AIR CONDITIONING SYSTEM |
| FR2984471B1 (en) * | 2011-12-15 | 2013-11-29 | Valeo Systemes Thermiques | DEVICE FOR THERMALLY CONDITIONING A TRACTION CHAIN AND A VEHICLE HABITACLE |
| KR101518924B1 (en) * | 2013-12-10 | 2015-05-11 | 현대자동차 주식회사 | Heater control system for environmental friendly vehicle and method thereof |
| CN104648077B (en) * | 2014-02-28 | 2017-03-22 | 柳州易舟汽车空调有限公司 | Controlling method of controller of vehicle air conditioner |
| CN105252994B (en) * | 2014-07-10 | 2017-11-17 | 重庆长安铃木汽车有限公司 | A kind of electric car PTC heating systems and its method for diagnosing faults |
| JP6496958B2 (en) * | 2014-09-19 | 2019-04-10 | サンデンホールディングス株式会社 | Air conditioner for vehicles |
| KR102226552B1 (en) * | 2015-07-03 | 2021-03-12 | 현대자동차주식회사 | Safety control method for a radiation heater for a vehicle |
| CN207853794U (en) * | 2018-02-12 | 2018-09-11 | 中山市嘉科电子有限公司 | A kind of super bath ceiling appliance control circuit |
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Address after: 241000 No. 226 Jin Hua Nan Road, Yijiang hi tech Industrial Development Zone, Anhui, Wuhu Applicant after: Chery New Energy Automobile Co.,Ltd. Address before: 241000 No. 226 Jin Hua Nan Road, Yijiang hi tech Industrial Development Zone, Anhui, Wuhu Applicant before: CHERY NEW ENERGY AUTOMOBILE TECHNOLOGY Co.,Ltd. |
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