CN102889229A - Automobile cooling fan control circuit - Google Patents
Automobile cooling fan control circuit Download PDFInfo
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- CN102889229A CN102889229A CN2012104272561A CN201210427256A CN102889229A CN 102889229 A CN102889229 A CN 102889229A CN 2012104272561 A CN2012104272561 A CN 2012104272561A CN 201210427256 A CN201210427256 A CN 201210427256A CN 102889229 A CN102889229 A CN 102889229A
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- Air-Conditioning For Vehicles (AREA)
Abstract
The invention relates to an automobile cooling fan control circuit. The circuit comprises an ignition switch, an air-conditioning switch, a voltage switch, an evaporator temperature switch, a compressor electromagnetic clutch, a storage battery, a five-terminal relay, a first fan motor, a second fan motor, a water temperature sensor, a normally open relay, a medium-voltage switch and a fan control unit. The circuit has the following advantages that series and parallel connections of fans are controlled by the water temperature sensor, the medium-voltage switch, the five-terminal relay, the normally open relay and the fan control unit, when the fans are connected in series, the rotating speed is low, and when the fans are connected in parallel, the rotating speed is high, thus meeting the radiation requirements of automobiles under different conditions so as to ensure that the automobile engines and the air conditioners are in the optimal working conditions.
Description
Technical field
The present invention relates to a kind of automobile cooling fan control circuit, especially a kind of based on monolithic processor controlled automobile cooling fan control circuit.
Background technique
On automobile, radiator of car engine and air-conditioning condenser are installed together, and the cooling fan of radiator of car engine and air-conditioning condenser shares, and this just requires cooling fan must satisfy the common requirement of the gentle car air conditioner of engine water.Low, the weak effect of existing cooling fan control circuit precision causes that engine operation efficient is low, less economical, the air conditioner refrigerating hydraulic performance decline, is not suitable with the development of Hyundai Motor technology.
Summary of the invention
For above-mentioned prior art, technical problem to be solved by this invention is the automobile cooling fan control circuit that provides a kind of co-operation that can make automobile cooling fan can satisfy motor and air-conditioning to require.
For solving the problems of the technologies described above, technological scheme of the present invention is: a kind of automobile cooling fan control circuit comprises ignition switch, air-conditioning switch, pressure switch, evaporator temperature switch, electromagnetic clutch for compressor, storage battery, Five-terminals relay, the first fan electromotor, the second fan electromotor, cooling-water temperature sensor, normally opened relay, Medium voltage switch or circuit breaker, fan control unit; Wherein, described fan control unit comprises power end, two signal output parts, three signal input parts; The positive pole of described storage battery is connected the control circuit of input end, normally opened relay with the control circuit of the power end of described fan control unit, Five-terminals relay respectively and is connected input end with working circuit and is connected with working circuit; Simultaneously, the positive pole of described storage battery is connected successively and is connected respectively the first signal input end of described fan control unit and the power end of electromagnetic clutch for compressor behind described ignition switch, air-conditioning switch, pressure switch, the evaporator temperature switch; The output terminal of the control circuit of described Five-terminals relay connects the first signal output terminal of fan control unit, and the output terminal of its working circuit is connected in series described the first fan electromotor and the second fan electromotor successively; The output terminal of the control circuit of described normally opened relay connects the secondary signal output terminal of fan control unit, and the output terminal of its working circuit connects the power end of the second fan electromotor; Described cooling-water temperature sensor connects the secondary signal input end of fan control unit; Described Medium voltage switch or circuit breaker connects the 3rd signal input part of fan control unit.
As improvement of the present invention, described pressure switch is double pressure switch, and its lower limit switching value is 0.2MPa, and upper limit switching value is 3MPa.
As a further improvement on the present invention, described fan control unit is single-chip microcomputer.
Major advantage of the present invention is to have increased the fan control unit that can regulate cooling fan rotation speed and coupled Five-terminals relay, normally opened relay, Medium voltage switch or circuit breaker and cooling-water temperature sensor at former cooling fan control circuit.Reach and to control the rotating speed of cooling fan according to the water temperature of motor and the working state of air-conditioning, satisfy the heat radiation needs of motor and air-conditioning under the different situations, so that motor car engine and air-conditioning are in best working state.Circuit is simple, and it is convenient to realize, reliability is high.
Description of drawings
Fig. 1 is a kind of automobile cooling fan control circuit figure.
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail.
As described in Figure 1, a kind of automobile cooling fan control circuit comprises ignition switch 1, air-conditioning switch 2, pressure switch 3, evaporator temperature switch 4, electromagnetic clutch for compressor 5, storage battery 6, Five-terminals relay 7, the first fan electromotor 8, the second fan electromotor 9, cooling-water temperature sensor 10, normally opened relay 11, Medium voltage switch or circuit breaker 12, fan control unit.Wherein, fan control unit comprises power end, two signal output parts, three signal input parts.The positive pole of storage battery 6 is connected the control circuit of input end, normally opened relay 11 with the control circuit of the power end of fan control unit, Five-terminals relay 7 respectively and is connected input end with working circuit and is connected with working circuit.Simultaneously, connect successively ignition switch 1, air-conditioning switch 2, pressure switch 3, the evaporator temperature switch 4 rear first signal input end of fan control unit and the power ends of electromagnetic clutch for compressor 5 of connecting respectively of the positive pole of storage battery 6.The output terminal of the control circuit of Five-terminals relay 7 connects the first signal output terminal of fan control unit, and the output terminal of its working circuit is connected in series the first fan electromotor 8 and the second fan electromotor 9 successively.The output terminal of the control circuit of normally opened relay 11 connects the secondary signal output terminal of fan control unit, and the output terminal of its working circuit connects the power end of the second fan electromotor 9.Cooling-water temperature sensor 10 connects the secondary signal input end of fan control unit.Medium voltage switch or circuit breaker 12 connects the 3rd signal input part of fan control unit.Wherein, pressure switch 3 is double pressure switch, and its lower limit switching value is 0.2MPa, and upper limit switching value is 3MPa.Fan control unit is single-chip microcomputer.
In circuit of the present invention, pressure switch 3, Medium voltage switch or circuit breaker 12 all are installed on the pressure duct of automobile air conditioning system.Pressure switch 3 is double pressure switch, and switch is closed when system pressure is higher than 0.2MPa and is lower than 3MPa, otherwise pressure switch 3 disconnects, and its effect is to prevent refrigeration system overpressure or excessively low, plays the safety protection effect.Medium voltage switch or circuit breaker 12 is closed when system pressure is higher than 2.2MPa, and Medium voltage switch or circuit breaker 12 disconnects when being lower than 2.2MPa.Cooling-water temperature sensor 10 is installed on the engine cylinder cover outlet pipe, detects the water temperature of motor and it is become electrical signal to flow to fan control unit.Evaporator temperature switch 4 is installed near the vaporizer, and is closed more than 0 ℃, disconnects below 0 ℃, and its effect is that the device surface that avoids evaporating freezes.
When engine water temperature is lower than 95 ℃, air-conditioning switch 2 and disconnects, fan control unit is not controlled the coil terminals bonding of Five-terminals relay 7 and normally opened relay 11, the equal access failure of power circuit of the first fan electromotor 8, the second fan electromotor 9, two fans are not worked.
Automobile cooling fan control circuit specific works situation is as follows in the present embodiment: when engine water temperature is lower than 95 ℃, ignition switch 1 closure, air-conditioning switch 2 when closed, such as pressure switch 3, evaporator temperature switch 4 closure that satisfies condition, then electromagnetic clutch for compressor 5 adhesives, compressor operating; Simultaneously, fan control unit receives the air-conditioning start signal.If refrigeration system pressure is lower than 2.2MPa, then Medium voltage switch or circuit breaker 12 disconnects, the working circuit switch on of fan control unit control Five-terminals relay 7, and working circuit forms the loop, connect the series-connection power supplies circuit of the first fan electromotor 8, the second fan electromotor 9, two fans series connection slow-speed of revolution work; If refrigeration system pressure is higher than 2.2Mpa, Medium voltage switch or circuit breaker 12 closures then, fan control unit receives the input signal of Medium voltage switch or circuit breaker 12, the working circuit switch on of fan control unit control normally opened relay 11, working circuit forms the loop, connects the parallel connection power supply circuit of the first fan electromotor 8, the second fan electromotor 9, cuts off simultaneously the working circuit switch of Five-terminals relay 7, working circuit disconnects, two fans high rotary speed working in parallel.
When engine water temperature is higher than 95 ℃ and when being lower than 105 ℃, air-conditioning switch 2 and disconnecting, the fan control unit root
According to the coil terminals bonding of water temperature signal control Five-terminals relay 7, connect the series-connection power supplies circuit of the first fan electromotor 8, the second fan electromotor 9, two fans series connection slow-speed of revolution work.
When engine water temperature is higher than 95 ℃ and be lower than 105 ℃, ignition switch 2 closures, air-conditioning switch 3 when closed, if refrigeration system pressure is lower than 2.2MPa, then Medium voltage switch or circuit breaker 12 disconnects, fan control unit is according to the working circuit switch on of water temperature signal and air-conditioning start signal control Five-terminals relay 7, working circuit forms the loop, connect the series-connection power supplies circuit of the first fan electromotor 8, the second fan electromotor 9, two fans series connection slow-speed of revolution work; If refrigeration system pressure is higher than 2.2MPa, Medium voltage switch or circuit breaker 12 closures then, fan control unit receives the input signal of Medium voltage switch or circuit breaker 12, the working circuit switch on of fan control unit control normally opened relay 11, working circuit forms the loop, connects the parallel connection power supply circuit of the first fan electromotor 8, the second fan electromotor 9, cuts off simultaneously the working circuit switch of Five-terminals relay 7, working circuit disconnects, two fans high rotary speed working in parallel.
When engine water temperature is higher than 105 ℃, no matter air-conditioning switch 3 closed or disconnections, fan control unit is all controlled the working circuit switch on of normally opened relay 11 according to water temperature signal, working circuit forms the loop, connect the parallel connection power supply circuit of the first fan electromotor 8, the second fan electromotor 9, cut off simultaneously the working circuit switch on of Five-terminals relay 7, working circuit forms the loop, two fans high rotary speed working in parallel.
The above has done detailed description to embodiments of the present invention by reference to the accompanying drawings, but the present invention is not limited to above-mentioned mode of execution, in the ken that those of ordinary skills possess, can also not break away under the prerequisite of aim of the present invention and make various variations.
Claims (3)
1. automobile cooling fan control circuit, it is characterized in that: this circuit comprises ignition switch (1), air-conditioning switch (2), pressure switch (3), evaporator temperature switch (4), electromagnetic clutch for compressor (5), storage battery (6), Five-terminals relay (7), the first fan electromotor (8), the second fan electromotor (9), cooling-water temperature sensor (10), normally opened relay (11), Medium voltage switch or circuit breaker (12), fan control unit; Wherein, described fan control unit comprises power end, two signal output parts, three signal input parts; The positive pole of described storage battery (6) is connected the control circuit of input end, normally opened relay (11) with the control circuit of the power end of described fan control unit, Five-terminals relay (7) respectively and is connected input end with working circuit and is connected with working circuit; Simultaneously, the positive pole of described storage battery (6) is connected successively and is connected respectively the first signal input end of described fan control unit and the power end of electromagnetic clutch for compressor (5) behind described ignition switch (1), air-conditioning switch (2), pressure switch (3), the evaporator temperature switch (4); The output terminal of the control circuit of described Five-terminals relay (7) connects the first signal output terminal of fan control unit, and the output terminal of its working circuit is connected in series described the first fan electromotor (8) and the second fan electromotor (9) successively; The output terminal of the control circuit of described normally opened relay (11) connects the secondary signal output terminal of fan control unit, and the output terminal of its working circuit connects the power end of the second fan electromotor (9); Described temperature sensor (10) connects the secondary signal input end of fan control unit; Described Medium voltage switch or circuit breaker (12) connects the 3rd signal input part of fan control unit.
2. automobile cooling fan control circuit according to claim 1 is characterized in that, described pressure switch (3) is double pressure switch, and its lower limit switching value is 0.2MPa, and upper limit switching value is 3MPa.
3. automobile cooling fan control circuit according to claim 1 is characterized in that, described fan control unit is single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104272561A CN102889229A (en) | 2012-10-31 | 2012-10-31 | Automobile cooling fan control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104272561A CN102889229A (en) | 2012-10-31 | 2012-10-31 | Automobile cooling fan control circuit |
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| Publication Number | Publication Date |
|---|---|
| CN102889229A true CN102889229A (en) | 2013-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104272561A Pending CN102889229A (en) | 2012-10-31 | 2012-10-31 | Automobile cooling fan control circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105525976A (en) * | 2015-12-30 | 2016-04-27 | 东风汽车公司 | Cooling fan drive system of vehicle-mounted generator set |
| CN111520354A (en) * | 2020-05-13 | 2020-08-11 | 安徽江淮汽车集团股份有限公司 | Series-parallel control circuit and device |
| CN111535915A (en) * | 2020-06-03 | 2020-08-14 | 龙城电装（常州）有限公司 | Control circuit for cooling fan controller |
Citations (6)
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| CN201739001U (en) * | 2010-06-23 | 2011-02-09 | 浙江豪情汽车有限公司 | High/low speed control circuit for two automobile fans |
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| CN202867304U (en) * | 2012-10-31 | 2013-04-10 | 无锡商业职业技术学院 | Automotive cooling fan control circuit |
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2012
- 2012-10-31 CN CN2012104272561A patent/CN102889229A/en active Pending
Patent Citations (6)
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| US5414306A (en) * | 1990-11-30 | 1995-05-09 | Naldec Corporation | Protecting apparatus for electronic device of vehicle having solar battery and storage battery |
| US20020093299A1 (en) * | 2001-01-09 | 2002-07-18 | Toshimi Kobayashi | Motor fan control apparatus |
| JP2003054250A (en) * | 2001-08-21 | 2003-02-26 | Fuji Heavy Ind Ltd | Vehicular cooling fan control device |
| CN201739001U (en) * | 2010-06-23 | 2011-02-09 | 浙江豪情汽车有限公司 | High/low speed control circuit for two automobile fans |
| CN202202941U (en) * | 2011-08-29 | 2012-04-25 | 广西玉柴机器股份有限公司 | Electronic fan of commercial vehicle |
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| 何春鸣: "汽车发动机冷却风扇控制技术评析", 《上海汽车》 * |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105525976A (en) * | 2015-12-30 | 2016-04-27 | 东风汽车公司 | Cooling fan drive system of vehicle-mounted generator set |
| CN105525976B (en) * | 2015-12-30 | 2018-03-27 | 东风汽车公司 | A kind of vehicle-based generator set cooling fan drive system |
| CN111520354A (en) * | 2020-05-13 | 2020-08-11 | 安徽江淮汽车集团股份有限公司 | Series-parallel control circuit and device |
| CN111535915A (en) * | 2020-06-03 | 2020-08-14 | 龙城电装（常州）有限公司 | Control circuit for cooling fan controller |
| CN111535915B (en) * | 2020-06-03 | 2021-11-26 | 龙城电装（常州）有限公司 | Control circuit for cooling fan controller |
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Application publication date: 20130123 |