CN113715575A - Automatic defogging system of vehicle and vehicle - Google Patents

Automatic defogging system of vehicle and vehicle Download PDF

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Publication number
CN113715575A
CN113715575A CN202110914052.XA CN202110914052A CN113715575A CN 113715575 A CN113715575 A CN 113715575A CN 202110914052 A CN202110914052 A CN 202110914052A CN 113715575 A CN113715575 A CN 113715575A
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China
Prior art keywords
relay
vehicle
triode
blower
capacitor
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Pending
Application number
CN202110914052.XA
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Chinese (zh)
Inventor
朱俊峰
章志才
崔建维
王宜海
杨菲菲
汪中奇
贾载勋
潘瑞
范宝
陈强
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Anhui Jianghuai Automobile Group Corp
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Anhui Jianghuai Automobile Group Corp
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Priority to CN202110914052.XA priority Critical patent/CN113715575A/en
Publication of CN113715575A publication Critical patent/CN113715575A/en
Pending legal-status Critical Current

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    • 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
    • B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
    • B60H1/00785—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models by the detection of humidity or frost
    • 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
    • B60H1/00821—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being ventilating, air admitting or air distributing devices
    • B60H1/00828—Ventilators, e.g. speed control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/023—Cleaning windscreens, windows or optical devices including defroster or demisting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/54—Cleaning windscreens, windows or optical devices using gas, e.g. hot air

Abstract

The application discloses an automatic demisting system of a vehicle and the vehicle, wherein the automatic demisting system comprises a humidity detector, an air volume controller and an air conditioning system; the humidity detector is installed in a cab of the vehicle; the input end of the air volume controller is connected with the output end of the humidity detector, and the output end of the air volume controller is connected with the control end of a speed regulation module of an air blower of the air conditioning system. This application is automatic opens and closes the air conditioner according to humidity in the car, avoids the driver to operate air conditioning system repeatedly and carries out the driving fatigue that the defogging caused and influence driving safety.

Description

Automatic defogging system of vehicle and vehicle
Technical Field
The present application relates to the field of vehicle technology, and more particularly, to an automatic defogging system for a vehicle and a vehicle.
Background
In the existing air conditioning system of the automobile, when a power switch, a windshield switch and an air conditioning AC switch of the automobile are turned on, a condenser fan and a compressor start to work, a refrigerant (R134a) flows through a refrigerant circulating system of an evaporation core body in an air box, and low-temperature liquid refrigerants formed by the action of the compressor, the condenser, a throttling pipe and the like absorb heat of peripheral air, so that refrigeration is realized.
Based on current air conditioning system, in the humid weather such as rainy season, fog easily on the front windshield, the driver needs to manually turn on the air conditioner and carries out the defogging, needs the manual air conditioner of closing again after the fog disappears, avoids the promotion of oil consumption, but such repeated operation causes driver fatigue easily, influences driving safety.
Disclosure of Invention
The application provides an automatic defogging system and vehicle of vehicle, opens and closes the air conditioner according to humidity is automatic in the car, avoids the driver to operate air conditioning system repeatedly and carries out the driving fatigue that the defogging caused and influence driving safety.
The application provides an automatic defogging system for a vehicle, which comprises a humidity detector, an air volume controller and an air conditioning system;
the humidity detector is installed in a cab of the vehicle;
the input end of the air volume controller is connected with the output end of the humidity detector, and the output end of the air volume controller is connected with the control end of a speed regulation module of an air blower of the air conditioning system.
Preferably, the moisture detector is a first capacitor.
Preferably, the air volume controller comprises a first relay and a relay controller;
the first end of the electromagnetic coil of the first relay is connected with the power output end of the vehicle, and the second end of the electromagnetic coil of the first relay is connected with the output end of the relay controller; a first normally open contact of the first relay is connected with the power output end of the vehicle, and a second normally open contact of the first relay is connected with the control end of the speed regulating module of the blower;
the input terminal of the relay controller is connected to the first terminal of the first capacitor.
Preferably, the relay controller includes a first transistor and a base signal generator of the first transistor;
the collector of the first triode is connected with the second end of the electromagnetic coil of the first relay, and the emitter of the first triode is grounded;
the output end of the base signal generator is connected with the base of the first triode, the input end of the base signal generator is connected with the first end of the first capacitor, and the second end of the first capacitor is connected with the base of the first triode.
Preferably, the base signal generator comprises a voltage comparator and an input signal generator;
the reverse input end of the voltage comparator is connected with the output end of the input signal generator, the homodromous input end of the voltage comparator is grounded, and the output end of the voltage comparator is connected with the base electrode of the first triode;
an input terminal of the input signal generator is connected to a first terminal of the first capacitor.
Preferably, the input signal generator includes an LC tank, a second transistor, and a second capacitor;
the first end of the LC oscillating circuit is connected with the first end of the first capacitor, and the second end of the LC oscillating circuit is connected with the reverse input end of the voltage comparator;
the base electrode of the second triode is connected with the second end of the LC oscillation circuit, the collector electrode of the second triode is connected with the first end of the first capacitor, and the emitter electrode of the second triode is grounded;
the second capacitor is arranged between the emitter of the second triode and the base of the second triode.
Preferably, a first end of a speed regulating module of the blower is grounded, and a second end of the speed regulating module of the blower is respectively connected with a negative electrode of a temperature controller of the air conditioning system, a negative electrode of an indicator lamp of an air conditioner AC switch of the air conditioning system, an output end of a blower motor of the air conditioning system and a first end of an electromagnetic coil of a blower relay of the air conditioning system;
the second end of the electromagnetic coil of the blower relay is connected with a second ignition switch of the vehicle; the input of blower motor is connected with the first normally closed contact of blower relay, and the second normally closed contact of blower relay is connected with the power output of vehicle, and the positive pole of temperature controller is connected with the positive pole of pilot lamp.
Preferably, the control end of the temperature controller is connected with the first end of the electromagnetic coil of the air-conditioning relay of the air-conditioning system through the pressure switch, and the second end of the electromagnetic coil of the air-conditioning relay is connected with the first normally-closed contact of the blower relay.
Preferably, the first normally open contact of the air conditioning relay is connected with the electromagnetic clutch, and the second normally open contact of the air conditioning relay is connected with the first ignition switch of the vehicle.
The application also provides a vehicle, which comprises the automatic defogging system of the vehicle.
Further features of the present application and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.
FIG. 1 is a schematic illustration of an automatic defogging system for a vehicle according to the present disclosure;
fig. 2 is a circuit diagram of an automatic defogging system according to an embodiment of the present disclosure.
Detailed Description
Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
The application provides an automatic defogging system and vehicle of vehicle, opens and closes the air conditioner according to humidity is automatic in the car, avoids the driver to operate air conditioning system repeatedly and carries out the driving fatigue that the defogging caused and influence driving safety.
As shown in fig. 1, the automatic defogging system for a vehicle includes a humidity detector 110, an air volume controller 120, and an air conditioning system 130.
The humidity detector 110 is installed in a cabin of the vehicle.
As one example, moisture detector 110 is a first capacitor. The capacitor is formed by two electrode plates and a dielectric material between the two electrode plates.
The capacitance C of the capacitor is calculated as follows:
Figure BDA0003204988920000041
wherein S is the electrostatic area of the electrode plate, d is the distance between the two electrode plates, and epsilon is the dielectric constant of the medium between the two electrode plates. During the test, the electrostatic area S and the spacing d of the electrode plates of the capacitor are constant, and thus the capacitance C of the moisture detector is determined by the dielectric constant of the medium. Since the dielectric constant of water and air is different, the dielectric constant changes as the mist increases and decreases (i.e., as the humidity changes), and the capacitance changes accordingly. The capacitance varies with the amount of mist in the cab of the vehicle.
Because fog in the automobile mainly influences the definition of the front windshield and further influences the sight of a driver, the first capacitor is preferably adhered to the front windshield, defogging is carried out on the front windshield based on the fog content of the front windshield, and the driving requirement can be met to the greatest extent.
The input end of the air volume controller 120 is connected to the output end of the moisture detector 110, and the output end of the air volume controller 120 is connected to the control end of the speed regulation module of the blower of the air conditioning system of the vehicle. When defogging is needed, the air volume regulator is connected with a circuit of the control end of the speed regulation module, and under the condition that other conditions are met, the speed regulation module is started to regulate the air volume.
As one embodiment, the air volume controller includes a first relay and a relay controller.
The first end of the electromagnetic coil of the first relay is connected with the power output end B + of the vehicle, and the second end of the electromagnetic coil of the first relay is connected with the output end of the relay controller. The first normally open contact of the first relay is connected with the power output end B + of the vehicle, and the second normally open contact of the first relay is connected with the control end of the speed regulation module of the air blower.
The input terminal of the relay controller is connected to the first terminal of the first capacitor.
The relay controller receives the humidity signal of the first capacitor, when the humidity reaches a certain degree, the relay controller generates an output signal, the first relay is conducted, and the air conditioning system starts demisting.
As one embodiment, the relay controller includes a first transistor and a base signal generator of the first transistor. The collector of the first triode (as the output end of the relay controller) is connected with the second end of the electromagnetic coil of the first relay, the emitter of the first triode is grounded, and the base of the first triode is connected with the output end of the base signal generator. The input end of the base signal generator is connected with the first end of the first capacitor, and the second end of the first capacitor is connected with the base.
The base signal generator receives the humidity signal of the first capacitor, when the humidity reaches a certain degree, the voltage generated by the base signal generator is higher than the threshold voltage of the first triode, the first triode is conducted, the first relay is conducted, and the air conditioning system starts demisting.
As one embodiment, the base signal generator includes a voltage comparator and an input signal generator;
the reverse input end of the voltage comparator is connected with the output end of the input signal generator, the same-direction input end of the voltage comparator is grounded, and the output end of the voltage comparator (serving as the output end of the base signal generator) is connected with the base of the first triode.
Fig. 2 shows a circuit diagram of one embodiment of the automatic defog system of the present application. As shown in fig. 2, the voltage comparator and the input signal generator constitute a base signal generator, the first transistor Q1, the voltage comparator and the input signal generator constitute a relay controller, and the first relay K, the first transistor Q1, the voltage comparator and the input signal generator constitute an air volume controller.
As shown in fig. 2, the input signal generator includes an LC tank (including a sixth capacitor C4 and an inductor L), a second transistor Q2, and a second capacitor C5. A first end (shown as the lower end in fig. 2) of the LC tank is connected to a first end (shown as the lower end in fig. 2) of a first capacitor C3, and a second end (shown as the upper end in fig. 2) of the LC tank is connected to the inverting input of the voltage comparator. The base of the second transistor Q2 is connected to the second end of the LC tank, the collector 1 of the second transistor Q2 is connected to the first end of the first capacitor C3, and the emitter 2 of the second transistor Q2 is grounded. The second capacitor C5 is disposed between the emitter 2 of the second transistor Q2 and the base of the second transistor Q2. The second triode Q2 plays a role in signal amplification, and the attenuation of the oscillation signal is avoided.
Preferably, a first resistor R1 is arranged between the base of the second triode Q2 and the second end of the LC oscillating circuit, the base of the second triode Q2 is grounded through the second resistor R2, and the emitter of the second triode Q2 is grounded through the third resistor R3. The first resistor R1, the second resistor R2 and the third resistor R3 play a role in limiting current.
Preferably, a third capacitor C6 is arranged between the first capacitor C3 and the LC oscillating circuit, so that current fluctuation is reduced, and the stability of signals is ensured.
Preferably, a fourth capacitor C1 is disposed between the unidirectional input terminal + and the output terminal of the voltage comparator, a fifth capacitor C2 is disposed between the inverting input terminal-and the unidirectional input terminal + of the voltage comparator, and the fourth capacitor C1 and the fifth capacitor C2 play a role of filtering, so as to prevent noise signals from affecting the humidity signal.
When the second transistor Q2 is turned on, if the voltage of the collector 1 of the second transistor Q2 rises, the voltage of the emitter 2 of the second transistor Q2 rises, the current passing through the third resistor R3 becomes large, and the BE current flowing through the second transistor Q2 also becomes large, thereby forming positive feedback. Therefore, the oscillating signal generated by the LC oscillating circuit is continuously fed back positively from the emitter of the second transistor Q2 through the second capacitor C5, forming a continuous oscillating signal.
As shown in fig. 2, the air conditioning system of the vehicle includes an air conditioner AC switch, a temperature controller, a pressure switch, a blower motor, a speed control module of a blower, a blower relay, an air conditioner relay, a compressor, and a condenser, an electromagnetic clutch is provided inside the compressor, and an indicator lamp is provided inside the air conditioner AC switch.
A first end of an electromagnetic coil of the blower relay is connected with a second end of the speed regulation module, a negative electrode of the thermostat and a negative electrode a1 of the indicator lamp (shown as a lower electrode of the indicator lamp in fig. 2), respectively, and a second end of the electromagnetic coil of the blower relay is connected with a second ignition switch IG2 of the vehicle. And a first normally closed contact of the blower relay is connected with the input end of the blower motor, and a second normally closed contact of the blower relay is connected with a power output end B + of the vehicle.
The first end of the speed regulation module is grounded, the second end of the speed regulation module is connected with the output end of the blower motor, and the control end of the speed regulation module (receiving the FTA control signal) is connected with the second normally open contact of the first relay of the air volume controller.
The positive electrode of the thermostat is connected to a positive electrode a6 of the indicator light (shown as the upper electrode of the indicator light in fig. 2). The control end L of the temperature controller is connected with the first end of the electromagnetic coil of the air-conditioning relay through the pressure switch, and the second end of the electromagnetic coil of the air-conditioning relay is connected with the first normally closed contact of the blower relay. And a first normally open contact of the air-conditioning relay is connected with an electromagnetic clutch and a condenser in the compressor, and a second normally open contact of the air-conditioning relay is connected with a first ignition switch IG1 of the vehicle.
Before the automatic defogging system works, the power supply of the vehicle, the first ignition switch IG1, the second ignition switch IG2 and the air conditioner AC switch are all in an opening state.
The first capacitor C3 detects the amount of fog at the front windshield, and as the fog increases, the capacitance of the first capacitor C3 decreases. The LC oscillating circuit outputs sine alternating current, when the voltage on the upper side of the inductor L is reverse voltage, the reverse input end-input on the upper side of the voltage comparator is reverse voltage, the homodromous input end + on the lower side of the voltage comparator is grounded, and then the output end of the voltage comparator outputs forward voltage to the base electrode of the first triode Q1. Along with the increase of fog content, the forward voltage of the base of the first triode Q1 gradually increases, and when the forward voltage is higher than the turn-on voltage of the first triode Q1, the first triode Q1 is conducted, the first relay K is attracted, the speed regulation module is conducted, the electromagnetic coil of the blower relay is electrified, the blower relay is conducted, and the blower starts to supply air. The positive and negative poles of the temperature controller are powered on and opened, the positive and negative poles of the indicator light are powered on and opened, the output end of the temperature controller outputs a voltage signal, and the pressure switch is switched on, so that the electromagnetic coil of the air conditioning relay is electrified, the air conditioning relay is switched on, the electromagnetic clutch is closed, the compressor and the condenser start to work, the ambient air is dehumidified, and the front gear air port starts to demist.
When fog at the front windshield gradually decreases, the capacitance of the first capacitor C3 is continuously increased, when the base voltage of the first triode Q1 is lower than the starting voltage of the first triode Q1, the first triode Q1 is cut off, the first relay K is disconnected, the speed regulation module stops working, the front windshield is not subjected to demisting work, and therefore automatic demisting of a vehicle is achieved.
The larger the fog content at the front windshield is, the lower the capacitance of the first capacitor C3 is, and the longer the base voltage of the first triode Q1 is at a high level, the larger the air volume of the blower is, and conversely, the smaller the air volume of the blower is, thereby realizing the function of air volume adjustment.
Based on above-mentioned automatic defogging system, this application still provides a vehicle including above-mentioned automatic defogging system.
Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.

Claims (10)

1. An automatic demisting system of a vehicle is characterized by comprising a humidity detector, an air volume controller and an air conditioning system;
the humidity detector is installed in a cab of the vehicle;
the input end of the air volume controller is connected with the output end of the humidity detector, and the output end of the air volume controller is connected with the control end of a speed regulation module of an air blower of the air conditioning system.
2. The automatic defogging system for a vehicle according to claim 1, wherein said moisture detector is a first capacitor.
3. The automatic defogging system for a vehicle according to claim 2, wherein said airflow controller comprises a first relay and a relay controller;
the first end of the electromagnetic coil of the first relay is connected with the power output end of the vehicle, and the second end of the electromagnetic coil of the first relay is connected with the output end of the relay controller; a first normally open contact of the first relay is connected with a power output end of the vehicle, and a second normally open contact of the first relay is connected with a control end of a speed regulating module of the blower;
an input terminal of the relay controller is connected to a first terminal of the first capacitor.
4. The automatic defogging system according to claim 3, wherein said relay controller comprises a first transistor and a base signal generator of the first transistor;
the collector of the first triode is connected with the second end of the electromagnetic coil of the first relay, and the emitter of the first triode is grounded;
the output end of the base electrode signal generator is connected with the base electrode of the first triode, the input end of the base electrode signal generator is connected with the first end of the first capacitor, and the second end of the first capacitor is connected with the base electrode of the first triode.
5. The automatic defogging system according to claim 4, wherein said base signal generator comprises a voltage comparator and an input signal generator;
the reverse input end of the voltage comparator is connected with the output end of the input signal generator, the homodromous input end of the voltage comparator is grounded, and the output end of the voltage comparator is connected with the base electrode of the first triode;
an input terminal of the input signal generator is connected to a first terminal of the first capacitor.
6. The automatic defogging system according to claim 5, wherein said input signal generator comprises an LC tank circuit, a second transistor and a second capacitor;
a first end of the LC oscillating circuit is connected with a first end of the first capacitor, and a second end of the LC oscillating circuit is connected with an inverted input end of the voltage comparator;
a base electrode of the second triode is connected with the second end of the LC oscillation circuit, a collector electrode of the second triode is connected with the first end of the first capacitor, and an emitting electrode of the second triode is grounded;
the second capacitor is arranged between the emitter of the second triode and the base of the second triode.
7. The automatic defogging system according to claim 1, wherein a first end of a speed regulating module of said blower is grounded, and a second end of said speed regulating module of said blower is respectively connected to a negative electrode of a temperature controller of said air conditioning system, a negative electrode of an indicator light of an AC switch of an air conditioner of said air conditioning system, an output terminal of a blower motor of said air conditioning system, and a first end of an electromagnetic coil of a blower relay of said air conditioning system;
the second end of the electromagnetic coil of the blower relay is connected with a second ignition switch of the vehicle; the input end of the blower motor is connected with the first normally closed contact of the blower relay, the second normally closed contact of the blower relay is connected with the power output end of the vehicle, and the anode of the temperature controller is connected with the anode of the indicator light.
8. The automatic defogging system according to claim 7, wherein a control terminal of said thermostat is connected to a first terminal of an electromagnetic coil of an air conditioning relay of said air conditioning system via a pressure switch, and a second terminal of said electromagnetic coil of said air conditioning relay is connected to a first normally closed contact of said blower relay.
9. The automatic defogging system according to claim 8, wherein a first normally open contact of said air conditioning relay is connected to an electromagnetic clutch, and a second normally open contact of said air conditioning relay is connected to a first ignition switch of said vehicle.
10. A vehicle characterized by comprising an automatic defogging system for a vehicle according to any one of claims 1 to 9.
CN202110914052.XA 2021-08-10 2021-08-10 Automatic defogging system of vehicle and vehicle Pending CN113715575A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4350286A (en) * 1979-08-20 1982-09-21 Diesel Kiki Company, Ltd. Humidity control apparatus
US5653904A (en) * 1996-06-18 1997-08-05 Adlparvar; Sam Defogging system for the front and rear windshields of a vehicle
CN201751249U (en) * 2010-06-22 2011-02-23 浙江吉利汽车研究院有限公司 Controller for removing fog on automobile glass
CN106976379A (en) * 2017-05-02 2017-07-25 安徽江淮松芝空调有限公司 A kind of automobile air conditioner control system
US20190030997A1 (en) * 2017-07-28 2019-01-31 Mazda Motor Corporation Vehicle antifogging system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4350286A (en) * 1979-08-20 1982-09-21 Diesel Kiki Company, Ltd. Humidity control apparatus
US5653904A (en) * 1996-06-18 1997-08-05 Adlparvar; Sam Defogging system for the front and rear windshields of a vehicle
CN201751249U (en) * 2010-06-22 2011-02-23 浙江吉利汽车研究院有限公司 Controller for removing fog on automobile glass
CN106976379A (en) * 2017-05-02 2017-07-25 安徽江淮松芝空调有限公司 A kind of automobile air conditioner control system
US20190030997A1 (en) * 2017-07-28 2019-01-31 Mazda Motor Corporation Vehicle antifogging system

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