KR100803522B1 - Apparatus and method for controlling intake adjustment of inner air and outer air in hvac system - Google Patents

Abstract

A device and a method for controlling intake of inner/outer air in an HVAC(Heating, Ventilating and Air Conditioning) system are provided to vary intake amount of inner and outer air blown toward a heater according to an operation step of a blower and control an opening degree of an intake door accordingly, thereby achieving fast heating of a vehicle room. A device for controlling intake of inner/outer air in an HVAC system includes a sensor part for sensing conditions required for intake control of inner and outer air, the sensor part includes an outer air temperature sensor(10), a vehicle speed sensor(12), and a cooling water sensor(14). A microcomputer advances an intake control mode for the inner/outer air based on the data output from the sensor part. In the intake control mode, intake amounts of the inner/outer air are set according to input blower conditions, and an intake door(20) is controlled according to the set intake amounts.

Description

Apparatus and method for controlling intake adjustment of inner air and outer air in HVAC system}

1 is a view showing an example of an air conditioner of a conventional vehicle.

Figure 2 is a block diagram of the internal and external air intake control control device in an air conditioner according to an embodiment of the present invention.

3 is a view showing an example of the blower switch and the temperature control switch shown in FIG.

FIG. 4 is a flowchart illustrating a method for controlling air intake / outtake air in an air conditioner according to an embodiment of the present invention.

<Description of Symbols for Major Parts of Drawings>

10: outside temperature sensor 12: vehicle speed sensor

14 coolant temperature sensor 16 blower switch

18: temperature control switch 20: intake door

22: door drive unit 24: blower motor

26 blower motor drive unit 28 microcomputer

The present invention relates to an internal and external air intake control control device and method in an air conditioner, and more particularly, to quickly adjust the intake of the air and the outside air in the air conditioner in cold weather by heating the room quickly It relates to an apparatus and a method for this to be done.

In general, an air conditioner of a vehicle is a means for maintaining air in a vehicle in a comfortable state, and includes a cooling device, a heating device, a ventilation device, and the like.

1 shows an example of an air conditioner of a conventional vehicle. The air conditioner 101 includes an air conditioner casing 110; A compressor (not shown) for compressing the gas phase refrigerant at high temperature and high pressure; A condenser (not shown) for condensing the high temperature and high pressure gas phase refrigerant introduced from the compressor into the liquid phase refrigerant; An evaporator 115 accommodated inside the air conditioner casing 110 and configured to heat exchange the liquid refrigerant introduced from the condenser and the ambient air to cool the ambient air; And a drain 140 connected to the air conditioner casing 110 to discharge the condensed water 105 generated in the evaporator 115 to the outside.

The air conditioner casing 110 is accommodated in a space formed by the dash panel 102 provided in front of the vehicle body and the floor panel 103 provided on the bottom of the vehicle body so as to partition the vehicle interior and the engine room.

Inside the air conditioner casing 110 is installed adjacent to the outside of the fan 113 forcibly blowing outdoor air toward the evaporator 115, the air introduced by the fan 113 from the rear of the fan 113 and the inside As the refrigerant is heat-exchanged, an evaporator 115 for cooling the ambient air and a heater 120 for heating the ambient air are provided. The fan 113 is operated by a blower motor (not shown). In addition, a door 125 is mounted between the evaporator 115 and the heater 120 to selectively supply air via the evaporator 115 to the heater 120 by a passenger's operation. Although not shown in the figure, coolant flows through the heater core. Thus, the air passing through the evaporator 115 and the heater 120 is distributed to a discharge port (not shown) formed toward the interior of the vehicle and supplied to the interior of the vehicle.

Typically, when the temperature outside the vehicle is low (that is, in cold weather), the heater 120 of the air conditioner is operated so that warm wind is discharged to the interior of the vehicle. Although the air discharged after the heater 120 has to be warmed up quickly, warm wind is not discharged from the beginning due to the temperature of the coolant and the external temperature of the water passing through the heater 120 and the cooled inside temperature of the car. As the vehicle's coolant temperature rises, the discharged wind begins to warm up gradually.

Looking at the method of introducing air and its problems when operating the heater of the conventional air conditioner as follows.

First, there is a method of blocking 100% of the bet air at the intake door (not shown) to prevent any air inside the vehicle. This is a method of heating the inside of the vehicle by inhaling only the outside air of the vehicle. When using this method, when the temperature outside the vehicle is sharply low, it takes a long time for the coolant temperature to rise, so that passengers can feel the warm wind after a while, and the temperature inside the vehicle does not increase much.

Second, there is a method of adding a separate device to the case or door of the air inlet so that the bet air can be slightly introduced. This is a method of heating the inside of the vehicle by sucking most of the outside air of the vehicle and some of the inside air. When using this method, since a separate device is required, the configuration of the air conditioner becomes more complicated and it is very disadvantageous in terms of material cost or cost.

On the other hand, in the case of heating only the inside air of the vehicle by inhaling the inside of the vehicle, moisture is generated in the interior of the vehicle, thereby causing the fog due to excessive indoor humidity.

Finally, there is a problem that the outdoor air enters into the vehicle by driving the vehicle when the internal air and the outdoor air are always inhaled without setting control of the internal air amount and the external air amount.

The present invention has been proposed to solve the above-mentioned conventional problems, and the control device for controlling the internal and external air air intake in the air conditioner to improve the initial heating performance of the vehicle by setting and controlling the air volume and the outside air volume in cold weather And to provide a method.

In order to achieve the above object, the indoor and outdoor air intake control control apparatus in an air conditioner according to a preferred embodiment of the present invention includes an air conditioner of a vehicle that heats a vehicle interior by sucking internal air and outside air of the vehicle. In

A sensor unit for sensing and outputting condition information necessary for controlling the intake amount of the air and the outside air; And enter the suction amount control mode of the air and outside air based on the condition information from the sensor unit, and set the suction amount of the internal air and the outside air in accordance with the input blower condition in the suction amount control mode of the internal air and the outside air, And a microcomputer for controlling the intake door according to the set suction amount to suck in the air and the outside air.

The sensor unit may include a sensor that senses an outside temperature of the vehicle, a sensor that senses a driving speed of the vehicle, and a sensor that senses a coolant temperature of the vehicle.

The microcomputer enters the intake amount control mode of the air and outside air when the condition information from the sensor unit is information indicating a predetermined reference value or less.

The microcomputer sets the intake air and the intake air amount according to the blower stage determined by the blower switch when entering the intake air control mode of the intake air and the outside air.

The microcomputer sets the intake air and the intake air air in accordance with the voltage of the blower motor when entering the intake air volume control mode.

In the air conditioner control method of the air conditioner according to an embodiment of the present invention, in the air conditioner of the vehicle for heating the vehicle interior by sucking the air and the outside air of the vehicle,

A first step of receiving, by the microcomputer, condition information necessary for controlling the intake amount of the air and the outside air from the sensor unit; A second step in which the microcomputer enters the intake amount control mode of the air and outside air based on the condition information from the sensor unit; A third step of setting, by the microcomputer, an intake amount of the intake air and the outside air according to the input blower condition when the intake amount control mode of the intake air and the outside air is entered; And a fourth step in which the microcomputer controls the intake door in accordance with the set suction amount to suck the air and the outside air.

In the first step, the condition information from the sensor unit includes information of the outside air temperature of the vehicle, the traveling speed of the vehicle, and the cooling water temperature of the vehicle.

In the second step, when the outside air temperature of the vehicle is 15 ° C. or less, the running speed of the vehicle is 50 Km / h or less, and the cooling water temperature is 70 ° C. or less, it is determined to enter the intake amount control mode of the air and the outside air.

The third step sets the intake air and the intake air amount according to the blower stage determined by the blower switch when entering the intake air control mode of the intake air and the outside air. For example, in the third step, the higher the number of blower stages, the more the amount of intake air to betted is set as compared to the amount of the intake air at the lower stage of the blower stage.

The third step sets the intake air and the intake air amount according to the voltage of the blower motor when entering the intake air volume control mode. For example, in the third step, the higher the blower motor's voltage is, the more the intake air's intake is set compared to the intake air at the low voltage.

Hereinafter, with reference to the accompanying drawings will be described with respect to the internal and external air intake control control apparatus and method in an air conditioner according to an embodiment of the present invention.

Figure 2 is a block diagram of the internal and external air intake control control device in an air conditioner according to an embodiment of the present invention. The apparatus of FIG. 2 includes an external air temperature sensor 10, a vehicle speed sensor 12, a coolant temperature sensor 14, a blower switch 16, a temperature control switch 18, an intake door 20, a door driver 22, a blower. A motor 24, a blower motor driver 26, and a microcomputer 28.

The outside air temperature sensor 10 senses a temperature outside the vehicle cabin and inputs it to the microcomputer 28. The outside air temperature sensor 10 is installed in front of the condenser shock shroud, for example, located in front of the vehicle.

The vehicle speed sensor 12 converts the rotation of the transmission output shaft into an electrical pulse signal and inputs it to the microcomputer 28. The vehicle speed sensor 12 is installed, for example, in a speed meter.

The coolant temperature sensor 14 detects the temperature of the coolant and inputs it to the microcomputer 28. The coolant temperature sensor 14 is mounted on, for example, a heater core (not shown), and senses the temperature of the coolant flowing through the heater core.

A blower switch 16 is installed on the dash panel in front of the driver's seat. The blower switch 16 is a switch operated by the passenger so as to control the rotation speed of the blower motor 24 for adjusting the air volume of the air conditioner. The blower switch 16 is connected to a resistor (not shown) by an electric circuit (not shown) to regulate a voltage input to the blower motor 24. The blower switch 16 is as illustrated in FIG. 3. In FIG. 3, when the blower switch 16 points to 0 stage, it is blow off, and when the blower switch 16 selects 1 stage, it is blown ON. In FIG. 3, the blower switch 16 can select up to four stages. Of course, the number of stages which the blower switch 16 can select may be added or subtracted.

A temperature switch 18 is installed on the dash panel in front of the driver's seat. The temperature control switch 18 is a switch operated by the passenger to adjust the discharge air temperature of the air conditioner. The thermostat switch 18 is as illustrated in FIG. 3.

The intake door 20 is installed in an intake duct (not shown) having an internal air intake port and an external air intake port. The intake door 20 adjusts the opening degree of the inside and outside air suction ports.

The door driver 22 drives the intake door 20 in accordance with a drive control signal from the microcomputer 28.

The blower motor 24 rotates a fan (not shown) and blows the inside air and the outside air sucked through the intake door 20 into the inside of the air conditioner.

The blower motor driver 26 drives the blower motor 24 in accordance with a drive control signal from the microcomputer 28.

The microcomputer 28 determines entry into the intake amount control mode of the air and outside air based on the condition information from the outside temperature sensor 10, the vehicle speed sensor 12, and the cooling water temperature sensor 14. When the microcomputer 28 enters the suction amount control mode of the air and the outside air, the microcomputer 28 sets the suction amount of the air and the outside air according to the input blower condition. The microcomputer 28 controls the opening degree of the intake door 20 according to the set suction amount.

The condition information from the outside temperature sensor 10 is the outside air temperature of the vehicle, the condition information from the vehicle speed sensor 12 is the traveling speed of the vehicle, and the condition information from the coolant temperature sensor 14 is the cooling water temperature of the vehicle. Such condition information is a value sensed by each sensor 10, 12, 14. The microprocessor 28 determines whether to enter the intake amount control mode of the air and the outside air based on the sensing values (ie, the condition information) from each sensor 10, 12, 14. That is, the microprocessor 28 may bet if the sensing values (i.e., condition information) from each of the sensors 10, 12, and 14 satisfy all of the conditions for entering the intake air control mode of the bet air and the outside air. Enters the intake amount control mode of air and outside air.

The microcomputer 28 sets the suction amount of the intake air and the outside air according to the blower stage determined by the blower switch 16 and enters the opening degree of the intake door 20 according to the blower stage determined by the blower switch 16 when entering the intake air control mode. To control. Alternatively, when the microcomputer 28 enters the intake air control mode of the intake air and the outside air, the microcomputer 28 sets the intake amount of the intake air and the outside air according to the voltage of the blower motor 24 and accordingly opens the intake door 20. To control. For this purpose, although not shown in the drawings, a voltage checker (or voltage detector) may be separately provided to check the voltage of the blower motor 24 and provide the microcomputer 28. Alternatively, the reference voltage value information of the blower motor 24 corresponding to the number of blowers may be stored in the internal memory (not shown) of the microcomputer 28 before use. These contents can be fully understood by those in the same industry even though not shown in the drawings.

Next, a method for controlling air intake / outtake air in an air conditioner according to an embodiment of the present invention will be described with reference to the flowchart of FIG. 4.

First, the microcomputer 28 determines whether the external air mode is ON. If the outdoor mode is set (i.e., ON) (" Yes " in S6), the microcomputer 28 sets the fresh air intake amount to 100% and sends a corresponding control signal to the door driver 22 ( S8). In this case, the door driver 22 adjusts the opening degree of the intake door 20 so that the suction amount of the air sucked through the intake door 20, that is, the amount of outside air becomes 100%.

 If the air mode is not set ("No" in S6), the microcomputer 28 determines whether the blower is operated.

The microcomputer 28 determines whether it is a MAX HOT condition when the blower is operated (“Yes” in S10), that is, when the blower stage is at least one stage by the blower switch 16. The max hot condition is when the temperature control switch 18 is turned to the maximum and is set to HOT.

In the case of the max hot condition (“Yes” in S12), the microcomputer 28 enters the intake air volume control mode of the air and the outside air based on the sensing values (ie, the condition information) from the respective sensors 10, 12, and 14. Decide if you need to enter. In FIG. 4, if the sensing value from the outside air temperature sensor 10 is 15 ° C. or less, the sensing value from the vehicle speed sensor 12 is 50 Km / h or less, and the sensing value from the cooling water temperature sensor 14 is 70 ° C. or less. And entering the intake amount control mode of the outside air. If any one of the three sensing values is not satisfied, the intake air volume control mode of the air and outside air is not entered. The numerical values given above (15 ° C. or less, 50 Km / h or less, 70 ° C. or less) are merely examples and are not to be regarded as the numerical values. The numerical values given above may vary from vehicle to vehicle.

If the sensing value (i.e., condition information) from each of the sensors 10, 12, and 14 meets all of the conditions to enter the intake air control mode of the air and the outside air (Yes in S14). &Quot; Yes " in S16, " YES " in S18) and enters the intake air volume control mode of the air and outside air.

Thereafter, the microcomputer 28 adjusts the suction amount of the air and the outside air according to the number of blowers.

For example, when the current stage of blower is one stage ("Yes" in S20), the microcomputer 28 sets the internal and external air intake amounts to 95% of the outside air and 5% of the inside air, and sets the corresponding control signal to the door driving unit ( 22) (S22). Thereby, the door drive part 22 adjusts the opening degree of the intake door 20 so that the suction amount of the inside and outside air suctioned through the intake door 20 may be 95% of outside air and 5% of inside air.

On the other hand, when the current stage of blowers is two stages ("Yes" in S24), the microcomputer 28 sets the internal and external air intake amounts to 90% of the outside air and 10% of the air, and sets the corresponding control signals to the door driver 22. Send to (S26). Accordingly, the door driver 22 adjusts the opening degree of the intake door 20 such that the suction amount of the internal and external air sucked through the intake door 20 is 90% of the outside air and 10% of the inside air.

Otherwise, when the current blower stage is three stages ("Yes" in S28), the microcomputer 28 sets the internal and external air intake amounts to 85% of the outside air and 15% of the air, and sets the corresponding control signal to the door driver 22. Send to (S30). Thereby, the door drive part 22 adjusts the opening degree of the intake door 20 so that the suction amount of the internal and external air suctioned through the intake door 20 may be 85% of outside air, and 15% of inside air.

Otherwise, if the current blower stage is the max stage (four stages according to Fig. 3) ("Yes" in S32), the microcomputer 28 sets the internal and external air intake amounts to 75% of the outside air and 25% of the inside air, and correspondingly. The control signal is transmitted to the door driver 22 (S34). Thereby, the door drive part 22 adjusts the opening degree of the intake door 20 so that the suction amount of the inside and outside air suctioned through the intake door 20 may be 75% of outside air and 25% of inside air.

In the above description, the internal and external air intake amounts are varied based on the number of blowers, but the internal and external air intake amounts can be varied based on the voltage of the blower motor 24. For example, the higher the voltage of the blower motor 24, the higher the suction amount of the bet air compared to the low voltage. In addition, the above-described values of the intake amount of the air blower and the intake air air for each stage of the blower are not limited to the values given but may vary and may vary from vehicle to vehicle.

As described above, the degree of opening and closing of the intake door 20 by the number of blowers or the blower voltage is adjusted, and the outside and outside air sucked through the adjusted intake door 20 is blown to the heater (not shown) to quickly heat the vehicle interior. The bowler condition described in the claims of the present invention is either a blower stage or a blower voltage.

On the other hand, the present invention is not limited only to the above-described embodiment, but can be modified and modified within the scope not departing from the gist of the present invention, the technical idea to which such modifications and variations are also applied to the claims Must see

As described in detail above, according to the present invention, when entering the intake amount control mode of the inside air and the outside air, the intake amount of the inside air and the outside air blown to the heater side by the blower stage number or the blower voltage is varied and the opening degree of the intake door is changed thereto. By adjusting accordingly, the inside of the vehicle is heated more quickly in cold weather by the intake air and the outside air, which is sucked through the intake door, and the inside temperature of the vehicle is increased.

In particular, by adjusting the suction amount of the air and the outside air appropriately without the need for a separate equipment compared to the conventional, the configuration of the device is simpler than the conventional method that requires a separate equipment, as well as the material cost or cost surface Very advantageous in

Claims (12)

In the air conditioner of a vehicle for heating the vehicle interior by inhaling the air and the outside air of the vehicle, A sensor unit for sensing and outputting condition information necessary for controlling the intake amount of the air and the outside air; And Entering the intake amount control mode of the inside air and outside air based on the condition information from the sensor unit, and sets the intake amount of the inside air and outside air in the intake amount control mode of the inside air and outside air according to the input blower condition And a microcomputer configured to control the intake door according to the set suction amount to suck the inside air and the outside air. The method according to claim 1, The sensor unit includes a sensor for sensing the outside air temperature of the vehicle, a sensor for detecting the running speed of the vehicle, and a sensor for sensing the temperature of the cooling water of the vehicle. The method according to claim 1, The microcomputer enters the suction amount control mode of the inside air and the outside air when the condition information from the sensor unit indicates information below a predetermined reference value. Regulating controls. The method according to claim 1, When the microcomputer enters the suction amount control mode of the internal air and the outdoor air, the microcomputer sets the internal and external air in the air conditioner according to the number of blowers determined by the blower switch. Suction Control Unit. The method according to claim 1, When the microcomputer enters the suction amount control mode of the inside air and the outside air, the inside and outside air intake control control in the air conditioner is set according to the voltage of the blower motor. Device. In the air conditioner of a vehicle for heating the vehicle interior by inhaling the air and the outside air of the vehicle, A first step of receiving, by a microcomputer, condition information necessary for controlling the intake amount of the inside air and the outside air from a sensor unit; A second step of the microcomputer entering the suction amount control mode of the air and the outside air based on the condition information from the sensor unit; A third step of setting, by the microcomputer, an intake amount of the intake air and the outside air according to an input blower condition when the intake amount control mode of the inside air and the outside air is entered; And And a fourth step of the microcomputer controlling the intake door according to the set suction amount to suck the inside air and the outside air. The method according to claim 6, The condition information from the sensor unit in the first step includes information on the outside air temperature of the vehicle, the traveling speed of the vehicle and the cooling water temperature of the vehicle. The method according to claim 7, In the second step, when the outside air temperature of the vehicle is 15 ° C. or less, the running speed of the vehicle is 50 Km / h or less, and the cooling water temperature is 70 ° C. or less, entering the intake amount control mode of the inside air and the outside air is entered. In and outside air intake control control method for an air conditioner characterized in that. The method according to claim 6, In the third step, the internal and external air in the air conditioner is set according to the number of blowers determined by the blower switch when entering the intake control mode of the inside air and the outside air. Air intake control control method. The method according to claim 9, The third step is a control method of the indoor and outdoor air intake control in the air conditioner, characterized in that the higher the blower stage is set the intake amount of the bet air more than the intake air intake at the lower blower stage. The method according to claim 6, In the third step, when entering the intake amount control mode of the inside air and the outside air, the inside and outside air intake control in the air conditioner is set in accordance with the voltage of the blower motor. Control method. The method according to claim 11, The third step is a control method of the indoor and outdoor air intake control in the air conditioner, characterized in that the higher the voltage of the blower motor, the more the amount of the intake air is compared with the intake air at the low voltage.

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