KR20100031823A - The control method of air conditioner for vehicle - Google Patents

Abstract

PURPOSE: A controlling method of a car air conditioner is provided to set a temperature of the inside of a car by verifying a surface temperature sensor detection value of a passenger and an inner machine temperature sensor detection value. CONSTITUTION: A controlling method of a car air conditioner comprises the following steps: sensing each values of an inner machine temperature sensor, an outside temperature sensor, and a passenger surface temperature sensor(S100); determining the condition of a cooling mode condition or a heating mode condition(S110); setting the temperature of the inside of the car with the inner machine temperature sensor value if the condition is in the cooling mode condition(S130); performing the cooling mode condition in which the temperature of the inside of the car reaches a fixed goal temperature; determining whether or not the fixed goal temperature has been reached; and performing a regular heating-cooling mode of the inside of the car by setting the temperature with the passenger surface temperature sensor value(S170).

Description

The control method of air conditioner for vehicle

The present invention relates to a control method of a vehicle air conditioner, and more particularly, in the case of parking or leaving the vehicle outside for a long time in winter or summer, the occupant can feel comfortable enough within a short time after boarding the vehicle and operating the engine. It relates to a control method of a vehicle air conditioner.

In general, an air conditioner of a vehicle is a device that cools or heats a vehicle interior by introducing air from the exterior of a vehicle or inside a vehicle to heat or cool the air to blow into the interior of the vehicle. A flow path for inducing air is formed, and on this flow path, heat exchangers for heating or cooling the blower air and cold and warm air heated or cooled while passing through the heat exchangers are distributed to each part of the interior of the vehicle. Several doors are provided for guiding.

1 is a cross-sectional view schematically showing the internal structure of such an air conditioner for a vehicle. In particular, a semi-center comprising an air evaporator unit for cooling the air and a heater unit for heating in order to miniaturize the air conditioner. It shows the internal structure of the semi-center type air conditioner (1).

As shown, the evaporator 3 is provided upstream of the internal flow path of the air conditioning case 2, and the heater core 4 is provided downstream.

A blower case (not shown) is provided at the inlet end of the air conditioning case 1, and a blower fan (not shown) driven by a motor (not shown) is installed in the blower case.

An indoor unit suction port (not shown) and an outdoor unit suction port (not shown) are installed at an upper portion of the blower case, and the suction ports are opened and closed according to the turning of the switching door (not shown).

Therefore, the air flows into the blower case through the indoor unit suction port or the outdoor unit suction port by the suction force generated by the rotation of the blower fan according to the driving of the motor, and is blown into the internal flow path of the air conditioning case 1 so that the evaporator 3 And / or air passing through the heater core 4 may be changed to cold or warm air.

In addition, a defrost vent connected to a defrost duct (not shown) for guiding air discharge toward the car window at the exit end of the air conditioning case 1 at the rear side of the heater core 4 to remove the defrost of the car window. (5) and a face vent 6 connected to a vent duct (not shown) for guiding the air discharged toward the upper half of the vehicle interior, and a floor duct (not shown) for guiding the air discharged toward the lower half of the vehicle interior. Floor vents 7 are connected in turn.

In addition, the vents 5, 6, and 7 are respectively opened and closed by doors 5a, 6a, and 7a according to a predetermined heating and cooling mode.

On the other hand, the heater core 4 is installed so as to occupy the lower half of the cross-sectional area of the internal flow path of the air conditioning case 1, and in front of the heater core 4 (that is, between the heater core 4 and the evaporator 3). ) Is provided with a ventilation passage 9 on the heater core 4 side and a temperature control door 8 for adjusting the opening degree of the internal flow path 10 of the air conditioning case 1 on the heater core upper side.

Therefore, when the temperature control door 8 is blocking the blow passage 9 on the heater core 4 side, the air passing through the evaporator 3 bypasses the heater core 4 without passing through the heater core 4. Cooling of the vehicle interior may be performed by discharging the vehicle through the open vents among the vents 5, 6 and 7.

In addition, when the temperature control door 8 is blocking the inner flow path 10 side of the air conditioning case 1 on the upper side of the heater core 4, all the air passing through the evaporator 3 passes through the heater core 4. Heating of the vehicle interior may be performed by discharging the vehicle through the open vents among the vents 5, 6 and 7.

In recent years, such an air conditioning apparatus has been developed from a manual type to a fully automatic type (Full Auto Temperature Control; FATC) in accordance with a trend that all systems of automobiles are automated and electronically. Devices continue to expand in popularity.

In general, a manual air conditioner manually controls a mode, air volume, and temperature by directly manipulating a control switch installed in the center of an instrument panel in a vehicle according to a driver's or passenger's degree of indoor temperature. On the contrary, if the air conditioner is set only to the room temperature required by the driver, the mode, air volume, etc. are automatically controlled by the programmed Micom according to external conditions. It can be operated more conveniently and safely without any operation.

On the other hand, the fully automatic air conditioner, the input signal such as a coolant temperature sensor (Sensor) and a control switch for detecting the air temperature (indoor temperature), outside temperature (outdoor temperature), evaporator, water temperature of the heater core (heater core), etc. Micom controls various module motors (mode door motor, temp door motor, internal and external door motor) through logical operation, and keeps the indoor temperature at the set temperature of the driver.

As an example of the related art for controlling such a vehicle air conditioning apparatus, there is a heating and cooling apparatus for a vehicle, which is Korea Patent Publication No. 10-1998-039792, and a control method thereof.

The prior art includes a coolant temperature sensor for detecting a coolant temperature, and an outside temperature sensor for sensing a temperature of outside air; An operation unit for setting a target temperature and an operation mode of the front, rear, left and right of the vehicle; An infrared sensor installed in the center of the vehicle and measuring presence and absence of a passenger; A vehicle temperature sensor measuring a temperature of each part of the vehicle compartment; A temperature control unit for controlling the air temperature flowing through independent ducts before and after the vehicle, respectively; The cooling water temperature sensor, the outside air temperature sensor, the vehicle interior temperature sensor, the control unit for receiving a signal from the operation unit and the infrared sensor and outputs the appropriate control signal to the temperature control unit is configured as a vehicle air conditioning system, The control method includes the steps of: starting a program stored in the control unit when the vehicle is started; Determining whether the cooling water temperature is above a predetermined temperature; Determining whether an occupant is present from an input value of an infrared sensor when the cooling water temperature is higher than a predetermined temperature; Determining the temperature of each occupant from the input value of the infrared sensor, if the occupant is present; Receiving a desired room temperature and an operation mode of the front, rear, left, and right sides from the operation unit; Receiving measurement values of the outside air temperature and the compartment temperature of each part from the outside air temperature sensor and the room temperature sensor; Determining whether the driving mode is an automatic mode; Determining an optimal target room temperature of each part using each measured and calculated body temperature in the automatic mode; If it is not in the automatic mode, setting a room temperature of each of the received portions as the respective target room temperature; Determining whether the outside temperature is higher than the target room temperature of each seat; Operating an air conditioner for cooling if the outside temperature is higher than a target temperature of each of the seats; Stopping the air conditioner for heating when the outside air temperature is lower than the target temperature of each seat; And determining the rotational direction and the rotational speed of the blower with the respective room temperature and the respective target vehicle temperature, and controlling the blower accordingly.

However, the above-described prior art includes determining whether the driving mode is an automatic mode; Determining an optimal target room temperature of each part using each measured and calculated body temperature in the automatic mode; If it is not in the automatic mode, setting a room temperature of each of the received portions as the respective target room temperature; Since the outside air temperature is controlled to be cooled or heated depending on whether or not the seat temperature is higher than the target cabin temperature of each seat, for example, an office or a home where air conditioning is performed when the passenger does not reach the vehicle indoor temperature that the passenger feels comfortable. In the case of boarding the vehicle immediately, the body temperature, which is the temperature of the clothing surface of the occupant or the temperature of the body surface of the occupant, represents a temperature range different from that of the vehicle interior, thereby preventing normal air-conditioning and air conditioning.

In other words, the body temperature, which is the surface temperature of the passenger's clothing or the body surface of the occupant, may be compared with the air conditioning temperature in the office or at home, even if the vehicle is left in an air-conditioned office or home immediately in winter or summer, and is immediately parked or parked outside for a long time. However, the prior art does not consider such a difference, and the prior art simply determines the optimal target vehicle temperature by using the clothing surface temperature of the occupant or the body surface temperature of the occupant when boarding the vehicle, and compares the magnitude with the outside temperature. Since the air conditioning is performed after cooling / heating, the occupant has a problem that the occupant feels more uncomfortable, such as cold or heat, due to the high temperature warmth or the low temperature air discharged into the room during cooling.

The present invention was created to solve the above problems, and when the vehicle is parked or left outside for a long time in winter or summer, the interior temperature detected after the occupant rides the vehicle and starts the engine reaches the target temperature. After the cooling start mode or the heating start mode is executed, the cabin temperature can be set by combining the detection value of the surface temperature sensor and the air temperature sensor of the occupant, thereby performing air conditioning control considering the comfort of the occupant. The present invention provides a control method of an automotive air conditioning system.

In the control method of the vehicle air conditioner according to the present invention for achieving the above object, the step of detecting the respective detection value (Tincar, Tamb, Tir) through the air temperature sensor, outside air temperature sensor, occupant surface temperature sensor Wow; Determining whether the cooling start mode is entered or the heating start mode is entered; When it is determined to enter the cooling start mode or the heating start mode, the internal temperature sensor detection value Tincar is set to the interior temperature Tcabin so that the interior temperature reaches the set target temperature Ttwset. Performing a heating and cooling start-up mode in the vehicle interior; Determining whether the vehicle interior temperature Tcabin has reached the target temperature Ttwset after the air-conditioning startup mode execution step; When it is determined that the vehicle interior temperature Tcabin has reached the target temperature Ttwset, the vehicle interior temperature Tcabin is determined by detecting the occupant surface temperature sensor detection value Tir and the internal temperature sensor detection value. (Tincar) is set to a combined value to perform a normal air-conditioning mode of the vehicle interior.

According to the control method of the vehicle air conditioner according to the present invention, when the vehicle is parked or left outside for a long time in winter or summer, the occupant rides the vehicle and starts the engine until the detected interior temperature reaches the target temperature. After performing the cooling start mode or the heating start mode, the cabin temperature is set by combining the passenger's surface temperature sensor and the air temperature sensor's detection value, so that the air conditioning control considering the passenger's comfort can be performed. .

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a control block diagram for controlling the vehicle air conditioner according to the present invention, Figure 3 is a flow chart according to the control method of the vehicle air conditioner according to the present invention.

As shown in FIG. 2, the passenger's surface temperature sensor 20, the air temperature sensor 30, the outside air temperature sensor 40, and the evaporator passing side are shown in FIG. 2. It comprises an air temperature sensor 45, the controller 50 and the air conditioner (1).

Here, the air conditioner (1) has already been mentioned in the prior art with a conventional technique with reference to Figure 1, the description thereof will be omitted.

The occupant surface temperature sensor 20 may be an infrared sensor, for example, and serves to detect the surface temperature of the occupant.

In addition, the controller 50 receives data about the temperature detected from the occupant surface temperature sensor 20 and the air temperature sensor 30, the outside air temperature sensor 40, and the air temperature sensor 45 passing through the evaporator. The air conditioning apparatus 1 is controlled to perform cooling and heating of the vehicle interior.

Hereinafter, a control method for heating and cooling a vehicle indoors according to the present invention controlled by the controller 50 will be described with reference to the flowchart of FIG. 3.

As shown in FIG. 3, after the vehicle is turned on, the air temperature sensor 30, the outside air temperature sensor 40, and the occupant surface temperature sensor 20. Each of the detected values Tincar, Tamb, Tir, and Tev is detected through the air temperature sensor 45 at the evaporator passing side, and the detected value Tincar and the outside air temperature sensor 40 from the air temperature sensor 30 of the vehicle are detected. Comparing the detection value Tamb from to with the reference value, respectively, and comparing the detection value Tev from the evaporator passing air temperature sensor 45 with the reference value (S100).

Next, after performing the step (S100), it is determined whether the entry into the cooling start mode or entry condition to the heating start mode (S110).

Here, whether to determine whether to enter the cooling start mode or the entry to the heating start mode may correspond to the following conditions.

That is, the heating start mode entry condition is a case where the air temperature sensor detection value Tincar is lower than or equal to the reference value and the outside air temperature sensor detection value Tamb is lower than or equal to the reference value, for example, the bet temperature in winter (winter). It is determined whether the sensor detected value Tincar is equal to or less than the reference value (for example, 15 ° C) and whether the vehicle exterior temperature is equal to or less than the reference value (for example, 10 ° C).

As described above, when the air temperature sensor detection value Tincar and the outdoor air temperature sensor detection value Tamb are respectively equal to or less than the corresponding reference values (15 ° C and 10 ° C), it is determined that the heating start mode entry condition is performed.

Here, although the reference value is 15 ℃, 10 ℃ as an example, but not limited to this, it is noted that it can vary depending on the vehicle conditions.

Next, the cooling start mode entry condition is a case where the air temperature sensor detected value Tincar is equal to or greater than the reference value and the outside air temperature sensor detected value Tamb is equal to or greater than the reference value. It is determined whether the temperature sensor detected value Tincar is equal to or greater than the reference value (for example, 31 ° C.) and whether the temperature sensor detected value Tamb is equal to or greater than the reference value (for example, 30 ° C.).

As described above, when the air temperature sensor detected value Tincar and the outdoor air temperature sensor detected value Tamb are equal to or greater than the corresponding reference values 31 ° C. and 30 ° C., respectively, it is determined that the cooling start mode entry condition is performed.

Here, the reference value is 31 ℃, 30 ℃ as an example, but not limited to this, it will be noted that it may vary depending on the vehicle conditions.

On the other hand, as another embodiment of the cooling start mode entry condition, further comprises an evaporator passing air temperature sensor 45, the evaporator passing air temperature sensor detected value Tev is a reference value (for example 25 ℃ ~ 30 ℃) or more, and this reference value is not limited to this, it is noted that it may vary depending on the vehicle conditions.

Subsequently, the step 110 is performed to determine whether the heating start mode entry condition or the cooling start mode entry condition is one of the conditions, and a step of setting a target temperature Ttwset is performed.

Here, the target temperature (Ttwset) is preferably set on the basis of the set temperature input by the occupant, it is noted that the target temperature can be set differently the target value for each vehicle manufacturer.

Thereafter, the process proceeds to step S120, and then sets the current indoor temperature sensor detection value Tincar to the vehicle interior temperature Tcabin.

Next, setting the indoor temperature sensor detected value Tincar to the interior temperature Tcabin and performing the heating and cooling start mode in the interior of the vehicle so that the interior temperature Tcabin reaches a set target temperature Ttwset. Proceed. (S140)

Here, when the step (S140) is to perform the heating start mode in the vehicle interior, the air conditioning mode is switched to the deep mode for discharging air through the defrost vent 5 shown in FIG. By decelerating to the lower stage, the cold air of the unheated state is not discharged toward the foot of the occupant and the front face of the occupant, thereby minimizing the chill that the occupant feels. That is, the cold air is discharged at a slow speed toward the defrost vent 5 side, thereby minimizing the chill that the passenger feels.

On the other hand, if the step (S140) is to perform the cooling start mode in the vehicle interior, the air conditioning mode is switched to the floor mode for discharging air through the floor vent 7 shown in FIG. The step of decelerating to the lower stage, thereby minimizing the warmth felt by the occupant by preventing the hot air not discharged toward the front face of the occupant. That is, the hot air is discharged at a slow speed toward the floor vent 7 to minimize the warmth felt by the occupant.

Next, after the step S140 is performed, it is determined whether the vehicle interior temperature Tcabin has reached the target temperature Ttset.

Subsequently, when it is determined that the vehicle interior temperature Tcabin reaches the target temperature Ttwset, as a result of the determination in step S150, the vehicle interior temperature Tcabin is detected from the occupant surface temperature sensor. Performing a normal air-conditioning and heating mode of the vehicle interior in consideration of the passenger's comfort by setting the combination of the surface temperature sensor detection value (Tir) and the current air temperature sensor detection value (Tincar) of the occupant; S170)

At this time, when the normal heating and cooling mode is performed, the interior temperature Tcabin is calculated to satisfy the following equation, Tcabin = K × betting temperature sensor detection value Tincar + (1-K) × Tir. (S160)

Where K = coefficient.

On the other hand, if it is determined in the step (S110) that it is not the condition for entering the cooling start mode or the heating start mode, the following equation, Tcabin = K × internal temperature sensor detection value (Tincar) + (1-K) × Tir Carrying out the normal cooling and heating of the vehicle interior at the interior temperature (Tcabin) calculated by (S111).

In addition, the present invention is the discharge temperature discharged into the room by performing the heating and cooling start mode performing step (S140) and the normal cooling and heating performing step (S111) (S160) is the following equation, Td = Offset + K1 × (set temperature -23) Control to satisfy + K2 × (Tcabin) + K3 × (20-Tamb) -K4.

Where Td = indoor discharge temperature, Offset = constant, K1, K2 = set temperature gain, K3 = constant, K4 = solar radiation gain, Tcabin = indoor representative temperature, Tamb = outdoor temperature.

K4 is a solar radiation gain, which is set based on the solar radiation detected by a solar radiation sensor (not shown) that is normally installed in a vehicle.

As described above, according to the control method of the vehicle air conditioner according to the present invention, when the vehicle is parked or left outside for a long time in winter or summer, the occupant rides the vehicle to start the engine after starting the engine to start the heating start mode conditions If the air conditioner 1 is operated in a cooling start mode condition or a heating start mode condition, the air conditioner 1 is operated so as to feel comfortable enough within a short time. Then, the detected air temperature sensor detected value and the occupant are detected. By reflecting the surface temperature sensor detection value in combination, it is possible to perform normal heating and cooling of the vehicle interior in consideration of the passenger comfort.

That is, the present invention, unlike the prior art, the bet temperature sensor detection value prior to the occupant surface temperature sensor detection value is applied to perform the heating and cooling start mode of the car interior, then the bet temperature sensor detection value and occupant surface temperature sensor in the normal heating and cooling mode Since the combined value of the detected values is set to the interior temperature, hot or cold winds that are unpleasant to the winners are discharged even when the vehicle is parked or left unattended for a long time immediately outside the office or home where air conditioning is performed in winter or summer. It is possible to provide a comfortable air-conditioning environment to the occupant by preventing it.

1 is a cross-sectional view showing the internal configuration of a general vehicle air conditioner.

Figure 2 is a control block diagram for the vehicle indoor heating and cooling start control according to the present invention.

3 is a flow chart according to the control method of the vehicle air conditioner according to the present invention.

<Description of the symbols for the main parts of the drawings>

1: air conditioner

20: passenger surface temperature sensor

30: bet temperature

40: outside temperature sensor

50: controller

Claims (8)

Detecting respective detection values (Tincar, Tamb, and Tir) through an internal temperature sensor, an external temperature sensor, and a passenger surface temperature sensor; Determining whether the cooling start mode is entered or the heating start mode is entered; When it is determined to enter the cooling start mode or the heating start mode, the internal temperature sensor detection value Tincar is set to the interior temperature Tcabin so that the interior temperature reaches the set target temperature Ttwset. Performing a heating and cooling start-up mode in the vehicle interior;  Determining whether the vehicle interior temperature Tcabin has reached the target temperature Ttwset after the air-conditioning startup mode execution step; When it is determined that the vehicle interior temperature Tcabin has reached the target temperature Ttwset, the vehicle interior temperature Tcabin is determined by detecting the occupant surface temperature sensor detection value Tir and the internal temperature sensor detection value. (Tincar) is set to a combined value to perform a normal air-conditioning mode of the vehicle interior. The method according to claim 1, When performing the normal heating and cooling mode, The vehicle interior temperature (Tcabin) is calculated to satisfy the following equation, Tcabin = K × internal temperature sensor detection value (Tincar) + (1-K) × Tir. The method according to claim 1, The heating start mode entry condition is a control method of the vehicle air conditioner, characterized in that the air temperature sensor detection value (Tincar) is less than the reference value and the outside air temperature sensor detection value (Tamb) is less than the reference value. The method according to claim 1, The cooling start mode entry condition is a control method of the vehicle air conditioner, characterized in that the air temperature sensor detection value (Tincar) is more than the reference value and the outside air temperature sensor detection value (Tamb) is more than the reference value. The method according to claim 1, The cooling start mode entry condition further includes an evaporator passing side air temperature sensor, wherein the evaporator passing side air temperature sensor detected value Tev is greater than or equal to a reference value. The method according to claim 1, The control method of the vehicle air conditioner, characterized in that when performing the heating start mode in the cabin, the air conditioning mode is switched to the deep mode and the blower is decelerated to the lower stage. The method according to claim 1, And controlling the air conditioning mode to the floor mode and decelerating the blower to the lower stage when the cooling start mode is performed in the vehicle interior. The method according to any one of claims 1 to 7, The target temperature (Ttwset) is set based on the set temperature input by the occupant control method of the vehicle air conditioner.

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