KR100857713B1 - Auxiliary heating device in air conditioner for vehicle and method of controlling there of - Google Patents

Auxiliary heating device in air conditioner for vehicle and method of controlling there of Download PDF

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KR100857713B1
KR100857713B1 KR1020070058729A KR20070058729A KR100857713B1 KR 100857713 B1 KR100857713 B1 KR 100857713B1 KR 1020070058729 A KR1020070058729 A KR 1020070058729A KR 20070058729 A KR20070058729 A KR 20070058729A KR 100857713 B1 KR100857713 B1 KR 100857713B1
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South Korea
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temperature
voltage
electric
heater
battery
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KR1020070058729A
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Korean (ko)
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송호석
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주식회사 두원공조
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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
    • B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
    • B60H1/2215—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from electric heaters
    • B60H1/2218—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from electric heaters controlling the operation of electric heaters
    • 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
    • B60H1/0065—Control members, e.g. levers or knobs
    • 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
    • B60H1/00807—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 the input being a specific way of measuring or calculating an air or coolant temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries

Abstract

An auxiliary heating device of an air conditioner for a vehicle and a method for controlling the same are provided to prevent electric discharge of a battery by selectively driving a plurality of electric heaters in accordance with a condition of the battery. A method for controlling an auxiliary heating device of an air conditioner for a vehicle comprises the steps of: sensing a temperature of external air, a temperature of coolant of an engine, and the voltage of a battery when a user selects a heating mode(S10); turning on a priority order of electric heater first among a plurality of electric heaters when the sensed temperature of external air and the temperature of coolant is lower than set temperatures and the sensed voltage of the battery is higher than a set voltage(S50); and keeping turning on the priority order of electric heater for a predetermined time, re-sensing the voltage of the battery, turning on the following electric heater when the sensed voltage of the battery is higher than the set voltage(S100).

Description

차량용 공기조화기의 보조 난방장치 및 그 제어방법 {Auxiliary heating device in air conditioner for vehicle and method of controlling there of} Auxiliary heating device in air conditioner for vehicle and method of controlling there of}

도 1은 종래의 차량용 공기조화기의 보조 난방장치에서 복수의 히터를 제어하는 흐름을 보인 타이밍 챠트,1 is a timing chart showing a flow of controlling a plurality of heaters in the auxiliary heating device of a conventional vehicle air conditioner,

도 2는 본 발명의 바람직한 실시예에 따른 차량용 공기조화기의 보조 난방장치의 개략적인 블록 구성도,2 is a schematic block diagram of an auxiliary heating device of a vehicle air conditioner according to a preferred embodiment of the present invention;

도 3은 도 2에 도시된 제어부의 동작과정을 설명하기 위한 플로우챠트,3 is a flowchart for describing an operation of the controller illustrated in FIG. 2;

도 4는 본 발명에 따른 차량용 공기조화기의 보조 난방장치에서 복수의 히터를 제어하는 흐름을 보인 타이밍 챠트.4 is a timing chart showing a flow of controlling a plurality of heaters in the auxiliary heating device of the vehicle air conditioner according to the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

10: 키 입력부 20: 외기온도 감지부10: key input unit 20: outside temperature detection unit

30: 냉각수온 감지부 40: 배터리전압 감지부30: coolant temperature detection unit 40: battery voltage detection unit

50: 배터리 60: 제어부50: battery 60: control unit

H1, H2: 전기가열식 히터H1, H2: Electric Heaters

본 발명은 차량용 공기조화기의 보조 난방장치 및 그 제어방법에 관한 것으로, 보다 상세하게는 배터리의 충방전 성능 저하를 방지할 수 있는 차량용 공기조화기의 보조 난방장치 및 그 제어방법에 관한 것이다.The present invention relates to an auxiliary heating apparatus for a vehicle air conditioner and a control method thereof, and more particularly, to an auxiliary heating apparatus for a vehicle air conditioner capable of preventing a decrease in charge / discharge performance of a battery and a control method thereof.

일반적으로 차량용 공기조화기는, 외기 또는 내기를 선택하여 흡입하기 위해 설치된 흡기도어와, 흡기도어를 통해 흡입된 공기의 풍량을 조절하는 블로워와, 블로워에 의해 유입되는 공기의 온도를 낮추어 주는 증발기와, 블로워에 의해 유입되는 공기의 온도를 높여주는 히터코어를 포함하여 이루어진다. 또, 증발기를 통과한 공기 중에서 히터코어로 진행하는 공기의 비율을 변화시킴으로써 차내에 공급되는 공기의 온도를 조절하는 템프도어와, 템프도어에 의해 온도가 조절된 공기의 실내 토출방향을 절환하여 차량의 실내로 공급하는 모드도어를 포함하여 구성되어 있다.In general, an air conditioner for a vehicle includes: an air intake gear installed to select and inhale outside air or an internal air, a blower for adjusting the air volume of the air sucked through the intake air, an evaporator for lowering the temperature of the air introduced by the blower, It comprises a heater core to increase the temperature of the air introduced by the blower. In addition, by changing the ratio of air that passes through the evaporator to the heater core, the temp door for controlling the temperature of the air supplied to the vehicle and the indoor discharge direction of the air whose temperature is controlled by the temp door are switched to the vehicle. It is configured to include a mode door to supply the interior of the.

여기서, 히터코어는 엔진 내부를 순환하는 냉각수의 열을 이용하여 공기를 가열하는 난방장치이기 때문에, 엔진이 일정온도 이하인 시동 초기에는 냉각수의 온도가 낮아 공기를 충분히 가열할 수 없으므로 난방장치의 구실을 하지 못하는 단점이 있다.Here, since the heater core is a heating device that heats the air by using the heat of the cooling water circulating in the engine, since the temperature of the cooling water is not low enough to heat the air at the initial stage when the engine is lower than a predetermined temperature, it is difficult to sufficiently heat the heating device. There is a drawback to not doing it

특히, 겨울철과 같이 외부기온이 매우 낮아 냉각수의 온도가 더디게 상승하는 경우에는, 운전자 및 승객들이 상당한 시간동안 추위에 떨어야하는 불편을 겪어왔다.In particular, when the temperature of the coolant rises slowly because the outside temperature is very low, such as in winter, drivers and passengers have suffered from the cold for a considerable time.

이에 최근에는, 냉각수 온도가 낮은 겨울철의 시동 초기시간 동안에, 배터리 전압으로 전기가열식 히터에서 전열을 발생함으로써 히터코어를 보조하여 난방을 하는 보조 난방장치가 개발되어 보급되고 있는 추세이다.In recent years, during the initial start-up time in the winter when the coolant temperature is low, an auxiliary heating device for heating by assisting the heater core by generating electric heat from the electric heating heater with battery voltage has been developed and spread.

통상, 상기한 전기가열식 히터로는 PTC(Positive Temperature Coefficient) 소자가 주로 사용되는데, 이 PTC 소자는 가열능력이 높지 않기 때문에, 복수개의 전기가열식 히터를 채용하여 필요로하는 난방성능을 달성하고 있다.Generally, a PTC (Positive Temperature Coefficient) element is mainly used as the electric heating heater. Since the PTC element does not have high heating capability, a plurality of electric heating heaters are employed to achieve the required heating performance.

이러한 보조 난방장치는, 냉각수 온도가 낮은 겨울철의 시동 초기시간 동안 한시적으로 사용되는 목적에 맞게 외기온도와 엔진의 냉각수온을 고려하여 전기가열식 히터를 동작시키며, 배터리의 전압을 이용하는 특성 상 배터리의 전압도 함께 고려한다.The auxiliary heating device operates the electric heating heater in consideration of the outdoor temperature and the cooling water temperature of the engine for the purpose of being temporarily used during the initial start-up time of the low cooling water temperature, and the voltage of the battery is also due to the characteristics of the voltage of the battery. Consider together.

구체적으로는, 도 1을 참조하면 알 수 있듯이, 외기온도 및 냉각수온이 일정온도(예컨대, 10℃ 정도) 이하이고 배터리 전압이 일정레벨(예컨대, 13V 정도) 이상이면, 복수의 전기가열식 히터 중 우선순위의 전기가열식 히터(H1)에 배터리 전압을 인가하여 온(On) 시키고, 외기온도 또는 냉각수온이 일정온도를 초과하거나 배터리 전압이 일정레벨 미만이되면 우선순위의 전기가열식 히터(H1)를 오프(Off) 시킨다.Specifically, as can be seen with reference to Figure 1, if the outside temperature and cooling water temperature is below a certain temperature (eg, about 10 ℃) and the battery voltage is above a certain level (eg, about 13V), among the plurality of electric heating heater Applying a battery voltage to the priority electric heating heater (H1) to turn on (On), if the outside temperature or cooling water temperature exceeds a certain temperature or the battery voltage is below a certain level, the priority electric heating heater (H1) is turned on. Turn off.

복수의 전기가열식 히터 중 차순위의 전기가열식 히터(H2)는 상기 우선순위의 전기가열식 히터(H1)가 온되고 난 후 설정시간(예컨대, 15초 정도)이 경과하면 배터리 전압을 인가하여 온 시키고, 상기 우선순위의 전기가열식 히터(H1)가 오프되면 함께 오프시킨다.Among the plurality of electric heaters, the next-generation electric heater H2 is turned on by applying a battery voltage when a predetermined time (for example, about 15 seconds) has elapsed after the priority electric heater H1 is turned on. When the electric heater H1 of the priority is turned off, the electric heater is turned off together.

통상 차량의 배터리는 시동 전에 충전되어 있던 전압이 충분하지 않을 수 있고 특히 배터리 효율이 극도로 저하되는 겨울철에 배터리의 충전 잔량이 부족하기 쉬운데, 시동 초기에 복수의 전기가열식 히터를 차례로 모두 온시킬 경우 배터리에 부하가 크게 걸리고 전력소모가 극심해지면서 배터리의 충방전 성능이 현저히 저하될 수 있다.In general, a battery of a vehicle may not have sufficient voltage charged before starting, and especially in winter when the battery efficiency is extremely low, the remaining charge of the battery may be insufficient. As the battery is heavily loaded and the power consumption is extreme, the charge and discharge performance of the battery can be significantly reduced.

그런데, 종래의 보조 난방장치는, 우선순위의 전기가열식 히터를 온시키고 난 다음에는 배터리의 전압을 고려치 않은채 나머지 차순위의 전기가열식 히터를 차례로 모두 온 시키기 때문에, 배터리의 상태가 양호하지 않을 경우 배터리의 충방전 성능을 저하시키게 되는 문제점이 있었다.However, the conventional auxiliary heating device, after turning on the electric heater of the priority prior to turning on the remaining electric heaters of the next priority without considering the voltage of the battery, if the state of the battery is not good There was a problem that the charge and discharge performance of the battery is reduced.

이에 본 발명은 상기한 바와 같은 종래기술의 문제점을 해소하기 위해 안출한 것으로, 배터리의 상태에 따라 배터리에 주는 부하를 적절히 조절하여 배터리의 충방전 성능을 저하시키지 않게 할 수 있는 차량용 공기조화기의 보조 난방장치 및 그 제어방법을 제공하는 데에 그 목적이 있다.Accordingly, the present invention has been made to solve the problems of the prior art as described above, and according to the condition of the battery of the vehicle air conditioner that can not properly reduce the charge and discharge performance of the battery by appropriately adjusting the load on the battery The object is to provide an auxiliary heating device and a control method thereof.

상기 목적을 달성하기 위한 본 발명의 바람직한 실시예에 따른 차량용 공기조화기의 보조 난방장치는, 복수의 전기가열식 히터를 포함하고, 사용자의 난방 선택 키입력을 키신호로 변환하는 키 입력부와, 차량의 외기온도와 엔진의 냉각수온과 배터리 전압을 감지하는 감지수단과, 상기 키입력부로부터 난방 선택 키신호가 입력되고 상기 감지수단을 통해 감지되는 외기온도와 냉각수온이 각각 설정외기온도와 설정냉각수온 미만이고 배터리 전압이 설정전압 이상이면 복수의 전기가열식 히터 중 우선순위의 전기가열식 히터를 온시키고 이로부터 설정시간 후에 배터리 전압이 설정전압 이상이면 차순위의 전기가열식 히터를 온시키는 제어부를 포함하 는 것을 특징으로 한다.Auxiliary heating apparatus for a vehicle air conditioner according to a preferred embodiment of the present invention for achieving the above object, a plurality of electric heating heater, a key input unit for converting the user's heating selection key input into a key signal, and the vehicle Sensing means for sensing the ambient air temperature and the coolant temperature and the battery voltage of the engine, and a heating selection key signal is input from the key input unit, and the ambient temperature and the coolant temperature detected by the sensing means are less than the set ambient temperature and the set coolant temperature, respectively. And a controller for turning on the electric heater of the priority among the plurality of electric heaters when the voltage is higher than the set voltage, and turning on the electric heater of the next priority when the battery voltage is higher than the set voltage after the set time therefrom. .

상기 목적을 달성하기 위한 본 발명의 바람직한 실시예에 따른 차량용 공기조화기의 보조 난방장치 제어방법은, 복수의 전기가열식 히터를 포함하는 차량용 공기조화기의 보조 난방장치를 제어함에 있어서, 사용자가 난방을 선택하면 차량의 외기온도와 엔진의 냉각수온과 배터리 전압을 감지하는 스텝과, 상기 감지한 외기온도와 냉각수온이 각각 설정외기온도와 설정냉각수온 미만이고 배터리 전압이 설정전압 이상이면 복수의 전기가열식 히터 중 우선순위의 전기가열식 히터를 온시키는 스텝과, 상기 우선순위의 전기가열식 히터가 온되면 설정시간 후 배터리 전압을 다시 감지하여 설정전압 이상이면 차순위의 전기가열식 히터를 온시키는 스텝을 포함하는 것을 특징으로 한다.According to a preferred embodiment of the present invention, a method for controlling an auxiliary heating device for a vehicle air conditioner includes controlling a secondary heating device for a vehicle air conditioner including a plurality of electric heating heaters. Selecting the step of detecting the outside temperature of the vehicle, the coolant temperature and the battery voltage of the engine, and if the detected outside temperature and the coolant temperature is less than the set outside temperature and the set cooling water temperature, respectively, and the battery voltage is above the set voltage of the plurality of electric heating heater And a step of turning on the priority electric heating heater, and detecting the battery voltage again after a predetermined time when the priority electric heating heater is turned on and turning on the next priority electric heating heater when the priority voltage is higher than the setting voltage. do.

이하, 본 발명의 바람직한 실시예를 첨부된 도면을 참조하여 상세히 설명하기로 한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 2는 본 발명의 바람직한 실시예에 따른 차량용 공기조화기의 보조 난방장치의 개략적인 블록 구성도로서, 동 도면을 참조하면 알 수 있듯이, 본 발명은 키 입력부(10)와 외기온도 감지부(20)와 냉각수온 감지부(30)와 배터리 전압 감지부(40)와 배터리(50)와 제어부(60)와 복수의 전기가열식 히터(H1, H2)를 포함한다.FIG. 2 is a schematic block diagram of an auxiliary heating device for a vehicle air conditioner according to a preferred embodiment of the present invention. As can be seen from the drawing, the present invention provides a key input unit 10 and an outside air temperature sensing unit ( 20) and a coolant temperature detector 30, a battery voltage detector 40, a battery 50, a controller 60 and a plurality of electric heaters (H1, H2).

상기 키 입력부(10)는 사용자가 난방을 선택하는 키입력을 하면 그에 상응하는 키신호를 발생하여 제어부(60)로 입력하고, 상기 외기온도 감지부(20)는 차량 외부공기(외기)의 온도를 감지하고 그에 상응하는 감지신호를 발생하여 제어부(60)로 입력한다.When the user inputs a key for selecting heating, the key input unit 10 generates a corresponding key signal and inputs the same to the controller 60, and the outside temperature sensing unit 20 measures the temperature of the outside air of the vehicle. Detect and generate a corresponding detection signal and input it to the controller 60.

상기 냉각수온 감지부(30)는 엔진 내부를 순환하는 냉각수의 온도를 감지하고 그에 상응하는 감지신호를 발생하여 제어부(60)로 입력하며, 배터리(50)는 배터리 전압감지부(40)와 제어부(50) 및 복수의 전기가열식 히터(H1, H2)를 포함하여 차량의 각 부품에 전력을 공급한다.The coolant temperature detection unit 30 detects the temperature of the coolant circulating in the engine and generates a detection signal corresponding thereto to input the control unit 60, and the battery 50 is the battery voltage detector 40 and the control unit. Electric power is supplied to each component of the vehicle, including 50 and a plurality of electrically heated heaters H1 and H2.

상기 제어부(60)는 키 입력부(10)로부터 난방 선택 키신호가 입력되면 외기온도 감지부(20)와 냉각수온 감지부(30) 및 배터리 전압 감지부(40)로부터 입력되는 각각의 감지신호에 의해 외기온도와 냉각수온 및 배터리 전압을 감지한다.When the heating selection key signal is input from the key input unit 10, the control unit 60 is provided to the respective sensing signals input from the outside temperature sensor 20, the coolant temperature sensor 30, and the battery voltage detector 40. It detects ambient temperature, coolant temperature and battery voltage.

그리고, 제어부(60)는 감지된 외기온도와 냉각수온이 각각 설정외기온도(Ta)와 설정냉각수온(Tw) 미만이고 배터리 전압이 설정전압(V1) 이상이면 복수의 전기가열식 히터 중 우선순위의 전기가열식 히터(H1)를 온시키고 이로부터 설정시간 후에 배터리 전압이 설정전압(V2) 이상이면 차순위의 전기가열식 히터(H2)를 온시킨다.In addition, the controller 60 detects the priority of the plurality of electric heating heaters when the detected outside temperature and the cooling water temperature are less than the set outside temperature Ta and the set cooling water temperature Tw, respectively, and the battery voltage is higher than the set voltage V1. The heating heater H1 is turned on, and if the battery voltage is greater than or equal to the set voltage V2 after the set time therefrom, the next-order electric heating heater H2 is turned on.

또한, 제어부(60)는 외기온도가 상기 설정외기온도(Ta) 이상이 되거나 냉각수온이 설정냉각수온(Tw) 이상이 되거나 배터리 전압이 설정전압(V1) 미만이되면 우선순위의 전기가열식 히터(H1)를 오프시키고, 우선순위의 전기가열식 히터(H1)가 오프되면 차순위의 전기가열식 히터(H2)를 오프시킨다.In addition, the control unit 60 is a priority of the electric heating heater when the outside air temperature is above the set outside temperature (Ta) or the cooling water temperature is above the set cooling water temperature (Tw) or the battery voltage is below the set voltage (V1). When H1) is turned off and the priority electric heater H1 is off, the next-order electric heater H2 is turned off.

예컨대, 설정외기온도(Ta)와 설정냉각수온(Tw)는 설정하기에 따라 서로 동일한 값일 수도 있고 다른 값일 수도 있으며, 이는 본 발명의 실시자가 임의로 설정할 수 있다. 설정전압(V1)과 설정전압(V2)도 설정하기에 따라 서로 동일한 값일 수도 있고 다른 값일 수도 있으며, 이는 본 발명의 실시자가 임의로 설정할 수 있다.For example, the set outside temperature Ta and the set cooling water temperature Tw may be the same as or different from each other depending on the setting, which may be arbitrarily set by the practitioner of the present invention. The setting voltage V1 and the setting voltage V2 may also be the same as or different from each other, which may be arbitrarily set by the practitioner of the present invention.

상기 복수의 전기가열식 히터(H1, H2)는, 제어부(60)에 의해 인가되는 배터리 전압에 의해 전열을 발생하는 것으로, 우선순위의 전기가열식 히터(H1)와 차순위의 전기가열식 히터(H2)가 포함되어 있다.The plurality of electrically heated heaters H1 and H2 generate heat by the battery voltage applied by the controller 60, and the priority electrically heated heater H1 and the next-order electrically heated heater H2 are generated. Included.

상기 우선순위의 전기가열식 히터(H1)의 개수는 본 발명의 실시자가 임의로 설정할 수 있으며, 단수개일 수도 있고 복수개일 수도 있다. 마찬가지로, 상기 차순위의 전기가열식 히터(H2)의 개수 역시 본 발명의 실시자가 임의로 설정할 수 있으며, 단수개일 수도 있고 복수개일 수도 있다.The number of the electric heating heaters H1 of the above priority may be arbitrarily set by the practitioner of the present invention, and may be singular or plural. Similarly, the number of the next-order electric heating heater (H2) can also be arbitrarily set by the practitioner of the present invention, may be a singular or plural number.

예컨대, 상기 복수의 전기가열식 히터(H1, H2)로는 공지된 PTC 소자가 사용될 수 있다.For example, a known PTC element may be used as the plurality of electrically heated heaters H1 and H2.

이제 상기와 같이 구성된 본 발명의 동작과정을 첨부된 도면을 참조하여 설명하기로 한다.The operation of the present invention configured as described above will now be described with reference to the accompanying drawings.

도 3 및 도 4에 도시된 바와 같이, 키 입력부(10)로부터 난방 선택 키신호가 입력되면, 제어부(60)는 외기온도 감지부(20)와 냉각수온 감지부(30) 및 배터리 전압 감지부(40)로부터 입력되는 각각의 감지신호에 의해 외기온도와 냉각수온 및 배터리 전압을 각각 감지한다(S10).3 and 4, when the heating selection key signal is input from the key input unit 10, the control unit 60 controls the outside temperature sensor 20, the coolant temperature sensor 30, and the battery voltage detector. The ambient air temperature, the coolant temperature, and the battery voltage are respectively sensed by the respective detection signals input from the 40 (S10).

제어부(60)는, 감지된 외기온도를 설정외기온도(Ta)와 비교하고(S20), 감지된 냉각수온을 설정냉각수온(Tw)과 비교하며(S30), 감지된 배터리 전압을 설정전압(V1)과 비교한다(S40).The controller 60 compares the detected outside temperature with the set outside temperature Ta (S20), compares the detected coolant temperature with the set cooling water temperature Tw (S30), and compares the detected battery voltage with the set voltage ( V1) is compared (S40).

상기 스텝(S20~S40)에서의 비교결과, 외기온도가 설정외기온도(Ta)이하이고 냉각수온이 설정냉각수온(Tw) 이하이며 배터리 전압이 설정전압(V1) 이상이면, 제 어부(60)는 복수의 전기가열식 히터 중 우선순위의 전기가열식 히터(H1)에 배터리 전압을 인가하여 온시킨다(S50).As a result of the comparison in the steps S20 to S40, if the outside air temperature is lower than or equal to the set ambient temperature Ta, the cooling water temperature is lower than or equal to the set cooling water temperature Tw, and the battery voltage is higher than or equal to the set voltage V1, the control unit 60 In operation S50, a battery voltage is applied to an electric heating heater H1 having a priority among the plurality of electric heating heaters.

다음, 제어부(60)는 시간을 계수하여(S60), 설정시간(예컨대, 15초 정도)이 경과하면(S70), 다시 배터리 전압 감지부(40)로부터 입력되는 감지신호에 의해 배터리 전압을 감지한다(S80).Next, the controller 60 counts the time (S60), and when the set time (for example, about 15 seconds) elapses (S70), the controller 60 detects the battery voltage by the detection signal input from the battery voltage detector 40 again. (S80).

제어부(60)는 상기 스텝(S80)에서 감지된 배터리 전압을 설정전압(V2)과 비교하여(S90), 비교결과 배터리 전압이 설정전압(V2) 이상이면, 복수의 전기가열식 히터 중 차순위의 전기가열식 히터(H2)에 배터리 전압을 인가하여 온시킨다(S100).The controller 60 compares the battery voltage sensed in the step S80 with the set voltage V2 (S90), and when the comparison result shows that the battery voltage is equal to or greater than the set voltage V2, the second order electric power among the plurality of electric heaters The battery voltage is applied to the heated heater H2 and turned on (S100).

이후 제어부(60)는 초기 스텝(S10)으로 리턴하며, 외기온도가 상기 설정외기온도(Ta) 이상이 되거나 냉각수온이 설정냉각수온(Tw) 이상이 되거나 배터리 전압이 설정전압(V1) 미만이되면 우선순위의 전기가열식 히터(H1)를 오프시키고(S200), 우선순위의 전기가열식 히터(H1)가 오프되면 차순위의 전기가열식 히터(H2)를 오프시킨다(S300).After that, the controller 60 returns to the initial step S10, and the outside temperature becomes higher than the set outside temperature Ta or the coolant temperature becomes higher than the set cooling water temperature Tw or the battery voltage is lower than the set voltage V1. When the electric heater (H1) of the priority is turned off (S200), the electric heater (H2) of the next priority is turned off (S300) when the electric heater (H1) of the priority is off (S300).

이상에서 설명한 바와 같이, 본 발명에서는, 우선순위의 전기가열식 히터 뿐만 아니라 차순위의 전기가열식 히터에 대해서도 배터리의 전압에 따라 선택적인 가동을 한다. 즉, 본 발명은, 배터리의 잔량이 충분치 않아 모든 전기가열식 히터를 가동시키기 어려운 상황에서는 일부의 전기가열식 히터만을 가동하는 방식으로 배터리에 주는 부하를 적절히 조절함으로써, 배터리의 충방전 성능을 항상 양호한 상태로 유지할 수 있는 것이다.As described above, in the present invention, not only the priority electric heater but also the next electric heater are selectively operated according to the voltage of the battery. That is, according to the present invention, in a situation where it is difficult to operate all the electric heaters due to insufficient battery capacity, by appropriately adjusting the load on the battery by operating only a part of the electric heaters, the charge / discharge performance of the battery is always in a good state. It can be maintained.

상기에서 본 발명은 특정 실시예를 예시하여 설명하지만 본 발명이 상기 실 시예에 한정되는 것은 아니다. 당업자는 본 발명에 대한 다양한 변형, 수정을 용이하게 만들 수 있으며, 이러한 변형 또는 수정이 본 발명의 특징을 이용하는 한 본 발명의 범위에 포함된다는 것을 명심해야 한다.In the above, the present invention is illustrated by illustrating specific embodiments, but the present invention is not limited to the above embodiments. Those skilled in the art can easily make various changes and modifications to the present invention, and it should be noted that such variations or modifications are included within the scope of the present invention as long as the features of the present invention are used.

상술한 바와 같이 본 발명은, 복수의 전기가열식 히터를 배터리의 상태를 고려하여 선택적으로 가동함으로써, 배터리에 주는 부하를 적절히 조절한다.As described above, the present invention selectively adjusts the load on the battery by selectively operating the plurality of electric heating heaters in consideration of the state of the battery.

따라서, 본 발명을 이용하면, 배터리에 충전 잔량이 부족한 상태에서 모든 전기가열식 히터를 무리하게 가동하여 발생하는 배터리의 충방전 성능 저하를 미연에 방지할 수 있고, 이를 통해 시동 초기에 전기가열식 히터를 사용하면서도 배터리의 충방전 성능을 양호한 상태로 유지되게 할 수 있는 효과가 있다.Therefore, by using the present invention, it is possible to prevent the deterioration of the charge / discharge performance of the battery caused by excessively operating all the electric heaters in a state in which the battery has insufficient charge remaining, thereby preventing the electric heaters from being initially started. While in use, there is an effect that can maintain the charge and discharge performance of the battery in a good state.

Claims (5)

복수의 전기가열식 히터를 포함하는 차량용 공기조화기의 보조 난방장치에 있어서,In the auxiliary heating device of a vehicle air conditioner comprising a plurality of electric heating heater, 사용자의 난방 선택 키입력을 키신호로 변환하는 키 입력부;A key input unit for converting a user's heating selection key input into a key signal; 차량의 외기온도와 엔진의 냉각수온과 배터리 전압을 감지하는 감지수단; 및Sensing means for sensing the outside air temperature of the vehicle, the coolant temperature of the engine, and the battery voltage; And 상기 키입력부로부터 난방 선택 키신호가 입력되고 상기 감지수단을 통해 감지되는 외기온도와 냉각수온이 각각 설정외기온도와 설정냉각수온 미만이고 배터리 전압이 설정전압 이상이면 복수의 전기가열식 히터 중 우선순위의 전기가열식 히터를 온시키고 이로부터 설정시간 후에 배터리 전압이 설정전압 이상이면 차순위의 전기가열식 히터를 온시키는 제어부를 포함하는 것을 특징으로 하는 차량용 공기조화기의 보조 난방장치.When the heating selection key signal is input from the key input unit and the outside air temperature and the cooling water temperature detected by the sensing means are respectively less than the set outside temperature and the set cooling water temperature, and the battery voltage is higher than the set voltage, the priority electric heating type among the plurality of electric heating heaters And a control unit which turns on the heater and turns on the next-generation electric heating heater when the battery voltage is equal to or higher than the set voltage after the set time from the heater. 청구항 1에 있어서, 상기 우선순위의 전기가열식 히터를 온시키기 위한 조건의 설정전압과 상기 차순위의 전기가열식 히터를 온시키기 위한 조건의 설정전압은 서로 다른 것을 특징으로 하는 차량용 공기조화기의 보조 난방장치.The auxiliary heating apparatus of claim 1, wherein the set voltage of the condition for turning on the electric heater of the priority and the set voltage of the condition for turning on the electric heater of the next priority are different from each other. . 복수의 전기가열식 히터를 포함하는 차량용 공기조화기의 보조 난방장치 제어방법에 있어서,In the auxiliary heating control method of the vehicle air conditioner comprising a plurality of electric heating heater, 사용자가 난방을 선택하면 차량의 외기온도와 엔진의 냉각수온과 배터리 전압을 감지하는 스텝;Detecting the outside temperature of the vehicle, the coolant temperature of the engine, and the battery voltage when the user selects heating; 상기 감지한 외기온도와 냉각수온이 각각 설정외기온도와 설정냉각수온 미만이고 배터리 전압이 설정전압 이상이면 복수의 전기가열식 히터 중 우선순위의 전기가열식 히터를 온시키는 스텝; 및Turning on priority electric heating heaters among a plurality of electric heating heaters when the sensed outside temperature and cooling water temperature are respectively less than the setting outside temperature and the setting cooling water temperature and the battery voltage is higher than the setting voltage; And 상기 우선순위의 전기가열식 히터가 온되면 설정시간 후 배터리 전압을 다시 감지하여 설정전압 이상이면 차순위의 전기가열식 히터를 온시키는 스텝을 포함하는 것을 특징으로 하는 차량용 공기조화기의 보조 난방장치 제어방법.And detecting the battery voltage again after a set time when the electric heater of the priority is turned on and turning on the electric heater of the next priority when the electric voltage is higher than the set voltage. 청구항 3에 있어서, 외기온도가 상기 설정외기온도 이상이 되거나 냉각수온이 설정냉각수온 이상이 되거나 배터리 전압이 설정전압 미만이되면 상기 우선순위의 전기가열식 히터를 오프시키고, 상기 우선순위의 전기가열식 히터가 오프되면 상기 차순위의 전기가열식 히터를 오프시키는 것을 특징으로 하는 차량용 공기조화기의 보조 난방장치 제어방법.The electric heater of claim 3, wherein the electric heater of the priority is turned off when the outside air temperature is equal to or higher than the set ambient temperature, the coolant temperature is higher than the set cooling water temperature, or the battery voltage is lower than the set voltage. When the off is the secondary heating control method of the on-vehicle air conditioner, characterized in that for off the electric heater. 청구항 3 또는 청구항 4에 있어서, The method according to claim 3 or 4, 상기 우선순위의 전기가열식 히터를 온시키기 위한 조건의 설정전압과 상기 차순위의 전기가열식 히터를 온시키기 위한 조건의 설정전압은 서로 다른 것을 특징으로 하는 차량용 공기조화기의 보조 난방장치 제어방법.And a set voltage of a condition for turning on the electric heater of the priority and a set voltage of a condition for turning on the electric heater of the next priority is different from each other.
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