KR101245569B1 - Freezing prevention apparatus of evaporator for automotive vehicles air conditioning system - Google Patents

Freezing prevention apparatus of evaporator for automotive vehicles air conditioning system Download PDF

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KR101245569B1
KR101245569B1 KR1020060133503A KR20060133503A KR101245569B1 KR 101245569 B1 KR101245569 B1 KR 101245569B1 KR 1020060133503 A KR1020060133503 A KR 1020060133503A KR 20060133503 A KR20060133503 A KR 20060133503A KR 101245569 B1 KR101245569 B1 KR 101245569B1
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temperature
evaporator
freezing
surface portion
temperature sensor
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KR1020060133503A
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Korean (ko)
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KR20080059787A (en
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박성일
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한라공조주식회사
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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
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B60H1/3205—Control means therefor
    • B60H1/321—Control means therefor for preventing the freezing of a heat exchanger
    • 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
    • B60H1/00792—Arrangement of detectors
    • 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
    • B60H1/00971—Control systems or circuits characterised by including features for locking or memorising of control modes
    • 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
    • B60H1/00978—Control systems or circuits characterised by failure of detection or safety means; Diagnostic methods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F24F11/42—Defrosting; Preventing freezing of outdoor units
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
    • 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
    • B60H1/32—Cooling devices
    • B60H2001/3236—Cooling devices information from a variable is obtained
    • B60H2001/3255—Cooling devices information from a variable is obtained related to temperature
    • B60H2001/3261—Cooling devices information from a variable is obtained related to temperature of the air at an evaporating unit
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K2201/00—Application of thermometers in air-conditioning systems
    • G01K2201/02—Application of thermometers in air-conditioning systems in vehicles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

본 발명은 차량용 공조시스템의 증발기 결빙방지장치에 관한 것으로서, 증발기의 최저온도 표면에 맞추어 온도감지센서의 위치를 증발기의 종류별로 변경해야 하는 번거로움을 덜어주는 것을 목적으로 한다.The present invention relates to a device for preventing evaporator freezing of an air conditioner for a vehicle, and aims to reduce the trouble of changing the position of the temperature sensor according to the type of evaporator according to the lowest temperature surface of the evaporator.

이러한 목적을 달성하기 위하여 본 발명은, 압축기와 증발기 및 증발기의 표면에 수분이 결빙되는 것을 방지하기 위한 결빙방지장치를 포함하는 차량용 공조시스템에 있어서, 증발기의 검출표면부분의 온도를 감지하는 온도감지센서와; 미리 검측된 증발기의 최저온도 표면부분이 결빙온도에 도달했을 시점에 대응한 검출표면부분의 온도가 내장되어 있는 메모리부와; 온도감지센서로부터 감지된 검출표면부분의 온도가 메모리부에 내장된 온도 이하이면, 증발기의 최저온도 표면부분에 결빙현상이 발생된 것으로 판단하여 압축기를 오프(Off)시키는 제어부를 포함한다.In order to achieve the above object, the present invention, in the vehicle air conditioning system comprising a compressor and an ice preventing device for preventing water from freezing on the surface of the evaporator, temperature sensing for sensing the temperature of the detection surface portion of the evaporator A sensor; A memory unit in which the temperature of the detection surface portion corresponding to the time when the lowest temperature surface portion of the evaporator detected beforehand reaches the freezing temperature is built-in; If the temperature of the detection surface portion detected from the temperature sensor is less than the temperature embedded in the memory unit, it is determined that the freezing phenomenon has occurred in the lowest temperature surface portion of the evaporator includes a control unit for turning off the compressor (Off).

이러한 본 발명에 의하면, 증발기의 최저온도 표면에 맞추어 온도감지센서의 위치를 변경해야 하는 번거로움을 덜어줄 수 있는 효과가 있다. 또한, 온도감지센서의 위치를 증발기 종류별로 변경시키지 않아도 되므로, 규격화된 한 종류의 지지대로도 모든 종류의 증발기에 온도감지센서를 지지시킬 수 있으며, 따라서, 부품의 공용화율을 제고할 수 있는 효과가 있다.According to the present invention, there is an effect that can reduce the need to change the position of the temperature sensor in accordance with the lowest temperature surface of the evaporator. In addition, since the position of the temperature sensor does not need to be changed for each type of evaporator, the temperature sensor can be supported on all kinds of evaporators even with one type of standardized support, thereby improving the use rate of parts. There is.

Description

차량용 공조시스템의 증발기 결빙방지장치{FREEZING PREVENTION APPARATUS OF EVAPORATOR FOR AUTOMOTIVE VEHICLES AIR CONDITIONING SYSTEM}Evaporator freezing prevention device of vehicle air conditioning system {FREEZING PREVENTION APPARATUS OF EVAPORATOR FOR AUTOMOTIVE VEHICLES AIR CONDITIONING SYSTEM}

도 1은 본 발명에 따른 차량용 공조시스템의 증발기 결빙방지장치의 구성을 나타내는 도면,1 is a view showing the configuration of an evaporator freezing prevention device of a vehicle air conditioning system according to the present invention,

도 2는 증발기의 검출표면부분과 최저온도 표면부분에 대한 검출온도와 결빙온도의 관계를 나타내는 그래프,2 is a graph showing the relationship between the detection temperature and the freezing temperature for the detection surface portion and the lowest temperature surface portion of the evaporator;

도 3은 본 발명에 따른 증발기 결빙방지장치를 이용한 차량용 공조시스템 제어방법을 나타내는 플로우챠트이다.Figure 3 is a flow chart showing a vehicle air conditioning system control method using an evaporator freezing prevention apparatus according to the present invention.

♣ 도면의 주요부분에 대한 부호의 설명 ♣ DESCRIPTION OF REFERENCE NUMERALS

10: 증발기 20: 온도감지센서10: evaporator 20: temperature sensor

22: 지지대 24: 공조케이스22: support 24: air conditioning case

30: 압축기 40: 콘트롤러(Controller)30: Compressor 40: Controller

42: 메모리부 44: 제어부42: memory unit 44: control unit

·46: 설정부46: setting part

본 발명은 차량용 공조시스템의 증발기 결빙방지장치에 관한 것으로서, 보다 상세하게는, 증발기의 최저온도 표면에 맞추어 온도감지센서의 위치를 증발기의 종류별로 변경해야 하는 번거로움을 덜어줄 수 있는 차량용 공조시스템의 증발기 결빙방지장치에 관한 것이다.The present invention relates to an evaporator freezing prevention device of a vehicle air conditioning system, and more particularly, a vehicle air conditioning system that can reduce the hassle of having to change the position of the temperature sensor according to the type of evaporator according to the lowest temperature surface of the evaporator. It relates to an evaporator freezing prevention device of.

일반적으로, 자동차는 실내의 공기 온도를 적절히 조절하기 위한 공기조화시스템을 갖추고 있다. 이러한 공기조화시스템은, 기화된 냉매를 고온·고압의 가스로 압축하는 압축기와, 고온·고압의 냉매를 액화시키는 응축기와, 팽창밸브를 통과한 저온·저압의 냉매를 유입한 후, 주변의 공기와 열교환시키는 증발기를 포함한다. In general, automobiles are equipped with an air conditioning system for appropriately controlling the indoor air temperature. The air conditioning system includes a compressor for compressing a vaporized refrigerant into a gas of high temperature and high pressure, a condenser for liquefying a high temperature and high pressure refrigerant, and a low temperature and low pressure refrigerant passing through an expansion valve, and then the surrounding air. And an evaporator for heat exchange with.

그런데, 이러한 공조시스템은, 증발기를 통과하는 냉매의 온도가 너무 낮을 경우, 증발기의 표면에 수분이 결빙된다는 단점이 있으며, 이러한 단점 때문에 냉방효율이 저하된다는 문제점이 있다.However, such an air conditioning system has a disadvantage in that when the temperature of the refrigerant passing through the evaporator is too low, water freezes on the surface of the evaporator, and thus, there is a problem in that the cooling efficiency is lowered.

이를 감안하여 공조시스템에는, 증발기의 표면에 수분이 결빙되는 것을 방지하기 위한 결빙방지장치가 설치된다.In view of this, the air conditioning system is provided with an ice protection device for preventing water from freezing on the surface of the evaporator.

결빙방지장치는, 증발기의 표면에 온도감지센서를 설치한 다음, 온도감지센서로부터 입력되는 증발기의 표면 온도가 빙점(0℃)이하이면, 압축기를 일시적으로 정지시켜 증발기로의 냉매 흐름을 일시적으로 차단하는 구조로 되어있다.The anti-icing device installs a temperature sensor on the surface of the evaporator, and then temporarily stops the compressor by temporarily stopping the compressor when the surface temperature of the evaporator input from the temperature sensor is below the freezing point (0 ° C). It is structured to block.

이러한 결빙방지장치는, 증발기의 표면 온도가 빙점이하로 낮아져서 증발기의 표면에 수분의 결빙이 시작되면, 증발기로의 냉매 흐름을 일시적으로 차단함으로써, 증발기의 표면에 수분이 결빙되는 현상을 원천적으로 차단한다.Such an anti-icing device, when the surface temperature of the evaporator is lowered below the freezing point, begins to freeze moisture on the surface of the evaporator, by temporarily blocking the refrigerant flow to the evaporator, thereby blocking the phenomenon of water freezing on the surface of the evaporator. do.

한편, 이러한 결빙방지장치는, 증발기의 표면 온도를 감지하되, 가장 낮은 온도를 유지하는 부분을 감지하는 것이 중요하다. 왜냐하면, 가장 낮은 온도의 표면부터 수분의 결빙현상이 시작되기 때문이다.On the other hand, it is important to detect the surface temperature of the evaporator, but the portion that maintains the lowest temperature, such anti-freezing device. This is because water freezing starts from the lowest temperature surface.

가장 낮은 온도의 증발기 표면을 감지하는 방법으로서, 먼저, 증발기의 표면 온도를 측정하여 가장 낮은 온도의 표면을 찾아낸 다음, 가장 낮은 온도의 표면에 대응하여 온도감지센서를 설치하는 방법이 있다. 이때, 온도감지센서는 별도의 지지대에 지지된 상태에서 공조케이스에 고정적으로 설치된다.As a method of detecting the surface of the evaporator at the lowest temperature, first, the surface temperature of the evaporator is measured to find the surface of the lowest temperature, and then there is a method of installing a temperature sensor corresponding to the surface of the lowest temperature. At this time, the temperature sensor is fixedly installed in the air conditioning case in a state supported by a separate support.

그런데, 이러한 종래의 결빙방지장치는, 증발기의 종류마다 가장 낮은 온도의 표면 부분이 각기 다르므로, 증발기 종류마다 가장 낮은 온도의 표면(이하, "최저온도 표면"으로 통칭함) 부분을 실험적으로 조건별로(Trial and Error) 찾아내야 하고, 찾아낸 최저온도 표면 부분의 위치에 맞추어 온도감지센서를 설치해야 하므로, 온도감지센서를 지지하는 지지대의 길이를 종류별로 각기 다르게 제조해야 한다는 번거로움이 있다.By the way, since the surface part of the lowest temperature differs for every kind of evaporator, such a conventional freezing prevention apparatus experimentally conditions the part of the surface of the lowest temperature (henceforth a "lowest temperature surface") for every type of evaporator. Since it is necessary to find Trial and Error and to install the temperature sensor according to the location of the lowest temperature surface part, it is troublesome to manufacture the length of the support supporting the temperature sensor differently.

본 발명은 상기와 같은 종래의 문제점을 해결하기 위해 안출된 것으로서, 그 목적은, 온도감지센서의 위치를 증발기의 종류마다 변경시키지 않고서도 증발기의 최저온도 표면이 빙점이하로 저하되는 것을 인식할 수 있게 구성함으로써, 증발기의 최저온도 표면에 맞추어 온도감지센서의 위치를 변경해야 하는 번거로움을 덜어줄 수 있는 차량용 공조시스템의 증발기 결빙방지장치를 제공하는 데 있다.The present invention has been made to solve the above-mentioned conventional problems, the object is to recognize that the minimum temperature surface of the evaporator is lowered below the freezing point without changing the position of the temperature sensor for each type of evaporator The present invention provides a device for preventing evaporator freezing of an air conditioning system for a vehicle, which can reduce the need to change the position of the temperature sensor in accordance with the lowest temperature surface of the evaporator.

본 발명의 다른 목적은, 온도감지센서의 위치를 증발기 종류별로 변경시키지 않아도 되므로, 규격화된 한 종류의 지지대로도 모든 종류의 증발기에 온도감지센서를 지지시킬 수 있으며, 따라서, 부품의 공용화율을 제고할 수 있는 차량용 공조시스템의 증발기 결빙방지장치를 제공하는 데 있다.Another object of the present invention is that it is not necessary to change the position of the temperature sensor for each type of evaporator, so that even one type of standardized support can support the temperature sensor in all kinds of evaporators, thus increasing the commonization rate of the parts. The present invention provides an evaporator anti-icing device for a vehicle air conditioning system.

이러한 목적을 달성하기 위하여 본 발명은, 압축기와 증발기 및 상기 증발기의 표면에 수분이 결빙되는 것을 방지하기 위한 결빙방지장치를 포함하는 차량용 공조시스템에 있어서, 상기 증발기의 검출표면부분의 온도를 감지하는 온도감지센서와; 미리 검측된 상기 증발기의 최저온도 표면부분이 결빙온도에 도달했을 시점에 대응한 상기 검출표면부분의 온도가 내장되어 있는 메모리부와; 상기 온도감지센서로부터 감지된 검출표면부분의 온도가 상기 메모리부에 내장된 온도 이하이면, 상기 증발기의 최저온도 표면부분에 결빙현상이 발생된 것으로 판단하여 상기 압축기를 오프(Off)시키는 제어부를 포함하는 것을 특징으로 한다.In order to achieve the above object, the present invention, in the vehicle air conditioning system including a compressor and an evaporator and a freezing prevention device for preventing the water from freezing on the surface of the evaporator, detecting the temperature of the detection surface portion of the evaporator A temperature sensor; A memory unit in which the temperature of the detection surface portion corresponding to the point in time when the lowest temperature surface portion of the evaporator previously detected reaches the freezing temperature; And a controller configured to turn off the compressor when it is determined that freezing occurs at the lowest temperature surface portion of the evaporator when the temperature of the detection surface portion detected by the temperature sensor is less than the temperature embedded in the memory unit. Characterized in that.

이하, 본 발명에 따른 차량용 공조시스템의 증발기 결빙방지장치의 바람직한 실시예를 첨부한 도면에 의거하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings a preferred embodiment of the evaporator frost preventing device of the vehicle air conditioning system according to the present invention will be described in detail.

도 1은 본 발명에 따른 차량용 공조시스템의 증발기 결빙방지장치의 구성을 나타내는 도면이며, 도 2는 증발기의 검출표면부분과 최저온도 표면부분에 대한 검출온도와 결빙온도의 관계를 나타내는 그래프이다.1 is a view showing the configuration of an evaporator freezing prevention device of a vehicle air conditioning system according to the present invention, Figure 2 is a graph showing the relationship between the detection temperature and the freezing temperature for the detection surface portion and the lowest temperature surface portion of the evaporator.

먼저, 본 발명에 따른 결빙방지장치는, 증발기(10)의 표면 온도를 감지하기 위한 온도감지센서(20)를 구비한다.First, the frost preventing device according to the present invention, the temperature sensor 20 for detecting the surface temperature of the evaporator (10).

온도감지센서(20)는 지지대(22)의 끝부분에 지지되어 있으며, 지지대(22)는 공조케이스(24)에 고정적으로 설치된다.The temperature sensor 20 is supported at the end of the support 22, the support 22 is fixedly installed in the air conditioning case 24.

이러한 온도감지센서(20)는, 지지대(22)에 지지된 상태에서 공조케이스(24)에 고정적으로 설치되므로, 그 위치가 일정하게 고정된다. 따라서, 증발기(10)의 표면 중 어느 특정한 표면부분(A)에 대응되게 배치되며, 이에 따라 증발기(10)의 특정한 표면부분(A)(이하, 검출표면부분(A)이라 통칭함)의 온도를 검출하게 된다.Since the temperature sensor 20 is fixedly installed in the air conditioning case 24 in a state of being supported by the support 22, its position is fixed constantly. Accordingly, the temperature of the specific surface portion A (hereinafter, referred to as detection surface portion A) of the evaporator 10 is disposed so as to correspond to any specific surface portion A of the surface of the evaporator 10. Will be detected.

그리고 본 발명의 결빙방지장치는, 온도감지센서(20)로부터 입력된 신호를 처리하여 압축기(30)를 제어하는 콘트롤러(40)를 구비한다.In addition, the freezing prevention device of the present invention includes a controller 40 for controlling the compressor 30 by processing a signal input from the temperature sensor 20.

콘트롤러(40)는 메모리부(42)를 갖추고 있고, 이 메모리부(42)에는 증발기(10)의 최저온도 표면부분(B)이 빙점(0℃)에 도달했을 시점에 대응한 검출표면부분(A)의 온도(TA)가 "결빙온도(TB)"로 내장되어 있다.The controller 40 has a memory section 42, which has a detection surface section corresponding to the point in time when the lowest temperature surface section B of the evaporator 10 has reached the freezing point (0 ° C). The temperature T A of A ) is incorporated as the "freezing temperature T B ".

즉, 증발기(10)의 최저온도 표면부분(B)이 결빙온도(TB)에 도달했을 때에, 증발기(10)의 검출표면부분(A)의 온도가 2℃일 경우, 상기 2℃가 메모리부(42)에 "결빙온도"로 내장되어 있다는 것이다.That is, when the temperature of the detection surface portion A of the evaporator 10 is 2 ° C. when the lowest temperature surface part B of the evaporator 10 reaches the freezing temperature T B , the 2 ° C. is a memory. It is built in the section 42 at the "freezing temperature".

여기서, 증발기(10)의 최저온도 표면부분(B)은, 증발기(10)의 표면온도를 미리 측정하여 얻은 시험 데이터에 근거한다. 그리고 최저온도 표면부분(B)에 대응한 검출표면부분(A)의 온도 변화도 증발기(10)의 표면온도를 미리 측정하여 얻은 시험 데이터에 근거한다.Here, the lowest temperature surface part B of the evaporator 10 is based on the test data obtained by measuring the surface temperature of the evaporator 10 beforehand. The temperature change of the detection surface portion A corresponding to the lowest temperature surface portion B is also based on test data obtained by measuring the surface temperature of the evaporator 10 in advance.

그리고 콘트롤러(40)는 제어부(44)를 갖추고 있다. 제어부(44)는 온도감지센서(20)로부터 검출표면부분(A)의 온도가 입력되면, 입력된 검출표면부분(A)의 온도 와 메모리부(42)에 내장된 "결빙온도"를 비교하여, 입력된 검출표면부분(A)의 온도가 "결빙온도"이하일 경우, 현재 증발기(10)의 최저온도 표면부분(B)에 결빙현상이 발생된 것으로 판단하여 압축기(30)를 오프(Off)시킨다. 특히, 압축기(30)를 오프(Off)시킴으로써, 증발기(10)로의 냉매 흐름을 차단하며, 따라서, 증발기(10)의 표면에 수분이 결빙되는 것을 원천적으로 방지한다.The controller 40 is provided with a controller 44. When the temperature of the detection surface portion A is input from the temperature sensor 20, the controller 44 compares the temperature of the input detection surface portion A with the "freezing temperature" built into the memory 42. When the temperature of the input detection surface portion A is equal to or lower than the “freezing temperature”, the compressor 30 is turned off by determining that freezing has occurred at the lowest temperature surface portion B of the current evaporator 10. Let's do it. In particular, by turning off the compressor 30, it blocks the flow of refrigerant to the evaporator 10, and thus prevents water from freezing on the surface of the evaporator 10.

이러한 구성의 본 발명에 의하면, 증발기(10)의 최저온도 표면부분(B)과, 온도감지센서(20)가 설치되는 검출표면부분(A)의 온도편차(TGap)를 미리 검측한 다음, 검측된 데이터를 근거로 최저온도 표면부분(B)이 빙점이하의 온도로 낮아지는 것을 인식하는 구조이므로, 온도감지센서(20)의 위치를 증발기(10)의 종류마다 변경시키지 않아도 된다.According to the present invention having such a configuration, the temperature deviation T Gap of the lowest temperature surface portion B of the evaporator 10 and the detection surface portion A on which the temperature sensor 20 is installed is detected in advance, Based on the detected data, since the lowest temperature surface portion B is configured to recognize that the temperature falls below the freezing point, it is not necessary to change the position of the temperature sensor 20 for each type of evaporator 10.

또한, 온도감지센서(20)의 위치를 증발기(10)의 종류별로 변경시키지 않아도 되므로, 규격화된 한 종류의 지지대로도 모든 종류의 증발기(10)에 온도감지센서(20)를 지지시킬 수 있다. 따라서, 부품의 공용화율을 제고할 수가 있다.In addition, since the position of the temperature sensor 20 does not have to be changed for each type of evaporator 10, the temperature sensor 20 can be supported on all kinds of evaporators 10 even with one type of standardized support. . Therefore, the share ratio of components can be improved.

한편, 본 발명의 결빙방지장치는, 증발기(10)의 최저온도 표면부분(B)의 결빙온도(TB)와 메모리부(42)에 내장된 검출표면온도(A)의 온도(TA)와의 온도편차(TGap)를 변경할 수 있는 설정부(46)를 더 구비한다.On the other hand, in the freezing prevention device of the present invention, the freezing temperature (T B ) of the lowest temperature surface portion (B) of the evaporator 10 and the temperature (T A ) of the detection surface temperature (A) built into the memory unit 42. It further includes a setting unit 46 that can change the temperature deviation (T Gap ) of the.

설정부(46)는, 콘트롤러(40)와 전기적으로 연결되는 것으로, 최저온도 표면부분(B)의 결빙온도(TB)와 검출표면온도(A)의 온도(TA)와의 온도편차(TGap)를 변경할 수 있게 함으로써, 결빙방지장치의 작동시점을 제어할 수 있게 한다.The setting unit 46 is electrically connected to the controller 40 and has a temperature deviation T between the freezing temperature T B of the lowest temperature surface portion B and the temperature T A of the detection surface temperature A. By allowing the Gap ) to be changed, it is possible to control the operation of the icing prevention device.

다음으로, 이와 같은 구성의 증발기 결빙방지장치를 이용한 공조시스템의 제어방법을 도 1과 도 3을 참조하여 설명한다.Next, a control method of the air conditioning system using the evaporator freezing prevention device of such a configuration will be described with reference to FIGS.

먼저, 공조시스템이 온(On)된 상태에서(S101), 온도감지센서(20)는 증발기(10)의 검출표면부분(A)의 온도를 감지한다(S103).First, while the air conditioning system is on (S101), the temperature sensor 20 detects the temperature of the detection surface portion A of the evaporator 10 (S103).

그리고 검출표면부분(A)의 온도가 감지되면, 제어부(44)는 감지된 검출표면부분(A)의 온도가 메모리부(42)에 내장된 "결빙온도"이하인가를 판단한다(S105).When the temperature of the detection surface portion A is sensed, the controller 44 determines whether the detected temperature of the detection surface portion A is equal to or less than the "freezing temperature" built in the memory 42 (S105).

판단 결과, 검출표면부분(A)의 온도가 "결빙온도"이하이면, 현재 증발기(10)의 최저온도 표면부분(B)에서 결빙현상이 발생된 것으로 판단하여 압축기(30)를 오프(Off)시킨다(S107).As a result of determination, if the temperature of the detection surface portion A is equal to or lower than the "freezing temperature", it is determined that the freezing phenomenon has occurred at the lowest temperature surface portion B of the current evaporator 10 and the compressor 30 is turned off. (S107).

이와 같은 상태에서, 상기 압축기(30)가 오프되므로, 증발기(10)로 흐르는 냉매는 차단되며, 따라서, 증발기(10)의 표면에 수분이 결빙되는 현상이 방지된다.In this state, since the compressor 30 is turned off, the refrigerant flowing to the evaporator 10 is blocked, and thus a phenomenon in which water freezes on the surface of the evaporator 10 is prevented.

이상에서는 본 발명의 바람직한 실시예를 예시적으로 설명하였으나, 본 발명의 범위는 이와 같은 특정 실시예에만 한정되는 것은 아니며, 특허청구범위에 기재된 범주내에서 적절하게 변경 가능한 것이다.While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

이상에서 설명한 바와 같이, 본 발명에 따른 차량용 공조시스템의 증발기 결빙방지장치에 의하면, 온도감지센서의 위치를 증발기의 종류마다 변경시키지 않고서도 증발기의 최저온도 표면이 빙점이하로 저하되는 것을 감지하는 구조이므로, 증발기의 최저온도 표면에 맞추어 온도감지센서의 위치를 변경해야 하는 번거로움을 덜어줄 수 있는 효과가 있다.As described above, according to the evaporator freezing prevention device of the vehicle air conditioning system according to the present invention, the structure for detecting that the minimum temperature surface of the evaporator is lowered below the freezing point without changing the position of the temperature sensor for each type of evaporator Therefore, there is an effect that can reduce the need to change the position of the temperature sensor in accordance with the surface of the lowest temperature of the evaporator.

또한, 온도감지센서의 위치를 증발기 종류별로 변경시키지 않아도 되므로, 규격화된 한 종류의 지지대로도 모든 종류의 증발기에 온도감지센서를 지지시킬 수 있으며, 따라서, 부품의 공용화율을 제고할 수 있는 효과가 있다.In addition, since the position of the temperature sensor does not need to be changed for each type of evaporator, the temperature sensor can be supported on all kinds of evaporators even with one type of standardized support, thereby improving the use rate of parts. There is.

Claims (2)

압축기와 증발기 및 상기 증발기의 표면에 수분이 결빙되는 것을 방지하기 위한 결빙방지장치를 포함하는 차량용 공조시스템에 있어서,In a vehicle air conditioning system comprising a compressor and an evaporator and an ice preventing device for preventing water from freezing on the surface of the evaporator, 상기 증발기(10)의 검출표면부분(A)의 온도를 감지하기 위하여 지지대(20)에 의해 공조케이스(24)에 고정적으로 설치되는 온도감지센서(20)와;A temperature sensor 20 fixedly installed at the air conditioning case 24 by the support 20 to sense the temperature of the detection surface portion A of the evaporator 10; 미리 검측된 상기 증발기(10)의 최저온도 표면부분(B)이 결빙온도(TB)에 도달했을 시점에 대응한 상기 검출표면부분(A)의 온도(TA)가 내장되어 있는 메모리부(42)와;A memory unit in which the temperature T A of the detection surface portion A corresponding to the point in time when the lowest temperature surface portion B of the evaporator 10 previously detected reaches the freezing temperature T B ( 42); 상기 온도감지센서(20)로부터 감지된 검출표면부분(A)의 온도가 상기 메모리부(42)에 내장된 온도(TA) 이하이면, 상기 증발기(10)의 최저온도 표면부분(B)에 결빙현상이 발생된 것으로 판단하여 상기 압축기(30)를 오프(Off)시키는 제어부(44)를 포함하고,When the temperature of the detection surface portion A detected by the temperature sensor 20 is equal to or less than the temperature T A built in the memory 42, the surface of the evaporator 10 may be placed on the lowest temperature surface portion B of the evaporator 10. It is determined that the freezing phenomenon has occurred and includes a control unit 44 for turning off the compressor (30), 상기 증발기(10)의 최저온도 표면부분(B)의 결빙온도(TB)와 상기 증발기(10)의 검출표면온도(A)의 온도(TA)와의 온도편차(TGap)를 변경할 수 있는 설정부(46)를 더 포함하여 구성되어,The temperature deviation T Gap between the freezing temperature T B of the lowest temperature surface portion B of the evaporator 10 and the temperature T A of the detection surface temperature A of the evaporator 10 may be changed. It is configured to further include a setting unit 46, 온도감지센서(20)의 위치를 증발기 종류마다 변경시키지 않고서도 증발기의 최저온도 표면이 빙점 이하로 저하되는 것을 감지할 수 있는 것을 특징으로 하는 차량용 공조시스템의 증발기 결빙방지장치.Without changing the position of the temperature sensor 20 for each type of evaporator. Evaporator freezing prevention device of a vehicle air conditioning system, characterized in that it can detect that the lowest temperature surface falls below the freezing point. 삭제delete
KR1020060133503A 2006-12-26 2006-12-26 Freezing prevention apparatus of evaporator for automotive vehicles air conditioning system KR101245569B1 (en)

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Citations (3)

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Publication number Priority date Publication date Assignee Title
JPH05345512A (en) * 1992-06-16 1993-12-27 Suzuki Motor Corp Vehicle air conditioner
JP2004268769A (en) * 2003-03-10 2004-09-30 Denso Corp Refrigeration cycle apparatus for vehicle
KR20050006443A (en) * 2003-07-09 2005-01-17 한라공조주식회사 Temperature Sensor Fixing Structure and Operation Method for Evaporator of a Car

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05345512A (en) * 1992-06-16 1993-12-27 Suzuki Motor Corp Vehicle air conditioner
JP2004268769A (en) * 2003-03-10 2004-09-30 Denso Corp Refrigeration cycle apparatus for vehicle
KR20050006443A (en) * 2003-07-09 2005-01-17 한라공조주식회사 Temperature Sensor Fixing Structure and Operation Method for Evaporator of a Car

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