KR20000073046A - Drive controlling apparatus and the same method for air conditioner - Google Patents

Drive controlling apparatus and the same method for air conditioner Download PDF

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Publication number
KR20000073046A
KR20000073046A KR1019990016067A KR19990016067A KR20000073046A KR 20000073046 A KR20000073046 A KR 20000073046A KR 1019990016067 A KR1019990016067 A KR 1019990016067A KR 19990016067 A KR19990016067 A KR 19990016067A KR 20000073046 A KR20000073046 A KR 20000073046A
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South Korea
Prior art keywords
condenser
compressor
temperature
expansion valve
refrigerant
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KR1019990016067A
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Korean (ko)
Inventor
최득관
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구자홍
엘지전자 주식회사
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Priority to KR1019990016067A priority Critical patent/KR20000073046A/en
Publication of KR20000073046A publication Critical patent/KR20000073046A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/025—Motor control arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2116—Temperatures of a condenser
    • F25B2700/21163—Temperatures of a condenser of the refrigerant at the outlet of the condenser
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

PURPOSE: A device and a method for controlling the operation of an air conditioner are provided to maintain a cycle in an optimum state by recognizing temperatures of a condenser and a condenser outlet and controlling components of a compressor and so on. CONSTITUTION: A controller(60) receives a condensation temperature and a temperature of a condenser outlet respectively from a condenser temperature sensor(52a) and a condenser outlet temperature sensor(52b). The control unit controls a compressor(51), an expansion valve(54) and a fan(56). With an excessive cooling performance less than a reference state, an opening degree of the expansion valve is increased. Further, an operation frequency of the compressor and a speed of the fan are increased. With the excessive cooling performance over the reference state, the opening degree of the expansion valve is decreased. The operation frequency of the compressor and the speed of the fan are decreased.

Description

공기조화기의 운전제어 장치 및 방법 {Drive controlling apparatus and the same method for air conditioner}{Drive controlling apparatus and the same method for air conditioner}

본 발명은 공기조화기의 운전제어 장치 및 방법에 관한 것으로서, 특히 응축기의 온도와 그 출구온도를 감지하고 그 감지된 온도에 따라 과냉각도가 일정하도록 압축기와 팽창변과 실내외 팬을 제어하는 공기조화기의 운전제어 장치 및 방법에 관한 것이다.The present invention relates to an operation control apparatus and method of an air conditioner, and more particularly, an air conditioner that senses the temperature of the condenser and its outlet temperature and controls the compressor, the expansion valve, and the indoor / outdoor fan so that the supercooling degree is constant according to the sensed temperature. It relates to an operation control apparatus and method of the.

일반적으로, 공기조화기의 히트 펌프 사이클은 도 1에 도시된 압력-엔탈피(enthalpy) 선도와 같은 사이클을 겪게 된다. 즉, a점의 저온저압의 냉매는 압축기에서 압축되어 b점의 상태로 된 다음, 그 압력은 일정하게 유지하면서 응축기에서 응축되어 c점의 상태로 된 후, 팽창변에서 팽창되어 압력이 하강되면서 d점의 상태로 되고, 증발기에서 증발하여 a점의 상태로 되돌아오는 사이클을 겪게 된다. 여기서, 사이클의 최대효율을 얻는 방법은 환경에 맞는 최적의 상태로 토출과열도(SHd), 흡입과열도(SHs), 과냉각도(Sc)를 유지하는 것이다.In general, the heat pump cycle of an air conditioner undergoes a cycle such as the pressure-enthalpy diagram shown in FIG. 1. That is, the low temperature low pressure refrigerant at point a is compressed by a compressor to a point b, then condensed in a condenser to a point c while maintaining the pressure constant, and then expanded at an expansion valve to decrease pressure d. It is in the state of a point and undergoes a cycle which evaporates in an evaporator and returns to the state of a point. Here, a method of obtaining the maximum efficiency of the cycle is to maintain the discharge superheat degree SH d , the suction superheat degree SH s , and the supercooling degree S c in an optimal state suitable for the environment.

참조된 도면, 도 2는 종래기술에 의한 공기조화기의 개략적인 구성도이다.2 is a schematic configuration diagram of an air conditioner according to the prior art.

종래의 공기조화기는 저온저압의 냉매를 흡입하여 고온고압으로 압축시키는 압축기와, 상기 압축기에서 토출되는 고온고압의 냉매가 응축되는 응축기와, 상기 응축기에서 토출되는 냉매가 팽창되는 팽창밸브와, 상기 팽창밸브를 통과한 공기가 증발되는 증발기와, 상기 응축기 및 상기 증발기에 각각 설치된 팬으로 구성된다.Conventional air conditioners include a compressor for sucking low-temperature low-pressure refrigerant and compressing it at high temperature and high pressure, a condenser for condensing the high-temperature high-pressure refrigerant discharged from the compressor, an expansion valve for expanding the refrigerant discharged from the condenser, and the expansion And an evaporator through which the air passing through the valve is evaporated, and a fan installed in the condenser and the evaporator, respectively.

상기에서, 상기 증발기에서 저온저압으로 증발된 냉매는 상기 압축기로 흡입된 다음, 상기 압축기에서 고온고압으로 압축되어 토출되고, 상기 응축기에서 응축되어 액냉매의 상태로 되는 동시에 열을 외부로 방출하게 된다. 상기 응축기에서 응축된 냉매는 상기 팽창밸브를 통과하면서 팽창되어 상기 증발기에서 저온저압의 가스냉매로 증발하게 된다. 물론, 상기 증발기에서 외부로부터 열을 흡수하게 된다.The refrigerant evaporated at low temperature and low pressure in the evaporator is sucked into the compressor and then compressed and discharged at high temperature and high pressure in the compressor. . The refrigerant condensed in the condenser is expanded while passing through the expansion valve to evaporate to a low temperature low pressure gas refrigerant in the evaporator. Of course, the evaporator absorbs heat from the outside.

그러나, 종래의 공기조화기는 상기 실내외 팬의 풍량이 일정한 시스템에서는 토출과열도(SHd) 또는 흡입과열도(SHs)의 제어가 가능하지만, 상기 실내외 팬의 속도가 상기 압축기의 주파수 또는 냉난방의 부하에 따라 변동하게 되는 경우에는 상기 팽창밸브의 입구에서의 냉매상태가 과냉각으로 되지 않고 이상류 형태로 유입되어 과냉각도(Sc)가 일정하지 않게 되므로 상기 토출과열도(SHd)와 흡입과열도(SHs)가 매우 불규칙적으로 변동하여 제어가 불가능한 문제점이 있다.However, the conventional air conditioner can control the discharge superheat (SH d ) or the suction superheat (SH s ) in a system in which the air volume of the indoor / outdoor fan is constant, but the speed of the indoor / outdoor fan is dependent on the frequency of the compressor or the heating / cooling unit. If it varies with the load, because the refrigerant state at the inlet of the expansion valve flows into the form over current is not a super-cooling the super-cooling degree (S c) is not constant the discharging super-heating degree (SH d) and the absorption super-heating The degree SH s fluctuates very irregularly, which makes it impossible to control.

본 발명은 상기한 종래 기술의 문제점을 해결하기 위하여 안출된 것으로서, 응축기의 온도와 응축기 출구 온도를 파악하여 압축기 등의 구성요소들을 제어함으로써 사이클을 최적의 상태로 유지할 수 있는 공기조화기의 운전제어 장치 및 방법을 제공하는데 그 목적이 있다.The present invention has been made to solve the above-mentioned problems of the prior art, the operation control of the air conditioner that can keep the cycle in an optimal state by controlling the components such as the compressor by grasping the condenser temperature and the condenser outlet temperature It is an object of the present invention to provide an apparatus and method.

도 1은 냉동사이클의 압력-엔탈피 선도,1 is a pressure-enthalpy diagram of a refrigeration cycle,

도 2는 종래기술에 의한 공기조화기의 개략적인 구성도,2 is a schematic configuration diagram of an air conditioner according to the prior art,

도 3은 본 발명에 의한 공기조화기의 개략적인 구성도,3 is a schematic configuration diagram of an air conditioner according to the present invention;

도 4는 본 발명에 의한 공기조화기 운전제어방법의 블록도이다.4 is a block diagram of an air conditioner operation control method according to the present invention.

<도면의 주요 부분에 관한 부호의 설명><Explanation of symbols on main parts of the drawings>

51 : 압축기 52 : 응축기 52a : 응축기 온도센서51 compressor 52 condenser 52a condenser temperature sensor

52b : 응축기 출구온도센서 53, 56 : 팬52b: condenser outlet temperature sensor 53, 56: fan

54 : 팽창밸브 55 : 증발기 SHd: 토출과열도54: expansion valve 55: evaporator SH d : discharge superheat

SHs: 흡입과열도 Sc: 과냉각도SH s : Intake superheat degree S c : Supercooling degree

본 발명은 냉매가 고온고압으로 압축되는 압축기와, 상기 압축기에서 압축된 냉매가 응축되는 응축기와, 상기 응축기에서 응축된 냉매가 팽창되는 팽창변과, 상기 팽창변에서 팽창된 냉매가 증발되는 증발기와, 상기 응축기 및 증발기에 설치된 실내외 팬을 포함하는 공기조화기에서 있어서,The present invention provides a compressor in which a refrigerant is compressed at high temperature and high pressure, a condenser in which the refrigerant compressed in the compressor is condensed, an expansion valve in which the refrigerant condensed in the condenser is expanded, an evaporator in which the refrigerant expanded in the expansion valve is evaporated, In an air conditioner comprising an indoor and outdoor fan installed in the condenser and the evaporator,

상기 응축기의 온도를 감지하는 응축기 온도센서와, 상기 응축기의 출구 측에 설치되어 응축기 출구온도를 감지하는 응축기 출구온도 감지센서와, 상기 응축기 온도센서 및 상기 응축기 출구온도센서로부터 신호를 입력받아 상기 팽창변과 압축기와 실내외 팬을 제어하는 제어부를 포함하여 구성된 것을 특징으로 한다.A condenser temperature sensor detecting a temperature of the condenser, a condenser outlet temperature sensor installed at an outlet side of the condenser, and detecting a condenser outlet temperature, and receiving signals from the condenser temperature sensor and the condenser outlet temperature sensor And a controller for controlling the compressor and the indoor / outdoor fan.

여기서, 냉매가 고온고압으로 압축되는 압축기와, 상기 압축기에서 압축된 냉매가 응축되는 응축기와, 상기 응축기에서 응축된 냉매가 팽창되는 팽창변과, 상기 팽창변에서 팽창된 냉매가 증발되는 증발기와, 상기 응축기 및 증발기에 설치된 실내외 팬을 포함하는 공기조화기에서 있어서,Here, a compressor in which the refrigerant is compressed at high temperature and high pressure, a condenser in which the refrigerant compressed in the compressor is condensed, an expansion valve in which the refrigerant condensed in the condenser is expanded, an evaporator in which the refrigerant expanded in the expansion valve is evaporated, and the condenser And an indoor and outdoor fan installed in the evaporator,

상기 응축기의 온도와 상기 응축기의 출구온도를 감지하는 온도감지단계와, 상기 온도감지단계에서 감지된 온도에 따라 상기 압축기와 팽창변과 실내외 팬을 제어하는 제어단계를 포함하여 구성된 것을 특징으로 한다.And a temperature sensing step of sensing a temperature of the condenser and an outlet temperature of the condenser, and a controlling step of controlling the compressor, the expansion valve, and the indoor / outdoor fan according to the temperature detected in the temperature sensing step.

이하, 본 발명의 실시예를 참조된 도면을 참조하여 설명하면 다음과 같다.Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

우선 참조된 도면, 도 3은 본 발명에 의한 공기조화기의 개략적인 구성도이고, 도 4는 본 발명에 의한 공기조화기 운전제어방법의 블록도이다.3 is a schematic configuration diagram of an air conditioner according to the present invention, and FIG. 4 is a block diagram of an air conditioner operation control method according to the present invention.

본 발명에 의한 공기조화기는 도 3 및 도 4에 도시된 바와 같이 저온저압의 냉매를 흡입하여 고온고압으로 압축시키는 압축기(51)와, 상기 압축기(51)에서 토출된 냉매가 액냉매 상태로 응축되는 응축기(52)와, 상기 응축기(52)의 온도를 감지하는 응축기 온도센서(52a)와, 상기 응축기(52)의 출구에 설치되어 상기 응축기(52)의 출구온도를 감지하는 응축기 출구온도센서(52b)와, 상기 응축기(52)에서 응축된 냉매가 팽창되는 팽창밸브(54)와, 상기 팽창밸브(54)를 통과한 냉매가 저온저압으로 증발되는 증발기(55)와, 상기 응축기(52) 및 상기 증발기(55)에 설치된 팬(53, 56)과, 상기 응축기 온도센서(52a)와 응축기 출구온도센서(52b)로부터 신호를 입력받아 상기 압축기(51)와 팽창밸브(54)와 팬(53, 56)을 제어하는 제어부(60)로 구성된다.3 and 4, the air conditioner according to the present invention sucks the refrigerant of low temperature and low pressure and compresses it to high temperature and high pressure, and the refrigerant discharged from the compressor 51 is condensed in a liquid refrigerant state. The condenser 52, the condenser temperature sensor 52a for detecting the temperature of the condenser 52, and the condenser outlet temperature sensor installed at the outlet of the condenser 52 to detect the outlet temperature of the condenser 52 52b, an expansion valve 54 through which the refrigerant condensed in the condenser 52 expands, an evaporator 55 through which the refrigerant passing through the expansion valve 54 evaporates to a low temperature and a low pressure, and the condenser 52 ) And the fan (53, 56) installed in the evaporator (55), the condenser temperature sensor 52a and the condenser outlet temperature sensor 52b receives a signal from the compressor 51, expansion valve 54 and the fan And a control unit 60 for controlling the 53 and 56.

상기에서, 상기 제어부(60)는 상기 응축기 온도센서로(52a)부터 응축온도, 상기 응축기 출구온도센서(52b)로부터 응축기 출구온도를 각각 입력받고, 그에 따라 상기 압축기(51)와 팽창밸브(54)와 팬(53, 56)을 제어한다. 즉, 상기 응축기 출구온도에 해당하는 과냉각 상태를 파악하여 과냉각도(Sc)가 표준상태보다 작은 경우에는 상기 팽창밸브(54)의 개도를 증가시키고 상기 압축기(51)의 운전주파수를 상승시키며 상기 팬(53, 56)의 속도를 증가시킨다. 그리고, 과냉각도(Sc)가 표준상태보다 큰 경우에는 상기 팽창밸브(54)의 개도를 감소시키고 상기 압축기(51)의 운전주파수를 감소시키는 동시에 상기 팬(53, 56)의 속도를 감소시킨다.In the above, the control unit 60 receives the condenser outlet temperature from the condenser temperature sensor path 52a and the condenser outlet temperature from the condenser outlet temperature sensor 52b, respectively, and thus the compressor 51 and the expansion valve 54. ) And the fan (53, 56). That is, if the subcooling degree (S c ) is smaller than the standard state by determining the subcooling state corresponding to the outlet temperature of the condenser, the opening degree of the expansion valve (54) is increased and the operating frequency of the compressor (51) is increased. Increase the speed of fans 53 and 56. When the supercooling degree S c is larger than the standard state, the opening degree of the expansion valve 54 is decreased, and the operating frequency of the compressor 51 is reduced, and the speed of the fans 53 and 56 is reduced. .

이와 같이, 본 발명에 의한 공기조화기의 운전제어 장치 및 방법은 상기 응축온도와 응축기 출구온도를 감지하여 상기 압축기(51)와 팽창밸브(54)와 팬(53, 56)을 제어하여 사이클의 최대효율을 낼 수 있는 과냉각도(Sc)를 유지함으로써 사이클을 최적의 상태로 유지하는 동시에 안정화시킬 수 있는 효과를 제공한다.As such, the apparatus and method for controlling operation of an air conditioner according to the present invention detects the condensation temperature and the condenser outlet temperature to control the compressor 51, the expansion valve 54, and the fans 53, 56 to control the cycle. Maintaining the supercooling degree (S c ) for maximum efficiency provides the effect of stabilizing and maintaining the cycle in an optimal state.

Claims (2)

냉매가 고온고압으로 압축되는 압축기와, 상기 압축기에서 압축된 냉매가 응축되는 응축기와, 상기 응축기에서 응축된 냉매가 팽창되는 팽창변과, 상기 팽창변에서 팽창된 냉매가 증발되는 증발기와, 상기 응축기 및 증발기에 설치된 실내외 팬을 포함하는 공기조화기에서 있어서,A compressor in which the refrigerant is compressed at high temperature and high pressure, a condenser in which the refrigerant compressed in the compressor is condensed, an expansion valve in which the refrigerant condensed in the condenser is expanded, an evaporator in which the refrigerant expanded in the expansion valve is evaporated, and the condenser and the evaporator In an air conditioner including an indoor and outdoor fan installed in, 상기 응축기의 온도를 감지하는 응축기 온도센서와, 상기 응축기의 출구 측에 설치되어 응축기 출구온도를 감지하는 응축기 출구온도 감지센서와, 상기 응축기 온도센서 및 상기 응축기 출구온도센서로부터 신호를 입력받아 상기 팽창변과 압축기와 실내외 팬을 제어하는 제어부를 포함하여 구성된 것을 특징으로 하는 공기조화기의 운전제어 장치.A condenser temperature sensor detecting a temperature of the condenser, a condenser outlet temperature sensor installed at an outlet side of the condenser, and detecting a condenser outlet temperature, and receiving signals from the condenser temperature sensor and the condenser outlet temperature sensor And a control unit for controlling the compressor and the indoor / outdoor fan. 냉매가 고온고압으로 압축되는 압축기와, 상기 압축기에서 압축된 냉매가 응축되는 응축기와, 상기 응축기에서 응축된 냉매가 팽창되는 팽창변과, 상기 팽창변에서 팽창된 냉매가 증발되는 증발기와, 상기 응축기 및 증발기에 설치된 실내외 팬을 포함하는 공기조화기에서 있어서,A compressor in which the refrigerant is compressed at high temperature and high pressure, a condenser in which the refrigerant compressed in the compressor is condensed, an expansion valve in which the refrigerant condensed in the condenser is expanded, an evaporator in which the refrigerant expanded in the expansion valve is evaporated, and the condenser and the evaporator In an air conditioner including an indoor and outdoor fan installed in, 상기 응축기의 온도와 상기 응축기의 출구온도를 감지하는 온도감지단계와, 상기 온도감지단계에서 감지된 온도에 따라 상기 압축기와 팽창변과 실내외 팬을 제어하는 제어단계를 포함하여 구성된 것을 특징으로 하는 공기조화기의 운전제어 방법.A temperature sensing step of sensing the temperature of the condenser and the outlet temperature of the condenser, and a control step of controlling the compressor, the expansion valve, and the indoor / outdoor fan according to the temperature detected in the temperature sensing step. Operation control method of machine.
KR1019990016067A 1999-05-04 1999-05-04 Drive controlling apparatus and the same method for air conditioner KR20000073046A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100748519B1 (en) 2005-02-26 2007-08-13 엘지전자 주식회사 Second-refrigerant pump driving type air conditioner
KR20200063472A (en) * 2018-11-28 2020-06-05 (주)퓨처시스텍 An Apparatus for Controlling an Operation of a Refrigerating Vehicle Based on Detecting a Temperature and a Pressure and the Method for the Same
KR20220168065A (en) * 2021-06-15 2022-12-22 에이치에스테크 주식회사 Air conditioner without starting capable of multi-stage control

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100748519B1 (en) 2005-02-26 2007-08-13 엘지전자 주식회사 Second-refrigerant pump driving type air conditioner
KR20200063472A (en) * 2018-11-28 2020-06-05 (주)퓨처시스텍 An Apparatus for Controlling an Operation of a Refrigerating Vehicle Based on Detecting a Temperature and a Pressure and the Method for the Same
KR20220168065A (en) * 2021-06-15 2022-12-22 에이치에스테크 주식회사 Air conditioner without starting capable of multi-stage control

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