KR100429985B1 - Operation method of refrigerating cycle for heat pump air conditioner, for improving reliability of compressor by operating the same when oil is sufficiently supplied - Google Patents

Operation method of refrigerating cycle for heat pump air conditioner, for improving reliability of compressor by operating the same when oil is sufficiently supplied Download PDF

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Publication number
KR100429985B1
KR100429985B1 KR1019970008306A KR19970008306A KR100429985B1 KR 100429985 B1 KR100429985 B1 KR 100429985B1 KR 1019970008306 A KR1019970008306 A KR 1019970008306A KR 19970008306 A KR19970008306 A KR 19970008306A KR 100429985 B1 KR100429985 B1 KR 100429985B1
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South Korea
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compressor
air conditioner
oil
operating
heat pump
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KR1019970008306A
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Korean (ko)
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KR19980073161A (en
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유윤호
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엘지전자 주식회사
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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
    • 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
    • F25B30/00—Heat pumps
    • F25B30/02—Heat pumps of the compression type
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/31—Low ambient temperatures

Abstract

PURPOSE: An operation method of a refrigerating cycle for a heat pump air conditioner is provided to make the operation of a compressor smooth by making oil discharged from the compressor and taken into a cycle flow into the compressor quickly. CONSTITUTION: An operation method of a refrigerating cycle for a heat pump air conditioner comprises a step of operating by an air-conditioning mode to make oil of a compressor flow into an outdoor heat exchanger for predetermined time by operating a four-way valve when the outdoor temperature becomes set temperature of making the viscosity of oil filled in the compressor high, in starting heating operation, and a step of operating by a heating mode by operating the four-way valve after predetermined time. The refrigerating cycle comprises the compressor, the four-way valve, the outdoor heat exchanger, an expansion mechanism, and an indoor heat exchanger.

Description

히트펌프 에어콘용 냉동사이클장치의 운전방법Operation method of refrigeration cycle device for heat pump air conditioner

본 발명은 히트펌프 에어콘용 냉동사이클장치의 운전방법에 관한 것으로, 특히 압축기에서 토출되어 사이클내로 유입된 오일이 신속하게 압축기내로 유입되도록 하여 압축기의 운전을 원활하게 이루어질 수 있도록 한 히트펌프 에어콘용 냉동사이클장치의 운전방법에 관한 것이다.The present invention relates to a method of operating a refrigeration cycle device for a heat pump air conditioner, and particularly, a refrigeration for a heat pump air conditioner so that the oil discharged from the compressor and introduced into the cycle can be quickly introduced into the compressor to facilitate the operation of the compressor. It relates to a method of operating a cycle device.

일반적인 냉동사이클장치는, 도1 에 도시한 바와 같이, 저온저압의 기체상태의 냉매를 고온고압의 기체상태 냉매로 변화시키는 압축기(1)와, 상기 압축기(1)에서 변화된 고온고압의 기체상태의 냉매를 고온고압의 액체상태의 냉매로 변화시키는 응축기(2)와, 상기 응축기(2)에서 변화된 고온고압의 액체냉매를 저온저압의 액체냉매로 변화시키는 팽창기구(3)와, 상기 팽창기구(3)에서 변화된 저온저압의 액체상태의 냉매를 기체상태로 변화시키면서 외부의 열을 흡수하는 증발기(4)로 구성된다. 그리고 각 구성요소들은 냉매관에 의해 연결되어 있다.As shown in FIG. 1, a general refrigeration cycle apparatus includes a compressor (1) for converting a gaseous refrigerant of low temperature and low pressure into a gaseous state refrigerant of high temperature and high pressure, and a gaseous state of high temperature and high pressure changed in the compressor (1). A condenser (2) for changing the refrigerant into a liquid refrigerant at high temperature and high pressure, an expansion mechanism (3) for changing the high temperature and high pressure liquid refrigerant changed in the condenser (2) into a low temperature low pressure liquid refrigerant, and the expansion mechanism ( It consists of an evaporator (4) which absorbs external heat while changing the liquid refrigerant at low temperature and low pressure changed in 3) into a gaseous state. Each component is connected by a refrigerant pipe.

상기 냉동사이클장치는 냉장고나 공기조화기 등에 적용되며, 증발기(4)에서 외부의 열을 흡수하는 것과 응축기(2)에서 외부에 열을 방출하는 것을 이용하여 식품을 신선하게 보관하거나 실내를 냉/난방시켜 실내환경을 쾌적하게 유지하게 된다.The refrigerating cycle device is applied to a refrigerator or an air conditioner, and the like by storing the fresh food or cooling the room by absorbing the heat from the evaporator (4) and releasing heat to the outside from the condenser (2). Heating keeps the indoor environment comfortable.

도 2는 상기 냉동사이클장치를 응용한 히트펌프 에어콘용 냉동사이클장치를 도시한 것으로, 이에 도시한 바와 같이, 히트펌프용 냉동사이클장치는 압축기(1)에 이어 사방변(5)이 연결되고 이 사방변(5)의 일측에 연결되어 실외측 열교환기(2;응축기)가 연결되며 이 실외측 열교환기(2)에 이어 팽창기구(3)이 연결되고 이 팽창기구(3)에 이어 실내측 열교환기(4; 증발기)가 연결되며 이 실내측 열교환기(4)는상기 사방변(5)의 다른 일측에 연결되며 상기 사방변(5)의 또다른 일측은 압축기 (1)와 연결되어 이루어진다.2 illustrates a refrigeration cycle apparatus for a heat pump air conditioner using the refrigeration cycle apparatus. As shown in the drawing, a refrigeration cycle apparatus for a heat pump is connected to a four-sided side 5 of the compressor 1 after the compressor 1. It is connected to one side of the four sides (5) is connected to the outdoor heat exchanger (2; condenser), the expansion device (3) is connected to the outdoor heat exchanger (2), followed by the expansion device (3) A heat exchanger 4 (evaporator) is connected and the indoor heat exchanger 4 is connected to the other side of the four sides 5 and another side of the four sides 5 is connected to the compressor 1. .

또한 상기 실외측 열교환기(2)의 측부에는 실외팬(6)이 설치되고, 실내측 열교환기(4)의 측부에는 실내팬(7)이 설치되어 있다.In addition, an outdoor fan 6 is provided on the side of the outdoor heat exchanger 2, and an indoor fan 7 is provided on the side of the indoor heat exchanger 4.

상기한 바와 같은 히트펌프용 냉동사이클장치는 사방변(5)의 방향을 변환시키면서 실내에 설치되는 실내측 열교환기(4;증발기)의 역할을 변환시켜 실내를 냉/난방시키게 된다.As described above, the refrigeration cycle apparatus for the heat pump converts the role of the four sides 5 to change the role of the indoor side heat exchanger 4 installed in the room to cool / heat the room.

한편, 상기 냉동사이클장치는 인가되는 전원에 의해 압축기(1)가 작동함에 따라 운전하게 되는데, 상기 압축기(1)는 밀폐용기 내부에 구동력을 발생시키는 전동기구부와 상기 구동력을 전달받아 냉매가스를 압축시키는 압축기구부를 포함하여 구성되며, 내부에는 슬라이딩부분에 윤활작용을 하는 오일이 채워져 있다. 상기 오일은 압축기(1)의 기동시 냉매와 함께 대부분 압축기(1)내를 빠져나가 사이클을 순환한 후 다시 압축기(1)내로 회수되는데, 회수된 오일의 일부는 압축기(1)내에 남아 냉각 및 윤활작용을 하게 된다.On the other hand, the refrigeration cycle apparatus is driven as the compressor (1) is operated by the applied power, the compressor (1) is a power mechanism for generating a driving force in the sealed container and the driving force is received to compress the refrigerant gas It is configured to include a compression mechanism to the inside, the oil is lubricating the sliding portion is filled. The oil, with the refrigerant at the start of the compressor 1, mostly exits the compressor 1 and circulates through the cycle, and then is recovered into the compressor 1 again. Some of the recovered oil remains in the compressor 1 for cooling and Will be lubricated.

그러나 상기 히트펌프 에어콘용 냉동사이클장치는 외기온이 낮을 때 오일의 점도가 높아져 운전개시 후 냉매와 함께 압축기(1)에서 토출된 오일이 사이클을 순환하고 다시 압축기(1)내로 회수되는 시간이 외기온이 높을 때보다 배가 소요됨으로써 압축기(1)내에 오일이 부족한 상태에서 운전하는 시간이 길어지게 되어 압축기(1)의 신뢰성이 저하되는 단점이 있었다.However, the refrigeration cycle device for the heat pump air conditioner has a high viscosity of the oil when the outside air temperature is low, so that the oil discharged from the compressor 1 together with the refrigerant circulates the cycle after the operation is started and the outside air temperature is recovered to the compressor 1 again. Since the ship takes longer than the high time, the operation time in a state in which oil is insufficient in the compressor 1 becomes long, and thus the reliability of the compressor 1 is deteriorated.

따라서 본 발명의 목적은 압축기에서 토출되어 사이클내로 유입된 오일이 신속하게 압축기내로 유입되도록 하여 압축기의 운전을 원활하게 이루어질 수 있도록 한 히트펌프 에어콘용 냉동사이클장치의 운전방법을 제공함에 있다.Accordingly, an object of the present invention is to provide an operation method of a refrigeration cycle apparatus for a heat pump air conditioner, which allows the oil discharged from a compressor to flow into a compressor to be introduced into the compressor quickly so as to smoothly operate the compressor.

도 1은 일반적인 냉동사이클장치의 구성을 도시한 개략도,1 is a schematic view showing the configuration of a typical refrigeration cycle apparatus,

도 2는 일반적인 히트펌프 에어콘용 냉동사이클장치의 구성을 개략적으로 도시한 개략도,Figure 2 is a schematic diagram schematically showing the configuration of a refrigeration cycle device for a general heat pump air conditioner,

도 3은 본 발명의 히트펌프 에어콘용 냉동사이클장치의 운전방법을 도시한 흐름도,3 is a flowchart illustrating a method of operating a refrigeration cycle apparatus for a heat pump air conditioner of the present invention;

도 4는 종래 운전방법으로 운전한 상태에서 시간에 따른 압축기내의 오일량 변화를 도시한 그래프,4 is a graph showing a change in the amount of oil in the compressor with time in a state of operation in the conventional operation method,

도 5는 본 발명의 운전방법으로 운전시 압축기내의 오일양 변화를 도시한 그래프.5 is a graph showing a change in the amount of oil in the compressor during operation in the operating method of the present invention.

(도면의 주요 부분에 대한 부호의 설명)(Explanation of symbols for the main parts of the drawing)

1 ; 압축기 2 ; 실외측 열교환기One ; Compressor 2; Outdoor side heat exchanger

3 ; 팽창기구 4 ; 실내측 열교환기3; Expansion mechanism 4; Indoor side heat exchanger

5; 사방변5; All sides

상기한 바와 같은 본 발명의 목적을 달성하기 위하여 압축기, 사방변, 실외측 열교환기, 팽창기구, 실내측 열교환기를 포함하여 구성되는 히트펌프 에어콘용 냉동사이클장치에 있어서, 난방운전 기동시 실외 온도가 압축기내부에 채워지는 오일의 점도을 높게 하는 설정온도 상태가 될 경우 사방변을 조작하여 설정 시간동안 압축기의 오일이 실외측 열교환기로 유입되도록 냉방모드로 운전하는 단계와, 설정시간 후 사방변을 조작하여 난방모드로 운전하는 단계로 진행됨을 특징으로 하는 히트펌프 에어콘용 냉동사이클장치의 운전방법이 제공된다.In order to achieve the object of the present invention as described above, in the refrigeration cycle apparatus for a heat pump air conditioner comprising a compressor, a four-sided, an outdoor side heat exchanger, an expansion mechanism, an indoor side heat exchanger, the outdoor temperature at the start of heating operation is When the temperature reaches the set temperature to increase the viscosity of the oil filled in the compressor to operate the four sides to operate the cooling mode so that the oil of the compressor flows into the heat exchanger on the outside for a set time, and the four sides after the set time There is provided a method of operating a refrigeration cycle apparatus for a heat pump air conditioner, characterized in that the step of operating in a heating mode.

상기 설정온도는 영하 5℃이하로 함을 특징으로 하는 히트펌프 에어콘용 냉동사이클장치의 운전방법이 제공된다.Provided is a method of operating a refrigeration cycle apparatus for a heat pump air conditioner, wherein the set temperature is below 5 ° C. or less.

이하, 본 발명의 히트펌프 에어콘용 냉동사이클장치의 운전방법을 첨부도면에 도시한 실시예에 따라 설명하면 다음과 같다.Hereinafter, the operation method of the refrigeration cycle apparatus for a heat pump air conditioner of the present invention will be described according to the embodiment shown in the accompanying drawings.

상기 히트펌프 에어콘용 냉동사이클장치의 운전방법은, 도 3에 도시한 바와 같이, 난방운전 기동시 실외 온도가 압축기(1)내부에 채워지는 오일의 점도을 높게 하는 설정온도 상태가 될 경우 사방변(5)을 조작하여 설정 시간동안 압축기(1)의 오일이 실외측 열교환기(2)로 유입되도록 냉방모드로 운전하는 단계와, 설정시간 후 사방변(5)을 조작하여 난방모드로 운전하는 단계로 진행된다.The operation method of the refrigeration cycle apparatus for the heat pump air conditioner, as shown in Figure 3, when the outdoor temperature at the start of heating operation is set temperature condition to increase the viscosity of the oil filled in the compressor (1) 5) operating in the cooling mode so that the oil of the compressor (1) flows into the outdoor heat exchanger (2) during the set time, and operating in the heating mode by operating the four sides (5) after the set time Proceeds.

상기 설정온도는 약 영하 5℃이하로 함이 바람직하고, 상기 설정시간은 약 1분정도로 함이 바람직하다.Preferably, the set temperature is about minus 5 ° C. or less, and the set time is preferably about 1 minute.

이하, 본 발명의 히트펌프 에어콘용 냉동사이클장치의 운전방법의 작용효과를 설명하면 다음과 같다.Hereinafter, the operational effects of the operation method of the refrigeration cycle apparatus for a heat pump air conditioner of the present invention will be described.

먼저 냉방운전을 하게 되면 압축기(1)내부에서 냉매와 함께 오일이 토출되어 실외측 열교환기(2)에 머물게 된다. 이후 사방변(5)을 난방모드로 전환하면 실외측 열교환기에 있는 오일이 다시 압축기(1)내로 유입됨으로 압축기(1)내의 오일이 짧은 시간내 일정량으로 유지된다.When the cooling operation is performed first, oil is discharged together with the refrigerant in the compressor 1 to stay in the outdoor heat exchanger 2. Then, when the four sides (5) is switched to the heating mode, the oil in the outdoor heat exchanger flows back into the compressor (1), so that the oil in the compressor (1) is maintained in a certain amount within a short time.

도 4는 종래 운전방법으로 운전한 상태에서 시간에 따른 압축기(1)내의 오일량 변화를 그래프로 도시한 것이고, 도 5는 본 발명의 운전방법으로 운전시 압축기(1)내의 오일양 변화를 도시한 것으로, 현저하게 짧은 시간내에 오일이 일정량으로 유지됨을 알 수 있다.4 is a graph showing a change in the amount of oil in the compressor 1 with time in a state of operation in the conventional operation method, Figure 5 shows a change in the amount of oil in the compressor 1 during operation in the operating method of the present invention. It can be seen that the oil is held in a constant amount in a remarkably short time.

이상에서 설명한 바와 같이 본 발명에 의한 히트펌프 에어콘용 냉동사이클장치의 운전방법은 난방운전 기동시 실외온도가 낮을 경우에도 압축기(1)내의 오일양이 짧은 시간내에 회수됨으로써 압축기(1)내에 오일이 충분한 상태에서 작동이 이루지게 되어 압축기(1)의 신뢰성을 향상시킬 수 있게 된다.As described above, the operation method of the refrigeration cycle apparatus for a heat pump air conditioner according to the present invention is sufficient oil in the compressor (1) by recovering the amount of oil in the compressor (1) in a short time even when the outdoor temperature is low at the start of heating operation. The operation is made in the state it is possible to improve the reliability of the compressor (1).

Claims (2)

압축기, 사방변, 실외측 열교환기, 팽창기구, 실내측 열교환기를 포함하여 구성되는 히트펌프 에어콘용 냉동사이클장치에 있어서, 난방운전 기동시 실외 온도가 압축기내부에 채워지는 오일의 점도을 높게 하는 설정온도 상태가 될 경우 사방변을 조작하여 설정 시간동안 압축기의 오일이 실외측 열교환기로 유입되도록 냉방모드로 운전하는 단계와, 설정시간 후 사방변을 조작하여 난방모드로 운전하는 단계로 진행됨을 특징으로 하는 히트펌프 에어콘용 냉동사이클장치의 운전방법.In a refrigeration cycle apparatus for a heat pump air conditioner including a compressor, a four-sided valve, an outdoor heat exchanger, an expansion device, and an indoor heat exchanger, a preset temperature for increasing the viscosity of oil filled inside the compressor when the heating operation is started. If the condition is to operate the four sides to operate the cooling mode so that the oil of the compressor flows into the heat exchanger on the outside for a set time, and after the set time to operate the four sides to operate in the heating mode Operation method of refrigeration cycle device for heat pump air conditioner. 제1항에 있어서, 상기 설정온도는 영하 5℃이하로 함을 특징으로 하는 히트펌프 에어콘용 냉동사이클장치의 운전방법.The method of operating a refrigeration cycle apparatus for a heat pump air conditioner according to claim 1, wherein the set temperature is below 5 ° C.
KR1019970008306A 1997-03-12 1997-03-12 Operation method of refrigerating cycle for heat pump air conditioner, for improving reliability of compressor by operating the same when oil is sufficiently supplied KR100429985B1 (en)

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