KR20150109748A - Air Conditioner - Google Patents

Air Conditioner Download PDF

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Publication number
KR20150109748A
KR20150109748A KR1020140032959A KR20140032959A KR20150109748A KR 20150109748 A KR20150109748 A KR 20150109748A KR 1020140032959 A KR1020140032959 A KR 1020140032959A KR 20140032959 A KR20140032959 A KR 20140032959A KR 20150109748 A KR20150109748 A KR 20150109748A
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South Korea
Prior art keywords
refrigerant
injection
compressor
expansion valve
condenser
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KR1020140032959A
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Korean (ko)
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KR102242777B1 (en
Inventor
류병진
김병수
고영환
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엘지전자 주식회사
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Priority to KR1020140032959A priority Critical patent/KR102242777B1/en
Priority to EP15160070.7A priority patent/EP2924371B1/en
Priority to US14/663,608 priority patent/US20150267930A1/en
Publication of KR20150109748A publication Critical patent/KR20150109748A/en
Application granted granted Critical
Publication of KR102242777B1 publication Critical patent/KR102242777B1/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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/001—Compression cycle 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/39—Dispositions with two or more expansion means arranged in series, i.e. multi-stage expansion, on a refrigerant line leading to the same evaporator
    • 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
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/05—Compression system with heat exchange between particular parts of the system
    • F25B2400/053—Compression system with heat exchange between particular parts of the system between the storage receiver and another part of the system
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/05—Compression system with heat exchange between particular parts of the system
    • F25B2400/054—Compression system with heat exchange between particular parts of the system between the suction tube of the compressor and another part of the cycle
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/23—Separators
    • 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
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2509—Economiser 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2513—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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/19—Pressures
    • F25B2700/195—Pressures of the condenser
    • 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
    • F25B2700/2115—Temperatures of a compressor or the drive means therefor
    • F25B2700/21151—Temperatures of a compressor or the drive means therefor at the suction side of the compressor
    • 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
    • F25B2700/2115—Temperatures of a compressor or the drive means therefor
    • F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
    • 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
    • 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
    • F25B2700/2117—Temperatures of an evaporator
    • 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
    • F25B41/385—Dispositions with two or more expansion means arranged in parallel on a refrigerant line leading to the same evaporator

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The present invention relates to an air conditioner injecting a refrigerant to a compressor in two stages with simple composition. According to an embodiment of the present invention, an air conditioner comprises: a compressor compressing a refrigerant; a condenser condensing the refrigerant compressed in the compressor; an evaporator evaporating the refrigerant condensed in the condenser; and an injection module separating the refrigerant flowing into the evaporator in the condenser to a gaseous refrigerant and a liquid refrigerant, expanding the separated gaseous refrigerant to be injected to the compressor, and expanding a portion of the separated liquid refrigerant to be evaporated and injected to the compressor.

Description

공기조화기 {Air Conditioner}Air conditioner

본 발명은 공기조화기에 관한 것으로, 보다 상세하게는 간소한 구성으로 압축기에 냉매를 2단계로 인젝션하는 공기조화기에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly, to an air conditioner for injecting a refrigerant into a compressor in a two-step manner with a simple structure.

일반적으로 공기조화기는 압축기, 실외 열교환기, 팽창밸브 및 실내 열교환기를 포함하는 냉동 사이클을 이용하여 실내를 냉방 또는 난방시키는 장치이다. 즉 실내를 냉방시키는 냉방기, 실내를 난방시키는 난방기로 구성될 수 있다. 그리고 실내를 냉방 또는 난방시키는 냉난방 겸용 공기조화기로 구성될 수도 있다.Generally, the air conditioner is a device for cooling or heating the room by using a refrigeration cycle including a compressor, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger. A radiator for cooling the room, and a radiator for heating the room. And a cooling / heating air conditioner for cooling or heating the room.

이러한 공기조화기는 난방 또는 냉방시 응축된 냉매 일부를 압축기에 인젝션(injection)하여 효율을 향상시킨다. 고효율을 위하여 압축기의 고압측과 저압측에 냉매를 동시에 인젝션하는 2단계 인젝션이 요구되나 2단계 인젝션은 구조가 복잡하고 비용이 상승하는 문제점이 있었다. Such an air conditioner improves the efficiency by injecting a part of the condensed refrigerant into the compressor when heating or cooling. In order to achieve high efficiency, two-stage injection is required to simultaneously inject refrigerant into the high-pressure side and the low-pressure side of the compressor, but the two-stage injection has a problem in that the structure is complicated and the cost is increased.

본 발명이 해결하고자 하는 과제는 간소한 구성으로 압축기에 냉매를 2단계로 인젝션할 수 있는 공기조화기를 제공하는 것이다.SUMMARY OF THE INVENTION An object of the present invention is to provide an air conditioner capable of injecting refrigerant into a compressor in two stages with a simple structure.

본 발명의 과제들은 이상에서 언급한 과제들로 제한되지 않으며, 언급되지 않은 또 다른 과제들은 아래의 기재로부터 당업자에게 명확하게 이해될 수 있을 것이다.The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

상기 과제를 달성하기 위하여, 본 발명의 실시예에 따른 공기조화기는, 냉매를 압축하는 압축기; 상기 압축기에서 압축된 냉매를 응축하는 응축기; 상기 응축기에서 응축된 냉매를 증발하는 증발기; 및 상기 응축기에서 상기 증발기로 유동되는 냉매를 기상냉매와 액상냉매로 분리하고 분리된 기상냉매를 팽창하여 상기 압축기로 인젝션하고 분리된 액상냉매의 일부를 팽창한 후 증발하여 상기 압축기로 인젝션하는 인젝션 모듈을 포함을 포함한다.According to an aspect of the present invention, there is provided an air conditioner comprising: a compressor for compressing a refrigerant; A condenser for condensing the refrigerant compressed in the compressor; An evaporator for evaporating the refrigerant condensed in the condenser; And an injection module for injecting the separated gaseous refrigerant into the compressor, expanding a part of the separated liquid refrigerant, and evaporating the refrigerant and injecting the refrigerant into the compressor by separating the refrigerant flowing from the condenser to the evaporator into a gaseous refrigerant and a liquid refrigerant, .

상기 과제를 달성하기 위하여, 본 발명의 실시예에 따른 공기조화기는, 냉매를 압축하는 압축기; 상기 압축기에서 압축된 냉매를 응축하는 응축기; 상기 응축기에서 응축된 냉매를 증발하는 증발기; 상기 응축기와 상기 증발기 사이에 배치되어 유동되는 냉매를 기상냉매와 액상냉매로 분리하는 인젝션 기액분리기; 상기 인젝션 기액분리기와 상기 압축기에 연결되어 상기 인젝션 기액분리기에서 분리된 기상냉매를 팽창하는 제 1 인젝션 팽창밸브; 상기 인젝션 기액분리기에 연결되어 분리된 액상냉매의 일부를 팽창하는 제 2 인젝션 팽창밸브; 및 상기 제 2 인젝션 팽창밸브와 상기 압축기에 연결되고 상기 인젝션 기액분리기 내에 배치되어 상기 제 2 인젝션 팽창밸브에서 팽창된 냉매를 증발하는 인젝션 열교환기를 포함한다.According to an aspect of the present invention, there is provided an air conditioner comprising: a compressor for compressing a refrigerant; A condenser for condensing the refrigerant compressed in the compressor; An evaporator for evaporating the refrigerant condensed in the condenser; An injecting gas-liquid separator for separating refrigerant flowing between the condenser and the evaporator and flowing into a gaseous refrigerant and a liquid-phase refrigerant; A first injection expansion valve connected to the injection gas-liquid separator and the compressor to expand the gaseous refrigerant separated in the injection gas-liquid separator; A second injection expansion valve connected to the injection gas-liquid separator to expand a part of the separated liquid refrigerant; And an injection heat exchanger connected to the second injection expansion valve and the compressor and disposed in the injection gas-liquid separator to evaporate the refrigerant expanded in the second injection expansion valve.

기타 실시예들의 구체적인 사항들은 상세한 설명 및 도면들에 포함되어 있다.The details of other embodiments are included in the detailed description and drawings.

본 발명의 공기조화기에 따르면 다음과 같은 효과가 하나 혹은 그 이상 있다.The air conditioner of the present invention has one or more of the following effects.

첫째,　간소한 구성으로 압축기의 고압측 및 저압측에 냉매를 인젝션할 수 있는 장점이 있다.First, refrigerant can be injected into the high pressure side and the low pressure side of the compressor with a simple structure.

둘째,　기액분리기, 열교환기 및 팽창밸브의 구성 및 그 제어를 통하여 2단계의 인젝션을 구현함으로써 공기조화기의 효율을 높일 수 있는 장점도 있다.Second, the efficiency of the air conditioner can be improved by implementing the two-stage injection through the configuration and control of the gas-liquid separator, the heat exchanger, and the expansion valve.

셋째,　냉매의 과냉각 및 2단계 인젝션을 하나의 모듈로 구현할 수 있는 장점도 있다.Third, there is an advantage that the supercooling of the refrigerant and the two-step injection can be realized by a single module.

본 발명의 효과들은 이상에서 언급한 효과들로 제한되지 않으며, 언급되지 않은 또 다른 효과들은 청구범위의 기재로부터 당업자에게 명확하게 이해될 수 있을 것이다.The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

도 1은 본 발명의 일 실시예에 따른 공기조화기에 대한 구성도이다.
도 2는 본 발명의 일 실시예에 따른 공기조화기에 대한 블록도이다.
도 3은 본 발명의 일 실시예에 따른 공기조화기의 작동시 압력-엔탈피 선도(Pressure-Enthalpy Diagram, 이하 P-h 선도)를 나타내는 도면이다.1 is a configuration diagram of an air conditioner according to an embodiment of the present invention.
2 is a block diagram of an air conditioner according to an embodiment of the present invention.
3 is a view showing a pressure-enthalpy diagram (hereinafter referred to as Ph diagram) during operation of the air conditioner according to an embodiment of the present invention.

본 발명의 이점 및 특징, 그리고 그것들을 달성하는 방법은 첨부되는 도면과 함께 상세하게 후술되어 있는 실시예들을 참조하면 명확해질 것이다. 그러나 본 발명은 이하에서 개시되는 실시예들에 한정되는 것이 아니라 서로 다른 다양한 형태로 구현될 수 있으며, 단지 본 실시예들은 본 발명의 개시가 완전하도록 하고, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 발명의 범주를 완전하게 알려주기 위해 제공되는 것이며, 본 발명은 청구항의 범주에 의해 정의될 뿐이다. 명세서 전체에 걸쳐 동일 참조 부호는 동일 구성 요소를 지칭한다.BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

이하, 본 발명의 실시예들에 의하여 공기조화기를 설명하기 위한 도면들을 참고하여 본 발명에 대해 설명하도록 한다.Hereinafter, the present invention will be described with reference to the drawings for explaining an air conditioner according to embodiments of the present invention.

도 1은 본 발명의 일 실시예에 따른 공기조화기에 대한 구성도이다.1 is a configuration diagram of an air conditioner according to an embodiment of the present invention.

본 발명의 일 실시예에 따른 공기조화기는, 냉매를 압축하는 압축기(110)와, 압축기(110)에서 압축된 냉매를 응축하는 응축기(120)와, 응축기(120)에서 응축된 냉매를 증발하는 증발기(130)와, 응축기(120)에서 증발기(130)로 유동되는 냉매를 기상냉매와 액상냉매로 분리하고, 분리된 기상냉매를 팽창하여 압축기(110)로 인젝션하고, 분리된 액상냉매의 일부를 팽창한 후 증발하여 압축기(110)로 인젝션하는 인젝션 모듈(170)을 포함한다.The air conditioner according to an embodiment of the present invention includes a compressor 110 for compressing a refrigerant, a condenser 120 for condensing the refrigerant compressed in the compressor 110, a condenser 120 for condensing the refrigerant condensed in the condenser 120 The evaporator 130 and the refrigerant flowing from the condenser 120 to the evaporator 130 are separated into a gaseous refrigerant and a liquid refrigerant. The separated gaseous refrigerant is expanded and injected into the compressor 110, And an injection module 170 for expanding the refrigerant and then injecting the evaporated refrigerant into the compressor 110.

압축기(110)는 유입되는 저온 저압의 냉매를 고온 고압의 냉매로 압축시킨다. 압축기(110)는 다양한 구조가 적용될 수 있으며, 실린더 및 피스톤을 이용한 왕복동 압축기 또는 선회 스크롤 및 고정 스크롤을 이용한 스크롤 압축기일 수 있다. 본 실시예에서 압축기(110)는 스크롤 압축기이다.The compressor 110 compresses the introduced low-temperature low-pressure refrigerant into high-temperature high-pressure refrigerant. The compressor 110 may have various structures, and may be a reciprocating compressor using a cylinder and a piston, or a scroll compressor using a revolving scroll and a fixed scroll. In this embodiment, the compressor 110 is a scroll compressor.

압축기(110)는, 증발기(130)에서 증발된 냉매가 유입되는 제 1 유입포트(111)와, 인젝션 모듈(180)에서 팽창되어 증발된 냉매가 유입되는 제 2 유입포트(112) 및 제 3 유입포트(113)와, 압축된 냉매가 토출되는 토출포트(114)를 포함한다.The compressor 110 includes a first inlet port 111 through which the refrigerant evaporated in the evaporator 130 flows and a second inlet port 112 through which the refrigerant evaporated and expanded in the injection module 180 flows, An inlet port 113, and a discharge port 114 through which the compressed refrigerant is discharged.

제 2 유입포트(112)는 압축기(110)에서 냉매가 압축되는 압축실의 저압측에 형성되고 제 3 유입포트(113)는 압축기(110) 압축실의 고압측에 형성되는 것이 바람직하다.The second inlet port 112 is formed on the low pressure side of the compression chamber where the refrigerant is compressed in the compressor 110 and the third inlet port 113 is formed on the high pressure side of the compression chamber of the compressor 110.

압축기(110)의 고압측은 압축기(110)의 저압측보다 상대적으로 온도와 압력이 낮은 부분이다. 압축기(110)의 저압측은 압축실에서 제 1 유입포트(111)에 가까운 부분이며, 고압측은 토출포트(114)에 가까운 부분이다. 압축기(110)의 제 1 유입포트(111)로 유입된 냉매는 압축실 내부로 유입되어 저압측을 거쳐 고압측을 통과하여 토출포트(114)로 토출된다.The high pressure side of the compressor 110 is a portion of which the temperature and pressure are relatively lower than the low pressure side of the compressor 110. The low-pressure side of the compressor 110 is a portion close to the first inlet port 111 in the compression chamber, and the high-pressure side is a portion close to the discharge port 114. The refrigerant introduced into the first inlet port 111 of the compressor 110 flows into the compression chamber, passes through the low pressure side, passes through the high pressure side, and is discharged to the discharge port 114.

압축기(110)는 제 1 유입포트(111)로 유입된 냉매를 압축실에서 압축하며 압축실의 저압측에 형성된 제 2 유입포트(112)로 유입되는 냉매와 합류시켜 압축시킨다. 압축기(110)는 합류된 냉매를 압축하며 압축실의 고압측에 형성된 제 3 유입포트(113)로 유입되는 냉매와 합류하여 압축시켜 압축시킨다. 압축기(110)는 합류된 냉매를 압축하여 토출포트(114)로 토출시킨다.The compressor 110 compresses the refrigerant introduced into the first inlet port 111 in the compression chamber and merges with the refrigerant introduced into the second inlet port 112 formed on the low-pressure side of the compression chamber to compress the refrigerant. The compressor 110 compresses the combined refrigerant, joins with the refrigerant flowing into the third inlet port 113 formed on the high-pressure side of the compression chamber, compresses and compresses the combined refrigerant. The compressor (110) compresses the combined refrigerant and discharges it to the discharge port (114).

응축기(120)는 압축기(110)와 연결되어 압축기(110)에서 압축된 냉매를 응축한다. 공기조화기가 실내를 냉방하는 냉방기인 경우 응축기(120)는 실외에 배치되어 실외 공기를 냉매와 열교환하는 실외 열교환기이고, 공기조화기가 실내를 난방하는 난방기인 경우 응축기(120)는 실내에 배치되어 실내 공기와 냉매를 열교환하는 실내 열교환기인 것이 바람직하다.The condenser 120 is connected to the compressor 110 to condense the refrigerant compressed in the compressor 110. In the case where the air conditioner is a radiator that cools the room, the condenser 120 is an outdoor heat exchanger that is disposed outside the room to heat-exchange the outdoor air with the refrigerant. When the air conditioner is a radiator heating the room, And is preferably an indoor heat exchanger for exchanging heat between indoor air and refrigerant.

응축기(120)는 제 1 메인 팽창밸브(140)와 연결되어, 응축기(120)에서 응축된 냉매는 제 1 메인 팽창밸브(140)로 유동된다.The condenser 120 is connected to the first main expansion valve 140 so that the refrigerant condensed in the condenser 120 flows to the first main expansion valve 140.

제 1 메인 팽창밸브(140)는 응축기(120)와 연결되어 응축기(120)에서 응축된 냉매를 팽창한다. 제 1 메인 팽창밸브(140)는 응축기(120)와 인젝션 모듈(170) 사이에 배치된다. 제 1 메인 팽창밸브(140)는 인젝션 모듈(170)과 연결되어, 제 1 메인 팽창밸브(140)에서 팽창된 냉매는 인젝션 모듈(170)로 안내된다.The first main expansion valve 140 is connected to the condenser 120 to expand the condensed refrigerant in the condenser 120. The first main expansion valve 140 is disposed between the condenser 120 and the injection module 170. The first main expansion valve 140 is connected to the injection module 170 so that the refrigerant expanded in the first main expansion valve 140 is guided to the injection module 170.

제 1 메인 팽창밸브(140)는 실시예에 따라 생략될 수 있으며, 이 경우 응축기(120)에서 응축된 냉매는 인젝션 모듈(170)로 유동된다.The first main expansion valve 140 may be omitted according to the embodiment, in which the refrigerant condensed in the condenser 120 flows to the injection module 170.

인젝션 모듈(170)은 응축기(120)와 증발기(130) 사이에 배치되어 압축기(110)의 고압측 및 저압측과 연결된다. 인젝션 모듈(170)은 압축기(110)의 제 2 유입포트(112), 압축기(110)의 제 3 유입포트(113), 제 1 메인 팽창밸브(140) 및 제 2 메인 팽창밸브(150)와 연결된다. 인젝션 모듈(170)은 제 1 메인 팽창밸브(140)와 연결되어 제 1 메인 팽창밸브(140)에서 팽창된 냉매를 압축기(110)의 고압측 및 저압측에 인젝션한다.The injection module 170 is disposed between the condenser 120 and the evaporator 130 and is connected to the high pressure side and the low pressure side of the compressor 110. The injection module 170 is connected to the second inlet port 112 of the compressor 110, the third inlet port 113 of the compressor 110, the first main expansion valve 140 and the second main expansion valve 150, . The injection module 170 is connected to the first main expansion valve 140 to inject the refrigerant expanded in the first main expansion valve 140 to the high pressure side and the low pressure side of the compressor 110.

인젝션 모듈(170)은 제 1 메인 팽창밸브(140)와 연결되어 제 1 메인 팽창밸브(140)에서 팽창된 냉매를 압축기(110)의 고압측 및 저압측에 인젝션한다.The injection module 170 is connected to the first main expansion valve 140 to inject the refrigerant expanded in the first main expansion valve 140 to the high pressure side and the low pressure side of the compressor 110.

인젝션 모듈(170)은 제 1 메인 팽창밸브(140)에서 제 2 메인 팽창밸브(150)로 유동되는 냉매를 기상냉매와 액상냉매로 분리하고 분리된 기상냉매를 팽창하여 압축기(110)의 고압측으로 인젝션한다. 인젝션 모듈(170)은 분리된 액상냉매의 일부를 팽창한 후 증발하여 압축기(110)의 저압측으로 인젝션한다.The injection module 170 separates the refrigerant flowing from the first main expansion valve 140 into the second main expansion valve 150 into the gaseous phase refrigerant and the liquid phase refrigerant and expands the separated gaseous phase refrigerant to the high pressure side of the compressor 110 Injection. The injection module 170 expands a part of the separated liquid refrigerant, evaporates and injects the refrigerant into the low pressure side of the compressor 110.

인젝션 모듈(170)은 제 2 메인 팽창밸브(150)와 연결되어 분리된 액상냉매의 다른 일부는 제 2 메인 팽창밸브(150)로 유동된다.The injection module 170 is connected to the second main expansion valve 150 and another part of the separated liquid refrigerant flows to the second main expansion valve 150.

본 발명의 일 실시예에 따른 인젝션 모듈(170)은, 응축기(120)와 증발기(130) 사이에 배치되어 유동되는 냉매를 기상냉매와 액상냉매로 분리하는 인젝션 기액분리기(174)와, 인젝션 기액분리기(174)와 압축기에 연결되어 인젝션 기액분리기(174)에서 분리된 기상냉매를 팽창하는 제 1 인젝션 팽창밸브(171)와, 인젝션 기액분리기(174)에 연결되어 분리된 액상냉매의 일부를 팽창하는 제 2 인젝션 팽창밸브(172)와, 제 2 인젝션 팽창밸브(172)와 압축기(110)에 연결되고 상기 인젝션 기액분리기 내에 배치되어 제 2 인젝션 팽창밸브에서 팽창된 냉매를 증발하는 인젝션 열교환기(173)를 포함한다.The injection module 170 according to an embodiment of the present invention includes an injection gas-liquid separator 174 for separating the refrigerant flowing between the condenser 120 and the evaporator 130 and flowing into the gaseous refrigerant and the liquid-phase refrigerant, A first injection expansion valve 171 connected to the separator 174 and the compressor for expanding the gaseous refrigerant separated by the injection gas-liquid separator 174, and a second injection expansion valve 173 connected to the injection gas-liquid separator 174, A second injection expansion valve 172 and an injection heat exchanger (not shown) connected to the second injection expansion valve 172 and the compressor 110 and disposed in the injection gas-liquid separator to evaporate the refrigerant expanded in the second injection expansion valve 173).

인젝션 기액분리기(174)는 응축기(120)와 증발기(130) 사이에 배치된다. 인젝션 기액분리기(174)는 제 1 메인 팽창밸브(140), 제 2 메인 팽창밸브(150), 제 1 인젝션 팽창밸브(171) 및 제 2 인젝션 팽창밸브(172)와 연결되며 내부에 인젝션 열교환기(173)가 배치된다.The injection gas-liquid separator 174 is disposed between the condenser 120 and the evaporator 130. The injection gas-liquid separator 174 is connected to the first main expansion valve 140, the second main expansion valve 150, the first injection expansion valve 171 and the second injection expansion valve 172, (173).

인젝션 기액분리기(174)는 냉매의 압력차를 이용하여 액상냉매와 기상냉매를 분리하는 어큐뮬레이터(Accumulator)이다. 실시예에 따른 인젝션 기액분리기(174)는 액상냉매와 기상냉매를 분리할 수 있는 다양한 장치로 구성될 수 있다.The injection gas-liquid separator 174 is an accumulator for separating the liquid refrigerant and the gaseous refrigerant using the pressure difference of the refrigerant. The injection gas-liquid separator 174 according to the embodiment may be composed of various devices capable of separating the liquid-phase refrigerant and the gaseous refrigerant.

인젝션 기액분리기(174)는 제 1 메인 팽창밸브(140)에서 팽창된 냉매를 기상냉매와 액상냉매로 분리한다. 인젝션 기액분리기(174)에서 분리된 기상냉매는 제 1 인젝션 팽창밸브(171)로 유동된다. 인젝션 기액분리기(174)에서 분리된 액상냉매의 일부는 제 2 인젝션 팽창밸브(172)로 유동된다. 인젝션 기액분리기(174)에서 분리된 액상냉매의 다른 일부는 제 2 메인 팽창밸브(150)로 유동된다.The injection gas-liquid separator 174 separates refrigerant expanded in the first main expansion valve 140 into gaseous refrigerant and liquid refrigerant. The gaseous refrigerant separated in the injection gas-liquid separator 174 flows to the first injection expansion valve 171. A part of the liquid refrigerant separated in the injection gas-liquid separator 174 flows to the second injection expansion valve 172. And the other part of the liquid refrigerant separated in the injection gas-liquid separator 174 flows to the second main expansion valve 150.

제 1 인젝션 팽창밸브(171)는 인젝션 기액분리기(174) 및 압축기(110)의 제 3 유입포트(113)와 연결된다. 제 1 인젝션 팽창밸브(171)은 인젝션 기액분리기(174)에서 분리된 기상냉매를 팽창한다. 제 1 인젝션 팽창밸브(171)에서 팽창된 냉매는 제 3 유입포트(113)를 통하여 압축기(110)의 고압측으로 인젝션된다.The first injection expansion valve 171 is connected to the injection gas-liquid separator 174 and the third inlet port 113 of the compressor 110. The first injection expansion valve 171 expands the gaseous refrigerant separated in the injection gas-liquid separator 174. The refrigerant expanded in the first injection expansion valve 171 is injected into the high pressure side of the compressor 110 through the third inlet port 113.

제 2 인젝션 팽창밸브(172)는 인젝션 기액분리기(174) 및 인젝션 열교환기(173)와 연결된다. 제 2 인젝션 팽창밸브(172)는 인젝션 기액분리기(174)에서 분리된 액상냉매의 일부를 팽창한다. 제 2 인젝션 팽창밸브(172)에서 팽창된 냉매는 인젝션 열교환기(173)로 유동된다.The second injection expansion valve 172 is connected to the injection gas-liquid separator 174 and the injection heat exchanger 173. The second injection expansion valve 172 inflates a part of the liquid refrigerant separated in the injection gas-liquid separator 174. The refrigerant expanded in the second injection expansion valve 172 flows to the injection heat exchanger 173.

인젝션 열교환기(173)는 제 2 인젝션 팽창밸브(172) 및 압축기(110)의 제 2 유입포트(112)와 연결되며 인젝션 기액분리기(174) 내에 배치된다. 인젝션 열교환기(173)는 제 2 인젝션 팽창밸브(172)에서 팽창된 냉매를 인젝션 기액분리기(174) 내의 냉매와 열교환한다. 바람직하게는 인젝션 열교환기(173)는 제 2 인젝션 팽창밸브(172)에서 팽창된 냉매를 인젝션 기액분리기(174) 내의 액상냉매와 열교환한다.The injection heat exchanger 173 is connected to the second injection expansion valve 172 and the second inlet port 112 of the compressor 110 and is disposed in the injection gas-liquid separator 174. The injection heat exchanger 173 exchanges the refrigerant expanded in the second injection expansion valve 172 with the refrigerant in the injection gas-liquid separator 174. Preferably, the injection heat exchanger 173 exchanges the refrigerant expanded in the second injection expansion valve 172 with the liquid refrigerant in the injection gas-liquid separator 174.

인젝션 열교환기(173)는 제 2 인젝션 팽창밸브(172)에서 팽창된 냉매를 인젝션 기액분리기(174) 내의 액상냉매와 열교환하여 가열하여 증발시킨다. 인젝션 열교환기(173)에서 증발된 냉매는 제 2 유입포트(112)를 통하여 압축기(110)의 저압측으로 인젝션된다.The injection heat exchanger 173 heat-exchanges the refrigerant expanded in the second injection expansion valve 172 with the liquid refrigerant in the injection gas-liquid separator 174, and heats and evaporates the refrigerant. The refrigerant evaporated in the injection heat exchanger 173 is injected into the low pressure side of the compressor 110 through the second inlet port 112. [

인젝션 열교환기(173)는 인젝션 기액분리기(174) 내의 액상냉매를 제 2 인젝션 팽창밸브(172)에서 팽창된 냉매와 열교환하여 과냉각한다. 인젝션 열교환기(173)에서 과냉각된 냉매는 제 2 메인 팽창밸브(150) 및 제 2 인젝션 팽창밸브(172)로 유동된다.The injection heat exchanger 173 undergoes supercooling by exchanging the liquid refrigerant in the injection gas-liquid separator 174 with the refrigerant expanded in the second injection expansion valve 172. The refrigerant supercooled in the injection heat exchanger 173 flows to the second main expansion valve 150 and the second injection expansion valve 172.

제 2 메인 팽창밸브(150)는 인젝션 모듈(170)에 연결되어 제 2 메인 팽창밸브(150)로부터 유동되는 냉매를 팽창한다. 제 2 메인 팽창밸브(150)는 인젝션 모듈(170)과 증발기(130) 사이에 배치된다. 제 2 메인 팽창밸브(150)는 증발기(130)와 연결되어, 제 1 메인 팽창밸브(140)에서 팽창된 냉매는 증발기(130)로 안내된다.The second main expansion valve 150 is connected to the injection module 170 to expand the refrigerant flowing from the second main expansion valve 150. The second main expansion valve 150 is disposed between the injection module 170 and the evaporator 130. The second main expansion valve 150 is connected to the evaporator 130 so that the refrigerant expanded in the first main expansion valve 140 is guided to the evaporator 130.

증발기(130)는 제 2 메인 팽창밸브(150)와 압축기(110)사이에 구비되어 제 2 메인 팽창밸브(150)에서 팽창된 냉매를 증발한다. 공기조화기가 실내를 냉방하는 냉방기인 경우 증발기(130)는 실내에 배치되어 실내 공기와 냉매를 열교환하는 실내 열교환기이고, 공기조화기가 실내를 난방하는 난방기인 경우 증발기(130)는 실외에 배치되어 실외 공기를 냉매와 열교환하는 실외 열교환기인 것이 바람직하다.The evaporator 130 is disposed between the second main expansion valve 150 and the compressor 110 to evaporate the refrigerant expanded in the second main expansion valve 150. In the case where the air conditioner is a radiator that cools the room, the evaporator 130 is an indoor heat exchanger that is disposed in the room to exchange heat between the room air and the refrigerant. When the air conditioner is a radiator that heats the room, the evaporator 130 is disposed outside And is preferably an outdoor heat exchanger for exchanging outdoor air with a refrigerant.

증발기(130)는 압축기(110)의 제 1 유입포트(111)와 연결되어, 증발기(130)에서 증발된 냉매는 제 1 유입포트(111)를 통하여 압축기(110)로 유입된다.The evaporator 130 is connected to the first inlet port 111 of the compressor 110 so that the refrigerant evaporated in the evaporator 130 flows into the compressor 110 through the first inlet port 111.

도 2는 본 발명의 일 실시예에 따른 공기조화기에 대한 블록도이다.2 is a block diagram of an air conditioner according to an embodiment of the present invention.

도 2를 참조하면, 본 발명의 일 실시예에 따른 공기조화기는, 공기조화기를 제어하는 제어부(10)와, 압축기(110)의 토출포트(114)에서 토출되는 냉매의 토출온도를 측정하는 토출 온도센서(11)와, 응축기(120)에서 응축되는 냉매의 응축온도를 측정하는 응축 온도센서(12)와, 압축기(110)의 제 1 유입포트(111)로 흡입되는 냉매의 흡입온도를 측정하는 흡입 온도센서(13)와, 증발기(130)에서 증발되는 냉매의 증발온도를 측정하는 증발 온도센서(14)와, 제 2 인젝션 팽창밸브(172)에서 팽창된 냉매의 온도를 측정하는 인젝션 팽창 온도센서(15)와, 인젝션 열교환기(173)에서 증발된 냉매의 온도를 측정하는 인젝션 증발 온도센서(16)를 포함한다.2, an air conditioner according to an embodiment of the present invention includes a control unit 10 for controlling an air conditioner, a discharge unit 114 for measuring the discharge temperature of the refrigerant discharged from the discharge port 114 of the compressor 110, A condensation temperature sensor 12 for measuring the condensation temperature of the refrigerant condensed in the condenser 120 and a condensation temperature sensor 12 for measuring the temperature of the refrigerant sucked into the first inlet port 111 of the compressor 110 An evaporation temperature sensor 14 for measuring the evaporation temperature of the refrigerant evaporated in the evaporator 130 and an injection expansion sensor 16 for measuring the temperature of the refrigerant expanded in the second injection expansion valve 172. [ A temperature sensor 15 and an injection evaporation temperature sensor 16 for measuring the temperature of the refrigerant evaporated in the injection heat exchanger 173. [

제어부(10)는 공기조화기의 운전을 제어하는 것으로서, 압축기(110), 제 1 메인 팽창밸브(140), 제 2 메인 팽창밸브(150), 제 1 인젝션 팽창밸브(171) 및 제 2 인젝션 팽창밸브(172)를 제어한다. 제어부(10)는 운전조건에 따라 제 1 메인 팽창밸브(140), 제 2 메인 팽창밸브(150), 제 1 인젝션 팽창밸브(171) 및 제 2 인젝션 팽창밸브(172)의 개도를 조절한다.The control unit 10 controls the operation of the air conditioner and includes a compressor 110, a first main expansion valve 140, a second main expansion valve 150, a first injection expansion valve 171, And controls the expansion valve 172. The controller 10 adjusts the opening degree of the first main expansion valve 140, the second main expansion valve 150, the first injection expansion valve 171 and the second injection expansion valve 172 according to the operating conditions.

토출 온도센서(11)는 압축기(110)에서 압축된 후 토출포트(114)로 토출되는 냉매의 온도인 토출온도를 측정하는 센서이다. 토출 온도센서(11)는 다양한 지점에 위치하여 압축기(110)에서 토출되는 냉매의 온도를 측정할 수 있으며 본 실시예에서는 b 지점에 구비된다.The discharge temperature sensor 11 is a sensor for measuring the discharge temperature which is the temperature of the refrigerant discharged from the discharge port 114 after being compressed by the compressor 110. The discharge temperature sensor 11 is located at various points and can measure the temperature of the refrigerant discharged from the compressor 110, and is provided at point b in this embodiment.

응축 온도센서(12)는 응축기(120)에서 응축되는 냉매의 온도인 응축온도를 측정하는 센서이다. 응축 온도센서(12)는 다양한 지점에 위치하여 냉매의 응축온도를 측정할 수 있으며 본 실시예에서는 c 지점에 구비된다. 실시예에 따라 응축 온도센서(12)는 응축기(120)에 구비될 수 있다. 실시예에 따라 냉매의 응축온도는 압력센서가 측정한 냉매의 응축압력으로부터 환산할 수 있다.The condensation temperature sensor 12 is a sensor for measuring the condensation temperature which is the temperature of the refrigerant condensed in the condenser 120. The condensation temperature sensor 12 is located at various points to measure the condensation temperature of the refrigerant and is provided at the point c in this embodiment. The condensation temperature sensor 12 may be provided in the condenser 120 according to an embodiment. According to the embodiment, the condensation temperature of the refrigerant can be converted from the condensation pressure of the refrigerant measured by the pressure sensor.

흡입 온도센서(13)는 증발기(140)에서 증발된 후 압축기(110)의 제 1 유입포트(111)로 유입되는 냉매의 온도인 흡입온도을 측정하는 센서이다. 흡입 온도센서(13)는 다양한 지점에 위치하여 압축기(110)로 흡입되는 냉매의 온도를 측정할 수 있으며 본 실시예에서는 a 지점에 구비된다.The suction temperature sensor 13 is a sensor for measuring the suction temperature which is the temperature of the refrigerant which is evaporated in the evaporator 140 and then flows into the first inlet port 111 of the compressor 110. The suction temperature sensor 13 is located at various points and can measure the temperature of the refrigerant sucked into the compressor 110. In this embodiment, the suction temperature sensor 13 is provided at the point a.

증발 온도센서(14)는 증발기(130)에서 증발되는 냉매의 온도인 증발온도를 측정하는 센서이다. 증발 온도센서(14)는 다양한 지점에 위치하여 냉매의 증발온도를 측정할 수 있으며 본 실시예에서는 i 지점에 구비된다. 실시예에 따라 증발 온도센서(14)는 증발기(130)에 구비될 수 있다. 실시예에 따라 냉매의 증발온도는 압력센서가 측정한 냉매의 증발압력으로부터 환산할 수 있다.The evaporation temperature sensor 14 is a sensor for measuring the evaporation temperature which is the temperature of the refrigerant evaporated in the evaporator 130. The evaporation temperature sensor 14 is located at various points and can measure the evaporation temperature of the refrigerant, and is provided at the point i in this embodiment. According to an embodiment, the evaporation temperature sensor 14 may be provided in the evaporator 130. According to the embodiment, the evaporation temperature of the refrigerant can be converted from the evaporation pressure of the refrigerant measured by the pressure sensor.

인젝션 팽창 온도센서(15)는 제 2 인젝션 팽창밸브(181)에서 팽창된 냉매의 온도인 인젝션 팽창온도를 측정하는 센서이다. 인젝션 팽창 온도센서(15)는 다양한 지점에 위치하여 인젝션 되는 냉매의 인젝션 팽창온도를 측정할 수 있으며 본 실시예에서는 f 지점에 구비된다.The injection expansion temperature sensor 15 is a sensor for measuring the injection expansion temperature which is the temperature of the refrigerant expanded in the second injection expansion valve 181. The injection expansion temperature sensor 15 is located at various points and is capable of measuring the injection expansion temperature of the injected refrigerant. In this embodiment, the injection expansion temperature sensor 15 is provided at the point f.

인젝션 증발 온도센서(16)는 인젝션 열교환기(182)에서 증발되어 압축기(110)의 제 2 유입포트(112)로 인젝션되는 냉매의 온도인 인젝션 증발온도를 측정하는 센서이다. 인젝션 증발 온도센서(16)는 다양한 지점에 위치하여 인젝션 증발온도를 측정할 수 있으며 본 실시예에서는 g 지점에 구비된다.The injection evaporation temperature sensor 16 is a sensor for measuring an injection evaporation temperature which is a temperature of a refrigerant evaporated in the injection heat exchanger 182 and injected into the second inlet port 112 of the compressor 110. The injection evaporation temperature sensor 16 is located at various points to measure the injection evaporation temperature and is provided at the point g in this embodiment.

제어부(10)는 토출 온도센서(11)가 측정한 토출온도와 응축 온도센서(12)가 측정한 응축온도의 차인 토출과열도에 따라 제 1 메인 팽창밸브(140)의 개도를 조절한다. 제어부(10)는 토출과열도가 기설정된 범위를 벗어나지 않도록 제 1 메인 팽창밸브(140)의 개도를 조절한다.The control unit 10 adjusts the opening degree of the first main expansion valve 140 according to the discharge and the degree of the circulation which is the difference between the discharge temperature measured by the discharge temperature sensor 11 and the condensation temperature measured by the condensation temperature sensor 12. [ The control unit 10 adjusts the opening degree of the first main expansion valve 140 so that the discharge and the degree of the circulation do not deviate from the predetermined range.

제어부(10)는 흡입 온도센서(13)가 측정한 흡입온도와 증발 온도센서(14)가 측정한 증발온도의 차인 흡입과열도에 따라 제 2 메인 팽창밸브(150)의 개도를 조절한다. 제어부(10)는 흡입과열도가 기설정된 범위를 벗어나지 않도록 제 2 메인 팽창밸브(150)의 개도를 조절한다.The control unit 10 adjusts the opening degree of the second main expansion valve 150 according to the suction and the degree of circulation which is a difference between the suction temperature measured by the suction temperature sensor 13 and the evaporation temperature measured by the evaporation temperature sensor 14. [ The control unit 10 adjusts the opening degree of the second main expansion valve 150 so that the suction and the heat are not out of the predetermined range.

제어부(10)는 압축기(110)의 운전속도에 따라 제 1 인젝션 팽창밸브(171)의 개도를 조절한다. 압축기(110)의 운전속도는 압축기(110)에 포함된 냉매를 압축하기 위하여 회전력을 발생하는 모터(미도시)의 회전속도로서 주파수 단위로 나타낼 수 있다. 압축기(110)의 운전속도는 압축기(110)의 압축능력과 비례한다. 제어부(10)는 압축기(110)의 운전속도에 따라 제 1 인젝션 팽창밸브(171)의 개도를 조절하거나 제 1 인젝션 팽창밸브(171)를 폐쇄한다.The control unit 10 adjusts the opening degree of the first injection expansion valve 171 according to the operation speed of the compressor 110. The operation speed of the compressor 110 may be expressed in terms of frequency as a rotation speed of a motor (not shown) that generates a rotational force to compress the refrigerant contained in the compressor 110. The operation speed of the compressor 110 is proportional to the compressibility of the compressor 110. The control unit 10 adjusts the opening degree of the first injection expansion valve 171 or closes the first injection expansion valve 171 according to the operation speed of the compressor 110.

제어부(10)는 인젝션 증발 온도센서(16)가 측정한 인젝션 증발온도와 인젝션 팽창 온도센서(15)가 측정한 인젝션 팽창온도의 차인 인젝션 과열도에 따라 제 2 인젝션 팽창밸브(172)의 개도를 조절한다. 제어부(10)는 인젝션 과열도가 기설정된 값 이내가 되도록 제 2 인젝션 팽창밸브(172)의 개도를 조절한다.The control unit 10 calculates the opening degree of the second injection expansion valve 172 according to the injection superheat degree which is the difference between the injection evaporation temperature measured by the injection evaporation temperature sensor 16 and the injection expansion temperature measured by the injection expansion temperature sensor 15 . The control unit 10 adjusts the opening degree of the second injection expansion valve 172 so that the injection superheating degree is within a predetermined value.

도 3은 본 발명의 일 실시예에 따른 공기조화기의 작동시 압력-엔탈피 선도(Pressure-Enthalpy Diagram, 이하 P-h 선도)를 나타내는 도면이다.FIG. 3 is a view showing a pressure-enthalpy diagram (hereinafter referred to as P-h line) during operation of the air conditioner according to an embodiment of the present invention.

도 1 및 도 3을 참조하여 본 발명의 일 실시예에 따른 공기조화기의 작용을 설명하면 다음과 같다.The operation of the air conditioner according to an embodiment of the present invention will be described with reference to FIGS. 1 and 3. FIG.

압축기(110)에서 압축된 냉매는 토출포트(114)를 통하여 토출된다. 토출포트(114)로 토출된 냉매는 b 지점을 거쳐 응축기(120)로 유동된다.The refrigerant compressed in the compressor (110) is discharged through the discharge port (114). The refrigerant discharged to the discharge port 114 flows to the condenser 120 via the point b.

응축기(120)로 유동된 냉매는 공기와 열교환을 하여 응축된다. 공기조화기가 냉방기인 경우 응축기(120)로 유동된 냉매는 실외공기와 열교환을 하며, 공기조화기가 난방기인 경우 응축기(120)로 유동된 냉매는 실내공기와 열교환을 한다.The refrigerant flowing into the condenser 120 undergoes heat exchange with the air and is condensed. When the air conditioner is a radiator, the refrigerant flowing into the condenser 120 performs heat exchange with the outdoor air. When the air conditioner is a radiator, the refrigerant flowing into the condenser 120 performs heat exchange with the room air.

응축기(120)에서 응축된 냉매는 c 지점을 거쳐 제 1 메인 팽창밸브(140)에서 팽창된다. 제 1 메인 팽창밸브(140)는 토출과열도에 따라 개도가 조절된다. 제 1 메인 팽창밸브(140)에서 팽창된 냉매는 d 지점을 거쳐 인젝션 모듈(170)로 유동된다.The refrigerant condensed in the condenser 120 is expanded at the first main expansion valve 140 via the point c. The opening degree of the first main expansion valve 140 is adjusted according to the discharge and the degree of the circulation. The refrigerant expanded at the first main expansion valve 140 flows to the injection module 170 via the point d.

인젝션 모듈(170)로 유동된 냉매는 인젝션 기액분리기(174)로 유입된다. 인젝션 기액분리기(174)로 유입된 냉매는 기상냉매와 액상냉매로 분리된다.The refrigerant flowing into the injection module 170 flows into the injection gas-liquid separator 174. The refrigerant introduced into the injecting gas-liquid separator 174 is separated into the gaseous refrigerant and the liquid refrigerant.

인젝션 기액분리기(174)에서 분리된 기상냉매는 제 1 인젝션 팽창밸브(171)로 유동되어 팽창된다. 제 1 인젝션 팽창밸브(171)에서 팽창된 냉매는 압축기(110)의 제 3 유입포트(113)를 통하여 압축기(110)의 고압측으로 인젝션된다.The gaseous refrigerant separated by the injection gas-liquid separator 174 flows to the first injection expansion valve 171 and is expanded. The refrigerant expanded at the first injection expansion valve 171 is injected into the high pressure side of the compressor 110 through the third inlet port 113 of the compressor 110. [

인젝션 기액분리기(174)에서 분리된 액상냉매는 인젝션 열교환기(173)에 의하여 과냉각된다. 인젝션 기액분리기(174) 내에서 과냉각된 액상냉매는 e 지점을 거쳐 일부는 제 2 인젝션 팽창밸브(172)로 유동되고 다른 일부는 제 2 메인 팽창밸브(150)로 유동된다.The liquid refrigerant separated in the injection gas-liquid separator 174 is supercooled by the injection heat exchanger 173. Liquid refrigerant in the injection gas-liquid separator 174 is flowed to the second injection expansion valve 172 via the point e and a part of the liquid refrigerant flows to the second main expansion valve 150.

제 2 인젝션 팽창밸브(172)로 유동된 냉매는 팽창되어 f 지점을 거쳐 인젝션 열교환기(173)로 유동된다. 제 2 인젝션 팽창밸브(172)는 인젝션 과열도에 따라 개도가 조절된다.The refrigerant flowing into the second injection expansion valve 172 is expanded and flows to the injection heat exchanger 173 via the point f. The opening degree of the second injection expansion valve 172 is adjusted according to the injection superheating degree.

제 2 인젝션 팽창밸브(172)에서 팽창되어 인젝션 열교환기(173)로 유동된 냉매는 가열되어 증발된다. 인젝션 열교환기(173)에서 증발된 냉매는 g 지점을 거쳐 제 2 유입포트(112)를 통하여 압축기(110)의 저압측으로 인젝션된다.The refrigerant expanded at the second injection expansion valve 172 and flowing to the injection heat exchanger 173 is heated and evaporated. The refrigerant evaporated in the injection heat exchanger 173 is injected to the low pressure side of the compressor 110 through the second inlet port 112 via the point g.

인젝션 모듈(170)의 인젝션 기액분리기(174)에서 제 2 메인 팽창밸브(150)로 유동된 냉매는 팽창된다. 제 2 메인 팽창밸브(150)는 흡입과열도에 따라 개도가 조절된다. 제 2 메인 팽창밸브(150)에서 팽창된 냉매는 h 지점을 거쳐 증발기(130)로 유동된다.The refrigerant flowing from the injection gas-liquid separator 174 of the injection module 170 to the second main expansion valve 150 is expanded. The opening degree of the second main expansion valve 150 is adjusted according to the suction and the degree of the heat. The refrigerant expanded at the second main expansion valve 150 flows to the evaporator 130 through the point h.

증발기(130)로 유동된 냉매는 공기와 열교환하여 증발된다. 공기조화기가 냉방기인 경우 증발기(130)로 유동된 냉매는 실내공기와 열교환을 하며, 공기조화기가 난방기인 경우 증발기(130)로 유동된 냉매는 실외공기와 열교환을 한다.The refrigerant flowing into the evaporator 130 is heat-exchanged with the air and evaporated. When the air conditioner is a radiator, the refrigerant flowing into the evaporator 130 performs heat exchange with the room air. When the air conditioner is a radiator, the refrigerant flowing into the evaporator 130 performs heat exchange with the outdoor air.

증발기(130)에서 증발된 냉매는 i 지점 및 a 지점을 거쳐 압축기(110)의 제 1 유입포트(111)로 유동된다. 제 1 유입포트(111)로 유동된 냉매는 압축기(110)에서 압축되며 제 2 유입포트(112) 및 제 3 유입포트(113)로 인젝션된 냉매와 합류한다. 압축기(110)에서 압축된 냉매는 토출포트(114)로 토출된다.The refrigerant evaporated in the evaporator 130 flows to the first inlet port 111 of the compressor 110 through the point i and the point a. The refrigerant flowing into the first inlet port 111 is compressed by the compressor 110 and merges with the refrigerant injected into the second inlet port 112 and the third inlet port 113. The refrigerant compressed in the compressor (110) is discharged to the discharge port (114).

도 3을 참조하면, 압축기(110)의 토출포트(114), 응축기(120), 인젝션 기액분리기(174), 제 1 인젝션 팽창밸브(171) 및 압축기(110)의 제 3 유입포트(113)가 하나의 사이클을 이루며 하나의 인젝션 단계를 형성한다. 또한, 압축기(110)의 토출포트(114), 응축기(120), 인젝션 기액분리기(174), 제 2 인젝션 팽창밸브(172), 인젝션 열교환기(173) 및 압축기(110)의 제 2 유입포트(112)가 하나의 사이클을 이루며 또 하나의 인젝션 단계를 형성한다.3, the discharge port 114 of the compressor 110, the condenser 120, the injection gas-liquid separator 174, the first injection expansion valve 171, and the third inlet port 113 of the compressor 110, Constitute one cycle and form one injection step. The second inlet port of the compressor 110 is connected to the discharge port 114 of the compressor 110, the condenser 120, the injection gas-liquid separator 174, the second injection expansion valve 172, the injection heat exchanger 173, (112) form one cycle and form another injection step.

이상에서는 본 발명의 바람직한 실시예에 대하여 도시하고 설명하였지만, 본 발명은 상술한 특정의 실시예에 한정되지 아니하며, 특허청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 의해 다양한 변형실시가 가능한 것은 물론이고, 이러한 변형실시들은 본 발명의 기술적 사상이나 전망으로부터 개별적으로 이해되어서는 안될 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 exemplary embodiments, but, on the contrary, It should be understood that various modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.

110: 압축기
120: 응축기
130: 증발기
140: 제 1 메인 팽창밸브
150: 제 2 메인 팽창밸브
170: 인젝션 모듈
171: 제 1 인젝션 팽창밸브
172: 제 2 인젝션 팽창밸브
173: 인젝션 열교환기
174: 인젝션 기액분리기110: compressor
120: condenser
130: Evaporator
140: first main expansion valve
150: second main expansion valve
170: Injection module
171: First injection expansion valve
172: second injection expansion valve
173: Injection heat exchanger
174: Injection gas-liquid separator

Claims (7)

냉매를 압축하는 압축기;
상기 압축기에서 압축된 냉매를 응축하는 응축기;
상기 응축기에서 응축된 냉매를 증발하는 증발기; 및
상기 응축기에서 상기 증발기로 유동되는 냉매를 기상냉매와 액상냉매로 분리하고 분리된 기상냉매를 팽창하여 상기 압축기로 인젝션하고 분리된 액상냉매의 일부를 팽창한 후 증발하여 상기 압축기로 인젝션하는 인젝션 모듈을 포함하는 공기조화기.A compressor for compressing the refrigerant;
A condenser for condensing the refrigerant compressed in the compressor;
An evaporator for evaporating the refrigerant condensed in the condenser; And
An injection module for separating the refrigerant flowing from the condenser into the vaporizer into a gaseous refrigerant and a liquid refrigerant, injecting the separated gaseous refrigerant into the compressor, expanding a part of the separated liquid refrigerant, and evaporating and injecting the refrigerant into the compressor Included air conditioners. 제 1 항에 있어서,
상기 응축기와 상기 인젝션 모듈 사이에 배치되어 냉매를 팽창하는 제 1 메인 팽창밸브; 및
상기 인젝션 모듈과 상기 증발기 사이에 배치되어 냉매를 팽창하는 제 2 메인 팽창밸브를 더 포함하는 공기조화기.The method according to claim 1,
A first main expansion valve disposed between the condenser and the injection module for expanding the refrigerant; And
And a second main expansion valve disposed between the injection module and the evaporator for expanding the refrigerant. 제 2 항에 있어서,
상기 제 1 메인 팽창밸브는 상기 압축기에서 토출되는 냉매의 온도와 상기 응축기에서 응축되는 냉매의 온도의 차인 토출과열도에 따라 제어되는 공기조화기.3. The method of claim 2,
Wherein the first main expansion valve is controlled according to the discharge and the degree of the heat, which is a difference between the temperature of the refrigerant discharged from the compressor and the temperature of the refrigerant condensed in the condenser. 제 2 항에 있어서,
상기 제 2 메인 팽창밸브는 상기 압축기로 흡입되는 냉매의 온도와 상기 증발기에서 증발되는 냉매의 온도의 차인 흡입과열도에 따라 제어되는 공기조화기.3. The method of claim 2,
Wherein the second main expansion valve is controlled according to the suction and the degree of the difference between the temperature of the refrigerant sucked into the compressor and the temperature of the refrigerant evaporated in the evaporator. 냉매를 압축하는 압축기;
상기 압축기에서 압축된 냉매를 응축하는 응축기;
상기 응축기에서 응축된 냉매를 증발하는 증발기;
상기 응축기와 상기 증발기 사이에 배치되어 유동되는 냉매를 기상냉매와 액상냉매로 분리하는 인젝션 기액분리기;
상기 인젝션 기액분리기와 상기 압축기에 연결되어 상기 인젝션 기액분리기에서 분리된 기상냉매를 팽창하는 제 1 인젝션 팽창밸브;
상기 인젝션 기액분리기에 연결되어 분리된 액상냉매의 일부를 팽창하는 제 2 인젝션 팽창밸브; 및
상기 제 2 인젝션 팽창밸브와 상기 압축기에 연결되고 상기 인젝션 기액분리기 내에 배치되어 상기 제 2 인젝션 팽창밸브에서 팽창된 냉매를 증발하는 인젝션 열교환기를 포함하는 공기조화기.A compressor for compressing the refrigerant;
A condenser for condensing the refrigerant compressed in the compressor;
An evaporator for evaporating the refrigerant condensed in the condenser;
An injecting gas-liquid separator for separating refrigerant flowing between the condenser and the evaporator and flowing into a gaseous refrigerant and a liquid-phase refrigerant;
A first injection expansion valve connected to the injection gas-liquid separator and the compressor to expand the gaseous refrigerant separated in the injection gas-liquid separator;
A second injection expansion valve connected to the injection gas-liquid separator to expand a part of the separated liquid refrigerant; And
And an injection heat exchanger connected to the second injection expansion valve and the compressor and disposed in the injection gas-liquid separator to evaporate the refrigerant expanded in the second injection expansion valve. 제 5 항에 있어서,
상기 제 2 인젝션 팽창밸브에서 팽창된 냉매의 온도를 측정하는 인젝션 팽창 온도센서; 및
상기 인젝션 열교환기에서 증발된 냉매의 온도를 측정하는 인젝션 증발온도센서를 더 포함하는 공기조화기.6. The method of claim 5,
An injection expansion temperature sensor for measuring the temperature of the refrigerant expanded in the second injection expansion valve; And
And an injection evaporation temperature sensor for measuring the temperature of the refrigerant evaporated in the injection heat exchanger. 제 5 항에 있어서,
제 2 인젝션 팽창밸브는 상기 인젝션 증발 온도센서가 측정한 온도와 상기 인젝션 팽창 온도센서가 측정한 온도의 차인 인젝션 과열도에 따라 제어되는 공기조화기.6. The method of claim 5,
Wherein the second injection expansion valve is controlled according to an injection superheat degree which is a difference between a temperature measured by the injection evaporation temperature sensor and a temperature measured by the injection expansion temperature sensor.
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