WO2014155545A1 - Air conditioner - Google Patents
Air conditioner Download PDFInfo
- Publication number
- WO2014155545A1 WO2014155545A1 PCT/JP2013/058900 JP2013058900W WO2014155545A1 WO 2014155545 A1 WO2014155545 A1 WO 2014155545A1 JP 2013058900 W JP2013058900 W JP 2013058900W WO 2014155545 A1 WO2014155545 A1 WO 2014155545A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- refrigerant
- indoor
- air conditioner
- expansion valve
- heat exchanger
- Prior art date
Links
Images
Classifications
-
- 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
- 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
- F25B13/00—Compression machines, plants or systems, with reversible 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/005—Outdoor unit 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
- F25B2500/00—Problems to be solved
- F25B2500/12—Sound
-
- 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
- F25B2700/193—Pressures of the compressor
- F25B2700/1931—Discharge pressures
-
- 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
- F25B2700/21163—Temperatures of a condenser of the refrigerant at the outlet 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
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
Definitions
- the present invention relates to a control method of an air conditioner, and is particularly suitable for suppressing the flow noise of a refrigerant during heating operation when R32 is employed as the refrigerant.
- Patent No. 3956589 Patent No. 3435626 gazette
- the air conditioner can increase the operation efficiency of the refrigeration cycle by controlling the heat exchanger outlet acting as the evaporator near the saturated gas.
- R32 which is a refrigerant having a relatively low global warming potential, has a refrigerant temperature on the discharge side of the compressor 10 to 15 ° C. higher than that of R410A, which is a conventional refrigerant.
- R410A which is a conventional refrigerant.
- the refrigerant on the outlet side of the outdoor heat exchanger which acts as an evaporator during heating operation, is operated in a wet state to reduce the amount of refrigerant on the inlet side of the compressor, the amount of refrigerant stored in the evaporator is large. Become. Then, the degree of supercooling on the outlet side of the indoor heat exchanger acting as a condenser is insufficient, and a gas-liquid two-phase state occurs, so there is a problem that refrigerant flow noise is generated from the indoor unit due to the gas-liquid two-phase state .
- the present invention is an air conditioner in which a single refrigerant of R32 or a mixed refrigerant containing 70% or more of R32 is enclosed in a refrigerant circulating in a refrigeration cycle, which is comfortable by suppressing the refrigerant flow noise in the indoor expansion valve during heating operation.
- the purpose is to improve the quality.
- the present application “connects an outdoor unit equipped with a compressor and an outdoor heat exchanger with an indoor unit equipped with an indoor heat exchanger and an indoor expansion valve using liquid piping and gas piping.
- a refrigeration cycle in which a refrigeration cycle is configured and a refrigerant circulating R32 alone or a mixed refrigerant containing 70 mass% or more of R32 is enclosed in the refrigerant circulating in the refrigeration cycle, the throttling control by the outdoor expansion valve during heating operation And performing the throttling control by the indoor expansion valve.
- the refrigerant flow noise in the indoor expansion valve is suppressed during heating operation. It is possible to improve comfort.
- refrigerating cycle block diagram of an air conditioner It is an explanatory view of a condenser exit state change by compressor discharge temperature control at the time of heating operation. It is an explanatory view of a refrigerant flow style before an indoor expansion valve at the time of heating operation. It is operation
- FIG. 1 is an example of the refrigerating-cycle block diagram of the multi-room air conditioner of a present Example.
- the outdoor unit 100 includes an outdoor heat exchanger 101, an outdoor fan 102, an outdoor expansion valve 103, a compressor 104, an accumulator 105, a four-way valve 106, a discharge temperature sensor 107, and a discharge pressure sensor 108.
- the indoor unit 200 includes an indoor heat exchanger 201, an indoor fan 202, an indoor expansion valve 203, and a refrigerant liquid temperature sensor 204.
- the outdoor unit 100 and the indoor unit 200 are connected by a liquid pipe 121 and a gas pipe 122.
- the high temperature gas refrigerant discharged from the compressor 104 is sent to the outdoor heat exchanger 101 through the four-way valve 106.
- the high temperature gas refrigerant that has entered the outdoor heat exchanger 101 exchanges heat with the outdoor air sent by the outdoor fan 102, condenses, and becomes liquid refrigerant.
- the refrigerant sent to the indoor unit 200 is decompressed by the indoor expansion valve 203 and enters the indoor heat exchanger 201.
- the indoor heat exchanger 201 exchanges heat with indoor air sent by the indoor fan 202 and evaporates to become a gas refrigerant.
- the gas refrigerant leaving the indoor unit 200 is sent to the outdoor unit 100 through the gas pipe 122.
- the gas refrigerant that has entered the outdoor unit 100 enters the accumulator 105 through the four-way valve 106.
- the accumulator 105 acts as a buffer tank for storing liquid refrigerant when the liquid refrigerant returns transiently, and prevents liquid compression due to the liquid refrigerant returning to the compressor 104. Under normal conditions, gas refrigerant enters the accumulator 104 from the accumulator 105 and is compressed.
- the high temperature gas refrigerant discharged from the compressor 104 is sent to the gas pipe 122 through the four-way valve 106.
- the high temperature gas refrigerant that has entered the gas piping 122 is sent to the indoor unit 200.
- the high temperature gas refrigerant that has entered the indoor unit 200 exchanges heat with the indoor air sent by the indoor fan 202 in the indoor heat exchanger 201 and condenses to become liquid refrigerant, and passes through the indoor expansion valve 203 from the indoor unit 200 Get out. Heating is performed by heat exchange between the high temperature refrigerant and the indoor air in the indoor heat exchanger 200.
- the liquid refrigerant that has left the indoor unit 200 then flows to the outdoor unit 100 via the liquid pipe 121.
- the liquid refrigerant that has entered the outdoor unit 100 is decompressed when passing through the outdoor expansion valve 103 and enters the outdoor heat exchanger 101.
- the outdoor heat exchanger 101 exchanges heat with the outdoor air sent by the outdoor fan 102 and evaporates to become a gas refrigerant.
- Gas refrigerant enters accumulator 105 through four-way valve 106.
- the accumulator 105 acts as a buffer tank when a large amount of liquid refrigerant passes through transiently, and prevents the compressor from being damaged by liquid compression. Under normal conditions, gas refrigerant enters the accumulator 104 from the accumulator 105 and is compressed.
- the refrigerant liquid temperature sensor 204 of the indoor unit 200 detects the temperature of the refrigerant that has left the indoor heat exchanger 201. Further, the discharge pressure of the compressor 104 is detected by the discharge pressure sensor 108 of the outdoor unit 100. From the outlet side of the compressor 104 to the outlet side of the indoor heat exchanger 201, the pressure loss is relatively small because the refrigerant is in a high pressure state. Therefore, the degree of subcooling of the outlet side of the indoor heat exchanger 201 can be estimated by the following equation (1).
- SC Tsat (Pd) -TL-C (1)
- SC (K) is the degree of supercooling at the indoor heat exchanger outlet
- Tsat () is the saturation temperature of pressure
- Pd is the compressor discharge pressure (MPa)
- TL is the indoor heat exchanger outlet temperature (° C)
- C is It is a correction factor related to the refrigerant pressure loss.
- FIG. 2 is an explanatory view of a state change on the outlet side of the condenser due to the discharge temperature suppression of the compressor 104 during the heating operation of the air conditioner using the R32 refrigerant.
- the discharge temperature tends to be higher than when using the refrigerant R410A due to the influence of the refrigerant physical properties.
- a condition in which the discharge temperature tends to be high includes a heating operation at a low temperature outside air where the pressure ratio of the compressor 104 tends to be large.
- FIG. 2 is a Mollier diagram showing the operating condition at the low heating temperature, and the operating condition shown by the solid line is the degree of superheat SH (K) of a slight amount (2 to 3 K) as the refrigerant state on the suction side of the compressor 104. It shows the state of operation with the mark attached.
- the discharge temperature Td1 of the compressor 104 may exceed the reliability upper limit allowable temperature (for example, 120 ° C.) of the compressor 104. Therefore, by increasing the opening degree of the outdoor expansion valve 103, the refrigerant on the suction side of the compressor 104 is made wet (suction dryness Xs), and the discharge temperature of the compressor 104 is set to Td2 (for example, 100 ° C.). It is desirable to lower it. As a result, deterioration of the compressor 104 such as deterioration of refrigeration oil and polymer material in the compressor 104 and demagnetization of a rare earth magnet can be prevented.
- the suction dryness of the compressor 104 be Xs> 0.85.
- the suction dryness is a value obtained by dividing the refrigerant gas mass flow by the refrigerant total mass flow, and suction dryness ⁇ refrigerant gas mass flow / refrigerant total mass flow, and refrigerator oil in the refrigerant is excluded. It shall be. Therefore, the compressor 104 is made to suck in the refrigerant whose suction dryness is Xs> 0.85.
- the suction degree Xs of the compressor 104 when the suction degree Xs of the compressor 104 is decreased, the degree of the degree of abrasion also becomes low at the accumulator 105 located on the upstream side and the outlet side of the outdoor heat exchanger 101 acting as an evaporator. Therefore, the amount of refrigerant stored inside the accumulator 105 and the outdoor heat exchanger 101 is increased. Then, since the total amount of refrigerant in the cycle remains unchanged, the amount of refrigerant held in the indoor heat exchanger 201 acting as a condenser decreases, and as shown by Xco in FIG. 2, the outlet side of the indoor heat exchanger 201.
- An indoor expansion valve 203 is installed at the outlet side of the indoor heat exchanger 201, and generates a refrigerant flow noise depending on the state of the refrigerant passing through, and generates noise to the occupant as abnormal noise from the indoor unit 200 of the air conditioner. It will cause discomfort.
- FIG. 3 is a flow pattern determination diagram (Heiwitt-Roberts diagram) in the vertical upward flow (Source: Gas-Liquid Two-Phase Flow Handbook, page 10, Nippon Opportunity Society, 1989).
- This FIG. 3 is used to estimate the refrigerant flow mode in the piping portion on the inlet side of the indoor expansion valve 203 during heating operation.
- the horizontal axis of FIG. 3 shows the apparent momentum L L (j L ) 2 of the liquid refrigerant, where ⁇ L is the liquid refrigerant density (kg / m 3 ) and j L (m / s) It is the apparent flow rate of the liquid refrigerant that the liquid refrigerant flowed to satisfy the entire cross-sectional area.
- ⁇ G is the gas refrigerant density (kg / m 3 ) and j G (m / s) It is an apparent flow rate of the gas refrigerant in which the gas refrigerant flowed so as to satisfy the entire cross-sectional area.
- the divided regions in Fig. 3 are the types of flow modes such as slag flow, churn flow, and annular flow, and an approximate flow mode can be estimated by examining which region they are in. can do.
- the state at the time of heating operation is put on a diagram, it can be shown by ⁇ for pipe diameter 10.7 mm, ⁇ for 7.93 mm, and ⁇ for 5.0 mm.
- the refrigerant flow noise is particularly unpleasant in the region of slug flow or churn flow where gas clumps intermittently pass through the expansion valve, and it is desirable to always avoid this region, for example in the region of bubbly flow .
- the area on the upper right side is considered to be the area of bubble flow.
- the displacement control of the compressor 104 it is difficult to reduce the refrigerant flow noise by narrowing the inner diameter of the pipe in this manner because the refrigerant circulation amount is not constant.
- the refrigerant R32 when the indoor unit is shared, the refrigerant R32 has a smaller refrigerant flow rate than the refrigerant R410A if the pipe inner diameter does not change. be able to.
- the flow velocity of the refrigerant since the flow velocity of the refrigerant is reduced, the flow of the refrigerant may be more likely to occur in the region of the slag flow or the churn flow, and the refrigerant flow noise may occur due to the outlet side of the indoor heat exchanger 201 becoming the two phase region.
- FIG. 4 is operation
- suction suction degree Xs is controlled to, for example, about 0.9 for suppression of discharge temperature
- the pressure reduction amount is small as ⁇ Pexpi, and it is provided in front of the outdoor heat exchanger 101 acting as an evaporator.
- the pressure reduction amount ⁇ Pexpo at the outdoor expansion valve 103 which is located is largely controlled.
- the degree of dryness of the liquid pipe 121 at this time is XLp.
- the air conditioner of the present embodiment when the degree of subcooling is determined to be zero using the above-described arithmetic expression (1) of the degree of subcooling at the outlet of the indoor heat exchanger 201, indoor expansion is performed.
- the valve 203 is controlled to squeeze.
- the amount of pressure reduction by the indoor expansion valve 203 becomes large as ⁇ Pexpi ′, so the degree of dryness is increased up to the degree of dryness XLp ′ of the liquid pipe.
- the amount of refrigerant held in the liquid pipe 121 can be reduced, and the amount of refrigerant held in the indoor heat exchanger 201, which has run short, can be increased.
- the refrigerant state on the outlet side of the indoor heat exchanger 201 can be made into a liquid state by securing the subcooling degree SC of 2 to 3 K or more. Therefore, it is possible to prevent the generation of the unpleasant refrigerant flow noise generated in the indoor expansion valve 203.
- the indoor unit is shared from the indoor unit using the refrigerant R410A in the air conditioner using the refrigerant R410A and the air conditioner using the refrigerant R32, that is, when the indoor unit is shared. Even if the inner diameter of the pipe does not change, the control method of this embodiment can reduce unpleasant refrigerant flow noise.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
Description
そこで本発明は、冷凍サイクルを循環する冷媒にR32単一又はR32を70質量%以上含む混合冷媒が封入された空気調和機において、暖房運転時に室内膨張弁における冷媒流動音を抑制することで快適性の向上を図ることを目的とする。 The air conditioner can increase the operation efficiency of the refrigeration cycle by controlling the heat exchanger outlet acting as the evaporator near the saturated gas. Here, R32, which is a refrigerant having a relatively low global warming potential, has a refrigerant temperature on the discharge side of the
Therefore, the present invention is an air conditioner in which a single refrigerant of R32 or a mixed refrigerant containing 70% or more of R32 is enclosed in a refrigerant circulating in a refrigeration cycle, which is comfortable by suppressing the refrigerant flow noise in the indoor expansion valve during heating operation. The purpose is to improve the quality.
室外機100は、室外熱交換器101、室外ファン102、室外膨張弁103、圧縮機104、アキュムレータ105、四方弁106、吐出温度センサ107、吐出圧力センサ108で構成されている。室内機200は、室内熱交換器201、室内ファン202、室内膨張弁203、冷媒液側温度センサ204で構成されている。室外機100と室内機200は液配管121とガス配管122で接続されている。 FIG. 1: is an example of the refrigerating-cycle block diagram of the multi-room air conditioner of a present Example.
The
冷房運転時は、圧縮機104から吐出した高温のガス冷媒は四方弁106を通って室外熱交換器101へ送られる。室外熱交換器101へ入った高温のガス冷媒は室外ファン102によって送られた室外空気と熱交換して凝縮して、液冷媒になる。その後、室外膨張弁103を通過後、液配管121を介して室内機200へ送られる。室内機200へ送られた冷媒は、室内膨張弁203で減圧されて室内熱交換器201へ入る。室内熱交換器201で室内ファン202によって送られた室内空気と熱交換して蒸発して、ガス冷媒になる。この時、室内機200から冷風が室内に送られて冷房が行われる。室内機200を出たガス冷媒は、ガス配管122を介して室外機100へ送られる。室外機100に入ったガス冷媒は四方弁106を通ってアキュムレータ105へ入る。アキュムレータ105は過渡的に液冷媒が戻った際に液冷媒を貯めるバッファタンクとして作用し、圧縮機104に液冷媒が戻ることによる液圧縮を防止する。通常時にはガス冷媒がアキュムレータ105から圧縮機104へ入り圧縮される。 Next, the operation will be described.
During the cooling operation, the high temperature gas refrigerant discharged from the
SC=Tsat(Pd)-TL-C ・・・ (1)
ここで、SC(K)は室内熱交換器出口過冷却度、Tsat( )は圧力の飽和温度、Pdは圧縮機吐出圧力(MPa)、TLは室内熱交換器出口温度(℃)、Cは冷媒圧力損失に関わる補正係数である。
また、SC≦0(K)と算出された場合には、室内熱交換器201の出口側では気液二相状態と判定することができる。 During the heating operation, the refrigerant
SC = Tsat (Pd) -TL-C (1)
Here, SC (K) is the degree of supercooling at the indoor heat exchanger outlet, Tsat () is the saturation temperature of pressure, Pd is the compressor discharge pressure (MPa), TL is the indoor heat exchanger outlet temperature (° C), C is It is a correction factor related to the refrigerant pressure loss.
When SC ≦ 0 (K) is calculated, the outlet side of the
冷媒R32を単一で又は70%以上の割合で使用する空気調和機においては、冷媒物性の影響により冷媒R410Aを使用した場合に比べて吐出温度が高くなる傾向がある。特に吐出温度の高くなりやすい条件としては、圧縮機104の圧力比が大きくなりやすい外気低温での暖房運転が挙げられる。 FIG. 2 is an explanatory view of a state change on the outlet side of the condenser due to the discharge temperature suppression of the
In an air conditioner that uses the refrigerant R32 singly or in a proportion of 70% or more, the discharge temperature tends to be higher than when using the refrigerant R410A due to the influence of the refrigerant physical properties. In particular, a condition in which the discharge temperature tends to be high includes a heating operation at a low temperature outside air where the pressure ratio of the
図4は本実施例の室内膨張弁203の制御による暖房運転時の冷媒流動音抑制の動作説明図である。吐出温度抑制のために吸入かわき度Xsを例えば0.9程度に制御すると、前述のように室内熱交換器201の出口側の冷媒は気液二相状態(かわき度Xco=0.01~0.1程度)になるが、このとき、室内膨張弁203はほぼ全開状態に制御されているため、その減圧量はΔPexpiと小さく、蒸発器として作用する室外熱交換器101の前に設けられている室外膨張弁103での減圧量ΔPexpoは大きく制御されている。このときの液配管121のかわき度はXLpである。 Therefore, in the air conditioner of the present embodiment, the indoor expansion valve control shown in FIG. 4 is performed.
FIG. 4: is operation | movement explanatory drawing of refrigerant | coolant flowing noise suppression at the time of heating operation by control of the
101 室外熱交換器
102 室外ファン
103 室外膨張弁
104 圧縮機
105 アキュムレータ
106 四方弁
107 吐出温度センサ
108 吐出圧力センサ
121 液配管
122 ガス配管
200 室内機
201 室内熱交換器
202 室内ファン
203 室内膨張弁
204 冷媒液側温度センサ 100 air conditioner
Claims (4)
- 圧縮機及び室外熱交換器を備えた室外機と、室内熱交換器、室内膨張弁を備えた室内機とを、液配管及びガス配管を用いて接続することで冷凍サイクルを構成し、
該冷凍サイクルを循環する冷媒にR32単一又はR32を70質量%以上含む混合冷媒が封入された空気調和機において、
暖房運転時に、前記室外膨張弁による絞り制御を行うとともに、前記室内膨張弁による絞り制御を行うことを特徴とする空気調和機。 A refrigeration cycle is configured by connecting an outdoor unit provided with a compressor and an outdoor heat exchanger with an indoor unit provided with an indoor heat exchanger and an indoor expansion valve using liquid piping and gas piping,
In an air conditioner in which a single refrigerant of R32 or a mixed refrigerant containing 70% by mass or more of R32 is sealed in a refrigerant circulating in the refrigeration cycle,
An air conditioner characterized by performing throttling control by the outdoor expansion valve and throttling control by the indoor expansion valve at the time of heating operation. - 請求項1に記載の空気調和機において、
暖房運転時に前記室内熱交換器の出口側の過冷却度が設定値以下となった場合に、前記室外膨張弁による絞り制御を行うとともに、さらに前記室内膨張弁による絞り制御を行うことを特徴とする空気調和機。 In the air conditioner according to claim 1,
In the heating operation, when the degree of subcooling on the outlet side of the indoor heat exchanger becomes equal to or less than a set value, the throttling control by the outdoor expansion valve is performed, and the throttling control by the indoor expansion valve is further performed. Air conditioner. - 請求項1又は2に記載の空気調和機において、
前記圧縮機には吸入乾き度Xsが0.85より大きい冷媒が吸入されることを特徴とする空気調和機。 The air conditioner according to claim 1 or 2
An air conditioner characterized in that a refrigerant having a suction dryness Xs of more than 0.85 is sucked into the compressor. - 請求項1又は2に記載の空気調和機において、
前記室内機は、冷媒R410Aを用いた室内機から共用して用いられたことを特徴とする空気調和機。 The air conditioner according to claim 1 or 2
An air conditioner characterized in that the indoor unit is shared from an indoor unit using a refrigerant R410A.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2013/058900 WO2014155545A1 (en) | 2013-03-27 | 2013-03-27 | Air conditioner |
CN201380073435.2A CN105143786B (en) | 2013-03-27 | 2013-03-27 | Air conditioner |
JP2015507754A JP6224079B2 (en) | 2013-03-27 | 2013-03-27 | Air conditioner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2013/058900 WO2014155545A1 (en) | 2013-03-27 | 2013-03-27 | Air conditioner |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014155545A1 true WO2014155545A1 (en) | 2014-10-02 |
Family
ID=51622625
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2013/058900 WO2014155545A1 (en) | 2013-03-27 | 2013-03-27 | Air conditioner |
Country Status (3)
Country | Link |
---|---|
JP (1) | JP6224079B2 (en) |
CN (1) | CN105143786B (en) |
WO (1) | WO2014155545A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019230436A1 (en) * | 2018-05-31 | 2019-12-05 | 株式会社デンソー | Refrigerant cycle device |
EP3951285A4 (en) * | 2019-03-26 | 2022-12-28 | Fujitsu General Limited | Air conditioning device |
WO2023243022A1 (en) * | 2022-06-16 | 2023-12-21 | 三菱電機株式会社 | Heat pump device |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2018115831A (en) * | 2017-01-20 | 2018-07-26 | ダイキン工業株式会社 | Indoor unit |
EP4047287A4 (en) * | 2019-10-18 | 2023-03-08 | Mitsubishi Electric Corporation | Refrigeration cycle device |
CN112432341A (en) * | 2020-12-08 | 2021-03-02 | 合肥美的暖通设备有限公司 | Control method of air conditioning system, air conditioning system and readable storage medium |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001194015A (en) * | 1999-10-18 | 2001-07-17 | Daikin Ind Ltd | Freezing apparatus |
JP2001227822A (en) * | 2000-02-17 | 2001-08-24 | Mitsubishi Electric Corp | Refrigerating air conditioner |
JP2001295762A (en) * | 2000-04-13 | 2001-10-26 | Daikin Ind Ltd | Compressor and refrigerating system |
JP2007225264A (en) * | 2006-02-27 | 2007-09-06 | Mitsubishi Electric Corp | Air conditioner |
JP2012032108A (en) * | 2010-08-02 | 2012-02-16 | Daikin Industries Ltd | Air conditioning device |
JP2012159216A (en) * | 2011-01-31 | 2012-08-23 | Mitsubishi Electric Corp | Outdoor unit, indoor unit, and air conditioning device |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0571772A (en) * | 1991-09-11 | 1993-03-23 | Matsushita Refrig Co Ltd | Multiroom heating and cooling apparatus |
EP1762794B1 (en) * | 1999-10-18 | 2017-03-22 | Daikin Industries, Ltd. | Refrigerating device |
JP2012030603A (en) * | 2010-07-28 | 2012-02-16 | Tgk Co Ltd | Vehicle air conditioner |
-
2013
- 2013-03-27 CN CN201380073435.2A patent/CN105143786B/en active Active
- 2013-03-27 JP JP2015507754A patent/JP6224079B2/en active Active
- 2013-03-27 WO PCT/JP2013/058900 patent/WO2014155545A1/en active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001194015A (en) * | 1999-10-18 | 2001-07-17 | Daikin Ind Ltd | Freezing apparatus |
JP2001227822A (en) * | 2000-02-17 | 2001-08-24 | Mitsubishi Electric Corp | Refrigerating air conditioner |
JP2001295762A (en) * | 2000-04-13 | 2001-10-26 | Daikin Ind Ltd | Compressor and refrigerating system |
JP2007225264A (en) * | 2006-02-27 | 2007-09-06 | Mitsubishi Electric Corp | Air conditioner |
JP2012032108A (en) * | 2010-08-02 | 2012-02-16 | Daikin Industries Ltd | Air conditioning device |
JP2012159216A (en) * | 2011-01-31 | 2012-08-23 | Mitsubishi Electric Corp | Outdoor unit, indoor unit, and air conditioning device |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019230436A1 (en) * | 2018-05-31 | 2019-12-05 | 株式会社デンソー | Refrigerant cycle device |
JP2019211118A (en) * | 2018-05-31 | 2019-12-12 | 株式会社デンソー | Refrigeration cycle apparatus |
EP3951285A4 (en) * | 2019-03-26 | 2022-12-28 | Fujitsu General Limited | Air conditioning device |
WO2023243022A1 (en) * | 2022-06-16 | 2023-12-21 | 三菱電機株式会社 | Heat pump device |
Also Published As
Publication number | Publication date |
---|---|
CN105143786A (en) | 2015-12-09 |
CN105143786B (en) | 2017-05-10 |
JP6224079B2 (en) | 2017-11-01 |
JPWO2014155545A1 (en) | 2017-02-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2014155545A1 (en) | Air conditioner | |
JP5318099B2 (en) | Refrigeration cycle apparatus and control method thereof | |
JP5240332B2 (en) | Refrigeration equipment | |
US20140290292A1 (en) | Refrigerating and air-conditioning apparatus | |
JP6657613B2 (en) | Air conditioner | |
US10208987B2 (en) | Heat pump with an auxiliary heat exchanger for compressor discharge temperature control | |
JP6540904B2 (en) | Air conditioner | |
JPWO2019171588A1 (en) | Refrigeration cycle equipment | |
JP2011208860A (en) | Air conditioner | |
JP2006250479A (en) | Air conditioner | |
JP2018054237A (en) | Air conditioner | |
EP3109566B1 (en) | Air conditioning device | |
JP2017161193A (en) | Air conditioner | |
JP2019020088A (en) | Freezing unit | |
JP6576603B1 (en) | Air conditioner | |
JP5871723B2 (en) | Air conditioner and control method thereof | |
JP2008039233A (en) | Refrigerating device | |
JP6643630B2 (en) | Air conditioner | |
WO2015182484A1 (en) | Freezer device | |
JP2010032105A (en) | Air conditioner | |
WO2022029845A1 (en) | Air conditioner | |
JP2009293887A (en) | Refrigerating device | |
JP2019020089A (en) | Freezing unit | |
JP2008180435A (en) | Air conditioner | |
JP5908177B1 (en) | Refrigeration cycle apparatus, air conditioner, and control method for refrigeration cycle apparatus |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201380073435.2 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 13880046 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2015507754 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 13880046 Country of ref document: EP Kind code of ref document: A1 |