JP3435743B2 - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JP3435743B2 JP3435743B2 JP21548893A JP21548893A JP3435743B2 JP 3435743 B2 JP3435743 B2 JP 3435743B2 JP 21548893 A JP21548893 A JP 21548893A JP 21548893 A JP21548893 A JP 21548893A JP 3435743 B2 JP3435743 B2 JP 3435743B2
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- refrigerant
- indoor
- air conditioner
- way valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、冷凍サイクルにより除
湿あるいは冷房，暖房，除湿運転が可能な空気調和機に
係る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner capable of dehumidifying or cooling, heating and dehumidifying operations by a refrigeration cycle.
【０００２】[0002]
【従来の技術】従来、除湿運転が可能な空気調和機とし
て、蒸発器により冷却・減湿された空気を再加熱する方
法としては電気ヒータを用いる方式や冷凍サイクルの凝
縮熱を利用する方式などが知られている。2. Description of the Related Art Conventionally, as an air conditioner capable of dehumidifying operation, as a method of reheating air cooled and dehumidified by an evaporator, a method using an electric heater, a method utilizing condensation heat of a refrigeration cycle, etc. It has been known.
【０００３】除湿運転時に冷却された空気を凝縮熱によ
り再加熱する冷凍サイクルとしては、図６に示すよう
に、室内側の熱交換器１０ａ，１０ｂを風路に対して前
後に２分割し、風上側１０ａを蒸発器，風下側１０ｂを
凝縮器とする構成が一般に知られている。分割された部
分間は、途中に二方弁(二方弁Ａ)１２を有する配管でつ
ながれており、この配管と並列にキャピラリチューブ１
７が接続されている。また室外側熱交換器と室内側熱交
換器との間には冷暖房用の絞り装置であるキャピラリチ
ューブ７と二方弁(二方弁Ｂ)６がやはり並列につながれ
ている。As a refrigerating cycle in which the air cooled in the dehumidifying operation is reheated by the heat of condensation, as shown in FIG. 6, the heat exchangers 10a, 10b on the indoor side are divided into two parts in front of and behind the air passage, It is generally known that the windward side 10a is an evaporator and the leeward side 10b is a condenser. The divided parts are connected by a pipe having a two-way valve (two-way valve A) 12 on the way, and the capillary tube 1 is connected in parallel with this pipe.
7 is connected. A capillary tube 7 which is a throttle device for cooling and heating and a two-way valve (two-way valve B) 6 are also connected in parallel between the outdoor heat exchanger and the indoor heat exchanger.
【０００４】除湿運転時には二方弁Ａ１２を閉じ、二方
弁Ｂ６を開ける。室外側の熱交換器４を出た冷媒は高温
高圧の二相状態で室内側熱交換器の風下側１０ｂに流入
する。ここでさらに冷媒は凝縮し、その凝縮熱によって
空気の再加熱が行なわれる。風下側の熱交換器を出た冷
媒は二方弁Ａと並列に接続されているキャピラリチュー
ブ１７を通って減圧され温度が下がる。ついで風上側の
熱交換器１０ａに流入して蒸発し、その蒸発熱によって
空気の冷却・減湿が行なわれる。During the dehumidifying operation, the two-way valve A12 is closed and the two-way valve B6 is opened. The refrigerant discharged from the outdoor heat exchanger 4 flows into the leeward side 10b of the indoor heat exchanger in a two-phase state of high temperature and high pressure. Here, the refrigerant further condenses, and the heat of condensation reheats the air. The refrigerant discharged from the leeward heat exchanger passes through the capillary tube 17 connected in parallel with the two-way valve A, and is decompressed to lower the temperature. Then, it flows into the heat exchanger 10a on the windward side and evaporates, and the heat of evaporation cools and dehumidifies the air.
【０００５】冷暖房運転時には二方弁Ａ１２を開け、二
方弁Ｂ６を閉じる。この時冷媒は二方弁Ｂと並列に接続
された冷暖房用のキャピラリチューブ７を通る。また室
内側では二方弁Ａを通るので減圧されることがなく、室
内側熱交換器全体が蒸発器あるいは凝縮器となる。During cooling / heating operation, the two-way valve A12 is opened and the two-way valve B6 is closed. At this time, the refrigerant passes through the cooling and heating capillary tube 7 connected in parallel with the two-way valve B. Further, since the air passes through the two-way valve A on the indoor side, there is no pressure reduction, and the entire indoor heat exchanger serves as an evaporator or a condenser.
【０００６】以上が、除湿運転に冷凍サイクルを用いた
場合の基本的な構成である。除湿用の絞り装置としては
上述のようにキャピラリチューブの他に例えば実開平１
−９８３８１号公報にあるように二方弁内にブリードポ
ートと呼ばれる小孔を設け、冷暖房運転時には主弁を開
けて冷媒の流れに対して抵抗にならないようにし、除湿
運転時には二方弁の主弁を閉めてブリードポートに冷媒
を通しこれを除湿絞りとするものが公知である。The above is the basic configuration when the refrigeration cycle is used for the dehumidifying operation. As the squeezing device for dehumidification, in addition to the capillary tube as described above, for example, an actual open flat 1
As disclosed in Japanese Patent Publication No. 98381, a small hole called a bleed port is provided in the two-way valve to open the main valve during cooling / heating operation so as not to resist the flow of the refrigerant, and to operate the main of the two-way valve during dehumidification operation. It is known that a valve is closed and a refrigerant is passed through a bleed port to use it as a dehumidifying throttle.
【０００７】[0007]
【発明が解決しようとする課題】高温多湿となる日本の
夏季では除湿運転は不可欠である。この時は空気調和機
からの吹き出し空気の温度は室温より低めにする必要が
ある。また梅雨や秋季の長雨時などでは気温は低いが湿
度は高い気候になる。このような時には空気調和機から
の吹き出し空気の温度は室温と同じか上げぎみに保ちな
がら除湿する必要がある。冷媒の蒸発熱で除湿，凝縮熱
で再加熱する冷凍サイクルを用いた除湿方式は、除湿と
共に吹き出し空気温度を様々に変えうる点で優れてお
り、ヒータ等の補助的な熱源を必要としないので省エネ
ルギーの点からも優れている。Dehumidifying operation is indispensable in the summer of Japan when the temperature and humidity are high. At this time, the temperature of the air blown out from the air conditioner needs to be lower than room temperature. In addition, during the rainy season and long autumn rains, the temperature is low but the humidity is high. In such a case, it is necessary to dehumidify the air blown from the air conditioner while keeping the temperature of the air blown at room temperature or at the highest level. The dehumidification method that uses a refrigeration cycle that dehumidifies with the heat of vaporization of the refrigerant and reheats with the heat of condensation is superior in that the temperature of the blown air can be changed in various ways along with dehumidification, and it does not require an auxiliary heat source such as a heater. It is also excellent in terms of energy saving.
【０００８】室内側の熱交換器を２分割してその間に除
湿用の絞り装置を設ける際、除湿用の絞りとして従来の
ようにキャピラリチューブを用いると、除湿用のキャピ
ラリチューブは通常室内側のユニット内に設けられるの
で、除湿運転時にはキャピラリチューブおよびその前後
で冷媒が二相状態となるため騒音が発生する。その対策
としてキャピラリチューブの出口に太径パイプを接続し
たり、振動吸収用の防振材を付加する必要があった。When a heat exchanger on the indoor side is divided into two parts and a dehumidifying expansion device is provided between them, if a capillary tube is used as a dehumidifying diaphragm as in the prior art, the dehumidifying capillary tube is usually placed on the indoor side. Since it is provided inside the unit, noise is generated during the dehumidifying operation because the refrigerant is in a two-phase state in the capillary tube and in the front and rear thereof. As a countermeasure, it was necessary to connect a large-diameter pipe to the outlet of the capillary tube or add a vibration absorbing material for absorbing vibration.
【０００９】二方弁内にブリードポートを設ける方式は
省スペースの点で優れているものの、除湿運転時には上
記と同様二相状態の冷媒がブリードポートを通過する際
やはり騒音が発生するが、発生源が二方弁の内部である
ため対策が難しい。Although the method of providing the bleed port in the two-way valve is excellent in terms of space saving, noise is still generated when the two-phase refrigerant passes through the bleed port during dehumidification operation as described above. Countermeasures are difficult because the source is inside the two-way valve.
【００１０】また二方弁の代わりに電動膨張弁等の流量
調節弁を用いて、冷暖房運転時には弁の開度を大きくし
て抵抗なく冷媒を流し、除湿運転時には開度を小さくし
て除湿絞りとする場合も、除湿運転時には上記と同様二
相状態の冷媒が弁部を通過する際やはり騒音が発生す
る。Further, a flow control valve such as an electric expansion valve is used instead of the two-way valve to increase the opening of the valve during cooling / heating operation to allow the refrigerant to flow without resistance, and reduce the opening during dehumidification operation to reduce the dehumidification throttle. In such a case as well, during dehumidifying operation, noise is still generated when the refrigerant in the two-phase state passes through the valve portion as described above.
【００１１】本発明が解決しようとする課題は、除湿運
転が可能な冷凍サイクルを有する空気調和機において除
湿運転時の騒音低減に効果のある構造を提供することで
ある。An object of the present invention is to provide a structure effective in reducing noise during dehumidifying operation in an air conditioner having a refrigeration cycle capable of dehumidifying operation.
【００１２】[0012]
【課題を解決するための手段】上記目的は、室外側に配
置された圧縮機及び室外側熱交換器と、室内側に配置さ
れた、除湿運転時に絞りとして動作する絞り装置、及び
この絞り装置を介して接続され除湿運転時に凝縮側熱交
換器として動作する熱交換器と蒸発側熱交換器として動
作する熱交換器とを備えた空気調和機において、前記凝
縮側熱交換器として動作する熱交換器と前記絞り装置と
の間に内部を流れる冷媒を攪拌する機構を備えることに
より達成される。The above object is to provide a compressor and an outdoor heat exchanger arranged on the outdoor side, a throttle device arranged on the indoor side and which operates as a throttle during a dehumidifying operation, and the throttle device. In an air conditioner equipped with a heat exchanger that operates as a heat exchanger on the condensation side and a heat exchanger that operates as the heat exchanger on the evaporation side that are connected via a heat exchanger that operates as the heat exchanger on the condensation side, This is achieved by providing a mechanism for agitating the refrigerant flowing inside between the exchanger and the expansion device.
【００１３】また、望ましくは、前述の絞り装置を内部
に小孔を有する二方弁とし、除湿運転時に、この小孔を
絞りとして用いる。Preferably, the above-mentioned expansion device is a two-way valve having a small hole inside, and this small hole is used as a restriction during dehumidification operation.
【００１４】また、望ましくは、前述の絞り装置を全閉
から全開まで連続的あるいは段階的に調節可能な流量調
節弁とする。Further, it is desirable that the above-mentioned expansion device is a flow control valve which can be adjusted continuously or stepwise from fully closed to fully opened.
【００１５】望ましくは、前述の冷媒を攪拌する機構
を、螺旋状流路とする。Desirably, the mechanism for stirring the above-mentioned refrigerant is a spiral flow path.
【００１６】[0016]
【作用】冷凍サイクルを用いて、冷媒の蒸発熱で空気の
冷却・減湿，凝縮熱で再加熱を行なう除湿運転の場合、
室内側の熱交換器を２分割してその間に除湿用の絞り装
置を設けることになる。実際の構成としては、２分割さ
れた熱交換器の一方から引き出された配管と、もう一方
から引き出された配管との間にキャピラリチューブ，ブ
リードポート等の絞り装置が挿入されることになる。[Operation] In the dehumidifying operation in which the refrigeration cycle is used to cool and dehumidify the air by the heat of evaporation of the refrigerant and reheat it by the heat of condensation,
The indoor heat exchanger is divided into two, and a dehumidifying expansion device is provided between them. As an actual configuration, a throttling device such as a capillary tube or a bleed port is inserted between a pipe drawn from one of the two heat exchangers divided into two and a pipe drawn from the other.
【００１７】除湿運転の際には、２分割された室内側の
熱交換器の一方が凝縮器になり、もう一方が蒸発器にな
る。完全に凝縮しきらない二相流の状態で冷媒が絞り装
置に流入すると配管内で圧力脈動を生じ、時間的に変動
する音が発生する。これは、気相と液相が交互に絞りに
流入して絞り部分で圧力の変動を生じるためである。音
の発生を抑えるためには冷媒を完全に凝縮させて液体に
してしまえばよい。しかし完全に凝縮しきった状態では
空気の再加熱側で潜熱による加熱ができないために再加
熱量が不足し、空気調和機からの吹き出し空気温度が必
要以上に下がってしまう。従って２分割された室内側の
熱交換器の凝縮側では二相流の状態で、除湿用の絞り装
置に流入する直前で完全に凝縮し充分な過冷却度が取れ
るようにするのがよい。しかし例えば気温は低いが湿度
が高いために除湿しながら吹き出し温度を吸い込み温度
よりも上げたいときのように、再加熱量が多めに必要な
場合には充分な過冷却度が取れないまま絞りに冷媒が流
入してしまう場合がある。During the dehumidifying operation, one of the indoor heat exchangers divided into two becomes a condenser and the other becomes an evaporator. When the refrigerant flows into the expansion device in a two-phase flow state where it is not completely condensed, pressure pulsation occurs in the pipe, and a time-varying sound is generated. This is because the gas phase and the liquid phase alternately flow into the throttle to cause pressure fluctuations in the throttle portion. In order to suppress the generation of sound, the refrigerant may be completely condensed into a liquid. However, when the air is completely condensed, the reheat amount of air cannot be heated by latent heat, so that the reheat amount is insufficient and the temperature of air blown out from the air conditioner is lowered more than necessary. Therefore, it is preferable that the condensing side of the indoor heat exchanger divided into two is in a two-phase flow state so that it is completely condensed just before flowing into the dehumidifying expansion device to obtain a sufficient degree of supercooling. However, if the temperature is low but the humidity is high and you want to raise the blowout temperature above the suction temperature while dehumidifying, if a large amount of reheating is required, you can reduce the degree of supercooling without sufficient supercooling. The refrigerant may flow in.
【００１８】問題となるのは気相と液相がそれぞれかな
り大きな体積のまま絞りに流入することである。そこで
本発明のように絞りに流入する前に冷媒を攪拌する機構
を通すことで、気相と液相の混合が起こり、気泡が液中
に混ざった状態となる。このような状態で絞りに流入す
れば圧力の変動は小さくなり、時間的に変動する音の発
生が抑えられる。The problem is that the gas phase and the liquid phase respectively flow into the restrictor with a considerably large volume. Therefore, as in the present invention, by passing through a mechanism that agitates the refrigerant before flowing into the throttle, mixing of the gas phase and the liquid phase occurs, and bubbles are mixed in the liquid. If it flows into the throttle in such a state, the fluctuation of the pressure becomes small, and the generation of a sound that fluctuates with time is suppressed.
【００１９】特に、冷媒を攪拌する機構として螺旋状流
路とすれば、この螺旋状流路に冷媒を通すと、冷媒の進
行方向に対して垂直な面内で遠心力による２次流れのた
めに強い攪拌作用か生じる。この攪拌作用によって気相
と液相の混合が起こり、細かな気泡が液中に均質に混ざ
ったいわゆる均質流となる。このような状態で絞りに流
入すれば圧力の変動は小さくなり、時間的に変動する音
の発生が抑えられる。In particular, when a spiral flow path is used as a mechanism for stirring the refrigerant, when the refrigerant is passed through the spiral flow path, a secondary flow due to centrifugal force occurs in a plane perpendicular to the traveling direction of the refrigerant. A strong stirring action occurs. This stirring action causes mixing of the gas phase and the liquid phase, resulting in a so-called homogeneous flow in which fine bubbles are homogeneously mixed in the liquid. If it flows into the throttle in such a state, the fluctuation of the pressure becomes small, and the generation of a sound that fluctuates with time is suppressed.
【００２０】[0020]
【実施例】本発明の実施例を図をもとに説明する。Embodiments of the present invention will be described with reference to the drawings.
【００２１】図１は本発明の一実施例を示したものであ
る。本実施例は、家庭用のルームエアコンとして広く普
及しているセパレートタイプの空気調和機に本発明を適
用したものであり、本図は、冷暖房および除湿運転切り
換え可能な冷凍サイクルの構成を模式的に示したもので
ある。冷房，暖房，除湿運転時の冷媒の流れを図中に矢
印で示している。１は圧縮機，２はアキュムレータ，３
は四方弁，４は室外側熱交換器で多数枚のフィンにパイ
プを貫通したクロスフィンチューブタイプの熱交換器，
５は室外側ファンである。６は室外側の二方弁(二方弁
Ｂ)であり１２の室内側二方弁(二方弁Ａ)と協調的に動
作することにより冷暖房および除湿の各運転を切り換え
る。即ち二方弁Ａを開け二方弁Ｂを閉じると冷暖房運転
となる。冷房と暖房の切り換えは四方弁３で行なう。ま
た二方弁Ａを閉じ二方弁Ｂを開けると除湿運転となる。
本実施例では二方弁Ａとしてブリードポートと呼ばれる
小孔を内部に有する二方弁を用いている。FIG. 1 shows an embodiment of the present invention. The present embodiment is one in which the present invention is applied to a separate type air conditioner that is widely used as a room air conditioner for home use. This figure schematically shows the configuration of a refrigeration cycle capable of switching between cooling and heating and dehumidifying operation. It is shown in. The arrows in the figure show the flow of refrigerant during cooling, heating, and dehumidifying operations. 1 is a compressor, 2 is an accumulator, 3
Is a four-way valve, 4 is an outdoor heat exchanger, a cross-fin tube type heat exchanger in which a large number of fins penetrate the pipe,
Reference numeral 5 is an outdoor fan. Reference numeral 6 denotes an outdoor two-way valve (two-way valve B), which operates in cooperation with the indoor two-way valve (two-way valve A) 12 to switch between heating and cooling and dehumidifying operations. That is, when the two-way valve A is opened and the two-way valve B is closed, the cooling and heating operation is performed. The four-way valve 3 is used for switching between cooling and heating. When the two-way valve A is closed and the two-way valve B is opened, the dehumidifying operation is started.
In this embodiment, a two-way valve having a small hole called a bleed port inside is used as the two-way valve A.
【００２２】冷暖房運転時には二方弁Ｂを閉じるので冷
暖房用の絞りであるキャピラリチューブ７を冷媒が流れ
る。室内側では二方弁Ａを開ける。この時には室内側の
熱交換器１０ａ，１０ｂは共に蒸発器あるいは凝縮器と
して作用する。Since the two-way valve B is closed during the heating / cooling operation, the refrigerant flows through the capillary tube 7, which is a throttle for cooling / heating. Open the two-way valve A on the indoor side. At this time, the heat exchangers 10a and 10b on the indoor side both act as an evaporator or a condenser.
【００２３】除湿運転時には二方弁Ｂを開け二方弁Ａを
閉じる。圧縮機１から吐出された冷媒は室外側熱交換器
４で一部が凝縮し二相状態のまま２分割された室内側熱
交換器の一方１０ｂに流入する。１０ｂ内で冷媒はさら
に凝縮し、その凝縮熱によって１０ａで冷却・減湿され
た空気の再加熱を行なう。１０ｂを出た冷媒は配管１３
に流入する。二方弁Ａは閉じられているので冷媒は、二
方弁Ａ内のブリードポート１６（図２中に示す。）を通
って配管１４に流入する。この時ブリードポート１６が
絞りとなり冷媒は断熱膨張して減圧される。配管１４か
ら熱交換器１０ａに流入した低圧，低温の冷媒は、空気
調和機に吸い込まれた空気から蒸発熱によって熱を奪
い、空気は冷却・減湿される。During the dehumidifying operation, the two-way valve B is opened and the two-way valve A is closed. A part of the refrigerant discharged from the compressor 1 is condensed in the outdoor heat exchanger 4 and flows into one of the indoor heat exchangers 10b which is divided into two in a two-phase state. The refrigerant is further condensed in 10b, and the heat cooled and dehumidified in 10a is reheated by the heat of condensation. Refrigerant exiting 10b is pipe 13
Flow into. Since the two-way valve A is closed, the refrigerant flows into the pipe 14 through the bleed port 16 (shown in FIG. 2) in the two-way valve A. At this time, the bleed port 16 serves as a throttle to adiabatically expand the refrigerant and reduce the pressure. The low-pressure, low-temperature refrigerant flowing from the pipe 14 into the heat exchanger 10a takes heat from the air sucked into the air conditioner by the heat of evaporation, and the air is cooled and dehumidified.
【００２４】室内熱交換器の凝縮側１０ｂ出口と二方弁
Ａ１２との間に本発明による螺旋状流路１５が設けられ
ている。螺旋状流路１５はパイプを螺旋状に巻いたもの
であり、鉛直方向上側から見た図を図１（ｂ）に，斜視
図を図１（ｃ）に示す。本図ではコイルの巻き数は２回
であるが巻き回数は任意である。定性的には巻き回数が
多い方が騒音低減の効果が大きいが、スペース，必要と
される低減幅などの要素を考慮して回数を決定する。ま
た巻き半径（図５中に図示）は小さい方が遠心力による
撹拌効果が大きい。流体中に存在する気泡に作用する浮
力よりも、螺旋状流路内を流れる流体に作用する遠心力
が大きくなるような巻き半径を閾値とし、それよりも小
さな巻き半径とする。さらに螺旋状流路１５の螺旋状に
巻かれた内側の空間に粘弾性の高い材料、例えばパテ，
ゴム等を詰め込むと騒音低減の効果が大きい。A spiral flow passage 15 according to the present invention is provided between the outlet 10b on the condensation side of the indoor heat exchanger and the two-way valve A12. The spiral flow path 15 is formed by spirally winding a pipe. A view seen from the upper side in the vertical direction is shown in FIG. 1 (b), and a perspective view is shown in FIG. 1 (c). Although the number of turns of the coil is two in this figure, the number of turns is arbitrary. Qualitatively, the greater the number of windings, the greater the effect of noise reduction, but the number of windings is determined in consideration of factors such as space and required reduction width. Further, the smaller the winding radius (illustrated in FIG. 5), the greater the stirring effect by the centrifugal force. The winding radius that makes the centrifugal force acting on the fluid flowing in the spiral flow path larger than the buoyancy acting on the bubbles existing in the fluid is set as a threshold value, and the winding radius smaller than that. Further, a material having high viscoelasticity, such as putty, is provided in the spirally wound inner space of the spiral flow path 15.
Packing with rubber etc. has a great effect on noise reduction.
【００２５】室内側熱交換器は図１では１０ａ，１０ｂ
のように完全に分離されているが、１つの熱交換器でフ
ィンにスリットや切れ目を入れて熱的に分割されたもの
でもよい。また分割された熱交換器のうち蒸発側１０ａ
は空気の通風路に対して風上側に凝縮側１０ｂは風下側
に直列に置かれている。除湿運転時の除湿効果を考慮す
るとこのような構成がよいが、機器構成上の都合によっ
ては１０ａと１０ｂを並列に置いてもよい。The indoor heat exchangers are shown as 10a and 10b in FIG.
However, the fins may be divided into slits or cuts by one heat exchanger to be thermally divided. Also, of the divided heat exchangers, the evaporation side 10a
Is arranged in series on the windward side of the air passage and on the leeward side of the condenser side 10b. Such a configuration is preferable in consideration of the dehumidifying effect during the dehumidifying operation, but 10a and 10b may be placed in parallel depending on the convenience of the device configuration.
【００２６】また図１において除湿用の絞りは二方弁Ａ
内のブリードポートを用いたが、二方弁Ａと並列につな
がれたキャピラリチューブを用いてもよい。さらに二方
弁Ａの代わりに電動膨張弁等の流量調節弁を用いてもよ
い。In FIG. 1, the dehumidifying throttle is a two-way valve A.
Although the inner bleed port is used, a capillary tube connected in parallel with the two-way valve A may be used. Further, instead of the two-way valve A, a flow control valve such as an electric expansion valve may be used.
【００２７】図３は本発明の別の実施例を示したもので
ある。本実施例のサイクル構成は図１に示した第１の実
施例と同じであり、室内側熱交換器１０ａと１０ｂとそ
の間の配管部分のみ図３に示した。第１の実施例と同様
に二方弁Ａ１２（ブリードポート内蔵）の開閉により冷
暖房と除湿運転を切り換える。FIG. 3 shows another embodiment of the present invention. The cycle configuration of the present embodiment is the same as that of the first embodiment shown in FIG. 1, and only the indoor heat exchangers 10a and 10b and the piping portion between them are shown in FIG. Similar to the first embodiment, the heating / cooling and dehumidifying operation are switched by opening / closing the two-way valve A12 (built-in bleed port).
【００２８】本実施例の特徴は、螺旋状流路１５の巻き
方向が途中で反対になることである。こうすることによ
って螺旋状流路内を流れる冷媒に対する撹拌作用を高め
ることができる。A feature of this embodiment is that the spiral flow paths 15 are wound in opposite directions on the way. By doing so, the stirring action on the refrigerant flowing in the spiral flow path can be enhanced.
【００２９】図４は本発明のさらに別の実施例を示した
ものである。螺旋状流路１５を形成するパイプを同一平
面内で巻いたものであり、機器構成の関係で厚さ方向に
スペースが取れないような場合に有効である。またゴム
製のシート等で螺旋状流路部分をサンドイッチ状に挟む
ことにより騒音低減の効果を大きくすることができる。FIG. 4 shows another embodiment of the present invention. The pipe forming the spiral flow path 15 is wound in the same plane, which is effective when space cannot be secured in the thickness direction due to the device configuration. Further, the effect of noise reduction can be enhanced by sandwiching the spiral flow path portion in a sandwich shape with a rubber sheet or the like.
【００３０】以上の各実施例においては、螺旋状流路１
５は冷媒の流れ方向が水平面内かそれに近い角度になる
ように設置されている。設置角度は必ずしも水平に限る
必要はない。例えば冷媒の流れ方向が垂直面内になるよ
うにしてもよい。ただし螺旋状流路の巻き半径（図５中
に図示）が大きいと、重力の影響で二相流中の気相と液
相の分離が進んでしまう場合がある。巻き半径がある閾
値よりも小さければ遠心力による撹拌効果の方が重力の
影響よりも大きくなり本発明の効果が現われるので、巻
き半径はその閾値以下としなければならない。ただし遠
心力による撹拌効果と重力の影響との大小関係は同じ巻
き半径であってもそこを流れる冷媒の流量によって変わ
るので、流量変化の大きい装置に適用する場合は水平か
水平に近い角度に設置した方が安全である。In each of the above embodiments, the spiral flow path 1
5 is installed so that the flow direction of the refrigerant is in a horizontal plane or at an angle close to it. The installation angle does not necessarily have to be horizontal. For example, the flow direction of the coolant may be in a vertical plane. However, if the winding radius of the spiral flow path (shown in FIG. 5) is large, the separation of the gas phase and the liquid phase in the two-phase flow may proceed due to the influence of gravity. If the winding radius is smaller than a certain threshold value, the stirring effect due to the centrifugal force is larger than the influence of gravity and the effect of the present invention appears. Therefore, the winding radius must be below the threshold value. However, the magnitude relationship between the stirring effect due to centrifugal force and the effect of gravity changes depending on the flow rate of the refrigerant flowing through it even if the winding radius is the same, so when applying to a device with a large change in flow rate, install it at a horizontal or near-horizontal angle. It is safer to do.
【００３１】本実施例による円形流路内の冷媒の流れを
模式的に図５に示す。これは螺旋状流路部の垂直面内の
断面図である。パイプ内を冷媒（一般には流体）が流れ
ると遠心力によって巻の中心からみて外向きの力が生
じ、主流方向に対して垂直な面内に２次流れが誘起され
る。この２次流れによって流体は攪拌され、二相流は気
液が混ざり合って均質な流れとなる。均質流で絞りに流
入すると、二相が分離した状態で流入する場合に比較し
て圧力の変動が少ない。The flow of the refrigerant in the circular flow passage according to this embodiment is schematically shown in FIG. This is a cross-sectional view in the vertical plane of the spiral flow path portion. When a refrigerant (generally a fluid) flows in the pipe, a centrifugal force causes an outward force when viewed from the center of the winding, and a secondary flow is induced in a plane perpendicular to the main flow direction. The fluid is agitated by this secondary flow, and the two-phase flow mixes gas and liquid to form a homogeneous flow. When entering the throttle with a homogeneous flow, the fluctuation of the pressure is less than that when the two phases are introduced in a separated state.
【００３２】[0032]
【発明の効果】従って本発明によれば、冷凍サイクルの
冷媒の蒸発熱と凝縮熱を利用した除湿運転可能な空気調
和機において、除湿運転時に冷媒が二相状態で除湿用の
絞りに流入するために生じる圧力変動による騒音の発生
を、絞りに流入する前に攪拌して混合することによって
抑えることができる。According to the present invention, therefore, in an air conditioner capable of dehumidifying operation utilizing the heat of vaporization and the heat of condensation of the refrigerant in the refrigeration cycle, the refrigerant flows into the dehumidifying throttle in a two-phase state during dehumidifying operation. It is possible to suppress the generation of noise due to the pressure fluctuation caused by the mixing by stirring and mixing before flowing into the throttle.
【図１】本発明の１実施例を示す冷凍サイクル系統図で
ある。FIG. 1 is a refrigeration cycle system diagram showing one embodiment of the present invention.
【図２】ブリードポートを内蔵した二方弁の内部構造を
示す断面図である。FIG. 2 is a cross-sectional view showing the internal structure of a two-way valve containing a bleed port.
【図３】本発明の別の実施例を示す図である。FIG. 3 is a diagram showing another embodiment of the present invention.
【図４】本発明のさらに別の実施例を示す図である。FIG. 4 is a diagram showing yet another embodiment of the present invention.
【図５】螺旋状流路内の流れに誘起される２次流れを説
明する図である。FIG. 5 is a diagram illustrating a secondary flow induced by a flow in a spiral flow path.
【図６】冷凍サイクルを利用した除湿運転可能な空気調
和機の従来の冷凍サイクル系統図である。FIG. 6 is a conventional refrigeration cycle system diagram of an air conditioner capable of dehumidifying operation using a refrigeration cycle.
１…圧縮機、 ２…アキュムレータ、 ３…四方弁、 ４…室外側熱交換器、 ５…室外側ファン、 ６…二方弁Ｂ、 ７…冷暖房用キャピラリチューブ、 ８…サービスバルブ、 ９…サービスバルブ、 １０ａ…室内側熱交換器、 １０ｂ…室内側熱交換器、 １１…室内側ファン、 １２…二方弁Ａ、 １３…配管、 １４…配管、 １５…螺旋状流路、 １６…ブリードポート、 １７…除湿用キャピラリチューブ、 １８…分岐用継手、 １９…分岐用継手、 ２０…二方弁本体、 ２１…第１流体口、 ２２…第２流体口、 ２３…弁室、 ２４…弁座、 ２５…弁体、 ２６…横孔、 ２７…弁ばね、 ２８…吸引子、 ２９…電磁コイル。 1 ... Compressor, 2 ... Accumulator, 3 ... four-way valve, 4 ... Outdoor heat exchanger, 5 ... Outdoor fan, 6 ... Two-way valve B, 7 ... Capillary tube for air conditioning 8 ... Service valve, 9 ... Service valve, 10a ... Indoor heat exchanger, 10b ... Indoor heat exchanger, 11 ... Indoor fan, 12 ... Two-way valve A, 13 ... Piping, 14 ... Piping, 15 ... spiral flow path, 16 ... Bleed port, 17 ... Capillary tube for dehumidification, 18 ... Branch joint, 19 ... Branch joint, 20 ... Two-way valve body, 21 ... First fluid port, 22 ... Second fluid port, 23 ... valve chamber, 24 ... valve seat, 25 ... Valve, 26 ... Horizontal hole, 27 ... Valve spring, 28 ... sucker, 29 ... Electromagnetic coil.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 横山 英範 栃木県下都賀郡大平町大字富田800番地 株式会社日立製作所リビング機器事業部 内 (56)参考文献 特開 平２−183777（ＪＰ，Ａ) 特開 平５−18630（ＪＰ，Ａ) 実開 昭54−141547（ＪＰ，Ｕ) 実開 平３−42976（ＪＰ，Ｕ) 実開 平１−98381（ＪＰ，Ｕ) 実開 昭61−61385（ＪＰ，Ｕ) 実開 昭54−159348（ＪＰ，Ｕ) 実開 昭55−32905（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) F25B 41/00 F25B 13/00 F25B 29/00 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hidenori Yokoyama 800 Tomita, Odaira-cho, Shimotsuga-gun, Tochigi Prefecture Living Equipment Division, Hitachi, Ltd. (56) Reference JP-A-2-183777 (JP, A) Kaihei 5-18630 (JP, A) Actually open 54-141547 (JP, U) Actually open 3-422976 (JP, U) Actually open 1-98381 (JP, U) Actually open 61-61385 ( JP, U) Actual development Sho 54-159348 (JP, U) Actual development Sho 55-32905 (JP, U) (58) Fields investigated (Int.Cl. 7 , DB name) F25B 41/00 F25B 13/00 F25B 29/00
Claims (4)
換器と、室内側に配置された、除湿運転時に絞りとして
作用する室内側絞り装置、及びこの絞り装置を介して接
続され除湿運転時に凝縮側熱交換器として作用する室内
凝縮側熱交換器と蒸発側熱交換器として作用する室内蒸
発側熱交換器とを備えた空気調和機において、前記室内
凝縮側熱交換器と前記室内側絞り装置との間に、除湿運
転時に前記室外側熱交換器及び前記室内凝縮側熱交換器
とで熱交換された冷媒を撹拌し、前記室内側絞り装置を
冷媒が通過する際の冷媒流動音を低減する機構を備えた
空気調和機。1. A compressor and an outdoor heat exchanger arranged on the outdoor side, and a throttle arranged on the indoor side during dehumidifying operation.
Indoor side expansion device that operates and a room that is connected through this expansion device and that acts as a condensation side heat exchanger during dehumidification operation
Indoor steaming acting as condensation side heat exchanger and evaporation side heat exchanger
In an air conditioner provided with a heat exchanger on the side of emission , a dehumidification operation is performed between the heat exchanger on the side of condensation inside the room and the expansion device on the side of indoor.
The outdoor heat exchanger and the indoor condensing side heat exchanger during transfer
Heat exchange refrigerant and stirred at a, the indoor-side throttle device
An air conditioner equipped with a mechanism that reduces the refrigerant flow noise when the refrigerant passes through .
小孔を有する二方弁であり、除湿運転時に、この小孔を
絞りとして用いる空気調和機。2. The air conditioner according to claim 1, wherein the expansion device is a two-way valve having a small hole therein, and the small hole is used as a restriction during dehumidification operation.
ら全開まで連続的あるいは段階的に調節可能な流量調節
弁である空気調和機。3. The air conditioner according to claim 1, wherein the expansion device is a flow control valve that can be continuously or stepwise adjusted from fully closed to fully open.
構は、螺旋状流路である空気調和機。4. The air conditioner according to claim 1, wherein the mechanism for stirring the refrigerant is a spiral flow path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21548893A JP3435743B2 (en) | 1993-08-31 | 1993-08-31 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21548893A JP3435743B2 (en) | 1993-08-31 | 1993-08-31 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0763442A JPH0763442A (en) | 1995-03-10 |
| JP3435743B2 true JP3435743B2 (en) | 2003-08-11 |
Family
ID=16673220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21548893A Expired - Fee Related JP3435743B2 (en) | 1993-08-31 | 1993-08-31 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3435743B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001208371A (en) * | 2000-01-26 | 2001-08-03 | Matsushita Electric Ind Co Ltd | Heat exchanger unit of air conditioner |
| JP4904970B2 (en) * | 2006-08-01 | 2012-03-28 | ダイキン工業株式会社 | Refrigeration equipment |
-
1993
- 1993-08-31 JP JP21548893A patent/JP3435743B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0763442A (en) | 1995-03-10 |
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