JP2002081770A - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JP2002081770A JP2002081770A JP2000274706A JP2000274706A JP2002081770A JP 2002081770 A JP2002081770 A JP 2002081770A JP 2000274706 A JP2000274706 A JP 2000274706A JP 2000274706 A JP2000274706 A JP 2000274706A JP 2002081770 A JP2002081770 A JP 2002081770A
- Authority
- JP
- Japan
- Prior art keywords
- compressor
- air conditioner
- bypass
- refrigerant
- way switching
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、圧縮機の信頼性
を向上させることが可能な空気調和機に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner capable of improving the reliability of a compressor.
【０００２】[0002]
【従来の技術】従来から使用されている空気調和機で
は、圧縮機、室外熱交換器、減圧機構、室内熱交換器を
その冷媒回路中に備え、圧縮機を駆動することによって
上記冷媒回路中に冷媒を循環させるように構成されてい
る。そして四路切換弁で冷媒の流通方向を切替えること
により、冷房運転時は室外熱交換器を凝縮器として機能
させると共に、室内熱交換器を蒸発器として機能させ、
暖房運転時は室外熱交換器を蒸発器として機能させると
共に、室内熱交換器を凝縮器として機能させるようにし
ている。2. Description of the Related Art A conventional air conditioner includes a compressor, an outdoor heat exchanger, a decompression mechanism, and an indoor heat exchanger in a refrigerant circuit thereof. It is configured to circulate a refrigerant. And, by switching the flow direction of the refrigerant with the four-way switching valve, during the cooling operation, the outdoor heat exchanger functions as a condenser, and the indoor heat exchanger functions as an evaporator,
During the heating operation, the outdoor heat exchanger functions as an evaporator, and the indoor heat exchanger functions as a condenser.
【０００３】[0003]
【発明が解決しようとする課題】ところで、上記冷媒回
路中を流れる冷媒には、圧縮機の潤滑性を向上するため
に冷凍機油が入っている。しかし、冬季において圧縮機
が停止している時間が長く、圧縮機内部の温度が極めて
低下している状態では、冷媒が冷凍機油に溶解する割合
が増加するため、冷凍機油の粘度が低下してしまう。こ
のような状態で運転を開始すると、例え立上り時の運転
制御を行ったとしても、圧縮機の潤滑性が低下して摺動
部の摩擦や摩耗を促進させる原因となるため、圧縮機の
故障に繋がるという問題が生じている。The refrigerant flowing in the refrigerant circuit contains refrigeration oil in order to improve the lubricity of the compressor. However, in a state where the compressor is stopped for a long time in winter and the temperature inside the compressor is extremely low, the ratio of the refrigerant dissolved in the refrigerating machine oil increases, so that the viscosity of the refrigerating machine oil decreases. I will. If the operation is started in such a state, even if the operation control at the time of start-up is performed, the lubricity of the compressor is reduced and the friction and wear of the sliding portion are promoted. The problem that it leads to has arisen.
【０００４】そこで、上記問題を解決する方法として冷
媒量を減らすという方法があるが、これはＣＯＰの向上
を目指して熱交換器の容積を拡大し、冷媒量を増加する
ように構成したことと相反することになる。またこの
他、別途にヒータを設けることによって、予め圧縮機を
温めておくように制御する方法もあるが、この場合、常
に圧縮機を温めておく必要があるため、コストがかか
り、エネルギーの無駄であるという問題がある。In order to solve the above problem, there is a method of reducing the amount of the refrigerant. However, this method is intended to increase the volume of the heat exchanger and increase the amount of the refrigerant in order to improve the COP. Would be in conflict. In addition, there is a method in which a separate heater is provided to control the compressor so that the compressor is preliminarily heated. However, in this case, since the compressor must be constantly warmed, costs are increased and energy is wasted. There is a problem that is.
【０００５】この発明は上記従来の欠点を解決するため
になされたものであり、その目的は、圧縮機の通常の運
転立上り時における冷凍機油の粘度の低下を抑制し、圧
縮機の信頼性を確保することが可能な空気調和機を提供
することにある。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional drawbacks, and has as its object to suppress a decrease in the viscosity of refrigeration oil at the time of normal startup of the compressor, thereby improving the reliability of the compressor. It is to provide an air conditioner that can be secured.
【０００６】[0006]
【課題を解決するための手段】そこで請求項１の空気調
和機は、圧縮機２を有する空気調和機において、上記圧
縮機２の吐出側２ａを吸込側２ｂへとバイパスさせるバ
イパス手段を設け、上記圧縮機２の運転開始直後から一
定時間は、圧縮機２の吐出冷媒を、上記バイパス手段を
介して圧縮機２の吸込側２ｂにバイパスさせるように構
成したことを特徴としている。Therefore, an air conditioner according to a first aspect of the present invention is an air conditioner having a compressor 2, wherein bypass means for bypassing the discharge side 2a of the compressor 2 to the suction side 2b is provided. It is characterized in that the refrigerant discharged from the compressor 2 is bypassed to the suction side 2b of the compressor 2 via the bypass means for a certain time immediately after the start of the operation of the compressor 2.
【０００７】上記請求項１の空気調和機では、圧縮機２
の運転開始直後から一定時間は、圧縮機２の吐出側２ａ
から流出する冷媒を、バイパス手段を介して圧縮機２の
吸込側２ｂへとバイパスさせるように構成している。こ
の結果、圧縮機２に大きな負荷をかけずに冷凍機油の温
度を上昇することができるため、その後の圧縮機２の通
常の運転立上り時における冷凍機油の粘度の低下を抑制
し、圧縮機２の信頼性を確保することが可能となる。In the air conditioner of the first aspect, the compressor 2
For a certain period immediately after the start of the operation of the compressor 2, the discharge side 2a of the compressor 2 is
The refrigerant flowing out of the compressor 2 is configured to be bypassed to the suction side 2b of the compressor 2 via bypass means. As a result, since the temperature of the refrigerating machine oil can be increased without applying a large load to the compressor 2, a decrease in the viscosity of the refrigerating machine oil at the time of a normal start-up of the compressor 2 is suppressed, and the compressor 2 Reliability can be ensured.
【０００８】また請求項２の空気調和機は、上記バイパ
ス手段は、冷媒回路に介設した四路切換弁６の１次ポー
ト同士を連通させることにより構成していることを特徴
としている。The air conditioner according to claim 2 is characterized in that the bypass means is constituted by connecting the primary ports of the four-way switching valve 6 provided in the refrigerant circuit.
【０００９】上記請求項２の空気調和機では、上記バイ
パス手段として、四路切換弁６の１次ポート同士を連通
させている。このように空気調和機の冷媒回路に必要不
可欠な四路切換弁６に、上記圧縮機２の吐出側２ａと吸
込側２ｂとを連通させる機能を併せ持たせたことによっ
て、低コストかつ容易な方法で、圧縮機２の通常の運転
立上り時における冷凍機油の粘度の低下を抑制し、圧縮
機２の信頼性を確保することが可能となる。In the air conditioner of the second aspect, the primary ports of the four-way switching valve 6 communicate with each other as the bypass means. As described above, the four-way switching valve 6, which is indispensable for the refrigerant circuit of the air conditioner, is provided with a function of communicating the discharge side 2a and the suction side 2b of the compressor 2 with each other. With this method, it is possible to suppress a decrease in the viscosity of the refrigerating machine oil at the time of normal startup of the compressor 2, and to ensure the reliability of the compressor 2.
【００１０】[0010]
【発明の実施の形態】次に、この発明の空気調和機の具
体的な実施の形態について、図面を参照しつつ詳細に説
明する。図１は、本発明の一実施の形態である空気調和
機１の構成を示す冷媒回路図である。Next, specific embodiments of the air conditioner of the present invention will be described in detail with reference to the drawings. FIG. 1 is a refrigerant circuit diagram illustrating a configuration of an air conditioner 1 according to an embodiment of the present invention.
【００１１】図１に示すように、上記空気調和機１は、
圧縮機２、室外熱交換器３、電動膨張弁４（減圧機
構）、室内熱交換器５を備えるヒートポンプ式の空気調
和機であり、圧縮機２からの冷媒が循環されるように冷
媒回路が構成されている。すなわち、圧縮機２の吐出側
２ａと吸込側２ｂとは、それぞれ四路切換弁６の１次ポ
ートに接続されている。そして、四路切換弁６の２次ポ
ートの一方から室外ファン８を付設している室外熱交換
器３、電動膨張弁４、室内ファン９を付設している室内
熱交換器５をそれぞれ経由して四路切換弁６の他方の２
次ポートへ至る冷媒回路が冷媒配管によって構成されて
いる。As shown in FIG. 1, the air conditioner 1 comprises:
It is a heat pump type air conditioner including a compressor 2, an outdoor heat exchanger 3, an electric expansion valve 4 (decompression mechanism), and an indoor heat exchanger 5, and a refrigerant circuit is provided so that refrigerant from the compressor 2 is circulated. It is configured. That is, the discharge side 2a and the suction side 2b of the compressor 2 are connected to the primary ports of the four-way switching valve 6, respectively. Then, one of the secondary ports of the four-way switching valve 6 passes through the outdoor heat exchanger 3 provided with the outdoor fan 8, the electric expansion valve 4, and the indoor heat exchanger 5 provided with the indoor fan 9, respectively. Of the four-way switching valve 6
The refrigerant circuit leading to the next port is constituted by a refrigerant pipe.
【００１２】上記空気調和機１の冷媒回路において冷暖
房運転を行う際には、上記電動膨張弁４を所定の開度に
調整すると共に、室外ファン８及び室内ファン９を所定
の回転数で駆動する。そして四路切換弁６で冷媒の流通
方向を切替えることにより、上記冷房運転を行う場合
は、圧縮機２からの吐出冷媒を二重線矢印に示すように
循環させ、室外熱交換器３を凝縮器として機能させると
共に、室内熱交換器５を蒸発器として機能させることに
よって室内空気の冷却を行う。また、暖房運転を行う場
合は、圧縮機２からの吐出冷媒を破線矢印に示すように
循環させ、室内熱交換器５を凝縮器として機能させると
共に、室外熱交換器３を蒸発器として機能させることに
よって、室内空気の加熱を行うように構成している。When performing the cooling / heating operation in the refrigerant circuit of the air conditioner 1, the electric expansion valve 4 is adjusted to a predetermined opening degree, and the outdoor fan 8 and the indoor fan 9 are driven at a predetermined rotation speed. . When the above-mentioned cooling operation is performed by switching the flow direction of the refrigerant by the four-way switching valve 6, the refrigerant discharged from the compressor 2 is circulated as indicated by a double-line arrow, and the outdoor heat exchanger 3 is condensed. The indoor air is cooled by causing the indoor heat exchanger 5 to function as an evaporator while functioning as a heat exchanger. In the case of performing the heating operation, the refrigerant discharged from the compressor 2 is circulated as indicated by a dashed arrow, and the indoor heat exchanger 5 functions as a condenser and the outdoor heat exchanger 3 functions as an evaporator. Thereby, it is configured to heat the indoor air.
【００１３】図２に上記冷暖房運転時における四路切換
弁６の切替位置を示した概略断面図を示す。ここで
（ａ）は冷房運転時における切替位置を、（ｂ）は暖房
運転時における切替位置を示している。図２に示すよう
に、上記四路切換弁６は、略円筒状の本体ケーシング１
０の内部に、主軸１８方向への上下移動及び主軸１８を
中心とした回動を可能に構成した円盤状の弁体１１と、
上記弁体１１と対向する下方位置に配置された円盤状の
弁座１９とを備えて成り、さらに上記弁座１９には各冷
媒配管を接続するための４本の継手１４、１５、１６、
１７が取付けられている。具体的には、上記圧縮機２の
吐出側２ａと吸込側２ｂへと通じる冷媒配管が、上記四
路切換弁６の１次ポートである吐出側継手１４と吸込側
継手１７とにそれぞれ接続される一方、上記室外熱交換
器３と室内熱交換器５へと通じる冷媒配管が、四路切換
弁６の２次ポートである室外側継手１５と室内側継手１
６とにそれぞれ接続されている。また、上記弁体１１に
は略楕円状に穿設された第１通気孔１２と、上記第１通
気孔１２よりも長い楕円を円弧状に折曲げたような形に
穿設された第２通気孔１３とが設けられており、このそ
れぞれの通気孔１２、１３の範囲内に配置された継手同
士が連通されるように構成されている。FIG. 2 is a schematic sectional view showing the switching position of the four-way switching valve 6 during the cooling / heating operation. Here, (a) shows the switching position during the cooling operation, and (b) shows the switching position during the heating operation. As shown in FIG. 2, the four-way switching valve 6 includes a substantially cylindrical main body casing 1.
0, a disc-shaped valve body 11 configured to be able to move up and down in the direction of the main shaft 18 and rotate around the main shaft 18,
A disc-shaped valve seat 19 disposed at a lower position facing the valve body 11; and four joints 14, 15, 16, for connecting each refrigerant pipe to the valve seat 19,
17 are attached. Specifically, a refrigerant pipe communicating with the discharge side 2a and the suction side 2b of the compressor 2 is connected to a discharge side joint 14 and a suction side joint 17 which are primary ports of the four-way switching valve 6, respectively. On the other hand, a refrigerant pipe communicating with the outdoor heat exchanger 3 and the indoor heat exchanger 5 includes an outdoor-side joint 15 and a indoor-side joint 1 which are secondary ports of the four-way switching valve 6.
6 respectively. The valve body 11 has a first air hole 12 formed substantially in an elliptical shape, and a second air hole formed by bending an ellipse longer than the first air hole 12 into an arc shape. A vent 13 is provided, and the joints arranged in the range of the vents 12 and 13 are configured to communicate with each other.
【００１４】上記四路切換弁６の冷暖房運転時における
切替動作について説明する。まず冷房運転時には、上記
弁体１１を上方へ持ち上げて弁座１９から離反させ、図
２（ａ）に示すような位置に弁体１１を回転させる。つ
まり、上記第１通気孔１２内に室内側継手１６と吸込側
継手１７の開口部が、また第２通気孔１３内に吐出側継
手１４と室外側継手１５の開口部がくるように弁体１１
を回転させ、この状態で上記弁体１１を弁座１９上に下
ろすことによって、室内側継手１６と吸込側継手１７と
を連通させると共に、吐出側継手１４と室外側継手１５
とを連通させるように構成している。次に、暖房運転に
切替える場合は、上記弁体１１を上方に持ち上げて弁座
１９から離反させ、図２（ｂ）に示すように、上記第１
通気孔１２内に室外側継手１５と吸込側継手１７の開口
部が、また第２通気孔１３内に吐出側継手１４と室内側
継手１６の開口部がくるように弁体１１を回転させ、こ
の状態で弁体１１を弁座１９上に下ろすことによって、
上記室外側継手１５と吸込側継手１７とを連通させると
共に、上記吐出側継手１４と室内側継手１６とを連通さ
せるように構成している。The switching operation of the four-way switching valve 6 during the cooling / heating operation will be described. First, during the cooling operation, the valve body 11 is lifted upward to be separated from the valve seat 19, and the valve body 11 is rotated to a position as shown in FIG. That is, the valve body is arranged such that the openings of the indoor joint 16 and the suction joint 17 are located in the first vent hole 12, and the openings of the discharge joint 14 and the outdoor joint 15 are located in the second vent hole 13. 11
By rotating the valve body 11 and lowering the valve body 11 on the valve seat 19 in this state, the indoor joint 16 and the suction joint 17 are communicated, and the discharge joint 14 and the outdoor joint 15 are connected.
And are communicated. Next, when switching to the heating operation, the valve body 11 is lifted upward and separated from the valve seat 19, and as shown in FIG.
The valve body 11 is rotated such that the opening of the outdoor joint 15 and the suction-side joint 17 is located in the ventilation hole 12 and the opening of the discharge-side joint 14 and the indoor joint 16 is located in the second ventilation hole 13. By lowering the valve body 11 on the valve seat 19 in this state,
The outdoor side joint 15 and the suction side joint 17 are connected to each other, and the discharge side joint 14 and the room side joint 16 are connected to each other.
【００１５】次に本発明の要旨部分である圧縮機２のバ
イパス運転について説明する。すなわち上記バイパス運
転とは、図１の実線矢印に示すように、圧縮機２の吐出
側２ａから流出した冷媒を、バイパス手段である四路切
換弁６を介してそのまま圧縮機２の吸込側２ｂに返流す
るように構成した運転をいい、圧縮機２の運転開始直後
から一定時間は、上記バイパス運転が行われるように制
御されている。そして上記一定時間が経過すれば、バイ
パス運転は終了され、通常の冷暖房運転の運転開始時の
初期制御が行われるようになっている。Next, the bypass operation of the compressor 2, which is a gist of the present invention, will be described. That is, the bypass operation means that the refrigerant flowing out of the discharge side 2a of the compressor 2 is directly passed through the four-way switching valve 6 as the bypass means as shown by a solid line arrow in FIG. The bypass operation is controlled such that the bypass operation is performed for a fixed time immediately after the operation of the compressor 2 is started. Then, when the predetermined time has elapsed, the bypass operation is terminated, and the initial control at the start of the normal cooling / heating operation is performed.
【００１６】上記バイパス運転時における四路切換弁６
の切替動作を図２に基づいて説明する。すなわち、図２
における弁体１１を上方へ持ち上げて、上記弁座１９か
ら離反させた状態のままで保持する。すると、全ての継
手１４、１５、１６、１７が繋がった状態（中立状態）
となるので、この状態で圧縮機２を駆動すれば、圧縮機
２の吐出側２ａから流出した冷媒を、四路切換弁６の吐
出側継手１４から吸込側継手１７へと流通させた後、再
び圧縮機２の吸込側２ｂへと返流させることが可能とな
る（バイパス運転）。すなわち、このような中立状態を
保つことによって、四路切換弁６の１次ポート同士を連
通させることができる。なお、上記バイパス運転を停止
して冷暖房運転に切替える場合は、上記したように弁体
１１を図２（ａ）又は（ｂ）の位置まで回転させ、この
状態で弁体１１を弁座１９上に下ろせば、通常の冷暖房
運転を行うことができる。The four-way switching valve 6 during the above bypass operation
Will be described with reference to FIG. That is, FIG.
The valve body 11 is lifted upward and held in a state of being separated from the valve seat 19. Then, all the joints 14, 15, 16, 17 are connected (neutral state).
Therefore, if the compressor 2 is driven in this state, the refrigerant flowing out from the discharge side 2a of the compressor 2 flows from the discharge side joint 14 of the four-way switching valve 6 to the suction side joint 17, It is possible to return to the suction side 2b of the compressor 2 again (bypass operation). That is, by maintaining such a neutral state, the primary ports of the four-way switching valve 6 can communicate with each other. When the bypass operation is stopped to switch to the cooling / heating operation, the valve body 11 is rotated to the position shown in FIG. 2A or 2B as described above, and the valve body 11 is placed on the valve seat 19 in this state. , Normal cooling and heating operation can be performed.
【００１７】図３に、上記四路切換弁６によるバイパス
運転を行った後に通常の冷暖房運転の初期運転制御を開
始した場合と、従来のように直ちに冷暖房運転の初期運
転制御を開始した場合における圧縮機２の回転数、冷凍
機油の温度、及び粘度の時間変化を示したグラフを示
す。図３のグラフにおいて、四角印は圧縮機２の回転数
を示しており、三角印と丸印はそれぞれバイパス運転を
行った場合の冷凍機油の温度と粘度とを示している（実
施例）。一方、グラフにおける点線と一点破線は、バイ
パス運転を行わずに直ちに冷暖房運転の初期運転制御を
開始した場合の冷凍機油の温度と粘度とを示している
（従来例）。グラフより、バイパス運転を行った後に冷
暖房運転の初期運転制御を開始する場合の方が、直ちに
冷暖房運転の初期運転制御を開始する場合よりも、冷凍
機油の温度が上昇していることがわかる。またこの温度
上昇に伴って、冷凍機油の粘度も上昇していることが明
らかである。これは、上記バイパス運転を行うことによ
って圧縮機２の温度が上昇するため、これによって冷媒
中に溶け込んでいた冷凍機油が再び放出されて、上記粘
度の上昇を図ることができたものと考えられる。従っ
て、上記四路切換弁６を中立状態にして、圧縮機２のバ
イパス運転を行うことにより、初期運転制御開始時にお
ける冷凍機油の粘度低下を抑制することができることが
明らかとなった。FIG. 3 shows a case where the initial operation control of the normal cooling / heating operation is started after the bypass operation by the four-way switching valve 6 is performed, and a case where the initial operation control of the cooling / heating operation is immediately started as in the related art. 4 is a graph showing changes over time of the rotation speed of the compressor 2, the temperature of the refrigerating machine oil, and the viscosity. In the graph of FIG. 3, square marks indicate the rotation speed of the compressor 2, and triangle marks and circles indicate the temperature and viscosity of the refrigerating machine oil when the bypass operation is performed, respectively (Example). On the other hand, the dotted line and the dashed line in the graph indicate the temperature and viscosity of the refrigerating machine oil when the initial operation control of the cooling / heating operation is immediately started without performing the bypass operation (conventional example). The graph shows that the temperature of the refrigerating machine oil is higher when the initial operation control of the cooling and heating operation is started after the bypass operation is performed than when the initial operation control of the cooling and heating operation is immediately started. It is also apparent that the viscosity of the refrigerating machine oil has increased with the increase in the temperature. This is considered to be because the temperature of the compressor 2 was increased by performing the bypass operation, whereby the refrigerating machine oil dissolved in the refrigerant was released again, and the viscosity could be increased. . Therefore, it was clarified that the viscosity of the refrigerating machine oil at the start of the initial operation control can be suppressed by performing the bypass operation of the compressor 2 with the four-way switching valve 6 in the neutral state.
【００１８】以上のように上記空気調和機１の実施形態
によれば、圧縮機２の運転開始直後から一定時間は、圧
縮機２の吐出側２ａから流出される冷媒を、バイパス手
段である四路切換弁６を介して圧縮機２の吸込側２ｂへ
とバイパスさせるように構成したことによって、圧縮機
２に大きな負荷をかけずに冷凍機油の温度を上昇するこ
とができる。この結果、圧縮機２の通常の運転立上り時
における冷凍機油の粘度の低下を抑制し、圧縮機２の潤
滑性の向上を図ることができるため、圧縮機２の信頼性
を確保することが可能となる。また、上記空気調和機１
の冷媒回路に必要不可欠な四路切換弁６に、上記圧縮機
２の吐出側２ａと吸込側２ｂとを連通させるバイパス機
能を併せ持たせたことによって、低コストかつ容易な方
法で上記圧縮機２の信頼性を確保することが可能とな
る。As described above, according to the embodiment of the air conditioner 1, the refrigerant flowing out from the discharge side 2a of the compressor 2 is supplied to the bypass means 4 for a certain time immediately after the start of the operation of the compressor 2. With the configuration in which the refrigerant is bypassed to the suction side 2b of the compressor 2 via the path switching valve 6, the temperature of the refrigerating machine oil can be increased without applying a large load to the compressor 2. As a result, a decrease in the viscosity of the refrigerating machine oil during normal startup of the compressor 2 can be suppressed, and the lubricity of the compressor 2 can be improved, so that the reliability of the compressor 2 can be ensured. Becomes The air conditioner 1
The four-way switching valve 6, which is indispensable to the refrigerant circuit, has a bypass function for communicating the discharge side 2a and the suction side 2b of the compressor 2 with each other. 2 can be ensured.
【００１９】以上にこの発明の具体的な実施の形態につ
いて説明したが、この発明は上記形態に限定されるもの
ではなく、この発明の範囲内で種々変更して実施するこ
とができる。すなわち本実施の形態では、四路切換弁６
に上記バイパス機能を併せ持たせたが、これとは別に圧
縮機２の吐出側２ａと吸込側２ｂとを連通させるための
バイパス通路を冷媒回路内に設けることによって、バイ
パス運転を行うことも可能である。Although the specific embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and can be implemented with various modifications within the scope of the present invention. That is, in the present embodiment, the four-way switching valve 6
In addition to the above, the bypass function is additionally provided. However, by providing a bypass passage in the refrigerant circuit for communicating the discharge side 2a and the suction side 2b of the compressor 2 separately, the bypass operation can be performed. It is.
【００２０】[0020]
【発明の効果】以上のように請求項１の空気調和機によ
れば、圧縮機に大きな負荷をかけずに冷凍機油の温度を
上昇することができるため、その後の圧縮機の通常の運
転立上り時における冷凍機油の粘度の低下を抑制し、圧
縮機の信頼性を確保することが可能となる。As described above, according to the air conditioner of the first aspect, since the temperature of the refrigerating machine oil can be raised without applying a large load to the compressor, the normal operation start-up of the compressor is thereafter performed. It is possible to suppress a decrease in the viscosity of the refrigerating machine oil at the time, and to ensure the reliability of the compressor.
【００２１】また請求項２の空気調和機によれば、空気
調和機の冷媒回路に必要不可欠な四路切換弁に、バイパ
ス機能を併せ持たせたことによって、低コストかつ容易
な方法で、圧縮機の通常の運転立上り時における冷凍機
油の粘度の低下を抑制し、圧縮機の信頼性を確保するこ
とが可能となる。According to the air conditioner of the second aspect, the four-way switching valve, which is indispensable for the refrigerant circuit of the air conditioner, is provided with the bypass function, so that the compression can be performed in a low cost and easy manner. It is possible to suppress a decrease in the viscosity of the refrigerating machine oil at the time of normal operation start-up of the compressor, and to ensure the reliability of the compressor.
【図１】本発明の第１実施形態である空気調和機の構成
を示す冷媒回路図である。FIG. 1 is a refrigerant circuit diagram illustrating a configuration of an air conditioner according to a first embodiment of the present invention.
【図２】上記空気調和機の四路切換弁の切替位置を説明
するための概略断面図である。FIG. 2 is a schematic sectional view for explaining a switching position of a four-way switching valve of the air conditioner.
【図３】上記第１実施形態である空気調和機における圧
縮機回転数と冷凍機油の温度及び粘度との時間経過を示
すグラフである。FIG. 3 is a graph showing a time course of a compressor rotation speed and a temperature and a viscosity of a refrigerating machine oil in the air conditioner according to the first embodiment.
１ 空気調和機 ２ 圧縮機 ２ａ 吐出側 ２ｂ 吸込側 ３ 室外熱交換器 ４ 電動膨張弁 ５ 室内熱交換器 ６ 四路切換弁 １１ 弁体 １２ 第１通気孔 １３ 第２通気孔 １４ 吐出側継手 １５ 室外側継手 １６ 室内側継手 １７ 吸込側継手 １９ 弁座 Reference Signs List 1 air conditioner 2 compressor 2a discharge side 2b suction side 3 outdoor heat exchanger 4 electric expansion valve 5 indoor heat exchanger 6 four-way switching valve 11 valve body 12 first ventilation hole 13 second ventilation hole 14 discharge side joint 15 Outdoor side joint 16 Indoor side joint 17 Suction side joint 19 Valve seat
Claims (2)
て、上記圧縮機（２）の吐出側（２ａ）を吸込側（２
ｂ）へとバイパスさせるバイパス手段を設け、上記圧縮
機（２）の運転開始直後から一定時間は、圧縮機（２）
の吐出冷媒を、上記バイパス手段を介して圧縮機（２）
の吸込側（２ｂ）にバイパスさせるように構成したこと
を特徴とする空気調和機。In an air conditioner having a compressor (2), a discharge side (2a) of the compressor (2) is connected to a suction side (2).
b) a bypass means for bypassing to the compressor (2) is provided for a certain period of time immediately after the start of the operation of the compressor (2).
Refrigerant discharged from the compressor (2) through the bypass means.
An air conditioner characterized by being configured to bypass to a suction side (2b) of the air conditioner.
た四路切換弁（６）の１次ポート同士を連通させること
により構成していることを特徴とする請求項１の空気調
和機。2. The air conditioner according to claim 1, wherein the bypass means is configured by connecting primary ports of a four-way switching valve (6) provided in the refrigerant circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000274706A JP3614097B2 (en) | 2000-09-11 | 2000-09-11 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000274706A JP3614097B2 (en) | 2000-09-11 | 2000-09-11 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002081770A true JP2002081770A (en) | 2002-03-22 |
| JP3614097B2 JP3614097B2 (en) | 2005-01-26 |
Family
ID=18760428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000274706A Expired - Fee Related JP3614097B2 (en) | 2000-09-11 | 2000-09-11 | Air conditioner |
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| Country | Link |
|---|---|
| JP (1) | JP3614097B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004106820A1 (en) * | 2003-05-28 | 2004-12-09 | Matsushita Electric Industrial Co., Ltd. | Method of controlling compressor and controller |
| JP2015114026A (en) * | 2013-12-10 | 2015-06-22 | 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． | Air conditioner |
-
2000
- 2000-09-11 JP JP2000274706A patent/JP3614097B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004106820A1 (en) * | 2003-05-28 | 2004-12-09 | Matsushita Electric Industrial Co., Ltd. | Method of controlling compressor and controller |
| US7451609B2 (en) | 2003-05-28 | 2008-11-18 | Panasonic Corporation | Method of controlling compressor and controller |
| CN100513942C (en) * | 2003-05-28 | 2009-07-15 | 松下电器产业株式会社 | Method of controlling compressor and controller |
| JP2015114026A (en) * | 2013-12-10 | 2015-06-22 | 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． | Air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3614097B2 (en) | 2005-01-26 |
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