JPS62210283A - Valve device for compressor - Google Patents
Valve device for compressorInfo
- Publication number
- JPS62210283A JPS62210283A JP5402986A JP5402986A JPS62210283A JP S62210283 A JPS62210283 A JP S62210283A JP 5402986 A JP5402986 A JP 5402986A JP 5402986 A JP5402986 A JP 5402986A JP S62210283 A JPS62210283 A JP S62210283A
- Authority
- JP
- Japan
- Prior art keywords
- compressor
- discharge valve
- valve
- end plate
- expansion
- 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.)
- Pending
Links
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 abstract description 12
- 230000006835 compression Effects 0.000 abstract description 10
- 238000007906 compression Methods 0.000 abstract description 10
- 238000005192 partition Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
- F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
- F04C29/126—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type
- F04C29/128—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type of the elastic type, e.g. reed valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/008—Hermetic pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2251/00—Material properties
- F05C2251/08—Shape memory
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
- Check Valves (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、冷凍装置、空気調和装置に使用される圧縮機
の弁装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a valve device for a compressor used in a refrigeration system or an air conditioner.
従来の技術
一般に圧縮機は第２図に示すように、密閉容器１内の上
部に電動機部２が配設され、その下部に圧縮部３が固定
されている。前記圧縮部３は、電動機部２の回転子４に
固定されたクランク軸５と、前記クランク軸５によって
駆動されるローラ６と円筒状の気筒であるシリンダ７お
よび、前記シリンダ７０両端面を保持する上部端板８と
下部端板９により構成されている。また上部端板８には
弁装置１０が具備されている。2. Description of the Related Art In general, a compressor has an electric motor section 2 disposed in the upper part of a closed container 1, and a compression part 3 fixed to the lower part thereof, as shown in FIG. The compression section 3 holds a crankshaft 5 fixed to the rotor 4 of the electric motor section 2, a roller 6 driven by the crankshaft 5, a cylinder 7 that is a cylindrical cylinder, and both end surfaces of the cylinder 70. It is composed of an upper end plate 8 and a lower end plate 9. The upper end plate 8 is also provided with a valve device 10 .
従来の弁装置１０は第３図〜第５図に示すように上部端
板８にシリンダ７と連通した弁口８ａが形成されている
。また弁装置１０の底部８Ｃには、弁口８ａを開閉自在
に閉じる吐出弁１３が前記弁口８ａに沿って位置し、前
記吐出弁の１３の開弁高さを制限する弁押え１１が前記
吐出弁１３上に取付けられ、固定子により上部端板８と
固定されている。As shown in FIGS. 3 to 5, the conventional valve device 10 has a valve port 8a formed in the upper end plate 8 and communicating with the cylinder 7. Further, in the bottom part 8C of the valve device 10, a discharge valve 13 that can open and close the valve port 8a is located along the valve port 8a, and a valve holder 11 that limits the opening height of the discharge valve 13 is located as shown in FIG. It is mounted on the discharge valve 13 and fixed to the upper end plate 8 by a stator.
上記構造の圧縮機を運転すると気体や、蒸発器で蒸発し
きれない液体がシリンダ７の吸込ロアａに入り、前記シ
リンダ７の内壁、ローラ６・仕切板（図示せず）、上部
端板８、下部端９によって囲まれた空間に入る。そして
ローラ６かクランク軸５の偏心部にならって回転すると
、電体は圧縮され、上部端板８に形成されている弁口８
ａを経て、密閉容器１の内部に吐出される。When the compressor with the above structure is operated, gas and liquid that cannot be evaporated in the evaporator enters the suction lower a of the cylinder 7, and enters the inner wall of the cylinder 7, the roller 6, the partition plate (not shown), and the upper end plate 8. , enters the space enclosed by the lower end 9. When the roller 6 rotates following the eccentric part of the crankshaft 5, the electric body is compressed and the valve port 8 formed in the upper end plate 8 is compressed.
a, and is discharged into the closed container 1.
発明が解決しようとする問題点
ところがかかる構造では、低温時圧縮機を始動直後、冷
凍装置の蒸発器で蒸発しきれない液冷媒が房ってくると
、液体は非圧縮性なので吸入ロアａから入った液体はシ
リンダ７の内壁、ローラ６、仕切板、上下端板８、で囲
まれた空間で圧縮されるが圧縮しきれず、ついには、弁
口８ａ、吐出弁１３には大きな圧力が働き、吐出弁１３
を破損させることがある。Problems to be Solved by the Invention However, with this structure, immediately after starting the compressor at low temperatures, when the liquid refrigerant that has not been evaporated in the evaporator of the refrigeration system comes up, the liquid is incompressible, so it is The liquid that has entered is compressed in the space surrounded by the inner wall of the cylinder 7, the roller 6, the partition plate, and the upper and lower end plates 8, but it cannot be compressed completely, and eventually a large pressure acts on the valve port 8a and the discharge valve 13. , discharge valve 13
It may damage the.
またこの構造では圧縮機始動直後、液圧縮によυ大きな
負荷がかかるので電動機が所要の回転数に上るまでに負
荷が大きすぎて回転できなくなり、しまいには電動機を
焼損さすことがあった。In addition, with this structure, immediately after the compressor starts, a large load is applied due to liquid compression, so by the time the motor reaches the required rotation speed, the load is too large and the motor cannot rotate, resulting in burnout of the motor.
また始動直後の負荷のもとで運転するには電動機の始動
トルクを大きくしなければならず大きな電動機を必要と
したり始動トルクを上げる為にＰＳＣ始動方式の電動機
部の補助巻線をの巻数を多くとらなければならずその為
に主巻線の巻数を多くとれなくなり始動から安定運転に
なった時の効率が悪くなるという問題を有していた。In addition, in order to operate under a load immediately after starting, the starting torque of the motor must be increased, and a larger motor is required.In order to increase the starting torque, the number of turns of the auxiliary winding of the motor part of the PSC starting method must be increased. As a result, the number of turns in the main winding cannot be increased, resulting in a problem in which efficiency deteriorates from start to stable operation.
問題点を解決するだめの手段
本発明は前記問題点を解決するため尾、圧縮機の吐出弁
と端板の間に形状記憶合金からなる伸縮変形部材を設け
、この伸縮変形部材の伸縮変形動作により吐出弁の開閉
位置を変化させる。そして始動時の圧縮機の温度の低い
時には吐出弁を開いておき、温度の高くなった通常の運
転時には吐出弁が開閉動作をするように形状記憶合金の
形状記憶原理を利用し吐出弁の開閉位置を変化さすもの
である。Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides an elastically deformable member made of a shape memory alloy between the discharge valve and the end plate of the compressor. Change the open/close position of the valve. Then, when the compressor temperature is low at startup, the discharge valve is opened, and during normal operation when the temperature is high, the discharge valve opens and closes using the shape memory principle of shape memory alloy. It changes the position.
作 用
これにより圧縮機始動時の圧縮機の温度の低い時には形
状記憶合金からなる伸縮変形部材は吐出弁を押し上げ吐
出弁を開くので圧縮されることなく液体が吐出口より吐
出される。吐出弁が開かれているので負荷は小さく電動
機は回転しやすい。As a result, when the temperature of the compressor is low at the time of starting the compressor, the elastic deformable member made of the shape memory alloy pushes up the discharge valve and opens the discharge valve, so that the liquid is discharged from the discharge port without being compressed. Since the discharge valve is open, the load is small and the motor rotates easily.
また起動より時間がたち圧縮機の温度が上ってくると押
し上げてた吐出弁を下げ吐出弁の開閉位置まで変化する
。従って高温時には通常の圧縮動作をする。この動作は
形状記憶合金の低温時の形状記憶と高温時の形状記憶を
利用している為、繰返し使用出来る。これにより始動時
の液圧縮による吐出弁の破損を防止し、始動不良による
電動機の焼損を防止し、圧縮機の温度の上った通常運転
時には効率の良い運転をし低コスト、高効率の圧縮とす
ることができる。Also, as time passes after startup and the temperature of the compressor rises, the discharge valve, which had been pushed up, is lowered and changes to the open/close position of the discharge valve. Therefore, normal compression operation occurs at high temperatures. This operation utilizes the shape memory of the shape memory alloy at low temperatures and shape memory at high temperatures, so it can be used repeatedly. This prevents damage to the discharge valve due to liquid compression during startup, prevents burnout of the motor due to poor startup, and allows efficient operation during normal operation when the compressor temperature is high, resulting in low-cost, high-efficiency compression. It can be done.
実施例 以下、本発明の一実施例を第１図を参考に説明する。Example An embodiment of the present invention will be described below with reference to FIG.
１４は弁室を有する側の端板（以下上部端板と称す）、
１４ａは凹状に形成された弁室、１４ｂはシリンダ７と
連通された弁口である。１５はニッケルーチタン合金な
どのような形状記憶合金からなる伸縮変形部材で低温時
には吐出弁１３を開く方向に押し上げる形状にしである
。高温時には吐出弁１３の開閉を出来る端板１４側に下
がるように形状が変化する。弁装置は弁押え１６、吐出
弁１３と前記伸縮変形部材１５と前記上部端板１４の端
面と固定子１７によって構成されている。14 is an end plate on the side having the valve chamber (hereinafter referred to as the upper end plate);
14a is a valve chamber formed in a concave shape, and 14b is a valve port communicating with the cylinder 7. Reference numeral 15 denotes a telescopic member made of a shape memory alloy such as a nickel-titanium alloy, which is shaped to push up the discharge valve 13 in the direction of opening when the temperature is low. When the temperature is high, the shape changes so that it is lowered toward the end plate 14 that allows the discharge valve 13 to open and close. The valve device is composed of a valve holder 16, a discharge valve 13, the telescopically deformable member 15, an end surface of the upper end plate 14, and a stator 17.
上記構造の形状記憶合金からなる伸縮変形部材を具備し
た弁装置付きの圧縮機を運転すると、圧縮部で圧縮され
た気体や液体が上部端板１４の弁口１４ｂを通り、弁装
置に吐出する。すると始動時は第１図ｂｓｃの様に圧縮
機の温度が低いので伸縮変形部材１５は低温時の弁押え
１６側に変形した形状となる。吐出弁１ａには伸縮変形
部材１５と当接するので吐出弁１ａは端板１４より上に
押し上げられ吐出弁１ａが開いたままの形となる。When a compressor equipped with a valve device equipped with an expandable and deformable member made of a shape memory alloy having the above structure is operated, gas or liquid compressed in the compression section passes through the valve port 14b of the upper end plate 14 and is discharged to the valve device. . Then, at the time of starting, the temperature of the compressor is low as shown in FIG. 1bsc, so the telescopically deformable member 15 assumes a shape deformed toward the valve holder 16 at low temperature. Since the discharge valve 1a comes into contact with the telescopically deformable member 15, the discharge valve 1a is pushed up above the end plate 14, and the discharge valve 1a remains open.
従って、圧縮されることなく、気体や液体が吐出される
。また始動から時間がたち圧縮機の温度が上昇し形状記
憶合金の変態温度によると第１図ａ、ｂに示す様に低温
時の形状から高温時の形状へと形状変化を生じ伸縮変形
部材１５は端板側へ下がる。Therefore, gas or liquid is discharged without being compressed. Further, as time passes after startup, the temperature of the compressor rises, and according to the transformation temperature of the shape memory alloy, the shape changes from the shape at a low temperature to the shape at a high temperature, as shown in FIG. goes down toward the end plate.
従ってｌ小弁１３は弁Ｄ １４ ｂと接する位置になり
、圧縮動作を繰り返す。この状態、では従来の伸、縮変
形部材１５のない圧縮機と同じ働きをする。Therefore, the l small valve 13 comes into contact with the valve D 14 b, and the compression operation is repeated. In this state, it functions in the same way as a conventional compressor without the expansion/contraction deformation member 15.
従って始動時は吐出弁１３が開いた状態となりシリンダ
３に流入した液体も大きな圧力とならずに吐出されるの
で吐出ブＦ１３を破損さすこともなく吐出時の負荷も少
なくて済む為に始動不良による電動機を焼損さすことも
ない１．また始動には大きな負荷を必要としないので小
型電動機することができる。Therefore, at the time of startup, the discharge valve 13 is in an open state, and the liquid that has flowed into the cylinder 3 is discharged without creating a large pressure, so the discharge valve F13 is not damaged and the load at the time of discharge is small, resulting in starting problems. 1. There is no risk of burning out the electric motor. In addition, since a large load is not required for starting, a small electric motor can be used.
さらに形状記憶合金の形状記憶合金を利用しているだめ
、電気的な装置を必要とすることもなく部品点数も少く
繰返し使用することができる。Furthermore, since a shape memory alloy is used, no electrical equipment is required, the number of parts is small, and it can be used repeatedly.
発明の効果
上記実施例より明らかなように、本発明の圧縮機の弁装
置は、形状記憶合金からなる伸縮変形部材を用いて吐出
弁の位置を変化さす為、始動時は始動し、やすく、吐出
弁を破損することなく、始動不良による電動機の焼損を
生ずることなく、しかも通常の運転の性能を中心にした
電動機を選定すれば良いので高効率で低コスト、長寿命
の圧縮機とすることが出来る。また′眠気部品等を必要
としないので部品点数も少くて済み安価なものとして提
供することができる等の効果を奏する。Effects of the Invention As is clear from the above embodiments, the compressor valve device of the present invention changes the position of the discharge valve using a telescopically deformable member made of a shape memory alloy. A compressor with high efficiency, low cost, and long life can be achieved by selecting a motor that focuses on the performance of normal operation without damaging the discharge valve or burning out the motor due to poor starting. I can do it. Furthermore, since no drowsy parts are required, the number of parts can be reduced and the product can be provided at low cost.
第１図ａは本発明の伸縮変形部材を具備した弁装置の平
面図、第１図す、ｃは始動時の伸縮変形部材の位置を示
す同図ａのそれぞれＡＡ線断面図およびＢＢ線断面図、
第１図ｒｉｓｅは始動より温度が上昇した後の伸縮変形
部材の位置を示す同図ａのそれぞれＡＡ線断面図および
ＢＢ線断面図、第２図は従来の圧縮機を示す一部断面図
、第３図は従来の弁装置を示す平面図、第４図、第５図
は第３図のそれぞれＡＡ線断面図およびＢＢ線断面図で
ある。
１３・・・・・・吐出弁、１４・・・・・・上部端板、
１４ｂ・・・・・・弁口、１５・・・・・・伸縮変形部
材、１６・・・・・・弁押え、１７・・・・・・固定子
。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名Ｓ
モ第２図
第３図
第４図 第５図Fig. 1a is a plan view of a valve device equipped with the telescopically deformable member of the present invention, and Figs. figure,
FIG. 1 rise is a cross-sectional view taken along line AA and line BB in FIG. FIG. 3 is a plan view showing a conventional valve device, and FIGS. 4 and 5 are sectional views taken along line AA and BB in FIG. 3, respectively. 13...Discharge valve, 14...Upper end plate,
14b... Valve port, 15... Expandable deformable member, 16... Valve holder, 17... Stator. Name of agent: Patent attorney Toshio Nakao and 1 other person S
Figure 2 Figure 3 Figure 4 Figure 5
Claims (1)
部と、前記電動機部とクランク軸により駆動されるロー
ラと、円筒状気筒であるシリンダおよび前記シリンダの
両端面を保持する２つの端板からなる圧縮機部とによっ
て圧縮機を構成し、前記端板に弁室を設け、この弁室に
シリンダと連通した弁口と、この弁口を開閉自在に閉じ
る吐出弁と、前記吐出弁を押える弁押えを設け、前記吐
出弁と前記端板の間に形状記憶合金からなる伸縮変形部
材を設け、この伸縮変形動作により吐出弁の開閉位置を
変化させる変化部を設けた圧縮機の弁装置。A sealed container, an electric motor section housed and fixed in the sealed container, a roller driven by the electric motor section and a crankshaft, a cylinder that is a cylindrical cylinder, and two end plates that hold both end surfaces of the cylinder. A compressor is configured by a compressor section, a valve chamber is provided in the end plate, a valve port communicating with the cylinder in the valve chamber, a discharge valve that can freely open and close the valve port, and a compressor that presses the discharge valve. A valve device for a compressor, which is provided with a valve holder, a telescopic deformable member made of a shape memory alloy between the discharge valve and the end plate, and a variable part that changes the open/close position of the discharge valve by the telescopic deformation action.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5402986A JPS62210283A (en) | 1986-03-12 | 1986-03-12 | Valve device for compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5402986A JPS62210283A (en) | 1986-03-12 | 1986-03-12 | Valve device for compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62210283A true JPS62210283A (en) | 1987-09-16 |
Family
ID=12959158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5402986A Pending JPS62210283A (en) | 1986-03-12 | 1986-03-12 | Valve device for compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62210283A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6299423B1 (en) * | 1999-03-23 | 2001-10-09 | Copeland Corporation | Scroll machine with discharge valve |
| US7866961B2 (en) | 2004-12-06 | 2011-01-11 | Daikin Industries, Ltd. | Compressor with discharge valve arrangement |
| FR2978507A1 (en) * | 2011-07-29 | 2013-02-01 | Renault Sa | VARIABLE FLOW OIL PUMP COMPRISING A SYSTEM FOR CONTROLLING OIL PRESSURE BASED ON TEMPERATURE |
| CN112709694A (en) * | 2020-12-31 | 2021-04-27 | 珠海格力节能环保制冷技术研究中心有限公司 | Quiet dish subassembly and compressor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS615373B2 (en) * | 1981-07-07 | 1986-02-18 | Toshio Aono |
-
1986
- 1986-03-12 JP JP5402986A patent/JPS62210283A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS615373B2 (en) * | 1981-07-07 | 1986-02-18 | Toshio Aono |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6299423B1 (en) * | 1999-03-23 | 2001-10-09 | Copeland Corporation | Scroll machine with discharge valve |
| US7866961B2 (en) | 2004-12-06 | 2011-01-11 | Daikin Industries, Ltd. | Compressor with discharge valve arrangement |
| FR2978507A1 (en) * | 2011-07-29 | 2013-02-01 | Renault Sa | VARIABLE FLOW OIL PUMP COMPRISING A SYSTEM FOR CONTROLLING OIL PRESSURE BASED ON TEMPERATURE |
| EP2551525A3 (en) * | 2011-07-29 | 2017-09-06 | Renault S.A.S. | Variable-flow oil pump comprising a system for regulating oil pressure according to temperature |
| CN112709694A (en) * | 2020-12-31 | 2021-04-27 | 珠海格力节能环保制冷技术研究中心有限公司 | Quiet dish subassembly and compressor |
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