WO2018207737A1 - Closed compressor and refrigeration device using same - Google Patents
Closed compressor and refrigeration device using same Download PDFInfo
- Publication number
- WO2018207737A1 WO2018207737A1 PCT/JP2018/017652 JP2018017652W WO2018207737A1 WO 2018207737 A1 WO2018207737 A1 WO 2018207737A1 JP 2018017652 W JP2018017652 W JP 2018017652W WO 2018207737 A1 WO2018207737 A1 WO 2018207737A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- shaft
- rotor
- hermetic compressor
- fixed
- cylinder
- Prior art date
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
Definitions
- the present invention relates to a hermetic compressor and a refrigeration apparatus such as a home electric refrigerator-freezer or a showcase using the same.
- FIG. 4 is a longitudinal sectional view of a compression mechanism and an electric element of a conventional hermetic compressor described in Patent Document 1.
- the conventional hermetic compressor includes a shaft 8 for driving a compression mechanism including a main shaft 4 and an eccentric shaft 6, and a bearing 10 that supports the main shaft 4.
- a sliding portion 12 is formed, and a sliding portion 14 is formed on the inner peripheral surface of the bearing 10.
- the electric element 18 that rotationally drives the shaft 8 is an outer rotor type motor, and includes a stator 20 and a rotor 22 that is disposed coaxially with the stator 20 so as to surround the stator 20. .
- a permanent magnet 28 is disposed at an outer peripheral end portion 26 of a disk-shaped frame 24, and a cylindrical rotor shaft hole 30 portion formed at the center of the frame 24 is welded or shrink-fitted to the outer periphery of the shaft 8. It is fixed by being equal.
- the stator 20 is fixed to the outer peripheral surface 23 of the bearing 10 by welding.
- the thickness of the steel plate of the frame 24 constituting the rotor shaft hole 30 of the rotor 22 is shrink fitting or press fitting. In other words, it cannot withstand the stress generated in the case of, and cannot be firmly fixed.
- the conventional hermetic compressor has a drawback in terms of durability.
- the present invention solves the above-mentioned conventional problems, and provides a highly durable hermetic compressor and a refrigeration apparatus using the same so that a rotor can be firmly fixed to a cast iron shaft by welding. It is for the purpose.
- a hermetic compressor includes an outer rotor type including an electric element and a rotor disposed coaxially with the stator so as to surround the outer periphery of the stator. It is a motor, a steel cylinder is fixed to the shaft of the electric element, and a rotor is welded and fixed to the steel cylinder.
- a steel cylinder is shrink-fitted onto a shaft and fixed by press-fitting or bonding, and the rotor is welded and fixed to the steel cylinder.
- the durability of the hermetic compressor and the refrigeration apparatus using the same can be improved.
- an electric element and a compression element driven by the electric element are accommodated in an airtight container.
- the compression element includes a shaft composed of a main shaft and an eccentric shaft, and a main shaft of the shaft.
- a cylinder block having a shaft bearing and a cylinder, a piston that reciprocates in the cylinder, and a connecting means that connects the eccentric shaft and the piston.
- the electric element includes a stator and a stator.
- An outer rotor type motor having a rotor arranged coaxially with the stator so as to surround the outer periphery of the motor, and a steel cylinder is fixed to the shaft by, for example, shrink fitting, press fitting, or bonding. The rotor is welded and fixed to the steel cylinder.
- the rotor of the outer rotor type motor can be firmly fixed to the shaft, so that the durability of the hermetic compressor can be improved.
- the second invention has a structure in which, in the first invention, the steel cylinder is fixed to the shaft by shrinkage fitting, whereby the steel cylinder can be easily fixed to the shaft.
- a steel cylinder is fixed to the shaft by press fitting, and thereby the steel cylinder can be more easily fixed.
- the fourth aspect of the invention is the structure of the first aspect of the invention, wherein the steel cylinder is fixed to the shaft with an adhesive, whereby the steel cylinder can be easily fixed and the shaft is deformed. Can be suppressed.
- a flange is provided at the end of the steel cylinder on the bearing side, thereby facilitating positioning when welding the rotor to the cylinder. Can be done.
- the electric element of the hermetic compressor according to any one of the first to fifth aspects is driven by an inverter circuit at a plurality of rotational speeds.
- the seventh invention is a refrigeration apparatus using the hermetic compressor of any one of the first to sixth inventions, and since the hermetic compressor has high durability, the refrigeration apparatus has durability and reliability. Can be improved.
- FIG. 1 is a cross-sectional view of a hermetic compressor according to Embodiment 1 of the present invention.
- the hermetic compressor according to the first embodiment is configured by arranging a compressor body 108 inside a hermetic container 102 formed by drawing a steel plate.
- the compressor body 108 includes an electric element 104 and a compression element 106 driven by the electric element 104, and is elastically supported by a suspension spring 120.
- a refrigerant gas 122 such as a hydrocarbon-based R600a having a low global warming potential is at a pressure that is the same as the low pressure side of the refrigeration apparatus (not shown) and in a relatively low temperature state.
- lubricating oil 124 is sealed at the inner bottom of the sealed container 102.
- the compression element 106 includes a shaft 126, a cylinder block 128, a piston 130, a connecting means 132, and the like.
- the shaft 126 includes an eccentric shaft 134 and a main shaft 136, and includes an oil supply mechanism 138 that supplies the oil 124 from the lower end of the main shaft 136 immersed in the oil 124 to the upper end of the eccentric shaft 134.
- the cylinder block 128 is integrally formed with a cylinder 142 that forms the compression chamber 140 and a bearing 144 that rotatably supports the main shaft 136.
- the main shaft 136 has a non-sliding portion 146 in which the outer diameter of the main shaft 136 is reduced (formed by hollowing out) at a part of the sliding portion 137 with the inner peripheral surface 135 of the bearing 144. Further, the non-sliding portion 146 of the main shaft 136 is disposed between the upper end and the lower end of the bearing 144.
- the material of the main shaft 136 is cast iron from the viewpoint of slidability.
- the electric element 104 is an outer rotor type motor composed of a stator 150 and a rotor 152 arranged coaxially with the stator 150 so as to surround the stator 150.
- the stator 150 includes a core 160 and a coil 162 wound around the core 160, and fixes the core 160 to the outer periphery of the bearing 144.
- the rotor 152 is configured by disposing a permanent magnet 158 at an outer peripheral end 156 of a disk-shaped frame 154, and the center of the frame 154 is fixed to the shaft 126.
- FIG. 2 shows a cross-sectional view of the main part of the peripheral portion including the rotor 152 and the shaft 126 in the same embodiment.
- the rotor 152 has a cylindrical shaft hole 164 formed at the center of its frame 154.
- a steel cylinder is formed on the outer periphery of the main shaft 136 so that there is a gap between the lower end of the bearing 144 and the flange 168 calibrated on the upper part of the steel cylinder 166 from the lower end of the bearing 144 in the axial direction.
- 166 is fixed by shrink fitting.
- a flange 168 is formed on the upper portion of the steel tube 166. Therefore, the flange 168 of the tube 166 abuts on the upper portion of the shaft hole 164, and the tube 166 extends below the lower end of the shaft hole 164.
- a shaft hole 164 of the rotor 152 is fixed to the outer periphery of the steel cylinder 166 by welding. Further, the rotor 152 is positioned in the vertical direction when the flange 168 of the steel tube 166 contacts the upper surface of the frame 154.
- Electric power supplied from a commercial power source (not shown) is supplied to the electric element 104 via an external inverter circuit (not shown), a current flows through the stator 150, a magnetic field is generated, and the spindle 136 is The fixed rotor 152 rotates. Then, the rotation of the rotor 152 causes the shaft 126 to rotate, and the piston 130 reciprocates in the cylinder 142 via the connecting means 132 that is rotatably attached to the eccentric shaft 134, so that the compression element 106 has a predetermined value. Perform compression operation.
- the frame 154 of the rotor 152 of the outer rotor type motor as in this embodiment is formed by pressing a steel plate.
- the shaft hole 164 provided at the center of the frame 154 is molded during the press work, but a thin steel plate is used for the press work and for suppressing the material cost.
- welding, shrink fitting, press fitting, or the like is generally used.
- the shaft hole 164 of the rotor 152 is formed of a thin steel plate, so that the strength is insufficient and the fixing is not possible.
- the steel tube 166 is fixed to the main shaft 136 by shrink fitting, and thus the shaft hole 164 of the rotor 152 is fixed to the fixed tube 166 by welding.
- the rotor 152 can be firmly fixed to the main shaft 136 via the steel cylinder 166. Accordingly, the durability of the hermetic compressor is dramatically improved.
- the cylinder 166 can be easily fixed to the shaft 126 (main shaft 136). In addition, when bonded, the deformation of the shaft 126 (main shaft 136) can be further suppressed.
- the axial positioning can be easily performed by applying the shaft hole 164 of the rotor 152 to the flange 168 of the cylinder 166. Therefore, productivity is improved and the rotor 152 can be reliably fixed to the main shaft 136.
- this hermetic compressor when driven at a plurality of revolutions by an inverter circuit as in this embodiment, a highly durable hermetically sealed type capable of reliable operation from a low revolution speed range to a high revolution speed range. It can be a compressor. That is, in low-speed operation, a torque in the rotational direction is applied between the shaft and the rotor due to torque fluctuations that occur during refrigerant compression. However, since the rotor 152 is firmly fixed to the shaft 126 via the steel cylinder 166, the rotor 152 does not shift even in low-speed operation with large torque fluctuation.
- FIG. 3 is a schematic diagram showing a configuration of a refrigeration apparatus equipped with the hermetic compressor described in the first embodiment. Here, an outline of the basic configuration of the refrigeration apparatus will be described.
- the refrigeration apparatus includes a heat-insulating box having an opening on one side, a main body 301 having a door structure that opens and closes the opening, and a compartment that divides the interior of the main body 301 into an article storage space 302 and a machine room 303.
- a wall 304 and a refrigerant circuit 305 for cooling the inside of the storage space 302 are provided.
- the refrigerant circuit 305 has a configuration in which the hermetic compressor described in Embodiment 1 as the compressor 306, the radiator 307, the decompression device 308, and the heat absorber 309 are connected in a ring shape. And the heat absorber 309 is arrange
- this refrigeration apparatus is equipped with the hermetic compressor described in the first embodiment of the present invention as the compressor 306, and this hermetic compressor replaces the rotor 152 of the outer rotor type motor with the steel. Since the durability is improved by being fixed to the main shaft 136 via the made cylinder 166, the durability can be improved.
- the hermetic compressor and the refrigeration apparatus according to the present invention can improve the durability of the hermetic compressor, it is not limited to household use such as an electric refrigerator or an air conditioner. It can be widely applied to refrigeration devices such as cases and vending machines.
Abstract
An electromotive element (104) is an outer rotor motor provided with a stator (150) and a rotor (152) which is disposed coaxially with the stator (150) so as to surround the outer periphery of the stator (150). A steel cylinder (166) is affixed to a shaft (126) of the electromotive element by shrink-fit, press-fit, bonding, or the like, and the rotor (152) is fixed to the steel cylinder (166) by welding. The abovementioned configuration enables the rotor (152) to be firmly affixed to the shaft (126) through the steel cylinder (166), enabling the provision of a highly durable enclosed compressor and a refrigerant device which uses the enclosed compressor.
Description
本発明は、密閉型圧縮機、および、それを用いた家庭用電気冷凍冷蔵庫又はショーケース等の冷凍装置に関するものである。
The present invention relates to a hermetic compressor and a refrigeration apparatus such as a home electric refrigerator-freezer or a showcase using the same.
近年、食材の多様化にともない家庭用電気冷凍冷蔵庫はその庫内容積の大容量化の要望が強まっている。そして、上記家庭用電気冷蔵庫は、外観寸法はそのままで庫内容積を広げることが要望され、これを実現するための１つの方法として、密閉型圧縮機を収納する機械室の縮小化が進められている。その結果、家庭用電気冷凍冷蔵庫及びその他の冷凍サイクル装置等に使用される密閉型圧縮機においては、小型化及び低背化が強く要望されている。
In recent years, with the diversification of foodstuffs, there is an increasing demand for an electric refrigerator-freezer for home use with a large internal volume. The household electric refrigerator is required to increase the internal volume while maintaining the external dimensions, and as one method for realizing this, the machine room for storing the hermetic compressor is being reduced. ing. As a result, there is a strong demand for downsizing and low height in hermetic compressors used in household electric refrigerator-freezers and other refrigeration cycle devices.
従来、この小型化及び低背化に適した密閉型圧縮機の電動要素としては、固定子の外側を回転子が回るアウターロータ型モータを採用したものがある。（例えば、特許文献１参照）。
Conventionally, as an electric element of a hermetic compressor suitable for this miniaturization and low profile, there is one that employs an outer rotor type motor in which a rotor rotates around the outside of a stator. (For example, refer to Patent Document 1).
図４は、特許文献１に記載された従来の密閉型圧縮機の圧縮機構と電動要素の縦断面図である。
FIG. 4 is a longitudinal sectional view of a compression mechanism and an electric element of a conventional hermetic compressor described in Patent Document 1.
図４に示すように、従来の密閉型圧縮機は、主軸４と偏心軸６を備えた圧縮機構駆動用のシャフト８と、主軸４を軸支する軸受１０とを備え、主軸４の外周には摺動部１２が形成され、軸受１０の内周面には摺動部１４が形成されている。
As shown in FIG. 4, the conventional hermetic compressor includes a shaft 8 for driving a compression mechanism including a main shaft 4 and an eccentric shaft 6, and a bearing 10 that supports the main shaft 4. A sliding portion 12 is formed, and a sliding portion 14 is formed on the inner peripheral surface of the bearing 10.
上記シャフト８を回転駆動する電動要素１８はアウターロータ型モータであり、固定子２０と、固定子２０の周りを囲むように固定子２０と同軸に配置された回転子２２とで構成されている。
The electric element 18 that rotationally drives the shaft 8 is an outer rotor type motor, and includes a stator 20 and a rotor 22 that is disposed coaxially with the stator 20 so as to surround the stator 20. .
回転子２２は、円盤状のフレーム２４の外周端部２６に永久磁石２８が配置され、フレーム２４の中心に形成された円筒状の回転子軸孔３０部分がシャフト８の外周に溶接又は焼き嵌め等することによって固定されている。また固定子２０は、軸受１０の外周面２３に溶接で固定されている。
In the rotor 22, a permanent magnet 28 is disposed at an outer peripheral end portion 26 of a disk-shaped frame 24, and a cylindrical rotor shaft hole 30 portion formed at the center of the frame 24 is welded or shrink-fitted to the outer periphery of the shaft 8. It is fixed by being equal. The stator 20 is fixed to the outer peripheral surface 23 of the bearing 10 by welding.
しかしながら、前記従来の構成では、シャフト８の材質が鋳鉄の場合、回転子２２をシャフト８に溶接固定する際、シャフト８の溶接部が溶融し、急冷すると白銑化してしまい、硬くもろくなる。また、鋳鉄は溶接時の加熱により、含まれている多量の黒鉛が粗大化し、黒鉛と基材に隙間が生じ、割れが発生してしまうという課題を有していた。
However, in the conventional configuration, when the material of the shaft 8 is cast iron, when the rotor 22 is fixed to the shaft 8 by welding, the welded portion of the shaft 8 is melted, and when rapidly cooled, it becomes white and becomes brittle. In addition, cast iron has a problem that a large amount of graphite contained in the cast iron becomes coarse due to heating during welding, a gap is formed between the graphite and the base material, and cracks are generated.
また、回転子２２の回転子軸孔３０をシャフト８に焼き嵌め又は圧入によって固定する場合、回転子２２の回転子軸孔３０を構成しているフレーム２４の鋼板の厚みでは、焼嵌め又は圧入で発生する応力に耐えることができず、しっかりと固定できないといった課題を有していた。
Further, when the rotor shaft hole 30 of the rotor 22 is fixed to the shaft 8 by shrink fitting or press fitting, the thickness of the steel plate of the frame 24 constituting the rotor shaft hole 30 of the rotor 22 is shrink fitting or press fitting. In other words, it cannot withstand the stress generated in the case of, and cannot be firmly fixed.
以上のようなことから、従来の密閉型圧縮機は耐久性の点で難点があった。
As described above, the conventional hermetic compressor has a drawback in terms of durability.
本発明は、前記従来の課題を解決したもので、鋳鉄製のシャフトに回転子を溶接で強固に固定できるようにして、耐久性の高い密閉型圧縮機およびそれを用いた冷凍装置を提供することを目的としたものである。
The present invention solves the above-mentioned conventional problems, and provides a highly durable hermetic compressor and a refrigeration apparatus using the same so that a rotor can be firmly fixed to a cast iron shaft by welding. It is for the purpose.
前記従来の課題を解決するために、本発明の密閉型圧縮機は、電動要素が固定子と固定子の外周を囲むように固定子と同軸で配置された回転子とを備えたアウターロータ型モータであって、当該電動要素のシャフトに鋼製の筒を固定し、この鋼製の筒に回転子を溶接固定したものである。
In order to solve the above-described conventional problems, a hermetic compressor according to the present invention includes an outer rotor type including an electric element and a rotor disposed coaxially with the stator so as to surround the outer periphery of the stator. It is a motor, a steel cylinder is fixed to the shaft of the electric element, and a rotor is welded and fixed to the steel cylinder.
本発明の密閉型圧縮機は、シャフトに鋼製の筒を焼嵌め、圧入又は接着などで固定し、この鋼製の筒に回転子を溶接固定しているので、回転子をシャフトに強固に固定でき、密閉型圧縮機およびそれを用いた冷凍装置の耐久性を向上することができる。
In the hermetic compressor of the present invention, a steel cylinder is shrink-fitted onto a shaft and fixed by press-fitting or bonding, and the rotor is welded and fixed to the steel cylinder. The durability of the hermetic compressor and the refrigeration apparatus using the same can be improved.
第１の発明は、密閉容器内に、電動要素と、前記電動要素によって駆動される圧縮要素を収容し、前記圧縮要素は、主軸と偏心軸とから構成されるシャフトと、前記シャフトの主軸を軸支する軸受とシリンダとを有するシリンダブロックと、前記シリンダ内で往復運動するピストンと、前記偏心軸と前記ピストンとを連結する連結手段とを備え、前記電動要素は、固定子と前記固定子の外周を囲むように前記固定子と同軸で配置された回転子とを備えたアウターロータ型モータとし、かつ、前記シャフトには鋼製の筒を例えば焼嵌め、圧入、又は接着などで固定し、前記鋼製の筒に前記回転子を溶接固定した構成としてある。
According to a first aspect of the present invention, an electric element and a compression element driven by the electric element are accommodated in an airtight container. The compression element includes a shaft composed of a main shaft and an eccentric shaft, and a main shaft of the shaft. A cylinder block having a shaft bearing and a cylinder, a piston that reciprocates in the cylinder, and a connecting means that connects the eccentric shaft and the piston. The electric element includes a stator and a stator. An outer rotor type motor having a rotor arranged coaxially with the stator so as to surround the outer periphery of the motor, and a steel cylinder is fixed to the shaft by, for example, shrink fitting, press fitting, or bonding. The rotor is welded and fixed to the steel cylinder.
これにより、アウターロータ型モータの回転子を強固にシャフトに固定することができるので、密閉型圧縮機の耐久性を向上させることが出来る。
Thereby, the rotor of the outer rotor type motor can be firmly fixed to the shaft, so that the durability of the hermetic compressor can be improved.
第２の発明は、特に、第１の発明において、鋼鉄製の筒をシャフトに焼嵌めで固定した構成としてあり、これにより、容易に鋼鉄製の筒をシャフトに固定できる。
The second invention has a structure in which, in the first invention, the steel cylinder is fixed to the shaft by shrinkage fitting, whereby the steel cylinder can be easily fixed to the shaft.
第３の発明は、特に、第１の発明において、鋼鉄製の筒をシャフトに圧入で固定した構成としてあり、これにより、鋼鉄製の筒をより容易に固定することができる。
In the third invention, in particular, in the first invention, a steel cylinder is fixed to the shaft by press fitting, and thereby the steel cylinder can be more easily fixed.
第４の発明は、特に、第１の発明において、鋼鉄製の筒をシャフトに接着剤で固定した構成としてあり、これにより、鋼鉄製の筒を容易に固定することができるとともに、シャフトの変形を抑制することができる。
In particular, the fourth aspect of the invention is the structure of the first aspect of the invention, wherein the steel cylinder is fixed to the shaft with an adhesive, whereby the steel cylinder can be easily fixed and the shaft is deformed. Can be suppressed.
第５の発明は、第１～４のいずれか１つの発明において、鋼鉄製の筒の軸受側の端に鍔を設けた構成としてあり、これにより回転子を筒に溶接する際に位置決めを容易におこなうことができる。
According to a fifth invention, in any one of the first to fourth inventions, a flange is provided at the end of the steel cylinder on the bearing side, thereby facilitating positioning when welding the rotor to the cylinder. Can be done.
第６の発明は、第１～５のいずれか１つの発明の密閉型圧縮機の電動要素をインバータ回路により複数の回転数で駆動する構成としてある。
In a sixth aspect of the invention, the electric element of the hermetic compressor according to any one of the first to fifth aspects is driven by an inverter circuit at a plurality of rotational speeds.
これにより、低回転数域から高回転数域まで信頼性の高い運転が可能な高耐久型の密閉型圧縮機を実現することができる。すなわち、低回転数運転においては、冷媒圧縮時に発生するトルク変動により、シャフトと回転子の間に回転方向の力がかかる。しかし、回転子とシャフトの間に鋼製の筒を介在させている。すなわち、シャフトに鋼製の筒を固定して当該筒に回転子を溶接し強固に固定している。そのため、回転子がシャフトからずれるのを防止できる。また、高回転数運転においては、回転子に大きな遠心力が働くが、このような大きな遠心力が働いても回転子がシャフトからずれることを防止できる。このようなことから、耐久性が高く信頼性の高い運転が可能な密閉型圧縮機を実現することができる。
This makes it possible to realize a highly durable hermetic compressor capable of reliable operation from a low speed range to a high speed range. That is, in low-speed operation, a torque in the rotational direction is applied between the shaft and the rotor due to torque fluctuations that occur during refrigerant compression. However, a steel cylinder is interposed between the rotor and the shaft. That is, a steel cylinder is fixed to the shaft, and a rotor is welded to the cylinder and firmly fixed. Therefore, it is possible to prevent the rotor from being displaced from the shaft. Further, in high speed operation, a large centrifugal force acts on the rotor, but even if such a large centrifugal force acts, the rotor can be prevented from shifting from the shaft. For this reason, it is possible to realize a hermetic compressor that can operate with high durability and high reliability.
第７の発明は、第１～６のいずれかの１つの発明の密閉型圧縮機を用いた冷凍装置であり、密閉型圧縮機の耐久性が高いので、冷凍装置の耐久性とともに信頼性も向上することができる。
The seventh invention is a refrigeration apparatus using the hermetic compressor of any one of the first to sixth inventions, and since the hermetic compressor has high durability, the refrigeration apparatus has durability and reliability. Can be improved.
以下、本発明の実施の形態について、図面を参照しながら説明する。なお、この実施の形態によって本発明が限定されるものではない。
Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.
（実施の形態１）
図１は、本発明の実施の形態１における密閉型圧縮機の断面図である。 (Embodiment 1)
FIG. 1 is a cross-sectional view of a hermetic compressor according to Embodiment 1 of the present invention.
図１は、本発明の実施の形態１における密閉型圧縮機の断面図である。 (Embodiment 1)
FIG. 1 is a cross-sectional view of a hermetic compressor according to Embodiment 1 of the present invention.
図１において、本実施の形態１における密閉型圧縮機は、鋼板の絞り成型によって形成された密閉容器１０２の内部に圧縮機本体１０８を配置して構成してある。
1, the hermetic compressor according to the first embodiment is configured by arranging a compressor body 108 inside a hermetic container 102 formed by drawing a steel plate.
圧縮機本体１０８は、電動要素１０４と、この電動要素１０４によって駆動される圧縮要素１０６とからなり、サスペンションスプリング１２０によって弾性的に支持されている。
The compressor body 108 includes an electric element 104 and a compression element 106 driven by the electric element 104, and is elastically supported by a suspension spring 120.
さらに、密閉容器１０２内には、例えば、地球温暖化係数の低い炭化水素系のＲ６００ａ等の冷媒ガス１２２が、冷凍装置（図示せず）の低圧側と同等圧力で、比較的低温の状態で封入されると共に、密閉容器１０２内底部には、潤滑用のオイル１２４が封入されている。
Further, in the sealed container 102, for example, a refrigerant gas 122 such as a hydrocarbon-based R600a having a low global warming potential is at a pressure that is the same as the low pressure side of the refrigeration apparatus (not shown) and in a relatively low temperature state. While being sealed, lubricating oil 124 is sealed at the inner bottom of the sealed container 102.
圧縮要素１０６は、シャフト１２６、シリンダブロック１２８、ピストン１３０、連結手段１３２等で構成されている。
The compression element 106 includes a shaft 126, a cylinder block 128, a piston 130, a connecting means 132, and the like.
シャフト１２６は、偏心軸１３４と主軸１３６からなり、オイル１２４に浸漬された主軸１３６の下端から偏心軸１３４の上端までオイル１２４を供給する給油機構１３８を備えている。
The shaft 126 includes an eccentric shaft 134 and a main shaft 136, and includes an oil supply mechanism 138 that supplies the oil 124 from the lower end of the main shaft 136 immersed in the oil 124 to the upper end of the eccentric shaft 134.
シリンダブロック１２８は、圧縮室１４０を形成するシリンダ１４２と主軸１３６を回転自在に軸支する軸受１４４が一体に形成されている。
The cylinder block 128 is integrally formed with a cylinder 142 that forms the compression chamber 140 and a bearing 144 that rotatably supports the main shaft 136.
主軸１３６は、軸受１４４の内周面１３５との摺動部１３７の一部に、主軸１３６の外径を細くした（中抜きで形成した）非摺動部１４６を有している。また、主軸１３６の非摺動部１４６は、軸受１４４の上端と下端の間に配置されている。
The main shaft 136 has a non-sliding portion 146 in which the outer diameter of the main shaft 136 is reduced (formed by hollowing out) at a part of the sliding portion 137 with the inner peripheral surface 135 of the bearing 144. Further, the non-sliding portion 146 of the main shaft 136 is disposed between the upper end and the lower end of the bearing 144.
また、主軸１３６の材質は、摺動性の観点から鋳鉄を使用している。
In addition, the material of the main shaft 136 is cast iron from the viewpoint of slidability.
電動要素１０４は、固定子１５０と、固定子１５０の周りを囲むように固定子１５０と同軸で配置された回転子１５２とで構成されたアウターロータ型モータである。
The electric element 104 is an outer rotor type motor composed of a stator 150 and a rotor 152 arranged coaxially with the stator 150 so as to surround the stator 150.
固定子１５０は、コア１６０とこのコア１６０に巻回されたコイル１６２とから構成され、コア１６０を軸受１４４の外周に固定している。
The stator 150 includes a core 160 and a coil 162 wound around the core 160, and fixes the core 160 to the outer periphery of the bearing 144.
回転子１５２は、円盤状のフレーム１５４の外周端部１５６に永久磁石１５８を配置して構成されており、フレーム１５４の中心が前記シャフト１２６に固定されている。
The rotor 152 is configured by disposing a permanent magnet 158 at an outer peripheral end 156 of a disk-shaped frame 154, and the center of the frame 154 is fixed to the shaft 126.
ここで、図２に、同実施の形態における回転子１５２とシャフト１２６を含むその周辺部分の要部断面図を示す。
Here, FIG. 2 shows a cross-sectional view of the main part of the peripheral portion including the rotor 152 and the shaft 126 in the same embodiment.
図２において、回転子１５２は、そのフレーム１５４の中心に円筒状の軸孔１６４が形成されている。
2, the rotor 152 has a cylindrical shaft hole 164 formed at the center of its frame 154.
また、軸受１４４の下端から軸下方向に、軸受１４４の下端と鋼製の筒１６６の上部に較正されている鍔１６８との間に隙間を有するように、主軸１３６の外周に鋼製の筒１６６を焼嵌めで固定している。鋼製の筒１６６の上部には鍔１６８が構成されている。よって、軸孔１６４の上部には筒１６６の鍔１６８が当接すると共に、軸孔１６４の下端より下方へは筒１６６が延設されている。この鋼製の筒１６６の外周に前記回転子１５２の軸穴１６４が溶接で固定されている。また、回転子１５２は、鋼製の筒１６６の鍔１６８がフレーム１５４の上面に接触することにより、鉛直方向に位置決めされる。
Further, a steel cylinder is formed on the outer periphery of the main shaft 136 so that there is a gap between the lower end of the bearing 144 and the flange 168 calibrated on the upper part of the steel cylinder 166 from the lower end of the bearing 144 in the axial direction. 166 is fixed by shrink fitting. A flange 168 is formed on the upper portion of the steel tube 166. Therefore, the flange 168 of the tube 166 abuts on the upper portion of the shaft hole 164, and the tube 166 extends below the lower end of the shaft hole 164. A shaft hole 164 of the rotor 152 is fixed to the outer periphery of the steel cylinder 166 by welding. Further, the rotor 152 is positioned in the vertical direction when the flange 168 of the steel tube 166 contacts the upper surface of the frame 154.
以上のように構成された密閉型圧縮機について、以下その動作、作用を説明する。
The operation and action of the hermetic compressor configured as described above will be described below.
商用電源（図示せず）から供給される電力は、外部のインバータ回路（図示せず）を介して、電動要素１０４に供給され、固定子１５０に電流が流れ、磁界が発生し、主軸１３６に固定された回転子１５２が回転する。そして、この回転子１５２の回転により、シャフト１２６が回転し、偏心軸１３４に回転自在に取り付けられた連結手段１３２を介して、ピストン１３０がシリンダ１４２内を往復運動し、圧縮要素１０６が所定の圧縮動作を行う。
Electric power supplied from a commercial power source (not shown) is supplied to the electric element 104 via an external inverter circuit (not shown), a current flows through the stator 150, a magnetic field is generated, and the spindle 136 is The fixed rotor 152 rotates. Then, the rotation of the rotor 152 causes the shaft 126 to rotate, and the piston 130 reciprocates in the cylinder 142 via the connecting means 132 that is rotatably attached to the eccentric shaft 134, so that the compression element 106 has a predetermined value. Perform compression operation.
次に、回転子１５２が、鋼製の筒１６６を介して主軸１３６に固定された作用と効果について説明する。
Next, the operation and effect in which the rotor 152 is fixed to the main shaft 136 via the steel cylinder 166 will be described.
本実施の形態のようなアウターロータ型モータの回転子１５２のフレーム１５４は鋼板をプレス加工などして成型されている。フレーム１５４の中心に設けた軸穴１６４はプレス加工の際に成型されているが、プレス加工をするためと、材料費を抑制するために、薄い鋼板が用いられている。回転子１５２の軸穴１６４を主軸１３６に固定するには溶接、焼嵌め、もしくは圧入等を用いるのが一般的であるが、主軸１３６の材質が鋳鉄であるため、一般的に溶接は困難である。また、焼嵌め又は圧入を用いるには回転子１５２の軸穴１６４が薄い鋼板で構成されているので、強度が不足し、しっかりと固定ができない。
The frame 154 of the rotor 152 of the outer rotor type motor as in this embodiment is formed by pressing a steel plate. The shaft hole 164 provided at the center of the frame 154 is molded during the press work, but a thin steel plate is used for the press work and for suppressing the material cost. In order to fix the shaft hole 164 of the rotor 152 to the main shaft 136, welding, shrink fitting, press fitting, or the like is generally used. However, since the material of the main shaft 136 is cast iron, generally welding is difficult. is there. Further, in order to use shrink fitting or press fitting, the shaft hole 164 of the rotor 152 is formed of a thin steel plate, so that the strength is insufficient and the fixing is not possible.
しかしながら、本実施の形態の密閉型圧縮機は、主軸１３６に鋼製の筒１６６を焼嵌めで固定しているので、その固定された筒１６６に回転子１５２の軸穴１６４を溶接で固定することができ、回転子１５２は鋼製の筒１６６を介して主軸１３６に強固に固定することができる。したがって、密閉型圧縮機の耐久性が飛躍的に向上する。
However, in the hermetic compressor according to the present embodiment, the steel tube 166 is fixed to the main shaft 136 by shrink fitting, and thus the shaft hole 164 of the rotor 152 is fixed to the fixed tube 166 by welding. The rotor 152 can be firmly fixed to the main shaft 136 via the steel cylinder 166. Accordingly, the durability of the hermetic compressor is dramatically improved.
なお、上記筒１６６の固定方法を圧入にすると、容易に筒１６６をシャフト１２６（主軸１３６）に固定ができる。また、接着にすると、さらにシャフト１２６（主軸１３６）の変形を抑制することができる。
In addition, if the fixing method of the said cylinder 166 is press-fit, the cylinder 166 can be easily fixed to the shaft 126 (main shaft 136). In addition, when bonded, the deformation of the shaft 126 (main shaft 136) can be further suppressed.
また、本実施の形態では上記筒１６６に鍔１６８が設けてあるので、この筒１６６の鍔１６８に回転子１５２の軸穴１６４をあてることで軸方向の位置決めが容易に出来る。よって、生産性が向上するとともに、主軸１３６に回転子１５２を確実に固定することができる。
Further, in the present embodiment, since the flange 168 is provided in the cylinder 166, the axial positioning can be easily performed by applying the shaft hole 164 of the rotor 152 to the flange 168 of the cylinder 166. Therefore, productivity is improved and the rotor 152 can be reliably fixed to the main shaft 136.
また、本実施の形態のようにこの密閉型圧縮機をインバータ回路により複数の回転数で駆動すると、低回転数域から高回転数域まで信頼性の高い運転が可能な高耐久型の密閉型圧縮機とすることができる。すなわち、低回転数運転においては、冷媒圧縮時に発生するトルク変動により、シャフトと回転子の間に回転方向の力がかかる。しかし、回転子１５２が鋼製の筒１６６を介してシャフト１２６に強固に固定されているので、トルク変動が大きい低回転数運転においても回転子１５２がずれるといったことがない。また、高回転数運転においては、回転子に大きな遠心力が働くが、このような大きな遠心力が働いても回転子がシャフトからずれることを防止できる。このようなことから密閉型圧縮機の耐久性を向上させ、信頼性を高めることができる。
In addition, when this hermetic compressor is driven at a plurality of revolutions by an inverter circuit as in this embodiment, a highly durable hermetically sealed type capable of reliable operation from a low revolution speed range to a high revolution speed range. It can be a compressor. That is, in low-speed operation, a torque in the rotational direction is applied between the shaft and the rotor due to torque fluctuations that occur during refrigerant compression. However, since the rotor 152 is firmly fixed to the shaft 126 via the steel cylinder 166, the rotor 152 does not shift even in low-speed operation with large torque fluctuation. Further, in high speed operation, a large centrifugal force acts on the rotor, but even if such a large centrifugal force acts, the rotor can be prevented from shifting from the shaft. Therefore, the durability of the hermetic compressor can be improved and the reliability can be improved.
（実施の形態２）
図３は、実施の形態１で説明した密閉型圧縮機を搭載した冷凍装置の構成を示す模式図である。ここでは、冷凍装置の基本構成の概略について説明する。 (Embodiment 2)
FIG. 3 is a schematic diagram showing a configuration of a refrigeration apparatus equipped with the hermetic compressor described in the first embodiment. Here, an outline of the basic configuration of the refrigeration apparatus will be described.
図３は、実施の形態１で説明した密閉型圧縮機を搭載した冷凍装置の構成を示す模式図である。ここでは、冷凍装置の基本構成の概略について説明する。 (Embodiment 2)
FIG. 3 is a schematic diagram showing a configuration of a refrigeration apparatus equipped with the hermetic compressor described in the first embodiment. Here, an outline of the basic configuration of the refrigeration apparatus will be described.
図３において、冷凍装置は、一面が開口した断熱性の箱体とその開口を開閉する扉体構成の本体３０１と、本体３０１の内部を、物品の貯蔵空間３０２と機械室３０３に区画する区画壁３０４と、貯蔵空間３０２内を冷却する冷媒回路３０５を具備している。
In FIG. 3, the refrigeration apparatus includes a heat-insulating box having an opening on one side, a main body 301 having a door structure that opens and closes the opening, and a compartment that divides the interior of the main body 301 into an article storage space 302 and a machine room 303. A wall 304 and a refrigerant circuit 305 for cooling the inside of the storage space 302 are provided.
冷媒回路３０５は、圧縮機３０６として実施の形態１で説明した密閉型圧縮機と、放熱器３０７と、減圧装置３０８と、吸熱器３０９とを環状に配管接続した構成となっている。そして、吸熱器３０９は、送風機（図示せず）を具備した貯蔵空間３０２内に配置されている。吸熱器３０９の冷却熱は、矢印で示すように、送風機によって貯蔵空間３０２内を循環するように撹拌され、貯蔵空間３０２内は冷却される。
The refrigerant circuit 305 has a configuration in which the hermetic compressor described in Embodiment 1 as the compressor 306, the radiator 307, the decompression device 308, and the heat absorber 309 are connected in a ring shape. And the heat absorber 309 is arrange | positioned in the storage space 302 which comprised the air blower (not shown). The cooling heat of the heat absorber 309 is agitated so as to circulate in the storage space 302 by a blower, as indicated by an arrow, and the storage space 302 is cooled.
以上説明したようにこの冷凍装置は、圧縮機３０６として本発明の実施の形態１で説明した密閉型圧縮機を搭載しており、この密閉型圧縮機がアウターロータ型モータの回転子１５２を鋼製の筒１６６を介して主軸１３６に固定して耐久性を向上させているので、耐久性を向上することができる。
As described above, this refrigeration apparatus is equipped with the hermetic compressor described in the first embodiment of the present invention as the compressor 306, and this hermetic compressor replaces the rotor 152 of the outer rotor type motor with the steel. Since the durability is improved by being fixed to the main shaft 136 via the made cylinder 166, the durability can be improved.
以上のように、本発明にかかる密閉型圧縮機および冷凍装置は、密閉型圧縮機の耐久性を向上することができるので、電気冷蔵庫、あるいはエアーコンディショナー等の家庭用に限らず、業務用ショーケース、自動販売機等の冷凍装置に広く適用することができる。
As described above, since the hermetic compressor and the refrigeration apparatus according to the present invention can improve the durability of the hermetic compressor, it is not limited to household use such as an electric refrigerator or an air conditioner. It can be widely applied to refrigeration devices such as cases and vending machines.
１０２ 密閉容器
１０４ 電動要素
１０６ 圧縮要素
１２６ シャフト
１２８ シリンダブロック
１３０ ピストン
１３２ 連結手段
１３４ 偏心軸
１３６ 主軸
１４２ シリンダ
１４４ 軸受
１５０ 固定子
１５２ 回転子
１６６ 筒
１６８ 鍔
３０５ 冷媒回路
３０６ 圧縮機
３０７ 放熱器
３０８ 減圧装置
３０９ 吸熱器 DESCRIPTION OFSYMBOLS 102 Sealing container 104 Electric element 106 Compression element 126 Shaft 128 Cylinder block 130 Piston 132 Connection means 134 Eccentric shaft 136 Main shaft 142 Cylinder 144 Bearing 150 Stator 152 Rotor 166 Cylinder 168 鍔 305 Refrigerant circuit 306 Compressor 307 Radiator 308 Pressure reducing device 309 Heat absorber
１０４ 電動要素
１０６ 圧縮要素
１２６ シャフト
１２８ シリンダブロック
１３０ ピストン
１３２ 連結手段
１３４ 偏心軸
１３６ 主軸
１４２ シリンダ
１４４ 軸受
１５０ 固定子
１５２ 回転子
１６６ 筒
１６８ 鍔
３０５ 冷媒回路
３０６ 圧縮機
３０７ 放熱器
３０８ 減圧装置
３０９ 吸熱器 DESCRIPTION OF
Claims (7)
- 密閉容器内に、電動要素と、前記電動要素によって駆動される圧縮要素を収容し、
前記圧縮要素は、主軸と偏心軸とから構成されるシャフトと、前記シャフトの主軸を軸支する軸受とシリンダとを有するシリンダブロックと、前記シリンダ内で往復運動するピストンと、前記偏心軸と前記ピストンとを連結する連結手段とを備え、
前記電動要素は、固定子と前記固定子の外周を囲むように前記固定子と同軸で配置された回転子とを備えたアウターロータ型モータとし、かつ前記シャフトには鋼製の筒を固定し、前記鋼製の筒に前記回転子を溶接固定した
密閉型圧縮機。 In an airtight container, an electric element and a compression element driven by the electric element are accommodated,
The compression element includes a shaft composed of a main shaft and an eccentric shaft, a cylinder block having a bearing and a cylinder for supporting the main shaft of the shaft, a piston reciprocating in the cylinder, the eccentric shaft, and the A connecting means for connecting the piston,
The electric element is an outer rotor type motor including a stator and a rotor arranged coaxially with the stator so as to surround an outer periphery of the stator, and a steel cylinder is fixed to the shaft. A hermetic compressor in which the rotor is welded and fixed to the steel cylinder. - 前記鋼製の筒を前記シャフトに焼嵌めで固定した請求項１に記載の密閉型圧縮機。 The hermetic compressor according to claim 1, wherein the steel cylinder is fixed to the shaft by shrink fitting.
- 前記鋼製の筒を前記シャフトに圧入で固定した請求項１に記載の密閉型圧縮機。 The hermetic compressor according to claim 1, wherein the steel cylinder is fixed to the shaft by press-fitting.
- 前記鋼製の筒を前記シャフトに接着剤で固定した請求項１に記載の密閉型圧縮機。 The hermetic compressor according to claim 1, wherein the steel cylinder is fixed to the shaft with an adhesive.
- 前記鋼製の筒の偏心軸側の端に鍔をつけた請求項１から４のいずれか一項に記載の密閉型圧縮機。 The hermetic compressor according to any one of claims 1 to 4, wherein a flange is attached to an end of the steel tube on an eccentric shaft side.
- 前記電動要素がインバータ回路により複数の回転数で駆動されることを特徴とする請求項１から５のいずれか一項に記載の密閉型圧縮機。 The hermetic compressor according to any one of claims 1 to 5, wherein the electric element is driven by an inverter circuit at a plurality of rotation speeds.
- 請求項１から６のいずれか一項に記載の密閉型圧縮機を用いた冷凍装置。
A refrigeration apparatus using the hermetic compressor according to any one of claims 1 to 6.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017092100A JP2020112032A (en) | 2017-05-08 | 2017-05-08 | Hermetic compressor and refrigerator using the same |
| JP2017-092100 | 2017-05-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2018207737A1 true WO2018207737A1 (en) | 2018-11-15 |
Family
ID=64102728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2018/017652 WO2018207737A1 (en) | 2017-05-08 | 2018-05-07 | Closed compressor and refrigeration device using same |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2020112032A (en) |
| WO (1) | WO2018207737A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11437900B2 (en) | 2019-12-19 | 2022-09-06 | Black & Decker Inc. | Modular outer-rotor brushless motor for a power tool |
| US11757330B2 (en) | 2019-12-19 | 2023-09-12 | Black & Decker, Inc. | Canned outer-rotor brushless motor for a power tool |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6011637U (en) * | 1983-07-01 | 1985-01-26 | 三菱電機株式会社 | rotor for generator |
| JPS61214736A (en) * | 1985-03-20 | 1986-09-24 | Hitachi Ltd | Sealed compressor |
| JPS63148842A (en) * | 1986-12-11 | 1988-06-21 | Sankyo Seiki Mfg Co Ltd | Fixing mechanism for shaft |
| JP2002343016A (en) * | 2001-05-18 | 2002-11-29 | Tokyo Parts Ind Co Ltd | Spindle motor having turntable section and method of manufacturing for the same |
| JP2003049774A (en) * | 2001-08-06 | 2003-02-21 | Hitachi Ltd | Hermetic electric compressor and refrigerating/air- conditioning device |
| JP2005155438A (en) * | 2003-11-26 | 2005-06-16 | Matsushita Electric Ind Co Ltd | Hermetic compressor |
| WO2016006229A1 (en) * | 2014-07-07 | 2016-01-14 | パナソニックＩｐマネジメント株式会社 | Sealed compressor and refrigeration device using the same |
-
2017
- 2017-05-08 JP JP2017092100A patent/JP2020112032A/en active Pending
-
2018
- 2018-05-07 WO PCT/JP2018/017652 patent/WO2018207737A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6011637U (en) * | 1983-07-01 | 1985-01-26 | 三菱電機株式会社 | rotor for generator |
| JPS61214736A (en) * | 1985-03-20 | 1986-09-24 | Hitachi Ltd | Sealed compressor |
| JPS63148842A (en) * | 1986-12-11 | 1988-06-21 | Sankyo Seiki Mfg Co Ltd | Fixing mechanism for shaft |
| JP2002343016A (en) * | 2001-05-18 | 2002-11-29 | Tokyo Parts Ind Co Ltd | Spindle motor having turntable section and method of manufacturing for the same |
| JP2003049774A (en) * | 2001-08-06 | 2003-02-21 | Hitachi Ltd | Hermetic electric compressor and refrigerating/air- conditioning device |
| JP2005155438A (en) * | 2003-11-26 | 2005-06-16 | Matsushita Electric Ind Co Ltd | Hermetic compressor |
| WO2016006229A1 (en) * | 2014-07-07 | 2016-01-14 | パナソニックＩｐマネジメント株式会社 | Sealed compressor and refrigeration device using the same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11437900B2 (en) | 2019-12-19 | 2022-09-06 | Black & Decker Inc. | Modular outer-rotor brushless motor for a power tool |
| US11757330B2 (en) | 2019-12-19 | 2023-09-12 | Black & Decker, Inc. | Canned outer-rotor brushless motor for a power tool |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2020112032A (en) | 2020-07-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6214821B2 (en) | Hermetic compressor and refrigeration system | |
| JP6585588B2 (en) | Hermetic compressor and refrigeration system | |
| WO2018207737A1 (en) | Closed compressor and refrigeration device using same | |
| WO2016006229A1 (en) | Sealed compressor and refrigeration device using the same | |
| CN106979138B (en) | Hermetic refrigerant compressor and refrigeration device | |
| US11473571B2 (en) | Sealed refrigerant compressor and refrigeration device | |
| CN111480004B (en) | Compressor | |
| WO2017213134A1 (en) | Electric motor, hermetically sealed electric compressor using same, and refrigeration device | |
| JP4513633B2 (en) | Compressor | |
| JP4774821B2 (en) | Compressor | |
| JP2020148109A (en) | Compressor and apparatus with compressor | |
| JP6598881B2 (en) | Scroll compressor | |
| CN102562527A (en) | Refrigerant compressor | |
| WO2020085427A1 (en) | Sealed compressor and refrigeration device | |
| JP2020165308A (en) | Hermetic electric compressor and refrigeration device using the same | |
| JP2020094558A (en) | Hermetic type compressor and freezer | |
| JP2006144730A (en) | Reciprocating refrigerant compressor | |
| JP2016021837A (en) | Motor and compressor | |
| JP2006283695A (en) | Compressor | |
| JP2019138269A (en) | Hermetic type compressor and refrigeration device | |
| JP2020094559A (en) | Hermetic type compressor and freezer | |
| JP2010242565A (en) | Hermetic compressor and refrigerator having the same | |
| JP2013181516A (en) | Scroll compressor | |
| JP2019074067A (en) | Hermetic electric compressor | |
| JP2002147355A (en) | Hermetic motor compressor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 18797728 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 18797728 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: JP |