CN1022126C - Sealed compressor driven by electric-motor - Google Patents
Sealed compressor driven by electric-motor Download PDFInfo
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- CN1022126C CN1022126C CN91102342A CN91102342A CN1022126C CN 1022126 C CN1022126 C CN 1022126C CN 91102342 A CN91102342 A CN 91102342A CN 91102342 A CN91102342 A CN 91102342A CN 1022126 C CN1022126 C CN 1022126C
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- 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
- F04B39/02—Lubrication
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Abstract
To prevent refrigerating machine oil from entering the space around the outer periphery of a rotary shaft so as to eliminate the intermittent sounds of oil drops harmful to the sense of hearing which are generated during operation of a conventional compressor and realize a compressor with low noise by mounting an annular member on the outer periphery of the end of the rotary shaft located below the surface of refrigerating machine oil, and in a position distant from the end of the rotary shaft by predetermined length. When a crankshaft 3 is rotated the swelling portion 4d of refrigerating machine oil 4 is formed by the rotary centrifugal force of an annular ring 5 fixed to the end portion 3b of the crankshaft and frictional forces generated between the outer peripheral portion of the annular ring 5 and the refrigerating machine oil 4. Since the rising portion 4c of the wave of the refrigerating machine oil which is generated around the outer periphery of the end portion 3b of the crankshaft is separated from the outer periphery of the end portion 3b of the crankshaft by a distance equal to the length of the annular ring 5, the distance between the swelling portion 4d of the refrigerating machine oil and the outer peripheral portion of the crankshaft 3 is increased so much as to make it possible to prevent the refrigerating machine oil from entering the space around the outer peripheral portion of the crankshaft 3.
Description
The present invention relates to sealed compressor driven by electric-motor, more particularly, the compressor that the present invention relates to reduce sound and undisturbedly work, said sound are collided by the coolant compressor that uses in the household electric refrigerator for example store oil pasta in lubricant oil oil droplet and the compressor when the operation and produce.
The compressor of existing above-mentioned form at first is described referring to Figure 14.Sealed compressor driven by electric-motor comprises: store in the bottom in the superjacent air space of seal container 5, store oil 7 in this container of lubricant oil 7, the motor 3 that is supported from the inner elastomeric of this container 5 by resilient supporting unit (spring) 4, be arranged on the compressing mechanism 1 in these electronic 3 superjacent air spaces and drive the bent axle 6 that links this compressing mechanism 1 and the Vertical direction of above-mentioned motor 3.In this bent axle 6, form axial fuel feeding path 6a, be provided with the known centrifugal oil feed pump 7a that is immersed in the above-mentioned store oil 7 in addition in the bottom of this bent axle.Compressing mechanism 1 has cylinder mechanism 2, the piston of this cylinder mechanism is back and forth driven by bent axle 6 according to the rotation of motor, thereby be compressed the suction of gas (for example refrigerant gas), compression and spuing, by the gas that spued by be located in the container 5 tap hole (not shown) and by the outside of row to container 5.
In the action of the such compressor of structure, be stored in the lubricant oil of container 5 bottoms along with the rotation of bent axle 6, utilize the effect of above-mentioned centrifugal oil feed pump 7a lubricant oil to be delivered among the above-mentioned fuel feeding path 6a from this store oil 7.Lubricant oil among the fuel feeding path 6a rises in path 6a, and wherein a part is sent to each sliding parts of compressing mechanism 1 and carries out the lubricated and cooling of these sliding partss; Remaining lubricant oil disperses from the upper end open of bent axle 6, and the part of the oil that disperses like this drops on compressing mechanism 1 and the motor 3, and the one side cooling of carrying out compressing mechanism 1 and motor 3 simultaneously turns back to store oil 7 places of container 5 bottoms.In addition, other parts of the oil that disperses are sprinkling upon the inboard of container 5, and their one sides and the wall of container 5 carry out that heat exchange and cooling one side are wandered and store oil 7 places that turn back to the bottom.The lubricant oil that returns store oil 7 places is like this sucted by pump 7a once more and carries out above-mentioned lubricating repeatedly reaches cooling.
The sealed compressor driven by electric-motor of above-mentioned form for example is disclosed in that Japan Patent is real to be opened in the clear 53-107308 communique.
In recent years, the trend that personal refrigerator is set in the bedroom or in the living room is arranged, for the sealed compressor driven by electric-motor that uses in such household electric refrigerator, because its purposes, so ad hoc requirement have very high quietization degree.Thereby, in order to seek to reduce the operation noise, taked to reduce the pulsation sound of refrigerant gas, reduce all means such as vibration transfer of support system and piping system.
Yet, in above-mentioned prior art, the sound that does not have consideration when compressor operating, to produce by the collision between the pasta of lubricant oil oil droplet and store oil 7.This sound is hidden in than higher existing coolant compressor in other noises and inconspicuous at the operation noise, but this sound becomes very noticeable and the user of refrigerator produced and is an unpleasant jar to nerves in moving the lower coolant compressor of noise in recent years.
The phenomenon of colliding between lubricant oil oil droplet and the store oil pasta can be divided into two kinds.Collision and formed concave surface fiercely between oil droplet that falls from motor stator when wherein first kind of phenomenon is compressor operation and store oil pasta at pasta.To describe referring to Figure 15 below about this phenomenon.
This figure illustrates besel is located on the seal container of existing seal container shape motor compressor, can be observed the situation that the lubricant oil oil droplet falls from motor stator when this compressor operating like this.
As shown in figure 15, be sprinkling upon the lubricant oil on compressing mechanism (not shown) and the motor 3 etc. because its surface tension is not to drip but flow downward and move into the lower end surface 3b of stator 3a iron core along the wall of motor 3 on the way, after growing into, drop on the pasta of store oil 7 of seal container 5 bottoms attached to oil droplet very big on this end face.
At this moment, found to cause the production process of sound under the oil droplet of glouglou voltage crest intermittently as shown in figure 16.Produce this sound former because when the pasta of oil droplet and store oil 7 collides fiercely, formed concave surface at pasta, near the oil this concave surface is protruding next as shown in figure 15 simultaneously, then the oil of this projection is advanced by leaps and bounds to the center of this concave surface, run foul of each other as the high wave on the sea, produced the sound that breaks after the collision.
The size at the sound peak of this sound and the size of oil droplet and the proportional relation of height (distance) that oil droplet falls.Yet, be unsatisfactory with the scheme that increases pasta and reduce the distance that oil droplet falls with increasing the lubricants capacity be stored in the seal container bottom.So why? this is because when compressor stops, refrigeration agent in the freeze cycle dissolves in the lubricant oil, consequently the pasta of lubricant oil 7 rises and has reached the rotor of motor, in case compressor turns round in this state, lubricant oil will enter in the air gap of motor, will cause the abnormal vibrations of compressor like this.
Then, second kind of phenomenon about lubricant oil oil droplet and the collision of store oil pasta will illustrate referring to Figure 17 and Figure 18.Above-mentioned centrifugal oil feed pump 7a has the conical external surface 7a-1 of the band tapering of downward contraction.Because this conical external surface 7a-1 is immersed in the store oil 7, when compressor operation because the frictional force between this conical external surface 7a-1 and the store oil 7, formed the lubricant oil part R that upwards rises along this outer surface 7a-1, around this outer surface 7a-1, also form the whirlpool W of lubricant oil in addition, around conical external surface 7a-1, formed protruding part as shown in figure 17 in the lubricant oil store oil 7.As mentioned above because motor 3 and compressing mechanism 1 are flexibly to support by spring 4, bent axle 6 vibrates when compressor operation, because this vibration, the shape of the convex portion of the whirlpool W of lubricant oil will change as shown in Figure 18 and contact with the conical external surface 7a-1 of centrifugal oil feed pump 7a.This moment whirlpool W the lubricant oil of convex portion because oil droplet is dispersed in the rotation of bent axle, and this oil droplet that disperses drops on downwards on the pasta of lubricant oil 7, referring to Figure 15 and Figure 16 because the same reason that had illustrated produces the sound that breaks.This sound that breaks is interrupted, especially is unusual sashimis when night peace and quiet.
In view of the above problems, the object of the present invention is to provide a kind of sealed compressor driven by electric-motor, wherein be provided with the means that can effectively prevent the sound that when compressor operation, produces by the collision between oil droplet and the store oil pasta, it need not carry out significantly structure modify to compressor, and processes and assemble easily.
In first embodiment of the present invention, between above-mentioned compressor structure and above-mentioned store oil, be provided with above-mentioned motor, the means that reduce tut are to prevent when compressor operating, and oil droplet is directly fallen on the above-mentioned store oil pasta from the stator core of above-mentioned motor and collided with pasta.This embodiment is for providing solution referring to Figure 15 and the illustrated problem of Figure 16.
In second embodiment of the present invention, above-mentioned centrifugal oil feed pump has the conical external surface of the band tapering of downward contraction, reduces the isolating means of means for the internal surface of the store oil whirlpool that produces around this conical external surface when compressor operation is outwards separated from this conical external surface of tut.This embodiment is for providing solution referring to Figure 17 and the illustrated problem of Figure 18.
According to sealed compressor driven by electric-motor of the present invention, it has the seal container of storing lubricant oil in the bottom, be arranged on motor and compressing mechanism in the store oil superjacent air space of this container, drive the bent axle of the Vertical direction that links this compressing mechanism and above-mentioned motor, in this bent axle, be formed with the fuel feeding path, in addition, be provided with the centrifugal oil feed pump that is immersed in the above-mentioned store oil in the underpart of this bent axle, utilize the rotation of this bent axle that lubricant oil is delivered in the above-mentioned fuel feeding path from this store oil, also be provided with the means of the sound that when compressor operating, reduces the collision between oil droplet and the store oil pasta and produce, above-mentioned motor is arranged between above-mentioned compressor structure and the above-mentioned store oil, the means that reduce tut are by preventing that the stator core from above-mentioned motor of when compressor operating oil droplet from directly dropping in the above-mentioned store oil and constituted with means that this pasta collides, it is characterized in that, the above-mentioned collision means that prevent are that plate shape oil guide element below a stator core that is installed in above-mentioned motor constitutes, this oil guide element has the outward edge bigger than the outer ring of said stator iron core, be provided with jut in this outer edge, be provided with along the downward part of extending of outer surface of the end coil of said stator at the inner ring place of this oil guide element, the part of above-mentioned downward extension contacts with the outer surface of above-mentioned end coil, perhaps outwards leaves from this outer surface.
According to sealed compressor driven by electric-motor of the present invention, it has the seal container of storing lubricant oil in the bottom, be arranged on motor and compressing mechanism in the store oil superjacent air space of this container, drive the bent axle of the Vertical direction that links this compressing mechanism and above-mentioned motor, in this bent axle, be formed with the fuel feeding path, in addition, be provided with the centrifugal oil feed pump that is immersed in the above-mentioned store oil in the underpart of this bent axle, utilize the rotation of this bent axle that lubricant oil is delivered in the above-mentioned fuel feeding path from this store oil, also be provided with the means of the sound that when compressor operating, reduces the collision between oil droplet and the store oil pasta and produce, above-mentioned motor is arranged between above-mentioned compressor structure and the above-mentioned store oil, the means that reduce tut are by preventing that the stator core from above-mentioned motor of when compressor operating oil droplet from directly dropping in the above-mentioned store oil and constituted with means that this pasta collides, it is characterized in that, the above-mentioned collision means that prevent are made of an oily guide element with the borehole wall shape part on the outer surface that is installed in above-mentioned motor stator end coil, and this oil guide element has the incline section with the consecutive fan out in lower end partly of above-mentioned borehole wall shape.
According to sealed compressor driven by electric-motor of the present invention, it has the seal container of storing lubricant oil in the bottom, be arranged on motor and compressing mechanism in the store oil superjacent air space of this container, drive the bent axle of the Vertical direction that links this compressing mechanism and above-mentioned motor, in this bent axle, be formed with the fuel feeding path, in addition, be provided with the centrifugal oil feed pump that is immersed in the above-mentioned store oil in the underpart of this bent axle, utilize the rotation of this bent axle that lubricant oil is delivered in the above-mentioned fuel feeding path from this store oil, also be provided with the means of the sound that when compressor operating, reduces the collision between oil droplet and the store oil pasta and produce, above-mentioned motor is arranged between above-mentioned compressor structure and the above-mentioned store oil, the means that reduce tut are by preventing that the stator core from above-mentioned motor of when compressor operating oil droplet from directly dropping in the above-mentioned store oil and constituted with means that this pasta collides, it is characterized in that the above-mentioned collision means that prevent are made of the oily guide element that the circular disk on a stator end coil that is fixed on above-mentioned motor following constitutes.
According to sealed compressor driven by electric-motor of the present invention, it has the seal container of storing lubricant oil in the bottom, be arranged on motor and compressing mechanism in the store oil superjacent air space of this container, drive the bent axle of the Vertical direction that links this compressing mechanism and above-mentioned motor, in this bent axle, be formed with the fuel feeding path, in addition, be provided with the centrifugal oil feed pump that is immersed in the above-mentioned store oil in the underpart of this bent axle, utilize the rotation of this bent axle that lubricant oil is delivered in the above-mentioned fuel feeding path from this store oil, also be provided with the means of the sound that when compressor operating, reduces the collision between oil droplet and the store oil pasta and produce, above-mentioned motor is arranged between above-mentioned compressor structure and the above-mentioned store oil, the means that reduce tut are by preventing that the stator core from above-mentioned motor of when compressor operating oil droplet from directly dropping in the above-mentioned store oil and constituted with means that this pasta collides, it is characterized in that, the above-mentioned collision means that prevent are made of an oily guide element with plane of inclination, and extend to the outer surface of the stator end coil of this motor from the outer edge of the lower end surface of above-mentioned motor stator-core this plane of inclination.
According to sealed compressor driven by electric-motor of the present invention, it has the seal container of storing lubricant oil in the bottom, be arranged on motor and compressing mechanism in the store oil superjacent air space of this container, drive the bent axle of the Vertical direction that links this compressing mechanism and above-mentioned motor, in this bent axle, be formed with the fuel feeding path, in addition, be provided with the centrifugal oil feed pump that is immersed in the above-mentioned store oil in the underpart of this bent axle, utilize the rotation of this bent axle that lubricant oil is delivered in the above-mentioned fuel feeding path from this store oil, also be provided with the means of the sound that when compressor operating, reduces the collision between oil droplet and the store oil pasta and produce, above-mentioned motor is arranged between above-mentioned compressor structure and the above-mentioned store oil, the means that reduce tut are by preventing that the stator core from above-mentioned motor of when compressor operating oil droplet from directly dropping in the above-mentioned store oil and constituted with means that this pasta collides, it is characterized in that, above-mentioned prevent the collision means be one by anti-refrigeration agent, the oily guide element that the oil resistance resin material is made.
The sealed compressor driven by electric-motor according to the present invention, it has the seal container of storing lubricant oil in the bottom, be arranged on motor and compressing mechanism in the store oil superjacent air space of this container, drive the bent axle of the Vertical direction that links this compressing mechanism and above-mentioned motor, in this bent axle, be formed with the fuel feeding path, in addition, be provided with the centrifugal oil feed pump that is immersed in the above-mentioned store oil in the underpart of this bent axle, utilize the rotation of this bent axle that lubricant oil is delivered in the above-mentioned fuel feeding path from this store oil, also be provided with the means of the sound that when compressor operating, reduces the collision between oil droplet and the store oil pasta and produce, above-mentioned motor is arranged between above-mentioned compressor structure and the above-mentioned store oil, the means that reduce tut are by preventing that the stator core from above-mentioned motor of when compressor operating oil droplet from directly dropping in the above-mentioned store oil and constituted with means that this pasta collides, it is characterized in that the above-mentioned collision means that prevent are made of the floatability granular solids on the pasta that is placed in above-mentioned store oil.
According to sealed compressor driven by electric-motor of the present invention, it has the seal container of storing lubricant oil in the bottom, be arranged on motor and compressing mechanism in the store oil superjacent air space of this container, drive the bent axle of the Vertical direction that links this compressing mechanism and above-mentioned motor, in this bent axle, be formed with the fuel feeding path, in addition, be provided with the centrifugal oil feed pump that is immersed in the above-mentioned store oil in the underpart of this bent axle, utilize the rotation of this bent axle that lubricant oil is delivered in the above-mentioned fuel feeding path from this store oil, also be provided with the means of the sound that when compressor operating, reduces the collision between oil droplet and the store oil pasta and produce, above-mentioned motor is arranged between above-mentioned compressor structure and the above-mentioned store oil, the means that reduce tut are by preventing that the stator core from above-mentioned motor of when compressor operating oil droplet from directly dropping in the above-mentioned store oil and constituted with means that this pasta collides, it is characterized in that the above-mentioned collision means that prevent are made of the porosity plate shape parts that are placed on the above-mentioned store oil pasta.
According to sealed compressor driven by electric-motor of the present invention, it has the seal container of storing lubricant oil in the bottom, be arranged on motor and compressing mechanism in the store oil superjacent air space of this container, drive the bent axle of the Vertical direction that links this compressing mechanism and above-mentioned motor, in this bent axle, be formed with the fuel feeding path, in addition, be provided with the centrifugal oil feed pump that is immersed in the above-mentioned store oil in the underpart of this bent axle, utilize the rotation of this bent axle that lubricant oil is delivered in the above-mentioned fuel feeding path from this store oil, also be provided with the means of the sound that when compressor operating, reduces the collision between oil droplet and the store oil pasta and produce, it is characterized in that, above-mentioned centrifugal oil feed pump has the outer surface of downward contraction, the means of above-mentioned minimizing sound are made of the whirlpool isolating means, and this whirlpool isolating means makes the internal surface of the store oil whirlpool that produces around this outer surface during compressor operating outwards far go from this outer surface.
Explain first and second embodiment of the present invention below with reference to accompanying drawings.
Fig. 1 is first embodiment's of a sealed compressor driven by electric-motor of the present invention profile diagram.
Fig. 2 is mounted in the ground plan that the oily guide plate on as shown in Figure 1 the motor is seen from the below.
Fig. 3 is the oblique drawing of oily guide plate
Fig. 4 is the amplification profile diagram of the part in as shown in Figure 1 the compressor, and it illustrates the oily guiding function of oily guide plate.
Fig. 5 has represented the noise level test result of first embodiment's of the present invention compressor, has represented that also oily guide plate prevents the effect of sound under the oil droplet.
Fig. 6 and Fig. 7 are the corresponding ground plan and the oblique drawings of first modified example of oily guide plate.
Fig. 8 to Figure 13 is the view that is similar to Fig. 4, and they have represented corresponding second to the 7th modified example of oily guide plate.
Figure 14 is the view that is similar to Fig. 1, and it is the profile diagram of existing sealed compressor driven by electric-motor.
Figure 15 has represented the situation under the oil droplet in the existing compressor shown in Figure 14.
Figure 16 is the view that is similar to Fig. 5, and it has represented the noise level test result that produced under the oil droplet in existing compressor as shown in figure 14.
Figure 17 is the amplification profile diagram that is similar to the part in the sealed compressor driven by electric-motor before of existing compressor as shown in figure 14, and it has represented to take place the situation of whirlpool in store oil around the underpart of bent axle.
Figure 18 is the view that is similar to Figure 17, and it has been represented because the situation that the vibration whirlpool of bent axle scatters and oil disperses everywhere.
Figure 19 is the view that is similar to Figure 17, it is the amplification profile diagram of the part in the sealed compressor driven by electric-motor of second embodiment of the invention, it has represented that the outer surface of bent axle underpart installed the state of annular element, this annular element is the whirlpool isolating means, be used for preventing forming oil the contacting between whirlpool and the bent axle of reason of dispersing.
Figure 20 is the ground plan from its below perspective bent axle as shown in figure 19.
Figure 21 is the view that is similar to Figure 20, and it has represented first modified example of Figure 19 and embodiment shown in Figure 20.
Figure 22 to Figure 25 is second amplification profile diagram to the bent axle underpart of the 5th modified example according to embodiment shown in Figure 19.
Sealed compressor driven by electric-motor as shown in Figure 1 is used as the coolant compressor of household electric refrigerator, in the constituting component of this compressor and the same or equal parts of the constituting component of existing compressor shown in Figure 14 represent with same reference symbol.The i.e. vertical substantially bent axle 6 of piston 2a that has seal container 5, in this container 5, be arranged on motor 3 in the superjacent air space of bottom store oil 7, be arranged on above this motor 3 and have the compressing mechanism 1 of cylinder mechanism 2 and drive to link the cylinder mechanism 2 of the rotor 3-1 of motor 3 and compressing mechanism 1 of sealed compressor driven by electric-motor as shown in Figure 1.Bent axle 6 below run through the rotor 3-1 that extends through motor 3, have the tapering of downward contraction in its underpart and form conically, thereby constituted centrifugal oil feed pump 7a.This oil feed pump 7a equally upwards inhales lubricant oil from store oil with existing compressor and sends fuel feeding path 6a in the bent axle 6 to.In illustrated embodiment, motor 3 in the container 5 by several collapse coil springs 4 supported top that makes its stator end coil 3C be positioned at store oil 7 pastas, and with pasta some distances of being separated by.Structure discussed above is identical with compressor structure shown in Figure 14 with action with action.Institute's difference is to have installed at 3b place, the lower end surface of stator core 3a to prevent the oily guide plate 8 that collides.To be described below about this point.
Referring to Fig. 1 to Fig. 3, the outer ring of oily guide plate 8 is bigger than the outer ring of stator core 3a, has formed the jut 8a that upwards turns up from horizontal plane on its outward edge; On the other hand, the inner ring of oil guide plate 8 is littler than the external diameter of stator end coil 3C, and when installing and the outer surface of stator end coil 3C contact, formed several ligule boards 8b within it on the periphery, under the state that oily guide plate 8 is mounted, these ligule boards 8b is contacted with the outer surface with end coil 3C and extension downwards by bending downwards from horizontal plane.
This oil guide plate 8 is by being formed compacting of the resinous wood flitch of anti-refrigeration agent of rubber-like and oil resistance or heating.
Utilization is assemblied in the coil spring of resilient supporting unit 4 and the motor fixing bolt between the 3b of stator core lower end surface, and this oil guide plate 8 is installed on the motor 3.Promptly in Fig. 2 and embodiment shown in Figure 3, the peripheral part of the slightly semicircular breach 8C on four angles that are located at oily guide plate 8 is pressed from both sides between the head of the underpart 3b of into stator core and fixing bolt 11.
The following describes the effect of sealed compressor driven by electric-motor with above structure.
The rotation that the store oil 7 of seal container 5 bottoms is accompanied by bent axle 6 is risen by acting in the fuel feeding path 6a in the bent axle 6 of oil feed pump 7a, a part is wherein carried out the lubricated and cooling of compressing mechanism 1 each sliding parts, and other parts are dispersed towards periphery from the upper end of bent axle 6 and are sprinkling upon on compressing mechanism 1 and the motor 3.
Spread lubricant oil down because its surface tension is not to drip but flow downward along the surface of compressing mechanism 1 and motor 3 on the way, it moves into the lower end surface 3b of stator core and change from the outer surface of stator core 3a shown in arrow among Fig. 4 becomes oil droplet greatly and drops in downwards on the internal surface of oily guide plate 8 then.Because the outer ring of oily guide plate 8 is bigger than the outer ring of stator core 3a, thereby be to drop on this plate 8 really from the oil that the outer edge of lower end surface 3b unshakable in one's determination is directly dripped.In addition because the outward edge of this plate 8 has the jut 8a that is bent upwards from horizontal plane, not arrive so the oil on the plate 8 can not surpass the plate outward edge plate 8 below.
In addition, being arranged on several ligule board 8b on the inward flange of oily guide plate 8 and the outer surface of end coil 3C joins, and stick up archwise because of the elastic force of plate 8, because oily guide plate 8 is downward-sloping slightly to inward flange from outward edge, thereby the oil that drops in downwards on this plate is directed to end coil 3C.The oil that is directed to end coil 3C turns back to lubricant oil store oil 7 places of container 5 bottoms along coiling.
In addition, though at the stator bolt assembly department of oily guide plate 8, promptly the outside of notch part 8C as shown in Figure 3 is not provided with jut 8a, even oil flows down from guide plate by this part, owing to being that coil spring flows down along resilient supporting unit, the place can directly not drop on the pasta.
Thereby prevented that oil droplet from directly dropping on the pasta of store oil 7 from stator core lower end surface 3b.Its result as shown in Figure 5, in the accompanying drawing of expression noise level test result, do not had the sharp-pointed acoustic pressure peak of the distinctive interruption of sound under the oil droplet and compared in the past auditory perception might as well, realized quietization of running.
Like this, according to present embodiment, moving into stator core lower end surface 3b and become big oil droplet according to lubricated oil surface tension is not directly to drop on the pasta from stator, but be introduced to the very little position of distance of dripping by oily guide plate 8, thereby can prevent the generation of sound under the unpleasant to hear oil droplet, compared in the past, can seek quietization that turns round further.
In addition, because oily guide plate 8 uses rubber-like resinous wood flitch, thereby forms processing easily, in addition when mounted or after installing, owing to can not damage the coiling epithelium of motor, thereby can not damage the reliability of motor.
In addition because oily guide plate 8 utilizes motor fixing bolt 11 to be installed on the motor, thereby its assembling easily, processibility is good, be a kind of cheapness prevent to collide parts.
Fig. 8 has represented second modified example 8A of oily guide plate 8.The outer ring of this oil guide plate 8A is bigger than the outer ring of stator core 3a, and on its outward edge, formed jut 8a, its inner ring is also big and formed from the horizontal plane borehole wall shape 8e of portion of bending downwards, the outside spaced apart certain distance of the outer surface of these borehole wall shape parts and end coil 3C than the outer ring of stator end coil 3C in addition.
Because the lower end of the borehole wall shape parts of oily guide plate 8A is very near from the pasta of store oil 7,8A of oil guide plate utilizes oil surface tension oil mobile along the outer surface of stator core 3a and that move on the 3b of stator core lower end surface to lead near the pasta, so just reduced the distance under the oil droplet.
Thereby, according to modified example shown in Figure 8, also can obtain the effect same to embodiment shown in Figure 7 with Fig. 1.
Fig. 9 has represented the 3rd modified example 8B of oily guide plate 8.Its inner lane of oil guide plate 8B has constituted the borehole wall shape 8f of portion on the outer surface top that is installed in stator end coil 3C, and the rake 8g of fan out continues mutually with the lower end of the part of this borehole wall shape.Rake 8g lower end is positioned near the pasta of store oil 7, thereby oil droplet has been diminished to the distance on the pasta.Thereby, till the oil that moves into stator core lower end surface 3b and become oil droplet is led near the pasta by the uper side surface of tilt component, so can obtain and above-mentioned same effect.
Oily guide plate 8C shown in Figure 10 is the 4th modified example of oily guide plate 8.This oil guide plate 8C is the disk that is roughly ring-type that is fixed on below the stator end coil 3C.Become oil droplet and the oil that drips turns back to store oil 7 near the oily guide plate 8C the pasta that is arranged in store oil 7 at stator core lower end surface 3b.According to this modified example, except can obtain with the same effect of above-mentioned each modified example, it also has and makes simple and the peculiar effect of dog-cheap oily guide element can be provided.
Figure 11 has represented the oily guide element 8D of the 5th modified example of oily guide plate 8.This oil guide element 8D has formed the plane of inclination that an outer surface from the outer edge of stator core lower end surface 3b towards stator end coil 3C extends continuously downwards.According to this structure, the oil that flows along the outer surface of stator core 3a since its surface tension flow along the plane of inclination of oily guide element 8D and be directed to stator end coil 3C, returning bottom in the store oil 7 then from the little stator end coil 3C of distance that drips.According to modified example, can obtain and the same effect of above-mentioned each modified example.
In the embodiment and modified example of above explanation, the oil guide element is installed in lower end surface 3b or the end coil 3c place of motor stator-core 3a, but the present invention is not limited to above-mentioned example, so long as prevent parts being provided with under the oil droplet, just can be prevented the effect of sound under the oil droplet near the pasta place of store oil 7.Below, referring to Figure 12 and Figure 13 this embodiment is described.
Prevent under the oil droplet shown in Figure 12 that parts 8E from making that several are lighter than oil, float on the pasta, is spherical particle shape solid approximately.The oil droplet that drips from stator core lower end surface 3b is met the granular solids 8E that floats on the pasta and is disperseed, and turns back to store oil 7 places of lubricant oil then along these solid surface.Also can obtain and the same effect of above-mentioned each variation according to this embodiment.
Prevent under the oil droplet shown in Figure 13 that parts 8F is arranged on the porous slab shape parts on the pasta.By miniaturization, so oil droplet turns back to store oil 7 places of lubricant oil to the oil droplet that drips from stator core lower end surface 3b after it falls to being disperseed to absorb by the plate shape parts 8F of porous.According to this modified example, can obtain and the same effect of above-mentioned each modified example.
As above at length described, according to the above embodiment of the present invention and modified example, a kind of sealed compressor driven by electric-motor that sound under the cheap oil droplet prevents structure that has can be provided, it need not to compressor carry out structure modify significantly and processing and assembling easily, can not damage the reliability of motor simultaneously.
In addition, in the embodiment of the end coil 3C that oil is guided to motor by oily guide element 8,8D, utilize the cooling action of oil can reduce the temperature of coil, so the double effects of motor 3 efficient that also can be improved.
Below, explain with the embodiment who solves Figure 17 and existing problem shown in Figure 180 referring to Figure 19 to Figure 25.In addition, in Figure 19 to Figure 25 and the same or equal constituting component of the constituting component of Figure 17 and existing compressor shown in Figure 180 with and Figure 17 and Figure 18 in same reference number represent.
The bent axle 6 that inside has axial fuel feeding path 6a axially connects the rotor 3C of motor 3 and extension, has formed centrifugal oil feed pump 7a in its underpart.Bent axle 6 is made of steel pipe, at the centrifugal oil feed pump 7a of its lower end by the steel pipe compression forming is formed.As mentioned above, centrifugal oil feed pump 7a has the conical external surface 7a-1 that shrinks to the lower end of bent axle 6.
Be provided with the standing part 16 that constitutes by annular ditch at conical outer surface 7a-1 place, be fastened on this fixing part office by being pressed into or welding a metal ring 15.This standing part 16 also is positioned at the below of store oil 7 pastas, and is positioned at the position of (through oil hole) the bottom 7a-2 certain distance h that exceeds oil feed pump 7a.During the 7a-2 bottom of oil feed pump 7a is immersed in and is 1 store oil 7 deeply apart from pasta.
According to the machine of compressor, the difference of capacity, the revolution of bent axle is 3000rpm(50 week)～3600rpm(60 week), when the external diameter of bent axle is 18mm, the diameter of metal ring 15 is 1.6mm, the ring external diameter is 15mm.If the soaking depth 1 of oil feed pump 7a is 10～15mm, be 2～5mm then from the lower end 7a-2 of oil feed pump 7a to the size h between the standing part 16.Promptly encircle 15 mounting point and be the following 10mm of the pasta place when static.
The external diameter of establishing ring 15 respectively is D
1, the fuel head position the external diameter of oil feed pump 7a be D
2And the external diameter of the top of oil feed pump 7a (external diameter of bent axle 6) is D
3The time, the size relationship between them is preferably:
D
3≥D
1＞D
2
If the outer diameter D of ring 15
1Excessive, under the low especially operating conditions of oil temperature (after beginning action soon), the oil sound of generation will be very big.
Describe encircling 15 effect below.
During compressor operating, if bent axle 6 rotations, the centrifugal force and the outer surface of above-mentioned ring 15 and the frictional force between the store oil 7 that produce according to the rotation of the ring on the outer surface that is fixed on oil feed pump 7a 15 will produce whirlpool W at the pasta of store oil 7, will form convex portion as shown in figure 19 on pasta.
At this moment, according to present embodiment, the rotation of the relative store oil 7 of oil feed pump 7a and the centrifugal action that produces are named a person for a particular job and are transferred to the outside of ring 15 from pump 7a outer surface 7a-1, so centrifugal force becomes big, thereby also increase to the energy with store oil 7, so the change of the diameter of whirlpool W is big.Therefore, the internal surface of whirlpool W outwards leaves from the conical external surface 7a-1 of pump 7a, thereby whirlpool W can not scatter in the vibration processes of the bent axle 6 of compressor operating.According to this reason, ring 15 can be as the means of isolating whirlpool.
Simultaneously, the part R that upwards rises that produces at the external surface peripheral of the lower end of oil feed pump 7a 7a-2 only leaves away to the outside of ring 15 parts from the outer surface of the underpart 7a-2 of pump, so upwards the rising adhering to of part R and pump outer surface 7a-1 of store oil 7.
As mentioned above, the range that is interrupted generation that disperses owing to oil can not produce according to the present invention at the abnormal sound of 2000～6300Hz in existing sealed compressor driven by electric-motor.
As other embodiments that can obtain effect same, isolation whirlpool means shown in Figure 21 are to be made of the C shape ring 15A with breaking part, and this C shape ring 15A imbeds among the outer surface 7a-1 of centrifugal oil feed pump 7a.C shape ring 15A is made by spring steel or synthetic resin and can improve the assembly manipulation performance.
Figure 22 has represented the modified example 15B of ring shown in Figure 19 15.The axial section of this ring 15B is a quadrilateral, and this dihedral ring 15B has along the outer surface of the internal surface inclination of whirlpool W.
According to variation shown in Figure 22, except can obtain with the same effect of ring shown in Figure 19, and dihedral (ring) thus the tip part of extruding bent axle can be fixed to the outer wall of oil feed pump, have the peculiar effect of the whirlpool W that forms store oil well like this.
Figure 23 has represented the modified example of dihedral ring 15B shown in Figure 22.
In this variation, formed and be located at the annular projection thing 15C of the oil feed pump 7a one of bent axle tip part.This annular projection thing 15C is forming after the outer surface cutting of the blank that waits the bent axle of making 6 by casting.When carrying out this cutting, the certain also cutting of the outer surface 7a-1 of the oil feed pump 7a of March end tip part simultaneously.
According to this modified example, except can obtain with the same effect of ring shown in Figure 19 15, it also has can save the peculiar effect that ring is installed in the assembly manipulation on the outer surface of oil feed pump 7a.
Figure 24 and then represented ring-shaped end piece 15D as another variation of whirlpool isolating means.This end block 15D has inside and outside two-layer conical perisporium 15D-1, the 15D-2 of the perisporium of part bottom of the centrifugal oil feed pump 7a that is equipped with at the end portion of bent axle 6, at the integrated annular projection thing 15D-3 that has formed with the same section shape of annular projection thing 15C shown in Figure 23 of the outer surface of the cone-shaped wall 15D-2 in the outside.The lower end of cone-shaped wall 15D-1, the 15D-2 in the inboard and the outside is linked up mutually by the lower end wall 15D-4 of annular.The top bottom that annular projection thing 15D-3 is arranged on oil feed pump 7a is of a size of the position at h place.
Can obtain the effect same according to this modified example with ring shown in Figure 19 15.
Figure 25 has represented to be located at the variation of centrifugal oil feed pump 7a of the end portion of bent axle 6.According to this variation, the outer surface of oil feed pump 7a is formed by the trochoidal surface 7a-1 of downward contraction with cylinderical surface 7a-1' that the lower end of this trochoidal surface 7a-1 joins, is fixed on this cylinderical surface 7a-1' by the rings 15 that are pressed into mode handle and ring 15 same structures shown in Figure 19.
According to this variation, except can obtain with the same effect of ring shown in Figure 19 15, it also has fixed position that reaches ring 15 and the peculiar effect that is pressed into the stabilization of power.
In addition, in the various embodiments described above, be illustrated though compressing mechanism is provided with motor in the bottom reciprocal compressor promptly is set on seal container top, may not be confined to the compressor of above-mentioned formation as Figure 19 to the embodiment of the invention shown in Figure 25 with regard to vertical enclosed shape motor compressor.For example, the rotary compressor that the motor bottom is provided with the rotary compressor structure is set also may be suitable on seal container top.
Can know by above explanation, first and second embodiment of the present invention and their modified example have prevented dispersing of when sealed compressor driven by electric-motor moves lubricant oil oil droplet effectively, therefore can prevent the sound that produces owing to the collision between oil droplet that disperses and the store oil pasta in existing this compressor effectively.
Claims (13)
1, a kind of sealed compressor driven by electric-motor, it has the seal container (5) of storing lubricant oil in the bottom, be arranged on motor (3) and compressing mechanism (1) in the store oil superjacent air space of this container, drive the bent axle (6) of the Vertical direction that links this compressing mechanism and above-mentioned motor, in this bent axle, be formed with fuel feeding path (6a), in addition, be provided with the centrifugal oil feed pump (7a) that is immersed in the above-mentioned store oil in the underpart of this bent axle, utilize the rotation of this bent axle that lubricant oil is delivered in the above-mentioned fuel feeding path from this store oil (7), also be provided with the means of the sound that when compressor operating, reduces the collision between oil droplet and the store oil pasta and produce, above-mentioned motor is arranged between above-mentioned compressor structure and the above-mentioned store oil, the means that reduce tut are by preventing that the stator core (3a) from above-mentioned motor of when compressor operating oil droplet from directly dropping in the above-mentioned store oil and constituted with means that this pasta collides, it is characterized in that, the above-mentioned collision means that prevent are that plate shape oil guide element (8A) below a stator core that is installed in above-mentioned motor constitutes, this oil guide element has the outward edge bigger than the outer ring of said stator iron core, be provided with jut (8a) in this outer edge, be provided with the downward part (8b that extends of outer surface of end coil (3c) along said stator at the inner ring place of this oil guide element, 8e), part (the 8b of above-mentioned downward extension, 8e) outer surface with above-mentioned end coil (3c) contacts, and perhaps outwards leaves from this outer surface.
2, a kind of sealed compressor driven by electric-motor, it has the seal container (5) of storing lubricant oil in the bottom, be arranged on motor (3) and compressing mechanism (1) in the store oil superjacent air space of this container, drive the bent axle (6) of the Vertical direction that links this compressing mechanism and above-mentioned motor, in this bent axle, be formed with fuel feeding path (6a), in addition, be provided with the centrifugal oil feed pump (7a) that is immersed in the above-mentioned store oil in the underpart of this bent axle, utilize the rotation of this bent axle that lubricant oil is delivered in the above-mentioned fuel feeding path from this store oil (7), also be provided with the means of the sound that when compressor operating, reduces the collision between oil droplet and the store oil pasta and produce, above-mentioned motor is arranged between above-mentioned compressor structure and the above-mentioned store oil, the means that reduce tut are by preventing that the stator core (3a) from above-mentioned motor of when compressor operating oil droplet from directly dropping in the above-mentioned store oil and constituted with means that this pasta collides, it is characterized in that, the above-mentioned collision means that prevent are made of an oily guide element (8B) with the borehole wall shape part (8f) on the outer surface that is installed in above-mentioned motor stator end coil (3c), and this oil guide element has the incline section (8g) with the consecutive fan out in lower end partly of above-mentioned borehole wall shape.
3, a kind of sealed compressor driven by electric-motor, it has the seal container (5) of storing lubricant oil in the bottom, be arranged on motor (3) and compressing mechanism (1) in the store oil superjacent air space of this container, drive the bent axle (6) of the Vertical direction that links this compressing mechanism and above-mentioned motor, in this bent axle, be formed with fuel feeding path (6a), in addition, be provided with the centrifugal oil feed pump (7a) that is immersed in the above-mentioned store oil in the underpart of this bent axle, utilize the rotation of this bent axle that lubricant oil is delivered in the above-mentioned fuel feeding path from this store oil (7), also be provided with the means of the sound that when compressor operating, reduces the collision between oil droplet and the store oil pasta and produce, above-mentioned motor is arranged between above-mentioned compressor structure and the above-mentioned store oil, the means that reduce tut are by preventing that the stator core (3a) from above-mentioned motor of when compressor operating oil droplet from directly dropping in the above-mentioned store oil and constituted with means that this pasta collides, it is characterized in that the above-mentioned collision means that prevent are made of the oily guide element (8C) that the circular disk on a stator end coil (3c) that is fixed on above-mentioned motor following constitutes.
4, a kind of sealed compressor driven by electric-motor, it has the seal container (5) of storing lubricant oil in the bottom, be arranged on motor (3) and compressing mechanism (1) in the store oil superjacent air space of this container, drive the bent axle (6) of the Vertical direction that links this compressing mechanism and above-mentioned motor, in this bent axle, be formed with fuel feeding path (6a), in addition, be provided with the centrifugal oil feed pump (7a) that is immersed in the above-mentioned store oil in the underpart of this bent axle, utilize the rotation of this bent axle that lubricant oil is delivered in the above-mentioned fuel feeding path from this store oil (7), also be provided with the means of the sound that when compressor operating, reduces the collision between oil droplet and the store oil pasta and produce, above-mentioned motor is arranged between above-mentioned compressor structure and the above-mentioned store oil, the means that reduce tut are by preventing that the stator core (3a) from above-mentioned motor of when compressor operating oil droplet from directly dropping in the above-mentioned store oil and constituted with means that this pasta collides, it is characterized in that, the above-mentioned collision means that prevent are made of an oily guide element (8D) with plane of inclination, and extend to the outer surface of the stator end coil (3C) of this motor from the outer edge of the lower end surface (3b) of above-mentioned motor stator-core (3a) this plane of inclination.
5, a kind of sealed compressor driven by electric-motor, it has the seal container (5) of storing lubricant oil in the bottom, be arranged on motor (3) and compressing mechanism (1) in the store oil superjacent air space of this container, drive the bent axle (6) of the Vertical direction that links this compressing mechanism and above-mentioned motor, in this bent axle, be formed with fuel feeding path (6a), in addition, be provided with the centrifugal oil feed pump (7a) that is immersed in the above-mentioned store oil in the underpart of this bent axle, utilize the rotation of this bent axle that lubricant oil is delivered in the above-mentioned fuel feeding path from this store oil (7), also be provided with the means that when compressor operating, reduce the collision between oil droplet and the store oil pasta and produce, above-mentioned motor is arranged between above-mentioned compressor structure and the above-mentioned store oil, the means that reduce tut are by preventing that the stator core (3a) from above-mentioned motor of when compressor operating oil droplet from directly dropping in the above-mentioned store oil and constituted with means that this pasta collides, it is characterized in that, above-mentioned prevent the collision means be one by anti-refrigeration agent, the oily guide element (8A-8D) that the oil resistance resin material is made.
6, a kind of sealed compressor driven by electric-motor, it has the seal container (5) of storing lubricant oil in the bottom, be arranged on motor (3) and compressing mechanism (1) in the store oil superjacent air space of this container, drive the bent axle (6) of the Vertical direction that links this compressing mechanism and above-mentioned motor, in this bent axle, be formed with fuel feeding path (6a), in addition, be provided with the centrifugal oil feed pump (7a) that is immersed in the above-mentioned store oil in the underpart of this bent axle, utilize the rotation of this bent axle that lubricant oil is delivered in the above-mentioned fuel feeding path from this store oil (7), also be provided with the means of the sound that when compressor operating, reduces the collision between oil droplet and the store oil pasta and produce, above-mentioned motor is arranged between above-mentioned compressor structure and the above-mentioned store oil, the means that reduce tut are by preventing that the stator core (3a) from above-mentioned motor of when compressor operating oil droplet from directly dropping in the above-mentioned store oil and constituted with means that this pasta collides, it is characterized in that the above-mentioned collision means that prevent are made of the floatability granular solids (8E) on the pasta that is placed in above-mentioned store oil (7).
7, a kind of sealed compressor driven by electric-motor, it has the seal container (5) of storing lubricant oil in the bottom, be arranged on motor (3) and compressing mechanism (1) in the store oil superjacent air space of this container, drive the bent axle (6) of the Vertical direction that links this compressing mechanism and above-mentioned motor, in this bent axle, be formed with fuel feeding path (6a), in addition, be provided with the centrifugal oil feed pump (7a) that is immersed in the above-mentioned store oil in the underpart of this bent axle, utilize the rotation of this bent axle that lubricant oil is delivered in the above-mentioned fuel feeding path from this store oil (7), also be provided with the means of the sound that when compressor operating, reduces the collision between oil droplet and the store oil pasta and produce, above-mentioned motor is arranged between above-mentioned compressor structure and the above-mentioned store oil, the means that reduce tut are by preventing that the stator core (3a) from above-mentioned motor of when compressor operating oil droplet from directly dropping in the above-mentioned store oil and constituted with means that this pasta collides, it is characterized in that the above-mentioned collision means that prevent are made of the porosity plate shape parts (8F) that are placed on the above-mentioned store oil pasta.
8, a kind of sealed compressor driven by electric-motor, it has the seal container (5) of storing lubricant oil in the bottom, be arranged on motor (3) and compressing mechanism (1) in the store oil superjacent air space of this container, drive the bent axle (6) of the Vertical direction that links this compressing mechanism and above-mentioned motor, in this bent axle, be formed with fuel feeding path (6a), in addition, be provided with the centrifugal oil feed pump (7a) that is immersed in the above-mentioned store oil in the underpart of this bent axle, utilize the rotation of this bent axle that lubricant oil is delivered in the above-mentioned fuel feeding path from this store oil (7), also be provided with the means of the sound that when compressor operating, reduces the collision between oil droplet and the store oil pasta and produce, it is characterized in that, above-mentioned centrifugal oil feed pump has the outer surface (7a-1) of downward contraction, the means of above-mentioned minimizing sound are made of whirlpool isolating means (15-15D), and this whirlpool isolating means makes the internal surface of the store oil whirlpool (W) that produces around this outer surface during compressor operating outwards far go from this outer surface (7a-1).
9, by the described compressor of claim 8, it is characterized in that, above-mentioned whirlpool isolating means is by the annular element (15-15B that is installed on the above-mentioned outer surface (7a-1), 15D) constitute, this annular element is positioned at the following of above-mentioned store oil (7) pasta and is arranged on from the position of (7a-2) bottom certain distance (h) up of above-mentioned outer surface (7a-1), the external diameter of this annular element (D1) is not more than the external diameter (D3) at the upper end of this outer surface (7a-1), and the external diameter of this annular element (D1) when ratio piston compressor is static external diameter (D2) in this conical external surface (7a-1) of store oil fuel head position big.
10, by the described compressor of claim 9, it is characterized in that it is circular that above-mentioned outer surface (7a-1) is actually, above-mentioned annular element (15,15A) has conical axial section shape.
11, by the described compressor of claim 9, it is characterized in that it is conical that above-mentioned outer surface (7a-1) is actually, above-mentioned annular element (15,15A) has tetragonal axial section shape.
12, by the described compressor of claim 9, it is characterized in that, it is conical that above-mentioned outer surface (7A-1) is actually, above-mentioned annular element (15D) at least by the perisporium (15D-2) that comprises the end portion that covers this outer surface (7a-1) and from the upper end of this perisporium outwards the end block of outstanding annular projection thing (15D-3) constituted.
By the described compressor of claim 8, it is characterized in that 13, it is conical that above-mentioned outer surface (7a-1) is actually, above-mentioned whirlpool isolating means is by being constituted with the integrally formed annular projection thing (15C) of this conical outer surface (7a-1).
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP68416/90 | 1990-03-20 | ||
| JP6841690 | 1990-03-20 | ||
| JP76814/90 | 1990-03-28 | ||
| JP7681490 | 1990-03-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1058455A CN1058455A (en) | 1992-02-05 |
| CN1022126C true CN1022126C (en) | 1993-09-15 |
Family
ID=26409643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN91102342A Expired - Fee Related CN1022126C (en) | 1990-03-20 | 1991-03-20 | Sealed compressor driven by electric-motor |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR910017076A (en) |
| CN (1) | CN1022126C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100396920C (en) * | 2003-06-27 | 2008-06-25 | 乐金电子(天津)电器有限公司 | Frame of hermetic compressor |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100396919C (en) * | 2003-06-27 | 2008-06-25 | 乐金电子(天津)电器有限公司 | Frame seam connection structure for hermetic compressor |
| CN100396921C (en) * | 2003-06-27 | 2008-06-25 | 乐金电子(天津)电器有限公司 | Frame structure of hermetic compressor |
| JP4812412B2 (en) * | 2005-11-29 | 2011-11-09 | 三洋電機株式会社 | Hermetic electric compressor |
| CN101842592B (en) * | 2007-11-02 | 2012-12-26 | 阿塞里克股份有限公司 | A compressor |
| JP2012197769A (en) * | 2011-03-23 | 2012-10-18 | Panasonic Corp | Hermetic compressor |
| US9341187B2 (en) | 2013-08-30 | 2016-05-17 | Emerson Climate Technologies, Inc. | Compressor assembly with liquid sensor |
| US10125768B2 (en) | 2015-04-29 | 2018-11-13 | Emerson Climate Technologies, Inc. | Compressor having oil-level sensing system |
-
1991
- 1991-03-20 KR KR1019910004360A patent/KR910017076A/en not_active Application Discontinuation
- 1991-03-20 CN CN91102342A patent/CN1022126C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100396920C (en) * | 2003-06-27 | 2008-06-25 | 乐金电子(天津)电器有限公司 | Frame of hermetic compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1058455A (en) | 1992-02-05 |
| KR910017076A (en) | 1991-11-05 |
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| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
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