JP2016145552A - Hermetic electric compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hermetic electric compressor in which agitation of oil and oil rising through winding-up operation are restricted to improve reliability in assurance of oil surface when an electric compressor is made small in size and its volume is made large and at the same time, accuracy in mounting work for an oil agitator oil winding-up preventive cover as well as its assembly characteristic, simplification in its configuration and low cost can be assured.SOLUTION: This invention relates to a hermetic electric compressor 1 comprising: a housing 2 of hermetic structure; a compressor 3 installed at an upper part in the housing 2; a motor 9 installed at the lower part of the compressor 3 in the housing 2 so as to drive the compressor 3 through a driving shaft 15; and an oil feeding pump 17 arranged at the lower end of the driving shaft 15 so as to feed oil filled in the housing 2 to a sliding part of the compressor 3 through an oil feeding hole 19 in the driving shaft 15. The motor 9 is a concentrated coil motor having a stator 10 with a concentrated coil 14 through resin insulation bobbins 12, 13 and an oil agitator or oil winding-up preventive cover 21 is removably or integrally arranged against its lower resin insulation bobbin 13.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a hermetic electric compressor in which a compressor and a motor for driving the compressor are housed in a hermetically sealed housing.

  In recent years, hermetic electric compressors tend to be smaller and larger in capacity, and at that time, without increasing the size of the compressor itself, the size is maintained by improving the compression mechanism, increasing the rotation speed of the compressor, etc. The method of increasing the capacity is adopted. In this case, the space volume inside the compressor becomes relatively small with respect to the circulation amount of the refrigerant. For this reason, there is a tendency that the sensitivity to the oil circulation rate (OC%) due to the oil level (oil amount) of the lubricating oil (hereinafter also simply referred to as oil) filled in the housing tends to increase, and countermeasures against oil rising are important. It becomes.

  As measures against oil spills, (1) Oil level is reduced to lower the oil level, or oil tanks are installed separately. (2) A motor rotor provided with an oil separation plate, a stirring prevention cover, a lower coil end provided with a partition member for isolating the upper and lower gas flows, or a gas bearing on the lower bearing to prevent contact with the oil level. What provided the winding prevention board (refer patent document 1). (3) A cylindrical partition member extending downward to the inner circumference is fitted and installed at the lower coil end, and the lower space of the motor is divided into an inner circumference space and an outer circumference space (see Patent Document 2) . (4) The motor lower space is partitioned up and down by a bearing installation member that provides a lower bearing to isolate the oil surface and gas flow, and the bearing member member is provided with a communication port with the opening on the anti-oil reservoir side in the circumferential direction. A thing (refer patent document 3) etc. are provided.

JP 2006-336545 A (Patent No. 4654774) JP 2010-38058 A JP 2010-121583 A

  As described above, the method of lowering the oil level by reducing the oil amount increases the risk of running out of the oil level and requires higher accuracy of the oil level management control, and the separate tank system is contrary to downsizing. In addition, there are problems such as a complicated structure and an increase in cost. In addition, as shown in Patent Documents 1 and 2, in the case where an oil separation plate, an agitation prevention cover, a partition member, etc. are provided at the coil ends of the rotor and the stator, the motor is increased in speed or installed. If there is a problem that it is difficult to ensure accuracy or the winding may be damaged, and an oil hoisting prevention plate is provided on the lower bearing, the hoisting is performed by increasing the gas flow rate due to an increase in the refrigerant circulation rate. There is a problem that oil is wound up from the gap of the prevention plate and the effect of preventing the oil from rising is reduced.

  Furthermore, as shown in Patent Document 3, in the case where the lower space of the motor is vertically divided by the installation member of the lower bearing, when the oil level rises above the installation member, the effect is reduced, so that the oil level is as much as possible. It is necessary to enlarge the oil sump so that it does not rise on the installation member, which is not only against downsizing, but also the installation member, which is a strength member, is enlarged, resulting in a complicated structure and increased costs. Have.

  The present invention has been made in view of such circumstances, and in increasing the size and capacity of an electric compressor, while suppressing the oil rising due to oil agitation and winding, the reliability of securing the oil level is improved. An object of the present invention is to provide a hermetic electric compressor capable of ensuring the installation accuracy, assembling property, simplification of configuration, and cost reduction of an oil agitation / winding prevention cover.

In order to solve the above-described problems, the hermetic electric compressor of the present invention employs the following means.
That is, a hermetic electric compressor according to the present invention includes a hermetically sealed housing, a compressor installed in an upper part of the housing, and a drive shaft installed in the housing at a lower part of the compressor. A motor that drives the compressor via the oil, and oil that is provided in a lower end portion of the drive shaft and filled in the housing is supplied to the sliding portion of the compressor via an oil supply hole in the drive shaft. An oil supply pump, and the motor is a concentrated winding motor having a stator in which a coil winding is concentratedly wound through a resin insulating bobbin, and the oil is pumped to the lower resin insulating bobbin. An agitation / winding prevention cover is detachably or integrally provided.

  According to the present invention, a resin insulated bobbin in a concentrated winding motor is used, and the oil agitation / winding prevention cover is detachably or integrally provided on the lower resin insulated bobbin. The lower side of the motor is attached to the lower resin insulation bobbin that is detachable or integrated with the lower resin insulation bobbin that is used when the coil winding is concentrated on the stator of the winding motor. By separating the space into upper and lower or inner and outer peripheral spaces, oil surface agitation due to rotation of the rotor, oil winding, or oil winding due to the refrigerant gas flow can be suppressed. In addition, a special construction method has been adopted for compressors with a double-sided bearing structure in which both ends of the drive shaft are supported by bearings by providing an agitation and hoisting prevention cover detachably or integrally with the lower resin insulation bobbin. Without this, it is possible to easily install the stirring and hoisting prevention cover on the insertion side of the bearing in a state where the stator is shrink-fitted. Therefore, even when the hermetic type electric compressor is increased in size and capacity, it is possible to suppress oil rising due to oil agitation and hoisting, and to improve the reliability of securing the oil level, and to install an oil agitation / hoisting prevention cover Accuracy, ease of assembly, simplification of configuration, and cost reduction can be ensured.

  Further, the hermetic electric compressor according to the present invention is the hermetic electric compressor described above, wherein the agitation / winding prevention cover is formed by a lower hole made of the lower resin made through the drive shaft through a through hole provided in a central portion. The insulating bobbin is detachably locked to either the inner periphery or the outer periphery of either the inner peripheral rod or the outer peripheral rod through a plurality of claws and locking holes.

  According to the present invention, the agitation / winding prevention cover has a driving shaft passing through a through hole provided in the center portion, and either the inner periphery or the outer periphery of either the inner periphery or the outer periphery of the lower resin insulating bobbin. Because it is detachably locked via a plurality of claws and locking holes, the agitation / winding prevention cover is made of a resin on the lower side of the motor stator with the drive shaft passing through the central through hole. A plurality of claws can be easily attached to either the inner periphery or the outer periphery of the inner bobbin or the outer ring of the insulating bobbin by locking the plurality of claws in the lock holes using its elastic deformation. Therefore, the agitation and hoisting prevention cover can be accurately installed on the lower end surface of the motor stator so as not to affect the motor performance, and the assembling and configuration are simplified and the cost is reduced. Can do.

  Further, the hermetic electric compressor according to the present invention is the hermetic electric compressor described above, wherein the agitation / winding prevention cover is formed by a lower hole made of the lower resin made through the drive shaft through a through hole provided in a central portion. The insulating bobbin is detachably press-fitted to the inner peripheral surface or the outer peripheral surface of either the inner peripheral flange or the outer peripheral flange of the insulating bobbin via a cylindrical portion.

  According to the present invention, the agitation / winding prevention cover has a driving shaft that passes through a through hole provided in the center portion, and the inner peripheral surface of either the inner peripheral surface or the outer peripheral surface of the lower resin insulating bobbin or Since the outer peripheral surface is detachably press-fitted through the cylindrical portion, the lower resin insulated bobbin of the motor stator with the agitation and hoisting prevention cover in the state where the drive shaft is passed through the central through hole The cylindrical portion can be easily attached to the inner peripheral surface or the outer peripheral surface of either the inner peripheral rod or the outer peripheral rod by crimping. Therefore, the agitation and hoisting prevention cover can be accurately installed on the lower end surface side of the motor stator so as not to affect the motor performance, and the assembling property, simplification of the configuration, and cost reduction are ensured. Can do.

  Further, the hermetic electric compressor according to the present invention is the hermetic electric compressor described above, wherein the agitation / winding prevention cover is formed by a lower hole made of the lower resin made through the drive shaft through a through hole provided in a central portion. The insulating bobbin is detachably screwed and coupled to either the inner peripheral surface or the outer peripheral surface of either the inner peripheral surface or the outer peripheral surface of the insulating bobbin via a screw portion.

  According to the present invention, the agitation / winding prevention cover has a driving shaft that passes through a through hole provided in the center portion, and the inner peripheral surface of either the inner peripheral surface or the outer peripheral surface of the lower resin insulating bobbin or Since it is detachably screwed into the outer peripheral surface via a screw part, the lower resin insulation bobbin of the motor stator has a stirring and hoisting prevention cover with the drive shaft passing through the central through hole. The screw can be easily attached by screwing the screw portion to the inner peripheral surface or the outer peripheral surface of either the inner peripheral rod or the outer peripheral rod. Therefore, the agitation and hoisting prevention cover can be installed accurately on the lower end side of the motor stator so as not to affect the motor performance, and the assembling and configuration are simplified and the cost is reduced. can do.

  Furthermore, the hermetic electric compressor of the present invention is the above-described hermetic electric compressor, wherein the stirring / winding prevention cover has an outer diameter that is closely fitted to the inner peripheral surface of the housing. And the flow path of a refrigerant | coolant and oil is provided in the outer peripheral part, It is characterized by the above-mentioned.

  According to the present invention, the agitation / winding prevention cover has an outer diameter that is closely fitted to the inner peripheral surface of the housing, and the refrigerant and oil flow passages are provided on the outer peripheral portion thereof. By closely fitting the outer diameter of the agitation and hoisting prevention cover installed on the lower resin insulation bobbin of the stator to the inner peripheral surface of the housing, the motor lower side space in the housing is separated vertically, and the rotor It is possible to suppress oil level agitation, oil hoisting, or oil hoisting due to the refrigerant gas flow, and to guide oil to the lower space and refrigerant to the upper space via the flow passage. Therefore, when the hermetic type electric compressor is reduced in size and capacity, oil rising due to oil agitation and winding can be suppressed to improve the reliability for securing the oil level, and the agitation / winding prevention cover can be attached to the motor stator. It can be easily installed on the lower end surface side with high accuracy so as not to affect the motor performance.

  Furthermore, in the hermetic electric compressor according to the present invention, in any one of the hermetic electric compressors described above, the stirring and hoisting prevention cover has an outer diameter corresponding to an outer diameter of the lower resin insulating bobbin. It is characterized by.

  According to the present invention, since the agitation / winding prevention cover has an outer diameter corresponding to the outer peripheral diameter of the lower resin insulating bobbin, the agitation / winding installed on the lower resin insulating bobbin of the motor stator. By the outer diameter of the prevention cover, the motor lower space in the housing is separated into a space that covers the inner peripheral side of the lower resin insulating bobbin and the other space, and the oil surface is stirred by the rotor, It is possible to suppress winding or oil winding by the refrigerant gas flow. Therefore, when the hermetic type electric compressor is reduced in size and capacity, the oil rising due to oil agitation and hoisting can be suppressed to improve the reliability of securing the oil level, and the agitation / hoisting prevention cover can be used as the motor stator. It can be installed easily and accurately so as not to affect the motor performance.

  Furthermore, the hermetic electric compressor according to the present invention is any one of the hermetic electric compressors described above, wherein the stirring and hoisting prevention cover has an outer diameter corresponding to an inner peripheral diameter of the lower resin-made insulating bobbin. It is characterized by being.

  According to the present invention, since the agitation / winding prevention cover has an outer diameter corresponding to the inner peripheral diameter of the lower resin insulating bobbin, the agitation / winding prevention cover is installed on the lower resin insulating bobbin of the motor stator. The motor lower side space in the housing is separated into a space that covers the lower part of the rotor on the inner peripheral side with respect to the lower resin insulating bobbin and the other space by the outer diameter of the hoisting prevention cover. Oil surface agitation, oil winding, or oil winding due to refrigerant gas flow can be suppressed. Therefore, when the hermetic type electric compressor is reduced in size and capacity, the oil rising due to oil agitation and hoisting can be suppressed to improve the reliability of securing the oil level, and the agitation / hoisting prevention cover can be used as the motor stator. It can be installed easily and accurately so as not to affect the motor performance.

  Furthermore, the hermetic electric compressor according to the present invention is any one of the hermetic electric compressors described above, wherein the stirring and hoisting prevention cover is lower than the lower resin insulating bobbin position in the lower space of the motor. It is characterized by being provided at a lower position by the dimension.

  According to the present invention, since the stirring / winding prevention cover is provided at a position below the lower resin insulating bobbin position by a predetermined dimension in the lower space of the motor, it is separated from the upper and lower sides by the stirring / winding prevention cover. Among the motor lower side spaces, the upper side space can be enlarged by an amount corresponding to the position where the agitation / winding prevention cover is positioned below, so that the effect of separating oil contained in the refrigerant gas flow can be enhanced. Therefore, the oil rising accompanying the refrigerant gas flow and the oil rising due to the winding of the oil in the refrigerant gas flow can be suppressed, and the reliability for securing the oil level can be improved.

  Furthermore, the hermetic electric compressor according to the present invention is characterized in that, in any of the hermetic electric compressors described above, the stirring and hoisting prevention cover has a plurality of ribs along the radial direction on the surface. .

  According to the present invention, since the agitation / winding prevention cover has a plurality of ribs along the radial direction on the surface, even if stress due to the pressure difference acts on the agitation / winding prevention cover due to pressure fluctuation in the housing. The strength can be ensured by a plurality of ribs along the radial direction, and deformation thereof can be suppressed. Therefore, it is possible to prevent a decrease in performance due to pressure deformation of the agitation / winding prevention cover, and maintain the reliability for securing the oil level.

  Furthermore, the hermetic electric compressor according to the present invention is the hermetic electric compressor described above, wherein the agitation / winding prevention cover is disposed below one of the inner peripheral rod and the outer peripheral rod of the lower resin insulating bobbin. By forming the cylindrical part extended in this, it is comprised integrally with the said lower resin insulation bobbin.

  According to the present invention, the agitation / winding prevention cover forms a cylindrical portion extending downward on either the inner peripheral flange or the outer peripheral flange of the lower resin insulating bobbin, thereby lowering the lower resin insulation. Since it is constructed integrally with the bobbin, the oil agitation and hoisting prevention cover is lowered by a cylindrical part formed by extending either the inner or outer peripheral flange of the lower resin insulating bobbin downward. The insulating resin bobbin can be integrated with the side resin insulating bobbin, and the lower side space of the motor can be separated into the inner and outer peripheral spaces by the stirring / winding prevention cover. Therefore, the cylindrical part is integrally provided on the lower resin insulation bobbin, which is a motor part, and the lower resin insulation bobbin is installed as a motor part to install the agitation and hoisting prevention cover. It can be isolated in the inner and outer peripheral space to suppress oil surface agitation by the rotor, oil hoisting, or oil hoisting by the refrigerant gas flow, and the hermetic electric compressor can be assembled by the same construction method as before Further, it is possible to ensure the ease of assembly, the simplification of the configuration, the cost reduction, and the like of the hermetic electric compressor provided with the oil agitation / winding prevention cover.

  Further, the hermetic electric compressor according to the present invention is the above hermetic electric compressor, wherein the cylindrical portion constituting the stirring and hoisting prevention cover has an inner peripheral flange of the lower resin insulating bobbin downward. It has an extended configuration, and has a horizontal flange portion bent outward so that an outer periphery thereof is in close contact with an inner peripheral surface of the housing.

  According to the present invention, the cylindrical portion constituting the agitation / winding prevention cover has a configuration in which the inner peripheral flange of the lower resin insulating bobbin is extended downward, and the outer periphery is at the lower end portion thereof on the inner peripheral surface of the housing. Since the horizontal flange portion bent outward is brought into close contact with the cylinder, the lower space of the motor can be separated from the inner and outer peripheral spaces by the cylindrical portion, and the lower space of the motor can be separated by the horizontal flange portion. Can also be isolated in the vertical direction. Therefore, oil level agitation by the rotor, oil hoisting, or oil hoisting by the refrigerant gas flow can be more effectively suppressed, and reliability for securing the oil level can be improved.

  Furthermore, the hermetic electric compressor according to the present invention is the above-described hermetic electric compressor, wherein the cylindrical portion constituting the agitation and hoisting prevention cover extends an outer peripheral flange of the lower resin insulating bobbin downward. The horizontal flange part bent by the inner peripheral side is provided in the lower end part, It is characterized by the above-mentioned.

  According to the present invention, the cylindrical portion constituting the agitation / winding prevention cover has a configuration in which the outer peripheral flange of the lower resin insulating bobbin is extended downward, and is bent at the lower end portion thereof to the inner peripheral side. Since the portion is provided, not only the lower space of the motor can be separated into the inner and outer peripheral spaces by the cylindrical portion, but also the lower space of the motor can be separated in the vertical direction by the horizontal flange portion. Therefore, oil level agitation by the rotor, oil hoisting, or oil hoisting by the refrigerant gas flow can be more effectively suppressed, and reliability for securing the oil level can be improved.

  Furthermore, the hermetic electric compressor of the present invention is the above-described hermetic electric compressor, wherein the cylindrical flange and the lower end thereof are bent to the inner peripheral side and the inner diameter of the horizontal flange portion is The outer diameter of the rotor of the motor is made larger.

  According to the present invention, the inner diameter of the horizontal flange portion provided by bending the cylindrical portion and the lower end portion thereof toward the inner peripheral side is made larger than the outer diameter of the rotor of the motor. Even if a cylindrical part is provided integrally on the inner peripheral flange or outer peripheral flange of the lower resin insulating bobbin, or a horizontal flange is bent at the lower end of the cylindrical part, the rotor to the inner periphery of the stator The motor can be easily assembled so as not to hinder the insertion. Therefore, it is possible to ensure ease of assembly, simplification of the configuration, cost reduction, and the like of the hermetic electric compressor provided with the oil agitation / winding prevention cover.

  According to the present invention, the agitation / winding prevention cover that is detachably or integrally provided on the lower resin insulating bobbin used when the coil winding is concentratedly wound on the stator of the concentrated winding motor. Thus, the lower side space of the motor can be separated into the upper and lower sides or the inner and outer peripheral spaces, and oil surface agitation due to rotation of the rotor, oil winding, or oil winding due to the refrigerant gas flow can be suppressed. In addition, a special construction method has been adopted for compressors with a double-sided bearing structure in which both ends of the drive shaft are supported by bearings by providing an agitation and hoisting prevention cover detachably or integrally with the lower resin insulation bobbin. Without the need to do so, it is possible to easily install an agitation and hoisting prevention cover on the insertion side of the bearing with the stator being shrink-fitted. It is possible to suppress oil rising due to hoisting and improve the reliability of securing the oil level, as well as to ensure installation accuracy and assemblability of the oil agitation and hoisting prevention cover, simplification of configuration and cost reduction, etc. it can.

1 is a cross-sectional view of a hermetic electric compressor according to a first embodiment of the present invention. It is an AA cross-section equivalent view of FIG. FIG. 2 is a partial perspective view of an oil agitation / winding prevention cover and a lower resin insulating bobbin on which the oil agitation / winding prevention cover is installed in the hermetic electric compressor. It is explanatory drawing (A), (B), (C) of the installation point with respect to the lower side resin insulation bobbin which expanded the a part of FIG. It is sectional drawing of the hermetic electric compressor which concerns on the modification 1 of the said 1st Embodiment. It is a BB cross-section equivalent figure of FIG. It is sectional drawing of the hermetic electric compressor which concerns on the modification 2 of the said 1st Embodiment. FIG. 8 is a cross-sectional view corresponding to a CC line in FIG. 7. It is sectional drawing (A) of the sealed electric compressor which concerns on the modification 3 of the said 1st Embodiment, and the enlarged views (B) and (C) of the b part and c part. It is sectional drawing (A) of the hermetic electric compressor which concerns on the modification 4 of the said 1st Embodiment, and the enlarged views (B) and (C) of the d part and the e part. It is sectional drawing (A) of the enclosed electric compressor which concerns on the modification 5 of the said 1st Embodiment, and the enlarged views (B) and (C) of the f part and g part. FIG. 12 is a DD cross-sectional view of FIG. 11. It is sectional drawing (A) of the hermetic electric compressor which concerns on the modification 6 of the said 1st Embodiment, and the enlarged view (B) of the h part and i part (C). It is the EE cross-section equivalent figure of FIG. It is sectional drawing (A) of the sealed electric compressor which concerns on the modification 7 of the said 1st Embodiment, and the enlarged views (B) and (C) of the j part and k part. FIG. 16 is a cross-sectional view corresponding to FF in FIG. 15. It is sectional drawing of the hermetic electric compressor which concerns on 2nd Embodiment of this invention. It is a GG cross-section equivalent view of FIG. It is sectional drawing of the hermetic electric compressor which concerns on the modification 1 of the said 2nd Embodiment. It is a HH cross-section equivalent view of FIG. It is sectional drawing of the hermetic electric compressor which concerns on the modification 2 of the said 2nd Embodiment. FIG. 22 is a cross-sectional view taken along the line II in FIG. 21.

Embodiments according to the present invention will be described below with reference to the drawings.
[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 4.
FIG. 1 is a cross-sectional view of a hermetic electric compressor according to the first embodiment of the present invention, FIG. 2 is a cross-sectional view corresponding to the AA cross section thereof, and FIG. 4 is a partial perspective view of the lower resin insulating bobbin on which the agitator is installed, and FIG. 4 is an explanatory view of the installation procedure for the lower resin insulating bobbin of the stirring / winding prevention member.
The hermetic electric compressor 1 includes a vertically long cylindrical housing 2 having a hermetic structure that constitutes an outer shell thereof.

  A compressor 3 is incorporated in the upper part of the housing 2. The compressor 3 here is a scroll compressor 3 including a pair of fixed scroll 4 and orbiting scroll 5, and is incorporated via a bearing member (also referred to as a frame member) 6 fixedly installed on the housing 2. ing. The high-pressure refrigerant gas compressed by the scroll compressor 3 is discharged into the discharge chamber 7 and sent to the refrigeration cycle side through the discharge pipe 8. The scroll compressor 3 is well known and does not employ a special configuration.

  In the housing 2, a motor 9 is fixed to the housing 2 below the scroll compressor 3. The motor 9 includes a stator 10 and a rotor 11, and the stator 10 is configured such that a coil winding 14 is concentratedly wound on upper and lower resin insulating bobbins 12 and 13 with respect to the stator core. ing. A drive shaft 15 is integrally coupled to the rotor 11, and a crank pin provided at the upper end of the drive shaft 15 serves as a drive bush and a swivel bearing against the back surface of the orbiting scroll 5 of the scroll compressor 3. Thus, the scroll compressor 3 can be driven.

  The upper end side of the drive shaft 15 is supported by the bearing member 6, and the lower end portion is supported by the bearing member 16 installed at the lower portion in the housing 2. An oil supply pump 17 is provided between the lower end portion of the drive shaft 15 and the bearing member 16, and lubricating oil (oil) filled in an oil reservoir 18 at the inner bottom portion of the sealed housing 2 is provided in the drive shaft 15. Oil is supplied to the sliding portion of the scroll compressor 3 through the oil supply hole 19. Such an oil supply mechanism is well known.

  The housing 2 is connected to a refrigerant suction pipe 20 that opens in a space between the lower part of the scroll compressor 3 and the upper part of the motor 9, and contains oil sucked into the housing 2 through the refrigerant suction pipe 20. The low-pressure refrigerant gas is separated from the oil in the housing 2, flows in the housing 2, is sucked into the scroll compressor 3, is compressed to a high pressure, and is discharged into the discharge chamber 7. On the other hand, the oil that has lubricated the sliding portion of the scroll compressor 3 passes through an oil passage along the inner wall of the housing 2 from an oil drain hole provided in the bearing member 6 and the oil separated from the refrigerant gas. It flows down to the oil sump 18 to ensure a constant oil level at the bottom of the housing 2.

  However, when the hermetic electric compressor 1 is operated, the oil in the oil sump 18 and the oil that flows down after being lubricated on the sliding portion of the scroll compressor 3 or separated from the suction refrigerant gas are transferred to the housing. 2, the refrigerant gas is agitated by the flow of the refrigerant gas flowing through the inside of the motor 2 and the rotation of the motor 9, or is wound up, and is sucked into the scroll compressor 3 together with the refrigerant gas. Circulated. As a result, oil rises.

  This oil rise hinders heat exchange by circulating the oil to the refrigeration cycle, thereby deteriorating the efficiency of the system, or the amount of oil for lubricating the sliding portion of the compressor 3 is insufficient, resulting in poor lubrication. However, as the hermetic electric compressor 1 is reduced in size and capacity, the space volume inside the compressor becomes relatively small with respect to the refrigerant circulation amount. It tends to become more prominent.

  As a countermeasure, in this embodiment, a configuration in which an agitation / winding prevention cover 21 is installed in the lower space of the motor 9 to suppress oil agitation and winding is adopted. Is installed using a lower resin insulating bobbin 13 constituting the stator 10 of the motor 9 which is a concentrated winding motor.

  The resin insulating bobbins 12 and 13 here are resin molded products having insulation properties interposed between the teeth when the coil winding 14 is concentratedly wound around the teeth of the stator core, and the molding accuracy is low. The inner circumference has a high and constant strength, and has an outer circumferential flange 22 continuous in the circumferential direction on the outer circumferential side and a notch for winding the coil winding 14 corresponding to the slot between the teeth on the inner circumferential side. It is supposed to be equipped with a ridge 23. In the present embodiment, the stirring / raising prevention cover 21 is detachably installed on the outer peripheral flange 22 of the lower resin insulating bobbin 13.

  For this reason, as shown in FIG. 3, the outer peripheral flange 22 of the lower resin insulating bobbin 13 has a plurality of locations along the circumferential direction on the tip side (in this embodiment, four examples are shown, but at least It is desirable to provide at three or more locations.) At equal intervals, a locking hole 24 for locking a hooking claw (claw) 29 on the stirring / winding prevention cover 21 described below is provided.

  Further, as shown in FIG. 3, the oil agitation / winding prevention cover 21 is provided with a through hole 26 penetrating the drive shaft 15 at the center portion on the disk 25, and oil and refrigerant gas at the outer peripheral portion. The outer peripheral portion of the disk 24 having an outer diameter that is closely fitted to the inner periphery of the housing 2 is provided with a plurality of small holes 27 that serve as the flow passages 28 that circulate through the outer periphery. A plurality of hooking claws (claws) 29 projecting upward are provided at a plurality of locations corresponding to the locking holes 24 provided in the outer peripheral flange 22 of the lower resin insulating bobbin 13.

  As shown in FIGS. 4A, 4B, and 4C, the hooking claws 29 are elastically deformed and pushed into the inner peripheral side of the outer peripheral flange 22 of the lower resin insulating bobbin 13. Thus, the agitation / winding prevention cover 21 is fitted and locked in the locking hole 24 and is detachably installed on the outer peripheral flange 22 of the lower resin insulating bobbin 13. Further, the agitation / winding prevention cover 21 installed on the outer peripheral flange 22 of the lower resin insulating bobbin 13 is closely fitted to the inner periphery of the housing 2 so that the motor 9 in the housing 2 The lower space is vertically separated at a predetermined position.

With the configuration described above, according to the present embodiment, the following operational effects can be obtained.
The hermetic electric compressor 1 is driven by starting up a motor 9 and drives the orbiting scroll 5 of the scroll compressor 3 to revolve around the fixed scroll 4 via a drive shaft 15 rotated by the motor 9. Thus, the compression action is performed as is known. That is, the low-pressure refrigerant gas sucked into the housing 2 from the refrigeration cycle side through the suction pipe 20 is separated into the oil and flows in the housing 2 and then sucked into the scroll compressor 3 and compressed into high-pressure gas and discharged. After being discharged into the chamber 7, it is sent to the refrigeration cycle side through the discharge pipe 8.

  On the other hand, the oil filled in the oil reservoir 18 at the bottom of the housing 2 is supplied to the sliding portion of the crawl compressor 3 through the oil supply hole 19 by the oil supply pump 17 when the drive shaft 15 is rotated. After lubricating a required sliding part, it is discharged into the housing 2 through an oil drain hole provided in the bearing member 6, and is lowered through an oil passage or the like so as to avoid contact with the refrigerant gas flow. It flows down to the oil sump 18.

  The oil stored in the oil reservoir 18 while retaining the oil level, the oil after lubricating the sliding portion of the crawl compressor 3 and the oil separated from the suction refrigerant gas are generated by the rotation of the motor 9 (rotor 11). By agitation, winding by that, or winding by the refrigerant gas flow, the refrigerant is sucked into the scroll compressor 3 together with the refrigerant gas, and part of the oil rises from the sealed electric compressor 1 to the refrigeration cycle side together with the compressed gas. In order to suppress this oil rising, an agitating / raising prevention cover 21 is detachably installed on the stator 10 by using the outer peripheral flange 22 of the lower resin insulating bobbin 13 to agitate the lower space of the motor 9. -It is separated up and down by the hoisting prevention cover 21.

  In this way, by providing the agitation / winding prevention cover 21 and separating the space above and below the lower side of the motor 9, oil surface agitation due to rotation of the rotor 11, oil oil hoisting, or oil oil hoisting by the refrigerant gas flow can be performed. Can be suppressed. In addition, the compressor 1 having a double-sided bearing structure in which both ends of the drive shaft 15 are supported by bearings (bearing members) 6 and 16 by providing the stirring and hoisting prevention cover 21 detachably on the lower resin insulating bobbin 13. However, it is possible to easily install the stirring / lifting prevention cover 21 on the insertion side of the bearings (bearing members) 6 and 16 in a state where the stator 10 is shrink-fitted into the housing 2 without adopting a special method. it can.

  Therefore, even when the hermetic electric compressor 1 is reduced in size and capacity, oil rising due to oil agitation and winding can be suppressed, reliability for securing the oil level can be improved, and oil agitation / winding prevention cover 21 can be improved. It is possible to ensure the installation accuracy, assembling ability, simplification of configuration, and cost reduction.

  Further, the agitation / winding prevention cover 21 has a drive shaft 15 passing through a through hole 26 provided in the center, and a plurality of claws (hanging claws) on the inner periphery of the outer peripheral flange 22 of the lower resin insulating bobbin 13. ) 29 and the locking hole 24 are detachably locked, so that the agitation / winding prevention cover 21 is passed through the drive shaft 15 through the through hole 26 in the center and the lower side of the motor stator 10. A plurality of claws (hanging claws) 29 can be easily attached to the inner periphery of the outer peripheral flange 22 of the resin insulating bobbin 13 by locking the locking holes 24 using the elastic deformation thereof. Accordingly, the agitation / winding prevention cover 21 can be accurately installed on the lower end surface side of the motor stator 10 so as not to affect the motor performance, and its assembling and configuration are simplified and the cost is reduced. Can be secured.

  Further, the agitation / winding prevention cover 21 has an outer diameter closely fitted to the inner peripheral surface of the housing 2, and refrigerant and oil flow passages 28 (many small holes 27) are provided on the outer peripheral portion thereof. It has been. Thus, by closely fitting the outer diameter of the agitation / winding prevention cover 21 installed on the lower resin insulating bobbin 13 of the motor stator 10 to the inner peripheral surface of the housing 2, the motor lower side space in the housing 2. Can be prevented from being stirred up and down by rotating the rotor 11 to prevent oil agitation, oil hoisting, or oil hoisting by the refrigerant gas flow, and the oil agitating / raising prevention cover via the flow passage 28. The lower space of 21 and the refrigerant can be guided to the upper space.

  As a result, when the hermetic electric compressor 1 is increased in size and capacity, oil rising due to oil agitation and winding can be suppressed to improve the reliability for securing the oil level, and the agitation / winding prevention cover 21 can be used as a motor. It can be easily installed on the lower end surface side of the stator 10 with high accuracy so as not to affect the motor performance.

  In the first embodiment described above, the stirring / lifting prevention cover 21 is detachably attached to the inner peripheral surface of the outer peripheral flange 22 of the lower resin insulating bobbin 13 via the hooking claws 29 and the locking holes 24. However, the agitation / winding prevention cover 21 may be installed on the lower resin insulating bobbin 13 by various modifications 1-7 as described below.

[Modification 1]
In this modified example 1, instead of the hooking claw (claw) 29 and the locking hole 24, as shown in FIG. 5 and FIG. A cylindrical portion 30 having a predetermined height is integrally provided, and the cylindrical portion 30 is press-fitted to the outer peripheral surface of the outer peripheral flange 22 of the lower resin insulating bobbin 13 to thereby provide a stirring / raising prevention cover. 21 is detachably installed on the lower resin insulating bobbin 13 of the stator 10. In this case, as shown in the drawing, it is desirable that the height of the outer peripheral flange 22 of the lower resin insulating bobbin 13 is slightly higher.

  In this way, the agitation / winding prevention cover 21 is passed through the drive shaft 15 through the through-hole 26 provided at the center, and the outer peripheral surface of the outer peripheral flange 22 of the lower resin-made insulating bobbin 13 via the cylindrical portion 30. The outer peripheral flange of the lower resin insulating bobbin 13 on the lower side of the motor stator 10 with the agitation / winding prevention cover 21 in a state where the drive shaft 15 is passed through the central through hole 26 can also be detachably crimped. The cylindrical portion 30 can be easily attached by crimping and fitting to the outer peripheral surface of 22. For this reason, the agitation / winding prevention cover 21 can be accurately installed on the lower end surface side of the motor stator 10 so as not to affect the motor performance. Can be ensured.

[Modification 2]
As shown in FIGS. 7 and 8, in the second modification, a cylindrical portion 31 having a predetermined height protruding upward is integrally formed at a radial intermediate portion on the disc 25 of the stirring / raising prevention cover 21. The cylindrical portion 31 is press-fitted to the inner peripheral surface of the inner peripheral flange 23 of the lower resin insulating bobbin 13, so that the agitation / winding prevention cover 21 is insulated from the lower resin insulation of the stator 10. The bobbin 13 is detachably installed. In this case, as shown in the figure, it is desirable that the height of the inner peripheral flange 23 of the lower resin insulating bobbin 13 is slightly higher.

  As described above, the agitation / winding prevention cover 21 passes through the drive shaft 15 through the through hole 26 provided in the center, and the cylindrical portion 31 is formed on the inner peripheral surface of the inner peripheral flange 23 of the lower resin insulating bobbin 13. Also, the lower resin insulating bobbin 13 of the lower side of the motor stator 10 with the agitation / winding prevention cover 21 in the state where the drive shaft 15 is passed through the through hole 26 in the center portion can also be detachably press-fitted via The cylindrical portion 31 can be easily attached by crimping and fitting to the inner peripheral surface of the inner peripheral flange 23. Accordingly, the agitation / winding prevention cover 21 can be accurately installed on the lower end surface side of the motor stator 10 so as not to affect the motor performance, and assembling and configuration are simplified and the cost is reduced. can do.

[Modification 3]
As shown in FIGS. 9 (A), (B), and (C), the third modified example is configured such that the outer diameter of the agitation / winding prevention cover 21 is the same as the diameter of the outer peripheral flange 22 of the lower resin insulating bobbin 13. The hooking claws (claws) 32 are provided at a plurality of positions (at least three or more) on the outer peripheral portion at equal intervals, and the hooking claws (claws) 32 are arranged on the outer periphery of the lower resin insulating bobbin 13. The agitation / winding prevention cover 21 of the lower resin insulating bobbin 13 is secured to the locking holes 33 provided at a plurality of positions on the front end side of the flange 22 by using elastic deformation from the inner peripheral side. It is installed so as to be detachable from the outer peripheral flange 22.

  In this way, the stirring / winding prevention cover 21 has an outer diameter corresponding to the diameter of the outer peripheral flange 22 of the lower resin insulating bobbin 13, and the stirring / winding prevention cover 21 is the outer peripheral flange of the lower resin insulating bobbin 13. The stirrer / roller installed on the lower resin insulation bobbin 13 of the motor stator 10 can also be configured so as to be detachably installed on the motor 22 via the hooking claws 32 and the locking holes 33. By the outer diameter of the prevention cover 21, the motor lower side space in the housing 2 is separated into a space that covers the inner peripheral side of the lower resin insulating bobbin 13 and a space other than that, and oil generated by the rotation of the rotor 11 is separated. Surface agitation, oil hoisting, or oil hoisting by refrigerant gas flow can be suppressed.

  Therefore, according to the third modified example, when the hermetic electric compressor 1 is increased in size and capacity, it is possible to suppress oil rising due to oil agitation and winding, and to improve the reliability of securing the oil level. The hoisting prevention cover 21 can be easily installed on the lower end surface side of the motor stator 10 with high accuracy so as not to affect the motor performance.

  In the case of this modification, the outer diameter of the stirring / winding prevention cover 21 is substantially the same as the outer diameter of the outer peripheral flange 22 of the lower resin insulating bobbin 13, and is in close contact with the inner peripheral surface of the housing 2. Therefore, the flow passage 28 composed of a large number of small holes 27 is not necessary. Further, as shown in FIG. 9C, the agitation / winding prevention cover 21 is naturally provided with a through hole 26 having a diameter slightly larger than the outer diameter of the drive shaft 15.

[Modification 4]
As shown in FIGS. 10A, 10 </ b> B, and 10 </ b> C, the modified example 4 is configured such that the outer diameter of the stirring / winding prevention cover 21 is the same as the diameter of the outer peripheral flange 22 of the lower resin insulating bobbin 13. A plurality of hooking claws (claws) 34 projecting upward at equal intervals in the circumferential direction are provided at a plurality of radial intermediate positions on the disk 25, and the hooking claws (claws) have the same diameter. ) 34 is locked to the locking holes 35 provided at a plurality of positions on the distal end side of the inner peripheral flange 23 of the lower resin insulating bobbin 13 by utilizing elastic deformation from the inner peripheral side. The hoisting prevention cover 21 is detachably installed on the inner peripheral flange 23 of the lower resin insulating bobbin 13.

  Even with such a configuration, the lower side of the motor in the housing 2 depends on the outer diameter of the agitation / winding prevention cover 21 installed on the lower resin insulating bobbin 13 of the motor stator 10 as in the third modification. The space is separated into a space that covers the inner peripheral side of the lower resin insulating bobbin 13 and a space other than that, and the oil surface is stirred by the rotation of the rotor 11, the oil is wound up, or the oil flow by the refrigerant gas flow Winding can be suppressed. Therefore, when the hermetic type electric compressor 1 is reduced in size and capacity, oil rising due to oil agitation and winding can be suppressed to improve the reliability for securing the oil level, and the agitation / winding prevention cover 21 is fixed to the motor. It can be easily installed on the lower end surface side of the child 10 with high accuracy so as not to affect the motor performance.

[Modification 5]
As shown in FIGS. 11 (A), 11 (B), 11 (C), and FIG. 12, this modified example 5 has an outer diameter of the stirring / raising prevention cover 21 and an outer peripheral flange 22 of the lower resin insulating bobbin 13. The outer flange has a substantially the same diameter, and a bent flange portion 36 is provided by bending and extending the outer peripheral edge upward. A plurality of hooking claws (claws) 37 protruding upward at equal intervals in the circumferential direction are provided at a plurality of locations on the upper edge of the bending flange portion 36, and the hooking claws (claws) 37 are The agitation / winding-up prevention cover 21 is lowered by locking the locking holes 38 provided at a plurality of positions on the distal end side of the outer peripheral flange 22 of the resin insulating bobbin 13 by using elastic deformation from the inner peripheral side. The side resin insulating bobbin 13 is detachably installed on the outer peripheral flange 22.

  Thus, the installation position of the agitation / winding prevention cover 21 can be installed at a position lower than the lower end position of the lower resin insulating bobbin 13 by a predetermined dimension in the lower space of the motor 9. Further, as shown in FIG. 12, a plurality of ribs 39 along the radial direction are provided in a cross shape on the upper surface of the disc 25 of the stirring / winding prevention cover 21, and the pressure fluctuation of the stirring / winding prevention cover 21 is changed. To withstand pressure.

  Further, as described above, the stirring / winding prevention cover 21 is provided at a position below the position of the lower resin insulating bobbin 13 in the lower space of the motor 9 by a predetermined dimension so that the stirring / winding prevention cover 21 Of the motor lower side space that is isolated by the above, the upper side space is enlarged by an amount corresponding to the position where the agitation / winding prevention cover 21 is positioned below, and is appropriately sized to enhance the effect of separating oil contained in the refrigerant gas flow. Can do. For this reason, the oil rising accompanying the refrigerant gas flow and the oil rising due to the winding of the oil in the refrigerant gas flow can be suppressed, and the reliability for securing the oil level can be improved.

  Further, by providing a plurality of ribs 39 along the radial direction on the surface of the disc 25 with respect to the stirring / winding prevention cover 21, the pressure difference in the stirring / winding prevention cover 21 due to pressure fluctuation in the housing 2 is provided. Even if the stress caused by the above acts, the strength can be secured by the plurality of ribs 39 along the radial direction, and the deformation can be suppressed. Therefore, it is possible to prevent a decrease in performance due to pressure deformation of the agitation / winding prevention cover 21 and to maintain reliability in securing the oil level.

[Modification 6]
As shown in FIGS. 13 (A), (B), (C) and FIG. 14, this modified example 6 extends the tip of the inner peripheral flange 23 of the lower resin insulating bobbin 13 to increase the height. The upper portion is provided with a screw portion 40, and an upward bending flange portion 41 is provided on the outer peripheral portion of the stirring / raising prevention cover 21 having the same diameter as the inner peripheral flange 23 of the lower resin insulating bobbin 13. The screw portion 42 to be screwed to the screw portion 40 is provided on the inner peripheral surface thereof, and the agitation / winding prevention cover 21 is provided to the screw portion 40 on the inner peripheral flange 23 side of the lower resin insulating bobbin 13. The agitation / winding prevention cover 21 is detachably installed by screwing the screw portion 42 on the side.

  In this way, the agitation / winding prevention cover 21 having an outer diameter substantially the same diameter as the inner peripheral flange 23 of the lower resin insulating bobbin 13 is installed on the inner peripheral flange 23 of the lower resin insulating bobbin 13 and This also isolates the motor lower side space in the housing 2 into a space covering the lower part of the rotor 11 on the inner peripheral side of the lower resin insulating bobbin 13 and a space other than that, and the rotor. 11 can suppress oil surface agitation, oil winding, or oil winding by the refrigerant gas flow. For this reason, when the hermetic electric compressor 1 is increased in size and capacity, it is possible to suppress oil rising due to oil agitation and winding, and to improve the reliability for securing the oil level.

  Further, since the stirring / winding prevention cover 21 is configured to be detachably screwed and coupled to the outer peripheral surface of the inner peripheral flange 23 of the lower resin insulating bobbin 13 via the screw portions 40, 42, the stirring / winding prevention cover 21 is provided. A screw portion 42 is screwed into the outer peripheral surface of the inner peripheral flange 23 of the lower resin insulating bobbin 13 of the motor stator 10 with the cover 21 passing through the drive hole 15 through the through hole 26 in the center. By doing so, it can be easily attached. Accordingly, the agitation / winding prevention cover 21 can be accurately installed on the lower end surface side of the motor stator 10 so as not to affect the motor performance, and the assembling property, the simplification of the configuration, and the cost reduction are ensured. can do.

[Modification 7]
As shown in FIGS. 15 (A), (B), (C) and FIG. 16, this modified example 7 extends the tip of the outer peripheral flange 22 of the lower resin insulating bobbin 13 to increase the height. Then, a screw portion 43 is provided at that portion, and an upward bending flange portion 44 is provided at the outer peripheral portion of the stirring / winding prevention cover 21 having the same diameter as the outer peripheral flange 23 of the lower resin insulating bobbin 13, A screw portion 45 that is screw-coupled to the screw portion 43 is provided on the outer peripheral surface, and the screw portion on the stirring and hoisting prevention cover 21 side with respect to the screw portion 43 on the outer peripheral flange 22 side of the lower resin insulating bobbin 13. The agitation / winding prevention cover 21 is detachably installed by screwing 45.

  Even with this configuration, similarly to the above-described modification 6, the motor lower side space in the housing 2 is reduced by the outer diameter of the stirring / lifting prevention cover 21 installed on the lower resin insulating bobbin 13 of the motor stator 10. The lower resin insulating bobbin 13 is separated into a space that covers the inner peripheral side of the insulating resin bobbin 13 and a space other than that, and the agitation of the oil surface by the rotation of the rotor 11, the winding of the oil, or the winding of the oil by the refrigerant gas flow Can be suppressed.

  Therefore, when the hermetic type electric compressor 1 is reduced in size and capacity, oil rising due to oil agitation and winding can be suppressed to improve the reliability for securing the oil level, and the agitation / winding prevention cover 21 is fixed to the motor. The screw 10 can be easily installed on the lower end surface side of the child 10 with high accuracy so as not to affect the motor performance, and the assembling property, the simplification of the configuration, and the cost reduction can be ensured.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS.
This embodiment is different from the first embodiment in that the agitation / winding prevention cover 21A is integrated with the lower resin insulating bobbin 13. Since other points are the same as those in the first embodiment, description thereof will be omitted.
In this embodiment, as shown in FIGS. 17 and 18, the tip end side of the inner peripheral flange 23 of the lower resin insulating bobbin 13 constituting the stator 10 of the concentrated winding motor 9 is extended downward. A cylindrical portion 50 is formed, and the cylindrical portion 50 is formed as a stirring / raising prevention cover 21 </ b> A, and the stirring / raising prevention cover 21 </ b> A is integrated with the lower resin insulating bobbin 13.

  In this way, the cylindrical portion 50 is formed by extending the tip end side of the inner peripheral flange 23 of the lower resin insulating bobbin 13 downward, and the cylindrical portion 50 is made of the lower resin as a stirring / winding prevention cover 21A. By adopting a configuration integrated with the insulating bobbin 13, the lower space of the motor 9 is isolated from the inner and outer peripheral space by the stirring / winding prevention cover 21A, and the oil surface is stirred by the motor rotor 11, the oil is wound, or The oil winding due to the refrigerant gas flow can be suppressed.

  Therefore, the cylindrical portion 50 is integrally provided on the lower resin-made insulating bobbin 13 that is a motor part, and the lower resin-made insulating bobbin 13 is simply incorporated into the stator 10 as a motor part. A stirring / winding prevention cover 21A is installed on the side, and the lower side space of the motor 9 is separated into the inner and outer peripheral spaces, and the oil surface is stirred by the rotation of the rotor 11, the oil is wound, or the oil is wound by the refrigerant gas flow. Can be suppressed. Moreover, the hermetic electric compressor 1 can be assembled by the same construction method as before, and the assembling of the hermetic electric compressor 1 provided with the oil agitation / winding prevention cover 21A is simplified, the configuration is simplified, and the cost is reduced. Can be secured.

  In the above embodiment, the cylindrical portion 50 is formed by extending the distal end side of the inner peripheral flange 23 of the lower resin insulating bobbin 13 downward, and the cylindrical portion 50 is used as the stirring / raising prevention cover 21A. However, it goes without saying that a cylindrical portion may be formed on the outer peripheral flange 22 side and a stirring / winding prevention cover may be provided integrally. Moreover, it is good also as the following modifications 1-2.

[Modification 1]
As shown in FIGS. 19 and 20, this modified example has a lower end portion of the cylindrical portion 50 formed by extending an inner peripheral flange 23 of the lower resin insulating bobbin 13 downward, and an outer periphery of the housing 2. A horizontal flange portion 51 bent outwardly in close contact with the inner peripheral surface is provided, and an oil and refrigerant flow passage 53 including a plurality of small holes 52 is provided on the outer peripheral portion of the horizontal flange portion 51. is there.

  As described above, the outer periphery closely contacts the inner peripheral surface of the housing 2 at the lower end portion of the stirring / raising prevention cover 21 </ b> A constituted by the cylindrical portion 50 extending downward from the inner peripheral flange 23 of the lower resin insulating bobbin 13. By providing the horizontal flange portion 51 bent outward, the lower side space of the motor 9 can be separated from the inner and outer peripheral spaces by the cylindrical portion 50, and the lower side of the motor 9 can be separated by the horizontal flange portion 51. The space can be isolated on the top and bottom. Therefore, oil surface agitation by the rotor 11, oil winding, or oil winding by the refrigerant gas flow can be more effectively suppressed, and the reliability for securing the oil surface can be improved.

[Modification 2]
In this modification, as shown in FIGS. 21 and 22, the outer peripheral flange 22 of the lower resin insulating bobbin 13 is extended downward to form a cylindrical portion 54, and the cylindrical portion 54 is stirred and wound up. The prevention cover 21A is formed, and the stirring / lifting prevention cover 21A is integrated with the outer peripheral flange 22 of the lower resin insulating bobbin 13, and a horizontal flange portion 55 bent to the inner peripheral side is formed at the lower end portion of the cylindrical portion 54. It is provided.

  As described above, the outer peripheral flange 22 of the lower resin insulating bobbin 13 is extended downward to form the cylindrical portion 54. The cylindrical portion 54 is used as the agitation / winding prevention cover 21A, and the lower end portion thereof has an inner portion. By adopting a configuration in which the horizontal flange portion 55 bent to the peripheral side is provided, not only the lower side space of the motor 9 can be separated into the inner and outer peripheral spaces by the cylindrical portion 54, but also the motor 9 can be separated by the horizontal flange portion 55. The lower side space can also be isolated vertically. Therefore, also in this modified example, as in modified example 1, oil level agitation by the rotor 11, oil hoisting, or oil hoisting by the refrigerant gas flow can be more effectively suppressed, and the oil level can be secured. The reliability with respect to can be improved.

[Modification 3]
This modification is the same as that in the second embodiment and Modifications 1 and 2, in which the inner peripheral flange 23 of the lower resin-made insulating bobbin 13 is extended downward and the inner diameter of the cylindrical portion 50 and the lower portion of the outer peripheral flange 22. The inner diameter of the horizontal flange portion 55 provided at the lower end of the cylindrical portion 54 formed so as to extend to be slightly larger than the outer diameter of the motor rotor 11, and the inner diameter of the cylindrical portion 50 and the horizontal flange portion 55. The motor rotor 11 is configured to penetrate through the inner diameter.

  With the above configuration, the cylindrical portion 50 is integrally provided on the inner peripheral flange 23 and the outer peripheral flange 22 of the lower resin insulating bobbin 13 on the motor stator 10 side, or at the lower end portion of the cylindrical portion 54. Even if the horizontal flange portion 55 is bent, the motor 9 can be easily assembled so as not to hinder the insertion of the rotor 11 into the inner periphery of the stator 10. Therefore, it is possible to ensure ease of assembly, simplification of the configuration, cost reduction, and the like in the hermetic electric compressor 1 in which the motor stator 10 is provided with the oil agitation / winding prevention cover 21A.

In addition, this invention is not limited to the invention concerning the said embodiment, In the range which does not deviate from the summary, it can change suitably. For example, in the above embodiment, the compressor 3 is a scroll compressor, but the format of the compressor 3 is not limited to the scroll compressor, and may be of any format.
Further, the oil and refrigerant flow passages 28 and 53 formed in the small holes 27 and 52 and the like provided in the stirring and hoisting prevention covers 21 and 21A are not limited to the small holes 27 and 52, and may be configured by notches or the like. Good.

  Further, the claws 29, 32, 34, 37 and the like for detachably locking the stirring / winding prevention cover 21 are not limited to the hooking claws of the above-described embodiment, and can be changed to various shapes. Further, the claws 29, 32, 34, 37 and the locking holes 24, 33, 35, 38, etc. are provided on the opposite sides of the agitation / winding prevention cover 21 and the lower resin insulating bobbin 13. Also good.

1 Hermetic Electric Compressor 2 Housing 3 Compressor (Scroll Compressor)
9 Motor 10 Stator 11 Rotor 12, 13 Resin insulation bobbin (13 Lower resin insulation bobbin)
14 Coil winding 15 Drive shaft 17 Oil supply pump 19 Oil supply holes 21, 21A Stirring and hoisting prevention cover 22 Outer peripheral flange 23 Inner peripheral flanges 24, 33, 35, 38 Locking hole 26 Through holes 28, 53 Flow passages 29, 32, 34, 37 hook nail
30, 31 Cylindrical part 39 Rib 40, 42, 43, 45 Screw part 50, 54 Cylindrical part 51, 55 Horizontal flange part

Claims (13)

A sealed housing;
A compressor installed at an upper portion in the housing;
A motor installed in the housing at a lower part of the compressor and driving the compressor via a drive shaft;
An oil supply pump that is provided at a lower end portion of the drive shaft and supplies oil filled in the housing to a sliding portion of the compressor via an oil supply hole in the drive shaft;
The motor is a concentrated winding motor having a stator in which a coil winding is concentratedly wound through a resin insulating bobbin,
A hermetic electric compressor characterized in that the oil agitation / winding prevention cover is detachably or integrally provided with respect to the lower resin insulating bobbin.   The agitation / winding prevention cover has a through hole provided in a central portion thereof, and the drive shaft passes therethrough, and a plurality of inner periphery or outer periphery of either the inner periphery or the outer periphery of the lower resin insulating bobbin 2. The hermetic electric compressor according to claim 1, wherein the hermetic electric compressor is detachably locked through a claw and a locking hole.   The agitation / winding prevention cover has a through hole provided in a central portion thereof, and the drive shaft is penetrated, and the inner peripheral surface or the outer peripheral surface of either the inner peripheral surface or the outer peripheral surface of the lower resin insulating bobbin is provided. The hermetic electric compressor according to claim 1, wherein the hermetic electric compressor is detachably press-fitted through a cylindrical portion.   The agitation / winding prevention cover has a through hole provided in a central portion thereof, and the drive shaft is penetrated, and the inner peripheral surface or the outer peripheral surface of either the inner peripheral surface or the outer peripheral surface of the lower resin insulating bobbin is provided. The hermetic electric compressor according to claim 1, wherein the hermetic electric compressor is detachably screwed through a screw portion.   The agitation / winding prevention cover has an outer diameter closely fitted to an inner peripheral surface of the housing, and a refrigerant and oil flow passage is provided on an outer peripheral portion thereof. The hermetic electric compressor according to any one of 1 to 4.   5. The hermetic electric compressor according to claim 1, wherein the stirring / winding prevention cover has an outer diameter corresponding to an outer diameter of the lower resin insulating bobbin.   The hermetic electric compressor according to any one of claims 1 to 4, wherein the agitation / winding prevention cover has an outer diameter corresponding to an inner diameter of the lower resin-made insulating bobbin. .   The agitation / winding prevention cover is provided at a position below the lower resin insulating bobbin position by a predetermined dimension in a lower space of the motor. Hermetic type electric compressor.   9. The hermetic electric compressor according to claim 1, wherein the agitation / winding prevention cover has a plurality of ribs along a radial direction on a surface thereof.   The agitation / winding prevention cover is formed by forming a cylindrical portion extending downward on either the inner peripheral flange or the outer peripheral flange of the lower resin insulating bobbin. The hermetic electric compressor according to claim 1, wherein the hermetic electric compressor is integrally formed.   The cylindrical portion constituting the agitation / winding prevention cover has a configuration in which an inner peripheral flange of the lower resin insulating bobbin is extended downward, and an outer periphery of the cylindrical portion is lower than an inner peripheral surface of the housing. The hermetic electric compressor according to claim 10, further comprising a horizontal flange portion bent outwardly to be in close contact.   The cylindrical portion constituting the stirring / raising prevention cover has a configuration in which an outer peripheral flange of the lower resin insulating bobbin is extended downward, and includes a horizontal flange portion bent at an inner peripheral side at a lower end portion thereof. The hermetic electric compressor according to claim 10, wherein 11. The inner diameter of the horizontal flange portion provided by bending the cylindrical portion and its lower end portion toward the inner peripheral side is made larger than the outer diameter of the rotor of the motor. The hermetic electric compressor according to any one of 12.

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