JPH0932760A - Scroll compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scroll compressor in which lubricating action to oscillating scroll parts can be achieved regardless of the state such as the temperature of lubricating oil or mixed liquid formed by mixing of liquid refrigerant into lubricating SOLUTION: An oscillating scroll 3 for forming a compression chamber 4 by being engaged with a fixed scroll 2 is provided, and the oscillating scroll 3 is driven by a shaft 9 of an electric motor 8 provided with an oil supplying hole 13 perforating along the axis. An oil pump 15 for supplying lubricating oil in an oil tank 5 to the sliding part of the oscillating scroll 3 through the oil supplying hole 13 is provided on the shaft 9, and acting range of centrifugal force generated by the operation of the oil 15 in the oil tank 5 is restricted by an agitation restraining member 28 surrounding the oil pump 15. The lubricating oil is allowed to flow to the part to which a little action of centrifugal force of the oil tank 5 is applied, and it is allowed to flow into the oil pump without wasteful resistance. Accordingly, the lubricating oil, normally circulates, and inconvenience to be generated by poor lubrication is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll compressor provided with an orbiting scroll and a fixed scroll for compressing a refrigerant such as CFC and used as a compressor such as a refrigerator and an air conditioner.

[0002]

18 to 21 are views showing a conventional scroll compressor, FIG. 18 is a vertical cross-sectional view, and FIG. 19 is an explanation of centrifugal force distribution of liquid in an oil tank during operation of the scroll compressor of FIG. 18 is an enlarged view of the lower end portion of the closed container shown in FIG.
21 is an enlarged view of the lower end of the closed container for explaining the spiral flow of the liquid in the oil tank during the operation of the scroll compressor of FIG.
8 is a diagram for explaining the centrifugal force of the lubricating oil or the mixed liquid, the position head of the lubricating oil or the mixed liquid, and the centrifugal force of the lubricating oil or the mixed liquid and the resultant force of the position head in the oil tank during the operation of the scroll compressor of FIG.

In the figure, 1 is a closed container, 2 is a fixed scroll arranged near the upper end in the closed container 1, 3 is provided below the fixed scroll 2 and engages with the fixed scroll 2 to engage with the compression chamber 4 5 is an oil tank provided at the lower end of the closed container 1, 6 is a bearing frame provided in the closed container 1, and the bearing frame is provided below the orbiting scroll 3 and has an oil return hole 7 Is formed.

Reference numeral 8 denotes an electric motor which is provided in the closed container 1 and arranged below the bearing frame 6, and has a lower end arranged in the oil tank 5 for driving the orbiting scroll 3, a rotor 10, and a rotor 10.
It is composed of a stator 11 and a coil 12.
Reference numeral 13 denotes an oil supply hole penetrating along the axis of the shaft 9,
Reference numeral 14 is a baffle plate, which is annular and is arranged at the lower end of the shaft 9 to cover the oil tank 5, and has a peripheral edge portion attached to the inner peripheral wall surface of the closed container 1 to provide an oil return hole (not shown).

Reference numeral 15 is an oil pump provided at the lower end of the shaft 9 and disposed in the lubricating oil of the oil tank 5, and 16 is a compression assembly composed of the fixed scroll 2, the orbiting scroll 3, the bearing frame 6 and the shaft 9. Three-dimensional, 17 is a suction pipe provided in the closed container 1, 18 is a discharge pipe provided in the closed container 1,
9 is a scroll inlet, 20 is a scroll outlet,
Reference numerals 21 to 23 denote sliding portions associated with the orbiting scroll 3, the bearing frame 6, and the orbiting scroll 3 formed at the ends of the shaft 9, respectively.

Reference numeral 24 denotes a temperature detector which is embedded in the coil end on the upper side of the coil 12 and detects the temperature of the stator 11. Reference numeral 25 denotes a sealed terminal provided on the outer surface of the upper portion of the hermetically sealed container 1, which is a lead wire 26. Is connected to the temperature detector 24. Reference numeral 27 denotes an annular space formed between the inner surface of the closed container 1 and the stator 11.

The conventional scroll compressor is constructed as described above, the electric motor 8 is energized to rotate the shaft 9, and the orbiting scroll 3 is driven. As a result, the refrigerant gas is sucked into the compression chamber 4 from the suction pipe 17 through the suction port 19, and the refrigerant gas compressed by the well-known scroll compression principle is discharged from the discharge pipe 18 through the discharge port 20.

Further, the lubricating oil in the oil tank 5 is sucked by the operation of the oil pump 15 caused by the rotation of the shaft 9, and is supplied to the sliding portions 21 to 23 through the oil supply hole 13. And each sliding part 2
The lubricating oil that lubricates 1 to 23 flows to the oil tank 5 through the oil return hole 7, the space 27, and the oil return hole of the baffle plate 14.

[0009]

In the conventional scroll compressor as described above, the expansion fan selection error and the cooler fan after the defrosting operation are omitted although they are not shown in the drawing, for example, under operating conditions with a low evaporation temperature. When the liquid back operation occurs due to operation delay or the like, that is, when the phenomenon in which the refrigerant gas mixed with the liquid refrigerant returns to the suction pipe 17, a mixed liquid in which the liquid refrigerant is mixed with the lubricating oil in the oil tank 5 is generated. At this time, the viscosity of the oil generally increases as the temperature decreases, so that the temperature of the mixed liquid decreases, the viscosity of the mixed liquid increases, and the mixed liquid becomes a high-viscosity fluid.

As a result, the viscous resistance of the outer peripheral surface of the oil pump 15 increases, the rotational force transmitted to the mixed liquid in the oil tank 5 by the oil pump 15 increases, and the centrifugal force generated in the mixed liquid increases. Therefore, although the lubricating oil returning to the oil tank 5 from the oil return hole 7 of the bearing frame 6 falls to the upper layer in the oil tank 5, the radius is reduced by the centrifugal force generated in the highly viscous mixed liquid in the oil tank 5 shown in FIG. It receives the directional energy and moves to the outer side of the oil tank 5.

Further, since the lubricating oil returning from the oil return hole 7 to the oil tank 5 lubricates the sliding portions 21 to 23, the temperature is high and the oil density is low. Therefore, since the oil density is different from that of the mixed liquid in the oil tank 5, it is difficult to mix them. Furthermore, the centrifugal force of the highly viscous mixed liquid in the oil tank 5 acts radially outward.
This centrifugal force is a force that prevents the lubricating oil returning from the oil return hole 7 to the oil tank 5 from entering the inside of the oil pump 15 from the radial outside of the closed container 1 through the bottom of the closed container 1 by its own weight. It works as shown in.

Therefore, the highly viscous mixed liquid gathers near the tip of the oil pump 15, and the radial centrifugal force generated by the rotation of the oil pump 15 acts, so that the lubricating oil and the mixed liquid are generated inside the oil pump 15. It becomes difficult to enter. Due to such a phenomenon, there is a problem in that the supply of the lubricating oil to the sliding portions 21 to 23 is insufficient and the lubricating action is hindered.

In the operating oil tank 5, the oil pump 1
The centrifugal force generated in the lubricating oil or the mixed liquid by 5 is influenced by the outer shape of the oil pump 15 and has a distribution shown in the figure (a) of FIG. In addition, in the oil tank 5 in operation, the oil pump 1
The position head generated in the lubricating oil or the mixed liquid by 5 is shown in FIG.
The distribution of the figure 1 (b) is 1.

Further, the resultant force between the centrifugal force and the position head generated in the lubricating oil or the mixed liquid by the oil pump 15 in the oil tank 5 in operation has a distribution shown in FIG. 21 (c). Further, point P shown in FIG. 21 is a point where the centrifugal force acting on the lubricating oil or the mixed liquid and the position head are in balance, and the lubricating oil or the mixed liquid is stationary. Then, below the point P, the lubricating oil or the mixed liquid flows toward the oil pump 15, and above the point P, the lubricating oil or the mixed liquid flows toward the peripheral wall of the closed container 1.

In the scroll compressor, when the temperature of the lubricating oil decreases, the rotation of the oil pump 15 has the following effect on the lubricating oil in the oil tank 5. That is, as the oil pump 15 rotates, the oil pump 1
On the outer periphery of 5, the mixed liquid in which the liquid refrigerant is mixed with the lubricating oil in the oil tank 5 is generated, and the mixed liquid in the oil tank 5 is agitated. Then, the mixed liquid rotates in the same direction as the rotation of the oil pump 15 so as to swirl, and the rotating mixed liquid has a centrifugal force directed outward in the radial direction.

As described above, the fact that the mixed liquid has a centrifugal force directed outward in the radial direction is also apparent from the fact that a depression is formed in the center of the mixed liquid surface during operation due to a pressure drop commensurate with the centrifugal force and becomes a hyperbola. is there. At this time, the rotational force of the oil pump 15 is transmitted not only in the radial direction but also in the axial direction due to the viscosity of the mixed liquid, so that the mixed liquid has a rotational force below the lower end of the oil pump 15. .

When the viscosity of the mixed liquid increases as the temperature of the mixed liquid decreases, the shearing resistance of the mixed liquid in contact with the outer peripheral surface of the oil pump 15 increases, and the rotational force of the oil pump 15 is applied to the lubricating oil on the radially outer side of the liquid refrigerant. It is transmitted more efficiently than before mixing, that is, before lowering the temperature. Therefore, the stirring rotational force of the mixed liquid in the oil tank 5 is increased, and the centrifugal force applied to the mixed liquid by the rotation of the oil pump 15 is increased.

Then, the amount of lubricating oil that reaches the suction port of the oil pump 15 decreases, the amount of lubricating oil supplied to each sliding portion 21-23 becomes insufficient, and the bearing load capacity of each sliding portion 21-23 is reduced. descend. Therefore, problems such as wear and seizure occur in the sliding parts 21 to 23. In addition, the point P shown in FIG.
The suction speed of No. 5 decreases, and the amount of lubricating oil supplied to each sliding portion 21-23 decreases.

When the temperature of the lubricating oil is not lowered, the viscosity of the lubricating oil is low, so that the viscous resistance of the mixed liquid in contact with the outer peripheral surface of the oil pump 15 is small and the centrifugal force generated by the rotation of the mixed liquid in the oil tank 5 is small. Is small. For this reason, since the point P shown in FIG. 21 does not descend and the suction speed of the oil pump 15 does not decrease, a required amount of lubricating oil is supplied to each of the sliding portions 21-23.

Further, when the liquid refrigerant is mixed in the lubricating oil in the oil tank 5 and separated into a plurality of phases having different oil concentrations, the dense phase moves downward, but the liquid state is higher than the density of the lubricating oil. In the refrigerant having a high density, the phase having a low oil concentration stays downward. Therefore, the suction position of the oil pump 15 is at the oil tank 5
When it is provided under the oil tank 5, the lubricating oil is sucked from a phase with a low oil concentration below the oil tank 5, so that the lubricating oil is lubricated with a low oil concentration. Therefore, lubrication failure occurs and the bearing load capacity of each of the sliding portions 21 to 23 decreases, causing problems such as seizure.

The present invention has been made in order to solve such a problem, and it is a slide related to an orbiting scroll regardless of the temperature of the mixed liquid in which the lubricating oil or the liquid refrigerant is mixed in the lubricating oil. An object of the present invention is to obtain a scroll compressor in which the lubricating action of the moving part is achieved.

[0022]

In a scroll compressor according to the present invention, a fixed scroll disposed on an upper side in a hermetic container, an orbiting scroll that engages with the fixed scroll to form a compression chamber, and a hermetically sealed scroll An electric motor provided in the container for driving the orbiting scroll, a shaft of the electric motor having an oil supply hole penetrating along the axis, an oil tank provided on the lower side in the closed container, and a lower end of the shaft. And an oil pump that is arranged in the lubricating oil of the oil tank and that supplies the lubricating oil to the sliding portion related to the orbiting scroll through the oil supply hole of the shaft, and is formed in a cylindrical shape inside the lubricating oil of the oil tank. And a stirring suppressing member surrounding the oil pump.

Further, in the scroll compressor according to the present invention, a fixed scroll arranged on the upper side in the closed container, an orbiting scroll which engages with the fixed scroll to form a compression chamber, and a fixed scroll are provided in the closed container. The electric motor for driving the orbiting scroll, the shaft of the electric motor having the oil supply hole penetrating along the axis, the oil tank provided on the lower side in the hermetic container, and the lower end of the shaft. An oil pump that is placed in the lubricating oil of the oil tank and supplies the lubricating oil to the sliding parts related to the orbiting scroll through the oil supply hole, and a cylindrically shaped lower end that is fixed to the bottom surface of the closed container and near the lower end. A passage is provided and is disposed in the lubricating oil, and an agitation suppressing member that surrounds the oil pump is provided.

Further, in the scroll compressor according to the present invention, the fixed scroll disposed on the upper side in the closed container, the orbiting scroll engaging with the fixed scroll to form the compression chamber, and the fixed scroll provided in the closed container. The electric motor for driving the orbiting scroll, the shaft of the electric motor having the oil supply hole penetrating along the axis, the oil tank provided on the lower side in the hermetic container, and the lower end of the shaft. An oil pump that is placed in the lubricating oil of the oil tank and supplies the lubricating oil to the sliding parts related to the orbiting scroll through the oil supply hole, and is formed into a conical cylinder shape similar to the conical shape of the outer surface of the oil pump, An agitation suppression member provided in the oil and surrounding the oil pump is provided.

Further, in the scroll compressor according to the present invention, a fixed scroll disposed on the upper side in the closed container, an orbiting scroll engaging with the fixed scroll to form a compression chamber, and a scroll provided in the closed container. The electric motor for driving the orbiting scroll, the shaft of the electric motor having the oil supply hole penetrating along the axis, the oil tank provided on the lower side in the hermetic container, and the lower end of the shaft. An oil pump that is arranged in the lubricating oil of the oil tank and supplies the lubricating oil to the sliding parts related to the orbiting scroll through the oil supply hole, and the net is formed into a bowl shape, and the opening of the bowl is on the bottom surface of the closed container. An agitation suppression member is provided, which is fixed and is arranged such that the outer surface of the bottom of the bowl faces the lower surface of the oil pump and is provided in the lubricating oil.

Further, in the scroll compressor according to the present invention, a fixed scroll arranged on the upper side in the closed container, an orbiting scroll which engages with the fixed scroll to form a compression chamber, and a fixed scroll are provided in the closed container. The electric motor for driving the orbiting scroll, the shaft of the electric motor having the oil supply hole penetrating along the axis, the oil tank provided on the lower side in the hermetic container, and the lower end of the shaft. An oil pump that is arranged in the lubricating oil of the oil tank and that supplies the lubricating oil to the sliding portion related to the orbiting scroll through the oil supply hole, and the plate surface made of a plate is arranged in the direction along the longitudinal axis of the electric motor. An agitation suppression member is provided across the oil tank, and the agitation suppression member is provided in the lubricating oil so as to face the oil pump with a gap therebetween.

Further, in the scroll compressor according to the present invention, the fixed scroll arranged on the upper side in the closed container, the orbiting scroll engaging with the fixed scroll to form the compression chamber, and the fixed scroll provided in the closed container. The electric motor for driving the orbiting scroll, the shaft of the electric motor having the oil supply hole penetrating along the axis, the oil tank provided on the lower side in the hermetic container, and the lower end of the shaft. Integrated with the oil pump that is placed in the lubricating oil of the oil tank and supplies the lubricating oil to the sliding parts related to the orbiting scroll through the oil supply hole, and the baffle plate that covers the oil tank and whose peripheral edge is attached to the inner wall surface of the closed container. And a stirring suppression member disposed in the lubricating oil so as to face the oil pump.

Further, in the scroll compressor according to the present invention, the fixed scroll arranged on the upper side in the closed container, the orbiting scroll engaging with the fixed scroll to form the compression chamber, and the fixed scroll provided in the closed container. The electric motor for driving the orbiting scroll, the shaft of the electric motor having the oil supply hole penetrating along the axis, the oil tank provided on the lower side in the hermetic container, and the lower end of the shaft. An oil pump that is placed in the lubricating oil of the oil tank and supplies the lubricating oil to the sliding parts related to the orbiting scroll through the oil supply hole, and a pipe body that is provided in the oil tank and has its upper end near the oil surface in the lubricating oil. An agitation suppression member is provided which is opened and descends along the inner wall of the closed container, and the lower end opening is opposed to the lower surface of the oil pump.

Further, in the scroll compressor according to the present invention, a fixed scroll arranged on the upper side in the hermetic container, an orbiting scroll engaging with the fixed scroll to form a compression chamber, and a scroll provided in the hermetic container. The electric motor for driving the orbiting scroll, the shaft of the electric motor having the oil supply hole penetrating along the axis, the oil tank provided on the lower side in the hermetic container, and the lower end of the shaft. An oil pump that is placed in the lubricating oil of the oil tank and supplies the lubricating oil to the sliding part related to the orbiting scroll through the oil supply hole, and a sliding body whose upper end is provided in the oil tank and is related to the orbiting scroll. A stirring restraining member is provided which communicates with an oil return hole of a bearing frame which constitutes a portion, descends along the inner wall of the closed container, and has an opening at the lower end facing the lower surface of the oil pump.

Further, in the scroll compressor according to the present invention, a fixed scroll disposed on the upper side in the closed container, an orbiting scroll which engages with the fixed scroll to form a compression chamber, and a fixed scroll are provided in the closed container. The electric motor for driving the orbiting scroll, the shaft of the electric motor having the oil supply hole penetrating along the axis, the oil tank provided on the lower side in the hermetic container, and the lower end of the shaft. An oil pump that is arranged in the lubricating oil of the oil tank and that supplies the lubricating oil to the sliding portion related to the orbiting scroll through the oil supply hole, and the oil pump that is configured integrally with this oil pump and that is located below the large diameter portion of the oil pump. An agitation suppression member having a small diameter portion formed and having a suction hole provided on the lower surface is provided.

Further, in the scroll compressor according to the present invention, a fixed scroll arranged on the upper side in the closed container, an orbiting scroll which engages with the fixed scroll to form a compression chamber, and a fixed scroll are provided in the closed container. The electric motor for driving the orbiting scroll, the shaft of the electric motor having the oil supply hole penetrating along the axis, the oil tank provided on the lower side in the hermetic container, and the lower end of the shaft. An oil pump which is arranged in the lubricating oil of the oil tank and supplies the lubricating oil to the sliding portion related to the orbiting scroll through the oil supply hole, an agitation suppression member provided in the oil tank, and an intake hole provided on the lower surface A small diameter member protruding from the lower end of the pump is provided.

In the scroll compressor configured as described above, the working range of centrifugal force due to the operation of the oil pump in the oil tank is restricted within the stirring suppressing member. Then, the lubricating oil supplied to the sliding portion related to the orbiting scroll circulates to the outside of the stirring suppression member of the oil tank where centrifugal force due to the operation of the oil pump does not act, and enters the oil pump without extra resistance. To do.

Further, in the scroll compressor configured as described above, the working range of the centrifugal force due to the operation of the oil pump in the oil tank is restricted within the stirring suppressing member whose lower end is fixed to the bottom surface of the closed container. Then, the lubricating oil supplied to the sliding portion related to the orbiting scroll circulates to the outside of the stirring suppression member of the oil tank where centrifugal force due to the operation of the oil pump does not act, and enters the oil pump without extra resistance. To do.

Further, in the scroll compressor having the above-described structure, the range of action of the centrifugal force due to the operation of the oil pump in the oil tank is a conical cylindrical shape similar to the conical shape of the outer surface of the oil pump. Constrained within the member. And
The lubricating oil supplied to the sliding portion associated with the orbiting scroll circulates outside the agitation suppression member of the oil tank in which centrifugal force due to the operation of the oil pump does not act, and enters the oil pump without extra resistance.

Further, in the scroll compressor constructed as described above, the working range of the centrifugal force due to the operation of the oil pump in the oil tank is restricted to the outside of the stirring suppressing member in which the net is shaped like a bowl. Then, the lubricating oil supplied to the sliding portion related to the orbiting scroll is circulated into the stirring suppression member of the oil tank where centrifugal force due to the operation of the oil pump does not act, and enters the oil pump without extra resistance. To do.

Further, in the scroll compressor constructed as described above, the action of the centrifugal force due to the operation of the oil pump in the oil tank is such that the plate surface is arranged in the direction along the longitudinal axis of the electric motor and the oil tank is formed. It is suppressed by the stirring suppressing member provided across the inside. Then, the lubricating oil supplied to the sliding portion related to the orbiting scroll is circulated to the oil tank in which the action of the centrifugal force due to the operation of the oil pump is suppressed, and enters the oil pump without extra resistance.

Further, in the scroll compressor constructed as described above, the range of action of the centrifugal force due to the operation of the oil pump in the oil tank is suppressed by the stirring suppressing member which is integrally formed with the baffle plate covering the oil tank. . And
Lubricating oil supplied to the sliding part related to the orbiting scroll is circulated to the agitation suppression member corresponding part where the action of the centrifugal force due to the operation of the oil pump in the oil tank is suppressed, and the lubricating oil is stored in the oil pump without extra resistance. Enter.

Further, in the scroll compressor configured as described above, the lubricating oil supplied to the sliding portion associated with the orbiting scroll is agitated while being isolated from the action of centrifugal force due to the operation of the oil pump in the oil tank. Circulates through the tube of the suppression member,
Enter the oil pump without extra resistance.

Further, in the scroll compressor configured as described above, the lubricating oil supplied to the sliding portion associated with the orbiting scroll has the bearing frame whose upper end constitutes the sliding portion associated with the orbiting scroll. The fluid is circulated through the tube of the agitation suppressing member, which is connected to the oil return hole of the oil tank and isolated from the action of centrifugal force due to the operation of the oil pump of the oil tank, and enters the oil pump without extra resistance.

Further, in the scroll compressor configured as described above, the action of the centrifugal force due to the operation of the oil pump in the oil tank is caused by the action of centrifugal force of the small diameter stirring suppressing member formed below the large diameter portion of the oil pump. Decrease in place. Then, the lubricating oil supplied to the sliding portion related to the orbiting scroll is circulated to the side face-to-face position of the stirring suppressing member where the centrifugal force due to the operation of the oil pump is small, and is circulated in the oil pump without extra resistance. enter in.

Further, in the scroll compressor constructed as described above, the action of centrifugal force due to the operation of the oil pump in the oil tank is reduced at the side-to-side facing portion of the small diameter member formed below the large diameter portion of the oil pump. To do. Then, the lubricating oil supplied to the sliding part related to the orbiting scroll is circulated to the side face-to-face location of the small diameter member where the centrifugal force due to the operation of the oil pump is small, and the centrifugal force is generated due to the operation of the oil pump by the stirring suppressing member. Combined with the restriction of the range of action of force, it enters the oil pump without extra resistance.

[0042]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. 1 and 2 are views showing an embodiment of the present invention. FIG. 1 is a longitudinal sectional view and FIG. 2 is an enlarged view of a lower end portion of the closed container of FIG. In the figure, 1 is a closed container, 2 is a fixed scroll arranged near the upper end in the closed container 1, and 3 is provided below the fixed scroll 2 and engages with the fixed scroll 2 to form a compression chamber 4. The orbiting scroll 5 is an oil tank provided at the lower end of the airtight container 1, 6 is a bearing frame provided in the airtight container 1, and an oil return hole 7 is formed and is arranged below the orbiting scroll 3. There is.

Reference numeral 8 denotes an electric motor provided in the closed container 1 and arranged below the bearing frame 6, which drives the orbiting scroll 3 and has a lower end arranged in the oil tank 5, a shaft 9, a rotor 10, a stator 11 and It is constituted by the coil 12. 1
Reference numeral 3 designates an oil supply hole penetrating along the axis of the shaft 9,
Reference numeral 4 is a baffle plate, which is annular and is arranged at the lower end of the shaft 9 to cover the oil tank 5, and has a peripheral edge portion attached to the inner peripheral wall surface of the closed container 1 to provide an oil return hole (not shown).

Reference numeral 15 is an oil pump provided at the lower end of the shaft 9 and arranged in the lubricating oil of the oil tank 5, and 16 is a compression assembly composed of the fixed scroll 2, the orbiting scroll 3, the bearing frame 6 and the shaft 9. Three-dimensional, 17 is a suction pipe provided in the closed container 1, 18 is a discharge pipe provided in the closed container 1,
9 is a scroll inlet, 20 is a scroll outlet,
Reference numerals 21 to 23 denote sliding portions associated with the orbiting scroll 3, the bearing frame 6, and the orbiting scroll 3 formed at the ends of the shaft 9, respectively.

Reference numeral 24 is a temperature detector which is embedded in the coil end above the coil 12 and detects the temperature of the stator 11. Reference numeral 25 is a sealed terminal provided on the outer surface of the upper portion of the hermetically sealed container 1, and a lead wire 26. Is connected to the temperature detector 24. Reference numeral 27 denotes an annular space formed between the inner surface of the closed container 1 and the stator 11.

Reference numeral 28 denotes a stirring suppressing member, which is formed in a cylindrical shape and is arranged so as to surround the oil pump 15 and has the oil pump 1 on the bottom surface.
The lower end of 5 forms a gap and is arranged in a fitted state.
Reference numeral 29 denotes an attachment for mounting the stirring suppression member 28 on the closed container 1, one end of which is fixed to the stirring suppression member 28 by welding and the other end thereof is fixed to the inner wall of the closed container 1 by welding. Reference numeral 30 is an oil passage formed between the bottom surface of the stirring suppressing member 28 and the bottom surface inside the closed container 1.

In the scroll compressor configured as described above, the electric motor 8 is energized to rotate the shaft 9 and drive the orbiting scroll 3. As a result, the suction pipe 17
Refrigerant gas is sucked into the compression chamber 4 through the suction port 19 from
The refrigerant gas compressed by the well-known scroll compression principle is discharged from the discharge pipe 18 through the discharge port 20.

Further, the lubricating oil in the oil tank 5 is sucked by the operation of the oil pump 15 due to the rotation of the shaft 9, and is supplied to the sliding portions 21 to 23 through the oil supply hole 13. And each sliding part 2
The lubricating oil that lubricated 1 to 23 is circulated to the oil tank 5 through the oil return hole 7, the space 27, and the oil return hole of the baffle plate 14 through the outside of the agitation suppression member 28 by the route of arrow A shown in FIG.
Then, it is sucked into the oil pump 15 via the oil passage 30.

The range of action of the centrifugal force generated by the operation of the oil pump 15 is restricted within the stirring suppressing member 28 as indicated by the arrow B in FIG. As a result, the centrifugal force due to the operation of the oil pump 15 does not reach the entire oil tank 5, and the lubricating oil that lubricates the sliding portions 21 to 23 enters the oil pump 15 without extra resistance.

Therefore, the lubricating oil is normally circulated to the sliding portions 21 to 23 regardless of the conditions such as the temperature and the viscosity of the lubricating oil or the mixed liquid in which the lubricating oil or the liquid refrigerant is mixed in the lubricating oil. It is possible to prevent the occurrence of troubles such as seizure due to the decrease in the bearing load capacity of each of the sliding portions 21 to 23 that is supplied.

Embodiment 2 FIG. 3 to 5 are views showing another embodiment of the present invention. FIG. 3 is a longitudinal sectional view, FIG. 4 is an enlarged view of a lower end portion of the closed container of FIG. 3, and FIG. 5 is a stirring suppressing member of FIG. It is an expansion perspective view. In the figure, the same reference numerals as those in FIG. 1 and FIG. 2 indicate corresponding parts, and 28 is a stirring suppressing member, which is formed in a cylindrical shape and is arranged so as to surround the oil pump 15, and whose lower end is welded to the bottom surface of the closed container 1 by welding. An oil passage 30 that is fixed and is formed by a notch provided at the lower end and communicates with the oil tank 5 is provided at the bottom of the closed container 1.

In the scroll compressor configured as described above, the agitation suppression member 28 is also provided and the oil pump 1
The action range of the centrifugal force generated by the operation of No. 5 is restricted within the stirring suppressing member 28 as indicated by an arrow B shown in FIG. Therefore, although detailed description is omitted, it is apparent that the same effects as those of the embodiments of FIGS. 1 and 2 can be obtained in the embodiments of FIGS.

In the embodiment shown in FIGS. 3 to 5, the lubricating oil that lubricates the sliding portions 21 to 23 passes through the oil return hole 7, the space 27 and the oil return hole of the baffle plate 14 and then the arrow shown in FIG. By the route A, the oil is circulated to the oil tank 5 via the outside of the agitation suppression member 28, and then through the bottom surface of the oil tank 5 and the oil passage 30.
Inhaled to 5.

Embodiment 3 FIG. 6 and 7 are also views showing another embodiment of the present invention. FIG. 6 is a longitudinal sectional view, and FIG. 7 is an enlarged view of the lower end portion of the closed container of FIG. In the figure, the same reference numerals as those in FIGS. 1 and 2 indicate corresponding parts, and 28 is a stirring suppressing member,
It is formed in a conical cylinder shape similar to the conical shape of the outer surface of the oil pump 15, and forms a space to surround the oil pump 15 and a through hole facing the lower surface of the oil pump 15 is provided on the bottom surface.

In the scroll compressor constructed as described above, the stirring suppressing member 28 is provided and the oil pump 1 is provided.
The action range of the centrifugal force generated by the operation of 5 is restricted within the stirring suppressing member 28. Therefore, although detailed description is omitted, it is apparent that the same effects as those of the embodiments of FIGS. 1 and 2 can be obtained in the embodiments of FIGS. 6 and 7.

In the embodiment of FIGS. 6 and 7, the mixed liquid below the lower end of the oil pump 15 is isolated from the oil pump 15. For this reason, the influence of the centrifugal force generated by the operation of the oil pump 15 is minimized, and the lubricating oil is not pumped by the oil pump 15.
Enter the area more smoothly. Therefore, the lubricating oil can be satisfactorily supplied to the sliding portions 21 to 23, and the sliding portions 21
It is possible to prevent problems such as seizure due to a decrease in the bearing load capacity of Nos. 23 to 23.

Further, even if the lower end portion of the stirring suppressing member 28 in the embodiment of FIGS. 6 and 7 is formed into a hemispherical shape, the same effects as the stirring suppressing member 28 shown in FIGS. 6 and 7 can be obtained. Similar effects can be obtained.

Example 4. 8 and 9 are also views showing another embodiment of the present invention. FIG. 8 is a longitudinal sectional view and FIG. 9 is an enlarged view of a lower end portion of the closed container of FIG. In the figure, the same reference numerals as those in FIGS. 1 and 2 indicate corresponding parts, and 28 is a stirring suppressing member,
The net is formed into a bowl shape, the opening of the bowl is fixed to the inner bottom surface of the closed container 1 by welding, and the outer surface of the bottom of the bowl is the oil pump 15
Are formed facing each other with a small gap formed on the lower surface thereof.

In the scroll compressor constructed as described above, the stirring suppressing member 28 in which the net is shaped like a bowl is formed.
Is provided, and the stirring suppressing member 28 is the oil pump 1 for the mixed liquid.
It resists rotation due to the centrifugal force generated by the operation of 5. Therefore, the rotational speed of the mixed liquid in the stirring suppressing member 28 due to the centrifugal force is reduced. And the oil pump 1
The action range of the centrifugal force generated by the operation of No. 5 is restricted outside the stirring suppressing member 28 as indicated by an arrow B shown in FIG.

As a result, the rotational flow of the mixed liquid due to the centrifugal force generated by the operation of the oil pump 15 does not reach the stirring suppressing member 28. Therefore, the lubricating oil that has lubricated the sliding portions 21 to 23 enters the oil pump 15 without excessive resistance as shown by the arrow A in FIG. Therefore, although detailed description is omitted, it is apparent that the same effects as those of the embodiments of FIGS. 1 and 2 can be obtained in the embodiments of FIGS. 8 and 9.

The shape of the stirring suppressing member 28 made of a net in the embodiment of FIGS. 8 and 9 is similar to that of the stirring suppressing member 28 of FIG. 3 described above, and is arranged so as to surround the oil pump 15. Even with the above structure, it is possible to obtain the same action as that obtained with the stirring suppressing member 28 shown in FIGS. 8 and 9.

Embodiment 5 FIG. 10 and 11 are also views showing another embodiment of the present invention, in which FIG. 10 is a longitudinal sectional view and FIG. 11 is an enlarged perspective view of the stirring suppressing member of FIG. In the figure, the same reference numerals as those in FIG. 1 and FIG. 2 indicate corresponding portions, and 28 is a stirring suppressing member, which is made of a plate body and whose plate surface is arranged in the direction along the length of the shaft 9 so as to cross the inside of the oil tank 5 in the radial direction. It is arranged. A gap is formed between the closed container 1 and the closed container 1, a gap is formed in the oil pump 15 at the center, and a notch is formed opposite to the closed end. The part is fixed to the bottom surface of the closed container 1 by welding.

In the scroll compressor constructed as described above, the stirring suppressing material 28 made of a plate is arranged in a direction orthogonal to the rotational flow generated by the operation of the oil pump 15 of the mixed liquid. And the oil pump 15 for the mixed liquid
It becomes a resistance against the rotating flow due to the operation of. Therefore, the centrifugal force and the rotation speed of the mixed liquid in the stirring suppressing member 28 are reduced.

Therefore, the lubricating oil that lubricates the sliding portions 21 to 23 and flows into the oil tank 5 enters into the oil pump 15 without receiving any particular resistance. Therefore, although detailed description is omitted, it is apparent that the same effects as those of the embodiments of FIGS. 1 and 2 can be obtained in the embodiments of FIGS. 10 and 11.

The stirring suppressing member 28 made of a plate in the embodiment shown in FIG. 10 and FIG.
By arranging at a suitable position or posture that suppresses the rotational flow generated by the operation of 5, or by installing a plurality of stirring suppressing members 28 made of plate bodies in such a state,
The rotational flow generated by the operation of the oil pump 15 of the mixed liquid is suppressed. Even with such a configuration, FIG. 10 and FIG.
It is possible to obtain the same action as that obtained by the stirring suppressing member 28 shown in FIG.

Embodiment 6 FIG. FIG. 12 is also a vertical sectional view showing another embodiment of the present invention. In the drawing, the same reference numerals as those in FIGS. 1 and 2 indicate corresponding parts, and 28 is a stirring suppressing member, which is integrally formed with the baffle plate 14 by sheet metal drawing or the like. Also in the scroll compressor configured as described above, the stirring suppressing member 28 is provided and the oil pump 1
The action range of the centrifugal force generated by the operation of 5 is restricted within the stirring suppressing member 28.

Therefore, although detailed description is omitted, FIG.
It is obvious that the same effects as those of the embodiments of FIGS. 1 and 2 can be obtained in the second embodiment. Further, in the embodiment of FIG. 12, since the stirring suppressing member 28 is manufactured integrally with the baffle plate 14, the number of parts is reduced and the manufacturing cost can be reduced.

Embodiment 7 FIG. FIG. 13 is also a vertical sectional view showing another embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 1 and FIG. 2 indicate the corresponding parts, and 28 is a stirring suppressing member, which is made of a tubular body and has an upper end opened near the oil surface in the lubricating oil of the oil tank 5,
It is provided so as to descend along the inner wall of the closed container 1 and fixed to the closed container 1 by welding, and the opening at the lower end is the oil pump 1
5 is arranged so as to face the lower surface.

Also in the scroll compressor having the above-mentioned structure, the stirring suppressing member 28 is provided and each sliding portion 2 is provided.
The lubricating oil that lubricates the oil tanks 1 to 23 and flows into the oil tank 5 is from the upper layer of the oil tank 5 which is less affected by the trouble caused by the rotational flow generated by the operation of the oil pump 15 of the mixed liquid, that is, the oil tank 5
Is guided from the upper end opening of the stirring suppressing member 28 arranged near the oil surface of the lubricating oil to the lower end opening facing the lower surface of the oil pump 15.

As a result, the lubricating oil that lubricates the sliding portions 21 to 23 is not subjected to the resistance due to the rotational flow generated by the operation of the oil pump 15 of the mixed liquid, and the oil pump 15
Enter inside. Therefore, although detailed description is omitted, it is obvious that the embodiment of FIG. 13 can obtain the same operation as that of the embodiment of FIGS.

Embodiment 8 FIG. FIG. 14 is also a vertical sectional view showing another embodiment of the present invention. In the drawings, the same reference numerals as those in FIGS. 1 and 2 indicate corresponding parts, and 28 is a stirring suppressing member, which is made of a tubular body and communicates with the oil return hole 7 of the bearing frame 6 at its upper end, along the inner wall of the closed container 1. Closed container 1
Is fixed to the oil pump 15 by welding.
Is arranged to face the lower surface of the.

Also in the scroll compressor configured as described above, the stirring suppressing member 28 is provided, and the lubricating oil that lubricates the sliding portions 21 to 23 flows down in the stirring suppressing member 28 by its own weight and is mixed. The liquid is guided to the opening of the lower end of the stirring suppressing member 28 facing the lower surface of the oil pump 15 without being affected by the rotational flow generated by the operation of the oil pump 15.

As a result, the lubricating oil that has lubricated the sliding portions 21 to 23 enters the oil pump 15 without the resistance of the rotary flow generated by the operation of the oil pump 15 of the mixed liquid.
Therefore, although detailed description is omitted, it is obvious that the embodiment of FIG. 14 can also obtain the same operation as that of the embodiment of FIGS.

Embodiment 9 FIG. 15 and 16 are also views showing another embodiment of the present invention. FIG. 15 is a longitudinal sectional view and FIG. 16 is an enlarged view of the lower end portion of the closed container of FIG. In the figure,
The same reference numerals as those in FIGS. 1 and 2 indicate corresponding portions, and 28 is a stirring suppressing member, which is formed integrally with the oil pump 15 and includes a small-diameter portion formed below the large-diameter portion of the oil pump 15. A suction hole is provided.

In the scroll compressor configured as described above, the stirring suppressing member 28 having a small diameter portion formed below the large diameter portion of the oil pump 15 is provided, and the operation of the oil pump 15 converts the mixture into a mixed liquid. The generated centrifugal force is reduced at the side facing surface of the stirring suppressing member 28. Therefore,
Although detailed description is omitted, it is apparent that the same effects as those of the embodiments of FIGS. 1 and 2 can be obtained in the embodiments of FIGS. 15 and 16.

Further, in the embodiment of FIGS. 15 and 16, the oil pump 15 having a large diameter portion can obtain a required pumping capacity. In addition, by reducing the centrifugal force generated by the operation of the oil pump 15 at the location of the agitation suppression member 28, the required amount of lubricating oil does not have to rise above the bottom end of the agitation suppression member 28 above the bottom surface of the closed container 1. Can be entered.

Note that, as shown in FIG. 21, the centrifugal force is generated in the mixed liquid in the oil tank 5 by the operation of the oil pump 15. The sliding parts 21 to 2 against the obstacle caused by the centrifugal force.
As a means for making the lubricating oil that has lubricated No. 3 circulate to the oil tank 5 through the oil returning hole 7, the space 27 and the oil returning hole of the baffle plate 14 to be easily sucked into the oil pump 15, It is possible to reduce the centrifugal force of the liquid.

That is, there is a means for ensuring the oil passage by reducing the centrifugal force on the outer side of the oil pump 15 in the radial direction and on the bottom surface of the closed container 1. Specifically, there is a configuration in which the diameter of the oil pump 15 is reduced and the lower end position of the oil pump 15 is raised from the bottom surface of the closed container 1. However, in such a configuration, sufficient pumping performance cannot be obtained by reducing the diameter of the oil pump, and raising the lower end of the oil pump 15 causes the amount of lubricating oil accumulated from the lower end of the oil pump 15 to the bottom surface of the closed container 1. Is increased,
When the minimum required amount of lubricating oil is increased and the oil level is lowered, there is a risk of insufficient supply of the amount of lubricating oil to the sliding portions 21-23.

With respect to such a fear, FIG. 15 and FIG.
In the embodiment, the oil pump 1 in which the oil pump 15 has a step is formed.
A centrifugal force is generated by the stirring suppressing member 28 having a diameter smaller than the outer diameter of No. 5. Therefore, the distribution of the centrifugal force is reduced near the lower end of the stirring suppressing member 28, and the influence of the centrifugal force on the lubricating oil is reduced. Therefore, the lubricating oil easily enters the oil pump 15, and the lubricating oil in the oil tank 5 can be sufficiently supplied to the oil pump 15.

Then, the lubricating oil is normally supplied to the sliding portions 21 to 23, and the occurrence of troubles such as seizure due to the reduction of the bearing load capacity of the sliding portions 21 to 23 is prevented. be able to. The stirring suppressing member 28 can be appropriately manufactured integrally with the oil pump 15 or separately from the oil pump 15 by cutting, sheet metal drawing, or the like.

Example 10. FIG. 17 is also a vertical sectional view showing another embodiment of the present invention. In the figures, FIG. 1 and FIG.
The same reference numerals denote corresponding parts, 15 is an oil pump in which a small diameter member 31 is projected near the lower end, 28 is a stirring suppressing member, and surrounds the oil pump 15 formed in a cylindrical shape and including the small diameter member 31. The lower end of the small diameter portion 31 is arranged in a fitted state with a gap formed on the bottom surface.

In the scroll compressor configured as described above, the agitation suppressing member 28 is also provided and the oil pump 1
The action range of the centrifugal force generated by the operation of 5 is restricted within the stirring suppressing member 28. Therefore, although detailed description is omitted, it is clear that the embodiment of FIG. 17 can also obtain the same operation as that of the embodiment of FIGS.

Further, in the embodiment of FIG. 17, the centrifugal force generated by the operation of the oil pump 15 is small at the portion corresponding to the side surface of the small diameter member 31 of the oil pump 15, and the rotational flow of the mixed liquid generated by the operation of the oil pump 15 is small. The impact is reduced.
Therefore, the lubricating oil smoothly enters the oil pump 15 in combination with the function of restricting the action range of the centrifugal force generated by the operation of the oil pump 15 by the stirring suppressing member 28. As a result, the lubricating oil is normally supplied to the sliding portions 21 to 23, and it is possible to prevent the occurrence of problems such as seizure due to the reduction of the bearing load capacity of the sliding portions 21 to 23. it can.

[0084]

As described above, according to the present invention, the fixed scroll disposed on the upper side in the closed container and the orbiting scroll engaging with the fixed scroll to form the compression chamber,
An electric motor provided in the closed container for driving the orbiting scroll, a shaft of the electric motor having an oil supply hole penetrating along the axis, an oil tank provided on the lower side in the closed container, and a shaft An oil pump provided at the lower end and arranged in the lubricating oil of the oil tank to supply the lubricating oil to the sliding portion related to the orbiting scroll through the oil supply hole of the shaft, and a cylindrically-formed oil pump in the lubricating oil of the oil tank. And an agitation suppression member provided around the oil pump.

As a result, the working range of the centrifugal force due to the operation of the oil pump in the oil tank is restricted within the stirring suppressing member. Then, the lubricating oil supplied to the sliding portion related to the orbiting scroll circulates to the outside of the stirring suppression member of the oil tank where centrifugal force due to the operation of the oil pump does not act, and enters the oil pump without extra resistance. To do. Therefore, regardless of the temperature, viscosity, etc. of the mixed liquid in which the lubricating oil circulates smoothly and the lubricating oil or the liquid refrigerant is mixed with the lubricating oil, the lubricating oil is normally supplied to the sliding parts related to the orbiting scroll. Thus, there is an effect of preventing the occurrence of a defect due to insufficient lubrication of the sliding portion.

Further, as described above, this occurrence is formed in a cylindrical shape, the lower end is fixed to the bottom surface of the closed container, the oil passage is provided near the lower end, and the oil passage is arranged in the lubricating oil to surround the oil pump. The stirring suppressing member is provided. As a result, the range of action of centrifugal force due to the operation of the oil pump in the oil tank is restricted within the stirring suppressing member whose lower end is fixed to the bottom surface of the closed container. Then, the lubricating oil supplied to the sliding portion related to the orbiting scroll circulates to the outside of the stirring suppression member of the oil tank where centrifugal force due to the operation of the oil pump does not act, and enters the oil pump without extra resistance. To do.

Therefore, regardless of the temperature, viscosity, etc. of the mixed liquid in which the lubricating oil circulates smoothly and the lubricating oil or the liquid refrigerant is mixed with the lubricating oil, the lubricating oil is transferred to the sliding portion related to the orbiting scroll. It is normally supplied, and it is effective in preventing the occurrence of defects due to insufficient lubrication of sliding parts.

Further, as described above, the present invention is provided with the stirring suppressing member which is formed in a conical cylindrical shape similar to the conical shape of the outer surface of the oil pump and which is provided in the lubricating oil and surrounds the oil pump. Is. As a result, the range of action of the centrifugal force due to the operation of the oil pump in the oil tank is restricted within the stirring suppressing member formed in a conical cylindrical shape similar to the conical shape of the outer surface of the oil pump. Then, the lubricating oil supplied to the sliding portion related to the orbiting scroll circulates to the outside of the stirring suppression member of the oil tank where centrifugal force due to the operation of the oil pump does not act, and enters the oil pump without extra resistance. To do.

Therefore, regardless of the conditions such as the temperature and viscosity of the mixed liquid in which the lubricating oil circulates smoothly and the lubricating oil or the liquid refrigerant is mixed with the lubricating oil, the lubricating oil is transferred to the sliding portion related to the orbiting scroll. It is normally supplied, and it is effective in preventing the occurrence of defects due to insufficient lubrication of sliding parts.

As described above, according to the present invention, the net is formed in a bowl shape, the opening of the bowl is fixed to the inner bottom surface of the closed container, and the outer surface of the bottom of the bowl is arranged to face the lower surface of the oil pump. A stirring suppression member provided in the lubricating oil is provided. As a result, the range of action of the centrifugal force due to the operation of the oil pump in the oil tank is restricted to the outside of the stirring suppressing member formed by forming the net into a bowl shape. Then, the lubricating oil supplied to the sliding portion related to the orbiting scroll is circulated into the stirring suppression member of the oil tank where centrifugal force due to the operation of the oil pump does not act, and enters the oil pump without extra resistance. To do.

Therefore, the lubricating oil circulates smoothly to the sliding portion related to the orbiting scroll regardless of the temperature, viscosity, etc. of the mixed liquid in which the lubricating oil or the liquid refrigerant is mixed in the lubricating oil. It is normally supplied, and it is effective in preventing the occurrence of defects due to insufficient lubrication of sliding parts.

Further, as described above, the present invention is constituted by a plate body, and the plate surface is arranged in the direction along the longitudinal axis of the electric motor and provided across the oil tank so as to face the oil pump with a gap formed therebetween. And a stirring suppression member provided in the lubricating oil. As a result, the action of the centrifugal force due to the operation of the oil pump in the oil tank is suppressed by the stirring suppressing member that is formed of a plate and that is arranged in the direction along the longitudinal direction of the shaft of the electric motor and that is provided across the inside of the oil tank. . Then, the lubricating oil supplied to the sliding portion related to the orbiting scroll is circulated to the oil tank in which the action of the centrifugal force due to the operation of the oil pump is suppressed, and enters the oil pump without extra resistance.

Therefore, regardless of the conditions such as the temperature and the viscosity of the mixed liquid in which the lubricating oil circulates smoothly and the lubricating oil or the liquid refrigerant is mixed with the lubricating oil, the lubricating oil is transferred to the sliding portion related to the orbiting scroll. It is normally supplied, and it is effective in preventing the occurrence of defects due to insufficient lubrication of sliding parts.

Further, as described above, the present invention is constructed integrally with the baffle plate whose peripheral portion covers the oil tank and is attached to the inner peripheral wall surface of the closed container, is provided in the lubricating oil, and faces the oil pump. The agitation suppression member arranged is provided. As a result, the range of action of the centrifugal force due to the operation of the oil pump in the oil tank is suppressed by the stirring suppression member that is configured integrally with the baffle plate that covers the oil tank. Then, the lubricating oil supplied to the sliding portion related to the orbiting scroll is circulated to a portion corresponding to the stirring suppression member where the action of the centrifugal force due to the operation of the oil pump in the oil tank is suppressed, and the lubricating oil is supplied without extra resistance. Enter the pump.

Therefore, regardless of the conditions such as the temperature and viscosity of the mixed liquid in which the lubricating oil circulates smoothly and the lubricating oil or the liquid refrigerant is mixed with the lubricating oil, the lubricating oil is transferred to the sliding portion related to the orbiting scroll. It is normally supplied, and it is effective in preventing the occurrence of defects due to insufficient lubrication of sliding parts. Moreover, since the stirring suppressing member is integrally formed with the baffle plate,
The number of parts is reduced, which has the effect of reducing manufacturing costs.

Further, as described above, the present invention is made of a tubular body and is provided in an oil tank, the upper end of which opens near the oil level in the lubricating oil, and descends along the inner wall of the hermetically sealed container to open the lower end of the opening. Is provided with a stirring suppressing member arranged so as to face the lower surface of the oil pump. As a result, the lubricating oil supplied to the sliding portion related to the orbiting scroll circulates through the tube of the stirring suppressing member, which is isolated from the effect of the centrifugal force due to the operation of the oil pump in the oil tank, and causes unnecessary resistance. Without entering the oil pump.

Therefore, the lubricating oil circulates smoothly to the sliding portion related to the orbiting scroll regardless of the temperature, viscosity, etc. of the mixed liquid in which the lubricating oil or the liquid refrigerant is mixed with the lubricating oil. It is normally supplied, and it is effective in preventing the occurrence of defects due to insufficient lubrication of sliding parts.

Further, as described above, the present invention communicates with the oil return hole of the bearing frame, which is formed of a tubular body and is provided in the oil tank, and whose upper end constitutes the sliding portion related to the orbiting scroll, and is connected to the closed container. An agitation suppressing member is provided so as to descend along the inner wall and the lower end opening is opposed to the lower surface of the oil pump. As a result, the lubricating oil supplied to the sliding portion related to the orbiting scroll communicates with the oil return hole of the bearing frame whose upper end constitutes the sliding portion related to the orbiting scroll, and the oil pump of the oil tank It circulates through the tube of the agitation suppressing member, which is isolated from the action of centrifugal force, and enters into the oil pump without extra resistance.

Therefore, regardless of the conditions such as the temperature and the viscosity of the mixed liquid in which the lubricating oil circulates smoothly and the lubricating oil or the liquid refrigerant is mixed in the lubricating oil, the lubricating oil is transferred to the sliding portion related to the orbiting scroll. It is normally supplied, and it is effective in preventing the occurrence of defects due to insufficient lubrication of sliding parts.

Further, as described above, the present invention comprises the agitation suppressing member which is integrally formed with the oil pump and which has the small diameter portion formed below the large diameter portion of the oil pump and has the suction hole on the lower surface. Is provided. As a result, the action of centrifugal force due to the operation of the oil pump in the oil tank is reduced at the side-to-side facing portions of the small-diameter stirring suppressing member formed below the large-diameter portion of the oil pump. Then, the lubricating oil supplied to the sliding portion related to the orbiting scroll is circulated to the side face-to-face position of the stirring suppressing member where the centrifugal force due to the operation of the oil pump is small, and is circulated in the oil pump without extra resistance. enter in.

Therefore, regardless of the conditions such as the temperature and viscosity of the mixed liquid in which the lubricating oil circulates smoothly and the lubricating oil or the liquid refrigerant is mixed with the lubricating oil, the lubricating oil is transferred to the sliding portion related to the orbiting scroll. It is normally supplied, and it is effective in preventing the occurrence of defects due to insufficient lubrication of sliding parts.

Further, as described above, the present invention is provided in the closed container, and the fixed scroll disposed on the upper side in the closed container, the swing scroll which engages with the fixed scroll to form the compression chamber, and the closed scroll. Motor for driving the orbiting scroll, a shaft of the motor having an oil supply hole penetrating along the axis, an oil tank provided on the lower side in the closed container, and an oil tank provided on the lower end of the shaft. Oil pump which is arranged in the lubricating oil and supplies the lubricating oil to the sliding portion related to the orbiting scroll through the oil supply hole, the stirring suppressing member provided in the oil tank, and the suction hole provided on the lower surface of the oil pump. And a small-diameter member protruding from the lower end of the.

As a result, the action of centrifugal force due to the operation of the oil pump in the oil tank is reduced at the side-to-side facing portions of the small diameter member formed below the large diameter portion of the oil pump. Then, the lubricating oil supplied to the sliding portion related to the orbiting scroll circulates to the side face-to-face location of the small diameter member where the centrifugal force due to the operation of the oil pump is small, and is generated by the operation of the oil pump by the stirring suppressing member. Combined with the restriction function of the action range of centrifugal force, it enters the oil pump without extra resistance.

Therefore, regardless of the conditions such as the temperature and the viscosity of the mixed liquid in which the lubricating oil circulates smoothly and the lubricating oil or the liquid refrigerant is mixed with the lubricating oil, the lubricating oil is transferred to the sliding portion related to the orbiting scroll. It is normally supplied, and it is effective in preventing the occurrence of defects due to insufficient lubrication of sliding parts.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a first embodiment of the present invention.

FIG. 2 is an enlarged view of a lower end portion of the closed container in FIG.

FIG. 3 is a vertical sectional view showing a second embodiment of the present invention.

FIG. 4 is an enlarged view of a lower end portion of the closed container of FIG.

5 is an enlarged perspective view of the stirring suppressing member of FIG.

FIG. 6 is a vertical sectional view showing a third embodiment of the present invention.

7 is an enlarged view of a lower end portion of the closed container of FIG.

FIG. 8 is a vertical sectional view showing Embodiment 4 of the present invention.

9 is an enlarged view of the lower end of the closed container of FIG.

FIG. 10 is a vertical sectional view showing Embodiment 5 of the present invention.

11 is an enlarged perspective view of the stirring suppressing member of FIG.

FIG. 12 is a vertical sectional view showing Embodiment 6 of the present invention.

FIG. 13 is a vertical sectional view showing Embodiment 7 of the present invention.

FIG. 14 is a vertical sectional view showing an eighth embodiment of the present invention.

FIG. 15 is a vertical sectional view showing Embodiment 9 of the present invention.

16 is an enlarged view of the lower end of the closed container of FIG.

FIG. 17 is a vertical sectional view showing Embodiment 10 of the present invention.

FIG. 18 is a vertical cross-sectional view of a conventional scroll compressor.

FIG. 19 is an enlarged view of the lower end portion of the closed container for explaining the centrifugal force distribution of the liquid in the oil tank during operation of the scroll compressor in FIG.

20 is an enlarged view of the lower end portion of the hermetically-sealed container for explaining the spiral flow of the liquid in the oil tank during operation of the scroll compressor in FIG.

21 is a diagram for explaining the centrifugal force of the lubricating oil or the mixed liquid, the position head of the lubricating oil or the mixed liquid, and the centrifugal force of the lubricating oil or the mixed liquid and the resultant force of the position head in the oil tank during the operation of the scroll compressor in FIG. .

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 closed container, 2 fixed scroll, 3 rocking scroll, 4 compression chamber, 5 oil tank, 6 bearing frame, 7 oil return hole, 8 electric motor, 9 shaft, 13 oil supply hole, 14 baffle plate, 15 oil pump, 21-23 Sliding part, 2
8 agitation suppression member, 30 oil passage, 31 small diameter member.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Tadashi Kimura 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Sanryo Electric Co., Ltd.

Claims (10)

[Claims] 1. A fixed scroll arranged on an upper side in a closed container, an orbiting scroll engaged with the fixed scroll to form a compression chamber, and a fixed scroll provided in the closed container to drive the orbiting scroll. An electric motor, and a shaft of the electric motor having an oil supply hole arranged so as to penetrate along the axis,
The oil tank provided on the lower side in the closed container, and the lubricating oil provided on the lower end of the shaft and arranged in the lubricating oil of the oil tank, through the oil supply hole, to the sliding portion related to the orbiting scroll. A scroll compressor having an oil pump for supplying the oil, and a stirring suppressing member formed in a cylindrical shape and provided in the lubricating oil to surround the oil pump. 2. A fixed scroll arranged on the upper side in the closed container, an orbiting scroll engaged with the fixed scroll to form a compression chamber, and a fixed scroll provided in the closed container to drive the orbiting scroll. An electric motor, and a shaft of the electric motor having an oil supply hole arranged so as to penetrate along the axis,
The oil tank provided on the lower side in the closed container, and the lubricating oil provided on the lower end of the shaft and arranged in the lubricating oil of the oil tank, through the oil supply hole, to the sliding portion related to the orbiting scroll. And an agitation suppressing member that is cylindrical and has a lower end fixed to the bottom surface of the closed container, an oil passage is provided near the lower end, is disposed in the lubricating oil, and surrounds the oil pump. Equipped scroll compressor. 3. A fixed scroll arranged on the upper side in the closed container, an orbiting scroll engaged with the fixed scroll to form a compression chamber, and a fixed scroll provided in the closed container to drive the orbiting scroll. An electric motor, and a shaft of the electric motor having an oil supply hole arranged so as to penetrate along the axis,
The oil tank provided on the lower side in the closed container, and the lubricating oil provided on the lower end of the shaft and arranged in the lubricating oil of the oil tank, through the oil supply hole, to the sliding portion related to the orbiting scroll. A scroll compressor provided with an oil pump for supplying the oil pump, and a stirring suppressing member which is formed in a conical cylinder shape similar to the conical shape of the outer surface of the oil pump and is provided in the lubricating oil and surrounds the oil pump. 4. A fixed scroll arranged on the upper side in the closed container, an orbiting scroll engaged with the fixed scroll to form a compression chamber, and a fixed scroll provided in the closed container to drive the orbiting scroll. An electric motor, and a shaft of the electric motor having an oil supply hole arranged so as to penetrate along the axis,
The oil tank provided on the lower side in the closed container, and the lubricating oil provided on the lower end of the shaft and arranged in the lubricating oil of the oil tank, through the oil supply hole, to the sliding portion related to the orbiting scroll. An oil pump for supplying the oil, a net formed in a bowl shape, the opening of the bowl is fixed to the bottom surface of the closed container, and the outer surface of the bottom of the bowl is arranged to face the lower surface of the oil pump. A scroll compressor provided with a stirring suppressing member provided inside. 5. A fixed scroll arranged on the upper side in the closed container, an orbiting scroll engaging with the fixed scroll to form a compression chamber, and a fixed scroll provided in the closed container to drive the orbiting scroll. An electric motor, and a shaft of the electric motor having an oil supply hole arranged so as to penetrate along the axis,
The oil tank provided on the lower side in the closed container, and the lubricating oil provided on the lower end of the shaft and arranged in the lubricating oil of the oil tank, through the oil supply hole, to the sliding portion related to the orbiting scroll. An oil pump for supplying the oil, a plate surface made of a plate arranged in a direction along the longitudinal direction of the shaft and provided across the inside of the oil tank, and a gap is formed in the oil pump to be opposed to each other. A scroll compressor provided with a stirring suppressing member provided inside. 6. A fixed scroll arranged on an upper side in the closed container, an orbiting scroll engaged with the fixed scroll to form a compression chamber, and a fixed scroll provided in the closed container to drive the orbiting scroll. An electric motor, and a shaft of the electric motor having an oil supply hole arranged so as to penetrate along the axis,
The oil tank provided on the lower side in the closed container, and the lubricating oil provided on the lower end of the shaft and arranged in the lubricating oil of the oil tank, through the oil supply hole, to the sliding portion related to the orbiting scroll. And an oil pump for supplying the oil tank and a baffle plate that covers the oil tank and has a peripheral edge portion mounted on the inner peripheral wall surface of the closed container, is provided in the lubricating oil, and is arranged to face the oil pump. A scroll compressor including a stirring suppressing member. 7. A fixed scroll arranged on the upper side in the closed container, an orbiting scroll engaged with the fixed scroll to form a compression chamber, and a fixed scroll provided in the closed container to drive the orbiting scroll. An electric motor, and a shaft of the electric motor having an oil supply hole arranged so as to penetrate along the axis,
The oil tank provided on the lower side in the closed container, and the lubricating oil provided on the lower end of the shaft and arranged in the lubricating oil of the oil tank, through the oil supply hole, to the sliding portion related to the orbiting scroll. Which is provided in the oil tank and has an upper end opening near the oil surface in the lubricating oil, descends along the inner wall of the closed container, and an opening at the lower end is the oil pump. Compressor provided with a stirring suppressing member arranged to face the lower surface of the scroll compressor. 8. A fixed scroll arranged on the upper side in the closed container, an orbiting scroll engaging with the fixed scroll to form a compression chamber, and a fixed scroll provided in the closed container to drive the orbiting scroll. An electric motor, and a shaft of the electric motor having an oil supply hole arranged so as to penetrate along the axis,
The oil tank provided on the lower side in the closed container, and the lubricating oil provided on the lower end of the shaft and arranged in the lubricating oil of the oil tank, through the oil supply hole, to the sliding portion related to the orbiting scroll. An oil pump that supplies the oil, and an upper end that is provided in the oil tank and that communicates with an oil return hole of a bearing frame whose upper end constitutes a sliding portion related to the orbiting scroll and that extends along the inner wall of the closed container. A scroll compressor that is equipped with an agitation suppressing member that descends and has an opening at the lower end facing the lower surface of the oil pump. 9. A fixed scroll disposed in an upper part of the closed container, an orbiting scroll engaged with the fixed scroll to form a compression chamber, and a fixed scroll provided in the closed container to drive the orbiting scroll. An electric motor, and a shaft of the electric motor having an oil supply hole arranged so as to penetrate along the axis,
The oil tank provided on the lower side in the closed container, and the lubricating oil provided on the lower end of the shaft and arranged in the lubricating oil of the oil tank, through the oil supply hole, to the sliding portion related to the orbiting scroll. And an agitation suppression member having a suction hole on the lower surface, which is formed integrally with the oil pump and has a small diameter portion formed below the large diameter portion of the oil pump. Compressor. 10. The scroll compressor according to claim 1, further comprising a small diameter member provided with a suction hole on a lower surface and projecting from a lower end of the oil pump.