WO2021176541A1

WO2021176541A1 - Scroll compressor and method for manufacturing scroll compressor

Info

Publication number: WO2021176541A1
Application number: PCT/JP2020/008805
Authority: WO
Inventors: 令三坂
Original assignee: 三菱電機株式会社
Priority date: 2020-03-03
Filing date: 2020-03-03
Publication date: 2021-09-10
Also published as: JPWO2021176541A1; JP7278473B2

Abstract

This scroll compressor is provided with: a compression mechanism provided with a fixed scroll and an oscillation scroll that performs oscillation motion with respect to the fixed scroll; an electric motor that drives the compression mechanism; and a frame having a thrust reception surface that slides on the oscillation scroll. The scroll compressor is further provided with a permanent magnet that is embedded in the oscillation scroll and an electromagnet coil that is embedded at a position facing the permanent magnet in the frame and generates a repulsive force with the permanent magnet. The electromagnet coil and the electric motor are connected in series to each other.

Description

Scroll compressor and manufacturing method of scroll compressor

The present disclosure relates to a scroll compressor having a swing scroll in which a magnet is embedded and a method for manufacturing the scroll compressor.

There are a fixed scroll compliant method, a swing scroll compliant method, and a tooth tip tip sealing method as methods for preventing leakage of the spiral tooth tip in the scroll compressor. In either method, the swing scroll is a necessary component due to the structure of the scroll compressor, and therefore a component that supports the swing scroll in the axial direction (hereinafter referred to as a frame) is also required.

The scroll compressor performs a compression operation in which low-pressure refrigerant is sucked in and high-pressure refrigerant is discharged, and among the gas loads generated by compressing the refrigerant, the axial load acts as a thrust load on the swing scroll. .. When the thrust load acts on the swing scroll, the swing scroll is pressed against the frame, and a sliding loss occurs when sliding with respect to the frame. This sliding loss is a factor of performance deterioration, and various mechanisms for generating a force in the direction of separating the swing scroll and the frame have been considered as a measure for improving the sliding loss. For example, Patent Document 1 describes a method in which permanent magnets are embedded in both the swing scroll and the frame, and a force in a direction that separates the swing scroll and the frame is generated by a repulsive force between the permanent magnets.

Japanese Unexamined Patent Publication No. 2000-130362

In the operation of the compressor, the thrust load also changes because the operating range changes from light load operation with a light load to heavy load operation with a heavy load according to the control request of the unit. In Patent Document 1, since a permanent magnet is used, the magnetic force is constant, and it is not possible to follow the thrust load that changes with the operation of the compressor. Therefore, the thrust load cannot be appropriately reduced in a wide operating range.

Specifically, when the strength of the magnetic force of the permanent magnet is adjusted according to the thrust load during heavy load operation, the separation force between the swing scroll and the frame becomes too strong during light load operation. On the contrary, when the magnetic force is adjusted according to the thrust load during the light load operation, the separating force between the swing scroll and the frame becomes insufficient during the heavy load operation.

The present disclosure has been made to solve the above-mentioned problems, and provides a scroll compressor and a method for manufacturing a scroll compressor capable of appropriately reducing the thrust load acting on the frame in a wide operating range. The purpose is to do.

The scroll compressor according to the present disclosure includes a fixed scroll and a compression mechanism having a swinging scroll that swings with respect to the fixed scroll, an electric motor that drives the compression mechanism, and a thrust receiving surface that slides with the swinging scroll. It is provided with a frame, a permanent magnet embedded in a swing scroll, and an electromagnet coil embedded in the frame at a position facing the permanent magnet and generating a repulsive force between the permanent magnet, and the electromagnet coil and the motor are connected in series. It is connected to.

The method for manufacturing a scroll compressor according to the present disclosure is the above-mentioned method for manufacturing a scroll compressor, which includes a step of manufacturing a swing scroll from a liquid material, and in the step of manufacturing a swing scroll, the material is used. A permanent magnet is embedded in a material when it is in a liquid state, and a structure in which the permanent magnet is embedded at the same time in the process of manufacturing a swing scroll is manufactured.

According to the present disclosure, since the electromagnet coil and the electric motor are connected in series, a current corresponding to the rotation speed of the electric motor flows through the electromagnet coil, and the repulsive force generated between the electromagnet coil and the permanent magnet is used as an operating load. It can be adjusted accordingly. Therefore, the thrust load acting on the thrust receiving surface can be appropriately reduced in a wide operating range.

It is a schematic vertical sectional view of the scroll compressor which concerns on Embodiment 1. FIG. It is a partially enlarged sectional view of the scroll compressor which concerns on Embodiment 1. FIG. FIG. 5 is a schematic view of a swing scroll of the scroll compressor according to the first embodiment as viewed from the frame side. FIG. 5 is a schematic view of a movable frame of the scroll compressor according to the first embodiment as viewed from the swing scroll side. It is an electric circuit diagram of the scroll compressor which concerns on Embodiment 1. FIG. It is a partially enlarged sectional view of the scroll compressor which concerns on Embodiment 2. FIG. FIG. 5 is a schematic view of a movable frame of the scroll compressor according to the second embodiment as viewed from the swing scroll side. It is an electric circuit diagram which shows the connection example of the electromagnet coil of the scroll compressor which concerns on Embodiment 2. FIG. It is an electric circuit diagram which shows the other connection example of the electromagnet coil of the scroll compressor which concerns on Embodiment 2. FIG. FIG. 5 is a schematic schematic view of a movable frame of the scroll compressor according to the third embodiment as viewed from the fixed scroll side. It is an electric circuit diagram which shows the connection example 1 of the electromagnet coil of the scroll compressor which concerns on Embodiment 3. FIG. It is an electric circuit diagram which shows the connection example 2 of the electromagnet coil of the scroll compressor which concerns on Embodiment 3. FIG. It is an electric circuit diagram which shows the connection example 3 of the electromagnet coil of the scroll compressor which concerns on Embodiment 3. FIG. FIG. 5 is a schematic view of a swing scroll of the scroll compressor according to the fourth embodiment as viewed from the frame side. It is explanatory drawing explaining the movement of the permanent magnet with the swinging motion of the rocking scroll of the scroll compressor which concerns on Embodiment 4. FIG.

Embodiment 1.
FIG. 1 is a schematic vertical sectional view of the scroll compressor according to the first embodiment. In FIG. 1 and the figures described below, those having the same reference numerals are the same or equivalent thereof, which are common to the entire text of the specification. Furthermore, the forms of the components appearing in the entire specification are merely examples and are not limited to these descriptions.

The scroll compressor 100 is a fluid machine that sucks in the refrigerant that circulates in the refrigeration cycle, compresses it, and discharges it in a high temperature and high pressure state. The scroll compressor 100 is one of the components of a refrigerating cycle device used in various industrial machines such as a refrigerator, a freezer, a vending machine, an air conditioner, a refrigerating device, or a hot water supply device.

As shown in FIG. 1, the scroll compressor 100 includes a compression mechanism 101 that compresses a refrigerant, an electric motor 7 that drives the compression mechanism 101 via a spindle 6, and a closed container 10 that houses the compression mechanism 101 and the electric motor 7. ,have. In the closed container 10, the compression mechanism 101 is arranged above, and the electric motor 7 is arranged below the compression mechanism 101.

An oil reservoir 11 for storing lubricating oil is formed at the bottom of the closed container 10. A suction pipe 9a for sucking the refrigerant gas and a discharge pipe 9b for discharging the refrigerant gas are connected to the closed container 10.

The compression mechanism 101 is fixed in the closed container 10, and includes a fixed scroll 1, a swinging scroll 2 that swings with respect to the fixed scroll 1, a movable frame 3, a fixed frame 4, and the like. .. The fixed scroll 1 has a fixed base plate portion 1a and fixed spiral teeth 1b which are spiral protrusions formed on one surface of the fixed base plate portion 1a. Further, the oscillating scroll 2 is formed on one surface of the oscillating base plate portion 2a and the oscillating base plate portion 2a, and is a oscillating spiral tooth which is a spiral protrusion having substantially the same shape as the fixed vortex tooth 1b. It has 2b and. The other surface of the rocking base plate portion 2a, that is, the surface opposite to the surface on which the swinging spiral tooth 2b is formed is a thrust surface 2e that supports the thrust load. The swing scroll 2 and the fixed scroll 1 are supported from below by a fixed frame 4 fixed to the closed container 10.

The thrust load generated in the swing scroll 2 during the operation of the compressor is supported by the fixed frame 4 via the thrust surface 2e. The portion of the movable frame 3 that slides on the thrust surface 2e of the swing scroll 2 is the thrust receiving surface 3a of the thrust bearing for improving the slidability. The thrust bearing is composed of, for example, a thrust plate.

The swinging scroll 2 and the fixed scroll 1 are mounted in the closed container 10 in a state where the swinging spiral tooth 2b and the fixed spiral tooth 1b are combined with each other. By combining the swinging spiral tooth 2b and the fixed spiral tooth 1b with each other, a plurality of compression chambers 14 for compressing the refrigerant are formed between the swinging spiral tooth 2b and the fixed spiral tooth 1b. The plurality of compression chambers 14 suck the refrigerant gas from the compression chamber suction space 14a existing on the outer periphery thereof into the outermost chamber 14b of the compression chamber, and apply the pressure of the refrigerant gas as it shifts to the central portion as the spindle 6 rotates. It is raised and discharged from the innermost chamber 14c of the compression chamber formed in the center to the upper space 10a of the closed container 10.

The fixed scroll 1 is fixed to the fixed frame 4 by bolts 16 and the like. A discharge port 15 for discharging the refrigerant gas compressed in the compression chamber 14 and having a high pressure is formed in the central portion of the fixed base plate portion 1a of the fixed scroll 1. The compressed and high-pressure refrigerant gas is discharged from the outermost chamber 14b of the compression chamber to the upper space 10a of the closed container 10 via the discharge port 15. The refrigerant gas discharged into the upper space 10a is discharged from the discharge pipe 9b to the outside of the closed container 10.

A hollow cylindrical boss portion 2c is formed at a substantially central portion of the surface of the swing scroll 2 opposite to the surface on which the swing spiral tooth 2b is formed. An eccentric shaft portion 6a, which will be described later, is inserted into the boss portion 2c.

The fixed frame 4 has an upper fitting cylindrical surface 4a on the compression mechanism 101 side of the inner peripheral surface of the fixed frame 4, and a lower fitting cylindrical surface 4b on the motor 7 side. The upper fitting cylindrical surface 4a is engaged with the upper fitting cylindrical surface 3d formed on the outer peripheral surface of the movable frame 3. Further, the lower fitting cylindrical surface 4b is engaged with the lower fitting cylindrical surface 3e formed on the outer peripheral surface of the movable frame 3. The space inside the movable frame 3, that is, the space on the outer peripheral side of the thrust receiving surface 3a, that is, the space on the outer peripheral side of the swing base plate portion 2a of the swing scroll 2, is a compressor having an intake gas atmosphere (suction pressure). It communicates with the suction space 12.

An old dam ring 5 is arranged between the fixed scroll 1 and the movable frame 3. The oldham ring 5 has a pair of oldam fixing claws 5a, a pair of oldam swinging claws 5b, and an oldam annular portion 5c provided with a pair of oldam fixing claws 5a and a pair of oldam swinging claws 5b. The Oldham fixed claw 5a and the Oldam swinging claw 5b are formed with a phase difference of 90 degrees.

The pair of oldham fixing claws 5a are reciprocally and slidably engaged with the pair of oldam guide grooves 1c formed substantially in a straight line with the fixed base plate portion 1a of the fixed scroll 1. Further, the pair of Oldham swing claws 5b are reciprocally and slidably engaged with the pair of Oldham guide grooves 2f formed in a substantially straight line on the outer peripheral portion of the swing base plate portion 2a of the swing scroll 2. .. On the radial outer side of the thrust receiving surface 3a of the movable frame 3, a surface 3b on which the oldam annular portion 5c of the oldam ring 5 slides back and forth is formed. Since the rotation of the swing scroll 2 is blocked by the old dam ring 5, the swing scroll 2 to which the rotational force of the electric motor 7 is transmitted revolves with respect to the fixed scroll 1 without rotating.

The motor 7 has a rotor 7a and a stator 7b arranged on the outer peripheral side of the rotor 7a. The stator 7b is shrink-fitted and fixed to the inner circumference of the closed container 10. Electric power is supplied to the stator 7b via the power supply terminal 10b provided in the closed container 10. The rotor 7a rotates when the stator 7b is energized, and drives the spindle 6 to rotate.

The spindle 6 rotates with the rotation of the rotor 7a, and transmits the rotational driving force of the motor 7 to the compression mechanism 101. The upper part of the spindle 6 is rotatably supported by the spindle bearing 3c provided on the fixed frame 4. An eccentric shaft portion 6a eccentric with respect to the central shaft of the main shaft 6 is provided at the upper end of the main shaft 6. The eccentric shaft portion 6a is inserted into the boss portion 2c of the swing scroll 2. A swing bearing 2d is formed on the inner surface of the boss portion 2c, and the eccentric shaft portion 6a is rotationally supported by the swing bearing 2d. The lower part of the spindle 6 is rotatably supported by an auxiliary bearing (not shown). The sub-bearing is press-fitted and fixed to the bearing accommodating portion formed in the central portion of the sub-frame 8 provided in the lower part of the closed container 10.

FIG. 2 is a partially enlarged cross-sectional view of the scroll compressor according to the first embodiment. FIG. 3 is a schematic view of the swing scroll of the scroll compressor according to the first embodiment as viewed from the frame side. In FIG. 3, the portion where the permanent magnet is embedded is indicated by a dot. FIG. 4 is a schematic view of the movable frame of the scroll compressor according to the first embodiment as viewed from the swing scroll side.

As shown in FIG. 2, a permanent magnet 50 is embedded in the swing base plate portion 2a of the swing scroll 2 so as to be closer to the thrust surface 2e side. As shown in FIG. 3, the permanent magnet 50 is formed in a ring shape coaxial with the central axis O of the swing scroll 2. The method of embedding the permanent magnet 50 in the rocking base plate portion 2a of the swing scroll 2 is, for example, to provide a ring-shaped groove in the rocking base plate portion 2a, embed the permanent magnet 50 in the groove, and then the remaining in the groove. The space portion may be covered with a ring-shaped member made of the same material as the rocking base plate portion 2a. Note that this method is an example and is not limited to this method.

An electromagnet coil 51 is embedded in the movable frame 3 at a position facing the permanent magnet 50 so as to be closer to the thrust receiving surface 3a. The electromagnet coil 51 is for generating a repulsive force with the permanent magnet 50.

The

electromagnet coil conductors

51a and 51b at both ends of the electromagnet coil 51 are drawn out of the fixed frame 4 through the conductor passage 4c. Both ends of the conducting wire connecting passage 4c are closed by the connecting passage closing component 4d while passing through the electromagnet

coil conducting wires

51a and 51b. Since the space inside the fixed frame 4 is the suction pressure and the space outside is the discharge pressure, when the conductor passage 4c is open, the pressure in the space inside the fixed frame 4 side rises and the movable frame 3 is pushed up and pushed toward the swing scroll 2 side. Therefore, the conductor connecting passage 4c is provided with the connecting passage closing component 4d to block the inside and the outside of the fixed frame 4 side. Although two passage obstruction parts 4d are shown in FIG. 2, one may be used as long as the inner space and the outer space on the fixed frame 4 side can be blocked.

Further, FIG. 2 shows an example in which the electromagnet coil 51 is provided on the movable frame 3, but the present invention is not limited to this depending on the structure of the scroll compressor 100. For example, if the movable frame 3 is not provided and the fixed frame 4 supports the swing scroll 2, the electromagnet coil 51 is provided in the fixed frame 4. In short, the electromagnet coil 51 may be provided on the frame that supports the swing scroll 2.

As shown in FIG. 4, the electromagnet coil 51 has an arc shape when viewed in a plane, and both ends 51c of the arc shape face each other with a minute distance. Although both ends of the electromagnet coil 51 are separated from each other in FIG. 4, they may be extended in the circumferential direction so that both ends overlap each other. At this time, if both ends of the electromagnet coil 51 are extended in the circumferential direction at the same height position, they interfere with each other. Therefore, the positions in the vertical direction may be shifted and the electromagnet coils 51 may be extended in the circumferential direction.

FIG. 5 is an electric circuit diagram of the scroll compressor according to the first embodiment. As shown in FIG. 5, the electromagnet coil 51 is connected in series with the motor 7. Specifically, the electromagnet coil lead wire 51a of the motor 7 is connected to the power supply terminal 10b, and the electromagnet coil lead wire 51b is connected to the motor lead wire 7d. The motor conductor 7c is connected to the power supply terminal 10b. The power supply terminal 10b is connected to the power supply 20. As a result, the electric power input to the scroll compressor 100 generates a magnetic force in the electromagnet coil 51, and then drives the electric motor 7. Alternatively, the order may be reversed, and after driving the motor 7, a magnetic force may be generated in the electromagnet coil 51. When electric power is input to the electromagnet coil 51, a repulsive force is generated between the electromagnet coil 51 and the permanent magnet 50.

Next, the operation of the scroll compressor 100 will be described.
When the power supply terminal 10b is energized, the motor 7 rotates and the spindle 6 is rotationally driven. When the main shaft 6 is rotationally driven, the swing scroll 2 is restricted from rotating by the old dam ring 5 and makes an eccentric turning motion. The refrigerant sucked into the closed container 10 through the suction pipe 9a is taken into the compression chamber 14 via the compression chamber suction space 14a. The compression chamber 14 that has taken in the gas reduces the volume while moving from the outer peripheral portion toward the center along with the eccentric turning motion of the rocking scroll 2, and compresses the refrigerant. The gas refrigerant compressed in the compression chamber 14 is discharged from the discharge port 15 provided in the fixed scroll 1 to the upper space 10a, and is discharged from the discharge pipe 9b to the outside of the closed container 10.

During the operation of the compressor, the thrust receiving surface 3a of the fixed frame 4 receives the thrust load generated by the pressure of the refrigerant gas in the compression chamber 14. During heavy load operation with a heavy load, the rotation speed of the motor 7 is increased, so that the thrust load received by the thrust receiving surface 3a becomes large. During heavy load operation, the current flowing into the motor 7 increases in order to increase the rotation speed of the motor 7, so that the current flowing into the electromagnet coil 51 connected in series with the motor 7 also inevitably increases. As the current flowing into the electromagnet coil 51 increases, the magnetic force generated from the electromagnet coil 51 increases, and the repulsive force acting between the electromagnet coil 51 and the permanent magnet 50 is commensurate with the increase in the number of rotations of the motor 7. growing. That is, the repulsive force acting between the electromagnet coil 51 and the permanent magnet 50 is adjusted to a repulsive force according to the current operating load. Therefore, the thrust load acting on the thrust receiving surface 3a of the fixed frame 4 is appropriately reduced, the sliding loss between the swing scroll 2 and the fixed frame 4 can be reduced, and the performance can be improved. At the same time, it is possible to prevent seizure between the swing scroll 2 and the fixed frame 4.

On the other hand, during light load operation, the rotation speed of the motor 7 is reduced, so that the thrust load received by the thrust receiving surface 3a becomes small. During light load operation, the current flowing into the motor 7 is reduced in order to reduce the rotation speed of the motor 7, so that the current flowing into the electromagnet coil 51 connected in series with the motor 7 is inevitably reduced. Since the magnetic force generated from the electromagnet coil 51 is reduced by reducing the current flowing into the electromagnet coil 51, the repulsive force acting between the electromagnet coil 51 and the permanent magnet 50 is commensurate with the decrease in the number of rotations of the motor 7. Just get smaller. That is, the repulsive force acting between the electromagnet coil 51 and the permanent magnet 50 is adjusted to a repulsive force according to the current operating load. Therefore, the thrust load acting on the thrust receiving surface 3a of the fixed frame 4 is appropriately reduced, and the sliding loss can be reduced while preventing the swing scroll 2 and the fixed frame 4 from being completely separated from each other. Performance can be improved.

As described above, the scroll compressor 100 of the first embodiment drives a compression mechanism 101 having a fixed scroll 1 and a swing scroll 2 that swings with respect to the fixed scroll 1, and a compression mechanism 101. It includes an electric motor 7 and a frame having a thrust receiving surface 3a that slides on the swing scroll 2. The scroll compressor 100 further includes a permanent magnet 50 embedded in the swing scroll 2 and an electromagnet coil 51 embedded in the frame at a position facing the permanent magnet 50 to generate a repulsive force between the permanent magnet 50 and the permanent magnet 50. .. The electromagnet coil 51 and the motor 7 are connected in series.

Since the electromagnet coil 51 and the electric motor 7 are connected in series in this way, a current corresponding to the rotation speed of the electric motor 7 flows through the electromagnet coil 51, and a repulsive force generated between the electromagnet coil 51 and the permanent magnet 50 is generated. Can be adjusted according to the operating load. Therefore, the thrust load acting on the thrust receiving surface 3a can be appropriately reduced in a wide operating range. Therefore, even when an excessive thrust load is generated due to the pressure of the refrigerant gas in the compression chamber 14, a highly reliable compressor capable of preventing problems such as seizure between the swing scroll 2 and the frame can be obtained. Can be done. Then, since the thrust load acting on the frame can be appropriately reduced, it is possible to obtain a high-performance compressor in which the sliding loss generated between the swing scroll 2 and the frame is reduced.

Further, when the motor 7 is operated in reverse phase due to a wiring error during the installation work of the unit, the electromagnet coil 51 and the permanent magnet 50 are attracted to each other, and an excessive thrust force is generated. In this case, an overcurrent is generated immediately after the reverse phase operation, and the safety device of the refrigeration cycle device interrupts the electric circuit of the motor 7 to stop the compressor. Therefore, before the compressor is fatally damaged. It is possible to obtain a highly reliable compressor that can be stopped.

Embodiment 2.
In the second embodiment, the number of electromagnet coils is a plurality. Hereinafter, the differences between the second embodiment and the first embodiment will be mainly described, and the configurations not described in the second embodiment are the same as those in the first embodiment.

FIG. 6 is a partially enlarged cross-sectional view of the scroll compressor according to the second embodiment. FIG. 7 is a schematic view of the movable frame of the scroll compressor according to the second embodiment as viewed from the swing scroll side. In FIG. 7, the electromagnet coils 51 are formed in a circular shape when viewed in a plane, and a plurality of electromagnet coils 51 are embedded in the movable frame 3. Specifically, the electromagnet coils 51 are arranged at intervals on concentric circles centered on the central axis of the movable frame 3, and are embedded in the movable frame 3 closer to the thrust receiving surface 3a side. In FIG. 7, eight electromagnet coils 51 are shown, but any number of two or more may be used.

When the number of the electromagnet coils 51 is two, the electromagnet coils 51 are formed into an arc shape, specifically, a semicircular shape as in the first embodiment so that the electromagnetic force is uniformly generated on the thrust receiving surface 3a. do. When three or more electromagnet coils 51 are installed, the electromagnet coils 51 may have a circular shape or an arc shape as shown in FIGS. 6 and 7. In short, the number and shape of the electromagnet coils 51 that can uniformly generate electromagnetic force on the thrust receiving surface 3a by the plurality of electromagnet coils 51 may be set.

FIG. 8 is an electric circuit diagram showing a connection example of the electromagnet coil of the scroll compressor according to the second embodiment. FIG. 9 is an electric circuit diagram showing another connection example of the electromagnet coil of the scroll compressor according to the second embodiment. The plurality of electromagnet coils 51 are all connected in series as shown in FIG. 8 or in parallel as shown in FIG. However, the entire electromagnet coil 51 and the motor 7 are connected in series.

According to the second embodiment, the same effect as that of the first embodiment can be obtained.

Embodiment 3.
In the third embodiment, the connection circuits of the plurality of electromagnet coils 51 are different from those in the second embodiment. Hereinafter, the differences between the third embodiment and the second embodiment will be mainly described, and the configurations not described in the third embodiment are the same as those in the second embodiment.

FIG. 10 is a schematic schematic view of the movable frame of the scroll compressor according to the third embodiment as viewed from the fixed scroll side. FIG. 11 is an electric circuit diagram showing a connection example 1 of an electromagnet coil of the scroll compressor according to the third embodiment. FIG. 12 is an electric circuit diagram showing a connection example 2 of an electromagnet coil of the scroll compressor according to the third embodiment. FIG. 13 is an electric circuit diagram showing a connection example 3 of the electromagnet coil of the scroll compressor according to the third embodiment. A to H of FIGS. 10 to 13 show the electromagnet coil 51. Although FIG. 10 shows an example in which the electromagnet coil has the circular shape of the second embodiment shown in FIG. 7, the arc shape of the first embodiment shown in FIG. 4 may be used.

The third embodiment has an electric circuit in which a part of a plurality of electromagnet coils 51 is connected in series and the rest are connected in parallel. The entire electromagnet coil 51 and the motor 7 are connected in series. Specific connection examples are shown in FIGS. 11 to 13. In FIG. 11, a series circuit in which the electromagnet coils 51 of A, B, C, and D are connected in series and a series circuit in which the electromagnet coils 51 of E, F, G, and H are connected in series are arranged in parallel. It is connected to the. In FIG. 12, a series circuit in which the electromagnet coils 51 of A and B are connected in series, a series circuit in which the electromagnet coils 51 of C and D are connected in series, and the electromagnet coils 51 of E and F are connected in series. A series circuit connected to the above and a series circuit in which the G and H electromagnet coils 51 are connected in series are connected in parallel. In FIG. 13, a series circuit in which the electromagnet coils 51 of A, C, E, and G are connected in series and a series circuit in which the electromagnet coils 51 of B, D, F, and H are connected in series are arranged in parallel. It is connected to the.

The combination of the electromagnet coils 51 connected in series is not limited to the combinations shown in FIGS. 11 to 13, and is free. In any combination, the entire electromagnet coil 51 is connected in series with the motor 7.

According to the third embodiment, the same effect as that of the first embodiment can be obtained.

Embodiment 4.
In the fourth embodiment, the number of permanent magnets 50 is a plurality. Hereinafter, the differences between the fourth embodiment and the first embodiment will be mainly described, and the configurations not described in the fourth embodiment are the same as those in the first embodiment.

FIG. 14 is a schematic view of the swing scroll of the scroll compressor according to the fourth embodiment as viewed from the frame side. In FIG. 14, the portion where the permanent magnet 50 is embedded is indicated by dots. FIG. 15 is an explanatory diagram illustrating the movement of the permanent magnets accompanying the swinging motion of the swinging scroll of the scroll compressor according to the fourth embodiment.

In FIG. 14, the permanent magnets 50 are formed in a cylindrical shape, and a plurality of permanent magnets 50 are embedded in the swing base plate portion 2a of the swing scroll 2. FIG. 14 shows an example in which 12 permanent magnets 50 are used, but the number is arbitrary. The number of the electromagnet coils 51 may be one as shown in FIG. 4, or may be a plurality as shown in FIG. 7. When a plurality of electromagnet coils 51 are used, the number of permanent magnets 50 and the number of electromagnets may be the same or different. When the number of permanent magnets 50 and the number of electromagnets are different, either of them may be large.

Here, when the permanent magnet 50 and the electromagnet coil 51 are both a plurality, the optimization of the shape, the number, and the position of the permanent magnet 50 and the electromagnet coil 51 will be examined. The permanent magnet 50 moves with the swinging motion of the swinging scroll 2 as shown by the arrow 50a in FIG. Therefore, the shapes, numbers, and positions of the permanent magnet 50 and the electromagnet coil 51 are optimized based on the movement locus of the permanent magnet 50 accompanying the swinging motion of the swinging scroll 2. Specifically, it is optimized so that the permanent magnet 50 and the electromagnet coil 51 maintain their positions facing each other during the swinging motion of the swinging scroll 2.

It should be noted that all of the permanent magnet 50 and the electromagnet coil 51 do not have to always maintain the positions facing the electromagnet coil 51 during the swing operation, and at least a part of them may be maintained. In short, some or all of the shapes, numbers and positions of the permanent magnets 50 and the electromagnet coils 51 have been determined so that a necessary, sufficient and uniform repulsive force acts between the swing scroll 2 and the movable frame 3. Just do it. The point that the shapes, numbers, and positions of the permanent magnet 50 and the electromagnet coil 51 are optimized based on the movement locus of the permanent magnet 50 accompanying the swinging motion of the swinging scroll 2 is the present embodiment. The present invention is not limited to 4, and the same applies to the above-described first to third embodiments.

According to the fourth embodiment, the same effect as that of the first embodiment can be obtained.

Embodiment 5.
The fifth embodiment relates to the materials of the swing scroll 2 and the movable frame 3. The swing scroll 2 and the movable frame 3 may be made of a magnetic material or may be made of a non-magnetic material. When the swing scroll 2 and the movable frame 3 are made of a non-magnetic material, they may be made of a non-magnetic metal or a non-metal.

When the swing scroll 2 and the movable frame 3 are made of a magnetic material, the permanent magnet 50 embedded in the swing scroll 2 and the movable frame 3 are attracted to each other by magnetic force. Further, the electromagnet coil 51 and the swing scroll 2 embedded in the movable frame 3 are also attracted to each other by magnetic force. Therefore, when the swing scroll 2 and the movable frame 3 are made of a magnetic material, the effect of reducing the thrust load due to the repulsive force acting between the permanent magnet 50 and the electromagnet coil 51 is weakened. Therefore, when the swing scroll 2 and the movable frame 3 are made of a non-magnetic material, the effect of reducing the thrust load can be enhanced.

It should be noted that both the swing scroll 2 and the movable frame 3 may be formed of the non-magnetic material, or either one of them may be formed. Even if either one is used, the effect of reducing the thrust load can be enhanced as compared with the case where both are made of a magnetic material. Further, when both or one of the swing scroll 2 and the movable frame 3 is made of a non-magnetic material, the degree of freedom of optimization can be increased. In optimizing the shapes, numbers, and positions of the permanent magnet 50 and the electromagnet coil 51, the force attracting the permanent magnet 50 and the movable frame 3 and the electromagnet coil 51 and the swing scroll 2 attract each other. This is because there is no need to consider force.

According to the fifth embodiment, the same effect as that of the first embodiment can be obtained, and the following effects can be obtained by forming both or one of the swing scroll 2 and the movable frame 3 with a non-magnetic material. Be done. That is, the effect of reducing the thrust load can be improved, and the degree of freedom in optimizing the shape, number, and position of the permanent magnet 50 and the electromagnet coil 51 can be increased.

Embodiment 6.
The sixth embodiment relates to a method for manufacturing a scroll compressor. The method for manufacturing a scroll compressor includes a step of manufacturing the swing scroll 2 from a liquid material. In the sixth embodiment, in the step of manufacturing the swing scroll 2, the permanent magnet 50 is embedded in the material when the material is in a liquid state, and in the step of manufacturing the swing scroll 2, the permanent magnet 50 is embedded at the same time. Manufacture the structure. Hereinafter, a more specific description will be given.

First, the permanent magnet 50 is placed in the molding mold of the swing scroll 2. As the permanent magnet 50, a magnet made of a material having a melting point higher than the melting point of the material constituting the swing scroll 2 is used. Then, the liquid material of the swing scroll 2 is poured into the molding die and hardened. Thereby, at the same time as manufacturing the swing scroll 2, it is possible to manufacture a structure in which the permanent magnet 50 is embedded in the swing scroll 2. The permanent magnet 50 may be arranged in the molding die in advance, or the permanent magnet 50 may be inserted after the liquid material of the rocking scroll 2 is poured into the molding die and before the liquid material of the rocking scroll 2 is solidified. May be placed.

Alternatively, as another method, the liquid casting material of the swing scroll 2 may be cast into the mold of the swing scroll 2, and the casting magnet to be the permanent magnet 50 may be cast at the same time before the casting material is solidified. In this case, the permanent magnet 50 uses a material having a melting point lower than the melting point of the material of the rocking scroll 2.

In this way, it is possible to manufacture a structure in which the permanent magnet 50 is embedded at the same time in the process of manufacturing the swing scroll 2, and it is possible to prevent the post-process from becoming complicated and shorten the time.

Also, the electromagnet coil 51 is embedded at the same time in the process of manufacturing the movable frame 3. For example, a 3D printer or the like is used to embed the electromagnet coil 51 in the process of manufacturing the movable frame base material, or the electromagnet coil 51 itself is simultaneously manufactured by the 3D printer. Specifically, the periphery of the electromagnet coil 51 or the entire movable frame base material is molded with an insulator. The electromagnet coil 51 is arranged in the middle of molding the vicinity of the thrust receiving surface 3a of the movable frame base material, and then the molding of the entire movable frame base material is completed. Further, by molding both the insulator and the conductor at the same time, the entire electromagnet coil may be molded by the conductor. As a result, it is possible to prevent the post-process from becoming complicated and shorten the time.

1 Fixed scroll, 1a Fixed base plate part, 1b Fixed spiral tooth, 1c Oldham guide groove, 2 Swing scroll, 2a Swing base plate part, 2b Swing swirl tooth, 2c Boss part, 2d Swing bearing, 2e Thrust surface , 2f Oldham guide groove, 3 Movable frame, 3a Thrust receiving surface, 3b surface, 3c Main bearing, 3d Upper fitting cylindrical surface, 3e Lower fitting cylindrical surface, 4 Fixed frame, 4a Upper fitting cylindrical surface, 4b Lower fitting Combined cylindrical surface, 4c lead wire continuous passage, 4d continuous passage blocking part, 5 oldam ring, 5a oldam fixing claw, 5b oldam swing claw, 5c oldam annular part, 6 spindle, 6a eccentric shaft part, 7 electric motor, 7a rotor, 7b stator, 7c electromagnet lead wire, 7d electromagnet lead wire, 8 subframe, 9a suction pipe, 9b discharge pipe, 10 closed container, 10a upper space, 10b power supply terminal, 11 oil reservoir, 12 compressor suction space, 14 compression chamber , 14a compression chamber suction space, 14b compression chamber outermost chamber, 14c compression chamber innermost chamber, 15 discharge port, 16 volts, 20 power supply, 30b lower fitting cylindrical surface, 50 permanent magnet, 50a arrow, 51 electromagnet coil, 51a Electromagnet coil lead wire, 51b Electromagnet coil lead wire, 51c both ends, 100 scroll compressor, 101 compression mechanism.

Claims

A compression mechanism equipped with a fixed scroll and a swinging scroll that swings with respect to the fixed scroll,
The motor that drives the compression mechanism and
A frame having a thrust receiving surface that slides with the swing scroll, and
The permanent magnet embedded in the swing scroll and
It is provided with an electromagnet coil embedded in the frame at a position facing the permanent magnet and generating a repulsive force between the frame and the permanent magnet.
A scroll compressor in which the electromagnet coil and the electric motor are connected in series.
The scroll compressor according to claim 1, wherein a plurality of the electromagnet coils are embedded in the frame.
The scroll compressor according to claim 2, wherein a plurality of the electromagnet coils are all connected in series or in parallel, and the entire electromagnet coil and the motor are connected in series.
The scroll compressor according to claim 2, wherein the plurality of the electromagnet coils are connected to each other by a circuit in which a plurality of series circuits are connected in parallel, and the entire electromagnet coil and the motor are connected in series.
The scroll compressor according to any one of claims 1 to 4, wherein the number of the electromagnet coils and the number of the permanent magnets are the same or different.
The scroll compressor according to any one of claims 1 to 5, wherein the electromagnet coil has an arc shape centered on the central axis of the frame.
The scroll compressor according to any one of claims 1 to 5, wherein a plurality of the electromagnet coils are arranged on concentric circles centered on the central axis of the frame.
A part or all of the shapes, numbers, and positions of the electromagnet coil and the permanent magnets are optimized based on the movement locus of the permanent magnets accompanying the swinging motion of the swinging scroll. The scroll compressor according to any one of claims 7.
The scroll compressor according to claim 8, wherein the optimization is performed so as to maintain a position where the permanent magnet and the electromagnet coil face each other during the swinging motion of the swinging scroll.
The scroll compressor according to any one of claims 1 to 9, wherein both or one of the swing scroll and the frame is made of a non-magnetic material.
The method for manufacturing a scroll compressor according to any one of claims 1 to 10.
It has a process of manufacturing the swing scroll from a liquid material, and has a process of manufacturing the swing scroll.
In the step of manufacturing the rocking scroll, the permanent magnet is embedded in the material when the material is in a liquid state, and a structure in which the permanent magnet is embedded at the same time in the step of manufacturing the rocking scroll is manufactured. Manufacturing method of scroll compressor.
The method for manufacturing a scroll compressor according to any one of claims 1 to 10.
A method for manufacturing a scroll compressor in which the electromagnet coil is embedded at the same time in the process of manufacturing the frame.