JP2003314456A - Compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve separating and disassembling properties while preventing lowering of performance, generation of noise, and the like to be caused by the distortion and inclination of a closed container and a compression element of a compressor. <P>SOLUTION: The rotary compressor is provided with a motor element 14 and the rotary compression element 32 driven by the motor element 14, inside the closed container 12. The rotary compression element 32 is provided with a cylinder 40 fixed to the closed container 12, and a roller 48 fitted to an eccentric part 44 formed at a rotating shaft 16 of the motor element 14, and eccentrically rotated inside the cylinder 40. The closed container 12 and the cylinder 40 are respectively provided with thread grooves, and the thread grooves of a container body 12A and a bottom part 12C of the closed container 12, and the thread groove of the cylinder 40 are screwed with each other to fix the cylinder 40 to the closed container 12. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor, for example, a rotary compressor in which a hermetic container is provided with a rotary compression element and an electric element for driving the rotary compression element.

[0002]

2. Description of the Related Art Conventionally, a compressor of this type, particularly a rotary compressor, is driven by an electric element provided in a closed container and the electric element, as disclosed in Japanese Utility Model Laid-Open No. 64-4893. And a compression element (rotary compression element). The electric element is composed of an annular stator mounted along the inner peripheral surface of the upper space of the closed container, and a rotor inserted inside the stator with a slight gap between the rotor and the rotor. The child is shrink-fitted and fixed to a rotary shaft that extends vertically through the center. The rotary compression element includes a cylinder fixed to the inner surface of the closed container by welding, a support member that closes the opening surface of the cylinder, and a roller that is eccentrically rotated in the cylinder by being fitted to an eccentric portion formed on the rotary shaft. It has and.

The refrigerant gas is sucked into the low pressure chamber side of the cylinder from the suction port of the rotary compression element, is compressed by the operation of the roller and the vane, and is discharged from the high pressure chamber side of the cylinder through the discharge port and the discharge muffling chamber into the closed container. Is discharged. After that, the refrigerant gas is discharged to the outside from a refrigerant discharge pipe provided in the upper part of the hermetic container through a gap or the like formed between the rotor and the stator.

Here, when the rotary compression element is mounted in the closed container, the hole for inserting the refrigerant introduction pipe previously formed in the closed container and the suction passage formed in the cylinder are aligned with each other. After positioning, the outer diameter portion of the cylinder is brought into contact with the inner surface of the closed container, and in that state, the outer diameter portion is shrink-fitted to the inner surface of the closed container, and then tack welding is performed.

[0005]

As described above, in the conventional rotary compressor, since the cylinder is welded and fixed to the inner surface of the hermetically sealed container, heat is applied to the hermetically sealed container and the outer diameter portion of the cylinder that abuts the inner surface of the hermetically sealed container during assembly. In some cases, the heat may distort the closed container and the cylinder or cause the closed container and the cylinder to tilt with respect to the axis of the closed container.

When such a distortion of the cylinder occurs, the sealing property between the cylinder and the roller rotating in the cylinder is deteriorated and the refrigerant gas in the cylinder leaks, or the cylinder is eccentric. There is a disadvantage that the rotating roller causes noise due to the rotation.

When the closed container is distorted, the cylinder attached to the closed container tilts. If the cylinder is mounted so as to be tilted in this manner, the rotary shaft mounted inside the cylinder also tilts, and similarly the rotor mounted above the rotary shaft also tilts. As a result, there is a problem that the gap formed between the rotor and the stator becomes non-uniform, the magnetic attraction force becomes poor, and the performance is deteriorated.

Therefore, conventionally, a clearance is provided in advance at a location where distortion occurs due to heat during welding of a cylinder and a roller or the like in consideration of the distortion. That is, normally, when processing a part, two limit values, large and small, are set as the allowable amount of error, and the actually measured dimensions are set within this range (dimensional tolerance). In addition to this dimensional tolerance, a clearance (gap) is set in consideration of distortion in a portion affected by heat during welding. For example, between the inner surface of the cylinder and the outer surface of the roller, in addition to the clearance due to dimensional tolerance, a clearance considering the distortion due to heat during welding is provided to minimize the inconvenience due to the distortion of the cylinder due to heat during welding. I was avoiding it.

However, when the clearance is provided in consideration of the distortion due to heat during welding, if the clearance is too wide, the refrigerant gas leaks remarkably and the performance is deteriorated. On the other hand, if the clearance is too narrow, for example, if the clearance between the cylinder and the roller is too narrow, the roller may be locked, so the cylinder and the roller take into consideration distortion due to heat during welding during production. I had to secure enough clearance above. For this reason, it is necessary to strictly control the dimensions of parts such as cylinders and rollers.

On the other hand, in the conventional hermetic compressor, the rotary compression element is fixed by welding in a hermetic container, so that separation / disposal at the time of maintenance or disposal is required.
The degradability was very poor, and even when it was recycled after disposal, there was almost no use except for crushing and separating into raw materials. For this reason, there has been a strong demand for improvement in separation and disassembly of the compressor.

The present invention has been made in order to solve the above-mentioned conventional technical problems, and the deterioration of performance and the generation of noise caused by the distortion and inclination of the hermetically sealed container and the compression element of the compressor are obviated. The purpose is to prevent and to improve the separation and decomposability.

[0012]

That is, the rotary compression element of the present invention comprises a cylinder fixed to a closed container, a support member for closing the opening surface of the cylinder, and an eccentricity formed on the rotary shaft of the electric element. And a roller that is eccentrically rotated in the cylinder, and the hermetically sealed container and the rotary compression element each have a thread groove. By screwing the thread grooves into each other, the rotary compression element becomes a closed container. It is designed to be fixed.

In addition to the above, in the invention of claim 2, the hermetic container is separated into a portion located on the electric element side of the rotary compression element and a portion located on the opposite side, and the thread groove is formed on the outer surface of each portion. At the same time, the thread groove of the rotary compression element is formed on the inner side of the outer peripheral portion of the rotary compression element on the side of the electric element and on the opposite side thereof. The grooves are screwed together, and the outer peripheral surface of the rotary compression element is exposed outside the closed container.

According to the third aspect of the invention, in addition to the above, the electric element is composed of a stator attached to the inner peripheral surface of the hermetically sealed container and a rotor installed inside the stator and rotating in the stator. At the same time, each thread groove is a groove that is tightened in the direction opposite to the rotation direction of the rotor.

According to a fourth aspect of the present invention, a rotary compression element is fitted into a cylinder fixed to a closed container, a support member closing an opening surface of the cylinder, and an eccentric portion formed on a rotary shaft of the electric element. And a roller that is eccentrically rotated in the cylinder, and a refrigerant pipe for leading and discharging the refrigerant into and from the cylinder of the rotary compression element is connected to the rotary compression element and / or the hermetic container, and a refrigerant pipe fixed to these. Is provided with screw groove portions, and the screw groove portions are screwed together.

According to a fifth aspect of the present invention, in addition to the fourth aspect, the rotary compression element and the hermetically sealed container are provided with thread grooves, respectively, and the threaded grooves are screwed into each other so that the rotary compression element becomes a hermetically sealed container. It is fixed.

According to a sixth aspect of the compressor of the present invention, the hermetic container and the compression element each have a thread groove, and the thread elements are screwed into each other to fix the compression element to the hermetic container.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a vertical sectional view of a rotary compressor to which the present invention is applied. In FIG. 1, a rotary compressor 10 of the embodiment is a vertical cylindrical hermetic container 12 made of a steel plate, and a drive element arranged and housed above the inner space of the hermetic container 12 (in this embodiment, an electric element 14 is used). And a compression element that is disposed below the electric element 14 and is driven by the rotary shaft 16 of the electric element 14 (the rotary compression element 32 being a rotary compressor in this embodiment).
(Referred to as)).

The closed container 12 has a container body 12A which is opened vertically and accommodates the electric element 14, and a substantially bowl-shaped end cap (lid) 1 which closes the upper end opening of the container body 12A.
2B and a bottom portion 12C which is open at the top surface and is located at the bottom portion and the inside of which serves as an oil reservoir. A circular mounting hole 12D is formed on the upper surface of the end cap 12B, and a terminal (wiring is omitted) 20 for supplying electric power to the electric element 14 is mounted in the mounting hole 12D.

Further, as shown in FIG. 2, screw grooves 13A and 13C are formed on the outer peripheral surface of the lower end opening of the container body 12A and the outer peripheral surface of the upper end opening of the bottom portion 12C, respectively. These screw grooves 13A and 13C are for the cylinder 4 described later.
The screw groove 41 of 0 is mutually screwed.

The electric element 14 is an annular stator 2 welded and fixed along the inner peripheral surface of the container body 12A of the closed container 12.
2 and a rotor 24 that is inserted and installed inside the stator 22 with a slight gap and rotates inside the stator 22. The rotor 24 passes through the center and extends in the vertical direction. It is fixed to the shaft 16 by shrink fitting.

The stator 22 has a laminated body 26 in which donut-shaped electromagnetic steel sheets are laminated, and a stator coil 28 wound around the teeth of the laminated body 26 by a direct winding (concentrated winding) method. . The rotor 24 is also formed of a laminated body 30 of electromagnetic steel plates, like the stator 22.

The rotary compression element 32 includes a cylinder 40.
A roller 48 fitted to an eccentric portion 44 provided on the rotary shaft 16 to rotate eccentrically in the cylinder 40;
A vane (not shown) that abuts against the cylinder 40 to partition the inside of the cylinder 40 into a low pressure chamber side and a high pressure chamber side, and a support that also serves as a bearing for the rotary shaft 16 by closing the upper opening surface and the lower opening surface of the cylinder 40. It is composed of an upper support member 54 and a lower support member 56 as members.

The cylinder 40 is mounted between the container body 12A of the closed container 12 and the bottom portion 12C. In this case, the cylinder 4 as the outer peripheral portion of the rotary compression element 32
The outer peripheral portion 0 (portion located at the peripheral portion) 0 is expanded in the axial direction (vertical direction) of the closed container 12, and the inside of the expanded outer peripheral portion 43 has the electric element 14 side and the opposite side. Thread groove 13 of container body 12A and bottom portion 12C
A screw groove 41 is formed which is screwed into each of A and 13C.

The cylinder 40 is placed in the closed container 12
When it is attached to the bottom of the container body 12A, the thread groove 13A formed on the lower portion of the container body 12A and the thread groove 41 formed on the electric element 14 side of the cylinder 40 are screwed together.
13C and the screw groove 41 formed on the opposite side of the cylinder 40 from the electric element 14 are screwed together. by this,
The cylinder 40 is attached by being sandwiched between the container body 12A and the bottom portion 12C of the closed container 12. Then, in this state, the entire peripheral surface of the outer peripheral portion 43 of the cylinder 40 is covered with the closed container 1.
2 exposed to the outside.

In this way, the thread groove 41 of the cylinder 40, the thread groove 13A formed in the container body 12A, and the bottom portion 1
Since the cylinder 40 is fixed to the closed container 12 by screwing with the thread groove 13C formed in 2C,
The closed container 12 and the cylinder 40 can be attached without shrink fitting or welding. Therefore, the closed container 12 and the cylinder 40 may be distorted by heat generated during welding,
This makes it possible to avoid the inconvenience that the cylinder 40 is inclined and attached.

As a result, the cylinder 40 and the closed container 1
When setting the clearance such as 2, it is not necessary to consider the distortion of the cylinder 40 and the closed container 12 due to the heat at the time of welding and the like, so that the dimension management of the cylinder 40 and the closed container 12 can be easily performed. become. This allows
It is possible to reduce the production cost of each component.

Further, the rotation of the roller 48 which eccentrically rotates in the cylinder 40 causes noise, and the rotation shaft 16 tilts, which causes the rotor 24 of the electric element 14 to rotate.
It becomes possible to eliminate the inconvenience in which the gap is formed due to the tilting of the stator and the stator 22, and the gap between the stator and the stator 22 becomes non-uniform, causing suction failure and deteriorating the performance.

Further, the inside of the closed container 12 has a high pressure as will be described later, but this pressure pushes the container body 12A and the bottom portion 12C of the closed container 12 inside the outer peripheral portion 43 of the cylinder 40. And closed container 12
The sealing property between them is also improved, and it is possible to prevent gas leakage from between the screw grooves 13A and 13C and the screw groove 41.

Further, since the cylinder 40, the container body 12A of the closed container 12 and the bottom portion 12C are joined by screwing, separation and disassembly are improved at the time of maintenance and disposal of the compressor 10.

This makes it possible to improve workability during maintenance. Further, even after the disposal, the separability / decomposability of the compressor 10 is improved, and the number of reusable parts is increased, so that the recyclability is remarkably improved.

Incidentally, these screw grooves 13A, 13C and 41
Is grooved so as to be tightened in the direction opposite to the rotation direction of the rotor 24. That is, due to the rotation of the rotor 24, a force (reaction torque) that tries to rotate in the opposite direction to the rotor 24 is applied to the stator 22. Here, by grooving so that the stator 22 is tightened in the direction of rotation,
When the compressor 10 is operated, particularly when the compressor 10 is started, the cylinder 40, the container body 12A, and the bottom portion 12C.
The screwing with will be tightened. This makes it possible to improve reliability and durability.

A suction passage 60 communicating with the low pressure chamber side in the cylinder 40 at the suction port is formed in the cylinder 40. This suction passage 60 is provided with a refrigerant introduction pipe 94 described later.
The refrigerant gas is sucked into the cylinder 40 from the refrigerant introduction pipe 94 through the suction passage 60 and the suction port.

The refrigerant gas compressed in the cylinder 40 is discharged from the discharge port 61 formed in the support member 54 to the discharge muffling chamber 62 formed on the electric element 14 side of the support member 54. The discharge muffling chamber 62 has a hole at the center through which the rotating shaft 16 and the upper supporting member 54 that also serves as a bearing for the rotating shaft 16 penetrates and covers the electric element 14 side of the upper supporting member 54. It is configured within 63. Then, the refrigerant gas discharged to the discharge muffling chamber 62 is discharged to the electric element 14 side of the closed container 12.

Further, one end of the above-mentioned refrigerant introduction pipe 94 for introducing the refrigerant gas into the cylinder 40 is inserted and connected to the suction passage 60 of the cylinder 40, and one end of this refrigerant introduction pipe 94 is connected to the suction passage 60 of the cylinder 40. Communicate with. In this case, the outer peripheral portion 43 of the cylinder 40 is the closed container 1 as described above.
Since it is exposed to the outside of the cylinder 2, even when the refrigerant introduction pipe 94 is connected, the refrigerant introduction pipe 94 can be directly inserted into the cylinder 40 and connected without using a collar or the like which has been conventionally required. . As a result, the pipe connection work is facilitated, and the mounting workability can be improved. The other end of the refrigerant introduction pipe 94 has an accumulator 146.
Is attached to the lower end of.

The accumulator 146 is a tank for separating the suction refrigerant into gas and liquid, and is the container body 1 of the closed container 12.
It is attached to a bracket 147 on the closed container side, which is welded and fixed to the upper side surface of 2A.

A refrigerant discharge pipe 96 is attached to the end cap 12B that closes the upper opening of the container body 12A of the closed container 12, and one end of this refrigerant discharge pipe 96 communicates with the inside of the closed container 12. There is. The refrigerant discharge pipe 96 is connected to an external radiator or the like (not shown). Further, a mounting pedestal 110 is provided on the bottom of the bottom portion 12C of the closed container 12.

Next, the rotary compressor 1 having the above-described structure is used.
The operation of 0 will be described. When the stator coil 28 of the electric element 14 is energized via the terminal 20 and wiring (not shown), the electric element 14 is activated and the rotor 24 rotates.

The rotation of the rotor 24 causes the rotation shaft 1 to rotate.
The roller 4 fitted to the eccentric portion 44 provided integrally with the roller 6
8 eccentrically rotates in the cylinder 40. As a result, the refrigerant gas is sucked from the refrigerant discharge pipe 94 to the low pressure chamber side of the cylinder 40 of the rotary compression element 32 via the suction passage 60 and the suction port.

The refrigerant gas sucked into the low-pressure chamber side of the cylinder 40 is compressed to a high pressure by the operation of the roller 48 and a vane (not shown), and is discharged from the high-pressure chamber side of the cylinder 40 to the discharge muffling chamber 62 from the discharge port 61. . Then, as described above, the refrigerant gas is discharged from the discharge muffling chamber 62 into the closed container 12, passes through the gap formed between the rotor 24 and the stator 22 and reaches the upper portion inside the closed container 12, and the refrigerant discharge pipe. From 96, it will flow into an external radiator or the like.

Thus, the container body 12 of the closed container 12
A, the bottom portion 12C and the cylinder 40 are screw grooves 13A,
13C and 41, respectively, and thread grooves 13A and 13A
C fixes the cylinder 40 to the closed container 12 by being screwed together with the thread groove 41 of the outer peripheral surface 43 of the cylinder 40. Therefore, the closed container 12 and the cylinder 40 are distorted by heat, and the cylinder 40 It becomes possible to avoid the inconvenience of being inclined and attached.

Thus, when setting the clearance of the cylinder 40 or the like, it is not necessary to consider the distortion of the cylinder 40 and the closed container 12 due to heat at the time of welding or the like. It will be easy to do. This makes it possible to reduce the production cost of each component.

Furthermore, the inconvenience that noise is generated by the rotation of the roller 48 which is eccentrically rotated in the cylinder 40, and the rotating shaft 16 mounted inside the cylinder 40 is tilted, whereby the rotor 24 of the electric element 14 is tilted. Stator 2
It is possible to eliminate the inconvenience that the gaps formed between the two and the two become non-uniform, causing suction failure and deteriorating the performance.

Further, the closed container 12 is separated into a container body 12A located on the electric element 14 side of the cylinder 40 and a bottom portion 12C located on the opposite side, and screw grooves 13A and a screw groove 13A are formed on the outer surfaces of the container body 12A and the bottom portion 12C. 13C is formed, the thread groove 41 of the cylinder 40 is
0 is formed on the inner side of the outer peripheral portion 43 on the side of the electric element 14 and on the opposite side thereof, and both screw grooves 41 of the cylinder 40,
Since the screw grooves of the container body 12A and the bottom portion 12C of the closed container are respectively screwed into 41, and the outer peripheral portion 43 of the cylinder 40 is exposed to the outside of the closed container 12, the closed container 12
The internal pressure is the container body 12A and the bottom portion 1 of the closed container 12.
Since 2C is pressed against the inside of the outer peripheral portion 43 of the cylinder, the sealability of the compressor is improved, and leakage from the screw grooves 13A, 13C and 41 can be prevented.

Furthermore, since the cylinder 40, the container body 12A of the closed container 12 and the bottom portion 12C are screwed and joined together, the separation and disassembly performance at the time of maintenance and disposal of the compressor become good. This makes it possible to improve workability during maintenance. Further, even after the disposal, the separability / decomposability of the compressor 10 is improved, and the number of reusable parts is increased, so that the recyclability is remarkably improved.

Further, since the outer peripheral surface 43 of the cylinder 40 is exposed to the outside of the closed container 12, the connection work such as the pipe connection from the outside can be facilitated and the mounting workability can be improved. .

Furthermore, the thread grooves 13A, 13C and 41
Is grooved so as to be tightened in the direction opposite to the rotation direction of the rotor 24, so that the screwing of the cylinder 40 with the container body 12A and the bottom portion 12C continues to be tightened by the operation of the compressor 10. As a result, reliability and durability can be improved.

Next, another embodiment of the rotary compressor of the present invention will be described in detail with reference to FIG. FIG. 3 is a vertical sectional side view of the internal high pressure type rotary compressor 10 in this case.

It is to be noted that, in FIG. 3, those denoted by the same reference numerals as those in FIGS. 1 and 2 have the same or similar actions. In FIG. 3, 100 is a suction passage 60 of the cylinder 40 for introducing the refrigerant gas into the cylinder 40.
Is a refrigerant introduction pipe as a refrigerant pipe connected to. One end of the refrigerant introducing pipe 100 is connected to the suction passage 60 of the cylinder, and the other end is connected to the lower end of the accumulator 146.

As shown in FIG.
A thread groove portion 101 is formed as shown in FIG. Also,
The cylinder 40 is formed with a thread groove portion 102 which is screwed into a thread groove portion 101 provided at one end of the refrigerant introduction pipe 100.

Incidentally, although not shown, a thread groove portion is similarly formed on the other end of the refrigerant introducing pipe 100, that is, on the side where it is attached to the accumulator 146, and the thread groove portion formed on the accumulator 146 is screwed together and attached. Good.

Then, the refrigerant introduction pipe 100 is connected to the cylinder 40.
When it is attached to the cylinder 40, the thread groove portion 102 formed on the cylinder 40 and the thread groove portion 10 formed on the refrigerant introduction pipe 100
Screw 1 and. As a result, the refrigerant introducing pipe 100 is attached to the cylinder 40.

Also, when the accumulator 146 is attached to the refrigerant introducing pipe 100, a screw groove portion (not shown) formed on the accumulator 146 and a screw groove portion (not shown) formed on the other end of the refrigerant introducing pipe 100 are screwed together. It is attached by.

In this way, the thread groove portion 1 of the refrigerant introducing pipe 100
01 and the thread groove portion 102 of the cylinder 40 are screwed to fix the refrigerant introduction pipe 100 to the cylinder 40, so that the cylinder 40 and the refrigerant introduction pipe 100 can be attached without shrink fitting or welding. Like Therefore, it is possible to avoid the inconvenience that the cylinder 40 is distorted by the heat during welding or the refrigerant introduction pipe 100 is inclined and attached.

Further, the pipe connecting work is facilitated and the mounting workability can be improved.

Further, since the cylinder 40 and the refrigerant introduction pipe 100 are screwed and joined together, the separation / decomposition property at the time of maintenance or compressor disposal is improved. This makes it possible to improve workability during maintenance. Even after the disposal, since the separability / decomposability of the compressor 10 is improved, the number of reusable parts is increased, so that the recyclability is remarkably improved.

Here, the coolant introduction pipe 100 and the cylinder 40 are provided with the thread groove portions 101 and 102 and are connected by screwing them together, but the invention is not limited to this. Refrigerant discharge pipe 96 connected
The present invention is also effective when a thread groove portion that is screwed into each other is provided in the closed container 12 and the closed container 12.

Next, another embodiment of the rotary compressor of the present invention will be described in detail with reference to FIG. FIG. 5 shows a vertical sectional side view of the internal high pressure type rotary compressor 10 in this case. In addition, in FIG. 5, FIG. 1, FIG.
4 and those having the same reference numerals as those in FIG. 4 have the same or similar effects.

In FIG. 5, the cylinder 140 and the upper support member 154 are mounted between the container body 12A and the bottom portion 12C of the closed container 12. In this case, the cylinder as the outer peripheral portion of the rotary compression element 32 and the outer peripheral portions (portions located at the peripheral edge portions) 143 and 155 of the upper support member 154 are expanded in the axial direction (vertical direction) of the closed container 12, The container main body 12A is provided on the inside of the expanded outer peripheral portions 143 and 155 on the side of the electric element 14 and on the opposite side.
And screw grooves 156 and 141 which are screwed into the screw grooves 13A and 13C of the bottom portion 12C, respectively.

When attaching the cylinder 140 and the upper support member 154 to the closed container 12, the peripheral portions of the cylinder 140, the upper support member 154 and the lower support member 56 are fixed from the upper side by the main bolts 78. hand,
Further, the rotary compression element 32 is assembled by fixing it from below with the main bolt 119.

Then, the screw groove 13A formed in the lower portion of the container body 12A and the screw groove 156 formed on the electric element 14 side of the upper support member 154 are screwed together, and the screw groove 13C of the bottom portion 13C is Electric element 1 of cylinder 140
The screw groove 141 formed on the opposite side to the screw No. 4 is screwed.
Accordingly, the cylinder 140 and the upper support member 154
Is attached by being sandwiched between the container body 12A and the bottom portion 12C of the closed container 12. Then, in this state, the outer peripheral portions 143 and 1 of the cylinder 140 and the upper support member 154 are
The entire peripheral surface of 55 is exposed to the outside of the closed container 12.

In this way, the screw grooves 156 and 141 of the cylinder 140 and the upper support member 154 are screwed into the screw groove 13A formed on the container body 12A and the screw groove 13C formed on the bottom portion 12C, so that the cylinder 140 and Since the upper support member 154 is fixed to the closed container 12, the closed container 12, the cylinder 140, and the closed container 1 are provided.
2 and the upper support member 154 can be attached without shrink fitting or welding. Therefore, the closed container 12, the cylinder 140 and the closed container 12 are heated by heat during welding.
Therefore, it is possible to avoid the disadvantage that the upper support member 154 is distorted or is inclined and attached.

In each of the above-described embodiments, only the cylinder 40 is exposed from the closed container 12, or the cylinder 140 and the upper support member 154 are exposed from the closed container 12, and the screw groove 41 is formed in the connecting portion with the closed container 12. , 141, 156
Although not limited to this, for example, only the upper support member as the main frame is exposed from the closed container 12, and the outer peripheral surface of the upper support member as the outer peripheral surface of the rotary compression element is connected to the closed container. This is also effective when a thread groove is provided in the portion and screwed together.

In each of the above embodiments, the leaking of the refrigerant gas in the closed container 12 is prevented by screwing the connecting portion between the closed container 12 and the cylinder.
In order to improve the sealability and durability between the cylinder and
An airtight seal member such as packing or gasket is provided at the connecting portion between the closed container 12 and the cylinder 40, an adhesive is attached to the connecting portion between the rotary compression element and the closed container 12, the rotary compression element and this rotary compression element. The sealed container 12 that is connected to the
Leakage of the refrigerant gas inside may be prevented.

Further, in each of the above embodiments, the closed container 12 includes the container body 12A, the end caps 12B and the bottom portion 12.
However, the present invention is not limited to this and is also effective when the container body 12A and the end cap 12B are integrated. In this case, it is not necessary to weld the container body 12A and the end cap 12B, and the process of applying heat to the closed container 12 includes welding and fixing the terminal 20, welding and fixing the refrigerant discharge pipe, connecting the bracket 147, and burning the stator 22. After the fitting is completed and the connecting work is completed, the screwing work of the cylinder 40 can be performed, so that the distortion of the cylinder due to heat can be avoided as much as possible.

Further, although the concentrated winding type DC motor is used as the electric element in each of the above embodiments, the present invention is not limited to this, and the present invention is also applicable to the case where another motor such as an AC motor or a distributed winding type motor is used. Is valid.

Furthermore, although the single cylinder vertical rotary compressor 10 is used in each of the above embodiments, the present invention is not limited to this, and the present invention can be applied to a multi-cylinder rotary compressor, a horizontal rotary compressor, a reciprocating compressor or a scroll compressor. It is valid.

[0068]

As described in detail above, according to the present invention, in a compressor having a hermetic container provided with a rotary compression element and an electric element for driving the rotary compression element, the rotary compression element is provided in the hermetic container. The cylinder includes a fixed cylinder, a support member that closes an opening surface of the cylinder, and a roller that is eccentrically rotated in the cylinder by being fitted into an eccentric portion formed on the rotating shaft of the electric element. The compression element is provided with a thread groove, and each thread groove is screwed into each other to fix the rotary compression element to the closed container. There is no need to fix it.

As a result, it is possible to avoid the disadvantage that the hermetic container and the rotary compression element are distorted by the heat when the rotary compression element is assembled, and the rotary compression element is inclined and attached, and the sealing performance is deteriorated. It is possible to prevent the deterioration of the performance due to.

Furthermore, when setting the clearance of the cylinder and the like, it is not necessary to consider the distortion of the cylinder and the closed container due to the heat at the time of welding, so that the dimension control of the cylinder and the closed container can be performed easily. become. This makes it possible to reduce the production cost of each component.

Further, since the rotary compression element and the hermetically sealed container are screwed and joined together, the separation / decomposability at the time of maintenance and disposal of the compressor is also improved.

As a result, workability during maintenance can be improved. Even after the disposal, the separability / decomposability of the compressor is improved, and the number of parts that can be reused is increased, so the recyclability is significantly improved.

According to the invention of claim 2, in addition to the above, the closed container is separated into a portion located on the electric element side of the rotary compression element and a portion located on the opposite side, and the thread groove is formed on the outer surface of each portion. At the same time, the thread groove of the rotary compression element is formed on the inner side of the outer peripheral portion of the rotary compression element on the side of the electric element and on the opposite side thereof. Since the grooves are respectively screwed and the outer peripheral surface of the rotary compression element is exposed to the outside of the closed container, the pressure inside the closed container presses each part of the closed container to the inside of the outer peripheral portion of the rotary compression element. Become.

As a result, the disadvantage that the sealing performance of the compressor deteriorates due to the high pressure in the closed container can be eliminated. Further, since the outer peripheral surface of the rotary compression element is exposed to the outside of the closed container, connection work such as pipe connection from the outside can be facilitated and productivity can be improved.

According to the invention of claim 3, in addition to the above, each screw groove is provided with a stator in which the electric element is attached to the inner peripheral surface of the hermetic container, and a rotation which is installed inside the stator and rotates in the stator. Since the screw groove is composed of a child and each screw groove is tightened in the direction opposite to the rotation direction of the rotor, the rotary compression element and the hermetic container will continue to be tightened by the operation of the compressor, and Therefore, the reliability and durability can be improved.

According to a fourth aspect of the present invention, in a compressor in which a closed container is provided with an electric element and a rotary compression element driven by the electric element, the rotary compression element includes a cylinder fixed to the closed container. The cylinder includes a support member that closes the opening surface of the cylinder and a roller that is eccentrically rotated in the cylinder by being fitted to an eccentric portion formed on the rotary shaft of the electric element. The refrigerant pipe for connecting the rotary compression element and / or the hermetically sealed container, and the refrigerant pipe fixed to these are respectively provided with screw groove portions, and the screw groove portions are screwed into each other. It becomes unnecessary to fix the refrigerant pipe to the rotary compression element and / or the closed container by welding or welding.

Thus, when the refrigerant pipe is attached to the rotary compression element, it is possible to avoid the disadvantage that the hermetically sealed container, the rotary compression element and the refrigerant pipe are distorted by heat or the refrigerant pipe is inclined and attached. Become.

Further, since the refrigerant pipe and the rotary compression element and / or the airtight container are screwed and joined, the separation / decomposition property at the time of maintenance or disposal of the compressor is also improved.

According to the invention of claim 5, in addition to the invention of claim 4, the rotary compression element and the hermetic container are provided with thread grooves, respectively, and by screwing each thread groove into each other, the rotary compression element is sealed with the hermetic container. Therefore, it is possible to avoid inconvenience that the closed container, the rotary compression element and the refrigerant pipe are distorted by the heat when the rotary compression element and the refrigerant pipe are assembled and the rotary compression element is inclined and attached.

The hermetically sealed container and the compression element according to the sixth aspect of the present invention each have a thread groove, and the threaded groove is screwed into each other to fix the compression element to the airtight container. This eliminates the need to secure the compression element in a closed container.

As a result, it is possible to avoid the inconvenience that the closed container and the compression element are distorted by the heat at the time of assembling the compression element, or the compression element is inclined and attached, and the performance due to the deterioration of the sealing performance and the like is avoided. It is possible to prevent deterioration.

Further, since the compression element and the hermetically sealed container are screwed and joined together, the separation / decomposition property at the time of maintenance and disposal of the compressor is also improved.

As a result, workability during maintenance can be improved. Even after the disposal, the separability / decomposability of the compressor is improved, and the number of parts that can be reused is increased, so that the recyclability is significantly improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a rotary compressor according to an embodiment of the present invention.

FIG. 2 is an enlarged view of an outer peripheral portion of the cylinder of FIG.

FIG. 3 is a vertical sectional side view of a rotary compressor according to another embodiment of the present invention.

FIG. 4 is an enlarged view of a connection portion of the refrigerant discharge pipe of FIG. 3 with a cylinder.

FIG. 5 is a vertical sectional side view of a rotary compressor according to another embodiment of the present invention.

[Explanation of symbols]

10 Rotary compressor 12 airtight container 12A container body 12B end cap 12C bottom part 13A, 13C thread groove 14 Electric elements 16 rotation axes 20 terminals 22 Stator 24 rotor 26 laminate 28 Stator coil 30 stacks 32 rotary compression element 40 cylinders 41 screw groove 43 outer circumference 44 Eccentric part 48 Roller 54 Upper support member 56 Lower support member 60 suction passage 94 Refrigerant introduction pipe 96 Refrigerant discharge pipe 110 Mounting base

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor, Yoko Isamu             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. F-term (reference) 3H003 AA05 AB04 AC03 CD01 CD07                 3H029 AA04 AA13 AB03 AB09 BB32                       CC03 CC09 CC22

Claims (6)

[Claims] 1. A compressor comprising a hermetic container provided with a rotary compression element and an electric element for driving the rotary compression element, wherein the rotary compression element comprises a cylinder fixed to the hermetic container and a cylinder of the cylinder. A support member that closes the opening surface, and a roller that is fitted to an eccentric portion formed on the rotation shaft of the electric element and rotates eccentrically in the cylinder are provided, and the hermetic container and the rotary compression element have a thread groove. A compressor characterized in that the rotary compression element is fixed to the hermetic container by screwing the respective thread grooves into each other. 2. The closed container is separated into a portion located on the electric element side of the rotary compression element and a portion located on the opposite side, and the thread groove is formed on the outer surface of each portion, and The thread groove of the rotary compression element is formed on the inside of the outer peripheral portion of the rotary compression element on the side of the electric element and the opposite side thereof, and the thread grooves of the rotary container are provided with the thread grooves of the respective portions of the hermetic container. 2. The compressor according to claim 1, wherein the rotary compression elements are screwed together and the outer peripheral surface of the rotary compression element is exposed to the outside of the closed container in that state. 3. The electric element is installed inside the stator, the stator being attached to the inner peripheral surface of the closed container,
The rotor is configured to rotate within the stator, and each of the screw grooves is a groove that is tightened in a direction opposite to a rotation direction of the rotor. 2 compressors. 4. A compressor comprising a closed container provided with an electric element and a rotary compression element driven by the electric element, wherein the rotary compression element is a cylinder fixed to the closed container, and the cylinder. And a roller that is fitted to an eccentric portion formed on the rotary shaft of the electric element and rotates eccentrically in the cylinder, and draws out the refrigerant into the cylinder of the rotary compression element. A refrigerant pipe for entering is connected, the rotary compression element and / or the hermetic container, and the refrigerant pipe fixed to these are each provided with a thread groove portion, and each thread groove portion is screwed into each other. Compressor. 5. The rotary compression element and the hermetic container are each provided with a thread groove, and the rotary compression element is fixed to the hermetic container by screwing the thread grooves into each other. Compressor. 6. A compressor comprising a hermetic container provided with a compression element and a drive element for driving the compression element, wherein the hermetic container and the compression element each have a thread groove, and the thread grooves are screwed to each other. Therefore, the compressor is characterized in that the compression element is fixed to a closed container.