JPH0932752A - Scroll type compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scroll type compressor which ensures a compliance function, provides high compression efficiency, and improves reliability by suppressing the machining for a fixed scroll and a support frame to the minimum extent and an increase of weight of them. SOLUTION: A scroll type compressor is provided with a back pressure guide means and a support means 14 for compliance function. The support means for compliance function is provided with a support frame 2 which supports a fixed scroll end plate section 12a, a recessed section 29 provided in the support frame, a hollow guide pin 24 which is fitted and fixed in the fixed scroll end plate section, a part of which protrudes from the fixed scroll, and is inserted into the recessed section in play in such a manner that it can slide freely, and a stopper pin 23 which is provided with a rod section 27 which is inserted into a hollow section 24a of the guide pin in play in such a manner that it can slide freely, of which tip is attached and fixed on a face of the recessed section, and regulates the travel of the fixed scroll in the axial direction of the required amount or more.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll type compressor used as a compressor constituting a refrigeration cycle of an air conditioner, for example.

[0002]

2. Description of the Related Art In a compressor constituting a refrigeration cycle of an air conditioner, compared with a conventional rotary compressor,
There is a tendency to use scroll compressors that have extremely low operating noise, do not require suction valves and discharge valves, and have a small number of parts, and that have good compression performance.

Conventionally, in a scroll compressor, as shown in FIG. 5, the spiral blade of the fixed scroll A and the spiral blade of the orbiting scroll B are meshed with each other, and these blades and each scroll blade are engaged. A compression space a is formed with the end plate portion of the above, and the orbiting scroll B is caused to orbit, so that the refrigerant gas that is the gas to be compressed is sucked into the compression space a, compressed and discharged.

[0004]

The compression space a of the scroll compressor is not always in a normal pressure state. For example, in the case of the liquid back operation in which the liquid refrigerant is sucked and compressed, the compression space a falls into an abnormally increased pressure state. If this state continues for a long time, a large stress is applied to each scroll wing, and there is a risk that it will eventually break.

Therefore, recently, there is a so-called compliance function in which the fixed scroll A is supported so as to be movable in the axial direction, and when the compression space is in an abnormally increased pressure state, the gap with the orbiting scroll is expanded to release gas. It came to be adopted.

However, in a normal operating state, the fixed scroll A must maintain a normal clearance with the orbiting scroll B, so that the fixed scroll A is supported movably in the axial direction and the rear surface of the fixed scroll A is fixed. It is common to generate gas pressure on the side.

As shown in the figure, the support mechanism C for the fixed scroll A, which has a compliance function, is provided with a plurality of hook holes b in a support frame D for supporting the fixed scroll A. A guide pin d protruding from the fixed scroll A is loosely inserted.

A hollow spacer e is loosely inserted in the fixed scroll A, and its lower end is placed on the support frame D. A bolt f is inserted into the hollow portion of the spacer e, and this tip screw portion is screwed to the support frame D. A washer w is inserted through the upper end head portion of the bolt f and is interposed between the upper end portion of the spacer e and the washer w.

An intermediate pressure chamber g is provided on the back side of the fixed scroll A, and a gas pressure is applied to the intermediate pressure chamber g. In the normal operation state, the axial movement of the fixed scroll A is regulated. However, when an abnormal pressure rise occurs in the compression space a, the guide pin d guides the fixed scroll A along the hook hole b to rotate. The gap with the scroll B is enlarged to release the gas.

A so-called compliance function is exhibited to prevent a large stress from being applied to the wings of the scrolls A and B. The moving amount (back amount) of the fixed scroll A is regulated by the head portion of the bolt f via the washer w.

In this way, a reliable compliance function is achieved, but on the other hand, since the means for guiding the fixed scroll A and the means for regulating the back amount are separately provided, it is troublesome to process. Hang up.

That is, the fixed scroll A and the support frame D are provided with mounting holes for the guide pins d and hook holes b, and holes or screw holes for mounting the bolts f and the spacers e for restricting the back amount. It is necessary to drill holes, which increases the number of steps.

In order to provide these holes, a large area is required for the flange portion of the fixed scroll A and the support frame D. As a result, the weight of the fixed scroll A and the support frame D is increased, which adversely affects the cost.

The present invention has been made in view of the above circumstances, and an object thereof is to minimize processing of the fixed scroll and the support frame and to suppress the increase in weight of these, thereby providing a compression space. A so-called compliance function is secured to support the fixed scroll so that it can move smoothly in the axial direction when an abnormal pressure rise occurs.
An object of the present invention is to provide a scroll compressor that can achieve high compression efficiency and improved reliability.

[0015]

In order to satisfy the above object, the scroll type compressor of the first invention is as follows.
The spiral wing of the fixed scroll and the spiral wing of the orbiting scroll are meshed with each other, and a compression space is formed between these wing and the end plate of each scroll wing, causing the orbiting scroll to orbit and compress. In a device that sucks a compressed gas into a space, compresses it, and discharges it, a back pressure guide means that applies a gas pressure to the back side of the fixed scroll and restricts the axial movement of the fixed scroll in a normal operating state, The fixed scroll is movably supported in the axial direction, and when the compression space is in an abnormally increased pressure state in which it exceeds the gas pressure by the back pressure guide means, the fixed scroll is allowed to move in the axial direction to form the orbiting scroll. Equipped with support means for compliance function that widens the clearance and releases the gas in the compression space,
The compliance function support means includes a support frame that supports an outer peripheral portion of the fixed scroll end plate portion, a recess provided in a support portion of the fixed scroll end plate portion of the support frame, and a fixed scroll end plate portion. , A hollow guide pin, a part of which protrudes from the fixed scroll and is slidably inserted into the recess, and is slidably inserted into the hollow part of the guide pin and fixedly mounted on the support frame recess surface. And a stopper pin for restricting the movement of the fixed scroll in the axial direction beyond the required amount.

According to a second aspect of the present invention, the support frame according to the first aspect is provided with a screw hole portion on the concave surface, and the stopper pin is screwed at the tip thereof to the screw hole portion of the concave surface of the support frame. It is characterized in that the screw diameter is smaller than the diameter of the loosely inserted portion into the hollow portion of the guide pin.

According to a third aspect of the present invention, in the stopper pin according to the first aspect, the base end portion protruding from the guide pin is larger than the diameter dimension of the guide pin, and a predetermined gap is provided between the guide pin upper end portion. It is characterized in that it is provided with a stopper portion that regulates the axial back amount of the fixed scroll.

As a fourth aspect, in the stopper pin according to the first aspect, a hollow spacer whose outer diameter is set to be loosely inserted into the hollow portion of the guide pin, and a hollow spacer inside the spacer. A bolt that is inserted, the tip screw part protrudes from the spacer lower end part, and the base end head part protrudes from the spacer upper end part, and a washer that is interposed between the base end head part of the bolt and the spacer upper end part. Is characterized by.

In order to satisfy the above object, the scroll type compressor of the second invention is, as a fifth aspect, characterized in that the spiral blade of the fixed scroll and the spiral blade of the orbiting scroll are meshed with each other, and these blades are engaged with each other. Part and the end plate part of each scroll blade form a compression space, and the orbiting scroll is caused to orbit to suck the compressed gas into the compression space and compress and discharge it. And the back pressure guide means for restricting the axial movement of the fixed scroll in the normal operating state and the fixed scroll movably supported in the axial direction, and the compression space exceeds the gas pressure by the back pressure guide means. Supports compliance function that allows the fixed scroll to move in the axial direction to widen the clearance with the orbiting scroll and release the gas in the compressed space when the pressure rises abnormally. The compliance function supporting means includes a step, and a guide means for guiding the fixed scroll in the axial direction when the compression space is in an abnormally increased pressure state, and a movement of the fixed scroll more than necessary amount at this time. It is characterized in that the regulating means for regulating is provided in one place.

By providing the means for solving the above problems, the invention of claim 1 can reduce the processing man-hours for the fixed scroll and the support frame, and can reduce the size and weight. The guide pin is slidably fitted in the concave portion of the frame so that the stopper pin is not applied with a horizontal force, and the compliance function is highly reliable.

According to the second aspect of the present invention, the axial movement amount of the fixed scroll can be easily set by the size of the free insertion portion of the stopper pin. According to the third aspect of the present invention, the axial movement amount of the fixed scroll can be easily set by the stopper means of the stopper pin.

In the invention of claim 4, the movement amount of the fixed scroll can be freely set by the cylindrical spacer, and the standard bolt can be used as it is. According to the fifth aspect of the present invention, it is possible to reduce the number of processing steps for the fixed scroll and the support frame and to reduce the size and weight.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a scroll compressor used in, for example, a refrigeration system. In the figure, reference numeral 1 denotes a closed case, and a support frame 2 is provided in an upper portion inside the closed case 1, and a rotary shaft 3 is rotatably supported.

The rotary shaft 3 has a compression mechanism 4 which will be described later.
Is connected, and an electric motor unit 7 including a stator 5 and a rotor 6 is provided in the lower portion. A lower end portion of the rotary shaft 3 projects downward from the electric motor portion 7 and is rotatably supported by a sub bearing 8 attached to the sealed case 1.

An oil reservoir O for collecting lubricating oil is formed in the inner bottom of the closed case 1, and the lower end of the rotary shaft 3 is immersed therein. An oil supply pump P is provided at the lower end of the rotary shaft 3, and as the rotary shaft 3 rotates, the oil sump portion O
Of the lubricating oil is sucked up along the oil supply passage R provided in the rotary shaft 3 to supply oil to each sliding portion of the upper end compression mechanism portion 4 of the rotary shaft 3.

The compression mechanism section 4 includes the support frame 2
The orbiting scroll 11 is rotatably supported via the Oldham ring 10, a fixed scroll 12 meshing with the orbiting scroll 11, a back pressure guide means 13 for applying a back pressure to the fixed scroll 12, and a specific condition. It is composed of a compliance function supporting means 14 that supports the fixed scroll 12 so as to be movable in the axial direction.

The orbiting scroll 11 has the rotating shaft 3
It is composed of an end plate portion 11a having a boss portion 11c that engages with the upper end eccentric portion 3a, and a spiral wing portion 11b integrally provided on the upper surface side of the end plate portion 11a.

The fixed scroll 12 has an end plate portion 12a.
And a spiral wing 12 that is integrally projectingly provided on the lower surface of the end plate 12a and meshes with the wing 11b of the orbiting scroll 11.
b.

A pair of compression spaces a are formed by the end plates 11a and 12a and the blades 11b and 12b of the orbiting and fixed scrolls 11 and 12, and a refrigerant gas, which is a compressed gas, is taken in from the peripheral end side. , It is possible to perform a compression action by moving to the center side and reducing the volume thereof.

The upper surface of the fixed scroll end plate 12a is formed in a concave shape, and the compression space a is formed in the center thereof.
Discharge port 15 penetrating so as to communicate with the spiral center of
Is provided.

On the upper side of the fixed scroll 12, the back pressure plate 1
6 are provided. That is, the back pressure plate 16 is mounted and fixed in the closed case 1, and divides the inside of the case into an upper end space and a lower space.

The back pressure plate 16 is provided with a valve seat portion 18 having a check valve 17 at the axial center thereof, and communicates with the discharge port 15. In other words, the discharge port 15 has a check valve of 1
It communicates with the upper space of the back pressure plate 16 via the valve seat portion 18 provided.

The concave portion provided around the discharge port 15 of the fixed scroll 12 and the back pressure plate valve seat portion 18 form a high pressure discharge chamber 19 into which the high pressure gas discharged from the compression space a is guided.

The back pressure plate 16 and the fixed scroll end plate portion 12a form an intermediate pressure chamber 20 which is a sealed space. The intermediate pressure chamber 20 is concentrically provided around the outer periphery of the high pressure discharge chamber 19.

An intermediate pressure introducing hole 22 is provided at a predetermined position of the fixed scroll end plate portion 12a so as to penetrate the end plate portion 12a so as to connect the intermediate pressure chamber 20 and the compression space a. The back pressure plate 16, the high-pressure discharge chamber 19, the intermediate pressure introduction hole 22 and the intermediate pressure chamber 20 constitute the back pressure guide means 13 for constantly exerting an intermediate gas pressure on the back side of the fixed scroll 12. It

On the other hand, the compliance function support means 1
As shown in FIG. 2, 4 includes a stopper pin 23, a guide pin 24, a fixed scroll 12 that supports the stopper pin 23 and the guide pin 24, and a support frame 2.

The stopper pin 23 comprises a bolt 25, a flat washer 26 and a hollow cylindrical spacer 27, as shown in the right column of FIG. These bolts 25 and washers 26 may be commercially available products, and the hollow spacer 27
The outer dimensions are set and the total length (L + ΔL ₂ )
A commercially available product may be used as long as it can be accurately delivered.

The rod 25a of the bolt 25 is inserted into the flat washer 26 and the hollow portion of the spacer 27, and the screw portion 25b formed at the lower end projects downward from the lower end surface of the spacer 27. The bolt head 25c projects from the upper end surface of the spacer 27 together with the washer 26.

The stopper pin 23 in the state where the bolt 25, the washer 26, and the spacer 27 are integrated is shown at the uppermost part of the left column in the figure. In addition, the bolt 25 and the flat washer 2
If 6 is integrated with each other by means such as welding, it will not be necessary to search for each part during assembly.

The guide pin 24 is a hollow cylinder. The diameter of the hollow portion 24a of the guide pin 24 is formed to be somewhat larger than the outer dimension of the spacer 27 that constitutes the rod portion of the stopper pin 25.

A flange portion 12c is integrally provided around the fixed scroll end plate portion 12a, and a mounting hole 28 is provided at this predetermined position so as to penetrate along the axial direction. The diameter of the mounting hole 28 is formed to be somewhat smaller than the outer diameter of the guide pin 24.

The peripheral portion of the support frame 2 serves as a support portion 2a for supporting the fixed scroll 12, and a recess 29 is provided at this predetermined position. The opening surface of the recess 29 opens to the support portion 2a and is formed to have a predetermined depth along the axial direction.

A screw hole portion 30 is provided along the axial direction from the bottom surface of the recess 29 to the bottom surface of the support portion 2a.
The screw diameter of the screw hole portion 30 is the same as the bolt screw portion 25b.
Match the screw diameter of.

The compliance function supporting means 14 composed of such components is assembled as shown in FIG. The guide pin 24 is used for the fixed scroll end plate portion 12.
It is attached and fixed to the attachment hole 28 provided in a by means such as press fitting. At this time, the upper edge of the guide pin 24 is the end plate 1
It is set so as to be depressed by the dimension ΔL _{1 with} respect to the upper surface of 2a.

The rotating shaft and the orbiting scroll 11, which are not shown here, are incorporated in the supporting frame 2, and the fixed scroll 12 is supported and fixed. Simultaneously with this operation, the guide pin 24 attached to the fixed scroll 12 and protruding from the lower surface of the fixed scroll is inserted into the recess 29 provided in the support frame 2.

The outer dimension of the guide pin 24 is smaller than the diameter dimension of the recess 29, and a gap of ΔR ₁ is formed in the inserted state. That is, the guide pin 24 is slidably inserted into the recess 29.

The stopper pin 23 in which the bolt 25, the flat washer 26 and the cylindrical spacer 27 are integrated is inserted into the hollow portion 24a of the guide pin 24,
The tip screw portion 25b is screwed into a screw hole portion 30 that is continuously provided in the recess 29.

That is, the stopper pin 23 is attached and fixed to the support frame 2, and the spacer 27 which is the rod portion.
Is inserted into the hollow portion 24a of the guide pin 24, and the upper end head portion 25c and the washer 26 portion are orbiting scroll end plate portion 12
a Project from the upper surface.

The diameter of the rod portion 27 of the stopper pin 23 is smaller than the diameter of the guide pin hollow portion 24a, and a gap of ΔR ₂ is formed in the inserted state, and the stopper pin 23 is slidably inserted into the guide pin 24. Will be done.

In this state, the fixed scroll end plate portion 12a
The total length dimension from the upper surface to the bottom surface of the concave portion 29 of the support frame 2 is L, and a gap dimension ΔL ₂ is formed between the upper surface of the fixed scroll end plate portion 12a and the washer 26 forming the stopper portion of the stopper pin 23.

As shown in FIG. 1 again, a discharge pipe 31 is connected to the upper side surface of the closed case 1, which is an upper space in the closed case 1 partitioned by the back pressure plate 16.
It communicates with a condenser (not shown) of the refrigeration system.

A suction pipe 3 is provided on the lower side surface of the closed case 1.
2 is connected to connect the lower space in the closed case 1 partitioned by the back pressure plate 16 and an evaporator (not shown) of the refrigeration system.

In the scroll compressor thus constructed, when the electric motor section 7 is energized to drive the compression mechanism section 4, low-pressure refrigerant gas is introduced from the suction pipe 32 into the closed case 1. , The space below the back pressure plate 16 is filled.

This refrigerant gas is sucked into the outer peripheral side of the compression space a formed by the orbiting scroll 11 and the fixed scroll 12. Then, as the orbiting scroll 11 orbits, the orbiting scroll 11 is gradually transferred to the central portion of the compression space a, and the space capacity is reduced, whereby the orbiting scroll 11 is compressed.

When the pressure has risen to a predetermined level, it is discharged from the discharge port 15 and once collected in the high pressure discharge chamber 19,
It is discharged into the space above the back pressure plate 16. And the discharge pipe 3
1 to an external condenser.

With the compression action in the compression space a, the high-pressure refrigerant gas discharged from the discharge port 15 once fills the high-pressure discharge chamber 19, and a high back pressure is applied to the central portion of the fixed scroll 12. Call.

Further, an intermediate-pressure gas is introduced from the compression space a into the intermediate-pressure chamber 20 through the intermediate-pressure introducing hole 22, and the intermediate-pressure chamber 20 is filled with the intermediate-pressure gas to apply the intermediate-pressure back pressure to the peripheral end portion of the fixed scroll 12. .

In this way, the back pressure guide means 13 exerts an effective back pressure on the fixed scroll 12 in the normal operating state. The fixed scroll 12 is supported by the compliance function support means 14 so as to be movable in the axial direction. However, the movement of the fixed scroll 12 in the axial direction is restricted by the action of the back pressure guide means 13, and the compression space a with the orbiting scroll 11 is compressed.
The clearance that forms the is maintained in an optimal state.

Depending on the operating conditions, the liquid refrigerant may be sucked into the compression space a, at which time the pressure is raised to an abnormally high pressure. The pressure in the compression space a exceeds the back pressure of the back pressure guide means 13, and the fixed scroll 12 moves in the axial direction.

More specifically, the guide pin 24 integrated with the fixed scroll 12 is guided by the concave portion 29 provided in the support frame 2 and floats up, and as a result, the compression space a formed with the orbiting scroll 11 is formed. The clearance of is expanded.

The abnormal high-pressure gas in the compressed space a is sealed in the closed case 1.
By escaping inward, a so-called compliance function is exerted, and the scrolls 11 and 12, especially the wings 11b and 12
The stress that b receives is eliminated.

The fixed scroll 12 during the compression operation applies a pressing force to the extent that the fixed scroll 12 does not move in the axial direction (does not rise) with respect to the thrust force generated in the compression space a in the axial direction. All you have to do is

When the compression space a has an abnormally high pressure, the compliance function is exerted as described above. At this time, the diameter dimension of the concave portion 29 provided in the support frame 2 and the insertion portion are inserted therein. Guide pin 2
Setting the difference ΔR ₁ between the outer diameters of 4 and the guide pin hollow portion 2
By setting the difference ΔR ₂ between the diameter dimension of 4a and the outer diameter dimension of the stopper pin rod portion 27, tilting of the fixed scroll 12 in the radial direction is restricted within an angular range that does not hinder the orbiting movement of the orbiting scroll 11.

Therefore, the orbiting scroll 11 can continue a smooth orbiting motion without the radial scrolling and displacement of the fixed scroll 12 occurring. The stopper pin 23 enables the fixed scroll 12 to move in the thrust direction within the range of the gap dimension ΔL ₂ with the fixed scroll end plate portion 12a without interfering with the guide pin 24. Fixed scroll 12 with respect to orbiting scroll 11
Need not be moved more than necessary, and the compression efficiency of the compression space a is not adversely affected.

FIG. 4 (A) is a top view of the support frame, and FIG. 4 (B) is a bottom view of the fixed scroll supported thereby. The hatched portion H in each drawing is a flange portion that has been conventionally required, and is a screw hole portion (support frame) provided in this flange portion and a pin insertion hole (fixed scroll).

That is, by adopting the fixed scroll and the supporting frame of the invention described above, the weight of the flange portion H shown by hatching is reduced, and the number of man-hours can be reduced because hole machining or screw hole machining is unnecessary. It is a thing.

The scroll compressor is not necessarily limited to the one provided in the equipment constituting the refrigeration cycle, but can be used for compressing other kinds of compressed gas or air.

[0068]

As described above, according to the first aspect of the invention, the protruding portion of the guide pin fitted and fixed to the fixed scroll end plate is slidably inserted into the concave portion provided in the support frame. , The stopper pin is slidably inserted into the hollow part of this guide pin, the tip part is fixedly attached to the concave surface of the support frame, and the stopper pin prevents the fixed scroll from moving more than necessary in the axial direction. As a result, it is possible to reduce the number of processing steps for the fixed scroll and the support frame and to reduce the size and weight. Then, by slidingly fitting the guide pin into the recess of the frame,
The stopper pin does not need to be applied with a horizontal force, and the reliability of the compliance function can be improved.

According to the second aspect of the present invention, the recessed surface of the support frame is provided with the screw hole portion, and the tip screw portion of the stopper pin is screwed into the screw hole portion. The screw diameter is the loose insertion portion into the hollow portion of the guide pin. Since the diameter is smaller than the diameter, the amount of axial movement of the fixed scroll can be easily set by the stopper pin size.

According to the third aspect of the present invention, the stopper pin has a larger diameter than the guide pin at the base end protruding from the guide pin and a predetermined gap from the upper end of the guide pin. Since the fixed scroll is provided with the stopper portion that restricts the axial back movement amount, the axial movement amount of the fixed scroll can be easily set.

According to the fourth aspect of the present invention, the stopper pin is inserted into the hollow spacer of the guide pin which is loosely inserted in the hollow portion of the guide pin, and the tip screw portion projects from the lower end portion of the spacer. Since the base end head is composed of a bolt protruding from the spacer upper end portion and a washer interposed between the base end head portion of the bolt and the spacer upper end portion,
The cylindrical spacer allows you to freely set the amount of movement of the fixed scroll, and the standard bolts can be used as they are.

According to the fifth aspect of the present invention, as the compliance function supporting means, guide means for guiding the fixed scroll in the axial direction when the compression space is in an abnormally increased pressure state, and the fixed scroll at a necessary amount or more at this time are provided. Since the restriction means for restricting the movement of the fixed scroll is collectively provided at one place, it is possible to reduce the processing man-hours for the fixed scroll and the support frame and to reduce the size and weight.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a scroll compressor showing an embodiment of the present invention.

FIG. 2 is an exploded view of the compliance function support means of the embodiment.

FIG. 3 is a vertical cross-sectional view of the compliance function supporting means of the embodiment.

FIG. 4A is a plan view of a support frame according to the same embodiment. (B) is a bottom view of the fixed scroll of the embodiment.

FIG. 5 is a vertical cross-sectional view of a scroll compressor showing a conventional form.

[Explanation of symbols]

11 ... Orbiting scroll, 12 ... Fixed scroll, a ... Compression space, 13 ... Back pressure guide means, 14 ... Compliance function support means, 2 ... Support frame, 29 ... Recessed part, 24
… Guide pins, 23… Stopper pins.

Claims (5)

[Claims] Claims: 1. A spiral scroll orbit of a fixed scroll is meshed with a spiral scroll orbit of a orbiting scroll, and a compression space is formed by these blades and the end plate of each scroll blade to orbit the scroll. In a scroll compressor that moves, sucks compressed gas into the compression space, compresses it, and discharges it, gas pressure is applied to the back side of the fixed scroll to restrict axial movement of the fixed scroll in normal operating conditions. The back pressure guide means and the fixed scroll are movably supported in the axial direction, and the fixed scroll is moved in the axial direction when the compression space is in an abnormally increased pressure state exceeding the gas pressure by the back pressure guide means. Is provided to widen the clearance with the orbiting scroll and release the gas in the compression space. The support frame that supports the outer peripheral portion of the fixed scroll end plate portion, the recess provided in the support portion of the fixed scroll end plate portion of the support frame, and the fixed scroll end plate portion is fitted and fixed to the fixed scroll end plate A hollow guide pin that projects and is slidably inserted into the concave portion, and is slidably inserted into the hollow portion of the guide pin and is fixedly mounted on the concave surface of the support frame and in the axial direction of the fixed scroll. A scroll compressor, comprising: a stopper pin that restricts the movement of the compressor to an amount more than necessary. 2. The support frame is provided with a screw hole portion on the concave surface, and the stopper pin is provided with a screw portion at a tip thereof which is screwed into the screw hole portion of the concave surface of the support frame. The scroll compressor according to claim 1, wherein the screw diameter is smaller than the diameter of the loose insertion portion into the hollow portion of the guide pin. 3. The stopper pin has a diameter larger than a diameter of the guide pin at a base end portion protruding from the guide pin,
Moreover, it is provided with a predetermined gap from the upper end of the guide pin,
The scroll compressor according to claim 1, further comprising a stopper portion that regulates a back amount of the fixed scroll in the axial direction. 4. The stopper pin has a hollow spacer whose outer diameter is set so as to be loosely inserted into the hollow portion of the guide pin, and the stopper pin which is inserted into the hollow portion of the spacer and has a tip screw portion. 2. A bolt projecting from a lower end portion and having a base end head portion protruding from a spacer upper end portion, and a washer interposed between the base end head portion of the bolt and the spacer upper end portion. Scroll compressor. 5. The spiral scroll orbits the orbiting scroll by orbiting the fixed scroll scroll blade and the orbiting scroll spiral blade to form a compression space with the scroll blade and the end plate portion of each scroll blade. In a scroll compressor that moves, sucks compressed gas into the compression space, compresses it, and discharges it, gas pressure is applied to the back side of the fixed scroll to restrict axial movement of the fixed scroll in normal operating conditions. The back pressure guide means and the fixed scroll are movably supported in the axial direction, and the fixed scroll is moved in the axial direction when the compression space is in an abnormally increased pressure state exceeding the gas pressure by the back pressure guide means. Is provided to widen the clearance with the orbiting scroll and release the gas in the compression space. A guide means for guiding the fixed scroll in the axial direction when the contracted space is in an abnormally increased pressure state, and a regulating means for regulating the movement of the fixed scroll at this time more than a necessary amount are provided.
A scroll-type compressor that is equipped in one place.