JPH08210274A - Scroll type compressor - Google Patents

Abstract

PURPOSE: To improve lubricity by a method wherein the sufficient area of a flow passage for refrigerant gas running from a suction port to a suction chamber is ensured and suction efficiency is prevented from lowering and oil contained in refrigerant gas is sufficiently spread. CONSTITUTION: A main suction hole 21 communicating a suction port 20 with a suction chamber 7 of the outer peripheries of the spiral parts 4b and 5b of two scroll members 4 and 5 is formed in a front housing 2. An auxiliary suction hole 22 communicated with the suction chamber 7 is formed in the front housing 2 individually from the main suction hole 21 in such a manner to be positioned on the opposite side to the main suction hole 21 with the axis of a shaft 8 therebetween.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll compressor.

[0002]

2. Description of the Related Art In this type of scroll compressor, a suction port for a refrigerant gas is formed outside a front housing, and this suction port passes through a suction hole inside the front housing to form a spiral portion of both scroll members. It is designed to communicate with the suction chamber on the outer periphery of the. During operation of the compressor, the refrigerant gas is taken from the suction port through the suction hole and the suction chamber into the sealed space between the scroll members in accordance with the revolving movement of the movable scroll member, and the sealed space reduces its volume. While moving toward the center of the spiral portion, the refrigerant gas is compressed.

[0003]

However, in the conventional scroll compressor, the suction hole is formed in the front housing so as to open toward the base plate portion of the movable scroll member. Therefore, during operation of the compressor,
As the movable scroll member revolves, the opening portion of the suction hole is blocked by the base plate portion of the movable scroll member or the member of the detent mechanism interposed between the front housing and the movable scroll member, and the area of the opening portion is increased. May decrease.

As described above, if the opening end of the suction hole is closed or the opening area is reduced, there is a problem that a sufficient flow passage area for the refrigerant gas cannot be secured and the suction efficiency is lowered. Further, when the flow of the refrigerant gas becomes poor, it is difficult for the oil contained in the refrigerant gas to reach the movable portion requiring lubrication, and the lubricity is deteriorated.

The present invention has been made by paying attention to the problems existing in such conventional techniques. The purpose is to ensure a sufficient flow passage area for the refrigerant gas from the suction port to the suction chamber, prevent a decrease in suction efficiency, and lubricate the oil contained in the refrigerant gas. It is an object of the present invention to provide a scroll-type compressor which can sufficiently improve the lubricity by sufficiently reaching each part requiring the above, and which can have a simple structure for that.

[0006]

In order to achieve the above object, in the invention of a scroll compressor according to claim 1, the front housing has a suction port at the outer circumference of the spiral portion of both scroll members. A main suction hole communicating with the suction chamber is formed, and an auxiliary suction hole communicating the suction port with the suction chamber is formed separately from the main suction hole.

According to a second aspect of the present invention, in the scroll compressor according to the first aspect, the auxiliary suction hole is formed so as to be located substantially opposite to the main suction hole with the shaft center of the shaft interposed therebetween. It is a thing.

According to the third aspect of the present invention, the front housing is provided with an interposing plate on the inner surface thereof for receiving the end face of the movable scroll member and receiving the axial compression reaction force acting on the movable scroll member. The interposition plate is prevented from rotating to the front housing via the pin, the pin is projected toward the movable scroll member side, and the movable scroll member is provided with a recess for avoiding interference with the pin.

According to the fourth aspect of the present invention, the movable scroll member is provided with recesses which communicate with the main suction hole and the auxiliary suction hole, respectively, and these recesses are communicated with the recesses for avoiding interference with the pin. There is.

Therefore, claim 1 constructed as described above
In the scroll compressor of No. 2, when the movable scroll member revolves around the axis of the fixed scroll member via the bush due to the rotation of the shaft, the refrigerant gas passes from the suction port through the main suction hole and the suction chamber, It is taken into the closed space between the scroll members. Then, as the movable scroll member revolves, the hermetically sealed space is moved toward the center of the spiral portions of both scroll members while reducing the volume thereof, thereby compressing the refrigerant gas.

During the operation of the compressor, the opening end of the main suction hole may be closed by the base plate of the movable scroll member or the annular member of the rotation stopping mechanism as the movable scroll member revolves. However, even when the opening end of the main suction hole is blocked or the area of the opening is reduced, the auxiliary suction hole is communicated with the suction chamber.

In addition, the size of the housing or the like needs to be increased in order to secure a sufficient flow passage area without providing the auxiliary suction hole. However, in the present invention, since the auxiliary suction hole is provided, the compressor The size can be reduced.

In the scroll compressor of the second aspect, even if one of the main suction hole and the auxiliary suction hole is closed, the other is always in the open state, and the flow path of the refrigerant gas can be surely formed. In the scroll compressor of the third aspect, the interposition plate provided between the front housing and the movable scroll member is reliably prevented from rotating by the pin, and the pin does not interfere with the movable scroll member.

In the scroll compressor of the fourth aspect, the refrigerant gas introduced from the main suction hole and the auxiliary suction hole passes through the recesses formed in the movable scroll member and communicating with the main suction hole and the auxiliary suction hole. It passes through a recess for avoiding interference with the pin and is sucked into the suction chamber from there.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS.

As shown in FIG. 1, the shell 1 is made of an aluminum alloy, and front and rear end surfaces of the shell 1 are joined to each other by an annular expanded portion 1a formed on the outer peripheral side of the front housing 2 made of the aluminum alloy. The rear housing 3 is joined to the rear end surface. And
The shell 1, the front housing 2 and the rear housing 3 are fixed by a plurality of bolts (not shown). The shell 1, the front housing 2, and the rear housing 3 form a housing of the compressor. The fixed scroll member 4 is integrally formed in the shell 1, and includes a base plate portion 4a and a spiral portion 4b protrudingly provided on the inner surface thereof.

The movable scroll member 5 is incorporated in the shell 1 with its center offset, and has a substrate portion 5a, a spiral portion 5b protruding from the inner surface thereof, and a cylindrical shape protruding from the outer surface of the substrate portion 5a. It has a boss portion 5c. By engaging the spiral portion 5b of the movable scroll member 5 with the spiral portion 4b of the fixed scroll member 4, a compression chamber 6 as a closed space is formed between the scroll members 4 and 5, and the spiral portion 5b is formed. An annular suction chamber 7 is formed between the outer circumferences of 4b and 5b and the inner circumference of the shell 1. Between the front housing 2 and the movable scroll member 5, the space between the outer circumference of the boss portion 5c and the inner circumference of the annular expanded diameter portion 2a forms a suction passage 7a which is continuous with the suction chamber 7.

The shaft 8 is rotatably supported in the front housing 2 by a bearing 9, and a driving projection 10 is provided on the inner end surface of the shaft 8 so as to be eccentric to the axis of the shaft 8. The bush 11 is supported in contact with the inner end surface of the shaft 8 by fitting the fitting hole 12 into the drive projection 10, and a balance weight 13 is integrally formed on the outer surface thereof. The bearing 14 is fitted to the inner circumference of the boss portion 5c of the movable scroll member 5, and the bearing 14 is engaged with the bush 11. Therefore, when the shaft 8 is rotated, the bush 1 is driven by the drive protrusion 10.
1 and the bearing 14, the movable scroll member 5
Are revolved around the axis of the shaft 8.

As shown in FIGS. 1 to 3, the rotation stopping mechanism 1
5 is the front housing 2 and the movable scroll member 5
It is arranged between and. That is, the four recesses 16 are formed on the inner surface of the front housing 2 on the same circumference at predetermined intervals, and the first pins 17 project from the centers of the recesses. The four second pins 18 are the first pins 17
Corresponding to, the protrusions are provided on the outer surface of the base plate portion 5a of the movable scroll member 5 on the same circumference at predetermined intervals.

Four sleeves 19 made of iron-based metal are movably arranged in each of the recesses 16, and a first pin 17 and a second pin 18 are formed inside the recesses 16 from the inner surface of the recess 16. They are inserted with a gap in between. The center-to-center distance between these pins 17 and 18 is set to be the revolution radius of the movable scroll member 5. As a result, the movable scroll member 5 is prevented from rotating about its own axis, and is allowed to revolve around the axis of the fixed scroll member 4.

As shown in FIGS. 1 and 2, the suction port 20 is formed in the peripheral wall of the front housing 2, and the refrigerant gas is sucked into the front housing 2 through the suction port 20. The main suction hole 21 is formed in the annular expanded portion 2a of the front housing 2 corresponding to the suction port 20, and the main suction hole 21 is open toward the suction chamber 7 and the suction passage 7a.

The auxiliary suction hole 22 is formed in the annular expanded portion 2a of the front housing 2 so as to be located substantially opposite to the main suction hole 21 with the axis of the shaft 8 interposed therebetween, and the suction chamber 7 and the suction passage are formed. It opens toward 7a. The area of the auxiliary suction hole 22 on the suction chamber 7 side is larger on the outer peripheral side than on the inner peripheral side. When the movable scroll member 5 revolves, the suction port 20 communicates with the suction chamber 7 through the main suction hole 21, and also through the suction passage 7a and the auxiliary suction hole 22. Be communicated to.

As shown in FIGS. 1 to 4A, the ring-shaped interposition plate 23 made of a steel plate is used as the front housing 2.
And the movable scroll member 5, the four recesses 24 corresponding to the recesses 16 of the front housing 2 are formed on the inner periphery thereof. The pair of concave grooves 25 and 26 are formed on the outer periphery of the interposition plate 23 and correspond to the main suction hole 21 and the auxiliary suction hole 22 of the front housing 2. As shown in FIG. 4B, the recessed groove 25 may be replaced with a hole 25a punched into an elliptical shape. The detent pin 43 is fixed to the front housing 2 and is inserted into the hole 23a of the interposition plate 23 shown in FIGS. 4A and 4B to prevent the interposition plate 23 from rotating.

The four convex surfaces 27 are formed on the outer surface of the movable scroll member 5 on the same circumference at predetermined intervals, and two oil pockets 28 are formed on each of the surfaces. The movable scroll member 5 has these convex surfaces 2
In FIG. 7, it is supported by the annular enlarged diameter portion 2 a via the interposition plate 23. The interposition plate 23 prevents the movable scroll member 5 made of an aluminum alloy and the front housing 2 from being heat-sealed when the movable scroll member 5 revolves, and at the same time, the compression reaction force acting on the movable scroll member 5 is prevented. Is accepted.

As shown in FIG. 1, the discharge hole 29 is formed at the center of the base plate portion 4a of the fixed scroll member 4 and connects the compression chamber 6 to the discharge chamber 32 in the rear housing 3.
The discharge valve 30 is arranged at the outer end of the discharge hole 29, and the open position of the discharge valve 30 is regulated by a stopper 31. The discharge port 33 is formed on the peripheral wall of the shell 1, and the high pressure gas in the discharge chamber 32 is
It is discharged to an external refrigerant circuit (not shown) through the discharge port 33.

Next, the operation of the scroll type compressor constructed as described above will be described. Now, when the shaft 8 of this compressor is rotated, due to the eccentric rotation of the drive protrusion 10,
The movable scroll member 5 is revolved around the axis of the shaft 8 via the bush 11 and the bearing 14. As a result, the refrigerant gas is directly sucked into the suction chamber 7 through the suction port 20 and the main suction hole 21, and the main suction hole 21
Through the suction passage 7a and the auxiliary suction hole 22 from the suction chamber 7
Is sucked into the scroll chamber and both scroll members 4, 5 are sucked from the suction chamber 7.
It is taken into the compression chamber 6 in between. Then, as the movable scroll member 5 revolves, the compression chamber 6 becomes a spiral portion 4b, 5
It is moved from the outer peripheral part of b to the central part, and the volume is gradually reduced to perform the compression action. Therefore, the refrigerant gas is gradually compressed in the compression chamber 6, and the discharge valve 30 is pushed open from the discharge hole 29 and discharged into the discharge chamber 32.

During the operation of this compressor, as the movable scroll member 5 revolves, the openings of the main suction hole 21 and the auxiliary suction hole 22 on the suction chamber 7 side become movable.
Are sequentially closed by the substrate portion 5a. As a result, FIG.
Further, as shown by hatching in FIGS. 5 to 7, the opening state of the suction holes 21 and 22 on the suction chamber 7 side changes in accordance with the revolution movement of the movable scroll member 5.

That is, as shown in FIG. 2, the axis O1 of the movable scroll member 5 is the axis O of the fixed scroll member 4.
In the state of being biased upward with respect to 2, the opening area of the main suction hole 21 becomes smaller and the opening area of the auxiliary suction hole 22 becomes larger. Further, as shown in FIG. 5, when the axis O1 of the movable scroll member 5 is eccentric to the side of the main suction hole 21, the opening end of the main suction hole 21 is substantially closed and the auxiliary suction hole 21 is closed. The opening area of 22 becomes maximum.

Further, as shown in FIG. 6, the axis O1 of the movable scroll member 5 is the axis O2 of the fixed scroll member 4.
In the state of being biased downward with respect to the above, the opening area of the main suction hole 21 increases and the opening area of the auxiliary suction hole 22 decreases. Moreover, as shown in FIG. 7, when the axis O1 of the movable scroll member 5 is biased to the side of the auxiliary suction hole 22 side, the opening end of the auxiliary suction hole 22 is almost closed and the main suction hole 22 is closed. The opening area of 21 becomes maximum.

As described above, when the movable scroll member 5 revolves, even if one of the main suction holes 21 and the auxiliary suction holes 22 has its opening end blocked by the base plate portion 5a thereof, the other opening is closed. The end portion is in communication with the suction chamber 7. That is, when the opening of the auxiliary suction hole 22 is narrowed, the suction chamber 7 is opened from the opening of the main suction hole 21 on the suction chamber 7 side.
The flow path leading to is secured. Further, in the state where the opening of the main suction hole 21 is narrowed, the suction passage 7a of the main suction hole 21 is
Side opening, suction passage 7a, suction passage 7 of auxiliary suction hole 22
A flow path from the opening on the a side and the opening on the suction chamber 7 side of the auxiliary suction hole 22 to the suction chamber 7 is secured. Therefore, the suction port 20
A sufficient flow passage area for the refrigerant gas from the suction chamber 7 to the suction chamber 7 can be always secured, and it is possible to prevent the possibility of reducing the suction efficiency, and at the same time, the oil contained in the refrigerant gas needs lubrication. To improve the lubricity.

Moreover, since the structure for obtaining the above-mentioned action is formed only by forming the auxiliary suction hole 22, the number of parts does not increase and the structure can be simplified.

[0032]

[Another embodiment]

(Second Embodiment) Next, a second embodiment of the present invention will be described in detail with reference to FIGS.

In the second embodiment, the structure of the rotation stopping mechanism 15 is different from that of the first embodiment described above. That is, in the rotation stopping mechanism 15 of this embodiment,
A support plate 36 made of an annular aluminum alloy is disposed between the front housing 2 and the movable scroll member 5 so as to be relatively movable, and four pins 37 are provided on the support plate 36 on the same circumference. Are pierced and supported at predetermined intervals. The contact surface of the movable scroll member 5 with the support plate 36 is subjected to surface treatment such as nickel / phosphorus plating to prevent heat fusion.

The four first sleeves 38 are embedded in the inner surface of the front housing 2 at predetermined intervals on the same circumference, and one end of the pin 37 is spaced a minute gap from the inner surface of the sleeve 38 inside them. It has been inserted. 4 second
Corresponding to the first sleeve 38, the sleeves 39 are embedded in the outer surface of the base plate portion 5a of the movable scroll member 5 on the same circumference at predetermined intervals, and the other end of the pin 37 is inside the inner surface of the sleeve 39. It is inserted with a small gap from.

The distance between the centers of the first sleeve 38 and the second sleeve 39 is set to be the revolution radius of the movable scroll member 5. As a result, the movable scroll member 5 is prevented from rotating about its own axis, and is allowed to revolve around the axis of the fixed scroll member 4. The support plate 36 also has a function of transmitting the compression reaction force acting on the movable scroll member 5 to the interposition plate 23.

In the second embodiment as well, as in the first embodiment described above, the front housing is arranged so that the main suction hole 21 and the auxiliary suction hole 22 are located on opposite sides of the shaft 8 with the axial center of the shaft 8 therebetween. It is formed on two annular expanded diameter portions 2a. Therefore, also in the second embodiment, as the movable scroll member 5 revolves, one of the main suction hole 21 and the auxiliary suction hole 22 has its opening on the suction chamber 7 side defined by the support plate 36 of the rotation stopping mechanism 15. Even if it is blocked, the other opening is in communication with the suction chamber 7. Therefore, a sufficient flow passage area for the refrigerant gas from the suction port 20 to the suction chamber 7 can always be ensured, and it is possible to prevent the suction efficiency from decreasing and prevent the oil contained in the refrigerant gas from being absorbed. The lubricity can be improved enough to reach each part, and the structure can be simplified. (Third Embodiment) Next, a third embodiment of the present invention will be described in detail with reference to FIGS.

In the third embodiment, the interposition plate 23
Both ends of the rotation stopping pin 43 for preventing rotation are formed in a spherical shape, and one end of the pin 43 projects from the hole of the interposition plate 23 to the movable scroll member 5 side. The pin escape recess 40 is formed on the outer peripheral side of the outer end surface of the base plate portion 5a of the movable scroll member 5 at a position facing the pin 43, and has a size such that the pin 43 and the movable scroll member 5 do not interfere with each other. Further, in the portion of the movable scroll member 5 facing the main suction hole 21 and the auxiliary suction hole 22,
The suction recesses 41 are formed respectively. The pin escape recess 40 and the suction recess 41 are communicated with each other via an annular passage 42.

In the third embodiment, since the pin 43 projects toward the movable scroll member 5, the engagement between the pin 43 and the interposition plate 23 extends over the entire thickness of the interposition plate 23. Can be secured. Therefore, as in this embodiment, the pin 4
Even if the end portion of 3 is spherical or chamfered, it is possible to reliably fix the interposition plate 23 against rotation. By the way, if the pin 43 does not project from the interposition plate 23 and the tip of the pin is chamfered as in the third embodiment, the engagement length between the interposition plate 23 and the pin 43 becomes short, and There is a possibility that the mounting plate 23 will not be reliably prevented from rotating.

Further, in this embodiment, as shown in FIG. 10, the pin relief recess 40 is provided with the suction recess 41 through the annular passage 42.
Since it is communicated with the suction recess 41, the suction recess 41 communicates with the suction chamber 7 through the annular passage 42 and the pin escape recess 40. Therefore, the refrigerant gas from the suction port 20 smoothly flows into the suction chamber 7, and the operation efficiency of the compressor is improved. Further, the lubricating oil in the refrigerant gas is amply supplied to the sliding surface between the interposition plate 23 and the movable scroll member 5. Therefore, it is possible to reliably prevent seizure of the sliding portion.

The present invention can be modified and embodied as follows. (1) As shown by a chain line in FIGS. 2 and 9, in the first and second embodiments, for example, in addition to the auxiliary suction hole 22 located on the opposite side of the main suction hole 21, the main suction hole 21 and the auxiliary suction hole An auxiliary suction hole 22A is also formed between the suction holes 22 and the main suction holes 21 and the auxiliary suction holes 22 are arranged at every 90 degrees. In addition, provide two or more auxiliary suction holes, and make the number of auxiliary suction holes plural. (2) In the first embodiment, the interposition plate 23 is omitted,
Directly contacting the movable scroll member 5 with the inner surface of the front housing 2. In this case, the movable scroll member 5
At least one of the contact surfaces between the front housing 2 and the front housing 2 is subjected to a hardening treatment such as nickel / phosphorus plating so that the contact surfaces of the movable scroll member 5 and the front housing 2 are heat-sealed when the movable scroll member 5 revolves. Prevent. (3) The concave groove 26 corresponding to the auxiliary suction hole 22 of the front housing 2 is replaced with a hole punched into an elliptical shape. (4) In the third embodiment, the number of auxiliary suction holes 22 is plural. (5) In the third embodiment, chamfering is performed on the edges of the recesses 40, 41 and the annular passage 42.

The technical idea understood from the invention other than the claims will be described below. (1) In claim 1 or 2, the annular expanded portion 2a is formed inside the front housing 2, and the main suction hole 21
The auxiliary suction hole 22 is a scroll-type compressor formed in the annular enlarged diameter portion 2a.

According to this structure, the main suction hole 21 and the auxiliary suction hole 22 can be easily formed. (2) In the above paragraph (1), a scroll compressor in which a suction passage 7a located between the main suction chamber 21 and the auxiliary suction chamber 22 is formed between the front housing 2 and the movable scroll member 5. .

With this structure, the refrigerant gas is reliably guided from the main suction hole 21 to the auxiliary suction hole 22. (3) In the above item (1) or (2), an interposition plate 23, which is made of a metal different from that of the movable scroll member 5 and is in contact with the movable scroll 5, is arranged on the inner surface of the front housing 2. A scroll compressor in which recesses 25 and 26 for passage of a refrigerant gas are formed in portions of the interposition plate 23 corresponding to the main suction holes 21 and the auxiliary suction holes 22.

According to this structure, the compression reaction force acting on the movable scroll member 5 is received by the interposition plate 23, and the front plate 2 is accommodated by the interposition plate 23.
It is possible to prevent heat fusion between the movable scroll member 5 and the movable scroll member 5, and the interposition plate 23 does not hinder the flow of the refrigerant gas. (4) In the above item (1) or (2), a ring 3 is provided between the front housing 2 and the movable scroll member 5.
6 is disposed, and an interposition plate 23 is disposed between the ring 36 and the front housing 2. Refrigerant gas is provided in a portion of the interposition plate 23 corresponding to the main suction hole 21 and the auxiliary suction hole 22. A scroll type compressor in which recesses 25 and 26 for passage are formed.

According to this structure, the compression reaction force acting on the movable scroll member 5 is transmitted through the ring 36 to the interposition plate 2
3, and the interposition plate 23 does not hinder the flow of the refrigerant gas. (5) The scroll compressor according to claim 1 or 2, wherein the auxiliary suction holes 22 are formed at a plurality of locations.

With this structure, it is possible to more effectively secure the flow passage area of the refrigerant gas.

[0047]

As described above in detail, according to the invention of claim 1, it is possible to secure a sufficient flow passage area of the refrigerant gas from the suction port to the suction chamber, and prevent the suction efficiency from decreasing. In addition, the oil contained in the refrigerant gas can be sufficiently distributed to each part requiring lubrication, the lubricity can be improved, and the structure can be simplified.

According to the second aspect of the present invention, the flow path of the refrigerant gas can be reliably formed. According to the invention of claim 3, the interposition plate provided between the front housing and the movable scroll member is securely prevented from rotating by the pin,
Moreover, the pin does not interfere with the movable scroll member.

According to the fourth aspect of the present invention, the refrigerant gas flowing in from the main suction hole and the auxiliary suction hole passes through the concave portion communicating with the main suction hole and the auxiliary suction hole formed in the movable scroll member, and then, with the pin. Through the recess for avoiding the interference, and is sucked into the suction chamber from there. Therefore, a new flow path of the refrigerant gas is formed, the flowability of the sucked refrigerant is improved,
The operating efficiency of the compressor is increased. Furthermore, since the lubricating oil in the refrigerant gas is amply supplied to the sliding surface of the interposition plate, seizure of the sliding portion can be reliably prevented.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a scroll compressor according to a first embodiment.

FIG. 2 is a side view of the front housing as viewed from the rear housing side.

FIG. 3 is a partial cross-sectional view showing a rotation stopping mechanism of a movable scroll member.

FIG. 4A is a side view showing an interposition plate, and FIG. 4B is a side view showing another form of the interposition plate.

5 is a side view of the movable scroll rotated 90 degrees from FIG. 2. FIG.

6 is a side view of the movable scroll rotated 90 degrees from FIG. 5. FIG.

FIG. 7 is a side view showing a state in which the movable scroll is rotated 90 degrees from FIG.

FIG. 8 is a vertical sectional view showing a scroll compressor according to a second embodiment.

FIG. 9 is a side view of the front housing as viewed from the rear housing side.

FIG. 10 is a vertical sectional view showing a scroll compressor according to a third embodiment.

FIG. 11 is a side view showing a movable scroll member of a third embodiment.

FIG. 12 is a side view of the front housing of the scroll compressor according to the third embodiment as viewed from the rear housing side.

[Explanation of symbols]

2 ... Front housing, 3 ... Rear housing, 4 ... Fixed scroll member, 4a ... Board part, 4b ... Spiral part, 5 ...
Movable scroll member, 5a ... Substrate part, 5b ... Spiral part, 6
... compression chamber as a closed space, 7 ... suction chamber, 8 ... shaft, 11 ... bush, 15 ... rotation stop mechanism, 20 ... suction port, 21 ... main suction hole, 22 ... auxiliary suction hole, 23 ... interposer plate, 30 ... Discharge valve, 40 ... Pin escape recess, 41 ... Suction recess, 42 ... Annular passage, 43 ... Detent pin.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuji Yamamoto 1-1, Showa-cho, Kariya city, Aichi Nihon Denso Co., Ltd. (72) Inventor Shinichi Watanabe 1-1-chome, Showa town, Kariya city, Aichi Nidec Incorporated (72) Inventor Yasushi Watanabe 2-chome Toyota Town, Kariya City, Aichi Stock Company Toyota Industries Corporation (72) Inventor Tetsuhiko Fukanuma 2-chome Toyota Town, Kariya City, Aichi Stock Company Toyota Automatic Loom Factory (72) Inventor Shinya Yamamoto 2-chome Toyota Town, Kariya City, Aichi Stock Company Toyota Automatic Loom Factory (72) Inventor Masao Iguchi 2-chome Toyota Town, Kariya City, Aichi Stock Company Toyota Auto Inside the loom mill

Claims (4)

[Claims] 1. A front housing having an intake port,
A fixed scroll member having a base plate part and a spiral part formed on the base plate part, and a base plate part and a spiral part formed on the base plate part, and incorporated so as to be engaged with the fixed scroll member while shifting the center thereof. Movable scroll member, a shaft rotatably supported by the front housing, and eccentrically arranged at the end of the shaft, and imparts an orbital motion about the shaft center of the fixed scroll member to the movable scroll member. A bushing, a rotation preventing mechanism that prevents the movable scroll member from rotating about its own axis, and a rear housing that forms a discharge chamber on the side opposite to the spiral portion of the fixed scroll member, Due to the orbital movement of the movable scroll member, the closed space between the fixed scroll member and the movable scroll member reduces the volume and the spiral portion. In a scroll compressor that moves in the central direction and compresses a refrigerant gas in the hermetically closed space, the front housing has a main suction port that communicates a suction port with a suction chamber on the outer circumference of the scroll parts of both scroll members. A scroll-type compressor having a hole formed therein and an auxiliary suction hole communicating with the suction chamber separately from the main suction hole. 2. The scroll compressor according to claim 1, wherein the auxiliary suction hole is formed so as to be located on a side substantially opposite to the main suction hole with the shaft center interposed therebetween. 3. The front housing is provided with an interposition plate for receiving an end face of the movable scroll member and receiving a compression reaction force in the axial direction acting on the movable scroll member, and the interposition plate is pinned. 3. The scroll type compressor according to claim 1, wherein the scroll type compressor is prevented from rotating through the front housing, the pin is projected toward the movable scroll member side, and the movable scroll member is provided with a recess for avoiding interference with the pin. . 4. The scroll type according to claim 3, wherein the movable scroll member is provided with recesses which respectively communicate with the main suction hole and the auxiliary suction hole, and the recesses for avoiding interference between the recesses and the pins are communicated with each other. Compressor.