JPH07324677A - Compressor - Google Patents

Abstract

PURPOSE:To enhance efficiency of maintenance of a device, repair, and part changing work by constituting a cover for blocking an expansion chamber block of a first cover for covering the expansion chamber and an intake chamber and a second cover provided on this cover, and connecting a discharge passage and an intake passage to respective covers. CONSTITUTION:An expansion chamber block 11 is projectingly provided on the upper part of a main body casing 1 of a compressor in an air conditioner for a vehicle, and the inside is sectioned by a partition wall 11a into an expansion chamber 12 and an intake chamber 13. In this case, the expansion chamber 12 and the intake chamber 13 are blocked by a common first cover 28, and a second cover 29 is provided on the first cover 28 on the upper part of the intake chamber 13. An intake pipe 32 is inserted into and connected to introducing holes 33, 34 coaxially formed on respective covers 28, 29, and a discharge pipe 31 is connected to a part of the first cover 28 on the expansion chamber 12 side. Thereby, only a part on which trouble is generated in the discharge passage or the intake passage can be easily and quickly exchnaged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor used in an air conditioning system for vehicles, and more particularly to a compressor having an expansion chamber block.

[0002]

2. Description of the Related Art Conventionally, as a compressor having an expansion chamber block, for example, those shown in FIGS. 9 and 10 are well known. In FIGS. 9 and 10, reference numeral 71 denotes a main body casing. A swash plate 72 is provided in the main body casing 71, and the swash plate 72 has a drive shaft 7
3 is inserted. A piston 75 is connected to the swash plate 72 via a shoe 74. Piston 75 extends into cylinder bores 76a, 76b.

Further, the main body casing 71 is provided with an expansion chamber block 77. The interior of the expansion chamber block 77 is divided by a partition wall 78 into an expansion chamber 79 into which the fluid compressed in the compressor is introduced and an intake chamber 80 into which the fluid to be compressed from the outside is introduced.

The expansion chamber block 77 is closed by a lid 81. The lid 81 has a discharge passage 82 for sending the fluid in the expansion chamber 79 to a circuit (not shown) outside the system, and a suction passage 80 outside the system. Is connected to the suction passage 83 for sucking fluid from the circuit.

In the above device, the drive shaft 73
When the swash plate 72 is rotated with the rotation of the piston 75, the piston 75 connected through the shoe 74 is connected to the cylinder bore 76a,
It reciprocates in 76b. Due to the reciprocating motion, the cylinder bore 7
The fluid in 6a and 76b is alternately compressed.

The compressed fluid is sent to the expansion chamber 79 in the expansion chamber block 77, and further to the outside of the system through the discharge passage 82. On the other hand, the fluid to be compressed is introduced into the suction chamber 80 from the outside through the suction passage 83, and the swash plate chamber 8
4, and is supplied into the cylinder bores 76a and 76b through the passage 85. In this way, a series of operations of suction, compression and discharge of fluid are repeated.

[0007]

In the conventional apparatus as described above, the expansion chamber block 77 is closed by the lid 81 of the one body, and the discharge passage 82 and the suction passage 8 are provided in the lid 81.
Both 3 are connected. Therefore, for example, even if one of the discharge passage 82 and the suction passage 83 becomes defective for some reason due to long-term use, all of the lid 81, the discharge passage 82, and the suction passage 83 must be replaced at the same time. I won't. Therefore, there is a problem that maintenance, maintenance, replacement, etc. require a great deal of time, cost, and labor.

In order to solve the above-mentioned problems, a system has been proposed in which an adapter is attached to the expansion chamber block 77 and the suction passage and the discharge passage are connected to the adapter, but the adapter is relatively manufactured and processed. In many cases, this is difficult, resulting in an increase in the cost of the device.

The present invention focuses on the above problems,
An object of the present invention is to provide a compressor that can efficiently and inexpensively perform maintenance, maintenance, and component replacement while preventing an increase in device manufacturing cost.

[0010]

According to the compressor of the present invention for achieving the above object, an expansion chamber into which a fluid compressed inside the compressor is introduced and a suction chamber into which a fluid to be compressed from the outside is introduced. In a compressor having an expansion chamber block defined by a partition wall, a lid that closes the expansion chamber block, a first lid that covers the expansion chamber and the suction chamber, and a first lid on the first lid. The second lid is provided, and the discharge passage to the outside communicating with the expansion chamber is connected to either the first lid or the second lid, and the suction chamber is connected to the other. It is composed of a suction passage connected to the outside that communicates with.

The second lid can be fixed together with the first lid to the expansion chamber block by co-fastening.

Further, between the second lid and the first lid,
A seal member is arranged around the introduction hole formed in the second lid.

[0013]

In the compressor as described above, the lid that closes the expansion chamber block includes the first lid that covers the expansion chamber and the suction chamber, and the second lid that is provided on the first lid. The discharge passage is connected to one of the first lid and the second lid, and the suction passage is connected to the other. That is, the entire expansion chamber block is almost completely sealed by the first lid,
Since the discharge passage and the suction passage are respectively connected to different members, even if one of the discharge passage and the suction passage has a trouble due to some cause, only the portion where the trouble has occurred, that is, the second Only the lid side of can be removed and replaced easily. Therefore, the work efficiency of maintenance, maintenance, and parts replacement of the device is improved.

Further, if the second lid and the first lid are both fastened and fixed to the expansion chamber block, even if the lid that closes the expansion chamber block is divided, a dedicated fixing means is attached to it. Since it is not necessary to add it, it is possible to prevent an increase in the number of parts.

Further, between the second lid and the first lid,
Since the seal member that surrounds the introduction hole formed in the second lid is provided, the sealability of the portion is ensured satisfactorily, and even in the case of the lid having the divided structure, there is no fear of the sealability. Absent.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the compressor of the present invention will be described below with reference to the drawings. 1 to 8 show a compressor according to an embodiment of the present invention. 1 in the figure
Shows the body casing. Inside the main body casing 1, a swash plate chamber 14 and a plurality of cylinder bores 6a and 6b are provided. A swash plate 3 is provided in the swash plate chamber 14, and the drive shaft 2 is inserted into the swash plate 3. Plural pistons 5 are connected to the swash plate 3 via shoes 4. Each piston 5 extends into the left and right cylinder bores 6a, 6b. Both ends of the main body casing 1 are closed by a front casing 21 and a cylinder head 22.

In the front casing 21, a front casing side suction chamber 7 and a front casing side discharge chamber 8 are provided.
Are formed. The front casing side suction chamber 7 is connected to the swash plate chamber 14 via a passage 15a.

Further, the front casing side suction chamber 7 is provided with a suction hole 17 having a suction valve 16 which can be opened and closed, and by opening and closing the suction valve 16, the cylinder bore 6a can be communicated.

The front casing side discharge chamber 8 is provided with a discharge hole 19 having an open / close valve 18, and the open / close valve 1
The front casing side discharge chamber 8 and the cylinder bore 6a are communicated with each other through the discharge hole 19 when the valve 8 is opened.

A cylinder head side suction chamber 9 and a cylinder head side discharge chamber 10 are provided in the cylinder head 22. The cylinder head side suction chamber 9 communicates with the swash plate chamber 14 via a passage 15b. Further, the cylinder head side suction chamber 9 is provided with a suction hole 24 having a suction valve 23 that can be opened and closed, and by opening and closing the suction valve 23, communication can be established within the cylinder bore 6b.

The cylinder head side discharge chamber 10 is provided with a discharge hole 26 having an open / close valve 25.
When opened, it is communicated with the cylinder bore 6b through the discharge hole 26.

Further, a discharge chamber 8 on the front casing side,
The cylinder head side discharge chamber 10 is communicated with the expansion chamber 12 of the expansion chamber block 11 via the discharge passage 27.

An expansion chamber block 11 is projectingly provided on the upper portion of the main body casing 1. The inside of the expansion chamber block 11 is divided into an expansion chamber 12 and a suction chamber 13 by a partition wall 11a as shown in FIGS.

The expansion chamber 12 and the suction chamber 13 of the expansion chamber block 11 are closed by a first lid 28. A seal member 38 as shown in FIG. 4 is provided between the expansion chamber block 11 and the first lid 28. This first lid 2
A second lid 29 is provided on the top 8. In this embodiment, as shown in FIG. 2, a second lid 29 is provided above the suction chamber 13. First lid 28, second lid 29
Introductory holes 33 and 34 are bored in this. Also, the second
A groove 35 is formed in the first lid 28 so as to surround the introduction hole 34 formed in the lid 29. An O-ring 36 is provided in the groove 35 as a seal member. The first lid 28 and the second lid 29 are fastened together with the expansion chamber block 11 by bolts 30 (FIG. 8).

A suction passage 32 for introducing a fluid to be compressed from the outside into the suction chamber 13 is introduced into the introduction holes 33 and 34.
(Suction pipe) is inserted, and the suction passage 32 is opened into the suction chamber 13. The suction passage 32 communicates with an external fluid circuit (not shown). In addition, the suction chamber 13
A passage 37 is opened through the passage 37, and the suction chamber 13 and the swash plate chamber 14 communicate with each other through the passage 37.

A discharge passage 31 (discharge pipe) for sending a fluid to the outside is connected to the first lid 28. Discharge path 31
Has one end open into the expansion chamber 12. Further, the other end of the discharge passage 31 is connected to an external fluid circuit (not shown). A discharge passage 27 is opened in the expansion chamber 12, and the expansion chamber 12, the front casing side discharge chamber 8 and the cylinder head side discharge chamber 10 are communicated with each other via the discharge passage 27.

In the apparatus of this embodiment, when the drive shaft 2 is rotated, the swash plate 3 is rotated along with the rotation. The piston 5 joined through the shoe 4 by the rotation of the swash plate 3
Reciprocate in the cylinder bores 6a and 6b, and the fluid is compressed. The compressed fluid is discharged to the front casing side discharge chamber 8 and the cylinder head side discharge chamber 10. The discharged compressed fluid is sent to the inside of the expansion chamber 12 via the discharge passage 27, and further to the external fluid circuit via the discharge passage 31.

Further, the fluid to be compressed is sucked from the suction passage 32. The fluid sucked from the suction passage 32 into the suction chamber 13 is sent from the passage 37 to the suction chambers 7 and 9 through the swash plate chamber 14 and the passages 15a and 15b, and is supplied into the cylinder bores 6a and 6b. To be done.

In the present embodiment, the expansion chamber block 11
The lid that closes the chamber is composed of a first lid 28 that covers the expansion chamber 12 and the suction chamber 13, and a second lid 29 provided on the first lid 28. In other words, compared to the conventional structure,
The lid is divided. A discharge passage 31 communicating with the expansion chamber 12 is connected to the first lid 28, and a suction passage 32 for sucking a fluid to be sucked into the suction chamber 13 is connected to the second lid 29. ing.

That is, the discharge passage 31 and the suction passage 32 are not connected to the same lid as in the conventional case (FIG. 10), but
Each is connected to another lid member. Therefore, for example, if a problem occurs in either the discharge path 31 or the suction path 32 for some reason, and it becomes necessary to replace the part, only the defective member can be easily and quickly replaced. . In particular, replacement of the second lid 32 side is extremely easy.

The second lid 29 is fastened together with the first lid 28 to the expansion chamber block 11 with bolts 30. Therefore, even if the structure in which the lid is divided into the first lid 28 and the second lid 29 is adopted, there is no adverse effect such as an increase in the number of fixing members accompanying this. Further, by tightening both lids 28 and 29 together, it becomes possible to further enhance the efficiency of the above-mentioned replacement work and the like.

An O-ring 36 is provided as a seal member between the second lid 29 and the first lid 28 and around the introduction hole 34 formed in the second lid 29. Therefore, even in the case of the divided structure, it becomes possible to easily form the flow passage having excellent sealing property between the lids 28 and 29.
The necessary sealability is sufficiently secured.

In this embodiment, the first lid 28
Although the discharge passage 31 is connected to the second lid 29 and the suction passage 32 is connected to the second lid 29, the invention is not limited to this.
A second lid 29 is provided above the expansion chamber 12, and the first lid 2
8 is connected to the suction passage 32, and the second lid 29 is connected to the discharge passage 3
Even if 1 is connected, the same operation and effect as described above can be obtained.

In this embodiment, the present invention is applied to a swash plate type compressor having a so-called double-headed piston, but the present invention is not limited to this, and the present invention is widely applied to compressors in general. It is possible to apply.

[0035]

As described above, according to the compressor of the present invention, the discharge passage and the suction passage are connected to the first lid or the second lid, which are separate members, respectively. If a problem occurs in either the discharge path or the suction path for some reason, only the member side can be replaced easily and quickly, greatly improving the work efficiency of equipment maintenance, maintenance, and parts replacement. Can be improved.

Further, since the first lid and the second lid are fixed to the expansion chamber block by tightening together, there is no need for another fixing tool even if the lid is divided, and the parts are It is possible to prevent an increase in points.

Further, between the second lid and the first lid,
Since the sealing member that surrounds the introduction hole formed in the second lid is provided, the necessary sealing performance is sufficiently ensured even with the lid having the divided structure.

[Brief description of drawings]

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

2 is a cross-sectional view of the device of FIG. 1 taken along the line II-II.

3 is a cross-sectional view of an expansion chamber block of the device of FIG.

4 is a plan view of a seal member of the apparatus of FIG.

5 is a plan view of a first lid of the device of FIG.

6 is a partial cross-sectional view taken along line VI-VI of FIG.

FIG. 7 is a plan view of a first lid and a second lid.

8 is a sectional view taken along the line VIII-VIII in FIG.

FIG. 9 is a vertical sectional view of a conventional compressor.

10 is a cross-sectional view of the device of FIG. 9 taken along the line XX.

[Explanation of symbols]

 1 Main body casing 2 Drive shaft 3 Swash plate 4 Shoe 5 Piston 6a, 6b Cylinder bore 7 Front casing side suction chamber 8 Front casing side discharge chamber 9 Cylinder head side suction chamber 10 Cylinder head side discharge chamber 11 Expansion chamber block 11a Partition wall 12 Expansion Chamber 13 Suction chamber 14 Swash plate chamber 15a, 15b Passages 16, 23 Suction valve 17, 24 Suction hole 18, 25 Open / close valve 19, 26 Discharge hole 21 Front casing 22 Cylinder head 27 Discharge passage 28 First lid 29 Second lid 30 bolt 31 discharge path 32 suction path 33, 34 introduction hole 36 O-ring as seal member 37 passage 38 seal member

Claims (3)

[Claims] 1. A compression system in which an expansion chamber into which a fluid compressed inside a compressor is introduced and an intake chamber into which a fluid to be compressed from the outside is introduced have an expansion chamber block defined by a partition wall. In the machine, the lid that closes the expansion chamber block includes a first lid that covers the expansion chamber and the suction chamber, and a second lid that is provided on the first lid. One of the lid and the second lid is connected to an external discharge path communicating with the expansion chamber, and the other is connected to an external suction path communicating with the suction chamber. Compressor to do. 2. The compressor according to claim 1, wherein the second lid is fixed to the first lid and the expansion chamber block by co-fastening. 3. Between the second lid and the first lid,
The compressor according to claim 1 or 2, wherein a seal member is disposed around the introduction hole formed in the second lid.