KR20070070392A - A swash plate type compressor - Google Patents

Abstract

A swash plate type compressor is provided to form a refrigerant suction path at a part of one of front and rear cylinders facing and contacting each other, thereby freely changing the size of a refrigerant path and simplifying machining thereof. A swash plate type compressor comprises front and rear housings having refrigerant suction/discharge elements, and front and rear cylinders(400,500) mounted between the housings in parallel. The refrigerant suction element has a muffler(550) protruded from a partial section of an outer surface of one of the front and rear cylinders to have a space part(551) of a predetermined size, a refrigerant suction hole(552) formed outside the muffler and connected to the space part in the muffler, and a refrigerant suction path(553) formed at a bottom surface of the space part of the muffler to be opened at a side for connecting the space part to internal space(S) of the one cylinder.

Description

Swash plate type compressor {A swash plate type compressor}

1 is a side view of a swash plate compressor according to the prior art.

2 is an internal cross-sectional view of the compressor shown by cutting the compressor horizontally on the basis of the refrigerant discharge port in FIG.

3 is an internal cross-sectional view of the compressor shown by cutting the compressor horizontally on the basis of the refrigerant inlet in FIG.

4 is an exploded perspective view of the front cylinder and the rear cylinder according to the first embodiment of the present invention.

5 is an overall side cross-sectional view of the swash plate compressor cut to show the refrigerant discharging means in the state shown in FIG.

6 is an overall side cross-sectional view of the swash plate compressor cut to show the refrigerant suction means in the state shown in FIG.

7 is an external perspective view of a rear cylinder according to a second embodiment of the present invention;

<Description of the symbols for the main parts of the drawings>

140: double head piston

200,300: front and rear housing

400,500: front and back cylinder

550 muffler member

551: space

552: refrigerant inlet

553: refrigerant suction passage

The present invention relates to a swash plate compressor, and more particularly, by forming a refrigerant suction passage in at least one portion of the front and rear cylinders which are in contact with each other, the size of the refrigerant passage can be changed very easily, and the processing is very easy. It relates to a swash plate compressor which can be carried out.

Compressor constituting the air conditioner for a vehicle is a device that selectively receives the power of the engine delivered through the pulley by the intermittent action of the electronic clutch to suck the refrigerant from the evaporator to the inside to compress and discharge it to the condenser.

There are various kinds of such compressors according to the compression structure, and among them, a swash plate type compressor is a type that is widely used for automobiles.

The prior art of such a swash plate compressor will be described with reference to the drawings.

As shown in Figs. 1 to 3, the swash plate type compressor is composed of front and rear housings 20 and 30, and front and rear cylinders 40 and 50 which are sequentially arranged between the front and rear housings 20 and 30.

As shown, the front housing 20 is open rearward, the inner wall surface of the front housing 20 (that is, the inner surface of the front wall surface) the refrigerant flowing into the compressor in the front cylinder 40 (Fig. 2) The front refrigerant suction chamber 21 for supplying to the bore (not shown) of the (not shown) and the front refrigerant discharge chamber 22 for discharging the refrigerant compressed and discharged from the bore to the outside of the compressor is formed.

The front refrigerant suction chamber 21 is formed outside the front refrigerant discharge chamber 22 and partitioned from the front refrigerant discharge chamber 22 by a partition wall 23 having a substantially closed curve shape.

The compressor drive shaft (not shown) can be rotatably mounted while the pulley (not shown) is rotatably mounted via a bearing not shown from the center of the front refrigerant discharge chamber 22 toward the front wall surface pressure of the front housing 20. The nose part (not shown) for penetrating while supporting is formed protrudingly.

On the other hand, the rear housing 30 is coupled to the rear cylinder 50 is opened in the front. The inner wall surface of the rear housing 30 (that is, the inner surface of the rear wall surface) is provided from the rear refrigerant suction chamber 31 and the bore for supplying the refrigerant flowing into the compressor to the bore (not shown) of the rear cylinder 50. A rear refrigerant discharge chamber 32 for discharging the compressed and discharged refrigerant to the outside of the compressor is formed.

The rear refrigerant suction chamber 31 is formed to be partitioned by a partition 33 having a substantially closed curve shape on the outside of the rear refrigerant discharge chamber 32.

Discharge connection passages 41 and 51 are formed in the front cylinder 40 and the rear cylinder 50 so as to discharge the refrigerant discharged from the front and rear housings 20 and 30 to the refrigerant discharge port 53. See Figure 2)

Meanwhile, a rear discharge pipe 34 is formed in the rear housing 30 by penetrating the partition 33 from the rear refrigerant discharge chamber 32, and the refrigerant of the front housing 20 is located at the outlet side of the rear discharge pipe 34. In addition to introducing a refrigerant passing through the front and rear cylinders 40 and 50 from the discharge chamber 22, an auxiliary muffler 35 communicating with the outside of the compressor is formed.

In order to effectively reduce the pulsating pressure when the refrigerant is discharged from the front housing 20 to the outside of the compressor, the front housing 20 has a front discharge pipe passing through the partition 23 from the front refrigerant discharge chamber 22. 24 is formed, and the auxiliary muffler 25 is provided at the outlet side of the front discharge pipe 24 to communicate with the discharge connection passage 41 of the front cylinder 40.

Therefore, the refrigerant in the rear refrigerant discharge chamber 32 is transferred to the discharge connection flow path 51 of the rear cylinder 50 through the rear discharge pipe 34 and the auxiliary muffler 35, and of the front refrigerant discharge chamber 22. The refrigerant is transferred to the discharge connection passage 41 of the front cylinder 40 through the front discharge pipe 24 and the auxiliary muffler 25 and together with the refrigerant transferred along the discharge connection passage 51 of the rear cylinder 50. It may be discharged to the outside through the refrigerant discharge port 53.

Reference numeral 10 denotes a drive shaft, 12 denotes a swash plate installed on the drive shaft, and 14 denotes a double head piston coupled to both ends of the swash plate.

Looking at the path that is discharged after the refrigerant is sucked and compressed in the conventional compressor configured as described above are as follows.

First, when the drive shaft 10 rotates by transmission of power from a power source, the swash plate 12 rotates together with the drive shaft 10, and the two head piston pistons 14 move forward and backward cylinders according to the phase of the swash plate 12. (40, 50) is moved back and forth in the corresponding bore of each other.

As the double head piston 14 moves forward and backward, as shown in FIG. 3, since the vacuum pressure is formed, the refrigerant suction passage 52a formed in the refrigerant suction port 52 connected to the evaporator is not shown. Through the crank chamber (C) is introduced.

As described above, the refrigerant introduced into the crank chamber C is sucked into the bores of the front and rear cylinders 40 and 50, respectively.

The refrigerant sucked into the bore is compressed during the compression stroke of the double head piston 14 and discharges the discharge hole of the suction lead valve (not shown) and the discharge hole of the valve plate (not shown) opened by the discharge lead valve (not shown). Through it is discharged toward the refrigerant discharge chamber (22, 32) of the front and rear housing (20, 30).

As described above, when the refrigerant discharged toward the refrigerant discharge chambers 22 and 23 of the front and rear housings 20 and 30 is discharged to the outside of the compressor, the refrigerants respectively discharged from the front and rear housings 20 and 30 are The refrigerant discharge port 53 of the rear cylinder 50 passes through the discharge connection passages 41 and 51 of the front and rear cylinders 40 and 50 after passing through the front and rear discharge pipes 24 and 25 and the auxiliary mufflers 25 and 35. Is discharged to the outside of the compressor (see Fig. 2).

However, the compressor according to the prior art as described above has the following problems.

The prior art has a configuration in which the refrigerant suction passage 52a penetrates the refrigerant suction port 52 so as to introduce the refrigerant into the crank chamber S.

However, forming the refrigerant suction passage 52a through the refrigerant suction opening 52 as described above has a problem in that the diameter of the refrigerant suction passage 52a cannot be made larger than the diameter of the refrigerant suction opening 52.

In addition, the prior art also has a method for forming the refrigerant suction passage (52a) inside the rear cylinder 50 in order to solve the above problems, in this case, the refrigerant suction passage (52a) can only be obliquely drilled processing There was also a difficult problem in the method.

The present invention has been made to solve the above problems, by forming a refrigerant suction passage in at least one portion of the front and rear cylinders in contact with each other, the size of the refrigerant passage can be changed very easily, and the processing is very easy It is an object of the present invention to provide a swash plate compressor that can be carried out easily.

The present invention for achieving the above object is a front and rear housing; A front and rear cylinder disposed side by side between the front and rear housings and having a plurality of bores in which a plurality of pistons are installed to linearly reciprocate; In the swash plate-type compressor including a refrigerant suction means and a refrigerant discharge means formed in the front and rear cylinders, the refrigerant suction means, the muffler protruding to have a predetermined size space in a portion of the outer surface of any one of the front and rear cylinders. Absence; A coolant suction port formed outside the muffler member and communicating with the space part; It is characterized in that it comprises a refrigerant suction passage formed on one side of the bottom of the space portion of the muffler member to communicate the internal space of the space portion and the front and rear cylinders.

Hereinafter, a preferred embodiment of the swash plate compressor according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is an exploded perspective view of the front cylinder and the rear cylinder according to the first embodiment of the present invention, Figure 5 is an overall side cross-sectional view of the swash plate compressor cut to show the refrigerant discharging means in the embodiment shown in FIG. 6 is an overall side cross-sectional view of the swash plate compressor cut to show the refrigerant suction means in the state in which the embodiment shown in FIG. 4 is applied, and FIG. 7 is an external perspective view of the rear cylinder according to the second embodiment of the present invention. .

The first embodiment of the swash plate compressor according to the present invention, as shown in Figs. 4 to 6, the front and rear housings (200, 300), and the front and rear cylinders (400, 500), which are sequentially disposed between the front and rear housings (200, 300), A plurality of both piston piston 140 is installed in the bores of the front cylinder 400 and the bore of the rear cylinder 500 and the refrigerant suction means formed in the front and rear cylinders 400 and 500. And a refrigerant discharge means.

The refrigerant suction means and the refrigerant discharge means according to the present invention is provided in any one of the front and rear cylinders 400 and 500, in the present invention will be described with reference to the drawings provided in the rear cylinder 500 as an example.

Here, the structures of the front and rear cylinders 200 and 300 and the front cylinder 400 are found to be the same as in the prior art.

Therefore, the structure in which the refrigerant suction means and the refrigerant discharge means are formed in the rear cylinder 500 will be described first.

First, the refrigerant suction means includes a muffler member 550, a refrigerant suction opening 552, and a refrigerant suction passage 553.

The muffler member 550 is formed to protrude to have a space portion 551 of a predetermined size in a portion of the outer surface of any one of the rear cylinder 500.

Here, the space 551 is a structure that is open toward the front cylinder 400.

On the other hand, the outer surface of the front cylinder 400, the joining member 450 having a joining surface 451 is joined to the muffler member 550 to close the open portion of the space portion 551 is formed, so As a result, a muffler space capable of storing the suction refrigerant in the space 551 can be secured.

In addition, although not shown in the drawing, the joint surface 451 of the front cylinder 400 may be formed by concaving a space to form a single space with the space portion 551 to allow more refrigerant to be filled, of course. to be.

The refrigerant suction opening 552 is formed outside the muffler member 550 and communicates with the space 551.

The refrigerant suction passage 553 is formed in the rear cylinder 500, and is formed so that one side is opened on the bottom surface of the space portion 551, so that the space portion 551 and the front and rear cylinders 400, 500 The swash plate chamber, which is an internal space S, is formed to communicate with each other.

Here, the refrigerant suction passage 553 is formed at the contact portion of the rear cylinder 500 in contact with the front cylinder 400.

The refrigerant suction passage 553 is alternately arranged with the refrigerant suction opening 552 so that the sucked refrigerant is sufficiently stored or filled in the space 551.

In addition, the coolant suction passage 553 may be formed larger than the hole of the coolant suction port 552 so that the coolant may quickly flow into the swash plate chamber, which is the internal space S of the front and rear cylinders 400 and 500. To be.

On the other hand, the refrigerant discharging means is composed of a refrigerant discharge port 530 protruding to the other portion of the outer surface of the rear cylinder 500 except for the muffler member 550.

On the other hand, the front housing 200 is the rear is open, the inner wall surface of the front housing 200 (that is, the inner surface of the front wall) of the refrigerant flowing into the compressor in the front cylinder 400 (Figs. 5 and 6) The front refrigerant suction chamber 210 for supplying to the bore (not shown) of the (not shown) and the front refrigerant discharge chamber 220 for discharging the refrigerant compressed and discharged from the bore to the outside of the compressor is formed.

The front refrigerant suction chamber 210 is formed to be partitioned from the front refrigerant discharge chamber 220 by a partition wall 230 having a substantially closed curve shape on the outside of the front refrigerant discharge chamber 220.

A compressor pulley (not shown) is rotatably mounted and a compressor drive shaft (not shown) is rotatably mounted through a bearing not shown from the center of the front refrigerant discharge chamber 220 to the front wall pressure side of the front housing 200. The nose part (not shown) for penetrating while supporting is formed protrudingly.

On the other hand, the rear housing 300 is coupled to the rear cylinder 500 is opened in the front. An inner wall surface of the rear housing 300 (ie, an inner surface of the rear wall surface) is provided from the rear refrigerant suction chamber 310 and the bore for supplying the refrigerant flowing into the compressor to the bore (not shown) of the rear cylinder 500. The rear refrigerant discharge chamber 320 for discharging the compressed and discharged refrigerant to the outside of the compressor is formed.

The rear refrigerant suction chamber 310 is formed to be partitioned by a partition wall 330 having a substantially closed curve shape on the outside of the rear refrigerant discharge chamber 320.

Discharge connection passages 410 and 510 are formed in the front cylinder 400 and the rear cylinder 500 so as to discharge the refrigerant discharged from the front and rear housings 200 and 300 to the refrigerant discharge port 530, respectively. Reference)

Meanwhile, a rear discharge pipe 340 is formed in the rear housing 300 by penetrating the partition wall 330 from the rear refrigerant discharge chamber 320, and the refrigerant of the front housing 200 is formed at the outlet side of the rear discharge pipe 340. In addition to introducing a refrigerant passing through the front and rear cylinders 400 and 500 from the discharge chamber 220, an auxiliary muffler 350 communicating with the outside of the compressor is formed.

In order to effectively reduce the pulsating pressure when the refrigerant is discharged from the front housing 200 to the outside of the compressor, the front housing 200 has a front discharge pipe passing through the partition wall 230 from the front refrigerant discharge chamber 220. A 240 is formed, and an auxiliary muffler 250 communicating with the discharge connection passage 410 of the front cylinder 400 is provided at the outlet side of the front discharge pipe 240.

Therefore, the refrigerant in the rear refrigerant discharge chamber 320 is transferred to the discharge connection flow path 510 of the rear cylinder 50 through the rear discharge pipe 340 and the auxiliary muffler 350, and of the front refrigerant discharge chamber 220. The refrigerant is transferred to the discharge connection flow path 410 of the front cylinder 400 through the front discharge pipe 240 and the auxiliary muffler 250 and together with the refrigerant transferred along the discharge connection flow path 510 of the rear cylinder 500. It may be discharged to the outside through the refrigerant discharge port 530.

Reference numeral 100 is a drive shaft, 120 is a swash plate is installed on the drive shaft, 140 is a double headed piston coupled to both ends of the swash plate.

As described above, according to the first embodiment of the present invention, since the refrigerant inlet 552 and the direct refrigerant suction passage 553 do not communicate directly, the refrigerant suction passage 553 of the refrigerant suction passage 552 is larger than the diameter of the refrigerant suction passage 552. It is possible to form a larger diameter.

That is, regardless of the diameter of the refrigerant suction port 552, the size of the refrigerant suction passage 553 may be changed to various sizes as needed, and unlike the conventional method, an unnecessary process of separately processing the refrigerant suction passage may be deleted.

Looking at the path in which the refrigerant is sucked, compressed and discharged in the swash plate compressor according to the first embodiment of the present invention configured as described above are as follows.

First, when the drive shaft 100 is rotated by the transmission of power from the power source, the swash plate 120 rotates together with the drive shaft 100, and according to the phase of the swash plate 120, the double-headed piston 140 is a front and rear cylinder ( 400 and 500 are moved back and forth in the corresponding bores.

As the double-headed piston 140 moves forward and backward, a vacuum pressure is formed in the bore, so that the refrigerant flows into the space portion 551 of the muffler member 550 through the refrigerant suction opening 552 connected to the evaporator (not shown). Then, it flows into the crank chamber (C) through the refrigerant suction passage (553).

As described above, the refrigerant introduced into the crank chamber C is sucked into the bores of the front and rear cylinders 400 and 500, respectively.

The refrigerant sucked in the bore is compressed during the compression stroke of the double head piston 140 and discharges the discharge hole of the suction lead valve (not shown) and the discharge hole of the valve plate (not shown) opened by the discharge lead valve (not shown). Through it is discharged toward the refrigerant discharge chamber (220, 320) of the front and rear housing (200, 300).

As described above, when the refrigerant discharged toward the refrigerant discharge chambers 220 and 230 of the front and rear housings 200 and 300 is discharged to the outside of the compressor, the refrigerants discharged from the front and rear housings 200 and 300, respectively, The refrigerant discharge port 553 of the rear cylinder 500 through the discharge connection flow paths 410 and 510 of the front and rear cylinders 400 and 500 after passing through the front and rear discharge pipes 240 and 250 and the auxiliary mufflers 250 and 350. Is discharged to the outside of the compressor (see Fig. 5).

The swash plate compressor according to the first embodiment of the present invention has been described so far.

Hereinafter, the swash plate compressor according to the second embodiment of the present invention will be described with reference to FIG. 7.

Unlike the swash plate type compressor of the first embodiment, the swash plate type compressor according to the second embodiment of the present invention forms the refrigerant discharging unit in the muffler member and the refrigerant discharging unit is formed outside the cylinder except the muffler member. The great difference is that the refrigerant discharge means and the refrigerant suction means are formed together in the member.

In addition, the coolant suction means and the coolant discharge means are provided in any one of the front and rear cylinders 400 and 500, and the present invention will be described with reference to the drawings provided in the rear cylinder 500 as an example.

Therefore, the second embodiment of the present invention will be described only with respect to the changed parts since most of the configuration is the same as the first embodiment.

The refrigerant suction means includes a muffler member 600 protruding to have a space portion 610 of a predetermined size in a portion of an outer surface of any one of the front and rear cylinders 400 and 500; A partition wall 620 formed in the muffler member 600 to divide and separate the space part 610 into left and right space parts 611 and 612; A refrigerant suction port 630 is formed to protrude outside the muffler member 600 corresponding to any one of the left and right spaces 611 and 612 and communicate with the selected one of the spaces 612. )Wow; The front and rear cylinders 400 and 500 are formed in the cylinders 400 and 500 in which the space portion 612 is formed, and the portions corresponding to the area of the space portion 612 in which the refrigerant suction opening 630 is formed. It consists of a refrigerant suction passage 640 is formed so that the interior of the cylinder and the space 612 is in communication.

Here, the space 610 is a structure that is open toward the front cylinder 400.

On the other hand, the refrigerant discharge means, the refrigerant discharge port 650 formed to communicate with the other space portion 611 on the outside of the muffler member 600 corresponding to the other space portion 611.

That is, one of the spaces 611 and 612 separated by the partition wall 620 is used for refrigerant suction, and the other space 611 is used for refrigerant discharge. Will be.

Here, the refrigerant suction passage 640 is formed in the rear cylinder 500, the processing is formed so that one side is opened on the bottom surface of the space 612, the space 611 and the front and rear cylinders 400, 500 The swash plate chamber, which is an internal space (S) of), is formed to communicate with each other.

In addition, the refrigerant suction passage 640 is formed at a contact portion of the rear cylinder 500 in contact with the front cylinder 400.

In addition, the refrigerant suction passage 640 is alternately arranged with the refrigerant suction opening 630 so that the sucked refrigerant can be sufficiently stored or filled in the space 612 and the suction pulsation pressure can be reduced. do.

In addition, the refrigerant suction passage 640 may be formed larger than the hole of the refrigerant suction opening 630 so that the refrigerant may quickly flow into the swash plate chamber, which is the internal space S of the front and rear cylinders 400 and 500. To be.

As described above, according to the second embodiment of the present invention, since the refrigerant inlet 630 and the direct refrigerant suction passage 640 do not directly communicate with each other, the diameter of the refrigerant suction passage 640 is greater than that of the refrigerant suction passage 630. It is possible to form a larger diameter.

That is, regardless of the diameter of the refrigerant suction opening 630, the size of the refrigerant suction passage 640 may be changed to various sizes as necessary, and, unlike the related art, the unnecessary process of separately processing the refrigerant suction passage may be deleted.

On the other hand, the refrigerant suction passage (553, 640) of the present invention can be formed by hole processing (hole), but as shown in the figure is formed by a "⊃" shaped slot with one side open, it is very easy to process, It is easy to change the passage size.

As described above, the swash plate compressor according to the present invention forms a refrigerant suction passage in at least one portion of the front and rear cylinders which are in contact with each other, so that the size of the refrigerant passage can be changed very easily, and the processing is carried out very easily. You can do it.

Claims (5)

Front and rear housings; A front and rear cylinder disposed side by side between the front and rear housings and having a plurality of bores in which a plurality of pistons are installed to linearly reciprocate; In the swash plate type compressor comprising a refrigerant suction means and a refrigerant discharge means formed in the front and rear cylinders, The refrigerant suction means, A muffler member protruding from a portion of the outer surface of one of the front and rear cylinders so as to have a space portion having a predetermined size; A coolant suction port formed outside the muffler member and communicating with the space part; The swash plate type compressor comprising a refrigerant suction passage formed on one side of the bottom of the space portion of the muffler member to communicate the inner space of the front and rear cylinders. The method of claim 1, The refrigerant discharge means, A partition wall is formed inside the muffler member to separate and separate the space part into the suction / discharge space part so that the discharge refrigerant transferred from the front and rear housings is joined to the discharge space part and the discharge refrigerant is supplied to the outside. A swash plate compressor comprising a discharge port. The method of claim 1, One of the front and rear cylinders is formed with a muffler member having a space portion, The swash plate compressor of the other cylinder is formed with a joining member having a joining surface to be joined to the front surface of the muffler member to close the space. The method of claim 1, The swash plate compressor, wherein the refrigerant suction passage is alternately disposed with the refrigerant suction opening, so that the sucked refrigerant is sufficiently stored in the space. The method of claim 1, The swash plate compressor, characterized in that the refrigerant suction passage is formed larger than the refrigerant suction opening.

Images