KR20150103557A - Double headed swash plate type compressor - Google Patents

Abstract

Disclosed is a double-headed swash type compressor capable of improving a lubricating performance on a driving part of the compressor and having a compact appearance of the compressor as a separation performance of oil from a refrigerant is maximized by restricting a position of an oil separation room to separate oil from a compressor having refrigerant discharging rooms formed on both ends of a cylinder block in a single portion, and setting a length of the oil separation room as long as possible in the discharging room. The double-headed swash type compressor comprises: cylinder bores (130, 140) radially arranged on a front and a rear side of a cylinder block (100); a cylinder head (200) coupled to the cylinder bores (130, 140), having internal discharging rooms (220, 240); a transfer passage (150) penetrating the cylinder block (100) to connect the discharging rooms (220, 240) to be communicated; an oil separation room (410) formed in at least one of the discharging rooms (220, 240) to be an independent space while being communicated with the transfer passage (150), and an oil recirculation passage (160); and an oil separation pipe (420) installed inside the oil separation room (410) with a double pipe structure, separating the oil from the refrigerant, and then supplying the oil to the recirculation passage (160).

Description

[0001] The present invention relates to a double headed swash plate type compressor,

The present invention relates to a double-head swash plate type compressor, and more particularly, to a double-swash plate type compressor in which a discharge chamber of a refrigerant is located at both ends of a cylinder block, And the length of the oil separation chamber is set to be as long as possible to maximize the separation performance of the oil and to design the overall contour of the compressor more compactly.

2. Description of the Related Art Generally, compressors for compressing refrigerant in a vehicle cooling system have been developed in various forms. In such compressors, there are a reciprocating type in which a refrigerant is compressed and a reciprocating type in which a refrigerant is compressed, There is a rotary type.

The reciprocating compressor includes a crank type in which a driving force of a drive source is transmitted to a plurality of pistons using a crank, a swash plate type in which the swash plate is transmitted through a swash plate rotary shaft, and a wobble plate type in which a wobble plate is used. A vane rotary type using a rotary shaft and a vane, and a scroll type using a revolving scroll and a fixed scroll.

The swash plate type compressor includes a fixed displacement type in which the installation angle of the swash plate is fixed and a variable displacement type in which the discharge displacement can be changed by changing the inclination angle of the swash plate.

The oil separator for separating only the oil from the discharge side of the refrigerant and re-supplying the oil to the driving part of the compressor is provided in the compressor Which is an essential component of

For example, a swash plate type compressor having an oil separator disclosed in Korean Patent Publication No. 10-2012-0011747 includes a housing, a cylinder block having a plurality of cylinder bores formed therein and coupled to the housing, And an oil separator provided in the oil separation chamber, and an oil separator for separating the refrigerant from the refrigerant in the oil separator, wherein the oil separator is disposed between the oil separator and the oil separator, To the crank chamber provided with the swash plate, the discharge refrigerant containing the oil flows into the oil separation chamber, the oil is separated and remains on the inner circumferential surface of the oil separation chamber by the centrifugal force, Is supplied to the crank chamber through the oil discharge passage. And there.

In this case, the oil separating assembly 200 must have an oil separator 220 for separating the oil component in the refrigerant. The oil separator 220 has a capability of separating the oil according to its length, The length of the oil separator 220 is preferably ensured as long as possible.

However, since the conventional swash plate type compressor has the oil separating assembly 200 together with the cylinder block 10 forming the plurality of radially disposed cylinder bores 12, There are many limitations in setting the length to be long.

For example, when the oil separating assembly 200 is installed on the upper portion of the cylinder block 10, the length of the oil separator 220 must be limited because interference with the cylinder bore 12 must be avoided. Alternatively, 220 is long, the total volume of the swash plate type compressor increases excessively, which causes a problem of causing layout interference with other components.

That is, in the conventional swash plate type compressor, the length of the oil separator 220 must be set to be small in the structure of the oil separation assembly 200 because there is a restriction on the package. As a result, the oil separation performance deteriorates, The lubrication effect can not be expected.

A swash plate type compressor having an oil separator of Korean Patent Laid-Open No. 10-2012-0011747

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a compressor in which a discharge chamber of a refrigerant is located at both ends of a cylinder block, By setting the length of the oil separation chamber as long as possible, it is possible to maximize the separation performance of the oil contained in the refrigerant, thereby improving the lubrication performance of the compressor driving part, and also making the overall appearance of the compressor more compact. And it is an object of the present invention to provide a swash plate type compressor.

According to an aspect of the present invention, there is provided an internal combustion engine comprising a cylinder block defining a swash plate chamber for accommodating a rotary shaft and a swash plate, a cylinder bore radially disposed in front of and behind the cylinder block, A cylinder head forming a discharge chamber, a delivery passage formed through the cylinder block so as to allow the discharge chamber to communicate therewith so as to be able to communicate therewith, a transfer passage formed in at least one of the discharge chambers, And an oil separation pipe which is installed in a double pipe structure inside the oil separation chamber to separate oil components from the refrigerant and provide the oil separation pipe as the recirculation passage.

In the present invention, the oil separation chamber is disposed in a direction transverse to the cross-sectional surface of the cylinder head, and in particular, the oil separation chamber is disposed in a direction transverse to the cross-sectional central portion of the cylinder head.

In the present invention, the oil separation chamber is arranged to be inclined with respect to the horizontal direction with respect to the cross section of the cylinder head. The oil separation chamber is formed with an inlet for communication with the discharge chamber and an outlet for communication with the recirculation passage. The inlet is located at an upper portion inside the oil separation chamber. The outlet is connected to the oil separation chamber And the outlet is provided with an orifice for pressure drop of the oil.

According to the present invention, the oil separating pipe forms an inlet of the refrigerant at a position spaced upward from the outlet in the oil reed chamber, and forms an outlet of the refrigerant at a portion opposed to the inlet. In addition, the oil separating pipe includes a flow guide portion for reinforcing the descending vortex flow of the refrigerant on the outer circumferential surface inside the oil separating chamber, and the flow guiding portion is formed as a spiral protrusion formed on the outer peripheral surface of the oil separating pipe.

The present invention is characterized in that the position of the oil return chamber for oil separation in a double-head swash plate type compressor in which a discharge chamber of a refrigerant is located at both ends of a cylinder block is limited to any one of forward and rearward discharge chambers, The length of the oil separation chamber can be ensured as long as possible. Therefore, the effect of separating the oil component contained in the refrigerant can be maximized and the overall appearance can be designed more compact. In particular, the present invention provides an effect of further enhancing the performance of oil separation by further strengthening the downward swirling flow of the refrigerant through the formation of the flow guide portion in the form of a spiral protrusion on the outer circumferential surface of the oil separation pipe.

Further, the present invention can secure the maximum amount of oil supplied to the driving unit in the compressor through the improved oil separation effect, thereby improving the lubrication performance of the driving unit, thereby ensuring excellent durability for the compressor The effect will be provided.

1 is a perspective view of a double-headed swash plate type compressor according to the present invention, partially showing the internal structure of a cylinder block.
FIG. 2 is a front view showing a longitudinal end portion of a cylinder block from a double-headed swash plate type compressor according to the present invention to a rear cylinder head, and explains a refrigerant discharge path toward the rear discharge chamber and an oil inflow path toward the swash plate Fig.
FIG. 3 is a perspective view showing a rear valve plate and a rear cylinder head disassembled from the double-head swash plate compressor according to the present invention. FIG. 3 is a perspective view showing the discharge path of the refrigerant toward the rear discharge chamber of the rear cylinder head via the rear valve plate, And the oil flows into the oil passage.
FIG. 4 is a front view showing a rear cylinder head in the double-head swash plate type compressor according to the present invention. FIG. 4 is a front view showing the rear cylinder head in the double- And an oil inflow path, respectively.
FIG. 5 is a view showing the construction of an oil return chamber in a double-head swash plate type compressor according to the present invention, in which oil is separated from a refrigerant introduced into the oil separator chamber, And the flow path of the oil toward the oil passage.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Referring to Figs. 1 to 5, a double-head swash plate type compressor includes a cylinder block 100, a cylinder head 200, a valve plate 300, and an oil separator 400.

The cylinder block 100 is an element forming a part of the outer tube and the skeleton of the compressor, and rotatably supports the rotary shaft 110 at the inner center thereof. The rotary shaft 110 is rotated by a driving force provided from an external power source, and a swash plate 120 for compressing the refrigerant is installed. That is, the swash plate 120 is rotatably installed in the swash plate chamber formed in the cylinder block 100 together with the rotating shaft 110.

The cylinder block 100 includes a front cylinder bore 130 and a front cylinder bore 130. The front cylinder bore 130 is disposed radially with respect to the axial center of the rotary shaft 110 in front of the swash plate 120 and movably receives the front piston 132 therein. And a rear cylinder bore 140 disposed radially with respect to the axial center of the rotary shaft 110 at the rear from the swash plate 120 and movably receiving the rear piston 142 therein. The swash plate 120 is rotated together with the rotary shaft 110 to reciprocate the front piston 132 and the rear piston 142 in the axial direction in the front cylinder bore 130 and the rear cylinder bore 140, The compression of the refrigerant is realized.

The cylinder head 200 includes a front cylinder head 210 coupled to finish the front cylinder bore 130 and forming a front discharge chamber 220 corresponding to the trapped space of the refrigerant compressed therein, a rear cylinder bore 140 And a rear cylinder head 230 coupled to the rear discharge chamber 240 to form a rear discharge chamber 240 corresponding to the trapped space of the refrigerant compressed therein.

In this case, the front discharge chamber 220 and the rear discharge chamber 240 are connected to each other via a transmission passage 150 arranged to pass through the cylinder block 100, . In other words, the transfer passage 150 is compressed in the front cylinder bore 130 and then flows into the front discharge chamber 220 and the refrigerant introduced into the rear discharge chamber 240 after being compressed in the rear cylinder bore 140, Which is a kind of traffic route allowing the combined flow of the refrigerant that can join the refrigerant introduced into the one discharge chamber.

The valve plate 300 is installed between the front cylinder bore 130 and the front cylinder head 210 to discharge the refrigerant compressed and supplied from the front cylinder bore 130 to the front discharge chamber 220, A valve plate 310 disposed between the rear cylinder bore 140 and the rear cylinder head 230 to supply the refrigerant compressed and provided in the rear cylinder bore 140 to the rear discharge chamber 240, 322, respectively.

The oil separator 400 is installed in at least one of a front discharge chamber 220 formed in the front cylinder head 210 or a rear discharge chamber 240 formed in the rear cylinder head 230 Separates the oil component from the refrigerant merged through the transmission passage 150 into the internal swash plate chamber of the cylinder block 100 and discharges only the pure refrigerant component to the outside.

Hereinafter, the oil separator 400 will be described as an embodiment applied to the rear discharge chamber 240 located inside the rear cylinder head 230. [ Therefore, it can be understood that the embodiment in which the oil separator 400 is applied to the front discharge chamber 220 located inside the front cylinder head 210 is constituted through the structure and the route opposite to the following structure.

The oil separator 400 is connected to the rear discharge chamber 240 in the rear cylinder head 230 and the oil recirculation passage 160 formed in the swash plate chamber through the cylinder block 100 An oil separation chamber 410 formed separately from the rear discharge chamber 240 in a state where the oil separation chamber 410 can communicate with the oil separation chamber 410 separately from the rear discharge chamber 240 to form an independent space, And an oil separation pipe 420 for discharging only the remaining pure refrigerant to the outside.

That is, the oil distributing chamber 410 is formed to be able to communicate with the rear discharge chamber 240 located inside the rear cylinder head 230, and has an inlet 412 for allowing the refrigerant to flow freely, And an outlet 414 formed to communicate with the oil recirculation passage 160 extending to the swash plate chamber.

In this case, the outlet 414 is provided with an orifice 416 corresponding to a pressure reducing mechanism for reducing the pressure of the oil separated in the oil separation chamber 410 and discharged to the outside. At this time, the orifice 416 is discharged to the outside through the outlet 414 of the oil distribution chamber 410, and then the pressure of the oil supplied to the swash plate chamber through the recirculation passage 160 is lowered to protect various lubricating portions inside the swash plate chamber .

In the oil separator 400, the oil distributing chamber 410 is arranged in a direction transverse to the transverse section of the rear cylinder head 230, more preferably, in the transverse section of the rear cylinder head 230 The space for allowing the oil to be separated from the refrigerant can be maximally secured in the cylinder head 200 of the compressor having the same diameter.

Particularly, the arrangement of the oil distributing chamber 410 is set to be inclined with respect to the horizontal direction with respect to the rear cylinder head 230. Accordingly, when separating the oil from the refrigerant, the oil separating chamber 410 can enlarge the area where contact is made between the oil and the inner wall of the oil separating chamber 410, so that the effect of separating the oil from the refrigerant It can be maximized.

In addition, the inlet 412 is set to be located at an upper position within the oil separation chamber 410, and the outlet 414 is set to be located at a lower position inside the oil separation chamber 410. As a result, the oil separated from the refrigerant in the oil separation chamber 410 moves downward by its own weight, and then passes through the recirculation passage 160 formed in the cylinder block 100 through the outlet 414, So that it can be re-supplied to the inner space of the swash plate chamber.

The oil separating pipe 420 is formed with an inlet 422 for the refrigerant at a position spaced upward from the outlet 414 in the oil separating chamber 410, Thereby forming an outlet 424 for discharging the pure refrigerant from which the oil component has been removed to the outside.

Particularly, the oil separating pipe 420 forms a flow guiding part 430 for further promoting the downward swirling flow of the refrigerant in the oil separating chamber 410, Like protrusions formed on the outer circumferential surface of the separating pipe 420.

2, the cylinder block 100 is connected to the cylinder block 100 from the transmission passage 150 to communicate with the rear discharge chamber 240 at a portion of the cylinder block 100 facing the rear cylinder head 230, An extending groove 152 for positioning extending in the radial direction toward the central portion of the base plate 100 is formed. In other words, the positioning extension groove 152 is formed to extend along the path between the rear cylinder bore 140 of the cylinder block 100 and the rear discharge chamber 240 located inside the rear cylinder head 230, And serves to adjust the radial position from the outlet of the delivery passage (150) toward the rear discharge chamber (240) to permit smooth flow.

3, the rear valve plate 320 forms a first communication hole 324 for communication between the positioning extension groove 152 and the rear discharge chamber 240, Allowing smooth flow of the refrigerant from the discharge chamber (150) to the rear discharge chamber (240). The rear valve plate 320 smoothly induces the flow of oil from the outlet 414 of the oil distribution chamber 410 to the recirculation passage 160 of the cylinder block 100 via the orifice 416, The second communication hole 326 is formed.

The refrigerant discharged to the front discharge chamber 220 located inside the front cylinder head 210 and the refrigerant discharged to the rear discharge chamber 240 located inside the rear cylinder head 230 may be discharged from the discharge chamber 240. [ And the oil separated from the refrigerant in the oil separator 400 is returned to the inside of the cylinder block 100, The flow path of the oil supplied to the swash plate is described in more detail as follows.

1, the refrigerant discharged from the front cylinder bore 130 toward the front discharge chamber 220 is guided to the rear cylinder bore 140 through a flow path A via the transmission passage 150 . ≪ / RTI > 2, the refrigerant discharged through the outlet of the transmission passage 150 toward the rear cylinder head 230 of the cylinder block 100 flows through the positioning extension groove 152, It is possible to move to the position for communication with the rear discharge chamber 240 via the path B.

3, the refrigerant moving through the positioning extension groove 152 passes through the first communication hole 324 of the rear valve plate 320, and then flows into the rear of the rear cylinder head 230 And reaches the discharge chamber 240. In this process, the flow path of the refrigerant is indicated by reference [C].

The refrigerant discharged directly from the rear cylinder bore 140 to the rear discharge chamber 240 via the rear valve plate 320 flows through the flow path A through the delivery passage 150 in the front discharge chamber 220, A flow path B passing through the first communication hole 324 of the rear valve plate 320 through the positioning extension groove 152 in the transmission passage 150 and a flow path B passing through the first communication hole 324 of the rear valve plate 320 from the flow path B And then flows in the rear discharge chamber 240 sequentially through the flow path C leading to the discharge chamber 240.

3 and 4, the refrigerant merged in the rear discharge chamber 240 is moved into the interior of the oil separation chamber 410 through the inlet 412. As shown in FIG. The flow path of the refrigerant in this process is indicated by the reference [D].

4, the refrigerant flowing into the interior of the oil separation chamber 410 through the inlet 412 flows along the outside of the oil separation pipe 420, The oil contained in the refrigerant is separated naturally and the separated refrigerant gas flows into the outlet 424 via the inlet 422 of the oil separating pipe 420, As shown in FIG. The flow path of the refrigerant gas in this process is indicated by the reference [E].

Particularly, the refrigerant introduced into the interior of the oil recovery chamber 410 through the inlet 412 is further promoted in the effect of oil separation through the flow guide portion 430, The downward swirling flow of the refrigerant is further strengthened through the flow guide portion 430 in the form of a spiral protrusion.

In addition, the oil separated from the refrigerant in the above-described series of oil separation processes falls by its own weight and moves to the lower space of the oil distribution chamber 410, and then is discharged to the outside through the outlet 414. The flow path of the oil in this process is indicated by the reference [F].

1 to 3, the oil flowing out of the oil distribution chamber 410 flows through the orifice 416 provided in the outlet 414, Through the second communication hole 326 of the plate 320 and through the recirculation passage 160 of the cylinder block 100. The flow path of the oil in this process is indicated by the reference [G].

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limited to the particular details of the embodiments set forth herein. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

100-cylinder block 110-
120-swash plate 130, 140-cylinder bore
150-transmission passage 160-recirculation passage
200-cylinder head 220, 240-discharge chamber
300-valve plate 400-oil separator
410 - Eluence chamber 412 - Entrance
414-outlet 416-orifice
420-oil separation pipe 422-inlet
424-outlet 430-flow guide

Claims (10)

In a double-head swash plate type compressor,
A cylinder block 100 forming a swash plate chamber for accommodating the rotary shaft 110 and the swash plate 120;
Cylinder bores (130, 140) radially disposed in front of and behind the cylinder block (100);
A cylinder head 200 coupled to the cylinder bores 130 and 140 and forming discharge chambers 220 and 240 therein;
A transmission passage (150) formed through the cylinder block (100) to connect the discharge chambers (220, 240) so as to be able to communicate with each other;
An oil separation chamber 410 which can communicate with at least one of the discharge chambers 220 and 240 to communicate with the transfer passage 150 and the oil recirculation passage 160, respectively; And
And an oil separation pipe (420) installed in the oil separation chamber (410) in a double pipe structure to separate the oil component in the refrigerant and provide the oil component to the recirculation passage (160). The method according to claim 1,
Wherein the oil separation chamber (410) is disposed in a direction transverse to the cross-section of the cylinder head (200). The method according to claim 1,
Wherein the oil separation chamber (410) is disposed in a direction transverse to the central portion of the cross section of the cylinder head (200). The method according to claim 2 or 3,
Wherein the oil separation chamber (410) is inclined with respect to the transverse section of the cylinder head (200) with respect to the horizontal direction. The method according to claim 1,
Wherein the oil separation chamber (410) forms an inlet (412) for communication with the discharge chambers (220, 240) and an outlet (414) for communication with the recirculation passage (160) Expression compressor. The method of claim 5,
Wherein the inlet (412) is located at an upper portion inside the oil separation chamber (410), and the outlet (414) is located at a lower portion inside the oil separation chamber (410). The method of claim 6,
Wherein the outlet (414) is provided with an orifice (416) for pressure drop of the oil. The method of claim 5,
The oil separating pipe 420 is formed with an inlet 422 for the refrigerant at a position spaced upward from the outlet 414 in the oil separating chamber 410 and at a position opposite to the inlet 422 To form an outlet (424) for the refrigerant. The method of claim 8,
Wherein the oil separation pipe (420) is provided with a flow guide part (430) for reinforcing the downward swirling flow of the refrigerant on the outer circumferential surface inside the oil separation chamber (410). The method of claim 9,
Wherein the flow guide portion (430) is formed of a spiral protrusion formed on an outer peripheral surface of the oil separation pipe (420).

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