JPS5823032Y2 - horizontally opposed compressor - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a horizontally opposed compressor in which two double-headed pistons arranged in parallel in the horizontal direction reciprocate within a cylinder. This relates to the miniaturization of compressors by digging and forming long and narrow gas passages.

A horizontally opposed compressor, in which double-headed pistons are slidably fitted in parallel cylinders, has cylinder 1 as shown in Figure 2.
A double-headed piston 30.30 slidably fitted to the slider 29.2 is attached to the outer periphery of the eccentric cam portion 28.28 by rotation of the drive shaft 27 passing through the intermediate portion of the piston.
9, the suction gas is compressed and discharged.

In such a horizontally opposed compressor, valve covers 21 a , 21 b are attached to the left and right cylinder opening end faces 16 a s 16 b of the cylinder body 3 via valve seat plates 22 a , 22 b , respectively.
22a, the compressor had the disadvantage of increasing horizontal bulge.

That is, in the conventional horizontally opposed compressor as shown in FIG. The discharged gas from body 3
Merge within a.

At this time, the passage 51 that allows the discharged gases discharged in the same direction to merge into the valve cover must be formed in a volumetric space with an appropriate height Hl to lower the flow resistance of the discharged gas.

Therefore, the thickness B1 of the valve cover in the cylinder axis direction increases, and as a result, the horizontal width W1 increases.

Further, in the horizontally opposed type compressor, as is clear from the comparison between FIG. 1, which shows the side surface of the compressor, and FIG. 12, which shows the plane, the width W1 in the horizontal direction is much larger than the height in the vertical direction.

In this regard, if the width W1 in the horizontal direction of the horizontally opposed compressor can be reduced even a little, the overall size of the compressor can be significantly reduced, making it easier to install it in narrow spaces.

Therefore, an object of the present invention is to reduce the horizontal expansion of the compressor due to the left and right valve covers, thereby reducing the size of the compressor.

The feature of this invention is that the cylinders on the left and right sides of the cylinder body of a horizontally opposed compressor are arranged so that the discharge gas discharged in the same direction from parallel cylinders can be merged at the appropriate place in the cylinder body without increasing the flow resistance of the discharge gas. This is due to the fact that a long and narrow groove is formed on the opening end surface and deeply in the direction of the cylinder.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 2, which is a cross-sectional view of FIG. It represents.

In the figure, 1 is the compressor main body.

2 is an electromagnetic clutch attached to the main body.

27 is the drive shaft, and there are two eccentric cam parts 28 and 28 on the shaft.
are formed with a phase difference of 180°.

As shown in FIG. 4, the piston 30 is composed of piston heads 35 and 36 facing outward at both ends in the axial direction, and four pillars connecting the two heads. and each pillar are integrally formed.

Reference numeral 29 denotes an integrated slider, which is attached to the outer periphery of the eccentric cam portion 28.

As shown in FIG. 4, the slider 29 has a ring-shaped copper alloy bushing on its inner periphery, and a substantially rectangular parallelepiped-shaped holder that holds it on its outer periphery, so that it is shaped like a sliding piece.

Reference numeral 3 denotes a cylinder body, and as shown in FIG. 5, two parallel cylinders 15, 15, into which pistons 30, 30 are slidably inserted, extend horizontally through the cylinder body.

Further, in this cylinder body 3, a cavity for disposing a drive shaft 27 therethrough is formed as a space portion 5 within the body, extending horizontally and perpendicularly to the cylinders 15,15.

Reference numerals 31 and 33 denote a front lid and a rear lid that are attached to openings at both ends of the space portion 5, and bearings 32 and 34 that rotatably support the drive shaft 27 are mounted on the inner periphery of each.

Cylinder opening end surface 16a of cylinder body 3.

16b (FIG. 7) are each equipped with a valve device.

As shown in an enlarged view in FIG. 3, which shows the I-1 cross section of FIG. A discharge hole 25 is provided on the side, and the hole 24.25 in the valve seat plate is
A circular suction valve plate and a discharge valve plate with a smaller diameter are set fixed in the center in correspondence with the circular suction valve plate, and the outer peripheral side of each valve plate is bent to open and close in response to the return movement of the piston 30. There is.

Further, the discharge gas chambers 20a, 20b and the suction gas chamber 1 are arranged on the valve seat plates 22a, 22b via sheet packing.
By tightening and fixing the valve covers 21a and 21b having the valve covers 9a and 19b to the cylinder body 3 with a plurality of bolts 38, the discharge gas is prevented from escaping into the suction gas chambers 19a and 19b.

Next, the cylinder body 3 will be described in detail with reference to FIGS. 5 to 8, which show only the cylinder body in an enlarged manner.

The cylinder body 3 (hereinafter referred to as body 3) includes an inlet 4 for introducing return refrigerant gas from the cooling cycle and an outlet 1 for delivering compressed refrigerant gas to the cooling cycle.
0 is integrally formed and protrudes from the outer periphery of the upper part.

This inlet 4 is connected to the upper wall 1 of the body as shown in FIG.
2 into a space 5 in the body, which also extends parallel to the cylinder axis into the upper sector-shaped section 13a, 13b between the parallel cylinders 15,15.
A suction gas passage 6a having a substantially inverted triangular cross section formed by penetrating the
, 6b, the suction gas chamber 19a in both valve covers 21a, 2Ib.

It leads to 19b.

As is clear from FIG. 8, the suction gas passages 6a, 5b communicate with the space 5 in the body 3 at intermediate portions in the cylinder axis direction.

Note that the valve seat plates 22a and 22b have suction gas passages 6a and 6.
A substantially inverted triangular communicating hole 23.23 corresponds to the third
It is formed as shown in the figure.

On the other hand, the discharge port 10 is a discharge gas passage 9 formed in a tunnel shape and protruding above the body upper wall 12 so as to pass through the body 3 above the suction gas passages 6a and 6b in parallel with the suction gas passages. The double force bar 21a passes through the upper part of the peripheral wall 11 and passes through the discharge gas passage 9.

It communicates with the discharge gas chambers 20a, 20b in 2Ib.

This discharge gas passage 9 is connected to the body 3 as shown in FIG.
A suction gas passage 5a extends above the cylinder opening end face 16a w 16b in a direction parallel to the drive shaft 27.

The long grooves 7a and 7b, which are longer than the width in the same direction of the body 6b and deeply dug in the cylinder axial direction, connect the body 3 to the cylinder 15.
．． It is integrally formed with a through hole 8 that penetrates in a direction parallel to the groove 15 and communicates with both the long grooves 7a and 7b, and protrudes from the upper outer periphery of the body in a more intimidating tunnel shape.

In other words, the long grooves 7a and 7b of the discharge gas passage 9 are connected to the drive shaft 2.
By being elongated in the direction perpendicular to 7 and deeply dug in the direction of the cylinder, the compressor can be discharged in the same direction from the parallel cylinders 15 and 15 without increasing the vertical height of the compressor. Provide sufficient space volume to merge the discharged gases.

The long grooves 7a and 7b allow the discharged gas discharged in the same direction from the parallel cylinders to merge within the cylinder body 3, as shown in FIG. 11, which shows the compressor 1 in the same cross-section as in FIG. Therefore, the valve cover 21a is removed while maintaining a sufficient height H of the passageway for merging the discharged gases.

The width B of 21b in the cylinder axis direction can be made extremely small.

As a result, the width W in the horizontal direction of the compressor 1 can be significantly shortened without increasing the flow resistance of the discharged gas. This is clear from the comparison with Figure 12.

Note that elongated holes 26 are formed in the valve seat plates 22a and 22b, as shown in FIGS. long grooves 7a, 7b and helad cover 21 a s 2
Discharge gas chamber 20a in 1b.

20b are in communication.

Also, the valve seat plate 22a. The discharge gas chamber 20a communicates with the long hole 26 of 22b.

As shown in FIG. 9, which is an enlarged view of the IX-IK cross section of FIG. 3, the surface on the 20b side is formed with a slope 40 that slopes downward toward the elongated hole 26.

Also: In the figure, 11 is a service valve installation port on the low pressure side that communicates with the body internal space 5, and 18
is a service valve attachment port on the high pressure side and communicates with the through hole 8 of the discharge gas path 9.

Reference numeral 14 denotes the bottom wall of the body, and fins are formed on the outer periphery.

Next, the operation of the compressor having the above configuration will be explained.

First, as the drive shaft 27 rotates, the slider 29, which is slidably fitted to the eccentric cam portion '28, changes its position with respect to the axis of the drive shaft 27.

The movement of the slider 29 in a direction perpendicular to the drive shaft 21 is restricted by the piston 30, and displacement of the slider 29 with respect to the piston 30 is permitted only in the direction along the opposing plane.

On the other hand, the piston 30 is slidably fitted to the cylinder 15, and as a result, as the eccentric cam portion 28 rotates, the slider 29 moves the piston 30 into the cylinder 15 while moving relative to the piston in the direction of the slider sliding hole 3T. make a reciprocating motion.

Therefore, as the drive shaft 27 rotates, the piston 3
0.30 reciprocates within the cylinder 15.15 and alternately sucks in and discharges refrigerant gas into the cylinder 15.15 via a valve device.

At this time, low-pressure refrigerant gas flows from the inlet 4 into the space 5 in the body through the inlet, as shown by the dashed line in FIG.

The refrigerant gas that has flowed into the space 5 cools the inside of the body due to its low temperature as the liquid refrigerant remaining in the gas evaporates, and also cools the inside of the body by colliding with the slider etc. The lubricating oil attached to the slider etc. lubricates the sliding surface.

In addition, when a small amount of lubricating oil is sealed in the bottom of the space 5 in the body, the lubricating oil is also scattered by the kinetic energy of the piston or the inflowing gas, and the sliding surfaces are lubricated.

Next, the low-pressure gas in the space portion 5 is transferred from the left and right suction gas passages 6a, 6b formed by penetrating the upper fan-shaped cross-sectional portion 13a, s 13b to the suction gas in the left and right valve covers, as shown in FIG. It flows into the chambers 19a and 19b evenly distributed.

Furthermore, the high-pressure refrigerant gas discharged into the discharge gas chambers 20a and 20b within the valve cover reaches the elongated hole 26 along the slope 40, as shown by the two-dot chain line in FIGS. 3, 9, and 11. The water passes through the elongated hole 26 and flows into the elongated grooves 7a and 7b.

That is, as shown in FIG. 10, which depicts only the discharge gas passage 9 of the body 3, the discharge gas discharged in the same direction from the parallel cylinders 15 and 15 is directed to the long grooves 7a, respectively.
.

It flows into 7b and merges with it.

From the long grooves 7a and 7b, the liquid passes through the through hole 8 as shown in FIG. 1, and is delivered from the discharge port 10 as shown in FIG.

As described above, the present invention has a long groove that is long and thin in the direction parallel to the drive shaft and deeply dug in the cylinder axial direction on the both cylinder opening end surfaces of the cylinder body of a horizontally opposed compressor. , a through hole passing through the body in the cylinder axial direction and communicating the long grooves, and a valve seat plate adapted to both opening end surfaces of the cylinder having a through hole passing through the long groove in correspondence with the long groove. The gas chambers in the left and right valve covers, which are respectively attached to both cylinder opening end faces of the body via valve seat plates, are communicated with the long groove, and the discharged gas is discharged in the same direction from the parallel cylinders. Since they are made to merge within the cylinder body, the width B of the valve cover in the cylinder axis direction can be made extremely small while increasing the height H of the passage where the discharged gases merge and ensuring a sufficient flow passage cross-sectional area. .

As a result, the horizontal width W of the compressor can be significantly reduced without increasing the flow resistance of the discharged gas.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the present invention, and is a side view of a horizontally opposed compressor. FIG. 2 is a cross-sectional plan view showing the cross section of FIG. 1; FIG. 3 is an enlarged sectional view of the valve device section taken along the line m--■ in FIG. 1. FIG. 4 is a perspective view showing the piston and slider of FIG. 1. FIG. 5 is a perspective view showing the cylinder body of FIG. 1. FIG. 6 is a cross-sectional front view (representing the Vl-Vl cross section in FIG. 1) of the cylinder body shown in FIG. 5. FIG. 7 is a partially sectional plan view taken along the line 1--2 in FIG. FIG. 8 is a cross-sectional front view showing the cross section taken along the line ■-■ in FIG. FIG. 9 is an enlarged sectional view showing the cross section at I) (-1 in FIG. 3. FIG. 10 is an explanatory view showing only the discharge gas path of the cylinder body shown in FIG. 5. 1 is a partial cross-sectional plan view of the main parts of the compressor shown in FIG. 1 at the same cross-section as in FIG. 1. FIG. 12 shows a conventional horizontally opposed compressor and is approximately the same as FIG. 11. It is a partial cross-sectional plan view of the main part in the position cross section. Explanation of symbols, 1... Compressor body. 3... Cylinder body. 4... Inlet. 5 ...... Space (inside the cylinder body). 6a, 6b... Suction gas path.?a, 7b.
...long groove. 8...Through hole. 9...Discharge gas path. 10...Exhaust port. 13a, 13b...
Fan-shaped cross section. 15...Cylinder. 27... Drive shaft.
28...Eccentric cam part. 29...Slider. 30... Piston.

Claims (1)

[Claims for Utility Model Registration] Rotation of a drive shaft 27 in which each double-headed piston 30, 30 slidably fitted in two parallel cylinders 15, 15 passes through the intermediate portion of the piston in a direction perpendicular to the piston axis. In a horizontally opposed compressor that is reciprocated by a slider 29 29 attached to the outer periphery of an eccentric cam portion 28 , 28 of the drive shaft 27 , a space portion 5 for passing the drive shaft and a cylinder that are perpendicular to each other are formed inside the compressor. 15.15 is formed horizontally in the cylinder body 3, and on both cylinder opening end surfaces 16a and 15b of the body 3, an elongated cylinder 15.15 is formed on the upper side of the cylinder 15. long grooves 7a and 7b deeply dug in the cylinder axial direction; both long grooves 7a penetrating the body 3 in the cylinder axial direction;
A valve seat plate 22 is formed with a through hole 8 that communicates with the valve seat plate 7b, and is adapted to both the cylinder opening end surfaces 16a and 16b.
A, 22b have long holes 2 corresponding to the long grooves 7a, 7b.
Left and right valve covers 21a are formed to penetrate through the body 3 and are attached to both cylinder opening end surfaces of the body 3 via valve seat plates 22a and 22b, respectively. Is the gas chamber in 21b the long groove? A horizontally opposed compressor, characterized in that the compressor is in communication with a.