JPH07158579A - Horizontal type compressor - Google Patents

Abstract

PURPOSE:To reliably catch and remove iron refuse mixed in lubricating oil through simple constitution by positively discharging iron refuse, stored in an oil gathering chamber in a bearing housing, to the outside. CONSTITUTION:An oil gathering chamber 11 to gather oil fed to the lubrication spot of a bearing housing 5 through a feed oil passage 32 in a drive shaft 3 is formed in a bearing housing 5. An oil return passage 12 through which oil in the oil gathering chamber 11 is returned to an oil reservoir 0 in the inner bottom of a horizontal casing 1 is formed in the bearing housing 5 and meanwhile, an annular magnet 13 is attached to the outlet part of the oil return passage 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal compressor mainly used in refrigeration equipment.

[0002]

2. Description of the Related Art Generally, in a horizontal compressor, it is necessary to remove dusts produced by manufacturing various components such as compression elements and iron-based dusts scraped by abrasion, which are mixed into the lubricating oil.

However, in the conventional horizontal compressor, as described in, for example, Japanese Patent Application Laid-Open No. 1-96490, a compression element and a motor are provided in a horizontal casing, and the motor is rotated by a drive shaft of the motor. To drive the compression element, form an oil supply passage in the drive shaft, and provide an oil pump at the end of the drive shaft opposite to the compression element to supply oil to each sliding portion of the compression element and the like. I have to. That is, as shown in FIG. 4, the conventional horizontal compressor has the first and second bearing housings B1 and B on both sides in the longitudinal direction inside the horizontal casing A.
2 are provided respectively to support a compression element C composed of a fixed scroll C1 and a movable scroll C2 in the first bearing housing B1, and a fixing bolt or the like is interposed between the first and second bearing housings B1 and B2. Motor D
While holding in a sandwiched manner, both sides in the length direction of the drive shaft E extending from the motor D are supported by the housings B1 and B2 via first and second bearings F1 and F2.
A tubular transmission portion E1 eccentric to the axis of the drive shaft E is provided on the end of the drive shaft E facing the movable scroll C2, and the transmission is provided on the movable scroll C2 side. A pin portion C3 that fits into the portion E1 is provided in a protruding manner to rotatably support the pin portion C3 in the transmission portion E1 via a third bearing F3, and at the same time, the movable scroll C2 and the first bearing housing. An Oldham ring G is interposed between the movable scroll C2 and B1 so that the movable scroll C2 is revolved with respect to the fixed scroll C1 by the rotation of the drive shaft E accompanying the drive of the motor D.

Further, an oil supply passage H is formed inside the shaft center of the drive shaft E, and a pumping pipe P1 which faces the bottom oil sump O of the casing A is formed at the end of the drive shaft H on the side opposite to the compression element. Is attached to the oil pump P so that the oil in the oil reservoir O is pumped from the pumping pipe P1 to the oil supply passage H.
The bearings F1 to F3 are supplied with this pumping oil to be lubricated. In the compressor shown in FIG. 4, the drive shaft E is used as the tubular transmission portion E1.
A counterweight E2 that is eccentric to the counterweight E2, and a cylindrical swing link E that is pin-connected to the counterweight E2.
3 and the pin portion C is provided in the swing link 73.
3 is rotatably supported via the third bearing F3, the end of the oil supply passage H on the compression element side is opened in the third bearing F3, and the oil is supplied from the oil supply passage H for lubrication. ing. In addition, the first and second drive axes E
Oil holes H1 and H2, which are branched from the oil supply passage H and extend radially outward, are formed at positions facing the bearings F1 and F2.
The oil supplied from the oil holes H1 and H2 lubricates the first and second bearings F1 and F2.

Further, an oil collecting chamber I for collecting oil after lubricating the first and third bearings F1 and F3 is formed inside the first bearing housing B1.
An oil return passage J for returning the oil in the oil collecting chamber I to the oil sump O is formed on the lower side of the bearing housing B1 to form the first bearing F.
The oil after lubricating 1 is transferred to the oil collecting chamber I through the gap between the counterweight E2 and the first bearing housing B1.
Further, the oil after lubricating the third bearing F3 is discharged into the oil collecting chamber I through the gap between the swing link E3 and the Oldham ring G, and the oil returning passage J is discharged from the oil collecting chamber I. It returns to the oil sump O via.

A magnet K is attached near the bottom of the pumping pipe P1 of the oil pump P at the bottom wall of the oil sump O,
The magnet K is adapted to adsorb and remove iron-based dust mixed in the lubricating oil in the oil reservoir O.

[0007]

By the way, the iron-based dust mixed in the lubricating oil includes the oil supplied to the first and third bearings F1 and F3, including the generation of dust due to wear at each sliding portion. It is easy to collect in the oil collecting chamber I for collecting
Is formed on the side of the compression element C, while the magnet K is
To prevent the pumping of dust into the oil pump P, the pumping pipe P1 of the oil pump P is provided on the side opposite to the collecting chamber I.
Since the magnets K are mounted in the vicinity, the magnetic force of the magnet K does not reach the oil collecting chamber I, so that the iron-based dust accumulated in the oil collecting chamber I is positively and forcefully discharged to the outside by the magnet K. could not. Moreover, in the vicinity of the pumping pipe P1 of the oil pump P in which the magnet K is arranged, the oil flow in the oil sump O is relatively slow, so the magnet K is arranged in the oil sump O. However, since the amount of oil flow is small, it is difficult for dust to be carried to the magnet K, and the probability that dust is captured by the magnet K is low. It may be sent. further,
Since the casing wall portion of the oil sump O on which the magnet K is attached has a curved surface, in order to securely attach the magnet K, the wall portion is flattened so as to be flush with the magnet K. Therefore, it is necessary to adsorb and hold the magnet K on the flattened portion, or to attach the magnet K to the wall portion via another member K1 such as a bolt or a nut as shown in FIG. There was also a problem that the configuration became complicated.

An object of the present invention is to horizontally discharge iron-based dust stored in the oil collecting chamber and remove it, and to reliably catch the iron-based dust mixed in the lubricating oil with a simple structure. To provide a compressor.

[0009]

In order to achieve the above-mentioned object, the invention according to claim 1 comprises, in a horizontal casing 1, a compression element 2 and a motor 4 having a drive shaft 3 for driving the compression element 2. , A bearing housing 5 having a bearing portion 51 supporting the compression element 2 side of the drive shaft 3, and lubricating the drive shaft 3 with oil pumped from an oil pump P provided at the end of the anti-compression element side. In the horizontal compressor in which the oil supply passage 32 for supplying oil to the location is formed, an oil collecting chamber 11 is formed in the bearing housing 5 for collecting the oil supplied from the oil supply passage 32 to the lubrication portion of the bearing housing 5, and
The bearing housing 5 is provided with an oil return passage 12 for returning the oil in the oil collecting chamber 11 to the oil sump O at the bottom of the casing 1, and a magnet 13 is attached to the outlet of the oil return passage 12. .

The invention according to claim 2 is the magnet 1
3 is formed in a ring shape having a passage inner diameter larger than the inner diameter of the oil return passage 12.

Further, in the invention according to claim 3, the suction pipe 9 is connected to the suction port of the compression element 2, the discharge pipe 10 is opened in the horizontal casing 1, and the casing 1 is formed as a high-pressure dome. At the same time, a discharge chamber 1A in which the discharge port of the compression element 2 is opened is formed on the side opposite to the motor of the casing 1, and the discharge chamber 1A is communicated with the motor chamber 1B, while the outlet portion of the oil return passage 12 is provided. Magnet 13
Is extended to the communication side between the discharge chamber 1A and the motor chamber 1B.

[0012]

According to the first aspect of the invention, since the magnet 13 is attached to the outlet of the oil return passage 12 communicating with the oil collecting chamber 11, the magnet 13 can easily collect iron-based dust.
1 will be installed close to this oil collecting chamber 1
The magnetic force of the magnet 13 is positively applied to the iron-based dust in the inside of 1 to promote discharge to the outside, and further, the oil return passage 12
In this case, since the oil flow is fast and the magnet 13 is arranged at the outlet of the oil return passage 12, dust discharged into the casing 1 due to the oil flow is captured by the magnet 13. Since the dust is reliably captured by the magnet 13 at a location away from the oil pump P, the dust is pumped up again from the oil pump P together with the oil and the lubrication locations Can be prevented from being sent to. Moreover, since the bearing housing 5 in which the oil return passage 12 is provided is usually made of an iron-based material capable of adsorbing the magnet 13, the outer circumference of the bearing housing 5 on the outlet side of the oil return passage 12 is reduced. By forming a flat surface portion on the flat surface portion to directly adsorb and hold the magnet 13 on the flat surface portion, or by forming a magnet mounting hole or the like around the outlet side outer periphery of the oil return passage 12 and press-fitting the same. The magnet 13 can be attached to the bearing housing 5 with a simple structure and at low manufacturing cost, without requiring a separate member.

According to the second aspect of the invention, since the magnet 13 is formed in a ring shape having a passage inner diameter larger than the inner diameter of the oil return passage 12, the oil return passage 12 is connected to the oil reservoir O. Even if the iron-based dust in the returned oil is captured by the inner peripheral surface of the magnet 13, the discharge passage can be sufficiently secured,
The oil discharged from the oil return passage 12 can be satisfactorily returned to the oil reservoir O side without the passage resistance being given by the dust captured by the magnet 13.

Further, in the invention according to claim 3, the suction pipe 9 is connected to the suction port of the compression element 2, and the discharge pipe 10 is opened in the horizontal casing 1, so that the casing 1
Is formed in a high-pressure dome, and a discharge chamber 1A in which a discharge port of the compression element 2 is opened on the side opposite to the motor of the casing 1.
Is formed to communicate the discharge chamber 1A with the motor chamber 1B, and the magnet 13 provided at the outlet of the oil return passage 12 is formed.
Is extended to the communication side between the discharge chamber 1A and the motor chamber 1B, the iron-based dust mixed in the oil returned from the oil return passage 12 to the oil sump O by the magnet 13 is discharged to the outlet of the oil return passage 12. The iron-based dust in the oil that flows from the discharge chamber 1A to the motor chamber 1B while being surely captured by the portion is a communicating portion in which the flow of the gas fluid and the oil from the discharge chamber 1A to the motor chamber 1B is fast. In the above, since it can be captured by the extension portion of the magnet 13, the removal of the dust by the magnet 13 can be performed more effectively.

[0015]

FIG. 1 shows a horizontal compressor of high-pressure dome type, which is composed of a fixed scroll 21 and a movable scroll 22 on one side in the longitudinal direction inside a horizontal casing 1 having an oil sump O at the inner bottom thereof. And a motor 4 having a drive shaft 3 for driving the compression element 2 on the other side of the casing 1, and a first bearing on the compression element side of the motor 4. A housing 5 is provided so that the fixed and movable scrolls 21 and 22 are supported by the first bearing housing 5, and a second bearing housing 6 is provided on the side of the motor 4 opposite to the compression element. Both sides of the drive shaft 3 in the longitudinal direction are supported by bearings via first and second bearings 71 and 72 provided in the bearing portions 51 and 61 of the two bearing housings 5 and 6.

More specifically, a cylindrical transmission portion 31 eccentric to the axis of the drive shaft 3 is provided on the end of the drive shaft 3 facing the movable scroll 22, and the movable scroll is provided. A pin portion 23 that fits into the transmission portion 31 is provided on the 22 side so as to rotatably support the pin portion 23 in the transmission portion 31 via a third bearing 73, and the movable scroll. An Oldham ring 8 is interposed between the second scroll 22 and the first bearing housing 5, and the movable scroll 22 is revolved with respect to the fixed scroll 21 by the rotation of the drive shaft 3 accompanying the drive of the motor 4. ing.

In the embodiment shown in FIG. 1, a slide bearing is used as the first bearing 71 provided in the bearing portion 51 of the first bearing housing 5, and the first bearing 71 is used as the cylindrical transmission portion 31.
Is interposed between the outer peripheral surface of the first bearing housing 5 and the inner peripheral surface of the bearing portion 51 of the first bearing housing 5, and a rolling bearing is used as the second bearing 72 provided in the bearing portion 61 of the second bearing housing 6. Then, the second bearing 72 and the outer peripheral surface on the shaft end side of the drive shaft 3 projecting from the motor 4 to the side opposite to the compression element and the second end
It is interposed between the inner peripheral surface of the bearing portion 61 of the bearing housing 6 and a sliding bearing is used as the third bearing portion 73. The third bearing 73 is used for the outer peripheral surface of the pin portion 23 and the transmission portion 31. It is inserted between the inner surface of the.

In addition, an oil supply passage 32 is formed inside the shaft center of the drive shaft 3 so as to penetrate in the longitudinal direction thereof, and oil is pumped to the drive shaft 3 on the side opposite to the compression element of the motor 4 depending on the rotation speed. A trochoidal type positive displacement oil pump P whose amount is variable is attached, and the oil in the bottom oil reservoir O provided in the casing 1 is supplied by the oil pump P to the oil supply passage 32.
The pumping oil is forcibly pumped to the first to third bearings 71 to 73 for positive lubrication. More specifically, an oil groove 33 extending in an oblique direction is formed on the outer peripheral surface of the tubular transmission portion 31 facing the first bearing 71, and one end side of the oil groove 33 in the length direction is formed on the drive shaft 3. Is communicated with the oil supply passage 32 via an oil hole 34 penetrating in the radial direction, so that the oil pumped up into the oil supply passage 32 is supplied to the first bearing 71 through the oil hole 34 and the oil groove 33. An oil hole is provided between the inner peripheral surface and the outer peripheral surface of the transmission portion 31, and an oil hole penetrating in the radial direction at a portion of the drive shaft 3 facing the second bearing 72 to communicate with the oil supply passage 32. (Not shown) is formed so that the pumping oil to the oil supply passage 32 is supplied to the second bearing 72 through the oil hole, and further, the inner bottom side of the tubular transmission portion 31 is formed. And the pin portion 23, the oil supply passage 32 is opened, and Provided oil supply gap 35 communicating with the bearing 73, so that lubrication of the pumping oil into the oil supply passage 32 on the side the third bearing 73 through the gap 35.

Further, each scroll 2 of the compression element 2
The suction port formed on the back surface of the fixed scroll 21 communicates with the compression chamber formed between the first and second 22nd sides of the compression element 2 from the outside of the compression element 2 at one side in the longitudinal direction. A suction port 9 to be inserted is connected, and a discharge port that opens to a space opposite to the motor side of the compression element 2 in the casing 1 is provided on the back surface of the fixed scroll 21. A discharge chamber 1A for discharging a high-pressure gas fluid is formed from the outlet, and this discharge chamber 1A is communicated with a motor chamber 1B in which the motor 4 is installed. A discharge space 1C communicating with the discharge chamber 1A and the motor chamber 1B is formed on the side opposite to the compression element, and a discharge pipe 10 is opened in the discharge space 1C so that the casing 1 is filled with a high-pressure gas fluid. High pressure It is the over-time. Then, the gas fluid sucked from the suction pipe 9 is transferred to the scrolls 2
1 and 22 is introduced into the compression chamber and compressed, and the compressed high-pressure gas fluid is discharged to the discharge chamber 1A, and the motor chamber 1B and the discharge space 1C are discharged from the discharge chamber 1A as shown by the arrow in FIG. And is discharged to the outside through the discharge pipe 10 opened in the discharge space 1C.

In the above structure, however, the first
Inside the bearing housing 5, around the end of the tubular transmission portion 31 on the movable scroll 22 side, the first bearing 71 interposed between the bearing portion 51 of the first bearing housing 5 and the transmission portion 31. And an oil collecting chamber 11 that collects the oil discharged by supplying oil to the third bearing 73 interposed between the transmission portion 31 and the pin portion 23, and
An oil return passage 12 that communicates with the oil collecting chamber 11 and is opened to the motor chamber 1B in the casing 1 is provided on the lower side of the bearing housing 5, and the oil collecting passage 12 is provided with the oil returning passage 12. The oil collected in the chamber 11 is returned to the bottom oil sump O of the casing 1, while the magnet 13 is attached to the outlet of the oil return passage 12. Incidentally, FIG.
In the above, the seal ring 14 is disposed inside the oil collecting chamber 11, and the seal ring 14 is constantly pressed against the back surface of the movable scroll 22 by a wave washer or the like that constantly urges the movable scroll 22 side. The space on the back side of the movable scroll 22 is divided into a high pressure region and a low pressure region.

Further, the magnet 13 is formed in a ring shape, and its inner diameter T1 is larger than the diameter T2 of the oil return passage 12 (T1> T2), as is apparent from FIG. And the internal passage of the magnet 13 and the oil return passage 12 are aligned and attached.

When attaching the magnet 13 to the first bearing housing 5, as is apparent from FIG.
A mounting hole 5a is formed on the outer periphery of the outlet side of the oil return passage 12 in the first bearing housing 5 by counter boring, and the magnet 13 is mounted in the mounting hole 5a. At this time, when the first bearing housing 5 is made of an iron-based material capable of attracting the magnet 13,
The oil return passage 12 in the first bearing housing 5
A flat surface portion may be provided on the outlet side outer surface side so that the magnet 13 is directly attracted and held on the flat surface portion, or may be press-fitted into the mounting hole 5a.

Next, the operation of the above configuration will be described. When the compressor is driven, lubricating oil is supplied from the bottom oil sump O of the casing 1 by the oil pump P to the oil supply passage 3
2 is forcibly pumped up to the second bearing 72 interposed between the bearing portion 61 of the second bearing housing 6 and the drive shaft 3, and the first bearing housing 5 The first bearing 71 interposed between the bearing portion 51 of the drive shaft 3 and the tubular transmission portion 31 of the drive shaft 3, and further interposed between the transmission portion 31 and the pin portion 23 of the movable scroll 22. Third
The bearings 73 are supplied with oil. The lubricating oil supplied to the bearings 71, 73 in the first bearing housing 5 is collected in the oil collecting chamber 11 and the oil collecting chamber 11
1 to the motor chamber 1B through the oil return passage 12 and the internal passage of the magnet 13 attached to the outlet side of the oil return passage 12 from the motor chamber 1B to the oil reservoir O. Returned to. The oil supplied to the second bearing 72 is directly returned from the bearing 72 to the oil reservoir O as it is.

When the lubricating oil in the oil collecting chamber 11 is returned from the oil return passage 12 to the oil reservoir O, the magnet 13 is attached to the outlet side of the oil return passage 12 and its internal passage is Since it is returned to the oil sump O, the iron-based dust mixed in the return oil from the oil return passage 12 is favorably captured by the magnet 13, and particularly, the oil flow in the oil return passage 12 Since the speed is high, the probability that the dust is captured by the magnet 13 can be increased by disposing the magnet 13 in the oil return passage 12. Further, since this dust is reliably captured by the magnet 13 at a position away from the oil pump P, the dust is pumped up again from the oil pump P together with the oil, and the bearings 7 are removed.
1, 72, 73 and the like, and the magnet 13 is disposed near the oil collecting chamber 11 on the outlet side of the oil return passage 12 where iron-based dust easily collects. Therefore, it is possible to positively apply the magnetic force of the magnet 13 to the iron-based dust in the oil collecting chamber 11 to promote the discharge to the outside. Therefore, the magnet 13 can properly capture the dust. It can be removed.

Moreover, when mounting the magnet 13 on the first bearing housing 5 side, as described above,
A mounting hole 5a is formed in the bearing housing 5 around the outlet side of the oil return passage 12 by counter boring, and the magnet 13 is mounted in the mounting hole 5a by press fitting or the first bearing. The housing 5 to the magnet 13
Is formed of an iron-based material that can be attracted, a flat portion is provided on the first bearing housing 5, and the magnet 13 is directly attracted to and held by the flat portion, so that another member can be used as in the conventional case. Therefore, the magnet 13 can be attached to the first bearing housing 5 with a simple structure and at a low manufacturing cost, without requiring.

Since the inner diameter T1 of the inside of the magnet 13 is larger than the diameter T2 of the oil return passage 12, the magnet 13 is returned to the oil reservoir O from the oil return passage 12. Even if the iron-based dust in the oil to be collected is trapped in the internal passage of the magnet 13, the oil return passage can be sufficiently secured on the inner peripheral side of the magnet 13, so that the oil discharged from the oil return passage 12 can be prevented. It is possible to surely and satisfactorily return the oil to the oil reservoir O side without receiving resistance from dust captured by the magnet 13.

Further, in the high pressure dome type horizontal compressor as described above, as shown in FIG.
3, an extension 13a is formed from the periphery of the outlet of the oil return passage 12 to a communicating portion between the discharge chamber 1A of the casing 1 and the motor chamber 1B, and the oil return passage 12 is provided at one end in the length direction. A long magnet 13 having a large diameter hole may be attached. In FIG. 3, the first
The bearing housing 5 is made of an iron-based material, a flat surface portion is formed on the outer surface of the first bearing housing 5 on the outlet side of the oil return passage 12, and the magnet 13 is directly attracted to and held by the flat surface portion.

With the above structure, the magnet 13 is used.
Thus, while iron-based dust mixed in the oil returned from the oil return passage 12 to the oil sump O can be reliably captured at the outlet of the oil return passage 12, as shown by the arrow in FIG.
The iron-based dust in the oil flowing from the discharge chamber 1A to the motor chamber 1B is also captured by the extension portion of the magnet 13 in the communicating portion where the gas fluid and the oil flow from the discharge chamber 1A to the motor chamber 1B flow quickly. The magnet 13
The dust can be more effectively removed by the method. The magnet 13 described above does not necessarily have to be ring-shaped, but may be rod-shaped or plate-shaped, for example.

[0029]

As described above, according to the first aspect of the invention, the oil collecting chamber for collecting the oil supplied from the oil supply passage 32 to the lubrication portion of the bearing housing 5 in the bearing housing 5. 11 and a bearing housing 5 is formed with an oil return passage 12 for returning the oil in the oil collecting chamber 11 to the oil reservoir O at the bottom of the casing 1, while a magnet is provided at the outlet of the oil return passage 12. Since the magnet 13 is attached, the magnet 13 can easily collect iron-based dust in the oil collecting chamber 11.
Will be installed close to the oil collecting chamber 11
The magnetic force of the magnet 13 can be positively applied to the iron-based dust inside to accelerate the discharge to the outside. Further, the oil flow in the oil return passage 12 is fast, and the oil return passage 12 Since the magnet 13 is arranged at the outlet of
By capturing the dust discharged into the casing 1 with the flow of oil by the magnet 13, the probability of capturing the dust of the magnet 13 can be increased, and the dust is separated from the oil pump P. Since it is reliably captured by the magnet 13, it is possible to prevent the dust from being pumped up again with the oil from the oil pump P and sent to the lubrication points. Moreover, since the bearing housing 5 in which the oil return passage 12 is provided is usually made of an iron-based material capable of adsorbing the magnet 13, the outer circumference of the bearing housing 5 on the outlet side of the oil return passage 12 is reduced. By forming a flat surface portion on the flat surface portion to directly adsorb and hold the magnet 13 on the flat surface portion, or by forming a magnet mounting hole or the like around the outlet side outer periphery of the oil return passage 12 and press-fitting the same. The magnet 13 can be attached to the bearing housing 5 with a simple structure and at low manufacturing cost, without requiring a separate member.

According to the second aspect of the present invention, since the magnet 13 is formed in a ring shape having a passage inner diameter larger than the inner diameter of the oil return passage 12, the oil return passage 12 is provided with the oil reservoir. The iron-based dust in the oil returned to O is the magnet 13
Even if it is trapped on the inner peripheral surface of the magnet, the discharge passage can be sufficiently secured, so that the oil discharged from the oil return passage 12 can be collected by the magnet 1
It is possible to satisfactorily return the oil to the oil sump O side without giving a passage resistance due to the dust trapped in 3.

Further, according to the invention described in claim 3, the suction pipe 9 is connected to the suction port of the compression element 2, the discharge pipe 10 is opened in the horizontal casing 1, and the casing 1 is made into a high pressure dome. And a discharge chamber 1A in which the discharge port of the compression element 2 is opened on the side opposite to the motor of the casing 1 and the discharge chamber 1A is communicated with the motor chamber 1B. Since the magnet 13 provided at the outlet portion is extended to the communication side between the discharge chamber 1A and the motor chamber 1B, the iron-based dust mixed in the oil returned from the oil return passage 12 to the oil sump O by the magnet 13 is added to the above. The iron-based dust in the oil flowing from the discharge chamber 1A to the motor chamber 1B while being surely captured at the outlet of the oil return passage 12 is also the gas fluid and the oil flowing from the discharge chamber 1A to the motor chamber 1B. Flow of In fast communication portion, the magnet 1
Since it can be captured by the extension portion of 3, the removal of the dust by the magnet 13 can be performed more effectively.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing the overall structure of a horizontal compressor according to the present invention.

FIG. 2 is a sectional view showing a first embodiment.

FIG. 3 is a sectional view showing a second embodiment.

FIG. 4 is a vertical sectional view showing a conventional horizontal compressor.

[Explanation of symbols]

 1 horizontal casing 1A discharge chamber 1B motor chamber 2 compression element 3 drive shaft 32 oil supply passage 4 motor 5 (first) bearing housing 51 bearing portion 9 suction pipe 10 discharge pipe 11 oil collecting chamber 12 oil return passage 13 magnet O oil sump P Oil pump

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Hitoshi Shibata, 3-12, Chikko Shinmachi, Sakai City, Osaka Prefecture Daikai Industry Co., Ltd., Sakai Manufacturing Co., Ltd. Daikin Kogyo Co., Ltd. Sakai Seisakusho's seaside factory (72) Inventor Noboru Murata No. 3-12 Chikko Shinmachi, Sakai City, Osaka Prefecture Daikin Kogyo's Sakai Seisakusho's seaside factory

Claims (3)

[Claims] 1. A compression element (2) and a drive shaft (3) for driving the compression element (2) in a horizontal casing (1).
And a bearing housing (5) having a bearing portion (51) for supporting the compression element (2) side of the drive shaft (3), and the drive shaft (3) includes: In a horizontal compressor having an oil supply passage (32) for supplying oil to be lubricated to an oil pump (P) provided at an end of the anti-compression element side, the oil supply passage (32) is provided in the bearing housing (5). From the above) to an oil collecting chamber (11) for collecting the oil supplied to the lubrication point of the bearing housing (5), and at the same time, the bearing housing (5) is provided with the oil collecting chamber (1).
An oil return passage (12) for returning the oil of 1) to the oil sump (O) at the inner bottom of the casing (1) is formed, and a magnet (13) is attached to the outlet of the oil return passage (12). A horizontal compressor characterized in that 2. The horizontal compressor according to claim 1, wherein the magnet (13) is formed in a ring shape having a passage inner diameter larger than the inner diameter of the oil return passage (12). 3. A suction pipe (9) at the suction port of the compression element (2).
And a discharge pipe (10) is opened in the horizontal casing (1) to form the casing (1) into a high-pressure dome, and the compression element (2) is provided on the side opposite to the motor of the casing (1). Forming a discharge chamber (1A) having an opening of the discharge port of (1A) and communicating the discharge chamber (1A) with the motor chamber (1B), the magnet (1) provided at the outlet of the oil return passageway (12).
The horizontal compressor according to claim 1 or 2, wherein 3) is extended to a side where the discharge chamber (1A) and the motor chamber (1B) communicate with each other.