JP2000104693A - Horizontal rotary compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To separate the discharged lubricating oil with the separating action by the collision thereof with the inside wall surface of a container by providing a compressed gas blow-out opening at the nearly center in the vertical direction between an oil level of the lubricating oil stored in an oil sump and a discharge pipe, and directing the compressed gas blow-out direction nearly horizontal with the oil level. SOLUTION: A compressed gas blow-out opening part 10d provided in an end of a gas flow passage 10c provided in a cylinder 10 so as to discharge the compressed gas into a sealed vessel 1 nearly vertically to a rotary shaft is provided at the nearly center in the vertical direction between an oil level 100a and a compressed gas inlet of a dicharge pipe 15, and the compressed gas blow-out direction is set so that the discharged compressed gas is blown to the inside wall surface of the sealed vessel 1 without directly colliding with the oil level 100a. The mist-like lubricating oil included in the compressed gas discharged from the compressed gas blow-out opening 10d is separated by the separating action due to the collision with the inside wall surface of the sealed vessel 1. The oil level 100a of the lubricating oil is not raised by the compressed gas, and the quantity of the lubricating oil to be splased is restricted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetically sealed horizontal rotary compressor for compressing a refrigerant gas in a refrigerating apparatus or an air conditioner.

[0002]

2. Description of the Related Art FIG. 6 is a cross-sectional view showing a conventional horizontal rotary compressor disclosed in Japanese Patent Application Laid-Open No. 5-280483, for example. FIG. 7 is a front view of the compression element viewed from the direction of arrow A in FIG. 6 and 7, reference numeral 1 denotes a hermetically sealed container which forms an outer shell of the horizontal rotary compressor and has a lubricating oil 100 at the bottom.
Oil storage department. Reference numeral 2 denotes a stator mounted in the closed casing 1, reference numeral 3 denotes a rotor positioned at a predetermined space in a central space of the stator 2, and reference numeral 4 denotes an electric element unit including the stator 2 and the rotor 3. 6 is a rotating shaft press-fitted into the rotor 3, 7
Is a crankshaft formed integrally with the rotating shaft 6. Reference numeral 8 denotes a main bearing that supports the rotating shaft 6, and 9 denotes an end bearing that supports the rotating shaft 6. Reference numeral 10 denotes a cylinder mounted in the sealed container 1, and a main bearing 8 and an end bearing 9 are fixed to two surfaces on the left and right sides, respectively. Reference numeral 11 denotes a rolling piston fitted to the crankshaft 7 of the rotating shaft 6, which is movably disposed on the inner wall surface of the central space in the cylinder 10 in line contact. The rolling piston 11 is also in contact with a vane (not shown) disposed in the cylinder 10. Reference numeral 12 denotes a compression element portion including the main bearing 8, the end bearing 9, the cylinder 10, and the rolling piston 11. 13 is a cylinder 10 and a rolling piston 11
Is a suction / compression chamber formed in the gap between the cylinder 1
A high-pressure compression chamber and a low-pressure suction chamber are distinguished by a vane (not shown) disposed in the inside of the cylinder. The eccentric rotation of the rolling piston 11 continuously repeats a series of suction / compression steps in which the compression medium, such as a refrigerant gas, is sequentially shifted from a suction stroke to a compression stroke. Further, the lubricating oil 100 is sucked up from the lubricating oil flow path 8a provided in the main bearing 8 by the pressure difference between the high-pressure closed container 1 and the low-pressure suction / compression chamber 13 and supplied to the compression element section 12, whereby the compression element The lubrication of the sliding part of the part 12 and the airtightness of the suction / compression chamber 13 are ensured.

[0003] The compressed gas passes through a discharge valve (not shown), a partition plate 16 and a discharge muffler 17 together with the lubricating oil 100 supplied to the compression element portion 12, and is again supplied to the end bearing 9 and the cylinder 10. It passes through the flow path 10a. Reference numeral 10b denotes a compressed gas blowing opening provided at an end of the compressed gas flow path 10a, which is provided in the closed container 1 so as to discharge the compressed gas below the horizontal direction and below the normal to the closed container. It is. The compressed gas flows through the gas passage 1
The compressed gas is blown into the closed container 1 from the compressed gas blowout opening 10b provided at the end of Oa, flows through the discharge pipe 15, and is sent into the refrigeration circuit.

FIG. 8 is a cross-sectional view showing a conventional horizontal rotary compressor disclosed in Japanese Patent Application Laid-Open No. Sho 60-2199491, in which compressed gas is discharged from a discharge muffler 17 for suppressing pressure pulsation.
Is temporarily discharged into the closed container 1 through a discharge opening 17 a provided in the discharge muffler 17.

FIG. 9 is a cross-sectional view showing a conventional horizontal rotary compressor shown in Japanese Utility Model Application Laid-Open No. 63-138489. Since the pressure is higher, the compressed gas is released into the closed vessel 1 from the pipe 19 directly attached to the compression element section 12, but after the inside of the closed vessel 1 has the same pressure as the compressed gas, the compressed gas is released. Compressed gas released from the pipe 19 while being hardly released into the closed container 1 is discharged from the discharge pipe 15.
And is sent directly to the refrigeration circuit.

[0006]

Since the conventional horizontal rotary compressor is constructed as described above, in the case of Japanese Patent Application No. 04-073662 shown in FIGS. As a result of increasing the amount of oil for the purpose of lubricating the sliding portion of the air conditioner or the sliding portion on both sides of the vane (not shown), the lubricating oil
When the level of the oil level 100a is increased, the compressed gas blowout opening 10b provided at the end of the gas flow path 10a provided in the cylinder 10 is located below the horizontal , The compressed gas blown out from the compressed gas blowing opening 10b winds up the oil surface 100a of the lubricating oil 100, and the compressed gas containing the lubricating oil 100 is sealed. Since sufficient oil separation in the container 1 cannot be performed, the oil containing the lubricating oil 100 is sent out from the discharge pipe 15 to the refrigeration circuit to deteriorate the heat exchange rate in the refrigeration circuit or the required amount of lubricating oil in the compressor. And the rotational shaft 6 and the main bearing 8 or the end bearing 9 are burned.

Further, Japanese Patent Application Laid-Open No. 60-219 shown in FIG.
In 491, since the compressed gas is discharged substantially vertically upward from the discharge opening 17a provided in the discharge muffler 17 so as not to wind up the oil surface 100a of the lubricating oil 100, the compressed gas is discharged into the closed container 1. The distance between the discharge opening 17a and the discharge pipe 15 is short, and the head difference between the discharge pipe 15 and the discharge pipe 15 cannot be sufficiently secured. As a result, the mist-like lubricating oil contained in the compressed gas discharged from the opening 17a is closed. There is a problem that the oil is discharged from the discharge pipe 15 to the refrigeration circuit without sufficient oil separation due to a difference in specific gravity with the refrigerant gas.

Further, Japanese Utility Model Application Laid-Open No. 63-138 shown in FIG.
At 489, the compressed gas is hardly released into the closed container 1 except immediately after the start of the compressor operation, and flows directly from the pipe 19 through the discharge pipe 15 into the refrigeration circuit.
There has been a problem that the mist-like lubricating oil contained in the compressed gas is sent out into the refrigeration circuit without being separated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to perform sufficient oil separation in a closed vessel of a horizontal rotary compressor.

[0010]

According to a first aspect of the present invention, there is provided a horizontal rotary compressor comprising: an electric element portion and a compression element portion housed in a closed container having an oil reservoir at a bottom. A horizontal type rotation provided with a gas flow path provided in a compression element portion for discharging a compressed gas compressed by the compression element portion into a closed container, and a discharge pipe for discharging the compressed gas in the closed container to the outside of the closed container. In the type compressor, the compressed gas blowout opening provided at the end of the gas flow path provided in the compression element portion is substantially centered in the vertical direction with respect to the oil level of the lubricating oil stored in the oil storage portion and the discharge pipe. The compressed gas blowing direction is oriented substantially horizontally with the oil surface.

According to a second aspect of the present invention, there is provided a horizontal rotary compressor including an electric element and a compression element housed in an airtight container having an oil reservoir at the bottom, and compressed by the compression element. In a horizontal rotary compressor having a gas flow path provided in a compression element portion for discharging compressed gas into a closed container, and a discharge pipe for discharging the compressed gas in the closed container to the outside of the closed container, the compression element Oil level in a range between a plane including the compressed gas blowing opening provided at the end of the gas flow path provided at the portion and perpendicular to the rotation axis and a plane including the compressed gas inlet of the discharge pipe and perpendicular to the rotation axis. A shield plate is provided on the top.

According to a third aspect of the present invention, there is provided a horizontal rotary compressor, wherein an electric element and a compression element housed in a closed vessel having an oil reservoir at the bottom, and compressed by the compression element. A gas passage provided in the compression element portion that discharges the compressed gas into the closed container, and a horizontal-type rotary compressor including a discharge pipe that discharges the compressed gas in the closed container to the outside of the closed container, The shortest distance between the compressed gas inlet of the discharge pipe and the compression element portion is set to be smaller than the inner diameter of the discharge pipe.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. The same or corresponding components as those of the conventional example are denoted by the same reference numerals as those of the conventional example.
Description is omitted.

Embodiment 1 Hereinafter, Embodiment 1 will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing a cross section of a main part of a horizontal rotary compressor. FIG. 2 is a front view of the compression element section 12 as viewed from the direction of arrow A in FIG. Reference numeral 10c denotes a gas passage of the compressed gas provided in the cylinder 10 so as to discharge the compressed gas into the closed vessel 1 substantially perpendicularly to the rotating shaft 6. Reference numeral 10d denotes a compressed gas blowing opening provided at an end of the gas flow path 10c, which is provided substantially at the center in the vertical direction with the oil surface 100a of the lubricating oil 100 and the compressed gas inlet 15a of the discharge pipe 15, and has a compressed gas blowing opening. The blowing direction of the compressed gas released from the portion 10d into the closed container 1 is set such that the released compressed gas is blown onto the inner wall surface of the closed container 1 without directly hitting the oil surface 100a.
FIG. 3A is a graph showing the relationship between the compressed gas blowing direction θ and the amount of oil circulating in the refrigeration circuit, and FIG. 3B is an explanatory diagram corresponding to FIG.

This embodiment is constructed as described above, and is provided at the end of a gas passage 10c provided in a cylinder 10 so as to discharge a compressed gas into a closed vessel 1 substantially perpendicularly to a rotating shaft 6. The gas blowing opening 10d is provided substantially at the center in the vertical direction with respect to the oil level 100a and the compressed gas inlet 15a of the discharge pipe 15, and the compressed gas blowing direction is such that the discharged compressed gas does not directly hit the oil level 100a. Set so that it can be sprayed on the inner wall surface of. The mist-like lubricating oil contained in the compressed gas discharged from the compressed gas blowing opening 10d is separated by a separating action due to collision with the inner wall surface of the closed container 1. Also, the compressed gas blowing direction is
It is set so that the released compressed gas is sprayed on the inner wall surface of the sealed container 1 without directly hitting the oil level 100a.
Further, since the compressed gas blowing opening 10d is provided substantially at the center in the vertical direction with respect to the oil surface 100a and the compressed gas inlet 15a of the discharge pipe 15, the head difference to the discharge pipe 15 even after the collision is reduced. Since it is sufficiently secured, the amount of the mist lubricating oil scattered to the upper part of the compressor provided with the discharge pipe 15 is reduced, and the lubricating oil flowing into the refrigeration circuit is reduced.

The compressed gas blowing direction (the blowing direction θ is an angle with respect to the horizontal direction as shown in FIG. 3; the upper direction is plus and the lower direction is minus) and the oil circulation amount in the refrigeration circuit are determined in the experiment of FIG. From the relation, if the compressed gas is discharged downward from the horizontal plane, the oil surface 100a will be wound up, so the oil circulation amount will increase rapidly. Conversely, if the compressed gas is discharged upward from the horizontal plane, the distance to the discharge pipe will be shortened and the head difference will be secured. As a result, sufficient oil separation in the closed vessel 1 cannot be performed, so that the amount of oil circulation increases gradually. When the compressed gas is released in the direction in which θ becomes substantially horizontal to the oil surface, the amount of oil circulation in the refrigeration circuit is minimized.

Here, the gas flow passage 10 is connected to the cylinder 10.
Although the description has been given of the case where the c and the compressed gas blowing opening 10d are provided, the gas flow path and the compressed gas blowing opening may be provided in other components of the compression element unit 12.

Embodiment 2 FIG. Embodiment 2 will be described. In the second embodiment, the shielding plate 18 described below is provided in the first embodiment. In this embodiment, FIG.
The plane including the compressed gas blowing opening 10d provided at the end of the gas passage 10c provided in the cylinder 10 and being perpendicular to the rotating shaft 6 and the compressed gas inlet 15a of the discharge pipe 15 being perpendicular to the rotating shaft 6 as shown in FIG. Oil level 1 in the area between the plane
The shielding plate 18 is provided horizontally on the surface 00a. Instead of covering the entire surface of the oil surface 100a in the closed container 1 with a shield plate, a plane including the compressed gas blowing opening 10d and perpendicular to the rotating shaft 6 and including a compressed gas inlet 15a of the discharge pipe 15 and perpendicular to the rotating shaft 6 are formed. Since the shielding plate is provided only on the oil surface 100a in the range between the flat surface and the oil surface 100a, the oil surface 100a is wound up by the compressed gas discharged into the closed vessel 1 from the compressed gas blowing opening 10d without being complicated. Is effectively suppressed, and the amount of lubricating oil scattered toward the upper part of the compressor provided with the discharge pipe 15 for discharging the compressed gas in the sealed container 1 to the outside of the sealed container 1 is reduced, so that the lubricant flows into the refrigeration circuit Less lubricating oil.

In this embodiment, the gas flow passage 10c and the compressed gas blowing opening 10d are the same as those described in the first embodiment, and the effect of reducing the lubricating oil flowing into the refrigeration circuit is further enhanced. By installing the shielding plate 18,
Even if the gas flow path and the compressed gas blowing opening are not described in the first embodiment, the effect of reducing the lubricating oil take-out can be obtained. In this case, the gas flow passage 10c is provided in the cylinder 10.
Although the description has been given of the case where the compressed gas blowing opening 10d is provided, the gas flow path and the compressed gas blowing opening may be provided in other components of the compression element unit 12.

Embodiment 3 Embodiment 3 will be described. In the present embodiment, the shortest distance between the compressed gas inlet 15a of the discharge pipe 15 for discharging the compressed gas in the closed container 1 to the outside of the closed container 1 and the compression element portion 12 as shown in FIG. It is provided below the inner diameter of the discharge pipe 15. Although the compressed gas enters the discharge pipe 15 through the shortest distance that is equal to or less than the inner diameter, since the shortest distance between the compressed gas inlet 15a of the discharge pipe 15 and the compression element portion 12 is equal to or less than the inner diameter of the discharge pipe 15, the compressed gas Since the compression element portion 12 becomes an obstacle to the flow path and the mist-like lubricating oil contained in the compressed gas is separated, the lubricating oil flowing into the refrigeration circuit is reduced. The same effect can be obtained by separately providing an obstacle in the flow path leading to the compressed gas inlet 15a of the discharge pipe 15 so that the narrow portion of the flow path is smaller than the inner diameter of the discharge pipe 15. Be up.

In this embodiment, the gas flow passage 10c and the compressed gas blowing opening 10d are the same as those described in the first embodiment, and the effect of reducing the lubricating oil flowing into the refrigeration circuit is further enhanced. However, by using the compression element 12 as an obstacle to the flow path of the compressed gas, the lubricating oil take-out reduction effect can be achieved without using the gas flow path and the compressed gas blowing opening as described in the first embodiment. Is obtained.

The compressed gas blowing opening 10d in the first embodiment, which is a characteristic component in each of the first, second and third embodiments, is provided substantially at the center of the oil level and the discharge pipe 15 in the vertical direction. The blowing direction is directed substantially horizontal to the oil level, the installation of the shielding plate 18 of the second embodiment, and the shortest distance between the compressed gas inlet of the discharge pipe 15 and the compression element portion 12 of the third embodiment is the inner diameter of the discharge pipe 15. Although the followings have the effect of reducing the carry-out of lubricating oil from the compressor even when used alone, the effect is further increased by combining two or three of these elements. By combining the characteristic components, the mist-like lubricating oil contained in the compressed gas discharged from the compressed gas blowing opening is first separated by collision with the inner wall surface of the closed container, and then the compressed gas is separated. Goes to the compressed gas inlet of the discharge pipe without winding up the oil level, and even immediately before the last discharge, the compression element part obstructs the gas flow path and mist-like lubricating oil is separated. The effect of oil separation can be improved.

[0023]

According to the first aspect of the present invention, the electric element portion and the compression element portion housed in the closed container having the bottom as the oil storage portion, and the compressed gas compressed by the compression element portion are supplied to the closed container. In a horizontal rotary compressor equipped with a gas flow path provided in a compression element portion that discharges air into the inside and a discharge pipe that discharges compressed gas in a closed container to the outside of the closed container, a gas flow provided in the compression element portion The compressed gas blowing opening provided at the end of the road is provided substantially at the center in the vertical direction with respect to the oil surface of the lubricating oil stored in the oil storing portion and the discharge pipe, and the compressed gas blowing direction is substantially horizontal with the oil surface. As a result, the atomized lubricating oil contained in the compressed gas discharged from the compressed gas blowout opening is separated by a separating action due to collision with the inner wall surface of the closed container. Also, since the compressed gas does not raise the oil level of the lubricating oil and the head difference up to the discharge pipe is ensured, oil separation in the closed vessel is sufficiently performed and lubrication flowing into the refrigeration circuit Less oil.

According to the second aspect of the present invention, the electric element and the compression element portion housed in the closed container having the oil reservoir at the bottom, and the compressed gas compressed by the compression element portion is discharged into the closed container. End of the gas flow path provided in the compression element portion in a horizontal rotary compressor having a gas flow path provided in the compression element portion to be compressed and a discharge pipe discharging the compressed gas in the closed container to the outside of the closed container. A shield plate is provided on the oil surface in a range between the plane including the compressed gas blowing opening provided in the section and perpendicular to the rotation axis and the plane including the compressed gas inlet of the discharge pipe and perpendicular to the rotation axis. The plate does not have a complicated shape, the oil surface is effectively prevented from being raised by the compressed gas, and the amount of mist lubricating oil scattered in the sealed container is reduced, so the lubricating oil flowing into the refrigeration circuit Is reduced.

According to the third aspect of the present invention, the electric element and the compression element section housed in the closed vessel having the bottom as the oil storage section, and the compressed gas compressed by the compression element section are stored in the closed vessel. In a horizontal rotary compressor provided with a gas flow path provided in the compression element portion for discharging and a discharge pipe for discharging compressed gas in a closed container to the outside of the closed container, a compressed gas inlet of a discharge pipe and the compression Since the shortest distance from the element part is smaller than the inner diameter of the discharge pipe, the compressed element part becomes an obstacle in the flow path of the compressed gas, and the mist lubricating oil contained in the compressed gas is separated, so it enters the refrigeration circuit. The amount of lubricating oil flowing out is reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a horizontal rotary compressor according to Embodiment 1 of the present invention.

FIG. 2 is a front view of a compression element portion of the horizontal rotary compressor according to the first embodiment of the present invention.

FIG. 3 is a diagram illustrating a relationship between a discharge gas blowing direction angle and an oil circulation amount of the horizontal rotary compressor according to the first embodiment of the present invention.

FIG. 4 is a cross-sectional view of a main part of a horizontal rotary compressor according to a second embodiment of the present invention.

FIG. 5 is a cross-sectional view of a main part of a horizontal rotary compressor according to Embodiment 3 of the present invention.

FIG. 6 is a cross-sectional view of a main part showing an example of a conventional horizontal rotary compressor.

FIG. 7 is a front view of a compression element portion showing an example of a conventional horizontal rotary compressor.

FIG. 8 is a cross-sectional view showing another example of a conventional horizontal rotary compressor.

FIG. 9 is a cross-sectional view showing still another example of the conventional horizontal rotary compressor.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Closed container, 4 Electric element part, 8a Lubricating oil flow path, 10c gas flow path, 10d compressed gas blowing opening, 12 compression element part, 15 discharge pipe,
18 shielding plate, 100 lubricating oil, 100a oil level.

 ──────────────────────────────────────────────────続 き Continued on front page (72) Inventor Hideaki Maeyama 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. (72) Inventor Fumihiko Ishizono 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Rishi Electric Co., Ltd. (72) Inventor Mutsumi Kato 2-3-2 Marunouchi, Chiyoda-ku, Tokyo F-term (reference) 3H029 AA04 AA15 AA21 AB03 BB02 BB05 CC25 CC33 CC44

Claims (3)

[Claims] 1. An electric element part and a compression element part housed in a closed container having a bottom as an oil storage part, and the compression for discharging compressed gas compressed by the compression element part into the closed container. In a horizontal rotary compressor provided with a gas flow path provided in an element portion and a discharge pipe for discharging compressed gas in a closed container to the outside of the closed container, an end portion of the gas flow path provided in the compression element portion The compressed gas blowing opening provided in the oil reservoir is provided substantially at the center in the vertical direction with respect to the oil level of the lubricating oil stored in the oil storage section and the discharge pipe, and the compressed gas blowing direction is oriented substantially horizontally with the oil level. A horizontal type rotary compressor characterized by the above-mentioned. 2. An electric element and a compression element portion housed in a closed container having an oil reservoir at a bottom thereof, and the compression element discharging compressed gas compressed by the compression element portion into the closed container. In a horizontal rotary compressor provided with a gas flow path provided in the compression section and a discharge pipe for discharging the compressed gas in the closed vessel to the outside of the closed vessel, at the end of the gas flow path provided in the compression element section A shielding plate is provided on the oil surface in a range between a plane including the provided compressed gas blowing opening and perpendicular to the rotation axis and a plane including the compressed gas inlet of the discharge pipe and perpendicular to the rotation axis. Horizontal type rotary compressor. 3. An electric element and a compression element portion housed in a closed container having a bottom as an oil storage portion, and the compression element for discharging compressed gas compressed by the compression element portion into the closed container. In the horizontal rotary compressor provided with a gas flow path provided in the section, and a discharge pipe for discharging the compressed gas in the closed vessel to the outside of the closed vessel, the compressed gas inlet of the discharge pipe and the compressed gas from the compression element section A horizontal rotary compressor characterized in that the shortest distance is smaller than the inner diameter of the discharge pipe.