JPH09177688A - Hermetic compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an air gap of a motor of a compressor to be measured easily while enabling the contact with the oil of an oil reservoir in the bottom part of a suction gas to be prevented, and also to prevent the dilution of oil caused by the return liquid. SOLUTION: A compartment member 6 which comparts a lower space 14 of a compression machine motor 4 to a bottom oil reservoir is provided in a closed casing 1. A gauge insertion hole 63 opposite to an air gap 45 of the compression machine motor 4 and a cock body 64 reducing the opening area of the gauge insertion hole 63 are provided in the compartment member 6. Then, when the air gap 45 is measured, it can be measured easily by inserting a gauge from the gauge insertion hole 63, and after the measurement, the opening area of the gauge insertion hole 63 is decreased by the cock body 64, thereby restraining the suction gas to inflow into the bottom oil reservoir 13 to prevent the disturbance of the oil surface of the bottom oil reservoir 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic compressor used as a compressor of a refrigeration system.

[0002]

2. Description of the Related Art Conventionally, a compression element and a compressor motor are housed in a closed casing, and a refrigerant sucked from a suction pipe connected to the casing is provided below the compressor motor in an air gap of the compressor motor. While the lower space leading to the bottom is formed to cool the compressor motor with the intake refrigerant, a partitioning member for partitioning the lower space from the casing bottom oil sump is provided to prevent contact of suction gas with the bottom oil sump. For example, Japanese Patent Application Laid-Open No. 62-135692 discloses that the return liquid that flows in from the suction pipe is stored in the partition member to prevent the oil from being diluted with the liquid refrigerant.

That is, as shown in FIG. 4, a conventional hermetic compressor having a partitioning member for partitioning the space below the compressor motor and the oil reservoir at the bottom of the casing has a compression element B at the upper inside of the hermetically sealed casing A. , A compressor motor C is disposed at the bottom, and a compressor motor C is provided below the compressor motor C.
A partitioning member F having a bearing portion E that supports the drive shaft D of the compressor is disposed, and by this partitioning member F, the refrigerant sucked under the compressor motor C from a suction pipe G connected to the casing A is disposed. , A lower space J which guides the compressor motor C to the lower part and allows the air gap H formed between the rotor C1 and the stator C2 of the compressor motor C to be introduced into the compression element B, and the casing bottom oil. It is partitioned into a reservoir K to prevent the suction gas introduced into the lower space J from contacting the bottom oil reservoir K and to prevent the oil surface from being disturbed by the stirring of the suction gas accompanying the rotation of the rotor C1. By arranging the partition member F in a transverse manner on the inner surface of the casing A,
The return liquid flowing from the suction pipe G is also stored so that the bottom oil sump is prevented from being diluted with the liquid refrigerant.

[0004]

However, when the air gap H in the compressor motor C is measured using, for example, a gauge (thin plate), the compressor motor C is usually used.
The gauge is inserted from the lower side for measurement. However, when the partition member F is disposed in the casing A as described above, the compression element B, the compression element B, and the compression element B are compressed in the casing A before the measurement of the air gap H. Since the machine motor C and the partition member F are assembled, the partition member F covers the lower part of the compressor motor when measuring the air gap H, and the partition member F interferes with the measurement. was there.

In order to measure the air gap H even with the partition member F provided, it is conceivable to form a gauge insertion hole for inserting a gauge in the partition member F. The hole must be a large hole into which a gauge can be inserted, and a plurality of holes must be provided to measure at a plurality of points at once. Flows into the bottom oil sump K and gas is mixed into the oil, and also does not function as the liquid reservoir of the partition member F, and the return liquid flows into the bottom oil sump K from the gauge insertion hole. The oil in the bottom oil sump is diluted and the lubrication performance deteriorates.

The present invention was invented to solve the above problems, and an object thereof is to prevent the intake gas from coming into contact with the oil in the bottom oil sump, while easily measuring the air gap of a compressor motor. Another object of the present invention is to provide a hermetic compressor that can prevent the oil from being diluted with the return liquid.

[0007]

According to the first aspect of the present invention,
Inside the closed casing 1, there is provided a partition member 6 for partitioning the lower space 14 of the compressor motor 4 into the bottom oil sump 13,
The partition member 6 is provided with an air gap 45 of the compressor motor 4.
And the gauge insertion hole 63 facing the
The plug 64 is provided to reduce the opening area.

Here, to reduce the opening area of the gauge insertion hole 63 means to completely close the gauge insertion hole 63.

The plug 64 can be provided by fitting the plug 64 into the gauge insertion hole 63. If the plug 64 is not fitted, for example, a reed valve is used as the gauge insertion hole 63. It can be achieved by mounting the reed valve in advance at a position opposite to each other so that the reed valve can be opened when measuring the air gap.

According to the first aspect of the present invention, with the above configuration, when the air gap 45 is measured, the gauge can be easily inserted by inserting the gauge from the gauge insertion hole 63. By reducing the opening area with the plug 64, it is possible to prevent the suction gas from flowing into the bottom oil sump 13 and prevent the bottom oil sump 13 from being disturbed.

According to a second aspect of the present invention, in addition to the first aspect of the invention, the gauge insertion hole 63 is provided in the air gap 45.
A plurality of them are provided along the circumference of.

Here, each gauge insertion hole 63 has a plug 64.
Therefore, it is not necessary to completely block all of them, and it is possible to use a plug body 64 having an opening to such an extent that the inflow of suction gas into the bottom oil sump 13 can be suppressed. The bottom oil sump 13 of the intake gas.
You may make it open so that the inflow to may be suppressed.

According to the second aspect of the invention, since the gauges can be inserted at a time from the plurality of gauge insertion holes 63 with the above configuration, the air gap 45 can be measured better and surely. .

According to a third aspect of the present invention, in the first or second aspect of the invention, an oil return hole 68 that penetrates the partition member 6 and connects the lower space 14 of the compressor motor 4 and the bottom oil sump 13 to each other. Is provided.

The oil return hole 68 can be formed in the partition member 6 separately from the gauge insertion hole 63.

According to the third aspect of the invention, the lower space 14 formed by the partition member 6 has the above structure.
Further, even if the oil return after lubrication is accumulated, it can be appropriately returned to the bottom oil sump 13 from the oil return hole 68, so that the oil level of the bottom oil sump 13 can be prevented from lowering.

According to a fourth aspect of the invention, the oil return hole 68 is formed in the plug body 64 in the third aspect of the invention.

When a plurality of gauge insertion holes 63 are provided, there are cases where the oil return holes 68 are formed in all the plugs 64 and cases where they are formed in some of the plugs 64.

According to the fourth aspect of the present invention, with the above configuration, the oil return hole 68 can be formed by using the plug 64, so that it is not necessary to separately drill the partition member 6, and the partition member 6 When an oil return hole is formed in the hole, the oil return amount, that is, the size of the hole must be set according to the capacity of the compressor, which complicates the hole processing operation. When the oil return hole 68 is formed in, the partition member 6 can be made common by forming a plurality of types of plugs 64 having different hole sizes.

According to a fifth aspect of the invention, in the fourth aspect of the invention, the plug 64 is fitted in the gauge insertion hole 63 with a spacer 67 interposed.

According to the fifth aspect of the present invention, with the above configuration, the passage length of the oil return hole 68 can be easily adjusted by changing the thickness of the spacer 67 without changing the thickness of the partition member 6. Oil return hole 68 while being able to
The oil can be returned with a small amount of flow of the return liquid refrigerant from the oil return hole 68 by giving an appropriate resistance to the oil.

According to a sixth aspect of the present invention, in the first to fifth aspects of the invention, the opening 81 of the suction pipe 8 is communicated with the lower space 14 of the compressor motor 4 and the partition member 6 is sucked. This is the liquid reservoir for storing the return liquid from the pipe 8.

When the partition member 6 is used to store the liquid, the partition member 6 may be formed into a plate-like shape that is fixed to the entire circumference of the casing 1 so that the return liquid refrigerant is pooled on the partition member 6. Alternatively, the partition member 6 may have a bottomed tubular shape, and the return liquid refrigerant may be stored in the tubular portion.

According to the sixth aspect of the present invention, with the above construction, the return liquid from the suction pipe 8 flows into the bottom oil sump 13 while preventing the oil surface of the bottom oil sump 13 from being disturbed by the suction gas. It is also possible to prevent the oil from being diluted by the return liquid of the bottom oil sump 13 by suppressing the above.

According to a seventh aspect of the invention, in the first to sixth aspects of the invention, the partition member 6 is fixed to the stator 41 of the compressor motor 4.

The partition member 6 can be fixed to the stator 41 of the compressor motor 4 by welding or press fitting.

In the invention according to claim 7, since the partition member 6 and the stator 41 are integrated, the gauge insertion hole 6 is formed.
3 and the air gap 45 can be easily aligned.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a hermetic compressor according to the present invention will be described below with reference to FIGS. The embodiment is a scroll-type hermetic compressor, in which a fixed scroll 21 is provided above an inside of an airtight hermetic casing 1.
A compressor element 4 composed of a movable scroll 22 and a movable scroll 22 is supported via an upper housing 3, and a compressor motor 4 comprising a stator 41 and a rotor 42 below the compression element 2.
Is arranged.

The compressor motor 4 is fixed to the upper housing 3 by bolts 31, the upper portion of the drive shaft 5 of the compressor motor 4 is supported by a bearing 32 of the upper housing 3, and the drive shaft 5 of the drive shaft 5 is also supported. The lower portion is supported by the bearing 61 of the partition member 6 that fixes the stator 41.

Further, the closed casing 1 is partitioned by the fixed scroll 21 into a discharge chamber 11 above the fixed scroll 21 and a low-pressure side chamber 12 below the fixed scroll 21, and the fixed scroll 21 is attached to the discharge chamber 11. The discharge port 23 and the external discharge pipe 7 are opened, while the suction pipe 8 is opened in the low pressure side chamber 12.

The upper portion of the drive shaft 5 is connected to the movable scroll 22, and the movable scroll 22 is revolved with respect to the fixed scroll 21 by the rotational drive of the drive shaft 5 by the compressor motor 4. The refrigerant in the low-pressure side chamber 12 is introduced into the compression chamber between the fixed scroll 21 and the movable scroll 22 to be compressed and discharged from the discharge port 23 into the discharge chamber 11.

An oil supply passage 51 extending in the axial direction is formed inside the drive shaft 5, and the oil supply passage 51 is formed.
An oil pump 52 is attached to the lower portion of the casing 1, the oil pump 52 is exposed to the bottom oil sump 13 provided at the bottom of the casing 1, and the lubricating oil pumped up from the bottom oil sump 13 via the oil supply passage 51 is The drive shaft 5 of each bearing 32, 61, etc.
It is designed to lubricate the sliding parts of.

Further, the partitioning member 6 has a bottomed tubular shape, and the partitioning member 6 is arranged such that the inner peripheral surface of the tubular portion of the partitioning member 6 is in close contact with the outer peripheral portion of the stator 41 of the compressor motor 4. Is fixed to the stator 41 by press fitting or the like, and a lower space 14 of the compressor motor 4 in the low pressure side chamber 12 is formed between the lower part of the compressor motor 4 and the partition member 6, and the lower space 14 Is partitioned from the bottom oil sump 13 by the partition member 6.

Further, a concave portion 62 whose upper end is opened is formed in a part of the inner peripheral side of the cylindrical portion of the dividing member 6, and when the dividing member 6 is fixed to the stator 41, the concave portion 62 is formed. A partition member 6 is formed so as to communicate with the lower space 14, and the suction pipe 8 penetrates the casing 1.
The opening 81 of the suction pipe 8 communicates with the lower space 14 and the low-pressure side chamber 12 above the compressor motor 4 by opening the opening 62 in the concave portion 62 of the refrigerant. It guides from the recess 62 to the lower space 14 and the low-pressure side chamber 12 above the compressor motor 4, and collects the return liquid from the suction pipe 8 inside the bottomed tubular partition member 6. This partition member 6 serves as a liquid reservoir for storing the return liquid from the suction pipe 8, and
It is arranged to prevent the oil surface of the bottom oil sump 13 from being disturbed by the suction gas.

As shown in FIG. 2, three core cut portions 43 are formed in the stator 41, and when the partition member 6 is fixed to the stator 41 by press fitting or the like, the core cut portions 43 are , Stator 41 and partition member 6
Is formed between the lower space 14 and the low-pressure side chamber 12 above the compressor motor 4, and the refrigerant gas introduced into the lower space 14 is connected to each of the communication passages 44. , While passing the air gap 45 formed between the stator 41 and the rotor 42, the suction gas is guided to the upper side of the motor 4 while cooling the compressor motor 4 with the suction gas. I have to.

In the present embodiment, the partition member 6 has a cylindrical shape with a bottom. However, the return liquid refrigerant may be accumulated on the partition member 6 in the form of a plate that is fixed over the entire circumference of the casing 1. Good.

In the scroll type hermetic compressor described above, the compressor motor 4 at the bottom of the partition member 6 is used.
A gauge insertion hole 63 for inserting a gauge for measuring the air gap 45 is formed at a position facing the air gap 45, and the plug for reducing the opening area of the gauge insertion hole 63 is formed in the gauge insertion hole 63. The body 64 is detachably attached, and a plurality of gauge insertion holes 63 are provided along the circumference of the air gap 45.

Further, as shown in FIG. 1, a female screw portion 65 is formed in the gauge insertion hole 63 formed in the partition member 6, and the plug body 64 is screwed into the female screw portion 65. It is formed by a bolt having a male screw portion 66, and after the air gap 45 is measured, the plug body 64 is screwed into the gauge insertion hole 63 via the spacer 67.

Further, all the plugs 64 are formed with oil return holes 68 which penetrate the partition member 6 and connect the lower space 14 of the compressor motor 4 to the bottom oil sump 13. 68 is capable of returning oil while suppressing the inflow of suction gas into the bottom oil sump 13, and the return liquid refrigerant flowing from the suction pipe 8 is passed through the oil return hole 68 to the bottom oil sump 1
When flowing into 3, the flow passage area or the flow passage length is set such that the concentration in the bottom oil sump 13 does not reach the limit oil concentration after a predetermined time (for example, 10 minutes after the liquid returns). Thus, the passage length is set to a desired length depending on the thickness of the spacer 67.

Although the oil return holes 68 are formed in all the gauge insertion holes 63 in this embodiment, a plurality of the plugs 6 are provided.
The oil return hole 68 may not be formed in a part of 4 and the gauge insertion hole 63 may be completely closed.

The oil return hole 68 may be formed in the partition member 6 separately from the gauge insertion hole 63, and the gauge insertion hole 63 may be completely closed by the plug 64. .

Further, the plug 64 may be fitted in the gauge insertion hole 63 as in the present embodiment,
A non-fitting one, for example, a reed valve may be preliminarily attached to the top surface of the bottom of the partition member 6 at a position facing the gauge insertion hole 63 so that the reed valve can be opened when measuring the air gap.

As described above, in this embodiment, the partition member 6 has the gauge insertion hole 63 facing the air gap 45 of the compressor motor 4 and the plug 64 for reducing the opening area of the gauge insertion hole 63. Since the air gap 4 is provided,
5 can be easily measured by inserting the gauge from the gauge insertion hole 63, but after the measurement, the opening area of the gauge insertion hole 63 is reduced by the plug 64 so that the bottom oil sump 13 It is possible to prevent the oil from disturbing the oil surface of the bottom oil sump 13 by suppressing the inflow to the bottom oil sump 13.

Further, since the plurality of gauge insertion holes 63 are provided along the circumference of the air gap 45, it is possible to insert the gauges from the plurality of gauge insertion holes 63 at a time. The measurement can be performed better and surely.

Further, since the plug 64 is provided with the oil return hole 68 which penetrates the partition member 6 and connects the lower space 14 of the compressor motor 4 and the bottom oil sump 13, the partition member 6 is formed. Even if the oil return after lubrication collects in the lower space 14, the oil can be returned appropriately to the bottom oil sump 13 from the oil return hole 68, so that the lowering of the oil level of the bottom oil sump 13 can be prevented. The oil return hole 6 can be formed by using the plug 64.
8 can be formed, it is not necessary to separately drill holes in the partition member 6, and a plurality of types of plugs 64 having different hole sizes can be formed to form an oil return hole in the partition member 6. In comparison, the oil return amount, that is, the size of the hole can be easily set according to the capacity of the compressor, and the partition member 6 can be shared.

Further, since the plug 64 is fitted into the gauge insertion hole 63 with the spacer 67 interposed, the spacer 67 can be fitted without changing the thickness of the partition member 6.
The passage length of the oil return hole 68 can be easily adjusted by simply changing the thickness of the oil return hole 68, and the oil return hole 68 is provided with an appropriate resistance so that the liquid refrigerant returned from the oil return hole 68 The amount of oil flowing down can be reduced and oil can be returned.

The lower space 14 of the compressor motor 4
The opening 81 of the suction pipe 8 is communicated with the
Is a liquid reservoir for collecting the return liquid from the suction pipe 8,
The partition member 6 can prevent the oil surface of the bottom oil sump 13 from being disturbed by the suction gas, and also suppress the inflow of the return liquid from the suction pipe 8 into the bottom oil sump 13 to prevent the bottom oil sump 13 from flowing. It is also possible to prevent the oil from being diluted by the return liquid.

The stator 41 of the compressor motor 4 is also
Since the partition member 6 is fixed to the above, since the partition member 6 and the stator 41 are integrated, the position of the gauge insertion hole 63 and the air gap 45 can be easily adjusted.

Although the scroll-type hermetic compressor has been described in the above embodiments, the present invention is not limited to the scroll-type compressor but can be applied to other hermetic-type compressors such as a rotary compressor. The present invention can be applied not only to the low-pressure dome type compressor as in the embodiment but also to a high-pressure dome type hermetic compressor.

[0050]

According to the first aspect of the present invention, the gauge is inserted into the partition member 6 for partitioning the lower space 14 and the bottom oil sump 13 of the compressor motor 4 so as to face the air gap 45 of the compressor motor 4. Since the hole 63 and the plug 64 that reduces the opening area of the gauge insertion hole 63 are provided, when the air gap 45 is measured, the gauge can be easily inserted by inserting the gauge from the gauge insertion hole 63. The opening area of the gauge insertion hole 63 can be reduced by the plug 64 to prevent the intake gas from flowing into the bottom oil sump 13 and prevent the bottom oil sump 13 from being disturbed.

According to the second aspect of the present invention, since the plurality of gauge insertion holes 63 are provided along the circumference of the air gap 45, the gauges can be inserted through the plurality of gauge insertion holes 63 at one time. Therefore, the measurement of the air gap 45 can be performed better and surely.

According to the third aspect of the present invention, since the oil return hole 68 that penetrates the partition member 6 and connects the lower space 14 of the compressor motor 4 and the bottom oil reservoir 13 is provided, the partition member 6 forms the oil return hole 68. Even if the oil return after lubrication accumulates in the lower space 14 that is formed, the bottom oil sump 13 is appropriately removed from the oil return hole 68.
Since the oil level in the bottom oil sump 13 can be prevented, the oil level in the bottom oil sump 13 can be prevented from lowering.

According to the invention described in claim 4, the stopper 6
Since the oil return hole 68 is formed in No. 4, the oil return hole 68 can be formed by using the plug body 64, so that it is not necessary to separately drill the partition member 6, and the oil return hole is formed in the partition member 6. When forming, the amount of oil returned depending on the capacity of the compressor,
In other words, the size of the hole must be set, which complicates the hole processing work, but the oil return hole 68 is provided in the plug 64.
In the case of forming, the partition member 6 can be made common by forming a plurality of types of plugs 64 having different hole sizes.

According to the invention of claim 5, the stopper 6
4 is fitted into the gauge insertion hole 63 with the spacer 67 interposed, the passage length of the oil return hole 68 can be changed by changing the thickness of the spacer 67 without changing the thickness of the partition member 6. While the oil return hole 68 can be adjusted easily, the oil return hole 68 can have a proper resistance to reduce the amount of the return liquid refrigerant flowing down from the oil return hole 68 to return the oil.

According to the sixth aspect of the invention, the opening 81 of the suction pipe 8 is communicated with the lower space 14 of the compressor motor 4 and the partition member 6 is a liquid reservoir for collecting the return liquid from the suction pipe 8. Since it is a body, the bottom oil sump 13 due to the intake gas
While preventing the oil surface from being disturbed, the inflow of the return liquid from the suction pipe 8 into the bottom oil sump 13 is also suppressed, and the bottom oil sump 13
It is also possible to prevent the oil from being diluted by the return liquid.

According to the invention of claim 7, since the partition member 6 is fixed to the stator 41 of the compressor motor 4,
Since the partition member 6 and the stator 41 are integrated, the position of the gauge insertion hole 63 and the air gap 45 can be easily adjusted.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an essential part showing an embodiment of a hermetic compressor of the present invention.

FIG. 2 is a top view of the partition member showing a positional relationship between an arrangement state of the partition member in the closed casing and an air gap of the compressor motor in the embodiment.

FIG. 3 is a 120 ° vertical sectional view of the hermetic compressor corresponding to the line AA in FIG. 2 of the same embodiment.

FIG. 4 is a vertical sectional view of a conventional hermetic compressor.

[Explanation of symbols]

 1 ... Casing 6 ... Partitioning member 13 ... Bottom oil sump 63 ... Gauge insertion hole 14 ... Lower space 64 ... Plug body 4 ... Compressor motor 67 ... Spacer 41 ... Stator 68 ... Oil return Hole 45 ... Air gap 8 ... Suction pipe 81 ... Opening

Claims (7)

[Claims] 1. A partition member (6) for partitioning a lower space (14) of a compressor motor (4) with respect to a bottom oil sump (13) is provided inside the hermetic casing (1). )
And a gauge insertion hole (63) facing the air gap (45) of the compressor motor (4) and the gauge insertion hole (6).
A hermetic compressor characterized in that a plug (64) for reducing the opening area of 3) is provided. 2. A gauge insertion hole (63) is provided with an air gap (4).
The hermetic compressor according to claim 1, wherein a plurality of the compressors are provided along the circumference of 5). 3. An oil return hole (68) which penetrates the partition member (6) and connects the lower space (14) of the compressor motor (4) and the bottom oil sump (13). Item 2. The hermetic compressor according to item 2. 4. The hermetic compressor according to claim 3, wherein an oil return hole (68) is formed in the plug body (64). 5. The hermetic compressor according to claim 4, wherein the plug (64) is fitted in the gauge insertion hole (63) with a spacer (67) interposed. 6. The lower space (14) of the compressor motor (4) communicates with the opening (81) of the suction pipe (8), and the partition member (6) collects the return liquid from the suction pipe (8). The hermetic compressor according to any one of claims 1 to 5, which is a liquid reservoir for storing. 7. The hermetic compressor according to claim 1, wherein the partition member (6) is fixed to the stator (41) of the compressor motor (4).