JPH11324948A - Hermetic compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a pipeline space while simplifying a route of a connecting pipeline by forming an intake pipe and a discharge pipe in the same direction of a sealed container. SOLUTION: A motor and a compressor part are arranged inside of a hermetic container 1 formed of a container body 1a and a cover body 1b, and a turning scroll 6 engaged with a fixed scroll having a wrap so as to form plural compression chambers and a discharge side space for the compressed gas to be discharged from a discharge port provided in a panel board 4a of the fixed scroll 4, and a motor chamber for housing a motor are partitioned by the panel board 4a. In this case, a high-pressure chamber 17 to be sealed by a partitioning body 16 is formed between a back surface of the panel board 4a surrounding the discharge port and the cover body 1b, and a sealed space in the periphery of the high pressure chamber is formed into a low-pressure chamber 18, and an intake pipe fitting hole 21b is formed in a back surface of the panel board 4a at an upper part of the low-pressure chamber 18. Further, the cover body 1b is provided with an intake pipe insertion hole 21a, and an intake pipe 21 to be inserted into the intake pipe insertion hole 21a from outside and connected too the intake pipe fitting hole 21a is provided, and a discharge pipe insertion hole 22a for inserting and passing from outside to the high-pressure chamber 17 with each other is provided in a side surface of the cover body 1b, and a discharge pipe 22 for communicating outside and the high-pressure chamber 17 with each other is provided.

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 for an air conditioner and the like, and more particularly, to a high-pressure chamber provided between a discharge portion of a fixed scroll and a lid, and the same direction on the side of the lid. And a structure provided with a suction pipe and a discharge pipe.

[0002]

2. Description of the Related Art As shown in FIG. 4, for example, a conventional hermetic compressor is fitted into a cylindrical container body 1a having one side opening and an opening of the container body 1a. Along with the lid 1b sealed by welding a. An electric motor 2 and a compression unit 3 are disposed on the left and right sides in the closed container 1. The compression unit 3 includes a plurality of fixed scrolls 4 having a spiral wrap on a head plate 4 a and a plurality of fixed scrolls 4 engaged with each other. A revolving scroll 6 forming a compression chamber 5, an Oldham ring 7 for preventing the revolving scroll 6 from rotating,
A shaft 10 having a lubricating oil passage 9 penetrating from a left end to a right end, and a shaft 10 having a orbiting drive shaft 6a of the orbiting scroll 6 formed at a lower end thereof to form a crankshaft 8 and orbiting, and a bearing for supporting the crankshaft 8 11 and constitute a hermetic compressor.

[0003] The lubricating oil is sucked from an oil pump 12 for supplying lubricating oil to the sliding portion of the compression unit 3 through the lubricating oil passage 9 and an oil reservoir 13 provided at the bottom of the closed container 1. It comprises an oil suction pipe 14 leading to the oil pump 12.

The inside of the closed vessel 1 is divided into a low pressure side and a high pressure side by a head plate 4a of the fixed scroll 4, and a discharge port provided on the head plate 4a of the fixed scroll 4 at the high pressure side.
This is a discharge chamber 17 'for the compressed gas discharged from 15, and the low-pressure side is a motor chamber 2a. A suction pipe 21 ′ introduced into the closed casing 1 from the outside of the lid 1 b from the outside is connected to the compression chamber 5 of the compression section 3 from the back of the end plate 4 a of the fixed scroll 4. On the other hand, a discharge pipe 22 'is led out from the side of the closed vessel 1 opposite to the suction pipe 21'. Between the discharge chamber 17 'and the motor chamber 2a, a gas passage 19 for passing a compressed gas passing through the fixed scroll 4 and the bearing 11 and an oil passage 20 for returning lubricating oil are provided. I have.

In the above configuration, the gas sucked in from the suction pipe 21 'is compressed in the compression chamber 5, and is discharged from the discharge port 15 to the discharge chamber 1
It is discharged to 7 'and discharged to the outside from a discharge pipe 22' via a discharge passage (not shown). However, the suction pipe 21 '
When the discharge pipe 22 'and the discharge pipe 22' are formed in opposite directions, there is a problem that the path of the connection pipe becomes complicated and the pipe space is increased.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a suction pipe and a discharge pipe formed on the same side of a closed container to simplify a connection pipe path.
It is an object of the present invention to provide a hermetic compressor capable of reducing a piping space.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. An electric motor and a compression unit driven by the electric motor are arranged on the left and right sides in a closed container, and the compression unit is provided with a head plate. A fixed scroll having a spiral wrap on
A orbiting scroll that meshes with the fixed scroll to form a plurality of compression chambers, a discharge-side space for compressed gas discharged from a discharge port provided in a head plate of the fixed scroll, and a motor chamber that houses the electric motor. Is separated by the end plate of the fixed scroll, and the lubricating oil at the bottom of the closed container is sucked up by the supply mechanism and supplied to the sliding portion. And, between the side surfaces of the closed container opposed to the rear surface of the head plate, a partition body, a high-pressure chamber is formed inside the partition body, and a low-pressure chamber is formed outside the partition body. An oil passage communicating with a motor chamber is provided, a suction pipe mounting hole is formed on the rear surface of the end plate of the fixed scroll above the low-pressure chamber, and the closed vessel opposed to the suction pipe mounting hole is formed. A suction pipe insertion hole is provided on a side surface of the closed vessel, and the suction pipe is inserted from the outside of the closed vessel through the suction pipe insertion hole, and a suction pipe connected to the suction pipe mounting hole is provided. And a discharge pipe insertion hole inserted from the outside into the high pressure chamber, and a discharge pipe communicating the outside of the sealed container and the high pressure chamber is formed in the discharge pipe insertion hole.

Further, the partition body is formed in a cylindrical shape.

Further, the diameter of the partition body on the side of the lid body is made larger than the diameter of the partition body on the rear side of the end plate.

[0010] Further, the distal end of the partition is fixed to the lid by welding.

A projection is formed on the back surface of the end plate surrounding the discharge port in the discharge side space, and the opening end of the partition is fitted around the projection.

Further, a seal member made of an O-ring is provided on the outer periphery of the convex portion.

[0013] The distal end of the opening of the partition is fixed to the outer periphery of the projection by press-fitting.

Further, the suction pipe and the discharge pipe are formed in parallel in the horizontal direction.

The bottom of the discharge side space is formed as an oil reservoir.

[0016]

Embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a side sectional view of a hermetic compressor showing an embodiment of the present invention, FIG. 2 is an enlarged sectional view of a main part of the present invention, and FIG. 3 is a sectional view of a part bb in FIG. In the figure, a cylindrical container body 1a opening on one side, and the container body
The lid 1b is fitted into the opening 1a and sealed along the fitting by welding a to form the closed container 1.
An electric motor 2 and a compression unit 3 are arranged on the left and right in the closed container 1,
The compression unit 3 includes a fixed scroll 4 having a spiral wrap on a head plate 4a, a revolving scroll 6 meshing with the fixed scroll 4 to form a plurality of compression chambers 5, and a rotation of the revolving scroll 6. Oldham ring 7 to prevent
A shaft 10 having a lubricating oil supply passage 9 extending from the left end to the right end, and a crank shaft 8 formed at the lower end of the orbiting drive shaft 6a of the orbiting scroll 6 for orbital driving; The bearing 11 forms a hermetic compressor.

The lubricating oil is sucked from an oil pump 12 for supplying the lubricating oil to the sliding portion of the compression unit 3 through the lubricating oil passage 9 and an oil reservoir 13 provided at the bottom of the closed container 1. It comprises an oil suction pipe 14 leading to the oil pump 12.

The interior of the closed container 1 is moved by the end plate 4a of the fixed scroll 4 to the space on the discharge side of the compressed gas discharged from the discharge port 15 provided on the back surface of the end plate 4a, and the motor chamber 2a for accommodating the electric motor 2. The configuration is divided into:
A high-pressure chamber 17 sealed by a cylindrical partition body 16 is formed between the back surface of the end plate 4a surrounding the discharge port 15 of the discharge side space and the lid 1b, and a closed space around the high-pressure chamber 17 is reduced in pressure. A chamber 18 and a gas passage 19 communicating the low-pressure chamber 18 and the motor chamber 2a are provided at an upper part of the compression part, and a low-pressure chamber 18 and the motor chamber 2a are communicated at a lower part of the compression part. An oil passage 20 through which lubricating oil passes is provided.

A suction pipe insertion hole 21a for inserting a suction pipe 21 from the outside of the closed vessel 1 is provided at an upper portion of the side surface of the lid 1b, and a suction pipe is provided on the back of the end plate 4a of the fixed scroll 4.
A suction pipe mounting hole 21b for connecting the suction pipe 21 is formed. On the other hand, a discharge pipe insertion hole 22a for inserting a discharge pipe 22 for discharging compressed gas from the high-pressure chamber 17 is provided at the center of the side surface of the lid 1b. The suction pipe 21 and the discharge pipe 22 are formed in parallel in the horizontal direction.

The diameter of the cylindrical partition 16 on the side of the lid 1b is formed larger than the diameter of the rear side of the end plate 1b.
The distal end is fixed to the lid 1b by welding. Further, a convex portion 4b is provided on the back surface of the end plate 4a surrounding the discharge port 15.
A groove 4c is provided on the outer periphery of the convex portion 4b, a sealing material 23 made of an O-ring is fitted into the groove 4c, and the opening end of the partition body 16 is fixed to the convex portion 4b by press-fitting. It has become.

In the above configuration, a cylindrical partition body is provided between the back surface of the end plate 4a surrounding the discharge port 15 of the fixed scroll 4 and the lid 1b.
16 is provided, the lid 1b side is fixed by welding, and the end plate 4a side is fitted with the sealing material 23 in the convex portion 4b and fixed by press-fitting, thereby forming a sealed high-pressure chamber 17, and covering the compressed gas with the lid. body
The discharge can be performed from the discharge pipe 22 on the 1b side, while the outer peripheral space of the high-pressure chamber 17 is defined as the low-pressure chamber 18 and the suction pipe 21 is connected from the lid 1b side to the compression chamber 5 through the low-pressure chamber 18 to discharge from the same direction. The pipe 22 and the suction pipe 21 can be connected. As a result,
The path of the connection pipe can be simplified, the pipe space can be reduced, and the pressure of the high-pressure chamber 17 is applied to the fixed scroll 4 to prevent the fixed scroll 4 from being deformed. By using the oil reservoir 13, a hermetic-type compressor capable of increasing the amount of sealed oil is obtained.

[0022]

As described above, according to the present invention, by arranging the discharge pipe and the suction pipe in the same direction from the same side of the closed container, the path of the connection pipe is simplified and the piping space is reduced. A sealed type that can prevent deformation of the fixed scroll by applying the pressure of the high pressure chamber to the fixed scroll, and increase the amount of sealed oil by using an oil reservoir at the bottom of the low pressure chamber. It becomes a compressor.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a hermetic compressor showing one embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part showing an embodiment of the present invention.

FIG. 3 is an enlarged sectional view of a part bb in FIG. 2 showing one embodiment of the present invention.

FIG. 4 is a longitudinal sectional view of a hermetic compressor showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Closed container 1a Container body 1b Lid 2 Electric motor 2a Motor room 3 Compression part 4 Fixed scroll 4a End plate 5 Compression chamber 6 Orbiting scroll 6a Orbital drive shaft 7 Oldham ring 8 Crankshaft 9 Lubricating oil supply path 10 Shaft 11 Bearing 12 Oil pump 13 Oil reservoir 14 Oil suction pipe 15 Discharge port 16 Partition 17 High pressure chamber 18 Low pressure chamber 19 Gas passage 20 Oil passage 21 Suction pipe 22 Discharge pipe

Claims (9)

[Claims] An electric motor and a compression unit driven by the electric motor are arranged on the left and right sides in a closed container, and the compression unit is engaged with the fixed scroll having a spiral wrap on a head plate and the fixed scroll. The orbiting scroll forming a plurality of compression chambers, the discharge side space of the compressed gas discharged from the discharge port provided in the end plate of the fixed scroll, and the motor chamber accommodating the electric motor are formed by the end plate of the fixed scroll. In the hermetic compressor, the lubricating oil at the bottom of the hermetic container is sucked up by a supply mechanism and supplied to the sliding portion, and the rear face of the mirror plate surrounding the discharge port of the discharge side space is opposed to the rear face of the mirror plate. Between the sides of the closed closed container facing each other,
A high-pressure chamber is formed inside the low-pressure chamber, and a low-pressure chamber is formed outside the low-pressure chamber. An oil passage communicating the low-pressure chamber and the motor chamber is provided below the compression unit. A suction pipe mounting hole is formed on the back surface of the end plate, a suction pipe insertion hole is provided on a side surface of the closed container opposed to the suction pipe mounting hole, and the suction pipe insertion hole is inserted from outside the closed container, and the suction is performed. While providing a suction pipe connected to the pipe mounting hole, a discharge pipe insertion hole is provided on the side surface of the same sealed container as the suction pipe insertion hole from the outside to the high-pressure chamber, and the discharge pipe insertion hole is connected to the outside of the sealed container. A hermetic compressor characterized by having a discharge pipe communicating with the high-pressure chamber. 2. The hermetic compressor according to claim 1, wherein said partition is formed in a cylindrical shape. 3. The hermetic compressor according to claim 1, wherein the diameter of the partition body on the lid side is larger than the diameter on the rear side of the end plate. 4. The hermetic compressor according to claim 1, wherein a front end of said partition is fixed to said lid by welding. 5. A projection is formed on the rear surface of the end plate surrounding the discharge port in the discharge side space, and the tip of the opening of the partition is fitted around the projection. 2 or 3
The hermetic compressor as described. 6. The hermetic compressor according to claim 5, wherein a seal member made of an O-ring is provided on an outer periphery of said convex portion. 7. The hermetic compressor according to claim 1, wherein an end of an opening of the partition is fixed to an outer periphery of the projection by press-fitting. 8. The hermetic compressor according to claim 1, wherein said suction pipe and said discharge pipe are formed in parallel in a horizontal direction. 9. The hermetic compressor according to claim 1, wherein a bottom portion of the discharge side space serves as an oil reservoir.