JPH0532598B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a horizontal scroll compressor.

[Prior Art] Conventionally, a fixed scroll member having a spiral body fixed to one side of a plate body and a movable scroll member having a spiral body fixed to one side of the plate body were conventionally used to form a fluid pocket between them. In combination, an annular boss is formed on the opposite surface of the plate of the movable scroll member, a first radial bearing is fixed in the annular boss, and rotatably supported by the casing via a second radial bearing. A drive pin is provided eccentrically at one end of the main shaft, the drive pin is rotatably supported by the first radial bearing, a rotor of the electric motor housed in the casing is fixed around the main shaft, and the rotation A scroll compressor is known in which the movable scroll member is caused to move in a circular orbit by the rotation of the child, thereby moving the fluid pocket (see Japanese Patent Laid-Open No. 61-87994). Since this type of scroll compressor is installed with the main shaft horizontal, it is generally called a horizontal scroll compressor.

In conventional horizontal scroll compressors, lubricating oil is supplied to the bearings by sucking up the lubricating oil accumulated in the lower part of the casing with an oil supply pump and supplying it to the necessary locations.

[Problems to be Solved by the Invention] However, since this type of oil supply pump is constructed from a combination of a plurality of parts, there is a high risk of failure occurring. Moreover, since it requires a plurality of parts, it is also disadvantageous in terms of cost.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a horizontal scroll compressor in which lubricating oil is reliably supplied to a bearing portion with a structure that has a small number of parts and a low risk of failure.

[Means for Solving the Problems] According to the present invention, a fixed scroll member having a spiral wound body fixed to one surface of a plate and a movable scroll member having a spiral wound body fixed to one surface of a plate are combined. horizontal scroll compression, which are combined to form a fluid pocket therebetween and housed inside a casing, and the fluid pocket is moved by driving the movable scroll member about the horizontal axis relative to the fixed scroll member; On the machine,
An intermediate plate is provided that substantially partitions the inside of the casing into first and second suction chambers in the horizontal axis direction, the fixed and movable scroll members are disposed in the second suction chamber, and the casing has the Providing a refrigerant gas introduction part for introducing refrigerant gas into the first suction chamber,
A main suction system is formed through a second radial bearing disposed on the intermediate plate, so that lubricating oil is collected in the first suction chamber, and the first suction system is formed in the lower part of the intermediate plate. A refueling hole is formed whose end on the second suction chamber side is located higher than the end on the side of the chamber, and the first
and the second suction chamber, the lubricating oil in the first suction chamber is pushed out through the oil supply hole into the second suction chamber and supplied to each sliding part. A scroll compressor is obtained.

[Operation] According to this horizontal scroll compressor, the refrigerant gas contains lubricating oil and is introduced into the first suction chamber in the casing through the refrigerant gas introduction section. Since the pressure in the second suction chamber is slightly lower than that in the first suction chamber, the lubricating oil accumulated in the first suction chamber is pushed out to the second suction chamber through the oil supply hole in the intermediate plate, and each It is supplied to sliding parts and performs a lubricating effect.

[Embodiment] FIG. 1 shows a horizontal scroll compressor according to an embodiment of the invention. This scroll compressor includes a casing 1. A fixed scroll member 2 is fixed to one end inside the casing 1. A movable scroll member 3 is combined with the fixed scroll member 2. The combination of the fixed scroll member 2 and the movable scroll member 3 is herein referred to as a compression mechanism. A fluid pocket 4 for compressing refrigerant gas is formed between the fixed scroll member 2 and the movable scroll member 3. Note that both the fixed and movable scroll members 2 and 3 have a spiral body fixed to one surface of a plate body.

An annular boss 6 is formed on the opposite surface of the plate of the movable scroll member 3. A first radial bearing 7 is fixed in the annular boss 6.
Further, a rotation prevention mechanism is provided on the outside of the annular boss 6 in order to prevent rotation of the movable scroll member 3 with respect to the casing 1.

The casing 1 further accommodates an intermediate plate 8, an end plate 9, and an electric motor 11. The intermediate plate 8 and the end plate 9 are fixed to the casing 1 and rotatably support both ends of the main shaft 12 via second and third radial bearings 13 and 14. As a result, the interior of the casing 1 is substantially divided by the intermediate plate 8 into a motor 11 side portion and a compressor side structure portion. The electric motor 11 includes a stator 16 fixed between the intermediate plate 8 and the end plate 9, and a rotor 17 inserted into the stator 16 and fixed around the main shaft 12.

An eccentric pin 18 is integrally formed at one end of the main shaft 12. A bush 19 is rotatably inserted inside the first radial bearing 7. The pin 18 is rotatably inserted into an eccentric hole in the bush 19. The pin 18 and the bush 19 are collectively regarded as a drive pin here.
In this way, the movable scroll member 3 performs circular orbital motion without rotating as the electric motor 11 rotates. As a result, the fluid pocket 4 moves and compresses the refrigerant gas.

Further, the main shaft 12 is formed with a first hole 21 extending in the axial direction from the other end surface toward one end, and a plurality of second holes 22 extending from the surface near the one end until reaching the first hole 21. ing. second hole 22
opens into the first suction chamber 23 between the electric motor 11, the intermediate plate 8 and the second radial bearing 13.

The first hole 21 also has a pore 2 passing through the pin 18.
4 into the annular boss 6. That is, the pore 24 extends between the deep part of the first hole 21 and the tip end surface of the pin 18 and opens into the annular boss 6 .

A suction pipe 26 serving as a refrigerant gas introduction section is attached to the casing 1 on the extended axis of the main shaft 12 so as to pass therethrough. That is, the opening inside the casing 1 of the suction pipe 26 faces the other end of the first hole 21 .

The scroll compressor is inserted into a refrigeration circuit and circulates refrigerant gas through the refrigeration circuit. In that case, the refrigerant gas contains lubricating oil to lubricate the operation of the scroll compressor. Hereinafter, refrigerant gas containing lubricating oil will also be simply referred to as refrigerant gas.

Refrigerant gas is sucked into the casing 1 through the suction pipe 26 and enters the first hole 21 . Most of the refrigerant gas that has entered the first hole 21 is transferred to the second hole 2.
2 into the first suction chamber 23 and, after passing through the second radial bearing 13 and lubricating it, reaches the second suction chamber 27 . First suction chamber 23
Lubricating oil 31 is collected at the bottom of the . This lubricating oil is supplied to the second suction chamber through the diagonal oil supply hole 28 formed at the bottom of the intermediate plate 8 due to the slight pressure difference generated by the gas flow between the first and second suction chambers 23 and 27. It flows out into chamber 27. Thus the second suction chamber 2
The lubricating oil flowing into 7 is supplied to each sliding part and performs a lubricating action.

On the other hand, the remaining refrigerant gas in the second hole 22 is
4 into the inner space of the annular boss 6 and, after passing through the first radial bearing 7 and lubricating it, reaches the second suction chamber 27 . In this way, the refrigerant gas is transferred to the first and second radial bearings 7, 13.
After being lubricated, it collects in the second suction chamber 27.

The refrigerant gas in the second suction chamber 27 is further drawn into the fluid pocket 4 and compressed. The compressed refrigerant gas is discharged through a discharge pipe 29 attached to the casing 1.
flows out through. It goes without saying that the refrigerant gas that has flowed out returns to the suction pipe 26 through each component of the refrigeration circuit.

In addition, in order to prevent refrigerant gas containing oil accumulated in the first suction chamber 23 during operation stoppage from flowing into the second suction chamber 27 and causing liquid compression when restarting operation,
The outlet of the oil supply hole 28 is located above the liquid level of the lubricating oil when the vehicle is stopped.

[Effects of the Invention] As explained above, according to the present invention, lubricating oil can be reliably supplied to the required parts without requiring a special oil supply pump, so a horizontal scroll with a small number of parts and a low risk of failure can be achieved. We can provide compressor.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a horizontal scroll compressor according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Casing, 2... Fixed scroll member, 3... Movable scroll member, 4... Fluid pocket, 6... Annular boss, 7... First radial bearing, 8... Intermediate plate, 11... electric motor, 1
2...Main shaft, 13...Second radial bearing, 16...Stator, 17...Rotor, 18...
Pin, 19...button, 21...first hole, 2
2... Second hole, 23... First suction chamber, 24...
... Pore, 26 ... Suction pipe, 27 ... Second suction chamber, 28 ... Oil supply hole, 29 ... Discharge pipe.

Claims (1)

[Scope of Claims] 1. A fixed scroll member having a spiral wound body fixed to one surface of a plate and a movable scroll member having a spiral wound body fixed to one surface of the plate so as to form a fluid pocket between them. In a horizontal scroll compressor, the movable scroll member is housed in a casing in combination, and the fluid pocket is moved by driving the movable scroll member relative to the fixed scroll member about the horizontal axis. An intermediate plate is provided that substantially partitions the first and second suction chambers in the center direction, the fixed and movable scroll members are disposed in the second suction chamber, and the casing is provided with a refrigerant in the first suction chamber. A refrigerant gas introduction section for introducing gas is provided, and a main suction path is formed via a second radial bearing disposed on the intermediate plate, so that lubricating oil accumulates in the first suction chamber, At the bottom of the intermediate plate is the first
A refueling hole is formed whose end on the second suction chamber side is higher than the end on the suction chamber side, and the first and second suctions are generated by the flow of gas in the main suction system. A horizontal scroll compressor, characterized in that the lubricating oil in the first suction chamber is pushed out to the second suction chamber and supplied to each sliding part by a pressure difference between the chambers. 2. The horizontal scroll according to claim 1, wherein the end of the oil supply hole on the second suction chamber side is located above the liquid level of the lubricating oil in the first suction chamber when the operation is stopped. compressor.