JPH056038B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a horizontal compressor that is incorporated into a refrigeration device such as a refrigerator or an air conditioner, and in particular,
This relates to a horizontal compressor that aims to ensure a sufficient amount of oil supply.

[Conventional technology]

First, a conventional horizontal compressor will be explained.

FIG. 1 is a longitudinal sectional view showing an example of a conventional horizontal compressor. In FIG. 1, numeral 1 denotes a case that also serves as an oil reservoir, and an electric motor 22 and a compression element 29 are housed within this case 1.

The electric motor 22 has a stator 27 and a rotor 28.
A shaft 4, which will be described later, is fitted into this rotor 28.

The compression element 29 includes a cylinder 2 fixed to the case 1, a shaft 4 having a crank 3 (details will be described later), a roller 7 fitted in the crank 3 and rotating eccentrically along the inside of the cylinder 2, and this roller 7.
a vane 10 that moves reciprocally within the groove 8 of the cylinder 2 with its tip in contact with the spring 9 and the other end pressed by the spring 9; Side plate A5, side plate B6 (details will be described later), which are arranged on both sides and serve as the bearing of the shaft 4 and the side wall of the cylinder 2, and are attached to the cylinder 2, the back surface of the vane 10, the groove 8 of the cylinder 2, the side plate A5, and the side plate B6 and seal parts 1
It consists of a pump chamber 12 surrounded by 1 and 1.

The side plate A5 has a fluid diode type suction port 14 that can suck lubricating oil 13 in the case 1 into the pump chamber 12, and a space A19 (on the pump chamber 12 side) that prevents interference due to movement of the vane 10 The fluidic diode type suction port 14 is
The part that opens to the space A19 side is the small diameter part,
The portion opening into the case 1 on the opposite side is a tapered hole having a large diameter. Further, a fluid diode type discharge port 16 that can discharge lubricating oil 13 from the pump chamber 12 to the oil supply path 15 is bored in the side plate B6. The part that opens on the 12 side is the large diameter part, and the oil feed passage 15 on the opposite side
The part that opens on the side is a small diameter part, which is a tapered hole, and is connected to this small diameter part to create a space B2.
0 is provided to facilitate producing an edge effect on the small diameter hole end face 21.

In this configuration, when the horizontal compressor is operated and the shaft 4 rotates, the roller 7 rotates accordingly, and the vane 10 has its tip abutted against the roller 7 and the other end pressed by the spring 9. The refrigerant reciprocates within the groove 8 of the cylinder 2 while compressing the refrigerant that has flowed in from the refrigerant suction port (not shown) and discharges it from the refrigerant discharge port (not shown).

On the other hand, when the volume of the pump chamber 12 increases due to the reciprocating movement of the vane 10, lubricating oil 13 is sucked in from the fluid diode type suction port 14. At this time, the lubricating oil 13 is also sucked in from the fluid diode type discharge port 16, but while the flow in the fluid diode type suction port 14 is in the forward direction, the flow in the fluid diode type discharge port 16 is in the reverse direction. Therefore, fluid diode type discharge port 1
The flow resistance of 6 is the fluid diode type suction port 14
Most of the lubricating oil is sucked in from the fluid diode type suction port 14.

Further, when the volume of the pump chamber 12 becomes smaller, the lubricating oil 13 is discharged from the fluid diode type discharge port 16 to the oil feed path 15. At this time, the lubricating oil 13 is also discharged from the fluid diode type suction port 14, but in this case, the flow through the fluid diode type discharge port 16 is in the forward direction.
Since the flow in the fluid diode type suction port 14 is a reverse flow, the fluid diode type suction port 1
4 flow resistance is fluid diode type discharge port 16
, and most of the lubricating oil is discharged from the fluidic diode-type discharge port 16. Therefore, most of the lubricating oil discharged from the pump chamber 12 is sent to the oil feed path 15, from where it is sent to the shaft 4.
The oil is sent to a required lubricating part through a shaft hole 17 drilled at one end of the shaft hole 17 and a branch hole 18 branched from the shaft hole 17.

[Problem to be solved by the invention]

However, the conventional horizontal compressor described above has the following drawbacks.

In other words, when this horizontal compressor is installed on a product, the horizontal compressor may tilt in the axial direction due to dimensional tolerances during installation, and the product may be installed tilted in the axial direction. . When the horizontal compressor is tilted in this way, lubricating oil collects at the lower end of the horizontal compressor, and the oil level near the fluid diode suction port 14 decreases relatively. The drawback was that it was exposed above the oil surface and inhaled gas, making refueling impossible. Further, even if the horizontal compressor is installed horizontally, a similar problem occurs in that lubricating oil cannot be refilled even if part of the lubricating oil is discharged during the refrigeration cycle and the oil level drops.

In order to cope with the drop in oil level as described above, it is possible to seal in a large amount of lubricating oil, but if too much lubricating oil is filled in, the oil level will come into contact with the rotor 28 when the horizontal compressor is installed horizontally, and the rotation of this rotor 28 will be reduced. This causes the lubricating oil to scatter, and the scattered lubricating oil is discharged into the refrigeration cycle, resulting in a reduction in the performance of the refrigeration cycle.

An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and provide a horizontal compressor that can be refilled even when the level of lubricating oil stored in a case decreases, and which is easy to manufacture and has a good shape. The object of the present invention is to provide a horizontal compressor equipped with an oil pump that is easy to manage.

[Means to solve the problem]

To achieve the above object, the horizontal compressor of the present invention includes an electric motor in a case that also serves as an oil sump, and a cylinder and a crank connected to the electric motor. A compression element configured by an eccentrically rotating roller, a vane that reciprocates within a groove of the cylinder with its tip abutting the roller and the other end being pushed by a spring, and side plates arranged on both sides of the cylinder is housed. A pump chamber is formed surrounded by the back surface of the vane, the groove of the cylinder, and the side plates, and a suction port that can suck oil in the case and a discharge port that sends oil from the pump chamber to an oil supply path are arranged. In the horizontal compressor, the lubricating oil in the case is pumped to one end of the shaft by a pumping action caused by reciprocating movement of the vanes as the shaft rotates, and a discharge port is provided on one of the side plates. The suction port is formed as a fluid diode type suction port with a large diameter portion at the bottom, and the large diameter portion is directed downward and the large diameter portion is below the oil level in the case. The spring is installed in a spring hole provided in the cylinder, and the spring is placed in a cylinder having a bottom surface and a space where lubricating oil can flow in, and the movement of the spring is restrained by the large diameter part.

[Effect]

A discharge port is provided on one of the side plates, and the suction port is formed as a fluid diode type suction port with a large diameter portion at the bottom, the large diameter portion facing downward, and the large diameter portion facing downward. Since the cylinder is located at the bottom of the case below the oil level and a space where lubricating oil can flow in, it is a horizontal compression system that can be refilled even when the level of lubricating oil stored in the case is low. machine can be provided.

Furthermore, since the spring is mounted in the spring hole provided in the cylinder with its movement restricted by the large diameter portion, contact between the spring and the side wall of the spring hole can be prevented. Furthermore, since the suction port is located below the back surface of the vane and on the inner circumferential side of the spring, suction can be drawn in the direction of movement of the vane, thereby improving the performance of the pump.

〔Example〕

Hereinafter, the present invention will be explained with reference to Examples.

FIG. 2 is a longitudinal sectional view of a horizontal compressor according to an embodiment of the present invention.

In FIG. 2, the same numbers as in FIG. 1 indicate the same parts. In the horizontal compressor of this embodiment, the suction mouth 2 of the compression element 29A
3 (corresponding to the seal part 11 in FIG. 1), the side plate A5A is different from the conventional horizontal compressor shown in FIG. 1, and the other parts are the same.

The suction mouth 23 has a large diameter portion at the bottom thereof, and a fluid diode type suction port 24 (hereinafter simply referred to as suction port) having a small diameter portion having a predetermined diameter that tapers out from there toward the pump chamber 12 side.
and a collar part 26 that can be brought into close contact with the spring hole 25 so that the pump chamber 12 communicates with the outside only through the small diameter part are integrally molded by press working. A predetermined space δ is provided between the large diameter portion and the case 1, and the lubricating oil 13 is fitted into the spring hole 25 so that the lubricating oil 13 can be sucked from this space. This suction mouth 23 also serves as a spring seat.
That is, the spring 9 is mounted near the bottom of the suction mouth 23 so as to be in contact with the outside of the tapered suction port 24, so that the spring 9 does not move in the radial direction.

In this way, since the suction port 24 is formed in the suction mouth 23, there is no need to provide a fluid diode type suction port, which was conventionally provided in the side plate A, in the side plate A5A.

In this embodiment configured in this way, when the horizontal compressor is operated and the shaft 4 rotates, the roller 7 rotates accordingly, and the tip of the vane 10 contacts the roller 7, and the other end is connected by the spring 9. It reciprocates within the groove 8 of the cylinder 2 while being pushed. Vane 1
When the volume of the pump chamber 12 increases due to the reciprocating motion of the pump, lubricating oil is sucked from the suction port 24. At this time, the fluid diode type discharge port 16
(hereinafter simply referred to as the discharge port), lubricating oil is also sucked in, but while the flow in the suction port 24 is in the forward direction, the flow in the discharge port 16 is in the opposite direction. The flow resistance is greater than that of the suction port 24, and most of the lubricating oil is sucked through the suction port 24.

Furthermore, by fitting the suction mouth 23 into the spring hole 25, the following effect of further improving the water supply pump performance is produced. When the vane 10 moves upward, the volume of the pump chamber 12 increases, oil flows in from the suction port 24, and at the same time, the oil flows into the discharge port 1.
Oil also flows in from 6. Oil flowing from the suction port 24 first flows into the inside of the spring 9. On the other hand, oil flowing from the discharge port 16 flows to the outside of the spring 9. Spring 9 inserted into spring hole 25 that constitutes pump chamber 12
In order to minimize the stress, the winding diameter of
Generally, the spring hole 25 is designed to be as large as possible without contacting the wall surface. Therefore,
Most of the volume within the pump chamber 12 is inside the spring 9.

When the volume of the pump chamber 12 starts to increase from its minimum volume, the vane 10 is at its lowest position, the spring 9 is at its lowest position, and the gap between the windings is narrow.

Therefore, the vane begins to rise and the pump chamber 12
When the volume of the pump chamber 12 starts to increase, the volume inside the spring, which occupies most of the volume inside the pump chamber 12, increases and sucks oil directly from the suction port 24. On the other hand, oil that flows backward from the discharge port and enters the pump chamber 12 must pass through the gaps between the windings of the spring 9 and enter the inside of the spring 9, so the resistance when passing through the narrow gaps between the windings is reduced. Yes, it is difficult to backflow from the discharge port.

Therefore, it is easy to absorb oil from the suction port,
Since it is difficult for oil to flow back from the discharge port, the performance as an oil supply pump can be further improved by providing a suction port at the lower end of the spring.

Furthermore, when the volume of the pump chamber 12 becomes smaller, lubricating oil is discharged from the discharge port 16 to the oil feed path 15. At this time, lubricating oil is also discharged from the suction port 24, but in this case, the flow through the discharge port 16 is in the forward direction, while the flow through the suction port 24 is in the opposite direction. The flow resistance of the suction port 24 is greater than the flow resistance of the discharge port 16, and most of the lubricating oil is discharged from the discharge port 16. Therefore, most of the lubricating oil discharged from the pump chamber 12 is sent to the oil feed path 15, and the required lubricating oil is sent through the shaft hole 17 and the branch hole 18.

In this case, even if the lubricating oil level has dropped significantly due to reasons such as the horizontal compressor being tilted in the axial direction, for example, even if the oil level has dropped to the vicinity of the suction mouth 23, the suction Since the suction side of the port 24 opens below the spring hole 25, no gas is sucked in, and stable oil supply can be performed.

The embodiment described above has the following effects.

Since the suction port 24 opens below the spring hole 25, the lubricating oil can be sucked in from the lowest position while securing the space δ that serves as a flow path for sucking the lubricating oil, which significantly reduces the oil level. It is possible to perform stable refueling even if the

By press working, the suction port 24 and the suction mouth 23 having the function of a spring seat can be easily made in one piece, so there is no need to process a fluid diode type suction port on the side plate A as in the past. In addition, an inexpensive horizontal compressor can be provided.

Since the suction mouth 23 is formed by press working, the diameter and edge shape of the small diameter portion of the suction port 24 can be easily controlled, and stable fuel pump performance can be obtained.

In this embodiment, the suction mouth 23 is manufactured by press working, but it is not limited to press working, and may be manufactured by a method such as machining, but according to press working, It has practical advantages in that it is easy to manufacture and the shape of the suction port 24 is also easy to manage.

Further, in this embodiment, the horizontal compressor is of a type in which the cylinder 2 is fixed to the case 1, but the present invention is applicable to other types of horizontal compressors, for example, the side plate is fixed to the case, and the side plate is fixed to the case 1. It can be similarly applied to a type of horizontal compressor with a fixed cylinder.

〔Effect of the invention〕

As described in detail above, according to the present invention, it is possible to provide a horizontal compressor that can be refueled even if the level of lubricating oil stored in the case decreases.

Furthermore, since the movement of the spring is restricted, contact between the spring and the side wall of the spring hole can be prevented. Furthermore, since the suction port is installed below the back surface of the vane and on the inner peripheral side of the spring, suction can be carried out in the direction of movement of the vane, thereby improving the performance of the pump.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an example of a conventional horizontal compressor, and FIG. 2 is a longitudinal sectional view of a horizontal compressor according to an embodiment of the present invention. 1...Case, 2...Cylinder, 3...Crank, 4...Shaft, 5A...Side plate A, 6...Side plate B, 7...Roller, 8...Groove, 9...Spring, 1
0... Vane, 12... Pump chamber, 13... Lubricating oil, 15... Oil feed path, 16... Fluid diode type discharge port, 22... Electric motor, 23... Suction mouth, 24... Fluid diode type Suction port, 25
... Spring hole, 27 ... Stator, 28 ... Rotor, 29A ... Compression element, δ ... Space.

Claims (1)

[Claims] 1. An electric motor in a case that also serves as an oil reservoir, a cylinder, and a roller that is fitted into the crank of a shaft and rotates eccentrically along the inside of the cylinder, and whose tip is in contact with the roller, and which has a crank connected to the cylinder and the electric motor. A compression element configured by a vane whose end is pushed by a spring and reciprocates within the groove of the cylinder, and side plates arranged on both sides of the cylinder is housed, and the compression element includes a back surface of the vane, the groove of the cylinder, and both sides. A pump chamber surrounded by the plate is formed, and a suction port that can suck oil in the case and a discharge port that sends oil from the pump chamber to the oil supply path are arranged. In the horizontal compressor, the lubricating oil in the case is pumped to one end of the shaft by a pump action, and a discharge port is provided on one of the side plates, and the suction port is connected to the bottom of the horizontal compressor. A cylinder position where a fluid diode type suction port is formed with a large diameter part, and the large diameter part faces downward, and a space is provided for the lubricating oil to flow into the bottom surface of the case, where the large diameter part is below the oil level. A horizontal compressor, characterized in that the spring is installed in a spring hole provided in the cylinder, and the spring is restrained in movement by the large diameter portion.