JPS5856394Y2 - Compressor liquid compression prevention device - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement of a liquid compression prevention device for a rotary unit compressor, and one of its purposes is to reduce the number of components and facilitate processing and assembly work. be.

In rotary unit compressors, when refrigerant is compressed into liquid, an abnormally large force is applied to the discharge valve and vanes, accelerating vane wear or, in severe cases, causing damage to the discharge valve and vanes. Liquid compression prevention devices having various configurations have been provided.

However, conventional devices have many constituent elements, are expensive, and have drawbacks such as poor workability during processing and assembly.

The present invention eliminates the drawbacks of the conventional liquid compression prevention devices mentioned above.

Hereinafter, the present invention will be described with reference to the accompanying drawings showing one embodiment thereof.

In the figure, reference numeral 1 denotes a closed container in which an electric element (not shown) and a compression element 1 are housed.

2 is a cylinder, 3 is a piston formed integrally with the rotating shaft,
4 is a vane slidably disposed within the slot of the piston 3, and 5 is a suction pipe directly connected to the inside of the cylinder 2.

6 is vane 4. bis)・n3. This is a cylinder chamber partitioned by cylinders 2.

7 is a discharge hole, and 8 is a discharge valve.

9 is a discharge chamber, and the gas in this discharge chamber 9 is discharged through a discharge pipe 10.
It is guided out of the container 1 at this point.

A discharge valve lift 11 regulates the lift of the discharge valve 8, and is fixed together with the discharge valve 8 by a discharge valve bolt 12.

A valve chamber 13 is provided in a bolt hole 12' for the bolt 12, and this valve chamber 13 opens into the closed container 1 through a communication hole 14.

15 is a check valve; 16 is a check valve 15. This is a line 1 ring placed between bolts 12.

Next, the operating conditions of the compressor having the above configuration will be explained.

When the piston 3 rotates in the direction of the arrow, the gas sucked into the cylinder chamber 6 from the suction pipe 5 is released from the discharge hole 7 by the vane 4 provided on the piston 3 coming into contact with the inner wall of the cylinder 2 and compressing it. Discharge valve 8. It is discharged from the discharge pipe 10 via the discharge valve chamber 9.

After that, it passes through an intercooler (not shown) and returns to case 1'.
released within.

During liquid compression, the pressure within the cylinder chamber 6 increases rapidly.

At this time, the pressure in the valve chamber 13 pushes up the check valve 15 against the elasticity of the spring 16.

Thereby, the liquid in the cylinder chamber 6 is transferred to the valve chamber 13. Communication hole 1
4 and is discharged into the closed container 1, no excessive force is applied to the vane 4 or the discharge valve 8, and no damage occurs.

In addition, since the discharge valve bolt 12 is also used as a stopper for the spring 16, the number of parts can be reduced compared to the conventional liquid compression prevention device.
．． 8. Assemble the spring 16 on the discharge. Discharge valve riff I
・Since it can be installed at the same time as 11, work efficiency is also improved.

As is clear from the above embodiments, the liquid compression prevention device for a compressor according to the present invention includes a piston, a cylinder chamber in which the piston rotates, and a cylinder provided in a closed container, and a cylinder provided in the cylinder. A discharge valve for opening and closing the discharge hole, a discharge valve bolt for fixing the discharge valve and the discharge valve rift 1 to 1, and a bolt hole for fixing the discharge valve bolt are provided in the cylinder, and the bolt hole is placed in the airtight container. This is because it is equipped with a valve chamber formed by communicating with the valve chamber, and a check valve provided on the side of the valve chamber communicating with the cylinder chamber and biased by a spring that is in contact with the discharge valve bolt. , the discharge valve bolt can also be used as a spring stopper, which reduces the number of parts and can be manufactured at low cost.In addition, when fixing the discharge valve and discharge valve lift, it can be used to prevent backlash at the same time as tightening the discharge valve bolt. It has various advantages such as being able to incorporate valves and springs and improving workability.

[Brief explanation of drawings]

FIG. 1 is a plan sectional view of a compressor equipped with a liquid compression prevention device according to an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of the liquid compression prevention device in the same compressor. 1... Airtight container, 6... Cylinder chamber,
8...Discharge valve, 11...Discharge valve ref l
-112...Discharge valve bolt, 12...
・Bolt hole, 13... Valve chamber, 14...
Communication hole, 15... Check valve, 16... Spring.

Claims (1)

[Scope of utility model registration request] A piston, a cylinder that has a cylinder chamber in which the piston rotates and is provided in a closed container, a discharge valve that opens and closes a discharge hole provided in this cylinder, and a discharge valve that fixes the discharge valve and the discharge valve lift. A bolt and a bolt hole for fixing this discharge valve bolt are provided in the cylinder, and one end of this bolt hole communicates with the airtight container and the other end communicates with the cylinder chamber. A liquid compression prevention device for a compressor equipped with a check valve biased by a spring installed on the cylinder side and in contact with a discharge valve bolt.