JPS645165Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a rotary compressor, and particularly relates to an improvement of a discharge valve holder thereof.

Conventional rotary compressors include those shown in FIGS. 1 and 2. 1 is a sealed container, 2
3 is a crankshaft driven by an external power such as an electric motor (not shown); 3 is a cylinder having a compression chamber 4 concentric with the crankshaft 2 formed on its inner circumference; 5 is an opening on the drive side of the compression chamber 4; 6 is a side housing that closes the opening on the side opposite to the drive side of the compression chamber 4; 7 is a rotatable rolling member located inside the compression chamber 4 and locked to the eccentric portion 2a of the crankshaft 2; A piston, 8 is a vane guide groove formed in the axial direction of the cylinder 3, 9 is slidably inserted into this guide groove, and a rolling piston 7
10 is a compression spring that presses the vane 9 against the outer peripheral surface of the rolling piston 7; 11 is a peripheral wall surface of the compression chamber 4; This discharge port 11 has a cross-sectional area sufficient to allow the compressed gas to pass therethrough. 12 is a round hole-shaped valve chamber that communicates with the discharge port 11 and is formed in the axial direction of the cylinder 3; 13 is a discharge valve;
The discharge port 11 is inscribed in the valve chamber 12 and at its free end.
It is formed of an elastic thin plate with a C-shaped cross section that can be opened and closed freely. Reference numeral 14 denotes a valve holding body that regulates the stroke of the discharge valve 13, and is a substantially round member that is installed inside the discharge valve 13 and clamps one end of the discharge valve 13 and fixes it to the cylinder 3. It is housed in the chamber 12. A fixing bolt 15 is a fixing member, and this bolt 15 is screwed to the valve holder 14 to fix the base of the discharge valve 13 at a position facing the discharge port 11 on the peripheral wall of the valve chamber 12. 16 is a discharge hole communicating with the valve chamber 12.

Next, the operation of the conventional rotary compressor will be explained. Every time the crankshaft 2 rotates once, the free end of the discharge valve 13 is pressed against the spring pressure of the discharge valve 13 itself by the high-pressure gas compressed in the compression chamber 4 by the rolling piston 7. Presser foot 1
It deforms elastically until it comes into contact with 4. During this time, high pressure gas flows from the compression chamber 4 through the discharge port 11 to the valve chamber 12.
The liquid enters the air and is discharged from the discharge hole 16.

However, in the conventional rotary compressor, the valve retainer 14 is manufactured by cutting drawn material, so that when it is attached to the valve chamber 12, it may be assembled in the wrong direction. In order to prevent such malfunctions, it is necessary to mark a certain end face of one side, which is not only troublesome but also one of the factors that impedes productivity.

This idea was made to eliminate the above-mentioned drawbacks of the conventional valve holder.By making the valve holder from sintered material and forming both end faces in different shapes, malfunctions can be prevented without marking. The purpose of this invention is to provide a valve retainer that can prevent the above problems and has higher productivity.

An embodiment of this invention will be described below with reference to the drawings. FIG. 3 shows both side views and a side sectional view of the valve retainer 14 according to this invention. Figure 3A shows side A,
Figure 3B shows sides B, in which side A has a chamfered portion on the outer periphery of the valve holder 14 concentrically with the hollow circular portion, and side B has a chamfered portion on the outer periphery along the outer periphery. Therefore, both end surfaces of the valve holder have different shapes. Therefore, the difference in shape of both end faces A and B can be easily distinguished, and marking in a fixed direction as in the conventional art is not necessary. It should be noted that in order to make the both end faces have a different shape, it can be easily manufactured by forming the corresponding portions of the mold of the sintered material into the different shape in advance, and the cost will not increase. Additionally, it is possible to simultaneously solve the problem of so-called "burrs" that occur in the pressurizing direction, which is unique to sintered materials.

As explained above, according to this idea,
It is possible to provide a high-quality valve retainer for a rotary compressor with high productivity, and there is an effect that malfunctions can be prevented with a simple configuration without the need for markings or the like.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view with some parts omitted of a conventional rotary compressor, Fig. 2 is a cross-sectional view of the same, and Fig. 3 shows an embodiment of this invention. Fig. 3A, Third
Figure B is a side view of the valve retainer, and Figure 3C is a sectional view of the same side. Note that the same reference numerals in the figures indicate the same or equivalent parts. 3...Cylinder, 4...Compression chamber, 11...Discharge port, 12...Valve chamber, 13...Discharge valve, 14...
...Valve holding body, 15...Fixing bolt.

Claims (1)

[Scope of utility model registration request] A compression chamber and a round valve chamber formed in the cylinder are connected through a discharge port, and within the valve chamber is a cross section C which is inscribed in the valve chamber and whose free end closes the discharge port so as to be openable and closable. A rotary compressor comprising a letter-shaped discharge valve and a valve holder having a substantially round outer diameter that is installed inside the discharge valve and clamps one end of the discharge valve and fixes it to the cylinder. A rotary compressor characterized in that both end faces of a valve holder are made of sintered material and have different shapes.