KR19980077165A - Discharge valve fixing structure of flapper valve assembly of reciprocating compressor - Google Patents

Abstract

The present invention provides a discharge valve fixing structure of a flapper valve assembly of a reciprocating compressor.

The discharge valve fixing structure of the flapper valve assembly of the reciprocating compressor is disposed on the upper surface of the cylinder block 13 and is discharged to the cylinder chamber 13 'and the discharge port 51' and around the discharge port 51 '. A valve plate 51 having a valve seat 51 formed at one side, one rivet hole spaced apart from the discharge port 51 ', and an embossed insertion groove 51b at an upper surface thereof; A flapper discharge valve 52 having a rivet hole and an embossed insertion groove formed at the other end thereof so that one end of the valve plate 51 can be opened and closed according to the internal pressure of the cylinder chamber 13 '; It is fixed to the valve plate 51 by one rivet 54 so as to fixedly limit the opening degree of one end of the flapper discharge valve 52 in the upper part of the flapper discharge valve 52, and to prevent rotation. A stopper 53 on which the anti-rotation embossing 53 coupled to the embossing insertion groove 51b of the valve plate 51 is formed downward; And one rivet 54 for fixing the flapper discharge valve 52 and the stopper 53 to the valve plate 51.

Accordingly, by forming the anti-rotation embossing 53 and the embossing insertion groove 51b, the rivet for the separate rotation prevention is unnecessary in a simple structure, thereby reducing the number of parts and reducing the assembly labor. .

Description

Discharge valve fixing structure of flapper valve assembly of reciprocating compressor

The present invention relates to a fixed structure of the discharge valve of the flapper valve assembly of the reciprocating compressor, and more particularly, to reduce the number of parts and assembly by fixing the stopper while preventing the stopper rotation of the discharge valve. The discharge valve fixing structure of the flapper valve assembly of the reciprocating compressor.

Compressors typically convert mechanical energy into compressive energy of a compressive fluid, which are reciprocating, rotary and turbo. When such a compressor is used for a refrigerator, the saturated steam of a low boiling point refrigerant having the inside of the refrigerator as a low heat source and the outside as a high heat source is compressed to a high pressure and flowed to a condenser. In the condenser, latent heat of evaporation is released from the high-pressure and high-temperature refrigerant to a high heat source outside the refrigerator, causing a phase change to a liquid refrigerant, and the liquid refrigerant is throttled to low pressure and low temperature through an expansion valve. It enters the evaporator. The low pressure and low temperature refrigerant in the evaporator absorbs latent heat from the low heat source inside the refrigerator in the liquid phase, thereby causing a phase change to the saturated steam refrigerant, and then flowing into the compressor described above to form a refrigeration cycle. In the middle of repeating such a refrigeration cycle, the inside of the refrigerator is continuously supplied with cold air to bring about the desired refrigeration (long) effect.

Normally, the compressor for a domestic refrigerator is mainly installed in the lower part of the refrigerator while being closed in a case together with its driving electric motor in a single stage reciprocating type, and the internal structure of the state in which the upper case is removed is shown in plan view in FIG.

In the reciprocating compressor 10, the electric motor and the compressor are hermetically housed in the upper and lower cases 12 and 11 for soundproofing and dustproofing, and the upper and lower cases 12 and 11 are predetermined. At intervals of, it is supported by means of suitable dust and soundproofing means, for example compression springs or leaf springs, through the frame 24 at the lower and side portions thereof in the upper and lower cases 12, 11.

The above-mentioned reciprocating compressor has a cylinder block 13 fixed to the upper part of the frame 24 horizontally in FIG. 1 and a piston 14 reciprocally inserted into the cylinder chamber 13 'inside thereof ( 2, the low pressure and low temperature refrigerant gas is sucked through the suction and discharge valve assembly 15 provided at the left end of the cylinder block 13 by the reciprocating motion of the piston 14. The gas is discharged. The suction and discharge valve assembly 15 is composed of a flapper or reed type thin plate structure which is usually elastic for miniaturization, and the flapper or lead type suction and discharge valve assembly 15 is double-sided. It is opened and closed passively by the pressure difference applied to it.

In the reciprocating compressor configured as described above, the suction pipe (connecting pipe) 22 in which the low pressure and low temperature refrigerant gas is hermetically fixed to the upper or lower cases 12 and 11 during the backward movement of the piston 14. And a high pressure discharged from the external evaporator (not shown) via the suction muffler 16 to the suction lead valve of the suction and discharge valve assembly 15, and discharged from the compressor during the forward movement of the piston 14, The high temperature refrigerant gas is externally discharged from the discharge valve of the suction and discharge valve assembly 15 through the discharge pipe 23 'and the discharge pipe connecting pipe 23 fixedly sealed to the upper or lower cases 12 and 11. To a condenser (not shown). The refrigerant charging pipe 22 'is hermetically fixed to the lower case 11, and initially filled with refrigerant gas, and then sealed.

Compressor noise, which occupies most of the operation noise of the refrigerator, is generated by reciprocating motion of the piston 14, opening and closing shock of the suction and discharge valve assembly 15, pulsation of the refrigerant gas, and pulsation of the discharge gas. And a refrigerant gas introduced into the suction pipe (connecting pipe) 22 in order to reduce noise due to pulsation of the discharge pressure, while being filled in the upper and lower cases 12 and 11, and the cylinder through the suction muffler 16. The refrigerant sucked into the chamber 13 'and compressed in the cylinder chamber 13' is discharged through the discharge muffler 17 to the discharge pipe 23 '.

On the other hand, the electric motor is composed of a stator 18 fixed to the lower part of the frame 24, and a rotor 19 rotating with a gap between the stator 18 (see Fig. 2), the rotor 19 is fixed to the rotating shaft 20 and rotatably supported by the frame 24 to rotate together. By forming the eccentric shaft 21 at the end of the rotating shaft 20 of the electric motor to the upper portion of the frame 24 to connect the piston 14 to the eccentric shaft 21 through the connecting rod and the number of shafts, The piston 14 reciprocates by the amount of eccentric rotation of the eccentric shaft 21. In addition, an external power source is applied to the winding coil of the stator 18 of the electric motor via an external terminal 18 'which is hermetically fixed to the upper and lower cases 12 and 11.

In order to smoothly operate the compressor and the driving motor operating as described above, a coolant oil storage tank 25 in which coolant oil is stored is formed at the bottom of the lower case 11, and the lubricating oil supply groove 20 'of the rotating shaft 20 is formed. As it is sucked into the upper portion, the refrigerant oil is supplied to each lubrication part to perform lubrication.

Figure 3 shows an example of the discharge valve fixing structure of the flapper valve assembly of the conventional reciprocating compressor described above.

The compact flapper discharge valve system comprises a valve plate 31, a discharge valve 32, a stopper 33, and a valve cover (not shown).

The valve plate 31 is formed with a discharge port 31 ′ communicating with the inside of the cylinder chamber 13, and a valve seat 31 on which the discharge valve 32 is seated is formed around the discharge port 31 ′. At the top of the discharge port 31 ', the discharge valve 32 is fixed by the rivet 34 at the other end so as to be opened and closed for discharge of the high pressure gas at one end. At this time, the rivet 34 is used to prevent the rotation of the stopper 33, two rivets 34 are used. As shown in FIG. 3, in the case of the compact compressor, grooves and rivet holes around the discharge port 31 ′ and the valve seat 31 are formed by press working, as shown in FIG. 3. After that, both sides are finished polishing for airtightness.

The stopper 33 fixedly limits the opening degree of the discharge valve 32 to a fixed position and is manufactured by press working, and fixed to the valve plate 31 by two rivets 34 as described above. do.

Although not shown, a backing spring may be provided between the discharge valve 32 and the stopper 33 to restrict elastically the opening and closing area of the discharge valve 32, as in the case of a large size.

However, the discharge valve fixing structure of the flapper valve assembly of the reciprocating compressor of the above-described structure requires two rivets 34 to prevent rotation of the stopper 33, and the machining for this also requires twice the processing. There is a problem that the number is increased and the manufacturing labor is increased.

Accordingly, the present invention is to solve the above-mentioned problems, the simple structure of the flapper valve assembly of the reciprocating compressor can reduce the number of parts and assembly by fixing the stopper while preventing the rotation of the stopper of the discharge valve The purpose is to provide a discharge valve fixing structure.

1 is a plan view showing the internal structure of a hermetic reciprocating compressor;

2 is a cross-sectional view taken along line 2-2 of FIG. 1 showing the internal structure of the hermetic compressor;

3 is a detailed partial cross-sectional view showing a discharge valve fixing structure of a flapper valve assembly of a conventional reciprocating compressor;

4 is a partial detailed cross-sectional view showing the discharge valve fixing structure of the flapper valve assembly of the reciprocating compressor according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10 compressor 11 lower case

12: upper case 13: cylinder block

14 piston 15 suction and discharge valve assembly

16: suction muffler 17: discharge muffler

18: stator (stator) 19: rotor (rotor)

20: axis of rotation 21: eccentric shaft

22: suction pipe (connecting pipe) 23: discharge pipe connecting pipe

23 ': discharge pipe 24: frame

25: refrigerator oil reservoir 31, 51: valve plate

31 ', 51': outlet 31, 51: valve seat

32, 52: discharge valve 33, 53: stopper

34, 34 ', 54: rivet 51a: protrusion insertion groove

51b: embossed insertion groove 53 ': anti-rotation protrusion

53: anti-rotation embossing

In order to achieve this object, the discharge valve fixing structure of the flapper valve assembly of the reciprocating compressor according to an embodiment of the present invention is fixed to the upper surface of the cylinder block to seal the upper portion of the cylinder chamber and the piston in the cylinder chamber. A compressor having a flapper type suction and discharge valve assembly that is opened and closed in accordance with a reciprocating motion of a compressor, the compressor comprising: a discharge port that is closed on an upper surface of a cylinder block and is connected to a cylinder chamber, a valve seat formed around the discharge port, and spaced apart from the discharge port. A valve plate having one rivet hole and an embossed insertion groove on an upper surface thereof; A flapper discharge valve having a rivet hole and an embossed insertion groove formed at the other end thereof so that one end of the valve plate is opened and closed according to the internal pressure of the cylinder chamber; For preventing rotation, which is fixed to the valve plate by one rivet to fix the opening degree of one end of the flapper discharge valve at the top of the flapper discharge valve and engages with the embossed insertion groove of the valve plate to prevent rotation. A stopper in which embossing is formed downward; And one rivet for fixing the flapper discharge valve and the stopper to the valve plate.

The anti-rotation embossing of the stopper may be formed by pressing at the same time as the blanking near the other end of the stopper. When the valve plate is a steel plate structure, the embossing insertion groove of the valve plate is press-pressed to press the valve seat. It can be formed with.

In addition, the stopper is also formed in the stopper is bent by the pressing process, the projection insertion groove is inserted into the rotation prevention projection is formed on the upper surface of the valve plate to prevent the rotation more firmly by interacting with the rotation prevention embossing You can do it.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation of the embodiment of the present invention.

Figure 4 is shown in detail as a partial cross-sectional view of the discharge valve fixing structure of the flapper valve assembly of the reciprocating compressor according to an embodiment of the present invention. The fixed structure of the discharge valve is such that the flapper-type discharge valve 52 and the stopper 53 are fixed to the valve plate 51 by one rivet 54, and the rotation is prevented by the anti-rotation embossing 53. It is composed.

That is, in Fig. 4, the valve plate 51 is fixed to the upper surface of the cylinder block 13 so as to seal the upper portion of the cylinder chamber 13 'through a suction valve, and the piston in the cylinder chamber 13'. A flapper type suction valve (not shown) and a flapper type discharge valve 52 which are opened and closed in accordance with the reciprocating motion of 14 are provided so as to be opened and closed in accordance with the pressure of the cylinder chamber 13 'at one end. A discharge opening 51 'is formed in the valve plate 51 for the flapper discharge valve 52 to the cylinder chamber 13', and a valve seat 51 formed around the discharge opening 51 'is provided. One rivet hole for fixing the stopper 53 together with the flapper discharge valve 52 by the rivet 54 at a position spaced from the discharge port 51 'is formed. In addition, an embossing insertion groove 51b for preventing rotation of the stopper 53 is inserted into the upper surface of the valve plate 51 to prevent rotation. When the valve plate 51 has a steel plate structure as in a compact compressor for low manufacturing cost, the embossed insertion groove 51b of the valve plate 51 is formed together with the valve seat 51 by press-pushing. Can be.

The other end of the flapper discharge valve 52 is formed with a rivet hole and an embossed insertion hole for fixing by the rivet 54.

The stopper 53 is connected to the valve plate 51 by one rivet 54 so as to fixedly limit the opening degree of one end of the flapper discharge valve 52 at the top of the flapper discharge valve 52. It is fixed, the anti-rotation embossing 53 is formed to be coupled to the embossed insertion groove 51b of the valve plate 51 to prevent its rotation. The anti-rotation embossing 53 of the stopper 53 can be formed simultaneously with the blanking by press working near the other end of the stopper 53.

In addition, the stopper 53 may be formed by bending the anti-rotation protrusion 53 'by pressing, and in this case, the protrusion insertion groove 51a into which the anti-rotation protrusion 53' is inserted is the valve plate 51. Is formed on the upper surface of the) to prevent further rotation with the anti-rotation embossing (53).

A detailed assembly and operation of the discharge valve fixing structure of the flapper valve assembly of the reciprocating compressor according to the exemplary embodiment of the present invention configured as described above will be described with reference to FIG. 4.

First, the valve plate 51, the flapper discharge valve 52, and the stopper 53, which are constructed and formed as described above, are sealed by the flapper suction valve according to the structure thereof. It is arranged on the upper surface of the cylinder block 13 so that.

At this time, by inserting the anti-rotation embossing 53 of the stopper 53 into the embossing insertion groove 51b of the upper surface of the valve plate 51 is naturally locating without a separate alignment.

Thereafter, the assembly for fixing is completed by inserting and caulking one rivet 54 through each rivet hole.

As such, only one rivet is needed and the riveting work is also reduced, and the location of the stopper 53 is also made simple.

Further, when the anti-rotation protrusion 53 'and the protrusion insertion groove 51a are formed in the stopper 53 and the valve plate 51, the location thereof becomes easy and the anti-rotation is made firm.

According to the configuration and operation of the discharge valve fixing structure of the flapper valve assembly of the reciprocating compressor according to the embodiment of the present invention described above, by forming the anti-rotation embossing 53 and the embossed insertion groove 51b, As a structure, a separate rivet for preventing rotation is unnecessary, so that not only the parts are reduced but also the number of assembly labor is reduced.

Claims (4)

A flapper suction and discharge valve fixed to an upper surface of the cylinder block 13 to seal the upper portion of the cylinder chamber 13 'and opened and closed according to the reciprocating motion of the piston 14 in the cylinder chamber 13'. In a compressor with assembly 15: The discharge port 51 'which is arranged to be closed on the upper surface of the cylinder block 13 and leads to the cylinder chamber 13', the valve seat 51 formed around the discharge port 51 ', and the discharge port 51' A valve plate 51 having one rivet hole spaced apart from each other, and an embossed insertion groove 51b on an upper surface thereof; A flapper discharge valve 52 having a rivet hole and an embossed insertion groove formed at the other end thereof so that one end of the valve plate 51 can be opened and closed according to the internal pressure of the cylinder chamber 13 '; It is fixed to the valve plate 51 by one rivet 54 so as to fixedly limit the opening degree of one end of the flapper discharge valve 52 in the upper part of the flapper discharge valve 52, and to prevent rotation. A stopper 53 on which the anti-rotation embossing 53 coupled to the embossing insertion groove 51b of the valve plate 51 is formed downward; And A discharge valve of the flapper valve assembly of the reciprocating compressor, wherein the flapper discharge valve 52 and the stopper 53 are fixed to the valve plate 51. Fixed structure. The flapper valve assembly of the reciprocating compressor according to claim 1, wherein the anti-rotation embossing (53) of the stopper (53) is formed by pressing and simultaneously blanking near the other end of the stopper (53). Discharge valve fixing structure. The valve plate 51 according to claim 1 or 2, wherein when the valve plate 51 has a steel plate structure, the projection insertion groove 51a of the valve plate 51 is formed together with the valve seat 51 by press pressure applying. Discharge valve fixing structure of the flapper valve assembly of the reciprocating compressor, characterized in that the. 3. The stopper 53 has a rotation preventing projection 53 'formed by bending by pressing, and the projection insertion groove 51a into which the rotation preventing projection 53' is to be inserted. A discharge valve fixing structure of a flapper valve assembly of a reciprocating compressor, which is formed on an upper surface of the valve plate 51.