KR200221545Y1 - A retainer structure for hermetic compressor - Google Patents

Abstract

The present invention relates to a retainer structure for a discharge valve of a hermetic compressor. In the present invention, the retainer 40 is integrally formed in the discharge chamber 32 of the head cover 30. In addition, a plurality of oil grooves 42 are formed in the retainer 40 to allow oil to remain. As the oil remains in the oil groove 42, the impact applied to the retainer 40 by the valve plate 9v for controlling the discharge of the working fluid is alleviated, so that a separate valve spring is not required and the retainer ( There is an advantage that the design freedom of the 40) is increased.

Description

Retainer structure for discharge valve of hermetic compressor {A retainer structure for hermetic compressor}

The present invention relates to a hermetic compressor, and more particularly to a retainer structure for a discharge valve for controlling the behavior of the discharge valve for discharging the compressed working fluid in the compression chamber.

1 shows an internal configuration of a hermetic compressor according to the prior art. According to this, the sealed container 1 which consists of the upper container 1t and the lower container 1b is provided, and the frame 2 is provided in the inside of the said sealed container 1. The stator 3 is fixed to the frame 2, and the frame 2 is supported inside the sealed container 1 by a spring 2S.

The crankshaft 5 is provided through the center of the frame 2. The crankshaft 5 is integrally provided with a rotor 4 and rotated together with the crankshaft 5 by electromagnetic interaction with the stator 3.

An eccentric pin 5b is formed on the upper end of the crankshaft 5 so as to be eccentric with respect to the rotation center of the crankshaft 5. A counterweight 5c is formed on the opposite side to which the eccentric pin 5b is formed, and the crankshaft 5 is rotatably supported by the frame 2.

An oil passage 5a is formed inside the crankshaft 5. The oil L provided on the bottom surface of the sealed container 1 is guided through the oil passage 5a to be delivered to the upper portion of the frame 2 and scattered. In addition, a pumping mechanism 5d for pumping the oil L to the oil passage 5a is installed at the lower end of the crankshaft 5.

On the other hand, the cylinder 6 provided with the compression chamber 6 'inside is integrally molded with the said frame 2. As shown in FIG. In the compression chamber 6 ′, a piston 7 connected to the eccentric pin 5b of the crankshaft 5 and the connecting rod 8 is provided. At the front end of the cylinder 6, a valve assembly 9 for controlling the refrigerant flowing into and out of the compression chamber 6 'is installed. The head cover 10 is mounted on the valve assembly 9, and the head cover 10 is connected to the valve assembly 9 so that the suction muffler 11 can transfer refrigerant to the compression chamber 6 ′. It is installed.

On the other hand, with reference to Figure 2 will be described the main portion of the valve assembly (9). A valve plate 9p is provided at the tip of the cylinder 6. The valve plate 9p is provided with a seating groove 9g in which a configuration for controlling discharge of the refrigerant compressed in the compression chamber 6 'is discharged. The discharge port 9e penetrates through one side of the valve plate 9p, and the suction port 9i penetrates through the other side of the valve plate 9p.

The seating groove 9g is provided with a valve plate 9v for opening and closing the discharge port 9e. The shape of the valve plate 9v is well illustrated in FIG. 3, the front end portion of which is installed at a position corresponding to the discharge port 9e and opens and closes 9v 'to open and close the discharge port 9e, and the other end is below. It is a fixing portion 9v 'which is pressed and fixed by the retainer 9r to be described.

And the valve spring 9s is provided so that it may overlap with the said valve board 9v. The tip end of the valve spring 9s serves to control the swing of the valve plate 9v. And the other end is a fixed part which is pressed and fixed by the said retainer 9r.

A retainer 9r is seated in the seating groove 9g to fix the upper portion of the valve plate 9v and the valve spring 9s. A portion of the upper portion of the inner surface of the retainer 9r that corresponds to the front end of the valve spring 9s is formed as a restricting portion 9r 'and lower than other portions to regulate the fluctuation of the valve spring 9s. The valve assembly described here is only the main portion thereof. In the figure, reference numeral 9i denotes a suction port for sucking refrigerant into the compression chamber 6 '.

On the other hand, as shown in Figure 4 is also used a configuration in which the retainer is integrally formed in the head cover, it will be described, the discharge chamber 10r is discharged inside the head cover (10 ') is discharged compressed The retainer 9R is integrally formed on one side of the discharge chamber 10r. At this time, the retainer 9R is made to correspond to the shape of the discharge valve 9v or the valve spring 9s so as to control the behavior of the discharge valve 9v or the valve spring 9s. Reference numeral 11 'denotes a muffler seating portion.

In this configuration, the refrigerant is sucked into the compression chamber 6 'and the compressed refrigerant is discharged through the following process. That is, when the piston 7 moves to the bottom dead center from the top dead center, a relatively low pressure is formed inside the compression chamber 6 ', and the compression chamber 6 is formed through the suction port 9i. The refrigerant is sucked into the interior of '). At this time, the valve plate 9v is attracted to the valve plate 9p by the low pressure inside the compression chamber 6 'and closes the discharge port 9e.

When the piston 7 starts to move from the bottom dead center to the top dead center again, the suction port 9i is closed by the pressure generated in the compression chamber 6 '. In this state, the piston 7 continues to move toward the top dead center to compress the refrigerant. When the piston 7 reaches the top dead center, the valve plate 9v is pushed by the pressure of the compressed refrigerant to open the discharge port 9e and the refrigerant is discharged to the outside of the compression chamber 6 '. do.

At this time, the valve spring 9s prevents the valve plate 9v from being excessively attenuated, allows the valve spring 9v to be quickly returned to close the discharge port 9e, and the restricting portion 9r of the retainer 9r. ') Regulates the operation of the valve spring 9s.

However, the conventional compressor in which the valve assembly is operated in the above manner has the following problems.

That is, since the configuration for discharging the refrigerant compressed in the compression chamber 6 'to the outside is composed of several parts, the manufacturing cost is increased, and workability of the assembly work is deteriorated.

In addition, due to the large number of parts to be assembled, a large number of assembly tolerances are generated during assembly, so that the operation for discharging the refrigerant is not accurately performed, thereby reducing the operational reliability of the compressor.

If the valve spring (9s) is removed to solve this problem, the valve plate (9v) is in direct contact with the retainers (9r, 9R), there is a problem that a lot of noise occurs.

Therefore, an object of the present invention is to solve the conventional problems as described above, and to simplify the configuration for the operation of the discharge valve in the hermetic compressor.

Another object of the present invention is to minimize the noise generated when the discharge valve of the hermetic compressor.

1 is a cross-sectional view showing the internal configuration of a conventional hermetic compressor according to the prior art.

Figure 2 is a cross-sectional view showing a valve device and related parts of the hermetic compressor according to the prior art.

Figure 3 is a plan view showing the configuration of the valve spring and the valve plate constituting the valve device of the hermetic compressor according to the prior art.

Figure 4 is a front view showing the structure of the head cover formed with a discharge valve retainer according to another prior art.

Figure 5 is a front view showing the structure of the head cover provided with a retainer for the discharge valve of the hermetic compressor according to the present invention.

6 is a cross-sectional view taken along the line AA ′ of FIG. 5.

Explanation of symbols on the main parts of the drawings

1: 1t sealed container: upper container

2: frame 2S: spring

3: stator 4: rotor

5: crankshaft 6: cylinder

6 ': compression chamber 7: piston

8: Connecting Rod 9: Valve Assembly

10: Head cover 11: suction muffler

12: suction pipe 13: discharge pipe

30: head cover 32: discharge chamber

34: bolt hole 36: muffler seat

40: retainer 42: oil groove

According to a feature of the present invention for achieving the above object, the present invention is a retainer for controlling the behavior of the discharge valve for selective communication between the discharge chamber of the compression chamber and the head cover, and a plurality of oil is formed on the surface of the retainer It is configured to include an oil containing portion containing.

The oil-containing portion is a plurality of oil grooves formed to be recessed on the surface of the retainer and is provided in an area in which the discharge valve contacts the surface of the retainer.

The retainer is integrally formed with the head cover.

According to the present invention having such a configuration, the number of components for the operation of the discharge valve is reduced, so that manufacturing cost is lowered and assembly performance is improved while operating noise is reduced.

Hereinafter, a preferred embodiment of the hermetic compressor according to the present invention having the configuration as described above will be described in detail with reference to the accompanying drawings. The same as those of the prior art will be described using the same reference numerals.

5 and 6, the discharge chamber 32 is formed on the inner surface of the head cover 30 fastened to the cylinder 6 with the valve assembly 9 interposed therebetween. The discharge chamber 32 is a portion where the working fluid compressed in the compression chamber 6 'of the cylinder 6 is discharged. In addition, a bolt hole 34 through which a bolt (not shown) for fastening to the cylinder 6 together with the valve assembly 9 is penetrated at four corners of the head cover 30.

A muffler seating portion 36 is formed at one side of the lower end of the head cover 30. One side of the suction muffler 11 is seated on the muffler seating portion 36. The working fluid sucked into the compressor from another component of the heat exchange cycle is inside the compression chamber 6 ′ through the suction muffler 11. Is inhaled. The working fluid sucked through the muffler seating portion 36 is relatively low pressure compared to the working fluid discharged to the discharge chamber 32 and should be partitioned so that leakage does not occur between them.

On the other hand, the valve plate 9v of the discharge valve is used to control the discharge of the working fluid compressed into the discharge chamber 32. Since the structure of the said valve board 9v is a general thing, detailed description is abbreviate | omitted.

A retainer 40 for controlling the behavior of the valve plate 9v is integrally formed inside the discharge chamber 32 of the head cover 30. That is, the retainer 40 is formed together in the discharge chamber 32 at the time of manufacturing the head cover 30. Such a retainer 40 is preferably formed to correspond to the shape of the valve plate 9v for controlling the discharge of the working fluid. In addition, the formation position of the retainer 40 corresponds to the upper portion of the valve plate 9v when the head cover 30 is mounted to the cylinder 6.

Here, a plurality of oil grooves 42 are formed on the surface of the retainer 40. The oil groove 42 is a minute groove having a very small diameter and has a size such that the oil L used in the compressor can remain. The region in which the oil groove 42 is formed may be the entirety of the retainer 40 as shown in FIG. 5, but is not necessarily the valve plate 9v of the retainer 40. It may be formed only in the part in contact.

Hereinafter, the operation of the retainer structure for the discharge valve of the hermetic compressor according to the present invention having the configuration as described above will be described in detail.

The head cover 30 is always fastened by using a bolt to the cylinder 6 in a state in which the valve assembly 9 is placed between the cylinder 6. In this way, the head cover 30 is assembled so that the retainer 40 is positioned in a predetermined distance from the valve plate 9v for controlling the discharge of the working fluid from the compression chamber 6 '.

In the process of compressing the working fluid in the compression chamber 6 ', the valve plate 9v selectively communicates the compression chamber 6' with the discharge chamber 32, thereby compressing the working fluid. It can be discharged to the discharge chamber (32).

At this time, while the valve plate 9v flows at a high speed, communication and closing between the compression chamber 6 'and the discharge chamber 32 are repeated, and the valve plate 9v is excessively opened, so that the retainer 40 Is controlled by

On the other hand, the main cause of the noise caused by the valve plate 9v is that the valve plate 9v has the head cover 30 when it communicates with the compression chamber 6 'and the discharge chamber 32, that is, when it is opened. Is a vibration caused by Such vibration can be adjusted by varying the shape of the retainer 40 or the gap between the retainer 40 and the valve plate 9v.

That is, by reducing the gap between the retainer 40 and the valve plate 9v, the degree of opening of the valve plate 9v can be reduced, thereby reducing the amount of impact exerted by the valve plate 9v. However, this will reduce the discharge amount of the working fluid will have a large impact on the performance of the compressor.

Therefore, in the present invention, a plurality of oil grooves are formed in the retainer 40 in order to buffer shocks applied by the valve plate 9v while maintaining the gap between the retainer 40 and the valve plate 9v to some extent. 42 is formed so that the oil (L) remains in the oil groove 42 to mitigate the impact by the valve plate (9v).

On the other hand, by forming the oil groove 42 as described above to mitigate the impact of the valve plate (9v) by the oil (L) it is possible to sufficiently alleviate the vibration without using a separate valve spring.

In the present specification, the valve device of the present invention has been described using the discharge valve as an example, but may be applied to the intake valve, and various modifications and variations can be made by any person skilled in the art within the scope of rights described in the claims of the present invention.

The valve device of the hermetic compressor according to the present invention as described in detail above was designed to mitigate the impact applied to the head cover by the valve plate so that oil remains in the oil groove formed in the retainer in contact with the valve plate. The position design is free and there is no need to use a valve spring to mitigate the impact of the valve plate.

In addition, since the number of parts for controlling the driving of the valve plate is reduced, the assembly tolerance is relatively reduced, so that the discharge operation of the compressed refrigerant is more precisely performed, thereby improving the operation characteristics of the compressor, thereby improving reliability.

Claims (3)

A retainer for controlling the behavior of the discharge valve for selective communication between the compression chamber and the discharge chamber of the head cover; Retainer structure for the discharge valve of the hermetic compressor characterized in that it comprises a plurality of the oil containing portion is formed on the surface of the retainer containing oil The retainer structure for a discharge valve of a hermetic compressor according to claim 1, wherein the oil-containing portion is a plurality of oil grooves formed to be recessed on the surface of the retainer and is provided in a region in which the discharge valve contacts the surface of the retainer. 3. The retainer structure for a discharge valve of a hermetic compressor according to claim 1 or 2, wherein the retainer is formed integrally with the head cover.