KR20030087778A - A discharge valve apparatus for hermetic compressor - Google Patents

Abstract

PURPOSE: A discharge valve apparatus of a hermetic compressor is provided to simplify components by allowing a movement control unit formed integrally with a discharge valve to execute function usually executed by a valve spring. CONSTITUTION: A discharge valve apparatus includes a valve plate(20) having an inlet and an outlet(24) connected with an inside of a compression chamber; a discharge valve(30) having one end fixed to the valve plate, and a free end opening and closing the outlet; a movement control unit(40) formed integrally with the discharge valve to control movement of the discharge valve; and a retainer(50) fixing the discharge valve to the valve plate. The discharge valve includes an opening and closing part(32) opening and closing the outlet, a fixed part(34) fixed to the valve plate by the retainer; a connecting neck part(36) connecting the opening and closing part and the fixed part; and the movement control unit extended from a front end of the opening and closing part to control movement of the opening and closing part. Alternatively, a head cover is used to fix the discharge valve instead of the retainer.

Description

A discharge valve apparatus for hermetic compressor

The present invention relates to a hermetic compressor, and more particularly to a discharge valve device for controlling the discharge of the working fluid compressed 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 constitutes an external appearance, and the sealed space in which the various components mentioned below are installed is formed in the inside. The frame 2 is installed inside the 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 installed 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. In addition, a discharge port 9e is formed to penetrate one side of the valve plate 9p. The valve seat 9t is formed at the edge of the discharge port 9e relatively higher than the periphery. Of course, although not shown in the drawings, the other side of the valve plate 9p has a suction port formed therethrough.

The seating groove 9g is provided with a discharge valve 9v for opening and closing the discharge port 9e. The shape of the discharge valve 9v is well illustrated in FIG. 3, the front end 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 the fixing part 9m pressed and fixed by the retainer 9r to be described. The opening / closing portion 9v 'and the fixing portion 9m are connected by a connecting neck portion 9n.

And a valve spring (9s) is provided so as to overlap with the discharge valve (9v). The tip end of the valve spring 9s serves to control the swing of the discharge valve 9v. The other end is a fixed portion that is pressed and fixed by the retainer 9r, and is fixed together with the fixed portion 9m of the discharge valve 9v.

A retainer 9r is seated in the seating groove 9g to fix the upper portion of the discharge valve 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 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 discharge valve 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 discharge valve 9v is pushed by the pressure of the compressed refrigerant to open the discharge port 9e to discharge the refrigerant to the outside of the compression chamber 6 '. do.

At this time, the valve spring 9s prevents the discharge valve 9v from being excessively attenuated, allows the valve spring 9 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 discharge valve device as described above has the following problems.

That is, the conventional discharge valve apparatus is comprised by providing the discharge valve 9v, the valve spring 9s, and the retainer 9r in the seating groove 9g of the valve plate 9p. Therefore, the number of parts is relatively increased, there is a problem that the management of parts during assembly is difficult and the number of work maneuver due to the addition of parts is increased.

In addition, since it is composed of a relatively large number of parts is difficult to check that one of the missing parts after assembly there is a problem that a lot of defects occur.

Accordingly, an object of the present invention is to solve the conventional problems as described above, and to provide a discharge valve device of a hermetic compressor with simplified components.

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 the configuration of a discharge valve device of a hermetic compressor according to the prior art.

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

Figure 4 is a cross-sectional view showing the configuration of a preferred embodiment of the discharge valve device of the hermetic compressor according to the present invention.

5 is a plan view showing the configuration of a discharge valve constituting an embodiment of the present invention.

Figure 6 is a plan view showing the configuration of a discharge valve constituting another embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

1: sealed container 1t: 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

20: valve plate 22: seating groove

24: discharge port 26: valve seat

30: discharge valve 32: opening and closing portion

34: fixed part 36: connecting neck

40: behavior control unit 50: retainer

According to a feature of the present invention for achieving the above object, the present invention is a valve plate which is formed with a suction hole and a discharge hole communicating with the interior of the compression chamber, one end is fixed to the valve plate and a free end opens and closes the discharge hole And a discharge control unit integrally formed with the discharge valve, a behavior control unit for controlling the behavior of the discharge valve, and a fixture for fixing the discharge valve to the valve plate.

The discharge valve is formed integrally extended to the opening and closing portion for opening and closing the discharge hole, the fixing portion fixed to the valve plate by the fastener, the connecting neck portion connecting the opening and closing portion and the opening and closing portion integrally formed It comprises a behavior control unit for controlling the behavior.

The discharge valve is formed integrally with the opening and closing portion for opening and closing the discharge hole, the fixed portion fixed to the valve plate by the fastener, the connecting portion connecting the opening and closing portion and the fixed portion, the connection neck portion and the behavior of the opening and closing portion It is configured to include a behavior control unit for controlling the.

The fixture may be either a retainer or a head cover.

The discharge valve device of the hermetic compressor according to the present invention having such a configuration has an advantage that the components thereof are relatively simplified to reduce the assembly labor and the manufacturing cost.

Hereinafter, a preferred embodiment of a discharge valve device of a hermetic compressor according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 shows a preferred embodiment of the discharge valve device of the hermetic compressor according to the present invention in a cross-sectional view, Figure 5 shows a discharge valve constituting an embodiment of the present invention in a plan view.

As shown in these figures, a seating groove 22 is formed on one surface of the valve plate 20 installed at the tip of the cylinder. The seating groove 22 is formed on the surface opposite to the surface in close contact with the cylinder. A discharge port 24 through which the working fluid compressed in the compression chamber is discharged is formed through the valve plate 20. The valve seat 26 is formed at the outlet side edge of the discharge port 24. The valve seat 26 is formed relatively high with respect to the bottom surface of the seating groove 22.

The discharge port 24 is opened and closed by the opening and closing portion 32 of the discharge valve 30. The discharge valve 30 is formed of a metal plate and has a predetermined spring force to be opened and closed according to the pressure inside the compression chamber. That is, when the pressure inside the compression chamber is low, the opening and closing part 32 is in close contact with the valve seat 26, and the discharge port 24 is closed. When the pressure inside the compression chamber is high, the discharge valve 30 is closed. The discharge port 24 is opened by the opening and closing portion 32 of the valve seat 26 being separated from the valve seat 26.

A fixed portion 34 is formed at one end of the discharge valve 30. The fixing part 34 is pressed by the retainer 50 to be described below to be fixed to the valve plate 20. The fixing part 34 is formed to be relatively wide in order to widen the contact area between the valve plate 20 and the retainer 50. The opening and closing part 32 and the fixing part 34 are connected by a relatively narrow connection neck 36.

On the other hand, the behavior control unit 40 is integrally formed by extending from the opening and closing portion 32 of the discharge valve 30. The behavior control unit 40 controls the behavior of the discharge valve 30, and in particular, the opening and closing unit 32 controls the opening and closing of the discharge port 24. The behavior control unit 40 controls the behavior of the opening and closing part 32 while the front end thereof is restricted by one side of the lower surface of the retainer 50.

The discharge valve 30 is fixed to the valve plate 20 by a retainer 50. The retainer 50 is pressed into the seating groove 22 of the valve plate 20 and fixed. The retainer 50 is provided with a pressing end 52 on its lower surface to fix the fixing part 34 of the discharge valve 30. The pressing end 52 is formed at a position corresponding to the fixing part 34 of the discharge valve 30. Therefore, when the retainer 50 is fixed to the seating groove 22, the pressing end 52 is pressed to fix each of the fixing parts 34. Steps may be provided on the bottom surface of the seating recess 22 to allow the pressing end 52 to more securely fix the fixing part 34.

A head cover (not shown) may fix the discharge valve 30 instead of the retainer 50. To this end, a lower surface of the head cover may have the same configuration as the pressing end 52.

Next, another embodiment of the present invention is shown in FIG. In this embodiment, the configuration of the discharge valve 30 'is different from the above embodiment. Therefore, only the configuration of the discharge valve 30 'will be described.

The discharge valve 30 'of the present embodiment includes an opening and closing portion 32' for opening and closing the discharge port 24, and a fixing portion 34 'for fixing the discharge valve 30' is provided with the opening and closing portion 32. ') Is formed at the opposite end. A relatively narrow connecting neck portion 36 'is formed between the opening and closing portion 32' and the fixing portion 34 '.

And the connection control part 36 'is formed with a behavior control unit 40'. The behavior control part 40 'is formed integrally with the connection neck part 36' and is formed at both ends of the connection neck part 36 'so that the width of the connection neck part 36' becomes relatively large. 32 ') behavior.

Here, the behavior control unit 40 'is a relatively large width of the connection neck portion 36', mainly to maintain the spring constant K value appropriately. As another example of the behavior control unit 40 ', the spring constant K may be adjusted by adjusting the thickness of the connection neck 36'.

Hereinafter, the operation of the valve device of the hermetic compressor according to the present invention as described above will be described.

First, in the embodiment shown in FIG. 5, the discharge valve 30 has its fixing portion 34 fixed by the pressing end 52 of the retainer 50, and the opening and closing portion 32 of the discharge valve 30 has a valve plate 20. It is in the position corresponding to the discharge port 24 of the.

And the behavior control unit 40 is formed integrally extended from the opening and closing portion 32 is to be controlled by one side of the lower surface of the retainer 50 to control the behavior of the opening and closing portion (32).

In this state, when the compression is performed in the compression chamber and the pressure inside the compression chamber is relatively larger than the inside of the seating groove 22, the opening / closing portion 32 of the discharge valve 30 is separated from the valve seat 26. While opening the discharge port 24. When the pressure inside the compression chamber becomes relatively small, the opening and closing portion 32 of the discharge valve 30 comes into close contact with the valve seat 26 to close the discharge port 24.

On the other hand, when the discharge valve 30 opens the discharge port 24, the behavior control unit 40 controls so that the opening and closing portion 32 is not too open. That is, when the behavior control unit 40 is lifted together while the opening and closing part 32 is opened, the retainer 50 is closed on one side of the retainer 50 to provide an elastic force in a direction in which the discharge valve 30 is closed. .

Therefore, the discharge valve 30 is operated such that the opening and closing portion 32 is in close contact with the valve seat 26 by the elastic force provided by the behavior control unit 40 as well as the pressure inside the compression chamber.

In addition, in the embodiment illustrated in FIG. 6, the behavior control unit 40 ′ integrally formed with the connection neck part 36 ′ of the discharge valve 30 ′ controls the behavior of the opening and closing part 32 ′. In this embodiment, the behavior control unit 40 ′ sets the spring constant K of the discharge valve 30 ′ to control the opening and closing part 32 ′ of opening and closing the discharge port 24.

The spring constant K value is determined by forming the behavior control part 40 'in the connecting neck part 36'. That is, the spring constant can be adjusted by increasing the width of the connecting neck portion 36 'or setting the thickness appropriately.

The discharge valve device of the hermetic compressor according to the present invention as described in detail above allows the behavior control unit formed integrally with the discharge valve to perform the role of the conventional valve spring to minimize the number of components of the entire discharge valve device. have.

Therefore, according to the present invention, as the total number of parts of the discharge valve device is reduced, the assembling work is easy, and there is little fear of missing parts during assembly, and the manufacturing cost is reduced.

Claims (5)

A valve plate having suction holes and discharge holes communicating with the inside of the compression chamber, A discharge valve having one end fixed to the valve plate and a free end opening and closing the discharge hole; A behavior control unit integrally formed with the discharge valve and controlling the behavior of the discharge valve; Discharge valve device of the hermetic compressor characterized in that it comprises a fixture for fixing the discharge valve to the valve plate. The method of claim 1, wherein the discharge valve, An opening and closing part for opening and closing the discharge hole; A fixed part fixed to the valve plate by the fastener; A connecting neck part connecting the opening and closing part and the fixing part; Discharge valve device of the hermetic compressor, characterized in that it comprises a behavior control unit which is integrally formed at the tip of the opening and closing part to control the behavior of the opening and closing part. The method of claim 1, wherein the discharge valve, An opening and closing part for opening and closing the discharge hole; A fixed part fixed to the valve plate by the fastener; A connecting neck part connecting the opening and closing part and the fixing part; Discharge valve device of the hermetic compressor, characterized in that it is formed integrally with the connecting neck portion and comprises a behavior control unit for controlling the behavior of the opening and closing portion. 4. The discharge valve apparatus according to any one of claims 1 to 3, wherein the fixture is a retainer. 4. The discharge valve apparatus according to any one of claims 1 to 3, wherein the fixture is a head cover.