JP3011714B2 - Compressor discharge valve assembly - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compact compressor used for a refrigerator, an air conditioner and the like, and more particularly, to a discharge valve assembly for opening and closing a discharge port.

[0002]

2. Description of the Related Art Generally, a compressor used for a refrigerator, an air conditioner, or the like is, as shown in FIG.
0 has a structure in which a motor 20 and a cylinder assembly 30 are provided.

The motor 20 includes a stator 21 and a rotor 22. The stator 21 is pushed into the container 10, and the rotor 22 is fixed to the eccentric shaft 23. The eccentric shaft 23 transmits the rotational force of the motor 20 to the cylinder assembly 30.
To communicate.

The cylinder assembly 30 includes upper and lower flanges 31 and 32 for supporting the eccentric shaft 23 and a cylinder 33 and an eccentric shaft 23 provided between the upper and lower flanges 31 and 32 to form a predetermined internal space. And a roller 34 rotated by the eccentric shaft 23.

The upper flange 31 has a discharge port 31a for discharging the refrigerant compressed in the internal space of the cylinder 33 to the discharge space 10a inside the container.
A discharge valve assembly 40 for opening and closing the valve is provided.

The discharge valve assembly 40 comprises a discharge valve 41 for opening and closing the discharge port 31a, and a valve stopper 42 for limiting the upward movement width of the discharge valve 41. For reference, in FIG. 3, reference numeral 44 denotes a rivet for fixing the discharge valve 41 and the valve stopper 42 to the upper flange 31.
Reference numeral 11 denotes a discharge pipe.

When the rotational force of the motor 20 is transmitted to the roller 34 through the eccentric shaft 23, the roller 34 rotates and revolves in the internal space of the cylinder 33. Accordingly, the refrigerant is sucked into the internal space of the cylinder 33 and compressed, and then discharged through the discharge valve 41 and the muffler 36 into the discharge space 10a. The discharged refrigerant is transferred to an external device such as a condenser (not shown) of the air conditioner through the discharge pipe 11.

However, the conventional compressor discharge valve assembly 40 has the following problems. When the discharge valve 41 opens and the compressed refrigerant is discharged, the discharge valve 40 hits the valve stopper 42. Such a phenomenon is periodically generated when the compressor is operated, and is a main noise source of the compressor.

When the discharge valve 41 hits the valve stopper 42, the discharge valve 41 comes into close contact with the lower surface of the valve stopper 42. This way,
After the end of the compression action, the discharge valve 41 closes due to the pressure difference between the pressure inside the cylinder and the discharge space 10a, and there is almost no pressure difference on both sides of the discharge valve 41.
The time for 1 to be removed from valve stop 42 is delayed. Accordingly, a phenomenon occurs in which the discharged gas refrigerant flows back into the internal space of the cylinder 33, and there is a problem that the performance of the compressor is reduced.

[0010]

SUMMARY OF THE INVENTION It is an object of the present invention to reduce the impact and noise generated when a discharge valve strikes a valve stopper. It is another object of the present invention to improve the performance of the compressor by closing the discharge port to prevent the refrigerant from flowing backward by moving the discharge valve away from the valve stopper quickly.

[0011]

In order to achieve the above object, a compressor discharge valve assembly according to the present invention comprises a free end for opening and closing a discharge port, and an upper surface of an upper flange formed with the discharge port. A discharge valve having a fixed end fixed to one side of the valve, a valve stopper for restricting the vertical movement range of the free end of the discharge valve, and a buffer stopper having a gas retaining groove superimposed on the lower surface of the valve stopper. It is characterized by the following.

According to the present invention, when the compressed refrigerant is discharged and the discharge valve is opened by the pressure, the refrigerant gas filled in the gas holding groove of the buffer stopper serves as a cushion. Therefore, the impact of the discharge valve striking the buffer stopper and the accompanying noise are greatly reduced.

When the pressure inside the cylinder becomes lower than the pressure in the discharge space and the discharge valve closes after the end of the compression action, the discharge valve is closed by the pressure of the refrigerant gas filled in the gas holding groove of the buffer stopper. It will close quickly. Therefore,
The discharged refrigerant is prevented from flowing back into the cylinder again through the discharge port.

[0014]

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. A discharge valve assembly according to the present invention is shown in FIGS. FIG. 4 shows a hermetic rotary compressor provided with a discharge valve assembly 140 according to the present invention. It is the same as the prior art. 4 to 7 are similar to FIGS. 1 and 3, and are denoted by reference numerals obtained by adding 100 to the conventional reference numerals.

As shown, the discharge valve assembly 140 according to the present invention includes the discharge valve 141, the valve stopper 142, and the buffer stopper 143 provided therebetween, and is preferably made of metal. These discharge valves 141,
Each of the valve stopper 142 and the buffer stopper 143 has its fixed end fixed by a fixing means such as a rivet 144.
It is fixed to one side of the upper surface of the upper flange 131 on which the 31a is formed.

The discharge valve 141 has a discharge port 131 at its free end.
The discharge port 131a is placed on the upper surface of the upper flange 131 so as to close the opening a, and the discharge port 131a is opened by the pressure of the compressed refrigerant.

The buffer stopper 143 is permanently connected to the lower surface of the valve stopper 142. Each of the valve stopper 142 and the buffer stopper 143 is a substantially rectangular plate, and their free ends are located above the discharge port 131a opened and closed by the free end of the discharge valve 141 by a predetermined height.

The buffer stopper 143 is connected to the discharge valve 14
1 and has a gas holding groove 143a extending in the longitudinal direction thereof and opening toward the discharge valve 141. As will be described later, the valve stopper 142 and the buffer stopper 143 constitute a device that buffers the impact of the discharge valve 141 during the valve opening operation, and promotes the operation of closing the valve.

The operation of the discharge valve assembly 140 according to the present invention having such a configuration is as follows. When the compressed refrigerant is discharged through the discharge port 131a, the discharge valve 141
Will hit the upper buffer stopper 143 while elastically bending upward due to the pressure of the compressed refrigerant. At this time, the inside of the gas holding groove 143a of the buffer stopper 143 is in a state of being filled with gas. Buffer stopper 1
The gas filled in the gas holding groove 143a of the 43
When 41 strikes the buffer stopper 143, it acts as a kind of cushion, and reduces the shock applied from the discharge valve 141 to the buffer stopper 143. Therefore, the discharge valve 1
The noise generated by the impact of the shock absorber 41 and the buffer stopper 143 can be reduced.

When all of the compressed refrigerant has been discharged through the discharge port 131a, the discharge valve 14 is discharged due to the pressure difference between the internal space of the cylinder 133 and the discharge space 110a.
1 will be closed. The pressure in the internal space of the cylinder 133 communicated with the discharge port 131a is lower than the pressure in the discharge space 110a. At this time, since the gas is filled in the gas holding groove 143a, a pressure difference is generated on both surfaces of the discharge valve 141, and the discharge valve 141 is detached from the buffer stopper 143 so quickly. Therefore, it is possible to prevent the refrigerant discharged into the discharge space 110a from flowing back to the internal space of the cylinder 133 through the discharge port 131a. The buffer stopper 143 may be fixed below the valve stopper 142.

[0021]

As described above, according to the present invention, the buffer stopper having the gas retaining groove is provided between the discharge valve and the valve stopper. Therefore, when the discharge valve is opened while the compressed gas is being discharged, the gas filled in the gas retaining groove of the buffer stopper serves as a cushion, so that the impact of the discharge valve hitting the buffer stopper is reduced and noise is greatly reduced. There are advantages to be. When the pressure in the internal space of the cylinder becomes lower than the discharge space after the end of the compression action, the discharge valve closes quickly due to the pressure of the gas filled in the gas holding groove. Therefore, the discharged refrigerant is prevented from flowing back into the cylinder through the discharge port, thereby improving the performance of the compressor.

Although a specific preferred embodiment of the present invention has been shown and described above, the present invention is not limited to the above-described embodiment, and does not depart from the gist of the present invention as set forth in the appended claims. Various modifications can be made by anyone having ordinary knowledge in the field to which this belongs.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a general hermetic rotary compressor.

FIG. 2 is a partially enlarged sectional view of the discharge valve assembly of FIG.

FIG. 3 is an enlarged sectional view of a main part of the discharge valve assembly of FIG. 2;

FIG. 4 is a sectional view showing a hermetic rotary compressor provided with a discharge valve assembly according to the present invention.

FIG. 5 is a partially enlarged sectional view of the discharge valve assembly of FIG.

FIG. 6 is a sectional view showing the discharge valve assembly of FIG. 5;

FIG. 7 is an exploded perspective view of the discharge valve assembly according to the present invention.

[Explanation of symbols]

 110a Discharge space 131 Upper flange 131a Discharge port 133 Cylinder 136 Muffler

Claims (2)

(57) [Claims] 1. A discharge valve having a free end for opening and closing a discharge port, a discharge valve having a fixed end fixed to one side of an upper surface of an upper flange on which the discharge port is formed, and a vertical movement range of the free end of the discharge valve. And a buffer stopper provided on a lower surface of the valve stopper and having a gas retaining groove. 2. The discharge valve assembly for a compressor according to claim 1, wherein one end of the valve stopper and the buffer stopper is fixed integrally with a fixed end of the discharge valve.