KR100360860B1 - Discharge valve apparatus of rotary compressor - Google Patents

Abstract

The present invention relates to a discharge valve device of a rotary compressor, the present invention is installed in the case and the cylinder is formed with a compression space for compressing the refrigerant gas, and the main bearings are installed in close contact with each side of the cylinder so as to support the rotating shaft coupled to the cylinder And a sub bearing, wherein a discharge port for discharging the compressed refrigerant gas from the compression space is formed at one side of the cylinder; At least one of the main bearing and the sub bearing has a valve seat having a container shape having one surface opened, a first discharge hole for communicating the valve seat with the discharge port of the cylinder, and an inner space of the valve seat and the case. A second discharge hole for communicating with each other is formed; The valve seat is operated according to the pressure of the refrigerant gas to open and close the first discharge hole and the second discharge hole to discharge the refrigerant gas through the discharge port, the first discharge hole, the valve seat, and the second discharge hole. By installing the valve means for determining whether to reduce the blow noise and compression loss compared to the structure consisting of the conventional discharge valve and retainer to improve the overall noise characteristics and compression performance of the compressor.

Description

Discharge valve device of rotary compressor {DISCHARGE VALVE APPARATUS OF ROTARY COMPRESSOR}

The present invention relates to a discharge valve device of a rotary compressor for discharging the refrigerant gas compressed in the compression space of the cylinder into the case.

1 is a longitudinal cross-sectional view of a compressor showing a discharge valve device of a rotary compressor according to the prior art, and FIG. 2 is a cross-sectional view showing part A of FIG. 1 in detail.

1 and 2, a conventional rotary compressor includes a case 1 having a predetermined internal volume, an electric mechanism unit installed inside the case 1 to generate a driving force, and a driving force of the electric mechanism unit. Compressor section for compressing the refrigerant gas is received.

In this case, the power mechanism comprises a stator (2) fixedly coupled in the case (1), and a rotor (3) inserted into the stator (2) to rotate.

In addition, the compression mechanism is provided with a rotating shaft (4) press-fitted into the inner diameter of the rotor (3) and the eccentric portion (4a) formed in the lower portion, and a compression space (P) in which gas is sucked and compressed inside the case ( 1) is installed inside the cylinder 5, the eccentric portion 4a of the rotary shaft 4 is inserted into the compression space (P), and inserted into the rotary shaft (4) and the top of the cylinder (5) , The main shaft 7 and the sub-bearing 8 supporting the rotating shaft 4 are coupled to each other by fastening the bolts to the lower portion, and the rotating shaft is in line contact with the inner circumferential surface of the compression space P of the cylinder 5. A rolling piston 9 which is inserted into the core 4a and rotates and revolves in accordance with the rotation of the rotary shaft 4, and is inserted into one side of the cylinder 5 so as to be linearly movable, and an end of the rolling piston 9 A vane (not shown) for dividing the cylinder compression space P into the suction chamber and the compression chamber while sliding contact with the outer circumferential surface It is configured to.

In addition, a discharge port 5a for discharging the compressed refrigerant gas is formed at one side of the cylinder 5, and a discharge hole 7a is formed at one side of the main bearing 7 so as to communicate with the discharge port 5a. Is formed, the upper side of the case 1 is coupled to the discharge tube 10 for discharging the compressed gas to the outside.

In addition, an upper surface of the main bearing 7 has a discharge valve 13 for opening the discharge hole 7a when the refrigerant gas is above a predetermined pressure, and a retainer for limiting and supporting an open state of the discharge valve 13. 14) are joined together.

In addition, the discharge valve 13 and the retainer 14 are fixed to the main bearing 7 by the fastening screw 15, the muffler for reducing the discharge noise of the refrigerant gas on the upper portion of the main bearing (7). The Muffler 16 is closed and joined.

In addition, an inlet 5b is formed at one side of the cylinder 5 to introduce refrigerant gas into the compression space P, and the inlet 5b is connected to an accumulator 20 installed at the side of the case 1. The suction pipe 12 is coupled, and the bottom surface of the case 1 is filled with oil supplied to the sliding element.

The rotary compressor configured as described above is operated as follows.

First, when a current is applied to the rotor 3 of the electric mechanism part, the rotor 3 rotates to rotate the rotating shaft 4, and when the rotating shaft 4 is rotated, the eccentric portion 4a of the rotating shaft 4 is rotated. Rolling piston (9) coupled to the eccentric rotation in the cylinder compression space (P) in contact with the vane.

When the rolling piston 9 is eccentrically rotated, the volume of the cylinder compression space P is changed, and the refrigerant gas of low temperature and low pressure is sucked into the cylinder compression space P through the suction pipe 12 and the suction port 5b, thereby causing high temperature and high pressure. Is compressed to a state of.

When the refrigerant gas compressed in the cylinder 5 is equal to or higher than a predetermined pressure, the discharge valve 13 which is blocking the discharge hole 7a of the main bearing 7 is opened, and the refrigerant gas of the high temperature and high pressure is discharged to the discharge port 5a. And discharge into the case 1 through the discharge hole 7a.

In this case, the opening degree of the discharge valve 13 is limited by the retainer 14, and the refrigerant gas passes through the muffler 16 before being discharged into the case 1 to reduce the discharge noise.

The refrigerant gas discharged into the case (1) is the upper side of the case (1) through a gap formed between the stator (2) and the rotor (3), and between the stator (2) and the case (1), respectively Is moved to.

As described above, the refrigerant gas moved to the upper side of the case 1 is discharged to the outside of the case 1 through the discharge tube 10.

However, the discharge valve device of the rotary compressor according to the related art as described above has a discharge valve 13 and a retainer to open the discharge port 5a and the discharge hole 7a formed in the cylinder 5 and the main bearing 7. (14), the discharge valve 13 hits the retainer 14 when the refrigerant gas is discharged, and the impact noise is generated, as well as the compression loss, the compression efficiency is lowered and at the time of initial start-up The defect is increased, and this causes a problem that the noise characteristics and compression performance of the entire compressor is worse.

In the conventional discharge valve device, the discharge valve 13 and the retainer 14 collide with each other when the refrigerant gas in the cylinder compression space P is discharged into the case 1. ), The durability is weak, and there is a problem that the reliability of the compressor is lowered.

In addition, the conventional discharge valve device as an important component of the compressor acts as an important factor of the reliability that determines the performance, assembly work, price, product life, etc., so that many restrictions on the development of a high-performance compressor having a new compression mechanism. There was a problem.

The object of the present invention devised in view of the problems described above, the rotary compressor to reduce the impact noise and compression loss compared to the conventional structure consisting of the discharge valve and the retainer to improve the overall noise characteristics and compression performance of the compressor To provide a discharge valve device of the.

1 is a longitudinal sectional view of a compressor showing a discharge valve device of a rotary compressor according to the prior art;

2 is a cross-sectional view showing part A of FIG. 1 in detail;

3 is a cross-sectional view showing a discharge valve device of a rotary compressor according to the present invention;

4 is a cross-sectional view showing a state in which refrigerant gas is being discharged by the discharge valve device described above;

5 is a cross-sectional view illustrating a state in which discharge of the refrigerant gas is blocked by the discharge valve device.

<Explanation of symbols for the main parts of the drawings>

51 case 53 cylinder

53a: discharge port 55: rotating shaft

57: main bearing 57a: valve seat

57b: first discharge hole 57c: second discharge hole

59: sub-bearing 60: valve means

61 block type valve member 63 stopper member

63a: discharge hole 65: elastic member

In order to achieve the object of the present invention as described above, the main bearing and the sub-bearings are installed in close contact with each side of the cylinder to support the rotating shaft coupled to the cylinder and the cylinder is installed in the case and the refrigerant gas is compressed; A discharge port for discharging the compressed refrigerant gas from the compression space is formed at one side of the cylinder; At least one of the main bearing and the sub bearing is provided with a valve seat having a container shape having one surface opened, and a first discharge hole for communicating the valve seat with the discharge port of the cylinder; In the discharge valve device of the rotary compressor having a valve means for opening and closing the first discharge hole is provided in the valve seat, the main bearing or sub-bearing in the valve seat and the case on one side of the valve seat A second discharge hole communicating with the space is formed; The valve means is installed so as to be movable up and down in the valve seat portion block type valve member for opening and closing the first discharge hole and the second discharge hole, and the main bearing or to prevent the separation of the block valve member A stopper member fixed to the sub-bearing to support the block valve member, and installed between the block valve member and the stopper member such that the block valve member is returned to its original position after being moved by the pressure of the refrigerant gas; There is provided a discharge valve device of a rotary compressor, characterized in that it is composed of an elastic member for providing an elastic force to the valve member.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

3 is a cross-sectional view showing a discharge valve device of a rotary compressor according to the present invention, Figure 4 is a cross-sectional view showing a state that the refrigerant gas is discharged by the discharge valve device described above, Figure 5 is a discharge valve device described above Is a cross-sectional view showing a state in which discharge of the refrigerant gas is blocked.

3 to 5, the discharge valve device according to the present invention includes a cylinder 53 in which a compression space P ′ in which the refrigerant gas is compressed is installed in the case 51 and in the cylinder 53. Applied to a rotary compressor including a main bearing 57 and a sub-bearing 59 in close contact with each side of the cylinder 53 to support the combined rotating shaft 55, one side of the cylinder 53 is compressed refrigerant A discharge port 53a for discharging gas from the compressed space P 'is formed, and the main bearing 57 has a valve seat 57a having a container shape with one surface open, and the valve seat 57a. And the first discharge hole 57b for communicating the discharge port 53a of the cylinder 53, and the second discharge hole 57c for communicating the side surface of the valve seat 57a and the internal space of the case 51. ) Is formed.

In addition, the valve seating portion 57a is operated according to the pressure of the refrigerant gas to open and close the first discharge hole 57b and the second discharge hole 57c, thereby discharging the discharge port 53a and the first discharge hole ( 57b), the valve seat portion 57a, and the valve means 60 for determining whether to discharge the refrigerant gas through the second discharge hole (57c) is provided.

Here, the valve means 60 is installed in the valve seat portion (57a) so as to move linearly in accordance with the pressure of the refrigerant gas block valve for opening and closing the first discharge hole (57b) and the second discharge hole (57c) A member 61, a stopper member 63 fixed to the main bearing 57 to support the block valve member 61 to prevent separation of the block valve member 61, and the block valve member An elastic member installed between the 61 and the stopper member 63 to provide an elastic force to the block valve member 61 so that the block valve member 61 is moved back to its original position after being moved by the pressure of the refrigerant gas. It consists of 65.

In addition, the block valve member 61 may be formed in a variety of forms, such as a square column, a triangular column, a cylinder, it is most preferably formed in the form of a double cylinder.

In addition, the stopper member 63 is provided with a plurality of discharge holes 63a for discharging the refrigerant gas.

In addition, the stopper member 63 is fastened to the main bearing 57 by fixing screws 67 and 68, and a compression spring is typically used for the elastic member 65.

In addition, according to another embodiment not shown in the drawings, the discharge valve device according to the present invention may be installed in the sub-bearing (59) instead of the main bearing (57).

The discharge valve device of the rotary compressor according to the present invention configured as described above is operated as follows.

First, when the rotating shaft 55 is rotated by the electric mechanism part to change the volume of the compression space P ′ of the cylinder 53, the low-temperature low-pressure refrigerant gas is compressed through the suction pipe coupled to the side of the case 51. It is sucked into the space P 'and compressed to a state of high temperature and high pressure.

As described above, when the refrigerant gas compressed in the cylinder 53 becomes greater than or equal to a predetermined pressure and the pressure of the refrigerant gas is greater than the elastic force of the elastic member 65 pushing the block valve member 61, the main bearing ( The block valve member 61 which blocked the 1st discharge hole 57b and the 2nd discharge hole 57c of 57 is moved upward along the valve seat part 57a.

Thereafter, when the first discharge hole 57b and the second discharge hole 57c are opened by the linear movement of the block valve member 61, the discharge port 53a, the first discharge hole 57b, and the valve seat The refrigerant gas having a high temperature and high pressure is discharged from the compression space P ′ of the cylinder 53 to the internal space of the case 51 through the portion 57a and the second discharge hole 57c.

At this time, a part of the refrigerant gas moved to the valve seating portion 57a through the discharge port 53a and the first discharge hole 57b of the case 51 through the discharge hole 63a of the stopper member 63. It may be discharged into the inner space.

In addition, the coolant gas passes through the discharge port 53a, the first discharge hole 57b, the valve seating portion 57a, and the second discharge hole 57c in order to reduce the discharge noise.

That is, the discharge flow path structure composed of the discharge port 53a, the first discharge hole 57b, the valve seating part 57a, and the second discharge hole 57c performs a muffler function by itself.

When the refrigerant gas of a predetermined pressure or more is discharged into the case 51 from the compression space P 'of the cylinder 53 as described above, the refrigerant gas is sucked into the compression space P' again through a suction pipe and thus the low pressure state is maintained. When the pressure inside the cylinder 53 is lower than the pressure inside the case 51, the block-type valve member 61 is lowered along the valve seat 57a again as shown in FIG. 5. The first discharge hole 57b and the second discharge hole 57c are blocked.

Thereafter, the refrigerant gas discharged into the case 51 is moved to the upper side of the case 51 and then discharged to the outside of the case 51 through a discharge tube coupled to the upper end of the case 51. Thereafter, the above process is repeated.

As described above, in the discharge valve device of the rotary compressor according to the present invention, the abnormal noise due to the vibration of the discharge valve generated in the conventional structure consisting of the discharge valve and the retainer and the blow noise due to the opening and closing of the discharge valve are removed. There is an advantage that the operating noise is greatly reduced.

In addition, the present invention is possible to open and close the block valve member 61 at a constant discharge pressure even during the initial startup of the compressor to minimize the compression loss and mechanical loss generated during the intake / discharge cycle of the refrigerant gas, thereby There is an advantage of improved operating performance and reliability.

In addition, the present invention is a muffler function as the refrigerant gas passes through the discharge port 53a, the first discharge hole (57b), the valve seat portion (57a), the second discharge hole (57c) during the discharge of the refrigerant gas Since it is performed, there is no need to provide a muffler for reducing the discharge noise, thereby reducing the number of assembly labor and the number of parts of the compressor, thereby improving the assembly workability of the compressor and reducing the manufacturing cost.

Claims (3)

And a main bearing and a sub-bearing, which are installed in a case and have a compression space in which a refrigerant gas is compressed, and main bearings and sub-bearings, which are installed in close contact with both sides of the cylinder to support a rotating shaft coupled to the cylinder. A discharge port for discharging the air from the compressed space is formed; At least one of the main bearing and the sub bearing is provided with a valve seat having a container shape having one surface opened, and a first discharge hole for communicating the valve seat with the discharge port of the cylinder; In the discharge valve device of the rotary compressor provided with the valve means for opening and closing the first discharge hole in the valve seating portion, A second discharge hole is formed in the main bearing or the sub bearing to communicate the valve seat and the inner space of the case at one side of the valve seat; The valve means is installed so as to be movable up and down in the valve seat portion block type valve member for opening and closing the first discharge hole and the second discharge hole, and the main bearing or to prevent the separation of the block valve member A stopper member fixed to the sub-bearing to support the block valve member, and installed between the block valve member and the stopper member such that the block valve member is returned to its original position after being moved by the pressure of the refrigerant gas; Discharge valve device of a rotary compressor, characterized in that composed of an elastic member for providing an elastic force to the valve member. delete The method of claim 1, And a plurality of discharge holes for discharging the refrigerant gas in the stopper member.