KR100309289B1 - Wankel compressor without discharge valve - Google Patents

Abstract

The present invention relates to a non-discharge valve vankel compressor without a discharge valve, and in particular, a separation plate for removing the discharge valve installed in the discharge port of the cylinder and separating the compression chamber and the suction chamber while always contacting the piston by elastic force behind the discharge port is installed and vibrated. And it relates to a non-emission valve Vankel compressor that can reduce the noise and at the same time improve the compression efficiency.

The present invention for achieving the above object is a case formed with a suction port and a discharge port, a drive unit installed to provide power to the inside of the case, the shaft connected to the drive unit and rotated, a plurality of protrusions connected to the eccentric with the shaft And a cylinder having a suction port and a discharge port formed therein to compress the fluid sucked according to the rotation of the piston, and a separation plate installed to separate the compression chamber and the suction chamber behind the discharge port of the cylinder based on the rotation direction of the piston. It characterized in that it comprises an elastic means for providing an elastic force so that the separator plate is always in contact with the piston.

Description

Wankel compressor without discharge valve {Wankel compressor without discharge valve}

The present invention relates to a non-discharge valve vankel compressor without a discharge valve, and in particular, a separation plate for removing the discharge valve installed in the discharge port of the cylinder and separating the compression chamber and the suction chamber while always contacting the piston by elastic force behind the discharge port is installed and vibrated. And it relates to a non-emission valve Vankel compressor that can reduce the noise and at the same time improve the compression efficiency.

In general, an air conditioner is provided with a compressor for compressing a refrigerant. The compressor may be divided into various types according to its configuration and operation. A wankel compressor is a compressor in which a plurality of protrusions are formed on a piston installed to be eccentric with an axis connected to a driving unit, and the compressor compresses refrigerant while trajectory movement is performed along a cylinder inner surface consisting of a trochoid or an epitrochoid curved surface. Is called. Here, the vankel compressor has vibration and noise generated because the piston is installed eccentrically with the shaft, and the suction and discharge of the refrigerant proceed in the cylinder, and the suction and discharge of the refrigerant is caused by the rotation of the piston and the positions of the suction and discharge ports. The compression efficiency changes accordingly. Therefore, it is a trend to develop a Vankel compressor that can reduce the vibration and noise and at the same time improve the compression efficiency.

1 is an operation diagram of a vankel compressor according to the prior art.

In the conventional Vankel compressor, as shown in FIG. 1, compression is performed while the piston 2 installed to be eccentric with the shaft 3 connected to the driving unit rotates along the inner surface of the cylinder 1. Here, three lobes 2a are formed in the piston 2, two inlets 1a and two outlets 1b are formed in the cylinder 1, and the outlets 1b are formed. ) Is provided with a discharge valve 4 so that the refrigerant compressed through the discharge port 1b can be discharged at a predetermined pressure or more. In addition, unlike in FIG. 1, one suction port and one discharge port may be formed.

In the above, when the drive unit is driven to rotate the shaft 3 in the clockwise direction, the piston (2) is rotated in contact with the inner wall of the cylinder (1), as shown in (a) of FIG. As described above, the low pressure refrigerant is sucked into the cylinder 1 through the suction port 1a, and the volume between the piston 2 and the inner wall of the cylinder 1 is maximized, so that suction is completed. 1 (b) shows a process in which the piston 2 rotates a bit more to perform compression, and as the piston 2 rotates, the piston 2 and the cylinder 1 inner wall. The refrigerant is compressed while the volume between them is reduced. When the piston 2 is rotated as shown in (c) of FIG. 1, the refrigerant is further compressed. At this time, when the refrigerant is compressed to a predetermined ratio or more, the discharge valve 4 is opened and compressed. The coolant is discharged through the discharge port 1b. Figure 1 (d) is a view showing a complete discharge, the low pressure refrigerant is sucked again through the suction port (1a).

That is, the compression is achieved by continuously repeating the above suction and discharge.

However, in the conventional vankel compressor, as shown in (d) of FIG. 1, even when the compressed refrigerant is discharged, a considerable amount of compressed refrigerant remains in the discharge valve 4, and the cylinder 1 It is the space between the inner surface and the piston 2 and the volume of the discharge passage. Here, the remaining compressed refrigerant expands in the suction chamber when the piston 2 rotates to suck in the new low pressure refrigerant, so that the suction refrigerant is not sufficiently sucked into the suction chamber, and thus the refrigerant mass flow rate is reduced, thereby reducing the capacity of the whole system. There is a problem.

In addition, the conventional vankel compressor has a problem that the overcompression phenomenon occurs by the discharge valve (4). That is, since the discharge valve 4 is installed, in order for the compressed refrigerant to be discharged to the outside, it must be higher than the external pressure and must reach a pressure at which the discharge valve 4 can be opened. Therefore, in the case of the Vankel compressor having the discharge valve 4, the compression ratio for opening the discharge valve 4 must be calculated, so that additional work is performed, which causes a loss due to overcompression.

The present invention has been made to solve the above-mentioned problems of the prior art, the discharge valve installed in the discharge port of the cylinder is eliminated, so as to be in contact with the piston always by the elastic force behind the discharge port of the cylinder based on the rotation direction of the piston It is an object of the present invention to provide a non-return valve Vankel compressor that can improve compression efficiency while reducing vibration and noise by installing a plate to divide the compression chamber and the suction chamber.

1 is an operation of the vankel compressor according to the prior art,

2 is a cross-sectional view of a non-return valve vankel compressor according to a first embodiment of the present invention;

3 is a cross-sectional view of a cylinder which is a part of a vankel compressor according to a first embodiment of the present invention;

4 is an operation of the vankel compressor according to the first embodiment of the present invention;

5 is a graph comparing the overcompression loss of the compressor according to the first embodiment of the present invention and the conventional compressor.

6 is an operation of a vankel compressor according to a second embodiment of the present invention;

7 is an operation of a vankel compressor according to a third embodiment of the present invention.

<Explanation of symbols on main parts of the drawings>

50: case 51: stator 52: rotor

53 shaft 54 upper bearing 55 lower bearing

56, 60, 70: cylinder 57, 61, 71: piston 58, 62, 72: separation plate

59,63,73: spring

The present invention provides a case in which a suction port and a discharge port are formed, a driving unit installed to provide power to the inside of the case, an axis connected to the driving unit to rotate, a piston connected to the shaft and eccentrically formed, and the piston; A cylinder having a suction port and a discharge port formed to compress the fluid sucked according to rotation of the cylinder, a separation plate installed to separate the compression chamber and the suction chamber from the rear of the discharge port of the cylinder based on the rotation direction of the piston, and the separation plate is always the piston It characterized in that it comprises an elastic means for providing an elastic force to contact.

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

2 is a cross-sectional view of a non-return valve vankel compressor according to a first embodiment of the present invention, and FIG. 3 is a cross-sectional view of a cylinder that is a part of the vankel compressor according to the first embodiment of the present invention. 4 is an operation of the vankel compressor according to the first embodiment of the present invention, Figure 5 is a graph comparing the overcompression loss of the compressor according to the first embodiment of the present invention and the compressor according to the prior art, Figure 6 Fig. 7 is an operation diagram of the vankel compressor according to the second embodiment of the present invention. Fig. 7 is an operation diagram of the vankel compressor according to the third embodiment of the present invention.

As shown in FIGS. 2 to 4, the non-emission valve Vankel compressor according to the first embodiment of the present invention has a suction port 50b through which a low pressure refrigerant is sucked from the accumulator 60 and a discharge port through which the sucked refrigerant is compressed and discharged. A case 50 having a 50a formed therein, a stator 51 fixed inside the case 50 to transmit driving force, and installed inside the stator 51 and rotated by electromagnetic force when power is supplied. A rotor 52, a shaft 53 press-fitted to a central portion of the rotor 52 and rotated together with the rotor 52, and eccentrically installed at a lower portion of the shaft 53; Piston 57 for compressing the low-pressure refrigerant sucked into the suction port (50b) of the case 50, and a cylinder chamber is formed so that the refrigerant can be compressed by the rotation of the piston 57 and the suction inlet ( Cylinder 56 with a 56a and a discharge port 56b discharged The separation plate 58 is installed to always contact the outside of the piston 57 so that the compression chamber and the suction chamber are separated behind the discharge port 56b of the cylinder 56 based on the rotational direction of the piston 57. And a spring 59, which is an elastic means for providing an elastic force so that the separating plate 58 contacts the piston 57, and upper and lower bearings installed to surround the shaft 53 at upper and lower portions of the cylinder 56. 54,55).

Here, the piston 57 has three protrusions 57a formed therein, and two cylinders 56 have two suction ports 56a and discharge ports 56b. In addition, the suction port 56a of the cylinder 56 may be machined at the radial side of the cylinder 56 or may be machined at the upper and lower bearings 54 and 55 as shown in FIG. 3.

Referring to the operation of the non-emission valve Vankel compressor of the first embodiment according to the present invention configured as described above are as follows.

First, when power is applied to the compressor in FIG. 2, the rotor 52 is rotated by the electromagnetic force with the stator 51, and the shaft 53 is also rotated together with the rotor 52. Accordingly, as the piston 57 connected to the shaft 53 rotates in the cylinder 56, the refrigerant is sucked into the cylinder 56 and compressed to be discharged toward the discharge port 50a of the case 50. At this time, the separation plate 58 maintains a state of always in contact with the piston 57 to separate the suction chamber and the compression chamber of the refrigerant.

That is, in detail with reference to the operation diagram shown in Figure 4, Figure 4 (a) is one of the three projections (56a) formed in the piston 57, one projection 56a is the separation plate 58 ) And the suction is completed because the X is filled with refrigerant. Here, when the piston 57 rotates in the counterclockwise direction, it is in a state as shown in FIG. 4 (b). In this state, the volume of X is reduced by the rotation of the piston 57, and the The refrigerant is in a state of starting to compress. In addition, as shown in (c) of FIG. 4, as the piston 57 further rotates, the volume of the X portion is further reduced, and the compression of the refrigerant continues, and FIG. 4 (d) illustrates the piston 57. ) Is a state where the projection 57a of the () is in contact with the discharge port 56a of the cylinder 56 and the compression is completed.

When the piston 57 is rotated in the state of FIG. 4D, the piston 57 is in the same state as in FIG. 4E. In this state, the compressed refrigerant in the X part is discharged 56b of the cylinder 56. Discharge is started. 4F is a state in which the compressed refrigerant is continuously discharged while the piston 57 is rotated. Here, as shown in (e) and (f) of FIG. 4, since the separating plate 58 is in contact with the piston 57 until all of the compressed refrigerant is discharged, the inlet port of the cylinder 57 Through 56a), the refrigerant sucked in and the refrigerant discharged are completely separated. That is, the compression chamber and the suction chamber of the refrigerant are completely separated.

4 (g) shows a state similar to that of FIG. 4 (a), where the coolant in the X part is almost discharged, and the suction of the coolant in the X 'part is completed again.

If the piston 57 is continuously rotated as described above, suction and discharge occur continuously in two places to compress and discharge the refrigerant.

On the other hand, in the non-emission valve Vankel compressor according to the second embodiment of the present invention, as shown in FIG. 6, the piston 61 in which two protrusions 61a are formed is rotated in the cylinder 60 along a clockwise direction. As a structure in which the refrigerant is compressed, FIG. 6A illustrates a state in which a low pressure refrigerant is sucked into the Y portion through the suction port 60a formed in the cylinder 60, and FIG. The suction is completed, and FIGS. 6 (c) and 6 (d) show a state in which compression proceeds while the volume of the Y portion is reduced by the rotation of the piston 61, and FIG. 6 e shows the piston ( The volume of the Y portion is reduced to the minimum by the rotation of 61, and the compression is completed, and FIG. 6 (f) is a state in which the refrigerant compressed in the Y portion is discharged through the discharge port 60b of the cylinder 60. . Here, when the piston 61 rotates a little more in the state of FIG. 6 (f), the piston 61 has a shape as shown in FIG. 6 (a), wherein the Y 'portion is the same as the Y portion of FIG. Is inhaled.

And, based on the rotation direction of the piston 61, the separation plate 62, which is provided with an elastic force by the spring 63, is installed at the rear of the discharge port 60b of the piston 61, as in the first embodiment. Thus, the compression chamber and the suction chamber are separated.

Meanwhile, in the vankel compressor according to the third embodiment of the present invention, as shown in FIG. 7, four protrusions 71a are formed on the piston 71, and the piston 71 has three suction ports 70a and discharge ports ( It is configured to suck and compress the refrigerant while rotating in the clockwise direction in the cylinder 70 in which the 70b) is formed.

That is, Figure 7 (a) is a state in which the suction of the refrigerant is completed in the Z portion through the inlet port 70a of the cylinder 70, the compression is started, Figure 7 (b) is the piston 71 is As the volume of the Z portion decreases as it rotates, the refrigerant is compressed. As the piston 71 rotates a little more, the compressed refrigerant of the Z portion is discharged through the discharge port 70b. Of course, as with the first and second embodiments, the piston 71 is always driven by the elastic force of the spring 73 at the rear of the discharge port 70b of the cylinder 70 when the rotational direction of the piston 71 is used as a reference. A separator plate 72 is provided to be in contact with each other and separates the compression chamber and the suction chamber of the refrigerant.

As described above, the non-emission valve Vankel compressor according to the present invention is not provided with a discharge valve, thereby improving the overcompression loss caused by the discharge valve and providing an effect of reducing vibration and noise. In addition, the separation plates 58, 62, and 72 may be installed to eliminate dead volume inside the cylinder, thereby providing an effect of eliminating re-expansion loss that prevents suction of the refrigerant.

Claims (1)

A case having a suction port and a discharge port formed therein, a drive unit installed to provide power to the inside of the case, an axis connected to the drive unit to rotate, a piston connected to the axis and eccentrically formed, and a plurality of protrusions formed on the rotation of the piston. The suction port and the discharge port are formed to compress the suction fluid, a separation plate installed to separate the compression chamber and the suction chamber behind the discharge port of the cylinder based on the rotational direction of the piston, and the separation plate is in contact with the piston at all times. Non-return valve Vankel compressor, characterized in that it comprises an elastic means for providing an elastic force.