KR100414084B1 - Structure for loop pipe of reciprocating compressor - Google Patents

Abstract

The present invention relates to a loop pipe structure of a reciprocating compressor, and the present invention relates to a reciprocating compressor in which a piston of a compression unit is coupled to a mover of a reciprocating motor in a closed container to reciprocate linearly together. At least two spiral sections which are turned at least once in the vertical direction with respect to the movement direction of the compression unit to communicate between the discharge side of the sealed container and the discharge port of the sealed container, with a straight section between the spiral sections, the same central axis At least two spiral portions formed at or wound at least once in a direction perpendicular to the direction of movement of the piston, each having a straight portion between the spiral portions and being substantially parallel with a predetermined distance between the central axes. At least two spirals arranged or turned one or more times in the direction of movement of the piston By providing at least two, but the spiral portion is formed approximately parallel with a certain distance between the central axis, the compressor vibration is damped in the spiral portion to reduce the vibration noise of the compressor, through which the compressor and the refrigeration system of the compressor Reliability can be improved. In addition, it is possible to reduce the pressure loss in the loop pipe by shortening the length of the loop pipe, thereby increasing the compressor performance and increasing the compressor efficiency by reducing the suction loss due to overheating of the suction gas in the sealed container.

Description

STRUCTURE FOR LOOP PIPE OF RECIPROCATING COMPRESSOR}

The present invention relates to a loop pipe structure of a reciprocating compressor, and more particularly, to a loop pipe structure of a reciprocating compressor capable of smoothly damping vibrations of a compression unit using a loop pipe.

In general, the reciprocating compressor converts the rotational motion of the drive motor into a reciprocating motion of the piston to suck and discharge gas, and the driving motor reciprocates the piston while reciprocating in a straight line to suck and discharge the gas. It can be largely divided in a manner.

1 is a longitudinal sectional view showing an example of a reciprocating compressor in which a drive motor reciprocates in a straight line.

As shown in the related art, the conventional reciprocating compressor includes a hermetically sealed container 10 through which a suction pipe SP and a discharge tube DP communicate, a reciprocating motor 20 fixed inside the hermetically sealed container 10, A compression unit (30) installed inside the sealed container (10) for sucking and compressing and discharging gas, a frame unit (40) which is elastically supported by being coupled to the reciprocating motor (20) and the compression unit (30); It consists of a spring unit 50 which elastically supports the mover 22 of the reciprocating motor 20 in the movement direction to induce resonance.

The reciprocating motor 20 is interposed in the air gap between the stator 21 made of the inner stator 21A and the outer stator 21B, and the inner stator 21A and the outer stator 21B. It consists of a mover 22 to reciprocate.

The compression unit 30 is coupled to the mover 22 of the reciprocating motor 20 to reciprocate together and the piston 31 is fixed to the frame unit 40 so that the piston 31 is slidably compressed. A cylinder 32 forming a space, a suction valve 33 mounted on the front end surface of the piston 31 to limit the intake of refrigerant gas, and a discharge valve mounted on the front end surface of the cylinder 32 to restrict the discharge of the compressed gas. It consists of a discharge valve assembly 34.

The discharge valve assembly 34 includes a discharge cover 34A having a discharge space for mounting the front end surface of the cylinder 32 and a discharge cover 34A for opening and closing the compressed space while being detached from the front end surface of the cylinder 32. ) And a discharge valve 34B disposed inside the valve, and a valve spring 34C disposed so that both ends are supported by the discharge cover 34A and the discharge valve 34B.

The discharge space of the discharge cover 34A has a discharge hole (unsigned), and the discharge hole communicates with the discharge pipe DP of the sealed container 10 by a loop pipe RP.

The frame unit 40 is supported by a plurality of compression coil springs (not shown) on the bottom surface of the airtight container 10 to elastically support the reciprocating motor 20 and the compression unit 30 together. The front frame 41 supports the stator 21 of the reciprocating motor 20 and the cylinder 32 is inserted and coupled thereto, and the intermediate frame 42 which contacts and supports the rear side of the stator 21. The rear frame 43 is coupled to the intermediate frame 42 and supports the rear side spring 52 to be described later.

The spring unit 50 is a front side spring 51 whose both ends are supported on the inner side of the front frame 41 and the engaging portion of the mover 22 and the piston 31 of the reciprocating motor 20, respectively. And an outer spring 52 whose both ends are supported on the rear surface of the engaging portion of the mover 22 and the piston 31 and the front surface of the rear frame 43 corresponding thereto.

In the figure, reference numeral 31a denotes a gas flow path.

The conventional reciprocating compressor as described above is operated as follows.

That is, when power is applied to the reciprocating motor 20 to form a flux between the inner stator 21A and the outer stator 21B, the flux placed between the inner stator 21A and the outer stator 21B is placed in the gap. The mover 22 moves together with the piston 31 in the direction of the flux and reciprocates in a straight line by the spring unit 50 elastically supported on both sides thereof, and the piston 31 moves inside the cylinder 32. While reciprocating in a straight line to generate a pressure difference in the compression space of the cylinder 32, the refrigerant gas is sucked into the compression space of the cylinder 32 through the gas flow path 31a of the piston 31, The refrigerant gas filled in the compression space of 32 is compressed to a predetermined pressure and then discharged through the discharge valve assembly 34 and the loop pipe RP.

At this time, the compression unit 30 vibrates in the horizontal direction while the piston 31 reciprocates, and the vibration is attenuated to some extent while passing through the loop pipe RP connected to the discharge valve assembly 34 to close the container. Was to communicate outside of (10).

However, in the conventional reciprocating compressor as described above, the vibration generated in the compression unit 30 is not sufficiently attenuated in the loop pipe RP, and residual vibration remains and is transmitted to the outside of the compressor, and the residual vibration is transmitted to the associated parts. There is a problem in that reliability of the entire refrigeration system is deteriorated by causing noise to be transmitted. In addition, in the case of extending the length of the loop pipe RF, the compressor is enlarged and compressed due to the loop pipe RF. The discharge path of the gas is increased to cause a pressure loss, and the compressor performance is lowered. Meanwhile, the temperature inside the sealed container 10 is increased to increase the specific volume of the suction gas.

The present invention has been made in view of the problems of the conventional reciprocating compressor as described above, to provide a loop pipe structure of the reciprocating compressor that can smoothly attenuate the vibration generated in the compression unit by using a loop pipe. Another object of the present invention is to provide a loop pipe structure of a reciprocating compressor capable of minimizing the length of the loop pipe while maximizing the vibration absorption effect to reduce the pressure loss of the compressed gas and the suction loss of the suction gas.

1 is a longitudinal sectional view showing an example of a conventional reciprocating compressor;

2 is a longitudinal sectional view showing an example of the reciprocating compressor of the present invention;

Figure 3 is a perspective view showing the installation shape of the loop pipe in the reciprocating compressor of the present invention,

Figure 4 is a schematic view showing an example of the spiral portion in the loop pipe of the reciprocating compressor of the present invention,

5 is a schematic view showing a modification of the helical portion in the loop pipe of the reciprocating compressor of the present invention;

6a and 6b are schematic views showing a state in which the spiral portions of the present invention are arranged on a coaxial line,

7A and 7B are schematic views showing a state in which the spiral portions of the present invention are arranged on different axes.

** Description of symbols for the main parts of the drawing **

30: compression unit 31: piston

32: cylinder 34A: discharge cover

34B: discharge valve 51,52: inner and outer spring

100: loop pipe 110,120: spiral part

In order to achieve the object of the present invention, the air gap between the two stator and the stator of the airtight container and the inner stator and the outer stator fixed with a predetermined gap in the interior of the airtight container and the inlet and discharge port is communicated A reciprocating motor comprising a mover disposed in the reciprocating motion, a piston coupled to the mover of the reciprocating motor and reciprocating together, and a cylinder supported by the piston to be slidably inserted to form a compression space. A reciprocating compressor comprising a compression unit, a frame unit supporting the reciprocating motor and the compression unit, and a spring unit elastically supporting a mover of the reciprocating motor in a movement direction to induce resonance, wherein the discharge side of the compression unit Compression unit as described above to communicate between the discharge port of the sealed container and A loop pipe structure of a reciprocating compressor comprising at least two spiral parts which are turned at least once in a direction perpendicular to the direction of movement of the coil, having a straight part between the spiral parts and formed on the same central axis. Further, at least two or more spiral portions that are wound at least once in a vertical direction with respect to the movement direction of the compression unit are provided so as to communicate between the discharge side of the compression unit and the discharge port of the sealed container. There is provided a loop pipe structure of a reciprocating compressor having a straight line portion and arranged substantially parallel to each other at a predetermined distance between the helical portions. In addition, between the discharge side of the compression unit and the discharge port of the sealed container. Spiral and at least one turn in the direction of motion of said compression unit There is provided a loop pipe structure of the reciprocating compressor comprising at least two, wherein the helical portion is formed in substantially parallel with a predetermined distance between the central axis. Hereinafter, the loop pipe of the reciprocating compressor according to the present invention. The structure will be described in detail based on the embodiment shown in the accompanying drawings.

Figure 2 is a longitudinal sectional view showing an example of the reciprocating compressor of the present invention, Figure 3 is a perspective view showing the installation shape of the loop pipe in the reciprocating compressor of the present invention, Figure 4 is an example of a spiral portion in the loop pipe of the reciprocating compressor of the present invention Is a schematic diagram.

As shown therein, the reciprocating compressor according to the present invention includes a hermetically sealed container 10 through which a suction pipe SP and a discharge tube RP communicate with each other, and a reciprocating motor 20 fixed inside the hermetically sealed container 10. And a compression unit 30 installed inside the sealed container 10 for suction and compression of gas, and a frame unit 40 that is elastically supported by being coupled to the reciprocating motor 30 and the compression unit 30. And a spring unit 50 which elastically supports the mover 22 of the reciprocating motor 20 in the movement direction to induce resonance, and allows the discharge side of the compression unit 30 to communicate with the discharge tube DP. It consists of a loop pipe 100 that can attenuate the vibration transmitted from the unit (30).

The compression unit 30 is coupled to the mover 22 of the reciprocating motor 20 to reciprocate together and the piston 31 is fixed to the frame unit 40 so that the piston 31 is slidably compressed. A cylinder 32 forming a space, a suction valve 33 mounted on the front end surface of the piston 31 to limit the intake of refrigerant gas, and a discharge valve mounted on the front end surface of the cylinder 32 to restrict the discharge of the compressed gas. It consists of a discharge valve assembly 34.

The discharge valve assembly 34 includes a discharge cover 34A having a discharge space and installed to cover the front end surface of the cylinder, and an interior of the discharge cover 34A to open and close the compression space while being detached from the front end surface of the cylinder 32. A discharge valve 34B disposed at the upper side and a valve spring 34C disposed at both ends thereof between the discharge cover 34A and the discharge valve 34B.

The roof pipe 100 is installed in communication between the discharge hole of the discharge cover 34A and the discharge pipe DP of the sealed container 10. The loop pipe 100 is compressed in the middle as shown in FIGS. 2 to 4. A plurality of spiral parts 120 wound at least once in a horizontal direction with respect to the vibration direction of the unit 30 or wound at least once perpendicular to the vibration direction as shown in FIG. 5. Herein, in the case of the spring, when the lateral elastic modulus is lower than the longitudinal elastic modulus, the spiral portion 110 is formed in a direction perpendicular to the vibration direction as shown in FIG. 5 in FIG. 4. It is effective in lowering the vibration transmission amount as compared to forming in the vibration direction as shown.

On the other hand, when there are several spiral parts 110 and 120, as shown in Figs. 6A and 6B, the central axes of the spiral parts 111, 112, 121 and 122 are interposed between straight portions (unsigned) of a predetermined length on the same axis line. And arranged so as to form a so-called 'serial array' or parallel to the central axis of each spiral portion 113, 114, 123, 124 having a predetermined length (unsigned) between them, as shown in FIGS. 7A and 7B. It can also be arranged in a so-called 'parallel arrangement'.

In addition, the loop pipe 100 is preferably formed long enough within the range that the state of the compressed gas can maintain an appropriate level, in this case, the loop pipe is extended to the rear side as well as the front side of the compression unit 30. It is advantageous to effectively arrange each unit of the compressor.

In addition, the loop pipe 100 is preferably made of a coil pipe (coil pipe) so that it can attenuate vibration itself.

In the drawings, the same reference numerals are given to the same parts as in the prior art.

In the drawings, reference numeral 21 is a stator, 21A and 21B are inner and outer stators, 31a is a gas flow path, and 51 and 52 are inner and outer springs.

Vibration reduction device of the reciprocating motor according to the present invention as described above has the following effects.

That is, when power is applied to the reciprocating motor 20 to form a flux in the stator 21, the mover 22 moves along the piston 31 along the direction of the flux to the spring unit 50. By reciprocating in a straight line by the piston, with the piston reciprocating in a straight line in the cylinder 32, a pressure difference is generated in the compression space of the cylinder 32, the refrigerant gas by the pressure difference A series of processes that are sucked into the compressed space of the cylinder 32 through the gas flow path 31a of 31 and then compressed and discharged are repeated.

At this time, as the piston 31 reciprocates, the compression unit 30 vibrates in the lateral direction of the drawing, and the vibration is transmitted to the outside of the compressor through the loop pipe 100 coupled to the discharge cover 34A. In order to prevent the vibration from being transmitted to the outside of the compressor, the spiral parts 110 and 120 provided in the middle of the loop pipe 100 act as springs to attenuate the vibration transmitted from the compression unit 30 step by step. In addition, when the roof pipe 100 is formed of a plurality of spiral parts 110 and 120, an empty space between the sealed container 10 of the compressor and the various units 20, 30, 40 is appropriate. The size of the compressor can be reduced as much as possible compared to continuously forming the spiral parts 110 and 120 with respect to the length of the same loop pipe 100. Made of coiled pipes, Since the loop pipe 100 itself absorbs the vibration, the vibration from the compression unit 30 can also be effectively reduced. In addition, as mentioned above, the loop absorption is excellent due to the excellent vibration absorption effect of the loop pipe RF. While the volume occupied by the pipe (RF) decreases, the length of the loop pipe (RF) also decreases based on the same vibration absorption, thereby minimizing the pressure drop on the compressed gas in the loop pipe (RF). As the total calorific value of the compressed gas decreases, excessive temperature rise in the sealed container can be prevented, thereby reducing the specific volume increase for the intake gas.

In this way, the vibration generated in the compression unit is attenuated in the loop pipe inside the compressor to prevent the vibration from being transmitted to the outside of the compressor, thereby eliminating vibration noise of the reciprocating compressor and the refrigeration system equipped with the reciprocating compressor due to the vibration. This can improve the reliability of the reciprocating compressor and the refrigeration system equipped with the reciprocating compressor, and increase the vibration absorption effect even if the length of the loop pipe is reduced, thereby reducing the pressure loss in the roof pipe. Compressor performance can be improved by reducing compressor performance and reducing suction loss due to overheating of the suction gas in a sealed container.

In the loop pipe structure of the reciprocating compressor according to the present invention, by providing the spiral portion wound several times in the middle of the loop pipe communicating with the discharge side of the compression unit and the discharge port of the sealed container, horizontally or vertically with respect to the movement direction of the compression unit, The vibration transmitted from the compression unit is effectively damped and attenuated in the helical portion to reduce the vibration noise of the compressor, thereby improving the reliability of the compressor and the refrigeration system to which the compressor is mounted. By reducing the length, the pressure loss in the roof pipe can be reduced, thereby increasing the compressor performance and increasing the compressor efficiency by reducing the suction loss due to the overheating of the suction gas in the closed vessel.

Claims (5)

An airtight container in which an inlet port and an outlet port communicate with each other, an inner stator and an outer stator fixed to a predetermined gap in the airtight container, and an air gap between the two stators and a reciprocating motion A compression unit consisting of a reciprocating motor comprising a ruler, a piston coupled to a mover of the reciprocating motor and reciprocating together, and a cylinder supported by the piston to be slidably inserted to form a compression space; In the reciprocating compressor including a frame unit for supporting the compression unit and a spring unit for elastically supporting the mover of the reciprocating motor in the movement direction to induce resonance, At least two spiral portions that are turned at least once in a vertical direction with respect to the movement direction of the compression unit are provided so as to communicate between the discharge side of the compression unit and the discharge port of the sealed container, and a straight portion is provided between the spiral portions. Loop pipe structure of a reciprocating compressor, characterized in that formed on the same central axis. delete delete An airtight container in which an inlet port and an outlet port communicate with each other, an inner stator and an outer stator fixed to a predetermined gap in the airtight container, and an air gap between the two stators and a reciprocating motion A compression unit consisting of a reciprocating motor comprising a ruler, a piston coupled to a mover of the reciprocating motor and reciprocating together, and a cylinder supported by the piston to be slidably inserted to form a compression space; In the reciprocating compressor including a frame unit for supporting the compression unit and a spring unit for elastically supporting the mover of the reciprocating motor in the movement direction to induce resonance, At least two spiral portions that are turned at least once in a vertical direction with respect to the movement direction of the compression unit are provided so as to communicate between the discharge side of the compression unit and the discharge port of the sealed container, and a straight portion is provided between the spiral portions. Loop pipe structure of a reciprocating compressor, characterized in that arranged to be approximately parallel with a predetermined distance between each central axis. An airtight container in which an inlet port and an outlet port communicate with each other, an inner stator and an outer stator fixed to a predetermined gap in the airtight container, and an air gap between the two stators and a reciprocating motion A compression unit consisting of a reciprocating motor comprising a ruler, a piston coupled to a mover of the reciprocating motor and reciprocating together, and a cylinder supported by the piston to be slidably inserted to form a compression space; In the reciprocating compressor including a frame unit for supporting the compression unit and a spring unit for elastically supporting the mover of the reciprocating motor in the movement direction to induce resonance, At least two spiral portions communicating between the discharge side of the compression unit and the discharge port of the sealed container and turned one or more times in the movement direction of the compression unit are provided, and the spiral portions are substantially parallel with a certain distance between the central axes. Loop pipe structure of a reciprocating compressor, characterized in that formed.