KR100442387B1 - Opposed type reciprocating compressor - Google Patents

Abstract

The present invention relates to an opposite type reciprocating compressor, and the present invention provides a casing for communicating the suction pipe and the discharge pipe, and a first reciprocating motor installed on each of both sides of the casing to generate reciprocating motion in opposite directions; A through-hole provided in the axial direction between the second reciprocating motor and the first reciprocating motor and the second reciprocating motor, and forming a suction passage on the inner circumferential surface of the through-hole to communicate with the suction pipe; A cylinder for forming and mounting a discharge passage so as to communicate with a discharge pipe in the cylinder, and coupled to a mover of the first reciprocating motor to slide into a through hole of the cylinder, and a compression space and the compression space therein Or coupled to a first piston having a gas through-hole so as to communicate with the discharge passage alternately with a mover of the second reciprocating motor. By including a second piston that slides into the compression space of the first piston, it is not necessary to provide a separate valve member to facilitate the processing and assembly of the piston, etc., and to reduce the compressor noise and to install the valve member. Compressor length can be reduced by eliminating space or operating space.

Description

Opposing type reciprocating compressor {OPPOSED TYPE RECIPROCATING COMPRESSOR}

The present invention relates to an opposite type reciprocating compressor, and more particularly, to an opposite type reciprocating compressor which can be easily processed and assembled by reducing a valve and can be reduced in size.

In general, the opposed type reciprocating compressor (Opposed Type Reciprocating Compressor) is a high efficiency low vibration compressor arranged to face each other by combining two compression units in each reciprocating motor in one casing.

As illustrated in FIG. 1, the conventional counter-reciprocating compressor includes a casing 10 having two suction pipes SP1 and SP2 and one discharge pipe DP, and both inner sides of the casing 10. The first reciprocating motor 21 and the second reciprocating motor 22 and the one cylinder 30 mounted between the two reciprocating motors 21 and 22, respectively, and the cylinder 30 both sides And a first piston 41 and a second piston 42 which slide in such a manner that their front end faces face each other and are engaged with the respective movers 21B and 22B of the reciprocating motors 21 and 22. Opening and closing the first suction valve assembly 51 and the second suction valve assembly 52 coupled to the front end surfaces of the pistons 41 and 42 and the discharge holes 32 of the cylinder 30, respectively. It includes one discharge valve assembly 60 that is possibly mounted.

The cylinder 30 is formed in an annular shape having the through holes 31 in the reciprocating direction of the pistons 41 and 42 so that both the pistons 41 and 42 slide in and form a compression space S1. , The outer circumferential surface of the cylinder 30 is in close contact with the inner circumferential surface of the middle portion of the casing 10 is configured to be post-assembled and fixed by welding or bolting. In the middle of the through-hole 31 of the cylinder 30, a discharge hole 32 is formed in communication with the compression space S1 and penetrates in the radial direction of the cylinder 30. As shown in FIG.

The first piston 41 and the second piston 42 are coupled to the respective movers 21B and 22B of the first reciprocating motor 21 and the second reciprocating motor 22, respectively, and each piston ( 41 and 42, the suction passages 41a and 42a are formed through the center portion in the reciprocating direction.

As shown in FIGS. 2 and 3, the first suction valve assembly 51 and the second suction valve assembly 52 communicate with the suction passages 41a and 42a of the respective pistons 41 and 42. Each of the first valve housing 51A and the second valve housing 52A and 52A of the valve housings 51A and 52A. The suction passages 41a and 42a of the pistons 41 and 42 and the valve housings 51A and 52A are inserted into the reciprocating space (unsigned) and reciprocated by the reciprocating motions of the pistons 41 and 42. A first suction valve 51B and a second suction valve 52B for differentially opening and closing the suction holes 51a and 52a.

The discharge valve assembly 60 is installed at the inlet of the discharge pressure region S2 of the cylinder 30 to elastically support the discharge valve 61 for opening and closing the discharge hole 32 and the pressure back surface of the discharge valve 61. It consists of a valve spring 62.

In the drawings, reference numerals 21A and 22A denote first stators and second stators, and reference numerals 71 and 72 denote first resonance springs and second resonance springs.

The conventional opposed reciprocating compressor as described above operates as follows.

That is, when power is applied to each of the reciprocating motors 21 and 22 and the pistons 41 and 42 reciprocate linearly in the through-hole 31 of the cylinder 30, the refrigerant gas flows into each suction pipe SP1. SP2 is sucked into the suction pressure region on both sides of the cylinder 30 from the outside of the casing 10, and then the refrigerant gas is continuously reciprocated by the continuous reciprocating motion of the first piston 41 and the second piston 42. (41) 42 flows into the compression space (S1) of the cylinder 30 along the suction flow path (41a) (42a) of the cylinder 30 is discharged to the system outside the casing (10) through the discharge hole (32) Was.

In more detail, first, as shown in FIG. 2, the refrigerant gas, which is filled in each suction pressure region of the casing 10 in the process of moving both pistons 41 and 42 away from each other, is filled with each piston 41, 42. The suction valve (51B) 52B of the () is sucked into the compression space (S1) of the cylinder 30 through the suction flow path (41a) (42a), wherein the pressure of the compression space (S1) is discharge pressure area (S2) Lower than the pressure), the discharge valve 61 closes the discharge hole.

Thereafter, as shown in FIG. 3, the pressure of the compression space S1 is increased compared to the pressure of the discharge pressure region S2 in the process of moving both pistons 41 and 42 toward each other, and thus the discharge hole of the cylinder 30. The discharge valve 61 which was blocking the 32 is opened, and the refrigerant gas is discharged to the outside of the compressor through the open discharge hole 32. At this time, the suction valves 51B and 52B have a pressure in the compression space S1. The pressure in the casing 10 was higher than that in order to block the suction flow paths 41a and 42a of the respective pistons 41 and 42.

However, the conventional counter-reciprocating compressor as described above is complicated to manufacture the intake valve assembly (51) (52) and the discharge valve assembly 60 itself and is mounted on the piston (41) 42 or the cylinder (30). In order to process each piston 41, 42 and the cylinder 30, as well as difficult to assemble, there was a problem causing the valve noise.

In addition, as the front end surfaces of both pistons 41 and 42 face each other, the lateral length of the compressor should be longer than the length L1 of the sum of the lengths of both pistons 41 and 42 as shown in FIG. Therefore, there was a limit in miniaturizing the compressor.

The present invention has been made in view of the problems of the conventional counter-type reciprocating compressor as described above, by providing a counter-reciprocating reciprocating compressor that can easily manufacture the compressor by removing the intake valve assembly and discharge valve assembly and can also reduce the noise. It is an object of the present invention.

Another object of the present invention is to provide an opposite reciprocating compressor which can reduce the lateral length of the compressor to further reduce the size of the compressor.

1 is a longitudinal sectional view showing an example of a conventional counter-reciprocating compressor.

2 and 3 is a schematic view showing a suction stroke and a discharge stroke, respectively, in a conventional counter-reciprocating compressor.

4 is a schematic view illustrating the compressor length in a conventional counter-reciprocating compressor.

Figure 5 is a longitudinal sectional view showing an example of the present invention opposed reciprocating compressor.

Figure 6 and Figure 7 is a schematic view showing a suction stroke and a discharge stroke in the present invention opposed reciprocating compressor, respectively.

8 is a schematic view illustrating the compressor length in the present invention opposed reciprocating compressor.

Figure 9 is a longitudinal sectional view schematically showing a modification of the present invention opposed reciprocating compressor.

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

110: casing 121,122: first and second reciprocating motor

130: cylinder 131: through hole

132: suction passage 133: discharge passage

134: communication hole 141,142: first and second piston

141a: gas through holes 151,152: first and second resonant springs

SP: Suction tube DP: Discharge tube

S1: suction pressure area S2: compression space

S3: discharge pressure range

In order to achieve the object of the present invention, the first and second reciprocating motors and casings for communicating the suction pipe and the discharge pipe, respectively installed on both sides of the casing to generate reciprocating motion in opposite directions; And a cylinder mounted with a through hole in the axial direction between the first reciprocating motor and the second reciprocating motor, and coupled to a mover of the first reciprocating motor to slide into the through hole of the cylinder. An opposite type reciprocating compressor including a first piston defining a compression space therein and a second piston slidably inserted into the compression space of the first piston coupled to a mover of the second reciprocating motor. do.

In addition, a casing for communicating the suction pipe and the discharge pipe with each other, a first reciprocating motor and a second reciprocating motor each provided on both sides of the casing to generate reciprocating motion in opposite directions, and the first reciprocating motor And a through hole in the axial direction between the first and second reciprocating motors, and a suction passage is formed on the inner circumferential surface of the through hole so as to communicate with the suction tube, and a discharge passage is formed to communicate with the discharge tube through the through hole. A gas through hole coupled to a cylinder and coupled to the mover of the first reciprocating motor to be slidably inserted into the through hole of the cylinder and having a compression space therein and the compression space alternately communicating with the suction flow path or the discharge flow path of the cylinder; A second piece coupled to the first piston and the mover of the second reciprocating motor to slide into the compression space of the first piston. Including a provides a counter-type reciprocating compressor.

Hereinafter, the opposite type reciprocating compressor according to the present invention will be described in detail based on the embodiment shown in the accompanying drawings.

Figure 5 is a longitudinal cross-sectional view showing an example of the present invention reciprocating reciprocating compressor, Figures 6 and 7 is a schematic view showing a suction stroke and a discharge stroke in the present invention reciprocating compressor, Figure 8 is a reciprocating reciprocating type of the present invention A schematic diagram is shown for explaining the compressor length in a compressor.

As shown in the figure, the counter-reciprocating compressor of the present invention is provided on the casing 110 to which the suction pipes SP1 and SP2 and the discharge pipe DP communicate with each other, and on both sides of the casing 110, respectively. The first reciprocating motor 121 and the second reciprocating motor 122, the first reciprocating motor 121 and the second reciprocating motor, in which the movable members 121B and 122B reciprocate in opposite directions. A cylinder 130 positioned between the cylinders 122 and having a through-hole 131 in the center thereof in close contact with the inner circumferential surface of the casing 110, and the mover 121B of the first reciprocating motor 121. A first piston 141 and a compression space of the first piston 141, which are coupled to each other and provided with a compression space S2 in the center thereof and slidably inserted into the through hole 131 of the cylinder 130. And a second piston 142, which is slidably inserted into S2.

The casing 110 is partitioned into the left and right suction pressure areas S1 and S1 by the cylinder 130, and the suction pipe SP1 is longitudinally disposed on either or both sides of the suction pressure areas S1 and S1. SP2 is provided in communication with the discharge pipe DP in the width direction in the center.

The cylinder 130 is formed in an annular shape such that its outer circumferential surface is in close contact with the inner circumferential surface of the casing 110 and has a through hole 131 at the center thereof, and a suction pipe SP1 (SP2) is formed at one side of the inner circumferential surface of the through hole 131. At least one suction passage 132 is formed to be grooved by a predetermined length in the axial direction so as to communicate with the discharge passage, and one side of the through hole 131 has a discharge passage 133 radially in communication with the discharge tube DP. To penetrate into.

In addition, at least one communication hole 134 communicating with both suction pressure regions S1 and S2 of the casing 110 with each other is preferably formed at one side of the cylinder 130.

The first piston 141 is coupled to the mover 121B of the first reciprocating motor 121 to slide in the through hole 131 of the cylinder 130, and has a compression space S2 and a compression space therein. The gas through hole 141a is formed by grooving or through the inner circumferential surface of the through hole 131 so that S2 alternately communicates with the suction passage 132 or the discharge passage 133 of the cylinder 130. do.

The second piston 142 is coupled to the mover 122B of the second reciprocating motor 122 and is formed in a rod-like shape so as to slide into the compression space S2 of the first piston 141. .

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

Reference numerals 151 and 152 in the drawings denote first and second resonant springs.

Effects of the present invention counter-reciprocating compressor as described above are as follows.

That is, when power is applied to the first reciprocating motor 121 and the second reciprocating motor 122, the first piston 141 reciprocates from side to side in the through hole 131 of the cylinder 130. At the same time, the second piston 142 alternately reciprocates from side to side with the first piston 141 in the compression space S2 of the first piston 141, and thus the suction pressure region S1 and S1 of the casing 110. The refrigerant gas filled in is sucked into the compression space (S2) and then discharged through the discharge passage 133 is repeated.

In detail, first, as shown in FIG. 6, the gas passage hole 141a of the first piston 141 is the suction passage 132 of the cylinder 130 in a process in which both pistons 141 and 142 move away from each other. ), And at the same time, the refrigerant gas filled in the suction pressure regions S1 and S2 of the casing 110 is compressed by the first piston 141 through the suction passage 132 and the gas through hole 141a. It is sucked into the space S2.

At this time, the first piston 141 blocks the discharge flow path 133 of the cylinder 130 to prevent the refrigerant gas sucked into the compression space (S2) to flow out of the casing 110 through the discharge flow path 133. prevent.

Thereafter, as shown in FIG. 7, while the first piston 141 and the second piston 142 move toward each other, the volume of the compressed space S2 is narrowed, and the refrigerant gas filled in the compressed space S2 is It is compressed and discharged to the outside of the casing 110 through the discharge passage 133 of the first piston (141).

At this time, as the first piston 141 moves forward, the gas through hole 141a leaves the suction passage 132 of the cylinder 130, and the refrigerant gas in the suction pressure regions S1 and S1 flows into the compression space S2. At the same time, the gas through hole 141a communicates with the discharge passage 133 of the cylinder 130 to discharge the refrigerant gas in the compressed space S2.

In this way, since it is not necessary to provide a separate intake valve assembly and a discharge valve assembly, the compressor can be easily processed and assembled, thereby reducing production cost and reducing compressor noise.

In addition, as the first piston and the second piston overlap each other and reciprocate, the reciprocating length occupied by each piston is reduced, thereby reducing the total length of the compressor relative to the same compression capacity, thereby realizing miniaturization of the opposite reciprocating compressor. Can be.

The case of the modification by this invention is as follows.

That is, in the above-described example, communication holes are formed at one side of the cylinder 130 so as to partition both inner sides of the casing 110 into the suction pressure regions S1 and S1 and the two suction pressure regions S1 and S1 communicate with each other. 9, the interior of the casing 110 is divided into a suction pressure region S1 and a discharge pressure region S3 around the cylinder 130 as shown in FIG. 9. In the suction pressure region S1, a suction pipe SP communicating with the suction passage 132 of the cylinder 130 is mounted, while the discharge pressure region S3 communicates with the discharge passage 133 of the cylinder 130. The discharge pipe DP is mounted.

In this embodiment, a separate discharge pressure region is formed inside the casing, so that when the refrigerant gas is discharged, the discharge gas is introduced into the wide discharge pressure region through the narrow discharge passage and then discharged into the system, so that the discharge noise of the fluid is reduced. The compressor noise can be significantly reduced.

In the opposite type reciprocating compressor according to the present invention, a compression space is formed in the first piston and the second piston is slidably inserted into the compression space of the first piston to reciprocate with each other and the fluid during the reciprocating motion of the two pistons. By restricting the suction and discharge of the compressor, it is not necessary to provide a separate valve member to facilitate the processing and assembly of the piston, etc., and to reduce the compressor noise and to remove the installation space or the operating space of the valve member. The length can be reduced.

Claims (8)

delete A casing which connects the suction pipe and the discharge pipe to each other; A first reciprocating motor and a second reciprocating motor installed on both inner sides of the casing to generate reciprocating motion in opposite directions; A cylinder for forming a through hole in the axial direction between the first reciprocating motor and the second reciprocating motor, and forming a suction passage communicating with the suction pipe and fixing the casing to the casing; The gas through hole is coupled to the mover of the first reciprocating motor so as to slide into the through hole of the cylinder and form a compression space therein to temporarily communicate the compression space with the suction flow path of the cylinder during the reciprocating motion. A first piston to form, Opposite reciprocating compressor including a second piston coupled to the mover of the second reciprocating motor to slide into the compression space of the first piston. The method of claim 2, And the suction flow passage is formed by grooving the inner circumferential surface of the through hole. A casing which connects the suction pipe and the discharge pipe to each other; A first reciprocating motor and a second reciprocating motor installed on both inner sides of the casing to generate reciprocating motion in opposite directions; A cylinder for forming a through hole in the axial direction between the first reciprocating motor and the second reciprocating motor, and forming a discharge passage communicating with the discharge tube and fixing the casing to the casing; The gas through hole is coupled to the mover of the first reciprocating motor so as to slide into the through hole of the cylinder and form a compression space therein to temporarily communicate the compression space with the discharge passage of the cylinder during the reciprocating motion. A first piston to form, Opposite reciprocating compressor including a second piston coupled to the mover of the second reciprocating motor to slide into the compression space of the first piston. A casing which connects the suction pipe and the discharge pipe to each other; A first reciprocating motor and a second reciprocating motor installed on both inner sides of the casing to generate reciprocating motion in opposite directions; A through hole is formed in the axial direction between the first reciprocating motor and the second reciprocating motor, and the suction passage communicating with the suction tube and the discharge passage communicating with the discharge tube are independently formed and fixed to the casing. Cylinders, It is coupled to the mover of the first reciprocating motor and slips into the through-hole of the cylinder and forms a compression space therein to temporarily communicate the compression space alternately with the suction or discharge passage of the cylinder during the reciprocating motion. A first piston forming a gas through hole so that Opposite reciprocating compressor including a second piston coupled to the mover of the second reciprocating motor to slide into the compression space of the first piston. A casing for communicating the suction pipe and the discharge pipe with each other, a first reciprocating motor and a second reciprocating motor each provided on both sides of the casing to generate reciprocating motion in opposite directions, and the first reciprocating motor and the first casing. A cylinder for fixing the through-hole to the casing in the axial direction between the two reciprocating motors, coupled to the mover of the first reciprocating motor, slips into the through-holes of the cylinder and forms a compression space therein. In the opposite type reciprocating compressor comprising a first piston and a second piston coupled to the mover of the second reciprocating motor to slide into the compression space of the first piston, The cylinder has at least one communication hole formed so that its outer circumferential surface closely contacts the inner circumferential surface of the casing so as to partition the inside of the casing into a plurality of suction pressure regions communicating with the respective suction pipes, and to communicate both suction pressure regions of the casing with each other. Opposite reciprocating compressor, characterized in that. delete A casing which connects the suction pipe and the discharge pipe to each other; A first reciprocating motor and a second reciprocating motor installed on both inner sides of the casing to generate reciprocating motion in opposite directions; A through hole is provided in the axial direction between the first reciprocating motor and the second reciprocating motor, and a suction flow path is formed on the inner circumferential surface of the through hole to communicate with the suction pipe, and the discharge hole communicates with the discharge pipe from the through hole. A cylinder for forming and mounting a flow path, A first piston coupled to the mover of the first reciprocating motor and slidably inserted into the through-hole of the cylinder and having a gas through-hole so that the compression space and the compression space alternately communicate with the suction passage or the discharge passage of the cylinder; , Opposite reciprocating compressor including a second piston coupled to the mover of the second reciprocating motor to slide into the compression space of the first piston.