KR100878606B1 - Reciprocating compressor - Google Patents

Abstract

The present invention relates to a reciprocating compressor for compressing and then discharging the refrigerant sucked into the compression space as the movable member reciprocates linearly. In particular, the present invention relates to a reciprocating compressor capable of reducing the flow path resistance of the refrigerant sucked into the compression space. It is about.

A reciprocating compressor according to the present invention comprises a fixed member having a compression space for compressing the refrigerant once inside; A guiding member reciprocating linearly in the fixed member and having at least one opening at one end thereof in contact with the compression space, the guide tube being positioned in the movable member and guiding the refrigerant to the at least one opening; Or it is formed to be inclined in the openings, the guide portion for guiding the suction flow of the refrigerant; because it is configured to further include reducing the suction flow path resistance of the refrigerant, it is possible to further increase the compression efficiency.

Reciprocating compressor, linear compressor, movable member, muffler assembly, sound pipe, guide pipe, guide part

Description

Reciprocating Compressor {RECIPROCATING COMPRESSOR}

1 is a view showing an example of a reciprocating compressor according to the prior art.

2 shows an example of a reciprocating compressor according to the invention.

3 is a view showing the main part of FIG.

4 is a cross-sectional view taken along the line a-a of FIG.

<Explanation of symbols on main parts of the drawings>

101 frame 102 fixing member

103: movable member 103a: guide portion

103h: openings 104: suction valve

105: discharge valve assembly 106: linear motor

107: motor cover 108: supporter

109: body cover 110: muffler assembly

111: sound tube 112: sound chamber

113: inner tube 114,115: partition wall

116: guide tube

The present invention relates to a reciprocating compressor for compressing and then discharging the refrigerant sucked into the compression space as the movable member reciprocates linearly. In particular, the present invention relates to a reciprocating compressor capable of reducing the flow path resistance of the refrigerant sucked into the compression space. It is about.

In general, the reciprocating compressor is configured to compress the refrigerant while the piston reciprocates linearly within the cylinder by forming a compression space in which the working gas is absorbed and discharged between the piston and the cylinder.

Recently, the reciprocating compressor includes a component such as a crank shaft in order to convert the rotational force of the drive motor to the reciprocating linear kinetic force of the piston, there is a problem that a large mechanical loss caused by the movement change occurs. Many linear compressors have been developed for this purpose.

Such a linear compressor, in particular, allows the piston to be directly connected to a linear motor in reciprocating linear motion, thereby eliminating mechanical loss due to motion switching, thereby improving compression efficiency, and having a simple structure, and controlling power input to the linear motor. Since the operation can be controlled, the noise is lower than that of other compressors, so it is widely applied to home appliances such as refrigerators used indoors.

1 is a view showing an example of a reciprocating compressor according to the prior art.

Linear compressor, which is an example of a reciprocating compressor according to the prior art, has a frame 1, a fixing member 2, a movable member 3, a suction valve 4 inside a shell (not shown), as shown in FIG. Installed so that the structure consisting of the discharge valve assembly (5), the linear motor (6), the motor cover (7), the supporter (8), the body cover (9), the buffer spring (not shown), and the muffler assembly (10) is elastically supported. do.

More specifically, the fixing member 2 is fixed to one end of the frame 1 in a hollow shape with both ends open, and the discharge valve assembly 5 is installed to block one end of the fixing member 2, the discharge valve The assembly 5 is configured such that the discharge valve 5a, the discharge cap 5b, and the discharge valve spring 5c are assembled, and the refrigerant discharged from the discharge cap 5b is vibrated and noised through a loop pipe (not shown). This reduction is then made to exit through the outlet tube (not shown) on the shell side.

Next, the movable member 3 is inserted into the inside of the fixing member 2, one end of which is blocked in a hollow shape, one end of the movable member 3 forms a compression space P between the fixing member 2 and the movable member 3, but is movable Openings 3h through which the refrigerant is sucked into the compression space P are provided at the closed end of the member 3.

At this time, the suction valve (4) is formed in a thin shape, bolted to the closed end of the movable member (3) is installed to open and close the opening (3h) of the movable member (3) by the change of the compression space (P) do.

Next, the linear motor 6 has a cylindrical inner stator 6a fixed to the outside of the fixing member 2, one end of which is supported by the frame 1 at regular intervals in the radial direction and the motor cover 7 at the other end thereof. A connection member connecting the outer stator 6b, the permanent magnet 6c installed at a predetermined gap between the inner stator 6a and the outer stator 6b, and the movable member 3 and the permanent magnet 6c supported by the 6d).

At this time, the inner stator 6a is configured such that laminations are stacked in the circumferential direction, and since the outer stator 6b is mounted to the coil winding body at regular intervals in the circumferential direction, power is supplied from the outside to the outer stator 6b. When this is supplied, the inner stator 6a, the outer stator 6b and the permanent magnet 6c generate mutual electromagnetic force, and the permanent magnet 6c and the movable member 3 connected thereto are reciprocated linearly in the axial direction. .

The motor cover 7 is then bolted to the frame 1 while supporting the outer stator 6b in the axial direction to fix the outer stator 6b, and the body cover 9 is attached to the motor cover 7. The supporter 8 coupled to the other end of the movable member 3 is coupled between the motor cover 7 and the main body cover 9 so as to be elastically supported in the axial direction by the buffer springs.

At this time, the body cover 9 is provided with a predetermined suction port so that the refrigerant introduced from the inlet pipe on the shell side can pass therethrough.

Next, the muffler assembly 10 includes a sound chamber 11 axially installed inside the movable member 3, a hollow chamber 12 provided on the outside of the other end of the movable member 3, and a chamber 12. The inner tube 13 is mounted inside the inlet, and the partition walls 14 and 15 are provided with openings through which the refrigerant can pass even if the space is partitioned inside the chamber 13.

Of course, the muffler assembly 10 changes the pressure and flow rate as the refrigerant flows, thereby reducing the flow noise of the refrigerant.

Accordingly, when the linear motor 6 is operated, the movable member 3 and the muffler assembly 10 connected thereto are reciprocated linearly, and the suction valve 4 and the discharge valve are varied as the pressure of the compression space P is varied. The operation of the assembly 5 is automatically adjusted, and by this operation, the coolant causes the suction tube on the shell side, the opening of the body cover 9, the muffler assembly 10 and the openings 3h of the movable member 3 to be opened. After being sucked into the compression space P and compressed, it is discharged to the outside through the discharge cap 5b, the roof pipe and the outlet pipe on the shell side.

However, in the conventional reciprocating compressor, a noise tube is installed in the axial center line of the movable member, and openings are installed in the circumferential direction away from the axial center line of the movable member, so that the refrigerant is separated between the opening of the noise tube and the movable member. Fluctuations in the flow path are generated rapidly, and this causes not only the suction pressure loss of the refrigerant but also a problem of lowering the compression efficiency.

An object of the present invention is to provide a reciprocating compressor capable of reducing the resistance of a suction flow path of a refrigerant sucked into a compression space.

The present invention for solving the above problems is fixed member; A movable member reciprocating linearly with respect to the fixed member to form a compression space for compressing the refrigerant between the fixed member; A sound pipe installed inside the movable member along the axial direction of the movable member for a long time; Then, at one end of the movable member in contact with the compression space, the refrigerant flowing eccentrically from the axial center line of the movable member on a circumference spaced outwardly from the axial center line of the movable member by the sound pipe, is moved into the compression space. An reciprocating compressor comprising: an opening formed to flow therein, the reciprocating compressor comprising: a guide tube formed so as to extend in diameter toward a axial direction away from an end of the sound pipe in an end of the sound pipe; Provide a compressor.

In addition, the opening portion provides a reciprocating compressor further comprising a; guide portion formed in a chamfered shape near the axial center line of the movable member.

In addition, the guide tube provides a reciprocating compressor, characterized in that formed by pressing or welding a tube manufactured separately at the end of the sound pipe.

In addition, the guide tube provides a reciprocating compressor, characterized in that formed integrally with the sound pipe by expanding the end of the sound pipe.

On the other hand, the present invention; A movable member reciprocating linearly with respect to the fixed member to form a compression space for compressing the refrigerant between the fixed member; A sound pipe installed inside the movable member along the axial direction of the movable member for a long time; Then, at one end of the movable member in contact with the compression space, the refrigerant flowing eccentrically from the axial center line of the movable member on a circumference spaced outwardly from the axial center line of the movable member by the sound pipe, is moved into the compression space. In the reciprocating compressor comprising an opening formed so as to flow in, the opening provides a reciprocating compressor comprising a; guide portion formed in a chamfered shape near the axial center line of the movable member.

In addition, at the end of the sound pipe, the guide pipe is formed so as to extend in diameter as the axial direction away from the end of the sound pipe; further comprising, when viewed from the axial direction of the movable member, the guide pipe and the guide portion overlap each other Provided is a reciprocating compressor characterized by the presence of a zone.

In addition, there is provided a reciprocating compressor, characterized in that the center line of the sound pipe is eccentrically configured from the axial center line of the movable member to the portion where the opening is located.

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

2 is a view showing an example of a reciprocating compressor according to the present invention, Figure 3 is a view showing the main part of Figure 2, Figure 4 is a cross-sectional view taken along the line a-a of FIG.

Linear compressor, which is an example of the reciprocating compressor according to the present invention, has a frame 101, a fixing member 102, a movable member 103, and a suction valve inside a shell (not shown) as shown in FIGS. 104, the structure consisting of the discharge valve assembly 105, linear motor 106, motor cover 107, supporter 108, body cover 109, buffer spring (not shown), muffler assembly 110 is elastic Is installed to be supported, between the movable member 103 and the muffler assembly 110 is configured to reduce the suction flow path resistance of the refrigerant sucked into the compression space (P).

Of course, the frame 101, the fixing member 102, the intake valve 104, the discharge valve assembly 105, the linear motor 106, the motor cover 107, the supporter 108, the body cover 109 is conventional Since the configuration is the same as the detailed description thereof will be omitted.

More specifically, in order to reduce the suction flow path resistance of the refrigerant sucked into the compression space (P), the guide portion 103a is provided on the movable member 103 side and the guide tube 116 is provided on the muffler assembly 110 side. It is provided.

First, the movable member 103 is formed so that one end is blocked and at the same time, openings 103h through which refrigerant is sucked into the compression space P are formed, and the openings 103h are formed in the axial center line of the movable member 103. Three are formed side by side on the circumference at a certain distance from C1), the center line (C2) is positioned to be spaced apart from the axial center line (C1) of the movable member (103).

At this time, the openings 103h are formed horizontally with respect to the axial center line C1 of the movable member 103, and the guide portion 103a is formed in the axial center lines of the movable member 103 in the openings 103h. It is formed to be inclined in a chamfered shape in a portion close to the C1), the guide portion 103a guides the refrigerant passing through the muffler assembly 110 to smoothly flow into the openings (103h).

Of course, since the guide portion 103a is integrally formed in the openings 103h, the openings 103h seen from the muffler assembly 110 side are more than the openings 103h seen from the surface in contact with the compression space P. It is formed larger and is formed closer to the axial center line C1 of the movable member 103.

Next, the muffler assembly 110 is made of a sound pipe 111, the chamber 112, the inner pipe 113, the partitions 114, 115, but the end of the sound pipe 111 close to the closed end of the movable member 103. The guide tube 116 is extended to the axial direction in the installation.

In particular, the sound pipe 111 and the guide pipe 116 is installed along the axial center line (C1) of the movable member 103, the guide pipe 116 is made separately and pressed or welded to the end of the sound pipe 111 It is fixed, the guide pipe 116 guides the refrigerant passing through the sound pipe 111 to smoothly flow into the guide.

At this time, the guide tube 116 is configured to be larger in the axial direction away from the sound pipe 111, the center line is configured to match the axial center line (C1) of the movable member 103, or the center line The openings 103h may be eccentric from the axial center line C1 of the movable member 103 to the portion where the openings 103h are located.

Of course, when viewed from the axial direction of the movable member 103 to reduce the flow resistance between the guide tube 116 and the guide portion 103a, there is an area where the guide tube 116 and the guide portion 103a overlap each other. It is preferably arranged to.

Furthermore, the guide tube 116 may be made of a separate member and attached to the noise tube 111 of the muffler assembly 110, but configured to expand the end of the noise tube 111 of the muffler assembly 110. In addition, it may be variously configured to be separately manufactured and fixed to the inner side of the movable member 103, the openings 103h of the movable member 103, and the like.

Accordingly, when the linear motor 106 is operated, the movable member 103 and the muffler assembly 110 connected thereto are reciprocated linearly and the refrigerant is sucked into the compression space P, and then compressed and discharged.

At this time, when the movable member 103 moves from the top dead center (TDC: Top dead center) to the bottom dead center (BDC: Bottom dead center), the pressure in the compression space (P) is relatively low, the suction valve 104 Is opened, and the refrigerant is sucked into the compression space P through the suction pipe on the shell side, the opening of the body cover 109, the muffler assembly 110, and the openings 103h of the movable member 103.

In particular, the muffler assembly 110 is located at the axial center line C1 of the movable member 103, and the openings 103h of the movable member 103 are eccentric at the axial centerline C1 of the movable member 103. Although guided by the muffler assembly 110 side guide tube 116 and the opening portion 103h side guide portion 103a of the movable member 103, the flow path of the refrigerant is not changed rapidly but is smoothly flown. Therefore, the resistance of the suction channel of the refrigerant can be reduced.

On the other hand, when the movable member 103 moves from the bottom dead center BDC to the top dead center TDC, the suction valve 104 is closed as the pressure inside the compression space P becomes relatively high, and the compression space P is After the refrigerant is compressed at, and the pressure inside the compression space (P) becomes higher than the predetermined discharge pressure, the discharge valve spring 105c is compressed and the discharge valve 105a is opened to compress the pressure in the compression space (P). The refrigerant is discharged and exits to the outside through the outlet pipe on the side of the roof pipe and the shell.

In the above, the present invention has been described in detail by way of examples based on the embodiments of the present invention and the accompanying drawings. However, the scope of the present invention is not limited by the above embodiments and drawings, and the scope of the present invention will be limited only by the contents described in the claims below.

The reciprocating compressor according to the present invention configured as described above is provided with a guide tube or a guide portion to guide the refrigerant flow into the compression space through the openings provided in the closed end of the movable member to the opening of the movable member. As a result, it is possible to prevent a sudden flow path change of the refrigerant flow, thereby reducing the suction flow path resistance of the refrigerant and further increasing the compression efficiency.

Claims (7)

Fixing member; A movable member reciprocating linearly with respect to the fixed member to form a compression space for compressing the refrigerant between the fixed member; A sound pipe installed inside the movable member along the axial direction of the movable member for a long time; And, At one end of the movable member, which is in contact with the compression space, it is located eccentrically from the axial centerline of the movable member on a circumference spaced outwardly from the axial centerline of the movable member, and the refrigerant flowing through the sound pipe flows into the compression space. In the reciprocating compressor comprising an opening formed so that, A guide tube formed at the end of the sound pipe, the diameter of which extends away from the end of the sound pipe in the axial direction;  And the opening portion includes a guide portion formed in a chamfered shape near a axial center line of the movable member. delete The method of claim 1, Guide tube is a reciprocating compressor, characterized in that formed by pressing or welding a tube produced separately at the end of the sound pipe. The method of claim 1, The guide tube is formed integrally with the sound pipe by expanding the end of the sound pipe, characterized in that the reciprocating compressor Fixing member; A movable member reciprocating linearly with respect to the fixed member to form a compression space for compressing the refrigerant between the fixed member; A sound pipe installed inside the movable member along the axial direction of the movable member for a long time; And, At one end of the movable member, which is in contact with the compression space, it is located eccentrically from the axial centerline of the movable member on a circumference spaced outwardly from the axial centerline of the movable member, and the refrigerant flowing through the sound pipe flows into the compression space. In the reciprocating compressor comprising an opening formed so that, The opening portion is a guide portion formed in a chamfered shape near the axial center line of the movable member; And, And a guide tube formed at an end of the sound pipe, the diameter of which is expanded in the axial direction away from the end of the sound pipe. Viewed from the axial direction of the movable member, the reciprocating compressor, characterized in that there is an area where the guide tube and the guide portion overlap each other. delete The method of claim 5, And the center line of the sound pipe is eccentrically formed from the axial center line of the movable member to the portion where the opening is located.

Images