KR100748545B1 - Apparatus for reducing magnetic flux loss of reciprocating compressor - Google Patents

Abstract

A device for reducing magnetic flux loss of a reciprocating compressor is provided to form a part for blocking leakage of magnetic flux between a stator and a fixed frame thereof, so that magnetic flux leaked from the stator to the fixed frame is concentrated on the part and blocked thereby, improving motor efficiency and preventing adhesion of a piston to a cylinder or a suction valve to the piston. A device for reducing magnetic flux loss of a reciprocating compressor includes a part(100) for blocking leakage of magnetic flux, which is formed of a ferromagnetic element for concentrating leaked magnetic flux and interposed between a stator(21) and a plurality of fixed frames(24) of the reciprocating motor for preventing a piston and a suction valve of a compression unit from being magnetized by magnetic flux leaked into the fixed frames via the stator.

Description

Magnetic flux leakage preventing device of reciprocating compressor {APPARATUS FOR REDUCING MAGNETIC FLUX LOSS OF RECIPROCATING COMPRESSOR}

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

Figure 2 is a longitudinal cross-sectional view showing a magnetic flux leakage phenomenon in a conventional reciprocating compressor,

3 is an exploded longitudinal sectional view showing the magnetic flux leakage preventing device of the reciprocating compressor of the present invention;

Figure 4 is a longitudinal cross-sectional view showing a magnetic flux leakage phenomenon in the reciprocating compressor of the present invention,

Figure 5 is a longitudinal sectional view showing a modification to the flux leakage preventing device of the present invention reciprocating compressor.

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

10: casing 20: reciprocating motor

21: outer stator 22: inner stator

23: mover 24, 25: fixed frame

30: compression unit 31: cylinder

32: piston 33,34: resonant spring

35: suction valve 36: discharge valve

37: valve spring 38: discharge cover

41.42: Longitudinal support spring C: Winding coil

M: Magnet 100: Magnetic flux leakage blocking part

The present invention relates to a magnetic flux leakage preventing apparatus of a reciprocating compressor, and more particularly, to a magnetic flux leakage preventing apparatus of a reciprocating compressor for preventing magnetic flux leakage to a frame supporting a reciprocating motor.

In general, a reciprocating compressor is configured to suck, compress, and discharge a refrigerant while reciprocating in a cylinder block, and may be classified into an electric type and a vibration type according to its driving method. The electric motor is simply configured to reciprocate the piston by receiving the driving force of the motor, and the vibration type is configured to vibrate the piston using the driving force of the motor and the elastic force of the spring supporting the piston.

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

As shown in the related art, the conventional vibration reciprocating compressor (hereinafter, abbreviated as reciprocating compressor) includes a casing 10 having a closed inner space, and fixedly installed inside the casing 10 to move the mover 23. Reciprocating motor 20 is a linear reciprocating motion, and the piston 32 is coupled to the mover 23 of the reciprocating motor 20 to the compression unit 30 to compress the refrigerant while reciprocating together Consists of.

The reciprocating motor 20 has an outer stator 21 in which winding coils C are fixedly stacked by stacking a plurality of stator cores, and an inner stator which is fixed inwardly of the outer stator 21 by stacking a plurality of stator noses. A magnet M is interposed between the stator 22 and the outer stator 21 and the inner stator 22 to reciprocate linearly along the flux by the outer stator 21 and the inner stator 22. It consists of a movable member (23).

The outer stator 21 is fixed to the front fixed frame 24 and the rear fixed frame 25 to the front and rear sides of the movement direction of the mover 23, respectively, the inner stator 22 is the front side It is inserted into the fixed frame 24 and fixedly coupled.

In the drawings, reference numeral 26 denotes a back cover, 31 a cylinder, 33 and 34 a resonant spring, 35 a suction valve, 36 a discharge valve, 37 a valve spring, 38 a discharge cover, 41 and 42 a support spring, SP Is a refrigerant suction pipe, DP is a refrigerant discharge pipe, RP is a loop pipe, S1 is a compression space, S2 is a discharge space, and F is a suction flow path.

In the conventional reciprocating compressor as described above, when a current is applied to the winding coil C of the reciprocating motor 20, a flux is formed between the outer stator 21 and the inner stator 22. The mover 23 placed between the outer stator 21 and the inner stator 22 continuously reciprocates by the front and rear both resonant springs 33 and 34 while moving in the direction of the flux, and the mover 23 Piston 32 coupled to the) was to reciprocate in the interior of the cylinder 31 to suck the refrigerant, compress and then discharge.

However, in the conventional reciprocating compressor as described above, as shown in FIG. 2, a portion of the magnetic flux generated by the current applied to the winding coil C of the reciprocating motor 20 and the magnetic flux generated by the magnet M are forward. Leakage into the cylinder 31 or the piston 32 through the side fixing frame 24 decreases the efficiency of the reciprocating motor 20 due to iron loss, and acts as the piston 32 and the suction valve 33 are magnetized. This becomes unstable and this causes a problem that the compressor efficiency is lowered.

The present invention has been made in view of the problems of the conventional reciprocating compressor as described above, by minimizing the leakage of magnetic flux generated in the coil or magnet of the reciprocating motor to other peripheral equipment, the efficiency of the motor and the behavior of the peripheral equipment It is an object of the present invention to provide a magnetic flux leakage preventing device of a reciprocating compressor that can stabilize the compressor by increasing the efficiency of the compressor.

In order to achieve the object of the present invention, the stator and the coil is fixedly installed, the magnet is provided so as to correspond to the coil of the stator and the reciprocating movement in a straight line while forming a magnetic flux (magnetic flux) with the coil, A reciprocating motor having a plurality of fixing frames supporting both sides of the stator; A cylinder inserted into the fixed frame of the reciprocating motor and fixed therein to form a compression space therein, and a slide passage inserted into the compression space of the cylinder and a suction flow passage formed therein, coupled to the mover to perform a reciprocating motion. Compression unit consisting of a piston for compressing the refrigerant, a suction valve coupled to the front end surface of the piston to open and close the suction flow path of the piston, and a discharge valve that is detachably coupled to the front end surface of the cylinder to open and close the compression space. ; And a magnetic flux leakage blocking part interposed between the stator and the fixed frame of the reciprocating motor and formed of a ferromagnetic material to prevent the piston and the suction valve of the compression unit from magnetizing by the magnetic flux leaking into the fixed frame through the stator. Provided is a flux leakage blocking device for a reciprocating compressor including a.

Hereinafter, the magnetic flux leakage blocking device of the reciprocating compressor according to the present invention will be described in detail based on the embodiment shown in the accompanying drawings.

Figure 3 is a longitudinal cross-sectional view showing the magnetic flux leakage preventing device of the reciprocating compressor of the present invention, Figure 4 is a longitudinal cross-sectional view showing a magnetic flux leakage phenomenon in the reciprocating compressor of the present invention, Figure 5 is a magnetic flux leakage of the reciprocating compressor of the present invention It is a longitudinal cross-sectional view which shows the modification of the prevention apparatus.

The same parts as in the prior art in the drawings will be described with reference to FIG. 1. As shown in the present invention, the reciprocating compressor of the present invention includes a reciprocating motor 20 fixedly installed in the casing 10 so that the mover 23 reciprocates linearly, and the reciprocating motor 20 is movable. Piston 32 is coupled to the chair 23 and the compression unit 30 for compressing the refrigerant while reciprocating together, between the outer stator 21 and the front fixing frame 24 of the reciprocating motor 20 or The magnetic flux leakage blocking part 100 is interposed between the inner stator 22 and the front fixing frame 24 to prevent the magnetic flux from leaking to the outside of the stator 21 and 22.

The reciprocating motor 20 is coupled to the winding coil (C) and is supported on both sides of the front fixing frame 24 and the rear fixing frame 25, the outer stator 21 is elastically supported on the casing (10) And an inner stator 22 fixed to the front side fixing frame 24 at a predetermined interval inside the outer stator 21, and a gap between the outer stator 21 and the inner stator 22. The magnet (M) is arranged on the mover 23 is to reciprocate in a straight line.

The front fixing frame 24 is made of a diamagnetic material such as aluminum, and the cylinder 31 is inserted and fixed in the center thereof, and the cylinder 31 is coupled to the mover 23 of the reciprocating motor 20. The piston 32 for compressing the refrigerant is slidably inserted while reciprocating in a straight line.

The rear fixed frame 25 is made of the same material as the front fixed frame 24 is formed in an annular shape.

The magnetic flux leakage blocking unit 100 is made of a ferromagnetic material so as to concentrate the leakage magnetic flux around the front side fixing frame 24 corresponding to both front and rear sides of the reciprocating motor 20 as shown in FIGS. 3 and 4. It is formed to be in close contact with the inner surface of the rear fixing frame 25 and the front side of the stator 21, 22 and the rear side and the second of the first fixing frame 24 or the stator 21, 22 Installed between the fixing frame 25, or as formed on the inner surface of the front fixed frame 24 and the rear fixed frame 25 as shown in Figure 5 can be more simplified the manufacturing process.

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

The reciprocating compressor of the present invention as described above has the following effects.

That is, when a current is applied to the winding coil C fixed to the outer stator 21 of the reciprocating motor 20, the winding coil C is fixed between the outer stator 21 and the inner stator 22. A flux is formed, and the piston 32 coupled to the mover 23 is moved by the mover 23 lying between the outer stator 21 and the inner stator 22 in the direction of the flux. A reciprocating motion is performed in the interior of the cylinder 31. In this process, the volume of the compression space S1 formed between the cylinder 31 and the piston 32 is changed, and the refrigerant gas is sucked and compressed into the compression space S1. Repeat a series of processes to be discharged.

At this time, the magnetic flux generated while the current is applied to the winding coil C of the reciprocating motor 20 must flow only from the outer stator 21 and the inner stator 22 to maximize the efficiency of the motor and to provide peripheral devices, that is, the piston 32. And the behavior of the intake valve 33 can be stabilized, but a portion of the magnetic flux generated in the winding coil (C) is a tendency to leak to the peripheral mechanism, etc. in addition to the outer stator 21 and the inner stator 22 do. However, as in the present invention, the magnetic flux leakage blocking part 100 made of ferromagnetic material in the front fixing frame 24 and the rear fixing frame 25 supporting both sides of the outer stator 21 and the inner stator 22. In case of intervening), the magnetic flux to be leaked is concentrated on the magnetic flux leakage blocking unit 100, which is a ferromagnetic body, and thus, the magnetic flux of the reciprocating motor is prevented from being leaked to the fixed frame. Through this, the efficiency of the reciprocating motor can be primarily improved, and secondly, magnetic materials such as the piston and the suction valve are magnetized by the leakage magnetic flux to prevent the piston from being adhered to the cylinder or the suction valve from being bonded to the piston. Compressor efficiency can be increased.

In the magnetic flux leakage blocking device of the reciprocating compressor according to the present invention, a magnetic flux leakage blocking part made of a ferromagnetic material is formed between the stator and the fixed frame supporting the magnetic flux, and the magnetic flux leakage blocking part of the magnetic flux to be leaked from the stator to the fixed frame is ferromagnetic. By concentrating on the magnetic flux leakage, the efficiency of the motor is not only improved, but the leaked magnetic flux prevents the magnetic piston from adhering to the cylinder or the suction valve to the piston, thereby improving the efficiency of the compressor. have.

Claims (3)

A stator to which the coil is fixedly installed, a magnet provided to correspond to the coil of the stator, and a movable member that linearly reciprocates while forming a magnetic flux together with the coil, and a plurality of supporting both sides of the stator Reciprocating motor with a fixed frame; A cylinder inserted into the fixed frame of the reciprocating motor and fixed therein to form a compression space therein, and a slide passage inserted into the compression space of the cylinder and a suction flow passage formed therein, coupled to the mover to perform a reciprocating motion. A compression unit comprising a piston for compressing the refrigerant, a suction valve coupled to the piston to open and close the suction flow path of the piston, and a discharge valve detachably coupled to the cylinder to open and close the compression space; And A magnetic flux leakage blocking part interposed between the stator and the fixed frame of the reciprocating motor and formed of a ferromagnetic material to prevent the piston and the suction valve of the compression unit from magnetizing by the magnetic flux leaking into the fixed frame through the stator; Magnetic flux leakage blocking device for reciprocating compressors. The method of claim 1, The magnetic flux leakage blocking unit of the reciprocating compressor is assembled between the stator and the fixed frame. The method of claim 1, The magnetic leakage blocking unit is a magnetic flux leakage blocking device of the reciprocating compressor is coated on the mutually opposite surfaces of the stator or the fixed frame.

Images