KR100253996B1 - Two-piston compressor - Google Patents

Abstract

PURPOSE: A two cylinder compressor is provided to achieve an enhanced compression efficiency and durability and lengthen useful life of the compressor by allowing two cylinders to have a rotor, stator and a crank shaft, respectively. CONSTITUTION: A two cylinder compressor comprises a motor unit(10), and a driving unit(40) formed by coupling a solid crank shaft(20) and a hollow crank shaft(30). The motor unit includes a first rotor(12) and a first stator(14) arranged at the lower portion of the motor unit, and a second rotor(12a) and a second stator(14a) arranged above the first rotor and stator. The solid crank shaft is mounted to the first rotor and has a lubrication oil feed groove(22) formed along the outer periphery of the solid crank shaft. The solid crank shaft further has at one side of an upper end thereof an eccentric shaft(23) and at the other side of the upper end thereof a balance weight(24) so as to allow a first piston(82) of a first cylinder(80) to be coupled to the eccentric shaft. The hollow crank shaft is mounted to the second rotor and along the outer periphery of the solid crank shaft, and has at one side of an upper end thereof an eccentric shaft(33) and at the other side of the upper end thereof a balance weight(34) so as to allow a second piston(72) of a second cylinder(70) to be coupled to the eccentric shaft.

Description

A compressor having two cylinders.

The present invention relates to a two-cylinder compressor, which will be described in more detail, so that each rotor, the stator and the crankshaft can be rotated to apply various compression capacities, increase the lubrication effect and cool down to the cylinder. The present invention relates to a two-cylinder compressor capable of increasing the compression efficiency as well as increasing the durability and extending the service life.

In general, the compressor compresses the heating medium during the four processes of air conditioning cycle, condensation, expansion, and evaporation, that is, converts the heating medium into a gaseous heating medium of high temperature and high pressure and sends it to the next stage. According to the method, it is divided into volume compression type, that is, reciprocating compressor, screw compressor, rotary compressor, and centrifugal turbo compressor.

The compressor is classified into an open type, a closed type, and a semi-sealed type according to its appearance, and is classified into a water cooling type and an air cooling type by a cooling method, classified into low, medium, and high speed according to the rotational speed, and classified into a short passage and a multi cylinder by the number of cylinders. .

Most of the cylinders have an even number, such as 4, 6, 8, 12, and 16 cylinders, in order to balance the dynamics.

The advantages of multi-cylinder compressors are that they have good dynamic balance, low vibration, easy foundation work, small size, light weight, low installation area, and common parts. It is possible to reduce the cost, the compatibility of each part is easy to repair, and the capacity control and automatic control is possible to operate economically.

On the other hand, the disadvantage is that it is difficult to maintain the low pressure side at high vacuum due to poor volumetric efficiency, high speed and multi-cylinder, high consumption of lubricating oil, difficult to find failure, and wear rate of friction parts and bearings. A large point and a high temperature of the discharge gas caused a problem in that deterioration and carbonization of the lubricating oil easily occurred.

Among the compressors constructed and classified as described above, the present disclosure will be described with reference to the accompanying drawings for a two-cylinder compressor having two cylinders.

FIG. 2 is a schematic cross-sectional view illustrating a structure of a conventional two-cylinder compressor, in which a rotor 92 and a stator 94 are formed at a lower portion thereof, and the rotor 92 has a first crank pin 910 at an upper portion thereof. The main body is installed by the first piston 82, the compression acting on the first cylinder (80) and the second piston 72, the compression acting on the second cylinder (70) with the second crank pin 920 below The lower end of the crankshaft 90 is inserted.

The first crank pin 910 and the second crank pin 920 are eccentrically formed at the center of the main body crank shaft 90.

Lubricating oil supply grooves 90a are formed on the outer circumference of the main body crankshaft 90 to the lower ends of the second crank pins 920, and on the other sides of the first crank pins 910 and the second crank pins 920, respectively. Balance weights 911 and 921 are formed.

Referring to the operation relationship of the conventional two-cylinder compressor 100 configured as described above, the first crank formed in the upper portion of the main body crank shaft 90 while the main body crank shaft 90 is rotated by one rotor 92 Each of the first piston 82 and the second piston 72 fastened by the pin 910 and the second crank pin 920 moves forward and backward in the first cylinder 80 and the second cylinder 70, respectively. If you do compression.

However, in the two-cylinder compressor 100 configured and operated as described above, since the main body crank shaft 90 rotates in one direction, the first crank pin 910 and the second crank pin 920 formed thereon also rotate in the same direction in one direction. The first pistons 82 and the second pistons 72 compress the first cylinder 80 and the second cylinder 70 in each of the channels, so that the application range is narrow, that is, the first cylinder 80 The second cylinder 70 and the other compression problem occurred.

In addition, by rotating the main body crank shaft 90 in which the first crank pin 910 and the second crank pin 920 is formed to rotate from one rotor 92 to perform a compression action, a large load is applied and a predetermined amount of current or more. As the flow continued, the service life was shortened and problems such as deterioration of lubricant due to temperature rise and accumulation occurred.

And, the lubricant supply groove (90a) formed on the outer periphery of the main body crankshaft 90 is formed only to the lower end of the second crank pin 920 and the lubricant is introduced only by the rotational force rotating in one direction, so that the amount of lubricant supply As a result, there is a shortage, and thus, the lubricant may not be properly supplied to the first crank pin 910 formed on the upper side of the second crank pin 920, resulting in many driving problems.

Accordingly, the present invention has been made to solve the above problems, it is possible to rotate by forming each rotor, stator and crankshaft to apply various compression capacities, increase the lubrication effect and cooling to the cylinder The purpose is to increase the compression efficiency, as well as to increase durability and extend the life.

In order to achieve the above object, the present invention is a two-cylinder compressor having a first cylinder and a second cylinder into which the first piston and the second piston are inserted in the upper portion and performing a compression action, wherein An electric motor unit having an electron and a first stator formed thereon, and a second rotor and a second stator formed thereon, and a lubricating oil supply groove formed on an outer circumference of the first rotor, and the first cylinder of the first cylinder upwardly formed. A solid crank shaft having an eccentric shaft formed at one end thereof and a balance weight formed at the other side thereof so that the piston is fastened, and a second piston of the second cylinder fastened to the second rotor at an outer circumference of the solid crank shaft. An eccentric shaft is formed at one end, and the other end is formed of a driving unit formed by coupling a hollow crank shaft having a balance weight.

The solid crank shaft of the first rotor and the hollow crank shaft of the second rotor are rotated in opposite directions to each other.

1 is a schematic cross-sectional view showing main parts of the present invention.

Figure 2 is a schematic sectional view of the main part showing the configuration of a conventional two-cylinder compressor.

Explanation of Signs of Major Parts of Drawings

1,100: two-cylinder cylinder 10: electric motor part

12: first rotor 12a: second rotor

14: first stator 14a: second stator

20: solid crankshaft 22: lubricating oil supply groove

23,33: eccentric shaft 24,34: balance weight

30: hollow crankshaft 70: second cylinder

72: second piston 80: first cylinder

82: first piston

Hereinafter, the preferred embodiment of the present invention with reference to the accompanying drawings as follows.

1 is a schematic cross-sectional view showing the main structure of the present invention, in which a first cylinder 80 and a second cylinder 70 into which each of the first piston 82 and the second piston 72 are inserted are arranged. A first rotor 12 and a first stator 14 formed at a lower portion thereof, and an electric motor unit 10 having a second rotor 12a and a second stator 14a formed thereon; The rotor 12 has a lubricating oil supply groove 22 formed at an outer circumference thereof, and an eccentric shaft 23 is formed at one end thereof so that the first piston 82 of the first cylinder 80 is fastened upwardly, and to the other side. The second piston of the second cylinder 70 is provided on the upper side of the second crankshaft 20 with the solid crankshaft 20 having the balance weight 24 provided thereon and the outer circumference of the solid crankshaft 20. An eccentric shaft 33 is formed at one end so that the 72 is fastened, and the other end is formed of a driving unit 40 formed by coupling the hollow crank shaft 30 having the balance weight 34. The figure which shows the two-cylinder compressor 1 is shown.

The solid crank shaft 20 of the first rotor 12 and the hollow crank shaft 30 of the second rotor 12a are rotated in opposite directions.

The operation, operation and effects of the present invention configured as described above will be described in more detail with reference to FIG. 1 as follows.

First, the first cylinder 82 is coupled to the eccentric shaft 23 formed on the upper side while the solid crank shaft 20 coupled to the first rotor 12 of the two-cylinder compressor 1 rotates forward. Reciprocating motion within the 80 to perform a compression action, and at the same time the second crank shaft 30 coupled to the second rotor 12a is fastened to the second eccentric shaft 33 is formed to the upper side eccentric shaft 33 The 72 is reciprocated in the second cylinder 70 to perform a compression action.

The solid crankshaft 20 and the hollow crankshaft 30 may be rotated in opposite directions to each other as a fluid film of lubricating oil supplied along a lubricating oil supply groove 22 formed at the outer circumference of the solid crankshaft 20. Would be possible.

In addition, the lubricating oil supplied to the lubricating oil supply groove 22 formed on the outer circumference of the solid crankshaft 20 as described above has its rotational force as the solid crankshaft 20 and the hollow crankshaft 30 rotate in opposite directions. By sucking a large amount of lubricating oil by the interaction of and supplying sufficiently to the first cylinder 80 side and the second cylinder 70 side, each rotating unit is provided with a condition that can be smoothly rotated, The lubricating oil supplied together is provided with a condition in which the effect of cooling the first cylinder 80 and the second cylinder 70 is imposed to increase the compression efficiency.

In the first cylinder 80 and the second cylinder 70, the first rotor 12 and the second rotor 12a of the solid crank shaft 20 and the hollow crank shaft 30 rotated in opposite directions to each other. Independent compression is possible under the control of each of the various compression capacity can be applied to the advantage that can be applied.

In the above, the solid crank shaft 20 and the hollow crank shaft 30 are rotated by each of the independent first rotor 12 and the second rotor 12a only when they are compressed by the cylinders 80 and 70. As a load is applied, it is provided with the conditions which can prolong its durability and lifetime.

As described above, by forming each rotor, stator and crankshaft in a two-cylinder compressor, it is possible to mix and apply various compression capacities in one compressor, increase the lubrication effect and cool down to the cylinder to increase the compression efficiency. Of course, it is a preferred invention that can increase durability and extend life.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible.

Therefore, the true technical protection scope of the present invention should be defined only by the appended claims.

Claims (2)

In a two-cylinder compressor having a first cylinder and a second cylinder into which the first piston and the second piston are inserted, and having a compression action, the first rotor 12 and the first stator 14 are provided at the bottom thereof. Is formed and a motor rotor 10 having a second rotor 12a and a second stator 14a formed thereon, and a lubricant supply groove 22 formed on the outer circumference of the first rotor 12. And a solid crank shaft 20 having an eccentric shaft 23 formed at one end thereof and a balance weight 24 formed at the other side thereof so that the first piston 12 of the first cylinder 80 is fastened upward. An eccentric shaft 33 is formed at one end of the second rotor 12a so that the second piston 72 of the second cylinder 70 is fastened to the outer circumference of the solid crank shaft 20, and at the other end thereof. Two-cylinder pressure, characterized in that consisting of a drive unit 40 formed by coupling the hollow crankshaft 30, the balance weight 34 is formed Group. The two-cylinder compressor according to claim 1, wherein the solid crankshaft (20) of the first rotor (12) and the hollow crankshaft (30) of the second rotor (12a) are rotated in opposite directions.

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