JPH0942155A - Compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compressor which allows the increase of specific volume of the refrigerant aspired into a cylinder block by cooling the cylinder head and base muffler. SOLUTION: The compressor comprises a body 50, a crank shaft 53 of rotary motion in the body 50, a reciprocal piston 55 according to the rotation of the crank shaft 53, a cylinder block 60 guiding the reciprocal movement of the piston 55, a cylinder head 30 attached to the cylinder block 60 and having a discharging chamber, a base muffler 20 connected to the cylinder head 30, and an intake muffler 10 connected to the base muffler 30. An oil circulation hole 39 is formed in the cylinder head 30 such that the oil circulates without stagnation in the space 1 formed between the cylinder head 30 and the base muffler 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor, and more particularly to a refrigerant sucked into a cylinder block by circulating oil supplied to a space formed between a base muffler and a cylinder head. The present invention relates to a compressor that suppresses an increase in the specific volume of, thereby improving compression efficiency and refrigeration efficiency.

[0002]

BACKGROUND OF THE INVENTION Conventional compressors, which are typically applied to high capacity refrigeration equipment, are typically driven by a motor which is itself sealed in a frozen storage position. The two dome-shaped separators are mounted with a motor and a compression mechanism and are connected to each other so as to surround an elongated spherical volume. The inhaled gas is normally discharged into the housing to fill the volume before being guided into the compression mechanism and the chamber.

One example of a conventional compressor has been proposed by the applicant to be 19
It is disclosed in Patent Application No. 94-9295 filed in Korea on April 29, 1994. As shown in FIGS. 4 and 5, this conventional compressor includes a main body 50a and a stator 52a provided in the main body 50a and forming a magnetic field.
A rotor 51a that rotates by a magnetic field formed on the stator 52a; a crankshaft 53a that rotates in conjunction with the rotor 51a; and a connecting rod 54a that converts the rotational motion of the crankshaft 53a into a reciprocating motion. When,
A piston 55a which reciprocates by the connecting rod 54a, a cylinder block 60a which guides the reciprocating motion of the piston 55a, and a cylinder block 6
Valve plate 56a fixed to 0a and having an inlet and an outlet, and an intake muffler 10a for attenuating noise generated by the refrigerant supplied to the inlet of the valve plate 56a.
It is composed of

Further, the cylinder head 30a is fixed to the valve plate 56a, and a recess 32a and a mounting chamber 31a are formed on the inner surface thereof. In addition, the cylinder head 30
A base muffler 20a is provided between a and the suction muffler 10a.
It prevents the heat from being transferred to the refrigerant sucked into the cylinder head 60a through a and suppresses the increase in the specific volume of the refrigerant, and also serves to guide the flow of the refrigerant through the suction muffler 10a.

[0005]

However, in the conventional compressor configured as described above, when the base muffler 20a is positioned in the mounting chamber 31a of the cylinder head 30a, the space between the cylinder head 30a and the base muffler 20a is reduced. A space portion 1a as shown in FIG. Then, in the space portion 1a formed between the base muffler 20a and the cylinder head 30a, the main body 5 is inserted through the gap where the cylinder head 30a and the base muffler 20a are connected.
The oil stored in the lower part of 0a vaporizes and permeates, and a part of the oil supplied into the cylinder block 60a through the capillary tube 40a supported by the base muffler 20a permeates, so that the base muffler 20a and the cylinder head 30a. Space portion 1a formed between and (see FIG. 4)
The oil stored in the lower portion of the main body 50 permeates into and is stored in the. Thereby, the heat generated by the rotor 51a and the stator 52a is transferred to the oil stored in the space 1a to raise the temperature of the oil, and the cylinder muffler 20a is guided by the temperature rise of the oil and guided by the cylinder block. The temperature of the refrigerant drawn into 60a rises, and therefore the specific volume of the refrigerant drawn into cylinder block 60a increases. That is, according to the conventional compressor, the oil stored in the space 1a causes the cylinder block 60 to move.
Since the specific volume of the refrigerant sucked into a is increased, there is a problem that the compression efficiency is reduced and the refrigeration efficiency of the refrigeration system is reduced.

Therefore, the present invention has been made to solve the above problems, and an object of the present invention is to supply oil to a space formed between a base muffler and a cylinder head. (EN) A cylinder head and a base muffler are circulated to cool the cylinder head, thereby reducing the specific volume of the refrigerant sucked into the cylinder block and improving the compression efficiency.

[0007]

In order to achieve the above object, a compressor according to the present invention comprises a main body forming an external appearance, a crank shaft provided in the main body for performing a rotary motion, and a crank shaft of the crank shaft. A piston that reciprocates due to rotational movement,
A cylinder block that guides the reciprocating motion of the piston, a cylinder head that is mounted on the cylinder block and has a discharge chamber, a base muffler that is connected to the cylinder head, and an intake muffler that is connected to the base muffler. A compressor for compressing a refrigerant, characterized in that an oil circulation hole is formed in the cylinder head so that the oil circulates without being stored in the space formed between the cylinder head and the base muffler. .

According to the compressor of the present invention thus constructed, the oil circulates without being stored in the space formed between the cylinder head and the base muffler, so that the cylinder head and the base muffler can be efficiently used by the oil. Therefore, the temperature of the refrigerant sucked into the cylinder block can be prevented from increasing, and the increase in the specific volume of the refrigerant can be suppressed, so that the compression efficiency of the compressor can be greatly improved.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment according to the present invention will be described below in detail with reference to the accompanying drawings. 1 is a schematic sectional view showing an internal structure of a compressor according to an embodiment of the present invention, FIG. 2 is an exploded perspective view showing main parts of the compressor according to the present invention, and FIG. 3 is a sectional view of a cylinder head of a compressor according to FIG.

In FIG. 1, reference numeral 50 is a main body for maintaining an airtight inside the compressor and forming an external appearance,
Inside thereof, a stator 52 that is supplied with power from a power supply means (not shown) to form a magnetic field, a rotor 51 that is rotated by the magnetic field formed in the stator 52, and a rotor 51.
Crankshaft 53 that rotates in conjunction with
One end of the connecting rod 54 is connected to the connecting rod 54 for converting the rotational movement of the crankshaft 53 into reciprocating motion, and the other end of the connecting rod 54 is connected to the connecting rod 54.
And a cylinder block 60 that guides the reciprocating motion of the piston 55. Further, oil acting as a coolant and a lubricant is stored in the lower portion (bottom surface portion) of the main body 50.

The cylinder head 30 is fixed to the cylinder block 60 by tightening means (not shown) such as bolts, and the refrigerant compressed by the reciprocating movement of the piston 55 is discharged to the inner surface of the cylinder head 30. Discharge chamber 33
And a mounting chamber 31 in which a base muffler 20 described later is mounted
Are formed. Further, as shown in FIG. 2, on the outer surface of the cylinder head 30, the oil stored in the lower portion of the main body 50 is used in the cylinder block 60 by utilizing the capillary phenomenon.
A fixing groove 34 for fixing the capillary tube 40 to be supplied therein is formed.

Reference numeral 20 in FIG. 1 indicates a stator 52.
Is a base muffler that blocks the transfer of heat from the rotor 51 and guides the flow of the refrigerant so that the refrigerant is sucked into the cylinder block 60 via the suction muffler described later. As shown in FIG. 2, the base muffler 20 includes an insertion portion 21, a body portion 22, and a base portion 24 having a suction chamber 23, which are injection molded from a material such as plastic having a low heat transfer coefficient. . Therefore, the base muffler 20 guides the flow of the refrigerant through the suction muffler 10 (see FIG. 2) described later, and blocks the heat from the stator 52 and the rotor 51 from being transferred to the refrigerant.

When the base muffler 20 is positioned in the mounting chamber 31 of the cylinder head 30 and assembled, the base muffler 20
The space 1 between the cylinder head 30 and the cylinder head 30 (see FIG. 1)
Is formed.

Further, as shown in FIGS. 2 and 3, the cylinder head 30 is circulated so that the oil circulates without being stored in the space 1 formed between the base muffler 20 and the cylinder head 30. A hole 39 is bored. That is, the bottom of the mounting chamber 31 of the cylinder head 30 is provided with an oil circulation hole 39 for circulating the oil supplied to the space 1 to cool the cylinder head 30 and the base muffler 20.

Reference numeral 10 in FIGS. 1 and 2 indicates
A suction muffler that absorbs and attenuates noise generated by the flow of the refrigerant, and has a suction port 12 formed on one side thereof for guiding the refrigerant flowing from an evaporator (not shown).

As shown in FIG. 1, one end of the capillary tube 40 is located in the suction chamber 23 formed in the base muffler 20, and the other end is immersed in the oil stored in the lower portion of the main body. As a result, the capillary tube 40 supplies the oil stored in the lower portion of the main body 50 into the cylinder block 60 by utilizing the capillary phenomenon, thereby providing a lubricating action and a cooling action so that the piston 55 smoothly reciprocates.

The operation of the compressor of the present invention constructed as above will be described below.

First, when power is applied from a power supply means (not shown), a magnetic field is formed in the stator 52 and the stator 5
The rotor 51 and the crankshaft 53 are formed by the magnetic field formed on the rotor 2.
Rotate in conjunction with each other, and this rotating motion is converted into reciprocating motion by the connecting rod 54. Therefore, the piston 55 connected to the connecting rod 54 reciprocates in the cylinder block 60. Where the piston 5
When 5 moves in the direction of arrow E in FIG. 1, the refrigerant is sucked from an evaporator (not shown).

When the compressor operates, part of the oil stored in the lower portion of the main body 50 is vaporized by the heat from the stator 52 and the rotor 51. Further, a part of the oil stored and vaporized in the lower portion of the main body 50 permeates through the gap between the base muffler 20 and the cylinder head 30 and enters the space portion 1 formed between the base muffler 20 and the cylinder head 30. .

Further, a part of the oil supplied into the cylinder block 60 through the capillary tube 40 enters the space portion 1 formed between the cylinder head 30 and the base muffler 20. That is, a part of the oil stored in the lower part of the main body 50 is supplied to the space 1 formed between the cylinder head 30 and the base muffler 20, and the oil supplied to the space 1 is the base muffler 20 and the cylinder. After the head 30 is cooled, it is discharged to the lower part of the main body 50 through the oil circulation hole 39 formed in the cylinder head 30. In this way, the oil supplied to the space 1 is circulated through the oil circulation hole 39 without being stored in the space 1, so that the cooling effect on the cylinder head 30 and the base muffler 20 is improved, Therefore, the temperature of the refrigerant passing through the base muffler 20 via the suction muffler 10 can be prevented from rising.

Further, according to the compressor of the present invention, since the temperature of the refrigerant passing through the base muffler 20 does not rise, the increase in the specific volume of the refrigerant is suppressed. Therefore, since a large amount of refrigerant can be sucked into the cylinder block 60 during the suction stroke,
During the compression stroke, a large amount of refrigerant is compressed into high temperature and high pressure, which can improve the compression efficiency of the compressor.
As a result, as the compression efficiency of the compressor is improved, the evaporation efficiency of the evaporator and the condensation efficiency of the condenser are also improved, so that the overall refrigeration efficiency is greatly improved.

[0022]

As described above, according to the compressor of the present invention, by forming the oil circulation hole in the cylinder head, the oil is stored in the space formed between the cylinder head and the base muffler. Because it circulates without
It is possible to efficiently cool the base muffler and the cylinder head, and thus it is possible to suppress an increase in the specific volume of the refrigerant sucked into the cylinder block and significantly improve the compression efficiency and thus the refrigeration efficiency.

[Brief description of drawings]

FIG. 1 is a sectional view showing an internal structure of a compressor according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a connection relationship between a suction muffler and a cylinder head of the compressor of the present invention.

FIG. 3 is a sectional view of a cylinder head of the compressor of the present invention.

FIG. 4 is a schematic cross-sectional view showing the internal structure of a conventional compressor.

FIG. 5 is an exploded perspective view showing a connection relationship between a suction muffler and a cylinder head of a conventional compressor.

[Explanation of symbols]

 10 suction muffler 20 base muffler 21 insertion part 22 body part 23 suction chamber 24 base part 30 cylinder head 31 installation chamber 33 discharge chamber 39 oil circulation hole 40 capillary tube 50 body 51 rotor 52 stator 53 crankshaft 54 connecting rod 55 piston 60 Cylinder block

Claims (3)

[Claims] 1. A main body forming an external appearance, a crank shaft provided in the main body for rotating motion, a piston reciprocating by the rotary motion of the crank shaft, and a cylinder block for guiding the reciprocating motion of the piston. A compressor for refrigerant compression comprising a cylinder head mounted on the cylinder block and having a discharge chamber, a base muffler coupled to the cylinder head, and a suction muffler coupled to the base muffler, A compressor characterized in that an oil circulation hole is formed in the cylinder head so that oil circulates without being stored in a space formed between the cylinder head and the base muffler. 2. The compressor according to claim 1, wherein the oil circulation hole is formed in a bottom portion of a mounting chamber formed in the cylinder head. 3. The oil circulated through the oil circulation hole cools the cylinder head and the base muffler to suppress an increase in the specific volume of the refrigerant sucked into the cylinder block. The compressor according to claim 1.