KR19990001262U - Discharge muffler cover fixing device of hermetic reciprocating compressor - Google Patents

Abstract

The present invention relates to a discharge muffler cover fixing device of a hermetic reciprocating compressor, wherein the discharge muffler is integrally formed with the main frame, and the discharge muffler is formed with a discharge chamber having a fixed portion at the bottom thereof and an insertion hole formed thereon. In the hermetic reciprocating compressor, which is fastened and fixed to the fixing part by fixing bolts, the insertion hole 10 has a wide upper portion and a narrower lower diameter and is tapered, and the insertion hole 10 is formed on the bottom surface of the fixing bolt 608. By providing a fixing device of the discharge muffler cover of the hermetic reciprocating compressor, the tapered coupling part 20 is formed in accordance with the above), thereby discharging the refrigerant gas converted to high temperature and high pressure by the cylinder compression action of the hermetic reciprocating compressor. The discharge muffler cover of the discharge muffler can be fastened and fixed without additional parts. The material cost reduction and assembly process due to the deletion of a hermetic reciprocating compressor discharge muffler to be formed easily cover relates to a retainer.

Description

Discharge muffler cover fixing device of hermetic reciprocating compressor.

The present invention relates to an apparatus for fixing a discharge muffler cover of a hermetic reciprocating compressor, which will be described in more detail. The present invention relates to a discharge muffler cover fixing device of a hermetic reciprocating compressor that enables easy fastening and fixing without parts, thereby reducing material cost and assembling process easily.

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. .

Among the compressors divided into various forms as described above, in the present application, when the sealed reciprocating compressor is illustrated as an example as shown in FIG. 3, the electric motor and the compressor are sealed by the upper case and the lower case, and appropriate dustproof and soundproofing therein. The main body frame 55 is supported by being suspended in the case by a compression spring or a leaf spring for the purpose of the means.

The main body frame 55 has a motor unit having a stator and a rotor, and a piston is installed to reciprocate the cylinder block 58 and the cylinder therein to the upper end of the crank shaft on which the rotor is fixed, and the reciprocating motion of the piston. By the suction and discharge valve body 60 and the valve cover 59 provided at one end of the cylinder block 58, the low-temperature and low-pressure refrigerant gas is sucked in, and the high-pressure and high-temperature refrigerant gas is discharged.

The suction and discharge valve body 60 is composed of a flapper or reed type thin plate structure which is usually elastic for miniaturization, and the flapper or lead type suction and discharge valve body 60 is double-sided. It is opened and closed passively by the pressure difference acting on.

The closed-type reciprocating compressor 50 configured as described above has a low pressure and low temperature refrigerant gas that is integrally formed on one side of the main body frame 55 through the suction pipe 62a when the piston moves backward. The high-pressure and high-temperature refrigerant gas discharged from the compressor is introduced into the suction lead valve of the suction and discharge valve body 60 from an evaporator (not shown). Is discharged to the external condenser (not shown) from the discharge valve through the discharge muffler 64 integrally formed on the other side of the main body frame 55 and the discharge tube 64a fixedly sealed to the upper or lower case. do.

The noise of the hermetic reciprocating compressor 50 is generated by the reciprocating motion of the piston, the opening and closing shock of the suction and discharge valve body 60, the pulsation of the suction gas and the discharge pressure of the refrigerant gas, and the suction and discharge of the refrigerant gas. In order to reduce noise due to pressure pulsation, the refrigerant gas introduced into the suction pipe 62a is sucked into the cylinder through the suction muffler 62 while being charged inside the upper and lower cases, and the refrigerant compressed in the cylinder is discharged muffler. It discharges to the discharge pipe 64a through 64.

On the other hand, the electric motor portion is composed of a stator and a rotor which is fixed to the lower portion of the main frame 55 and rotates with a gap between the stator, the rotor is fixed to the crankshaft rotates to the main frame 55 to rotate together Possibly supported.

The eccentric shaft 57 is formed at the end of the crank shaft of the electric motor by protruding the eccentric shaft 57 from the top of the main body frame 55 by installing a connecting rod and a shaft and connecting the piston to the eccentric shaft 57. The piston reciprocates as much as the eccentric rotation of. In addition, an external power source is applied to the winding coil of the stator of the motor unit by installing an external terminal 70 that is hermetically fixed to the upper and lower cases.

For the smooth operation of the compressor and drive motor operated as described above to form a refrigeration oil storage tank in which the refrigeration oil is stored at the bottom of the lower case and suctioned to the upper along the lubricating oil supply groove of the crankshaft to supply the refrigeration oil to each lubrication part Lubricate.

The discharge muffler 64 in which the refrigerant gas, which is converted into a high temperature and high pressure state by the action of the cylinder, is discharged, as shown in FIG. 2, while the main body frame 55 is made of a casting part. Is formed in the discharge chamber 604 is formed, and the discharge muffler cover 605 having the fastening hole 604 is mounted on the upper surface of the discharge chamber 604, and then the fastening hole with the washer 606 and the fixing bolt 608. After insertion into the 604, it is configured to be fastened by the fixing portion 602 of the discharge chamber 604.

The washer 606 is to be installed to prevent the leakage of the high-temperature, high-pressure refrigerant gas between the fixing bolt 608 fastened to the insertion hole 604 of the discharge muffler cover 605, the insertion hole 604 When the fastening bolt 608 is not properly fastened when the refrigerant gas is leaked through the insertion hole 604, the washer frequently occurs, and the washer 606 is fastened with the fastening bolt 608 one by one during the fastening process. As a result, the assembly process has also been a cumbersome problem, resulting in a material cost increase.

Accordingly, the present invention has been made in order to solve the above problems, and easy to fasten the discharge muffler cover of the discharge muffler for discharging the refrigerant gas converted to high temperature and high pressure by the cylinder compression action of the hermetic reciprocating compressor without additional components. The purpose is to reduce the cost of materials and ease the assembly process by removing parts.

The present invention for achieving the above object is to form a discharge muffler integrally with the main frame, but the discharge muffler is formed with a discharge chamber formed with a fixed portion to the bottom surface and the discharge muffler cover formed with an insertion hole on the upper side is fixed bolt; In the hermetic reciprocating compressor fastened to the fixed portion, the insertion hole is tapered in the upper portion and narrow in the lower diameter, characterized in that the tapered coupling portion is formed on the bottom of the head of the fixing bolt to match the insertion hole.

Figure 1a is a schematic exploded cross-sectional view showing a state in which the present invention is installed.

1b is a cross sectional view according to FIG. 1a;

Figure 2 is a sectional view showing the main part showing a state in which the conventional discharge muffler cover is fastened to the discharge muffler.

3 is a schematic plan view of a typical hermetic reciprocating compressor;

Explanation of symbols on main parts of drawings

10: insertion hole 20: coupling portion

55: main frame 64: discharge muffler

605: discharge muffler cover 608: fixing bolt

Hereinafter, a preferred embodiment of the present invention by the accompanying drawings as follows.

Figure 1a is a schematic exploded cross-sectional view showing a state in which the present invention is installed, Figure 1b is a combined cross-sectional view according to Figure 1a, the discharge muffler 64 is formed integrally with the main body frame (see Figure 3) 55, The discharge muffler 64 has a discharge muffler cover 605 in which a discharge chamber 604 having a fixing part 602 is formed at a bottom surface thereof, and a tapered insertion hole 10 having a wide upper portion and a narrower lower diameter thereof is formed thereon. The mounting bolt 10 of the discharge muffler cover 605 is formed in the insertion hole 10 of the head of the fixing bolt 608 and the tapered coupling portion 20 is formed to match the insertion hole 10. Is inserted into the fixed part 602 of the discharge chamber 604 and is fastened.

The operation and effects of the present invention configured as described above will be described in more detail with reference to FIGS. 1A, 1B, and 3 as follows.

First, the operation relationship between the low pressure and low temperature refrigerant gas during the backward movement of the piston as in the prior art through the suction pipe 62a to the suction muffler 62 formed integrally on one side of the main body frame (55) (not shown) And the high-pressure / high-temperature refrigerant gas discharged from the compressor during the forward movement of the piston is discharge valve of the suction and discharge valve body (60). From the discharge through the discharge muffler 64 integrally formed on the other side of the main body frame 55 and the discharge tube (64a) to be sealed to the upper or lower case is sent to an external condenser (not shown).

As shown in FIGS. 1A and 1B, the discharge muffler 64 for discharging the high-temperature / high pressure refrigerant gas is tapered with a wide upper portion and a narrower lower diameter on an upper side of the discharge chamber 604 in which the fixing portion 602 is formed. The discharge muffler cover 605 in which the jin insertion hole 10 is formed is mounted, and the insertion hole 10 of the discharge muffler cover 605 is aligned with the insertion hole 10 at the bottom of the head of the fixing bolt 608. A fixing bolt 608 having a tapered coupling part 20 is inserted into the fixing part 602 of the discharge chamber 604 and fastened.

As described above, the insertion hole 10 of the discharge muffler cover 605 and the coupling part 20 of the fixing bolt 608 are matched and tightly coupled to each other, thereby eliminating the problem of leaking into the conventional insertion hole 604. The washer 606, which was fastened together with the fixing bolt 608, may be omitted in order to prevent leakage, thereby reducing cost and of course, one assembly process may be omitted, thereby simplifying the assembly process.

As described above, the insertion hole of the discharge muffler cover and the fixing bolt for fastening the taper may be fastened to be in close contact with each other, thereby shortening the assembly process and reducing material costs due to component deletion. will be.

Claims (1)

In the sealed reciprocating compressor in which a discharge muffler is integrally formed with the main frame, and the discharge muffler is formed with a discharge chamber in which a fixing part is formed at a bottom surface thereof, and a discharge muffler cover having an insertion hole formed thereon is fastened and fixed to the fixing part with a fixing bolt. The insertion hole 10 has a wider upper portion and a lower diameter tapered shape, and a tapered coupling portion 20 is formed at the bottom of the head of the fixing bolt 608 to match the insertion hole 10. Fixing device for discharge muffler cover of hermetic reciprocating compressor.