KR19980077161A - Compressor with fixed band integrated valve cover - Google Patents

Abstract

The present invention provides a compressor having a fixed band integrated valve cover.

The compressor having the fixed band integrated valve cover includes a compressor (10) in which a suction muffler (16) having a neck (16a) and a discharge port (16b) is connected to the suction port (37b) side of the valve assembly (15): The valve assembly 15 is fixed to the cylinder block 13, the discharge chamber 37a is formed at the inner side, and fixed band portion 37 for fixing the suction muffler 16 by being cut and bent at the suction port 37b side. ') Is formed, characterized in that it comprises a valve cover (37).

Accordingly, a separate fixing band 16 'and one bolt or screw are unnecessary, and do not need to be managed separately, so that only one screw can be tightened to securely tighten the suction muffler. And productivity can be improved and manufacturing cost can be made low.

Description

Compressor with fixed band integrated valve cover

The present invention relates to a compressor having a fixed band integrated valve cover, and more particularly, by cutting the valve cover and bending it to form a fixed band portion, the suction muffler can be fixed in a simple structure, thereby improving productivity and inexpensive manufacturing cost. It relates to a compressor having a fixed band integral valve cover.

Compressors typically convert mechanical energy into compressive energy of a compressive fluid, which are reciprocating, rotary and turbo. When such a compressor is used for a refrigerator, the saturated steam of a low boiling point refrigerant having the inside of the refrigerator as a low heat source and the outside as a high heat source is compressed to a high pressure and flowed to a condenser. In the condenser, latent heat of evaporation is released from the high-pressure and high-temperature refrigerant to a high heat source outside the refrigerator, causing a phase change to a liquid refrigerant, and the liquid refrigerant is throttled to low pressure and low temperature through an expansion valve. It enters the evaporator. The low pressure and low temperature refrigerant in the evaporator absorbs latent heat from the low heat source inside the refrigerator in the liquid phase, thereby causing a phase change to the saturated steam refrigerant, and then flowing into the compressor described above to form a refrigeration cycle. In the middle of repeating such a refrigeration cycle, the inside of the refrigerator is continuously supplied with cold air to bring about the desired refrigeration (long) effect.

Normally, the compressor for a domestic refrigerator is mainly installed in the lower part of the refrigerator while being closed in a case together with its driving electric motor in a single stage reciprocating type, and the internal structure of the state in which the upper case is removed is shown in plan view in FIG.

In the reciprocating compressor 10, the electric motor and the compressor are hermetically housed in the upper and lower cases 12 and 11 for soundproofing and dustproofing, and the upper and lower cases 12 and 11 are predetermined. At intervals of, it is supported by means of suitable dust and soundproofing means, for example compression springs or leaf springs, through the frame 24 at the lower and side portions thereof in the upper and lower cases 12, 11.

The above-mentioned reciprocating compressor has a cylinder block 13 fixed to the upper part of the frame 24 horizontally in FIG. 1 and a piston 14 reciprocally inserted into the cylinder chamber 13 'inside thereof ( 2, the low pressure and low temperature refrigerant gas is sucked through the suction and discharge valve assembly 15 provided at the left end of the cylinder block 13 by the reciprocating motion of the piston 14. The gas is discharged. The suction and discharge valve assembly 15 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 assembly 15 is double-sided. It is opened and closed passively by the pressure difference acting on.

In the reciprocating compressor configured as described above, the suction pipe (connecting pipe) 22 in which the low pressure and low temperature refrigerant gas is hermetically fixed to the upper or lower cases 12 and 11 during the backward movement of the piston 14. And a high pressure discharged from the external evaporator (not shown) via the suction muffler 16 to the suction lead valve of the suction and discharge valve assembly 15, and discharged from the compressor during the forward movement of the piston 14, The high temperature refrigerant gas is externally discharged from the discharge valve of the suction and discharge valve assembly 15 through the discharge pipe 23 'and the discharge pipe connecting pipe 23 fixedly sealed to the upper or lower cases 12 and 11. To a condenser (not shown). The refrigerant charging pipe 22 'is hermetically fixed to the lower case 11, and initially filled with refrigerant gas, and then sealed.

Compressor noise, which occupies most of the operation noise of the refrigerator, is generated by reciprocating motion of the piston 14, opening and closing shock of the suction and discharge valve assembly 15, pulsation of the refrigerant gas, and pulsation of the discharge gas. And a refrigerant gas introduced into the suction pipe (connecting pipe) 22 in order to reduce noise due to pulsation of the discharge pressure, while being filled in the upper and lower cases 12 and 11, and the cylinder through the suction muffler 16. The refrigerant sucked in 13 and compressed in the cylinder 13 is discharged to the discharge pipe 23 'through the discharge muffler 17.

On the other hand, the electric motor is composed of a stator 18 fixed to the lower part of the frame 24, and a rotor 19 rotating with a gap between the stator 18 (see Fig. 2), the rotor 19 is fixed to the rotating shaft 20 and rotatably supported by the frame 24 to rotate together. By forming the eccentric shaft 21 at the end of the rotating shaft 20 of the electric motor to the upper portion of the frame 24 to connect the piston 14 to the eccentric shaft 21 through the connecting rod and the number of shafts, The piston 14 reciprocates by the amount of eccentric rotation of the eccentric shaft 21. In addition, an external power source is applied to the winding coil of the stator 18 of the electric motor via an external terminal 18 'which is hermetically fixed to the upper and lower cases 12 and 11.

In order to smoothly operate the compressor and the driving motor operating as described above, a coolant oil storage tank 25 in which coolant oil is stored is formed at the bottom of the lower case 11, and the lubricating oil supply groove 20 'of the rotating shaft 20 is formed. As it is sucked into the upper portion, the refrigerant oil is supplied to each lubrication part to perform lubrication.

3 shows the above-described conventional suction muffler fixing structure as a partial perspective view.

The suction structure of the suction muffler 16 uses a separate fixing band 16 'to insert and arrange the suction muffler 16 into the suction port from the discharge port 16b, and the neck 16a and the discharge port 16b. The fixing band 16 'is fixed to the valve cover 17' by screws to bolts 16 so as to cover the gaps between the < RTI ID = 0.0 >

However, as described above, the suction muffler fixing structure requires a separate fixing band 16 ', which has to be managed separately and has two screw fastenings.

Accordingly, the present invention is to solve the above-described problems, by cutting the valve cover and bending it to form a fixed band portion can be fixed to the suction muffler in a simple structure can be improved productivity and low manufacturing cost fixed It is an object to provide a compressor having a band integral valve cover.

1 is a plan view showing the internal structure of a hermetic reciprocating compressor;

2 is a cross-sectional view taken along line 2-2 of FIG. 1 showing the internal structure of the hermetic compressor;

Figure 3 is a partial perspective view showing a conventional suction muffler fixing structure,

Figure 4 is a partial perspective view showing a suction muffler fixing structure according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10 compressor 11 lower case

12: upper case 13: cylinder block

14 piston 15 suction and discharge valve assembly

16: suction muffler 16a: neck

16b: discharge port 16 ': fixed band

17: discharge muffler 17 ', 37: valve cover

18: stator (stator) 19: rotor (rotor)

20: axis of rotation 21: eccentric shaft

22: suction pipe (connecting pipe) 23: discharge pipe connecting pipe

23 ': discharge pipe 24: frame

25: refrigerator oil storage tank 37 ': fixed band portion

37: fixing part

In the compressor having a fixed band integrated valve cover according to an embodiment of the present invention, a suction muffler having a neck and a discharge port is connected to a suction port side of the valve assembly. The valve cover is fixed to the block, the discharge chamber is formed on the inside, and is cut and bent at the suction port side to include a valve cover formed integrally with a fixing band part for fixing the suction muffler.

It is preferable that a fixing part having a hole in which a bolt for fixing the suction muffler is securely formed at one end of the free end of the fixing band part is formed, and the fixing part has an inclination angle (θ) within about 3 ° which is raised toward the discharge port side. By being formed in the suction inlet and the discharge port to the suction port firmly, it can be fixed to maintain the airtight.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation of the embodiment of the present invention.

Figure 4 shows a suction muffler fixing structure according to an embodiment of the present invention as a partial perspective view.

In Fig. 4, the suction muffler 16 is shown by a dashed line, and is inserted and fixed to the suction port 37b side of the valve assembly 15 to maintain the airtight state.

The suction muffler fixing structure is performed by a fixing band portion integrally formed in the valve cover according to the present invention.

That is, the valve cover 37 is partially cut and bent as shown in FIG. 4 at the suction port 37b to form a fixing band part 37 ′ for fixing the suction muffler 16. The fixing band portion 37 'formed as described above may fix the suction muffler 16 by inserting the discharge port 16b of the suction muffler 16 without a separate fixing means depending on its elastic strength.

In addition, a fixing portion 37 having a hole in which a bolt for firmly fixing the suction muffler 16 may be formed at one end of the free end of the fixing band portion 37 ′. . In this case, the fixing part 37 requires a separate screw or bolt, and a female thread must be processed to the flat plate 38, the valve plate 39, or the cylinder block 13 under the valve cover 37. The flat plate 38 is brazed under the valve cover 37 to increase the flatness and strength of the lower surface of the valve cover 37.

In addition, the fixing part 37 may be formed at an inclination angle θ within about 3 ° which is increased toward the discharge port 16b.

Of course, the valve cover 37 serves to fix the valve assembly 15 to the cylinder block 13 as in the prior art, the discharge chamber 37a is formed inside.

The detailed assembly and operation of the compressor having a fixed band integrated valve cover according to an embodiment of the present invention configured as described above will be described with reference to FIG. 4.

By slightly lifting the fixing band portion 37 'of the valve cover 37 within its elastic range, the discharge port 16b of the suction muffler 16 can be inserted. Thereafter, the suction muffler 16 is firmly assembled to the suction port 37b of the valve assembly 15 by simply fastening the screw or bolt through the hole of the fixing part 37 to the female screw in the lower part, and the suction stroke of the piston. The confidentiality state can be maintained.

In addition, as the suction muffler 16 moves away from the fixing band portion 37 'toward the discharge port 16b, the holding force weakens little by little. When the fixing portion 37 forms an inclined surface, the discharge port 16b side thereof. It can be fixed more strongly so that the airtight state at the suction port 37b can be maintained.

The above-described valve cover 37 may extend in front of the discharge chamber 37a so that the discharge muffler may be integrally formed. However, when a separate discharge muffler is provided, the above-described present invention may be applied to fixing the discharge muffler. have.

According to the configuration of the compressor having a fixed band integrated valve cover according to an embodiment of the present invention described above, and its action, the fixed band portion 37 ′ is integrally formed with the valve cover 37 to separate the fixed band 16. ') And one bolt or screw are unnecessary, no separate management is required, and a simple structure allows fastening of the suction muffler with a simple structure, improving productivity and increasing manufacturing costs. This can be inexpensive.

While the invention has been shown and described with respect to certain preferred embodiments thereof, it will be understood that the invention may be variously modified and modified without departing from the spirit or scope of the invention as set forth in the following claims. It will be readily apparent to one of ordinary skill in the art that it can be used.

Claims (3)

In the compressor 10, in which the suction muffler 16, in which the neck 16a and the discharge port 16b are formed, is connected to the inlet 37b side of the valve assembly 15: The valve assembly 15 is fixed to the cylinder block 13, the discharge chamber 37a is formed at the inner side, and fixed band portion 37 for fixing the suction muffler 16 by being cut and bent at the suction port 37b side. Compressor having a fixed-band integrated valve cover, characterized in that it comprises a valve cover (37) formed integrally with '). The fixing part (37) according to claim 1, wherein a fixing part (37) having a hole in which a bolt for fixing the suction muffler (16) is fixed at one end of the free end of the fixing band part (37 ') is formed. Compressor with band integrated valve cover. 3. The compressor having a fixed band integrated valve cover according to claim 2, wherein the fixing part (37) is formed at an inclination angle (θ) within about 3 ° which is raised toward the discharge port (16b) side.