KR19980037787A - Flapper Valve Assembly of Compressor - Google Patents

Abstract

The present invention provides a flapper valve assembly of a compressor.

The valve assembly includes a valve plate 31 having a discharge port 31 'and a suction port 31 and a rivet hole 31a formed to be spaced apart from the discharge port 31'; A flapper suction valve 36 for opening and closing the inlet 31 of the valve plate 31 according to the internal pressure of the cylinder 13; A flapper discharge valve 32 for opening and closing the discharge port 31 'of the valve plate 31 according to the internal pressure of the cylinder 13; The valve plate using one end of the rivet hole 33a at the top of the flapper-type discharge valve 32 to elastically limit the opening degree of the other end of the flapper-type discharge valve 32 and to apply elasticity when closing. A back spring 33 fixed to 31; A stopper 34 fixed to the rivet hole 34a so as to fixedly limit the opening degree of the other end of the flapper discharge valve 32 together with the back spring 33 at the top of the back spring 33; The flapper suction valve 36, the flapper discharge valve 32, the back spring 33 and the stopper 34 are inserted into the rivet holes to fix the valve plate 31. It is characterized by consisting of a rivet 35 to be caulked.

Accordingly, not only the manufacturing and assembly labor is reduced, but also the assembly can be easily performed, and misassembly or missing assembly can be removed.

Description

Flapper Valve Assembly of Compressor

The present invention relates to a flapper valve assembly of a compressor, and more particularly to a compressor passing through a flapper valve assembly, the flapper discharge valve and the suction valve is fixed to the valve plate integrally fixed by a rivet cylinder block It relates to a flapper valve assembly of the compressor of the structure fixed to the.

Compressors typically mechanically convert 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.

Typically, a compressor for a domestic refrigerator is mainly installed in a lower part of a refrigerator, closed in a case together with a driving electric motor of a single stage reciprocating type, and an internal structure of a 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 tees 12 and 11 are different from each other. At predetermined intervals, it is supported by means of suitable vibration and sound insulation means, for example compression springs or leaf springs, on the upper and lower cases 12, 11 or via the frame 24 at the sides.

The above-described reciprocating compressor is composed of a cylinder block 13 fixed to the upper portion of the frame 24 horizontally in Figure 1 and a piston 14 reciprocally inserted into the cylinder therein (see Figure 2), By the reciprocating motion of the piston 14, low pressure and low temperature refrigerant gas is sucked through the suction and discharge valves 15 provided at the left end of the cylinder block 13, and high pressure and high temperature refrigerant gas is discharged. The suction and discharge valve 15 is composed of a flapper or lead type thin plate structure which is usually elastic for miniaturization, and the flapper or lead type suction and discharge valve 15 acts on both sides. It is opened and closed passively by the pressure difference.

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 and a high temperature discharged from an external evaporator (not shown) to the suction lead valve of the suction and discharge valve 15 via the suction muffler 16 and discharged from the compressor during the forward movement of the piston 14. The refrigerant gas of the external condenser is passed through the discharge pipe 23 'and the discharge pipe connecting pipe 23 fixedly sealed to the upper and lower cases 12 and 11 from the discharge valve of the suction and discharge valve 15. It is sent out (not shown). The refrigerant charging pipe 22 'is hermetically fixed to the lower case 11, and initially filled with refrigerant gas, and then sealed.

In addition, the compressor noise, which occupies most of the operation sound of the refrigerator, is generated by the reciprocating motion of the piston 14, the opening and closing shock of the suction and discharge valve 15, the pulsation of the refrigerant gas, and the pulsation of the refrigerant gas. In order to reduce noise caused by the pulsation of the suction and discharge pressures, the refrigerant gas introduced into the suction pipe (connecting pipe) 22 is filled in the upper and lower cases 12 and 11 and through the suction muffler 16. The refrigerant sucked into the cylinder 13 and compressed in the cylinder 13 is discharged to the discharge pyr 23 ′ through the discharge muffler 17.

On the other hand, the electric motor is composed of a stator 18 fixedly installed at the lower part of the frame 24, and a rotor 19 rotating with a gap between the stator 18 (see FIG. 2). 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 an example of the structure of the above-described flapper valve assembly 15 in detail. The flapper valve assembly 15 is composed of a flapper suction valve 36 and a flapper discharge valve assembly. The flapper discharge valve assembly includes a valve plate 31 and a flapper discharge valve 32. , Back spring 33, stopper 34, and rivet 35.

The assembly method of the flapper valve assembly of the conventional compressor configured as described above is the valve cover 17, the valve stopper 34, the back spring 33, and the flapper which are discharge mufflers in steps 51 to 56 in FIG. The discharge valve 32, the valve plate 31 and the flapper suction valve 36 are manufactured and provided, and in step 57 the flapper discharge valve 32, the back spring 33 and the stopper 34 are It is fixed and assembled to the valve plate 31 by the rivet 35, and in step 58, step 58 'and step 58, the flapper type suction valve 36, the flapper type discharge valve assembly and the valve cover 17 are sequentially The flapper valve assembly 15 is assembled by being disposed at a predetermined position on the upper surface of the cylinder block 13 'and fixed to the cylinder block 13' by fixing means such as bolts.

However, the flapper valve assembly 15 manufactured and assembled in this way is because the flapper type discharge valve assembly is disposed thereon after the flapper type suction valve is first placed on the cylinder block 13 '. The relative position is changed between the flapper type discharge valve assembly and the flapper type suction valve 36, or the arrangement of the flapper type discharge valve assembly deviates from a predetermined position when the flapper type discharge valve assembly is disposed. Not only is there a problem that easy assembly is very bad, but there is a problem that even if the flapper type suction valve 36 is omitted and assembled, it is not easily understood.

Accordingly, the present invention is to solve the above-mentioned problems, to provide a flapper valve assembly of the compressor that can be easily assembled without erroneous assembly or missing parts in the assembly of the flapper valve assembly of the compressor described above. Has its purpose.

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;

3 is a partially enlarged cross-sectional view showing the structure of a flapper valve assembly of a conventional compressor;

4 is a process chart showing a method of assembling a flapper valve assembly of a conventional compressor;

5 is a partially enlarged cross-sectional view showing the structure of a flapper valve assembly of a compressor according to the present invention;

6 is a process chart showing a cooking method of the flapper valve assembly of the compressor according to the present invention.

* Explanation of main code used in drawing

10 compressor, 11 lower case, 12 upper case, 13 cylinder, 14 piston, 15 suction and discharge valve assembly, 16 suction muffler, 17 discharge muffler, 18 stator (stator), 19 times Electron (rotor), 20: rotating shaft, 21: eccentric shaft, 22: suction pipe (connecting pipe), 23: discharge pipe connecting pipe, 23 ': discharge pipe, 24: frame, 25: refrigeration oil reservoir, 31: valve Plate, 32: flapper discharge valve, 33: back spring, 34: stopper, 35: rivet, 36: flapper type suction valve

To achieve this object, the present invention is directed to a compressor having a flapper suction and discharge valve assembly secured to a cylinder block to seal an upper portion of a cylinder and opened and closed according to the reciprocating motion of a piston in the cylinder. A valve plate disposed to be closed on an upper surface of the block and having a discharge port and a suction port leading to the cylinder, and a rivet hole spaced from the discharge port; A flapper type suction valve which is fixed at one end of the rivet hole on the lower surface of the valve plate and opens at a position corresponding to the discharge port of the valve plate to open and close the inlet of the valve plate according to the internal pressure range of the cylinder; A flapper discharge valve fixed to one end of the rivet hole on the upper surface of the valve plate to open and close the discharge port of the valve plate according to the internal pressure of the cylinder; A back spring fixed to the valve plate by using one end of the rivet hole at the top of the flapper discharge valve to elastically limit the degree of opening of the other end of the flapper discharge valve and to apply elasticity upon closing; A stopper fixed at the upper portion of the back spring with the back spring fixed in the rivet hole to fixedly limit the opening degree of the other end of the flapper discharge valve; And a flap of the compressor, comprising: a flapper suction valve, a flapper discharge valve, a back spring, and a stopper inserted into each of the rivet holes and caulked to fix the valve plate to the valve plate. Provided is a wrapper type valve assembly.

The flapper type suction valve, the flapper type discharge valve, the back spring and the stopper are fixed by rivets and disposed on the upper surface of the cylinder block, and the valve cover which is the discharge muffler is fixed on the upper surface of the cylinder block. The valve, the flapper discharge valve, the back spring and the stopper can be fixed at a predetermined position on the upper surface of the cylinder block, thereby preventing misassembly or omission, and preventing the flapper type suction valve from being displaced. This becomes good.

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

5 shows the structure of a flapper valve assembly of a compressor according to the invention, and FIG. 6 shows an assembly process of the flapper valve assembly of the compressor according to the invention. In FIG. 5, the flapper valve assembly of the compressor according to the embodiment of the present invention includes a flapper suction valve 36, a valve plate 31, a flapper discharge valve 32, a back spring 33, and a stopper ( 34) and rivets (35).

The valve plate 31 is fixed to the upper surface 13a of the cylinder block 13 'as shown in FIG. 3, and has a discharge port 31' and a cylinder 13 for communicating the cylinder 13 with the discharge chamber. A suction port 31 communicating with the suction chamber is formed, and the flapper discharge valve 32, the back spring 33, and the stopper 34 are fixed to the upper surface, and the flapper suction valve 36 is fixed to the lower surface. A rivet hole 31a is formed at one end.

In addition, the flapper type suction valve 36 opens and closes the inlet 31 of the valve plate 31 in accordance with the internal pressure of the cylinder 13 in the rivet hole 36a of the inlet. An opening 36 'which is fixed and installed in the rivet hole 31a of the valve plate 31 at a position corresponding to the discharge port 31' of the valve plate 31 at least larger than the discharge port 31 '. Is formed.

The flapper discharge valve 32 has a valve plate 31 which opens and closes the discharge port 31 'of the valve plate 31 in accordance with the internal pressure of the cylinder 13 at one end of the rivet hole 32a. The rivet hole 31a is fixed and installed by the rivet 35. The back spring 33 elastically restricts the opening degree of the other end of the flapper discharge valve 32 at the upper portion of the flapper discharge valve 32 and applies elasticity upon closing, thereby rapidly discharging the discharge port 31 '. The flapper discharge valve 32 is fixed and installed by the rivet 35 in the rivet hole 31a of the valve plate 31 at one end of the rivet hole 32a so as to close the valve.

The stopper 34 fixedly limits the opening degree of the other end of the flapper discharge valve 32 at the upper portion of the back spring 33 so that the flapper discharge valve 32 can be opened and closed smoothly. The rivet hole 31a of one end of the rivet hole 34a is fixed and installed together with the flapper discharge valve 32 and the back spring 33 by the rivet 35 by the rivet 35. .

The assembly method of the flapper valve assembly of the compressor according to the present invention configured as described above is first shown in Fig. 6, the valve cover 17, the valve stopper 34, which is the discharge muffler in steps 51 to 55 and 56, A back spring 33, a flapper discharge valve 32, a valve plate 31 and a flapper suction valve 36 are manufactured and provided, and the flapper type suction valve 36 and the valve plate 31 are manufactured. , The flapper discharge valve 32, the back spring 33 and the stopper 34 are arranged in such a manner that the rivet holes 36a, 31a, 32a, 33a, 34a are aligned and the rivet holes 36a, 31a, The flapper suction valve 36, the valve plate 31, the flapper discharge valve 32, and the back spring 33 by inserting the rivet 35 through 32a, 33a, 34a and caulking at the end thereof. , The stopper 34 and the rivet 35 are assembled into one flapper valve assembly 15.

In this way, since the rivet holes are assembled together, the flapper type suction valve 36 may not be automatically assembled, and when it is omitted, the flapper type valve assembly 15 may be easily inspected.

Then, in steps 68 and 68 ', the flapper valve assembly 15 and the valve cover 17 are in turn arranged at a predetermined position on the upper surface of the cylinder block 13' and the cylinder block is secured by a fixing means such as a bolt. The assembly of the flapper valve assembly 15 according to the present invention is completed by being fixed to 13 '.

According to the configuration and operation of the flapper valve assembly of the compressor according to the embodiments of the present invention described above, the flapper type suction valve 36 and the flapper type discharge valve 32 integrally rivets (35) By assembling integrally and using the cylinder block 13 ', it is possible to reduce the assembly process by one step and eliminate the possibility of erroneous or missing assembly of the flapper type suction valve 36. It is possible to improve the assemblability.

Claims (2)

A flapper suction and discharge valve assembly 15 fixed to the cylinder block 13 ′ to seal the upper portion of the cylinder 13 and opened and closed according to the reciprocating motion of the piston 14 in the cylinder 13. In the compressor: the discharge port 31 'and the suction port 31, which are arranged to be closed on the upper surface 13 of the cylinder block 13' and communicate with the cylinder 13, are formed apart from the discharge port 31 '. A valve plate 31 having a hole 31a; A valve plate having a discharge port 31 ′ and a suction port 31 through which the suction port 31 of the valve plate 31 passes through the cylinder 13, and a rivet hole 31 a spaced apart from the discharge port 31 ′ ( 31); The inlet 31 of the valve plate 31 is fixed at one end of the rivet hole 36a on the lower surface of the valve plate 31 to open and close according to the internal pressure of the cylinder 13, and A flapper suction valve 36 having an opening 36 'formed at a position corresponding to the discharge port 31'; A flapper discharge valve fixed to the upper surface of the valve plate 31 at one end of the rivet hole 32a to open and close the discharge port 31 'of the valve plate 31 according to the internal pressure of the cylinder 13 ( 32); The valve plate using one end of the rivet hole 33a at the top of the flapper-type discharge valve 32 to elastically limit the opening degree of the other end of the flapper-type discharge valve 32 and to apply elasticity when closing. A back spring 33 fixed to 31; A stopper 34 fixed in the rivet hole 34a so as to fixedly limit the degree of opening of the other end of the back spring 33 and the flapper discharge valve 32 at the top of the back spring 33; And each of the rivet holes 36a, 31a, to fix the flapper type suction valve 36, the flapper type discharge valve 32, the back spring 33 and the stopper 34 to the valve plate 31. A flapper valve assembly of a compressor, characterized in that it consists of rivets 35 inserted and caulked into 32a, 33a, 34a. The flapper type suction valve (36), the flapper type discharge valve (32), the back spring (33) and the stopper (34) are fixed by rivets (35) to prevent the cylinder block (13). The flapper type suction valve 36, the flapper type discharge valve 32, the back spring 33 and the valve cover 17 which is disposed on the top surface and which is a discharge muffler thereon are fixed to the top surface of the cylinder block 13. A flapper valve assembly of a compressor, characterized in that the stopper (34) is fixed at a predetermined position on the upper surface of the cylinder block (13).