KR100217046B1 - Flapper typed outlet valve assembly of airconditioner - Google Patents

Abstract

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

The flapper relief valve assembly of the compressor is provided to be sealed to the upper surface 13 of the cylinder block 13, and has at least a discharge port 41 'leading to the cylinder chamber 13', and has an upper valve accommodating portion 51 '. Valve plate 51 is formed; One end of the valve plate 51 is fixedly inserted into the upper valve receiving portion 51 'of the valve plate 51 so as to open and close the discharge port 41' of the valve plate 51 according to the internal pressure of the cylinder 13 at the other end. A wrapper-type discharge valve 52; A backing spring 57 formed elastically restricting the opening degree of the other end of the discharge valve 52 at the upper portion of the discharge valve 52 and inserted into the valve receiving portion 51 'and fixed at both ends. ; In addition, a stopper 56 fixedly restricting the opening degree of the other end of the discharge valve 52 is formed at the upper portion of the backing spring 57 and fixed to the cylinder block 13 together with the valve plate 51. The backing spring 57 is fixed at both ends in the valve receiving portion 51 ', and the discharge valve 52 is fixed at one end at one end in the valve receiving portion 51' by the fixing protrusion 55. It is formed to be discharged from the stopper 56, it characterized in that it comprises a valve cover 54 to form a discharge chamber.

Description

Flapper Type Discharge Valve Assembly of Compressor

The present invention relates to a compressor, and more particularly, to a compressor having a flapper discharge valve assembly, in which a simple structure reduces the loss of the discharge valve, thereby improving the performance of the compressor and further improving the volumetric efficiency and manufacturing labor. A flapper discharge valve assembly of an extruder can be reduced.

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 the 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. While repeating such a refrigeration cycle, the inside of the refrigerator is continuously supplied with cold air, which brings about a desired freezing effect.

Normally, the compressor for a domestic refrigerator is mainly installed in the lower part of the refrigerator, sealed in a case together with its driving electric motor, mainly in a single-stage reciprocating type, and the internal structure in a state where the upper case is removed in FIG. 1 is shown in plan view.

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 different from each other. At predetermined intervals, appropriate dust and soundproofing means, for example compression springs or leaf springs, are supported on the upper and lower cases 12 and 11 via the frame 24 at the bottom or side.

The above-mentioned reciprocating compressor is composed of a cylinder block 13 fixed to the upper portion of the frame 24 horizontally in FIG. 1 and a piston 14 reciprocally inserted into a cylinder therein (see FIG. 2). The 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 by the reciprocating motion of the piston 14, and the high pressure and high temperature refrigerant gas is discharged. do. The suction and discharge valve 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 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 the inlet muffler 16, which is introduced from the external evaporator (not shown) into the suction lead valve of the suction discharge valve 15, and discharged from the compressor during the forward movement of the piston 14. The refrigerant gas flows from the discharge valve of the suction and discharge valve 15 through the discharge pipe 23 'and the discharge pipe connecting pipe 23 which is hermetically fixed to the upper or lower cases 12 and 11. (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 noise 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 suction of the refrigerant gas, the pulsation of the discharge pressure, and the like. The refrigerant gas introduced into the suction pipe (connecting pipe) 22 to reduce the noise caused by the pulsation of the suction and discharge pressure of the suction suction muffler 16 is filled inside the upper and lower cases 12 and 11. The refrigerant is sucked into the cylinder 13, and the refrigerant 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 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). The former 19 is fixed to the rotation shaft 20 and possibly 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, the winding coil of the stator 18 of the electric motor is applied to an external power source via the upper and lower cases 12 and 11 and the external terminal 18 'which is fixedly closed.

In order to smoothly operate the compressor and the driving motor operating as described above, a coolant oil storage tank 25 stored in the freezer oil 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 and 4 show an example of the structure of a conventional flapper discharge valve in detail. The flapper discharge valve system includes a valve plate member 110, a discharge valve 123, a backing spring 122, and a stopper member 121.

The valve plate member 110 is provided with a discharge port 114 which communicates with the inside of the cylinder 103, and is installed to open and close the discharge valve 123 to discharge the high pressure gas from the upper part of the discharge port 14. The backing spring 122 is installed on the upper part of the discharge valve 123 to elastically limit the opening and closing area thereof, and the stopper member 121 moves the discharge valve 123 and the backing spring 122 into position. Restrict to maintain

On the upper surface of the valve plate member 110, a first accommodating portion 111 formed to accommodate the stopper member 121, and the backing spring 122 and the discharge under the first accommodating portion 111 A second receiving part 112 formed to receive the valve 123, a support space 113 formed to open and close the discharge valve 123 smoothly under the second receiving part 112, and the support space A discharge port 114 having an end portion protruding to correspond to the height of the second accommodating part 112 is formed at a predetermined position of the 113 to be configured to minimize the volume of the discharge port 114. 3 and 4, protrusions 125 and 124 are protruded from one end of the discharge valve 123 and the backing spring 122, respectively, and the third accommodating part 112 includes The support 116 is formed to accommodate the protrusions 125 and 124 protruding from the discharge valve 123 and the backing spring 122, respectively, so that the discharge valve 123 and the backing spring 122 flow. It is configured to work without.

However, as described above, the first accommodating part 111, the second accommodating part 112, the support space 113, and the discharge port 114 are formed on the upper surface of the valve plate member 110 in a stepped manner. Therefore, the airtightness and strength at the time of compression and the minimum thickness required for sintering molding are required, and when formed in the step shape as described above, the minimum thickness is determined by the support space 113 according to the airtightness and strength at the time of compression and sintering molding There is a problem that the lower limit of the volume of the discharge port 114 is limited.

In addition, in the above-described structure, the stopper member 121 is elastically inserted and fixed to the first accommodating portion 111 in the lateral direction of both ends, so that the stopper member 121 is easily detached and is easily flowable. Since the valve 123 may not be stably maintained, the stability or reliability of the valve opening and closing operation may be lowered, resulting in problems such as noise and vibration, and also affecting the life of the valve. In addition, in the material surface, the elastic material is limited, and the slits formed in the mass production have a width of about 1 mm, so that in the press work, the cutting punch is frequently repaired or damaged due to the wear of the punch during processing or press work. There is also a problem of deterioration.

Accordingly, the present invention is to solve the above-described problems, by reducing the volume of the discharge port in a simple structure to reduce the loss of the discharge valve and to improve the performance of the compressor, further improving the assembly and opening and closing operability of the valve It is an object to provide a flapper discharge valve assembly of a compressor.

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 discharge valve assembly of a conventional compressor.

4 is an exploded perspective view of the discharge valve assembly of FIG.

5 is a partially enlarged cross-sectional view of a flapper discharge valve assembly of the compressor of the present invention.

6 is an exploded perspective view of the discharge valve assembly of FIG.

7 is a bottom view of the valve cover of the discharge valve assembly of FIG.

* Explanation of symbols for main parts of the drawings

10 compressor 11 lower case

12: upper case 13: cylinder

14 piston 15 suction and discharge valve assembly

16: suction muffler 17: totz muffler

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 reservoir 51: valve plate

52: flapper discharge valve 56: stopper

54: valve cover 55: fixing protrusion

55 ': Insertion protrusion 57: Back key spring

In order to achieve this object, the present invention is directed to a compressor having a flapper-type discharge valve assembly fixed to a cylinder block to seal an upper portion of a cylinder chamber and opened and closed according to the reciprocating motion of a piston in the cylinder chamber. The wrapper-type discharge valve assembly includes: a valve plate installed to be sealed to an upper surface of the cylinder block and having at least a discharge port through the cylinder chamber, and a valve accommodating portion formed on the upper surface; A flapper discharge valve having one end fixedly inserted into an upper valve receiving portion of the valve plate to open and close the discharge port of the valve plate according to the internal pressure of the cylinder at the other end; A backing spring elastically restricting the degree of opening of the other end of the discharge valve at an upper portion of the discharge valve, inserted into the valve receiving portion, fixed at both ends, and formed of an elastic material; And a stopper fixedly restricting the opening degree of the other end of the discharge valve at the upper portion of the backing spring and fixed to the cylinder block together with the valve plate, wherein the backing spring is provided at both ends in the valve receiving portion and the discharge. The valve is characterized in that it comprises a valve cover which is formed to be discharged from the stopper fixed projection for pressing and fixing at one end in the valve receiving portion, and forms a discharge chamber.

In addition to being pressed and fixed by the fixing protrusions formed at both sides of the stopper, openings inserted into the insertion protrusions and fixed firmly may be formed at both ends of the backing spring and one end of the discharge valve, respectively.

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

5 to 7 show the structure of the flapper discharge valve assembly of the compressor according to the invention in detail.

5 to 7, the flapper discharge valve assembly includes a valve cover 54 in which a valve plate 51, a flapper discharge valve 52, a backing spring 57, and a stopper 53 are integrally formed. It consists of.

The valve plate 51 is arranged to be closed on the upper surface 13 of the cylinder block 13, as shown in FIG. 5, and a discharge port 41 'is formed for communicating the cylinder chamber 13' to the discharge chamber. The valve seating valve 51 'for accommodating the flapper discharge valve 52 and the backing spring 57 is formed in the upper surface, and the valve seat in which the discharge valve 52 is seated around the discharge port 41'. The part 41 is formed.

In FIG. 5, the flapper discharge valve 52 accommodates the upper valve of the valve plate 51 to open and close the discharge port 41 'of the valve plate 51 according to the internal pressure of the cylinder 13 at the other end. One end is fixedly inserted into the part 51 '.

In addition, the backing spring 57 is inserted into the valve receiving portion 51 ′ and fixed at both ends to elastically limit the degree of opening of the other end of the discharge valve 52 at the top of the discharge valve 52. It is formed of ash.

In addition, the valve cover 54 is fixed to the upper surface 13 of the cylinder block 13 with a blister plate 51 in the middle so as to form a discharge chamber to be sealed at the upper portion of the discharge port 41 '. In addition, in FIG. 5, the valve cover 54 is fixed to the upper surface 13 of the cylinder block 13 so that the flapper discharge valve 52 of the flapper type discharge valve 52 in the valve receiving portion 51 'of the valve plate 51 can be secured. One end and both ends of the backing spring 57 are configured to be fixed between the valve plate 51 and the valve cover 54. In addition, a stopper 56 is formed on the lower surface of the valve cover 54 to restrict the opening degree of the other end of the discharge valve 52 at the upper portion of the backing spring 57, and the backing spring 57 is formed on the valve. At both ends in the accommodating portion 51 'and the discharge valve 52, a pair of fixing protrusions 55 pressurized and fixed at one end in the valve accommodating portion 51' is formed to protrude from the stopper 56. . The pair of fixing protrusions 55 are preferably formed to be inserted into the valve receiving portion 51 'of the valve plate 51, so that the assembly can be easily assembled.

In addition, as shown in detail in FIGS. 5 to 7, an insertion protrusion 55 ′ is formed to protrude from the fixing protrusion 55 formed on both sides of the stopper 56, and the insertion protrusion 55 ′ is formed on the insertion protrusion 55 ′. Openings 57 'and 52' which are inserted and firmly fixed are formed at both ends of the backing spring 57 and one end of the discharge valve 52, respectively.

The detailed assembly and operation of the flapper-type discharge valve assembly of the compressor according to the embodiment of the present invention configured as described above will be described with reference to FIGS. 5 to 7 as follows.

In the above-described wrapper-type discharge valve assembly, when the insertion protrusion 55 'is not formed in the valve cover 54, the valve plate 51 is simply disposed at a predetermined position on the upper surface 13 of the cylinder block 13. After discharging the valve 52 and the backing spring 57 in the valve receiving portion 51 ′ of the valve plate 51, the valve cover 54 is placed on the upper side of the valve plate 51. 13), and when the insertion projection 55 'is formed, the backing spring 57 and the flapper-type discharge valve 52 are opened in order to respectively open the openings 57' and 52 'of the valve cover 54 And inserting the valve into the fixing protrusion 55 'of the valve plate 51 and inserting the valve acceptor 51' into the fixing protrusion 55 of the valve cover 54. Assembly is completed by fixing to (13).

In the flapper discharge valve assembly of the compressor assembled as described above, as the piston 14 moves forward in the cylinder chamber 13 ', the pressure in the cylinder chamber 13' is reduced in pressure in the discharge chamber of the valve cover 54. It becomes larger so that the discharge port 41 'of the valve plate 51 can be opened by bending and rotating upward in FIG. 5 against its elastic force about the end where the flapper discharge valve 52 is fixed. The compressed refrigerant gas in the cylinder chamber 13 'is discharged to the discharge chamber. In the case of the present invention, the discharge valve 52 is firmly fixed by the valve cover 54 so that the discharge valve 52 can be opened quickly without slipping.

Then, the flapper-type discharge valve 52 is first elastically limited by the backing spring 57 so as not to bend or deform excessively by the pressure of the refrigerant gas discharged, and by the stopper 53 Repentance is fixedly limited. At this time, the backing spring 57 is also firmly fixed by the fixing protrusion 55 and the insertion protrusion 55 ', so that the opening operation of the flapper discharge valve 52 is performed without slipping or slipping, and the discharge valve is made. The open impact of (52) is sufficiently absorbed.

Thereafter, at the top dead center of the piston 14 or in the reverse direction, the flapper discharge valve 52 closes the discharge port 41 'quickly by its elastic force and the elastic force of the backing spring 57. When the piston 14 moves backward, the pressure of the cylinder chamber 13 'is lower than that of the discharge chamber, so that the closed state of the flapper discharge valve 32 is naturally maintained.

By assembling and operating as described above, the stopper 53 and the fixing protrusion 55 or the insertion protrusion 55 'formed on the stopper 53 formed on the valve cover 54 without slipping or slipping are also easily assembled. It is possible to easily assemble the discharge valve 52 and the backing spring (57), and to securely fix the discharge valve (52), it is possible to quickly open the discharge valve 52 with the improvement of assembly and reduction of parts, In addition, the closing of the valve is also performed quickly after the opening is restricted by the rigidly fixed backing spring 57 and the stopper 53.

According to the configuration and operation of the flapper discharge valve assembly of the compressor according to the embodiment of the present invention described above, the stopper 53 is integrally formed in the valve cover 54 to reduce the parts and the assembling property. It is possible to improve the number of fixing projections 55, the insertion projections 55 'formed on the lower surface of the stopper 53, the backing springs 57, and the flapper discharge valves 52 (52', 57 '). The discharge valve is accurately opened and closed without slipping or slipping of the flapper discharge valve 52 and the backing spring 57, thereby reducing the loss of the valve due to the opening and closing delay, thereby improving the performance of the compressor, and furthermore, the slip valve. And reduction of noise or vibration due to slipping can be achieved.

Claims (2)

A compressor having a flapper-type discharge valve assembly fixed to the cylinder block 13 to seal an upper portion of the cylinder chamber 13 'and opened and closed according to the reciprocating motion of the piston 14 in the cylinder chamber 13'. The flapper discharge valve assembly of the present invention comprises: at least a discharge port 41 'which is installed to be sealed to the upper surface 13 of the cylinder block 13 and communicates with the cylinder chamber 13' and has a valve receiving portion ( A valve plate 51 formed with 51 '); A flapper with one end fixedly inserted into an upper valve receiving portion 51 ′ of the valve plate 51 so as to open and close the discharge port 41 ′ of the valve plate 51 according to the internal pressure of the cylinder 13 at the other end. A type discharge valve 52; A backing spring 57 formed elastically restricts the degree of opening of the other end of the discharge valve 52 at the upper portion of the discharge valve 52 and is inserted into the valve receiving portion 51 'and fixed at both ends. ); In addition, a stopper 56 fixedly restricting the opening degree of the other end of the discharge valve 52 is formed at the upper portion of the backing spring 57 and fixed to the cylinder block 13 together with the valve plate 51. The backing spring 57 is fixed at both ends in the valve receiving portion 51 ', and the discharge valve 52 is fixed at one end in the valve receiving portion 51' to fix the stopper 55. 56. A flapper discharge valve assembly of a compressor, characterized by comprising a valve cover (54) formed protruding from the valve and forming a discharge chamber. According to claim 1, Not only is pressed by the fixing projections 55 formed on both sides of the stopper 56, but also the insertion projection (55 ') is formed to protrude from the fixing projection 55, the insertion A flapper discharge of the compressor, characterized in that the openings 57 'and 52' are inserted into the protrusions 55 'and fixedly formed at both ends of the backing spring 57 and one end of the discharge valve 52, respectively. Valve assembly.

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