KR19980076755A - compressor - Google Patents

Abstract

The present invention provides a compressor having a flapper-type discharge valve assembly having a structure capable of improving compressor efficiency.

The compressor has a single accommodating portion 37 configured to accommodate a discharge valve and a backing spring on an upper surface of the valve plate member 35, and the discharge valve 34 is smoothly disposed on the lower end of the single accommodating portion 37. A free space 41 is formed in the single accommodating portion so as to be opened and closed and restricts the movement of the discharge valve 34, the backing spring 33 and the stopper member 31 at a predetermined position of the free space 41. The fixed protrusion 44 is provided, and the stopper member 31 has an embossed portion 36 installed at one end of the fixed protrusion 44 so as not to interfere with the fixed protrusion 44. One end opposite the embossing portion 36 has a bending portion 39 so that the backing spring 33 flows smoothly, and both ends of the stopper member 31 are fixed to the valve cover 101 to discharge holes. Configured to maximize the efficiency of the compressor by minimizing the volume of 38. It features.

Accordingly, the misalignment is prevented by the asymmetric support part 32, the asymmetrical shape part 33 ', the fixed protrusion part 44, and the insertion holes 42 and 43, and the valve loss due to the opening and closing delay is reduced, and the discharge port ( It is possible to minimize the volume of 38) to maximize the efficiency of the compressor.

Description

compressor

The present invention relates to a compressor, and more particularly to a compressor having a flapper-type discharge valve assembly of the structure that can improve the efficiency of the compressor, can be easily assembled, and can reduce noise, vibration.

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 a desired freezing (jang) effect.

Typically, a compressor for a domestic refrigerator is mainly installed in a lower stage of a refrigerator, which is closed in a case together with a driving electric motor of one stage, and the upper case is removed 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, via the frame 24 at the bottom or side of the upper and lower cases 12, 11.

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 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 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 discharged from the discharge valve of the suction and discharge valve 15 through the discharge pipe 23 'and the discharge pipe connecting pipe 23 fixedly sealed to the upper or lower cases 12 and 11. 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 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 pulsation of the suction gas and the discharge pressure, and the like. 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 charged inside 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 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). 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 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 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 that communicates with the inside of the cylinder 103, and the discharge valve 123 is installed at the upper portion of the discharge port 14 so as to be opened and closed for discharge of the high pressure gas. 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. It is limited to maintain.

The upper surface of the valve plate member 110, the first receiving portion 111 formed to receive the stopper member 121, and the backing spring 122 and the discharge in the lower portion of the first receiving portion 111 The second accommodating part 112 formed to accommodate the valve 123, the support space 113 formed to open and close the discharge valve 123 smoothly under the second accommodating part 112, and the support space. A discharge port 114 having an end portion protruding to correspond to the height of the second accommodating portion 112 is formed at a predetermined position of the 113 so as to minimize the volume of the discharge port 114. 3 and 4, protrusions 125 and 124 are protruded from one end of each of the discharge valve 123 and the backing spring 122, and a support portion (2) is provided in the second receiving portion 112. 116 is formed to accommodate the protrusions 125 and 124 protruding from the discharge valve 123 and the backing spring 122 to operate without the discharge valve 123 and the backing spring 122 flowing. It is configured to be.

However, as described above, the first accommodating portion 111, the second accommodating portion 112, the support space 113, and the discharge port 114 are formed in a stepped shape on the upper surface of the valve plate member 110. 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 the processing surface, the slits formed at both ends have a width of about 1 mm, so that in the press work, repair or breakage due to the machining of the cutting punch or the abrasion of the punch during the press work is frequently performed, which causes a problem of lowering the productivity.

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 compressor having a discharge valve assembly of construction.

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. 3;

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

Figure 6 is an exploded perspective view of the discharge valve assembly of Figure 5;

Explanation of symbols on the 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: discharge muffler

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

20: axis of rotation 21: eccentric shaft

22: suction pipe (connecting pipe) 23; Discharge pipe connector

23 ': discharge pipe 24: frame

25: refrigerator oil storage tank 31: stopper

33: backing spring 33 ': asymmetrical shape

34: flapper discharge valve 35: valve plate

37: single accommodation part 41: free space

44: fixed protrusion 101: valve cover

In order to achieve the above object, a compressor according to the present invention includes a valve plate member having a discharge port, a discharge valve that opens and closes to discharge high pressure gas, and a backing spring that defines an opening and closing area of the discharge valve, and fixes the discharge valve and the backing spring. In the compressor having a valve cover for fixing the stopper member to be formed, a single receiving portion for receiving the discharge valve and the backing spring is formed on the upper surface of the valve plate member, the discharge valve is opened and closed smoothly at the single receiving load end A free space is formed in the single receiving portion so that a fixed protrusion is provided to restrict the movement of the discharge valve, the backing spring and the stopper member at a predetermined position of the free space. At one end of the tongue side, the embossed portion so as not to interfere with the fixed protrusion It is installed, one end opposite the embossing portion has a banding portion to smoothly flow the backing spring, and to secure the both ends of the stopper member with the valve cover to minimize the volume of the discharge port to maximize the efficiency of the compressor Characterized in that configured.

One end of the stopper member does not interfere with the fixing protrusion, and an embossing portion is installed so that the height when assembled is the same as the height of the valve plate member, and one end of the stopper member opposite to the fixing protrusion has a smooth backing spring. A banding part bent to flow may be installed, and both ends of the stopper member are manufactured to be the same height as the height of the upper side of the valve plate member after assembling to a single receiving portion of the valve plate member. The stopper member may be formed in a structure in which both ends of the stopper member are pressed and fixed by the valve cover, after being assembled to the single receiving portion of the valve plate member, and the backing spring is incorrectly assembled to the single receiving portion. An asymmetrical shape for preventing may be formed. In this case, one end of the valve plate member is provided with an asymmetric support for preventing misassembly and flow, thereby being reliably prevented from misassembly, and the discharge valve and the backing spring are operated without flow. The free space is formed to have a shape similar to the outer shape of the discharge valve to facilitate the opening and closing of the discharge valve.

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

5 and 6 show in detail the structure of the flapper discharge valve assembly of the compressor according to the present invention.

5 and 7, the flapper discharge valve assembly includes a valve cover 101, a valve plate member 35, a discharge valve 34, a backing spring 33, and a stopper member 31. .

The valve plate member 35 is arranged to be closed on the upper surface 13 of the cylinder block 13 as shown in FIG. 3, and a discharge port 38 for communicating the cylinder chamber 13 ′ to the discharge chamber is formed, and on the upper surface thereof. As shown in FIG. 6, a single accommodating portion 37 for accommodating the discharge valve 34 and the backing spring 33 is formed, and a valve seat portion in which the discharge valve 34 is seated around the discharge opening 38 is formed. Is formed. In addition, a free space 41 is formed at the lower end of the single accommodating part 37 in the single accommodating part 37 to smoothly open and close the discharge valve 34, and the free space 41 is shown in FIG. 6. As described above, the discharge valve 34 may have a shape similar to the outer shape of the discharge valve 34. A fixed protrusion 44 for restricting the movement of the discharge valve 34, the backing spring 33 and the stopper member 31 is provided at a predetermined position of the free space 41.

5 and 6, the flapper discharge valve 34 of the valve plate member 35 opens and closes the discharge port 38 of the valve plate member 35 according to the internal pressure of the cylinder 13 at the other end. The insertion hole 43 is formed to be inserted into the fixing protrusion 44 of the upper single receiving portion 37 so that one end is fixed.

In addition, the backing spring 33 is inserted into the single receiving portion 37 and inserted into the fixing protrusion 44 of the upper single receiving portion 37 of the valve plate member 35 so that one end is fixed. The ball 42 is formed, it is formed of an elastic material to elastically limit the degree of opening of the other end of the discharge valve 52 in the upper portion of the discharge valve (52). In addition, an asymmetrical portion 33 ′ may be formed in the backing spring 33 as shown in FIG. 6 to ensure the prevention of misassembly, and at one end of the valve plate member 35, Asymmetric supports 32 may be formed corresponding to the asymmetrical portions 33 'to ensure prevention.

The stopper member 31 is embossed so that one end of the stopper member 31 is fixed to the valve cover 101 by the stopper member 31 without interfering with the fixed protrusion 44 at one end of the fixed protrusion 44. Part 36 is provided, and the backing spring 33 can smoothly flow to one end opposite to the embossing part 36, and the banding part 39 is fixed so that the other end is fixed by the valve cover 101. It is provided so as to fixedly limit the opening degree of the other end of the discharge valve 34 between the lower surface of the valve cover 101 and the backing spring (33). In addition, the embossed portion 36 is provided so that the height when the stopper member 31 is assembled is equal to the height of the valve plate member 35, and is opposite to the fixing protrusion 44 of the stopper member 31. The bending part 39 is installed at one end. After the stopper member 31 is assembled to the single receiving portion 37 of the valve plate member 35, the valve cover 101 presses and fixes both ends of the stopper member 31. Is formed.

In addition, the valve cover 101 is formed on the upper surface 13 of the cylinder block 13 together with the intermediate valve plate member 35 so as to form a discharge chamber sealed at the upper portion of the discharge port 38 as shown in FIG. It is configured to be fixed.

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 and 6.

The flapper discharge valve assembly described above simply arranges the valve plate member 35 at a predetermined position on the upper surface 13 of the cylinder block 13 and discharges it to the single receiving portion 37 of the valve plate member 35. After inserting and inserting the insertion holes 43 and 42 of the valve 34 and the backing spring 33 into the fixed protrusion 44, the embossed portion 36 of the stopper member 31 is fixed protrusion 44. The assembly is simply completed by placing in the single receptacle 37 to be inserted into and fixing the valve cover 101 at the top thereof. In addition, the opposite insertion is prevented by the asymmetric support part 32 and the asymmetrical shape part 33 '.

The flapper discharge valve assembly of the compressor assembled as described above has a pressure in the discharge chamber of the valve cover 101 due to the pressure of the cylinder chamber 13 'as the piston 14 moves forward in the cylinder chamber 13'. The flapper discharge valve 34 is made larger so that the discharge port 38 of the valve plate member 35 is opened by bending and rotating upward in FIG. 5 against its own elastic force about its fixed end. The compressed refrigerant gas in the cylinder chamber 13 'is discharged to the discharge chamber. In the present invention, the discharge valve 34 is firmly fixed by the fixing protrusion 44 so that the discharge valve 34 can be opened quickly without slipping.

Then, the flapper discharge valve 34 is first elastically limited by the backing spring 33 so as not to bend or deform excessively by the pressure of the refrigerant gas discharged, and by the stopper member 31. The rotation is fixedly limited.

Thereafter, at the top dead center of the piston 14 or in the reverse direction, the flapper discharge valve 34 returns to close the discharge port 38 quickly by its elastic force and the elastic force of the backing spring 33. During the retraction of the piston 14, 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 34 is naturally maintained. At this time, since the backing spring 33 is also firmly fixed by the fixing protrusion 44 and the insertion hole 42, the closing operation of the flapper discharge valve 34 is performed accurately and quickly without slipping or flowing. You lose.

By assembling and operating as described above, the insertion protrusions 42 of the fixed protrusion 44 and the discharge valve 34 and the backing spring 33 formed on the valve plate member 35 without slipping or slipping are also assembled. And 43, the discharge valve 34 and the backing spring 33 can be easily assembled and firmly fixed, and the discharge valve 34 can be opened and closed quickly with the improvement of assemblability.

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 embossed portion 36 and the bending portion 39 are formed in the stopper member 31 and the valve plate member By forming the fixing protrusions 44 on the 35, the assemblability can be improved, and the discharge valve 34 and the backing spring 57 flow by the fixing protrusions 44 and the insertion holes 42. Since the opening and closing operation is not performed, the valve loss due to the opening and closing delay is reduced, and the volume of the discharge port 38 can be minimized, thereby maximizing the efficiency of the compressor.

Claims (10)

A valve plate member 35 having a discharge port 38 formed therein, a discharge valve 34 which opens and closes to discharge high pressure gas, a backing spring 33 which defines an opening / closing area of the discharge valve, the discharge valve 34 and the backing spring In the compressor having a valve cover (101) for fixing a stopper member (31) for fixing (33), A single accommodating part 37 is formed on the upper surface of the valve plate member 35 to accommodate the discharge valve and the backing spring, and the discharge valve 34 is smoothly opened and closed under the single accommodating part 37. A free space 41 is formed in the single receiving portion and restricts the movement of the discharge valve 34, the backing spring 33 and the stopper member 31 at a predetermined position of the single receiving portion 37. The fixed protrusion 44 is provided, and the stopper member 31 has an embossed portion 36 installed at one end of the fixed protrusion 44 so as not to interfere with the fixed protrusion 44. One end of the opposite side of the embossing portion 36 has a bending portion 39 so that the backing spring 33 can flow smoothly, and both ends of the stopper member 31 are fixed to the valve cover 101 to the In order to maximize the efficiency of the compressor by minimizing the volume of the discharge port 38 The compressor according to claim. The compressor as claimed in claim 1, wherein the single receiving portion (37) is configured to simultaneously receive the discharge valve (34), the backing spring (33) and the stopper member (31). 3. The compressor as set forth in claim 2, characterized in that it has said fixed protrusion (44) such that the discharge valve (34) and said backing spring (33) cannot flow. The embossing portion 36 according to claim 1, wherein one end of the stopper member 31 does not interfere with the fixing protrusion 44 and the height when assembled is equal to the height of the valve plate member 35. Compressor is installed and one end of the stopper member (31) opposite the fixing protrusions (44), the bending section (39) is bent so that the backing spring (33) can flow smoothly. The method of claim 4, wherein both ends of the stopper member 31 are manufactured to be the same height as the height of the upper side of the valve plate member 35 after assembling to the single receiving portion 37 of the valve plate member 35. Compressor characterized in that. 6. The stopper member (31) according to claim 5, wherein the stopper member (31) is assembled to the single receiving portion (37) of the valve plate member (35), and then fixed by pressing both ends of the stopper member (31) by the valve cover (101). Compressor characterized in that formed in the structure. The compressor as set forth in claim 1, wherein said backing spring has an asymmetrical portion (33 ') for preventing misassembly in said single receptacle (37). 8. Compressor according to claim 7, characterized in that one end of the valve plate member (35) has an asymmetric support (32) for preventing misassembly and flow. The asymmetric support portion 32 is formed at one end of the single accommodating portion 37 so that each of the asymmetrical portions 33 'of the discharge valve 34 and the backing spring 33 is formed. Compressor, characterized in that the operation is operated so that the misassembly and the discharge valve 34 and the backing spring 33 is not flowed. 10. The compressor as set forth in claim 9, wherein the free space (41) is installed so as to resemble an outer shape of the discharge valve (34).