KR20030018545A - A high efficiency valve assembly for compressor - Google Patents

Abstract

PURPOSE: A high efficiency valve assembly of a compressor is provided to reduce discharge load of the compressor. CONSTITUTION: A valve plate(110) includes a refrigerant connecting path(160) fluidically connecting a first diffuser(113) and a second diffuser(114) to attenuate noise and to increase opening degree of a discharge valve(130). A valve assembly discharges more amount of refrigerant as much as volume of a space of the refrigerant connecting path to reduce pressure of refrigerant and discharge load of a compressor. Refrigerant gas is discharged simultaneously through the first diffuser, the second diffuser and the refrigerant connecting path to push the discharge valve so as to attenuate noise.

Description

A high efficiency valve assembly for compressor

The present invention relates to a high efficiency valve assembly of a compressor, and more particularly to a high efficiency valve assembly of the compressor that can obtain a pressure reduction effect and a noise reduction effect.

In general, a compressor converts mechanical energy into compressed energy of a compressible fluid, and serves to increase the pressure of the refrigerant gas to the condensation pressure by sucking the refrigerant gas in a low pressure evaporator to compress the refrigerant in a refrigerating device such as a refrigerator. . Such compressors include reciprocating compressors, rotary compressors, turbo compressors, and the like.

Referring to Figure 1, a typical hermetic reciprocating compressor of the compressor is illustrated. A hermetic reciprocating compressor generally includes a motor part 20 including a stator 21 and a rotor 22 in a main body case 10 and a crank shaft 23 press-fitted in the center of the rotor 22. It consists of a compressor unit 30 which sucks and compresses the refrigerant according to the rotation and then discharges the refrigerant. The compressor unit 30 includes a cylinder 31 in which a refrigerant is accommodated, and a piston 32 reciprocating inside the cylinder 31 to compress the refrigerant, and seals the cylinder 31 on the front surface of the cylinder 31. The cylinder head 33 is provided. The valve assembly 40 is disposed between the cylinder head 33 and the cylinder 31 so that refrigerant may be supplied into or discharged from the cylinder 31.

As shown in FIG. 2, the valve assembly 40 includes a valve plate 42 having first and second refrigerant discharge holes 41 and 41 ′, and a valve plate 42 and a cylinder head 33. A discharge valve 43 installed in the opening and closing portion of the first and second refrigerant discharge holes 41 and 41 ', and a backing spring installed above the discharge valve 43 to restrict the opening of the discharge valve 43. 44 and a stopper 45 provided above the backing spring 44 to restrict the discharge valve 43 and the backing spring 44 to be held in place.

As shown in FIG. 3, the first and second diffusers 46 and 46 'are respectively disposed on the refrigerant discharge holes 41 and 41' to reduce the discharge load by increasing the flow rate of the discharged refrigerant. First and second circular protrusions 47 and 47 'are formed to provide an appropriate adhesion to the valve 43. The backing spring 44 is formed in a shape in which the open end 44b is bent upward from the fixed end 44a joined to the upper surface of the discharge valve 43 so that the discharge valve 43 has a lift amount of a predetermined height. The fixed ends of the discharge valve 43, the backing spring 44 and the stopper 45 are fastened to the valve plate 42 by a fastening member such as a rivet 48 '.

Looking at the operation of the hermetic reciprocating compressor configured as described above, when the piston 32 moves backwards, the low-temperature, low-pressure refrigerant gas is connected to the external refrigerator through the suction pipe and the suction muffler fixed to the upper or lower casing. The high temperature, high pressure refrigerant gas compressed by the piston 32 in the cylinder 31 when the piston 32 moves forward from the evaporator of the same refrigeration apparatus to the suction valve of the valve assembly 40 is moved. From the discharge valve 43 of the valve assembly 40 is discharged to the external evaporator through the discharge pipe and the discharge pipe connecting pipe fixedly sealed to the upper to lower casing.

However, the valve assembly 40 of the conventional hermetic compressor configured as described above, in order to reduce the discharge load and thereby reduce the refrigerant input and the input current, the respective refrigerant discharge holes 41, 41 ') diffuser 46, 46' is formed on the upper part, but due to structural constraints of the refrigerant discharge holes 41, 41 ', the diffuser is formed only in the minute area around the upper portion of the refrigerant discharge holes 41, 41'. The discharge load reduction effect was slightly improved than the structure without forming (46, 46 '), but it was not seen to be remarkably improved. In particular, the conventional valve assembly 40 still generates a lot of noise because the refrigerant flow discharged through the two refrigerant discharge holes 41 and 41 'collides with the discharge valve 43, respectively.

As another method for reducing the discharge load by increasing the discharge flow rate, a method of increasing the diameter of the refrigerant discharge holes 41 and 41 'may be considered. There is a problem that cannot extend beyond the aperture range.

As such, the problem of reducing the noise of the discharge valve and increasing the discharge flow rate has emerged as an important problem to be urgently solved in order to reduce the refrigerant input and current and to increase the efficiency and performance of the compressor.

The present invention has been made to solve the above problems, an object of the present invention between the diffuser formed in each of the top of the refrigerant discharge hole to expand the volume space of the diffuser (diffuser) in the valve plate having two or more refrigerant discharge holes It is to provide a high efficiency valve assembly of the compressor that can form a refrigerant connection passage to form an elliptical diffuser to improve the discharge load drop and discharge path, thereby obtaining a pressure reduction effect and noise reduction effect.

1 is a cross-sectional view of a typical reciprocating compressor.

2 is a cross-sectional view of a valve assembly of a conventional compressor.

3 is a perspective view of a valve plate of a conventional valve assembly.

4 is an exploded perspective view of the valve assembly of the compressor according to the present invention;

5 is a cross-sectional view of the valve assembly of FIG. 4.

6 is a perspective view of the valve plate of the valve assembly of FIG. 4.

* Explanation of symbols for the main parts of the drawings *

10: main body case 20: electric motor unit

30: compressor unit 31: cylinder

33: cylinder head 40, 100: valve assembly

41, 41 ', 112, 112': refrigerant discharge holes 42, 110: valve plate

43, 130: discharge valve 44, 140: backing spring

45, 150: stopper 46, 46 ', 113, 114: diffuser

47, 47 ': Round protrusions 48, 48', 180, 180 ': Rivet

50: suction muffler 111: refrigerant suction hole

116: peripheral depression 120: suction valve plate

121: suction valve 160: refrigerant connection passage

170: elliptical protrusion

An object of the present invention as described above, the valve plate and the cylinder head including a diffuser having at least two refrigerant discharge holes are formed and having a diameter larger than the diameter of the refrigerant discharge hole in the upper portion of each refrigerant discharge hole; In the valve assembly including a discharge valve installed between the opening and closing the refrigerant discharge hole, the valve plate comprises a refrigerant connection passage for communicating between the respective diffusers to reduce noise and increase the discharge flow rate It provides a highly efficient valve assembly of the compressor.

In a preferred embodiment, the diffuser and the refrigerant connecting passage is configured to have one elliptical depression shape. In addition, an elliptical planar protrusion is formed around the diffuser and the refrigerant connecting passage to provide an appropriate adhesion to the discharge valve.

Hereinafter, a high efficiency valve assembly of a compressor according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. However, the same reference numerals are assigned to the same parts as the prior art, and detailed description thereof will be omitted.

Referring to FIG. 4, the high efficiency valve assembly 100 according to the present invention includes a valve plate 110 having a refrigerant suction hole 111 and first and second refrigerant discharge holes 112 and 112 ′, and a valve plate ( A suction valve plate 120 formed between the cylinder 110 and the cylinder 31 (see FIG. 1) and having a suction valve 121 for opening and closing the refrigerant suction hole 111, the valve plate 110, and the cylinder head 33. A discharge valve 130 disposed between the discharge valves 130 and 112 to open and close the refrigerant discharge holes 112 and 112 ', and a backing spring 140 installed above the discharge valve 130 to restrain the opening of the discharge valve 130; The stopper 150 is installed on the backing spring 140 and restricts the discharge valve 130 and the backing spring 140 to be held in place.

As shown in FIGS. 5 and 6, the valve plate 110 is formed on the first and second refrigerant discharge holes 112 and 112 ′ to increase the flow rate of the refrigerant discharged to reduce the discharge load. And communication between the second diffusers 113 and 114 and the first and second diffusers 113 and 114 to expand the volume of the first and second diffusers 113 and 114 to increase the flow rate of the discharged refrigerant. It includes a refrigerant connecting passage 160 formed to. The first and second diffusers 113 and 114 and the refrigerant connecting passage 160 have an elliptical shape above the first and second refrigerant discharge holes 112 and 112 'so as to function as one integrated diffuser. It is preferable to comprise so that it may have. Providing proper adhesion to the discharge valve 130 at the upper portion between the first and second diffusers 113 and 114 and the refrigerant connecting passage 160 and the rectangular peripheral recess 116 forming one integrated elliptical shape. An oval protrusion 170 having an oval planar contact surface is formed.

Referring to FIG. 5, the discharge valve 130 is fixed to the upper end of the first and second refrigerant discharge holes 112 and 112 ′, that is, the free end positioned on the elliptical protrusion 170, and the valve plate 110. It consists of stages. Similarly, the backing spring 140 also has a free end positioned above the free end of the discharge valve 130 and a fixed end fixed to the valve plate 110 together with the fixed end of the discharge valve 130. The stopper 150 has a first fixed end fixed to the valve plate and a second fixed end positioned above the fixed end of the backing spring 140. The fixed end of the discharge valve 130 and the backing spring 140 and the second fixed end of the stopper 150 are fixed to the valve plate 110 by a fastening member such as a rivet 180 ', 1 fixed end is fixed to the valve plate 110 by a rivet 180.

Looking at the operation of the highly efficient valve assembly 100 of the compressor configured as described above, the low-temperature, low-pressure refrigerant gas introduced from the outside of the compressor is the intake valve 121 by the pressure difference inside and outside the valve when the piston 32 moves backwards. ) Is introduced into the cylinder head 33 through the suction muffler 50. Then, when the piston 32 moves forward, the high-temperature, high-pressure refrigerant gas compressed by the piston 32 in the cylinder 31 passes through the refrigerant discharge holes 112 and 112 'of the valve plate 110. While pushing the discharge valve 130 by the pressure of the, it is sent to the external evaporator through the discharge pipe or the like.

At this time, the valve assembly 100 of the present invention can discharge a larger amount of refrigerant as much as the volume of the refrigerant connection passage 160 than the conventional valve assembly having only the first and second diffusers, the refrigerant gas discharge valve 130 The ejection load for pushing out) is much smaller than before. Therefore, the refrigerant pressure and the discharge load of the entire compressor can be reduced by that much. In addition, compared to the conventional valve assembly in which the refrigerant gas impinges on the discharge valve through the first and second refrigerant discharge holes to push out the discharge valve, respectively, the valve assembly 100 of the present invention is the refrigerant gas is the first and first The noise attenuation effect is also greatly increased by pushing and pushing through the two diffusers 113 and 114 and the refrigerant connecting passage 160 at one time.

According to the results of the experiment, it can be seen that the valve assembly 110 of the present invention has obtained a much better effect than the conventional valve assembly 40 as shown in Table 1 below.

Cold power (kcal / Hr) Input (Wattr) Efficiency (Kcal / WHr) EER (BTU / Whr) Current (Amp.) Low frequency (db) High frequency (db) Prior art 1101.62 521.86 2.111 8.376 2.53 35.5 48.8 The present invention 1089.01 513.15 2.122 8.421 2.49 39.9 46.7

As described above, the high-efficiency valve assembly of the compressor according to the present invention forms a refrigerant connection passage between the diffusers formed on the refrigerant discharge hole of the valve plate to form one elliptical diffuser, thereby reducing the discharge load and the discharge path.

In addition, input reduction and noise reduction can be obtained accordingly.

In the above, specific preferred embodiments of the present invention have been illustrated and described. However, the present invention is not limited to the above-described embodiment, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention as claimed in the claims. .

Claims (3)

A valve plate including a diffuser having at least two refrigerant discharge holes formed therein and having a diameter larger than the diameter of the refrigerant discharge holes above each refrigerant discharge hole, and installed between the valve plate and the cylinder head to provide a refrigerant discharge hole. In the valve assembly comprising a discharge valve for opening and closing, The valve plate comprises a refrigerant connection passage for communicating between each of the diffusers to reduce the noise and increase the flow rate of the discharged refrigerant. The high efficiency valve assembly of claim 1, wherein the diffuser and the refrigerant connecting passage are configured to have an elliptical recessed shape. 3. The high efficiency valve assembly of claim 2, wherein an elliptical planar protrusion is formed around the diffuser and the refrigerant connecting passage to provide an appropriate adhesion to the discharge valve.