JPH06346854A - Cylinder head for sealed type reciprocation type compressor - Google Patents

Abstract

PURPOSE: To completely prevent the high temperature of discharge refrigerant gas from being transmitted to a suction refrigerant gas by arranging a suction means and a discharge means of refrigerant gas at prescribed intervals apart from each other on the upper face both sides of a base formed on a cylinder head plate for a compressor housing. CONSTITUTION: A base 15 is formed on a cylinder head plate inside a compressor housing in the upper part of a piston 7 in the cylinder 6. A silencer served as a suction cover 30 and a discharge cover 31 as a discharge means are arranged on the upper face both sides of the base 15 at prescribed intervals C apart from each other. A heat insulating material 32 is arranged in the inside bottom of the suction cover 30. An inside suction pipe 33 is penetrated through a prescribed part of the base 15 so as to suck the refrigerant gas inside the suction cover 30. This constitution can completely prevent the high temperature of the discharge refrigerant inside the discharge cover 31 from being directly or indirectly via the base transmitted to the suction refrigerant gas inside the suction cover 30.

Description

Description: TECHNICAL FIELD The present invention relates to a hermetic reciprocating compressor, and more specifically, it keeps a suction refrigerant gas supply line at a shortest distance to suck suction refrigerant gas. A cylinder head of a hermetic reciprocating compressor, which prevents a pressure drop phenomenon in a process and prevents a high temperature of a discharge refrigerant gas from being transferred to a suction refrigerant gas, thereby improving efficiency of the compressor. It is a thing. [Prior Art] Generally, in a hermetic reciprocating compressor, as shown in [Fig. 9] and [Fig. 10], a frame is formed in the central portion of the inner side of the hermetic container composed of the upper and lower housings 1 and 2. 3 is fixed, and a compressor section 4 is provided above the frame 3.
Was installed, and the electric motor part 5 was installed on the lower side of the frame 3. In addition, in the compressor unit 4, a piston 7 is reciprocally inserted into a cylinder 6 fixed to the upper surface of the frame 3, and a valve plate cover 8 is provided on the rear side of the cylinder 6 with a plurality of fixing screws 9. It was fixed in. Further, between the valve plate cover 8 and the cylinder 6, a suction valve 10 for guiding the suction of a refrigerant gas, a valve plate 11, and a discharge valve for guiding a high pressure refrigerant gas at the time of discharging to prevent a backflow. 12, an intermediate plate 13 having a suction hole 13a and a discharge hole 13b on both sides thereof, and a packing cover 14 for preventing leakage of the refrigerant gas and maintaining an appropriate fastening force are interposed. A substrate 15 is installed inside the valve plate cover 8, and the suction guide 1 is provided above the substrate 15.
6 was fixed, and the suction gas was guided to the inner side of the cylinder 6 through the suction hole 13a formed in the substrate 15. Moreover, the head cover 17 is fixed to the outer side of the valve plate cover 8. Further, a discharge hole 13b and a suction port are formed on both sides of the substrate 15, and a suction silencer 18 having a suction pipe 18 'communicating with the inner side of the closed container is mounted on the suction port side substrate. A discharge silencer 19 having a discharge pipe 19 'communicating with the outer side of the closed container was mounted on the side of the discharge hole 13b of the substrate 15. The electric motor section 5 is composed of a crankshaft 20 for sliding the piston 7 back and forth, a stator 21 and a rotor 22. In the figure, an unexplained reference numeral 23 is a suction pipe installed on the outer side of the housing 1, 24 is an elastic supporting device, and 25 is a refrigerating machine oil storage chamber. The operation of the general hermetic reciprocating compressor configured as described above was as follows. First, when power is supplied, the crankshaft 20 is eccentrically rotated by the drive of the electric motor unit 5, and the piston 7 is moved to the inner space 6a of the cylinder 6.
Compress the refrigerant gas while sliding back and forth. Next, when the piston 7 is retracted from the top dead center to the bottom dead center of the cylinder 6, the space 6a becomes empty and the pressure difference between the space 6a and the outside sucks 70 ° C. through the external suction pipe 23.
Refrigerant gas of a certain degree (the temperature is 35 ° C. before flowing into the closed container, but is raised to about 70 ° C. while passing through the inside) passed through the suction pipe 18 ′ and passed through the suction silencer 18. After that, the gas flows into the space 6 a of the cylinder 6 through the suction guide 16 of the valve plate cover 8 and the suction valve 10. After that, when the piston 7 again enters the top dead center from the bottom dead center, the refrigerant gas located in the space 6a of the cylinder 6 is compressed and the suction valve 10 is pressed.
The suction hole 13a is closed by pressing, and the pressure of the continuously compressed refrigerant gas is higher than that of the external refrigerant gas.
Flows into the inner space S of the exhaust gas, passes through the discharge silencer 19, and is discharged to the outside at a high temperature of approximately 110 ° C. to 120 ° C. In this case, since the discharge hole 13b is closed at the moment when the suction hole 13a is opened, the reverse flow of the high pressure refrigerant gas is prevented, and the space S on the inner side of the valve plate cover 8 has a pressure pulsation phenomenon of the high pressure refrigerant gas. It is supposed to play a role of decreasing. [Problems to be Solved by the Invention] However, in the general hermetic reciprocating compressor configured as described above, the suction refrigerant gas is sucked after passing through the external suction pipe 23 to the inner side of the hermetic container. Since it has a complicated path of flowing into the silencer 18, there is an inconvenience that the pressure of the suction refrigerant gas is lowered while passing through the inflow path. Further, in the space S of the valve plate cover 8, the suction guide 16 for guiding the suction refrigerant gas at 70 ° C. is fixed to the suction hole side of the substrate 15, and the suction guide 1
6 Since the structure has a space S in which the high temperature refrigerant gas of 110 ° C. to 120 ° C. is stored on the outer side, the temperature of the high temperature refrigerant gas is transmitted to the low temperature refrigerant gas inside the suction guide 16. Increase the temperature of the suctioned refrigerant gas, and
There is an inconvenience that the density of the refrigerant gas decreases and the efficiency of the compressor decreases. In order to solve such a problem, the inventors of the present invention have conducted extensive research, and as a result, intend to provide the following cylinder head of a hermetic reciprocating compressor. [Means for Solving the Problems] An object of the present invention is to form a suction cover and a discharge cover on the upper surface of a substrate of a cylinder head at predetermined intervals so that the high temperature of the discharge refrigerant gas is conducted to the suction refrigerant gas. In addition, it is an object of the present invention to provide a cylinder head of a hermetic reciprocating compressor capable of preventing the efficiency of the compressor from being lowered due to the rise in the temperature of the sucked refrigerant gas. And the object of the present invention is
A substrate formed on the cylinder head plate on the inner side of the compressor housing, and a discharge means having a discharge cover fixed to the substrate for discharging the gas compressed by the cylinder to the outside, a discharge pipe, and a discharge silencer. This is achieved by constructing a cylinder head of a hermetic reciprocating compressor by a suction cover also serving as a silencer fixed on the substrate at a predetermined distance from the discharge means and a suction means having a suction pipe. [Embodiment] An embodiment of the present invention will be described in detail below with reference to the drawings, but the same reference numerals are used for the same parts as those of the conventional structure. As shown in FIGS. 1 and 2, in one embodiment of the cylinder head of the hermetic reciprocating compressor according to the present invention, the substrate 15 is provided on the cylinder head plate on the inner side of the compressor housing 1. A silencer / suction suction cover 30 and a discharge cover 31 of the discharge means are separately formed at predetermined intervals C as suction means on both upper surfaces of the substrate 15, and the silencer / suction suction cover 30 is formed. A heat insulating member 32 made of a Teflon plate is attached to the upper surface of the substrate 15 on the inner side of the substrate 15.
Conduction is prevented through the suction cover 30 side. Here, the intake cover 30 and the discharge cover 31 also serving as the silencer are made of a plastic material, and
Have been narrowed down. In addition, the silencer / suction suction cover 30 is formed with a predetermined inner volume so that the suction cover 30 can function as an existing suction silencer, and the discharge cover 31 has a higher inner height h. It is formed so as to have a volume substantially similar to the volume of the existing internal space of the valve plate cover. This is because the volume of the suction cover 30 has a close relationship with the noise, and the volume of the discharge cover 31 has a close relationship with the volumetric efficiency of the refrigerant gas.
Also, an internal suction pipe 33 is provided at a predetermined portion of the substrate 15 so as to project from the housing 1, and the external suction pipe 2 protrudes from the housing 1.
After passing through the inside of the closed container, the refrigerant gas flowing in through 3 is sucked into the suction cover 30 through the internal suction pipe 33. In the operation of the hermetic reciprocating compressor according to the embodiment of the present invention configured as described above, the crankshaft 20 is eccentrically rotated by the drive of the electric motor unit 5 and the piston 7 is moved to the cylinder as in the conventional case. Refrigerant gas is compressed while reciprocatingly sliding in the internal space 6a of 6. Next, when the piston 7 retracts from the bottom dead center, the suction refrigerant gas of about 70 ° C sucked through the external suction pipe 23 is sucked through the internal suction pipe 33.
Through the suction valve 30 that also serves as a silencer, and then through the suction valve 10 into the space 6a of the cylinder 6. In this case, the intake cover 30 that also serves as a silencer
Since its volume is formed in the same manner as the existing intake silencer, the noise can be reduced and the function of the existing intake guide for guiding the intake refrigerant gas to the space 6a of the cylinder 6 can be performed at the same time. Thereafter, when the piston 7 enters the top dead center, the refrigerant gas located in the space 6a of the cylinder 6 is compressed and the suction valve 10 is pressed.
, The suction hole 13a is closed, and the continuously compressed refrigerant gas is accumulated in the space S ′ of the discharge cover 31 through the discharge valve 12 and the discharge hole 13b.
And is discharged to the outside at a high temperature of approximately 110 ° C to 120 ° C. In this case, since the discharge cover 31 is formed separately from the silencer / intake cover 30 with a predetermined space C therebetween, there is no fear that the high temperature of the discharge refrigerant gas is transmitted to the suction refrigerant gas, and the suction cover 30 is provided. Since the heat insulating member 32 is adhered to the inner side of the base plate 15, the high temperature of the gas inside the discharge cover 31 is completely blocked from passing through the base plate 15 to the suction cover 30 side. Like Moreover, since the discharge hole 13b is closed at the moment when the suction hole 13a is opened, the backflow of the high pressure refrigerant gas is prevented, and the pressure pulsation phenomenon is reduced by the space S ′ of the discharge cover 31. Another embodiment of the hermetic reciprocating compressor cylinder head according to the present invention will be described below. As shown in [FIG. 3] and [FIG. 4], a silencer-combined suction cover 30 having a suction portion 30 ′ as a suction means and a discharge cover 31 of the discharge means are provided on both upper surfaces of the substrate 15 respectively. The suction pipe 33 is separated and fixed at a predetermined distance C, a suction pipe 33 is provided at a predetermined portion of the upper housing 1, and the inner end of the suction pipe 33 is engaged with the suction portion 30 ′ by a buffer spring 34. The buffer spring 34 is for absorbing the vibration generated when the compressor operates, and instead of the coil spring, another elastic body such as a bellows may be used. In other respects, the operation is the same as that of the above-mentioned one embodiment, and the operation is almost the same as that of the above-mentioned one embodiment. Further, another embodiment of the hermetic reciprocating compressor cylinder head according to the present invention will be described as follows. As shown in FIGS. 5 and 6, the direct suction method and the indirect suction method can simultaneously solve the noise generation due to the direct suction of the refrigerant gas and the pressure drop of the suction gas due to the indirect suction of the refrigerant gas. And a suction pipe 41 projecting inward from the side surface of the upper housing 1 so as to project inward at a predetermined distance C1, and the suction cover 5 also serving as the silencer is provided on one side of the upper surface of the substrate 15.
0 is curvedly formed at a predetermined distance C2 from the discharge cover 42 formed on the upper surface of the substrate 15. The silencer / inhalation cover 50 is formed to have a horizontal portion 51 and a vertical portion 52 which is formed continuously with the horizontal portion 51 and is curved downwardly. The lower side of the horizontal portion 51 is fixed on the substrate 15. The horizontal portion 51 is communicated with the internal space portion 6a of the cylinder 6 through the suction hole 13a, and a suction port 53 that faces the suction pipe 41 close to the suction pipe 41 is provided at a predetermined position below the vertical portion 52. The suction pipe 41 is projected from the inner side end thereof with a predetermined distance C4, and the vertical portion 52 is curved downward with a predetermined distance C3 from the outer wall of the cylinder 6. Therefore, the inner side of the horizontal portion 51 is formed in the resonance chamber 52a, and the inner side of the vertical portion 52 is formed in the suction chamber 52b. Reference numeral 45 in the figure
Shows a clamp for fixing the suction cover 50 to the substrate 15. The operation of another embodiment of the present invention constructed as above will be described below. When the piston 7 reciprocally slides due to the driving of the motor, the refrigerant gas flows into the inside of the suction cover 50 through the suction pipe 41, passes through the suction hole 13a, and the space portion 6a of the cylinder 6 passes through.
Is flowed into. In this case, since the predetermined distance C4 is separated between the inner end of the suction pipe 41 and the front end of the suction port 53 of the suction cover 50, part of the refrigerant gas flowing through the suction pipe 41 ( (About 5%) flows into the inside of the closed container through the space C4, and cools the high-temperature (65 to 75 ° C.) refrigerant gas in the closed container, the cylinder 6 and the discharge chamber 42. Then, most of the remaining suction gas (about 95%) flows into the suction cover 50 through the suction port 53 of the suction cover 50, and the resonance chamber 5 of the horizontal portion 51 is closed.
Noise is reduced at 2a and is sucked into the internal space 6a of the cylinder 6 through the suction hole 13a. Then, it is compressed by the action of the piston 7 and discharged to the outside through the discharge hole 13b, the discharge cover 42, and the discharge silencer 19. Therefore, the advantage of the direct suction type and the indirect suction type is obtained by the distance C4 between the suction pipe 41 and the suction port of the suction cover 50, and the wall of the cylinder 6 and the discharge cover 42 and the supply cover 5 are obtained.
The distance C3 / C2 from 0 suppresses the high temperature on the side of the cylinder 6 and the discharge cover 42 from being conducted to the suction cover 50, and prevents the density of the suction gas from decreasing. In addition, the resonance chamber 52a minimizes noise generated when the refrigerant gas is sucked. The performance test results of the hermetic reciprocating compressor according to the present invention are shown in graphs of [FIG. 7] and [FIG. 8]. The graph shown in FIG. 7 shows the temperature at the outlet side of the suction cover of the standard model (24CC grade) which is currently generally used and the models (S # 1, S #) according to the present invention.
2, D # 1, D # 2) and the inlet cover outlet side temperature of the standard model, and the inlet cover outlet side temperature of the standard model gas is about 98 ° C. It can be seen that the suction cover outlet side mixing degree of the suction gas is sucked inwardly of the cylinder 6 at a low temperature of about 64-70 ° C.
FIG. 8 shows a comparison between the model GS according to the present invention and the Matsushita model (MS) (75 CC grade) currently in use when the intake cover of the present invention is used, and the intake gas temperature at the outlet side of the intake cover is measured and compared. It is a graph and GS-s
It can be seen that the inhaled gas whose type is lower than that of the MS-D type by about 10 ° C. is inhaled into the cylinder. [Advantages of the Invention] As described above, in the cylinder head of the hermetic reciprocating compressor according to the present invention, the temperature of the suction gas sucked inward of the cylinder is remarkably lowered. Therefore, there is an effect that the efficiency of the compressor can be remarkably improved as compared with the conventional case. For example, efficiency can be improved by about 8% for the 24CC class and about 12% for the 75CC class.

BRIEF DESCRIPTION OF THE DRAWINGS [FIG. 1] is a vertical sectional view showing an internal configuration of a hermetic reciprocating compressor according to an embodiment of the present invention. FIG. 4 is a sectional view taken along line IV-IV of the internal configuration of the reciprocating compressor shown in FIGS. 2 and 1. FIG. 3 is a vertical cross-sectional view showing the internal structure of a hermetic reciprocating compressor according to another embodiment of the present invention. FIG. 4 is a sectional view taken along line V1-V1 of FIG. 4 and FIG. FIG. 5 is a partial vertical cross-sectional view showing a cylinder head portion of a hermetic reciprocating compressor according to another embodiment of the present invention. FIG. 6 is a perspective view of the suction cover portion shown in FIGS. 6 and 5. FIG. 7 is a graph showing the temperatures of the suction cover outlets of the compressor according to the present invention and the conventional compressor in comparison. FIG. 8 is a graph showing a comparison of the discharge gas temperatures from the suction cover outlet of the compressor according to the present invention and the Matsushita model compressor. FIG. 9 is a vertical cross-sectional view showing the internal configuration of a general hermetic reciprocating compressor. FIG. 10 is a sectional view taken along the line AA in FIGS. 10 and 9.

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[Procedure Amendment] [Submission Date] December 22, 1992 [Procedure Amendment 1] [Document Name for Amendment] Specification [Item Name for Amendment] Brief Description of Drawings [Correction Method] Change [Correction Details] [ BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a vertical sectional view showing an internal configuration of a hermetic reciprocating compressor according to an embodiment of the present invention. 2 is an IV-IV of the internal configuration of the reciprocating compressor shown in FIG.
It is a line sectional view. FIG. 3 is a vertical cross-sectional view showing the internal structure of a hermetic reciprocating compressor according to another embodiment of the present invention. 4 is a sectional view taken along line VI-VI of FIG. FIG. 5 is a partial vertical cross-sectional view showing a cylinder head portion of a hermetic reciprocating compressor according to another embodiment of the present invention. FIG. 6 is a perspective view of the suction cover portion shown in FIG. FIG. 7 is a graph showing the temperatures of the suction cover outlet of the compressor according to the present invention and the conventional compressor in comparison. FIG. 8 is a graph showing a comparison of discharge gas temperatures from the suction cover outlet of the compressor according to the present invention and the Matsushita model compressor. FIG. 9 is a vertical cross-sectional view showing the internal structure of a general hermetic reciprocating compressor. 10 is a cross-sectional view taken along the line AA of FIG.

Claims (1)

[Claims] (1). A substrate formed on a cylinder head plate of a compressor housing, a discharge means fixed to the substrate for discharging gas compressed by the cylinder to the outside, and a discharge means fixed to the substrate at a predetermined interval. A cylinder head of a hermetically sealed reciprocating compressor, comprising a suction means. (2). The cylinder head of a hermetic reciprocating compressor according to claim 1, wherein a heat insulating member is attached to the upper surface of the substrate on the inner side of the suction means. (3). The cylinder of a hermetic reciprocating compressor according to claim 1, wherein the suction means comprises a suction cover for reducing noise during gas suction and a suction pipe communicating with the suction cover. head. (4). The hermetic reciprocating compressor according to claim 3, wherein the suction cover of the suction means is formed on the substrate at a predetermined distance from the discharge means to prevent heat conduction from the cylinder head and the discharge means. Cylinder head. (5). The cylinder head of a hermetic reciprocating compressor according to claim 3, wherein the suction pipe is provided so as to project from an inner side of the compressor housing. (6). The cylinder head of a hermetic reciprocating compressor according to claim 3, wherein the suction pipe is provided so as to project from the outer side of the housing of the compressor and communicates with the suction cover. (7). The cylinder head of a hermetic reciprocating compressor according to claim 6, wherein a cushioning elastic member is engaged between the suction pipe and the suction cover. (8). The suction means includes a horizontal portion formed to communicate with the cylinder through a suction hole, a vertical portion continuously curved downward from the horizontal portion, a lower end of the vertical portion, and a housing. The cylinder head for a hermetic reciprocating compressor according to claim 1, further comprising a suction member projecting from the above. (9). The suction member is provided on an outer side of the compressor housing so as to inject gas to an inner side of the housing, and a suction pipe is provided at a lower end of the vertical portion on an inner side of the housing corresponding to the suction pipe. The cylinder head of a hermetic reciprocating compressor according to claim 8, further comprising: a suction port for guiding the suction gas toward the inner side of the suction cover. (10). The diameter of the suction pipe projecting to the outside of the housing is formed to be slightly larger than the diameter of the suction port projecting to the lower end of the vertical portion on the inside of the housing. Cylinder head for hermetic reciprocating compressor. (11). 10. The hermetic reciprocating compression according to claim 9, wherein the suction members projecting inward and outward of the housing are respectively projecting so as to face each other at a predetermined distance on the inner side of the housing. Machine cylinder head. (12). 9. The hermetic reciprocating compressor according to claim 8, wherein the horizontal portion of the suction means is formed at a predetermined distance from the discharge means to prevent heat conduction from the discharge means and the cylinder. Cylinder head. (13). The vertical portion of the suction means is formed to be curved downward at a predetermined distance from a side surface of the cylinder in order to suppress heat conduction from the cylinder.
Cylinder head of the hermetic reciprocating compressor described.