KR100537922B1 - Muffler of swash plate compressor - Google Patents

Abstract

The present invention relates to a muffler of a swash plate compressor, and reduces the pulsation pressure in multiple stages by reducing the pressure difference in the process of discharging the compressed refrigerant from the swash plate compressor in multiple stages, as well as effectively reducing noise and discharging the refrigerant. The purpose is to improve the performance of the compressor by reducing the pressure loss.

The muffler of the present invention comprises a frame (91) formed on the outer circumferential surface of the rear housing (2), a partition rib (92) for partitioning the inner center of the frame, and partitioned by the partition rib to provide a rear housing. A suction chamber 93 having a suction port 94 in communication with the suction passage 25 and a discharge chamber 95 having a discharge port 96 which is defined by the compartment ribs and communicates with the discharge passage 24 in the rear housing. In the muffler (9) of the swash plate-type compressor comprising a (m), a mac to communicate the discharge chamber 95 and the discharge port 96 to a part of the bottom surface of the discharge chamber 95 including the discharge port 96 Dynamic pressure buffer space 97 is formed by the recessed. The buffer grooves 98 or the buffer protrusions 99 may be further formed in the pulsation pressure buffer space 97, and the buffer groove 98 or the buffer protrusion 99 may also be formed on the bottom surface of the discharge chamber 95. Can be further formed. Therefore, the pressure drop of the refrigerant discharged into the discharge chamber 95 through the discharge port 96 by the pulsation pressure buffer space 97 may be gradually reduced in steps, thereby effectively reducing the pulsation pressure during refrigerant discharge.

Description

Muffler of swash plate compressor

The present invention relates to a muffler of a swash plate compressor configured to reduce noise according to the pulsation pressure generated when the refrigerant compressed by the swash plate compressor constituting the cooling device of the vehicle is discharged through the compressor. The present invention relates to a muffler of a swash plate type compressor configured to effectively reduce refrigerant discharge noise of a compressor by reducing the pressure of the compressor.

Compressor constituting the cooling device of the vehicle is a device that selectively receives the power of the engine transmitted through the pulley by the intermittent action of the electronic clutch to compress the refrigerant supplied from the evaporator to send to the condenser.

Among these compressors, the swash plate type compressor selectively receives power of the engine through the hub and the disc assembly due to the intermittent action of the electromagnetic clutch, and the disk-shaped swash plate adhered to the drive shaft receives the power of the engine as the drive shaft rotates. And a plurality of pistons coupled together via the shoe along the periphery of the swash plate by the rotation of the swash plate to linearly reciprocate the inside of the plurality of cylinders formed in the cylinder to inhale, compress and discharge the refrigerant gas.

Next, the structure of the conventional swash plate type compressor will be described with reference to FIGS. 12 and 13.

The swash plate compressor has a front housing (1) located on the pulley (3) side and a built-in front cylinder (11), and a rear housing (2) coupled with the front housing (1) and built with a rear cylinder (21).

The front and rear cylinders 11 and 21 in turn have a plurality of bores 12 and 22 therein. Both pistons 4 are coupled so as to reciprocate linearly over the corresponding bores 12, 22 of the front and rear cylinders 11, 21, and these pistons 4 are connected to the drive shaft 5 of the swash plate 6. Are joined along the outer circumference. Accordingly, the pistons 4 reciprocate in the bores 12 and 22 of the front and rear cylinders 1 and 2 by the swash plate 6 which rotates in accordance with the rotation of the drive shaft 5.

Then, between the front housing 1 and the front cylinder 11, and between the rear housing 2 and the rear cylinder 21, the front and rear valve assembly 13 having a gasket, a discharge valve, a valve plate and a suction valve, respectively, 23) is installed. In addition, the suction passages 15 and 25 and the discharge passages 14 and 24 are formed on the inner surfaces of the front and rear housings 1 and 2 in correspondence with the discharge port of the discharge valve and the suction port of the suction valve, respectively. 2) the suction passages 15 and 25 and the discharge passages 14 and 24 are connected to each other through a connection passage (not shown) formed in the front and rear cylinders 11 and 21, so that the bore 12 of the front cylinder 11 In addition, the suction and compression of the refrigerant may be performed in the bore 22 of the rear cylinder 21 as the piston 4 moves.

In the upper portion of the outer circumferential surface of the rear housing 2, the refrigerant supplied from the evaporator at the time of the suction stroke of the piston 4 passes through the suction passage 25 of the rear housing 2. And a muffler 7 is sucked into the bore 22 of the rear cylinder 21 and the refrigerant is compressed at the time of the compression stroke of the piston 4 to be discharged toward the condenser through the discharge passage 24 of the rear cylinder 21. do.

The muffler 7 has a frame 71 formed in a substantially rectangular shape on an outer circumferential surface of the rear housing 2 and a suction port communicating with the suction passage 25 of the rear housing 2 by partitioning the inner center of the frame 71. And a discharge chamber 75 having a suction chamber 73 having a 74 and a discharge port 76 communicating with the discharge passage 24 of the rear housing 2. In addition, a cover 77 is coupled to the upper portion of the muffler 7 so as to seal the muffler 7, and the cover 77 is connected to the suction chamber 73 of the muffler 7 and connected to the evaporator side ( 78) and a discharge pipe (79) communicating with the discharge chamber (75) of the muffler (7) and connected to the condenser side.

In this way, when the muffler 7 is installed, the refrigerant compressed by the piston 4 and finally discharged into the discharge passage 24 of the rear housing 2 is a large cross-sectional area through the discharge port 76 having a narrow cross-sectional area. Since the pressure is dropped by the adiabatic expansion while being discharged to the discharge chamber (75) having a noise may be reduced to some extent. This noise reduction effect can be obtained more effectively by shifting the positions of the discharge port 76 and the discharge pipe 79 opposite to each other without facing up and down as shown in the figure.

However, in the muffler 7 of the conventional compressor as described above, since the refrigerant is discharged directly from the discharge port 76 having a narrow cross-sectional area to the discharge chamber 75 having a large cross-sectional area, the refrigerant is discharged in the discharge process of the refrigerant. Due to the large pressure difference, there is a limit in reducing the pulsation pressure, and therefore, it is impossible to completely prevent the generation of large noises, and thus it is a factor that cannot run quietly. In particular, since the refrigerant is compressed in both the front and rear cylinders 11 and 21 due to the characteristics of the swash plate type compressor, when the phase difference of the refrigerant discharged from the front and rear cylinders 11 and 21 overlaps, the pulsation pressure is amplified to increase the noise. Resonance with other parts of the vehicle occurs, resulting in greater vibration and noise.

In addition, as the discharge pressure difference of the refrigerant is large, the discharge pressure loss of the refrigerant is also increased, thereby degrading the performance of the compressor.

The present invention has been made in view of the above-described conventional problems, by reducing the pressure difference in the process of the refrigerant compressed from the swash plate compressor to the discharge chamber of the muffler in multiple stages to reduce the pulsation pressure in multiple stages can effectively reduce noise In addition, it is an object of the present invention to provide a muffler of a swash plate compressor that can improve the performance of the compressor by reducing the discharge pressure loss of the refrigerant.

In order to achieve the above object, the muffler of the swash plate compressor according to the present invention, the suction having a frame formed in a substantially rectangular on the outer peripheral surface of the rear housing, and the suction port communicates with the suction passage of the rear housing by partitioning the inner center of the frame; A muffler of a swash plate type compressor comprising a seal and a discharge chamber having a discharge port communicating with a discharge passage of a rear housing, the pulsation pressure for communicating the discharge chamber and the discharge port to a portion of the bottom surface of the discharge chamber including the discharge port. Characterized in that the buffer space portion is further recessed.

Further, according to the present invention, a plurality of buffer grooves or buffer protrusions may be further formed in the pulsation pressure buffer space part or the discharge chamber in consideration of the noise reduction effect due to the pulsation pressure reduction, and both the pulsation pressure buffer space part and the discharge chamber It may further have a plurality of buffer grooves or buffer protrusions.

According to the muffler of the present invention configured as described above, when the refrigerant is compressed in the bore of the front and rear cylinders introduced into the discharge passage of the rear housing is discharged to the pulsation pressure buffer space portion first when discharged to the discharge chamber of the muffler through the discharge port 1 A secondary pressure drop occurs after a differential pressure drop occurs and then is discharged from the pulsation pressure buffer space to a larger discharge chamber. In this way, the pressure drop occurs in multiple stages, so that a sudden pressure drop is prevented, so the pulsation pressure is reduced, thereby reducing the refrigerant discharge noise and reducing the pressure loss of the refrigerant. In particular, when the buffer grooves or buffer protrusions are formed in the pulsation pressure buffer space or the discharge chamber, or the buffer grooves or buffer protrusions are formed in the discharge chamber as well as the pulsation pressure buffer space portion, the pulsation pressure reduction effect is greater.

Other features and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments based on the accompanying drawings.

In the following embodiments, the same parts as in the conventional swash plate type compressor are denoted by the same reference numerals for convenience.

<Example 1>

The muffler of the swash plate compressor according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 5.

As shown in Figs. 4 and 5, reference numeral 1 denotes a front housing 1, on the side of the front housing 1 the power of the engine transmitted to the pulley 3 by an intermittent action to the drive shaft 5 of the compressor. An electronic clutch for selectively transmitting is installed on the back, and reference numeral 2 denotes a rear housing which is coupled to the front housing 1.

The front and rear housings 1 and 2 are provided with front and rear cylinders 11 and 21, in which a plurality of bores 12 and 22 are formed, in turn, and the front and rear bores 12 and 22 corresponding to each other of the front and rear cylinders 11 and 21 are provided. Both head pistons 4 are inserted in a linear reciprocating manner over 22). Both pistons 4 are coupled to each other via a shoe along the outer circumference of the swash plate 6, which is affixed to the drive shaft 5, thereby reciprocating according to the rotation of the swash plate 6 in accordance with the rotation of the drive shaft 5.

A front valve assembly 13 having a gasket, a discharge valve, a valve plate, and a suction valve is installed between the front housing 1 and the front cylinder 11, and corresponds to the discharge port of the discharge valve and the suction port of the suction valve. Therefore, the suction passage 15 and the discharge passage 14 are sequentially installed on the inner surface of the front housing 1.

A rear valve assembly 23 having a gasket, a discharge valve, a valve plate and a suction valve is also provided between the rear housing 2 and the rear cylinder 21, and corresponds to the discharge port of the discharge valve and the suction port of the suction valve. Therefore, the suction passage 25 and the discharge passage 24 are also installed on the inner surface of the rear housing 2.

In addition, the suction passage 15 of the front housing 1 and the suction passage 25 of the rear housing 2 communicate with each other by suction connection passages (not shown) formed in the front and rear cylinders 11 and 21, The discharge passage 14 of the front housing 1 and the discharge passage 24 of the rear housing 2 communicate with each other by discharge connection passages (not shown) formed in the front and rear cylinders 11 and 21.

On the other hand, reference numeral 9 is a muffler according to the first embodiment, and is provided on the outer circumferential surface of the rear housing 2.

The muffler 9 according to the first embodiment includes a frame 91 formed in a substantially rectangular shape on the outer circumferential surface of the rear housing 2, a partition rib 92 partitioning an inner center of the frame 91, and the partition rib. A suction chamber (93) having a suction port (94) which is partitioned by (92) and communicates with the suction passage (25) of the rear housing (2), and is partitioned by the partition ribs (92) and rear housing (2). Has a discharge chamber (95) having a discharge port (96) communicating with the discharge passage (24). In addition, the inside of the muffler 9 is sealed by covering the cover 8 on the upper part of the muffler 9, and the cover 8 is connected to the suction chamber 93 of the muffler 9 and connected to the evaporator side. The discharge pipe 85 is connected to the suction chamber 83 and the discharge chamber 95 of the muffler 9 to be connected to the condenser side.

Therefore, the high temperature and high pressure refrigerant discharged through the evaporator is introduced into the suction chamber 93 of the muffler 9 through the suction pipe 83 and then the suction passage 25 of the rear housing 2 through the suction port 94. Flows into. Some of the refrigerant introduced into the suction passage 25 of the rear housing 2 is supplied to the bore 22 of the rear cylinder 21 at the suction stroke of the piston 4 through the suction valve of the rear valve assembly 23. The remaining of the refrigerant introduced into the suction passage 25 of the rear housing 2 flows into the suction passage 15 of the front housing 1 through the suction connection passage of the rear cylinder 21 and the front cylinder 11. The suction stroke of the next piston 4 can be supplied to the bore 12 of the front cylinder 11.

As such, the refrigerant sucked into the bore 22 of the rear cylinder 21 is discharged through the discharge valve of the rear valve assembly 23 while being compressed during the compression stroke of the piston 4 to discharge passage 24 of the rear housing 2. ), The refrigerant sucked into the bore 12 of the front cylinder 11 is compressed during the compression stroke of the piston 4 and is discharged through the discharge valve of the front valve assembly 13 to discharge passage of the front housing 1. 14, the discharge passage 24 of the rear housing 2 is introduced into the discharge passage 24 of the front cylinder 11 and the rear cylinder 21 in order. The compressed refrigerant introduced into the discharge passage 24 of the rear housing 2 is discharged into the discharge chamber 95 of the muffler 9 through the discharge port 96 of the rear housing 2 and then the muffler 9. It is pumped toward the condenser through the discharge pipe 85 of the cover 8.

As described above, when the refrigerant is discharged to the discharge chamber 95 having a large cross-sectional area through the discharge port 96 having a narrow cross-sectional area, the pressure of the refrigerant rapidly drops during the refrigerant discharge process, thereby causing a pressure loss. In consideration of the lowering of this, according to the muffler of the first embodiment, the pulsation pressure for communicating the discharge chamber 95 and the discharge port 96 to a part of the bottom surface of the discharge chamber 95 including the discharge port 96. The buffer space 97 is recessed. Therefore, in the process of discharging the refrigerant into the discharge chamber 95 through the discharge port 96, the refrigerant is discharged into the discharge chamber 95 through the pulsation pressure buffer space 97 and the refrigerant is discharged through the discharge port 96. The pressure drop occurs first in the process of being discharged to the pulsation pressure buffer space 97, the second pressure drop occurs in the process of the refrigerant is discharged from the pulsation pressure buffer space 97 back to the discharge chamber (95) As the discharge pressure of the refrigerant decreases little by little due to the multi-stage pressure drop, the occurrence of a sudden pressure drop can be prevented as well as the pressure loss can be reduced.

<Example 2>

6 shows a muffler of a swash plate compressor according to Embodiment 2 of the present invention. Except that the muffler 9 of the second embodiment has a plurality of buffer grooves 98 formed in the pulsation pressure buffer space 97 in order to effectively reduce the pulsation pressure, the rest of the configuration and operation are the same as those of the first embodiment described above. Since it is the same, the same code | symbol is attached | subjected about the same part as Example 1, and the detailed description here is abbreviate | omitted.

<Example 3>

7 shows a muffler of a swash plate compressor according to Embodiment 3 of the present invention. Except that the muffler 9 according to the third embodiment has a plurality of shock absorbing protrusions 99 protruding from the pulsating pressure buffer space 97 in order to effectively reduce the pulsating pressure, the rest of the configuration and operation are described above. Since all are the same as, the same parts as the above-described embodiments are denoted by the same reference numerals and detailed description thereof will be omitted.

<Example 4>

8 shows a muffler of a swash plate compressor according to Embodiment 4 of the present invention. The muffler 9 according to the fourth embodiment has the remaining configurations and functions except that the plurality of buffer protrusions 99 are formed on the bottom surface of the discharge chamber 95 in order to effectively reduce the pulsating pressure. Since all are the same, the same parts as those of the above-described embodiments are denoted by the same reference numerals and detailed description thereof will be omitted.

<Example 5>

9 shows a muffler of a swash plate compressor according to Embodiment 5 of the present invention. Except that the muffler 9 according to the fifth embodiment has a plurality of buffer grooves 98 formed on the bottom surface of the discharge chamber 95 in order to effectively reduce the pulsating pressure. Since all are the same, the same parts as those of the above-described embodiments are denoted by the same reference numerals and detailed description thereof will be omitted.

<Example 6>

10 shows a muffler of a swash plate compressor according to Embodiment 6 of the present invention. The muffler 9 according to the sixth embodiment has the remaining configurations and functions described above except that the buffer groove 88 is formed on the bottom surface of the discharge pipe 85 side of the cover 8 to effectively reduce the pulsating pressure. Since all are the same as, the same parts as the above-described embodiments are denoted by the same reference numerals and detailed description thereof will be omitted.

<Example 7>

11 shows a muffler of a swash plate compressor according to Embodiment 7 of the present invention. The muffler 9 according to the seventh embodiment has the remaining configurations and functions described above except that the buffer protrusion 89 is formed on the bottom surface of the discharge pipe 85 side of the cover 8 so as to effectively reduce the pulsating pressure. Since all are the same as, the same parts as the above-described embodiments are denoted by the same reference numerals and detailed description thereof will be omitted.

When the buffer grooves 88 and 98 and the buffer protrusions 89 and 99 are formed as in Embodiments 2 to 7, the buffer grooves 88 and 98 when the refrigerant is discharged through the discharge port 96 and The turbulence is formed by the buffer protrusions 89 and 99, thereby effectively reducing the pulsation pressure.

The shape or arrangement of the buffer grooves 88 and 98 or the buffer protrusions 89 and 99 may be appropriately formed in consideration of the effect of reducing the pulsating pressure of the refrigerant, the discharge resistance of the refrigerant, and the like.

Although not shown in the above-described embodiments, the buffer grooves 98 or the buffer protrusions 99 may be selectively formed on both the bottom surface of the discharge chamber 95 as well as the pulsation pressure buffer space 97, and the buffer groove may be selectively formed. The 98 and the buffer protrusion 99 may be mixed together and formed.

Next, the operation of the muffler 9 of the swash plate compressor according to the present invention configured as described above will be described.

When the air conditioner switch is turned on for cooling the vehicle interior, the disk is rotated by the frictional force as the disk is brought into close contact with the friction surface of the pulley 3 by the magnetic suction input of the excitation of the excitation coil of the electronic clutch. The swash plate 6 condensed to the drive shaft 5 rotates by rotating the drive shaft 5 together through the provided hub. Since the swash plate 6 is installed in an inclined state, the phase changes according to the rotation of the swash plate 6, and the pistons 4 coupled to the swash plate 6 are shifted by the bores 12 of the front and rear cylinders 11 and 21 according to the phase difference. Within 22).

Due to the retraction of the piston 4, that is, the suction force during the suction stroke, the refrigerant discharged through the evaporator flows into the suction chamber 93 of the muffler 9 through the suction pipe 83 of the cover 8, and then the suction port. A portion of the refrigerant introduced into the suction passage 25 of the rear housing 2 through 94 and a portion of the refrigerant introduced into the suction passage 25 passes through the suction valve of the rear valve assembly 23. It is fed to the bore 22. Meanwhile, the rest of the refrigerant flowing into the suction passage 25 of the rear housing 2 is the suction connection passage of the rear cylinder 21, the suction connection passage of the front cylinder 11 and the suction passage 15 of the front housing 1. ) Is sequentially supplied to the bore 12 of the front cylinder 11 through the front suction valve of the front valve assembly 13.

In this way, the refrigerant supplied to the bores 12 and 22 of the front and rear cylinders 11 and 21 is moved forward of the piston 4, that is, the refrigerant compressed in the bore 22 of the rear cylinder 21 at the compression stroke is the rear valve. It is discharged through the rear discharge valve of the assembly 23 and flows into the discharge passage 24 of the rear housing (2). Meanwhile, the refrigerant compressed in the front cylinder 11 bore is discharged through the front discharge valve of the front valve assembly 13 to discharge the passage 14 of the front housing 1, the discharge connection passage of the front cylinder 11 and It flows into the discharge passage 24 of the rear housing 2 via the discharge connection passage of the rear cylinder 21 in turn.

The compressed refrigerant compressed by the compression stroke of the piston 4 and introduced into the discharge passage of the rear housing 2 is discharge chamber 95 of the muffler 9 through the discharge port 96 of the rear housing 2. Is discharged to the condenser through the discharge pipe 85 of the muffler cover 8.

As described above, when the coolant is discharged to the discharge chamber 95 through the discharge port 96, the coolant is discharged to the discharge chamber 95 through the pulsation pressure buffer space 97 and the coolant discharges the discharge port 96. The pressure drop of the refrigerant occurs first in the process of being discharged to the pulsating pressure buffer space 97 through, and the pressure drop of the refrigerant in the process of discharge of the refrigerant from the pulsation pressure buffer space 97 back to the discharge chamber (95) Occurs secondarily. Due to the multi-stage pressure drop, the discharge pressure of the refrigerant decreases little by little, thereby preventing the occurrence of a sudden pressure drop, thereby effectively reducing the pulsation pressure and effectively reducing the pressure loss.

Meanwhile, when the refrigerant is discharged to the discharge chamber 95 through the discharge port 96 of the rear housing 2, the buffer grooves 98 or the buffer protrusions 99 are provided in the pulsation pressure buffer space 97 or the discharge chamber 95. If they are formed or if they are formed in both the discharge chamber 95 as well as the pulsation pressure buffer space 97, the pulsation pressure reduction effect can be obtained more.

In the muffler of the swash plate type compressor according to the present invention configured as described above, the pulsation pressure buffer space 97 connected to the discharge port 96 of the rear housing 2 in the discharge chamber 95 is formed to By making the pressure drop gradually step by step, the pulsation pressure at the time of refrigerant discharge can be effectively reduced, so that the noise reduction effect can be effectively achieved, and thus, the quiet running can be performed even during the operation of the air conditioner.

1 is a plan view showing a muffler according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1.

3 is a front view showing a rear housing of a swash plate compressor provided with a muffler according to the first embodiment of the present invention.

Figure 4 is a perspective view showing a swash plate compressor is installed muffler according to the first embodiment of the present invention.

5 is a cross-sectional view showing a swash plate compressor provided with a muffler according to the first embodiment of the present invention.

6 is a plan view illustrating a muffler according to a second embodiment of the present invention.

7 is a plan view illustrating a muffler according to a third embodiment of the present invention.

8 is a plan view illustrating a muffler according to a fourth embodiment of the present invention.

9 is a plan view showing a muffler according to a fifth embodiment of the present invention.

10 is a sectional view showing the principal parts of the muffler cover according to the sixth embodiment of the present invention.

11 is a sectional view showing the principal parts of another example of the muffler cover according to the seventh embodiment of the present invention.

12 is an exploded perspective view showing a swash plate compressor provided with a conventional muffler.

13 is a cross-sectional view showing a swash plate compressor provided with a conventional muffler.

<Explanation of symbols for the main parts of the drawings>

1: front housing, 2: rear housing,

8: cover, 9: muffler,

11, 21: cylinder, 12, 22: bore,

13, 23: valve assembly, 14, 24: discharge passage,

15, 25: suction passage, 83: suction pipe,

85: discharge pipe, 88, 98: buffer groove,

89, 99: buffer protrusion, 91: te,

92: compartment rib, 93: suction chamber,

94: suction port, 95: discharge chamber,

96: discharge port, 97: pulsation pressure buffer space

Claims (4)

A suction chamber having a frame formed in a substantially rectangular shape on an outer circumferential surface of the rear housing, a suction chamber having a suction port communicating with the suction passage of the rear housing by partitioning an inner center of the frame, and a discharge passage having a discharge port communicating with the discharge passage of the rear housing; In the muffler of the swash plate type compressor which is made of a cover and covered with a cover having a suction pipe and a discharge pipe, Muffler of the swash plate-type compressor, characterized in that the pulsating pressure buffer space portion for further communication step by step with the discharge chamber and the discharge port in a portion of the bottom surface of the discharge chamber including the discharge port. The method of claim 1, Muffler of the swash plate type compressor, characterized in that any one of a plurality of buffer grooves or buffer protrusions are formed in the pulsating pressure buffer space. The method according to claim 1 or 2, Muffler of the swash plate type compressor, characterized in that any one of a plurality of buffer grooves or buffer projections are formed on the bottom surface of the discharge chamber. The method of claim 1, The muffler of the swash plate-type compressor, characterized in that any one of a plurality of buffer grooves or buffer projections are formed on the bottom surface of the discharge pipe side.