WO2008020004A1

WO2008020004A1 - A compressor

Info

Publication number: WO2008020004A1
Application number: PCT/EP2007/058355
Authority: WO
Inventors: Ergin Arslan; Kenan Atac; Cetin Aydintug; Faruk Bayraktar
Original assignee: Arcelik Anonim Sirketi
Priority date: 2006-08-14
Filing date: 2007-08-13
Publication date: 2008-02-21
Also published as: TR200900591T1

Abstract

The present invention relates to a compressor (1) wherein the noise generated by the refrigerant fluid is decreased by a suction muffler (2), the suction muffler (2) includes therein resonator rooms (4) serving to dampen the vibration, flow pipes (7) through which the refrigerant fluid flows, openings (8) providing the refrigerant fluid from the flow pipe (7) to diffuse into the resonator rooms (4) for dampening the vibration waves and an acoustic tuning means (9) that is moved on the opening (8) providing the opening (8) to be closed or opened or partially closed thereby changing the area thereof.

Description

Description A COMPRESSOR

[0001] The present invention relates to a compressor comprising a suction muffler that attenuates the noise generated by the fluid in the refrigerant cycle during circulation.

[0002] The motion of the refrigerant fluid in hermetic compressors used in the cooling devices, for example refrigerators, is a major source of noise. The sound energy resulting from the motion of the refrigerant fluid during operation of the compressor is transmitted to the compressor casing and propagates outside as compressor noise. In compressors suction mufflers are used for attenuating the pressure oscillations and thereby decreasing the noise power level resulting from the operation of the piston in the cylinder making periodic compression-expansion movements and opening and closing of the suction valve. Inside a suction muffler, resonator chambers are provided having different volumetric resonance frequencies for decreasing the noise power level, refrigerant fluid tubes passing through the chambers and openings for diffusion of the refrigerant fluid into the chambers. Vortexes can be formed during the ejection of the refrigerant fluid flowing in the flow tubes and openings that do not have the suitable geometry and position can become a source of noise instead of attenuating the noise.

[0003] In the United States of America patent document no. US6446454, a suction muffler for a compressor includes more than one chamber for temporary storage of the refrigerant, a resonator chamber for attenuating a noise of a specific frequency, and a vibration plate in one of the chambers. By means of the vibration plate, the pressure by a sudden increase in volume of the refrigerant fluid is decreased and the pulsating flows occurring in the piston and the transmission of noise from a suction valve are prevented.

[0004] In the International patent application no. WO05066494, a suction muffler of a compressor comprises muffler chambers having different volumetric resonance frequencies to achieve acoustic attenuation at different frequencies, and the refrigerant fluid flows through a flow pipe passing through the chambers. In the suction muffler, furthermore attenuation conduits are provided having a different cross-sectional area at the ends which open to different muffler chambers between the resonator rooms that is used to bypass the acoustical energy and minimize the noise at the desired frequencies.

[0005] The aim of the present invention is the realization of a compressor comprising a suction muffler that can adjust the noise level for different models and for different ca- parities.

[0006] The compressor realized in order to attain the aim of the present invention is explicated in the claims.

[0007] In the compressor, a suction muffler is used for decreasing the noise generated by the refrigerant fluid and the refrigerant fluid flows through the flow pipes passing through the suction muffler. Openings are provided on the flow pipes that contribute in the refrigerant fluid to be diffused into the resonator rooms from the flow pipes and thereby decrease the noise by damping the pressure waves. In the embodiment of the present invention, an acoustic tuning means is used that is disposed on the flow pipes, moved over the openings on these elements for partially or entirely closing thereof in order to change the areas of these openings.

[0008] In an embodiment of the present invention, the acoustic tuning means can make a sliding movement in the axial direction on the flow pipe by pulling-pushing from outside the suction muffler and provides the area of the opening on the wall of the flow pipe to be increased or decreased.

[0009] In another embodiment of the present invention, the acoustic tuning means is configured as a pipe that is inserted within the flow pipe and is rotated from outside of the suction muffler casing for decreasing or increasing the area of the opening on the wall of the flow pipe.

[0010] In another embodiment of the present invention, a tuning hole is disposed on the acoustic tuning means, having virtually the same size as the opening, that entirely or partially overlaps with the opening or does not overlap when the acoustic tuning means is rotated or moved axially, thus providing the area of the opening on the flow pipe to be adjusted

[0011] In another embodiment of the present invention, tuning holes of various sizes are disposed on the acoustic tuning means. In this embodiment, the tuning holes can be arranged on a linear line along the acoustic tuning means or circularly around an acoustic tuning means configured as pipe. The acoustic tuning means is moved or turned in the axial direction on the flow pipe such that the tuning hole having the desired size laces the opening on the flow pipe and the area of the opening is adjusted.

[0012] In the production and testing phases of the compressor, while the noise level is adjusted by the acoustic tuning means in the suction muffler, the noise level is measured for different compressor models or for the same compressor operating at different capacities aiming to determine the most suitable opening areas and the acoustic tuning means is fixed to the suction muffler in the latest adjusted position by various methods. Consequently, the adjustment made during the production phase is provided not to change during usage.

[0013] The resonance frequencies of the resonator rooms can be precisely adjusted by changing areas of the openings by means of the acoustic tuning means and the frequencies that produce noise can be controlled.

[0014] The compressor realized in order to attain the aim of the present invention is illustrated in the attached figures, where:

[0015] Figure 1 - is the cross-sectional view of a compressor.

[0016] Figure 2 - is the schematic view of a suction muffler.

[0017] Figure 3 - is the perspective view of a suction muffler.

[0018] Figure 4 - is the schematic view of a suction muffler in another embodiment of the present invention.

[0019] Figure 5 - is the perspective view of an acoustic tuning means.

[0020] Figure 6 - is the perspective view of an acoustic tuning means in another embodiment of the present invention.

[0021] The elements illustrated in the drawings are numbered as follows:

1. Compressor

2. Suction muffler

3. Casing

4. Resonator room

5. Inlet orifice

6. Outlet orifice

7. Flow pipe

8. Opening

9. Acoustic tuning means

10. Tuning hole

[0022] The compressor (1) comprises a suction muffler (2) that attenuates the noise generated by the refrigerant fluid passing therethrough.

[0023] The suction muffler (2) comprises a casing (3) forming the outer wall thereof and guarding the components within, one or more resonator rooms (4) inside the casing (3) serving to dampen the vibration, one or more flow pipes (J) through which the refrigerant fluid flows having an inlet orifice (5) allowing entrance of the refrigerant fluid returning from the refrigerant cycle into the suction muffler (2) and an outlet orifice (6) for discharge of the refrigerant fluid from the suction muffler (2), and one or more openings (8) disposed on the wall of the flow pipe (7), providing the refrigerant fluid from the flow pipe (J) to be diffused into the resonator room (4)

[0024] The suction muffler of the present invention (2) comprises an acoustic tuning means (9) that can be moved on the opening (8) and changing the area by partially or entirely closing the opening (8)

[0025] The acoustic tuning means (9) can be moved, whereby the area of the opening (8) can be changed and the opening (8) areas that correspond to the least noise level are determined thus noise adjustment can be made by controlling the frequencies that generate noise in the resonator room (4)

[0026] In an embodiment of the present invention, the acoustic tuning means (9) is configured as a sliding cover or flap that makes a sliding movement in the axial direction on the flow pipe (J) by pulling pushing from outside the casing (3) enabling the area of the opening (8) disposed on the wall of the flow pipe (J) to be decreased or increased (Figures 2, 3 and 5)

[0027] In another embodiment of the present invention, the acoustic tuning means (9) is configured as a pipe, inserted into the flow pipe (J), that can rotate around the axis of the flow pipe (J) inside or outside of the flow pipe (J), and serves to increase or decrease the area of the opening (8) disposed on the wall of the flow pipe (J) (Figure 4 and 6) In this embodiment, the acoustic tuning means (9), if desired, can also move telescopically in the axial direction besides the rotating movement on the flow pipe (J)

[0028] In another embodiment of the present invention, the suction muffler (2) comprises a tuning hole (10) disposed on the acoustic tuning means (9) having virtually the same size as the opening (8) The tuning hole (10) moves to entirely overlap, partially overlap or not overlap with the opening (8) by making the acoustic tuning means to move rotationally or axially, and the area of the opening (8) on the flow pipe (J) is adjusted (Figure 4)

[0029] In another embodiment of the present invention, the suction muffler (2) comprises more than one tuning hole (10) disposed on the acoustic tuning means (9) having areas of different sizes (Figures 5, 6)

[0030] In a version of this embodiment, tuning holes (10) of different sizes are arranged along on the acoustic tuning means (9) and the acoustic tuning means (9) is moved in the axial direction on the flow pipe (J) such that the tuning hole (10) having the desired area size feces the opening (8) and the area of the opening (8) is adjusted (Figure 5)

[0031] In a second version of this embodiment, tuning holes (10) of different sizes are arranged circularly around the pipe-shaped acoustic tuning means (9) and the acoustic tuning means (9) is moved rotationally on the flow pipe (7) such that the tuning hole (10) having the desired area size laces the opening (8) and the area of the opening (8) is adjusted (Figure 6)

[0032] The acoustic tuning means (9) can be easily moved by means of a handle that extends out of the casing (3) without having to reach inside the casing (3)

[0033] In the production and testing phases of the compressor (1), while the noise level is adjusted by the acoustic tuning means (9) in the suction muffler (2), the noise level is measured for different compressor (1) models or for the same compressor (1) operating at different capacities, aiming to find the most suitable opening (8) areas and the acoustic tuning means (9) is fixed to the suction muffler (2) in the latest adjusted position by various methods. Consequently, the adjustment made during the production phase is provided not to change during utilization.

[0034] The resonance frequencies of the resonator rooms (4) can be precisely adjusted by changing areas of the openings (8) by means of the acoustic tuning means (9) and the frequencies that produce noise in the suction muffler (2) can be controlled.

[0035] Besides the acoustic adjustment made in the suction muffler (2) by means of the acoustic tuning means (9), the coefficient of performance of the compressor (1) is enhanced by regulating the flow of the refrigerant fluid.

[0036] The suction mufflers (2) comprising acoustic tuning means (9) can be used in different compressor (1) models having different capacities and cost advantage is provided in the production.

Claims

[0001] A compressor (1) comprising a suction muffler (2) having a casing (3) forming the outer wall thereof and guarding the components within, one or more resonator rooms (4) disposed inside the casing (3) serving to dampen the vibration, one or more flow pipes (7) through which the refrigerant fluid flows having an inlet orifice (5) allowing entrance of the refrigerant fluid returning from the refrigerant cycle and an outlet orifice (6) for the exit of the refrigerant fluid, and one or more openings (8) disposed on the wall of the flow pipe (7), providing the refrigerant fluid from the flow pipe (7) to diffuse into the resonator room (4), and characterized by a suction muffler (2) comprising an acoustic tuning means (9) that can be moved on the opening (8), to partially or entirely close the opening (8) and thereby change the area.

[0002] A compressor (1) as in Claim 1, characterized by the suction muffler (2) comprising a tuning hole (10) disposed on the acoustic tuning means (9) with virtually the same size as the opening (8) that moves to entirely or partially overlap with the opening (8) when the acoustic tuning means (9) is moved rota- tionally or axially.

[0003] A compressor (1) as in Claim 2, characterized by the suction muffler (2) comprising more than one tuning hole (10) disposed on the acoustic tuning means (9) having areas of different sizes.

[0004] A compressor (1) as in Claim 3, characterized by the acoustic tuning means (9) that can be pulled or pushed from outside the casing (3) to make a sliding movement in the axial direction on the flow pipe (7).

[0005] A compressor (1) as in Claim 4, characterized by the tuning holes (10) arranged along the acoustic tuning means (9), the one having the desired area size brought to face the opening (8) when the acoustic tuning means (9) is moved in the axial direction.

[0006] A compressor (1) as in Claim 3, characterized by the suction muffler (2) comprising an acoustic tuning means (9) that can make a rotational movement around the axis of the flow pipe (7) inside or outside of the flow pipe (7).

[0007] A compressor (1) as in Claim 6, characterized by the tuning holes (10) arranged circularly around the acoustic tuning means (9), the one having the desired area size brought to face the opening (8) when the acoustic tuning means (9) is moved rotationally. A compressor (1) as in any one of the above claims, characterized by the acoustic tuning means (9) comprising a handle that extends out of the casing (3).