JP2009079519A - Compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure capable of reducing the pulsation of a compressor by adding a simple device only on a delivery port and a suction port without complicating an internal structure of the compressor itself. <P>SOLUTION: This compressor has an in-port passage forming means which includes two or more passages communicating with the inside and the outside of a port at least at one port of a delivery port communicating with a delivery chamber and a suction port communicating with a suction chamber, and in which the length of at least one passage is different from lengths of other passages. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a compressor that suppresses generation of pulsation and noise, and particularly relates to a compressor that can achieve these by improving a discharge port portion and a suction port portion.

  Conventionally, for example, a throttle valve is provided on the suction side, a check valve is provided on the discharge side, or a muffler is provided to suppress pulsation in the compressor and the accompanying noise. Such a structure is known.

  However, when such a pulsation reducing component is provided, there is a problem that the pressure loss increases due to the throttling action, and the cost increases. Therefore, it is necessary to prevent pressure loss due to the restriction and increase power consumption, to reduce the number of parts, or to simplify parts in order to reduce costs.

On the other hand, as a prior art more relevant to the present invention, the discharge side passage is formed from two passages between the compression chamber and the discharge port, and the pulsations of the compressed fluid flowing through the passages interfere with each other. There is also known a structure in which pulsation is reduced by the above (for example, Patent Documents 1 and 2).
JP 2005-273467 A JP 2000-199488 A

  However, in the conventional pulsation reducing structure as described above, since it is necessary to form two discharge-side passages inside the cylinder head and cylinder block of the compressor, the internal structure of the compressor itself becomes complicated and difficult to process. This will increase the manufacturing cost and the manufacturing cost.

  Therefore, the object of the present invention is to reduce the pulsation of the compressor by a very simple improvement without complicating the internal structure of the compressor itself, in particular by adding a simple device only to the discharge port portion and the suction port portion. An object of the present invention is to provide a structure that can be efficiently reduced.

  In order to solve the above-described problem, a compressor according to the present invention includes two or more ports communicating inside and outside of a port portion in at least one of a discharge port communicating with the discharge chamber and a suction port communicating with the suction chamber. The in-port passage forming means has a passage, and the length of at least one passage and the length of the other passages are different from each other. That is, a predetermined in-port passage forming means is provided only in the port.

  In such a compressor, the fluid that generates pulsation always passes through the discharge port and the suction port, but at that time, it passes through two or more passages having different lengths. Since the passage lengths are different from each other, a phase difference occurs in the pulsation of the fluid passing through each passage, and the pulsation is reduced by dispersing the fluid having the phase difference. Since the in-port passage forming means for reducing pulsation only needs to be inserted (for example, press-fitted) into a predetermined position in the port, two or more passages for reducing pulsation are very easily formed, and There is no risk of complicating the internal structure of the compressor itself. Therefore, the target pulsation reducing structure can be realized without increasing the difficulty of processing and increasing the manufacturing cost. In addition, since a plurality of passages are divided and a passage having a relatively long passage length exists, an appropriate throttling effect and a flow rectifying effect in the passage can be expected. Can be promoted.

  The in-port passage forming means can be constituted by at least one piece member inserted into the port, for example. In other words, it can be easily manufactured as a small part separate from the compressor itself, and it is extremely easy to insert it into the target port and hold it in place by press-fitting and other fixing methods. A target pulsation reduction structure is realized. The material of the piece member is not particularly limited as long as a predetermined two or more passage structures are maintained. For example, any of iron, aluminum, and plastic can be employed.

  The two or more passages may be formed as passages that communicate with the inside and the outside of the port portion substantially independently. Therefore, for example, the same number of passage openings may be formed on the inner and outer end faces of the port portion of the in-port passage forming means.

  The passage forming structure in the in-port passage forming means is not particularly limited, and each passage may be formed so as to be completely contained in the in-port passage forming means, or at least one passage is provided. Further, it is possible to adopt a form formed by a part of the outer peripheral surface of the in-port passage forming means and a part of the inner peripheral surface of the port. In the case of the latter form, for example, at least one passage of the in-port passage forming means may be formed as a spirally extending passage.

  Such a compressor structure according to the present invention is particularly effective when the fluid to be compressed is a gas (gas) that is likely to be pulsated, and is effective when the fluid to be compressed is made of a refrigerant, for example. Further, in the case of a compressor used in a vehicle, particularly a compressor used in a vehicle air conditioner, it is required to suppress the transmission of pulsation and vibration caused by the operation of the compressor to the inside of the vehicle. The structure of the compressor is particularly suitable.

  According to the compressor of the present invention, the pulsation can be reduced very simply by providing the in-port passage forming means in the port without complicating the internal structure of the compressor itself.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
Various embodiments when the present invention is applied to the suction port portion of the compressor will be described below, but the present invention can be similarly applied to the discharge port portion.

  First, FIG. 1 shows an example of a compressor to which the structure according to the present invention can be applied. FIG. 1 shows a fixed capacity swash plate compressor 1. However, the present invention can be applied to a variable capacity swash plate type compressor, and can also be applied to a compressor other than a swash plate type, such as a vane type compressor. It is applicable to the machine. In this embodiment, a crank chamber 3 is formed by the front housing 2, and a swash plate 5 having a constant inclination angle that is rotationally driven by the drive shaft 4 is disposed in the crank chamber 3. The rotational movement of the swash plate 5 is converted into a reciprocating motion of each piston 9 inserted into a cylinder bore 8 formed in the cylinder block 7 through a pair of shoes 6. A cylinder head 11 is attached to the cylinder block 7 via a valve plate 10, and a suction port 12 for sucking a fluid to be compressed, for example, a refrigerant from the outside, is provided in the cylinder head 11. The fluid to be compressed sucked from the suction port 12 is sucked into the suction chamber 13 formed in the cylinder head 11, and from there, the cylinder bore 8 through the suction hole 14 and the suction valve 15 according to the reciprocation of the piston 9. Inhaled. The fluid compressed by the piston 9 in the cylinder bore 8 is discharged into the discharge chamber 18 through the discharge hole 16 and the discharge valve 17, from which a discharge port (not shown) is shown as a discharge port 19 in FIG. It is discharged to the outside of the compressor. When such suction or discharge is performed, when the suction valve 15 or the discharge valve 17 is opened, the inside of the cylinder bore 8, the suction chamber 13, or the discharge chamber 18 is positioned at the position of the suction hole 14 or the discharge hole 16 of the valve plate 10. Pulsation occurs due to the pressure difference. This pulsation is reduced or suppressed by providing the in-port passage forming means according to the present invention in the port according to the following embodiments.

  FIG. 2 shows the internal structure of the cylinder head 11 as the compressor structure according to the first embodiment of the present invention, particularly the internal structure of the suction port 12 portion. At a predetermined position in the suction port 12, there are two or more passages 21, 22 communicating between the inside and the outside of the suction port 12, and the length of at least one passage 21 and the length of the other passage 22 are different from each other. (In this embodiment, the passage 21 is formed as a relatively long passage and the passage 22 is formed as a relatively short passage, and these passage portions are intentionally hatched and displayed.) A passage forming means 23 is provided. The in-port passage forming means 23 is formed in a cylindrical piece member inserted into the suction port 12, and is divided into two members 23a and 23b in this embodiment. Each member 23a, 23b is formed with a passage 21a, 21b bent in an L shape and a passage 22a, 22b penetrating straight, and the suction port so that both members 23a, 23b are arranged back to back. By being press-fitted in the inside of the port 12, one passage 21 having a relatively long length which is bent and extended, which communicates with the inside and outside of the in-port passage forming means 23, and a straight shape having a relatively short length. Two passages 22 extending in the direction are formed.

  As described above, the two passages 21 and 22 having different lengths are formed in the suction port 12 by the in-port passage forming means 23, so that a phase difference occurs in the pulsation of the fluid passing through the respective passages 21 and 22. The pulsation is reduced by dispersing the fluid having a phase difference. Since the in-port passage forming means 23 for reducing the pulsation is disposed only in the suction port 12, the internal structure of the compressor 1 itself is not complicated, and an excellent pulsation reducing effect can be achieved by a very simple improvement. Is obtained. In addition, since a plurality of passages 21 and 22 are divided and there is a passage 21 having a relatively long passage length, a moderate throttling effect and a flow rectifying effect in the passage can be expected, thereby further reducing pulsation. Is possible. Further, by press-fitting the in-port passage forming means 23 made of a piece member into the suction port 12, an increase in the rigidity of the suction port 12 can be expected, whereby vibrations are transmitted to the pipes and hoses connected to the suction port 12. It can also be expected to be difficult.

  FIG. 3 shows the internal structure of the cylinder head 11 as the compressor structure according to the second embodiment of the present invention, particularly the internal structure of the suction port 12 portion. At a predetermined position in the suction port 12, there are two or more passages 31, 32 communicating between the inside and the outside of the suction port 12, and the length of at least one passage 31 and the length of the other passage 32 are different from each other. (In this embodiment, the passage 31 is formed as a relatively long passage and the passage 32 is formed as a relatively short passage, and these passage portions are intentionally hatched and displayed.) An in-port passage forming means 33 made of a piece member is provided by press fitting. In the present embodiment, two passages 31a having a long passage length extending spirally by two spirally extending grooves formed on the outer peripheral surface of the in-port passage forming means 33 and the inner peripheral surface of the suction port 12. 31b is formed, and a single passage 31 penetrating straight is formed in the central portion of the in-port passage forming means 33. Fluid (for example, refrigerant) flows in from the suction side end surface openings of the passages 31a and 31b extending in a spiral manner as indicated by arrows in FIG. Even in such a configuration, substantially the same operation and effect as the embodiment shown in FIG. 2 can be obtained.

  FIG. 4 shows the internal structure of the cylinder head 11 as a compressor structure according to the third embodiment of the present invention, particularly the internal structure of the suction port 12 portion. At a predetermined position in the suction port 12, there are two or more passages 41, 42 communicating with the inside and outside of the suction port 12, and the length of at least one passage 41 and the length of the other passage 42 are different from each other. (In this embodiment, the passage 41 is formed as a relatively long passage and the passage 42 is formed as a relatively short passage, and these passage portions are intentionally hatched and displayed.) A passage forming means 43 is provided by press fitting. In this embodiment, the in-port passage forming means 43 includes an upper flow path changing plate 44 made of a disk-like member inserted into the suction port 12, a lower flow path changing plate 45 having the same shape, It consists of a mandrel 46 made of a cylindrical member that extends through the center of the path change plates 44 and 45. A hole 41a is provided at an eccentric position of the upper flow path changing plate 44, a hole 41b is provided at a position eccentric to the opposite side of the lower flow path changing plate 45, and the both flow path changing plates 44, 45 are arranged with an interval therebetween. Thus, a passage 41 that is bent and extends is formed. Further, a passage 42 extending in a straight shape is formed by an internal hollow portion of a mandrel 46 that extends through the central portions of both flow path changing plates 44 and 45. Even in such a configuration, substantially the same operation and effect as the embodiment shown in FIG. 2 can be obtained.

  FIG. 5 shows the internal structure of the cylinder head 11 as the compressor structure according to the fourth embodiment of the present invention, particularly the internal structure of the suction port 12 portion. At a predetermined position in the suction port 12, there are two or more passages 51, 52 communicating between the inside and outside of the suction port 12, and the length of at least one passage 51 and the length of the other passage 52 are different from each other. (In this embodiment, the passage 51 is formed as a relatively long passage and the passage 52 is formed as a relatively short passage, and these passage portions are intentionally hatched and displayed.) A passage forming means 53 is provided by press fitting. In this embodiment, compared with the embodiment shown in FIG. 4, the in-port passage forming means 53 is configured as one member, and a crescent-shaped opening is formed at opposite positions on both end surfaces on the outer peripheral surface. Then, both end surface side portions of the passage 51 that bends and extends in cooperation with the inner peripheral surface of the suction port 12 are formed, and the outer peripheral surface of the in-port passage forming means 53 located between the both end surface side portions is formed as a donut. The passage 51 is bent and extended from one opening to the other opening by cutting into a shape. In this passage 51, the fluid flows so as to bypass the portion cut out in a donut shape, so that the length of the passage 51 can be made longer. Even in such a configuration, substantially the same effect as the mode shown in FIG. 2 can be obtained, and a higher pulsation reduction effect can be expected because the difference in the passage length between the passages 51 and 52 can be increased.

  FIG. 6 shows the internal structure of the cylinder head 11 as the compressor structure according to the fifth embodiment of the present invention, particularly the internal structure of the suction port 12 portion. At a predetermined position in the suction port 12, there are two or more passages 61 and 62 communicating between the inside and the outside of the suction port 12, and the length of at least one passage 61 and the length of the other passage 62 are different from each other. (In this embodiment, the passage 61 is formed as a relatively long passage and the passage 62 is formed as a relatively short passage, and these passage portions are intentionally hatched and displayed.) A passage forming means 63 is provided by press fitting. In this embodiment, one of the passages 61 is merged into a single passage after extending in a V shape from two openings on one end face when viewed in the cross-sectional direction of the in-port passage forming means 63, and to the other end face. It extends and opens. The other passage 62 extends straight through the in-port passage forming means 63. By adopting such a configuration of the passage 61, the length of the passage 61 can be made longer than the length of the passage 62, and the two flows collide at the V-shaped joining portion of the passage 61, The flow velocity can be reduced as compared with the flow of the straight passage 62, and the phase of pulsation can be greatly shifted. By giving a phase difference to the pulsation of the fluid flowing through the passages 61 and 62, the pulsation is effectively reduced. Therefore, even in such a configuration, substantially the same operational effects as the above-described embodiments can be obtained.

  FIG. 7 shows the internal structure of the cylinder head 11 as a compressor structure according to the sixth embodiment of the present invention, particularly the internal structure of the suction port 12 portion. At a predetermined position in the suction port 12, there are two or more passages 71, 72 communicating between the inside and outside of the suction port 12, and the length of at least one passage 71 and the length of the other passage 72 are different from each other. (In this embodiment, the passage 71 is formed as a relatively long passage and the passage 72 is formed as a relatively short passage, and these passage portions are intentionally hatched and displayed.) A passage forming means 73 is provided by press fitting. In this embodiment, one of the passages 71 is bent and extended in a horizontal V shape as a whole of the passage as viewed in the cross-sectional direction of the in-port passage forming means 73 while the cross section of the passage 71 is elliptical. The other two passages 72 are provided on both sides of the passage 71 in total, but all of them extend simply through the in-port passage forming means 73 in a straight shape. By adopting such a configuration of the passage 71, the length of the passage 71 can be made longer than the length of the passage 72. Further, the passage 71 that is bent and extended in the shape of a horizontal V is opened to the outer peripheral surface of the member constituting the in-port passage forming means 73 at the bent portion. Machining can be performed on the constituent members without any problem. Even in such a configuration, substantially the same operation and effect as the embodiment shown in FIG. 2 can be obtained.

  Thus, the in-port passage forming means having two or more passages having different passage lengths can be configured in various forms. Further, as described above, the structure of the compressor according to the present invention is not limited to the suction port but can be similarly applied to the discharge port.

  The structure of the compressor according to the present invention can be applied to any compressor that is provided with a suction port and a discharge port and is required to reduce pulsation.

It is a longitudinal cross-sectional view of the whole compressor which shows an example of the compressor which can apply the structure which concerns on this invention. Port cross-sectional view in (B) and (B) in longitudinal cross-sectional views along line XYZ in cross-sectional views (A) and (A), showing the main part of the compressor according to the first embodiment of the present invention It is the longitudinal cross-sectional view (E) in alignment with the EE in D arrow view (D) in (D) in (D), and the exploded view (C) of a formation means. Port cross-sectional view in cross-sectional views (B) and (B) taken along line XYZ in cross-sectional views (A) and (A) showing the main part of the compressor according to the second embodiment of the present invention. It is a D arrow line view (D) in side view (C), (B) of a formation means. Port cross-sectional view in cross-sectional views (B) and (B) along line XYZ in cross-sectional views (A) and (A), showing the main part of the compressor according to the third embodiment of the present invention. It is a D arrow line view (D) in the exploded views (C) and (B) of a formation means. Port cross-section in (B) and (B) in longitudinal section along line XYZ in cross-sectional views (A) and (A) showing the main part of the compressor according to the fourth embodiment of the present invention It is the longitudinal cross-sectional view of a formation means, and the cross-sectional views (C) and (D) in D (V) along a VV line. Port cross-section in (B) and (B) in longitudinal cross-sectional view along line XYZ in cross-sectional views (A) and (A) showing the main part of the compressor according to the fifth embodiment of the present invention It is the D arrow line view (D) in the longitudinal cross-sectional views (C) and (B) of a formation means. Port internal passage in (B) and (B) in longitudinal cross-sectional view (B) taken along line XYZ in cross-sectional views (A) and (A) showing the main part of the compressor relating to the sixth embodiment of the present invention It is the D arrow line view (D) in the longitudinal cross-sectional views (C) and (B) of a formation means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Compressor 2 Front housing 3 Crank chamber 4 Drive shaft 5 Swash plate 6 Shoe 7 Cylinder block 8 Cylinder bore 9 Piston 10 Valve plate 11 Cylinder head 12 Suction port 13 Suction chamber 14 Suction hole 15 Suction valve 16 Discharge hole 17 Discharge valve 18 Discharge Chamber 19 Discharge port 21, 31, 41, 51, 61, 71 Long passage 22, 32, 42, 52, 62, 72 Short passage 23, 33, 43, 53, 63, 73 In-port passage formation means 44 Upper flow path Change plate 45 Lower flow path change plate 46 Mandrel

Claims (8)

  At least one of the discharge port communicating with the discharge chamber and the suction port communicating with the suction chamber has two or more passages communicating with the inside and the outside of the port portion, and the length of at least one passage and the other passage A compressor characterized in that it is provided with in-port passage forming means having different lengths.   The compressor according to claim 1, wherein the in-port passage forming means includes at least one piece member inserted into the port.   The compressor according to claim 2, wherein the piece member is made of iron, aluminum, or plastic.   The compressor according to any one of claims 1 to 3, wherein the same number of passage openings are formed on the inner and outer end faces of the port portion of the in-port passage forming means.   5. The at least one passage of the in-port passage forming means is formed by a part of an outer peripheral surface of the in-port passage forming means and a part of an inner peripheral surface of the port. Compressor.   The compressor according to claim 5, wherein at least one passage of the in-port passage forming means is formed as a spirally extending passage.   The compressor according to any one of claims 1 to 6, wherein the fluid to be compressed is made of a refrigerant.   The compressor in any one of Claims 1-7 which consists of a compressor used for a vehicle air conditioner.