JP2009281325A - Compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent seizure in upper and lower end surfaces of a blade in a compressor. <P>SOLUTION: The blade 62b integrally formed with a roller 62a moves along with the roller 62a moving along an inner circumferential surface of a cylinder chamber 71 and moves into and out from the cylinder chamber 71 and a blade storing chamber 75. In a side surface of a low-pressure chamber 71a side of the blade 62b, recessed parts 62d are formed at its upper end part and it lower end part. The recessed parts 62d are positioned only at portions in a bush arranging space 75a in the side surface of the blade 62b where the roller 62a becomes closest to the blade storing chamber 75, the blade 62b is entered in the blade storing chamber 75 most deeply and the roller 62a is positioned farthest from the blade storing chamber 75 and the blade 62b is entered and positioned in a cylinder chamber 71 most deeply. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a compressor that compresses a refrigerant.

  In the compressor described in Patent Document 1, a piston in which a roller moving along the inner peripheral surface of the cylinder chamber and a blade extending from the side surface of the roller toward the outside of the roller are integrated in the cylinder chamber. Is arranged, and the refrigerant in the cylinder chamber is compressed by moving the roller as described above.

JP 2005-2832 A

  Here, in the compressor described in Patent Document 1, in order to prevent seizure between the piston moving in the cylinder chamber and the upper and lower end surfaces of the cylinder chamber, lubricating oil flows between them. However, in the piston, since the blade moves less than the roller, the amount of oil circulating on the upper and lower end surfaces of the blade is small. As a result, the blade is not sufficiently cooled by the oil, and the upper and lower sides of the blade and the cylinder chamber are not cooled. There is a possibility that seizure may occur between the end faces.

  An object of the present invention is to provide a compressor capable of preventing seizure on the upper and lower end surfaces of a blade.

  A compressor according to a first aspect of the present invention is disposed in a sealed space, a cylinder chamber for compressing a refrigerant, a blade storage chamber extending from the inner peripheral surface of the cylinder chamber toward the outside of the cylinder chamber, And a cylinder in which a refrigerant introduction channel for introducing refrigerant into the cylinder chamber is formed, a roller that is disposed inside the cylinder chamber and moves along the inner peripheral surface of the cylinder chamber, A blade that is disposed in the blade housing chamber, and part of the roller enters and exits the cylinder chamber as the roller moves, and divides the cylinder chamber into the two spaces together with the roller. A concave portion is formed on the side surface of the refrigerant introduction channel side.

  In a compressor in which rollers and blades move in a cylinder chamber, lubricating oil flows between the rollers and blades and the upper and lower surfaces of the cylinder chamber. Temperature rise due to sliding with the upper and lower surfaces of the chamber is suppressed, and this prevents the rollers and blades from contacting the upper and lower surfaces of the cylinder chamber to cause seizure. Since the amount of movement of the blade is smaller than the amount of movement of the roller, the lubricating oil between the blade and the upper and lower surfaces of the cylinder chamber is difficult to circulate. As a result, depending on the lubricating oil, the upper and lower surfaces of the blade and the cylinder chamber There is a risk that seizure will occur because the temperature rise due to sliding is not sufficiently suppressed.

  However, in this compressor, since the concave portion is formed on the side surface of the blade on the refrigerant introduction flow path side, the refrigerant introduced from the refrigerant introduction flow channel flows into the concave portion, and the blade is cooled by this refrigerant. It is possible to prevent seizure from occurring between the upper surface and the lower surface of the cylinder chamber.

  A compressor according to a second aspect of the present invention is the compressor according to the first aspect of the present invention, wherein the concave portion is located on the side surface of the blade on the side of the refrigerant introduction flow path where the roller is farthest from the blade storage chamber. It is formed only in the portion located in the cylinder chamber in the state of

  Since the cylinder chamber is divided into two spaces by the roller and the blade, when the roller is located farthest from the blade storage chamber, the blade enters the cylinder chamber most greatly, and the two cylinder chambers A large force is applied to the blade due to the pressure difference in the space. At this time, if a concave portion is formed in a portion of the blade located in the blade storage chamber, the contact area between the blade receiving the force and the wall surface of the blade storage chamber or the bush disposed in the blade storage chamber is reduced. There is a risk that a large pressure is applied to the blade.

  However, in this compressor, since the concave portion is formed only in the portion of the blade located in the cylinder chamber in a state where the roller is farthest from the blade storage chamber, the blade and the wall surface or bush of the blade storage chamber are formed. A sufficient contact area can be ensured, and a large pressure can be prevented from being applied to the blade.

  A compressor according to a third invention is the compressor according to the first or second invention, wherein the blade housing chamber communicates with the cylinder chamber, and the blade is slidably sandwiched therein. A bush arrangement space in which the bush is arranged, and a bush back space communicating with the bush arrangement space on the side opposite to the cylinder chamber, and the concave portion on the side surface of the blade on the refrigerant introduction flow path side, The roller is formed only in a portion located in the bush arrangement space in a state where the roller is in a position closest to the blade storage chamber.

  When the recess is located in the bush back space, the lubricating oil heated by the compressed and heated refrigerant leaks through the recess into the space on the coolant introduction flow path side of the cylinder chamber, and as a result, There is a possibility that the temperature of the refrigerant in the space on the side of the refrigerant introduction flow path in the cylinder chamber will rise and the compression efficiency of the compressor will decrease.

  However, in this compressor, the concave portion is formed only in the portion located in the bushing arrangement space of the blade in a state where the roller is closest to the blade storage chamber and the blade is most greatly entered into the blade storage space. Therefore, the concave portion is not always located in the bush back space, and such high temperature lubricating oil does not easily flow.

  A compressor according to a fourth invention is the compressor according to the third invention, wherein the recess is formed in at least one of an upper end portion and a lower end portion on a side surface of the blade on the refrigerant introduction flow path side. It is characterized by that.

  If the recess extends over the entire area in the vertical direction of the blade, the bush may be caught by the recess and the blade may not move smoothly. However, in this compressor, since the concave portion is formed in at least one of the upper end portion and the lower end portion of the blade, and the concave portion is not formed in the central portion of the blade, the central portion of the blade where the concave portion is not formed is the bush. The bush is less likely to get caught in the recess. Further, since the concave portion is formed in at least one of the upper end portion and the lower end portion of the blade, it is possible to effectively prevent the blade and at least one of the upper surface and the lower surface of the cylinder chamber from being seized.

  A compressor according to a fifth invention is the compressor according to the first to fourth inventions, and includes an upper partition member that defines the upper surface of the cylinder chamber, and a lower partition member that defines the lower surface of the cylinder chamber. The upper partition wall member and the lower partition wall member are made of materials having different hardnesses, and the recesses are formed at upper and lower end portions on the side surface of the blade on the coolant introduction channel side. Of these, at least the upper partition wall member and the lower partition wall member are formed on the side having higher hardness.

  When the upper member and the lower member are made of materials having different hardnesses, when the blade and the higher one of the upper and lower surfaces of the cylinder chamber slide, these sliding surfaces are not easily made. Since the temperature rises easily, seizure is particularly likely to occur between them.

  Therefore, in this compressor, the upper surface and the lower surface of the cylinder and the cylinder chamber are formed by forming a concave portion on at least the upper member and the lower member of the blade that are located on the higher hardness side of the upper member and the lower member. Can be effectively prevented.

  As described above, according to the present invention, the following effects can be obtained.

  In the first invention, since the concave portion is formed on the side surface of the blade on the refrigerant introduction flow path side, the refrigerant introduced from the refrigerant introduction flow channel flows into the concave portion, and the blade is cooled by this refrigerant. Baking can be prevented from occurring between the upper surface and the lower surface of the cylinder chamber.

  In the second invention, since the concave portion is formed only in a portion of the blade located in the cylinder chamber in a state where the roller is farthest from the blade storage chamber, the blade and the wall surface or bush of the blade storage chamber The contact area can be sufficiently ensured, and it is possible to prevent a large pressure from being applied to the blade.

  In the third aspect of the invention, since the roller is located closest to the blade storage chamber, the recess is formed only in the portion of the blade located in the bushing arrangement space with the blade entering the blade storage space most. The concave portion is not always located in the back space of the bush, and such high temperature lubricating oil does not easily flow.

  In the fourth invention, the concave portion is formed in at least one of the upper end portion and the lower end portion of the blade, and the concave portion is not formed in the central portion of the blade. Therefore, the central portion of the blade in which the concave portion is not formed is the bush. It comes into contact and the bush is less likely to get caught in the recess. Further, since the concave portion is formed in at least one of the upper end portion and the lower end portion of the blade, it is possible to effectively prevent the blade and at least one of the upper surface and the lower surface of the cylinder chamber from being seized.

  In the fifth aspect of the invention, the recesses are formed at least on the higher side of the upper member and the lower member of the upper end portion and the lower end portion of the blade, whereby the blade and the upper and lower surfaces of the cylinder chamber are formed. Baking can be effectively prevented.

  Hereinafter, preferred embodiments of the present invention will be described.

  FIG. 1 is a schematic configuration diagram of a compressor according to the present embodiment. The compressor 1 is, for example, a compressor incorporated in a refrigeration cycle (not shown) such as an air conditioner, and compresses a refrigerant from which moisture is removed, which is introduced from a suction pipe 24 described later, and an upper end portion thereof. Compressed refrigerant is discharged from the discharge pipe 25 arranged in the. As shown in FIG. 1, the compressor 1 includes a casing 11, a motor 12, and a compression mechanism 13.

  The casing 11 includes a body 21, a top 22 and a bottom 23. The trunk | drum 21 is a substantially cylindrical member extended in the up-down direction, The upper and lower ends are opening. Further, two suction pipes 24 for introducing the refrigerant from the refrigeration cycle are arranged on the side surface of the body 21 at the lower right end along the vertical direction. The top 22 is a member that closes the opening at the upper end of the body 21. The top 22 is provided with the above-described discharge pipe 25. The bottom 23 is a member that closes the opening at the lower end of the body 21. In the casing 11, a sealed space 26 surrounded by the body 21, the top 22, and the bottom 23 is formed.

  The motor 12 is disposed in the sealed space 26 and has a stator 31 and a rotor 32. The stator 31 is fixed to the inner wall surface of the body 21. The rotor 32 is disposed on the radially inner side of the stator 31, and an upper end portion of a shaft 60 extending in the vertical direction is fixed to a substantially central portion thereof. In the motor 12, the rotor rotates together with the shaft 60 by the magnetic force generated between the stator 31 and the rotor 32. Note that the configuration of the stator 31 and the rotor 32 is the same as that of a conventional motor, and thus detailed description thereof is omitted here.

  The compression mechanism 13 is located below the motor 12 in the sealed space 26. The compression mechanism 13 is a so-called oscillating piston type compression mechanism in which a roller and a blade are integrally formed. As shown in FIG. 1, the compression mechanism 13 is provided corresponding to two cylinders 61 and two cylinders 61. Two pistons 62, a front head 63, a middle plate 64, a rear head 65, a front muffler 66 and a rear muffler 67 are provided. The shaft 60 described above extends downward from the motor 12 and passes through the cylinder 61, piston 62, front head 63, middle plate 64, rear head 65, and front muffler 66.

  FIG. 2 is a plan view showing the configuration of one of the two cylinders 61 in FIG. 1 and the piston 62 corresponding to the cylinder 61 and the operation thereof. 3 is a cross-sectional view taken along line III-III in FIG. As shown in FIGS. 1 to 3, the two cylinders 61 are arranged along the vertical direction of FIG. 1, and a substantially circular cylinder chamber in a plan view that penetrates the cylinder 61 in the vertical direction at a substantially central portion thereof. 71 is formed.

  Further, each cylinder 61 is connected to the upper end of the cylinder chamber 71 in FIG. 2 and communicates with the cylinder chamber 71 and extends in the vertical direction in FIG. A chamber 75 is formed. The blade storage chamber 75 communicates with the cylinder chamber 71, and is connected to a bush arrangement space 75a in which a bush 73 is arranged, and an upper end portion of the bush arrangement space 75a in FIG. And a bush back space 75b).

  Further, each cylinder 61 is connected to a cylinder chamber 71 and is formed with a refrigerant introduction passage 72 extending from the cylinder chamber 71 to the right in FIG. 1, and the suction pipe 24 is connected to the refrigerant introduction passage 72. Connected to. Thereby, the refrigerant introduced into the compressor 1 from the suction pipe 24 flows into the cylinder chamber 71 (more specifically, a low pressure chamber 71a described later) through the refrigerant introduction flow path 72.

  The piston 62 is disposed inside the cylinder chamber 71 and includes a roller 62a and a blade 62b. The roller 62a has a substantially annular shape in plan view. The roller 62a is formed with a substantially circular through hole 62c at a substantially central portion thereof. Then, two eccentric portions 60 a provided in the middle of the shaft 60 and whose center axis is deviated from the center axis of the shaft 60 are fitted into the through hole 62 c. Here, the two eccentric portions 60a are arranged 180 degrees apart from each other with respect to the central axis of the shaft 60 in plan view, and the two rollers 62a into which the two eccentric portions 60a are fitted are also related to the central axis of the shaft 60. They are arranged 180 ° apart from each other. Thereby, the center of gravity of the rotating shaft 60 is positioned on the central axis of the shaft 60.

  The blade 62b extends upward from the upper end portion of the roller 62a in FIG. 2, and the lower end portion in FIG. 2 joined to the roller 62a is disposed in the cylinder chamber 71 together with the roller 62a. Is disposed in the blade housing 75. The blade 62b is slidably supported by a bush 73 disposed in the blade storage chamber 75. As shown in FIGS. 2 and 3, a recess 62 d is formed at the upper and lower ends of the right side surface of the blade 62 b in FIG. 2.

  The front head 63 (upper partition wall member) is joined to the upper surface of the upper cylinder 61 to define the upper surface of the upper cylinder chamber 71. The front head 63 is formed by casting, for example. The middle plate 64 (lower partition member) is disposed between the two cylinders 61 and defines the lower surface of the upper cylinder chamber 71 and the upper surface of the lower cylinder chamber 71. The rear head 65 is joined to the lower surface of the lower cylinder 61 and defines the lower surface of the lower cylinder chamber 71. The middle plate 64 and the rear head 65 are formed by sintering, for example, and have a higher hardness than the front head 63.

  The front muffler 66 is disposed on the upper surface of the front head 63 and forms a muffler space 76 with the front head 63. The muffler space 76 communicates with the upper cylinder chamber 71 and the sealed space 26, and the refrigerant compressed in the cylinder chamber 71 is discharged to the muffler space 76 from the discharge hole 78 formed in the front muffler 66, and the muffler space At 76, the noise is reduced and discharged to the sealed space 26.

  The rear muffler 67 is disposed on the lower surface of the rear head 65 and forms a muffler space 77 with the rear head 65. The muffler space 77 communicates with the lower cylinder chamber 71 and the sealed space 26, and the refrigerant compressed in the cylinder chamber 71 is discharged from the discharge hole 79 formed in the rear muffler 67 to the muffler space 77, and the muffler space At 77, the noise is reduced and discharged to the sealed space 26.

  Next, the operation of the compressor 1 will be described. In the compressor 1, when the motor 12 rotates, the shaft 60 rotates with the eccentric portion 60 a, and the roller 62 a has an outer peripheral surface of the cylinder chamber 71 as shown in FIGS. 2 (a) to 2 (d). In the state of being in contact with the inner peripheral surface, it moves in the clockwise direction of FIG. 2 along the inner peripheral surface of the cylinder chamber 71, and accordingly, the blade 62b formed integrally with the roller 62a moves, A part thereof enters and leaves the cylinder chamber 71.

  Thereby, the cylinder chamber 71 is divided into the low pressure chamber 71a and the high pressure chamber 71b by the piston 62 (roller 62a and blade 62b) (divided into two spaces), and the low pressure chamber 71a and the high pressure chamber 71b are moved by the movement of the piston 62. The volume of the high pressure chamber 71b changes, and the refrigerant introduced into the low pressure chamber 71a from the refrigerant introduction flow path 72 is compressed in the high pressure chamber 71b. Then, the compressed refrigerant is discharged to the sealed space 26 through the muffler spaces 76 and 77.

  Here, when the piston 62 moves as described above, the piston 62 and the upper surface and the lower surface of the cylinder chamber 71 slide, and the temperature therebetween increases. Lubricating oil flows between them, and the temperature rise is suppressed by circulating the lubricating oil, and seizure is prevented from occurring between them.

  However, since the moving amount of the blade 62b when the piston 62 moves as described above is smaller than the moving amount of the roller 62a, the lubricating oil on the upper surface and the lower surface of the blade 62b does not circulate sufficiently. Therefore, unlike the present embodiment, if the recess 62d is not formed on the side surface of the blade 62b, the temperature rise due to the sliding between the blade 62b and the upper surface and the lower surface of the cylinder chamber 71 may be sufficient depending on the lubricating oil. It is not suppressed, and as a result, there is a possibility that baking will occur between the two. In addition, this temperature rise becomes larger toward the center of the blade 62b.

  On the other hand, in the present embodiment, since the concave portion 62d is formed on the right side surface of the blade 62b in FIG. 2, the refrigerant introduced into the low pressure chamber 71a from the refrigerant introduction flow path 72 enters the concave portion 62d. By flowing in, the blade 62b is efficiently cooled to the center thereof. Thereby, the temperature rise mentioned above is suppressed and baking between the braid | blade 62b and the upper surface and lower surface of the cylinder chamber 71 can be prevented.

  Further, in the present embodiment, the recess 62d is formed only at the upper end and the lower end of the side surface of the blade 62b. However, unlike this, the recess extends on the side surface of the blade 62b in the entire vertical direction. If there is, there is a possibility that the recess is caught by the bush 73 and the piston 62 is prevented from moving smoothly.

  On the other hand, in the present embodiment, the recess 62d is formed only at the upper end and the lower end of the side surface of the blade 62b, and is not formed at the center of the side surface of the blade 62b. When moving as described above, the blade 62b slides in a state where the central portion of the blade 62b is in contact with the bush 73, so that the piston 62 moves smoothly without the recess 62d being caught by the bush 73. Thus, the concave portion 62d is prevented from being caught by the bush 73 and the smooth movement of the piston 62 is prevented.

  And since the recessed part 62d is formed in the upper end part and lower end part of the braid | blade 62b, the upper-lower-end surface of the braid | blade 62b is cooled effectively with the refrigerant | coolant introduced into the low pressure chamber 71a from the refrigerant | coolant introduction flow path 72.

  The recess 62d described above is a portion positioned in the bushing arrangement space 75a of the blade 62b in a state where the roller 62a is closest to the blade storage chamber 75 as shown in FIG. In addition, as shown in FIG. 2C, the roller 62a is formed only in a portion located inside the cylinder chamber 71 of the blade 62b in a state where the roller 62a is located farthest from the blade housing chamber 75.

  Here, unlike the present embodiment, when the recess 62d is formed in a portion located in the bush back space 75b in the state shown in FIG. The lubricating oil heated by the refrigerant has leaked into the low pressure chamber 71a (space on the refrigerant introduction flow path 72 side) through the recess 62d, and the temperature of the refrigerant in the low pressure chamber 71a rises. The compression efficiency of the refrigerant in the mechanism 13 is reduced.

  However, in the present embodiment, since the recess 62d is formed only in the portion located in the bushing arrangement space 75a in the state shown in FIG. 2A, in the process of moving the piston 62, The recess 62d is not positioned in the bush back space 75b. Therefore, it is difficult for the high-temperature lubricating oil to flow in as described above, and the compression efficiency of the refrigerant in the compression mechanism 13 can be prevented from decreasing.

  On the other hand, in a state where the blade 62b is located inside the cylinder chamber 71, a rightward force in FIG. 2 is applied to the blade 62b due to a pressure difference between the low pressure chamber 71a and the high pressure chamber 71b. This force is received by the portion in contact with the bush 73. In the state shown in FIG. 2C, the blade 62b has entered the cylinder chamber 71 the most, and therefore the force applied to the blade 62b is the largest. Therefore, unlike the present embodiment, when the recess 62d is formed in a portion located in the bush placement space 75a in the state shown in FIG. 2C, the contact area between the blade 62b and the bush 73 ( There is a possibility that a large pressure is applied to the bush 63 because the area for receiving the force becomes small.

  In contrast, in the present embodiment, the recess 62d is formed only in the portion of the blade 62b located in the cylinder chamber 71 in the state shown in FIG. A sufficient contact area with 73 can be ensured, and a large pressure can be prevented from being applied to the blade 62b.

  As described above, in the compressor 1 according to the present invention, the moving amount of the blade 62b is smaller than that of the roller 62a, and the lubricating oil between the blade 62b and the upper surface and the lower surface of the cylinder chamber 71 is lubricated. However, it is difficult to cool the heat generated by sliding between the blade 62b and the upper and lower surfaces of the cylinder chamber 71 due to the lubricating oil. However, since the recess 62d is formed on the side surface of the blade 62b on the low-pressure chamber 71a side, the refrigerant is introduced. The refrigerant introduced into the low pressure chamber 71a from the flow path 72 flows into the recess 62d, and the blade 62b is cooled by this refrigerant. Therefore, seizure between the blade 62b and the upper surface and the lower surface of the cylinder chamber 71 is prevented from occurring.

  When the roller 62a is located farthest from the blade storage chamber 75 and the blade 62b is the largest in the cylinder chamber 71, the blade 62b has the largest pressure difference due to the pressure difference between the low pressure chamber 71a and the high pressure chamber 71b. Although the force is applied, since the recess 62d is formed only in the portion located in the cylinder chamber 71 in this state, the contact area between the blade 62b and the bush 73 (the area for receiving the force) is reduced by the recess 62d. It does not become small, and a large pressure is prevented from being applied to the blade 62b.

  Further, the recess 62d is formed only in a portion where the roller 62a is located closest to the blade storage chamber 75 and the blade 62b is the largest and enters the blade storage chamber 75 and is located in the bushing arrangement space 75a. Therefore, the concave portion 62d does not enter the bush back space 75b, and the lubricating oil on the high pressure chamber 71b side whose temperature has been increased by being compressed in the high pressure chamber 71b passes through the concave portion 62d on the low pressure chamber 71a side. Will not flow into. Therefore, the lubricating oil does not easily flow and the lubricating oil does not easily heat the refrigerant in the low pressure chamber 71a. Thereby, it is prevented that the compression efficiency of the refrigerant | coolant in the compressor 1 falls.

  As mentioned above, although embodiment of this invention was described based on drawing, specific structure is not restricted to these embodiment, It can change in the range which does not deviate from the summary of invention.

  In the above-described embodiment, the recesses 62d are formed in the upper end portion and the lower end portion of the side surface of the blade 62b on the low pressure chamber 71a side (refrigerant introduction flow path 72 side), but this is not restrictive. In one modified example, as shown in FIG. 4, no recess is formed on the upper end of the side surface of the blade 62b corresponding to the upper cylinder chamber 61 on the low pressure chamber 71a side, and a recess 62d is formed only on the lower end. (Modification 1). On the side surface of the blade 62b in the lower cylinder chamber 71 on the low pressure chamber 71a side, recessed portions 62d are formed in the upper end portion and the lower end portion, respectively, as in the above-described embodiment.

  In the compression mechanism 13, as described above, the front head 63 is manufactured by casting, and the middle plate 64 and the rear head 65 are manufactured by sintering. The hardness of the middle plate 64 and the rear head 65 is determined by the front head. It is higher than 63. Therefore, when the piston 62 moves and the piston 62 and the upper surface and the lower surface of the cylinder chamber 71 slide, the lower surface of the upper cylinder chamber 71 formed by the upper piston 62 and the middle plate 64, and The upper and lower surfaces of the lower cylinder chamber 71 formed by the lower piston 62, the middle plate 64, and the rear head 65 are more than the upper surfaces of the upper cylinder chamber 71 formed by the upper piston 62 and the front head 63. The surface is not easily leveled, and the temperature rises easily due to sliding.

  Accordingly, the recess 62d is formed at the lower end of the side surface of the upper blade 62b on the low pressure chamber 71a side, and the recess 62d is formed at the upper end and lower end of the side surface of the lower blade 62b on the low pressure chamber 71a side. The refrigerant introduced into the low-pressure chamber 71a flows into the recess 62d, and the temperature rise in the portion where heat generation is likely to occur in the blade 62b can be reduced.

  In another modification, as shown in FIG. 5, a recess 62e extending over the entire area in the vertical direction is formed on the side surface of the blade 62b on the low pressure chamber 71a side (Modification 2). In this case, as described above, the recess 62e may be caught by the bush 73 and the smooth movement of the piston 62 may be hindered, but the recess 62e is a combination of the two recesses 62d of the above-described embodiment. Since the refrigerant flows into the recess 62e, heat generation due to sliding between the blade 62b and the upper and lower surfaces of the cylinder chamber 71 can be effectively suppressed.

  In the above-described embodiment, the recess 62d is located in the bush placement space 75a in the state of FIG. 2A in the blade 62b, and is in the position of FIG. 2C. However, the present invention is not limited to this, but the roller 62a in the blade 62b is located closest to the blade storage chamber 75 as shown in FIG. A recess 62f may be formed in a portion located in the bush back space 75b in the state (Modification 3). Alternatively, as shown in FIG. 7, in the blade 62b, a recess 62g may be formed in a portion located in the bush placement space 75a in a state where the roller 62a is located farthest from the blade storage chamber 75 (deformation). Example 4).

  In the above-described embodiment, the roller 62a and the blade 62b are integrated, but the present invention is not limited to this. In another modification, as shown in FIG. 8, the roller 81 and the blade 82 are separated. The roller 81 has the same configuration as the roller 62a (see FIG. 2) in the embodiment except that it is not integrated with the blade 82, and is shown in FIGS. 8 (a) to 8 (d). As described above, the shaft 60 rotates and moves along the inner peripheral surface of the cylinder chamber 71 while contacting the inner peripheral surface of the cylinder chamber 71.

  The blade 82 extends in the vertical direction, and its lower end is in contact with the roller 81, and its upper end is pressed downward in the figure by a spring 84 provided in the blade storage chamber 83. Then, as shown in FIGS. 8A to 8D, the blade 82 moves up and down with the movement of the roller 81 to enter and exit the cylinder chamber 71 and the blade storage chamber 83. Further, a recess 82a is formed on the right side surface of the blade 82 (the side surface on the side of the refrigerant introduction channel 72) (Modification 5).

  Even in this case, similarly to the above-described embodiment, the refrigerant introduced into the low pressure chamber 71a from the refrigerant introduction flow path 72 flows into the recess 82a, so that the upper surface of the blade 82 and the upper surface and lower surface of the cylinder chamber 71 slide. It is possible to suppress heat generation due to, and to prevent baking between the two.

  Also in this case, as shown in FIG. 8C, the cylinder 81 of the blade 82 is in a state where the roller 81 is in the position farthest from the blade storage chamber 83 and the blade 82 enters the cylinder chamber 71 most. Since the concave portion 82a is formed only in the portion located in 71, the contact area between the blade 82 receiving the force generated by the pressure difference between the low pressure chamber 71a and the high pressure chamber 71b and the wall surface of the blade storage chamber 83 Is sufficiently secured.

  According to the present invention, since the concave portion is formed on the side surface of the blade on the refrigerant introduction flow path side, the refrigerant introduced from the refrigerant introduction flow channel flows into the concave portion, and the blade is cooled by this refrigerant. It is possible to prevent seizure from occurring between the upper surface and the lower surface of the cylinder chamber.

It is a schematic block diagram of the compressor which concerns on embodiment in this invention. It is a top view which shows the structure of the cylinder and piston of FIG. 1, and these operation | movement. It is the III-III sectional view taken on the line of FIG. FIG. 10 is a diagram corresponding to FIG. FIG. 10 is a diagram corresponding to FIG. FIG. 9 is a diagram corresponding to FIG. FIG. 10 is a diagram corresponding to FIG. FIG. 10 is a diagram corresponding to FIG.

Explanation of symbols

1 Compressor 26 Sealed space 61 Cylinder 62a Roller 62b Blade 62d Recess 62e Recess 62f Recess 62g Recess 63 Front head 64 Middle plate 71 Cylinder chamber 72 Refrigerant introduction channel 75 Blade storage chamber 75a Bushing space 75b Bush back space 81 Roller 82 Blade 82a Recess 83 Blade storage chamber

Claims (5)

A cylinder chamber (71) for compressing the refrigerant and a blade storage extending from the inner peripheral surface of the cylinder chamber (71) toward the outside of the cylinder chamber (71), which is disposed in the sealed space (26). A cylinder (61) having a chamber (75, 83) and a refrigerant introduction channel (72) for introducing a refrigerant into the cylinder chamber (71);
Rollers (62a, 81) disposed inside the cylinder chamber (71) and moving along the inner peripheral surface of the cylinder chamber (71);
The roller (62a, 81) is disposed in the blade storage chamber (75, 83), and a part of the roller (62a, 81) moves into and out of the cylinder chamber (71) as the roller (62a, 81) moves. And a blade (62b, 82) for dividing the cylinder chamber (71) into the two spaces (71a, 71b),
The compressor (1) is characterized in that recesses (62d, 62e, 62f, 62g, 82a) are formed on a side surface of the blade (62b, 82) on the refrigerant introduction flow path (72) side.   The recesses (62d, 62e, 82a) are formed on the side surfaces of the blades (62b, 82) on the refrigerant introduction flow path (72) side so that the rollers (62a, 81) are separated from the blade storage chambers (75, 83). 2. The compressor (1) according to claim 1, wherein the compressor (1) is formed only in a portion located in the cylinder chamber (71) in a state of being the farthest away. The blade storage chamber (75)
A bush arrangement space (75a) in communication with the cylinder chamber (71) and having a bush (73) slidably sandwiching the blade (62b) therein;
A bush back space (75b) communicating with the bush arrangement space (75a) on the opposite side of the cylinder chamber (71);
The recesses (62d, 62e) are formed on the side surface of the blade (62b) on the refrigerant introduction flow path (72) side in a state where the roller (62a) is closest to the blade storage chamber (75). The compressor (1) according to claim 1 or 2, wherein the compressor (1) is formed only in a portion located in the bush arrangement space (75a).   The said recessed part (62d) is formed in at least any one of the upper end part in the side surface by the side of the said refrigerant | coolant introduction flow path (72) of the said blade (62b), and a lower end part, The Claim 3 characterized by the above-mentioned. Compressor (1). An upper partition member (63) defining an upper surface of the cylinder chamber (71);
A lower partition wall member (64) defining a lower surface of the cylinder chamber (71),
The upper partition member (63) and the lower partition member (64) are made of materials having different hardnesses,
The recess (62d) has at least the upper partition member (63) and the lower partition member (64) among the upper end portion and the lower end portion on the side surface of the blade (62b) on the refrigerant introduction flow path (72) side. The compressor (1) according to any one of claims 1 to 4, wherein the compressor (1) is formed on a side having a higher hardness.

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