JP2009162176A - Compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compressor capable of forming a heat insulation structure for reducing heat transmission to a coolant gas in an intake chamber while preventing detachment of a heat insulation member, preventing mis-assembly, and reducing a number of parts. <P>SOLUTION: In this compressor, a rear housing 14 is coupled with a cylinder block 11 via a valve-port organizer 13, an intake chamber 26 opened toward the valve-port organizer 13 is blocked in the rear housing 14, and an intake chamber heat-insulation member 40 covering an inner wall 14c of the rear housing 14 is provided in the intake chamber 26. The intake chamber heat-insulation member 40 is integrally provided with a detachment-prevention spring piece 53 for preventing the intake chamber heat-insulation member 40 from being detached from the intake chamber 26, and a pressure-contact spring piece 54 for pressing the intake chamber heat-insulation member 40 against the valve-port organizer 13. Also, the detachment-prevention spring piece 53 is exposed to the outside of the intake chamber 26 from between the rear housing 14 and the intake chamber heat-insulation member 40. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a compressor in which a heat insulating member that covers an inner wall surface of a cover housing is provided in a suction chamber.

  The temperature of the refrigerant gas sucked into the compression chamber from the suction chamber in the compressor affects the performance of the compressor. That is, when the refrigerant gas in the suction chamber is heated, the refrigerant gas before being sucked into the compression chamber is heated and expanded, and the density of the refrigerant gas is reduced. As a result, the substantial amount of refrigerant gas sucked into the compression chamber decreases, and as a result, the operating efficiency of the compressor decreases. For this reason, the compressor provided with the heat insulation structure for suppressing that the refrigerant | coolant gas in a suction chamber is heated is proposed (for example, refer patent document 1). In the compressor disclosed in Patent Document 1, in the cover housing, the inner wall surface forming the suction chamber is covered with a heat insulating member. A disc spring is interposed between the inner wall surface of the cover housing and the heat insulating member, and the heat insulating member is pressed against the valve plate by the disc spring.

And according to the compressor of patent documents 1, even if the discharge chamber etc. in which compressed refrigerant gas exists become high temperature, and the temperature of a cover housing rises, with the heat insulation member which covers the inner wall surface of a suction chamber, Heat transfer from the cover housing to the refrigerant gas in the suction chamber is reduced, and heating of the refrigerant gas in the suction chamber is suppressed. Further, since the heat insulating member is pressed against the valve plate by the disc spring, the refrigerant gas is suppressed from flowing between the heat insulating member and the inner wall surface of the cover housing. Then, the amount of heat directly transmitted from the cover housing to the refrigerant gas is reduced, the heat insulation efficiency in the suction chamber in the compressor is increased, and the heating of the refrigerant gas in the suction chamber is suppressed.
JP 2005-147020 A

  By the way, in patent document 1, in order to press a heat insulation member against a valve plate, a plurality of disc springs are used. However, the heat insulating member is only loosely inserted in the suction chamber of the cover housing, and the plurality of disc springs are merely interposed between the heat insulating member and the cover housing. For this reason, depending on the orientation of the cover housing when the compressor is assembled, the heat insulating member and the disc spring fall off from the cover housing, so that the method of assembling the compressor is limited to prevent the fall off. . Further, since the disc spring needs to press the heat insulating member from the bottom side and press it against the valve plate, the disc spring is disposed on the back side of the heat insulating member. For this reason, in a state where the heat insulating member is assembled to the cover housing, only the heat insulating member can be visually recognized, and even if erroneous assembly such as forgetting to install the disc spring or stacking two disc springs is not noticed. Further, in order to press the heat insulating member against the valve plate in a balanced manner, a plurality of disc springs are required, and a plurality of parts are required to form the heat insulating structure.

  The present invention provides a compressor capable of forming a heat insulating structure for reducing heat transfer to refrigerant gas in a suction chamber while preventing the heat insulating member from falling off, preventing erroneous assembly, and reducing the number of components. Is to provide.

  In order to solve the above problems, in the invention according to claim 1, a cover housing is joined to the cylinder block via a valve / port forming body, and the cover housing opens toward the valve / port forming body. A compressor in which a suction chamber is defined and a heat insulating member that covers an inner wall surface of the cover housing is provided in the suction chamber, and the drop prevention portion prevents the heat insulating member from falling out of the suction chamber. And a pressing portion for pressing the heat insulating member toward the valve / port forming body is provided integrally with the heat insulating member, and the drop preventing portion is sucked from the space between the cover housing and the heat insulating member. It is exposed outside the room.

  According to this invention, the inner wall surface of the cover housing is covered with the heat insulating member, and the heat insulating member reduces heat transfer from the cover housing to the refrigerant gas in the suction chamber. As a result, the refrigerant gas in the suction chamber is suppressed from being heated, and the substantial intake amount of the refrigerant gas used for compression is suppressed from being reduced, resulting in a decrease in operating efficiency of the compressor. Can be prevented. Further, since the heat insulation member is prevented from falling out of the suction chamber by the drop-off preventing portion, even if the rear housing is turned over when the compressor is assembled, the heat insulation member is prevented from dropping from the rear housing. Is done. Moreover, in a state where the heat insulating member is accommodated in the suction chamber, the drop-off preventing portion can be visually recognized from between the heat insulating member and the cover housing. Therefore, when the compressor is assembled, it is possible to confirm that the heat insulating member is attached in the suction chamber by using the drop-off prevention part by visual recognition of the drop-off prevention part. Further, since the heat-insulating member is integrally provided with the drop-off prevention part and the pressing part, when the cover housing is joined to the cylinder block by visual recognition of the drop-off prevention part, the heat-insulating member is valved by the pressing part. -It can also be confirmed that it can be pressed toward the port forming body. Furthermore, since the pressing portion is integrally provided on the heat insulating member, the number of parts can be reduced compared to the background technology that requires a plurality of disc springs in order to press the heat insulating member against the valve / port forming body. Can be reduced.

  Further, the drop-off prevention part is formed to be elastically deformable, and is pressed against the inner wall surface of the cover housing to prevent the heat insulating member from falling out of the suction chamber, and the pressing part is formed to be elastically deformable. In addition, the heat insulating member may be pressed against the valve / port forming body by pressing against the inner wall surface of the cover housing.

  According to this, the drop-off prevention part prevents the heat insulation member from dropping out of the suction chamber only by its own elastic deformation, and the pressing part pushes the heat insulation member against the valve / port formation body only by its own elastic deformation. Can be made. Therefore, there is no need to separately provide a structure for preventing the heat-insulating member from falling off and for pressing against the valve / port forming body, and the heat-insulating structure in the compressor can be easily manufactured.

Moreover, the said heat insulation member may attach the attachment member made from a metal material integrally provided with the said drop-off prevention part and the said pressing part to the heat insulation material made from a synthetic resin material.
According to this, the amount of elastic deformation of the drop-off prevention part and the pressing part can be increased as compared with the case where the drop-off prevention part and the pressing part are formed of synthetic resin. Therefore, it is possible to reliably prevent the heat-insulating member from falling out of the suction chamber by elastic deformation of the drop-off preventing portion, and to strongly press the heat-insulating member against the valve / port forming body by elastic deformation of the pressing portion.

  Further, the mounting member may be integrally provided with a ring-shaped main body portion, a drop-off prevention spring piece made of a leaf spring as the drop-off prevention portion, and a pressing spring piece made of a plate spring as the pressing portion. .

According to this, the structure for preventing the thermal insulation member from falling off from the cover housing and the structure for pressing the thermal insulation member against the valve / port forming body can be easily formed.
Moreover, the said attachment member may be provided with the assembly | attachment part which assembles | attaches an attachment member and a heat insulating material integrally, preventing the drop-off | omission of the said heat insulating material from this attachment member.

According to this, it is possible to prevent the heat insulating material from falling off from the mounting member.
Further, the heat insulating member may be made of a synthetic resin material having elasticity as a whole, and the drop prevention portion and the pressing portion may be integrally formed. According to this, the structure for preventing the heat-insulating member from falling off from the suction chamber (drop-off preventing part) and the structure for pressing the heat-insulating member against the valve / port forming body (pressing part) are provided. Can be easily formed.

  The cover housing has a discharge chamber defined by a partition wall on an outer peripheral side or an inner peripheral side of the suction chamber, and the discharge chamber opens toward the valve / port forming body. A heat insulating member that covers the inner wall surface of the cover housing may be provided.

  According to this, the heat insulating member reduces heat transfer from the refrigerant gas in the discharge chamber to the cover housing via the partition wall. Reduction of heat transfer from the refrigerant gas in the discharge chamber to the cover housing leads to suppression of heat transfer from the cover housing to the refrigerant gas in the suction chamber.

  According to the present invention, the heat insulating structure for reducing the heat transfer to the refrigerant gas in the suction chamber can be formed while preventing the heat insulating member from falling off, preventing incorrect assembly, and reducing the number of parts. .

(First embodiment)
A first embodiment in which the present invention is embodied in a variable displacement piston compressor (hereinafter simply referred to as a compressor) will be described below with reference to FIGS. In the following description, the “front” and “rear” of the compressor have the direction of the arrow Y1 shown in FIG.

  As shown in FIG. 1, the housing of the compressor 10 includes a cylinder block 11, a front housing 12 joined to the front end of the cylinder block 11, and a valve / port forming body 13 joined to the rear end of the cylinder block 11. And a rear housing 14 as a cover housing. The cylinder block 11, the front housing 12, and the rear housing 14 are each made of aluminum having a high thermal conductivity, and are fastened together by a plurality of through bolts B. The rear housing 14 is formed with a plurality of nut portions 14a into which the through bolts B are screwed (see FIG. 2).

  In the housing, a crank chamber 15 is defined between the cylinder block 11 and the front housing 12, and rotates between the cylinder block 11 and the front housing 12 so as to pass through the crank chamber 15. The shaft 16 is rotatably supported. The rotary shaft 16 has a front side rotatably supported by a radial bearing 20 and a rear side rotatably supported by a radial bearing 21. An engine E of a vehicle, which is an external drive source, is operatively connected to the rotating shaft 16 via a power transmission mechanism (not shown) formed of a clutchless mechanism. When the engine E is in operation, the rotating shaft 16 is always rotated by obtaining a rotational driving force from the engine E.

  In the crank chamber 15, a rotor 17 is fixed to the rotary shaft 16 so as to be integrally rotatable, and a swash plate 18 having a substantially disk shape is accommodated. A rotation shaft 16 is inserted through the center of the swash plate 18, and the swash plate 18 is supported on the rotation shaft 16 so as to be capable of rotating integrally and tilting. A hinge mechanism 19 is interposed between the rotor 17 and the swash plate 18, and the rotational force of the rotor 17 is transmitted to the swash plate 18 via the hinge mechanism 19.

  In the cylinder block 11, a plurality of cylinder bores 22 are formed through the rotating shaft 16 in the front-rear direction at equal angular intervals, and pistons 23 are accommodated in the respective cylinder bores 22 so as to be movable in the front-rear direction. Yes. The front and rear openings of the cylinder bores 22 are closed by the front end face of the valve / port forming body 13 and the pistons 23, and the compression chambers 24 whose volumes change in accordance with the movement of the pistons 23 in the front-rear direction are respectively provided in the cylinder bores 22. It is partitioned. Each piston 23 is anchored to the outer periphery of the swash plate 18 via a pair of shoes 25. Therefore, when the swash plate 18 is rotated by the rotation of the rotating shaft 16, the piston 23 is reciprocated linearly in the front-rear direction by the swing of the swash plate 18.

  In the rear housing 14, a suction chamber 26 and a discharge chamber 27 that open toward the front end surface (end surface on the cylinder block 11 side) of the rear housing 14 are defined by an annular partition wall 141. That is, as shown in FIG. 2, the discharge chamber 27 is formed on the inner peripheral side of the suction chamber 26 via the partition wall 141, and the discharge chamber 27 is surrounded by the suction chamber 26 around the axis of the rotating shaft 16. .

  The inner wall surface 14c of the rear housing 14 that defines the suction chamber 26 is formed in an uneven shape along the circumferential direction of the suction chamber 26 due to the presence of the plurality of nut portions 14a. Further, in the rear housing 14, an accommodation recess 14 b is formed between the adjacent nut portions 14 a so as to be recessed toward the outer peripheral surface of the rear housing 14. In addition, both the inner and outer peripheral surfaces of the partition wall 141, which is the inner wall surface 14c of the rear housing 14, are formed in an uneven shape. In the rear housing 14, a plurality of housing recesses 141 b are formed in the partition wall 141 so as to be recessed toward the outer peripheral surface of the partition wall 141.

  As shown in FIG. 1, in the discharge chamber 27, a retainer 34 is coupled to the valve / port forming body 13 by tightening screws 39. The valve / port forming body 13 is formed with a suction port 28 and a suction valve 29 so as to be positioned between the compression chamber 24 and the suction chamber 26. A discharge port 30 and a discharge valve 31 are formed in the valve / port forming body 13 so as to be positioned between the compression chamber 24 and the discharge chamber 27.

  The compressor 10 having the above configuration constitutes a refrigerant circulation circuit (refrigeration cycle) of the vehicle air conditioner together with the external refrigerant circuit 35. The external refrigerant circuit 35 includes, for example, a gas cooler 37, an expansion valve 38, and an evaporator 36. In the housing of the compressor 10, an extraction passage 32, an air supply passage 33, and a control valve CV1 are provided. The extraction passage 32 connects the crank chamber 15 and the suction chamber 26, and the supply passage 33 connects the discharge chamber 27 and the crank chamber 15. A control valve CV <b> 1 is disposed in the middle of the air supply passage 33. Then, by adjusting the opening of the air supply passage 33 by adjusting the valve opening of the control valve CV1, the amount of high-pressure discharge gas introduced from the discharge chamber 27 to the crank chamber 15 via the air supply passage 33, and The balance with the amount of gas discharged from the crank chamber 15 to the suction chamber 26 via the extraction passage 32 is controlled, and the pressure in the crank chamber 15 is determined. The difference between the pressure in the crank chamber 15 and the pressure in the compression chamber 24 is changed in accordance with the change in the pressure in the crank chamber 15, and the inclination angle of the swash plate 18 is changed. The discharge capacity is adjusted.

  For example, when the valve opening of the control valve CV1 decreases and the opening of the air supply passage 33 decreases, the pressure in the crank chamber 15 decreases. Therefore, the inclination angle of the swash plate 18 increases, the stroke of the piston 23 increases, and the discharge capacity of the compressor 10 increases. Conversely, when the valve opening of the control valve CV1 increases and the opening of the air supply passage 33 increases, the pressure in the crank chamber 15 increases. Therefore, the inclination angle of the swash plate 18 decreases, the stroke of the piston 23 decreases, and the discharge capacity of the compressor 10 decreases.

Next, the heat insulation structure in the compressor 10 will be described in detail.
As shown in FIGS. 1 and 2, a suction chamber heat insulation member 40 is accommodated in the suction chamber 26, and a discharge chamber heat insulation member 60 is accommodated in the discharge chamber 27.

  First, the suction chamber heat insulating member 40 will be described. The suction chamber heat insulating member 40 includes a suction chamber heat insulating material 41 made of a synthetic resin material having a low thermal conductivity, and a suction chamber mounting member 51 made of a metal material integrally assembled with the suction chamber heat insulating material 41. Become. The suction chamber heat insulating material 41 is formed in an annular shape that can be inserted into the suction chamber 26, and the suction chamber heat insulating material 41 has a suction space S <b> 1 extending along the circumferential direction of the suction chamber heat insulating material 41. It is recessed from the front end face 41a (end face on the valve / port forming body 13 side).

  As shown in FIG. 2, a plurality of convex portions 42 are formed along the circumferential direction of the suction chamber heat insulating material 41 on the outer peripheral surface of the suction chamber heat insulating material 41, and a concave portion is formed between adjacent convex portions 42. 43 is formed. An engagement step portion 42a is formed on the front side of each convex portion 42 (on the valve / port forming body 13 side). Further, in a state where the suction chamber heat insulating member 40 is housed in the suction chamber 26, the nut portion 14 a of the rear housing 14 enters the recess 43 of the suction chamber heat insulating material 41. Further, as shown in FIG. 3, a positioning protrusion 44 for projecting the suction chamber mounting member 51 to the suction chamber heat insulating material 41 protrudes from the rear end surface 41 b of the suction chamber heat insulating material 41. Furthermore, a suction hole 45 communicating with the suction space S <b> 1 is formed in one of the plurality of convex portions 42 of the suction chamber heat insulating material 41.

  The suction chamber mounting member 51 has an annular main body 52. The main body 52 includes a drop-off prevention spring piece 53 as a drop-off prevention portion, a pressing spring piece 54 as a pressing portion, and an assembly portion. Assembling pieces 55 are integrally formed. The suction chamber mounting member 51 is provided with three drop-off prevention spring pieces 53 at regular intervals along the circumferential direction of the main body 52. As shown in FIG. 4A, the drop-off prevention spring piece 53 is formed of a plate spring extending from the main body portion 52, bends an elongated metal plate forming the suction chamber mounting member 51 into an arc shape, and has a distal end side thereof. It is formed by folding outward and can be elastically deformed.

  Further, as shown in FIG. 3, the suction chamber mounting member 51 is provided with three pressing spring pieces 54 at regular intervals along the circumferential direction of the main body 52. The pressing spring piece 54 is provided closer to the inner periphery of the main body 52 than the drop-off preventing spring piece 53. As shown in FIG. 4A, the pressing spring piece 54 is formed of a plate spring extending from the main body 52, and is formed by folding back an elongated metal plate that forms the suction chamber mounting member 51. Elastic deformation is possible.

  Further, as shown in FIG. 2, the attachment member 51 for the suction chamber is provided with three assembly pieces 55 at equal intervals along the circumferential direction of the main body portion 52, and each assembly piece 55 has a main body. In the circumferential direction of the portion 52, it is provided next to the drop-off preventing spring piece 53. As shown in FIG. 4 (b), the assembly piece 55 is made of a leaf spring, and is formed by bending an elongated metal plate forming the suction chamber mounting member 51 into an arc shape and further bending the distal end side inward. Deformable. Further, a positioning hole 52 a into which the positioning projection 44 of the suction chamber heat insulating material 41 can be inserted is formed in the part of the main body 52 where one assembly piece 55 is formed.

  As shown in FIGS. 2 and 3, a suction chamber heat insulating member 40 is formed by assembling a suction chamber mounting member 51 to the suction chamber heat insulating material 41. An assembly piece 55 is engaged with each of the engaging step portions 42a of the three convex portions 42, and the engagement prevents the suction chamber heat insulating material 41 from falling off from the suction chamber mounting member 51. Further, the positioning projection 44 of the heat insulating material 41 for the suction chamber is inserted into the positioning hole 52a of the suction chamber mounting member 51 to prevent the suction chamber mounting member 51 from rotating. In the suction chamber heat insulating member 40, the suction chamber mounting member 51 for the suction chamber heat insulating material 41 is provided so that the drop-off preventing spring piece 53 and the assembly piece 55 do not close the suction hole 45 of the suction chamber heat insulating material 41. The assembly position of is adjusted.

  As shown in FIG. 2, in a state where the suction chamber heat insulating member 40 is housed in the suction chamber 26, the convex portion 42 of the suction chamber heat insulating material 41 is housed in the housing concave portion 14 b of the rear housing 14. The nut portion 14a of the rear housing 14 is accommodated in the concave portion 43 of the suction chamber heat insulating material 41, and the rotation of the suction chamber heat insulating material 41 in the suction chamber 26 is restricted. The three drop-off prevention spring pieces 53 are housed in the housing recess 14b and elastically deformed so as to come into pressure contact with the inner wall surface 14c of the housing recess 14b, thereby preventing the suction chamber heat insulating member 40 from falling out of the suction chamber 26. It is preventing. In this drop-off prevention state, the inner wall surface 14c of the rear housing 14 forming the suction chamber 26 is covered with the heat insulating material 41 for the suction chamber.

  Further, as shown in FIG. 4A, the three pressing spring pieces 54 press against the inner wall surface 14c of the rear housing 14 and press the suction chamber heat insulating member 40 toward the valve / port forming body 13. Yes. Therefore, the front end face 41 a of the suction chamber heat insulating member 41 in the suction chamber heat insulating member 40 is pressed against the valve / port forming body 13. In this pressing state, a gap is not formed between the front end surface 41a of the heat insulating material 41 for the suction chamber and the valve / port forming body 13, and leakage of the refrigerant gas is prevented. Further, in a state where the suction chamber heat insulating member 40 is accommodated in the suction chamber 26, the drop-off prevention spring piece 53 and the assembly piece 55 are connected to the inner wall surface 14 c of the rear housing 14 and the outer peripheral surface of the suction chamber heat insulating material 41 ( It is exposed toward the outside of the suction chamber 26 from between the convex portion 42).

  Next, the discharge chamber heat insulating member 60 will be described. As shown in FIG. 1, the discharge chamber heat insulating member 60 includes a discharge chamber heat insulating material 71 made of a synthetic resin material having a low thermal conductivity, and a discharge made of a metal material integrally assembled with the discharge chamber heat insulating material 71. And a chamber mounting member 81. The discharge chamber heat insulating material 71 is formed in a cup shape that can be inserted into the discharge chamber 27, and the discharge chamber heat insulating material 71 includes a discharge space S <b> 2 at the front end surface 71 a (valve of the discharge chamber heat insulating material 71. -It is recessed from the port forming body 13 side end surface).

  As shown in FIG. 2, a plurality of convex portions 72 are formed on the outer peripheral surface of the discharge chamber heat insulating material 71 along the circumferential direction of the discharge chamber heat insulating material 71, and a recess is formed between adjacent convex portions 72. 73 is formed. An engaging stepped portion 72 a is formed on the front side (valve / port forming body 13 side) of each convex portion 72. Further, as shown in FIG. 5, a positioning protrusion 74 for positioning the discharge chamber mounting member 81 on the discharge chamber heat insulating material 71 projects from the rear end surface 71 b of the discharge chamber heat insulating material 71. Furthermore, a discharge hole 75 communicating with the discharge space S2 is formed in the central portion of the discharge chamber heat insulating material 71.

  The discharge chamber mounting member 81 has an annular main body 82, and the main body 82 is integrally provided with a drop-off preventing spring piece 83, a pressing spring piece 84, and an assembly piece 85. The discharge chamber mounting member 81 is provided with three drop-off prevention spring pieces 83 at regular intervals along the circumferential direction of the main body portion 82. As shown in FIG. 6A, the drop-off preventing spring piece 83 is formed of a plate spring extending from the main body portion 82, bends an elongated metal plate forming the discharge chamber mounting member 81 in an arc shape, and has a tip end side thereof. It is formed by folding outward and can be elastically deformed.

  As shown in FIG. 5, the discharge chamber mounting member 81 is provided with three pressing spring pieces 84 at equal intervals along the circumferential direction of the main body portion 82. The pressing spring piece 84 is provided closer to the inner periphery of the main body 82 than the drop-off preventing spring piece 83. As shown in FIG. 6A, the pressing spring piece 84 is made of a plate spring extending from the main body 82, and is formed by folding back an elongated metal plate forming the discharge chamber mounting member 81, and is elastically deformed. It is possible.

  As shown in FIG. 2, the assembly member 81 for the discharge chamber is provided with three assembly pieces 85 at equal intervals along the circumferential direction of the main body portion 82. It is provided next to the drop-off prevention spring piece 83 in the circumferential direction. Further, as shown in FIG. 6B, a positioning hole 82a into which the positioning projection 74 of the discharge chamber heat insulating material 71 can be inserted is formed in a portion of the main body 82 where the one assembly piece 85 is formed. Has been. The assembly piece 85 is made of a plate spring, and is formed by bending an elongated metal plate forming the discharge chamber attachment member 81 into an arc shape and further bending the distal end side inward, so that it can be elastically deformed.

  As shown in FIG. 2, the discharge chamber heat insulating member 71 is assembled to the discharge chamber heat insulating member 71 to form a discharge chamber heat insulating member 60. An assembly piece 85 is engaged with each of the engaging step portions 72a of the three convex portions 72, and the engagement prevents the discharge chamber heat insulating material 71 from falling off from the discharge chamber mounting member 81. Further, as shown in FIG. 5, the positioning projection 74 of the discharge chamber heat insulating material 71 is inserted into the positioning hole 82 a of the discharge chamber mounting member 81 to prevent the discharge chamber mounting member 81 from rotating.

  As shown in FIG. 2, in a state where the discharge chamber heat insulating member 60 is housed in the discharge chamber 27, each of the plurality of convex portions 72 of the discharge chamber heat insulating material 71 is housed in the housing concave portion 141 b of the partition wall 141. Has been. The three drop-off prevention spring pieces 83 are housed in the housing recess 141b and are elastically deformed so as to come into pressure contact with the inner wall surface 14c of the housing recess 141b, thereby preventing the discharge chamber heat insulating member 60 from falling out of the discharge chamber 27. It is preventing. In this drop-off prevention state, the inner wall surface 14c (the inner surface of the discharge chamber 27) is covered with the discharge chamber heat insulating material 71.

  Further, as shown in FIG. 6A, the three pressing spring pieces 84 are pressed against the inner wall surface 14c of the partition wall 141 and press the discharge chamber heat insulating member 60 toward the valve / port forming body 13. ing. Therefore, the front end surface 71 a of the discharge chamber heat insulating material 71 in the discharge chamber heat insulating member 60 is pressed against the valve / port forming body 13. In this pressing state, no gap is formed between the front end surface 71a of the discharge chamber heat insulating material 71 and the valve / port forming body 13, and leakage of the refrigerant gas is prevented. In a state where the discharge chamber heat insulating member 60 is accommodated in the discharge chamber 27 and positioned, the drop-off prevention spring piece 83 and the assembly piece 85 are arranged on the inner wall surface 14c of the partition wall 141 and the outer periphery of the discharge chamber heat insulating material 71. It is exposed to the outside of the discharge chamber 27 from between the surfaces.

  In the compressor 10, the refrigerant gas introduced from the evaporator 36 side into the suction space S1 of the suction chamber 26 through the suction passage 61 and the suction hole 45 of the compressor 10 is the top dead center position of each piston 23. Is moved into the compression chamber 24 through the suction port 28 and the suction valve 29 by the movement from the bottom dead center position to the bottom dead center position. The refrigerant gas sucked into the compression chamber 24 is compressed to a predetermined pressure by the movement from the bottom dead center position to the top dead center position side of the piston 23, and is discharged to the discharge chamber 27 via the discharge port 30 and the discharge valve 31. It is discharged into the discharge space S2. The refrigerant gas discharged into the discharge chamber 27 is led out to the gas cooler 37 side of the external refrigerant circuit 35 through the discharge hole 75 and the discharge passage 62, cooled by the gas cooler 37, decompressed by the expansion valve 38, and evaporated. Sent to the vessel 36 for evaporation in the evaporator 36.

According to the above embodiment, the following effects can be obtained.
(1) With the operation of the compressor 10, the inside of the discharge chamber 27 and the inside of the discharge passage 62 where the compressed refrigerant gas exists becomes high temperature, and the temperature of the rear housing 14 rises. The inner wall surface 14 c of the rear housing 14 that defines the suction chamber 26 is covered with a suction chamber heat insulating material 41 of the suction chamber heat insulating member 40. The suction chamber heat insulating material 41 reduces heat transfer from the aluminum rear housing 14 having a high thermal conductivity to the refrigerant gas in the suction chamber 26 and the suction passage 61. As a result, the refrigerant gas in the suction chamber 26 is suppressed from being heated, and the substantial amount of refrigerant gas sucked into the compression chamber 24 is prevented from being reduced. As a result, the operating efficiency of the compressor 10 is reduced. This can be prevented.

  (2) In the compressor 10, the suction chamber heat insulating material 41 is prevented from falling out of the suction chamber 26 by the drop-off preventing spring piece 53 provided in the suction chamber mounting member 51. For this reason, even when the rear housing 14 is turned over when the compressor 10 is assembled, the suction chamber heat insulating member 40 is prevented from falling off the rear housing 14. Therefore, it is not necessary to consider the assembly method in order to prevent the suction chamber heat insulating member 40 from falling off the rear housing 14 when the compressor 10 is assembled, and the productivity of the compressor 10 can be improved.

  (3) The drop-off prevention spring piece 53 and the assembly piece 55 are exposed to the outside of the suction chamber 26 from between the outer peripheral surface of the suction chamber heat insulating material 41 and the inner wall surface 14c of the rear housing 14. Therefore, when the compressor 10 is assembled, the suction chamber heat-insulating member 40 is assembled to the rear housing 14 in a state in which the suction chamber heat-insulating member 40 is prevented from falling off by the fall-off prevention spring piece 53 by visually checking the fall-off prevention spring piece 53 and the assembly piece 55. Can be confirmed. In addition, since the suction chamber heat insulating member 40 is integrally provided with a pressing spring piece 54 in addition to the drop-off prevention spring piece 53, the rear housing 14 is joined to the cylinder block 11 by visual recognition of the drop-off prevention spring piece 53. In some cases, it can be confirmed that the suction chamber heat insulating member 40 can be pressed against the valve / port forming body 13 by the pressing spring piece 54. Therefore, misassembly such as forgetting to assemble the suction chamber mounting member 51 for pressing the suction chamber heat insulating member 40 against the valve / port forming body 13 or overlapping two suction chamber mounting members 51 occurs. Can be prevented.

  (4) The suction chamber mounting member 51 is integrally provided with three pressing spring pieces 54. The three pressing spring pieces 54 are provided at equal intervals in the circumferential direction of the main body 52. Accordingly, the suction chamber heat insulating material 41 can be pressed against the valve / port forming body 13 in a balanced manner by the three pressing spring pieces 54. As a result, the number of parts can be reduced as compared with the background art that requires a plurality of disc springs in order to press the suction chamber insulating material 41 against the valve / port forming body 13 in a balanced manner.

  (5) The drop-off preventing spring piece 53 prevents the suction chamber heat-insulating member 40 from falling out of the suction chamber 26 only by pressure contact with the inner wall surface 14c due to its own elastic deformation, and the pressing spring piece 54 has its own elasticity. The heat insulating material 41 for the suction chamber can be pressed against the valve / port forming body 13 only by deformation. Therefore, there is no need to separately provide a structure for preventing the suction chamber heat insulating member 40 from falling off and pressing the valve / port forming body 13 on the rear housing 14 side, and the heat insulating structure in the compressor 10 can be easily manufactured. Can do.

  (6) The suction chamber heat insulating member 40 is formed by attaching a suction chamber mounting member 51 to a suction chamber heat insulating material 41 made of a synthetic resin material. For this reason, the suction chamber mounting member 51 can be made of a metal material, and the spring pieces 53 and 54 are more elastic than the case in which the drop-off prevention spring piece 53 and the pressing spring piece 54 are made of synthetic resin. The amount of deformation can be increased. Therefore, the elastic deformation of the drop-off prevention spring piece 53 can surely prevent the suction chamber heat-insulating member 40 from falling out of the suction chamber 26, and the elastic deformation of the pressing spring piece 54 makes the suction chamber heat insulating material 41. Can be strongly pressed against the valve / port forming body 13.

  (7) The drop-off prevention spring piece 53 and the pressing spring piece 54 are made of leaf springs. Therefore, a configuration for preventing the suction chamber heat insulating member 40 from falling out of the suction chamber 26 and a configuration for pressing the suction chamber heat insulating material 41 against the valve / port forming body 13 can be easily formed. it can.

  (8) The assembly member 55 is integrally provided on the suction chamber mounting member 51. For this reason, it is possible to prevent the suction chamber heat insulating material 41 from falling off from the suction chamber mounting member 51 due to the engagement of the assembly piece 55 with the suction chamber heat insulating material 41 (engagement step portion 42a). . Further, whether or not the suction chamber mounting member 51 is securely assembled to the suction chamber heat insulating material 41 based on the presence or absence of an engagement sound generated when the assembly piece 55 is engaged with the engagement step portion 42a. Can be confirmed.

  (9) The inner wall surface 14 c (the inner surface of the discharge chamber 27) of the rear housing 14 is covered with the discharge chamber heat insulating member 60. The discharge chamber heat insulating member 60 reduces heat transfer from the refrigerant gas in the discharge chamber 27 to the rear housing 14. Reduction of heat transfer from the refrigerant gas in the discharge chamber 27 to the rear housing 14 leads to suppression of heat transfer from the rear housing 14 to the refrigerant gas in the suction chamber 26.

  (10) The portion (the inner wall surface 14c in the housing recess 14b) where the drop-off preventing spring piece 53 of the suction chamber heat insulating member 40 is pressed against the rear housing 14 is inevitably formed in order to form the nut portion 14a of the through bolt B that joins the housing. It is a site formed automatically. Therefore, the suction chamber heat-insulating member 40 can be prevented from falling off from the rear housing 14 by utilizing the part (accommodating recess 14b) originally present in the rear housing 14.

(Second Embodiment)
A second embodiment in which the present invention is embodied as a variable displacement piston compressor (hereinafter simply referred to as a compressor) will be described below with reference to FIGS. In the embodiment described below, the same components as those in the first embodiment described above are denoted by the same reference numerals, and the redundant description thereof is omitted or simplified. In the following description, for the “front” and “rear” of the compressor, the direction of the arrow Y2 shown in FIG.

As shown in FIG. 7, a suction chamber heat insulation member 90 is accommodated in the suction chamber 26, and a discharge chamber heat insulation member 100 is accommodated in the discharge chamber 27.
First, the suction chamber heat insulating member 90 will be described. Unlike the first embodiment, the suction chamber heat insulating member 90 is formed of a synthetic resin material having elasticity as a whole, is formed in an annular shape that can be inserted into the suction chamber 26, and the circumferential direction of the suction chamber heat insulating member 90 is A suction space S <b> 1 extending along the front end surface 90 a is recessed from the front end surface 90 a (end surface on the valve / port forming body 13 side) of the suction chamber heat insulating member 90. The suction chamber heat insulating member 90 is made of PPS (polyphenylene sulfide resin) containing glass fiber and elastomer. In addition, the material which forms the suction chamber heat insulation member 90 may not be added with glass fiber.

  As shown in FIG. 8, a plurality of convex portions 92 are formed on the outer peripheral surface of the suction chamber heat insulating member 90 along the circumferential direction of the suction chamber heat insulating member 90, and a concave portion 93 is formed between the adjacent convex portions 92. Is formed. One of the plurality of convex portions 92 of the suction chamber heat insulating member 90 is formed with a suction hole 95 communicating with the suction space S1.

  On each of the outer peripheral surfaces of the three convex portions 92 in the suction chamber heat insulating member 90, a drop prevention protrusion 96 as a drop prevention portion is integrally formed, and the three drop prevention protrusions 96 extend along the circumferential direction of the suction chamber heat insulation member 90. It is provided at equal intervals. The drop-off prevention protrusions 96 are each formed in a trapezoidal cone shape, and are formed so as to taper from the proximal end toward the distal end. Further, as shown in FIG. 9, on the rear end surface 90b of the suction chamber heat insulating member 90, a pressing projection 97 is integrally formed as a pressing portion near the inner periphery of each drop-off preventing projection 96, and three pressing contacts are formed. The protrusions 97 are provided at regular intervals along the circumferential direction of the suction chamber heat insulating member 90. Each of the pressing protrusions 97 is formed in a trapezoidal cone shape, and is formed so as to taper as it goes from the proximal end to the distal end.

  7 and 8, when the suction chamber heat insulating member 90 is housed in the suction chamber 26, each of the plurality of convex portions 92 of the suction chamber heat insulating member 90 is in the housing concave portion 14b of the rear housing 14. Is housed in. The three drop-off preventing projections 96 are housed in the housing recess 14b and are elastically deformed so as to come into pressure contact with the inner wall surface 14c of the housing recess 14b. By this pressure contact, the suction chamber heat insulating member 90 from the suction chamber 26 is pressed. Dropping is prevented. In this drop-off prevention state, the inner wall surface 14 c of the rear housing 14 is covered with the suction chamber heat insulating member 90.

  Further, the three pressing protrusions 97 are elastically deformed and pressed against the inner wall surface 14 c of the rear housing 14 to press the suction chamber heat insulating member 90 toward the valve / port forming body 13. Therefore, the front end surface 90 a of the suction chamber heat insulating member 90 is pressed against the valve / port forming body 13. In this pressing state, no gap is formed between the front end surface 90a of the suction chamber heat insulating member 90 and the valve / port forming body 13, and leakage of the refrigerant gas is prevented. Further, in the state where the suction chamber heat insulating member 90 is accommodated in the suction chamber 26 and positioned, the drop-off preventing projection 96 has the inner wall surface 14c of the rear housing 14 and the outer peripheral surface (convex portion 92) of the suction chamber heat insulating member 90. ) To the outside of the suction chamber 26.

  Next, the discharge chamber heat insulating member 100 will be described. As shown in FIG. 8, unlike the first embodiment, the discharge chamber heat insulating member 100 is formed of a synthetic resin material having elasticity as a whole and is formed in a cup shape that can be inserted into the discharge chamber 27. In the discharge chamber heat insulating member 100, the discharge space S <b> 2 is recessed from the front end surface 100 a (the end surface on the valve / port forming body 13 side) of the discharge chamber heat insulating member 100. The discharge chamber heat insulating member 100 is made of glass fiber and PPS (polyphenylene sulfide resin) containing an elastomer. In addition, the material which forms the discharge chamber heat insulation member 100 may not be added with glass fiber.

  A plurality of convex portions 102 are formed on the outer peripheral surface of the discharge chamber heat insulating member 100 along the circumferential direction of the discharge chamber heat insulating member 100, and a concave portion 103 is formed between adjacent convex portions 102. A discharge hole 105 communicating with the discharge space S <b> 2 is formed at the center of the discharge chamber heat insulating member 100.

  As shown in FIG. 10, a drop-off prevention protrusion 106 as a drop-off prevention part is integrally formed on each of the outer peripheral surfaces of the three protrusions 102 in the discharge chamber heat insulation member 100, and the three drop-off prevention protrusions 106 are formed in the discharge chamber heat insulation member. 100 are provided at equal intervals along the circumferential direction. Each of the drop-off prevention protrusions 106 is formed in a trapezoidal cone shape, and is formed so as to taper as it goes from the proximal end to the distal end. Further, on the rear end surface 100b of the discharge chamber heat insulating member 100, a pressing protrusion 107 is integrally formed as a pressing portion closer to the inner periphery than each drop prevention protrusion 106, and the three pressing protrusions 107 are formed in the discharge chamber heat insulating member. 100 are provided at equal intervals along the circumferential direction. Each of the pressing protrusions 107 is formed in a trapezoidal cone shape, and is formed so as to be tapered from the proximal end toward the distal end.

  As shown in FIG. 8, in a state where the discharge chamber heat insulating member 100 is accommodated in the discharge chamber 27, each of the plurality of convex portions 102 of the discharge chamber heat insulating member 100 is accommodated in the accommodating concave portion 141 b of the partition wall 141. ing. The three drop-off prevention protrusions 106 are housed in the housing recess 141b and are elastically deformed to press against the inner wall surface 14c of the housing recess 141b, thereby preventing the discharge chamber heat insulating member 100 from falling off from the discharge chamber 27. is doing. In this falling-off prevention state, the inner wall surface 14 c of the rear housing 14 that forms the discharge chamber 27 is covered with the discharge chamber heat insulating member 100.

  Further, as shown in FIG. 7, the three pressing protrusions 107 are elastically deformed and pressed against the inner wall surface 14 c of the partition wall 141 to press the discharge chamber heat insulating member 100 toward the valve / port forming body 13. . For this reason, the front end surface 100 a of the discharge chamber heat insulating member 100 is pressed against the valve / port forming body 13. In this pressing state, a gap is not formed between the front end surface 100a of the discharge chamber heat insulating member 100 and the valve / port forming body 13, and leakage of the refrigerant gas is prevented. In addition, in a state where the discharge chamber heat insulating member 100 is accommodated in the discharge chamber 27 and positioned, the drop prevention protrusion 106 is provided between the inner wall surface 14 c of the partition wall 141 and the outer peripheral surface of the discharge chamber heat insulating member 100. , Exposed outside the discharge chamber 27.

Therefore, according to the second embodiment, the following effects can be obtained in addition to the same effects as (1) to (5), (9), and (10) described in the first embodiment. .
(11) In the second embodiment, the suction chamber heat insulating member 90 is made of a synthetic resin material having elasticity, and the drop-off prevention protrusion 96 and the pressing protrusion 97 are integrally formed. Therefore, it is possible to easily form a configuration for preventing the suction chamber heat insulating member 90 from falling out of the suction chamber 26 and a configuration for pressing the suction chamber heat insulating member 90 against the valve / port forming body 13. it can.

In addition, you may change the said embodiment as follows.
In the first embodiment, as shown in FIG. 11A, the tip end side of the drop-off prevention spring piece 53 may be formed without being folded back.

In the first embodiment, as shown in FIG. 11B, the elongate metal plate forming the suction chamber attachment member 51 may be cut and raised from the tip side to form the drop-off preventing spring piece 53.
In the first embodiment, as shown in FIG. 11 (c), a drop-off preventing spring piece 53 is formed by bending and deforming a part of the elongated metal plate forming the suction chamber attachment member 51. May be. With this configuration, the protruding end of the drop-off preventing spring piece 53 is arcuate, so that the suction chamber heat insulating member 40 is accommodated in the suction chamber 26 even if the inner wall surface 14c of the rear housing 14 is a cast surface. In doing so, it is possible to prevent the drop-off preventing spring piece 53 from being caught on the inner wall surface 14c.

  In the first embodiment, as shown in FIG. 12 (a), the elongated metal plate forming the suction chamber mounting member 51 is bent outward and then bent inward to serve as a drop-off prevention part. The drop-off preventing projection 56 may be formed, and the assembly piece 55 that can be engaged with the engaging step portion 42 a may be formed by bending the tip end side inward from the drop-off preventing projection 56. Further, in this case, an engagement recess 14e in which the drop-off preventing projection 56 can be engaged is formed on the inner wall surface 14c of the rear housing 14. When configured in this manner, the engagement between the drop-off preventing projection 56 and the engagement recess 14 e prevents the suction chamber heat insulating member 40 from falling off the rear housing 14, and the engagement step portion of the assembly piece 55. Due to the engagement with 42a, the suction chamber heat insulating material 41 is prevented from falling off from the suction chamber mounting member 51.

  In the first embodiment, as shown in FIG. 12B, a bulging portion 41c is formed on the rear end surface 41b of the suction chamber heat insulating material 41, and the suction chamber mounting member 51 is formed on the bulging portion 41c. The engaging groove 41d with which the main body 52 can engage may be formed so as to be parallel to the rear end surface 41b, and the main body 52 may be engaged with the engaging groove 41d. With this configuration, the suction chamber heat insulating material 41 is prevented from falling off from the suction chamber mounting member 51 by the engagement of the main body 52 with the engagement groove 41d. Accordingly, the engaging groove 41d prevents the suction chamber heat insulating material 41 from falling off from the suction chamber mounting member 51, and the suction chamber mounting member 51 and the suction chamber heat insulating material 41 are assembled together. Is configured.

  In the first embodiment, as shown in FIG. 12 (c), the elongated metal plate forming the suction chamber mounting member 51 is bent inward, and then bent outward to form an assembly portion. The assembly protrusion 58 may be formed, and the tip end side may be folded back from the assembly protrusion 58 to form the drop-off preventing spring piece 53. Further, an engagement recess 42c with which the assembly protrusion 58 can engage is formed on the outer surface of the projection 42 in the heat insulating material 41 for the suction chamber. In such a configuration, the suction chamber heat insulating material 41 is prevented from falling off from the suction chamber mounting member 51 by the engagement between the assembly protrusion 58 and the engagement recess 42c.

  ○ In the second embodiment, as shown in FIG. 13A, the drop-off prevention protrusion 96 extends in a rod shape from the outer surface of the suction chamber heat insulating member 90, and then extends so as to bend toward the front end surface 90a. It may be formed. With this configuration, when the drop-off prevention protrusion 96 is pressed against the inner wall surface 14c of the rear housing 14, only the periphery of the bent portion of the drop-off prevention protrusion 96 is elastically deformed, and the valve / port forming body 13 of the suction chamber heat insulating member 90 is formed. The side end face is not elastically deformed. For this reason, the suction chamber heat insulating member 90 is not elastically deformed, the pressure contact state of the front end surface 90a to the valve / port forming body 13 is maintained, and the state in which the refrigerant gas is prevented from leaking is maintained.

  ○ In the second embodiment, as shown in FIG. 13B, the drop-off prevention protrusion 96 extends in a rod shape from the outer surface of the suction chamber heat insulating member 90, and then extends so as to bend toward the front end surface 90a. It may be formed. Further, an engagement recess 14 d that can be engaged with the drop-off prevention projection 96 is formed on the inner wall surface 14 c of the rear housing 14.

  In the second embodiment, as shown in FIG. 13C, the drop-off prevention projection 96 may be provided in a rod shape from the rear end surface 90b of the suction chamber heat insulating member 90. In this case, the rear housing 14 In the inner wall surface 14c, a press-fit recess 14f into which the drop-off preventing projection 96 can be press-fitted is provided at a position facing the suction chamber heat insulating member 90. With this configuration, the suction chamber heat insulating member 90 is positioned in the suction chamber 26 by press-fitting the drop-off preventing projection 96 into the press-fit recess 14f, and the suction chamber heat insulating member 90 is prevented from falling off the rear housing 14. Further, the front end surface 90a of the suction chamber heat insulating member 90 can be pressed against the valve / port forming body 13 by adjusting the press-fitting amount of the drop-off preventing projection 96 into the press-fitting recess 14f. Therefore, in this configuration, the drop-off prevention projection 96 and the press-fit recess 14f constitute a pressing portion.

In each embodiment, the shape of the suction chamber heat insulating members 40, 90 (the number of the convex portions 42, 92) may be changed according to the number of cylinder bores 22.
In each embodiment, the discharge chamber heat insulating member 60 and the discharge chamber heat insulating member 100 may be omitted.

  ○ In the first embodiment, the assembly piece 55 may be omitted. In this case, when the fall-off preventing spring piece 53 is in pressure contact with the inner wall surface 14c of the rear housing 14, the suction chamber mounting member 51 is pressed into contact with the suction chamber heat insulating material 41, and the suction chamber heat insulating material 41 is mounted in the suction chamber. Omission from the member 51 is prevented.

  In each embodiment, rubber is applied to the front end surface 41a of the suction chamber heat insulating material 41, the front end surface 71a of the discharge chamber heat insulating material 71, the front end surface 90a of the suction chamber heat insulating member 90, and the front end surface 100a of the discharge chamber heat insulating member 100. A layer may be provided. If comprised in this way, the refrigerant | coolant leakage from between each front end surface 41a, 71a, 90a, 100a and the valve / port formation body 13 can be prevented reliably.

  In the first embodiment, the numbers of the drop-off prevention spring pieces 53, the pressing spring pieces 54, and the assembly pieces 55 may be arbitrarily changed. In the second embodiment, the drop-off prevention protrusions 56 and the pressing contact pieces The number of protrusions 97 may be arbitrarily changed.

  In the first embodiment, the arrangement of the drop-off prevention spring piece 53, the pressing spring piece 54 and the assembly piece 55 may be arbitrarily changed. In the second embodiment, the drop-out prevention projection 56 and the pressing contact The arrangement of the protrusions 97 may be arbitrarily changed.

  The present invention may be applied to a double-headed piston type compressor in which a double-headed piston is housed in the cylinder bore 22 of the cylinder block 11 and a suction chamber and a discharge chamber are defined in the front housing 12 and the rear housing 14. In this case, the front housing 12 and the rear housing 14 constitute a cover housing.

The present invention may be applied to a variable displacement piston compressor in which a discharge chamber is provided on the outer peripheral side of the rear housing 14 and the suction chamber is surrounded by the discharge chamber around the axis of the rotary shaft 16.
O You may apply this invention to compressors other than a piston type compressor.

  The present invention may be applied to a fixed capacity type compressor.

The longitudinal cross-sectional view which shows the compressor of 1st Embodiment. The front view which shows the suction chamber and discharge chamber in a rear housing. The front view which shows a suction chamber heat insulation member. (A) is a fragmentary sectional view which shows the fall prevention spring piece and the pressing spring piece vicinity, (b) is a fragmentary sectional view which shows the assembly piece vicinity. The front view which shows a discharge chamber heat insulation member. (A) is a fragmentary sectional view which shows the fall prevention spring piece and the pressing spring piece vicinity, (b) is a fragmentary sectional view which shows the assembly piece vicinity. The longitudinal cross-sectional view which shows the suction chamber and discharge chamber in 2nd Embodiment. The front view which shows the suction chamber and discharge chamber in a rear housing. The front view which shows a suction chamber heat insulation member. The front view which shows a discharge chamber heat insulation member. (A)-(c) is a fragmentary sectional view which shows another example of the drop-off prevention spring piece in 1st Embodiment. (A)-(c) is a fragmentary sectional view which shows another example of the suction chamber heat insulation member of 1st Embodiment. (A)-(c) is a fragmentary sectional view which shows another example of the suction chamber heat insulation member of 2nd Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Compressor, 11 ... Cylinder block, 13 ... Valve / port formation body, 14 ... Rear housing as a cover housing, 14c ... Inner wall surface, 14f ... Press-fit recessed part which comprises a pressing part, 26 ... Suction chamber, 27 ... Discharge chamber, 40, 90 ... suction chamber heat insulating member as a heat insulating member, 41 ... heat insulating material for suction chamber, 41d ... engagement groove as an assembling part, 51 ... suction chamber mounting member as a mounting member, 52 ... main body 53, a drop-off prevention spring piece as a drop-off prevention part, 54 ... a pressing spring piece as a pressing part, 55 ... an assembly piece as an assembly part, 56 ... a drop-off prevention protrusion as a drop-off prevention part, 58 ... assembly protrusion as an assembly part, 60, 100 ... discharge chamber insulation member as a heat insulation member, 96 ... drop-off prevention protrusion as a drop-off prevention part, 97 ... push-contact protrusion as a press-contact part, 141 ... partition wall .

Claims (7)

A cover housing is joined to the cylinder block via a valve / port formation body, and a suction chamber that opens toward the valve / port formation body is defined in the cover housing, and an inside of the cover housing is formed in the suction chamber. A compressor provided with a heat insulating member covering a wall surface,
A drop-off prevention portion for preventing the heat-insulating member from falling off from the suction chamber, and a pressing portion for pressing the heat-insulating member toward the valve / port forming body are provided integrally with the heat-insulating member, and the cover The compressor characterized in that the drop-off prevention portion is exposed to the outside of the suction chamber from between a housing and the heat insulating member.   The drop-off prevention part is formed to be elastically deformable and is pressed against the inner wall surface of the cover housing to prevent the heat insulating member from falling out of the suction chamber, and the pressing part is formed to be elastically deformable. The compressor according to claim 1, wherein the heat insulating member is pressed against the valve / port forming body by being pressed against an inner wall surface of the cover housing.   The compressor according to claim 1 or 2, wherein the heat insulation member is formed by attaching a metal material attachment member integrally provided with the drop-off prevention portion and the pressing portion to a heat insulation material made of a synthetic resin material. . The said attachment member is integrally provided with a drop-off prevention spring piece made up of a leaf spring as the drop-off prevention portion and a pressing spring piece made up of a plate spring as the pushing-contact portion in the annular main body portion. Compressor.   The compressor according to claim 3 or 4, wherein the attachment member includes an assembly portion that integrally attaches the attachment member and the heat insulating material while preventing the heat insulating material from falling off the attachment member.   2. The compressor according to claim 1, wherein the heat insulating member is made of a synthetic resin material having elasticity as a whole, and the drop-off preventing portion and the pressing portion are integrally formed.   In the cover housing, a discharge chamber is defined by a partition wall on an outer peripheral side or an inner peripheral side of the suction chamber, and the discharge chamber opens toward the valve / port forming body, and the cover is formed in the discharge chamber. The compressor according to any one of claims 1 to 6, wherein a heat insulating member that covers an inner wall surface of the housing is provided.

Images