Rotary compressor

Abstract

The rotary compressor (1) includes: a compressor housing (10) provided with a refrigerant discharge portion (107) and a refrigerant suction portion (104, 105); a compression portion (12) disposed within the compressor housing (10) that compresses the refrigerant sucked from the suction portion (104, 105) and discharges it from the discharge portion (107); an electric motor (11) disposed within the compressor housing (10) for driving the compression portion (12); a liquid reservoir connected to the suction portion (104, 105); and a mounting member (50) that fixes the liquid reservoir to the compressor housing (10). The compressor housing (10) and the liquid storage container (26) of the liquid reservoir are formed of a metallic material. At least a part of the mounting member (50) is formed of a resin material, and the mounting member (50) has a first engaging portion (J1) that engages with the outer peripheral surface (10a) of the compressor housing (10).

Description

Technical Field

[0001] The present invention relates to a rotary compressor. Background Art

[0002] As a compressor for an air conditioner or a refrigerator, there is known a rotary compressor including: a compressor housing provided with a refrigerant discharge portion and a refrigerant suction portion; a compression portion that compresses the refrigerant sucked from the suction portion and discharges it from the discharge portion; an electric motor that drives the compression portion; and a liquid receiver that is fixed to the outside of the compressor housing and connected to the suction portion.

[0003] Such a rotary compressor has a structure in which a metal liquid receiver container of the liquid receiver is supported by mounting parts welded to the outer peripheral surface of the metal compressor housing.

[0004] Patent Document: Japanese Patent Application Laid-Open No. 2017-89521 Summary of the Invention

[0005] When the above-described rotary compressor operates, vibrations generated by the metal compressor housing are transmitted to the metal liquid receiver container via the mounting parts. For example, there is a problem that the noise increases due to resonance of the liquid receiver container.

[0006] The disclosed technology is proposed in view of the above problems, and an object thereof is to provide a rotary compressor capable of suppressing the occurrence of vibrations and reducing noise.

[0007] One aspect of the rotary compressor disclosed by the present invention includes: a compressor housing provided with a refrigerant discharge portion and a refrigerant suction portion; a compression portion disposed inside the compressor housing that compresses the refrigerant sucked from the suction portion and discharges it from the discharge portion; an electric motor disposed inside the compressor housing that drives the compression portion; a liquid receiver connected to the suction portion; and a mounting member that fixes the liquid receiver to the compressor housing, wherein the compressor housing and the liquid receiver container are formed of a metal material; at least a part of the mounting member is formed of a resin material, and the mounting member has a first joint portion joined to the outer peripheral surface of the compressor housing.

[0008] According to one aspect of the rotary compressor disclosed by the present invention, it is possible to suppress the occurrence of vibrations and ensure the mechanical strength of the mounting state of the liquid receiver. Brief Description of the Drawings

[0009] Figure 1 is a longitudinal sectional view showing the rotary compressor of Example 1.

[0010] Figure 2 is an exploded perspective view showing the compression portion of the rotary compressor of Example 1.

[0011] Figure 3 It is a top view showing the main part of the rotary compressor of Embodiment 1.

[0012] Figure 4 It is a perspective view showing the liquid receiver fixing bracket of the rotary compressor of Embodiment 1.

[0013] Figure 5 It is a top view showing the main part of the rotary compressor of Embodiment 2.

[0014] Figure 6 It is a perspective view showing the liquid receiver fixing bracket of the rotary compressor of Embodiment 2. Detailed implementation mode

[0015] Hereinafter, embodiments of the rotary compressor disclosed by the present invention will be described in detail based on the drawings. In addition, the rotary compressor disclosed by the present invention is not limited by the following embodiments.

[0016] Embodiment 1

[0017] Structure of the rotary compressor

[0018] Figure 1 It is a longitudinal sectional view showing the rotary compressor of Embodiment 1. Figure 2 It is an exploded perspective view showing the compression part of the rotary compressor of Embodiment 1.

[0019] As Figure 1 shown, the rotary compressor 1 has: a compression part 12, which is arranged in the lower part of a vertically arranged cylindrical compressor housing 10 in a sealed state; a motor 11, which is arranged in the upper part of the compressor housing 10 and drives the compression part 12 through a rotating shaft 15; and a liquid receiver 25, which is vertically arranged in a cylindrical shape and fixed to the outer peripheral surface of the compressor housing 10.

[0020] The liquid receiver 25 includes: a vertically arranged cylindrical liquid storage container 26; and a low-pressure inlet pipe 27 connected to the upper part of the liquid storage container 26. The liquid storage container 26 is connected to the upper cylinder chamber 130T of the upper cylinder 121T (refer to Figure 2 ) through an upper suction pipe 105 and an L-shaped low-pressure connection pipe 31T; and is connected to the lower cylinder chamber 130S of the lower cylinder 121S (refer to Figure 2) Connection. The low-pressure inlet pipe 27 is disposed through the upper part of the liquid storage container 26 and is connected to the low-pressure side in the refrigeration cycle. Further, inside the liquid storage container 26, a filter screen 29 for capturing foreign matters in the refrigerant supplied from the low-pressure inlet pipe 27 is provided between the low-pressure inlet pipe 27 and the low-pressure connection pipes 31T, 31S. The accumulator 25 allows the separated gaseous refrigerant to pass through the two low-pressure connection pipes 31T, 31S and sends it from the liquid storage container 26 to the compressor housing 10. Further, the liquid storage container 26 is fixed to the outer peripheral surface 10a of the compressor housing 10 by a liquid storage container fixing bracket 50 described later.

[0021] The motor 11 has a stator 111 disposed on the outside and a rotor 112 disposed on the inside. The stator 111 is fixed to the inner peripheral surface of the compressor housing 10 in a shrink-fit state; the rotor 112 is fixed to the rotating shaft 15 in a shrink-fit state.

[0022] By rotatably supporting the sub-shaft portion 151 below the lower eccentric portion 152S on the sub-bearing portion 161S provided on the lower end plate 160S, rotatably supporting the main shaft portion 153 above the upper eccentric portion 152T on the main bearing portion 161T provided on the upper end plate 160T, and supporting the upper piston 125T and the lower piston 125S on the upper eccentric portion 152T and the lower eccentric portion 152S provided with a phase difference of 180 degrees from each other, the rotating shaft 15 is rotatably supported relative to the compression portion 12, and by rotating the rotating shaft 15, the upper piston 125T and the lower piston 125S revolve along the inner peripheral surfaces 137T of the upper cylinder 121T and 137S of the lower cylinder 121S, respectively.

[0023] Inside the compressor housing 10, lubricating oil 18 in an amount almost submerging the compression portion 12 is enclosed to ensure the lubricity of sliding portions such as the upper piston 125T and the lower piston 125S sliding in the compression portion 12 and to seal the upper compression chamber 133T (refer to Figure 2 ) and the lower compression chamber 133S (refer to Figure 2 ). On the lower side of the compressor housing 10, a mounting leg 310 (refer to Figure 1 ) is fixed, which engages multiple elastic support members (not shown) that support the entire rotary compressor 1.

[0024] As Figure 1 shown, in the compressor housing 10, a discharge pipe 107 is provided as a discharge portion for discharging the refrigerant at the upper part, and an upper suction pipe 105 and a lower suction pipe 104 are provided as suction portions for sucking the refrigerant at the side faces. The compression portion 12 compresses the refrigerant sucked from the upper suction pipe 105 and the lower suction pipe 104 and discharges it from the discharge pipe 107. As Figure 2As shown, the compression section 12 is formed by laminating, from above, an upper end plate cover 170T, an upper end plate 160T, an annular upper air cylinder 121T, an intermediate partition plate 140, an annular lower air cylinder 121S, a lower end plate 160S, and a flat lower end plate cover 170S. The upper end plate cover 170T has a bulging portion, and a hollow space is formed inside the bulging portion. The entire compression section 12 is fixed from above and below by a plurality of through bolts 174, 175, and auxiliary bolts 176 arranged on substantially concentric circles.

[0025] As Figure 2 shown, a cylindrical inner peripheral surface 137T is formed in the upper air cylinder 121T. An upper piston 125T having an outer diameter smaller than the inner diameter of the inner peripheral surface 137T of the upper air cylinder 121T is arranged inside the inner peripheral surface 137T of the upper air cylinder 121T. An upper compression chamber 133T for sucking, compressing, and discharging the refrigerant is formed between the inner peripheral surface 137T and the outer peripheral surface 139T of the upper piston 125T. A cylindrical inner peripheral surface 137S is formed in the lower air cylinder 121S. A lower piston 125S having an outer diameter smaller than the inner diameter of the inner peripheral surface 137S of the lower air cylinder 121S is arranged inside the inner peripheral surface 137S of the lower air cylinder 121S. A lower compression chamber 133S for sucking, compressing, and discharging the refrigerant is formed between the inner peripheral surface 137S and the outer peripheral surface 139S of the lower piston 125S.

[0026] The upper air cylinder 121T has an upper side protrusion 122T that radially protrudes from the circular outer peripheral portion toward the cylindrical inner peripheral surface 137T. The upper side protrusion 122T is provided with upper vane grooves 128T that extend radially outward from the upper cylinder chamber 130T. Upper vanes 127T are slidably arranged in the upper vane grooves 128T. The lower air cylinder 121S has a lower side protrusion 122S that radially protrudes from the circular outer peripheral portion toward the cylindrical inner peripheral surface 137S. The lower side protrusion 122S is provided with lower vane grooves 128S that extend radially outward from the lower cylinder chamber 130S. Lower vanes 127S are slidably arranged in the lower vane grooves 128S.

[0027] In the upper air cylinder 121T, upper spring holes 124T are provided at positions coinciding with the upper vane grooves 128T from the outer side surface to a depth that does not penetrate into the upper cylinder chamber 130T. Upper springs 126T are arranged in the upper spring holes 124T. In the lower air cylinder 121S, lower spring holes 124S are provided at positions coinciding with the lower vane grooves 128S from the outer side surface to a depth that does not penetrate into the lower cylinder chamber 130S. Lower springs 126S are arranged in the lower spring holes 124S.

[0028] In addition, a lower pressure introduction passage 129S is formed in the lower cylinder 121S, which communicates the radially outer side of the lower vane groove 128S with the inside of the compressor housing 10 through an opening portion, and introduces the compressed refrigerant in the compressor housing 10, and applies back pressure to the lower vane 127S through the pressure of the refrigerant. In addition, the compressed refrigerant in the compressor housing 10 is also introduced from the lower spring hole 124S. Further, an upper pressure introduction passage 129T is formed in the upper cylinder 121T, which communicates the radially outer side of the upper vane groove 128T with the inside of the compressor housing 10 through an opening portion, and introduces the compressed refrigerant in the compressor housing 10, and applies back pressure to the upper vane 127T through the pressure of the refrigerant. In addition, the compressed refrigerant in the compressor housing 10 is also introduced from the upper spring hole 124T.

[0029] An upper suction hole 135T, which is a through hole and is fitted with the upper suction pipe 105, is provided in the upper side protrusion 122T of the upper cylinder 121T. A lower suction hole 135S, which is a through hole and is fitted with the lower suction pipe 104, is provided in the lower side protrusion 122S of the lower cylinder 121S.

[0030] The upper and lower sides of the upper cylinder chamber 130T are respectively closed by the upper end plate 160T and the intermediate partition plate 140. The upper and lower sides of the lower cylinder chamber 130S are respectively closed by the intermediate partition plate 140 and the lower end plate 160S.

[0031] The upper vane 127T is pressed by the upper spring 126T and abuts against the outer peripheral surface 139T of the upper piston 125T. Thus, the upper cylinder chamber 130T is divided into an upper suction chamber 131T communicating with the upper suction hole 135T and an upper compression chamber 133T communicating with the upper discharge hole 190T provided in the upper end plate 160T (refer to Figure 3 ). The lower vane 127S is pressed by the lower spring 126S and abuts against the outer peripheral surface 139S of the lower piston 125S. Thus, the lower cylinder chamber 130S is divided into a lower suction chamber 131S communicating with the lower suction hole 135S and a lower compression chamber 133S communicating with the lower discharge hole 190S provided in the lower end plate 160S (refer to Figure 3 ).

[0032] As Figure 2 shown, an upper discharge hole 190T that penetrates the upper end plate 160T and communicates with the upper compression chamber 133T of the upper cylinder 121T is provided in the upper end plate 160T, and an upper valve seat (not shown) is formed around the upper discharge hole 190T on the outlet side of the upper discharge hole 190T. An upper discharge valve storage recess 164T is formed in the upper end plate 160T, which extends in a groove shape along the circumferential direction of the upper end plate 160T from the position of the upper discharge hole 190T.

[0033] The upper discharge valve housing recess 164T houses the entirety of a reed valve type upper discharge valve 200T and an upper discharge valve pressing plate 201T. The rear end portion of the upper discharge valve 200T is fixed within the upper discharge valve housing recess 164T by an upper rivet 202T, and its front portion is used to open or close the upper discharge hole 190T. The rear end portion of the upper discharge valve pressing plate 201T overlaps the upper discharge valve 200T and is fixed within the upper discharge valve housing recess 164T by an upper rivet 202T, and its front portion is bent (warped) to limit the opening degree of the upper discharge valve 200T.

[0034] A lower discharge hole 190S is provided in the lower end plate 160S, penetrating the lower end plate 160S and communicating with the lower compression chamber 133S of the lower cylinder 121S. A lower discharge valve housing recess (not shown) extending in a groove shape along the circumferential direction of the lower end plate 160S is formed in the lower end plate 160S at the position of the lower discharge hole 190S.

[0035] The lower discharge valve housing recess houses the entirety of a reed valve type lower discharge valve 200S and a lower discharge valve pressing plate 201S. The rear end portion of the lower discharge valve 200S is fixed within the lower discharge valve housing recess by a lower rivet 202S, and its front portion is used to open or close the lower discharge hole 190S. The rear end portion of the lower discharge valve pressing plate 201S overlaps the lower discharge valve 200S and is fixed within the lower discharge valve housing recess by a lower rivet 202S, and its front portion is bent (warped) to limit the opening degree of the lower discharge valve 200S.

[0036] An upper end plate cover chamber 180T is formed between the upper end plate 160T and the upper end plate cover 170T with a bulging portion, which are tightly fixed to each other. A lower end plate cover chamber 180S is formed between the lower end plate 160S and the flat lower end plate cover 170S, which are tightly fixed to each other (refer to Figure 1 ). A refrigerant communication hole 136 is provided, penetrating the lower end plate 160S, the lower cylinder 121S, the intermediate partition 140, the upper end plate 160T, and the upper cylinder 121T to communicate the lower end plate cover chamber 180S and the upper end plate cover chamber 180T.

[0037] Next, the flow of the refrigerant generated by the rotation of the rotary shaft 15 will be described. In the upper cylinder chamber 130T, due to the rotation of the rotary shaft 15, the upper piston 125T fitted to the upper eccentric portion 152T of the rotary shaft 15 revolves along the inner peripheral surface 137T of the upper cylinder 121T (the outer peripheral surface of the upper cylinder chamber 130T). As a result, the upper suction chamber 131T expands its volume while sucking the refrigerant from the upper suction pipe 105, and the upper compression chamber 133T compresses the refrigerant while reducing its volume. When the pressure of the compressed refrigerant is higher than the pressure in the upper end plate cover chamber 180T outside the upper discharge valve 200T, the upper discharge valve 200T opens, and the refrigerant is discharged from the upper compression chamber 133T to the upper end plate cover chamber 180T. The refrigerant discharged into the upper end plate cover chamber 180T is discharged from the upper end plate cover discharge hole 172T provided in the upper end plate cover 170T (refer to Figure 1 ) into the compressor housing 10.

[0038] In addition, in the lower cylinder chamber 130S, due to the rotation of the rotary shaft 15, the lower piston 125S fitted to the lower eccentric portion 152S of the rotary shaft 15 revolves along the inner peripheral surface 137S of the lower cylinder 121S (the outer peripheral surface of the lower cylinder chamber 130S). As a result, the lower suction chamber 131S expands its volume while sucking the refrigerant from the lower suction pipe 104, and the lower compression chamber 133S compresses the refrigerant while reducing its volume. When the pressure of the compressed refrigerant is higher than the pressure in the lower end plate cover chamber 180S outside the lower discharge valve 200S, the lower discharge valve 200S opens, and the refrigerant is discharged from the lower compression chamber 133S to the lower end plate cover chamber 180S. The refrigerant discharged into the lower end plate cover chamber 180S is discharged into the compressor housing 10 through the refrigerant passage hole 136 and the upper end plate cover chamber 180T from the upper end plate cover discharge hole 172T provided in the upper end plate cover 170T.

[0039] The refrigerant discharged into the compressor housing 10 is guided above the motor 11 through the upper and lower communicating cuts (not shown) provided on the outer periphery of the stator 111, or the gaps in the winding portion of the stator 111 (not shown), or the gap 115 between the stator 111 and the rotor 112 (refer to Figure 1 ) and is discharged from the discharge pipe 107, which is the discharge portion arranged at the upper part of the compressor housing 10.

[0040] Characteristic structure of the rotary compressor

[0041] Next, the characteristic structure of the rotary compressor 1 of Embodiment 1 will be described. The features of Embodiment 1 include the mounting structure for fixing the accumulator 25 to the compressor housing 10. Figure 3 It is a top view showing the main part of the rotary compressor 1 of Embodiment 1. Figure 4 It is a perspective view showing the accumulator fixing bracket of the rotary compressor 1 of Embodiment 1.

[0042] As Figure 3 and Figure 4 shown, the rotary compressor 1 of Embodiment 1 includes a liquid receiver fixing bracket 50 as a mounting member for fixing the liquid receiver container 26 of the liquid receiver 25 to the compressor housing 10. In this Embodiment 1, the compressor housing 10 and the liquid receiver container 26 of the liquid receiver 25 are formed of a metal material such as a steel plate.

[0043] The liquid receiver fixing bracket 50 has a set of mounting pieces 50A which are mounted in a manner of sandwiching the compressor housing 10 and the liquid receiver container 26 respectively. The set of mounting pieces 50A are formed of only a resin material into the same shape. Each mounting piece 50A has one end 51a abutting against the outer peripheral surface 10a of the compressor housing 10 and another end 51b abutting against the outer peripheral surface 26a of the liquid receiver container 26, and is formed in an L shape with a cross section where one end 51a and another end 51b cross each other.

[0044] Each mounting piece 50A is provided with a first joint portion J1 joined to the outer peripheral surface 10a of the compressor housing 10 at one end 51a and a second joint portion J2 joined to the outer peripheral surface 26a of the liquid receiver container 26 at another end 51b.

[0045] By overlapping one end 51a of the mounting piece 50A with the outer peripheral surface 10a of the compressor housing 10 and irradiating laser from the side of one end 51a toward the compressor housing 10 side, the resin-made mounting piece 50A is joined to the metal-made compressor housing 10. Similarly, by overlapping another end 51b of the mounting piece 50A with the outer peripheral surface 26a of the liquid receiver container 26 and irradiating laser from the side of another end 51b toward the liquid receiver container 26 side, the resin-made mounting piece 50A is joined to the metal-made liquid receiver container 26. That is to say, the first joint portion J1 and the second joint portion J2 form a joint portion J by irradiating laser from the resin material side toward the metal material side. In addition, the first joint portion J1 and the second joint portion J2 are formed, for example, in a strip shape extending in the vertical direction (axial direction of the rotating shaft 15) of the compressor housing 10.

[0046] In order to appropriately join one end 51a of the mounting piece 50A to the compressor housing 10 and another end 51b of the mounting piece 50A to the liquid receiver container 26 respectively by laser joining, as the resin material forming the mounting piece 50A, a thermoplastic resin material can be used, preferably a resin material having a functional group reactive with the metal material forming the compressor housing 10 and the liquid receiver container 26. As such a resin material, for example, polyamide (PA) and polybutylene terephthalate (PBT) can be used.

[0047] In addition, as the resin material for forming the mounting piece 50A, for example, super engineering plastics such as polyarylether nitrile (PEN) are preferably used. Thus, the mounting piece 50A can appropriately ensure the mechanical strength of the portions other than the first joint portion J1 and the second joint portion J2, as well as the heat resistance with respect to the compressor housing 10 and the liquid storage container 26.

[0048] In addition, as the resin material for forming the mounting piece 50A, in order to improve the vibration damping performance of the mounting piece 50A, a resin material containing a vibration damping agent can also be used. As such a vibration damping agent, for example, N-cyclohexyl-2-benzothiazole sulfenamide (DCHBSA), 2-mercaptobenzothiazole (MBT), etc. can be used.

[0049] It is sufficient that at least a part of the mounting piece 50A of the liquid receiver fixing bracket 50 is formed of a resin material. For example, one end portion 51a can be formed of a metal material, and the other end portion 51b can be formed of a resin material. In this case, the metal one end portion 51a and the resin the other end portion 51b can be integrally formed by insert molding, for example. For such a mounting piece 50A, the first joint portion J1 of one end portion 51a is joined by spot welding, and the second joint portion J2 of the other end portion 51b is joined by laser welding.

[0050] In addition, the other end portion 51b of the mounting piece 50A of the first embodiment has the second joint portion J2 joined to the liquid storage container 26 by laser welding, but is not limited to the structure having the second joint portion J2. Although not shown, the other end portion 51b of the mounting piece 50A can also hold the liquid storage container 26 using a fixing band, for example, instead of the second joint portion J2. In this case, the fixing band is installed along the circumferential direction of the liquid storage container 26, and both ends of the fixing band are respectively fixed to each of the other end portions 51b of a set of mounting pieces 50A (refer to Figure 5 ).

[0051] Effects of the First Embodiment

[0052] In the rotary compressor 1 of the first embodiment, the compressor housing 10 and the liquid storage container 26 are formed of a metal material, and at least a part of the liquid receiver fixing bracket 50 is formed of a resin material and has the first joint portion J1 joined to the outer peripheral surface 10a of the compressor housing 10. Generally, the longitudinal elastic modulus of the resin material is less than 1 / 100 of the longitudinal elastic modulus of the metal material, and it is less likely to transmit vibration compared to the metal material. Therefore, according to the first embodiment 1, in order to fix the liquid storage container 26 to the compressor housing 10, the liquid receiver fixing bracket 50 formed of a resin material with higher vibration damping performance can be adopted, which can suppress the generation of vibration of the rotary compressor 1 compared to the structure having a mounting part formed of a metal material, thereby reducing the noise generated along with the vibration.

[0053] The liquid reservoir fixing bracket 50 of Embodiment 1 may also be formed only of a resin material. In this case, the liquid reservoir fixing bracket 50 has a second engaging portion J2 that engages with the outer peripheral surface 26a of the liquid reservoir container 26. Thus, the liquid reservoir fixing bracket 50 can be formed only of a resin material with relatively high vibration damping performance, and can further suppress the generation of vibration by the rotary compressor 1, thereby further reducing the noise generated along with the vibration.

[0054] In addition, the liquid reservoir fixing bracket 50 of Embodiment 1 has a set of mounting pieces 50A. On each mounting piece 50A of the set of mounting pieces 50A, a first engaging portion J1 is provided at one end 51a, and a second engaging portion J2 is provided at the other end 51b. Thus, the first engaging portion J1 between the resin-made liquid reservoir fixing bracket 50 and the metal-made compressor housing 10, and the second engaging portion J2 between the resin-made liquid reservoir fixing bracket 50 and the metal-made liquid reservoir container 26 are appropriately ensured of the engaging strength of the first engaging portion J1 and the second engaging portion J2, for example, by laser bonding. Therefore, the mechanical strength of the mounting structure of the liquid reservoir 25 can be ensured.

[0055] Next, other embodiments will be described with reference to the drawings. The structure of the liquid reservoir fixing bracket of Embodiment 2 is different from that of Embodiment 1. Therefore, in Embodiment 2, the same reference numerals as those in Embodiment 1 are assigned to the same constituent components as those in Embodiment 1 and the description thereof is omitted, and the liquid reservoir fixing bracket will be described.

[0056] Embodiment 2

[0057] Figure 5 is a top view showing the main part of the rotary compressor of Embodiment 2. Figure 6 is a perspective view showing the liquid reservoir fixing bracket of the rotary compressor of Embodiment 2.

[0058] As Figure 5 and Figure 6 shown, the rotary compressor of Embodiment 2 includes a liquid reservoir fixing bracket 60 as a mounting member for fixing the liquid reservoir 25 to the compressor housing 10. The liquid reservoir fixing bracket 60 has: a first mounting piece 60A formed of a metal material, and a set of second mounting pieces 60B formed of a resin material. The first mounting piece 60A and the second mounting pieces 60B are integrally formed by insert molding, for example.

[0059] The first mounting piece 60A is formed in an arc shape with a cross-section curved along the outer peripheral surface 10a of the compressor housing 10. As the metal material for forming the first mounting piece 60A, for example, iron, copper, aluminum, etc. can be used. The first mounting piece 60A has a first engaging portion J1 that engages with the outer peripheral surface 10a of the compressor housing 10. The first engaging portion J1 is, for example, joined to the outer peripheral surface 10a of the compressor housing 10 by projection welding. Since the first engaging portion J1 is formed by welding metal materials to each other, the joining strength is improved compared to laser joining of metal materials and resin materials. In addition, as the first engaging portion J1, for example, spot welding can also be used for joining.

[0060] A set of second mounting pieces 60B are formed in the same shape only from a resin material. Each second mounting piece 60B has one end 61a connected to the first mounting piece 60A and the other end 61b that supports the accumulator 25, and is formed in an L-shaped cross-section where one end 61a intersects the other end 61b. Each second mounting piece 60B is connected to both circumferential ends of the first mounting piece 60A on the compressor housing 10.

[0061] As Figure 5 shown, the liquid storage container 26 is fixed to each of the other ends 61b of the set of second mounting pieces 60B by a fixing hoop 63. The fixing hoop 63 is installed along the circumferential direction of the liquid storage container 26, and both ends of the fixing hoop 63 are respectively fixed to each of the other ends 61b. As Figure 6 shown, a groove 64 for hooking one end 63a of the fixing hoop 63 is formed on the other end 61b of one second mounting piece 60B. A fixing hole 65 is formed on the other end 61b of the other second mounting piece 60B for fixing the other end 63b of the fixing hoop 63 by a screw 66 or the like. The fixing hoop 63 is formed of, for example, rubber or a steel plate.

[0062] As the resin material for forming the second mounting piece 60B, for example, a super engineering plastic such as polyarylether nitrile (PEN) is preferably used. Thus, the second mounting piece 60B can appropriately ensure the mechanical strength of the portion extending from the first mounting piece 60A and the heat resistance with respect to the compressor housing 10 and the liquid storage container 26.

[0063] In the present Embodiment 2, the liquid storage container 26 is fixed to the other end portion 61b of the second mounting piece 60B of the liquid storage device fixing bracket 60 using the fixing band 63 and the screw 66, but the structure is not limited to this. Although not shown, the other end portion 61b of the second mounting piece 60B may also have a second joint portion J2 joined to the outer peripheral surface 26a of the liquid storage container 26 by laser bonding. In this case, similar to the liquid storage device fixing bracket 50 of Embodiment 1, by overlapping the other end portion 61b of the second mounting piece 60B with the outer peripheral surface 26a of the liquid storage container 26 and irradiating laser from the other end portion 61b side to the liquid storage container 26 side, the resin-made second mounting piece 60B is joined to the metal-made liquid storage container 26.

[0064] Effect of Embodiment 2

[0065] According to the liquid storage device fixing bracket 60 of Embodiment 2, the metal-made first mounting piece 60A has the first joint portion J1, and the first joint portion J1 is joined to the outer peripheral surface 10a of the compressor housing 10 by welding. Therefore, compared with the liquid storage device fixing bracket 50 of Embodiment 1, the joining strength between the compressor housing 10 and the liquid storage device fixing bracket 60 can be improved. Further, in Embodiment 2, the liquid storage container 26 is supported by the second mounting piece 60B of the liquid storage device fixing bracket 60 using the fixing band 63 and the screw 66. Therefore, the process of laser bonding the second mounting piece 60B to the liquid storage container 26 can be omitted.

[0066] Similar to Embodiment 1, in Embodiment 2, in order to fix the liquid storage container 26 to the compressor housing 10, a liquid storage device fixing bracket 60 formed of a resin material having relatively high vibration damping performance for at least a part thereof can be adopted, and vibration of the rotary compressor 1 can be suppressed, thereby reducing noise generated along with the vibration.

[0067] Symbol Explanation

[0068] 1 Rotary compressor

[0069] 10 Compressor housing

[0070] 10a Outer peripheral surface

[0071] 11 Electric motor

[0072] 12 Compression part

[0073] 25 Liquid storage device

[0074] 26 Liquid storage container

[0075] 26a Outer peripheral surface

[0076] 50 Liquid storage device fixing bracket (mounting component)

[0077] 50A Mounting piece

[0078] 51a One end

[0079] 51b The other end

[0080] 60 Liquid reservoir fixing bracket (mounting part)

[0081] 60A First mounting piece

[0082] 60B Second mounting piece

[0083] 61a One end

[0084] 61b The other end

[0085] 105 Upper suction pipe (suction part)

[0086] 104 Lower suction pipe (suction part)

[0087] 107 Discharge pipe (discharge part)

[0088] J1 First joint

[0089] J2 Second joint

Claims

1. A rotary compressor, comprising: a compressor housing provided with a refrigerant discharge portion and a refrigerant suction portion; a compression portion disposed inside the compressor housing, compressing the refrigerant sucked from the suction portion and discharging it from the discharge portion; an electric motor disposed inside the compressor housing for driving the compression portion; a liquid receiver connected to the suction portion; and a mounting member for fixing the liquid receiver to the compressor housing, wherein the rotary compressor is characterized in that the compressor housing and the liquid storage container of the liquid receiver are formed of a metallic material, the mounting member is formed only of a resin material and has a set of mounting pieces independent of each other, each mounting piece of the set of mounting pieces is provided with a first joint portion welded to the outer peripheral surface of the compressor housing at one end and a second joint portion welded to the outer peripheral surface of the liquid storage container at the other end.

2. The rotary compressor according to claim 1, wherein the resin material is a thermoplastic resin material having a functional group reactive with the metallic material.

3. A rotary compressor, comprising: a compressor housing provided with a refrigerant discharge portion and a refrigerant suction portion; a compression portion disposed inside the compressor housing, compressing the refrigerant sucked from the suction portion and discharging it from the discharge portion; an electric motor disposed inside the compressor housing for driving the compression portion; a liquid receiver connected to the suction portion; and a mounting member for fixing the liquid receiver to the compressor housing, wherein the rotary compressor is characterized in that the compressor housing and the liquid storage container of the liquid receiver are formed of a metallic material, the mounting member has a first mounting piece formed of a metallic material and a second mounting piece formed of a resin material, and the first mounting piece and the second mounting piece are integrally formed, the first mounting piece has a first joint portion joined to the outer peripheral surface of the compressor housing, the second mounting piece has a second joint portion joined to the outer peripheral surface of the liquid storage container.

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