TW202212698A - Compressor and compressor system - Google Patents

Abstract

A compressor according to one embodiment comprises: a discharge valve; a discharge space formed downstream of the discharge valve; a liquid injection port for injecting a refrigerant liquid into the discharge space; and a heat medium flow path positioned on a side opposite the discharge space with a dividing wall that forms the discharge space interposed therebetween.

Description

Compressors and compressor systems

The present disclosure relates to a compressor and a compressor system.

In the compressor, if the compressor is overheated by the compressed high-temperature and high-pressure gas, the density of the compressed gas sucked by the compressor decreases, which is the cause of the decrease in the compressor efficiency. Therefore, for example, in a reciprocating compressor (reciprocating compressor), as a mechanism for suppressing overheating of the compressor, piping for flowing cooling water is provided inside the crankcase or the top cover. For example, Patent Documents 1 and 2 disclose a configuration in which overheating is suppressed by spraying refrigerant liquid into the ejection space in the top cover, and cooling the compressed ejection gas with the latent heat of evaporation of the refrigerant. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2010-53765 [Patent Document 2] Japanese Patent Laid-Open No. 2011-163192

[Problems to be Solved by Invention]

According to the structures disclosed in Patent Documents 1 and 2, the ejected gas can be cooled, and the overheating of the compressor can be suppressed. However, due to the influence of cooling, there is a possibility that a large amount of frost may be generated on the surface of the compressor (such as the surface of the top cover or the casing). Such a composition that produces a large amount of frost is not good.

The present disclosure has been made in view of the above-mentioned problems, and its object is to suppress the generation of frost on the surface of the compressor when the refrigerant liquid is sprayed into the discharge space of the compressor to cool the compressed discharge gas. [Technical means to solve problems]

In order to achieve the above object, the compressor of the present disclosure includes: a discharge valve; a discharge space formed on the downstream side of the discharge valve; a liquid injection hole for injecting refrigerant liquid into the discharge space; and a heat medium flow path It is located on the opposite side of the said ejection space through the partition wall which forms the said ejection space.

Moreover, the compressor system of this disclosure is a compressor system provided with a low-stage compression part and a high-stage compression part, and at least the said low-stage compression part is comprised by the compressor of the said description. Here, the "low-stage compression part" and the "high-stage compression part" include a low-stage compressor and a high-stage compressor having independent casings, for example, as shown in a reciprocating compressor, which are housed in one housing case Middle and low stage compressors and high stage compressors. [Effect of invention]

According to the compressor and the compressor system of the present disclosure, by providing the heat medium flow path, the temperature of the casing of the compressor including the partition wall forming the ejection space can be raised, so that the generation of frost on the surface of the compressor can be suppressed.

Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, and relative arrangements of the components described in the embodiments or shown in the drawings are merely illustrative examples, and are not intended to limit the scope of the present invention. For example, expressions such as "in a certain direction", "along a certain direction", "parallel", "orthogonal", "center", "concentric" or "coaxial" indicating a relative or absolute arrangement do not strictly mean such Disposition also means the state of relative displacement by angle or distance with tolerance or degree of obtaining the same function. For example, "identical", "equal", "uniform", etc. express the state that things are equal not only strictly express the state of equality, but also express the state of the existence of tolerance or difference in the degree of obtaining the same function. For example, the expression indicating a shape such as a quadrilateral shape or a cylindrical shape not only refers to a geometrically strict shape such as a quadrilateral shape or a cylindrical shape, but also refers to a shape including a concave and convex portion, a chamfered portion, and the like within a range in which the same effect is obtained. . On the other hand, the expression "equipped", "has", "has", "includes" or "includes" a constituent element is not a mutually exclusive expression that excludes the existence of other constituent elements.

1 and 2 are a front cross-sectional view showing a compressor 10 according to an embodiment and a system diagram of a lubricating oil supply system. In FIGS. 1 and 2 , the compressor 10 is, for example, a compressor that is incorporated into a refrigerating apparatus or the like to compress a refrigerant gas. The compressor 10 includes a discharge valve 12 , and a discharge space Sv is formed on the downstream side of the discharge valve 12 . The compressor casing 16 is formed with a liquid injection hole 14 for injecting the refrigerant liquid into the discharge space Sv. In the present embodiment, as in Patent Documents 1 and 2, the condensed liquid of the refrigerant gas, which is the compressed gas, is injected into the discharge space Sv from the liquid injection hole 14 . The condensate evaporates in the high-temperature ejection space Sv, absorbs the latent heat of evaporation from the ejected gas Gv, and cools the ejected gas Gv. Thereby, overheating of the ejected gas Gv can be suppressed. However, as described above, there is a possibility that frost may be generated on the surface of the casing 18 forming the ejection space Sv.

Therefore, in order to suppress the generation of frost on the casing 18, the compressor 10 includes a heat medium flow path 20 located on the opposite side of the discharge space Sv via the partition wall 18a forming the discharge space Sv. Since the heat medium flows through the heat medium flow path 20 , the temperature of the case 18 including the partition wall 18 a is increased, so that the generation of frost on the surface of the case 18 can be suppressed.

In one embodiment, the compressor 10 includes the lubricating oil flow path 22 in which the lubricating oil r supplied to the lubricated portion flows. The heat medium flow paths 20 are provided in series or in parallel with respect to the lubricating oil flow paths 22 . According to this embodiment, the lubricating oil r can flow through the heat medium flow path 20, the lubricating oil lubricates and cools the lubricated part in the compressor 10, and absorbs the heat of the lubricated part, so the lubricating oil r can flow through the lubricating oil r. Holding the heat, the casing 18 including the partition wall 18a forming the ejection space Sv is heated up. Thereby, generation of frost on the surface of the casing 18 of the compressor 10 can be suppressed. The lubricated portion of the compressor 10 includes, as an example, at least one of a rotary body and a rotary body support portion. As a more specific example, the lubricated parts are the crankshaft 48 and the thrust bearing 50 which will be described later. The lubricated portion may be either the crankshaft 48 or the thrust bearing 50 .

In one embodiment, as shown in FIG. 2 , the heat medium flow path 20 is arranged in series with respect to the lubricating oil flow path 22 to form the lubricating oil including the lubricated part of the compressor 10 , the heat medium flow path 20 and the lubricating oil flow path 22 Circular path 24 of r. Moreover, in the circulation path 24, the oil pump 26 which circulates the lubricating oil r is provided. According to this embodiment, since the lubricating oil r circulated in the circulation path 24 by the oil pump 26 is cooled in the heat medium flow path 20, a dedicated oil cooler is not required, and the cost can be reduced.

FIG. 3 shows an embodiment in which the heat medium flow path 20 is provided in parallel with the circulation path 24 . In this embodiment, an oil cooler 28 is provided in the circulation path 24 of the lubricating oil flowing through the lubricated portion of the compressor 10 . The lubricating oil r flowing through the circulation path 24 flows through the lubricated portion of the compressor 10 , is cooled and warmed by the lubricated portion, and is cooled by the oil cooler 28 . Furthermore, the compressor 10 is provided with a branch path 30 that branches from the circulation path 24, communicates with the heat medium flow path 20, and merges with the circulation path 24 again. The lubricating oil r flowing through the branch passage 30 exchanges heat with the ejection gas Gv in the heat medium flow path 20, and heats the ejection gas Gv. According to this embodiment, generation of frost on the surface of the partition wall 18a or the casing 18 including the partition wall 18a can be suppressed by heating the ejected gas Gv by the heat medium flow path 20 . On the other hand, the main role of cooling the lubricating oil r is performed by the oil cooler 28 .

As shown in FIG. 3 , flow control valves 32 and 34 may be provided in the circulation path 24 and the branch path 30 , respectively. In addition, only one of the flow rate adjustment valve 32 and the flow rate adjustment valve 34 may be provided. By providing these flow control valves 32 and 34, the flow rate of the lubricating oil r flowing through the branch path 30 can be adjusted, so that the heating performance of the heat medium flow path 20 can be suppressed. In addition, it is preferable that the branching part and the junction part of the branch path 30 with respect to the circulation path 24 are arranged so that lubricating oil r of a temperature suitable for the heating condition of the heat medium flow path 20 flows through the heat medium flow path 20 .

In one embodiment, as shown in FIGS. 1 and 2 , the compressor 10 is a reciprocating compressor. In this case, the compressor 10 is configured such that the cylinder 40 is accommodated in the compressor casing 16 , and the piston 42 reciprocates inside the cylinder 40 . On one end side of the cylinder 40 (the upper end of the cylinder 40 in the figure), a valve plate 44 for supporting the discharge valve 12 is provided, and a top cover serving as the casing 18 including the partition wall 18a forming the discharge space Sv is provided. According to the compressor 10 which is such a reciprocating compressor, since the heat medium flowing through the heat medium flow path 20 serving as the top cover of the casing 18 can be heated up, the generation of frost on the surface of the top cover can be suppressed. In addition, in the present embodiment, the casing 18 of the compressor 10 is the top cover, but the casing 18 is not limited to the top cover. Hereinafter, the case 18 may be referred to as the top cover 18 .

Furthermore, as shown in FIGS. 1 and 2 , a crank case 46 is provided in the lower part of the compressor casing 16 . In the crankcase 46 , the crankshaft 48 is supported via a thrust bearing 50 . An oil storage space Os for the lubricating oil r is formed at the bottom of the crankcase 46 . The piston 42 is connected to the crankshaft 48 via the connecting rod 52 , and the piston 42 reciprocates inside the cylinder 40 by the rotation of the crankshaft 48 . In the exemplary embodiment shown in FIG. 1 and FIG. 2 , two cylinders 40 are arranged in parallel, and the pistons 42 of the two cylinders 40 are connected to the crankshaft in such a way as to reciprocate the crankshaft 48 in such a way that the rotation angle of the crankshaft 48 differs by 180°. 48. Furthermore, on the outer side of the crankcase 46 and at one end of the crankshaft 48, a motor 54 for rotationally driving the crankshaft 48 is provided. An oil pump 26 is provided at the other end of the crankshaft 48 , and the oil pump 26 is actuated by the rotation of the crankshaft 48 .

As shown in FIG. 2 , an oil filter 56 is provided in the oil accumulation room Os, and the lubricating oil r is sucked up from the oil accumulation room Os to the lubricating oil flow path 22 by the oil pump 26 . The oil pressure of the lubricating oil r flowing through the circulation passage 24 is adjusted by the pressure regulating valve 58 provided at the end of the lubricating oil passage 22 . Oil passages 60 and 62 are formed in lubricated parts such as the crankshaft 48 and the thrust bearing 50 . The lubricating oil r ejected from the oil pump 26 to the lubricating oil flow path 22 is supplied to these oil paths. As shown in FIG. 2 , a portion of the oil passage 60 is guided to the piston 42 via the crank pin 53 . In addition, the lubricating oil r is supplied from the lubricating oil flow path 22 to the heat medium flow path 20 to warm the ejected gas Gv. The lubricating oil r passing through the heat medium flow path 20 is returned to the oil storage room Os through the oil paths 60 and 62 and the like. In this way, the above-mentioned circulation path 24 of the lubricating oil r is formed.

As shown in FIG. 1, a suction space Si is formed on the outside of the cylinder 40. When the piston 42 descends, the compression space in the cylinder 40 is decompressed, and the compressed gas, that is, the refrigerant gas, is sucked into the cylinder 40 from the suction space Si through the suction valve 63. compressed space within. The refrigerant gas sucked into the compression space is compressed in the compression space, and is ejected toward the ejection space Sv. The disc-shaped valve box 66 is pressed against the upper surface of the valve plate 44 by the coil spring 64 and fixed, so that the opening of the valve plate 44 is shielded. The frustoconical valve plate 70 is coupled to the lower surface of the valve box 66 by means of bolts 68 . A discharge gas passage is formed on the valve plate 66, and the discharge valve 12 is attached. When the piston 42 rises and the air pressure in the cylinder chamber increases, the discharge valve 12 is pushed up, and the refrigerant gas is discharged to the discharge gas passage.

In one embodiment, as shown in FIGS. 1 and 2 , the compressor 10 includes a coolant flow path 72 for cooling the compressor driving motor 54 . The coolant flow path 72 communicates with the heat medium flow path 20 . In this embodiment, since the liquid coolant that cools the motor 54 and is sucked into the motor 54 and retains the heat flows through the heat medium flow path 20, the shell including the partition wall 18a that forms the ejection space Sv can be separated by the retained heat of the coolant. Since the temperature of the body 18 is increased, the generation of frost on the surface of the casing 18 of the compressor 10 can be suppressed.

Furthermore, as another embodiment, for example, warm water or antifreeze used as cooling fluid in other parts of the compressor 10 may be supplied to the heat medium flow path 20 to heat the discharge space Sv.

In one embodiment, as shown in FIG. 1 , a cover 74 having a heat medium introduction space inside is provided on the outer surface of the top cover serving as the casing 18 . The heat medium introduction space forms the heat medium flow path 20 . According to this embodiment, since the heat medium flow path 20 can be formed only by attaching the cover 74 to the existing compressor, and other parts need not be modified, the heat medium flow path 20 can be easily formed.

In the exemplary embodiment shown in FIG. 1, an inlet hole 74a and an outlet hole 74b of the heat medium flow path 20 are formed in the cover 74, and the lubricating oil flow path 22 is connected to the inlet hole 74a and the outlet hole 74b, respectively. In this way, the lubricating oil r is supplied to the heat medium introduction space (heat medium flow path 20 ) from the inlet hole 74a, and is discharged to the lubricating oil flow path 22 from the outlet hole 74b. As shown in FIG. 1 , the inlet hole 74a and the outlet hole 74b are respectively formed at two end portions of the sleeve cover 74 which are separated from each other. Thereby, the residence time of the lubricating oil r in the heat medium introduction space can be prolonged, and the heat exchange rate with the ejection gas Gv can be improved.

In one embodiment, as shown in FIG. 1, the liquid injection hole 14 for injecting the refrigerant liquid into the discharge space Sv includes: a through hole 14a formed in the valve plate 44; and a communication hole 14b formed in the compressor casing The wall portion of the body 16 is used to communicate with the through hole 14a, so that the through hole 14a communicates with the external space. As will be described later, in the heat pump device including the compressor 10 , the communication hole 14b is connected to the refrigerant passage 76 branched from the outlet side refrigerant passage of the receiver 88 , and the refrigerant liquid is supplied from the refrigerant passage 76 to the liquid injection hole 14 .

In one embodiment, as shown in FIG. 1 , one end of the through hole 14a is opened to the ejection space Sv, and the other end of the through hole 14a is formed so as to communicate with the communication hole 14b.

According to this embodiment, the liquid injection hole 14 can be formed at a position avoiding the top cover 18 . On the top cover 18 side, a heat medium flow path 20 needs to be provided. When the liquid injection hole 14 is provided on the top cover 18 side, the arrangement positions of the two interfere with each other. In the present embodiment, since the liquid injection hole 14 can be formed at a position avoiding the valve plate 44 side of the top cover 18, a layout of the liquid injection hole 14 that can avoid interference with the heat medium flow path 20 can be realized.

In addition, in the exemplary embodiment shown in FIG. 1 , the communication hole 14 b is formed in a part of the compressor casing 16 , that is, the upper end of the casing surrounding the cylinder 40 . On the other hand, the communication hole 14b may also be formed in the valve plate 44 . In addition, the installation position of the liquid injection hole 14 is not limited to the above-mentioned embodiment, and may be formed in other positions, such as the top cover 18 .

In one embodiment, as shown in FIG. 1 , the outer peripheral edge portion of the valve plate 44 is interposed between the compressor casing 16 and the outer peripheral edge portion of the top cover 18 . In this way, when the outer peripheral edge portion of the valve plate 44 is disposed in a state of being exposed to the external space of the compressor 10 , the processing for opening the liquid injection hole 14 to the external space of the compressor 10 becomes easy. Furthermore, as shown in FIG. 1 , since the compressor casing 16 , the valve plate 44 and the outer peripheral edge portion of the top cover 18 are laminated in three layers, the outer peripheral edge portions of the three layers can be easily fastened together with the bolts 78 . Solid combination. Thereby, the installation of the valve plate 44 becomes easy.

In one embodiment, the compressor system 80 shown in FIG. 4 is a two-stage compressor system including a low-stage compressor 82 and a high-stage compressor 84, and uses a refrigerant gas as a compressed gas, and the low-stage compressor 82 uses the above-mentioned The compressor 10 of the embodiment is constituted. Since the low-stage compressor 82 is constituted by the compressor 10, in the low-stage compressor 82, the generation of frost on the surface of the casing 18 including the partition wall forming the discharge space can be suppressed.

The low stage compressor 82 and the high stage compressor 84 of the exemplary compressor system 80 shown in FIG. 4 are configured as reciprocating compressors. A liquid receiver 88 is installed in the refrigerant circulation path 86, and the refrigerant liquid in the liquid receiver 88 is decompressed by the expansion valve 90 through the refrigerant circulation path 86, and the evaporator 92 absorbs the latent heat of evaporation from the load and evaporates. The refrigerant gas evaporated by the evaporator 92 is sucked into the suction chamber 94 of the low-stage compressor 82, and then sucked into the cylinder 98 through the suction valve 96 and compressed.

The refrigerant gas compressed by the cylinder 98 is ejected to the ejection chamber 102 via the ejection valve 100 , and then ejected from the ejection chamber 102 to the refrigerant circulation path 86 . The refrigerant gas ejected to the refrigerant circulation path 86 is separated from the lubricating oil by the oil separator 104 , and then sucked into the suction chamber 94 of the high-stage compressor 84 . The refrigerant gas sucked into the suction chamber 94 of the high-stage compressor 84 is further sucked into the cylinder 98 through the suction valve 96 and compressed, and then discharged from the discharge chamber 102 to the refrigerant circulation path 86 . The refrigerant gas ejected to the refrigerant circulation path 86 is separated from the lubricating oil by the oil separator 104 , and then cooled by the condenser 106 to be liquefied.

A branch path 108 branched from the refrigerant circulation path 86 is provided on the downstream side of the liquid receiver 88 , and a liquid pump 110 and a pressure regulating valve 112 are provided in the branch path 108 . The branch circuit 108 is connected to the discharge chamber 102 of the high-stage compressor 84, and the refrigerant liquid is pressurized to a higher pressure in the discharge chamber 102 of the higher-stage compressor 84 by the rotation number control of the oil pump 26 and the pressure control of the pressure regulating valve 112. And it is sprayed into the inside of the spray chamber 102 from the spray nozzle 114 provided in the spray chamber 102 . The ejected refrigerant liquid evaporates under the temperature and pressure conditions of the ejection chamber 102 to cool the ejection space.

Furthermore, the refrigerant circulation path 86 is provided with a branch path 116 branched from the refrigerant circulation path 86 at a position on the downstream side of the branch path 108 . The branch path 116 is connected to the injection nozzle 114 provided on the inner wall surface of the discharge chamber 102 of the low-stage compressor 82 . Since the discharge chamber 102 of the low-stage compressor 82 has a lower pressure than the branch path 116 , it is not necessary to pressurize the refrigerant liquid, and the pressure can be directly supplied to the discharge chamber 102 . The discharge chamber 102 of the low-stage compressor 82 is cooled by evaporating the refrigerant liquid sprayed from the spray nozzle 114 under the temperature and pressure conditions of the discharge chamber 102 . In this embodiment, since the low-stage compressor 82 is constituted by the compressor 10 of the above-described embodiments, the generation of frost on the surface of the casing (top cover) 18 of the compressor 10 can be suppressed.

In addition, in the compressor system 80 shown in FIG. 4 , the low-stage compressor 82 and the high-stage compressor 84 can also be formed in one casing, and a single-stage two-stage low-stage compressor and a high-stage compressor are accommodated. compressor. For example, in the compressor 10 shown in FIG. 1 , a compressor system in which the cylinder 40 on one side is a low-stage compressor and the cylinder on the other side is a high-stage compressor can also be configured.

The content described in each of the above-mentioned embodiments is grasped in the following manner, for example.

1) A compressor (10) in one aspect includes: a discharge valve (12); a discharge space (Sv) formed on the downstream side of the discharge valve; and a liquid injection hole (14) for injecting the discharge space into the discharge space A refrigerant liquid; and a heat medium flow path (20) located on the opposite side of the ejection space through a partition wall (18a) forming the ejection space.

According to such a configuration, by providing the heat medium flow path, the temperature of the compressor casing including the partition wall forming the ejection space can be raised, so that the generation of frost on the surface of the compressor can be suppressed.

2) The compressor of another aspect is the compressor described in 1), which is provided with: a lubricating oil flow path (22) in which the lubricating oil (r) supplied to the lubricated part of the above-mentioned compressor flows; The media flow path (20) is arranged in series or in parallel with respect to the lubricating oil flow path (22).

According to this configuration, since the lubricating oil for lubricating the lubricated part of the compressor and absorbing the heat of the lubricating part can flow through the heat medium flow path, the heat retention of the lubricating oil can form the discharge space. The dividing wall heats up. Thereby, the generation of frost in the compressor casing including the partition wall can be suppressed.

3) A compressor according to another aspect is the compressor according to 2), which is provided with an oil pump (26) for forming an oil pump (26) including the lubricated portion, the lubricating oil flow path (22), and the heat medium flow path. In the form of the lubricating oil circulation path (24), the heat medium flow path is arranged in series with respect to the lubricating oil flow path, and the lubricating oil is circulated in the circulation path.

According to this configuration, since the lubricating oil flowing through the lubricating oil circulation path exchanges heat with the ejection gas in the heat medium flow path, and is cooled by the ejection gas, the heat medium flow path replaces the oil cooler. Therefore, there is no need for a dedicated oil cooler, and the cost can be reduced.

4) A compressor of still another aspect is the compressor according to any one of 1) to 3), comprising: a compressor driving motor (54); and a coolant flow path (72) for cooling The compressor driving motor; and the coolant flow path communicates with the heat medium flow path (20).

According to such a configuration, since the coolant for cooling the compressor drive motor flows through the heat medium flow path, the heat retention of the coolant which cools the compressor drive motor and absorbs the heat can be included in the formation of ejection. The compressor casing of the partition wall of the space is heated up, so that frost can be prevented from being generated on the surface of the compressor.

5) A compressor according to another aspect is the compressor according to any one of 1) to 4), comprising: a compressor casing (16); a cylinder (40) provided in the compressor casing; A piston (42), which reciprocates inside the cylinder; a valve plate (44), which is arranged on one end side of the cylinder to support the ejection valve; and a top cover (18), which includes a space for forming the ejection space. The above-mentioned partition wall (18a).

According to this configuration, since the heat medium flowing through the heat medium flow path can raise the temperature of the top cover, generation of frost on the surface of the top cover can be suppressed.

6) The compressor of another aspect is the compressor described in 5), comprising: a cover (74) provided on the outer surface of the top cover, and having a heat medium introduction space inside; and the heat medium introduction space The space forms the above-mentioned heat medium flow path (20).

According to such a configuration, since the above-mentioned cover is installed in the existing compressor, the heat medium flow path can be formed without modification of other parts, so that the heat medium flow path can be easily formed.

7) The compressor of another aspect is the compressor according to 5) or 6), wherein the liquid injection hole (14) includes: a through hole (14a) formed in the valve plate (44); and a communication hole (14b), which is provided on the wall of the compressor casing (16) to communicate with the through hole (14a), so that the through hole (14a) communicates with the external space.

According to this structure, the heat medium flow path needs to be provided on the top cover side, and the liquid injection hole is formed on the valve plate side instead of the top cover side, so that interference with the heat medium flow path can be avoided, and the layout of the injection hole can be realized.

8) A compressor according to another aspect is the compressor according to any one of 5) to 7), wherein the outer peripheral edge portion of the valve plate (44) is interposed between the compressor casing (16) and the above-mentioned compressor. Between the outer peripheral edge of the top cover (18).

According to such a configuration, the valve plate can be easily installed by fastening the compressor casing, the valve plate, and the outer peripheral edge portion of the top cover together with fasteners such as bolts. In addition, since the end face of the outer peripheral edge portion of the valve plate is exposed to the external space, it is easy to form a liquid injection hole which communicates the discharge space and the external space.

9) The compressor system (80) of one aspect is a compressor system (80) having a low-stage compression part (82) and a high-stage compression part (84), and at least the low-stage compression part (82) is composed of 5) to 8) The compressor (10) described in any one of the configurations.

According to such a configuration, since at least the low-stage compression part is constituted by the compressor of each embodiment, the generation of frost on the compressor surface can be suppressed in the low-stage compression part.

10: Compressor 12: Discharge valve 14: Liquid injection hole 14a: Through hole 14b: Connecting hole 16: Compressor housing 18: Shell (top cover) 18a: Partition wall (partition wall forming ejection space) 20: Hot media stream 22: Lubricating oil flow path 24: Circular Road 26: Oil pump 28: Oil cooler 30: Branch Road 32: Flow adjustment valve 34: Flow adjustment valve 40: Cylinder 42: Pistons 44: valve plate 46: Crankcase 48: Crankshaft 50: Thrust bearing 52: connecting rod 53: Crank pin 54: Motor for compressor drive 56: Oil filter 58: Pressure regulating valve 60: oil circuit 62: oil circuit 63: Suction valve 64: Coil Spring 66: Valve box 68: Bolts 70: valve plate 72: Coolant flow path 74: Cover 74a: Entry hole 74b: Exit hole 76: Refrigerant road 78: Bolts 80: Compressor system 82: Low stage compressor 84: High stage compressor 86: Refrigerant circulation circuit 88: Receiver 90: Expansion valve 92: Evaporator 94: Inhalation Chamber 96: Suction valve 98: Cylinder 100: Discharge valve 102: Ejection chamber 104: Oil separator 106: Condenser 108: Branch Road 110: Liquid pump 112: Pressure regulating valve 114: jet nozzle 116: Branch Road Gv: spew gas Os: Oil accumulation room r: lubricating oil Si: inhalation space Sv: Squirting Space

Fig. 1 is a front sectional view of a reciprocating compressor according to an embodiment. FIG. 2 is a system diagram showing a lubricating oil supply system of the reciprocating compressor according to one embodiment. Fig. 3 is a system diagram showing a lubricating oil supply system of the reciprocating compressor according to one embodiment. Fig. 4 is a system diagram of a compressor system according to an embodiment.

10: Compressor

12: Discharge valve

14: Liquid injection hole

14a: Through hole

14b: Connecting hole

16: Compressor housing

18: Shell (top cover)

18a: Partition wall (partition wall forming ejection space)

20: Hot media stream

22: Lubricating oil flow path

24: Circular Road

26: Oil pump

40: Cylinder

42: Pistons

44: valve plate

46: Crankcase

48: Crankshaft

50: Thrust bearing

52: connecting rod

53: Crank pin

54: Motor for compressor drive

56: Oil filter

58: Pressure regulating valve

60: oil circuit

62: oil circuit

63: Suction valve

64: Coil Spring

66: Valve box

68: Bolts

70: valve plate

72: Coolant flow path

74: Cover

74a: Entry hole

74b: Exit hole

76: Refrigerant road

78: Bolts

Gv: spew gas

r: lubricating oil

Si: inhalation space

Sv: Squirting Space

Claims (9)

A compressor having: ejection valve; an ejection space, which is formed on the downstream side of the ejection valve; a liquid injection hole for injecting refrigerant liquid into the above-mentioned ejection space; and The heat medium flow path is located on the opposite side of the ejection space across the partition wall forming the ejection space. Such as the compressor of claim 1, it has: a lubricating oil flow path through which the lubricating oil supplied to the lubricated portion of the compressor described above flows; and The heat medium flow path is provided in series or in parallel with the lubricating oil flow path. Such as the compressor of claim 2, it has: an oil pump, wherein the heat medium flow path is arranged in series with respect to the lubricating oil flow path so as to form the lubricating oil circulation path including the lubricated portion, the lubricating oil flow path, and the heat medium flow path; The above-mentioned lubricating oil is circulated in the above-mentioned circulation passage. The compressor of any one of claims 1 to 3, having: motors for compressor drives; and a coolant flow path for cooling the compressor driving motor; and The coolant flow path communicates with the heat medium flow path. The compressor of any one of claims 1 to 3, having: compressor housing; a cylinder, which is arranged in the above-mentioned compressor casing; a piston, which reciprocates inside the aforementioned cylinder; a valve plate, which is arranged on one end side of the above-mentioned cylinder to support the above-mentioned discharge valve; and A top cover includes the partition wall forming the ejection space. Such as the compressor of claim 5, it has: a cover, which is arranged on the outer surface of the top cover, and has a heat medium introduction space inside; and The heat medium introduction space forms the heat medium flow path. The compressor of claim 5, wherein said liquid injection hole comprises: a through hole formed in the valve plate; and A communication hole is provided on the wall portion of the compressor casing, and is used to communicate with the through hole, so that the through hole communicates with the external space. The compressor of claim 5, wherein The outer peripheral edge portion of the valve plate is interposed between the compressor casing and the outer peripheral edge portion of the top cover. A compressor system having: low stage compression section; and a high-stage compression section; and At least the above-mentioned low-stage compression section is constituted by the compressor of any one of claims 5 to 8.

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