CN114776591A - Two-stage scroll compressor - Google Patents

Two-stage scroll compressor Download PDF

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Publication number
CN114776591A
CN114776591A CN202210522668.7A CN202210522668A CN114776591A CN 114776591 A CN114776591 A CN 114776591A CN 202210522668 A CN202210522668 A CN 202210522668A CN 114776591 A CN114776591 A CN 114776591A
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CN
China
Prior art keywords
scroll
main body
disk assembly
assembly
chamber
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Pending
Application number
CN202210522668.7A
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Chinese (zh)
Inventor
不公告发明人
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Chongqing Chaoli Hi Tech Co Ltd
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Chongqing Chaoli Hi Tech Co Ltd
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Priority to CN202210522668.7A priority Critical patent/CN114776591A/en
Publication of CN114776591A publication Critical patent/CN114776591A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/001—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
    • F04C18/0246—Details concerning the involute wraps or their base, e.g. geometry
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/008—Hermetic pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/02—Pumps characterised by combination with or adaptation to specific driving engines or motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/04—Heating; Cooling; Heat insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/06—Silencing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet

Abstract

The invention relates to the technical field of compression, in particular to a two-stage scroll compressor. The double-stage scroll compressor comprises a main body, a first scroll component, a second scroll component, a heat exchanger and a driving unit; the main body is provided with an inner cavity and a flow guide channel; the first scroll disk assembly, the second scroll disk assembly and the driving unit are accommodated in the inner cavity, and the driving unit is in transmission connection with the first scroll disk assembly and the second scroll disk assembly; two ends of the flow guide channel are respectively communicated with a refrigerant outlet of the first scroll disk assembly and a refrigerant inlet of the second scroll disk assembly; the heat exchanger is connected with the main body and positioned outside the main body, and the heat exchanger is used for exchanging heat with the refrigerant in the flow guide channel; the driving unit is in transmission connection with the first scroll disk assembly and the second scroll disk assembly. This doublestage scroll compressor adopts the two-stage compression, can guarantee to always press the ratio to keep unchangeable, through reducing single-stage pressure ratio, can reduce the gas force that moves vortex dish and receive moreover, and then reduces the moment of overturning, reduces compressor vibration and noise.

Description

Two-stage scroll compressor
Technical Field
The invention relates to the technical field of compression, in particular to a two-stage scroll compressor.
Background
The electric scroll compressor is a typical positive displacement compressor, has the advantages of simple structure, small volume, light weight and the like compared with other types of compressors, is a core device in a refrigeration system, and is widely applied to the automobile air conditioning industry at present. The main part of the scroll compressor is a scroll assembly which consists of a movable scroll plate and a fixed scroll plate. The movable scroll disk is eccentrically arranged and is mutually meshed with the fixed scroll disk, when the movable scroll disk performs plane circular motion under the drive of a motor shaft and the limitation of the rotation prevention mechanism, the closed volume formed by the movable scroll disk and the fixed scroll disk changes the volume of the closed volume while moving, so that the processes of air suction, compression and exhaust are completed.
Single-stage scroll compressors are well established and widely used in the industry, but there are some disadvantages to single-stage scroll compressors. Firstly, the single-stage compressor can obtain a limited low-temperature degree under the normal-temperature cooling condition, secondly, the single-stage compressor cannot be competent for the high-pressure ratio working condition, and if the pressure ratio is too high, the problems of volume efficiency reduction, power consumption increase, too high exhaust temperature, larger vibration and noise and the like can be caused. Secondly, in the heating condition, when the ambient temperature is low, the lubricating oil in the compressor is solidified, so that the compressor cannot be started or is difficult to start.
Disclosure of Invention
The invention aims to provide a two-stage scroll compressor, which adopts two-stage compression, can ensure that the total pressure ratio is kept unchanged, and can reduce the gas force applied to a movable scroll by reducing the pressure ratio of a single stage, thereby reducing the overturning moment and reducing the vibration and the noise of the compressor; in addition, interstage cooling can be performed on the refrigerant under the refrigerating working condition, so that the indicating work can be saved, the exhaust temperature can be reduced, the refrigerating capacity is improved, and the overall performance is improved; under the heating condition, refrigerant interstage heating is adopted, so that warming can be performed in a low-temperature environment, lubricating oil in the refrigerant interstage heating is melted, normal starting can be performed in the low-temperature environment, and the heating effect is guaranteed.
Embodiments of the invention may be implemented as follows:
the invention provides a two-stage scroll compressor, which comprises a main body, a first scroll disk assembly, a second scroll disk assembly, a heat exchanger and a driving unit, wherein the main body is provided with a first scroll disk and a second scroll disk;
the main body is provided with an inner cavity and a flow guide channel; the first scroll disk assembly, the second scroll disk assembly and the driving unit are contained in the inner cavity, and the driving unit is in transmission connection with the first scroll disk assembly and the second scroll disk assembly; two ends of the flow guide channel are respectively communicated with a refrigerant outlet of the first vortex disc assembly and a refrigerant inlet of the second vortex disc assembly;
the heat exchanger is connected with the main body and positioned outside the main body, and is used for exchanging heat with the refrigerant in the flow guide channel; the driving unit is in transmission connection with the first scroll disk assembly and the second scroll disk assembly.
In an alternative embodiment, the flow guide channel is opened on the side wall of the main body along the axis of the main body, and the first scroll disk assembly and the second scroll disk assembly are distributed at two ends of the main body.
In an optional embodiment, the heat exchanger is connected to the periphery of the side wall of the main body, where the flow guide channel is formed, and the length of the flow guide channel in the axial direction of the main body is greater than or equal to the length of the heat exchanger.
In an alternative embodiment, the heat exchanger is annularly arranged on the periphery of the main body around the axis of the main body, and the heat exchanger is used for exchanging heat with the refrigerant in the flow guide channel and the main body.
In an alternative embodiment, the first scroll assembly and the inner end surface of the body together define a first chamber and a second chamber; the first chamber is communicated with an external air inlet pipeline, communicated with a refrigerant inlet of the first scroll disk assembly, and communicated with a refrigerant outlet of the first scroll disk assembly;
the second scroll assembly and the inner end surface of the main body jointly define a third chamber and a fourth chamber; the third chamber is communicated with a refrigerant inlet of the second scroll disk assembly, the fourth chamber is communicated with a refrigerant outlet of the second scroll disk assembly, and the fourth chamber is communicated with an external exhaust pipeline;
two ends of the flow guide channel are respectively communicated with the second chamber and the third chamber.
In an optional embodiment, the main body is provided with an air inlet hole and an air outlet hole;
the air inlet hole is communicated with the first cavity and is used for being in butt joint with an external air inlet pipeline; the exhaust hole is communicated with the fourth cavity and is used for being in butt joint with an external exhaust pipeline.
In an alternative embodiment, the air intake holes are located at the outer periphery of the main body and the air exhaust holes are located at the end of the main body.
In an alternative embodiment, the driving unit includes a motor disposed between the first scroll assembly and the second scroll assembly, and the motor is in driving connection with the first scroll assembly and the second scroll assembly.
In an alternative embodiment, the heat exchanger is annularly arranged on the periphery of the main body around the axis of the main body, and the heat exchanger is used for exchanging heat with the refrigerant and the motor in the flow guide channel and the main body.
In an alternative embodiment, the flow-directing channels are located at the periphery of the motor.
The embodiment of the invention has the beneficial effects that:
the dual stage scroll compressor includes a main body, a first scroll assembly, a second scroll assembly, a heat exchanger, and a driving unit; the main body is provided with an inner cavity and a flow guide channel; the first scroll disk assembly, the second scroll disk assembly and the driving unit are contained in the inner cavity, and the driving unit is in transmission connection with the first scroll disk assembly and the second scroll disk assembly; two ends of the flow guide channel are respectively communicated with a refrigerant outlet of the first scroll disk assembly and a refrigerant inlet of the second scroll disk assembly; the heat exchanger is connected with the main body and positioned outside the main body, and the heat exchanger is used for exchanging heat with the refrigerant in the flow guide channel; the driving unit is in transmission connection with the first scroll disk assembly and the second scroll disk assembly.
The two-stage scroll compressor adopts two-stage compression, can ensure that the total pressure ratio is kept unchanged, and can reduce the gas force borne by the movable scroll disc by reducing the single-stage pressure ratio, thereby reducing the overturning moment and reducing the vibration and noise of the compressor; besides, interstage cooling can be performed on the refrigerant under the refrigerating working condition, indicating work can be saved, exhaust temperature can be reduced, refrigerating capacity is improved, and overall performance is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
FIG. 1 is a schematic view of a two-stage scroll compressor according to an embodiment of the present invention;
fig. 2 is a refrigerant compression flow chart of the two-stage scroll compressor according to the embodiment of the present invention.
Icon: 200-a two-stage scroll compressor; 210-a body; 220-a first scroll assembly; 230-a second scroll assembly; 240-a drive unit; 250-a heat exchanger; 211-lumen; 212-a flow guide channel; 213-a first chamber; 214-a second chamber; 215-a third chamber; 216-a fourth chamber; 217-inlet holes; 218-vent hole; 241-motor.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
Referring to fig. 1 and 2, the present embodiment provides a dual-stage scroll compressor 200, wherein the dual-stage scroll compressor 200 includes a main body 210, a first scroll assembly 220, a second scroll assembly 230, a heat exchanger 250 and a driving unit 240;
the main body 210 is provided with an inner cavity 211 and a flow guide channel 212; the first scroll assembly 220, the second scroll assembly 230 and the driving unit 240 are accommodated in the inner cavity 211, and the driving unit 240 is in transmission connection with the first scroll assembly 220 and the second scroll assembly 230; both ends of the guide passage 212 are respectively communicated with a refrigerant outlet of the first scroll assembly 220 and a refrigerant inlet of the second scroll assembly 230;
the heat exchanger 250 is connected to the main body 210 and located outside the main body 210, and the heat exchanger 250 is used for exchanging heat with the refrigerant in the diversion channel 212; the driving unit 240 is drivingly connected to the first scroll assembly 220 and the second scroll assembly 230.
The working principle of the two-stage scroll compressor 200 is as follows:
referring to fig. 1 and 2, the dual scroll compressor 200 includes a main body 210, a first scroll assembly 220, a second scroll assembly 230, a heat exchanger 250, and a driving unit 240; the driving unit 240 is in transmission connection with the first scroll assembly 220 and the second scroll assembly 230, that is, the two-stage scroll compressor 200 adopts two-stage compression, which can ensure that the total pressure ratio is kept unchanged, and can reduce the gas force on the movable scroll by reducing the pressure ratio of the single stage, thereby reducing the overturning moment and reducing the vibration and noise of the compressor;
the main body 210 is provided with an inner cavity 211 and a flow guide channel 212; the first scroll assembly 220, the second scroll assembly 230 and the driving unit 240 are accommodated in the inner cavity 211, and the driving unit 240 is in transmission connection with the first scroll assembly 220 and the second scroll assembly 230; both ends of the guide passage 212 are respectively communicated with a refrigerant outlet of the first scroll assembly 220 and a refrigerant inlet of the second scroll assembly 230; the heat exchanger 250 is connected with the main body 210 and located outside the main body 210, and the heat exchanger 250 is used for exchanging heat with the refrigerant in the diversion channel 212; therefore, interstage cooling can be performed on the refrigerant through the arrangement of the flow guide channel 212 and the heat exchanger 250, so that the indicating work can be saved, the exhaust temperature can be reduced, the refrigerating capacity is improved, and the overall performance is improved.
Referring to fig. 1 and 2, in the present embodiment, when the fluid guide channel 212 is disposed, the fluid guide channel 212 is opened on a sidewall of the main body 210 along an axis of the main body 210, and the first scroll assembly 220 and the second scroll assembly 230 are disposed at two ends of the main body 210. In other embodiments of the present invention, the flow guide channel 212 may also be a flow guide pipe, and the flow guide channel 212 may be disposed in the main body 210 and attached to the inner wall of the main body 210 according to the position of the heat exchanger 250.
When the heat exchanger 250 is arranged, the heat exchanger 250 is used for exchanging heat with the refrigerant in the diversion channel 212, so that interstage cooling can be performed on the refrigerant under a refrigeration working condition, indicating work can be saved, exhaust temperature can be reduced, refrigeration capacity is improved, and overall performance is improved; therefore, the heat exchanger 250 is connected to the outer circumference of the side wall of the main body 210 where the flow guide channel 212 is opened, and the length of the flow guide channel 212 is greater than or equal to the length of the heat exchanger 250 along the axial direction of the main body 210.
Further, referring to fig. 1 and 2, in the present embodiment, when the heat exchanger 250 is disposed, the heat exchanger 250 is annularly disposed on the outer periphery of the main body 210 around the axis of the main body 210, and the heat exchanger 250 is used for exchanging heat with the refrigerant in the diversion channel 212 and with the main body 210. The purpose of the arrangement is to enable the heat exchanger 250 to exchange heat with the refrigerant in the main body 210 and the diversion channel 212, so that interstage cooling can be performed on the refrigerant under the refrigeration working condition through the arrangement, thereby saving indication work, reducing exhaust temperature, improving refrigeration capacity and improving overall performance; under the heating condition, inter-stage heating of the refrigerant and heating of the main body 210 can be adopted, so that warming can be performed in a low-temperature environment, lubricating oil in the main body is melted, normal starting can be performed in the low-temperature environment, and the heating effect is guaranteed. In this configuration, the heat exchanger 250 can exchange heat with the refrigerant in the main body 210 and the refrigerant in the guide passage 212, so that heat in the main body 210 and heat in the refrigerant in the guide passage 212 can be conducted out through the heat exchanger 250, and the heat in the main body 210 may be heat generated during operation of the first scroll assembly 220, the second scroll assembly 230, and the driving unit 240.
Further, referring to fig. 1 and 2, in the present embodiment, the first scroll assembly 220 and the inner end surface of the main body 210 jointly define a first chamber 213 and a second chamber 214; the first chamber 213 is used for being communicated with an external air inlet pipeline, the first chamber 213 is communicated with a refrigerant inlet of the first scroll plate assembly 220, and the second chamber 214 is communicated with a refrigerant outlet of the first scroll plate assembly 220;
second scroll assembly 230 defines third chamber 215 and fourth chamber 216 with the inner end face of body 210; the third chamber 215 is communicated with a refrigerant inlet of the second scroll assembly 230, the fourth chamber 216 is communicated with a refrigerant outlet of the second scroll assembly 230, and the fourth chamber 216 is used for being communicated with an external exhaust pipeline;
two ends of the flow guide channel 212 are respectively communicated with the second chamber 214 and the third chamber 215.
It should be noted that, because the pressures in the first chamber 213, the second chamber 214, the third chamber 215 and the fourth chamber 216 are different, when the first scroll assembly 220 and the second scroll assembly 230 are installed, corresponding sealing elements are further disposed at the joints of the first scroll assembly 220 and the second scroll assembly 230 on the main body 210, so that the first chamber 213, the second chamber 214, the third chamber 215 and the fourth chamber 216 are independent from each other, the sealing performance of the first chamber 213, the second chamber 214, the third chamber 215 and the fourth chamber 216 is improved, and the occurrence of series flow is avoided.
Moreover, the main body 210 is opened with an air inlet 217 and an air outlet 218; the air inlet hole 217 is communicated with the first chamber 213, and the air inlet hole 217 is used for being butted with an external air inlet pipeline; the vent hole 218 communicates with the fourth chamber 216, and the vent hole 218 is used for interfacing with an external exhaust line. And, the intake holes 217 are located at the outer circumference of the main body 210, and the exhaust holes 218 are located at the end of the main body 210.
When the driving unit 240 is provided, the driving unit 240 includes a motor 241, the motor 241 is located between the first scroll assembly 220 and the second scroll assembly 230, and the motor 241 is in driving connection with the first scroll assembly 220 and the second scroll assembly 230. It should be noted that the first scroll assembly 220 and the second scroll assembly 230 share one motor 241 and a main shaft, that is, a double-shaft structure is adopted. When the heat exchanger 250 is disposed, the heat exchanger 250 is disposed around the outer circumference of the main body 210 in a ring shape around the axis of the main body 210, and the heat exchanger 250 exchanges heat with the refrigerant in the guide passage 212, the motor 241, and the main body 210. And, the guide passage 212 is located at the outer circumference of the motor 241.
In summary, referring to fig. 1 and 2, the arrows in fig. 2 indicate the flowing direction of the refrigerant, and the compression flow of the refrigerant in the two-stage scroll compressor 200 is as follows:
a refrigerant enters the first chamber 213 through an inlet hole 217 via an external inlet pipe, and enters the first scroll assembly 220 from a refrigerant inlet of the first scroll assembly 220;
under the driving action of the motor 241, the first scroll assembly 220 and the second scroll assembly 230 start to work; a refrigerant in the first scroll assembly 220 is compressed and introduced into the second chamber 214 after being compressed, thereby completing a first stage of compression;
then, the refrigerant in the second chamber 214 enters the diversion channel 212 and is guided into the third chamber 215; when the refrigerant compressed in the first stage flows through the flow guide channel 212, the refrigerant is cooled under the action of the heat exchanger 250, so that the temperature of the refrigerant is reduced, the volume of the refrigerant is reduced, and the compression work of the next stage is reduced;
a refrigerant in the third chamber 215 enters the second scroll assembly 230 from a refrigerant inlet of the second scroll assembly 230;
under the driving action of the motor 241, the refrigerant in the second scroll assembly 230 is compressed and guided into the fourth chamber 216 after being compressed, thereby completing the second stage of compression;
the refrigerant in the fourth chamber 216 is discharged through the discharge hole 218.
As can be seen from the above flow, the refrigerant in the first chamber 213 is not compressed, and thus is in a low-pressure state; the refrigerants in the second chamber 214 and the third chamber 215 are compressed by the first stage, so that the refrigerants are in a medium-high pressure state; the refrigerant in the fourth chamber 216 is compressed in two stages, and thus is in a high pressure state. In the above process, the heat exchanger 250 is also used for exchanging heat with the main body 210 and the motor 241, so that the main body 210 and the motor 241 can be cooled and simultaneously radiated, thereby preventing the operating temperatures of the main body 210 and the motor 241 from rising to abnormal temperatures.
Besides, the content is a compression process in a refrigeration state; in the heating state, the heat exchanger 250 is also used for heating the main body 210, and the purpose of the heat exchanger is to heat the lubricating oil in the two-stage scroll compressor 200, so that the two-stage scroll compressor 200 is warmed up, the lubricating oil therein is melted, and the two-stage scroll compressor can be normally started in a low-temperature environment to ensure a heating effect.
The two-stage scroll compressor 200 has the following advantages:
the structure is simple, and a double-extension shaft structure with one shaft provided with two discs is adopted;
the heat exchanger 250 is arranged outside the main body 210, the heat exchanger 250 can cool the refrigerant in the diversion channel 212 during cooling, and can heat the refrigerant in the main body 210 and the main body 210 during heating, so that the overall performance of the compressor is improved;
the double-stage compression type compressor is provided with two sets of dynamic and static vortex disc structures, double-stage compression is realized, the single-stage pressure ratio of the compressor is reduced, and the vibration and the noise of the compressor can be effectively reduced.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A two-stage scroll compressor, comprising:
the dual-stage scroll compressor includes a main body, a first scroll assembly, a second scroll assembly, a heat exchanger, and a drive unit;
the main body is provided with an inner cavity and a flow guide channel; the first scroll disk assembly, the second scroll disk assembly and the driving unit are accommodated in the inner cavity, and the driving unit is in transmission connection with the first scroll disk assembly and the second scroll disk assembly; two ends of the flow guide channel are respectively communicated with a refrigerant outlet of the first vortex disc assembly and a refrigerant inlet of the second vortex disc assembly;
the heat exchanger is connected with the main body and positioned outside the main body, and the heat exchanger is used for exchanging heat with the refrigerant in the flow guide channel; the driving unit is in transmission connection with the first scroll assembly and the second scroll assembly.
2. The two-stage scroll compressor of claim 1, wherein:
the flow guide channel is arranged on the side wall of the main body along the axis of the main body, and the first scroll disk assembly and the second scroll disk assembly are distributed at two ends of the main body.
3. The two-stage scroll compressor of claim 2, wherein:
the heat exchanger is connected to the periphery of the side wall of the main body, wherein the side wall of the flow guide channel is formed in the main body, and the length of the flow guide channel in the axis direction of the main body is larger than or equal to that of the heat exchanger.
4. The two-stage scroll compressor of claim 2, wherein:
the heat exchanger is annularly arranged on the periphery of the main body around the axis of the main body, and the heat exchanger is used for exchanging heat with the refrigerant in the flow guide channel and the main body.
5. The two-stage scroll compressor of any one of claims 1-4, wherein:
the first scroll assembly and the inner end surface of the body together define a first chamber and a second chamber; the first chamber is communicated with an external air inlet pipeline, communicated with a refrigerant inlet of the first scroll disk assembly, and communicated with a refrigerant outlet of the first scroll disk assembly;
the second scroll assembly and the inner end surface of the body together define a third chamber and a fourth chamber; the third chamber is communicated with a refrigerant inlet of the second scroll disk assembly, the fourth chamber is communicated with a refrigerant outlet of the second scroll disk assembly, and the fourth chamber is communicated with an external exhaust pipeline;
and two ends of the flow guide channel are respectively communicated with the second chamber and the third chamber.
6. The two-stage scroll compressor of claim 5, wherein:
the main body is provided with an air inlet and an air outlet;
the air inlet hole is communicated with the first chamber and is used for being in butt joint with the external air inlet pipeline; the exhaust hole is communicated with the fourth cavity and is used for being in butt joint with the external exhaust pipeline.
7. The two-stage scroll compressor of claim 6, wherein:
the air inlet hole is located at the periphery of the main body, and the exhaust hole is located at the end part of the main body.
8. The two-stage scroll compressor of any one of claims 1-4, wherein:
the driving unit comprises a motor, the motor is located between the first scroll disk assembly and the second scroll disk assembly, and the motor is in transmission connection with the first scroll disk assembly and the second scroll disk assembly.
9. The two-stage scroll compressor of claim 8, wherein:
the heat exchanger is annularly arranged on the periphery of the main body around the axis of the main body, and the heat exchanger is used for exchanging heat with the refrigerant in the flow guide channel, the motor and the main body.
10. The two-stage scroll compressor of claim 8, wherein:
the flow guide channel is positioned on the periphery of the motor.
CN202210522668.7A 2022-05-13 2022-05-13 Two-stage scroll compressor Pending CN114776591A (en)

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000356193A (en) * 1999-06-11 2000-12-26 Tokico Ltd Scroll type fluid machine
US20010043878A1 (en) * 2000-03-31 2001-11-22 Sullivan Timothy J. Involute spiral wrap device
WO2003069130A1 (en) * 2002-02-15 2003-08-21 Korea Institute Of Machinery & Materials Scroll-type expander having heating structure and scroll-type heat exchange system employing the expander
JP2004116471A (en) * 2002-09-27 2004-04-15 Tokico Ltd Scroll type fluid machine
CN1637234A (en) * 2003-12-26 2005-07-13 株式会社日立制作所 Scroll type fluid machinery
CN206592283U (en) * 2017-02-15 2017-10-27 深圳麦克维尔空调有限公司 A kind of screw compressor
CN109555686A (en) * 2018-12-10 2019-04-02 魏莉 Interior water cooling multi-stage compression oil-free scroll air compressor machine
CN110657095A (en) * 2019-10-31 2020-01-07 蔡彪 Scroll compressor with air preheating effect
CN113123967A (en) * 2019-12-31 2021-07-16 比亚迪股份有限公司 Scroll type two-stage compressor and vehicle with same
US20220018348A1 (en) * 2019-02-14 2022-01-20 Mitsubishi Electric Corporation Scroll compressor

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000356193A (en) * 1999-06-11 2000-12-26 Tokico Ltd Scroll type fluid machine
US20010043878A1 (en) * 2000-03-31 2001-11-22 Sullivan Timothy J. Involute spiral wrap device
WO2003069130A1 (en) * 2002-02-15 2003-08-21 Korea Institute Of Machinery & Materials Scroll-type expander having heating structure and scroll-type heat exchange system employing the expander
JP2004116471A (en) * 2002-09-27 2004-04-15 Tokico Ltd Scroll type fluid machine
CN1637234A (en) * 2003-12-26 2005-07-13 株式会社日立制作所 Scroll type fluid machinery
CN206592283U (en) * 2017-02-15 2017-10-27 深圳麦克维尔空调有限公司 A kind of screw compressor
CN109555686A (en) * 2018-12-10 2019-04-02 魏莉 Interior water cooling multi-stage compression oil-free scroll air compressor machine
US20220018348A1 (en) * 2019-02-14 2022-01-20 Mitsubishi Electric Corporation Scroll compressor
CN110657095A (en) * 2019-10-31 2020-01-07 蔡彪 Scroll compressor with air preheating effect
CN113123967A (en) * 2019-12-31 2021-07-16 比亚迪股份有限公司 Scroll type two-stage compressor and vehicle with same

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