Compressor

Abstract

The utility model discloses a compressor, relates to the technical field of refrigeration, and solves the problem of cooling capacity waste caused by cooling interference of a motor in a compressor in the prior art. The compressor comprises a shell, and a first-stage compression cavity, a transition cavity and a second-stage compression cavity which are sequentially communicated are formed in the shell. The compressor further comprises a first-stage impeller, a second-stage impeller and a motor assembly, the first-stage impeller is arranged in the first-stage compression cavity, the second-stage impeller is arranged in the second-stage compression cavity, the motor assembly is arranged in the transition cavity, the motor assembly is in transmission connection with the first-stage impeller, and the motor assembly is in transmission connection with the second-stage impeller.

Description

TECHNICAL FIELD

[0001] The utility model relates to refrigeration technical field especially relates to a compressor. BACKGROUND

[0002] The power source of the compressor is provided by the motor, in order to effectively control the heat generated by the motor in the operation process, ensure that the motor works at the appropriate temperature, thereby improving the efficiency and reliability of the motor, the related technology will be through the circulating cooling liquid to absorb the heat generated by the motor, and take it away, prevent the motor from overheating.

[0003] And in the above process, because the circulating cooling liquid reduces the temperature of the motor, the motor outer surface in contact with the outside world will appear condensation phenomenon, in other words, the motor in this case is cooled too much, resulting in surplus of cold and waste.

[0004] In order to solve the above technical problem, the related technology will adopt the means of adding heat insulation cotton on the surface of the motor, which will increase the labor cost and increase the consumables of the compressor, and the technical problem of waste of cold has not been improved. INVENTION CONTENTS

[0005] The embodiment of the utility model provides a kind of compressor, solve the problem of excessive cooling of motor in the compressor in prior art and the waste of cold.

[0006] To achieve the above purpose, the embodiment of the utility model adopts the following technical scheme:

[0007] According to the first aspect of the present application, a kind of compressor is provided, and the compressor includes a shell, and the shell forms sequentially communicating primary compression chamber, transition chamber and secondary compression chamber.

[0008] The compressor in the application further includes a primary impeller, a secondary impeller and a motor assembly, the primary impeller is arranged in the primary compression chamber, the secondary impeller is arranged in the secondary compression chamber, and the motor assembly is arranged in the transition chamber. The motor assembly is in driving connection with the primary impeller, and the motor assembly is in driving connection with the secondary impeller.

[0009] In the structure of the compressor of the present application, the special position relationship of the transition chamber connecting the primary compression chamber and the secondary compression chamber is utilized. On the one hand, when the motor temperature is higher than the gas in the primary compression chamber, the heat generated by the motor in the operation process can be taken away by the gas from the primary compression chamber and the gas flowing to the secondary compression chamber.

[0010] On the other hand, when the motor temperature is lower than or equal to the gas in the primary compression chamber, when the temperature of the motor is in a state lower than the temperature of the gas in the primary compression chamber, the temperature difference between the motor and the gas in the primary compression chamber during operation is in a relatively small range compared with the case of direct contact of the motor with the outside air. This makes the gas in the primary compression chamber not cause the motor shell to condense water condensation, in other words, the motor does not fall into the bad state of overcooling. Thus, the compressor in the application effectively avoids the problem of unnecessary waste of cold due to motor overcooling, thereby improving the energy utilization efficiency and operation stability of the entire compressor.

[0011] In some embodiments, the motor assembly comprises a shell, which is spaced apart from the casing to form a cooling flow channel, one end of the cooling flow channel being communicated with the primary compression chamber, and the other end of the cooling flow channel being communicated with the secondary compression chamber.

[0012] In some embodiments, the transition chamber is arranged around the periphery of the shell.

[0013] In some embodiments, the compressor in the application further comprises a liquid cooling assembly, which comprises at least one liquid delivery pipe, the liquid delivery pipe penetrating the casing and the shell in sequence, and the liquid delivery pipe being used to deliver cooling liquid to the inside of the shell.

[0014] In some embodiments, the motor assembly comprises an output shaft, a first bearing and a second bearing, one end of the output shaft being drivingly connected with the primary impeller, the other end of the output shaft being drivingly connected with the secondary impeller, the first bearing being arranged at one end of the output shaft towards the primary impeller, and the first bearing being fixed in the casing, the first bearing being provided with a first liquid cooling flow channel; the second bearing being arranged at one end of the output shaft towards the secondary impeller, and the second bearing being fixed in the casing, the second bearing being provided with a second liquid cooling flow channel.

[0015] In some embodiments, the liquid cooling assembly comprises a first liquid delivery pipe and a second liquid delivery pipe, one end of the first liquid delivery pipe penetrating the casing and the shell in sequence and being communicated with the first liquid cooling flow channel, and one end of the second liquid delivery pipe penetrating the casing and the shell in sequence and being communicated with the second liquid cooling flow channel.

[0016] In some embodiments, the shell forms a first chamber, a second chamber and a third chamber, the first bearing being arranged between the first chamber and the second chamber, the second bearing being arranged between the second chamber and the third chamber, and the compressor further comprises a wire protection pipe, one end of the wire protection pipe penetrating the casing and the shell in sequence and being communicated with the third chamber.

[0017] In some embodiments, the output shaft comprises a first connecting portion, a main body portion and a second connecting portion connected in sequence, the first connecting portion being drivingly connected with the primary impeller, the second connecting portion being drivingly connected with the secondary impeller, the first connecting portion being arranged in the first chamber, the main body portion being arranged in the second chamber, and the second connecting portion being arranged in the third chamber.

[0018] In some embodiments, the first bearing is a ceramic hydrodynamic bearing; and / or, the second bearing is a ceramic hydrodynamic bearing.

[0019] According to a second aspect of the present application, a compressor is provided, the compressor in the present application comprises a shell, a primary impeller and a secondary impeller, the shell forms a primary compression chamber, a transition chamber and a secondary compression chamber which are communicated in sequence, the primary impeller is arranged in the primary compression chamber, the secondary impeller is arranged in the secondary compression chamber, a motor assembly is arranged in the transition chamber, the motor assembly is in driving connection with the primary impeller, and the motor assembly is in driving connection with the secondary impeller, and the shell and the motor assembly are arranged in a spaced manner along the radial direction of the shell.

[0020] It should be noted that the technical effects brought by the implementation manners of the second aspect can refer to the technical effects brought by the corresponding implementation manners in the first aspect, which will not be described here again. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 FIG. 1 is a schematic diagram of heat transfer of a refrigeration system in an embodiment of the present application;

[0022] Figure 2 FIG. 2 is a schematic diagram of a structure of a compressor in an embodiment of the present application;

[0023] Figure 3 FIG. 3 is a schematic diagram of a structure of a compressor in an embodiment of the present application;

[0024] Figure 4 FIG. 4 is a schematic diagram of a structure of a compressor in an embodiment of the present application;

[0025] Figure 5 FIG. 5 is a schematic diagram of a structure of a compressor in an embodiment of the present application;

[0026] Figure 6 FIG. 6 is a schematic diagram of a structure of a compressor in an embodiment of the present application;

[0027] Figure 7 FIG. 7 is a schematic diagram of a structure of a compressor in an embodiment of the present application;

[0028] Figure 8 FIG. 8 is a schematic diagram of a structure of a compressor in an embodiment of the present application;

[0029] Figure 9 FIG. 9 is a line graph of refrigeration efficiency in an embodiment of the present application;

[0030] Figure 10 FIG. 10 is a schematic diagram of a structure of a compressor in an embodiment of the present application;

[0031] Figure 11 FIG. 11 is a schematic diagram of a structure of a compressor in an embodiment of the present application;

[0032] Figure 12 Fig. 10 is a schematic view of a structure of a compressor in an embodiment of the present application.

[0033] Reference signs:

[0034] 000, compressor; 100, housing; 101, primary compression chamber; 102, secondary compression chamber; 103, transition chamber; 104, primary impeller; 105, secondary impeller; 106, first liquid delivery pipe; 107, second liquid delivery pipe; 108, output shaft; 1081, first bearing; 1082, first cooling liquid passage; 1083, second bearing; 1084, second cooling liquid passage; 1085, main body portion; 110, wire protection tube; 200, motor assembly; 201, housing; 2, condenser; 3, evaporator; 4, economizer. DETAILED DESCRIPTION

[0035] The embodiments of the present application will be described in detail below with reference to the drawings.

[0036] In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0037] The terms "first", "second", "third", etc. are only used for descriptive purpose and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0038] In the description of the present application, it is to be understood that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between the two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, when describing pipelines or channels, the terms "connected" and "connected" used in the present application have the meaning of conducting. The specific meaning needs to be understood in combination with the context.

[0039] In the present embodiments, the word "exemplary" or "for example" is used to mean "an example of" or "an example, only. Any embodiment or design solution described as "exemplary" or "for example" in the present embodiments should not be construed as being more advantageous or preferred than other embodiments or design solutions. In fact, a word or phrase such as "exemplary" or "for example" is used in the present embodiments to present one or more related concepts in a concrete manner.

[0040] The compressor 000 is a driven fluid machine that lifts low-pressure gas to high-pressure gas, mainly based on mechanical movement to compress gas to increase its pressure.

[0041] In some embodiments, referring to Figure 1 and in combination with Figure 2 , the present application provides a compressor 000, which compresses low-temperature and low-pressure refrigerant vapor into a high-temperature and high-pressure state in a refrigeration system, and then delivers it to a condenser 2 to dissipate heat, and then passes through an expansion valve to reduce pressure into an evaporator 3 to absorb heat, completing a refrigeration cycle.

[0042] In some embodiments, referring to Figure 2 , the compressor 000 in the present application also includes a motor assembly 200, which converts electrical energy into mechanical energy, which is used to compress gas to increase the pressure and temperature of the refrigeration gas.

[0043] In some embodiments, referring to Figure 2 and in combination with Figure 10 , the compressor 000 in the present application includes an air inlet and an air outlet, and the compressor 000 sucks in low-pressure refrigerant gas through the air inlet, at which time the gas pressure is low and the temperature is relatively low. The motor assembly 200 drives the compressor 000 to compress the sucked gas, and the volume of the gas decreases, and the pressure and temperature increase, so that it becomes high-temperature and high-pressure gas.

[0044] Exemplarily, the air inlet is provided in the primary compression chamber 101.

[0045] In some embodiments, referring to Figure 1 and in combination with Figure 2 , the refrigeration system in which the compressor 000 in the present application is located also includes an evaporator 3, and the outlet of the evaporator 3 is directly connected to the air suction port of the compressor 000 through a suction pipe. In the evaporator 3, the refrigerant liquid evaporates and absorbs heat to become low-temperature and low-pressure gaseous refrigerant, which is then sucked into the compressor 000 through the suction pipe.

[0046] In some embodiments, referring to Figure 1 and in combination with Figure 2The refrigeration system in which the compressor 000 is located in the present application also includes a condenser 2. After the compressor 000 compresses the low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure gaseous refrigerant, it is transported to the condenser 2 through the exhaust pipeline. In the condenser 2, the refrigerant exchanges heat with the external cooling medium, releases heat and gradually condenses into high-pressure liquid refrigerant.

[0047] In some embodiments, referring to Figure 1 and in combination with Figure 2 The refrigeration system in which the compressor 000 is located in the present application also includes an economizer 4. A part of the high-pressure refrigerant liquid from the condenser 2 will pass through the economizer 4 for further throttling, pressure reduction and flash heat absorption process to improve the energy efficiency of the refrigeration system. The condenser 2 releases heat from the refrigerant to the external environment, and the evaporator 3 absorbs heat from the cooled medium, and there is a heat transfer and balance relationship between the two. The economizer 4 makes the refrigerant entering the evaporator 3 have lower temperature and pressure through the throttling, pressure reduction and flash heat absorption process, thereby improving the refrigeration capacity of the evaporator 3. At the same time, the flash process of the refrigerant in the economizer 4 absorbs part of the heat, which comes from the refrigerant liquid at the outlet of the condenser 2, so that the refrigerant liquid at the outlet of the condenser 2 is further supercooled, improving the energy efficiency of the refrigeration system.

[0048] In the refrigeration system, referring to Figure 1 and in combination with Figure 2 The compressor 000 first compresses the inhaled low-temperature and low-pressure refrigerant gas into a high-temperature and high-pressure state, giving the initial power to the refrigerant circulating flow; then, the high-temperature and high-pressure refrigerant gas flows into the condenser 2, fully exchanges heat with the external cooling medium, releases a large amount of heat and condenses into high-pressure liquid; subsequently, part of the high-pressure liquid flows into the economizer 4, which cleverly improves the refrigeration potential of the refrigerant and optimizes the system energy efficiency through the unique processes of throttling, pressure reduction and flash heat absorption; finally, the treated refrigerant liquid or the liquid directly from the condenser 2 enters the evaporator 3, absorbs the heat of the cooled medium in the evaporator 3 and then evaporates into low-pressure and low-temperature refrigerant gas, which is then inhaled by the compressor 000 again.

[0049] In this way, the condenser 2, the economizer 4, the evaporator 3 and the compressor 000 closely cooperate and are connected with each other, which together ensures the stable and efficient operation of the refrigeration system. The performance fluctuation of any component will affect the entire refrigeration system, and will have a significant impact on the refrigeration effect, energy efficiency and operation stability of the entire refrigeration system.

[0050] In some embodiments, referring to Figure 2 and in combination with Figure 3The compressor 000 in the present application comprises a shell 100, which forms a primary compression chamber, a transition chamber 103 and a secondary compression chamber in sequence.

[0051] Exemplarily, the suction port is arranged in the primary compression chamber, and the exhaust port is arranged in the secondary compression chamber.

[0052] When the motor assembly 200 is working, first, low-pressure gaseous refrigerant is sucked into the primary compression chamber. With the working of the motor assembly 200, the low-pressure gaseous refrigerant is preliminarily compressed in the primary compression chamber, so that its pressure and temperature are increased, and the primary compression process is completed. Then, the refrigerant after the primary compression enters the transition chamber 103, where the refrigerant is buffered on one hand and is prepared for the secondary compression on the other hand. Then, the refrigerant enters the secondary compression chamber, and is further compressed to a higher pressure and temperature under the action of the secondary compression component, and is finally discharged from the compressor 000 in the form of high-temperature and high-pressure gas, so as to provide power for the subsequent refrigeration cycle and ensure that the entire refrigeration system can stably and efficiently operate to meet the refrigeration requirements in different scenarios.

[0053] In some embodiments, referring to Figure 2 and combining Figure 3 The compressor 000 in the present application comprises a primary impeller 104, the motor assembly 200 is in transmission connection with the primary impeller 104, and the primary impeller 104 is arranged in the primary compression chamber.

[0054] When the compressor 000 starts to operate, the motor assembly 200 drives the primary impeller 104 to rotate at a high speed. The blades of the primary impeller 104 generate strong centrifugal force and pushing force on the low-pressure gaseous refrigerant entering the primary compression chamber, so that the refrigerant moves at a high speed, the distance between the molecules of the refrigerant is rapidly reduced, and thus the preliminary compression of the refrigerant is realized, the pressure and temperature of the refrigerant are increased to a relatively high level, a foundation for further compression in the secondary compression chamber is laid, and thus the entire compressor 000 can be efficiently and stably operated to meet the strict requirements of the refrigeration system on the compression of the refrigerant and to improve the overall performance and reliability of the system.

[0055] In some embodiments, referring to Figure 3 and combining Figure 4 The compressor 000 in the present application comprises a secondary impeller 105 (see Figure 2 ), the motor assembly 200 is in transmission connection with the secondary impeller 105, and the secondary impeller 105 is arranged in the secondary compression chamber.

[0056] When the refrigerant after the primary compression chamber is preliminarily compressed enters the secondary compression chamber, the secondary impeller 105 is driven to rotate rapidly by the transmission device. The high-speed rotation of the secondary impeller 105 causes the refrigerant entering the action range thereof to be subjected to a strong force again, and the gas molecules of the refrigerant are further pressed, so that the pressure and temperature of the refrigerant are further significantly increased to reach a higher pressure and temperature condition required by the refrigeration cycle.

[0057] On the basis of the above, the motor assembly 200 in the present application is arranged in the transition chamber 103. When the motor temperature is higher than the gas temperature of the primary compression chamber, the gas from the primary compression chamber and the gas during the flow to the secondary compression chamber can carry away the heat generated by the motor operation in time during the operation of the compressor 000, so as to ensure that the motor is in a suitable working temperature range and prevent the performance and service life from being affected due to overheating.

[0058] On the contrary, when the motor temperature is lower than or equal to the gas temperature of the primary compression chamber, the temperature difference between the motor and the gas of the primary compression chamber is very small compared with the conventional case in which the motor directly contacts the external air. In this way, the gas of the primary compression chamber will not condense on the surface of the motor shell 201, which means that the motor will not be excessively cooled, and unnecessary loss of cold energy caused by excessive cooling is effectively prevented.

[0059] In some embodiments, the shell 100 and the motor assembly 200 are spaced apart along the radial direction of the shell 100, so that the gas compressed by the compression chambers can flow on the surface of the motor assembly 200.

[0060] In some embodiments, the motor assembly 200 includes a shell 201, and the shell 201 and the shell 100 are spaced apart to form a cooling flow channel. One end of the cooling flow channel towards the primary impeller 104 is in communication with the primary compression chamber 101, and the other end of the cooling flow channel towards the secondary impeller 105 is in communication with the secondary compression chamber 102.

[0061] When the compressor 000 is working, the refrigerant gas in the primary compression chamber and the secondary compression chamber is in different pressure and temperature states and is in a flow state. Since the cooling flow channel is in communication with the primary compression chamber and the secondary compression chamber respectively, the refrigerant gas will naturally form an air flow circulation in the cooling flow channel under the action of the pressure difference.

[0062] The heat generated by the motor assembly 200 during operation will be transferred to the shell 201, and the refrigerant gas in the cooling flow channel will flow continuously to carry away the heat on the shell 201, so as to achieve the cooling of the motor assembly 200.

[0063] By using the gas in the compression chamber to exchange heat with the motor assembly 200 in the cooling flow channel, the cooling process of the motor assembly 200 is more accurate and moderate, avoiding excessive cooling, that is, not falling into the undesirable state of overcooling. This not only helps to maintain the stable performance of the motor, but also prevents energy waste caused by excessive cooling, improving the energy utilization efficiency of the entire compressor 000 system.

[0064] In some embodiments, the transition chamber 103 is arranged around the periphery of the shell 201 and can absorb heat generated by the operation of the motor assembly 200 from all directions. No matter where the heat is generated, it can be quickly absorbed by the gas in the transition chamber 103, achieving omnidirectional heat capture and avoiding local overheating. This makes the heat distribution around the motor more uniform, avoiding the phenomenon of local high temperature caused by heat concentration on one side. This helps to improve the overall heat dissipation effect of the motor, ensures the relative stability of the temperature of each part of the motor, reduces thermal stress and deformation caused by uneven temperature, and prolongs the service life of the motor.

[0065] In addition, when the temperature of the motor assembly 200 is low, the transition chamber 103 surrounds the periphery of the shell 201, so that the gas from the primary compression chamber can flow more uniformly around the motor shell 201, so that they are in sufficient contact and exchange heat uniformly to avoid the situation that the heat exchange between the motor assembly 200 and the primary compression chamber is insufficient and the local temperature difference is large.

[0066] In some embodiments, the compressor 000 in the present application further comprises a liquid cooling assembly, which comprises at least one liquid delivery pipe that penetrates the shell 100 and the shell 201 in sequence. The liquid delivery pipe is used to deliver cooling liquid to the inside of the shell 201.

[0067] When the compressor 000 is in operation, the cooling liquid flows stably into the inside of the shell 201 under the action of pressure difference or pumping device. The cooling liquid can efficiently absorb the heat generated during the operation of the motor due to its high specific heat capacity, thereby effectively controlling the temperature rise of the motor.

[0068] At the same time, after the liquid delivery pipe delivers the cooling liquid to the motor assembly 200, the temperature of the motor assembly 200 decreases. It should be noted that even if the temperature of the refrigerant gas in the primary compression chamber rises, the temperature difference between the two is not large in actual application, so that the temperature difference between the two sides of the shell 100 of the motor assembly 200 is always within a suitable temperature range, and the condensate water does not appear on the shell 201 of the motor.

[0069] In some embodiments, referring to Figure 5 The compressor in the present application can reduce the temperature of the primary exhaust gas, thereby improving the compression efficiency of the two-stage compressor.

[0070] Exemplarily, the liquid supply of the infusion tube in the application can reach a pressure difference of 100 KPa or more, and the flow rate is 10 L / min or more, which is sufficient to meet the cooling capacity of the first-stage exhaust.

[0071] In some embodiments, the motor assembly 200 includes an output shaft 108, one end of which is in driving connection with the first-stage impeller 104, and the other end is in driving connection with the second-stage impeller 105. When the motor assembly 200 starts to operate, the power generated by the motor assembly 200 is transmitted through the output shaft 108. The output shaft 108 conducts the power to the first-stage impeller 104, driving the first-stage impeller 104 to rotate at high speed in the first-stage compression chamber, so that the low-pressure gaseous refrigerant entering the first-stage compression chamber is compressed under the action of the first-stage impeller 104, and the pressure and temperature are preliminarily increased.

[0072] In some embodiments, the motor assembly 200 includes a first bearing 1081, which is arranged at the end of the output shaft 108 towards the first-stage impeller 104, and is fixed in the housing 100. The first bearing 1081 is provided with a first liquid cooling flow channel.

[0073] On the one hand, the first bearing 1081 is cooled by the first liquid cooling flow channel, which can effectively reduce the temperature of the bearing, avoid problems such as failure of the lubricating grease of the bearing, aggravation of the wear of the parts, etc. caused by long-time high-temperature operation. The normal performance of the lubricating grease can be maintained, which can ensure that the rotation of the first bearing 1081 is smoother, reduce the frictional resistance, and thus prolong the service life of the first bearing 1081, reduce the compressor 000 downtime maintenance caused by bearing failure, and improve the reliability and stability of the compressor 000 operation.

[0074] On the other hand, precise temperature control is also of great significance to the entire compressor 000 system. The stable temperature of the bearing helps the output shaft 108 to maintain stable rotating speed and rotating precision, ensures that the output shaft 108 can accurately transmit power to the first-stage impeller 104, guarantees the compression work of the first-stage impeller 104 to be carried out as expected, and thus maintains the high-efficiency operation state of the entire compressor 000. Moreover, the presence of the first liquid cooling flow channel makes the temperature regulation of the bearing more flexible and accurate, and the flow rate, flow speed, etc. of the cooling liquid can be reasonably adjusted according to different working conditions of the compressor 000, such as high-load operation or long-time continuous operation, to better adapt to various operation requirements, and improve the adaptability and performance of the entire compressor 000 in different application scenarios.

[0075] In some embodiments, referring to Figure 8 and Figure 9 wherein Figure 9The liquid cooling assembly includes a first liquid pipe 106, one end of the first liquid pipe 106 sequentially penetrates the shell 100 and the outer shell 201 and is in communication with the first liquid cooling channel.

[0076] When the first bearing 1081 needs to be cooled, the cooling liquid will flow along the first liquid pipe 106 from the source of the liquid cooling assembly. Since the first liquid pipe 106 is in communication with the first liquid cooling channel, the cooling liquid can smoothly enter the first liquid cooling channel and circulate in the channel to fully exchange heat with the first bearing 1081.

[0077] In some embodiments, the motor assembly 200 includes a second bearing 1083, which is arranged at one end of the output shaft 108 towards the second impeller 105 and is fixed in the shell 100. The second bearing 1083 is provided with a second liquid cooling channel.

[0078] The first bearing 1081 and the second bearing 1083 are accurately arranged at both ends of the output shaft 108 and are stably fixed in the shell 100 of the compressor 000, which provides reliable support for the transmission side of the output shaft 108 and ensures that the output shaft 108 can rotate smoothly and stably, thereby ensuring that power can be stably transmitted to the first impeller 104 and the second impeller 105.

[0079] During the operation of the compressor 000, the second bearing 1083 will generate heat due to friction and the action of the rotating force of the output shaft 108. The presence of the second liquid cooling channel provides a good way for effective heat dissipation. Cooling liquid can enter the second liquid cooling channel through the corresponding pipeline in communication therewith and continuously circulate in the channel. By virtue of the good heat conduction performance of the cooling liquid, the heat generated by the second bearing 1083 can be quickly taken away.

[0080] In some embodiments, the liquid cooling assembly further includes a second liquid pipe 107, one end of the second liquid pipe 107 sequentially penetrates the shell 100 and the outer shell 201 and is in communication with the second liquid cooling channel.

[0081] When the compressor 000 starts and begins to operate, the cooling liquid will flow along the second liquid pipe 107 from the source of the liquid cooling assembly. The cooling liquid can smoothly enter the second liquid cooling channel and circulate in the channel to fully and efficiently exchange heat with the second bearing 1083.

[0082] Through the connection of the second liquid supply pipe 107, it is ensured that the cooling liquid can be accurately delivered to the second bearing 1083, realizing the targeted cooling of the second bearing 1083, cooperating with the cooling path for the first bearing 1081, and comprehensively ensuring that the temperature of the key support components in the motor assembly 200 is within a reasonable range, avoiding the influence of local overheating on the normal operation of the entire motor assembly 200 and even the compressor 000.

[0083] In some embodiments, referring to Figure 6 and combining Figure 7 , Figure 11 and Figure 12 , the shell 201 forms a first chamber, a second chamber and a third chamber, the first bearing 1081 is arranged between the first chamber and the second chamber, the second bearing 1083 is arranged between the second chamber and the third chamber, and the compressor 000 further comprises a wire protection tube 110, one end of the wire protection tube 110 sequentially penetrates the housing 100 and the shell 201 and communicates with the third chamber.

[0084] The wire protection tube 110 can provide physical protection for the electrical lines related to the motor assembly 200, avoiding interference or damage from external factors (such as vibration during operation of the compressor 000, friction of surrounding components, etc.), ensuring the safety and stability of the electrical lines, and thus ensuring the normal power supply and signal transmission of the motor.

[0085] The division of the first chamber, the second chamber and the third chamber and the design of the communication of the wire protection tube 110 help to optimize the space utilization and functional layout inside the compressor 000 as a whole. The clear division of labor of the first chamber, the second chamber and the third chamber makes the internal structure of the compressor 000 more organized and clear, which is convenient for the orderly operation of different components according to functions, and is also convenient for subsequent maintenance, repair and other operations, which is beneficial to improve the reliability, stability and overall performance of the compressor 000.

[0086] In some embodiments, referring to Figure 4 , the output shaft 108 comprises a first connecting portion, a main body portion 1085 and a second connecting portion connected in sequence, the first connecting portion is in transmission connection with the primary impeller 104, the second connecting portion is in transmission connection with the secondary impeller 105, the first connecting portion is arranged in the first chamber, the main body portion 1085 is arranged in the second chamber, and the second connecting portion is arranged in the third chamber.

[0087] When the compressor 000 starts to operate, the power generated by the motor is transmitted through the output shaft 108, the first connecting portion first receives and conducts the power to the primary impeller 104, driving the primary impeller 104 to rotate in the primary compression chamber and starting the preliminary compression work on the refrigerant. The first chamber provides a relatively independent and stable operating environment for the first connecting portion, which helps to reduce the interference of external factors on the transmission process and ensures the accuracy and stability of power transmission.

[0088] The main body part 1085 is reasonably arranged in the second cavity as the intermediate core area of the output shaft 108. It plays a key role in connecting the power from the first connecting part and transmitting the power to the second connecting part. The second cavity surrounds the main body part 1085, which can protect the main body part 1085 from unnecessary collision and wear, and help balance the heat generated by the main body part 1085 during operation, so that the main body part 1085 can stably transmit power at an appropriate temperature, ensuring the continuity and reliability of the entire output shaft 108.

[0089] The second connecting part is in transmission connection with the secondary impeller 105, and is located in the third cavity. The power transmitted by the main body part 1085 is further conducted in the second connecting part to drive the secondary impeller 105 to rotate at high speed in the secondary compression chamber to complete the secondary compression of the refrigerant. The third cavity creates a good working space for the second connecting part, which can also reduce external interference, and cooperates with the first cavity and the second cavity to make the three parts of the output shaft 108 work stably and efficiently in their respective cavities, ensuring the smooth transmission of power from the motor to the primary impeller 104 and then to the secondary impeller 105, and thus improving the compression efficiency and working performance of the entire compressor 000, so that the compressor 000 can stably and reliably complete the compression task of the refrigerant under different working conditions, and lay a solid foundation for the smooth development of the subsequent refrigeration cycle.

[0090] In some embodiments, the first bearing 1081 is a ceramic liquid floating bearing.

[0091] The ceramic material of the ceramic liquid floating bearing has high hardness and wear resistance, which can greatly reduce wear when bearing the continuous friction caused by the high-speed rotation of the output shaft 108, effectively prolong the service life of the bearing, and ensure that the cooperation precision between the output shaft 108 and the bearing is always maintained at a high level, thereby providing solid and reliable support for the stable operation of the compressor 000.

[0092] At the same time, the liquid bearing is suspended by the cooling liquid delivered by the first liquid delivery pipe 106, and the liquid plays a supporting role, and the ceramic material of the ceramic liquid bearing has excellent chemical stability, so that it can effectively resist the corrosion and oxidation of chemical reactions in the process of long-term contact with the refrigerant, lubricating oil and other media in the compressor 000, further strengthen the durability and reliability of the bearing, reduce the risk of compressor 000 failure caused by bearing damage, reduce maintenance cost and downtime, significantly improve the overall working efficiency and stability of the compressor 000, and lay a solid foundation for long-term stable operation of the compressor 000 in complex and variable working environment.

[0093] Correspondingly, the second bearing 1083 can also be a ceramic liquid bearing.

[0094] Although the present application is described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of the present application. Accordingly, the specification and drawings are to be regarded simply as illustrative of the present application as defined by the appended claims, and it is intended to cover any and all modifications, variations, combinations or equivalents that fall within the scope of the present application. Obviously, those skilled in the art can make various modifications and changes to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and changes of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and changes.

[0095] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A compressor, characterized in that, include: The housing forms a primary compression chamber, a transition chamber, and a secondary compression chamber that are connected in sequence. A primary impeller is located within the primary compression chamber; The secondary impeller is located within the secondary compression chamber; A motor assembly is located in the transition chamber, and the motor assembly is drivenly connected to the first-stage impeller and the second-stage impeller.

2. The compressor according to claim 1, characterized in that, The motor assembly includes a housing, with a spaced interval between the housing and the casing to form a cooling channel. One end of the cooling channel facing the first-stage impeller communicates with the first-stage compression chamber, and the other end of the cooling channel facing the second-stage impeller communicates with the second-stage compression chamber.

3. The compressor according to claim 2, characterized in that, The transition chamber is arranged around the periphery of the outer shell.

4. The compressor according to claim 2, characterized in that, It also includes a liquid cooling assembly, which comprises: At least one infusion tube passes sequentially through the housing and the outer shell, and the infusion tube is used to deliver coolant into the interior of the outer shell.

5. The compressor according to claim 4, characterized in that, The motor assembly includes: The output shaft is connected at one end to the first-stage impeller drive and at the other end to the second-stage impeller drive. A first bearing is provided at one end of the output shaft facing the first-stage impeller, and the first bearing is fixed inside the housing. The first bearing is provided with a first liquid cooling channel. The second bearing is located at one end of the output shaft facing the secondary impeller, and the second bearing is fixed inside the housing. The second bearing is provided with a second liquid cooling channel.

6. The compressor according to claim 5, characterized in that, The liquid cooling assembly includes a first infusion tube and a second infusion tube. One end of the first infusion tube passes through the housing and the outer shell in sequence and is connected to the first liquid cooling channel. One end of the second infusion tube passes through the housing and the outer shell in sequence and is connected to the second liquid cooling channel.

7. The compressor according to claim 5, characterized in that, The outer casing forms a first chamber, a second chamber, and a third chamber. The first bearing is disposed between the first chamber and the second chamber, and the second bearing is disposed between the second chamber and the third chamber. The compressor further includes: A protective tube, one end of which passes through the housing and the outer shell in sequence and communicates with the third chamber.

8. The compressor according to claim 7, characterized in that, The output shaft includes a first connecting part, a main body part, and a second connecting part connected to each other. The first connecting part is connected to the first-stage impeller drive, and the second connecting part is connected to the second-stage impeller drive. The first connecting part is located in the first chamber, the main body part is located in the second chamber, and the second connecting part is located in the third chamber.

9. The compressor according to claim 5, characterized in that, The first bearing is a ceramic liquid float bearing; and / or, the second bearing is a ceramic liquid float bearing.

10. A compressor, characterized in that, include: The housing forms a primary compression chamber, a transition chamber, and a secondary compression chamber that are connected in sequence. A primary impeller is located within the primary compression chamber; The secondary impeller is located within the secondary compression chamber; A motor assembly is disposed in the transition chamber. The motor assembly is drivenly connected to the first-stage impeller and the second-stage impeller. The housing and the motor assembly are spaced apart along the radial direction of the housing.

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