64results about How to "Reduce design requirements" patented technology

The utility model provides a mattress frame taking mechanism, and belongs to the technical field of machinery. The problem that an existing mechanism is large in design difficulty is solved. The mattress frame taking mechanism comprises a rack and a grabbing assembly used for grabbing a frame. The rack is provided with a longitudinal beam and a lifting assembly used for driving the longitudinal beam to ascend and descend. A supporting frame is arranged between the longitudinal beam and the material grabbing assembly, and the material grabbing assembly is arranged on the supporting frame. The supporting frame is hinged to the lower end of the longitudinal beam, a driving mechanism enabling the supporting frame to swing in a reciprocating mode is arranged on the longitudinal beam, and the swing angle of the supporting frame ranges from 0 degree to 90 degrees so that the frame can be switched from the vertical state to the horizontal state. The mattress frame taking mechanism is low in design difficulty.

The invention discloses a square part parallelism and perpendicularity deterministic modification processing method which comprises the following steps: S1, according to the parallelism and perpendicularity error S (x, y) of the surface of a to-be-processed square part, deterministic modification equipment obtains residence time distribution V (x, y) of the to-be-processed surface in the length and width directions through residence time calculation and conversion; s2, the deterministic shaping equipment does variable-speed motion along the length and width of the to-be-machined surface according to V (x, y) distributed by residence time, so that parallelism and perpendicularity error correction is carried out; s3, the parallelism and perpendicularity error of the square part to be machined is detected, and if the parallelism and perpendicularity error of the square part to be machined meets the preset requirement, machining is completed; otherwise, the step S1 and the step S2 are executed repeatedly till the parallelism and the perpendicularity of the square part to be machined meet the preset requirements. The method has the characteristics of simple principle, high machining precision, high automation degree and the like.

The invention discloses a SiC MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) device and a preparation method thereof, and relates to the technical field of semiconductors. The epitaxial layer is located on the first surface of the substrate; the first graphene layers are located on the surface, away from the substrate, of the epitaxial layer, and the two first graphene layers are arranged at intervals in the direction parallel to the substrate; the source electrodes are located on the surface, away from the substrate, of the first graphene layer, the two source electrodes are arranged at intervals in the direction parallel to the substrate, and the orthographic projection of the source electrodes is overlapped with the orthographic projection of the first graphene layer in the direction perpendicular to the substrate; the second graphene layer is located on the second surface of the substrate; wherein the first surface and the second surface of the substrate are oppositely arranged; the drain electrode is located on the surface, away from the substrate, of the second graphene layer; the gate dielectric layer is located on the surface, away from the substrate, of the epitaxial layer and located between the two source electrodes; and the gate is located on the surface, deviating from the substrate, of the gate dielectric layer. According to the invention, the performance of the SiC MOSFET device can be improved.

The invention provides an optical lens with a short moving group stroke, and the optical lens comprises a front fixed group, the front fixed group comprises a first lens, the first surface is a convex spherical surface, and the second surface is a concave aspheric surface; the movable group sequentially comprises a zooming group and a compensation group along the light incidence direction, and the focusing group is arranged on one side of the compensation group; the zoom group comprises a second lens, the first surface is a plane, and the second surface is a concave aspheric surface; the compensation group comprises a third lens and a fourth lens, the first surfaces are convex aspheric surfaces, and the second surfaces are concave spherical surfaces; the focusing group comprises a fifth lens close to the fourth lens side and a sixth lens far away from the fourth lens side of the fifth lens, the first surface of the fifth lens is a concave spherical surface, the second surface of the fifth lens is a convex aspheric surface, the first surface of the sixth lens is a concave spherical surface, and the second surface of the sixth lens is a convex aspheric surface; the driving assembly is at least used for driving the second lens, the third lens and the fourth lens to move along the optical axis along the corresponding motion paths. The optical lens can realize high-quality imaging in a short moving group stroke.

The utility model discloses a gas meter current control circuit based on M-Bus communication, which is characterized by comprising a transmitting end circuit and a receiving end circuit, the transmitting end circuit is connected with a single chip microcomputer, the receiving end circuit is connected with the transmitting end circuit through an M-Bus communication bus, the transmitting end circuit is used for converting a transmitting signal of the single chip microcomputer into a current signal, and the receiving end circuit is connected with the receiving end circuit through the M-Bus communication bus. And the receiving end circuit is used for detecting the current signal change and decoding the current signal change into a digital signal. Compared with the prior art, the gas meter current control circuit based on the M-Bus communication has the advantages that the gas meter current control circuit based on the M-Bus communication is carried out in a two-wire system communication mode, corresponding level signals are converted and modulated through current signals, the stability of signal transmission is improved, and the anti-interference capacity is improved.

This invention relates to a timing recovery device, a jitter reduction circuit, and a receiver device. More specifically, a particular embodiment of the invention provides a timing recovery device with two stages. The first stage generates a clock signal to sample a received waveform, and the second stage provides timing jitter reduction. The second stage includes a jitter reduction circuit having coefficients of an instantaneous jitter estimation function; it also includes a jitter estimation tracking loop consisting of an error generator, a timing error detector, and a loop filter for compensating for timing jitter associated with the clock signal. Other embodiments also exist.

The invention provides a small-opening distance light and signal lamp module system. A distance light source module, a distance light main light type total reflection module, a distance light auxiliary light type total reflection module, a distance light incident lens module and a distance light emergent lens module are arranged on a distance light lens body; the high-beam module main body is provided with a high-beam light source module, a high-beam main light type total reflection module, a high-beam light inlet lens module and a high-beam light outlet lens module; the signal lamp module body is provided with a signal lamp light source module, a signal lamp main light type total reflection module, a signal lamp light inlet lens module and a signal lamp light outlet lens module. The modular design is adopted, all the modules can be made into the same size, the number of the modules is designed according to different performance requirements, and horizontal arrangement, vertical arrangement or tree shape and the like can be achieved.

The utility model provides a novel magnetic quenching structure, which comprises a housing, a yoke is arranged in the housing, the surface of the yoke is connected with an iron core, and a coil is wound on the surface of the iron core; a movable contact spring is arranged on one side of the surface of the yoke, a movable contact is arranged on one side of the movable contact spring, an armature is arranged below the movable contact spring, and the armature is connected with one end of the iron core; a lower static spring is arranged on one side of the yoke, a static contact is arranged on the surface of the lower static spring, and a stopper is arranged above the static contact; a bottom plate is arranged on the top of the yoke. The novel magnetic quenching structure provided by the utility model adopts an overall independent structure, is small in size, enables electric arcs generated when small and ultra-small relays control high-voltage load actions to be quickly damaged, reduces the damage of the electric arcs to contacts and the whole relay, improves the contact reliability of the whole system, and improves the reliability of the system. And the service life is greatly prolonged, and the failure rate is greatly reduced.

The application provides a matrix converter system and a control method thereof. The matrix converter system comprises a first output port and a second output port, at least two phases, N converter valve bridge arms, Q first magnetic elements, the i-th first magnetic element comprises N first ports, M second ports, the N first ports of the i-th first magnetic element are connected in series with one end of the N converter valve bridge arms respectively, the other end of the N converter valve bridge arms is connected with any one phase of the first output port respectively, and the other end of at least one converter valve bridge arm is connected with a phase of the first output port which is different from the phase of the first output port connected with the other end of the remaining converter valve bridge arms, and the M second ports of the i-th first magnetic element are connected with any one phase of the second output port respectively, and at least one second port is connected with a phase of the second output port which is different from the phase of the second output port connected with the remaining second ports. i i i i i i ​​​​​​

The utility model relates to the technical field of costume embossing, and discloses a novel costume embossing device which comprises an embossing support, an embossing device, a displacement platform, a transmission mechanism and a lifter, the displacement platform is installed on the embossing support, the lifter is installed on the displacement platform, the embossing device is installed at the lifting end of the lifter, and the transmission mechanism is installed on the transmission mechanism. A conveying mechanism is arranged below the embossing device and used for conveying an object to be embossed to the position below the embossing device, and the object is embossed through the embossing device. The embossing technology is reasonably designed, the embossing support, the embossing device, the displacement platform, the conveying mechanism and the lifter are adopted, embossing can be conducted at any time by changing the position, embossing can be easily operated, conveying is continuous, and the embossing time efficiency is high. The controller is matched with the embossing device, the displacement platform, the transmission mechanism and the lifter, so that automatic production is realized, manual labor force is liberated, and embossing errors and the like are also reduced.

This invention discloses an adjustable clearance reciprocating compressor and its control method, belonging to the field of compressor technology. The reciprocating compressor includes a cylinder body with a piston chamber, a main piston in the piston chamber, and an intermediate piston in the piston chamber. The intermediate piston and the main piston form a compression chamber. It also includes an adjustment mechanism, which includes a partition plate and a metal diaphragm. The intermediate piston and the partition plate form a first chamber, the partition plate and the metal diaphragm form a second chamber, and the metal diaphragm and an end plate form a third chamber. The partition plate has a channel connecting the first and second chambers, and the channel is equipped with the control mechanism. The third chamber is equipped with an oil supply system. The control method is based on the reciprocating compressor. This solution not only enables clearance adjustment of the reciprocating compressor but also features reliable compressor sealing performance and optimized stress on the metal diaphragm to extend its service life.

The present invention discloses a sliding block mechanism of an obliquely hung lifting platform. The lifting platform includes a bottom plate and a side plate. The side plate is slidably mounted on an upper guide rail and a lower guide rail through a sliding block mechanism. The sliding block mechanism includes an upper sliding block and a lower sliding block. The upper sliding block includes an upper mounting plate. An embracing device is respectively mounted on both ends of one side of the upper mounting plate. The other side of the upper mounting plate is rotatably mounted on the side plate through an upper main bearing. The lower sliding block includes a lower mounting plate. A semi-embracing device for slidably holding the lower guide rail is respectively mounted on both ends of one side of the lower mounting plate. The other side of the lower mounting plate is rotatably mounted on the side plate through a lower main bearing. The present invention adopts a method of matching the upper and lower sliding blocks, so that the obliquely hung lifting platform is safer and more reliable, runs more smoothly, and turns more flexibly. It can effectively reduce the failure rate of the obliquely hung lifting platform and reduce the design requirements for the guide rail.

This utility model provides a water tank assembly and a cooking appliance. The water tank assembly includes: a water tank with a receiving cavity; a water guide pipe disposed inside the water tank and communicating with the receiving cavity, the water guide pipe and the water tank being integrally formed; a water outlet pipe extending out of the water tank, the water outlet pipe and the water tank being integrally formed; and a connecting pipe, the water guide pipe being connected to the water outlet pipe through the connecting pipe. The technical solution of this application effectively solves the problems of complex assembly process and high processing cost of water tank assemblies in related technologies.

The invention belongs to the field of wave gliders, and particularly discloses a wave glider system for controlling steering based on sea surface floating body cable transmission, steering driving torque of a sea surface floating body is transmitted by means of a thin and long cable between the sea surface floating body and a glider, an underwater glider wing plate limiting device is driven to rotate by 180 degrees, and by means of rotation of the limiting device, the underwater glider wing plate is driven to rotate by 180 degrees. And the wing plate in contact with the limiting device is driven to turn over, so that the turning and reversing of the wing plate are realized. After all or part of the wing plates on one side are turned over, the horizontal thrust borne by the wing plate and the thrust borne by the other wing plate form steering torque, and the whole wave glider is driven to steer. Only a mechanical transmission structure is designed in the underwater glider, and power elements do not need to be installed.

The invention discloses a passive auxiliary soft switching power amplifier based on hybrid ZVS (Zero Voltage Switching) / ZCS (Zero Voltage Switching). The passive auxiliary soft switching power amplifier comprises a double-direct-current voltage module, a double-resonant capacitor and resonant inductor passive soft switching network, a midpoint double-path parallel bridge arm, a double-switching tube high-frequency main power output bridge arm, a double-parallel auxiliary capacitor and an LC filtering output network. The passive auxiliary device adopted by the invention is simple, an additional auxiliary switch tube and a driving module are not needed, and the control complexity is greatly reduced; the design that the resonant inductor is connected in series with the midpoint bridge arm avoids the direct connection risk of the bridge arm fundamentally, dead time does not need to be set, and the operation reliability is improved; meanwhile, a hardware condition is created for realizing hybrid ZVS / ZCS for the full-switching tube, so that the switching loss is reduced, the heat loss of the whole machine is reduced due to the low-loss characteristic of the passive network, the heat dissipation design can be simplified, and the service life of the device can be prolonged; and the network structure is simple, small in size and easy to integrate.

A medical device is characterized in that a first function module and at least one second function module are arranged in a shell, at least one of the first function module and the second function module is a module with a medical function, the first function module is used for outputting first information, and the second function module is used for outputting second information. The first function module and the second function module share the same displayer to display the first information and / or the second information, and when the first information and the second information need to be displayed at the same time, the first function module and the second function module can serve as an information receiving end module and an information sending end module respectively; and the receiving end module receives the first information or the second information needing to be displayed from the sending end module, generates a first display signal based on the first information and the second information, and sends the first display signal to the display, so that the display displays the first information and the second information at the same time. According to the medical equipment, information of different functions on single equipment can be displayed on the same display at the same time.

The application discloses a LIN automatic addressing system and method combined with a single-wire bidirectional protocol, wherein the automatic addressing system comprises a host, a slave module and a LIN bus; the slave module comprises a plurality of slave nodes; each slave node comprises a LIN physical layer transceiver, two bidirectional ports PIN0 and PIN1, and a LIN protocol controller; the LIN physical layer transceiver serves as a receiving end and a transmitting end of the slave node and is in bidirectional communication with the LIN protocol controller through control signal lines TXD and RXD; when the first slave node and the second slave node are disconnected, the whole system still performs automatic addressing; and when the link between the last slave node and the previous slave node is disconnected, the last slave node can still complete address allocation.

The invention relates to the technical field of integrated circuits, and discloses a hysteresis comparator circuit based on a double-gate field effect transistor and an integrated chip, the hysteresis comparator circuit comprises at least two cascaded phase inverters, each phase inverter at least comprises an input tube and a load tube, the input tube is connected with the load tube, and the load tube is connected with the input tube. The drain electrode of the input tube is connected with the source electrode of the load tube, a connection node is configured as the output end of the phase inverter, and at least one of the input tube and the load tube of each phase inverter is a double-gate field effect tube; the feedback electric wire is connected between the second grid electrode of the double-grid field effect transistor in the first-stage phase inverter and the output ends of the other phase inverters, so that signals on the first grid electrode and the second grid electrode of the double-grid field effect transistor change in an in-phase mode, and positive feedback for achieving the hysteretic effect is formed. According to the hysteresis comparator, the common modulation effect of the two grid electrodes of the double-grid field effect transistor is utilized to form the hysteresis effect, the on-chip integration difficulty of the hysteresis comparator is reduced, and the flexibility of the hysteresis comparator is improved.

The utility model relates to the technical field of mobile power supply, concretely relates to a mobile power supply. Mobile power supply includes the casing, control circuit board, charging wire and handle plug connector, control circuit board installs in the casing, and one end of charging wire is connected with control circuit board electricity, and charging wire leads out from the casing, and handle plug connector fixed mounting is installed on charging wire, and the handle plug connector is equipped with the plug -in groove, and the charging head of charging wire can be detachably inserted in the plug -in groove to form the handle structure. The casing does not need to set up the storage groove to store the fixed charging head to form the handle structure, avoids the high requirement of the casing design and mobile power supply internal component design layout, improves the problem of mobile power supply overall structure design difficulty. And the handle plug connector is as the independent part, does not influence each other with the casing or internal component of mobile power supply itself, and the design freedom is also bigger, and the design requirement is also lower.

A kind of dual-phase variable loop order increment high-resolution analog-digital converter circuit based on multi-bit quantization, containing analog loop filter (hereinafter referred to as ΔΣ loop) and downsampling digital filter, there is phase switching switch, the phase switching switch includes L-1 phase switching switch in loop filter and L-1 phase switching switch in downsampling digital filter.The present application uses the architecture of first order and high order IADC mixedly, signal weight is made uniform by distributing the period number of phase 1 larger in total clock cycle, while fast accumulation is obtained by high order accumulation in a small part of total clock cycle to effectively improve the accuracy of system.Guarantee the weight of part input signal uniform in a sampling conversion period, to improve the effectiveness of DWA to suppress multi-bit DAC nonlinearity.

The present invention discloses a cable-type low-frequency electromagnetic field radiator and a detection method, comprising a cable (1), two current-carrying conductors in the cable (1), a phase shifter (2) connected to the end of the cable (1), and the phase shifter (2) is driven by an external driving circuit (3) to change the phase of the current in the two current-carrying conductors in the cable. The invention provides a new method for the radiation of low-frequency electromagnetic fields, improves the stability and versatility of its design, and has significant military and economic benefits.

The utility model provides a simple hinge type slope adjusting device for a precast beam plate. The simple hinge type slope adjusting device comprises a bottom bearing plate and a top bearing plate, an arc-shaped barrel is arranged on the top surface of the bottom bearing plate, and sealing plates are arranged at the two ends of the arc-shaped barrel correspondingly so as to define an arc-shaped hinged support with the bottom bearing plate; an arc-shaped limiting plate used for being attached to the outer wall of the arc-shaped barrel is arranged on the bottom face of the top bearing plate, and side limiting plates are arranged at the two ends of the arc-shaped limiting plate correspondingly and used for containing the arc-shaped hinged supports. A jacking assembly is further arranged on one axial side of the arc-shaped hinged support, the bottom end of the jacking assembly is fixedly connected with the bottom bearing plate, and the top end of the jacking assembly abuts against the bottom face of the top bearing plate. According to the slope adjusting device, the arc-shaped hinged support is arranged between the two bearing plates to replace a triangular plate in the prior art, so that the two bearing plates are hinged in a surface contact mode to disperse upper loads, the arc-shaped hinged support can serve as a main stress part, and the design requirement of a jacking assembly is lowered.

This invention relates to the field of automotive sealing strips, specifically disclosing a water pressure penetration testing device and method for automotive sealing strips. The device includes a water inlet terminal, a test box, and a water outlet terminal connected in sequence, and a pressurizing component connected to the water inlet terminal; an observation window disposed on the test box, facing the sealing strip; and several mounting blocks, detachably installed inside the test box and facing the observation window. The sealing strip to be tested is detachably installed between the mounting blocks and the observation window. The thickness of the mounting blocks is different, or the thickness of the mounting blocks can be varied. This solution allows for the selection of mounting blocks of appropriate thickness based on the pressure between the sealing surface of the sealing strip and the observation window, or by changing the thickness of the mounting blocks during the testing process to control the pressure between the sealing surface of the sealing strip and the observation window, thereby simulating different sealing pressures and sealing reaction forces between the sealing strip and the contact component during actual installation.

The present disclosure proposes an AC fault control method and device for the coordination of a converter and a flexible DC system, comprising: in the case of surplus power in the flexible DC transmission system, monitoring the DC voltage value of an onshore converter station of the flexible DC transmission system, and in response to the DC voltage value reaching a voltage threshold, controlling the offshore converter station of the flexible DC transmission system to execute a low-voltage voltage limiting control strategy to reduce the AC bus voltage amplitude of the offshore converter station, and in response to the voltage amplitude dropping to an amplitude lower limit, controlling the grid-side converter of a wind turbine converter system to execute a low-voltage current limiting control strategy to reduce the input power of the flexible DC transmission system. When a minor fault occurs in the system, the reactive power support and overvoltage regulation capabilities of the flexible DC system can be fully utilized without the need for investment in energy-consuming devices, thereby improving the control effect of AC faults.

The present application relates to an endoscope and a hydraulically driven snake bone for the endoscope, the snake bone comprising: a joint assembly comprising a plurality of intermediate joints; the adjusting assembly comprises a channel and a plurality of bag bodies, the bag bodies are arranged between the adjacent middle joints, the channel is communicated with the bag bodies, the channel and the bag bodies form a driving unit, each driving assembly is at least provided with two driving units capable of being in linkage, one of the two driving units is filled with liquid, and the other driving unit is used for discharging liquid. The two driving units are oppositely arranged on the joint assembly. According to the snake bone, fluid hydraulic drive bending is achieved through the bag body, no traction rope is arranged, snake bone bending is achieved by controlling deformation of the bending bag body through hydraulic pressure, the snake bone can be controlled to be bent step by step from one end, the bending radius is reduced, and operation of an endoscope body in a narrow space is facilitated; the arrangement position of the driving unit is flexible, and fluid flows quickly in the driving unit, so that the bending direction of the snake bone is controlled more accurately.

The invention discloses a scum removing device for high-temperature alloy vacuum smelting, and particularly relates to the technical field of high-temperature alloy vacuum smelting. Comprising a shell and a high-temperature alloy smelting crucible, a moving mechanism is arranged on the shell and used for driving the shell to move to the position over the high-temperature alloy smelting crucible, and a moving rod and a fixed rod which are located at the same height are arranged under the shell; the ends, close to the inner wall of the high-temperature alloy smelting crucible, of the movable rod and the fixed rod are provided with arc faces matched with the inner wall of the high-temperature alloy smelting crucible, the shell is further provided with a driving mechanism used for driving the movable rod to rotate along the inner wall of the high-temperature alloy smelting crucible, and the end of the movable rod is kept to abut against the end of the fixed rod all the time in the rotating process. The moving rod abuts against the side wall of the fixed rod when not rotating. By the adoption of the technical scheme, the problem that an existing high-temperature alloy vacuum smelting scum removing device is low in scum removing efficiency is solved, and the scum removing efficiency is improved.

The invention belongs to the technical field of semiconductor packaging, and discloses a millimeter wave radio frequency chip BGA packaging tube shell which comprises a ceramic base, a kovar enclosure frame, a cover plate and a BGA ball. A first metal coating is plated on the upper surface of the ceramic base, a second metal coating is plated on the lower surface of the ceramic base, a top layer bonding pad is etched on the periphery of the first metal coating, a bottom layer ball mounting pad is etched on the periphery of the second metal coating, and the top layer bonding pad and the bottom layer ball mounting pad are arranged in a one-to-one correspondence mode; the ceramic pedestal is provided with a through hole, and the through hole is internally provided with a copper column which is used for connecting the corresponding top layer bonding pad and bottom layer ball mounting pad. The kovar enclosure frame is fixedly arranged on the peripheral edge of the upper surface of the first metal coating, and the cover plate is packaged on the top of the kovar enclosure frame. According to the invention, the isolation between the radio frequency interfaces is improved, the heat dissipation requirement of the chip is met, and the use cost of the product and the process assembly difficulty are reduced.

This invention discloses a method for parallelizing and pipelining a nested multiplier, relating to the field of intelligent warehousing technology. Based on the nested multiplication concept, the multiplication operation is decomposed into a formula to obtain the squaring operation of the high-bit part and the difference of squares plus shift operation of the low-bit part. Based on the characteristic of 2ab in the multiplication formula, the intermediate values ​​required for high-bit calculation are obtained by querying a preset low-bit square value table through the low-bit results. For batch data, multiple sets of data are processed simultaneously through a parallel architecture. The overall calculation process is divided into multiple pipeline stages, and continuous calculation is achieved through stage cascading. The pipeline output results of each parallel computing unit are collected, verified, and integrated to output a complete set of multiplication results. This invention achieves breakthroughs in hardware resources, computational latency, and batch throughput through the collaborative design of nested recursive simplification, pipeline reuse, and parallel architecture, providing an efficient solution for high real-time and high-parallelism digital computing scenarios.

The invention discloses a super capacitor assembly on a mobile charging vehicle and an application method thereof, and relates to the technical field of mobile charging vehicles. The super capacitor assembly comprises a high-voltage energy storage battery, a power supply conversion module, a low-voltage driving loop, a super capacitor and a relay. According to the super-capacitor assembly on the mobile charging vehicle and the application method of the super-capacitor assembly, a DCDC is adopted in a power supply system, a high-voltage energy storage battery mounted on the mobile charging vehicle is subjected to voltage reduction to supply power to a driving system, a super-capacitor is connected into the driving system in parallel, and feedback current of a motor is absorbed through the super-capacitor; the problems of high cost, complex system, inconvenience in use and the like caused by adopting a high-voltage small-power motor or adding a small-capacity medium-low voltage battery in a mobile charging vehicle are solved.

This utility model relates to the field of compressor technology and discloses a fully enclosed single-stage centrifugal compressor, including a lower casing, an upper casing, an impeller, a rotating main shaft, and a motor stator. An impeller and a thrust disc are provided on one side of the rotating main shaft. The main body of the rotating main shaft is rotatably connected to the upper and lower casings via radial bearings on both sides, and the main body of the rotating main shaft is rotatably mounted in the motor stator, which is mounted on the lower casing's internal fixed seat. The upper and lower casings are connected by welding. A refrigerant inlet is provided on the side of the lower casing, and a refrigerant outlet is provided on the volute. This utility model uses refrigerant as the compressor's compression medium. The refrigerant enters through the lower casing inlet, passes through the lower and upper casings, is compressed by the impeller, and flows out through the outlet. Simultaneously, the refrigerant cools the motor stator, reducing the number of compressor parts and improving heat dissipation efficiency. Furthermore, the bearings used in this utility model are air-suspended or magnetic-suspended bearings, eliminating the need for lubrication and increasing energy efficiency.