59 results about "Linear compressor" patented technology

The present invention relates to a linear compressor. A linear compressor according to an embodiment of the present invention comprises: a discharge cover that forms a discharge chamber through which high-temperature discharge gas flows; and a frame coupled to the discharge cover, wherein the discharge cover may be made of a non-metallic material to reduce heat transfer from the discharge cover to the frame. Furthermore, the discharge cover may be made of a plastic material.

The invention relates to the technical field of compressors, in particular to a lead screw linear compressor which comprises a lead screw motor, a motor shell, a piston rod, a connecting barrel, a cooling fan, an air path pipe, an air cylinder body, a water jacket and a cylinder cover. The piston rod is directly connected with the lead screw motor, linear motion output by the lead screw motor is used for pushing the piston rod to move in a reciprocating mode to compress gas, and the piston head in the air cylinder body is used for constructing the first-stage compression chamber and the second-stage compression chamber. Gas paths are arranged in the cylinder cover and the base of the cylinder body around the first-stage compression chamber and the second-stage compression chamber and are communicated with a first-stage exhaust valve and a second-stage air inlet valve, so that second-stage gas compression under the bidirectional action of the piston rod is realized; on the basis that the mechanical structure of the piston compressor is simplified, the mechanical efficiency is improved, maintenance is convenient, meanwhile, the two-way piston rod can achieve two-stage gas compression in the one-time reciprocating process, friction loss is reduced, and stable and safe operation of the piston compressor can be guaranteed.

The application discloses a kind of air floating support structures of linear compressor and linear compressor, the air floating support structure includes air floating cylinder, air floating support head and air floating support shaft.The one end of air floating cylinder is closed and the other end forms opening, air floating hole is equipped on the cylinder wall of air floating cylinder;Air floating support head is at least partially located in air floating cylinder, and annular air gap is formed between air floating support head and the cylinder wall of air floating cylinder, and annular air gap surrounds air floating support head;One end of air floating support shaft is used to connect the moving component of linear compressor, and the other end of air floating support shaft is connected with air floating support head;Wherein, air floating hole has air inlet and air outlet, air inlet is arranged towards the outside of air floating cylinder and is used to communicate with the exhaust cavity of linear compressor, and air outlet is arranged towards annular air gap;The opening of air floating cylinder is used to communicate with the suction cavity of linear compressor.According to the air floating support structure of the application, it is simple in structure, and can generate radial support to moving component, reduce wear.

A method for controlling a linear compressor of an appliance includes receiving, via a controller of the linear compressor, a d-axis current error signal, a q-axis current error signal, and a DC current error signal. The method also includes determining, via the controller, a DC voltage component signal based on the DC current error signal. The DC voltage component signal is limited by a first voltage threshold. Further, the method includes then determining, via the controller, a d-axis voltage component signal based, at least in part, on the q-axis current error signal. The d-axis voltage component signal is limited by a second voltage threshold. Furthermore, the method includes then determining, via the controller, a q-axis voltage component signal based, at least in part, on the d-axis current error signal. The q-axis voltage component signal is limited by a third voltage threshold that is less than the second voltage threshold. In addition, the method includes controlling, via the controller, a motor of the linear compressor using a single-phase vector-like control scheme based, at least in part, on the DC voltage component signal, the d-axis voltage component signal and the q-axis voltage component signal.

The present invention relates to a linear motor and a linear compressor. A linear motor according to an idea of the present invention comprises: a first stator; a second stator disposed inside the first stator so as to be movable in an axial direction. The mover includes: a plurality of permanent magnets; a front sub core disposed at the front of the plurality of permanent magnets in the axial direction; and a rear sub core spaced from the front sub core in the axial direction so as to be disposed at the rear of the plurality of permanent magnets in the axial direction, wherein the front sub core and the rear sub core are formed to have the same shape.

The utility model relates to the field of linear compressors, in particular to a long-service-life linear compressor which comprises a shell, a piston rod, a piston rod and a piston rod. The stator assembly comprises a stator framework, and the stator framework is connected with the air cylinder seat; the rotor assembly is arranged in the stator assembly and comprises a piston, a first plate spring and a second plate spring are arranged at the two ends of the piston respectively, and the first plate spring and the second plate spring are connected with the stator framework; the piston is in a hollow shape and arranged outside the air cylinder seat in a sleeving mode. The first plate spring and the second plate spring are directly connected with the piston by improving an internal movement structure of the compressor, and the consequence of abrasion increase caused by machining and assembling errors can be reduced; the first plate spring and the second plate spring directly support the left and right sides of the piston, so that the radial supporting effect can be improved, abrasion of the compressor in the operation process is reduced, and the service life of the compressor is prolonged.

The application relates to the technical field of low-temperature refrigeration, and provides a magnetic screw drive thermal-acoustic refrigeration system and method, which comprises at least one thermal-acoustic refrigeration basic unit, the unit comprising a pressure wave generating device, a thermal-acoustic refrigerator and a resonance tube. The pressure wave generating device comprises a pressure-resistant shell, a rotating motor, a magnetic screw shaft, a mover permanent magnet, a compression piston and a rotor permanent magnet arranged on the magnetic screw shaft; the magnetic screw shaft is connected with the rotating motor, the compression piston is arranged in the pressure-resistant shell, the mover permanent magnet is connected with the compression piston and is arranged in opposite interval with the rotor permanent magnet; a compression cavity is formed between the compression piston and the pressure-resistant shell; and the resonance tube is communicated with the compression cavity and the thermal-acoustic refrigerator. The rotating motor is used as a power source, the pressure wave generating device is used to replace a linear compressor, the manufacturing difficulty and cost are reduced, the rotating motor has high power density and high magnetic coupling efficiency, a large sound power can be output in a small volume, and the demand for high refrigeration capacity density is met.

The application relates to the field of low-temperature refrigeration technology and provides a magnetic screw rod free piston Stirling refrigeration system, which comprises a driving unit, a pressure-resistant shell and an expeller, and an expansion cavity is formed on one side of the expeller. The driving unit comprises a rotating motor, a compression piston, a mover, a mover permanent magnet, a screw rod rotating shaft and a rotor permanent magnet; the compression piston is located on the other side of the expeller and has a cylindrical structure with a closed end, the closed end and the expeller form a compression cavity; the mover is embedded in the inner surface of the compression piston, and the mover permanent magnet is arranged on the inner surface of the mover; the screw rod rotating shaft is connected with the rotating motor and extends into the compression piston, and the rotor permanent magnet is sleeved on the screw rod rotating shaft and has an air gap between the rotor permanent magnet and the mover permanent magnet. The rotating motor drives the screw rod rotating shaft to rotate, and the rotary mechanical energy is converted into the reciprocating linear motion of the compression piston through magnetic coupling, so that a high-power linear compressor is not needed; there is no mechanical contact between the compression piston and the screw rod rotating shaft, the reliability of the refrigeration system is improved, and the rotating motor has low cost, so that the overall manufacturing cost is reduced.

The invention relates to a cooling device (11) having a linear compressor (1, 1 ') which is designed as a drive of a refrigeration circuit and which can be actuated by means of a control device (10) in such a way that the linear compressor can optionally be operated at a first operating frequency (fw1) at a resonance frequency (fres) of the linear compressor (1, 1'), or can be operated at a second operating frequency (fw2) which is lower than and different from the resonance frequency (fres) of the linear compressor (1, 1 '). The invention can be particularly advantageously applied to household cooling appliances. The invention also relates to a method for operating a cooling device (11) of a linear compressor (1, 1 ') provided as a drive of a refrigeration circuit, in which the linear compressor (1, 1') is optionally operated at a first operating frequency (fw1) at its resonant frequency (fres) or at a second operating frequency (fw2) which is lower than and differs from the resonant frequency (fres) of the linear compressor (1, 1 '). The invention can be particularly advantageously applied to household cooling appliances.

The present disclosure relates to the technical field of compressors, in particular to a mover offset adjusting device, a linear motor and a linear compressor. Specifically, the mover offset adjusting device comprises a fixing member and an adjusting member. The fixing member is connected with a plate spring assembly sleeved on a mover. One end of the adjusting member is connected with the fixing member, and the other end is connected with an outer circumferential surface of the mover. The end of the adjusting member connected with the mover is movable along the axial direction of the adjusting member. By moving the end of the adjusting member connected with the mover, the mover can be extruded along the radial direction, thereby achieving the effect of adjusting the offset of the mover. The offset adjusting device has a simple structure and is easy to operate.

The invention relates to a linear compressor with a linear electric motor and a household appliance. Disclosed is a linear compressor for a household appliance (e.g., a refrigerator) in which a yoke-magnet arrangement is clamped on a cylinder of a cylinder-piston arrangement in a manner that enables temperature expansion of the yoke-magnet arrangement; in particular by forcing the yoke-magnet arrangement against a fixed stop of the cylinder via a spring force. The invention further discloses a household appliance.

The present invention relates to a linear compressor. A linear compressor according to an embodiment of the present invention comprises: a discharge cover assembly which supports a discharge valve and forms a discharge chamber for a refrigerant discharged through the discharge valve; a frame which supports the discharge cover assembly; a cylinder which is supported inside the frame; a piston which is inserted into the cylinder and reciprocates in the front-rear direction; a support which comprises a base part coupled to the rear side of the piston and a spring support part extending backward from the base part; and a support cap member which is coupled to the spring support part and which includes a separation groove that is recessed in the direction going away from the spring support part.

The invention belongs to the technical field of gas bearings, and relates to a gas bearing structure for a linear compressor of a Stirling cryocooler, the gas bearing structure comprises a first row of throttling holes formed in a piston and a third row of throttling holes formed in an air cylinder, and the third row of throttling holes are communicated with a compression cavity of the air cylinder through a bypass thin channel formed in the air cylinder; the first row of throttling holes sprays air to the inner wall of the air cylinder, the third row of throttling holes sprays air to the outer wall of the piston, the piston is located in the air cylinder, and an air film gap exists between the outer wall of the piston and the inner wall of the air cylinder so that the wall faces of the piston and the inner wall of the air cylinder can not make contact. The mode that the throttling holes are evenly distributed in the axial direction is changed, the third row of throttling holes are additionally formed between the first row of throttling holes and the second row of throttling holes, the third row of throttling holes is changed into the mode that air is sprayed inwards (towards the outer wall of the piston), and due to the fact that the third row of throttling holes is additionally formed, the balance of gas bearing capacity in the axial direction is improved; and radial supporting force is provided in the whole period.

A control device for a linear compressor, according to one aspect of the present disclosure, comprises: an inverter unit that supplies an alternating voltage to the linear compressor on the basis of a control signal; and a control unit that supplies the control signal to the inverter unit so as to control reciprocating motion of a piston, wherein the control unit performs control such that a first alternating voltage having a first amplitude is supplied to a motor in a first cycle, and a second alternating voltage having a second amplitude smaller than the first amplitude is supplied to the motor in a second cycle.

A linear compressor according to the present invention may comprise: a discharge valve for discharging a compressed high-pressure refrigerant; a discharge cover assembly for forming a discharge chamber for the refrigerant discharged through the discharge valve; a frame for supporting the discharge cover assembly; and a cylinder which is supported inside the frame and into which a piston reciprocating in the axial direction is inserted. An embodiment may comprise: a valve spring which supports the discharge valve and reciprocates in the axial direction; a spring bracket which supports the valve spring and is fastened to the discharge cover assembly; and a damping member which is placed on the spring bracket and dampens the vibrations of the valve spring.

This invention provides an integrated linear Stirling refrigerator, comprising a linear compressor, an expander, and a phase adjustment mechanism. The phase adjustment mechanism includes a phase adjustment cavity formed between the moving parts of the linear compressor and the expanding compressor, enabling the moving parts of the linear compressor to move relative to the moving parts of the expanding compressor within a preset stroke, and rigidly driving the moving parts of the expanding compressor to move synchronously beyond the preset stroke. This invention achieves phase adjustment through the phase adjustment cavity between the linear compressor and the expander. The phase difference between them is achieved solely through mechanical geometric coordination, without relying on elastic elements, independent drives, or electronic control systems. This fundamentally eliminates problems such as fatigue failure and drive malfunctions, significantly improving lifespan and reliability. Furthermore, the phase difference is uniquely determined by the axial dimension of the phase adjustment cavity and is unaffected by temperature or operating conditions, solving the problem of significant refrigeration efficiency degradation in traditional pneumatic linear Stirling refrigerators under varying operating conditions.

The utility model discloses an opposed linear compressor supported by double end plate springs, which comprises a main frame part, two stator parts, a rotor part and a compressor shell, the number of the stator parts is two, and the two stator parts are symmetrically arranged on two sides of the main frame part and are used for reducing the vibration of the compressor; and the mover part and the stator part are respectively connected through fastening screws. The utility model solves the problems of insufficient non-contact clearance sealing reliability and shorter service life of the existing high-power single-side plate spring supported free piston type linear compressor, overlong length and overlarge volume of an opposed linear compressor and the like, and is particularly suitable for high-power high-cooling-capacity refrigerators.

An embodiment of the present invention can comprise: a shell; a first support device for supporting a first axial side of a main body between the shell and the main body inside the shell; and a second support device for supporting a second axial side of the main body between the shell and the main body inside the shell. The main body includes: a rear cover connected to the first support device; a frame supported by the second support device; a cylinder which is supported inside the frame and into which a piston moving back and forth in the axial direction is inserted; a stator which is fixed to the frame and which has a portion surrounding the cylinder; and a resonant spring placed between the stator and the rear cover, wherein the piston can operate in a region in which the speed coefficient (alpha value) of the electric equation of the compressor is 70% or more.

The present invention relates to a linear compressor. The linear compressor according to an embodiment of the present invention comprises: a first discharge cover forming a first discharge chamber through which high-temperature discharge gas flows; a second discharge cover forming a second discharge chamber through which the discharge gas discharged from the first discharge chamber flows; and a damping member provided in the region where the first and second discharge covers are coupled, and thus vibration or noise generated in the first and second discharge covers can be reduced.

The present invention relates to a linear compressor. The linear compressor according to an embodiment of the present invention comprises: a cylinder forming a compression space; a piston inserted into the cylinder and having suction ports for suctioning a refrigerant into the compression space; and a suction valve for opening or closing the suction ports to control the amount of the refrigerant suctioned into the compression space. The piston may comprise a valve wall facing the compression space and a stepped valve seating surface in the valve wall to seat the suction valve.

The present invention relates to a linear compressor. A linear compressor, according to an embodiment of the present invention, comprises: a discharge cover assembly that supports a discharge valve and defines a discharge chamber for refrigerant discharged through the discharge valve; a frame that supports the discharge cover assembly; a cylinder that is supported inside the frame and has a piston reciprocating in the axial direction inserted therein; a shell that forms a space in which the discharge cover assembly, the frame, and the cylinder are arranged; and a flow prevention member that is mounted along the outer circumferential surface of the frame to prevent forward and backward flow of fluid between the inner surface of the shell and the outer circumferential surface of the frame.

The invention belongs to the technical field of compressor accessories, and discloses an air cylinder cooling structure of a linear compressor. The air cylinder cooling structure of the linear compressor comprises an air cylinder, the outer side of the air cylinder is sleeved with a heat exchange sleeve, the heat exchange sleeve wraps the bottom and the side wall of the air cylinder, a plurality of cooling liquid channels are formed in the heat exchange sleeve, and connecting bases are fixedly connected to the positions, corresponding to the cooling liquid channels, of the bottom of the heat exchange sleeve. According to the air cylinder cooling structure of the linear compressor, by means of the design of the heat exchange sleeve and the cooling liquid channel, external cooling liquid can be connected to dissipate heat of the air cylinder, heat generated in the working process of the air cylinder can be evenly absorbed, heat accumulation is reduced, and gaseous cooling liquid in the cooling liquid channel can be discharged through the design of the exhaust mechanism; the dryness of the cooling liquid is kept at a lower level, the situation that the cooling effect is affected by the too high dryness of the cooling liquid at the back section of circulation in the traditional technology is avoided, the structure is simple, the cooling efficiency is high, and the problems in the background technology are solved.

The application provides a two-stage linear compressor, which comprises a shell, a moving-magnet linear motor, a first-stage compression assembly and a second-stage compression assembly; the shell has a containing cavity, an air inlet and an air outlet; the moving-magnet linear motor comprises a stator and a mover; the first-stage compression assembly and the second-stage compression assembly are coaxially arranged in the containing cavity; the first-stage compression assembly comprises a first piston, a first cylinder and a first exhaust valve; one end of a first suction passage is communicated with the air inlet, and the other end is communicated with the containing cavity through the first exhaust valve; the second-stage compression assembly comprises a second piston, a second cylinder and a second exhaust valve; one end of a second suction passage is communicated with the containing cavity, and the other end is communicated with the air outlet through the second exhaust valve; a suction control valve is arranged in each of the first suction passage and the second suction passage. The two-stage linear compressor has a small axial size, can reduce the leakage amount in a large pressure difference application scenario, reduce the exhaust temperature and improve the compressor performance.

The present invention relates to a linear compressor. The linear compressor according to an embodiment of the present invention comprises: a first discharge cover forming a discharge space in which a refrigerant discharged through a discharge valve is accommodated; a second discharge cover coupled to the interior of the first discharge cover to shield the discharge space; and a fixed ring attached to the inner circumferential surface of the first discharge cover to partition the discharge space into a plurality of spaces.

The present invention relates to a linear compressor. A linear compressor according to an embodiment of the present invention comprises a discharge valve for discharging refrigerant compressed in a compression space of a cylinder, the discharge valve comprising a valve body that selectively comes into contact with the cylinder, and an insertion protrusion that protrudes from the valve body in the axial direction and is coupled to a valve spring, wherein the insertion protrusion comprises a first portion that protrudes from a central portion of the valve body in the axial direction, and a plurality of second portions that extend from an outer circumferential surface of the first portion in the radial direction, and the plurality of second portions may be spaced apart from one another in the circumferential direction along the outer circumferential surface of the first portion.

The oil-free linear compressor comprises a shell, a linear driving mechanism, a compression assembly, a supporting mechanism and an exhaust assembly, the linear driving mechanism is used for providing driving force for the compression assembly, and the compression assembly comprises an air cylinder and a piston in clearance fit with the air cylinder; a valve plate assembly is arranged at the end of the piston, a compression cavity is formed between the valve plate assembly and the other end of the air cylinder, static pressure air holes distributed in the axial direction are formed in the side wall of the piston, and a plurality of confluence grooves communicated with the sealing gap are formed in the side wall of the air cylinder; the supporting mechanism is arranged between the piston and the shell; the exhaust assembly comprises a sealing cover connected with the air cylinder in a sealed mode, an exhaust valve is connected into the sealing cover, a high-pressure cover communicated with the sealing cover is arranged at the other end of the sealing cover, and the high-pressure cover is provided with an exhaust pipe communicated with the outside and the interior of the high-pressure cover. Air film sealing is formed through the static pressure air holes, friction loss is remarkably reduced, the service life of parts is prolonged, efficient and sealed exhaust is achieved, and energy loss and leakage risks are reduced.

The application discloses a kind of based on double SOGI linear compressor sensorless resonant frequency control method and system, belong to linear compressor resonant frequency tracking control technical field, the method according to linear compressor work in system resonant frequency point when piston stroke and current phase difference is 90 ° characteristics, using SOGI combines second-order low-pass filter to calculate the phase difference between stroke and current, and utilize P controller to control the phase difference to 90 °, to realize resonant frequency tracking;Sliding mode observer is constructed to observe motor back electromotive force information, and estimated back electromotive force signal is filtered using SOGI, to obtain almost no amplitude and phase shift piston stroke signal.The method proposed in the application can accurately track system resonant frequency, with small amount of calculation, simple operation, tracking precision and the like advantages.

The invention relates to a structure for restraining offset of a piston of a linear compressor, the compressor and a refrigerating machine, the structure is arranged in the linear compressor, the linear compressor comprises a machine shell, an air cylinder, a suspension assembly and two linear motors, the air cylinder and the suspension assembly are installed in the machine shell, and the two linear motors are oppositely arranged; the linear motors are in driving connection with pistons, and the pistons of the two linear motors are slidably installed at the two ends of the air cylinder correspondingly and define a compression cavity. The end, away from the piston, of the linear motor and the machine shell form a back pressure cavity, and the linear motor is fixed into the machine shell through a hanging assembly. A one-way countercurrent airflow channel is arranged in the machine shell, an air inlet of the one-way countercurrent airflow channel is communicated with the backpressure cavity, and an air outlet of the one-way countercurrent airflow channel is communicated with the compression cavity and used for adjusting the pressure of the compression cavity and the backpressure cavity. Compared with the prior art, the piston has the advantages that the structure is simple, machining is convenient, piston offset can be effectively restrained, and the refrigerating performance of the refrigerator is guaranteed.

The present invention relates to a linear compressor. The linear compressor according to an embodiment of the present invention comprises: a shell forming an inner space; a first shell cover coupled to one side of the shell; a second shell cover coupled to the other side of the shell; and a main body disposed in the inner space, wherein the main body comprises: a first discharge cover supporting a discharge valve and forming a first discharge chamber for a refrigerant discharged through the discharge valve; a second discharge cover coupled to the first discharge cover, forming a second discharge chamber for the refrigerant discharged from the first discharge chamber, and having a front end portion facing the first shell cover; and a cap member coupled to the front end portion of the second discharge cover.