115 results about "Linear compressor" patented technology

The utility model relates to the technical field of low temperature and extremely low temperature, and provides a low-vibration miniaturized dilution refrigerator which comprises a pre-cooling module, a dilution module, a hot connection component and a dilution refrigeration cycle working medium module. Wherein the pre-cooling module comprises a two-stage Stirling pulse tube refrigerator and a throttling refrigerator; the two-stage Stirling pulse tube refrigerator provides precooling for the throttling refrigerator, and the throttling refrigerator provides precooling for the refrigeration cycle working medium dilution module; the hot connecting part is used for connecting the pre-cooling module and the refrigeration cycle working medium diluting module; the refrigeration cycle working medium dilution module provides a refrigeration cycle working medium for the dilution module. The precooling module comprises two stages of Stirling pulse tube refrigerators coupled with the throttling refrigerator for precooling, and each of the Stirling pulse tube refrigerators and the throttling refrigerator is only provided with one moving part of the linear compressor, so that the vibration and the size of the dilution refrigerator are reduced from the source; and application occasions with strict requirements on vibration and service life are met.

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.

An elastic body and a linear compressor including the elastic body are provided. The elastic body according to an aspect of the present disclosure includes a plurality of elastic units disposed circumferentially around an axis, each of the plurality of elastic units has a corresponding shape, each of the plurality of elastic units includes an elastic portion that is spirally formed while moving away from the axis, an outer portion disposed on an outside of the elastic portion in a radial direction thereof, and an inner portion disposed on an inside of the elastic portion in the radial direction thereof, the outer portion is adjacent to the outer portion of an adjacent elastic unit, the inner portion is adjacent to the inner portion of the adjacent elastic unit, and a slit is formed between the plurality of elastic portions.

The utility model discloses a refrigeration linear compressor spring assembly, which relates to the technical field of linear compressors and comprises a piston body, a protection mechanism is sleeved on the surface of the piston body, a first mounting plate is sleeved on the surface of the piston body, and a second mounting plate is fixedly connected on the surface of the protection mechanism. One side of the first mounting plate is fixedly connected with a limiting mechanism, two symmetrically-arranged cavities are formed in the first mounting plate, through the arrangement of the protection mechanism, the effect of protecting the piston body is achieved, the piston body is not prone to damage, the service life of the piston body is prolonged, and through the arrangement of the limiting mechanism, the piston body is prevented from being damaged. The piston body and the protection mechanism are limited, the stability of the piston body in the working process is improved, the spring assembly is not prone to bending deformation, meanwhile, the piston body is fixed more firmly, and noise generated by the compressor in the working process is reduced.

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.

A linear compressor (100) having a self-aligning coupler (200), comprising a drive coil (122), a mover, a piston (130) and the coupler (200). The mover is adjacent to the drive coil (122). The drive coil (122) is operable to enable the mover to reciprocate relative to the drive coil (122). The piston (130) has a piston head (132) and a cylindrical side wall (134), an inner surface (138) of the cylindrical sidewall (134) defining a ball socket (139). The coupler (200) extends between the mover and the piston (130), and the coupler (200) comprises a flexible mounting member (210) and a ball head (220).

The invention relates to the technical field of compressors, in particular to a linear motor of a linear compressor and the linear compressor, a rotor assembly comprises main magnetic steel, and the main magnetic steel reciprocates under the action of a magnetic field excited after a stator assembly is electrified; the electromagnetic spring comprises a first electromagnetic spring and a second electromagnetic spring which are arranged on the two axial sides of the main magnetic steel, and the direction of the spring resultant force of the first electromagnetic spring and the second electromagnetic spring is opposite to the displacement direction of the main magnetic steel. The direction of spring resultant force of the electromagnetic spring is opposite to the displacement direction of the main magnetic steel, so that the main magnetic steel is always subjected to restoring force towards a reciprocating motion center in the motion process, a compression piston of the linear compressor can be assisted to automatically return to the center, the piston offset resistance of the linear compressor is improved, and the cylinder collision risk is effectively reduced; and the electromagnetic spring does not have the material fatigue fracture risk of a traditional mechanical spring and can normally work for a long time at the demagnetization temperature, and the reliability is further improved.

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.

The present invention relates to the technical field of compressors, and discloses a linear compressor, comprising: a compressor core, the compressor core includes a linear motor, a cylinder, a piston and a leaf spring assembly, the cylinder is arranged in the cylinder of the inner stator of the linear motor, the piston is arranged in the cylinder, the cylinder, the inner stator and the piston are coaxially arranged, leaf spring assemblies are respectively fixedly arranged at both ends of the linear motor, both ends of the piston respectively penetrate out of the cylinder and are supported and connected to the corresponding leaf spring assemblies, so that the piston floats inside the cylinder. The linear compressor provided by the present invention arranges the cylinder and the piston in the cylinder of the inner stator of the linear motor, which can effectively utilize the internal space of the motor and is beneficial to reducing the size of the compressor; in addition, the piston is supported by the bilateral leaf spring assemblies, and the piston floats inside the cylinder, realizing non-contact reciprocating motion of the piston and the cylinder, increasing the reliability during the piston movement, reducing the vibration of the compressor and reducing the vibration noise.

The utility model discloses a compression part structure and a linear compressor, which belong to the technical field of compressors, the compression part structure comprises a cylinder assembly and a piston assembly, the cylinder assembly is sleeved outside the piston assembly, the piston assembly can slide relative to the cylinder assembly, and the cylinder assembly and the piston assembly are integrated. The integrated piston assembly and the integrated air cylinder assembly are coaxially assembled. The utility model further discloses a linear compressor. According to the linear compressor, the integrated piston assembly and the integrated air cylinder assembly are coaxially assembled, coaxial assembly of five parts is reduced to two parts, the assembly requirement is lowered, the coaxial assembly efficiency is improved, meanwhile, the integrated design is more beneficial to batch production and manufacturing, the production efficiency is improved, the axial length of the linear compressor can be reduced, and the production cost is reduced. And miniaturization design of the compressor is facilitated.

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 present invention provides a piston and a linear compressor. The piston includes a piston body, a first air passage, a second air passage, a first air valve, a second air valve, and a pneumatic bushing. An air cavity is formed inside the piston body. The first end of the first air passage and the first end of the second air passage are both communicated with the air cavity. The second end of the first air passage is formed at one end of the piston body, and the second end of the second air passage is formed at the other end of the piston body. The pneumatic bushing is sleeved on the side wall of the piston body. The air cavity is communicated with the inner side surface of the pneumatic bushing, and a plurality of throttle air holes are formed on the side wall of the pneumatic bushing. The present invention realizes the non-contact operation of the piston in the cylinder, greatly reduces the axial dimension of the linear compressor, reduces the clearance leakage generated by the high-pressure gas between the cylinder and the piston, and effectively improves the efficiency of the linear compressor.

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 ultralow-temperature refrigerator comprises the pulse tube refrigerator, the thermosiphon and an ultralow-temperature refrigerator heat insulation shell, and the pulse tube refrigerator comprises an oil-free linear compressor, a connecting pipe, an after-stage cooler, a heat regenerator, a cold end heat exchanger, a pulse tube, a hot end heat exchanger, an inertia pipe and a pulse tube refrigerator gas reservoir. The thermosiphon comprises a thermosiphon air reservoir, a thermosiphon connecting pipe, a thermosiphon descending section and a thermosiphon ascending section. By utilizing the advantages of environmental protection, energy conservation and no horizontal vibration of the linear opposed pulse tube refrigerating machine, the problems of high energy consumption of a traditional cascade steam compression refrigerating system and unstable vibration operation of other novel refrigerating machines are solved. And the problem of low heat exchange efficiency caused by insufficient heat exchange is solved by utilizing the bent pipeline at the descending section of the thermosiphon. The problem that the ultralow-temperature refrigerator is unstable and unsafe when the refrigerating machine is shut down is solved by utilizing the advantage that the thermosiphon air reservoir is added to relieve overlarge pressure in the thermosiphon when the refrigerating machine is shut down.

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 invention discloses a linear compressor three-section type magnetic steel bonding tool and a manufacturing method thereof. The linear compressor three-section type magnetic steel bonding tool comprises a bottom plate, a center fixing base, a fixing base mechanism, magnetic steel and a magnetism isolating ring. The bottom plate is fixedly connected with the center fixing seat, and the fixing seat mechanism is arranged on the outer side of the center fixing seat in a sleeving mode. The magnetic steel comprises main magnetic steel and auxiliary magnetic steel, the fixing seat mechanism comprises a main magnetic steel fixing seat assembly and an auxiliary magnetic steel fixing seat assembly, the main magnetic steel is fixedly arranged between the main magnetic steel fixing seat assembly and the central fixing seat, and the auxiliary magnetic steel is fixedly arranged between the auxiliary magnetic steel fixing seat assembly and the central fixing seat; wherein the magnetic isolation ring is arranged between the main magnetic steel and the auxiliary magnetic steel, and the magnetic isolation ring sleeves the outer side of the central fixing seat and is fixedly connected with the main magnetic steel or the auxiliary magnetic steel, so that the manufacturing precision of the magnetic steel is improved, and the structure is firmer.

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.

The invention relates to a linear compressor (1) with a linear electric motor comprising a stator (2) with a coil (3) and a mover (4), wherein the mover (4) has a magnet ring (5) made of a permanent magnet, a yoke (6) for distributing the magnetic field and a cylinder (7), wherein a first wave retaining ring (8) is arranged in a first circular groove (9) in the yoke (6) next to the magnet ring (5).

The utility model discloses a rotor assembly of a linear compressor, which belongs to the technical field of compressors and comprises a main magnetic steel ring, an auxiliary magnetic steel ring and a framework, two ends of the main magnetic steel ring are connected with the auxiliary magnetic steel ring through pins, the main magnetic steel ring is fixedly connected with the auxiliary magnetic steel ring, and one end, far away from the main magnetic steel ring, of the auxiliary magnetic steel ring is connected with the framework through a pin. And the auxiliary magnetic steel ring is fixedly connected with the framework. According to the utility model, the main magnetic steel ring, the auxiliary magnetic steel ring and the skeleton are connected through the pins, the bonding strength of the glue is further improved, the overall strength of the rotor assembly is enhanced, and when the rotor assembly is subjected to radial force and axial thrust of the magnetic steel, the overall magnetic steel ring does not have collapse of the magnetic steel sheets.

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.

A linear compressor includes a cylinder, a piston axially reciprocating in the cylinder, a first muffler unit coupled to the piston, a back cover that is disposed at a rear of the piston and defines an opening at a radially central area, and a second muffler unit coupled to the opening. The first muffler unit includes an inner guide disposed in the piston and a first intake muffler disposed at a rear of the inner guide. The second muffler unit includes a second intake muffler that is in fluid communication with the first intake muffler and is coupled to the opening, and a muffler body surrounding the second intake muffler. The second intake muffler includes a coupling portion that is disposed at a rear of the second intake muffler and has a shape corresponding to the opening.

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 present invention discloses a miniature, compact, integrated linear Stirling refrigerator, comprising a cold finger assembly, a linear compressor assembly, and an integrated base assembly. The cold finger assembly and the linear compressor assembly are mounted on the integrated base assembly in a T-shaped configuration. The present invention utilizes a compact structure in which the cold finger assembly and the linear compressor are mounted together on the integrated base assembly, with the cold finger assembly radially embedded within the linear compressor. This facilitates installation and removal by the user. Compared to a split-type Stirling refrigerator, the present invention eliminates the need for a connecting pipe structure, reduces the dead volume of the refrigerator, and improves the cooling efficiency of the refrigerator.