CN110259663B

CN110259663B - Novel moving-magnet type reciprocating linear compressor

Info

Publication number: CN110259663B
Application number: CN201910556411.1A
Authority: CN
Inventors: 陈洪月; 周加明; 陈洪岩; 赵志群
Original assignee: Liaoning Technical University
Current assignee: Liaoning Technical University
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-08-14
Anticipated expiration: 2039-06-25
Also published as: CN110259663A

Abstract

The invention provides a novel moving magnet type reciprocating linear compressor, which comprises a sealed shell, a rotor assembly and a coil frame assembly, wherein the rotor assembly is arranged on the sealed shell; the rotor assembly comprises a piston and a magnetic ring embedded in a groove of the piston, the left end of the piston is elastically supported on the left inner wall of the sealing shell through a front compression spring and a spring middle support frame, and the right end of the piston is elastically supported on the right inner wall of the sealing shell through a rear compression spring and a cylinder fixing frame; the coil is wound in the coil frame assembly, and the magnetic ring on the piston makes reciprocating linear motion in the alternating magnetic field generated in the coil frame assembly, so that the piston compresses gas to work. According to the invention, the magnetic ring is embedded into the piston, so that the internal size is reduced, the air gap is reduced, the specific thrust of the compressor is increased, and the compression springs are arranged on the two sides of the piston, so that the resonance frequency of the compressor is reached, and the working efficiency of the compressor can be greatly improved. The compressor has the advantages of compact structure, stable connection, high operation efficiency, long service life and good popularization and application values.

Description

Novel moving-magnet type reciprocating linear compressor

Technical Field

The invention relates to the technical field of refrigeration equipment, in particular to a novel moving magnet type reciprocating linear compressor.

Background

With the improvement of the scientific and technological level in the world and the rapid development of economy, the refrigeration device is applied to the front of various advanced technologies, and has huge market potential. The compressor is the core and heart of the refrigeration system and is also the mechanical device that compresses and raises the pressure of air, refrigerant or other various working gases. Compressors have been widely used in industrial equipment such as refrigerators and air conditioners.

A compressor is a power source of a refrigerating apparatus, and is roughly classified into a reciprocating compressor in which a compression space for sucking or discharging a working gas is formed between a piston linearly reciprocating inside a cylinder to compress a refrigerant, and a rotary compressor; in the rotary compressor, a compression space for sucking or discharging a working gas is formed between an eccentrically rotating roller and a cylinder, and the roller eccentrically rotates along an inner wall of the cylinder to compress a refrigerant.

The existing compressor has complex structure and unstable operation, and the cost of the compressor is high, thus the use requirement of durability can not be met.

Disclosure of Invention

In view of the above technical problems, an object of the present invention is to provide a novel moving-magnet reciprocating linear compressor, which has a reasonable structure and stable operation, and simultaneously reduces the cost of the compressor and meets the use requirement of durability.

In order to achieve the purpose, the invention provides a novel moving magnet type reciprocating linear compressor, which comprises a sealed shell, a rotor assembly and a coil frame assembly, wherein the rotor assembly and the coil frame assembly are positioned in the sealed shell;

the rotor assembly comprises a piston and a magnetic ring, the piston is positioned on the central axis of the sealed shell, the magnetic ring is embedded in a groove of the piston, the left end of the piston is elastically supported on the left inner wall of the sealed shell through a front compression spring and a spring middle support frame, and the right end of the piston is elastically supported on the right inner wall of the sealed shell through a rear compression spring and a cylinder fixing frame;

the coil frame assembly is fixed on the periphery of the piston through the cylinder fixing frame, a coil is wound in the coil frame assembly, and a magnetic ring on the piston makes reciprocating linear motion in an alternating magnetic field generated inside the coil frame assembly, so that the piston compresses gas to work, and low-temperature and low-pressure refrigerant gas is compressed into high-temperature and high-pressure refrigerant gas.

Furthermore, the wire wrap frame assembly comprises four quarter arc wire wrap frames, a coil positioned in the middle of the arc wire wrap frames, and a wire wrap frame locking ring for fixing the arc wire wrap frames together;

the upper part of each arc-shaped wire coil frame is provided with symmetrical rectangular flanges, the lower part of each arc-shaped wire coil frame is provided with symmetrical rectangular grooves, and the side surface of each arc-shaped wire coil frame is provided with an arc-shaped groove for placing the locking ring of the wire coil frame;

the middle of each arc wire wrapping frame is provided with an oval handle rod for winding the coil.

Optionally, an air inlet silencer is arranged in the left cavity of the piston, the right cavity of the piston is in transition fit with the cylinder, and an exhaust silencer is arranged in the cylinder.

Furthermore, the outer surface of the piston is provided with an annular groove for placing a magnetic ring, the left end face of the piston is provided with four threaded holes in threaded connection with the air inlet silencer baffle, and the rightmost side of the piston is provided with an annular flange for supporting the rear compression spring;

a baffle plate for dividing the interior of the piston into a left cavity and a right cavity is formed in the piston; eight air inlets are uniformly distributed on the baffle plate and are blocked by an air inlet valve plate under normal air pressure;

the baffle has a piston shaft extending centrally within the left side cavity.

Preferably, the intake silencer consists of a left part and a right part;

the left end face of the left part is provided with three crescent grooves and an axle hole matched with the piston shaft rod, the center position and two ends of the right end face of the left part are provided with first step grooves, and a circular cavity and an internal baffle are arranged in the first step grooves;

the inside of right side part has ring shape cavity, left side baffle and right side baffle, have three crescent recess on the baffle of right side and carry out the complex shaft hole with the piston shaft pole, the central point of right side part right-hand member face put with both ends open have with the first step groove of left side part carries out the complex second step groove.

Preferably, the exhaust silencer consists of three parts, namely a left part, a middle part and a right part;

the left side of the left part is a circular end face, the right end face of the left part is provided with a stepped groove, and an intermediate baffle inside the left part is provided with 4 through holes which are symmetrically distributed;

the left end face of the middle part is provided with a stepped groove, a middle baffle plate in the middle part is provided with 4 through holes which are symmetrically distributed, and the right end face of the middle part is provided with 4 threaded holes which are symmetrically distributed;

the right part is formed by transitionally connecting a left cylinder and a right cylinder through a circular truncated cone-shaped cylinder, and partial external threads are formed outside the left cylinder and are used for being in threaded connection with a threaded hole in the center of the end face of the right side of the middle part.

Furthermore, the cylinder is cylindrical and has an inner cylinder cavity inside, the left end face of the cylinder is provided with four through holes which are symmetrically distributed, the left side face of the inner cylinder cavity is provided with a circular groove, the center position of the circular groove is provided with a threaded hole for fixing an exhaust valve plate, and the inner cylinder cavity and the exhaust silencer are arranged in a transition fit manner;

the right end face of the air cylinder is flush with the right end face of the middle part, 4 threaded holes which are symmetrically distributed are formed in the right end face of the air cylinder, and the air cylinder is fixed to the air cylinder fixing frame through the slotted cylindrical head screws in threaded connection with the threaded holes.

Preferably, the left end of the piston shaft rod is in threaded connection with a spring connecting shaft rod, the middle part of the spring connecting shaft rod is a polished rod, the left side external thread of the spring connecting shaft rod is in threaded connection with a spring locking nut, and the right side external thread of the spring connecting shaft rod is in threaded connection with the internal thread of the piston shaft rod;

and a correcting spring for adjusting the position of the piston is arranged between the spring locking nut and the left end of the piston shaft rod.

Optionally, the spring middle support frame is in a shape of being flat at the bottom and protruding at the top, the left ear and the right ear of the spring middle support frame are provided with four symmetrically distributed threaded holes, and the spring middle support frame and the left shell of the sealed shell are fixed by using an inner hexagon screw to be in threaded connection with the threaded holes;

the end face of the boss of the spring middle support frame is provided with an annular boss corresponding to the annular boss of the air inlet silencer baffle, and the front compression spring is supported between the annular boss and the annular boss;

the center position of boss terminal surface is opened has with spring coupling axostylus axostyle complex shaft hole, the terminal surface is formed with left side boss and the right side boss that is used for fixed correction spring about the shaft hole.

Furthermore, the cylinder fixing frame is cylindrical, and the interior of the cylinder fixing frame is divided into a left cavity and a right cavity by a middle baffle;

the left end face of the air cylinder fixing frame is fixed at the right end of the solenoid frame assembly, and the right end face of the air cylinder fixing frame is attached to the right side shell of the sealing shell;

the middle baffle is provided with 8 symmetrically distributed threaded through holes, wherein 4 threaded through holes are aligned with the threaded holes on the right end surface of the cylinder, and the fixed connection between the cylinder and the cylinder fixing frame is realized through the threaded connection between slotted cylindrical head screws and the threaded through holes; the other 4 threaded through holes are aligned with the threaded holes on the right end face of the middle part, and the exhaust silencer and the air cylinder fixing frame are fixed by threaded connection of slotted cylindrical head screws and the threaded through holes;

the left side of the middle baffle is provided with a circular boss, the rear compression spring is supported between the annular flange of the right end face of the piston and the circular boss, and the center of the middle baffle is provided with a through hole in clearance fit with the right part.

Therefore, the novel moving-magnet type reciprocating linear compressor disclosed by the invention adopts a moving-magnet type structure, simultaneously optimizes the structure of the conventional compressor, has a reasonable structure, reduces the size and the cost, reduces the air gap between the piston and the cylinder, increases the specific thrust, and meets the use requirements of energy conservation, high efficiency and durability. Through with the magnetic ring embedding piston in, reduce inside dimension, reduce the air gap, increase compressor specific thrust, place pressure spring in piston both sides simultaneously, make it reach compressor resonant frequency, can greatly improve the work efficiency of compressor. According to the invention, through carrying out structural optimization on a plurality of parts, the effects of compact structure, stable connection, high operation efficiency and long service life of the compressor are realized, and the compressor has remarkable progress and good popularization and application values for the prior art.

Drawings

FIG. 1 is a schematic sectional view of a compressor according to the present invention;

FIG. 2 is a perspective view of a quarter portion of the coil frame of the present invention;

FIG. 3 is a perspective view of the overall structure of the coil frame of the present invention;

FIG. 4 is a perspective view of the general construction of the piston of the present invention, wherein (a) is one state and (b) is another state;

FIG. 5 is a cross-sectional view of the general construction of the piston of the present invention;

FIG. 6 is a schematic structural view of a left side part of the intake silencer of the present invention, wherein (a) is a perspective view and (b) is a front view; (c) is a sectional view;

FIG. 7 is a schematic structural view of a right side part of the intake silencer of the present invention, wherein (a) is a perspective view and (b) is a front view; (c) is a sectional view;

FIG. 8 is a perspective view of the general structure of the intake silencer of the present invention;

FIG. 9 is a perspective view of the intake silencer baffle of the present invention;

FIG. 10 is a perspective view of the spring connecting shaft of the present invention;

FIG. 11 is a perspective view of the spring lock nut of the present invention, wherein (a) is one state and (b) is another state;

FIG. 12 is a perspective view of the spring intermediate support of the present invention, wherein (a) is one state and (b) is another state;

FIG. 13 is a perspective view of the cylinder of the present invention, wherein (a) is one state and (b) is another state;

FIG. 14 is a perspective view showing the structure of the left side part of the exhaust muffler of the present invention, wherein (a) is one state and (b) is the other state;

FIG. 15 is a perspective view of the structure of an intermediate part of the exhaust muffler of the present invention, wherein (a) is one state, (b) is another state, and (c) is a sectional view;

FIG. 16 is a perspective view of the right side part of the exhaust muffler of the present invention;

fig. 17 is a schematic structural view of the exhaust muffler of the present invention, in which (a) is a perspective view of the overall structure and (b) is a sectional view;

fig. 18 is a perspective view showing the overall structure of the cylinder holder of the present invention, wherein (a) is one state and (b) is the other state;

FIG. 19 is a perspective view of the intake valve plate of the present invention;

FIG. 20 is a perspective view of the exhaust valve plate of the present invention;

FIG. 21 is a perspective view of the left side housing construction of the present invention;

FIG. 22 is a schematic structural view of the middle housing of the present invention, wherein (a) is a perspective structural view and (b) is a sectional view;

FIG. 23 is a perspective view of the right side housing of the present invention;

FIG. 24 is a perspective view of the seal housing of the present invention, wherein (a) is a perspective view of the overall structure and (b) is a sectional view;

FIG. 25 is a perspective view of the construction of the magnet ring of the present invention;

fig. 26 is a sectional view showing an inner structure of a compressor according to the present invention;

fig. 27 is a general structural view of a compressor of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived from the embodiments of the present invention by a person skilled in the art without any creative effort, should be included in the protection scope of the present invention.

It should be noted that all the directional indicators (such as outer, inner, left and right … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the figure), and if the specific posture is changed, the directional indicator is changed accordingly. Where "left" corresponds to the left side in fig. 1 and "right" corresponds to the right side in fig. 1.

Referring to fig. 1 to 27, the novel moving magnet type reciprocating linear compressor of the present invention is described in detail, and the novel moving magnet type reciprocating linear compressor of the present invention adopts a moving magnet type scheme to implement reciprocating linear type work doing in the compressor, and is often applied to refrigeration equipment such as air conditioners, refrigerators, and the like.

The novel moving magnet type reciprocating linear compressor is internally provided with components for compressing refrigerant, the sealed

shells

22, 23 and 24 are sealed containers, and the sealed

shells

22, 23 and 24 are internally filled with low-pressure refrigerant. The novel moving magnet type reciprocating linear compressor comprises a rotor assembly, a spring middle support frame 3, a cylinder 13, an exhaust valve plate 14,

exhaust silencers

15, 16 and 17, a cylinder fixing frame 18,

coil frame assemblies

19, 20 and 21, sealing

shells

22, 23 and 24, an air inlet pipe 25, an exhaust pipe 26 and connecting

screws

27, 28, 29 and 30. The sealed shell of the compressor of the invention is divided into three parts, namely a left shell 22, a middle shell 23 and a right shell 24.

The rotor component comprises a spring locking nut 1, a spring connecting shaft rod 2, a spring middle support frame 3, a front compression spring 4, an air inlet silencing baffle 5, a piston 6, an air inlet silencer 300, an air inlet valve plate 9, a magnetic ring 10, a correcting spring 11 and a rear compression spring 12.

Describing the structure of the

bobbin assembly

19, 20, 21 in detail with reference to fig. 2, the bobbin assembly of the present invention is formed by fixing four quarter arc bobbins 100 (herein referred to as small bobbins) together by a bobbin locking ring 21, each small bobbin 100 has symmetrical rectangular flanges 102 at the upper part and symmetrical rectangular grooves 101 at the lower part, and the small bobbin 100 has an arc groove 103 at the side for placing the bobbin locking ring 21, and an oval handle bar 104 is provided in the middle of each small bobbin 100, and the oval handle bar 104 is used to make the coil 105 easier to mount, and make the structure between the coil 105 and the handle bar 104 compact and efficient; where the oval shaped handle 104 is positioned at a depth from both the inner edge 106 and the outer edge 107 of the small coil form 100 that allows sufficient space to wind the desired number of turns of the coil 105 depending on the power requirements of the compressor.

Describing the assembly of the wire bag frame in detail with reference to fig. 3, the wire bag frame is installed by assembling a circular wire bag frame 99 by placing the upper rectangular flange 102 of each small wire bag frame 100 into the rectangular groove 101 of the lower part of another small wire bag frame to cross each other, and then locking by the wire bag frame locking ring 21, finally forming the whole wire bag frame. The left side of the former (i.e. the side of the former 21) is secured by an annular boss 236 within the intermediate housing 23 and the right side of the former is secured by the cylinder mount 18. The number of turns of the coil 105 on the coil frame is determined according to the power requirement of the compressor, and when the determined number of turns of the coil 105 is known, the coil 105 with the determined number of turns is wound on the handle 104 of each small coil frame, then the small coil frames 100 with the coil 105 are assembled, and finally the coil frame whole body with the coil is formed.

Describing the structure of the piston 6 in detail with reference to fig. 4 and 5, the piston 6 of the present invention is a core part of a compressor, and the outer surface of the piston 6 is provided with an annular groove 201 for placing the magnetic ring 10, and the annular groove 201 can be used for placing two symmetrical magnetic rings 10, as shown in fig. 25. The left end face 202 of the piston 6 has four screw holes 203 for screw-coupling with the intake silencer baffle 5, and the rightmost side of the piston 6 is provided with an annular flange 204 for supporting the rear hold-down spring 12.

The interior of the piston 6 is divided into two parts, the left side is a left cavity 208 formed by the inner surface 205 of the piston and the left side of the baffle 206, the piston shaft 207 is a right cavity 209 formed by the inner surface 205 of the piston and the right side of the baffle 206, and the piston shaft 207 extends inside the left cavity 208. The left cavity 208 is used for placing the air inlet silencer 300, the right cavity 209 is in transition fit with the air cylinder 13 to do work, eight air inlet holes 210 are regularly distributed on the internal baffle 206 of the piston 6, the air inlet holes 210 are blocked by the air inlet valve plate 9 under normal air pressure, the air inlet valve plate 9 is fixed with the threaded hole 212 on the right side of the baffle 206 through the slotted cylinder head screw 28 in a threaded connection mode, and when the internal air pressure is far lower than the external atmospheric pressure, the air inlet valve plate 9 is opened. Right side cavity 209 and cylinder 13 transition fit do work, and the inside piston shaft rod 207 of piston stretches out that the section inboard has internal thread 211 to be used for carrying out threaded connection with spring coupling axostylus axostyle 2, and spring coupling axostylus axostyle 2's both sides tip all has the external screw thread, and its left screw thread carries out threaded connection with spring lock nut 1, and the screw on right side carries out threaded connection with piston shaft rod 207.

The structure of the intake silencer is described in detail with reference to fig. 6, 7 and 8, the intake silencer of the invention is composed of a left part and a right part, the left end surface of the left part 301 of the intake silencer 300 is provided with three crescent grooves 302 and a shaft hole 303 matched with a piston shaft rod 207, the center position of the right end surface of the shaft hole is provided with stepped

grooves

311 and 312 which are respectively an annular groove 311 and an annular boss 312, the parts are internally provided with an annular cavity 304 and an internal baffle 305, the internal baffle 305 is provided with an annular groove 306, and the right end surface of the parts is provided with two stepped

grooves

307 and 308 which are respectively a groove 307 and a boss 308 and are used for being matched with the right part 315 of the intake silencer. The stepped

grooves

311, 312 and the stepped grooves 37, 38 constitute first stepped grooves.

The left end face of the right part 315 of the intake silencer 300 is also provided with two stepped

grooves

309 and 310, namely a groove 309 and a boss 310, for matching with the left part 301 of the intake silencer, the groove 37 of the left part 301 is in close contact with the boss 310 of the right part 315, but the groove 309 and the boss 38 are not attached to each other, and a gap is left. Stepped

grooves

313 and 314 are formed in the left end face of the shaft hole in the right part 315 and are respectively an annular boss 313 and an annular groove 314, the annular groove 311 of the left part 301 is tightly attached to the annular boss 313 of the right part 315, but the annular boss 312 is not attached to the annular groove 314, and a gap is reserved.

There is ring shape cavity 316 in the right side part 315, and it has ring shape recess 319 to open on the inside left baffle 320 of part, has three crescent recess 317 and carries out the shaft hole 303 that cooperates with piston shaft rod 207 on the inside right side baffle 318 of part, and right side baffle 318 has the certain distance apart from the part right-hand member face, here both makes things convenient for piston 6 to admit air and can realize better noise cancelling effect. The intake silencer 300 is matched with the piston shaft rod 207 through the shaft hole 303 of the intake silencer, and the thickness of the intake silencer 300 is consistent with the width of the left cavity 208 inside the piston, namely, the left end face 202 of the piston 6 is flush with the left end face of the intake silencer 300.

Describing the structure of the intake silencer baffle 5 in detail with reference to fig. 9, the intake silencer baffle 5 is provided with 4 threaded holes 53 regularly distributed, meanwhile, the center of the intake silencer baffle 5 is provided with a through hole 54, the intake silencer baffle 5 is arranged on the left side of the intake silencer 300, on one hand, the intake silencer 300 is fixed to move axially, and on the other hand, the left side of the intake silencer baffle 5 is provided with an annular boss 51 for providing a positioning position for installing the front compression spring 4; simultaneously, the air inlet silencer baffle plate 5 is provided with three crescent through holes 52, when the air inlet silencer baffle plate is installed, the crescent through holes 52 of the air inlet silencer baffle plate 5 are aligned with the crescent grooves 302 on the left end face of the air inlet silencer 300, meanwhile, the through holes 54 of the air inlet silencer baffle plate 5 penetrate through the piston shaft rod 207, and finally, the slotted cylinder head screws 30 penetrate through the threaded holes 53 of the air inlet silencer baffle plate 5 and the threaded holes 203 of the piston 6 to be in threaded connection, so that fixation is achieved.

As shown in fig. 10, the spring coupling shaft 2 of the present invention is composed of a left side external thread 210, a middle polish rod 220, and a right side external thread 230, wherein the diameter of the left side external thread 210 is smaller than that of the middle polish rod 220. The left side external thread 210 is in threaded connection with the spring lock nut 1, and the right side external thread 230 is in threaded connection with the internal thread 211 of the piston shaft rod 207, so that fixation is achieved. As shown in fig. 11, the spring lock nut 1 of the present invention has a threaded through hole 100 formed in the center thereof, a circular arc boss 101 formed on the right end surface thereof for supporting the correction spring 11, and a smooth flat surface 102 formed on the left end surface thereof.

Describing the structure of the middle spring support frame 3 in detail with reference to fig. 12, the middle spring support frame 3 of the present invention is in a shape of being flat at the bottom and convex at the top, the left and right ears have four threaded holes 31 distributed regularly and symmetrically, and the middle spring support frame 3 and the left shell 22 are fixed by using the socket head cap screws 27 to be in threaded connection with the threaded holes 31. The boss end face 33 of the spring middle support frame 3 is provided with an annular boss 32 with the same size as the annular boss 51 of the air inlet silencer baffle 5, and the two

annular bosses

32 and 51 are symmetrically distributed and used for supporting the front compression spring 4. The central point of boss terminal surface 33 puts and opens shaft hole 34 for spring intermediate strut 3 carries out the shaft hole cooperation with spring coupling axostylus axostyle 2, and the central point of shaft hole 34 puts and opens annular groove 35 for place lubricating grease, realize that the shaft hole is lubricated, reduce wearing and tearing. Meanwhile, annular bosses are processed on the left end face and the right end face of the shaft hole 34 and respectively comprise a left boss 36 and a right boss 37, the left boss 36 and the arc boss 101 of the spring locking nut 1 fix the left correction spring 11, the right boss 37 and the piston shaft rod 207 fix the right correction spring 11, and the piston can be located at an ideal position by adjusting the spring locking nut 1.

As shown in fig. 13, the cylinder 13 of the present invention is similar to a cylinder, four through holes 131 are symmetrically distributed on the left end surface of the cylinder 13, a circular groove 134 is formed on the left side surface of the cylinder inner cavity 132, and a threaded hole 133 (blind hole) is formed at the center position of the circular groove 134, the exhaust valve plate 14 is fixed by the slotted cylinder head screw 28, the four through holes 131 are blocked by the exhaust valve plate 14 in a conventional state, and when the exhaust pressure is greater than the valve plate opening pressure, the exhaust valve plate 14 is opened. The cylinder cavity 132 is in transition fit with the exhaust silencer 150, so that the exhaust silencer 150 is convenient to mount, and the right end face 135 of the cylinder 13 is flush with the right end face of the exhaust silencer middle part 16. Meanwhile, 4 threaded holes 136 which are symmetrically distributed are formed in the right end face 135 of the air cylinder 13, and the air cylinder 13 is fixed to the air cylinder fixing frame 18 through the threaded connection of the slotted cylinder head screws 29 and the threaded holes 136.

The structure of the exhaust muffler 150 will be described in detail with reference to fig. 14, 15, 16 and 17, and the exhaust muffler 150 of the present invention is composed of three parts, i.e., a left side part 15, a middle part 16 and a right side part 17. The left side of the left part 15 is a circular end face 151, the right end face of the left part is provided with a stepped groove which is an annular groove 152 and an annular boss 153, and the middle baffle 154 is provided with 4 through holes 155 which are symmetrically distributed. The left end face of the middle part 16 is provided with a stepped groove which is respectively an annular groove 161 and an annular boss 162, the middle baffle 163 is provided with 4 through holes 164 which are symmetrically distributed, the right side of the middle baffle 163 is provided with a cavity 165, the right end face 166 is provided with 4 threaded holes 167 which are symmetrically distributed, the exhaust silencer 150 is fixed with the cylinder fixing frame 18 by the threaded connection of the slotted cylinder head screw 30 and the threaded holes 167, and meanwhile, the center position of the right end face 166 is provided with a threaded hole 168 (communicated with the cavity 165) which is used for being in threaded connection with the external thread 171 on the left side of the right part 17 to realize the fixation. The right side part 17 is formed by transitionally connecting a left cylinder 172 and a right cylinder 174 through a circular truncated cone shaped cylinder 173, and the outer surface of the left cylinder 172 is provided with a partial external thread 171 for being in threaded connection with the threaded hole 168 of the middle part 16 to realize fixation.

As shown in fig. 18, the cylinder fixing frame 18 of the present invention is cylindrical, and the interior of the cylinder fixing frame is divided into a left cavity 182 and a right cavity 183 by a baffle 181, the left end face 184 of the cylinder fixing frame 18 is fixed on the wire bag frame, the right end face 185 of the cylinder fixing frame is attached to the right side housing 24, the middle baffle 181 is provided with 8 symmetrically distributed threaded through holes 186, wherein 4 threaded through holes 186 are aligned with the threaded holes 136 of the right end face of the cylinder, and the cylinder 13 and the cylinder fixing frame 18 are fixedly connected by the slotted cylinder head screws 29, the threaded through holes 186 and the threaded holes 136; meanwhile, 4 threaded through holes 186 are aligned with the threaded holes 167 on the right end face of the middle part 16 of the exhaust silencer 150, and the exhaust silencer 150 and the cylinder fixing frame 18 are fixed through the slotted cylinder head screws 30 in threaded connection with the threaded through holes 186 and the threaded holes 167. The left side of the middle baffle 181 of the cylinder fixing frame 18 is provided with a circular ring-shaped boss 187, the rear pressure spring 12 is supported by an annular flange 204 on the right end surface of the piston 6 and the circular ring-shaped boss 187 on the left side of the middle baffle 181, and the center position of the middle baffle 181 is provided with a through hole 188 which is in clearance fit with the right part 17 of the exhaust silencer 150.

As shown in fig. 19, the intake valve plate 9 of the present invention is a circular thin piece, the left end surface 190 of the intake valve plate is provided with 8 circular bosses 191 with equal thickness, the circular bosses 191 are used for shielding the intake holes 210 of the piston 6 in a normal state, meanwhile, the center of the intake valve plate 9 is provided with a through hole 192, and the slotted cylinder head screw 28 is in threaded connection with the threaded hole 212 on the right side of the baffle 206 through the through hole 192 to realize fixation. When the internal air pressure is far lower than the external atmospheric pressure, the air inlet valve plate 9 is opened. As shown in fig. 20, the air release valve plate 14 of the present invention is a circular thin member, the left end surface 140 of the air release valve plate is provided with 4 circular bosses 141 with equal thickness, the circular bosses 141 are used for shielding the air vent 131 of the air cylinder 13 in a normal state, meanwhile, the center of the air release valve plate 14 is provided with a through hole 142, the through hole 142 is used for passing through a slotted cylinder head screw, and the slotted cylinder head screw is in threaded connection with the threaded hole 133 in the middle of the air cylinder 13 through the through hole 142 to achieve fixation. When the internal pressure is greater than the discharge valve opening pressure, the discharge valve 14 opens.

The structure of the compressor casing (the

hermetic casings

22, 23, 24) will be described in detail with reference to fig. 21, 22, 23, 24. the compressor casing of the present invention is divided into three parts, i.e., a left casing 22, a middle casing 23, and a right casing 24. The left end surface 221 of the left side shell 22 is a circular plane, the right end surface 222 thereof is provided with an annular stepped groove which is an annular groove 223 and an annular boss 224, the right end surface 222 thereof is provided with 4 threaded holes 225 which are regularly and symmetrically distributed, and the left side shell 22 and the spring middle support 3 are fixed by the threaded connection of the inner hexagon screw 27, the threaded holes 225 and the threaded holes 31. The middle shell 23 is similar to a cylinder shape, the left side and the right side of the middle shell are both provided with annular stepped grooves, the left side of the middle shell is provided with an annular groove 231 and an annular boss 232, the annular groove 231 on the left side is tightly attached to the annular boss 224 of the left shell 22, and the outer sides of the middle shell and the left shell are connected and sealed through welding; the right side is provided with an annular groove 233 and an annular boss 234, the outer surface of the middle shell 23 is provided with an air inlet 235, the inside of the middle shell 23 is provided with an annular boss 236, the left and right annular stepped grooves of the middle shell 23 are respectively matched and connected with the stepped groove of the left shell 22 and the stepped groove of the right shell 24, and the annular boss 236 inside the shell and the cylinder fixing frame 18 realize the fixation of the wire wrapping frame 99 together. The right end surface 241 of the right side housing 24 is a circular plane, the left end surface 242 thereof is provided with an annular stepped groove which is an annular groove 243 and an annular boss 244, the annular boss 244 of the left end surface of the right side housing 24 is tightly attached to the annular groove 233 of the middle housing 23, and the outer side is connected and sealed with the middle housing 23 and the right side housing 24 by welding. And a through hole 245 which is clearance-fitted with the exhaust muffler 150 is formed at the center of the right casing 24.

In the invention, a permanent magnet (magnetic ring) is embedded in a groove of a piston and can pass through a wire wrapping frame, an air inlet silencing device is added in the piston and is fixed by a baffle, meanwhile, springs are arranged at the end parts of two sides of the piston, and the spring at the left side is supported by a spring middle supporting frame and a fixed baffle; the right spring is supported by a cylinder fixing frame and a piston. The invention keeps the coaxiality when the cylinder and the piston are installed, reduces the air gap and increases the specific thrust of the compressor.

The whole working process of the novel moving magnet type reciprocating linear compressor comprises the following steps: alternating current is connected through a coil of a coil frame of the compressor, an alternating magnetic field is generated inside the coil frame (if an electric signal is in a positive direction, the coil frame generates a magnetic field from an N pole to an S pole from top to bottom, otherwise, the S pole to the N pole is generated), the moving direction of a magnetic ring 10 on a piston 6 in the alternating magnetic field is constantly changed, the magnetic ring 10 is embedded in a groove of the piston 6, the moving direction of the piston 6 is consistent with that of the magnetic ring 10, the piston 6 does reciprocating linear motion in the left-right direction according to the change of the magnetic field, so that the work of compressed gas is realized, and the low-temperature and low-pressure refrigerant gas is compressed into high-temperature and high-pressure refrigerant gas by the motion.

In summary, the magnetic ring 10 is embedded into the piston 6, so that the internal size is reduced, the air gap is reduced, the specific thrust of the compressor is increased, and meanwhile, the compression springs are arranged on the two sides of the piston 6, so that the resonance frequency of the compressor is achieved, and the working efficiency of the compressor can be greatly improved. According to the invention, through carrying out structural optimization on a plurality of parts, the effects of compact structure, stable connection, high operation efficiency and long service life of the compressor are realized, and the compressor has remarkable progress and good popularization and application values for the prior art.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A novel moving magnet type reciprocating linear compressor is characterized by comprising a sealed shell (22, 23, 24), a rotor assembly and a coil frame assembly (19, 20, 21) which are positioned in the sealed shell (22, 23, 24);

the rotor assembly comprises a piston (6) positioned on the central axis of a sealing shell (22, 23, 24) and a magnetic ring (10) embedded in a groove of the piston (6), the left end of the piston (6) is elastically supported on the left inner wall of the sealing shell (22, 23, 24) through a front compression spring (4) and a spring middle support frame (3), and the right end of the piston (6) is elastically supported on the right inner wall of the sealing shell (22, 23, 24) through a rear compression spring (12) and an air cylinder fixing frame (18);

the coil frame assembly (19, 20, 21) is fixed on the periphery of the piston (6) through the cylinder fixing frame (18), a coil (105) is wound in the coil frame assembly (19, 20, 21), and the magnetic ring (10) on the piston (6) makes reciprocating linear motion in an alternating magnetic field generated in the coil frame assembly (19, 20, 21), so that the piston (6) compresses gas to do work, and the low-temperature and low-pressure refrigerant gas is compressed into high-temperature and high-pressure refrigerant gas;

an air inlet silencer (300) is arranged in a left cavity of the piston (6), the right cavity of the piston (6) is in transition fit with the cylinder (13), and an exhaust silencer (150) is arranged in the cylinder (13);

the exhaust silencer is characterized in that the cylinder (13) is cylindrical, an inner cylinder cavity (132) is formed in the cylinder (13), four through holes (131) are symmetrically distributed on the left end face of the cylinder (13), a circular groove (134) is formed in the left side face of the inner cylinder cavity (132), a threaded hole (133) used for fixing an exhaust valve plate (14) is formed in the center of the circular groove (134), and the inner cylinder cavity (132) and the exhaust silencer (150) are in transition fit arrangement;

the right end face (135) of the cylinder (13) is flush with the right end face of the middle part (16) of the exhaust silencer (150), 4 threaded holes (136) which are symmetrically distributed are formed in the right end face (135) of the cylinder (13), and the cylinder (13) is fixed with the cylinder fixing frame (18) through the threaded connection of the slotted cylindrical head screw (29) and the threaded holes (136).

2. The reciprocating linear compressor of moving magnet type according to claim 1, wherein the coil frame assembly (19, 20, 21) comprises four quarter arc coil frame (100), a coil (105) located at the middle position of the arc coil frame (100), a coil frame locking ring (21) for fixing the arc coil frame (100) together;

the upper part of each arc-shaped wire coil frame (100) is provided with a symmetrical rectangular flange (102), the lower part thereof is provided with a symmetrical rectangular groove (101), and the side surface thereof is provided with an arc-shaped groove (103) for placing the wire coil frame locking ring (21);

the middle of each arc wire wrapping frame (100) is provided with an oval handle (104) used for winding the coil (105).

3. The novel moving magnet type reciprocating linear compressor as claimed in claim 1, wherein the outer surface of the piston (6) is provided with an annular groove (201) for placing the magnetic ring (10), the left end surface (202) of the piston (6) is provided with four threaded holes (203) in threaded connection with the air intake silencer baffle (5), and the rightmost side of the piston (6) is provided with an annular flange (204) for supporting the rear compression spring (12);

a baffle plate (206) for dividing the interior of the piston (6) into a left cavity (208) and a right cavity (209) is formed in the piston (6); eight air inlets (210) are uniformly distributed on the baffle (206), and the air inlets (210) are blocked by an air inlet valve plate (9) under normal air pressure;

the baffle (206) has a piston shaft (207) in the center that extends inside the left cavity (208).

4. A new moving-magnet reciprocating linear compressor according to claim 3, characterized in that the intake silencer (300) is composed of a left side part (301) and a right side part (315);

the left end face of the left part (301) is provided with three crescent grooves (302) and a shaft hole (303) matched with the piston shaft rod (207), the center position and two ends of the right end face of the left part (301) are provided with first stepped grooves, and the inside of the left part is provided with a circular cavity (304) and an internal baffle (305);

the inside of right side part (315) has ring shape cavity (316), left side baffle (320) and right side baffle (318), have three crescent recess (317) on right side baffle (318) and carry out complex shaft hole (303) with piston shaft pole (207), the central point of right side part (315) right-hand member face puts and both ends open have with the first step groove of left side part (301) carries out the complex second step groove.

5. The reciprocating linear compressor of moving magnet type according to claim 3, wherein the exhaust silencer (150) is composed of three parts of a left side part (15), a middle part (16) and a right side part (17);

the left side of the left part (15) is a circular end face (151), the right end face of the left part is provided with stepped grooves (152 and 153), and a middle baffle (154) in the left part is provided with 4 through holes (155) which are symmetrically distributed;

the left end face of the middle part (16) is provided with stepped grooves (161, 162), a middle baffle (163) in the middle part is provided with 4 through holes (164) which are symmetrically distributed, and the right end face (166) of the middle part is provided with 4 threaded holes (167) which are symmetrically distributed;

the right side part (17) is formed by transitionally connecting a left cylinder (172) and a right cylinder (174) through a circular truncated cone-shaped cylinder (173), wherein the outer surface of the left cylinder (172) is provided with a part of external threads (171) for being in threaded connection with a threaded hole (168) in the center of the right end surface (166) of the middle part (16).

6. The novel moving magnet reciprocating linear compressor of claim 3, characterized in that the left end of the piston shaft rod (207) is connected with a spring connecting shaft rod (2) in a threaded manner, the middle part of the spring connecting shaft rod (2) is a polished rod, the left external thread (210) of the spring connecting shaft rod (2) is connected with the spring locking nut (1) in a threaded manner, and the right external thread (230) of the spring connecting shaft rod is connected with the internal thread (211) of the piston shaft rod (207) in a threaded manner;

and a correcting spring (11) for adjusting the position of the piston (6) is arranged between the spring locking nut (1) and the left end of the piston shaft rod (207).

7. The novel moving magnet type reciprocating linear compressor is characterized in that the spring intermediate support frame (3) is in a shape of flat lower part and convex upper part, the left ear and the right ear of the spring intermediate support frame have four symmetrically distributed threaded holes (31), and the spring intermediate support frame (3) is fixed with the left shell (22) of the sealed shell (22, 23, 24) through threaded connection of the threaded holes (31) and the hexagon socket head cap screws (27);

the boss end face (33) of the spring middle support frame (3) is provided with an annular boss (32) corresponding to the annular boss (51) of the air inlet silencer baffle plate (5), and the front compression spring (4) is supported between the annular boss (51) and the annular boss (32);

the center position of boss terminal surface (33) is opened has with spring coupling axostylus axostyle (2) complex shaft hole (34), the left and right terminal surface in shaft hole (34) is formed with left side boss (36) and right side boss (37) that are used for fixed correction spring (11).

8. The reciprocating linear compressor of moving magnet type according to claim 5, wherein the cylinder holder (18) is cylindrical in shape, and its interior is divided into a left chamber (182) and a right chamber (183) by an intermediate baffle (181);

the left end face (184) of the cylinder fixing frame (18) is fixed at the right end of the coil frame assembly (19, 20, 21), and the right end face (185) of the cylinder fixing frame (18) is attached to the right side shell (24) of the sealing shell (22, 23, 24);

the middle baffle (181) is provided with 8 symmetrically distributed threaded through holes (186), wherein 4 threaded through holes (186) are aligned with the threaded holes (136) on the right end surface of the cylinder (13), and the cylinder (13) is fixedly connected with the cylinder fixing frame (18) through the threaded connection of slotted cylindrical head screws (29), the threaded through holes (186) and the threaded holes (136); the other 4 threaded through holes (186) are aligned with the threaded holes (167) on the right end face of the middle part (16), and the exhaust silencer (150) and the cylinder fixing frame (18) are fixed through the threaded connection of the slotted cylindrical head screws (30), the threaded through holes (186) and the threaded holes (167);

the left side of the middle baffle plate (181) is provided with a circular boss (187), the rear compression spring (12) is supported between an annular flange (204) on the right end face of the piston (6) and the circular boss (187), and the center of the middle baffle plate (181) is provided with a through hole (188) in clearance fit with the right part (17).