Efficient energy-saving compressor suitable for variable-frequency permanent magnet motor

Abstract

The invention discloses an efficient energy-saving compressor suitable for a variable-frequency permanent magnet motor, and belongs to the technical field of compressors. An efficient energy-saving compressor suitable for a frequency conversion permanent magnet motor comprises a cylinder body, an installation cavity is formed in the cylinder body, piston cavities communicated with the installation cavity are formed in the two ends of the cylinder body, cylinder covers for sealing the piston cavities are detachably arranged at the two ends of the cylinder body, and the piston cavities at the two ends are arranged in parallel in a staggered mode in the horizontal direction; an air cavity is formed in the cylinder cover, and an exhaust pipeline and an air inlet pipeline are arranged at the top and the bottom of the cylinder cover respectively. Through the arrangement of the cylinder body, the driving assembly and the piston assemblies, the two piston assemblies can be synchronously driven to reciprocate in the piston cavities in the same direction, the gas processing capacity of the compressor is improved, and gas can be effectively compressed within a shorter time. The piston cavities at the two ends are arranged in parallel in a staggered mode in the horizontal direction, the flowing path of gas is optimized, energy loss of the gas in the compression process is reduced, and therefore the compression efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a high-efficiency and energy-saving compressor suitable for variable-frequency permanent magnet motors. Background Art

[0002] The compressor is a driven fluid machine that boosts low-pressure gas to high-pressure gas and is the heart of the refrigeration system. It sucks low-temperature, low-pressure refrigerant gas from the suction pipe, compresses it through the operation of the variable-frequency permanent magnet motor to drive the piston, and then discharges high-temperature, high-pressure refrigerant gas to the exhaust pipe, providing power for the refrigeration cycle.

[0003] Most of the hydraulic diaphragm gas compressors currently available on the market are only equipped with one inlet pipe and one exhaust pipe, resulting in a small compression displacement of the compressor, thereby causing low compression efficiency. Summary of the invention

[0004] The present invention provides a high-efficiency energy-saving compressor suitable for a variable-frequency permanent magnet motor, which can overcome certain or some defects of the prior art.

[0005] According to the present invention, a high-efficiency and energy-saving compressor suitable for a variable frequency permanent magnet motor comprises a cylinder body, a mounting cavity is formed inside the cylinder body, piston cavities communicating with the mounting cavity are formed at both ends of the cylinder body, and cylinder covers for sealing the piston cavities are detachably provided at both ends of the cylinder body, and the piston cavities at both ends are staggered and arranged in parallel in a horizontal direction;

[0006] An air cavity is formed inside the cylinder head, and an exhaust pipe and an intake pipe are respectively provided at the top and bottom of the cylinder head. An intake channel connecting the air cavity, the exhaust pipe and the second one-way valve is formed at the cylinder head. A first one-way valve and a second one-way valve are respectively provided in the intake channel, and the first one-way valve and the second one-way valve are oppositely arranged. A piston mechanism is provided in the installation cavity, and the piston mechanism has a driving assembly arranged at the installation cavity and two piston assemblies corresponding to the piston cavities at both ends, the piston assembly is used to separate the air cavity from the piston cavity, and the driving assembly is used to synchronously and unidirectionally drive the piston assembly to reciprocate along the piston cavity.

[0007] Through the arrangement of the cylinder body, the drive assembly and the piston assembly, the two piston assemblies can be driven synchronously and in the same direction to reciprocate in the piston cavity, thereby improving the gas processing capacity of the compressor and enabling the gas to be effectively compressed in a shorter time.

[0008] It can be understood that the piston cavities at both ends are arranged in parallel and staggered in the horizontal direction, which optimizes the flow path of the gas, reduces the energy loss of the gas during the compression process, and thus improves the compression efficiency.

[0009] Preferably, the drive assembly includes a fixed seat arranged at the installation cavity, a crankshaft is rotatably provided at the fixed seat, an extension shaft is provided at the axial direction of the crankshaft and passes through the cylinder body, the extension shaft is used to connect to the variable frequency permanent magnet motor, and the two piston assemblies are rotatably arranged at the crankshaft.

[0010] Through the above structure, the two piston assemblies can perform reciprocating work synchronously, thereby improving the compression amount and compression efficiency of the gas.

[0011] Preferably, the piston assembly includes a piston arm arranged at the crankshaft, a connecting seat is rotatably provided at the end of the piston arm, a piston member that cooperates with the inner wall of the piston cavity is detachably provided at the connecting seat, a connecting rod is detachably provided at the end of the piston member away from the connecting seat, and a diaphragm is formed at the connecting rod and arranged between the cylinder body and the cylinder head.

[0012] Through the setting of the piston assembly, the piston member moves back and forth in the piston cavity, and at the same time the diaphragm is driven to deform through the connecting rod, thereby achieving gas compression and ensuring the high efficiency and stability of the gas during the compression process.

[0013] It can be understood that the coordinated arrangement of the piston member, the piston cavity and the diaphragm allows the piston member and the diaphragm to move back and forth synchronously when the gas is compressed, ensuring the sealing and stability of the gas during the compression process. Even if either the piston member or the diaphragm is damaged, the normal operation of the device can be guaranteed, thereby improving the stability of the device.

[0014] Preferably, grooves are formed at opposite side walls of the cylinder body and the cylinder cover, a mounting area is formed between adjacent grooves, and an annular protrusion matching the mounting area is formed at the outer wall of the diaphragm.

[0015] By embedding the annular protrusion of the diaphragm into the installation area of ​​the cylinder body and the cylinder head, a close contact surface can be formed, thereby effectively preventing gas leakage during the compression process, which not only improves the sealing performance of the compressor, but also ensures efficient compression of the gas.

[0016] It can be understood that the diaphragm can be quickly installed and disassembled through the cooperation between the annular protrusion and the installation area, which not only simplifies the installation and maintenance process of the compressor, but also reduces the maintenance cost and time.

[0017] Preferably, a rubber sleeve is provided on the outer wall of the piston member, a first inner cavity and a second inner cavity are formed on the two side walls of the piston member along the axial direction of the cylinder body, and a plurality of through-holes communicating with the first inner cavity and the second inner cavity are formed on the outer wall of the piston member at equal intervals, wherein the plurality of through-holes communicating with the first inner cavity on the outer wall of the piston member and the plurality of through-holes communicating with the second inner cavity on the outer wall of the piston member are staggered;

[0018] A fixing ring is formed inside the first inner cavity and the second inner cavity. The fixing ring is provided with a plurality of extrusion pieces corresponding to the through openings at equal intervals along the circumferential direction. The extrusion pieces are used to extrude the rubber sleeve.

[0019] By opening a plurality of openings communicating with the first inner cavity and the second inner cavity at equal intervals on the outer wall of the piston, the extrusion members in the first inner cavity and the second inner cavity can act on the rubber sleeve, thereby achieving extrusion and sealing of the rubber sleeve.

[0020] Preferably, an extrusion cavity is formed inside the fixed ring, and a movable opening communicating with the extrusion cavity is formed on the corresponding sides of the piston member and the diaphragm. An extension tube communicating with the extrusion cavity is formed at the second inner cavity. A top block is slidably provided inside the extension tube, and an extrusion plate cooperating with the movable opening is slidably provided in the extrusion cavity. The extrusion plate is used to drive the extrusion member to extrude the rubber sleeve outward.

[0021] Through the combined action of the extrusion plate and the extrusion member, the rubber sleeve is effectively squeezed onto the piston cavity, thereby significantly improving the sealing performance between the piston member and the piston cavity.

[0022] Preferably, a through groove is formed at the outer wall of the extension tube, and the outer wall of the top block has a connecting portion that passes through the through groove, and a first hemispherical portion that matches the outer wall of the extension tube is formed between the connecting portions.

[0023] Through the coordinated arrangement of the connecting portion and the through groove, the top block can slide smoothly in the extension tube, thereby achieving stable squeezing of the rubber sleeve by the first hemispherical portion.

[0024] It can be understood that the provision of the first hemispherical portion enables the top block to better drive the hemispherical extrusion block during the sliding process, thereby reducing friction and wear.

[0025] Preferably, a second hemispherical portion is formed at one end of the extrusion cavity close to the top block, and a push rod corresponding to the first hemispherical portion is formed at the second hemispherical portion, and the push rod is used to drive the top block to slide along the through groove.

[0026] Through the above structure, after the rubber sleeve corresponding to the arc-shaped extrusion block in the first inner cavity is worn, the extrusion plate can squeeze the top block, so that the rubber sleeve corresponding to the arc-shaped extrusion block in the second inner cavity is squeezed outward, thereby forming a seal on the inner wall of the piston cavity, thereby increasing the service life of the device and further improving the stability of the device operation.

[0027] When the rubber sleeve portion corresponding to the arc-shaped extrusion block in the first inner cavity is normal, the rubber sleeve portion corresponding to the arc-shaped extrusion block in the second inner cavity is subjected to a small extrusion force, that is, the rubber sleeve portion corresponding to the arc-shaped extrusion block in the first inner cavity is only used for sealing. After the rubber sleeve portion corresponding to the arc-shaped extrusion block in the first inner cavity is gradually worn, the extrusion plate can extrude the top block, so that the rubber sleeve portion corresponding to the arc-shaped extrusion block in the second inner cavity is squeezed outward, thereby forming a seal on the inner wall of the piston cavity.

[0028] Preferably, the extrusion member includes a guide plate arranged at the side wall of the first inner cavity or the second inner cavity, a sliding rod is slidably provided between the guide plate and the fixed ring, one end of the sliding rod is provided with a hemispherical extrusion block that passes through the fixed ring and contacts the first hemispherical portion or the second hemispherical portion, the other end of the sliding rod is provided with an arc-shaped extrusion block that passes through the guide plate and corresponds to the through opening, a spring is provided between the fixed ring and the guide plate, and the spring is used to provide an elastic force to keep the arc-shaped extrusion block pressed tightly toward the through opening.

[0029] Through the synergistic effect of the hemispherical extrusion block and the arc-shaped extrusion block, all-round extrusion of the rubber sleeve can be achieved, thereby improving the uniformity and stability of the extrusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The figure is a schematic diagram of the overall structure of a high-efficiency and energy-saving compressor suitable for variable-frequency permanent magnet motors.

[0031] Figure 2 The figure is a schematic diagram of the overall top view cross-sectional structure of a high-efficiency and energy-saving compressor suitable for variable frequency permanent magnet motors.

[0032] Figure 3 The figure is a schematic diagram of the overall side cross-sectional structure of a high-efficiency and energy-saving compressor suitable for variable frequency permanent magnet motors.

[0033] Figure 4 The diagram is a schematic diagram of the piston mechanism structure of a high-efficiency energy-saving compressor suitable for a variable-frequency permanent magnet motor.

[0034] Figure 5 The figure is a schematic diagram of the side cross-sectional structure of a piston mechanism of a high-efficiency and energy-saving compressor suitable for a variable-frequency permanent magnet motor.

[0035] Figure 6 The present invention is a schematic diagram of the side cross-sectional structure of a piston assembly of a high-efficiency and energy-saving compressor suitable for a variable frequency permanent magnet motor.

[0036] Figure 7 The diagram is a front cross-sectional diagram of a piston assembly of a high-efficiency energy-saving compressor suitable for a variable-frequency permanent magnet motor.

[0037] 110, cylinder body; 120, cylinder head; 130, piston mechanism; 210, mounting cavity; 220, piston cavity; 230, air cavity; 240, intake passage; 310, first one-way valve; 320, second one-way valve; 330, exhaust pipe; 340, intake pipe; 410, fixing seat; 420, crankshaft; 430, piston assembly; 440, extension shaft; 510, piston arm; 520, connecting seat; 5 30. Piston member; 540. Connecting rod; 550. Diaphragm; 610. Rubber sleeve; 620. Fixing ring; 630. Guide plate; 640. Sliding rod; 650. Hemispherical extrusion block; 660. Spring; 670. Arc-shaped extrusion block; 710. First inner cavity; 720. Second inner cavity; 730. Through port; 740. Extension tube; 750. Extrusion cavity; 760. Extrusion plate; 770. Through slot; 780. Top block. DETAILED DESCRIPTION

[0038] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the embodiments. It should be understood that the embodiments are only for explaining the present invention and are not intended to limit it.

[0039] Example 1

[0040] See also Figure 1-7 The present embodiment provides a high-efficiency and energy-saving compressor suitable for a variable frequency permanent magnet motor, which includes a cylinder body 110, a mounting cavity 210 is formed inside the cylinder body 110, piston cavities 220 communicating with the mounting cavity 210 are formed at both ends of the cylinder body 110, and cylinder covers 120 for sealing the piston cavities 220 are detachably provided at both ends of the cylinder body 110, and the piston cavities 220 at both ends are staggered and arranged in parallel in the horizontal direction;

[0041] An air cavity 230 is formed inside the cylinder head 120, and an exhaust pipe 330 and an intake pipe 340 are respectively provided at the top and bottom of the cylinder head 120. An intake channel 240 connecting the air cavity 230, the exhaust pipe 330 and the second one-way valve 320 is formed at the cylinder head 120. A first one-way valve 310 and a second one-way valve 320 are respectively provided in the intake channel 240, and the first one-way valve 310 and the second one-way valve 320 are oppositely arranged. A piston mechanism 130 is provided in the installation cavity 210. The piston mechanism 130 has a driving assembly arranged at the installation cavity 210 and two piston assemblies 430 corresponding to the piston cavities 220 at both ends. The piston assembly 430 is used to separate the air cavity 230 from the piston cavity 220, and the driving assembly is used to synchronously and unidirectionally drive the piston assembly 430 to reciprocate along the piston cavity 220.

[0042] The present invention discloses a high-efficiency and energy-saving compressor suitable for a variable-frequency permanent magnet motor. Through the arrangement of a cylinder body 110, a drive assembly and a piston assembly 430, the two piston assemblies 430 can be driven to reciprocate in a piston cavity 220 synchronously and in the same direction, thereby improving the gas processing capacity of the compressor and enabling the gas to be effectively compressed in a shorter time.

[0043] It can be understood that the piston cavities 220 at both ends are arranged in parallel and staggered in the horizontal direction, which optimizes the flow path of the gas, reduces the energy loss of the gas during the compression process, and thus improves the compression efficiency.

[0044] In this embodiment, the driving assembly includes a fixed seat 410 arranged at the installation cavity 210, and a crankshaft 420 is rotatably provided at the fixed seat 410. An extension shaft 440 that passes through the cylinder body 110 is axially provided at the crankshaft 420. The extension shaft 440 is used to connect to the variable frequency permanent magnet motor. The two piston assemblies 430 are both rotatably provided at the crankshaft 420.

[0045] Through the above structure, the two piston assemblies 430 can perform reciprocating work synchronously, thereby improving the compression amount and compression efficiency of the gas.

[0046] In this embodiment, the piston assembly 430 includes a piston arm 510 arranged at the crankshaft 420, a connecting seat 520 is rotatably provided at the end of the piston arm 510, a piston member 530 that cooperates with the inner wall of the piston cavity 220 is detachably provided at the connecting seat 520, and a connecting rod 540 is detachably provided at the end of the piston member 530 away from the connecting seat 520, and a diaphragm 550 is formed at the connecting rod 540 and is arranged between the cylinder body 110 and the cylinder head 120.

[0047] By setting the piston assembly 430, the piston member 530 moves back and forth in the piston cavity 220, and at the same time, the diaphragm 550 is driven to deform through the connecting rod 540, thereby realizing gas compression, ensuring the high efficiency and stability of the gas during the compression process.

[0048] It can be understood that the piston member, the piston cavity 220 and the diaphragm 550 are arranged in coordination so that when the gas is compressed, the piston member and the diaphragm 550 can move back and forth synchronously, thereby ensuring the sealing and stability of the gas during the compression process. Even if either the piston member or the diaphragm 550 is damaged, the normal operation of the device can be guaranteed, thereby improving the stability of the device.

[0049] An oil inlet pipe communicating with the two piston cavities 220 is formed on the outer wall of the cylinder body 110 , and the oil inlet pipe is located between the piston member 530 and the diaphragm 550 .

[0050] In this embodiment, grooves are formed at the opposite side walls of the cylinder body 110 and the cylinder cover 120 , a mounting area is formed between adjacent grooves, and an annular protrusion matching the mounting area is formed at the outer wall of the diaphragm 550 .

[0051] By embedding the annular protrusion of the diaphragm 550 into the installation area between the cylinder body 110 and the cylinder head 120, a close contact surface can be formed, thereby effectively preventing gas leakage during the compression process, which not only improves the sealing performance of the compressor but also ensures efficient compression of the gas.

[0052] It can be understood that the diaphragm 550 can be quickly installed and disassembled through the cooperation between the annular protrusion and the installation area, which not only simplifies the installation and maintenance process of the compressor, but also reduces the maintenance cost and time.

[0053] Example 2

[0054] See Figure 2-7 , this embodiment also provides a high-efficiency and energy-saving compressor suitable for variable frequency permanent magnet motors, which differs from the first embodiment in that: a rubber sleeve 610 is provided on the outer wall of the piston member 530, a first inner cavity 710 and a second inner cavity 720 are formed on the two side walls of the piston member 530 along the axial direction of the cylinder body 110, and a plurality of through-holes 730 communicating with the first inner cavity 710 and the second inner cavity 720 are formed at equal intervals on the outer wall of the piston member 530, wherein the plurality of through-holes 730 communicating with the first inner cavity 710 on the outer wall of the piston member 530 and the plurality of through-holes 730 communicating with the second inner cavity 720 on the outer wall of the piston member 530 are staggered;

[0055] A fixing ring 620 is formed inside the first inner cavity 710 and the second inner cavity 720 . The fixing ring 620 is provided with a plurality of extrusion pieces corresponding to the through openings 730 at equal intervals along the circumferential direction. The extrusion pieces are used to extrude the rubber sleeve 610 .

[0056] By opening a plurality of openings 730 communicating with the first inner cavity 710 and the second inner cavity 720 at equal intervals on the outer wall of the piston member 530 , the extrusion members in the first inner cavity 710 and the second inner cavity 720 can act on the rubber sleeve 610 , thereby achieving extrusion and sealing of the rubber sleeve 610 .

[0057] In this embodiment, an extrusion chamber 750 is formed inside the fixed ring 620, and a movable opening that passes through the extrusion chamber 750 is formed on the corresponding sides of the piston member 530 and the diaphragm 550. An extension tube 740 that passes through the extrusion chamber 750 is formed at the second inner cavity 720, and a top block 780 is slidably provided inside the extension tube 740. An extrusion plate 760 that cooperates with the movable opening is slidably provided in the extrusion chamber 750, and the extrusion plate 760 is used to drive the extrusion member to extrude the rubber sleeve 610 outward.

[0058] Through the combined action of the extrusion plate 760 and the extrusion member, the rubber sleeve 610 is effectively squeezed onto the piston cavity 220 , thereby significantly improving the sealing performance between the piston member 530 and the piston cavity 220 .

[0059] In this embodiment, a through groove 770 is formed on the outer wall of the extension tube 740 , and the outer wall of the top block 780 has a connecting portion that passes through the through groove 770 , and a first hemispherical portion that cooperates with the outer wall of the extension tube 740 is formed between the connecting portions.

[0060] Through the coordinated arrangement of the connecting portion and the through groove 770 , the top block 780 can slide smoothly in the extension tube 740 , thereby achieving stable squeezing of the rubber sleeve 610 by the first hemispherical portion.

[0061] It can be understood that the provision of the first hemispherical portion enables the top block 780 to better drive the hemispherical extrusion block 650 during the sliding process, thereby reducing friction and wear.

[0062] In this embodiment, a second hemispherical portion is formed at one end of the extrusion chamber 750 close to the top block 780 , and a push rod corresponding to the first hemispherical portion is formed at the second hemispherical portion. The push rod is used to drive the top block 780 to slide along the through groove 770 .

[0063] Through the above structure, after the rubber sleeve 610 portion corresponding to the arc-shaped extrusion block 670 in the first inner cavity 710 is worn, the extrusion plate 760 can squeeze the top block 780, so that the rubber sleeve 610 portion corresponding to the arc-shaped extrusion block 670 in the second inner cavity 720 is squeezed outward, thereby forming a seal on the inner wall of the piston cavity 220, thereby increasing the service life of the device and further improving the stability of the device operation.

[0064] When the rubber sleeve 610 portion corresponding to the arc-shaped extrusion block 670 in the first inner cavity 710 is normal, the rubber sleeve 610 portion corresponding to the arc-shaped extrusion block 670 in the second inner cavity 720 is subjected to a small extrusion force, that is, it only relies on the rubber sleeve 610 portion corresponding to the arc-shaped extrusion block 670 in the first inner cavity 710 for sealing. After the rubber sleeve 610 portion corresponding to the arc-shaped extrusion block 670 in the first inner cavity 710 is gradually worn, the extrusion plate 760 can squeeze the top block 780, so that the rubber sleeve 610 portion corresponding to the arc-shaped extrusion block 670 in the second inner cavity 720 is squeezed outward, thereby forming a seal on the inner wall of the piston cavity 220.

[0065] In this embodiment, the extrusion member includes a guide plate 630 arranged at the side wall of the first inner cavity 710 or the second inner cavity 720, a slide rod 640 is slidably provided between the guide plate 630 and the fixed ring 620, one end of the slide rod 640 is provided with a hemispherical extrusion block 650 that passes through the fixed ring 620 and contacts the first hemispherical portion or the second hemispherical portion, the other end of the slide rod 640 is provided with an arc-shaped extrusion block 670 that passes through the guide plate 630 and corresponds to the through opening 730, a spring 660 is provided between the fixed ring 620 and the guide plate 630, and the spring 660 is used to provide an elastic force to keep the arc-shaped extrusion block 670 pressed tightly toward the through opening 730.

[0066] Through the coordinated action of the hemispherical extrusion block 650 and the arc-shaped extrusion block 670 , the rubber sleeve 610 can be extruded in all directions, thereby improving the uniformity and stability of the extrusion.

[0067] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application to obtain other embodiments based on one or several embodiments provided in the present application, and these embodiments do not exceed the protection scope of the present application.

[0068] The present invention and its implementation methods are described schematically above, and the description is not restrictive. The embodiments shown in the embodiments are only part of the implementation methods of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by the embodiments and designs a structure and an implementation method similar to the technical solution without creativity without departing from the purpose of the invention, they should all fall within the protection scope of the present invention.

Claims

1. A high-efficiency and energy-saving compressor suitable for variable frequency permanent magnet motor, characterized in that: The invention comprises a cylinder body (110), wherein an installation cavity (210) is formed inside the cylinder body (110), piston cavities (220) communicating with the installation cavity (210) are formed at both ends of the cylinder body (110), and cylinder covers (120) for sealing the piston cavity (220) are detachably provided at both ends of the cylinder body (110), wherein the piston cavities (220) at both ends are arranged in parallel and staggered in a horizontal direction; An air cavity (230) is formed inside the cylinder head (120), an exhaust pipe (330) and an intake pipe (340) are respectively provided at the top and bottom of the cylinder head (120), an intake passage (240) is formed at the cylinder head (120) and communicates with the air cavity (230), the exhaust pipe (330) and the second one-way valve (320), a first one-way valve (310) and a second one-way valve (320) are respectively provided in the intake passage (240), the first one-way valve (310) and the second one-way valve ( 320) is arranged oppositely, a piston mechanism (130) is arranged in the installation cavity (210), the piston mechanism (130) has a driving assembly arranged at the installation cavity (210) and two piston assemblies (430) corresponding to the piston cavities (220) at both ends, the piston assembly (430) is used to separate the air cavity (230) from the piston cavity (220), and the driving assembly is used to synchronously and unidirectionally drive the piston assembly (430) to move back and forth along the piston cavity (220).

2. A high-efficiency energy-saving compressor suitable for variable frequency permanent magnet motor according to claim 1, characterized in that: The driving assembly comprises a fixing seat (410) arranged at the installation cavity (210), a crankshaft (420) being rotatably arranged at the fixing seat (410), an extension shaft (440) penetrating the cylinder body (110) being arranged axially at the crankshaft (420), the extension shaft (440) being used to be connected to a variable frequency permanent magnet motor, and the two piston assemblies (430) being rotatably arranged at the crankshaft (420).

3. The high-efficiency energy-saving compressor suitable for variable frequency permanent magnet motor according to claim 2, characterized in that: The piston assembly (430) includes a piston arm (510) disposed at the crankshaft (420), a connecting seat (520) being rotatably provided at the end of the piston arm (510), a piston member (530) which cooperates with the inner wall of the piston cavity (220) being detachably provided at the connecting seat (520), a connecting rod (540) being detachably provided at the end of the piston member (530) away from the connecting seat (520), and a diaphragm (550) being formed at the connecting rod (540) and disposed between the cylinder body (110) and the cylinder head (120).

4. The high-efficiency energy-saving compressor suitable for variable frequency permanent magnet motor according to claim 3, characterized in that: Grooves are formed at opposite side walls of the cylinder body (110) and the cylinder cover (120), installation intervals are formed between adjacent grooves, and an annular convex portion matching the installation interval is formed at the outer wall of the diaphragm (550).

5. The high-efficiency energy-saving compressor suitable for variable frequency permanent magnet motor according to claim 3, characterized in that: A rubber sleeve (610) is provided on the outer wall of the piston member (530), and a first inner cavity (710) and a second inner cavity (720) are formed on the two side walls of the piston member (530) along the axial direction of the cylinder body (110). A plurality of through-holes (730) communicating with the first inner cavity (710) and the second inner cavity (720) are formed at equal intervals on the outer wall of the piston member (530), wherein the plurality of through-holes (730) communicating with the first inner cavity (710) on the outer wall of the piston member (530) and the plurality of through-holes (730) communicating with the second inner cavity (720) on the outer wall of the piston member (530) are staggered; A fixing ring (620) is formed inside the first inner cavity (710) and the second inner cavity (720). The fixing ring (620) is provided with a plurality of extrusion pieces corresponding to the through openings (730) at equal intervals along the circumferential direction. The extrusion pieces are used to extrude the rubber sleeve (610).

6. The high-efficiency energy-saving compressor suitable for variable frequency permanent magnet motor according to claim 5, characterized in that: An extrusion chamber (750) is formed inside the fixed ring (620), and a movable opening that communicates with the extrusion chamber (750) is formed on the corresponding sides of the piston member (530) and the diaphragm (550). An extension tube (740) that communicates with the extrusion chamber (750) is formed at the second inner cavity (720), and a top block (780) is slidably provided inside the extension tube (740). An extrusion plate (760) that cooperates with the movable opening is slidably provided in the extrusion chamber (750), and the extrusion plate (760) that cooperates with the movable opening is used to drive the extrusion member to extrude the rubber sleeve (610) outward.

7. The high-efficiency energy-saving compressor suitable for variable frequency permanent magnet motor according to claim 6, characterized in that: A through groove (770) is formed on the outer wall of the extension tube (740), and the outer wall of the top block (780) has a connecting portion that passes through the through groove (770), and a first hemispherical portion that matches the outer wall of the extension tube (740) is formed between the connecting portions.

8. The high-efficiency energy-saving compressor suitable for variable frequency permanent magnet motor according to claim 6, characterized in that: A second hemispherical portion is formed at one end of the extrusion cavity (750) close to the top block (780), and a push rod corresponding to the first hemispherical portion is formed at the second hemispherical portion. The push rod is used to drive the top block (780) to slide along the through groove (770).

9. The high-efficiency energy-saving compressor suitable for variable frequency permanent magnet motor according to claim 1, characterized in that: The extrusion member includes a guide plate (630) arranged at the side wall of the first inner cavity (710) or the second inner cavity (720), a slide rod (640) is slidably arranged between the guide plate (630) and the fixed ring (620), one end of the slide rod (640) is provided with a hemispherical extrusion block (650) that passes through the fixed ring (620) and contacts the first hemispherical part or the second hemispherical part, and the other end of the slide rod (640) is provided with an arc-shaped extrusion block (670) that passes through the guide plate (630) and corresponds to the through opening (730), and a spring (660) is arranged between the fixed ring (620) and the guide plate (630), and the spring (660 is used to provide an elastic force to keep the arc-shaped extrusion block (670) pressed against the through opening (730).

Images